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- Committer: Teddy Hogeborn
- Date: 2010-06-19 00:37:04 UTC
- mto: (24.1.149 mandos)
- mto: This revision was merged to the branch mainline in revision 417.
- Revision ID: teddy@fukt.bsnet.se-20100619003704-vpicvssvv1ktg2om
* mandos (ClientHandler.handle): Set up the GnuTLS session object
before reading the protocol number.
(ClientHandler.handle/ProxyObject): New.
before reading the protocol number.
(ClientHandler.handle/ProxyObject): New.
- files removed:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2016 Teddy Hogeborn
15
# Copyright © 2008-2016 Björn Påhlsson
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 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@recompile.se>.
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
32
#
33
33
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
36
37
from future_builtins import *
38
39
try:
40
import SocketServer as socketserver
41
except ImportError:
42
import socketserver
34
from __future__ import division, with_statement, absolute_import
35
36
import SocketServer as socketserver
43
37
import socket
44
import argparse
38
import optparse
45
39
import datetime
46
40
import errno
47
try:
48
import ConfigParser as configparser
49
except ImportError:
50
import configparser
41
import gnutls.crypto
42
import gnutls.connection
43
import gnutls.errors
44
import gnutls.library.functions
45
import gnutls.library.constants
46
import gnutls.library.types
47
import ConfigParser as configparser
51
48
import sys
52
49
import re
53
50
import os
62
59
import struct
63
60
import fcntl
64
61
import functools
65
try:
66
import cPickle as pickle
67
except ImportError:
68
import pickle
69
import multiprocessing
70
import types
71
import binascii
72
import tempfile
73
import itertools
74
import collections
75
import codecs
62
import cPickle as pickle
63
import select
76
64
77
65
import dbus
78
66
import dbus.service
79
try:
80
import gobject
81
except ImportError:
82
from gi.repository import GObject as gobject
67
import gobject
83
68
import avahi
84
69
from dbus.mainloop.glib import DBusGMainLoop
85
70
import ctypes
95
80
except ImportError:
96
81
SO_BINDTODEVICE = None
97
82
98
if sys.version_info.major == 2:
99
str = unicode
100
101
version = "1.7.2"
102
stored_state_file = "clients.pickle"
103
104
logger = logging.getLogger()
105
syslogger = None
106
107
try:
108
if_nametoindex = ctypes.cdll.LoadLibrary(
109
ctypes.util.find_library("c")).if_nametoindex
110
except (OSError, AttributeError):
111
112
def if_nametoindex(interface):
113
"Get an interface index the hard way, i.e. using fcntl()"
114
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
115
with contextlib.closing(socket.socket()) as s:
116
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
117
struct.pack(b"16s16x", interface))
118
interface_index = struct.unpack("I", ifreq[16:20])[0]
119
return interface_index
120
121
122
def initlogger(debug, level=logging.WARNING):
123
"""init logger and add loglevel"""
124
125
global syslogger
126
syslogger = (logging.handlers.SysLogHandler(
127
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
128
address = "/dev/log"))
129
syslogger.setFormatter(logging.Formatter
130
('Mandos [%(process)d]: %(levelname)s:'
131
' %(message)s'))
132
logger.addHandler(syslogger)
133
134
if debug:
135
console = logging.StreamHandler()
136
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
137
' [%(process)d]:'
138
' %(levelname)s:'
139
' %(message)s'))
140
logger.addHandler(console)
141
logger.setLevel(level)
142
143
144
class PGPError(Exception):
145
"""Exception if encryption/decryption fails"""
146
pass
147
148
149
class PGPEngine(object):
150
"""A simple class for OpenPGP symmetric encryption & decryption"""
151
152
def __init__(self):
153
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
154
self.gpg = "gpg"
155
try:
156
output = subprocess.check_output(["gpgconf"])
157
for line in output.splitlines():
158
name, text, path = line.split(":")
159
if name == "gpg":
160
self.gpg = path
161
break
162
except OSError as e:
163
if e.errno != errno.ENOENT:
164
raise
165
self.gnupgargs = ['--batch',
166
'--homedir', self.tempdir,
167
'--force-mdc',
168
'--quiet',
169
'--no-use-agent']
170
171
def __enter__(self):
172
return self
173
174
def __exit__(self, exc_type, exc_value, traceback):
175
self._cleanup()
176
return False
177
178
def __del__(self):
179
self._cleanup()
180
181
def _cleanup(self):
182
if self.tempdir is not None:
183
# Delete contents of tempdir
184
for root, dirs, files in os.walk(self.tempdir,
185
topdown = False):
186
for filename in files:
187
os.remove(os.path.join(root, filename))
188
for dirname in dirs:
189
os.rmdir(os.path.join(root, dirname))
190
# Remove tempdir
191
os.rmdir(self.tempdir)
192
self.tempdir = None
193
194
def password_encode(self, password):
195
# Passphrase can not be empty and can not contain newlines or
196
# NUL bytes. So we prefix it and hex encode it.
197
encoded = b"mandos" + binascii.hexlify(password)
198
if len(encoded) > 2048:
199
# GnuPG can't handle long passwords, so encode differently
200
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
201
.replace(b"\n", b"\\n")
202
.replace(b"\0", b"\\x00"))
203
return encoded
204
205
def encrypt(self, data, password):
206
passphrase = self.password_encode(password)
207
with tempfile.NamedTemporaryFile(
208
dir=self.tempdir) as passfile:
209
passfile.write(passphrase)
210
passfile.flush()
211
proc = subprocess.Popen([self.gpg, '--symmetric',
212
'--passphrase-file',
213
passfile.name]
214
+ self.gnupgargs,
215
stdin = subprocess.PIPE,
216
stdout = subprocess.PIPE,
217
stderr = subprocess.PIPE)
218
ciphertext, err = proc.communicate(input = data)
219
if proc.returncode != 0:
220
raise PGPError(err)
221
return ciphertext
222
223
def decrypt(self, data, password):
224
passphrase = self.password_encode(password)
225
with tempfile.NamedTemporaryFile(
226
dir = self.tempdir) as passfile:
227
passfile.write(passphrase)
228
passfile.flush()
229
proc = subprocess.Popen([self.gpg, '--decrypt',
230
'--passphrase-file',
231
passfile.name]
232
+ self.gnupgargs,
233
stdin = subprocess.PIPE,
234
stdout = subprocess.PIPE,
235
stderr = subprocess.PIPE)
236
decrypted_plaintext, err = proc.communicate(input = data)
237
if proc.returncode != 0:
238
raise PGPError(err)
239
return decrypted_plaintext
240
83
84
version = "1.0.14"
85
86
logger = logging.Logger(u'mandos')
87
syslogger = (logging.handlers.SysLogHandler
88
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
89
address = "/dev/log"))
90
syslogger.setFormatter(logging.Formatter
91
(u'Mandos [%(process)d]: %(levelname)s:'
92
u' %(message)s'))
93
logger.addHandler(syslogger)
94
95
console = logging.StreamHandler()
96
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
97
u' %(levelname)s:'
98
u' %(message)s'))
99
logger.addHandler(console)
241
100
242
101
class AvahiError(Exception):
243
102
def __init__(self, value, *args, **kwargs):
244
103
self.value = value
245
return super(AvahiError, self).__init__(value, *args,
246
**kwargs)
247
104
super(AvahiError, self).__init__(value, *args, **kwargs)
105
def __unicode__(self):
106
return unicode(repr(self.value))
248
107
249
108
class AvahiServiceError(AvahiError):
250
109
pass
251
110
252
253
111
class AvahiGroupError(AvahiError):
254
112
pass
255
113
260
118
Attributes:
261
119
interface: integer; avahi.IF_UNSPEC or an interface index.
262
120
Used to optionally bind to the specified interface.
263
name: string; Example: 'Mandos'
264
type: string; Example: '_mandos._tcp'.
265
See <https://www.iana.org/assignments/service-names-port-numbers>
121
name: string; Example: u'Mandos'
122
type: string; Example: u'_mandos._tcp'.
123
See <http://www.dns-sd.org/ServiceTypes.html>
266
124
port: integer; what port to announce
267
125
TXT: list of strings; TXT record for the service
268
126
domain: string; Domain to publish on, default to .local if empty.
274
132
server: D-Bus Server
275
133
bus: dbus.SystemBus()
276
134
"""
277
278
def __init__(self,
279
interface = avahi.IF_UNSPEC,
280
name = None,
281
servicetype = None,
282
port = None,
283
TXT = None,
284
domain = "",
285
host = "",
286
max_renames = 32768,
287
protocol = avahi.PROTO_UNSPEC,
288
bus = None):
135
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
136
servicetype = None, port = None, TXT = None,
137
domain = u"", host = u"", max_renames = 32768,
138
protocol = avahi.PROTO_UNSPEC, bus = None):
289
139
self.interface = interface
290
140
self.name = name
291
141
self.type = servicetype
299
149
self.group = None # our entry group
300
150
self.server = None
301
151
self.bus = bus
302
self.entry_group_state_changed_match = None
303
304
def rename(self, remove=True):
152
def rename(self):
305
153
"""Derived from the Avahi example code"""
306
154
if self.rename_count >= self.max_renames:
307
logger.critical("No suitable Zeroconf service name found"
308
" after %i retries, exiting.",
155
logger.critical(u"No suitable Zeroconf service name found"
156
u" after %i retries, exiting.",
309
157
self.rename_count)
310
raise AvahiServiceError("Too many renames")
311
self.name = str(
312
self.server.GetAlternativeServiceName(self.name))
158
raise AvahiServiceError(u"Too many renames")
159
self.name = self.server.GetAlternativeServiceName(self.name)
160
logger.info(u"Changing Zeroconf service name to %r ...",
161
unicode(self.name))
162
syslogger.setFormatter(logging.Formatter
163
(u'Mandos (%s) [%%(process)d]:'
164
u' %%(levelname)s: %%(message)s'
165
% self.name))
166
self.remove()
167
self.add()
313
168
self.rename_count += 1
314
logger.info("Changing Zeroconf service name to %r ...",
315
self.name)
316
if remove:
317
self.remove()
318
try:
319
self.add()
320
except dbus.exceptions.DBusException as error:
321
if (error.get_dbus_name()
322
== "org.freedesktop.Avahi.CollisionError"):
323
logger.info("Local Zeroconf service name collision.")
324
return self.rename(remove=False)
325
else:
326
logger.critical("D-Bus Exception", exc_info=error)
327
self.cleanup()
328
os._exit(1)
329
330
169
def remove(self):
331
170
"""Derived from the Avahi example code"""
332
if self.entry_group_state_changed_match is not None:
333
self.entry_group_state_changed_match.remove()
334
self.entry_group_state_changed_match = None
335
171
if self.group is not None:
336
172
self.group.Reset()
337
338
173
def add(self):
339
174
"""Derived from the Avahi example code"""
340
self.remove()
341
175
if self.group is None:
342
176
self.group = dbus.Interface(
343
177
self.bus.get_object(avahi.DBUS_NAME,
344
178
self.server.EntryGroupNew()),
345
179
avahi.DBUS_INTERFACE_ENTRY_GROUP)
346
self.entry_group_state_changed_match = (
347
self.group.connect_to_signal(
348
'StateChanged', self.entry_group_state_changed))
349
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
180
self.group.connect_to_signal('StateChanged',
181
self
182
.entry_group_state_changed)
183
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
350
184
self.name, self.type)
351
185
self.group.AddService(
352
186
self.interface,
357
191
dbus.UInt16(self.port),
358
192
avahi.string_array_to_txt_array(self.TXT))
359
193
self.group.Commit()
360
361
194
def entry_group_state_changed(self, state, error):
362
195
"""Derived from the Avahi example code"""
363
logger.debug("Avahi entry group state change: %i", state)
196
logger.debug(u"Avahi state change: %i", state)
364
197
365
198
if state == avahi.ENTRY_GROUP_ESTABLISHED:
366
logger.debug("Zeroconf service established.")
199
logger.debug(u"Zeroconf service established.")
367
200
elif state == avahi.ENTRY_GROUP_COLLISION:
368
logger.info("Zeroconf service name collision.")
201
logger.warning(u"Zeroconf service name collision.")
369
202
self.rename()
370
203
elif state == avahi.ENTRY_GROUP_FAILURE:
371
logger.critical("Avahi: Error in group state changed %s",
372
str(error))
373
raise AvahiGroupError("State changed: {!s}".format(error))
374
204
logger.critical(u"Avahi: Error in group state changed %s",
205
unicode(error))
206
raise AvahiGroupError(u"State changed: %s"
207
% unicode(error))
375
208
def cleanup(self):
376
209
"""Derived from the Avahi example code"""
377
210
if self.group is not None:
378
try:
379
self.group.Free()
380
except (dbus.exceptions.UnknownMethodException,
381
dbus.exceptions.DBusException):
382
pass
211
self.group.Free()
383
212
self.group = None
384
self.remove()
385
386
def server_state_changed(self, state, error=None):
213
def server_state_changed(self, state):
387
214
"""Derived from the Avahi example code"""
388
logger.debug("Avahi server state change: %i", state)
389
bad_states = {
390
avahi.SERVER_INVALID: "Zeroconf server invalid",
391
avahi.SERVER_REGISTERING: None,
392
avahi.SERVER_COLLISION: "Zeroconf server name collision",
393
avahi.SERVER_FAILURE: "Zeroconf server failure",
394
}
395
if state in bad_states:
396
if bad_states[state] is not None:
397
if error is None:
398
logger.error(bad_states[state])
399
else:
400
logger.error(bad_states[state] + ": %r", error)
401
self.cleanup()
215
if state == avahi.SERVER_COLLISION:
216
logger.error(u"Zeroconf server name collision")
217
self.remove()
402
218
elif state == avahi.SERVER_RUNNING:
403
try:
404
self.add()
405
except dbus.exceptions.DBusException as error:
406
if (error.get_dbus_name()
407
== "org.freedesktop.Avahi.CollisionError"):
408
logger.info("Local Zeroconf service name"
409
" collision.")
410
return self.rename(remove=False)
411
else:
412
logger.critical("D-Bus Exception", exc_info=error)
413
self.cleanup()
414
os._exit(1)
415
else:
416
if error is None:
417
logger.debug("Unknown state: %r", state)
418
else:
419
logger.debug("Unknown state: %r: %r", state, error)
420
219
self.add()
421
220
def activate(self):
422
221
"""Derived from the Avahi example code"""
423
222
if self.server is None:
424
223
self.server = dbus.Interface(
425
224
self.bus.get_object(avahi.DBUS_NAME,
426
avahi.DBUS_PATH_SERVER,
427
follow_name_owner_changes=True),
225
avahi.DBUS_PATH_SERVER),
428
226
avahi.DBUS_INTERFACE_SERVER)
429
self.server.connect_to_signal("StateChanged",
430
self.server_state_changed)
227
self.server.connect_to_signal(u"StateChanged",
228
self.server_state_changed)
431
229
self.server_state_changed(self.server.GetState())
432
230
433
231
434
class AvahiServiceToSyslog(AvahiService):
435
def rename(self, *args, **kwargs):
436
"""Add the new name to the syslog messages"""
437
ret = AvahiService.rename(self, *args, **kwargs)
438
syslogger.setFormatter(logging.Formatter(
439
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
440
.format(self.name)))
441
return ret
442
443
# Pretend that we have a GnuTLS module
444
class GnuTLS(object):
445
"""This isn't so much a class as it is a module-like namespace.
446
It is instantiated once, and simulates having a GnuTLS module."""
447
448
_library = ctypes.cdll.LoadLibrary(
449
ctypes.util.find_library("gnutls"))
450
_need_version = "3.3.0"
451
def __init__(self):
452
# Need to use class name "GnuTLS" here, since this method is
453
# called before the assignment to the "gnutls" global variable
454
# happens.
455
if GnuTLS.check_version(self._need_version) is None:
456
raise GnuTLS.Error("Needs GnuTLS {} or later"
457
.format(self._need_version))
458
459
# Unless otherwise indicated, the constants and types below are
460
# all from the gnutls/gnutls.h C header file.
461
462
# Constants
463
E_SUCCESS = 0
464
E_INTERRUPTED = -52
465
E_AGAIN = -28
466
CRT_OPENPGP = 2
467
CLIENT = 2
468
SHUT_RDWR = 0
469
CRD_CERTIFICATE = 1
470
E_NO_CERTIFICATE_FOUND = -49
471
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
472
473
# Types
474
class session_int(ctypes.Structure):
475
_fields_ = []
476
session_t = ctypes.POINTER(session_int)
477
class certificate_credentials_st(ctypes.Structure):
478
_fields_ = []
479
certificate_credentials_t = ctypes.POINTER(
480
certificate_credentials_st)
481
certificate_type_t = ctypes.c_int
482
class datum_t(ctypes.Structure):
483
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
484
('size', ctypes.c_uint)]
485
class openpgp_crt_int(ctypes.Structure):
486
_fields_ = []
487
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
488
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
489
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
490
credentials_type_t = ctypes.c_int #
491
transport_ptr_t = ctypes.c_void_p
492
close_request_t = ctypes.c_int
493
494
# Exceptions
495
class Error(Exception):
496
# We need to use the class name "GnuTLS" here, since this
497
# exception might be raised from within GnuTLS.__init__,
498
# which is called before the assignment to the "gnutls"
499
# global variable has happened.
500
def __init__(self, message = None, code = None, args=()):
501
# Default usage is by a message string, but if a return
502
# code is passed, convert it to a string with
503
# gnutls.strerror()
504
self.code = code
505
if message is None and code is not None:
506
message = GnuTLS.strerror(code)
507
return super(GnuTLS.Error, self).__init__(
508
message, *args)
509
510
class CertificateSecurityError(Error):
511
pass
512
513
# Classes
514
class Credentials(object):
515
def __init__(self):
516
self._c_object = gnutls.certificate_credentials_t()
517
gnutls.certificate_allocate_credentials(
518
ctypes.byref(self._c_object))
519
self.type = gnutls.CRD_CERTIFICATE
520
521
def __del__(self):
522
gnutls.certificate_free_credentials(self._c_object)
523
524
class ClientSession(object):
525
def __init__(self, socket, credentials = None):
526
self._c_object = gnutls.session_t()
527
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
528
gnutls.set_default_priority(self._c_object)
529
gnutls.transport_set_ptr(self._c_object, socket.fileno())
530
gnutls.handshake_set_private_extensions(self._c_object,
531
True)
532
self.socket = socket
533
if credentials is None:
534
credentials = gnutls.Credentials()
535
gnutls.credentials_set(self._c_object, credentials.type,
536
ctypes.cast(credentials._c_object,
537
ctypes.c_void_p))
538
self.credentials = credentials
539
540
def __del__(self):
541
gnutls.deinit(self._c_object)
542
543
def handshake(self):
544
return gnutls.handshake(self._c_object)
545
546
def send(self, data):
547
data = bytes(data)
548
data_len = len(data)
549
while data_len > 0:
550
data_len -= gnutls.record_send(self._c_object,
551
data[-data_len:],
552
data_len)
553
554
def bye(self):
555
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
556
557
# Error handling functions
558
def _error_code(result):
559
"""A function to raise exceptions on errors, suitable
560
for the 'restype' attribute on ctypes functions"""
561
if result >= 0:
562
return result
563
if result == gnutls.E_NO_CERTIFICATE_FOUND:
564
raise gnutls.CertificateSecurityError(code = result)
565
raise gnutls.Error(code = result)
566
567
def _retry_on_error(result, func, arguments):
568
"""A function to retry on some errors, suitable
569
for the 'errcheck' attribute on ctypes functions"""
570
while result < 0:
571
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
572
return _error_code(result)
573
result = func(*arguments)
574
return result
575
576
# Unless otherwise indicated, the function declarations below are
577
# all from the gnutls/gnutls.h C header file.
578
579
# Functions
580
priority_set_direct = _library.gnutls_priority_set_direct
581
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
582
ctypes.POINTER(ctypes.c_char_p)]
583
priority_set_direct.restype = _error_code
584
585
init = _library.gnutls_init
586
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
587
init.restype = _error_code
588
589
set_default_priority = _library.gnutls_set_default_priority
590
set_default_priority.argtypes = [session_t]
591
set_default_priority.restype = _error_code
592
593
record_send = _library.gnutls_record_send
594
record_send.argtypes = [session_t, ctypes.c_void_p,
595
ctypes.c_size_t]
596
record_send.restype = ctypes.c_ssize_t
597
record_send.errcheck = _retry_on_error
598
599
certificate_allocate_credentials = (
600
_library.gnutls_certificate_allocate_credentials)
601
certificate_allocate_credentials.argtypes = [
602
ctypes.POINTER(certificate_credentials_t)]
603
certificate_allocate_credentials.restype = _error_code
604
605
certificate_free_credentials = (
606
_library.gnutls_certificate_free_credentials)
607
certificate_free_credentials.argtypes = [certificate_credentials_t]
608
certificate_free_credentials.restype = None
609
610
handshake_set_private_extensions = (
611
_library.gnutls_handshake_set_private_extensions)
612
handshake_set_private_extensions.argtypes = [session_t,
613
ctypes.c_int]
614
handshake_set_private_extensions.restype = None
615
616
credentials_set = _library.gnutls_credentials_set
617
credentials_set.argtypes = [session_t, credentials_type_t,
618
ctypes.c_void_p]
619
credentials_set.restype = _error_code
620
621
strerror = _library.gnutls_strerror
622
strerror.argtypes = [ctypes.c_int]
623
strerror.restype = ctypes.c_char_p
624
625
certificate_type_get = _library.gnutls_certificate_type_get
626
certificate_type_get.argtypes = [session_t]
627
certificate_type_get.restype = _error_code
628
629
certificate_get_peers = _library.gnutls_certificate_get_peers
630
certificate_get_peers.argtypes = [session_t,
631
ctypes.POINTER(ctypes.c_uint)]
632
certificate_get_peers.restype = ctypes.POINTER(datum_t)
633
634
global_set_log_level = _library.gnutls_global_set_log_level
635
global_set_log_level.argtypes = [ctypes.c_int]
636
global_set_log_level.restype = None
637
638
global_set_log_function = _library.gnutls_global_set_log_function
639
global_set_log_function.argtypes = [log_func]
640
global_set_log_function.restype = None
641
642
deinit = _library.gnutls_deinit
643
deinit.argtypes = [session_t]
644
deinit.restype = None
645
646
handshake = _library.gnutls_handshake
647
handshake.argtypes = [session_t]
648
handshake.restype = _error_code
649
handshake.errcheck = _retry_on_error
650
651
transport_set_ptr = _library.gnutls_transport_set_ptr
652
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
653
transport_set_ptr.restype = None
654
655
bye = _library.gnutls_bye
656
bye.argtypes = [session_t, close_request_t]
657
bye.restype = _error_code
658
bye.errcheck = _retry_on_error
659
660
check_version = _library.gnutls_check_version
661
check_version.argtypes = [ctypes.c_char_p]
662
check_version.restype = ctypes.c_char_p
663
664
# All the function declarations below are from gnutls/openpgp.h
665
666
openpgp_crt_init = _library.gnutls_openpgp_crt_init
667
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
668
openpgp_crt_init.restype = _error_code
669
670
openpgp_crt_import = _library.gnutls_openpgp_crt_import
671
openpgp_crt_import.argtypes = [openpgp_crt_t,
672
ctypes.POINTER(datum_t),
673
openpgp_crt_fmt_t]
674
openpgp_crt_import.restype = _error_code
675
676
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
677
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
678
ctypes.POINTER(ctypes.c_uint)]
679
openpgp_crt_verify_self.restype = _error_code
680
681
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
682
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
683
openpgp_crt_deinit.restype = None
684
685
openpgp_crt_get_fingerprint = (
686
_library.gnutls_openpgp_crt_get_fingerprint)
687
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
688
ctypes.c_void_p,
689
ctypes.POINTER(
690
ctypes.c_size_t)]
691
openpgp_crt_get_fingerprint.restype = _error_code
692
693
# Remove non-public functions
694
del _error_code, _retry_on_error
695
# Create the global "gnutls" object, simulating a module
696
gnutls = GnuTLS()
697
698
def call_pipe(connection, # : multiprocessing.Connection
699
func, *args, **kwargs):
700
"""This function is meant to be called by multiprocessing.Process
701
702
This function runs func(*args, **kwargs), and writes the resulting
703
return value on the provided multiprocessing.Connection.
704
"""
705
connection.send(func(*args, **kwargs))
706
connection.close()
707
708
232
class Client(object):
709
233
"""A representation of a client host served by this server.
710
234
711
235
Attributes:
712
approved: bool(); 'None' if not yet approved/disapproved
713
approval_delay: datetime.timedelta(); Time to wait for approval
714
approval_duration: datetime.timedelta(); Duration of one approval
236
name: string; from the config file, used in log messages and
237
D-Bus identifiers
238
fingerprint: string (40 or 32 hexadecimal digits); used to
239
uniquely identify the client
240
secret: bytestring; sent verbatim (over TLS) to client
241
host: string; available for use by the checker command
242
created: datetime.datetime(); (UTC) object creation
243
last_enabled: datetime.datetime(); (UTC)
244
enabled: bool()
245
last_checked_ok: datetime.datetime(); (UTC) or None
246
timeout: datetime.timedelta(); How long from last_checked_ok
247
until this client is disabled
248
interval: datetime.timedelta(); How often to start a new checker
249
disable_hook: If set, called by disable() as disable_hook(self)
715
250
checker: subprocess.Popen(); a running checker process used
716
251
to see if the client lives.
717
252
'None' if no process is running.
718
checker_callback_tag: a gobject event source tag, or None
719
checker_command: string; External command which is run to check
720
if client lives. %() expansions are done at
253
checker_initiator_tag: a gobject event source tag, or None
254
disable_initiator_tag: - '' -
255
checker_callback_tag: - '' -
256
checker_command: string; External command which is run to check if
257
client lives. %() expansions are done at
721
258
runtime with vars(self) as dict, so that for
722
259
instance %(name)s can be used in the command.
723
checker_initiator_tag: a gobject event source tag, or None
724
created: datetime.datetime(); (UTC) object creation
725
client_structure: Object describing what attributes a client has
726
and is used for storing the client at exit
727
260
current_checker_command: string; current running checker_command
728
disable_initiator_tag: a gobject event source tag, or None
729
enabled: bool()
730
fingerprint: string (40 or 32 hexadecimal digits); used to
731
uniquely identify the client
732
host: string; available for use by the checker command
733
interval: datetime.timedelta(); How often to start a new checker
734
last_approval_request: datetime.datetime(); (UTC) or None
735
last_checked_ok: datetime.datetime(); (UTC) or None
736
last_checker_status: integer between 0 and 255 reflecting exit
737
status of last checker. -1 reflects crashed
738
checker, -2 means no checker completed yet.
739
last_checker_signal: The signal which killed the last checker, if
740
last_checker_status is -1
741
last_enabled: datetime.datetime(); (UTC) or None
742
name: string; from the config file, used in log messages and
743
D-Bus identifiers
744
secret: bytestring; sent verbatim (over TLS) to client
745
timeout: datetime.timedelta(); How long from last_checked_ok
746
until this client is disabled
747
extended_timeout: extra long timeout when secret has been sent
748
runtime_expansions: Allowed attributes for runtime expansion.
749
expires: datetime.datetime(); time (UTC) when a client will be
750
disabled, or None
751
server_settings: The server_settings dict from main()
752
261
"""
753
262
754
runtime_expansions = ("approval_delay", "approval_duration",
755
"created", "enabled", "expires",
756
"fingerprint", "host", "interval",
757
"last_approval_request", "last_checked_ok",
758
"last_enabled", "name", "timeout")
759
client_defaults = {
760
"timeout": "PT5M",
761
"extended_timeout": "PT15M",
762
"interval": "PT2M",
763
"checker": "fping -q -- %%(host)s",
764
"host": "",
765
"approval_delay": "PT0S",
766
"approval_duration": "PT1S",
767
"approved_by_default": "True",
768
"enabled": "True",
769
}
770
771
263
@staticmethod
772
def config_parser(config):
773
"""Construct a new dict of client settings of this form:
774
{ client_name: {setting_name: value, ...}, ...}
775
with exceptions for any special settings as defined above.
776
NOTE: Must be a pure function. Must return the same result
777
value given the same arguments.
778
"""
779
settings = {}
780
for client_name in config.sections():
781
section = dict(config.items(client_name))
782
client = settings[client_name] = {}
783
784
client["host"] = section["host"]
785
# Reformat values from string types to Python types
786
client["approved_by_default"] = config.getboolean(
787
client_name, "approved_by_default")
788
client["enabled"] = config.getboolean(client_name,
789
"enabled")
790
791
# Uppercase and remove spaces from fingerprint for later
792
# comparison purposes with return value from the
793
# fingerprint() function
794
client["fingerprint"] = (section["fingerprint"].upper()
795
.replace(" ", ""))
796
if "secret" in section:
797
client["secret"] = section["secret"].decode("base64")
798
elif "secfile" in section:
799
with open(os.path.expanduser(os.path.expandvars
800
(section["secfile"])),
801
"rb") as secfile:
802
client["secret"] = secfile.read()
803
else:
804
raise TypeError("No secret or secfile for section {}"
805
.format(section))
806
client["timeout"] = string_to_delta(section["timeout"])
807
client["extended_timeout"] = string_to_delta(
808
section["extended_timeout"])
809
client["interval"] = string_to_delta(section["interval"])
810
client["approval_delay"] = string_to_delta(
811
section["approval_delay"])
812
client["approval_duration"] = string_to_delta(
813
section["approval_duration"])
814
client["checker_command"] = section["checker"]
815
client["last_approval_request"] = None
816
client["last_checked_ok"] = None
817
client["last_checker_status"] = -2
818
819
return settings
820
821
def __init__(self, settings, name = None, server_settings=None):
264
def _timedelta_to_milliseconds(td):
265
"Convert a datetime.timedelta() to milliseconds"
266
return ((td.days * 24 * 60 * 60 * 1000)
267
+ (td.seconds * 1000)
268
+ (td.microseconds // 1000))
269
270
def timeout_milliseconds(self):
271
"Return the 'timeout' attribute in milliseconds"
272
return self._timedelta_to_milliseconds(self.timeout)
273
274
def interval_milliseconds(self):
275
"Return the 'interval' attribute in milliseconds"
276
return self._timedelta_to_milliseconds(self.interval)
277
278
def __init__(self, name = None, disable_hook=None, config=None):
279
"""Note: the 'checker' key in 'config' sets the
280
'checker_command' attribute and *not* the 'checker'
281
attribute."""
822
282
self.name = name
823
if server_settings is None:
824
server_settings = {}
825
self.server_settings = server_settings
826
# adding all client settings
827
for setting, value in settings.items():
828
setattr(self, setting, value)
829
830
if self.enabled:
831
if not hasattr(self, "last_enabled"):
832
self.last_enabled = datetime.datetime.utcnow()
833
if not hasattr(self, "expires"):
834
self.expires = (datetime.datetime.utcnow()
835
+ self.timeout)
283
if config is None:
284
config = {}
285
logger.debug(u"Creating client %r", self.name)
286
# Uppercase and remove spaces from fingerprint for later
287
# comparison purposes with return value from the fingerprint()
288
# function
289
self.fingerprint = (config[u"fingerprint"].upper()
290
.replace(u" ", u""))
291
logger.debug(u" Fingerprint: %s", self.fingerprint)
292
if u"secret" in config:
293
self.secret = config[u"secret"].decode(u"base64")
294
elif u"secfile" in config:
295
with open(os.path.expanduser(os.path.expandvars
296
(config[u"secfile"])),
297
"rb") as secfile:
298
self.secret = secfile.read()
836
299
else:
837
self.last_enabled = None
838
self.expires = None
839
840
logger.debug("Creating client %r", self.name)
841
logger.debug(" Fingerprint: %s", self.fingerprint)
842
self.created = settings.get("created",
843
datetime.datetime.utcnow())
844
845
# attributes specific for this server instance
300
raise TypeError(u"No secret or secfile for client %s"
301
% self.name)
302
self.host = config.get(u"host", u"")
303
self.created = datetime.datetime.utcnow()
304
self.enabled = False
305
self.last_enabled = None
306
self.last_checked_ok = None
307
self.timeout = string_to_delta(config[u"timeout"])
308
self.interval = string_to_delta(config[u"interval"])
309
self.disable_hook = disable_hook
846
310
self.checker = None
847
311
self.checker_initiator_tag = None
848
312
self.disable_initiator_tag = None
849
313
self.checker_callback_tag = None
314
self.checker_command = config[u"checker"]
850
315
self.current_checker_command = None
851
self.approved = None
852
self.approvals_pending = 0
853
self.changedstate = multiprocessing_manager.Condition(
854
multiprocessing_manager.Lock())
855
self.client_structure = [attr
856
for attr in self.__dict__.iterkeys()
857
if not attr.startswith("_")]
858
self.client_structure.append("client_structure")
859
860
for name, t in inspect.getmembers(
861
type(self), lambda obj: isinstance(obj, property)):
862
if not name.startswith("_"):
863
self.client_structure.append(name)
864
865
# Send notice to process children that client state has changed
866
def send_changedstate(self):
867
with self.changedstate:
868
self.changedstate.notify_all()
316
self.last_connect = None
869
317
870
318
def enable(self):
871
319
"""Start this client's checker and timeout hooks"""
872
if getattr(self, "enabled", False):
320
if getattr(self, u"enabled", False):
873
321
# Already enabled
874
322
return
875
self.expires = datetime.datetime.utcnow() + self.timeout
876
self.enabled = True
877
323
self.last_enabled = datetime.datetime.utcnow()
878
self.init_checker()
879
self.send_changedstate()
324
# Schedule a new checker to be started an 'interval' from now,
325
# and every interval from then on.
326
self.checker_initiator_tag = (gobject.timeout_add
327
(self.interval_milliseconds(),
328
self.start_checker))
329
# Schedule a disable() when 'timeout' has passed
330
self.disable_initiator_tag = (gobject.timeout_add
331
(self.timeout_milliseconds(),
332
self.disable))
333
self.enabled = True
334
# Also start a new checker *right now*.
335
self.start_checker()
880
336
881
337
def disable(self, quiet=True):
882
338
"""Disable this client."""
883
339
if not getattr(self, "enabled", False):
884
340
return False
885
341
if not quiet:
886
logger.info("Disabling client %s", self.name)
887
if getattr(self, "disable_initiator_tag", None) is not None:
342
logger.info(u"Disabling client %s", self.name)
343
if getattr(self, u"disable_initiator_tag", False):
888
344
gobject.source_remove(self.disable_initiator_tag)
889
345
self.disable_initiator_tag = None
890
self.expires = None
891
if getattr(self, "checker_initiator_tag", None) is not None:
346
if getattr(self, u"checker_initiator_tag", False):
892
347
gobject.source_remove(self.checker_initiator_tag)
893
348
self.checker_initiator_tag = None
894
349
self.stop_checker()
350
if self.disable_hook:
351
self.disable_hook(self)
895
352
self.enabled = False
896
if not quiet:
897
self.send_changedstate()
898
353
# Do not run this again if called by a gobject.timeout_add
899
354
return False
900
355
901
356
def __del__(self):
357
self.disable_hook = None
902
358
self.disable()
903
359
904
def init_checker(self):
905
# Schedule a new checker to be started an 'interval' from now,
906
# and every interval from then on.
907
if self.checker_initiator_tag is not None:
908
gobject.source_remove(self.checker_initiator_tag)
909
self.checker_initiator_tag = gobject.timeout_add(
910
int(self.interval.total_seconds() * 1000),
911
self.start_checker)
912
# Schedule a disable() when 'timeout' has passed
913
if self.disable_initiator_tag is not None:
914
gobject.source_remove(self.disable_initiator_tag)
915
self.disable_initiator_tag = gobject.timeout_add(
916
int(self.timeout.total_seconds() * 1000), self.disable)
917
# Also start a new checker *right now*.
918
self.start_checker()
919
920
def checker_callback(self, source, condition, connection,
921
command):
360
def checker_callback(self, pid, condition, command):
922
361
"""The checker has completed, so take appropriate actions."""
923
362
self.checker_callback_tag = None
924
363
self.checker = None
925
# Read return code from connection (see call_pipe)
926
returncode = connection.recv()
927
connection.close()
928
929
if returncode >= 0:
930
self.last_checker_status = returncode
931
self.last_checker_signal = None
932
if self.last_checker_status == 0:
933
logger.info("Checker for %(name)s succeeded",
364
if os.WIFEXITED(condition):
365
exitstatus = os.WEXITSTATUS(condition)
366
if exitstatus == 0:
367
logger.info(u"Checker for %(name)s succeeded",
934
368
vars(self))
935
369
self.checked_ok()
936
370
else:
937
logger.info("Checker for %(name)s failed", vars(self))
371
logger.info(u"Checker for %(name)s failed",
372
vars(self))
938
373
else:
939
self.last_checker_status = -1
940
self.last_checker_signal = -returncode
941
logger.warning("Checker for %(name)s crashed?",
374
logger.warning(u"Checker for %(name)s crashed?",
942
375
vars(self))
943
return False
944
376
945
377
def checked_ok(self):
946
"""Assert that the client has been seen, alive and well."""
378
"""Bump up the timeout for this client.
379
380
This should only be called when the client has been seen,
381
alive and well.
382
"""
947
383
self.last_checked_ok = datetime.datetime.utcnow()
948
self.last_checker_status = 0
949
self.last_checker_signal = None
950
self.bump_timeout()
951
952
def bump_timeout(self, timeout=None):
953
"""Bump up the timeout for this client."""
954
if timeout is None:
955
timeout = self.timeout
956
if self.disable_initiator_tag is not None:
957
gobject.source_remove(self.disable_initiator_tag)
958
self.disable_initiator_tag = None
959
if getattr(self, "enabled", False):
960
self.disable_initiator_tag = gobject.timeout_add(
961
int(timeout.total_seconds() * 1000), self.disable)
962
self.expires = datetime.datetime.utcnow() + timeout
963
964
def need_approval(self):
965
self.last_approval_request = datetime.datetime.utcnow()
384
gobject.source_remove(self.disable_initiator_tag)
385
self.disable_initiator_tag = (gobject.timeout_add
386
(self.timeout_milliseconds(),
387
self.disable))
966
388
967
389
def start_checker(self):
968
390
"""Start a new checker subprocess if one is not running.
970
392
If a checker already exists, leave it running and do
971
393
nothing."""
972
394
# The reason for not killing a running checker is that if we
973
# did that, and if a checker (for some reason) started running
974
# slowly and taking more than 'interval' time, then the client
975
# would inevitably timeout, since no checker would get a
976
# chance to run to completion. If we instead leave running
395
# did that, then if a checker (for some reason) started
396
# running slowly and taking more than 'interval' time, the
397
# client would inevitably timeout, since no checker would get
398
# a chance to run to completion. If we instead leave running
977
399
# checkers alone, the checker would have to take more time
978
400
# than 'timeout' for the client to be disabled, which is as it
979
401
# should be.
980
402
981
if self.checker is not None and not self.checker.is_alive():
982
logger.warning("Checker was not alive; joining")
983
self.checker.join()
984
self.checker = None
403
# If a checker exists, make sure it is not a zombie
404
try:
405
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
406
except (AttributeError, OSError), error:
407
if (isinstance(error, OSError)
408
and error.errno != errno.ECHILD):
409
raise error
410
else:
411
if pid:
412
logger.warning(u"Checker was a zombie")
413
gobject.source_remove(self.checker_callback_tag)
414
self.checker_callback(pid, status,
415
self.current_checker_command)
985
416
# Start a new checker if needed
986
417
if self.checker is None:
987
# Escape attributes for the shell
988
escaped_attrs = {
989
attr: re.escape(str(getattr(self, attr)))
990
for attr in self.runtime_expansions }
991
418
try:
992
command = self.checker_command % escaped_attrs
993
except TypeError as error:
994
logger.error('Could not format string "%s"',
995
self.checker_command,
996
exc_info=error)
997
return True # Try again later
419
# In case checker_command has exactly one % operator
420
command = self.checker_command % self.host
421
except TypeError:
422
# Escape attributes for the shell
423
escaped_attrs = dict((key,
424
re.escape(unicode(str(val),
425
errors=
426
u'replace')))
427
for key, val in
428
vars(self).iteritems())
429
try:
430
command = self.checker_command % escaped_attrs
431
except TypeError, error:
432
logger.error(u'Could not format string "%s":'
433
u' %s', self.checker_command, error)
434
return True # Try again later
998
435
self.current_checker_command = command
999
logger.info("Starting checker %r for %s", command,
1000
self.name)
1001
# We don't need to redirect stdout and stderr, since
1002
# in normal mode, that is already done by daemon(),
1003
# and in debug mode we don't want to. (Stdin is
1004
# always replaced by /dev/null.)
1005
# The exception is when not debugging but nevertheless
1006
# running in the foreground; use the previously
1007
# created wnull.
1008
popen_args = { "close_fds": True,
1009
"shell": True,
1010
"cwd": "/" }
1011
if (not self.server_settings["debug"]
1012
and self.server_settings["foreground"]):
1013
popen_args.update({"stdout": wnull,
1014
"stderr": wnull })
1015
pipe = multiprocessing.Pipe(duplex = False)
1016
self.checker = multiprocessing.Process(
1017
target = call_pipe,
1018
args = (pipe[1], subprocess.call, command),
1019
kwargs = popen_args)
1020
self.checker.start()
1021
self.checker_callback_tag = gobject.io_add_watch(
1022
pipe[0].fileno(), gobject.IO_IN,
1023
self.checker_callback, pipe[0], command)
436
try:
437
logger.info(u"Starting checker %r for %s",
438
command, self.name)
439
# We don't need to redirect stdout and stderr, since
440
# in normal mode, that is already done by daemon(),
441
# and in debug mode we don't want to. (Stdin is
442
# always replaced by /dev/null.)
443
self.checker = subprocess.Popen(command,
444
close_fds=True,
445
shell=True, cwd=u"/")
446
self.checker_callback_tag = (gobject.child_watch_add
447
(self.checker.pid,
448
self.checker_callback,
449
data=command))
450
# The checker may have completed before the gobject
451
# watch was added. Check for this.
452
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
453
if pid:
454
gobject.source_remove(self.checker_callback_tag)
455
self.checker_callback(pid, status, command)
456
except OSError, error:
457
logger.error(u"Failed to start subprocess: %s",
458
error)
1024
459
# Re-run this periodically if run by gobject.timeout_add
1025
460
return True
1026
461
1029
464
if self.checker_callback_tag:
1030
465
gobject.source_remove(self.checker_callback_tag)
1031
466
self.checker_callback_tag = None
1032
if getattr(self, "checker", None) is None:
467
if getattr(self, u"checker", None) is None:
1033
468
return
1034
logger.debug("Stopping checker for %(name)s", vars(self))
1035
self.checker.terminate()
469
logger.debug(u"Stopping checker for %(name)s", vars(self))
470
try:
471
os.kill(self.checker.pid, signal.SIGTERM)
472
#time.sleep(0.5)
473
#if self.checker.poll() is None:
474
# os.kill(self.checker.pid, signal.SIGKILL)
475
except OSError, error:
476
if error.errno != errno.ESRCH: # No such process
477
raise
1036
478
self.checker = None
1037
479
1038
480
1039
def dbus_service_property(dbus_interface,
1040
signature="v",
1041
access="readwrite",
1042
byte_arrays=False):
481
def dbus_service_property(dbus_interface, signature=u"v",
482
access=u"readwrite", byte_arrays=False):
1043
483
"""Decorators for marking methods of a DBusObjectWithProperties to
1044
484
become properties on the D-Bus.
1045
485
1052
492
"""
1053
493
# Encoding deeply encoded byte arrays is not supported yet by the
1054
494
# "Set" method, so we fail early here:
1055
if byte_arrays and signature != "ay":
1056
raise ValueError("Byte arrays not supported for non-'ay'"
1057
" signature {!r}".format(signature))
1058
495
if byte_arrays and signature != u"ay":
496
raise ValueError(u"Byte arrays not supported for non-'ay'"
497
u" signature %r" % signature)
1059
498
def decorator(func):
1060
499
func._dbus_is_property = True
1061
500
func._dbus_interface = dbus_interface
1062
501
func._dbus_signature = signature
1063
502
func._dbus_access = access
1064
503
func._dbus_name = func.__name__
1065
if func._dbus_name.endswith("_dbus_property"):
504
if func._dbus_name.endswith(u"_dbus_property"):
1066
505
func._dbus_name = func._dbus_name[:-14]
1067
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
1068
return func
1069
1070
return decorator
1071
1072
1073
def dbus_interface_annotations(dbus_interface):
1074
"""Decorator for marking functions returning interface annotations
1075
1076
Usage:
1077
1078
@dbus_interface_annotations("org.example.Interface")
1079
def _foo(self): # Function name does not matter
1080
return {"org.freedesktop.DBus.Deprecated": "true",
1081
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1082
"false"}
1083
"""
1084
1085
def decorator(func):
1086
func._dbus_is_interface = True
1087
func._dbus_interface = dbus_interface
1088
func._dbus_name = dbus_interface
1089
return func
1090
1091
return decorator
1092
1093
1094
def dbus_annotations(annotations):
1095
"""Decorator to annotate D-Bus methods, signals or properties
1096
Usage:
1097
1098
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1099
"org.freedesktop.DBus.Property."
1100
"EmitsChangedSignal": "false"})
1101
@dbus_service_property("org.example.Interface", signature="b",
1102
access="r")
1103
def Property_dbus_property(self):
1104
return dbus.Boolean(False)
1105
1106
See also the DBusObjectWithAnnotations class.
1107
"""
1108
1109
def decorator(func):
1110
func._dbus_annotations = annotations
1111
return func
1112
506
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
507
return func
1113
508
return decorator
1114
509
1115
510
1116
511
class DBusPropertyException(dbus.exceptions.DBusException):
1117
512
"""A base class for D-Bus property-related exceptions
1118
513
"""
1119
pass
514
def __unicode__(self):
515
return unicode(str(self))
1120
516
1121
517
1122
518
class DBusPropertyAccessException(DBusPropertyException):
1131
527
pass
1132
528
1133
529
1134
class DBusObjectWithAnnotations(dbus.service.Object):
1135
"""A D-Bus object with annotations.
1136
1137
Classes inheriting from this can use the dbus_annotations
1138
decorator to add annotations to methods or signals.
1139
"""
1140
1141
@staticmethod
1142
def _is_dbus_thing(thing):
1143
"""Returns a function testing if an attribute is a D-Bus thing
1144
1145
If called like _is_dbus_thing("method") it returns a function
1146
suitable for use as predicate to inspect.getmembers().
1147
"""
1148
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1149
False)
1150
1151
def _get_all_dbus_things(self, thing):
1152
"""Returns a generator of (name, attribute) pairs
1153
"""
1154
return ((getattr(athing.__get__(self), "_dbus_name", name),
1155
athing.__get__(self))
1156
for cls in self.__class__.__mro__
1157
for name, athing in
1158
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1159
1160
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1161
out_signature = "s",
1162
path_keyword = 'object_path',
1163
connection_keyword = 'connection')
1164
def Introspect(self, object_path, connection):
1165
"""Overloading of standard D-Bus method.
1166
1167
Inserts annotation tags on methods and signals.
1168
"""
1169
xmlstring = dbus.service.Object.Introspect(self, object_path,
1170
connection)
1171
try:
1172
document = xml.dom.minidom.parseString(xmlstring)
1173
1174
for if_tag in document.getElementsByTagName("interface"):
1175
# Add annotation tags
1176
for typ in ("method", "signal"):
1177
for tag in if_tag.getElementsByTagName(typ):
1178
annots = dict()
1179
for name, prop in (self.
1180
_get_all_dbus_things(typ)):
1181
if (name == tag.getAttribute("name")
1182
and prop._dbus_interface
1183
== if_tag.getAttribute("name")):
1184
annots.update(getattr(
1185
prop, "_dbus_annotations", {}))
1186
for name, value in annots.items():
1187
ann_tag = document.createElement(
1188
"annotation")
1189
ann_tag.setAttribute("name", name)
1190
ann_tag.setAttribute("value", value)
1191
tag.appendChild(ann_tag)
1192
# Add interface annotation tags
1193
for annotation, value in dict(
1194
itertools.chain.from_iterable(
1195
annotations().items()
1196
for name, annotations
1197
in self._get_all_dbus_things("interface")
1198
if name == if_tag.getAttribute("name")
1199
)).items():
1200
ann_tag = document.createElement("annotation")
1201
ann_tag.setAttribute("name", annotation)
1202
ann_tag.setAttribute("value", value)
1203
if_tag.appendChild(ann_tag)
1204
# Fix argument name for the Introspect method itself
1205
if (if_tag.getAttribute("name")
1206
== dbus.INTROSPECTABLE_IFACE):
1207
for cn in if_tag.getElementsByTagName("method"):
1208
if cn.getAttribute("name") == "Introspect":
1209
for arg in cn.getElementsByTagName("arg"):
1210
if (arg.getAttribute("direction")
1211
== "out"):
1212
arg.setAttribute("name",
1213
"xml_data")
1214
xmlstring = document.toxml("utf-8")
1215
document.unlink()
1216
except (AttributeError, xml.dom.DOMException,
1217
xml.parsers.expat.ExpatError) as error:
1218
logger.error("Failed to override Introspection method",
1219
exc_info=error)
1220
return xmlstring
1221
1222
1223
class DBusObjectWithProperties(DBusObjectWithAnnotations):
530
class DBusObjectWithProperties(dbus.service.Object):
1224
531
"""A D-Bus object with properties.
1225
532
1226
533
Classes inheriting from this can use the dbus_service_property
1227
534
decorator to expose methods as D-Bus properties. It exposes the
1228
535
standard Get(), Set(), and GetAll() methods on the D-Bus.
1229
536
"""
1230
537
538
@staticmethod
539
def _is_dbus_property(obj):
540
return getattr(obj, u"_dbus_is_property", False)
541
542
def _get_all_dbus_properties(self):
543
"""Returns a generator of (name, attribute) pairs
544
"""
545
return ((prop._dbus_name, prop)
546
for name, prop in
547
inspect.getmembers(self, self._is_dbus_property))
548
1231
549
def _get_dbus_property(self, interface_name, property_name):
1232
550
"""Returns a bound method if one exists which is a D-Bus
1233
551
property with the specified name and interface.
1234
552
"""
1235
for cls in self.__class__.__mro__:
1236
for name, value in inspect.getmembers(
1237
cls, self._is_dbus_thing("property")):
1238
if (value._dbus_name == property_name
1239
and value._dbus_interface == interface_name):
1240
return value.__get__(self)
1241
553
for name in (property_name,
554
property_name + u"_dbus_property"):
555
prop = getattr(self, name, None)
556
if (prop is None
557
or not self._is_dbus_property(prop)
558
or prop._dbus_name != property_name
559
or (interface_name and prop._dbus_interface
560
and interface_name != prop._dbus_interface)):
561
continue
562
return prop
1242
563
# No such property
1243
raise DBusPropertyNotFound("{}:{}.{}".format(
1244
self.dbus_object_path, interface_name, property_name))
1245
1246
@classmethod
1247
def _get_all_interface_names(cls):
1248
"""Get a sequence of all interfaces supported by an object"""
1249
return (name for name in set(getattr(getattr(x, attr),
1250
"_dbus_interface", None)
1251
for x in (inspect.getmro(cls))
1252
for attr in dir(x))
1253
if name is not None)
1254
1255
@dbus.service.method(dbus.PROPERTIES_IFACE,
1256
in_signature="ss",
1257
out_signature="v")
564
raise DBusPropertyNotFound(self.dbus_object_path + u":"
565
+ interface_name + u"."
566
+ property_name)
567
568
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
569
out_signature=u"v")
1258
570
def Get(self, interface_name, property_name):
1259
571
"""Standard D-Bus property Get() method, see D-Bus standard.
1260
572
"""
1261
573
prop = self._get_dbus_property(interface_name, property_name)
1262
if prop._dbus_access == "write":
574
if prop._dbus_access == u"write":
1263
575
raise DBusPropertyAccessException(property_name)
1264
576
value = prop()
1265
if not hasattr(value, "variant_level"):
577
if not hasattr(value, u"variant_level"):
1266
578
return value
1267
579
return type(value)(value, variant_level=value.variant_level+1)
1268
580
1269
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
581
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
1270
582
def Set(self, interface_name, property_name, value):
1271
583
"""Standard D-Bus property Set() method, see D-Bus standard.
1272
584
"""
1273
585
prop = self._get_dbus_property(interface_name, property_name)
1274
if prop._dbus_access == "read":
586
if prop._dbus_access == u"read":
1275
587
raise DBusPropertyAccessException(property_name)
1276
if prop._dbus_get_args_options["byte_arrays"]:
588
if prop._dbus_get_args_options[u"byte_arrays"]:
1277
589
# The byte_arrays option is not supported yet on
1278
590
# signatures other than "ay".
1279
if prop._dbus_signature != "ay":
1280
raise ValueError("Byte arrays not supported for non-"
1281
"'ay' signature {!r}"
1282
.format(prop._dbus_signature))
1283
value = dbus.ByteArray(b''.join(chr(byte)
1284
for byte in value))
591
if prop._dbus_signature != u"ay":
592
raise ValueError
593
value = dbus.ByteArray(''.join(unichr(byte)
594
for byte in value))
1285
595
prop(value)
1286
596
1287
@dbus.service.method(dbus.PROPERTIES_IFACE,
1288
in_signature="s",
1289
out_signature="a{sv}")
597
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
598
out_signature=u"a{sv}")
1290
599
def GetAll(self, interface_name):
1291
600
"""Standard D-Bus property GetAll() method, see D-Bus
1292
601
standard.
1293
602
1294
603
Note: Will not include properties with access="write".
1295
604
"""
1296
properties = {}
1297
for name, prop in self._get_all_dbus_things("property"):
605
all = {}
606
for name, prop in self._get_all_dbus_properties():
1298
607
if (interface_name
1299
608
and interface_name != prop._dbus_interface):
1300
609
# Interface non-empty but did not match
1301
610
continue
1302
611
# Ignore write-only properties
1303
if prop._dbus_access == "write":
612
if prop._dbus_access == u"write":
1304
613
continue
1305
614
value = prop()
1306
if not hasattr(value, "variant_level"):
1307
properties[name] = value
615
if not hasattr(value, u"variant_level"):
616
all[name] = value
1308
617
continue
1309
properties[name] = type(value)(
1310
value, variant_level = value.variant_level + 1)
1311
return dbus.Dictionary(properties, signature="sv")
1312
1313
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1314
def PropertiesChanged(self, interface_name, changed_properties,
1315
invalidated_properties):
1316
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1317
standard.
1318
"""
1319
pass
618
all[name] = type(value)(value, variant_level=
619
value.variant_level+1)
620
return dbus.Dictionary(all, signature=u"sv")
1320
621
1321
622
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1322
out_signature="s",
623
out_signature=u"s",
1323
624
path_keyword='object_path',
1324
625
connection_keyword='connection')
1325
626
def Introspect(self, object_path, connection):
1326
"""Overloading of standard D-Bus method.
1327
1328
Inserts property tags and interface annotation tags.
627
"""Standard D-Bus method, overloaded to insert property tags.
1329
628
"""
1330
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1331
object_path,
1332
connection)
629
xmlstring = dbus.service.Object.Introspect(self, object_path,
630
connection)
1333
631
try:
1334
632
document = xml.dom.minidom.parseString(xmlstring)
1335
1336
633
def make_tag(document, name, prop):
1337
e = document.createElement("property")
1338
e.setAttribute("name", name)
1339
e.setAttribute("type", prop._dbus_signature)
1340
e.setAttribute("access", prop._dbus_access)
634
e = document.createElement(u"property")
635
e.setAttribute(u"name", name)
636
e.setAttribute(u"type", prop._dbus_signature)
637
e.setAttribute(u"access", prop._dbus_access)
1341
638
return e
1342
1343
for if_tag in document.getElementsByTagName("interface"):
1344
# Add property tags
639
for if_tag in document.getElementsByTagName(u"interface"):
1345
640
for tag in (make_tag(document, name, prop)
1346
641
for name, prop
1347
in self._get_all_dbus_things("property")
642
in self._get_all_dbus_properties()
1348
643
if prop._dbus_interface
1349
== if_tag.getAttribute("name")):
644
== if_tag.getAttribute(u"name")):
1350
645
if_tag.appendChild(tag)
1351
# Add annotation tags for properties
1352
for tag in if_tag.getElementsByTagName("property"):
1353
annots = dict()
1354
for name, prop in self._get_all_dbus_things(
1355
"property"):
1356
if (name == tag.getAttribute("name")
1357
and prop._dbus_interface
1358
== if_tag.getAttribute("name")):
1359
annots.update(getattr(
1360
prop, "_dbus_annotations", {}))
1361
for name, value in annots.items():
1362
ann_tag = document.createElement(
1363
"annotation")
1364
ann_tag.setAttribute("name", name)
1365
ann_tag.setAttribute("value", value)
1366
tag.appendChild(ann_tag)
1367
646
# Add the names to the return values for the
1368
647
# "org.freedesktop.DBus.Properties" methods
1369
if (if_tag.getAttribute("name")
1370
== "org.freedesktop.DBus.Properties"):
1371
for cn in if_tag.getElementsByTagName("method"):
1372
if cn.getAttribute("name") == "Get":
1373
for arg in cn.getElementsByTagName("arg"):
1374
if (arg.getAttribute("direction")
1375
== "out"):
1376
arg.setAttribute("name", "value")
1377
elif cn.getAttribute("name") == "GetAll":
1378
for arg in cn.getElementsByTagName("arg"):
1379
if (arg.getAttribute("direction")
1380
== "out"):
1381
arg.setAttribute("name", "props")
1382
xmlstring = document.toxml("utf-8")
1383
document.unlink()
1384
except (AttributeError, xml.dom.DOMException,
1385
xml.parsers.expat.ExpatError) as error:
1386
logger.error("Failed to override Introspection method",
1387
exc_info=error)
1388
return xmlstring
1389
1390
try:
1391
dbus.OBJECT_MANAGER_IFACE
1392
except AttributeError:
1393
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1394
1395
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1396
"""A D-Bus object with an ObjectManager.
1397
1398
Classes inheriting from this exposes the standard
1399
GetManagedObjects call and the InterfacesAdded and
1400
InterfacesRemoved signals on the standard
1401
"org.freedesktop.DBus.ObjectManager" interface.
1402
1403
Note: No signals are sent automatically; they must be sent
1404
manually.
1405
"""
1406
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1407
out_signature = "a{oa{sa{sv}}}")
1408
def GetManagedObjects(self):
1409
"""This function must be overridden"""
1410
raise NotImplementedError()
1411
1412
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1413
signature = "oa{sa{sv}}")
1414
def InterfacesAdded(self, object_path, interfaces_and_properties):
1415
pass
1416
1417
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1418
def InterfacesRemoved(self, object_path, interfaces):
1419
pass
1420
1421
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1422
out_signature = "s",
1423
path_keyword = 'object_path',
1424
connection_keyword = 'connection')
1425
def Introspect(self, object_path, connection):
1426
"""Overloading of standard D-Bus method.
1427
1428
Override return argument name of GetManagedObjects to be
1429
"objpath_interfaces_and_properties"
1430
"""
1431
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1432
object_path,
1433
connection)
1434
try:
1435
document = xml.dom.minidom.parseString(xmlstring)
1436
1437
for if_tag in document.getElementsByTagName("interface"):
1438
# Fix argument name for the GetManagedObjects method
1439
if (if_tag.getAttribute("name")
1440
== dbus.OBJECT_MANAGER_IFACE):
1441
for cn in if_tag.getElementsByTagName("method"):
1442
if (cn.getAttribute("name")
1443
== "GetManagedObjects"):
1444
for arg in cn.getElementsByTagName("arg"):
1445
if (arg.getAttribute("direction")
1446
== "out"):
1447
arg.setAttribute(
1448
"name",
1449
"objpath_interfaces"
1450
"_and_properties")
1451
xmlstring = document.toxml("utf-8")
1452
document.unlink()
1453
except (AttributeError, xml.dom.DOMException,
1454
xml.parsers.expat.ExpatError) as error:
1455
logger.error("Failed to override Introspection method",
1456
exc_info = error)
1457
return xmlstring
1458
1459
def datetime_to_dbus(dt, variant_level=0):
1460
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1461
if dt is None:
1462
return dbus.String("", variant_level = variant_level)
1463
return dbus.String(dt.isoformat(), variant_level=variant_level)
1464
1465
1466
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1467
"""A class decorator; applied to a subclass of
1468
dbus.service.Object, it will add alternate D-Bus attributes with
1469
interface names according to the "alt_interface_names" mapping.
1470
Usage:
1471
1472
@alternate_dbus_interfaces({"org.example.Interface":
1473
"net.example.AlternateInterface"})
1474
class SampleDBusObject(dbus.service.Object):
1475
@dbus.service.method("org.example.Interface")
1476
def SampleDBusMethod():
1477
pass
1478
1479
The above "SampleDBusMethod" on "SampleDBusObject" will be
1480
reachable via two interfaces: "org.example.Interface" and
1481
"net.example.AlternateInterface", the latter of which will have
1482
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1483
"true", unless "deprecate" is passed with a False value.
1484
1485
This works for methods and signals, and also for D-Bus properties
1486
(from DBusObjectWithProperties) and interfaces (from the
1487
dbus_interface_annotations decorator).
1488
"""
1489
1490
def wrapper(cls):
1491
for orig_interface_name, alt_interface_name in (
1492
alt_interface_names.items()):
1493
attr = {}
1494
interface_names = set()
1495
# Go though all attributes of the class
1496
for attrname, attribute in inspect.getmembers(cls):
1497
# Ignore non-D-Bus attributes, and D-Bus attributes
1498
# with the wrong interface name
1499
if (not hasattr(attribute, "_dbus_interface")
1500
or not attribute._dbus_interface.startswith(
1501
orig_interface_name)):
1502
continue
1503
# Create an alternate D-Bus interface name based on
1504
# the current name
1505
alt_interface = attribute._dbus_interface.replace(
1506
orig_interface_name, alt_interface_name)
1507
interface_names.add(alt_interface)
1508
# Is this a D-Bus signal?
1509
if getattr(attribute, "_dbus_is_signal", False):
1510
if sys.version_info.major == 2:
1511
# Extract the original non-method undecorated
1512
# function by black magic
1513
nonmethod_func = (dict(
1514
zip(attribute.func_code.co_freevars,
1515
attribute.__closure__))
1516
["func"].cell_contents)
1517
else:
1518
nonmethod_func = attribute
1519
# Create a new, but exactly alike, function
1520
# object, and decorate it to be a new D-Bus signal
1521
# with the alternate D-Bus interface name
1522
if sys.version_info.major == 2:
1523
new_function = types.FunctionType(
1524
nonmethod_func.func_code,
1525
nonmethod_func.func_globals,
1526
nonmethod_func.func_name,
1527
nonmethod_func.func_defaults,
1528
nonmethod_func.func_closure)
1529
else:
1530
new_function = types.FunctionType(
1531
nonmethod_func.__code__,
1532
nonmethod_func.__globals__,
1533
nonmethod_func.__name__,
1534
nonmethod_func.__defaults__,
1535
nonmethod_func.__closure__)
1536
new_function = (dbus.service.signal(
1537
alt_interface,
1538
attribute._dbus_signature)(new_function))
1539
# Copy annotations, if any
1540
try:
1541
new_function._dbus_annotations = dict(
1542
attribute._dbus_annotations)
1543
except AttributeError:
1544
pass
1545
# Define a creator of a function to call both the
1546
# original and alternate functions, so both the
1547
# original and alternate signals gets sent when
1548
# the function is called
1549
def fixscope(func1, func2):
1550
"""This function is a scope container to pass
1551
func1 and func2 to the "call_both" function
1552
outside of its arguments"""
1553
1554
@functools.wraps(func2)
1555
def call_both(*args, **kwargs):
1556
"""This function will emit two D-Bus
1557
signals by calling func1 and func2"""
1558
func1(*args, **kwargs)
1559
func2(*args, **kwargs)
1560
# Make wrapper function look like a D-Bus signal
1561
for name, attr in inspect.getmembers(func2):
1562
if name.startswith("_dbus_"):
1563
setattr(call_both, name, attr)
1564
1565
return call_both
1566
# Create the "call_both" function and add it to
1567
# the class
1568
attr[attrname] = fixscope(attribute, new_function)
1569
# Is this a D-Bus method?
1570
elif getattr(attribute, "_dbus_is_method", False):
1571
# Create a new, but exactly alike, function
1572
# object. Decorate it to be a new D-Bus method
1573
# with the alternate D-Bus interface name. Add it
1574
# to the class.
1575
attr[attrname] = (
1576
dbus.service.method(
1577
alt_interface,
1578
attribute._dbus_in_signature,
1579
attribute._dbus_out_signature)
1580
(types.FunctionType(attribute.func_code,
1581
attribute.func_globals,
1582
attribute.func_name,
1583
attribute.func_defaults,
1584
attribute.func_closure)))
1585
# Copy annotations, if any
1586
try:
1587
attr[attrname]._dbus_annotations = dict(
1588
attribute._dbus_annotations)
1589
except AttributeError:
1590
pass
1591
# Is this a D-Bus property?
1592
elif getattr(attribute, "_dbus_is_property", False):
1593
# Create a new, but exactly alike, function
1594
# object, and decorate it to be a new D-Bus
1595
# property with the alternate D-Bus interface
1596
# name. Add it to the class.
1597
attr[attrname] = (dbus_service_property(
1598
alt_interface, attribute._dbus_signature,
1599
attribute._dbus_access,
1600
attribute._dbus_get_args_options
1601
["byte_arrays"])
1602
(types.FunctionType(
1603
attribute.func_code,
1604
attribute.func_globals,
1605
attribute.func_name,
1606
attribute.func_defaults,
1607
attribute.func_closure)))
1608
# Copy annotations, if any
1609
try:
1610
attr[attrname]._dbus_annotations = dict(
1611
attribute._dbus_annotations)
1612
except AttributeError:
1613
pass
1614
# Is this a D-Bus interface?
1615
elif getattr(attribute, "_dbus_is_interface", False):
1616
# Create a new, but exactly alike, function
1617
# object. Decorate it to be a new D-Bus interface
1618
# with the alternate D-Bus interface name. Add it
1619
# to the class.
1620
attr[attrname] = (
1621
dbus_interface_annotations(alt_interface)
1622
(types.FunctionType(attribute.func_code,
1623
attribute.func_globals,
1624
attribute.func_name,
1625
attribute.func_defaults,
1626
attribute.func_closure)))
1627
if deprecate:
1628
# Deprecate all alternate interfaces
1629
iname="_AlternateDBusNames_interface_annotation{}"
1630
for interface_name in interface_names:
1631
1632
@dbus_interface_annotations(interface_name)
1633
def func(self):
1634
return { "org.freedesktop.DBus.Deprecated":
1635
"true" }
1636
# Find an unused name
1637
for aname in (iname.format(i)
1638
for i in itertools.count()):
1639
if aname not in attr:
1640
attr[aname] = func
1641
break
1642
if interface_names:
1643
# Replace the class with a new subclass of it with
1644
# methods, signals, etc. as created above.
1645
cls = type(b"{}Alternate".format(cls.__name__),
1646
(cls, ), attr)
1647
return cls
1648
1649
return wrapper
1650
1651
1652
@alternate_dbus_interfaces({"se.recompile.Mandos":
1653
"se.bsnet.fukt.Mandos"})
648
if (if_tag.getAttribute(u"name")
649
== u"org.freedesktop.DBus.Properties"):
650
for cn in if_tag.getElementsByTagName(u"method"):
651
if cn.getAttribute(u"name") == u"Get":
652
for arg in cn.getElementsByTagName(u"arg"):
653
if (arg.getAttribute(u"direction")
654
== u"out"):
655
arg.setAttribute(u"name", u"value")
656
elif cn.getAttribute(u"name") == u"GetAll":
657
for arg in cn.getElementsByTagName(u"arg"):
658
if (arg.getAttribute(u"direction")
659
== u"out"):
660
arg.setAttribute(u"name", u"props")
661
xmlstring = document.toxml(u"utf-8")
662
document.unlink()
663
except (AttributeError, xml.dom.DOMException,
664
xml.parsers.expat.ExpatError), error:
665
logger.error(u"Failed to override Introspection method",
666
error)
667
return xmlstring
668
669
1654
670
class ClientDBus(Client, DBusObjectWithProperties):
1655
671
"""A Client class using D-Bus
1656
672
1658
674
dbus_object_path: dbus.ObjectPath
1659
675
bus: dbus.SystemBus()
1660
676
"""
1661
1662
runtime_expansions = (Client.runtime_expansions
1663
+ ("dbus_object_path", ))
1664
1665
_interface = "se.recompile.Mandos.Client"
1666
1667
677
# dbus.service.Object doesn't use super(), so we can't either.
1668
678
1669
679
def __init__(self, bus = None, *args, **kwargs):
1671
681
Client.__init__(self, *args, **kwargs)
1672
682
# Only now, when this client is initialized, can it show up on
1673
683
# the D-Bus
1674
client_object_name = str(self.name).translate(
1675
{ord("."): ord("_"),
1676
ord("-"): ord("_")})
1677
self.dbus_object_path = dbus.ObjectPath(
1678
"/clients/" + client_object_name)
684
self.dbus_object_path = (dbus.ObjectPath
685
(u"/clients/"
686
+ self.name.replace(u".", u"_")))
1679
687
DBusObjectWithProperties.__init__(self, self.bus,
1680
688
self.dbus_object_path)
1681
689
1682
def notifychangeproperty(transform_func, dbus_name,
1683
type_func=lambda x: x,
1684
variant_level=1,
1685
invalidate_only=False,
1686
_interface=_interface):
1687
""" Modify a variable so that it's a property which announces
1688
its changes to DBus.
1689
1690
transform_fun: Function that takes a value and a variant_level
1691
and transforms it to a D-Bus type.
1692
dbus_name: D-Bus name of the variable
1693
type_func: Function that transform the value before sending it
1694
to the D-Bus. Default: no transform
1695
variant_level: D-Bus variant level. Default: 1
1696
"""
1697
attrname = "_{}".format(dbus_name)
1698
1699
def setter(self, value):
1700
if hasattr(self, "dbus_object_path"):
1701
if (not hasattr(self, attrname) or
1702
type_func(getattr(self, attrname, None))
1703
!= type_func(value)):
1704
if invalidate_only:
1705
self.PropertiesChanged(
1706
_interface, dbus.Dictionary(),
1707
dbus.Array((dbus_name, )))
1708
else:
1709
dbus_value = transform_func(
1710
type_func(value),
1711
variant_level = variant_level)
1712
self.PropertyChanged(dbus.String(dbus_name),
1713
dbus_value)
1714
self.PropertiesChanged(
1715
_interface,
1716
dbus.Dictionary({ dbus.String(dbus_name):
1717
dbus_value }),
1718
dbus.Array())
1719
setattr(self, attrname, value)
1720
1721
return property(lambda self: getattr(self, attrname), setter)
1722
1723
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1724
approvals_pending = notifychangeproperty(dbus.Boolean,
1725
"ApprovalPending",
1726
type_func = bool)
1727
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1728
last_enabled = notifychangeproperty(datetime_to_dbus,
1729
"LastEnabled")
1730
checker = notifychangeproperty(
1731
dbus.Boolean, "CheckerRunning",
1732
type_func = lambda checker: checker is not None)
1733
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1734
"LastCheckedOK")
1735
last_checker_status = notifychangeproperty(dbus.Int16,
1736
"LastCheckerStatus")
1737
last_approval_request = notifychangeproperty(
1738
datetime_to_dbus, "LastApprovalRequest")
1739
approved_by_default = notifychangeproperty(dbus.Boolean,
1740
"ApprovedByDefault")
1741
approval_delay = notifychangeproperty(
1742
dbus.UInt64, "ApprovalDelay",
1743
type_func = lambda td: td.total_seconds() * 1000)
1744
approval_duration = notifychangeproperty(
1745
dbus.UInt64, "ApprovalDuration",
1746
type_func = lambda td: td.total_seconds() * 1000)
1747
host = notifychangeproperty(dbus.String, "Host")
1748
timeout = notifychangeproperty(
1749
dbus.UInt64, "Timeout",
1750
type_func = lambda td: td.total_seconds() * 1000)
1751
extended_timeout = notifychangeproperty(
1752
dbus.UInt64, "ExtendedTimeout",
1753
type_func = lambda td: td.total_seconds() * 1000)
1754
interval = notifychangeproperty(
1755
dbus.UInt64, "Interval",
1756
type_func = lambda td: td.total_seconds() * 1000)
1757
checker_command = notifychangeproperty(dbus.String, "Checker")
1758
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1759
invalidate_only=True)
1760
1761
del notifychangeproperty
690
@staticmethod
691
def _datetime_to_dbus(dt, variant_level=0):
692
"""Convert a UTC datetime.datetime() to a D-Bus type."""
693
return dbus.String(dt.isoformat(),
694
variant_level=variant_level)
695
696
def enable(self):
697
oldstate = getattr(self, u"enabled", False)
698
r = Client.enable(self)
699
if oldstate != self.enabled:
700
# Emit D-Bus signals
701
self.PropertyChanged(dbus.String(u"enabled"),
702
dbus.Boolean(True, variant_level=1))
703
self.PropertyChanged(
704
dbus.String(u"last_enabled"),
705
self._datetime_to_dbus(self.last_enabled,
706
variant_level=1))
707
return r
708
709
def disable(self, quiet = False):
710
oldstate = getattr(self, u"enabled", False)
711
r = Client.disable(self, quiet=quiet)
712
if not quiet and oldstate != self.enabled:
713
# Emit D-Bus signal
714
self.PropertyChanged(dbus.String(u"enabled"),
715
dbus.Boolean(False, variant_level=1))
716
return r
1762
717
1763
718
def __del__(self, *args, **kwargs):
1764
719
try:
1765
720
self.remove_from_connection()
1766
721
except LookupError:
1767
722
pass
1768
if hasattr(DBusObjectWithProperties, "__del__"):
723
if hasattr(DBusObjectWithProperties, u"__del__"):
1769
724
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1770
725
Client.__del__(self, *args, **kwargs)
1771
726
1772
def checker_callback(self, source, condition,
1773
connection, command, *args, **kwargs):
1774
ret = Client.checker_callback(self, source, condition,
1775
connection, command, *args,
1776
**kwargs)
1777
exitstatus = self.last_checker_status
1778
if exitstatus >= 0:
727
def checker_callback(self, pid, condition, command,
728
*args, **kwargs):
729
self.checker_callback_tag = None
730
self.checker = None
731
# Emit D-Bus signal
732
self.PropertyChanged(dbus.String(u"checker_running"),
733
dbus.Boolean(False, variant_level=1))
734
if os.WIFEXITED(condition):
735
exitstatus = os.WEXITSTATUS(condition)
1779
736
# Emit D-Bus signal
1780
737
self.CheckerCompleted(dbus.Int16(exitstatus),
1781
# This is specific to GNU libC
1782
dbus.Int64(exitstatus << 8),
738
dbus.Int64(condition),
1783
739
dbus.String(command))
1784
740
else:
1785
741
# Emit D-Bus signal
1786
742
self.CheckerCompleted(dbus.Int16(-1),
1787
dbus.Int64(
1788
# This is specific to GNU libC
1789
(exitstatus << 8)
1790
| self.last_checker_signal),
743
dbus.Int64(condition),
1791
744
dbus.String(command))
1792
return ret
745
746
return Client.checker_callback(self, pid, condition, command,
747
*args, **kwargs)
748
749
def checked_ok(self, *args, **kwargs):
750
r = Client.checked_ok(self, *args, **kwargs)
751
# Emit D-Bus signal
752
self.PropertyChanged(
753
dbus.String(u"last_checked_ok"),
754
(self._datetime_to_dbus(self.last_checked_ok,
755
variant_level=1)))
756
return r
1793
757
1794
758
def start_checker(self, *args, **kwargs):
1795
old_checker_pid = getattr(self.checker, "pid", None)
759
old_checker = self.checker
760
if self.checker is not None:
761
old_checker_pid = self.checker.pid
762
else:
763
old_checker_pid = None
1796
764
r = Client.start_checker(self, *args, **kwargs)
1797
765
# Only if new checker process was started
1798
766
if (self.checker is not None
1799
767
and old_checker_pid != self.checker.pid):
1800
768
# Emit D-Bus signal
1801
769
self.CheckerStarted(self.current_checker_command)
1802
return r
1803
1804
def _reset_approved(self):
1805
self.approved = None
1806
return False
1807
1808
def approve(self, value=True):
1809
self.approved = value
1810
gobject.timeout_add(int(self.approval_duration.total_seconds()
1811
* 1000), self._reset_approved)
1812
self.send_changedstate()
770
self.PropertyChanged(
771
dbus.String(u"checker_running"),
772
dbus.Boolean(True, variant_level=1))
773
return r
774
775
def stop_checker(self, *args, **kwargs):
776
old_checker = getattr(self, u"checker", None)
777
r = Client.stop_checker(self, *args, **kwargs)
778
if (old_checker is not None
779
and getattr(self, u"checker", None) is None):
780
self.PropertyChanged(dbus.String(u"checker_running"),
781
dbus.Boolean(False, variant_level=1))
782
return r
1813
783
1814
784
## D-Bus methods, signals & properties
1815
1816
## Interfaces
785
_interface = u"se.bsnet.fukt.Mandos.Client"
1817
786
1818
787
## Signals
1819
788
1820
789
# CheckerCompleted - signal
1821
@dbus.service.signal(_interface, signature="nxs")
790
@dbus.service.signal(_interface, signature=u"nxs")
1822
791
def CheckerCompleted(self, exitcode, waitstatus, command):
1823
792
"D-Bus signal"
1824
793
pass
1825
794
1826
795
# CheckerStarted - signal
1827
@dbus.service.signal(_interface, signature="s")
796
@dbus.service.signal(_interface, signature=u"s")
1828
797
def CheckerStarted(self, command):
1829
798
"D-Bus signal"
1830
799
pass
1831
800
1832
801
# PropertyChanged - signal
1833
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1834
@dbus.service.signal(_interface, signature="sv")
802
@dbus.service.signal(_interface, signature=u"sv")
1835
803
def PropertyChanged(self, property, value):
1836
804
"D-Bus signal"
1837
805
pass
1839
807
# GotSecret - signal
1840
808
@dbus.service.signal(_interface)
1841
809
def GotSecret(self):
1842
"""D-Bus signal
1843
Is sent after a successful transfer of secret from the Mandos
1844
server to mandos-client
1845
"""
810
"D-Bus signal"
1846
811
pass
1847
812
1848
813
# Rejected - signal
1849
@dbus.service.signal(_interface, signature="s")
1850
def Rejected(self, reason):
814
@dbus.service.signal(_interface)
815
def Rejected(self):
1851
816
"D-Bus signal"
1852
817
pass
1853
818
1854
# NeedApproval - signal
1855
@dbus.service.signal(_interface, signature="tb")
1856
def NeedApproval(self, timeout, default):
1857
"D-Bus signal"
1858
return self.need_approval()
1859
1860
819
## Methods
1861
820
1862
# Approve - method
1863
@dbus.service.method(_interface, in_signature="b")
1864
def Approve(self, value):
1865
self.approve(value)
1866
1867
821
# CheckedOK - method
1868
822
@dbus.service.method(_interface)
1869
823
def CheckedOK(self):
1870
self.checked_ok()
824
return self.checked_ok()
1871
825
1872
826
# Enable - method
1873
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1874
827
@dbus.service.method(_interface)
1875
828
def Enable(self):
1876
829
"D-Bus method"
1877
830
self.enable()
1878
831
1879
832
# StartChecker - method
1880
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1881
833
@dbus.service.method(_interface)
1882
834
def StartChecker(self):
1883
835
"D-Bus method"
1884
836
self.start_checker()
1885
837
1886
838
# Disable - method
1887
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1888
839
@dbus.service.method(_interface)
1889
840
def Disable(self):
1890
841
"D-Bus method"
1891
842
self.disable()
1892
843
1893
844
# StopChecker - method
1894
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1895
845
@dbus.service.method(_interface)
1896
846
def StopChecker(self):
1897
847
self.stop_checker()
1898
848
1899
849
## Properties
1900
850
1901
# ApprovalPending - property
1902
@dbus_service_property(_interface, signature="b", access="read")
1903
def ApprovalPending_dbus_property(self):
1904
return dbus.Boolean(bool(self.approvals_pending))
1905
1906
# ApprovedByDefault - property
1907
@dbus_service_property(_interface,
1908
signature="b",
1909
access="readwrite")
1910
def ApprovedByDefault_dbus_property(self, value=None):
1911
if value is None: # get
1912
return dbus.Boolean(self.approved_by_default)
1913
self.approved_by_default = bool(value)
1914
1915
# ApprovalDelay - property
1916
@dbus_service_property(_interface,
1917
signature="t",
1918
access="readwrite")
1919
def ApprovalDelay_dbus_property(self, value=None):
1920
if value is None: # get
1921
return dbus.UInt64(self.approval_delay.total_seconds()
1922
* 1000)
1923
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1924
1925
# ApprovalDuration - property
1926
@dbus_service_property(_interface,
1927
signature="t",
1928
access="readwrite")
1929
def ApprovalDuration_dbus_property(self, value=None):
1930
if value is None: # get
1931
return dbus.UInt64(self.approval_duration.total_seconds()
1932
* 1000)
1933
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1934
1935
# Name - property
1936
@dbus_annotations(
1937
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1938
@dbus_service_property(_interface, signature="s", access="read")
1939
def Name_dbus_property(self):
851
# name - property
852
@dbus_service_property(_interface, signature=u"s", access=u"read")
853
def name_dbus_property(self):
1940
854
return dbus.String(self.name)
1941
855
1942
# Fingerprint - property
1943
@dbus_annotations(
1944
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1945
@dbus_service_property(_interface, signature="s", access="read")
1946
def Fingerprint_dbus_property(self):
856
# fingerprint - property
857
@dbus_service_property(_interface, signature=u"s", access=u"read")
858
def fingerprint_dbus_property(self):
1947
859
return dbus.String(self.fingerprint)
1948
860
1949
# Host - property
1950
@dbus_service_property(_interface,
1951
signature="s",
1952
access="readwrite")
1953
def Host_dbus_property(self, value=None):
861
# host - property
862
@dbus_service_property(_interface, signature=u"s",
863
access=u"readwrite")
864
def host_dbus_property(self, value=None):
1954
865
if value is None: # get
1955
866
return dbus.String(self.host)
1956
self.host = str(value)
1957
1958
# Created - property
1959
@dbus_annotations(
1960
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1961
@dbus_service_property(_interface, signature="s", access="read")
1962
def Created_dbus_property(self):
1963
return datetime_to_dbus(self.created)
1964
1965
# LastEnabled - property
1966
@dbus_service_property(_interface, signature="s", access="read")
1967
def LastEnabled_dbus_property(self):
1968
return datetime_to_dbus(self.last_enabled)
1969
1970
# Enabled - property
1971
@dbus_service_property(_interface,
1972
signature="b",
1973
access="readwrite")
1974
def Enabled_dbus_property(self, value=None):
867
self.host = value
868
# Emit D-Bus signal
869
self.PropertyChanged(dbus.String(u"host"),
870
dbus.String(value, variant_level=1))
871
872
# created - property
873
@dbus_service_property(_interface, signature=u"s", access=u"read")
874
def created_dbus_property(self):
875
return dbus.String(self._datetime_to_dbus(self.created))
876
877
# last_enabled - property
878
@dbus_service_property(_interface, signature=u"s", access=u"read")
879
def last_enabled_dbus_property(self):
880
if self.last_enabled is None:
881
return dbus.String(u"")
882
return dbus.String(self._datetime_to_dbus(self.last_enabled))
883
884
# enabled - property
885
@dbus_service_property(_interface, signature=u"b",
886
access=u"readwrite")
887
def enabled_dbus_property(self, value=None):
1975
888
if value is None: # get
1976
889
return dbus.Boolean(self.enabled)
1977
890
if value:
1979
892
else:
1980
893
self.disable()
1981
894
1982
# LastCheckedOK - property
1983
@dbus_service_property(_interface,
1984
signature="s",
1985
access="readwrite")
1986
def LastCheckedOK_dbus_property(self, value=None):
895
# last_checked_ok - property
896
@dbus_service_property(_interface, signature=u"s",
897
access=u"readwrite")
898
def last_checked_ok_dbus_property(self, value=None):
1987
899
if value is not None:
1988
900
self.checked_ok()
1989
901
return
1990
return datetime_to_dbus(self.last_checked_ok)
1991
1992
# LastCheckerStatus - property
1993
@dbus_service_property(_interface, signature="n", access="read")
1994
def LastCheckerStatus_dbus_property(self):
1995
return dbus.Int16(self.last_checker_status)
1996
1997
# Expires - property
1998
@dbus_service_property(_interface, signature="s", access="read")
1999
def Expires_dbus_property(self):
2000
return datetime_to_dbus(self.expires)
2001
2002
# LastApprovalRequest - property
2003
@dbus_service_property(_interface, signature="s", access="read")
2004
def LastApprovalRequest_dbus_property(self):
2005
return datetime_to_dbus(self.last_approval_request)
2006
2007
# Timeout - property
2008
@dbus_service_property(_interface,
2009
signature="t",
2010
access="readwrite")
2011
def Timeout_dbus_property(self, value=None):
902
if self.last_checked_ok is None:
903
return dbus.String(u"")
904
return dbus.String(self._datetime_to_dbus(self
905
.last_checked_ok))
906
907
# timeout - property
908
@dbus_service_property(_interface, signature=u"t",
909
access=u"readwrite")
910
def timeout_dbus_property(self, value=None):
2012
911
if value is None: # get
2013
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2014
old_timeout = self.timeout
912
return dbus.UInt64(self.timeout_milliseconds())
2015
913
self.timeout = datetime.timedelta(0, 0, 0, value)
2016
# Reschedule disabling
2017
if self.enabled:
2018
now = datetime.datetime.utcnow()
2019
self.expires += self.timeout - old_timeout
2020
if self.expires <= now:
2021
# The timeout has passed
2022
self.disable()
2023
else:
2024
if (getattr(self, "disable_initiator_tag", None)
2025
is None):
2026
return
2027
gobject.source_remove(self.disable_initiator_tag)
2028
self.disable_initiator_tag = gobject.timeout_add(
2029
int((self.expires - now).total_seconds() * 1000),
2030
self.disable)
2031
2032
# ExtendedTimeout - property
2033
@dbus_service_property(_interface,
2034
signature="t",
2035
access="readwrite")
2036
def ExtendedTimeout_dbus_property(self, value=None):
2037
if value is None: # get
2038
return dbus.UInt64(self.extended_timeout.total_seconds()
2039
* 1000)
2040
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2041
2042
# Interval - property
2043
@dbus_service_property(_interface,
2044
signature="t",
2045
access="readwrite")
2046
def Interval_dbus_property(self, value=None):
2047
if value is None: # get
2048
return dbus.UInt64(self.interval.total_seconds() * 1000)
914
# Emit D-Bus signal
915
self.PropertyChanged(dbus.String(u"timeout"),
916
dbus.UInt64(value, variant_level=1))
917
if getattr(self, u"disable_initiator_tag", None) is None:
918
return
919
# Reschedule timeout
920
gobject.source_remove(self.disable_initiator_tag)
921
self.disable_initiator_tag = None
922
time_to_die = (self.
923
_timedelta_to_milliseconds((self
924
.last_checked_ok
925
+ self.timeout)
926
- datetime.datetime
927
.utcnow()))
928
if time_to_die <= 0:
929
# The timeout has passed
930
self.disable()
931
else:
932
self.disable_initiator_tag = (gobject.timeout_add
933
(time_to_die, self.disable))
934
935
# interval - property
936
@dbus_service_property(_interface, signature=u"t",
937
access=u"readwrite")
938
def interval_dbus_property(self, value=None):
939
if value is None: # get
940
return dbus.UInt64(self.interval_milliseconds())
2049
941
self.interval = datetime.timedelta(0, 0, 0, value)
2050
if getattr(self, "checker_initiator_tag", None) is None:
942
# Emit D-Bus signal
943
self.PropertyChanged(dbus.String(u"interval"),
944
dbus.UInt64(value, variant_level=1))
945
if getattr(self, u"checker_initiator_tag", None) is None:
2051
946
return
2052
if self.enabled:
2053
# Reschedule checker run
2054
gobject.source_remove(self.checker_initiator_tag)
2055
self.checker_initiator_tag = gobject.timeout_add(
2056
value, self.start_checker)
2057
self.start_checker() # Start one now, too
2058
2059
# Checker - property
2060
@dbus_service_property(_interface,
2061
signature="s",
2062
access="readwrite")
2063
def Checker_dbus_property(self, value=None):
947
# Reschedule checker run
948
gobject.source_remove(self.checker_initiator_tag)
949
self.checker_initiator_tag = (gobject.timeout_add
950
(value, self.start_checker))
951
self.start_checker() # Start one now, too
952
953
# checker - property
954
@dbus_service_property(_interface, signature=u"s",
955
access=u"readwrite")
956
def checker_dbus_property(self, value=None):
2064
957
if value is None: # get
2065
958
return dbus.String(self.checker_command)
2066
self.checker_command = str(value)
959
self.checker_command = value
960
# Emit D-Bus signal
961
self.PropertyChanged(dbus.String(u"checker"),
962
dbus.String(self.checker_command,
963
variant_level=1))
2067
964
2068
# CheckerRunning - property
2069
@dbus_service_property(_interface,
2070
signature="b",
2071
access="readwrite")
2072
def CheckerRunning_dbus_property(self, value=None):
965
# checker_running - property
966
@dbus_service_property(_interface, signature=u"b",
967
access=u"readwrite")
968
def checker_running_dbus_property(self, value=None):
2073
969
if value is None: # get
2074
970
return dbus.Boolean(self.checker is not None)
2075
971
if value:
2077
973
else:
2078
974
self.stop_checker()
2079
975
2080
# ObjectPath - property
2081
@dbus_annotations(
2082
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2083
"org.freedesktop.DBus.Deprecated": "true"})
2084
@dbus_service_property(_interface, signature="o", access="read")
2085
def ObjectPath_dbus_property(self):
976
# object_path - property
977
@dbus_service_property(_interface, signature=u"o", access=u"read")
978
def object_path_dbus_property(self):
2086
979
return self.dbus_object_path # is already a dbus.ObjectPath
2087
980
2088
# Secret = property
2089
@dbus_annotations(
2090
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2091
"invalidates"})
2092
@dbus_service_property(_interface,
2093
signature="ay",
2094
access="write",
2095
byte_arrays=True)
2096
def Secret_dbus_property(self, value):
2097
self.secret = bytes(value)
981
# secret = property
982
@dbus_service_property(_interface, signature=u"ay",
983
access=u"write", byte_arrays=True)
984
def secret_dbus_property(self, value):
985
self.secret = str(value)
2098
986
2099
987
del _interface
2100
988
2101
989
2102
class ProxyClient(object):
2103
def __init__(self, child_pipe, fpr, address):
2104
self._pipe = child_pipe
2105
self._pipe.send(('init', fpr, address))
2106
if not self._pipe.recv():
2107
raise KeyError(fpr)
2108
2109
def __getattribute__(self, name):
2110
if name == '_pipe':
2111
return super(ProxyClient, self).__getattribute__(name)
2112
self._pipe.send(('getattr', name))
2113
data = self._pipe.recv()
2114
if data[0] == 'data':
2115
return data[1]
2116
if data[0] == 'function':
2117
2118
def func(*args, **kwargs):
2119
self._pipe.send(('funcall', name, args, kwargs))
2120
return self._pipe.recv()[1]
2121
2122
return func
2123
2124
def __setattr__(self, name, value):
2125
if name == '_pipe':
2126
return super(ProxyClient, self).__setattr__(name, value)
2127
self._pipe.send(('setattr', name, value))
2128
2129
2130
990
class ClientHandler(socketserver.BaseRequestHandler, object):
2131
991
"""A class to handle client connections.
2132
992
2134
994
Note: This will run in its own forked process."""
2135
995
2136
996
def handle(self):
2137
with contextlib.closing(self.server.child_pipe) as child_pipe:
2138
logger.info("TCP connection from: %s",
2139
str(self.client_address))
2140
logger.debug("Pipe FD: %d",
2141
self.server.child_pipe.fileno())
2142
2143
session = gnutls.ClientSession(self.request)
2144
2145
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
2146
# "+AES-256-CBC", "+SHA1",
2147
# "+COMP-NULL", "+CTYPE-OPENPGP",
2148
# "+DHE-DSS"))
997
logger.info(u"TCP connection from: %s",
998
unicode(self.client_address))
999
logger.debug(u"IPC Pipe FD: %d",
1000
self.server.child_pipe[1].fileno())
1001
# Open IPC pipe to parent process
1002
with contextlib.nested(self.server.child_pipe[1],
1003
self.server.parent_pipe[0]
1004
) as (ipc, ipc_return):
1005
session = (gnutls.connection
1006
.ClientSession(self.request,
1007
gnutls.connection
1008
.X509Credentials()))
1009
1010
# Note: gnutls.connection.X509Credentials is really a
1011
# generic GnuTLS certificate credentials object so long as
1012
# no X.509 keys are added to it. Therefore, we can use it
1013
# here despite using OpenPGP certificates.
1014
1015
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1016
# u"+AES-256-CBC", u"+SHA1",
1017
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1018
# u"+DHE-DSS"))
2149
1019
# Use a fallback default, since this MUST be set.
2150
1020
priority = self.server.gnutls_priority
2151
1021
if priority is None:
2152
priority = "NORMAL"
2153
gnutls.priority_set_direct(session._c_object, priority,
2154
None)
1022
priority = u"NORMAL"
1023
(gnutls.library.functions
1024
.gnutls_priority_set_direct(session._c_object,
1025
priority, None))
2155
1026
2156
1027
# Start communication using the Mandos protocol
2157
1028
# Get protocol number
2158
1029
line = self.request.makefile().readline()
2159
logger.debug("Protocol version: %r", line)
1030
logger.debug(u"Protocol version: %r", line)
2160
1031
try:
2161
1032
if int(line.strip().split()[0]) > 1:
2162
raise RuntimeError(line)
2163
except (ValueError, IndexError, RuntimeError) as error:
2164
logger.error("Unknown protocol version: %s", error)
1033
raise RuntimeError
1034
except (ValueError, IndexError, RuntimeError), error:
1035
logger.error(u"Unknown protocol version: %s", error)
2165
1036
return
2166
1037
2167
1038
# Start GnuTLS connection
2168
1039
try:
2169
1040
session.handshake()
2170
except gnutls.Error as error:
2171
logger.warning("Handshake failed: %s", error)
1041
except gnutls.errors.GNUTLSError, error:
1042
logger.warning(u"Handshake failed: %s", error)
2172
1043
# Do not run session.bye() here: the session is not
2173
1044
# established. Just abandon the request.
2174
1045
return
2175
logger.debug("Handshake succeeded")
2176
2177
approval_required = False
1046
logger.debug(u"Handshake succeeded")
2178
1047
try:
2179
1048
try:
2180
fpr = self.fingerprint(
2181
self.peer_certificate(session))
2182
except (TypeError, gnutls.Error) as error:
2183
logger.warning("Bad certificate: %s", error)
2184
return
2185
logger.debug("Fingerprint: %s", fpr)
2186
2187
try:
2188
client = ProxyClient(child_pipe, fpr,
2189
self.client_address)
2190
except KeyError:
2191
return
2192
2193
if client.approval_delay:
2194
delay = client.approval_delay
2195
client.approvals_pending += 1
2196
approval_required = True
2197
2198
while True:
2199
if not client.enabled:
2200
logger.info("Client %s is disabled",
2201
client.name)
2202
if self.server.use_dbus:
2203
# Emit D-Bus signal
2204
client.Rejected("Disabled")
2205
return
2206
2207
if client.approved or not client.approval_delay:
2208
#We are approved or approval is disabled
1049
fpr = self.fingerprint(self.peer_certificate
1050
(session))
1051
except (TypeError, gnutls.errors.GNUTLSError), error:
1052
logger.warning(u"Bad certificate: %s", error)
1053
return
1054
logger.debug(u"Fingerprint: %s", fpr)
1055
1056
for c in self.server.clients:
1057
if c.fingerprint == fpr:
1058
client = c
2209
1059
break
2210
elif client.approved is None:
2211
logger.info("Client %s needs approval",
2212
client.name)
2213
if self.server.use_dbus:
2214
# Emit D-Bus signal
2215
client.NeedApproval(
2216
client.approval_delay.total_seconds()
2217
* 1000, client.approved_by_default)
2218
else:
2219
logger.warning("Client %s was not approved",
2220
client.name)
2221
if self.server.use_dbus:
2222
# Emit D-Bus signal
2223
client.Rejected("Denied")
2224
return
2225
2226
#wait until timeout or approved
2227
time = datetime.datetime.now()
2228
client.changedstate.acquire()
2229
client.changedstate.wait(delay.total_seconds())
2230
client.changedstate.release()
2231
time2 = datetime.datetime.now()
2232
if (time2 - time) >= delay:
2233
if not client.approved_by_default:
2234
logger.warning("Client %s timed out while"
2235
" waiting for approval",
2236
client.name)
2237
if self.server.use_dbus:
2238
# Emit D-Bus signal
2239
client.Rejected("Approval timed out")
2240
return
2241
else:
2242
break
2243
else:
2244
delay -= time2 - time
2245
2246
try:
2247
session.send(client.secret)
2248
except gnutls.Error as error:
2249
logger.warning("gnutls send failed",
2250
exc_info = error)
2251
return
2252
2253
logger.info("Sending secret to %s", client.name)
2254
# bump the timeout using extended_timeout
2255
client.bump_timeout(client.extended_timeout)
2256
if self.server.use_dbus:
2257
# Emit D-Bus signal
2258
client.GotSecret()
2259
1060
else:
1061
ipc.write(u"NOTFOUND %s %s\n"
1062
% (fpr, unicode(self.client_address)))
1063
return
1064
1065
class ClientProxy(object):
1066
"""Client proxy object. Not for calling methods."""
1067
def __init__(self, client):
1068
self.client = client
1069
def __getattr__(self, name):
1070
if name.startswith("ipc_"):
1071
def tempfunc():
1072
ipc.write("%s %s\n" % (name[4:].upper(),
1073
self.client.name))
1074
return tempfunc
1075
if not hasattr(self.client, name):
1076
raise AttributeError
1077
ipc.write(u"GETATTR %s %s\n"
1078
% (name, self.client.fingerprint))
1079
return pickle.load(ipc_return)
1080
clientproxy = ClientProxy(client)
1081
# Have to check if client.enabled, since it is
1082
# possible that the client was disabled since the
1083
# GnuTLS session was established.
1084
if not clientproxy.enabled:
1085
clientproxy.ipc_disabled()
1086
return
1087
1088
clientproxy.ipc_sending()
1089
sent_size = 0
1090
while sent_size < len(client.secret):
1091
sent = session.send(client.secret[sent_size:])
1092
logger.debug(u"Sent: %d, remaining: %d",
1093
sent, len(client.secret)
1094
- (sent_size + sent))
1095
sent_size += sent
2260
1096
finally:
2261
if approval_required:
2262
client.approvals_pending -= 1
2263
try:
2264
session.bye()
2265
except gnutls.Error as error:
2266
logger.warning("GnuTLS bye failed",
2267
exc_info=error)
1097
session.bye()
2268
1098
2269
1099
@staticmethod
2270
1100
def peer_certificate(session):
2271
1101
"Return the peer's OpenPGP certificate as a bytestring"
2272
1102
# If not an OpenPGP certificate...
2273
if (gnutls.certificate_type_get(session._c_object)
2274
!= gnutls.CRT_OPENPGP):
2275
# ...return invalid data
2276
return b""
1103
if (gnutls.library.functions
1104
.gnutls_certificate_type_get(session._c_object)
1105
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1106
# ...do the normal thing
1107
return session.peer_certificate
2277
1108
list_size = ctypes.c_uint(1)
2278
cert_list = (gnutls.certificate_get_peers
1109
cert_list = (gnutls.library.functions
1110
.gnutls_certificate_get_peers
2279
1111
(session._c_object, ctypes.byref(list_size)))
2280
1112
if not bool(cert_list) and list_size.value != 0:
2281
raise gnutls.Error("error getting peer certificate")
1113
raise gnutls.errors.GNUTLSError(u"error getting peer"
1114
u" certificate")
2282
1115
if list_size.value == 0:
2283
1116
return None
2284
1117
cert = cert_list[0]
2288
1121
def fingerprint(openpgp):
2289
1122
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2290
1123
# New GnuTLS "datum" with the OpenPGP public key
2291
datum = gnutls.datum_t(
2292
ctypes.cast(ctypes.c_char_p(openpgp),
2293
ctypes.POINTER(ctypes.c_ubyte)),
2294
ctypes.c_uint(len(openpgp)))
1124
datum = (gnutls.library.types
1125
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1126
ctypes.POINTER
1127
(ctypes.c_ubyte)),
1128
ctypes.c_uint(len(openpgp))))
2295
1129
# New empty GnuTLS certificate
2296
crt = gnutls.openpgp_crt_t()
2297
gnutls.openpgp_crt_init(ctypes.byref(crt))
1130
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1131
(gnutls.library.functions
1132
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2298
1133
# Import the OpenPGP public key into the certificate
2299
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2300
gnutls.OPENPGP_FMT_RAW)
1134
(gnutls.library.functions
1135
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1136
gnutls.library.constants
1137
.GNUTLS_OPENPGP_FMT_RAW))
2301
1138
# Verify the self signature in the key
2302
1139
crtverify = ctypes.c_uint()
2303
gnutls.openpgp_crt_verify_self(crt, 0,
2304
ctypes.byref(crtverify))
1140
(gnutls.library.functions
1141
.gnutls_openpgp_crt_verify_self(crt, 0,
1142
ctypes.byref(crtverify)))
2305
1143
if crtverify.value != 0:
2306
gnutls.openpgp_crt_deinit(crt)
2307
raise gnutls.CertificateSecurityError("Verify failed")
1144
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1145
raise (gnutls.errors.CertificateSecurityError
1146
(u"Verify failed"))
2308
1147
# New buffer for the fingerprint
2309
1148
buf = ctypes.create_string_buffer(20)
2310
1149
buf_len = ctypes.c_size_t()
2311
1150
# Get the fingerprint from the certificate into the buffer
2312
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2313
ctypes.byref(buf_len))
1151
(gnutls.library.functions
1152
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1153
ctypes.byref(buf_len)))
2314
1154
# Deinit the certificate
2315
gnutls.openpgp_crt_deinit(crt)
1155
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2316
1156
# Convert the buffer to a Python bytestring
2317
1157
fpr = ctypes.string_at(buf, buf_len.value)
2318
1158
# Convert the bytestring to hexadecimal notation
2319
hex_fpr = binascii.hexlify(fpr).upper()
1159
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
2320
1160
return hex_fpr
2321
1161
2322
1162
2323
class MultiprocessingMixIn(object):
2324
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2325
2326
def sub_process_main(self, request, address):
2327
try:
2328
self.finish_request(request, address)
2329
except Exception:
2330
self.handle_error(request, address)
2331
self.close_request(request)
2332
2333
def process_request(self, request, address):
2334
"""Start a new process to process the request."""
2335
proc = multiprocessing.Process(target = self.sub_process_main,
2336
args = (request, address))
2337
proc.start()
2338
return proc
2339
2340
2341
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2342
""" adds a pipe to the MixIn """
2343
1163
class ForkingMixInWithPipes(socketserver.ForkingMixIn, object):
1164
"""Like socketserver.ForkingMixIn, but also pass a pipe pair."""
2344
1165
def process_request(self, request, client_address):
2345
1166
"""Overrides and wraps the original process_request().
2346
1167
2347
1168
This function creates a new pipe in self.pipe
2348
1169
"""
2349
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2350
2351
proc = MultiprocessingMixIn.process_request(self, request,
2352
client_address)
2353
self.child_pipe.close()
2354
self.add_pipe(parent_pipe, proc)
2355
2356
def add_pipe(self, parent_pipe, proc):
1170
# Child writes to child_pipe
1171
self.child_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))
1172
# Parent writes to parent_pipe
1173
self.parent_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))
1174
super(ForkingMixInWithPipes,
1175
self).process_request(request, client_address)
1176
# Close unused ends for parent
1177
self.parent_pipe[0].close() # close read end
1178
self.child_pipe[1].close() # close write end
1179
self.add_pipe_fds(self.child_pipe[0], self.parent_pipe[1])
1180
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
2357
1181
"""Dummy function; override as necessary"""
2358
raise NotImplementedError()
2359
2360
2361
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1182
child_pipe_fd.close()
1183
parent_pipe_fd.close()
1184
1185
1186
class IPv6_TCPServer(ForkingMixInWithPipes,
2362
1187
socketserver.TCPServer, object):
2363
1188
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2364
1189
2367
1192
interface: None or a network interface name (string)
2368
1193
use_ipv6: Boolean; to use IPv6 or not
2369
1194
"""
2370
2371
1195
def __init__(self, server_address, RequestHandlerClass,
2372
interface=None,
2373
use_ipv6=True,
2374
socketfd=None):
2375
"""If socketfd is set, use that file descriptor instead of
2376
creating a new one with socket.socket().
2377
"""
1196
interface=None, use_ipv6=True):
2378
1197
self.interface = interface
2379
1198
if use_ipv6:
2380
1199
self.address_family = socket.AF_INET6
2381
if socketfd is not None:
2382
# Save the file descriptor
2383
self.socketfd = socketfd
2384
# Save the original socket.socket() function
2385
self.socket_socket = socket.socket
2386
# To implement --socket, we monkey patch socket.socket.
2387
#
2388
# (When socketserver.TCPServer is a new-style class, we
2389
# could make self.socket into a property instead of monkey
2390
# patching socket.socket.)
2391
#
2392
# Create a one-time-only replacement for socket.socket()
2393
@functools.wraps(socket.socket)
2394
def socket_wrapper(*args, **kwargs):
2395
# Restore original function so subsequent calls are
2396
# not affected.
2397
socket.socket = self.socket_socket
2398
del self.socket_socket
2399
# This time only, return a new socket object from the
2400
# saved file descriptor.
2401
return socket.fromfd(self.socketfd, *args, **kwargs)
2402
# Replace socket.socket() function with wrapper
2403
socket.socket = socket_wrapper
2404
# The socketserver.TCPServer.__init__ will call
2405
# socket.socket(), which might be our replacement,
2406
# socket_wrapper(), if socketfd was set.
2407
1200
socketserver.TCPServer.__init__(self, server_address,
2408
1201
RequestHandlerClass)
2409
2410
1202
def server_bind(self):
2411
1203
"""This overrides the normal server_bind() function
2412
1204
to bind to an interface if one was specified, and also NOT to
2413
1205
bind to an address or port if they were not specified."""
2414
1206
if self.interface is not None:
2415
1207
if SO_BINDTODEVICE is None:
2416
logger.error("SO_BINDTODEVICE does not exist;"
2417
" cannot bind to interface %s",
1208
logger.error(u"SO_BINDTODEVICE does not exist;"
1209
u" cannot bind to interface %s",
2418
1210
self.interface)
2419
1211
else:
2420
1212
try:
2421
self.socket.setsockopt(
2422
socket.SOL_SOCKET, SO_BINDTODEVICE,
2423
(self.interface + "\0").encode("utf-8"))
2424
except socket.error as error:
2425
if error.errno == errno.EPERM:
2426
logger.error("No permission to bind to"
2427
" interface %s", self.interface)
2428
elif error.errno == errno.ENOPROTOOPT:
2429
logger.error("SO_BINDTODEVICE not available;"
2430
" cannot bind to interface %s",
2431
self.interface)
2432
elif error.errno == errno.ENODEV:
2433
logger.error("Interface %s does not exist,"
2434
" cannot bind", self.interface)
1213
self.socket.setsockopt(socket.SOL_SOCKET,
1214
SO_BINDTODEVICE,
1215
str(self.interface
1216
+ u'\0'))
1217
except socket.error, error:
1218
if error[0] == errno.EPERM:
1219
logger.error(u"No permission to"
1220
u" bind to interface %s",
1221
self.interface)
1222
elif error[0] == errno.ENOPROTOOPT:
1223
logger.error(u"SO_BINDTODEVICE not available;"
1224
u" cannot bind to interface %s",
1225
self.interface)
2435
1226
else:
2436
1227
raise
2437
1228
# Only bind(2) the socket if we really need to.
2438
1229
if self.server_address[0] or self.server_address[1]:
2439
1230
if not self.server_address[0]:
2440
1231
if self.address_family == socket.AF_INET6:
2441
any_address = "::" # in6addr_any
1232
any_address = u"::" # in6addr_any
2442
1233
else:
2443
any_address = "0.0.0.0" # INADDR_ANY
1234
any_address = socket.INADDR_ANY
2444
1235
self.server_address = (any_address,
2445
1236
self.server_address[1])
2446
1237
elif not self.server_address[1]:
2447
self.server_address = (self.server_address[0], 0)
1238
self.server_address = (self.server_address[0],
1239
0)
2448
1240
# if self.interface:
2449
1241
# self.server_address = (self.server_address[0],
2450
1242
# 0, # port
2464
1256
2465
1257
Assumes a gobject.MainLoop event loop.
2466
1258
"""
2467
2468
1259
def __init__(self, server_address, RequestHandlerClass,
2469
interface=None,
2470
use_ipv6=True,
2471
clients=None,
2472
gnutls_priority=None,
2473
use_dbus=True,
2474
socketfd=None):
1260
interface=None, use_ipv6=True, clients=None,
1261
gnutls_priority=None, use_dbus=True):
2475
1262
self.enabled = False
2476
1263
self.clients = clients
2477
1264
if self.clients is None:
2478
self.clients = {}
1265
self.clients = set()
2479
1266
self.use_dbus = use_dbus
2480
1267
self.gnutls_priority = gnutls_priority
2481
1268
IPv6_TCPServer.__init__(self, server_address,
2482
1269
RequestHandlerClass,
2483
1270
interface = interface,
2484
use_ipv6 = use_ipv6,
2485
socketfd = socketfd)
2486
1271
use_ipv6 = use_ipv6)
2487
1272
def server_activate(self):
2488
1273
if self.enabled:
2489
1274
return socketserver.TCPServer.server_activate(self)
2490
2491
1275
def enable(self):
2492
1276
self.enabled = True
2493
2494
def add_pipe(self, parent_pipe, proc):
1277
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
2495
1278
# Call "handle_ipc" for both data and EOF events
2496
gobject.io_add_watch(
2497
parent_pipe.fileno(),
2498
gobject.IO_IN | gobject.IO_HUP,
2499
functools.partial(self.handle_ipc,
2500
parent_pipe = parent_pipe,
2501
proc = proc))
2502
2503
def handle_ipc(self, source, condition,
2504
parent_pipe=None,
2505
proc = None,
2506
client_object=None):
2507
# error, or the other end of multiprocessing.Pipe has closed
2508
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2509
# Wait for other process to exit
2510
proc.join()
2511
return False
2512
2513
# Read a request from the child
2514
request = parent_pipe.recv()
2515
command = request[0]
2516
2517
if command == 'init':
2518
fpr = request[1]
2519
address = request[2]
2520
2521
for c in self.clients.itervalues():
2522
if c.fingerprint == fpr:
2523
client = c
2524
break
2525
else:
2526
logger.info("Client not found for fingerprint: %s, ad"
2527
"dress: %s", fpr, address)
2528
if self.use_dbus:
2529
# Emit D-Bus signal
2530
mandos_dbus_service.ClientNotFound(fpr,
2531
address[0])
2532
parent_pipe.send(False)
2533
return False
2534
2535
gobject.io_add_watch(
2536
parent_pipe.fileno(),
2537
gobject.IO_IN | gobject.IO_HUP,
2538
functools.partial(self.handle_ipc,
2539
parent_pipe = parent_pipe,
2540
proc = proc,
2541
client_object = client))
2542
parent_pipe.send(True)
2543
# remove the old hook in favor of the new above hook on
2544
# same fileno
2545
return False
2546
if command == 'funcall':
2547
funcname = request[1]
2548
args = request[2]
2549
kwargs = request[3]
2550
2551
parent_pipe.send(('data', getattr(client_object,
2552
funcname)(*args,
2553
**kwargs)))
2554
2555
if command == 'getattr':
2556
attrname = request[1]
2557
if isinstance(client_object.__getattribute__(attrname),
2558
collections.Callable):
2559
parent_pipe.send(('function', ))
2560
else:
2561
parent_pipe.send((
2562
'data', client_object.__getattribute__(attrname)))
2563
2564
if command == 'setattr':
2565
attrname = request[1]
2566
value = request[2]
2567
setattr(client_object, attrname, value)
2568
1279
gobject.io_add_watch(child_pipe_fd.fileno(),
1280
gobject.IO_IN | gobject.IO_HUP,
1281
functools.partial(self.handle_ipc,
1282
reply = parent_pipe_fd,
1283
sender= child_pipe_fd))
1284
def handle_ipc(self, source, condition, reply=None, sender=None):
1285
condition_names = {
1286
gobject.IO_IN: u"IN", # There is data to read.
1287
gobject.IO_OUT: u"OUT", # Data can be written (without
1288
# blocking).
1289
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1290
gobject.IO_ERR: u"ERR", # Error condition.
1291
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1292
# broken, usually for pipes and
1293
# sockets).
1294
}
1295
conditions_string = ' | '.join(name
1296
for cond, name in
1297
condition_names.iteritems()
1298
if cond & condition)
1299
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1300
conditions_string)
1301
1302
# Read a line from the file object
1303
cmdline = sender.readline()
1304
if not cmdline: # Empty line means end of file
1305
# close the IPC pipes
1306
sender.close()
1307
reply.close()
1308
1309
# Stop calling this function
1310
return False
1311
1312
logger.debug(u"IPC command: %r", cmdline)
1313
1314
# Parse and act on command
1315
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1316
1317
if cmd == u"NOTFOUND":
1318
fpr, address = args.split(None, 1)
1319
logger.warning(u"Client not found for fingerprint: %s, ad"
1320
u"dress: %s", fpr, address)
1321
if self.use_dbus:
1322
# Emit D-Bus signal
1323
mandos_dbus_service.ClientNotFound(fpr, address)
1324
elif cmd == u"DISABLED":
1325
for client in self.clients:
1326
if client.name == args:
1327
logger.warning(u"Client %s is disabled", args)
1328
if self.use_dbus:
1329
# Emit D-Bus signal
1330
client.Rejected()
1331
break
1332
else:
1333
logger.error(u"Unknown client %s is disabled", args)
1334
elif cmd == u"SENDING":
1335
for client in self.clients:
1336
if client.name == args:
1337
logger.info(u"Sending secret to %s", client.name)
1338
client.checked_ok()
1339
if self.use_dbus:
1340
# Emit D-Bus signal
1341
client.GotSecret()
1342
break
1343
else:
1344
logger.error(u"Sending secret to unknown client %s",
1345
args)
1346
elif cmd == u"GETATTR":
1347
attr_name, fpr = args.split(None, 1)
1348
for client in self.clients:
1349
if client.fingerprint == fpr:
1350
attr_value = getattr(client, attr_name, None)
1351
logger.debug("IPC reply: %r", attr_value)
1352
pickle.dump(attr_value, reply)
1353
break
1354
else:
1355
logger.error(u"Client %s on address %s requesting "
1356
u"attribute %s not found", fpr, address,
1357
attr_name)
1358
pickle.dump(None, reply)
1359
else:
1360
logger.error(u"Unknown IPC command: %r", cmdline)
1361
1362
# Keep calling this function
2569
1363
return True
2570
1364
2571
1365
2572
def rfc3339_duration_to_delta(duration):
2573
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2574
2575
>>> rfc3339_duration_to_delta("P7D")
2576
datetime.timedelta(7)
2577
>>> rfc3339_duration_to_delta("PT60S")
2578
datetime.timedelta(0, 60)
2579
>>> rfc3339_duration_to_delta("PT60M")
2580
datetime.timedelta(0, 3600)
2581
>>> rfc3339_duration_to_delta("PT24H")
2582
datetime.timedelta(1)
2583
>>> rfc3339_duration_to_delta("P1W")
2584
datetime.timedelta(7)
2585
>>> rfc3339_duration_to_delta("PT5M30S")
2586
datetime.timedelta(0, 330)
2587
>>> rfc3339_duration_to_delta("P1DT3M20S")
2588
datetime.timedelta(1, 200)
2589
"""
2590
2591
# Parsing an RFC 3339 duration with regular expressions is not
2592
# possible - there would have to be multiple places for the same
2593
# values, like seconds. The current code, while more esoteric, is
2594
# cleaner without depending on a parsing library. If Python had a
2595
# built-in library for parsing we would use it, but we'd like to
2596
# avoid excessive use of external libraries.
2597
2598
# New type for defining tokens, syntax, and semantics all-in-one
2599
Token = collections.namedtuple("Token", (
2600
"regexp", # To match token; if "value" is not None, must have
2601
# a "group" containing digits
2602
"value", # datetime.timedelta or None
2603
"followers")) # Tokens valid after this token
2604
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2605
# the "duration" ABNF definition in RFC 3339, Appendix A.
2606
token_end = Token(re.compile(r"$"), None, frozenset())
2607
token_second = Token(re.compile(r"(\d+)S"),
2608
datetime.timedelta(seconds=1),
2609
frozenset((token_end, )))
2610
token_minute = Token(re.compile(r"(\d+)M"),
2611
datetime.timedelta(minutes=1),
2612
frozenset((token_second, token_end)))
2613
token_hour = Token(re.compile(r"(\d+)H"),
2614
datetime.timedelta(hours=1),
2615
frozenset((token_minute, token_end)))
2616
token_time = Token(re.compile(r"T"),
2617
None,
2618
frozenset((token_hour, token_minute,
2619
token_second)))
2620
token_day = Token(re.compile(r"(\d+)D"),
2621
datetime.timedelta(days=1),
2622
frozenset((token_time, token_end)))
2623
token_month = Token(re.compile(r"(\d+)M"),
2624
datetime.timedelta(weeks=4),
2625
frozenset((token_day, token_end)))
2626
token_year = Token(re.compile(r"(\d+)Y"),
2627
datetime.timedelta(weeks=52),
2628
frozenset((token_month, token_end)))
2629
token_week = Token(re.compile(r"(\d+)W"),
2630
datetime.timedelta(weeks=1),
2631
frozenset((token_end, )))
2632
token_duration = Token(re.compile(r"P"), None,
2633
frozenset((token_year, token_month,
2634
token_day, token_time,
2635
token_week)))
2636
# Define starting values
2637
value = datetime.timedelta() # Value so far
2638
found_token = None
2639
followers = frozenset((token_duration, )) # Following valid tokens
2640
s = duration # String left to parse
2641
# Loop until end token is found
2642
while found_token is not token_end:
2643
# Search for any currently valid tokens
2644
for token in followers:
2645
match = token.regexp.match(s)
2646
if match is not None:
2647
# Token found
2648
if token.value is not None:
2649
# Value found, parse digits
2650
factor = int(match.group(1), 10)
2651
# Add to value so far
2652
value += factor * token.value
2653
# Strip token from string
2654
s = token.regexp.sub("", s, 1)
2655
# Go to found token
2656
found_token = token
2657
# Set valid next tokens
2658
followers = found_token.followers
2659
break
2660
else:
2661
# No currently valid tokens were found
2662
raise ValueError("Invalid RFC 3339 duration: {!r}"
2663
.format(duration))
2664
# End token found
2665
return value
2666
2667
2668
1366
def string_to_delta(interval):
2669
1367
"""Parse a string and return a datetime.timedelta
2670
1368
2671
>>> string_to_delta('7d')
1369
>>> string_to_delta(u'7d')
2672
1370
datetime.timedelta(7)
2673
>>> string_to_delta('60s')
1371
>>> string_to_delta(u'60s')
2674
1372
datetime.timedelta(0, 60)
2675
>>> string_to_delta('60m')
1373
>>> string_to_delta(u'60m')
2676
1374
datetime.timedelta(0, 3600)
2677
>>> string_to_delta('24h')
1375
>>> string_to_delta(u'24h')
2678
1376
datetime.timedelta(1)
2679
>>> string_to_delta('1w')
1377
>>> string_to_delta(u'1w')
2680
1378
datetime.timedelta(7)
2681
>>> string_to_delta('5m 30s')
1379
>>> string_to_delta(u'5m 30s')
2682
1380
datetime.timedelta(0, 330)
2683
1381
"""
2684
2685
try:
2686
return rfc3339_duration_to_delta(interval)
2687
except ValueError:
2688
pass
2689
2690
1382
timevalue = datetime.timedelta(0)
2691
1383
for s in interval.split():
2692
1384
try:
2693
suffix = s[-1]
1385
suffix = unicode(s[-1])
2694
1386
value = int(s[:-1])
2695
if suffix == "d":
1387
if suffix == u"d":
2696
1388
delta = datetime.timedelta(value)
2697
elif suffix == "s":
1389
elif suffix == u"s":
2698
1390
delta = datetime.timedelta(0, value)
2699
elif suffix == "m":
1391
elif suffix == u"m":
2700
1392
delta = datetime.timedelta(0, 0, 0, 0, value)
2701
elif suffix == "h":
1393
elif suffix == u"h":
2702
1394
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2703
elif suffix == "w":
1395
elif suffix == u"w":
2704
1396
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2705
1397
else:
2706
raise ValueError("Unknown suffix {!r}".format(suffix))
2707
except IndexError as e:
2708
raise ValueError(*(e.args))
1398
raise ValueError(u"Unknown suffix %r" % suffix)
1399
except (ValueError, IndexError), e:
1400
raise ValueError(e.message)
2709
1401
timevalue += delta
2710
1402
return timevalue
2711
1403
2712
1404
1405
def if_nametoindex(interface):
1406
"""Call the C function if_nametoindex(), or equivalent
1407
1408
Note: This function cannot accept a unicode string."""
1409
global if_nametoindex
1410
try:
1411
if_nametoindex = (ctypes.cdll.LoadLibrary
1412
(ctypes.util.find_library(u"c"))
1413
.if_nametoindex)
1414
except (OSError, AttributeError):
1415
logger.warning(u"Doing if_nametoindex the hard way")
1416
def if_nametoindex(interface):
1417
"Get an interface index the hard way, i.e. using fcntl()"
1418
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1419
with contextlib.closing(socket.socket()) as s:
1420
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1421
struct.pack(str(u"16s16x"),
1422
interface))
1423
interface_index = struct.unpack(str(u"I"),
1424
ifreq[16:20])[0]
1425
return interface_index
1426
return if_nametoindex(interface)
1427
1428
2713
1429
def daemon(nochdir = False, noclose = False):
2714
1430
"""See daemon(3). Standard BSD Unix function.
2715
1431
2718
1434
sys.exit()
2719
1435
os.setsid()
2720
1436
if not nochdir:
2721
os.chdir("/")
1437
os.chdir(u"/")
2722
1438
if os.fork():
2723
1439
sys.exit()
2724
1440
if not noclose:
2725
1441
# Close all standard open file descriptors
2726
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1442
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2727
1443
if not stat.S_ISCHR(os.fstat(null).st_mode):
2728
1444
raise OSError(errno.ENODEV,
2729
"{} not a character device"
2730
.format(os.devnull))
1445
u"%s not a character device"
1446
% os.path.devnull)
2731
1447
os.dup2(null, sys.stdin.fileno())
2732
1448
os.dup2(null, sys.stdout.fileno())
2733
1449
os.dup2(null, sys.stderr.fileno())
2740
1456
##################################################################
2741
1457
# Parsing of options, both command line and config file
2742
1458
2743
parser = argparse.ArgumentParser()
2744
parser.add_argument("-v", "--version", action="version",
2745
version = "%(prog)s {}".format(version),
2746
help="show version number and exit")
2747
parser.add_argument("-i", "--interface", metavar="IF",
2748
help="Bind to interface IF")
2749
parser.add_argument("-a", "--address",
2750
help="Address to listen for requests on")
2751
parser.add_argument("-p", "--port", type=int,
2752
help="Port number to receive requests on")
2753
parser.add_argument("--check", action="store_true",
2754
help="Run self-test")
2755
parser.add_argument("--debug", action="store_true",
2756
help="Debug mode; run in foreground and log"
2757
" to terminal", default=None)
2758
parser.add_argument("--debuglevel", metavar="LEVEL",
2759
help="Debug level for stdout output")
2760
parser.add_argument("--priority", help="GnuTLS"
2761
" priority string (see GnuTLS documentation)")
2762
parser.add_argument("--servicename",
2763
metavar="NAME", help="Zeroconf service name")
2764
parser.add_argument("--configdir",
2765
default="/etc/mandos", metavar="DIR",
2766
help="Directory to search for configuration"
2767
" files")
2768
parser.add_argument("--no-dbus", action="store_false",
2769
dest="use_dbus", help="Do not provide D-Bus"
2770
" system bus interface", default=None)
2771
parser.add_argument("--no-ipv6", action="store_false",
2772
dest="use_ipv6", help="Do not use IPv6",
2773
default=None)
2774
parser.add_argument("--no-restore", action="store_false",
2775
dest="restore", help="Do not restore stored"
2776
" state", default=None)
2777
parser.add_argument("--socket", type=int,
2778
help="Specify a file descriptor to a network"
2779
" socket to use instead of creating one")
2780
parser.add_argument("--statedir", metavar="DIR",
2781
help="Directory to save/restore state in")
2782
parser.add_argument("--foreground", action="store_true",
2783
help="Run in foreground", default=None)
2784
parser.add_argument("--no-zeroconf", action="store_false",
2785
dest="zeroconf", help="Do not use Zeroconf",
2786
default=None)
2787
2788
options = parser.parse_args()
1459
parser = optparse.OptionParser(version = "%%prog %s" % version)
1460
parser.add_option("-i", u"--interface", type=u"string",
1461
metavar="IF", help=u"Bind to interface IF")
1462
parser.add_option("-a", u"--address", type=u"string",
1463
help=u"Address to listen for requests on")
1464
parser.add_option("-p", u"--port", type=u"int",
1465
help=u"Port number to receive requests on")
1466
parser.add_option("--check", action=u"store_true",
1467
help=u"Run self-test")
1468
parser.add_option("--debug", action=u"store_true",
1469
help=u"Debug mode; run in foreground and log to"
1470
u" terminal")
1471
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1472
u" priority string (see GnuTLS documentation)")
1473
parser.add_option("--servicename", type=u"string",
1474
metavar=u"NAME", help=u"Zeroconf service name")
1475
parser.add_option("--configdir", type=u"string",
1476
default=u"/etc/mandos", metavar=u"DIR",
1477
help=u"Directory to search for configuration"
1478
u" files")
1479
parser.add_option("--no-dbus", action=u"store_false",
1480
dest=u"use_dbus", help=u"Do not provide D-Bus"
1481
u" system bus interface")
1482
parser.add_option("--no-ipv6", action=u"store_false",
1483
dest=u"use_ipv6", help=u"Do not use IPv6")
1484
options = parser.parse_args()[0]
2789
1485
2790
1486
if options.check:
2791
1487
import doctest
2792
fail_count, test_count = doctest.testmod()
2793
sys.exit(os.EX_OK if fail_count == 0 else 1)
1488
doctest.testmod()
1489
sys.exit()
2794
1490
2795
1491
# Default values for config file for server-global settings
2796
server_defaults = { "interface": "",
2797
"address": "",
2798
"port": "",
2799
"debug": "False",
2800
"priority":
2801
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2802
":+SIGN-DSA-SHA256",
2803
"servicename": "Mandos",
2804
"use_dbus": "True",
2805
"use_ipv6": "True",
2806
"debuglevel": "",
2807
"restore": "True",
2808
"socket": "",
2809
"statedir": "/var/lib/mandos",
2810
"foreground": "False",
2811
"zeroconf": "True",
2812
}
1492
server_defaults = { u"interface": u"",
1493
u"address": u"",
1494
u"port": u"",
1495
u"debug": u"False",
1496
u"priority":
1497
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1498
u"servicename": u"Mandos",
1499
u"use_dbus": u"True",
1500
u"use_ipv6": u"True",
1501
}
2813
1502
2814
1503
# Parse config file for server-global settings
2815
1504
server_config = configparser.SafeConfigParser(server_defaults)
2816
1505
del server_defaults
2817
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1506
server_config.read(os.path.join(options.configdir,
1507
u"mandos.conf"))
2818
1508
# Convert the SafeConfigParser object to a dict
2819
1509
server_settings = server_config.defaults()
2820
1510
# Use the appropriate methods on the non-string config options
2821
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2822
server_settings[option] = server_config.getboolean("DEFAULT",
1511
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1512
server_settings[option] = server_config.getboolean(u"DEFAULT",
2823
1513
option)
2824
1514
if server_settings["port"]:
2825
server_settings["port"] = server_config.getint("DEFAULT",
2826
"port")
2827
if server_settings["socket"]:
2828
server_settings["socket"] = server_config.getint("DEFAULT",
2829
"socket")
2830
# Later, stdin will, and stdout and stderr might, be dup'ed
2831
# over with an opened os.devnull. But we don't want this to
2832
# happen with a supplied network socket.
2833
if 0 <= server_settings["socket"] <= 2:
2834
server_settings["socket"] = os.dup(server_settings
2835
["socket"])
1515
server_settings["port"] = server_config.getint(u"DEFAULT",
1516
u"port")
2836
1517
del server_config
2837
1518
2838
1519
# Override the settings from the config file with command line
2839
1520
# options, if set.
2840
for option in ("interface", "address", "port", "debug",
2841
"priority", "servicename", "configdir", "use_dbus",
2842
"use_ipv6", "debuglevel", "restore", "statedir",
2843
"socket", "foreground", "zeroconf"):
1521
for option in (u"interface", u"address", u"port", u"debug",
1522
u"priority", u"servicename", u"configdir",
1523
u"use_dbus", u"use_ipv6"):
2844
1524
value = getattr(options, option)
2845
1525
if value is not None:
2846
1526
server_settings[option] = value
2847
1527
del options
2848
1528
# Force all strings to be unicode
2849
1529
for option in server_settings.keys():
2850
if isinstance(server_settings[option], bytes):
2851
server_settings[option] = (server_settings[option]
2852
.decode("utf-8"))
2853
# Force all boolean options to be boolean
2854
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2855
"foreground", "zeroconf"):
2856
server_settings[option] = bool(server_settings[option])
2857
# Debug implies foreground
2858
if server_settings["debug"]:
2859
server_settings["foreground"] = True
1530
if type(server_settings[option]) is str:
1531
server_settings[option] = unicode(server_settings[option])
2860
1532
# Now we have our good server settings in "server_settings"
2861
1533
2862
1534
##################################################################
2863
1535
2864
if (not server_settings["zeroconf"]
2865
and not (server_settings["port"]
2866
or server_settings["socket"] != "")):
2867
parser.error("Needs port or socket to work without Zeroconf")
2868
2869
1536
# For convenience
2870
debug = server_settings["debug"]
2871
debuglevel = server_settings["debuglevel"]
2872
use_dbus = server_settings["use_dbus"]
2873
use_ipv6 = server_settings["use_ipv6"]
2874
stored_state_path = os.path.join(server_settings["statedir"],
2875
stored_state_file)
2876
foreground = server_settings["foreground"]
2877
zeroconf = server_settings["zeroconf"]
2878
2879
if debug:
2880
initlogger(debug, logging.DEBUG)
2881
else:
2882
if not debuglevel:
2883
initlogger(debug)
2884
else:
2885
level = getattr(logging, debuglevel.upper())
2886
initlogger(debug, level)
2887
2888
if server_settings["servicename"] != "Mandos":
2889
syslogger.setFormatter(
2890
logging.Formatter('Mandos ({}) [%(process)d]:'
2891
' %(levelname)s: %(message)s'.format(
2892
server_settings["servicename"])))
1537
debug = server_settings[u"debug"]
1538
use_dbus = server_settings[u"use_dbus"]
1539
use_ipv6 = server_settings[u"use_ipv6"]
1540
1541
if not debug:
1542
syslogger.setLevel(logging.WARNING)
1543
console.setLevel(logging.WARNING)
1544
1545
if server_settings[u"servicename"] != u"Mandos":
1546
syslogger.setFormatter(logging.Formatter
1547
(u'Mandos (%s) [%%(process)d]:'
1548
u' %%(levelname)s: %%(message)s'
1549
% server_settings[u"servicename"]))
2893
1550
2894
1551
# Parse config file with clients
2895
client_config = configparser.SafeConfigParser(Client
2896
.client_defaults)
2897
client_config.read(os.path.join(server_settings["configdir"],
2898
"clients.conf"))
1552
client_defaults = { u"timeout": u"1h",
1553
u"interval": u"5m",
1554
u"checker": u"fping -q -- %%(host)s",
1555
u"host": u"",
1556
}
1557
client_config = configparser.SafeConfigParser(client_defaults)
1558
client_config.read(os.path.join(server_settings[u"configdir"],
1559
u"clients.conf"))
2899
1560
2900
1561
global mandos_dbus_service
2901
1562
mandos_dbus_service = None
2902
1563
2903
socketfd = None
2904
if server_settings["socket"] != "":
2905
socketfd = server_settings["socket"]
2906
tcp_server = MandosServer(
2907
(server_settings["address"], server_settings["port"]),
2908
ClientHandler,
2909
interface=(server_settings["interface"] or None),
2910
use_ipv6=use_ipv6,
2911
gnutls_priority=server_settings["priority"],
2912
use_dbus=use_dbus,
2913
socketfd=socketfd)
2914
if not foreground:
2915
pidfilename = "/run/mandos.pid"
2916
if not os.path.isdir("/run/."):
2917
pidfilename = "/var/run/mandos.pid"
2918
pidfile = None
2919
try:
2920
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2921
except IOError as e:
2922
logger.error("Could not open file %r", pidfilename,
2923
exc_info=e)
1564
tcp_server = MandosServer((server_settings[u"address"],
1565
server_settings[u"port"]),
1566
ClientHandler,
1567
interface=server_settings[u"interface"],
1568
use_ipv6=use_ipv6,
1569
gnutls_priority=
1570
server_settings[u"priority"],
1571
use_dbus=use_dbus)
1572
pidfilename = u"/var/run/mandos.pid"
1573
try:
1574
pidfile = open(pidfilename, u"w")
1575
except IOError:
1576
logger.error(u"Could not open file %r", pidfilename)
2924
1577
2925
for name in ("_mandos", "mandos", "nobody"):
1578
try:
1579
uid = pwd.getpwnam(u"_mandos").pw_uid
1580
gid = pwd.getpwnam(u"_mandos").pw_gid
1581
except KeyError:
2926
1582
try:
2927
uid = pwd.getpwnam(name).pw_uid
2928
gid = pwd.getpwnam(name).pw_gid
2929
break
1583
uid = pwd.getpwnam(u"mandos").pw_uid
1584
gid = pwd.getpwnam(u"mandos").pw_gid
2930
1585
except KeyError:
2931
continue
2932
else:
2933
uid = 65534
2934
gid = 65534
1586
try:
1587
uid = pwd.getpwnam(u"nobody").pw_uid
1588
gid = pwd.getpwnam(u"nobody").pw_gid
1589
except KeyError:
1590
uid = 65534
1591
gid = 65534
2935
1592
try:
2936
1593
os.setgid(gid)
2937
1594
os.setuid(uid)
2938
except OSError as error:
2939
if error.errno != errno.EPERM:
2940
raise
1595
except OSError, error:
1596
if error[0] != errno.EPERM:
1597
raise error
2941
1598
1599
# Enable all possible GnuTLS debugging
2942
1600
if debug:
2943
# Enable all possible GnuTLS debugging
2944
2945
1601
# "Use a log level over 10 to enable all debugging options."
2946
1602
# - GnuTLS manual
2947
gnutls.global_set_log_level(11)
1603
gnutls.library.functions.gnutls_global_set_log_level(11)
2948
1604
2949
@gnutls.log_func
1605
@gnutls.library.types.gnutls_log_func
2950
1606
def debug_gnutls(level, string):
2951
logger.debug("GnuTLS: %s", string[:-1])
2952
2953
gnutls.global_set_log_function(debug_gnutls)
2954
2955
# Redirect stdin so all checkers get /dev/null
2956
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2957
os.dup2(null, sys.stdin.fileno())
2958
if null > 2:
2959
os.close(null)
2960
2961
# Need to fork before connecting to D-Bus
2962
if not foreground:
2963
# Close all input and output, do double fork, etc.
2964
daemon()
2965
2966
# multiprocessing will use threads, so before we use gobject we
2967
# need to inform gobject that threads will be used.
2968
gobject.threads_init()
1607
logger.debug(u"GnuTLS: %s", string[:-1])
1608
1609
(gnutls.library.functions
1610
.gnutls_global_set_log_function(debug_gnutls))
2969
1611
2970
1612
global main_loop
2971
1613
# From the Avahi example code
2972
DBusGMainLoop(set_as_default=True)
1614
DBusGMainLoop(set_as_default=True )
2973
1615
main_loop = gobject.MainLoop()
2974
1616
bus = dbus.SystemBus()
2975
1617
# End of Avahi example code
2976
1618
if use_dbus:
2977
1619
try:
2978
bus_name = dbus.service.BusName("se.recompile.Mandos",
2979
bus,
2980
do_not_queue=True)
2981
old_bus_name = dbus.service.BusName(
2982
"se.bsnet.fukt.Mandos", bus,
2983
do_not_queue=True)
2984
except dbus.exceptions.DBusException as e:
2985
logger.error("Disabling D-Bus:", exc_info=e)
1620
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1621
bus, do_not_queue=True)
1622
except dbus.exceptions.NameExistsException, e:
1623
logger.error(unicode(e) + u", disabling D-Bus")
2986
1624
use_dbus = False
2987
server_settings["use_dbus"] = False
1625
server_settings[u"use_dbus"] = False
2988
1626
tcp_server.use_dbus = False
2989
if zeroconf:
2990
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2991
service = AvahiServiceToSyslog(
2992
name = server_settings["servicename"],
2993
servicetype = "_mandos._tcp",
2994
protocol = protocol,
2995
bus = bus)
2996
if server_settings["interface"]:
2997
service.interface = if_nametoindex(
2998
server_settings["interface"].encode("utf-8"))
2999
3000
global multiprocessing_manager
3001
multiprocessing_manager = multiprocessing.Manager()
1627
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1628
service = AvahiService(name = server_settings[u"servicename"],
1629
servicetype = u"_mandos._tcp",
1630
protocol = protocol, bus = bus)
1631
if server_settings["interface"]:
1632
service.interface = (if_nametoindex
1633
(str(server_settings[u"interface"])))
3002
1634
3003
1635
client_class = Client
3004
1636
if use_dbus:
3005
1637
client_class = functools.partial(ClientDBus, bus = bus)
3006
3007
client_settings = Client.config_parser(client_config)
3008
old_client_settings = {}
3009
clients_data = {}
3010
3011
# This is used to redirect stdout and stderr for checker processes
3012
global wnull
3013
wnull = open(os.devnull, "w") # A writable /dev/null
3014
# Only used if server is running in foreground but not in debug
3015
# mode
3016
if debug or not foreground:
3017
wnull.close()
3018
3019
# Get client data and settings from last running state.
3020
if server_settings["restore"]:
3021
try:
3022
with open(stored_state_path, "rb") as stored_state:
3023
clients_data, old_client_settings = pickle.load(
3024
stored_state)
3025
os.remove(stored_state_path)
3026
except IOError as e:
3027
if e.errno == errno.ENOENT:
3028
logger.warning("Could not load persistent state:"
3029
" {}".format(os.strerror(e.errno)))
3030
else:
3031
logger.critical("Could not load persistent state:",
3032
exc_info=e)
3033
raise
3034
except EOFError as e:
3035
logger.warning("Could not load persistent state: "
3036
"EOFError:",
3037
exc_info=e)
3038
3039
with PGPEngine() as pgp:
3040
for client_name, client in clients_data.items():
3041
# Skip removed clients
3042
if client_name not in client_settings:
3043
continue
3044
3045
# Decide which value to use after restoring saved state.
3046
# We have three different values: Old config file,
3047
# new config file, and saved state.
3048
# New config value takes precedence if it differs from old
3049
# config value, otherwise use saved state.
3050
for name, value in client_settings[client_name].items():
3051
try:
3052
# For each value in new config, check if it
3053
# differs from the old config value (Except for
3054
# the "secret" attribute)
3055
if (name != "secret"
3056
and (value !=
3057
old_client_settings[client_name][name])):
3058
client[name] = value
3059
except KeyError:
3060
pass
3061
3062
# Clients who has passed its expire date can still be
3063
# enabled if its last checker was successful. A Client
3064
# whose checker succeeded before we stored its state is
3065
# assumed to have successfully run all checkers during
3066
# downtime.
3067
if client["enabled"]:
3068
if datetime.datetime.utcnow() >= client["expires"]:
3069
if not client["last_checked_ok"]:
3070
logger.warning(
3071
"disabling client {} - Client never "
3072
"performed a successful checker".format(
3073
client_name))
3074
client["enabled"] = False
3075
elif client["last_checker_status"] != 0:
3076
logger.warning(
3077
"disabling client {} - Client last"
3078
" checker failed with error code"
3079
" {}".format(
3080
client_name,
3081
client["last_checker_status"]))
3082
client["enabled"] = False
3083
else:
3084
client["expires"] = (
3085
datetime.datetime.utcnow()
3086
+ client["timeout"])
3087
logger.debug("Last checker succeeded,"
3088
" keeping {} enabled".format(
3089
client_name))
3090
try:
3091
client["secret"] = pgp.decrypt(
3092
client["encrypted_secret"],
3093
client_settings[client_name]["secret"])
3094
except PGPError:
3095
# If decryption fails, we use secret from new settings
3096
logger.debug("Failed to decrypt {} old secret".format(
3097
client_name))
3098
client["secret"] = (client_settings[client_name]
3099
["secret"])
3100
3101
# Add/remove clients based on new changes made to config
3102
for client_name in (set(old_client_settings)
3103
- set(client_settings)):
3104
del clients_data[client_name]
3105
for client_name in (set(client_settings)
3106
- set(old_client_settings)):
3107
clients_data[client_name] = client_settings[client_name]
3108
3109
# Create all client objects
3110
for client_name, client in clients_data.items():
3111
tcp_server.clients[client_name] = client_class(
3112
name = client_name,
3113
settings = client,
3114
server_settings = server_settings)
3115
1638
tcp_server.clients.update(set(
1639
client_class(name = section,
1640
config= dict(client_config.items(section)))
1641
for section in client_config.sections()))
3116
1642
if not tcp_server.clients:
3117
logger.warning("No clients defined")
3118
3119
if not foreground:
3120
if pidfile is not None:
1643
logger.warning(u"No clients defined")
1644
1645
if debug:
1646
# Redirect stdin so all checkers get /dev/null
1647
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1648
os.dup2(null, sys.stdin.fileno())
1649
if null > 2:
1650
os.close(null)
1651
else:
1652
# No console logging
1653
logger.removeHandler(console)
1654
# Close all input and output, do double fork, etc.
1655
daemon()
1656
1657
try:
1658
with pidfile:
3121
1659
pid = os.getpid()
3122
try:
3123
with pidfile:
3124
print(pid, file=pidfile)
3125
except IOError:
3126
logger.error("Could not write to file %r with PID %d",
3127
pidfilename, pid)
1660
pidfile.write(str(pid) + "\n")
3128
1661
del pidfile
3129
del pidfilename
1662
except IOError:
1663
logger.error(u"Could not write to file %r with PID %d",
1664
pidfilename, pid)
1665
except NameError:
1666
# "pidfile" was never created
1667
pass
1668
del pidfilename
3130
1669
1670
if not debug:
1671
signal.signal(signal.SIGINT, signal.SIG_IGN)
3131
1672
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
3132
1673
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3133
1674
3134
1675
if use_dbus:
3135
3136
@alternate_dbus_interfaces(
3137
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3138
class MandosDBusService(DBusObjectWithObjectManager):
1676
class MandosDBusService(dbus.service.Object):
3139
1677
"""A D-Bus proxy object"""
3140
3141
1678
def __init__(self):
3142
dbus.service.Object.__init__(self, bus, "/")
3143
3144
_interface = "se.recompile.Mandos"
3145
3146
@dbus.service.signal(_interface, signature="o")
1679
dbus.service.Object.__init__(self, bus, u"/")
1680
_interface = u"se.bsnet.fukt.Mandos"
1681
1682
@dbus.service.signal(_interface, signature=u"o")
3147
1683
def ClientAdded(self, objpath):
3148
1684
"D-Bus signal"
3149
1685
pass
3150
1686
3151
@dbus.service.signal(_interface, signature="ss")
1687
@dbus.service.signal(_interface, signature=u"ss")
3152
1688
def ClientNotFound(self, fingerprint, address):
3153
1689
"D-Bus signal"
3154
1690
pass
3155
1691
3156
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3157
"true"})
3158
@dbus.service.signal(_interface, signature="os")
1692
@dbus.service.signal(_interface, signature=u"os")
3159
1693
def ClientRemoved(self, objpath, name):
3160
1694
"D-Bus signal"
3161
1695
pass
3162
1696
3163
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3164
"true"})
3165
@dbus.service.method(_interface, out_signature="ao")
1697
@dbus.service.method(_interface, out_signature=u"ao")
3166
1698
def GetAllClients(self):
3167
1699
"D-Bus method"
3168
return dbus.Array(c.dbus_object_path for c in
3169
tcp_server.clients.itervalues())
1700
return dbus.Array(c.dbus_object_path
1701
for c in tcp_server.clients)
3170
1702
3171
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3172
"true"})
3173
1703
@dbus.service.method(_interface,
3174
out_signature="a{oa{sv}}")
1704
out_signature=u"a{oa{sv}}")
3175
1705
def GetAllClientsWithProperties(self):
3176
1706
"D-Bus method"
3177
1707
return dbus.Dictionary(
3178
{ c.dbus_object_path: c.GetAll(
3179
"se.recompile.Mandos.Client")
3180
for c in tcp_server.clients.itervalues() },
3181
signature="oa{sv}")
1708
((c.dbus_object_path, c.GetAll(u""))
1709
for c in tcp_server.clients),
1710
signature=u"oa{sv}")
3182
1711
3183
@dbus.service.method(_interface, in_signature="o")
1712
@dbus.service.method(_interface, in_signature=u"o")
3184
1713
def RemoveClient(self, object_path):
3185
1714
"D-Bus method"
3186
for c in tcp_server.clients.itervalues():
1715
for c in tcp_server.clients:
3187
1716
if c.dbus_object_path == object_path:
3188
del tcp_server.clients[c.name]
1717
tcp_server.clients.remove(c)
3189
1718
c.remove_from_connection()
3190
# Don't signal the disabling
1719
# Don't signal anything except ClientRemoved
3191
1720
c.disable(quiet=True)
3192
# Emit D-Bus signal for removal
3193
self.client_removed_signal(c)
1721
# Emit D-Bus signal
1722
self.ClientRemoved(object_path, c.name)
3194
1723
return
3195
1724
raise KeyError(object_path)
3196
1725
3197
1726
del _interface
3198
3199
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3200
out_signature = "a{oa{sa{sv}}}")
3201
def GetManagedObjects(self):
3202
"""D-Bus method"""
3203
return dbus.Dictionary(
3204
{ client.dbus_object_path:
3205
dbus.Dictionary(
3206
{ interface: client.GetAll(interface)
3207
for interface in
3208
client._get_all_interface_names()})
3209
for client in tcp_server.clients.values()})
3210
3211
def client_added_signal(self, client):
3212
"""Send the new standard signal and the old signal"""
3213
if use_dbus:
3214
# New standard signal
3215
self.InterfacesAdded(
3216
client.dbus_object_path,
3217
dbus.Dictionary(
3218
{ interface: client.GetAll(interface)
3219
for interface in
3220
client._get_all_interface_names()}))
3221
# Old signal
3222
self.ClientAdded(client.dbus_object_path)
3223
3224
def client_removed_signal(self, client):
3225
"""Send the new standard signal and the old signal"""
3226
if use_dbus:
3227
# New standard signal
3228
self.InterfacesRemoved(
3229
client.dbus_object_path,
3230
client._get_all_interface_names())
3231
# Old signal
3232
self.ClientRemoved(client.dbus_object_path,
3233
client.name)
3234
1727
3235
1728
mandos_dbus_service = MandosDBusService()
3236
1729
3237
1730
def cleanup():
3238
1731
"Cleanup function; run on exit"
3239
if zeroconf:
3240
service.cleanup()
3241
3242
multiprocessing.active_children()
3243
wnull.close()
3244
if not (tcp_server.clients or client_settings):
3245
return
3246
3247
# Store client before exiting. Secrets are encrypted with key
3248
# based on what config file has. If config file is
3249
# removed/edited, old secret will thus be unrecovable.
3250
clients = {}
3251
with PGPEngine() as pgp:
3252
for client in tcp_server.clients.itervalues():
3253
key = client_settings[client.name]["secret"]
3254
client.encrypted_secret = pgp.encrypt(client.secret,
3255
key)
3256
client_dict = {}
3257
3258
# A list of attributes that can not be pickled
3259
# + secret.
3260
exclude = { "bus", "changedstate", "secret",
3261
"checker", "server_settings" }
3262
for name, typ in inspect.getmembers(dbus.service
3263
.Object):
3264
exclude.add(name)
3265
3266
client_dict["encrypted_secret"] = (client
3267
.encrypted_secret)
3268
for attr in client.client_structure:
3269
if attr not in exclude:
3270
client_dict[attr] = getattr(client, attr)
3271
3272
clients[client.name] = client_dict
3273
del client_settings[client.name]["secret"]
3274
3275
try:
3276
with tempfile.NamedTemporaryFile(
3277
mode='wb',
3278
suffix=".pickle",
3279
prefix='clients-',
3280
dir=os.path.dirname(stored_state_path),
3281
delete=False) as stored_state:
3282
pickle.dump((clients, client_settings), stored_state)
3283
tempname = stored_state.name
3284
os.rename(tempname, stored_state_path)
3285
except (IOError, OSError) as e:
3286
if not debug:
3287
try:
3288
os.remove(tempname)
3289
except NameError:
3290
pass
3291
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3292
logger.warning("Could not save persistent state: {}"
3293
.format(os.strerror(e.errno)))
3294
else:
3295
logger.warning("Could not save persistent state:",
3296
exc_info=e)
3297
raise
3298
3299
# Delete all clients, and settings from config
1732
service.cleanup()
1733
3300
1734
while tcp_server.clients:
3301
name, client = tcp_server.clients.popitem()
1735
client = tcp_server.clients.pop()
3302
1736
if use_dbus:
3303
1737
client.remove_from_connection()
3304
# Don't signal the disabling
1738
client.disable_hook = None
1739
# Don't signal anything except ClientRemoved
3305
1740
client.disable(quiet=True)
3306
# Emit D-Bus signal for removal
3307
1741
if use_dbus:
3308
mandos_dbus_service.client_removed_signal(client)
3309
client_settings.clear()
1742
# Emit D-Bus signal
1743
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1744
client.name)
3310
1745
3311
1746
atexit.register(cleanup)
3312
1747
3313
for client in tcp_server.clients.itervalues():
1748
for client in tcp_server.clients:
3314
1749
if use_dbus:
3315
# Emit D-Bus signal for adding
3316
mandos_dbus_service.client_added_signal(client)
3317
# Need to initiate checking of clients
3318
if client.enabled:
3319
client.init_checker()
1750
# Emit D-Bus signal
1751
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1752
client.enable()
3320
1753
3321
1754
tcp_server.enable()
3322
1755
tcp_server.server_activate()
3323
1756
3324
1757
# Find out what port we got
3325
if zeroconf:
3326
service.port = tcp_server.socket.getsockname()[1]
1758
service.port = tcp_server.socket.getsockname()[1]
3327
1759
if use_ipv6:
3328
logger.info("Now listening on address %r, port %d,"
3329
" flowinfo %d, scope_id %d",
3330
*tcp_server.socket.getsockname())
1760
logger.info(u"Now listening on address %r, port %d,"
1761
" flowinfo %d, scope_id %d"
1762
% tcp_server.socket.getsockname())
3331
1763
else: # IPv4
3332
logger.info("Now listening on address %r, port %d",
3333
*tcp_server.socket.getsockname())
1764
logger.info(u"Now listening on address %r, port %d"
1765
% tcp_server.socket.getsockname())
3334
1766
3335
1767
#service.interface = tcp_server.socket.getsockname()[3]
3336
1768
3337
1769
try:
3338
if zeroconf:
3339
# From the Avahi example code
3340
try:
3341
service.activate()
3342
except dbus.exceptions.DBusException as error:
3343
logger.critical("D-Bus Exception", exc_info=error)
3344
cleanup()
3345
sys.exit(1)
3346
# End of Avahi example code
1770
# From the Avahi example code
1771
try:
1772
service.activate()
1773
except dbus.exceptions.DBusException, error:
1774
logger.critical(u"DBusException: %s", error)
1775
cleanup()
1776
sys.exit(1)
1777
# End of Avahi example code
3347
1778
3348
1779
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
3349
1780
lambda *args, **kwargs:
3350
1781
(tcp_server.handle_request
3351
1782
(*args[2:], **kwargs) or True))
3352
1783
3353
logger.debug("Starting main loop")
1784
logger.debug(u"Starting main loop")
3354
1785
main_loop.run()
3355
except AvahiError as error:
3356
logger.critical("Avahi Error", exc_info=error)
1786
except AvahiError, error:
1787
logger.critical(u"AvahiError: %s", error)
3357
1788
cleanup()
3358
1789
sys.exit(1)
3359
1790
except KeyboardInterrupt:
3360
1791
if debug:
3361
print("", file=sys.stderr)
3362
logger.debug("Server received KeyboardInterrupt")
3363
logger.debug("Server exiting")
1792
print >> sys.stderr
1793
logger.debug(u"Server received KeyboardInterrupt")
1794
logger.debug(u"Server exiting")
3364
1795
# Must run before the D-Bus bus name gets deregistered
3365
1796
cleanup()
3366
1797
3367
3368
1798
if __name__ == '__main__':
3369
1799
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0