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- Committer: Teddy Hogeborn
- Date: 2009-11-19 18:31:28 UTC
- Revision ID: teddy@fukt.bsnet.se-20091119183128-ttstewh61xmtnil1
* Makefile (LINK_FORTIFY_LD): Bug fix: removed "-fPIE".
* mandos-keygen: Bug fix: Fix quoting for the "--password" option.
* mandos-keygen: Bug fix: Fix quoting for the "--password" option.
- 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
58
55
import logging
59
56
import logging.handlers
60
57
import pwd
61
import contextlib
58
from contextlib import closing
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
76
62
77
63
import dbus
78
64
import dbus.service
79
try:
80
import gobject
81
except ImportError:
82
from gi.repository import GObject as gobject
65
import gobject
83
66
import avahi
84
67
from dbus.mainloop.glib import DBusGMainLoop
85
68
import ctypes
95
78
except ImportError:
96
79
SO_BINDTODEVICE = None
97
80
98
if sys.version_info.major == 2:
99
str = unicode
100
101
version = "1.7.1"
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
81
82
version = "1.0.14"
83
84
logger = logging.Logger(u'mandos')
85
syslogger = (logging.handlers.SysLogHandler
86
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
87
address = "/dev/log"))
88
syslogger.setFormatter(logging.Formatter
89
(u'Mandos [%(process)d]: %(levelname)s:'
90
u' %(message)s'))
91
logger.addHandler(syslogger)
92
93
console = logging.StreamHandler()
94
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
95
u' %(levelname)s:'
96
u' %(message)s'))
97
logger.addHandler(console)
241
98
242
99
class AvahiError(Exception):
243
100
def __init__(self, value, *args, **kwargs):
244
101
self.value = value
245
return super(AvahiError, self).__init__(value, *args,
246
**kwargs)
247
102
super(AvahiError, self).__init__(value, *args, **kwargs)
103
def __unicode__(self):
104
return unicode(repr(self.value))
248
105
249
106
class AvahiServiceError(AvahiError):
250
107
pass
251
108
252
253
109
class AvahiGroupError(AvahiError):
254
110
pass
255
111
260
116
Attributes:
261
117
interface: integer; avahi.IF_UNSPEC or an interface index.
262
118
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>
119
name: string; Example: u'Mandos'
120
type: string; Example: u'_mandos._tcp'.
121
See <http://www.dns-sd.org/ServiceTypes.html>
266
122
port: integer; what port to announce
267
123
TXT: list of strings; TXT record for the service
268
124
domain: string; Domain to publish on, default to .local if empty.
274
130
server: D-Bus Server
275
131
bus: dbus.SystemBus()
276
132
"""
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):
133
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
134
servicetype = None, port = None, TXT = None,
135
domain = u"", host = u"", max_renames = 32768,
136
protocol = avahi.PROTO_UNSPEC, bus = None):
289
137
self.interface = interface
290
138
self.name = name
291
139
self.type = servicetype
299
147
self.group = None # our entry group
300
148
self.server = None
301
149
self.bus = bus
302
self.entry_group_state_changed_match = None
303
304
def rename(self, remove=True):
150
def rename(self):
305
151
"""Derived from the Avahi example code"""
306
152
if self.rename_count >= self.max_renames:
307
logger.critical("No suitable Zeroconf service name found"
308
" after %i retries, exiting.",
153
logger.critical(u"No suitable Zeroconf service name found"
154
u" after %i retries, exiting.",
309
155
self.rename_count)
310
raise AvahiServiceError("Too many renames")
311
self.name = str(
312
self.server.GetAlternativeServiceName(self.name))
156
raise AvahiServiceError(u"Too many renames")
157
self.name = self.server.GetAlternativeServiceName(self.name)
158
logger.info(u"Changing Zeroconf service name to %r ...",
159
unicode(self.name))
160
syslogger.setFormatter(logging.Formatter
161
(u'Mandos (%s) [%%(process)d]:'
162
u' %%(levelname)s: %%(message)s'
163
% self.name))
164
self.remove()
165
self.add()
313
166
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
167
def remove(self):
331
168
"""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
169
if self.group is not None:
336
170
self.group.Reset()
337
338
171
def add(self):
339
172
"""Derived from the Avahi example code"""
340
self.remove()
341
173
if self.group is None:
342
174
self.group = dbus.Interface(
343
175
self.bus.get_object(avahi.DBUS_NAME,
344
176
self.server.EntryGroupNew()),
345
177
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' ...",
178
self.group.connect_to_signal('StateChanged',
179
self
180
.entry_group_state_changed)
181
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
350
182
self.name, self.type)
351
183
self.group.AddService(
352
184
self.interface,
357
189
dbus.UInt16(self.port),
358
190
avahi.string_array_to_txt_array(self.TXT))
359
191
self.group.Commit()
360
361
192
def entry_group_state_changed(self, state, error):
362
193
"""Derived from the Avahi example code"""
363
logger.debug("Avahi entry group state change: %i", state)
194
logger.debug(u"Avahi state change: %i", state)
364
195
365
196
if state == avahi.ENTRY_GROUP_ESTABLISHED:
366
logger.debug("Zeroconf service established.")
197
logger.debug(u"Zeroconf service established.")
367
198
elif state == avahi.ENTRY_GROUP_COLLISION:
368
logger.info("Zeroconf service name collision.")
199
logger.warning(u"Zeroconf service name collision.")
369
200
self.rename()
370
201
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
202
logger.critical(u"Avahi: Error in group state changed %s",
203
unicode(error))
204
raise AvahiGroupError(u"State changed: %s"
205
% unicode(error))
375
206
def cleanup(self):
376
207
"""Derived from the Avahi example code"""
377
208
if self.group is not None:
378
try:
379
self.group.Free()
380
except (dbus.exceptions.UnknownMethodException,
381
dbus.exceptions.DBusException):
382
pass
209
self.group.Free()
383
210
self.group = None
384
self.remove()
385
386
def server_state_changed(self, state, error=None):
211
def server_state_changed(self, state):
387
212
"""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()
213
if state == avahi.SERVER_COLLISION:
214
logger.error(u"Zeroconf server name collision")
215
self.remove()
402
216
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
217
self.add()
421
218
def activate(self):
422
219
"""Derived from the Avahi example code"""
423
220
if self.server is None:
424
221
self.server = dbus.Interface(
425
222
self.bus.get_object(avahi.DBUS_NAME,
426
avahi.DBUS_PATH_SERVER,
427
follow_name_owner_changes=True),
223
avahi.DBUS_PATH_SERVER),
428
224
avahi.DBUS_INTERFACE_SERVER)
429
self.server.connect_to_signal("StateChanged",
430
self.server_state_changed)
225
self.server.connect_to_signal(u"StateChanged",
226
self.server_state_changed)
431
227
self.server_state_changed(self.server.GetState())
432
228
433
229
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
230
class Client(object):
709
231
"""A representation of a client host served by this server.
710
232
711
233
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
234
name: string; from the config file, used in log messages and
235
D-Bus identifiers
236
fingerprint: string (40 or 32 hexadecimal digits); used to
237
uniquely identify the client
238
secret: bytestring; sent verbatim (over TLS) to client
239
host: string; available for use by the checker command
240
created: datetime.datetime(); (UTC) object creation
241
last_enabled: datetime.datetime(); (UTC)
242
enabled: bool()
243
last_checked_ok: datetime.datetime(); (UTC) or None
244
timeout: datetime.timedelta(); How long from last_checked_ok
245
until this client is invalid
246
interval: datetime.timedelta(); How often to start a new checker
247
disable_hook: If set, called by disable() as disable_hook(self)
715
248
checker: subprocess.Popen(); a running checker process used
716
249
to see if the client lives.
717
250
'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
251
checker_initiator_tag: a gobject event source tag, or None
252
disable_initiator_tag: - '' -
253
checker_callback_tag: - '' -
254
checker_command: string; External command which is run to check if
255
client lives. %() expansions are done at
721
256
runtime with vars(self) as dict, so that for
722
257
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
258
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
259
"""
753
260
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
261
@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):
262
def _timedelta_to_milliseconds(td):
263
"Convert a datetime.timedelta() to milliseconds"
264
return ((td.days * 24 * 60 * 60 * 1000)
265
+ (td.seconds * 1000)
266
+ (td.microseconds // 1000))
267
268
def timeout_milliseconds(self):
269
"Return the 'timeout' attribute in milliseconds"
270
return self._timedelta_to_milliseconds(self.timeout)
271
272
def interval_milliseconds(self):
273
"Return the 'interval' attribute in milliseconds"
274
return self._timedelta_to_milliseconds(self.interval)
275
276
def __init__(self, name = None, disable_hook=None, config=None):
277
"""Note: the 'checker' key in 'config' sets the
278
'checker_command' attribute and *not* the 'checker'
279
attribute."""
822
280
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)
281
if config is None:
282
config = {}
283
logger.debug(u"Creating client %r", self.name)
284
# Uppercase and remove spaces from fingerprint for later
285
# comparison purposes with return value from the fingerprint()
286
# function
287
self.fingerprint = (config[u"fingerprint"].upper()
288
.replace(u" ", u""))
289
logger.debug(u" Fingerprint: %s", self.fingerprint)
290
if u"secret" in config:
291
self.secret = config[u"secret"].decode(u"base64")
292
elif u"secfile" in config:
293
with closing(open(os.path.expanduser
294
(os.path.expandvars
295
(config[u"secfile"])),
296
"rb")) as secfile:
297
self.secret = secfile.read()
836
298
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
299
raise TypeError(u"No secret or secfile for client %s"
300
% self.name)
301
self.host = config.get(u"host", u"")
302
self.created = datetime.datetime.utcnow()
303
self.enabled = False
304
self.last_enabled = None
305
self.last_checked_ok = None
306
self.timeout = string_to_delta(config[u"timeout"])
307
self.interval = string_to_delta(config[u"interval"])
308
self.disable_hook = disable_hook
846
309
self.checker = None
847
310
self.checker_initiator_tag = None
848
311
self.disable_initiator_tag = None
849
312
self.checker_callback_tag = None
313
self.checker_command = config[u"checker"]
850
314
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()
315
self.last_connect = None
869
316
870
317
def enable(self):
871
318
"""Start this client's checker and timeout hooks"""
872
if getattr(self, "enabled", False):
319
if getattr(self, u"enabled", False):
873
320
# Already enabled
874
321
return
875
self.expires = datetime.datetime.utcnow() + self.timeout
876
self.enabled = True
877
322
self.last_enabled = datetime.datetime.utcnow()
878
self.init_checker()
879
self.send_changedstate()
323
# Schedule a new checker to be started an 'interval' from now,
324
# and every interval from then on.
325
self.checker_initiator_tag = (gobject.timeout_add
326
(self.interval_milliseconds(),
327
self.start_checker))
328
# Schedule a disable() when 'timeout' has passed
329
self.disable_initiator_tag = (gobject.timeout_add
330
(self.timeout_milliseconds(),
331
self.disable))
332
self.enabled = True
333
# Also start a new checker *right now*.
334
self.start_checker()
880
335
881
336
def disable(self, quiet=True):
882
337
"""Disable this client."""
883
338
if not getattr(self, "enabled", False):
884
339
return False
885
340
if not quiet:
886
logger.info("Disabling client %s", self.name)
887
if getattr(self, "disable_initiator_tag", None) is not None:
341
logger.info(u"Disabling client %s", self.name)
342
if getattr(self, u"disable_initiator_tag", False):
888
343
gobject.source_remove(self.disable_initiator_tag)
889
344
self.disable_initiator_tag = None
890
self.expires = None
891
if getattr(self, "checker_initiator_tag", None) is not None:
345
if getattr(self, u"checker_initiator_tag", False):
892
346
gobject.source_remove(self.checker_initiator_tag)
893
347
self.checker_initiator_tag = None
894
348
self.stop_checker()
349
if self.disable_hook:
350
self.disable_hook(self)
895
351
self.enabled = False
896
if not quiet:
897
self.send_changedstate()
898
352
# Do not run this again if called by a gobject.timeout_add
899
353
return False
900
354
901
355
def __del__(self):
356
self.disable_hook = None
902
357
self.disable()
903
358
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):
359
def checker_callback(self, pid, condition, command):
922
360
"""The checker has completed, so take appropriate actions."""
923
361
self.checker_callback_tag = None
924
362
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",
363
if os.WIFEXITED(condition):
364
exitstatus = os.WEXITSTATUS(condition)
365
if exitstatus == 0:
366
logger.info(u"Checker for %(name)s succeeded",
934
367
vars(self))
935
368
self.checked_ok()
936
369
else:
937
logger.info("Checker for %(name)s failed", vars(self))
370
logger.info(u"Checker for %(name)s failed",
371
vars(self))
938
372
else:
939
self.last_checker_status = -1
940
self.last_checker_signal = -returncode
941
logger.warning("Checker for %(name)s crashed?",
373
logger.warning(u"Checker for %(name)s crashed?",
942
374
vars(self))
943
return False
944
375
945
376
def checked_ok(self):
946
"""Assert that the client has been seen, alive and well."""
377
"""Bump up the timeout for this client.
378
379
This should only be called when the client has been seen,
380
alive and well.
381
"""
947
382
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()
383
gobject.source_remove(self.disable_initiator_tag)
384
self.disable_initiator_tag = (gobject.timeout_add
385
(self.timeout_milliseconds(),
386
self.disable))
966
387
967
388
def start_checker(self):
968
389
"""Start a new checker subprocess if one is not running.
970
391
If a checker already exists, leave it running and do
971
392
nothing."""
972
393
# 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
394
# did that, then if a checker (for some reason) started
395
# running slowly and taking more than 'interval' time, the
396
# client would inevitably timeout, since no checker would get
397
# a chance to run to completion. If we instead leave running
977
398
# checkers alone, the checker would have to take more time
978
# than 'timeout' for the client to be disabled, which is as it
979
# should be.
399
# than 'timeout' for the client to be declared invalid, which
400
# is as it should be.
980
401
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
402
# If a checker exists, make sure it is not a zombie
403
try:
404
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
405
except (AttributeError, OSError), error:
406
if (isinstance(error, OSError)
407
and error.errno != errno.ECHILD):
408
raise error
409
else:
410
if pid:
411
logger.warning(u"Checker was a zombie")
412
gobject.source_remove(self.checker_callback_tag)
413
self.checker_callback(pid, status,
414
self.current_checker_command)
985
415
# Start a new checker if needed
986
416
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
417
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
418
# In case checker_command has exactly one % operator
419
command = self.checker_command % self.host
420
except TypeError:
421
# Escape attributes for the shell
422
escaped_attrs = dict((key,
423
re.escape(unicode(str(val),
424
errors=
425
u'replace')))
426
for key, val in
427
vars(self).iteritems())
428
try:
429
command = self.checker_command % escaped_attrs
430
except TypeError, error:
431
logger.error(u'Could not format string "%s":'
432
u' %s', self.checker_command, error)
433
return True # Try again later
998
434
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)
435
try:
436
logger.info(u"Starting checker %r for %s",
437
command, self.name)
438
# We don't need to redirect stdout and stderr, since
439
# in normal mode, that is already done by daemon(),
440
# and in debug mode we don't want to. (Stdin is
441
# always replaced by /dev/null.)
442
self.checker = subprocess.Popen(command,
443
close_fds=True,
444
shell=True, cwd=u"/")
445
self.checker_callback_tag = (gobject.child_watch_add
446
(self.checker.pid,
447
self.checker_callback,
448
data=command))
449
# The checker may have completed before the gobject
450
# watch was added. Check for this.
451
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
452
if pid:
453
gobject.source_remove(self.checker_callback_tag)
454
self.checker_callback(pid, status, command)
455
except OSError, error:
456
logger.error(u"Failed to start subprocess: %s",
457
error)
1024
458
# Re-run this periodically if run by gobject.timeout_add
1025
459
return True
1026
460
1029
463
if self.checker_callback_tag:
1030
464
gobject.source_remove(self.checker_callback_tag)
1031
465
self.checker_callback_tag = None
1032
if getattr(self, "checker", None) is None:
466
if getattr(self, u"checker", None) is None:
1033
467
return
1034
logger.debug("Stopping checker for %(name)s", vars(self))
1035
self.checker.terminate()
468
logger.debug(u"Stopping checker for %(name)s", vars(self))
469
try:
470
os.kill(self.checker.pid, signal.SIGTERM)
471
#time.sleep(0.5)
472
#if self.checker.poll() is None:
473
# os.kill(self.checker.pid, signal.SIGKILL)
474
except OSError, error:
475
if error.errno != errno.ESRCH: # No such process
476
raise
1036
477
self.checker = None
1037
1038
1039
def dbus_service_property(dbus_interface,
1040
signature="v",
1041
access="readwrite",
1042
byte_arrays=False):
478
479
def still_valid(self):
480
"""Has the timeout not yet passed for this client?"""
481
if not getattr(self, u"enabled", False):
482
return False
483
now = datetime.datetime.utcnow()
484
if self.last_checked_ok is None:
485
return now < (self.created + self.timeout)
486
else:
487
return now < (self.last_checked_ok + self.timeout)
488
489
490
def dbus_service_property(dbus_interface, signature=u"v",
491
access=u"readwrite", byte_arrays=False):
1043
492
"""Decorators for marking methods of a DBusObjectWithProperties to
1044
493
become properties on the D-Bus.
1045
494
1050
499
dbus.service.method, except there is only "signature", since the
1051
500
type from Get() and the type sent to Set() is the same.
1052
501
"""
1053
# Encoding deeply encoded byte arrays is not supported yet by the
1054
# "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
1059
502
def decorator(func):
1060
503
func._dbus_is_property = True
1061
504
func._dbus_interface = dbus_interface
1062
505
func._dbus_signature = signature
1063
506
func._dbus_access = access
1064
507
func._dbus_name = func.__name__
1065
if func._dbus_name.endswith("_dbus_property"):
508
if func._dbus_name.endswith(u"_dbus_property"):
1066
509
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
510
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
511
return func
1113
512
return decorator
1114
513
1115
514
1116
515
class DBusPropertyException(dbus.exceptions.DBusException):
1117
516
"""A base class for D-Bus property-related exceptions
1118
517
"""
1119
pass
518
def __unicode__(self):
519
return unicode(str(self))
1120
520
1121
521
1122
522
class DBusPropertyAccessException(DBusPropertyException):
1131
531
pass
1132
532
1133
533
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):
534
class DBusObjectWithProperties(dbus.service.Object):
1224
535
"""A D-Bus object with properties.
1225
536
1226
537
Classes inheriting from this can use the dbus_service_property
1227
538
decorator to expose methods as D-Bus properties. It exposes the
1228
539
standard Get(), Set(), and GetAll() methods on the D-Bus.
1229
540
"""
1230
541
542
@staticmethod
543
def _is_dbus_property(obj):
544
return getattr(obj, u"_dbus_is_property", False)
545
546
def _get_all_dbus_properties(self):
547
"""Returns a generator of (name, attribute) pairs
548
"""
549
return ((prop._dbus_name, prop)
550
for name, prop in
551
inspect.getmembers(self, self._is_dbus_property))
552
1231
553
def _get_dbus_property(self, interface_name, property_name):
1232
554
"""Returns a bound method if one exists which is a D-Bus
1233
555
property with the specified name and interface.
1234
556
"""
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
557
for name in (property_name,
558
property_name + u"_dbus_property"):
559
prop = getattr(self, name, None)
560
if (prop is None
561
or not self._is_dbus_property(prop)
562
or prop._dbus_name != property_name
563
or (interface_name and prop._dbus_interface
564
and interface_name != prop._dbus_interface)):
565
continue
566
return prop
1242
567
# 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")
568
raise DBusPropertyNotFound(self.dbus_object_path + u":"
569
+ interface_name + u"."
570
+ property_name)
571
572
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
573
out_signature=u"v")
1258
574
def Get(self, interface_name, property_name):
1259
575
"""Standard D-Bus property Get() method, see D-Bus standard.
1260
576
"""
1261
577
prop = self._get_dbus_property(interface_name, property_name)
1262
if prop._dbus_access == "write":
578
if prop._dbus_access == u"write":
1263
579
raise DBusPropertyAccessException(property_name)
1264
580
value = prop()
1265
if not hasattr(value, "variant_level"):
581
if not hasattr(value, u"variant_level"):
1266
582
return value
1267
583
return type(value)(value, variant_level=value.variant_level+1)
1268
584
1269
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
585
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
1270
586
def Set(self, interface_name, property_name, value):
1271
587
"""Standard D-Bus property Set() method, see D-Bus standard.
1272
588
"""
1273
589
prop = self._get_dbus_property(interface_name, property_name)
1274
if prop._dbus_access == "read":
590
if prop._dbus_access == u"read":
1275
591
raise DBusPropertyAccessException(property_name)
1276
if prop._dbus_get_args_options["byte_arrays"]:
1277
# The byte_arrays option is not supported yet on
1278
# 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))
592
if prop._dbus_get_args_options[u"byte_arrays"]:
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()
1813
1814
## D-Bus methods, signals & properties
1815
1816
## Interfaces
1817
1818
## Signals
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
783
784
## D-Bus methods & signals
785
_interface = u"se.bsnet.fukt.Mandos.Client"
786
787
# CheckedOK - method
788
@dbus.service.method(_interface)
789
def CheckedOK(self):
790
return self.checked_ok()
1819
791
1820
792
# CheckerCompleted - signal
1821
@dbus.service.signal(_interface, signature="nxs")
793
@dbus.service.signal(_interface, signature=u"nxs")
1822
794
def CheckerCompleted(self, exitcode, waitstatus, command):
1823
795
"D-Bus signal"
1824
796
pass
1825
797
1826
798
# CheckerStarted - signal
1827
@dbus.service.signal(_interface, signature="s")
799
@dbus.service.signal(_interface, signature=u"s")
1828
800
def CheckerStarted(self, command):
1829
801
"D-Bus signal"
1830
802
pass
1831
803
1832
804
# PropertyChanged - signal
1833
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1834
@dbus.service.signal(_interface, signature="sv")
805
@dbus.service.signal(_interface, signature=u"sv")
1835
806
def PropertyChanged(self, property, value):
1836
807
"D-Bus signal"
1837
808
pass
1839
810
# GotSecret - signal
1840
811
@dbus.service.signal(_interface)
1841
812
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
"""
813
"D-Bus signal"
1846
814
pass
1847
815
1848
816
# Rejected - signal
1849
@dbus.service.signal(_interface, signature="s")
1850
def Rejected(self, reason):
817
@dbus.service.signal(_interface)
818
def Rejected(self):
1851
819
"D-Bus signal"
1852
820
pass
1853
821
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
## Methods
1861
1862
# Approve - method
1863
@dbus.service.method(_interface, in_signature="b")
1864
def Approve(self, value):
1865
self.approve(value)
1866
1867
# CheckedOK - method
1868
@dbus.service.method(_interface)
1869
def CheckedOK(self):
1870
self.checked_ok()
1871
1872
822
# Enable - method
1873
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1874
823
@dbus.service.method(_interface)
1875
824
def Enable(self):
1876
825
"D-Bus method"
1877
826
self.enable()
1878
827
1879
828
# StartChecker - method
1880
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1881
829
@dbus.service.method(_interface)
1882
830
def StartChecker(self):
1883
831
"D-Bus method"
1884
832
self.start_checker()
1885
833
1886
834
# Disable - method
1887
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1888
835
@dbus.service.method(_interface)
1889
836
def Disable(self):
1890
837
"D-Bus method"
1891
838
self.disable()
1892
839
1893
840
# StopChecker - method
1894
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1895
841
@dbus.service.method(_interface)
1896
842
def StopChecker(self):
1897
843
self.stop_checker()
1898
844
1899
## Properties
1900
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):
845
# name - property
846
@dbus_service_property(_interface, signature=u"s", access=u"read")
847
def name_dbus_property(self):
1940
848
return dbus.String(self.name)
1941
849
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):
850
# fingerprint - property
851
@dbus_service_property(_interface, signature=u"s", access=u"read")
852
def fingerprint_dbus_property(self):
1947
853
return dbus.String(self.fingerprint)
1948
854
1949
# Host - property
1950
@dbus_service_property(_interface,
1951
signature="s",
1952
access="readwrite")
1953
def Host_dbus_property(self, value=None):
855
# host - property
856
@dbus_service_property(_interface, signature=u"s",
857
access=u"readwrite")
858
def host_dbus_property(self, value=None):
1954
859
if value is None: # get
1955
860
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):
861
self.host = value
862
# Emit D-Bus signal
863
self.PropertyChanged(dbus.String(u"host"),
864
dbus.String(value, variant_level=1))
865
866
# created - property
867
@dbus_service_property(_interface, signature=u"s", access=u"read")
868
def created_dbus_property(self):
869
return dbus.String(self._datetime_to_dbus(self.created))
870
871
# last_enabled - property
872
@dbus_service_property(_interface, signature=u"s", access=u"read")
873
def last_enabled_dbus_property(self):
874
if self.last_enabled is None:
875
return dbus.String(u"")
876
return dbus.String(self._datetime_to_dbus(self.last_enabled))
877
878
# enabled - property
879
@dbus_service_property(_interface, signature=u"b",
880
access=u"readwrite")
881
def enabled_dbus_property(self, value=None):
1975
882
if value is None: # get
1976
883
return dbus.Boolean(self.enabled)
1977
884
if value:
1979
886
else:
1980
887
self.disable()
1981
888
1982
# LastCheckedOK - property
1983
@dbus_service_property(_interface,
1984
signature="s",
1985
access="readwrite")
1986
def LastCheckedOK_dbus_property(self, value=None):
889
# last_checked_ok - property
890
@dbus_service_property(_interface, signature=u"s",
891
access=u"readwrite")
892
def last_checked_ok_dbus_property(self, value=None):
1987
893
if value is not None:
1988
894
self.checked_ok()
1989
895
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):
896
if self.last_checked_ok is None:
897
return dbus.String(u"")
898
return dbus.String(self._datetime_to_dbus(self
899
.last_checked_ok))
900
901
# timeout - property
902
@dbus_service_property(_interface, signature=u"t",
903
access=u"readwrite")
904
def timeout_dbus_property(self, value=None):
2012
905
if value is None: # get
2013
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2014
old_timeout = self.timeout
906
return dbus.UInt64(self.timeout_milliseconds())
2015
907
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)
908
# Emit D-Bus signal
909
self.PropertyChanged(dbus.String(u"timeout"),
910
dbus.UInt64(value, variant_level=1))
911
if getattr(self, u"disable_initiator_tag", None) is None:
912
return
913
# Reschedule timeout
914
gobject.source_remove(self.disable_initiator_tag)
915
self.disable_initiator_tag = None
916
time_to_die = (self.
917
_timedelta_to_milliseconds((self
918
.last_checked_ok
919
+ self.timeout)
920
- datetime.datetime
921
.utcnow()))
922
if time_to_die <= 0:
923
# The timeout has passed
924
self.disable()
925
else:
926
self.disable_initiator_tag = (gobject.timeout_add
927
(time_to_die, self.disable))
928
929
# interval - property
930
@dbus_service_property(_interface, signature=u"t",
931
access=u"readwrite")
932
def interval_dbus_property(self, value=None):
933
if value is None: # get
934
return dbus.UInt64(self.interval_milliseconds())
2049
935
self.interval = datetime.timedelta(0, 0, 0, value)
2050
if getattr(self, "checker_initiator_tag", None) is None:
936
# Emit D-Bus signal
937
self.PropertyChanged(dbus.String(u"interval"),
938
dbus.UInt64(value, variant_level=1))
939
if getattr(self, u"checker_initiator_tag", None) is None:
2051
940
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):
941
# Reschedule checker run
942
gobject.source_remove(self.checker_initiator_tag)
943
self.checker_initiator_tag = (gobject.timeout_add
944
(value, self.start_checker))
945
self.start_checker() # Start one now, too
946
947
# checker - property
948
@dbus_service_property(_interface, signature=u"s",
949
access=u"readwrite")
950
def checker_dbus_property(self, value=None):
2064
951
if value is None: # get
2065
952
return dbus.String(self.checker_command)
2066
self.checker_command = str(value)
953
self.checker_command = value
954
# Emit D-Bus signal
955
self.PropertyChanged(dbus.String(u"checker"),
956
dbus.String(self.checker_command,
957
variant_level=1))
2067
958
2068
# CheckerRunning - property
2069
@dbus_service_property(_interface,
2070
signature="b",
2071
access="readwrite")
2072
def CheckerRunning_dbus_property(self, value=None):
959
# checker_running - property
960
@dbus_service_property(_interface, signature=u"b",
961
access=u"readwrite")
962
def checker_running_dbus_property(self, value=None):
2073
963
if value is None: # get
2074
964
return dbus.Boolean(self.checker is not None)
2075
965
if value:
2077
967
else:
2078
968
self.stop_checker()
2079
969
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):
970
# object_path - property
971
@dbus_service_property(_interface, signature=u"o", access=u"read")
972
def object_path_dbus_property(self):
2086
973
return self.dbus_object_path # is already a dbus.ObjectPath
2087
974
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)
975
# secret = property
976
@dbus_service_property(_interface, signature=u"ay",
977
access=u"write", byte_arrays=True)
978
def secret_dbus_property(self, value):
979
self.secret = str(value)
2098
980
2099
981
del _interface
2100
982
2101
983
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
984
class ClientHandler(socketserver.BaseRequestHandler, object):
2131
985
"""A class to handle client connections.
2132
986
2134
988
Note: This will run in its own forked process."""
2135
989
2136
990
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"))
991
logger.info(u"TCP connection from: %s",
992
unicode(self.client_address))
993
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
994
# Open IPC pipe to parent process
995
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
996
session = (gnutls.connection
997
.ClientSession(self.request,
998
gnutls.connection
999
.X509Credentials()))
1000
1001
line = self.request.makefile().readline()
1002
logger.debug(u"Protocol version: %r", line)
1003
try:
1004
if int(line.strip().split()[0]) > 1:
1005
raise RuntimeError
1006
except (ValueError, IndexError, RuntimeError), error:
1007
logger.error(u"Unknown protocol version: %s", error)
1008
return
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)
2155
2156
# Start communication using the Mandos protocol
2157
# Get protocol number
2158
line = self.request.makefile().readline()
2159
logger.debug("Protocol version: %r", line)
2160
try:
2161
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)
2165
return
2166
2167
# Start GnuTLS connection
1022
priority = u"NORMAL"
1023
(gnutls.library.functions
1024
.gnutls_priority_set_direct(session._c_object,
1025
priority, None))
1026
2168
1027
try:
2169
1028
session.handshake()
2170
except gnutls.Error as error:
2171
logger.warning("Handshake failed: %s", error)
1029
except gnutls.errors.GNUTLSError, error:
1030
logger.warning(u"Handshake failed: %s", error)
2172
1031
# Do not run session.bye() here: the session is not
2173
1032
# established. Just abandon the request.
2174
1033
return
2175
logger.debug("Handshake succeeded")
2176
2177
approval_required = False
1034
logger.debug(u"Handshake succeeded")
2178
1035
try:
2179
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
2209
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()
1036
fpr = self.fingerprint(self.peer_certificate(session))
1037
except (TypeError, gnutls.errors.GNUTLSError), error:
1038
logger.warning(u"Bad certificate: %s", error)
1039
session.bye()
1040
return
1041
logger.debug(u"Fingerprint: %s", fpr)
2259
1042
2260
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)
1043
for c in self.server.clients:
1044
if c.fingerprint == fpr:
1045
client = c
1046
break
1047
else:
1048
ipc.write(u"NOTFOUND %s %s\n"
1049
% (fpr, unicode(self.client_address)))
1050
session.bye()
1051
return
1052
# Have to check if client.still_valid(), since it is
1053
# possible that the client timed out while establishing
1054
# the GnuTLS session.
1055
if not client.still_valid():
1056
ipc.write(u"INVALID %s\n" % client.name)
1057
session.bye()
1058
return
1059
ipc.write(u"SENDING %s\n" % client.name)
1060
sent_size = 0
1061
while sent_size < len(client.secret):
1062
sent = session.send(client.secret[sent_size:])
1063
logger.debug(u"Sent: %d, remaining: %d",
1064
sent, len(client.secret)
1065
- (sent_size + sent))
1066
sent_size += sent
1067
session.bye()
2268
1068
2269
1069
@staticmethod
2270
1070
def peer_certificate(session):
2271
1071
"Return the peer's OpenPGP certificate as a bytestring"
2272
1072
# 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""
1073
if (gnutls.library.functions
1074
.gnutls_certificate_type_get(session._c_object)
1075
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1076
# ...do the normal thing
1077
return session.peer_certificate
2277
1078
list_size = ctypes.c_uint(1)
2278
cert_list = (gnutls.certificate_get_peers
1079
cert_list = (gnutls.library.functions
1080
.gnutls_certificate_get_peers
2279
1081
(session._c_object, ctypes.byref(list_size)))
2280
1082
if not bool(cert_list) and list_size.value != 0:
2281
raise gnutls.Error("error getting peer certificate")
1083
raise gnutls.errors.GNUTLSError(u"error getting peer"
1084
u" certificate")
2282
1085
if list_size.value == 0:
2283
1086
return None
2284
1087
cert = cert_list[0]
2288
1091
def fingerprint(openpgp):
2289
1092
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2290
1093
# 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)))
1094
datum = (gnutls.library.types
1095
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1096
ctypes.POINTER
1097
(ctypes.c_ubyte)),
1098
ctypes.c_uint(len(openpgp))))
2295
1099
# New empty GnuTLS certificate
2296
crt = gnutls.openpgp_crt_t()
2297
gnutls.openpgp_crt_init(ctypes.byref(crt))
1100
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1101
(gnutls.library.functions
1102
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2298
1103
# Import the OpenPGP public key into the certificate
2299
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2300
gnutls.OPENPGP_FMT_RAW)
1104
(gnutls.library.functions
1105
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1106
gnutls.library.constants
1107
.GNUTLS_OPENPGP_FMT_RAW))
2301
1108
# Verify the self signature in the key
2302
1109
crtverify = ctypes.c_uint()
2303
gnutls.openpgp_crt_verify_self(crt, 0,
2304
ctypes.byref(crtverify))
1110
(gnutls.library.functions
1111
.gnutls_openpgp_crt_verify_self(crt, 0,
1112
ctypes.byref(crtverify)))
2305
1113
if crtverify.value != 0:
2306
gnutls.openpgp_crt_deinit(crt)
2307
raise gnutls.CertificateSecurityError("Verify failed")
1114
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1115
raise (gnutls.errors.CertificateSecurityError
1116
(u"Verify failed"))
2308
1117
# New buffer for the fingerprint
2309
1118
buf = ctypes.create_string_buffer(20)
2310
1119
buf_len = ctypes.c_size_t()
2311
1120
# Get the fingerprint from the certificate into the buffer
2312
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2313
ctypes.byref(buf_len))
1121
(gnutls.library.functions
1122
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1123
ctypes.byref(buf_len)))
2314
1124
# Deinit the certificate
2315
gnutls.openpgp_crt_deinit(crt)
1125
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2316
1126
# Convert the buffer to a Python bytestring
2317
1127
fpr = ctypes.string_at(buf, buf_len.value)
2318
1128
# Convert the bytestring to hexadecimal notation
2319
hex_fpr = binascii.hexlify(fpr).upper()
1129
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
2320
1130
return hex_fpr
2321
1131
2322
1132
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
1133
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1134
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
2344
1135
def process_request(self, request, client_address):
2345
1136
"""Overrides and wraps the original process_request().
2346
1137
2347
1138
This function creates a new pipe in self.pipe
2348
1139
"""
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):
1140
self.pipe = os.pipe()
1141
super(ForkingMixInWithPipe,
1142
self).process_request(request, client_address)
1143
os.close(self.pipe[1]) # close write end
1144
self.add_pipe(self.pipe[0])
1145
def add_pipe(self, pipe):
2357
1146
"""Dummy function; override as necessary"""
2358
raise NotImplementedError()
2359
2360
2361
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1147
os.close(pipe)
1148
1149
1150
class IPv6_TCPServer(ForkingMixInWithPipe,
2362
1151
socketserver.TCPServer, object):
2363
1152
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2364
1153
2367
1156
interface: None or a network interface name (string)
2368
1157
use_ipv6: Boolean; to use IPv6 or not
2369
1158
"""
2370
2371
1159
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
"""
1160
interface=None, use_ipv6=True):
2378
1161
self.interface = interface
2379
1162
if use_ipv6:
2380
1163
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
1164
socketserver.TCPServer.__init__(self, server_address,
2408
1165
RequestHandlerClass)
2409
2410
1166
def server_bind(self):
2411
1167
"""This overrides the normal server_bind() function
2412
1168
to bind to an interface if one was specified, and also NOT to
2413
1169
bind to an address or port if they were not specified."""
2414
1170
if self.interface is not None:
2415
1171
if SO_BINDTODEVICE is None:
2416
logger.error("SO_BINDTODEVICE does not exist;"
2417
" cannot bind to interface %s",
1172
logger.error(u"SO_BINDTODEVICE does not exist;"
1173
u" cannot bind to interface %s",
2418
1174
self.interface)
2419
1175
else:
2420
1176
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)
1177
self.socket.setsockopt(socket.SOL_SOCKET,
1178
SO_BINDTODEVICE,
1179
str(self.interface
1180
+ u'\0'))
1181
except socket.error, error:
1182
if error[0] == errno.EPERM:
1183
logger.error(u"No permission to"
1184
u" bind to interface %s",
1185
self.interface)
1186
elif error[0] == errno.ENOPROTOOPT:
1187
logger.error(u"SO_BINDTODEVICE not available;"
1188
u" cannot bind to interface %s",
1189
self.interface)
2435
1190
else:
2436
1191
raise
2437
1192
# Only bind(2) the socket if we really need to.
2438
1193
if self.server_address[0] or self.server_address[1]:
2439
1194
if not self.server_address[0]:
2440
1195
if self.address_family == socket.AF_INET6:
2441
any_address = "::" # in6addr_any
1196
any_address = u"::" # in6addr_any
2442
1197
else:
2443
any_address = "0.0.0.0" # INADDR_ANY
1198
any_address = socket.INADDR_ANY
2444
1199
self.server_address = (any_address,
2445
1200
self.server_address[1])
2446
1201
elif not self.server_address[1]:
2447
self.server_address = (self.server_address[0], 0)
1202
self.server_address = (self.server_address[0],
1203
0)
2448
1204
# if self.interface:
2449
1205
# self.server_address = (self.server_address[0],
2450
1206
# 0, # port
2464
1220
2465
1221
Assumes a gobject.MainLoop event loop.
2466
1222
"""
2467
2468
1223
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):
1224
interface=None, use_ipv6=True, clients=None,
1225
gnutls_priority=None, use_dbus=True):
2475
1226
self.enabled = False
2476
1227
self.clients = clients
2477
1228
if self.clients is None:
2478
self.clients = {}
1229
self.clients = set()
2479
1230
self.use_dbus = use_dbus
2480
1231
self.gnutls_priority = gnutls_priority
2481
1232
IPv6_TCPServer.__init__(self, server_address,
2482
1233
RequestHandlerClass,
2483
1234
interface = interface,
2484
use_ipv6 = use_ipv6,
2485
socketfd = socketfd)
2486
1235
use_ipv6 = use_ipv6)
2487
1236
def server_activate(self):
2488
1237
if self.enabled:
2489
1238
return socketserver.TCPServer.server_activate(self)
2490
2491
1239
def enable(self):
2492
1240
self.enabled = True
2493
2494
def add_pipe(self, parent_pipe, proc):
1241
def add_pipe(self, pipe):
2495
1242
# 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
1243
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1244
self.handle_ipc)
1245
def handle_ipc(self, source, condition, file_objects={}):
1246
condition_names = {
1247
gobject.IO_IN: u"IN", # There is data to read.
1248
gobject.IO_OUT: u"OUT", # Data can be written (without
1249
# blocking).
1250
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1251
gobject.IO_ERR: u"ERR", # Error condition.
1252
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1253
# broken, usually for pipes and
1254
# sockets).
1255
}
1256
conditions_string = ' | '.join(name
1257
for cond, name in
1258
condition_names.iteritems()
1259
if cond & condition)
1260
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1261
conditions_string)
1262
1263
# Turn the pipe file descriptor into a Python file object
1264
if source not in file_objects:
1265
file_objects[source] = os.fdopen(source, u"r", 1)
1266
1267
# Read a line from the file object
1268
cmdline = file_objects[source].readline()
1269
if not cmdline: # Empty line means end of file
1270
# close the IPC pipe
1271
file_objects[source].close()
1272
del file_objects[source]
1273
1274
# Stop calling this function
1275
return False
1276
1277
logger.debug(u"IPC command: %r", cmdline)
1278
1279
# Parse and act on command
1280
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1281
1282
if cmd == u"NOTFOUND":
1283
fpr, address = args.split(None, 1)
1284
logger.warning(u"Client not found for fingerprint: %s, ad"
1285
u"dress: %s", fpr, address)
1286
if self.use_dbus:
1287
# Emit D-Bus signal
1288
mandos_dbus_service.ClientNotFound(fpr, address)
1289
elif cmd == u"INVALID":
1290
for client in self.clients:
1291
if client.name == args:
1292
logger.warning(u"Client %s is invalid", args)
1293
if self.use_dbus:
1294
# Emit D-Bus signal
1295
client.Rejected()
1296
break
1297
else:
1298
logger.error(u"Unknown client %s is invalid", args)
1299
elif cmd == u"SENDING":
1300
for client in self.clients:
1301
if client.name == args:
1302
logger.info(u"Sending secret to %s", client.name)
1303
client.checked_ok()
1304
if self.use_dbus:
1305
# Emit D-Bus signal
1306
client.GotSecret()
1307
break
1308
else:
1309
logger.error(u"Sending secret to unknown client %s",
1310
args)
1311
else:
1312
logger.error(u"Unknown IPC command: %r", cmdline)
1313
1314
# Keep calling this function
2569
1315
return True
2570
1316
2571
1317
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
1318
def string_to_delta(interval):
2669
1319
"""Parse a string and return a datetime.timedelta
2670
1320
2671
>>> string_to_delta('7d')
1321
>>> string_to_delta(u'7d')
2672
1322
datetime.timedelta(7)
2673
>>> string_to_delta('60s')
1323
>>> string_to_delta(u'60s')
2674
1324
datetime.timedelta(0, 60)
2675
>>> string_to_delta('60m')
1325
>>> string_to_delta(u'60m')
2676
1326
datetime.timedelta(0, 3600)
2677
>>> string_to_delta('24h')
1327
>>> string_to_delta(u'24h')
2678
1328
datetime.timedelta(1)
2679
>>> string_to_delta('1w')
1329
>>> string_to_delta(u'1w')
2680
1330
datetime.timedelta(7)
2681
>>> string_to_delta('5m 30s')
1331
>>> string_to_delta(u'5m 30s')
2682
1332
datetime.timedelta(0, 330)
2683
1333
"""
2684
2685
try:
2686
return rfc3339_duration_to_delta(interval)
2687
except ValueError:
2688
pass
2689
2690
1334
timevalue = datetime.timedelta(0)
2691
1335
for s in interval.split():
2692
1336
try:
2693
suffix = s[-1]
1337
suffix = unicode(s[-1])
2694
1338
value = int(s[:-1])
2695
if suffix == "d":
1339
if suffix == u"d":
2696
1340
delta = datetime.timedelta(value)
2697
elif suffix == "s":
1341
elif suffix == u"s":
2698
1342
delta = datetime.timedelta(0, value)
2699
elif suffix == "m":
1343
elif suffix == u"m":
2700
1344
delta = datetime.timedelta(0, 0, 0, 0, value)
2701
elif suffix == "h":
1345
elif suffix == u"h":
2702
1346
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2703
elif suffix == "w":
1347
elif suffix == u"w":
2704
1348
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2705
1349
else:
2706
raise ValueError("Unknown suffix {!r}".format(suffix))
2707
except IndexError as e:
2708
raise ValueError(*(e.args))
1350
raise ValueError(u"Unknown suffix %r" % suffix)
1351
except (ValueError, IndexError), e:
1352
raise ValueError(e.message)
2709
1353
timevalue += delta
2710
1354
return timevalue
2711
1355
2712
1356
1357
def if_nametoindex(interface):
1358
"""Call the C function if_nametoindex(), or equivalent
1359
1360
Note: This function cannot accept a unicode string."""
1361
global if_nametoindex
1362
try:
1363
if_nametoindex = (ctypes.cdll.LoadLibrary
1364
(ctypes.util.find_library(u"c"))
1365
.if_nametoindex)
1366
except (OSError, AttributeError):
1367
logger.warning(u"Doing if_nametoindex the hard way")
1368
def if_nametoindex(interface):
1369
"Get an interface index the hard way, i.e. using fcntl()"
1370
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1371
with closing(socket.socket()) as s:
1372
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1373
struct.pack(str(u"16s16x"),
1374
interface))
1375
interface_index = struct.unpack(str(u"I"),
1376
ifreq[16:20])[0]
1377
return interface_index
1378
return if_nametoindex(interface)
1379
1380
2713
1381
def daemon(nochdir = False, noclose = False):
2714
1382
"""See daemon(3). Standard BSD Unix function.
2715
1383
2718
1386
sys.exit()
2719
1387
os.setsid()
2720
1388
if not nochdir:
2721
os.chdir("/")
1389
os.chdir(u"/")
2722
1390
if os.fork():
2723
1391
sys.exit()
2724
1392
if not noclose:
2725
1393
# Close all standard open file descriptors
2726
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1394
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2727
1395
if not stat.S_ISCHR(os.fstat(null).st_mode):
2728
1396
raise OSError(errno.ENODEV,
2729
"{} not a character device"
2730
.format(os.devnull))
1397
u"%s not a character device"
1398
% os.path.devnull)
2731
1399
os.dup2(null, sys.stdin.fileno())
2732
1400
os.dup2(null, sys.stdout.fileno())
2733
1401
os.dup2(null, sys.stderr.fileno())
2740
1408
##################################################################
2741
1409
# Parsing of options, both command line and config file
2742
1410
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()
1411
parser = optparse.OptionParser(version = "%%prog %s" % version)
1412
parser.add_option("-i", u"--interface", type=u"string",
1413
metavar="IF", help=u"Bind to interface IF")
1414
parser.add_option("-a", u"--address", type=u"string",
1415
help=u"Address to listen for requests on")
1416
parser.add_option("-p", u"--port", type=u"int",
1417
help=u"Port number to receive requests on")
1418
parser.add_option("--check", action=u"store_true",
1419
help=u"Run self-test")
1420
parser.add_option("--debug", action=u"store_true",
1421
help=u"Debug mode; run in foreground and log to"
1422
u" terminal")
1423
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1424
u" priority string (see GnuTLS documentation)")
1425
parser.add_option("--servicename", type=u"string",
1426
metavar=u"NAME", help=u"Zeroconf service name")
1427
parser.add_option("--configdir", type=u"string",
1428
default=u"/etc/mandos", metavar=u"DIR",
1429
help=u"Directory to search for configuration"
1430
u" files")
1431
parser.add_option("--no-dbus", action=u"store_false",
1432
dest=u"use_dbus", help=u"Do not provide D-Bus"
1433
u" system bus interface")
1434
parser.add_option("--no-ipv6", action=u"store_false",
1435
dest=u"use_ipv6", help=u"Do not use IPv6")
1436
options = parser.parse_args()[0]
2789
1437
2790
1438
if options.check:
2791
1439
import doctest
2792
fail_count, test_count = doctest.testmod()
2793
sys.exit(os.EX_OK if fail_count == 0 else 1)
1440
doctest.testmod()
1441
sys.exit()
2794
1442
2795
1443
# 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
}
1444
server_defaults = { u"interface": u"",
1445
u"address": u"",
1446
u"port": u"",
1447
u"debug": u"False",
1448
u"priority":
1449
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1450
u"servicename": u"Mandos",
1451
u"use_dbus": u"True",
1452
u"use_ipv6": u"True",
1453
}
2813
1454
2814
1455
# Parse config file for server-global settings
2815
1456
server_config = configparser.SafeConfigParser(server_defaults)
2816
1457
del server_defaults
2817
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1458
server_config.read(os.path.join(options.configdir,
1459
u"mandos.conf"))
2818
1460
# Convert the SafeConfigParser object to a dict
2819
1461
server_settings = server_config.defaults()
2820
1462
# 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",
1463
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1464
server_settings[option] = server_config.getboolean(u"DEFAULT",
2823
1465
option)
2824
1466
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"])
1467
server_settings["port"] = server_config.getint(u"DEFAULT",
1468
u"port")
2836
1469
del server_config
2837
1470
2838
1471
# Override the settings from the config file with command line
2839
1472
# 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"):
1473
for option in (u"interface", u"address", u"port", u"debug",
1474
u"priority", u"servicename", u"configdir",
1475
u"use_dbus", u"use_ipv6"):
2844
1476
value = getattr(options, option)
2845
1477
if value is not None:
2846
1478
server_settings[option] = value
2847
1479
del options
2848
1480
# Force all strings to be unicode
2849
1481
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
1482
if type(server_settings[option]) is str:
1483
server_settings[option] = unicode(server_settings[option])
2860
1484
# Now we have our good server settings in "server_settings"
2861
1485
2862
1486
##################################################################
2863
1487
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
1488
# 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"])))
1489
debug = server_settings[u"debug"]
1490
use_dbus = server_settings[u"use_dbus"]
1491
use_ipv6 = server_settings[u"use_ipv6"]
1492
1493
if not debug:
1494
syslogger.setLevel(logging.WARNING)
1495
console.setLevel(logging.WARNING)
1496
1497
if server_settings[u"servicename"] != u"Mandos":
1498
syslogger.setFormatter(logging.Formatter
1499
(u'Mandos (%s) [%%(process)d]:'
1500
u' %%(levelname)s: %%(message)s'
1501
% server_settings[u"servicename"]))
2893
1502
2894
1503
# 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"))
1504
client_defaults = { u"timeout": u"1h",
1505
u"interval": u"5m",
1506
u"checker": u"fping -q -- %%(host)s",
1507
u"host": u"",
1508
}
1509
client_config = configparser.SafeConfigParser(client_defaults)
1510
client_config.read(os.path.join(server_settings[u"configdir"],
1511
u"clients.conf"))
2899
1512
2900
1513
global mandos_dbus_service
2901
1514
mandos_dbus_service = None
2902
1515
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)
1516
tcp_server = MandosServer((server_settings[u"address"],
1517
server_settings[u"port"]),
1518
ClientHandler,
1519
interface=server_settings[u"interface"],
1520
use_ipv6=use_ipv6,
1521
gnutls_priority=
1522
server_settings[u"priority"],
1523
use_dbus=use_dbus)
1524
pidfilename = u"/var/run/mandos.pid"
1525
try:
1526
pidfile = open(pidfilename, u"w")
1527
except IOError:
1528
logger.error(u"Could not open file %r", pidfilename)
2924
1529
2925
for name in ("_mandos", "mandos", "nobody"):
1530
try:
1531
uid = pwd.getpwnam(u"_mandos").pw_uid
1532
gid = pwd.getpwnam(u"_mandos").pw_gid
1533
except KeyError:
2926
1534
try:
2927
uid = pwd.getpwnam(name).pw_uid
2928
gid = pwd.getpwnam(name).pw_gid
2929
break
1535
uid = pwd.getpwnam(u"mandos").pw_uid
1536
gid = pwd.getpwnam(u"mandos").pw_gid
2930
1537
except KeyError:
2931
continue
2932
else:
2933
uid = 65534
2934
gid = 65534
1538
try:
1539
uid = pwd.getpwnam(u"nobody").pw_uid
1540
gid = pwd.getpwnam(u"nobody").pw_gid
1541
except KeyError:
1542
uid = 65534
1543
gid = 65534
2935
1544
try:
2936
1545
os.setgid(gid)
2937
1546
os.setuid(uid)
2938
except OSError as error:
2939
if error.errno != errno.EPERM:
2940
raise
1547
except OSError, error:
1548
if error[0] != errno.EPERM:
1549
raise error
2941
1550
1551
# Enable all possible GnuTLS debugging
2942
1552
if debug:
2943
# Enable all possible GnuTLS debugging
2944
2945
1553
# "Use a log level over 10 to enable all debugging options."
2946
1554
# - GnuTLS manual
2947
gnutls.global_set_log_level(11)
1555
gnutls.library.functions.gnutls_global_set_log_level(11)
2948
1556
2949
@gnutls.log_func
1557
@gnutls.library.types.gnutls_log_func
2950
1558
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()
1559
logger.debug(u"GnuTLS: %s", string[:-1])
1560
1561
(gnutls.library.functions
1562
.gnutls_global_set_log_function(debug_gnutls))
2969
1563
2970
1564
global main_loop
2971
1565
# From the Avahi example code
2972
DBusGMainLoop(set_as_default=True)
1566
DBusGMainLoop(set_as_default=True )
2973
1567
main_loop = gobject.MainLoop()
2974
1568
bus = dbus.SystemBus()
2975
1569
# End of Avahi example code
2976
1570
if use_dbus:
2977
1571
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)
1572
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1573
bus, do_not_queue=True)
1574
except dbus.exceptions.NameExistsException, e:
1575
logger.error(unicode(e) + u", disabling D-Bus")
2986
1576
use_dbus = False
2987
server_settings["use_dbus"] = False
1577
server_settings[u"use_dbus"] = False
2988
1578
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()
1579
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1580
service = AvahiService(name = server_settings[u"servicename"],
1581
servicetype = u"_mandos._tcp",
1582
protocol = protocol, bus = bus)
1583
if server_settings["interface"]:
1584
service.interface = (if_nametoindex
1585
(str(server_settings[u"interface"])))
3002
1586
3003
1587
client_class = Client
3004
1588
if use_dbus:
3005
1589
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
1590
tcp_server.clients.update(set(
1591
client_class(name = section,
1592
config= dict(client_config.items(section)))
1593
for section in client_config.sections()))
3116
1594
if not tcp_server.clients:
3117
logger.warning("No clients defined")
3118
3119
if not foreground:
3120
if pidfile is not None:
1595
logger.warning(u"No clients defined")
1596
1597
if debug:
1598
# Redirect stdin so all checkers get /dev/null
1599
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1600
os.dup2(null, sys.stdin.fileno())
1601
if null > 2:
1602
os.close(null)
1603
else:
1604
# No console logging
1605
logger.removeHandler(console)
1606
# Close all input and output, do double fork, etc.
1607
daemon()
1608
1609
try:
1610
with closing(pidfile):
3121
1611
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)
1612
pidfile.write(str(pid) + "\n")
3128
1613
del pidfile
3129
del pidfilename
1614
except IOError:
1615
logger.error(u"Could not write to file %r with PID %d",
1616
pidfilename, pid)
1617
except NameError:
1618
# "pidfile" was never created
1619
pass
1620
del pidfilename
3130
1621
1622
if not debug:
1623
signal.signal(signal.SIGINT, signal.SIG_IGN)
3131
1624
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
3132
1625
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3133
1626
3134
1627
if use_dbus:
3135
3136
@alternate_dbus_interfaces(
3137
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3138
class MandosDBusService(DBusObjectWithObjectManager):
1628
class MandosDBusService(dbus.service.Object):
3139
1629
"""A D-Bus proxy object"""
3140
3141
1630
def __init__(self):
3142
dbus.service.Object.__init__(self, bus, "/")
3143
3144
_interface = "se.recompile.Mandos"
3145
3146
@dbus.service.signal(_interface, signature="o")
3147
def ClientAdded(self, objpath):
1631
dbus.service.Object.__init__(self, bus, u"/")
1632
_interface = u"se.bsnet.fukt.Mandos"
1633
1634
@dbus.service.signal(_interface, signature=u"oa{sv}")
1635
def ClientAdded(self, objpath, properties):
3148
1636
"D-Bus signal"
3149
1637
pass
3150
1638
3151
@dbus.service.signal(_interface, signature="ss")
1639
@dbus.service.signal(_interface, signature=u"ss")
3152
1640
def ClientNotFound(self, fingerprint, address):
3153
1641
"D-Bus signal"
3154
1642
pass
3155
1643
3156
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3157
"true"})
3158
@dbus.service.signal(_interface, signature="os")
1644
@dbus.service.signal(_interface, signature=u"os")
3159
1645
def ClientRemoved(self, objpath, name):
3160
1646
"D-Bus signal"
3161
1647
pass
3162
1648
3163
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3164
"true"})
3165
@dbus.service.method(_interface, out_signature="ao")
1649
@dbus.service.method(_interface, out_signature=u"ao")
3166
1650
def GetAllClients(self):
3167
1651
"D-Bus method"
3168
return dbus.Array(c.dbus_object_path for c in
3169
tcp_server.clients.itervalues())
1652
return dbus.Array(c.dbus_object_path
1653
for c in tcp_server.clients)
3170
1654
3171
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3172
"true"})
3173
1655
@dbus.service.method(_interface,
3174
out_signature="a{oa{sv}}")
1656
out_signature=u"a{oa{sv}}")
3175
1657
def GetAllClientsWithProperties(self):
3176
1658
"D-Bus method"
3177
1659
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}")
1660
((c.dbus_object_path, c.GetAll(u""))
1661
for c in tcp_server.clients),
1662
signature=u"oa{sv}")
3182
1663
3183
@dbus.service.method(_interface, in_signature="o")
1664
@dbus.service.method(_interface, in_signature=u"o")
3184
1665
def RemoveClient(self, object_path):
3185
1666
"D-Bus method"
3186
for c in tcp_server.clients.itervalues():
1667
for c in tcp_server.clients:
3187
1668
if c.dbus_object_path == object_path:
3188
del tcp_server.clients[c.name]
1669
tcp_server.clients.remove(c)
3189
1670
c.remove_from_connection()
3190
# Don't signal the disabling
1671
# Don't signal anything except ClientRemoved
3191
1672
c.disable(quiet=True)
3192
# Emit D-Bus signal for removal
3193
self.client_removed_signal(c)
1673
# Emit D-Bus signal
1674
self.ClientRemoved(object_path, c.name)
3194
1675
return
3195
1676
raise KeyError(object_path)
3196
1677
3197
1678
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
1679
3235
1680
mandos_dbus_service = MandosDBusService()
3236
1681
3237
1682
def cleanup():
3238
1683
"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
1684
service.cleanup()
1685
3300
1686
while tcp_server.clients:
3301
name, client = tcp_server.clients.popitem()
1687
client = tcp_server.clients.pop()
3302
1688
if use_dbus:
3303
1689
client.remove_from_connection()
3304
# Don't signal the disabling
1690
client.disable_hook = None
1691
# Don't signal anything except ClientRemoved
3305
1692
client.disable(quiet=True)
3306
# Emit D-Bus signal for removal
3307
1693
if use_dbus:
3308
mandos_dbus_service.client_removed_signal(client)
3309
client_settings.clear()
1694
# Emit D-Bus signal
1695
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1696
client.name)
3310
1697
3311
1698
atexit.register(cleanup)
3312
1699
3313
for client in tcp_server.clients.itervalues():
1700
for client in tcp_server.clients:
3314
1701
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()
1702
# Emit D-Bus signal
1703
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1704
client.GetAll(u""))
1705
client.enable()
3320
1706
3321
1707
tcp_server.enable()
3322
1708
tcp_server.server_activate()
3323
1709
3324
1710
# Find out what port we got
3325
if zeroconf:
3326
service.port = tcp_server.socket.getsockname()[1]
1711
service.port = tcp_server.socket.getsockname()[1]
3327
1712
if use_ipv6:
3328
logger.info("Now listening on address %r, port %d,"
3329
" flowinfo %d, scope_id %d",
3330
*tcp_server.socket.getsockname())
1713
logger.info(u"Now listening on address %r, port %d,"
1714
" flowinfo %d, scope_id %d"
1715
% tcp_server.socket.getsockname())
3331
1716
else: # IPv4
3332
logger.info("Now listening on address %r, port %d",
3333
*tcp_server.socket.getsockname())
1717
logger.info(u"Now listening on address %r, port %d"
1718
% tcp_server.socket.getsockname())
3334
1719
3335
1720
#service.interface = tcp_server.socket.getsockname()[3]
3336
1721
3337
1722
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
1723
# From the Avahi example code
1724
try:
1725
service.activate()
1726
except dbus.exceptions.DBusException, error:
1727
logger.critical(u"DBusException: %s", error)
1728
cleanup()
1729
sys.exit(1)
1730
# End of Avahi example code
3347
1731
3348
1732
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
3349
1733
lambda *args, **kwargs:
3350
1734
(tcp_server.handle_request
3351
1735
(*args[2:], **kwargs) or True))
3352
1736
3353
logger.debug("Starting main loop")
1737
logger.debug(u"Starting main loop")
3354
1738
main_loop.run()
3355
except AvahiError as error:
3356
logger.critical("Avahi Error", exc_info=error)
1739
except AvahiError, error:
1740
logger.critical(u"AvahiError: %s", error)
3357
1741
cleanup()
3358
1742
sys.exit(1)
3359
1743
except KeyboardInterrupt:
3360
1744
if debug:
3361
print("", file=sys.stderr)
3362
logger.debug("Server received KeyboardInterrupt")
3363
logger.debug("Server exiting")
1745
print >> sys.stderr
1746
logger.debug(u"Server received KeyboardInterrupt")
1747
logger.debug(u"Server exiting")
3364
1748
# Must run before the D-Bus bus name gets deregistered
3365
1749
cleanup()
3366
1750
3367
3368
1751
if __name__ == '__main__':
3369
1752
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0