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- Committer: Teddy Hogeborn
- Date: 2009-12-27 03:35:58 UTC
- Revision ID: teddy@fukt.bsnet.se-20091227033558-y57wv1u4cls3i8kq
TODO file changes.
- 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
try:
38
from future_builtins import *
39
except ImportError:
40
pass
41
42
try:
43
import SocketServer as socketserver
44
except ImportError:
45
import socketserver
34
from __future__ import division, with_statement, absolute_import
35
36
import SocketServer as socketserver
46
37
import socket
47
import argparse
38
import optparse
48
39
import datetime
49
40
import errno
50
try:
51
import ConfigParser as configparser
52
except ImportError:
53
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
54
48
import sys
55
49
import re
56
50
import os
65
59
import struct
66
60
import fcntl
67
61
import functools
68
try:
69
import cPickle as pickle
70
except ImportError:
71
import pickle
72
import multiprocessing
73
import types
74
import binascii
75
import tempfile
76
import itertools
77
import collections
78
import codecs
62
import cPickle as pickle
79
63
80
64
import dbus
81
65
import dbus.service
82
from gi.repository import GLib
66
import gobject
67
import avahi
83
68
from dbus.mainloop.glib import DBusGMainLoop
84
69
import ctypes
85
70
import ctypes.util
86
71
import xml.dom.minidom
87
72
import inspect
88
73
89
# Try to find the value of SO_BINDTODEVICE:
90
74
try:
91
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
92
# newer, and it is also the most natural place for it:
93
75
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
94
76
except AttributeError:
95
77
try:
96
# This is where SO_BINDTODEVICE was up to and including Python
97
# 2.6, and also 3.2:
98
78
from IN import SO_BINDTODEVICE
99
79
except ImportError:
100
# In Python 2.7 it seems to have been removed entirely.
101
# Try running the C preprocessor:
102
try:
103
cc = subprocess.Popen(["cc", "--language=c", "-E",
104
"/dev/stdin"],
105
stdin=subprocess.PIPE,
106
stdout=subprocess.PIPE)
107
stdout = cc.communicate(
108
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
109
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
110
except (OSError, ValueError, IndexError):
111
# No value found
112
SO_BINDTODEVICE = None
113
114
if sys.version_info.major == 2:
115
str = unicode
116
117
version = "1.7.8"
118
stored_state_file = "clients.pickle"
119
120
logger = logging.getLogger()
121
syslogger = None
122
123
try:
124
if_nametoindex = ctypes.cdll.LoadLibrary(
125
ctypes.util.find_library("c")).if_nametoindex
126
except (OSError, AttributeError):
127
128
def if_nametoindex(interface):
129
"Get an interface index the hard way, i.e. using fcntl()"
130
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
131
with contextlib.closing(socket.socket()) as s:
132
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
133
struct.pack(b"16s16x", interface))
134
interface_index = struct.unpack("I", ifreq[16:20])[0]
135
return interface_index
136
137
138
def copy_function(func):
139
"""Make a copy of a function"""
140
if sys.version_info.major == 2:
141
return types.FunctionType(func.func_code,
142
func.func_globals,
143
func.func_name,
144
func.func_defaults,
145
func.func_closure)
146
else:
147
return types.FunctionType(func.__code__,
148
func.__globals__,
149
func.__name__,
150
func.__defaults__,
151
func.__closure__)
152
153
154
def initlogger(debug, level=logging.WARNING):
155
"""init logger and add loglevel"""
156
157
global syslogger
158
syslogger = (logging.handlers.SysLogHandler(
159
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
160
address = "/dev/log"))
161
syslogger.setFormatter(logging.Formatter
162
('Mandos [%(process)d]: %(levelname)s:'
163
' %(message)s'))
164
logger.addHandler(syslogger)
165
166
if debug:
167
console = logging.StreamHandler()
168
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
169
' [%(process)d]:'
170
' %(levelname)s:'
171
' %(message)s'))
172
logger.addHandler(console)
173
logger.setLevel(level)
174
175
176
class PGPError(Exception):
177
"""Exception if encryption/decryption fails"""
178
pass
179
180
181
class PGPEngine(object):
182
"""A simple class for OpenPGP symmetric encryption & decryption"""
183
184
def __init__(self):
185
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
186
self.gpg = "gpg"
187
try:
188
output = subprocess.check_output(["gpgconf"])
189
for line in output.splitlines():
190
name, text, path = line.split(b":")
191
if name == "gpg":
192
self.gpg = path
193
break
194
except OSError as e:
195
if e.errno != errno.ENOENT:
196
raise
197
self.gnupgargs = ['--batch',
198
'--homedir', self.tempdir,
199
'--force-mdc',
200
'--quiet']
201
# Only GPG version 1 has the --no-use-agent option.
202
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
203
self.gnupgargs.append("--no-use-agent")
204
205
def __enter__(self):
206
return self
207
208
def __exit__(self, exc_type, exc_value, traceback):
209
self._cleanup()
210
return False
211
212
def __del__(self):
213
self._cleanup()
214
215
def _cleanup(self):
216
if self.tempdir is not None:
217
# Delete contents of tempdir
218
for root, dirs, files in os.walk(self.tempdir,
219
topdown = False):
220
for filename in files:
221
os.remove(os.path.join(root, filename))
222
for dirname in dirs:
223
os.rmdir(os.path.join(root, dirname))
224
# Remove tempdir
225
os.rmdir(self.tempdir)
226
self.tempdir = None
227
228
def password_encode(self, password):
229
# Passphrase can not be empty and can not contain newlines or
230
# NUL bytes. So we prefix it and hex encode it.
231
encoded = b"mandos" + binascii.hexlify(password)
232
if len(encoded) > 2048:
233
# GnuPG can't handle long passwords, so encode differently
234
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
235
.replace(b"\n", b"\\n")
236
.replace(b"\0", b"\\x00"))
237
return encoded
238
239
def encrypt(self, data, password):
240
passphrase = self.password_encode(password)
241
with tempfile.NamedTemporaryFile(
242
dir=self.tempdir) as passfile:
243
passfile.write(passphrase)
244
passfile.flush()
245
proc = subprocess.Popen([self.gpg, '--symmetric',
246
'--passphrase-file',
247
passfile.name]
248
+ self.gnupgargs,
249
stdin = subprocess.PIPE,
250
stdout = subprocess.PIPE,
251
stderr = subprocess.PIPE)
252
ciphertext, err = proc.communicate(input = data)
253
if proc.returncode != 0:
254
raise PGPError(err)
255
return ciphertext
256
257
def decrypt(self, data, password):
258
passphrase = self.password_encode(password)
259
with tempfile.NamedTemporaryFile(
260
dir = self.tempdir) as passfile:
261
passfile.write(passphrase)
262
passfile.flush()
263
proc = subprocess.Popen([self.gpg, '--decrypt',
264
'--passphrase-file',
265
passfile.name]
266
+ self.gnupgargs,
267
stdin = subprocess.PIPE,
268
stdout = subprocess.PIPE,
269
stderr = subprocess.PIPE)
270
decrypted_plaintext, err = proc.communicate(input = data)
271
if proc.returncode != 0:
272
raise PGPError(err)
273
return decrypted_plaintext
274
275
# Pretend that we have an Avahi module
276
class Avahi(object):
277
"""This isn't so much a class as it is a module-like namespace.
278
It is instantiated once, and simulates having an Avahi module."""
279
IF_UNSPEC = -1 # avahi-common/address.h
280
PROTO_UNSPEC = -1 # avahi-common/address.h
281
PROTO_INET = 0 # avahi-common/address.h
282
PROTO_INET6 = 1 # avahi-common/address.h
283
DBUS_NAME = "org.freedesktop.Avahi"
284
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
285
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
286
DBUS_PATH_SERVER = "/"
287
def string_array_to_txt_array(self, t):
288
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
289
for s in t), signature="ay")
290
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
291
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
292
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
293
SERVER_INVALID = 0 # avahi-common/defs.h
294
SERVER_REGISTERING = 1 # avahi-common/defs.h
295
SERVER_RUNNING = 2 # avahi-common/defs.h
296
SERVER_COLLISION = 3 # avahi-common/defs.h
297
SERVER_FAILURE = 4 # avahi-common/defs.h
298
avahi = Avahi()
80
SO_BINDTODEVICE = None
81
82
83
version = "1.0.14"
84
85
logger = logging.Logger(u'mandos')
86
syslogger = (logging.handlers.SysLogHandler
87
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
88
address = "/dev/log"))
89
syslogger.setFormatter(logging.Formatter
90
(u'Mandos [%(process)d]: %(levelname)s:'
91
u' %(message)s'))
92
logger.addHandler(syslogger)
93
94
console = logging.StreamHandler()
95
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
96
u' %(levelname)s:'
97
u' %(message)s'))
98
logger.addHandler(console)
299
99
300
100
class AvahiError(Exception):
301
101
def __init__(self, value, *args, **kwargs):
302
102
self.value = value
303
return super(AvahiError, self).__init__(value, *args,
304
**kwargs)
305
103
super(AvahiError, self).__init__(value, *args, **kwargs)
104
def __unicode__(self):
105
return unicode(repr(self.value))
306
106
307
107
class AvahiServiceError(AvahiError):
308
108
pass
309
109
310
311
110
class AvahiGroupError(AvahiError):
312
111
pass
313
112
318
117
Attributes:
319
118
interface: integer; avahi.IF_UNSPEC or an interface index.
320
119
Used to optionally bind to the specified interface.
321
name: string; Example: 'Mandos'
322
type: string; Example: '_mandos._tcp'.
323
See <https://www.iana.org/assignments/service-names-port-numbers>
120
name: string; Example: u'Mandos'
121
type: string; Example: u'_mandos._tcp'.
122
See <http://www.dns-sd.org/ServiceTypes.html>
324
123
port: integer; what port to announce
325
124
TXT: list of strings; TXT record for the service
326
125
domain: string; Domain to publish on, default to .local if empty.
332
131
server: D-Bus Server
333
132
bus: dbus.SystemBus()
334
133
"""
335
336
def __init__(self,
337
interface = avahi.IF_UNSPEC,
338
name = None,
339
servicetype = None,
340
port = None,
341
TXT = None,
342
domain = "",
343
host = "",
344
max_renames = 32768,
345
protocol = avahi.PROTO_UNSPEC,
346
bus = None):
134
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
135
servicetype = None, port = None, TXT = None,
136
domain = u"", host = u"", max_renames = 32768,
137
protocol = avahi.PROTO_UNSPEC, bus = None):
347
138
self.interface = interface
348
139
self.name = name
349
140
self.type = servicetype
357
148
self.group = None # our entry group
358
149
self.server = None
359
150
self.bus = bus
360
self.entry_group_state_changed_match = None
361
362
def rename(self, remove=True):
151
def rename(self):
363
152
"""Derived from the Avahi example code"""
364
153
if self.rename_count >= self.max_renames:
365
logger.critical("No suitable Zeroconf service name found"
366
" after %i retries, exiting.",
154
logger.critical(u"No suitable Zeroconf service name found"
155
u" after %i retries, exiting.",
367
156
self.rename_count)
368
raise AvahiServiceError("Too many renames")
369
self.name = str(
370
self.server.GetAlternativeServiceName(self.name))
157
raise AvahiServiceError(u"Too many renames")
158
self.name = self.server.GetAlternativeServiceName(self.name)
159
logger.info(u"Changing Zeroconf service name to %r ...",
160
unicode(self.name))
161
syslogger.setFormatter(logging.Formatter
162
(u'Mandos (%s) [%%(process)d]:'
163
u' %%(levelname)s: %%(message)s'
164
% self.name))
165
self.remove()
166
self.add()
371
167
self.rename_count += 1
372
logger.info("Changing Zeroconf service name to %r ...",
373
self.name)
374
if remove:
375
self.remove()
376
try:
377
self.add()
378
except dbus.exceptions.DBusException as error:
379
if (error.get_dbus_name()
380
== "org.freedesktop.Avahi.CollisionError"):
381
logger.info("Local Zeroconf service name collision.")
382
return self.rename(remove=False)
383
else:
384
logger.critical("D-Bus Exception", exc_info=error)
385
self.cleanup()
386
os._exit(1)
387
388
168
def remove(self):
389
169
"""Derived from the Avahi example code"""
390
if self.entry_group_state_changed_match is not None:
391
self.entry_group_state_changed_match.remove()
392
self.entry_group_state_changed_match = None
393
170
if self.group is not None:
394
171
self.group.Reset()
395
396
172
def add(self):
397
173
"""Derived from the Avahi example code"""
398
self.remove()
399
174
if self.group is None:
400
175
self.group = dbus.Interface(
401
176
self.bus.get_object(avahi.DBUS_NAME,
402
177
self.server.EntryGroupNew()),
403
178
avahi.DBUS_INTERFACE_ENTRY_GROUP)
404
self.entry_group_state_changed_match = (
405
self.group.connect_to_signal(
406
'StateChanged', self.entry_group_state_changed))
407
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
179
self.group.connect_to_signal('StateChanged',
180
self
181
.entry_group_state_changed)
182
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
408
183
self.name, self.type)
409
184
self.group.AddService(
410
185
self.interface,
415
190
dbus.UInt16(self.port),
416
191
avahi.string_array_to_txt_array(self.TXT))
417
192
self.group.Commit()
418
419
193
def entry_group_state_changed(self, state, error):
420
194
"""Derived from the Avahi example code"""
421
logger.debug("Avahi entry group state change: %i", state)
195
logger.debug(u"Avahi state change: %i", state)
422
196
423
197
if state == avahi.ENTRY_GROUP_ESTABLISHED:
424
logger.debug("Zeroconf service established.")
198
logger.debug(u"Zeroconf service established.")
425
199
elif state == avahi.ENTRY_GROUP_COLLISION:
426
logger.info("Zeroconf service name collision.")
200
logger.warning(u"Zeroconf service name collision.")
427
201
self.rename()
428
202
elif state == avahi.ENTRY_GROUP_FAILURE:
429
logger.critical("Avahi: Error in group state changed %s",
430
str(error))
431
raise AvahiGroupError("State changed: {!s}".format(error))
432
203
logger.critical(u"Avahi: Error in group state changed %s",
204
unicode(error))
205
raise AvahiGroupError(u"State changed: %s"
206
% unicode(error))
433
207
def cleanup(self):
434
208
"""Derived from the Avahi example code"""
435
209
if self.group is not None:
436
try:
437
self.group.Free()
438
except (dbus.exceptions.UnknownMethodException,
439
dbus.exceptions.DBusException):
440
pass
210
self.group.Free()
441
211
self.group = None
442
self.remove()
443
444
def server_state_changed(self, state, error=None):
212
def server_state_changed(self, state):
445
213
"""Derived from the Avahi example code"""
446
logger.debug("Avahi server state change: %i", state)
447
bad_states = {
448
avahi.SERVER_INVALID: "Zeroconf server invalid",
449
avahi.SERVER_REGISTERING: None,
450
avahi.SERVER_COLLISION: "Zeroconf server name collision",
451
avahi.SERVER_FAILURE: "Zeroconf server failure",
452
}
453
if state in bad_states:
454
if bad_states[state] is not None:
455
if error is None:
456
logger.error(bad_states[state])
457
else:
458
logger.error(bad_states[state] + ": %r", error)
459
self.cleanup()
214
if state == avahi.SERVER_COLLISION:
215
logger.error(u"Zeroconf server name collision")
216
self.remove()
460
217
elif state == avahi.SERVER_RUNNING:
461
try:
462
self.add()
463
except dbus.exceptions.DBusException as error:
464
if (error.get_dbus_name()
465
== "org.freedesktop.Avahi.CollisionError"):
466
logger.info("Local Zeroconf service name"
467
" collision.")
468
return self.rename(remove=False)
469
else:
470
logger.critical("D-Bus Exception", exc_info=error)
471
self.cleanup()
472
os._exit(1)
473
else:
474
if error is None:
475
logger.debug("Unknown state: %r", state)
476
else:
477
logger.debug("Unknown state: %r: %r", state, error)
478
218
self.add()
479
219
def activate(self):
480
220
"""Derived from the Avahi example code"""
481
221
if self.server is None:
482
222
self.server = dbus.Interface(
483
223
self.bus.get_object(avahi.DBUS_NAME,
484
avahi.DBUS_PATH_SERVER,
485
follow_name_owner_changes=True),
224
avahi.DBUS_PATH_SERVER),
486
225
avahi.DBUS_INTERFACE_SERVER)
487
self.server.connect_to_signal("StateChanged",
488
self.server_state_changed)
226
self.server.connect_to_signal(u"StateChanged",
227
self.server_state_changed)
489
228
self.server_state_changed(self.server.GetState())
490
229
491
230
492
class AvahiServiceToSyslog(AvahiService):
493
def rename(self, *args, **kwargs):
494
"""Add the new name to the syslog messages"""
495
ret = AvahiService.rename(self, *args, **kwargs)
496
syslogger.setFormatter(logging.Formatter(
497
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
498
.format(self.name)))
499
return ret
500
501
# Pretend that we have a GnuTLS module
502
class GnuTLS(object):
503
"""This isn't so much a class as it is a module-like namespace.
504
It is instantiated once, and simulates having a GnuTLS module."""
505
506
_library = ctypes.cdll.LoadLibrary(
507
ctypes.util.find_library("gnutls"))
508
_need_version = b"3.3.0"
509
def __init__(self):
510
# Need to use class name "GnuTLS" here, since this method is
511
# called before the assignment to the "gnutls" global variable
512
# happens.
513
if GnuTLS.check_version(self._need_version) is None:
514
raise GnuTLS.Error("Needs GnuTLS {} or later"
515
.format(self._need_version))
516
517
# Unless otherwise indicated, the constants and types below are
518
# all from the gnutls/gnutls.h C header file.
519
520
# Constants
521
E_SUCCESS = 0
522
E_INTERRUPTED = -52
523
E_AGAIN = -28
524
CRT_OPENPGP = 2
525
CLIENT = 2
526
SHUT_RDWR = 0
527
CRD_CERTIFICATE = 1
528
E_NO_CERTIFICATE_FOUND = -49
529
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
530
531
# Types
532
class session_int(ctypes.Structure):
533
_fields_ = []
534
session_t = ctypes.POINTER(session_int)
535
class certificate_credentials_st(ctypes.Structure):
536
_fields_ = []
537
certificate_credentials_t = ctypes.POINTER(
538
certificate_credentials_st)
539
certificate_type_t = ctypes.c_int
540
class datum_t(ctypes.Structure):
541
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
542
('size', ctypes.c_uint)]
543
class openpgp_crt_int(ctypes.Structure):
544
_fields_ = []
545
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
546
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
547
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
548
credentials_type_t = ctypes.c_int
549
transport_ptr_t = ctypes.c_void_p
550
close_request_t = ctypes.c_int
551
552
# Exceptions
553
class Error(Exception):
554
# We need to use the class name "GnuTLS" here, since this
555
# exception might be raised from within GnuTLS.__init__,
556
# which is called before the assignment to the "gnutls"
557
# global variable has happened.
558
def __init__(self, message = None, code = None, args=()):
559
# Default usage is by a message string, but if a return
560
# code is passed, convert it to a string with
561
# gnutls.strerror()
562
self.code = code
563
if message is None and code is not None:
564
message = GnuTLS.strerror(code)
565
return super(GnuTLS.Error, self).__init__(
566
message, *args)
567
568
class CertificateSecurityError(Error):
569
pass
570
571
# Classes
572
class Credentials(object):
573
def __init__(self):
574
self._c_object = gnutls.certificate_credentials_t()
575
gnutls.certificate_allocate_credentials(
576
ctypes.byref(self._c_object))
577
self.type = gnutls.CRD_CERTIFICATE
578
579
def __del__(self):
580
gnutls.certificate_free_credentials(self._c_object)
581
582
class ClientSession(object):
583
def __init__(self, socket, credentials = None):
584
self._c_object = gnutls.session_t()
585
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
586
gnutls.set_default_priority(self._c_object)
587
gnutls.transport_set_ptr(self._c_object, socket.fileno())
588
gnutls.handshake_set_private_extensions(self._c_object,
589
True)
590
self.socket = socket
591
if credentials is None:
592
credentials = gnutls.Credentials()
593
gnutls.credentials_set(self._c_object, credentials.type,
594
ctypes.cast(credentials._c_object,
595
ctypes.c_void_p))
596
self.credentials = credentials
597
598
def __del__(self):
599
gnutls.deinit(self._c_object)
600
601
def handshake(self):
602
return gnutls.handshake(self._c_object)
603
604
def send(self, data):
605
data = bytes(data)
606
data_len = len(data)
607
while data_len > 0:
608
data_len -= gnutls.record_send(self._c_object,
609
data[-data_len:],
610
data_len)
611
612
def bye(self):
613
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
614
615
# Error handling functions
616
def _error_code(result):
617
"""A function to raise exceptions on errors, suitable
618
for the 'restype' attribute on ctypes functions"""
619
if result >= 0:
620
return result
621
if result == gnutls.E_NO_CERTIFICATE_FOUND:
622
raise gnutls.CertificateSecurityError(code = result)
623
raise gnutls.Error(code = result)
624
625
def _retry_on_error(result, func, arguments):
626
"""A function to retry on some errors, suitable
627
for the 'errcheck' attribute on ctypes functions"""
628
while result < 0:
629
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
630
return _error_code(result)
631
result = func(*arguments)
632
return result
633
634
# Unless otherwise indicated, the function declarations below are
635
# all from the gnutls/gnutls.h C header file.
636
637
# Functions
638
priority_set_direct = _library.gnutls_priority_set_direct
639
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
640
ctypes.POINTER(ctypes.c_char_p)]
641
priority_set_direct.restype = _error_code
642
643
init = _library.gnutls_init
644
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
645
init.restype = _error_code
646
647
set_default_priority = _library.gnutls_set_default_priority
648
set_default_priority.argtypes = [session_t]
649
set_default_priority.restype = _error_code
650
651
record_send = _library.gnutls_record_send
652
record_send.argtypes = [session_t, ctypes.c_void_p,
653
ctypes.c_size_t]
654
record_send.restype = ctypes.c_ssize_t
655
record_send.errcheck = _retry_on_error
656
657
certificate_allocate_credentials = (
658
_library.gnutls_certificate_allocate_credentials)
659
certificate_allocate_credentials.argtypes = [
660
ctypes.POINTER(certificate_credentials_t)]
661
certificate_allocate_credentials.restype = _error_code
662
663
certificate_free_credentials = (
664
_library.gnutls_certificate_free_credentials)
665
certificate_free_credentials.argtypes = [certificate_credentials_t]
666
certificate_free_credentials.restype = None
667
668
handshake_set_private_extensions = (
669
_library.gnutls_handshake_set_private_extensions)
670
handshake_set_private_extensions.argtypes = [session_t,
671
ctypes.c_int]
672
handshake_set_private_extensions.restype = None
673
674
credentials_set = _library.gnutls_credentials_set
675
credentials_set.argtypes = [session_t, credentials_type_t,
676
ctypes.c_void_p]
677
credentials_set.restype = _error_code
678
679
strerror = _library.gnutls_strerror
680
strerror.argtypes = [ctypes.c_int]
681
strerror.restype = ctypes.c_char_p
682
683
certificate_type_get = _library.gnutls_certificate_type_get
684
certificate_type_get.argtypes = [session_t]
685
certificate_type_get.restype = _error_code
686
687
certificate_get_peers = _library.gnutls_certificate_get_peers
688
certificate_get_peers.argtypes = [session_t,
689
ctypes.POINTER(ctypes.c_uint)]
690
certificate_get_peers.restype = ctypes.POINTER(datum_t)
691
692
global_set_log_level = _library.gnutls_global_set_log_level
693
global_set_log_level.argtypes = [ctypes.c_int]
694
global_set_log_level.restype = None
695
696
global_set_log_function = _library.gnutls_global_set_log_function
697
global_set_log_function.argtypes = [log_func]
698
global_set_log_function.restype = None
699
700
deinit = _library.gnutls_deinit
701
deinit.argtypes = [session_t]
702
deinit.restype = None
703
704
handshake = _library.gnutls_handshake
705
handshake.argtypes = [session_t]
706
handshake.restype = _error_code
707
handshake.errcheck = _retry_on_error
708
709
transport_set_ptr = _library.gnutls_transport_set_ptr
710
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
711
transport_set_ptr.restype = None
712
713
bye = _library.gnutls_bye
714
bye.argtypes = [session_t, close_request_t]
715
bye.restype = _error_code
716
bye.errcheck = _retry_on_error
717
718
check_version = _library.gnutls_check_version
719
check_version.argtypes = [ctypes.c_char_p]
720
check_version.restype = ctypes.c_char_p
721
722
# All the function declarations below are from gnutls/openpgp.h
723
724
openpgp_crt_init = _library.gnutls_openpgp_crt_init
725
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
726
openpgp_crt_init.restype = _error_code
727
728
openpgp_crt_import = _library.gnutls_openpgp_crt_import
729
openpgp_crt_import.argtypes = [openpgp_crt_t,
730
ctypes.POINTER(datum_t),
731
openpgp_crt_fmt_t]
732
openpgp_crt_import.restype = _error_code
733
734
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
735
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
736
ctypes.POINTER(ctypes.c_uint)]
737
openpgp_crt_verify_self.restype = _error_code
738
739
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
740
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
741
openpgp_crt_deinit.restype = None
742
743
openpgp_crt_get_fingerprint = (
744
_library.gnutls_openpgp_crt_get_fingerprint)
745
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
746
ctypes.c_void_p,
747
ctypes.POINTER(
748
ctypes.c_size_t)]
749
openpgp_crt_get_fingerprint.restype = _error_code
750
751
# Remove non-public functions
752
del _error_code, _retry_on_error
753
# Create the global "gnutls" object, simulating a module
754
gnutls = GnuTLS()
755
756
def call_pipe(connection, # : multiprocessing.Connection
757
func, *args, **kwargs):
758
"""This function is meant to be called by multiprocessing.Process
759
760
This function runs func(*args, **kwargs), and writes the resulting
761
return value on the provided multiprocessing.Connection.
762
"""
763
connection.send(func(*args, **kwargs))
764
connection.close()
765
766
231
class Client(object):
767
232
"""A representation of a client host served by this server.
768
233
769
234
Attributes:
770
approved: bool(); 'None' if not yet approved/disapproved
771
approval_delay: datetime.timedelta(); Time to wait for approval
772
approval_duration: datetime.timedelta(); Duration of one approval
235
name: string; from the config file, used in log messages and
236
D-Bus identifiers
237
fingerprint: string (40 or 32 hexadecimal digits); used to
238
uniquely identify the client
239
secret: bytestring; sent verbatim (over TLS) to client
240
host: string; available for use by the checker command
241
created: datetime.datetime(); (UTC) object creation
242
last_enabled: datetime.datetime(); (UTC)
243
enabled: bool()
244
last_checked_ok: datetime.datetime(); (UTC) or None
245
timeout: datetime.timedelta(); How long from last_checked_ok
246
until this client is disabled
247
interval: datetime.timedelta(); How often to start a new checker
248
disable_hook: If set, called by disable() as disable_hook(self)
773
249
checker: subprocess.Popen(); a running checker process used
774
250
to see if the client lives.
775
251
'None' if no process is running.
776
checker_callback_tag: a GLib event source tag, or None
777
checker_command: string; External command which is run to check
778
if client lives. %() expansions are done at
252
checker_initiator_tag: a gobject event source tag, or None
253
disable_initiator_tag: - '' -
254
checker_callback_tag: - '' -
255
checker_command: string; External command which is run to check if
256
client lives. %() expansions are done at
779
257
runtime with vars(self) as dict, so that for
780
258
instance %(name)s can be used in the command.
781
checker_initiator_tag: a GLib event source tag, or None
782
created: datetime.datetime(); (UTC) object creation
783
client_structure: Object describing what attributes a client has
784
and is used for storing the client at exit
785
259
current_checker_command: string; current running checker_command
786
disable_initiator_tag: a GLib event source tag, or None
787
enabled: bool()
788
fingerprint: string (40 or 32 hexadecimal digits); used to
789
uniquely identify the client
790
host: string; available for use by the checker command
791
interval: datetime.timedelta(); How often to start a new checker
792
last_approval_request: datetime.datetime(); (UTC) or None
793
last_checked_ok: datetime.datetime(); (UTC) or None
794
last_checker_status: integer between 0 and 255 reflecting exit
795
status of last checker. -1 reflects crashed
796
checker, -2 means no checker completed yet.
797
last_checker_signal: The signal which killed the last checker, if
798
last_checker_status is -1
799
last_enabled: datetime.datetime(); (UTC) or None
800
name: string; from the config file, used in log messages and
801
D-Bus identifiers
802
secret: bytestring; sent verbatim (over TLS) to client
803
timeout: datetime.timedelta(); How long from last_checked_ok
804
until this client is disabled
805
extended_timeout: extra long timeout when secret has been sent
806
runtime_expansions: Allowed attributes for runtime expansion.
807
expires: datetime.datetime(); time (UTC) when a client will be
808
disabled, or None
809
server_settings: The server_settings dict from main()
810
260
"""
811
261
812
runtime_expansions = ("approval_delay", "approval_duration",
813
"created", "enabled", "expires",
814
"fingerprint", "host", "interval",
815
"last_approval_request", "last_checked_ok",
816
"last_enabled", "name", "timeout")
817
client_defaults = {
818
"timeout": "PT5M",
819
"extended_timeout": "PT15M",
820
"interval": "PT2M",
821
"checker": "fping -q -- %%(host)s",
822
"host": "",
823
"approval_delay": "PT0S",
824
"approval_duration": "PT1S",
825
"approved_by_default": "True",
826
"enabled": "True",
827
}
828
829
262
@staticmethod
830
def config_parser(config):
831
"""Construct a new dict of client settings of this form:
832
{ client_name: {setting_name: value, ...}, ...}
833
with exceptions for any special settings as defined above.
834
NOTE: Must be a pure function. Must return the same result
835
value given the same arguments.
836
"""
837
settings = {}
838
for client_name in config.sections():
839
section = dict(config.items(client_name))
840
client = settings[client_name] = {}
841
842
client["host"] = section["host"]
843
# Reformat values from string types to Python types
844
client["approved_by_default"] = config.getboolean(
845
client_name, "approved_by_default")
846
client["enabled"] = config.getboolean(client_name,
847
"enabled")
848
849
# Uppercase and remove spaces from fingerprint for later
850
# comparison purposes with return value from the
851
# fingerprint() function
852
client["fingerprint"] = (section["fingerprint"].upper()
853
.replace(" ", ""))
854
if "secret" in section:
855
client["secret"] = codecs.decode(section["secret"]
856
.encode("utf-8"),
857
"base64")
858
elif "secfile" in section:
859
with open(os.path.expanduser(os.path.expandvars
860
(section["secfile"])),
861
"rb") as secfile:
862
client["secret"] = secfile.read()
863
else:
864
raise TypeError("No secret or secfile for section {}"
865
.format(section))
866
client["timeout"] = string_to_delta(section["timeout"])
867
client["extended_timeout"] = string_to_delta(
868
section["extended_timeout"])
869
client["interval"] = string_to_delta(section["interval"])
870
client["approval_delay"] = string_to_delta(
871
section["approval_delay"])
872
client["approval_duration"] = string_to_delta(
873
section["approval_duration"])
874
client["checker_command"] = section["checker"]
875
client["last_approval_request"] = None
876
client["last_checked_ok"] = None
877
client["last_checker_status"] = -2
878
879
return settings
880
881
def __init__(self, settings, name = None, server_settings=None):
263
def _timedelta_to_milliseconds(td):
264
"Convert a datetime.timedelta() to milliseconds"
265
return ((td.days * 24 * 60 * 60 * 1000)
266
+ (td.seconds * 1000)
267
+ (td.microseconds // 1000))
268
269
def timeout_milliseconds(self):
270
"Return the 'timeout' attribute in milliseconds"
271
return self._timedelta_to_milliseconds(self.timeout)
272
273
def interval_milliseconds(self):
274
"Return the 'interval' attribute in milliseconds"
275
return self._timedelta_to_milliseconds(self.interval)
276
277
def __init__(self, name = None, disable_hook=None, config=None):
278
"""Note: the 'checker' key in 'config' sets the
279
'checker_command' attribute and *not* the 'checker'
280
attribute."""
882
281
self.name = name
883
if server_settings is None:
884
server_settings = {}
885
self.server_settings = server_settings
886
# adding all client settings
887
for setting, value in settings.items():
888
setattr(self, setting, value)
889
890
if self.enabled:
891
if not hasattr(self, "last_enabled"):
892
self.last_enabled = datetime.datetime.utcnow()
893
if not hasattr(self, "expires"):
894
self.expires = (datetime.datetime.utcnow()
895
+ self.timeout)
282
if config is None:
283
config = {}
284
logger.debug(u"Creating client %r", self.name)
285
# Uppercase and remove spaces from fingerprint for later
286
# comparison purposes with return value from the fingerprint()
287
# function
288
self.fingerprint = (config[u"fingerprint"].upper()
289
.replace(u" ", u""))
290
logger.debug(u" Fingerprint: %s", self.fingerprint)
291
if u"secret" in config:
292
self.secret = config[u"secret"].decode(u"base64")
293
elif u"secfile" in config:
294
with open(os.path.expanduser(os.path.expandvars
295
(config[u"secfile"])),
296
"rb") as secfile:
297
self.secret = secfile.read()
896
298
else:
897
self.last_enabled = None
898
self.expires = None
899
900
logger.debug("Creating client %r", self.name)
901
logger.debug(" Fingerprint: %s", self.fingerprint)
902
self.created = settings.get("created",
903
datetime.datetime.utcnow())
904
905
# 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
906
309
self.checker = None
907
310
self.checker_initiator_tag = None
908
311
self.disable_initiator_tag = None
909
312
self.checker_callback_tag = None
313
self.checker_command = config[u"checker"]
910
314
self.current_checker_command = None
911
self.approved = None
912
self.approvals_pending = 0
913
self.changedstate = multiprocessing_manager.Condition(
914
multiprocessing_manager.Lock())
915
self.client_structure = [attr
916
for attr in self.__dict__.keys()
917
if not attr.startswith("_")]
918
self.client_structure.append("client_structure")
919
920
for name, t in inspect.getmembers(
921
type(self), lambda obj: isinstance(obj, property)):
922
if not name.startswith("_"):
923
self.client_structure.append(name)
924
925
# Send notice to process children that client state has changed
926
def send_changedstate(self):
927
with self.changedstate:
928
self.changedstate.notify_all()
315
self.last_connect = None
929
316
930
317
def enable(self):
931
318
"""Start this client's checker and timeout hooks"""
932
if getattr(self, "enabled", False):
319
if getattr(self, u"enabled", False):
933
320
# Already enabled
934
321
return
935
self.expires = datetime.datetime.utcnow() + self.timeout
936
self.enabled = True
937
322
self.last_enabled = datetime.datetime.utcnow()
938
self.init_checker()
939
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()
940
335
941
336
def disable(self, quiet=True):
942
337
"""Disable this client."""
943
338
if not getattr(self, "enabled", False):
944
339
return False
945
340
if not quiet:
946
logger.info("Disabling client %s", self.name)
947
if getattr(self, "disable_initiator_tag", None) is not None:
948
GLib.source_remove(self.disable_initiator_tag)
341
logger.info(u"Disabling client %s", self.name)
342
if getattr(self, u"disable_initiator_tag", False):
343
gobject.source_remove(self.disable_initiator_tag)
949
344
self.disable_initiator_tag = None
950
self.expires = None
951
if getattr(self, "checker_initiator_tag", None) is not None:
952
GLib.source_remove(self.checker_initiator_tag)
345
if getattr(self, u"checker_initiator_tag", False):
346
gobject.source_remove(self.checker_initiator_tag)
953
347
self.checker_initiator_tag = None
954
348
self.stop_checker()
349
if self.disable_hook:
350
self.disable_hook(self)
955
351
self.enabled = False
956
if not quiet:
957
self.send_changedstate()
958
# Do not run this again if called by a GLib.timeout_add
352
# Do not run this again if called by a gobject.timeout_add
959
353
return False
960
354
961
355
def __del__(self):
356
self.disable_hook = None
962
357
self.disable()
963
358
964
def init_checker(self):
965
# Schedule a new checker to be started an 'interval' from now,
966
# and every interval from then on.
967
if self.checker_initiator_tag is not None:
968
GLib.source_remove(self.checker_initiator_tag)
969
self.checker_initiator_tag = GLib.timeout_add(
970
int(self.interval.total_seconds() * 1000),
971
self.start_checker)
972
# Schedule a disable() when 'timeout' has passed
973
if self.disable_initiator_tag is not None:
974
GLib.source_remove(self.disable_initiator_tag)
975
self.disable_initiator_tag = GLib.timeout_add(
976
int(self.timeout.total_seconds() * 1000), self.disable)
977
# Also start a new checker *right now*.
978
self.start_checker()
979
980
def checker_callback(self, source, condition, connection,
981
command):
359
def checker_callback(self, pid, condition, command):
982
360
"""The checker has completed, so take appropriate actions."""
983
361
self.checker_callback_tag = None
984
362
self.checker = None
985
# Read return code from connection (see call_pipe)
986
returncode = connection.recv()
987
connection.close()
988
989
if returncode >= 0:
990
self.last_checker_status = returncode
991
self.last_checker_signal = None
992
if self.last_checker_status == 0:
993
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",
994
367
vars(self))
995
368
self.checked_ok()
996
369
else:
997
logger.info("Checker for %(name)s failed", vars(self))
370
logger.info(u"Checker for %(name)s failed",
371
vars(self))
998
372
else:
999
self.last_checker_status = -1
1000
self.last_checker_signal = -returncode
1001
logger.warning("Checker for %(name)s crashed?",
373
logger.warning(u"Checker for %(name)s crashed?",
1002
374
vars(self))
1003
return False
1004
375
1005
376
def checked_ok(self):
1006
"""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
"""
1007
382
self.last_checked_ok = datetime.datetime.utcnow()
1008
self.last_checker_status = 0
1009
self.last_checker_signal = None
1010
self.bump_timeout()
1011
1012
def bump_timeout(self, timeout=None):
1013
"""Bump up the timeout for this client."""
1014
if timeout is None:
1015
timeout = self.timeout
1016
if self.disable_initiator_tag is not None:
1017
GLib.source_remove(self.disable_initiator_tag)
1018
self.disable_initiator_tag = None
1019
if getattr(self, "enabled", False):
1020
self.disable_initiator_tag = GLib.timeout_add(
1021
int(timeout.total_seconds() * 1000), self.disable)
1022
self.expires = datetime.datetime.utcnow() + timeout
1023
1024
def need_approval(self):
1025
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))
1026
387
1027
388
def start_checker(self):
1028
389
"""Start a new checker subprocess if one is not running.
1030
391
If a checker already exists, leave it running and do
1031
392
nothing."""
1032
393
# The reason for not killing a running checker is that if we
1033
# did that, and if a checker (for some reason) started running
1034
# slowly and taking more than 'interval' time, then the client
1035
# would inevitably timeout, since no checker would get a
1036
# 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
1037
398
# checkers alone, the checker would have to take more time
1038
399
# than 'timeout' for the client to be disabled, which is as it
1039
400
# should be.
1040
401
1041
if self.checker is not None and not self.checker.is_alive():
1042
logger.warning("Checker was not alive; joining")
1043
self.checker.join()
1044
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)
1045
415
# Start a new checker if needed
1046
416
if self.checker is None:
1047
# Escape attributes for the shell
1048
escaped_attrs = {
1049
attr: re.escape(str(getattr(self, attr)))
1050
for attr in self.runtime_expansions }
1051
417
try:
1052
command = self.checker_command % escaped_attrs
1053
except TypeError as error:
1054
logger.error('Could not format string "%s"',
1055
self.checker_command,
1056
exc_info=error)
1057
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
1058
434
self.current_checker_command = command
1059
logger.info("Starting checker %r for %s", command,
1060
self.name)
1061
# We don't need to redirect stdout and stderr, since
1062
# in normal mode, that is already done by daemon(),
1063
# and in debug mode we don't want to. (Stdin is
1064
# always replaced by /dev/null.)
1065
# The exception is when not debugging but nevertheless
1066
# running in the foreground; use the previously
1067
# created wnull.
1068
popen_args = { "close_fds": True,
1069
"shell": True,
1070
"cwd": "/" }
1071
if (not self.server_settings["debug"]
1072
and self.server_settings["foreground"]):
1073
popen_args.update({"stdout": wnull,
1074
"stderr": wnull })
1075
pipe = multiprocessing.Pipe(duplex = False)
1076
self.checker = multiprocessing.Process(
1077
target = call_pipe,
1078
args = (pipe[1], subprocess.call, command),
1079
kwargs = popen_args)
1080
self.checker.start()
1081
self.checker_callback_tag = GLib.io_add_watch(
1082
pipe[0].fileno(), GLib.IO_IN,
1083
self.checker_callback, pipe[0], command)
1084
# Re-run this periodically if run by GLib.timeout_add
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)
458
# Re-run this periodically if run by gobject.timeout_add
1085
459
return True
1086
460
1087
461
def stop_checker(self):
1088
462
"""Force the checker process, if any, to stop."""
1089
463
if self.checker_callback_tag:
1090
GLib.source_remove(self.checker_callback_tag)
464
gobject.source_remove(self.checker_callback_tag)
1091
465
self.checker_callback_tag = None
1092
if getattr(self, "checker", None) is None:
466
if getattr(self, u"checker", None) is None:
1093
467
return
1094
logger.debug("Stopping checker for %(name)s", vars(self))
1095
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
1096
477
self.checker = None
1097
478
1098
479
1099
def dbus_service_property(dbus_interface,
1100
signature="v",
1101
access="readwrite",
1102
byte_arrays=False):
480
def dbus_service_property(dbus_interface, signature=u"v",
481
access=u"readwrite", byte_arrays=False):
1103
482
"""Decorators for marking methods of a DBusObjectWithProperties to
1104
483
become properties on the D-Bus.
1105
484
1112
491
"""
1113
492
# Encoding deeply encoded byte arrays is not supported yet by the
1114
493
# "Set" method, so we fail early here:
1115
if byte_arrays and signature != "ay":
1116
raise ValueError("Byte arrays not supported for non-'ay'"
1117
" signature {!r}".format(signature))
1118
494
if byte_arrays and signature != u"ay":
495
raise ValueError(u"Byte arrays not supported for non-'ay'"
496
u" signature %r" % signature)
1119
497
def decorator(func):
1120
498
func._dbus_is_property = True
1121
499
func._dbus_interface = dbus_interface
1122
500
func._dbus_signature = signature
1123
501
func._dbus_access = access
1124
502
func._dbus_name = func.__name__
1125
if func._dbus_name.endswith("_dbus_property"):
503
if func._dbus_name.endswith(u"_dbus_property"):
1126
504
func._dbus_name = func._dbus_name[:-14]
1127
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
1128
return func
1129
1130
return decorator
1131
1132
1133
def dbus_interface_annotations(dbus_interface):
1134
"""Decorator for marking functions returning interface annotations
1135
1136
Usage:
1137
1138
@dbus_interface_annotations("org.example.Interface")
1139
def _foo(self): # Function name does not matter
1140
return {"org.freedesktop.DBus.Deprecated": "true",
1141
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1142
"false"}
1143
"""
1144
1145
def decorator(func):
1146
func._dbus_is_interface = True
1147
func._dbus_interface = dbus_interface
1148
func._dbus_name = dbus_interface
1149
return func
1150
1151
return decorator
1152
1153
1154
def dbus_annotations(annotations):
1155
"""Decorator to annotate D-Bus methods, signals or properties
1156
Usage:
1157
1158
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1159
"org.freedesktop.DBus.Property."
1160
"EmitsChangedSignal": "false"})
1161
@dbus_service_property("org.example.Interface", signature="b",
1162
access="r")
1163
def Property_dbus_property(self):
1164
return dbus.Boolean(False)
1165
1166
See also the DBusObjectWithAnnotations class.
1167
"""
1168
1169
def decorator(func):
1170
func._dbus_annotations = annotations
1171
return func
1172
505
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
506
return func
1173
507
return decorator
1174
508
1175
509
1176
510
class DBusPropertyException(dbus.exceptions.DBusException):
1177
511
"""A base class for D-Bus property-related exceptions
1178
512
"""
1179
pass
513
def __unicode__(self):
514
return unicode(str(self))
1180
515
1181
516
1182
517
class DBusPropertyAccessException(DBusPropertyException):
1191
526
pass
1192
527
1193
528
1194
class DBusObjectWithAnnotations(dbus.service.Object):
1195
"""A D-Bus object with annotations.
1196
1197
Classes inheriting from this can use the dbus_annotations
1198
decorator to add annotations to methods or signals.
1199
"""
1200
1201
@staticmethod
1202
def _is_dbus_thing(thing):
1203
"""Returns a function testing if an attribute is a D-Bus thing
1204
1205
If called like _is_dbus_thing("method") it returns a function
1206
suitable for use as predicate to inspect.getmembers().
1207
"""
1208
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1209
False)
1210
1211
def _get_all_dbus_things(self, thing):
1212
"""Returns a generator of (name, attribute) pairs
1213
"""
1214
return ((getattr(athing.__get__(self), "_dbus_name", name),
1215
athing.__get__(self))
1216
for cls in self.__class__.__mro__
1217
for name, athing in
1218
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1219
1220
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1221
out_signature = "s",
1222
path_keyword = 'object_path',
1223
connection_keyword = 'connection')
1224
def Introspect(self, object_path, connection):
1225
"""Overloading of standard D-Bus method.
1226
1227
Inserts annotation tags on methods and signals.
1228
"""
1229
xmlstring = dbus.service.Object.Introspect(self, object_path,
1230
connection)
1231
try:
1232
document = xml.dom.minidom.parseString(xmlstring)
1233
1234
for if_tag in document.getElementsByTagName("interface"):
1235
# Add annotation tags
1236
for typ in ("method", "signal"):
1237
for tag in if_tag.getElementsByTagName(typ):
1238
annots = dict()
1239
for name, prop in (self.
1240
_get_all_dbus_things(typ)):
1241
if (name == tag.getAttribute("name")
1242
and prop._dbus_interface
1243
== if_tag.getAttribute("name")):
1244
annots.update(getattr(
1245
prop, "_dbus_annotations", {}))
1246
for name, value in annots.items():
1247
ann_tag = document.createElement(
1248
"annotation")
1249
ann_tag.setAttribute("name", name)
1250
ann_tag.setAttribute("value", value)
1251
tag.appendChild(ann_tag)
1252
# Add interface annotation tags
1253
for annotation, value in dict(
1254
itertools.chain.from_iterable(
1255
annotations().items()
1256
for name, annotations
1257
in self._get_all_dbus_things("interface")
1258
if name == if_tag.getAttribute("name")
1259
)).items():
1260
ann_tag = document.createElement("annotation")
1261
ann_tag.setAttribute("name", annotation)
1262
ann_tag.setAttribute("value", value)
1263
if_tag.appendChild(ann_tag)
1264
# Fix argument name for the Introspect method itself
1265
if (if_tag.getAttribute("name")
1266
== dbus.INTROSPECTABLE_IFACE):
1267
for cn in if_tag.getElementsByTagName("method"):
1268
if cn.getAttribute("name") == "Introspect":
1269
for arg in cn.getElementsByTagName("arg"):
1270
if (arg.getAttribute("direction")
1271
== "out"):
1272
arg.setAttribute("name",
1273
"xml_data")
1274
xmlstring = document.toxml("utf-8")
1275
document.unlink()
1276
except (AttributeError, xml.dom.DOMException,
1277
xml.parsers.expat.ExpatError) as error:
1278
logger.error("Failed to override Introspection method",
1279
exc_info=error)
1280
return xmlstring
1281
1282
1283
class DBusObjectWithProperties(DBusObjectWithAnnotations):
529
class DBusObjectWithProperties(dbus.service.Object):
1284
530
"""A D-Bus object with properties.
1285
531
1286
532
Classes inheriting from this can use the dbus_service_property
1287
533
decorator to expose methods as D-Bus properties. It exposes the
1288
534
standard Get(), Set(), and GetAll() methods on the D-Bus.
1289
535
"""
1290
536
537
@staticmethod
538
def _is_dbus_property(obj):
539
return getattr(obj, u"_dbus_is_property", False)
540
541
def _get_all_dbus_properties(self):
542
"""Returns a generator of (name, attribute) pairs
543
"""
544
return ((prop._dbus_name, prop)
545
for name, prop in
546
inspect.getmembers(self, self._is_dbus_property))
547
1291
548
def _get_dbus_property(self, interface_name, property_name):
1292
549
"""Returns a bound method if one exists which is a D-Bus
1293
550
property with the specified name and interface.
1294
551
"""
1295
for cls in self.__class__.__mro__:
1296
for name, value in inspect.getmembers(
1297
cls, self._is_dbus_thing("property")):
1298
if (value._dbus_name == property_name
1299
and value._dbus_interface == interface_name):
1300
return value.__get__(self)
1301
552
for name in (property_name,
553
property_name + u"_dbus_property"):
554
prop = getattr(self, name, None)
555
if (prop is None
556
or not self._is_dbus_property(prop)
557
or prop._dbus_name != property_name
558
or (interface_name and prop._dbus_interface
559
and interface_name != prop._dbus_interface)):
560
continue
561
return prop
1302
562
# No such property
1303
raise DBusPropertyNotFound("{}:{}.{}".format(
1304
self.dbus_object_path, interface_name, property_name))
1305
1306
@classmethod
1307
def _get_all_interface_names(cls):
1308
"""Get a sequence of all interfaces supported by an object"""
1309
return (name for name in set(getattr(getattr(x, attr),
1310
"_dbus_interface", None)
1311
for x in (inspect.getmro(cls))
1312
for attr in dir(x))
1313
if name is not None)
1314
1315
@dbus.service.method(dbus.PROPERTIES_IFACE,
1316
in_signature="ss",
1317
out_signature="v")
563
raise DBusPropertyNotFound(self.dbus_object_path + u":"
564
+ interface_name + u"."
565
+ property_name)
566
567
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
568
out_signature=u"v")
1318
569
def Get(self, interface_name, property_name):
1319
570
"""Standard D-Bus property Get() method, see D-Bus standard.
1320
571
"""
1321
572
prop = self._get_dbus_property(interface_name, property_name)
1322
if prop._dbus_access == "write":
573
if prop._dbus_access == u"write":
1323
574
raise DBusPropertyAccessException(property_name)
1324
575
value = prop()
1325
if not hasattr(value, "variant_level"):
576
if not hasattr(value, u"variant_level"):
1326
577
return value
1327
578
return type(value)(value, variant_level=value.variant_level+1)
1328
579
1329
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
580
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
1330
581
def Set(self, interface_name, property_name, value):
1331
582
"""Standard D-Bus property Set() method, see D-Bus standard.
1332
583
"""
1333
584
prop = self._get_dbus_property(interface_name, property_name)
1334
if prop._dbus_access == "read":
585
if prop._dbus_access == u"read":
1335
586
raise DBusPropertyAccessException(property_name)
1336
if prop._dbus_get_args_options["byte_arrays"]:
587
if prop._dbus_get_args_options[u"byte_arrays"]:
1337
588
# The byte_arrays option is not supported yet on
1338
589
# signatures other than "ay".
1339
if prop._dbus_signature != "ay":
1340
raise ValueError("Byte arrays not supported for non-"
1341
"'ay' signature {!r}"
1342
.format(prop._dbus_signature))
1343
value = dbus.ByteArray(b''.join(chr(byte)
1344
for byte in value))
590
if prop._dbus_signature != u"ay":
591
raise ValueError
592
value = dbus.ByteArray(''.join(unichr(byte)
593
for byte in value))
1345
594
prop(value)
1346
595
1347
@dbus.service.method(dbus.PROPERTIES_IFACE,
1348
in_signature="s",
1349
out_signature="a{sv}")
596
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
597
out_signature=u"a{sv}")
1350
598
def GetAll(self, interface_name):
1351
599
"""Standard D-Bus property GetAll() method, see D-Bus
1352
600
standard.
1353
601
1354
602
Note: Will not include properties with access="write".
1355
603
"""
1356
properties = {}
1357
for name, prop in self._get_all_dbus_things("property"):
604
all = {}
605
for name, prop in self._get_all_dbus_properties():
1358
606
if (interface_name
1359
607
and interface_name != prop._dbus_interface):
1360
608
# Interface non-empty but did not match
1361
609
continue
1362
610
# Ignore write-only properties
1363
if prop._dbus_access == "write":
611
if prop._dbus_access == u"write":
1364
612
continue
1365
613
value = prop()
1366
if not hasattr(value, "variant_level"):
1367
properties[name] = value
614
if not hasattr(value, u"variant_level"):
615
all[name] = value
1368
616
continue
1369
properties[name] = type(value)(
1370
value, variant_level = value.variant_level + 1)
1371
return dbus.Dictionary(properties, signature="sv")
1372
1373
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1374
def PropertiesChanged(self, interface_name, changed_properties,
1375
invalidated_properties):
1376
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1377
standard.
1378
"""
1379
pass
617
all[name] = type(value)(value, variant_level=
618
value.variant_level+1)
619
return dbus.Dictionary(all, signature=u"sv")
1380
620
1381
621
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1382
out_signature="s",
622
out_signature=u"s",
1383
623
path_keyword='object_path',
1384
624
connection_keyword='connection')
1385
625
def Introspect(self, object_path, connection):
1386
"""Overloading of standard D-Bus method.
1387
1388
Inserts property tags and interface annotation tags.
626
"""Standard D-Bus method, overloaded to insert property tags.
1389
627
"""
1390
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1391
object_path,
1392
connection)
628
xmlstring = dbus.service.Object.Introspect(self, object_path,
629
connection)
1393
630
try:
1394
631
document = xml.dom.minidom.parseString(xmlstring)
1395
1396
632
def make_tag(document, name, prop):
1397
e = document.createElement("property")
1398
e.setAttribute("name", name)
1399
e.setAttribute("type", prop._dbus_signature)
1400
e.setAttribute("access", prop._dbus_access)
633
e = document.createElement(u"property")
634
e.setAttribute(u"name", name)
635
e.setAttribute(u"type", prop._dbus_signature)
636
e.setAttribute(u"access", prop._dbus_access)
1401
637
return e
1402
1403
for if_tag in document.getElementsByTagName("interface"):
1404
# Add property tags
638
for if_tag in document.getElementsByTagName(u"interface"):
1405
639
for tag in (make_tag(document, name, prop)
1406
640
for name, prop
1407
in self._get_all_dbus_things("property")
641
in self._get_all_dbus_properties()
1408
642
if prop._dbus_interface
1409
== if_tag.getAttribute("name")):
643
== if_tag.getAttribute(u"name")):
1410
644
if_tag.appendChild(tag)
1411
# Add annotation tags for properties
1412
for tag in if_tag.getElementsByTagName("property"):
1413
annots = dict()
1414
for name, prop in self._get_all_dbus_things(
1415
"property"):
1416
if (name == tag.getAttribute("name")
1417
and prop._dbus_interface
1418
== if_tag.getAttribute("name")):
1419
annots.update(getattr(
1420
prop, "_dbus_annotations", {}))
1421
for name, value in annots.items():
1422
ann_tag = document.createElement(
1423
"annotation")
1424
ann_tag.setAttribute("name", name)
1425
ann_tag.setAttribute("value", value)
1426
tag.appendChild(ann_tag)
1427
645
# Add the names to the return values for the
1428
646
# "org.freedesktop.DBus.Properties" methods
1429
if (if_tag.getAttribute("name")
1430
== "org.freedesktop.DBus.Properties"):
1431
for cn in if_tag.getElementsByTagName("method"):
1432
if cn.getAttribute("name") == "Get":
1433
for arg in cn.getElementsByTagName("arg"):
1434
if (arg.getAttribute("direction")
1435
== "out"):
1436
arg.setAttribute("name", "value")
1437
elif cn.getAttribute("name") == "GetAll":
1438
for arg in cn.getElementsByTagName("arg"):
1439
if (arg.getAttribute("direction")
1440
== "out"):
1441
arg.setAttribute("name", "props")
1442
xmlstring = document.toxml("utf-8")
1443
document.unlink()
1444
except (AttributeError, xml.dom.DOMException,
1445
xml.parsers.expat.ExpatError) as error:
1446
logger.error("Failed to override Introspection method",
1447
exc_info=error)
1448
return xmlstring
1449
1450
try:
1451
dbus.OBJECT_MANAGER_IFACE
1452
except AttributeError:
1453
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1454
1455
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1456
"""A D-Bus object with an ObjectManager.
1457
1458
Classes inheriting from this exposes the standard
1459
GetManagedObjects call and the InterfacesAdded and
1460
InterfacesRemoved signals on the standard
1461
"org.freedesktop.DBus.ObjectManager" interface.
1462
1463
Note: No signals are sent automatically; they must be sent
1464
manually.
1465
"""
1466
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1467
out_signature = "a{oa{sa{sv}}}")
1468
def GetManagedObjects(self):
1469
"""This function must be overridden"""
1470
raise NotImplementedError()
1471
1472
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1473
signature = "oa{sa{sv}}")
1474
def InterfacesAdded(self, object_path, interfaces_and_properties):
1475
pass
1476
1477
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1478
def InterfacesRemoved(self, object_path, interfaces):
1479
pass
1480
1481
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1482
out_signature = "s",
1483
path_keyword = 'object_path',
1484
connection_keyword = 'connection')
1485
def Introspect(self, object_path, connection):
1486
"""Overloading of standard D-Bus method.
1487
1488
Override return argument name of GetManagedObjects to be
1489
"objpath_interfaces_and_properties"
1490
"""
1491
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1492
object_path,
1493
connection)
1494
try:
1495
document = xml.dom.minidom.parseString(xmlstring)
1496
1497
for if_tag in document.getElementsByTagName("interface"):
1498
# Fix argument name for the GetManagedObjects method
1499
if (if_tag.getAttribute("name")
1500
== dbus.OBJECT_MANAGER_IFACE):
1501
for cn in if_tag.getElementsByTagName("method"):
1502
if (cn.getAttribute("name")
1503
== "GetManagedObjects"):
1504
for arg in cn.getElementsByTagName("arg"):
1505
if (arg.getAttribute("direction")
1506
== "out"):
1507
arg.setAttribute(
1508
"name",
1509
"objpath_interfaces"
1510
"_and_properties")
1511
xmlstring = document.toxml("utf-8")
1512
document.unlink()
1513
except (AttributeError, xml.dom.DOMException,
1514
xml.parsers.expat.ExpatError) as error:
1515
logger.error("Failed to override Introspection method",
1516
exc_info = error)
1517
return xmlstring
1518
1519
def datetime_to_dbus(dt, variant_level=0):
1520
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1521
if dt is None:
1522
return dbus.String("", variant_level = variant_level)
1523
return dbus.String(dt.isoformat(), variant_level=variant_level)
1524
1525
1526
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1527
"""A class decorator; applied to a subclass of
1528
dbus.service.Object, it will add alternate D-Bus attributes with
1529
interface names according to the "alt_interface_names" mapping.
1530
Usage:
1531
1532
@alternate_dbus_interfaces({"org.example.Interface":
1533
"net.example.AlternateInterface"})
1534
class SampleDBusObject(dbus.service.Object):
1535
@dbus.service.method("org.example.Interface")
1536
def SampleDBusMethod():
1537
pass
1538
1539
The above "SampleDBusMethod" on "SampleDBusObject" will be
1540
reachable via two interfaces: "org.example.Interface" and
1541
"net.example.AlternateInterface", the latter of which will have
1542
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1543
"true", unless "deprecate" is passed with a False value.
1544
1545
This works for methods and signals, and also for D-Bus properties
1546
(from DBusObjectWithProperties) and interfaces (from the
1547
dbus_interface_annotations decorator).
1548
"""
1549
1550
def wrapper(cls):
1551
for orig_interface_name, alt_interface_name in (
1552
alt_interface_names.items()):
1553
attr = {}
1554
interface_names = set()
1555
# Go though all attributes of the class
1556
for attrname, attribute in inspect.getmembers(cls):
1557
# Ignore non-D-Bus attributes, and D-Bus attributes
1558
# with the wrong interface name
1559
if (not hasattr(attribute, "_dbus_interface")
1560
or not attribute._dbus_interface.startswith(
1561
orig_interface_name)):
1562
continue
1563
# Create an alternate D-Bus interface name based on
1564
# the current name
1565
alt_interface = attribute._dbus_interface.replace(
1566
orig_interface_name, alt_interface_name)
1567
interface_names.add(alt_interface)
1568
# Is this a D-Bus signal?
1569
if getattr(attribute, "_dbus_is_signal", False):
1570
# Extract the original non-method undecorated
1571
# function by black magic
1572
if sys.version_info.major == 2:
1573
nonmethod_func = (dict(
1574
zip(attribute.func_code.co_freevars,
1575
attribute.__closure__))
1576
["func"].cell_contents)
1577
else:
1578
nonmethod_func = (dict(
1579
zip(attribute.__code__.co_freevars,
1580
attribute.__closure__))
1581
["func"].cell_contents)
1582
# Create a new, but exactly alike, function
1583
# object, and decorate it to be a new D-Bus signal
1584
# with the alternate D-Bus interface name
1585
new_function = copy_function(nonmethod_func)
1586
new_function = (dbus.service.signal(
1587
alt_interface,
1588
attribute._dbus_signature)(new_function))
1589
# Copy annotations, if any
1590
try:
1591
new_function._dbus_annotations = dict(
1592
attribute._dbus_annotations)
1593
except AttributeError:
1594
pass
1595
# Define a creator of a function to call both the
1596
# original and alternate functions, so both the
1597
# original and alternate signals gets sent when
1598
# the function is called
1599
def fixscope(func1, func2):
1600
"""This function is a scope container to pass
1601
func1 and func2 to the "call_both" function
1602
outside of its arguments"""
1603
1604
@functools.wraps(func2)
1605
def call_both(*args, **kwargs):
1606
"""This function will emit two D-Bus
1607
signals by calling func1 and func2"""
1608
func1(*args, **kwargs)
1609
func2(*args, **kwargs)
1610
# Make wrapper function look like a D-Bus signal
1611
for name, attr in inspect.getmembers(func2):
1612
if name.startswith("_dbus_"):
1613
setattr(call_both, name, attr)
1614
1615
return call_both
1616
# Create the "call_both" function and add it to
1617
# the class
1618
attr[attrname] = fixscope(attribute, new_function)
1619
# Is this a D-Bus method?
1620
elif getattr(attribute, "_dbus_is_method", False):
1621
# Create a new, but exactly alike, function
1622
# object. Decorate it to be a new D-Bus method
1623
# with the alternate D-Bus interface name. Add it
1624
# to the class.
1625
attr[attrname] = (
1626
dbus.service.method(
1627
alt_interface,
1628
attribute._dbus_in_signature,
1629
attribute._dbus_out_signature)
1630
(copy_function(attribute)))
1631
# Copy annotations, if any
1632
try:
1633
attr[attrname]._dbus_annotations = dict(
1634
attribute._dbus_annotations)
1635
except AttributeError:
1636
pass
1637
# Is this a D-Bus property?
1638
elif getattr(attribute, "_dbus_is_property", False):
1639
# Create a new, but exactly alike, function
1640
# object, and decorate it to be a new D-Bus
1641
# property with the alternate D-Bus interface
1642
# name. Add it to the class.
1643
attr[attrname] = (dbus_service_property(
1644
alt_interface, attribute._dbus_signature,
1645
attribute._dbus_access,
1646
attribute._dbus_get_args_options
1647
["byte_arrays"])
1648
(copy_function(attribute)))
1649
# Copy annotations, if any
1650
try:
1651
attr[attrname]._dbus_annotations = dict(
1652
attribute._dbus_annotations)
1653
except AttributeError:
1654
pass
1655
# Is this a D-Bus interface?
1656
elif getattr(attribute, "_dbus_is_interface", False):
1657
# Create a new, but exactly alike, function
1658
# object. Decorate it to be a new D-Bus interface
1659
# with the alternate D-Bus interface name. Add it
1660
# to the class.
1661
attr[attrname] = (
1662
dbus_interface_annotations(alt_interface)
1663
(copy_function(attribute)))
1664
if deprecate:
1665
# Deprecate all alternate interfaces
1666
iname="_AlternateDBusNames_interface_annotation{}"
1667
for interface_name in interface_names:
1668
1669
@dbus_interface_annotations(interface_name)
1670
def func(self):
1671
return { "org.freedesktop.DBus.Deprecated":
1672
"true" }
1673
# Find an unused name
1674
for aname in (iname.format(i)
1675
for i in itertools.count()):
1676
if aname not in attr:
1677
attr[aname] = func
1678
break
1679
if interface_names:
1680
# Replace the class with a new subclass of it with
1681
# methods, signals, etc. as created above.
1682
if sys.version_info.major == 2:
1683
cls = type(b"{}Alternate".format(cls.__name__),
1684
(cls, ), attr)
1685
else:
1686
cls = type("{}Alternate".format(cls.__name__),
1687
(cls, ), attr)
1688
return cls
1689
1690
return wrapper
1691
1692
1693
@alternate_dbus_interfaces({"se.recompile.Mandos":
1694
"se.bsnet.fukt.Mandos"})
647
if (if_tag.getAttribute(u"name")
648
== u"org.freedesktop.DBus.Properties"):
649
for cn in if_tag.getElementsByTagName(u"method"):
650
if cn.getAttribute(u"name") == u"Get":
651
for arg in cn.getElementsByTagName(u"arg"):
652
if (arg.getAttribute(u"direction")
653
== u"out"):
654
arg.setAttribute(u"name", u"value")
655
elif cn.getAttribute(u"name") == u"GetAll":
656
for arg in cn.getElementsByTagName(u"arg"):
657
if (arg.getAttribute(u"direction")
658
== u"out"):
659
arg.setAttribute(u"name", u"props")
660
xmlstring = document.toxml(u"utf-8")
661
document.unlink()
662
except (AttributeError, xml.dom.DOMException,
663
xml.parsers.expat.ExpatError), error:
664
logger.error(u"Failed to override Introspection method",
665
error)
666
return xmlstring
667
668
1695
669
class ClientDBus(Client, DBusObjectWithProperties):
1696
670
"""A Client class using D-Bus
1697
671
1699
673
dbus_object_path: dbus.ObjectPath
1700
674
bus: dbus.SystemBus()
1701
675
"""
1702
1703
runtime_expansions = (Client.runtime_expansions
1704
+ ("dbus_object_path", ))
1705
1706
_interface = "se.recompile.Mandos.Client"
1707
1708
676
# dbus.service.Object doesn't use super(), so we can't either.
1709
677
1710
678
def __init__(self, bus = None, *args, **kwargs):
1712
680
Client.__init__(self, *args, **kwargs)
1713
681
# Only now, when this client is initialized, can it show up on
1714
682
# the D-Bus
1715
client_object_name = str(self.name).translate(
1716
{ord("."): ord("_"),
1717
ord("-"): ord("_")})
1718
self.dbus_object_path = dbus.ObjectPath(
1719
"/clients/" + client_object_name)
683
self.dbus_object_path = (dbus.ObjectPath
684
(u"/clients/"
685
+ self.name.replace(u".", u"_")))
1720
686
DBusObjectWithProperties.__init__(self, self.bus,
1721
687
self.dbus_object_path)
1722
688
1723
def notifychangeproperty(transform_func, dbus_name,
1724
type_func=lambda x: x,
1725
variant_level=1,
1726
invalidate_only=False,
1727
_interface=_interface):
1728
""" Modify a variable so that it's a property which announces
1729
its changes to DBus.
1730
1731
transform_fun: Function that takes a value and a variant_level
1732
and transforms it to a D-Bus type.
1733
dbus_name: D-Bus name of the variable
1734
type_func: Function that transform the value before sending it
1735
to the D-Bus. Default: no transform
1736
variant_level: D-Bus variant level. Default: 1
1737
"""
1738
attrname = "_{}".format(dbus_name)
1739
1740
def setter(self, value):
1741
if hasattr(self, "dbus_object_path"):
1742
if (not hasattr(self, attrname) or
1743
type_func(getattr(self, attrname, None))
1744
!= type_func(value)):
1745
if invalidate_only:
1746
self.PropertiesChanged(
1747
_interface, dbus.Dictionary(),
1748
dbus.Array((dbus_name, )))
1749
else:
1750
dbus_value = transform_func(
1751
type_func(value),
1752
variant_level = variant_level)
1753
self.PropertyChanged(dbus.String(dbus_name),
1754
dbus_value)
1755
self.PropertiesChanged(
1756
_interface,
1757
dbus.Dictionary({ dbus.String(dbus_name):
1758
dbus_value }),
1759
dbus.Array())
1760
setattr(self, attrname, value)
1761
1762
return property(lambda self: getattr(self, attrname), setter)
1763
1764
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1765
approvals_pending = notifychangeproperty(dbus.Boolean,
1766
"ApprovalPending",
1767
type_func = bool)
1768
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1769
last_enabled = notifychangeproperty(datetime_to_dbus,
1770
"LastEnabled")
1771
checker = notifychangeproperty(
1772
dbus.Boolean, "CheckerRunning",
1773
type_func = lambda checker: checker is not None)
1774
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1775
"LastCheckedOK")
1776
last_checker_status = notifychangeproperty(dbus.Int16,
1777
"LastCheckerStatus")
1778
last_approval_request = notifychangeproperty(
1779
datetime_to_dbus, "LastApprovalRequest")
1780
approved_by_default = notifychangeproperty(dbus.Boolean,
1781
"ApprovedByDefault")
1782
approval_delay = notifychangeproperty(
1783
dbus.UInt64, "ApprovalDelay",
1784
type_func = lambda td: td.total_seconds() * 1000)
1785
approval_duration = notifychangeproperty(
1786
dbus.UInt64, "ApprovalDuration",
1787
type_func = lambda td: td.total_seconds() * 1000)
1788
host = notifychangeproperty(dbus.String, "Host")
1789
timeout = notifychangeproperty(
1790
dbus.UInt64, "Timeout",
1791
type_func = lambda td: td.total_seconds() * 1000)
1792
extended_timeout = notifychangeproperty(
1793
dbus.UInt64, "ExtendedTimeout",
1794
type_func = lambda td: td.total_seconds() * 1000)
1795
interval = notifychangeproperty(
1796
dbus.UInt64, "Interval",
1797
type_func = lambda td: td.total_seconds() * 1000)
1798
checker_command = notifychangeproperty(dbus.String, "Checker")
1799
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1800
invalidate_only=True)
1801
1802
del notifychangeproperty
689
@staticmethod
690
def _datetime_to_dbus(dt, variant_level=0):
691
"""Convert a UTC datetime.datetime() to a D-Bus type."""
692
return dbus.String(dt.isoformat(),
693
variant_level=variant_level)
694
695
def enable(self):
696
oldstate = getattr(self, u"enabled", False)
697
r = Client.enable(self)
698
if oldstate != self.enabled:
699
# Emit D-Bus signals
700
self.PropertyChanged(dbus.String(u"enabled"),
701
dbus.Boolean(True, variant_level=1))
702
self.PropertyChanged(
703
dbus.String(u"last_enabled"),
704
self._datetime_to_dbus(self.last_enabled,
705
variant_level=1))
706
return r
707
708
def disable(self, quiet = False):
709
oldstate = getattr(self, u"enabled", False)
710
r = Client.disable(self, quiet=quiet)
711
if not quiet and oldstate != self.enabled:
712
# Emit D-Bus signal
713
self.PropertyChanged(dbus.String(u"enabled"),
714
dbus.Boolean(False, variant_level=1))
715
return r
1803
716
1804
717
def __del__(self, *args, **kwargs):
1805
718
try:
1806
719
self.remove_from_connection()
1807
720
except LookupError:
1808
721
pass
1809
if hasattr(DBusObjectWithProperties, "__del__"):
722
if hasattr(DBusObjectWithProperties, u"__del__"):
1810
723
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1811
724
Client.__del__(self, *args, **kwargs)
1812
725
1813
def checker_callback(self, source, condition,
1814
connection, command, *args, **kwargs):
1815
ret = Client.checker_callback(self, source, condition,
1816
connection, command, *args,
1817
**kwargs)
1818
exitstatus = self.last_checker_status
1819
if exitstatus >= 0:
726
def checker_callback(self, pid, condition, command,
727
*args, **kwargs):
728
self.checker_callback_tag = None
729
self.checker = None
730
# Emit D-Bus signal
731
self.PropertyChanged(dbus.String(u"checker_running"),
732
dbus.Boolean(False, variant_level=1))
733
if os.WIFEXITED(condition):
734
exitstatus = os.WEXITSTATUS(condition)
1820
735
# Emit D-Bus signal
1821
736
self.CheckerCompleted(dbus.Int16(exitstatus),
1822
# This is specific to GNU libC
1823
dbus.Int64(exitstatus << 8),
737
dbus.Int64(condition),
1824
738
dbus.String(command))
1825
739
else:
1826
740
# Emit D-Bus signal
1827
741
self.CheckerCompleted(dbus.Int16(-1),
1828
dbus.Int64(
1829
# This is specific to GNU libC
1830
(exitstatus << 8)
1831
| self.last_checker_signal),
742
dbus.Int64(condition),
1832
743
dbus.String(command))
1833
return ret
744
745
return Client.checker_callback(self, pid, condition, command,
746
*args, **kwargs)
747
748
def checked_ok(self, *args, **kwargs):
749
r = Client.checked_ok(self, *args, **kwargs)
750
# Emit D-Bus signal
751
self.PropertyChanged(
752
dbus.String(u"last_checked_ok"),
753
(self._datetime_to_dbus(self.last_checked_ok,
754
variant_level=1)))
755
return r
1834
756
1835
757
def start_checker(self, *args, **kwargs):
1836
old_checker_pid = getattr(self.checker, "pid", None)
758
old_checker = self.checker
759
if self.checker is not None:
760
old_checker_pid = self.checker.pid
761
else:
762
old_checker_pid = None
1837
763
r = Client.start_checker(self, *args, **kwargs)
1838
764
# Only if new checker process was started
1839
765
if (self.checker is not None
1840
766
and old_checker_pid != self.checker.pid):
1841
767
# Emit D-Bus signal
1842
768
self.CheckerStarted(self.current_checker_command)
1843
return r
1844
1845
def _reset_approved(self):
1846
self.approved = None
1847
return False
1848
1849
def approve(self, value=True):
1850
self.approved = value
1851
GLib.timeout_add(int(self.approval_duration.total_seconds()
1852
* 1000), self._reset_approved)
1853
self.send_changedstate()
1854
1855
## D-Bus methods, signals & properties
1856
1857
## Interfaces
1858
1859
## Signals
769
self.PropertyChanged(
770
dbus.String(u"checker_running"),
771
dbus.Boolean(True, variant_level=1))
772
return r
773
774
def stop_checker(self, *args, **kwargs):
775
old_checker = getattr(self, u"checker", None)
776
r = Client.stop_checker(self, *args, **kwargs)
777
if (old_checker is not None
778
and getattr(self, u"checker", None) is None):
779
self.PropertyChanged(dbus.String(u"checker_running"),
780
dbus.Boolean(False, variant_level=1))
781
return r
782
783
## D-Bus methods & signals
784
_interface = u"se.bsnet.fukt.Mandos.Client"
785
786
# CheckedOK - method
787
@dbus.service.method(_interface)
788
def CheckedOK(self):
789
return self.checked_ok()
1860
790
1861
791
# CheckerCompleted - signal
1862
@dbus.service.signal(_interface, signature="nxs")
792
@dbus.service.signal(_interface, signature=u"nxs")
1863
793
def CheckerCompleted(self, exitcode, waitstatus, command):
1864
794
"D-Bus signal"
1865
795
pass
1866
796
1867
797
# CheckerStarted - signal
1868
@dbus.service.signal(_interface, signature="s")
798
@dbus.service.signal(_interface, signature=u"s")
1869
799
def CheckerStarted(self, command):
1870
800
"D-Bus signal"
1871
801
pass
1872
802
1873
803
# PropertyChanged - signal
1874
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1875
@dbus.service.signal(_interface, signature="sv")
804
@dbus.service.signal(_interface, signature=u"sv")
1876
805
def PropertyChanged(self, property, value):
1877
806
"D-Bus signal"
1878
807
pass
1880
809
# GotSecret - signal
1881
810
@dbus.service.signal(_interface)
1882
811
def GotSecret(self):
1883
"""D-Bus signal
1884
Is sent after a successful transfer of secret from the Mandos
1885
server to mandos-client
1886
"""
812
"D-Bus signal"
1887
813
pass
1888
814
1889
815
# Rejected - signal
1890
@dbus.service.signal(_interface, signature="s")
1891
def Rejected(self, reason):
816
@dbus.service.signal(_interface)
817
def Rejected(self):
1892
818
"D-Bus signal"
1893
819
pass
1894
820
1895
# NeedApproval - signal
1896
@dbus.service.signal(_interface, signature="tb")
1897
def NeedApproval(self, timeout, default):
1898
"D-Bus signal"
1899
return self.need_approval()
1900
1901
## Methods
1902
1903
# Approve - method
1904
@dbus.service.method(_interface, in_signature="b")
1905
def Approve(self, value):
1906
self.approve(value)
1907
1908
# CheckedOK - method
1909
@dbus.service.method(_interface)
1910
def CheckedOK(self):
1911
self.checked_ok()
1912
1913
821
# Enable - method
1914
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1915
822
@dbus.service.method(_interface)
1916
823
def Enable(self):
1917
824
"D-Bus method"
1918
825
self.enable()
1919
826
1920
827
# StartChecker - method
1921
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1922
828
@dbus.service.method(_interface)
1923
829
def StartChecker(self):
1924
830
"D-Bus method"
1925
831
self.start_checker()
1926
832
1927
833
# Disable - method
1928
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1929
834
@dbus.service.method(_interface)
1930
835
def Disable(self):
1931
836
"D-Bus method"
1932
837
self.disable()
1933
838
1934
839
# StopChecker - method
1935
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1936
840
@dbus.service.method(_interface)
1937
841
def StopChecker(self):
1938
842
self.stop_checker()
1939
843
1940
## Properties
1941
1942
# ApprovalPending - property
1943
@dbus_service_property(_interface, signature="b", access="read")
1944
def ApprovalPending_dbus_property(self):
1945
return dbus.Boolean(bool(self.approvals_pending))
1946
1947
# ApprovedByDefault - property
1948
@dbus_service_property(_interface,
1949
signature="b",
1950
access="readwrite")
1951
def ApprovedByDefault_dbus_property(self, value=None):
1952
if value is None: # get
1953
return dbus.Boolean(self.approved_by_default)
1954
self.approved_by_default = bool(value)
1955
1956
# ApprovalDelay - property
1957
@dbus_service_property(_interface,
1958
signature="t",
1959
access="readwrite")
1960
def ApprovalDelay_dbus_property(self, value=None):
1961
if value is None: # get
1962
return dbus.UInt64(self.approval_delay.total_seconds()
1963
* 1000)
1964
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1965
1966
# ApprovalDuration - property
1967
@dbus_service_property(_interface,
1968
signature="t",
1969
access="readwrite")
1970
def ApprovalDuration_dbus_property(self, value=None):
1971
if value is None: # get
1972
return dbus.UInt64(self.approval_duration.total_seconds()
1973
* 1000)
1974
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1975
1976
# Name - property
1977
@dbus_annotations(
1978
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1979
@dbus_service_property(_interface, signature="s", access="read")
1980
def Name_dbus_property(self):
844
# name - property
845
@dbus_service_property(_interface, signature=u"s", access=u"read")
846
def name_dbus_property(self):
1981
847
return dbus.String(self.name)
1982
848
1983
# Fingerprint - property
1984
@dbus_annotations(
1985
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1986
@dbus_service_property(_interface, signature="s", access="read")
1987
def Fingerprint_dbus_property(self):
849
# fingerprint - property
850
@dbus_service_property(_interface, signature=u"s", access=u"read")
851
def fingerprint_dbus_property(self):
1988
852
return dbus.String(self.fingerprint)
1989
853
1990
# Host - property
1991
@dbus_service_property(_interface,
1992
signature="s",
1993
access="readwrite")
1994
def Host_dbus_property(self, value=None):
854
# host - property
855
@dbus_service_property(_interface, signature=u"s",
856
access=u"readwrite")
857
def host_dbus_property(self, value=None):
1995
858
if value is None: # get
1996
859
return dbus.String(self.host)
1997
self.host = str(value)
1998
1999
# Created - property
2000
@dbus_annotations(
2001
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2002
@dbus_service_property(_interface, signature="s", access="read")
2003
def Created_dbus_property(self):
2004
return datetime_to_dbus(self.created)
2005
2006
# LastEnabled - property
2007
@dbus_service_property(_interface, signature="s", access="read")
2008
def LastEnabled_dbus_property(self):
2009
return datetime_to_dbus(self.last_enabled)
2010
2011
# Enabled - property
2012
@dbus_service_property(_interface,
2013
signature="b",
2014
access="readwrite")
2015
def Enabled_dbus_property(self, value=None):
860
self.host = value
861
# Emit D-Bus signal
862
self.PropertyChanged(dbus.String(u"host"),
863
dbus.String(value, variant_level=1))
864
865
# created - property
866
@dbus_service_property(_interface, signature=u"s", access=u"read")
867
def created_dbus_property(self):
868
return dbus.String(self._datetime_to_dbus(self.created))
869
870
# last_enabled - property
871
@dbus_service_property(_interface, signature=u"s", access=u"read")
872
def last_enabled_dbus_property(self):
873
if self.last_enabled is None:
874
return dbus.String(u"")
875
return dbus.String(self._datetime_to_dbus(self.last_enabled))
876
877
# enabled - property
878
@dbus_service_property(_interface, signature=u"b",
879
access=u"readwrite")
880
def enabled_dbus_property(self, value=None):
2016
881
if value is None: # get
2017
882
return dbus.Boolean(self.enabled)
2018
883
if value:
2020
885
else:
2021
886
self.disable()
2022
887
2023
# LastCheckedOK - property
2024
@dbus_service_property(_interface,
2025
signature="s",
2026
access="readwrite")
2027
def LastCheckedOK_dbus_property(self, value=None):
888
# last_checked_ok - property
889
@dbus_service_property(_interface, signature=u"s",
890
access=u"readwrite")
891
def last_checked_ok_dbus_property(self, value=None):
2028
892
if value is not None:
2029
893
self.checked_ok()
2030
894
return
2031
return datetime_to_dbus(self.last_checked_ok)
2032
2033
# LastCheckerStatus - property
2034
@dbus_service_property(_interface, signature="n", access="read")
2035
def LastCheckerStatus_dbus_property(self):
2036
return dbus.Int16(self.last_checker_status)
2037
2038
# Expires - property
2039
@dbus_service_property(_interface, signature="s", access="read")
2040
def Expires_dbus_property(self):
2041
return datetime_to_dbus(self.expires)
2042
2043
# LastApprovalRequest - property
2044
@dbus_service_property(_interface, signature="s", access="read")
2045
def LastApprovalRequest_dbus_property(self):
2046
return datetime_to_dbus(self.last_approval_request)
2047
2048
# Timeout - property
2049
@dbus_service_property(_interface,
2050
signature="t",
2051
access="readwrite")
2052
def Timeout_dbus_property(self, value=None):
895
if self.last_checked_ok is None:
896
return dbus.String(u"")
897
return dbus.String(self._datetime_to_dbus(self
898
.last_checked_ok))
899
900
# timeout - property
901
@dbus_service_property(_interface, signature=u"t",
902
access=u"readwrite")
903
def timeout_dbus_property(self, value=None):
2053
904
if value is None: # get
2054
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2055
old_timeout = self.timeout
905
return dbus.UInt64(self.timeout_milliseconds())
2056
906
self.timeout = datetime.timedelta(0, 0, 0, value)
2057
# Reschedule disabling
2058
if self.enabled:
2059
now = datetime.datetime.utcnow()
2060
self.expires += self.timeout - old_timeout
2061
if self.expires <= now:
2062
# The timeout has passed
2063
self.disable()
2064
else:
2065
if (getattr(self, "disable_initiator_tag", None)
2066
is None):
2067
return
2068
GLib.source_remove(self.disable_initiator_tag)
2069
self.disable_initiator_tag = GLib.timeout_add(
2070
int((self.expires - now).total_seconds() * 1000),
2071
self.disable)
2072
2073
# ExtendedTimeout - property
2074
@dbus_service_property(_interface,
2075
signature="t",
2076
access="readwrite")
2077
def ExtendedTimeout_dbus_property(self, value=None):
2078
if value is None: # get
2079
return dbus.UInt64(self.extended_timeout.total_seconds()
2080
* 1000)
2081
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2082
2083
# Interval - property
2084
@dbus_service_property(_interface,
2085
signature="t",
2086
access="readwrite")
2087
def Interval_dbus_property(self, value=None):
2088
if value is None: # get
2089
return dbus.UInt64(self.interval.total_seconds() * 1000)
907
# Emit D-Bus signal
908
self.PropertyChanged(dbus.String(u"timeout"),
909
dbus.UInt64(value, variant_level=1))
910
if getattr(self, u"disable_initiator_tag", None) is None:
911
return
912
# Reschedule timeout
913
gobject.source_remove(self.disable_initiator_tag)
914
self.disable_initiator_tag = None
915
time_to_die = (self.
916
_timedelta_to_milliseconds((self
917
.last_checked_ok
918
+ self.timeout)
919
- datetime.datetime
920
.utcnow()))
921
if time_to_die <= 0:
922
# The timeout has passed
923
self.disable()
924
else:
925
self.disable_initiator_tag = (gobject.timeout_add
926
(time_to_die, self.disable))
927
928
# interval - property
929
@dbus_service_property(_interface, signature=u"t",
930
access=u"readwrite")
931
def interval_dbus_property(self, value=None):
932
if value is None: # get
933
return dbus.UInt64(self.interval_milliseconds())
2090
934
self.interval = datetime.timedelta(0, 0, 0, value)
2091
if getattr(self, "checker_initiator_tag", None) is None:
935
# Emit D-Bus signal
936
self.PropertyChanged(dbus.String(u"interval"),
937
dbus.UInt64(value, variant_level=1))
938
if getattr(self, u"checker_initiator_tag", None) is None:
2092
939
return
2093
if self.enabled:
2094
# Reschedule checker run
2095
GLib.source_remove(self.checker_initiator_tag)
2096
self.checker_initiator_tag = GLib.timeout_add(
2097
value, self.start_checker)
2098
self.start_checker() # Start one now, too
2099
2100
# Checker - property
2101
@dbus_service_property(_interface,
2102
signature="s",
2103
access="readwrite")
2104
def Checker_dbus_property(self, value=None):
940
# Reschedule checker run
941
gobject.source_remove(self.checker_initiator_tag)
942
self.checker_initiator_tag = (gobject.timeout_add
943
(value, self.start_checker))
944
self.start_checker() # Start one now, too
945
946
# checker - property
947
@dbus_service_property(_interface, signature=u"s",
948
access=u"readwrite")
949
def checker_dbus_property(self, value=None):
2105
950
if value is None: # get
2106
951
return dbus.String(self.checker_command)
2107
self.checker_command = str(value)
952
self.checker_command = value
953
# Emit D-Bus signal
954
self.PropertyChanged(dbus.String(u"checker"),
955
dbus.String(self.checker_command,
956
variant_level=1))
2108
957
2109
# CheckerRunning - property
2110
@dbus_service_property(_interface,
2111
signature="b",
2112
access="readwrite")
2113
def CheckerRunning_dbus_property(self, value=None):
958
# checker_running - property
959
@dbus_service_property(_interface, signature=u"b",
960
access=u"readwrite")
961
def checker_running_dbus_property(self, value=None):
2114
962
if value is None: # get
2115
963
return dbus.Boolean(self.checker is not None)
2116
964
if value:
2118
966
else:
2119
967
self.stop_checker()
2120
968
2121
# ObjectPath - property
2122
@dbus_annotations(
2123
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2124
"org.freedesktop.DBus.Deprecated": "true"})
2125
@dbus_service_property(_interface, signature="o", access="read")
2126
def ObjectPath_dbus_property(self):
969
# object_path - property
970
@dbus_service_property(_interface, signature=u"o", access=u"read")
971
def object_path_dbus_property(self):
2127
972
return self.dbus_object_path # is already a dbus.ObjectPath
2128
973
2129
# Secret = property
2130
@dbus_annotations(
2131
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2132
"invalidates"})
2133
@dbus_service_property(_interface,
2134
signature="ay",
2135
access="write",
2136
byte_arrays=True)
2137
def Secret_dbus_property(self, value):
2138
self.secret = bytes(value)
974
# secret = property
975
@dbus_service_property(_interface, signature=u"ay",
976
access=u"write", byte_arrays=True)
977
def secret_dbus_property(self, value):
978
self.secret = str(value)
2139
979
2140
980
del _interface
2141
981
2142
982
2143
class ProxyClient(object):
2144
def __init__(self, child_pipe, fpr, address):
2145
self._pipe = child_pipe
2146
self._pipe.send(('init', fpr, address))
2147
if not self._pipe.recv():
2148
raise KeyError(fpr)
2149
2150
def __getattribute__(self, name):
2151
if name == '_pipe':
2152
return super(ProxyClient, self).__getattribute__(name)
2153
self._pipe.send(('getattr', name))
2154
data = self._pipe.recv()
2155
if data[0] == 'data':
2156
return data[1]
2157
if data[0] == 'function':
2158
2159
def func(*args, **kwargs):
2160
self._pipe.send(('funcall', name, args, kwargs))
2161
return self._pipe.recv()[1]
2162
2163
return func
2164
2165
def __setattr__(self, name, value):
2166
if name == '_pipe':
2167
return super(ProxyClient, self).__setattr__(name, value)
2168
self._pipe.send(('setattr', name, value))
2169
2170
2171
983
class ClientHandler(socketserver.BaseRequestHandler, object):
2172
984
"""A class to handle client connections.
2173
985
2175
987
Note: This will run in its own forked process."""
2176
988
2177
989
def handle(self):
2178
with contextlib.closing(self.server.child_pipe) as child_pipe:
2179
logger.info("TCP connection from: %s",
2180
str(self.client_address))
2181
logger.debug("Pipe FD: %d",
2182
self.server.child_pipe.fileno())
2183
2184
session = gnutls.ClientSession(self.request)
2185
2186
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
2187
# "+AES-256-CBC", "+SHA1",
2188
# "+COMP-NULL", "+CTYPE-OPENPGP",
2189
# "+DHE-DSS"))
990
logger.info(u"TCP connection from: %s",
991
unicode(self.client_address))
992
logger.debug(u"IPC Pipe FD: %d", self.server.child_pipe[1])
993
# Open IPC pipe to parent process
994
with contextlib.nested(os.fdopen(self.server.child_pipe[1],
995
u"w", 1),
996
os.fdopen(self.server.parent_pipe[0],
997
u"r", 0)) as (ipc,
998
ipc_return):
999
session = (gnutls.connection
1000
.ClientSession(self.request,
1001
gnutls.connection
1002
.X509Credentials()))
1003
1004
line = self.request.makefile().readline()
1005
logger.debug(u"Protocol version: %r", line)
1006
try:
1007
if int(line.strip().split()[0]) > 1:
1008
raise RuntimeError
1009
except (ValueError, IndexError, RuntimeError), error:
1010
logger.error(u"Unknown protocol version: %s", error)
1011
return
1012
1013
# Note: gnutls.connection.X509Credentials is really a
1014
# generic GnuTLS certificate credentials object so long as
1015
# no X.509 keys are added to it. Therefore, we can use it
1016
# here despite using OpenPGP certificates.
1017
1018
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1019
# u"+AES-256-CBC", u"+SHA1",
1020
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1021
# u"+DHE-DSS"))
2190
1022
# Use a fallback default, since this MUST be set.
2191
1023
priority = self.server.gnutls_priority
2192
1024
if priority is None:
2193
priority = "NORMAL"
2194
gnutls.priority_set_direct(session._c_object,
2195
priority.encode("utf-8"),
2196
None)
2197
2198
# Start communication using the Mandos protocol
2199
# Get protocol number
2200
line = self.request.makefile().readline()
2201
logger.debug("Protocol version: %r", line)
2202
try:
2203
if int(line.strip().split()[0]) > 1:
2204
raise RuntimeError(line)
2205
except (ValueError, IndexError, RuntimeError) as error:
2206
logger.error("Unknown protocol version: %s", error)
2207
return
2208
2209
# Start GnuTLS connection
1025
priority = u"NORMAL"
1026
(gnutls.library.functions
1027
.gnutls_priority_set_direct(session._c_object,
1028
priority, None))
1029
2210
1030
try:
2211
1031
session.handshake()
2212
except gnutls.Error as error:
2213
logger.warning("Handshake failed: %s", error)
1032
except gnutls.errors.GNUTLSError, error:
1033
logger.warning(u"Handshake failed: %s", error)
2214
1034
# Do not run session.bye() here: the session is not
2215
1035
# established. Just abandon the request.
2216
1036
return
2217
logger.debug("Handshake succeeded")
2218
2219
approval_required = False
1037
logger.debug(u"Handshake succeeded")
2220
1038
try:
2221
1039
try:
2222
fpr = self.fingerprint(
2223
self.peer_certificate(session))
2224
except (TypeError, gnutls.Error) as error:
2225
logger.warning("Bad certificate: %s", error)
2226
return
2227
logger.debug("Fingerprint: %s", fpr)
2228
2229
try:
2230
client = ProxyClient(child_pipe, fpr,
2231
self.client_address)
2232
except KeyError:
2233
return
2234
2235
if client.approval_delay:
2236
delay = client.approval_delay
2237
client.approvals_pending += 1
2238
approval_required = True
2239
2240
while True:
2241
if not client.enabled:
2242
logger.info("Client %s is disabled",
2243
client.name)
2244
if self.server.use_dbus:
2245
# Emit D-Bus signal
2246
client.Rejected("Disabled")
2247
return
2248
2249
if client.approved or not client.approval_delay:
2250
#We are approved or approval is disabled
1040
fpr = self.fingerprint(self.peer_certificate
1041
(session))
1042
except (TypeError, gnutls.errors.GNUTLSError), error:
1043
logger.warning(u"Bad certificate: %s", error)
1044
return
1045
logger.debug(u"Fingerprint: %s", fpr)
1046
1047
for c in self.server.clients:
1048
if c.fingerprint == fpr:
1049
client = c
2251
1050
break
2252
elif client.approved is None:
2253
logger.info("Client %s needs approval",
2254
client.name)
2255
if self.server.use_dbus:
2256
# Emit D-Bus signal
2257
client.NeedApproval(
2258
client.approval_delay.total_seconds()
2259
* 1000, client.approved_by_default)
2260
else:
2261
logger.warning("Client %s was not approved",
2262
client.name)
2263
if self.server.use_dbus:
2264
# Emit D-Bus signal
2265
client.Rejected("Denied")
2266
return
2267
2268
#wait until timeout or approved
2269
time = datetime.datetime.now()
2270
client.changedstate.acquire()
2271
client.changedstate.wait(delay.total_seconds())
2272
client.changedstate.release()
2273
time2 = datetime.datetime.now()
2274
if (time2 - time) >= delay:
2275
if not client.approved_by_default:
2276
logger.warning("Client %s timed out while"
2277
" waiting for approval",
2278
client.name)
2279
if self.server.use_dbus:
2280
# Emit D-Bus signal
2281
client.Rejected("Approval timed out")
2282
return
2283
else:
2284
break
2285
else:
2286
delay -= time2 - time
2287
2288
try:
2289
session.send(client.secret)
2290
except gnutls.Error as error:
2291
logger.warning("gnutls send failed",
2292
exc_info = error)
2293
return
2294
2295
logger.info("Sending secret to %s", client.name)
2296
# bump the timeout using extended_timeout
2297
client.bump_timeout(client.extended_timeout)
2298
if self.server.use_dbus:
2299
# Emit D-Bus signal
2300
client.GotSecret()
2301
1051
else:
1052
ipc.write(u"NOTFOUND %s %s\n"
1053
% (fpr, unicode(self.client_address)))
1054
return
1055
# Have to check if client.enabled, since it is
1056
# possible that the client was disabled since the
1057
# GnuTLS session was established.
1058
ipc.write(u"GETATTR enabled %s\n" % fpr)
1059
enabled = pickle.load(ipc_return)
1060
if not enabled:
1061
ipc.write(u"DISABLED %s\n" % client.name)
1062
return
1063
ipc.write(u"SENDING %s\n" % client.name)
1064
sent_size = 0
1065
while sent_size < len(client.secret):
1066
sent = session.send(client.secret[sent_size:])
1067
logger.debug(u"Sent: %d, remaining: %d",
1068
sent, len(client.secret)
1069
- (sent_size + sent))
1070
sent_size += sent
2302
1071
finally:
2303
if approval_required:
2304
client.approvals_pending -= 1
2305
try:
2306
session.bye()
2307
except gnutls.Error as error:
2308
logger.warning("GnuTLS bye failed",
2309
exc_info=error)
1072
session.bye()
2310
1073
2311
1074
@staticmethod
2312
1075
def peer_certificate(session):
2313
1076
"Return the peer's OpenPGP certificate as a bytestring"
2314
1077
# If not an OpenPGP certificate...
2315
if (gnutls.certificate_type_get(session._c_object)
2316
!= gnutls.CRT_OPENPGP):
2317
# ...return invalid data
2318
return b""
1078
if (gnutls.library.functions
1079
.gnutls_certificate_type_get(session._c_object)
1080
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1081
# ...do the normal thing
1082
return session.peer_certificate
2319
1083
list_size = ctypes.c_uint(1)
2320
cert_list = (gnutls.certificate_get_peers
1084
cert_list = (gnutls.library.functions
1085
.gnutls_certificate_get_peers
2321
1086
(session._c_object, ctypes.byref(list_size)))
2322
1087
if not bool(cert_list) and list_size.value != 0:
2323
raise gnutls.Error("error getting peer certificate")
1088
raise gnutls.errors.GNUTLSError(u"error getting peer"
1089
u" certificate")
2324
1090
if list_size.value == 0:
2325
1091
return None
2326
1092
cert = cert_list[0]
2330
1096
def fingerprint(openpgp):
2331
1097
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2332
1098
# New GnuTLS "datum" with the OpenPGP public key
2333
datum = gnutls.datum_t(
2334
ctypes.cast(ctypes.c_char_p(openpgp),
2335
ctypes.POINTER(ctypes.c_ubyte)),
2336
ctypes.c_uint(len(openpgp)))
1099
datum = (gnutls.library.types
1100
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1101
ctypes.POINTER
1102
(ctypes.c_ubyte)),
1103
ctypes.c_uint(len(openpgp))))
2337
1104
# New empty GnuTLS certificate
2338
crt = gnutls.openpgp_crt_t()
2339
gnutls.openpgp_crt_init(ctypes.byref(crt))
1105
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1106
(gnutls.library.functions
1107
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2340
1108
# Import the OpenPGP public key into the certificate
2341
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2342
gnutls.OPENPGP_FMT_RAW)
1109
(gnutls.library.functions
1110
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1111
gnutls.library.constants
1112
.GNUTLS_OPENPGP_FMT_RAW))
2343
1113
# Verify the self signature in the key
2344
1114
crtverify = ctypes.c_uint()
2345
gnutls.openpgp_crt_verify_self(crt, 0,
2346
ctypes.byref(crtverify))
1115
(gnutls.library.functions
1116
.gnutls_openpgp_crt_verify_self(crt, 0,
1117
ctypes.byref(crtverify)))
2347
1118
if crtverify.value != 0:
2348
gnutls.openpgp_crt_deinit(crt)
2349
raise gnutls.CertificateSecurityError("Verify failed")
1119
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1120
raise (gnutls.errors.CertificateSecurityError
1121
(u"Verify failed"))
2350
1122
# New buffer for the fingerprint
2351
1123
buf = ctypes.create_string_buffer(20)
2352
1124
buf_len = ctypes.c_size_t()
2353
1125
# Get the fingerprint from the certificate into the buffer
2354
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2355
ctypes.byref(buf_len))
1126
(gnutls.library.functions
1127
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1128
ctypes.byref(buf_len)))
2356
1129
# Deinit the certificate
2357
gnutls.openpgp_crt_deinit(crt)
1130
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2358
1131
# Convert the buffer to a Python bytestring
2359
1132
fpr = ctypes.string_at(buf, buf_len.value)
2360
1133
# Convert the bytestring to hexadecimal notation
2361
hex_fpr = binascii.hexlify(fpr).upper()
1134
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
2362
1135
return hex_fpr
2363
1136
2364
1137
2365
class MultiprocessingMixIn(object):
2366
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2367
2368
def sub_process_main(self, request, address):
2369
try:
2370
self.finish_request(request, address)
2371
except Exception:
2372
self.handle_error(request, address)
2373
self.close_request(request)
2374
2375
def process_request(self, request, address):
2376
"""Start a new process to process the request."""
2377
proc = multiprocessing.Process(target = self.sub_process_main,
2378
args = (request, address))
2379
proc.start()
2380
return proc
2381
2382
2383
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2384
""" adds a pipe to the MixIn """
2385
1138
class ForkingMixInWithPipes(socketserver.ForkingMixIn, object):
1139
"""Like socketserver.ForkingMixIn, but also pass a pipe pair."""
2386
1140
def process_request(self, request, client_address):
2387
1141
"""Overrides and wraps the original process_request().
2388
1142
2389
1143
This function creates a new pipe in self.pipe
2390
1144
"""
2391
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2392
2393
proc = MultiprocessingMixIn.process_request(self, request,
2394
client_address)
2395
self.child_pipe.close()
2396
self.add_pipe(parent_pipe, proc)
2397
2398
def add_pipe(self, parent_pipe, proc):
1145
self.child_pipe = os.pipe() # Child writes here
1146
self.parent_pipe = os.pipe() # Parent writes here
1147
super(ForkingMixInWithPipes,
1148
self).process_request(request, client_address)
1149
# Close unused ends for parent
1150
os.close(self.parent_pipe[0]) # close read end
1151
os.close(self.child_pipe[1]) # close write end
1152
self.add_pipe_fds(self.child_pipe[0], self.parent_pipe[1])
1153
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
2399
1154
"""Dummy function; override as necessary"""
2400
raise NotImplementedError()
2401
2402
2403
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1155
os.close(child_pipe_fd)
1156
os.close(parent_pipe_fd)
1157
1158
1159
class IPv6_TCPServer(ForkingMixInWithPipes,
2404
1160
socketserver.TCPServer, object):
2405
1161
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2406
1162
2409
1165
interface: None or a network interface name (string)
2410
1166
use_ipv6: Boolean; to use IPv6 or not
2411
1167
"""
2412
2413
1168
def __init__(self, server_address, RequestHandlerClass,
2414
interface=None,
2415
use_ipv6=True,
2416
socketfd=None):
2417
"""If socketfd is set, use that file descriptor instead of
2418
creating a new one with socket.socket().
2419
"""
1169
interface=None, use_ipv6=True):
2420
1170
self.interface = interface
2421
1171
if use_ipv6:
2422
1172
self.address_family = socket.AF_INET6
2423
if socketfd is not None:
2424
# Save the file descriptor
2425
self.socketfd = socketfd
2426
# Save the original socket.socket() function
2427
self.socket_socket = socket.socket
2428
# To implement --socket, we monkey patch socket.socket.
2429
#
2430
# (When socketserver.TCPServer is a new-style class, we
2431
# could make self.socket into a property instead of monkey
2432
# patching socket.socket.)
2433
#
2434
# Create a one-time-only replacement for socket.socket()
2435
@functools.wraps(socket.socket)
2436
def socket_wrapper(*args, **kwargs):
2437
# Restore original function so subsequent calls are
2438
# not affected.
2439
socket.socket = self.socket_socket
2440
del self.socket_socket
2441
# This time only, return a new socket object from the
2442
# saved file descriptor.
2443
return socket.fromfd(self.socketfd, *args, **kwargs)
2444
# Replace socket.socket() function with wrapper
2445
socket.socket = socket_wrapper
2446
# The socketserver.TCPServer.__init__ will call
2447
# socket.socket(), which might be our replacement,
2448
# socket_wrapper(), if socketfd was set.
2449
1173
socketserver.TCPServer.__init__(self, server_address,
2450
1174
RequestHandlerClass)
2451
2452
1175
def server_bind(self):
2453
1176
"""This overrides the normal server_bind() function
2454
1177
to bind to an interface if one was specified, and also NOT to
2455
1178
bind to an address or port if they were not specified."""
2456
1179
if self.interface is not None:
2457
1180
if SO_BINDTODEVICE is None:
2458
# Fall back to a hard-coded value which seems to be
2459
# common enough.
2460
logger.warning("SO_BINDTODEVICE not found, trying 25")
2461
SO_BINDTODEVICE = 25
2462
try:
2463
self.socket.setsockopt(
2464
socket.SOL_SOCKET, SO_BINDTODEVICE,
2465
(self.interface + "\0").encode("utf-8"))
2466
except socket.error as error:
2467
if error.errno == errno.EPERM:
2468
logger.error("No permission to bind to"
2469
" interface %s", self.interface)
2470
elif error.errno == errno.ENOPROTOOPT:
2471
logger.error("SO_BINDTODEVICE not available;"
2472
" cannot bind to interface %s",
2473
self.interface)
2474
elif error.errno == errno.ENODEV:
2475
logger.error("Interface %s does not exist,"
2476
" cannot bind", self.interface)
2477
else:
2478
raise
1181
logger.error(u"SO_BINDTODEVICE does not exist;"
1182
u" cannot bind to interface %s",
1183
self.interface)
1184
else:
1185
try:
1186
self.socket.setsockopt(socket.SOL_SOCKET,
1187
SO_BINDTODEVICE,
1188
str(self.interface
1189
+ u'\0'))
1190
except socket.error, error:
1191
if error[0] == errno.EPERM:
1192
logger.error(u"No permission to"
1193
u" bind to interface %s",
1194
self.interface)
1195
elif error[0] == errno.ENOPROTOOPT:
1196
logger.error(u"SO_BINDTODEVICE not available;"
1197
u" cannot bind to interface %s",
1198
self.interface)
1199
else:
1200
raise
2479
1201
# Only bind(2) the socket if we really need to.
2480
1202
if self.server_address[0] or self.server_address[1]:
2481
1203
if not self.server_address[0]:
2482
1204
if self.address_family == socket.AF_INET6:
2483
any_address = "::" # in6addr_any
1205
any_address = u"::" # in6addr_any
2484
1206
else:
2485
any_address = "0.0.0.0" # INADDR_ANY
1207
any_address = socket.INADDR_ANY
2486
1208
self.server_address = (any_address,
2487
1209
self.server_address[1])
2488
1210
elif not self.server_address[1]:
2489
self.server_address = (self.server_address[0], 0)
1211
self.server_address = (self.server_address[0],
1212
0)
2490
1213
# if self.interface:
2491
1214
# self.server_address = (self.server_address[0],
2492
1215
# 0, # port
2504
1227
gnutls_priority GnuTLS priority string
2505
1228
use_dbus: Boolean; to emit D-Bus signals or not
2506
1229
2507
Assumes a GLib.MainLoop event loop.
1230
Assumes a gobject.MainLoop event loop.
2508
1231
"""
2509
2510
1232
def __init__(self, server_address, RequestHandlerClass,
2511
interface=None,
2512
use_ipv6=True,
2513
clients=None,
2514
gnutls_priority=None,
2515
use_dbus=True,
2516
socketfd=None):
1233
interface=None, use_ipv6=True, clients=None,
1234
gnutls_priority=None, use_dbus=True):
2517
1235
self.enabled = False
2518
1236
self.clients = clients
2519
1237
if self.clients is None:
2520
self.clients = {}
1238
self.clients = set()
2521
1239
self.use_dbus = use_dbus
2522
1240
self.gnutls_priority = gnutls_priority
2523
1241
IPv6_TCPServer.__init__(self, server_address,
2524
1242
RequestHandlerClass,
2525
1243
interface = interface,
2526
use_ipv6 = use_ipv6,
2527
socketfd = socketfd)
2528
1244
use_ipv6 = use_ipv6)
2529
1245
def server_activate(self):
2530
1246
if self.enabled:
2531
1247
return socketserver.TCPServer.server_activate(self)
2532
2533
1248
def enable(self):
2534
1249
self.enabled = True
2535
2536
def add_pipe(self, parent_pipe, proc):
1250
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
2537
1251
# Call "handle_ipc" for both data and EOF events
2538
GLib.io_add_watch(
2539
parent_pipe.fileno(),
2540
GLib.IO_IN | GLib.IO_HUP,
2541
functools.partial(self.handle_ipc,
2542
parent_pipe = parent_pipe,
2543
proc = proc))
2544
2545
def handle_ipc(self, source, condition,
2546
parent_pipe=None,
2547
proc = None,
2548
client_object=None):
2549
# error, or the other end of multiprocessing.Pipe has closed
2550
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2551
# Wait for other process to exit
2552
proc.join()
2553
return False
2554
2555
# Read a request from the child
2556
request = parent_pipe.recv()
2557
command = request[0]
2558
2559
if command == 'init':
2560
fpr = request[1]
2561
address = request[2]
2562
2563
for c in self.clients.values():
2564
if c.fingerprint == fpr:
2565
client = c
2566
break
2567
else:
2568
logger.info("Client not found for fingerprint: %s, ad"
2569
"dress: %s", fpr, address)
2570
if self.use_dbus:
2571
# Emit D-Bus signal
2572
mandos_dbus_service.ClientNotFound(fpr,
2573
address[0])
2574
parent_pipe.send(False)
2575
return False
2576
2577
GLib.io_add_watch(
2578
parent_pipe.fileno(),
2579
GLib.IO_IN | GLib.IO_HUP,
2580
functools.partial(self.handle_ipc,
2581
parent_pipe = parent_pipe,
2582
proc = proc,
2583
client_object = client))
2584
parent_pipe.send(True)
2585
# remove the old hook in favor of the new above hook on
2586
# same fileno
2587
return False
2588
if command == 'funcall':
2589
funcname = request[1]
2590
args = request[2]
2591
kwargs = request[3]
2592
2593
parent_pipe.send(('data', getattr(client_object,
2594
funcname)(*args,
2595
**kwargs)))
2596
2597
if command == 'getattr':
2598
attrname = request[1]
2599
if isinstance(client_object.__getattribute__(attrname),
2600
collections.Callable):
2601
parent_pipe.send(('function', ))
2602
else:
2603
parent_pipe.send((
2604
'data', client_object.__getattribute__(attrname)))
2605
2606
if command == 'setattr':
2607
attrname = request[1]
2608
value = request[2]
2609
setattr(client_object, attrname, value)
2610
1252
gobject.io_add_watch(child_pipe_fd,
1253
gobject.IO_IN | gobject.IO_HUP,
1254
functools.partial(self.handle_ipc,
1255
reply_fd
1256
=parent_pipe_fd))
1257
def handle_ipc(self, source, condition, reply_fd=None,
1258
file_objects={}):
1259
condition_names = {
1260
gobject.IO_IN: u"IN", # There is data to read.
1261
gobject.IO_OUT: u"OUT", # Data can be written (without
1262
# blocking).
1263
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1264
gobject.IO_ERR: u"ERR", # Error condition.
1265
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1266
# broken, usually for pipes and
1267
# sockets).
1268
}
1269
conditions_string = ' | '.join(name
1270
for cond, name in
1271
condition_names.iteritems()
1272
if cond & condition)
1273
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1274
conditions_string)
1275
1276
# Turn the pipe file descriptors into Python file objects
1277
if source not in file_objects:
1278
file_objects[source] = os.fdopen(source, u"r", 1)
1279
if reply_fd not in file_objects:
1280
file_objects[reply_fd] = os.fdopen(reply_fd, u"w", 0)
1281
1282
# Read a line from the file object
1283
cmdline = file_objects[source].readline()
1284
if not cmdline: # Empty line means end of file
1285
# close the IPC pipes
1286
file_objects[source].close()
1287
del file_objects[source]
1288
file_objects[reply_fd].close()
1289
del file_objects[reply_fd]
1290
1291
# Stop calling this function
1292
return False
1293
1294
logger.debug(u"IPC command: %r", cmdline)
1295
1296
# Parse and act on command
1297
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1298
1299
if cmd == u"NOTFOUND":
1300
fpr, address = args.split(None, 1)
1301
logger.warning(u"Client not found for fingerprint: %s, ad"
1302
u"dress: %s", fpr, address)
1303
if self.use_dbus:
1304
# Emit D-Bus signal
1305
mandos_dbus_service.ClientNotFound(fpr, address)
1306
elif cmd == u"DISABLED":
1307
for client in self.clients:
1308
if client.name == args:
1309
logger.warning(u"Client %s is disabled", args)
1310
if self.use_dbus:
1311
# Emit D-Bus signal
1312
client.Rejected()
1313
break
1314
else:
1315
logger.error(u"Unknown client %s is disabled", args)
1316
elif cmd == u"SENDING":
1317
for client in self.clients:
1318
if client.name == args:
1319
logger.info(u"Sending secret to %s", client.name)
1320
client.checked_ok()
1321
if self.use_dbus:
1322
# Emit D-Bus signal
1323
client.GotSecret()
1324
break
1325
else:
1326
logger.error(u"Sending secret to unknown client %s",
1327
args)
1328
elif cmd == u"GETATTR":
1329
attr_name, fpr = args.split(None, 1)
1330
for client in self.clients:
1331
if client.fingerprint == fpr:
1332
attr_value = getattr(client, attr_name, None)
1333
logger.debug("IPC reply: %r", attr_value)
1334
pickle.dump(attr_value, file_objects[reply_fd])
1335
break
1336
else:
1337
logger.error(u"Client %s on address %s requesting "
1338
u"attribute %s not found", fpr, address,
1339
attr_name)
1340
pickle.dump(None, file_objects[reply_fd])
1341
else:
1342
logger.error(u"Unknown IPC command: %r", cmdline)
1343
1344
# Keep calling this function
2611
1345
return True
2612
1346
2613
1347
2614
def rfc3339_duration_to_delta(duration):
2615
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2616
2617
>>> rfc3339_duration_to_delta("P7D")
2618
datetime.timedelta(7)
2619
>>> rfc3339_duration_to_delta("PT60S")
2620
datetime.timedelta(0, 60)
2621
>>> rfc3339_duration_to_delta("PT60M")
2622
datetime.timedelta(0, 3600)
2623
>>> rfc3339_duration_to_delta("PT24H")
2624
datetime.timedelta(1)
2625
>>> rfc3339_duration_to_delta("P1W")
2626
datetime.timedelta(7)
2627
>>> rfc3339_duration_to_delta("PT5M30S")
2628
datetime.timedelta(0, 330)
2629
>>> rfc3339_duration_to_delta("P1DT3M20S")
2630
datetime.timedelta(1, 200)
2631
"""
2632
2633
# Parsing an RFC 3339 duration with regular expressions is not
2634
# possible - there would have to be multiple places for the same
2635
# values, like seconds. The current code, while more esoteric, is
2636
# cleaner without depending on a parsing library. If Python had a
2637
# built-in library for parsing we would use it, but we'd like to
2638
# avoid excessive use of external libraries.
2639
2640
# New type for defining tokens, syntax, and semantics all-in-one
2641
Token = collections.namedtuple("Token", (
2642
"regexp", # To match token; if "value" is not None, must have
2643
# a "group" containing digits
2644
"value", # datetime.timedelta or None
2645
"followers")) # Tokens valid after this token
2646
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2647
# the "duration" ABNF definition in RFC 3339, Appendix A.
2648
token_end = Token(re.compile(r"$"), None, frozenset())
2649
token_second = Token(re.compile(r"(\d+)S"),
2650
datetime.timedelta(seconds=1),
2651
frozenset((token_end, )))
2652
token_minute = Token(re.compile(r"(\d+)M"),
2653
datetime.timedelta(minutes=1),
2654
frozenset((token_second, token_end)))
2655
token_hour = Token(re.compile(r"(\d+)H"),
2656
datetime.timedelta(hours=1),
2657
frozenset((token_minute, token_end)))
2658
token_time = Token(re.compile(r"T"),
2659
None,
2660
frozenset((token_hour, token_minute,
2661
token_second)))
2662
token_day = Token(re.compile(r"(\d+)D"),
2663
datetime.timedelta(days=1),
2664
frozenset((token_time, token_end)))
2665
token_month = Token(re.compile(r"(\d+)M"),
2666
datetime.timedelta(weeks=4),
2667
frozenset((token_day, token_end)))
2668
token_year = Token(re.compile(r"(\d+)Y"),
2669
datetime.timedelta(weeks=52),
2670
frozenset((token_month, token_end)))
2671
token_week = Token(re.compile(r"(\d+)W"),
2672
datetime.timedelta(weeks=1),
2673
frozenset((token_end, )))
2674
token_duration = Token(re.compile(r"P"), None,
2675
frozenset((token_year, token_month,
2676
token_day, token_time,
2677
token_week)))
2678
# Define starting values
2679
value = datetime.timedelta() # Value so far
2680
found_token = None
2681
followers = frozenset((token_duration, )) # Following valid tokens
2682
s = duration # String left to parse
2683
# Loop until end token is found
2684
while found_token is not token_end:
2685
# Search for any currently valid tokens
2686
for token in followers:
2687
match = token.regexp.match(s)
2688
if match is not None:
2689
# Token found
2690
if token.value is not None:
2691
# Value found, parse digits
2692
factor = int(match.group(1), 10)
2693
# Add to value so far
2694
value += factor * token.value
2695
# Strip token from string
2696
s = token.regexp.sub("", s, 1)
2697
# Go to found token
2698
found_token = token
2699
# Set valid next tokens
2700
followers = found_token.followers
2701
break
2702
else:
2703
# No currently valid tokens were found
2704
raise ValueError("Invalid RFC 3339 duration: {!r}"
2705
.format(duration))
2706
# End token found
2707
return value
2708
2709
2710
1348
def string_to_delta(interval):
2711
1349
"""Parse a string and return a datetime.timedelta
2712
1350
2713
>>> string_to_delta('7d')
1351
>>> string_to_delta(u'7d')
2714
1352
datetime.timedelta(7)
2715
>>> string_to_delta('60s')
1353
>>> string_to_delta(u'60s')
2716
1354
datetime.timedelta(0, 60)
2717
>>> string_to_delta('60m')
1355
>>> string_to_delta(u'60m')
2718
1356
datetime.timedelta(0, 3600)
2719
>>> string_to_delta('24h')
1357
>>> string_to_delta(u'24h')
2720
1358
datetime.timedelta(1)
2721
>>> string_to_delta('1w')
1359
>>> string_to_delta(u'1w')
2722
1360
datetime.timedelta(7)
2723
>>> string_to_delta('5m 30s')
1361
>>> string_to_delta(u'5m 30s')
2724
1362
datetime.timedelta(0, 330)
2725
1363
"""
2726
2727
try:
2728
return rfc3339_duration_to_delta(interval)
2729
except ValueError:
2730
pass
2731
2732
1364
timevalue = datetime.timedelta(0)
2733
1365
for s in interval.split():
2734
1366
try:
2735
suffix = s[-1]
1367
suffix = unicode(s[-1])
2736
1368
value = int(s[:-1])
2737
if suffix == "d":
1369
if suffix == u"d":
2738
1370
delta = datetime.timedelta(value)
2739
elif suffix == "s":
1371
elif suffix == u"s":
2740
1372
delta = datetime.timedelta(0, value)
2741
elif suffix == "m":
1373
elif suffix == u"m":
2742
1374
delta = datetime.timedelta(0, 0, 0, 0, value)
2743
elif suffix == "h":
1375
elif suffix == u"h":
2744
1376
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2745
elif suffix == "w":
1377
elif suffix == u"w":
2746
1378
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2747
1379
else:
2748
raise ValueError("Unknown suffix {!r}".format(suffix))
2749
except IndexError as e:
2750
raise ValueError(*(e.args))
1380
raise ValueError(u"Unknown suffix %r" % suffix)
1381
except (ValueError, IndexError), e:
1382
raise ValueError(e.message)
2751
1383
timevalue += delta
2752
1384
return timevalue
2753
1385
2754
1386
1387
def if_nametoindex(interface):
1388
"""Call the C function if_nametoindex(), or equivalent
1389
1390
Note: This function cannot accept a unicode string."""
1391
global if_nametoindex
1392
try:
1393
if_nametoindex = (ctypes.cdll.LoadLibrary
1394
(ctypes.util.find_library(u"c"))
1395
.if_nametoindex)
1396
except (OSError, AttributeError):
1397
logger.warning(u"Doing if_nametoindex the hard way")
1398
def if_nametoindex(interface):
1399
"Get an interface index the hard way, i.e. using fcntl()"
1400
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1401
with contextlib.closing(socket.socket()) as s:
1402
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1403
struct.pack(str(u"16s16x"),
1404
interface))
1405
interface_index = struct.unpack(str(u"I"),
1406
ifreq[16:20])[0]
1407
return interface_index
1408
return if_nametoindex(interface)
1409
1410
2755
1411
def daemon(nochdir = False, noclose = False):
2756
1412
"""See daemon(3). Standard BSD Unix function.
2757
1413
2760
1416
sys.exit()
2761
1417
os.setsid()
2762
1418
if not nochdir:
2763
os.chdir("/")
1419
os.chdir(u"/")
2764
1420
if os.fork():
2765
1421
sys.exit()
2766
1422
if not noclose:
2767
1423
# Close all standard open file descriptors
2768
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1424
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2769
1425
if not stat.S_ISCHR(os.fstat(null).st_mode):
2770
1426
raise OSError(errno.ENODEV,
2771
"{} not a character device"
2772
.format(os.devnull))
1427
u"%s not a character device"
1428
% os.path.devnull)
2773
1429
os.dup2(null, sys.stdin.fileno())
2774
1430
os.dup2(null, sys.stdout.fileno())
2775
1431
os.dup2(null, sys.stderr.fileno())
2782
1438
##################################################################
2783
1439
# Parsing of options, both command line and config file
2784
1440
2785
parser = argparse.ArgumentParser()
2786
parser.add_argument("-v", "--version", action="version",
2787
version = "%(prog)s {}".format(version),
2788
help="show version number and exit")
2789
parser.add_argument("-i", "--interface", metavar="IF",
2790
help="Bind to interface IF")
2791
parser.add_argument("-a", "--address",
2792
help="Address to listen for requests on")
2793
parser.add_argument("-p", "--port", type=int,
2794
help="Port number to receive requests on")
2795
parser.add_argument("--check", action="store_true",
2796
help="Run self-test")
2797
parser.add_argument("--debug", action="store_true",
2798
help="Debug mode; run in foreground and log"
2799
" to terminal", default=None)
2800
parser.add_argument("--debuglevel", metavar="LEVEL",
2801
help="Debug level for stdout output")
2802
parser.add_argument("--priority", help="GnuTLS"
2803
" priority string (see GnuTLS documentation)")
2804
parser.add_argument("--servicename",
2805
metavar="NAME", help="Zeroconf service name")
2806
parser.add_argument("--configdir",
2807
default="/etc/mandos", metavar="DIR",
2808
help="Directory to search for configuration"
2809
" files")
2810
parser.add_argument("--no-dbus", action="store_false",
2811
dest="use_dbus", help="Do not provide D-Bus"
2812
" system bus interface", default=None)
2813
parser.add_argument("--no-ipv6", action="store_false",
2814
dest="use_ipv6", help="Do not use IPv6",
2815
default=None)
2816
parser.add_argument("--no-restore", action="store_false",
2817
dest="restore", help="Do not restore stored"
2818
" state", default=None)
2819
parser.add_argument("--socket", type=int,
2820
help="Specify a file descriptor to a network"
2821
" socket to use instead of creating one")
2822
parser.add_argument("--statedir", metavar="DIR",
2823
help="Directory to save/restore state in")
2824
parser.add_argument("--foreground", action="store_true",
2825
help="Run in foreground", default=None)
2826
parser.add_argument("--no-zeroconf", action="store_false",
2827
dest="zeroconf", help="Do not use Zeroconf",
2828
default=None)
2829
2830
options = parser.parse_args()
1441
parser = optparse.OptionParser(version = "%%prog %s" % version)
1442
parser.add_option("-i", u"--interface", type=u"string",
1443
metavar="IF", help=u"Bind to interface IF")
1444
parser.add_option("-a", u"--address", type=u"string",
1445
help=u"Address to listen for requests on")
1446
parser.add_option("-p", u"--port", type=u"int",
1447
help=u"Port number to receive requests on")
1448
parser.add_option("--check", action=u"store_true",
1449
help=u"Run self-test")
1450
parser.add_option("--debug", action=u"store_true",
1451
help=u"Debug mode; run in foreground and log to"
1452
u" terminal")
1453
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1454
u" priority string (see GnuTLS documentation)")
1455
parser.add_option("--servicename", type=u"string",
1456
metavar=u"NAME", help=u"Zeroconf service name")
1457
parser.add_option("--configdir", type=u"string",
1458
default=u"/etc/mandos", metavar=u"DIR",
1459
help=u"Directory to search for configuration"
1460
u" files")
1461
parser.add_option("--no-dbus", action=u"store_false",
1462
dest=u"use_dbus", help=u"Do not provide D-Bus"
1463
u" system bus interface")
1464
parser.add_option("--no-ipv6", action=u"store_false",
1465
dest=u"use_ipv6", help=u"Do not use IPv6")
1466
options = parser.parse_args()[0]
2831
1467
2832
1468
if options.check:
2833
1469
import doctest
2834
fail_count, test_count = doctest.testmod()
2835
sys.exit(os.EX_OK if fail_count == 0 else 1)
1470
doctest.testmod()
1471
sys.exit()
2836
1472
2837
1473
# Default values for config file for server-global settings
2838
server_defaults = { "interface": "",
2839
"address": "",
2840
"port": "",
2841
"debug": "False",
2842
"priority":
2843
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2844
":+SIGN-DSA-SHA256",
2845
"servicename": "Mandos",
2846
"use_dbus": "True",
2847
"use_ipv6": "True",
2848
"debuglevel": "",
2849
"restore": "True",
2850
"socket": "",
2851
"statedir": "/var/lib/mandos",
2852
"foreground": "False",
2853
"zeroconf": "True",
2854
}
1474
server_defaults = { u"interface": u"",
1475
u"address": u"",
1476
u"port": u"",
1477
u"debug": u"False",
1478
u"priority":
1479
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1480
u"servicename": u"Mandos",
1481
u"use_dbus": u"True",
1482
u"use_ipv6": u"True",
1483
}
2855
1484
2856
1485
# Parse config file for server-global settings
2857
1486
server_config = configparser.SafeConfigParser(server_defaults)
2858
1487
del server_defaults
2859
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1488
server_config.read(os.path.join(options.configdir,
1489
u"mandos.conf"))
2860
1490
# Convert the SafeConfigParser object to a dict
2861
1491
server_settings = server_config.defaults()
2862
1492
# Use the appropriate methods on the non-string config options
2863
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2864
server_settings[option] = server_config.getboolean("DEFAULT",
1493
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1494
server_settings[option] = server_config.getboolean(u"DEFAULT",
2865
1495
option)
2866
1496
if server_settings["port"]:
2867
server_settings["port"] = server_config.getint("DEFAULT",
2868
"port")
2869
if server_settings["socket"]:
2870
server_settings["socket"] = server_config.getint("DEFAULT",
2871
"socket")
2872
# Later, stdin will, and stdout and stderr might, be dup'ed
2873
# over with an opened os.devnull. But we don't want this to
2874
# happen with a supplied network socket.
2875
if 0 <= server_settings["socket"] <= 2:
2876
server_settings["socket"] = os.dup(server_settings
2877
["socket"])
1497
server_settings["port"] = server_config.getint(u"DEFAULT",
1498
u"port")
2878
1499
del server_config
2879
1500
2880
1501
# Override the settings from the config file with command line
2881
1502
# options, if set.
2882
for option in ("interface", "address", "port", "debug",
2883
"priority", "servicename", "configdir", "use_dbus",
2884
"use_ipv6", "debuglevel", "restore", "statedir",
2885
"socket", "foreground", "zeroconf"):
1503
for option in (u"interface", u"address", u"port", u"debug",
1504
u"priority", u"servicename", u"configdir",
1505
u"use_dbus", u"use_ipv6"):
2886
1506
value = getattr(options, option)
2887
1507
if value is not None:
2888
1508
server_settings[option] = value
2889
1509
del options
2890
1510
# Force all strings to be unicode
2891
1511
for option in server_settings.keys():
2892
if isinstance(server_settings[option], bytes):
2893
server_settings[option] = (server_settings[option]
2894
.decode("utf-8"))
2895
# Force all boolean options to be boolean
2896
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2897
"foreground", "zeroconf"):
2898
server_settings[option] = bool(server_settings[option])
2899
# Debug implies foreground
2900
if server_settings["debug"]:
2901
server_settings["foreground"] = True
1512
if type(server_settings[option]) is str:
1513
server_settings[option] = unicode(server_settings[option])
2902
1514
# Now we have our good server settings in "server_settings"
2903
1515
2904
1516
##################################################################
2905
1517
2906
if (not server_settings["zeroconf"]
2907
and not (server_settings["port"]
2908
or server_settings["socket"] != "")):
2909
parser.error("Needs port or socket to work without Zeroconf")
2910
2911
1518
# For convenience
2912
debug = server_settings["debug"]
2913
debuglevel = server_settings["debuglevel"]
2914
use_dbus = server_settings["use_dbus"]
2915
use_ipv6 = server_settings["use_ipv6"]
2916
stored_state_path = os.path.join(server_settings["statedir"],
2917
stored_state_file)
2918
foreground = server_settings["foreground"]
2919
zeroconf = server_settings["zeroconf"]
2920
2921
if debug:
2922
initlogger(debug, logging.DEBUG)
2923
else:
2924
if not debuglevel:
2925
initlogger(debug)
2926
else:
2927
level = getattr(logging, debuglevel.upper())
2928
initlogger(debug, level)
2929
2930
if server_settings["servicename"] != "Mandos":
2931
syslogger.setFormatter(
2932
logging.Formatter('Mandos ({}) [%(process)d]:'
2933
' %(levelname)s: %(message)s'.format(
2934
server_settings["servicename"])))
1519
debug = server_settings[u"debug"]
1520
use_dbus = server_settings[u"use_dbus"]
1521
use_ipv6 = server_settings[u"use_ipv6"]
1522
1523
if not debug:
1524
syslogger.setLevel(logging.WARNING)
1525
console.setLevel(logging.WARNING)
1526
1527
if server_settings[u"servicename"] != u"Mandos":
1528
syslogger.setFormatter(logging.Formatter
1529
(u'Mandos (%s) [%%(process)d]:'
1530
u' %%(levelname)s: %%(message)s'
1531
% server_settings[u"servicename"]))
2935
1532
2936
1533
# Parse config file with clients
2937
client_config = configparser.SafeConfigParser(Client
2938
.client_defaults)
2939
client_config.read(os.path.join(server_settings["configdir"],
2940
"clients.conf"))
1534
client_defaults = { u"timeout": u"1h",
1535
u"interval": u"5m",
1536
u"checker": u"fping -q -- %%(host)s",
1537
u"host": u"",
1538
}
1539
client_config = configparser.SafeConfigParser(client_defaults)
1540
client_config.read(os.path.join(server_settings[u"configdir"],
1541
u"clients.conf"))
2941
1542
2942
1543
global mandos_dbus_service
2943
1544
mandos_dbus_service = None
2944
1545
2945
socketfd = None
2946
if server_settings["socket"] != "":
2947
socketfd = server_settings["socket"]
2948
tcp_server = MandosServer(
2949
(server_settings["address"], server_settings["port"]),
2950
ClientHandler,
2951
interface=(server_settings["interface"] or None),
2952
use_ipv6=use_ipv6,
2953
gnutls_priority=server_settings["priority"],
2954
use_dbus=use_dbus,
2955
socketfd=socketfd)
2956
if not foreground:
2957
pidfilename = "/run/mandos.pid"
2958
if not os.path.isdir("/run/."):
2959
pidfilename = "/var/run/mandos.pid"
2960
pidfile = None
2961
try:
2962
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2963
except IOError as e:
2964
logger.error("Could not open file %r", pidfilename,
2965
exc_info=e)
1546
tcp_server = MandosServer((server_settings[u"address"],
1547
server_settings[u"port"]),
1548
ClientHandler,
1549
interface=server_settings[u"interface"],
1550
use_ipv6=use_ipv6,
1551
gnutls_priority=
1552
server_settings[u"priority"],
1553
use_dbus=use_dbus)
1554
pidfilename = u"/var/run/mandos.pid"
1555
try:
1556
pidfile = open(pidfilename, u"w")
1557
except IOError:
1558
logger.error(u"Could not open file %r", pidfilename)
2966
1559
2967
for name, group in (("_mandos", "_mandos"),
2968
("mandos", "mandos"),
2969
("nobody", "nogroup")):
1560
try:
1561
uid = pwd.getpwnam(u"_mandos").pw_uid
1562
gid = pwd.getpwnam(u"_mandos").pw_gid
1563
except KeyError:
2970
1564
try:
2971
uid = pwd.getpwnam(name).pw_uid
2972
gid = pwd.getpwnam(group).pw_gid
2973
break
1565
uid = pwd.getpwnam(u"mandos").pw_uid
1566
gid = pwd.getpwnam(u"mandos").pw_gid
2974
1567
except KeyError:
2975
continue
2976
else:
2977
uid = 65534
2978
gid = 65534
1568
try:
1569
uid = pwd.getpwnam(u"nobody").pw_uid
1570
gid = pwd.getpwnam(u"nobody").pw_gid
1571
except KeyError:
1572
uid = 65534
1573
gid = 65534
2979
1574
try:
2980
1575
os.setgid(gid)
2981
1576
os.setuid(uid)
2982
if debug:
2983
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2984
gid))
2985
except OSError as error:
2986
logger.warning("Failed to setuid/setgid to {}:{}: {}"
2987
.format(uid, gid, os.strerror(error.errno)))
2988
if error.errno != errno.EPERM:
2989
raise
1577
except OSError, error:
1578
if error[0] != errno.EPERM:
1579
raise error
2990
1580
1581
# Enable all possible GnuTLS debugging
2991
1582
if debug:
2992
# Enable all possible GnuTLS debugging
2993
2994
1583
# "Use a log level over 10 to enable all debugging options."
2995
1584
# - GnuTLS manual
2996
gnutls.global_set_log_level(11)
1585
gnutls.library.functions.gnutls_global_set_log_level(11)
2997
1586
2998
@gnutls.log_func
1587
@gnutls.library.types.gnutls_log_func
2999
1588
def debug_gnutls(level, string):
3000
logger.debug("GnuTLS: %s", string[:-1])
3001
3002
gnutls.global_set_log_function(debug_gnutls)
3003
3004
# Redirect stdin so all checkers get /dev/null
3005
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3006
os.dup2(null, sys.stdin.fileno())
3007
if null > 2:
3008
os.close(null)
3009
3010
# Need to fork before connecting to D-Bus
3011
if not foreground:
3012
# Close all input and output, do double fork, etc.
3013
daemon()
3014
3015
# multiprocessing will use threads, so before we use GLib we need
3016
# to inform GLib that threads will be used.
3017
GLib.threads_init()
1589
logger.debug(u"GnuTLS: %s", string[:-1])
1590
1591
(gnutls.library.functions
1592
.gnutls_global_set_log_function(debug_gnutls))
3018
1593
3019
1594
global main_loop
3020
1595
# From the Avahi example code
3021
DBusGMainLoop(set_as_default=True)
3022
main_loop = GLib.MainLoop()
1596
DBusGMainLoop(set_as_default=True )
1597
main_loop = gobject.MainLoop()
3023
1598
bus = dbus.SystemBus()
3024
1599
# End of Avahi example code
3025
1600
if use_dbus:
3026
1601
try:
3027
bus_name = dbus.service.BusName("se.recompile.Mandos",
3028
bus,
3029
do_not_queue=True)
3030
old_bus_name = dbus.service.BusName(
3031
"se.bsnet.fukt.Mandos", bus,
3032
do_not_queue=True)
3033
except dbus.exceptions.DBusException as e:
3034
logger.error("Disabling D-Bus:", exc_info=e)
1602
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1603
bus, do_not_queue=True)
1604
except dbus.exceptions.NameExistsException, e:
1605
logger.error(unicode(e) + u", disabling D-Bus")
3035
1606
use_dbus = False
3036
server_settings["use_dbus"] = False
1607
server_settings[u"use_dbus"] = False
3037
1608
tcp_server.use_dbus = False
3038
if zeroconf:
3039
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3040
service = AvahiServiceToSyslog(
3041
name = server_settings["servicename"],
3042
servicetype = "_mandos._tcp",
3043
protocol = protocol,
3044
bus = bus)
3045
if server_settings["interface"]:
3046
service.interface = if_nametoindex(
3047
server_settings["interface"].encode("utf-8"))
3048
3049
global multiprocessing_manager
3050
multiprocessing_manager = multiprocessing.Manager()
1609
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1610
service = AvahiService(name = server_settings[u"servicename"],
1611
servicetype = u"_mandos._tcp",
1612
protocol = protocol, bus = bus)
1613
if server_settings["interface"]:
1614
service.interface = (if_nametoindex
1615
(str(server_settings[u"interface"])))
3051
1616
3052
1617
client_class = Client
3053
1618
if use_dbus:
3054
1619
client_class = functools.partial(ClientDBus, bus = bus)
3055
3056
client_settings = Client.config_parser(client_config)
3057
old_client_settings = {}
3058
clients_data = {}
3059
3060
# This is used to redirect stdout and stderr for checker processes
3061
global wnull
3062
wnull = open(os.devnull, "w") # A writable /dev/null
3063
# Only used if server is running in foreground but not in debug
3064
# mode
3065
if debug or not foreground:
3066
wnull.close()
3067
3068
# Get client data and settings from last running state.
3069
if server_settings["restore"]:
3070
try:
3071
with open(stored_state_path, "rb") as stored_state:
3072
if sys.version_info.major == 2:
3073
clients_data, old_client_settings = pickle.load(
3074
stored_state)
3075
else:
3076
bytes_clients_data, bytes_old_client_settings = (
3077
pickle.load(stored_state, encoding = "bytes"))
3078
### Fix bytes to strings
3079
## clients_data
3080
# .keys()
3081
clients_data = { (key.decode("utf-8")
3082
if isinstance(key, bytes)
3083
else key): value
3084
for key, value in
3085
bytes_clients_data.items() }
3086
del bytes_clients_data
3087
for key in clients_data:
3088
value = { (k.decode("utf-8")
3089
if isinstance(k, bytes) else k): v
3090
for k, v in
3091
clients_data[key].items() }
3092
clients_data[key] = value
3093
# .client_structure
3094
value["client_structure"] = [
3095
(s.decode("utf-8")
3096
if isinstance(s, bytes)
3097
else s) for s in
3098
value["client_structure"] ]
3099
# .name & .host
3100
for k in ("name", "host"):
3101
if isinstance(value[k], bytes):
3102
value[k] = value[k].decode("utf-8")
3103
## old_client_settings
3104
# .keys()
3105
old_client_settings = {
3106
(key.decode("utf-8")
3107
if isinstance(key, bytes)
3108
else key): value
3109
for key, value in
3110
bytes_old_client_settings.items() }
3111
del bytes_old_client_settings
3112
# .host
3113
for value in old_client_settings.values():
3114
if isinstance(value["host"], bytes):
3115
value["host"] = (value["host"]
3116
.decode("utf-8"))
3117
os.remove(stored_state_path)
3118
except IOError as e:
3119
if e.errno == errno.ENOENT:
3120
logger.warning("Could not load persistent state:"
3121
" {}".format(os.strerror(e.errno)))
3122
else:
3123
logger.critical("Could not load persistent state:",
3124
exc_info=e)
3125
raise
3126
except EOFError as e:
3127
logger.warning("Could not load persistent state: "
3128
"EOFError:",
3129
exc_info=e)
3130
3131
with PGPEngine() as pgp:
3132
for client_name, client in clients_data.items():
3133
# Skip removed clients
3134
if client_name not in client_settings:
3135
continue
3136
3137
# Decide which value to use after restoring saved state.
3138
# We have three different values: Old config file,
3139
# new config file, and saved state.
3140
# New config value takes precedence if it differs from old
3141
# config value, otherwise use saved state.
3142
for name, value in client_settings[client_name].items():
3143
try:
3144
# For each value in new config, check if it
3145
# differs from the old config value (Except for
3146
# the "secret" attribute)
3147
if (name != "secret"
3148
and (value !=
3149
old_client_settings[client_name][name])):
3150
client[name] = value
3151
except KeyError:
3152
pass
3153
3154
# Clients who has passed its expire date can still be
3155
# enabled if its last checker was successful. A Client
3156
# whose checker succeeded before we stored its state is
3157
# assumed to have successfully run all checkers during
3158
# downtime.
3159
if client["enabled"]:
3160
if datetime.datetime.utcnow() >= client["expires"]:
3161
if not client["last_checked_ok"]:
3162
logger.warning(
3163
"disabling client {} - Client never "
3164
"performed a successful checker".format(
3165
client_name))
3166
client["enabled"] = False
3167
elif client["last_checker_status"] != 0:
3168
logger.warning(
3169
"disabling client {} - Client last"
3170
" checker failed with error code"
3171
" {}".format(
3172
client_name,
3173
client["last_checker_status"]))
3174
client["enabled"] = False
3175
else:
3176
client["expires"] = (
3177
datetime.datetime.utcnow()
3178
+ client["timeout"])
3179
logger.debug("Last checker succeeded,"
3180
" keeping {} enabled".format(
3181
client_name))
3182
try:
3183
client["secret"] = pgp.decrypt(
3184
client["encrypted_secret"],
3185
client_settings[client_name]["secret"])
3186
except PGPError:
3187
# If decryption fails, we use secret from new settings
3188
logger.debug("Failed to decrypt {} old secret".format(
3189
client_name))
3190
client["secret"] = (client_settings[client_name]
3191
["secret"])
3192
3193
# Add/remove clients based on new changes made to config
3194
for client_name in (set(old_client_settings)
3195
- set(client_settings)):
3196
del clients_data[client_name]
3197
for client_name in (set(client_settings)
3198
- set(old_client_settings)):
3199
clients_data[client_name] = client_settings[client_name]
3200
3201
# Create all client objects
3202
for client_name, client in clients_data.items():
3203
tcp_server.clients[client_name] = client_class(
3204
name = client_name,
3205
settings = client,
3206
server_settings = server_settings)
3207
1620
tcp_server.clients.update(set(
1621
client_class(name = section,
1622
config= dict(client_config.items(section)))
1623
for section in client_config.sections()))
3208
1624
if not tcp_server.clients:
3209
logger.warning("No clients defined")
3210
3211
if not foreground:
3212
if pidfile is not None:
1625
logger.warning(u"No clients defined")
1626
1627
if debug:
1628
# Redirect stdin so all checkers get /dev/null
1629
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1630
os.dup2(null, sys.stdin.fileno())
1631
if null > 2:
1632
os.close(null)
1633
else:
1634
# No console logging
1635
logger.removeHandler(console)
1636
# Close all input and output, do double fork, etc.
1637
daemon()
1638
1639
try:
1640
with pidfile:
3213
1641
pid = os.getpid()
3214
try:
3215
with pidfile:
3216
print(pid, file=pidfile)
3217
except IOError:
3218
logger.error("Could not write to file %r with PID %d",
3219
pidfilename, pid)
1642
pidfile.write(str(pid) + "\n")
3220
1643
del pidfile
3221
del pidfilename
1644
except IOError:
1645
logger.error(u"Could not write to file %r with PID %d",
1646
pidfilename, pid)
1647
except NameError:
1648
# "pidfile" was never created
1649
pass
1650
del pidfilename
3222
1651
3223
for termsig in (signal.SIGHUP, signal.SIGTERM):
3224
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3225
lambda: main_loop.quit() and False)
1652
if not debug:
1653
signal.signal(signal.SIGINT, signal.SIG_IGN)
1654
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1655
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3226
1656
3227
1657
if use_dbus:
3228
3229
@alternate_dbus_interfaces(
3230
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3231
class MandosDBusService(DBusObjectWithObjectManager):
1658
class MandosDBusService(dbus.service.Object):
3232
1659
"""A D-Bus proxy object"""
3233
3234
1660
def __init__(self):
3235
dbus.service.Object.__init__(self, bus, "/")
3236
3237
_interface = "se.recompile.Mandos"
3238
3239
@dbus.service.signal(_interface, signature="o")
1661
dbus.service.Object.__init__(self, bus, u"/")
1662
_interface = u"se.bsnet.fukt.Mandos"
1663
1664
@dbus.service.signal(_interface, signature=u"o")
3240
1665
def ClientAdded(self, objpath):
3241
1666
"D-Bus signal"
3242
1667
pass
3243
1668
3244
@dbus.service.signal(_interface, signature="ss")
1669
@dbus.service.signal(_interface, signature=u"ss")
3245
1670
def ClientNotFound(self, fingerprint, address):
3246
1671
"D-Bus signal"
3247
1672
pass
3248
1673
3249
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3250
"true"})
3251
@dbus.service.signal(_interface, signature="os")
1674
@dbus.service.signal(_interface, signature=u"os")
3252
1675
def ClientRemoved(self, objpath, name):
3253
1676
"D-Bus signal"
3254
1677
pass
3255
1678
3256
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3257
"true"})
3258
@dbus.service.method(_interface, out_signature="ao")
1679
@dbus.service.method(_interface, out_signature=u"ao")
3259
1680
def GetAllClients(self):
3260
1681
"D-Bus method"
3261
return dbus.Array(c.dbus_object_path for c in
3262
tcp_server.clients.values())
1682
return dbus.Array(c.dbus_object_path
1683
for c in tcp_server.clients)
3263
1684
3264
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3265
"true"})
3266
1685
@dbus.service.method(_interface,
3267
out_signature="a{oa{sv}}")
1686
out_signature=u"a{oa{sv}}")
3268
1687
def GetAllClientsWithProperties(self):
3269
1688
"D-Bus method"
3270
1689
return dbus.Dictionary(
3271
{ c.dbus_object_path: c.GetAll(
3272
"se.recompile.Mandos.Client")
3273
for c in tcp_server.clients.values() },
3274
signature="oa{sv}")
1690
((c.dbus_object_path, c.GetAll(u""))
1691
for c in tcp_server.clients),
1692
signature=u"oa{sv}")
3275
1693
3276
@dbus.service.method(_interface, in_signature="o")
1694
@dbus.service.method(_interface, in_signature=u"o")
3277
1695
def RemoveClient(self, object_path):
3278
1696
"D-Bus method"
3279
for c in tcp_server.clients.values():
1697
for c in tcp_server.clients:
3280
1698
if c.dbus_object_path == object_path:
3281
del tcp_server.clients[c.name]
1699
tcp_server.clients.remove(c)
3282
1700
c.remove_from_connection()
3283
# Don't signal the disabling
1701
# Don't signal anything except ClientRemoved
3284
1702
c.disable(quiet=True)
3285
# Emit D-Bus signal for removal
3286
self.client_removed_signal(c)
1703
# Emit D-Bus signal
1704
self.ClientRemoved(object_path, c.name)
3287
1705
return
3288
1706
raise KeyError(object_path)
3289
1707
3290
1708
del _interface
3291
3292
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3293
out_signature = "a{oa{sa{sv}}}")
3294
def GetManagedObjects(self):
3295
"""D-Bus method"""
3296
return dbus.Dictionary(
3297
{ client.dbus_object_path:
3298
dbus.Dictionary(
3299
{ interface: client.GetAll(interface)
3300
for interface in
3301
client._get_all_interface_names()})
3302
for client in tcp_server.clients.values()})
3303
3304
def client_added_signal(self, client):
3305
"""Send the new standard signal and the old signal"""
3306
if use_dbus:
3307
# New standard signal
3308
self.InterfacesAdded(
3309
client.dbus_object_path,
3310
dbus.Dictionary(
3311
{ interface: client.GetAll(interface)
3312
for interface in
3313
client._get_all_interface_names()}))
3314
# Old signal
3315
self.ClientAdded(client.dbus_object_path)
3316
3317
def client_removed_signal(self, client):
3318
"""Send the new standard signal and the old signal"""
3319
if use_dbus:
3320
# New standard signal
3321
self.InterfacesRemoved(
3322
client.dbus_object_path,
3323
client._get_all_interface_names())
3324
# Old signal
3325
self.ClientRemoved(client.dbus_object_path,
3326
client.name)
3327
1709
3328
1710
mandos_dbus_service = MandosDBusService()
3329
1711
3330
# Save modules to variables to exempt the modules from being
3331
# unloaded before the function registered with atexit() is run.
3332
mp = multiprocessing
3333
wn = wnull
3334
1712
def cleanup():
3335
1713
"Cleanup function; run on exit"
3336
if zeroconf:
3337
service.cleanup()
3338
3339
mp.active_children()
3340
wn.close()
3341
if not (tcp_server.clients or client_settings):
3342
return
3343
3344
# Store client before exiting. Secrets are encrypted with key
3345
# based on what config file has. If config file is
3346
# removed/edited, old secret will thus be unrecovable.
3347
clients = {}
3348
with PGPEngine() as pgp:
3349
for client in tcp_server.clients.values():
3350
key = client_settings[client.name]["secret"]
3351
client.encrypted_secret = pgp.encrypt(client.secret,
3352
key)
3353
client_dict = {}
3354
3355
# A list of attributes that can not be pickled
3356
# + secret.
3357
exclude = { "bus", "changedstate", "secret",
3358
"checker", "server_settings" }
3359
for name, typ in inspect.getmembers(dbus.service
3360
.Object):
3361
exclude.add(name)
3362
3363
client_dict["encrypted_secret"] = (client
3364
.encrypted_secret)
3365
for attr in client.client_structure:
3366
if attr not in exclude:
3367
client_dict[attr] = getattr(client, attr)
3368
3369
clients[client.name] = client_dict
3370
del client_settings[client.name]["secret"]
3371
3372
try:
3373
with tempfile.NamedTemporaryFile(
3374
mode='wb',
3375
suffix=".pickle",
3376
prefix='clients-',
3377
dir=os.path.dirname(stored_state_path),
3378
delete=False) as stored_state:
3379
pickle.dump((clients, client_settings), stored_state,
3380
protocol = 2)
3381
tempname = stored_state.name
3382
os.rename(tempname, stored_state_path)
3383
except (IOError, OSError) as e:
3384
if not debug:
3385
try:
3386
os.remove(tempname)
3387
except NameError:
3388
pass
3389
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3390
logger.warning("Could not save persistent state: {}"
3391
.format(os.strerror(e.errno)))
3392
else:
3393
logger.warning("Could not save persistent state:",
3394
exc_info=e)
3395
raise
3396
3397
# Delete all clients, and settings from config
1714
service.cleanup()
1715
3398
1716
while tcp_server.clients:
3399
name, client = tcp_server.clients.popitem()
1717
client = tcp_server.clients.pop()
3400
1718
if use_dbus:
3401
1719
client.remove_from_connection()
3402
# Don't signal the disabling
1720
client.disable_hook = None
1721
# Don't signal anything except ClientRemoved
3403
1722
client.disable(quiet=True)
3404
# Emit D-Bus signal for removal
3405
1723
if use_dbus:
3406
mandos_dbus_service.client_removed_signal(client)
3407
client_settings.clear()
1724
# Emit D-Bus signal
1725
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1726
client.name)
3408
1727
3409
1728
atexit.register(cleanup)
3410
1729
3411
for client in tcp_server.clients.values():
1730
for client in tcp_server.clients:
3412
1731
if use_dbus:
3413
# Emit D-Bus signal for adding
3414
mandos_dbus_service.client_added_signal(client)
3415
# Need to initiate checking of clients
3416
if client.enabled:
3417
client.init_checker()
1732
# Emit D-Bus signal
1733
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1734
client.enable()
3418
1735
3419
1736
tcp_server.enable()
3420
1737
tcp_server.server_activate()
3421
1738
3422
1739
# Find out what port we got
3423
if zeroconf:
3424
service.port = tcp_server.socket.getsockname()[1]
1740
service.port = tcp_server.socket.getsockname()[1]
3425
1741
if use_ipv6:
3426
logger.info("Now listening on address %r, port %d,"
3427
" flowinfo %d, scope_id %d",
3428
*tcp_server.socket.getsockname())
1742
logger.info(u"Now listening on address %r, port %d,"
1743
" flowinfo %d, scope_id %d"
1744
% tcp_server.socket.getsockname())
3429
1745
else: # IPv4
3430
logger.info("Now listening on address %r, port %d",
3431
*tcp_server.socket.getsockname())
1746
logger.info(u"Now listening on address %r, port %d"
1747
% tcp_server.socket.getsockname())
3432
1748
3433
1749
#service.interface = tcp_server.socket.getsockname()[3]
3434
1750
3435
1751
try:
3436
if zeroconf:
3437
# From the Avahi example code
3438
try:
3439
service.activate()
3440
except dbus.exceptions.DBusException as error:
3441
logger.critical("D-Bus Exception", exc_info=error)
3442
cleanup()
3443
sys.exit(1)
3444
# End of Avahi example code
3445
3446
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3447
lambda *args, **kwargs:
3448
(tcp_server.handle_request
3449
(*args[2:], **kwargs) or True))
3450
3451
logger.debug("Starting main loop")
1752
# From the Avahi example code
1753
try:
1754
service.activate()
1755
except dbus.exceptions.DBusException, error:
1756
logger.critical(u"DBusException: %s", error)
1757
cleanup()
1758
sys.exit(1)
1759
# End of Avahi example code
1760
1761
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1762
lambda *args, **kwargs:
1763
(tcp_server.handle_request
1764
(*args[2:], **kwargs) or True))
1765
1766
logger.debug(u"Starting main loop")
3452
1767
main_loop.run()
3453
except AvahiError as error:
3454
logger.critical("Avahi Error", exc_info=error)
1768
except AvahiError, error:
1769
logger.critical(u"AvahiError: %s", error)
3455
1770
cleanup()
3456
1771
sys.exit(1)
3457
1772
except KeyboardInterrupt:
3458
1773
if debug:
3459
print("", file=sys.stderr)
3460
logger.debug("Server received KeyboardInterrupt")
3461
logger.debug("Server exiting")
1774
print >> sys.stderr
1775
logger.debug(u"Server received KeyboardInterrupt")
1776
logger.debug(u"Server exiting")
3462
1777
# Must run before the D-Bus bus name gets deregistered
3463
1778
cleanup()
3464
1779
3465
3466
1780
if __name__ == '__main__':
3467
1781
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0