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- Committer: Teddy Hogeborn
- Date: 2016-06-03 16:42:05 UTC
- mto: (237.7.594 trunk)
- mto: This revision was merged to the branch mainline in revision 343.
- Revision ID: teddy@recompile.se-20160603164205-0ekfa0r4pmqccd1w
debian/control: Update Standards-Version to 3.9.8
* debian/control (Standards-Version): Update to 3.9.8
* debian/control (Standards-Version): Update to 3.9.8
- files added:
- 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 © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2008-2016 Teddy Hogeborn
15
# Copyright © 2008-2016 Björn Påhlsson
16
16
#
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
31
# Contact the authors at <mandos@recompile.se>.
32
32
#
33
33
34
from __future__ import division, with_statement, absolute_import
35
36
import SocketServer as socketserver
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
37
46
import socket
38
import optparse
47
import argparse
39
48
import datetime
40
49
import errno
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
50
try:
51
import ConfigParser as configparser
52
except ImportError:
53
import configparser
48
54
import sys
49
55
import re
50
56
import os
59
65
import struct
60
66
import fcntl
61
67
import functools
62
import cPickle as pickle
68
try:
69
import cPickle as pickle
70
except ImportError:
71
import pickle
63
72
import multiprocessing
73
import types
74
import binascii
75
import tempfile
76
import itertools
77
import collections
78
import codecs
64
79
65
80
import dbus
66
81
import dbus.service
67
import gobject
68
import avahi
82
from gi.repository import GLib
69
83
from dbus.mainloop.glib import DBusGMainLoop
70
84
import ctypes
71
85
import ctypes.util
80
94
except ImportError:
81
95
SO_BINDTODEVICE = None
82
96
83
84
version = "1.0.14"
85
86
#logger = logging.getLogger(u'mandos')
87
logger = logging.Logger(u'mandos')
88
syslogger = (logging.handlers.SysLogHandler
89
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
90
address = "/dev/log"))
91
syslogger.setFormatter(logging.Formatter
92
(u'Mandos [%(process)d]: %(levelname)s:'
93
u' %(message)s'))
94
logger.addHandler(syslogger)
95
96
console = logging.StreamHandler()
97
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
98
u' %(levelname)s:'
99
u' %(message)s'))
100
logger.addHandler(console)
97
if sys.version_info.major == 2:
98
str = unicode
99
100
version = "1.7.7"
101
stored_state_file = "clients.pickle"
102
103
logger = logging.getLogger()
104
syslogger = None
105
106
try:
107
if_nametoindex = ctypes.cdll.LoadLibrary(
108
ctypes.util.find_library("c")).if_nametoindex
109
except (OSError, AttributeError):
110
111
def if_nametoindex(interface):
112
"Get an interface index the hard way, i.e. using fcntl()"
113
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
114
with contextlib.closing(socket.socket()) as s:
115
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
116
struct.pack(b"16s16x", interface))
117
interface_index = struct.unpack("I", ifreq[16:20])[0]
118
return interface_index
119
120
121
def copy_function(func):
122
"""Make a copy of a function"""
123
if sys.version_info.major == 2:
124
return types.FunctionType(func.func_code,
125
func.func_globals,
126
func.func_name,
127
func.func_defaults,
128
func.func_closure)
129
else:
130
return types.FunctionType(func.__code__,
131
func.__globals__,
132
func.__name__,
133
func.__defaults__,
134
func.__closure__)
135
136
137
def initlogger(debug, level=logging.WARNING):
138
"""init logger and add loglevel"""
139
140
global syslogger
141
syslogger = (logging.handlers.SysLogHandler(
142
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
143
address = "/dev/log"))
144
syslogger.setFormatter(logging.Formatter
145
('Mandos [%(process)d]: %(levelname)s:'
146
' %(message)s'))
147
logger.addHandler(syslogger)
148
149
if debug:
150
console = logging.StreamHandler()
151
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
152
' [%(process)d]:'
153
' %(levelname)s:'
154
' %(message)s'))
155
logger.addHandler(console)
156
logger.setLevel(level)
157
158
159
class PGPError(Exception):
160
"""Exception if encryption/decryption fails"""
161
pass
162
163
164
class PGPEngine(object):
165
"""A simple class for OpenPGP symmetric encryption & decryption"""
166
167
def __init__(self):
168
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
169
self.gpg = "gpg"
170
try:
171
output = subprocess.check_output(["gpgconf"])
172
for line in output.splitlines():
173
name, text, path = line.split(b":")
174
if name == "gpg":
175
self.gpg = path
176
break
177
except OSError as e:
178
if e.errno != errno.ENOENT:
179
raise
180
self.gnupgargs = ['--batch',
181
'--homedir', self.tempdir,
182
'--force-mdc',
183
'--quiet',
184
'--no-use-agent']
185
186
def __enter__(self):
187
return self
188
189
def __exit__(self, exc_type, exc_value, traceback):
190
self._cleanup()
191
return False
192
193
def __del__(self):
194
self._cleanup()
195
196
def _cleanup(self):
197
if self.tempdir is not None:
198
# Delete contents of tempdir
199
for root, dirs, files in os.walk(self.tempdir,
200
topdown = False):
201
for filename in files:
202
os.remove(os.path.join(root, filename))
203
for dirname in dirs:
204
os.rmdir(os.path.join(root, dirname))
205
# Remove tempdir
206
os.rmdir(self.tempdir)
207
self.tempdir = None
208
209
def password_encode(self, password):
210
# Passphrase can not be empty and can not contain newlines or
211
# NUL bytes. So we prefix it and hex encode it.
212
encoded = b"mandos" + binascii.hexlify(password)
213
if len(encoded) > 2048:
214
# GnuPG can't handle long passwords, so encode differently
215
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
216
.replace(b"\n", b"\\n")
217
.replace(b"\0", b"\\x00"))
218
return encoded
219
220
def encrypt(self, data, password):
221
passphrase = self.password_encode(password)
222
with tempfile.NamedTemporaryFile(
223
dir=self.tempdir) as passfile:
224
passfile.write(passphrase)
225
passfile.flush()
226
proc = subprocess.Popen([self.gpg, '--symmetric',
227
'--passphrase-file',
228
passfile.name]
229
+ self.gnupgargs,
230
stdin = subprocess.PIPE,
231
stdout = subprocess.PIPE,
232
stderr = subprocess.PIPE)
233
ciphertext, err = proc.communicate(input = data)
234
if proc.returncode != 0:
235
raise PGPError(err)
236
return ciphertext
237
238
def decrypt(self, data, password):
239
passphrase = self.password_encode(password)
240
with tempfile.NamedTemporaryFile(
241
dir = self.tempdir) as passfile:
242
passfile.write(passphrase)
243
passfile.flush()
244
proc = subprocess.Popen([self.gpg, '--decrypt',
245
'--passphrase-file',
246
passfile.name]
247
+ self.gnupgargs,
248
stdin = subprocess.PIPE,
249
stdout = subprocess.PIPE,
250
stderr = subprocess.PIPE)
251
decrypted_plaintext, err = proc.communicate(input = data)
252
if proc.returncode != 0:
253
raise PGPError(err)
254
return decrypted_plaintext
255
256
# Pretend that we have an Avahi module
257
class Avahi(object):
258
"""This isn't so much a class as it is a module-like namespace.
259
It is instantiated once, and simulates having an Avahi module."""
260
IF_UNSPEC = -1 # avahi-common/address.h
261
PROTO_UNSPEC = -1 # avahi-common/address.h
262
PROTO_INET = 0 # avahi-common/address.h
263
PROTO_INET6 = 1 # avahi-common/address.h
264
DBUS_NAME = "org.freedesktop.Avahi"
265
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
266
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
267
DBUS_PATH_SERVER = "/"
268
def string_array_to_txt_array(self, t):
269
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
270
for s in t), signature="ay")
271
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
272
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
273
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
274
SERVER_INVALID = 0 # avahi-common/defs.h
275
SERVER_REGISTERING = 1 # avahi-common/defs.h
276
SERVER_RUNNING = 2 # avahi-common/defs.h
277
SERVER_COLLISION = 3 # avahi-common/defs.h
278
SERVER_FAILURE = 4 # avahi-common/defs.h
279
avahi = Avahi()
101
280
102
281
class AvahiError(Exception):
103
282
def __init__(self, value, *args, **kwargs):
104
283
self.value = value
105
super(AvahiError, self).__init__(value, *args, **kwargs)
106
def __unicode__(self):
107
return unicode(repr(self.value))
284
return super(AvahiError, self).__init__(value, *args,
285
**kwargs)
286
108
287
109
288
class AvahiServiceError(AvahiError):
110
289
pass
111
290
291
112
292
class AvahiGroupError(AvahiError):
113
293
pass
114
294
119
299
Attributes:
120
300
interface: integer; avahi.IF_UNSPEC or an interface index.
121
301
Used to optionally bind to the specified interface.
122
name: string; Example: u'Mandos'
123
type: string; Example: u'_mandos._tcp'.
124
See <http://www.dns-sd.org/ServiceTypes.html>
302
name: string; Example: 'Mandos'
303
type: string; Example: '_mandos._tcp'.
304
See <https://www.iana.org/assignments/service-names-port-numbers>
125
305
port: integer; what port to announce
126
306
TXT: list of strings; TXT record for the service
127
307
domain: string; Domain to publish on, default to .local if empty.
133
313
server: D-Bus Server
134
314
bus: dbus.SystemBus()
135
315
"""
136
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
137
servicetype = None, port = None, TXT = None,
138
domain = u"", host = u"", max_renames = 32768,
139
protocol = avahi.PROTO_UNSPEC, bus = None):
316
317
def __init__(self,
318
interface = avahi.IF_UNSPEC,
319
name = None,
320
servicetype = None,
321
port = None,
322
TXT = None,
323
domain = "",
324
host = "",
325
max_renames = 32768,
326
protocol = avahi.PROTO_UNSPEC,
327
bus = None):
140
328
self.interface = interface
141
329
self.name = name
142
330
self.type = servicetype
150
338
self.group = None # our entry group
151
339
self.server = None
152
340
self.bus = bus
153
def rename(self):
341
self.entry_group_state_changed_match = None
342
343
def rename(self, remove=True):
154
344
"""Derived from the Avahi example code"""
155
345
if self.rename_count >= self.max_renames:
156
logger.critical(u"No suitable Zeroconf service name found"
157
u" after %i retries, exiting.",
346
logger.critical("No suitable Zeroconf service name found"
347
" after %i retries, exiting.",
158
348
self.rename_count)
159
raise AvahiServiceError(u"Too many renames")
160
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
161
logger.info(u"Changing Zeroconf service name to %r ...",
349
raise AvahiServiceError("Too many renames")
350
self.name = str(
351
self.server.GetAlternativeServiceName(self.name))
352
self.rename_count += 1
353
logger.info("Changing Zeroconf service name to %r ...",
162
354
self.name)
163
syslogger.setFormatter(logging.Formatter
164
(u'Mandos (%s) [%%(process)d]:'
165
u' %%(levelname)s: %%(message)s'
166
% self.name))
167
self.remove()
355
if remove:
356
self.remove()
168
357
try:
169
358
self.add()
170
except dbus.exceptions.DBusException, error:
171
logger.critical(u"DBusException: %s", error)
172
self.cleanup()
173
os._exit(1)
174
self.rename_count += 1
359
except dbus.exceptions.DBusException as error:
360
if (error.get_dbus_name()
361
== "org.freedesktop.Avahi.CollisionError"):
362
logger.info("Local Zeroconf service name collision.")
363
return self.rename(remove=False)
364
else:
365
logger.critical("D-Bus Exception", exc_info=error)
366
self.cleanup()
367
os._exit(1)
368
175
369
def remove(self):
176
370
"""Derived from the Avahi example code"""
371
if self.entry_group_state_changed_match is not None:
372
self.entry_group_state_changed_match.remove()
373
self.entry_group_state_changed_match = None
177
374
if self.group is not None:
178
375
self.group.Reset()
376
179
377
def add(self):
180
378
"""Derived from the Avahi example code"""
379
self.remove()
181
380
if self.group is None:
182
381
self.group = dbus.Interface(
183
382
self.bus.get_object(avahi.DBUS_NAME,
184
383
self.server.EntryGroupNew()),
185
384
avahi.DBUS_INTERFACE_ENTRY_GROUP)
186
self.group.connect_to_signal('StateChanged',
187
self
188
.entry_group_state_changed)
189
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
385
self.entry_group_state_changed_match = (
386
self.group.connect_to_signal(
387
'StateChanged', self.entry_group_state_changed))
388
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
190
389
self.name, self.type)
191
390
self.group.AddService(
192
391
self.interface,
197
396
dbus.UInt16(self.port),
198
397
avahi.string_array_to_txt_array(self.TXT))
199
398
self.group.Commit()
399
200
400
def entry_group_state_changed(self, state, error):
201
401
"""Derived from the Avahi example code"""
202
logger.debug(u"Avahi entry group state change: %i", state)
402
logger.debug("Avahi entry group state change: %i", state)
203
403
204
404
if state == avahi.ENTRY_GROUP_ESTABLISHED:
205
logger.debug(u"Zeroconf service established.")
405
logger.debug("Zeroconf service established.")
206
406
elif state == avahi.ENTRY_GROUP_COLLISION:
207
logger.warning(u"Zeroconf service name collision.")
407
logger.info("Zeroconf service name collision.")
208
408
self.rename()
209
409
elif state == avahi.ENTRY_GROUP_FAILURE:
210
logger.critical(u"Avahi: Error in group state changed %s",
211
unicode(error))
212
raise AvahiGroupError(u"State changed: %s"
213
% unicode(error))
410
logger.critical("Avahi: Error in group state changed %s",
411
str(error))
412
raise AvahiGroupError("State changed: {!s}".format(error))
413
214
414
def cleanup(self):
215
415
"""Derived from the Avahi example code"""
216
416
if self.group is not None:
217
self.group.Free()
417
try:
418
self.group.Free()
419
except (dbus.exceptions.UnknownMethodException,
420
dbus.exceptions.DBusException):
421
pass
218
422
self.group = None
219
def server_state_changed(self, state):
423
self.remove()
424
425
def server_state_changed(self, state, error=None):
220
426
"""Derived from the Avahi example code"""
221
logger.debug(u"Avahi server state change: %i", state)
222
if state == avahi.SERVER_COLLISION:
223
logger.error(u"Zeroconf server name collision")
224
self.remove()
427
logger.debug("Avahi server state change: %i", state)
428
bad_states = {
429
avahi.SERVER_INVALID: "Zeroconf server invalid",
430
avahi.SERVER_REGISTERING: None,
431
avahi.SERVER_COLLISION: "Zeroconf server name collision",
432
avahi.SERVER_FAILURE: "Zeroconf server failure",
433
}
434
if state in bad_states:
435
if bad_states[state] is not None:
436
if error is None:
437
logger.error(bad_states[state])
438
else:
439
logger.error(bad_states[state] + ": %r", error)
440
self.cleanup()
225
441
elif state == avahi.SERVER_RUNNING:
226
self.add()
442
try:
443
self.add()
444
except dbus.exceptions.DBusException as error:
445
if (error.get_dbus_name()
446
== "org.freedesktop.Avahi.CollisionError"):
447
logger.info("Local Zeroconf service name"
448
" collision.")
449
return self.rename(remove=False)
450
else:
451
logger.critical("D-Bus Exception", exc_info=error)
452
self.cleanup()
453
os._exit(1)
454
else:
455
if error is None:
456
logger.debug("Unknown state: %r", state)
457
else:
458
logger.debug("Unknown state: %r: %r", state, error)
459
227
460
def activate(self):
228
461
"""Derived from the Avahi example code"""
229
462
if self.server is None:
230
463
self.server = dbus.Interface(
231
464
self.bus.get_object(avahi.DBUS_NAME,
232
avahi.DBUS_PATH_SERVER),
465
avahi.DBUS_PATH_SERVER,
466
follow_name_owner_changes=True),
233
467
avahi.DBUS_INTERFACE_SERVER)
234
self.server.connect_to_signal(u"StateChanged",
235
self.server_state_changed)
468
self.server.connect_to_signal("StateChanged",
469
self.server_state_changed)
236
470
self.server_state_changed(self.server.GetState())
237
471
238
472
473
class AvahiServiceToSyslog(AvahiService):
474
def rename(self, *args, **kwargs):
475
"""Add the new name to the syslog messages"""
476
ret = AvahiService.rename(self, *args, **kwargs)
477
syslogger.setFormatter(logging.Formatter(
478
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
479
.format(self.name)))
480
return ret
481
482
# Pretend that we have a GnuTLS module
483
class GnuTLS(object):
484
"""This isn't so much a class as it is a module-like namespace.
485
It is instantiated once, and simulates having a GnuTLS module."""
486
487
_library = ctypes.cdll.LoadLibrary(
488
ctypes.util.find_library("gnutls"))
489
_need_version = b"3.3.0"
490
def __init__(self):
491
# Need to use class name "GnuTLS" here, since this method is
492
# called before the assignment to the "gnutls" global variable
493
# happens.
494
if GnuTLS.check_version(self._need_version) is None:
495
raise GnuTLS.Error("Needs GnuTLS {} or later"
496
.format(self._need_version))
497
498
# Unless otherwise indicated, the constants and types below are
499
# all from the gnutls/gnutls.h C header file.
500
501
# Constants
502
E_SUCCESS = 0
503
E_INTERRUPTED = -52
504
E_AGAIN = -28
505
CRT_OPENPGP = 2
506
CLIENT = 2
507
SHUT_RDWR = 0
508
CRD_CERTIFICATE = 1
509
E_NO_CERTIFICATE_FOUND = -49
510
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
511
512
# Types
513
class session_int(ctypes.Structure):
514
_fields_ = []
515
session_t = ctypes.POINTER(session_int)
516
class certificate_credentials_st(ctypes.Structure):
517
_fields_ = []
518
certificate_credentials_t = ctypes.POINTER(
519
certificate_credentials_st)
520
certificate_type_t = ctypes.c_int
521
class datum_t(ctypes.Structure):
522
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
523
('size', ctypes.c_uint)]
524
class openpgp_crt_int(ctypes.Structure):
525
_fields_ = []
526
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
527
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
528
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
529
credentials_type_t = ctypes.c_int
530
transport_ptr_t = ctypes.c_void_p
531
close_request_t = ctypes.c_int
532
533
# Exceptions
534
class Error(Exception):
535
# We need to use the class name "GnuTLS" here, since this
536
# exception might be raised from within GnuTLS.__init__,
537
# which is called before the assignment to the "gnutls"
538
# global variable has happened.
539
def __init__(self, message = None, code = None, args=()):
540
# Default usage is by a message string, but if a return
541
# code is passed, convert it to a string with
542
# gnutls.strerror()
543
self.code = code
544
if message is None and code is not None:
545
message = GnuTLS.strerror(code)
546
return super(GnuTLS.Error, self).__init__(
547
message, *args)
548
549
class CertificateSecurityError(Error):
550
pass
551
552
# Classes
553
class Credentials(object):
554
def __init__(self):
555
self._c_object = gnutls.certificate_credentials_t()
556
gnutls.certificate_allocate_credentials(
557
ctypes.byref(self._c_object))
558
self.type = gnutls.CRD_CERTIFICATE
559
560
def __del__(self):
561
gnutls.certificate_free_credentials(self._c_object)
562
563
class ClientSession(object):
564
def __init__(self, socket, credentials = None):
565
self._c_object = gnutls.session_t()
566
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
567
gnutls.set_default_priority(self._c_object)
568
gnutls.transport_set_ptr(self._c_object, socket.fileno())
569
gnutls.handshake_set_private_extensions(self._c_object,
570
True)
571
self.socket = socket
572
if credentials is None:
573
credentials = gnutls.Credentials()
574
gnutls.credentials_set(self._c_object, credentials.type,
575
ctypes.cast(credentials._c_object,
576
ctypes.c_void_p))
577
self.credentials = credentials
578
579
def __del__(self):
580
gnutls.deinit(self._c_object)
581
582
def handshake(self):
583
return gnutls.handshake(self._c_object)
584
585
def send(self, data):
586
data = bytes(data)
587
data_len = len(data)
588
while data_len > 0:
589
data_len -= gnutls.record_send(self._c_object,
590
data[-data_len:],
591
data_len)
592
593
def bye(self):
594
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
595
596
# Error handling functions
597
def _error_code(result):
598
"""A function to raise exceptions on errors, suitable
599
for the 'restype' attribute on ctypes functions"""
600
if result >= 0:
601
return result
602
if result == gnutls.E_NO_CERTIFICATE_FOUND:
603
raise gnutls.CertificateSecurityError(code = result)
604
raise gnutls.Error(code = result)
605
606
def _retry_on_error(result, func, arguments):
607
"""A function to retry on some errors, suitable
608
for the 'errcheck' attribute on ctypes functions"""
609
while result < 0:
610
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
611
return _error_code(result)
612
result = func(*arguments)
613
return result
614
615
# Unless otherwise indicated, the function declarations below are
616
# all from the gnutls/gnutls.h C header file.
617
618
# Functions
619
priority_set_direct = _library.gnutls_priority_set_direct
620
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
621
ctypes.POINTER(ctypes.c_char_p)]
622
priority_set_direct.restype = _error_code
623
624
init = _library.gnutls_init
625
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
626
init.restype = _error_code
627
628
set_default_priority = _library.gnutls_set_default_priority
629
set_default_priority.argtypes = [session_t]
630
set_default_priority.restype = _error_code
631
632
record_send = _library.gnutls_record_send
633
record_send.argtypes = [session_t, ctypes.c_void_p,
634
ctypes.c_size_t]
635
record_send.restype = ctypes.c_ssize_t
636
record_send.errcheck = _retry_on_error
637
638
certificate_allocate_credentials = (
639
_library.gnutls_certificate_allocate_credentials)
640
certificate_allocate_credentials.argtypes = [
641
ctypes.POINTER(certificate_credentials_t)]
642
certificate_allocate_credentials.restype = _error_code
643
644
certificate_free_credentials = (
645
_library.gnutls_certificate_free_credentials)
646
certificate_free_credentials.argtypes = [certificate_credentials_t]
647
certificate_free_credentials.restype = None
648
649
handshake_set_private_extensions = (
650
_library.gnutls_handshake_set_private_extensions)
651
handshake_set_private_extensions.argtypes = [session_t,
652
ctypes.c_int]
653
handshake_set_private_extensions.restype = None
654
655
credentials_set = _library.gnutls_credentials_set
656
credentials_set.argtypes = [session_t, credentials_type_t,
657
ctypes.c_void_p]
658
credentials_set.restype = _error_code
659
660
strerror = _library.gnutls_strerror
661
strerror.argtypes = [ctypes.c_int]
662
strerror.restype = ctypes.c_char_p
663
664
certificate_type_get = _library.gnutls_certificate_type_get
665
certificate_type_get.argtypes = [session_t]
666
certificate_type_get.restype = _error_code
667
668
certificate_get_peers = _library.gnutls_certificate_get_peers
669
certificate_get_peers.argtypes = [session_t,
670
ctypes.POINTER(ctypes.c_uint)]
671
certificate_get_peers.restype = ctypes.POINTER(datum_t)
672
673
global_set_log_level = _library.gnutls_global_set_log_level
674
global_set_log_level.argtypes = [ctypes.c_int]
675
global_set_log_level.restype = None
676
677
global_set_log_function = _library.gnutls_global_set_log_function
678
global_set_log_function.argtypes = [log_func]
679
global_set_log_function.restype = None
680
681
deinit = _library.gnutls_deinit
682
deinit.argtypes = [session_t]
683
deinit.restype = None
684
685
handshake = _library.gnutls_handshake
686
handshake.argtypes = [session_t]
687
handshake.restype = _error_code
688
handshake.errcheck = _retry_on_error
689
690
transport_set_ptr = _library.gnutls_transport_set_ptr
691
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
692
transport_set_ptr.restype = None
693
694
bye = _library.gnutls_bye
695
bye.argtypes = [session_t, close_request_t]
696
bye.restype = _error_code
697
bye.errcheck = _retry_on_error
698
699
check_version = _library.gnutls_check_version
700
check_version.argtypes = [ctypes.c_char_p]
701
check_version.restype = ctypes.c_char_p
702
703
# All the function declarations below are from gnutls/openpgp.h
704
705
openpgp_crt_init = _library.gnutls_openpgp_crt_init
706
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
707
openpgp_crt_init.restype = _error_code
708
709
openpgp_crt_import = _library.gnutls_openpgp_crt_import
710
openpgp_crt_import.argtypes = [openpgp_crt_t,
711
ctypes.POINTER(datum_t),
712
openpgp_crt_fmt_t]
713
openpgp_crt_import.restype = _error_code
714
715
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
716
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
717
ctypes.POINTER(ctypes.c_uint)]
718
openpgp_crt_verify_self.restype = _error_code
719
720
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
721
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
722
openpgp_crt_deinit.restype = None
723
724
openpgp_crt_get_fingerprint = (
725
_library.gnutls_openpgp_crt_get_fingerprint)
726
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
727
ctypes.c_void_p,
728
ctypes.POINTER(
729
ctypes.c_size_t)]
730
openpgp_crt_get_fingerprint.restype = _error_code
731
732
# Remove non-public functions
733
del _error_code, _retry_on_error
734
# Create the global "gnutls" object, simulating a module
735
gnutls = GnuTLS()
736
737
def call_pipe(connection, # : multiprocessing.Connection
738
func, *args, **kwargs):
739
"""This function is meant to be called by multiprocessing.Process
740
741
This function runs func(*args, **kwargs), and writes the resulting
742
return value on the provided multiprocessing.Connection.
743
"""
744
connection.send(func(*args, **kwargs))
745
connection.close()
746
239
747
class Client(object):
240
748
"""A representation of a client host served by this server.
241
749
242
750
Attributes:
243
name: string; from the config file, used in log messages and
244
D-Bus identifiers
751
approved: bool(); 'None' if not yet approved/disapproved
752
approval_delay: datetime.timedelta(); Time to wait for approval
753
approval_duration: datetime.timedelta(); Duration of one approval
754
checker: subprocess.Popen(); a running checker process used
755
to see if the client lives.
756
'None' if no process is running.
757
checker_callback_tag: a GLib event source tag, or None
758
checker_command: string; External command which is run to check
759
if client lives. %() expansions are done at
760
runtime with vars(self) as dict, so that for
761
instance %(name)s can be used in the command.
762
checker_initiator_tag: a GLib event source tag, or None
763
created: datetime.datetime(); (UTC) object creation
764
client_structure: Object describing what attributes a client has
765
and is used for storing the client at exit
766
current_checker_command: string; current running checker_command
767
disable_initiator_tag: a GLib event source tag, or None
768
enabled: bool()
245
769
fingerprint: string (40 or 32 hexadecimal digits); used to
246
770
uniquely identify the client
247
secret: bytestring; sent verbatim (over TLS) to client
248
771
host: string; available for use by the checker command
249
created: datetime.datetime(); (UTC) object creation
250
last_enabled: datetime.datetime(); (UTC)
251
enabled: bool()
772
interval: datetime.timedelta(); How often to start a new checker
773
last_approval_request: datetime.datetime(); (UTC) or None
252
774
last_checked_ok: datetime.datetime(); (UTC) or None
775
last_checker_status: integer between 0 and 255 reflecting exit
776
status of last checker. -1 reflects crashed
777
checker, -2 means no checker completed yet.
778
last_checker_signal: The signal which killed the last checker, if
779
last_checker_status is -1
780
last_enabled: datetime.datetime(); (UTC) or None
781
name: string; from the config file, used in log messages and
782
D-Bus identifiers
783
secret: bytestring; sent verbatim (over TLS) to client
253
784
timeout: datetime.timedelta(); How long from last_checked_ok
254
785
until this client is disabled
255
interval: datetime.timedelta(); How often to start a new checker
256
disable_hook: If set, called by disable() as disable_hook(self)
257
checker: subprocess.Popen(); a running checker process used
258
to see if the client lives.
259
'None' if no process is running.
260
checker_initiator_tag: a gobject event source tag, or None
261
disable_initiator_tag: - '' -
262
checker_callback_tag: - '' -
263
checker_command: string; External command which is run to check if
264
client lives. %() expansions are done at
265
runtime with vars(self) as dict, so that for
266
instance %(name)s can be used in the command.
267
current_checker_command: string; current running checker_command
268
approval_delay: datetime.timedelta(); Time to wait for approval
269
_approved: bool(); 'None' if not yet approved/disapproved
270
approval_duration: datetime.timedelta(); Duration of one approval
786
extended_timeout: extra long timeout when secret has been sent
787
runtime_expansions: Allowed attributes for runtime expansion.
788
expires: datetime.datetime(); time (UTC) when a client will be
789
disabled, or None
790
server_settings: The server_settings dict from main()
271
791
"""
272
792
793
runtime_expansions = ("approval_delay", "approval_duration",
794
"created", "enabled", "expires",
795
"fingerprint", "host", "interval",
796
"last_approval_request", "last_checked_ok",
797
"last_enabled", "name", "timeout")
798
client_defaults = {
799
"timeout": "PT5M",
800
"extended_timeout": "PT15M",
801
"interval": "PT2M",
802
"checker": "fping -q -- %%(host)s",
803
"host": "",
804
"approval_delay": "PT0S",
805
"approval_duration": "PT1S",
806
"approved_by_default": "True",
807
"enabled": "True",
808
}
809
273
810
@staticmethod
274
def _timedelta_to_milliseconds(td):
275
"Convert a datetime.timedelta() to milliseconds"
276
return ((td.days * 24 * 60 * 60 * 1000)
277
+ (td.seconds * 1000)
278
+ (td.microseconds // 1000))
279
280
def timeout_milliseconds(self):
281
"Return the 'timeout' attribute in milliseconds"
282
return self._timedelta_to_milliseconds(self.timeout)
283
284
def interval_milliseconds(self):
285
"Return the 'interval' attribute in milliseconds"
286
return self._timedelta_to_milliseconds(self.interval)
287
288
def approval_delay_milliseconds(self):
289
return self._timedelta_to_milliseconds(self.approval_delay)
290
291
def __init__(self, name = None, disable_hook=None, config=None):
292
"""Note: the 'checker' key in 'config' sets the
293
'checker_command' attribute and *not* the 'checker'
294
attribute."""
811
def config_parser(config):
812
"""Construct a new dict of client settings of this form:
813
{ client_name: {setting_name: value, ...}, ...}
814
with exceptions for any special settings as defined above.
815
NOTE: Must be a pure function. Must return the same result
816
value given the same arguments.
817
"""
818
settings = {}
819
for client_name in config.sections():
820
section = dict(config.items(client_name))
821
client = settings[client_name] = {}
822
823
client["host"] = section["host"]
824
# Reformat values from string types to Python types
825
client["approved_by_default"] = config.getboolean(
826
client_name, "approved_by_default")
827
client["enabled"] = config.getboolean(client_name,
828
"enabled")
829
830
# Uppercase and remove spaces from fingerprint for later
831
# comparison purposes with return value from the
832
# fingerprint() function
833
client["fingerprint"] = (section["fingerprint"].upper()
834
.replace(" ", ""))
835
if "secret" in section:
836
client["secret"] = codecs.decode(section["secret"]
837
.encode("utf-8"),
838
"base64")
839
elif "secfile" in section:
840
with open(os.path.expanduser(os.path.expandvars
841
(section["secfile"])),
842
"rb") as secfile:
843
client["secret"] = secfile.read()
844
else:
845
raise TypeError("No secret or secfile for section {}"
846
.format(section))
847
client["timeout"] = string_to_delta(section["timeout"])
848
client["extended_timeout"] = string_to_delta(
849
section["extended_timeout"])
850
client["interval"] = string_to_delta(section["interval"])
851
client["approval_delay"] = string_to_delta(
852
section["approval_delay"])
853
client["approval_duration"] = string_to_delta(
854
section["approval_duration"])
855
client["checker_command"] = section["checker"]
856
client["last_approval_request"] = None
857
client["last_checked_ok"] = None
858
client["last_checker_status"] = -2
859
860
return settings
861
862
def __init__(self, settings, name = None, server_settings=None):
295
863
self.name = name
296
if config is None:
297
config = {}
298
logger.debug(u"Creating client %r", self.name)
299
# Uppercase and remove spaces from fingerprint for later
300
# comparison purposes with return value from the fingerprint()
301
# function
302
self.fingerprint = (config[u"fingerprint"].upper()
303
.replace(u" ", u""))
304
logger.debug(u" Fingerprint: %s", self.fingerprint)
305
if u"secret" in config:
306
self.secret = config[u"secret"].decode(u"base64")
307
elif u"secfile" in config:
308
with open(os.path.expanduser(os.path.expandvars
309
(config[u"secfile"])),
310
"rb") as secfile:
311
self.secret = secfile.read()
864
if server_settings is None:
865
server_settings = {}
866
self.server_settings = server_settings
867
# adding all client settings
868
for setting, value in settings.items():
869
setattr(self, setting, value)
870
871
if self.enabled:
872
if not hasattr(self, "last_enabled"):
873
self.last_enabled = datetime.datetime.utcnow()
874
if not hasattr(self, "expires"):
875
self.expires = (datetime.datetime.utcnow()
876
+ self.timeout)
312
877
else:
313
raise TypeError(u"No secret or secfile for client %s"
314
% self.name)
315
self.host = config.get(u"host", u"")
316
self.created = datetime.datetime.utcnow()
317
self.enabled = False
318
self.last_enabled = None
319
self.last_checked_ok = None
320
self.timeout = string_to_delta(config[u"timeout"])
321
self.interval = string_to_delta(config[u"interval"])
322
self.disable_hook = disable_hook
878
self.last_enabled = None
879
self.expires = None
880
881
logger.debug("Creating client %r", self.name)
882
logger.debug(" Fingerprint: %s", self.fingerprint)
883
self.created = settings.get("created",
884
datetime.datetime.utcnow())
885
886
# attributes specific for this server instance
323
887
self.checker = None
324
888
self.checker_initiator_tag = None
325
889
self.disable_initiator_tag = None
326
890
self.checker_callback_tag = None
327
self.checker_command = config[u"checker"]
328
891
self.current_checker_command = None
329
self.last_connect = None
330
self._approved = None
331
self.approved_by_default = config.get(u"approved_by_default",
332
True)
892
self.approved = None
333
893
self.approvals_pending = 0
334
self.approval_delay = string_to_delta(
335
config[u"approval_delay"])
336
self.approval_duration = string_to_delta(
337
config[u"approval_duration"])
338
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
894
self.changedstate = multiprocessing_manager.Condition(
895
multiprocessing_manager.Lock())
896
self.client_structure = [attr
897
for attr in self.__dict__.keys()
898
if not attr.startswith("_")]
899
self.client_structure.append("client_structure")
900
901
for name, t in inspect.getmembers(
902
type(self), lambda obj: isinstance(obj, property)):
903
if not name.startswith("_"):
904
self.client_structure.append(name)
339
905
906
# Send notice to process children that client state has changed
340
907
def send_changedstate(self):
341
self.changedstate.acquire()
342
self.changedstate.notify_all()
343
self.changedstate.release()
344
908
with self.changedstate:
909
self.changedstate.notify_all()
910
345
911
def enable(self):
346
912
"""Start this client's checker and timeout hooks"""
347
if getattr(self, u"enabled", False):
913
if getattr(self, "enabled", False):
348
914
# Already enabled
349
915
return
350
self.send_changedstate()
916
self.expires = datetime.datetime.utcnow() + self.timeout
917
self.enabled = True
351
918
self.last_enabled = datetime.datetime.utcnow()
919
self.init_checker()
920
self.send_changedstate()
921
922
def disable(self, quiet=True):
923
"""Disable this client."""
924
if not getattr(self, "enabled", False):
925
return False
926
if not quiet:
927
logger.info("Disabling client %s", self.name)
928
if getattr(self, "disable_initiator_tag", None) is not None:
929
GLib.source_remove(self.disable_initiator_tag)
930
self.disable_initiator_tag = None
931
self.expires = None
932
if getattr(self, "checker_initiator_tag", None) is not None:
933
GLib.source_remove(self.checker_initiator_tag)
934
self.checker_initiator_tag = None
935
self.stop_checker()
936
self.enabled = False
937
if not quiet:
938
self.send_changedstate()
939
# Do not run this again if called by a GLib.timeout_add
940
return False
941
942
def __del__(self):
943
self.disable()
944
945
def init_checker(self):
352
946
# Schedule a new checker to be started an 'interval' from now,
353
947
# and every interval from then on.
354
self.checker_initiator_tag = (gobject.timeout_add
355
(self.interval_milliseconds(),
356
self.start_checker))
948
if self.checker_initiator_tag is not None:
949
GLib.source_remove(self.checker_initiator_tag)
950
self.checker_initiator_tag = GLib.timeout_add(
951
int(self.interval.total_seconds() * 1000),
952
self.start_checker)
357
953
# Schedule a disable() when 'timeout' has passed
358
self.disable_initiator_tag = (gobject.timeout_add
359
(self.timeout_milliseconds(),
360
self.disable))
361
self.enabled = True
954
if self.disable_initiator_tag is not None:
955
GLib.source_remove(self.disable_initiator_tag)
956
self.disable_initiator_tag = GLib.timeout_add(
957
int(self.timeout.total_seconds() * 1000), self.disable)
362
958
# Also start a new checker *right now*.
363
959
self.start_checker()
364
960
365
def disable(self, quiet=True):
366
"""Disable this client."""
367
if not getattr(self, "enabled", False):
368
return False
369
if not quiet:
370
self.send_changedstate()
371
if not quiet:
372
logger.info(u"Disabling client %s", self.name)
373
if getattr(self, u"disable_initiator_tag", False):
374
gobject.source_remove(self.disable_initiator_tag)
375
self.disable_initiator_tag = None
376
if getattr(self, u"checker_initiator_tag", False):
377
gobject.source_remove(self.checker_initiator_tag)
378
self.checker_initiator_tag = None
379
self.stop_checker()
380
if self.disable_hook:
381
self.disable_hook(self)
382
self.enabled = False
383
# Do not run this again if called by a gobject.timeout_add
384
return False
385
386
def __del__(self):
387
self.disable_hook = None
388
self.disable()
389
390
def checker_callback(self, pid, condition, command):
961
def checker_callback(self, source, condition, connection,
962
command):
391
963
"""The checker has completed, so take appropriate actions."""
392
964
self.checker_callback_tag = None
393
965
self.checker = None
394
if os.WIFEXITED(condition):
395
exitstatus = os.WEXITSTATUS(condition)
396
if exitstatus == 0:
397
logger.info(u"Checker for %(name)s succeeded",
966
# Read return code from connection (see call_pipe)
967
returncode = connection.recv()
968
connection.close()
969
970
if returncode >= 0:
971
self.last_checker_status = returncode
972
self.last_checker_signal = None
973
if self.last_checker_status == 0:
974
logger.info("Checker for %(name)s succeeded",
398
975
vars(self))
399
976
self.checked_ok()
400
977
else:
401
logger.info(u"Checker for %(name)s failed",
402
vars(self))
978
logger.info("Checker for %(name)s failed", vars(self))
403
979
else:
404
logger.warning(u"Checker for %(name)s crashed?",
980
self.last_checker_status = -1
981
self.last_checker_signal = -returncode
982
logger.warning("Checker for %(name)s crashed?",
405
983
vars(self))
984
return False
406
985
407
986
def checked_ok(self):
408
"""Bump up the timeout for this client.
409
410
This should only be called when the client has been seen,
411
alive and well.
412
"""
987
"""Assert that the client has been seen, alive and well."""
413
988
self.last_checked_ok = datetime.datetime.utcnow()
414
gobject.source_remove(self.disable_initiator_tag)
415
self.disable_initiator_tag = (gobject.timeout_add
416
(self.timeout_milliseconds(),
417
self.disable))
989
self.last_checker_status = 0
990
self.last_checker_signal = None
991
self.bump_timeout()
992
993
def bump_timeout(self, timeout=None):
994
"""Bump up the timeout for this client."""
995
if timeout is None:
996
timeout = self.timeout
997
if self.disable_initiator_tag is not None:
998
GLib.source_remove(self.disable_initiator_tag)
999
self.disable_initiator_tag = None
1000
if getattr(self, "enabled", False):
1001
self.disable_initiator_tag = GLib.timeout_add(
1002
int(timeout.total_seconds() * 1000), self.disable)
1003
self.expires = datetime.datetime.utcnow() + timeout
1004
1005
def need_approval(self):
1006
self.last_approval_request = datetime.datetime.utcnow()
418
1007
419
1008
def start_checker(self):
420
1009
"""Start a new checker subprocess if one is not running.
422
1011
If a checker already exists, leave it running and do
423
1012
nothing."""
424
1013
# The reason for not killing a running checker is that if we
425
# did that, then if a checker (for some reason) started
426
# running slowly and taking more than 'interval' time, the
427
# client would inevitably timeout, since no checker would get
428
# a chance to run to completion. If we instead leave running
1014
# did that, and if a checker (for some reason) started running
1015
# slowly and taking more than 'interval' time, then the client
1016
# would inevitably timeout, since no checker would get a
1017
# chance to run to completion. If we instead leave running
429
1018
# checkers alone, the checker would have to take more time
430
1019
# than 'timeout' for the client to be disabled, which is as it
431
1020
# should be.
432
1021
433
# If a checker exists, make sure it is not a zombie
434
try:
435
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
436
except (AttributeError, OSError), error:
437
if (isinstance(error, OSError)
438
and error.errno != errno.ECHILD):
439
raise error
440
else:
441
if pid:
442
logger.warning(u"Checker was a zombie")
443
gobject.source_remove(self.checker_callback_tag)
444
self.checker_callback(pid, status,
445
self.current_checker_command)
1022
if self.checker is not None and not self.checker.is_alive():
1023
logger.warning("Checker was not alive; joining")
1024
self.checker.join()
1025
self.checker = None
446
1026
# Start a new checker if needed
447
1027
if self.checker is None:
1028
# Escape attributes for the shell
1029
escaped_attrs = {
1030
attr: re.escape(str(getattr(self, attr)))
1031
for attr in self.runtime_expansions }
448
1032
try:
449
# In case checker_command has exactly one % operator
450
command = self.checker_command % self.host
451
except TypeError:
452
# Escape attributes for the shell
453
escaped_attrs = dict((key,
454
re.escape(unicode(str(val),
455
errors=
456
u'replace')))
457
for key, val in
458
vars(self).iteritems())
459
try:
460
command = self.checker_command % escaped_attrs
461
except TypeError, error:
462
logger.error(u'Could not format string "%s":'
463
u' %s', self.checker_command, error)
464
return True # Try again later
1033
command = self.checker_command % escaped_attrs
1034
except TypeError as error:
1035
logger.error('Could not format string "%s"',
1036
self.checker_command,
1037
exc_info=error)
1038
return True # Try again later
465
1039
self.current_checker_command = command
466
try:
467
logger.info(u"Starting checker %r for %s",
468
command, self.name)
469
# We don't need to redirect stdout and stderr, since
470
# in normal mode, that is already done by daemon(),
471
# and in debug mode we don't want to. (Stdin is
472
# always replaced by /dev/null.)
473
self.checker = subprocess.Popen(command,
474
close_fds=True,
475
shell=True, cwd=u"/")
476
self.checker_callback_tag = (gobject.child_watch_add
477
(self.checker.pid,
478
self.checker_callback,
479
data=command))
480
# The checker may have completed before the gobject
481
# watch was added. Check for this.
482
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
483
if pid:
484
gobject.source_remove(self.checker_callback_tag)
485
self.checker_callback(pid, status, command)
486
except OSError, error:
487
logger.error(u"Failed to start subprocess: %s",
488
error)
489
# Re-run this periodically if run by gobject.timeout_add
1040
logger.info("Starting checker %r for %s", command,
1041
self.name)
1042
# We don't need to redirect stdout and stderr, since
1043
# in normal mode, that is already done by daemon(),
1044
# and in debug mode we don't want to. (Stdin is
1045
# always replaced by /dev/null.)
1046
# The exception is when not debugging but nevertheless
1047
# running in the foreground; use the previously
1048
# created wnull.
1049
popen_args = { "close_fds": True,
1050
"shell": True,
1051
"cwd": "/" }
1052
if (not self.server_settings["debug"]
1053
and self.server_settings["foreground"]):
1054
popen_args.update({"stdout": wnull,
1055
"stderr": wnull })
1056
pipe = multiprocessing.Pipe(duplex = False)
1057
self.checker = multiprocessing.Process(
1058
target = call_pipe,
1059
args = (pipe[1], subprocess.call, command),
1060
kwargs = popen_args)
1061
self.checker.start()
1062
self.checker_callback_tag = GLib.io_add_watch(
1063
pipe[0].fileno(), GLib.IO_IN,
1064
self.checker_callback, pipe[0], command)
1065
# Re-run this periodically if run by GLib.timeout_add
490
1066
return True
491
1067
492
1068
def stop_checker(self):
493
1069
"""Force the checker process, if any, to stop."""
494
1070
if self.checker_callback_tag:
495
gobject.source_remove(self.checker_callback_tag)
1071
GLib.source_remove(self.checker_callback_tag)
496
1072
self.checker_callback_tag = None
497
if getattr(self, u"checker", None) is None:
1073
if getattr(self, "checker", None) is None:
498
1074
return
499
logger.debug(u"Stopping checker for %(name)s", vars(self))
500
try:
501
os.kill(self.checker.pid, signal.SIGTERM)
502
#time.sleep(0.5)
503
#if self.checker.poll() is None:
504
# os.kill(self.checker.pid, signal.SIGKILL)
505
except OSError, error:
506
if error.errno != errno.ESRCH: # No such process
507
raise
1075
logger.debug("Stopping checker for %(name)s", vars(self))
1076
self.checker.terminate()
508
1077
self.checker = None
509
1078
510
def dbus_service_property(dbus_interface, signature=u"v",
511
access=u"readwrite", byte_arrays=False):
1079
1080
def dbus_service_property(dbus_interface,
1081
signature="v",
1082
access="readwrite",
1083
byte_arrays=False):
512
1084
"""Decorators for marking methods of a DBusObjectWithProperties to
513
1085
become properties on the D-Bus.
514
1086
521
1093
"""
522
1094
# Encoding deeply encoded byte arrays is not supported yet by the
523
1095
# "Set" method, so we fail early here:
524
if byte_arrays and signature != u"ay":
525
raise ValueError(u"Byte arrays not supported for non-'ay'"
526
u" signature %r" % signature)
1096
if byte_arrays and signature != "ay":
1097
raise ValueError("Byte arrays not supported for non-'ay'"
1098
" signature {!r}".format(signature))
1099
527
1100
def decorator(func):
528
1101
func._dbus_is_property = True
529
1102
func._dbus_interface = dbus_interface
530
1103
func._dbus_signature = signature
531
1104
func._dbus_access = access
532
1105
func._dbus_name = func.__name__
533
if func._dbus_name.endswith(u"_dbus_property"):
1106
if func._dbus_name.endswith("_dbus_property"):
534
1107
func._dbus_name = func._dbus_name[:-14]
535
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
536
return func
1108
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
1109
return func
1110
1111
return decorator
1112
1113
1114
def dbus_interface_annotations(dbus_interface):
1115
"""Decorator for marking functions returning interface annotations
1116
1117
Usage:
1118
1119
@dbus_interface_annotations("org.example.Interface")
1120
def _foo(self): # Function name does not matter
1121
return {"org.freedesktop.DBus.Deprecated": "true",
1122
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1123
"false"}
1124
"""
1125
1126
def decorator(func):
1127
func._dbus_is_interface = True
1128
func._dbus_interface = dbus_interface
1129
func._dbus_name = dbus_interface
1130
return func
1131
1132
return decorator
1133
1134
1135
def dbus_annotations(annotations):
1136
"""Decorator to annotate D-Bus methods, signals or properties
1137
Usage:
1138
1139
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1140
"org.freedesktop.DBus.Property."
1141
"EmitsChangedSignal": "false"})
1142
@dbus_service_property("org.example.Interface", signature="b",
1143
access="r")
1144
def Property_dbus_property(self):
1145
return dbus.Boolean(False)
1146
1147
See also the DBusObjectWithAnnotations class.
1148
"""
1149
1150
def decorator(func):
1151
func._dbus_annotations = annotations
1152
return func
1153
537
1154
return decorator
538
1155
539
1156
540
1157
class DBusPropertyException(dbus.exceptions.DBusException):
541
1158
"""A base class for D-Bus property-related exceptions
542
1159
"""
543
def __unicode__(self):
544
return unicode(str(self))
1160
pass
545
1161
546
1162
547
1163
class DBusPropertyAccessException(DBusPropertyException):
556
1172
pass
557
1173
558
1174
559
class DBusObjectWithProperties(dbus.service.Object):
1175
class DBusObjectWithAnnotations(dbus.service.Object):
1176
"""A D-Bus object with annotations.
1177
1178
Classes inheriting from this can use the dbus_annotations
1179
decorator to add annotations to methods or signals.
1180
"""
1181
1182
@staticmethod
1183
def _is_dbus_thing(thing):
1184
"""Returns a function testing if an attribute is a D-Bus thing
1185
1186
If called like _is_dbus_thing("method") it returns a function
1187
suitable for use as predicate to inspect.getmembers().
1188
"""
1189
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1190
False)
1191
1192
def _get_all_dbus_things(self, thing):
1193
"""Returns a generator of (name, attribute) pairs
1194
"""
1195
return ((getattr(athing.__get__(self), "_dbus_name", name),
1196
athing.__get__(self))
1197
for cls in self.__class__.__mro__
1198
for name, athing in
1199
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1200
1201
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1202
out_signature = "s",
1203
path_keyword = 'object_path',
1204
connection_keyword = 'connection')
1205
def Introspect(self, object_path, connection):
1206
"""Overloading of standard D-Bus method.
1207
1208
Inserts annotation tags on methods and signals.
1209
"""
1210
xmlstring = dbus.service.Object.Introspect(self, object_path,
1211
connection)
1212
try:
1213
document = xml.dom.minidom.parseString(xmlstring)
1214
1215
for if_tag in document.getElementsByTagName("interface"):
1216
# Add annotation tags
1217
for typ in ("method", "signal"):
1218
for tag in if_tag.getElementsByTagName(typ):
1219
annots = dict()
1220
for name, prop in (self.
1221
_get_all_dbus_things(typ)):
1222
if (name == tag.getAttribute("name")
1223
and prop._dbus_interface
1224
== if_tag.getAttribute("name")):
1225
annots.update(getattr(
1226
prop, "_dbus_annotations", {}))
1227
for name, value in annots.items():
1228
ann_tag = document.createElement(
1229
"annotation")
1230
ann_tag.setAttribute("name", name)
1231
ann_tag.setAttribute("value", value)
1232
tag.appendChild(ann_tag)
1233
# Add interface annotation tags
1234
for annotation, value in dict(
1235
itertools.chain.from_iterable(
1236
annotations().items()
1237
for name, annotations
1238
in self._get_all_dbus_things("interface")
1239
if name == if_tag.getAttribute("name")
1240
)).items():
1241
ann_tag = document.createElement("annotation")
1242
ann_tag.setAttribute("name", annotation)
1243
ann_tag.setAttribute("value", value)
1244
if_tag.appendChild(ann_tag)
1245
# Fix argument name for the Introspect method itself
1246
if (if_tag.getAttribute("name")
1247
== dbus.INTROSPECTABLE_IFACE):
1248
for cn in if_tag.getElementsByTagName("method"):
1249
if cn.getAttribute("name") == "Introspect":
1250
for arg in cn.getElementsByTagName("arg"):
1251
if (arg.getAttribute("direction")
1252
== "out"):
1253
arg.setAttribute("name",
1254
"xml_data")
1255
xmlstring = document.toxml("utf-8")
1256
document.unlink()
1257
except (AttributeError, xml.dom.DOMException,
1258
xml.parsers.expat.ExpatError) as error:
1259
logger.error("Failed to override Introspection method",
1260
exc_info=error)
1261
return xmlstring
1262
1263
1264
class DBusObjectWithProperties(DBusObjectWithAnnotations):
560
1265
"""A D-Bus object with properties.
561
1266
562
1267
Classes inheriting from this can use the dbus_service_property
563
1268
decorator to expose methods as D-Bus properties. It exposes the
564
1269
standard Get(), Set(), and GetAll() methods on the D-Bus.
565
1270
"""
566
1271
567
@staticmethod
568
def _is_dbus_property(obj):
569
return getattr(obj, u"_dbus_is_property", False)
570
571
def _get_all_dbus_properties(self):
572
"""Returns a generator of (name, attribute) pairs
573
"""
574
return ((prop._dbus_name, prop)
575
for name, prop in
576
inspect.getmembers(self, self._is_dbus_property))
577
578
1272
def _get_dbus_property(self, interface_name, property_name):
579
1273
"""Returns a bound method if one exists which is a D-Bus
580
1274
property with the specified name and interface.
581
1275
"""
582
for name in (property_name,
583
property_name + u"_dbus_property"):
584
prop = getattr(self, name, None)
585
if (prop is None
586
or not self._is_dbus_property(prop)
587
or prop._dbus_name != property_name
588
or (interface_name and prop._dbus_interface
589
and interface_name != prop._dbus_interface)):
590
continue
591
return prop
1276
for cls in self.__class__.__mro__:
1277
for name, value in inspect.getmembers(
1278
cls, self._is_dbus_thing("property")):
1279
if (value._dbus_name == property_name
1280
and value._dbus_interface == interface_name):
1281
return value.__get__(self)
1282
592
1283
# No such property
593
raise DBusPropertyNotFound(self.dbus_object_path + u":"
594
+ interface_name + u"."
595
+ property_name)
596
597
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
598
out_signature=u"v")
1284
raise DBusPropertyNotFound("{}:{}.{}".format(
1285
self.dbus_object_path, interface_name, property_name))
1286
1287
@classmethod
1288
def _get_all_interface_names(cls):
1289
"""Get a sequence of all interfaces supported by an object"""
1290
return (name for name in set(getattr(getattr(x, attr),
1291
"_dbus_interface", None)
1292
for x in (inspect.getmro(cls))
1293
for attr in dir(x))
1294
if name is not None)
1295
1296
@dbus.service.method(dbus.PROPERTIES_IFACE,
1297
in_signature="ss",
1298
out_signature="v")
599
1299
def Get(self, interface_name, property_name):
600
1300
"""Standard D-Bus property Get() method, see D-Bus standard.
601
1301
"""
602
1302
prop = self._get_dbus_property(interface_name, property_name)
603
if prop._dbus_access == u"write":
1303
if prop._dbus_access == "write":
604
1304
raise DBusPropertyAccessException(property_name)
605
1305
value = prop()
606
if not hasattr(value, u"variant_level"):
1306
if not hasattr(value, "variant_level"):
607
1307
return value
608
1308
return type(value)(value, variant_level=value.variant_level+1)
609
1309
610
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
1310
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
611
1311
def Set(self, interface_name, property_name, value):
612
1312
"""Standard D-Bus property Set() method, see D-Bus standard.
613
1313
"""
614
1314
prop = self._get_dbus_property(interface_name, property_name)
615
if prop._dbus_access == u"read":
1315
if prop._dbus_access == "read":
616
1316
raise DBusPropertyAccessException(property_name)
617
if prop._dbus_get_args_options[u"byte_arrays"]:
1317
if prop._dbus_get_args_options["byte_arrays"]:
618
1318
# The byte_arrays option is not supported yet on
619
1319
# signatures other than "ay".
620
if prop._dbus_signature != u"ay":
621
raise ValueError
622
value = dbus.ByteArray(''.join(unichr(byte)
623
for byte in value))
1320
if prop._dbus_signature != "ay":
1321
raise ValueError("Byte arrays not supported for non-"
1322
"'ay' signature {!r}"
1323
.format(prop._dbus_signature))
1324
value = dbus.ByteArray(b''.join(chr(byte)
1325
for byte in value))
624
1326
prop(value)
625
1327
626
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
627
out_signature=u"a{sv}")
1328
@dbus.service.method(dbus.PROPERTIES_IFACE,
1329
in_signature="s",
1330
out_signature="a{sv}")
628
1331
def GetAll(self, interface_name):
629
1332
"""Standard D-Bus property GetAll() method, see D-Bus
630
1333
standard.
631
1334
632
1335
Note: Will not include properties with access="write".
633
1336
"""
634
all = {}
635
for name, prop in self._get_all_dbus_properties():
1337
properties = {}
1338
for name, prop in self._get_all_dbus_things("property"):
636
1339
if (interface_name
637
1340
and interface_name != prop._dbus_interface):
638
1341
# Interface non-empty but did not match
639
1342
continue
640
1343
# Ignore write-only properties
641
if prop._dbus_access == u"write":
1344
if prop._dbus_access == "write":
642
1345
continue
643
1346
value = prop()
644
if not hasattr(value, u"variant_level"):
645
all[name] = value
1347
if not hasattr(value, "variant_level"):
1348
properties[name] = value
646
1349
continue
647
all[name] = type(value)(value, variant_level=
648
value.variant_level+1)
649
return dbus.Dictionary(all, signature=u"sv")
1350
properties[name] = type(value)(
1351
value, variant_level = value.variant_level + 1)
1352
return dbus.Dictionary(properties, signature="sv")
1353
1354
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1355
def PropertiesChanged(self, interface_name, changed_properties,
1356
invalidated_properties):
1357
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1358
standard.
1359
"""
1360
pass
650
1361
651
1362
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
652
out_signature=u"s",
1363
out_signature="s",
653
1364
path_keyword='object_path',
654
1365
connection_keyword='connection')
655
1366
def Introspect(self, object_path, connection):
656
"""Standard D-Bus method, overloaded to insert property tags.
1367
"""Overloading of standard D-Bus method.
1368
1369
Inserts property tags and interface annotation tags.
657
1370
"""
658
xmlstring = dbus.service.Object.Introspect(self, object_path,
659
connection)
1371
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1372
object_path,
1373
connection)
660
1374
try:
661
1375
document = xml.dom.minidom.parseString(xmlstring)
1376
662
1377
def make_tag(document, name, prop):
663
e = document.createElement(u"property")
664
e.setAttribute(u"name", name)
665
e.setAttribute(u"type", prop._dbus_signature)
666
e.setAttribute(u"access", prop._dbus_access)
1378
e = document.createElement("property")
1379
e.setAttribute("name", name)
1380
e.setAttribute("type", prop._dbus_signature)
1381
e.setAttribute("access", prop._dbus_access)
667
1382
return e
668
for if_tag in document.getElementsByTagName(u"interface"):
1383
1384
for if_tag in document.getElementsByTagName("interface"):
1385
# Add property tags
669
1386
for tag in (make_tag(document, name, prop)
670
1387
for name, prop
671
in self._get_all_dbus_properties()
1388
in self._get_all_dbus_things("property")
672
1389
if prop._dbus_interface
673
== if_tag.getAttribute(u"name")):
1390
== if_tag.getAttribute("name")):
674
1391
if_tag.appendChild(tag)
1392
# Add annotation tags for properties
1393
for tag in if_tag.getElementsByTagName("property"):
1394
annots = dict()
1395
for name, prop in self._get_all_dbus_things(
1396
"property"):
1397
if (name == tag.getAttribute("name")
1398
and prop._dbus_interface
1399
== if_tag.getAttribute("name")):
1400
annots.update(getattr(
1401
prop, "_dbus_annotations", {}))
1402
for name, value in annots.items():
1403
ann_tag = document.createElement(
1404
"annotation")
1405
ann_tag.setAttribute("name", name)
1406
ann_tag.setAttribute("value", value)
1407
tag.appendChild(ann_tag)
675
1408
# Add the names to the return values for the
676
1409
# "org.freedesktop.DBus.Properties" methods
677
if (if_tag.getAttribute(u"name")
678
== u"org.freedesktop.DBus.Properties"):
679
for cn in if_tag.getElementsByTagName(u"method"):
680
if cn.getAttribute(u"name") == u"Get":
681
for arg in cn.getElementsByTagName(u"arg"):
682
if (arg.getAttribute(u"direction")
683
== u"out"):
684
arg.setAttribute(u"name", u"value")
685
elif cn.getAttribute(u"name") == u"GetAll":
686
for arg in cn.getElementsByTagName(u"arg"):
687
if (arg.getAttribute(u"direction")
688
== u"out"):
689
arg.setAttribute(u"name", u"props")
690
xmlstring = document.toxml(u"utf-8")
691
document.unlink()
692
except (AttributeError, xml.dom.DOMException,
693
xml.parsers.expat.ExpatError), error:
694
logger.error(u"Failed to override Introspection method",
695
error)
696
return xmlstring
697
698
1410
if (if_tag.getAttribute("name")
1411
== "org.freedesktop.DBus.Properties"):
1412
for cn in if_tag.getElementsByTagName("method"):
1413
if cn.getAttribute("name") == "Get":
1414
for arg in cn.getElementsByTagName("arg"):
1415
if (arg.getAttribute("direction")
1416
== "out"):
1417
arg.setAttribute("name", "value")
1418
elif cn.getAttribute("name") == "GetAll":
1419
for arg in cn.getElementsByTagName("arg"):
1420
if (arg.getAttribute("direction")
1421
== "out"):
1422
arg.setAttribute("name", "props")
1423
xmlstring = document.toxml("utf-8")
1424
document.unlink()
1425
except (AttributeError, xml.dom.DOMException,
1426
xml.parsers.expat.ExpatError) as error:
1427
logger.error("Failed to override Introspection method",
1428
exc_info=error)
1429
return xmlstring
1430
1431
try:
1432
dbus.OBJECT_MANAGER_IFACE
1433
except AttributeError:
1434
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1435
1436
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1437
"""A D-Bus object with an ObjectManager.
1438
1439
Classes inheriting from this exposes the standard
1440
GetManagedObjects call and the InterfacesAdded and
1441
InterfacesRemoved signals on the standard
1442
"org.freedesktop.DBus.ObjectManager" interface.
1443
1444
Note: No signals are sent automatically; they must be sent
1445
manually.
1446
"""
1447
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1448
out_signature = "a{oa{sa{sv}}}")
1449
def GetManagedObjects(self):
1450
"""This function must be overridden"""
1451
raise NotImplementedError()
1452
1453
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1454
signature = "oa{sa{sv}}")
1455
def InterfacesAdded(self, object_path, interfaces_and_properties):
1456
pass
1457
1458
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1459
def InterfacesRemoved(self, object_path, interfaces):
1460
pass
1461
1462
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1463
out_signature = "s",
1464
path_keyword = 'object_path',
1465
connection_keyword = 'connection')
1466
def Introspect(self, object_path, connection):
1467
"""Overloading of standard D-Bus method.
1468
1469
Override return argument name of GetManagedObjects to be
1470
"objpath_interfaces_and_properties"
1471
"""
1472
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1473
object_path,
1474
connection)
1475
try:
1476
document = xml.dom.minidom.parseString(xmlstring)
1477
1478
for if_tag in document.getElementsByTagName("interface"):
1479
# Fix argument name for the GetManagedObjects method
1480
if (if_tag.getAttribute("name")
1481
== dbus.OBJECT_MANAGER_IFACE):
1482
for cn in if_tag.getElementsByTagName("method"):
1483
if (cn.getAttribute("name")
1484
== "GetManagedObjects"):
1485
for arg in cn.getElementsByTagName("arg"):
1486
if (arg.getAttribute("direction")
1487
== "out"):
1488
arg.setAttribute(
1489
"name",
1490
"objpath_interfaces"
1491
"_and_properties")
1492
xmlstring = document.toxml("utf-8")
1493
document.unlink()
1494
except (AttributeError, xml.dom.DOMException,
1495
xml.parsers.expat.ExpatError) as error:
1496
logger.error("Failed to override Introspection method",
1497
exc_info = error)
1498
return xmlstring
1499
1500
def datetime_to_dbus(dt, variant_level=0):
1501
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1502
if dt is None:
1503
return dbus.String("", variant_level = variant_level)
1504
return dbus.String(dt.isoformat(), variant_level=variant_level)
1505
1506
1507
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1508
"""A class decorator; applied to a subclass of
1509
dbus.service.Object, it will add alternate D-Bus attributes with
1510
interface names according to the "alt_interface_names" mapping.
1511
Usage:
1512
1513
@alternate_dbus_interfaces({"org.example.Interface":
1514
"net.example.AlternateInterface"})
1515
class SampleDBusObject(dbus.service.Object):
1516
@dbus.service.method("org.example.Interface")
1517
def SampleDBusMethod():
1518
pass
1519
1520
The above "SampleDBusMethod" on "SampleDBusObject" will be
1521
reachable via two interfaces: "org.example.Interface" and
1522
"net.example.AlternateInterface", the latter of which will have
1523
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1524
"true", unless "deprecate" is passed with a False value.
1525
1526
This works for methods and signals, and also for D-Bus properties
1527
(from DBusObjectWithProperties) and interfaces (from the
1528
dbus_interface_annotations decorator).
1529
"""
1530
1531
def wrapper(cls):
1532
for orig_interface_name, alt_interface_name in (
1533
alt_interface_names.items()):
1534
attr = {}
1535
interface_names = set()
1536
# Go though all attributes of the class
1537
for attrname, attribute in inspect.getmembers(cls):
1538
# Ignore non-D-Bus attributes, and D-Bus attributes
1539
# with the wrong interface name
1540
if (not hasattr(attribute, "_dbus_interface")
1541
or not attribute._dbus_interface.startswith(
1542
orig_interface_name)):
1543
continue
1544
# Create an alternate D-Bus interface name based on
1545
# the current name
1546
alt_interface = attribute._dbus_interface.replace(
1547
orig_interface_name, alt_interface_name)
1548
interface_names.add(alt_interface)
1549
# Is this a D-Bus signal?
1550
if getattr(attribute, "_dbus_is_signal", False):
1551
# Extract the original non-method undecorated
1552
# function by black magic
1553
if sys.version_info.major == 2:
1554
nonmethod_func = (dict(
1555
zip(attribute.func_code.co_freevars,
1556
attribute.__closure__))
1557
["func"].cell_contents)
1558
else:
1559
nonmethod_func = (dict(
1560
zip(attribute.__code__.co_freevars,
1561
attribute.__closure__))
1562
["func"].cell_contents)
1563
# Create a new, but exactly alike, function
1564
# object, and decorate it to be a new D-Bus signal
1565
# with the alternate D-Bus interface name
1566
new_function = copy_function(nonmethod_func)
1567
new_function = (dbus.service.signal(
1568
alt_interface,
1569
attribute._dbus_signature)(new_function))
1570
# Copy annotations, if any
1571
try:
1572
new_function._dbus_annotations = dict(
1573
attribute._dbus_annotations)
1574
except AttributeError:
1575
pass
1576
# Define a creator of a function to call both the
1577
# original and alternate functions, so both the
1578
# original and alternate signals gets sent when
1579
# the function is called
1580
def fixscope(func1, func2):
1581
"""This function is a scope container to pass
1582
func1 and func2 to the "call_both" function
1583
outside of its arguments"""
1584
1585
@functools.wraps(func2)
1586
def call_both(*args, **kwargs):
1587
"""This function will emit two D-Bus
1588
signals by calling func1 and func2"""
1589
func1(*args, **kwargs)
1590
func2(*args, **kwargs)
1591
# Make wrapper function look like a D-Bus signal
1592
for name, attr in inspect.getmembers(func2):
1593
if name.startswith("_dbus_"):
1594
setattr(call_both, name, attr)
1595
1596
return call_both
1597
# Create the "call_both" function and add it to
1598
# the class
1599
attr[attrname] = fixscope(attribute, new_function)
1600
# Is this a D-Bus method?
1601
elif getattr(attribute, "_dbus_is_method", False):
1602
# Create a new, but exactly alike, function
1603
# object. Decorate it to be a new D-Bus method
1604
# with the alternate D-Bus interface name. Add it
1605
# to the class.
1606
attr[attrname] = (
1607
dbus.service.method(
1608
alt_interface,
1609
attribute._dbus_in_signature,
1610
attribute._dbus_out_signature)
1611
(copy_function(attribute)))
1612
# Copy annotations, if any
1613
try:
1614
attr[attrname]._dbus_annotations = dict(
1615
attribute._dbus_annotations)
1616
except AttributeError:
1617
pass
1618
# Is this a D-Bus property?
1619
elif getattr(attribute, "_dbus_is_property", False):
1620
# Create a new, but exactly alike, function
1621
# object, and decorate it to be a new D-Bus
1622
# property with the alternate D-Bus interface
1623
# name. Add it to the class.
1624
attr[attrname] = (dbus_service_property(
1625
alt_interface, attribute._dbus_signature,
1626
attribute._dbus_access,
1627
attribute._dbus_get_args_options
1628
["byte_arrays"])
1629
(copy_function(attribute)))
1630
# Copy annotations, if any
1631
try:
1632
attr[attrname]._dbus_annotations = dict(
1633
attribute._dbus_annotations)
1634
except AttributeError:
1635
pass
1636
# Is this a D-Bus interface?
1637
elif getattr(attribute, "_dbus_is_interface", False):
1638
# Create a new, but exactly alike, function
1639
# object. Decorate it to be a new D-Bus interface
1640
# with the alternate D-Bus interface name. Add it
1641
# to the class.
1642
attr[attrname] = (
1643
dbus_interface_annotations(alt_interface)
1644
(copy_function(attribute)))
1645
if deprecate:
1646
# Deprecate all alternate interfaces
1647
iname="_AlternateDBusNames_interface_annotation{}"
1648
for interface_name in interface_names:
1649
1650
@dbus_interface_annotations(interface_name)
1651
def func(self):
1652
return { "org.freedesktop.DBus.Deprecated":
1653
"true" }
1654
# Find an unused name
1655
for aname in (iname.format(i)
1656
for i in itertools.count()):
1657
if aname not in attr:
1658
attr[aname] = func
1659
break
1660
if interface_names:
1661
# Replace the class with a new subclass of it with
1662
# methods, signals, etc. as created above.
1663
if sys.version_info.major == 2:
1664
cls = type(b"{}Alternate".format(cls.__name__),
1665
(cls, ), attr)
1666
else:
1667
cls = type("{}Alternate".format(cls.__name__),
1668
(cls, ), attr)
1669
return cls
1670
1671
return wrapper
1672
1673
1674
@alternate_dbus_interfaces({"se.recompile.Mandos":
1675
"se.bsnet.fukt.Mandos"})
699
1676
class ClientDBus(Client, DBusObjectWithProperties):
700
1677
"""A Client class using D-Bus
701
1678
703
1680
dbus_object_path: dbus.ObjectPath
704
1681
bus: dbus.SystemBus()
705
1682
"""
1683
1684
runtime_expansions = (Client.runtime_expansions
1685
+ ("dbus_object_path", ))
1686
1687
_interface = "se.recompile.Mandos.Client"
1688
706
1689
# dbus.service.Object doesn't use super(), so we can't either.
707
1690
708
1691
def __init__(self, bus = None, *args, **kwargs):
709
self._approvals_pending = 0
710
1692
self.bus = bus
711
1693
Client.__init__(self, *args, **kwargs)
712
1694
# Only now, when this client is initialized, can it show up on
713
1695
# the D-Bus
714
self.dbus_object_path = (dbus.ObjectPath
715
(u"/clients/"
716
+ self.name.replace(u".", u"_")))
1696
client_object_name = str(self.name).translate(
1697
{ord("."): ord("_"),
1698
ord("-"): ord("_")})
1699
self.dbus_object_path = dbus.ObjectPath(
1700
"/clients/" + client_object_name)
717
1701
DBusObjectWithProperties.__init__(self, self.bus,
718
1702
self.dbus_object_path)
719
720
def _get_approvals_pending(self):
721
return self._approvals_pending
722
def _set_approvals_pending(self, value):
723
old_value = self._approvals_pending
724
self._approvals_pending = value
725
bval = bool(value)
726
if (hasattr(self, "dbus_object_path")
727
and bval is not bool(old_value)):
728
dbus_bool = dbus.Boolean(bval, variant_level=1)
729
self.PropertyChanged(dbus.String(u"ApprovalPending"),
730
dbus_bool)
731
732
approvals_pending = property(_get_approvals_pending,
733
_set_approvals_pending)
734
del _get_approvals_pending, _set_approvals_pending
735
736
@staticmethod
737
def _datetime_to_dbus(dt, variant_level=0):
738
"""Convert a UTC datetime.datetime() to a D-Bus type."""
739
return dbus.String(dt.isoformat(),
740
variant_level=variant_level)
741
742
def enable(self):
743
oldstate = getattr(self, u"enabled", False)
744
r = Client.enable(self)
745
if oldstate != self.enabled:
746
# Emit D-Bus signals
747
self.PropertyChanged(dbus.String(u"Enabled"),
748
dbus.Boolean(True, variant_level=1))
749
self.PropertyChanged(
750
dbus.String(u"LastEnabled"),
751
self._datetime_to_dbus(self.last_enabled,
752
variant_level=1))
753
return r
754
755
def disable(self, quiet = False):
756
oldstate = getattr(self, u"enabled", False)
757
r = Client.disable(self, quiet=quiet)
758
if not quiet and oldstate != self.enabled:
759
# Emit D-Bus signal
760
self.PropertyChanged(dbus.String(u"Enabled"),
761
dbus.Boolean(False, variant_level=1))
762
return r
1703
1704
def notifychangeproperty(transform_func, dbus_name,
1705
type_func=lambda x: x,
1706
variant_level=1,
1707
invalidate_only=False,
1708
_interface=_interface):
1709
""" Modify a variable so that it's a property which announces
1710
its changes to DBus.
1711
1712
transform_fun: Function that takes a value and a variant_level
1713
and transforms it to a D-Bus type.
1714
dbus_name: D-Bus name of the variable
1715
type_func: Function that transform the value before sending it
1716
to the D-Bus. Default: no transform
1717
variant_level: D-Bus variant level. Default: 1
1718
"""
1719
attrname = "_{}".format(dbus_name)
1720
1721
def setter(self, value):
1722
if hasattr(self, "dbus_object_path"):
1723
if (not hasattr(self, attrname) or
1724
type_func(getattr(self, attrname, None))
1725
!= type_func(value)):
1726
if invalidate_only:
1727
self.PropertiesChanged(
1728
_interface, dbus.Dictionary(),
1729
dbus.Array((dbus_name, )))
1730
else:
1731
dbus_value = transform_func(
1732
type_func(value),
1733
variant_level = variant_level)
1734
self.PropertyChanged(dbus.String(dbus_name),
1735
dbus_value)
1736
self.PropertiesChanged(
1737
_interface,
1738
dbus.Dictionary({ dbus.String(dbus_name):
1739
dbus_value }),
1740
dbus.Array())
1741
setattr(self, attrname, value)
1742
1743
return property(lambda self: getattr(self, attrname), setter)
1744
1745
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1746
approvals_pending = notifychangeproperty(dbus.Boolean,
1747
"ApprovalPending",
1748
type_func = bool)
1749
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1750
last_enabled = notifychangeproperty(datetime_to_dbus,
1751
"LastEnabled")
1752
checker = notifychangeproperty(
1753
dbus.Boolean, "CheckerRunning",
1754
type_func = lambda checker: checker is not None)
1755
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1756
"LastCheckedOK")
1757
last_checker_status = notifychangeproperty(dbus.Int16,
1758
"LastCheckerStatus")
1759
last_approval_request = notifychangeproperty(
1760
datetime_to_dbus, "LastApprovalRequest")
1761
approved_by_default = notifychangeproperty(dbus.Boolean,
1762
"ApprovedByDefault")
1763
approval_delay = notifychangeproperty(
1764
dbus.UInt64, "ApprovalDelay",
1765
type_func = lambda td: td.total_seconds() * 1000)
1766
approval_duration = notifychangeproperty(
1767
dbus.UInt64, "ApprovalDuration",
1768
type_func = lambda td: td.total_seconds() * 1000)
1769
host = notifychangeproperty(dbus.String, "Host")
1770
timeout = notifychangeproperty(
1771
dbus.UInt64, "Timeout",
1772
type_func = lambda td: td.total_seconds() * 1000)
1773
extended_timeout = notifychangeproperty(
1774
dbus.UInt64, "ExtendedTimeout",
1775
type_func = lambda td: td.total_seconds() * 1000)
1776
interval = notifychangeproperty(
1777
dbus.UInt64, "Interval",
1778
type_func = lambda td: td.total_seconds() * 1000)
1779
checker_command = notifychangeproperty(dbus.String, "Checker")
1780
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1781
invalidate_only=True)
1782
1783
del notifychangeproperty
763
1784
764
1785
def __del__(self, *args, **kwargs):
765
1786
try:
766
1787
self.remove_from_connection()
767
1788
except LookupError:
768
1789
pass
769
if hasattr(DBusObjectWithProperties, u"__del__"):
1790
if hasattr(DBusObjectWithProperties, "__del__"):
770
1791
DBusObjectWithProperties.__del__(self, *args, **kwargs)
771
1792
Client.__del__(self, *args, **kwargs)
772
1793
773
def checker_callback(self, pid, condition, command,
774
*args, **kwargs):
775
self.checker_callback_tag = None
776
self.checker = None
777
# Emit D-Bus signal
778
self.PropertyChanged(dbus.String(u"CheckerRunning"),
779
dbus.Boolean(False, variant_level=1))
780
if os.WIFEXITED(condition):
781
exitstatus = os.WEXITSTATUS(condition)
1794
def checker_callback(self, source, condition,
1795
connection, command, *args, **kwargs):
1796
ret = Client.checker_callback(self, source, condition,
1797
connection, command, *args,
1798
**kwargs)
1799
exitstatus = self.last_checker_status
1800
if exitstatus >= 0:
782
1801
# Emit D-Bus signal
783
1802
self.CheckerCompleted(dbus.Int16(exitstatus),
784
dbus.Int64(condition),
1803
# This is specific to GNU libC
1804
dbus.Int64(exitstatus << 8),
785
1805
dbus.String(command))
786
1806
else:
787
1807
# Emit D-Bus signal
788
1808
self.CheckerCompleted(dbus.Int16(-1),
789
dbus.Int64(condition),
1809
dbus.Int64(
1810
# This is specific to GNU libC
1811
(exitstatus << 8)
1812
| self.last_checker_signal),
790
1813
dbus.String(command))
791
792
return Client.checker_callback(self, pid, condition, command,
793
*args, **kwargs)
794
795
def checked_ok(self, *args, **kwargs):
796
r = Client.checked_ok(self, *args, **kwargs)
797
# Emit D-Bus signal
798
self.PropertyChanged(
799
dbus.String(u"LastCheckedOK"),
800
(self._datetime_to_dbus(self.last_checked_ok,
801
variant_level=1)))
802
return r
1814
return ret
803
1815
804
1816
def start_checker(self, *args, **kwargs):
805
old_checker = self.checker
806
if self.checker is not None:
807
old_checker_pid = self.checker.pid
808
else:
809
old_checker_pid = None
1817
old_checker_pid = getattr(self.checker, "pid", None)
810
1818
r = Client.start_checker(self, *args, **kwargs)
811
1819
# Only if new checker process was started
812
1820
if (self.checker is not None
813
1821
and old_checker_pid != self.checker.pid):
814
1822
# Emit D-Bus signal
815
1823
self.CheckerStarted(self.current_checker_command)
816
self.PropertyChanged(
817
dbus.String(u"CheckerRunning"),
818
dbus.Boolean(True, variant_level=1))
819
1824
return r
820
1825
821
def stop_checker(self, *args, **kwargs):
822
old_checker = getattr(self, u"checker", None)
823
r = Client.stop_checker(self, *args, **kwargs)
824
if (old_checker is not None
825
and getattr(self, u"checker", None) is None):
826
self.PropertyChanged(dbus.String(u"CheckerRunning"),
827
dbus.Boolean(False, variant_level=1))
828
return r
829
830
1826
def _reset_approved(self):
831
self._approved = None
1827
self.approved = None
832
1828
return False
833
1829
834
1830
def approve(self, value=True):
1831
self.approved = value
1832
GLib.timeout_add(int(self.approval_duration.total_seconds()
1833
* 1000), self._reset_approved)
835
1834
self.send_changedstate()
836
self._approved = value
837
gobject.timeout_add(self._timedelta_to_milliseconds
838
(self.approval_duration),
839
self._reset_approved)
840
841
1835
842
1836
## D-Bus methods, signals & properties
843
_interface = u"se.bsnet.fukt.Mandos.Client"
1837
1838
## Interfaces
844
1839
845
1840
## Signals
846
1841
847
1842
# CheckerCompleted - signal
848
@dbus.service.signal(_interface, signature=u"nxs")
1843
@dbus.service.signal(_interface, signature="nxs")
849
1844
def CheckerCompleted(self, exitcode, waitstatus, command):
850
1845
"D-Bus signal"
851
1846
pass
852
1847
853
1848
# CheckerStarted - signal
854
@dbus.service.signal(_interface, signature=u"s")
1849
@dbus.service.signal(_interface, signature="s")
855
1850
def CheckerStarted(self, command):
856
1851
"D-Bus signal"
857
1852
pass
858
1853
859
1854
# PropertyChanged - signal
860
@dbus.service.signal(_interface, signature=u"sv")
1855
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1856
@dbus.service.signal(_interface, signature="sv")
861
1857
def PropertyChanged(self, property, value):
862
1858
"D-Bus signal"
863
1859
pass
872
1868
pass
873
1869
874
1870
# Rejected - signal
875
@dbus.service.signal(_interface, signature=u"s")
1871
@dbus.service.signal(_interface, signature="s")
876
1872
def Rejected(self, reason):
877
1873
"D-Bus signal"
878
1874
pass
879
1875
880
1876
# NeedApproval - signal
881
@dbus.service.signal(_interface, signature=u"tb")
1877
@dbus.service.signal(_interface, signature="tb")
882
1878
def NeedApproval(self, timeout, default):
883
1879
"D-Bus signal"
884
pass
1880
return self.need_approval()
885
1881
886
1882
## Methods
887
1883
888
1884
# Approve - method
889
@dbus.service.method(_interface, in_signature=u"b")
1885
@dbus.service.method(_interface, in_signature="b")
890
1886
def Approve(self, value):
891
1887
self.approve(value)
892
1888
893
1889
# CheckedOK - method
894
1890
@dbus.service.method(_interface)
895
1891
def CheckedOK(self):
896
return self.checked_ok()
1892
self.checked_ok()
897
1893
898
1894
# Enable - method
1895
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
899
1896
@dbus.service.method(_interface)
900
1897
def Enable(self):
901
1898
"D-Bus method"
902
1899
self.enable()
903
1900
904
1901
# StartChecker - method
1902
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
905
1903
@dbus.service.method(_interface)
906
1904
def StartChecker(self):
907
1905
"D-Bus method"
908
1906
self.start_checker()
909
1907
910
1908
# Disable - method
1909
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
911
1910
@dbus.service.method(_interface)
912
1911
def Disable(self):
913
1912
"D-Bus method"
914
1913
self.disable()
915
1914
916
1915
# StopChecker - method
1916
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
917
1917
@dbus.service.method(_interface)
918
1918
def StopChecker(self):
919
1919
self.stop_checker()
921
1921
## Properties
922
1922
923
1923
# ApprovalPending - property
924
@dbus_service_property(_interface, signature=u"b", access=u"read")
1924
@dbus_service_property(_interface, signature="b", access="read")
925
1925
def ApprovalPending_dbus_property(self):
926
1926
return dbus.Boolean(bool(self.approvals_pending))
927
1927
928
1928
# ApprovedByDefault - property
929
@dbus_service_property(_interface, signature=u"b",
930
access=u"readwrite")
1929
@dbus_service_property(_interface,
1930
signature="b",
1931
access="readwrite")
931
1932
def ApprovedByDefault_dbus_property(self, value=None):
932
1933
if value is None: # get
933
1934
return dbus.Boolean(self.approved_by_default)
934
1935
self.approved_by_default = bool(value)
935
# Emit D-Bus signal
936
self.PropertyChanged(dbus.String(u"ApprovedByDefault"),
937
dbus.Boolean(value, variant_level=1))
938
1936
939
1937
# ApprovalDelay - property
940
@dbus_service_property(_interface, signature=u"t",
941
access=u"readwrite")
1938
@dbus_service_property(_interface,
1939
signature="t",
1940
access="readwrite")
942
1941
def ApprovalDelay_dbus_property(self, value=None):
943
1942
if value is None: # get
944
return dbus.UInt64(self.approval_delay_milliseconds())
1943
return dbus.UInt64(self.approval_delay.total_seconds()
1944
* 1000)
945
1945
self.approval_delay = datetime.timedelta(0, 0, 0, value)
946
# Emit D-Bus signal
947
self.PropertyChanged(dbus.String(u"ApprovalDelay"),
948
dbus.UInt64(value, variant_level=1))
949
1946
950
1947
# ApprovalDuration - property
951
@dbus_service_property(_interface, signature=u"t",
952
access=u"readwrite")
1948
@dbus_service_property(_interface,
1949
signature="t",
1950
access="readwrite")
953
1951
def ApprovalDuration_dbus_property(self, value=None):
954
1952
if value is None: # get
955
return dbus.UInt64(self._timedelta_to_milliseconds(
956
self.approval_duration))
1953
return dbus.UInt64(self.approval_duration.total_seconds()
1954
* 1000)
957
1955
self.approval_duration = datetime.timedelta(0, 0, 0, value)
958
# Emit D-Bus signal
959
self.PropertyChanged(dbus.String(u"ApprovalDuration"),
960
dbus.UInt64(value, variant_level=1))
961
1956
962
1957
# Name - property
963
@dbus_service_property(_interface, signature=u"s", access=u"read")
1958
@dbus_annotations(
1959
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1960
@dbus_service_property(_interface, signature="s", access="read")
964
1961
def Name_dbus_property(self):
965
1962
return dbus.String(self.name)
966
1963
967
1964
# Fingerprint - property
968
@dbus_service_property(_interface, signature=u"s", access=u"read")
1965
@dbus_annotations(
1966
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1967
@dbus_service_property(_interface, signature="s", access="read")
969
1968
def Fingerprint_dbus_property(self):
970
1969
return dbus.String(self.fingerprint)
971
1970
972
1971
# Host - property
973
@dbus_service_property(_interface, signature=u"s",
974
access=u"readwrite")
1972
@dbus_service_property(_interface,
1973
signature="s",
1974
access="readwrite")
975
1975
def Host_dbus_property(self, value=None):
976
1976
if value is None: # get
977
1977
return dbus.String(self.host)
978
self.host = value
979
# Emit D-Bus signal
980
self.PropertyChanged(dbus.String(u"Host"),
981
dbus.String(value, variant_level=1))
1978
self.host = str(value)
982
1979
983
1980
# Created - property
984
@dbus_service_property(_interface, signature=u"s", access=u"read")
1981
@dbus_annotations(
1982
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1983
@dbus_service_property(_interface, signature="s", access="read")
985
1984
def Created_dbus_property(self):
986
return dbus.String(self._datetime_to_dbus(self.created))
1985
return datetime_to_dbus(self.created)
987
1986
988
1987
# LastEnabled - property
989
@dbus_service_property(_interface, signature=u"s", access=u"read")
1988
@dbus_service_property(_interface, signature="s", access="read")
990
1989
def LastEnabled_dbus_property(self):
991
if self.last_enabled is None:
992
return dbus.String(u"")
993
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1990
return datetime_to_dbus(self.last_enabled)
994
1991
995
1992
# Enabled - property
996
@dbus_service_property(_interface, signature=u"b",
997
access=u"readwrite")
1993
@dbus_service_property(_interface,
1994
signature="b",
1995
access="readwrite")
998
1996
def Enabled_dbus_property(self, value=None):
999
1997
if value is None: # get
1000
1998
return dbus.Boolean(self.enabled)
1004
2002
self.disable()
1005
2003
1006
2004
# LastCheckedOK - property
1007
@dbus_service_property(_interface, signature=u"s",
1008
access=u"readwrite")
2005
@dbus_service_property(_interface,
2006
signature="s",
2007
access="readwrite")
1009
2008
def LastCheckedOK_dbus_property(self, value=None):
1010
2009
if value is not None:
1011
2010
self.checked_ok()
1012
2011
return
1013
if self.last_checked_ok is None:
1014
return dbus.String(u"")
1015
return dbus.String(self._datetime_to_dbus(self
1016
.last_checked_ok))
2012
return datetime_to_dbus(self.last_checked_ok)
2013
2014
# LastCheckerStatus - property
2015
@dbus_service_property(_interface, signature="n", access="read")
2016
def LastCheckerStatus_dbus_property(self):
2017
return dbus.Int16(self.last_checker_status)
2018
2019
# Expires - property
2020
@dbus_service_property(_interface, signature="s", access="read")
2021
def Expires_dbus_property(self):
2022
return datetime_to_dbus(self.expires)
2023
2024
# LastApprovalRequest - property
2025
@dbus_service_property(_interface, signature="s", access="read")
2026
def LastApprovalRequest_dbus_property(self):
2027
return datetime_to_dbus(self.last_approval_request)
1017
2028
1018
2029
# Timeout - property
1019
@dbus_service_property(_interface, signature=u"t",
1020
access=u"readwrite")
2030
@dbus_service_property(_interface,
2031
signature="t",
2032
access="readwrite")
1021
2033
def Timeout_dbus_property(self, value=None):
1022
2034
if value is None: # get
1023
return dbus.UInt64(self.timeout_milliseconds())
2035
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2036
old_timeout = self.timeout
1024
2037
self.timeout = datetime.timedelta(0, 0, 0, value)
1025
# Emit D-Bus signal
1026
self.PropertyChanged(dbus.String(u"Timeout"),
1027
dbus.UInt64(value, variant_level=1))
1028
if getattr(self, u"disable_initiator_tag", None) is None:
1029
return
1030
# Reschedule timeout
1031
gobject.source_remove(self.disable_initiator_tag)
1032
self.disable_initiator_tag = None
1033
time_to_die = (self.
1034
_timedelta_to_milliseconds((self
1035
.last_checked_ok
1036
+ self.timeout)
1037
- datetime.datetime
1038
.utcnow()))
1039
if time_to_die <= 0:
1040
# The timeout has passed
1041
self.disable()
1042
else:
1043
self.disable_initiator_tag = (gobject.timeout_add
1044
(time_to_die, self.disable))
2038
# Reschedule disabling
2039
if self.enabled:
2040
now = datetime.datetime.utcnow()
2041
self.expires += self.timeout - old_timeout
2042
if self.expires <= now:
2043
# The timeout has passed
2044
self.disable()
2045
else:
2046
if (getattr(self, "disable_initiator_tag", None)
2047
is None):
2048
return
2049
GLib.source_remove(self.disable_initiator_tag)
2050
self.disable_initiator_tag = GLib.timeout_add(
2051
int((self.expires - now).total_seconds() * 1000),
2052
self.disable)
2053
2054
# ExtendedTimeout - property
2055
@dbus_service_property(_interface,
2056
signature="t",
2057
access="readwrite")
2058
def ExtendedTimeout_dbus_property(self, value=None):
2059
if value is None: # get
2060
return dbus.UInt64(self.extended_timeout.total_seconds()
2061
* 1000)
2062
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1045
2063
1046
2064
# Interval - property
1047
@dbus_service_property(_interface, signature=u"t",
1048
access=u"readwrite")
2065
@dbus_service_property(_interface,
2066
signature="t",
2067
access="readwrite")
1049
2068
def Interval_dbus_property(self, value=None):
1050
2069
if value is None: # get
1051
return dbus.UInt64(self.interval_milliseconds())
2070
return dbus.UInt64(self.interval.total_seconds() * 1000)
1052
2071
self.interval = datetime.timedelta(0, 0, 0, value)
1053
# Emit D-Bus signal
1054
self.PropertyChanged(dbus.String(u"Interval"),
1055
dbus.UInt64(value, variant_level=1))
1056
if getattr(self, u"checker_initiator_tag", None) is None:
2072
if getattr(self, "checker_initiator_tag", None) is None:
1057
2073
return
1058
# Reschedule checker run
1059
gobject.source_remove(self.checker_initiator_tag)
1060
self.checker_initiator_tag = (gobject.timeout_add
1061
(value, self.start_checker))
1062
self.start_checker() # Start one now, too
1063
2074
if self.enabled:
2075
# Reschedule checker run
2076
GLib.source_remove(self.checker_initiator_tag)
2077
self.checker_initiator_tag = GLib.timeout_add(
2078
value, self.start_checker)
2079
self.start_checker() # Start one now, too
2080
1064
2081
# Checker - property
1065
@dbus_service_property(_interface, signature=u"s",
1066
access=u"readwrite")
2082
@dbus_service_property(_interface,
2083
signature="s",
2084
access="readwrite")
1067
2085
def Checker_dbus_property(self, value=None):
1068
2086
if value is None: # get
1069
2087
return dbus.String(self.checker_command)
1070
self.checker_command = value
1071
# Emit D-Bus signal
1072
self.PropertyChanged(dbus.String(u"Checker"),
1073
dbus.String(self.checker_command,
1074
variant_level=1))
2088
self.checker_command = str(value)
1075
2089
1076
2090
# CheckerRunning - property
1077
@dbus_service_property(_interface, signature=u"b",
1078
access=u"readwrite")
2091
@dbus_service_property(_interface,
2092
signature="b",
2093
access="readwrite")
1079
2094
def CheckerRunning_dbus_property(self, value=None):
1080
2095
if value is None: # get
1081
2096
return dbus.Boolean(self.checker is not None)
1085
2100
self.stop_checker()
1086
2101
1087
2102
# ObjectPath - property
1088
@dbus_service_property(_interface, signature=u"o", access=u"read")
2103
@dbus_annotations(
2104
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2105
"org.freedesktop.DBus.Deprecated": "true"})
2106
@dbus_service_property(_interface, signature="o", access="read")
1089
2107
def ObjectPath_dbus_property(self):
1090
2108
return self.dbus_object_path # is already a dbus.ObjectPath
1091
2109
1092
2110
# Secret = property
1093
@dbus_service_property(_interface, signature=u"ay",
1094
access=u"write", byte_arrays=True)
2111
@dbus_annotations(
2112
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2113
"invalidates"})
2114
@dbus_service_property(_interface,
2115
signature="ay",
2116
access="write",
2117
byte_arrays=True)
1095
2118
def Secret_dbus_property(self, value):
1096
self.secret = str(value)
2119
self.secret = bytes(value)
1097
2120
1098
2121
del _interface
1099
2122
1103
2126
self._pipe = child_pipe
1104
2127
self._pipe.send(('init', fpr, address))
1105
2128
if not self._pipe.recv():
1106
raise KeyError()
1107
2129
raise KeyError(fpr)
2130
1108
2131
def __getattribute__(self, name):
1109
if(name == '_pipe'):
2132
if name == '_pipe':
1110
2133
return super(ProxyClient, self).__getattribute__(name)
1111
2134
self._pipe.send(('getattr', name))
1112
2135
data = self._pipe.recv()
1113
2136
if data[0] == 'data':
1114
2137
return data[1]
1115
2138
if data[0] == 'function':
2139
1116
2140
def func(*args, **kwargs):
1117
2141
self._pipe.send(('funcall', name, args, kwargs))
1118
2142
return self._pipe.recv()[1]
2143
1119
2144
return func
1120
2145
1121
2146
def __setattr__(self, name, value):
1122
if(name == '_pipe'):
2147
if name == '_pipe':
1123
2148
return super(ProxyClient, self).__setattr__(name, value)
1124
2149
self._pipe.send(('setattr', name, value))
1125
2150
1132
2157
1133
2158
def handle(self):
1134
2159
with contextlib.closing(self.server.child_pipe) as child_pipe:
1135
logger.info(u"TCP connection from: %s",
1136
unicode(self.client_address))
1137
logger.debug(u"Pipe FD: %d",
2160
logger.info("TCP connection from: %s",
2161
str(self.client_address))
2162
logger.debug("Pipe FD: %d",
1138
2163
self.server.child_pipe.fileno())
1139
1140
session = (gnutls.connection
1141
.ClientSession(self.request,
1142
gnutls.connection
1143
.X509Credentials()))
1144
1145
# Note: gnutls.connection.X509Credentials is really a
1146
# generic GnuTLS certificate credentials object so long as
1147
# no X.509 keys are added to it. Therefore, we can use it
1148
# here despite using OpenPGP certificates.
1149
1150
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1151
# u"+AES-256-CBC", u"+SHA1",
1152
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1153
# u"+DHE-DSS"))
2164
2165
session = gnutls.ClientSession(self.request)
2166
2167
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
2168
# "+AES-256-CBC", "+SHA1",
2169
# "+COMP-NULL", "+CTYPE-OPENPGP",
2170
# "+DHE-DSS"))
1154
2171
# Use a fallback default, since this MUST be set.
1155
2172
priority = self.server.gnutls_priority
1156
2173
if priority is None:
1157
priority = u"NORMAL"
1158
(gnutls.library.functions
1159
.gnutls_priority_set_direct(session._c_object,
1160
priority, None))
1161
2174
priority = "NORMAL"
2175
gnutls.priority_set_direct(session._c_object, priority,
2176
None)
2177
1162
2178
# Start communication using the Mandos protocol
1163
2179
# Get protocol number
1164
2180
line = self.request.makefile().readline()
1165
logger.debug(u"Protocol version: %r", line)
2181
logger.debug("Protocol version: %r", line)
1166
2182
try:
1167
2183
if int(line.strip().split()[0]) > 1:
1168
raise RuntimeError
1169
except (ValueError, IndexError, RuntimeError), error:
1170
logger.error(u"Unknown protocol version: %s", error)
2184
raise RuntimeError(line)
2185
except (ValueError, IndexError, RuntimeError) as error:
2186
logger.error("Unknown protocol version: %s", error)
1171
2187
return
1172
2188
1173
2189
# Start GnuTLS connection
1174
2190
try:
1175
2191
session.handshake()
1176
except gnutls.errors.GNUTLSError, error:
1177
logger.warning(u"Handshake failed: %s", error)
2192
except gnutls.Error as error:
2193
logger.warning("Handshake failed: %s", error)
1178
2194
# Do not run session.bye() here: the session is not
1179
2195
# established. Just abandon the request.
1180
2196
return
1181
logger.debug(u"Handshake succeeded")
1182
2197
logger.debug("Handshake succeeded")
2198
1183
2199
approval_required = False
1184
2200
try:
1185
2201
try:
1186
fpr = self.fingerprint(self.peer_certificate
1187
(session))
1188
except (TypeError, gnutls.errors.GNUTLSError), error:
1189
logger.warning(u"Bad certificate: %s", error)
2202
fpr = self.fingerprint(
2203
self.peer_certificate(session))
2204
except (TypeError, gnutls.Error) as error:
2205
logger.warning("Bad certificate: %s", error)
1190
2206
return
1191
logger.debug(u"Fingerprint: %s", fpr)
1192
2207
logger.debug("Fingerprint: %s", fpr)
2208
1193
2209
try:
1194
2210
client = ProxyClient(child_pipe, fpr,
1195
2211
self.client_address)
1203
2219
1204
2220
while True:
1205
2221
if not client.enabled:
1206
logger.warning(u"Client %s is disabled",
1207
client.name)
2222
logger.info("Client %s is disabled",
2223
client.name)
1208
2224
if self.server.use_dbus:
1209
2225
# Emit D-Bus signal
1210
client.Rejected("Disabled")
2226
client.Rejected("Disabled")
1211
2227
return
1212
2228
1213
if client._approved or not client.approval_delay:
2229
if client.approved or not client.approval_delay:
1214
2230
#We are approved or approval is disabled
1215
2231
break
1216
elif client._approved is None:
1217
logger.info(u"Client %s needs approval",
2232
elif client.approved is None:
2233
logger.info("Client %s needs approval",
1218
2234
client.name)
1219
2235
if self.server.use_dbus:
1220
2236
# Emit D-Bus signal
1221
2237
client.NeedApproval(
1222
client.approval_delay_milliseconds(),
1223
client.approved_by_default)
2238
client.approval_delay.total_seconds()
2239
* 1000, client.approved_by_default)
1224
2240
else:
1225
logger.warning(u"Client %s was not approved",
2241
logger.warning("Client %s was not approved",
1226
2242
client.name)
1227
2243
if self.server.use_dbus:
1228
2244
# Emit D-Bus signal
1230
2246
return
1231
2247
1232
2248
#wait until timeout or approved
1233
#x = float(client._timedelta_to_milliseconds(delay))
1234
2249
time = datetime.datetime.now()
1235
2250
client.changedstate.acquire()
1236
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
2251
client.changedstate.wait(delay.total_seconds())
1237
2252
client.changedstate.release()
1238
2253
time2 = datetime.datetime.now()
1239
2254
if (time2 - time) >= delay:
1243
2258
client.name)
1244
2259
if self.server.use_dbus:
1245
2260
# Emit D-Bus signal
1246
client.Rejected("Timed out")
2261
client.Rejected("Approval timed out")
1247
2262
return
1248
2263
else:
1249
2264
break
1250
2265
else:
1251
2266
delay -= time2 - time
1252
2267
1253
sent_size = 0
1254
while sent_size < len(client.secret):
1255
try:
1256
sent = session.send(client.secret[sent_size:])
1257
except (gnutls.errors.GNUTLSError), error:
1258
logger.warning("gnutls send failed")
1259
return
1260
logger.debug(u"Sent: %d, remaining: %d",
1261
sent, len(client.secret)
1262
- (sent_size + sent))
1263
sent_size += sent
1264
1265
logger.info(u"Sending secret to %s", client.name)
1266
# bump the timeout as if seen
1267
client.checked_ok()
2268
try:
2269
session.send(client.secret)
2270
except gnutls.Error as error:
2271
logger.warning("gnutls send failed",
2272
exc_info = error)
2273
return
2274
2275
logger.info("Sending secret to %s", client.name)
2276
# bump the timeout using extended_timeout
2277
client.bump_timeout(client.extended_timeout)
1268
2278
if self.server.use_dbus:
1269
2279
# Emit D-Bus signal
1270
2280
client.GotSecret()
1274
2284
client.approvals_pending -= 1
1275
2285
try:
1276
2286
session.bye()
1277
except (gnutls.errors.GNUTLSError), error:
1278
logger.warning("GnuTLS bye failed")
2287
except gnutls.Error as error:
2288
logger.warning("GnuTLS bye failed",
2289
exc_info=error)
1279
2290
1280
2291
@staticmethod
1281
2292
def peer_certificate(session):
1282
2293
"Return the peer's OpenPGP certificate as a bytestring"
1283
2294
# If not an OpenPGP certificate...
1284
if (gnutls.library.functions
1285
.gnutls_certificate_type_get(session._c_object)
1286
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1287
# ...do the normal thing
1288
return session.peer_certificate
2295
if (gnutls.certificate_type_get(session._c_object)
2296
!= gnutls.CRT_OPENPGP):
2297
# ...return invalid data
2298
return b""
1289
2299
list_size = ctypes.c_uint(1)
1290
cert_list = (gnutls.library.functions
1291
.gnutls_certificate_get_peers
2300
cert_list = (gnutls.certificate_get_peers
1292
2301
(session._c_object, ctypes.byref(list_size)))
1293
2302
if not bool(cert_list) and list_size.value != 0:
1294
raise gnutls.errors.GNUTLSError(u"error getting peer"
1295
u" certificate")
2303
raise gnutls.Error("error getting peer certificate")
1296
2304
if list_size.value == 0:
1297
2305
return None
1298
2306
cert = cert_list[0]
1302
2310
def fingerprint(openpgp):
1303
2311
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1304
2312
# New GnuTLS "datum" with the OpenPGP public key
1305
datum = (gnutls.library.types
1306
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1307
ctypes.POINTER
1308
(ctypes.c_ubyte)),
1309
ctypes.c_uint(len(openpgp))))
2313
datum = gnutls.datum_t(
2314
ctypes.cast(ctypes.c_char_p(openpgp),
2315
ctypes.POINTER(ctypes.c_ubyte)),
2316
ctypes.c_uint(len(openpgp)))
1310
2317
# New empty GnuTLS certificate
1311
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1312
(gnutls.library.functions
1313
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2318
crt = gnutls.openpgp_crt_t()
2319
gnutls.openpgp_crt_init(ctypes.byref(crt))
1314
2320
# Import the OpenPGP public key into the certificate
1315
(gnutls.library.functions
1316
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1317
gnutls.library.constants
1318
.GNUTLS_OPENPGP_FMT_RAW))
2321
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2322
gnutls.OPENPGP_FMT_RAW)
1319
2323
# Verify the self signature in the key
1320
2324
crtverify = ctypes.c_uint()
1321
(gnutls.library.functions
1322
.gnutls_openpgp_crt_verify_self(crt, 0,
1323
ctypes.byref(crtverify)))
2325
gnutls.openpgp_crt_verify_self(crt, 0,
2326
ctypes.byref(crtverify))
1324
2327
if crtverify.value != 0:
1325
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1326
raise (gnutls.errors.CertificateSecurityError
1327
(u"Verify failed"))
2328
gnutls.openpgp_crt_deinit(crt)
2329
raise gnutls.CertificateSecurityError("Verify failed")
1328
2330
# New buffer for the fingerprint
1329
2331
buf = ctypes.create_string_buffer(20)
1330
2332
buf_len = ctypes.c_size_t()
1331
2333
# Get the fingerprint from the certificate into the buffer
1332
(gnutls.library.functions
1333
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1334
ctypes.byref(buf_len)))
2334
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2335
ctypes.byref(buf_len))
1335
2336
# Deinit the certificate
1336
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2337
gnutls.openpgp_crt_deinit(crt)
1337
2338
# Convert the buffer to a Python bytestring
1338
2339
fpr = ctypes.string_at(buf, buf_len.value)
1339
2340
# Convert the bytestring to hexadecimal notation
1340
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
2341
hex_fpr = binascii.hexlify(fpr).upper()
1341
2342
return hex_fpr
1342
2343
1343
2344
1344
2345
class MultiprocessingMixIn(object):
1345
2346
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2347
1346
2348
def sub_process_main(self, request, address):
1347
2349
try:
1348
2350
self.finish_request(request, address)
1349
except:
2351
except Exception:
1350
2352
self.handle_error(request, address)
1351
2353
self.close_request(request)
1352
2354
1353
2355
def process_request(self, request, address):
1354
2356
"""Start a new process to process the request."""
1355
multiprocessing.Process(target = self.sub_process_main,
1356
args = (request, address)).start()
2357
proc = multiprocessing.Process(target = self.sub_process_main,
2358
args = (request, address))
2359
proc.start()
2360
return proc
2361
1357
2362
1358
2363
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1359
2364
""" adds a pipe to the MixIn """
2365
1360
2366
def process_request(self, request, client_address):
1361
2367
"""Overrides and wraps the original process_request().
1362
2368
1363
2369
This function creates a new pipe in self.pipe
1364
2370
"""
1365
2371
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1366
1367
super(MultiprocessingMixInWithPipe,
1368
self).process_request(request, client_address)
2372
2373
proc = MultiprocessingMixIn.process_request(self, request,
2374
client_address)
1369
2375
self.child_pipe.close()
1370
self.add_pipe(parent_pipe)
1371
1372
def add_pipe(self, parent_pipe):
2376
self.add_pipe(parent_pipe, proc)
2377
2378
def add_pipe(self, parent_pipe, proc):
1373
2379
"""Dummy function; override as necessary"""
1374
pass
2380
raise NotImplementedError()
2381
1375
2382
1376
2383
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1377
2384
socketserver.TCPServer, object):
1382
2389
interface: None or a network interface name (string)
1383
2390
use_ipv6: Boolean; to use IPv6 or not
1384
2391
"""
2392
1385
2393
def __init__(self, server_address, RequestHandlerClass,
1386
interface=None, use_ipv6=True):
2394
interface=None,
2395
use_ipv6=True,
2396
socketfd=None):
2397
"""If socketfd is set, use that file descriptor instead of
2398
creating a new one with socket.socket().
2399
"""
1387
2400
self.interface = interface
1388
2401
if use_ipv6:
1389
2402
self.address_family = socket.AF_INET6
2403
if socketfd is not None:
2404
# Save the file descriptor
2405
self.socketfd = socketfd
2406
# Save the original socket.socket() function
2407
self.socket_socket = socket.socket
2408
# To implement --socket, we monkey patch socket.socket.
2409
#
2410
# (When socketserver.TCPServer is a new-style class, we
2411
# could make self.socket into a property instead of monkey
2412
# patching socket.socket.)
2413
#
2414
# Create a one-time-only replacement for socket.socket()
2415
@functools.wraps(socket.socket)
2416
def socket_wrapper(*args, **kwargs):
2417
# Restore original function so subsequent calls are
2418
# not affected.
2419
socket.socket = self.socket_socket
2420
del self.socket_socket
2421
# This time only, return a new socket object from the
2422
# saved file descriptor.
2423
return socket.fromfd(self.socketfd, *args, **kwargs)
2424
# Replace socket.socket() function with wrapper
2425
socket.socket = socket_wrapper
2426
# The socketserver.TCPServer.__init__ will call
2427
# socket.socket(), which might be our replacement,
2428
# socket_wrapper(), if socketfd was set.
1390
2429
socketserver.TCPServer.__init__(self, server_address,
1391
2430
RequestHandlerClass)
2431
1392
2432
def server_bind(self):
1393
2433
"""This overrides the normal server_bind() function
1394
2434
to bind to an interface if one was specified, and also NOT to
1395
2435
bind to an address or port if they were not specified."""
1396
2436
if self.interface is not None:
1397
2437
if SO_BINDTODEVICE is None:
1398
logger.error(u"SO_BINDTODEVICE does not exist;"
1399
u" cannot bind to interface %s",
2438
logger.error("SO_BINDTODEVICE does not exist;"
2439
" cannot bind to interface %s",
1400
2440
self.interface)
1401
2441
else:
1402
2442
try:
1403
self.socket.setsockopt(socket.SOL_SOCKET,
1404
SO_BINDTODEVICE,
1405
str(self.interface
1406
+ u'\0'))
1407
except socket.error, error:
1408
if error[0] == errno.EPERM:
1409
logger.error(u"No permission to"
1410
u" bind to interface %s",
1411
self.interface)
1412
elif error[0] == errno.ENOPROTOOPT:
1413
logger.error(u"SO_BINDTODEVICE not available;"
1414
u" cannot bind to interface %s",
1415
self.interface)
2443
self.socket.setsockopt(
2444
socket.SOL_SOCKET, SO_BINDTODEVICE,
2445
(self.interface + "\0").encode("utf-8"))
2446
except socket.error as error:
2447
if error.errno == errno.EPERM:
2448
logger.error("No permission to bind to"
2449
" interface %s", self.interface)
2450
elif error.errno == errno.ENOPROTOOPT:
2451
logger.error("SO_BINDTODEVICE not available;"
2452
" cannot bind to interface %s",
2453
self.interface)
2454
elif error.errno == errno.ENODEV:
2455
logger.error("Interface %s does not exist,"
2456
" cannot bind", self.interface)
1416
2457
else:
1417
2458
raise
1418
2459
# Only bind(2) the socket if we really need to.
1419
2460
if self.server_address[0] or self.server_address[1]:
1420
2461
if not self.server_address[0]:
1421
2462
if self.address_family == socket.AF_INET6:
1422
any_address = u"::" # in6addr_any
2463
any_address = "::" # in6addr_any
1423
2464
else:
1424
any_address = socket.INADDR_ANY
2465
any_address = "0.0.0.0" # INADDR_ANY
1425
2466
self.server_address = (any_address,
1426
2467
self.server_address[1])
1427
2468
elif not self.server_address[1]:
1428
self.server_address = (self.server_address[0],
1429
0)
2469
self.server_address = (self.server_address[0], 0)
1430
2470
# if self.interface:
1431
2471
# self.server_address = (self.server_address[0],
1432
2472
# 0, # port
1444
2484
gnutls_priority GnuTLS priority string
1445
2485
use_dbus: Boolean; to emit D-Bus signals or not
1446
2486
1447
Assumes a gobject.MainLoop event loop.
2487
Assumes a GLib.MainLoop event loop.
1448
2488
"""
2489
1449
2490
def __init__(self, server_address, RequestHandlerClass,
1450
interface=None, use_ipv6=True, clients=None,
1451
gnutls_priority=None, use_dbus=True):
2491
interface=None,
2492
use_ipv6=True,
2493
clients=None,
2494
gnutls_priority=None,
2495
use_dbus=True,
2496
socketfd=None):
1452
2497
self.enabled = False
1453
2498
self.clients = clients
1454
2499
if self.clients is None:
1455
self.clients = set()
2500
self.clients = {}
1456
2501
self.use_dbus = use_dbus
1457
2502
self.gnutls_priority = gnutls_priority
1458
2503
IPv6_TCPServer.__init__(self, server_address,
1459
2504
RequestHandlerClass,
1460
2505
interface = interface,
1461
use_ipv6 = use_ipv6)
2506
use_ipv6 = use_ipv6,
2507
socketfd = socketfd)
2508
1462
2509
def server_activate(self):
1463
2510
if self.enabled:
1464
2511
return socketserver.TCPServer.server_activate(self)
2512
1465
2513
def enable(self):
1466
2514
self.enabled = True
1467
def add_pipe(self, parent_pipe):
2515
2516
def add_pipe(self, parent_pipe, proc):
1468
2517
# Call "handle_ipc" for both data and EOF events
1469
gobject.io_add_watch(parent_pipe.fileno(),
1470
gobject.IO_IN | gobject.IO_HUP,
1471
functools.partial(self.handle_ipc,
1472
parent_pipe = parent_pipe))
1473
1474
def handle_ipc(self, source, condition, parent_pipe=None,
2518
GLib.io_add_watch(
2519
parent_pipe.fileno(),
2520
GLib.IO_IN | GLib.IO_HUP,
2521
functools.partial(self.handle_ipc,
2522
parent_pipe = parent_pipe,
2523
proc = proc))
2524
2525
def handle_ipc(self, source, condition,
2526
parent_pipe=None,
2527
proc = None,
1475
2528
client_object=None):
1476
condition_names = {
1477
gobject.IO_IN: u"IN", # There is data to read.
1478
gobject.IO_OUT: u"OUT", # Data can be written (without
1479
# blocking).
1480
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1481
gobject.IO_ERR: u"ERR", # Error condition.
1482
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1483
# broken, usually for pipes and
1484
# sockets).
1485
}
1486
conditions_string = ' | '.join(name
1487
for cond, name in
1488
condition_names.iteritems()
1489
if cond & condition)
1490
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1491
conditions_string)
1492
1493
# error or the other end of multiprocessing.Pipe has closed
1494
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2529
# error, or the other end of multiprocessing.Pipe has closed
2530
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2531
# Wait for other process to exit
2532
proc.join()
1495
2533
return False
1496
2534
1497
2535
# Read a request from the child
1498
2536
request = parent_pipe.recv()
1499
logger.debug(u"IPC request: %s", repr(request))
1500
2537
command = request[0]
1501
2538
1502
2539
if command == 'init':
1503
2540
fpr = request[1]
1504
2541
address = request[2]
1505
2542
1506
for c in self.clients:
2543
for c in self.clients.values():
1507
2544
if c.fingerprint == fpr:
1508
2545
client = c
1509
2546
break
1510
2547
else:
1511
logger.warning(u"Client not found for fingerprint: %s, ad"
1512
u"dress: %s", fpr, address)
2548
logger.info("Client not found for fingerprint: %s, ad"
2549
"dress: %s", fpr, address)
1513
2550
if self.use_dbus:
1514
2551
# Emit D-Bus signal
1515
mandos_dbus_service.ClientNotFound(fpr, address)
2552
mandos_dbus_service.ClientNotFound(fpr,
2553
address[0])
1516
2554
parent_pipe.send(False)
1517
2555
return False
1518
2556
1519
gobject.io_add_watch(parent_pipe.fileno(),
1520
gobject.IO_IN | gobject.IO_HUP,
1521
functools.partial(self.handle_ipc,
1522
parent_pipe = parent_pipe,
1523
client_object = client))
2557
GLib.io_add_watch(
2558
parent_pipe.fileno(),
2559
GLib.IO_IN | GLib.IO_HUP,
2560
functools.partial(self.handle_ipc,
2561
parent_pipe = parent_pipe,
2562
proc = proc,
2563
client_object = client))
1524
2564
parent_pipe.send(True)
1525
# remove the old hook in favor of the new above hook on same fileno
2565
# remove the old hook in favor of the new above hook on
2566
# same fileno
1526
2567
return False
1527
2568
if command == 'funcall':
1528
2569
funcname = request[1]
1529
2570
args = request[2]
1530
2571
kwargs = request[3]
1531
2572
1532
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1533
2573
parent_pipe.send(('data', getattr(client_object,
2574
funcname)(*args,
2575
**kwargs)))
2576
1534
2577
if command == 'getattr':
1535
2578
attrname = request[1]
1536
if callable(client_object.__getattribute__(attrname)):
1537
parent_pipe.send(('function',))
2579
if isinstance(client_object.__getattribute__(attrname),
2580
collections.Callable):
2581
parent_pipe.send(('function', ))
1538
2582
else:
1539
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2583
parent_pipe.send((
2584
'data', client_object.__getattribute__(attrname)))
1540
2585
1541
2586
if command == 'setattr':
1542
2587
attrname = request[1]
1543
2588
value = request[2]
1544
2589
setattr(client_object, attrname, value)
1545
2590
1546
2591
return True
1547
2592
1548
2593
2594
def rfc3339_duration_to_delta(duration):
2595
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2596
2597
>>> rfc3339_duration_to_delta("P7D")
2598
datetime.timedelta(7)
2599
>>> rfc3339_duration_to_delta("PT60S")
2600
datetime.timedelta(0, 60)
2601
>>> rfc3339_duration_to_delta("PT60M")
2602
datetime.timedelta(0, 3600)
2603
>>> rfc3339_duration_to_delta("PT24H")
2604
datetime.timedelta(1)
2605
>>> rfc3339_duration_to_delta("P1W")
2606
datetime.timedelta(7)
2607
>>> rfc3339_duration_to_delta("PT5M30S")
2608
datetime.timedelta(0, 330)
2609
>>> rfc3339_duration_to_delta("P1DT3M20S")
2610
datetime.timedelta(1, 200)
2611
"""
2612
2613
# Parsing an RFC 3339 duration with regular expressions is not
2614
# possible - there would have to be multiple places for the same
2615
# values, like seconds. The current code, while more esoteric, is
2616
# cleaner without depending on a parsing library. If Python had a
2617
# built-in library for parsing we would use it, but we'd like to
2618
# avoid excessive use of external libraries.
2619
2620
# New type for defining tokens, syntax, and semantics all-in-one
2621
Token = collections.namedtuple("Token", (
2622
"regexp", # To match token; if "value" is not None, must have
2623
# a "group" containing digits
2624
"value", # datetime.timedelta or None
2625
"followers")) # Tokens valid after this token
2626
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2627
# the "duration" ABNF definition in RFC 3339, Appendix A.
2628
token_end = Token(re.compile(r"$"), None, frozenset())
2629
token_second = Token(re.compile(r"(\d+)S"),
2630
datetime.timedelta(seconds=1),
2631
frozenset((token_end, )))
2632
token_minute = Token(re.compile(r"(\d+)M"),
2633
datetime.timedelta(minutes=1),
2634
frozenset((token_second, token_end)))
2635
token_hour = Token(re.compile(r"(\d+)H"),
2636
datetime.timedelta(hours=1),
2637
frozenset((token_minute, token_end)))
2638
token_time = Token(re.compile(r"T"),
2639
None,
2640
frozenset((token_hour, token_minute,
2641
token_second)))
2642
token_day = Token(re.compile(r"(\d+)D"),
2643
datetime.timedelta(days=1),
2644
frozenset((token_time, token_end)))
2645
token_month = Token(re.compile(r"(\d+)M"),
2646
datetime.timedelta(weeks=4),
2647
frozenset((token_day, token_end)))
2648
token_year = Token(re.compile(r"(\d+)Y"),
2649
datetime.timedelta(weeks=52),
2650
frozenset((token_month, token_end)))
2651
token_week = Token(re.compile(r"(\d+)W"),
2652
datetime.timedelta(weeks=1),
2653
frozenset((token_end, )))
2654
token_duration = Token(re.compile(r"P"), None,
2655
frozenset((token_year, token_month,
2656
token_day, token_time,
2657
token_week)))
2658
# Define starting values
2659
value = datetime.timedelta() # Value so far
2660
found_token = None
2661
followers = frozenset((token_duration, )) # Following valid tokens
2662
s = duration # String left to parse
2663
# Loop until end token is found
2664
while found_token is not token_end:
2665
# Search for any currently valid tokens
2666
for token in followers:
2667
match = token.regexp.match(s)
2668
if match is not None:
2669
# Token found
2670
if token.value is not None:
2671
# Value found, parse digits
2672
factor = int(match.group(1), 10)
2673
# Add to value so far
2674
value += factor * token.value
2675
# Strip token from string
2676
s = token.regexp.sub("", s, 1)
2677
# Go to found token
2678
found_token = token
2679
# Set valid next tokens
2680
followers = found_token.followers
2681
break
2682
else:
2683
# No currently valid tokens were found
2684
raise ValueError("Invalid RFC 3339 duration: {!r}"
2685
.format(duration))
2686
# End token found
2687
return value
2688
2689
1549
2690
def string_to_delta(interval):
1550
2691
"""Parse a string and return a datetime.timedelta
1551
2692
1552
>>> string_to_delta(u'7d')
2693
>>> string_to_delta('7d')
1553
2694
datetime.timedelta(7)
1554
>>> string_to_delta(u'60s')
2695
>>> string_to_delta('60s')
1555
2696
datetime.timedelta(0, 60)
1556
>>> string_to_delta(u'60m')
2697
>>> string_to_delta('60m')
1557
2698
datetime.timedelta(0, 3600)
1558
>>> string_to_delta(u'24h')
2699
>>> string_to_delta('24h')
1559
2700
datetime.timedelta(1)
1560
>>> string_to_delta(u'1w')
2701
>>> string_to_delta('1w')
1561
2702
datetime.timedelta(7)
1562
>>> string_to_delta(u'5m 30s')
2703
>>> string_to_delta('5m 30s')
1563
2704
datetime.timedelta(0, 330)
1564
2705
"""
2706
2707
try:
2708
return rfc3339_duration_to_delta(interval)
2709
except ValueError:
2710
pass
2711
1565
2712
timevalue = datetime.timedelta(0)
1566
2713
for s in interval.split():
1567
2714
try:
1568
suffix = unicode(s[-1])
2715
suffix = s[-1]
1569
2716
value = int(s[:-1])
1570
if suffix == u"d":
2717
if suffix == "d":
1571
2718
delta = datetime.timedelta(value)
1572
elif suffix == u"s":
2719
elif suffix == "s":
1573
2720
delta = datetime.timedelta(0, value)
1574
elif suffix == u"m":
2721
elif suffix == "m":
1575
2722
delta = datetime.timedelta(0, 0, 0, 0, value)
1576
elif suffix == u"h":
2723
elif suffix == "h":
1577
2724
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1578
elif suffix == u"w":
2725
elif suffix == "w":
1579
2726
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1580
2727
else:
1581
raise ValueError(u"Unknown suffix %r" % suffix)
1582
except (ValueError, IndexError), e:
1583
raise ValueError(e.message)
2728
raise ValueError("Unknown suffix {!r}".format(suffix))
2729
except IndexError as e:
2730
raise ValueError(*(e.args))
1584
2731
timevalue += delta
1585
2732
return timevalue
1586
2733
1587
2734
1588
def if_nametoindex(interface):
1589
"""Call the C function if_nametoindex(), or equivalent
1590
1591
Note: This function cannot accept a unicode string."""
1592
global if_nametoindex
1593
try:
1594
if_nametoindex = (ctypes.cdll.LoadLibrary
1595
(ctypes.util.find_library(u"c"))
1596
.if_nametoindex)
1597
except (OSError, AttributeError):
1598
logger.warning(u"Doing if_nametoindex the hard way")
1599
def if_nametoindex(interface):
1600
"Get an interface index the hard way, i.e. using fcntl()"
1601
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1602
with contextlib.closing(socket.socket()) as s:
1603
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1604
struct.pack(str(u"16s16x"),
1605
interface))
1606
interface_index = struct.unpack(str(u"I"),
1607
ifreq[16:20])[0]
1608
return interface_index
1609
return if_nametoindex(interface)
1610
1611
1612
2735
def daemon(nochdir = False, noclose = False):
1613
2736
"""See daemon(3). Standard BSD Unix function.
1614
2737
1617
2740
sys.exit()
1618
2741
os.setsid()
1619
2742
if not nochdir:
1620
os.chdir(u"/")
2743
os.chdir("/")
1621
2744
if os.fork():
1622
2745
sys.exit()
1623
2746
if not noclose:
1624
2747
# Close all standard open file descriptors
1625
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2748
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1626
2749
if not stat.S_ISCHR(os.fstat(null).st_mode):
1627
2750
raise OSError(errno.ENODEV,
1628
u"%s not a character device"
1629
% os.path.devnull)
2751
"{} not a character device"
2752
.format(os.devnull))
1630
2753
os.dup2(null, sys.stdin.fileno())
1631
2754
os.dup2(null, sys.stdout.fileno())
1632
2755
os.dup2(null, sys.stderr.fileno())
1639
2762
##################################################################
1640
2763
# Parsing of options, both command line and config file
1641
2764
1642
parser = optparse.OptionParser(version = "%%prog %s" % version)
1643
parser.add_option("-i", u"--interface", type=u"string",
1644
metavar="IF", help=u"Bind to interface IF")
1645
parser.add_option("-a", u"--address", type=u"string",
1646
help=u"Address to listen for requests on")
1647
parser.add_option("-p", u"--port", type=u"int",
1648
help=u"Port number to receive requests on")
1649
parser.add_option("--check", action=u"store_true",
1650
help=u"Run self-test")
1651
parser.add_option("--debug", action=u"store_true",
1652
help=u"Debug mode; run in foreground and log to"
1653
u" terminal")
1654
parser.add_option("--debuglevel", type=u"string", metavar="Level",
1655
help=u"Debug level for stdout output")
1656
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1657
u" priority string (see GnuTLS documentation)")
1658
parser.add_option("--servicename", type=u"string",
1659
metavar=u"NAME", help=u"Zeroconf service name")
1660
parser.add_option("--configdir", type=u"string",
1661
default=u"/etc/mandos", metavar=u"DIR",
1662
help=u"Directory to search for configuration"
1663
u" files")
1664
parser.add_option("--no-dbus", action=u"store_false",
1665
dest=u"use_dbus", help=u"Do not provide D-Bus"
1666
u" system bus interface")
1667
parser.add_option("--no-ipv6", action=u"store_false",
1668
dest=u"use_ipv6", help=u"Do not use IPv6")
1669
options = parser.parse_args()[0]
2765
parser = argparse.ArgumentParser()
2766
parser.add_argument("-v", "--version", action="version",
2767
version = "%(prog)s {}".format(version),
2768
help="show version number and exit")
2769
parser.add_argument("-i", "--interface", metavar="IF",
2770
help="Bind to interface IF")
2771
parser.add_argument("-a", "--address",
2772
help="Address to listen for requests on")
2773
parser.add_argument("-p", "--port", type=int,
2774
help="Port number to receive requests on")
2775
parser.add_argument("--check", action="store_true",
2776
help="Run self-test")
2777
parser.add_argument("--debug", action="store_true",
2778
help="Debug mode; run in foreground and log"
2779
" to terminal", default=None)
2780
parser.add_argument("--debuglevel", metavar="LEVEL",
2781
help="Debug level for stdout output")
2782
parser.add_argument("--priority", help="GnuTLS"
2783
" priority string (see GnuTLS documentation)")
2784
parser.add_argument("--servicename",
2785
metavar="NAME", help="Zeroconf service name")
2786
parser.add_argument("--configdir",
2787
default="/etc/mandos", metavar="DIR",
2788
help="Directory to search for configuration"
2789
" files")
2790
parser.add_argument("--no-dbus", action="store_false",
2791
dest="use_dbus", help="Do not provide D-Bus"
2792
" system bus interface", default=None)
2793
parser.add_argument("--no-ipv6", action="store_false",
2794
dest="use_ipv6", help="Do not use IPv6",
2795
default=None)
2796
parser.add_argument("--no-restore", action="store_false",
2797
dest="restore", help="Do not restore stored"
2798
" state", default=None)
2799
parser.add_argument("--socket", type=int,
2800
help="Specify a file descriptor to a network"
2801
" socket to use instead of creating one")
2802
parser.add_argument("--statedir", metavar="DIR",
2803
help="Directory to save/restore state in")
2804
parser.add_argument("--foreground", action="store_true",
2805
help="Run in foreground", default=None)
2806
parser.add_argument("--no-zeroconf", action="store_false",
2807
dest="zeroconf", help="Do not use Zeroconf",
2808
default=None)
2809
2810
options = parser.parse_args()
1670
2811
1671
2812
if options.check:
1672
2813
import doctest
1673
doctest.testmod()
1674
sys.exit()
2814
fail_count, test_count = doctest.testmod()
2815
sys.exit(os.EX_OK if fail_count == 0 else 1)
1675
2816
1676
2817
# Default values for config file for server-global settings
1677
server_defaults = { u"interface": u"",
1678
u"address": u"",
1679
u"port": u"",
1680
u"debug": u"False",
1681
u"priority":
1682
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1683
u"servicename": u"Mandos",
1684
u"use_dbus": u"True",
1685
u"use_ipv6": u"True",
1686
u"debuglevel": u"",
1687
}
2818
server_defaults = { "interface": "",
2819
"address": "",
2820
"port": "",
2821
"debug": "False",
2822
"priority":
2823
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2824
":+SIGN-DSA-SHA256",
2825
"servicename": "Mandos",
2826
"use_dbus": "True",
2827
"use_ipv6": "True",
2828
"debuglevel": "",
2829
"restore": "True",
2830
"socket": "",
2831
"statedir": "/var/lib/mandos",
2832
"foreground": "False",
2833
"zeroconf": "True",
2834
}
1688
2835
1689
2836
# Parse config file for server-global settings
1690
2837
server_config = configparser.SafeConfigParser(server_defaults)
1691
2838
del server_defaults
1692
server_config.read(os.path.join(options.configdir,
1693
u"mandos.conf"))
2839
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1694
2840
# Convert the SafeConfigParser object to a dict
1695
2841
server_settings = server_config.defaults()
1696
2842
# Use the appropriate methods on the non-string config options
1697
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1698
server_settings[option] = server_config.getboolean(u"DEFAULT",
2843
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2844
server_settings[option] = server_config.getboolean("DEFAULT",
1699
2845
option)
1700
2846
if server_settings["port"]:
1701
server_settings["port"] = server_config.getint(u"DEFAULT",
1702
u"port")
2847
server_settings["port"] = server_config.getint("DEFAULT",
2848
"port")
2849
if server_settings["socket"]:
2850
server_settings["socket"] = server_config.getint("DEFAULT",
2851
"socket")
2852
# Later, stdin will, and stdout and stderr might, be dup'ed
2853
# over with an opened os.devnull. But we don't want this to
2854
# happen with a supplied network socket.
2855
if 0 <= server_settings["socket"] <= 2:
2856
server_settings["socket"] = os.dup(server_settings
2857
["socket"])
1703
2858
del server_config
1704
2859
1705
2860
# Override the settings from the config file with command line
1706
2861
# options, if set.
1707
for option in (u"interface", u"address", u"port", u"debug",
1708
u"priority", u"servicename", u"configdir",
1709
u"use_dbus", u"use_ipv6", u"debuglevel"):
2862
for option in ("interface", "address", "port", "debug",
2863
"priority", "servicename", "configdir", "use_dbus",
2864
"use_ipv6", "debuglevel", "restore", "statedir",
2865
"socket", "foreground", "zeroconf"):
1710
2866
value = getattr(options, option)
1711
2867
if value is not None:
1712
2868
server_settings[option] = value
1713
2869
del options
1714
2870
# Force all strings to be unicode
1715
2871
for option in server_settings.keys():
1716
if type(server_settings[option]) is str:
1717
server_settings[option] = unicode(server_settings[option])
2872
if isinstance(server_settings[option], bytes):
2873
server_settings[option] = (server_settings[option]
2874
.decode("utf-8"))
2875
# Force all boolean options to be boolean
2876
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2877
"foreground", "zeroconf"):
2878
server_settings[option] = bool(server_settings[option])
2879
# Debug implies foreground
2880
if server_settings["debug"]:
2881
server_settings["foreground"] = True
1718
2882
# Now we have our good server settings in "server_settings"
1719
2883
1720
2884
##################################################################
1721
2885
2886
if (not server_settings["zeroconf"]
2887
and not (server_settings["port"]
2888
or server_settings["socket"] != "")):
2889
parser.error("Needs port or socket to work without Zeroconf")
2890
1722
2891
# For convenience
1723
debug = server_settings[u"debug"]
1724
debuglevel = server_settings[u"debuglevel"]
1725
use_dbus = server_settings[u"use_dbus"]
1726
use_ipv6 = server_settings[u"use_ipv6"]
1727
1728
if server_settings[u"servicename"] != u"Mandos":
1729
syslogger.setFormatter(logging.Formatter
1730
(u'Mandos (%s) [%%(process)d]:'
1731
u' %%(levelname)s: %%(message)s'
1732
% server_settings[u"servicename"]))
2892
debug = server_settings["debug"]
2893
debuglevel = server_settings["debuglevel"]
2894
use_dbus = server_settings["use_dbus"]
2895
use_ipv6 = server_settings["use_ipv6"]
2896
stored_state_path = os.path.join(server_settings["statedir"],
2897
stored_state_file)
2898
foreground = server_settings["foreground"]
2899
zeroconf = server_settings["zeroconf"]
2900
2901
if debug:
2902
initlogger(debug, logging.DEBUG)
2903
else:
2904
if not debuglevel:
2905
initlogger(debug)
2906
else:
2907
level = getattr(logging, debuglevel.upper())
2908
initlogger(debug, level)
2909
2910
if server_settings["servicename"] != "Mandos":
2911
syslogger.setFormatter(
2912
logging.Formatter('Mandos ({}) [%(process)d]:'
2913
' %(levelname)s: %(message)s'.format(
2914
server_settings["servicename"])))
1733
2915
1734
2916
# Parse config file with clients
1735
client_defaults = { u"timeout": u"1h",
1736
u"interval": u"5m",
1737
u"checker": u"fping -q -- %%(host)s",
1738
u"host": u"",
1739
u"approval_delay": u"0s",
1740
u"approval_duration": u"1s",
1741
}
1742
client_config = configparser.SafeConfigParser(client_defaults)
1743
client_config.read(os.path.join(server_settings[u"configdir"],
1744
u"clients.conf"))
2917
client_config = configparser.SafeConfigParser(Client
2918
.client_defaults)
2919
client_config.read(os.path.join(server_settings["configdir"],
2920
"clients.conf"))
1745
2921
1746
2922
global mandos_dbus_service
1747
2923
mandos_dbus_service = None
1748
2924
1749
tcp_server = MandosServer((server_settings[u"address"],
1750
server_settings[u"port"]),
1751
ClientHandler,
1752
interface=(server_settings[u"interface"]
1753
or None),
1754
use_ipv6=use_ipv6,
1755
gnutls_priority=
1756
server_settings[u"priority"],
1757
use_dbus=use_dbus)
1758
pidfilename = u"/var/run/mandos.pid"
1759
try:
1760
pidfile = open(pidfilename, u"w")
1761
except IOError:
1762
logger.error(u"Could not open file %r", pidfilename)
2925
socketfd = None
2926
if server_settings["socket"] != "":
2927
socketfd = server_settings["socket"]
2928
tcp_server = MandosServer(
2929
(server_settings["address"], server_settings["port"]),
2930
ClientHandler,
2931
interface=(server_settings["interface"] or None),
2932
use_ipv6=use_ipv6,
2933
gnutls_priority=server_settings["priority"],
2934
use_dbus=use_dbus,
2935
socketfd=socketfd)
2936
if not foreground:
2937
pidfilename = "/run/mandos.pid"
2938
if not os.path.isdir("/run/."):
2939
pidfilename = "/var/run/mandos.pid"
2940
pidfile = None
2941
try:
2942
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2943
except IOError as e:
2944
logger.error("Could not open file %r", pidfilename,
2945
exc_info=e)
1763
2946
1764
try:
1765
uid = pwd.getpwnam(u"_mandos").pw_uid
1766
gid = pwd.getpwnam(u"_mandos").pw_gid
1767
except KeyError:
2947
for name, group in (("_mandos", "_mandos"),
2948
("mandos", "mandos"),
2949
("nobody", "nogroup")):
1768
2950
try:
1769
uid = pwd.getpwnam(u"mandos").pw_uid
1770
gid = pwd.getpwnam(u"mandos").pw_gid
2951
uid = pwd.getpwnam(name).pw_uid
2952
gid = pwd.getpwnam(group).pw_gid
2953
break
1771
2954
except KeyError:
1772
try:
1773
uid = pwd.getpwnam(u"nobody").pw_uid
1774
gid = pwd.getpwnam(u"nobody").pw_gid
1775
except KeyError:
1776
uid = 65534
1777
gid = 65534
2955
continue
2956
else:
2957
uid = 65534
2958
gid = 65534
1778
2959
try:
1779
2960
os.setgid(gid)
1780
2961
os.setuid(uid)
1781
except OSError, error:
1782
if error[0] != errno.EPERM:
1783
raise error
2962
if debug:
2963
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2964
gid))
2965
except OSError as error:
2966
logger.warning("Failed to setuid/setgid to {}:{}: {}"
2967
.format(uid, gid, os.strerror(error.errno)))
2968
if error.errno != errno.EPERM:
2969
raise
1784
2970
1785
if not debug and not debuglevel:
1786
syslogger.setLevel(logging.WARNING)
1787
console.setLevel(logging.WARNING)
1788
if debuglevel:
1789
level = getattr(logging, debuglevel.upper())
1790
syslogger.setLevel(level)
1791
console.setLevel(level)
1792
1793
2971
if debug:
1794
2972
# Enable all possible GnuTLS debugging
1795
2973
1796
2974
# "Use a log level over 10 to enable all debugging options."
1797
2975
# - GnuTLS manual
1798
gnutls.library.functions.gnutls_global_set_log_level(11)
2976
gnutls.global_set_log_level(11)
1799
2977
1800
@gnutls.library.types.gnutls_log_func
2978
@gnutls.log_func
1801
2979
def debug_gnutls(level, string):
1802
logger.debug(u"GnuTLS: %s", string[:-1])
2980
logger.debug("GnuTLS: %s", string[:-1])
1803
2981
1804
(gnutls.library.functions
1805
.gnutls_global_set_log_function(debug_gnutls))
2982
gnutls.global_set_log_function(debug_gnutls)
1806
2983
1807
2984
# Redirect stdin so all checkers get /dev/null
1808
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2985
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1809
2986
os.dup2(null, sys.stdin.fileno())
1810
2987
if null > 2:
1811
2988
os.close(null)
1812
else:
1813
# No console logging
1814
logger.removeHandler(console)
1815
2989
2990
# Need to fork before connecting to D-Bus
2991
if not foreground:
2992
# Close all input and output, do double fork, etc.
2993
daemon()
2994
2995
# multiprocessing will use threads, so before we use GLib we need
2996
# to inform GLib that threads will be used.
2997
GLib.threads_init()
1816
2998
1817
2999
global main_loop
1818
3000
# From the Avahi example code
1819
DBusGMainLoop(set_as_default=True )
1820
main_loop = gobject.MainLoop()
3001
DBusGMainLoop(set_as_default=True)
3002
main_loop = GLib.MainLoop()
1821
3003
bus = dbus.SystemBus()
1822
3004
# End of Avahi example code
1823
3005
if use_dbus:
1824
3006
try:
1825
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1826
bus, do_not_queue=True)
1827
except dbus.exceptions.NameExistsException, e:
1828
logger.error(unicode(e) + u", disabling D-Bus")
3007
bus_name = dbus.service.BusName("se.recompile.Mandos",
3008
bus,
3009
do_not_queue=True)
3010
old_bus_name = dbus.service.BusName(
3011
"se.bsnet.fukt.Mandos", bus,
3012
do_not_queue=True)
3013
except dbus.exceptions.DBusException as e:
3014
logger.error("Disabling D-Bus:", exc_info=e)
1829
3015
use_dbus = False
1830
server_settings[u"use_dbus"] = False
3016
server_settings["use_dbus"] = False
1831
3017
tcp_server.use_dbus = False
1832
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1833
service = AvahiService(name = server_settings[u"servicename"],
1834
servicetype = u"_mandos._tcp",
1835
protocol = protocol, bus = bus)
1836
if server_settings["interface"]:
1837
service.interface = (if_nametoindex
1838
(str(server_settings[u"interface"])))
1839
1840
if not debug:
1841
# Close all input and output, do double fork, etc.
1842
daemon()
1843
3018
if zeroconf:
3019
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3020
service = AvahiServiceToSyslog(
3021
name = server_settings["servicename"],
3022
servicetype = "_mandos._tcp",
3023
protocol = protocol,
3024
bus = bus)
3025
if server_settings["interface"]:
3026
service.interface = if_nametoindex(
3027
server_settings["interface"].encode("utf-8"))
3028
1844
3029
global multiprocessing_manager
1845
3030
multiprocessing_manager = multiprocessing.Manager()
1846
3031
1847
3032
client_class = Client
1848
3033
if use_dbus:
1849
3034
client_class = functools.partial(ClientDBus, bus = bus)
1850
def client_config_items(config, section):
1851
special_settings = {
1852
"approved_by_default":
1853
lambda: config.getboolean(section,
1854
"approved_by_default"),
1855
}
1856
for name, value in config.items(section):
3035
3036
client_settings = Client.config_parser(client_config)
3037
old_client_settings = {}
3038
clients_data = {}
3039
3040
# This is used to redirect stdout and stderr for checker processes
3041
global wnull
3042
wnull = open(os.devnull, "w") # A writable /dev/null
3043
# Only used if server is running in foreground but not in debug
3044
# mode
3045
if debug or not foreground:
3046
wnull.close()
3047
3048
# Get client data and settings from last running state.
3049
if server_settings["restore"]:
3050
try:
3051
with open(stored_state_path, "rb") as stored_state:
3052
if sys.version_info.major == 2:
3053
clients_data, old_client_settings = pickle.load(
3054
stored_state)
3055
else:
3056
bytes_clients_data, bytes_old_client_settings = (
3057
pickle.load(stored_state, encoding = "bytes"))
3058
### Fix bytes to strings
3059
## clients_data
3060
# .keys()
3061
clients_data = { (key.decode("utf-8")
3062
if isinstance(key, bytes)
3063
else key): value
3064
for key, value in
3065
bytes_clients_data.items() }
3066
del bytes_clients_data
3067
for key in clients_data:
3068
value = { (k.decode("utf-8")
3069
if isinstance(k, bytes) else k): v
3070
for k, v in
3071
clients_data[key].items() }
3072
clients_data[key] = value
3073
# .client_structure
3074
value["client_structure"] = [
3075
(s.decode("utf-8")
3076
if isinstance(s, bytes)
3077
else s) for s in
3078
value["client_structure"] ]
3079
# .name & .host
3080
for k in ("name", "host"):
3081
if isinstance(value[k], bytes):
3082
value[k] = value[k].decode("utf-8")
3083
## old_client_settings
3084
# .keys()
3085
old_client_settings = {
3086
(key.decode("utf-8")
3087
if isinstance(key, bytes)
3088
else key): value
3089
for key, value in
3090
bytes_old_client_settings.items() }
3091
del bytes_old_client_settings
3092
# .host
3093
for value in old_client_settings.values():
3094
if isinstance(value["host"], bytes):
3095
value["host"] = (value["host"]
3096
.decode("utf-8"))
3097
os.remove(stored_state_path)
3098
except IOError as e:
3099
if e.errno == errno.ENOENT:
3100
logger.warning("Could not load persistent state:"
3101
" {}".format(os.strerror(e.errno)))
3102
else:
3103
logger.critical("Could not load persistent state:",
3104
exc_info=e)
3105
raise
3106
except EOFError as e:
3107
logger.warning("Could not load persistent state: "
3108
"EOFError:",
3109
exc_info=e)
3110
3111
with PGPEngine() as pgp:
3112
for client_name, client in clients_data.items():
3113
# Skip removed clients
3114
if client_name not in client_settings:
3115
continue
3116
3117
# Decide which value to use after restoring saved state.
3118
# We have three different values: Old config file,
3119
# new config file, and saved state.
3120
# New config value takes precedence if it differs from old
3121
# config value, otherwise use saved state.
3122
for name, value in client_settings[client_name].items():
3123
try:
3124
# For each value in new config, check if it
3125
# differs from the old config value (Except for
3126
# the "secret" attribute)
3127
if (name != "secret"
3128
and (value !=
3129
old_client_settings[client_name][name])):
3130
client[name] = value
3131
except KeyError:
3132
pass
3133
3134
# Clients who has passed its expire date can still be
3135
# enabled if its last checker was successful. A Client
3136
# whose checker succeeded before we stored its state is
3137
# assumed to have successfully run all checkers during
3138
# downtime.
3139
if client["enabled"]:
3140
if datetime.datetime.utcnow() >= client["expires"]:
3141
if not client["last_checked_ok"]:
3142
logger.warning(
3143
"disabling client {} - Client never "
3144
"performed a successful checker".format(
3145
client_name))
3146
client["enabled"] = False
3147
elif client["last_checker_status"] != 0:
3148
logger.warning(
3149
"disabling client {} - Client last"
3150
" checker failed with error code"
3151
" {}".format(
3152
client_name,
3153
client["last_checker_status"]))
3154
client["enabled"] = False
3155
else:
3156
client["expires"] = (
3157
datetime.datetime.utcnow()
3158
+ client["timeout"])
3159
logger.debug("Last checker succeeded,"
3160
" keeping {} enabled".format(
3161
client_name))
1857
3162
try:
1858
yield (name, special_settings[name]())
1859
except KeyError:
1860
yield (name, value)
1861
1862
tcp_server.clients.update(set(
1863
client_class(name = section,
1864
config= dict(client_config_items(
1865
client_config, section)))
1866
for section in client_config.sections()))
3163
client["secret"] = pgp.decrypt(
3164
client["encrypted_secret"],
3165
client_settings[client_name]["secret"])
3166
except PGPError:
3167
# If decryption fails, we use secret from new settings
3168
logger.debug("Failed to decrypt {} old secret".format(
3169
client_name))
3170
client["secret"] = (client_settings[client_name]
3171
["secret"])
3172
3173
# Add/remove clients based on new changes made to config
3174
for client_name in (set(old_client_settings)
3175
- set(client_settings)):
3176
del clients_data[client_name]
3177
for client_name in (set(client_settings)
3178
- set(old_client_settings)):
3179
clients_data[client_name] = client_settings[client_name]
3180
3181
# Create all client objects
3182
for client_name, client in clients_data.items():
3183
tcp_server.clients[client_name] = client_class(
3184
name = client_name,
3185
settings = client,
3186
server_settings = server_settings)
3187
1867
3188
if not tcp_server.clients:
1868
logger.warning(u"No clients defined")
1869
1870
try:
1871
with pidfile:
3189
logger.warning("No clients defined")
3190
3191
if not foreground:
3192
if pidfile is not None:
1872
3193
pid = os.getpid()
1873
pidfile.write(str(pid) + "\n")
3194
try:
3195
with pidfile:
3196
print(pid, file=pidfile)
3197
except IOError:
3198
logger.error("Could not write to file %r with PID %d",
3199
pidfilename, pid)
1874
3200
del pidfile
1875
except IOError:
1876
logger.error(u"Could not write to file %r with PID %d",
1877
pidfilename, pid)
1878
except NameError:
1879
# "pidfile" was never created
1880
pass
1881
del pidfilename
3201
del pidfilename
1882
3202
1883
if not debug:
1884
signal.signal(signal.SIGINT, signal.SIG_IGN)
1885
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1886
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3203
for termsig in (signal.SIGHUP, signal.SIGTERM):
3204
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3205
lambda: main_loop.quit() and False)
1887
3206
1888
3207
if use_dbus:
1889
class MandosDBusService(dbus.service.Object):
3208
3209
@alternate_dbus_interfaces(
3210
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3211
class MandosDBusService(DBusObjectWithObjectManager):
1890
3212
"""A D-Bus proxy object"""
3213
1891
3214
def __init__(self):
1892
dbus.service.Object.__init__(self, bus, u"/")
1893
_interface = u"se.bsnet.fukt.Mandos"
1894
1895
@dbus.service.signal(_interface, signature=u"o")
3215
dbus.service.Object.__init__(self, bus, "/")
3216
3217
_interface = "se.recompile.Mandos"
3218
3219
@dbus.service.signal(_interface, signature="o")
1896
3220
def ClientAdded(self, objpath):
1897
3221
"D-Bus signal"
1898
3222
pass
1899
3223
1900
@dbus.service.signal(_interface, signature=u"ss")
3224
@dbus.service.signal(_interface, signature="ss")
1901
3225
def ClientNotFound(self, fingerprint, address):
1902
3226
"D-Bus signal"
1903
3227
pass
1904
3228
1905
@dbus.service.signal(_interface, signature=u"os")
3229
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3230
"true"})
3231
@dbus.service.signal(_interface, signature="os")
1906
3232
def ClientRemoved(self, objpath, name):
1907
3233
"D-Bus signal"
1908
3234
pass
1909
3235
1910
@dbus.service.method(_interface, out_signature=u"ao")
3236
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3237
"true"})
3238
@dbus.service.method(_interface, out_signature="ao")
1911
3239
def GetAllClients(self):
1912
3240
"D-Bus method"
1913
return dbus.Array(c.dbus_object_path
1914
for c in tcp_server.clients)
3241
return dbus.Array(c.dbus_object_path for c in
3242
tcp_server.clients.values())
1915
3243
3244
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3245
"true"})
1916
3246
@dbus.service.method(_interface,
1917
out_signature=u"a{oa{sv}}")
3247
out_signature="a{oa{sv}}")
1918
3248
def GetAllClientsWithProperties(self):
1919
3249
"D-Bus method"
1920
3250
return dbus.Dictionary(
1921
((c.dbus_object_path, c.GetAll(u""))
1922
for c in tcp_server.clients),
1923
signature=u"oa{sv}")
3251
{ c.dbus_object_path: c.GetAll(
3252
"se.recompile.Mandos.Client")
3253
for c in tcp_server.clients.values() },
3254
signature="oa{sv}")
1924
3255
1925
@dbus.service.method(_interface, in_signature=u"o")
3256
@dbus.service.method(_interface, in_signature="o")
1926
3257
def RemoveClient(self, object_path):
1927
3258
"D-Bus method"
1928
for c in tcp_server.clients:
3259
for c in tcp_server.clients.values():
1929
3260
if c.dbus_object_path == object_path:
1930
tcp_server.clients.remove(c)
3261
del tcp_server.clients[c.name]
1931
3262
c.remove_from_connection()
1932
# Don't signal anything except ClientRemoved
3263
# Don't signal the disabling
1933
3264
c.disable(quiet=True)
1934
# Emit D-Bus signal
1935
self.ClientRemoved(object_path, c.name)
3265
# Emit D-Bus signal for removal
3266
self.client_removed_signal(c)
1936
3267
return
1937
3268
raise KeyError(object_path)
1938
3269
1939
3270
del _interface
3271
3272
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3273
out_signature = "a{oa{sa{sv}}}")
3274
def GetManagedObjects(self):
3275
"""D-Bus method"""
3276
return dbus.Dictionary(
3277
{ client.dbus_object_path:
3278
dbus.Dictionary(
3279
{ interface: client.GetAll(interface)
3280
for interface in
3281
client._get_all_interface_names()})
3282
for client in tcp_server.clients.values()})
3283
3284
def client_added_signal(self, client):
3285
"""Send the new standard signal and the old signal"""
3286
if use_dbus:
3287
# New standard signal
3288
self.InterfacesAdded(
3289
client.dbus_object_path,
3290
dbus.Dictionary(
3291
{ interface: client.GetAll(interface)
3292
for interface in
3293
client._get_all_interface_names()}))
3294
# Old signal
3295
self.ClientAdded(client.dbus_object_path)
3296
3297
def client_removed_signal(self, client):
3298
"""Send the new standard signal and the old signal"""
3299
if use_dbus:
3300
# New standard signal
3301
self.InterfacesRemoved(
3302
client.dbus_object_path,
3303
client._get_all_interface_names())
3304
# Old signal
3305
self.ClientRemoved(client.dbus_object_path,
3306
client.name)
1940
3307
1941
3308
mandos_dbus_service = MandosDBusService()
1942
3309
1943
3310
def cleanup():
1944
3311
"Cleanup function; run on exit"
1945
service.cleanup()
1946
3312
if zeroconf:
3313
service.cleanup()
3314
3315
multiprocessing.active_children()
3316
wnull.close()
3317
if not (tcp_server.clients or client_settings):
3318
return
3319
3320
# Store client before exiting. Secrets are encrypted with key
3321
# based on what config file has. If config file is
3322
# removed/edited, old secret will thus be unrecovable.
3323
clients = {}
3324
with PGPEngine() as pgp:
3325
for client in tcp_server.clients.values():
3326
key = client_settings[client.name]["secret"]
3327
client.encrypted_secret = pgp.encrypt(client.secret,
3328
key)
3329
client_dict = {}
3330
3331
# A list of attributes that can not be pickled
3332
# + secret.
3333
exclude = { "bus", "changedstate", "secret",
3334
"checker", "server_settings" }
3335
for name, typ in inspect.getmembers(dbus.service
3336
.Object):
3337
exclude.add(name)
3338
3339
client_dict["encrypted_secret"] = (client
3340
.encrypted_secret)
3341
for attr in client.client_structure:
3342
if attr not in exclude:
3343
client_dict[attr] = getattr(client, attr)
3344
3345
clients[client.name] = client_dict
3346
del client_settings[client.name]["secret"]
3347
3348
try:
3349
with tempfile.NamedTemporaryFile(
3350
mode='wb',
3351
suffix=".pickle",
3352
prefix='clients-',
3353
dir=os.path.dirname(stored_state_path),
3354
delete=False) as stored_state:
3355
pickle.dump((clients, client_settings), stored_state,
3356
protocol = 2)
3357
tempname = stored_state.name
3358
os.rename(tempname, stored_state_path)
3359
except (IOError, OSError) as e:
3360
if not debug:
3361
try:
3362
os.remove(tempname)
3363
except NameError:
3364
pass
3365
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3366
logger.warning("Could not save persistent state: {}"
3367
.format(os.strerror(e.errno)))
3368
else:
3369
logger.warning("Could not save persistent state:",
3370
exc_info=e)
3371
raise
3372
3373
# Delete all clients, and settings from config
1947
3374
while tcp_server.clients:
1948
client = tcp_server.clients.pop()
3375
name, client = tcp_server.clients.popitem()
1949
3376
if use_dbus:
1950
3377
client.remove_from_connection()
1951
client.disable_hook = None
1952
# Don't signal anything except ClientRemoved
3378
# Don't signal the disabling
1953
3379
client.disable(quiet=True)
3380
# Emit D-Bus signal for removal
1954
3381
if use_dbus:
1955
# Emit D-Bus signal
1956
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1957
client.name)
3382
mandos_dbus_service.client_removed_signal(client)
3383
client_settings.clear()
1958
3384
1959
3385
atexit.register(cleanup)
1960
3386
1961
for client in tcp_server.clients:
3387
for client in tcp_server.clients.values():
1962
3388
if use_dbus:
1963
# Emit D-Bus signal
1964
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1965
client.enable()
3389
# Emit D-Bus signal for adding
3390
mandos_dbus_service.client_added_signal(client)
3391
# Need to initiate checking of clients
3392
if client.enabled:
3393
client.init_checker()
1966
3394
1967
3395
tcp_server.enable()
1968
3396
tcp_server.server_activate()
1969
3397
1970
3398
# Find out what port we got
1971
service.port = tcp_server.socket.getsockname()[1]
3399
if zeroconf:
3400
service.port = tcp_server.socket.getsockname()[1]
1972
3401
if use_ipv6:
1973
logger.info(u"Now listening on address %r, port %d,"
1974
" flowinfo %d, scope_id %d"
1975
% tcp_server.socket.getsockname())
3402
logger.info("Now listening on address %r, port %d,"
3403
" flowinfo %d, scope_id %d",
3404
*tcp_server.socket.getsockname())
1976
3405
else: # IPv4
1977
logger.info(u"Now listening on address %r, port %d"
1978
% tcp_server.socket.getsockname())
3406
logger.info("Now listening on address %r, port %d",
3407
*tcp_server.socket.getsockname())
1979
3408
1980
3409
#service.interface = tcp_server.socket.getsockname()[3]
1981
3410
1982
3411
try:
1983
# From the Avahi example code
1984
try:
1985
service.activate()
1986
except dbus.exceptions.DBusException, error:
1987
logger.critical(u"DBusException: %s", error)
1988
cleanup()
1989
sys.exit(1)
1990
# End of Avahi example code
1991
1992
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1993
lambda *args, **kwargs:
1994
(tcp_server.handle_request
1995
(*args[2:], **kwargs) or True))
1996
1997
logger.debug(u"Starting main loop")
3412
if zeroconf:
3413
# From the Avahi example code
3414
try:
3415
service.activate()
3416
except dbus.exceptions.DBusException as error:
3417
logger.critical("D-Bus Exception", exc_info=error)
3418
cleanup()
3419
sys.exit(1)
3420
# End of Avahi example code
3421
3422
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3423
lambda *args, **kwargs:
3424
(tcp_server.handle_request
3425
(*args[2:], **kwargs) or True))
3426
3427
logger.debug("Starting main loop")
1998
3428
main_loop.run()
1999
except AvahiError, error:
2000
logger.critical(u"AvahiError: %s", error)
3429
except AvahiError as error:
3430
logger.critical("Avahi Error", exc_info=error)
2001
3431
cleanup()
2002
3432
sys.exit(1)
2003
3433
except KeyboardInterrupt:
2004
3434
if debug:
2005
print >> sys.stderr
2006
logger.debug(u"Server received KeyboardInterrupt")
2007
logger.debug(u"Server exiting")
3435
print("", file=sys.stderr)
3436
logger.debug("Server received KeyboardInterrupt")
3437
logger.debug("Server exiting")
2008
3438
# Must run before the D-Bus bus name gets deregistered
2009
3439
cleanup()
2010
3440
3441
2011
3442
if __name__ == '__main__':
2012
3443
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0