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- Committer: Teddy Hogeborn
- Date: 2016-03-17 20:40:55 UTC
- Revision ID: teddy@recompile.se-20160317204055-bhsh5xsidq7w5cxu
Client: Fix plymouth agent; broken since 1.7.2.
Fix an very old memory bug in the plymouth agent (which has been
present since its apperance in version 1.2), but which was only
recently detected at run time due to the new -fsanitize=address
compile- time flag, which has been used since version 1.7.2. This
detection of a memory access violation causes the program to abort,
making the Plymouth graphical boot system unable to accept interactive
input of passwords when using the Mandos client.
* plugins.d/plymouth.c (exec_and_wait): Fix memory allocation bug when
allocating new_argv. Also tolerate a zero-length argv.
Fix an very old memory bug in the plymouth agent (which has been
present since its apperance in version 1.2), but which was only
recently detected at run time due to the new -fsanitize=address
compile- time flag, which has been used since version 1.7.2. This
detection of a memory access violation causes the program to abort,
making the Plymouth graphical boot system unable to accept interactive
input of passwords when using the Mandos client.
* plugins.d/plymouth.c (exec_and_wait): Fix memory allocation bug when
allocating new_argv. Also tolerate a zero-length argv.
- files added:
- bugs.xml
- debian/upstream
- 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 © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 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
34
34
from __future__ import (division, absolute_import, print_function,
35
35
unicode_literals)
36
36
37
import SocketServer as socketserver
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
38
46
import socket
39
47
import argparse
40
48
import datetime
41
49
import errno
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
50
try:
51
import ConfigParser as configparser
52
except ImportError:
53
import configparser
49
54
import sys
50
55
import re
51
56
import os
60
65
import struct
61
66
import fcntl
62
67
import functools
63
import cPickle as pickle
68
try:
69
import cPickle as pickle
70
except ImportError:
71
import pickle
64
72
import multiprocessing
65
73
import types
66
74
import binascii
67
75
import tempfile
76
import itertools
77
import collections
78
import codecs
68
79
69
80
import dbus
70
81
import dbus.service
71
import gobject
72
import avahi
82
from gi.repository import GLib
73
83
from dbus.mainloop.glib import DBusGMainLoop
74
84
import ctypes
75
85
import ctypes.util
76
86
import xml.dom.minidom
77
87
import inspect
78
import GnuPGInterface
79
88
80
89
try:
81
90
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
94
except ImportError:
86
95
SO_BINDTODEVICE = None
87
96
88
version = "1.5.3"
97
if sys.version_info.major == 2:
98
str = unicode
99
100
version = "1.7.6"
89
101
stored_state_file = "clients.pickle"
90
102
91
103
logger = logging.getLogger()
92
syslogger = (logging.handlers.SysLogHandler
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
104
syslogger = None
95
105
96
106
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
107
if_nametoindex = ctypes.cdll.LoadLibrary(
108
ctypes.util.find_library("c")).if_nametoindex
100
109
except (OSError, AttributeError):
110
101
111
def if_nametoindex(interface):
102
112
"Get an interface index the hard way, i.e. using fcntl()"
103
113
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
114
with contextlib.closing(socket.socket()) as s:
105
115
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
116
struct.pack(b"16s16x", interface))
117
interface_index = struct.unpack("I", ifreq[16:20])[0]
110
118
return interface_index
111
119
112
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
113
137
def initlogger(debug, level=logging.WARNING):
114
138
"""init logger and add loglevel"""
115
139
140
global syslogger
141
syslogger = (logging.handlers.SysLogHandler(
142
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
143
address = "/dev/log"))
116
144
syslogger.setFormatter(logging.Formatter
117
145
('Mandos [%(process)d]: %(levelname)s:'
118
146
' %(message)s'))
135
163
136
164
class PGPEngine(object):
137
165
"""A simple class for OpenPGP symmetric encryption & decryption"""
166
138
167
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
140
168
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
141
self.gnupg = GnuPGInterface.GnuPG()
142
self.gnupg.options.meta_interactive = False
143
self.gnupg.options.homedir = self.tempdir
144
self.gnupg.options.extra_args.extend(['--force-mdc',
145
'--quiet',
146
'--no-use-agent'])
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']
147
185
148
186
def __enter__(self):
149
187
return self
150
188
151
def __exit__ (self, exc_type, exc_value, traceback):
189
def __exit__(self, exc_type, exc_value, traceback):
152
190
self._cleanup()
153
191
return False
154
192
171
209
def password_encode(self, password):
172
210
# Passphrase can not be empty and can not contain newlines or
173
211
# NUL bytes. So we prefix it and hex encode it.
174
return b"mandos" + binascii.hexlify(password)
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
175
219
176
220
def encrypt(self, data, password):
177
self.gnupg.passphrase = self.password_encode(password)
178
with open(os.devnull) as devnull:
179
try:
180
proc = self.gnupg.run(['--symmetric'],
181
create_fhs=['stdin', 'stdout'],
182
attach_fhs={'stderr': devnull})
183
with contextlib.closing(proc.handles['stdin']) as f:
184
f.write(data)
185
with contextlib.closing(proc.handles['stdout']) as f:
186
ciphertext = f.read()
187
proc.wait()
188
except IOError as e:
189
raise PGPError(e)
190
self.gnupg.passphrase = None
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)
191
236
return ciphertext
192
237
193
238
def decrypt(self, data, password):
194
self.gnupg.passphrase = self.password_encode(password)
195
with open(os.devnull) as devnull:
196
try:
197
proc = self.gnupg.run(['--decrypt'],
198
create_fhs=['stdin', 'stdout'],
199
attach_fhs={'stderr': devnull})
200
with contextlib.closing(proc.handles['stdin'] ) as f:
201
f.write(data)
202
with contextlib.closing(proc.handles['stdout']) as f:
203
decrypted_plaintext = f.read()
204
proc.wait()
205
except IOError as e:
206
raise PGPError(e)
207
self.gnupg.passphrase = None
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)
208
254
return decrypted_plaintext
209
255
210
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()
211
280
212
281
class AvahiError(Exception):
213
282
def __init__(self, value, *args, **kwargs):
214
283
self.value = value
215
super(AvahiError, self).__init__(value, *args, **kwargs)
216
def __unicode__(self):
217
return unicode(repr(self.value))
284
return super(AvahiError, self).__init__(value, *args,
285
**kwargs)
286
218
287
219
288
class AvahiServiceError(AvahiError):
220
289
pass
221
290
291
222
292
class AvahiGroupError(AvahiError):
223
293
pass
224
294
231
301
Used to optionally bind to the specified interface.
232
302
name: string; Example: 'Mandos'
233
303
type: string; Example: '_mandos._tcp'.
234
See <http://www.dns-sd.org/ServiceTypes.html>
304
See <https://www.iana.org/assignments/service-names-port-numbers>
235
305
port: integer; what port to announce
236
306
TXT: list of strings; TXT record for the service
237
307
domain: string; Domain to publish on, default to .local if empty.
243
313
server: D-Bus Server
244
314
bus: dbus.SystemBus()
245
315
"""
246
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
247
servicetype = None, port = None, TXT = None,
248
domain = "", host = "", max_renames = 32768,
249
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):
250
328
self.interface = interface
251
329
self.name = name
252
330
self.type = servicetype
261
339
self.server = None
262
340
self.bus = bus
263
341
self.entry_group_state_changed_match = None
264
def rename(self):
342
343
def rename(self, remove=True):
265
344
"""Derived from the Avahi example code"""
266
345
if self.rename_count >= self.max_renames:
267
346
logger.critical("No suitable Zeroconf service name found"
268
347
" after %i retries, exiting.",
269
348
self.rename_count)
270
349
raise AvahiServiceError("Too many renames")
271
self.name = unicode(self.server
272
.GetAlternativeServiceName(self.name))
350
self.name = str(
351
self.server.GetAlternativeServiceName(self.name))
352
self.rename_count += 1
273
353
logger.info("Changing Zeroconf service name to %r ...",
274
354
self.name)
275
self.remove()
355
if remove:
356
self.remove()
276
357
try:
277
358
self.add()
278
359
except dbus.exceptions.DBusException as error:
279
logger.critical("DBusException: %s", error)
280
self.cleanup()
281
os._exit(1)
282
self.rename_count += 1
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
283
369
def remove(self):
284
370
"""Derived from the Avahi example code"""
285
371
if self.entry_group_state_changed_match is not None:
287
373
self.entry_group_state_changed_match = None
288
374
if self.group is not None:
289
375
self.group.Reset()
376
290
377
def add(self):
291
378
"""Derived from the Avahi example code"""
292
379
self.remove()
309
396
dbus.UInt16(self.port),
310
397
avahi.string_array_to_txt_array(self.TXT))
311
398
self.group.Commit()
399
312
400
def entry_group_state_changed(self, state, error):
313
401
"""Derived from the Avahi example code"""
314
402
logger.debug("Avahi entry group state change: %i", state)
320
408
self.rename()
321
409
elif state == avahi.ENTRY_GROUP_FAILURE:
322
410
logger.critical("Avahi: Error in group state changed %s",
323
unicode(error))
324
raise AvahiGroupError("State changed: %s"
325
% unicode(error))
411
str(error))
412
raise AvahiGroupError("State changed: {!s}".format(error))
413
326
414
def cleanup(self):
327
415
"""Derived from the Avahi example code"""
328
416
if self.group is not None:
333
421
pass
334
422
self.group = None
335
423
self.remove()
424
336
425
def server_state_changed(self, state, error=None):
337
426
"""Derived from the Avahi example code"""
338
427
logger.debug("Avahi server state change: %i", state)
339
bad_states = { avahi.SERVER_INVALID:
340
"Zeroconf server invalid",
341
avahi.SERVER_REGISTERING: None,
342
avahi.SERVER_COLLISION:
343
"Zeroconf server name collision",
344
avahi.SERVER_FAILURE:
345
"Zeroconf server failure" }
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
}
346
434
if state in bad_states:
347
435
if bad_states[state] is not None:
348
436
if error is None:
351
439
logger.error(bad_states[state] + ": %r", error)
352
440
self.cleanup()
353
441
elif state == avahi.SERVER_RUNNING:
354
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)
355
454
else:
356
455
if error is None:
357
456
logger.debug("Unknown state: %r", state)
358
457
else:
359
458
logger.debug("Unknown state: %r: %r", state, error)
459
360
460
def activate(self):
361
461
"""Derived from the Avahi example code"""
362
462
if self.server is None:
366
466
follow_name_owner_changes=True),
367
467
avahi.DBUS_INTERFACE_SERVER)
368
468
self.server.connect_to_signal("StateChanged",
369
self.server_state_changed)
469
self.server_state_changed)
370
470
self.server_state_changed(self.server.GetState())
371
471
472
372
473
class AvahiServiceToSyslog(AvahiService):
373
def rename(self):
474
def rename(self, *args, **kwargs):
374
475
"""Add the new name to the syslog messages"""
375
ret = AvahiService.rename(self)
376
syslogger.setFormatter(logging.Formatter
377
('Mandos (%s) [%%(process)d]:'
378
' %%(levelname)s: %%(message)s'
379
% self.name))
476
ret = AvahiService.rename(self, *args, **kwargs)
477
syslogger.setFormatter(logging.Formatter(
478
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
479
.format(self.name)))
380
480
return ret
381
481
382
def timedelta_to_milliseconds(td):
383
"Convert a datetime.timedelta() to milliseconds"
384
return ((td.days * 24 * 60 * 60 * 1000)
385
+ (td.seconds * 1000)
386
+ (td.microseconds // 1000))
387
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
388
747
class Client(object):
389
748
"""A representation of a client host served by this server.
390
749
395
754
checker: subprocess.Popen(); a running checker process used
396
755
to see if the client lives.
397
756
'None' if no process is running.
398
checker_callback_tag: a gobject event source tag, or None
757
checker_callback_tag: a GLib event source tag, or None
399
758
checker_command: string; External command which is run to check
400
759
if client lives. %() expansions are done at
401
760
runtime with vars(self) as dict, so that for
402
761
instance %(name)s can be used in the command.
403
checker_initiator_tag: a gobject event source tag, or None
762
checker_initiator_tag: a GLib event source tag, or None
404
763
created: datetime.datetime(); (UTC) object creation
405
764
client_structure: Object describing what attributes a client has
406
765
and is used for storing the client at exit
407
766
current_checker_command: string; current running checker_command
408
disable_initiator_tag: a gobject event source tag, or None
767
disable_initiator_tag: a GLib event source tag, or None
409
768
enabled: bool()
410
769
fingerprint: string (40 or 32 hexadecimal digits); used to
411
770
uniquely identify the client
416
775
last_checker_status: integer between 0 and 255 reflecting exit
417
776
status of last checker. -1 reflects crashed
418
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
419
780
last_enabled: datetime.datetime(); (UTC) or None
420
781
name: string; from the config file, used in log messages and
421
782
D-Bus identifiers
426
787
runtime_expansions: Allowed attributes for runtime expansion.
427
788
expires: datetime.datetime(); time (UTC) when a client will be
428
789
disabled, or None
790
server_settings: The server_settings dict from main()
429
791
"""
430
792
431
793
runtime_expansions = ("approval_delay", "approval_duration",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
794
"created", "enabled", "expires",
795
"fingerprint", "host", "interval",
796
"last_approval_request", "last_checked_ok",
434
797
"last_enabled", "name", "timeout")
435
client_defaults = { "timeout": "5m",
436
"extended_timeout": "15m",
437
"interval": "2m",
438
"checker": "fping -q -- %%(host)s",
439
"host": "",
440
"approval_delay": "0s",
441
"approval_duration": "1s",
442
"approved_by_default": "True",
443
"enabled": "True",
444
}
445
446
def timeout_milliseconds(self):
447
"Return the 'timeout' attribute in milliseconds"
448
return timedelta_to_milliseconds(self.timeout)
449
450
def extended_timeout_milliseconds(self):
451
"Return the 'extended_timeout' attribute in milliseconds"
452
return timedelta_to_milliseconds(self.extended_timeout)
453
454
def interval_milliseconds(self):
455
"Return the 'interval' attribute in milliseconds"
456
return timedelta_to_milliseconds(self.interval)
457
458
def approval_delay_milliseconds(self):
459
return timedelta_to_milliseconds(self.approval_delay)
460
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
461
810
@staticmethod
462
811
def config_parser(config):
463
812
"""Construct a new dict of client settings of this form:
478
827
client["enabled"] = config.getboolean(client_name,
479
828
"enabled")
480
829
830
# Uppercase and remove spaces from fingerprint for later
831
# comparison purposes with return value from the
832
# fingerprint() function
481
833
client["fingerprint"] = (section["fingerprint"].upper()
482
834
.replace(" ", ""))
483
835
if "secret" in section:
484
client["secret"] = section["secret"].decode("base64")
836
client["secret"] = codecs.decode(section["secret"]
837
.encode("utf-8"),
838
"base64")
485
839
elif "secfile" in section:
486
840
with open(os.path.expanduser(os.path.expandvars
487
841
(section["secfile"])),
488
842
"rb") as secfile:
489
843
client["secret"] = secfile.read()
490
844
else:
491
raise TypeError("No secret or secfile for section %s"
492
% section)
845
raise TypeError("No secret or secfile for section {}"
846
.format(section))
493
847
client["timeout"] = string_to_delta(section["timeout"])
494
848
client["extended_timeout"] = string_to_delta(
495
849
section["extended_timeout"])
504
858
client["last_checker_status"] = -2
505
859
506
860
return settings
507
508
509
def __init__(self, settings, name = None):
510
"""Note: the 'checker' key in 'config' sets the
511
'checker_command' attribute and *not* the 'checker'
512
attribute."""
861
862
def __init__(self, settings, name = None, server_settings=None):
513
863
self.name = name
864
if server_settings is None:
865
server_settings = {}
866
self.server_settings = server_settings
514
867
# adding all client settings
515
for setting, value in settings.iteritems():
868
for setting, value in settings.items():
516
869
setattr(self, setting, value)
517
870
518
871
if self.enabled:
524
877
else:
525
878
self.last_enabled = None
526
879
self.expires = None
527
880
528
881
logger.debug("Creating client %r", self.name)
529
# Uppercase and remove spaces from fingerprint for later
530
# comparison purposes with return value from the fingerprint()
531
# function
532
882
logger.debug(" Fingerprint: %s", self.fingerprint)
533
883
self.created = settings.get("created",
534
884
datetime.datetime.utcnow())
535
885
536
886
# attributes specific for this server instance
537
887
self.checker = None
538
888
self.checker_initiator_tag = None
541
891
self.current_checker_command = None
542
892
self.approved = None
543
893
self.approvals_pending = 0
544
self.changedstate = (multiprocessing_manager
545
.Condition(multiprocessing_manager
546
.Lock()))
547
self.client_structure = [attr for attr in
548
self.__dict__.iterkeys()
894
self.changedstate = multiprocessing_manager.Condition(
895
multiprocessing_manager.Lock())
896
self.client_structure = [attr
897
for attr in self.__dict__.keys()
549
898
if not attr.startswith("_")]
550
899
self.client_structure.append("client_structure")
551
900
552
for name, t in inspect.getmembers(type(self),
553
lambda obj:
554
isinstance(obj,
555
property)):
901
for name, t in inspect.getmembers(
902
type(self), lambda obj: isinstance(obj, property)):
556
903
if not name.startswith("_"):
557
904
self.client_structure.append(name)
558
905
566
913
if getattr(self, "enabled", False):
567
914
# Already enabled
568
915
return
569
self.send_changedstate()
570
916
self.expires = datetime.datetime.utcnow() + self.timeout
571
917
self.enabled = True
572
918
self.last_enabled = datetime.datetime.utcnow()
573
919
self.init_checker()
920
self.send_changedstate()
574
921
575
922
def disable(self, quiet=True):
576
923
"""Disable this client."""
577
924
if not getattr(self, "enabled", False):
578
925
return False
579
926
if not quiet:
580
self.send_changedstate()
581
if not quiet:
582
927
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", False):
584
gobject.source_remove(self.disable_initiator_tag)
928
if getattr(self, "disable_initiator_tag", None) is not None:
929
GLib.source_remove(self.disable_initiator_tag)
585
930
self.disable_initiator_tag = None
586
931
self.expires = None
587
if getattr(self, "checker_initiator_tag", False):
588
gobject.source_remove(self.checker_initiator_tag)
932
if getattr(self, "checker_initiator_tag", None) is not None:
933
GLib.source_remove(self.checker_initiator_tag)
589
934
self.checker_initiator_tag = None
590
935
self.stop_checker()
591
936
self.enabled = False
592
# Do not run this again if called by a gobject.timeout_add
937
if not quiet:
938
self.send_changedstate()
939
# Do not run this again if called by a GLib.timeout_add
593
940
return False
594
941
595
942
def __del__(self):
598
945
def init_checker(self):
599
946
# Schedule a new checker to be started an 'interval' from now,
600
947
# and every interval from then on.
601
self.checker_initiator_tag = (gobject.timeout_add
602
(self.interval_milliseconds(),
603
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)
604
953
# Schedule a disable() when 'timeout' has passed
605
self.disable_initiator_tag = (gobject.timeout_add
606
(self.timeout_milliseconds(),
607
self.disable))
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)
608
958
# Also start a new checker *right now*.
609
959
self.start_checker()
610
960
611
def checker_callback(self, pid, condition, command):
961
def checker_callback(self, source, condition, connection,
962
command):
612
963
"""The checker has completed, so take appropriate actions."""
613
964
self.checker_callback_tag = None
614
965
self.checker = None
615
if os.WIFEXITED(condition):
616
self.last_checker_status = os.WEXITSTATUS(condition)
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
617
973
if self.last_checker_status == 0:
618
974
logger.info("Checker for %(name)s succeeded",
619
975
vars(self))
620
976
self.checked_ok()
621
977
else:
622
logger.info("Checker for %(name)s failed",
623
vars(self))
978
logger.info("Checker for %(name)s failed", vars(self))
624
979
else:
625
980
self.last_checker_status = -1
981
self.last_checker_signal = -returncode
626
982
logger.warning("Checker for %(name)s crashed?",
627
983
vars(self))
984
return False
628
985
629
986
def checked_ok(self):
630
987
"""Assert that the client has been seen, alive and well."""
631
988
self.last_checked_ok = datetime.datetime.utcnow()
632
989
self.last_checker_status = 0
990
self.last_checker_signal = None
633
991
self.bump_timeout()
634
992
635
993
def bump_timeout(self, timeout=None):
637
995
if timeout is None:
638
996
timeout = self.timeout
639
997
if self.disable_initiator_tag is not None:
640
gobject.source_remove(self.disable_initiator_tag)
998
GLib.source_remove(self.disable_initiator_tag)
999
self.disable_initiator_tag = None
641
1000
if getattr(self, "enabled", False):
642
self.disable_initiator_tag = (gobject.timeout_add
643
(timedelta_to_milliseconds
644
(timeout), self.disable))
1001
self.disable_initiator_tag = GLib.timeout_add(
1002
int(timeout.total_seconds() * 1000), self.disable)
645
1003
self.expires = datetime.datetime.utcnow() + timeout
646
1004
647
1005
def need_approval(self):
653
1011
If a checker already exists, leave it running and do
654
1012
nothing."""
655
1013
# The reason for not killing a running checker is that if we
656
# did that, then if a checker (for some reason) started
657
# running slowly and taking more than 'interval' time, the
658
# client would inevitably timeout, since no checker would get
659
# 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
660
1018
# checkers alone, the checker would have to take more time
661
1019
# than 'timeout' for the client to be disabled, which is as it
662
1020
# should be.
663
1021
664
# If a checker exists, make sure it is not a zombie
665
try:
666
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
667
except (AttributeError, OSError) as error:
668
if (isinstance(error, OSError)
669
and error.errno != errno.ECHILD):
670
raise error
671
else:
672
if pid:
673
logger.warning("Checker was a zombie")
674
gobject.source_remove(self.checker_callback_tag)
675
self.checker_callback(pid, status,
676
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
677
1026
# Start a new checker if needed
678
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 }
679
1032
try:
680
# In case checker_command has exactly one % operator
681
command = self.checker_command % self.host
682
except TypeError:
683
# Escape attributes for the shell
684
escaped_attrs = dict(
685
(attr,
686
re.escape(unicode(str(getattr(self, attr, "")),
687
errors=
688
'replace')))
689
for attr in
690
self.runtime_expansions)
691
692
try:
693
command = self.checker_command % escaped_attrs
694
except TypeError as error:
695
logger.error('Could not format string "%s":'
696
' %s', self.checker_command, error)
697
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
698
1039
self.current_checker_command = command
699
try:
700
logger.info("Starting checker %r for %s",
701
command, self.name)
702
# We don't need to redirect stdout and stderr, since
703
# in normal mode, that is already done by daemon(),
704
# and in debug mode we don't want to. (Stdin is
705
# always replaced by /dev/null.)
706
self.checker = subprocess.Popen(command,
707
close_fds=True,
708
shell=True, cwd="/")
709
self.checker_callback_tag = (gobject.child_watch_add
710
(self.checker.pid,
711
self.checker_callback,
712
data=command))
713
# The checker may have completed before the gobject
714
# watch was added. Check for this.
715
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
716
if pid:
717
gobject.source_remove(self.checker_callback_tag)
718
self.checker_callback(pid, status, command)
719
except OSError as error:
720
logger.error("Failed to start subprocess: %s",
721
error)
722
# 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
723
1066
return True
724
1067
725
1068
def stop_checker(self):
726
1069
"""Force the checker process, if any, to stop."""
727
1070
if self.checker_callback_tag:
728
gobject.source_remove(self.checker_callback_tag)
1071
GLib.source_remove(self.checker_callback_tag)
729
1072
self.checker_callback_tag = None
730
1073
if getattr(self, "checker", None) is None:
731
1074
return
732
1075
logger.debug("Stopping checker for %(name)s", vars(self))
733
try:
734
os.kill(self.checker.pid, signal.SIGTERM)
735
#time.sleep(0.5)
736
#if self.checker.poll() is None:
737
# os.kill(self.checker.pid, signal.SIGKILL)
738
except OSError as error:
739
if error.errno != errno.ESRCH: # No such process
740
raise
1076
self.checker.terminate()
741
1077
self.checker = None
742
1078
743
1079
744
def dbus_service_property(dbus_interface, signature="v",
745
access="readwrite", byte_arrays=False):
1080
def dbus_service_property(dbus_interface,
1081
signature="v",
1082
access="readwrite",
1083
byte_arrays=False):
746
1084
"""Decorators for marking methods of a DBusObjectWithProperties to
747
1085
become properties on the D-Bus.
748
1086
757
1095
# "Set" method, so we fail early here:
758
1096
if byte_arrays and signature != "ay":
759
1097
raise ValueError("Byte arrays not supported for non-'ay'"
760
" signature %r" % signature)
1098
" signature {!r}".format(signature))
1099
761
1100
def decorator(func):
762
1101
func._dbus_is_property = True
763
1102
func._dbus_interface = dbus_interface
768
1107
func._dbus_name = func._dbus_name[:-14]
769
1108
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
770
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
771
1154
return decorator
772
1155
773
1156
774
1157
class DBusPropertyException(dbus.exceptions.DBusException):
775
1158
"""A base class for D-Bus property-related exceptions
776
1159
"""
777
def __unicode__(self):
778
return unicode(str(self))
1160
pass
779
1161
780
1162
781
1163
class DBusPropertyAccessException(DBusPropertyException):
790
1172
pass
791
1173
792
1174
793
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):
794
1265
"""A D-Bus object with properties.
795
1266
796
1267
Classes inheriting from this can use the dbus_service_property
798
1269
standard Get(), Set(), and GetAll() methods on the D-Bus.
799
1270
"""
800
1271
801
@staticmethod
802
def _is_dbus_property(obj):
803
return getattr(obj, "_dbus_is_property", False)
804
805
def _get_all_dbus_properties(self):
806
"""Returns a generator of (name, attribute) pairs
807
"""
808
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
809
for cls in self.__class__.__mro__
810
for name, prop in
811
inspect.getmembers(cls, self._is_dbus_property))
812
813
1272
def _get_dbus_property(self, interface_name, property_name):
814
1273
"""Returns a bound method if one exists which is a D-Bus
815
1274
property with the specified name and interface.
816
1275
"""
817
for cls in self.__class__.__mro__:
818
for name, value in (inspect.getmembers
819
(cls, self._is_dbus_property)):
1276
for cls in self.__class__.__mro__:
1277
for name, value in inspect.getmembers(
1278
cls, self._is_dbus_thing("property")):
820
1279
if (value._dbus_name == property_name
821
1280
and value._dbus_interface == interface_name):
822
1281
return value.__get__(self)
823
1282
824
1283
# No such property
825
raise DBusPropertyNotFound(self.dbus_object_path + ":"
826
+ interface_name + "."
827
+ property_name)
828
829
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
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",
830
1298
out_signature="v")
831
1299
def Get(self, interface_name, property_name):
832
1300
"""Standard D-Bus property Get() method, see D-Bus standard.
850
1318
# The byte_arrays option is not supported yet on
851
1319
# signatures other than "ay".
852
1320
if prop._dbus_signature != "ay":
853
raise ValueError
1321
raise ValueError("Byte arrays not supported for non-"
1322
"'ay' signature {!r}"
1323
.format(prop._dbus_signature))
854
1324
value = dbus.ByteArray(b''.join(chr(byte)
855
1325
for byte in value))
856
1326
prop(value)
857
1327
858
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1328
@dbus.service.method(dbus.PROPERTIES_IFACE,
1329
in_signature="s",
859
1330
out_signature="a{sv}")
860
1331
def GetAll(self, interface_name):
861
1332
"""Standard D-Bus property GetAll() method, see D-Bus
864
1335
Note: Will not include properties with access="write".
865
1336
"""
866
1337
properties = {}
867
for name, prop in self._get_all_dbus_properties():
1338
for name, prop in self._get_all_dbus_things("property"):
868
1339
if (interface_name
869
1340
and interface_name != prop._dbus_interface):
870
1341
# Interface non-empty but did not match
876
1347
if not hasattr(value, "variant_level"):
877
1348
properties[name] = value
878
1349
continue
879
properties[name] = type(value)(value, variant_level=
880
value.variant_level+1)
1350
properties[name] = type(value)(
1351
value, variant_level = value.variant_level + 1)
881
1352
return dbus.Dictionary(properties, signature="sv")
882
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
1361
883
1362
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
884
1363
out_signature="s",
885
1364
path_keyword='object_path',
886
1365
connection_keyword='connection')
887
1366
def Introspect(self, object_path, connection):
888
"""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.
889
1370
"""
890
xmlstring = dbus.service.Object.Introspect(self, object_path,
891
connection)
1371
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1372
object_path,
1373
connection)
892
1374
try:
893
1375
document = xml.dom.minidom.parseString(xmlstring)
1376
894
1377
def make_tag(document, name, prop):
895
1378
e = document.createElement("property")
896
1379
e.setAttribute("name", name)
897
1380
e.setAttribute("type", prop._dbus_signature)
898
1381
e.setAttribute("access", prop._dbus_access)
899
1382
return e
1383
900
1384
for if_tag in document.getElementsByTagName("interface"):
1385
# Add property tags
901
1386
for tag in (make_tag(document, name, prop)
902
1387
for name, prop
903
in self._get_all_dbus_properties()
1388
in self._get_all_dbus_things("property")
904
1389
if prop._dbus_interface
905
1390
== if_tag.getAttribute("name")):
906
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)
907
1408
# Add the names to the return values for the
908
1409
# "org.freedesktop.DBus.Properties" methods
909
1410
if (if_tag.getAttribute("name")
924
1425
except (AttributeError, xml.dom.DOMException,
925
1426
xml.parsers.expat.ExpatError) as error:
926
1427
logger.error("Failed to override Introspection method",
927
error)
928
return xmlstring
929
930
931
def datetime_to_dbus (dt, variant_level=0):
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):
932
1501
"""Convert a UTC datetime.datetime() to a D-Bus type."""
933
1502
if dt is None:
934
1503
return dbus.String("", variant_level = variant_level)
935
return dbus.String(dt.isoformat(),
936
variant_level=variant_level)
937
938
939
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
940
.__metaclass__):
941
"""Applied to an empty subclass of a D-Bus object, this metaclass
942
will add additional D-Bus attributes matching a certain pattern.
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).
943
1529
"""
944
def __new__(mcs, name, bases, attr):
945
# Go through all the base classes which could have D-Bus
946
# methods, signals, or properties in them
947
for base in (b for b in bases
948
if issubclass(b, dbus.service.Object)):
949
# Go though all attributes of the base class
950
for attrname, attribute in inspect.getmembers(base):
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):
951
1538
# Ignore non-D-Bus attributes, and D-Bus attributes
952
1539
# with the wrong interface name
953
1540
if (not hasattr(attribute, "_dbus_interface")
954
or not attribute._dbus_interface
955
.startswith("se.recompile.Mandos")):
1541
or not attribute._dbus_interface.startswith(
1542
orig_interface_name)):
956
1543
continue
957
1544
# Create an alternate D-Bus interface name based on
958
1545
# the current name
959
alt_interface = (attribute._dbus_interface
960
.replace("se.recompile.Mandos",
961
"se.bsnet.fukt.Mandos"))
1546
alt_interface = attribute._dbus_interface.replace(
1547
orig_interface_name, alt_interface_name)
1548
interface_names.add(alt_interface)
962
1549
# Is this a D-Bus signal?
963
1550
if getattr(attribute, "_dbus_is_signal", False):
964
# Extract the original non-method function by
965
# black magic
966
nonmethod_func = (dict(
1551
# Extract the original non-method undecorated
1552
# function by black magic
1553
if sys.version_info.major == 2:
1554
nonmethod_func = (dict(
967
1555
zip(attribute.func_code.co_freevars,
968
attribute.__closure__))["func"]
969
.cell_contents)
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)
970
1563
# Create a new, but exactly alike, function
971
1564
# object, and decorate it to be a new D-Bus signal
972
1565
# with the alternate D-Bus interface name
973
new_function = (dbus.service.signal
974
(alt_interface,
975
attribute._dbus_signature)
976
(types.FunctionType(
977
nonmethod_func.func_code,
978
nonmethod_func.func_globals,
979
nonmethod_func.func_name,
980
nonmethod_func.func_defaults,
981
nonmethod_func.func_closure)))
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
982
1576
# Define a creator of a function to call both the
983
# old and new functions, so both the old and new
984
# signals gets sent when the function is called
1577
# original and alternate functions, so both the
1578
# original and alternate signals gets sent when
1579
# the function is called
985
1580
def fixscope(func1, func2):
986
1581
"""This function is a scope container to pass
987
1582
func1 and func2 to the "call_both" function
988
1583
outside of its arguments"""
1584
1585
@functools.wraps(func2)
989
1586
def call_both(*args, **kwargs):
990
1587
"""This function will emit two D-Bus
991
1588
signals by calling func1 and func2"""
992
1589
func1(*args, **kwargs)
993
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
994
1596
return call_both
995
1597
# Create the "call_both" function and add it to
996
1598
# the class
997
attr[attrname] = fixscope(attribute,
998
new_function)
1599
attr[attrname] = fixscope(attribute, new_function)
999
1600
# Is this a D-Bus method?
1000
1601
elif getattr(attribute, "_dbus_is_method", False):
1001
1602
# Create a new, but exactly alike, function
1002
1603
# object. Decorate it to be a new D-Bus method
1003
1604
# with the alternate D-Bus interface name. Add it
1004
1605
# to the class.
1005
attr[attrname] = (dbus.service.method
1006
(alt_interface,
1007
attribute._dbus_in_signature,
1008
attribute._dbus_out_signature)
1009
(types.FunctionType
1010
(attribute.func_code,
1011
attribute.func_globals,
1012
attribute.func_name,
1013
attribute.func_defaults,
1014
attribute.func_closure)))
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
1015
1618
# Is this a D-Bus property?
1016
1619
elif getattr(attribute, "_dbus_is_property", False):
1017
1620
# Create a new, but exactly alike, function
1018
1621
# object, and decorate it to be a new D-Bus
1019
1622
# property with the alternate D-Bus interface
1020
1623
# name. Add it to the class.
1021
attr[attrname] = (dbus_service_property
1022
(alt_interface,
1023
attribute._dbus_signature,
1024
attribute._dbus_access,
1025
attribute
1026
._dbus_get_args_options
1027
["byte_arrays"])
1028
(types.FunctionType
1029
(attribute.func_code,
1030
attribute.func_globals,
1031
attribute.func_name,
1032
attribute.func_defaults,
1033
attribute.func_closure)))
1034
return type.__new__(mcs, name, bases, attr)
1035
1036
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"})
1037
1676
class ClientDBus(Client, DBusObjectWithProperties):
1038
1677
"""A Client class using D-Bus
1039
1678
1043
1682
"""
1044
1683
1045
1684
runtime_expansions = (Client.runtime_expansions
1046
+ ("dbus_object_path",))
1685
+ ("dbus_object_path", ))
1686
1687
_interface = "se.recompile.Mandos.Client"
1047
1688
1048
1689
# dbus.service.Object doesn't use super(), so we can't either.
1049
1690
1052
1693
Client.__init__(self, *args, **kwargs)
1053
1694
# Only now, when this client is initialized, can it show up on
1054
1695
# the D-Bus
1055
client_object_name = unicode(self.name).translate(
1696
client_object_name = str(self.name).translate(
1056
1697
{ord("."): ord("_"),
1057
1698
ord("-"): ord("_")})
1058
self.dbus_object_path = (dbus.ObjectPath
1059
("/clients/" + client_object_name))
1699
self.dbus_object_path = dbus.ObjectPath(
1700
"/clients/" + client_object_name)
1060
1701
DBusObjectWithProperties.__init__(self, self.bus,
1061
1702
self.dbus_object_path)
1062
1063
def notifychangeproperty(transform_func,
1064
dbus_name, type_func=lambda x: x,
1065
variant_level=1):
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):
1066
1709
""" Modify a variable so that it's a property which announces
1067
1710
its changes to DBus.
1068
1711
1073
1716
to the D-Bus. Default: no transform
1074
1717
variant_level: D-Bus variant level. Default: 1
1075
1718
"""
1076
attrname = "_{0}".format(dbus_name)
1719
attrname = "_{}".format(dbus_name)
1720
1077
1721
def setter(self, value):
1078
1722
if hasattr(self, "dbus_object_path"):
1079
1723
if (not hasattr(self, attrname) or
1080
1724
type_func(getattr(self, attrname, None))
1081
1725
!= type_func(value)):
1082
dbus_value = transform_func(type_func(value),
1083
variant_level
1084
=variant_level)
1085
self.PropertyChanged(dbus.String(dbus_name),
1086
dbus_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())
1087
1741
setattr(self, attrname, value)
1088
1742
1089
1743
return property(lambda self: getattr(self, attrname), setter)
1090
1744
1091
1092
1745
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1093
1746
approvals_pending = notifychangeproperty(dbus.Boolean,
1094
1747
"ApprovalPending",
1096
1749
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1097
1750
last_enabled = notifychangeproperty(datetime_to_dbus,
1098
1751
"LastEnabled")
1099
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1100
type_func = lambda checker:
1101
checker is not None)
1752
checker = notifychangeproperty(
1753
dbus.Boolean, "CheckerRunning",
1754
type_func = lambda checker: checker is not None)
1102
1755
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1103
1756
"LastCheckedOK")
1104
1757
last_checker_status = notifychangeproperty(dbus.Int16,
1107
1760
datetime_to_dbus, "LastApprovalRequest")
1108
1761
approved_by_default = notifychangeproperty(dbus.Boolean,
1109
1762
"ApprovedByDefault")
1110
approval_delay = notifychangeproperty(dbus.UInt64,
1111
"ApprovalDelay",
1112
type_func =
1113
timedelta_to_milliseconds)
1763
approval_delay = notifychangeproperty(
1764
dbus.UInt64, "ApprovalDelay",
1765
type_func = lambda td: td.total_seconds() * 1000)
1114
1766
approval_duration = notifychangeproperty(
1115
1767
dbus.UInt64, "ApprovalDuration",
1116
type_func = timedelta_to_milliseconds)
1768
type_func = lambda td: td.total_seconds() * 1000)
1117
1769
host = notifychangeproperty(dbus.String, "Host")
1118
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1119
type_func =
1120
timedelta_to_milliseconds)
1770
timeout = notifychangeproperty(
1771
dbus.UInt64, "Timeout",
1772
type_func = lambda td: td.total_seconds() * 1000)
1121
1773
extended_timeout = notifychangeproperty(
1122
1774
dbus.UInt64, "ExtendedTimeout",
1123
type_func = timedelta_to_milliseconds)
1124
interval = notifychangeproperty(dbus.UInt64,
1125
"Interval",
1126
type_func =
1127
timedelta_to_milliseconds)
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)
1128
1779
checker_command = notifychangeproperty(dbus.String, "Checker")
1780
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1781
invalidate_only=True)
1129
1782
1130
1783
del notifychangeproperty
1131
1784
1138
1791
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1139
1792
Client.__del__(self, *args, **kwargs)
1140
1793
1141
def checker_callback(self, pid, condition, command,
1142
*args, **kwargs):
1143
self.checker_callback_tag = None
1144
self.checker = None
1145
if os.WIFEXITED(condition):
1146
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:
1147
1801
# Emit D-Bus signal
1148
1802
self.CheckerCompleted(dbus.Int16(exitstatus),
1149
dbus.Int64(condition),
1803
# This is specific to GNU libC
1804
dbus.Int64(exitstatus << 8),
1150
1805
dbus.String(command))
1151
1806
else:
1152
1807
# Emit D-Bus signal
1153
1808
self.CheckerCompleted(dbus.Int16(-1),
1154
dbus.Int64(condition),
1809
dbus.Int64(
1810
# This is specific to GNU libC
1811
(exitstatus << 8)
1812
| self.last_checker_signal),
1155
1813
dbus.String(command))
1156
1157
return Client.checker_callback(self, pid, condition, command,
1158
*args, **kwargs)
1814
return ret
1159
1815
1160
1816
def start_checker(self, *args, **kwargs):
1161
old_checker = self.checker
1162
if self.checker is not None:
1163
old_checker_pid = self.checker.pid
1164
else:
1165
old_checker_pid = None
1817
old_checker_pid = getattr(self.checker, "pid", None)
1166
1818
r = Client.start_checker(self, *args, **kwargs)
1167
1819
# Only if new checker process was started
1168
1820
if (self.checker is not None
1176
1828
return False
1177
1829
1178
1830
def approve(self, value=True):
1179
self.send_changedstate()
1180
1831
self.approved = value
1181
gobject.timeout_add(timedelta_to_milliseconds
1182
(self.approval_duration),
1183
self._reset_approved)
1184
1832
GLib.timeout_add(int(self.approval_duration.total_seconds()
1833
* 1000), self._reset_approved)
1834
self.send_changedstate()
1185
1835
1186
1836
## D-Bus methods, signals & properties
1187
_interface = "se.recompile.Mandos.Client"
1837
1838
## Interfaces
1188
1839
1189
1840
## Signals
1190
1841
1201
1852
pass
1202
1853
1203
1854
# PropertyChanged - signal
1855
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1204
1856
@dbus.service.signal(_interface, signature="sv")
1205
1857
def PropertyChanged(self, property, value):
1206
1858
"D-Bus signal"
1240
1892
self.checked_ok()
1241
1893
1242
1894
# Enable - method
1895
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1243
1896
@dbus.service.method(_interface)
1244
1897
def Enable(self):
1245
1898
"D-Bus method"
1246
1899
self.enable()
1247
1900
1248
1901
# StartChecker - method
1902
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1249
1903
@dbus.service.method(_interface)
1250
1904
def StartChecker(self):
1251
1905
"D-Bus method"
1252
1906
self.start_checker()
1253
1907
1254
1908
# Disable - method
1909
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1255
1910
@dbus.service.method(_interface)
1256
1911
def Disable(self):
1257
1912
"D-Bus method"
1258
1913
self.disable()
1259
1914
1260
1915
# StopChecker - method
1916
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1261
1917
@dbus.service.method(_interface)
1262
1918
def StopChecker(self):
1263
1919
self.stop_checker()
1270
1926
return dbus.Boolean(bool(self.approvals_pending))
1271
1927
1272
1928
# ApprovedByDefault - property
1273
@dbus_service_property(_interface, signature="b",
1929
@dbus_service_property(_interface,
1930
signature="b",
1274
1931
access="readwrite")
1275
1932
def ApprovedByDefault_dbus_property(self, value=None):
1276
1933
if value is None: # get
1278
1935
self.approved_by_default = bool(value)
1279
1936
1280
1937
# ApprovalDelay - property
1281
@dbus_service_property(_interface, signature="t",
1938
@dbus_service_property(_interface,
1939
signature="t",
1282
1940
access="readwrite")
1283
1941
def ApprovalDelay_dbus_property(self, value=None):
1284
1942
if value is None: # get
1285
return dbus.UInt64(self.approval_delay_milliseconds())
1943
return dbus.UInt64(self.approval_delay.total_seconds()
1944
* 1000)
1286
1945
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1287
1946
1288
1947
# ApprovalDuration - property
1289
@dbus_service_property(_interface, signature="t",
1948
@dbus_service_property(_interface,
1949
signature="t",
1290
1950
access="readwrite")
1291
1951
def ApprovalDuration_dbus_property(self, value=None):
1292
1952
if value is None: # get
1293
return dbus.UInt64(timedelta_to_milliseconds(
1294
self.approval_duration))
1953
return dbus.UInt64(self.approval_duration.total_seconds()
1954
* 1000)
1295
1955
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1296
1956
1297
1957
# Name - property
1958
@dbus_annotations(
1959
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1298
1960
@dbus_service_property(_interface, signature="s", access="read")
1299
1961
def Name_dbus_property(self):
1300
1962
return dbus.String(self.name)
1301
1963
1302
1964
# Fingerprint - property
1965
@dbus_annotations(
1966
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1303
1967
@dbus_service_property(_interface, signature="s", access="read")
1304
1968
def Fingerprint_dbus_property(self):
1305
1969
return dbus.String(self.fingerprint)
1306
1970
1307
1971
# Host - property
1308
@dbus_service_property(_interface, signature="s",
1972
@dbus_service_property(_interface,
1973
signature="s",
1309
1974
access="readwrite")
1310
1975
def Host_dbus_property(self, value=None):
1311
1976
if value is None: # get
1312
1977
return dbus.String(self.host)
1313
self.host = unicode(value)
1978
self.host = str(value)
1314
1979
1315
1980
# Created - property
1981
@dbus_annotations(
1982
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1316
1983
@dbus_service_property(_interface, signature="s", access="read")
1317
1984
def Created_dbus_property(self):
1318
1985
return datetime_to_dbus(self.created)
1323
1990
return datetime_to_dbus(self.last_enabled)
1324
1991
1325
1992
# Enabled - property
1326
@dbus_service_property(_interface, signature="b",
1993
@dbus_service_property(_interface,
1994
signature="b",
1327
1995
access="readwrite")
1328
1996
def Enabled_dbus_property(self, value=None):
1329
1997
if value is None: # get
1334
2002
self.disable()
1335
2003
1336
2004
# LastCheckedOK - property
1337
@dbus_service_property(_interface, signature="s",
2005
@dbus_service_property(_interface,
2006
signature="s",
1338
2007
access="readwrite")
1339
2008
def LastCheckedOK_dbus_property(self, value=None):
1340
2009
if value is not None:
1343
2012
return datetime_to_dbus(self.last_checked_ok)
1344
2013
1345
2014
# LastCheckerStatus - property
1346
@dbus_service_property(_interface, signature="n",
1347
access="read")
2015
@dbus_service_property(_interface, signature="n", access="read")
1348
2016
def LastCheckerStatus_dbus_property(self):
1349
2017
return dbus.Int16(self.last_checker_status)
1350
2018
1359
2027
return datetime_to_dbus(self.last_approval_request)
1360
2028
1361
2029
# Timeout - property
1362
@dbus_service_property(_interface, signature="t",
2030
@dbus_service_property(_interface,
2031
signature="t",
1363
2032
access="readwrite")
1364
2033
def Timeout_dbus_property(self, value=None):
1365
2034
if value is None: # get
1366
return dbus.UInt64(self.timeout_milliseconds())
2035
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2036
old_timeout = self.timeout
1367
2037
self.timeout = datetime.timedelta(0, 0, 0, value)
1368
# Reschedule timeout
2038
# Reschedule disabling
1369
2039
if self.enabled:
1370
2040
now = datetime.datetime.utcnow()
1371
time_to_die = timedelta_to_milliseconds(
1372
(self.last_checked_ok + self.timeout) - now)
1373
if time_to_die <= 0:
2041
self.expires += self.timeout - old_timeout
2042
if self.expires <= now:
1374
2043
# The timeout has passed
1375
2044
self.disable()
1376
2045
else:
1377
self.expires = (now +
1378
datetime.timedelta(milliseconds =
1379
time_to_die))
1380
2046
if (getattr(self, "disable_initiator_tag", None)
1381
2047
is None):
1382
2048
return
1383
gobject.source_remove(self.disable_initiator_tag)
1384
self.disable_initiator_tag = (gobject.timeout_add
1385
(time_to_die,
1386
self.disable))
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)
1387
2053
1388
2054
# ExtendedTimeout - property
1389
@dbus_service_property(_interface, signature="t",
2055
@dbus_service_property(_interface,
2056
signature="t",
1390
2057
access="readwrite")
1391
2058
def ExtendedTimeout_dbus_property(self, value=None):
1392
2059
if value is None: # get
1393
return dbus.UInt64(self.extended_timeout_milliseconds())
2060
return dbus.UInt64(self.extended_timeout.total_seconds()
2061
* 1000)
1394
2062
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1395
2063
1396
2064
# Interval - property
1397
@dbus_service_property(_interface, signature="t",
2065
@dbus_service_property(_interface,
2066
signature="t",
1398
2067
access="readwrite")
1399
2068
def Interval_dbus_property(self, value=None):
1400
2069
if value is None: # get
1401
return dbus.UInt64(self.interval_milliseconds())
2070
return dbus.UInt64(self.interval.total_seconds() * 1000)
1402
2071
self.interval = datetime.timedelta(0, 0, 0, value)
1403
2072
if getattr(self, "checker_initiator_tag", None) is None:
1404
2073
return
1405
2074
if self.enabled:
1406
2075
# Reschedule checker run
1407
gobject.source_remove(self.checker_initiator_tag)
1408
self.checker_initiator_tag = (gobject.timeout_add
1409
(value, self.start_checker))
1410
self.start_checker() # Start one now, too
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
1411
2080
1412
2081
# Checker - property
1413
@dbus_service_property(_interface, signature="s",
2082
@dbus_service_property(_interface,
2083
signature="s",
1414
2084
access="readwrite")
1415
2085
def Checker_dbus_property(self, value=None):
1416
2086
if value is None: # get
1417
2087
return dbus.String(self.checker_command)
1418
self.checker_command = unicode(value)
2088
self.checker_command = str(value)
1419
2089
1420
2090
# CheckerRunning - property
1421
@dbus_service_property(_interface, signature="b",
2091
@dbus_service_property(_interface,
2092
signature="b",
1422
2093
access="readwrite")
1423
2094
def CheckerRunning_dbus_property(self, value=None):
1424
2095
if value is None: # get
1429
2100
self.stop_checker()
1430
2101
1431
2102
# ObjectPath - property
2103
@dbus_annotations(
2104
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2105
"org.freedesktop.DBus.Deprecated": "true"})
1432
2106
@dbus_service_property(_interface, signature="o", access="read")
1433
2107
def ObjectPath_dbus_property(self):
1434
2108
return self.dbus_object_path # is already a dbus.ObjectPath
1435
2109
1436
2110
# Secret = property
1437
@dbus_service_property(_interface, signature="ay",
1438
access="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)
1439
2118
def Secret_dbus_property(self, value):
1440
self.secret = str(value)
2119
self.secret = bytes(value)
1441
2120
1442
2121
del _interface
1443
2122
1447
2126
self._pipe = child_pipe
1448
2127
self._pipe.send(('init', fpr, address))
1449
2128
if not self._pipe.recv():
1450
raise KeyError()
2129
raise KeyError(fpr)
1451
2130
1452
2131
def __getattribute__(self, name):
1453
2132
if name == '_pipe':
1457
2136
if data[0] == 'data':
1458
2137
return data[1]
1459
2138
if data[0] == 'function':
2139
1460
2140
def func(*args, **kwargs):
1461
2141
self._pipe.send(('funcall', name, args, kwargs))
1462
2142
return self._pipe.recv()[1]
2143
1463
2144
return func
1464
2145
1465
2146
def __setattr__(self, name, value):
1468
2149
self._pipe.send(('setattr', name, value))
1469
2150
1470
2151
1471
class ClientDBusTransitional(ClientDBus):
1472
__metaclass__ = AlternateDBusNamesMetaclass
1473
1474
1475
2152
class ClientHandler(socketserver.BaseRequestHandler, object):
1476
2153
"""A class to handle client connections.
1477
2154
1481
2158
def handle(self):
1482
2159
with contextlib.closing(self.server.child_pipe) as child_pipe:
1483
2160
logger.info("TCP connection from: %s",
1484
unicode(self.client_address))
2161
str(self.client_address))
1485
2162
logger.debug("Pipe FD: %d",
1486
2163
self.server.child_pipe.fileno())
1487
2164
1488
session = (gnutls.connection
1489
.ClientSession(self.request,
1490
gnutls.connection
1491
.X509Credentials()))
1492
1493
# Note: gnutls.connection.X509Credentials is really a
1494
# generic GnuTLS certificate credentials object so long as
1495
# no X.509 keys are added to it. Therefore, we can use it
1496
# here despite using OpenPGP certificates.
2165
session = gnutls.ClientSession(self.request)
1497
2166
1498
2167
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1499
2168
# "+AES-256-CBC", "+SHA1",
1503
2172
priority = self.server.gnutls_priority
1504
2173
if priority is None:
1505
2174
priority = "NORMAL"
1506
(gnutls.library.functions
1507
.gnutls_priority_set_direct(session._c_object,
1508
priority, None))
2175
gnutls.priority_set_direct(session._c_object, priority,
2176
None)
1509
2177
1510
2178
# Start communication using the Mandos protocol
1511
2179
# Get protocol number
1513
2181
logger.debug("Protocol version: %r", line)
1514
2182
try:
1515
2183
if int(line.strip().split()[0]) > 1:
1516
raise RuntimeError
2184
raise RuntimeError(line)
1517
2185
except (ValueError, IndexError, RuntimeError) as error:
1518
2186
logger.error("Unknown protocol version: %s", error)
1519
2187
return
1521
2189
# Start GnuTLS connection
1522
2190
try:
1523
2191
session.handshake()
1524
except gnutls.errors.GNUTLSError as error:
2192
except gnutls.Error as error:
1525
2193
logger.warning("Handshake failed: %s", error)
1526
2194
# Do not run session.bye() here: the session is not
1527
2195
# established. Just abandon the request.
1531
2199
approval_required = False
1532
2200
try:
1533
2201
try:
1534
fpr = self.fingerprint(self.peer_certificate
1535
(session))
1536
except (TypeError,
1537
gnutls.errors.GNUTLSError) as error:
2202
fpr = self.fingerprint(
2203
self.peer_certificate(session))
2204
except (TypeError, gnutls.Error) as error:
1538
2205
logger.warning("Bad certificate: %s", error)
1539
2206
return
1540
2207
logger.debug("Fingerprint: %s", fpr)
1553
2220
while True:
1554
2221
if not client.enabled:
1555
2222
logger.info("Client %s is disabled",
1556
client.name)
2223
client.name)
1557
2224
if self.server.use_dbus:
1558
2225
# Emit D-Bus signal
1559
2226
client.Rejected("Disabled")
1568
2235
if self.server.use_dbus:
1569
2236
# Emit D-Bus signal
1570
2237
client.NeedApproval(
1571
client.approval_delay_milliseconds(),
1572
client.approved_by_default)
2238
client.approval_delay.total_seconds()
2239
* 1000, client.approved_by_default)
1573
2240
else:
1574
2241
logger.warning("Client %s was not approved",
1575
2242
client.name)
1581
2248
#wait until timeout or approved
1582
2249
time = datetime.datetime.now()
1583
2250
client.changedstate.acquire()
1584
(client.changedstate.wait
1585
(float(client.timedelta_to_milliseconds(delay)
1586
/ 1000)))
2251
client.changedstate.wait(delay.total_seconds())
1587
2252
client.changedstate.release()
1588
2253
time2 = datetime.datetime.now()
1589
2254
if (time2 - time) >= delay:
1600
2265
else:
1601
2266
delay -= time2 - time
1602
2267
1603
sent_size = 0
1604
while sent_size < len(client.secret):
1605
try:
1606
sent = session.send(client.secret[sent_size:])
1607
except gnutls.errors.GNUTLSError as error:
1608
logger.warning("gnutls send failed")
1609
return
1610
logger.debug("Sent: %d, remaining: %d",
1611
sent, len(client.secret)
1612
- (sent_size + sent))
1613
sent_size += sent
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
1614
2274
1615
2275
logger.info("Sending secret to %s", client.name)
1616
2276
# bump the timeout using extended_timeout
1624
2284
client.approvals_pending -= 1
1625
2285
try:
1626
2286
session.bye()
1627
except gnutls.errors.GNUTLSError as error:
1628
logger.warning("GnuTLS bye failed")
2287
except gnutls.Error as error:
2288
logger.warning("GnuTLS bye failed",
2289
exc_info=error)
1629
2290
1630
2291
@staticmethod
1631
2292
def peer_certificate(session):
1632
2293
"Return the peer's OpenPGP certificate as a bytestring"
1633
2294
# If not an OpenPGP certificate...
1634
if (gnutls.library.functions
1635
.gnutls_certificate_type_get(session._c_object)
1636
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1637
# ...do the normal thing
1638
return session.peer_certificate
2295
if (gnutls.certificate_type_get(session._c_object)
2296
!= gnutls.CRT_OPENPGP):
2297
# ...return invalid data
2298
return b""
1639
2299
list_size = ctypes.c_uint(1)
1640
cert_list = (gnutls.library.functions
1641
.gnutls_certificate_get_peers
2300
cert_list = (gnutls.certificate_get_peers
1642
2301
(session._c_object, ctypes.byref(list_size)))
1643
2302
if not bool(cert_list) and list_size.value != 0:
1644
raise gnutls.errors.GNUTLSError("error getting peer"
1645
" certificate")
2303
raise gnutls.Error("error getting peer certificate")
1646
2304
if list_size.value == 0:
1647
2305
return None
1648
2306
cert = cert_list[0]
1652
2310
def fingerprint(openpgp):
1653
2311
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1654
2312
# New GnuTLS "datum" with the OpenPGP public key
1655
datum = (gnutls.library.types
1656
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1657
ctypes.POINTER
1658
(ctypes.c_ubyte)),
1659
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)))
1660
2317
# New empty GnuTLS certificate
1661
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1662
(gnutls.library.functions
1663
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2318
crt = gnutls.openpgp_crt_t()
2319
gnutls.openpgp_crt_init(ctypes.byref(crt))
1664
2320
# Import the OpenPGP public key into the certificate
1665
(gnutls.library.functions
1666
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1667
gnutls.library.constants
1668
.GNUTLS_OPENPGP_FMT_RAW))
2321
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2322
gnutls.OPENPGP_FMT_RAW)
1669
2323
# Verify the self signature in the key
1670
2324
crtverify = ctypes.c_uint()
1671
(gnutls.library.functions
1672
.gnutls_openpgp_crt_verify_self(crt, 0,
1673
ctypes.byref(crtverify)))
2325
gnutls.openpgp_crt_verify_self(crt, 0,
2326
ctypes.byref(crtverify))
1674
2327
if crtverify.value != 0:
1675
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1676
raise (gnutls.errors.CertificateSecurityError
1677
("Verify failed"))
2328
gnutls.openpgp_crt_deinit(crt)
2329
raise gnutls.CertificateSecurityError("Verify failed")
1678
2330
# New buffer for the fingerprint
1679
2331
buf = ctypes.create_string_buffer(20)
1680
2332
buf_len = ctypes.c_size_t()
1681
2333
# Get the fingerprint from the certificate into the buffer
1682
(gnutls.library.functions
1683
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1684
ctypes.byref(buf_len)))
2334
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2335
ctypes.byref(buf_len))
1685
2336
# Deinit the certificate
1686
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2337
gnutls.openpgp_crt_deinit(crt)
1687
2338
# Convert the buffer to a Python bytestring
1688
2339
fpr = ctypes.string_at(buf, buf_len.value)
1689
2340
# Convert the bytestring to hexadecimal notation
1693
2344
1694
2345
class MultiprocessingMixIn(object):
1695
2346
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2347
1696
2348
def sub_process_main(self, request, address):
1697
2349
try:
1698
2350
self.finish_request(request, address)
1703
2355
def process_request(self, request, address):
1704
2356
"""Start a new process to process the request."""
1705
2357
proc = multiprocessing.Process(target = self.sub_process_main,
1706
args = (request,
1707
address))
2358
args = (request, address))
1708
2359
proc.start()
1709
2360
return proc
1710
2361
1711
2362
1712
2363
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1713
2364
""" adds a pipe to the MixIn """
2365
1714
2366
def process_request(self, request, client_address):
1715
2367
"""Overrides and wraps the original process_request().
1716
2368
1725
2377
1726
2378
def add_pipe(self, parent_pipe, proc):
1727
2379
"""Dummy function; override as necessary"""
1728
raise NotImplementedError
2380
raise NotImplementedError()
1729
2381
1730
2382
1731
2383
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1737
2389
interface: None or a network interface name (string)
1738
2390
use_ipv6: Boolean; to use IPv6 or not
1739
2391
"""
2392
1740
2393
def __init__(self, server_address, RequestHandlerClass,
1741
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
"""
1742
2400
self.interface = interface
1743
2401
if use_ipv6:
1744
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.
1745
2429
socketserver.TCPServer.__init__(self, server_address,
1746
2430
RequestHandlerClass)
2431
1747
2432
def server_bind(self):
1748
2433
"""This overrides the normal server_bind() function
1749
2434
to bind to an interface if one was specified, and also NOT to
1755
2440
self.interface)
1756
2441
else:
1757
2442
try:
1758
self.socket.setsockopt(socket.SOL_SOCKET,
1759
SO_BINDTODEVICE,
1760
str(self.interface
1761
+ '\0'))
2443
self.socket.setsockopt(
2444
socket.SOL_SOCKET, SO_BINDTODEVICE,
2445
(self.interface + "\0").encode("utf-8"))
1762
2446
except socket.error as error:
1763
if error[0] == errno.EPERM:
1764
logger.error("No permission to"
1765
" bind to interface %s",
1766
self.interface)
1767
elif error[0] == errno.ENOPROTOOPT:
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:
1768
2451
logger.error("SO_BINDTODEVICE not available;"
1769
2452
" cannot bind to interface %s",
1770
2453
self.interface)
2454
elif error.errno == errno.ENODEV:
2455
logger.error("Interface %s does not exist,"
2456
" cannot bind", self.interface)
1771
2457
else:
1772
2458
raise
1773
2459
# Only bind(2) the socket if we really need to.
1776
2462
if self.address_family == socket.AF_INET6:
1777
2463
any_address = "::" # in6addr_any
1778
2464
else:
1779
any_address = socket.INADDR_ANY
2465
any_address = "0.0.0.0" # INADDR_ANY
1780
2466
self.server_address = (any_address,
1781
2467
self.server_address[1])
1782
2468
elif not self.server_address[1]:
1783
self.server_address = (self.server_address[0],
1784
0)
2469
self.server_address = (self.server_address[0], 0)
1785
2470
# if self.interface:
1786
2471
# self.server_address = (self.server_address[0],
1787
2472
# 0, # port
1799
2484
gnutls_priority GnuTLS priority string
1800
2485
use_dbus: Boolean; to emit D-Bus signals or not
1801
2486
1802
Assumes a gobject.MainLoop event loop.
2487
Assumes a GLib.MainLoop event loop.
1803
2488
"""
2489
1804
2490
def __init__(self, server_address, RequestHandlerClass,
1805
interface=None, use_ipv6=True, clients=None,
1806
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):
1807
2497
self.enabled = False
1808
2498
self.clients = clients
1809
2499
if self.clients is None:
1813
2503
IPv6_TCPServer.__init__(self, server_address,
1814
2504
RequestHandlerClass,
1815
2505
interface = interface,
1816
use_ipv6 = use_ipv6)
2506
use_ipv6 = use_ipv6,
2507
socketfd = socketfd)
2508
1817
2509
def server_activate(self):
1818
2510
if self.enabled:
1819
2511
return socketserver.TCPServer.server_activate(self)
1823
2515
1824
2516
def add_pipe(self, parent_pipe, proc):
1825
2517
# Call "handle_ipc" for both data and EOF events
1826
gobject.io_add_watch(parent_pipe.fileno(),
1827
gobject.IO_IN | gobject.IO_HUP,
1828
functools.partial(self.handle_ipc,
1829
parent_pipe =
1830
parent_pipe,
1831
proc = proc))
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))
1832
2524
1833
def handle_ipc(self, source, condition, parent_pipe=None,
1834
proc = None, client_object=None):
1835
condition_names = {
1836
gobject.IO_IN: "IN", # There is data to read.
1837
gobject.IO_OUT: "OUT", # Data can be written (without
1838
# blocking).
1839
gobject.IO_PRI: "PRI", # There is urgent data to read.
1840
gobject.IO_ERR: "ERR", # Error condition.
1841
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1842
# broken, usually for pipes and
1843
# sockets).
1844
}
1845
conditions_string = ' | '.join(name
1846
for cond, name in
1847
condition_names.iteritems()
1848
if cond & condition)
2525
def handle_ipc(self, source, condition,
2526
parent_pipe=None,
2527
proc = None,
2528
client_object=None):
1849
2529
# error, or the other end of multiprocessing.Pipe has closed
1850
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2530
if condition & (GLib.IO_ERR | GLib.IO_HUP):
1851
2531
# Wait for other process to exit
1852
2532
proc.join()
1853
2533
return False
1860
2540
fpr = request[1]
1861
2541
address = request[2]
1862
2542
1863
for c in self.clients.itervalues():
2543
for c in self.clients.values():
1864
2544
if c.fingerprint == fpr:
1865
2545
client = c
1866
2546
break
1874
2554
parent_pipe.send(False)
1875
2555
return False
1876
2556
1877
gobject.io_add_watch(parent_pipe.fileno(),
1878
gobject.IO_IN | gobject.IO_HUP,
1879
functools.partial(self.handle_ipc,
1880
parent_pipe =
1881
parent_pipe,
1882
proc = proc,
1883
client_object =
1884
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))
1885
2564
parent_pipe.send(True)
1886
2565
# remove the old hook in favor of the new above hook on
1887
2566
# same fileno
1893
2572
1894
2573
parent_pipe.send(('data', getattr(client_object,
1895
2574
funcname)(*args,
1896
**kwargs)))
2575
**kwargs)))
1897
2576
1898
2577
if command == 'getattr':
1899
2578
attrname = request[1]
1900
if callable(client_object.__getattribute__(attrname)):
1901
parent_pipe.send(('function',))
2579
if isinstance(client_object.__getattribute__(attrname),
2580
collections.Callable):
2581
parent_pipe.send(('function', ))
1902
2582
else:
1903
parent_pipe.send(('data', client_object
1904
.__getattribute__(attrname)))
2583
parent_pipe.send((
2584
'data', client_object.__getattribute__(attrname)))
1905
2585
1906
2586
if command == 'setattr':
1907
2587
attrname = request[1]
1911
2591
return True
1912
2592
1913
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
1914
2690
def string_to_delta(interval):
1915
2691
"""Parse a string and return a datetime.timedelta
1916
2692
1927
2703
>>> string_to_delta('5m 30s')
1928
2704
datetime.timedelta(0, 330)
1929
2705
"""
2706
2707
try:
2708
return rfc3339_duration_to_delta(interval)
2709
except ValueError:
2710
pass
2711
1930
2712
timevalue = datetime.timedelta(0)
1931
2713
for s in interval.split():
1932
2714
try:
1933
suffix = unicode(s[-1])
2715
suffix = s[-1]
1934
2716
value = int(s[:-1])
1935
2717
if suffix == "d":
1936
2718
delta = datetime.timedelta(value)
1943
2725
elif suffix == "w":
1944
2726
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1945
2727
else:
1946
raise ValueError("Unknown suffix %r" % suffix)
1947
except (ValueError, IndexError) as e:
2728
raise ValueError("Unknown suffix {!r}".format(suffix))
2729
except IndexError as e:
1948
2730
raise ValueError(*(e.args))
1949
2731
timevalue += delta
1950
2732
return timevalue
1963
2745
sys.exit()
1964
2746
if not noclose:
1965
2747
# Close all standard open file descriptors
1966
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2748
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1967
2749
if not stat.S_ISCHR(os.fstat(null).st_mode):
1968
2750
raise OSError(errno.ENODEV,
1969
"%s not a character device"
1970
% os.path.devnull)
2751
"{} not a character device"
2752
.format(os.devnull))
1971
2753
os.dup2(null, sys.stdin.fileno())
1972
2754
os.dup2(null, sys.stdout.fileno())
1973
2755
os.dup2(null, sys.stderr.fileno())
1982
2764
1983
2765
parser = argparse.ArgumentParser()
1984
2766
parser.add_argument("-v", "--version", action="version",
1985
version = "%%(prog)s %s" % version,
2767
version = "%(prog)s {}".format(version),
1986
2768
help="show version number and exit")
1987
2769
parser.add_argument("-i", "--interface", metavar="IF",
1988
2770
help="Bind to interface IF")
1994
2776
help="Run self-test")
1995
2777
parser.add_argument("--debug", action="store_true",
1996
2778
help="Debug mode; run in foreground and log"
1997
" to terminal")
2779
" to terminal", default=None)
1998
2780
parser.add_argument("--debuglevel", metavar="LEVEL",
1999
2781
help="Debug level for stdout output")
2000
2782
parser.add_argument("--priority", help="GnuTLS"
2007
2789
" files")
2008
2790
parser.add_argument("--no-dbus", action="store_false",
2009
2791
dest="use_dbus", help="Do not provide D-Bus"
2010
" system bus interface")
2792
" system bus interface", default=None)
2011
2793
parser.add_argument("--no-ipv6", action="store_false",
2012
dest="use_ipv6", help="Do not use IPv6")
2794
dest="use_ipv6", help="Do not use IPv6",
2795
default=None)
2013
2796
parser.add_argument("--no-restore", action="store_false",
2014
2797
dest="restore", help="Do not restore stored"
2015
" state")
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")
2016
2802
parser.add_argument("--statedir", metavar="DIR",
2017
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)
2018
2809
2019
2810
options = parser.parse_args()
2020
2811
2021
2812
if options.check:
2022
2813
import doctest
2023
doctest.testmod()
2024
sys.exit()
2814
fail_count, test_count = doctest.testmod()
2815
sys.exit(os.EX_OK if fail_count == 0 else 1)
2025
2816
2026
2817
# Default values for config file for server-global settings
2027
2818
server_defaults = { "interface": "",
2029
2820
"port": "",
2030
2821
"debug": "False",
2031
2822
"priority":
2032
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2823
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2824
":+SIGN-DSA-SHA256",
2033
2825
"servicename": "Mandos",
2034
2826
"use_dbus": "True",
2035
2827
"use_ipv6": "True",
2036
2828
"debuglevel": "",
2037
2829
"restore": "True",
2038
"statedir": "/var/lib/mandos"
2039
}
2830
"socket": "",
2831
"statedir": "/var/lib/mandos",
2832
"foreground": "False",
2833
"zeroconf": "True",
2834
}
2040
2835
2041
2836
# Parse config file for server-global settings
2042
2837
server_config = configparser.SafeConfigParser(server_defaults)
2043
2838
del server_defaults
2044
server_config.read(os.path.join(options.configdir,
2045
"mandos.conf"))
2839
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2046
2840
# Convert the SafeConfigParser object to a dict
2047
2841
server_settings = server_config.defaults()
2048
2842
# Use the appropriate methods on the non-string config options
2049
for option in ("debug", "use_dbus", "use_ipv6"):
2843
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2050
2844
server_settings[option] = server_config.getboolean("DEFAULT",
2051
2845
option)
2052
2846
if server_settings["port"]:
2053
2847
server_settings["port"] = server_config.getint("DEFAULT",
2054
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"])
2055
2858
del server_config
2056
2859
2057
2860
# Override the settings from the config file with command line
2058
2861
# options, if set.
2059
2862
for option in ("interface", "address", "port", "debug",
2060
"priority", "servicename", "configdir",
2061
"use_dbus", "use_ipv6", "debuglevel", "restore",
2062
"statedir"):
2863
"priority", "servicename", "configdir", "use_dbus",
2864
"use_ipv6", "debuglevel", "restore", "statedir",
2865
"socket", "foreground", "zeroconf"):
2063
2866
value = getattr(options, option)
2064
2867
if value is not None:
2065
2868
server_settings[option] = value
2066
2869
del options
2067
2870
# Force all strings to be unicode
2068
2871
for option in server_settings.keys():
2069
if type(server_settings[option]) is str:
2070
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
2071
2882
# Now we have our good server settings in "server_settings"
2072
2883
2073
2884
##################################################################
2074
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
2075
2891
# For convenience
2076
2892
debug = server_settings["debug"]
2077
2893
debuglevel = server_settings["debuglevel"]
2079
2895
use_ipv6 = server_settings["use_ipv6"]
2080
2896
stored_state_path = os.path.join(server_settings["statedir"],
2081
2897
stored_state_file)
2898
foreground = server_settings["foreground"]
2899
zeroconf = server_settings["zeroconf"]
2082
2900
2083
2901
if debug:
2084
2902
initlogger(debug, logging.DEBUG)
2090
2908
initlogger(debug, level)
2091
2909
2092
2910
if server_settings["servicename"] != "Mandos":
2093
syslogger.setFormatter(logging.Formatter
2094
('Mandos (%s) [%%(process)d]:'
2095
' %%(levelname)s: %%(message)s'
2096
% server_settings["servicename"]))
2911
syslogger.setFormatter(
2912
logging.Formatter('Mandos ({}) [%(process)d]:'
2913
' %(levelname)s: %(message)s'.format(
2914
server_settings["servicename"])))
2097
2915
2098
2916
# Parse config file with clients
2099
2917
client_config = configparser.SafeConfigParser(Client
2104
2922
global mandos_dbus_service
2105
2923
mandos_dbus_service = None
2106
2924
2107
tcp_server = MandosServer((server_settings["address"],
2108
server_settings["port"]),
2109
ClientHandler,
2110
interface=(server_settings["interface"]
2111
or None),
2112
use_ipv6=use_ipv6,
2113
gnutls_priority=
2114
server_settings["priority"],
2115
use_dbus=use_dbus)
2116
if not debug:
2117
pidfilename = "/var/run/mandos.pid"
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
2118
2941
try:
2119
pidfile = open(pidfilename, "w")
2120
except IOError:
2121
logger.error("Could not open file %r", pidfilename)
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)
2122
2946
2123
try:
2124
uid = pwd.getpwnam("_mandos").pw_uid
2125
gid = pwd.getpwnam("_mandos").pw_gid
2126
except KeyError:
2947
for name, group in (("_mandos", "_mandos"),
2948
("mandos", "mandos"),
2949
("nobody", "nogroup")):
2127
2950
try:
2128
uid = pwd.getpwnam("mandos").pw_uid
2129
gid = pwd.getpwnam("mandos").pw_gid
2951
uid = pwd.getpwnam(name).pw_uid
2952
gid = pwd.getpwnam(group).pw_gid
2953
break
2130
2954
except KeyError:
2131
try:
2132
uid = pwd.getpwnam("nobody").pw_uid
2133
gid = pwd.getpwnam("nobody").pw_gid
2134
except KeyError:
2135
uid = 65534
2136
gid = 65534
2955
continue
2956
else:
2957
uid = 65534
2958
gid = 65534
2137
2959
try:
2138
2960
os.setgid(gid)
2139
2961
os.setuid(uid)
2962
if debug:
2963
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2964
gid))
2140
2965
except OSError as error:
2141
if error[0] != errno.EPERM:
2142
raise 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
2143
2970
2144
2971
if debug:
2145
2972
# Enable all possible GnuTLS debugging
2146
2973
2147
2974
# "Use a log level over 10 to enable all debugging options."
2148
2975
# - GnuTLS manual
2149
gnutls.library.functions.gnutls_global_set_log_level(11)
2976
gnutls.global_set_log_level(11)
2150
2977
2151
@gnutls.library.types.gnutls_log_func
2978
@gnutls.log_func
2152
2979
def debug_gnutls(level, string):
2153
2980
logger.debug("GnuTLS: %s", string[:-1])
2154
2981
2155
(gnutls.library.functions
2156
.gnutls_global_set_log_function(debug_gnutls))
2982
gnutls.global_set_log_function(debug_gnutls)
2157
2983
2158
2984
# Redirect stdin so all checkers get /dev/null
2159
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2985
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2160
2986
os.dup2(null, sys.stdin.fileno())
2161
2987
if null > 2:
2162
2988
os.close(null)
2163
2989
2164
2990
# Need to fork before connecting to D-Bus
2165
if not debug:
2991
if not foreground:
2166
2992
# Close all input and output, do double fork, etc.
2167
2993
daemon()
2168
2994
2169
gobject.threads_init()
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()
2170
2998
2171
2999
global main_loop
2172
3000
# From the Avahi example code
2173
DBusGMainLoop(set_as_default=True )
2174
main_loop = gobject.MainLoop()
3001
DBusGMainLoop(set_as_default=True)
3002
main_loop = GLib.MainLoop()
2175
3003
bus = dbus.SystemBus()
2176
3004
# End of Avahi example code
2177
3005
if use_dbus:
2178
3006
try:
2179
3007
bus_name = dbus.service.BusName("se.recompile.Mandos",
2180
bus, do_not_queue=True)
2181
old_bus_name = (dbus.service.BusName
2182
("se.bsnet.fukt.Mandos", bus,
2183
do_not_queue=True))
2184
except dbus.exceptions.NameExistsException as e:
2185
logger.error(unicode(e) + ", disabling D-Bus")
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)
2186
3015
use_dbus = False
2187
3016
server_settings["use_dbus"] = False
2188
3017
tcp_server.use_dbus = False
2189
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2190
service = AvahiServiceToSyslog(name =
2191
server_settings["servicename"],
2192
servicetype = "_mandos._tcp",
2193
protocol = protocol, bus = bus)
2194
if server_settings["interface"]:
2195
service.interface = (if_nametoindex
2196
(str(server_settings["interface"])))
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"))
2197
3028
2198
3029
global multiprocessing_manager
2199
3030
multiprocessing_manager = multiprocessing.Manager()
2200
3031
2201
3032
client_class = Client
2202
3033
if use_dbus:
2203
client_class = functools.partial(ClientDBusTransitional,
2204
bus = bus)
3034
client_class = functools.partial(ClientDBus, bus = bus)
2205
3035
2206
3036
client_settings = Client.config_parser(client_config)
2207
3037
old_client_settings = {}
2208
3038
clients_data = {}
2209
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
2210
3048
# Get client data and settings from last running state.
2211
3049
if server_settings["restore"]:
2212
3050
try:
2213
3051
with open(stored_state_path, "rb") as stored_state:
2214
clients_data, old_client_settings = (pickle.load
2215
(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"))
2216
3097
os.remove(stored_state_path)
2217
3098
except IOError as e:
2218
logger.warning("Could not load persistent state: {0}"
2219
.format(e))
2220
if e.errno != errno.ENOENT:
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)
2221
3105
raise
2222
3106
except EOFError as e:
2223
3107
logger.warning("Could not load persistent state: "
2224
"EOFError: {0}".format(e))
3108
"EOFError:",
3109
exc_info=e)
2225
3110
2226
3111
with PGPEngine() as pgp:
2227
for client_name, client in clients_data.iteritems():
3112
for client_name, client in clients_data.items():
3113
# Skip removed clients
3114
if client_name not in client_settings:
3115
continue
3116
2228
3117
# Decide which value to use after restoring saved state.
2229
3118
# We have three different values: Old config file,
2230
3119
# new config file, and saved state.
2235
3124
# For each value in new config, check if it
2236
3125
# differs from the old config value (Except for
2237
3126
# the "secret" attribute)
2238
if (name != "secret" and
2239
value != old_client_settings[client_name]
2240
[name]):
3127
if (name != "secret"
3128
and (value !=
3129
old_client_settings[client_name][name])):
2241
3130
client[name] = value
2242
3131
except KeyError:
2243
3132
pass
2244
3133
2245
3134
# Clients who has passed its expire date can still be
2246
# enabled if its last checker was successful. Clients
3135
# enabled if its last checker was successful. A Client
2247
3136
# whose checker succeeded before we stored its state is
2248
3137
# assumed to have successfully run all checkers during
2249
3138
# downtime.
2251
3140
if datetime.datetime.utcnow() >= client["expires"]:
2252
3141
if not client["last_checked_ok"]:
2253
3142
logger.warning(
2254
"disabling client {0} - Client never "
2255
"performed a successful checker"
2256
.format(client_name))
3143
"disabling client {} - Client never "
3144
"performed a successful checker".format(
3145
client_name))
2257
3146
client["enabled"] = False
2258
3147
elif client["last_checker_status"] != 0:
2259
3148
logger.warning(
2260
"disabling client {0} - Client "
2261
"last checker failed with error code {1}"
2262
.format(client_name,
2263
client["last_checker_status"]))
3149
"disabling client {} - Client last"
3150
" checker failed with error code"
3151
" {}".format(
3152
client_name,
3153
client["last_checker_status"]))
2264
3154
client["enabled"] = False
2265
3155
else:
2266
client["expires"] = (datetime.datetime
2267
.utcnow()
2268
+ client["timeout"])
3156
client["expires"] = (
3157
datetime.datetime.utcnow()
3158
+ client["timeout"])
2269
3159
logger.debug("Last checker succeeded,"
2270
" keeping {0} enabled"
2271
.format(client_name))
3160
" keeping {} enabled".format(
3161
client_name))
2272
3162
try:
2273
client["secret"] = (
2274
pgp.decrypt(client["encrypted_secret"],
2275
client_settings[client_name]
2276
["secret"]))
3163
client["secret"] = pgp.decrypt(
3164
client["encrypted_secret"],
3165
client_settings[client_name]["secret"])
2277
3166
except PGPError:
2278
3167
# If decryption fails, we use secret from new settings
2279
logger.debug("Failed to decrypt {0} old secret"
2280
.format(client_name))
2281
client["secret"] = (
2282
client_settings[client_name]["secret"])
2283
3168
logger.debug("Failed to decrypt {} old secret".format(
3169
client_name))
3170
client["secret"] = (client_settings[client_name]
3171
["secret"])
2284
3172
2285
3173
# Add/remove clients based on new changes made to config
2286
3174
for client_name in (set(old_client_settings)
2289
3177
for client_name in (set(client_settings)
2290
3178
- set(old_client_settings)):
2291
3179
clients_data[client_name] = client_settings[client_name]
2292
3180
2293
3181
# Create all client objects
2294
for client_name, client in clients_data.iteritems():
3182
for client_name, client in clients_data.items():
2295
3183
tcp_server.clients[client_name] = client_class(
2296
name = client_name, settings = client)
3184
name = client_name,
3185
settings = client,
3186
server_settings = server_settings)
2297
3187
2298
3188
if not tcp_server.clients:
2299
3189
logger.warning("No clients defined")
2300
2301
if not debug:
2302
try:
2303
with pidfile:
2304
pid = os.getpid()
2305
pidfile.write(str(pid) + "\n".encode("utf-8"))
2306
del pidfile
2307
except IOError:
2308
logger.error("Could not write to file %r with PID %d",
2309
pidfilename, pid)
2310
except NameError:
2311
# "pidfile" was never created
2312
pass
3190
3191
if not foreground:
3192
if pidfile is not None:
3193
pid = os.getpid()
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)
3200
del pidfile
2313
3201
del pidfilename
2314
signal.signal(signal.SIGINT, signal.SIG_IGN)
2315
3202
2316
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2317
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)
2318
3206
2319
3207
if use_dbus:
2320
class MandosDBusService(dbus.service.Object):
3208
3209
@alternate_dbus_interfaces(
3210
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3211
class MandosDBusService(DBusObjectWithObjectManager):
2321
3212
"""A D-Bus proxy object"""
3213
2322
3214
def __init__(self):
2323
3215
dbus.service.Object.__init__(self, bus, "/")
3216
2324
3217
_interface = "se.recompile.Mandos"
2325
3218
2326
3219
@dbus.service.signal(_interface, signature="o")
2333
3226
"D-Bus signal"
2334
3227
pass
2335
3228
3229
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3230
"true"})
2336
3231
@dbus.service.signal(_interface, signature="os")
2337
3232
def ClientRemoved(self, objpath, name):
2338
3233
"D-Bus signal"
2339
3234
pass
2340
3235
3236
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3237
"true"})
2341
3238
@dbus.service.method(_interface, out_signature="ao")
2342
3239
def GetAllClients(self):
2343
3240
"D-Bus method"
2344
return dbus.Array(c.dbus_object_path
2345
for c in
2346
tcp_server.clients.itervalues())
3241
return dbus.Array(c.dbus_object_path for c in
3242
tcp_server.clients.values())
2347
3243
3244
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3245
"true"})
2348
3246
@dbus.service.method(_interface,
2349
3247
out_signature="a{oa{sv}}")
2350
3248
def GetAllClientsWithProperties(self):
2351
3249
"D-Bus method"
2352
3250
return dbus.Dictionary(
2353
((c.dbus_object_path, c.GetAll(""))
2354
for c in tcp_server.clients.itervalues()),
3251
{ c.dbus_object_path: c.GetAll(
3252
"se.recompile.Mandos.Client")
3253
for c in tcp_server.clients.values() },
2355
3254
signature="oa{sv}")
2356
3255
2357
3256
@dbus.service.method(_interface, in_signature="o")
2358
3257
def RemoveClient(self, object_path):
2359
3258
"D-Bus method"
2360
for c in tcp_server.clients.itervalues():
3259
for c in tcp_server.clients.values():
2361
3260
if c.dbus_object_path == object_path:
2362
3261
del tcp_server.clients[c.name]
2363
3262
c.remove_from_connection()
2364
# Don't signal anything except ClientRemoved
3263
# Don't signal the disabling
2365
3264
c.disable(quiet=True)
2366
# Emit D-Bus signal
2367
self.ClientRemoved(object_path, c.name)
3265
# Emit D-Bus signal for removal
3266
self.client_removed_signal(c)
2368
3267
return
2369
3268
raise KeyError(object_path)
2370
3269
2371
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)
2372
3307
2373
class MandosDBusServiceTransitional(MandosDBusService):
2374
__metaclass__ = AlternateDBusNamesMetaclass
2375
mandos_dbus_service = MandosDBusServiceTransitional()
3308
mandos_dbus_service = MandosDBusService()
2376
3309
2377
3310
def cleanup():
2378
3311
"Cleanup function; run on exit"
2379
service.cleanup()
3312
if zeroconf:
3313
service.cleanup()
2380
3314
2381
3315
multiprocessing.active_children()
3316
wnull.close()
2382
3317
if not (tcp_server.clients or client_settings):
2383
3318
return
2384
3319
2387
3322
# removed/edited, old secret will thus be unrecovable.
2388
3323
clients = {}
2389
3324
with PGPEngine() as pgp:
2390
for client in tcp_server.clients.itervalues():
3325
for client in tcp_server.clients.values():
2391
3326
key = client_settings[client.name]["secret"]
2392
3327
client.encrypted_secret = pgp.encrypt(client.secret,
2393
3328
key)
2395
3330
2396
3331
# A list of attributes that can not be pickled
2397
3332
# + secret.
2398
exclude = set(("bus", "changedstate", "secret",
2399
"checker"))
2400
for name, typ in (inspect.getmembers
2401
(dbus.service.Object)):
3333
exclude = { "bus", "changedstate", "secret",
3334
"checker", "server_settings" }
3335
for name, typ in inspect.getmembers(dbus.service
3336
.Object):
2402
3337
exclude.add(name)
2403
3338
2404
3339
client_dict["encrypted_secret"] = (client
2411
3346
del client_settings[client.name]["secret"]
2412
3347
2413
3348
try:
2414
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2415
prefix="clients-",
2416
dir=os.path.dirname
2417
(stored_state_path))
2418
with os.fdopen(tempfd, "wb") as stored_state:
2419
pickle.dump((clients, client_settings), stored_state)
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
2420
3358
os.rename(tempname, stored_state_path)
2421
3359
except (IOError, OSError) as e:
2422
logger.warning("Could not save persistent state: {0}"
2423
.format(e))
2424
3360
if not debug:
2425
3361
try:
2426
3362
os.remove(tempname)
2427
3363
except NameError:
2428
3364
pass
2429
if e.errno not in set((errno.ENOENT, errno.EACCES,
2430
errno.EEXIST)):
2431
raise e
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
2432
3372
2433
3373
# Delete all clients, and settings from config
2434
3374
while tcp_server.clients:
2435
3375
name, client = tcp_server.clients.popitem()
2436
3376
if use_dbus:
2437
3377
client.remove_from_connection()
2438
# Don't signal anything except ClientRemoved
3378
# Don't signal the disabling
2439
3379
client.disable(quiet=True)
3380
# Emit D-Bus signal for removal
2440
3381
if use_dbus:
2441
# Emit D-Bus signal
2442
mandos_dbus_service.ClientRemoved(client
2443
.dbus_object_path,
2444
client.name)
3382
mandos_dbus_service.client_removed_signal(client)
2445
3383
client_settings.clear()
2446
3384
2447
3385
atexit.register(cleanup)
2448
3386
2449
for client in tcp_server.clients.itervalues():
3387
for client in tcp_server.clients.values():
2450
3388
if use_dbus:
2451
# Emit D-Bus signal
2452
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3389
# Emit D-Bus signal for adding
3390
mandos_dbus_service.client_added_signal(client)
2453
3391
# Need to initiate checking of clients
2454
3392
if client.enabled:
2455
3393
client.init_checker()
2458
3396
tcp_server.server_activate()
2459
3397
2460
3398
# Find out what port we got
2461
service.port = tcp_server.socket.getsockname()[1]
3399
if zeroconf:
3400
service.port = tcp_server.socket.getsockname()[1]
2462
3401
if use_ipv6:
2463
3402
logger.info("Now listening on address %r, port %d,"
2464
" flowinfo %d, scope_id %d"
2465
% tcp_server.socket.getsockname())
3403
" flowinfo %d, scope_id %d",
3404
*tcp_server.socket.getsockname())
2466
3405
else: # IPv4
2467
logger.info("Now listening on address %r, port %d"
2468
% tcp_server.socket.getsockname())
3406
logger.info("Now listening on address %r, port %d",
3407
*tcp_server.socket.getsockname())
2469
3408
2470
3409
#service.interface = tcp_server.socket.getsockname()[3]
2471
3410
2472
3411
try:
2473
# From the Avahi example code
2474
try:
2475
service.activate()
2476
except dbus.exceptions.DBusException as error:
2477
logger.critical("DBusException: %s", error)
2478
cleanup()
2479
sys.exit(1)
2480
# End of Avahi example code
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
2481
3421
2482
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2483
lambda *args, **kwargs:
2484
(tcp_server.handle_request
2485
(*args[2:], **kwargs) or True))
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))
2486
3426
2487
3427
logger.debug("Starting main loop")
2488
3428
main_loop.run()
2489
3429
except AvahiError as error:
2490
logger.critical("AvahiError: %s", error)
3430
logger.critical("Avahi Error", exc_info=error)
2491
3431
cleanup()
2492
3432
sys.exit(1)
2493
3433
except KeyboardInterrupt:
2498
3438
# Must run before the D-Bus bus name gets deregistered
2499
3439
cleanup()
2500
3440
3441
2501
3442
if __name__ == '__main__':
2502
3443
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0