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- Committer: Teddy Hogeborn
- Date: 2016-06-28 18:52:00 UTC
- Revision ID: teddy@recompile.se-20160628185200-vv6fikpt18r977x3
mandos-ctl: Include "Expires" and "LastCheckerStatus" properties
* mandos-ctl (tablewords): Add "Expires" and "LastCheckerStatus".
(main/keywords): - '' -
* mandos-ctl (tablewords): Add "Expires" and "LastCheckerStatus".
(main/keywords): - '' -
- files added:
- bugs.xml
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
14
# Copyright © 2008-2016 Teddy Hogeborn
15
# Copyright © 2008-2016 Björn Påhlsson
16
16
#
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
31
# Contact the authors at <mandos@recompile.se>.
32
32
#
33
33
34
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
73
import types
74
import binascii
75
import tempfile
76
import itertools
77
import collections
78
import codecs
65
79
66
80
import dbus
67
81
import dbus.service
68
import gobject
69
import avahi
82
from gi.repository import GLib
70
83
from dbus.mainloop.glib import DBusGMainLoop
71
84
import ctypes
72
85
import ctypes.util
73
86
import xml.dom.minidom
74
87
import inspect
75
88
89
# Try to find the value of SO_BINDTODEVICE:
76
90
try:
91
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
92
# newer, and it is also the most natural place for it:
77
93
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
78
94
except AttributeError:
79
95
try:
96
# This is where SO_BINDTODEVICE was up to and including Python
97
# 2.6, and also 3.2:
80
98
from IN import SO_BINDTODEVICE
81
99
except ImportError:
82
SO_BINDTODEVICE = None
83
84
85
version = "1.3.0"
86
87
#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
89
syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
95
logger.addHandler(syslogger)
96
97
console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
100
# In Python 2.7 it seems to have been removed entirely.
101
# Try running the C preprocessor:
102
try:
103
cc = subprocess.Popen(["cc", "--language=c", "-E",
104
"/dev/stdin"],
105
stdin=subprocess.PIPE,
106
stdout=subprocess.PIPE)
107
stdout = cc.communicate(
108
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
109
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
110
except (OSError, ValueError, IndexError):
111
# No value found
112
SO_BINDTODEVICE = None
113
114
if sys.version_info.major == 2:
115
str = unicode
116
117
version = "1.7.10"
118
stored_state_file = "clients.pickle"
119
120
logger = logging.getLogger()
121
syslogger = None
122
123
try:
124
if_nametoindex = ctypes.cdll.LoadLibrary(
125
ctypes.util.find_library("c")).if_nametoindex
126
except (OSError, AttributeError):
127
128
def if_nametoindex(interface):
129
"Get an interface index the hard way, i.e. using fcntl()"
130
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
131
with contextlib.closing(socket.socket()) as s:
132
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
133
struct.pack(b"16s16x", interface))
134
interface_index = struct.unpack("I", ifreq[16:20])[0]
135
return interface_index
136
137
138
def copy_function(func):
139
"""Make a copy of a function"""
140
if sys.version_info.major == 2:
141
return types.FunctionType(func.func_code,
142
func.func_globals,
143
func.func_name,
144
func.func_defaults,
145
func.func_closure)
146
else:
147
return types.FunctionType(func.__code__,
148
func.__globals__,
149
func.__name__,
150
func.__defaults__,
151
func.__closure__)
152
153
154
def initlogger(debug, level=logging.WARNING):
155
"""init logger and add loglevel"""
156
157
global syslogger
158
syslogger = (logging.handlers.SysLogHandler(
159
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
160
address = "/dev/log"))
161
syslogger.setFormatter(logging.Formatter
162
('Mandos [%(process)d]: %(levelname)s:'
163
' %(message)s'))
164
logger.addHandler(syslogger)
165
166
if debug:
167
console = logging.StreamHandler()
168
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
169
' [%(process)d]:'
170
' %(levelname)s:'
171
' %(message)s'))
172
logger.addHandler(console)
173
logger.setLevel(level)
174
175
176
class PGPError(Exception):
177
"""Exception if encryption/decryption fails"""
178
pass
179
180
181
class PGPEngine(object):
182
"""A simple class for OpenPGP symmetric encryption & decryption"""
183
184
def __init__(self):
185
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
186
self.gpg = "gpg"
187
try:
188
output = subprocess.check_output(["gpgconf"])
189
for line in output.splitlines():
190
name, text, path = line.split(b":")
191
if name == "gpg":
192
self.gpg = path
193
break
194
except OSError as e:
195
if e.errno != errno.ENOENT:
196
raise
197
self.gnupgargs = ['--batch',
198
'--homedir', self.tempdir,
199
'--force-mdc',
200
'--quiet']
201
# Only GPG version 1 has the --no-use-agent option.
202
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
203
self.gnupgargs.append("--no-use-agent")
204
205
def __enter__(self):
206
return self
207
208
def __exit__(self, exc_type, exc_value, traceback):
209
self._cleanup()
210
return False
211
212
def __del__(self):
213
self._cleanup()
214
215
def _cleanup(self):
216
if self.tempdir is not None:
217
# Delete contents of tempdir
218
for root, dirs, files in os.walk(self.tempdir,
219
topdown = False):
220
for filename in files:
221
os.remove(os.path.join(root, filename))
222
for dirname in dirs:
223
os.rmdir(os.path.join(root, dirname))
224
# Remove tempdir
225
os.rmdir(self.tempdir)
226
self.tempdir = None
227
228
def password_encode(self, password):
229
# Passphrase can not be empty and can not contain newlines or
230
# NUL bytes. So we prefix it and hex encode it.
231
encoded = b"mandos" + binascii.hexlify(password)
232
if len(encoded) > 2048:
233
# GnuPG can't handle long passwords, so encode differently
234
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
235
.replace(b"\n", b"\\n")
236
.replace(b"\0", b"\\x00"))
237
return encoded
238
239
def encrypt(self, data, password):
240
passphrase = self.password_encode(password)
241
with tempfile.NamedTemporaryFile(
242
dir=self.tempdir) as passfile:
243
passfile.write(passphrase)
244
passfile.flush()
245
proc = subprocess.Popen([self.gpg, '--symmetric',
246
'--passphrase-file',
247
passfile.name]
248
+ self.gnupgargs,
249
stdin = subprocess.PIPE,
250
stdout = subprocess.PIPE,
251
stderr = subprocess.PIPE)
252
ciphertext, err = proc.communicate(input = data)
253
if proc.returncode != 0:
254
raise PGPError(err)
255
return ciphertext
256
257
def decrypt(self, data, password):
258
passphrase = self.password_encode(password)
259
with tempfile.NamedTemporaryFile(
260
dir = self.tempdir) as passfile:
261
passfile.write(passphrase)
262
passfile.flush()
263
proc = subprocess.Popen([self.gpg, '--decrypt',
264
'--passphrase-file',
265
passfile.name]
266
+ self.gnupgargs,
267
stdin = subprocess.PIPE,
268
stdout = subprocess.PIPE,
269
stderr = subprocess.PIPE)
270
decrypted_plaintext, err = proc.communicate(input = data)
271
if proc.returncode != 0:
272
raise PGPError(err)
273
return decrypted_plaintext
274
275
# Pretend that we have an Avahi module
276
class Avahi(object):
277
"""This isn't so much a class as it is a module-like namespace.
278
It is instantiated once, and simulates having an Avahi module."""
279
IF_UNSPEC = -1 # avahi-common/address.h
280
PROTO_UNSPEC = -1 # avahi-common/address.h
281
PROTO_INET = 0 # avahi-common/address.h
282
PROTO_INET6 = 1 # avahi-common/address.h
283
DBUS_NAME = "org.freedesktop.Avahi"
284
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
285
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
286
DBUS_PATH_SERVER = "/"
287
def string_array_to_txt_array(self, t):
288
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
289
for s in t), signature="ay")
290
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
291
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
292
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
293
SERVER_INVALID = 0 # avahi-common/defs.h
294
SERVER_REGISTERING = 1 # avahi-common/defs.h
295
SERVER_RUNNING = 2 # avahi-common/defs.h
296
SERVER_COLLISION = 3 # avahi-common/defs.h
297
SERVER_FAILURE = 4 # avahi-common/defs.h
298
avahi = Avahi()
102
299
103
300
class AvahiError(Exception):
104
301
def __init__(self, value, *args, **kwargs):
105
302
self.value = value
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
303
return super(AvahiError, self).__init__(value, *args,
304
**kwargs)
305
109
306
110
307
class AvahiServiceError(AvahiError):
111
308
pass
112
309
310
113
311
class AvahiGroupError(AvahiError):
114
312
pass
115
313
122
320
Used to optionally bind to the specified interface.
123
321
name: string; Example: 'Mandos'
124
322
type: string; Example: '_mandos._tcp'.
125
See <http://www.dns-sd.org/ServiceTypes.html>
323
See <https://www.iana.org/assignments/service-names-port-numbers>
126
324
port: integer; what port to announce
127
325
TXT: list of strings; TXT record for the service
128
326
domain: string; Domain to publish on, default to .local if empty.
134
332
server: D-Bus Server
135
333
bus: dbus.SystemBus()
136
334
"""
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
138
servicetype = None, port = None, TXT = None,
139
domain = "", host = "", max_renames = 32768,
140
protocol = avahi.PROTO_UNSPEC, bus = None):
335
336
def __init__(self,
337
interface = avahi.IF_UNSPEC,
338
name = None,
339
servicetype = None,
340
port = None,
341
TXT = None,
342
domain = "",
343
host = "",
344
max_renames = 32768,
345
protocol = avahi.PROTO_UNSPEC,
346
bus = None):
141
347
self.interface = interface
142
348
self.name = name
143
349
self.type = servicetype
152
358
self.server = None
153
359
self.bus = bus
154
360
self.entry_group_state_changed_match = None
155
def rename(self):
361
362
def rename(self, remove=True):
156
363
"""Derived from the Avahi example code"""
157
364
if self.rename_count >= self.max_renames:
158
365
logger.critical("No suitable Zeroconf service name found"
159
366
" after %i retries, exiting.",
160
367
self.rename_count)
161
368
raise AvahiServiceError("Too many renames")
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
369
self.name = str(
370
self.server.GetAlternativeServiceName(self.name))
371
self.rename_count += 1
163
372
logger.info("Changing Zeroconf service name to %r ...",
164
373
self.name)
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
167
' %%(levelname)s: %%(message)s'
168
% self.name))
169
self.remove()
374
if remove:
375
self.remove()
170
376
try:
171
377
self.add()
172
378
except dbus.exceptions.DBusException as error:
173
logger.critical("DBusException: %s", error)
174
self.cleanup()
175
os._exit(1)
176
self.rename_count += 1
379
if (error.get_dbus_name()
380
== "org.freedesktop.Avahi.CollisionError"):
381
logger.info("Local Zeroconf service name collision.")
382
return self.rename(remove=False)
383
else:
384
logger.critical("D-Bus Exception", exc_info=error)
385
self.cleanup()
386
os._exit(1)
387
177
388
def remove(self):
178
389
"""Derived from the Avahi example code"""
179
if self.group is not None:
180
try:
181
self.group.Free()
182
except (dbus.exceptions.UnknownMethodException,
183
dbus.exceptions.DBusException) as e:
184
pass
185
self.group = None
186
390
if self.entry_group_state_changed_match is not None:
187
391
self.entry_group_state_changed_match.remove()
188
392
self.entry_group_state_changed_match = None
393
if self.group is not None:
394
self.group.Reset()
395
189
396
def add(self):
190
397
"""Derived from the Avahi example code"""
191
398
self.remove()
192
self.group = dbus.Interface(
193
self.bus.get_object(avahi.DBUS_NAME,
194
self.server.EntryGroupNew(),
195
follow_name_owner_changes=True),
196
avahi.DBUS_INTERFACE_ENTRY_GROUP)
399
if self.group is None:
400
self.group = dbus.Interface(
401
self.bus.get_object(avahi.DBUS_NAME,
402
self.server.EntryGroupNew()),
403
avahi.DBUS_INTERFACE_ENTRY_GROUP)
197
404
self.entry_group_state_changed_match = (
198
405
self.group.connect_to_signal(
199
'StateChanged', self .entry_group_state_changed))
406
'StateChanged', self.entry_group_state_changed))
200
407
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
201
408
self.name, self.type)
202
409
self.group.AddService(
208
415
dbus.UInt16(self.port),
209
416
avahi.string_array_to_txt_array(self.TXT))
210
417
self.group.Commit()
418
211
419
def entry_group_state_changed(self, state, error):
212
420
"""Derived from the Avahi example code"""
213
421
logger.debug("Avahi entry group state change: %i", state)
219
427
self.rename()
220
428
elif state == avahi.ENTRY_GROUP_FAILURE:
221
429
logger.critical("Avahi: Error in group state changed %s",
222
unicode(error))
223
raise AvahiGroupError("State changed: %s"
224
% unicode(error))
430
str(error))
431
raise AvahiGroupError("State changed: {!s}".format(error))
432
225
433
def cleanup(self):
226
434
"""Derived from the Avahi example code"""
435
if self.group is not None:
436
try:
437
self.group.Free()
438
except (dbus.exceptions.UnknownMethodException,
439
dbus.exceptions.DBusException):
440
pass
441
self.group = None
227
442
self.remove()
443
228
444
def server_state_changed(self, state, error=None):
229
445
"""Derived from the Avahi example code"""
230
446
logger.debug("Avahi server state change: %i", state)
231
bad_states = { avahi.SERVER_INVALID:
232
"Zeroconf server invalid",
233
avahi.SERVER_REGISTERING: None,
234
avahi.SERVER_COLLISION:
235
"Zeroconf server name collision",
236
avahi.SERVER_FAILURE:
237
"Zeroconf server failure" }
447
bad_states = {
448
avahi.SERVER_INVALID: "Zeroconf server invalid",
449
avahi.SERVER_REGISTERING: None,
450
avahi.SERVER_COLLISION: "Zeroconf server name collision",
451
avahi.SERVER_FAILURE: "Zeroconf server failure",
452
}
238
453
if state in bad_states:
239
if bad_states[state]:
240
logger.error(bad_states[state])
241
self.remove()
454
if bad_states[state] is not None:
455
if error is None:
456
logger.error(bad_states[state])
457
else:
458
logger.error(bad_states[state] + ": %r", error)
459
self.cleanup()
242
460
elif state == avahi.SERVER_RUNNING:
243
self.add()
461
try:
462
self.add()
463
except dbus.exceptions.DBusException as error:
464
if (error.get_dbus_name()
465
== "org.freedesktop.Avahi.CollisionError"):
466
logger.info("Local Zeroconf service name"
467
" collision.")
468
return self.rename(remove=False)
469
else:
470
logger.critical("D-Bus Exception", exc_info=error)
471
self.cleanup()
472
os._exit(1)
244
473
else:
245
logger.debug("Unknown state: %r", state)
474
if error is None:
475
logger.debug("Unknown state: %r", state)
476
else:
477
logger.debug("Unknown state: %r: %r", state, error)
478
246
479
def activate(self):
247
480
"""Derived from the Avahi example code"""
248
481
if self.server is None:
252
485
follow_name_owner_changes=True),
253
486
avahi.DBUS_INTERFACE_SERVER)
254
487
self.server.connect_to_signal("StateChanged",
255
self.server_state_changed)
488
self.server_state_changed)
256
489
self.server_state_changed(self.server.GetState())
257
490
258
491
492
class AvahiServiceToSyslog(AvahiService):
493
def rename(self, *args, **kwargs):
494
"""Add the new name to the syslog messages"""
495
ret = AvahiService.rename(self, *args, **kwargs)
496
syslogger.setFormatter(logging.Formatter(
497
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
498
.format(self.name)))
499
return ret
500
501
# Pretend that we have a GnuTLS module
502
class GnuTLS(object):
503
"""This isn't so much a class as it is a module-like namespace.
504
It is instantiated once, and simulates having a GnuTLS module."""
505
506
_library = ctypes.cdll.LoadLibrary(
507
ctypes.util.find_library("gnutls"))
508
_need_version = b"3.3.0"
509
def __init__(self):
510
# Need to use class name "GnuTLS" here, since this method is
511
# called before the assignment to the "gnutls" global variable
512
# happens.
513
if GnuTLS.check_version(self._need_version) is None:
514
raise GnuTLS.Error("Needs GnuTLS {} or later"
515
.format(self._need_version))
516
517
# Unless otherwise indicated, the constants and types below are
518
# all from the gnutls/gnutls.h C header file.
519
520
# Constants
521
E_SUCCESS = 0
522
E_INTERRUPTED = -52
523
E_AGAIN = -28
524
CRT_OPENPGP = 2
525
CLIENT = 2
526
SHUT_RDWR = 0
527
CRD_CERTIFICATE = 1
528
E_NO_CERTIFICATE_FOUND = -49
529
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
530
531
# Types
532
class session_int(ctypes.Structure):
533
_fields_ = []
534
session_t = ctypes.POINTER(session_int)
535
class certificate_credentials_st(ctypes.Structure):
536
_fields_ = []
537
certificate_credentials_t = ctypes.POINTER(
538
certificate_credentials_st)
539
certificate_type_t = ctypes.c_int
540
class datum_t(ctypes.Structure):
541
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
542
('size', ctypes.c_uint)]
543
class openpgp_crt_int(ctypes.Structure):
544
_fields_ = []
545
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
546
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
547
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
548
credentials_type_t = ctypes.c_int
549
transport_ptr_t = ctypes.c_void_p
550
close_request_t = ctypes.c_int
551
552
# Exceptions
553
class Error(Exception):
554
# We need to use the class name "GnuTLS" here, since this
555
# exception might be raised from within GnuTLS.__init__,
556
# which is called before the assignment to the "gnutls"
557
# global variable has happened.
558
def __init__(self, message = None, code = None, args=()):
559
# Default usage is by a message string, but if a return
560
# code is passed, convert it to a string with
561
# gnutls.strerror()
562
self.code = code
563
if message is None and code is not None:
564
message = GnuTLS.strerror(code)
565
return super(GnuTLS.Error, self).__init__(
566
message, *args)
567
568
class CertificateSecurityError(Error):
569
pass
570
571
# Classes
572
class Credentials(object):
573
def __init__(self):
574
self._c_object = gnutls.certificate_credentials_t()
575
gnutls.certificate_allocate_credentials(
576
ctypes.byref(self._c_object))
577
self.type = gnutls.CRD_CERTIFICATE
578
579
def __del__(self):
580
gnutls.certificate_free_credentials(self._c_object)
581
582
class ClientSession(object):
583
def __init__(self, socket, credentials = None):
584
self._c_object = gnutls.session_t()
585
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
586
gnutls.set_default_priority(self._c_object)
587
gnutls.transport_set_ptr(self._c_object, socket.fileno())
588
gnutls.handshake_set_private_extensions(self._c_object,
589
True)
590
self.socket = socket
591
if credentials is None:
592
credentials = gnutls.Credentials()
593
gnutls.credentials_set(self._c_object, credentials.type,
594
ctypes.cast(credentials._c_object,
595
ctypes.c_void_p))
596
self.credentials = credentials
597
598
def __del__(self):
599
gnutls.deinit(self._c_object)
600
601
def handshake(self):
602
return gnutls.handshake(self._c_object)
603
604
def send(self, data):
605
data = bytes(data)
606
data_len = len(data)
607
while data_len > 0:
608
data_len -= gnutls.record_send(self._c_object,
609
data[-data_len:],
610
data_len)
611
612
def bye(self):
613
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
614
615
# Error handling functions
616
def _error_code(result):
617
"""A function to raise exceptions on errors, suitable
618
for the 'restype' attribute on ctypes functions"""
619
if result >= 0:
620
return result
621
if result == gnutls.E_NO_CERTIFICATE_FOUND:
622
raise gnutls.CertificateSecurityError(code = result)
623
raise gnutls.Error(code = result)
624
625
def _retry_on_error(result, func, arguments):
626
"""A function to retry on some errors, suitable
627
for the 'errcheck' attribute on ctypes functions"""
628
while result < 0:
629
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
630
return _error_code(result)
631
result = func(*arguments)
632
return result
633
634
# Unless otherwise indicated, the function declarations below are
635
# all from the gnutls/gnutls.h C header file.
636
637
# Functions
638
priority_set_direct = _library.gnutls_priority_set_direct
639
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
640
ctypes.POINTER(ctypes.c_char_p)]
641
priority_set_direct.restype = _error_code
642
643
init = _library.gnutls_init
644
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
645
init.restype = _error_code
646
647
set_default_priority = _library.gnutls_set_default_priority
648
set_default_priority.argtypes = [session_t]
649
set_default_priority.restype = _error_code
650
651
record_send = _library.gnutls_record_send
652
record_send.argtypes = [session_t, ctypes.c_void_p,
653
ctypes.c_size_t]
654
record_send.restype = ctypes.c_ssize_t
655
record_send.errcheck = _retry_on_error
656
657
certificate_allocate_credentials = (
658
_library.gnutls_certificate_allocate_credentials)
659
certificate_allocate_credentials.argtypes = [
660
ctypes.POINTER(certificate_credentials_t)]
661
certificate_allocate_credentials.restype = _error_code
662
663
certificate_free_credentials = (
664
_library.gnutls_certificate_free_credentials)
665
certificate_free_credentials.argtypes = [certificate_credentials_t]
666
certificate_free_credentials.restype = None
667
668
handshake_set_private_extensions = (
669
_library.gnutls_handshake_set_private_extensions)
670
handshake_set_private_extensions.argtypes = [session_t,
671
ctypes.c_int]
672
handshake_set_private_extensions.restype = None
673
674
credentials_set = _library.gnutls_credentials_set
675
credentials_set.argtypes = [session_t, credentials_type_t,
676
ctypes.c_void_p]
677
credentials_set.restype = _error_code
678
679
strerror = _library.gnutls_strerror
680
strerror.argtypes = [ctypes.c_int]
681
strerror.restype = ctypes.c_char_p
682
683
certificate_type_get = _library.gnutls_certificate_type_get
684
certificate_type_get.argtypes = [session_t]
685
certificate_type_get.restype = _error_code
686
687
certificate_get_peers = _library.gnutls_certificate_get_peers
688
certificate_get_peers.argtypes = [session_t,
689
ctypes.POINTER(ctypes.c_uint)]
690
certificate_get_peers.restype = ctypes.POINTER(datum_t)
691
692
global_set_log_level = _library.gnutls_global_set_log_level
693
global_set_log_level.argtypes = [ctypes.c_int]
694
global_set_log_level.restype = None
695
696
global_set_log_function = _library.gnutls_global_set_log_function
697
global_set_log_function.argtypes = [log_func]
698
global_set_log_function.restype = None
699
700
deinit = _library.gnutls_deinit
701
deinit.argtypes = [session_t]
702
deinit.restype = None
703
704
handshake = _library.gnutls_handshake
705
handshake.argtypes = [session_t]
706
handshake.restype = _error_code
707
handshake.errcheck = _retry_on_error
708
709
transport_set_ptr = _library.gnutls_transport_set_ptr
710
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
711
transport_set_ptr.restype = None
712
713
bye = _library.gnutls_bye
714
bye.argtypes = [session_t, close_request_t]
715
bye.restype = _error_code
716
bye.errcheck = _retry_on_error
717
718
check_version = _library.gnutls_check_version
719
check_version.argtypes = [ctypes.c_char_p]
720
check_version.restype = ctypes.c_char_p
721
722
# All the function declarations below are from gnutls/openpgp.h
723
724
openpgp_crt_init = _library.gnutls_openpgp_crt_init
725
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
726
openpgp_crt_init.restype = _error_code
727
728
openpgp_crt_import = _library.gnutls_openpgp_crt_import
729
openpgp_crt_import.argtypes = [openpgp_crt_t,
730
ctypes.POINTER(datum_t),
731
openpgp_crt_fmt_t]
732
openpgp_crt_import.restype = _error_code
733
734
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
735
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
736
ctypes.POINTER(ctypes.c_uint)]
737
openpgp_crt_verify_self.restype = _error_code
738
739
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
740
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
741
openpgp_crt_deinit.restype = None
742
743
openpgp_crt_get_fingerprint = (
744
_library.gnutls_openpgp_crt_get_fingerprint)
745
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
746
ctypes.c_void_p,
747
ctypes.POINTER(
748
ctypes.c_size_t)]
749
openpgp_crt_get_fingerprint.restype = _error_code
750
751
# Remove non-public functions
752
del _error_code, _retry_on_error
753
# Create the global "gnutls" object, simulating a module
754
gnutls = GnuTLS()
755
756
def call_pipe(connection, # : multiprocessing.Connection
757
func, *args, **kwargs):
758
"""This function is meant to be called by multiprocessing.Process
759
760
This function runs func(*args, **kwargs), and writes the resulting
761
return value on the provided multiprocessing.Connection.
762
"""
763
connection.send(func(*args, **kwargs))
764
connection.close()
765
259
766
class Client(object):
260
767
"""A representation of a client host served by this server.
261
768
262
769
Attributes:
263
_approved: bool(); 'None' if not yet approved/disapproved
770
approved: bool(); 'None' if not yet approved/disapproved
264
771
approval_delay: datetime.timedelta(); Time to wait for approval
265
772
approval_duration: datetime.timedelta(); Duration of one approval
266
773
checker: subprocess.Popen(); a running checker process used
267
774
to see if the client lives.
268
775
'None' if no process is running.
269
checker_callback_tag: a gobject event source tag, or None
776
checker_callback_tag: a GLib event source tag, or None
270
777
checker_command: string; External command which is run to check
271
778
if client lives. %() expansions are done at
272
779
runtime with vars(self) as dict, so that for
273
780
instance %(name)s can be used in the command.
274
checker_initiator_tag: a gobject event source tag, or None
781
checker_initiator_tag: a GLib event source tag, or None
275
782
created: datetime.datetime(); (UTC) object creation
783
client_structure: Object describing what attributes a client has
784
and is used for storing the client at exit
276
785
current_checker_command: string; current running checker_command
277
disable_hook: If set, called by disable() as disable_hook(self)
278
disable_initiator_tag: a gobject event source tag, or None
786
disable_initiator_tag: a GLib event source tag, or None
279
787
enabled: bool()
280
788
fingerprint: string (40 or 32 hexadecimal digits); used to
281
789
uniquely identify the client
283
791
interval: datetime.timedelta(); How often to start a new checker
284
792
last_approval_request: datetime.datetime(); (UTC) or None
285
793
last_checked_ok: datetime.datetime(); (UTC) or None
286
last_enabled: datetime.datetime(); (UTC)
794
last_checker_status: integer between 0 and 255 reflecting exit
795
status of last checker. -1 reflects crashed
796
checker, -2 means no checker completed yet.
797
last_checker_signal: The signal which killed the last checker, if
798
last_checker_status is -1
799
last_enabled: datetime.datetime(); (UTC) or None
287
800
name: string; from the config file, used in log messages and
288
801
D-Bus identifiers
289
802
secret: bytestring; sent verbatim (over TLS) to client
290
803
timeout: datetime.timedelta(); How long from last_checked_ok
291
804
until this client is disabled
805
extended_timeout: extra long timeout when secret has been sent
292
806
runtime_expansions: Allowed attributes for runtime expansion.
807
expires: datetime.datetime(); time (UTC) when a client will be
808
disabled, or None
809
server_settings: The server_settings dict from main()
293
810
"""
294
811
295
812
runtime_expansions = ("approval_delay", "approval_duration",
296
"created", "enabled", "fingerprint",
297
"host", "interval", "last_checked_ok",
813
"created", "enabled", "expires",
814
"fingerprint", "host", "interval",
815
"last_approval_request", "last_checked_ok",
298
816
"last_enabled", "name", "timeout")
817
client_defaults = {
818
"timeout": "PT5M",
819
"extended_timeout": "PT15M",
820
"interval": "PT2M",
821
"checker": "fping -q -- %%(host)s",
822
"host": "",
823
"approval_delay": "PT0S",
824
"approval_duration": "PT1S",
825
"approved_by_default": "True",
826
"enabled": "True",
827
}
299
828
300
829
@staticmethod
301
def _timedelta_to_milliseconds(td):
302
"Convert a datetime.timedelta() to milliseconds"
303
return ((td.days * 24 * 60 * 60 * 1000)
304
+ (td.seconds * 1000)
305
+ (td.microseconds // 1000))
306
307
def timeout_milliseconds(self):
308
"Return the 'timeout' attribute in milliseconds"
309
return self._timedelta_to_milliseconds(self.timeout)
310
311
def interval_milliseconds(self):
312
"Return the 'interval' attribute in milliseconds"
313
return self._timedelta_to_milliseconds(self.interval)
314
315
def approval_delay_milliseconds(self):
316
return self._timedelta_to_milliseconds(self.approval_delay)
317
318
def __init__(self, name = None, disable_hook=None, config=None):
319
"""Note: the 'checker' key in 'config' sets the
320
'checker_command' attribute and *not* the 'checker'
321
attribute."""
830
def config_parser(config):
831
"""Construct a new dict of client settings of this form:
832
{ client_name: {setting_name: value, ...}, ...}
833
with exceptions for any special settings as defined above.
834
NOTE: Must be a pure function. Must return the same result
835
value given the same arguments.
836
"""
837
settings = {}
838
for client_name in config.sections():
839
section = dict(config.items(client_name))
840
client = settings[client_name] = {}
841
842
client["host"] = section["host"]
843
# Reformat values from string types to Python types
844
client["approved_by_default"] = config.getboolean(
845
client_name, "approved_by_default")
846
client["enabled"] = config.getboolean(client_name,
847
"enabled")
848
849
# Uppercase and remove spaces from fingerprint for later
850
# comparison purposes with return value from the
851
# fingerprint() function
852
client["fingerprint"] = (section["fingerprint"].upper()
853
.replace(" ", ""))
854
if "secret" in section:
855
client["secret"] = codecs.decode(section["secret"]
856
.encode("utf-8"),
857
"base64")
858
elif "secfile" in section:
859
with open(os.path.expanduser(os.path.expandvars
860
(section["secfile"])),
861
"rb") as secfile:
862
client["secret"] = secfile.read()
863
else:
864
raise TypeError("No secret or secfile for section {}"
865
.format(section))
866
client["timeout"] = string_to_delta(section["timeout"])
867
client["extended_timeout"] = string_to_delta(
868
section["extended_timeout"])
869
client["interval"] = string_to_delta(section["interval"])
870
client["approval_delay"] = string_to_delta(
871
section["approval_delay"])
872
client["approval_duration"] = string_to_delta(
873
section["approval_duration"])
874
client["checker_command"] = section["checker"]
875
client["last_approval_request"] = None
876
client["last_checked_ok"] = None
877
client["last_checker_status"] = -2
878
879
return settings
880
881
def __init__(self, settings, name = None, server_settings=None):
322
882
self.name = name
323
if config is None:
324
config = {}
883
if server_settings is None:
884
server_settings = {}
885
self.server_settings = server_settings
886
# adding all client settings
887
for setting, value in settings.items():
888
setattr(self, setting, value)
889
890
if self.enabled:
891
if not hasattr(self, "last_enabled"):
892
self.last_enabled = datetime.datetime.utcnow()
893
if not hasattr(self, "expires"):
894
self.expires = (datetime.datetime.utcnow()
895
+ self.timeout)
896
else:
897
self.last_enabled = None
898
self.expires = None
899
325
900
logger.debug("Creating client %r", self.name)
326
# Uppercase and remove spaces from fingerprint for later
327
# comparison purposes with return value from the fingerprint()
328
# function
329
self.fingerprint = (config["fingerprint"].upper()
330
.replace(" ", ""))
331
901
logger.debug(" Fingerprint: %s", self.fingerprint)
332
if "secret" in config:
333
self.secret = config["secret"].decode("base64")
334
elif "secfile" in config:
335
with open(os.path.expanduser(os.path.expandvars
336
(config["secfile"])),
337
"rb") as secfile:
338
self.secret = secfile.read()
339
else:
340
raise TypeError("No secret or secfile for client %s"
341
% self.name)
342
self.host = config.get("host", "")
343
self.created = datetime.datetime.utcnow()
344
self.enabled = False
345
self.last_approval_request = None
346
self.last_enabled = None
347
self.last_checked_ok = None
348
self.timeout = string_to_delta(config["timeout"])
349
self.interval = string_to_delta(config["interval"])
350
self.disable_hook = disable_hook
902
self.created = settings.get("created",
903
datetime.datetime.utcnow())
904
905
# attributes specific for this server instance
351
906
self.checker = None
352
907
self.checker_initiator_tag = None
353
908
self.disable_initiator_tag = None
354
909
self.checker_callback_tag = None
355
self.checker_command = config["checker"]
356
910
self.current_checker_command = None
357
self.last_connect = None
358
self._approved = None
359
self.approved_by_default = config.get("approved_by_default",
360
True)
911
self.approved = None
361
912
self.approvals_pending = 0
362
self.approval_delay = string_to_delta(
363
config["approval_delay"])
364
self.approval_duration = string_to_delta(
365
config["approval_duration"])
366
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
913
self.changedstate = multiprocessing_manager.Condition(
914
multiprocessing_manager.Lock())
915
self.client_structure = [attr
916
for attr in self.__dict__.keys()
917
if not attr.startswith("_")]
918
self.client_structure.append("client_structure")
919
920
for name, t in inspect.getmembers(
921
type(self), lambda obj: isinstance(obj, property)):
922
if not name.startswith("_"):
923
self.client_structure.append(name)
367
924
925
# Send notice to process children that client state has changed
368
926
def send_changedstate(self):
369
self.changedstate.acquire()
370
self.changedstate.notify_all()
371
self.changedstate.release()
372
927
with self.changedstate:
928
self.changedstate.notify_all()
929
373
930
def enable(self):
374
931
"""Start this client's checker and timeout hooks"""
375
932
if getattr(self, "enabled", False):
376
933
# Already enabled
377
934
return
378
self.send_changedstate()
935
self.expires = datetime.datetime.utcnow() + self.timeout
936
self.enabled = True
379
937
self.last_enabled = datetime.datetime.utcnow()
380
# Schedule a new checker to be started an 'interval' from now,
381
# and every interval from then on.
382
self.checker_initiator_tag = (gobject.timeout_add
383
(self.interval_milliseconds(),
384
self.start_checker))
385
# Schedule a disable() when 'timeout' has passed
386
self.disable_initiator_tag = (gobject.timeout_add
387
(self.timeout_milliseconds(),
388
self.disable))
389
self.enabled = True
390
# Also start a new checker *right now*.
391
self.start_checker()
938
self.init_checker()
939
self.send_changedstate()
392
940
393
941
def disable(self, quiet=True):
394
942
"""Disable this client."""
395
943
if not getattr(self, "enabled", False):
396
944
return False
397
945
if not quiet:
398
self.send_changedstate()
399
if not quiet:
400
946
logger.info("Disabling client %s", self.name)
401
if getattr(self, "disable_initiator_tag", False):
402
gobject.source_remove(self.disable_initiator_tag)
947
if getattr(self, "disable_initiator_tag", None) is not None:
948
GLib.source_remove(self.disable_initiator_tag)
403
949
self.disable_initiator_tag = None
404
if getattr(self, "checker_initiator_tag", False):
405
gobject.source_remove(self.checker_initiator_tag)
950
self.expires = None
951
if getattr(self, "checker_initiator_tag", None) is not None:
952
GLib.source_remove(self.checker_initiator_tag)
406
953
self.checker_initiator_tag = None
407
954
self.stop_checker()
408
if self.disable_hook:
409
self.disable_hook(self)
410
955
self.enabled = False
411
# Do not run this again if called by a gobject.timeout_add
956
if not quiet:
957
self.send_changedstate()
958
# Do not run this again if called by a GLib.timeout_add
412
959
return False
413
960
414
961
def __del__(self):
415
self.disable_hook = None
416
962
self.disable()
417
963
418
def checker_callback(self, pid, condition, command):
964
def init_checker(self):
965
# Schedule a new checker to be started an 'interval' from now,
966
# and every interval from then on.
967
if self.checker_initiator_tag is not None:
968
GLib.source_remove(self.checker_initiator_tag)
969
self.checker_initiator_tag = GLib.timeout_add(
970
int(self.interval.total_seconds() * 1000),
971
self.start_checker)
972
# Schedule a disable() when 'timeout' has passed
973
if self.disable_initiator_tag is not None:
974
GLib.source_remove(self.disable_initiator_tag)
975
self.disable_initiator_tag = GLib.timeout_add(
976
int(self.timeout.total_seconds() * 1000), self.disable)
977
# Also start a new checker *right now*.
978
self.start_checker()
979
980
def checker_callback(self, source, condition, connection,
981
command):
419
982
"""The checker has completed, so take appropriate actions."""
420
983
self.checker_callback_tag = None
421
984
self.checker = None
422
if os.WIFEXITED(condition):
423
exitstatus = os.WEXITSTATUS(condition)
424
if exitstatus == 0:
985
# Read return code from connection (see call_pipe)
986
returncode = connection.recv()
987
connection.close()
988
989
if returncode >= 0:
990
self.last_checker_status = returncode
991
self.last_checker_signal = None
992
if self.last_checker_status == 0:
425
993
logger.info("Checker for %(name)s succeeded",
426
994
vars(self))
427
995
self.checked_ok()
428
996
else:
429
logger.info("Checker for %(name)s failed",
430
vars(self))
997
logger.info("Checker for %(name)s failed", vars(self))
431
998
else:
999
self.last_checker_status = -1
1000
self.last_checker_signal = -returncode
432
1001
logger.warning("Checker for %(name)s crashed?",
433
1002
vars(self))
1003
return False
434
1004
435
1005
def checked_ok(self):
436
"""Bump up the timeout for this client.
437
438
This should only be called when the client has been seen,
439
alive and well.
440
"""
1006
"""Assert that the client has been seen, alive and well."""
441
1007
self.last_checked_ok = datetime.datetime.utcnow()
442
gobject.source_remove(self.disable_initiator_tag)
443
self.disable_initiator_tag = (gobject.timeout_add
444
(self.timeout_milliseconds(),
445
self.disable))
1008
self.last_checker_status = 0
1009
self.last_checker_signal = None
1010
self.bump_timeout()
1011
1012
def bump_timeout(self, timeout=None):
1013
"""Bump up the timeout for this client."""
1014
if timeout is None:
1015
timeout = self.timeout
1016
if self.disable_initiator_tag is not None:
1017
GLib.source_remove(self.disable_initiator_tag)
1018
self.disable_initiator_tag = None
1019
if getattr(self, "enabled", False):
1020
self.disable_initiator_tag = GLib.timeout_add(
1021
int(timeout.total_seconds() * 1000), self.disable)
1022
self.expires = datetime.datetime.utcnow() + timeout
446
1023
447
1024
def need_approval(self):
448
1025
self.last_approval_request = datetime.datetime.utcnow()
453
1030
If a checker already exists, leave it running and do
454
1031
nothing."""
455
1032
# The reason for not killing a running checker is that if we
456
# did that, then if a checker (for some reason) started
457
# running slowly and taking more than 'interval' time, the
458
# client would inevitably timeout, since no checker would get
459
# a chance to run to completion. If we instead leave running
1033
# did that, and if a checker (for some reason) started running
1034
# slowly and taking more than 'interval' time, then the client
1035
# would inevitably timeout, since no checker would get a
1036
# chance to run to completion. If we instead leave running
460
1037
# checkers alone, the checker would have to take more time
461
1038
# than 'timeout' for the client to be disabled, which is as it
462
1039
# should be.
463
1040
464
# If a checker exists, make sure it is not a zombie
465
try:
466
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
467
except (AttributeError, OSError) as error:
468
if (isinstance(error, OSError)
469
and error.errno != errno.ECHILD):
470
raise error
471
else:
472
if pid:
473
logger.warning("Checker was a zombie")
474
gobject.source_remove(self.checker_callback_tag)
475
self.checker_callback(pid, status,
476
self.current_checker_command)
1041
if self.checker is not None and not self.checker.is_alive():
1042
logger.warning("Checker was not alive; joining")
1043
self.checker.join()
1044
self.checker = None
477
1045
# Start a new checker if needed
478
1046
if self.checker is None:
1047
# Escape attributes for the shell
1048
escaped_attrs = {
1049
attr: re.escape(str(getattr(self, attr)))
1050
for attr in self.runtime_expansions }
479
1051
try:
480
# In case checker_command has exactly one % operator
481
command = self.checker_command % self.host
482
except TypeError:
483
# Escape attributes for the shell
484
escaped_attrs = dict(
485
(attr,
486
re.escape(unicode(str(getattr(self, attr, "")),
487
errors=
488
'replace')))
489
for attr in
490
self.runtime_expansions)
491
492
try:
493
command = self.checker_command % escaped_attrs
494
except TypeError as error:
495
logger.error('Could not format string "%s":'
496
' %s', self.checker_command, error)
497
return True # Try again later
1052
command = self.checker_command % escaped_attrs
1053
except TypeError as error:
1054
logger.error('Could not format string "%s"',
1055
self.checker_command,
1056
exc_info=error)
1057
return True # Try again later
498
1058
self.current_checker_command = command
499
try:
500
logger.info("Starting checker %r for %s",
501
command, self.name)
502
# We don't need to redirect stdout and stderr, since
503
# in normal mode, that is already done by daemon(),
504
# and in debug mode we don't want to. (Stdin is
505
# always replaced by /dev/null.)
506
self.checker = subprocess.Popen(command,
507
close_fds=True,
508
shell=True, cwd="/")
509
self.checker_callback_tag = (gobject.child_watch_add
510
(self.checker.pid,
511
self.checker_callback,
512
data=command))
513
# The checker may have completed before the gobject
514
# watch was added. Check for this.
515
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
516
if pid:
517
gobject.source_remove(self.checker_callback_tag)
518
self.checker_callback(pid, status, command)
519
except OSError as error:
520
logger.error("Failed to start subprocess: %s",
521
error)
522
# Re-run this periodically if run by gobject.timeout_add
1059
logger.info("Starting checker %r for %s", command,
1060
self.name)
1061
# We don't need to redirect stdout and stderr, since
1062
# in normal mode, that is already done by daemon(),
1063
# and in debug mode we don't want to. (Stdin is
1064
# always replaced by /dev/null.)
1065
# The exception is when not debugging but nevertheless
1066
# running in the foreground; use the previously
1067
# created wnull.
1068
popen_args = { "close_fds": True,
1069
"shell": True,
1070
"cwd": "/" }
1071
if (not self.server_settings["debug"]
1072
and self.server_settings["foreground"]):
1073
popen_args.update({"stdout": wnull,
1074
"stderr": wnull })
1075
pipe = multiprocessing.Pipe(duplex = False)
1076
self.checker = multiprocessing.Process(
1077
target = call_pipe,
1078
args = (pipe[1], subprocess.call, command),
1079
kwargs = popen_args)
1080
self.checker.start()
1081
self.checker_callback_tag = GLib.io_add_watch(
1082
pipe[0].fileno(), GLib.IO_IN,
1083
self.checker_callback, pipe[0], command)
1084
# Re-run this periodically if run by GLib.timeout_add
523
1085
return True
524
1086
525
1087
def stop_checker(self):
526
1088
"""Force the checker process, if any, to stop."""
527
1089
if self.checker_callback_tag:
528
gobject.source_remove(self.checker_callback_tag)
1090
GLib.source_remove(self.checker_callback_tag)
529
1091
self.checker_callback_tag = None
530
1092
if getattr(self, "checker", None) is None:
531
1093
return
532
1094
logger.debug("Stopping checker for %(name)s", vars(self))
533
try:
534
os.kill(self.checker.pid, signal.SIGTERM)
535
#time.sleep(0.5)
536
#if self.checker.poll() is None:
537
# os.kill(self.checker.pid, signal.SIGKILL)
538
except OSError as error:
539
if error.errno != errno.ESRCH: # No such process
540
raise
1095
self.checker.terminate()
541
1096
self.checker = None
542
1097
543
def dbus_service_property(dbus_interface, signature="v",
544
access="readwrite", byte_arrays=False):
1098
1099
def dbus_service_property(dbus_interface,
1100
signature="v",
1101
access="readwrite",
1102
byte_arrays=False):
545
1103
"""Decorators for marking methods of a DBusObjectWithProperties to
546
1104
become properties on the D-Bus.
547
1105
556
1114
# "Set" method, so we fail early here:
557
1115
if byte_arrays and signature != "ay":
558
1116
raise ValueError("Byte arrays not supported for non-'ay'"
559
" signature %r" % signature)
1117
" signature {!r}".format(signature))
1118
560
1119
def decorator(func):
561
1120
func._dbus_is_property = True
562
1121
func._dbus_interface = dbus_interface
567
1126
func._dbus_name = func._dbus_name[:-14]
568
1127
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
569
1128
return func
1129
1130
return decorator
1131
1132
1133
def dbus_interface_annotations(dbus_interface):
1134
"""Decorator for marking functions returning interface annotations
1135
1136
Usage:
1137
1138
@dbus_interface_annotations("org.example.Interface")
1139
def _foo(self): # Function name does not matter
1140
return {"org.freedesktop.DBus.Deprecated": "true",
1141
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1142
"false"}
1143
"""
1144
1145
def decorator(func):
1146
func._dbus_is_interface = True
1147
func._dbus_interface = dbus_interface
1148
func._dbus_name = dbus_interface
1149
return func
1150
1151
return decorator
1152
1153
1154
def dbus_annotations(annotations):
1155
"""Decorator to annotate D-Bus methods, signals or properties
1156
Usage:
1157
1158
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1159
"org.freedesktop.DBus.Property."
1160
"EmitsChangedSignal": "false"})
1161
@dbus_service_property("org.example.Interface", signature="b",
1162
access="r")
1163
def Property_dbus_property(self):
1164
return dbus.Boolean(False)
1165
1166
See also the DBusObjectWithAnnotations class.
1167
"""
1168
1169
def decorator(func):
1170
func._dbus_annotations = annotations
1171
return func
1172
570
1173
return decorator
571
1174
572
1175
573
1176
class DBusPropertyException(dbus.exceptions.DBusException):
574
1177
"""A base class for D-Bus property-related exceptions
575
1178
"""
576
def __unicode__(self):
577
return unicode(str(self))
1179
pass
578
1180
579
1181
580
1182
class DBusPropertyAccessException(DBusPropertyException):
589
1191
pass
590
1192
591
1193
592
class DBusObjectWithProperties(dbus.service.Object):
1194
class DBusObjectWithAnnotations(dbus.service.Object):
1195
"""A D-Bus object with annotations.
1196
1197
Classes inheriting from this can use the dbus_annotations
1198
decorator to add annotations to methods or signals.
1199
"""
1200
1201
@staticmethod
1202
def _is_dbus_thing(thing):
1203
"""Returns a function testing if an attribute is a D-Bus thing
1204
1205
If called like _is_dbus_thing("method") it returns a function
1206
suitable for use as predicate to inspect.getmembers().
1207
"""
1208
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1209
False)
1210
1211
def _get_all_dbus_things(self, thing):
1212
"""Returns a generator of (name, attribute) pairs
1213
"""
1214
return ((getattr(athing.__get__(self), "_dbus_name", name),
1215
athing.__get__(self))
1216
for cls in self.__class__.__mro__
1217
for name, athing in
1218
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1219
1220
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1221
out_signature = "s",
1222
path_keyword = 'object_path',
1223
connection_keyword = 'connection')
1224
def Introspect(self, object_path, connection):
1225
"""Overloading of standard D-Bus method.
1226
1227
Inserts annotation tags on methods and signals.
1228
"""
1229
xmlstring = dbus.service.Object.Introspect(self, object_path,
1230
connection)
1231
try:
1232
document = xml.dom.minidom.parseString(xmlstring)
1233
1234
for if_tag in document.getElementsByTagName("interface"):
1235
# Add annotation tags
1236
for typ in ("method", "signal"):
1237
for tag in if_tag.getElementsByTagName(typ):
1238
annots = dict()
1239
for name, prop in (self.
1240
_get_all_dbus_things(typ)):
1241
if (name == tag.getAttribute("name")
1242
and prop._dbus_interface
1243
== if_tag.getAttribute("name")):
1244
annots.update(getattr(
1245
prop, "_dbus_annotations", {}))
1246
for name, value in annots.items():
1247
ann_tag = document.createElement(
1248
"annotation")
1249
ann_tag.setAttribute("name", name)
1250
ann_tag.setAttribute("value", value)
1251
tag.appendChild(ann_tag)
1252
# Add interface annotation tags
1253
for annotation, value in dict(
1254
itertools.chain.from_iterable(
1255
annotations().items()
1256
for name, annotations
1257
in self._get_all_dbus_things("interface")
1258
if name == if_tag.getAttribute("name")
1259
)).items():
1260
ann_tag = document.createElement("annotation")
1261
ann_tag.setAttribute("name", annotation)
1262
ann_tag.setAttribute("value", value)
1263
if_tag.appendChild(ann_tag)
1264
# Fix argument name for the Introspect method itself
1265
if (if_tag.getAttribute("name")
1266
== dbus.INTROSPECTABLE_IFACE):
1267
for cn in if_tag.getElementsByTagName("method"):
1268
if cn.getAttribute("name") == "Introspect":
1269
for arg in cn.getElementsByTagName("arg"):
1270
if (arg.getAttribute("direction")
1271
== "out"):
1272
arg.setAttribute("name",
1273
"xml_data")
1274
xmlstring = document.toxml("utf-8")
1275
document.unlink()
1276
except (AttributeError, xml.dom.DOMException,
1277
xml.parsers.expat.ExpatError) as error:
1278
logger.error("Failed to override Introspection method",
1279
exc_info=error)
1280
return xmlstring
1281
1282
1283
class DBusObjectWithProperties(DBusObjectWithAnnotations):
593
1284
"""A D-Bus object with properties.
594
1285
595
1286
Classes inheriting from this can use the dbus_service_property
596
1287
decorator to expose methods as D-Bus properties. It exposes the
597
1288
standard Get(), Set(), and GetAll() methods on the D-Bus.
598
1289
"""
599
1290
600
@staticmethod
601
def _is_dbus_property(obj):
602
return getattr(obj, "_dbus_is_property", False)
603
604
def _get_all_dbus_properties(self):
605
"""Returns a generator of (name, attribute) pairs
606
"""
607
return ((prop._dbus_name, prop)
608
for name, prop in
609
inspect.getmembers(self, self._is_dbus_property))
610
611
1291
def _get_dbus_property(self, interface_name, property_name):
612
1292
"""Returns a bound method if one exists which is a D-Bus
613
1293
property with the specified name and interface.
614
1294
"""
615
for name in (property_name,
616
property_name + "_dbus_property"):
617
prop = getattr(self, name, None)
618
if (prop is None
619
or not self._is_dbus_property(prop)
620
or prop._dbus_name != property_name
621
or (interface_name and prop._dbus_interface
622
and interface_name != prop._dbus_interface)):
623
continue
624
return prop
1295
for cls in self.__class__.__mro__:
1296
for name, value in inspect.getmembers(
1297
cls, self._is_dbus_thing("property")):
1298
if (value._dbus_name == property_name
1299
and value._dbus_interface == interface_name):
1300
return value.__get__(self)
1301
625
1302
# No such property
626
raise DBusPropertyNotFound(self.dbus_object_path + ":"
627
+ interface_name + "."
628
+ property_name)
629
630
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1303
raise DBusPropertyNotFound("{}:{}.{}".format(
1304
self.dbus_object_path, interface_name, property_name))
1305
1306
@classmethod
1307
def _get_all_interface_names(cls):
1308
"""Get a sequence of all interfaces supported by an object"""
1309
return (name for name in set(getattr(getattr(x, attr),
1310
"_dbus_interface", None)
1311
for x in (inspect.getmro(cls))
1312
for attr in dir(x))
1313
if name is not None)
1314
1315
@dbus.service.method(dbus.PROPERTIES_IFACE,
1316
in_signature="ss",
631
1317
out_signature="v")
632
1318
def Get(self, interface_name, property_name):
633
1319
"""Standard D-Bus property Get() method, see D-Bus standard.
651
1337
# The byte_arrays option is not supported yet on
652
1338
# signatures other than "ay".
653
1339
if prop._dbus_signature != "ay":
654
raise ValueError
655
value = dbus.ByteArray(''.join(unichr(byte)
656
for byte in value))
1340
raise ValueError("Byte arrays not supported for non-"
1341
"'ay' signature {!r}"
1342
.format(prop._dbus_signature))
1343
value = dbus.ByteArray(b''.join(chr(byte)
1344
for byte in value))
657
1345
prop(value)
658
1346
659
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1347
@dbus.service.method(dbus.PROPERTIES_IFACE,
1348
in_signature="s",
660
1349
out_signature="a{sv}")
661
1350
def GetAll(self, interface_name):
662
1351
"""Standard D-Bus property GetAll() method, see D-Bus
663
1352
standard.
664
1353
665
1354
Note: Will not include properties with access="write".
666
1355
"""
667
all = {}
668
for name, prop in self._get_all_dbus_properties():
1356
properties = {}
1357
for name, prop in self._get_all_dbus_things("property"):
669
1358
if (interface_name
670
1359
and interface_name != prop._dbus_interface):
671
1360
# Interface non-empty but did not match
675
1364
continue
676
1365
value = prop()
677
1366
if not hasattr(value, "variant_level"):
678
all[name] = value
1367
properties[name] = value
679
1368
continue
680
all[name] = type(value)(value, variant_level=
681
value.variant_level+1)
682
return dbus.Dictionary(all, signature="sv")
1369
properties[name] = type(value)(
1370
value, variant_level = value.variant_level + 1)
1371
return dbus.Dictionary(properties, signature="sv")
1372
1373
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1374
def PropertiesChanged(self, interface_name, changed_properties,
1375
invalidated_properties):
1376
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1377
standard.
1378
"""
1379
pass
683
1380
684
1381
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
685
1382
out_signature="s",
686
1383
path_keyword='object_path',
687
1384
connection_keyword='connection')
688
1385
def Introspect(self, object_path, connection):
689
"""Standard D-Bus method, overloaded to insert property tags.
1386
"""Overloading of standard D-Bus method.
1387
1388
Inserts property tags and interface annotation tags.
690
1389
"""
691
xmlstring = dbus.service.Object.Introspect(self, object_path,
692
connection)
1390
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1391
object_path,
1392
connection)
693
1393
try:
694
1394
document = xml.dom.minidom.parseString(xmlstring)
1395
695
1396
def make_tag(document, name, prop):
696
1397
e = document.createElement("property")
697
1398
e.setAttribute("name", name)
698
1399
e.setAttribute("type", prop._dbus_signature)
699
1400
e.setAttribute("access", prop._dbus_access)
700
1401
return e
1402
701
1403
for if_tag in document.getElementsByTagName("interface"):
1404
# Add property tags
702
1405
for tag in (make_tag(document, name, prop)
703
1406
for name, prop
704
in self._get_all_dbus_properties()
1407
in self._get_all_dbus_things("property")
705
1408
if prop._dbus_interface
706
1409
== if_tag.getAttribute("name")):
707
1410
if_tag.appendChild(tag)
1411
# Add annotation tags for properties
1412
for tag in if_tag.getElementsByTagName("property"):
1413
annots = dict()
1414
for name, prop in self._get_all_dbus_things(
1415
"property"):
1416
if (name == tag.getAttribute("name")
1417
and prop._dbus_interface
1418
== if_tag.getAttribute("name")):
1419
annots.update(getattr(
1420
prop, "_dbus_annotations", {}))
1421
for name, value in annots.items():
1422
ann_tag = document.createElement(
1423
"annotation")
1424
ann_tag.setAttribute("name", name)
1425
ann_tag.setAttribute("value", value)
1426
tag.appendChild(ann_tag)
708
1427
# Add the names to the return values for the
709
1428
# "org.freedesktop.DBus.Properties" methods
710
1429
if (if_tag.getAttribute("name")
725
1444
except (AttributeError, xml.dom.DOMException,
726
1445
xml.parsers.expat.ExpatError) as error:
727
1446
logger.error("Failed to override Introspection method",
728
error)
729
return xmlstring
730
731
1447
exc_info=error)
1448
return xmlstring
1449
1450
try:
1451
dbus.OBJECT_MANAGER_IFACE
1452
except AttributeError:
1453
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1454
1455
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1456
"""A D-Bus object with an ObjectManager.
1457
1458
Classes inheriting from this exposes the standard
1459
GetManagedObjects call and the InterfacesAdded and
1460
InterfacesRemoved signals on the standard
1461
"org.freedesktop.DBus.ObjectManager" interface.
1462
1463
Note: No signals are sent automatically; they must be sent
1464
manually.
1465
"""
1466
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1467
out_signature = "a{oa{sa{sv}}}")
1468
def GetManagedObjects(self):
1469
"""This function must be overridden"""
1470
raise NotImplementedError()
1471
1472
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1473
signature = "oa{sa{sv}}")
1474
def InterfacesAdded(self, object_path, interfaces_and_properties):
1475
pass
1476
1477
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1478
def InterfacesRemoved(self, object_path, interfaces):
1479
pass
1480
1481
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1482
out_signature = "s",
1483
path_keyword = 'object_path',
1484
connection_keyword = 'connection')
1485
def Introspect(self, object_path, connection):
1486
"""Overloading of standard D-Bus method.
1487
1488
Override return argument name of GetManagedObjects to be
1489
"objpath_interfaces_and_properties"
1490
"""
1491
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1492
object_path,
1493
connection)
1494
try:
1495
document = xml.dom.minidom.parseString(xmlstring)
1496
1497
for if_tag in document.getElementsByTagName("interface"):
1498
# Fix argument name for the GetManagedObjects method
1499
if (if_tag.getAttribute("name")
1500
== dbus.OBJECT_MANAGER_IFACE):
1501
for cn in if_tag.getElementsByTagName("method"):
1502
if (cn.getAttribute("name")
1503
== "GetManagedObjects"):
1504
for arg in cn.getElementsByTagName("arg"):
1505
if (arg.getAttribute("direction")
1506
== "out"):
1507
arg.setAttribute(
1508
"name",
1509
"objpath_interfaces"
1510
"_and_properties")
1511
xmlstring = document.toxml("utf-8")
1512
document.unlink()
1513
except (AttributeError, xml.dom.DOMException,
1514
xml.parsers.expat.ExpatError) as error:
1515
logger.error("Failed to override Introspection method",
1516
exc_info = error)
1517
return xmlstring
1518
1519
def datetime_to_dbus(dt, variant_level=0):
1520
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1521
if dt is None:
1522
return dbus.String("", variant_level = variant_level)
1523
return dbus.String(dt.isoformat(), variant_level=variant_level)
1524
1525
1526
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1527
"""A class decorator; applied to a subclass of
1528
dbus.service.Object, it will add alternate D-Bus attributes with
1529
interface names according to the "alt_interface_names" mapping.
1530
Usage:
1531
1532
@alternate_dbus_interfaces({"org.example.Interface":
1533
"net.example.AlternateInterface"})
1534
class SampleDBusObject(dbus.service.Object):
1535
@dbus.service.method("org.example.Interface")
1536
def SampleDBusMethod():
1537
pass
1538
1539
The above "SampleDBusMethod" on "SampleDBusObject" will be
1540
reachable via two interfaces: "org.example.Interface" and
1541
"net.example.AlternateInterface", the latter of which will have
1542
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1543
"true", unless "deprecate" is passed with a False value.
1544
1545
This works for methods and signals, and also for D-Bus properties
1546
(from DBusObjectWithProperties) and interfaces (from the
1547
dbus_interface_annotations decorator).
1548
"""
1549
1550
def wrapper(cls):
1551
for orig_interface_name, alt_interface_name in (
1552
alt_interface_names.items()):
1553
attr = {}
1554
interface_names = set()
1555
# Go though all attributes of the class
1556
for attrname, attribute in inspect.getmembers(cls):
1557
# Ignore non-D-Bus attributes, and D-Bus attributes
1558
# with the wrong interface name
1559
if (not hasattr(attribute, "_dbus_interface")
1560
or not attribute._dbus_interface.startswith(
1561
orig_interface_name)):
1562
continue
1563
# Create an alternate D-Bus interface name based on
1564
# the current name
1565
alt_interface = attribute._dbus_interface.replace(
1566
orig_interface_name, alt_interface_name)
1567
interface_names.add(alt_interface)
1568
# Is this a D-Bus signal?
1569
if getattr(attribute, "_dbus_is_signal", False):
1570
# Extract the original non-method undecorated
1571
# function by black magic
1572
if sys.version_info.major == 2:
1573
nonmethod_func = (dict(
1574
zip(attribute.func_code.co_freevars,
1575
attribute.__closure__))
1576
["func"].cell_contents)
1577
else:
1578
nonmethod_func = (dict(
1579
zip(attribute.__code__.co_freevars,
1580
attribute.__closure__))
1581
["func"].cell_contents)
1582
# Create a new, but exactly alike, function
1583
# object, and decorate it to be a new D-Bus signal
1584
# with the alternate D-Bus interface name
1585
new_function = copy_function(nonmethod_func)
1586
new_function = (dbus.service.signal(
1587
alt_interface,
1588
attribute._dbus_signature)(new_function))
1589
# Copy annotations, if any
1590
try:
1591
new_function._dbus_annotations = dict(
1592
attribute._dbus_annotations)
1593
except AttributeError:
1594
pass
1595
# Define a creator of a function to call both the
1596
# original and alternate functions, so both the
1597
# original and alternate signals gets sent when
1598
# the function is called
1599
def fixscope(func1, func2):
1600
"""This function is a scope container to pass
1601
func1 and func2 to the "call_both" function
1602
outside of its arguments"""
1603
1604
@functools.wraps(func2)
1605
def call_both(*args, **kwargs):
1606
"""This function will emit two D-Bus
1607
signals by calling func1 and func2"""
1608
func1(*args, **kwargs)
1609
func2(*args, **kwargs)
1610
# Make wrapper function look like a D-Bus signal
1611
for name, attr in inspect.getmembers(func2):
1612
if name.startswith("_dbus_"):
1613
setattr(call_both, name, attr)
1614
1615
return call_both
1616
# Create the "call_both" function and add it to
1617
# the class
1618
attr[attrname] = fixscope(attribute, new_function)
1619
# Is this a D-Bus method?
1620
elif getattr(attribute, "_dbus_is_method", False):
1621
# Create a new, but exactly alike, function
1622
# object. Decorate it to be a new D-Bus method
1623
# with the alternate D-Bus interface name. Add it
1624
# to the class.
1625
attr[attrname] = (
1626
dbus.service.method(
1627
alt_interface,
1628
attribute._dbus_in_signature,
1629
attribute._dbus_out_signature)
1630
(copy_function(attribute)))
1631
# Copy annotations, if any
1632
try:
1633
attr[attrname]._dbus_annotations = dict(
1634
attribute._dbus_annotations)
1635
except AttributeError:
1636
pass
1637
# Is this a D-Bus property?
1638
elif getattr(attribute, "_dbus_is_property", False):
1639
# Create a new, but exactly alike, function
1640
# object, and decorate it to be a new D-Bus
1641
# property with the alternate D-Bus interface
1642
# name. Add it to the class.
1643
attr[attrname] = (dbus_service_property(
1644
alt_interface, attribute._dbus_signature,
1645
attribute._dbus_access,
1646
attribute._dbus_get_args_options
1647
["byte_arrays"])
1648
(copy_function(attribute)))
1649
# Copy annotations, if any
1650
try:
1651
attr[attrname]._dbus_annotations = dict(
1652
attribute._dbus_annotations)
1653
except AttributeError:
1654
pass
1655
# Is this a D-Bus interface?
1656
elif getattr(attribute, "_dbus_is_interface", False):
1657
# Create a new, but exactly alike, function
1658
# object. Decorate it to be a new D-Bus interface
1659
# with the alternate D-Bus interface name. Add it
1660
# to the class.
1661
attr[attrname] = (
1662
dbus_interface_annotations(alt_interface)
1663
(copy_function(attribute)))
1664
if deprecate:
1665
# Deprecate all alternate interfaces
1666
iname="_AlternateDBusNames_interface_annotation{}"
1667
for interface_name in interface_names:
1668
1669
@dbus_interface_annotations(interface_name)
1670
def func(self):
1671
return { "org.freedesktop.DBus.Deprecated":
1672
"true" }
1673
# Find an unused name
1674
for aname in (iname.format(i)
1675
for i in itertools.count()):
1676
if aname not in attr:
1677
attr[aname] = func
1678
break
1679
if interface_names:
1680
# Replace the class with a new subclass of it with
1681
# methods, signals, etc. as created above.
1682
if sys.version_info.major == 2:
1683
cls = type(b"{}Alternate".format(cls.__name__),
1684
(cls, ), attr)
1685
else:
1686
cls = type("{}Alternate".format(cls.__name__),
1687
(cls, ), attr)
1688
return cls
1689
1690
return wrapper
1691
1692
1693
@alternate_dbus_interfaces({"se.recompile.Mandos":
1694
"se.bsnet.fukt.Mandos"})
732
1695
class ClientDBus(Client, DBusObjectWithProperties):
733
1696
"""A Client class using D-Bus
734
1697
738
1701
"""
739
1702
740
1703
runtime_expansions = (Client.runtime_expansions
741
+ ("dbus_object_path",))
1704
+ ("dbus_object_path", ))
1705
1706
_interface = "se.recompile.Mandos.Client"
742
1707
743
1708
# dbus.service.Object doesn't use super(), so we can't either.
744
1709
745
1710
def __init__(self, bus = None, *args, **kwargs):
746
self._approvals_pending = 0
747
1711
self.bus = bus
748
1712
Client.__init__(self, *args, **kwargs)
749
1713
# Only now, when this client is initialized, can it show up on
750
1714
# the D-Bus
751
client_object_name = unicode(self.name).translate(
1715
client_object_name = str(self.name).translate(
752
1716
{ord("."): ord("_"),
753
1717
ord("-"): ord("_")})
754
self.dbus_object_path = (dbus.ObjectPath
755
("/clients/" + client_object_name))
1718
self.dbus_object_path = dbus.ObjectPath(
1719
"/clients/" + client_object_name)
756
1720
DBusObjectWithProperties.__init__(self, self.bus,
757
1721
self.dbus_object_path)
758
759
def _get_approvals_pending(self):
760
return self._approvals_pending
761
def _set_approvals_pending(self, value):
762
old_value = self._approvals_pending
763
self._approvals_pending = value
764
bval = bool(value)
765
if (hasattr(self, "dbus_object_path")
766
and bval is not bool(old_value)):
767
dbus_bool = dbus.Boolean(bval, variant_level=1)
768
self.PropertyChanged(dbus.String("ApprovalPending"),
769
dbus_bool)
770
771
approvals_pending = property(_get_approvals_pending,
772
_set_approvals_pending)
773
del _get_approvals_pending, _set_approvals_pending
774
775
@staticmethod
776
def _datetime_to_dbus(dt, variant_level=0):
777
"""Convert a UTC datetime.datetime() to a D-Bus type."""
778
return dbus.String(dt.isoformat(),
779
variant_level=variant_level)
780
781
def enable(self):
782
oldstate = getattr(self, "enabled", False)
783
r = Client.enable(self)
784
if oldstate != self.enabled:
785
# Emit D-Bus signals
786
self.PropertyChanged(dbus.String("Enabled"),
787
dbus.Boolean(True, variant_level=1))
788
self.PropertyChanged(
789
dbus.String("LastEnabled"),
790
self._datetime_to_dbus(self.last_enabled,
791
variant_level=1))
792
return r
793
794
def disable(self, quiet = False):
795
oldstate = getattr(self, "enabled", False)
796
r = Client.disable(self, quiet=quiet)
797
if not quiet and oldstate != self.enabled:
798
# Emit D-Bus signal
799
self.PropertyChanged(dbus.String("Enabled"),
800
dbus.Boolean(False, variant_level=1))
801
return r
1722
1723
def notifychangeproperty(transform_func, dbus_name,
1724
type_func=lambda x: x,
1725
variant_level=1,
1726
invalidate_only=False,
1727
_interface=_interface):
1728
""" Modify a variable so that it's a property which announces
1729
its changes to DBus.
1730
1731
transform_fun: Function that takes a value and a variant_level
1732
and transforms it to a D-Bus type.
1733
dbus_name: D-Bus name of the variable
1734
type_func: Function that transform the value before sending it
1735
to the D-Bus. Default: no transform
1736
variant_level: D-Bus variant level. Default: 1
1737
"""
1738
attrname = "_{}".format(dbus_name)
1739
1740
def setter(self, value):
1741
if hasattr(self, "dbus_object_path"):
1742
if (not hasattr(self, attrname) or
1743
type_func(getattr(self, attrname, None))
1744
!= type_func(value)):
1745
if invalidate_only:
1746
self.PropertiesChanged(
1747
_interface, dbus.Dictionary(),
1748
dbus.Array((dbus_name, )))
1749
else:
1750
dbus_value = transform_func(
1751
type_func(value),
1752
variant_level = variant_level)
1753
self.PropertyChanged(dbus.String(dbus_name),
1754
dbus_value)
1755
self.PropertiesChanged(
1756
_interface,
1757
dbus.Dictionary({ dbus.String(dbus_name):
1758
dbus_value }),
1759
dbus.Array())
1760
setattr(self, attrname, value)
1761
1762
return property(lambda self: getattr(self, attrname), setter)
1763
1764
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1765
approvals_pending = notifychangeproperty(dbus.Boolean,
1766
"ApprovalPending",
1767
type_func = bool)
1768
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1769
last_enabled = notifychangeproperty(datetime_to_dbus,
1770
"LastEnabled")
1771
checker = notifychangeproperty(
1772
dbus.Boolean, "CheckerRunning",
1773
type_func = lambda checker: checker is not None)
1774
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1775
"LastCheckedOK")
1776
last_checker_status = notifychangeproperty(dbus.Int16,
1777
"LastCheckerStatus")
1778
last_approval_request = notifychangeproperty(
1779
datetime_to_dbus, "LastApprovalRequest")
1780
approved_by_default = notifychangeproperty(dbus.Boolean,
1781
"ApprovedByDefault")
1782
approval_delay = notifychangeproperty(
1783
dbus.UInt64, "ApprovalDelay",
1784
type_func = lambda td: td.total_seconds() * 1000)
1785
approval_duration = notifychangeproperty(
1786
dbus.UInt64, "ApprovalDuration",
1787
type_func = lambda td: td.total_seconds() * 1000)
1788
host = notifychangeproperty(dbus.String, "Host")
1789
timeout = notifychangeproperty(
1790
dbus.UInt64, "Timeout",
1791
type_func = lambda td: td.total_seconds() * 1000)
1792
extended_timeout = notifychangeproperty(
1793
dbus.UInt64, "ExtendedTimeout",
1794
type_func = lambda td: td.total_seconds() * 1000)
1795
interval = notifychangeproperty(
1796
dbus.UInt64, "Interval",
1797
type_func = lambda td: td.total_seconds() * 1000)
1798
checker_command = notifychangeproperty(dbus.String, "Checker")
1799
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1800
invalidate_only=True)
1801
1802
del notifychangeproperty
802
1803
803
1804
def __del__(self, *args, **kwargs):
804
1805
try:
809
1810
DBusObjectWithProperties.__del__(self, *args, **kwargs)
810
1811
Client.__del__(self, *args, **kwargs)
811
1812
812
def checker_callback(self, pid, condition, command,
813
*args, **kwargs):
814
self.checker_callback_tag = None
815
self.checker = None
816
# Emit D-Bus signal
817
self.PropertyChanged(dbus.String("CheckerRunning"),
818
dbus.Boolean(False, variant_level=1))
819
if os.WIFEXITED(condition):
820
exitstatus = os.WEXITSTATUS(condition)
1813
def checker_callback(self, source, condition,
1814
connection, command, *args, **kwargs):
1815
ret = Client.checker_callback(self, source, condition,
1816
connection, command, *args,
1817
**kwargs)
1818
exitstatus = self.last_checker_status
1819
if exitstatus >= 0:
821
1820
# Emit D-Bus signal
822
1821
self.CheckerCompleted(dbus.Int16(exitstatus),
823
dbus.Int64(condition),
1822
# This is specific to GNU libC
1823
dbus.Int64(exitstatus << 8),
824
1824
dbus.String(command))
825
1825
else:
826
1826
# Emit D-Bus signal
827
1827
self.CheckerCompleted(dbus.Int16(-1),
828
dbus.Int64(condition),
1828
dbus.Int64(
1829
# This is specific to GNU libC
1830
(exitstatus << 8)
1831
| self.last_checker_signal),
829
1832
dbus.String(command))
830
831
return Client.checker_callback(self, pid, condition, command,
832
*args, **kwargs)
833
834
def checked_ok(self, *args, **kwargs):
835
Client.checked_ok(self, *args, **kwargs)
836
# Emit D-Bus signal
837
self.PropertyChanged(
838
dbus.String("LastCheckedOK"),
839
(self._datetime_to_dbus(self.last_checked_ok,
840
variant_level=1)))
841
842
def need_approval(self, *args, **kwargs):
843
r = Client.need_approval(self, *args, **kwargs)
844
# Emit D-Bus signal
845
self.PropertyChanged(
846
dbus.String("LastApprovalRequest"),
847
(self._datetime_to_dbus(self.last_approval_request,
848
variant_level=1)))
849
return r
1833
return ret
850
1834
851
1835
def start_checker(self, *args, **kwargs):
852
old_checker = self.checker
853
if self.checker is not None:
854
old_checker_pid = self.checker.pid
855
else:
856
old_checker_pid = None
1836
old_checker_pid = getattr(self.checker, "pid", None)
857
1837
r = Client.start_checker(self, *args, **kwargs)
858
1838
# Only if new checker process was started
859
1839
if (self.checker is not None
860
1840
and old_checker_pid != self.checker.pid):
861
1841
# Emit D-Bus signal
862
1842
self.CheckerStarted(self.current_checker_command)
863
self.PropertyChanged(
864
dbus.String("CheckerRunning"),
865
dbus.Boolean(True, variant_level=1))
866
1843
return r
867
1844
868
def stop_checker(self, *args, **kwargs):
869
old_checker = getattr(self, "checker", None)
870
r = Client.stop_checker(self, *args, **kwargs)
871
if (old_checker is not None
872
and getattr(self, "checker", None) is None):
873
self.PropertyChanged(dbus.String("CheckerRunning"),
874
dbus.Boolean(False, variant_level=1))
875
return r
876
877
1845
def _reset_approved(self):
878
self._approved = None
1846
self.approved = None
879
1847
return False
880
1848
881
1849
def approve(self, value=True):
1850
self.approved = value
1851
GLib.timeout_add(int(self.approval_duration.total_seconds()
1852
* 1000), self._reset_approved)
882
1853
self.send_changedstate()
883
self._approved = value
884
gobject.timeout_add(self._timedelta_to_milliseconds
885
(self.approval_duration),
886
self._reset_approved)
887
888
1854
889
1855
## D-Bus methods, signals & properties
890
_interface = "se.bsnet.fukt.Mandos.Client"
1856
1857
## Interfaces
891
1858
892
1859
## Signals
893
1860
904
1871
pass
905
1872
906
1873
# PropertyChanged - signal
1874
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
907
1875
@dbus.service.signal(_interface, signature="sv")
908
1876
def PropertyChanged(self, property, value):
909
1877
"D-Bus signal"
943
1911
self.checked_ok()
944
1912
945
1913
# Enable - method
1914
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
946
1915
@dbus.service.method(_interface)
947
1916
def Enable(self):
948
1917
"D-Bus method"
949
1918
self.enable()
950
1919
951
1920
# StartChecker - method
1921
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
952
1922
@dbus.service.method(_interface)
953
1923
def StartChecker(self):
954
1924
"D-Bus method"
955
1925
self.start_checker()
956
1926
957
1927
# Disable - method
1928
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
958
1929
@dbus.service.method(_interface)
959
1930
def Disable(self):
960
1931
"D-Bus method"
961
1932
self.disable()
962
1933
963
1934
# StopChecker - method
1935
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
964
1936
@dbus.service.method(_interface)
965
1937
def StopChecker(self):
966
1938
self.stop_checker()
973
1945
return dbus.Boolean(bool(self.approvals_pending))
974
1946
975
1947
# ApprovedByDefault - property
976
@dbus_service_property(_interface, signature="b",
1948
@dbus_service_property(_interface,
1949
signature="b",
977
1950
access="readwrite")
978
1951
def ApprovedByDefault_dbus_property(self, value=None):
979
1952
if value is None: # get
980
1953
return dbus.Boolean(self.approved_by_default)
981
1954
self.approved_by_default = bool(value)
982
# Emit D-Bus signal
983
self.PropertyChanged(dbus.String("ApprovedByDefault"),
984
dbus.Boolean(value, variant_level=1))
985
1955
986
1956
# ApprovalDelay - property
987
@dbus_service_property(_interface, signature="t",
1957
@dbus_service_property(_interface,
1958
signature="t",
988
1959
access="readwrite")
989
1960
def ApprovalDelay_dbus_property(self, value=None):
990
1961
if value is None: # get
991
return dbus.UInt64(self.approval_delay_milliseconds())
1962
return dbus.UInt64(self.approval_delay.total_seconds()
1963
* 1000)
992
1964
self.approval_delay = datetime.timedelta(0, 0, 0, value)
993
# Emit D-Bus signal
994
self.PropertyChanged(dbus.String("ApprovalDelay"),
995
dbus.UInt64(value, variant_level=1))
996
1965
997
1966
# ApprovalDuration - property
998
@dbus_service_property(_interface, signature="t",
1967
@dbus_service_property(_interface,
1968
signature="t",
999
1969
access="readwrite")
1000
1970
def ApprovalDuration_dbus_property(self, value=None):
1001
1971
if value is None: # get
1002
return dbus.UInt64(self._timedelta_to_milliseconds(
1003
self.approval_duration))
1972
return dbus.UInt64(self.approval_duration.total_seconds()
1973
* 1000)
1004
1974
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1005
# Emit D-Bus signal
1006
self.PropertyChanged(dbus.String("ApprovalDuration"),
1007
dbus.UInt64(value, variant_level=1))
1008
1975
1009
1976
# Name - property
1977
@dbus_annotations(
1978
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1010
1979
@dbus_service_property(_interface, signature="s", access="read")
1011
1980
def Name_dbus_property(self):
1012
1981
return dbus.String(self.name)
1013
1982
1014
1983
# Fingerprint - property
1984
@dbus_annotations(
1985
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1015
1986
@dbus_service_property(_interface, signature="s", access="read")
1016
1987
def Fingerprint_dbus_property(self):
1017
1988
return dbus.String(self.fingerprint)
1018
1989
1019
1990
# Host - property
1020
@dbus_service_property(_interface, signature="s",
1991
@dbus_service_property(_interface,
1992
signature="s",
1021
1993
access="readwrite")
1022
1994
def Host_dbus_property(self, value=None):
1023
1995
if value is None: # get
1024
1996
return dbus.String(self.host)
1025
self.host = value
1026
# Emit D-Bus signal
1027
self.PropertyChanged(dbus.String("Host"),
1028
dbus.String(value, variant_level=1))
1997
self.host = str(value)
1029
1998
1030
1999
# Created - property
2000
@dbus_annotations(
2001
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1031
2002
@dbus_service_property(_interface, signature="s", access="read")
1032
2003
def Created_dbus_property(self):
1033
return dbus.String(self._datetime_to_dbus(self.created))
2004
return datetime_to_dbus(self.created)
1034
2005
1035
2006
# LastEnabled - property
1036
2007
@dbus_service_property(_interface, signature="s", access="read")
1037
2008
def LastEnabled_dbus_property(self):
1038
if self.last_enabled is None:
1039
return dbus.String("")
1040
return dbus.String(self._datetime_to_dbus(self.last_enabled))
2009
return datetime_to_dbus(self.last_enabled)
1041
2010
1042
2011
# Enabled - property
1043
@dbus_service_property(_interface, signature="b",
2012
@dbus_service_property(_interface,
2013
signature="b",
1044
2014
access="readwrite")
1045
2015
def Enabled_dbus_property(self, value=None):
1046
2016
if value is None: # get
1051
2021
self.disable()
1052
2022
1053
2023
# LastCheckedOK - property
1054
@dbus_service_property(_interface, signature="s",
2024
@dbus_service_property(_interface,
2025
signature="s",
1055
2026
access="readwrite")
1056
2027
def LastCheckedOK_dbus_property(self, value=None):
1057
2028
if value is not None:
1058
2029
self.checked_ok()
1059
2030
return
1060
if self.last_checked_ok is None:
1061
return dbus.String("")
1062
return dbus.String(self._datetime_to_dbus(self
1063
.last_checked_ok))
2031
return datetime_to_dbus(self.last_checked_ok)
2032
2033
# LastCheckerStatus - property
2034
@dbus_service_property(_interface, signature="n", access="read")
2035
def LastCheckerStatus_dbus_property(self):
2036
return dbus.Int16(self.last_checker_status)
2037
2038
# Expires - property
2039
@dbus_service_property(_interface, signature="s", access="read")
2040
def Expires_dbus_property(self):
2041
return datetime_to_dbus(self.expires)
1064
2042
1065
2043
# LastApprovalRequest - property
1066
2044
@dbus_service_property(_interface, signature="s", access="read")
1067
2045
def LastApprovalRequest_dbus_property(self):
1068
if self.last_approval_request is None:
1069
return dbus.String("")
1070
return dbus.String(self.
1071
_datetime_to_dbus(self
1072
.last_approval_request))
2046
return datetime_to_dbus(self.last_approval_request)
1073
2047
1074
2048
# Timeout - property
1075
@dbus_service_property(_interface, signature="t",
2049
@dbus_service_property(_interface,
2050
signature="t",
1076
2051
access="readwrite")
1077
2052
def Timeout_dbus_property(self, value=None):
1078
2053
if value is None: # get
1079
return dbus.UInt64(self.timeout_milliseconds())
2054
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2055
old_timeout = self.timeout
1080
2056
self.timeout = datetime.timedelta(0, 0, 0, value)
1081
# Emit D-Bus signal
1082
self.PropertyChanged(dbus.String("Timeout"),
1083
dbus.UInt64(value, variant_level=1))
1084
if getattr(self, "disable_initiator_tag", None) is None:
1085
return
1086
# Reschedule timeout
1087
gobject.source_remove(self.disable_initiator_tag)
1088
self.disable_initiator_tag = None
1089
time_to_die = (self.
1090
_timedelta_to_milliseconds((self
1091
.last_checked_ok
1092
+ self.timeout)
1093
- datetime.datetime
1094
.utcnow()))
1095
if time_to_die <= 0:
1096
# The timeout has passed
1097
self.disable()
1098
else:
1099
self.disable_initiator_tag = (gobject.timeout_add
1100
(time_to_die, self.disable))
2057
# Reschedule disabling
2058
if self.enabled:
2059
now = datetime.datetime.utcnow()
2060
self.expires += self.timeout - old_timeout
2061
if self.expires <= now:
2062
# The timeout has passed
2063
self.disable()
2064
else:
2065
if (getattr(self, "disable_initiator_tag", None)
2066
is None):
2067
return
2068
GLib.source_remove(self.disable_initiator_tag)
2069
self.disable_initiator_tag = GLib.timeout_add(
2070
int((self.expires - now).total_seconds() * 1000),
2071
self.disable)
2072
2073
# ExtendedTimeout - property
2074
@dbus_service_property(_interface,
2075
signature="t",
2076
access="readwrite")
2077
def ExtendedTimeout_dbus_property(self, value=None):
2078
if value is None: # get
2079
return dbus.UInt64(self.extended_timeout.total_seconds()
2080
* 1000)
2081
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1101
2082
1102
2083
# Interval - property
1103
@dbus_service_property(_interface, signature="t",
2084
@dbus_service_property(_interface,
2085
signature="t",
1104
2086
access="readwrite")
1105
2087
def Interval_dbus_property(self, value=None):
1106
2088
if value is None: # get
1107
return dbus.UInt64(self.interval_milliseconds())
2089
return dbus.UInt64(self.interval.total_seconds() * 1000)
1108
2090
self.interval = datetime.timedelta(0, 0, 0, value)
1109
# Emit D-Bus signal
1110
self.PropertyChanged(dbus.String("Interval"),
1111
dbus.UInt64(value, variant_level=1))
1112
2091
if getattr(self, "checker_initiator_tag", None) is None:
1113
2092
return
1114
# Reschedule checker run
1115
gobject.source_remove(self.checker_initiator_tag)
1116
self.checker_initiator_tag = (gobject.timeout_add
1117
(value, self.start_checker))
1118
self.start_checker() # Start one now, too
1119
2093
if self.enabled:
2094
# Reschedule checker run
2095
GLib.source_remove(self.checker_initiator_tag)
2096
self.checker_initiator_tag = GLib.timeout_add(
2097
value, self.start_checker)
2098
self.start_checker() # Start one now, too
2099
1120
2100
# Checker - property
1121
@dbus_service_property(_interface, signature="s",
2101
@dbus_service_property(_interface,
2102
signature="s",
1122
2103
access="readwrite")
1123
2104
def Checker_dbus_property(self, value=None):
1124
2105
if value is None: # get
1125
2106
return dbus.String(self.checker_command)
1126
self.checker_command = value
1127
# Emit D-Bus signal
1128
self.PropertyChanged(dbus.String("Checker"),
1129
dbus.String(self.checker_command,
1130
variant_level=1))
2107
self.checker_command = str(value)
1131
2108
1132
2109
# CheckerRunning - property
1133
@dbus_service_property(_interface, signature="b",
2110
@dbus_service_property(_interface,
2111
signature="b",
1134
2112
access="readwrite")
1135
2113
def CheckerRunning_dbus_property(self, value=None):
1136
2114
if value is None: # get
1141
2119
self.stop_checker()
1142
2120
1143
2121
# ObjectPath - property
2122
@dbus_annotations(
2123
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2124
"org.freedesktop.DBus.Deprecated": "true"})
1144
2125
@dbus_service_property(_interface, signature="o", access="read")
1145
2126
def ObjectPath_dbus_property(self):
1146
2127
return self.dbus_object_path # is already a dbus.ObjectPath
1147
2128
1148
2129
# Secret = property
1149
@dbus_service_property(_interface, signature="ay",
1150
access="write", byte_arrays=True)
2130
@dbus_annotations(
2131
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2132
"invalidates"})
2133
@dbus_service_property(_interface,
2134
signature="ay",
2135
access="write",
2136
byte_arrays=True)
1151
2137
def Secret_dbus_property(self, value):
1152
self.secret = str(value)
2138
self.secret = bytes(value)
1153
2139
1154
2140
del _interface
1155
2141
1159
2145
self._pipe = child_pipe
1160
2146
self._pipe.send(('init', fpr, address))
1161
2147
if not self._pipe.recv():
1162
raise KeyError()
1163
2148
raise KeyError(fpr)
2149
1164
2150
def __getattribute__(self, name):
1165
if(name == '_pipe'):
2151
if name == '_pipe':
1166
2152
return super(ProxyClient, self).__getattribute__(name)
1167
2153
self._pipe.send(('getattr', name))
1168
2154
data = self._pipe.recv()
1169
2155
if data[0] == 'data':
1170
2156
return data[1]
1171
2157
if data[0] == 'function':
2158
1172
2159
def func(*args, **kwargs):
1173
2160
self._pipe.send(('funcall', name, args, kwargs))
1174
2161
return self._pipe.recv()[1]
2162
1175
2163
return func
1176
2164
1177
2165
def __setattr__(self, name, value):
1178
if(name == '_pipe'):
2166
if name == '_pipe':
1179
2167
return super(ProxyClient, self).__setattr__(name, value)
1180
2168
self._pipe.send(('setattr', name, value))
1181
2169
1189
2177
def handle(self):
1190
2178
with contextlib.closing(self.server.child_pipe) as child_pipe:
1191
2179
logger.info("TCP connection from: %s",
1192
unicode(self.client_address))
2180
str(self.client_address))
1193
2181
logger.debug("Pipe FD: %d",
1194
2182
self.server.child_pipe.fileno())
1195
1196
session = (gnutls.connection
1197
.ClientSession(self.request,
1198
gnutls.connection
1199
.X509Credentials()))
1200
1201
# Note: gnutls.connection.X509Credentials is really a
1202
# generic GnuTLS certificate credentials object so long as
1203
# no X.509 keys are added to it. Therefore, we can use it
1204
# here despite using OpenPGP certificates.
1205
2183
2184
session = gnutls.ClientSession(self.request)
2185
1206
2186
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1207
2187
# "+AES-256-CBC", "+SHA1",
1208
2188
# "+COMP-NULL", "+CTYPE-OPENPGP",
1211
2191
priority = self.server.gnutls_priority
1212
2192
if priority is None:
1213
2193
priority = "NORMAL"
1214
(gnutls.library.functions
1215
.gnutls_priority_set_direct(session._c_object,
1216
priority, None))
1217
2194
gnutls.priority_set_direct(session._c_object,
2195
priority.encode("utf-8"),
2196
None)
2197
1218
2198
# Start communication using the Mandos protocol
1219
2199
# Get protocol number
1220
2200
line = self.request.makefile().readline()
1221
2201
logger.debug("Protocol version: %r", line)
1222
2202
try:
1223
2203
if int(line.strip().split()[0]) > 1:
1224
raise RuntimeError
2204
raise RuntimeError(line)
1225
2205
except (ValueError, IndexError, RuntimeError) as error:
1226
2206
logger.error("Unknown protocol version: %s", error)
1227
2207
return
1228
2208
1229
2209
# Start GnuTLS connection
1230
2210
try:
1231
2211
session.handshake()
1232
except gnutls.errors.GNUTLSError as error:
2212
except gnutls.Error as error:
1233
2213
logger.warning("Handshake failed: %s", error)
1234
2214
# Do not run session.bye() here: the session is not
1235
2215
# established. Just abandon the request.
1236
2216
return
1237
2217
logger.debug("Handshake succeeded")
1238
2218
1239
2219
approval_required = False
1240
2220
try:
1241
2221
try:
1242
fpr = self.fingerprint(self.peer_certificate
1243
(session))
1244
except (TypeError,
1245
gnutls.errors.GNUTLSError) as error:
2222
fpr = self.fingerprint(
2223
self.peer_certificate(session))
2224
except (TypeError, gnutls.Error) as error:
1246
2225
logger.warning("Bad certificate: %s", error)
1247
2226
return
1248
2227
logger.debug("Fingerprint: %s", fpr)
1249
2228
1250
2229
try:
1251
2230
client = ProxyClient(child_pipe, fpr,
1252
2231
self.client_address)
1260
2239
1261
2240
while True:
1262
2241
if not client.enabled:
1263
logger.warning("Client %s is disabled",
1264
client.name)
2242
logger.info("Client %s is disabled",
2243
client.name)
1265
2244
if self.server.use_dbus:
1266
2245
# Emit D-Bus signal
1267
client.Rejected("Disabled")
2246
client.Rejected("Disabled")
1268
2247
return
1269
2248
1270
if client._approved or not client.approval_delay:
2249
if client.approved or not client.approval_delay:
1271
2250
#We are approved or approval is disabled
1272
2251
break
1273
elif client._approved is None:
2252
elif client.approved is None:
1274
2253
logger.info("Client %s needs approval",
1275
2254
client.name)
1276
2255
if self.server.use_dbus:
1277
2256
# Emit D-Bus signal
1278
2257
client.NeedApproval(
1279
client.approval_delay_milliseconds(),
1280
client.approved_by_default)
2258
client.approval_delay.total_seconds()
2259
* 1000, client.approved_by_default)
1281
2260
else:
1282
2261
logger.warning("Client %s was not approved",
1283
2262
client.name)
1287
2266
return
1288
2267
1289
2268
#wait until timeout or approved
1290
#x = float(client._timedelta_to_milliseconds(delay))
1291
2269
time = datetime.datetime.now()
1292
2270
client.changedstate.acquire()
1293
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
2271
client.changedstate.wait(delay.total_seconds())
1294
2272
client.changedstate.release()
1295
2273
time2 = datetime.datetime.now()
1296
2274
if (time2 - time) >= delay:
1307
2285
else:
1308
2286
delay -= time2 - time
1309
2287
1310
sent_size = 0
1311
while sent_size < len(client.secret):
1312
try:
1313
sent = session.send(client.secret[sent_size:])
1314
except gnutls.errors.GNUTLSError as error:
1315
logger.warning("gnutls send failed")
1316
return
1317
logger.debug("Sent: %d, remaining: %d",
1318
sent, len(client.secret)
1319
- (sent_size + sent))
1320
sent_size += sent
1321
2288
try:
2289
session.send(client.secret)
2290
except gnutls.Error as error:
2291
logger.warning("gnutls send failed",
2292
exc_info = error)
2293
return
2294
1322
2295
logger.info("Sending secret to %s", client.name)
1323
# bump the timeout as if seen
1324
client.checked_ok()
2296
# bump the timeout using extended_timeout
2297
client.bump_timeout(client.extended_timeout)
1325
2298
if self.server.use_dbus:
1326
2299
# Emit D-Bus signal
1327
2300
client.GotSecret()
1331
2304
client.approvals_pending -= 1
1332
2305
try:
1333
2306
session.bye()
1334
except gnutls.errors.GNUTLSError as error:
1335
logger.warning("GnuTLS bye failed")
2307
except gnutls.Error as error:
2308
logger.warning("GnuTLS bye failed",
2309
exc_info=error)
1336
2310
1337
2311
@staticmethod
1338
2312
def peer_certificate(session):
1339
2313
"Return the peer's OpenPGP certificate as a bytestring"
1340
2314
# If not an OpenPGP certificate...
1341
if (gnutls.library.functions
1342
.gnutls_certificate_type_get(session._c_object)
1343
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1344
# ...do the normal thing
1345
return session.peer_certificate
2315
if (gnutls.certificate_type_get(session._c_object)
2316
!= gnutls.CRT_OPENPGP):
2317
# ...return invalid data
2318
return b""
1346
2319
list_size = ctypes.c_uint(1)
1347
cert_list = (gnutls.library.functions
1348
.gnutls_certificate_get_peers
2320
cert_list = (gnutls.certificate_get_peers
1349
2321
(session._c_object, ctypes.byref(list_size)))
1350
2322
if not bool(cert_list) and list_size.value != 0:
1351
raise gnutls.errors.GNUTLSError("error getting peer"
1352
" certificate")
2323
raise gnutls.Error("error getting peer certificate")
1353
2324
if list_size.value == 0:
1354
2325
return None
1355
2326
cert = cert_list[0]
1359
2330
def fingerprint(openpgp):
1360
2331
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1361
2332
# New GnuTLS "datum" with the OpenPGP public key
1362
datum = (gnutls.library.types
1363
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1364
ctypes.POINTER
1365
(ctypes.c_ubyte)),
1366
ctypes.c_uint(len(openpgp))))
2333
datum = gnutls.datum_t(
2334
ctypes.cast(ctypes.c_char_p(openpgp),
2335
ctypes.POINTER(ctypes.c_ubyte)),
2336
ctypes.c_uint(len(openpgp)))
1367
2337
# New empty GnuTLS certificate
1368
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1369
(gnutls.library.functions
1370
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2338
crt = gnutls.openpgp_crt_t()
2339
gnutls.openpgp_crt_init(ctypes.byref(crt))
1371
2340
# Import the OpenPGP public key into the certificate
1372
(gnutls.library.functions
1373
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1374
gnutls.library.constants
1375
.GNUTLS_OPENPGP_FMT_RAW))
2341
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2342
gnutls.OPENPGP_FMT_RAW)
1376
2343
# Verify the self signature in the key
1377
2344
crtverify = ctypes.c_uint()
1378
(gnutls.library.functions
1379
.gnutls_openpgp_crt_verify_self(crt, 0,
1380
ctypes.byref(crtverify)))
2345
gnutls.openpgp_crt_verify_self(crt, 0,
2346
ctypes.byref(crtverify))
1381
2347
if crtverify.value != 0:
1382
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1383
raise (gnutls.errors.CertificateSecurityError
1384
("Verify failed"))
2348
gnutls.openpgp_crt_deinit(crt)
2349
raise gnutls.CertificateSecurityError("Verify failed")
1385
2350
# New buffer for the fingerprint
1386
2351
buf = ctypes.create_string_buffer(20)
1387
2352
buf_len = ctypes.c_size_t()
1388
2353
# Get the fingerprint from the certificate into the buffer
1389
(gnutls.library.functions
1390
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1391
ctypes.byref(buf_len)))
2354
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2355
ctypes.byref(buf_len))
1392
2356
# Deinit the certificate
1393
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2357
gnutls.openpgp_crt_deinit(crt)
1394
2358
# Convert the buffer to a Python bytestring
1395
2359
fpr = ctypes.string_at(buf, buf_len.value)
1396
2360
# Convert the bytestring to hexadecimal notation
1397
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2361
hex_fpr = binascii.hexlify(fpr).upper()
1398
2362
return hex_fpr
1399
2363
1400
2364
1401
2365
class MultiprocessingMixIn(object):
1402
2366
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2367
1403
2368
def sub_process_main(self, request, address):
1404
2369
try:
1405
2370
self.finish_request(request, address)
1406
except:
2371
except Exception:
1407
2372
self.handle_error(request, address)
1408
2373
self.close_request(request)
1409
2374
1410
2375
def process_request(self, request, address):
1411
2376
"""Start a new process to process the request."""
1412
multiprocessing.Process(target = self.sub_process_main,
1413
args = (request, address)).start()
2377
proc = multiprocessing.Process(target = self.sub_process_main,
2378
args = (request, address))
2379
proc.start()
2380
return proc
2381
1414
2382
1415
2383
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1416
2384
""" adds a pipe to the MixIn """
2385
1417
2386
def process_request(self, request, client_address):
1418
2387
"""Overrides and wraps the original process_request().
1419
2388
1420
2389
This function creates a new pipe in self.pipe
1421
2390
"""
1422
2391
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1423
1424
super(MultiprocessingMixInWithPipe,
1425
self).process_request(request, client_address)
2392
2393
proc = MultiprocessingMixIn.process_request(self, request,
2394
client_address)
1426
2395
self.child_pipe.close()
1427
self.add_pipe(parent_pipe)
1428
1429
def add_pipe(self, parent_pipe):
2396
self.add_pipe(parent_pipe, proc)
2397
2398
def add_pipe(self, parent_pipe, proc):
1430
2399
"""Dummy function; override as necessary"""
1431
raise NotImplementedError
2400
raise NotImplementedError()
2401
1432
2402
1433
2403
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1434
2404
socketserver.TCPServer, object):
1439
2409
interface: None or a network interface name (string)
1440
2410
use_ipv6: Boolean; to use IPv6 or not
1441
2411
"""
2412
1442
2413
def __init__(self, server_address, RequestHandlerClass,
1443
interface=None, use_ipv6=True):
2414
interface=None,
2415
use_ipv6=True,
2416
socketfd=None):
2417
"""If socketfd is set, use that file descriptor instead of
2418
creating a new one with socket.socket().
2419
"""
1444
2420
self.interface = interface
1445
2421
if use_ipv6:
1446
2422
self.address_family = socket.AF_INET6
2423
if socketfd is not None:
2424
# Save the file descriptor
2425
self.socketfd = socketfd
2426
# Save the original socket.socket() function
2427
self.socket_socket = socket.socket
2428
# To implement --socket, we monkey patch socket.socket.
2429
#
2430
# (When socketserver.TCPServer is a new-style class, we
2431
# could make self.socket into a property instead of monkey
2432
# patching socket.socket.)
2433
#
2434
# Create a one-time-only replacement for socket.socket()
2435
@functools.wraps(socket.socket)
2436
def socket_wrapper(*args, **kwargs):
2437
# Restore original function so subsequent calls are
2438
# not affected.
2439
socket.socket = self.socket_socket
2440
del self.socket_socket
2441
# This time only, return a new socket object from the
2442
# saved file descriptor.
2443
return socket.fromfd(self.socketfd, *args, **kwargs)
2444
# Replace socket.socket() function with wrapper
2445
socket.socket = socket_wrapper
2446
# The socketserver.TCPServer.__init__ will call
2447
# socket.socket(), which might be our replacement,
2448
# socket_wrapper(), if socketfd was set.
1447
2449
socketserver.TCPServer.__init__(self, server_address,
1448
2450
RequestHandlerClass)
2451
1449
2452
def server_bind(self):
1450
2453
"""This overrides the normal server_bind() function
1451
2454
to bind to an interface if one was specified, and also NOT to
1452
2455
bind to an address or port if they were not specified."""
2456
global SO_BINDTODEVICE
1453
2457
if self.interface is not None:
1454
2458
if SO_BINDTODEVICE is None:
1455
logger.error("SO_BINDTODEVICE does not exist;"
1456
" cannot bind to interface %s",
1457
self.interface)
1458
else:
1459
try:
1460
self.socket.setsockopt(socket.SOL_SOCKET,
1461
SO_BINDTODEVICE,
1462
str(self.interface
1463
+ '\0'))
1464
except socket.error as error:
1465
if error[0] == errno.EPERM:
1466
logger.error("No permission to"
1467
" bind to interface %s",
1468
self.interface)
1469
elif error[0] == errno.ENOPROTOOPT:
1470
logger.error("SO_BINDTODEVICE not available;"
1471
" cannot bind to interface %s",
1472
self.interface)
1473
else:
1474
raise
2459
# Fall back to a hard-coded value which seems to be
2460
# common enough.
2461
logger.warning("SO_BINDTODEVICE not found, trying 25")
2462
SO_BINDTODEVICE = 25
2463
try:
2464
self.socket.setsockopt(
2465
socket.SOL_SOCKET, SO_BINDTODEVICE,
2466
(self.interface + "\0").encode("utf-8"))
2467
except socket.error as error:
2468
if error.errno == errno.EPERM:
2469
logger.error("No permission to bind to"
2470
" interface %s", self.interface)
2471
elif error.errno == errno.ENOPROTOOPT:
2472
logger.error("SO_BINDTODEVICE not available;"
2473
" cannot bind to interface %s",
2474
self.interface)
2475
elif error.errno == errno.ENODEV:
2476
logger.error("Interface %s does not exist,"
2477
" cannot bind", self.interface)
2478
else:
2479
raise
1475
2480
# Only bind(2) the socket if we really need to.
1476
2481
if self.server_address[0] or self.server_address[1]:
1477
2482
if not self.server_address[0]:
1478
2483
if self.address_family == socket.AF_INET6:
1479
2484
any_address = "::" # in6addr_any
1480
2485
else:
1481
any_address = socket.INADDR_ANY
2486
any_address = "0.0.0.0" # INADDR_ANY
1482
2487
self.server_address = (any_address,
1483
2488
self.server_address[1])
1484
2489
elif not self.server_address[1]:
1485
self.server_address = (self.server_address[0],
1486
0)
2490
self.server_address = (self.server_address[0], 0)
1487
2491
# if self.interface:
1488
2492
# self.server_address = (self.server_address[0],
1489
2493
# 0, # port
1501
2505
gnutls_priority GnuTLS priority string
1502
2506
use_dbus: Boolean; to emit D-Bus signals or not
1503
2507
1504
Assumes a gobject.MainLoop event loop.
2508
Assumes a GLib.MainLoop event loop.
1505
2509
"""
2510
1506
2511
def __init__(self, server_address, RequestHandlerClass,
1507
interface=None, use_ipv6=True, clients=None,
1508
gnutls_priority=None, use_dbus=True):
2512
interface=None,
2513
use_ipv6=True,
2514
clients=None,
2515
gnutls_priority=None,
2516
use_dbus=True,
2517
socketfd=None):
1509
2518
self.enabled = False
1510
2519
self.clients = clients
1511
2520
if self.clients is None:
1512
self.clients = set()
2521
self.clients = {}
1513
2522
self.use_dbus = use_dbus
1514
2523
self.gnutls_priority = gnutls_priority
1515
2524
IPv6_TCPServer.__init__(self, server_address,
1516
2525
RequestHandlerClass,
1517
2526
interface = interface,
1518
use_ipv6 = use_ipv6)
2527
use_ipv6 = use_ipv6,
2528
socketfd = socketfd)
2529
1519
2530
def server_activate(self):
1520
2531
if self.enabled:
1521
2532
return socketserver.TCPServer.server_activate(self)
2533
1522
2534
def enable(self):
1523
2535
self.enabled = True
1524
def add_pipe(self, parent_pipe):
2536
2537
def add_pipe(self, parent_pipe, proc):
1525
2538
# Call "handle_ipc" for both data and EOF events
1526
gobject.io_add_watch(parent_pipe.fileno(),
1527
gobject.IO_IN | gobject.IO_HUP,
1528
functools.partial(self.handle_ipc,
1529
parent_pipe = parent_pipe))
1530
1531
def handle_ipc(self, source, condition, parent_pipe=None,
2539
GLib.io_add_watch(
2540
parent_pipe.fileno(),
2541
GLib.IO_IN | GLib.IO_HUP,
2542
functools.partial(self.handle_ipc,
2543
parent_pipe = parent_pipe,
2544
proc = proc))
2545
2546
def handle_ipc(self, source, condition,
2547
parent_pipe=None,
2548
proc = None,
1532
2549
client_object=None):
1533
condition_names = {
1534
gobject.IO_IN: "IN", # There is data to read.
1535
gobject.IO_OUT: "OUT", # Data can be written (without
1536
# blocking).
1537
gobject.IO_PRI: "PRI", # There is urgent data to read.
1538
gobject.IO_ERR: "ERR", # Error condition.
1539
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1540
# broken, usually for pipes and
1541
# sockets).
1542
}
1543
conditions_string = ' | '.join(name
1544
for cond, name in
1545
condition_names.iteritems()
1546
if cond & condition)
1547
# error or the other end of multiprocessing.Pipe has closed
1548
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2550
# error, or the other end of multiprocessing.Pipe has closed
2551
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2552
# Wait for other process to exit
2553
proc.join()
1549
2554
return False
1550
2555
1551
2556
# Read a request from the child
1556
2561
fpr = request[1]
1557
2562
address = request[2]
1558
2563
1559
for c in self.clients:
2564
for c in self.clients.values():
1560
2565
if c.fingerprint == fpr:
1561
2566
client = c
1562
2567
break
1563
2568
else:
1564
logger.warning("Client not found for fingerprint: %s, ad"
1565
"dress: %s", fpr, address)
2569
logger.info("Client not found for fingerprint: %s, ad"
2570
"dress: %s", fpr, address)
1566
2571
if self.use_dbus:
1567
2572
# Emit D-Bus signal
1568
mandos_dbus_service.ClientNotFound(fpr, address[0])
2573
mandos_dbus_service.ClientNotFound(fpr,
2574
address[0])
1569
2575
parent_pipe.send(False)
1570
2576
return False
1571
2577
1572
gobject.io_add_watch(parent_pipe.fileno(),
1573
gobject.IO_IN | gobject.IO_HUP,
1574
functools.partial(self.handle_ipc,
1575
parent_pipe = parent_pipe,
1576
client_object = client))
2578
GLib.io_add_watch(
2579
parent_pipe.fileno(),
2580
GLib.IO_IN | GLib.IO_HUP,
2581
functools.partial(self.handle_ipc,
2582
parent_pipe = parent_pipe,
2583
proc = proc,
2584
client_object = client))
1577
2585
parent_pipe.send(True)
1578
# remove the old hook in favor of the new above hook on same fileno
2586
# remove the old hook in favor of the new above hook on
2587
# same fileno
1579
2588
return False
1580
2589
if command == 'funcall':
1581
2590
funcname = request[1]
1582
2591
args = request[2]
1583
2592
kwargs = request[3]
1584
2593
1585
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1586
2594
parent_pipe.send(('data', getattr(client_object,
2595
funcname)(*args,
2596
**kwargs)))
2597
1587
2598
if command == 'getattr':
1588
2599
attrname = request[1]
1589
if callable(client_object.__getattribute__(attrname)):
1590
parent_pipe.send(('function',))
2600
if isinstance(client_object.__getattribute__(attrname),
2601
collections.Callable):
2602
parent_pipe.send(('function', ))
1591
2603
else:
1592
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2604
parent_pipe.send((
2605
'data', client_object.__getattribute__(attrname)))
1593
2606
1594
2607
if command == 'setattr':
1595
2608
attrname = request[1]
1596
2609
value = request[2]
1597
2610
setattr(client_object, attrname, value)
1598
2611
1599
2612
return True
1600
2613
1601
2614
2615
def rfc3339_duration_to_delta(duration):
2616
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2617
2618
>>> rfc3339_duration_to_delta("P7D")
2619
datetime.timedelta(7)
2620
>>> rfc3339_duration_to_delta("PT60S")
2621
datetime.timedelta(0, 60)
2622
>>> rfc3339_duration_to_delta("PT60M")
2623
datetime.timedelta(0, 3600)
2624
>>> rfc3339_duration_to_delta("PT24H")
2625
datetime.timedelta(1)
2626
>>> rfc3339_duration_to_delta("P1W")
2627
datetime.timedelta(7)
2628
>>> rfc3339_duration_to_delta("PT5M30S")
2629
datetime.timedelta(0, 330)
2630
>>> rfc3339_duration_to_delta("P1DT3M20S")
2631
datetime.timedelta(1, 200)
2632
"""
2633
2634
# Parsing an RFC 3339 duration with regular expressions is not
2635
# possible - there would have to be multiple places for the same
2636
# values, like seconds. The current code, while more esoteric, is
2637
# cleaner without depending on a parsing library. If Python had a
2638
# built-in library for parsing we would use it, but we'd like to
2639
# avoid excessive use of external libraries.
2640
2641
# New type for defining tokens, syntax, and semantics all-in-one
2642
Token = collections.namedtuple("Token", (
2643
"regexp", # To match token; if "value" is not None, must have
2644
# a "group" containing digits
2645
"value", # datetime.timedelta or None
2646
"followers")) # Tokens valid after this token
2647
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2648
# the "duration" ABNF definition in RFC 3339, Appendix A.
2649
token_end = Token(re.compile(r"$"), None, frozenset())
2650
token_second = Token(re.compile(r"(\d+)S"),
2651
datetime.timedelta(seconds=1),
2652
frozenset((token_end, )))
2653
token_minute = Token(re.compile(r"(\d+)M"),
2654
datetime.timedelta(minutes=1),
2655
frozenset((token_second, token_end)))
2656
token_hour = Token(re.compile(r"(\d+)H"),
2657
datetime.timedelta(hours=1),
2658
frozenset((token_minute, token_end)))
2659
token_time = Token(re.compile(r"T"),
2660
None,
2661
frozenset((token_hour, token_minute,
2662
token_second)))
2663
token_day = Token(re.compile(r"(\d+)D"),
2664
datetime.timedelta(days=1),
2665
frozenset((token_time, token_end)))
2666
token_month = Token(re.compile(r"(\d+)M"),
2667
datetime.timedelta(weeks=4),
2668
frozenset((token_day, token_end)))
2669
token_year = Token(re.compile(r"(\d+)Y"),
2670
datetime.timedelta(weeks=52),
2671
frozenset((token_month, token_end)))
2672
token_week = Token(re.compile(r"(\d+)W"),
2673
datetime.timedelta(weeks=1),
2674
frozenset((token_end, )))
2675
token_duration = Token(re.compile(r"P"), None,
2676
frozenset((token_year, token_month,
2677
token_day, token_time,
2678
token_week)))
2679
# Define starting values
2680
value = datetime.timedelta() # Value so far
2681
found_token = None
2682
followers = frozenset((token_duration, )) # Following valid tokens
2683
s = duration # String left to parse
2684
# Loop until end token is found
2685
while found_token is not token_end:
2686
# Search for any currently valid tokens
2687
for token in followers:
2688
match = token.regexp.match(s)
2689
if match is not None:
2690
# Token found
2691
if token.value is not None:
2692
# Value found, parse digits
2693
factor = int(match.group(1), 10)
2694
# Add to value so far
2695
value += factor * token.value
2696
# Strip token from string
2697
s = token.regexp.sub("", s, 1)
2698
# Go to found token
2699
found_token = token
2700
# Set valid next tokens
2701
followers = found_token.followers
2702
break
2703
else:
2704
# No currently valid tokens were found
2705
raise ValueError("Invalid RFC 3339 duration: {!r}"
2706
.format(duration))
2707
# End token found
2708
return value
2709
2710
1602
2711
def string_to_delta(interval):
1603
2712
"""Parse a string and return a datetime.timedelta
1604
2713
1615
2724
>>> string_to_delta('5m 30s')
1616
2725
datetime.timedelta(0, 330)
1617
2726
"""
2727
2728
try:
2729
return rfc3339_duration_to_delta(interval)
2730
except ValueError:
2731
pass
2732
1618
2733
timevalue = datetime.timedelta(0)
1619
2734
for s in interval.split():
1620
2735
try:
1621
suffix = unicode(s[-1])
2736
suffix = s[-1]
1622
2737
value = int(s[:-1])
1623
2738
if suffix == "d":
1624
2739
delta = datetime.timedelta(value)
1631
2746
elif suffix == "w":
1632
2747
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1633
2748
else:
1634
raise ValueError("Unknown suffix %r" % suffix)
1635
except (ValueError, IndexError) as e:
2749
raise ValueError("Unknown suffix {!r}".format(suffix))
2750
except IndexError as e:
1636
2751
raise ValueError(*(e.args))
1637
2752
timevalue += delta
1638
2753
return timevalue
1639
2754
1640
2755
1641
def if_nametoindex(interface):
1642
"""Call the C function if_nametoindex(), or equivalent
1643
1644
Note: This function cannot accept a unicode string."""
1645
global if_nametoindex
1646
try:
1647
if_nametoindex = (ctypes.cdll.LoadLibrary
1648
(ctypes.util.find_library("c"))
1649
.if_nametoindex)
1650
except (OSError, AttributeError):
1651
logger.warning("Doing if_nametoindex the hard way")
1652
def if_nametoindex(interface):
1653
"Get an interface index the hard way, i.e. using fcntl()"
1654
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1655
with contextlib.closing(socket.socket()) as s:
1656
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1657
struct.pack(str("16s16x"),
1658
interface))
1659
interface_index = struct.unpack(str("I"),
1660
ifreq[16:20])[0]
1661
return interface_index
1662
return if_nametoindex(interface)
1663
1664
1665
2756
def daemon(nochdir = False, noclose = False):
1666
2757
"""See daemon(3). Standard BSD Unix function.
1667
2758
1675
2766
sys.exit()
1676
2767
if not noclose:
1677
2768
# Close all standard open file descriptors
1678
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2769
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1679
2770
if not stat.S_ISCHR(os.fstat(null).st_mode):
1680
2771
raise OSError(errno.ENODEV,
1681
"%s not a character device"
1682
% os.path.devnull)
2772
"{} not a character device"
2773
.format(os.devnull))
1683
2774
os.dup2(null, sys.stdin.fileno())
1684
2775
os.dup2(null, sys.stdout.fileno())
1685
2776
os.dup2(null, sys.stderr.fileno())
1694
2785
1695
2786
parser = argparse.ArgumentParser()
1696
2787
parser.add_argument("-v", "--version", action="version",
1697
version = "%%(prog)s %s" % version,
2788
version = "%(prog)s {}".format(version),
1698
2789
help="show version number and exit")
1699
2790
parser.add_argument("-i", "--interface", metavar="IF",
1700
2791
help="Bind to interface IF")
1706
2797
help="Run self-test")
1707
2798
parser.add_argument("--debug", action="store_true",
1708
2799
help="Debug mode; run in foreground and log"
1709
" to terminal")
2800
" to terminal", default=None)
1710
2801
parser.add_argument("--debuglevel", metavar="LEVEL",
1711
2802
help="Debug level for stdout output")
1712
2803
parser.add_argument("--priority", help="GnuTLS"
1719
2810
" files")
1720
2811
parser.add_argument("--no-dbus", action="store_false",
1721
2812
dest="use_dbus", help="Do not provide D-Bus"
1722
" system bus interface")
2813
" system bus interface", default=None)
1723
2814
parser.add_argument("--no-ipv6", action="store_false",
1724
dest="use_ipv6", help="Do not use IPv6")
2815
dest="use_ipv6", help="Do not use IPv6",
2816
default=None)
2817
parser.add_argument("--no-restore", action="store_false",
2818
dest="restore", help="Do not restore stored"
2819
" state", default=None)
2820
parser.add_argument("--socket", type=int,
2821
help="Specify a file descriptor to a network"
2822
" socket to use instead of creating one")
2823
parser.add_argument("--statedir", metavar="DIR",
2824
help="Directory to save/restore state in")
2825
parser.add_argument("--foreground", action="store_true",
2826
help="Run in foreground", default=None)
2827
parser.add_argument("--no-zeroconf", action="store_false",
2828
dest="zeroconf", help="Do not use Zeroconf",
2829
default=None)
2830
1725
2831
options = parser.parse_args()
1726
2832
1727
2833
if options.check:
1728
2834
import doctest
1729
doctest.testmod()
1730
sys.exit()
2835
fail_count, test_count = doctest.testmod()
2836
sys.exit(os.EX_OK if fail_count == 0 else 1)
1731
2837
1732
2838
# Default values for config file for server-global settings
1733
2839
server_defaults = { "interface": "",
1735
2841
"port": "",
1736
2842
"debug": "False",
1737
2843
"priority":
1738
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2844
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2845
":+SIGN-DSA-SHA256",
1739
2846
"servicename": "Mandos",
1740
2847
"use_dbus": "True",
1741
2848
"use_ipv6": "True",
1742
2849
"debuglevel": "",
1743
}
2850
"restore": "True",
2851
"socket": "",
2852
"statedir": "/var/lib/mandos",
2853
"foreground": "False",
2854
"zeroconf": "True",
2855
}
1744
2856
1745
2857
# Parse config file for server-global settings
1746
2858
server_config = configparser.SafeConfigParser(server_defaults)
1747
2859
del server_defaults
1748
server_config.read(os.path.join(options.configdir,
1749
"mandos.conf"))
2860
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1750
2861
# Convert the SafeConfigParser object to a dict
1751
2862
server_settings = server_config.defaults()
1752
2863
# Use the appropriate methods on the non-string config options
1753
for option in ("debug", "use_dbus", "use_ipv6"):
2864
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1754
2865
server_settings[option] = server_config.getboolean("DEFAULT",
1755
2866
option)
1756
2867
if server_settings["port"]:
1757
2868
server_settings["port"] = server_config.getint("DEFAULT",
1758
2869
"port")
2870
if server_settings["socket"]:
2871
server_settings["socket"] = server_config.getint("DEFAULT",
2872
"socket")
2873
# Later, stdin will, and stdout and stderr might, be dup'ed
2874
# over with an opened os.devnull. But we don't want this to
2875
# happen with a supplied network socket.
2876
if 0 <= server_settings["socket"] <= 2:
2877
server_settings["socket"] = os.dup(server_settings
2878
["socket"])
1759
2879
del server_config
1760
2880
1761
2881
# Override the settings from the config file with command line
1762
2882
# options, if set.
1763
2883
for option in ("interface", "address", "port", "debug",
1764
"priority", "servicename", "configdir",
1765
"use_dbus", "use_ipv6", "debuglevel"):
2884
"priority", "servicename", "configdir", "use_dbus",
2885
"use_ipv6", "debuglevel", "restore", "statedir",
2886
"socket", "foreground", "zeroconf"):
1766
2887
value = getattr(options, option)
1767
2888
if value is not None:
1768
2889
server_settings[option] = value
1769
2890
del options
1770
2891
# Force all strings to be unicode
1771
2892
for option in server_settings.keys():
1772
if type(server_settings[option]) is str:
1773
server_settings[option] = unicode(server_settings[option])
2893
if isinstance(server_settings[option], bytes):
2894
server_settings[option] = (server_settings[option]
2895
.decode("utf-8"))
2896
# Force all boolean options to be boolean
2897
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2898
"foreground", "zeroconf"):
2899
server_settings[option] = bool(server_settings[option])
2900
# Debug implies foreground
2901
if server_settings["debug"]:
2902
server_settings["foreground"] = True
1774
2903
# Now we have our good server settings in "server_settings"
1775
2904
1776
2905
##################################################################
1777
2906
2907
if (not server_settings["zeroconf"]
2908
and not (server_settings["port"]
2909
or server_settings["socket"] != "")):
2910
parser.error("Needs port or socket to work without Zeroconf")
2911
1778
2912
# For convenience
1779
2913
debug = server_settings["debug"]
1780
2914
debuglevel = server_settings["debuglevel"]
1781
2915
use_dbus = server_settings["use_dbus"]
1782
2916
use_ipv6 = server_settings["use_ipv6"]
1783
2917
stored_state_path = os.path.join(server_settings["statedir"],
2918
stored_state_file)
2919
foreground = server_settings["foreground"]
2920
zeroconf = server_settings["zeroconf"]
2921
2922
if debug:
2923
initlogger(debug, logging.DEBUG)
2924
else:
2925
if not debuglevel:
2926
initlogger(debug)
2927
else:
2928
level = getattr(logging, debuglevel.upper())
2929
initlogger(debug, level)
2930
1784
2931
if server_settings["servicename"] != "Mandos":
1785
syslogger.setFormatter(logging.Formatter
1786
('Mandos (%s) [%%(process)d]:'
1787
' %%(levelname)s: %%(message)s'
1788
% server_settings["servicename"]))
2932
syslogger.setFormatter(
2933
logging.Formatter('Mandos ({}) [%(process)d]:'
2934
' %(levelname)s: %(message)s'.format(
2935
server_settings["servicename"])))
1789
2936
1790
2937
# Parse config file with clients
1791
client_defaults = { "timeout": "1h",
1792
"interval": "5m",
1793
"checker": "fping -q -- %%(host)s",
1794
"host": "",
1795
"approval_delay": "0s",
1796
"approval_duration": "1s",
1797
}
1798
client_config = configparser.SafeConfigParser(client_defaults)
2938
client_config = configparser.SafeConfigParser(Client
2939
.client_defaults)
1799
2940
client_config.read(os.path.join(server_settings["configdir"],
1800
2941
"clients.conf"))
1801
2942
1802
2943
global mandos_dbus_service
1803
2944
mandos_dbus_service = None
1804
2945
1805
tcp_server = MandosServer((server_settings["address"],
1806
server_settings["port"]),
1807
ClientHandler,
1808
interface=(server_settings["interface"]
1809
or None),
1810
use_ipv6=use_ipv6,
1811
gnutls_priority=
1812
server_settings["priority"],
1813
use_dbus=use_dbus)
1814
if not debug:
1815
pidfilename = "/var/run/mandos.pid"
2946
socketfd = None
2947
if server_settings["socket"] != "":
2948
socketfd = server_settings["socket"]
2949
tcp_server = MandosServer(
2950
(server_settings["address"], server_settings["port"]),
2951
ClientHandler,
2952
interface=(server_settings["interface"] or None),
2953
use_ipv6=use_ipv6,
2954
gnutls_priority=server_settings["priority"],
2955
use_dbus=use_dbus,
2956
socketfd=socketfd)
2957
if not foreground:
2958
pidfilename = "/run/mandos.pid"
2959
if not os.path.isdir("/run/."):
2960
pidfilename = "/var/run/mandos.pid"
2961
pidfile = None
1816
2962
try:
1817
pidfile = open(pidfilename, "w")
1818
except IOError:
1819
logger.error("Could not open file %r", pidfilename)
2963
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2964
except IOError as e:
2965
logger.error("Could not open file %r", pidfilename,
2966
exc_info=e)
1820
2967
1821
try:
1822
uid = pwd.getpwnam("_mandos").pw_uid
1823
gid = pwd.getpwnam("_mandos").pw_gid
1824
except KeyError:
2968
for name, group in (("_mandos", "_mandos"),
2969
("mandos", "mandos"),
2970
("nobody", "nogroup")):
1825
2971
try:
1826
uid = pwd.getpwnam("mandos").pw_uid
1827
gid = pwd.getpwnam("mandos").pw_gid
2972
uid = pwd.getpwnam(name).pw_uid
2973
gid = pwd.getpwnam(group).pw_gid
2974
break
1828
2975
except KeyError:
1829
try:
1830
uid = pwd.getpwnam("nobody").pw_uid
1831
gid = pwd.getpwnam("nobody").pw_gid
1832
except KeyError:
1833
uid = 65534
1834
gid = 65534
2976
continue
2977
else:
2978
uid = 65534
2979
gid = 65534
1835
2980
try:
1836
2981
os.setgid(gid)
1837
2982
os.setuid(uid)
2983
if debug:
2984
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2985
gid))
1838
2986
except OSError as error:
1839
if error[0] != errno.EPERM:
1840
raise error
2987
logger.warning("Failed to setuid/setgid to {}:{}: {}"
2988
.format(uid, gid, os.strerror(error.errno)))
2989
if error.errno != errno.EPERM:
2990
raise
1841
2991
1842
if not debug and not debuglevel:
1843
syslogger.setLevel(logging.WARNING)
1844
console.setLevel(logging.WARNING)
1845
if debuglevel:
1846
level = getattr(logging, debuglevel.upper())
1847
syslogger.setLevel(level)
1848
console.setLevel(level)
1849
1850
2992
if debug:
1851
2993
# Enable all possible GnuTLS debugging
1852
2994
1853
2995
# "Use a log level over 10 to enable all debugging options."
1854
2996
# - GnuTLS manual
1855
gnutls.library.functions.gnutls_global_set_log_level(11)
2997
gnutls.global_set_log_level(11)
1856
2998
1857
@gnutls.library.types.gnutls_log_func
2999
@gnutls.log_func
1858
3000
def debug_gnutls(level, string):
1859
3001
logger.debug("GnuTLS: %s", string[:-1])
1860
3002
1861
(gnutls.library.functions
1862
.gnutls_global_set_log_function(debug_gnutls))
3003
gnutls.global_set_log_function(debug_gnutls)
1863
3004
1864
3005
# Redirect stdin so all checkers get /dev/null
1865
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3006
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1866
3007
os.dup2(null, sys.stdin.fileno())
1867
3008
if null > 2:
1868
3009
os.close(null)
1869
else:
1870
# No console logging
1871
logger.removeHandler(console)
1872
3010
1873
3011
# Need to fork before connecting to D-Bus
1874
if not debug:
3012
if not foreground:
1875
3013
# Close all input and output, do double fork, etc.
1876
3014
daemon()
1877
3015
3016
# multiprocessing will use threads, so before we use GLib we need
3017
# to inform GLib that threads will be used.
3018
GLib.threads_init()
3019
1878
3020
global main_loop
1879
3021
# From the Avahi example code
1880
DBusGMainLoop(set_as_default=True )
1881
main_loop = gobject.MainLoop()
3022
DBusGMainLoop(set_as_default=True)
3023
main_loop = GLib.MainLoop()
1882
3024
bus = dbus.SystemBus()
1883
3025
# End of Avahi example code
1884
3026
if use_dbus:
1885
3027
try:
1886
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1887
bus, do_not_queue=True)
1888
except dbus.exceptions.NameExistsException as e:
1889
logger.error(unicode(e) + ", disabling D-Bus")
3028
bus_name = dbus.service.BusName("se.recompile.Mandos",
3029
bus,
3030
do_not_queue=True)
3031
old_bus_name = dbus.service.BusName(
3032
"se.bsnet.fukt.Mandos", bus,
3033
do_not_queue=True)
3034
except dbus.exceptions.DBusException as e:
3035
logger.error("Disabling D-Bus:", exc_info=e)
1890
3036
use_dbus = False
1891
3037
server_settings["use_dbus"] = False
1892
3038
tcp_server.use_dbus = False
1893
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1894
service = AvahiService(name = server_settings["servicename"],
1895
servicetype = "_mandos._tcp",
1896
protocol = protocol, bus = bus)
1897
if server_settings["interface"]:
1898
service.interface = (if_nametoindex
1899
(str(server_settings["interface"])))
3039
if zeroconf:
3040
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3041
service = AvahiServiceToSyslog(
3042
name = server_settings["servicename"],
3043
servicetype = "_mandos._tcp",
3044
protocol = protocol,
3045
bus = bus)
3046
if server_settings["interface"]:
3047
service.interface = if_nametoindex(
3048
server_settings["interface"].encode("utf-8"))
1900
3049
1901
3050
global multiprocessing_manager
1902
3051
multiprocessing_manager = multiprocessing.Manager()
1904
3053
client_class = Client
1905
3054
if use_dbus:
1906
3055
client_class = functools.partial(ClientDBus, bus = bus)
1907
def client_config_items(config, section):
1908
special_settings = {
1909
"approved_by_default":
1910
lambda: config.getboolean(section,
1911
"approved_by_default"),
1912
}
1913
for name, value in config.items(section):
3056
3057
client_settings = Client.config_parser(client_config)
3058
old_client_settings = {}
3059
clients_data = {}
3060
3061
# This is used to redirect stdout and stderr for checker processes
3062
global wnull
3063
wnull = open(os.devnull, "w") # A writable /dev/null
3064
# Only used if server is running in foreground but not in debug
3065
# mode
3066
if debug or not foreground:
3067
wnull.close()
3068
3069
# Get client data and settings from last running state.
3070
if server_settings["restore"]:
3071
try:
3072
with open(stored_state_path, "rb") as stored_state:
3073
if sys.version_info.major == 2:
3074
clients_data, old_client_settings = pickle.load(
3075
stored_state)
3076
else:
3077
bytes_clients_data, bytes_old_client_settings = (
3078
pickle.load(stored_state, encoding = "bytes"))
3079
### Fix bytes to strings
3080
## clients_data
3081
# .keys()
3082
clients_data = { (key.decode("utf-8")
3083
if isinstance(key, bytes)
3084
else key): value
3085
for key, value in
3086
bytes_clients_data.items() }
3087
del bytes_clients_data
3088
for key in clients_data:
3089
value = { (k.decode("utf-8")
3090
if isinstance(k, bytes) else k): v
3091
for k, v in
3092
clients_data[key].items() }
3093
clients_data[key] = value
3094
# .client_structure
3095
value["client_structure"] = [
3096
(s.decode("utf-8")
3097
if isinstance(s, bytes)
3098
else s) for s in
3099
value["client_structure"] ]
3100
# .name & .host
3101
for k in ("name", "host"):
3102
if isinstance(value[k], bytes):
3103
value[k] = value[k].decode("utf-8")
3104
## old_client_settings
3105
# .keys()
3106
old_client_settings = {
3107
(key.decode("utf-8")
3108
if isinstance(key, bytes)
3109
else key): value
3110
for key, value in
3111
bytes_old_client_settings.items() }
3112
del bytes_old_client_settings
3113
# .host
3114
for value in old_client_settings.values():
3115
if isinstance(value["host"], bytes):
3116
value["host"] = (value["host"]
3117
.decode("utf-8"))
3118
os.remove(stored_state_path)
3119
except IOError as e:
3120
if e.errno == errno.ENOENT:
3121
logger.warning("Could not load persistent state:"
3122
" {}".format(os.strerror(e.errno)))
3123
else:
3124
logger.critical("Could not load persistent state:",
3125
exc_info=e)
3126
raise
3127
except EOFError as e:
3128
logger.warning("Could not load persistent state: "
3129
"EOFError:",
3130
exc_info=e)
3131
3132
with PGPEngine() as pgp:
3133
for client_name, client in clients_data.items():
3134
# Skip removed clients
3135
if client_name not in client_settings:
3136
continue
3137
3138
# Decide which value to use after restoring saved state.
3139
# We have three different values: Old config file,
3140
# new config file, and saved state.
3141
# New config value takes precedence if it differs from old
3142
# config value, otherwise use saved state.
3143
for name, value in client_settings[client_name].items():
3144
try:
3145
# For each value in new config, check if it
3146
# differs from the old config value (Except for
3147
# the "secret" attribute)
3148
if (name != "secret"
3149
and (value !=
3150
old_client_settings[client_name][name])):
3151
client[name] = value
3152
except KeyError:
3153
pass
3154
3155
# Clients who has passed its expire date can still be
3156
# enabled if its last checker was successful. A Client
3157
# whose checker succeeded before we stored its state is
3158
# assumed to have successfully run all checkers during
3159
# downtime.
3160
if client["enabled"]:
3161
if datetime.datetime.utcnow() >= client["expires"]:
3162
if not client["last_checked_ok"]:
3163
logger.warning(
3164
"disabling client {} - Client never "
3165
"performed a successful checker".format(
3166
client_name))
3167
client["enabled"] = False
3168
elif client["last_checker_status"] != 0:
3169
logger.warning(
3170
"disabling client {} - Client last"
3171
" checker failed with error code"
3172
" {}".format(
3173
client_name,
3174
client["last_checker_status"]))
3175
client["enabled"] = False
3176
else:
3177
client["expires"] = (
3178
datetime.datetime.utcnow()
3179
+ client["timeout"])
3180
logger.debug("Last checker succeeded,"
3181
" keeping {} enabled".format(
3182
client_name))
1914
3183
try:
1915
yield (name, special_settings[name]())
1916
except KeyError:
1917
yield (name, value)
1918
1919
tcp_server.clients.update(set(
1920
client_class(name = section,
1921
config= dict(client_config_items(
1922
client_config, section)))
1923
for section in client_config.sections()))
3184
client["secret"] = pgp.decrypt(
3185
client["encrypted_secret"],
3186
client_settings[client_name]["secret"])
3187
except PGPError:
3188
# If decryption fails, we use secret from new settings
3189
logger.debug("Failed to decrypt {} old secret".format(
3190
client_name))
3191
client["secret"] = (client_settings[client_name]
3192
["secret"])
3193
3194
# Add/remove clients based on new changes made to config
3195
for client_name in (set(old_client_settings)
3196
- set(client_settings)):
3197
del clients_data[client_name]
3198
for client_name in (set(client_settings)
3199
- set(old_client_settings)):
3200
clients_data[client_name] = client_settings[client_name]
3201
3202
# Create all client objects
3203
for client_name, client in clients_data.items():
3204
tcp_server.clients[client_name] = client_class(
3205
name = client_name,
3206
settings = client,
3207
server_settings = server_settings)
3208
1924
3209
if not tcp_server.clients:
1925
3210
logger.warning("No clients defined")
1926
1927
if not debug:
1928
try:
1929
with pidfile:
1930
pid = os.getpid()
1931
pidfile.write(str(pid) + "\n".encode("utf-8"))
1932
del pidfile
1933
except IOError:
1934
logger.error("Could not write to file %r with PID %d",
1935
pidfilename, pid)
1936
except NameError:
1937
# "pidfile" was never created
1938
pass
3211
3212
if not foreground:
3213
if pidfile is not None:
3214
pid = os.getpid()
3215
try:
3216
with pidfile:
3217
print(pid, file=pidfile)
3218
except IOError:
3219
logger.error("Could not write to file %r with PID %d",
3220
pidfilename, pid)
3221
del pidfile
1939
3222
del pidfilename
3223
3224
for termsig in (signal.SIGHUP, signal.SIGTERM):
3225
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3226
lambda: main_loop.quit() and False)
3227
3228
if use_dbus:
1940
3229
1941
signal.signal(signal.SIGINT, signal.SIG_IGN)
1942
1943
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1944
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1945
1946
if use_dbus:
1947
class MandosDBusService(dbus.service.Object):
3230
@alternate_dbus_interfaces(
3231
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3232
class MandosDBusService(DBusObjectWithObjectManager):
1948
3233
"""A D-Bus proxy object"""
3234
1949
3235
def __init__(self):
1950
3236
dbus.service.Object.__init__(self, bus, "/")
1951
_interface = "se.bsnet.fukt.Mandos"
3237
3238
_interface = "se.recompile.Mandos"
1952
3239
1953
3240
@dbus.service.signal(_interface, signature="o")
1954
3241
def ClientAdded(self, objpath):
1960
3247
"D-Bus signal"
1961
3248
pass
1962
3249
3250
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3251
"true"})
1963
3252
@dbus.service.signal(_interface, signature="os")
1964
3253
def ClientRemoved(self, objpath, name):
1965
3254
"D-Bus signal"
1966
3255
pass
1967
3256
3257
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3258
"true"})
1968
3259
@dbus.service.method(_interface, out_signature="ao")
1969
3260
def GetAllClients(self):
1970
3261
"D-Bus method"
1971
return dbus.Array(c.dbus_object_path
1972
for c in tcp_server.clients)
3262
return dbus.Array(c.dbus_object_path for c in
3263
tcp_server.clients.values())
1973
3264
3265
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3266
"true"})
1974
3267
@dbus.service.method(_interface,
1975
3268
out_signature="a{oa{sv}}")
1976
3269
def GetAllClientsWithProperties(self):
1977
3270
"D-Bus method"
1978
3271
return dbus.Dictionary(
1979
((c.dbus_object_path, c.GetAll(""))
1980
for c in tcp_server.clients),
3272
{ c.dbus_object_path: c.GetAll(
3273
"se.recompile.Mandos.Client")
3274
for c in tcp_server.clients.values() },
1981
3275
signature="oa{sv}")
1982
3276
1983
3277
@dbus.service.method(_interface, in_signature="o")
1984
3278
def RemoveClient(self, object_path):
1985
3279
"D-Bus method"
1986
for c in tcp_server.clients:
3280
for c in tcp_server.clients.values():
1987
3281
if c.dbus_object_path == object_path:
1988
tcp_server.clients.remove(c)
3282
del tcp_server.clients[c.name]
1989
3283
c.remove_from_connection()
1990
# Don't signal anything except ClientRemoved
3284
# Don't signal the disabling
1991
3285
c.disable(quiet=True)
1992
# Emit D-Bus signal
1993
self.ClientRemoved(object_path, c.name)
3286
# Emit D-Bus signal for removal
3287
self.client_removed_signal(c)
1994
3288
return
1995
3289
raise KeyError(object_path)
1996
3290
1997
3291
del _interface
3292
3293
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3294
out_signature = "a{oa{sa{sv}}}")
3295
def GetManagedObjects(self):
3296
"""D-Bus method"""
3297
return dbus.Dictionary(
3298
{ client.dbus_object_path:
3299
dbus.Dictionary(
3300
{ interface: client.GetAll(interface)
3301
for interface in
3302
client._get_all_interface_names()})
3303
for client in tcp_server.clients.values()})
3304
3305
def client_added_signal(self, client):
3306
"""Send the new standard signal and the old signal"""
3307
if use_dbus:
3308
# New standard signal
3309
self.InterfacesAdded(
3310
client.dbus_object_path,
3311
dbus.Dictionary(
3312
{ interface: client.GetAll(interface)
3313
for interface in
3314
client._get_all_interface_names()}))
3315
# Old signal
3316
self.ClientAdded(client.dbus_object_path)
3317
3318
def client_removed_signal(self, client):
3319
"""Send the new standard signal and the old signal"""
3320
if use_dbus:
3321
# New standard signal
3322
self.InterfacesRemoved(
3323
client.dbus_object_path,
3324
client._get_all_interface_names())
3325
# Old signal
3326
self.ClientRemoved(client.dbus_object_path,
3327
client.name)
1998
3328
1999
3329
mandos_dbus_service = MandosDBusService()
2000
3330
3331
# Save modules to variables to exempt the modules from being
3332
# unloaded before the function registered with atexit() is run.
3333
mp = multiprocessing
3334
wn = wnull
2001
3335
def cleanup():
2002
3336
"Cleanup function; run on exit"
2003
service.cleanup()
2004
3337
if zeroconf:
3338
service.cleanup()
3339
3340
mp.active_children()
3341
wn.close()
3342
if not (tcp_server.clients or client_settings):
3343
return
3344
3345
# Store client before exiting. Secrets are encrypted with key
3346
# based on what config file has. If config file is
3347
# removed/edited, old secret will thus be unrecovable.
3348
clients = {}
3349
with PGPEngine() as pgp:
3350
for client in tcp_server.clients.values():
3351
key = client_settings[client.name]["secret"]
3352
client.encrypted_secret = pgp.encrypt(client.secret,
3353
key)
3354
client_dict = {}
3355
3356
# A list of attributes that can not be pickled
3357
# + secret.
3358
exclude = { "bus", "changedstate", "secret",
3359
"checker", "server_settings" }
3360
for name, typ in inspect.getmembers(dbus.service
3361
.Object):
3362
exclude.add(name)
3363
3364
client_dict["encrypted_secret"] = (client
3365
.encrypted_secret)
3366
for attr in client.client_structure:
3367
if attr not in exclude:
3368
client_dict[attr] = getattr(client, attr)
3369
3370
clients[client.name] = client_dict
3371
del client_settings[client.name]["secret"]
3372
3373
try:
3374
with tempfile.NamedTemporaryFile(
3375
mode='wb',
3376
suffix=".pickle",
3377
prefix='clients-',
3378
dir=os.path.dirname(stored_state_path),
3379
delete=False) as stored_state:
3380
pickle.dump((clients, client_settings), stored_state,
3381
protocol = 2)
3382
tempname = stored_state.name
3383
os.rename(tempname, stored_state_path)
3384
except (IOError, OSError) as e:
3385
if not debug:
3386
try:
3387
os.remove(tempname)
3388
except NameError:
3389
pass
3390
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3391
logger.warning("Could not save persistent state: {}"
3392
.format(os.strerror(e.errno)))
3393
else:
3394
logger.warning("Could not save persistent state:",
3395
exc_info=e)
3396
raise
3397
3398
# Delete all clients, and settings from config
2005
3399
while tcp_server.clients:
2006
client = tcp_server.clients.pop()
3400
name, client = tcp_server.clients.popitem()
2007
3401
if use_dbus:
2008
3402
client.remove_from_connection()
2009
client.disable_hook = None
2010
# Don't signal anything except ClientRemoved
3403
# Don't signal the disabling
2011
3404
client.disable(quiet=True)
3405
# Emit D-Bus signal for removal
2012
3406
if use_dbus:
2013
# Emit D-Bus signal
2014
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2015
client.name)
3407
mandos_dbus_service.client_removed_signal(client)
3408
client_settings.clear()
2016
3409
2017
3410
atexit.register(cleanup)
2018
3411
2019
for client in tcp_server.clients:
3412
for client in tcp_server.clients.values():
2020
3413
if use_dbus:
2021
# Emit D-Bus signal
2022
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2023
client.enable()
3414
# Emit D-Bus signal for adding
3415
mandos_dbus_service.client_added_signal(client)
3416
# Need to initiate checking of clients
3417
if client.enabled:
3418
client.init_checker()
2024
3419
2025
3420
tcp_server.enable()
2026
3421
tcp_server.server_activate()
2027
3422
2028
3423
# Find out what port we got
2029
service.port = tcp_server.socket.getsockname()[1]
3424
if zeroconf:
3425
service.port = tcp_server.socket.getsockname()[1]
2030
3426
if use_ipv6:
2031
3427
logger.info("Now listening on address %r, port %d,"
2032
" flowinfo %d, scope_id %d"
2033
% tcp_server.socket.getsockname())
3428
" flowinfo %d, scope_id %d",
3429
*tcp_server.socket.getsockname())
2034
3430
else: # IPv4
2035
logger.info("Now listening on address %r, port %d"
2036
% tcp_server.socket.getsockname())
3431
logger.info("Now listening on address %r, port %d",
3432
*tcp_server.socket.getsockname())
2037
3433
2038
3434
#service.interface = tcp_server.socket.getsockname()[3]
2039
3435
2040
3436
try:
2041
# From the Avahi example code
2042
try:
2043
service.activate()
2044
except dbus.exceptions.DBusException as error:
2045
logger.critical("DBusException: %s", error)
2046
cleanup()
2047
sys.exit(1)
2048
# End of Avahi example code
3437
if zeroconf:
3438
# From the Avahi example code
3439
try:
3440
service.activate()
3441
except dbus.exceptions.DBusException as error:
3442
logger.critical("D-Bus Exception", exc_info=error)
3443
cleanup()
3444
sys.exit(1)
3445
# End of Avahi example code
2049
3446
2050
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2051
lambda *args, **kwargs:
2052
(tcp_server.handle_request
2053
(*args[2:], **kwargs) or True))
3447
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3448
lambda *args, **kwargs:
3449
(tcp_server.handle_request
3450
(*args[2:], **kwargs) or True))
2054
3451
2055
3452
logger.debug("Starting main loop")
2056
3453
main_loop.run()
2057
3454
except AvahiError as error:
2058
logger.critical("AvahiError: %s", error)
3455
logger.critical("Avahi Error", exc_info=error)
2059
3456
cleanup()
2060
3457
sys.exit(1)
2061
3458
except KeyboardInterrupt:
2066
3463
# Must run before the D-Bus bus name gets deregistered
2067
3464
cleanup()
2068
3465
3466
2069
3467
if __name__ == '__main__':
2070
3468
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0