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- Committer: Teddy Hogeborn
- Date: 2018-02-06 20:03:50 UTC
- Revision ID: teddy@recompile.se-20180206200350-jzvorueb731xkph3
Update Debian Debhelper compatibility version.
* (debian/compat): Change to "10".
* (debian/compat): Change to "10".
- files added:
- bugs.xml
- debian/upstream
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
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2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
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# Mandos server - give out binary blobs to connecting clients.
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#
5
#
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6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
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# "AvahiService" class, and some lines in "main".
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#
12
#
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13
# Everything else is
14
# Copyright © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
14
# Copyright © 2008-2017 Teddy Hogeborn
15
# Copyright © 2008-2017 Björn Påhlsson
16
#
17
# This file is part of Mandos.
18
#
19
# Mandos is free software: you can redistribute it and/or modify it
20
# under the terms of the GNU General Public License as published by
19
21
# the Free Software Foundation, either version 3 of the License, or
20
22
# (at your option) any later version.
21
23
#
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
24
26
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
27
# GNU General Public License for more details.
26
#
28
#
27
29
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
31
32
# Contact the authors at <mandos@recompile.se>.
32
#
33
#
33
34
34
35
from __future__ import (division, absolute_import, print_function,
35
36
unicode_literals)
36
37
37
import SocketServer as socketserver
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
38
47
import socket
39
48
import argparse
40
49
import datetime
41
50
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
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
49
55
import sys
50
56
import re
51
57
import os
60
66
import struct
61
67
import fcntl
62
68
import functools
63
import cPickle as pickle
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
64
73
import multiprocessing
65
74
import types
66
75
import binascii
67
76
import tempfile
68
77
import itertools
78
import collections
79
import codecs
69
80
70
81
import dbus
71
82
import dbus.service
72
import gobject
73
import avahi
83
from gi.repository import GLib
74
84
from dbus.mainloop.glib import DBusGMainLoop
75
85
import ctypes
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86
import ctypes.util
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import xml.dom.minidom
78
88
import inspect
79
import GnuPGInterface
80
89
90
# Try to find the value of SO_BINDTODEVICE:
81
91
try:
92
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
93
# newer, and it is also the most natural place for it:
82
94
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
83
95
except AttributeError:
84
96
try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
85
99
from IN import SO_BINDTODEVICE
86
100
except ImportError:
87
SO_BINDTODEVICE = None
88
89
version = "1.5.3"
101
# In Python 2.7 it seems to have been removed entirely.
102
# Try running the C preprocessor:
103
try:
104
cc = subprocess.Popen(["cc", "--language=c", "-E",
105
"/dev/stdin"],
106
stdin=subprocess.PIPE,
107
stdout=subprocess.PIPE)
108
stdout = cc.communicate(
109
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
110
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
111
except (OSError, ValueError, IndexError):
112
# No value found
113
SO_BINDTODEVICE = None
114
115
if sys.version_info.major == 2:
116
str = unicode
117
118
version = "1.7.16"
90
119
stored_state_file = "clients.pickle"
91
120
92
121
logger = logging.getLogger()
93
syslogger = (logging.handlers.SysLogHandler
94
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
95
address = str("/dev/log")))
122
syslogger = None
96
123
97
124
try:
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
100
.if_nametoindex)
125
if_nametoindex = ctypes.cdll.LoadLibrary(
126
ctypes.util.find_library("c")).if_nametoindex
101
127
except (OSError, AttributeError):
128
102
129
def if_nametoindex(interface):
103
130
"Get an interface index the hard way, i.e. using fcntl()"
104
131
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
105
132
with contextlib.closing(socket.socket()) as s:
106
133
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
struct.pack(str("16s16x"),
108
interface))
109
interface_index = struct.unpack(str("I"),
110
ifreq[16:20])[0]
134
struct.pack(b"16s16x", interface))
135
interface_index = struct.unpack("I", ifreq[16:20])[0]
111
136
return interface_index
112
137
113
138
139
def copy_function(func):
140
"""Make a copy of a function"""
141
if sys.version_info.major == 2:
142
return types.FunctionType(func.func_code,
143
func.func_globals,
144
func.func_name,
145
func.func_defaults,
146
func.func_closure)
147
else:
148
return types.FunctionType(func.__code__,
149
func.__globals__,
150
func.__name__,
151
func.__defaults__,
152
func.__closure__)
153
154
114
155
def initlogger(debug, level=logging.WARNING):
115
156
"""init logger and add loglevel"""
116
157
158
global syslogger
159
syslogger = (logging.handlers.SysLogHandler(
160
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
161
address="/dev/log"))
117
162
syslogger.setFormatter(logging.Formatter
118
163
('Mandos [%(process)d]: %(levelname)s:'
119
164
' %(message)s'))
120
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logger.addHandler(syslogger)
121
166
122
167
if debug:
123
168
console = logging.StreamHandler()
124
169
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
136
181
137
182
class PGPEngine(object):
138
183
"""A simple class for OpenPGP symmetric encryption & decryption"""
184
139
185
def __init__(self):
140
self.gnupg = GnuPGInterface.GnuPG()
141
186
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
142
self.gnupg = GnuPGInterface.GnuPG()
143
self.gnupg.options.meta_interactive = False
144
self.gnupg.options.homedir = self.tempdir
145
self.gnupg.options.extra_args.extend(['--force-mdc',
146
'--quiet',
147
'--no-use-agent'])
148
187
self.gpg = "gpg"
188
try:
189
output = subprocess.check_output(["gpgconf"])
190
for line in output.splitlines():
191
name, text, path = line.split(b":")
192
if name == "gpg":
193
self.gpg = path
194
break
195
except OSError as e:
196
if e.errno != errno.ENOENT:
197
raise
198
self.gnupgargs = ['--batch',
199
'--homedir', self.tempdir,
200
'--force-mdc',
201
'--quiet']
202
# Only GPG version 1 has the --no-use-agent option.
203
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
204
self.gnupgargs.append("--no-use-agent")
205
149
206
def __enter__(self):
150
207
return self
151
152
def __exit__ (self, exc_type, exc_value, traceback):
208
209
def __exit__(self, exc_type, exc_value, traceback):
153
210
self._cleanup()
154
211
return False
155
212
156
213
def __del__(self):
157
214
self._cleanup()
158
215
159
216
def _cleanup(self):
160
217
if self.tempdir is not None:
161
218
# Delete contents of tempdir
162
219
for root, dirs, files in os.walk(self.tempdir,
163
topdown = False):
220
topdown=False):
164
221
for filename in files:
165
222
os.remove(os.path.join(root, filename))
166
223
for dirname in dirs:
168
225
# Remove tempdir
169
226
os.rmdir(self.tempdir)
170
227
self.tempdir = None
171
228
172
229
def password_encode(self, password):
173
230
# Passphrase can not be empty and can not contain newlines or
174
231
# NUL bytes. So we prefix it and hex encode it.
175
return b"mandos" + binascii.hexlify(password)
176
232
encoded = b"mandos" + binascii.hexlify(password)
233
if len(encoded) > 2048:
234
# GnuPG can't handle long passwords, so encode differently
235
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
236
.replace(b"\n", b"\\n")
237
.replace(b"\0", b"\\x00"))
238
return encoded
239
177
240
def encrypt(self, data, password):
178
self.gnupg.passphrase = self.password_encode(password)
179
with open(os.devnull, "w") as devnull:
180
try:
181
proc = self.gnupg.run(['--symmetric'],
182
create_fhs=['stdin', 'stdout'],
183
attach_fhs={'stderr': devnull})
184
with contextlib.closing(proc.handles['stdin']) as f:
185
f.write(data)
186
with contextlib.closing(proc.handles['stdout']) as f:
187
ciphertext = f.read()
188
proc.wait()
189
except IOError as e:
190
raise PGPError(e)
191
self.gnupg.passphrase = None
241
passphrase = self.password_encode(password)
242
with tempfile.NamedTemporaryFile(
243
dir=self.tempdir) as passfile:
244
passfile.write(passphrase)
245
passfile.flush()
246
proc = subprocess.Popen([self.gpg, '--symmetric',
247
'--passphrase-file',
248
passfile.name]
249
+ self.gnupgargs,
250
stdin=subprocess.PIPE,
251
stdout=subprocess.PIPE,
252
stderr=subprocess.PIPE)
253
ciphertext, err = proc.communicate(input=data)
254
if proc.returncode != 0:
255
raise PGPError(err)
192
256
return ciphertext
193
257
194
258
def decrypt(self, data, password):
195
self.gnupg.passphrase = self.password_encode(password)
196
with open(os.devnull, "w") as devnull:
197
try:
198
proc = self.gnupg.run(['--decrypt'],
199
create_fhs=['stdin', 'stdout'],
200
attach_fhs={'stderr': devnull})
201
with contextlib.closing(proc.handles['stdin']) as f:
202
f.write(data)
203
with contextlib.closing(proc.handles['stdout']) as f:
204
decrypted_plaintext = f.read()
205
proc.wait()
206
except IOError as e:
207
raise PGPError(e)
208
self.gnupg.passphrase = None
259
passphrase = self.password_encode(password)
260
with tempfile.NamedTemporaryFile(
261
dir=self.tempdir) as passfile:
262
passfile.write(passphrase)
263
passfile.flush()
264
proc = subprocess.Popen([self.gpg, '--decrypt',
265
'--passphrase-file',
266
passfile.name]
267
+ self.gnupgargs,
268
stdin=subprocess.PIPE,
269
stdout=subprocess.PIPE,
270
stderr=subprocess.PIPE)
271
decrypted_plaintext, err = proc.communicate(input=data)
272
if proc.returncode != 0:
273
raise PGPError(err)
209
274
return decrypted_plaintext
210
275
211
276
277
# Pretend that we have an Avahi module
278
class Avahi(object):
279
"""This isn't so much a class as it is a module-like namespace.
280
It is instantiated once, and simulates having an Avahi module."""
281
IF_UNSPEC = -1 # avahi-common/address.h
282
PROTO_UNSPEC = -1 # avahi-common/address.h
283
PROTO_INET = 0 # avahi-common/address.h
284
PROTO_INET6 = 1 # avahi-common/address.h
285
DBUS_NAME = "org.freedesktop.Avahi"
286
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
287
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
288
DBUS_PATH_SERVER = "/"
289
290
def string_array_to_txt_array(self, t):
291
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
for s in t), signature="ay")
293
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
294
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
295
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
296
SERVER_INVALID = 0 # avahi-common/defs.h
297
SERVER_REGISTERING = 1 # avahi-common/defs.h
298
SERVER_RUNNING = 2 # avahi-common/defs.h
299
SERVER_COLLISION = 3 # avahi-common/defs.h
300
SERVER_FAILURE = 4 # avahi-common/defs.h
301
avahi = Avahi()
302
303
212
304
class AvahiError(Exception):
213
305
def __init__(self, value, *args, **kwargs):
214
306
self.value = value
215
super(AvahiError, self).__init__(value, *args, **kwargs)
216
def __unicode__(self):
217
return unicode(repr(self.value))
307
return super(AvahiError, self).__init__(value, *args,
308
**kwargs)
309
218
310
219
311
class AvahiServiceError(AvahiError):
220
312
pass
221
313
314
222
315
class AvahiGroupError(AvahiError):
223
316
pass
224
317
225
318
226
319
class AvahiService(object):
227
320
"""An Avahi (Zeroconf) service.
228
321
229
322
Attributes:
230
323
interface: integer; avahi.IF_UNSPEC or an interface index.
231
324
Used to optionally bind to the specified interface.
232
325
name: string; Example: 'Mandos'
233
326
type: string; Example: '_mandos._tcp'.
234
See <http://www.dns-sd.org/ServiceTypes.html>
327
See <https://www.iana.org/assignments/service-names-port-numbers>
235
328
port: integer; what port to announce
236
329
TXT: list of strings; TXT record for the service
237
330
domain: string; Domain to publish on, default to .local if empty.
243
336
server: D-Bus Server
244
337
bus: dbus.SystemBus()
245
338
"""
246
247
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
248
servicetype = None, port = None, TXT = None,
249
domain = "", host = "", max_renames = 32768,
250
protocol = avahi.PROTO_UNSPEC, bus = None):
339
340
def __init__(self,
341
interface=avahi.IF_UNSPEC,
342
name=None,
343
servicetype=None,
344
port=None,
345
TXT=None,
346
domain="",
347
host="",
348
max_renames=32768,
349
protocol=avahi.PROTO_UNSPEC,
350
bus=None):
251
351
self.interface = interface
252
352
self.name = name
253
353
self.type = servicetype
262
362
self.server = None
263
363
self.bus = bus
264
364
self.entry_group_state_changed_match = None
265
266
def rename(self):
365
366
def rename(self, remove=True):
267
367
"""Derived from the Avahi example code"""
268
368
if self.rename_count >= self.max_renames:
269
369
logger.critical("No suitable Zeroconf service name found"
270
370
" after %i retries, exiting.",
271
371
self.rename_count)
272
372
raise AvahiServiceError("Too many renames")
273
self.name = unicode(self.server
274
.GetAlternativeServiceName(self.name))
373
self.name = str(
374
self.server.GetAlternativeServiceName(self.name))
375
self.rename_count += 1
275
376
logger.info("Changing Zeroconf service name to %r ...",
276
377
self.name)
277
self.remove()
378
if remove:
379
self.remove()
278
380
try:
279
381
self.add()
280
382
except dbus.exceptions.DBusException as error:
281
logger.critical("D-Bus Exception", exc_info=error)
282
self.cleanup()
283
os._exit(1)
284
self.rename_count += 1
285
383
if (error.get_dbus_name()
384
== "org.freedesktop.Avahi.CollisionError"):
385
logger.info("Local Zeroconf service name collision.")
386
return self.rename(remove=False)
387
else:
388
logger.critical("D-Bus Exception", exc_info=error)
389
self.cleanup()
390
os._exit(1)
391
286
392
def remove(self):
287
393
"""Derived from the Avahi example code"""
288
394
if self.entry_group_state_changed_match is not None:
290
396
self.entry_group_state_changed_match = None
291
397
if self.group is not None:
292
398
self.group.Reset()
293
399
294
400
def add(self):
295
401
"""Derived from the Avahi example code"""
296
402
self.remove()
313
419
dbus.UInt16(self.port),
314
420
avahi.string_array_to_txt_array(self.TXT))
315
421
self.group.Commit()
316
422
317
423
def entry_group_state_changed(self, state, error):
318
424
"""Derived from the Avahi example code"""
319
425
logger.debug("Avahi entry group state change: %i", state)
320
426
321
427
if state == avahi.ENTRY_GROUP_ESTABLISHED:
322
428
logger.debug("Zeroconf service established.")
323
429
elif state == avahi.ENTRY_GROUP_COLLISION:
325
431
self.rename()
326
432
elif state == avahi.ENTRY_GROUP_FAILURE:
327
433
logger.critical("Avahi: Error in group state changed %s",
328
unicode(error))
329
raise AvahiGroupError("State changed: {0!s}"
330
.format(error))
331
434
str(error))
435
raise AvahiGroupError("State changed: {!s}".format(error))
436
332
437
def cleanup(self):
333
438
"""Derived from the Avahi example code"""
334
439
if self.group is not None:
339
444
pass
340
445
self.group = None
341
446
self.remove()
342
447
343
448
def server_state_changed(self, state, error=None):
344
449
"""Derived from the Avahi example code"""
345
450
logger.debug("Avahi server state change: %i", state)
346
bad_states = { avahi.SERVER_INVALID:
347
"Zeroconf server invalid",
348
avahi.SERVER_REGISTERING: None,
349
avahi.SERVER_COLLISION:
350
"Zeroconf server name collision",
351
avahi.SERVER_FAILURE:
352
"Zeroconf server failure" }
451
bad_states = {
452
avahi.SERVER_INVALID: "Zeroconf server invalid",
453
avahi.SERVER_REGISTERING: None,
454
avahi.SERVER_COLLISION: "Zeroconf server name collision",
455
avahi.SERVER_FAILURE: "Zeroconf server failure",
456
}
353
457
if state in bad_states:
354
458
if bad_states[state] is not None:
355
459
if error is None:
358
462
logger.error(bad_states[state] + ": %r", error)
359
463
self.cleanup()
360
464
elif state == avahi.SERVER_RUNNING:
361
self.add()
465
try:
466
self.add()
467
except dbus.exceptions.DBusException as error:
468
if (error.get_dbus_name()
469
== "org.freedesktop.Avahi.CollisionError"):
470
logger.info("Local Zeroconf service name"
471
" collision.")
472
return self.rename(remove=False)
473
else:
474
logger.critical("D-Bus Exception", exc_info=error)
475
self.cleanup()
476
os._exit(1)
362
477
else:
363
478
if error is None:
364
479
logger.debug("Unknown state: %r", state)
365
480
else:
366
481
logger.debug("Unknown state: %r: %r", state, error)
367
482
368
483
def activate(self):
369
484
"""Derived from the Avahi example code"""
370
485
if self.server is None:
374
489
follow_name_owner_changes=True),
375
490
avahi.DBUS_INTERFACE_SERVER)
376
491
self.server.connect_to_signal("StateChanged",
377
self.server_state_changed)
492
self.server_state_changed)
378
493
self.server_state_changed(self.server.GetState())
379
494
495
380
496
class AvahiServiceToSyslog(AvahiService):
381
def rename(self):
497
def rename(self, *args, **kwargs):
382
498
"""Add the new name to the syslog messages"""
383
ret = AvahiService.rename(self)
384
syslogger.setFormatter(logging.Formatter
385
('Mandos ({0}) [%(process)d]:'
386
' %(levelname)s: %(message)s'
387
.format(self.name)))
499
ret = super(AvahiServiceToSyslog, self).rename(self, *args,
500
**kwargs)
501
syslogger.setFormatter(logging.Formatter(
502
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
503
.format(self.name)))
388
504
return ret
389
505
390
def timedelta_to_milliseconds(td):
391
"Convert a datetime.timedelta() to milliseconds"
392
return ((td.days * 24 * 60 * 60 * 1000)
393
+ (td.seconds * 1000)
394
+ (td.microseconds // 1000))
506
507
# Pretend that we have a GnuTLS module
508
class GnuTLS(object):
509
"""This isn't so much a class as it is a module-like namespace.
510
It is instantiated once, and simulates having a GnuTLS module."""
511
512
library = ctypes.util.find_library("gnutls")
513
if library is None:
514
library = ctypes.util.find_library("gnutls-deb0")
515
_library = ctypes.cdll.LoadLibrary(library)
516
del library
517
_need_version = b"3.3.0"
518
519
def __init__(self):
520
# Need to use "self" here, since this method is called before
521
# the assignment to the "gnutls" global variable happens.
522
if self.check_version(self._need_version) is None:
523
raise self.Error("Needs GnuTLS {} or later"
524
.format(self._need_version))
525
526
# Unless otherwise indicated, the constants and types below are
527
# all from the gnutls/gnutls.h C header file.
528
529
# Constants
530
E_SUCCESS = 0
531
E_INTERRUPTED = -52
532
E_AGAIN = -28
533
CRT_OPENPGP = 2
534
CLIENT = 2
535
SHUT_RDWR = 0
536
CRD_CERTIFICATE = 1
537
E_NO_CERTIFICATE_FOUND = -49
538
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
539
540
# Types
541
class session_int(ctypes.Structure):
542
_fields_ = []
543
session_t = ctypes.POINTER(session_int)
544
545
class certificate_credentials_st(ctypes.Structure):
546
_fields_ = []
547
certificate_credentials_t = ctypes.POINTER(
548
certificate_credentials_st)
549
certificate_type_t = ctypes.c_int
550
551
class datum_t(ctypes.Structure):
552
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
553
('size', ctypes.c_uint)]
554
555
class openpgp_crt_int(ctypes.Structure):
556
_fields_ = []
557
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
558
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
559
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
560
credentials_type_t = ctypes.c_int
561
transport_ptr_t = ctypes.c_void_p
562
close_request_t = ctypes.c_int
563
564
# Exceptions
565
class Error(Exception):
566
# We need to use the class name "GnuTLS" here, since this
567
# exception might be raised from within GnuTLS.__init__,
568
# which is called before the assignment to the "gnutls"
569
# global variable has happened.
570
def __init__(self, message=None, code=None, args=()):
571
# Default usage is by a message string, but if a return
572
# code is passed, convert it to a string with
573
# gnutls.strerror()
574
self.code = code
575
if message is None and code is not None:
576
message = GnuTLS.strerror(code)
577
return super(GnuTLS.Error, self).__init__(
578
message, *args)
579
580
class CertificateSecurityError(Error):
581
pass
582
583
# Classes
584
class Credentials(object):
585
def __init__(self):
586
self._c_object = gnutls.certificate_credentials_t()
587
gnutls.certificate_allocate_credentials(
588
ctypes.byref(self._c_object))
589
self.type = gnutls.CRD_CERTIFICATE
590
591
def __del__(self):
592
gnutls.certificate_free_credentials(self._c_object)
593
594
class ClientSession(object):
595
def __init__(self, socket, credentials=None):
596
self._c_object = gnutls.session_t()
597
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
598
gnutls.set_default_priority(self._c_object)
599
gnutls.transport_set_ptr(self._c_object, socket.fileno())
600
gnutls.handshake_set_private_extensions(self._c_object,
601
True)
602
self.socket = socket
603
if credentials is None:
604
credentials = gnutls.Credentials()
605
gnutls.credentials_set(self._c_object, credentials.type,
606
ctypes.cast(credentials._c_object,
607
ctypes.c_void_p))
608
self.credentials = credentials
609
610
def __del__(self):
611
gnutls.deinit(self._c_object)
612
613
def handshake(self):
614
return gnutls.handshake(self._c_object)
615
616
def send(self, data):
617
data = bytes(data)
618
data_len = len(data)
619
while data_len > 0:
620
data_len -= gnutls.record_send(self._c_object,
621
data[-data_len:],
622
data_len)
623
624
def bye(self):
625
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
626
627
# Error handling functions
628
def _error_code(result):
629
"""A function to raise exceptions on errors, suitable
630
for the 'restype' attribute on ctypes functions"""
631
if result >= 0:
632
return result
633
if result == gnutls.E_NO_CERTIFICATE_FOUND:
634
raise gnutls.CertificateSecurityError(code=result)
635
raise gnutls.Error(code=result)
636
637
def _retry_on_error(result, func, arguments):
638
"""A function to retry on some errors, suitable
639
for the 'errcheck' attribute on ctypes functions"""
640
while result < 0:
641
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
642
return _error_code(result)
643
result = func(*arguments)
644
return result
645
646
# Unless otherwise indicated, the function declarations below are
647
# all from the gnutls/gnutls.h C header file.
648
649
# Functions
650
priority_set_direct = _library.gnutls_priority_set_direct
651
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
652
ctypes.POINTER(ctypes.c_char_p)]
653
priority_set_direct.restype = _error_code
654
655
init = _library.gnutls_init
656
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
657
init.restype = _error_code
658
659
set_default_priority = _library.gnutls_set_default_priority
660
set_default_priority.argtypes = [session_t]
661
set_default_priority.restype = _error_code
662
663
record_send = _library.gnutls_record_send
664
record_send.argtypes = [session_t, ctypes.c_void_p,
665
ctypes.c_size_t]
666
record_send.restype = ctypes.c_ssize_t
667
record_send.errcheck = _retry_on_error
668
669
certificate_allocate_credentials = (
670
_library.gnutls_certificate_allocate_credentials)
671
certificate_allocate_credentials.argtypes = [
672
ctypes.POINTER(certificate_credentials_t)]
673
certificate_allocate_credentials.restype = _error_code
674
675
certificate_free_credentials = (
676
_library.gnutls_certificate_free_credentials)
677
certificate_free_credentials.argtypes = [
678
certificate_credentials_t]
679
certificate_free_credentials.restype = None
680
681
handshake_set_private_extensions = (
682
_library.gnutls_handshake_set_private_extensions)
683
handshake_set_private_extensions.argtypes = [session_t,
684
ctypes.c_int]
685
handshake_set_private_extensions.restype = None
686
687
credentials_set = _library.gnutls_credentials_set
688
credentials_set.argtypes = [session_t, credentials_type_t,
689
ctypes.c_void_p]
690
credentials_set.restype = _error_code
691
692
strerror = _library.gnutls_strerror
693
strerror.argtypes = [ctypes.c_int]
694
strerror.restype = ctypes.c_char_p
695
696
certificate_type_get = _library.gnutls_certificate_type_get
697
certificate_type_get.argtypes = [session_t]
698
certificate_type_get.restype = _error_code
699
700
certificate_get_peers = _library.gnutls_certificate_get_peers
701
certificate_get_peers.argtypes = [session_t,
702
ctypes.POINTER(ctypes.c_uint)]
703
certificate_get_peers.restype = ctypes.POINTER(datum_t)
704
705
global_set_log_level = _library.gnutls_global_set_log_level
706
global_set_log_level.argtypes = [ctypes.c_int]
707
global_set_log_level.restype = None
708
709
global_set_log_function = _library.gnutls_global_set_log_function
710
global_set_log_function.argtypes = [log_func]
711
global_set_log_function.restype = None
712
713
deinit = _library.gnutls_deinit
714
deinit.argtypes = [session_t]
715
deinit.restype = None
716
717
handshake = _library.gnutls_handshake
718
handshake.argtypes = [session_t]
719
handshake.restype = _error_code
720
handshake.errcheck = _retry_on_error
721
722
transport_set_ptr = _library.gnutls_transport_set_ptr
723
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
724
transport_set_ptr.restype = None
725
726
bye = _library.gnutls_bye
727
bye.argtypes = [session_t, close_request_t]
728
bye.restype = _error_code
729
bye.errcheck = _retry_on_error
730
731
check_version = _library.gnutls_check_version
732
check_version.argtypes = [ctypes.c_char_p]
733
check_version.restype = ctypes.c_char_p
734
735
# All the function declarations below are from gnutls/openpgp.h
736
737
openpgp_crt_init = _library.gnutls_openpgp_crt_init
738
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
739
openpgp_crt_init.restype = _error_code
740
741
openpgp_crt_import = _library.gnutls_openpgp_crt_import
742
openpgp_crt_import.argtypes = [openpgp_crt_t,
743
ctypes.POINTER(datum_t),
744
openpgp_crt_fmt_t]
745
openpgp_crt_import.restype = _error_code
746
747
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
748
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
749
ctypes.POINTER(ctypes.c_uint)]
750
openpgp_crt_verify_self.restype = _error_code
751
752
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
753
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
754
openpgp_crt_deinit.restype = None
755
756
openpgp_crt_get_fingerprint = (
757
_library.gnutls_openpgp_crt_get_fingerprint)
758
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
759
ctypes.c_void_p,
760
ctypes.POINTER(
761
ctypes.c_size_t)]
762
openpgp_crt_get_fingerprint.restype = _error_code
763
764
# Remove non-public functions
765
del _error_code, _retry_on_error
766
# Create the global "gnutls" object, simulating a module
767
gnutls = GnuTLS()
768
769
770
def call_pipe(connection, # : multiprocessing.Connection
771
func, *args, **kwargs):
772
"""This function is meant to be called by multiprocessing.Process
773
774
This function runs func(*args, **kwargs), and writes the resulting
775
return value on the provided multiprocessing.Connection.
776
"""
777
connection.send(func(*args, **kwargs))
778
connection.close()
779
395
780
396
781
class Client(object):
397
782
"""A representation of a client host served by this server.
398
783
399
784
Attributes:
400
785
approved: bool(); 'None' if not yet approved/disapproved
401
786
approval_delay: datetime.timedelta(); Time to wait for approval
403
788
checker: subprocess.Popen(); a running checker process used
404
789
to see if the client lives.
405
790
'None' if no process is running.
406
checker_callback_tag: a gobject event source tag, or None
791
checker_callback_tag: a GLib event source tag, or None
407
792
checker_command: string; External command which is run to check
408
793
if client lives. %() expansions are done at
409
794
runtime with vars(self) as dict, so that for
410
795
instance %(name)s can be used in the command.
411
checker_initiator_tag: a gobject event source tag, or None
796
checker_initiator_tag: a GLib event source tag, or None
412
797
created: datetime.datetime(); (UTC) object creation
413
798
client_structure: Object describing what attributes a client has
414
799
and is used for storing the client at exit
415
800
current_checker_command: string; current running checker_command
416
disable_initiator_tag: a gobject event source tag, or None
801
disable_initiator_tag: a GLib event source tag, or None
417
802
enabled: bool()
418
803
fingerprint: string (40 or 32 hexadecimal digits); used to
419
804
uniquely identify the client
424
809
last_checker_status: integer between 0 and 255 reflecting exit
425
810
status of last checker. -1 reflects crashed
426
811
checker, -2 means no checker completed yet.
812
last_checker_signal: The signal which killed the last checker, if
813
last_checker_status is -1
427
814
last_enabled: datetime.datetime(); (UTC) or None
428
815
name: string; from the config file, used in log messages and
429
816
D-Bus identifiers
434
821
runtime_expansions: Allowed attributes for runtime expansion.
435
822
expires: datetime.datetime(); time (UTC) when a client will be
436
823
disabled, or None
824
server_settings: The server_settings dict from main()
437
825
"""
438
826
439
827
runtime_expansions = ("approval_delay", "approval_duration",
440
"created", "enabled", "fingerprint",
441
"host", "interval", "last_checked_ok",
828
"created", "enabled", "expires",
829
"fingerprint", "host", "interval",
830
"last_approval_request", "last_checked_ok",
442
831
"last_enabled", "name", "timeout")
443
client_defaults = { "timeout": "5m",
444
"extended_timeout": "15m",
445
"interval": "2m",
446
"checker": "fping -q -- %%(host)s",
447
"host": "",
448
"approval_delay": "0s",
449
"approval_duration": "1s",
450
"approved_by_default": "True",
451
"enabled": "True",
452
}
453
454
def timeout_milliseconds(self):
455
"Return the 'timeout' attribute in milliseconds"
456
return timedelta_to_milliseconds(self.timeout)
457
458
def extended_timeout_milliseconds(self):
459
"Return the 'extended_timeout' attribute in milliseconds"
460
return timedelta_to_milliseconds(self.extended_timeout)
461
462
def interval_milliseconds(self):
463
"Return the 'interval' attribute in milliseconds"
464
return timedelta_to_milliseconds(self.interval)
465
466
def approval_delay_milliseconds(self):
467
return timedelta_to_milliseconds(self.approval_delay)
468
832
client_defaults = {
833
"timeout": "PT5M",
834
"extended_timeout": "PT15M",
835
"interval": "PT2M",
836
"checker": "fping -q -- %%(host)s",
837
"host": "",
838
"approval_delay": "PT0S",
839
"approval_duration": "PT1S",
840
"approved_by_default": "True",
841
"enabled": "True",
842
}
843
469
844
@staticmethod
470
845
def config_parser(config):
471
846
"""Construct a new dict of client settings of this form:
478
853
for client_name in config.sections():
479
854
section = dict(config.items(client_name))
480
855
client = settings[client_name] = {}
481
856
482
857
client["host"] = section["host"]
483
858
# Reformat values from string types to Python types
484
859
client["approved_by_default"] = config.getboolean(
485
860
client_name, "approved_by_default")
486
861
client["enabled"] = config.getboolean(client_name,
487
862
"enabled")
488
863
864
# Uppercase and remove spaces from fingerprint for later
865
# comparison purposes with return value from the
866
# fingerprint() function
489
867
client["fingerprint"] = (section["fingerprint"].upper()
490
868
.replace(" ", ""))
491
869
if "secret" in section:
492
client["secret"] = section["secret"].decode("base64")
870
client["secret"] = codecs.decode(section["secret"]
871
.encode("utf-8"),
872
"base64")
493
873
elif "secfile" in section:
494
874
with open(os.path.expanduser(os.path.expandvars
495
875
(section["secfile"])),
496
876
"rb") as secfile:
497
877
client["secret"] = secfile.read()
498
878
else:
499
raise TypeError("No secret or secfile for section {0}"
879
raise TypeError("No secret or secfile for section {}"
500
880
.format(section))
501
881
client["timeout"] = string_to_delta(section["timeout"])
502
882
client["extended_timeout"] = string_to_delta(
510
890
client["last_approval_request"] = None
511
891
client["last_checked_ok"] = None
512
892
client["last_checker_status"] = -2
513
893
514
894
return settings
515
516
def __init__(self, settings, name = None):
895
896
def __init__(self, settings, name=None, server_settings=None):
517
897
self.name = name
898
if server_settings is None:
899
server_settings = {}
900
self.server_settings = server_settings
518
901
# adding all client settings
519
for setting, value in settings.iteritems():
902
for setting, value in settings.items():
520
903
setattr(self, setting, value)
521
904
522
905
if self.enabled:
523
906
if not hasattr(self, "last_enabled"):
524
907
self.last_enabled = datetime.datetime.utcnow()
528
911
else:
529
912
self.last_enabled = None
530
913
self.expires = None
531
914
532
915
logger.debug("Creating client %r", self.name)
533
# Uppercase and remove spaces from fingerprint for later
534
# comparison purposes with return value from the fingerprint()
535
# function
536
916
logger.debug(" Fingerprint: %s", self.fingerprint)
537
917
self.created = settings.get("created",
538
918
datetime.datetime.utcnow())
539
919
540
920
# attributes specific for this server instance
541
921
self.checker = None
542
922
self.checker_initiator_tag = None
545
925
self.current_checker_command = None
546
926
self.approved = None
547
927
self.approvals_pending = 0
548
self.changedstate = (multiprocessing_manager
549
.Condition(multiprocessing_manager
550
.Lock()))
551
self.client_structure = [attr for attr in
552
self.__dict__.iterkeys()
928
self.changedstate = multiprocessing_manager.Condition(
929
multiprocessing_manager.Lock())
930
self.client_structure = [attr
931
for attr in self.__dict__.keys()
553
932
if not attr.startswith("_")]
554
933
self.client_structure.append("client_structure")
555
556
for name, t in inspect.getmembers(type(self),
557
lambda obj:
558
isinstance(obj,
559
property)):
934
935
for name, t in inspect.getmembers(
936
type(self), lambda obj: isinstance(obj, property)):
560
937
if not name.startswith("_"):
561
938
self.client_structure.append(name)
562
939
563
940
# Send notice to process children that client state has changed
564
941
def send_changedstate(self):
565
942
with self.changedstate:
566
943
self.changedstate.notify_all()
567
944
568
945
def enable(self):
569
946
"""Start this client's checker and timeout hooks"""
570
947
if getattr(self, "enabled", False):
571
948
# Already enabled
572
949
return
573
self.send_changedstate()
574
950
self.expires = datetime.datetime.utcnow() + self.timeout
575
951
self.enabled = True
576
952
self.last_enabled = datetime.datetime.utcnow()
577
953
self.init_checker()
578
954
self.send_changedstate()
955
579
956
def disable(self, quiet=True):
580
957
"""Disable this client."""
581
958
if not getattr(self, "enabled", False):
582
959
return False
583
960
if not quiet:
584
self.send_changedstate()
585
if not quiet:
586
961
logger.info("Disabling client %s", self.name)
587
if getattr(self, "disable_initiator_tag", False):
588
gobject.source_remove(self.disable_initiator_tag)
962
if getattr(self, "disable_initiator_tag", None) is not None:
963
GLib.source_remove(self.disable_initiator_tag)
589
964
self.disable_initiator_tag = None
590
965
self.expires = None
591
if getattr(self, "checker_initiator_tag", False):
592
gobject.source_remove(self.checker_initiator_tag)
966
if getattr(self, "checker_initiator_tag", None) is not None:
967
GLib.source_remove(self.checker_initiator_tag)
593
968
self.checker_initiator_tag = None
594
969
self.stop_checker()
595
970
self.enabled = False
596
# Do not run this again if called by a gobject.timeout_add
971
if not quiet:
972
self.send_changedstate()
973
# Do not run this again if called by a GLib.timeout_add
597
974
return False
598
975
599
976
def __del__(self):
600
977
self.disable()
601
978
602
979
def init_checker(self):
603
980
# Schedule a new checker to be started an 'interval' from now,
604
981
# and every interval from then on.
605
self.checker_initiator_tag = (gobject.timeout_add
606
(self.interval_milliseconds(),
607
self.start_checker))
982
if self.checker_initiator_tag is not None:
983
GLib.source_remove(self.checker_initiator_tag)
984
self.checker_initiator_tag = GLib.timeout_add(
985
int(self.interval.total_seconds() * 1000),
986
self.start_checker)
608
987
# Schedule a disable() when 'timeout' has passed
609
self.disable_initiator_tag = (gobject.timeout_add
610
(self.timeout_milliseconds(),
611
self.disable))
988
if self.disable_initiator_tag is not None:
989
GLib.source_remove(self.disable_initiator_tag)
990
self.disable_initiator_tag = GLib.timeout_add(
991
int(self.timeout.total_seconds() * 1000), self.disable)
612
992
# Also start a new checker *right now*.
613
993
self.start_checker()
614
615
def checker_callback(self, pid, condition, command):
994
995
def checker_callback(self, source, condition, connection,
996
command):
616
997
"""The checker has completed, so take appropriate actions."""
617
998
self.checker_callback_tag = None
618
999
self.checker = None
619
if os.WIFEXITED(condition):
620
self.last_checker_status = os.WEXITSTATUS(condition)
1000
# Read return code from connection (see call_pipe)
1001
returncode = connection.recv()
1002
connection.close()
1003
1004
if returncode >= 0:
1005
self.last_checker_status = returncode
1006
self.last_checker_signal = None
621
1007
if self.last_checker_status == 0:
622
1008
logger.info("Checker for %(name)s succeeded",
623
1009
vars(self))
624
1010
self.checked_ok()
625
1011
else:
626
logger.info("Checker for %(name)s failed",
627
vars(self))
1012
logger.info("Checker for %(name)s failed", vars(self))
628
1013
else:
629
1014
self.last_checker_status = -1
1015
self.last_checker_signal = -returncode
630
1016
logger.warning("Checker for %(name)s crashed?",
631
1017
vars(self))
632
1018
return False
1019
633
1020
def checked_ok(self):
634
1021
"""Assert that the client has been seen, alive and well."""
635
1022
self.last_checked_ok = datetime.datetime.utcnow()
636
1023
self.last_checker_status = 0
1024
self.last_checker_signal = None
637
1025
self.bump_timeout()
638
1026
639
1027
def bump_timeout(self, timeout=None):
640
1028
"""Bump up the timeout for this client."""
641
1029
if timeout is None:
642
1030
timeout = self.timeout
643
1031
if self.disable_initiator_tag is not None:
644
gobject.source_remove(self.disable_initiator_tag)
1032
GLib.source_remove(self.disable_initiator_tag)
1033
self.disable_initiator_tag = None
645
1034
if getattr(self, "enabled", False):
646
self.disable_initiator_tag = (gobject.timeout_add
647
(timedelta_to_milliseconds
648
(timeout), self.disable))
1035
self.disable_initiator_tag = GLib.timeout_add(
1036
int(timeout.total_seconds() * 1000), self.disable)
649
1037
self.expires = datetime.datetime.utcnow() + timeout
650
1038
651
1039
def need_approval(self):
652
1040
self.last_approval_request = datetime.datetime.utcnow()
653
1041
654
1042
def start_checker(self):
655
1043
"""Start a new checker subprocess if one is not running.
656
1044
657
1045
If a checker already exists, leave it running and do
658
1046
nothing."""
659
1047
# The reason for not killing a running checker is that if we
660
# did that, then if a checker (for some reason) started
661
# running slowly and taking more than 'interval' time, the
662
# client would inevitably timeout, since no checker would get
663
# a chance to run to completion. If we instead leave running
1048
# did that, and if a checker (for some reason) started running
1049
# slowly and taking more than 'interval' time, then the client
1050
# would inevitably timeout, since no checker would get a
1051
# chance to run to completion. If we instead leave running
664
1052
# checkers alone, the checker would have to take more time
665
1053
# than 'timeout' for the client to be disabled, which is as it
666
1054
# should be.
667
668
# If a checker exists, make sure it is not a zombie
669
try:
670
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
671
except (AttributeError, OSError) as error:
672
if (isinstance(error, OSError)
673
and error.errno != errno.ECHILD):
674
raise error
675
else:
676
if pid:
677
logger.warning("Checker was a zombie")
678
gobject.source_remove(self.checker_callback_tag)
679
self.checker_callback(pid, status,
680
self.current_checker_command)
1055
1056
if self.checker is not None and not self.checker.is_alive():
1057
logger.warning("Checker was not alive; joining")
1058
self.checker.join()
1059
self.checker = None
681
1060
# Start a new checker if needed
682
1061
if self.checker is None:
1062
# Escape attributes for the shell
1063
escaped_attrs = {
1064
attr: re.escape(str(getattr(self, attr)))
1065
for attr in self.runtime_expansions}
683
1066
try:
684
# In case checker_command has exactly one % operator
685
command = self.checker_command % self.host
686
except TypeError:
687
# Escape attributes for the shell
688
escaped_attrs = dict(
689
(attr,
690
re.escape(unicode(str(getattr(self, attr, "")),
691
errors=
692
'replace')))
693
for attr in
694
self.runtime_expansions)
695
696
try:
697
command = self.checker_command % escaped_attrs
698
except TypeError as error:
699
logger.error('Could not format string "%s"',
700
self.checker_command, exc_info=error)
701
return True # Try again later
1067
command = self.checker_command % escaped_attrs
1068
except TypeError as error:
1069
logger.error('Could not format string "%s"',
1070
self.checker_command,
1071
exc_info=error)
1072
return True # Try again later
702
1073
self.current_checker_command = command
703
try:
704
logger.info("Starting checker %r for %s",
705
command, self.name)
706
# We don't need to redirect stdout and stderr, since
707
# in normal mode, that is already done by daemon(),
708
# and in debug mode we don't want to. (Stdin is
709
# always replaced by /dev/null.)
710
self.checker = subprocess.Popen(command,
711
close_fds=True,
712
shell=True, cwd="/")
713
self.checker_callback_tag = (gobject.child_watch_add
714
(self.checker.pid,
715
self.checker_callback,
716
data=command))
717
# The checker may have completed before the gobject
718
# watch was added. Check for this.
719
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
720
if pid:
721
gobject.source_remove(self.checker_callback_tag)
722
self.checker_callback(pid, status, command)
723
except OSError as error:
724
logger.error("Failed to start subprocess",
725
exc_info=error)
726
# Re-run this periodically if run by gobject.timeout_add
1074
logger.info("Starting checker %r for %s", command,
1075
self.name)
1076
# We don't need to redirect stdout and stderr, since
1077
# in normal mode, that is already done by daemon(),
1078
# and in debug mode we don't want to. (Stdin is
1079
# always replaced by /dev/null.)
1080
# The exception is when not debugging but nevertheless
1081
# running in the foreground; use the previously
1082
# created wnull.
1083
popen_args = {"close_fds": True,
1084
"shell": True,
1085
"cwd": "/"}
1086
if (not self.server_settings["debug"]
1087
and self.server_settings["foreground"]):
1088
popen_args.update({"stdout": wnull,
1089
"stderr": wnull})
1090
pipe = multiprocessing.Pipe(duplex=False)
1091
self.checker = multiprocessing.Process(
1092
target=call_pipe,
1093
args=(pipe[1], subprocess.call, command),
1094
kwargs=popen_args)
1095
self.checker.start()
1096
self.checker_callback_tag = GLib.io_add_watch(
1097
pipe[0].fileno(), GLib.IO_IN,
1098
self.checker_callback, pipe[0], command)
1099
# Re-run this periodically if run by GLib.timeout_add
727
1100
return True
728
1101
729
1102
def stop_checker(self):
730
1103
"""Force the checker process, if any, to stop."""
731
1104
if self.checker_callback_tag:
732
gobject.source_remove(self.checker_callback_tag)
1105
GLib.source_remove(self.checker_callback_tag)
733
1106
self.checker_callback_tag = None
734
1107
if getattr(self, "checker", None) is None:
735
1108
return
736
1109
logger.debug("Stopping checker for %(name)s", vars(self))
737
try:
738
self.checker.terminate()
739
#time.sleep(0.5)
740
#if self.checker.poll() is None:
741
# self.checker.kill()
742
except OSError as error:
743
if error.errno != errno.ESRCH: # No such process
744
raise
1110
self.checker.terminate()
745
1111
self.checker = None
746
1112
747
1113
748
def dbus_service_property(dbus_interface, signature="v",
749
access="readwrite", byte_arrays=False):
1114
def dbus_service_property(dbus_interface,
1115
signature="v",
1116
access="readwrite",
1117
byte_arrays=False):
750
1118
"""Decorators for marking methods of a DBusObjectWithProperties to
751
1119
become properties on the D-Bus.
752
1120
753
1121
The decorated method will be called with no arguments by "Get"
754
1122
and with one argument by "Set".
755
1123
756
1124
The parameters, where they are supported, are the same as
757
1125
dbus.service.method, except there is only "signature", since the
758
1126
type from Get() and the type sent to Set() is the same.
761
1129
# "Set" method, so we fail early here:
762
1130
if byte_arrays and signature != "ay":
763
1131
raise ValueError("Byte arrays not supported for non-'ay'"
764
" signature {0!r}".format(signature))
1132
" signature {!r}".format(signature))
1133
765
1134
def decorator(func):
766
1135
func._dbus_is_property = True
767
1136
func._dbus_interface = dbus_interface
770
1139
func._dbus_name = func.__name__
771
1140
if func._dbus_name.endswith("_dbus_property"):
772
1141
func._dbus_name = func._dbus_name[:-14]
773
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
1142
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
774
1143
return func
1144
775
1145
return decorator
776
1146
777
1147
778
1148
def dbus_interface_annotations(dbus_interface):
779
1149
"""Decorator for marking functions returning interface annotations
780
1150
781
1151
Usage:
782
1152
783
1153
@dbus_interface_annotations("org.example.Interface")
784
1154
def _foo(self): # Function name does not matter
785
1155
return {"org.freedesktop.DBus.Deprecated": "true",
786
1156
"org.freedesktop.DBus.Property.EmitsChangedSignal":
787
1157
"false"}
788
1158
"""
1159
789
1160
def decorator(func):
790
1161
func._dbus_is_interface = True
791
1162
func._dbus_interface = dbus_interface
792
1163
func._dbus_name = dbus_interface
793
1164
return func
1165
794
1166
return decorator
795
1167
796
1168
797
1169
def dbus_annotations(annotations):
798
1170
"""Decorator to annotate D-Bus methods, signals or properties
799
1171
Usage:
800
1172
1173
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1174
"org.freedesktop.DBus.Property."
1175
"EmitsChangedSignal": "false"})
801
1176
@dbus_service_property("org.example.Interface", signature="b",
802
1177
access="r")
803
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
804
"org.freedesktop.DBus.Property."
805
"EmitsChangedSignal": "false"})
806
1178
def Property_dbus_property(self):
807
1179
return dbus.Boolean(False)
1180
1181
See also the DBusObjectWithAnnotations class.
808
1182
"""
1183
809
1184
def decorator(func):
810
1185
func._dbus_annotations = annotations
811
1186
return func
1187
812
1188
return decorator
813
1189
814
1190
815
1191
class DBusPropertyException(dbus.exceptions.DBusException):
816
1192
"""A base class for D-Bus property-related exceptions
817
1193
"""
818
def __unicode__(self):
819
return unicode(str(self))
1194
pass
820
1195
821
1196
822
1197
class DBusPropertyAccessException(DBusPropertyException):
831
1206
pass
832
1207
833
1208
834
class DBusObjectWithProperties(dbus.service.Object):
835
"""A D-Bus object with properties.
836
837
Classes inheriting from this can use the dbus_service_property
838
decorator to expose methods as D-Bus properties. It exposes the
839
standard Get(), Set(), and GetAll() methods on the D-Bus.
1209
class DBusObjectWithAnnotations(dbus.service.Object):
1210
"""A D-Bus object with annotations.
1211
1212
Classes inheriting from this can use the dbus_annotations
1213
decorator to add annotations to methods or signals.
840
1214
"""
841
1215
842
1216
@staticmethod
843
1217
def _is_dbus_thing(thing):
844
1218
"""Returns a function testing if an attribute is a D-Bus thing
845
1219
846
1220
If called like _is_dbus_thing("method") it returns a function
847
1221
suitable for use as predicate to inspect.getmembers().
848
1222
"""
849
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
1223
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
850
1224
False)
851
1225
852
1226
def _get_all_dbus_things(self, thing):
853
1227
"""Returns a generator of (name, attribute) pairs
854
1228
"""
855
return ((getattr(athing.__get__(self), "_dbus_name",
856
name),
1229
return ((getattr(athing.__get__(self), "_dbus_name", name),
857
1230
athing.__get__(self))
858
1231
for cls in self.__class__.__mro__
859
1232
for name, athing in
860
inspect.getmembers(cls,
861
self._is_dbus_thing(thing)))
862
1233
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1234
1235
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1236
out_signature="s",
1237
path_keyword='object_path',
1238
connection_keyword='connection')
1239
def Introspect(self, object_path, connection):
1240
"""Overloading of standard D-Bus method.
1241
1242
Inserts annotation tags on methods and signals.
1243
"""
1244
xmlstring = dbus.service.Object.Introspect(self, object_path,
1245
connection)
1246
try:
1247
document = xml.dom.minidom.parseString(xmlstring)
1248
1249
for if_tag in document.getElementsByTagName("interface"):
1250
# Add annotation tags
1251
for typ in ("method", "signal"):
1252
for tag in if_tag.getElementsByTagName(typ):
1253
annots = dict()
1254
for name, prop in (self.
1255
_get_all_dbus_things(typ)):
1256
if (name == tag.getAttribute("name")
1257
and prop._dbus_interface
1258
== if_tag.getAttribute("name")):
1259
annots.update(getattr(
1260
prop, "_dbus_annotations", {}))
1261
for name, value in annots.items():
1262
ann_tag = document.createElement(
1263
"annotation")
1264
ann_tag.setAttribute("name", name)
1265
ann_tag.setAttribute("value", value)
1266
tag.appendChild(ann_tag)
1267
# Add interface annotation tags
1268
for annotation, value in dict(
1269
itertools.chain.from_iterable(
1270
annotations().items()
1271
for name, annotations
1272
in self._get_all_dbus_things("interface")
1273
if name == if_tag.getAttribute("name")
1274
)).items():
1275
ann_tag = document.createElement("annotation")
1276
ann_tag.setAttribute("name", annotation)
1277
ann_tag.setAttribute("value", value)
1278
if_tag.appendChild(ann_tag)
1279
# Fix argument name for the Introspect method itself
1280
if (if_tag.getAttribute("name")
1281
== dbus.INTROSPECTABLE_IFACE):
1282
for cn in if_tag.getElementsByTagName("method"):
1283
if cn.getAttribute("name") == "Introspect":
1284
for arg in cn.getElementsByTagName("arg"):
1285
if (arg.getAttribute("direction")
1286
== "out"):
1287
arg.setAttribute("name",
1288
"xml_data")
1289
xmlstring = document.toxml("utf-8")
1290
document.unlink()
1291
except (AttributeError, xml.dom.DOMException,
1292
xml.parsers.expat.ExpatError) as error:
1293
logger.error("Failed to override Introspection method",
1294
exc_info=error)
1295
return xmlstring
1296
1297
1298
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1299
"""A D-Bus object with properties.
1300
1301
Classes inheriting from this can use the dbus_service_property
1302
decorator to expose methods as D-Bus properties. It exposes the
1303
standard Get(), Set(), and GetAll() methods on the D-Bus.
1304
"""
1305
863
1306
def _get_dbus_property(self, interface_name, property_name):
864
1307
"""Returns a bound method if one exists which is a D-Bus
865
1308
property with the specified name and interface.
866
1309
"""
867
for cls in self.__class__.__mro__:
868
for name, value in (inspect.getmembers
869
(cls,
870
self._is_dbus_thing("property"))):
1310
for cls in self.__class__.__mro__:
1311
for name, value in inspect.getmembers(
1312
cls, self._is_dbus_thing("property")):
871
1313
if (value._dbus_name == property_name
872
1314
and value._dbus_interface == interface_name):
873
1315
return value.__get__(self)
874
1316
875
1317
# No such property
876
raise DBusPropertyNotFound(self.dbus_object_path + ":"
877
+ interface_name + "."
878
+ property_name)
879
880
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1318
raise DBusPropertyNotFound("{}:{}.{}".format(
1319
self.dbus_object_path, interface_name, property_name))
1320
1321
@classmethod
1322
def _get_all_interface_names(cls):
1323
"""Get a sequence of all interfaces supported by an object"""
1324
return (name for name in set(getattr(getattr(x, attr),
1325
"_dbus_interface", None)
1326
for x in (inspect.getmro(cls))
1327
for attr in dir(x))
1328
if name is not None)
1329
1330
@dbus.service.method(dbus.PROPERTIES_IFACE,
1331
in_signature="ss",
881
1332
out_signature="v")
882
1333
def Get(self, interface_name, property_name):
883
1334
"""Standard D-Bus property Get() method, see D-Bus standard.
889
1340
if not hasattr(value, "variant_level"):
890
1341
return value
891
1342
return type(value)(value, variant_level=value.variant_level+1)
892
1343
893
1344
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
894
1345
def Set(self, interface_name, property_name, value):
895
1346
"""Standard D-Bus property Set() method, see D-Bus standard.
901
1352
# The byte_arrays option is not supported yet on
902
1353
# signatures other than "ay".
903
1354
if prop._dbus_signature != "ay":
904
raise ValueError
1355
raise ValueError("Byte arrays not supported for non-"
1356
"'ay' signature {!r}"
1357
.format(prop._dbus_signature))
905
1358
value = dbus.ByteArray(b''.join(chr(byte)
906
1359
for byte in value))
907
1360
prop(value)
908
909
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1361
1362
@dbus.service.method(dbus.PROPERTIES_IFACE,
1363
in_signature="s",
910
1364
out_signature="a{sv}")
911
1365
def GetAll(self, interface_name):
912
1366
"""Standard D-Bus property GetAll() method, see D-Bus
913
1367
standard.
914
1368
915
1369
Note: Will not include properties with access="write".
916
1370
"""
917
1371
properties = {}
927
1381
if not hasattr(value, "variant_level"):
928
1382
properties[name] = value
929
1383
continue
930
properties[name] = type(value)(value, variant_level=
931
value.variant_level+1)
1384
properties[name] = type(value)(
1385
value, variant_level=value.variant_level + 1)
932
1386
return dbus.Dictionary(properties, signature="sv")
933
1387
1388
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1389
def PropertiesChanged(self, interface_name, changed_properties,
1390
invalidated_properties):
1391
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1392
standard.
1393
"""
1394
pass
1395
934
1396
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
935
1397
out_signature="s",
936
1398
path_keyword='object_path',
937
1399
connection_keyword='connection')
938
1400
def Introspect(self, object_path, connection):
939
1401
"""Overloading of standard D-Bus method.
940
1402
941
1403
Inserts property tags and interface annotation tags.
942
1404
"""
943
xmlstring = dbus.service.Object.Introspect(self, object_path,
944
connection)
1405
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1406
object_path,
1407
connection)
945
1408
try:
946
1409
document = xml.dom.minidom.parseString(xmlstring)
1410
947
1411
def make_tag(document, name, prop):
948
1412
e = document.createElement("property")
949
1413
e.setAttribute("name", name)
950
1414
e.setAttribute("type", prop._dbus_signature)
951
1415
e.setAttribute("access", prop._dbus_access)
952
1416
return e
1417
953
1418
for if_tag in document.getElementsByTagName("interface"):
954
1419
# Add property tags
955
1420
for tag in (make_tag(document, name, prop)
958
1423
if prop._dbus_interface
959
1424
== if_tag.getAttribute("name")):
960
1425
if_tag.appendChild(tag)
961
# Add annotation tags
962
for typ in ("method", "signal", "property"):
963
for tag in if_tag.getElementsByTagName(typ):
964
annots = dict()
965
for name, prop in (self.
966
_get_all_dbus_things(typ)):
967
if (name == tag.getAttribute("name")
968
and prop._dbus_interface
969
== if_tag.getAttribute("name")):
970
annots.update(getattr
971
(prop,
972
"_dbus_annotations",
973
{}))
974
for name, value in annots.iteritems():
975
ann_tag = document.createElement(
976
"annotation")
977
ann_tag.setAttribute("name", name)
978
ann_tag.setAttribute("value", value)
979
tag.appendChild(ann_tag)
980
# Add interface annotation tags
981
for annotation, value in dict(
982
itertools.chain(
983
*(annotations().iteritems()
984
for name, annotations in
985
self._get_all_dbus_things("interface")
986
if name == if_tag.getAttribute("name")
987
))).iteritems():
988
ann_tag = document.createElement("annotation")
989
ann_tag.setAttribute("name", annotation)
990
ann_tag.setAttribute("value", value)
991
if_tag.appendChild(ann_tag)
1426
# Add annotation tags for properties
1427
for tag in if_tag.getElementsByTagName("property"):
1428
annots = dict()
1429
for name, prop in self._get_all_dbus_things(
1430
"property"):
1431
if (name == tag.getAttribute("name")
1432
and prop._dbus_interface
1433
== if_tag.getAttribute("name")):
1434
annots.update(getattr(
1435
prop, "_dbus_annotations", {}))
1436
for name, value in annots.items():
1437
ann_tag = document.createElement(
1438
"annotation")
1439
ann_tag.setAttribute("name", name)
1440
ann_tag.setAttribute("value", value)
1441
tag.appendChild(ann_tag)
992
1442
# Add the names to the return values for the
993
1443
# "org.freedesktop.DBus.Properties" methods
994
1444
if (if_tag.getAttribute("name")
1013
1463
return xmlstring
1014
1464
1015
1465
1016
def datetime_to_dbus (dt, variant_level=0):
1466
try:
1467
dbus.OBJECT_MANAGER_IFACE
1468
except AttributeError:
1469
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1470
1471
1472
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1473
"""A D-Bus object with an ObjectManager.
1474
1475
Classes inheriting from this exposes the standard
1476
GetManagedObjects call and the InterfacesAdded and
1477
InterfacesRemoved signals on the standard
1478
"org.freedesktop.DBus.ObjectManager" interface.
1479
1480
Note: No signals are sent automatically; they must be sent
1481
manually.
1482
"""
1483
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1484
out_signature="a{oa{sa{sv}}}")
1485
def GetManagedObjects(self):
1486
"""This function must be overridden"""
1487
raise NotImplementedError()
1488
1489
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1490
signature="oa{sa{sv}}")
1491
def InterfacesAdded(self, object_path, interfaces_and_properties):
1492
pass
1493
1494
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1495
def InterfacesRemoved(self, object_path, interfaces):
1496
pass
1497
1498
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1499
out_signature="s",
1500
path_keyword='object_path',
1501
connection_keyword='connection')
1502
def Introspect(self, object_path, connection):
1503
"""Overloading of standard D-Bus method.
1504
1505
Override return argument name of GetManagedObjects to be
1506
"objpath_interfaces_and_properties"
1507
"""
1508
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1509
object_path,
1510
connection)
1511
try:
1512
document = xml.dom.minidom.parseString(xmlstring)
1513
1514
for if_tag in document.getElementsByTagName("interface"):
1515
# Fix argument name for the GetManagedObjects method
1516
if (if_tag.getAttribute("name")
1517
== dbus.OBJECT_MANAGER_IFACE):
1518
for cn in if_tag.getElementsByTagName("method"):
1519
if (cn.getAttribute("name")
1520
== "GetManagedObjects"):
1521
for arg in cn.getElementsByTagName("arg"):
1522
if (arg.getAttribute("direction")
1523
== "out"):
1524
arg.setAttribute(
1525
"name",
1526
"objpath_interfaces"
1527
"_and_properties")
1528
xmlstring = document.toxml("utf-8")
1529
document.unlink()
1530
except (AttributeError, xml.dom.DOMException,
1531
xml.parsers.expat.ExpatError) as error:
1532
logger.error("Failed to override Introspection method",
1533
exc_info=error)
1534
return xmlstring
1535
1536
1537
def datetime_to_dbus(dt, variant_level=0):
1017
1538
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1018
1539
if dt is None:
1019
return dbus.String("", variant_level = variant_level)
1020
return dbus.String(dt.isoformat(),
1021
variant_level=variant_level)
1022
1023
1024
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
1025
.__metaclass__):
1026
"""Applied to an empty subclass of a D-Bus object, this metaclass
1027
will add additional D-Bus attributes matching a certain pattern.
1540
return dbus.String("", variant_level=variant_level)
1541
return dbus.String(dt.isoformat(), variant_level=variant_level)
1542
1543
1544
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1545
"""A class decorator; applied to a subclass of
1546
dbus.service.Object, it will add alternate D-Bus attributes with
1547
interface names according to the "alt_interface_names" mapping.
1548
Usage:
1549
1550
@alternate_dbus_interfaces({"org.example.Interface":
1551
"net.example.AlternateInterface"})
1552
class SampleDBusObject(dbus.service.Object):
1553
@dbus.service.method("org.example.Interface")
1554
def SampleDBusMethod():
1555
pass
1556
1557
The above "SampleDBusMethod" on "SampleDBusObject" will be
1558
reachable via two interfaces: "org.example.Interface" and
1559
"net.example.AlternateInterface", the latter of which will have
1560
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1561
"true", unless "deprecate" is passed with a False value.
1562
1563
This works for methods and signals, and also for D-Bus properties
1564
(from DBusObjectWithProperties) and interfaces (from the
1565
dbus_interface_annotations decorator).
1028
1566
"""
1029
def __new__(mcs, name, bases, attr):
1030
# Go through all the base classes which could have D-Bus
1031
# methods, signals, or properties in them
1032
old_interface_names = []
1033
for base in (b for b in bases
1034
if issubclass(b, dbus.service.Object)):
1035
# Go though all attributes of the base class
1036
for attrname, attribute in inspect.getmembers(base):
1567
1568
def wrapper(cls):
1569
for orig_interface_name, alt_interface_name in (
1570
alt_interface_names.items()):
1571
attr = {}
1572
interface_names = set()
1573
# Go though all attributes of the class
1574
for attrname, attribute in inspect.getmembers(cls):
1037
1575
# Ignore non-D-Bus attributes, and D-Bus attributes
1038
1576
# with the wrong interface name
1039
1577
if (not hasattr(attribute, "_dbus_interface")
1040
or not attribute._dbus_interface
1041
.startswith("se.recompile.Mandos")):
1578
or not attribute._dbus_interface.startswith(
1579
orig_interface_name)):
1042
1580
continue
1043
1581
# Create an alternate D-Bus interface name based on
1044
1582
# the current name
1045
alt_interface = (attribute._dbus_interface
1046
.replace("se.recompile.Mandos",
1047
"se.bsnet.fukt.Mandos"))
1048
if alt_interface != attribute._dbus_interface:
1049
old_interface_names.append(alt_interface)
1583
alt_interface = attribute._dbus_interface.replace(
1584
orig_interface_name, alt_interface_name)
1585
interface_names.add(alt_interface)
1050
1586
# Is this a D-Bus signal?
1051
1587
if getattr(attribute, "_dbus_is_signal", False):
1052
# Extract the original non-method function by
1053
# black magic
1054
nonmethod_func = (dict(
1588
# Extract the original non-method undecorated
1589
# function by black magic
1590
if sys.version_info.major == 2:
1591
nonmethod_func = (dict(
1055
1592
zip(attribute.func_code.co_freevars,
1056
attribute.__closure__))["func"]
1057
.cell_contents)
1593
attribute.__closure__))
1594
["func"].cell_contents)
1595
else:
1596
nonmethod_func = (dict(
1597
zip(attribute.__code__.co_freevars,
1598
attribute.__closure__))
1599
["func"].cell_contents)
1058
1600
# Create a new, but exactly alike, function
1059
1601
# object, and decorate it to be a new D-Bus signal
1060
1602
# with the alternate D-Bus interface name
1061
new_function = (dbus.service.signal
1062
(alt_interface,
1063
attribute._dbus_signature)
1064
(types.FunctionType(
1065
nonmethod_func.func_code,
1066
nonmethod_func.func_globals,
1067
nonmethod_func.func_name,
1068
nonmethod_func.func_defaults,
1069
nonmethod_func.func_closure)))
1603
new_function = copy_function(nonmethod_func)
1604
new_function = (dbus.service.signal(
1605
alt_interface,
1606
attribute._dbus_signature)(new_function))
1070
1607
# Copy annotations, if any
1071
1608
try:
1072
new_function._dbus_annotations = (
1073
dict(attribute._dbus_annotations))
1609
new_function._dbus_annotations = dict(
1610
attribute._dbus_annotations)
1074
1611
except AttributeError:
1075
1612
pass
1613
1076
1614
# Define a creator of a function to call both the
1077
# old and new functions, so both the old and new
1078
# signals gets sent when the function is called
1615
# original and alternate functions, so both the
1616
# original and alternate signals gets sent when
1617
# the function is called
1079
1618
def fixscope(func1, func2):
1080
1619
"""This function is a scope container to pass
1081
1620
func1 and func2 to the "call_both" function
1082
1621
outside of its arguments"""
1622
1623
@functools.wraps(func2)
1083
1624
def call_both(*args, **kwargs):
1084
1625
"""This function will emit two D-Bus
1085
1626
signals by calling func1 and func2"""
1086
1627
func1(*args, **kwargs)
1087
1628
func2(*args, **kwargs)
1629
# Make wrapper function look like a D-Bus
1630
# signal
1631
for name, attr in inspect.getmembers(func2):
1632
if name.startswith("_dbus_"):
1633
setattr(call_both, name, attr)
1634
1088
1635
return call_both
1089
1636
# Create the "call_both" function and add it to
1090
1637
# the class
1091
attr[attrname] = fixscope(attribute,
1092
new_function)
1638
attr[attrname] = fixscope(attribute, new_function)
1093
1639
# Is this a D-Bus method?
1094
1640
elif getattr(attribute, "_dbus_is_method", False):
1095
1641
# Create a new, but exactly alike, function
1096
1642
# object. Decorate it to be a new D-Bus method
1097
1643
# with the alternate D-Bus interface name. Add it
1098
1644
# to the class.
1099
attr[attrname] = (dbus.service.method
1100
(alt_interface,
1101
attribute._dbus_in_signature,
1102
attribute._dbus_out_signature)
1103
(types.FunctionType
1104
(attribute.func_code,
1105
attribute.func_globals,
1106
attribute.func_name,
1107
attribute.func_defaults,
1108
attribute.func_closure)))
1645
attr[attrname] = (
1646
dbus.service.method(
1647
alt_interface,
1648
attribute._dbus_in_signature,
1649
attribute._dbus_out_signature)
1650
(copy_function(attribute)))
1109
1651
# Copy annotations, if any
1110
1652
try:
1111
attr[attrname]._dbus_annotations = (
1112
dict(attribute._dbus_annotations))
1653
attr[attrname]._dbus_annotations = dict(
1654
attribute._dbus_annotations)
1113
1655
except AttributeError:
1114
1656
pass
1115
1657
# Is this a D-Bus property?
1118
1660
# object, and decorate it to be a new D-Bus
1119
1661
# property with the alternate D-Bus interface
1120
1662
# name. Add it to the class.
1121
attr[attrname] = (dbus_service_property
1122
(alt_interface,
1123
attribute._dbus_signature,
1124
attribute._dbus_access,
1125
attribute
1126
._dbus_get_args_options
1127
["byte_arrays"])
1128
(types.FunctionType
1129
(attribute.func_code,
1130
attribute.func_globals,
1131
attribute.func_name,
1132
attribute.func_defaults,
1133
attribute.func_closure)))
1663
attr[attrname] = (dbus_service_property(
1664
alt_interface, attribute._dbus_signature,
1665
attribute._dbus_access,
1666
attribute._dbus_get_args_options
1667
["byte_arrays"])
1668
(copy_function(attribute)))
1134
1669
# Copy annotations, if any
1135
1670
try:
1136
attr[attrname]._dbus_annotations = (
1137
dict(attribute._dbus_annotations))
1671
attr[attrname]._dbus_annotations = dict(
1672
attribute._dbus_annotations)
1138
1673
except AttributeError:
1139
1674
pass
1140
1675
# Is this a D-Bus interface?
1143
1678
# object. Decorate it to be a new D-Bus interface
1144
1679
# with the alternate D-Bus interface name. Add it
1145
1680
# to the class.
1146
attr[attrname] = (dbus_interface_annotations
1147
(alt_interface)
1148
(types.FunctionType
1149
(attribute.func_code,
1150
attribute.func_globals,
1151
attribute.func_name,
1152
attribute.func_defaults,
1153
attribute.func_closure)))
1154
# Deprecate all old interfaces
1155
iname="_AlternateDBusNamesMetaclass_interface_annotation{0}"
1156
for old_interface_name in old_interface_names:
1157
@dbus_interface_annotations(old_interface_name)
1158
def func(self):
1159
return { "org.freedesktop.DBus.Deprecated": "true" }
1160
# Find an unused name
1161
for aname in (iname.format(i) for i in itertools.count()):
1162
if aname not in attr:
1163
attr[aname] = func
1164
break
1165
return type.__new__(mcs, name, bases, attr)
1166
1167
1681
attr[attrname] = (
1682
dbus_interface_annotations(alt_interface)
1683
(copy_function(attribute)))
1684
if deprecate:
1685
# Deprecate all alternate interfaces
1686
iname = "_AlternateDBusNames_interface_annotation{}"
1687
for interface_name in interface_names:
1688
1689
@dbus_interface_annotations(interface_name)
1690
def func(self):
1691
return {"org.freedesktop.DBus.Deprecated":
1692
"true"}
1693
# Find an unused name
1694
for aname in (iname.format(i)
1695
for i in itertools.count()):
1696
if aname not in attr:
1697
attr[aname] = func
1698
break
1699
if interface_names:
1700
# Replace the class with a new subclass of it with
1701
# methods, signals, etc. as created above.
1702
if sys.version_info.major == 2:
1703
cls = type(b"{}Alternate".format(cls.__name__),
1704
(cls, ), attr)
1705
else:
1706
cls = type("{}Alternate".format(cls.__name__),
1707
(cls, ), attr)
1708
return cls
1709
1710
return wrapper
1711
1712
1713
@alternate_dbus_interfaces({"se.recompile.Mandos":
1714
"se.bsnet.fukt.Mandos"})
1168
1715
class ClientDBus(Client, DBusObjectWithProperties):
1169
1716
"""A Client class using D-Bus
1170
1717
1171
1718
Attributes:
1172
1719
dbus_object_path: dbus.ObjectPath
1173
1720
bus: dbus.SystemBus()
1174
1721
"""
1175
1722
1176
1723
runtime_expansions = (Client.runtime_expansions
1177
+ ("dbus_object_path",))
1178
1724
+ ("dbus_object_path", ))
1725
1726
_interface = "se.recompile.Mandos.Client"
1727
1179
1728
# dbus.service.Object doesn't use super(), so we can't either.
1180
1181
def __init__(self, bus = None, *args, **kwargs):
1729
1730
def __init__(self, bus=None, *args, **kwargs):
1182
1731
self.bus = bus
1183
1732
Client.__init__(self, *args, **kwargs)
1184
1733
# Only now, when this client is initialized, can it show up on
1185
1734
# the D-Bus
1186
client_object_name = unicode(self.name).translate(
1735
client_object_name = str(self.name).translate(
1187
1736
{ord("."): ord("_"),
1188
1737
ord("-"): ord("_")})
1189
self.dbus_object_path = (dbus.ObjectPath
1190
("/clients/" + client_object_name))
1738
self.dbus_object_path = dbus.ObjectPath(
1739
"/clients/" + client_object_name)
1191
1740
DBusObjectWithProperties.__init__(self, self.bus,
1192
1741
self.dbus_object_path)
1193
1194
def notifychangeproperty(transform_func,
1195
dbus_name, type_func=lambda x: x,
1196
variant_level=1):
1742
1743
def notifychangeproperty(transform_func, dbus_name,
1744
type_func=lambda x: x,
1745
variant_level=1,
1746
invalidate_only=False,
1747
_interface=_interface):
1197
1748
""" Modify a variable so that it's a property which announces
1198
1749
its changes to DBus.
1199
1750
1200
1751
transform_fun: Function that takes a value and a variant_level
1201
1752
and transforms it to a D-Bus type.
1202
1753
dbus_name: D-Bus name of the variable
1204
1755
to the D-Bus. Default: no transform
1205
1756
variant_level: D-Bus variant level. Default: 1
1206
1757
"""
1207
attrname = "_{0}".format(dbus_name)
1758
attrname = "_{}".format(dbus_name)
1759
1208
1760
def setter(self, value):
1209
1761
if hasattr(self, "dbus_object_path"):
1210
1762
if (not hasattr(self, attrname) or
1211
1763
type_func(getattr(self, attrname, None))
1212
1764
!= type_func(value)):
1213
dbus_value = transform_func(type_func(value),
1214
variant_level
1215
=variant_level)
1216
self.PropertyChanged(dbus.String(dbus_name),
1217
dbus_value)
1765
if invalidate_only:
1766
self.PropertiesChanged(
1767
_interface, dbus.Dictionary(),
1768
dbus.Array((dbus_name, )))
1769
else:
1770
dbus_value = transform_func(
1771
type_func(value),
1772
variant_level=variant_level)
1773
self.PropertyChanged(dbus.String(dbus_name),
1774
dbus_value)
1775
self.PropertiesChanged(
1776
_interface,
1777
dbus.Dictionary({dbus.String(dbus_name):
1778
dbus_value}),
1779
dbus.Array())
1218
1780
setattr(self, attrname, value)
1219
1781
1220
1782
return property(lambda self: getattr(self, attrname), setter)
1221
1783
1222
1784
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1223
1785
approvals_pending = notifychangeproperty(dbus.Boolean,
1224
1786
"ApprovalPending",
1225
type_func = bool)
1787
type_func=bool)
1226
1788
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1227
1789
last_enabled = notifychangeproperty(datetime_to_dbus,
1228
1790
"LastEnabled")
1229
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1230
type_func = lambda checker:
1231
checker is not None)
1791
checker = notifychangeproperty(
1792
dbus.Boolean, "CheckerRunning",
1793
type_func=lambda checker: checker is not None)
1232
1794
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1233
1795
"LastCheckedOK")
1234
1796
last_checker_status = notifychangeproperty(dbus.Int16,
1237
1799
datetime_to_dbus, "LastApprovalRequest")
1238
1800
approved_by_default = notifychangeproperty(dbus.Boolean,
1239
1801
"ApprovedByDefault")
1240
approval_delay = notifychangeproperty(dbus.UInt64,
1241
"ApprovalDelay",
1242
type_func =
1243
timedelta_to_milliseconds)
1802
approval_delay = notifychangeproperty(
1803
dbus.UInt64, "ApprovalDelay",
1804
type_func=lambda td: td.total_seconds() * 1000)
1244
1805
approval_duration = notifychangeproperty(
1245
1806
dbus.UInt64, "ApprovalDuration",
1246
type_func = timedelta_to_milliseconds)
1807
type_func=lambda td: td.total_seconds() * 1000)
1247
1808
host = notifychangeproperty(dbus.String, "Host")
1248
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1249
type_func =
1250
timedelta_to_milliseconds)
1809
timeout = notifychangeproperty(
1810
dbus.UInt64, "Timeout",
1811
type_func=lambda td: td.total_seconds() * 1000)
1251
1812
extended_timeout = notifychangeproperty(
1252
1813
dbus.UInt64, "ExtendedTimeout",
1253
type_func = timedelta_to_milliseconds)
1254
interval = notifychangeproperty(dbus.UInt64,
1255
"Interval",
1256
type_func =
1257
timedelta_to_milliseconds)
1814
type_func=lambda td: td.total_seconds() * 1000)
1815
interval = notifychangeproperty(
1816
dbus.UInt64, "Interval",
1817
type_func=lambda td: td.total_seconds() * 1000)
1258
1818
checker_command = notifychangeproperty(dbus.String, "Checker")
1259
1819
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1820
invalidate_only=True)
1821
1260
1822
del notifychangeproperty
1261
1823
1262
1824
def __del__(self, *args, **kwargs):
1263
1825
try:
1264
1826
self.remove_from_connection()
1267
1829
if hasattr(DBusObjectWithProperties, "__del__"):
1268
1830
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1269
1831
Client.__del__(self, *args, **kwargs)
1270
1271
def checker_callback(self, pid, condition, command,
1272
*args, **kwargs):
1273
self.checker_callback_tag = None
1274
self.checker = None
1275
if os.WIFEXITED(condition):
1276
exitstatus = os.WEXITSTATUS(condition)
1832
1833
def checker_callback(self, source, condition,
1834
connection, command, *args, **kwargs):
1835
ret = Client.checker_callback(self, source, condition,
1836
connection, command, *args,
1837
**kwargs)
1838
exitstatus = self.last_checker_status
1839
if exitstatus >= 0:
1277
1840
# Emit D-Bus signal
1278
1841
self.CheckerCompleted(dbus.Int16(exitstatus),
1279
dbus.Int64(condition),
1842
# This is specific to GNU libC
1843
dbus.Int64(exitstatus << 8),
1280
1844
dbus.String(command))
1281
1845
else:
1282
1846
# Emit D-Bus signal
1283
1847
self.CheckerCompleted(dbus.Int16(-1),
1284
dbus.Int64(condition),
1848
dbus.Int64(
1849
# This is specific to GNU libC
1850
(exitstatus << 8)
1851
| self.last_checker_signal),
1285
1852
dbus.String(command))
1286
1287
return Client.checker_callback(self, pid, condition, command,
1288
*args, **kwargs)
1289
1853
return ret
1854
1290
1855
def start_checker(self, *args, **kwargs):
1291
old_checker = self.checker
1292
if self.checker is not None:
1293
old_checker_pid = self.checker.pid
1294
else:
1295
old_checker_pid = None
1856
old_checker_pid = getattr(self.checker, "pid", None)
1296
1857
r = Client.start_checker(self, *args, **kwargs)
1297
1858
# Only if new checker process was started
1298
1859
if (self.checker is not None
1300
1861
# Emit D-Bus signal
1301
1862
self.CheckerStarted(self.current_checker_command)
1302
1863
return r
1303
1864
1304
1865
def _reset_approved(self):
1305
1866
self.approved = None
1306
1867
return False
1307
1868
1308
1869
def approve(self, value=True):
1309
self.send_changedstate()
1310
1870
self.approved = value
1311
gobject.timeout_add(timedelta_to_milliseconds
1312
(self.approval_duration),
1313
self._reset_approved)
1314
1315
## D-Bus methods, signals & properties
1316
_interface = "se.recompile.Mandos.Client"
1317
1318
## Interfaces
1319
1320
@dbus_interface_annotations(_interface)
1321
def _foo(self):
1322
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1323
"false"}
1324
1325
## Signals
1326
1871
GLib.timeout_add(int(self.approval_duration.total_seconds()
1872
* 1000), self._reset_approved)
1873
self.send_changedstate()
1874
1875
# D-Bus methods, signals & properties
1876
1877
# Interfaces
1878
1879
# Signals
1880
1327
1881
# CheckerCompleted - signal
1328
1882
@dbus.service.signal(_interface, signature="nxs")
1329
1883
def CheckerCompleted(self, exitcode, waitstatus, command):
1330
1884
"D-Bus signal"
1331
1885
pass
1332
1886
1333
1887
# CheckerStarted - signal
1334
1888
@dbus.service.signal(_interface, signature="s")
1335
1889
def CheckerStarted(self, command):
1336
1890
"D-Bus signal"
1337
1891
pass
1338
1892
1339
1893
# PropertyChanged - signal
1894
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1340
1895
@dbus.service.signal(_interface, signature="sv")
1341
1896
def PropertyChanged(self, property, value):
1342
1897
"D-Bus signal"
1343
1898
pass
1344
1899
1345
1900
# GotSecret - signal
1346
1901
@dbus.service.signal(_interface)
1347
1902
def GotSecret(self):
1350
1905
server to mandos-client
1351
1906
"""
1352
1907
pass
1353
1908
1354
1909
# Rejected - signal
1355
1910
@dbus.service.signal(_interface, signature="s")
1356
1911
def Rejected(self, reason):
1357
1912
"D-Bus signal"
1358
1913
pass
1359
1914
1360
1915
# NeedApproval - signal
1361
1916
@dbus.service.signal(_interface, signature="tb")
1362
1917
def NeedApproval(self, timeout, default):
1363
1918
"D-Bus signal"
1364
1919
return self.need_approval()
1365
1366
## Methods
1367
1920
1921
# Methods
1922
1368
1923
# Approve - method
1369
1924
@dbus.service.method(_interface, in_signature="b")
1370
1925
def Approve(self, value):
1371
1926
self.approve(value)
1372
1927
1373
1928
# CheckedOK - method
1374
1929
@dbus.service.method(_interface)
1375
1930
def CheckedOK(self):
1376
1931
self.checked_ok()
1377
1932
1378
1933
# Enable - method
1934
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1379
1935
@dbus.service.method(_interface)
1380
1936
def Enable(self):
1381
1937
"D-Bus method"
1382
1938
self.enable()
1383
1939
1384
1940
# StartChecker - method
1941
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1385
1942
@dbus.service.method(_interface)
1386
1943
def StartChecker(self):
1387
1944
"D-Bus method"
1388
1945
self.start_checker()
1389
1946
1390
1947
# Disable - method
1948
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1391
1949
@dbus.service.method(_interface)
1392
1950
def Disable(self):
1393
1951
"D-Bus method"
1394
1952
self.disable()
1395
1953
1396
1954
# StopChecker - method
1955
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1397
1956
@dbus.service.method(_interface)
1398
1957
def StopChecker(self):
1399
1958
self.stop_checker()
1400
1401
## Properties
1402
1959
1960
# Properties
1961
1403
1962
# ApprovalPending - property
1404
1963
@dbus_service_property(_interface, signature="b", access="read")
1405
1964
def ApprovalPending_dbus_property(self):
1406
1965
return dbus.Boolean(bool(self.approvals_pending))
1407
1966
1408
1967
# ApprovedByDefault - property
1409
@dbus_service_property(_interface, signature="b",
1968
@dbus_service_property(_interface,
1969
signature="b",
1410
1970
access="readwrite")
1411
1971
def ApprovedByDefault_dbus_property(self, value=None):
1412
1972
if value is None: # get
1413
1973
return dbus.Boolean(self.approved_by_default)
1414
1974
self.approved_by_default = bool(value)
1415
1975
1416
1976
# ApprovalDelay - property
1417
@dbus_service_property(_interface, signature="t",
1977
@dbus_service_property(_interface,
1978
signature="t",
1418
1979
access="readwrite")
1419
1980
def ApprovalDelay_dbus_property(self, value=None):
1420
1981
if value is None: # get
1421
return dbus.UInt64(self.approval_delay_milliseconds())
1982
return dbus.UInt64(self.approval_delay.total_seconds()
1983
* 1000)
1422
1984
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1423
1985
1424
1986
# ApprovalDuration - property
1425
@dbus_service_property(_interface, signature="t",
1987
@dbus_service_property(_interface,
1988
signature="t",
1426
1989
access="readwrite")
1427
1990
def ApprovalDuration_dbus_property(self, value=None):
1428
1991
if value is None: # get
1429
return dbus.UInt64(timedelta_to_milliseconds(
1430
self.approval_duration))
1992
return dbus.UInt64(self.approval_duration.total_seconds()
1993
* 1000)
1431
1994
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1432
1995
1433
1996
# Name - property
1997
@dbus_annotations(
1998
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1434
1999
@dbus_service_property(_interface, signature="s", access="read")
1435
2000
def Name_dbus_property(self):
1436
2001
return dbus.String(self.name)
1437
2002
1438
2003
# Fingerprint - property
2004
@dbus_annotations(
2005
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1439
2006
@dbus_service_property(_interface, signature="s", access="read")
1440
2007
def Fingerprint_dbus_property(self):
1441
2008
return dbus.String(self.fingerprint)
1442
2009
1443
2010
# Host - property
1444
@dbus_service_property(_interface, signature="s",
2011
@dbus_service_property(_interface,
2012
signature="s",
1445
2013
access="readwrite")
1446
2014
def Host_dbus_property(self, value=None):
1447
2015
if value is None: # get
1448
2016
return dbus.String(self.host)
1449
self.host = unicode(value)
1450
2017
self.host = str(value)
2018
1451
2019
# Created - property
2020
@dbus_annotations(
2021
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1452
2022
@dbus_service_property(_interface, signature="s", access="read")
1453
2023
def Created_dbus_property(self):
1454
2024
return datetime_to_dbus(self.created)
1455
2025
1456
2026
# LastEnabled - property
1457
2027
@dbus_service_property(_interface, signature="s", access="read")
1458
2028
def LastEnabled_dbus_property(self):
1459
2029
return datetime_to_dbus(self.last_enabled)
1460
2030
1461
2031
# Enabled - property
1462
@dbus_service_property(_interface, signature="b",
2032
@dbus_service_property(_interface,
2033
signature="b",
1463
2034
access="readwrite")
1464
2035
def Enabled_dbus_property(self, value=None):
1465
2036
if value is None: # get
1468
2039
self.enable()
1469
2040
else:
1470
2041
self.disable()
1471
2042
1472
2043
# LastCheckedOK - property
1473
@dbus_service_property(_interface, signature="s",
2044
@dbus_service_property(_interface,
2045
signature="s",
1474
2046
access="readwrite")
1475
2047
def LastCheckedOK_dbus_property(self, value=None):
1476
2048
if value is not None:
1477
2049
self.checked_ok()
1478
2050
return
1479
2051
return datetime_to_dbus(self.last_checked_ok)
1480
2052
1481
2053
# LastCheckerStatus - property
1482
@dbus_service_property(_interface, signature="n",
1483
access="read")
2054
@dbus_service_property(_interface, signature="n", access="read")
1484
2055
def LastCheckerStatus_dbus_property(self):
1485
2056
return dbus.Int16(self.last_checker_status)
1486
2057
1487
2058
# Expires - property
1488
2059
@dbus_service_property(_interface, signature="s", access="read")
1489
2060
def Expires_dbus_property(self):
1490
2061
return datetime_to_dbus(self.expires)
1491
2062
1492
2063
# LastApprovalRequest - property
1493
2064
@dbus_service_property(_interface, signature="s", access="read")
1494
2065
def LastApprovalRequest_dbus_property(self):
1495
2066
return datetime_to_dbus(self.last_approval_request)
1496
2067
1497
2068
# Timeout - property
1498
@dbus_service_property(_interface, signature="t",
2069
@dbus_service_property(_interface,
2070
signature="t",
1499
2071
access="readwrite")
1500
2072
def Timeout_dbus_property(self, value=None):
1501
2073
if value is None: # get
1502
return dbus.UInt64(self.timeout_milliseconds())
2074
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2075
old_timeout = self.timeout
1503
2076
self.timeout = datetime.timedelta(0, 0, 0, value)
1504
# Reschedule timeout
2077
# Reschedule disabling
1505
2078
if self.enabled:
1506
2079
now = datetime.datetime.utcnow()
1507
time_to_die = timedelta_to_milliseconds(
1508
(self.last_checked_ok + self.timeout) - now)
1509
if time_to_die <= 0:
2080
self.expires += self.timeout - old_timeout
2081
if self.expires <= now:
1510
2082
# The timeout has passed
1511
2083
self.disable()
1512
2084
else:
1513
self.expires = (now +
1514
datetime.timedelta(milliseconds =
1515
time_to_die))
1516
2085
if (getattr(self, "disable_initiator_tag", None)
1517
2086
is None):
1518
2087
return
1519
gobject.source_remove(self.disable_initiator_tag)
1520
self.disable_initiator_tag = (gobject.timeout_add
1521
(time_to_die,
1522
self.disable))
1523
2088
GLib.source_remove(self.disable_initiator_tag)
2089
self.disable_initiator_tag = GLib.timeout_add(
2090
int((self.expires - now).total_seconds() * 1000),
2091
self.disable)
2092
1524
2093
# ExtendedTimeout - property
1525
@dbus_service_property(_interface, signature="t",
2094
@dbus_service_property(_interface,
2095
signature="t",
1526
2096
access="readwrite")
1527
2097
def ExtendedTimeout_dbus_property(self, value=None):
1528
2098
if value is None: # get
1529
return dbus.UInt64(self.extended_timeout_milliseconds())
2099
return dbus.UInt64(self.extended_timeout.total_seconds()
2100
* 1000)
1530
2101
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1531
2102
1532
2103
# Interval - property
1533
@dbus_service_property(_interface, signature="t",
2104
@dbus_service_property(_interface,
2105
signature="t",
1534
2106
access="readwrite")
1535
2107
def Interval_dbus_property(self, value=None):
1536
2108
if value is None: # get
1537
return dbus.UInt64(self.interval_milliseconds())
2109
return dbus.UInt64(self.interval.total_seconds() * 1000)
1538
2110
self.interval = datetime.timedelta(0, 0, 0, value)
1539
2111
if getattr(self, "checker_initiator_tag", None) is None:
1540
2112
return
1541
2113
if self.enabled:
1542
2114
# Reschedule checker run
1543
gobject.source_remove(self.checker_initiator_tag)
1544
self.checker_initiator_tag = (gobject.timeout_add
1545
(value, self.start_checker))
1546
self.start_checker() # Start one now, too
1547
2115
GLib.source_remove(self.checker_initiator_tag)
2116
self.checker_initiator_tag = GLib.timeout_add(
2117
value, self.start_checker)
2118
self.start_checker() # Start one now, too
2119
1548
2120
# Checker - property
1549
@dbus_service_property(_interface, signature="s",
2121
@dbus_service_property(_interface,
2122
signature="s",
1550
2123
access="readwrite")
1551
2124
def Checker_dbus_property(self, value=None):
1552
2125
if value is None: # get
1553
2126
return dbus.String(self.checker_command)
1554
self.checker_command = unicode(value)
1555
2127
self.checker_command = str(value)
2128
1556
2129
# CheckerRunning - property
1557
@dbus_service_property(_interface, signature="b",
2130
@dbus_service_property(_interface,
2131
signature="b",
1558
2132
access="readwrite")
1559
2133
def CheckerRunning_dbus_property(self, value=None):
1560
2134
if value is None: # get
1563
2137
self.start_checker()
1564
2138
else:
1565
2139
self.stop_checker()
1566
2140
1567
2141
# ObjectPath - property
2142
@dbus_annotations(
2143
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2144
"org.freedesktop.DBus.Deprecated": "true"})
1568
2145
@dbus_service_property(_interface, signature="o", access="read")
1569
2146
def ObjectPath_dbus_property(self):
1570
return self.dbus_object_path # is already a dbus.ObjectPath
1571
2147
return self.dbus_object_path # is already a dbus.ObjectPath
2148
1572
2149
# Secret = property
1573
@dbus_service_property(_interface, signature="ay",
1574
access="write", byte_arrays=True)
2150
@dbus_annotations(
2151
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2152
"invalidates"})
2153
@dbus_service_property(_interface,
2154
signature="ay",
2155
access="write",
2156
byte_arrays=True)
1575
2157
def Secret_dbus_property(self, value):
1576
self.secret = str(value)
1577
2158
self.secret = bytes(value)
2159
1578
2160
del _interface
1579
2161
1580
2162
1583
2165
self._pipe = child_pipe
1584
2166
self._pipe.send(('init', fpr, address))
1585
2167
if not self._pipe.recv():
1586
raise KeyError()
1587
2168
raise KeyError(fpr)
2169
1588
2170
def __getattribute__(self, name):
1589
2171
if name == '_pipe':
1590
2172
return super(ProxyClient, self).__getattribute__(name)
1593
2175
if data[0] == 'data':
1594
2176
return data[1]
1595
2177
if data[0] == 'function':
2178
1596
2179
def func(*args, **kwargs):
1597
2180
self._pipe.send(('funcall', name, args, kwargs))
1598
2181
return self._pipe.recv()[1]
2182
1599
2183
return func
1600
2184
1601
2185
def __setattr__(self, name, value):
1602
2186
if name == '_pipe':
1603
2187
return super(ProxyClient, self).__setattr__(name, value)
1604
2188
self._pipe.send(('setattr', name, value))
1605
2189
1606
2190
1607
class ClientDBusTransitional(ClientDBus):
1608
__metaclass__ = AlternateDBusNamesMetaclass
1609
1610
1611
2191
class ClientHandler(socketserver.BaseRequestHandler, object):
1612
2192
"""A class to handle client connections.
1613
2193
1614
2194
Instantiated once for each connection to handle it.
1615
2195
Note: This will run in its own forked process."""
1616
2196
1617
2197
def handle(self):
1618
2198
with contextlib.closing(self.server.child_pipe) as child_pipe:
1619
2199
logger.info("TCP connection from: %s",
1620
unicode(self.client_address))
2200
str(self.client_address))
1621
2201
logger.debug("Pipe FD: %d",
1622
2202
self.server.child_pipe.fileno())
1623
1624
session = (gnutls.connection
1625
.ClientSession(self.request,
1626
gnutls.connection
1627
.X509Credentials()))
1628
1629
# Note: gnutls.connection.X509Credentials is really a
1630
# generic GnuTLS certificate credentials object so long as
1631
# no X.509 keys are added to it. Therefore, we can use it
1632
# here despite using OpenPGP certificates.
1633
1634
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1635
# "+AES-256-CBC", "+SHA1",
1636
# "+COMP-NULL", "+CTYPE-OPENPGP",
1637
# "+DHE-DSS"))
2203
2204
session = gnutls.ClientSession(self.request)
2205
2206
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2207
# "+AES-256-CBC", "+SHA1",
2208
# "+COMP-NULL", "+CTYPE-OPENPGP",
2209
# "+DHE-DSS"))
1638
2210
# Use a fallback default, since this MUST be set.
1639
2211
priority = self.server.gnutls_priority
1640
2212
if priority is None:
1641
2213
priority = "NORMAL"
1642
(gnutls.library.functions
1643
.gnutls_priority_set_direct(session._c_object,
1644
priority, None))
1645
2214
gnutls.priority_set_direct(session._c_object,
2215
priority.encode("utf-8"),
2216
None)
2217
1646
2218
# Start communication using the Mandos protocol
1647
2219
# Get protocol number
1648
2220
line = self.request.makefile().readline()
1649
2221
logger.debug("Protocol version: %r", line)
1650
2222
try:
1651
2223
if int(line.strip().split()[0]) > 1:
1652
raise RuntimeError
2224
raise RuntimeError(line)
1653
2225
except (ValueError, IndexError, RuntimeError) as error:
1654
2226
logger.error("Unknown protocol version: %s", error)
1655
2227
return
1656
2228
1657
2229
# Start GnuTLS connection
1658
2230
try:
1659
2231
session.handshake()
1660
except gnutls.errors.GNUTLSError as error:
2232
except gnutls.Error as error:
1661
2233
logger.warning("Handshake failed: %s", error)
1662
2234
# Do not run session.bye() here: the session is not
1663
2235
# established. Just abandon the request.
1664
2236
return
1665
2237
logger.debug("Handshake succeeded")
1666
2238
1667
2239
approval_required = False
1668
2240
try:
1669
2241
try:
1670
fpr = self.fingerprint(self.peer_certificate
1671
(session))
1672
except (TypeError,
1673
gnutls.errors.GNUTLSError) as error:
2242
fpr = self.fingerprint(
2243
self.peer_certificate(session))
2244
except (TypeError, gnutls.Error) as error:
1674
2245
logger.warning("Bad certificate: %s", error)
1675
2246
return
1676
2247
logger.debug("Fingerprint: %s", fpr)
1677
2248
1678
2249
try:
1679
2250
client = ProxyClient(child_pipe, fpr,
1680
2251
self.client_address)
1681
2252
except KeyError:
1682
2253
return
1683
2254
1684
2255
if client.approval_delay:
1685
2256
delay = client.approval_delay
1686
2257
client.approvals_pending += 1
1687
2258
approval_required = True
1688
2259
1689
2260
while True:
1690
2261
if not client.enabled:
1691
2262
logger.info("Client %s is disabled",
1692
client.name)
2263
client.name)
1693
2264
if self.server.use_dbus:
1694
2265
# Emit D-Bus signal
1695
2266
client.Rejected("Disabled")
1696
2267
return
1697
2268
1698
2269
if client.approved or not client.approval_delay:
1699
#We are approved or approval is disabled
2270
# We are approved or approval is disabled
1700
2271
break
1701
2272
elif client.approved is None:
1702
2273
logger.info("Client %s needs approval",
1704
2275
if self.server.use_dbus:
1705
2276
# Emit D-Bus signal
1706
2277
client.NeedApproval(
1707
client.approval_delay_milliseconds(),
1708
client.approved_by_default)
2278
client.approval_delay.total_seconds()
2279
* 1000, client.approved_by_default)
1709
2280
else:
1710
2281
logger.warning("Client %s was not approved",
1711
2282
client.name)
1713
2284
# Emit D-Bus signal
1714
2285
client.Rejected("Denied")
1715
2286
return
1716
1717
#wait until timeout or approved
2287
2288
# wait until timeout or approved
1718
2289
time = datetime.datetime.now()
1719
2290
client.changedstate.acquire()
1720
(client.changedstate.wait
1721
(float(client.timedelta_to_milliseconds(delay)
1722
/ 1000)))
2291
client.changedstate.wait(delay.total_seconds())
1723
2292
client.changedstate.release()
1724
2293
time2 = datetime.datetime.now()
1725
2294
if (time2 - time) >= delay:
1735
2304
break
1736
2305
else:
1737
2306
delay -= time2 - time
1738
1739
sent_size = 0
1740
while sent_size < len(client.secret):
1741
try:
1742
sent = session.send(client.secret[sent_size:])
1743
except gnutls.errors.GNUTLSError as error:
1744
logger.warning("gnutls send failed",
1745
exc_info=error)
1746
return
1747
logger.debug("Sent: %d, remaining: %d",
1748
sent, len(client.secret)
1749
- (sent_size + sent))
1750
sent_size += sent
1751
2307
2308
try:
2309
session.send(client.secret)
2310
except gnutls.Error as error:
2311
logger.warning("gnutls send failed",
2312
exc_info=error)
2313
return
2314
1752
2315
logger.info("Sending secret to %s", client.name)
1753
2316
# bump the timeout using extended_timeout
1754
2317
client.bump_timeout(client.extended_timeout)
1755
2318
if self.server.use_dbus:
1756
2319
# Emit D-Bus signal
1757
2320
client.GotSecret()
1758
2321
1759
2322
finally:
1760
2323
if approval_required:
1761
2324
client.approvals_pending -= 1
1762
2325
try:
1763
2326
session.bye()
1764
except gnutls.errors.GNUTLSError as error:
2327
except gnutls.Error as error:
1765
2328
logger.warning("GnuTLS bye failed",
1766
2329
exc_info=error)
1767
2330
1768
2331
@staticmethod
1769
2332
def peer_certificate(session):
1770
2333
"Return the peer's OpenPGP certificate as a bytestring"
1771
2334
# If not an OpenPGP certificate...
1772
if (gnutls.library.functions
1773
.gnutls_certificate_type_get(session._c_object)
1774
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1775
# ...do the normal thing
1776
return session.peer_certificate
2335
if (gnutls.certificate_type_get(session._c_object)
2336
!= gnutls.CRT_OPENPGP):
2337
# ...return invalid data
2338
return b""
1777
2339
list_size = ctypes.c_uint(1)
1778
cert_list = (gnutls.library.functions
1779
.gnutls_certificate_get_peers
2340
cert_list = (gnutls.certificate_get_peers
1780
2341
(session._c_object, ctypes.byref(list_size)))
1781
2342
if not bool(cert_list) and list_size.value != 0:
1782
raise gnutls.errors.GNUTLSError("error getting peer"
1783
" certificate")
2343
raise gnutls.Error("error getting peer certificate")
1784
2344
if list_size.value == 0:
1785
2345
return None
1786
2346
cert = cert_list[0]
1787
2347
return ctypes.string_at(cert.data, cert.size)
1788
2348
1789
2349
@staticmethod
1790
2350
def fingerprint(openpgp):
1791
2351
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1792
2352
# New GnuTLS "datum" with the OpenPGP public key
1793
datum = (gnutls.library.types
1794
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1795
ctypes.POINTER
1796
(ctypes.c_ubyte)),
1797
ctypes.c_uint(len(openpgp))))
2353
datum = gnutls.datum_t(
2354
ctypes.cast(ctypes.c_char_p(openpgp),
2355
ctypes.POINTER(ctypes.c_ubyte)),
2356
ctypes.c_uint(len(openpgp)))
1798
2357
# New empty GnuTLS certificate
1799
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1800
(gnutls.library.functions
1801
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2358
crt = gnutls.openpgp_crt_t()
2359
gnutls.openpgp_crt_init(ctypes.byref(crt))
1802
2360
# Import the OpenPGP public key into the certificate
1803
(gnutls.library.functions
1804
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1805
gnutls.library.constants
1806
.GNUTLS_OPENPGP_FMT_RAW))
2361
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2362
gnutls.OPENPGP_FMT_RAW)
1807
2363
# Verify the self signature in the key
1808
2364
crtverify = ctypes.c_uint()
1809
(gnutls.library.functions
1810
.gnutls_openpgp_crt_verify_self(crt, 0,
1811
ctypes.byref(crtverify)))
2365
gnutls.openpgp_crt_verify_self(crt, 0,
2366
ctypes.byref(crtverify))
1812
2367
if crtverify.value != 0:
1813
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1814
raise (gnutls.errors.CertificateSecurityError
1815
("Verify failed"))
2368
gnutls.openpgp_crt_deinit(crt)
2369
raise gnutls.CertificateSecurityError("Verify failed")
1816
2370
# New buffer for the fingerprint
1817
2371
buf = ctypes.create_string_buffer(20)
1818
2372
buf_len = ctypes.c_size_t()
1819
2373
# Get the fingerprint from the certificate into the buffer
1820
(gnutls.library.functions
1821
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1822
ctypes.byref(buf_len)))
2374
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2375
ctypes.byref(buf_len))
1823
2376
# Deinit the certificate
1824
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2377
gnutls.openpgp_crt_deinit(crt)
1825
2378
# Convert the buffer to a Python bytestring
1826
2379
fpr = ctypes.string_at(buf, buf_len.value)
1827
2380
# Convert the bytestring to hexadecimal notation
1831
2384
1832
2385
class MultiprocessingMixIn(object):
1833
2386
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2387
1834
2388
def sub_process_main(self, request, address):
1835
2389
try:
1836
2390
self.finish_request(request, address)
1837
2391
except Exception:
1838
2392
self.handle_error(request, address)
1839
2393
self.close_request(request)
1840
2394
1841
2395
def process_request(self, request, address):
1842
2396
"""Start a new process to process the request."""
1843
proc = multiprocessing.Process(target = self.sub_process_main,
1844
args = (request,
1845
address))
2397
proc = multiprocessing.Process(target=self.sub_process_main,
2398
args=(request, address))
1846
2399
proc.start()
1847
2400
return proc
1848
2401
1849
2402
1850
2403
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1851
2404
""" adds a pipe to the MixIn """
2405
1852
2406
def process_request(self, request, client_address):
1853
2407
"""Overrides and wraps the original process_request().
1854
2408
1855
2409
This function creates a new pipe in self.pipe
1856
2410
"""
1857
2411
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1858
2412
1859
2413
proc = MultiprocessingMixIn.process_request(self, request,
1860
2414
client_address)
1861
2415
self.child_pipe.close()
1862
2416
self.add_pipe(parent_pipe, proc)
1863
2417
1864
2418
def add_pipe(self, parent_pipe, proc):
1865
2419
"""Dummy function; override as necessary"""
1866
raise NotImplementedError
2420
raise NotImplementedError()
1867
2421
1868
2422
1869
2423
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1870
2424
socketserver.TCPServer, object):
1871
2425
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1872
2426
1873
2427
Attributes:
1874
2428
enabled: Boolean; whether this server is activated yet
1875
2429
interface: None or a network interface name (string)
1876
2430
use_ipv6: Boolean; to use IPv6 or not
1877
2431
"""
2432
1878
2433
def __init__(self, server_address, RequestHandlerClass,
1879
interface=None, use_ipv6=True):
2434
interface=None,
2435
use_ipv6=True,
2436
socketfd=None):
2437
"""If socketfd is set, use that file descriptor instead of
2438
creating a new one with socket.socket().
2439
"""
1880
2440
self.interface = interface
1881
2441
if use_ipv6:
1882
2442
self.address_family = socket.AF_INET6
2443
if socketfd is not None:
2444
# Save the file descriptor
2445
self.socketfd = socketfd
2446
# Save the original socket.socket() function
2447
self.socket_socket = socket.socket
2448
2449
# To implement --socket, we monkey patch socket.socket.
2450
#
2451
# (When socketserver.TCPServer is a new-style class, we
2452
# could make self.socket into a property instead of monkey
2453
# patching socket.socket.)
2454
#
2455
# Create a one-time-only replacement for socket.socket()
2456
@functools.wraps(socket.socket)
2457
def socket_wrapper(*args, **kwargs):
2458
# Restore original function so subsequent calls are
2459
# not affected.
2460
socket.socket = self.socket_socket
2461
del self.socket_socket
2462
# This time only, return a new socket object from the
2463
# saved file descriptor.
2464
return socket.fromfd(self.socketfd, *args, **kwargs)
2465
# Replace socket.socket() function with wrapper
2466
socket.socket = socket_wrapper
2467
# The socketserver.TCPServer.__init__ will call
2468
# socket.socket(), which might be our replacement,
2469
# socket_wrapper(), if socketfd was set.
1883
2470
socketserver.TCPServer.__init__(self, server_address,
1884
2471
RequestHandlerClass)
2472
1885
2473
def server_bind(self):
1886
2474
"""This overrides the normal server_bind() function
1887
2475
to bind to an interface if one was specified, and also NOT to
1888
2476
bind to an address or port if they were not specified."""
2477
global SO_BINDTODEVICE
1889
2478
if self.interface is not None:
1890
2479
if SO_BINDTODEVICE is None:
1891
logger.error("SO_BINDTODEVICE does not exist;"
1892
" cannot bind to interface %s",
1893
self.interface)
1894
else:
1895
try:
1896
self.socket.setsockopt(socket.SOL_SOCKET,
1897
SO_BINDTODEVICE,
1898
str(self.interface
1899
+ '\0'))
1900
except socket.error as error:
1901
if error[0] == errno.EPERM:
1902
logger.error("No permission to"
1903
" bind to interface %s",
1904
self.interface)
1905
elif error[0] == errno.ENOPROTOOPT:
1906
logger.error("SO_BINDTODEVICE not available;"
1907
" cannot bind to interface %s",
1908
self.interface)
1909
else:
1910
raise
2480
# Fall back to a hard-coded value which seems to be
2481
# common enough.
2482
logger.warning("SO_BINDTODEVICE not found, trying 25")
2483
SO_BINDTODEVICE = 25
2484
try:
2485
self.socket.setsockopt(
2486
socket.SOL_SOCKET, SO_BINDTODEVICE,
2487
(self.interface + "\0").encode("utf-8"))
2488
except socket.error as error:
2489
if error.errno == errno.EPERM:
2490
logger.error("No permission to bind to"
2491
" interface %s", self.interface)
2492
elif error.errno == errno.ENOPROTOOPT:
2493
logger.error("SO_BINDTODEVICE not available;"
2494
" cannot bind to interface %s",
2495
self.interface)
2496
elif error.errno == errno.ENODEV:
2497
logger.error("Interface %s does not exist,"
2498
" cannot bind", self.interface)
2499
else:
2500
raise
1911
2501
# Only bind(2) the socket if we really need to.
1912
2502
if self.server_address[0] or self.server_address[1]:
1913
2503
if not self.server_address[0]:
1914
2504
if self.address_family == socket.AF_INET6:
1915
any_address = "::" # in6addr_any
2505
any_address = "::" # in6addr_any
1916
2506
else:
1917
any_address = socket.INADDR_ANY
2507
any_address = "0.0.0.0" # INADDR_ANY
1918
2508
self.server_address = (any_address,
1919
2509
self.server_address[1])
1920
2510
elif not self.server_address[1]:
1921
self.server_address = (self.server_address[0],
1922
0)
2511
self.server_address = (self.server_address[0], 0)
1923
2512
# if self.interface:
1924
2513
# self.server_address = (self.server_address[0],
1925
2514
# 0, # port
1931
2520
1932
2521
class MandosServer(IPv6_TCPServer):
1933
2522
"""Mandos server.
1934
2523
1935
2524
Attributes:
1936
2525
clients: set of Client objects
1937
2526
gnutls_priority GnuTLS priority string
1938
2527
use_dbus: Boolean; to emit D-Bus signals or not
1939
1940
Assumes a gobject.MainLoop event loop.
2528
2529
Assumes a GLib.MainLoop event loop.
1941
2530
"""
2531
1942
2532
def __init__(self, server_address, RequestHandlerClass,
1943
interface=None, use_ipv6=True, clients=None,
1944
gnutls_priority=None, use_dbus=True):
2533
interface=None,
2534
use_ipv6=True,
2535
clients=None,
2536
gnutls_priority=None,
2537
use_dbus=True,
2538
socketfd=None):
1945
2539
self.enabled = False
1946
2540
self.clients = clients
1947
2541
if self.clients is None:
1950
2544
self.gnutls_priority = gnutls_priority
1951
2545
IPv6_TCPServer.__init__(self, server_address,
1952
2546
RequestHandlerClass,
1953
interface = interface,
1954
use_ipv6 = use_ipv6)
2547
interface=interface,
2548
use_ipv6=use_ipv6,
2549
socketfd=socketfd)
2550
1955
2551
def server_activate(self):
1956
2552
if self.enabled:
1957
2553
return socketserver.TCPServer.server_activate(self)
1958
2554
1959
2555
def enable(self):
1960
2556
self.enabled = True
1961
2557
1962
2558
def add_pipe(self, parent_pipe, proc):
1963
2559
# Call "handle_ipc" for both data and EOF events
1964
gobject.io_add_watch(parent_pipe.fileno(),
1965
gobject.IO_IN | gobject.IO_HUP,
1966
functools.partial(self.handle_ipc,
1967
parent_pipe =
1968
parent_pipe,
1969
proc = proc))
1970
1971
def handle_ipc(self, source, condition, parent_pipe=None,
1972
proc = None, client_object=None):
1973
condition_names = {
1974
gobject.IO_IN: "IN", # There is data to read.
1975
gobject.IO_OUT: "OUT", # Data can be written (without
1976
# blocking).
1977
gobject.IO_PRI: "PRI", # There is urgent data to read.
1978
gobject.IO_ERR: "ERR", # Error condition.
1979
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1980
# broken, usually for pipes and
1981
# sockets).
1982
}
1983
conditions_string = ' | '.join(name
1984
for cond, name in
1985
condition_names.iteritems()
1986
if cond & condition)
2560
GLib.io_add_watch(
2561
parent_pipe.fileno(),
2562
GLib.IO_IN | GLib.IO_HUP,
2563
functools.partial(self.handle_ipc,
2564
parent_pipe=parent_pipe,
2565
proc=proc))
2566
2567
def handle_ipc(self, source, condition,
2568
parent_pipe=None,
2569
proc=None,
2570
client_object=None):
1987
2571
# error, or the other end of multiprocessing.Pipe has closed
1988
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2572
if condition & (GLib.IO_ERR | GLib.IO_HUP):
1989
2573
# Wait for other process to exit
1990
2574
proc.join()
1991
2575
return False
1992
2576
1993
2577
# Read a request from the child
1994
2578
request = parent_pipe.recv()
1995
2579
command = request[0]
1996
2580
1997
2581
if command == 'init':
1998
fpr = request[1]
2582
fpr = request[1].decode("ascii")
1999
2583
address = request[2]
2000
2001
for c in self.clients.itervalues():
2584
2585
for c in self.clients.values():
2002
2586
if c.fingerprint == fpr:
2003
2587
client = c
2004
2588
break
2011
2595
address[0])
2012
2596
parent_pipe.send(False)
2013
2597
return False
2014
2015
gobject.io_add_watch(parent_pipe.fileno(),
2016
gobject.IO_IN | gobject.IO_HUP,
2017
functools.partial(self.handle_ipc,
2018
parent_pipe =
2019
parent_pipe,
2020
proc = proc,
2021
client_object =
2022
client))
2598
2599
GLib.io_add_watch(
2600
parent_pipe.fileno(),
2601
GLib.IO_IN | GLib.IO_HUP,
2602
functools.partial(self.handle_ipc,
2603
parent_pipe=parent_pipe,
2604
proc=proc,
2605
client_object=client))
2023
2606
parent_pipe.send(True)
2024
2607
# remove the old hook in favor of the new above hook on
2025
2608
# same fileno
2028
2611
funcname = request[1]
2029
2612
args = request[2]
2030
2613
kwargs = request[3]
2031
2614
2032
2615
parent_pipe.send(('data', getattr(client_object,
2033
2616
funcname)(*args,
2034
**kwargs)))
2035
2617
**kwargs)))
2618
2036
2619
if command == 'getattr':
2037
2620
attrname = request[1]
2038
if callable(client_object.__getattribute__(attrname)):
2039
parent_pipe.send(('function',))
2621
if isinstance(client_object.__getattribute__(attrname),
2622
collections.Callable):
2623
parent_pipe.send(('function', ))
2040
2624
else:
2041
parent_pipe.send(('data', client_object
2042
.__getattribute__(attrname)))
2043
2625
parent_pipe.send((
2626
'data', client_object.__getattribute__(attrname)))
2627
2044
2628
if command == 'setattr':
2045
2629
attrname = request[1]
2046
2630
value = request[2]
2047
2631
setattr(client_object, attrname, value)
2048
2632
2049
2633
return True
2050
2634
2051
2635
2636
def rfc3339_duration_to_delta(duration):
2637
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2638
2639
>>> rfc3339_duration_to_delta("P7D")
2640
datetime.timedelta(7)
2641
>>> rfc3339_duration_to_delta("PT60S")
2642
datetime.timedelta(0, 60)
2643
>>> rfc3339_duration_to_delta("PT60M")
2644
datetime.timedelta(0, 3600)
2645
>>> rfc3339_duration_to_delta("PT24H")
2646
datetime.timedelta(1)
2647
>>> rfc3339_duration_to_delta("P1W")
2648
datetime.timedelta(7)
2649
>>> rfc3339_duration_to_delta("PT5M30S")
2650
datetime.timedelta(0, 330)
2651
>>> rfc3339_duration_to_delta("P1DT3M20S")
2652
datetime.timedelta(1, 200)
2653
"""
2654
2655
# Parsing an RFC 3339 duration with regular expressions is not
2656
# possible - there would have to be multiple places for the same
2657
# values, like seconds. The current code, while more esoteric, is
2658
# cleaner without depending on a parsing library. If Python had a
2659
# built-in library for parsing we would use it, but we'd like to
2660
# avoid excessive use of external libraries.
2661
2662
# New type for defining tokens, syntax, and semantics all-in-one
2663
Token = collections.namedtuple("Token", (
2664
"regexp", # To match token; if "value" is not None, must have
2665
# a "group" containing digits
2666
"value", # datetime.timedelta or None
2667
"followers")) # Tokens valid after this token
2668
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2669
# the "duration" ABNF definition in RFC 3339, Appendix A.
2670
token_end = Token(re.compile(r"$"), None, frozenset())
2671
token_second = Token(re.compile(r"(\d+)S"),
2672
datetime.timedelta(seconds=1),
2673
frozenset((token_end, )))
2674
token_minute = Token(re.compile(r"(\d+)M"),
2675
datetime.timedelta(minutes=1),
2676
frozenset((token_second, token_end)))
2677
token_hour = Token(re.compile(r"(\d+)H"),
2678
datetime.timedelta(hours=1),
2679
frozenset((token_minute, token_end)))
2680
token_time = Token(re.compile(r"T"),
2681
None,
2682
frozenset((token_hour, token_minute,
2683
token_second)))
2684
token_day = Token(re.compile(r"(\d+)D"),
2685
datetime.timedelta(days=1),
2686
frozenset((token_time, token_end)))
2687
token_month = Token(re.compile(r"(\d+)M"),
2688
datetime.timedelta(weeks=4),
2689
frozenset((token_day, token_end)))
2690
token_year = Token(re.compile(r"(\d+)Y"),
2691
datetime.timedelta(weeks=52),
2692
frozenset((token_month, token_end)))
2693
token_week = Token(re.compile(r"(\d+)W"),
2694
datetime.timedelta(weeks=1),
2695
frozenset((token_end, )))
2696
token_duration = Token(re.compile(r"P"), None,
2697
frozenset((token_year, token_month,
2698
token_day, token_time,
2699
token_week)))
2700
# Define starting values:
2701
# Value so far
2702
value = datetime.timedelta()
2703
found_token = None
2704
# Following valid tokens
2705
followers = frozenset((token_duration, ))
2706
# String left to parse
2707
s = duration
2708
# Loop until end token is found
2709
while found_token is not token_end:
2710
# Search for any currently valid tokens
2711
for token in followers:
2712
match = token.regexp.match(s)
2713
if match is not None:
2714
# Token found
2715
if token.value is not None:
2716
# Value found, parse digits
2717
factor = int(match.group(1), 10)
2718
# Add to value so far
2719
value += factor * token.value
2720
# Strip token from string
2721
s = token.regexp.sub("", s, 1)
2722
# Go to found token
2723
found_token = token
2724
# Set valid next tokens
2725
followers = found_token.followers
2726
break
2727
else:
2728
# No currently valid tokens were found
2729
raise ValueError("Invalid RFC 3339 duration: {!r}"
2730
.format(duration))
2731
# End token found
2732
return value
2733
2734
2052
2735
def string_to_delta(interval):
2053
2736
"""Parse a string and return a datetime.timedelta
2054
2737
2055
2738
>>> string_to_delta('7d')
2056
2739
datetime.timedelta(7)
2057
2740
>>> string_to_delta('60s')
2065
2748
>>> string_to_delta('5m 30s')
2066
2749
datetime.timedelta(0, 330)
2067
2750
"""
2751
2752
try:
2753
return rfc3339_duration_to_delta(interval)
2754
except ValueError:
2755
pass
2756
2068
2757
timevalue = datetime.timedelta(0)
2069
2758
for s in interval.split():
2070
2759
try:
2071
suffix = unicode(s[-1])
2760
suffix = s[-1]
2072
2761
value = int(s[:-1])
2073
2762
if suffix == "d":
2074
2763
delta = datetime.timedelta(value)
2081
2770
elif suffix == "w":
2082
2771
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2083
2772
else:
2084
raise ValueError("Unknown suffix {0!r}"
2085
.format(suffix))
2086
except (ValueError, IndexError) as e:
2773
raise ValueError("Unknown suffix {!r}".format(suffix))
2774
except IndexError as e:
2087
2775
raise ValueError(*(e.args))
2088
2776
timevalue += delta
2089
2777
return timevalue
2090
2778
2091
2779
2092
def daemon(nochdir = False, noclose = False):
2780
def daemon(nochdir=False, noclose=False):
2093
2781
"""See daemon(3). Standard BSD Unix function.
2094
2782
2095
2783
This should really exist as os.daemon, but it doesn't (yet)."""
2096
2784
if os.fork():
2097
2785
sys.exit()
2105
2793
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2106
2794
if not stat.S_ISCHR(os.fstat(null).st_mode):
2107
2795
raise OSError(errno.ENODEV,
2108
"{0} not a character device"
2796
"{} not a character device"
2109
2797
.format(os.devnull))
2110
2798
os.dup2(null, sys.stdin.fileno())
2111
2799
os.dup2(null, sys.stdout.fileno())
2115
2803
2116
2804
2117
2805
def main():
2118
2806
2119
2807
##################################################################
2120
2808
# Parsing of options, both command line and config file
2121
2809
2122
2810
parser = argparse.ArgumentParser()
2123
2811
parser.add_argument("-v", "--version", action="version",
2124
version = "%(prog)s {0}".format(version),
2812
version="%(prog)s {}".format(version),
2125
2813
help="show version number and exit")
2126
2814
parser.add_argument("-i", "--interface", metavar="IF",
2127
2815
help="Bind to interface IF")
2133
2821
help="Run self-test")
2134
2822
parser.add_argument("--debug", action="store_true",
2135
2823
help="Debug mode; run in foreground and log"
2136
" to terminal")
2824
" to terminal", default=None)
2137
2825
parser.add_argument("--debuglevel", metavar="LEVEL",
2138
2826
help="Debug level for stdout output")
2139
2827
parser.add_argument("--priority", help="GnuTLS"
2146
2834
" files")
2147
2835
parser.add_argument("--no-dbus", action="store_false",
2148
2836
dest="use_dbus", help="Do not provide D-Bus"
2149
" system bus interface")
2837
" system bus interface", default=None)
2150
2838
parser.add_argument("--no-ipv6", action="store_false",
2151
dest="use_ipv6", help="Do not use IPv6")
2839
dest="use_ipv6", help="Do not use IPv6",
2840
default=None)
2152
2841
parser.add_argument("--no-restore", action="store_false",
2153
2842
dest="restore", help="Do not restore stored"
2154
" state")
2843
" state", default=None)
2844
parser.add_argument("--socket", type=int,
2845
help="Specify a file descriptor to a network"
2846
" socket to use instead of creating one")
2155
2847
parser.add_argument("--statedir", metavar="DIR",
2156
2848
help="Directory to save/restore state in")
2157
2849
parser.add_argument("--foreground", action="store_true",
2850
help="Run in foreground", default=None)
2851
parser.add_argument("--no-zeroconf", action="store_false",
2852
dest="zeroconf", help="Do not use Zeroconf",
2853
default=None)
2854
2158
2855
options = parser.parse_args()
2159
2856
2160
2857
if options.check:
2161
2858
import doctest
2162
doctest.testmod()
2163
sys.exit()
2164
2859
fail_count, test_count = doctest.testmod()
2860
sys.exit(os.EX_OK if fail_count == 0 else 1)
2861
2165
2862
# Default values for config file for server-global settings
2166
server_defaults = { "interface": "",
2167
"address": "",
2168
"port": "",
2169
"debug": "False",
2170
"priority":
2171
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2172
"servicename": "Mandos",
2173
"use_dbus": "True",
2174
"use_ipv6": "True",
2175
"debuglevel": "",
2176
"restore": "True",
2177
"statedir": "/var/lib/mandos"
2178
}
2179
2863
server_defaults = {"interface": "",
2864
"address": "",
2865
"port": "",
2866
"debug": "False",
2867
"priority":
2868
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2869
":+SIGN-DSA-SHA256",
2870
"servicename": "Mandos",
2871
"use_dbus": "True",
2872
"use_ipv6": "True",
2873
"debuglevel": "",
2874
"restore": "True",
2875
"socket": "",
2876
"statedir": "/var/lib/mandos",
2877
"foreground": "False",
2878
"zeroconf": "True",
2879
}
2880
2180
2881
# Parse config file for server-global settings
2181
2882
server_config = configparser.SafeConfigParser(server_defaults)
2182
2883
del server_defaults
2183
server_config.read(os.path.join(options.configdir,
2184
"mandos.conf"))
2884
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2185
2885
# Convert the SafeConfigParser object to a dict
2186
2886
server_settings = server_config.defaults()
2187
2887
# Use the appropriate methods on the non-string config options
2188
for option in ("debug", "use_dbus", "use_ipv6"):
2888
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2889
"foreground", "zeroconf"):
2189
2890
server_settings[option] = server_config.getboolean("DEFAULT",
2190
2891
option)
2191
2892
if server_settings["port"]:
2192
2893
server_settings["port"] = server_config.getint("DEFAULT",
2193
2894
"port")
2895
if server_settings["socket"]:
2896
server_settings["socket"] = server_config.getint("DEFAULT",
2897
"socket")
2898
# Later, stdin will, and stdout and stderr might, be dup'ed
2899
# over with an opened os.devnull. But we don't want this to
2900
# happen with a supplied network socket.
2901
if 0 <= server_settings["socket"] <= 2:
2902
server_settings["socket"] = os.dup(server_settings
2903
["socket"])
2194
2904
del server_config
2195
2905
2196
2906
# Override the settings from the config file with command line
2197
2907
# options, if set.
2198
2908
for option in ("interface", "address", "port", "debug",
2199
"priority", "servicename", "configdir",
2200
"use_dbus", "use_ipv6", "debuglevel", "restore",
2201
"statedir"):
2909
"priority", "servicename", "configdir", "use_dbus",
2910
"use_ipv6", "debuglevel", "restore", "statedir",
2911
"socket", "foreground", "zeroconf"):
2202
2912
value = getattr(options, option)
2203
2913
if value is not None:
2204
2914
server_settings[option] = value
2205
2915
del options
2206
2916
# Force all strings to be unicode
2207
2917
for option in server_settings.keys():
2208
if type(server_settings[option]) is str:
2209
server_settings[option] = unicode(server_settings[option])
2918
if isinstance(server_settings[option], bytes):
2919
server_settings[option] = (server_settings[option]
2920
.decode("utf-8"))
2921
# Force all boolean options to be boolean
2922
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2923
"foreground", "zeroconf"):
2924
server_settings[option] = bool(server_settings[option])
2925
# Debug implies foreground
2926
if server_settings["debug"]:
2927
server_settings["foreground"] = True
2210
2928
# Now we have our good server settings in "server_settings"
2211
2929
2212
2930
##################################################################
2213
2931
2932
if (not server_settings["zeroconf"]
2933
and not (server_settings["port"]
2934
or server_settings["socket"] != "")):
2935
parser.error("Needs port or socket to work without Zeroconf")
2936
2214
2937
# For convenience
2215
2938
debug = server_settings["debug"]
2216
2939
debuglevel = server_settings["debuglevel"]
2218
2941
use_ipv6 = server_settings["use_ipv6"]
2219
2942
stored_state_path = os.path.join(server_settings["statedir"],
2220
2943
stored_state_file)
2221
2944
foreground = server_settings["foreground"]
2945
zeroconf = server_settings["zeroconf"]
2946
2222
2947
if debug:
2223
2948
initlogger(debug, logging.DEBUG)
2224
2949
else:
2227
2952
else:
2228
2953
level = getattr(logging, debuglevel.upper())
2229
2954
initlogger(debug, level)
2230
2955
2231
2956
if server_settings["servicename"] != "Mandos":
2232
syslogger.setFormatter(logging.Formatter
2233
('Mandos ({0}) [%(process)d]:'
2234
' %(levelname)s: %(message)s'
2235
.format(server_settings
2236
["servicename"])))
2237
2957
syslogger.setFormatter(
2958
logging.Formatter('Mandos ({}) [%(process)d]:'
2959
' %(levelname)s: %(message)s'.format(
2960
server_settings["servicename"])))
2961
2238
2962
# Parse config file with clients
2239
2963
client_config = configparser.SafeConfigParser(Client
2240
2964
.client_defaults)
2241
2965
client_config.read(os.path.join(server_settings["configdir"],
2242
2966
"clients.conf"))
2243
2967
2244
2968
global mandos_dbus_service
2245
2969
mandos_dbus_service = None
2246
2247
tcp_server = MandosServer((server_settings["address"],
2248
server_settings["port"]),
2249
ClientHandler,
2250
interface=(server_settings["interface"]
2251
or None),
2252
use_ipv6=use_ipv6,
2253
gnutls_priority=
2254
server_settings["priority"],
2255
use_dbus=use_dbus)
2256
if not debug:
2257
pidfilename = "/var/run/mandos.pid"
2970
2971
socketfd = None
2972
if server_settings["socket"] != "":
2973
socketfd = server_settings["socket"]
2974
tcp_server = MandosServer(
2975
(server_settings["address"], server_settings["port"]),
2976
ClientHandler,
2977
interface=(server_settings["interface"] or None),
2978
use_ipv6=use_ipv6,
2979
gnutls_priority=server_settings["priority"],
2980
use_dbus=use_dbus,
2981
socketfd=socketfd)
2982
if not foreground:
2983
pidfilename = "/run/mandos.pid"
2984
if not os.path.isdir("/run/."):
2985
pidfilename = "/var/run/mandos.pid"
2986
pidfile = None
2258
2987
try:
2259
pidfile = open(pidfilename, "w")
2988
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2260
2989
except IOError as e:
2261
2990
logger.error("Could not open file %r", pidfilename,
2262
2991
exc_info=e)
2263
2264
for name in ("_mandos", "mandos", "nobody"):
2992
2993
for name, group in (("_mandos", "_mandos"),
2994
("mandos", "mandos"),
2995
("nobody", "nogroup")):
2265
2996
try:
2266
2997
uid = pwd.getpwnam(name).pw_uid
2267
gid = pwd.getpwnam(name).pw_gid
2998
gid = pwd.getpwnam(group).pw_gid
2268
2999
break
2269
3000
except KeyError:
2270
3001
continue
2274
3005
try:
2275
3006
os.setgid(gid)
2276
3007
os.setuid(uid)
3008
if debug:
3009
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3010
gid))
2277
3011
except OSError as error:
2278
if error[0] != errno.EPERM:
2279
raise error
2280
3012
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3013
.format(uid, gid, os.strerror(error.errno)))
3014
if error.errno != errno.EPERM:
3015
raise
3016
2281
3017
if debug:
2282
3018
# Enable all possible GnuTLS debugging
2283
3019
2284
3020
# "Use a log level over 10 to enable all debugging options."
2285
3021
# - GnuTLS manual
2286
gnutls.library.functions.gnutls_global_set_log_level(11)
2287
2288
@gnutls.library.types.gnutls_log_func
3022
gnutls.global_set_log_level(11)
3023
3024
@gnutls.log_func
2289
3025
def debug_gnutls(level, string):
2290
3026
logger.debug("GnuTLS: %s", string[:-1])
2291
2292
(gnutls.library.functions
2293
.gnutls_global_set_log_function(debug_gnutls))
2294
3027
3028
gnutls.global_set_log_function(debug_gnutls)
3029
2295
3030
# Redirect stdin so all checkers get /dev/null
2296
3031
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2297
3032
os.dup2(null, sys.stdin.fileno())
2298
3033
if null > 2:
2299
3034
os.close(null)
2300
3035
2301
3036
# Need to fork before connecting to D-Bus
2302
if not debug:
3037
if not foreground:
2303
3038
# Close all input and output, do double fork, etc.
2304
3039
daemon()
2305
2306
gobject.threads_init()
2307
3040
3041
# multiprocessing will use threads, so before we use GLib we need
3042
# to inform GLib that threads will be used.
3043
GLib.threads_init()
3044
2308
3045
global main_loop
2309
3046
# From the Avahi example code
2310
3047
DBusGMainLoop(set_as_default=True)
2311
main_loop = gobject.MainLoop()
3048
main_loop = GLib.MainLoop()
2312
3049
bus = dbus.SystemBus()
2313
3050
# End of Avahi example code
2314
3051
if use_dbus:
2315
3052
try:
2316
3053
bus_name = dbus.service.BusName("se.recompile.Mandos",
2317
bus, do_not_queue=True)
2318
old_bus_name = (dbus.service.BusName
2319
("se.bsnet.fukt.Mandos", bus,
2320
do_not_queue=True))
2321
except dbus.exceptions.NameExistsException as e:
3054
bus,
3055
do_not_queue=True)
3056
old_bus_name = dbus.service.BusName(
3057
"se.bsnet.fukt.Mandos", bus,
3058
do_not_queue=True)
3059
except dbus.exceptions.DBusException as e:
2322
3060
logger.error("Disabling D-Bus:", exc_info=e)
2323
3061
use_dbus = False
2324
3062
server_settings["use_dbus"] = False
2325
3063
tcp_server.use_dbus = False
2326
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2327
service = AvahiServiceToSyslog(name =
2328
server_settings["servicename"],
2329
servicetype = "_mandos._tcp",
2330
protocol = protocol, bus = bus)
2331
if server_settings["interface"]:
2332
service.interface = (if_nametoindex
2333
(str(server_settings["interface"])))
2334
3064
if zeroconf:
3065
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3066
service = AvahiServiceToSyslog(
3067
name=server_settings["servicename"],
3068
servicetype="_mandos._tcp",
3069
protocol=protocol,
3070
bus=bus)
3071
if server_settings["interface"]:
3072
service.interface = if_nametoindex(
3073
server_settings["interface"].encode("utf-8"))
3074
2335
3075
global multiprocessing_manager
2336
3076
multiprocessing_manager = multiprocessing.Manager()
2337
3077
2338
3078
client_class = Client
2339
3079
if use_dbus:
2340
client_class = functools.partial(ClientDBusTransitional,
2341
bus = bus)
2342
3080
client_class = functools.partial(ClientDBus, bus=bus)
3081
2343
3082
client_settings = Client.config_parser(client_config)
2344
3083
old_client_settings = {}
2345
3084
clients_data = {}
2346
3085
3086
# This is used to redirect stdout and stderr for checker processes
3087
global wnull
3088
wnull = open(os.devnull, "w") # A writable /dev/null
3089
# Only used if server is running in foreground but not in debug
3090
# mode
3091
if debug or not foreground:
3092
wnull.close()
3093
2347
3094
# Get client data and settings from last running state.
2348
3095
if server_settings["restore"]:
2349
3096
try:
2350
3097
with open(stored_state_path, "rb") as stored_state:
2351
clients_data, old_client_settings = (pickle.load
2352
(stored_state))
3098
if sys.version_info.major == 2:
3099
clients_data, old_client_settings = pickle.load(
3100
stored_state)
3101
else:
3102
bytes_clients_data, bytes_old_client_settings = (
3103
pickle.load(stored_state, encoding="bytes"))
3104
# Fix bytes to strings
3105
# clients_data
3106
# .keys()
3107
clients_data = {(key.decode("utf-8")
3108
if isinstance(key, bytes)
3109
else key): value
3110
for key, value in
3111
bytes_clients_data.items()}
3112
del bytes_clients_data
3113
for key in clients_data:
3114
value = {(k.decode("utf-8")
3115
if isinstance(k, bytes) else k): v
3116
for k, v in
3117
clients_data[key].items()}
3118
clients_data[key] = value
3119
# .client_structure
3120
value["client_structure"] = [
3121
(s.decode("utf-8")
3122
if isinstance(s, bytes)
3123
else s) for s in
3124
value["client_structure"]]
3125
# .name & .host
3126
for k in ("name", "host"):
3127
if isinstance(value[k], bytes):
3128
value[k] = value[k].decode("utf-8")
3129
# old_client_settings
3130
# .keys()
3131
old_client_settings = {
3132
(key.decode("utf-8")
3133
if isinstance(key, bytes)
3134
else key): value
3135
for key, value in
3136
bytes_old_client_settings.items()}
3137
del bytes_old_client_settings
3138
# .host
3139
for value in old_client_settings.values():
3140
if isinstance(value["host"], bytes):
3141
value["host"] = (value["host"]
3142
.decode("utf-8"))
2353
3143
os.remove(stored_state_path)
2354
3144
except IOError as e:
2355
3145
if e.errno == errno.ENOENT:
2356
logger.warning("Could not load persistent state: {0}"
2357
.format(os.strerror(e.errno)))
3146
logger.warning("Could not load persistent state:"
3147
" {}".format(os.strerror(e.errno)))
2358
3148
else:
2359
3149
logger.critical("Could not load persistent state:",
2360
3150
exc_info=e)
2361
3151
raise
2362
3152
except EOFError as e:
2363
3153
logger.warning("Could not load persistent state: "
2364
"EOFError:", exc_info=e)
2365
3154
"EOFError:",
3155
exc_info=e)
3156
2366
3157
with PGPEngine() as pgp:
2367
for client_name, client in clients_data.iteritems():
3158
for client_name, client in clients_data.items():
3159
# Skip removed clients
3160
if client_name not in client_settings:
3161
continue
3162
2368
3163
# Decide which value to use after restoring saved state.
2369
3164
# We have three different values: Old config file,
2370
3165
# new config file, and saved state.
2375
3170
# For each value in new config, check if it
2376
3171
# differs from the old config value (Except for
2377
3172
# the "secret" attribute)
2378
if (name != "secret" and
2379
value != old_client_settings[client_name]
2380
[name]):
3173
if (name != "secret"
3174
and (value !=
3175
old_client_settings[client_name][name])):
2381
3176
client[name] = value
2382
3177
except KeyError:
2383
3178
pass
2384
3179
2385
3180
# Clients who has passed its expire date can still be
2386
# enabled if its last checker was successful. Clients
3181
# enabled if its last checker was successful. A Client
2387
3182
# whose checker succeeded before we stored its state is
2388
3183
# assumed to have successfully run all checkers during
2389
3184
# downtime.
2391
3186
if datetime.datetime.utcnow() >= client["expires"]:
2392
3187
if not client["last_checked_ok"]:
2393
3188
logger.warning(
2394
"disabling client {0} - Client never "
2395
"performed a successful checker"
2396
.format(client_name))
3189
"disabling client {} - Client never "
3190
"performed a successful checker".format(
3191
client_name))
2397
3192
client["enabled"] = False
2398
3193
elif client["last_checker_status"] != 0:
2399
3194
logger.warning(
2400
"disabling client {0} - Client "
2401
"last checker failed with error code {1}"
2402
.format(client_name,
2403
client["last_checker_status"]))
3195
"disabling client {} - Client last"
3196
" checker failed with error code"
3197
" {}".format(
3198
client_name,
3199
client["last_checker_status"]))
2404
3200
client["enabled"] = False
2405
3201
else:
2406
client["expires"] = (datetime.datetime
2407
.utcnow()
2408
+ client["timeout"])
3202
client["expires"] = (
3203
datetime.datetime.utcnow()
3204
+ client["timeout"])
2409
3205
logger.debug("Last checker succeeded,"
2410
" keeping {0} enabled"
2411
.format(client_name))
3206
" keeping {} enabled".format(
3207
client_name))
2412
3208
try:
2413
client["secret"] = (
2414
pgp.decrypt(client["encrypted_secret"],
2415
client_settings[client_name]
2416
["secret"]))
3209
client["secret"] = pgp.decrypt(
3210
client["encrypted_secret"],
3211
client_settings[client_name]["secret"])
2417
3212
except PGPError:
2418
3213
# If decryption fails, we use secret from new settings
2419
logger.debug("Failed to decrypt {0} old secret"
2420
.format(client_name))
2421
client["secret"] = (
2422
client_settings[client_name]["secret"])
2423
3214
logger.debug("Failed to decrypt {} old secret".format(
3215
client_name))
3216
client["secret"] = (client_settings[client_name]
3217
["secret"])
3218
2424
3219
# Add/remove clients based on new changes made to config
2425
3220
for client_name in (set(old_client_settings)
2426
3221
- set(client_settings)):
2428
3223
for client_name in (set(client_settings)
2429
3224
- set(old_client_settings)):
2430
3225
clients_data[client_name] = client_settings[client_name]
2431
3226
2432
3227
# Create all client objects
2433
for client_name, client in clients_data.iteritems():
3228
for client_name, client in clients_data.items():
2434
3229
tcp_server.clients[client_name] = client_class(
2435
name = client_name, settings = client)
2436
3230
name=client_name,
3231
settings=client,
3232
server_settings=server_settings)
3233
2437
3234
if not tcp_server.clients:
2438
3235
logger.warning("No clients defined")
2439
2440
if not debug:
2441
try:
2442
with pidfile:
2443
pid = os.getpid()
2444
pidfile.write(str(pid) + "\n".encode("utf-8"))
2445
del pidfile
2446
except IOError:
2447
logger.error("Could not write to file %r with PID %d",
2448
pidfilename, pid)
2449
except NameError:
2450
# "pidfile" was never created
2451
pass
3236
3237
if not foreground:
3238
if pidfile is not None:
3239
pid = os.getpid()
3240
try:
3241
with pidfile:
3242
print(pid, file=pidfile)
3243
except IOError:
3244
logger.error("Could not write to file %r with PID %d",
3245
pidfilename, pid)
3246
del pidfile
2452
3247
del pidfilename
2453
signal.signal(signal.SIGINT, signal.SIG_IGN)
2454
2455
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2456
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2457
3248
3249
for termsig in (signal.SIGHUP, signal.SIGTERM):
3250
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3251
lambda: main_loop.quit() and False)
3252
2458
3253
if use_dbus:
2459
class MandosDBusService(DBusObjectWithProperties):
3254
3255
@alternate_dbus_interfaces(
3256
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3257
class MandosDBusService(DBusObjectWithObjectManager):
2460
3258
"""A D-Bus proxy object"""
3259
2461
3260
def __init__(self):
2462
3261
dbus.service.Object.__init__(self, bus, "/")
3262
2463
3263
_interface = "se.recompile.Mandos"
2464
2465
@dbus_interface_annotations(_interface)
2466
def _foo(self):
2467
return { "org.freedesktop.DBus.Property"
2468
".EmitsChangedSignal":
2469
"false"}
2470
3264
2471
3265
@dbus.service.signal(_interface, signature="o")
2472
3266
def ClientAdded(self, objpath):
2473
3267
"D-Bus signal"
2474
3268
pass
2475
3269
2476
3270
@dbus.service.signal(_interface, signature="ss")
2477
3271
def ClientNotFound(self, fingerprint, address):
2478
3272
"D-Bus signal"
2479
3273
pass
2480
3274
3275
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3276
"true"})
2481
3277
@dbus.service.signal(_interface, signature="os")
2482
3278
def ClientRemoved(self, objpath, name):
2483
3279
"D-Bus signal"
2484
3280
pass
2485
3281
3282
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3283
"true"})
2486
3284
@dbus.service.method(_interface, out_signature="ao")
2487
3285
def GetAllClients(self):
2488
3286
"D-Bus method"
2489
return dbus.Array(c.dbus_object_path
2490
for c in
2491
tcp_server.clients.itervalues())
2492
3287
return dbus.Array(c.dbus_object_path for c in
3288
tcp_server.clients.values())
3289
3290
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3291
"true"})
2493
3292
@dbus.service.method(_interface,
2494
3293
out_signature="a{oa{sv}}")
2495
3294
def GetAllClientsWithProperties(self):
2496
3295
"D-Bus method"
2497
3296
return dbus.Dictionary(
2498
((c.dbus_object_path, c.GetAll(""))
2499
for c in tcp_server.clients.itervalues()),
3297
{c.dbus_object_path: c.GetAll(
3298
"se.recompile.Mandos.Client")
3299
for c in tcp_server.clients.values()},
2500
3300
signature="oa{sv}")
2501
3301
2502
3302
@dbus.service.method(_interface, in_signature="o")
2503
3303
def RemoveClient(self, object_path):
2504
3304
"D-Bus method"
2505
for c in tcp_server.clients.itervalues():
3305
for c in tcp_server.clients.values():
2506
3306
if c.dbus_object_path == object_path:
2507
3307
del tcp_server.clients[c.name]
2508
3308
c.remove_from_connection()
2509
# Don't signal anything except ClientRemoved
3309
# Don't signal the disabling
2510
3310
c.disable(quiet=True)
2511
# Emit D-Bus signal
2512
self.ClientRemoved(object_path, c.name)
3311
# Emit D-Bus signal for removal
3312
self.client_removed_signal(c)
2513
3313
return
2514
3314
raise KeyError(object_path)
2515
3315
2516
3316
del _interface
2517
2518
class MandosDBusServiceTransitional(MandosDBusService):
2519
__metaclass__ = AlternateDBusNamesMetaclass
2520
mandos_dbus_service = MandosDBusServiceTransitional()
2521
3317
3318
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3319
out_signature="a{oa{sa{sv}}}")
3320
def GetManagedObjects(self):
3321
"""D-Bus method"""
3322
return dbus.Dictionary(
3323
{client.dbus_object_path:
3324
dbus.Dictionary(
3325
{interface: client.GetAll(interface)
3326
for interface in
3327
client._get_all_interface_names()})
3328
for client in tcp_server.clients.values()})
3329
3330
def client_added_signal(self, client):
3331
"""Send the new standard signal and the old signal"""
3332
if use_dbus:
3333
# New standard signal
3334
self.InterfacesAdded(
3335
client.dbus_object_path,
3336
dbus.Dictionary(
3337
{interface: client.GetAll(interface)
3338
for interface in
3339
client._get_all_interface_names()}))
3340
# Old signal
3341
self.ClientAdded(client.dbus_object_path)
3342
3343
def client_removed_signal(self, client):
3344
"""Send the new standard signal and the old signal"""
3345
if use_dbus:
3346
# New standard signal
3347
self.InterfacesRemoved(
3348
client.dbus_object_path,
3349
client._get_all_interface_names())
3350
# Old signal
3351
self.ClientRemoved(client.dbus_object_path,
3352
client.name)
3353
3354
mandos_dbus_service = MandosDBusService()
3355
3356
# Save modules to variables to exempt the modules from being
3357
# unloaded before the function registered with atexit() is run.
3358
mp = multiprocessing
3359
wn = wnull
3360
2522
3361
def cleanup():
2523
3362
"Cleanup function; run on exit"
2524
service.cleanup()
2525
2526
multiprocessing.active_children()
3363
if zeroconf:
3364
service.cleanup()
3365
3366
mp.active_children()
3367
wn.close()
2527
3368
if not (tcp_server.clients or client_settings):
2528
3369
return
2529
3370
2530
3371
# Store client before exiting. Secrets are encrypted with key
2531
3372
# based on what config file has. If config file is
2532
3373
# removed/edited, old secret will thus be unrecovable.
2533
3374
clients = {}
2534
3375
with PGPEngine() as pgp:
2535
for client in tcp_server.clients.itervalues():
3376
for client in tcp_server.clients.values():
2536
3377
key = client_settings[client.name]["secret"]
2537
3378
client.encrypted_secret = pgp.encrypt(client.secret,
2538
3379
key)
2539
3380
client_dict = {}
2540
3381
2541
3382
# A list of attributes that can not be pickled
2542
3383
# + secret.
2543
exclude = set(("bus", "changedstate", "secret",
2544
"checker"))
2545
for name, typ in (inspect.getmembers
2546
(dbus.service.Object)):
3384
exclude = {"bus", "changedstate", "secret",
3385
"checker", "server_settings"}
3386
for name, typ in inspect.getmembers(dbus.service
3387
.Object):
2547
3388
exclude.add(name)
2548
3389
2549
3390
client_dict["encrypted_secret"] = (client
2550
3391
.encrypted_secret)
2551
3392
for attr in client.client_structure:
2552
3393
if attr not in exclude:
2553
3394
client_dict[attr] = getattr(client, attr)
2554
3395
2555
3396
clients[client.name] = client_dict
2556
3397
del client_settings[client.name]["secret"]
2557
3398
2558
3399
try:
2559
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2560
prefix="clients-",
2561
dir=os.path.dirname
2562
(stored_state_path))
2563
with os.fdopen(tempfd, "wb") as stored_state:
2564
pickle.dump((clients, client_settings), stored_state)
3400
with tempfile.NamedTemporaryFile(
3401
mode='wb',
3402
suffix=".pickle",
3403
prefix='clients-',
3404
dir=os.path.dirname(stored_state_path),
3405
delete=False) as stored_state:
3406
pickle.dump((clients, client_settings), stored_state,
3407
protocol=2)
3408
tempname = stored_state.name
2565
3409
os.rename(tempname, stored_state_path)
2566
3410
except (IOError, OSError) as e:
2567
3411
if not debug:
2570
3414
except NameError:
2571
3415
pass
2572
3416
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2573
logger.warning("Could not save persistent state: {0}"
3417
logger.warning("Could not save persistent state: {}"
2574
3418
.format(os.strerror(e.errno)))
2575
3419
else:
2576
3420
logger.warning("Could not save persistent state:",
2577
3421
exc_info=e)
2578
raise e
2579
3422
raise
3423
2580
3424
# Delete all clients, and settings from config
2581
3425
while tcp_server.clients:
2582
3426
name, client = tcp_server.clients.popitem()
2583
3427
if use_dbus:
2584
3428
client.remove_from_connection()
2585
# Don't signal anything except ClientRemoved
3429
# Don't signal the disabling
2586
3430
client.disable(quiet=True)
3431
# Emit D-Bus signal for removal
2587
3432
if use_dbus:
2588
# Emit D-Bus signal
2589
mandos_dbus_service.ClientRemoved(client
2590
.dbus_object_path,
2591
client.name)
3433
mandos_dbus_service.client_removed_signal(client)
2592
3434
client_settings.clear()
2593
3435
2594
3436
atexit.register(cleanup)
2595
2596
for client in tcp_server.clients.itervalues():
3437
3438
for client in tcp_server.clients.values():
2597
3439
if use_dbus:
2598
# Emit D-Bus signal
2599
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3440
# Emit D-Bus signal for adding
3441
mandos_dbus_service.client_added_signal(client)
2600
3442
# Need to initiate checking of clients
2601
3443
if client.enabled:
2602
3444
client.init_checker()
2603
3445
2604
3446
tcp_server.enable()
2605
3447
tcp_server.server_activate()
2606
3448
2607
3449
# Find out what port we got
2608
service.port = tcp_server.socket.getsockname()[1]
3450
if zeroconf:
3451
service.port = tcp_server.socket.getsockname()[1]
2609
3452
if use_ipv6:
2610
3453
logger.info("Now listening on address %r, port %d,"
2611
3454
" flowinfo %d, scope_id %d",
2613
3456
else: # IPv4
2614
3457
logger.info("Now listening on address %r, port %d",
2615
3458
*tcp_server.socket.getsockname())
2616
2617
#service.interface = tcp_server.socket.getsockname()[3]
2618
3459
3460
# service.interface = tcp_server.socket.getsockname()[3]
3461
2619
3462
try:
2620
# From the Avahi example code
2621
try:
2622
service.activate()
2623
except dbus.exceptions.DBusException as error:
2624
logger.critical("D-Bus Exception", exc_info=error)
2625
cleanup()
2626
sys.exit(1)
2627
# End of Avahi example code
2628
2629
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2630
lambda *args, **kwargs:
2631
(tcp_server.handle_request
2632
(*args[2:], **kwargs) or True))
2633
3463
if zeroconf:
3464
# From the Avahi example code
3465
try:
3466
service.activate()
3467
except dbus.exceptions.DBusException as error:
3468
logger.critical("D-Bus Exception", exc_info=error)
3469
cleanup()
3470
sys.exit(1)
3471
# End of Avahi example code
3472
3473
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3474
lambda *args, **kwargs:
3475
(tcp_server.handle_request
3476
(*args[2:], **kwargs) or True))
3477
2634
3478
logger.debug("Starting main loop")
2635
3479
main_loop.run()
2636
3480
except AvahiError as error:
2645
3489
# Must run before the D-Bus bus name gets deregistered
2646
3490
cleanup()
2647
3491
3492
2648
3493
if __name__ == '__main__':
2649
3494
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0