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- Committer: Teddy Hogeborn
- Date: 2016-10-05 20:13:01 UTC
- mto: This revision was merged to the branch mainline in revision 878.
- Revision ID: teddy@recompile.se-20161005201301-3ibock2agjb2ppe6
Tags: version-1.7.12-1
* Makefile (version): Change to 1.7.12.
* NEWS (Version 1.7.12): Add new entry.
* debian/changelog (1.7.12-1): - '' -
* NEWS (Version 1.7.12): Add new entry.
* debian/changelog (1.7.12-1): - '' -
- 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 -*-
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#
3
#
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# Mandos server - give out binary blobs to connecting clients.
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#
5
#
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# This program is partly derived from an example program for an Avahi
7
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# 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
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
#
14
# Copyright © 2008-2016 Teddy Hogeborn
15
# Copyright © 2008-2016 Björn Påhlsson
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#
17
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# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
19
19
# the Free Software Foundation, either version 3 of the License, or
23
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
25
# GNU General Public License for more details.
26
#
26
#
27
27
# You should have received a copy of the GNU General Public License
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
#
30
#
31
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# Contact the authors at <mandos@recompile.se>.
32
#
32
#
33
33
34
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from __future__ import (division, absolute_import, print_function,
35
35
unicode_literals)
36
36
37
import SocketServer as socketserver
37
try:
38
from future_builtins import *
39
except ImportError:
40
pass
41
42
try:
43
import SocketServer as socketserver
44
except ImportError:
45
import socketserver
38
46
import socket
39
47
import argparse
40
48
import datetime
41
49
import errno
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
50
try:
51
import ConfigParser as configparser
52
except ImportError:
53
import configparser
49
54
import sys
50
55
import re
51
56
import os
60
65
import struct
61
66
import fcntl
62
67
import functools
63
import cPickle as pickle
68
try:
69
import cPickle as pickle
70
except ImportError:
71
import pickle
64
72
import multiprocessing
65
73
import types
66
74
import binascii
67
75
import tempfile
76
import itertools
77
import collections
78
import codecs
68
79
69
80
import dbus
70
81
import dbus.service
71
import gobject
72
import avahi
82
from gi.repository import GLib
73
83
from dbus.mainloop.glib import DBusGMainLoop
74
84
import ctypes
75
85
import ctypes.util
76
86
import xml.dom.minidom
77
87
import inspect
78
import GnuPGInterface
79
88
89
# Try to find the value of SO_BINDTODEVICE:
80
90
try:
91
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
92
# newer, and it is also the most natural place for it:
81
93
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
82
94
except AttributeError:
83
95
try:
96
# This is where SO_BINDTODEVICE was up to and including Python
97
# 2.6, and also 3.2:
84
98
from IN import SO_BINDTODEVICE
85
99
except ImportError:
86
SO_BINDTODEVICE = None
87
88
version = "1.4.1"
100
# In Python 2.7 it seems to have been removed entirely.
101
# Try running the C preprocessor:
102
try:
103
cc = subprocess.Popen(["cc", "--language=c", "-E",
104
"/dev/stdin"],
105
stdin=subprocess.PIPE,
106
stdout=subprocess.PIPE)
107
stdout = cc.communicate(
108
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
109
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
110
except (OSError, ValueError, IndexError):
111
# No value found
112
SO_BINDTODEVICE = None
113
114
if sys.version_info.major == 2:
115
str = unicode
116
117
version = "1.7.12"
89
118
stored_state_file = "clients.pickle"
90
119
91
120
logger = logging.getLogger()
92
syslogger = (logging.handlers.SysLogHandler
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
121
syslogger = None
95
122
96
123
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
124
if_nametoindex = ctypes.cdll.LoadLibrary(
125
ctypes.util.find_library("c")).if_nametoindex
100
126
except (OSError, AttributeError):
127
101
128
def if_nametoindex(interface):
102
129
"Get an interface index the hard way, i.e. using fcntl()"
103
130
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
131
with contextlib.closing(socket.socket()) as s:
105
132
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
133
struct.pack(b"16s16x", interface))
134
interface_index = struct.unpack("I", ifreq[16:20])[0]
110
135
return interface_index
111
136
112
137
138
def copy_function(func):
139
"""Make a copy of a function"""
140
if sys.version_info.major == 2:
141
return types.FunctionType(func.func_code,
142
func.func_globals,
143
func.func_name,
144
func.func_defaults,
145
func.func_closure)
146
else:
147
return types.FunctionType(func.__code__,
148
func.__globals__,
149
func.__name__,
150
func.__defaults__,
151
func.__closure__)
152
153
113
154
def initlogger(debug, level=logging.WARNING):
114
155
"""init logger and add loglevel"""
115
156
157
global syslogger
158
syslogger = (logging.handlers.SysLogHandler(
159
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
160
address="/dev/log"))
116
161
syslogger.setFormatter(logging.Formatter
117
162
('Mandos [%(process)d]: %(levelname)s:'
118
163
' %(message)s'))
119
164
logger.addHandler(syslogger)
120
165
121
166
if debug:
122
167
console = logging.StreamHandler()
123
168
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
135
180
136
181
class PGPEngine(object):
137
182
"""A simple class for OpenPGP symmetric encryption & decryption"""
183
138
184
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
140
185
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
141
self.gnupg = GnuPGInterface.GnuPG()
142
self.gnupg.options.meta_interactive = False
143
self.gnupg.options.homedir = self.tempdir
144
self.gnupg.options.extra_args.extend(['--force-mdc',
145
'--quiet'])
146
186
self.gpg = "gpg"
187
try:
188
output = subprocess.check_output(["gpgconf"])
189
for line in output.splitlines():
190
name, text, path = line.split(b":")
191
if name == "gpg":
192
self.gpg = path
193
break
194
except OSError as e:
195
if e.errno != errno.ENOENT:
196
raise
197
self.gnupgargs = ['--batch',
198
'--homedir', self.tempdir,
199
'--force-mdc',
200
'--quiet']
201
# Only GPG version 1 has the --no-use-agent option.
202
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
203
self.gnupgargs.append("--no-use-agent")
204
147
205
def __enter__(self):
148
206
return self
149
150
def __exit__ (self, exc_type, exc_value, traceback):
207
208
def __exit__(self, exc_type, exc_value, traceback):
151
209
self._cleanup()
152
210
return False
153
211
154
212
def __del__(self):
155
213
self._cleanup()
156
214
157
215
def _cleanup(self):
158
216
if self.tempdir is not None:
159
217
# Delete contents of tempdir
160
218
for root, dirs, files in os.walk(self.tempdir,
161
topdown = False):
219
topdown=False):
162
220
for filename in files:
163
221
os.remove(os.path.join(root, filename))
164
222
for dirname in dirs:
166
224
# Remove tempdir
167
225
os.rmdir(self.tempdir)
168
226
self.tempdir = None
169
227
170
228
def password_encode(self, password):
171
229
# Passphrase can not be empty and can not contain newlines or
172
230
# NUL bytes. So we prefix it and hex encode it.
173
return b"mandos" + binascii.hexlify(password)
174
231
encoded = b"mandos" + binascii.hexlify(password)
232
if len(encoded) > 2048:
233
# GnuPG can't handle long passwords, so encode differently
234
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
235
.replace(b"\n", b"\\n")
236
.replace(b"\0", b"\\x00"))
237
return encoded
238
175
239
def encrypt(self, data, password):
176
self.gnupg.passphrase = self.password_encode(password)
177
with open(os.devnull) as devnull:
178
try:
179
proc = self.gnupg.run(['--symmetric'],
180
create_fhs=['stdin', 'stdout'],
181
attach_fhs={'stderr': devnull})
182
with contextlib.closing(proc.handles['stdin']) as f:
183
f.write(data)
184
with contextlib.closing(proc.handles['stdout']) as f:
185
ciphertext = f.read()
186
proc.wait()
187
except IOError as e:
188
raise PGPError(e)
189
self.gnupg.passphrase = None
240
passphrase = self.password_encode(password)
241
with tempfile.NamedTemporaryFile(
242
dir=self.tempdir) as passfile:
243
passfile.write(passphrase)
244
passfile.flush()
245
proc = subprocess.Popen([self.gpg, '--symmetric',
246
'--passphrase-file',
247
passfile.name]
248
+ self.gnupgargs,
249
stdin=subprocess.PIPE,
250
stdout=subprocess.PIPE,
251
stderr=subprocess.PIPE)
252
ciphertext, err = proc.communicate(input=data)
253
if proc.returncode != 0:
254
raise PGPError(err)
190
255
return ciphertext
191
256
192
257
def decrypt(self, data, password):
193
self.gnupg.passphrase = self.password_encode(password)
194
with open(os.devnull) as devnull:
195
try:
196
proc = self.gnupg.run(['--decrypt'],
197
create_fhs=['stdin', 'stdout'],
198
attach_fhs={'stderr': devnull})
199
with contextlib.closing(proc.handles['stdin'] ) as f:
200
f.write(data)
201
with contextlib.closing(proc.handles['stdout']) as f:
202
decrypted_plaintext = f.read()
203
proc.wait()
204
except IOError as e:
205
raise PGPError(e)
206
self.gnupg.passphrase = None
258
passphrase = self.password_encode(password)
259
with tempfile.NamedTemporaryFile(
260
dir=self.tempdir) as passfile:
261
passfile.write(passphrase)
262
passfile.flush()
263
proc = subprocess.Popen([self.gpg, '--decrypt',
264
'--passphrase-file',
265
passfile.name]
266
+ self.gnupgargs,
267
stdin=subprocess.PIPE,
268
stdout=subprocess.PIPE,
269
stderr=subprocess.PIPE)
270
decrypted_plaintext, err = proc.communicate(input=data)
271
if proc.returncode != 0:
272
raise PGPError(err)
207
273
return decrypted_plaintext
208
274
209
275
276
# Pretend that we have an Avahi module
277
class Avahi(object):
278
"""This isn't so much a class as it is a module-like namespace.
279
It is instantiated once, and simulates having an Avahi module."""
280
IF_UNSPEC = -1 # avahi-common/address.h
281
PROTO_UNSPEC = -1 # avahi-common/address.h
282
PROTO_INET = 0 # avahi-common/address.h
283
PROTO_INET6 = 1 # avahi-common/address.h
284
DBUS_NAME = "org.freedesktop.Avahi"
285
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
286
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
287
DBUS_PATH_SERVER = "/"
288
289
def string_array_to_txt_array(self, t):
290
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
291
for s in t), signature="ay")
292
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
293
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
294
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
295
SERVER_INVALID = 0 # avahi-common/defs.h
296
SERVER_REGISTERING = 1 # avahi-common/defs.h
297
SERVER_RUNNING = 2 # avahi-common/defs.h
298
SERVER_COLLISION = 3 # avahi-common/defs.h
299
SERVER_FAILURE = 4 # avahi-common/defs.h
300
avahi = Avahi()
301
210
302
211
303
class AvahiError(Exception):
212
304
def __init__(self, value, *args, **kwargs):
213
305
self.value = value
214
super(AvahiError, self).__init__(value, *args, **kwargs)
215
def __unicode__(self):
216
return unicode(repr(self.value))
306
return super(AvahiError, self).__init__(value, *args,
307
**kwargs)
308
217
309
218
310
class AvahiServiceError(AvahiError):
219
311
pass
220
312
313
221
314
class AvahiGroupError(AvahiError):
222
315
pass
223
316
224
317
225
318
class AvahiService(object):
226
319
"""An Avahi (Zeroconf) service.
227
320
228
321
Attributes:
229
322
interface: integer; avahi.IF_UNSPEC or an interface index.
230
323
Used to optionally bind to the specified interface.
231
324
name: string; Example: 'Mandos'
232
325
type: string; Example: '_mandos._tcp'.
233
See <http://www.dns-sd.org/ServiceTypes.html>
326
See <https://www.iana.org/assignments/service-names-port-numbers>
234
327
port: integer; what port to announce
235
328
TXT: list of strings; TXT record for the service
236
329
domain: string; Domain to publish on, default to .local if empty.
242
335
server: D-Bus Server
243
336
bus: dbus.SystemBus()
244
337
"""
245
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
246
servicetype = None, port = None, TXT = None,
247
domain = "", host = "", max_renames = 32768,
248
protocol = avahi.PROTO_UNSPEC, bus = None):
338
339
def __init__(self,
340
interface=avahi.IF_UNSPEC,
341
name=None,
342
servicetype=None,
343
port=None,
344
TXT=None,
345
domain="",
346
host="",
347
max_renames=32768,
348
protocol=avahi.PROTO_UNSPEC,
349
bus=None):
249
350
self.interface = interface
250
351
self.name = name
251
352
self.type = servicetype
260
361
self.server = None
261
362
self.bus = bus
262
363
self.entry_group_state_changed_match = None
263
def rename(self):
364
365
def rename(self, remove=True):
264
366
"""Derived from the Avahi example code"""
265
367
if self.rename_count >= self.max_renames:
266
368
logger.critical("No suitable Zeroconf service name found"
267
369
" after %i retries, exiting.",
268
370
self.rename_count)
269
371
raise AvahiServiceError("Too many renames")
270
self.name = unicode(self.server
271
.GetAlternativeServiceName(self.name))
372
self.name = str(
373
self.server.GetAlternativeServiceName(self.name))
374
self.rename_count += 1
272
375
logger.info("Changing Zeroconf service name to %r ...",
273
376
self.name)
274
self.remove()
377
if remove:
378
self.remove()
275
379
try:
276
380
self.add()
277
381
except dbus.exceptions.DBusException as error:
278
logger.critical("DBusException: %s", error)
279
self.cleanup()
280
os._exit(1)
281
self.rename_count += 1
382
if (error.get_dbus_name()
383
== "org.freedesktop.Avahi.CollisionError"):
384
logger.info("Local Zeroconf service name collision.")
385
return self.rename(remove=False)
386
else:
387
logger.critical("D-Bus Exception", exc_info=error)
388
self.cleanup()
389
os._exit(1)
390
282
391
def remove(self):
283
392
"""Derived from the Avahi example code"""
284
393
if self.entry_group_state_changed_match is not None:
286
395
self.entry_group_state_changed_match = None
287
396
if self.group is not None:
288
397
self.group.Reset()
398
289
399
def add(self):
290
400
"""Derived from the Avahi example code"""
291
401
self.remove()
308
418
dbus.UInt16(self.port),
309
419
avahi.string_array_to_txt_array(self.TXT))
310
420
self.group.Commit()
421
311
422
def entry_group_state_changed(self, state, error):
312
423
"""Derived from the Avahi example code"""
313
424
logger.debug("Avahi entry group state change: %i", state)
314
425
315
426
if state == avahi.ENTRY_GROUP_ESTABLISHED:
316
427
logger.debug("Zeroconf service established.")
317
428
elif state == avahi.ENTRY_GROUP_COLLISION:
319
430
self.rename()
320
431
elif state == avahi.ENTRY_GROUP_FAILURE:
321
432
logger.critical("Avahi: Error in group state changed %s",
322
unicode(error))
323
raise AvahiGroupError("State changed: %s"
324
% unicode(error))
433
str(error))
434
raise AvahiGroupError("State changed: {!s}".format(error))
435
325
436
def cleanup(self):
326
437
"""Derived from the Avahi example code"""
327
438
if self.group is not None:
332
443
pass
333
444
self.group = None
334
445
self.remove()
446
335
447
def server_state_changed(self, state, error=None):
336
448
"""Derived from the Avahi example code"""
337
449
logger.debug("Avahi server state change: %i", state)
338
bad_states = { avahi.SERVER_INVALID:
339
"Zeroconf server invalid",
340
avahi.SERVER_REGISTERING: None,
341
avahi.SERVER_COLLISION:
342
"Zeroconf server name collision",
343
avahi.SERVER_FAILURE:
344
"Zeroconf server failure" }
450
bad_states = {
451
avahi.SERVER_INVALID: "Zeroconf server invalid",
452
avahi.SERVER_REGISTERING: None,
453
avahi.SERVER_COLLISION: "Zeroconf server name collision",
454
avahi.SERVER_FAILURE: "Zeroconf server failure",
455
}
345
456
if state in bad_states:
346
457
if bad_states[state] is not None:
347
458
if error is None:
350
461
logger.error(bad_states[state] + ": %r", error)
351
462
self.cleanup()
352
463
elif state == avahi.SERVER_RUNNING:
353
self.add()
464
try:
465
self.add()
466
except dbus.exceptions.DBusException as error:
467
if (error.get_dbus_name()
468
== "org.freedesktop.Avahi.CollisionError"):
469
logger.info("Local Zeroconf service name"
470
" collision.")
471
return self.rename(remove=False)
472
else:
473
logger.critical("D-Bus Exception", exc_info=error)
474
self.cleanup()
475
os._exit(1)
354
476
else:
355
477
if error is None:
356
478
logger.debug("Unknown state: %r", state)
357
479
else:
358
480
logger.debug("Unknown state: %r: %r", state, error)
481
359
482
def activate(self):
360
483
"""Derived from the Avahi example code"""
361
484
if self.server is None:
365
488
follow_name_owner_changes=True),
366
489
avahi.DBUS_INTERFACE_SERVER)
367
490
self.server.connect_to_signal("StateChanged",
368
self.server_state_changed)
491
self.server_state_changed)
369
492
self.server_state_changed(self.server.GetState())
370
493
494
371
495
class AvahiServiceToSyslog(AvahiService):
372
def rename(self):
496
def rename(self, *args, **kwargs):
373
497
"""Add the new name to the syslog messages"""
374
ret = AvahiService.rename(self)
375
syslogger.setFormatter(logging.Formatter
376
('Mandos (%s) [%%(process)d]:'
377
' %%(levelname)s: %%(message)s'
378
% self.name))
498
ret = AvahiService.rename(self, *args, **kwargs)
499
syslogger.setFormatter(logging.Formatter(
500
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
501
.format(self.name)))
379
502
return ret
380
503
381
def timedelta_to_milliseconds(td):
382
"Convert a datetime.timedelta() to milliseconds"
383
return ((td.days * 24 * 60 * 60 * 1000)
384
+ (td.seconds * 1000)
385
+ (td.microseconds // 1000))
386
504
505
# Pretend that we have a GnuTLS module
506
class GnuTLS(object):
507
"""This isn't so much a class as it is a module-like namespace.
508
It is instantiated once, and simulates having a GnuTLS module."""
509
510
library = ctypes.util.find_library("gnutls")
511
if library is None:
512
library = ctypes.util.find_library("gnutls-deb0")
513
_library = ctypes.cdll.LoadLibrary(library)
514
del library
515
_need_version = b"3.3.0"
516
517
def __init__(self):
518
# Need to use class name "GnuTLS" here, since this method is
519
# called before the assignment to the "gnutls" global variable
520
# happens.
521
if GnuTLS.check_version(self._need_version) is None:
522
raise GnuTLS.Error("Needs GnuTLS {} or later"
523
.format(self._need_version))
524
525
# Unless otherwise indicated, the constants and types below are
526
# all from the gnutls/gnutls.h C header file.
527
528
# Constants
529
E_SUCCESS = 0
530
E_INTERRUPTED = -52
531
E_AGAIN = -28
532
CRT_OPENPGP = 2
533
CLIENT = 2
534
SHUT_RDWR = 0
535
CRD_CERTIFICATE = 1
536
E_NO_CERTIFICATE_FOUND = -49
537
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
538
539
# Types
540
class session_int(ctypes.Structure):
541
_fields_ = []
542
session_t = ctypes.POINTER(session_int)
543
544
class certificate_credentials_st(ctypes.Structure):
545
_fields_ = []
546
certificate_credentials_t = ctypes.POINTER(
547
certificate_credentials_st)
548
certificate_type_t = ctypes.c_int
549
550
class datum_t(ctypes.Structure):
551
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
552
('size', ctypes.c_uint)]
553
554
class openpgp_crt_int(ctypes.Structure):
555
_fields_ = []
556
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
557
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
558
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
559
credentials_type_t = ctypes.c_int
560
transport_ptr_t = ctypes.c_void_p
561
close_request_t = ctypes.c_int
562
563
# Exceptions
564
class Error(Exception):
565
# We need to use the class name "GnuTLS" here, since this
566
# exception might be raised from within GnuTLS.__init__,
567
# which is called before the assignment to the "gnutls"
568
# global variable has happened.
569
def __init__(self, message=None, code=None, args=()):
570
# Default usage is by a message string, but if a return
571
# code is passed, convert it to a string with
572
# gnutls.strerror()
573
self.code = code
574
if message is None and code is not None:
575
message = GnuTLS.strerror(code)
576
return super(GnuTLS.Error, self).__init__(
577
message, *args)
578
579
class CertificateSecurityError(Error):
580
pass
581
582
# Classes
583
class Credentials(object):
584
def __init__(self):
585
self._c_object = gnutls.certificate_credentials_t()
586
gnutls.certificate_allocate_credentials(
587
ctypes.byref(self._c_object))
588
self.type = gnutls.CRD_CERTIFICATE
589
590
def __del__(self):
591
gnutls.certificate_free_credentials(self._c_object)
592
593
class ClientSession(object):
594
def __init__(self, socket, credentials=None):
595
self._c_object = gnutls.session_t()
596
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
597
gnutls.set_default_priority(self._c_object)
598
gnutls.transport_set_ptr(self._c_object, socket.fileno())
599
gnutls.handshake_set_private_extensions(self._c_object,
600
True)
601
self.socket = socket
602
if credentials is None:
603
credentials = gnutls.Credentials()
604
gnutls.credentials_set(self._c_object, credentials.type,
605
ctypes.cast(credentials._c_object,
606
ctypes.c_void_p))
607
self.credentials = credentials
608
609
def __del__(self):
610
gnutls.deinit(self._c_object)
611
612
def handshake(self):
613
return gnutls.handshake(self._c_object)
614
615
def send(self, data):
616
data = bytes(data)
617
data_len = len(data)
618
while data_len > 0:
619
data_len -= gnutls.record_send(self._c_object,
620
data[-data_len:],
621
data_len)
622
623
def bye(self):
624
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
625
626
# Error handling functions
627
def _error_code(result):
628
"""A function to raise exceptions on errors, suitable
629
for the 'restype' attribute on ctypes functions"""
630
if result >= 0:
631
return result
632
if result == gnutls.E_NO_CERTIFICATE_FOUND:
633
raise gnutls.CertificateSecurityError(code=result)
634
raise gnutls.Error(code=result)
635
636
def _retry_on_error(result, func, arguments):
637
"""A function to retry on some errors, suitable
638
for the 'errcheck' attribute on ctypes functions"""
639
while result < 0:
640
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
641
return _error_code(result)
642
result = func(*arguments)
643
return result
644
645
# Unless otherwise indicated, the function declarations below are
646
# all from the gnutls/gnutls.h C header file.
647
648
# Functions
649
priority_set_direct = _library.gnutls_priority_set_direct
650
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
651
ctypes.POINTER(ctypes.c_char_p)]
652
priority_set_direct.restype = _error_code
653
654
init = _library.gnutls_init
655
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
656
init.restype = _error_code
657
658
set_default_priority = _library.gnutls_set_default_priority
659
set_default_priority.argtypes = [session_t]
660
set_default_priority.restype = _error_code
661
662
record_send = _library.gnutls_record_send
663
record_send.argtypes = [session_t, ctypes.c_void_p,
664
ctypes.c_size_t]
665
record_send.restype = ctypes.c_ssize_t
666
record_send.errcheck = _retry_on_error
667
668
certificate_allocate_credentials = (
669
_library.gnutls_certificate_allocate_credentials)
670
certificate_allocate_credentials.argtypes = [
671
ctypes.POINTER(certificate_credentials_t)]
672
certificate_allocate_credentials.restype = _error_code
673
674
certificate_free_credentials = (
675
_library.gnutls_certificate_free_credentials)
676
certificate_free_credentials.argtypes = [
677
certificate_credentials_t]
678
certificate_free_credentials.restype = None
679
680
handshake_set_private_extensions = (
681
_library.gnutls_handshake_set_private_extensions)
682
handshake_set_private_extensions.argtypes = [session_t,
683
ctypes.c_int]
684
handshake_set_private_extensions.restype = None
685
686
credentials_set = _library.gnutls_credentials_set
687
credentials_set.argtypes = [session_t, credentials_type_t,
688
ctypes.c_void_p]
689
credentials_set.restype = _error_code
690
691
strerror = _library.gnutls_strerror
692
strerror.argtypes = [ctypes.c_int]
693
strerror.restype = ctypes.c_char_p
694
695
certificate_type_get = _library.gnutls_certificate_type_get
696
certificate_type_get.argtypes = [session_t]
697
certificate_type_get.restype = _error_code
698
699
certificate_get_peers = _library.gnutls_certificate_get_peers
700
certificate_get_peers.argtypes = [session_t,
701
ctypes.POINTER(ctypes.c_uint)]
702
certificate_get_peers.restype = ctypes.POINTER(datum_t)
703
704
global_set_log_level = _library.gnutls_global_set_log_level
705
global_set_log_level.argtypes = [ctypes.c_int]
706
global_set_log_level.restype = None
707
708
global_set_log_function = _library.gnutls_global_set_log_function
709
global_set_log_function.argtypes = [log_func]
710
global_set_log_function.restype = None
711
712
deinit = _library.gnutls_deinit
713
deinit.argtypes = [session_t]
714
deinit.restype = None
715
716
handshake = _library.gnutls_handshake
717
handshake.argtypes = [session_t]
718
handshake.restype = _error_code
719
handshake.errcheck = _retry_on_error
720
721
transport_set_ptr = _library.gnutls_transport_set_ptr
722
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
723
transport_set_ptr.restype = None
724
725
bye = _library.gnutls_bye
726
bye.argtypes = [session_t, close_request_t]
727
bye.restype = _error_code
728
bye.errcheck = _retry_on_error
729
730
check_version = _library.gnutls_check_version
731
check_version.argtypes = [ctypes.c_char_p]
732
check_version.restype = ctypes.c_char_p
733
734
# All the function declarations below are from gnutls/openpgp.h
735
736
openpgp_crt_init = _library.gnutls_openpgp_crt_init
737
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
738
openpgp_crt_init.restype = _error_code
739
740
openpgp_crt_import = _library.gnutls_openpgp_crt_import
741
openpgp_crt_import.argtypes = [openpgp_crt_t,
742
ctypes.POINTER(datum_t),
743
openpgp_crt_fmt_t]
744
openpgp_crt_import.restype = _error_code
745
746
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
747
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
748
ctypes.POINTER(ctypes.c_uint)]
749
openpgp_crt_verify_self.restype = _error_code
750
751
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
752
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
753
openpgp_crt_deinit.restype = None
754
755
openpgp_crt_get_fingerprint = (
756
_library.gnutls_openpgp_crt_get_fingerprint)
757
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
758
ctypes.c_void_p,
759
ctypes.POINTER(
760
ctypes.c_size_t)]
761
openpgp_crt_get_fingerprint.restype = _error_code
762
763
# Remove non-public functions
764
del _error_code, _retry_on_error
765
# Create the global "gnutls" object, simulating a module
766
gnutls = GnuTLS()
767
768
769
def call_pipe(connection, # : multiprocessing.Connection
770
func, *args, **kwargs):
771
"""This function is meant to be called by multiprocessing.Process
772
773
This function runs func(*args, **kwargs), and writes the resulting
774
return value on the provided multiprocessing.Connection.
775
"""
776
connection.send(func(*args, **kwargs))
777
connection.close()
778
779
387
780
class Client(object):
388
781
"""A representation of a client host served by this server.
389
782
390
783
Attributes:
391
784
approved: bool(); 'None' if not yet approved/disapproved
392
785
approval_delay: datetime.timedelta(); Time to wait for approval
394
787
checker: subprocess.Popen(); a running checker process used
395
788
to see if the client lives.
396
789
'None' if no process is running.
397
checker_callback_tag: a gobject event source tag, or None
790
checker_callback_tag: a GLib event source tag, or None
398
791
checker_command: string; External command which is run to check
399
792
if client lives. %() expansions are done at
400
793
runtime with vars(self) as dict, so that for
401
794
instance %(name)s can be used in the command.
402
checker_initiator_tag: a gobject event source tag, or None
795
checker_initiator_tag: a GLib event source tag, or None
403
796
created: datetime.datetime(); (UTC) object creation
404
797
client_structure: Object describing what attributes a client has
405
798
and is used for storing the client at exit
406
799
current_checker_command: string; current running checker_command
407
disable_initiator_tag: a gobject event source tag, or None
800
disable_initiator_tag: a GLib event source tag, or None
408
801
enabled: bool()
409
802
fingerprint: string (40 or 32 hexadecimal digits); used to
410
803
uniquely identify the client
414
807
last_checked_ok: datetime.datetime(); (UTC) or None
415
808
last_checker_status: integer between 0 and 255 reflecting exit
416
809
status of last checker. -1 reflects crashed
417
checker, or None.
810
checker, -2 means no checker completed yet.
811
last_checker_signal: The signal which killed the last checker, if
812
last_checker_status is -1
418
813
last_enabled: datetime.datetime(); (UTC) or None
419
814
name: string; from the config file, used in log messages and
420
815
D-Bus identifiers
421
816
secret: bytestring; sent verbatim (over TLS) to client
422
817
timeout: datetime.timedelta(); How long from last_checked_ok
423
818
until this client is disabled
424
extended_timeout: extra long timeout when password has been sent
819
extended_timeout: extra long timeout when secret has been sent
425
820
runtime_expansions: Allowed attributes for runtime expansion.
426
821
expires: datetime.datetime(); time (UTC) when a client will be
427
822
disabled, or None
823
server_settings: The server_settings dict from main()
428
824
"""
429
825
430
826
runtime_expansions = ("approval_delay", "approval_duration",
431
"created", "enabled", "fingerprint",
432
"host", "interval", "last_checked_ok",
827
"created", "enabled", "expires",
828
"fingerprint", "host", "interval",
829
"last_approval_request", "last_checked_ok",
433
830
"last_enabled", "name", "timeout")
434
client_defaults = { "timeout": "5m",
435
"extended_timeout": "15m",
436
"interval": "2m",
437
"checker": "fping -q -- %%(host)s",
438
"host": "",
439
"approval_delay": "0s",
440
"approval_duration": "1s",
441
"approved_by_default": "True",
442
"enabled": "True",
443
}
444
445
def timeout_milliseconds(self):
446
"Return the 'timeout' attribute in milliseconds"
447
return timedelta_to_milliseconds(self.timeout)
448
449
def extended_timeout_milliseconds(self):
450
"Return the 'extended_timeout' attribute in milliseconds"
451
return timedelta_to_milliseconds(self.extended_timeout)
452
453
def interval_milliseconds(self):
454
"Return the 'interval' attribute in milliseconds"
455
return timedelta_to_milliseconds(self.interval)
456
457
def approval_delay_milliseconds(self):
458
return timedelta_to_milliseconds(self.approval_delay)
831
client_defaults = {
832
"timeout": "PT5M",
833
"extended_timeout": "PT15M",
834
"interval": "PT2M",
835
"checker": "fping -q -- %%(host)s",
836
"host": "",
837
"approval_delay": "PT0S",
838
"approval_duration": "PT1S",
839
"approved_by_default": "True",
840
"enabled": "True",
841
}
459
842
460
843
@staticmethod
461
844
def config_parser(config):
462
""" Construct a new dict of client settings of this form:
845
"""Construct a new dict of client settings of this form:
463
846
{ client_name: {setting_name: value, ...}, ...}
464
with exceptions for any special settings as defined above"""
847
with exceptions for any special settings as defined above.
848
NOTE: Must be a pure function. Must return the same result
849
value given the same arguments.
850
"""
465
851
settings = {}
466
852
for client_name in config.sections():
467
853
section = dict(config.items(client_name))
468
854
client = settings[client_name] = {}
469
855
470
856
client["host"] = section["host"]
471
857
# Reformat values from string types to Python types
472
858
client["approved_by_default"] = config.getboolean(
473
859
client_name, "approved_by_default")
474
client["enabled"] = config.getboolean(client_name, "enabled")
475
860
client["enabled"] = config.getboolean(client_name,
861
"enabled")
862
863
# Uppercase and remove spaces from fingerprint for later
864
# comparison purposes with return value from the
865
# fingerprint() function
476
866
client["fingerprint"] = (section["fingerprint"].upper()
477
867
.replace(" ", ""))
478
868
if "secret" in section:
479
client["secret"] = section["secret"].decode("base64")
869
client["secret"] = codecs.decode(section["secret"]
870
.encode("utf-8"),
871
"base64")
480
872
elif "secfile" in section:
481
873
with open(os.path.expanduser(os.path.expandvars
482
874
(section["secfile"])),
483
875
"rb") as secfile:
484
876
client["secret"] = secfile.read()
485
877
else:
486
raise TypeError("No secret or secfile for section %s"
487
% section)
878
raise TypeError("No secret or secfile for section {}"
879
.format(section))
488
880
client["timeout"] = string_to_delta(section["timeout"])
489
881
client["extended_timeout"] = string_to_delta(
490
882
section["extended_timeout"])
496
888
client["checker_command"] = section["checker"]
497
889
client["last_approval_request"] = None
498
890
client["last_checked_ok"] = None
499
client["last_checker_status"] = None
500
if client["enabled"]:
501
client["last_enabled"] = datetime.datetime.utcnow()
502
client["expires"] = (datetime.datetime.utcnow()
503
+ client["timeout"])
504
else:
505
client["last_enabled"] = None
506
client["expires"] = None
891
client["last_checker_status"] = -2
507
892
508
893
return settings
509
510
511
def __init__(self, settings, name = None):
512
"""Note: the 'checker' key in 'config' sets the
513
'checker_command' attribute and *not* the 'checker'
514
attribute."""
894
895
def __init__(self, settings, name=None, server_settings=None):
515
896
self.name = name
897
if server_settings is None:
898
server_settings = {}
899
self.server_settings = server_settings
516
900
# adding all client settings
517
for setting, value in settings.iteritems():
901
for setting, value in settings.items():
518
902
setattr(self, setting, value)
519
903
904
if self.enabled:
905
if not hasattr(self, "last_enabled"):
906
self.last_enabled = datetime.datetime.utcnow()
907
if not hasattr(self, "expires"):
908
self.expires = (datetime.datetime.utcnow()
909
+ self.timeout)
910
else:
911
self.last_enabled = None
912
self.expires = None
913
520
914
logger.debug("Creating client %r", self.name)
521
# Uppercase and remove spaces from fingerprint for later
522
# comparison purposes with return value from the fingerprint()
523
# function
524
915
logger.debug(" Fingerprint: %s", self.fingerprint)
525
self.created = settings.get("created", datetime.datetime.utcnow())
916
self.created = settings.get("created",
917
datetime.datetime.utcnow())
526
918
527
919
# attributes specific for this server instance
528
920
self.checker = None
532
924
self.current_checker_command = None
533
925
self.approved = None
534
926
self.approvals_pending = 0
535
self.changedstate = (multiprocessing_manager
536
.Condition(multiprocessing_manager
537
.Lock()))
538
self.client_structure = [attr for attr in
539
self.__dict__.iterkeys()
927
self.changedstate = multiprocessing_manager.Condition(
928
multiprocessing_manager.Lock())
929
self.client_structure = [attr
930
for attr in self.__dict__.keys()
540
931
if not attr.startswith("_")]
541
932
self.client_structure.append("client_structure")
542
543
for name, t in inspect.getmembers(type(self),
544
lambda obj:
545
isinstance(obj,
546
property)):
933
934
for name, t in inspect.getmembers(
935
type(self), lambda obj: isinstance(obj, property)):
547
936
if not name.startswith("_"):
548
937
self.client_structure.append(name)
549
938
550
939
# Send notice to process children that client state has changed
551
940
def send_changedstate(self):
552
941
with self.changedstate:
553
942
self.changedstate.notify_all()
554
943
555
944
def enable(self):
556
945
"""Start this client's checker and timeout hooks"""
557
946
if getattr(self, "enabled", False):
558
947
# Already enabled
559
948
return
560
self.send_changedstate()
561
949
self.expires = datetime.datetime.utcnow() + self.timeout
562
950
self.enabled = True
563
951
self.last_enabled = datetime.datetime.utcnow()
564
952
self.init_checker()
565
953
self.send_changedstate()
954
566
955
def disable(self, quiet=True):
567
956
"""Disable this client."""
568
957
if not getattr(self, "enabled", False):
569
958
return False
570
959
if not quiet:
571
self.send_changedstate()
572
if not quiet:
573
960
logger.info("Disabling client %s", self.name)
574
if getattr(self, "disable_initiator_tag", False):
575
gobject.source_remove(self.disable_initiator_tag)
961
if getattr(self, "disable_initiator_tag", None) is not None:
962
GLib.source_remove(self.disable_initiator_tag)
576
963
self.disable_initiator_tag = None
577
964
self.expires = None
578
if getattr(self, "checker_initiator_tag", False):
579
gobject.source_remove(self.checker_initiator_tag)
965
if getattr(self, "checker_initiator_tag", None) is not None:
966
GLib.source_remove(self.checker_initiator_tag)
580
967
self.checker_initiator_tag = None
581
968
self.stop_checker()
582
969
self.enabled = False
583
# Do not run this again if called by a gobject.timeout_add
970
if not quiet:
971
self.send_changedstate()
972
# Do not run this again if called by a GLib.timeout_add
584
973
return False
585
974
586
975
def __del__(self):
587
976
self.disable()
588
977
589
978
def init_checker(self):
590
979
# Schedule a new checker to be started an 'interval' from now,
591
980
# and every interval from then on.
592
self.checker_initiator_tag = (gobject.timeout_add
593
(self.interval_milliseconds(),
594
self.start_checker))
981
if self.checker_initiator_tag is not None:
982
GLib.source_remove(self.checker_initiator_tag)
983
self.checker_initiator_tag = GLib.timeout_add(
984
int(self.interval.total_seconds() * 1000),
985
self.start_checker)
595
986
# Schedule a disable() when 'timeout' has passed
596
self.disable_initiator_tag = (gobject.timeout_add
597
(self.timeout_milliseconds(),
598
self.disable))
987
if self.disable_initiator_tag is not None:
988
GLib.source_remove(self.disable_initiator_tag)
989
self.disable_initiator_tag = GLib.timeout_add(
990
int(self.timeout.total_seconds() * 1000), self.disable)
599
991
# Also start a new checker *right now*.
600
992
self.start_checker()
601
602
def checker_callback(self, pid, condition, command):
993
994
def checker_callback(self, source, condition, connection,
995
command):
603
996
"""The checker has completed, so take appropriate actions."""
604
997
self.checker_callback_tag = None
605
998
self.checker = None
606
if os.WIFEXITED(condition):
607
self.last_checker_status = os.WEXITSTATUS(condition)
999
# Read return code from connection (see call_pipe)
1000
returncode = connection.recv()
1001
connection.close()
1002
1003
if returncode >= 0:
1004
self.last_checker_status = returncode
1005
self.last_checker_signal = None
608
1006
if self.last_checker_status == 0:
609
1007
logger.info("Checker for %(name)s succeeded",
610
1008
vars(self))
611
1009
self.checked_ok()
612
1010
else:
613
logger.info("Checker for %(name)s failed",
614
vars(self))
1011
logger.info("Checker for %(name)s failed", vars(self))
615
1012
else:
616
1013
self.last_checker_status = -1
1014
self.last_checker_signal = -returncode
617
1015
logger.warning("Checker for %(name)s crashed?",
618
1016
vars(self))
619
620
def checked_ok(self, timeout=None):
621
"""Bump up the timeout for this client.
622
623
This should only be called when the client has been seen,
624
alive and well.
625
"""
1017
return False
1018
1019
def checked_ok(self):
1020
"""Assert that the client has been seen, alive and well."""
1021
self.last_checked_ok = datetime.datetime.utcnow()
1022
self.last_checker_status = 0
1023
self.last_checker_signal = None
1024
self.bump_timeout()
1025
1026
def bump_timeout(self, timeout=None):
1027
"""Bump up the timeout for this client."""
626
1028
if timeout is None:
627
1029
timeout = self.timeout
628
self.last_checked_ok = datetime.datetime.utcnow()
629
1030
if self.disable_initiator_tag is not None:
630
gobject.source_remove(self.disable_initiator_tag)
1031
GLib.source_remove(self.disable_initiator_tag)
1032
self.disable_initiator_tag = None
631
1033
if getattr(self, "enabled", False):
632
self.disable_initiator_tag = (gobject.timeout_add
633
(timedelta_to_milliseconds
634
(timeout), self.disable))
1034
self.disable_initiator_tag = GLib.timeout_add(
1035
int(timeout.total_seconds() * 1000), self.disable)
635
1036
self.expires = datetime.datetime.utcnow() + timeout
636
1037
637
1038
def need_approval(self):
638
1039
self.last_approval_request = datetime.datetime.utcnow()
639
1040
640
1041
def start_checker(self):
641
1042
"""Start a new checker subprocess if one is not running.
642
1043
643
1044
If a checker already exists, leave it running and do
644
1045
nothing."""
645
1046
# The reason for not killing a running checker is that if we
646
# did that, then if a checker (for some reason) started
647
# running slowly and taking more than 'interval' time, the
648
# client would inevitably timeout, since no checker would get
649
# a chance to run to completion. If we instead leave running
1047
# did that, and if a checker (for some reason) started running
1048
# slowly and taking more than 'interval' time, then the client
1049
# would inevitably timeout, since no checker would get a
1050
# chance to run to completion. If we instead leave running
650
1051
# checkers alone, the checker would have to take more time
651
1052
# than 'timeout' for the client to be disabled, which is as it
652
1053
# should be.
653
654
# If a checker exists, make sure it is not a zombie
655
try:
656
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
657
except (AttributeError, OSError) as error:
658
if (isinstance(error, OSError)
659
and error.errno != errno.ECHILD):
660
raise error
661
else:
662
if pid:
663
logger.warning("Checker was a zombie")
664
gobject.source_remove(self.checker_callback_tag)
665
self.checker_callback(pid, status,
666
self.current_checker_command)
1054
1055
if self.checker is not None and not self.checker.is_alive():
1056
logger.warning("Checker was not alive; joining")
1057
self.checker.join()
1058
self.checker = None
667
1059
# Start a new checker if needed
668
1060
if self.checker is None:
1061
# Escape attributes for the shell
1062
escaped_attrs = {
1063
attr: re.escape(str(getattr(self, attr)))
1064
for attr in self.runtime_expansions}
669
1065
try:
670
# In case checker_command has exactly one % operator
671
command = self.checker_command % self.host
672
except TypeError:
673
# Escape attributes for the shell
674
escaped_attrs = dict(
675
(attr,
676
re.escape(unicode(str(getattr(self, attr, "")),
677
errors=
678
'replace')))
679
for attr in
680
self.runtime_expansions)
681
682
try:
683
command = self.checker_command % escaped_attrs
684
except TypeError as error:
685
logger.error('Could not format string "%s":'
686
' %s', self.checker_command, error)
687
return True # Try again later
1066
command = self.checker_command % escaped_attrs
1067
except TypeError as error:
1068
logger.error('Could not format string "%s"',
1069
self.checker_command,
1070
exc_info=error)
1071
return True # Try again later
688
1072
self.current_checker_command = command
689
try:
690
logger.info("Starting checker %r for %s",
691
command, self.name)
692
# We don't need to redirect stdout and stderr, since
693
# in normal mode, that is already done by daemon(),
694
# and in debug mode we don't want to. (Stdin is
695
# always replaced by /dev/null.)
696
self.checker = subprocess.Popen(command,
697
close_fds=True,
698
shell=True, cwd="/")
699
self.checker_callback_tag = (gobject.child_watch_add
700
(self.checker.pid,
701
self.checker_callback,
702
data=command))
703
# The checker may have completed before the gobject
704
# watch was added. Check for this.
705
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
706
if pid:
707
gobject.source_remove(self.checker_callback_tag)
708
self.checker_callback(pid, status, command)
709
except OSError as error:
710
logger.error("Failed to start subprocess: %s",
711
error)
712
# Re-run this periodically if run by gobject.timeout_add
1073
logger.info("Starting checker %r for %s", command,
1074
self.name)
1075
# We don't need to redirect stdout and stderr, since
1076
# in normal mode, that is already done by daemon(),
1077
# and in debug mode we don't want to. (Stdin is
1078
# always replaced by /dev/null.)
1079
# The exception is when not debugging but nevertheless
1080
# running in the foreground; use the previously
1081
# created wnull.
1082
popen_args = {"close_fds": True,
1083
"shell": True,
1084
"cwd": "/"}
1085
if (not self.server_settings["debug"]
1086
and self.server_settings["foreground"]):
1087
popen_args.update({"stdout": wnull,
1088
"stderr": wnull})
1089
pipe = multiprocessing.Pipe(duplex=False)
1090
self.checker = multiprocessing.Process(
1091
target=call_pipe,
1092
args=(pipe[1], subprocess.call, command),
1093
kwargs=popen_args)
1094
self.checker.start()
1095
self.checker_callback_tag = GLib.io_add_watch(
1096
pipe[0].fileno(), GLib.IO_IN,
1097
self.checker_callback, pipe[0], command)
1098
# Re-run this periodically if run by GLib.timeout_add
713
1099
return True
714
1100
715
1101
def stop_checker(self):
716
1102
"""Force the checker process, if any, to stop."""
717
1103
if self.checker_callback_tag:
718
gobject.source_remove(self.checker_callback_tag)
1104
GLib.source_remove(self.checker_callback_tag)
719
1105
self.checker_callback_tag = None
720
1106
if getattr(self, "checker", None) is None:
721
1107
return
722
1108
logger.debug("Stopping checker for %(name)s", vars(self))
723
try:
724
os.kill(self.checker.pid, signal.SIGTERM)
725
#time.sleep(0.5)
726
#if self.checker.poll() is None:
727
# os.kill(self.checker.pid, signal.SIGKILL)
728
except OSError as error:
729
if error.errno != errno.ESRCH: # No such process
730
raise
1109
self.checker.terminate()
731
1110
self.checker = None
732
1111
733
1112
734
def dbus_service_property(dbus_interface, signature="v",
735
access="readwrite", byte_arrays=False):
1113
def dbus_service_property(dbus_interface,
1114
signature="v",
1115
access="readwrite",
1116
byte_arrays=False):
736
1117
"""Decorators for marking methods of a DBusObjectWithProperties to
737
1118
become properties on the D-Bus.
738
1119
739
1120
The decorated method will be called with no arguments by "Get"
740
1121
and with one argument by "Set".
741
1122
742
1123
The parameters, where they are supported, are the same as
743
1124
dbus.service.method, except there is only "signature", since the
744
1125
type from Get() and the type sent to Set() is the same.
747
1128
# "Set" method, so we fail early here:
748
1129
if byte_arrays and signature != "ay":
749
1130
raise ValueError("Byte arrays not supported for non-'ay'"
750
" signature %r" % signature)
1131
" signature {!r}".format(signature))
1132
751
1133
def decorator(func):
752
1134
func._dbus_is_property = True
753
1135
func._dbus_interface = dbus_interface
756
1138
func._dbus_name = func.__name__
757
1139
if func._dbus_name.endswith("_dbus_property"):
758
1140
func._dbus_name = func._dbus_name[:-14]
759
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
760
return func
1141
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1142
return func
1143
1144
return decorator
1145
1146
1147
def dbus_interface_annotations(dbus_interface):
1148
"""Decorator for marking functions returning interface annotations
1149
1150
Usage:
1151
1152
@dbus_interface_annotations("org.example.Interface")
1153
def _foo(self): # Function name does not matter
1154
return {"org.freedesktop.DBus.Deprecated": "true",
1155
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1156
"false"}
1157
"""
1158
1159
def decorator(func):
1160
func._dbus_is_interface = True
1161
func._dbus_interface = dbus_interface
1162
func._dbus_name = dbus_interface
1163
return func
1164
1165
return decorator
1166
1167
1168
def dbus_annotations(annotations):
1169
"""Decorator to annotate D-Bus methods, signals or properties
1170
Usage:
1171
1172
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1173
"org.freedesktop.DBus.Property."
1174
"EmitsChangedSignal": "false"})
1175
@dbus_service_property("org.example.Interface", signature="b",
1176
access="r")
1177
def Property_dbus_property(self):
1178
return dbus.Boolean(False)
1179
1180
See also the DBusObjectWithAnnotations class.
1181
"""
1182
1183
def decorator(func):
1184
func._dbus_annotations = annotations
1185
return func
1186
761
1187
return decorator
762
1188
763
1189
764
1190
class DBusPropertyException(dbus.exceptions.DBusException):
765
1191
"""A base class for D-Bus property-related exceptions
766
1192
"""
767
def __unicode__(self):
768
return unicode(str(self))
1193
pass
769
1194
770
1195
771
1196
class DBusPropertyAccessException(DBusPropertyException):
780
1205
pass
781
1206
782
1207
783
class DBusObjectWithProperties(dbus.service.Object):
1208
class DBusObjectWithAnnotations(dbus.service.Object):
1209
"""A D-Bus object with annotations.
1210
1211
Classes inheriting from this can use the dbus_annotations
1212
decorator to add annotations to methods or signals.
1213
"""
1214
1215
@staticmethod
1216
def _is_dbus_thing(thing):
1217
"""Returns a function testing if an attribute is a D-Bus thing
1218
1219
If called like _is_dbus_thing("method") it returns a function
1220
suitable for use as predicate to inspect.getmembers().
1221
"""
1222
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1223
False)
1224
1225
def _get_all_dbus_things(self, thing):
1226
"""Returns a generator of (name, attribute) pairs
1227
"""
1228
return ((getattr(athing.__get__(self), "_dbus_name", name),
1229
athing.__get__(self))
1230
for cls in self.__class__.__mro__
1231
for name, athing in
1232
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1233
1234
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1235
out_signature="s",
1236
path_keyword='object_path',
1237
connection_keyword='connection')
1238
def Introspect(self, object_path, connection):
1239
"""Overloading of standard D-Bus method.
1240
1241
Inserts annotation tags on methods and signals.
1242
"""
1243
xmlstring = dbus.service.Object.Introspect(self, object_path,
1244
connection)
1245
try:
1246
document = xml.dom.minidom.parseString(xmlstring)
1247
1248
for if_tag in document.getElementsByTagName("interface"):
1249
# Add annotation tags
1250
for typ in ("method", "signal"):
1251
for tag in if_tag.getElementsByTagName(typ):
1252
annots = dict()
1253
for name, prop in (self.
1254
_get_all_dbus_things(typ)):
1255
if (name == tag.getAttribute("name")
1256
and prop._dbus_interface
1257
== if_tag.getAttribute("name")):
1258
annots.update(getattr(
1259
prop, "_dbus_annotations", {}))
1260
for name, value in annots.items():
1261
ann_tag = document.createElement(
1262
"annotation")
1263
ann_tag.setAttribute("name", name)
1264
ann_tag.setAttribute("value", value)
1265
tag.appendChild(ann_tag)
1266
# Add interface annotation tags
1267
for annotation, value in dict(
1268
itertools.chain.from_iterable(
1269
annotations().items()
1270
for name, annotations
1271
in self._get_all_dbus_things("interface")
1272
if name == if_tag.getAttribute("name")
1273
)).items():
1274
ann_tag = document.createElement("annotation")
1275
ann_tag.setAttribute("name", annotation)
1276
ann_tag.setAttribute("value", value)
1277
if_tag.appendChild(ann_tag)
1278
# Fix argument name for the Introspect method itself
1279
if (if_tag.getAttribute("name")
1280
== dbus.INTROSPECTABLE_IFACE):
1281
for cn in if_tag.getElementsByTagName("method"):
1282
if cn.getAttribute("name") == "Introspect":
1283
for arg in cn.getElementsByTagName("arg"):
1284
if (arg.getAttribute("direction")
1285
== "out"):
1286
arg.setAttribute("name",
1287
"xml_data")
1288
xmlstring = document.toxml("utf-8")
1289
document.unlink()
1290
except (AttributeError, xml.dom.DOMException,
1291
xml.parsers.expat.ExpatError) as error:
1292
logger.error("Failed to override Introspection method",
1293
exc_info=error)
1294
return xmlstring
1295
1296
1297
class DBusObjectWithProperties(DBusObjectWithAnnotations):
784
1298
"""A D-Bus object with properties.
785
1299
786
1300
Classes inheriting from this can use the dbus_service_property
787
1301
decorator to expose methods as D-Bus properties. It exposes the
788
1302
standard Get(), Set(), and GetAll() methods on the D-Bus.
789
1303
"""
790
791
@staticmethod
792
def _is_dbus_property(obj):
793
return getattr(obj, "_dbus_is_property", False)
794
795
def _get_all_dbus_properties(self):
796
"""Returns a generator of (name, attribute) pairs
797
"""
798
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
799
for cls in self.__class__.__mro__
800
for name, prop in
801
inspect.getmembers(cls, self._is_dbus_property))
802
1304
803
1305
def _get_dbus_property(self, interface_name, property_name):
804
1306
"""Returns a bound method if one exists which is a D-Bus
805
1307
property with the specified name and interface.
806
1308
"""
807
for cls in self.__class__.__mro__:
808
for name, value in (inspect.getmembers
809
(cls, self._is_dbus_property)):
1309
for cls in self.__class__.__mro__:
1310
for name, value in inspect.getmembers(
1311
cls, self._is_dbus_thing("property")):
810
1312
if (value._dbus_name == property_name
811
1313
and value._dbus_interface == interface_name):
812
1314
return value.__get__(self)
813
1315
814
1316
# No such property
815
raise DBusPropertyNotFound(self.dbus_object_path + ":"
816
+ interface_name + "."
817
+ property_name)
818
819
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1317
raise DBusPropertyNotFound("{}:{}.{}".format(
1318
self.dbus_object_path, interface_name, property_name))
1319
1320
@classmethod
1321
def _get_all_interface_names(cls):
1322
"""Get a sequence of all interfaces supported by an object"""
1323
return (name for name in set(getattr(getattr(x, attr),
1324
"_dbus_interface", None)
1325
for x in (inspect.getmro(cls))
1326
for attr in dir(x))
1327
if name is not None)
1328
1329
@dbus.service.method(dbus.PROPERTIES_IFACE,
1330
in_signature="ss",
820
1331
out_signature="v")
821
1332
def Get(self, interface_name, property_name):
822
1333
"""Standard D-Bus property Get() method, see D-Bus standard.
828
1339
if not hasattr(value, "variant_level"):
829
1340
return value
830
1341
return type(value)(value, variant_level=value.variant_level+1)
831
1342
832
1343
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
833
1344
def Set(self, interface_name, property_name, value):
834
1345
"""Standard D-Bus property Set() method, see D-Bus standard.
840
1351
# The byte_arrays option is not supported yet on
841
1352
# signatures other than "ay".
842
1353
if prop._dbus_signature != "ay":
843
raise ValueError
844
value = dbus.ByteArray(''.join(unichr(byte)
845
for byte in value))
1354
raise ValueError("Byte arrays not supported for non-"
1355
"'ay' signature {!r}"
1356
.format(prop._dbus_signature))
1357
value = dbus.ByteArray(b''.join(chr(byte)
1358
for byte in value))
846
1359
prop(value)
847
848
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1360
1361
@dbus.service.method(dbus.PROPERTIES_IFACE,
1362
in_signature="s",
849
1363
out_signature="a{sv}")
850
1364
def GetAll(self, interface_name):
851
1365
"""Standard D-Bus property GetAll() method, see D-Bus
852
1366
standard.
853
1367
854
1368
Note: Will not include properties with access="write".
855
1369
"""
856
1370
properties = {}
857
for name, prop in self._get_all_dbus_properties():
1371
for name, prop in self._get_all_dbus_things("property"):
858
1372
if (interface_name
859
1373
and interface_name != prop._dbus_interface):
860
1374
# Interface non-empty but did not match
866
1380
if not hasattr(value, "variant_level"):
867
1381
properties[name] = value
868
1382
continue
869
properties[name] = type(value)(value, variant_level=
870
value.variant_level+1)
1383
properties[name] = type(value)(
1384
value, variant_level=value.variant_level + 1)
871
1385
return dbus.Dictionary(properties, signature="sv")
872
1386
1387
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1388
def PropertiesChanged(self, interface_name, changed_properties,
1389
invalidated_properties):
1390
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1391
standard.
1392
"""
1393
pass
1394
873
1395
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
874
1396
out_signature="s",
875
1397
path_keyword='object_path',
876
1398
connection_keyword='connection')
877
1399
def Introspect(self, object_path, connection):
878
"""Standard D-Bus method, overloaded to insert property tags.
1400
"""Overloading of standard D-Bus method.
1401
1402
Inserts property tags and interface annotation tags.
879
1403
"""
880
xmlstring = dbus.service.Object.Introspect(self, object_path,
881
connection)
1404
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1405
object_path,
1406
connection)
882
1407
try:
883
1408
document = xml.dom.minidom.parseString(xmlstring)
1409
884
1410
def make_tag(document, name, prop):
885
1411
e = document.createElement("property")
886
1412
e.setAttribute("name", name)
887
1413
e.setAttribute("type", prop._dbus_signature)
888
1414
e.setAttribute("access", prop._dbus_access)
889
1415
return e
1416
890
1417
for if_tag in document.getElementsByTagName("interface"):
1418
# Add property tags
891
1419
for tag in (make_tag(document, name, prop)
892
1420
for name, prop
893
in self._get_all_dbus_properties()
1421
in self._get_all_dbus_things("property")
894
1422
if prop._dbus_interface
895
1423
== if_tag.getAttribute("name")):
896
1424
if_tag.appendChild(tag)
1425
# Add annotation tags for properties
1426
for tag in if_tag.getElementsByTagName("property"):
1427
annots = dict()
1428
for name, prop in self._get_all_dbus_things(
1429
"property"):
1430
if (name == tag.getAttribute("name")
1431
and prop._dbus_interface
1432
== if_tag.getAttribute("name")):
1433
annots.update(getattr(
1434
prop, "_dbus_annotations", {}))
1435
for name, value in annots.items():
1436
ann_tag = document.createElement(
1437
"annotation")
1438
ann_tag.setAttribute("name", name)
1439
ann_tag.setAttribute("value", value)
1440
tag.appendChild(ann_tag)
897
1441
# Add the names to the return values for the
898
1442
# "org.freedesktop.DBus.Properties" methods
899
1443
if (if_tag.getAttribute("name")
914
1458
except (AttributeError, xml.dom.DOMException,
915
1459
xml.parsers.expat.ExpatError) as error:
916
1460
logger.error("Failed to override Introspection method",
917
error)
918
return xmlstring
919
920
921
def datetime_to_dbus (dt, variant_level=0):
1461
exc_info=error)
1462
return xmlstring
1463
1464
try:
1465
dbus.OBJECT_MANAGER_IFACE
1466
except AttributeError:
1467
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1468
1469
1470
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1471
"""A D-Bus object with an ObjectManager.
1472
1473
Classes inheriting from this exposes the standard
1474
GetManagedObjects call and the InterfacesAdded and
1475
InterfacesRemoved signals on the standard
1476
"org.freedesktop.DBus.ObjectManager" interface.
1477
1478
Note: No signals are sent automatically; they must be sent
1479
manually.
1480
"""
1481
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1482
out_signature="a{oa{sa{sv}}}")
1483
def GetManagedObjects(self):
1484
"""This function must be overridden"""
1485
raise NotImplementedError()
1486
1487
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1488
signature="oa{sa{sv}}")
1489
def InterfacesAdded(self, object_path, interfaces_and_properties):
1490
pass
1491
1492
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1493
def InterfacesRemoved(self, object_path, interfaces):
1494
pass
1495
1496
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1497
out_signature="s",
1498
path_keyword='object_path',
1499
connection_keyword='connection')
1500
def Introspect(self, object_path, connection):
1501
"""Overloading of standard D-Bus method.
1502
1503
Override return argument name of GetManagedObjects to be
1504
"objpath_interfaces_and_properties"
1505
"""
1506
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1507
object_path,
1508
connection)
1509
try:
1510
document = xml.dom.minidom.parseString(xmlstring)
1511
1512
for if_tag in document.getElementsByTagName("interface"):
1513
# Fix argument name for the GetManagedObjects method
1514
if (if_tag.getAttribute("name")
1515
== dbus.OBJECT_MANAGER_IFACE):
1516
for cn in if_tag.getElementsByTagName("method"):
1517
if (cn.getAttribute("name")
1518
== "GetManagedObjects"):
1519
for arg in cn.getElementsByTagName("arg"):
1520
if (arg.getAttribute("direction")
1521
== "out"):
1522
arg.setAttribute(
1523
"name",
1524
"objpath_interfaces"
1525
"_and_properties")
1526
xmlstring = document.toxml("utf-8")
1527
document.unlink()
1528
except (AttributeError, xml.dom.DOMException,
1529
xml.parsers.expat.ExpatError) as error:
1530
logger.error("Failed to override Introspection method",
1531
exc_info=error)
1532
return xmlstring
1533
1534
1535
def datetime_to_dbus(dt, variant_level=0):
922
1536
"""Convert a UTC datetime.datetime() to a D-Bus type."""
923
1537
if dt is None:
924
return dbus.String("", variant_level = variant_level)
925
return dbus.String(dt.isoformat(),
926
variant_level=variant_level)
927
928
929
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
930
.__metaclass__):
931
"""Applied to an empty subclass of a D-Bus object, this metaclass
932
will add additional D-Bus attributes matching a certain pattern.
1538
return dbus.String("", variant_level=variant_level)
1539
return dbus.String(dt.isoformat(), variant_level=variant_level)
1540
1541
1542
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1543
"""A class decorator; applied to a subclass of
1544
dbus.service.Object, it will add alternate D-Bus attributes with
1545
interface names according to the "alt_interface_names" mapping.
1546
Usage:
1547
1548
@alternate_dbus_interfaces({"org.example.Interface":
1549
"net.example.AlternateInterface"})
1550
class SampleDBusObject(dbus.service.Object):
1551
@dbus.service.method("org.example.Interface")
1552
def SampleDBusMethod():
1553
pass
1554
1555
The above "SampleDBusMethod" on "SampleDBusObject" will be
1556
reachable via two interfaces: "org.example.Interface" and
1557
"net.example.AlternateInterface", the latter of which will have
1558
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1559
"true", unless "deprecate" is passed with a False value.
1560
1561
This works for methods and signals, and also for D-Bus properties
1562
(from DBusObjectWithProperties) and interfaces (from the
1563
dbus_interface_annotations decorator).
933
1564
"""
934
def __new__(mcs, name, bases, attr):
935
# Go through all the base classes which could have D-Bus
936
# methods, signals, or properties in them
937
for base in (b for b in bases
938
if issubclass(b, dbus.service.Object)):
939
# Go though all attributes of the base class
940
for attrname, attribute in inspect.getmembers(base):
1565
1566
def wrapper(cls):
1567
for orig_interface_name, alt_interface_name in (
1568
alt_interface_names.items()):
1569
attr = {}
1570
interface_names = set()
1571
# Go though all attributes of the class
1572
for attrname, attribute in inspect.getmembers(cls):
941
1573
# Ignore non-D-Bus attributes, and D-Bus attributes
942
1574
# with the wrong interface name
943
1575
if (not hasattr(attribute, "_dbus_interface")
944
or not attribute._dbus_interface
945
.startswith("se.recompile.Mandos")):
1576
or not attribute._dbus_interface.startswith(
1577
orig_interface_name)):
946
1578
continue
947
1579
# Create an alternate D-Bus interface name based on
948
1580
# the current name
949
alt_interface = (attribute._dbus_interface
950
.replace("se.recompile.Mandos",
951
"se.bsnet.fukt.Mandos"))
1581
alt_interface = attribute._dbus_interface.replace(
1582
orig_interface_name, alt_interface_name)
1583
interface_names.add(alt_interface)
952
1584
# Is this a D-Bus signal?
953
1585
if getattr(attribute, "_dbus_is_signal", False):
954
# Extract the original non-method function by
955
# black magic
956
nonmethod_func = (dict(
1586
# Extract the original non-method undecorated
1587
# function by black magic
1588
if sys.version_info.major == 2:
1589
nonmethod_func = (dict(
957
1590
zip(attribute.func_code.co_freevars,
958
attribute.__closure__))["func"]
959
.cell_contents)
1591
attribute.__closure__))
1592
["func"].cell_contents)
1593
else:
1594
nonmethod_func = (dict(
1595
zip(attribute.__code__.co_freevars,
1596
attribute.__closure__))
1597
["func"].cell_contents)
960
1598
# Create a new, but exactly alike, function
961
1599
# object, and decorate it to be a new D-Bus signal
962
1600
# with the alternate D-Bus interface name
963
new_function = (dbus.service.signal
964
(alt_interface,
965
attribute._dbus_signature)
966
(types.FunctionType(
967
nonmethod_func.func_code,
968
nonmethod_func.func_globals,
969
nonmethod_func.func_name,
970
nonmethod_func.func_defaults,
971
nonmethod_func.func_closure)))
1601
new_function = copy_function(nonmethod_func)
1602
new_function = (dbus.service.signal(
1603
alt_interface,
1604
attribute._dbus_signature)(new_function))
1605
# Copy annotations, if any
1606
try:
1607
new_function._dbus_annotations = dict(
1608
attribute._dbus_annotations)
1609
except AttributeError:
1610
pass
1611
972
1612
# Define a creator of a function to call both the
973
# old and new functions, so both the old and new
974
# signals gets sent when the function is called
1613
# original and alternate functions, so both the
1614
# original and alternate signals gets sent when
1615
# the function is called
975
1616
def fixscope(func1, func2):
976
1617
"""This function is a scope container to pass
977
1618
func1 and func2 to the "call_both" function
978
1619
outside of its arguments"""
1620
1621
@functools.wraps(func2)
979
1622
def call_both(*args, **kwargs):
980
1623
"""This function will emit two D-Bus
981
1624
signals by calling func1 and func2"""
982
1625
func1(*args, **kwargs)
983
1626
func2(*args, **kwargs)
1627
# Make wrapper function look like a D-Bus
1628
# signal
1629
for name, attr in inspect.getmembers(func2):
1630
if name.startswith("_dbus_"):
1631
setattr(call_both, name, attr)
1632
984
1633
return call_both
985
1634
# Create the "call_both" function and add it to
986
1635
# the class
987
attr[attrname] = fixscope(attribute,
988
new_function)
1636
attr[attrname] = fixscope(attribute, new_function)
989
1637
# Is this a D-Bus method?
990
1638
elif getattr(attribute, "_dbus_is_method", False):
991
1639
# Create a new, but exactly alike, function
992
1640
# object. Decorate it to be a new D-Bus method
993
1641
# with the alternate D-Bus interface name. Add it
994
1642
# to the class.
995
attr[attrname] = (dbus.service.method
996
(alt_interface,
997
attribute._dbus_in_signature,
998
attribute._dbus_out_signature)
999
(types.FunctionType
1000
(attribute.func_code,
1001
attribute.func_globals,
1002
attribute.func_name,
1003
attribute.func_defaults,
1004
attribute.func_closure)))
1643
attr[attrname] = (
1644
dbus.service.method(
1645
alt_interface,
1646
attribute._dbus_in_signature,
1647
attribute._dbus_out_signature)
1648
(copy_function(attribute)))
1649
# Copy annotations, if any
1650
try:
1651
attr[attrname]._dbus_annotations = dict(
1652
attribute._dbus_annotations)
1653
except AttributeError:
1654
pass
1005
1655
# Is this a D-Bus property?
1006
1656
elif getattr(attribute, "_dbus_is_property", False):
1007
1657
# Create a new, but exactly alike, function
1008
1658
# object, and decorate it to be a new D-Bus
1009
1659
# property with the alternate D-Bus interface
1010
1660
# name. Add it to the class.
1011
attr[attrname] = (dbus_service_property
1012
(alt_interface,
1013
attribute._dbus_signature,
1014
attribute._dbus_access,
1015
attribute
1016
._dbus_get_args_options
1017
["byte_arrays"])
1018
(types.FunctionType
1019
(attribute.func_code,
1020
attribute.func_globals,
1021
attribute.func_name,
1022
attribute.func_defaults,
1023
attribute.func_closure)))
1024
return type.__new__(mcs, name, bases, attr)
1025
1026
1661
attr[attrname] = (dbus_service_property(
1662
alt_interface, attribute._dbus_signature,
1663
attribute._dbus_access,
1664
attribute._dbus_get_args_options
1665
["byte_arrays"])
1666
(copy_function(attribute)))
1667
# Copy annotations, if any
1668
try:
1669
attr[attrname]._dbus_annotations = dict(
1670
attribute._dbus_annotations)
1671
except AttributeError:
1672
pass
1673
# Is this a D-Bus interface?
1674
elif getattr(attribute, "_dbus_is_interface", False):
1675
# Create a new, but exactly alike, function
1676
# object. Decorate it to be a new D-Bus interface
1677
# with the alternate D-Bus interface name. Add it
1678
# to the class.
1679
attr[attrname] = (
1680
dbus_interface_annotations(alt_interface)
1681
(copy_function(attribute)))
1682
if deprecate:
1683
# Deprecate all alternate interfaces
1684
iname = "_AlternateDBusNames_interface_annotation{}"
1685
for interface_name in interface_names:
1686
1687
@dbus_interface_annotations(interface_name)
1688
def func(self):
1689
return {"org.freedesktop.DBus.Deprecated":
1690
"true"}
1691
# Find an unused name
1692
for aname in (iname.format(i)
1693
for i in itertools.count()):
1694
if aname not in attr:
1695
attr[aname] = func
1696
break
1697
if interface_names:
1698
# Replace the class with a new subclass of it with
1699
# methods, signals, etc. as created above.
1700
if sys.version_info.major == 2:
1701
cls = type(b"{}Alternate".format(cls.__name__),
1702
(cls, ), attr)
1703
else:
1704
cls = type("{}Alternate".format(cls.__name__),
1705
(cls, ), attr)
1706
return cls
1707
1708
return wrapper
1709
1710
1711
@alternate_dbus_interfaces({"se.recompile.Mandos":
1712
"se.bsnet.fukt.Mandos"})
1027
1713
class ClientDBus(Client, DBusObjectWithProperties):
1028
1714
"""A Client class using D-Bus
1029
1715
1030
1716
Attributes:
1031
1717
dbus_object_path: dbus.ObjectPath
1032
1718
bus: dbus.SystemBus()
1033
1719
"""
1034
1720
1035
1721
runtime_expansions = (Client.runtime_expansions
1036
+ ("dbus_object_path",))
1037
1722
+ ("dbus_object_path", ))
1723
1724
_interface = "se.recompile.Mandos.Client"
1725
1038
1726
# dbus.service.Object doesn't use super(), so we can't either.
1039
1040
def __init__(self, bus = None, *args, **kwargs):
1727
1728
def __init__(self, bus=None, *args, **kwargs):
1041
1729
self.bus = bus
1042
1730
Client.__init__(self, *args, **kwargs)
1043
self._approvals_pending = 0
1044
1045
self._approvals_pending = 0
1046
1731
# Only now, when this client is initialized, can it show up on
1047
1732
# the D-Bus
1048
client_object_name = unicode(self.name).translate(
1733
client_object_name = str(self.name).translate(
1049
1734
{ord("."): ord("_"),
1050
1735
ord("-"): ord("_")})
1051
self.dbus_object_path = (dbus.ObjectPath
1052
("/clients/" + client_object_name))
1736
self.dbus_object_path = dbus.ObjectPath(
1737
"/clients/" + client_object_name)
1053
1738
DBusObjectWithProperties.__init__(self, self.bus,
1054
1739
self.dbus_object_path)
1055
1056
def notifychangeproperty(transform_func,
1057
dbus_name, type_func=lambda x: x,
1058
variant_level=1):
1740
1741
def notifychangeproperty(transform_func, dbus_name,
1742
type_func=lambda x: x,
1743
variant_level=1,
1744
invalidate_only=False,
1745
_interface=_interface):
1059
1746
""" Modify a variable so that it's a property which announces
1060
1747
its changes to DBus.
1061
1748
1062
1749
transform_fun: Function that takes a value and a variant_level
1063
1750
and transforms it to a D-Bus type.
1064
1751
dbus_name: D-Bus name of the variable
1066
1753
to the D-Bus. Default: no transform
1067
1754
variant_level: D-Bus variant level. Default: 1
1068
1755
"""
1069
attrname = "_{0}".format(dbus_name)
1756
attrname = "_{}".format(dbus_name)
1757
1070
1758
def setter(self, value):
1071
1759
if hasattr(self, "dbus_object_path"):
1072
1760
if (not hasattr(self, attrname) or
1073
1761
type_func(getattr(self, attrname, None))
1074
1762
!= type_func(value)):
1075
dbus_value = transform_func(type_func(value),
1076
variant_level
1077
=variant_level)
1078
self.PropertyChanged(dbus.String(dbus_name),
1079
dbus_value)
1763
if invalidate_only:
1764
self.PropertiesChanged(
1765
_interface, dbus.Dictionary(),
1766
dbus.Array((dbus_name, )))
1767
else:
1768
dbus_value = transform_func(
1769
type_func(value),
1770
variant_level=variant_level)
1771
self.PropertyChanged(dbus.String(dbus_name),
1772
dbus_value)
1773
self.PropertiesChanged(
1774
_interface,
1775
dbus.Dictionary({dbus.String(dbus_name):
1776
dbus_value}),
1777
dbus.Array())
1080
1778
setattr(self, attrname, value)
1081
1779
1082
1780
return property(lambda self: getattr(self, attrname), setter)
1083
1084
1781
1085
1782
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1086
1783
approvals_pending = notifychangeproperty(dbus.Boolean,
1087
1784
"ApprovalPending",
1088
type_func = bool)
1785
type_func=bool)
1089
1786
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1090
1787
last_enabled = notifychangeproperty(datetime_to_dbus,
1091
1788
"LastEnabled")
1092
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1093
type_func = lambda checker:
1094
checker is not None)
1789
checker = notifychangeproperty(
1790
dbus.Boolean, "CheckerRunning",
1791
type_func=lambda checker: checker is not None)
1095
1792
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1096
1793
"LastCheckedOK")
1794
last_checker_status = notifychangeproperty(dbus.Int16,
1795
"LastCheckerStatus")
1097
1796
last_approval_request = notifychangeproperty(
1098
1797
datetime_to_dbus, "LastApprovalRequest")
1099
1798
approved_by_default = notifychangeproperty(dbus.Boolean,
1100
1799
"ApprovedByDefault")
1101
approval_delay = notifychangeproperty(dbus.UInt64,
1102
"ApprovalDelay",
1103
type_func =
1104
timedelta_to_milliseconds)
1800
approval_delay = notifychangeproperty(
1801
dbus.UInt64, "ApprovalDelay",
1802
type_func=lambda td: td.total_seconds() * 1000)
1105
1803
approval_duration = notifychangeproperty(
1106
1804
dbus.UInt64, "ApprovalDuration",
1107
type_func = timedelta_to_milliseconds)
1805
type_func=lambda td: td.total_seconds() * 1000)
1108
1806
host = notifychangeproperty(dbus.String, "Host")
1109
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1110
type_func =
1111
timedelta_to_milliseconds)
1807
timeout = notifychangeproperty(
1808
dbus.UInt64, "Timeout",
1809
type_func=lambda td: td.total_seconds() * 1000)
1112
1810
extended_timeout = notifychangeproperty(
1113
1811
dbus.UInt64, "ExtendedTimeout",
1114
type_func = timedelta_to_milliseconds)
1115
interval = notifychangeproperty(dbus.UInt64,
1116
"Interval",
1117
type_func =
1118
timedelta_to_milliseconds)
1812
type_func=lambda td: td.total_seconds() * 1000)
1813
interval = notifychangeproperty(
1814
dbus.UInt64, "Interval",
1815
type_func=lambda td: td.total_seconds() * 1000)
1119
1816
checker_command = notifychangeproperty(dbus.String, "Checker")
1120
1817
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1818
invalidate_only=True)
1819
1121
1820
del notifychangeproperty
1122
1821
1123
1822
def __del__(self, *args, **kwargs):
1124
1823
try:
1125
1824
self.remove_from_connection()
1128
1827
if hasattr(DBusObjectWithProperties, "__del__"):
1129
1828
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1130
1829
Client.__del__(self, *args, **kwargs)
1131
1132
def checker_callback(self, pid, condition, command,
1133
*args, **kwargs):
1134
self.checker_callback_tag = None
1135
self.checker = None
1136
if os.WIFEXITED(condition):
1137
exitstatus = os.WEXITSTATUS(condition)
1830
1831
def checker_callback(self, source, condition,
1832
connection, command, *args, **kwargs):
1833
ret = Client.checker_callback(self, source, condition,
1834
connection, command, *args,
1835
**kwargs)
1836
exitstatus = self.last_checker_status
1837
if exitstatus >= 0:
1138
1838
# Emit D-Bus signal
1139
1839
self.CheckerCompleted(dbus.Int16(exitstatus),
1140
dbus.Int64(condition),
1840
# This is specific to GNU libC
1841
dbus.Int64(exitstatus << 8),
1141
1842
dbus.String(command))
1142
1843
else:
1143
1844
# Emit D-Bus signal
1144
1845
self.CheckerCompleted(dbus.Int16(-1),
1145
dbus.Int64(condition),
1846
dbus.Int64(
1847
# This is specific to GNU libC
1848
(exitstatus << 8)
1849
| self.last_checker_signal),
1146
1850
dbus.String(command))
1147
1148
return Client.checker_callback(self, pid, condition, command,
1149
*args, **kwargs)
1150
1851
return ret
1852
1151
1853
def start_checker(self, *args, **kwargs):
1152
old_checker = self.checker
1153
if self.checker is not None:
1154
old_checker_pid = self.checker.pid
1155
else:
1156
old_checker_pid = None
1854
old_checker_pid = getattr(self.checker, "pid", None)
1157
1855
r = Client.start_checker(self, *args, **kwargs)
1158
1856
# Only if new checker process was started
1159
1857
if (self.checker is not None
1161
1859
# Emit D-Bus signal
1162
1860
self.CheckerStarted(self.current_checker_command)
1163
1861
return r
1164
1862
1165
1863
def _reset_approved(self):
1166
1864
self.approved = None
1167
1865
return False
1168
1866
1169
1867
def approve(self, value=True):
1170
self.send_changedstate()
1171
1868
self.approved = value
1172
gobject.timeout_add(timedelta_to_milliseconds
1173
(self.approval_duration),
1174
self._reset_approved)
1175
1176
1177
## D-Bus methods, signals & properties
1178
_interface = "se.recompile.Mandos.Client"
1179
1180
## Signals
1181
1869
GLib.timeout_add(int(self.approval_duration.total_seconds()
1870
* 1000), self._reset_approved)
1871
self.send_changedstate()
1872
1873
# D-Bus methods, signals & properties
1874
1875
# Interfaces
1876
1877
# Signals
1878
1182
1879
# CheckerCompleted - signal
1183
1880
@dbus.service.signal(_interface, signature="nxs")
1184
1881
def CheckerCompleted(self, exitcode, waitstatus, command):
1185
1882
"D-Bus signal"
1186
1883
pass
1187
1884
1188
1885
# CheckerStarted - signal
1189
1886
@dbus.service.signal(_interface, signature="s")
1190
1887
def CheckerStarted(self, command):
1191
1888
"D-Bus signal"
1192
1889
pass
1193
1890
1194
1891
# PropertyChanged - signal
1892
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1195
1893
@dbus.service.signal(_interface, signature="sv")
1196
1894
def PropertyChanged(self, property, value):
1197
1895
"D-Bus signal"
1198
1896
pass
1199
1897
1200
1898
# GotSecret - signal
1201
1899
@dbus.service.signal(_interface)
1202
1900
def GotSecret(self):
1205
1903
server to mandos-client
1206
1904
"""
1207
1905
pass
1208
1906
1209
1907
# Rejected - signal
1210
1908
@dbus.service.signal(_interface, signature="s")
1211
1909
def Rejected(self, reason):
1212
1910
"D-Bus signal"
1213
1911
pass
1214
1912
1215
1913
# NeedApproval - signal
1216
1914
@dbus.service.signal(_interface, signature="tb")
1217
1915
def NeedApproval(self, timeout, default):
1218
1916
"D-Bus signal"
1219
1917
return self.need_approval()
1220
1221
# NeRwequest - signal
1222
@dbus.service.signal(_interface, signature="s")
1223
def NewRequest(self, ip):
1224
"""D-Bus signal
1225
Is sent after a client request a password.
1226
"""
1227
pass
1228
1229
## Methods
1230
1918
1919
# Methods
1920
1231
1921
# Approve - method
1232
1922
@dbus.service.method(_interface, in_signature="b")
1233
1923
def Approve(self, value):
1234
1924
self.approve(value)
1235
1925
1236
1926
# CheckedOK - method
1237
1927
@dbus.service.method(_interface)
1238
1928
def CheckedOK(self):
1239
1929
self.checked_ok()
1240
1930
1241
1931
# Enable - method
1932
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1242
1933
@dbus.service.method(_interface)
1243
1934
def Enable(self):
1244
1935
"D-Bus method"
1245
1936
self.enable()
1246
1937
1247
1938
# StartChecker - method
1939
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1248
1940
@dbus.service.method(_interface)
1249
1941
def StartChecker(self):
1250
1942
"D-Bus method"
1251
1943
self.start_checker()
1252
1944
1253
1945
# Disable - method
1946
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1254
1947
@dbus.service.method(_interface)
1255
1948
def Disable(self):
1256
1949
"D-Bus method"
1257
1950
self.disable()
1258
1951
1259
1952
# StopChecker - method
1953
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1260
1954
@dbus.service.method(_interface)
1261
1955
def StopChecker(self):
1262
1956
self.stop_checker()
1263
1264
## Properties
1265
1957
1958
# Properties
1959
1266
1960
# ApprovalPending - property
1267
1961
@dbus_service_property(_interface, signature="b", access="read")
1268
1962
def ApprovalPending_dbus_property(self):
1269
1963
return dbus.Boolean(bool(self.approvals_pending))
1270
1964
1271
1965
# ApprovedByDefault - property
1272
@dbus_service_property(_interface, signature="b",
1966
@dbus_service_property(_interface,
1967
signature="b",
1273
1968
access="readwrite")
1274
1969
def ApprovedByDefault_dbus_property(self, value=None):
1275
1970
if value is None: # get
1276
1971
return dbus.Boolean(self.approved_by_default)
1277
1972
self.approved_by_default = bool(value)
1278
1973
1279
1974
# ApprovalDelay - property
1280
@dbus_service_property(_interface, signature="t",
1975
@dbus_service_property(_interface,
1976
signature="t",
1281
1977
access="readwrite")
1282
1978
def ApprovalDelay_dbus_property(self, value=None):
1283
1979
if value is None: # get
1284
return dbus.UInt64(self.approval_delay_milliseconds())
1980
return dbus.UInt64(self.approval_delay.total_seconds()
1981
* 1000)
1285
1982
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1286
1983
1287
1984
# ApprovalDuration - property
1288
@dbus_service_property(_interface, signature="t",
1985
@dbus_service_property(_interface,
1986
signature="t",
1289
1987
access="readwrite")
1290
1988
def ApprovalDuration_dbus_property(self, value=None):
1291
1989
if value is None: # get
1292
return dbus.UInt64(timedelta_to_milliseconds(
1293
self.approval_duration))
1990
return dbus.UInt64(self.approval_duration.total_seconds()
1991
* 1000)
1294
1992
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1295
1993
1296
1994
# Name - property
1995
@dbus_annotations(
1996
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1297
1997
@dbus_service_property(_interface, signature="s", access="read")
1298
1998
def Name_dbus_property(self):
1299
1999
return dbus.String(self.name)
1300
2000
1301
2001
# Fingerprint - property
2002
@dbus_annotations(
2003
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1302
2004
@dbus_service_property(_interface, signature="s", access="read")
1303
2005
def Fingerprint_dbus_property(self):
1304
2006
return dbus.String(self.fingerprint)
1305
2007
1306
2008
# Host - property
1307
@dbus_service_property(_interface, signature="s",
2009
@dbus_service_property(_interface,
2010
signature="s",
1308
2011
access="readwrite")
1309
2012
def Host_dbus_property(self, value=None):
1310
2013
if value is None: # get
1311
2014
return dbus.String(self.host)
1312
self.host = unicode(value)
1313
2015
self.host = str(value)
2016
1314
2017
# Created - property
2018
@dbus_annotations(
2019
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1315
2020
@dbus_service_property(_interface, signature="s", access="read")
1316
2021
def Created_dbus_property(self):
1317
2022
return datetime_to_dbus(self.created)
1318
2023
1319
2024
# LastEnabled - property
1320
2025
@dbus_service_property(_interface, signature="s", access="read")
1321
2026
def LastEnabled_dbus_property(self):
1322
2027
return datetime_to_dbus(self.last_enabled)
1323
2028
1324
2029
# Enabled - property
1325
@dbus_service_property(_interface, signature="b",
2030
@dbus_service_property(_interface,
2031
signature="b",
1326
2032
access="readwrite")
1327
2033
def Enabled_dbus_property(self, value=None):
1328
2034
if value is None: # get
1331
2037
self.enable()
1332
2038
else:
1333
2039
self.disable()
1334
2040
1335
2041
# LastCheckedOK - property
1336
@dbus_service_property(_interface, signature="s",
2042
@dbus_service_property(_interface,
2043
signature="s",
1337
2044
access="readwrite")
1338
2045
def LastCheckedOK_dbus_property(self, value=None):
1339
2046
if value is not None:
1340
2047
self.checked_ok()
1341
2048
return
1342
2049
return datetime_to_dbus(self.last_checked_ok)
1343
2050
2051
# LastCheckerStatus - property
2052
@dbus_service_property(_interface, signature="n", access="read")
2053
def LastCheckerStatus_dbus_property(self):
2054
return dbus.Int16(self.last_checker_status)
2055
1344
2056
# Expires - property
1345
2057
@dbus_service_property(_interface, signature="s", access="read")
1346
2058
def Expires_dbus_property(self):
1347
2059
return datetime_to_dbus(self.expires)
1348
2060
1349
2061
# LastApprovalRequest - property
1350
2062
@dbus_service_property(_interface, signature="s", access="read")
1351
2063
def LastApprovalRequest_dbus_property(self):
1352
2064
return datetime_to_dbus(self.last_approval_request)
1353
2065
1354
2066
# Timeout - property
1355
@dbus_service_property(_interface, signature="t",
2067
@dbus_service_property(_interface,
2068
signature="t",
1356
2069
access="readwrite")
1357
2070
def Timeout_dbus_property(self, value=None):
1358
2071
if value is None: # get
1359
return dbus.UInt64(self.timeout_milliseconds())
2072
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2073
old_timeout = self.timeout
1360
2074
self.timeout = datetime.timedelta(0, 0, 0, value)
1361
if getattr(self, "disable_initiator_tag", None) is None:
1362
return
1363
# Reschedule timeout
1364
gobject.source_remove(self.disable_initiator_tag)
1365
self.disable_initiator_tag = None
1366
self.expires = None
1367
time_to_die = timedelta_to_milliseconds((self
1368
.last_checked_ok
1369
+ self.timeout)
1370
- datetime.datetime
1371
.utcnow())
1372
if time_to_die <= 0:
1373
# The timeout has passed
1374
self.disable()
1375
else:
1376
self.expires = (datetime.datetime.utcnow()
1377
+ datetime.timedelta(milliseconds =
1378
time_to_die))
1379
self.disable_initiator_tag = (gobject.timeout_add
1380
(time_to_die, self.disable))
1381
2075
# Reschedule disabling
2076
if self.enabled:
2077
now = datetime.datetime.utcnow()
2078
self.expires += self.timeout - old_timeout
2079
if self.expires <= now:
2080
# The timeout has passed
2081
self.disable()
2082
else:
2083
if (getattr(self, "disable_initiator_tag", None)
2084
is None):
2085
return
2086
GLib.source_remove(self.disable_initiator_tag)
2087
self.disable_initiator_tag = GLib.timeout_add(
2088
int((self.expires - now).total_seconds() * 1000),
2089
self.disable)
2090
1382
2091
# ExtendedTimeout - property
1383
@dbus_service_property(_interface, signature="t",
2092
@dbus_service_property(_interface,
2093
signature="t",
1384
2094
access="readwrite")
1385
2095
def ExtendedTimeout_dbus_property(self, value=None):
1386
2096
if value is None: # get
1387
return dbus.UInt64(self.extended_timeout_milliseconds())
2097
return dbus.UInt64(self.extended_timeout.total_seconds()
2098
* 1000)
1388
2099
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1389
2100
1390
2101
# Interval - property
1391
@dbus_service_property(_interface, signature="t",
2102
@dbus_service_property(_interface,
2103
signature="t",
1392
2104
access="readwrite")
1393
2105
def Interval_dbus_property(self, value=None):
1394
2106
if value is None: # get
1395
return dbus.UInt64(self.interval_milliseconds())
2107
return dbus.UInt64(self.interval.total_seconds() * 1000)
1396
2108
self.interval = datetime.timedelta(0, 0, 0, value)
1397
2109
if getattr(self, "checker_initiator_tag", None) is None:
1398
2110
return
1399
2111
if self.enabled:
1400
2112
# Reschedule checker run
1401
gobject.source_remove(self.checker_initiator_tag)
1402
self.checker_initiator_tag = (gobject.timeout_add
1403
(value, self.start_checker))
1404
self.start_checker() # Start one now, too
1405
2113
GLib.source_remove(self.checker_initiator_tag)
2114
self.checker_initiator_tag = GLib.timeout_add(
2115
value, self.start_checker)
2116
self.start_checker() # Start one now, too
2117
1406
2118
# Checker - property
1407
@dbus_service_property(_interface, signature="s",
2119
@dbus_service_property(_interface,
2120
signature="s",
1408
2121
access="readwrite")
1409
2122
def Checker_dbus_property(self, value=None):
1410
2123
if value is None: # get
1411
2124
return dbus.String(self.checker_command)
1412
self.checker_command = unicode(value)
1413
2125
self.checker_command = str(value)
2126
1414
2127
# CheckerRunning - property
1415
@dbus_service_property(_interface, signature="b",
2128
@dbus_service_property(_interface,
2129
signature="b",
1416
2130
access="readwrite")
1417
2131
def CheckerRunning_dbus_property(self, value=None):
1418
2132
if value is None: # get
1421
2135
self.start_checker()
1422
2136
else:
1423
2137
self.stop_checker()
1424
2138
1425
2139
# ObjectPath - property
2140
@dbus_annotations(
2141
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2142
"org.freedesktop.DBus.Deprecated": "true"})
1426
2143
@dbus_service_property(_interface, signature="o", access="read")
1427
2144
def ObjectPath_dbus_property(self):
1428
return self.dbus_object_path # is already a dbus.ObjectPath
1429
2145
return self.dbus_object_path # is already a dbus.ObjectPath
2146
1430
2147
# Secret = property
1431
@dbus_service_property(_interface, signature="ay",
1432
access="write", byte_arrays=True)
2148
@dbus_annotations(
2149
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2150
"invalidates"})
2151
@dbus_service_property(_interface,
2152
signature="ay",
2153
access="write",
2154
byte_arrays=True)
1433
2155
def Secret_dbus_property(self, value):
1434
self.secret = str(value)
1435
2156
self.secret = bytes(value)
2157
1436
2158
del _interface
1437
2159
1438
2160
1441
2163
self._pipe = child_pipe
1442
2164
self._pipe.send(('init', fpr, address))
1443
2165
if not self._pipe.recv():
1444
raise KeyError()
1445
2166
raise KeyError(fpr)
2167
1446
2168
def __getattribute__(self, name):
1447
2169
if name == '_pipe':
1448
2170
return super(ProxyClient, self).__getattribute__(name)
1451
2173
if data[0] == 'data':
1452
2174
return data[1]
1453
2175
if data[0] == 'function':
2176
1454
2177
def func(*args, **kwargs):
1455
2178
self._pipe.send(('funcall', name, args, kwargs))
1456
2179
return self._pipe.recv()[1]
2180
1457
2181
return func
1458
2182
1459
2183
def __setattr__(self, name, value):
1460
2184
if name == '_pipe':
1461
2185
return super(ProxyClient, self).__setattr__(name, value)
1462
2186
self._pipe.send(('setattr', name, value))
1463
2187
1464
2188
1465
class ClientDBusTransitional(ClientDBus):
1466
__metaclass__ = AlternateDBusNamesMetaclass
1467
1468
1469
2189
class ClientHandler(socketserver.BaseRequestHandler, object):
1470
2190
"""A class to handle client connections.
1471
2191
1472
2192
Instantiated once for each connection to handle it.
1473
2193
Note: This will run in its own forked process."""
1474
2194
1475
2195
def handle(self):
1476
2196
with contextlib.closing(self.server.child_pipe) as child_pipe:
1477
2197
logger.info("TCP connection from: %s",
1478
unicode(self.client_address))
2198
str(self.client_address))
1479
2199
logger.debug("Pipe FD: %d",
1480
2200
self.server.child_pipe.fileno())
1481
1482
session = (gnutls.connection
1483
.ClientSession(self.request,
1484
gnutls.connection
1485
.X509Credentials()))
1486
1487
# Note: gnutls.connection.X509Credentials is really a
1488
# generic GnuTLS certificate credentials object so long as
1489
# no X.509 keys are added to it. Therefore, we can use it
1490
# here despite using OpenPGP certificates.
1491
1492
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1493
# "+AES-256-CBC", "+SHA1",
1494
# "+COMP-NULL", "+CTYPE-OPENPGP",
1495
# "+DHE-DSS"))
2201
2202
session = gnutls.ClientSession(self.request)
2203
2204
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2205
# "+AES-256-CBC", "+SHA1",
2206
# "+COMP-NULL", "+CTYPE-OPENPGP",
2207
# "+DHE-DSS"))
1496
2208
# Use a fallback default, since this MUST be set.
1497
2209
priority = self.server.gnutls_priority
1498
2210
if priority is None:
1499
2211
priority = "NORMAL"
1500
(gnutls.library.functions
1501
.gnutls_priority_set_direct(session._c_object,
1502
priority, None))
1503
2212
gnutls.priority_set_direct(session._c_object,
2213
priority.encode("utf-8"),
2214
None)
2215
1504
2216
# Start communication using the Mandos protocol
1505
2217
# Get protocol number
1506
2218
line = self.request.makefile().readline()
1507
2219
logger.debug("Protocol version: %r", line)
1508
2220
try:
1509
2221
if int(line.strip().split()[0]) > 1:
1510
raise RuntimeError
2222
raise RuntimeError(line)
1511
2223
except (ValueError, IndexError, RuntimeError) as error:
1512
2224
logger.error("Unknown protocol version: %s", error)
1513
2225
return
1514
2226
1515
2227
# Start GnuTLS connection
1516
2228
try:
1517
2229
session.handshake()
1518
except gnutls.errors.GNUTLSError as error:
2230
except gnutls.Error as error:
1519
2231
logger.warning("Handshake failed: %s", error)
1520
2232
# Do not run session.bye() here: the session is not
1521
2233
# established. Just abandon the request.
1522
2234
return
1523
2235
logger.debug("Handshake succeeded")
1524
2236
1525
2237
approval_required = False
1526
2238
try:
1527
2239
try:
1528
fpr = self.fingerprint(self.peer_certificate
1529
(session))
1530
except (TypeError,
1531
gnutls.errors.GNUTLSError) as error:
2240
fpr = self.fingerprint(
2241
self.peer_certificate(session))
2242
except (TypeError, gnutls.Error) as error:
1532
2243
logger.warning("Bad certificate: %s", error)
1533
2244
return
1534
2245
logger.debug("Fingerprint: %s", fpr)
1535
2246
1536
2247
try:
1537
2248
client = ProxyClient(child_pipe, fpr,
1538
2249
self.client_address)
1539
2250
except KeyError:
1540
2251
return
1541
1542
if self.server.use_dbus:
1543
# Emit D-Bus signal
1544
client.NewRequest(str(self.client_address))
1545
2252
1546
2253
if client.approval_delay:
1547
2254
delay = client.approval_delay
1548
2255
client.approvals_pending += 1
1549
2256
approval_required = True
1550
2257
1551
2258
while True:
1552
2259
if not client.enabled:
1553
2260
logger.info("Client %s is disabled",
1554
client.name)
2261
client.name)
1555
2262
if self.server.use_dbus:
1556
2263
# Emit D-Bus signal
1557
2264
client.Rejected("Disabled")
1558
2265
return
1559
2266
1560
2267
if client.approved or not client.approval_delay:
1561
#We are approved or approval is disabled
2268
# We are approved or approval is disabled
1562
2269
break
1563
2270
elif client.approved is None:
1564
2271
logger.info("Client %s needs approval",
1566
2273
if self.server.use_dbus:
1567
2274
# Emit D-Bus signal
1568
2275
client.NeedApproval(
1569
client.approval_delay_milliseconds(),
1570
client.approved_by_default)
2276
client.approval_delay.total_seconds()
2277
* 1000, client.approved_by_default)
1571
2278
else:
1572
2279
logger.warning("Client %s was not approved",
1573
2280
client.name)
1575
2282
# Emit D-Bus signal
1576
2283
client.Rejected("Denied")
1577
2284
return
1578
1579
#wait until timeout or approved
2285
2286
# wait until timeout or approved
1580
2287
time = datetime.datetime.now()
1581
2288
client.changedstate.acquire()
1582
(client.changedstate.wait
1583
(float(client.timedelta_to_milliseconds(delay)
1584
/ 1000)))
2289
client.changedstate.wait(delay.total_seconds())
1585
2290
client.changedstate.release()
1586
2291
time2 = datetime.datetime.now()
1587
2292
if (time2 - time) >= delay:
1597
2302
break
1598
2303
else:
1599
2304
delay -= time2 - time
1600
1601
sent_size = 0
1602
while sent_size < len(client.secret):
1603
try:
1604
sent = session.send(client.secret[sent_size:])
1605
except gnutls.errors.GNUTLSError as error:
1606
logger.warning("gnutls send failed")
1607
return
1608
logger.debug("Sent: %d, remaining: %d",
1609
sent, len(client.secret)
1610
- (sent_size + sent))
1611
sent_size += sent
1612
2305
2306
try:
2307
session.send(client.secret)
2308
except gnutls.Error as error:
2309
logger.warning("gnutls send failed",
2310
exc_info=error)
2311
return
2312
1613
2313
logger.info("Sending secret to %s", client.name)
1614
2314
# bump the timeout using extended_timeout
1615
client.checked_ok(client.extended_timeout)
2315
client.bump_timeout(client.extended_timeout)
1616
2316
if self.server.use_dbus:
1617
2317
# Emit D-Bus signal
1618
2318
client.GotSecret()
1619
2319
1620
2320
finally:
1621
2321
if approval_required:
1622
2322
client.approvals_pending -= 1
1623
2323
try:
1624
2324
session.bye()
1625
except gnutls.errors.GNUTLSError as error:
1626
logger.warning("GnuTLS bye failed")
1627
2325
except gnutls.Error as error:
2326
logger.warning("GnuTLS bye failed",
2327
exc_info=error)
2328
1628
2329
@staticmethod
1629
2330
def peer_certificate(session):
1630
2331
"Return the peer's OpenPGP certificate as a bytestring"
1631
2332
# If not an OpenPGP certificate...
1632
if (gnutls.library.functions
1633
.gnutls_certificate_type_get(session._c_object)
1634
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1635
# ...do the normal thing
1636
return session.peer_certificate
2333
if (gnutls.certificate_type_get(session._c_object)
2334
!= gnutls.CRT_OPENPGP):
2335
# ...return invalid data
2336
return b""
1637
2337
list_size = ctypes.c_uint(1)
1638
cert_list = (gnutls.library.functions
1639
.gnutls_certificate_get_peers
2338
cert_list = (gnutls.certificate_get_peers
1640
2339
(session._c_object, ctypes.byref(list_size)))
1641
2340
if not bool(cert_list) and list_size.value != 0:
1642
raise gnutls.errors.GNUTLSError("error getting peer"
1643
" certificate")
2341
raise gnutls.Error("error getting peer certificate")
1644
2342
if list_size.value == 0:
1645
2343
return None
1646
2344
cert = cert_list[0]
1647
2345
return ctypes.string_at(cert.data, cert.size)
1648
2346
1649
2347
@staticmethod
1650
2348
def fingerprint(openpgp):
1651
2349
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1652
2350
# New GnuTLS "datum" with the OpenPGP public key
1653
datum = (gnutls.library.types
1654
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1655
ctypes.POINTER
1656
(ctypes.c_ubyte)),
1657
ctypes.c_uint(len(openpgp))))
2351
datum = gnutls.datum_t(
2352
ctypes.cast(ctypes.c_char_p(openpgp),
2353
ctypes.POINTER(ctypes.c_ubyte)),
2354
ctypes.c_uint(len(openpgp)))
1658
2355
# New empty GnuTLS certificate
1659
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1660
(gnutls.library.functions
1661
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2356
crt = gnutls.openpgp_crt_t()
2357
gnutls.openpgp_crt_init(ctypes.byref(crt))
1662
2358
# Import the OpenPGP public key into the certificate
1663
(gnutls.library.functions
1664
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1665
gnutls.library.constants
1666
.GNUTLS_OPENPGP_FMT_RAW))
2359
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2360
gnutls.OPENPGP_FMT_RAW)
1667
2361
# Verify the self signature in the key
1668
2362
crtverify = ctypes.c_uint()
1669
(gnutls.library.functions
1670
.gnutls_openpgp_crt_verify_self(crt, 0,
1671
ctypes.byref(crtverify)))
2363
gnutls.openpgp_crt_verify_self(crt, 0,
2364
ctypes.byref(crtverify))
1672
2365
if crtverify.value != 0:
1673
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1674
raise (gnutls.errors.CertificateSecurityError
1675
("Verify failed"))
2366
gnutls.openpgp_crt_deinit(crt)
2367
raise gnutls.CertificateSecurityError("Verify failed")
1676
2368
# New buffer for the fingerprint
1677
2369
buf = ctypes.create_string_buffer(20)
1678
2370
buf_len = ctypes.c_size_t()
1679
2371
# Get the fingerprint from the certificate into the buffer
1680
(gnutls.library.functions
1681
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1682
ctypes.byref(buf_len)))
2372
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2373
ctypes.byref(buf_len))
1683
2374
# Deinit the certificate
1684
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2375
gnutls.openpgp_crt_deinit(crt)
1685
2376
# Convert the buffer to a Python bytestring
1686
2377
fpr = ctypes.string_at(buf, buf_len.value)
1687
2378
# Convert the bytestring to hexadecimal notation
1691
2382
1692
2383
class MultiprocessingMixIn(object):
1693
2384
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2385
1694
2386
def sub_process_main(self, request, address):
1695
2387
try:
1696
2388
self.finish_request(request, address)
1697
2389
except Exception:
1698
2390
self.handle_error(request, address)
1699
2391
self.close_request(request)
1700
2392
1701
2393
def process_request(self, request, address):
1702
2394
"""Start a new process to process the request."""
1703
proc = multiprocessing.Process(target = self.sub_process_main,
1704
args = (request,
1705
address))
2395
proc = multiprocessing.Process(target=self.sub_process_main,
2396
args=(request, address))
1706
2397
proc.start()
1707
2398
return proc
1708
2399
1709
2400
1710
2401
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1711
2402
""" adds a pipe to the MixIn """
2403
1712
2404
def process_request(self, request, client_address):
1713
2405
"""Overrides and wraps the original process_request().
1714
2406
1715
2407
This function creates a new pipe in self.pipe
1716
2408
"""
1717
2409
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1718
2410
1719
2411
proc = MultiprocessingMixIn.process_request(self, request,
1720
2412
client_address)
1721
2413
self.child_pipe.close()
1722
2414
self.add_pipe(parent_pipe, proc)
1723
2415
1724
2416
def add_pipe(self, parent_pipe, proc):
1725
2417
"""Dummy function; override as necessary"""
1726
raise NotImplementedError
2418
raise NotImplementedError()
1727
2419
1728
2420
1729
2421
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1730
2422
socketserver.TCPServer, object):
1731
2423
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1732
2424
1733
2425
Attributes:
1734
2426
enabled: Boolean; whether this server is activated yet
1735
2427
interface: None or a network interface name (string)
1736
2428
use_ipv6: Boolean; to use IPv6 or not
1737
2429
"""
2430
1738
2431
def __init__(self, server_address, RequestHandlerClass,
1739
interface=None, use_ipv6=True):
2432
interface=None,
2433
use_ipv6=True,
2434
socketfd=None):
2435
"""If socketfd is set, use that file descriptor instead of
2436
creating a new one with socket.socket().
2437
"""
1740
2438
self.interface = interface
1741
2439
if use_ipv6:
1742
2440
self.address_family = socket.AF_INET6
2441
if socketfd is not None:
2442
# Save the file descriptor
2443
self.socketfd = socketfd
2444
# Save the original socket.socket() function
2445
self.socket_socket = socket.socket
2446
2447
# To implement --socket, we monkey patch socket.socket.
2448
#
2449
# (When socketserver.TCPServer is a new-style class, we
2450
# could make self.socket into a property instead of monkey
2451
# patching socket.socket.)
2452
#
2453
# Create a one-time-only replacement for socket.socket()
2454
@functools.wraps(socket.socket)
2455
def socket_wrapper(*args, **kwargs):
2456
# Restore original function so subsequent calls are
2457
# not affected.
2458
socket.socket = self.socket_socket
2459
del self.socket_socket
2460
# This time only, return a new socket object from the
2461
# saved file descriptor.
2462
return socket.fromfd(self.socketfd, *args, **kwargs)
2463
# Replace socket.socket() function with wrapper
2464
socket.socket = socket_wrapper
2465
# The socketserver.TCPServer.__init__ will call
2466
# socket.socket(), which might be our replacement,
2467
# socket_wrapper(), if socketfd was set.
1743
2468
socketserver.TCPServer.__init__(self, server_address,
1744
2469
RequestHandlerClass)
2470
1745
2471
def server_bind(self):
1746
2472
"""This overrides the normal server_bind() function
1747
2473
to bind to an interface if one was specified, and also NOT to
1748
2474
bind to an address or port if they were not specified."""
2475
global SO_BINDTODEVICE
1749
2476
if self.interface is not None:
1750
2477
if SO_BINDTODEVICE is None:
1751
logger.error("SO_BINDTODEVICE does not exist;"
1752
" cannot bind to interface %s",
1753
self.interface)
1754
else:
1755
try:
1756
self.socket.setsockopt(socket.SOL_SOCKET,
1757
SO_BINDTODEVICE,
1758
str(self.interface
1759
+ '\0'))
1760
except socket.error as error:
1761
if error[0] == errno.EPERM:
1762
logger.error("No permission to"
1763
" bind to interface %s",
1764
self.interface)
1765
elif error[0] == errno.ENOPROTOOPT:
1766
logger.error("SO_BINDTODEVICE not available;"
1767
" cannot bind to interface %s",
1768
self.interface)
1769
else:
1770
raise
2478
# Fall back to a hard-coded value which seems to be
2479
# common enough.
2480
logger.warning("SO_BINDTODEVICE not found, trying 25")
2481
SO_BINDTODEVICE = 25
2482
try:
2483
self.socket.setsockopt(
2484
socket.SOL_SOCKET, SO_BINDTODEVICE,
2485
(self.interface + "\0").encode("utf-8"))
2486
except socket.error as error:
2487
if error.errno == errno.EPERM:
2488
logger.error("No permission to bind to"
2489
" interface %s", self.interface)
2490
elif error.errno == errno.ENOPROTOOPT:
2491
logger.error("SO_BINDTODEVICE not available;"
2492
" cannot bind to interface %s",
2493
self.interface)
2494
elif error.errno == errno.ENODEV:
2495
logger.error("Interface %s does not exist,"
2496
" cannot bind", self.interface)
2497
else:
2498
raise
1771
2499
# Only bind(2) the socket if we really need to.
1772
2500
if self.server_address[0] or self.server_address[1]:
1773
2501
if not self.server_address[0]:
1774
2502
if self.address_family == socket.AF_INET6:
1775
any_address = "::" # in6addr_any
2503
any_address = "::" # in6addr_any
1776
2504
else:
1777
any_address = socket.INADDR_ANY
2505
any_address = "0.0.0.0" # INADDR_ANY
1778
2506
self.server_address = (any_address,
1779
2507
self.server_address[1])
1780
2508
elif not self.server_address[1]:
1781
self.server_address = (self.server_address[0],
1782
0)
2509
self.server_address = (self.server_address[0], 0)
1783
2510
# if self.interface:
1784
2511
# self.server_address = (self.server_address[0],
1785
2512
# 0, # port
1791
2518
1792
2519
class MandosServer(IPv6_TCPServer):
1793
2520
"""Mandos server.
1794
2521
1795
2522
Attributes:
1796
2523
clients: set of Client objects
1797
2524
gnutls_priority GnuTLS priority string
1798
2525
use_dbus: Boolean; to emit D-Bus signals or not
1799
1800
Assumes a gobject.MainLoop event loop.
2526
2527
Assumes a GLib.MainLoop event loop.
1801
2528
"""
2529
1802
2530
def __init__(self, server_address, RequestHandlerClass,
1803
interface=None, use_ipv6=True, clients=None,
1804
gnutls_priority=None, use_dbus=True):
2531
interface=None,
2532
use_ipv6=True,
2533
clients=None,
2534
gnutls_priority=None,
2535
use_dbus=True,
2536
socketfd=None):
1805
2537
self.enabled = False
1806
2538
self.clients = clients
1807
2539
if self.clients is None:
1810
2542
self.gnutls_priority = gnutls_priority
1811
2543
IPv6_TCPServer.__init__(self, server_address,
1812
2544
RequestHandlerClass,
1813
interface = interface,
1814
use_ipv6 = use_ipv6)
2545
interface=interface,
2546
use_ipv6=use_ipv6,
2547
socketfd=socketfd)
2548
1815
2549
def server_activate(self):
1816
2550
if self.enabled:
1817
2551
return socketserver.TCPServer.server_activate(self)
1818
2552
1819
2553
def enable(self):
1820
2554
self.enabled = True
1821
2555
1822
2556
def add_pipe(self, parent_pipe, proc):
1823
2557
# Call "handle_ipc" for both data and EOF events
1824
gobject.io_add_watch(parent_pipe.fileno(),
1825
gobject.IO_IN | gobject.IO_HUP,
1826
functools.partial(self.handle_ipc,
1827
parent_pipe =
1828
parent_pipe,
1829
proc = proc))
1830
1831
def handle_ipc(self, source, condition, parent_pipe=None,
1832
proc = None, client_object=None):
1833
condition_names = {
1834
gobject.IO_IN: "IN", # There is data to read.
1835
gobject.IO_OUT: "OUT", # Data can be written (without
1836
# blocking).
1837
gobject.IO_PRI: "PRI", # There is urgent data to read.
1838
gobject.IO_ERR: "ERR", # Error condition.
1839
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1840
# broken, usually for pipes and
1841
# sockets).
1842
}
1843
conditions_string = ' | '.join(name
1844
for cond, name in
1845
condition_names.iteritems()
1846
if cond & condition)
2558
GLib.io_add_watch(
2559
parent_pipe.fileno(),
2560
GLib.IO_IN | GLib.IO_HUP,
2561
functools.partial(self.handle_ipc,
2562
parent_pipe=parent_pipe,
2563
proc=proc))
2564
2565
def handle_ipc(self, source, condition,
2566
parent_pipe=None,
2567
proc=None,
2568
client_object=None):
1847
2569
# error, or the other end of multiprocessing.Pipe has closed
1848
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2570
if condition & (GLib.IO_ERR | GLib.IO_HUP):
1849
2571
# Wait for other process to exit
1850
2572
proc.join()
1851
2573
return False
1852
2574
1853
2575
# Read a request from the child
1854
2576
request = parent_pipe.recv()
1855
2577
command = request[0]
1856
2578
1857
2579
if command == 'init':
1858
2580
fpr = request[1]
1859
2581
address = request[2]
1860
1861
for c in self.clients.itervalues():
2582
2583
for c in self.clients.values():
1862
2584
if c.fingerprint == fpr:
1863
2585
client = c
1864
2586
break
1871
2593
address[0])
1872
2594
parent_pipe.send(False)
1873
2595
return False
1874
1875
gobject.io_add_watch(parent_pipe.fileno(),
1876
gobject.IO_IN | gobject.IO_HUP,
1877
functools.partial(self.handle_ipc,
1878
parent_pipe =
1879
parent_pipe,
1880
proc = proc,
1881
client_object =
1882
client))
2596
2597
GLib.io_add_watch(
2598
parent_pipe.fileno(),
2599
GLib.IO_IN | GLib.IO_HUP,
2600
functools.partial(self.handle_ipc,
2601
parent_pipe=parent_pipe,
2602
proc=proc,
2603
client_object=client))
1883
2604
parent_pipe.send(True)
1884
2605
# remove the old hook in favor of the new above hook on
1885
2606
# same fileno
1888
2609
funcname = request[1]
1889
2610
args = request[2]
1890
2611
kwargs = request[3]
1891
2612
1892
2613
parent_pipe.send(('data', getattr(client_object,
1893
2614
funcname)(*args,
1894
**kwargs)))
1895
2615
**kwargs)))
2616
1896
2617
if command == 'getattr':
1897
2618
attrname = request[1]
1898
if callable(client_object.__getattribute__(attrname)):
1899
parent_pipe.send(('function',))
2619
if isinstance(client_object.__getattribute__(attrname),
2620
collections.Callable):
2621
parent_pipe.send(('function', ))
1900
2622
else:
1901
parent_pipe.send(('data', client_object
1902
.__getattribute__(attrname)))
1903
2623
parent_pipe.send((
2624
'data', client_object.__getattribute__(attrname)))
2625
1904
2626
if command == 'setattr':
1905
2627
attrname = request[1]
1906
2628
value = request[2]
1907
2629
setattr(client_object, attrname, value)
1908
2630
1909
2631
return True
1910
2632
1911
2633
2634
def rfc3339_duration_to_delta(duration):
2635
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2636
2637
>>> rfc3339_duration_to_delta("P7D")
2638
datetime.timedelta(7)
2639
>>> rfc3339_duration_to_delta("PT60S")
2640
datetime.timedelta(0, 60)
2641
>>> rfc3339_duration_to_delta("PT60M")
2642
datetime.timedelta(0, 3600)
2643
>>> rfc3339_duration_to_delta("PT24H")
2644
datetime.timedelta(1)
2645
>>> rfc3339_duration_to_delta("P1W")
2646
datetime.timedelta(7)
2647
>>> rfc3339_duration_to_delta("PT5M30S")
2648
datetime.timedelta(0, 330)
2649
>>> rfc3339_duration_to_delta("P1DT3M20S")
2650
datetime.timedelta(1, 200)
2651
"""
2652
2653
# Parsing an RFC 3339 duration with regular expressions is not
2654
# possible - there would have to be multiple places for the same
2655
# values, like seconds. The current code, while more esoteric, is
2656
# cleaner without depending on a parsing library. If Python had a
2657
# built-in library for parsing we would use it, but we'd like to
2658
# avoid excessive use of external libraries.
2659
2660
# New type for defining tokens, syntax, and semantics all-in-one
2661
Token = collections.namedtuple("Token", (
2662
"regexp", # To match token; if "value" is not None, must have
2663
# a "group" containing digits
2664
"value", # datetime.timedelta or None
2665
"followers")) # Tokens valid after this token
2666
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2667
# the "duration" ABNF definition in RFC 3339, Appendix A.
2668
token_end = Token(re.compile(r"$"), None, frozenset())
2669
token_second = Token(re.compile(r"(\d+)S"),
2670
datetime.timedelta(seconds=1),
2671
frozenset((token_end, )))
2672
token_minute = Token(re.compile(r"(\d+)M"),
2673
datetime.timedelta(minutes=1),
2674
frozenset((token_second, token_end)))
2675
token_hour = Token(re.compile(r"(\d+)H"),
2676
datetime.timedelta(hours=1),
2677
frozenset((token_minute, token_end)))
2678
token_time = Token(re.compile(r"T"),
2679
None,
2680
frozenset((token_hour, token_minute,
2681
token_second)))
2682
token_day = Token(re.compile(r"(\d+)D"),
2683
datetime.timedelta(days=1),
2684
frozenset((token_time, token_end)))
2685
token_month = Token(re.compile(r"(\d+)M"),
2686
datetime.timedelta(weeks=4),
2687
frozenset((token_day, token_end)))
2688
token_year = Token(re.compile(r"(\d+)Y"),
2689
datetime.timedelta(weeks=52),
2690
frozenset((token_month, token_end)))
2691
token_week = Token(re.compile(r"(\d+)W"),
2692
datetime.timedelta(weeks=1),
2693
frozenset((token_end, )))
2694
token_duration = Token(re.compile(r"P"), None,
2695
frozenset((token_year, token_month,
2696
token_day, token_time,
2697
token_week)))
2698
# Define starting values:
2699
# Value so far
2700
value = datetime.timedelta()
2701
found_token = None
2702
# Following valid tokens
2703
followers = frozenset((token_duration, ))
2704
# String left to parse
2705
s = duration
2706
# Loop until end token is found
2707
while found_token is not token_end:
2708
# Search for any currently valid tokens
2709
for token in followers:
2710
match = token.regexp.match(s)
2711
if match is not None:
2712
# Token found
2713
if token.value is not None:
2714
# Value found, parse digits
2715
factor = int(match.group(1), 10)
2716
# Add to value so far
2717
value += factor * token.value
2718
# Strip token from string
2719
s = token.regexp.sub("", s, 1)
2720
# Go to found token
2721
found_token = token
2722
# Set valid next tokens
2723
followers = found_token.followers
2724
break
2725
else:
2726
# No currently valid tokens were found
2727
raise ValueError("Invalid RFC 3339 duration: {!r}"
2728
.format(duration))
2729
# End token found
2730
return value
2731
2732
1912
2733
def string_to_delta(interval):
1913
2734
"""Parse a string and return a datetime.timedelta
1914
2735
1915
2736
>>> string_to_delta('7d')
1916
2737
datetime.timedelta(7)
1917
2738
>>> string_to_delta('60s')
1925
2746
>>> string_to_delta('5m 30s')
1926
2747
datetime.timedelta(0, 330)
1927
2748
"""
2749
2750
try:
2751
return rfc3339_duration_to_delta(interval)
2752
except ValueError:
2753
pass
2754
1928
2755
timevalue = datetime.timedelta(0)
1929
2756
for s in interval.split():
1930
2757
try:
1931
suffix = unicode(s[-1])
2758
suffix = s[-1]
1932
2759
value = int(s[:-1])
1933
2760
if suffix == "d":
1934
2761
delta = datetime.timedelta(value)
1941
2768
elif suffix == "w":
1942
2769
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1943
2770
else:
1944
raise ValueError("Unknown suffix %r" % suffix)
1945
except (ValueError, IndexError) as e:
2771
raise ValueError("Unknown suffix {!r}".format(suffix))
2772
except IndexError as e:
1946
2773
raise ValueError(*(e.args))
1947
2774
timevalue += delta
1948
2775
return timevalue
1949
2776
1950
2777
1951
def daemon(nochdir = False, noclose = False):
2778
def daemon(nochdir=False, noclose=False):
1952
2779
"""See daemon(3). Standard BSD Unix function.
1953
2780
1954
2781
This should really exist as os.daemon, but it doesn't (yet)."""
1955
2782
if os.fork():
1956
2783
sys.exit()
1961
2788
sys.exit()
1962
2789
if not noclose:
1963
2790
# Close all standard open file descriptors
1964
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2791
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1965
2792
if not stat.S_ISCHR(os.fstat(null).st_mode):
1966
2793
raise OSError(errno.ENODEV,
1967
"%s not a character device"
1968
% os.path.devnull)
2794
"{} not a character device"
2795
.format(os.devnull))
1969
2796
os.dup2(null, sys.stdin.fileno())
1970
2797
os.dup2(null, sys.stdout.fileno())
1971
2798
os.dup2(null, sys.stderr.fileno())
1974
2801
1975
2802
1976
2803
def main():
1977
2804
1978
2805
##################################################################
1979
2806
# Parsing of options, both command line and config file
1980
2807
1981
2808
parser = argparse.ArgumentParser()
1982
2809
parser.add_argument("-v", "--version", action="version",
1983
version = "%%(prog)s %s" % version,
2810
version="%(prog)s {}".format(version),
1984
2811
help="show version number and exit")
1985
2812
parser.add_argument("-i", "--interface", metavar="IF",
1986
2813
help="Bind to interface IF")
1992
2819
help="Run self-test")
1993
2820
parser.add_argument("--debug", action="store_true",
1994
2821
help="Debug mode; run in foreground and log"
1995
" to terminal")
2822
" to terminal", default=None)
1996
2823
parser.add_argument("--debuglevel", metavar="LEVEL",
1997
2824
help="Debug level for stdout output")
1998
2825
parser.add_argument("--priority", help="GnuTLS"
2005
2832
" files")
2006
2833
parser.add_argument("--no-dbus", action="store_false",
2007
2834
dest="use_dbus", help="Do not provide D-Bus"
2008
" system bus interface")
2835
" system bus interface", default=None)
2009
2836
parser.add_argument("--no-ipv6", action="store_false",
2010
dest="use_ipv6", help="Do not use IPv6")
2837
dest="use_ipv6", help="Do not use IPv6",
2838
default=None)
2011
2839
parser.add_argument("--no-restore", action="store_false",
2012
2840
dest="restore", help="Do not restore stored"
2013
" state")
2841
" state", default=None)
2842
parser.add_argument("--socket", type=int,
2843
help="Specify a file descriptor to a network"
2844
" socket to use instead of creating one")
2014
2845
parser.add_argument("--statedir", metavar="DIR",
2015
2846
help="Directory to save/restore state in")
2016
2847
parser.add_argument("--foreground", action="store_true",
2848
help="Run in foreground", default=None)
2849
parser.add_argument("--no-zeroconf", action="store_false",
2850
dest="zeroconf", help="Do not use Zeroconf",
2851
default=None)
2852
2017
2853
options = parser.parse_args()
2018
2854
2019
2855
if options.check:
2020
2856
import doctest
2021
doctest.testmod()
2022
sys.exit()
2023
2857
fail_count, test_count = doctest.testmod()
2858
sys.exit(os.EX_OK if fail_count == 0 else 1)
2859
2024
2860
# Default values for config file for server-global settings
2025
server_defaults = { "interface": "",
2026
"address": "",
2027
"port": "",
2028
"debug": "False",
2029
"priority":
2030
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2031
"servicename": "Mandos",
2032
"use_dbus": "True",
2033
"use_ipv6": "True",
2034
"debuglevel": "",
2035
"restore": "True",
2036
"statedir": "/var/lib/mandos"
2037
}
2038
2861
server_defaults = {"interface": "",
2862
"address": "",
2863
"port": "",
2864
"debug": "False",
2865
"priority":
2866
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2867
":+SIGN-DSA-SHA256",
2868
"servicename": "Mandos",
2869
"use_dbus": "True",
2870
"use_ipv6": "True",
2871
"debuglevel": "",
2872
"restore": "True",
2873
"socket": "",
2874
"statedir": "/var/lib/mandos",
2875
"foreground": "False",
2876
"zeroconf": "True",
2877
}
2878
2039
2879
# Parse config file for server-global settings
2040
2880
server_config = configparser.SafeConfigParser(server_defaults)
2041
2881
del server_defaults
2042
server_config.read(os.path.join(options.configdir,
2043
"mandos.conf"))
2882
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2044
2883
# Convert the SafeConfigParser object to a dict
2045
2884
server_settings = server_config.defaults()
2046
2885
# Use the appropriate methods on the non-string config options
2047
for option in ("debug", "use_dbus", "use_ipv6"):
2886
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2048
2887
server_settings[option] = server_config.getboolean("DEFAULT",
2049
2888
option)
2050
2889
if server_settings["port"]:
2051
2890
server_settings["port"] = server_config.getint("DEFAULT",
2052
2891
"port")
2892
if server_settings["socket"]:
2893
server_settings["socket"] = server_config.getint("DEFAULT",
2894
"socket")
2895
# Later, stdin will, and stdout and stderr might, be dup'ed
2896
# over with an opened os.devnull. But we don't want this to
2897
# happen with a supplied network socket.
2898
if 0 <= server_settings["socket"] <= 2:
2899
server_settings["socket"] = os.dup(server_settings
2900
["socket"])
2053
2901
del server_config
2054
2902
2055
2903
# Override the settings from the config file with command line
2056
2904
# options, if set.
2057
2905
for option in ("interface", "address", "port", "debug",
2058
"priority", "servicename", "configdir",
2059
"use_dbus", "use_ipv6", "debuglevel", "restore",
2060
"statedir"):
2906
"priority", "servicename", "configdir", "use_dbus",
2907
"use_ipv6", "debuglevel", "restore", "statedir",
2908
"socket", "foreground", "zeroconf"):
2061
2909
value = getattr(options, option)
2062
2910
if value is not None:
2063
2911
server_settings[option] = value
2064
2912
del options
2065
2913
# Force all strings to be unicode
2066
2914
for option in server_settings.keys():
2067
if type(server_settings[option]) is str:
2068
server_settings[option] = unicode(server_settings[option])
2915
if isinstance(server_settings[option], bytes):
2916
server_settings[option] = (server_settings[option]
2917
.decode("utf-8"))
2918
# Force all boolean options to be boolean
2919
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2920
"foreground", "zeroconf"):
2921
server_settings[option] = bool(server_settings[option])
2922
# Debug implies foreground
2923
if server_settings["debug"]:
2924
server_settings["foreground"] = True
2069
2925
# Now we have our good server settings in "server_settings"
2070
2926
2071
2927
##################################################################
2072
2928
2929
if (not server_settings["zeroconf"]
2930
and not (server_settings["port"]
2931
or server_settings["socket"] != "")):
2932
parser.error("Needs port or socket to work without Zeroconf")
2933
2073
2934
# For convenience
2074
2935
debug = server_settings["debug"]
2075
2936
debuglevel = server_settings["debuglevel"]
2077
2938
use_ipv6 = server_settings["use_ipv6"]
2078
2939
stored_state_path = os.path.join(server_settings["statedir"],
2079
2940
stored_state_file)
2080
2941
foreground = server_settings["foreground"]
2942
zeroconf = server_settings["zeroconf"]
2943
2081
2944
if debug:
2082
2945
initlogger(debug, logging.DEBUG)
2083
2946
else:
2086
2949
else:
2087
2950
level = getattr(logging, debuglevel.upper())
2088
2951
initlogger(debug, level)
2089
2952
2090
2953
if server_settings["servicename"] != "Mandos":
2091
syslogger.setFormatter(logging.Formatter
2092
('Mandos (%s) [%%(process)d]:'
2093
' %%(levelname)s: %%(message)s'
2094
% server_settings["servicename"]))
2095
2954
syslogger.setFormatter(
2955
logging.Formatter('Mandos ({}) [%(process)d]:'
2956
' %(levelname)s: %(message)s'.format(
2957
server_settings["servicename"])))
2958
2096
2959
# Parse config file with clients
2097
client_config = configparser.SafeConfigParser(Client.client_defaults)
2960
client_config = configparser.SafeConfigParser(Client
2961
.client_defaults)
2098
2962
client_config.read(os.path.join(server_settings["configdir"],
2099
2963
"clients.conf"))
2100
2964
2101
2965
global mandos_dbus_service
2102
2966
mandos_dbus_service = None
2103
2104
tcp_server = MandosServer((server_settings["address"],
2105
server_settings["port"]),
2106
ClientHandler,
2107
interface=(server_settings["interface"]
2108
or None),
2109
use_ipv6=use_ipv6,
2110
gnutls_priority=
2111
server_settings["priority"],
2112
use_dbus=use_dbus)
2113
if not debug:
2114
pidfilename = "/var/run/mandos.pid"
2115
try:
2116
pidfile = open(pidfilename, "w")
2117
except IOError:
2118
logger.error("Could not open file %r", pidfilename)
2119
2120
try:
2121
uid = pwd.getpwnam("_mandos").pw_uid
2122
gid = pwd.getpwnam("_mandos").pw_gid
2123
except KeyError:
2124
try:
2125
uid = pwd.getpwnam("mandos").pw_uid
2126
gid = pwd.getpwnam("mandos").pw_gid
2967
2968
socketfd = None
2969
if server_settings["socket"] != "":
2970
socketfd = server_settings["socket"]
2971
tcp_server = MandosServer(
2972
(server_settings["address"], server_settings["port"]),
2973
ClientHandler,
2974
interface=(server_settings["interface"] or None),
2975
use_ipv6=use_ipv6,
2976
gnutls_priority=server_settings["priority"],
2977
use_dbus=use_dbus,
2978
socketfd=socketfd)
2979
if not foreground:
2980
pidfilename = "/run/mandos.pid"
2981
if not os.path.isdir("/run/."):
2982
pidfilename = "/var/run/mandos.pid"
2983
pidfile = None
2984
try:
2985
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2986
except IOError as e:
2987
logger.error("Could not open file %r", pidfilename,
2988
exc_info=e)
2989
2990
for name, group in (("_mandos", "_mandos"),
2991
("mandos", "mandos"),
2992
("nobody", "nogroup")):
2993
try:
2994
uid = pwd.getpwnam(name).pw_uid
2995
gid = pwd.getpwnam(group).pw_gid
2996
break
2127
2997
except KeyError:
2128
try:
2129
uid = pwd.getpwnam("nobody").pw_uid
2130
gid = pwd.getpwnam("nobody").pw_gid
2131
except KeyError:
2132
uid = 65534
2133
gid = 65534
2998
continue
2999
else:
3000
uid = 65534
3001
gid = 65534
2134
3002
try:
2135
3003
os.setgid(gid)
2136
3004
os.setuid(uid)
3005
if debug:
3006
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3007
gid))
2137
3008
except OSError as error:
2138
if error[0] != errno.EPERM:
2139
raise error
2140
3009
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3010
.format(uid, gid, os.strerror(error.errno)))
3011
if error.errno != errno.EPERM:
3012
raise
3013
2141
3014
if debug:
2142
3015
# Enable all possible GnuTLS debugging
2143
3016
2144
3017
# "Use a log level over 10 to enable all debugging options."
2145
3018
# - GnuTLS manual
2146
gnutls.library.functions.gnutls_global_set_log_level(11)
2147
2148
@gnutls.library.types.gnutls_log_func
3019
gnutls.global_set_log_level(11)
3020
3021
@gnutls.log_func
2149
3022
def debug_gnutls(level, string):
2150
3023
logger.debug("GnuTLS: %s", string[:-1])
2151
2152
(gnutls.library.functions
2153
.gnutls_global_set_log_function(debug_gnutls))
2154
3024
3025
gnutls.global_set_log_function(debug_gnutls)
3026
2155
3027
# Redirect stdin so all checkers get /dev/null
2156
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3028
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2157
3029
os.dup2(null, sys.stdin.fileno())
2158
3030
if null > 2:
2159
3031
os.close(null)
2160
3032
2161
3033
# Need to fork before connecting to D-Bus
2162
if not debug:
3034
if not foreground:
2163
3035
# Close all input and output, do double fork, etc.
2164
3036
daemon()
2165
2166
gobject.threads_init()
2167
3037
3038
# multiprocessing will use threads, so before we use GLib we need
3039
# to inform GLib that threads will be used.
3040
GLib.threads_init()
3041
2168
3042
global main_loop
2169
3043
# From the Avahi example code
2170
DBusGMainLoop(set_as_default=True )
2171
main_loop = gobject.MainLoop()
3044
DBusGMainLoop(set_as_default=True)
3045
main_loop = GLib.MainLoop()
2172
3046
bus = dbus.SystemBus()
2173
3047
# End of Avahi example code
2174
3048
if use_dbus:
2175
3049
try:
2176
3050
bus_name = dbus.service.BusName("se.recompile.Mandos",
2177
bus, do_not_queue=True)
2178
old_bus_name = (dbus.service.BusName
2179
("se.bsnet.fukt.Mandos", bus,
2180
do_not_queue=True))
2181
except dbus.exceptions.NameExistsException as e:
2182
logger.error(unicode(e) + ", disabling D-Bus")
3051
bus,
3052
do_not_queue=True)
3053
old_bus_name = dbus.service.BusName(
3054
"se.bsnet.fukt.Mandos", bus,
3055
do_not_queue=True)
3056
except dbus.exceptions.DBusException as e:
3057
logger.error("Disabling D-Bus:", exc_info=e)
2183
3058
use_dbus = False
2184
3059
server_settings["use_dbus"] = False
2185
3060
tcp_server.use_dbus = False
2186
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2187
service = AvahiServiceToSyslog(name =
2188
server_settings["servicename"],
2189
servicetype = "_mandos._tcp",
2190
protocol = protocol, bus = bus)
2191
if server_settings["interface"]:
2192
service.interface = (if_nametoindex
2193
(str(server_settings["interface"])))
2194
3061
if zeroconf:
3062
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3063
service = AvahiServiceToSyslog(
3064
name=server_settings["servicename"],
3065
servicetype="_mandos._tcp",
3066
protocol=protocol,
3067
bus=bus)
3068
if server_settings["interface"]:
3069
service.interface = if_nametoindex(
3070
server_settings["interface"].encode("utf-8"))
3071
2195
3072
global multiprocessing_manager
2196
3073
multiprocessing_manager = multiprocessing.Manager()
2197
3074
2198
3075
client_class = Client
2199
3076
if use_dbus:
2200
client_class = functools.partial(ClientDBusTransitional,
2201
bus = bus)
2202
3077
client_class = functools.partial(ClientDBus, bus=bus)
3078
2203
3079
client_settings = Client.config_parser(client_config)
2204
3080
old_client_settings = {}
2205
3081
clients_data = {}
2206
3082
3083
# This is used to redirect stdout and stderr for checker processes
3084
global wnull
3085
wnull = open(os.devnull, "w") # A writable /dev/null
3086
# Only used if server is running in foreground but not in debug
3087
# mode
3088
if debug or not foreground:
3089
wnull.close()
3090
2207
3091
# Get client data and settings from last running state.
2208
3092
if server_settings["restore"]:
2209
3093
try:
2210
3094
with open(stored_state_path, "rb") as stored_state:
2211
clients_data, old_client_settings = (pickle.load
2212
(stored_state))
3095
if sys.version_info.major == 2:
3096
clients_data, old_client_settings = pickle.load(
3097
stored_state)
3098
else:
3099
bytes_clients_data, bytes_old_client_settings = (
3100
pickle.load(stored_state, encoding="bytes"))
3101
# Fix bytes to strings
3102
# clients_data
3103
# .keys()
3104
clients_data = {(key.decode("utf-8")
3105
if isinstance(key, bytes)
3106
else key): value
3107
for key, value in
3108
bytes_clients_data.items()}
3109
del bytes_clients_data
3110
for key in clients_data:
3111
value = {(k.decode("utf-8")
3112
if isinstance(k, bytes) else k): v
3113
for k, v in
3114
clients_data[key].items()}
3115
clients_data[key] = value
3116
# .client_structure
3117
value["client_structure"] = [
3118
(s.decode("utf-8")
3119
if isinstance(s, bytes)
3120
else s) for s in
3121
value["client_structure"]]
3122
# .name & .host
3123
for k in ("name", "host"):
3124
if isinstance(value[k], bytes):
3125
value[k] = value[k].decode("utf-8")
3126
# old_client_settings
3127
# .keys()
3128
old_client_settings = {
3129
(key.decode("utf-8")
3130
if isinstance(key, bytes)
3131
else key): value
3132
for key, value in
3133
bytes_old_client_settings.items()}
3134
del bytes_old_client_settings
3135
# .host
3136
for value in old_client_settings.values():
3137
if isinstance(value["host"], bytes):
3138
value["host"] = (value["host"]
3139
.decode("utf-8"))
2213
3140
os.remove(stored_state_path)
2214
3141
except IOError as e:
2215
logger.warning("Could not load persistent state: {0}"
2216
.format(e))
2217
if e.errno != errno.ENOENT:
3142
if e.errno == errno.ENOENT:
3143
logger.warning("Could not load persistent state:"
3144
" {}".format(os.strerror(e.errno)))
3145
else:
3146
logger.critical("Could not load persistent state:",
3147
exc_info=e)
2218
3148
raise
2219
3149
except EOFError as e:
2220
3150
logger.warning("Could not load persistent state: "
2221
"EOFError: {0}".format(e))
2222
3151
"EOFError:",
3152
exc_info=e)
3153
2223
3154
with PGPEngine() as pgp:
2224
for client_name, client in clients_data.iteritems():
3155
for client_name, client in clients_data.items():
3156
# Skip removed clients
3157
if client_name not in client_settings:
3158
continue
3159
2225
3160
# Decide which value to use after restoring saved state.
2226
3161
# We have three different values: Old config file,
2227
3162
# new config file, and saved state.
2232
3167
# For each value in new config, check if it
2233
3168
# differs from the old config value (Except for
2234
3169
# the "secret" attribute)
2235
if (name != "secret" and
2236
value != old_client_settings[client_name]
2237
[name]):
3170
if (name != "secret"
3171
and (value !=
3172
old_client_settings[client_name][name])):
2238
3173
client[name] = value
2239
3174
except KeyError:
2240
3175
pass
2241
3176
2242
3177
# Clients who has passed its expire date can still be
2243
# enabled if its last checker was successful. Clients
2244
# whose checker failed before we stored its state is
2245
# assumed to have failed all checkers during downtime.
3178
# enabled if its last checker was successful. A Client
3179
# whose checker succeeded before we stored its state is
3180
# assumed to have successfully run all checkers during
3181
# downtime.
2246
3182
if client["enabled"]:
2247
3183
if datetime.datetime.utcnow() >= client["expires"]:
2248
3184
if not client["last_checked_ok"]:
2249
3185
logger.warning(
2250
"disabling client {0} - Client never "
2251
"performed a successfull checker"
2252
.format(client["name"]))
3186
"disabling client {} - Client never "
3187
"performed a successful checker".format(
3188
client_name))
2253
3189
client["enabled"] = False
2254
3190
elif client["last_checker_status"] != 0:
2255
3191
logger.warning(
2256
"disabling client {0} - Client "
2257
"last checker failed with error code {1}"
2258
.format(client["name"],
2259
client["last_checker_status"]))
3192
"disabling client {} - Client last"
3193
" checker failed with error code"
3194
" {}".format(
3195
client_name,
3196
client["last_checker_status"]))
2260
3197
client["enabled"] = False
2261
3198
else:
2262
client["expires"] = (datetime.datetime
2263
.utcnow()
2264
+ client["timeout"])
2265
3199
client["expires"] = (
3200
datetime.datetime.utcnow()
3201
+ client["timeout"])
3202
logger.debug("Last checker succeeded,"
3203
" keeping {} enabled".format(
3204
client_name))
2266
3205
try:
2267
client["secret"] = (
2268
pgp.decrypt(client["encrypted_secret"],
2269
client_settings[client_name]
2270
["secret"]))
3206
client["secret"] = pgp.decrypt(
3207
client["encrypted_secret"],
3208
client_settings[client_name]["secret"])
2271
3209
except PGPError:
2272
3210
# If decryption fails, we use secret from new settings
2273
logger.debug("Failed to decrypt {0} old secret"
2274
.format(client_name))
2275
client["secret"] = (
2276
client_settings[client_name]["secret"])
3211
logger.debug("Failed to decrypt {} old secret".format(
3212
client_name))
3213
client["secret"] = (client_settings[client_name]
3214
["secret"])
2277
3215
2278
2279
3216
# Add/remove clients based on new changes made to config
2280
for client_name in set(old_client_settings) - set(client_settings):
3217
for client_name in (set(old_client_settings)
3218
- set(client_settings)):
2281
3219
del clients_data[client_name]
2282
for client_name in set(client_settings) - set(old_client_settings):
3220
for client_name in (set(client_settings)
3221
- set(old_client_settings)):
2283
3222
clients_data[client_name] = client_settings[client_name]
2284
3223
2285
# Create clients all clients
2286
for client_name, client in clients_data.iteritems():
3224
# Create all client objects
3225
for client_name, client in clients_data.items():
2287
3226
tcp_server.clients[client_name] = client_class(
2288
name = client_name, settings = client)
2289
3227
name=client_name,
3228
settings=client,
3229
server_settings=server_settings)
3230
2290
3231
if not tcp_server.clients:
2291
3232
logger.warning("No clients defined")
2292
2293
if not debug:
2294
try:
2295
with pidfile:
2296
pid = os.getpid()
2297
pidfile.write(str(pid) + "\n".encode("utf-8"))
2298
del pidfile
2299
except IOError:
2300
logger.error("Could not write to file %r with PID %d",
2301
pidfilename, pid)
2302
except NameError:
2303
# "pidfile" was never created
2304
pass
3233
3234
if not foreground:
3235
if pidfile is not None:
3236
pid = os.getpid()
3237
try:
3238
with pidfile:
3239
print(pid, file=pidfile)
3240
except IOError:
3241
logger.error("Could not write to file %r with PID %d",
3242
pidfilename, pid)
3243
del pidfile
2305
3244
del pidfilename
2306
signal.signal(signal.SIGINT, signal.SIG_IGN)
2307
2308
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2309
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2310
3245
3246
for termsig in (signal.SIGHUP, signal.SIGTERM):
3247
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3248
lambda: main_loop.quit() and False)
3249
2311
3250
if use_dbus:
2312
class MandosDBusService(dbus.service.Object):
3251
3252
@alternate_dbus_interfaces(
3253
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3254
class MandosDBusService(DBusObjectWithObjectManager):
2313
3255
"""A D-Bus proxy object"""
3256
2314
3257
def __init__(self):
2315
3258
dbus.service.Object.__init__(self, bus, "/")
3259
2316
3260
_interface = "se.recompile.Mandos"
2317
3261
2318
3262
@dbus.service.signal(_interface, signature="o")
2319
3263
def ClientAdded(self, objpath):
2320
3264
"D-Bus signal"
2321
3265
pass
2322
3266
2323
3267
@dbus.service.signal(_interface, signature="ss")
2324
3268
def ClientNotFound(self, fingerprint, address):
2325
3269
"D-Bus signal"
2326
3270
pass
2327
3271
3272
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3273
"true"})
2328
3274
@dbus.service.signal(_interface, signature="os")
2329
3275
def ClientRemoved(self, objpath, name):
2330
3276
"D-Bus signal"
2331
3277
pass
2332
3278
3279
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3280
"true"})
2333
3281
@dbus.service.method(_interface, out_signature="ao")
2334
3282
def GetAllClients(self):
2335
3283
"D-Bus method"
2336
return dbus.Array(c.dbus_object_path
2337
for c in
2338
tcp_server.clients.itervalues())
2339
3284
return dbus.Array(c.dbus_object_path for c in
3285
tcp_server.clients.values())
3286
3287
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3288
"true"})
2340
3289
@dbus.service.method(_interface,
2341
3290
out_signature="a{oa{sv}}")
2342
3291
def GetAllClientsWithProperties(self):
2343
3292
"D-Bus method"
2344
3293
return dbus.Dictionary(
2345
((c.dbus_object_path, c.GetAll(""))
2346
for c in tcp_server.clients.itervalues()),
3294
{c.dbus_object_path: c.GetAll(
3295
"se.recompile.Mandos.Client")
3296
for c in tcp_server.clients.values()},
2347
3297
signature="oa{sv}")
2348
3298
2349
3299
@dbus.service.method(_interface, in_signature="o")
2350
3300
def RemoveClient(self, object_path):
2351
3301
"D-Bus method"
2352
for c in tcp_server.clients.itervalues():
3302
for c in tcp_server.clients.values():
2353
3303
if c.dbus_object_path == object_path:
2354
3304
del tcp_server.clients[c.name]
2355
3305
c.remove_from_connection()
2356
# Don't signal anything except ClientRemoved
3306
# Don't signal the disabling
2357
3307
c.disable(quiet=True)
2358
# Emit D-Bus signal
2359
self.ClientRemoved(object_path, c.name)
3308
# Emit D-Bus signal for removal
3309
self.client_removed_signal(c)
2360
3310
return
2361
3311
raise KeyError(object_path)
2362
3312
2363
3313
del _interface
2364
2365
class MandosDBusServiceTransitional(MandosDBusService):
2366
__metaclass__ = AlternateDBusNamesMetaclass
2367
mandos_dbus_service = MandosDBusServiceTransitional()
2368
3314
3315
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3316
out_signature="a{oa{sa{sv}}}")
3317
def GetManagedObjects(self):
3318
"""D-Bus method"""
3319
return dbus.Dictionary(
3320
{client.dbus_object_path:
3321
dbus.Dictionary(
3322
{interface: client.GetAll(interface)
3323
for interface in
3324
client._get_all_interface_names()})
3325
for client in tcp_server.clients.values()})
3326
3327
def client_added_signal(self, client):
3328
"""Send the new standard signal and the old signal"""
3329
if use_dbus:
3330
# New standard signal
3331
self.InterfacesAdded(
3332
client.dbus_object_path,
3333
dbus.Dictionary(
3334
{interface: client.GetAll(interface)
3335
for interface in
3336
client._get_all_interface_names()}))
3337
# Old signal
3338
self.ClientAdded(client.dbus_object_path)
3339
3340
def client_removed_signal(self, client):
3341
"""Send the new standard signal and the old signal"""
3342
if use_dbus:
3343
# New standard signal
3344
self.InterfacesRemoved(
3345
client.dbus_object_path,
3346
client._get_all_interface_names())
3347
# Old signal
3348
self.ClientRemoved(client.dbus_object_path,
3349
client.name)
3350
3351
mandos_dbus_service = MandosDBusService()
3352
3353
# Save modules to variables to exempt the modules from being
3354
# unloaded before the function registered with atexit() is run.
3355
mp = multiprocessing
3356
wn = wnull
3357
2369
3358
def cleanup():
2370
3359
"Cleanup function; run on exit"
2371
service.cleanup()
2372
2373
multiprocessing.active_children()
3360
if zeroconf:
3361
service.cleanup()
3362
3363
mp.active_children()
3364
wn.close()
2374
3365
if not (tcp_server.clients or client_settings):
2375
3366
return
2376
3367
2377
3368
# Store client before exiting. Secrets are encrypted with key
2378
3369
# based on what config file has. If config file is
2379
3370
# removed/edited, old secret will thus be unrecovable.
2380
3371
clients = {}
2381
3372
with PGPEngine() as pgp:
2382
for client in tcp_server.clients.itervalues():
3373
for client in tcp_server.clients.values():
2383
3374
key = client_settings[client.name]["secret"]
2384
3375
client.encrypted_secret = pgp.encrypt(client.secret,
2385
3376
key)
2386
3377
client_dict = {}
2387
3378
2388
3379
# A list of attributes that can not be pickled
2389
3380
# + secret.
2390
exclude = set(("bus", "changedstate", "secret",
2391
"checker"))
2392
for name, typ in (inspect.getmembers
2393
(dbus.service.Object)):
3381
exclude = {"bus", "changedstate", "secret",
3382
"checker", "server_settings"}
3383
for name, typ in inspect.getmembers(dbus.service
3384
.Object):
2394
3385
exclude.add(name)
2395
3386
2396
3387
client_dict["encrypted_secret"] = (client
2397
3388
.encrypted_secret)
2398
3389
for attr in client.client_structure:
2399
3390
if attr not in exclude:
2400
3391
client_dict[attr] = getattr(client, attr)
2401
3392
2402
3393
clients[client.name] = client_dict
2403
3394
del client_settings[client.name]["secret"]
2404
3395
2405
3396
try:
2406
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2407
prefix="clients-",
2408
dir=os.path.dirname
2409
(stored_state_path))
2410
with os.fdopen(tempfd, "wb") as stored_state:
2411
pickle.dump((clients, client_settings), stored_state)
3397
with tempfile.NamedTemporaryFile(
3398
mode='wb',
3399
suffix=".pickle",
3400
prefix='clients-',
3401
dir=os.path.dirname(stored_state_path),
3402
delete=False) as stored_state:
3403
pickle.dump((clients, client_settings), stored_state,
3404
protocol=2)
3405
tempname = stored_state.name
2412
3406
os.rename(tempname, stored_state_path)
2413
3407
except (IOError, OSError) as e:
2414
logger.warning("Could not save persistent state: {0}"
2415
.format(e))
2416
3408
if not debug:
2417
3409
try:
2418
3410
os.remove(tempname)
2419
3411
except NameError:
2420
3412
pass
2421
if e.errno not in set((errno.ENOENT, errno.EACCES,
2422
errno.EEXIST)):
2423
raise e
2424
3413
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3414
logger.warning("Could not save persistent state: {}"
3415
.format(os.strerror(e.errno)))
3416
else:
3417
logger.warning("Could not save persistent state:",
3418
exc_info=e)
3419
raise
3420
2425
3421
# Delete all clients, and settings from config
2426
3422
while tcp_server.clients:
2427
3423
name, client = tcp_server.clients.popitem()
2428
3424
if use_dbus:
2429
3425
client.remove_from_connection()
2430
# Don't signal anything except ClientRemoved
3426
# Don't signal the disabling
2431
3427
client.disable(quiet=True)
3428
# Emit D-Bus signal for removal
2432
3429
if use_dbus:
2433
# Emit D-Bus signal
2434
mandos_dbus_service.ClientRemoved(client
2435
.dbus_object_path,
2436
client.name)
3430
mandos_dbus_service.client_removed_signal(client)
2437
3431
client_settings.clear()
2438
3432
2439
3433
atexit.register(cleanup)
2440
2441
for client in tcp_server.clients.itervalues():
3434
3435
for client in tcp_server.clients.values():
2442
3436
if use_dbus:
2443
# Emit D-Bus signal
2444
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3437
# Emit D-Bus signal for adding
3438
mandos_dbus_service.client_added_signal(client)
2445
3439
# Need to initiate checking of clients
2446
3440
if client.enabled:
2447
3441
client.init_checker()
2448
3442
2449
3443
tcp_server.enable()
2450
3444
tcp_server.server_activate()
2451
3445
2452
3446
# Find out what port we got
2453
service.port = tcp_server.socket.getsockname()[1]
3447
if zeroconf:
3448
service.port = tcp_server.socket.getsockname()[1]
2454
3449
if use_ipv6:
2455
3450
logger.info("Now listening on address %r, port %d,"
2456
" flowinfo %d, scope_id %d"
2457
% tcp_server.socket.getsockname())
3451
" flowinfo %d, scope_id %d",
3452
*tcp_server.socket.getsockname())
2458
3453
else: # IPv4
2459
logger.info("Now listening on address %r, port %d"
2460
% tcp_server.socket.getsockname())
2461
2462
#service.interface = tcp_server.socket.getsockname()[3]
2463
3454
logger.info("Now listening on address %r, port %d",
3455
*tcp_server.socket.getsockname())
3456
3457
# service.interface = tcp_server.socket.getsockname()[3]
3458
2464
3459
try:
2465
# From the Avahi example code
2466
try:
2467
service.activate()
2468
except dbus.exceptions.DBusException as error:
2469
logger.critical("DBusException: %s", error)
2470
cleanup()
2471
sys.exit(1)
2472
# End of Avahi example code
2473
2474
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2475
lambda *args, **kwargs:
2476
(tcp_server.handle_request
2477
(*args[2:], **kwargs) or True))
2478
3460
if zeroconf:
3461
# From the Avahi example code
3462
try:
3463
service.activate()
3464
except dbus.exceptions.DBusException as error:
3465
logger.critical("D-Bus Exception", exc_info=error)
3466
cleanup()
3467
sys.exit(1)
3468
# End of Avahi example code
3469
3470
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3471
lambda *args, **kwargs:
3472
(tcp_server.handle_request
3473
(*args[2:], **kwargs) or True))
3474
2479
3475
logger.debug("Starting main loop")
2480
3476
main_loop.run()
2481
3477
except AvahiError as error:
2482
logger.critical("AvahiError: %s", error)
3478
logger.critical("Avahi Error", exc_info=error)
2483
3479
cleanup()
2484
3480
sys.exit(1)
2485
3481
except KeyboardInterrupt:
2490
3486
# Must run before the D-Bus bus name gets deregistered
2491
3487
cleanup()
2492
3488
3489
2493
3490
if __name__ == '__main__':
2494
3491
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0