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- Committer: Teddy Hogeborn
- Date: 2016-08-25 17:37:05 UTC
- Revision ID: teddy@recompile.se-20160825173705-q2v6lban8ph9uw75
PEP8 compliance: mandos
* mandos: Add PEP8 compliance (as per the "pycodestyle" tool).
* mandos: Add PEP8 compliance (as per the "pycodestyle" tool).
- files added:
- bugs.xml
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
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2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
5
#
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
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# 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
16
#
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
34
from __future__ import (division, absolute_import, print_function,
35
35
unicode_literals)
36
36
37
import SocketServer as socketserver
37
try:
38
from future_builtins import *
39
except ImportError:
40
pass
41
42
try:
43
import SocketServer as socketserver
44
except ImportError:
45
import socketserver
38
46
import socket
39
47
import argparse
40
48
import datetime
41
49
import errno
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
50
try:
51
import ConfigParser as configparser
52
except ImportError:
53
import configparser
49
54
import sys
50
55
import re
51
56
import os
60
65
import struct
61
66
import fcntl
62
67
import functools
63
import cPickle as pickle
68
try:
69
import cPickle as pickle
70
except ImportError:
71
import pickle
64
72
import multiprocessing
65
73
import types
74
import binascii
75
import tempfile
76
import itertools
77
import collections
78
import codecs
66
79
67
80
import dbus
68
81
import dbus.service
69
import gobject
70
import avahi
82
from gi.repository import GLib
71
83
from dbus.mainloop.glib import DBusGMainLoop
72
84
import ctypes
73
85
import ctypes.util
74
86
import xml.dom.minidom
75
87
import inspect
76
88
89
# Try to find the value of SO_BINDTODEVICE:
77
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:
78
93
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
79
94
except AttributeError:
80
95
try:
96
# This is where SO_BINDTODEVICE was up to and including Python
97
# 2.6, and also 3.2:
81
98
from IN import SO_BINDTODEVICE
82
99
except ImportError:
83
SO_BINDTODEVICE = None
84
85
86
version = "1.4.0"
87
88
#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
95
' %(message)s'))
96
logger.addHandler(syslogger)
97
98
console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
100
' %(levelname)s:'
101
' %(message)s'))
102
logger.addHandler(console)
100
# In Python 2.7 it seems to have been removed entirely.
101
# Try running the C preprocessor:
102
try:
103
cc = subprocess.Popen(["cc", "--language=c", "-E",
104
"/dev/stdin"],
105
stdin=subprocess.PIPE,
106
stdout=subprocess.PIPE)
107
stdout = cc.communicate(
108
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
109
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
110
except (OSError, ValueError, IndexError):
111
# No value found
112
SO_BINDTODEVICE = None
113
114
if sys.version_info.major == 2:
115
str = unicode
116
117
version = "1.7.10"
118
stored_state_file = "clients.pickle"
119
120
logger = logging.getLogger()
121
syslogger = None
122
123
try:
124
if_nametoindex = ctypes.cdll.LoadLibrary(
125
ctypes.util.find_library("c")).if_nametoindex
126
except (OSError, AttributeError):
127
128
def if_nametoindex(interface):
129
"Get an interface index the hard way, i.e. using fcntl()"
130
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
131
with contextlib.closing(socket.socket()) as s:
132
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
133
struct.pack(b"16s16x", interface))
134
interface_index = struct.unpack("I", ifreq[16:20])[0]
135
return interface_index
136
137
138
def copy_function(func):
139
"""Make a copy of a function"""
140
if sys.version_info.major == 2:
141
return types.FunctionType(func.func_code,
142
func.func_globals,
143
func.func_name,
144
func.func_defaults,
145
func.func_closure)
146
else:
147
return types.FunctionType(func.__code__,
148
func.__globals__,
149
func.__name__,
150
func.__defaults__,
151
func.__closure__)
152
153
154
def initlogger(debug, level=logging.WARNING):
155
"""init logger and add loglevel"""
156
157
global syslogger
158
syslogger = (logging.handlers.SysLogHandler(
159
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
160
address="/dev/log"))
161
syslogger.setFormatter(logging.Formatter
162
('Mandos [%(process)d]: %(levelname)s:'
163
' %(message)s'))
164
logger.addHandler(syslogger)
165
166
if debug:
167
console = logging.StreamHandler()
168
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
169
' [%(process)d]:'
170
' %(levelname)s:'
171
' %(message)s'))
172
logger.addHandler(console)
173
logger.setLevel(level)
174
175
176
class PGPError(Exception):
177
"""Exception if encryption/decryption fails"""
178
pass
179
180
181
class PGPEngine(object):
182
"""A simple class for OpenPGP symmetric encryption & decryption"""
183
184
def __init__(self):
185
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
186
self.gpg = "gpg"
187
try:
188
output = subprocess.check_output(["gpgconf"])
189
for line in output.splitlines():
190
name, text, path = line.split(b":")
191
if name == "gpg":
192
self.gpg = path
193
break
194
except OSError as e:
195
if e.errno != errno.ENOENT:
196
raise
197
self.gnupgargs = ['--batch',
198
'--homedir', self.tempdir,
199
'--force-mdc',
200
'--quiet']
201
# Only GPG version 1 has the --no-use-agent option.
202
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
203
self.gnupgargs.append("--no-use-agent")
204
205
def __enter__(self):
206
return self
207
208
def __exit__(self, exc_type, exc_value, traceback):
209
self._cleanup()
210
return False
211
212
def __del__(self):
213
self._cleanup()
214
215
def _cleanup(self):
216
if self.tempdir is not None:
217
# Delete contents of tempdir
218
for root, dirs, files in os.walk(self.tempdir,
219
topdown=False):
220
for filename in files:
221
os.remove(os.path.join(root, filename))
222
for dirname in dirs:
223
os.rmdir(os.path.join(root, dirname))
224
# Remove tempdir
225
os.rmdir(self.tempdir)
226
self.tempdir = None
227
228
def password_encode(self, password):
229
# Passphrase can not be empty and can not contain newlines or
230
# NUL bytes. So we prefix it and hex encode it.
231
encoded = b"mandos" + binascii.hexlify(password)
232
if len(encoded) > 2048:
233
# GnuPG can't handle long passwords, so encode differently
234
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
235
.replace(b"\n", b"\\n")
236
.replace(b"\0", b"\\x00"))
237
return encoded
238
239
def encrypt(self, data, password):
240
passphrase = self.password_encode(password)
241
with tempfile.NamedTemporaryFile(
242
dir=self.tempdir) as passfile:
243
passfile.write(passphrase)
244
passfile.flush()
245
proc = subprocess.Popen([self.gpg, '--symmetric',
246
'--passphrase-file',
247
passfile.name]
248
+ self.gnupgargs,
249
stdin=subprocess.PIPE,
250
stdout=subprocess.PIPE,
251
stderr=subprocess.PIPE)
252
ciphertext, err = proc.communicate(input=data)
253
if proc.returncode != 0:
254
raise PGPError(err)
255
return ciphertext
256
257
def decrypt(self, data, password):
258
passphrase = self.password_encode(password)
259
with tempfile.NamedTemporaryFile(
260
dir=self.tempdir) as passfile:
261
passfile.write(passphrase)
262
passfile.flush()
263
proc = subprocess.Popen([self.gpg, '--decrypt',
264
'--passphrase-file',
265
passfile.name]
266
+ self.gnupgargs,
267
stdin=subprocess.PIPE,
268
stdout=subprocess.PIPE,
269
stderr=subprocess.PIPE)
270
decrypted_plaintext, err = proc.communicate(input=data)
271
if proc.returncode != 0:
272
raise PGPError(err)
273
return decrypted_plaintext
274
275
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
103
302
104
303
class AvahiError(Exception):
105
304
def __init__(self, value, *args, **kwargs):
106
305
self.value = value
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
306
return super(AvahiError, self).__init__(value, *args,
307
**kwargs)
308
110
309
111
310
class AvahiServiceError(AvahiError):
112
311
pass
113
312
313
114
314
class AvahiGroupError(AvahiError):
115
315
pass
116
316
117
317
118
318
class AvahiService(object):
119
319
"""An Avahi (Zeroconf) service.
120
320
121
321
Attributes:
122
322
interface: integer; avahi.IF_UNSPEC or an interface index.
123
323
Used to optionally bind to the specified interface.
124
324
name: string; Example: 'Mandos'
125
325
type: string; Example: '_mandos._tcp'.
126
See <http://www.dns-sd.org/ServiceTypes.html>
326
See <https://www.iana.org/assignments/service-names-port-numbers>
127
327
port: integer; what port to announce
128
328
TXT: list of strings; TXT record for the service
129
329
domain: string; Domain to publish on, default to .local if empty.
135
335
server: D-Bus Server
136
336
bus: dbus.SystemBus()
137
337
"""
138
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
139
servicetype = None, port = None, TXT = None,
140
domain = "", host = "", max_renames = 32768,
141
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):
142
350
self.interface = interface
143
351
self.name = name
144
352
self.type = servicetype
153
361
self.server = None
154
362
self.bus = bus
155
363
self.entry_group_state_changed_match = None
156
def rename(self):
364
365
def rename(self, remove=True):
157
366
"""Derived from the Avahi example code"""
158
367
if self.rename_count >= self.max_renames:
159
368
logger.critical("No suitable Zeroconf service name found"
160
369
" after %i retries, exiting.",
161
370
self.rename_count)
162
371
raise AvahiServiceError("Too many renames")
163
self.name = unicode(self.server
164
.GetAlternativeServiceName(self.name))
372
self.name = str(
373
self.server.GetAlternativeServiceName(self.name))
374
self.rename_count += 1
165
375
logger.info("Changing Zeroconf service name to %r ...",
166
376
self.name)
167
syslogger.setFormatter(logging.Formatter
168
('Mandos (%s) [%%(process)d]:'
169
' %%(levelname)s: %%(message)s'
170
% self.name))
171
self.remove()
377
if remove:
378
self.remove()
172
379
try:
173
380
self.add()
174
381
except dbus.exceptions.DBusException as error:
175
logger.critical("DBusException: %s", error)
176
self.cleanup()
177
os._exit(1)
178
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
179
391
def remove(self):
180
392
"""Derived from the Avahi example code"""
181
393
if self.entry_group_state_changed_match is not None:
183
395
self.entry_group_state_changed_match = None
184
396
if self.group is not None:
185
397
self.group.Reset()
398
186
399
def add(self):
187
400
"""Derived from the Avahi example code"""
188
401
self.remove()
193
406
avahi.DBUS_INTERFACE_ENTRY_GROUP)
194
407
self.entry_group_state_changed_match = (
195
408
self.group.connect_to_signal(
196
'StateChanged', self .entry_group_state_changed))
409
'StateChanged', self.entry_group_state_changed))
197
410
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
198
411
self.name, self.type)
199
412
self.group.AddService(
205
418
dbus.UInt16(self.port),
206
419
avahi.string_array_to_txt_array(self.TXT))
207
420
self.group.Commit()
421
208
422
def entry_group_state_changed(self, state, error):
209
423
"""Derived from the Avahi example code"""
210
424
logger.debug("Avahi entry group state change: %i", state)
211
425
212
426
if state == avahi.ENTRY_GROUP_ESTABLISHED:
213
427
logger.debug("Zeroconf service established.")
214
428
elif state == avahi.ENTRY_GROUP_COLLISION:
216
430
self.rename()
217
431
elif state == avahi.ENTRY_GROUP_FAILURE:
218
432
logger.critical("Avahi: Error in group state changed %s",
219
unicode(error))
220
raise AvahiGroupError("State changed: %s"
221
% unicode(error))
433
str(error))
434
raise AvahiGroupError("State changed: {!s}".format(error))
435
222
436
def cleanup(self):
223
437
"""Derived from the Avahi example code"""
224
438
if self.group is not None:
225
439
try:
226
440
self.group.Free()
227
441
except (dbus.exceptions.UnknownMethodException,
228
dbus.exceptions.DBusException) as e:
442
dbus.exceptions.DBusException):
229
443
pass
230
444
self.group = None
231
445
self.remove()
446
232
447
def server_state_changed(self, state, error=None):
233
448
"""Derived from the Avahi example code"""
234
449
logger.debug("Avahi server state change: %i", state)
235
bad_states = { avahi.SERVER_INVALID:
236
"Zeroconf server invalid",
237
avahi.SERVER_REGISTERING: None,
238
avahi.SERVER_COLLISION:
239
"Zeroconf server name collision",
240
avahi.SERVER_FAILURE:
241
"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
}
242
456
if state in bad_states:
243
457
if bad_states[state] is not None:
244
458
if error is None:
247
461
logger.error(bad_states[state] + ": %r", error)
248
462
self.cleanup()
249
463
elif state == avahi.SERVER_RUNNING:
250
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)
251
476
else:
252
477
if error is None:
253
478
logger.debug("Unknown state: %r", state)
254
479
else:
255
480
logger.debug("Unknown state: %r: %r", state, error)
481
256
482
def activate(self):
257
483
"""Derived from the Avahi example code"""
258
484
if self.server is None:
262
488
follow_name_owner_changes=True),
263
489
avahi.DBUS_INTERFACE_SERVER)
264
490
self.server.connect_to_signal("StateChanged",
265
self.server_state_changed)
491
self.server_state_changed)
266
492
self.server_state_changed(self.server.GetState())
267
493
268
494
269
def _timedelta_to_milliseconds(td):
270
"Convert a datetime.timedelta() to milliseconds"
271
return ((td.days * 24 * 60 * 60 * 1000)
272
+ (td.seconds * 1000)
273
+ (td.microseconds // 1000))
274
495
class AvahiServiceToSyslog(AvahiService):
496
def rename(self, *args, **kwargs):
497
"""Add the new name to the syslog messages"""
498
ret = AvahiService.rename(self, *args, **kwargs)
499
syslogger.setFormatter(logging.Formatter(
500
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
501
.format(self.name)))
502
return ret
503
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.cdll.LoadLibrary(
511
ctypes.util.find_library("gnutls"))
512
_need_version = b"3.3.0"
513
514
def __init__(self):
515
# Need to use class name "GnuTLS" here, since this method is
516
# called before the assignment to the "gnutls" global variable
517
# happens.
518
if GnuTLS.check_version(self._need_version) is None:
519
raise GnuTLS.Error("Needs GnuTLS {} or later"
520
.format(self._need_version))
521
522
# Unless otherwise indicated, the constants and types below are
523
# all from the gnutls/gnutls.h C header file.
524
525
# Constants
526
E_SUCCESS = 0
527
E_INTERRUPTED = -52
528
E_AGAIN = -28
529
CRT_OPENPGP = 2
530
CLIENT = 2
531
SHUT_RDWR = 0
532
CRD_CERTIFICATE = 1
533
E_NO_CERTIFICATE_FOUND = -49
534
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
535
536
# Types
537
class session_int(ctypes.Structure):
538
_fields_ = []
539
session_t = ctypes.POINTER(session_int)
540
541
class certificate_credentials_st(ctypes.Structure):
542
_fields_ = []
543
certificate_credentials_t = ctypes.POINTER(
544
certificate_credentials_st)
545
certificate_type_t = ctypes.c_int
546
547
class datum_t(ctypes.Structure):
548
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
549
('size', ctypes.c_uint)]
550
551
class openpgp_crt_int(ctypes.Structure):
552
_fields_ = []
553
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
554
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
555
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
556
credentials_type_t = ctypes.c_int
557
transport_ptr_t = ctypes.c_void_p
558
close_request_t = ctypes.c_int
559
560
# Exceptions
561
class Error(Exception):
562
# We need to use the class name "GnuTLS" here, since this
563
# exception might be raised from within GnuTLS.__init__,
564
# which is called before the assignment to the "gnutls"
565
# global variable has happened.
566
def __init__(self, message=None, code=None, args=()):
567
# Default usage is by a message string, but if a return
568
# code is passed, convert it to a string with
569
# gnutls.strerror()
570
self.code = code
571
if message is None and code is not None:
572
message = GnuTLS.strerror(code)
573
return super(GnuTLS.Error, self).__init__(
574
message, *args)
575
576
class CertificateSecurityError(Error):
577
pass
578
579
# Classes
580
class Credentials(object):
581
def __init__(self):
582
self._c_object = gnutls.certificate_credentials_t()
583
gnutls.certificate_allocate_credentials(
584
ctypes.byref(self._c_object))
585
self.type = gnutls.CRD_CERTIFICATE
586
587
def __del__(self):
588
gnutls.certificate_free_credentials(self._c_object)
589
590
class ClientSession(object):
591
def __init__(self, socket, credentials=None):
592
self._c_object = gnutls.session_t()
593
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
594
gnutls.set_default_priority(self._c_object)
595
gnutls.transport_set_ptr(self._c_object, socket.fileno())
596
gnutls.handshake_set_private_extensions(self._c_object,
597
True)
598
self.socket = socket
599
if credentials is None:
600
credentials = gnutls.Credentials()
601
gnutls.credentials_set(self._c_object, credentials.type,
602
ctypes.cast(credentials._c_object,
603
ctypes.c_void_p))
604
self.credentials = credentials
605
606
def __del__(self):
607
gnutls.deinit(self._c_object)
608
609
def handshake(self):
610
return gnutls.handshake(self._c_object)
611
612
def send(self, data):
613
data = bytes(data)
614
data_len = len(data)
615
while data_len > 0:
616
data_len -= gnutls.record_send(self._c_object,
617
data[-data_len:],
618
data_len)
619
620
def bye(self):
621
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
622
623
# Error handling functions
624
def _error_code(result):
625
"""A function to raise exceptions on errors, suitable
626
for the 'restype' attribute on ctypes functions"""
627
if result >= 0:
628
return result
629
if result == gnutls.E_NO_CERTIFICATE_FOUND:
630
raise gnutls.CertificateSecurityError(code=result)
631
raise gnutls.Error(code=result)
632
633
def _retry_on_error(result, func, arguments):
634
"""A function to retry on some errors, suitable
635
for the 'errcheck' attribute on ctypes functions"""
636
while result < 0:
637
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
638
return _error_code(result)
639
result = func(*arguments)
640
return result
641
642
# Unless otherwise indicated, the function declarations below are
643
# all from the gnutls/gnutls.h C header file.
644
645
# Functions
646
priority_set_direct = _library.gnutls_priority_set_direct
647
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
648
ctypes.POINTER(ctypes.c_char_p)]
649
priority_set_direct.restype = _error_code
650
651
init = _library.gnutls_init
652
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
653
init.restype = _error_code
654
655
set_default_priority = _library.gnutls_set_default_priority
656
set_default_priority.argtypes = [session_t]
657
set_default_priority.restype = _error_code
658
659
record_send = _library.gnutls_record_send
660
record_send.argtypes = [session_t, ctypes.c_void_p,
661
ctypes.c_size_t]
662
record_send.restype = ctypes.c_ssize_t
663
record_send.errcheck = _retry_on_error
664
665
certificate_allocate_credentials = (
666
_library.gnutls_certificate_allocate_credentials)
667
certificate_allocate_credentials.argtypes = [
668
ctypes.POINTER(certificate_credentials_t)]
669
certificate_allocate_credentials.restype = _error_code
670
671
certificate_free_credentials = (
672
_library.gnutls_certificate_free_credentials)
673
certificate_free_credentials.argtypes = [
674
certificate_credentials_t]
675
certificate_free_credentials.restype = None
676
677
handshake_set_private_extensions = (
678
_library.gnutls_handshake_set_private_extensions)
679
handshake_set_private_extensions.argtypes = [session_t,
680
ctypes.c_int]
681
handshake_set_private_extensions.restype = None
682
683
credentials_set = _library.gnutls_credentials_set
684
credentials_set.argtypes = [session_t, credentials_type_t,
685
ctypes.c_void_p]
686
credentials_set.restype = _error_code
687
688
strerror = _library.gnutls_strerror
689
strerror.argtypes = [ctypes.c_int]
690
strerror.restype = ctypes.c_char_p
691
692
certificate_type_get = _library.gnutls_certificate_type_get
693
certificate_type_get.argtypes = [session_t]
694
certificate_type_get.restype = _error_code
695
696
certificate_get_peers = _library.gnutls_certificate_get_peers
697
certificate_get_peers.argtypes = [session_t,
698
ctypes.POINTER(ctypes.c_uint)]
699
certificate_get_peers.restype = ctypes.POINTER(datum_t)
700
701
global_set_log_level = _library.gnutls_global_set_log_level
702
global_set_log_level.argtypes = [ctypes.c_int]
703
global_set_log_level.restype = None
704
705
global_set_log_function = _library.gnutls_global_set_log_function
706
global_set_log_function.argtypes = [log_func]
707
global_set_log_function.restype = None
708
709
deinit = _library.gnutls_deinit
710
deinit.argtypes = [session_t]
711
deinit.restype = None
712
713
handshake = _library.gnutls_handshake
714
handshake.argtypes = [session_t]
715
handshake.restype = _error_code
716
handshake.errcheck = _retry_on_error
717
718
transport_set_ptr = _library.gnutls_transport_set_ptr
719
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
720
transport_set_ptr.restype = None
721
722
bye = _library.gnutls_bye
723
bye.argtypes = [session_t, close_request_t]
724
bye.restype = _error_code
725
bye.errcheck = _retry_on_error
726
727
check_version = _library.gnutls_check_version
728
check_version.argtypes = [ctypes.c_char_p]
729
check_version.restype = ctypes.c_char_p
730
731
# All the function declarations below are from gnutls/openpgp.h
732
733
openpgp_crt_init = _library.gnutls_openpgp_crt_init
734
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
735
openpgp_crt_init.restype = _error_code
736
737
openpgp_crt_import = _library.gnutls_openpgp_crt_import
738
openpgp_crt_import.argtypes = [openpgp_crt_t,
739
ctypes.POINTER(datum_t),
740
openpgp_crt_fmt_t]
741
openpgp_crt_import.restype = _error_code
742
743
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
744
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
745
ctypes.POINTER(ctypes.c_uint)]
746
openpgp_crt_verify_self.restype = _error_code
747
748
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
749
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
750
openpgp_crt_deinit.restype = None
751
752
openpgp_crt_get_fingerprint = (
753
_library.gnutls_openpgp_crt_get_fingerprint)
754
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
755
ctypes.c_void_p,
756
ctypes.POINTER(
757
ctypes.c_size_t)]
758
openpgp_crt_get_fingerprint.restype = _error_code
759
760
# Remove non-public functions
761
del _error_code, _retry_on_error
762
# Create the global "gnutls" object, simulating a module
763
gnutls = GnuTLS()
764
765
766
def call_pipe(connection, # : multiprocessing.Connection
767
func, *args, **kwargs):
768
"""This function is meant to be called by multiprocessing.Process
769
770
This function runs func(*args, **kwargs), and writes the resulting
771
return value on the provided multiprocessing.Connection.
772
"""
773
connection.send(func(*args, **kwargs))
774
connection.close()
775
776
275
777
class Client(object):
276
778
"""A representation of a client host served by this server.
277
779
278
780
Attributes:
279
_approved: bool(); 'None' if not yet approved/disapproved
781
approved: bool(); 'None' if not yet approved/disapproved
280
782
approval_delay: datetime.timedelta(); Time to wait for approval
281
783
approval_duration: datetime.timedelta(); Duration of one approval
282
784
checker: subprocess.Popen(); a running checker process used
283
785
to see if the client lives.
284
786
'None' if no process is running.
285
checker_callback_tag: a gobject event source tag, or None
787
checker_callback_tag: a GLib event source tag, or None
286
788
checker_command: string; External command which is run to check
287
789
if client lives. %() expansions are done at
288
790
runtime with vars(self) as dict, so that for
289
791
instance %(name)s can be used in the command.
290
checker_initiator_tag: a gobject event source tag, or None
792
checker_initiator_tag: a GLib event source tag, or None
291
793
created: datetime.datetime(); (UTC) object creation
794
client_structure: Object describing what attributes a client has
795
and is used for storing the client at exit
292
796
current_checker_command: string; current running checker_command
293
disable_hook: If set, called by disable() as disable_hook(self)
294
disable_initiator_tag: a gobject event source tag, or None
797
disable_initiator_tag: a GLib event source tag, or None
295
798
enabled: bool()
296
799
fingerprint: string (40 or 32 hexadecimal digits); used to
297
800
uniquely identify the client
299
802
interval: datetime.timedelta(); How often to start a new checker
300
803
last_approval_request: datetime.datetime(); (UTC) or None
301
804
last_checked_ok: datetime.datetime(); (UTC) or None
302
last_enabled: datetime.datetime(); (UTC)
805
last_checker_status: integer between 0 and 255 reflecting exit
806
status of last checker. -1 reflects crashed
807
checker, -2 means no checker completed yet.
808
last_checker_signal: The signal which killed the last checker, if
809
last_checker_status is -1
810
last_enabled: datetime.datetime(); (UTC) or None
303
811
name: string; from the config file, used in log messages and
304
812
D-Bus identifiers
305
813
secret: bytestring; sent verbatim (over TLS) to client
306
814
timeout: datetime.timedelta(); How long from last_checked_ok
307
815
until this client is disabled
308
extended_timeout: extra long timeout when password has been sent
816
extended_timeout: extra long timeout when secret has been sent
309
817
runtime_expansions: Allowed attributes for runtime expansion.
310
818
expires: datetime.datetime(); time (UTC) when a client will be
311
819
disabled, or None
820
server_settings: The server_settings dict from main()
312
821
"""
313
822
314
823
runtime_expansions = ("approval_delay", "approval_duration",
315
"created", "enabled", "fingerprint",
316
"host", "interval", "last_checked_ok",
824
"created", "enabled", "expires",
825
"fingerprint", "host", "interval",
826
"last_approval_request", "last_checked_ok",
317
827
"last_enabled", "name", "timeout")
318
319
def timeout_milliseconds(self):
320
"Return the 'timeout' attribute in milliseconds"
321
return _timedelta_to_milliseconds(self.timeout)
322
323
def extended_timeout_milliseconds(self):
324
"Return the 'extended_timeout' attribute in milliseconds"
325
return _timedelta_to_milliseconds(self.extended_timeout)
326
327
def interval_milliseconds(self):
328
"Return the 'interval' attribute in milliseconds"
329
return _timedelta_to_milliseconds(self.interval)
330
331
def approval_delay_milliseconds(self):
332
return _timedelta_to_milliseconds(self.approval_delay)
333
334
def __init__(self, name = None, disable_hook=None, config=None):
335
"""Note: the 'checker' key in 'config' sets the
336
'checker_command' attribute and *not* the 'checker'
337
attribute."""
828
client_defaults = {
829
"timeout": "PT5M",
830
"extended_timeout": "PT15M",
831
"interval": "PT2M",
832
"checker": "fping -q -- %%(host)s",
833
"host": "",
834
"approval_delay": "PT0S",
835
"approval_duration": "PT1S",
836
"approved_by_default": "True",
837
"enabled": "True",
838
}
839
840
@staticmethod
841
def config_parser(config):
842
"""Construct a new dict of client settings of this form:
843
{ client_name: {setting_name: value, ...}, ...}
844
with exceptions for any special settings as defined above.
845
NOTE: Must be a pure function. Must return the same result
846
value given the same arguments.
847
"""
848
settings = {}
849
for client_name in config.sections():
850
section = dict(config.items(client_name))
851
client = settings[client_name] = {}
852
853
client["host"] = section["host"]
854
# Reformat values from string types to Python types
855
client["approved_by_default"] = config.getboolean(
856
client_name, "approved_by_default")
857
client["enabled"] = config.getboolean(client_name,
858
"enabled")
859
860
# Uppercase and remove spaces from fingerprint for later
861
# comparison purposes with return value from the
862
# fingerprint() function
863
client["fingerprint"] = (section["fingerprint"].upper()
864
.replace(" ", ""))
865
if "secret" in section:
866
client["secret"] = codecs.decode(section["secret"]
867
.encode("utf-8"),
868
"base64")
869
elif "secfile" in section:
870
with open(os.path.expanduser(os.path.expandvars
871
(section["secfile"])),
872
"rb") as secfile:
873
client["secret"] = secfile.read()
874
else:
875
raise TypeError("No secret or secfile for section {}"
876
.format(section))
877
client["timeout"] = string_to_delta(section["timeout"])
878
client["extended_timeout"] = string_to_delta(
879
section["extended_timeout"])
880
client["interval"] = string_to_delta(section["interval"])
881
client["approval_delay"] = string_to_delta(
882
section["approval_delay"])
883
client["approval_duration"] = string_to_delta(
884
section["approval_duration"])
885
client["checker_command"] = section["checker"]
886
client["last_approval_request"] = None
887
client["last_checked_ok"] = None
888
client["last_checker_status"] = -2
889
890
return settings
891
892
def __init__(self, settings, name=None, server_settings=None):
338
893
self.name = name
339
if config is None:
340
config = {}
894
if server_settings is None:
895
server_settings = {}
896
self.server_settings = server_settings
897
# adding all client settings
898
for setting, value in settings.items():
899
setattr(self, setting, value)
900
901
if self.enabled:
902
if not hasattr(self, "last_enabled"):
903
self.last_enabled = datetime.datetime.utcnow()
904
if not hasattr(self, "expires"):
905
self.expires = (datetime.datetime.utcnow()
906
+ self.timeout)
907
else:
908
self.last_enabled = None
909
self.expires = None
910
341
911
logger.debug("Creating client %r", self.name)
342
# Uppercase and remove spaces from fingerprint for later
343
# comparison purposes with return value from the fingerprint()
344
# function
345
self.fingerprint = (config["fingerprint"].upper()
346
.replace(" ", ""))
347
912
logger.debug(" Fingerprint: %s", self.fingerprint)
348
if "secret" in config:
349
self.secret = config["secret"].decode("base64")
350
elif "secfile" in config:
351
with open(os.path.expanduser(os.path.expandvars
352
(config["secfile"])),
353
"rb") as secfile:
354
self.secret = secfile.read()
355
else:
356
raise TypeError("No secret or secfile for client %s"
357
% self.name)
358
self.host = config.get("host", "")
359
self.created = datetime.datetime.utcnow()
360
self.enabled = False
361
self.last_approval_request = None
362
self.last_enabled = None
363
self.last_checked_ok = None
364
self.timeout = string_to_delta(config["timeout"])
365
self.extended_timeout = string_to_delta(config
366
["extended_timeout"])
367
self.interval = string_to_delta(config["interval"])
368
self.disable_hook = disable_hook
913
self.created = settings.get("created",
914
datetime.datetime.utcnow())
915
916
# attributes specific for this server instance
369
917
self.checker = None
370
918
self.checker_initiator_tag = None
371
919
self.disable_initiator_tag = None
372
self.expires = None
373
920
self.checker_callback_tag = None
374
self.checker_command = config["checker"]
375
921
self.current_checker_command = None
376
self.last_connect = None
377
self._approved = None
378
self.approved_by_default = config.get("approved_by_default",
379
True)
922
self.approved = None
380
923
self.approvals_pending = 0
381
self.approval_delay = string_to_delta(
382
config["approval_delay"])
383
self.approval_duration = string_to_delta(
384
config["approval_duration"])
385
self.changedstate = (multiprocessing_manager
386
.Condition(multiprocessing_manager
387
.Lock()))
388
924
self.changedstate = multiprocessing_manager.Condition(
925
multiprocessing_manager.Lock())
926
self.client_structure = [attr
927
for attr in self.__dict__.keys()
928
if not attr.startswith("_")]
929
self.client_structure.append("client_structure")
930
931
for name, t in inspect.getmembers(
932
type(self), lambda obj: isinstance(obj, property)):
933
if not name.startswith("_"):
934
self.client_structure.append(name)
935
936
# Send notice to process children that client state has changed
389
937
def send_changedstate(self):
390
self.changedstate.acquire()
391
self.changedstate.notify_all()
392
self.changedstate.release()
393
938
with self.changedstate:
939
self.changedstate.notify_all()
940
394
941
def enable(self):
395
942
"""Start this client's checker and timeout hooks"""
396
943
if getattr(self, "enabled", False):
397
944
# Already enabled
398
945
return
399
self.send_changedstate()
400
# Schedule a new checker to be started an 'interval' from now,
401
# and every interval from then on.
402
self.checker_initiator_tag = (gobject.timeout_add
403
(self.interval_milliseconds(),
404
self.start_checker))
405
# Schedule a disable() when 'timeout' has passed
406
946
self.expires = datetime.datetime.utcnow() + self.timeout
407
self.disable_initiator_tag = (gobject.timeout_add
408
(self.timeout_milliseconds(),
409
self.disable))
410
947
self.enabled = True
411
948
self.last_enabled = datetime.datetime.utcnow()
412
# Also start a new checker *right now*.
413
self.start_checker()
414
949
self.init_checker()
950
self.send_changedstate()
951
415
952
def disable(self, quiet=True):
416
953
"""Disable this client."""
417
954
if not getattr(self, "enabled", False):
418
955
return False
419
956
if not quiet:
420
self.send_changedstate()
421
if not quiet:
422
957
logger.info("Disabling client %s", self.name)
423
if getattr(self, "disable_initiator_tag", False):
424
gobject.source_remove(self.disable_initiator_tag)
958
if getattr(self, "disable_initiator_tag", None) is not None:
959
GLib.source_remove(self.disable_initiator_tag)
425
960
self.disable_initiator_tag = None
426
961
self.expires = None
427
if getattr(self, "checker_initiator_tag", False):
428
gobject.source_remove(self.checker_initiator_tag)
962
if getattr(self, "checker_initiator_tag", None) is not None:
963
GLib.source_remove(self.checker_initiator_tag)
429
964
self.checker_initiator_tag = None
430
965
self.stop_checker()
431
if self.disable_hook:
432
self.disable_hook(self)
433
966
self.enabled = False
434
# Do not run this again if called by a gobject.timeout_add
967
if not quiet:
968
self.send_changedstate()
969
# Do not run this again if called by a GLib.timeout_add
435
970
return False
436
971
437
972
def __del__(self):
438
self.disable_hook = None
439
973
self.disable()
440
441
def checker_callback(self, pid, condition, command):
974
975
def init_checker(self):
976
# Schedule a new checker to be started an 'interval' from now,
977
# and every interval from then on.
978
if self.checker_initiator_tag is not None:
979
GLib.source_remove(self.checker_initiator_tag)
980
self.checker_initiator_tag = GLib.timeout_add(
981
int(self.interval.total_seconds() * 1000),
982
self.start_checker)
983
# Schedule a disable() when 'timeout' has passed
984
if self.disable_initiator_tag is not None:
985
GLib.source_remove(self.disable_initiator_tag)
986
self.disable_initiator_tag = GLib.timeout_add(
987
int(self.timeout.total_seconds() * 1000), self.disable)
988
# Also start a new checker *right now*.
989
self.start_checker()
990
991
def checker_callback(self, source, condition, connection,
992
command):
442
993
"""The checker has completed, so take appropriate actions."""
443
994
self.checker_callback_tag = None
444
995
self.checker = None
445
if os.WIFEXITED(condition):
446
exitstatus = os.WEXITSTATUS(condition)
447
if exitstatus == 0:
996
# Read return code from connection (see call_pipe)
997
returncode = connection.recv()
998
connection.close()
999
1000
if returncode >= 0:
1001
self.last_checker_status = returncode
1002
self.last_checker_signal = None
1003
if self.last_checker_status == 0:
448
1004
logger.info("Checker for %(name)s succeeded",
449
1005
vars(self))
450
1006
self.checked_ok()
451
1007
else:
452
logger.info("Checker for %(name)s failed",
453
vars(self))
1008
logger.info("Checker for %(name)s failed", vars(self))
454
1009
else:
1010
self.last_checker_status = -1
1011
self.last_checker_signal = -returncode
455
1012
logger.warning("Checker for %(name)s crashed?",
456
1013
vars(self))
457
458
def checked_ok(self, timeout=None):
459
"""Bump up the timeout for this client.
460
461
This should only be called when the client has been seen,
462
alive and well.
463
"""
1014
return False
1015
1016
def checked_ok(self):
1017
"""Assert that the client has been seen, alive and well."""
1018
self.last_checked_ok = datetime.datetime.utcnow()
1019
self.last_checker_status = 0
1020
self.last_checker_signal = None
1021
self.bump_timeout()
1022
1023
def bump_timeout(self, timeout=None):
1024
"""Bump up the timeout for this client."""
464
1025
if timeout is None:
465
1026
timeout = self.timeout
466
self.last_checked_ok = datetime.datetime.utcnow()
467
gobject.source_remove(self.disable_initiator_tag)
468
self.disable_initiator_tag = (gobject.timeout_add
469
(_timedelta_to_milliseconds
470
(timeout), self.disable))
471
self.expires = datetime.datetime.utcnow() + timeout
472
1027
if self.disable_initiator_tag is not None:
1028
GLib.source_remove(self.disable_initiator_tag)
1029
self.disable_initiator_tag = None
1030
if getattr(self, "enabled", False):
1031
self.disable_initiator_tag = GLib.timeout_add(
1032
int(timeout.total_seconds() * 1000), self.disable)
1033
self.expires = datetime.datetime.utcnow() + timeout
1034
473
1035
def need_approval(self):
474
1036
self.last_approval_request = datetime.datetime.utcnow()
475
1037
476
1038
def start_checker(self):
477
1039
"""Start a new checker subprocess if one is not running.
478
1040
479
1041
If a checker already exists, leave it running and do
480
1042
nothing."""
481
1043
# The reason for not killing a running checker is that if we
482
# did that, then if a checker (for some reason) started
483
# running slowly and taking more than 'interval' time, the
484
# client would inevitably timeout, since no checker would get
485
# a chance to run to completion. If we instead leave running
1044
# did that, and if a checker (for some reason) started running
1045
# slowly and taking more than 'interval' time, then the client
1046
# would inevitably timeout, since no checker would get a
1047
# chance to run to completion. If we instead leave running
486
1048
# checkers alone, the checker would have to take more time
487
1049
# than 'timeout' for the client to be disabled, which is as it
488
1050
# should be.
489
490
# If a checker exists, make sure it is not a zombie
491
try:
492
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
493
except (AttributeError, OSError) as error:
494
if (isinstance(error, OSError)
495
and error.errno != errno.ECHILD):
496
raise error
497
else:
498
if pid:
499
logger.warning("Checker was a zombie")
500
gobject.source_remove(self.checker_callback_tag)
501
self.checker_callback(pid, status,
502
self.current_checker_command)
1051
1052
if self.checker is not None and not self.checker.is_alive():
1053
logger.warning("Checker was not alive; joining")
1054
self.checker.join()
1055
self.checker = None
503
1056
# Start a new checker if needed
504
1057
if self.checker is None:
1058
# Escape attributes for the shell
1059
escaped_attrs = {
1060
attr: re.escape(str(getattr(self, attr)))
1061
for attr in self.runtime_expansions}
505
1062
try:
506
# In case checker_command has exactly one % operator
507
command = self.checker_command % self.host
508
except TypeError:
509
# Escape attributes for the shell
510
escaped_attrs = dict(
511
(attr,
512
re.escape(unicode(str(getattr(self, attr, "")),
513
errors=
514
'replace')))
515
for attr in
516
self.runtime_expansions)
517
518
try:
519
command = self.checker_command % escaped_attrs
520
except TypeError as error:
521
logger.error('Could not format string "%s":'
522
' %s', self.checker_command, error)
523
return True # Try again later
1063
command = self.checker_command % escaped_attrs
1064
except TypeError as error:
1065
logger.error('Could not format string "%s"',
1066
self.checker_command,
1067
exc_info=error)
1068
return True # Try again later
524
1069
self.current_checker_command = command
525
try:
526
logger.info("Starting checker %r for %s",
527
command, self.name)
528
# We don't need to redirect stdout and stderr, since
529
# in normal mode, that is already done by daemon(),
530
# and in debug mode we don't want to. (Stdin is
531
# always replaced by /dev/null.)
532
self.checker = subprocess.Popen(command,
533
close_fds=True,
534
shell=True, cwd="/")
535
self.checker_callback_tag = (gobject.child_watch_add
536
(self.checker.pid,
537
self.checker_callback,
538
data=command))
539
# The checker may have completed before the gobject
540
# watch was added. Check for this.
541
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
542
if pid:
543
gobject.source_remove(self.checker_callback_tag)
544
self.checker_callback(pid, status, command)
545
except OSError as error:
546
logger.error("Failed to start subprocess: %s",
547
error)
548
# Re-run this periodically if run by gobject.timeout_add
1070
logger.info("Starting checker %r for %s", command,
1071
self.name)
1072
# We don't need to redirect stdout and stderr, since
1073
# in normal mode, that is already done by daemon(),
1074
# and in debug mode we don't want to. (Stdin is
1075
# always replaced by /dev/null.)
1076
# The exception is when not debugging but nevertheless
1077
# running in the foreground; use the previously
1078
# created wnull.
1079
popen_args = {"close_fds": True,
1080
"shell": True,
1081
"cwd": "/"}
1082
if (not self.server_settings["debug"]
1083
and self.server_settings["foreground"]):
1084
popen_args.update({"stdout": wnull,
1085
"stderr": wnull})
1086
pipe = multiprocessing.Pipe(duplex=False)
1087
self.checker = multiprocessing.Process(
1088
target=call_pipe,
1089
args=(pipe[1], subprocess.call, command),
1090
kwargs=popen_args)
1091
self.checker.start()
1092
self.checker_callback_tag = GLib.io_add_watch(
1093
pipe[0].fileno(), GLib.IO_IN,
1094
self.checker_callback, pipe[0], command)
1095
# Re-run this periodically if run by GLib.timeout_add
549
1096
return True
550
1097
551
1098
def stop_checker(self):
552
1099
"""Force the checker process, if any, to stop."""
553
1100
if self.checker_callback_tag:
554
gobject.source_remove(self.checker_callback_tag)
1101
GLib.source_remove(self.checker_callback_tag)
555
1102
self.checker_callback_tag = None
556
1103
if getattr(self, "checker", None) is None:
557
1104
return
558
1105
logger.debug("Stopping checker for %(name)s", vars(self))
559
try:
560
os.kill(self.checker.pid, signal.SIGTERM)
561
#time.sleep(0.5)
562
#if self.checker.poll() is None:
563
# os.kill(self.checker.pid, signal.SIGKILL)
564
except OSError as error:
565
if error.errno != errno.ESRCH: # No such process
566
raise
1106
self.checker.terminate()
567
1107
self.checker = None
568
1108
569
1109
570
def dbus_service_property(dbus_interface, signature="v",
571
access="readwrite", byte_arrays=False):
1110
def dbus_service_property(dbus_interface,
1111
signature="v",
1112
access="readwrite",
1113
byte_arrays=False):
572
1114
"""Decorators for marking methods of a DBusObjectWithProperties to
573
1115
become properties on the D-Bus.
574
1116
575
1117
The decorated method will be called with no arguments by "Get"
576
1118
and with one argument by "Set".
577
1119
578
1120
The parameters, where they are supported, are the same as
579
1121
dbus.service.method, except there is only "signature", since the
580
1122
type from Get() and the type sent to Set() is the same.
583
1125
# "Set" method, so we fail early here:
584
1126
if byte_arrays and signature != "ay":
585
1127
raise ValueError("Byte arrays not supported for non-'ay'"
586
" signature %r" % signature)
1128
" signature {!r}".format(signature))
1129
587
1130
def decorator(func):
588
1131
func._dbus_is_property = True
589
1132
func._dbus_interface = dbus_interface
592
1135
func._dbus_name = func.__name__
593
1136
if func._dbus_name.endswith("_dbus_property"):
594
1137
func._dbus_name = func._dbus_name[:-14]
595
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
596
return func
1138
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1139
return func
1140
1141
return decorator
1142
1143
1144
def dbus_interface_annotations(dbus_interface):
1145
"""Decorator for marking functions returning interface annotations
1146
1147
Usage:
1148
1149
@dbus_interface_annotations("org.example.Interface")
1150
def _foo(self): # Function name does not matter
1151
return {"org.freedesktop.DBus.Deprecated": "true",
1152
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1153
"false"}
1154
"""
1155
1156
def decorator(func):
1157
func._dbus_is_interface = True
1158
func._dbus_interface = dbus_interface
1159
func._dbus_name = dbus_interface
1160
return func
1161
1162
return decorator
1163
1164
1165
def dbus_annotations(annotations):
1166
"""Decorator to annotate D-Bus methods, signals or properties
1167
Usage:
1168
1169
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1170
"org.freedesktop.DBus.Property."
1171
"EmitsChangedSignal": "false"})
1172
@dbus_service_property("org.example.Interface", signature="b",
1173
access="r")
1174
def Property_dbus_property(self):
1175
return dbus.Boolean(False)
1176
1177
See also the DBusObjectWithAnnotations class.
1178
"""
1179
1180
def decorator(func):
1181
func._dbus_annotations = annotations
1182
return func
1183
597
1184
return decorator
598
1185
599
1186
600
1187
class DBusPropertyException(dbus.exceptions.DBusException):
601
1188
"""A base class for D-Bus property-related exceptions
602
1189
"""
603
def __unicode__(self):
604
return unicode(str(self))
1190
pass
605
1191
606
1192
607
1193
class DBusPropertyAccessException(DBusPropertyException):
616
1202
pass
617
1203
618
1204
619
class DBusObjectWithProperties(dbus.service.Object):
1205
class DBusObjectWithAnnotations(dbus.service.Object):
1206
"""A D-Bus object with annotations.
1207
1208
Classes inheriting from this can use the dbus_annotations
1209
decorator to add annotations to methods or signals.
1210
"""
1211
1212
@staticmethod
1213
def _is_dbus_thing(thing):
1214
"""Returns a function testing if an attribute is a D-Bus thing
1215
1216
If called like _is_dbus_thing("method") it returns a function
1217
suitable for use as predicate to inspect.getmembers().
1218
"""
1219
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1220
False)
1221
1222
def _get_all_dbus_things(self, thing):
1223
"""Returns a generator of (name, attribute) pairs
1224
"""
1225
return ((getattr(athing.__get__(self), "_dbus_name", name),
1226
athing.__get__(self))
1227
for cls in self.__class__.__mro__
1228
for name, athing in
1229
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1230
1231
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1232
out_signature="s",
1233
path_keyword='object_path',
1234
connection_keyword='connection')
1235
def Introspect(self, object_path, connection):
1236
"""Overloading of standard D-Bus method.
1237
1238
Inserts annotation tags on methods and signals.
1239
"""
1240
xmlstring = dbus.service.Object.Introspect(self, object_path,
1241
connection)
1242
try:
1243
document = xml.dom.minidom.parseString(xmlstring)
1244
1245
for if_tag in document.getElementsByTagName("interface"):
1246
# Add annotation tags
1247
for typ in ("method", "signal"):
1248
for tag in if_tag.getElementsByTagName(typ):
1249
annots = dict()
1250
for name, prop in (self.
1251
_get_all_dbus_things(typ)):
1252
if (name == tag.getAttribute("name")
1253
and prop._dbus_interface
1254
== if_tag.getAttribute("name")):
1255
annots.update(getattr(
1256
prop, "_dbus_annotations", {}))
1257
for name, value in annots.items():
1258
ann_tag = document.createElement(
1259
"annotation")
1260
ann_tag.setAttribute("name", name)
1261
ann_tag.setAttribute("value", value)
1262
tag.appendChild(ann_tag)
1263
# Add interface annotation tags
1264
for annotation, value in dict(
1265
itertools.chain.from_iterable(
1266
annotations().items()
1267
for name, annotations
1268
in self._get_all_dbus_things("interface")
1269
if name == if_tag.getAttribute("name")
1270
)).items():
1271
ann_tag = document.createElement("annotation")
1272
ann_tag.setAttribute("name", annotation)
1273
ann_tag.setAttribute("value", value)
1274
if_tag.appendChild(ann_tag)
1275
# Fix argument name for the Introspect method itself
1276
if (if_tag.getAttribute("name")
1277
== dbus.INTROSPECTABLE_IFACE):
1278
for cn in if_tag.getElementsByTagName("method"):
1279
if cn.getAttribute("name") == "Introspect":
1280
for arg in cn.getElementsByTagName("arg"):
1281
if (arg.getAttribute("direction")
1282
== "out"):
1283
arg.setAttribute("name",
1284
"xml_data")
1285
xmlstring = document.toxml("utf-8")
1286
document.unlink()
1287
except (AttributeError, xml.dom.DOMException,
1288
xml.parsers.expat.ExpatError) as error:
1289
logger.error("Failed to override Introspection method",
1290
exc_info=error)
1291
return xmlstring
1292
1293
1294
class DBusObjectWithProperties(DBusObjectWithAnnotations):
620
1295
"""A D-Bus object with properties.
621
1296
622
1297
Classes inheriting from this can use the dbus_service_property
623
1298
decorator to expose methods as D-Bus properties. It exposes the
624
1299
standard Get(), Set(), and GetAll() methods on the D-Bus.
625
1300
"""
626
627
@staticmethod
628
def _is_dbus_property(obj):
629
return getattr(obj, "_dbus_is_property", False)
630
631
def _get_all_dbus_properties(self):
632
"""Returns a generator of (name, attribute) pairs
633
"""
634
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
635
for cls in self.__class__.__mro__
636
for name, prop in
637
inspect.getmembers(cls, self._is_dbus_property))
638
1301
639
1302
def _get_dbus_property(self, interface_name, property_name):
640
1303
"""Returns a bound method if one exists which is a D-Bus
641
1304
property with the specified name and interface.
642
1305
"""
643
for cls in self.__class__.__mro__:
644
for name, value in (inspect.getmembers
645
(cls, self._is_dbus_property)):
1306
for cls in self.__class__.__mro__:
1307
for name, value in inspect.getmembers(
1308
cls, self._is_dbus_thing("property")):
646
1309
if (value._dbus_name == property_name
647
1310
and value._dbus_interface == interface_name):
648
1311
return value.__get__(self)
649
1312
650
1313
# No such property
651
raise DBusPropertyNotFound(self.dbus_object_path + ":"
652
+ interface_name + "."
653
+ property_name)
654
655
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1314
raise DBusPropertyNotFound("{}:{}.{}".format(
1315
self.dbus_object_path, interface_name, property_name))
1316
1317
@classmethod
1318
def _get_all_interface_names(cls):
1319
"""Get a sequence of all interfaces supported by an object"""
1320
return (name for name in set(getattr(getattr(x, attr),
1321
"_dbus_interface", None)
1322
for x in (inspect.getmro(cls))
1323
for attr in dir(x))
1324
if name is not None)
1325
1326
@dbus.service.method(dbus.PROPERTIES_IFACE,
1327
in_signature="ss",
656
1328
out_signature="v")
657
1329
def Get(self, interface_name, property_name):
658
1330
"""Standard D-Bus property Get() method, see D-Bus standard.
664
1336
if not hasattr(value, "variant_level"):
665
1337
return value
666
1338
return type(value)(value, variant_level=value.variant_level+1)
667
1339
668
1340
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
669
1341
def Set(self, interface_name, property_name, value):
670
1342
"""Standard D-Bus property Set() method, see D-Bus standard.
676
1348
# The byte_arrays option is not supported yet on
677
1349
# signatures other than "ay".
678
1350
if prop._dbus_signature != "ay":
679
raise ValueError
680
value = dbus.ByteArray(''.join(unichr(byte)
681
for byte in value))
1351
raise ValueError("Byte arrays not supported for non-"
1352
"'ay' signature {!r}"
1353
.format(prop._dbus_signature))
1354
value = dbus.ByteArray(b''.join(chr(byte)
1355
for byte in value))
682
1356
prop(value)
683
684
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1357
1358
@dbus.service.method(dbus.PROPERTIES_IFACE,
1359
in_signature="s",
685
1360
out_signature="a{sv}")
686
1361
def GetAll(self, interface_name):
687
1362
"""Standard D-Bus property GetAll() method, see D-Bus
688
1363
standard.
689
1364
690
1365
Note: Will not include properties with access="write".
691
1366
"""
692
all = {}
693
for name, prop in self._get_all_dbus_properties():
1367
properties = {}
1368
for name, prop in self._get_all_dbus_things("property"):
694
1369
if (interface_name
695
1370
and interface_name != prop._dbus_interface):
696
1371
# Interface non-empty but did not match
700
1375
continue
701
1376
value = prop()
702
1377
if not hasattr(value, "variant_level"):
703
all[name] = value
1378
properties[name] = value
704
1379
continue
705
all[name] = type(value)(value, variant_level=
706
value.variant_level+1)
707
return dbus.Dictionary(all, signature="sv")
708
1380
properties[name] = type(value)(
1381
value, variant_level=value.variant_level + 1)
1382
return dbus.Dictionary(properties, signature="sv")
1383
1384
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1385
def PropertiesChanged(self, interface_name, changed_properties,
1386
invalidated_properties):
1387
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1388
standard.
1389
"""
1390
pass
1391
709
1392
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
710
1393
out_signature="s",
711
1394
path_keyword='object_path',
712
1395
connection_keyword='connection')
713
1396
def Introspect(self, object_path, connection):
714
"""Standard D-Bus method, overloaded to insert property tags.
1397
"""Overloading of standard D-Bus method.
1398
1399
Inserts property tags and interface annotation tags.
715
1400
"""
716
xmlstring = dbus.service.Object.Introspect(self, object_path,
717
connection)
1401
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1402
object_path,
1403
connection)
718
1404
try:
719
1405
document = xml.dom.minidom.parseString(xmlstring)
1406
720
1407
def make_tag(document, name, prop):
721
1408
e = document.createElement("property")
722
1409
e.setAttribute("name", name)
723
1410
e.setAttribute("type", prop._dbus_signature)
724
1411
e.setAttribute("access", prop._dbus_access)
725
1412
return e
1413
726
1414
for if_tag in document.getElementsByTagName("interface"):
1415
# Add property tags
727
1416
for tag in (make_tag(document, name, prop)
728
1417
for name, prop
729
in self._get_all_dbus_properties()
1418
in self._get_all_dbus_things("property")
730
1419
if prop._dbus_interface
731
1420
== if_tag.getAttribute("name")):
732
1421
if_tag.appendChild(tag)
1422
# Add annotation tags for properties
1423
for tag in if_tag.getElementsByTagName("property"):
1424
annots = dict()
1425
for name, prop in self._get_all_dbus_things(
1426
"property"):
1427
if (name == tag.getAttribute("name")
1428
and prop._dbus_interface
1429
== if_tag.getAttribute("name")):
1430
annots.update(getattr(
1431
prop, "_dbus_annotations", {}))
1432
for name, value in annots.items():
1433
ann_tag = document.createElement(
1434
"annotation")
1435
ann_tag.setAttribute("name", name)
1436
ann_tag.setAttribute("value", value)
1437
tag.appendChild(ann_tag)
733
1438
# Add the names to the return values for the
734
1439
# "org.freedesktop.DBus.Properties" methods
735
1440
if (if_tag.getAttribute("name")
750
1455
except (AttributeError, xml.dom.DOMException,
751
1456
xml.parsers.expat.ExpatError) as error:
752
1457
logger.error("Failed to override Introspection method",
753
error)
754
return xmlstring
755
756
757
def datetime_to_dbus (dt, variant_level=0):
1458
exc_info=error)
1459
return xmlstring
1460
1461
try:
1462
dbus.OBJECT_MANAGER_IFACE
1463
except AttributeError:
1464
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1465
1466
1467
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1468
"""A D-Bus object with an ObjectManager.
1469
1470
Classes inheriting from this exposes the standard
1471
GetManagedObjects call and the InterfacesAdded and
1472
InterfacesRemoved signals on the standard
1473
"org.freedesktop.DBus.ObjectManager" interface.
1474
1475
Note: No signals are sent automatically; they must be sent
1476
manually.
1477
"""
1478
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1479
out_signature="a{oa{sa{sv}}}")
1480
def GetManagedObjects(self):
1481
"""This function must be overridden"""
1482
raise NotImplementedError()
1483
1484
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1485
signature="oa{sa{sv}}")
1486
def InterfacesAdded(self, object_path, interfaces_and_properties):
1487
pass
1488
1489
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1490
def InterfacesRemoved(self, object_path, interfaces):
1491
pass
1492
1493
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1494
out_signature="s",
1495
path_keyword='object_path',
1496
connection_keyword='connection')
1497
def Introspect(self, object_path, connection):
1498
"""Overloading of standard D-Bus method.
1499
1500
Override return argument name of GetManagedObjects to be
1501
"objpath_interfaces_and_properties"
1502
"""
1503
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1504
object_path,
1505
connection)
1506
try:
1507
document = xml.dom.minidom.parseString(xmlstring)
1508
1509
for if_tag in document.getElementsByTagName("interface"):
1510
# Fix argument name for the GetManagedObjects method
1511
if (if_tag.getAttribute("name")
1512
== dbus.OBJECT_MANAGER_IFACE):
1513
for cn in if_tag.getElementsByTagName("method"):
1514
if (cn.getAttribute("name")
1515
== "GetManagedObjects"):
1516
for arg in cn.getElementsByTagName("arg"):
1517
if (arg.getAttribute("direction")
1518
== "out"):
1519
arg.setAttribute(
1520
"name",
1521
"objpath_interfaces"
1522
"_and_properties")
1523
xmlstring = document.toxml("utf-8")
1524
document.unlink()
1525
except (AttributeError, xml.dom.DOMException,
1526
xml.parsers.expat.ExpatError) as error:
1527
logger.error("Failed to override Introspection method",
1528
exc_info=error)
1529
return xmlstring
1530
1531
1532
def datetime_to_dbus(dt, variant_level=0):
758
1533
"""Convert a UTC datetime.datetime() to a D-Bus type."""
759
1534
if dt is None:
760
return dbus.String("", variant_level = variant_level)
761
return dbus.String(dt.isoformat(),
762
variant_level=variant_level)
763
764
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
765
.__metaclass__):
766
"""Applied to an empty subclass of a D-Bus object, this metaclass
767
will add additional D-Bus attributes matching a certain pattern.
1535
return dbus.String("", variant_level=variant_level)
1536
return dbus.String(dt.isoformat(), variant_level=variant_level)
1537
1538
1539
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1540
"""A class decorator; applied to a subclass of
1541
dbus.service.Object, it will add alternate D-Bus attributes with
1542
interface names according to the "alt_interface_names" mapping.
1543
Usage:
1544
1545
@alternate_dbus_interfaces({"org.example.Interface":
1546
"net.example.AlternateInterface"})
1547
class SampleDBusObject(dbus.service.Object):
1548
@dbus.service.method("org.example.Interface")
1549
def SampleDBusMethod():
1550
pass
1551
1552
The above "SampleDBusMethod" on "SampleDBusObject" will be
1553
reachable via two interfaces: "org.example.Interface" and
1554
"net.example.AlternateInterface", the latter of which will have
1555
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1556
"true", unless "deprecate" is passed with a False value.
1557
1558
This works for methods and signals, and also for D-Bus properties
1559
(from DBusObjectWithProperties) and interfaces (from the
1560
dbus_interface_annotations decorator).
768
1561
"""
769
def __new__(mcs, name, bases, attr):
770
# Go through all the base classes which could have D-Bus
771
# methods, signals, or properties in them
772
for base in (b for b in bases
773
if issubclass(b, dbus.service.Object)):
774
# Go though all attributes of the base class
775
for attrname, attribute in inspect.getmembers(base):
1562
1563
def wrapper(cls):
1564
for orig_interface_name, alt_interface_name in (
1565
alt_interface_names.items()):
1566
attr = {}
1567
interface_names = set()
1568
# Go though all attributes of the class
1569
for attrname, attribute in inspect.getmembers(cls):
776
1570
# Ignore non-D-Bus attributes, and D-Bus attributes
777
1571
# with the wrong interface name
778
1572
if (not hasattr(attribute, "_dbus_interface")
779
or not attribute._dbus_interface
780
.startswith("se.recompile.Mandos")):
1573
or not attribute._dbus_interface.startswith(
1574
orig_interface_name)):
781
1575
continue
782
1576
# Create an alternate D-Bus interface name based on
783
1577
# the current name
784
alt_interface = (attribute._dbus_interface
785
.replace("se.recompile.Mandos",
786
"se.bsnet.fukt.Mandos"))
1578
alt_interface = attribute._dbus_interface.replace(
1579
orig_interface_name, alt_interface_name)
1580
interface_names.add(alt_interface)
787
1581
# Is this a D-Bus signal?
788
1582
if getattr(attribute, "_dbus_is_signal", False):
789
# Extract the original non-method function by
790
# black magic
791
nonmethod_func = (dict(
1583
# Extract the original non-method undecorated
1584
# function by black magic
1585
if sys.version_info.major == 2:
1586
nonmethod_func = (dict(
792
1587
zip(attribute.func_code.co_freevars,
793
attribute.__closure__))["func"]
794
.cell_contents)
1588
attribute.__closure__))
1589
["func"].cell_contents)
1590
else:
1591
nonmethod_func = (dict(
1592
zip(attribute.__code__.co_freevars,
1593
attribute.__closure__))
1594
["func"].cell_contents)
795
1595
# Create a new, but exactly alike, function
796
1596
# object, and decorate it to be a new D-Bus signal
797
1597
# with the alternate D-Bus interface name
798
new_function = (dbus.service.signal
799
(alt_interface,
800
attribute._dbus_signature)
801
(types.FunctionType(
802
nonmethod_func.func_code,
803
nonmethod_func.func_globals,
804
nonmethod_func.func_name,
805
nonmethod_func.func_defaults,
806
nonmethod_func.func_closure)))
1598
new_function = copy_function(nonmethod_func)
1599
new_function = (dbus.service.signal(
1600
alt_interface,
1601
attribute._dbus_signature)(new_function))
1602
# Copy annotations, if any
1603
try:
1604
new_function._dbus_annotations = dict(
1605
attribute._dbus_annotations)
1606
except AttributeError:
1607
pass
1608
807
1609
# Define a creator of a function to call both the
808
# old and new functions, so both the old and new
809
# signals gets sent when the function is called
1610
# original and alternate functions, so both the
1611
# original and alternate signals gets sent when
1612
# the function is called
810
1613
def fixscope(func1, func2):
811
1614
"""This function is a scope container to pass
812
1615
func1 and func2 to the "call_both" function
813
1616
outside of its arguments"""
1617
1618
@functools.wraps(func2)
814
1619
def call_both(*args, **kwargs):
815
1620
"""This function will emit two D-Bus
816
1621
signals by calling func1 and func2"""
817
1622
func1(*args, **kwargs)
818
1623
func2(*args, **kwargs)
1624
# Make wrapper function look like a D-Bus
1625
# signal
1626
for name, attr in inspect.getmembers(func2):
1627
if name.startswith("_dbus_"):
1628
setattr(call_both, name, attr)
1629
819
1630
return call_both
820
1631
# Create the "call_both" function and add it to
821
1632
# the class
822
attr[attrname] = fixscope(attribute,
823
new_function)
1633
attr[attrname] = fixscope(attribute, new_function)
824
1634
# Is this a D-Bus method?
825
1635
elif getattr(attribute, "_dbus_is_method", False):
826
1636
# Create a new, but exactly alike, function
827
1637
# object. Decorate it to be a new D-Bus method
828
1638
# with the alternate D-Bus interface name. Add it
829
1639
# to the class.
830
attr[attrname] = (dbus.service.method
831
(alt_interface,
832
attribute._dbus_in_signature,
833
attribute._dbus_out_signature)
834
(types.FunctionType
835
(attribute.func_code,
836
attribute.func_globals,
837
attribute.func_name,
838
attribute.func_defaults,
839
attribute.func_closure)))
1640
attr[attrname] = (
1641
dbus.service.method(
1642
alt_interface,
1643
attribute._dbus_in_signature,
1644
attribute._dbus_out_signature)
1645
(copy_function(attribute)))
1646
# Copy annotations, if any
1647
try:
1648
attr[attrname]._dbus_annotations = dict(
1649
attribute._dbus_annotations)
1650
except AttributeError:
1651
pass
840
1652
# Is this a D-Bus property?
841
1653
elif getattr(attribute, "_dbus_is_property", False):
842
1654
# Create a new, but exactly alike, function
843
1655
# object, and decorate it to be a new D-Bus
844
1656
# property with the alternate D-Bus interface
845
1657
# name. Add it to the class.
846
attr[attrname] = (dbus_service_property
847
(alt_interface,
848
attribute._dbus_signature,
849
attribute._dbus_access,
850
attribute
851
._dbus_get_args_options
852
["byte_arrays"])
853
(types.FunctionType
854
(attribute.func_code,
855
attribute.func_globals,
856
attribute.func_name,
857
attribute.func_defaults,
858
attribute.func_closure)))
859
return type.__new__(mcs, name, bases, attr)
860
1658
attr[attrname] = (dbus_service_property(
1659
alt_interface, attribute._dbus_signature,
1660
attribute._dbus_access,
1661
attribute._dbus_get_args_options
1662
["byte_arrays"])
1663
(copy_function(attribute)))
1664
# Copy annotations, if any
1665
try:
1666
attr[attrname]._dbus_annotations = dict(
1667
attribute._dbus_annotations)
1668
except AttributeError:
1669
pass
1670
# Is this a D-Bus interface?
1671
elif getattr(attribute, "_dbus_is_interface", False):
1672
# Create a new, but exactly alike, function
1673
# object. Decorate it to be a new D-Bus interface
1674
# with the alternate D-Bus interface name. Add it
1675
# to the class.
1676
attr[attrname] = (
1677
dbus_interface_annotations(alt_interface)
1678
(copy_function(attribute)))
1679
if deprecate:
1680
# Deprecate all alternate interfaces
1681
iname = "_AlternateDBusNames_interface_annotation{}"
1682
for interface_name in interface_names:
1683
1684
@dbus_interface_annotations(interface_name)
1685
def func(self):
1686
return {"org.freedesktop.DBus.Deprecated":
1687
"true"}
1688
# Find an unused name
1689
for aname in (iname.format(i)
1690
for i in itertools.count()):
1691
if aname not in attr:
1692
attr[aname] = func
1693
break
1694
if interface_names:
1695
# Replace the class with a new subclass of it with
1696
# methods, signals, etc. as created above.
1697
if sys.version_info.major == 2:
1698
cls = type(b"{}Alternate".format(cls.__name__),
1699
(cls, ), attr)
1700
else:
1701
cls = type("{}Alternate".format(cls.__name__),
1702
(cls, ), attr)
1703
return cls
1704
1705
return wrapper
1706
1707
1708
@alternate_dbus_interfaces({"se.recompile.Mandos":
1709
"se.bsnet.fukt.Mandos"})
861
1710
class ClientDBus(Client, DBusObjectWithProperties):
862
1711
"""A Client class using D-Bus
863
1712
864
1713
Attributes:
865
1714
dbus_object_path: dbus.ObjectPath
866
1715
bus: dbus.SystemBus()
867
1716
"""
868
1717
869
1718
runtime_expansions = (Client.runtime_expansions
870
+ ("dbus_object_path",))
871
1719
+ ("dbus_object_path", ))
1720
1721
_interface = "se.recompile.Mandos.Client"
1722
872
1723
# dbus.service.Object doesn't use super(), so we can't either.
873
874
def __init__(self, bus = None, *args, **kwargs):
875
self._approvals_pending = 0
1724
1725
def __init__(self, bus=None, *args, **kwargs):
876
1726
self.bus = bus
877
1727
Client.__init__(self, *args, **kwargs)
878
1728
# Only now, when this client is initialized, can it show up on
879
1729
# the D-Bus
880
client_object_name = unicode(self.name).translate(
1730
client_object_name = str(self.name).translate(
881
1731
{ord("."): ord("_"),
882
1732
ord("-"): ord("_")})
883
self.dbus_object_path = (dbus.ObjectPath
884
("/clients/" + client_object_name))
1733
self.dbus_object_path = dbus.ObjectPath(
1734
"/clients/" + client_object_name)
885
1735
DBusObjectWithProperties.__init__(self, self.bus,
886
1736
self.dbus_object_path)
887
888
def notifychangeproperty(transform_func,
889
dbus_name, type_func=lambda x: x,
890
variant_level=1):
1737
1738
def notifychangeproperty(transform_func, dbus_name,
1739
type_func=lambda x: x,
1740
variant_level=1,
1741
invalidate_only=False,
1742
_interface=_interface):
891
1743
""" Modify a variable so that it's a property which announces
892
1744
its changes to DBus.
893
1745
894
transform_fun: Function that takes a value and transforms it
895
to a D-Bus type.
1746
transform_fun: Function that takes a value and a variant_level
1747
and transforms it to a D-Bus type.
896
1748
dbus_name: D-Bus name of the variable
897
1749
type_func: Function that transform the value before sending it
898
1750
to the D-Bus. Default: no transform
899
1751
variant_level: D-Bus variant level. Default: 1
900
1752
"""
901
attrname = "_{0}".format(dbus_name)
1753
attrname = "_{}".format(dbus_name)
1754
902
1755
def setter(self, value):
903
1756
if hasattr(self, "dbus_object_path"):
904
1757
if (not hasattr(self, attrname) or
905
1758
type_func(getattr(self, attrname, None))
906
1759
!= type_func(value)):
907
dbus_value = transform_func(type_func(value),
908
variant_level)
909
self.PropertyChanged(dbus.String(dbus_name),
910
dbus_value)
1760
if invalidate_only:
1761
self.PropertiesChanged(
1762
_interface, dbus.Dictionary(),
1763
dbus.Array((dbus_name, )))
1764
else:
1765
dbus_value = transform_func(
1766
type_func(value),
1767
variant_level=variant_level)
1768
self.PropertyChanged(dbus.String(dbus_name),
1769
dbus_value)
1770
self.PropertiesChanged(
1771
_interface,
1772
dbus.Dictionary({dbus.String(dbus_name):
1773
dbus_value}),
1774
dbus.Array())
911
1775
setattr(self, attrname, value)
912
1776
913
1777
return property(lambda self: getattr(self, attrname), setter)
914
915
1778
916
1779
expires = notifychangeproperty(datetime_to_dbus, "Expires")
917
1780
approvals_pending = notifychangeproperty(dbus.Boolean,
918
1781
"ApprovalPending",
919
type_func = bool)
1782
type_func=bool)
920
1783
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
921
1784
last_enabled = notifychangeproperty(datetime_to_dbus,
922
1785
"LastEnabled")
923
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
924
type_func = lambda checker:
925
checker is not None)
1786
checker = notifychangeproperty(
1787
dbus.Boolean, "CheckerRunning",
1788
type_func=lambda checker: checker is not None)
926
1789
last_checked_ok = notifychangeproperty(datetime_to_dbus,
927
1790
"LastCheckedOK")
1791
last_checker_status = notifychangeproperty(dbus.Int16,
1792
"LastCheckerStatus")
928
1793
last_approval_request = notifychangeproperty(
929
1794
datetime_to_dbus, "LastApprovalRequest")
930
1795
approved_by_default = notifychangeproperty(dbus.Boolean,
931
1796
"ApprovedByDefault")
932
approval_delay = notifychangeproperty(dbus.UInt16,
933
"ApprovalDelay",
934
type_func =
935
_timedelta_to_milliseconds)
1797
approval_delay = notifychangeproperty(
1798
dbus.UInt64, "ApprovalDelay",
1799
type_func=lambda td: td.total_seconds() * 1000)
936
1800
approval_duration = notifychangeproperty(
937
dbus.UInt16, "ApprovalDuration",
938
type_func = _timedelta_to_milliseconds)
1801
dbus.UInt64, "ApprovalDuration",
1802
type_func=lambda td: td.total_seconds() * 1000)
939
1803
host = notifychangeproperty(dbus.String, "Host")
940
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
941
type_func =
942
_timedelta_to_milliseconds)
1804
timeout = notifychangeproperty(
1805
dbus.UInt64, "Timeout",
1806
type_func=lambda td: td.total_seconds() * 1000)
943
1807
extended_timeout = notifychangeproperty(
944
dbus.UInt16, "ExtendedTimeout",
945
type_func = _timedelta_to_milliseconds)
946
interval = notifychangeproperty(dbus.UInt16,
947
"Interval",
948
type_func =
949
_timedelta_to_milliseconds)
1808
dbus.UInt64, "ExtendedTimeout",
1809
type_func=lambda td: td.total_seconds() * 1000)
1810
interval = notifychangeproperty(
1811
dbus.UInt64, "Interval",
1812
type_func=lambda td: td.total_seconds() * 1000)
950
1813
checker_command = notifychangeproperty(dbus.String, "Checker")
951
1814
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1815
invalidate_only=True)
1816
952
1817
del notifychangeproperty
953
1818
954
1819
def __del__(self, *args, **kwargs):
955
1820
try:
956
1821
self.remove_from_connection()
959
1824
if hasattr(DBusObjectWithProperties, "__del__"):
960
1825
DBusObjectWithProperties.__del__(self, *args, **kwargs)
961
1826
Client.__del__(self, *args, **kwargs)
962
963
def checker_callback(self, pid, condition, command,
964
*args, **kwargs):
965
self.checker_callback_tag = None
966
self.checker = None
967
if os.WIFEXITED(condition):
968
exitstatus = os.WEXITSTATUS(condition)
1827
1828
def checker_callback(self, source, condition,
1829
connection, command, *args, **kwargs):
1830
ret = Client.checker_callback(self, source, condition,
1831
connection, command, *args,
1832
**kwargs)
1833
exitstatus = self.last_checker_status
1834
if exitstatus >= 0:
969
1835
# Emit D-Bus signal
970
1836
self.CheckerCompleted(dbus.Int16(exitstatus),
971
dbus.Int64(condition),
1837
# This is specific to GNU libC
1838
dbus.Int64(exitstatus << 8),
972
1839
dbus.String(command))
973
1840
else:
974
1841
# Emit D-Bus signal
975
1842
self.CheckerCompleted(dbus.Int16(-1),
976
dbus.Int64(condition),
1843
dbus.Int64(
1844
# This is specific to GNU libC
1845
(exitstatus << 8)
1846
| self.last_checker_signal),
977
1847
dbus.String(command))
978
979
return Client.checker_callback(self, pid, condition, command,
980
*args, **kwargs)
981
1848
return ret
1849
982
1850
def start_checker(self, *args, **kwargs):
983
old_checker = self.checker
984
if self.checker is not None:
985
old_checker_pid = self.checker.pid
986
else:
987
old_checker_pid = None
1851
old_checker_pid = getattr(self.checker, "pid", None)
988
1852
r = Client.start_checker(self, *args, **kwargs)
989
1853
# Only if new checker process was started
990
1854
if (self.checker is not None
992
1856
# Emit D-Bus signal
993
1857
self.CheckerStarted(self.current_checker_command)
994
1858
return r
995
1859
996
1860
def _reset_approved(self):
997
self._approved = None
1861
self.approved = None
998
1862
return False
999
1863
1000
1864
def approve(self, value=True):
1865
self.approved = value
1866
GLib.timeout_add(int(self.approval_duration.total_seconds()
1867
* 1000), self._reset_approved)
1001
1868
self.send_changedstate()
1002
self._approved = value
1003
gobject.timeout_add(_timedelta_to_milliseconds
1004
(self.approval_duration),
1005
self._reset_approved)
1006
1007
1008
## D-Bus methods, signals & properties
1009
_interface = "se.recompile.Mandos.Client"
1010
1011
## Signals
1012
1869
1870
# D-Bus methods, signals & properties
1871
1872
# Interfaces
1873
1874
# Signals
1875
1013
1876
# CheckerCompleted - signal
1014
1877
@dbus.service.signal(_interface, signature="nxs")
1015
1878
def CheckerCompleted(self, exitcode, waitstatus, command):
1016
1879
"D-Bus signal"
1017
1880
pass
1018
1881
1019
1882
# CheckerStarted - signal
1020
1883
@dbus.service.signal(_interface, signature="s")
1021
1884
def CheckerStarted(self, command):
1022
1885
"D-Bus signal"
1023
1886
pass
1024
1887
1025
1888
# PropertyChanged - signal
1889
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1026
1890
@dbus.service.signal(_interface, signature="sv")
1027
1891
def PropertyChanged(self, property, value):
1028
1892
"D-Bus signal"
1029
1893
pass
1030
1894
1031
1895
# GotSecret - signal
1032
1896
@dbus.service.signal(_interface)
1033
1897
def GotSecret(self):
1036
1900
server to mandos-client
1037
1901
"""
1038
1902
pass
1039
1903
1040
1904
# Rejected - signal
1041
1905
@dbus.service.signal(_interface, signature="s")
1042
1906
def Rejected(self, reason):
1043
1907
"D-Bus signal"
1044
1908
pass
1045
1909
1046
1910
# NeedApproval - signal
1047
1911
@dbus.service.signal(_interface, signature="tb")
1048
1912
def NeedApproval(self, timeout, default):
1049
1913
"D-Bus signal"
1050
1914
return self.need_approval()
1051
1052
## Methods
1053
1915
1916
# Methods
1917
1054
1918
# Approve - method
1055
1919
@dbus.service.method(_interface, in_signature="b")
1056
1920
def Approve(self, value):
1057
1921
self.approve(value)
1058
1922
1059
1923
# CheckedOK - method
1060
1924
@dbus.service.method(_interface)
1061
1925
def CheckedOK(self):
1062
1926
self.checked_ok()
1063
1927
1064
1928
# Enable - method
1929
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1065
1930
@dbus.service.method(_interface)
1066
1931
def Enable(self):
1067
1932
"D-Bus method"
1068
1933
self.enable()
1069
1934
1070
1935
# StartChecker - method
1936
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1071
1937
@dbus.service.method(_interface)
1072
1938
def StartChecker(self):
1073
1939
"D-Bus method"
1074
1940
self.start_checker()
1075
1941
1076
1942
# Disable - method
1943
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1077
1944
@dbus.service.method(_interface)
1078
1945
def Disable(self):
1079
1946
"D-Bus method"
1080
1947
self.disable()
1081
1948
1082
1949
# StopChecker - method
1950
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1083
1951
@dbus.service.method(_interface)
1084
1952
def StopChecker(self):
1085
1953
self.stop_checker()
1086
1087
## Properties
1088
1954
1955
# Properties
1956
1089
1957
# ApprovalPending - property
1090
1958
@dbus_service_property(_interface, signature="b", access="read")
1091
1959
def ApprovalPending_dbus_property(self):
1092
1960
return dbus.Boolean(bool(self.approvals_pending))
1093
1961
1094
1962
# ApprovedByDefault - property
1095
@dbus_service_property(_interface, signature="b",
1963
@dbus_service_property(_interface,
1964
signature="b",
1096
1965
access="readwrite")
1097
1966
def ApprovedByDefault_dbus_property(self, value=None):
1098
1967
if value is None: # get
1099
1968
return dbus.Boolean(self.approved_by_default)
1100
1969
self.approved_by_default = bool(value)
1101
1970
1102
1971
# ApprovalDelay - property
1103
@dbus_service_property(_interface, signature="t",
1972
@dbus_service_property(_interface,
1973
signature="t",
1104
1974
access="readwrite")
1105
1975
def ApprovalDelay_dbus_property(self, value=None):
1106
1976
if value is None: # get
1107
return dbus.UInt64(self.approval_delay_milliseconds())
1977
return dbus.UInt64(self.approval_delay.total_seconds()
1978
* 1000)
1108
1979
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1109
1980
1110
1981
# ApprovalDuration - property
1111
@dbus_service_property(_interface, signature="t",
1982
@dbus_service_property(_interface,
1983
signature="t",
1112
1984
access="readwrite")
1113
1985
def ApprovalDuration_dbus_property(self, value=None):
1114
1986
if value is None: # get
1115
return dbus.UInt64(_timedelta_to_milliseconds(
1116
self.approval_duration))
1987
return dbus.UInt64(self.approval_duration.total_seconds()
1988
* 1000)
1117
1989
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1118
1990
1119
1991
# Name - property
1992
@dbus_annotations(
1993
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1120
1994
@dbus_service_property(_interface, signature="s", access="read")
1121
1995
def Name_dbus_property(self):
1122
1996
return dbus.String(self.name)
1123
1997
1124
1998
# Fingerprint - property
1999
@dbus_annotations(
2000
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1125
2001
@dbus_service_property(_interface, signature="s", access="read")
1126
2002
def Fingerprint_dbus_property(self):
1127
2003
return dbus.String(self.fingerprint)
1128
2004
1129
2005
# Host - property
1130
@dbus_service_property(_interface, signature="s",
2006
@dbus_service_property(_interface,
2007
signature="s",
1131
2008
access="readwrite")
1132
2009
def Host_dbus_property(self, value=None):
1133
2010
if value is None: # get
1134
2011
return dbus.String(self.host)
1135
self.host = value
1136
2012
self.host = str(value)
2013
1137
2014
# Created - property
2015
@dbus_annotations(
2016
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1138
2017
@dbus_service_property(_interface, signature="s", access="read")
1139
2018
def Created_dbus_property(self):
1140
return dbus.String(datetime_to_dbus(self.created))
1141
2019
return datetime_to_dbus(self.created)
2020
1142
2021
# LastEnabled - property
1143
2022
@dbus_service_property(_interface, signature="s", access="read")
1144
2023
def LastEnabled_dbus_property(self):
1145
2024
return datetime_to_dbus(self.last_enabled)
1146
2025
1147
2026
# Enabled - property
1148
@dbus_service_property(_interface, signature="b",
2027
@dbus_service_property(_interface,
2028
signature="b",
1149
2029
access="readwrite")
1150
2030
def Enabled_dbus_property(self, value=None):
1151
2031
if value is None: # get
1154
2034
self.enable()
1155
2035
else:
1156
2036
self.disable()
1157
2037
1158
2038
# LastCheckedOK - property
1159
@dbus_service_property(_interface, signature="s",
2039
@dbus_service_property(_interface,
2040
signature="s",
1160
2041
access="readwrite")
1161
2042
def LastCheckedOK_dbus_property(self, value=None):
1162
2043
if value is not None:
1163
2044
self.checked_ok()
1164
2045
return
1165
2046
return datetime_to_dbus(self.last_checked_ok)
1166
2047
2048
# LastCheckerStatus - property
2049
@dbus_service_property(_interface, signature="n", access="read")
2050
def LastCheckerStatus_dbus_property(self):
2051
return dbus.Int16(self.last_checker_status)
2052
1167
2053
# Expires - property
1168
2054
@dbus_service_property(_interface, signature="s", access="read")
1169
2055
def Expires_dbus_property(self):
1170
2056
return datetime_to_dbus(self.expires)
1171
2057
1172
2058
# LastApprovalRequest - property
1173
2059
@dbus_service_property(_interface, signature="s", access="read")
1174
2060
def LastApprovalRequest_dbus_property(self):
1175
2061
return datetime_to_dbus(self.last_approval_request)
1176
2062
1177
2063
# Timeout - property
1178
@dbus_service_property(_interface, signature="t",
2064
@dbus_service_property(_interface,
2065
signature="t",
1179
2066
access="readwrite")
1180
2067
def Timeout_dbus_property(self, value=None):
1181
2068
if value is None: # get
1182
return dbus.UInt64(self.timeout_milliseconds())
2069
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2070
old_timeout = self.timeout
1183
2071
self.timeout = datetime.timedelta(0, 0, 0, value)
1184
if getattr(self, "disable_initiator_tag", None) is None:
1185
return
1186
# Reschedule timeout
1187
gobject.source_remove(self.disable_initiator_tag)
1188
self.disable_initiator_tag = None
1189
self.expires = None
1190
time_to_die = (self.
1191
_timedelta_to_milliseconds((self
1192
.last_checked_ok
1193
+ self.timeout)
1194
- datetime.datetime
1195
.utcnow()))
1196
if time_to_die <= 0:
1197
# The timeout has passed
1198
self.disable()
1199
else:
1200
self.expires = (datetime.datetime.utcnow()
1201
+ datetime.timedelta(milliseconds =
1202
time_to_die))
1203
self.disable_initiator_tag = (gobject.timeout_add
1204
(time_to_die, self.disable))
1205
2072
# Reschedule disabling
2073
if self.enabled:
2074
now = datetime.datetime.utcnow()
2075
self.expires += self.timeout - old_timeout
2076
if self.expires <= now:
2077
# The timeout has passed
2078
self.disable()
2079
else:
2080
if (getattr(self, "disable_initiator_tag", None)
2081
is None):
2082
return
2083
GLib.source_remove(self.disable_initiator_tag)
2084
self.disable_initiator_tag = GLib.timeout_add(
2085
int((self.expires - now).total_seconds() * 1000),
2086
self.disable)
2087
1206
2088
# ExtendedTimeout - property
1207
@dbus_service_property(_interface, signature="t",
2089
@dbus_service_property(_interface,
2090
signature="t",
1208
2091
access="readwrite")
1209
2092
def ExtendedTimeout_dbus_property(self, value=None):
1210
2093
if value is None: # get
1211
return dbus.UInt64(self.extended_timeout_milliseconds())
2094
return dbus.UInt64(self.extended_timeout.total_seconds()
2095
* 1000)
1212
2096
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1213
2097
1214
2098
# Interval - property
1215
@dbus_service_property(_interface, signature="t",
2099
@dbus_service_property(_interface,
2100
signature="t",
1216
2101
access="readwrite")
1217
2102
def Interval_dbus_property(self, value=None):
1218
2103
if value is None: # get
1219
return dbus.UInt64(self.interval_milliseconds())
2104
return dbus.UInt64(self.interval.total_seconds() * 1000)
1220
2105
self.interval = datetime.timedelta(0, 0, 0, value)
1221
2106
if getattr(self, "checker_initiator_tag", None) is None:
1222
2107
return
1223
# Reschedule checker run
1224
gobject.source_remove(self.checker_initiator_tag)
1225
self.checker_initiator_tag = (gobject.timeout_add
1226
(value, self.start_checker))
1227
self.start_checker() # Start one now, too
1228
2108
if self.enabled:
2109
# Reschedule checker run
2110
GLib.source_remove(self.checker_initiator_tag)
2111
self.checker_initiator_tag = GLib.timeout_add(
2112
value, self.start_checker)
2113
self.start_checker() # Start one now, too
2114
1229
2115
# Checker - property
1230
@dbus_service_property(_interface, signature="s",
2116
@dbus_service_property(_interface,
2117
signature="s",
1231
2118
access="readwrite")
1232
2119
def Checker_dbus_property(self, value=None):
1233
2120
if value is None: # get
1234
2121
return dbus.String(self.checker_command)
1235
self.checker_command = value
1236
2122
self.checker_command = str(value)
2123
1237
2124
# CheckerRunning - property
1238
@dbus_service_property(_interface, signature="b",
2125
@dbus_service_property(_interface,
2126
signature="b",
1239
2127
access="readwrite")
1240
2128
def CheckerRunning_dbus_property(self, value=None):
1241
2129
if value is None: # get
1244
2132
self.start_checker()
1245
2133
else:
1246
2134
self.stop_checker()
1247
2135
1248
2136
# ObjectPath - property
2137
@dbus_annotations(
2138
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2139
"org.freedesktop.DBus.Deprecated": "true"})
1249
2140
@dbus_service_property(_interface, signature="o", access="read")
1250
2141
def ObjectPath_dbus_property(self):
1251
return self.dbus_object_path # is already a dbus.ObjectPath
1252
2142
return self.dbus_object_path # is already a dbus.ObjectPath
2143
1253
2144
# Secret = property
1254
@dbus_service_property(_interface, signature="ay",
1255
access="write", byte_arrays=True)
2145
@dbus_annotations(
2146
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2147
"invalidates"})
2148
@dbus_service_property(_interface,
2149
signature="ay",
2150
access="write",
2151
byte_arrays=True)
1256
2152
def Secret_dbus_property(self, value):
1257
self.secret = str(value)
1258
2153
self.secret = bytes(value)
2154
1259
2155
del _interface
1260
2156
1261
2157
1264
2160
self._pipe = child_pipe
1265
2161
self._pipe.send(('init', fpr, address))
1266
2162
if not self._pipe.recv():
1267
raise KeyError()
1268
2163
raise KeyError(fpr)
2164
1269
2165
def __getattribute__(self, name):
1270
if(name == '_pipe'):
2166
if name == '_pipe':
1271
2167
return super(ProxyClient, self).__getattribute__(name)
1272
2168
self._pipe.send(('getattr', name))
1273
2169
data = self._pipe.recv()
1274
2170
if data[0] == 'data':
1275
2171
return data[1]
1276
2172
if data[0] == 'function':
2173
1277
2174
def func(*args, **kwargs):
1278
2175
self._pipe.send(('funcall', name, args, kwargs))
1279
2176
return self._pipe.recv()[1]
2177
1280
2178
return func
1281
2179
1282
2180
def __setattr__(self, name, value):
1283
if(name == '_pipe'):
2181
if name == '_pipe':
1284
2182
return super(ProxyClient, self).__setattr__(name, value)
1285
2183
self._pipe.send(('setattr', name, value))
1286
2184
1287
class ClientDBusTransitional(ClientDBus):
1288
__metaclass__ = AlternateDBusNamesMetaclass
1289
2185
1290
2186
class ClientHandler(socketserver.BaseRequestHandler, object):
1291
2187
"""A class to handle client connections.
1292
2188
1293
2189
Instantiated once for each connection to handle it.
1294
2190
Note: This will run in its own forked process."""
1295
2191
1296
2192
def handle(self):
1297
2193
with contextlib.closing(self.server.child_pipe) as child_pipe:
1298
2194
logger.info("TCP connection from: %s",
1299
unicode(self.client_address))
2195
str(self.client_address))
1300
2196
logger.debug("Pipe FD: %d",
1301
2197
self.server.child_pipe.fileno())
1302
1303
session = (gnutls.connection
1304
.ClientSession(self.request,
1305
gnutls.connection
1306
.X509Credentials()))
1307
1308
# Note: gnutls.connection.X509Credentials is really a
1309
# generic GnuTLS certificate credentials object so long as
1310
# no X.509 keys are added to it. Therefore, we can use it
1311
# here despite using OpenPGP certificates.
1312
1313
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1314
# "+AES-256-CBC", "+SHA1",
1315
# "+COMP-NULL", "+CTYPE-OPENPGP",
1316
# "+DHE-DSS"))
2198
2199
session = gnutls.ClientSession(self.request)
2200
2201
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2202
# "+AES-256-CBC", "+SHA1",
2203
# "+COMP-NULL", "+CTYPE-OPENPGP",
2204
# "+DHE-DSS"))
1317
2205
# Use a fallback default, since this MUST be set.
1318
2206
priority = self.server.gnutls_priority
1319
2207
if priority is None:
1320
2208
priority = "NORMAL"
1321
(gnutls.library.functions
1322
.gnutls_priority_set_direct(session._c_object,
1323
priority, None))
1324
2209
gnutls.priority_set_direct(session._c_object,
2210
priority.encode("utf-8"),
2211
None)
2212
1325
2213
# Start communication using the Mandos protocol
1326
2214
# Get protocol number
1327
2215
line = self.request.makefile().readline()
1328
2216
logger.debug("Protocol version: %r", line)
1329
2217
try:
1330
2218
if int(line.strip().split()[0]) > 1:
1331
raise RuntimeError
2219
raise RuntimeError(line)
1332
2220
except (ValueError, IndexError, RuntimeError) as error:
1333
2221
logger.error("Unknown protocol version: %s", error)
1334
2222
return
1335
2223
1336
2224
# Start GnuTLS connection
1337
2225
try:
1338
2226
session.handshake()
1339
except gnutls.errors.GNUTLSError as error:
2227
except gnutls.Error as error:
1340
2228
logger.warning("Handshake failed: %s", error)
1341
2229
# Do not run session.bye() here: the session is not
1342
2230
# established. Just abandon the request.
1343
2231
return
1344
2232
logger.debug("Handshake succeeded")
1345
2233
1346
2234
approval_required = False
1347
2235
try:
1348
2236
try:
1349
fpr = self.fingerprint(self.peer_certificate
1350
(session))
1351
except (TypeError,
1352
gnutls.errors.GNUTLSError) as error:
2237
fpr = self.fingerprint(
2238
self.peer_certificate(session))
2239
except (TypeError, gnutls.Error) as error:
1353
2240
logger.warning("Bad certificate: %s", error)
1354
2241
return
1355
2242
logger.debug("Fingerprint: %s", fpr)
1356
2243
1357
2244
try:
1358
2245
client = ProxyClient(child_pipe, fpr,
1359
2246
self.client_address)
1360
2247
except KeyError:
1361
2248
return
1362
2249
1363
2250
if client.approval_delay:
1364
2251
delay = client.approval_delay
1365
2252
client.approvals_pending += 1
1366
2253
approval_required = True
1367
2254
1368
2255
while True:
1369
2256
if not client.enabled:
1370
2257
logger.info("Client %s is disabled",
1371
client.name)
2258
client.name)
1372
2259
if self.server.use_dbus:
1373
2260
# Emit D-Bus signal
1374
2261
client.Rejected("Disabled")
1375
2262
return
1376
1377
if client._approved or not client.approval_delay:
1378
#We are approved or approval is disabled
2263
2264
if client.approved or not client.approval_delay:
2265
# We are approved or approval is disabled
1379
2266
break
1380
elif client._approved is None:
2267
elif client.approved is None:
1381
2268
logger.info("Client %s needs approval",
1382
2269
client.name)
1383
2270
if self.server.use_dbus:
1384
2271
# Emit D-Bus signal
1385
2272
client.NeedApproval(
1386
client.approval_delay_milliseconds(),
1387
client.approved_by_default)
2273
client.approval_delay.total_seconds()
2274
* 1000, client.approved_by_default)
1388
2275
else:
1389
2276
logger.warning("Client %s was not approved",
1390
2277
client.name)
1392
2279
# Emit D-Bus signal
1393
2280
client.Rejected("Denied")
1394
2281
return
1395
1396
#wait until timeout or approved
2282
2283
# wait until timeout or approved
1397
2284
time = datetime.datetime.now()
1398
2285
client.changedstate.acquire()
1399
(client.changedstate.wait
1400
(float(client._timedelta_to_milliseconds(delay)
1401
/ 1000)))
2286
client.changedstate.wait(delay.total_seconds())
1402
2287
client.changedstate.release()
1403
2288
time2 = datetime.datetime.now()
1404
2289
if (time2 - time) >= delay:
1414
2299
break
1415
2300
else:
1416
2301
delay -= time2 - time
1417
1418
sent_size = 0
1419
while sent_size < len(client.secret):
1420
try:
1421
sent = session.send(client.secret[sent_size:])
1422
except gnutls.errors.GNUTLSError as error:
1423
logger.warning("gnutls send failed")
1424
return
1425
logger.debug("Sent: %d, remaining: %d",
1426
sent, len(client.secret)
1427
- (sent_size + sent))
1428
sent_size += sent
1429
2302
2303
try:
2304
session.send(client.secret)
2305
except gnutls.Error as error:
2306
logger.warning("gnutls send failed",
2307
exc_info=error)
2308
return
2309
1430
2310
logger.info("Sending secret to %s", client.name)
1431
# bump the timeout as if seen
1432
client.checked_ok(client.extended_timeout)
2311
# bump the timeout using extended_timeout
2312
client.bump_timeout(client.extended_timeout)
1433
2313
if self.server.use_dbus:
1434
2314
# Emit D-Bus signal
1435
2315
client.GotSecret()
1436
2316
1437
2317
finally:
1438
2318
if approval_required:
1439
2319
client.approvals_pending -= 1
1440
2320
try:
1441
2321
session.bye()
1442
except gnutls.errors.GNUTLSError as error:
1443
logger.warning("GnuTLS bye failed")
1444
2322
except gnutls.Error as error:
2323
logger.warning("GnuTLS bye failed",
2324
exc_info=error)
2325
1445
2326
@staticmethod
1446
2327
def peer_certificate(session):
1447
2328
"Return the peer's OpenPGP certificate as a bytestring"
1448
2329
# If not an OpenPGP certificate...
1449
if (gnutls.library.functions
1450
.gnutls_certificate_type_get(session._c_object)
1451
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1452
# ...do the normal thing
1453
return session.peer_certificate
2330
if (gnutls.certificate_type_get(session._c_object)
2331
!= gnutls.CRT_OPENPGP):
2332
# ...return invalid data
2333
return b""
1454
2334
list_size = ctypes.c_uint(1)
1455
cert_list = (gnutls.library.functions
1456
.gnutls_certificate_get_peers
2335
cert_list = (gnutls.certificate_get_peers
1457
2336
(session._c_object, ctypes.byref(list_size)))
1458
2337
if not bool(cert_list) and list_size.value != 0:
1459
raise gnutls.errors.GNUTLSError("error getting peer"
1460
" certificate")
2338
raise gnutls.Error("error getting peer certificate")
1461
2339
if list_size.value == 0:
1462
2340
return None
1463
2341
cert = cert_list[0]
1464
2342
return ctypes.string_at(cert.data, cert.size)
1465
2343
1466
2344
@staticmethod
1467
2345
def fingerprint(openpgp):
1468
2346
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1469
2347
# New GnuTLS "datum" with the OpenPGP public key
1470
datum = (gnutls.library.types
1471
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1472
ctypes.POINTER
1473
(ctypes.c_ubyte)),
1474
ctypes.c_uint(len(openpgp))))
2348
datum = gnutls.datum_t(
2349
ctypes.cast(ctypes.c_char_p(openpgp),
2350
ctypes.POINTER(ctypes.c_ubyte)),
2351
ctypes.c_uint(len(openpgp)))
1475
2352
# New empty GnuTLS certificate
1476
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1477
(gnutls.library.functions
1478
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2353
crt = gnutls.openpgp_crt_t()
2354
gnutls.openpgp_crt_init(ctypes.byref(crt))
1479
2355
# Import the OpenPGP public key into the certificate
1480
(gnutls.library.functions
1481
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1482
gnutls.library.constants
1483
.GNUTLS_OPENPGP_FMT_RAW))
2356
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2357
gnutls.OPENPGP_FMT_RAW)
1484
2358
# Verify the self signature in the key
1485
2359
crtverify = ctypes.c_uint()
1486
(gnutls.library.functions
1487
.gnutls_openpgp_crt_verify_self(crt, 0,
1488
ctypes.byref(crtverify)))
2360
gnutls.openpgp_crt_verify_self(crt, 0,
2361
ctypes.byref(crtverify))
1489
2362
if crtverify.value != 0:
1490
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1491
raise (gnutls.errors.CertificateSecurityError
1492
("Verify failed"))
2363
gnutls.openpgp_crt_deinit(crt)
2364
raise gnutls.CertificateSecurityError("Verify failed")
1493
2365
# New buffer for the fingerprint
1494
2366
buf = ctypes.create_string_buffer(20)
1495
2367
buf_len = ctypes.c_size_t()
1496
2368
# Get the fingerprint from the certificate into the buffer
1497
(gnutls.library.functions
1498
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1499
ctypes.byref(buf_len)))
2369
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2370
ctypes.byref(buf_len))
1500
2371
# Deinit the certificate
1501
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2372
gnutls.openpgp_crt_deinit(crt)
1502
2373
# Convert the buffer to a Python bytestring
1503
2374
fpr = ctypes.string_at(buf, buf_len.value)
1504
2375
# Convert the bytestring to hexadecimal notation
1505
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2376
hex_fpr = binascii.hexlify(fpr).upper()
1506
2377
return hex_fpr
1507
2378
1508
2379
1509
2380
class MultiprocessingMixIn(object):
1510
2381
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2382
1511
2383
def sub_process_main(self, request, address):
1512
2384
try:
1513
2385
self.finish_request(request, address)
1514
except:
2386
except Exception:
1515
2387
self.handle_error(request, address)
1516
2388
self.close_request(request)
1517
2389
1518
2390
def process_request(self, request, address):
1519
2391
"""Start a new process to process the request."""
1520
proc = multiprocessing.Process(target = self.sub_process_main,
1521
args = (request,
1522
address))
2392
proc = multiprocessing.Process(target=self.sub_process_main,
2393
args=(request, address))
1523
2394
proc.start()
1524
2395
return proc
1525
2396
1526
2397
1527
2398
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1528
2399
""" adds a pipe to the MixIn """
2400
1529
2401
def process_request(self, request, client_address):
1530
2402
"""Overrides and wraps the original process_request().
1531
2403
1532
2404
This function creates a new pipe in self.pipe
1533
2405
"""
1534
2406
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1535
2407
1536
2408
proc = MultiprocessingMixIn.process_request(self, request,
1537
2409
client_address)
1538
2410
self.child_pipe.close()
1539
2411
self.add_pipe(parent_pipe, proc)
1540
2412
1541
2413
def add_pipe(self, parent_pipe, proc):
1542
2414
"""Dummy function; override as necessary"""
1543
raise NotImplementedError
2415
raise NotImplementedError()
1544
2416
1545
2417
1546
2418
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1547
2419
socketserver.TCPServer, object):
1548
2420
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1549
2421
1550
2422
Attributes:
1551
2423
enabled: Boolean; whether this server is activated yet
1552
2424
interface: None or a network interface name (string)
1553
2425
use_ipv6: Boolean; to use IPv6 or not
1554
2426
"""
2427
1555
2428
def __init__(self, server_address, RequestHandlerClass,
1556
interface=None, use_ipv6=True):
2429
interface=None,
2430
use_ipv6=True,
2431
socketfd=None):
2432
"""If socketfd is set, use that file descriptor instead of
2433
creating a new one with socket.socket().
2434
"""
1557
2435
self.interface = interface
1558
2436
if use_ipv6:
1559
2437
self.address_family = socket.AF_INET6
2438
if socketfd is not None:
2439
# Save the file descriptor
2440
self.socketfd = socketfd
2441
# Save the original socket.socket() function
2442
self.socket_socket = socket.socket
2443
2444
# To implement --socket, we monkey patch socket.socket.
2445
#
2446
# (When socketserver.TCPServer is a new-style class, we
2447
# could make self.socket into a property instead of monkey
2448
# patching socket.socket.)
2449
#
2450
# Create a one-time-only replacement for socket.socket()
2451
@functools.wraps(socket.socket)
2452
def socket_wrapper(*args, **kwargs):
2453
# Restore original function so subsequent calls are
2454
# not affected.
2455
socket.socket = self.socket_socket
2456
del self.socket_socket
2457
# This time only, return a new socket object from the
2458
# saved file descriptor.
2459
return socket.fromfd(self.socketfd, *args, **kwargs)
2460
# Replace socket.socket() function with wrapper
2461
socket.socket = socket_wrapper
2462
# The socketserver.TCPServer.__init__ will call
2463
# socket.socket(), which might be our replacement,
2464
# socket_wrapper(), if socketfd was set.
1560
2465
socketserver.TCPServer.__init__(self, server_address,
1561
2466
RequestHandlerClass)
2467
1562
2468
def server_bind(self):
1563
2469
"""This overrides the normal server_bind() function
1564
2470
to bind to an interface if one was specified, and also NOT to
1565
2471
bind to an address or port if they were not specified."""
2472
global SO_BINDTODEVICE
1566
2473
if self.interface is not None:
1567
2474
if SO_BINDTODEVICE is None:
1568
logger.error("SO_BINDTODEVICE does not exist;"
1569
" cannot bind to interface %s",
1570
self.interface)
1571
else:
1572
try:
1573
self.socket.setsockopt(socket.SOL_SOCKET,
1574
SO_BINDTODEVICE,
1575
str(self.interface
1576
+ '\0'))
1577
except socket.error as error:
1578
if error[0] == errno.EPERM:
1579
logger.error("No permission to"
1580
" bind to interface %s",
1581
self.interface)
1582
elif error[0] == errno.ENOPROTOOPT:
1583
logger.error("SO_BINDTODEVICE not available;"
1584
" cannot bind to interface %s",
1585
self.interface)
1586
else:
1587
raise
2475
# Fall back to a hard-coded value which seems to be
2476
# common enough.
2477
logger.warning("SO_BINDTODEVICE not found, trying 25")
2478
SO_BINDTODEVICE = 25
2479
try:
2480
self.socket.setsockopt(
2481
socket.SOL_SOCKET, SO_BINDTODEVICE,
2482
(self.interface + "\0").encode("utf-8"))
2483
except socket.error as error:
2484
if error.errno == errno.EPERM:
2485
logger.error("No permission to bind to"
2486
" interface %s", self.interface)
2487
elif error.errno == errno.ENOPROTOOPT:
2488
logger.error("SO_BINDTODEVICE not available;"
2489
" cannot bind to interface %s",
2490
self.interface)
2491
elif error.errno == errno.ENODEV:
2492
logger.error("Interface %s does not exist,"
2493
" cannot bind", self.interface)
2494
else:
2495
raise
1588
2496
# Only bind(2) the socket if we really need to.
1589
2497
if self.server_address[0] or self.server_address[1]:
1590
2498
if not self.server_address[0]:
1591
2499
if self.address_family == socket.AF_INET6:
1592
any_address = "::" # in6addr_any
2500
any_address = "::" # in6addr_any
1593
2501
else:
1594
any_address = socket.INADDR_ANY
2502
any_address = "0.0.0.0" # INADDR_ANY
1595
2503
self.server_address = (any_address,
1596
2504
self.server_address[1])
1597
2505
elif not self.server_address[1]:
1598
self.server_address = (self.server_address[0],
1599
0)
2506
self.server_address = (self.server_address[0], 0)
1600
2507
# if self.interface:
1601
2508
# self.server_address = (self.server_address[0],
1602
2509
# 0, # port
1608
2515
1609
2516
class MandosServer(IPv6_TCPServer):
1610
2517
"""Mandos server.
1611
2518
1612
2519
Attributes:
1613
2520
clients: set of Client objects
1614
2521
gnutls_priority GnuTLS priority string
1615
2522
use_dbus: Boolean; to emit D-Bus signals or not
1616
1617
Assumes a gobject.MainLoop event loop.
2523
2524
Assumes a GLib.MainLoop event loop.
1618
2525
"""
2526
1619
2527
def __init__(self, server_address, RequestHandlerClass,
1620
interface=None, use_ipv6=True, clients=None,
1621
gnutls_priority=None, use_dbus=True):
2528
interface=None,
2529
use_ipv6=True,
2530
clients=None,
2531
gnutls_priority=None,
2532
use_dbus=True,
2533
socketfd=None):
1622
2534
self.enabled = False
1623
2535
self.clients = clients
1624
2536
if self.clients is None:
1625
self.clients = set()
2537
self.clients = {}
1626
2538
self.use_dbus = use_dbus
1627
2539
self.gnutls_priority = gnutls_priority
1628
2540
IPv6_TCPServer.__init__(self, server_address,
1629
2541
RequestHandlerClass,
1630
interface = interface,
1631
use_ipv6 = use_ipv6)
2542
interface=interface,
2543
use_ipv6=use_ipv6,
2544
socketfd=socketfd)
2545
1632
2546
def server_activate(self):
1633
2547
if self.enabled:
1634
2548
return socketserver.TCPServer.server_activate(self)
1635
2549
1636
2550
def enable(self):
1637
2551
self.enabled = True
1638
2552
1639
2553
def add_pipe(self, parent_pipe, proc):
1640
2554
# Call "handle_ipc" for both data and EOF events
1641
gobject.io_add_watch(parent_pipe.fileno(),
1642
gobject.IO_IN | gobject.IO_HUP,
1643
functools.partial(self.handle_ipc,
1644
parent_pipe =
1645
parent_pipe,
1646
proc = proc))
1647
1648
def handle_ipc(self, source, condition, parent_pipe=None,
1649
proc = None, client_object=None):
1650
condition_names = {
1651
gobject.IO_IN: "IN", # There is data to read.
1652
gobject.IO_OUT: "OUT", # Data can be written (without
1653
# blocking).
1654
gobject.IO_PRI: "PRI", # There is urgent data to read.
1655
gobject.IO_ERR: "ERR", # Error condition.
1656
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1657
# broken, usually for pipes and
1658
# sockets).
1659
}
1660
conditions_string = ' | '.join(name
1661
for cond, name in
1662
condition_names.iteritems()
1663
if cond & condition)
1664
# error or the other end of multiprocessing.Pipe has closed
1665
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2555
GLib.io_add_watch(
2556
parent_pipe.fileno(),
2557
GLib.IO_IN | GLib.IO_HUP,
2558
functools.partial(self.handle_ipc,
2559
parent_pipe=parent_pipe,
2560
proc=proc))
2561
2562
def handle_ipc(self, source, condition,
2563
parent_pipe=None,
2564
proc=None,
2565
client_object=None):
2566
# error, or the other end of multiprocessing.Pipe has closed
2567
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2568
# Wait for other process to exit
1666
2569
proc.join()
1667
2570
return False
1668
2571
1669
2572
# Read a request from the child
1670
2573
request = parent_pipe.recv()
1671
2574
command = request[0]
1672
2575
1673
2576
if command == 'init':
1674
2577
fpr = request[1]
1675
2578
address = request[2]
1676
1677
for c in self.clients:
2579
2580
for c in self.clients.values():
1678
2581
if c.fingerprint == fpr:
1679
2582
client = c
1680
2583
break
1687
2590
address[0])
1688
2591
parent_pipe.send(False)
1689
2592
return False
1690
1691
gobject.io_add_watch(parent_pipe.fileno(),
1692
gobject.IO_IN | gobject.IO_HUP,
1693
functools.partial(self.handle_ipc,
1694
parent_pipe =
1695
parent_pipe,
1696
proc = proc,
1697
client_object =
1698
client))
2593
2594
GLib.io_add_watch(
2595
parent_pipe.fileno(),
2596
GLib.IO_IN | GLib.IO_HUP,
2597
functools.partial(self.handle_ipc,
2598
parent_pipe=parent_pipe,
2599
proc=proc,
2600
client_object=client))
1699
2601
parent_pipe.send(True)
1700
2602
# remove the old hook in favor of the new above hook on
1701
2603
# same fileno
1704
2606
funcname = request[1]
1705
2607
args = request[2]
1706
2608
kwargs = request[3]
1707
2609
1708
2610
parent_pipe.send(('data', getattr(client_object,
1709
2611
funcname)(*args,
1710
**kwargs)))
1711
2612
**kwargs)))
2613
1712
2614
if command == 'getattr':
1713
2615
attrname = request[1]
1714
if callable(client_object.__getattribute__(attrname)):
1715
parent_pipe.send(('function',))
2616
if isinstance(client_object.__getattribute__(attrname),
2617
collections.Callable):
2618
parent_pipe.send(('function', ))
1716
2619
else:
1717
parent_pipe.send(('data', client_object
1718
.__getattribute__(attrname)))
1719
2620
parent_pipe.send((
2621
'data', client_object.__getattribute__(attrname)))
2622
1720
2623
if command == 'setattr':
1721
2624
attrname = request[1]
1722
2625
value = request[2]
1723
2626
setattr(client_object, attrname, value)
1724
2627
1725
2628
return True
1726
2629
1727
2630
2631
def rfc3339_duration_to_delta(duration):
2632
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2633
2634
>>> rfc3339_duration_to_delta("P7D")
2635
datetime.timedelta(7)
2636
>>> rfc3339_duration_to_delta("PT60S")
2637
datetime.timedelta(0, 60)
2638
>>> rfc3339_duration_to_delta("PT60M")
2639
datetime.timedelta(0, 3600)
2640
>>> rfc3339_duration_to_delta("PT24H")
2641
datetime.timedelta(1)
2642
>>> rfc3339_duration_to_delta("P1W")
2643
datetime.timedelta(7)
2644
>>> rfc3339_duration_to_delta("PT5M30S")
2645
datetime.timedelta(0, 330)
2646
>>> rfc3339_duration_to_delta("P1DT3M20S")
2647
datetime.timedelta(1, 200)
2648
"""
2649
2650
# Parsing an RFC 3339 duration with regular expressions is not
2651
# possible - there would have to be multiple places for the same
2652
# values, like seconds. The current code, while more esoteric, is
2653
# cleaner without depending on a parsing library. If Python had a
2654
# built-in library for parsing we would use it, but we'd like to
2655
# avoid excessive use of external libraries.
2656
2657
# New type for defining tokens, syntax, and semantics all-in-one
2658
Token = collections.namedtuple("Token", (
2659
"regexp", # To match token; if "value" is not None, must have
2660
# a "group" containing digits
2661
"value", # datetime.timedelta or None
2662
"followers")) # Tokens valid after this token
2663
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2664
# the "duration" ABNF definition in RFC 3339, Appendix A.
2665
token_end = Token(re.compile(r"$"), None, frozenset())
2666
token_second = Token(re.compile(r"(\d+)S"),
2667
datetime.timedelta(seconds=1),
2668
frozenset((token_end, )))
2669
token_minute = Token(re.compile(r"(\d+)M"),
2670
datetime.timedelta(minutes=1),
2671
frozenset((token_second, token_end)))
2672
token_hour = Token(re.compile(r"(\d+)H"),
2673
datetime.timedelta(hours=1),
2674
frozenset((token_minute, token_end)))
2675
token_time = Token(re.compile(r"T"),
2676
None,
2677
frozenset((token_hour, token_minute,
2678
token_second)))
2679
token_day = Token(re.compile(r"(\d+)D"),
2680
datetime.timedelta(days=1),
2681
frozenset((token_time, token_end)))
2682
token_month = Token(re.compile(r"(\d+)M"),
2683
datetime.timedelta(weeks=4),
2684
frozenset((token_day, token_end)))
2685
token_year = Token(re.compile(r"(\d+)Y"),
2686
datetime.timedelta(weeks=52),
2687
frozenset((token_month, token_end)))
2688
token_week = Token(re.compile(r"(\d+)W"),
2689
datetime.timedelta(weeks=1),
2690
frozenset((token_end, )))
2691
token_duration = Token(re.compile(r"P"), None,
2692
frozenset((token_year, token_month,
2693
token_day, token_time,
2694
token_week)))
2695
# Define starting values:
2696
# Value so far
2697
value = datetime.timedelta()
2698
found_token = None
2699
# Following valid tokens
2700
followers = frozenset((token_duration, ))
2701
# String left to parse
2702
s = duration
2703
# Loop until end token is found
2704
while found_token is not token_end:
2705
# Search for any currently valid tokens
2706
for token in followers:
2707
match = token.regexp.match(s)
2708
if match is not None:
2709
# Token found
2710
if token.value is not None:
2711
# Value found, parse digits
2712
factor = int(match.group(1), 10)
2713
# Add to value so far
2714
value += factor * token.value
2715
# Strip token from string
2716
s = token.regexp.sub("", s, 1)
2717
# Go to found token
2718
found_token = token
2719
# Set valid next tokens
2720
followers = found_token.followers
2721
break
2722
else:
2723
# No currently valid tokens were found
2724
raise ValueError("Invalid RFC 3339 duration: {!r}"
2725
.format(duration))
2726
# End token found
2727
return value
2728
2729
1728
2730
def string_to_delta(interval):
1729
2731
"""Parse a string and return a datetime.timedelta
1730
2732
1731
2733
>>> string_to_delta('7d')
1732
2734
datetime.timedelta(7)
1733
2735
>>> string_to_delta('60s')
1741
2743
>>> string_to_delta('5m 30s')
1742
2744
datetime.timedelta(0, 330)
1743
2745
"""
2746
2747
try:
2748
return rfc3339_duration_to_delta(interval)
2749
except ValueError:
2750
pass
2751
1744
2752
timevalue = datetime.timedelta(0)
1745
2753
for s in interval.split():
1746
2754
try:
1747
suffix = unicode(s[-1])
2755
suffix = s[-1]
1748
2756
value = int(s[:-1])
1749
2757
if suffix == "d":
1750
2758
delta = datetime.timedelta(value)
1757
2765
elif suffix == "w":
1758
2766
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1759
2767
else:
1760
raise ValueError("Unknown suffix %r" % suffix)
1761
except (ValueError, IndexError) as e:
2768
raise ValueError("Unknown suffix {!r}".format(suffix))
2769
except IndexError as e:
1762
2770
raise ValueError(*(e.args))
1763
2771
timevalue += delta
1764
2772
return timevalue
1765
2773
1766
2774
1767
def if_nametoindex(interface):
1768
"""Call the C function if_nametoindex(), or equivalent
1769
1770
Note: This function cannot accept a unicode string."""
1771
global if_nametoindex
1772
try:
1773
if_nametoindex = (ctypes.cdll.LoadLibrary
1774
(ctypes.util.find_library("c"))
1775
.if_nametoindex)
1776
except (OSError, AttributeError):
1777
logger.warning("Doing if_nametoindex the hard way")
1778
def if_nametoindex(interface):
1779
"Get an interface index the hard way, i.e. using fcntl()"
1780
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1781
with contextlib.closing(socket.socket()) as s:
1782
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1783
struct.pack(str("16s16x"),
1784
interface))
1785
interface_index = struct.unpack(str("I"),
1786
ifreq[16:20])[0]
1787
return interface_index
1788
return if_nametoindex(interface)
1789
1790
1791
def daemon(nochdir = False, noclose = False):
2775
def daemon(nochdir=False, noclose=False):
1792
2776
"""See daemon(3). Standard BSD Unix function.
1793
2777
1794
2778
This should really exist as os.daemon, but it doesn't (yet)."""
1795
2779
if os.fork():
1796
2780
sys.exit()
1801
2785
sys.exit()
1802
2786
if not noclose:
1803
2787
# Close all standard open file descriptors
1804
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2788
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1805
2789
if not stat.S_ISCHR(os.fstat(null).st_mode):
1806
2790
raise OSError(errno.ENODEV,
1807
"%s not a character device"
1808
% os.path.devnull)
2791
"{} not a character device"
2792
.format(os.devnull))
1809
2793
os.dup2(null, sys.stdin.fileno())
1810
2794
os.dup2(null, sys.stdout.fileno())
1811
2795
os.dup2(null, sys.stderr.fileno())
1814
2798
1815
2799
1816
2800
def main():
1817
2801
1818
2802
##################################################################
1819
2803
# Parsing of options, both command line and config file
1820
2804
1821
2805
parser = argparse.ArgumentParser()
1822
2806
parser.add_argument("-v", "--version", action="version",
1823
version = "%%(prog)s %s" % version,
2807
version="%(prog)s {}".format(version),
1824
2808
help="show version number and exit")
1825
2809
parser.add_argument("-i", "--interface", metavar="IF",
1826
2810
help="Bind to interface IF")
1832
2816
help="Run self-test")
1833
2817
parser.add_argument("--debug", action="store_true",
1834
2818
help="Debug mode; run in foreground and log"
1835
" to terminal")
2819
" to terminal", default=None)
1836
2820
parser.add_argument("--debuglevel", metavar="LEVEL",
1837
2821
help="Debug level for stdout output")
1838
2822
parser.add_argument("--priority", help="GnuTLS"
1845
2829
" files")
1846
2830
parser.add_argument("--no-dbus", action="store_false",
1847
2831
dest="use_dbus", help="Do not provide D-Bus"
1848
" system bus interface")
2832
" system bus interface", default=None)
1849
2833
parser.add_argument("--no-ipv6", action="store_false",
1850
dest="use_ipv6", help="Do not use IPv6")
2834
dest="use_ipv6", help="Do not use IPv6",
2835
default=None)
2836
parser.add_argument("--no-restore", action="store_false",
2837
dest="restore", help="Do not restore stored"
2838
" state", default=None)
2839
parser.add_argument("--socket", type=int,
2840
help="Specify a file descriptor to a network"
2841
" socket to use instead of creating one")
2842
parser.add_argument("--statedir", metavar="DIR",
2843
help="Directory to save/restore state in")
2844
parser.add_argument("--foreground", action="store_true",
2845
help="Run in foreground", default=None)
2846
parser.add_argument("--no-zeroconf", action="store_false",
2847
dest="zeroconf", help="Do not use Zeroconf",
2848
default=None)
2849
1851
2850
options = parser.parse_args()
1852
2851
1853
2852
if options.check:
1854
2853
import doctest
1855
doctest.testmod()
1856
sys.exit()
1857
2854
fail_count, test_count = doctest.testmod()
2855
sys.exit(os.EX_OK if fail_count == 0 else 1)
2856
1858
2857
# Default values for config file for server-global settings
1859
server_defaults = { "interface": "",
1860
"address": "",
1861
"port": "",
1862
"debug": "False",
1863
"priority":
1864
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1865
"servicename": "Mandos",
1866
"use_dbus": "True",
1867
"use_ipv6": "True",
1868
"debuglevel": "",
1869
}
1870
2858
server_defaults = {"interface": "",
2859
"address": "",
2860
"port": "",
2861
"debug": "False",
2862
"priority":
2863
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2864
":+SIGN-DSA-SHA256",
2865
"servicename": "Mandos",
2866
"use_dbus": "True",
2867
"use_ipv6": "True",
2868
"debuglevel": "",
2869
"restore": "True",
2870
"socket": "",
2871
"statedir": "/var/lib/mandos",
2872
"foreground": "False",
2873
"zeroconf": "True",
2874
}
2875
1871
2876
# Parse config file for server-global settings
1872
2877
server_config = configparser.SafeConfigParser(server_defaults)
1873
2878
del server_defaults
1874
server_config.read(os.path.join(options.configdir,
1875
"mandos.conf"))
2879
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1876
2880
# Convert the SafeConfigParser object to a dict
1877
2881
server_settings = server_config.defaults()
1878
2882
# Use the appropriate methods on the non-string config options
1879
for option in ("debug", "use_dbus", "use_ipv6"):
2883
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1880
2884
server_settings[option] = server_config.getboolean("DEFAULT",
1881
2885
option)
1882
2886
if server_settings["port"]:
1883
2887
server_settings["port"] = server_config.getint("DEFAULT",
1884
2888
"port")
2889
if server_settings["socket"]:
2890
server_settings["socket"] = server_config.getint("DEFAULT",
2891
"socket")
2892
# Later, stdin will, and stdout and stderr might, be dup'ed
2893
# over with an opened os.devnull. But we don't want this to
2894
# happen with a supplied network socket.
2895
if 0 <= server_settings["socket"] <= 2:
2896
server_settings["socket"] = os.dup(server_settings
2897
["socket"])
1885
2898
del server_config
1886
2899
1887
2900
# Override the settings from the config file with command line
1888
2901
# options, if set.
1889
2902
for option in ("interface", "address", "port", "debug",
1890
"priority", "servicename", "configdir",
1891
"use_dbus", "use_ipv6", "debuglevel"):
2903
"priority", "servicename", "configdir", "use_dbus",
2904
"use_ipv6", "debuglevel", "restore", "statedir",
2905
"socket", "foreground", "zeroconf"):
1892
2906
value = getattr(options, option)
1893
2907
if value is not None:
1894
2908
server_settings[option] = value
1895
2909
del options
1896
2910
# Force all strings to be unicode
1897
2911
for option in server_settings.keys():
1898
if type(server_settings[option]) is str:
1899
server_settings[option] = unicode(server_settings[option])
2912
if isinstance(server_settings[option], bytes):
2913
server_settings[option] = (server_settings[option]
2914
.decode("utf-8"))
2915
# Force all boolean options to be boolean
2916
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2917
"foreground", "zeroconf"):
2918
server_settings[option] = bool(server_settings[option])
2919
# Debug implies foreground
2920
if server_settings["debug"]:
2921
server_settings["foreground"] = True
1900
2922
# Now we have our good server settings in "server_settings"
1901
2923
1902
2924
##################################################################
1903
2925
2926
if (not server_settings["zeroconf"]
2927
and not (server_settings["port"]
2928
or server_settings["socket"] != "")):
2929
parser.error("Needs port or socket to work without Zeroconf")
2930
1904
2931
# For convenience
1905
2932
debug = server_settings["debug"]
1906
2933
debuglevel = server_settings["debuglevel"]
1907
2934
use_dbus = server_settings["use_dbus"]
1908
2935
use_ipv6 = server_settings["use_ipv6"]
1909
2936
stored_state_path = os.path.join(server_settings["statedir"],
2937
stored_state_file)
2938
foreground = server_settings["foreground"]
2939
zeroconf = server_settings["zeroconf"]
2940
2941
if debug:
2942
initlogger(debug, logging.DEBUG)
2943
else:
2944
if not debuglevel:
2945
initlogger(debug)
2946
else:
2947
level = getattr(logging, debuglevel.upper())
2948
initlogger(debug, level)
2949
1910
2950
if server_settings["servicename"] != "Mandos":
1911
syslogger.setFormatter(logging.Formatter
1912
('Mandos (%s) [%%(process)d]:'
1913
' %%(levelname)s: %%(message)s'
1914
% server_settings["servicename"]))
1915
2951
syslogger.setFormatter(
2952
logging.Formatter('Mandos ({}) [%(process)d]:'
2953
' %(levelname)s: %(message)s'.format(
2954
server_settings["servicename"])))
2955
1916
2956
# Parse config file with clients
1917
client_defaults = { "timeout": "5m",
1918
"extended_timeout": "15m",
1919
"interval": "2m",
1920
"checker": "fping -q -- %%(host)s",
1921
"host": "",
1922
"approval_delay": "0s",
1923
"approval_duration": "1s",
1924
}
1925
client_config = configparser.SafeConfigParser(client_defaults)
2957
client_config = configparser.SafeConfigParser(Client
2958
.client_defaults)
1926
2959
client_config.read(os.path.join(server_settings["configdir"],
1927
2960
"clients.conf"))
1928
2961
1929
2962
global mandos_dbus_service
1930
2963
mandos_dbus_service = None
1931
1932
tcp_server = MandosServer((server_settings["address"],
1933
server_settings["port"]),
1934
ClientHandler,
1935
interface=(server_settings["interface"]
1936
or None),
1937
use_ipv6=use_ipv6,
1938
gnutls_priority=
1939
server_settings["priority"],
1940
use_dbus=use_dbus)
1941
if not debug:
1942
pidfilename = "/var/run/mandos.pid"
1943
try:
1944
pidfile = open(pidfilename, "w")
1945
except IOError:
1946
logger.error("Could not open file %r", pidfilename)
1947
1948
try:
1949
uid = pwd.getpwnam("_mandos").pw_uid
1950
gid = pwd.getpwnam("_mandos").pw_gid
1951
except KeyError:
1952
try:
1953
uid = pwd.getpwnam("mandos").pw_uid
1954
gid = pwd.getpwnam("mandos").pw_gid
2964
2965
socketfd = None
2966
if server_settings["socket"] != "":
2967
socketfd = server_settings["socket"]
2968
tcp_server = MandosServer(
2969
(server_settings["address"], server_settings["port"]),
2970
ClientHandler,
2971
interface=(server_settings["interface"] or None),
2972
use_ipv6=use_ipv6,
2973
gnutls_priority=server_settings["priority"],
2974
use_dbus=use_dbus,
2975
socketfd=socketfd)
2976
if not foreground:
2977
pidfilename = "/run/mandos.pid"
2978
if not os.path.isdir("/run/."):
2979
pidfilename = "/var/run/mandos.pid"
2980
pidfile = None
2981
try:
2982
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2983
except IOError as e:
2984
logger.error("Could not open file %r", pidfilename,
2985
exc_info=e)
2986
2987
for name, group in (("_mandos", "_mandos"),
2988
("mandos", "mandos"),
2989
("nobody", "nogroup")):
2990
try:
2991
uid = pwd.getpwnam(name).pw_uid
2992
gid = pwd.getpwnam(group).pw_gid
2993
break
1955
2994
except KeyError:
1956
try:
1957
uid = pwd.getpwnam("nobody").pw_uid
1958
gid = pwd.getpwnam("nobody").pw_gid
1959
except KeyError:
1960
uid = 65534
1961
gid = 65534
2995
continue
2996
else:
2997
uid = 65534
2998
gid = 65534
1962
2999
try:
1963
3000
os.setgid(gid)
1964
3001
os.setuid(uid)
3002
if debug:
3003
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3004
gid))
1965
3005
except OSError as error:
1966
if error[0] != errno.EPERM:
1967
raise error
1968
1969
if not debug and not debuglevel:
1970
syslogger.setLevel(logging.WARNING)
1971
console.setLevel(logging.WARNING)
1972
if debuglevel:
1973
level = getattr(logging, debuglevel.upper())
1974
syslogger.setLevel(level)
1975
console.setLevel(level)
1976
3006
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3007
.format(uid, gid, os.strerror(error.errno)))
3008
if error.errno != errno.EPERM:
3009
raise
3010
1977
3011
if debug:
1978
3012
# Enable all possible GnuTLS debugging
1979
3013
1980
3014
# "Use a log level over 10 to enable all debugging options."
1981
3015
# - GnuTLS manual
1982
gnutls.library.functions.gnutls_global_set_log_level(11)
1983
1984
@gnutls.library.types.gnutls_log_func
3016
gnutls.global_set_log_level(11)
3017
3018
@gnutls.log_func
1985
3019
def debug_gnutls(level, string):
1986
3020
logger.debug("GnuTLS: %s", string[:-1])
1987
1988
(gnutls.library.functions
1989
.gnutls_global_set_log_function(debug_gnutls))
1990
3021
3022
gnutls.global_set_log_function(debug_gnutls)
3023
1991
3024
# Redirect stdin so all checkers get /dev/null
1992
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3025
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1993
3026
os.dup2(null, sys.stdin.fileno())
1994
3027
if null > 2:
1995
3028
os.close(null)
1996
else:
1997
# No console logging
1998
logger.removeHandler(console)
1999
3029
2000
3030
# Need to fork before connecting to D-Bus
2001
if not debug:
3031
if not foreground:
2002
3032
# Close all input and output, do double fork, etc.
2003
3033
daemon()
2004
3034
3035
# multiprocessing will use threads, so before we use GLib we need
3036
# to inform GLib that threads will be used.
3037
GLib.threads_init()
3038
2005
3039
global main_loop
2006
3040
# From the Avahi example code
2007
DBusGMainLoop(set_as_default=True )
2008
main_loop = gobject.MainLoop()
3041
DBusGMainLoop(set_as_default=True)
3042
main_loop = GLib.MainLoop()
2009
3043
bus = dbus.SystemBus()
2010
3044
# End of Avahi example code
2011
3045
if use_dbus:
2012
3046
try:
2013
3047
bus_name = dbus.service.BusName("se.recompile.Mandos",
2014
bus, do_not_queue=True)
2015
old_bus_name = (dbus.service.BusName
2016
("se.bsnet.fukt.Mandos", bus,
2017
do_not_queue=True))
2018
except dbus.exceptions.NameExistsException as e:
2019
logger.error(unicode(e) + ", disabling D-Bus")
3048
bus,
3049
do_not_queue=True)
3050
old_bus_name = dbus.service.BusName(
3051
"se.bsnet.fukt.Mandos", bus,
3052
do_not_queue=True)
3053
except dbus.exceptions.DBusException as e:
3054
logger.error("Disabling D-Bus:", exc_info=e)
2020
3055
use_dbus = False
2021
3056
server_settings["use_dbus"] = False
2022
3057
tcp_server.use_dbus = False
2023
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2024
service = AvahiService(name = server_settings["servicename"],
2025
servicetype = "_mandos._tcp",
2026
protocol = protocol, bus = bus)
2027
if server_settings["interface"]:
2028
service.interface = (if_nametoindex
2029
(str(server_settings["interface"])))
2030
3058
if zeroconf:
3059
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3060
service = AvahiServiceToSyslog(
3061
name=server_settings["servicename"],
3062
servicetype="_mandos._tcp",
3063
protocol=protocol,
3064
bus=bus)
3065
if server_settings["interface"]:
3066
service.interface = if_nametoindex(
3067
server_settings["interface"].encode("utf-8"))
3068
2031
3069
global multiprocessing_manager
2032
3070
multiprocessing_manager = multiprocessing.Manager()
2033
3071
2034
3072
client_class = Client
2035
3073
if use_dbus:
2036
client_class = functools.partial(ClientDBusTransitional,
2037
bus = bus)
2038
def client_config_items(config, section):
2039
special_settings = {
2040
"approved_by_default":
2041
lambda: config.getboolean(section,
2042
"approved_by_default"),
2043
}
2044
for name, value in config.items(section):
3074
client_class = functools.partial(ClientDBus, bus=bus)
3075
3076
client_settings = Client.config_parser(client_config)
3077
old_client_settings = {}
3078
clients_data = {}
3079
3080
# This is used to redirect stdout and stderr for checker processes
3081
global wnull
3082
wnull = open(os.devnull, "w") # A writable /dev/null
3083
# Only used if server is running in foreground but not in debug
3084
# mode
3085
if debug or not foreground:
3086
wnull.close()
3087
3088
# Get client data and settings from last running state.
3089
if server_settings["restore"]:
3090
try:
3091
with open(stored_state_path, "rb") as stored_state:
3092
if sys.version_info.major == 2:
3093
clients_data, old_client_settings = pickle.load(
3094
stored_state)
3095
else:
3096
bytes_clients_data, bytes_old_client_settings = (
3097
pickle.load(stored_state, encoding="bytes"))
3098
# Fix bytes to strings
3099
# clients_data
3100
# .keys()
3101
clients_data = {(key.decode("utf-8")
3102
if isinstance(key, bytes)
3103
else key): value
3104
for key, value in
3105
bytes_clients_data.items()}
3106
del bytes_clients_data
3107
for key in clients_data:
3108
value = {(k.decode("utf-8")
3109
if isinstance(k, bytes) else k): v
3110
for k, v in
3111
clients_data[key].items()}
3112
clients_data[key] = value
3113
# .client_structure
3114
value["client_structure"] = [
3115
(s.decode("utf-8")
3116
if isinstance(s, bytes)
3117
else s) for s in
3118
value["client_structure"]]
3119
# .name & .host
3120
for k in ("name", "host"):
3121
if isinstance(value[k], bytes):
3122
value[k] = value[k].decode("utf-8")
3123
# old_client_settings
3124
# .keys()
3125
old_client_settings = {
3126
(key.decode("utf-8")
3127
if isinstance(key, bytes)
3128
else key): value
3129
for key, value in
3130
bytes_old_client_settings.items()}
3131
del bytes_old_client_settings
3132
# .host
3133
for value in old_client_settings.values():
3134
if isinstance(value["host"], bytes):
3135
value["host"] = (value["host"]
3136
.decode("utf-8"))
3137
os.remove(stored_state_path)
3138
except IOError as e:
3139
if e.errno == errno.ENOENT:
3140
logger.warning("Could not load persistent state:"
3141
" {}".format(os.strerror(e.errno)))
3142
else:
3143
logger.critical("Could not load persistent state:",
3144
exc_info=e)
3145
raise
3146
except EOFError as e:
3147
logger.warning("Could not load persistent state: "
3148
"EOFError:",
3149
exc_info=e)
3150
3151
with PGPEngine() as pgp:
3152
for client_name, client in clients_data.items():
3153
# Skip removed clients
3154
if client_name not in client_settings:
3155
continue
3156
3157
# Decide which value to use after restoring saved state.
3158
# We have three different values: Old config file,
3159
# new config file, and saved state.
3160
# New config value takes precedence if it differs from old
3161
# config value, otherwise use saved state.
3162
for name, value in client_settings[client_name].items():
3163
try:
3164
# For each value in new config, check if it
3165
# differs from the old config value (Except for
3166
# the "secret" attribute)
3167
if (name != "secret"
3168
and (value !=
3169
old_client_settings[client_name][name])):
3170
client[name] = value
3171
except KeyError:
3172
pass
3173
3174
# Clients who has passed its expire date can still be
3175
# enabled if its last checker was successful. A Client
3176
# whose checker succeeded before we stored its state is
3177
# assumed to have successfully run all checkers during
3178
# downtime.
3179
if client["enabled"]:
3180
if datetime.datetime.utcnow() >= client["expires"]:
3181
if not client["last_checked_ok"]:
3182
logger.warning(
3183
"disabling client {} - Client never "
3184
"performed a successful checker".format(
3185
client_name))
3186
client["enabled"] = False
3187
elif client["last_checker_status"] != 0:
3188
logger.warning(
3189
"disabling client {} - Client last"
3190
" checker failed with error code"
3191
" {}".format(
3192
client_name,
3193
client["last_checker_status"]))
3194
client["enabled"] = False
3195
else:
3196
client["expires"] = (
3197
datetime.datetime.utcnow()
3198
+ client["timeout"])
3199
logger.debug("Last checker succeeded,"
3200
" keeping {} enabled".format(
3201
client_name))
2045
3202
try:
2046
yield (name, special_settings[name]())
2047
except KeyError:
2048
yield (name, value)
2049
2050
tcp_server.clients.update(set(
2051
client_class(name = section,
2052
config= dict(client_config_items(
2053
client_config, section)))
2054
for section in client_config.sections()))
3203
client["secret"] = pgp.decrypt(
3204
client["encrypted_secret"],
3205
client_settings[client_name]["secret"])
3206
except PGPError:
3207
# If decryption fails, we use secret from new settings
3208
logger.debug("Failed to decrypt {} old secret".format(
3209
client_name))
3210
client["secret"] = (client_settings[client_name]
3211
["secret"])
3212
3213
# Add/remove clients based on new changes made to config
3214
for client_name in (set(old_client_settings)
3215
- set(client_settings)):
3216
del clients_data[client_name]
3217
for client_name in (set(client_settings)
3218
- set(old_client_settings)):
3219
clients_data[client_name] = client_settings[client_name]
3220
3221
# Create all client objects
3222
for client_name, client in clients_data.items():
3223
tcp_server.clients[client_name] = client_class(
3224
name=client_name,
3225
settings=client,
3226
server_settings=server_settings)
3227
2055
3228
if not tcp_server.clients:
2056
3229
logger.warning("No clients defined")
2057
2058
if not debug:
2059
try:
2060
with pidfile:
2061
pid = os.getpid()
2062
pidfile.write(str(pid) + "\n".encode("utf-8"))
2063
del pidfile
2064
except IOError:
2065
logger.error("Could not write to file %r with PID %d",
2066
pidfilename, pid)
2067
except NameError:
2068
# "pidfile" was never created
2069
pass
3230
3231
if not foreground:
3232
if pidfile is not None:
3233
pid = os.getpid()
3234
try:
3235
with pidfile:
3236
print(pid, file=pidfile)
3237
except IOError:
3238
logger.error("Could not write to file %r with PID %d",
3239
pidfilename, pid)
3240
del pidfile
2070
3241
del pidfilename
2071
2072
signal.signal(signal.SIGINT, signal.SIG_IGN)
2073
2074
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2075
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2076
3242
3243
for termsig in (signal.SIGHUP, signal.SIGTERM):
3244
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3245
lambda: main_loop.quit() and False)
3246
2077
3247
if use_dbus:
2078
class MandosDBusService(dbus.service.Object):
3248
3249
@alternate_dbus_interfaces(
3250
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3251
class MandosDBusService(DBusObjectWithObjectManager):
2079
3252
"""A D-Bus proxy object"""
3253
2080
3254
def __init__(self):
2081
3255
dbus.service.Object.__init__(self, bus, "/")
3256
2082
3257
_interface = "se.recompile.Mandos"
2083
3258
2084
3259
@dbus.service.signal(_interface, signature="o")
2085
3260
def ClientAdded(self, objpath):
2086
3261
"D-Bus signal"
2087
3262
pass
2088
3263
2089
3264
@dbus.service.signal(_interface, signature="ss")
2090
3265
def ClientNotFound(self, fingerprint, address):
2091
3266
"D-Bus signal"
2092
3267
pass
2093
3268
3269
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3270
"true"})
2094
3271
@dbus.service.signal(_interface, signature="os")
2095
3272
def ClientRemoved(self, objpath, name):
2096
3273
"D-Bus signal"
2097
3274
pass
2098
3275
3276
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3277
"true"})
2099
3278
@dbus.service.method(_interface, out_signature="ao")
2100
3279
def GetAllClients(self):
2101
3280
"D-Bus method"
2102
return dbus.Array(c.dbus_object_path
2103
for c in tcp_server.clients)
2104
3281
return dbus.Array(c.dbus_object_path for c in
3282
tcp_server.clients.values())
3283
3284
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3285
"true"})
2105
3286
@dbus.service.method(_interface,
2106
3287
out_signature="a{oa{sv}}")
2107
3288
def GetAllClientsWithProperties(self):
2108
3289
"D-Bus method"
2109
3290
return dbus.Dictionary(
2110
((c.dbus_object_path, c.GetAll(""))
2111
for c in tcp_server.clients),
3291
{c.dbus_object_path: c.GetAll(
3292
"se.recompile.Mandos.Client")
3293
for c in tcp_server.clients.values()},
2112
3294
signature="oa{sv}")
2113
3295
2114
3296
@dbus.service.method(_interface, in_signature="o")
2115
3297
def RemoveClient(self, object_path):
2116
3298
"D-Bus method"
2117
for c in tcp_server.clients:
3299
for c in tcp_server.clients.values():
2118
3300
if c.dbus_object_path == object_path:
2119
tcp_server.clients.remove(c)
3301
del tcp_server.clients[c.name]
2120
3302
c.remove_from_connection()
2121
# Don't signal anything except ClientRemoved
3303
# Don't signal the disabling
2122
3304
c.disable(quiet=True)
2123
# Emit D-Bus signal
2124
self.ClientRemoved(object_path, c.name)
3305
# Emit D-Bus signal for removal
3306
self.client_removed_signal(c)
2125
3307
return
2126
3308
raise KeyError(object_path)
2127
3309
2128
3310
del _interface
2129
2130
class MandosDBusServiceTransitional(MandosDBusService):
2131
__metaclass__ = AlternateDBusNamesMetaclass
2132
mandos_dbus_service = MandosDBusServiceTransitional()
2133
3311
3312
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3313
out_signature="a{oa{sa{sv}}}")
3314
def GetManagedObjects(self):
3315
"""D-Bus method"""
3316
return dbus.Dictionary(
3317
{client.dbus_object_path:
3318
dbus.Dictionary(
3319
{interface: client.GetAll(interface)
3320
for interface in
3321
client._get_all_interface_names()})
3322
for client in tcp_server.clients.values()})
3323
3324
def client_added_signal(self, client):
3325
"""Send the new standard signal and the old signal"""
3326
if use_dbus:
3327
# New standard signal
3328
self.InterfacesAdded(
3329
client.dbus_object_path,
3330
dbus.Dictionary(
3331
{interface: client.GetAll(interface)
3332
for interface in
3333
client._get_all_interface_names()}))
3334
# Old signal
3335
self.ClientAdded(client.dbus_object_path)
3336
3337
def client_removed_signal(self, client):
3338
"""Send the new standard signal and the old signal"""
3339
if use_dbus:
3340
# New standard signal
3341
self.InterfacesRemoved(
3342
client.dbus_object_path,
3343
client._get_all_interface_names())
3344
# Old signal
3345
self.ClientRemoved(client.dbus_object_path,
3346
client.name)
3347
3348
mandos_dbus_service = MandosDBusService()
3349
3350
# Save modules to variables to exempt the modules from being
3351
# unloaded before the function registered with atexit() is run.
3352
mp = multiprocessing
3353
wn = wnull
3354
2134
3355
def cleanup():
2135
3356
"Cleanup function; run on exit"
2136
service.cleanup()
2137
2138
multiprocessing.active_children()
3357
if zeroconf:
3358
service.cleanup()
3359
3360
mp.active_children()
3361
wn.close()
3362
if not (tcp_server.clients or client_settings):
3363
return
3364
3365
# Store client before exiting. Secrets are encrypted with key
3366
# based on what config file has. If config file is
3367
# removed/edited, old secret will thus be unrecovable.
3368
clients = {}
3369
with PGPEngine() as pgp:
3370
for client in tcp_server.clients.values():
3371
key = client_settings[client.name]["secret"]
3372
client.encrypted_secret = pgp.encrypt(client.secret,
3373
key)
3374
client_dict = {}
3375
3376
# A list of attributes that can not be pickled
3377
# + secret.
3378
exclude = {"bus", "changedstate", "secret",
3379
"checker", "server_settings"}
3380
for name, typ in inspect.getmembers(dbus.service
3381
.Object):
3382
exclude.add(name)
3383
3384
client_dict["encrypted_secret"] = (client
3385
.encrypted_secret)
3386
for attr in client.client_structure:
3387
if attr not in exclude:
3388
client_dict[attr] = getattr(client, attr)
3389
3390
clients[client.name] = client_dict
3391
del client_settings[client.name]["secret"]
3392
3393
try:
3394
with tempfile.NamedTemporaryFile(
3395
mode='wb',
3396
suffix=".pickle",
3397
prefix='clients-',
3398
dir=os.path.dirname(stored_state_path),
3399
delete=False) as stored_state:
3400
pickle.dump((clients, client_settings), stored_state,
3401
protocol=2)
3402
tempname = stored_state.name
3403
os.rename(tempname, stored_state_path)
3404
except (IOError, OSError) as e:
3405
if not debug:
3406
try:
3407
os.remove(tempname)
3408
except NameError:
3409
pass
3410
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3411
logger.warning("Could not save persistent state: {}"
3412
.format(os.strerror(e.errno)))
3413
else:
3414
logger.warning("Could not save persistent state:",
3415
exc_info=e)
3416
raise
3417
3418
# Delete all clients, and settings from config
2139
3419
while tcp_server.clients:
2140
client = tcp_server.clients.pop()
3420
name, client = tcp_server.clients.popitem()
2141
3421
if use_dbus:
2142
3422
client.remove_from_connection()
2143
client.disable_hook = None
2144
# Don't signal anything except ClientRemoved
3423
# Don't signal the disabling
2145
3424
client.disable(quiet=True)
3425
# Emit D-Bus signal for removal
2146
3426
if use_dbus:
2147
# Emit D-Bus signal
2148
mandos_dbus_service.ClientRemoved(client
2149
.dbus_object_path,
2150
client.name)
2151
3427
mandos_dbus_service.client_removed_signal(client)
3428
client_settings.clear()
3429
2152
3430
atexit.register(cleanup)
2153
2154
for client in tcp_server.clients:
3431
3432
for client in tcp_server.clients.values():
2155
3433
if use_dbus:
2156
# Emit D-Bus signal
2157
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2158
client.enable()
2159
3434
# Emit D-Bus signal for adding
3435
mandos_dbus_service.client_added_signal(client)
3436
# Need to initiate checking of clients
3437
if client.enabled:
3438
client.init_checker()
3439
2160
3440
tcp_server.enable()
2161
3441
tcp_server.server_activate()
2162
3442
2163
3443
# Find out what port we got
2164
service.port = tcp_server.socket.getsockname()[1]
3444
if zeroconf:
3445
service.port = tcp_server.socket.getsockname()[1]
2165
3446
if use_ipv6:
2166
3447
logger.info("Now listening on address %r, port %d,"
2167
" flowinfo %d, scope_id %d"
2168
% tcp_server.socket.getsockname())
3448
" flowinfo %d, scope_id %d",
3449
*tcp_server.socket.getsockname())
2169
3450
else: # IPv4
2170
logger.info("Now listening on address %r, port %d"
2171
% tcp_server.socket.getsockname())
2172
2173
#service.interface = tcp_server.socket.getsockname()[3]
2174
3451
logger.info("Now listening on address %r, port %d",
3452
*tcp_server.socket.getsockname())
3453
3454
# service.interface = tcp_server.socket.getsockname()[3]
3455
2175
3456
try:
2176
# From the Avahi example code
2177
try:
2178
service.activate()
2179
except dbus.exceptions.DBusException as error:
2180
logger.critical("DBusException: %s", error)
2181
cleanup()
2182
sys.exit(1)
2183
# End of Avahi example code
2184
2185
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2186
lambda *args, **kwargs:
2187
(tcp_server.handle_request
2188
(*args[2:], **kwargs) or True))
2189
3457
if zeroconf:
3458
# From the Avahi example code
3459
try:
3460
service.activate()
3461
except dbus.exceptions.DBusException as error:
3462
logger.critical("D-Bus Exception", exc_info=error)
3463
cleanup()
3464
sys.exit(1)
3465
# End of Avahi example code
3466
3467
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3468
lambda *args, **kwargs:
3469
(tcp_server.handle_request
3470
(*args[2:], **kwargs) or True))
3471
2190
3472
logger.debug("Starting main loop")
2191
3473
main_loop.run()
2192
3474
except AvahiError as error:
2193
logger.critical("AvahiError: %s", error)
3475
logger.critical("Avahi Error", exc_info=error)
2194
3476
cleanup()
2195
3477
sys.exit(1)
2196
3478
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0