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- Committer: Teddy Hogeborn
- Date: 2011-03-08 19:12:56 UTC
- mfrom: (237.7.20 trunk)
- Revision ID: teddy@fukt.bsnet.se-20110308191256-mjcukty9on3z0yhd
Merge from trunk.
- files removed:
- bugs.xml
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
5
#
5
#
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2016 Teddy Hogeborn
15
# Copyright © 2008-2016 Björn Påhlsson
16
#
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
#
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
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
#
31
# Contact the authors at <mandos@recompile.se>.
32
#
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
33
33
34
34
from __future__ import (division, absolute_import, print_function,
35
35
unicode_literals)
36
36
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
37
import SocketServer as socketserver
46
38
import socket
47
import argparse
39
import optparse
48
40
import datetime
49
41
import errno
50
try:
51
import ConfigParser as configparser
52
except ImportError:
53
import configparser
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
54
49
import sys
55
50
import re
56
51
import os
65
60
import struct
66
61
import fcntl
67
62
import functools
68
try:
69
import cPickle as pickle
70
except ImportError:
71
import pickle
63
import cPickle as pickle
72
64
import multiprocessing
73
import types
74
import binascii
75
import tempfile
76
import itertools
77
import collections
78
import codecs
79
65
80
66
import dbus
81
67
import dbus.service
82
from gi.repository import GLib
68
import gobject
69
import avahi
83
70
from dbus.mainloop.glib import DBusGMainLoop
84
71
import ctypes
85
72
import ctypes.util
86
73
import xml.dom.minidom
87
74
import inspect
88
75
89
# Try to find the value of SO_BINDTODEVICE:
90
76
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:
93
77
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
94
78
except AttributeError:
95
79
try:
96
# This is where SO_BINDTODEVICE was up to and including Python
97
# 2.6, and also 3.2:
98
80
from IN import SO_BINDTODEVICE
99
81
except ImportError:
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 = "1.7.13"
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
82
SO_BINDTODEVICE = None
83
84
85
version = "1.2.3"
86
87
#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
89
syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
95
logger.addHandler(syslogger)
96
97
console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
302
102
303
103
class AvahiError(Exception):
304
104
def __init__(self, value, *args, **kwargs):
305
105
self.value = value
306
return super(AvahiError, self).__init__(value, *args,
307
**kwargs)
308
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
309
109
310
110
class AvahiServiceError(AvahiError):
311
111
pass
312
112
313
314
113
class AvahiGroupError(AvahiError):
315
114
pass
316
115
317
116
318
117
class AvahiService(object):
319
118
"""An Avahi (Zeroconf) service.
320
119
321
120
Attributes:
322
121
interface: integer; avahi.IF_UNSPEC or an interface index.
323
122
Used to optionally bind to the specified interface.
324
123
name: string; Example: 'Mandos'
325
124
type: string; Example: '_mandos._tcp'.
326
See <https://www.iana.org/assignments/service-names-port-numbers>
125
See <http://www.dns-sd.org/ServiceTypes.html>
327
126
port: integer; what port to announce
328
127
TXT: list of strings; TXT record for the service
329
128
domain: string; Domain to publish on, default to .local if empty.
335
134
server: D-Bus Server
336
135
bus: dbus.SystemBus()
337
136
"""
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):
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
138
servicetype = None, port = None, TXT = None,
139
domain = "", host = "", max_renames = 32768,
140
protocol = avahi.PROTO_UNSPEC, bus = None):
350
141
self.interface = interface
351
142
self.name = name
352
143
self.type = servicetype
360
151
self.group = None # our entry group
361
152
self.server = None
362
153
self.bus = bus
363
self.entry_group_state_changed_match = None
364
365
def rename(self, remove=True):
154
def rename(self):
366
155
"""Derived from the Avahi example code"""
367
156
if self.rename_count >= self.max_renames:
368
157
logger.critical("No suitable Zeroconf service name found"
369
158
" after %i retries, exiting.",
370
159
self.rename_count)
371
160
raise AvahiServiceError("Too many renames")
372
self.name = str(
373
self.server.GetAlternativeServiceName(self.name))
374
self.rename_count += 1
161
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
375
162
logger.info("Changing Zeroconf service name to %r ...",
376
163
self.name)
377
if remove:
378
self.remove()
164
syslogger.setFormatter(logging.Formatter
165
('Mandos (%s) [%%(process)d]:'
166
' %%(levelname)s: %%(message)s'
167
% self.name))
168
self.remove()
379
169
try:
380
170
self.add()
381
except dbus.exceptions.DBusException as error:
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
171
except dbus.exceptions.DBusException, error:
172
logger.critical("DBusException: %s", error)
173
self.cleanup()
174
os._exit(1)
175
self.rename_count += 1
391
176
def remove(self):
392
177
"""Derived from the Avahi example code"""
393
if self.entry_group_state_changed_match is not None:
394
self.entry_group_state_changed_match.remove()
395
self.entry_group_state_changed_match = None
396
178
if self.group is not None:
397
179
self.group.Reset()
398
399
180
def add(self):
400
181
"""Derived from the Avahi example code"""
401
self.remove()
402
182
if self.group is None:
403
183
self.group = dbus.Interface(
404
184
self.bus.get_object(avahi.DBUS_NAME,
405
185
self.server.EntryGroupNew()),
406
186
avahi.DBUS_INTERFACE_ENTRY_GROUP)
407
self.entry_group_state_changed_match = (
408
self.group.connect_to_signal(
409
'StateChanged', self.entry_group_state_changed))
187
self.group.connect_to_signal('StateChanged',
188
self
189
.entry_group_state_changed)
410
190
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
411
191
self.name, self.type)
412
192
self.group.AddService(
418
198
dbus.UInt16(self.port),
419
199
avahi.string_array_to_txt_array(self.TXT))
420
200
self.group.Commit()
421
422
201
def entry_group_state_changed(self, state, error):
423
202
"""Derived from the Avahi example code"""
424
203
logger.debug("Avahi entry group state change: %i", state)
425
204
426
205
if state == avahi.ENTRY_GROUP_ESTABLISHED:
427
206
logger.debug("Zeroconf service established.")
428
207
elif state == avahi.ENTRY_GROUP_COLLISION:
430
209
self.rename()
431
210
elif state == avahi.ENTRY_GROUP_FAILURE:
432
211
logger.critical("Avahi: Error in group state changed %s",
433
str(error))
434
raise AvahiGroupError("State changed: {!s}".format(error))
435
212
unicode(error))
213
raise AvahiGroupError("State changed: %s"
214
% unicode(error))
436
215
def cleanup(self):
437
216
"""Derived from the Avahi example code"""
438
217
if self.group is not None:
439
try:
440
self.group.Free()
441
except (dbus.exceptions.UnknownMethodException,
442
dbus.exceptions.DBusException):
443
pass
218
self.group.Free()
444
219
self.group = None
445
self.remove()
446
447
def server_state_changed(self, state, error=None):
220
def server_state_changed(self, state):
448
221
"""Derived from the Avahi example code"""
449
222
logger.debug("Avahi server state change: %i", state)
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
}
456
if state in bad_states:
457
if bad_states[state] is not None:
458
if error is None:
459
logger.error(bad_states[state])
460
else:
461
logger.error(bad_states[state] + ": %r", error)
462
self.cleanup()
223
if state == avahi.SERVER_COLLISION:
224
logger.error("Zeroconf server name collision")
225
self.remove()
463
226
elif state == avahi.SERVER_RUNNING:
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)
476
else:
477
if error is None:
478
logger.debug("Unknown state: %r", state)
479
else:
480
logger.debug("Unknown state: %r: %r", state, error)
481
227
self.add()
482
228
def activate(self):
483
229
"""Derived from the Avahi example code"""
484
230
if self.server is None:
485
231
self.server = dbus.Interface(
486
232
self.bus.get_object(avahi.DBUS_NAME,
487
avahi.DBUS_PATH_SERVER,
488
follow_name_owner_changes=True),
233
avahi.DBUS_PATH_SERVER),
489
234
avahi.DBUS_INTERFACE_SERVER)
490
235
self.server.connect_to_signal("StateChanged",
491
self.server_state_changed)
236
self.server_state_changed)
492
237
self.server_state_changed(self.server.GetState())
493
238
494
239
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.util.find_library("gnutls")
511
if library is None:
512
library = ctypes.util.find_library("gnutls-deb0")
513
_library = ctypes.cdll.LoadLibrary(library)
514
del library
515
_need_version = b"3.3.0"
516
517
def __init__(self):
518
# Need to use "self" here, since this method is called before
519
# the assignment to the "gnutls" global variable happens.
520
if self.check_version(self._need_version) is None:
521
raise self.Error("Needs GnuTLS {} or later"
522
.format(self._need_version))
523
524
# Unless otherwise indicated, the constants and types below are
525
# all from the gnutls/gnutls.h C header file.
526
527
# Constants
528
E_SUCCESS = 0
529
E_INTERRUPTED = -52
530
E_AGAIN = -28
531
CRT_OPENPGP = 2
532
CLIENT = 2
533
SHUT_RDWR = 0
534
CRD_CERTIFICATE = 1
535
E_NO_CERTIFICATE_FOUND = -49
536
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
537
538
# Types
539
class session_int(ctypes.Structure):
540
_fields_ = []
541
session_t = ctypes.POINTER(session_int)
542
543
class certificate_credentials_st(ctypes.Structure):
544
_fields_ = []
545
certificate_credentials_t = ctypes.POINTER(
546
certificate_credentials_st)
547
certificate_type_t = ctypes.c_int
548
549
class datum_t(ctypes.Structure):
550
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
551
('size', ctypes.c_uint)]
552
553
class openpgp_crt_int(ctypes.Structure):
554
_fields_ = []
555
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
556
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
557
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
558
credentials_type_t = ctypes.c_int
559
transport_ptr_t = ctypes.c_void_p
560
close_request_t = ctypes.c_int
561
562
# Exceptions
563
class Error(Exception):
564
# We need to use the class name "GnuTLS" here, since this
565
# exception might be raised from within GnuTLS.__init__,
566
# which is called before the assignment to the "gnutls"
567
# global variable has happened.
568
def __init__(self, message=None, code=None, args=()):
569
# Default usage is by a message string, but if a return
570
# code is passed, convert it to a string with
571
# gnutls.strerror()
572
self.code = code
573
if message is None and code is not None:
574
message = GnuTLS.strerror(code)
575
return super(GnuTLS.Error, self).__init__(
576
message, *args)
577
578
class CertificateSecurityError(Error):
579
pass
580
581
# Classes
582
class Credentials(object):
583
def __init__(self):
584
self._c_object = gnutls.certificate_credentials_t()
585
gnutls.certificate_allocate_credentials(
586
ctypes.byref(self._c_object))
587
self.type = gnutls.CRD_CERTIFICATE
588
589
def __del__(self):
590
gnutls.certificate_free_credentials(self._c_object)
591
592
class ClientSession(object):
593
def __init__(self, socket, credentials=None):
594
self._c_object = gnutls.session_t()
595
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
596
gnutls.set_default_priority(self._c_object)
597
gnutls.transport_set_ptr(self._c_object, socket.fileno())
598
gnutls.handshake_set_private_extensions(self._c_object,
599
True)
600
self.socket = socket
601
if credentials is None:
602
credentials = gnutls.Credentials()
603
gnutls.credentials_set(self._c_object, credentials.type,
604
ctypes.cast(credentials._c_object,
605
ctypes.c_void_p))
606
self.credentials = credentials
607
608
def __del__(self):
609
gnutls.deinit(self._c_object)
610
611
def handshake(self):
612
return gnutls.handshake(self._c_object)
613
614
def send(self, data):
615
data = bytes(data)
616
data_len = len(data)
617
while data_len > 0:
618
data_len -= gnutls.record_send(self._c_object,
619
data[-data_len:],
620
data_len)
621
622
def bye(self):
623
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
624
625
# Error handling functions
626
def _error_code(result):
627
"""A function to raise exceptions on errors, suitable
628
for the 'restype' attribute on ctypes functions"""
629
if result >= 0:
630
return result
631
if result == gnutls.E_NO_CERTIFICATE_FOUND:
632
raise gnutls.CertificateSecurityError(code=result)
633
raise gnutls.Error(code=result)
634
635
def _retry_on_error(result, func, arguments):
636
"""A function to retry on some errors, suitable
637
for the 'errcheck' attribute on ctypes functions"""
638
while result < 0:
639
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
640
return _error_code(result)
641
result = func(*arguments)
642
return result
643
644
# Unless otherwise indicated, the function declarations below are
645
# all from the gnutls/gnutls.h C header file.
646
647
# Functions
648
priority_set_direct = _library.gnutls_priority_set_direct
649
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
650
ctypes.POINTER(ctypes.c_char_p)]
651
priority_set_direct.restype = _error_code
652
653
init = _library.gnutls_init
654
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
655
init.restype = _error_code
656
657
set_default_priority = _library.gnutls_set_default_priority
658
set_default_priority.argtypes = [session_t]
659
set_default_priority.restype = _error_code
660
661
record_send = _library.gnutls_record_send
662
record_send.argtypes = [session_t, ctypes.c_void_p,
663
ctypes.c_size_t]
664
record_send.restype = ctypes.c_ssize_t
665
record_send.errcheck = _retry_on_error
666
667
certificate_allocate_credentials = (
668
_library.gnutls_certificate_allocate_credentials)
669
certificate_allocate_credentials.argtypes = [
670
ctypes.POINTER(certificate_credentials_t)]
671
certificate_allocate_credentials.restype = _error_code
672
673
certificate_free_credentials = (
674
_library.gnutls_certificate_free_credentials)
675
certificate_free_credentials.argtypes = [
676
certificate_credentials_t]
677
certificate_free_credentials.restype = None
678
679
handshake_set_private_extensions = (
680
_library.gnutls_handshake_set_private_extensions)
681
handshake_set_private_extensions.argtypes = [session_t,
682
ctypes.c_int]
683
handshake_set_private_extensions.restype = None
684
685
credentials_set = _library.gnutls_credentials_set
686
credentials_set.argtypes = [session_t, credentials_type_t,
687
ctypes.c_void_p]
688
credentials_set.restype = _error_code
689
690
strerror = _library.gnutls_strerror
691
strerror.argtypes = [ctypes.c_int]
692
strerror.restype = ctypes.c_char_p
693
694
certificate_type_get = _library.gnutls_certificate_type_get
695
certificate_type_get.argtypes = [session_t]
696
certificate_type_get.restype = _error_code
697
698
certificate_get_peers = _library.gnutls_certificate_get_peers
699
certificate_get_peers.argtypes = [session_t,
700
ctypes.POINTER(ctypes.c_uint)]
701
certificate_get_peers.restype = ctypes.POINTER(datum_t)
702
703
global_set_log_level = _library.gnutls_global_set_log_level
704
global_set_log_level.argtypes = [ctypes.c_int]
705
global_set_log_level.restype = None
706
707
global_set_log_function = _library.gnutls_global_set_log_function
708
global_set_log_function.argtypes = [log_func]
709
global_set_log_function.restype = None
710
711
deinit = _library.gnutls_deinit
712
deinit.argtypes = [session_t]
713
deinit.restype = None
714
715
handshake = _library.gnutls_handshake
716
handshake.argtypes = [session_t]
717
handshake.restype = _error_code
718
handshake.errcheck = _retry_on_error
719
720
transport_set_ptr = _library.gnutls_transport_set_ptr
721
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
722
transport_set_ptr.restype = None
723
724
bye = _library.gnutls_bye
725
bye.argtypes = [session_t, close_request_t]
726
bye.restype = _error_code
727
bye.errcheck = _retry_on_error
728
729
check_version = _library.gnutls_check_version
730
check_version.argtypes = [ctypes.c_char_p]
731
check_version.restype = ctypes.c_char_p
732
733
# All the function declarations below are from gnutls/openpgp.h
734
735
openpgp_crt_init = _library.gnutls_openpgp_crt_init
736
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
737
openpgp_crt_init.restype = _error_code
738
739
openpgp_crt_import = _library.gnutls_openpgp_crt_import
740
openpgp_crt_import.argtypes = [openpgp_crt_t,
741
ctypes.POINTER(datum_t),
742
openpgp_crt_fmt_t]
743
openpgp_crt_import.restype = _error_code
744
745
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
746
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
747
ctypes.POINTER(ctypes.c_uint)]
748
openpgp_crt_verify_self.restype = _error_code
749
750
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
751
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
752
openpgp_crt_deinit.restype = None
753
754
openpgp_crt_get_fingerprint = (
755
_library.gnutls_openpgp_crt_get_fingerprint)
756
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
757
ctypes.c_void_p,
758
ctypes.POINTER(
759
ctypes.c_size_t)]
760
openpgp_crt_get_fingerprint.restype = _error_code
761
762
# Remove non-public functions
763
del _error_code, _retry_on_error
764
# Create the global "gnutls" object, simulating a module
765
gnutls = GnuTLS()
766
767
768
def call_pipe(connection, # : multiprocessing.Connection
769
func, *args, **kwargs):
770
"""This function is meant to be called by multiprocessing.Process
771
772
This function runs func(*args, **kwargs), and writes the resulting
773
return value on the provided multiprocessing.Connection.
774
"""
775
connection.send(func(*args, **kwargs))
776
connection.close()
777
778
779
240
class Client(object):
780
241
"""A representation of a client host served by this server.
781
242
782
243
Attributes:
783
approved: bool(); 'None' if not yet approved/disapproved
244
_approved: bool(); 'None' if not yet approved/disapproved
784
245
approval_delay: datetime.timedelta(); Time to wait for approval
785
246
approval_duration: datetime.timedelta(); Duration of one approval
786
247
checker: subprocess.Popen(); a running checker process used
787
248
to see if the client lives.
788
249
'None' if no process is running.
789
checker_callback_tag: a GLib event source tag, or None
250
checker_callback_tag: a gobject event source tag, or None
790
251
checker_command: string; External command which is run to check
791
252
if client lives. %() expansions are done at
792
253
runtime with vars(self) as dict, so that for
793
254
instance %(name)s can be used in the command.
794
checker_initiator_tag: a GLib event source tag, or None
255
checker_initiator_tag: a gobject event source tag, or None
795
256
created: datetime.datetime(); (UTC) object creation
796
client_structure: Object describing what attributes a client has
797
and is used for storing the client at exit
798
257
current_checker_command: string; current running checker_command
799
disable_initiator_tag: a GLib event source tag, or None
258
disable_hook: If set, called by disable() as disable_hook(self)
259
disable_initiator_tag: a gobject event source tag, or None
800
260
enabled: bool()
801
261
fingerprint: string (40 or 32 hexadecimal digits); used to
802
262
uniquely identify the client
804
264
interval: datetime.timedelta(); How often to start a new checker
805
265
last_approval_request: datetime.datetime(); (UTC) or None
806
266
last_checked_ok: datetime.datetime(); (UTC) or None
807
last_checker_status: integer between 0 and 255 reflecting exit
808
status of last checker. -1 reflects crashed
809
checker, -2 means no checker completed yet.
810
last_checker_signal: The signal which killed the last checker, if
811
last_checker_status is -1
812
last_enabled: datetime.datetime(); (UTC) or None
267
last_enabled: datetime.datetime(); (UTC)
813
268
name: string; from the config file, used in log messages and
814
269
D-Bus identifiers
815
270
secret: bytestring; sent verbatim (over TLS) to client
816
271
timeout: datetime.timedelta(); How long from last_checked_ok
817
272
until this client is disabled
818
extended_timeout: extra long timeout when secret has been sent
819
273
runtime_expansions: Allowed attributes for runtime expansion.
820
expires: datetime.datetime(); time (UTC) when a client will be
821
disabled, or None
822
server_settings: The server_settings dict from main()
823
274
"""
824
275
825
276
runtime_expansions = ("approval_delay", "approval_duration",
826
"created", "enabled", "expires",
827
"fingerprint", "host", "interval",
828
"last_approval_request", "last_checked_ok",
277
"created", "enabled", "fingerprint",
278
"host", "interval", "last_checked_ok",
829
279
"last_enabled", "name", "timeout")
830
client_defaults = {
831
"timeout": "PT5M",
832
"extended_timeout": "PT15M",
833
"interval": "PT2M",
834
"checker": "fping -q -- %%(host)s",
835
"host": "",
836
"approval_delay": "PT0S",
837
"approval_duration": "PT1S",
838
"approved_by_default": "True",
839
"enabled": "True",
840
}
841
280
842
281
@staticmethod
843
def config_parser(config):
844
"""Construct a new dict of client settings of this form:
845
{ client_name: {setting_name: value, ...}, ...}
846
with exceptions for any special settings as defined above.
847
NOTE: Must be a pure function. Must return the same result
848
value given the same arguments.
849
"""
850
settings = {}
851
for client_name in config.sections():
852
section = dict(config.items(client_name))
853
client = settings[client_name] = {}
854
855
client["host"] = section["host"]
856
# Reformat values from string types to Python types
857
client["approved_by_default"] = config.getboolean(
858
client_name, "approved_by_default")
859
client["enabled"] = config.getboolean(client_name,
860
"enabled")
861
862
# Uppercase and remove spaces from fingerprint for later
863
# comparison purposes with return value from the
864
# fingerprint() function
865
client["fingerprint"] = (section["fingerprint"].upper()
866
.replace(" ", ""))
867
if "secret" in section:
868
client["secret"] = codecs.decode(section["secret"]
869
.encode("utf-8"),
870
"base64")
871
elif "secfile" in section:
872
with open(os.path.expanduser(os.path.expandvars
873
(section["secfile"])),
874
"rb") as secfile:
875
client["secret"] = secfile.read()
876
else:
877
raise TypeError("No secret or secfile for section {}"
878
.format(section))
879
client["timeout"] = string_to_delta(section["timeout"])
880
client["extended_timeout"] = string_to_delta(
881
section["extended_timeout"])
882
client["interval"] = string_to_delta(section["interval"])
883
client["approval_delay"] = string_to_delta(
884
section["approval_delay"])
885
client["approval_duration"] = string_to_delta(
886
section["approval_duration"])
887
client["checker_command"] = section["checker"]
888
client["last_approval_request"] = None
889
client["last_checked_ok"] = None
890
client["last_checker_status"] = -2
891
892
return settings
893
894
def __init__(self, settings, name=None, server_settings=None):
282
def _timedelta_to_milliseconds(td):
283
"Convert a datetime.timedelta() to milliseconds"
284
return ((td.days * 24 * 60 * 60 * 1000)
285
+ (td.seconds * 1000)
286
+ (td.microseconds // 1000))
287
288
def timeout_milliseconds(self):
289
"Return the 'timeout' attribute in milliseconds"
290
return self._timedelta_to_milliseconds(self.timeout)
291
292
def interval_milliseconds(self):
293
"Return the 'interval' attribute in milliseconds"
294
return self._timedelta_to_milliseconds(self.interval)
295
296
def approval_delay_milliseconds(self):
297
return self._timedelta_to_milliseconds(self.approval_delay)
298
299
def __init__(self, name = None, disable_hook=None, config=None):
300
"""Note: the 'checker' key in 'config' sets the
301
'checker_command' attribute and *not* the 'checker'
302
attribute."""
895
303
self.name = name
896
if server_settings is None:
897
server_settings = {}
898
self.server_settings = server_settings
899
# adding all client settings
900
for setting, value in settings.items():
901
setattr(self, setting, value)
902
903
if self.enabled:
904
if not hasattr(self, "last_enabled"):
905
self.last_enabled = datetime.datetime.utcnow()
906
if not hasattr(self, "expires"):
907
self.expires = (datetime.datetime.utcnow()
908
+ self.timeout)
909
else:
910
self.last_enabled = None
911
self.expires = None
912
304
if config is None:
305
config = {}
913
306
logger.debug("Creating client %r", self.name)
307
# Uppercase and remove spaces from fingerprint for later
308
# comparison purposes with return value from the fingerprint()
309
# function
310
self.fingerprint = (config["fingerprint"].upper()
311
.replace(" ", ""))
914
312
logger.debug(" Fingerprint: %s", self.fingerprint)
915
self.created = settings.get("created",
916
datetime.datetime.utcnow())
917
918
# attributes specific for this server instance
313
if "secret" in config:
314
self.secret = config["secret"].decode("base64")
315
elif "secfile" in config:
316
with open(os.path.expanduser(os.path.expandvars
317
(config["secfile"])),
318
"rb") as secfile:
319
self.secret = secfile.read()
320
else:
321
raise TypeError("No secret or secfile for client %s"
322
% self.name)
323
self.host = config.get("host", "")
324
self.created = datetime.datetime.utcnow()
325
self.enabled = False
326
self.last_approval_request = None
327
self.last_enabled = None
328
self.last_checked_ok = None
329
self.timeout = string_to_delta(config["timeout"])
330
self.interval = string_to_delta(config["interval"])
331
self.disable_hook = disable_hook
919
332
self.checker = None
920
333
self.checker_initiator_tag = None
921
334
self.disable_initiator_tag = None
922
335
self.checker_callback_tag = None
336
self.checker_command = config["checker"]
923
337
self.current_checker_command = None
924
self.approved = None
338
self.last_connect = None
339
self._approved = None
340
self.approved_by_default = config.get("approved_by_default",
341
True)
925
342
self.approvals_pending = 0
926
self.changedstate = multiprocessing_manager.Condition(
927
multiprocessing_manager.Lock())
928
self.client_structure = [attr
929
for attr in self.__dict__.keys()
930
if not attr.startswith("_")]
931
self.client_structure.append("client_structure")
932
933
for name, t in inspect.getmembers(
934
type(self), lambda obj: isinstance(obj, property)):
935
if not name.startswith("_"):
936
self.client_structure.append(name)
937
938
# Send notice to process children that client state has changed
343
self.approval_delay = string_to_delta(
344
config["approval_delay"])
345
self.approval_duration = string_to_delta(
346
config["approval_duration"])
347
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
348
939
349
def send_changedstate(self):
940
with self.changedstate:
941
self.changedstate.notify_all()
942
350
self.changedstate.acquire()
351
self.changedstate.notify_all()
352
self.changedstate.release()
353
943
354
def enable(self):
944
355
"""Start this client's checker and timeout hooks"""
945
356
if getattr(self, "enabled", False):
946
357
# Already enabled
947
358
return
948
self.expires = datetime.datetime.utcnow() + self.timeout
949
self.enabled = True
359
self.send_changedstate()
950
360
self.last_enabled = datetime.datetime.utcnow()
951
self.init_checker()
952
self.send_changedstate()
953
361
# Schedule a new checker to be started an 'interval' from now,
362
# and every interval from then on.
363
self.checker_initiator_tag = (gobject.timeout_add
364
(self.interval_milliseconds(),
365
self.start_checker))
366
# Schedule a disable() when 'timeout' has passed
367
self.disable_initiator_tag = (gobject.timeout_add
368
(self.timeout_milliseconds(),
369
self.disable))
370
self.enabled = True
371
# Also start a new checker *right now*.
372
self.start_checker()
373
954
374
def disable(self, quiet=True):
955
375
"""Disable this client."""
956
376
if not getattr(self, "enabled", False):
957
377
return False
958
378
if not quiet:
379
self.send_changedstate()
380
if not quiet:
959
381
logger.info("Disabling client %s", self.name)
960
if getattr(self, "disable_initiator_tag", None) is not None:
961
GLib.source_remove(self.disable_initiator_tag)
382
if getattr(self, "disable_initiator_tag", False):
383
gobject.source_remove(self.disable_initiator_tag)
962
384
self.disable_initiator_tag = None
963
self.expires = None
964
if getattr(self, "checker_initiator_tag", None) is not None:
965
GLib.source_remove(self.checker_initiator_tag)
385
if getattr(self, "checker_initiator_tag", False):
386
gobject.source_remove(self.checker_initiator_tag)
966
387
self.checker_initiator_tag = None
967
388
self.stop_checker()
389
if self.disable_hook:
390
self.disable_hook(self)
968
391
self.enabled = False
969
if not quiet:
970
self.send_changedstate()
971
# Do not run this again if called by a GLib.timeout_add
392
# Do not run this again if called by a gobject.timeout_add
972
393
return False
973
394
974
395
def __del__(self):
396
self.disable_hook = None
975
397
self.disable()
976
977
def init_checker(self):
978
# Schedule a new checker to be started an 'interval' from now,
979
# and every interval from then on.
980
if self.checker_initiator_tag is not None:
981
GLib.source_remove(self.checker_initiator_tag)
982
self.checker_initiator_tag = GLib.timeout_add(
983
int(self.interval.total_seconds() * 1000),
984
self.start_checker)
985
# Schedule a disable() when 'timeout' has passed
986
if self.disable_initiator_tag is not None:
987
GLib.source_remove(self.disable_initiator_tag)
988
self.disable_initiator_tag = GLib.timeout_add(
989
int(self.timeout.total_seconds() * 1000), self.disable)
990
# Also start a new checker *right now*.
991
self.start_checker()
992
993
def checker_callback(self, source, condition, connection,
994
command):
398
399
def checker_callback(self, pid, condition, command):
995
400
"""The checker has completed, so take appropriate actions."""
996
401
self.checker_callback_tag = None
997
402
self.checker = None
998
# Read return code from connection (see call_pipe)
999
returncode = connection.recv()
1000
connection.close()
1001
1002
if returncode >= 0:
1003
self.last_checker_status = returncode
1004
self.last_checker_signal = None
1005
if self.last_checker_status == 0:
403
if os.WIFEXITED(condition):
404
exitstatus = os.WEXITSTATUS(condition)
405
if exitstatus == 0:
1006
406
logger.info("Checker for %(name)s succeeded",
1007
407
vars(self))
1008
408
self.checked_ok()
1009
409
else:
1010
logger.info("Checker for %(name)s failed", vars(self))
410
logger.info("Checker for %(name)s failed",
411
vars(self))
1011
412
else:
1012
self.last_checker_status = -1
1013
self.last_checker_signal = -returncode
1014
413
logger.warning("Checker for %(name)s crashed?",
1015
414
vars(self))
1016
return False
1017
415
1018
416
def checked_ok(self):
1019
"""Assert that the client has been seen, alive and well."""
417
"""Bump up the timeout for this client.
418
419
This should only be called when the client has been seen,
420
alive and well.
421
"""
1020
422
self.last_checked_ok = datetime.datetime.utcnow()
1021
self.last_checker_status = 0
1022
self.last_checker_signal = None
1023
self.bump_timeout()
1024
1025
def bump_timeout(self, timeout=None):
1026
"""Bump up the timeout for this client."""
1027
if timeout is None:
1028
timeout = self.timeout
1029
if self.disable_initiator_tag is not None:
1030
GLib.source_remove(self.disable_initiator_tag)
1031
self.disable_initiator_tag = None
1032
if getattr(self, "enabled", False):
1033
self.disable_initiator_tag = GLib.timeout_add(
1034
int(timeout.total_seconds() * 1000), self.disable)
1035
self.expires = datetime.datetime.utcnow() + timeout
1036
423
gobject.source_remove(self.disable_initiator_tag)
424
self.disable_initiator_tag = (gobject.timeout_add
425
(self.timeout_milliseconds(),
426
self.disable))
427
1037
428
def need_approval(self):
1038
429
self.last_approval_request = datetime.datetime.utcnow()
1039
430
1040
431
def start_checker(self):
1041
432
"""Start a new checker subprocess if one is not running.
1042
433
1043
434
If a checker already exists, leave it running and do
1044
435
nothing."""
1045
436
# The reason for not killing a running checker is that if we
1046
# did that, and if a checker (for some reason) started running
1047
# slowly and taking more than 'interval' time, then the client
1048
# would inevitably timeout, since no checker would get a
1049
# chance to run to completion. If we instead leave running
437
# did that, then if a checker (for some reason) started
438
# running slowly and taking more than 'interval' time, the
439
# client would inevitably timeout, since no checker would get
440
# a chance to run to completion. If we instead leave running
1050
441
# checkers alone, the checker would have to take more time
1051
442
# than 'timeout' for the client to be disabled, which is as it
1052
443
# should be.
1053
1054
if self.checker is not None and not self.checker.is_alive():
1055
logger.warning("Checker was not alive; joining")
1056
self.checker.join()
1057
self.checker = None
444
445
# If a checker exists, make sure it is not a zombie
446
try:
447
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
448
except (AttributeError, OSError), error:
449
if (isinstance(error, OSError)
450
and error.errno != errno.ECHILD):
451
raise error
452
else:
453
if pid:
454
logger.warning("Checker was a zombie")
455
gobject.source_remove(self.checker_callback_tag)
456
self.checker_callback(pid, status,
457
self.current_checker_command)
1058
458
# Start a new checker if needed
1059
459
if self.checker is None:
1060
# Escape attributes for the shell
1061
escaped_attrs = {
1062
attr: re.escape(str(getattr(self, attr)))
1063
for attr in self.runtime_expansions}
1064
460
try:
1065
command = self.checker_command % escaped_attrs
1066
except TypeError as error:
1067
logger.error('Could not format string "%s"',
1068
self.checker_command,
1069
exc_info=error)
1070
return True # Try again later
461
# In case checker_command has exactly one % operator
462
command = self.checker_command % self.host
463
except TypeError:
464
# Escape attributes for the shell
465
escaped_attrs = dict(
466
(attr,
467
re.escape(unicode(str(getattr(self, attr, "")),
468
errors=
469
'replace')))
470
for attr in
471
self.runtime_expansions)
472
473
try:
474
command = self.checker_command % escaped_attrs
475
except TypeError, error:
476
logger.error('Could not format string "%s":'
477
' %s', self.checker_command, error)
478
return True # Try again later
1071
479
self.current_checker_command = command
1072
logger.info("Starting checker %r for %s", command,
1073
self.name)
1074
# We don't need to redirect stdout and stderr, since
1075
# in normal mode, that is already done by daemon(),
1076
# and in debug mode we don't want to. (Stdin is
1077
# always replaced by /dev/null.)
1078
# The exception is when not debugging but nevertheless
1079
# running in the foreground; use the previously
1080
# created wnull.
1081
popen_args = {"close_fds": True,
1082
"shell": True,
1083
"cwd": "/"}
1084
if (not self.server_settings["debug"]
1085
and self.server_settings["foreground"]):
1086
popen_args.update({"stdout": wnull,
1087
"stderr": wnull})
1088
pipe = multiprocessing.Pipe(duplex=False)
1089
self.checker = multiprocessing.Process(
1090
target=call_pipe,
1091
args=(pipe[1], subprocess.call, command),
1092
kwargs=popen_args)
1093
self.checker.start()
1094
self.checker_callback_tag = GLib.io_add_watch(
1095
pipe[0].fileno(), GLib.IO_IN,
1096
self.checker_callback, pipe[0], command)
1097
# Re-run this periodically if run by GLib.timeout_add
480
try:
481
logger.info("Starting checker %r for %s",
482
command, self.name)
483
# We don't need to redirect stdout and stderr, since
484
# in normal mode, that is already done by daemon(),
485
# and in debug mode we don't want to. (Stdin is
486
# always replaced by /dev/null.)
487
self.checker = subprocess.Popen(command,
488
close_fds=True,
489
shell=True, cwd="/")
490
self.checker_callback_tag = (gobject.child_watch_add
491
(self.checker.pid,
492
self.checker_callback,
493
data=command))
494
# The checker may have completed before the gobject
495
# watch was added. Check for this.
496
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
497
if pid:
498
gobject.source_remove(self.checker_callback_tag)
499
self.checker_callback(pid, status, command)
500
except OSError, error:
501
logger.error("Failed to start subprocess: %s",
502
error)
503
# Re-run this periodically if run by gobject.timeout_add
1098
504
return True
1099
505
1100
506
def stop_checker(self):
1101
507
"""Force the checker process, if any, to stop."""
1102
508
if self.checker_callback_tag:
1103
GLib.source_remove(self.checker_callback_tag)
509
gobject.source_remove(self.checker_callback_tag)
1104
510
self.checker_callback_tag = None
1105
511
if getattr(self, "checker", None) is None:
1106
512
return
1107
513
logger.debug("Stopping checker for %(name)s", vars(self))
1108
self.checker.terminate()
514
try:
515
os.kill(self.checker.pid, signal.SIGTERM)
516
#time.sleep(0.5)
517
#if self.checker.poll() is None:
518
# os.kill(self.checker.pid, signal.SIGKILL)
519
except OSError, error:
520
if error.errno != errno.ESRCH: # No such process
521
raise
1109
522
self.checker = None
1110
523
1111
1112
def dbus_service_property(dbus_interface,
1113
signature="v",
1114
access="readwrite",
1115
byte_arrays=False):
524
def dbus_service_property(dbus_interface, signature="v",
525
access="readwrite", byte_arrays=False):
1116
526
"""Decorators for marking methods of a DBusObjectWithProperties to
1117
527
become properties on the D-Bus.
1118
528
1119
529
The decorated method will be called with no arguments by "Get"
1120
530
and with one argument by "Set".
1121
531
1122
532
The parameters, where they are supported, are the same as
1123
533
dbus.service.method, except there is only "signature", since the
1124
534
type from Get() and the type sent to Set() is the same.
1127
537
# "Set" method, so we fail early here:
1128
538
if byte_arrays and signature != "ay":
1129
539
raise ValueError("Byte arrays not supported for non-'ay'"
1130
" signature {!r}".format(signature))
1131
540
" signature %r" % signature)
1132
541
def decorator(func):
1133
542
func._dbus_is_property = True
1134
543
func._dbus_interface = dbus_interface
1137
546
func._dbus_name = func.__name__
1138
547
if func._dbus_name.endswith("_dbus_property"):
1139
548
func._dbus_name = func._dbus_name[:-14]
1140
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1141
return func
1142
1143
return decorator
1144
1145
1146
def dbus_interface_annotations(dbus_interface):
1147
"""Decorator for marking functions returning interface annotations
1148
1149
Usage:
1150
1151
@dbus_interface_annotations("org.example.Interface")
1152
def _foo(self): # Function name does not matter
1153
return {"org.freedesktop.DBus.Deprecated": "true",
1154
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1155
"false"}
1156
"""
1157
1158
def decorator(func):
1159
func._dbus_is_interface = True
1160
func._dbus_interface = dbus_interface
1161
func._dbus_name = dbus_interface
1162
return func
1163
1164
return decorator
1165
1166
1167
def dbus_annotations(annotations):
1168
"""Decorator to annotate D-Bus methods, signals or properties
1169
Usage:
1170
1171
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1172
"org.freedesktop.DBus.Property."
1173
"EmitsChangedSignal": "false"})
1174
@dbus_service_property("org.example.Interface", signature="b",
1175
access="r")
1176
def Property_dbus_property(self):
1177
return dbus.Boolean(False)
1178
1179
See also the DBusObjectWithAnnotations class.
1180
"""
1181
1182
def decorator(func):
1183
func._dbus_annotations = annotations
1184
return func
1185
549
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
550
return func
1186
551
return decorator
1187
552
1188
553
1189
554
class DBusPropertyException(dbus.exceptions.DBusException):
1190
555
"""A base class for D-Bus property-related exceptions
1191
556
"""
1192
pass
557
def __unicode__(self):
558
return unicode(str(self))
1193
559
1194
560
1195
561
class DBusPropertyAccessException(DBusPropertyException):
1204
570
pass
1205
571
1206
572
1207
class DBusObjectWithAnnotations(dbus.service.Object):
1208
"""A D-Bus object with annotations.
1209
1210
Classes inheriting from this can use the dbus_annotations
1211
decorator to add annotations to methods or signals.
1212
"""
1213
1214
@staticmethod
1215
def _is_dbus_thing(thing):
1216
"""Returns a function testing if an attribute is a D-Bus thing
1217
1218
If called like _is_dbus_thing("method") it returns a function
1219
suitable for use as predicate to inspect.getmembers().
1220
"""
1221
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1222
False)
1223
1224
def _get_all_dbus_things(self, thing):
1225
"""Returns a generator of (name, attribute) pairs
1226
"""
1227
return ((getattr(athing.__get__(self), "_dbus_name", name),
1228
athing.__get__(self))
1229
for cls in self.__class__.__mro__
1230
for name, athing in
1231
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1232
1233
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1234
out_signature="s",
1235
path_keyword='object_path',
1236
connection_keyword='connection')
1237
def Introspect(self, object_path, connection):
1238
"""Overloading of standard D-Bus method.
1239
1240
Inserts annotation tags on methods and signals.
1241
"""
1242
xmlstring = dbus.service.Object.Introspect(self, object_path,
1243
connection)
1244
try:
1245
document = xml.dom.minidom.parseString(xmlstring)
1246
1247
for if_tag in document.getElementsByTagName("interface"):
1248
# Add annotation tags
1249
for typ in ("method", "signal"):
1250
for tag in if_tag.getElementsByTagName(typ):
1251
annots = dict()
1252
for name, prop in (self.
1253
_get_all_dbus_things(typ)):
1254
if (name == tag.getAttribute("name")
1255
and prop._dbus_interface
1256
== if_tag.getAttribute("name")):
1257
annots.update(getattr(
1258
prop, "_dbus_annotations", {}))
1259
for name, value in annots.items():
1260
ann_tag = document.createElement(
1261
"annotation")
1262
ann_tag.setAttribute("name", name)
1263
ann_tag.setAttribute("value", value)
1264
tag.appendChild(ann_tag)
1265
# Add interface annotation tags
1266
for annotation, value in dict(
1267
itertools.chain.from_iterable(
1268
annotations().items()
1269
for name, annotations
1270
in self._get_all_dbus_things("interface")
1271
if name == if_tag.getAttribute("name")
1272
)).items():
1273
ann_tag = document.createElement("annotation")
1274
ann_tag.setAttribute("name", annotation)
1275
ann_tag.setAttribute("value", value)
1276
if_tag.appendChild(ann_tag)
1277
# Fix argument name for the Introspect method itself
1278
if (if_tag.getAttribute("name")
1279
== dbus.INTROSPECTABLE_IFACE):
1280
for cn in if_tag.getElementsByTagName("method"):
1281
if cn.getAttribute("name") == "Introspect":
1282
for arg in cn.getElementsByTagName("arg"):
1283
if (arg.getAttribute("direction")
1284
== "out"):
1285
arg.setAttribute("name",
1286
"xml_data")
1287
xmlstring = document.toxml("utf-8")
1288
document.unlink()
1289
except (AttributeError, xml.dom.DOMException,
1290
xml.parsers.expat.ExpatError) as error:
1291
logger.error("Failed to override Introspection method",
1292
exc_info=error)
1293
return xmlstring
1294
1295
1296
class DBusObjectWithProperties(DBusObjectWithAnnotations):
573
class DBusObjectWithProperties(dbus.service.Object):
1297
574
"""A D-Bus object with properties.
1298
575
1299
576
Classes inheriting from this can use the dbus_service_property
1300
577
decorator to expose methods as D-Bus properties. It exposes the
1301
578
standard Get(), Set(), and GetAll() methods on the D-Bus.
1302
579
"""
1303
580
581
@staticmethod
582
def _is_dbus_property(obj):
583
return getattr(obj, "_dbus_is_property", False)
584
585
def _get_all_dbus_properties(self):
586
"""Returns a generator of (name, attribute) pairs
587
"""
588
return ((prop._dbus_name, prop)
589
for name, prop in
590
inspect.getmembers(self, self._is_dbus_property))
591
1304
592
def _get_dbus_property(self, interface_name, property_name):
1305
593
"""Returns a bound method if one exists which is a D-Bus
1306
594
property with the specified name and interface.
1307
595
"""
1308
for cls in self.__class__.__mro__:
1309
for name, value in inspect.getmembers(
1310
cls, self._is_dbus_thing("property")):
1311
if (value._dbus_name == property_name
1312
and value._dbus_interface == interface_name):
1313
return value.__get__(self)
1314
596
for name in (property_name,
597
property_name + "_dbus_property"):
598
prop = getattr(self, name, None)
599
if (prop is None
600
or not self._is_dbus_property(prop)
601
or prop._dbus_name != property_name
602
or (interface_name and prop._dbus_interface
603
and interface_name != prop._dbus_interface)):
604
continue
605
return prop
1315
606
# No such property
1316
raise DBusPropertyNotFound("{}:{}.{}".format(
1317
self.dbus_object_path, interface_name, property_name))
1318
1319
@classmethod
1320
def _get_all_interface_names(cls):
1321
"""Get a sequence of all interfaces supported by an object"""
1322
return (name for name in set(getattr(getattr(x, attr),
1323
"_dbus_interface", None)
1324
for x in (inspect.getmro(cls))
1325
for attr in dir(x))
1326
if name is not None)
1327
1328
@dbus.service.method(dbus.PROPERTIES_IFACE,
1329
in_signature="ss",
607
raise DBusPropertyNotFound(self.dbus_object_path + ":"
608
+ interface_name + "."
609
+ property_name)
610
611
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1330
612
out_signature="v")
1331
613
def Get(self, interface_name, property_name):
1332
614
"""Standard D-Bus property Get() method, see D-Bus standard.
1338
620
if not hasattr(value, "variant_level"):
1339
621
return value
1340
622
return type(value)(value, variant_level=value.variant_level+1)
1341
623
1342
624
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1343
625
def Set(self, interface_name, property_name, value):
1344
626
"""Standard D-Bus property Set() method, see D-Bus standard.
1350
632
# The byte_arrays option is not supported yet on
1351
633
# signatures other than "ay".
1352
634
if prop._dbus_signature != "ay":
1353
raise ValueError("Byte arrays not supported for non-"
1354
"'ay' signature {!r}"
1355
.format(prop._dbus_signature))
1356
value = dbus.ByteArray(b''.join(chr(byte)
1357
for byte in value))
635
raise ValueError
636
value = dbus.ByteArray(''.join(unichr(byte)
637
for byte in value))
1358
638
prop(value)
1359
1360
@dbus.service.method(dbus.PROPERTIES_IFACE,
1361
in_signature="s",
639
640
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1362
641
out_signature="a{sv}")
1363
642
def GetAll(self, interface_name):
1364
643
"""Standard D-Bus property GetAll() method, see D-Bus
1366
645
1367
646
Note: Will not include properties with access="write".
1368
647
"""
1369
properties = {}
1370
for name, prop in self._get_all_dbus_things("property"):
648
all = {}
649
for name, prop in self._get_all_dbus_properties():
1371
650
if (interface_name
1372
651
and interface_name != prop._dbus_interface):
1373
652
# Interface non-empty but did not match
1377
656
continue
1378
657
value = prop()
1379
658
if not hasattr(value, "variant_level"):
1380
properties[name] = value
659
all[name] = value
1381
660
continue
1382
properties[name] = type(value)(
1383
value, variant_level=value.variant_level + 1)
1384
return dbus.Dictionary(properties, signature="sv")
1385
1386
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1387
def PropertiesChanged(self, interface_name, changed_properties,
1388
invalidated_properties):
1389
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1390
standard.
1391
"""
1392
pass
1393
661
all[name] = type(value)(value, variant_level=
662
value.variant_level+1)
663
return dbus.Dictionary(all, signature="sv")
664
1394
665
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1395
666
out_signature="s",
1396
667
path_keyword='object_path',
1397
668
connection_keyword='connection')
1398
669
def Introspect(self, object_path, connection):
1399
"""Overloading of standard D-Bus method.
1400
1401
Inserts property tags and interface annotation tags.
670
"""Standard D-Bus method, overloaded to insert property tags.
1402
671
"""
1403
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1404
object_path,
1405
connection)
672
xmlstring = dbus.service.Object.Introspect(self, object_path,
673
connection)
1406
674
try:
1407
675
document = xml.dom.minidom.parseString(xmlstring)
1408
1409
676
def make_tag(document, name, prop):
1410
677
e = document.createElement("property")
1411
678
e.setAttribute("name", name)
1412
679
e.setAttribute("type", prop._dbus_signature)
1413
680
e.setAttribute("access", prop._dbus_access)
1414
681
return e
1415
1416
682
for if_tag in document.getElementsByTagName("interface"):
1417
# Add property tags
1418
683
for tag in (make_tag(document, name, prop)
1419
684
for name, prop
1420
in self._get_all_dbus_things("property")
685
in self._get_all_dbus_properties()
1421
686
if prop._dbus_interface
1422
687
== if_tag.getAttribute("name")):
1423
688
if_tag.appendChild(tag)
1424
# Add annotation tags for properties
1425
for tag in if_tag.getElementsByTagName("property"):
1426
annots = dict()
1427
for name, prop in self._get_all_dbus_things(
1428
"property"):
1429
if (name == tag.getAttribute("name")
1430
and prop._dbus_interface
1431
== if_tag.getAttribute("name")):
1432
annots.update(getattr(
1433
prop, "_dbus_annotations", {}))
1434
for name, value in annots.items():
1435
ann_tag = document.createElement(
1436
"annotation")
1437
ann_tag.setAttribute("name", name)
1438
ann_tag.setAttribute("value", value)
1439
tag.appendChild(ann_tag)
1440
689
# Add the names to the return values for the
1441
690
# "org.freedesktop.DBus.Properties" methods
1442
691
if (if_tag.getAttribute("name")
1455
704
xmlstring = document.toxml("utf-8")
1456
705
document.unlink()
1457
706
except (AttributeError, xml.dom.DOMException,
1458
xml.parsers.expat.ExpatError) as error:
1459
logger.error("Failed to override Introspection method",
1460
exc_info=error)
1461
return xmlstring
1462
1463
try:
1464
dbus.OBJECT_MANAGER_IFACE
1465
except AttributeError:
1466
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1467
1468
1469
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1470
"""A D-Bus object with an ObjectManager.
1471
1472
Classes inheriting from this exposes the standard
1473
GetManagedObjects call and the InterfacesAdded and
1474
InterfacesRemoved signals on the standard
1475
"org.freedesktop.DBus.ObjectManager" interface.
1476
1477
Note: No signals are sent automatically; they must be sent
1478
manually.
1479
"""
1480
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1481
out_signature="a{oa{sa{sv}}}")
1482
def GetManagedObjects(self):
1483
"""This function must be overridden"""
1484
raise NotImplementedError()
1485
1486
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1487
signature="oa{sa{sv}}")
1488
def InterfacesAdded(self, object_path, interfaces_and_properties):
1489
pass
1490
1491
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1492
def InterfacesRemoved(self, object_path, interfaces):
1493
pass
1494
1495
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1496
out_signature="s",
1497
path_keyword='object_path',
1498
connection_keyword='connection')
1499
def Introspect(self, object_path, connection):
1500
"""Overloading of standard D-Bus method.
1501
1502
Override return argument name of GetManagedObjects to be
1503
"objpath_interfaces_and_properties"
1504
"""
1505
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1506
object_path,
1507
connection)
1508
try:
1509
document = xml.dom.minidom.parseString(xmlstring)
1510
1511
for if_tag in document.getElementsByTagName("interface"):
1512
# Fix argument name for the GetManagedObjects method
1513
if (if_tag.getAttribute("name")
1514
== dbus.OBJECT_MANAGER_IFACE):
1515
for cn in if_tag.getElementsByTagName("method"):
1516
if (cn.getAttribute("name")
1517
== "GetManagedObjects"):
1518
for arg in cn.getElementsByTagName("arg"):
1519
if (arg.getAttribute("direction")
1520
== "out"):
1521
arg.setAttribute(
1522
"name",
1523
"objpath_interfaces"
1524
"_and_properties")
1525
xmlstring = document.toxml("utf-8")
1526
document.unlink()
1527
except (AttributeError, xml.dom.DOMException,
1528
xml.parsers.expat.ExpatError) as error:
1529
logger.error("Failed to override Introspection method",
1530
exc_info=error)
1531
return xmlstring
1532
1533
1534
def datetime_to_dbus(dt, variant_level=0):
1535
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1536
if dt is None:
1537
return dbus.String("", variant_level=variant_level)
1538
return dbus.String(dt.isoformat(), variant_level=variant_level)
1539
1540
1541
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1542
"""A class decorator; applied to a subclass of
1543
dbus.service.Object, it will add alternate D-Bus attributes with
1544
interface names according to the "alt_interface_names" mapping.
1545
Usage:
1546
1547
@alternate_dbus_interfaces({"org.example.Interface":
1548
"net.example.AlternateInterface"})
1549
class SampleDBusObject(dbus.service.Object):
1550
@dbus.service.method("org.example.Interface")
1551
def SampleDBusMethod():
1552
pass
1553
1554
The above "SampleDBusMethod" on "SampleDBusObject" will be
1555
reachable via two interfaces: "org.example.Interface" and
1556
"net.example.AlternateInterface", the latter of which will have
1557
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1558
"true", unless "deprecate" is passed with a False value.
1559
1560
This works for methods and signals, and also for D-Bus properties
1561
(from DBusObjectWithProperties) and interfaces (from the
1562
dbus_interface_annotations decorator).
1563
"""
1564
1565
def wrapper(cls):
1566
for orig_interface_name, alt_interface_name in (
1567
alt_interface_names.items()):
1568
attr = {}
1569
interface_names = set()
1570
# Go though all attributes of the class
1571
for attrname, attribute in inspect.getmembers(cls):
1572
# Ignore non-D-Bus attributes, and D-Bus attributes
1573
# with the wrong interface name
1574
if (not hasattr(attribute, "_dbus_interface")
1575
or not attribute._dbus_interface.startswith(
1576
orig_interface_name)):
1577
continue
1578
# Create an alternate D-Bus interface name based on
1579
# the current name
1580
alt_interface = attribute._dbus_interface.replace(
1581
orig_interface_name, alt_interface_name)
1582
interface_names.add(alt_interface)
1583
# Is this a D-Bus signal?
1584
if getattr(attribute, "_dbus_is_signal", False):
1585
# Extract the original non-method undecorated
1586
# function by black magic
1587
if sys.version_info.major == 2:
1588
nonmethod_func = (dict(
1589
zip(attribute.func_code.co_freevars,
1590
attribute.__closure__))
1591
["func"].cell_contents)
1592
else:
1593
nonmethod_func = (dict(
1594
zip(attribute.__code__.co_freevars,
1595
attribute.__closure__))
1596
["func"].cell_contents)
1597
# Create a new, but exactly alike, function
1598
# object, and decorate it to be a new D-Bus signal
1599
# with the alternate D-Bus interface name
1600
new_function = copy_function(nonmethod_func)
1601
new_function = (dbus.service.signal(
1602
alt_interface,
1603
attribute._dbus_signature)(new_function))
1604
# Copy annotations, if any
1605
try:
1606
new_function._dbus_annotations = dict(
1607
attribute._dbus_annotations)
1608
except AttributeError:
1609
pass
1610
1611
# Define a creator of a function to call both the
1612
# original and alternate functions, so both the
1613
# original and alternate signals gets sent when
1614
# the function is called
1615
def fixscope(func1, func2):
1616
"""This function is a scope container to pass
1617
func1 and func2 to the "call_both" function
1618
outside of its arguments"""
1619
1620
@functools.wraps(func2)
1621
def call_both(*args, **kwargs):
1622
"""This function will emit two D-Bus
1623
signals by calling func1 and func2"""
1624
func1(*args, **kwargs)
1625
func2(*args, **kwargs)
1626
# Make wrapper function look like a D-Bus
1627
# signal
1628
for name, attr in inspect.getmembers(func2):
1629
if name.startswith("_dbus_"):
1630
setattr(call_both, name, attr)
1631
1632
return call_both
1633
# Create the "call_both" function and add it to
1634
# the class
1635
attr[attrname] = fixscope(attribute, new_function)
1636
# Is this a D-Bus method?
1637
elif getattr(attribute, "_dbus_is_method", False):
1638
# Create a new, but exactly alike, function
1639
# object. Decorate it to be a new D-Bus method
1640
# with the alternate D-Bus interface name. Add it
1641
# to the class.
1642
attr[attrname] = (
1643
dbus.service.method(
1644
alt_interface,
1645
attribute._dbus_in_signature,
1646
attribute._dbus_out_signature)
1647
(copy_function(attribute)))
1648
# Copy annotations, if any
1649
try:
1650
attr[attrname]._dbus_annotations = dict(
1651
attribute._dbus_annotations)
1652
except AttributeError:
1653
pass
1654
# Is this a D-Bus property?
1655
elif getattr(attribute, "_dbus_is_property", False):
1656
# Create a new, but exactly alike, function
1657
# object, and decorate it to be a new D-Bus
1658
# property with the alternate D-Bus interface
1659
# name. Add it to the class.
1660
attr[attrname] = (dbus_service_property(
1661
alt_interface, attribute._dbus_signature,
1662
attribute._dbus_access,
1663
attribute._dbus_get_args_options
1664
["byte_arrays"])
1665
(copy_function(attribute)))
1666
# Copy annotations, if any
1667
try:
1668
attr[attrname]._dbus_annotations = dict(
1669
attribute._dbus_annotations)
1670
except AttributeError:
1671
pass
1672
# Is this a D-Bus interface?
1673
elif getattr(attribute, "_dbus_is_interface", False):
1674
# Create a new, but exactly alike, function
1675
# object. Decorate it to be a new D-Bus interface
1676
# with the alternate D-Bus interface name. Add it
1677
# to the class.
1678
attr[attrname] = (
1679
dbus_interface_annotations(alt_interface)
1680
(copy_function(attribute)))
1681
if deprecate:
1682
# Deprecate all alternate interfaces
1683
iname = "_AlternateDBusNames_interface_annotation{}"
1684
for interface_name in interface_names:
1685
1686
@dbus_interface_annotations(interface_name)
1687
def func(self):
1688
return {"org.freedesktop.DBus.Deprecated":
1689
"true"}
1690
# Find an unused name
1691
for aname in (iname.format(i)
1692
for i in itertools.count()):
1693
if aname not in attr:
1694
attr[aname] = func
1695
break
1696
if interface_names:
1697
# Replace the class with a new subclass of it with
1698
# methods, signals, etc. as created above.
1699
if sys.version_info.major == 2:
1700
cls = type(b"{}Alternate".format(cls.__name__),
1701
(cls, ), attr)
1702
else:
1703
cls = type("{}Alternate".format(cls.__name__),
1704
(cls, ), attr)
1705
return cls
1706
1707
return wrapper
1708
1709
1710
@alternate_dbus_interfaces({"se.recompile.Mandos":
1711
"se.bsnet.fukt.Mandos"})
707
xml.parsers.expat.ExpatError), error:
708
logger.error("Failed to override Introspection method",
709
error)
710
return xmlstring
711
712
1712
713
class ClientDBus(Client, DBusObjectWithProperties):
1713
714
"""A Client class using D-Bus
1714
715
1715
716
Attributes:
1716
717
dbus_object_path: dbus.ObjectPath
1717
718
bus: dbus.SystemBus()
1718
719
"""
1719
720
1720
721
runtime_expansions = (Client.runtime_expansions
1721
+ ("dbus_object_path", ))
1722
1723
_interface = "se.recompile.Mandos.Client"
1724
722
+ ("dbus_object_path",))
723
1725
724
# dbus.service.Object doesn't use super(), so we can't either.
1726
1727
def __init__(self, bus=None, *args, **kwargs):
725
726
def __init__(self, bus = None, *args, **kwargs):
727
self._approvals_pending = 0
1728
728
self.bus = bus
1729
729
Client.__init__(self, *args, **kwargs)
1730
730
# Only now, when this client is initialized, can it show up on
1731
731
# the D-Bus
1732
client_object_name = str(self.name).translate(
732
client_object_name = unicode(self.name).translate(
1733
733
{ord("."): ord("_"),
1734
734
ord("-"): ord("_")})
1735
self.dbus_object_path = dbus.ObjectPath(
1736
"/clients/" + client_object_name)
735
self.dbus_object_path = (dbus.ObjectPath
736
("/clients/" + client_object_name))
1737
737
DBusObjectWithProperties.__init__(self, self.bus,
1738
738
self.dbus_object_path)
1739
1740
def notifychangeproperty(transform_func, dbus_name,
1741
type_func=lambda x: x,
1742
variant_level=1,
1743
invalidate_only=False,
1744
_interface=_interface):
1745
""" Modify a variable so that it's a property which announces
1746
its changes to DBus.
1747
1748
transform_fun: Function that takes a value and a variant_level
1749
and transforms it to a D-Bus type.
1750
dbus_name: D-Bus name of the variable
1751
type_func: Function that transform the value before sending it
1752
to the D-Bus. Default: no transform
1753
variant_level: D-Bus variant level. Default: 1
1754
"""
1755
attrname = "_{}".format(dbus_name)
1756
1757
def setter(self, value):
1758
if hasattr(self, "dbus_object_path"):
1759
if (not hasattr(self, attrname) or
1760
type_func(getattr(self, attrname, None))
1761
!= type_func(value)):
1762
if invalidate_only:
1763
self.PropertiesChanged(
1764
_interface, dbus.Dictionary(),
1765
dbus.Array((dbus_name, )))
1766
else:
1767
dbus_value = transform_func(
1768
type_func(value),
1769
variant_level=variant_level)
1770
self.PropertyChanged(dbus.String(dbus_name),
1771
dbus_value)
1772
self.PropertiesChanged(
1773
_interface,
1774
dbus.Dictionary({dbus.String(dbus_name):
1775
dbus_value}),
1776
dbus.Array())
1777
setattr(self, attrname, value)
1778
1779
return property(lambda self: getattr(self, attrname), setter)
1780
1781
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1782
approvals_pending = notifychangeproperty(dbus.Boolean,
1783
"ApprovalPending",
1784
type_func=bool)
1785
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1786
last_enabled = notifychangeproperty(datetime_to_dbus,
1787
"LastEnabled")
1788
checker = notifychangeproperty(
1789
dbus.Boolean, "CheckerRunning",
1790
type_func=lambda checker: checker is not None)
1791
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1792
"LastCheckedOK")
1793
last_checker_status = notifychangeproperty(dbus.Int16,
1794
"LastCheckerStatus")
1795
last_approval_request = notifychangeproperty(
1796
datetime_to_dbus, "LastApprovalRequest")
1797
approved_by_default = notifychangeproperty(dbus.Boolean,
1798
"ApprovedByDefault")
1799
approval_delay = notifychangeproperty(
1800
dbus.UInt64, "ApprovalDelay",
1801
type_func=lambda td: td.total_seconds() * 1000)
1802
approval_duration = notifychangeproperty(
1803
dbus.UInt64, "ApprovalDuration",
1804
type_func=lambda td: td.total_seconds() * 1000)
1805
host = notifychangeproperty(dbus.String, "Host")
1806
timeout = notifychangeproperty(
1807
dbus.UInt64, "Timeout",
1808
type_func=lambda td: td.total_seconds() * 1000)
1809
extended_timeout = notifychangeproperty(
1810
dbus.UInt64, "ExtendedTimeout",
1811
type_func=lambda td: td.total_seconds() * 1000)
1812
interval = notifychangeproperty(
1813
dbus.UInt64, "Interval",
1814
type_func=lambda td: td.total_seconds() * 1000)
1815
checker_command = notifychangeproperty(dbus.String, "Checker")
1816
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1817
invalidate_only=True)
1818
1819
del notifychangeproperty
1820
739
740
def _get_approvals_pending(self):
741
return self._approvals_pending
742
def _set_approvals_pending(self, value):
743
old_value = self._approvals_pending
744
self._approvals_pending = value
745
bval = bool(value)
746
if (hasattr(self, "dbus_object_path")
747
and bval is not bool(old_value)):
748
dbus_bool = dbus.Boolean(bval, variant_level=1)
749
self.PropertyChanged(dbus.String("ApprovalPending"),
750
dbus_bool)
751
752
approvals_pending = property(_get_approvals_pending,
753
_set_approvals_pending)
754
del _get_approvals_pending, _set_approvals_pending
755
756
@staticmethod
757
def _datetime_to_dbus(dt, variant_level=0):
758
"""Convert a UTC datetime.datetime() to a D-Bus type."""
759
return dbus.String(dt.isoformat(),
760
variant_level=variant_level)
761
762
def enable(self):
763
oldstate = getattr(self, "enabled", False)
764
r = Client.enable(self)
765
if oldstate != self.enabled:
766
# Emit D-Bus signals
767
self.PropertyChanged(dbus.String("Enabled"),
768
dbus.Boolean(True, variant_level=1))
769
self.PropertyChanged(
770
dbus.String("LastEnabled"),
771
self._datetime_to_dbus(self.last_enabled,
772
variant_level=1))
773
return r
774
775
def disable(self, quiet = False):
776
oldstate = getattr(self, "enabled", False)
777
r = Client.disable(self, quiet=quiet)
778
if not quiet and oldstate != self.enabled:
779
# Emit D-Bus signal
780
self.PropertyChanged(dbus.String("Enabled"),
781
dbus.Boolean(False, variant_level=1))
782
return r
783
1821
784
def __del__(self, *args, **kwargs):
1822
785
try:
1823
786
self.remove_from_connection()
1826
789
if hasattr(DBusObjectWithProperties, "__del__"):
1827
790
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1828
791
Client.__del__(self, *args, **kwargs)
1829
1830
def checker_callback(self, source, condition,
1831
connection, command, *args, **kwargs):
1832
ret = Client.checker_callback(self, source, condition,
1833
connection, command, *args,
1834
**kwargs)
1835
exitstatus = self.last_checker_status
1836
if exitstatus >= 0:
792
793
def checker_callback(self, pid, condition, command,
794
*args, **kwargs):
795
self.checker_callback_tag = None
796
self.checker = None
797
# Emit D-Bus signal
798
self.PropertyChanged(dbus.String("CheckerRunning"),
799
dbus.Boolean(False, variant_level=1))
800
if os.WIFEXITED(condition):
801
exitstatus = os.WEXITSTATUS(condition)
1837
802
# Emit D-Bus signal
1838
803
self.CheckerCompleted(dbus.Int16(exitstatus),
1839
# This is specific to GNU libC
1840
dbus.Int64(exitstatus << 8),
804
dbus.Int64(condition),
1841
805
dbus.String(command))
1842
806
else:
1843
807
# Emit D-Bus signal
1844
808
self.CheckerCompleted(dbus.Int16(-1),
1845
dbus.Int64(
1846
# This is specific to GNU libC
1847
(exitstatus << 8)
1848
| self.last_checker_signal),
809
dbus.Int64(condition),
1849
810
dbus.String(command))
1850
return ret
1851
811
812
return Client.checker_callback(self, pid, condition, command,
813
*args, **kwargs)
814
815
def checked_ok(self, *args, **kwargs):
816
r = Client.checked_ok(self, *args, **kwargs)
817
# Emit D-Bus signal
818
self.PropertyChanged(
819
dbus.String("LastCheckedOK"),
820
(self._datetime_to_dbus(self.last_checked_ok,
821
variant_level=1)))
822
return r
823
824
def need_approval(self, *args, **kwargs):
825
r = Client.need_approval(self, *args, **kwargs)
826
# Emit D-Bus signal
827
self.PropertyChanged(
828
dbus.String("LastApprovalRequest"),
829
(self._datetime_to_dbus(self.last_approval_request,
830
variant_level=1)))
831
return r
832
1852
833
def start_checker(self, *args, **kwargs):
1853
old_checker_pid = getattr(self.checker, "pid", None)
834
old_checker = self.checker
835
if self.checker is not None:
836
old_checker_pid = self.checker.pid
837
else:
838
old_checker_pid = None
1854
839
r = Client.start_checker(self, *args, **kwargs)
1855
840
# Only if new checker process was started
1856
841
if (self.checker is not None
1857
842
and old_checker_pid != self.checker.pid):
1858
843
# Emit D-Bus signal
1859
844
self.CheckerStarted(self.current_checker_command)
845
self.PropertyChanged(
846
dbus.String("CheckerRunning"),
847
dbus.Boolean(True, variant_level=1))
848
return r
849
850
def stop_checker(self, *args, **kwargs):
851
old_checker = getattr(self, "checker", None)
852
r = Client.stop_checker(self, *args, **kwargs)
853
if (old_checker is not None
854
and getattr(self, "checker", None) is None):
855
self.PropertyChanged(dbus.String("CheckerRunning"),
856
dbus.Boolean(False, variant_level=1))
1860
857
return r
1861
858
1862
859
def _reset_approved(self):
1863
self.approved = None
860
self._approved = None
1864
861
return False
1865
862
1866
863
def approve(self, value=True):
1867
self.approved = value
1868
GLib.timeout_add(int(self.approval_duration.total_seconds()
1869
* 1000), self._reset_approved)
1870
864
self.send_changedstate()
1871
1872
# D-Bus methods, signals & properties
1873
1874
# Interfaces
1875
1876
# Signals
1877
865
self._approved = value
866
gobject.timeout_add(self._timedelta_to_milliseconds
867
(self.approval_duration),
868
self._reset_approved)
869
870
871
## D-Bus methods, signals & properties
872
_interface = "se.bsnet.fukt.Mandos.Client"
873
874
## Signals
875
1878
876
# CheckerCompleted - signal
1879
877
@dbus.service.signal(_interface, signature="nxs")
1880
878
def CheckerCompleted(self, exitcode, waitstatus, command):
1881
879
"D-Bus signal"
1882
880
pass
1883
881
1884
882
# CheckerStarted - signal
1885
883
@dbus.service.signal(_interface, signature="s")
1886
884
def CheckerStarted(self, command):
1887
885
"D-Bus signal"
1888
886
pass
1889
887
1890
888
# PropertyChanged - signal
1891
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1892
889
@dbus.service.signal(_interface, signature="sv")
1893
890
def PropertyChanged(self, property, value):
1894
891
"D-Bus signal"
1895
892
pass
1896
893
1897
894
# GotSecret - signal
1898
895
@dbus.service.signal(_interface)
1899
896
def GotSecret(self):
1902
899
server to mandos-client
1903
900
"""
1904
901
pass
1905
902
1906
903
# Rejected - signal
1907
904
@dbus.service.signal(_interface, signature="s")
1908
905
def Rejected(self, reason):
1909
906
"D-Bus signal"
1910
907
pass
1911
908
1912
909
# NeedApproval - signal
1913
910
@dbus.service.signal(_interface, signature="tb")
1914
911
def NeedApproval(self, timeout, default):
1915
912
"D-Bus signal"
1916
913
return self.need_approval()
1917
1918
# Methods
1919
914
915
## Methods
916
1920
917
# Approve - method
1921
918
@dbus.service.method(_interface, in_signature="b")
1922
919
def Approve(self, value):
1923
920
self.approve(value)
1924
921
1925
922
# CheckedOK - method
1926
923
@dbus.service.method(_interface)
1927
924
def CheckedOK(self):
1928
self.checked_ok()
1929
925
return self.checked_ok()
926
1930
927
# Enable - method
1931
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1932
928
@dbus.service.method(_interface)
1933
929
def Enable(self):
1934
930
"D-Bus method"
1935
931
self.enable()
1936
932
1937
933
# StartChecker - method
1938
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1939
934
@dbus.service.method(_interface)
1940
935
def StartChecker(self):
1941
936
"D-Bus method"
1942
937
self.start_checker()
1943
938
1944
939
# Disable - method
1945
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1946
940
@dbus.service.method(_interface)
1947
941
def Disable(self):
1948
942
"D-Bus method"
1949
943
self.disable()
1950
944
1951
945
# StopChecker - method
1952
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1953
946
@dbus.service.method(_interface)
1954
947
def StopChecker(self):
1955
948
self.stop_checker()
1956
1957
# Properties
1958
949
950
## Properties
951
1959
952
# ApprovalPending - property
1960
953
@dbus_service_property(_interface, signature="b", access="read")
1961
954
def ApprovalPending_dbus_property(self):
1962
955
return dbus.Boolean(bool(self.approvals_pending))
1963
956
1964
957
# ApprovedByDefault - property
1965
@dbus_service_property(_interface,
1966
signature="b",
958
@dbus_service_property(_interface, signature="b",
1967
959
access="readwrite")
1968
960
def ApprovedByDefault_dbus_property(self, value=None):
1969
961
if value is None: # get
1970
962
return dbus.Boolean(self.approved_by_default)
1971
963
self.approved_by_default = bool(value)
1972
964
# Emit D-Bus signal
965
self.PropertyChanged(dbus.String("ApprovedByDefault"),
966
dbus.Boolean(value, variant_level=1))
967
1973
968
# ApprovalDelay - property
1974
@dbus_service_property(_interface,
1975
signature="t",
969
@dbus_service_property(_interface, signature="t",
1976
970
access="readwrite")
1977
971
def ApprovalDelay_dbus_property(self, value=None):
1978
972
if value is None: # get
1979
return dbus.UInt64(self.approval_delay.total_seconds()
1980
* 1000)
973
return dbus.UInt64(self.approval_delay_milliseconds())
1981
974
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1982
975
# Emit D-Bus signal
976
self.PropertyChanged(dbus.String("ApprovalDelay"),
977
dbus.UInt64(value, variant_level=1))
978
1983
979
# ApprovalDuration - property
1984
@dbus_service_property(_interface,
1985
signature="t",
980
@dbus_service_property(_interface, signature="t",
1986
981
access="readwrite")
1987
982
def ApprovalDuration_dbus_property(self, value=None):
1988
983
if value is None: # get
1989
return dbus.UInt64(self.approval_duration.total_seconds()
1990
* 1000)
984
return dbus.UInt64(self._timedelta_to_milliseconds(
985
self.approval_duration))
1991
986
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1992
987
# Emit D-Bus signal
988
self.PropertyChanged(dbus.String("ApprovalDuration"),
989
dbus.UInt64(value, variant_level=1))
990
1993
991
# Name - property
1994
@dbus_annotations(
1995
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1996
992
@dbus_service_property(_interface, signature="s", access="read")
1997
993
def Name_dbus_property(self):
1998
994
return dbus.String(self.name)
1999
995
2000
996
# Fingerprint - property
2001
@dbus_annotations(
2002
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2003
997
@dbus_service_property(_interface, signature="s", access="read")
2004
998
def Fingerprint_dbus_property(self):
2005
999
return dbus.String(self.fingerprint)
2006
1000
2007
1001
# Host - property
2008
@dbus_service_property(_interface,
2009
signature="s",
1002
@dbus_service_property(_interface, signature="s",
2010
1003
access="readwrite")
2011
1004
def Host_dbus_property(self, value=None):
2012
1005
if value is None: # get
2013
1006
return dbus.String(self.host)
2014
self.host = str(value)
2015
1007
self.host = value
1008
# Emit D-Bus signal
1009
self.PropertyChanged(dbus.String("Host"),
1010
dbus.String(value, variant_level=1))
1011
2016
1012
# Created - property
2017
@dbus_annotations(
2018
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2019
1013
@dbus_service_property(_interface, signature="s", access="read")
2020
1014
def Created_dbus_property(self):
2021
return datetime_to_dbus(self.created)
2022
1015
return dbus.String(self._datetime_to_dbus(self.created))
1016
2023
1017
# LastEnabled - property
2024
1018
@dbus_service_property(_interface, signature="s", access="read")
2025
1019
def LastEnabled_dbus_property(self):
2026
return datetime_to_dbus(self.last_enabled)
2027
1020
if self.last_enabled is None:
1021
return dbus.String("")
1022
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1023
2028
1024
# Enabled - property
2029
@dbus_service_property(_interface,
2030
signature="b",
1025
@dbus_service_property(_interface, signature="b",
2031
1026
access="readwrite")
2032
1027
def Enabled_dbus_property(self, value=None):
2033
1028
if value is None: # get
2036
1031
self.enable()
2037
1032
else:
2038
1033
self.disable()
2039
1034
2040
1035
# LastCheckedOK - property
2041
@dbus_service_property(_interface,
2042
signature="s",
1036
@dbus_service_property(_interface, signature="s",
2043
1037
access="readwrite")
2044
1038
def LastCheckedOK_dbus_property(self, value=None):
2045
1039
if value is not None:
2046
1040
self.checked_ok()
2047
1041
return
2048
return datetime_to_dbus(self.last_checked_ok)
2049
2050
# LastCheckerStatus - property
2051
@dbus_service_property(_interface, signature="n", access="read")
2052
def LastCheckerStatus_dbus_property(self):
2053
return dbus.Int16(self.last_checker_status)
2054
2055
# Expires - property
2056
@dbus_service_property(_interface, signature="s", access="read")
2057
def Expires_dbus_property(self):
2058
return datetime_to_dbus(self.expires)
2059
1042
if self.last_checked_ok is None:
1043
return dbus.String("")
1044
return dbus.String(self._datetime_to_dbus(self
1045
.last_checked_ok))
1046
2060
1047
# LastApprovalRequest - property
2061
1048
@dbus_service_property(_interface, signature="s", access="read")
2062
1049
def LastApprovalRequest_dbus_property(self):
2063
return datetime_to_dbus(self.last_approval_request)
2064
1050
if self.last_approval_request is None:
1051
return dbus.String("")
1052
return dbus.String(self.
1053
_datetime_to_dbus(self
1054
.last_approval_request))
1055
2065
1056
# Timeout - property
2066
@dbus_service_property(_interface,
2067
signature="t",
1057
@dbus_service_property(_interface, signature="t",
2068
1058
access="readwrite")
2069
1059
def Timeout_dbus_property(self, value=None):
2070
1060
if value is None: # get
2071
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2072
old_timeout = self.timeout
1061
return dbus.UInt64(self.timeout_milliseconds())
2073
1062
self.timeout = datetime.timedelta(0, 0, 0, value)
2074
# Reschedule disabling
2075
if self.enabled:
2076
now = datetime.datetime.utcnow()
2077
self.expires += self.timeout - old_timeout
2078
if self.expires <= now:
2079
# The timeout has passed
2080
self.disable()
2081
else:
2082
if (getattr(self, "disable_initiator_tag", None)
2083
is None):
2084
return
2085
GLib.source_remove(self.disable_initiator_tag)
2086
self.disable_initiator_tag = GLib.timeout_add(
2087
int((self.expires - now).total_seconds() * 1000),
2088
self.disable)
2089
2090
# ExtendedTimeout - property
2091
@dbus_service_property(_interface,
2092
signature="t",
2093
access="readwrite")
2094
def ExtendedTimeout_dbus_property(self, value=None):
2095
if value is None: # get
2096
return dbus.UInt64(self.extended_timeout.total_seconds()
2097
* 1000)
2098
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2099
1063
# Emit D-Bus signal
1064
self.PropertyChanged(dbus.String("Timeout"),
1065
dbus.UInt64(value, variant_level=1))
1066
if getattr(self, "disable_initiator_tag", None) is None:
1067
return
1068
# Reschedule timeout
1069
gobject.source_remove(self.disable_initiator_tag)
1070
self.disable_initiator_tag = None
1071
time_to_die = (self.
1072
_timedelta_to_milliseconds((self
1073
.last_checked_ok
1074
+ self.timeout)
1075
- datetime.datetime
1076
.utcnow()))
1077
if time_to_die <= 0:
1078
# The timeout has passed
1079
self.disable()
1080
else:
1081
self.disable_initiator_tag = (gobject.timeout_add
1082
(time_to_die, self.disable))
1083
2100
1084
# Interval - property
2101
@dbus_service_property(_interface,
2102
signature="t",
1085
@dbus_service_property(_interface, signature="t",
2103
1086
access="readwrite")
2104
1087
def Interval_dbus_property(self, value=None):
2105
1088
if value is None: # get
2106
return dbus.UInt64(self.interval.total_seconds() * 1000)
1089
return dbus.UInt64(self.interval_milliseconds())
2107
1090
self.interval = datetime.timedelta(0, 0, 0, value)
1091
# Emit D-Bus signal
1092
self.PropertyChanged(dbus.String("Interval"),
1093
dbus.UInt64(value, variant_level=1))
2108
1094
if getattr(self, "checker_initiator_tag", None) is None:
2109
1095
return
2110
if self.enabled:
2111
# Reschedule checker run
2112
GLib.source_remove(self.checker_initiator_tag)
2113
self.checker_initiator_tag = GLib.timeout_add(
2114
value, self.start_checker)
2115
self.start_checker() # Start one now, too
1096
# Reschedule checker run
1097
gobject.source_remove(self.checker_initiator_tag)
1098
self.checker_initiator_tag = (gobject.timeout_add
1099
(value, self.start_checker))
1100
self.start_checker() # Start one now, too
2116
1101
2117
1102
# Checker - property
2118
@dbus_service_property(_interface,
2119
signature="s",
1103
@dbus_service_property(_interface, signature="s",
2120
1104
access="readwrite")
2121
1105
def Checker_dbus_property(self, value=None):
2122
1106
if value is None: # get
2123
1107
return dbus.String(self.checker_command)
2124
self.checker_command = str(value)
2125
1108
self.checker_command = value
1109
# Emit D-Bus signal
1110
self.PropertyChanged(dbus.String("Checker"),
1111
dbus.String(self.checker_command,
1112
variant_level=1))
1113
2126
1114
# CheckerRunning - property
2127
@dbus_service_property(_interface,
2128
signature="b",
1115
@dbus_service_property(_interface, signature="b",
2129
1116
access="readwrite")
2130
1117
def CheckerRunning_dbus_property(self, value=None):
2131
1118
if value is None: # get
2134
1121
self.start_checker()
2135
1122
else:
2136
1123
self.stop_checker()
2137
1124
2138
1125
# ObjectPath - property
2139
@dbus_annotations(
2140
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2141
"org.freedesktop.DBus.Deprecated": "true"})
2142
1126
@dbus_service_property(_interface, signature="o", access="read")
2143
1127
def ObjectPath_dbus_property(self):
2144
return self.dbus_object_path # is already a dbus.ObjectPath
2145
1128
return self.dbus_object_path # is already a dbus.ObjectPath
1129
2146
1130
# Secret = property
2147
@dbus_annotations(
2148
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2149
"invalidates"})
2150
@dbus_service_property(_interface,
2151
signature="ay",
2152
access="write",
2153
byte_arrays=True)
1131
@dbus_service_property(_interface, signature="ay",
1132
access="write", byte_arrays=True)
2154
1133
def Secret_dbus_property(self, value):
2155
self.secret = bytes(value)
2156
1134
self.secret = str(value)
1135
2157
1136
del _interface
2158
1137
2159
1138
2162
1141
self._pipe = child_pipe
2163
1142
self._pipe.send(('init', fpr, address))
2164
1143
if not self._pipe.recv():
2165
raise KeyError(fpr)
1144
raise KeyError()
2166
1145
2167
1146
def __getattribute__(self, name):
2168
if name == '_pipe':
1147
if(name == '_pipe'):
2169
1148
return super(ProxyClient, self).__getattribute__(name)
2170
1149
self._pipe.send(('getattr', name))
2171
1150
data = self._pipe.recv()
2172
1151
if data[0] == 'data':
2173
1152
return data[1]
2174
1153
if data[0] == 'function':
2175
2176
1154
def func(*args, **kwargs):
2177
1155
self._pipe.send(('funcall', name, args, kwargs))
2178
1156
return self._pipe.recv()[1]
2179
2180
1157
return func
2181
1158
2182
1159
def __setattr__(self, name, value):
2183
if name == '_pipe':
1160
if(name == '_pipe'):
2184
1161
return super(ProxyClient, self).__setattr__(name, value)
2185
1162
self._pipe.send(('setattr', name, value))
2186
1163
2187
1164
2188
1165
class ClientHandler(socketserver.BaseRequestHandler, object):
2189
1166
"""A class to handle client connections.
2190
1167
2191
1168
Instantiated once for each connection to handle it.
2192
1169
Note: This will run in its own forked process."""
2193
1170
2194
1171
def handle(self):
2195
1172
with contextlib.closing(self.server.child_pipe) as child_pipe:
2196
1173
logger.info("TCP connection from: %s",
2197
str(self.client_address))
1174
unicode(self.client_address))
2198
1175
logger.debug("Pipe FD: %d",
2199
1176
self.server.child_pipe.fileno())
2200
1177
2201
session = gnutls.ClientSession(self.request)
2202
2203
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2204
# "+AES-256-CBC", "+SHA1",
2205
# "+COMP-NULL", "+CTYPE-OPENPGP",
2206
# "+DHE-DSS"))
1178
session = (gnutls.connection
1179
.ClientSession(self.request,
1180
gnutls.connection
1181
.X509Credentials()))
1182
1183
# Note: gnutls.connection.X509Credentials is really a
1184
# generic GnuTLS certificate credentials object so long as
1185
# no X.509 keys are added to it. Therefore, we can use it
1186
# here despite using OpenPGP certificates.
1187
1188
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1189
# "+AES-256-CBC", "+SHA1",
1190
# "+COMP-NULL", "+CTYPE-OPENPGP",
1191
# "+DHE-DSS"))
2207
1192
# Use a fallback default, since this MUST be set.
2208
1193
priority = self.server.gnutls_priority
2209
1194
if priority is None:
2210
1195
priority = "NORMAL"
2211
gnutls.priority_set_direct(session._c_object,
2212
priority.encode("utf-8"),
2213
None)
1196
(gnutls.library.functions
1197
.gnutls_priority_set_direct(session._c_object,
1198
priority, None))
2214
1199
2215
1200
# Start communication using the Mandos protocol
2216
1201
# Get protocol number
2218
1203
logger.debug("Protocol version: %r", line)
2219
1204
try:
2220
1205
if int(line.strip().split()[0]) > 1:
2221
raise RuntimeError(line)
2222
except (ValueError, IndexError, RuntimeError) as error:
1206
raise RuntimeError
1207
except (ValueError, IndexError, RuntimeError), error:
2223
1208
logger.error("Unknown protocol version: %s", error)
2224
1209
return
2225
1210
2226
1211
# Start GnuTLS connection
2227
1212
try:
2228
1213
session.handshake()
2229
except gnutls.Error as error:
1214
except gnutls.errors.GNUTLSError, error:
2230
1215
logger.warning("Handshake failed: %s", error)
2231
1216
# Do not run session.bye() here: the session is not
2232
1217
# established. Just abandon the request.
2236
1221
approval_required = False
2237
1222
try:
2238
1223
try:
2239
fpr = self.fingerprint(
2240
self.peer_certificate(session))
2241
except (TypeError, gnutls.Error) as error:
1224
fpr = self.fingerprint(self.peer_certificate
1225
(session))
1226
except (TypeError, gnutls.errors.GNUTLSError), error:
2242
1227
logger.warning("Bad certificate: %s", error)
2243
1228
return
2244
1229
logger.debug("Fingerprint: %s", fpr)
2248
1233
self.client_address)
2249
1234
except KeyError:
2250
1235
return
2251
1236
2252
1237
if client.approval_delay:
2253
1238
delay = client.approval_delay
2254
1239
client.approvals_pending += 1
2255
1240
approval_required = True
2256
1241
2257
1242
while True:
2258
1243
if not client.enabled:
2259
logger.info("Client %s is disabled",
2260
client.name)
1244
logger.warning("Client %s is disabled",
1245
client.name)
2261
1246
if self.server.use_dbus:
2262
1247
# Emit D-Bus signal
2263
client.Rejected("Disabled")
1248
client.Rejected("Disabled")
2264
1249
return
2265
2266
if client.approved or not client.approval_delay:
2267
# We are approved or approval is disabled
1250
1251
if client._approved or not client.approval_delay:
1252
#We are approved or approval is disabled
2268
1253
break
2269
elif client.approved is None:
1254
elif client._approved is None:
2270
1255
logger.info("Client %s needs approval",
2271
1256
client.name)
2272
1257
if self.server.use_dbus:
2273
1258
# Emit D-Bus signal
2274
1259
client.NeedApproval(
2275
client.approval_delay.total_seconds()
2276
* 1000, client.approved_by_default)
1260
client.approval_delay_milliseconds(),
1261
client.approved_by_default)
2277
1262
else:
2278
1263
logger.warning("Client %s was not approved",
2279
1264
client.name)
2281
1266
# Emit D-Bus signal
2282
1267
client.Rejected("Denied")
2283
1268
return
2284
2285
# wait until timeout or approved
1269
1270
#wait until timeout or approved
1271
#x = float(client._timedelta_to_milliseconds(delay))
2286
1272
time = datetime.datetime.now()
2287
1273
client.changedstate.acquire()
2288
client.changedstate.wait(delay.total_seconds())
1274
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
2289
1275
client.changedstate.release()
2290
1276
time2 = datetime.datetime.now()
2291
1277
if (time2 - time) >= delay:
2301
1287
break
2302
1288
else:
2303
1289
delay -= time2 - time
2304
2305
try:
2306
session.send(client.secret)
2307
except gnutls.Error as error:
2308
logger.warning("gnutls send failed",
2309
exc_info=error)
2310
return
1290
1291
sent_size = 0
1292
while sent_size < len(client.secret):
1293
try:
1294
sent = session.send(client.secret[sent_size:])
1295
except (gnutls.errors.GNUTLSError), error:
1296
logger.warning("gnutls send failed")
1297
return
1298
logger.debug("Sent: %d, remaining: %d",
1299
sent, len(client.secret)
1300
- (sent_size + sent))
1301
sent_size += sent
2311
1302
2312
1303
logger.info("Sending secret to %s", client.name)
2313
# bump the timeout using extended_timeout
2314
client.bump_timeout(client.extended_timeout)
1304
# bump the timeout as if seen
1305
client.checked_ok()
2315
1306
if self.server.use_dbus:
2316
1307
# Emit D-Bus signal
2317
1308
client.GotSecret()
2318
1309
2319
1310
finally:
2320
1311
if approval_required:
2321
1312
client.approvals_pending -= 1
2322
1313
try:
2323
1314
session.bye()
2324
except gnutls.Error as error:
2325
logger.warning("GnuTLS bye failed",
2326
exc_info=error)
2327
1315
except (gnutls.errors.GNUTLSError), error:
1316
logger.warning("GnuTLS bye failed")
1317
2328
1318
@staticmethod
2329
1319
def peer_certificate(session):
2330
1320
"Return the peer's OpenPGP certificate as a bytestring"
2331
1321
# If not an OpenPGP certificate...
2332
if (gnutls.certificate_type_get(session._c_object)
2333
!= gnutls.CRT_OPENPGP):
2334
# ...return invalid data
2335
return b""
1322
if (gnutls.library.functions
1323
.gnutls_certificate_type_get(session._c_object)
1324
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1325
# ...do the normal thing
1326
return session.peer_certificate
2336
1327
list_size = ctypes.c_uint(1)
2337
cert_list = (gnutls.certificate_get_peers
1328
cert_list = (gnutls.library.functions
1329
.gnutls_certificate_get_peers
2338
1330
(session._c_object, ctypes.byref(list_size)))
2339
1331
if not bool(cert_list) and list_size.value != 0:
2340
raise gnutls.Error("error getting peer certificate")
1332
raise gnutls.errors.GNUTLSError("error getting peer"
1333
" certificate")
2341
1334
if list_size.value == 0:
2342
1335
return None
2343
1336
cert = cert_list[0]
2344
1337
return ctypes.string_at(cert.data, cert.size)
2345
1338
2346
1339
@staticmethod
2347
1340
def fingerprint(openpgp):
2348
1341
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2349
1342
# New GnuTLS "datum" with the OpenPGP public key
2350
datum = gnutls.datum_t(
2351
ctypes.cast(ctypes.c_char_p(openpgp),
2352
ctypes.POINTER(ctypes.c_ubyte)),
2353
ctypes.c_uint(len(openpgp)))
1343
datum = (gnutls.library.types
1344
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1345
ctypes.POINTER
1346
(ctypes.c_ubyte)),
1347
ctypes.c_uint(len(openpgp))))
2354
1348
# New empty GnuTLS certificate
2355
crt = gnutls.openpgp_crt_t()
2356
gnutls.openpgp_crt_init(ctypes.byref(crt))
1349
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1350
(gnutls.library.functions
1351
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2357
1352
# Import the OpenPGP public key into the certificate
2358
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2359
gnutls.OPENPGP_FMT_RAW)
1353
(gnutls.library.functions
1354
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1355
gnutls.library.constants
1356
.GNUTLS_OPENPGP_FMT_RAW))
2360
1357
# Verify the self signature in the key
2361
1358
crtverify = ctypes.c_uint()
2362
gnutls.openpgp_crt_verify_self(crt, 0,
2363
ctypes.byref(crtverify))
1359
(gnutls.library.functions
1360
.gnutls_openpgp_crt_verify_self(crt, 0,
1361
ctypes.byref(crtverify)))
2364
1362
if crtverify.value != 0:
2365
gnutls.openpgp_crt_deinit(crt)
2366
raise gnutls.CertificateSecurityError("Verify failed")
1363
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1364
raise (gnutls.errors.CertificateSecurityError
1365
("Verify failed"))
2367
1366
# New buffer for the fingerprint
2368
1367
buf = ctypes.create_string_buffer(20)
2369
1368
buf_len = ctypes.c_size_t()
2370
1369
# Get the fingerprint from the certificate into the buffer
2371
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2372
ctypes.byref(buf_len))
1370
(gnutls.library.functions
1371
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1372
ctypes.byref(buf_len)))
2373
1373
# Deinit the certificate
2374
gnutls.openpgp_crt_deinit(crt)
1374
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2375
1375
# Convert the buffer to a Python bytestring
2376
1376
fpr = ctypes.string_at(buf, buf_len.value)
2377
1377
# Convert the bytestring to hexadecimal notation
2378
hex_fpr = binascii.hexlify(fpr).upper()
1378
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2379
1379
return hex_fpr
2380
1380
2381
1381
2382
1382
class MultiprocessingMixIn(object):
2383
1383
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2384
2385
1384
def sub_process_main(self, request, address):
2386
1385
try:
2387
1386
self.finish_request(request, address)
2388
except Exception:
1387
except:
2389
1388
self.handle_error(request, address)
2390
1389
self.close_request(request)
2391
1390
2392
1391
def process_request(self, request, address):
2393
1392
"""Start a new process to process the request."""
2394
proc = multiprocessing.Process(target=self.sub_process_main,
2395
args=(request, address))
2396
proc.start()
2397
return proc
2398
1393
multiprocessing.Process(target = self.sub_process_main,
1394
args = (request, address)).start()
2399
1395
2400
1396
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2401
1397
""" adds a pipe to the MixIn """
2402
2403
1398
def process_request(self, request, client_address):
2404
1399
"""Overrides and wraps the original process_request().
2405
1400
2406
1401
This function creates a new pipe in self.pipe
2407
1402
"""
2408
1403
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2409
1404
2410
proc = MultiprocessingMixIn.process_request(self, request,
2411
client_address)
1405
super(MultiprocessingMixInWithPipe,
1406
self).process_request(request, client_address)
2412
1407
self.child_pipe.close()
2413
self.add_pipe(parent_pipe, proc)
1408
self.add_pipe(parent_pipe)
2414
1409
2415
def add_pipe(self, parent_pipe, proc):
1410
def add_pipe(self, parent_pipe):
2416
1411
"""Dummy function; override as necessary"""
2417
raise NotImplementedError()
2418
1412
raise NotImplementedError
2419
1413
2420
1414
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2421
1415
socketserver.TCPServer, object):
2422
1416
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2423
1417
2424
1418
Attributes:
2425
1419
enabled: Boolean; whether this server is activated yet
2426
1420
interface: None or a network interface name (string)
2427
1421
use_ipv6: Boolean; to use IPv6 or not
2428
1422
"""
2429
2430
1423
def __init__(self, server_address, RequestHandlerClass,
2431
interface=None,
2432
use_ipv6=True,
2433
socketfd=None):
2434
"""If socketfd is set, use that file descriptor instead of
2435
creating a new one with socket.socket().
2436
"""
1424
interface=None, use_ipv6=True):
2437
1425
self.interface = interface
2438
1426
if use_ipv6:
2439
1427
self.address_family = socket.AF_INET6
2440
if socketfd is not None:
2441
# Save the file descriptor
2442
self.socketfd = socketfd
2443
# Save the original socket.socket() function
2444
self.socket_socket = socket.socket
2445
2446
# To implement --socket, we monkey patch socket.socket.
2447
#
2448
# (When socketserver.TCPServer is a new-style class, we
2449
# could make self.socket into a property instead of monkey
2450
# patching socket.socket.)
2451
#
2452
# Create a one-time-only replacement for socket.socket()
2453
@functools.wraps(socket.socket)
2454
def socket_wrapper(*args, **kwargs):
2455
# Restore original function so subsequent calls are
2456
# not affected.
2457
socket.socket = self.socket_socket
2458
del self.socket_socket
2459
# This time only, return a new socket object from the
2460
# saved file descriptor.
2461
return socket.fromfd(self.socketfd, *args, **kwargs)
2462
# Replace socket.socket() function with wrapper
2463
socket.socket = socket_wrapper
2464
# The socketserver.TCPServer.__init__ will call
2465
# socket.socket(), which might be our replacement,
2466
# socket_wrapper(), if socketfd was set.
2467
1428
socketserver.TCPServer.__init__(self, server_address,
2468
1429
RequestHandlerClass)
2469
2470
1430
def server_bind(self):
2471
1431
"""This overrides the normal server_bind() function
2472
1432
to bind to an interface if one was specified, and also NOT to
2473
1433
bind to an address or port if they were not specified."""
2474
global SO_BINDTODEVICE
2475
1434
if self.interface is not None:
2476
1435
if SO_BINDTODEVICE is None:
2477
# Fall back to a hard-coded value which seems to be
2478
# common enough.
2479
logger.warning("SO_BINDTODEVICE not found, trying 25")
2480
SO_BINDTODEVICE = 25
2481
try:
2482
self.socket.setsockopt(
2483
socket.SOL_SOCKET, SO_BINDTODEVICE,
2484
(self.interface + "\0").encode("utf-8"))
2485
except socket.error as error:
2486
if error.errno == errno.EPERM:
2487
logger.error("No permission to bind to"
2488
" interface %s", self.interface)
2489
elif error.errno == errno.ENOPROTOOPT:
2490
logger.error("SO_BINDTODEVICE not available;"
2491
" cannot bind to interface %s",
2492
self.interface)
2493
elif error.errno == errno.ENODEV:
2494
logger.error("Interface %s does not exist,"
2495
" cannot bind", self.interface)
2496
else:
2497
raise
1436
logger.error("SO_BINDTODEVICE does not exist;"
1437
" cannot bind to interface %s",
1438
self.interface)
1439
else:
1440
try:
1441
self.socket.setsockopt(socket.SOL_SOCKET,
1442
SO_BINDTODEVICE,
1443
str(self.interface
1444
+ '\0'))
1445
except socket.error, error:
1446
if error[0] == errno.EPERM:
1447
logger.error("No permission to"
1448
" bind to interface %s",
1449
self.interface)
1450
elif error[0] == errno.ENOPROTOOPT:
1451
logger.error("SO_BINDTODEVICE not available;"
1452
" cannot bind to interface %s",
1453
self.interface)
1454
else:
1455
raise
2498
1456
# Only bind(2) the socket if we really need to.
2499
1457
if self.server_address[0] or self.server_address[1]:
2500
1458
if not self.server_address[0]:
2501
1459
if self.address_family == socket.AF_INET6:
2502
any_address = "::" # in6addr_any
1460
any_address = "::" # in6addr_any
2503
1461
else:
2504
any_address = "0.0.0.0" # INADDR_ANY
1462
any_address = socket.INADDR_ANY
2505
1463
self.server_address = (any_address,
2506
1464
self.server_address[1])
2507
1465
elif not self.server_address[1]:
2508
self.server_address = (self.server_address[0], 0)
1466
self.server_address = (self.server_address[0],
1467
0)
2509
1468
# if self.interface:
2510
1469
# self.server_address = (self.server_address[0],
2511
1470
# 0, # port
2517
1476
2518
1477
class MandosServer(IPv6_TCPServer):
2519
1478
"""Mandos server.
2520
1479
2521
1480
Attributes:
2522
1481
clients: set of Client objects
2523
1482
gnutls_priority GnuTLS priority string
2524
1483
use_dbus: Boolean; to emit D-Bus signals or not
2525
2526
Assumes a GLib.MainLoop event loop.
1484
1485
Assumes a gobject.MainLoop event loop.
2527
1486
"""
2528
2529
1487
def __init__(self, server_address, RequestHandlerClass,
2530
interface=None,
2531
use_ipv6=True,
2532
clients=None,
2533
gnutls_priority=None,
2534
use_dbus=True,
2535
socketfd=None):
1488
interface=None, use_ipv6=True, clients=None,
1489
gnutls_priority=None, use_dbus=True):
2536
1490
self.enabled = False
2537
1491
self.clients = clients
2538
1492
if self.clients is None:
2539
self.clients = {}
1493
self.clients = set()
2540
1494
self.use_dbus = use_dbus
2541
1495
self.gnutls_priority = gnutls_priority
2542
1496
IPv6_TCPServer.__init__(self, server_address,
2543
1497
RequestHandlerClass,
2544
interface=interface,
2545
use_ipv6=use_ipv6,
2546
socketfd=socketfd)
2547
1498
interface = interface,
1499
use_ipv6 = use_ipv6)
2548
1500
def server_activate(self):
2549
1501
if self.enabled:
2550
1502
return socketserver.TCPServer.server_activate(self)
2551
2552
1503
def enable(self):
2553
1504
self.enabled = True
2554
2555
def add_pipe(self, parent_pipe, proc):
1505
def add_pipe(self, parent_pipe):
2556
1506
# Call "handle_ipc" for both data and EOF events
2557
GLib.io_add_watch(
2558
parent_pipe.fileno(),
2559
GLib.IO_IN | GLib.IO_HUP,
2560
functools.partial(self.handle_ipc,
2561
parent_pipe=parent_pipe,
2562
proc=proc))
2563
2564
def handle_ipc(self, source, condition,
2565
parent_pipe=None,
2566
proc=None,
1507
gobject.io_add_watch(parent_pipe.fileno(),
1508
gobject.IO_IN | gobject.IO_HUP,
1509
functools.partial(self.handle_ipc,
1510
parent_pipe = parent_pipe))
1511
1512
def handle_ipc(self, source, condition, parent_pipe=None,
2567
1513
client_object=None):
2568
# error, or the other end of multiprocessing.Pipe has closed
2569
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2570
# Wait for other process to exit
2571
proc.join()
1514
condition_names = {
1515
gobject.IO_IN: "IN", # There is data to read.
1516
gobject.IO_OUT: "OUT", # Data can be written (without
1517
# blocking).
1518
gobject.IO_PRI: "PRI", # There is urgent data to read.
1519
gobject.IO_ERR: "ERR", # Error condition.
1520
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1521
# broken, usually for pipes and
1522
# sockets).
1523
}
1524
conditions_string = ' | '.join(name
1525
for cond, name in
1526
condition_names.iteritems()
1527
if cond & condition)
1528
# error or the other end of multiprocessing.Pipe has closed
1529
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2572
1530
return False
2573
1531
2574
1532
# Read a request from the child
2575
1533
request = parent_pipe.recv()
2576
1534
command = request[0]
2577
1535
2578
1536
if command == 'init':
2579
1537
fpr = request[1]
2580
1538
address = request[2]
2581
2582
for c in self.clients.values():
1539
1540
for c in self.clients:
2583
1541
if c.fingerprint == fpr:
2584
1542
client = c
2585
1543
break
2586
1544
else:
2587
logger.info("Client not found for fingerprint: %s, ad"
2588
"dress: %s", fpr, address)
1545
logger.warning("Client not found for fingerprint: %s, ad"
1546
"dress: %s", fpr, address)
2589
1547
if self.use_dbus:
2590
1548
# Emit D-Bus signal
2591
mandos_dbus_service.ClientNotFound(fpr,
2592
address[0])
1549
mandos_dbus_service.ClientNotFound(fpr, address[0])
2593
1550
parent_pipe.send(False)
2594
1551
return False
2595
2596
GLib.io_add_watch(
2597
parent_pipe.fileno(),
2598
GLib.IO_IN | GLib.IO_HUP,
2599
functools.partial(self.handle_ipc,
2600
parent_pipe=parent_pipe,
2601
proc=proc,
2602
client_object=client))
1552
1553
gobject.io_add_watch(parent_pipe.fileno(),
1554
gobject.IO_IN | gobject.IO_HUP,
1555
functools.partial(self.handle_ipc,
1556
parent_pipe = parent_pipe,
1557
client_object = client))
2603
1558
parent_pipe.send(True)
2604
# remove the old hook in favor of the new above hook on
2605
# same fileno
1559
# remove the old hook in favor of the new above hook on same fileno
2606
1560
return False
2607
1561
if command == 'funcall':
2608
1562
funcname = request[1]
2609
1563
args = request[2]
2610
1564
kwargs = request[3]
2611
2612
parent_pipe.send(('data', getattr(client_object,
2613
funcname)(*args,
2614
**kwargs)))
1565
1566
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
2615
1567
2616
1568
if command == 'getattr':
2617
1569
attrname = request[1]
2618
if isinstance(client_object.__getattribute__(attrname),
2619
collections.Callable):
2620
parent_pipe.send(('function', ))
1570
if callable(client_object.__getattribute__(attrname)):
1571
parent_pipe.send(('function',))
2621
1572
else:
2622
parent_pipe.send((
2623
'data', client_object.__getattribute__(attrname)))
2624
1573
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1574
2625
1575
if command == 'setattr':
2626
1576
attrname = request[1]
2627
1577
value = request[2]
2630
1580
return True
2631
1581
2632
1582
2633
def rfc3339_duration_to_delta(duration):
2634
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2635
2636
>>> rfc3339_duration_to_delta("P7D")
2637
datetime.timedelta(7)
2638
>>> rfc3339_duration_to_delta("PT60S")
2639
datetime.timedelta(0, 60)
2640
>>> rfc3339_duration_to_delta("PT60M")
2641
datetime.timedelta(0, 3600)
2642
>>> rfc3339_duration_to_delta("PT24H")
2643
datetime.timedelta(1)
2644
>>> rfc3339_duration_to_delta("P1W")
2645
datetime.timedelta(7)
2646
>>> rfc3339_duration_to_delta("PT5M30S")
2647
datetime.timedelta(0, 330)
2648
>>> rfc3339_duration_to_delta("P1DT3M20S")
2649
datetime.timedelta(1, 200)
2650
"""
2651
2652
# Parsing an RFC 3339 duration with regular expressions is not
2653
# possible - there would have to be multiple places for the same
2654
# values, like seconds. The current code, while more esoteric, is
2655
# cleaner without depending on a parsing library. If Python had a
2656
# built-in library for parsing we would use it, but we'd like to
2657
# avoid excessive use of external libraries.
2658
2659
# New type for defining tokens, syntax, and semantics all-in-one
2660
Token = collections.namedtuple("Token", (
2661
"regexp", # To match token; if "value" is not None, must have
2662
# a "group" containing digits
2663
"value", # datetime.timedelta or None
2664
"followers")) # Tokens valid after this token
2665
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2666
# the "duration" ABNF definition in RFC 3339, Appendix A.
2667
token_end = Token(re.compile(r"$"), None, frozenset())
2668
token_second = Token(re.compile(r"(\d+)S"),
2669
datetime.timedelta(seconds=1),
2670
frozenset((token_end, )))
2671
token_minute = Token(re.compile(r"(\d+)M"),
2672
datetime.timedelta(minutes=1),
2673
frozenset((token_second, token_end)))
2674
token_hour = Token(re.compile(r"(\d+)H"),
2675
datetime.timedelta(hours=1),
2676
frozenset((token_minute, token_end)))
2677
token_time = Token(re.compile(r"T"),
2678
None,
2679
frozenset((token_hour, token_minute,
2680
token_second)))
2681
token_day = Token(re.compile(r"(\d+)D"),
2682
datetime.timedelta(days=1),
2683
frozenset((token_time, token_end)))
2684
token_month = Token(re.compile(r"(\d+)M"),
2685
datetime.timedelta(weeks=4),
2686
frozenset((token_day, token_end)))
2687
token_year = Token(re.compile(r"(\d+)Y"),
2688
datetime.timedelta(weeks=52),
2689
frozenset((token_month, token_end)))
2690
token_week = Token(re.compile(r"(\d+)W"),
2691
datetime.timedelta(weeks=1),
2692
frozenset((token_end, )))
2693
token_duration = Token(re.compile(r"P"), None,
2694
frozenset((token_year, token_month,
2695
token_day, token_time,
2696
token_week)))
2697
# Define starting values:
2698
# Value so far
2699
value = datetime.timedelta()
2700
found_token = None
2701
# Following valid tokens
2702
followers = frozenset((token_duration, ))
2703
# String left to parse
2704
s = duration
2705
# Loop until end token is found
2706
while found_token is not token_end:
2707
# Search for any currently valid tokens
2708
for token in followers:
2709
match = token.regexp.match(s)
2710
if match is not None:
2711
# Token found
2712
if token.value is not None:
2713
# Value found, parse digits
2714
factor = int(match.group(1), 10)
2715
# Add to value so far
2716
value += factor * token.value
2717
# Strip token from string
2718
s = token.regexp.sub("", s, 1)
2719
# Go to found token
2720
found_token = token
2721
# Set valid next tokens
2722
followers = found_token.followers
2723
break
2724
else:
2725
# No currently valid tokens were found
2726
raise ValueError("Invalid RFC 3339 duration: {!r}"
2727
.format(duration))
2728
# End token found
2729
return value
2730
2731
2732
1583
def string_to_delta(interval):
2733
1584
"""Parse a string and return a datetime.timedelta
2734
1585
2735
1586
>>> string_to_delta('7d')
2736
1587
datetime.timedelta(7)
2737
1588
>>> string_to_delta('60s')
2745
1596
>>> string_to_delta('5m 30s')
2746
1597
datetime.timedelta(0, 330)
2747
1598
"""
2748
2749
try:
2750
return rfc3339_duration_to_delta(interval)
2751
except ValueError:
2752
pass
2753
2754
1599
timevalue = datetime.timedelta(0)
2755
1600
for s in interval.split():
2756
1601
try:
2757
suffix = s[-1]
1602
suffix = unicode(s[-1])
2758
1603
value = int(s[:-1])
2759
1604
if suffix == "d":
2760
1605
delta = datetime.timedelta(value)
2767
1612
elif suffix == "w":
2768
1613
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2769
1614
else:
2770
raise ValueError("Unknown suffix {!r}".format(suffix))
2771
except IndexError as e:
1615
raise ValueError("Unknown suffix %r" % suffix)
1616
except (ValueError, IndexError), e:
2772
1617
raise ValueError(*(e.args))
2773
1618
timevalue += delta
2774
1619
return timevalue
2775
1620
2776
1621
2777
def daemon(nochdir=False, noclose=False):
1622
def if_nametoindex(interface):
1623
"""Call the C function if_nametoindex(), or equivalent
1624
1625
Note: This function cannot accept a unicode string."""
1626
global if_nametoindex
1627
try:
1628
if_nametoindex = (ctypes.cdll.LoadLibrary
1629
(ctypes.util.find_library("c"))
1630
.if_nametoindex)
1631
except (OSError, AttributeError):
1632
logger.warning("Doing if_nametoindex the hard way")
1633
def if_nametoindex(interface):
1634
"Get an interface index the hard way, i.e. using fcntl()"
1635
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1636
with contextlib.closing(socket.socket()) as s:
1637
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1638
struct.pack(str("16s16x"),
1639
interface))
1640
interface_index = struct.unpack(str("I"),
1641
ifreq[16:20])[0]
1642
return interface_index
1643
return if_nametoindex(interface)
1644
1645
1646
def daemon(nochdir = False, noclose = False):
2778
1647
"""See daemon(3). Standard BSD Unix function.
2779
1648
2780
1649
This should really exist as os.daemon, but it doesn't (yet)."""
2781
1650
if os.fork():
2782
1651
sys.exit()
2787
1656
sys.exit()
2788
1657
if not noclose:
2789
1658
# Close all standard open file descriptors
2790
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1659
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2791
1660
if not stat.S_ISCHR(os.fstat(null).st_mode):
2792
1661
raise OSError(errno.ENODEV,
2793
"{} not a character device"
2794
.format(os.devnull))
1662
"%s not a character device"
1663
% os.path.devnull)
2795
1664
os.dup2(null, sys.stdin.fileno())
2796
1665
os.dup2(null, sys.stdout.fileno())
2797
1666
os.dup2(null, sys.stderr.fileno())
2800
1669
2801
1670
2802
1671
def main():
2803
1672
2804
1673
##################################################################
2805
1674
# Parsing of options, both command line and config file
2806
2807
parser = argparse.ArgumentParser()
2808
parser.add_argument("-v", "--version", action="version",
2809
version="%(prog)s {}".format(version),
2810
help="show version number and exit")
2811
parser.add_argument("-i", "--interface", metavar="IF",
2812
help="Bind to interface IF")
2813
parser.add_argument("-a", "--address",
2814
help="Address to listen for requests on")
2815
parser.add_argument("-p", "--port", type=int,
2816
help="Port number to receive requests on")
2817
parser.add_argument("--check", action="store_true",
2818
help="Run self-test")
2819
parser.add_argument("--debug", action="store_true",
2820
help="Debug mode; run in foreground and log"
2821
" to terminal", default=None)
2822
parser.add_argument("--debuglevel", metavar="LEVEL",
2823
help="Debug level for stdout output")
2824
parser.add_argument("--priority", help="GnuTLS"
2825
" priority string (see GnuTLS documentation)")
2826
parser.add_argument("--servicename",
2827
metavar="NAME", help="Zeroconf service name")
2828
parser.add_argument("--configdir",
2829
default="/etc/mandos", metavar="DIR",
2830
help="Directory to search for configuration"
2831
" files")
2832
parser.add_argument("--no-dbus", action="store_false",
2833
dest="use_dbus", help="Do not provide D-Bus"
2834
" system bus interface", default=None)
2835
parser.add_argument("--no-ipv6", action="store_false",
2836
dest="use_ipv6", help="Do not use IPv6",
2837
default=None)
2838
parser.add_argument("--no-restore", action="store_false",
2839
dest="restore", help="Do not restore stored"
2840
" state", default=None)
2841
parser.add_argument("--socket", type=int,
2842
help="Specify a file descriptor to a network"
2843
" socket to use instead of creating one")
2844
parser.add_argument("--statedir", metavar="DIR",
2845
help="Directory to save/restore state in")
2846
parser.add_argument("--foreground", action="store_true",
2847
help="Run in foreground", default=None)
2848
parser.add_argument("--no-zeroconf", action="store_false",
2849
dest="zeroconf", help="Do not use Zeroconf",
2850
default=None)
2851
2852
options = parser.parse_args()
2853
1675
1676
parser = optparse.OptionParser(version = "%%prog %s" % version)
1677
parser.add_option("-i", "--interface", type="string",
1678
metavar="IF", help="Bind to interface IF")
1679
parser.add_option("-a", "--address", type="string",
1680
help="Address to listen for requests on")
1681
parser.add_option("-p", "--port", type="int",
1682
help="Port number to receive requests on")
1683
parser.add_option("--check", action="store_true",
1684
help="Run self-test")
1685
parser.add_option("--debug", action="store_true",
1686
help="Debug mode; run in foreground and log to"
1687
" terminal")
1688
parser.add_option("--debuglevel", type="string", metavar="LEVEL",
1689
help="Debug level for stdout output")
1690
parser.add_option("--priority", type="string", help="GnuTLS"
1691
" priority string (see GnuTLS documentation)")
1692
parser.add_option("--servicename", type="string",
1693
metavar="NAME", help="Zeroconf service name")
1694
parser.add_option("--configdir", type="string",
1695
default="/etc/mandos", metavar="DIR",
1696
help="Directory to search for configuration"
1697
" files")
1698
parser.add_option("--no-dbus", action="store_false",
1699
dest="use_dbus", help="Do not provide D-Bus"
1700
" system bus interface")
1701
parser.add_option("--no-ipv6", action="store_false",
1702
dest="use_ipv6", help="Do not use IPv6")
1703
options = parser.parse_args()[0]
1704
2854
1705
if options.check:
2855
1706
import doctest
2856
fail_count, test_count = doctest.testmod()
2857
sys.exit(os.EX_OK if fail_count == 0 else 1)
2858
1707
doctest.testmod()
1708
sys.exit()
1709
2859
1710
# Default values for config file for server-global settings
2860
server_defaults = {"interface": "",
2861
"address": "",
2862
"port": "",
2863
"debug": "False",
2864
"priority":
2865
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2866
":+SIGN-DSA-SHA256",
2867
"servicename": "Mandos",
2868
"use_dbus": "True",
2869
"use_ipv6": "True",
2870
"debuglevel": "",
2871
"restore": "True",
2872
"socket": "",
2873
"statedir": "/var/lib/mandos",
2874
"foreground": "False",
2875
"zeroconf": "True",
2876
}
2877
1711
server_defaults = { "interface": "",
1712
"address": "",
1713
"port": "",
1714
"debug": "False",
1715
"priority":
1716
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1717
"servicename": "Mandos",
1718
"use_dbus": "True",
1719
"use_ipv6": "True",
1720
"debuglevel": "",
1721
}
1722
2878
1723
# Parse config file for server-global settings
2879
1724
server_config = configparser.SafeConfigParser(server_defaults)
2880
1725
del server_defaults
2881
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1726
server_config.read(os.path.join(options.configdir,
1727
"mandos.conf"))
2882
1728
# Convert the SafeConfigParser object to a dict
2883
1729
server_settings = server_config.defaults()
2884
1730
# Use the appropriate methods on the non-string config options
2885
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1731
for option in ("debug", "use_dbus", "use_ipv6"):
2886
1732
server_settings[option] = server_config.getboolean("DEFAULT",
2887
1733
option)
2888
1734
if server_settings["port"]:
2889
1735
server_settings["port"] = server_config.getint("DEFAULT",
2890
1736
"port")
2891
if server_settings["socket"]:
2892
server_settings["socket"] = server_config.getint("DEFAULT",
2893
"socket")
2894
# Later, stdin will, and stdout and stderr might, be dup'ed
2895
# over with an opened os.devnull. But we don't want this to
2896
# happen with a supplied network socket.
2897
if 0 <= server_settings["socket"] <= 2:
2898
server_settings["socket"] = os.dup(server_settings
2899
["socket"])
2900
1737
del server_config
2901
1738
2902
1739
# Override the settings from the config file with command line
2903
1740
# options, if set.
2904
1741
for option in ("interface", "address", "port", "debug",
2905
"priority", "servicename", "configdir", "use_dbus",
2906
"use_ipv6", "debuglevel", "restore", "statedir",
2907
"socket", "foreground", "zeroconf"):
1742
"priority", "servicename", "configdir",
1743
"use_dbus", "use_ipv6", "debuglevel"):
2908
1744
value = getattr(options, option)
2909
1745
if value is not None:
2910
1746
server_settings[option] = value
2911
1747
del options
2912
1748
# Force all strings to be unicode
2913
1749
for option in server_settings.keys():
2914
if isinstance(server_settings[option], bytes):
2915
server_settings[option] = (server_settings[option]
2916
.decode("utf-8"))
2917
# Force all boolean options to be boolean
2918
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2919
"foreground", "zeroconf"):
2920
server_settings[option] = bool(server_settings[option])
2921
# Debug implies foreground
2922
if server_settings["debug"]:
2923
server_settings["foreground"] = True
1750
if type(server_settings[option]) is str:
1751
server_settings[option] = unicode(server_settings[option])
2924
1752
# Now we have our good server settings in "server_settings"
2925
1753
2926
1754
##################################################################
2927
2928
if (not server_settings["zeroconf"]
2929
and not (server_settings["port"]
2930
or server_settings["socket"] != "")):
2931
parser.error("Needs port or socket to work without Zeroconf")
2932
1755
2933
1756
# For convenience
2934
1757
debug = server_settings["debug"]
2935
1758
debuglevel = server_settings["debuglevel"]
2936
1759
use_dbus = server_settings["use_dbus"]
2937
1760
use_ipv6 = server_settings["use_ipv6"]
2938
stored_state_path = os.path.join(server_settings["statedir"],
2939
stored_state_file)
2940
foreground = server_settings["foreground"]
2941
zeroconf = server_settings["zeroconf"]
2942
2943
if debug:
2944
initlogger(debug, logging.DEBUG)
2945
else:
2946
if not debuglevel:
2947
initlogger(debug)
2948
else:
2949
level = getattr(logging, debuglevel.upper())
2950
initlogger(debug, level)
2951
1761
2952
1762
if server_settings["servicename"] != "Mandos":
2953
syslogger.setFormatter(
2954
logging.Formatter('Mandos ({}) [%(process)d]:'
2955
' %(levelname)s: %(message)s'.format(
2956
server_settings["servicename"])))
2957
1763
syslogger.setFormatter(logging.Formatter
1764
('Mandos (%s) [%%(process)d]:'
1765
' %%(levelname)s: %%(message)s'
1766
% server_settings["servicename"]))
1767
2958
1768
# Parse config file with clients
2959
client_config = configparser.SafeConfigParser(Client
2960
.client_defaults)
1769
client_defaults = { "timeout": "1h",
1770
"interval": "5m",
1771
"checker": "fping -q -- %%(host)s",
1772
"host": "",
1773
"approval_delay": "0s",
1774
"approval_duration": "1s",
1775
}
1776
client_config = configparser.SafeConfigParser(client_defaults)
2961
1777
client_config.read(os.path.join(server_settings["configdir"],
2962
1778
"clients.conf"))
2963
1779
2964
1780
global mandos_dbus_service
2965
1781
mandos_dbus_service = None
2966
2967
socketfd = None
2968
if server_settings["socket"] != "":
2969
socketfd = server_settings["socket"]
2970
tcp_server = MandosServer(
2971
(server_settings["address"], server_settings["port"]),
2972
ClientHandler,
2973
interface=(server_settings["interface"] or None),
2974
use_ipv6=use_ipv6,
2975
gnutls_priority=server_settings["priority"],
2976
use_dbus=use_dbus,
2977
socketfd=socketfd)
2978
if not foreground:
2979
pidfilename = "/run/mandos.pid"
2980
if not os.path.isdir("/run/."):
2981
pidfilename = "/var/run/mandos.pid"
2982
pidfile = None
2983
try:
2984
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2985
except IOError as e:
2986
logger.error("Could not open file %r", pidfilename,
2987
exc_info=e)
2988
2989
for name, group in (("_mandos", "_mandos"),
2990
("mandos", "mandos"),
2991
("nobody", "nogroup")):
2992
try:
2993
uid = pwd.getpwnam(name).pw_uid
2994
gid = pwd.getpwnam(group).pw_gid
2995
break
1782
1783
tcp_server = MandosServer((server_settings["address"],
1784
server_settings["port"]),
1785
ClientHandler,
1786
interface=(server_settings["interface"]
1787
or None),
1788
use_ipv6=use_ipv6,
1789
gnutls_priority=
1790
server_settings["priority"],
1791
use_dbus=use_dbus)
1792
if not debug:
1793
pidfilename = "/var/run/mandos.pid"
1794
try:
1795
pidfile = open(pidfilename, "w")
1796
except IOError:
1797
logger.error("Could not open file %r", pidfilename)
1798
1799
try:
1800
uid = pwd.getpwnam("_mandos").pw_uid
1801
gid = pwd.getpwnam("_mandos").pw_gid
1802
except KeyError:
1803
try:
1804
uid = pwd.getpwnam("mandos").pw_uid
1805
gid = pwd.getpwnam("mandos").pw_gid
2996
1806
except KeyError:
2997
continue
2998
else:
2999
uid = 65534
3000
gid = 65534
1807
try:
1808
uid = pwd.getpwnam("nobody").pw_uid
1809
gid = pwd.getpwnam("nobody").pw_gid
1810
except KeyError:
1811
uid = 65534
1812
gid = 65534
3001
1813
try:
3002
1814
os.setgid(gid)
3003
1815
os.setuid(uid)
3004
if debug:
3005
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3006
gid))
3007
except OSError as error:
3008
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3009
.format(uid, gid, os.strerror(error.errno)))
3010
if error.errno != errno.EPERM:
3011
raise
1816
except OSError, error:
1817
if error[0] != errno.EPERM:
1818
raise error
1819
1820
if not debug and not debuglevel:
1821
syslogger.setLevel(logging.WARNING)
1822
console.setLevel(logging.WARNING)
1823
if debuglevel:
1824
level = getattr(logging, debuglevel.upper())
1825
syslogger.setLevel(level)
1826
console.setLevel(level)
3012
1827
3013
1828
if debug:
3014
1829
# Enable all possible GnuTLS debugging
3015
1830
3016
1831
# "Use a log level over 10 to enable all debugging options."
3017
1832
# - GnuTLS manual
3018
gnutls.global_set_log_level(11)
3019
3020
@gnutls.log_func
1833
gnutls.library.functions.gnutls_global_set_log_level(11)
1834
1835
@gnutls.library.types.gnutls_log_func
3021
1836
def debug_gnutls(level, string):
3022
1837
logger.debug("GnuTLS: %s", string[:-1])
3023
3024
gnutls.global_set_log_function(debug_gnutls)
3025
1838
1839
(gnutls.library.functions
1840
.gnutls_global_set_log_function(debug_gnutls))
1841
3026
1842
# Redirect stdin so all checkers get /dev/null
3027
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1843
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3028
1844
os.dup2(null, sys.stdin.fileno())
3029
1845
if null > 2:
3030
1846
os.close(null)
3031
1847
else:
1848
# No console logging
1849
logger.removeHandler(console)
1850
3032
1851
# Need to fork before connecting to D-Bus
3033
if not foreground:
1852
if not debug:
3034
1853
# Close all input and output, do double fork, etc.
3035
1854
daemon()
3036
3037
# multiprocessing will use threads, so before we use GLib we need
3038
# to inform GLib that threads will be used.
3039
GLib.threads_init()
3040
1855
3041
1856
global main_loop
3042
1857
# From the Avahi example code
3043
DBusGMainLoop(set_as_default=True)
3044
main_loop = GLib.MainLoop()
1858
DBusGMainLoop(set_as_default=True )
1859
main_loop = gobject.MainLoop()
3045
1860
bus = dbus.SystemBus()
3046
1861
# End of Avahi example code
3047
1862
if use_dbus:
3048
1863
try:
3049
bus_name = dbus.service.BusName("se.recompile.Mandos",
3050
bus,
3051
do_not_queue=True)
3052
old_bus_name = dbus.service.BusName(
3053
"se.bsnet.fukt.Mandos", bus,
3054
do_not_queue=True)
3055
except dbus.exceptions.DBusException as e:
3056
logger.error("Disabling D-Bus:", exc_info=e)
1864
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1865
bus, do_not_queue=True)
1866
except dbus.exceptions.NameExistsException, e:
1867
logger.error(unicode(e) + ", disabling D-Bus")
3057
1868
use_dbus = False
3058
1869
server_settings["use_dbus"] = False
3059
1870
tcp_server.use_dbus = False
3060
if zeroconf:
3061
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3062
service = AvahiServiceToSyslog(
3063
name=server_settings["servicename"],
3064
servicetype="_mandos._tcp",
3065
protocol=protocol,
3066
bus=bus)
3067
if server_settings["interface"]:
3068
service.interface = if_nametoindex(
3069
server_settings["interface"].encode("utf-8"))
3070
1871
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1872
service = AvahiService(name = server_settings["servicename"],
1873
servicetype = "_mandos._tcp",
1874
protocol = protocol, bus = bus)
1875
if server_settings["interface"]:
1876
service.interface = (if_nametoindex
1877
(str(server_settings["interface"])))
1878
3071
1879
global multiprocessing_manager
3072
1880
multiprocessing_manager = multiprocessing.Manager()
3073
1881
3074
1882
client_class = Client
3075
1883
if use_dbus:
3076
client_class = functools.partial(ClientDBus, bus=bus)
3077
3078
client_settings = Client.config_parser(client_config)
3079
old_client_settings = {}
3080
clients_data = {}
3081
3082
# This is used to redirect stdout and stderr for checker processes
3083
global wnull
3084
wnull = open(os.devnull, "w") # A writable /dev/null
3085
# Only used if server is running in foreground but not in debug
3086
# mode
3087
if debug or not foreground:
3088
wnull.close()
3089
3090
# Get client data and settings from last running state.
3091
if server_settings["restore"]:
3092
try:
3093
with open(stored_state_path, "rb") as stored_state:
3094
if sys.version_info.major == 2:
3095
clients_data, old_client_settings = pickle.load(
3096
stored_state)
3097
else:
3098
bytes_clients_data, bytes_old_client_settings = (
3099
pickle.load(stored_state, encoding="bytes"))
3100
# Fix bytes to strings
3101
# clients_data
3102
# .keys()
3103
clients_data = {(key.decode("utf-8")
3104
if isinstance(key, bytes)
3105
else key): value
3106
for key, value in
3107
bytes_clients_data.items()}
3108
del bytes_clients_data
3109
for key in clients_data:
3110
value = {(k.decode("utf-8")
3111
if isinstance(k, bytes) else k): v
3112
for k, v in
3113
clients_data[key].items()}
3114
clients_data[key] = value
3115
# .client_structure
3116
value["client_structure"] = [
3117
(s.decode("utf-8")
3118
if isinstance(s, bytes)
3119
else s) for s in
3120
value["client_structure"]]
3121
# .name & .host
3122
for k in ("name", "host"):
3123
if isinstance(value[k], bytes):
3124
value[k] = value[k].decode("utf-8")
3125
# old_client_settings
3126
# .keys()
3127
old_client_settings = {
3128
(key.decode("utf-8")
3129
if isinstance(key, bytes)
3130
else key): value
3131
for key, value in
3132
bytes_old_client_settings.items()}
3133
del bytes_old_client_settings
3134
# .host
3135
for value in old_client_settings.values():
3136
if isinstance(value["host"], bytes):
3137
value["host"] = (value["host"]
3138
.decode("utf-8"))
3139
os.remove(stored_state_path)
3140
except IOError as e:
3141
if e.errno == errno.ENOENT:
3142
logger.warning("Could not load persistent state:"
3143
" {}".format(os.strerror(e.errno)))
3144
else:
3145
logger.critical("Could not load persistent state:",
3146
exc_info=e)
3147
raise
3148
except EOFError as e:
3149
logger.warning("Could not load persistent state: "
3150
"EOFError:",
3151
exc_info=e)
3152
3153
with PGPEngine() as pgp:
3154
for client_name, client in clients_data.items():
3155
# Skip removed clients
3156
if client_name not in client_settings:
3157
continue
3158
3159
# Decide which value to use after restoring saved state.
3160
# We have three different values: Old config file,
3161
# new config file, and saved state.
3162
# New config value takes precedence if it differs from old
3163
# config value, otherwise use saved state.
3164
for name, value in client_settings[client_name].items():
3165
try:
3166
# For each value in new config, check if it
3167
# differs from the old config value (Except for
3168
# the "secret" attribute)
3169
if (name != "secret"
3170
and (value !=
3171
old_client_settings[client_name][name])):
3172
client[name] = value
3173
except KeyError:
3174
pass
3175
3176
# Clients who has passed its expire date can still be
3177
# enabled if its last checker was successful. A Client
3178
# whose checker succeeded before we stored its state is
3179
# assumed to have successfully run all checkers during
3180
# downtime.
3181
if client["enabled"]:
3182
if datetime.datetime.utcnow() >= client["expires"]:
3183
if not client["last_checked_ok"]:
3184
logger.warning(
3185
"disabling client {} - Client never "
3186
"performed a successful checker".format(
3187
client_name))
3188
client["enabled"] = False
3189
elif client["last_checker_status"] != 0:
3190
logger.warning(
3191
"disabling client {} - Client last"
3192
" checker failed with error code"
3193
" {}".format(
3194
client_name,
3195
client["last_checker_status"]))
3196
client["enabled"] = False
3197
else:
3198
client["expires"] = (
3199
datetime.datetime.utcnow()
3200
+ client["timeout"])
3201
logger.debug("Last checker succeeded,"
3202
" keeping {} enabled".format(
3203
client_name))
1884
client_class = functools.partial(ClientDBus, bus = bus)
1885
def client_config_items(config, section):
1886
special_settings = {
1887
"approved_by_default":
1888
lambda: config.getboolean(section,
1889
"approved_by_default"),
1890
}
1891
for name, value in config.items(section):
3204
1892
try:
3205
client["secret"] = pgp.decrypt(
3206
client["encrypted_secret"],
3207
client_settings[client_name]["secret"])
3208
except PGPError:
3209
# If decryption fails, we use secret from new settings
3210
logger.debug("Failed to decrypt {} old secret".format(
3211
client_name))
3212
client["secret"] = (client_settings[client_name]
3213
["secret"])
3214
3215
# Add/remove clients based on new changes made to config
3216
for client_name in (set(old_client_settings)
3217
- set(client_settings)):
3218
del clients_data[client_name]
3219
for client_name in (set(client_settings)
3220
- set(old_client_settings)):
3221
clients_data[client_name] = client_settings[client_name]
3222
3223
# Create all client objects
3224
for client_name, client in clients_data.items():
3225
tcp_server.clients[client_name] = client_class(
3226
name=client_name,
3227
settings=client,
3228
server_settings=server_settings)
3229
1893
yield (name, special_settings[name]())
1894
except KeyError:
1895
yield (name, value)
1896
1897
tcp_server.clients.update(set(
1898
client_class(name = section,
1899
config= dict(client_config_items(
1900
client_config, section)))
1901
for section in client_config.sections()))
3230
1902
if not tcp_server.clients:
3231
1903
logger.warning("No clients defined")
3232
3233
if not foreground:
3234
if pidfile is not None:
3235
pid = os.getpid()
3236
try:
3237
with pidfile:
3238
print(pid, file=pidfile)
3239
except IOError:
3240
logger.error("Could not write to file %r with PID %d",
3241
pidfilename, pid)
3242
del pidfile
1904
1905
if not debug:
1906
try:
1907
with pidfile:
1908
pid = os.getpid()
1909
pidfile.write(str(pid) + "\n".encode("utf-8"))
1910
del pidfile
1911
except IOError:
1912
logger.error("Could not write to file %r with PID %d",
1913
pidfilename, pid)
1914
except NameError:
1915
# "pidfile" was never created
1916
pass
3243
1917
del pidfilename
3244
3245
for termsig in (signal.SIGHUP, signal.SIGTERM):
3246
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3247
lambda: main_loop.quit() and False)
3248
1918
1919
signal.signal(signal.SIGINT, signal.SIG_IGN)
1920
1921
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1922
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1923
3249
1924
if use_dbus:
3250
3251
@alternate_dbus_interfaces(
3252
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3253
class MandosDBusService(DBusObjectWithObjectManager):
1925
class MandosDBusService(dbus.service.Object):
3254
1926
"""A D-Bus proxy object"""
3255
3256
1927
def __init__(self):
3257
1928
dbus.service.Object.__init__(self, bus, "/")
3258
3259
_interface = "se.recompile.Mandos"
3260
1929
_interface = "se.bsnet.fukt.Mandos"
1930
3261
1931
@dbus.service.signal(_interface, signature="o")
3262
1932
def ClientAdded(self, objpath):
3263
1933
"D-Bus signal"
3264
1934
pass
3265
1935
3266
1936
@dbus.service.signal(_interface, signature="ss")
3267
1937
def ClientNotFound(self, fingerprint, address):
3268
1938
"D-Bus signal"
3269
1939
pass
3270
3271
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3272
"true"})
1940
3273
1941
@dbus.service.signal(_interface, signature="os")
3274
1942
def ClientRemoved(self, objpath, name):
3275
1943
"D-Bus signal"
3276
1944
pass
3277
3278
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3279
"true"})
1945
3280
1946
@dbus.service.method(_interface, out_signature="ao")
3281
1947
def GetAllClients(self):
3282
1948
"D-Bus method"
3283
return dbus.Array(c.dbus_object_path for c in
3284
tcp_server.clients.values())
3285
3286
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3287
"true"})
1949
return dbus.Array(c.dbus_object_path
1950
for c in tcp_server.clients)
1951
3288
1952
@dbus.service.method(_interface,
3289
1953
out_signature="a{oa{sv}}")
3290
1954
def GetAllClientsWithProperties(self):
3291
1955
"D-Bus method"
3292
1956
return dbus.Dictionary(
3293
{c.dbus_object_path: c.GetAll(
3294
"se.recompile.Mandos.Client")
3295
for c in tcp_server.clients.values()},
1957
((c.dbus_object_path, c.GetAll(""))
1958
for c in tcp_server.clients),
3296
1959
signature="oa{sv}")
3297
1960
3298
1961
@dbus.service.method(_interface, in_signature="o")
3299
1962
def RemoveClient(self, object_path):
3300
1963
"D-Bus method"
3301
for c in tcp_server.clients.values():
1964
for c in tcp_server.clients:
3302
1965
if c.dbus_object_path == object_path:
3303
del tcp_server.clients[c.name]
1966
tcp_server.clients.remove(c)
3304
1967
c.remove_from_connection()
3305
# Don't signal the disabling
1968
# Don't signal anything except ClientRemoved
3306
1969
c.disable(quiet=True)
3307
# Emit D-Bus signal for removal
3308
self.client_removed_signal(c)
1970
# Emit D-Bus signal
1971
self.ClientRemoved(object_path, c.name)
3309
1972
return
3310
1973
raise KeyError(object_path)
3311
1974
3312
1975
del _interface
3313
3314
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3315
out_signature="a{oa{sa{sv}}}")
3316
def GetManagedObjects(self):
3317
"""D-Bus method"""
3318
return dbus.Dictionary(
3319
{client.dbus_object_path:
3320
dbus.Dictionary(
3321
{interface: client.GetAll(interface)
3322
for interface in
3323
client._get_all_interface_names()})
3324
for client in tcp_server.clients.values()})
3325
3326
def client_added_signal(self, client):
3327
"""Send the new standard signal and the old signal"""
3328
if use_dbus:
3329
# New standard signal
3330
self.InterfacesAdded(
3331
client.dbus_object_path,
3332
dbus.Dictionary(
3333
{interface: client.GetAll(interface)
3334
for interface in
3335
client._get_all_interface_names()}))
3336
# Old signal
3337
self.ClientAdded(client.dbus_object_path)
3338
3339
def client_removed_signal(self, client):
3340
"""Send the new standard signal and the old signal"""
3341
if use_dbus:
3342
# New standard signal
3343
self.InterfacesRemoved(
3344
client.dbus_object_path,
3345
client._get_all_interface_names())
3346
# Old signal
3347
self.ClientRemoved(client.dbus_object_path,
3348
client.name)
3349
1976
3350
1977
mandos_dbus_service = MandosDBusService()
3351
3352
# Save modules to variables to exempt the modules from being
3353
# unloaded before the function registered with atexit() is run.
3354
mp = multiprocessing
3355
wn = wnull
3356
1978
3357
1979
def cleanup():
3358
1980
"Cleanup function; run on exit"
3359
if zeroconf:
3360
service.cleanup()
3361
3362
mp.active_children()
3363
wn.close()
3364
if not (tcp_server.clients or client_settings):
3365
return
3366
3367
# Store client before exiting. Secrets are encrypted with key
3368
# based on what config file has. If config file is
3369
# removed/edited, old secret will thus be unrecovable.
3370
clients = {}
3371
with PGPEngine() as pgp:
3372
for client in tcp_server.clients.values():
3373
key = client_settings[client.name]["secret"]
3374
client.encrypted_secret = pgp.encrypt(client.secret,
3375
key)
3376
client_dict = {}
3377
3378
# A list of attributes that can not be pickled
3379
# + secret.
3380
exclude = {"bus", "changedstate", "secret",
3381
"checker", "server_settings"}
3382
for name, typ in inspect.getmembers(dbus.service
3383
.Object):
3384
exclude.add(name)
3385
3386
client_dict["encrypted_secret"] = (client
3387
.encrypted_secret)
3388
for attr in client.client_structure:
3389
if attr not in exclude:
3390
client_dict[attr] = getattr(client, attr)
3391
3392
clients[client.name] = client_dict
3393
del client_settings[client.name]["secret"]
3394
3395
try:
3396
with tempfile.NamedTemporaryFile(
3397
mode='wb',
3398
suffix=".pickle",
3399
prefix='clients-',
3400
dir=os.path.dirname(stored_state_path),
3401
delete=False) as stored_state:
3402
pickle.dump((clients, client_settings), stored_state,
3403
protocol=2)
3404
tempname = stored_state.name
3405
os.rename(tempname, stored_state_path)
3406
except (IOError, OSError) as e:
3407
if not debug:
3408
try:
3409
os.remove(tempname)
3410
except NameError:
3411
pass
3412
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3413
logger.warning("Could not save persistent state: {}"
3414
.format(os.strerror(e.errno)))
3415
else:
3416
logger.warning("Could not save persistent state:",
3417
exc_info=e)
3418
raise
3419
3420
# Delete all clients, and settings from config
1981
service.cleanup()
1982
3421
1983
while tcp_server.clients:
3422
name, client = tcp_server.clients.popitem()
1984
client = tcp_server.clients.pop()
3423
1985
if use_dbus:
3424
1986
client.remove_from_connection()
3425
# Don't signal the disabling
1987
client.disable_hook = None
1988
# Don't signal anything except ClientRemoved
3426
1989
client.disable(quiet=True)
3427
# Emit D-Bus signal for removal
3428
1990
if use_dbus:
3429
mandos_dbus_service.client_removed_signal(client)
3430
client_settings.clear()
3431
1991
# Emit D-Bus signal
1992
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1993
client.name)
1994
3432
1995
atexit.register(cleanup)
3433
3434
for client in tcp_server.clients.values():
1996
1997
for client in tcp_server.clients:
3435
1998
if use_dbus:
3436
# Emit D-Bus signal for adding
3437
mandos_dbus_service.client_added_signal(client)
3438
# Need to initiate checking of clients
3439
if client.enabled:
3440
client.init_checker()
3441
1999
# Emit D-Bus signal
2000
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2001
client.enable()
2002
3442
2003
tcp_server.enable()
3443
2004
tcp_server.server_activate()
3444
2005
3445
2006
# Find out what port we got
3446
if zeroconf:
3447
service.port = tcp_server.socket.getsockname()[1]
2007
service.port = tcp_server.socket.getsockname()[1]
3448
2008
if use_ipv6:
3449
2009
logger.info("Now listening on address %r, port %d,"
3450
" flowinfo %d, scope_id %d",
3451
*tcp_server.socket.getsockname())
2010
" flowinfo %d, scope_id %d"
2011
% tcp_server.socket.getsockname())
3452
2012
else: # IPv4
3453
logger.info("Now listening on address %r, port %d",
3454
*tcp_server.socket.getsockname())
3455
3456
# service.interface = tcp_server.socket.getsockname()[3]
3457
2013
logger.info("Now listening on address %r, port %d"
2014
% tcp_server.socket.getsockname())
2015
2016
#service.interface = tcp_server.socket.getsockname()[3]
2017
3458
2018
try:
3459
if zeroconf:
3460
# From the Avahi example code
3461
try:
3462
service.activate()
3463
except dbus.exceptions.DBusException as error:
3464
logger.critical("D-Bus Exception", exc_info=error)
3465
cleanup()
3466
sys.exit(1)
3467
# End of Avahi example code
3468
3469
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3470
lambda *args, **kwargs:
3471
(tcp_server.handle_request
3472
(*args[2:], **kwargs) or True))
3473
2019
# From the Avahi example code
2020
try:
2021
service.activate()
2022
except dbus.exceptions.DBusException, error:
2023
logger.critical("DBusException: %s", error)
2024
cleanup()
2025
sys.exit(1)
2026
# End of Avahi example code
2027
2028
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2029
lambda *args, **kwargs:
2030
(tcp_server.handle_request
2031
(*args[2:], **kwargs) or True))
2032
3474
2033
logger.debug("Starting main loop")
3475
2034
main_loop.run()
3476
except AvahiError as error:
3477
logger.critical("Avahi Error", exc_info=error)
2035
except AvahiError, error:
2036
logger.critical("AvahiError: %s", error)
3478
2037
cleanup()
3479
2038
sys.exit(1)
3480
2039
except KeyboardInterrupt:
3485
2044
# Must run before the D-Bus bus name gets deregistered
3486
2045
cleanup()
3487
2046
3488
3489
2047
if __name__ == '__main__':
3490
2048
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0