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- Committer: Teddy Hogeborn
- Date: 2011-02-27 17:26:35 UTC
- Revision ID: teddy@fukt.bsnet.se-20110227172635-hw1sire7k3vuo1co
Update copyright year to "2011" wherever appropriate.
- 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 © 2008-2017 Teddy Hogeborn
15
# Copyright © 2008-2017 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 = "1.7.15"
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
1464
try:
1465
dbus.OBJECT_MANAGER_IFACE
1466
except AttributeError:
1467
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1468
1469
1470
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1471
"""A D-Bus object with an ObjectManager.
1472
1473
Classes inheriting from this exposes the standard
1474
GetManagedObjects call and the InterfacesAdded and
1475
InterfacesRemoved signals on the standard
1476
"org.freedesktop.DBus.ObjectManager" interface.
1477
1478
Note: No signals are sent automatically; they must be sent
1479
manually.
1480
"""
1481
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1482
out_signature="a{oa{sa{sv}}}")
1483
def GetManagedObjects(self):
1484
"""This function must be overridden"""
1485
raise NotImplementedError()
1486
1487
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1488
signature="oa{sa{sv}}")
1489
def InterfacesAdded(self, object_path, interfaces_and_properties):
1490
pass
1491
1492
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1493
def InterfacesRemoved(self, object_path, interfaces):
1494
pass
1495
1496
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1497
out_signature="s",
1498
path_keyword='object_path',
1499
connection_keyword='connection')
1500
def Introspect(self, object_path, connection):
1501
"""Overloading of standard D-Bus method.
1502
1503
Override return argument name of GetManagedObjects to be
1504
"objpath_interfaces_and_properties"
1505
"""
1506
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1507
object_path,
1508
connection)
1509
try:
1510
document = xml.dom.minidom.parseString(xmlstring)
1511
1512
for if_tag in document.getElementsByTagName("interface"):
1513
# Fix argument name for the GetManagedObjects method
1514
if (if_tag.getAttribute("name")
1515
== dbus.OBJECT_MANAGER_IFACE):
1516
for cn in if_tag.getElementsByTagName("method"):
1517
if (cn.getAttribute("name")
1518
== "GetManagedObjects"):
1519
for arg in cn.getElementsByTagName("arg"):
1520
if (arg.getAttribute("direction")
1521
== "out"):
1522
arg.setAttribute(
1523
"name",
1524
"objpath_interfaces"
1525
"_and_properties")
1526
xmlstring = document.toxml("utf-8")
1527
document.unlink()
1528
except (AttributeError, xml.dom.DOMException,
1529
xml.parsers.expat.ExpatError) as error:
1530
logger.error("Failed to override Introspection method",
1531
exc_info=error)
1532
return xmlstring
1533
1534
1535
def datetime_to_dbus(dt, variant_level=0):
1536
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1537
if dt is None:
1538
return dbus.String("", variant_level=variant_level)
1539
return dbus.String(dt.isoformat(), variant_level=variant_level)
1540
1541
1542
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1543
"""A class decorator; applied to a subclass of
1544
dbus.service.Object, it will add alternate D-Bus attributes with
1545
interface names according to the "alt_interface_names" mapping.
1546
Usage:
1547
1548
@alternate_dbus_interfaces({"org.example.Interface":
1549
"net.example.AlternateInterface"})
1550
class SampleDBusObject(dbus.service.Object):
1551
@dbus.service.method("org.example.Interface")
1552
def SampleDBusMethod():
1553
pass
1554
1555
The above "SampleDBusMethod" on "SampleDBusObject" will be
1556
reachable via two interfaces: "org.example.Interface" and
1557
"net.example.AlternateInterface", the latter of which will have
1558
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1559
"true", unless "deprecate" is passed with a False value.
1560
1561
This works for methods and signals, and also for D-Bus properties
1562
(from DBusObjectWithProperties) and interfaces (from the
1563
dbus_interface_annotations decorator).
1564
"""
1565
1566
def wrapper(cls):
1567
for orig_interface_name, alt_interface_name in (
1568
alt_interface_names.items()):
1569
attr = {}
1570
interface_names = set()
1571
# Go though all attributes of the class
1572
for attrname, attribute in inspect.getmembers(cls):
1573
# Ignore non-D-Bus attributes, and D-Bus attributes
1574
# with the wrong interface name
1575
if (not hasattr(attribute, "_dbus_interface")
1576
or not attribute._dbus_interface.startswith(
1577
orig_interface_name)):
1578
continue
1579
# Create an alternate D-Bus interface name based on
1580
# the current name
1581
alt_interface = attribute._dbus_interface.replace(
1582
orig_interface_name, alt_interface_name)
1583
interface_names.add(alt_interface)
1584
# Is this a D-Bus signal?
1585
if getattr(attribute, "_dbus_is_signal", False):
1586
# Extract the original non-method undecorated
1587
# function by black magic
1588
if sys.version_info.major == 2:
1589
nonmethod_func = (dict(
1590
zip(attribute.func_code.co_freevars,
1591
attribute.__closure__))
1592
["func"].cell_contents)
1593
else:
1594
nonmethod_func = (dict(
1595
zip(attribute.__code__.co_freevars,
1596
attribute.__closure__))
1597
["func"].cell_contents)
1598
# Create a new, but exactly alike, function
1599
# object, and decorate it to be a new D-Bus signal
1600
# with the alternate D-Bus interface name
1601
new_function = copy_function(nonmethod_func)
1602
new_function = (dbus.service.signal(
1603
alt_interface,
1604
attribute._dbus_signature)(new_function))
1605
# Copy annotations, if any
1606
try:
1607
new_function._dbus_annotations = dict(
1608
attribute._dbus_annotations)
1609
except AttributeError:
1610
pass
1611
1612
# Define a creator of a function to call both the
1613
# original and alternate functions, so both the
1614
# original and alternate signals gets sent when
1615
# the function is called
1616
def fixscope(func1, func2):
1617
"""This function is a scope container to pass
1618
func1 and func2 to the "call_both" function
1619
outside of its arguments"""
1620
1621
@functools.wraps(func2)
1622
def call_both(*args, **kwargs):
1623
"""This function will emit two D-Bus
1624
signals by calling func1 and func2"""
1625
func1(*args, **kwargs)
1626
func2(*args, **kwargs)
1627
# Make wrapper function look like a D-Bus
1628
# signal
1629
for name, attr in inspect.getmembers(func2):
1630
if name.startswith("_dbus_"):
1631
setattr(call_both, name, attr)
1632
1633
return call_both
1634
# Create the "call_both" function and add it to
1635
# the class
1636
attr[attrname] = fixscope(attribute, new_function)
1637
# Is this a D-Bus method?
1638
elif getattr(attribute, "_dbus_is_method", False):
1639
# Create a new, but exactly alike, function
1640
# object. Decorate it to be a new D-Bus method
1641
# with the alternate D-Bus interface name. Add it
1642
# to the class.
1643
attr[attrname] = (
1644
dbus.service.method(
1645
alt_interface,
1646
attribute._dbus_in_signature,
1647
attribute._dbus_out_signature)
1648
(copy_function(attribute)))
1649
# Copy annotations, if any
1650
try:
1651
attr[attrname]._dbus_annotations = dict(
1652
attribute._dbus_annotations)
1653
except AttributeError:
1654
pass
1655
# Is this a D-Bus property?
1656
elif getattr(attribute, "_dbus_is_property", False):
1657
# Create a new, but exactly alike, function
1658
# object, and decorate it to be a new D-Bus
1659
# property with the alternate D-Bus interface
1660
# name. Add it to the class.
1661
attr[attrname] = (dbus_service_property(
1662
alt_interface, attribute._dbus_signature,
1663
attribute._dbus_access,
1664
attribute._dbus_get_args_options
1665
["byte_arrays"])
1666
(copy_function(attribute)))
1667
# Copy annotations, if any
1668
try:
1669
attr[attrname]._dbus_annotations = dict(
1670
attribute._dbus_annotations)
1671
except AttributeError:
1672
pass
1673
# Is this a D-Bus interface?
1674
elif getattr(attribute, "_dbus_is_interface", False):
1675
# Create a new, but exactly alike, function
1676
# object. Decorate it to be a new D-Bus interface
1677
# with the alternate D-Bus interface name. Add it
1678
# to the class.
1679
attr[attrname] = (
1680
dbus_interface_annotations(alt_interface)
1681
(copy_function(attribute)))
1682
if deprecate:
1683
# Deprecate all alternate interfaces
1684
iname = "_AlternateDBusNames_interface_annotation{}"
1685
for interface_name in interface_names:
1686
1687
@dbus_interface_annotations(interface_name)
1688
def func(self):
1689
return {"org.freedesktop.DBus.Deprecated":
1690
"true"}
1691
# Find an unused name
1692
for aname in (iname.format(i)
1693
for i in itertools.count()):
1694
if aname not in attr:
1695
attr[aname] = func
1696
break
1697
if interface_names:
1698
# Replace the class with a new subclass of it with
1699
# methods, signals, etc. as created above.
1700
if sys.version_info.major == 2:
1701
cls = type(b"{}Alternate".format(cls.__name__),
1702
(cls, ), attr)
1703
else:
1704
cls = type("{}Alternate".format(cls.__name__),
1705
(cls, ), attr)
1706
return cls
1707
1708
return wrapper
1709
1710
1711
@alternate_dbus_interfaces({"se.recompile.Mandos":
1712
"se.bsnet.fukt.Mandos"})
707
xml.parsers.expat.ExpatError), error:
708
logger.error("Failed to override Introspection method",
709
error)
710
return xmlstring
711
712
1713
713
class ClientDBus(Client, DBusObjectWithProperties):
1714
714
"""A Client class using D-Bus
1715
715
1716
716
Attributes:
1717
717
dbus_object_path: dbus.ObjectPath
1718
718
bus: dbus.SystemBus()
1719
719
"""
1720
720
1721
721
runtime_expansions = (Client.runtime_expansions
1722
+ ("dbus_object_path", ))
1723
1724
_interface = "se.recompile.Mandos.Client"
1725
722
+ ("dbus_object_path",))
723
1726
724
# dbus.service.Object doesn't use super(), so we can't either.
1727
1728
def __init__(self, bus=None, *args, **kwargs):
725
726
def __init__(self, bus = None, *args, **kwargs):
727
self._approvals_pending = 0
1729
728
self.bus = bus
1730
729
Client.__init__(self, *args, **kwargs)
1731
730
# Only now, when this client is initialized, can it show up on
1732
731
# the D-Bus
1733
client_object_name = str(self.name).translate(
732
client_object_name = unicode(self.name).translate(
1734
733
{ord("."): ord("_"),
1735
734
ord("-"): ord("_")})
1736
self.dbus_object_path = dbus.ObjectPath(
1737
"/clients/" + client_object_name)
735
self.dbus_object_path = (dbus.ObjectPath
736
("/clients/" + client_object_name))
1738
737
DBusObjectWithProperties.__init__(self, self.bus,
1739
738
self.dbus_object_path)
1740
1741
def notifychangeproperty(transform_func, dbus_name,
1742
type_func=lambda x: x,
1743
variant_level=1,
1744
invalidate_only=False,
1745
_interface=_interface):
1746
""" Modify a variable so that it's a property which announces
1747
its changes to DBus.
1748
1749
transform_fun: Function that takes a value and a variant_level
1750
and transforms it to a D-Bus type.
1751
dbus_name: D-Bus name of the variable
1752
type_func: Function that transform the value before sending it
1753
to the D-Bus. Default: no transform
1754
variant_level: D-Bus variant level. Default: 1
1755
"""
1756
attrname = "_{}".format(dbus_name)
1757
1758
def setter(self, value):
1759
if hasattr(self, "dbus_object_path"):
1760
if (not hasattr(self, attrname) or
1761
type_func(getattr(self, attrname, None))
1762
!= type_func(value)):
1763
if invalidate_only:
1764
self.PropertiesChanged(
1765
_interface, dbus.Dictionary(),
1766
dbus.Array((dbus_name, )))
1767
else:
1768
dbus_value = transform_func(
1769
type_func(value),
1770
variant_level=variant_level)
1771
self.PropertyChanged(dbus.String(dbus_name),
1772
dbus_value)
1773
self.PropertiesChanged(
1774
_interface,
1775
dbus.Dictionary({dbus.String(dbus_name):
1776
dbus_value}),
1777
dbus.Array())
1778
setattr(self, attrname, value)
1779
1780
return property(lambda self: getattr(self, attrname), setter)
1781
1782
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1783
approvals_pending = notifychangeproperty(dbus.Boolean,
1784
"ApprovalPending",
1785
type_func=bool)
1786
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1787
last_enabled = notifychangeproperty(datetime_to_dbus,
1788
"LastEnabled")
1789
checker = notifychangeproperty(
1790
dbus.Boolean, "CheckerRunning",
1791
type_func=lambda checker: checker is not None)
1792
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1793
"LastCheckedOK")
1794
last_checker_status = notifychangeproperty(dbus.Int16,
1795
"LastCheckerStatus")
1796
last_approval_request = notifychangeproperty(
1797
datetime_to_dbus, "LastApprovalRequest")
1798
approved_by_default = notifychangeproperty(dbus.Boolean,
1799
"ApprovedByDefault")
1800
approval_delay = notifychangeproperty(
1801
dbus.UInt64, "ApprovalDelay",
1802
type_func=lambda td: td.total_seconds() * 1000)
1803
approval_duration = notifychangeproperty(
1804
dbus.UInt64, "ApprovalDuration",
1805
type_func=lambda td: td.total_seconds() * 1000)
1806
host = notifychangeproperty(dbus.String, "Host")
1807
timeout = notifychangeproperty(
1808
dbus.UInt64, "Timeout",
1809
type_func=lambda td: td.total_seconds() * 1000)
1810
extended_timeout = notifychangeproperty(
1811
dbus.UInt64, "ExtendedTimeout",
1812
type_func=lambda td: td.total_seconds() * 1000)
1813
interval = notifychangeproperty(
1814
dbus.UInt64, "Interval",
1815
type_func=lambda td: td.total_seconds() * 1000)
1816
checker_command = notifychangeproperty(dbus.String, "Checker")
1817
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1818
invalidate_only=True)
1819
1820
del notifychangeproperty
1821
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
1822
784
def __del__(self, *args, **kwargs):
1823
785
try:
1824
786
self.remove_from_connection()
1827
789
if hasattr(DBusObjectWithProperties, "__del__"):
1828
790
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1829
791
Client.__del__(self, *args, **kwargs)
1830
1831
def checker_callback(self, source, condition,
1832
connection, command, *args, **kwargs):
1833
ret = Client.checker_callback(self, source, condition,
1834
connection, command, *args,
1835
**kwargs)
1836
exitstatus = self.last_checker_status
1837
if exitstatus >= 0:
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)
1838
802
# Emit D-Bus signal
1839
803
self.CheckerCompleted(dbus.Int16(exitstatus),
1840
# This is specific to GNU libC
1841
dbus.Int64(exitstatus << 8),
804
dbus.Int64(condition),
1842
805
dbus.String(command))
1843
806
else:
1844
807
# Emit D-Bus signal
1845
808
self.CheckerCompleted(dbus.Int16(-1),
1846
dbus.Int64(
1847
# This is specific to GNU libC
1848
(exitstatus << 8)
1849
| self.last_checker_signal),
809
dbus.Int64(condition),
1850
810
dbus.String(command))
1851
return ret
1852
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
1853
833
def start_checker(self, *args, **kwargs):
1854
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
1855
839
r = Client.start_checker(self, *args, **kwargs)
1856
840
# Only if new checker process was started
1857
841
if (self.checker is not None
1858
842
and old_checker_pid != self.checker.pid):
1859
843
# Emit D-Bus signal
1860
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))
1861
857
return r
1862
858
1863
859
def _reset_approved(self):
1864
self.approved = None
860
self._approved = None
1865
861
return False
1866
862
1867
863
def approve(self, value=True):
1868
self.approved = value
1869
GLib.timeout_add(int(self.approval_duration.total_seconds()
1870
* 1000), self._reset_approved)
1871
864
self.send_changedstate()
1872
1873
# D-Bus methods, signals & properties
1874
1875
# Interfaces
1876
1877
# Signals
1878
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
1879
876
# CheckerCompleted - signal
1880
877
@dbus.service.signal(_interface, signature="nxs")
1881
878
def CheckerCompleted(self, exitcode, waitstatus, command):
1882
879
"D-Bus signal"
1883
880
pass
1884
881
1885
882
# CheckerStarted - signal
1886
883
@dbus.service.signal(_interface, signature="s")
1887
884
def CheckerStarted(self, command):
1888
885
"D-Bus signal"
1889
886
pass
1890
887
1891
888
# PropertyChanged - signal
1892
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1893
889
@dbus.service.signal(_interface, signature="sv")
1894
890
def PropertyChanged(self, property, value):
1895
891
"D-Bus signal"
1896
892
pass
1897
893
1898
894
# GotSecret - signal
1899
895
@dbus.service.signal(_interface)
1900
896
def GotSecret(self):
1903
899
server to mandos-client
1904
900
"""
1905
901
pass
1906
902
1907
903
# Rejected - signal
1908
904
@dbus.service.signal(_interface, signature="s")
1909
905
def Rejected(self, reason):
1910
906
"D-Bus signal"
1911
907
pass
1912
908
1913
909
# NeedApproval - signal
1914
910
@dbus.service.signal(_interface, signature="tb")
1915
911
def NeedApproval(self, timeout, default):
1916
912
"D-Bus signal"
1917
913
return self.need_approval()
1918
1919
# Methods
1920
914
915
## Methods
916
1921
917
# Approve - method
1922
918
@dbus.service.method(_interface, in_signature="b")
1923
919
def Approve(self, value):
1924
920
self.approve(value)
1925
921
1926
922
# CheckedOK - method
1927
923
@dbus.service.method(_interface)
1928
924
def CheckedOK(self):
1929
self.checked_ok()
1930
925
return self.checked_ok()
926
1931
927
# Enable - method
1932
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1933
928
@dbus.service.method(_interface)
1934
929
def Enable(self):
1935
930
"D-Bus method"
1936
931
self.enable()
1937
932
1938
933
# StartChecker - method
1939
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1940
934
@dbus.service.method(_interface)
1941
935
def StartChecker(self):
1942
936
"D-Bus method"
1943
937
self.start_checker()
1944
938
1945
939
# Disable - method
1946
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1947
940
@dbus.service.method(_interface)
1948
941
def Disable(self):
1949
942
"D-Bus method"
1950
943
self.disable()
1951
944
1952
945
# StopChecker - method
1953
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1954
946
@dbus.service.method(_interface)
1955
947
def StopChecker(self):
1956
948
self.stop_checker()
1957
1958
# Properties
1959
949
950
## Properties
951
1960
952
# ApprovalPending - property
1961
953
@dbus_service_property(_interface, signature="b", access="read")
1962
954
def ApprovalPending_dbus_property(self):
1963
955
return dbus.Boolean(bool(self.approvals_pending))
1964
956
1965
957
# ApprovedByDefault - property
1966
@dbus_service_property(_interface,
1967
signature="b",
958
@dbus_service_property(_interface, signature="b",
1968
959
access="readwrite")
1969
960
def ApprovedByDefault_dbus_property(self, value=None):
1970
961
if value is None: # get
1971
962
return dbus.Boolean(self.approved_by_default)
1972
963
self.approved_by_default = bool(value)
1973
964
# Emit D-Bus signal
965
self.PropertyChanged(dbus.String("ApprovedByDefault"),
966
dbus.Boolean(value, variant_level=1))
967
1974
968
# ApprovalDelay - property
1975
@dbus_service_property(_interface,
1976
signature="t",
969
@dbus_service_property(_interface, signature="t",
1977
970
access="readwrite")
1978
971
def ApprovalDelay_dbus_property(self, value=None):
1979
972
if value is None: # get
1980
return dbus.UInt64(self.approval_delay.total_seconds()
1981
* 1000)
973
return dbus.UInt64(self.approval_delay_milliseconds())
1982
974
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1983
975
# Emit D-Bus signal
976
self.PropertyChanged(dbus.String("ApprovalDelay"),
977
dbus.UInt64(value, variant_level=1))
978
1984
979
# ApprovalDuration - property
1985
@dbus_service_property(_interface,
1986
signature="t",
980
@dbus_service_property(_interface, signature="t",
1987
981
access="readwrite")
1988
982
def ApprovalDuration_dbus_property(self, value=None):
1989
983
if value is None: # get
1990
return dbus.UInt64(self.approval_duration.total_seconds()
1991
* 1000)
984
return dbus.UInt64(self._timedelta_to_milliseconds(
985
self.approval_duration))
1992
986
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1993
987
# Emit D-Bus signal
988
self.PropertyChanged(dbus.String("ApprovalDuration"),
989
dbus.UInt64(value, variant_level=1))
990
1994
991
# Name - property
1995
@dbus_annotations(
1996
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1997
992
@dbus_service_property(_interface, signature="s", access="read")
1998
993
def Name_dbus_property(self):
1999
994
return dbus.String(self.name)
2000
995
2001
996
# Fingerprint - property
2002
@dbus_annotations(
2003
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2004
997
@dbus_service_property(_interface, signature="s", access="read")
2005
998
def Fingerprint_dbus_property(self):
2006
999
return dbus.String(self.fingerprint)
2007
1000
2008
1001
# Host - property
2009
@dbus_service_property(_interface,
2010
signature="s",
1002
@dbus_service_property(_interface, signature="s",
2011
1003
access="readwrite")
2012
1004
def Host_dbus_property(self, value=None):
2013
1005
if value is None: # get
2014
1006
return dbus.String(self.host)
2015
self.host = str(value)
2016
1007
self.host = value
1008
# Emit D-Bus signal
1009
self.PropertyChanged(dbus.String("Host"),
1010
dbus.String(value, variant_level=1))
1011
2017
1012
# Created - property
2018
@dbus_annotations(
2019
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2020
1013
@dbus_service_property(_interface, signature="s", access="read")
2021
1014
def Created_dbus_property(self):
2022
return datetime_to_dbus(self.created)
2023
1015
return dbus.String(self._datetime_to_dbus(self.created))
1016
2024
1017
# LastEnabled - property
2025
1018
@dbus_service_property(_interface, signature="s", access="read")
2026
1019
def LastEnabled_dbus_property(self):
2027
return datetime_to_dbus(self.last_enabled)
2028
1020
if self.last_enabled is None:
1021
return dbus.String("")
1022
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1023
2029
1024
# Enabled - property
2030
@dbus_service_property(_interface,
2031
signature="b",
1025
@dbus_service_property(_interface, signature="b",
2032
1026
access="readwrite")
2033
1027
def Enabled_dbus_property(self, value=None):
2034
1028
if value is None: # get
2037
1031
self.enable()
2038
1032
else:
2039
1033
self.disable()
2040
1034
2041
1035
# LastCheckedOK - property
2042
@dbus_service_property(_interface,
2043
signature="s",
1036
@dbus_service_property(_interface, signature="s",
2044
1037
access="readwrite")
2045
1038
def LastCheckedOK_dbus_property(self, value=None):
2046
1039
if value is not None:
2047
1040
self.checked_ok()
2048
1041
return
2049
return datetime_to_dbus(self.last_checked_ok)
2050
2051
# LastCheckerStatus - property
2052
@dbus_service_property(_interface, signature="n", access="read")
2053
def LastCheckerStatus_dbus_property(self):
2054
return dbus.Int16(self.last_checker_status)
2055
2056
# Expires - property
2057
@dbus_service_property(_interface, signature="s", access="read")
2058
def Expires_dbus_property(self):
2059
return datetime_to_dbus(self.expires)
2060
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
2061
1047
# LastApprovalRequest - property
2062
1048
@dbus_service_property(_interface, signature="s", access="read")
2063
1049
def LastApprovalRequest_dbus_property(self):
2064
return datetime_to_dbus(self.last_approval_request)
2065
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
2066
1056
# Timeout - property
2067
@dbus_service_property(_interface,
2068
signature="t",
1057
@dbus_service_property(_interface, signature="t",
2069
1058
access="readwrite")
2070
1059
def Timeout_dbus_property(self, value=None):
2071
1060
if value is None: # get
2072
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2073
old_timeout = self.timeout
1061
return dbus.UInt64(self.timeout_milliseconds())
2074
1062
self.timeout = datetime.timedelta(0, 0, 0, value)
2075
# Reschedule disabling
2076
if self.enabled:
2077
now = datetime.datetime.utcnow()
2078
self.expires += self.timeout - old_timeout
2079
if self.expires <= now:
2080
# The timeout has passed
2081
self.disable()
2082
else:
2083
if (getattr(self, "disable_initiator_tag", None)
2084
is None):
2085
return
2086
GLib.source_remove(self.disable_initiator_tag)
2087
self.disable_initiator_tag = GLib.timeout_add(
2088
int((self.expires - now).total_seconds() * 1000),
2089
self.disable)
2090
2091
# ExtendedTimeout - property
2092
@dbus_service_property(_interface,
2093
signature="t",
2094
access="readwrite")
2095
def ExtendedTimeout_dbus_property(self, value=None):
2096
if value is None: # get
2097
return dbus.UInt64(self.extended_timeout.total_seconds()
2098
* 1000)
2099
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2100
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
2101
1084
# Interval - property
2102
@dbus_service_property(_interface,
2103
signature="t",
1085
@dbus_service_property(_interface, signature="t",
2104
1086
access="readwrite")
2105
1087
def Interval_dbus_property(self, value=None):
2106
1088
if value is None: # get
2107
return dbus.UInt64(self.interval.total_seconds() * 1000)
1089
return dbus.UInt64(self.interval_milliseconds())
2108
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))
2109
1094
if getattr(self, "checker_initiator_tag", None) is None:
2110
1095
return
2111
if self.enabled:
2112
# Reschedule checker run
2113
GLib.source_remove(self.checker_initiator_tag)
2114
self.checker_initiator_tag = GLib.timeout_add(
2115
value, self.start_checker)
2116
self.start_checker() # Start one now, too
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
2117
1101
2118
1102
# Checker - property
2119
@dbus_service_property(_interface,
2120
signature="s",
1103
@dbus_service_property(_interface, signature="s",
2121
1104
access="readwrite")
2122
1105
def Checker_dbus_property(self, value=None):
2123
1106
if value is None: # get
2124
1107
return dbus.String(self.checker_command)
2125
self.checker_command = str(value)
2126
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
2127
1114
# CheckerRunning - property
2128
@dbus_service_property(_interface,
2129
signature="b",
1115
@dbus_service_property(_interface, signature="b",
2130
1116
access="readwrite")
2131
1117
def CheckerRunning_dbus_property(self, value=None):
2132
1118
if value is None: # get
2135
1121
self.start_checker()
2136
1122
else:
2137
1123
self.stop_checker()
2138
1124
2139
1125
# ObjectPath - property
2140
@dbus_annotations(
2141
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2142
"org.freedesktop.DBus.Deprecated": "true"})
2143
1126
@dbus_service_property(_interface, signature="o", access="read")
2144
1127
def ObjectPath_dbus_property(self):
2145
return self.dbus_object_path # is already a dbus.ObjectPath
2146
1128
return self.dbus_object_path # is already a dbus.ObjectPath
1129
2147
1130
# Secret = property
2148
@dbus_annotations(
2149
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2150
"invalidates"})
2151
@dbus_service_property(_interface,
2152
signature="ay",
2153
access="write",
2154
byte_arrays=True)
1131
@dbus_service_property(_interface, signature="ay",
1132
access="write", byte_arrays=True)
2155
1133
def Secret_dbus_property(self, value):
2156
self.secret = bytes(value)
2157
1134
self.secret = str(value)
1135
2158
1136
del _interface
2159
1137
2160
1138
2163
1141
self._pipe = child_pipe
2164
1142
self._pipe.send(('init', fpr, address))
2165
1143
if not self._pipe.recv():
2166
raise KeyError(fpr)
1144
raise KeyError()
2167
1145
2168
1146
def __getattribute__(self, name):
2169
if name == '_pipe':
1147
if(name == '_pipe'):
2170
1148
return super(ProxyClient, self).__getattribute__(name)
2171
1149
self._pipe.send(('getattr', name))
2172
1150
data = self._pipe.recv()
2173
1151
if data[0] == 'data':
2174
1152
return data[1]
2175
1153
if data[0] == 'function':
2176
2177
1154
def func(*args, **kwargs):
2178
1155
self._pipe.send(('funcall', name, args, kwargs))
2179
1156
return self._pipe.recv()[1]
2180
2181
1157
return func
2182
1158
2183
1159
def __setattr__(self, name, value):
2184
if name == '_pipe':
1160
if(name == '_pipe'):
2185
1161
return super(ProxyClient, self).__setattr__(name, value)
2186
1162
self._pipe.send(('setattr', name, value))
2187
1163
2188
1164
2189
1165
class ClientHandler(socketserver.BaseRequestHandler, object):
2190
1166
"""A class to handle client connections.
2191
1167
2192
1168
Instantiated once for each connection to handle it.
2193
1169
Note: This will run in its own forked process."""
2194
1170
2195
1171
def handle(self):
2196
1172
with contextlib.closing(self.server.child_pipe) as child_pipe:
2197
1173
logger.info("TCP connection from: %s",
2198
str(self.client_address))
1174
unicode(self.client_address))
2199
1175
logger.debug("Pipe FD: %d",
2200
1176
self.server.child_pipe.fileno())
2201
1177
2202
session = gnutls.ClientSession(self.request)
2203
2204
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2205
# "+AES-256-CBC", "+SHA1",
2206
# "+COMP-NULL", "+CTYPE-OPENPGP",
2207
# "+DHE-DSS"))
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"))
2208
1192
# Use a fallback default, since this MUST be set.
2209
1193
priority = self.server.gnutls_priority
2210
1194
if priority is None:
2211
1195
priority = "NORMAL"
2212
gnutls.priority_set_direct(session._c_object,
2213
priority.encode("utf-8"),
2214
None)
1196
(gnutls.library.functions
1197
.gnutls_priority_set_direct(session._c_object,
1198
priority, None))
2215
1199
2216
1200
# Start communication using the Mandos protocol
2217
1201
# Get protocol number
2219
1203
logger.debug("Protocol version: %r", line)
2220
1204
try:
2221
1205
if int(line.strip().split()[0]) > 1:
2222
raise RuntimeError(line)
2223
except (ValueError, IndexError, RuntimeError) as error:
1206
raise RuntimeError
1207
except (ValueError, IndexError, RuntimeError), error:
2224
1208
logger.error("Unknown protocol version: %s", error)
2225
1209
return
2226
1210
2227
1211
# Start GnuTLS connection
2228
1212
try:
2229
1213
session.handshake()
2230
except gnutls.Error as error:
1214
except gnutls.errors.GNUTLSError, error:
2231
1215
logger.warning("Handshake failed: %s", error)
2232
1216
# Do not run session.bye() here: the session is not
2233
1217
# established. Just abandon the request.
2237
1221
approval_required = False
2238
1222
try:
2239
1223
try:
2240
fpr = self.fingerprint(
2241
self.peer_certificate(session))
2242
except (TypeError, gnutls.Error) as error:
1224
fpr = self.fingerprint(self.peer_certificate
1225
(session))
1226
except (TypeError, gnutls.errors.GNUTLSError), error:
2243
1227
logger.warning("Bad certificate: %s", error)
2244
1228
return
2245
1229
logger.debug("Fingerprint: %s", fpr)
2249
1233
self.client_address)
2250
1234
except KeyError:
2251
1235
return
2252
1236
2253
1237
if client.approval_delay:
2254
1238
delay = client.approval_delay
2255
1239
client.approvals_pending += 1
2256
1240
approval_required = True
2257
1241
2258
1242
while True:
2259
1243
if not client.enabled:
2260
logger.info("Client %s is disabled",
2261
client.name)
1244
logger.warning("Client %s is disabled",
1245
client.name)
2262
1246
if self.server.use_dbus:
2263
1247
# Emit D-Bus signal
2264
client.Rejected("Disabled")
1248
client.Rejected("Disabled")
2265
1249
return
2266
2267
if client.approved or not client.approval_delay:
2268
# 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
2269
1253
break
2270
elif client.approved is None:
1254
elif client._approved is None:
2271
1255
logger.info("Client %s needs approval",
2272
1256
client.name)
2273
1257
if self.server.use_dbus:
2274
1258
# Emit D-Bus signal
2275
1259
client.NeedApproval(
2276
client.approval_delay.total_seconds()
2277
* 1000, client.approved_by_default)
1260
client.approval_delay_milliseconds(),
1261
client.approved_by_default)
2278
1262
else:
2279
1263
logger.warning("Client %s was not approved",
2280
1264
client.name)
2282
1266
# Emit D-Bus signal
2283
1267
client.Rejected("Denied")
2284
1268
return
2285
2286
# wait until timeout or approved
1269
1270
#wait until timeout or approved
1271
#x = float(client._timedelta_to_milliseconds(delay))
2287
1272
time = datetime.datetime.now()
2288
1273
client.changedstate.acquire()
2289
client.changedstate.wait(delay.total_seconds())
1274
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
2290
1275
client.changedstate.release()
2291
1276
time2 = datetime.datetime.now()
2292
1277
if (time2 - time) >= delay:
2302
1287
break
2303
1288
else:
2304
1289
delay -= time2 - time
2305
2306
try:
2307
session.send(client.secret)
2308
except gnutls.Error as error:
2309
logger.warning("gnutls send failed",
2310
exc_info=error)
2311
return
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
2312
1302
2313
1303
logger.info("Sending secret to %s", client.name)
2314
# bump the timeout using extended_timeout
2315
client.bump_timeout(client.extended_timeout)
1304
# bump the timeout as if seen
1305
client.checked_ok()
2316
1306
if self.server.use_dbus:
2317
1307
# Emit D-Bus signal
2318
1308
client.GotSecret()
2319
1309
2320
1310
finally:
2321
1311
if approval_required:
2322
1312
client.approvals_pending -= 1
2323
1313
try:
2324
1314
session.bye()
2325
except gnutls.Error as error:
2326
logger.warning("GnuTLS bye failed",
2327
exc_info=error)
2328
1315
except (gnutls.errors.GNUTLSError), error:
1316
logger.warning("GnuTLS bye failed")
1317
2329
1318
@staticmethod
2330
1319
def peer_certificate(session):
2331
1320
"Return the peer's OpenPGP certificate as a bytestring"
2332
1321
# If not an OpenPGP certificate...
2333
if (gnutls.certificate_type_get(session._c_object)
2334
!= gnutls.CRT_OPENPGP):
2335
# ...return invalid data
2336
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
2337
1327
list_size = ctypes.c_uint(1)
2338
cert_list = (gnutls.certificate_get_peers
1328
cert_list = (gnutls.library.functions
1329
.gnutls_certificate_get_peers
2339
1330
(session._c_object, ctypes.byref(list_size)))
2340
1331
if not bool(cert_list) and list_size.value != 0:
2341
raise gnutls.Error("error getting peer certificate")
1332
raise gnutls.errors.GNUTLSError("error getting peer"
1333
" certificate")
2342
1334
if list_size.value == 0:
2343
1335
return None
2344
1336
cert = cert_list[0]
2345
1337
return ctypes.string_at(cert.data, cert.size)
2346
1338
2347
1339
@staticmethod
2348
1340
def fingerprint(openpgp):
2349
1341
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2350
1342
# New GnuTLS "datum" with the OpenPGP public key
2351
datum = gnutls.datum_t(
2352
ctypes.cast(ctypes.c_char_p(openpgp),
2353
ctypes.POINTER(ctypes.c_ubyte)),
2354
ctypes.c_uint(len(openpgp)))
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))))
2355
1348
# New empty GnuTLS certificate
2356
crt = gnutls.openpgp_crt_t()
2357
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)))
2358
1352
# Import the OpenPGP public key into the certificate
2359
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2360
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))
2361
1357
# Verify the self signature in the key
2362
1358
crtverify = ctypes.c_uint()
2363
gnutls.openpgp_crt_verify_self(crt, 0,
2364
ctypes.byref(crtverify))
1359
(gnutls.library.functions
1360
.gnutls_openpgp_crt_verify_self(crt, 0,
1361
ctypes.byref(crtverify)))
2365
1362
if crtverify.value != 0:
2366
gnutls.openpgp_crt_deinit(crt)
2367
raise gnutls.CertificateSecurityError("Verify failed")
1363
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1364
raise (gnutls.errors.CertificateSecurityError
1365
("Verify failed"))
2368
1366
# New buffer for the fingerprint
2369
1367
buf = ctypes.create_string_buffer(20)
2370
1368
buf_len = ctypes.c_size_t()
2371
1369
# Get the fingerprint from the certificate into the buffer
2372
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2373
ctypes.byref(buf_len))
1370
(gnutls.library.functions
1371
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1372
ctypes.byref(buf_len)))
2374
1373
# Deinit the certificate
2375
gnutls.openpgp_crt_deinit(crt)
1374
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2376
1375
# Convert the buffer to a Python bytestring
2377
1376
fpr = ctypes.string_at(buf, buf_len.value)
2378
1377
# Convert the bytestring to hexadecimal notation
2379
hex_fpr = binascii.hexlify(fpr).upper()
1378
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2380
1379
return hex_fpr
2381
1380
2382
1381
2383
1382
class MultiprocessingMixIn(object):
2384
1383
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2385
2386
1384
def sub_process_main(self, request, address):
2387
1385
try:
2388
1386
self.finish_request(request, address)
2389
except Exception:
1387
except:
2390
1388
self.handle_error(request, address)
2391
1389
self.close_request(request)
2392
1390
2393
1391
def process_request(self, request, address):
2394
1392
"""Start a new process to process the request."""
2395
proc = multiprocessing.Process(target=self.sub_process_main,
2396
args=(request, address))
2397
proc.start()
2398
return proc
2399
1393
multiprocessing.Process(target = self.sub_process_main,
1394
args = (request, address)).start()
2400
1395
2401
1396
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2402
1397
""" adds a pipe to the MixIn """
2403
2404
1398
def process_request(self, request, client_address):
2405
1399
"""Overrides and wraps the original process_request().
2406
1400
2407
1401
This function creates a new pipe in self.pipe
2408
1402
"""
2409
1403
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2410
1404
2411
proc = MultiprocessingMixIn.process_request(self, request,
2412
client_address)
1405
super(MultiprocessingMixInWithPipe,
1406
self).process_request(request, client_address)
2413
1407
self.child_pipe.close()
2414
self.add_pipe(parent_pipe, proc)
1408
self.add_pipe(parent_pipe)
2415
1409
2416
def add_pipe(self, parent_pipe, proc):
1410
def add_pipe(self, parent_pipe):
2417
1411
"""Dummy function; override as necessary"""
2418
raise NotImplementedError()
2419
1412
raise NotImplementedError
2420
1413
2421
1414
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2422
1415
socketserver.TCPServer, object):
2423
1416
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2424
1417
2425
1418
Attributes:
2426
1419
enabled: Boolean; whether this server is activated yet
2427
1420
interface: None or a network interface name (string)
2428
1421
use_ipv6: Boolean; to use IPv6 or not
2429
1422
"""
2430
2431
1423
def __init__(self, server_address, RequestHandlerClass,
2432
interface=None,
2433
use_ipv6=True,
2434
socketfd=None):
2435
"""If socketfd is set, use that file descriptor instead of
2436
creating a new one with socket.socket().
2437
"""
1424
interface=None, use_ipv6=True):
2438
1425
self.interface = interface
2439
1426
if use_ipv6:
2440
1427
self.address_family = socket.AF_INET6
2441
if socketfd is not None:
2442
# Save the file descriptor
2443
self.socketfd = socketfd
2444
# Save the original socket.socket() function
2445
self.socket_socket = socket.socket
2446
2447
# To implement --socket, we monkey patch socket.socket.
2448
#
2449
# (When socketserver.TCPServer is a new-style class, we
2450
# could make self.socket into a property instead of monkey
2451
# patching socket.socket.)
2452
#
2453
# Create a one-time-only replacement for socket.socket()
2454
@functools.wraps(socket.socket)
2455
def socket_wrapper(*args, **kwargs):
2456
# Restore original function so subsequent calls are
2457
# not affected.
2458
socket.socket = self.socket_socket
2459
del self.socket_socket
2460
# This time only, return a new socket object from the
2461
# saved file descriptor.
2462
return socket.fromfd(self.socketfd, *args, **kwargs)
2463
# Replace socket.socket() function with wrapper
2464
socket.socket = socket_wrapper
2465
# The socketserver.TCPServer.__init__ will call
2466
# socket.socket(), which might be our replacement,
2467
# socket_wrapper(), if socketfd was set.
2468
1428
socketserver.TCPServer.__init__(self, server_address,
2469
1429
RequestHandlerClass)
2470
2471
1430
def server_bind(self):
2472
1431
"""This overrides the normal server_bind() function
2473
1432
to bind to an interface if one was specified, and also NOT to
2474
1433
bind to an address or port if they were not specified."""
2475
global SO_BINDTODEVICE
2476
1434
if self.interface is not None:
2477
1435
if SO_BINDTODEVICE is None:
2478
# Fall back to a hard-coded value which seems to be
2479
# common enough.
2480
logger.warning("SO_BINDTODEVICE not found, trying 25")
2481
SO_BINDTODEVICE = 25
2482
try:
2483
self.socket.setsockopt(
2484
socket.SOL_SOCKET, SO_BINDTODEVICE,
2485
(self.interface + "\0").encode("utf-8"))
2486
except socket.error as error:
2487
if error.errno == errno.EPERM:
2488
logger.error("No permission to bind to"
2489
" interface %s", self.interface)
2490
elif error.errno == errno.ENOPROTOOPT:
2491
logger.error("SO_BINDTODEVICE not available;"
2492
" cannot bind to interface %s",
2493
self.interface)
2494
elif error.errno == errno.ENODEV:
2495
logger.error("Interface %s does not exist,"
2496
" cannot bind", self.interface)
2497
else:
2498
raise
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
2499
1456
# Only bind(2) the socket if we really need to.
2500
1457
if self.server_address[0] or self.server_address[1]:
2501
1458
if not self.server_address[0]:
2502
1459
if self.address_family == socket.AF_INET6:
2503
any_address = "::" # in6addr_any
1460
any_address = "::" # in6addr_any
2504
1461
else:
2505
any_address = "0.0.0.0" # INADDR_ANY
1462
any_address = socket.INADDR_ANY
2506
1463
self.server_address = (any_address,
2507
1464
self.server_address[1])
2508
1465
elif not self.server_address[1]:
2509
self.server_address = (self.server_address[0], 0)
1466
self.server_address = (self.server_address[0],
1467
0)
2510
1468
# if self.interface:
2511
1469
# self.server_address = (self.server_address[0],
2512
1470
# 0, # port
2518
1476
2519
1477
class MandosServer(IPv6_TCPServer):
2520
1478
"""Mandos server.
2521
1479
2522
1480
Attributes:
2523
1481
clients: set of Client objects
2524
1482
gnutls_priority GnuTLS priority string
2525
1483
use_dbus: Boolean; to emit D-Bus signals or not
2526
2527
Assumes a GLib.MainLoop event loop.
1484
1485
Assumes a gobject.MainLoop event loop.
2528
1486
"""
2529
2530
1487
def __init__(self, server_address, RequestHandlerClass,
2531
interface=None,
2532
use_ipv6=True,
2533
clients=None,
2534
gnutls_priority=None,
2535
use_dbus=True,
2536
socketfd=None):
1488
interface=None, use_ipv6=True, clients=None,
1489
gnutls_priority=None, use_dbus=True):
2537
1490
self.enabled = False
2538
1491
self.clients = clients
2539
1492
if self.clients is None:
2540
self.clients = {}
1493
self.clients = set()
2541
1494
self.use_dbus = use_dbus
2542
1495
self.gnutls_priority = gnutls_priority
2543
1496
IPv6_TCPServer.__init__(self, server_address,
2544
1497
RequestHandlerClass,
2545
interface=interface,
2546
use_ipv6=use_ipv6,
2547
socketfd=socketfd)
2548
1498
interface = interface,
1499
use_ipv6 = use_ipv6)
2549
1500
def server_activate(self):
2550
1501
if self.enabled:
2551
1502
return socketserver.TCPServer.server_activate(self)
2552
2553
1503
def enable(self):
2554
1504
self.enabled = True
2555
2556
def add_pipe(self, parent_pipe, proc):
1505
def add_pipe(self, parent_pipe):
2557
1506
# Call "handle_ipc" for both data and EOF events
2558
GLib.io_add_watch(
2559
parent_pipe.fileno(),
2560
GLib.IO_IN | GLib.IO_HUP,
2561
functools.partial(self.handle_ipc,
2562
parent_pipe=parent_pipe,
2563
proc=proc))
2564
2565
def handle_ipc(self, source, condition,
2566
parent_pipe=None,
2567
proc=None,
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,
2568
1513
client_object=None):
2569
# error, or the other end of multiprocessing.Pipe has closed
2570
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2571
# Wait for other process to exit
2572
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):
2573
1530
return False
2574
1531
2575
1532
# Read a request from the child
2576
1533
request = parent_pipe.recv()
2577
1534
command = request[0]
2578
1535
2579
1536
if command == 'init':
2580
1537
fpr = request[1]
2581
1538
address = request[2]
2582
2583
for c in self.clients.values():
1539
1540
for c in self.clients:
2584
1541
if c.fingerprint == fpr:
2585
1542
client = c
2586
1543
break
2587
1544
else:
2588
logger.info("Client not found for fingerprint: %s, ad"
2589
"dress: %s", fpr, address)
1545
logger.warning("Client not found for fingerprint: %s, ad"
1546
"dress: %s", fpr, address)
2590
1547
if self.use_dbus:
2591
1548
# Emit D-Bus signal
2592
mandos_dbus_service.ClientNotFound(fpr,
2593
address[0])
1549
mandos_dbus_service.ClientNotFound(fpr, address[0])
2594
1550
parent_pipe.send(False)
2595
1551
return False
2596
2597
GLib.io_add_watch(
2598
parent_pipe.fileno(),
2599
GLib.IO_IN | GLib.IO_HUP,
2600
functools.partial(self.handle_ipc,
2601
parent_pipe=parent_pipe,
2602
proc=proc,
2603
client_object=client))
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))
2604
1558
parent_pipe.send(True)
2605
# remove the old hook in favor of the new above hook on
2606
# same fileno
1559
# remove the old hook in favor of the new above hook on same fileno
2607
1560
return False
2608
1561
if command == 'funcall':
2609
1562
funcname = request[1]
2610
1563
args = request[2]
2611
1564
kwargs = request[3]
2612
2613
parent_pipe.send(('data', getattr(client_object,
2614
funcname)(*args,
2615
**kwargs)))
1565
1566
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
2616
1567
2617
1568
if command == 'getattr':
2618
1569
attrname = request[1]
2619
if isinstance(client_object.__getattribute__(attrname),
2620
collections.Callable):
2621
parent_pipe.send(('function', ))
1570
if callable(client_object.__getattribute__(attrname)):
1571
parent_pipe.send(('function',))
2622
1572
else:
2623
parent_pipe.send((
2624
'data', client_object.__getattribute__(attrname)))
2625
1573
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1574
2626
1575
if command == 'setattr':
2627
1576
attrname = request[1]
2628
1577
value = request[2]
2631
1580
return True
2632
1581
2633
1582
2634
def rfc3339_duration_to_delta(duration):
2635
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2636
2637
>>> rfc3339_duration_to_delta("P7D")
2638
datetime.timedelta(7)
2639
>>> rfc3339_duration_to_delta("PT60S")
2640
datetime.timedelta(0, 60)
2641
>>> rfc3339_duration_to_delta("PT60M")
2642
datetime.timedelta(0, 3600)
2643
>>> rfc3339_duration_to_delta("PT24H")
2644
datetime.timedelta(1)
2645
>>> rfc3339_duration_to_delta("P1W")
2646
datetime.timedelta(7)
2647
>>> rfc3339_duration_to_delta("PT5M30S")
2648
datetime.timedelta(0, 330)
2649
>>> rfc3339_duration_to_delta("P1DT3M20S")
2650
datetime.timedelta(1, 200)
2651
"""
2652
2653
# Parsing an RFC 3339 duration with regular expressions is not
2654
# possible - there would have to be multiple places for the same
2655
# values, like seconds. The current code, while more esoteric, is
2656
# cleaner without depending on a parsing library. If Python had a
2657
# built-in library for parsing we would use it, but we'd like to
2658
# avoid excessive use of external libraries.
2659
2660
# New type for defining tokens, syntax, and semantics all-in-one
2661
Token = collections.namedtuple("Token", (
2662
"regexp", # To match token; if "value" is not None, must have
2663
# a "group" containing digits
2664
"value", # datetime.timedelta or None
2665
"followers")) # Tokens valid after this token
2666
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2667
# the "duration" ABNF definition in RFC 3339, Appendix A.
2668
token_end = Token(re.compile(r"$"), None, frozenset())
2669
token_second = Token(re.compile(r"(\d+)S"),
2670
datetime.timedelta(seconds=1),
2671
frozenset((token_end, )))
2672
token_minute = Token(re.compile(r"(\d+)M"),
2673
datetime.timedelta(minutes=1),
2674
frozenset((token_second, token_end)))
2675
token_hour = Token(re.compile(r"(\d+)H"),
2676
datetime.timedelta(hours=1),
2677
frozenset((token_minute, token_end)))
2678
token_time = Token(re.compile(r"T"),
2679
None,
2680
frozenset((token_hour, token_minute,
2681
token_second)))
2682
token_day = Token(re.compile(r"(\d+)D"),
2683
datetime.timedelta(days=1),
2684
frozenset((token_time, token_end)))
2685
token_month = Token(re.compile(r"(\d+)M"),
2686
datetime.timedelta(weeks=4),
2687
frozenset((token_day, token_end)))
2688
token_year = Token(re.compile(r"(\d+)Y"),
2689
datetime.timedelta(weeks=52),
2690
frozenset((token_month, token_end)))
2691
token_week = Token(re.compile(r"(\d+)W"),
2692
datetime.timedelta(weeks=1),
2693
frozenset((token_end, )))
2694
token_duration = Token(re.compile(r"P"), None,
2695
frozenset((token_year, token_month,
2696
token_day, token_time,
2697
token_week)))
2698
# Define starting values:
2699
# Value so far
2700
value = datetime.timedelta()
2701
found_token = None
2702
# Following valid tokens
2703
followers = frozenset((token_duration, ))
2704
# String left to parse
2705
s = duration
2706
# Loop until end token is found
2707
while found_token is not token_end:
2708
# Search for any currently valid tokens
2709
for token in followers:
2710
match = token.regexp.match(s)
2711
if match is not None:
2712
# Token found
2713
if token.value is not None:
2714
# Value found, parse digits
2715
factor = int(match.group(1), 10)
2716
# Add to value so far
2717
value += factor * token.value
2718
# Strip token from string
2719
s = token.regexp.sub("", s, 1)
2720
# Go to found token
2721
found_token = token
2722
# Set valid next tokens
2723
followers = found_token.followers
2724
break
2725
else:
2726
# No currently valid tokens were found
2727
raise ValueError("Invalid RFC 3339 duration: {!r}"
2728
.format(duration))
2729
# End token found
2730
return value
2731
2732
2733
1583
def string_to_delta(interval):
2734
1584
"""Parse a string and return a datetime.timedelta
2735
1585
2736
1586
>>> string_to_delta('7d')
2737
1587
datetime.timedelta(7)
2738
1588
>>> string_to_delta('60s')
2746
1596
>>> string_to_delta('5m 30s')
2747
1597
datetime.timedelta(0, 330)
2748
1598
"""
2749
2750
try:
2751
return rfc3339_duration_to_delta(interval)
2752
except ValueError:
2753
pass
2754
2755
1599
timevalue = datetime.timedelta(0)
2756
1600
for s in interval.split():
2757
1601
try:
2758
suffix = s[-1]
1602
suffix = unicode(s[-1])
2759
1603
value = int(s[:-1])
2760
1604
if suffix == "d":
2761
1605
delta = datetime.timedelta(value)
2768
1612
elif suffix == "w":
2769
1613
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2770
1614
else:
2771
raise ValueError("Unknown suffix {!r}".format(suffix))
2772
except IndexError as e:
1615
raise ValueError("Unknown suffix %r" % suffix)
1616
except (ValueError, IndexError), e:
2773
1617
raise ValueError(*(e.args))
2774
1618
timevalue += delta
2775
1619
return timevalue
2776
1620
2777
1621
2778
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):
2779
1647
"""See daemon(3). Standard BSD Unix function.
2780
1648
2781
1649
This should really exist as os.daemon, but it doesn't (yet)."""
2782
1650
if os.fork():
2783
1651
sys.exit()
2788
1656
sys.exit()
2789
1657
if not noclose:
2790
1658
# Close all standard open file descriptors
2791
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1659
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2792
1660
if not stat.S_ISCHR(os.fstat(null).st_mode):
2793
1661
raise OSError(errno.ENODEV,
2794
"{} not a character device"
2795
.format(os.devnull))
1662
"%s not a character device"
1663
% os.path.devnull)
2796
1664
os.dup2(null, sys.stdin.fileno())
2797
1665
os.dup2(null, sys.stdout.fileno())
2798
1666
os.dup2(null, sys.stderr.fileno())
2801
1669
2802
1670
2803
1671
def main():
2804
1672
2805
1673
##################################################################
2806
1674
# Parsing of options, both command line and config file
2807
2808
parser = argparse.ArgumentParser()
2809
parser.add_argument("-v", "--version", action="version",
2810
version="%(prog)s {}".format(version),
2811
help="show version number and exit")
2812
parser.add_argument("-i", "--interface", metavar="IF",
2813
help="Bind to interface IF")
2814
parser.add_argument("-a", "--address",
2815
help="Address to listen for requests on")
2816
parser.add_argument("-p", "--port", type=int,
2817
help="Port number to receive requests on")
2818
parser.add_argument("--check", action="store_true",
2819
help="Run self-test")
2820
parser.add_argument("--debug", action="store_true",
2821
help="Debug mode; run in foreground and log"
2822
" to terminal", default=None)
2823
parser.add_argument("--debuglevel", metavar="LEVEL",
2824
help="Debug level for stdout output")
2825
parser.add_argument("--priority", help="GnuTLS"
2826
" priority string (see GnuTLS documentation)")
2827
parser.add_argument("--servicename",
2828
metavar="NAME", help="Zeroconf service name")
2829
parser.add_argument("--configdir",
2830
default="/etc/mandos", metavar="DIR",
2831
help="Directory to search for configuration"
2832
" files")
2833
parser.add_argument("--no-dbus", action="store_false",
2834
dest="use_dbus", help="Do not provide D-Bus"
2835
" system bus interface", default=None)
2836
parser.add_argument("--no-ipv6", action="store_false",
2837
dest="use_ipv6", help="Do not use IPv6",
2838
default=None)
2839
parser.add_argument("--no-restore", action="store_false",
2840
dest="restore", help="Do not restore stored"
2841
" state", default=None)
2842
parser.add_argument("--socket", type=int,
2843
help="Specify a file descriptor to a network"
2844
" socket to use instead of creating one")
2845
parser.add_argument("--statedir", metavar="DIR",
2846
help="Directory to save/restore state in")
2847
parser.add_argument("--foreground", action="store_true",
2848
help="Run in foreground", default=None)
2849
parser.add_argument("--no-zeroconf", action="store_false",
2850
dest="zeroconf", help="Do not use Zeroconf",
2851
default=None)
2852
2853
options = parser.parse_args()
2854
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
2855
1705
if options.check:
2856
1706
import doctest
2857
fail_count, test_count = doctest.testmod()
2858
sys.exit(os.EX_OK if fail_count == 0 else 1)
2859
1707
doctest.testmod()
1708
sys.exit()
1709
2860
1710
# Default values for config file for server-global settings
2861
server_defaults = {"interface": "",
2862
"address": "",
2863
"port": "",
2864
"debug": "False",
2865
"priority":
2866
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2867
":+SIGN-DSA-SHA256",
2868
"servicename": "Mandos",
2869
"use_dbus": "True",
2870
"use_ipv6": "True",
2871
"debuglevel": "",
2872
"restore": "True",
2873
"socket": "",
2874
"statedir": "/var/lib/mandos",
2875
"foreground": "False",
2876
"zeroconf": "True",
2877
}
2878
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
2879
1723
# Parse config file for server-global settings
2880
1724
server_config = configparser.SafeConfigParser(server_defaults)
2881
1725
del server_defaults
2882
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1726
server_config.read(os.path.join(options.configdir,
1727
"mandos.conf"))
2883
1728
# Convert the SafeConfigParser object to a dict
2884
1729
server_settings = server_config.defaults()
2885
1730
# Use the appropriate methods on the non-string config options
2886
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2887
"foreground", "zeroconf"):
1731
for option in ("debug", "use_dbus", "use_ipv6"):
2888
1732
server_settings[option] = server_config.getboolean("DEFAULT",
2889
1733
option)
2890
1734
if server_settings["port"]:
2891
1735
server_settings["port"] = server_config.getint("DEFAULT",
2892
1736
"port")
2893
if server_settings["socket"]:
2894
server_settings["socket"] = server_config.getint("DEFAULT",
2895
"socket")
2896
# Later, stdin will, and stdout and stderr might, be dup'ed
2897
# over with an opened os.devnull. But we don't want this to
2898
# happen with a supplied network socket.
2899
if 0 <= server_settings["socket"] <= 2:
2900
server_settings["socket"] = os.dup(server_settings
2901
["socket"])
2902
1737
del server_config
2903
1738
2904
1739
# Override the settings from the config file with command line
2905
1740
# options, if set.
2906
1741
for option in ("interface", "address", "port", "debug",
2907
"priority", "servicename", "configdir", "use_dbus",
2908
"use_ipv6", "debuglevel", "restore", "statedir",
2909
"socket", "foreground", "zeroconf"):
1742
"priority", "servicename", "configdir",
1743
"use_dbus", "use_ipv6", "debuglevel"):
2910
1744
value = getattr(options, option)
2911
1745
if value is not None:
2912
1746
server_settings[option] = value
2913
1747
del options
2914
1748
# Force all strings to be unicode
2915
1749
for option in server_settings.keys():
2916
if isinstance(server_settings[option], bytes):
2917
server_settings[option] = (server_settings[option]
2918
.decode("utf-8"))
2919
# Force all boolean options to be boolean
2920
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2921
"foreground", "zeroconf"):
2922
server_settings[option] = bool(server_settings[option])
2923
# Debug implies foreground
2924
if server_settings["debug"]:
2925
server_settings["foreground"] = True
1750
if type(server_settings[option]) is str:
1751
server_settings[option] = unicode(server_settings[option])
2926
1752
# Now we have our good server settings in "server_settings"
2927
1753
2928
1754
##################################################################
2929
2930
if (not server_settings["zeroconf"]
2931
and not (server_settings["port"]
2932
or server_settings["socket"] != "")):
2933
parser.error("Needs port or socket to work without Zeroconf")
2934
1755
2935
1756
# For convenience
2936
1757
debug = server_settings["debug"]
2937
1758
debuglevel = server_settings["debuglevel"]
2938
1759
use_dbus = server_settings["use_dbus"]
2939
1760
use_ipv6 = server_settings["use_ipv6"]
2940
stored_state_path = os.path.join(server_settings["statedir"],
2941
stored_state_file)
2942
foreground = server_settings["foreground"]
2943
zeroconf = server_settings["zeroconf"]
2944
2945
if debug:
2946
initlogger(debug, logging.DEBUG)
2947
else:
2948
if not debuglevel:
2949
initlogger(debug)
2950
else:
2951
level = getattr(logging, debuglevel.upper())
2952
initlogger(debug, level)
2953
1761
2954
1762
if server_settings["servicename"] != "Mandos":
2955
syslogger.setFormatter(
2956
logging.Formatter('Mandos ({}) [%(process)d]:'
2957
' %(levelname)s: %(message)s'.format(
2958
server_settings["servicename"])))
2959
1763
syslogger.setFormatter(logging.Formatter
1764
('Mandos (%s) [%%(process)d]:'
1765
' %%(levelname)s: %%(message)s'
1766
% server_settings["servicename"]))
1767
2960
1768
# Parse config file with clients
2961
client_config = configparser.SafeConfigParser(Client
2962
.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)
2963
1777
client_config.read(os.path.join(server_settings["configdir"],
2964
1778
"clients.conf"))
2965
1779
2966
1780
global mandos_dbus_service
2967
1781
mandos_dbus_service = None
2968
2969
socketfd = None
2970
if server_settings["socket"] != "":
2971
socketfd = server_settings["socket"]
2972
tcp_server = MandosServer(
2973
(server_settings["address"], server_settings["port"]),
2974
ClientHandler,
2975
interface=(server_settings["interface"] or None),
2976
use_ipv6=use_ipv6,
2977
gnutls_priority=server_settings["priority"],
2978
use_dbus=use_dbus,
2979
socketfd=socketfd)
2980
if not foreground:
2981
pidfilename = "/run/mandos.pid"
2982
if not os.path.isdir("/run/."):
2983
pidfilename = "/var/run/mandos.pid"
2984
pidfile = None
2985
try:
2986
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2987
except IOError as e:
2988
logger.error("Could not open file %r", pidfilename,
2989
exc_info=e)
2990
2991
for name, group in (("_mandos", "_mandos"),
2992
("mandos", "mandos"),
2993
("nobody", "nogroup")):
2994
try:
2995
uid = pwd.getpwnam(name).pw_uid
2996
gid = pwd.getpwnam(group).pw_gid
2997
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
2998
1806
except KeyError:
2999
continue
3000
else:
3001
uid = 65534
3002
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
3003
1813
try:
3004
1814
os.setgid(gid)
3005
1815
os.setuid(uid)
3006
if debug:
3007
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3008
gid))
3009
except OSError as error:
3010
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3011
.format(uid, gid, os.strerror(error.errno)))
3012
if error.errno != errno.EPERM:
3013
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)
3014
1827
3015
1828
if debug:
3016
1829
# Enable all possible GnuTLS debugging
3017
1830
3018
1831
# "Use a log level over 10 to enable all debugging options."
3019
1832
# - GnuTLS manual
3020
gnutls.global_set_log_level(11)
3021
3022
@gnutls.log_func
1833
gnutls.library.functions.gnutls_global_set_log_level(11)
1834
1835
@gnutls.library.types.gnutls_log_func
3023
1836
def debug_gnutls(level, string):
3024
1837
logger.debug("GnuTLS: %s", string[:-1])
3025
3026
gnutls.global_set_log_function(debug_gnutls)
3027
1838
1839
(gnutls.library.functions
1840
.gnutls_global_set_log_function(debug_gnutls))
1841
3028
1842
# Redirect stdin so all checkers get /dev/null
3029
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1843
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3030
1844
os.dup2(null, sys.stdin.fileno())
3031
1845
if null > 2:
3032
1846
os.close(null)
3033
1847
else:
1848
# No console logging
1849
logger.removeHandler(console)
1850
3034
1851
# Need to fork before connecting to D-Bus
3035
if not foreground:
1852
if not debug:
3036
1853
# Close all input and output, do double fork, etc.
3037
1854
daemon()
3038
3039
# multiprocessing will use threads, so before we use GLib we need
3040
# to inform GLib that threads will be used.
3041
GLib.threads_init()
3042
1855
3043
1856
global main_loop
3044
1857
# From the Avahi example code
3045
DBusGMainLoop(set_as_default=True)
3046
main_loop = GLib.MainLoop()
1858
DBusGMainLoop(set_as_default=True )
1859
main_loop = gobject.MainLoop()
3047
1860
bus = dbus.SystemBus()
3048
1861
# End of Avahi example code
3049
1862
if use_dbus:
3050
1863
try:
3051
bus_name = dbus.service.BusName("se.recompile.Mandos",
3052
bus,
3053
do_not_queue=True)
3054
old_bus_name = dbus.service.BusName(
3055
"se.bsnet.fukt.Mandos", bus,
3056
do_not_queue=True)
3057
except dbus.exceptions.DBusException as e:
3058
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")
3059
1868
use_dbus = False
3060
1869
server_settings["use_dbus"] = False
3061
1870
tcp_server.use_dbus = False
3062
if zeroconf:
3063
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3064
service = AvahiServiceToSyslog(
3065
name=server_settings["servicename"],
3066
servicetype="_mandos._tcp",
3067
protocol=protocol,
3068
bus=bus)
3069
if server_settings["interface"]:
3070
service.interface = if_nametoindex(
3071
server_settings["interface"].encode("utf-8"))
3072
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
3073
1879
global multiprocessing_manager
3074
1880
multiprocessing_manager = multiprocessing.Manager()
3075
1881
3076
1882
client_class = Client
3077
1883
if use_dbus:
3078
client_class = functools.partial(ClientDBus, bus=bus)
3079
3080
client_settings = Client.config_parser(client_config)
3081
old_client_settings = {}
3082
clients_data = {}
3083
3084
# This is used to redirect stdout and stderr for checker processes
3085
global wnull
3086
wnull = open(os.devnull, "w") # A writable /dev/null
3087
# Only used if server is running in foreground but not in debug
3088
# mode
3089
if debug or not foreground:
3090
wnull.close()
3091
3092
# Get client data and settings from last running state.
3093
if server_settings["restore"]:
3094
try:
3095
with open(stored_state_path, "rb") as stored_state:
3096
if sys.version_info.major == 2:
3097
clients_data, old_client_settings = pickle.load(
3098
stored_state)
3099
else:
3100
bytes_clients_data, bytes_old_client_settings = (
3101
pickle.load(stored_state, encoding="bytes"))
3102
# Fix bytes to strings
3103
# clients_data
3104
# .keys()
3105
clients_data = {(key.decode("utf-8")
3106
if isinstance(key, bytes)
3107
else key): value
3108
for key, value in
3109
bytes_clients_data.items()}
3110
del bytes_clients_data
3111
for key in clients_data:
3112
value = {(k.decode("utf-8")
3113
if isinstance(k, bytes) else k): v
3114
for k, v in
3115
clients_data[key].items()}
3116
clients_data[key] = value
3117
# .client_structure
3118
value["client_structure"] = [
3119
(s.decode("utf-8")
3120
if isinstance(s, bytes)
3121
else s) for s in
3122
value["client_structure"]]
3123
# .name & .host
3124
for k in ("name", "host"):
3125
if isinstance(value[k], bytes):
3126
value[k] = value[k].decode("utf-8")
3127
# old_client_settings
3128
# .keys()
3129
old_client_settings = {
3130
(key.decode("utf-8")
3131
if isinstance(key, bytes)
3132
else key): value
3133
for key, value in
3134
bytes_old_client_settings.items()}
3135
del bytes_old_client_settings
3136
# .host
3137
for value in old_client_settings.values():
3138
if isinstance(value["host"], bytes):
3139
value["host"] = (value["host"]
3140
.decode("utf-8"))
3141
os.remove(stored_state_path)
3142
except IOError as e:
3143
if e.errno == errno.ENOENT:
3144
logger.warning("Could not load persistent state:"
3145
" {}".format(os.strerror(e.errno)))
3146
else:
3147
logger.critical("Could not load persistent state:",
3148
exc_info=e)
3149
raise
3150
except EOFError as e:
3151
logger.warning("Could not load persistent state: "
3152
"EOFError:",
3153
exc_info=e)
3154
3155
with PGPEngine() as pgp:
3156
for client_name, client in clients_data.items():
3157
# Skip removed clients
3158
if client_name not in client_settings:
3159
continue
3160
3161
# Decide which value to use after restoring saved state.
3162
# We have three different values: Old config file,
3163
# new config file, and saved state.
3164
# New config value takes precedence if it differs from old
3165
# config value, otherwise use saved state.
3166
for name, value in client_settings[client_name].items():
3167
try:
3168
# For each value in new config, check if it
3169
# differs from the old config value (Except for
3170
# the "secret" attribute)
3171
if (name != "secret"
3172
and (value !=
3173
old_client_settings[client_name][name])):
3174
client[name] = value
3175
except KeyError:
3176
pass
3177
3178
# Clients who has passed its expire date can still be
3179
# enabled if its last checker was successful. A Client
3180
# whose checker succeeded before we stored its state is
3181
# assumed to have successfully run all checkers during
3182
# downtime.
3183
if client["enabled"]:
3184
if datetime.datetime.utcnow() >= client["expires"]:
3185
if not client["last_checked_ok"]:
3186
logger.warning(
3187
"disabling client {} - Client never "
3188
"performed a successful checker".format(
3189
client_name))
3190
client["enabled"] = False
3191
elif client["last_checker_status"] != 0:
3192
logger.warning(
3193
"disabling client {} - Client last"
3194
" checker failed with error code"
3195
" {}".format(
3196
client_name,
3197
client["last_checker_status"]))
3198
client["enabled"] = False
3199
else:
3200
client["expires"] = (
3201
datetime.datetime.utcnow()
3202
+ client["timeout"])
3203
logger.debug("Last checker succeeded,"
3204
" keeping {} enabled".format(
3205
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):
3206
1892
try:
3207
client["secret"] = pgp.decrypt(
3208
client["encrypted_secret"],
3209
client_settings[client_name]["secret"])
3210
except PGPError:
3211
# If decryption fails, we use secret from new settings
3212
logger.debug("Failed to decrypt {} old secret".format(
3213
client_name))
3214
client["secret"] = (client_settings[client_name]
3215
["secret"])
3216
3217
# Add/remove clients based on new changes made to config
3218
for client_name in (set(old_client_settings)
3219
- set(client_settings)):
3220
del clients_data[client_name]
3221
for client_name in (set(client_settings)
3222
- set(old_client_settings)):
3223
clients_data[client_name] = client_settings[client_name]
3224
3225
# Create all client objects
3226
for client_name, client in clients_data.items():
3227
tcp_server.clients[client_name] = client_class(
3228
name=client_name,
3229
settings=client,
3230
server_settings=server_settings)
3231
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()))
3232
1902
if not tcp_server.clients:
3233
1903
logger.warning("No clients defined")
3234
3235
if not foreground:
3236
if pidfile is not None:
3237
pid = os.getpid()
3238
try:
3239
with pidfile:
3240
print(pid, file=pidfile)
3241
except IOError:
3242
logger.error("Could not write to file %r with PID %d",
3243
pidfilename, pid)
3244
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
3245
1917
del pidfilename
3246
3247
for termsig in (signal.SIGHUP, signal.SIGTERM):
3248
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3249
lambda: main_loop.quit() and False)
3250
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
3251
1924
if use_dbus:
3252
3253
@alternate_dbus_interfaces(
3254
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3255
class MandosDBusService(DBusObjectWithObjectManager):
1925
class MandosDBusService(dbus.service.Object):
3256
1926
"""A D-Bus proxy object"""
3257
3258
1927
def __init__(self):
3259
1928
dbus.service.Object.__init__(self, bus, "/")
3260
3261
_interface = "se.recompile.Mandos"
3262
1929
_interface = "se.bsnet.fukt.Mandos"
1930
3263
1931
@dbus.service.signal(_interface, signature="o")
3264
1932
def ClientAdded(self, objpath):
3265
1933
"D-Bus signal"
3266
1934
pass
3267
1935
3268
1936
@dbus.service.signal(_interface, signature="ss")
3269
1937
def ClientNotFound(self, fingerprint, address):
3270
1938
"D-Bus signal"
3271
1939
pass
3272
3273
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3274
"true"})
1940
3275
1941
@dbus.service.signal(_interface, signature="os")
3276
1942
def ClientRemoved(self, objpath, name):
3277
1943
"D-Bus signal"
3278
1944
pass
3279
3280
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3281
"true"})
1945
3282
1946
@dbus.service.method(_interface, out_signature="ao")
3283
1947
def GetAllClients(self):
3284
1948
"D-Bus method"
3285
return dbus.Array(c.dbus_object_path for c in
3286
tcp_server.clients.values())
3287
3288
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3289
"true"})
1949
return dbus.Array(c.dbus_object_path
1950
for c in tcp_server.clients)
1951
3290
1952
@dbus.service.method(_interface,
3291
1953
out_signature="a{oa{sv}}")
3292
1954
def GetAllClientsWithProperties(self):
3293
1955
"D-Bus method"
3294
1956
return dbus.Dictionary(
3295
{c.dbus_object_path: c.GetAll(
3296
"se.recompile.Mandos.Client")
3297
for c in tcp_server.clients.values()},
1957
((c.dbus_object_path, c.GetAll(""))
1958
for c in tcp_server.clients),
3298
1959
signature="oa{sv}")
3299
1960
3300
1961
@dbus.service.method(_interface, in_signature="o")
3301
1962
def RemoveClient(self, object_path):
3302
1963
"D-Bus method"
3303
for c in tcp_server.clients.values():
1964
for c in tcp_server.clients:
3304
1965
if c.dbus_object_path == object_path:
3305
del tcp_server.clients[c.name]
1966
tcp_server.clients.remove(c)
3306
1967
c.remove_from_connection()
3307
# Don't signal the disabling
1968
# Don't signal anything except ClientRemoved
3308
1969
c.disable(quiet=True)
3309
# Emit D-Bus signal for removal
3310
self.client_removed_signal(c)
1970
# Emit D-Bus signal
1971
self.ClientRemoved(object_path, c.name)
3311
1972
return
3312
1973
raise KeyError(object_path)
3313
1974
3314
1975
del _interface
3315
3316
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3317
out_signature="a{oa{sa{sv}}}")
3318
def GetManagedObjects(self):
3319
"""D-Bus method"""
3320
return dbus.Dictionary(
3321
{client.dbus_object_path:
3322
dbus.Dictionary(
3323
{interface: client.GetAll(interface)
3324
for interface in
3325
client._get_all_interface_names()})
3326
for client in tcp_server.clients.values()})
3327
3328
def client_added_signal(self, client):
3329
"""Send the new standard signal and the old signal"""
3330
if use_dbus:
3331
# New standard signal
3332
self.InterfacesAdded(
3333
client.dbus_object_path,
3334
dbus.Dictionary(
3335
{interface: client.GetAll(interface)
3336
for interface in
3337
client._get_all_interface_names()}))
3338
# Old signal
3339
self.ClientAdded(client.dbus_object_path)
3340
3341
def client_removed_signal(self, client):
3342
"""Send the new standard signal and the old signal"""
3343
if use_dbus:
3344
# New standard signal
3345
self.InterfacesRemoved(
3346
client.dbus_object_path,
3347
client._get_all_interface_names())
3348
# Old signal
3349
self.ClientRemoved(client.dbus_object_path,
3350
client.name)
3351
1976
3352
1977
mandos_dbus_service = MandosDBusService()
3353
3354
# Save modules to variables to exempt the modules from being
3355
# unloaded before the function registered with atexit() is run.
3356
mp = multiprocessing
3357
wn = wnull
3358
1978
3359
1979
def cleanup():
3360
1980
"Cleanup function; run on exit"
3361
if zeroconf:
3362
service.cleanup()
3363
3364
mp.active_children()
3365
wn.close()
3366
if not (tcp_server.clients or client_settings):
3367
return
3368
3369
# Store client before exiting. Secrets are encrypted with key
3370
# based on what config file has. If config file is
3371
# removed/edited, old secret will thus be unrecovable.
3372
clients = {}
3373
with PGPEngine() as pgp:
3374
for client in tcp_server.clients.values():
3375
key = client_settings[client.name]["secret"]
3376
client.encrypted_secret = pgp.encrypt(client.secret,
3377
key)
3378
client_dict = {}
3379
3380
# A list of attributes that can not be pickled
3381
# + secret.
3382
exclude = {"bus", "changedstate", "secret",
3383
"checker", "server_settings"}
3384
for name, typ in inspect.getmembers(dbus.service
3385
.Object):
3386
exclude.add(name)
3387
3388
client_dict["encrypted_secret"] = (client
3389
.encrypted_secret)
3390
for attr in client.client_structure:
3391
if attr not in exclude:
3392
client_dict[attr] = getattr(client, attr)
3393
3394
clients[client.name] = client_dict
3395
del client_settings[client.name]["secret"]
3396
3397
try:
3398
with tempfile.NamedTemporaryFile(
3399
mode='wb',
3400
suffix=".pickle",
3401
prefix='clients-',
3402
dir=os.path.dirname(stored_state_path),
3403
delete=False) as stored_state:
3404
pickle.dump((clients, client_settings), stored_state,
3405
protocol=2)
3406
tempname = stored_state.name
3407
os.rename(tempname, stored_state_path)
3408
except (IOError, OSError) as e:
3409
if not debug:
3410
try:
3411
os.remove(tempname)
3412
except NameError:
3413
pass
3414
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3415
logger.warning("Could not save persistent state: {}"
3416
.format(os.strerror(e.errno)))
3417
else:
3418
logger.warning("Could not save persistent state:",
3419
exc_info=e)
3420
raise
3421
3422
# Delete all clients, and settings from config
1981
service.cleanup()
1982
3423
1983
while tcp_server.clients:
3424
name, client = tcp_server.clients.popitem()
1984
client = tcp_server.clients.pop()
3425
1985
if use_dbus:
3426
1986
client.remove_from_connection()
3427
# Don't signal the disabling
1987
client.disable_hook = None
1988
# Don't signal anything except ClientRemoved
3428
1989
client.disable(quiet=True)
3429
# Emit D-Bus signal for removal
3430
1990
if use_dbus:
3431
mandos_dbus_service.client_removed_signal(client)
3432
client_settings.clear()
3433
1991
# Emit D-Bus signal
1992
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1993
client.name)
1994
3434
1995
atexit.register(cleanup)
3435
3436
for client in tcp_server.clients.values():
1996
1997
for client in tcp_server.clients:
3437
1998
if use_dbus:
3438
# Emit D-Bus signal for adding
3439
mandos_dbus_service.client_added_signal(client)
3440
# Need to initiate checking of clients
3441
if client.enabled:
3442
client.init_checker()
3443
1999
# Emit D-Bus signal
2000
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2001
client.enable()
2002
3444
2003
tcp_server.enable()
3445
2004
tcp_server.server_activate()
3446
2005
3447
2006
# Find out what port we got
3448
if zeroconf:
3449
service.port = tcp_server.socket.getsockname()[1]
2007
service.port = tcp_server.socket.getsockname()[1]
3450
2008
if use_ipv6:
3451
2009
logger.info("Now listening on address %r, port %d,"
3452
" flowinfo %d, scope_id %d",
3453
*tcp_server.socket.getsockname())
2010
" flowinfo %d, scope_id %d"
2011
% tcp_server.socket.getsockname())
3454
2012
else: # IPv4
3455
logger.info("Now listening on address %r, port %d",
3456
*tcp_server.socket.getsockname())
3457
3458
# service.interface = tcp_server.socket.getsockname()[3]
3459
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
3460
2018
try:
3461
if zeroconf:
3462
# From the Avahi example code
3463
try:
3464
service.activate()
3465
except dbus.exceptions.DBusException as error:
3466
logger.critical("D-Bus Exception", exc_info=error)
3467
cleanup()
3468
sys.exit(1)
3469
# End of Avahi example code
3470
3471
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3472
lambda *args, **kwargs:
3473
(tcp_server.handle_request
3474
(*args[2:], **kwargs) or True))
3475
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
3476
2033
logger.debug("Starting main loop")
3477
2034
main_loop.run()
3478
except AvahiError as error:
3479
logger.critical("Avahi Error", exc_info=error)
2035
except AvahiError, error:
2036
logger.critical("AvahiError: %s", error)
3480
2037
cleanup()
3481
2038
sys.exit(1)
3482
2039
except KeyboardInterrupt:
3487
2044
# Must run before the D-Bus bus name gets deregistered
3488
2045
cleanup()
3489
2046
3490
3491
2047
if __name__ == '__main__':
3492
2048
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0