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- Committer: Teddy Hogeborn
- Date: 2016-12-12 18:25:02 UTC
- Revision ID: teddy@recompile.se-20161212182502-72seb9hxiu65cgwa
Add spaces around all '=' signs in all C code.
* plugin-runner.c: Add white space around all '=' signs.
* plugins.d/mandos-client.c: - '' -
* plugins.d/plymouth.c: - '' -
* plugin-runner.c: Add white space around all '=' signs.
* plugins.d/mandos-client.c: - '' -
* plugins.d/plymouth.c: - '' -
- files added:
- bugs.xml
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
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2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
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# Mandos server - give out binary blobs to connecting clients.
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#
5
#
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# This program is partly derived from an example program for an Avahi
7
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# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
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#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
#
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# Copyright © 2008-2016 Teddy Hogeborn
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# Copyright © 2008-2016 Björn Påhlsson
16
#
17
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# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
19
19
# the Free Software Foundation, either version 3 of the License, or
23
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
25
# GNU General Public License for more details.
26
#
26
#
27
27
# You should have received a copy of the GNU General Public License
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
30
#
31
# Contact the authors at <mandos@recompile.se>.
32
#
33
33
34
34
from __future__ import (division, absolute_import, print_function,
35
35
unicode_literals)
36
36
37
import SocketServer as socketserver
37
try:
38
from future_builtins import *
39
except ImportError:
40
pass
41
42
try:
43
import SocketServer as socketserver
44
except ImportError:
45
import socketserver
38
46
import socket
39
47
import argparse
40
48
import datetime
41
49
import errno
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
50
try:
51
import ConfigParser as configparser
52
except ImportError:
53
import configparser
49
54
import sys
50
55
import re
51
56
import os
60
65
import struct
61
66
import fcntl
62
67
import functools
63
import cPickle as pickle
68
try:
69
import cPickle as pickle
70
except ImportError:
71
import pickle
64
72
import multiprocessing
73
import types
74
import binascii
75
import tempfile
76
import itertools
77
import collections
78
import codecs
65
79
66
80
import dbus
67
81
import dbus.service
68
import gobject
69
import avahi
82
from gi.repository import GLib
70
83
from dbus.mainloop.glib import DBusGMainLoop
71
84
import ctypes
72
85
import ctypes.util
73
86
import xml.dom.minidom
74
87
import inspect
75
88
89
# Try to find the value of SO_BINDTODEVICE:
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90
try:
91
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
92
# newer, and it is also the most natural place for it:
77
93
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
78
94
except AttributeError:
79
95
try:
96
# This is where SO_BINDTODEVICE was up to and including Python
97
# 2.6, and also 3.2:
80
98
from IN import SO_BINDTODEVICE
81
99
except ImportError:
82
SO_BINDTODEVICE = None
83
84
85
version = "1.3.0"
86
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#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)
100
# In Python 2.7 it seems to have been removed entirely.
101
# Try running the C preprocessor:
102
try:
103
cc = subprocess.Popen(["cc", "--language=c", "-E",
104
"/dev/stdin"],
105
stdin=subprocess.PIPE,
106
stdout=subprocess.PIPE)
107
stdout = cc.communicate(
108
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
109
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
110
except (OSError, ValueError, IndexError):
111
# No value found
112
SO_BINDTODEVICE = None
113
114
if sys.version_info.major == 2:
115
str = unicode
116
117
version = "1.7.13"
118
stored_state_file = "clients.pickle"
119
120
logger = logging.getLogger()
121
syslogger = None
122
123
try:
124
if_nametoindex = ctypes.cdll.LoadLibrary(
125
ctypes.util.find_library("c")).if_nametoindex
126
except (OSError, AttributeError):
127
128
def if_nametoindex(interface):
129
"Get an interface index the hard way, i.e. using fcntl()"
130
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
131
with contextlib.closing(socket.socket()) as s:
132
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
133
struct.pack(b"16s16x", interface))
134
interface_index = struct.unpack("I", ifreq[16:20])[0]
135
return interface_index
136
137
138
def copy_function(func):
139
"""Make a copy of a function"""
140
if sys.version_info.major == 2:
141
return types.FunctionType(func.func_code,
142
func.func_globals,
143
func.func_name,
144
func.func_defaults,
145
func.func_closure)
146
else:
147
return types.FunctionType(func.__code__,
148
func.__globals__,
149
func.__name__,
150
func.__defaults__,
151
func.__closure__)
152
153
154
def initlogger(debug, level=logging.WARNING):
155
"""init logger and add loglevel"""
156
157
global syslogger
158
syslogger = (logging.handlers.SysLogHandler(
159
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
160
address="/dev/log"))
161
syslogger.setFormatter(logging.Formatter
162
('Mandos [%(process)d]: %(levelname)s:'
163
' %(message)s'))
164
logger.addHandler(syslogger)
165
166
if debug:
167
console = logging.StreamHandler()
168
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
169
' [%(process)d]:'
170
' %(levelname)s:'
171
' %(message)s'))
172
logger.addHandler(console)
173
logger.setLevel(level)
174
175
176
class PGPError(Exception):
177
"""Exception if encryption/decryption fails"""
178
pass
179
180
181
class PGPEngine(object):
182
"""A simple class for OpenPGP symmetric encryption & decryption"""
183
184
def __init__(self):
185
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
186
self.gpg = "gpg"
187
try:
188
output = subprocess.check_output(["gpgconf"])
189
for line in output.splitlines():
190
name, text, path = line.split(b":")
191
if name == "gpg":
192
self.gpg = path
193
break
194
except OSError as e:
195
if e.errno != errno.ENOENT:
196
raise
197
self.gnupgargs = ['--batch',
198
'--homedir', self.tempdir,
199
'--force-mdc',
200
'--quiet']
201
# Only GPG version 1 has the --no-use-agent option.
202
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
203
self.gnupgargs.append("--no-use-agent")
204
205
def __enter__(self):
206
return self
207
208
def __exit__(self, exc_type, exc_value, traceback):
209
self._cleanup()
210
return False
211
212
def __del__(self):
213
self._cleanup()
214
215
def _cleanup(self):
216
if self.tempdir is not None:
217
# Delete contents of tempdir
218
for root, dirs, files in os.walk(self.tempdir,
219
topdown=False):
220
for filename in files:
221
os.remove(os.path.join(root, filename))
222
for dirname in dirs:
223
os.rmdir(os.path.join(root, dirname))
224
# Remove tempdir
225
os.rmdir(self.tempdir)
226
self.tempdir = None
227
228
def password_encode(self, password):
229
# Passphrase can not be empty and can not contain newlines or
230
# NUL bytes. So we prefix it and hex encode it.
231
encoded = b"mandos" + binascii.hexlify(password)
232
if len(encoded) > 2048:
233
# GnuPG can't handle long passwords, so encode differently
234
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
235
.replace(b"\n", b"\\n")
236
.replace(b"\0", b"\\x00"))
237
return encoded
238
239
def encrypt(self, data, password):
240
passphrase = self.password_encode(password)
241
with tempfile.NamedTemporaryFile(
242
dir=self.tempdir) as passfile:
243
passfile.write(passphrase)
244
passfile.flush()
245
proc = subprocess.Popen([self.gpg, '--symmetric',
246
'--passphrase-file',
247
passfile.name]
248
+ self.gnupgargs,
249
stdin=subprocess.PIPE,
250
stdout=subprocess.PIPE,
251
stderr=subprocess.PIPE)
252
ciphertext, err = proc.communicate(input=data)
253
if proc.returncode != 0:
254
raise PGPError(err)
255
return ciphertext
256
257
def decrypt(self, data, password):
258
passphrase = self.password_encode(password)
259
with tempfile.NamedTemporaryFile(
260
dir=self.tempdir) as passfile:
261
passfile.write(passphrase)
262
passfile.flush()
263
proc = subprocess.Popen([self.gpg, '--decrypt',
264
'--passphrase-file',
265
passfile.name]
266
+ self.gnupgargs,
267
stdin=subprocess.PIPE,
268
stdout=subprocess.PIPE,
269
stderr=subprocess.PIPE)
270
decrypted_plaintext, err = proc.communicate(input=data)
271
if proc.returncode != 0:
272
raise PGPError(err)
273
return decrypted_plaintext
274
275
276
# Pretend that we have an Avahi module
277
class Avahi(object):
278
"""This isn't so much a class as it is a module-like namespace.
279
It is instantiated once, and simulates having an Avahi module."""
280
IF_UNSPEC = -1 # avahi-common/address.h
281
PROTO_UNSPEC = -1 # avahi-common/address.h
282
PROTO_INET = 0 # avahi-common/address.h
283
PROTO_INET6 = 1 # avahi-common/address.h
284
DBUS_NAME = "org.freedesktop.Avahi"
285
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
286
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
287
DBUS_PATH_SERVER = "/"
288
289
def string_array_to_txt_array(self, t):
290
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
291
for s in t), signature="ay")
292
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
293
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
294
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
295
SERVER_INVALID = 0 # avahi-common/defs.h
296
SERVER_REGISTERING = 1 # avahi-common/defs.h
297
SERVER_RUNNING = 2 # avahi-common/defs.h
298
SERVER_COLLISION = 3 # avahi-common/defs.h
299
SERVER_FAILURE = 4 # avahi-common/defs.h
300
avahi = Avahi()
301
102
302
103
303
class AvahiError(Exception):
104
304
def __init__(self, value, *args, **kwargs):
105
305
self.value = value
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
306
return super(AvahiError, self).__init__(value, *args,
307
**kwargs)
308
109
309
110
310
class AvahiServiceError(AvahiError):
111
311
pass
112
312
313
113
314
class AvahiGroupError(AvahiError):
114
315
pass
115
316
116
317
117
318
class AvahiService(object):
118
319
"""An Avahi (Zeroconf) service.
119
320
120
321
Attributes:
121
322
interface: integer; avahi.IF_UNSPEC or an interface index.
122
323
Used to optionally bind to the specified interface.
123
324
name: string; Example: 'Mandos'
124
325
type: string; Example: '_mandos._tcp'.
125
See <http://www.dns-sd.org/ServiceTypes.html>
326
See <https://www.iana.org/assignments/service-names-port-numbers>
126
327
port: integer; what port to announce
127
328
TXT: list of strings; TXT record for the service
128
329
domain: string; Domain to publish on, default to .local if empty.
134
335
server: D-Bus Server
135
336
bus: dbus.SystemBus()
136
337
"""
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):
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):
141
350
self.interface = interface
142
351
self.name = name
143
352
self.type = servicetype
152
361
self.server = None
153
362
self.bus = bus
154
363
self.entry_group_state_changed_match = None
155
def rename(self):
364
365
def rename(self, remove=True):
156
366
"""Derived from the Avahi example code"""
157
367
if self.rename_count >= self.max_renames:
158
368
logger.critical("No suitable Zeroconf service name found"
159
369
" after %i retries, exiting.",
160
370
self.rename_count)
161
371
raise AvahiServiceError("Too many renames")
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
372
self.name = str(
373
self.server.GetAlternativeServiceName(self.name))
374
self.rename_count += 1
163
375
logger.info("Changing Zeroconf service name to %r ...",
164
376
self.name)
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
167
' %%(levelname)s: %%(message)s'
168
% self.name))
169
self.remove()
377
if remove:
378
self.remove()
170
379
try:
171
380
self.add()
172
381
except dbus.exceptions.DBusException as error:
173
logger.critical("DBusException: %s", error)
174
self.cleanup()
175
os._exit(1)
176
self.rename_count += 1
382
if (error.get_dbus_name()
383
== "org.freedesktop.Avahi.CollisionError"):
384
logger.info("Local Zeroconf service name collision.")
385
return self.rename(remove=False)
386
else:
387
logger.critical("D-Bus Exception", exc_info=error)
388
self.cleanup()
389
os._exit(1)
390
177
391
def remove(self):
178
392
"""Derived from the Avahi example code"""
179
if self.group is not None:
180
try:
181
self.group.Free()
182
except (dbus.exceptions.UnknownMethodException,
183
dbus.exceptions.DBusException) as e:
184
pass
185
self.group = None
186
393
if self.entry_group_state_changed_match is not None:
187
394
self.entry_group_state_changed_match.remove()
188
395
self.entry_group_state_changed_match = None
396
if self.group is not None:
397
self.group.Reset()
398
189
399
def add(self):
190
400
"""Derived from the Avahi example code"""
191
401
self.remove()
192
self.group = dbus.Interface(
193
self.bus.get_object(avahi.DBUS_NAME,
194
self.server.EntryGroupNew(),
195
follow_name_owner_changes=True),
196
avahi.DBUS_INTERFACE_ENTRY_GROUP)
402
if self.group is None:
403
self.group = dbus.Interface(
404
self.bus.get_object(avahi.DBUS_NAME,
405
self.server.EntryGroupNew()),
406
avahi.DBUS_INTERFACE_ENTRY_GROUP)
197
407
self.entry_group_state_changed_match = (
198
408
self.group.connect_to_signal(
199
'StateChanged', self .entry_group_state_changed))
409
'StateChanged', self.entry_group_state_changed))
200
410
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
201
411
self.name, self.type)
202
412
self.group.AddService(
208
418
dbus.UInt16(self.port),
209
419
avahi.string_array_to_txt_array(self.TXT))
210
420
self.group.Commit()
421
211
422
def entry_group_state_changed(self, state, error):
212
423
"""Derived from the Avahi example code"""
213
424
logger.debug("Avahi entry group state change: %i", state)
214
425
215
426
if state == avahi.ENTRY_GROUP_ESTABLISHED:
216
427
logger.debug("Zeroconf service established.")
217
428
elif state == avahi.ENTRY_GROUP_COLLISION:
219
430
self.rename()
220
431
elif state == avahi.ENTRY_GROUP_FAILURE:
221
432
logger.critical("Avahi: Error in group state changed %s",
222
unicode(error))
223
raise AvahiGroupError("State changed: %s"
224
% unicode(error))
433
str(error))
434
raise AvahiGroupError("State changed: {!s}".format(error))
435
225
436
def cleanup(self):
226
437
"""Derived from the Avahi example code"""
438
if self.group is not None:
439
try:
440
self.group.Free()
441
except (dbus.exceptions.UnknownMethodException,
442
dbus.exceptions.DBusException):
443
pass
444
self.group = None
227
445
self.remove()
446
228
447
def server_state_changed(self, state, error=None):
229
448
"""Derived from the Avahi example code"""
230
449
logger.debug("Avahi server state change: %i", state)
231
bad_states = { avahi.SERVER_INVALID:
232
"Zeroconf server invalid",
233
avahi.SERVER_REGISTERING: None,
234
avahi.SERVER_COLLISION:
235
"Zeroconf server name collision",
236
avahi.SERVER_FAILURE:
237
"Zeroconf server failure" }
450
bad_states = {
451
avahi.SERVER_INVALID: "Zeroconf server invalid",
452
avahi.SERVER_REGISTERING: None,
453
avahi.SERVER_COLLISION: "Zeroconf server name collision",
454
avahi.SERVER_FAILURE: "Zeroconf server failure",
455
}
238
456
if state in bad_states:
239
if bad_states[state]:
240
logger.error(bad_states[state])
241
self.remove()
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()
242
463
elif state == avahi.SERVER_RUNNING:
243
self.add()
464
try:
465
self.add()
466
except dbus.exceptions.DBusException as error:
467
if (error.get_dbus_name()
468
== "org.freedesktop.Avahi.CollisionError"):
469
logger.info("Local Zeroconf service name"
470
" collision.")
471
return self.rename(remove=False)
472
else:
473
logger.critical("D-Bus Exception", exc_info=error)
474
self.cleanup()
475
os._exit(1)
244
476
else:
245
logger.debug("Unknown state: %r", state)
477
if error is None:
478
logger.debug("Unknown state: %r", state)
479
else:
480
logger.debug("Unknown state: %r: %r", state, error)
481
246
482
def activate(self):
247
483
"""Derived from the Avahi example code"""
248
484
if self.server is None:
252
488
follow_name_owner_changes=True),
253
489
avahi.DBUS_INTERFACE_SERVER)
254
490
self.server.connect_to_signal("StateChanged",
255
self.server_state_changed)
491
self.server_state_changed)
256
492
self.server_state_changed(self.server.GetState())
257
493
258
494
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
259
779
class Client(object):
260
780
"""A representation of a client host served by this server.
261
781
262
782
Attributes:
263
_approved: bool(); 'None' if not yet approved/disapproved
783
approved: bool(); 'None' if not yet approved/disapproved
264
784
approval_delay: datetime.timedelta(); Time to wait for approval
265
785
approval_duration: datetime.timedelta(); Duration of one approval
266
786
checker: subprocess.Popen(); a running checker process used
267
787
to see if the client lives.
268
788
'None' if no process is running.
269
checker_callback_tag: a gobject event source tag, or None
789
checker_callback_tag: a GLib event source tag, or None
270
790
checker_command: string; External command which is run to check
271
791
if client lives. %() expansions are done at
272
792
runtime with vars(self) as dict, so that for
273
793
instance %(name)s can be used in the command.
274
checker_initiator_tag: a gobject event source tag, or None
794
checker_initiator_tag: a GLib event source tag, or None
275
795
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
276
798
current_checker_command: string; current running checker_command
277
disable_hook: If set, called by disable() as disable_hook(self)
278
disable_initiator_tag: a gobject event source tag, or None
799
disable_initiator_tag: a GLib event source tag, or None
279
800
enabled: bool()
280
801
fingerprint: string (40 or 32 hexadecimal digits); used to
281
802
uniquely identify the client
283
804
interval: datetime.timedelta(); How often to start a new checker
284
805
last_approval_request: datetime.datetime(); (UTC) or None
285
806
last_checked_ok: datetime.datetime(); (UTC) or None
286
last_enabled: datetime.datetime(); (UTC)
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
287
813
name: string; from the config file, used in log messages and
288
814
D-Bus identifiers
289
815
secret: bytestring; sent verbatim (over TLS) to client
290
816
timeout: datetime.timedelta(); How long from last_checked_ok
291
817
until this client is disabled
818
extended_timeout: extra long timeout when secret has been sent
292
819
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()
293
823
"""
294
824
295
825
runtime_expansions = ("approval_delay", "approval_duration",
296
"created", "enabled", "fingerprint",
297
"host", "interval", "last_checked_ok",
826
"created", "enabled", "expires",
827
"fingerprint", "host", "interval",
828
"last_approval_request", "last_checked_ok",
298
829
"last_enabled", "name", "timeout")
299
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
300
842
@staticmethod
301
def _timedelta_to_milliseconds(td):
302
"Convert a datetime.timedelta() to milliseconds"
303
return ((td.days * 24 * 60 * 60 * 1000)
304
+ (td.seconds * 1000)
305
+ (td.microseconds // 1000))
306
307
def timeout_milliseconds(self):
308
"Return the 'timeout' attribute in milliseconds"
309
return self._timedelta_to_milliseconds(self.timeout)
310
311
def interval_milliseconds(self):
312
"Return the 'interval' attribute in milliseconds"
313
return self._timedelta_to_milliseconds(self.interval)
314
315
def approval_delay_milliseconds(self):
316
return self._timedelta_to_milliseconds(self.approval_delay)
317
318
def __init__(self, name = None, disable_hook=None, config=None):
319
"""Note: the 'checker' key in 'config' sets the
320
'checker_command' attribute and *not* the 'checker'
321
attribute."""
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):
322
895
self.name = name
323
if config is None:
324
config = {}
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
325
913
logger.debug("Creating client %r", self.name)
326
# Uppercase and remove spaces from fingerprint for later
327
# comparison purposes with return value from the fingerprint()
328
# function
329
self.fingerprint = (config["fingerprint"].upper()
330
.replace(" ", ""))
331
914
logger.debug(" Fingerprint: %s", self.fingerprint)
332
if "secret" in config:
333
self.secret = config["secret"].decode("base64")
334
elif "secfile" in config:
335
with open(os.path.expanduser(os.path.expandvars
336
(config["secfile"])),
337
"rb") as secfile:
338
self.secret = secfile.read()
339
else:
340
raise TypeError("No secret or secfile for client %s"
341
% self.name)
342
self.host = config.get("host", "")
343
self.created = datetime.datetime.utcnow()
344
self.enabled = False
345
self.last_approval_request = None
346
self.last_enabled = None
347
self.last_checked_ok = None
348
self.timeout = string_to_delta(config["timeout"])
349
self.interval = string_to_delta(config["interval"])
350
self.disable_hook = disable_hook
915
self.created = settings.get("created",
916
datetime.datetime.utcnow())
917
918
# attributes specific for this server instance
351
919
self.checker = None
352
920
self.checker_initiator_tag = None
353
921
self.disable_initiator_tag = None
354
922
self.checker_callback_tag = None
355
self.checker_command = config["checker"]
356
923
self.current_checker_command = None
357
self.last_connect = None
358
self._approved = None
359
self.approved_by_default = config.get("approved_by_default",
360
True)
924
self.approved = None
361
925
self.approvals_pending = 0
362
self.approval_delay = string_to_delta(
363
config["approval_delay"])
364
self.approval_duration = string_to_delta(
365
config["approval_duration"])
366
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
367
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
368
939
def send_changedstate(self):
369
self.changedstate.acquire()
370
self.changedstate.notify_all()
371
self.changedstate.release()
372
940
with self.changedstate:
941
self.changedstate.notify_all()
942
373
943
def enable(self):
374
944
"""Start this client's checker and timeout hooks"""
375
945
if getattr(self, "enabled", False):
376
946
# Already enabled
377
947
return
378
self.send_changedstate()
948
self.expires = datetime.datetime.utcnow() + self.timeout
949
self.enabled = True
379
950
self.last_enabled = datetime.datetime.utcnow()
380
# Schedule a new checker to be started an 'interval' from now,
381
# and every interval from then on.
382
self.checker_initiator_tag = (gobject.timeout_add
383
(self.interval_milliseconds(),
384
self.start_checker))
385
# Schedule a disable() when 'timeout' has passed
386
self.disable_initiator_tag = (gobject.timeout_add
387
(self.timeout_milliseconds(),
388
self.disable))
389
self.enabled = True
390
# Also start a new checker *right now*.
391
self.start_checker()
392
951
self.init_checker()
952
self.send_changedstate()
953
393
954
def disable(self, quiet=True):
394
955
"""Disable this client."""
395
956
if not getattr(self, "enabled", False):
396
957
return False
397
958
if not quiet:
398
self.send_changedstate()
399
if not quiet:
400
959
logger.info("Disabling client %s", self.name)
401
if getattr(self, "disable_initiator_tag", False):
402
gobject.source_remove(self.disable_initiator_tag)
960
if getattr(self, "disable_initiator_tag", None) is not None:
961
GLib.source_remove(self.disable_initiator_tag)
403
962
self.disable_initiator_tag = None
404
if getattr(self, "checker_initiator_tag", False):
405
gobject.source_remove(self.checker_initiator_tag)
963
self.expires = None
964
if getattr(self, "checker_initiator_tag", None) is not None:
965
GLib.source_remove(self.checker_initiator_tag)
406
966
self.checker_initiator_tag = None
407
967
self.stop_checker()
408
if self.disable_hook:
409
self.disable_hook(self)
410
968
self.enabled = False
411
# Do not run this again if called by a gobject.timeout_add
969
if not quiet:
970
self.send_changedstate()
971
# Do not run this again if called by a GLib.timeout_add
412
972
return False
413
973
414
974
def __del__(self):
415
self.disable_hook = None
416
975
self.disable()
417
418
def checker_callback(self, pid, condition, command):
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):
419
995
"""The checker has completed, so take appropriate actions."""
420
996
self.checker_callback_tag = None
421
997
self.checker = None
422
if os.WIFEXITED(condition):
423
exitstatus = os.WEXITSTATUS(condition)
424
if exitstatus == 0:
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:
425
1006
logger.info("Checker for %(name)s succeeded",
426
1007
vars(self))
427
1008
self.checked_ok()
428
1009
else:
429
logger.info("Checker for %(name)s failed",
430
vars(self))
1010
logger.info("Checker for %(name)s failed", vars(self))
431
1011
else:
1012
self.last_checker_status = -1
1013
self.last_checker_signal = -returncode
432
1014
logger.warning("Checker for %(name)s crashed?",
433
1015
vars(self))
434
1016
return False
1017
435
1018
def checked_ok(self):
436
"""Bump up the timeout for this client.
437
438
This should only be called when the client has been seen,
439
alive and well.
440
"""
1019
"""Assert that the client has been seen, alive and well."""
441
1020
self.last_checked_ok = datetime.datetime.utcnow()
442
gobject.source_remove(self.disable_initiator_tag)
443
self.disable_initiator_tag = (gobject.timeout_add
444
(self.timeout_milliseconds(),
445
self.disable))
446
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
447
1037
def need_approval(self):
448
1038
self.last_approval_request = datetime.datetime.utcnow()
449
1039
450
1040
def start_checker(self):
451
1041
"""Start a new checker subprocess if one is not running.
452
1042
453
1043
If a checker already exists, leave it running and do
454
1044
nothing."""
455
1045
# The reason for not killing a running checker is that if we
456
# did that, then if a checker (for some reason) started
457
# running slowly and taking more than 'interval' time, the
458
# client would inevitably timeout, since no checker would get
459
# a chance to run to completion. If we instead leave running
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
460
1050
# checkers alone, the checker would have to take more time
461
1051
# than 'timeout' for the client to be disabled, which is as it
462
1052
# should be.
463
464
# If a checker exists, make sure it is not a zombie
465
try:
466
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
467
except (AttributeError, OSError) as error:
468
if (isinstance(error, OSError)
469
and error.errno != errno.ECHILD):
470
raise error
471
else:
472
if pid:
473
logger.warning("Checker was a zombie")
474
gobject.source_remove(self.checker_callback_tag)
475
self.checker_callback(pid, status,
476
self.current_checker_command)
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
477
1058
# Start a new checker if needed
478
1059
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}
479
1064
try:
480
# In case checker_command has exactly one % operator
481
command = self.checker_command % self.host
482
except TypeError:
483
# Escape attributes for the shell
484
escaped_attrs = dict(
485
(attr,
486
re.escape(unicode(str(getattr(self, attr, "")),
487
errors=
488
'replace')))
489
for attr in
490
self.runtime_expansions)
491
492
try:
493
command = self.checker_command % escaped_attrs
494
except TypeError as error:
495
logger.error('Could not format string "%s":'
496
' %s', self.checker_command, error)
497
return True # Try again later
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
498
1071
self.current_checker_command = command
499
try:
500
logger.info("Starting checker %r for %s",
501
command, self.name)
502
# We don't need to redirect stdout and stderr, since
503
# in normal mode, that is already done by daemon(),
504
# and in debug mode we don't want to. (Stdin is
505
# always replaced by /dev/null.)
506
self.checker = subprocess.Popen(command,
507
close_fds=True,
508
shell=True, cwd="/")
509
self.checker_callback_tag = (gobject.child_watch_add
510
(self.checker.pid,
511
self.checker_callback,
512
data=command))
513
# The checker may have completed before the gobject
514
# watch was added. Check for this.
515
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
516
if pid:
517
gobject.source_remove(self.checker_callback_tag)
518
self.checker_callback(pid, status, command)
519
except OSError as error:
520
logger.error("Failed to start subprocess: %s",
521
error)
522
# Re-run this periodically if run by gobject.timeout_add
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
523
1098
return True
524
1099
525
1100
def stop_checker(self):
526
1101
"""Force the checker process, if any, to stop."""
527
1102
if self.checker_callback_tag:
528
gobject.source_remove(self.checker_callback_tag)
1103
GLib.source_remove(self.checker_callback_tag)
529
1104
self.checker_callback_tag = None
530
1105
if getattr(self, "checker", None) is None:
531
1106
return
532
1107
logger.debug("Stopping checker for %(name)s", vars(self))
533
try:
534
os.kill(self.checker.pid, signal.SIGTERM)
535
#time.sleep(0.5)
536
#if self.checker.poll() is None:
537
# os.kill(self.checker.pid, signal.SIGKILL)
538
except OSError as error:
539
if error.errno != errno.ESRCH: # No such process
540
raise
1108
self.checker.terminate()
541
1109
self.checker = None
542
1110
543
def dbus_service_property(dbus_interface, signature="v",
544
access="readwrite", byte_arrays=False):
1111
1112
def dbus_service_property(dbus_interface,
1113
signature="v",
1114
access="readwrite",
1115
byte_arrays=False):
545
1116
"""Decorators for marking methods of a DBusObjectWithProperties to
546
1117
become properties on the D-Bus.
547
1118
548
1119
The decorated method will be called with no arguments by "Get"
549
1120
and with one argument by "Set".
550
1121
551
1122
The parameters, where they are supported, are the same as
552
1123
dbus.service.method, except there is only "signature", since the
553
1124
type from Get() and the type sent to Set() is the same.
556
1127
# "Set" method, so we fail early here:
557
1128
if byte_arrays and signature != "ay":
558
1129
raise ValueError("Byte arrays not supported for non-'ay'"
559
" signature %r" % signature)
1130
" signature {!r}".format(signature))
1131
560
1132
def decorator(func):
561
1133
func._dbus_is_property = True
562
1134
func._dbus_interface = dbus_interface
565
1137
func._dbus_name = func.__name__
566
1138
if func._dbus_name.endswith("_dbus_property"):
567
1139
func._dbus_name = func._dbus_name[:-14]
568
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
569
return func
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
570
1186
return decorator
571
1187
572
1188
573
1189
class DBusPropertyException(dbus.exceptions.DBusException):
574
1190
"""A base class for D-Bus property-related exceptions
575
1191
"""
576
def __unicode__(self):
577
return unicode(str(self))
1192
pass
578
1193
579
1194
580
1195
class DBusPropertyAccessException(DBusPropertyException):
589
1204
pass
590
1205
591
1206
592
class DBusObjectWithProperties(dbus.service.Object):
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):
593
1297
"""A D-Bus object with properties.
594
1298
595
1299
Classes inheriting from this can use the dbus_service_property
596
1300
decorator to expose methods as D-Bus properties. It exposes the
597
1301
standard Get(), Set(), and GetAll() methods on the D-Bus.
598
1302
"""
599
600
@staticmethod
601
def _is_dbus_property(obj):
602
return getattr(obj, "_dbus_is_property", False)
603
604
def _get_all_dbus_properties(self):
605
"""Returns a generator of (name, attribute) pairs
606
"""
607
return ((prop._dbus_name, prop)
608
for name, prop in
609
inspect.getmembers(self, self._is_dbus_property))
610
1303
611
1304
def _get_dbus_property(self, interface_name, property_name):
612
1305
"""Returns a bound method if one exists which is a D-Bus
613
1306
property with the specified name and interface.
614
1307
"""
615
for name in (property_name,
616
property_name + "_dbus_property"):
617
prop = getattr(self, name, None)
618
if (prop is None
619
or not self._is_dbus_property(prop)
620
or prop._dbus_name != property_name
621
or (interface_name and prop._dbus_interface
622
and interface_name != prop._dbus_interface)):
623
continue
624
return prop
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
625
1315
# No such property
626
raise DBusPropertyNotFound(self.dbus_object_path + ":"
627
+ interface_name + "."
628
+ property_name)
629
630
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
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",
631
1330
out_signature="v")
632
1331
def Get(self, interface_name, property_name):
633
1332
"""Standard D-Bus property Get() method, see D-Bus standard.
639
1338
if not hasattr(value, "variant_level"):
640
1339
return value
641
1340
return type(value)(value, variant_level=value.variant_level+1)
642
1341
643
1342
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
644
1343
def Set(self, interface_name, property_name, value):
645
1344
"""Standard D-Bus property Set() method, see D-Bus standard.
651
1350
# The byte_arrays option is not supported yet on
652
1351
# signatures other than "ay".
653
1352
if prop._dbus_signature != "ay":
654
raise ValueError
655
value = dbus.ByteArray(''.join(unichr(byte)
656
for byte in value))
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))
657
1358
prop(value)
658
659
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1359
1360
@dbus.service.method(dbus.PROPERTIES_IFACE,
1361
in_signature="s",
660
1362
out_signature="a{sv}")
661
1363
def GetAll(self, interface_name):
662
1364
"""Standard D-Bus property GetAll() method, see D-Bus
664
1366
665
1367
Note: Will not include properties with access="write".
666
1368
"""
667
all = {}
668
for name, prop in self._get_all_dbus_properties():
1369
properties = {}
1370
for name, prop in self._get_all_dbus_things("property"):
669
1371
if (interface_name
670
1372
and interface_name != prop._dbus_interface):
671
1373
# Interface non-empty but did not match
675
1377
continue
676
1378
value = prop()
677
1379
if not hasattr(value, "variant_level"):
678
all[name] = value
1380
properties[name] = value
679
1381
continue
680
all[name] = type(value)(value, variant_level=
681
value.variant_level+1)
682
return dbus.Dictionary(all, signature="sv")
683
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
684
1394
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
685
1395
out_signature="s",
686
1396
path_keyword='object_path',
687
1397
connection_keyword='connection')
688
1398
def Introspect(self, object_path, connection):
689
"""Standard D-Bus method, overloaded to insert property tags.
1399
"""Overloading of standard D-Bus method.
1400
1401
Inserts property tags and interface annotation tags.
690
1402
"""
691
xmlstring = dbus.service.Object.Introspect(self, object_path,
692
connection)
1403
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1404
object_path,
1405
connection)
693
1406
try:
694
1407
document = xml.dom.minidom.parseString(xmlstring)
1408
695
1409
def make_tag(document, name, prop):
696
1410
e = document.createElement("property")
697
1411
e.setAttribute("name", name)
698
1412
e.setAttribute("type", prop._dbus_signature)
699
1413
e.setAttribute("access", prop._dbus_access)
700
1414
return e
1415
701
1416
for if_tag in document.getElementsByTagName("interface"):
1417
# Add property tags
702
1418
for tag in (make_tag(document, name, prop)
703
1419
for name, prop
704
in self._get_all_dbus_properties()
1420
in self._get_all_dbus_things("property")
705
1421
if prop._dbus_interface
706
1422
== if_tag.getAttribute("name")):
707
1423
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)
708
1440
# Add the names to the return values for the
709
1441
# "org.freedesktop.DBus.Properties" methods
710
1442
if (if_tag.getAttribute("name")
725
1457
except (AttributeError, xml.dom.DOMException,
726
1458
xml.parsers.expat.ExpatError) as error:
727
1459
logger.error("Failed to override Introspection method",
728
error)
729
return xmlstring
730
731
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"})
732
1713
class ClientDBus(Client, DBusObjectWithProperties):
733
1714
"""A Client class using D-Bus
734
1715
735
1716
Attributes:
736
1717
dbus_object_path: dbus.ObjectPath
737
1718
bus: dbus.SystemBus()
738
1719
"""
739
1720
740
1721
runtime_expansions = (Client.runtime_expansions
741
+ ("dbus_object_path",))
742
1722
+ ("dbus_object_path", ))
1723
1724
_interface = "se.recompile.Mandos.Client"
1725
743
1726
# dbus.service.Object doesn't use super(), so we can't either.
744
745
def __init__(self, bus = None, *args, **kwargs):
746
self._approvals_pending = 0
1727
1728
def __init__(self, bus=None, *args, **kwargs):
747
1729
self.bus = bus
748
1730
Client.__init__(self, *args, **kwargs)
749
1731
# Only now, when this client is initialized, can it show up on
750
1732
# the D-Bus
751
client_object_name = unicode(self.name).translate(
1733
client_object_name = str(self.name).translate(
752
1734
{ord("."): ord("_"),
753
1735
ord("-"): ord("_")})
754
self.dbus_object_path = (dbus.ObjectPath
755
("/clients/" + client_object_name))
1736
self.dbus_object_path = dbus.ObjectPath(
1737
"/clients/" + client_object_name)
756
1738
DBusObjectWithProperties.__init__(self, self.bus,
757
1739
self.dbus_object_path)
758
759
def _get_approvals_pending(self):
760
return self._approvals_pending
761
def _set_approvals_pending(self, value):
762
old_value = self._approvals_pending
763
self._approvals_pending = value
764
bval = bool(value)
765
if (hasattr(self, "dbus_object_path")
766
and bval is not bool(old_value)):
767
dbus_bool = dbus.Boolean(bval, variant_level=1)
768
self.PropertyChanged(dbus.String("ApprovalPending"),
769
dbus_bool)
770
771
approvals_pending = property(_get_approvals_pending,
772
_set_approvals_pending)
773
del _get_approvals_pending, _set_approvals_pending
774
775
@staticmethod
776
def _datetime_to_dbus(dt, variant_level=0):
777
"""Convert a UTC datetime.datetime() to a D-Bus type."""
778
return dbus.String(dt.isoformat(),
779
variant_level=variant_level)
780
781
def enable(self):
782
oldstate = getattr(self, "enabled", False)
783
r = Client.enable(self)
784
if oldstate != self.enabled:
785
# Emit D-Bus signals
786
self.PropertyChanged(dbus.String("Enabled"),
787
dbus.Boolean(True, variant_level=1))
788
self.PropertyChanged(
789
dbus.String("LastEnabled"),
790
self._datetime_to_dbus(self.last_enabled,
791
variant_level=1))
792
return r
793
794
def disable(self, quiet = False):
795
oldstate = getattr(self, "enabled", False)
796
r = Client.disable(self, quiet=quiet)
797
if not quiet and oldstate != self.enabled:
798
# Emit D-Bus signal
799
self.PropertyChanged(dbus.String("Enabled"),
800
dbus.Boolean(False, variant_level=1))
801
return r
802
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
803
1822
def __del__(self, *args, **kwargs):
804
1823
try:
805
1824
self.remove_from_connection()
808
1827
if hasattr(DBusObjectWithProperties, "__del__"):
809
1828
DBusObjectWithProperties.__del__(self, *args, **kwargs)
810
1829
Client.__del__(self, *args, **kwargs)
811
812
def checker_callback(self, pid, condition, command,
813
*args, **kwargs):
814
self.checker_callback_tag = None
815
self.checker = None
816
# Emit D-Bus signal
817
self.PropertyChanged(dbus.String("CheckerRunning"),
818
dbus.Boolean(False, variant_level=1))
819
if os.WIFEXITED(condition):
820
exitstatus = os.WEXITSTATUS(condition)
1830
1831
def checker_callback(self, source, condition,
1832
connection, command, *args, **kwargs):
1833
ret = Client.checker_callback(self, source, condition,
1834
connection, command, *args,
1835
**kwargs)
1836
exitstatus = self.last_checker_status
1837
if exitstatus >= 0:
821
1838
# Emit D-Bus signal
822
1839
self.CheckerCompleted(dbus.Int16(exitstatus),
823
dbus.Int64(condition),
1840
# This is specific to GNU libC
1841
dbus.Int64(exitstatus << 8),
824
1842
dbus.String(command))
825
1843
else:
826
1844
# Emit D-Bus signal
827
1845
self.CheckerCompleted(dbus.Int16(-1),
828
dbus.Int64(condition),
1846
dbus.Int64(
1847
# This is specific to GNU libC
1848
(exitstatus << 8)
1849
| self.last_checker_signal),
829
1850
dbus.String(command))
830
831
return Client.checker_callback(self, pid, condition, command,
832
*args, **kwargs)
833
834
def checked_ok(self, *args, **kwargs):
835
Client.checked_ok(self, *args, **kwargs)
836
# Emit D-Bus signal
837
self.PropertyChanged(
838
dbus.String("LastCheckedOK"),
839
(self._datetime_to_dbus(self.last_checked_ok,
840
variant_level=1)))
841
842
def need_approval(self, *args, **kwargs):
843
r = Client.need_approval(self, *args, **kwargs)
844
# Emit D-Bus signal
845
self.PropertyChanged(
846
dbus.String("LastApprovalRequest"),
847
(self._datetime_to_dbus(self.last_approval_request,
848
variant_level=1)))
849
return r
850
1851
return ret
1852
851
1853
def start_checker(self, *args, **kwargs):
852
old_checker = self.checker
853
if self.checker is not None:
854
old_checker_pid = self.checker.pid
855
else:
856
old_checker_pid = None
1854
old_checker_pid = getattr(self.checker, "pid", None)
857
1855
r = Client.start_checker(self, *args, **kwargs)
858
1856
# Only if new checker process was started
859
1857
if (self.checker is not None
860
1858
and old_checker_pid != self.checker.pid):
861
1859
# Emit D-Bus signal
862
1860
self.CheckerStarted(self.current_checker_command)
863
self.PropertyChanged(
864
dbus.String("CheckerRunning"),
865
dbus.Boolean(True, variant_level=1))
866
return r
867
868
def stop_checker(self, *args, **kwargs):
869
old_checker = getattr(self, "checker", None)
870
r = Client.stop_checker(self, *args, **kwargs)
871
if (old_checker is not None
872
and getattr(self, "checker", None) is None):
873
self.PropertyChanged(dbus.String("CheckerRunning"),
874
dbus.Boolean(False, variant_level=1))
875
1861
return r
876
1862
877
1863
def _reset_approved(self):
878
self._approved = None
1864
self.approved = None
879
1865
return False
880
1866
881
1867
def approve(self, value=True):
1868
self.approved = value
1869
GLib.timeout_add(int(self.approval_duration.total_seconds()
1870
* 1000), self._reset_approved)
882
1871
self.send_changedstate()
883
self._approved = value
884
gobject.timeout_add(self._timedelta_to_milliseconds
885
(self.approval_duration),
886
self._reset_approved)
887
888
889
## D-Bus methods, signals & properties
890
_interface = "se.bsnet.fukt.Mandos.Client"
891
892
## Signals
893
1872
1873
# D-Bus methods, signals & properties
1874
1875
# Interfaces
1876
1877
# Signals
1878
894
1879
# CheckerCompleted - signal
895
1880
@dbus.service.signal(_interface, signature="nxs")
896
1881
def CheckerCompleted(self, exitcode, waitstatus, command):
897
1882
"D-Bus signal"
898
1883
pass
899
1884
900
1885
# CheckerStarted - signal
901
1886
@dbus.service.signal(_interface, signature="s")
902
1887
def CheckerStarted(self, command):
903
1888
"D-Bus signal"
904
1889
pass
905
1890
906
1891
# PropertyChanged - signal
1892
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
907
1893
@dbus.service.signal(_interface, signature="sv")
908
1894
def PropertyChanged(self, property, value):
909
1895
"D-Bus signal"
910
1896
pass
911
1897
912
1898
# GotSecret - signal
913
1899
@dbus.service.signal(_interface)
914
1900
def GotSecret(self):
917
1903
server to mandos-client
918
1904
"""
919
1905
pass
920
1906
921
1907
# Rejected - signal
922
1908
@dbus.service.signal(_interface, signature="s")
923
1909
def Rejected(self, reason):
924
1910
"D-Bus signal"
925
1911
pass
926
1912
927
1913
# NeedApproval - signal
928
1914
@dbus.service.signal(_interface, signature="tb")
929
1915
def NeedApproval(self, timeout, default):
930
1916
"D-Bus signal"
931
1917
return self.need_approval()
932
933
## Methods
934
1918
1919
# Methods
1920
935
1921
# Approve - method
936
1922
@dbus.service.method(_interface, in_signature="b")
937
1923
def Approve(self, value):
938
1924
self.approve(value)
939
1925
940
1926
# CheckedOK - method
941
1927
@dbus.service.method(_interface)
942
1928
def CheckedOK(self):
943
1929
self.checked_ok()
944
1930
945
1931
# Enable - method
1932
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
946
1933
@dbus.service.method(_interface)
947
1934
def Enable(self):
948
1935
"D-Bus method"
949
1936
self.enable()
950
1937
951
1938
# StartChecker - method
1939
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
952
1940
@dbus.service.method(_interface)
953
1941
def StartChecker(self):
954
1942
"D-Bus method"
955
1943
self.start_checker()
956
1944
957
1945
# Disable - method
1946
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
958
1947
@dbus.service.method(_interface)
959
1948
def Disable(self):
960
1949
"D-Bus method"
961
1950
self.disable()
962
1951
963
1952
# StopChecker - method
1953
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
964
1954
@dbus.service.method(_interface)
965
1955
def StopChecker(self):
966
1956
self.stop_checker()
967
968
## Properties
969
1957
1958
# Properties
1959
970
1960
# ApprovalPending - property
971
1961
@dbus_service_property(_interface, signature="b", access="read")
972
1962
def ApprovalPending_dbus_property(self):
973
1963
return dbus.Boolean(bool(self.approvals_pending))
974
1964
975
1965
# ApprovedByDefault - property
976
@dbus_service_property(_interface, signature="b",
1966
@dbus_service_property(_interface,
1967
signature="b",
977
1968
access="readwrite")
978
1969
def ApprovedByDefault_dbus_property(self, value=None):
979
1970
if value is None: # get
980
1971
return dbus.Boolean(self.approved_by_default)
981
1972
self.approved_by_default = bool(value)
982
# Emit D-Bus signal
983
self.PropertyChanged(dbus.String("ApprovedByDefault"),
984
dbus.Boolean(value, variant_level=1))
985
1973
986
1974
# ApprovalDelay - property
987
@dbus_service_property(_interface, signature="t",
1975
@dbus_service_property(_interface,
1976
signature="t",
988
1977
access="readwrite")
989
1978
def ApprovalDelay_dbus_property(self, value=None):
990
1979
if value is None: # get
991
return dbus.UInt64(self.approval_delay_milliseconds())
1980
return dbus.UInt64(self.approval_delay.total_seconds()
1981
* 1000)
992
1982
self.approval_delay = datetime.timedelta(0, 0, 0, value)
993
# Emit D-Bus signal
994
self.PropertyChanged(dbus.String("ApprovalDelay"),
995
dbus.UInt64(value, variant_level=1))
996
1983
997
1984
# ApprovalDuration - property
998
@dbus_service_property(_interface, signature="t",
1985
@dbus_service_property(_interface,
1986
signature="t",
999
1987
access="readwrite")
1000
1988
def ApprovalDuration_dbus_property(self, value=None):
1001
1989
if value is None: # get
1002
return dbus.UInt64(self._timedelta_to_milliseconds(
1003
self.approval_duration))
1990
return dbus.UInt64(self.approval_duration.total_seconds()
1991
* 1000)
1004
1992
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1005
# Emit D-Bus signal
1006
self.PropertyChanged(dbus.String("ApprovalDuration"),
1007
dbus.UInt64(value, variant_level=1))
1008
1993
1009
1994
# Name - property
1995
@dbus_annotations(
1996
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1010
1997
@dbus_service_property(_interface, signature="s", access="read")
1011
1998
def Name_dbus_property(self):
1012
1999
return dbus.String(self.name)
1013
2000
1014
2001
# Fingerprint - property
2002
@dbus_annotations(
2003
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1015
2004
@dbus_service_property(_interface, signature="s", access="read")
1016
2005
def Fingerprint_dbus_property(self):
1017
2006
return dbus.String(self.fingerprint)
1018
2007
1019
2008
# Host - property
1020
@dbus_service_property(_interface, signature="s",
2009
@dbus_service_property(_interface,
2010
signature="s",
1021
2011
access="readwrite")
1022
2012
def Host_dbus_property(self, value=None):
1023
2013
if value is None: # get
1024
2014
return dbus.String(self.host)
1025
self.host = value
1026
# Emit D-Bus signal
1027
self.PropertyChanged(dbus.String("Host"),
1028
dbus.String(value, variant_level=1))
1029
2015
self.host = str(value)
2016
1030
2017
# Created - property
2018
@dbus_annotations(
2019
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1031
2020
@dbus_service_property(_interface, signature="s", access="read")
1032
2021
def Created_dbus_property(self):
1033
return dbus.String(self._datetime_to_dbus(self.created))
1034
2022
return datetime_to_dbus(self.created)
2023
1035
2024
# LastEnabled - property
1036
2025
@dbus_service_property(_interface, signature="s", access="read")
1037
2026
def LastEnabled_dbus_property(self):
1038
if self.last_enabled is None:
1039
return dbus.String("")
1040
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1041
2027
return datetime_to_dbus(self.last_enabled)
2028
1042
2029
# Enabled - property
1043
@dbus_service_property(_interface, signature="b",
2030
@dbus_service_property(_interface,
2031
signature="b",
1044
2032
access="readwrite")
1045
2033
def Enabled_dbus_property(self, value=None):
1046
2034
if value is None: # get
1049
2037
self.enable()
1050
2038
else:
1051
2039
self.disable()
1052
2040
1053
2041
# LastCheckedOK - property
1054
@dbus_service_property(_interface, signature="s",
2042
@dbus_service_property(_interface,
2043
signature="s",
1055
2044
access="readwrite")
1056
2045
def LastCheckedOK_dbus_property(self, value=None):
1057
2046
if value is not None:
1058
2047
self.checked_ok()
1059
2048
return
1060
if self.last_checked_ok is None:
1061
return dbus.String("")
1062
return dbus.String(self._datetime_to_dbus(self
1063
.last_checked_ok))
1064
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
1065
2061
# LastApprovalRequest - property
1066
2062
@dbus_service_property(_interface, signature="s", access="read")
1067
2063
def LastApprovalRequest_dbus_property(self):
1068
if self.last_approval_request is None:
1069
return dbus.String("")
1070
return dbus.String(self.
1071
_datetime_to_dbus(self
1072
.last_approval_request))
1073
2064
return datetime_to_dbus(self.last_approval_request)
2065
1074
2066
# Timeout - property
1075
@dbus_service_property(_interface, signature="t",
2067
@dbus_service_property(_interface,
2068
signature="t",
1076
2069
access="readwrite")
1077
2070
def Timeout_dbus_property(self, value=None):
1078
2071
if value is None: # get
1079
return dbus.UInt64(self.timeout_milliseconds())
2072
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2073
old_timeout = self.timeout
1080
2074
self.timeout = datetime.timedelta(0, 0, 0, value)
1081
# Emit D-Bus signal
1082
self.PropertyChanged(dbus.String("Timeout"),
1083
dbus.UInt64(value, variant_level=1))
1084
if getattr(self, "disable_initiator_tag", None) is None:
1085
return
1086
# Reschedule timeout
1087
gobject.source_remove(self.disable_initiator_tag)
1088
self.disable_initiator_tag = None
1089
time_to_die = (self.
1090
_timedelta_to_milliseconds((self
1091
.last_checked_ok
1092
+ self.timeout)
1093
- datetime.datetime
1094
.utcnow()))
1095
if time_to_die <= 0:
1096
# The timeout has passed
1097
self.disable()
1098
else:
1099
self.disable_initiator_tag = (gobject.timeout_add
1100
(time_to_die, self.disable))
1101
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
1102
2101
# Interval - property
1103
@dbus_service_property(_interface, signature="t",
2102
@dbus_service_property(_interface,
2103
signature="t",
1104
2104
access="readwrite")
1105
2105
def Interval_dbus_property(self, value=None):
1106
2106
if value is None: # get
1107
return dbus.UInt64(self.interval_milliseconds())
2107
return dbus.UInt64(self.interval.total_seconds() * 1000)
1108
2108
self.interval = datetime.timedelta(0, 0, 0, value)
1109
# Emit D-Bus signal
1110
self.PropertyChanged(dbus.String("Interval"),
1111
dbus.UInt64(value, variant_level=1))
1112
2109
if getattr(self, "checker_initiator_tag", None) is None:
1113
2110
return
1114
# Reschedule checker run
1115
gobject.source_remove(self.checker_initiator_tag)
1116
self.checker_initiator_tag = (gobject.timeout_add
1117
(value, self.start_checker))
1118
self.start_checker() # Start one now, too
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
1119
2117
1120
2118
# Checker - property
1121
@dbus_service_property(_interface, signature="s",
2119
@dbus_service_property(_interface,
2120
signature="s",
1122
2121
access="readwrite")
1123
2122
def Checker_dbus_property(self, value=None):
1124
2123
if value is None: # get
1125
2124
return dbus.String(self.checker_command)
1126
self.checker_command = value
1127
# Emit D-Bus signal
1128
self.PropertyChanged(dbus.String("Checker"),
1129
dbus.String(self.checker_command,
1130
variant_level=1))
1131
2125
self.checker_command = str(value)
2126
1132
2127
# CheckerRunning - property
1133
@dbus_service_property(_interface, signature="b",
2128
@dbus_service_property(_interface,
2129
signature="b",
1134
2130
access="readwrite")
1135
2131
def CheckerRunning_dbus_property(self, value=None):
1136
2132
if value is None: # get
1139
2135
self.start_checker()
1140
2136
else:
1141
2137
self.stop_checker()
1142
2138
1143
2139
# ObjectPath - property
2140
@dbus_annotations(
2141
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2142
"org.freedesktop.DBus.Deprecated": "true"})
1144
2143
@dbus_service_property(_interface, signature="o", access="read")
1145
2144
def ObjectPath_dbus_property(self):
1146
return self.dbus_object_path # is already a dbus.ObjectPath
1147
2145
return self.dbus_object_path # is already a dbus.ObjectPath
2146
1148
2147
# Secret = property
1149
@dbus_service_property(_interface, signature="ay",
1150
access="write", byte_arrays=True)
2148
@dbus_annotations(
2149
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2150
"invalidates"})
2151
@dbus_service_property(_interface,
2152
signature="ay",
2153
access="write",
2154
byte_arrays=True)
1151
2155
def Secret_dbus_property(self, value):
1152
self.secret = str(value)
1153
2156
self.secret = bytes(value)
2157
1154
2158
del _interface
1155
2159
1156
2160
1159
2163
self._pipe = child_pipe
1160
2164
self._pipe.send(('init', fpr, address))
1161
2165
if not self._pipe.recv():
1162
raise KeyError()
2166
raise KeyError(fpr)
1163
2167
1164
2168
def __getattribute__(self, name):
1165
if(name == '_pipe'):
2169
if name == '_pipe':
1166
2170
return super(ProxyClient, self).__getattribute__(name)
1167
2171
self._pipe.send(('getattr', name))
1168
2172
data = self._pipe.recv()
1169
2173
if data[0] == 'data':
1170
2174
return data[1]
1171
2175
if data[0] == 'function':
2176
1172
2177
def func(*args, **kwargs):
1173
2178
self._pipe.send(('funcall', name, args, kwargs))
1174
2179
return self._pipe.recv()[1]
2180
1175
2181
return func
1176
2182
1177
2183
def __setattr__(self, name, value):
1178
if(name == '_pipe'):
2184
if name == '_pipe':
1179
2185
return super(ProxyClient, self).__setattr__(name, value)
1180
2186
self._pipe.send(('setattr', name, value))
1181
2187
1182
2188
1183
2189
class ClientHandler(socketserver.BaseRequestHandler, object):
1184
2190
"""A class to handle client connections.
1185
2191
1186
2192
Instantiated once for each connection to handle it.
1187
2193
Note: This will run in its own forked process."""
1188
2194
1189
2195
def handle(self):
1190
2196
with contextlib.closing(self.server.child_pipe) as child_pipe:
1191
2197
logger.info("TCP connection from: %s",
1192
unicode(self.client_address))
2198
str(self.client_address))
1193
2199
logger.debug("Pipe FD: %d",
1194
2200
self.server.child_pipe.fileno())
1195
2201
1196
session = (gnutls.connection
1197
.ClientSession(self.request,
1198
gnutls.connection
1199
.X509Credentials()))
1200
1201
# Note: gnutls.connection.X509Credentials is really a
1202
# generic GnuTLS certificate credentials object so long as
1203
# no X.509 keys are added to it. Therefore, we can use it
1204
# here despite using OpenPGP certificates.
1205
1206
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1207
# "+AES-256-CBC", "+SHA1",
1208
# "+COMP-NULL", "+CTYPE-OPENPGP",
1209
# "+DHE-DSS"))
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"))
1210
2208
# Use a fallback default, since this MUST be set.
1211
2209
priority = self.server.gnutls_priority
1212
2210
if priority is None:
1213
2211
priority = "NORMAL"
1214
(gnutls.library.functions
1215
.gnutls_priority_set_direct(session._c_object,
1216
priority, None))
2212
gnutls.priority_set_direct(session._c_object,
2213
priority.encode("utf-8"),
2214
None)
1217
2215
1218
2216
# Start communication using the Mandos protocol
1219
2217
# Get protocol number
1221
2219
logger.debug("Protocol version: %r", line)
1222
2220
try:
1223
2221
if int(line.strip().split()[0]) > 1:
1224
raise RuntimeError
2222
raise RuntimeError(line)
1225
2223
except (ValueError, IndexError, RuntimeError) as error:
1226
2224
logger.error("Unknown protocol version: %s", error)
1227
2225
return
1229
2227
# Start GnuTLS connection
1230
2228
try:
1231
2229
session.handshake()
1232
except gnutls.errors.GNUTLSError as error:
2230
except gnutls.Error as error:
1233
2231
logger.warning("Handshake failed: %s", error)
1234
2232
# Do not run session.bye() here: the session is not
1235
2233
# established. Just abandon the request.
1239
2237
approval_required = False
1240
2238
try:
1241
2239
try:
1242
fpr = self.fingerprint(self.peer_certificate
1243
(session))
1244
except (TypeError,
1245
gnutls.errors.GNUTLSError) as error:
2240
fpr = self.fingerprint(
2241
self.peer_certificate(session))
2242
except (TypeError, gnutls.Error) as error:
1246
2243
logger.warning("Bad certificate: %s", error)
1247
2244
return
1248
2245
logger.debug("Fingerprint: %s", fpr)
1252
2249
self.client_address)
1253
2250
except KeyError:
1254
2251
return
1255
2252
1256
2253
if client.approval_delay:
1257
2254
delay = client.approval_delay
1258
2255
client.approvals_pending += 1
1259
2256
approval_required = True
1260
2257
1261
2258
while True:
1262
2259
if not client.enabled:
1263
logger.warning("Client %s is disabled",
1264
client.name)
2260
logger.info("Client %s is disabled",
2261
client.name)
1265
2262
if self.server.use_dbus:
1266
2263
# Emit D-Bus signal
1267
client.Rejected("Disabled")
2264
client.Rejected("Disabled")
1268
2265
return
1269
1270
if client._approved or not client.approval_delay:
1271
#We are approved or approval is disabled
2266
2267
if client.approved or not client.approval_delay:
2268
# We are approved or approval is disabled
1272
2269
break
1273
elif client._approved is None:
2270
elif client.approved is None:
1274
2271
logger.info("Client %s needs approval",
1275
2272
client.name)
1276
2273
if self.server.use_dbus:
1277
2274
# Emit D-Bus signal
1278
2275
client.NeedApproval(
1279
client.approval_delay_milliseconds(),
1280
client.approved_by_default)
2276
client.approval_delay.total_seconds()
2277
* 1000, client.approved_by_default)
1281
2278
else:
1282
2279
logger.warning("Client %s was not approved",
1283
2280
client.name)
1285
2282
# Emit D-Bus signal
1286
2283
client.Rejected("Denied")
1287
2284
return
1288
1289
#wait until timeout or approved
1290
#x = float(client._timedelta_to_milliseconds(delay))
2285
2286
# wait until timeout or approved
1291
2287
time = datetime.datetime.now()
1292
2288
client.changedstate.acquire()
1293
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
2289
client.changedstate.wait(delay.total_seconds())
1294
2290
client.changedstate.release()
1295
2291
time2 = datetime.datetime.now()
1296
2292
if (time2 - time) >= delay:
1306
2302
break
1307
2303
else:
1308
2304
delay -= time2 - time
1309
1310
sent_size = 0
1311
while sent_size < len(client.secret):
1312
try:
1313
sent = session.send(client.secret[sent_size:])
1314
except gnutls.errors.GNUTLSError as error:
1315
logger.warning("gnutls send failed")
1316
return
1317
logger.debug("Sent: %d, remaining: %d",
1318
sent, len(client.secret)
1319
- (sent_size + sent))
1320
sent_size += sent
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
1321
2312
1322
2313
logger.info("Sending secret to %s", client.name)
1323
# bump the timeout as if seen
1324
client.checked_ok()
2314
# bump the timeout using extended_timeout
2315
client.bump_timeout(client.extended_timeout)
1325
2316
if self.server.use_dbus:
1326
2317
# Emit D-Bus signal
1327
2318
client.GotSecret()
1328
2319
1329
2320
finally:
1330
2321
if approval_required:
1331
2322
client.approvals_pending -= 1
1332
2323
try:
1333
2324
session.bye()
1334
except gnutls.errors.GNUTLSError as error:
1335
logger.warning("GnuTLS bye failed")
1336
2325
except gnutls.Error as error:
2326
logger.warning("GnuTLS bye failed",
2327
exc_info=error)
2328
1337
2329
@staticmethod
1338
2330
def peer_certificate(session):
1339
2331
"Return the peer's OpenPGP certificate as a bytestring"
1340
2332
# If not an OpenPGP certificate...
1341
if (gnutls.library.functions
1342
.gnutls_certificate_type_get(session._c_object)
1343
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1344
# ...do the normal thing
1345
return session.peer_certificate
2333
if (gnutls.certificate_type_get(session._c_object)
2334
!= gnutls.CRT_OPENPGP):
2335
# ...return invalid data
2336
return b""
1346
2337
list_size = ctypes.c_uint(1)
1347
cert_list = (gnutls.library.functions
1348
.gnutls_certificate_get_peers
2338
cert_list = (gnutls.certificate_get_peers
1349
2339
(session._c_object, ctypes.byref(list_size)))
1350
2340
if not bool(cert_list) and list_size.value != 0:
1351
raise gnutls.errors.GNUTLSError("error getting peer"
1352
" certificate")
2341
raise gnutls.Error("error getting peer certificate")
1353
2342
if list_size.value == 0:
1354
2343
return None
1355
2344
cert = cert_list[0]
1356
2345
return ctypes.string_at(cert.data, cert.size)
1357
2346
1358
2347
@staticmethod
1359
2348
def fingerprint(openpgp):
1360
2349
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1361
2350
# New GnuTLS "datum" with the OpenPGP public key
1362
datum = (gnutls.library.types
1363
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1364
ctypes.POINTER
1365
(ctypes.c_ubyte)),
1366
ctypes.c_uint(len(openpgp))))
2351
datum = gnutls.datum_t(
2352
ctypes.cast(ctypes.c_char_p(openpgp),
2353
ctypes.POINTER(ctypes.c_ubyte)),
2354
ctypes.c_uint(len(openpgp)))
1367
2355
# New empty GnuTLS certificate
1368
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1369
(gnutls.library.functions
1370
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2356
crt = gnutls.openpgp_crt_t()
2357
gnutls.openpgp_crt_init(ctypes.byref(crt))
1371
2358
# Import the OpenPGP public key into the certificate
1372
(gnutls.library.functions
1373
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1374
gnutls.library.constants
1375
.GNUTLS_OPENPGP_FMT_RAW))
2359
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2360
gnutls.OPENPGP_FMT_RAW)
1376
2361
# Verify the self signature in the key
1377
2362
crtverify = ctypes.c_uint()
1378
(gnutls.library.functions
1379
.gnutls_openpgp_crt_verify_self(crt, 0,
1380
ctypes.byref(crtverify)))
2363
gnutls.openpgp_crt_verify_self(crt, 0,
2364
ctypes.byref(crtverify))
1381
2365
if crtverify.value != 0:
1382
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1383
raise (gnutls.errors.CertificateSecurityError
1384
("Verify failed"))
2366
gnutls.openpgp_crt_deinit(crt)
2367
raise gnutls.CertificateSecurityError("Verify failed")
1385
2368
# New buffer for the fingerprint
1386
2369
buf = ctypes.create_string_buffer(20)
1387
2370
buf_len = ctypes.c_size_t()
1388
2371
# Get the fingerprint from the certificate into the buffer
1389
(gnutls.library.functions
1390
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1391
ctypes.byref(buf_len)))
2372
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2373
ctypes.byref(buf_len))
1392
2374
# Deinit the certificate
1393
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2375
gnutls.openpgp_crt_deinit(crt)
1394
2376
# Convert the buffer to a Python bytestring
1395
2377
fpr = ctypes.string_at(buf, buf_len.value)
1396
2378
# Convert the bytestring to hexadecimal notation
1397
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2379
hex_fpr = binascii.hexlify(fpr).upper()
1398
2380
return hex_fpr
1399
2381
1400
2382
1401
2383
class MultiprocessingMixIn(object):
1402
2384
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2385
1403
2386
def sub_process_main(self, request, address):
1404
2387
try:
1405
2388
self.finish_request(request, address)
1406
except:
2389
except Exception:
1407
2390
self.handle_error(request, address)
1408
2391
self.close_request(request)
1409
2392
1410
2393
def process_request(self, request, address):
1411
2394
"""Start a new process to process the request."""
1412
multiprocessing.Process(target = self.sub_process_main,
1413
args = (request, address)).start()
2395
proc = multiprocessing.Process(target=self.sub_process_main,
2396
args=(request, address))
2397
proc.start()
2398
return proc
2399
1414
2400
1415
2401
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1416
2402
""" adds a pipe to the MixIn """
2403
1417
2404
def process_request(self, request, client_address):
1418
2405
"""Overrides and wraps the original process_request().
1419
2406
1420
2407
This function creates a new pipe in self.pipe
1421
2408
"""
1422
2409
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1423
2410
1424
super(MultiprocessingMixInWithPipe,
1425
self).process_request(request, client_address)
2411
proc = MultiprocessingMixIn.process_request(self, request,
2412
client_address)
1426
2413
self.child_pipe.close()
1427
self.add_pipe(parent_pipe)
2414
self.add_pipe(parent_pipe, proc)
1428
2415
1429
def add_pipe(self, parent_pipe):
2416
def add_pipe(self, parent_pipe, proc):
1430
2417
"""Dummy function; override as necessary"""
1431
raise NotImplementedError
2418
raise NotImplementedError()
2419
1432
2420
1433
2421
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1434
2422
socketserver.TCPServer, object):
1435
2423
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1436
2424
1437
2425
Attributes:
1438
2426
enabled: Boolean; whether this server is activated yet
1439
2427
interface: None or a network interface name (string)
1440
2428
use_ipv6: Boolean; to use IPv6 or not
1441
2429
"""
2430
1442
2431
def __init__(self, server_address, RequestHandlerClass,
1443
interface=None, use_ipv6=True):
2432
interface=None,
2433
use_ipv6=True,
2434
socketfd=None):
2435
"""If socketfd is set, use that file descriptor instead of
2436
creating a new one with socket.socket().
2437
"""
1444
2438
self.interface = interface
1445
2439
if use_ipv6:
1446
2440
self.address_family = socket.AF_INET6
2441
if socketfd is not None:
2442
# Save the file descriptor
2443
self.socketfd = socketfd
2444
# Save the original socket.socket() function
2445
self.socket_socket = socket.socket
2446
2447
# To implement --socket, we monkey patch socket.socket.
2448
#
2449
# (When socketserver.TCPServer is a new-style class, we
2450
# could make self.socket into a property instead of monkey
2451
# patching socket.socket.)
2452
#
2453
# Create a one-time-only replacement for socket.socket()
2454
@functools.wraps(socket.socket)
2455
def socket_wrapper(*args, **kwargs):
2456
# Restore original function so subsequent calls are
2457
# not affected.
2458
socket.socket = self.socket_socket
2459
del self.socket_socket
2460
# This time only, return a new socket object from the
2461
# saved file descriptor.
2462
return socket.fromfd(self.socketfd, *args, **kwargs)
2463
# Replace socket.socket() function with wrapper
2464
socket.socket = socket_wrapper
2465
# The socketserver.TCPServer.__init__ will call
2466
# socket.socket(), which might be our replacement,
2467
# socket_wrapper(), if socketfd was set.
1447
2468
socketserver.TCPServer.__init__(self, server_address,
1448
2469
RequestHandlerClass)
2470
1449
2471
def server_bind(self):
1450
2472
"""This overrides the normal server_bind() function
1451
2473
to bind to an interface if one was specified, and also NOT to
1452
2474
bind to an address or port if they were not specified."""
2475
global SO_BINDTODEVICE
1453
2476
if self.interface is not None:
1454
2477
if SO_BINDTODEVICE is None:
1455
logger.error("SO_BINDTODEVICE does not exist;"
1456
" cannot bind to interface %s",
1457
self.interface)
1458
else:
1459
try:
1460
self.socket.setsockopt(socket.SOL_SOCKET,
1461
SO_BINDTODEVICE,
1462
str(self.interface
1463
+ '\0'))
1464
except socket.error as error:
1465
if error[0] == errno.EPERM:
1466
logger.error("No permission to"
1467
" bind to interface %s",
1468
self.interface)
1469
elif error[0] == errno.ENOPROTOOPT:
1470
logger.error("SO_BINDTODEVICE not available;"
1471
" cannot bind to interface %s",
1472
self.interface)
1473
else:
1474
raise
2478
# Fall back to a hard-coded value which seems to be
2479
# common enough.
2480
logger.warning("SO_BINDTODEVICE not found, trying 25")
2481
SO_BINDTODEVICE = 25
2482
try:
2483
self.socket.setsockopt(
2484
socket.SOL_SOCKET, SO_BINDTODEVICE,
2485
(self.interface + "\0").encode("utf-8"))
2486
except socket.error as error:
2487
if error.errno == errno.EPERM:
2488
logger.error("No permission to bind to"
2489
" interface %s", self.interface)
2490
elif error.errno == errno.ENOPROTOOPT:
2491
logger.error("SO_BINDTODEVICE not available;"
2492
" cannot bind to interface %s",
2493
self.interface)
2494
elif error.errno == errno.ENODEV:
2495
logger.error("Interface %s does not exist,"
2496
" cannot bind", self.interface)
2497
else:
2498
raise
1475
2499
# Only bind(2) the socket if we really need to.
1476
2500
if self.server_address[0] or self.server_address[1]:
1477
2501
if not self.server_address[0]:
1478
2502
if self.address_family == socket.AF_INET6:
1479
any_address = "::" # in6addr_any
2503
any_address = "::" # in6addr_any
1480
2504
else:
1481
any_address = socket.INADDR_ANY
2505
any_address = "0.0.0.0" # INADDR_ANY
1482
2506
self.server_address = (any_address,
1483
2507
self.server_address[1])
1484
2508
elif not self.server_address[1]:
1485
self.server_address = (self.server_address[0],
1486
0)
2509
self.server_address = (self.server_address[0], 0)
1487
2510
# if self.interface:
1488
2511
# self.server_address = (self.server_address[0],
1489
2512
# 0, # port
1495
2518
1496
2519
class MandosServer(IPv6_TCPServer):
1497
2520
"""Mandos server.
1498
2521
1499
2522
Attributes:
1500
2523
clients: set of Client objects
1501
2524
gnutls_priority GnuTLS priority string
1502
2525
use_dbus: Boolean; to emit D-Bus signals or not
1503
1504
Assumes a gobject.MainLoop event loop.
2526
2527
Assumes a GLib.MainLoop event loop.
1505
2528
"""
2529
1506
2530
def __init__(self, server_address, RequestHandlerClass,
1507
interface=None, use_ipv6=True, clients=None,
1508
gnutls_priority=None, use_dbus=True):
2531
interface=None,
2532
use_ipv6=True,
2533
clients=None,
2534
gnutls_priority=None,
2535
use_dbus=True,
2536
socketfd=None):
1509
2537
self.enabled = False
1510
2538
self.clients = clients
1511
2539
if self.clients is None:
1512
self.clients = set()
2540
self.clients = {}
1513
2541
self.use_dbus = use_dbus
1514
2542
self.gnutls_priority = gnutls_priority
1515
2543
IPv6_TCPServer.__init__(self, server_address,
1516
2544
RequestHandlerClass,
1517
interface = interface,
1518
use_ipv6 = use_ipv6)
2545
interface=interface,
2546
use_ipv6=use_ipv6,
2547
socketfd=socketfd)
2548
1519
2549
def server_activate(self):
1520
2550
if self.enabled:
1521
2551
return socketserver.TCPServer.server_activate(self)
2552
1522
2553
def enable(self):
1523
2554
self.enabled = True
1524
def add_pipe(self, parent_pipe):
2555
2556
def add_pipe(self, parent_pipe, proc):
1525
2557
# Call "handle_ipc" for both data and EOF events
1526
gobject.io_add_watch(parent_pipe.fileno(),
1527
gobject.IO_IN | gobject.IO_HUP,
1528
functools.partial(self.handle_ipc,
1529
parent_pipe = parent_pipe))
1530
1531
def handle_ipc(self, source, condition, parent_pipe=None,
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,
1532
2568
client_object=None):
1533
condition_names = {
1534
gobject.IO_IN: "IN", # There is data to read.
1535
gobject.IO_OUT: "OUT", # Data can be written (without
1536
# blocking).
1537
gobject.IO_PRI: "PRI", # There is urgent data to read.
1538
gobject.IO_ERR: "ERR", # Error condition.
1539
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1540
# broken, usually for pipes and
1541
# sockets).
1542
}
1543
conditions_string = ' | '.join(name
1544
for cond, name in
1545
condition_names.iteritems()
1546
if cond & condition)
1547
# error or the other end of multiprocessing.Pipe has closed
1548
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
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()
1549
2573
return False
1550
2574
1551
2575
# Read a request from the child
1552
2576
request = parent_pipe.recv()
1553
2577
command = request[0]
1554
2578
1555
2579
if command == 'init':
1556
2580
fpr = request[1]
1557
2581
address = request[2]
1558
1559
for c in self.clients:
2582
2583
for c in self.clients.values():
1560
2584
if c.fingerprint == fpr:
1561
2585
client = c
1562
2586
break
1563
2587
else:
1564
logger.warning("Client not found for fingerprint: %s, ad"
1565
"dress: %s", fpr, address)
2588
logger.info("Client not found for fingerprint: %s, ad"
2589
"dress: %s", fpr, address)
1566
2590
if self.use_dbus:
1567
2591
# Emit D-Bus signal
1568
mandos_dbus_service.ClientNotFound(fpr, address[0])
2592
mandos_dbus_service.ClientNotFound(fpr,
2593
address[0])
1569
2594
parent_pipe.send(False)
1570
2595
return False
1571
1572
gobject.io_add_watch(parent_pipe.fileno(),
1573
gobject.IO_IN | gobject.IO_HUP,
1574
functools.partial(self.handle_ipc,
1575
parent_pipe = parent_pipe,
1576
client_object = client))
2596
2597
GLib.io_add_watch(
2598
parent_pipe.fileno(),
2599
GLib.IO_IN | GLib.IO_HUP,
2600
functools.partial(self.handle_ipc,
2601
parent_pipe=parent_pipe,
2602
proc=proc,
2603
client_object=client))
1577
2604
parent_pipe.send(True)
1578
# remove the old hook in favor of the new above hook on same fileno
2605
# remove the old hook in favor of the new above hook on
2606
# same fileno
1579
2607
return False
1580
2608
if command == 'funcall':
1581
2609
funcname = request[1]
1582
2610
args = request[2]
1583
2611
kwargs = request[3]
1584
1585
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
2612
2613
parent_pipe.send(('data', getattr(client_object,
2614
funcname)(*args,
2615
**kwargs)))
1586
2616
1587
2617
if command == 'getattr':
1588
2618
attrname = request[1]
1589
if callable(client_object.__getattribute__(attrname)):
1590
parent_pipe.send(('function',))
2619
if isinstance(client_object.__getattribute__(attrname),
2620
collections.Callable):
2621
parent_pipe.send(('function', ))
1591
2622
else:
1592
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1593
2623
parent_pipe.send((
2624
'data', client_object.__getattribute__(attrname)))
2625
1594
2626
if command == 'setattr':
1595
2627
attrname = request[1]
1596
2628
value = request[2]
1599
2631
return True
1600
2632
1601
2633
2634
def rfc3339_duration_to_delta(duration):
2635
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2636
2637
>>> rfc3339_duration_to_delta("P7D")
2638
datetime.timedelta(7)
2639
>>> rfc3339_duration_to_delta("PT60S")
2640
datetime.timedelta(0, 60)
2641
>>> rfc3339_duration_to_delta("PT60M")
2642
datetime.timedelta(0, 3600)
2643
>>> rfc3339_duration_to_delta("PT24H")
2644
datetime.timedelta(1)
2645
>>> rfc3339_duration_to_delta("P1W")
2646
datetime.timedelta(7)
2647
>>> rfc3339_duration_to_delta("PT5M30S")
2648
datetime.timedelta(0, 330)
2649
>>> rfc3339_duration_to_delta("P1DT3M20S")
2650
datetime.timedelta(1, 200)
2651
"""
2652
2653
# Parsing an RFC 3339 duration with regular expressions is not
2654
# possible - there would have to be multiple places for the same
2655
# values, like seconds. The current code, while more esoteric, is
2656
# cleaner without depending on a parsing library. If Python had a
2657
# built-in library for parsing we would use it, but we'd like to
2658
# avoid excessive use of external libraries.
2659
2660
# New type for defining tokens, syntax, and semantics all-in-one
2661
Token = collections.namedtuple("Token", (
2662
"regexp", # To match token; if "value" is not None, must have
2663
# a "group" containing digits
2664
"value", # datetime.timedelta or None
2665
"followers")) # Tokens valid after this token
2666
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2667
# the "duration" ABNF definition in RFC 3339, Appendix A.
2668
token_end = Token(re.compile(r"$"), None, frozenset())
2669
token_second = Token(re.compile(r"(\d+)S"),
2670
datetime.timedelta(seconds=1),
2671
frozenset((token_end, )))
2672
token_minute = Token(re.compile(r"(\d+)M"),
2673
datetime.timedelta(minutes=1),
2674
frozenset((token_second, token_end)))
2675
token_hour = Token(re.compile(r"(\d+)H"),
2676
datetime.timedelta(hours=1),
2677
frozenset((token_minute, token_end)))
2678
token_time = Token(re.compile(r"T"),
2679
None,
2680
frozenset((token_hour, token_minute,
2681
token_second)))
2682
token_day = Token(re.compile(r"(\d+)D"),
2683
datetime.timedelta(days=1),
2684
frozenset((token_time, token_end)))
2685
token_month = Token(re.compile(r"(\d+)M"),
2686
datetime.timedelta(weeks=4),
2687
frozenset((token_day, token_end)))
2688
token_year = Token(re.compile(r"(\d+)Y"),
2689
datetime.timedelta(weeks=52),
2690
frozenset((token_month, token_end)))
2691
token_week = Token(re.compile(r"(\d+)W"),
2692
datetime.timedelta(weeks=1),
2693
frozenset((token_end, )))
2694
token_duration = Token(re.compile(r"P"), None,
2695
frozenset((token_year, token_month,
2696
token_day, token_time,
2697
token_week)))
2698
# Define starting values:
2699
# Value so far
2700
value = datetime.timedelta()
2701
found_token = None
2702
# Following valid tokens
2703
followers = frozenset((token_duration, ))
2704
# String left to parse
2705
s = duration
2706
# Loop until end token is found
2707
while found_token is not token_end:
2708
# Search for any currently valid tokens
2709
for token in followers:
2710
match = token.regexp.match(s)
2711
if match is not None:
2712
# Token found
2713
if token.value is not None:
2714
# Value found, parse digits
2715
factor = int(match.group(1), 10)
2716
# Add to value so far
2717
value += factor * token.value
2718
# Strip token from string
2719
s = token.regexp.sub("", s, 1)
2720
# Go to found token
2721
found_token = token
2722
# Set valid next tokens
2723
followers = found_token.followers
2724
break
2725
else:
2726
# No currently valid tokens were found
2727
raise ValueError("Invalid RFC 3339 duration: {!r}"
2728
.format(duration))
2729
# End token found
2730
return value
2731
2732
1602
2733
def string_to_delta(interval):
1603
2734
"""Parse a string and return a datetime.timedelta
1604
2735
1605
2736
>>> string_to_delta('7d')
1606
2737
datetime.timedelta(7)
1607
2738
>>> string_to_delta('60s')
1615
2746
>>> string_to_delta('5m 30s')
1616
2747
datetime.timedelta(0, 330)
1617
2748
"""
2749
2750
try:
2751
return rfc3339_duration_to_delta(interval)
2752
except ValueError:
2753
pass
2754
1618
2755
timevalue = datetime.timedelta(0)
1619
2756
for s in interval.split():
1620
2757
try:
1621
suffix = unicode(s[-1])
2758
suffix = s[-1]
1622
2759
value = int(s[:-1])
1623
2760
if suffix == "d":
1624
2761
delta = datetime.timedelta(value)
1631
2768
elif suffix == "w":
1632
2769
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1633
2770
else:
1634
raise ValueError("Unknown suffix %r" % suffix)
1635
except (ValueError, IndexError) as e:
2771
raise ValueError("Unknown suffix {!r}".format(suffix))
2772
except IndexError as e:
1636
2773
raise ValueError(*(e.args))
1637
2774
timevalue += delta
1638
2775
return timevalue
1639
2776
1640
2777
1641
def if_nametoindex(interface):
1642
"""Call the C function if_nametoindex(), or equivalent
1643
1644
Note: This function cannot accept a unicode string."""
1645
global if_nametoindex
1646
try:
1647
if_nametoindex = (ctypes.cdll.LoadLibrary
1648
(ctypes.util.find_library("c"))
1649
.if_nametoindex)
1650
except (OSError, AttributeError):
1651
logger.warning("Doing if_nametoindex the hard way")
1652
def if_nametoindex(interface):
1653
"Get an interface index the hard way, i.e. using fcntl()"
1654
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1655
with contextlib.closing(socket.socket()) as s:
1656
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1657
struct.pack(str("16s16x"),
1658
interface))
1659
interface_index = struct.unpack(str("I"),
1660
ifreq[16:20])[0]
1661
return interface_index
1662
return if_nametoindex(interface)
1663
1664
1665
def daemon(nochdir = False, noclose = False):
2778
def daemon(nochdir=False, noclose=False):
1666
2779
"""See daemon(3). Standard BSD Unix function.
1667
2780
1668
2781
This should really exist as os.daemon, but it doesn't (yet)."""
1669
2782
if os.fork():
1670
2783
sys.exit()
1675
2788
sys.exit()
1676
2789
if not noclose:
1677
2790
# Close all standard open file descriptors
1678
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2791
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1679
2792
if not stat.S_ISCHR(os.fstat(null).st_mode):
1680
2793
raise OSError(errno.ENODEV,
1681
"%s not a character device"
1682
% os.path.devnull)
2794
"{} not a character device"
2795
.format(os.devnull))
1683
2796
os.dup2(null, sys.stdin.fileno())
1684
2797
os.dup2(null, sys.stdout.fileno())
1685
2798
os.dup2(null, sys.stderr.fileno())
1688
2801
1689
2802
1690
2803
def main():
1691
2804
1692
2805
##################################################################
1693
2806
# Parsing of options, both command line and config file
1694
2807
1695
2808
parser = argparse.ArgumentParser()
1696
2809
parser.add_argument("-v", "--version", action="version",
1697
version = "%%(prog)s %s" % version,
2810
version="%(prog)s {}".format(version),
1698
2811
help="show version number and exit")
1699
2812
parser.add_argument("-i", "--interface", metavar="IF",
1700
2813
help="Bind to interface IF")
1706
2819
help="Run self-test")
1707
2820
parser.add_argument("--debug", action="store_true",
1708
2821
help="Debug mode; run in foreground and log"
1709
" to terminal")
2822
" to terminal", default=None)
1710
2823
parser.add_argument("--debuglevel", metavar="LEVEL",
1711
2824
help="Debug level for stdout output")
1712
2825
parser.add_argument("--priority", help="GnuTLS"
1719
2832
" files")
1720
2833
parser.add_argument("--no-dbus", action="store_false",
1721
2834
dest="use_dbus", help="Do not provide D-Bus"
1722
" system bus interface")
2835
" system bus interface", default=None)
1723
2836
parser.add_argument("--no-ipv6", action="store_false",
1724
dest="use_ipv6", help="Do not use IPv6")
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
1725
2853
options = parser.parse_args()
1726
2854
1727
2855
if options.check:
1728
2856
import doctest
1729
doctest.testmod()
1730
sys.exit()
1731
2857
fail_count, test_count = doctest.testmod()
2858
sys.exit(os.EX_OK if fail_count == 0 else 1)
2859
1732
2860
# Default values for config file for server-global settings
1733
server_defaults = { "interface": "",
1734
"address": "",
1735
"port": "",
1736
"debug": "False",
1737
"priority":
1738
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1739
"servicename": "Mandos",
1740
"use_dbus": "True",
1741
"use_ipv6": "True",
1742
"debuglevel": "",
1743
}
1744
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
1745
2879
# Parse config file for server-global settings
1746
2880
server_config = configparser.SafeConfigParser(server_defaults)
1747
2881
del server_defaults
1748
server_config.read(os.path.join(options.configdir,
1749
"mandos.conf"))
2882
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1750
2883
# Convert the SafeConfigParser object to a dict
1751
2884
server_settings = server_config.defaults()
1752
2885
# Use the appropriate methods on the non-string config options
1753
for option in ("debug", "use_dbus", "use_ipv6"):
2886
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1754
2887
server_settings[option] = server_config.getboolean("DEFAULT",
1755
2888
option)
1756
2889
if server_settings["port"]:
1757
2890
server_settings["port"] = server_config.getint("DEFAULT",
1758
2891
"port")
2892
if server_settings["socket"]:
2893
server_settings["socket"] = server_config.getint("DEFAULT",
2894
"socket")
2895
# Later, stdin will, and stdout and stderr might, be dup'ed
2896
# over with an opened os.devnull. But we don't want this to
2897
# happen with a supplied network socket.
2898
if 0 <= server_settings["socket"] <= 2:
2899
server_settings["socket"] = os.dup(server_settings
2900
["socket"])
1759
2901
del server_config
1760
2902
1761
2903
# Override the settings from the config file with command line
1762
2904
# options, if set.
1763
2905
for option in ("interface", "address", "port", "debug",
1764
"priority", "servicename", "configdir",
1765
"use_dbus", "use_ipv6", "debuglevel"):
2906
"priority", "servicename", "configdir", "use_dbus",
2907
"use_ipv6", "debuglevel", "restore", "statedir",
2908
"socket", "foreground", "zeroconf"):
1766
2909
value = getattr(options, option)
1767
2910
if value is not None:
1768
2911
server_settings[option] = value
1769
2912
del options
1770
2913
# Force all strings to be unicode
1771
2914
for option in server_settings.keys():
1772
if type(server_settings[option]) is str:
1773
server_settings[option] = unicode(server_settings[option])
2915
if isinstance(server_settings[option], bytes):
2916
server_settings[option] = (server_settings[option]
2917
.decode("utf-8"))
2918
# Force all boolean options to be boolean
2919
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2920
"foreground", "zeroconf"):
2921
server_settings[option] = bool(server_settings[option])
2922
# Debug implies foreground
2923
if server_settings["debug"]:
2924
server_settings["foreground"] = True
1774
2925
# Now we have our good server settings in "server_settings"
1775
2926
1776
2927
##################################################################
1777
2928
2929
if (not server_settings["zeroconf"]
2930
and not (server_settings["port"]
2931
or server_settings["socket"] != "")):
2932
parser.error("Needs port or socket to work without Zeroconf")
2933
1778
2934
# For convenience
1779
2935
debug = server_settings["debug"]
1780
2936
debuglevel = server_settings["debuglevel"]
1781
2937
use_dbus = server_settings["use_dbus"]
1782
2938
use_ipv6 = server_settings["use_ipv6"]
2939
stored_state_path = os.path.join(server_settings["statedir"],
2940
stored_state_file)
2941
foreground = server_settings["foreground"]
2942
zeroconf = server_settings["zeroconf"]
2943
2944
if debug:
2945
initlogger(debug, logging.DEBUG)
2946
else:
2947
if not debuglevel:
2948
initlogger(debug)
2949
else:
2950
level = getattr(logging, debuglevel.upper())
2951
initlogger(debug, level)
1783
2952
1784
2953
if server_settings["servicename"] != "Mandos":
1785
syslogger.setFormatter(logging.Formatter
1786
('Mandos (%s) [%%(process)d]:'
1787
' %%(levelname)s: %%(message)s'
1788
% server_settings["servicename"]))
1789
2954
syslogger.setFormatter(
2955
logging.Formatter('Mandos ({}) [%(process)d]:'
2956
' %(levelname)s: %(message)s'.format(
2957
server_settings["servicename"])))
2958
1790
2959
# Parse config file with clients
1791
client_defaults = { "timeout": "1h",
1792
"interval": "5m",
1793
"checker": "fping -q -- %%(host)s",
1794
"host": "",
1795
"approval_delay": "0s",
1796
"approval_duration": "1s",
1797
}
1798
client_config = configparser.SafeConfigParser(client_defaults)
2960
client_config = configparser.SafeConfigParser(Client
2961
.client_defaults)
1799
2962
client_config.read(os.path.join(server_settings["configdir"],
1800
2963
"clients.conf"))
1801
2964
1802
2965
global mandos_dbus_service
1803
2966
mandos_dbus_service = None
1804
1805
tcp_server = MandosServer((server_settings["address"],
1806
server_settings["port"]),
1807
ClientHandler,
1808
interface=(server_settings["interface"]
1809
or None),
1810
use_ipv6=use_ipv6,
1811
gnutls_priority=
1812
server_settings["priority"],
1813
use_dbus=use_dbus)
1814
if not debug:
1815
pidfilename = "/var/run/mandos.pid"
1816
try:
1817
pidfile = open(pidfilename, "w")
1818
except IOError:
1819
logger.error("Could not open file %r", pidfilename)
1820
1821
try:
1822
uid = pwd.getpwnam("_mandos").pw_uid
1823
gid = pwd.getpwnam("_mandos").pw_gid
1824
except KeyError:
1825
try:
1826
uid = pwd.getpwnam("mandos").pw_uid
1827
gid = pwd.getpwnam("mandos").pw_gid
2967
2968
socketfd = None
2969
if server_settings["socket"] != "":
2970
socketfd = server_settings["socket"]
2971
tcp_server = MandosServer(
2972
(server_settings["address"], server_settings["port"]),
2973
ClientHandler,
2974
interface=(server_settings["interface"] or None),
2975
use_ipv6=use_ipv6,
2976
gnutls_priority=server_settings["priority"],
2977
use_dbus=use_dbus,
2978
socketfd=socketfd)
2979
if not foreground:
2980
pidfilename = "/run/mandos.pid"
2981
if not os.path.isdir("/run/."):
2982
pidfilename = "/var/run/mandos.pid"
2983
pidfile = None
2984
try:
2985
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2986
except IOError as e:
2987
logger.error("Could not open file %r", pidfilename,
2988
exc_info=e)
2989
2990
for name, group in (("_mandos", "_mandos"),
2991
("mandos", "mandos"),
2992
("nobody", "nogroup")):
2993
try:
2994
uid = pwd.getpwnam(name).pw_uid
2995
gid = pwd.getpwnam(group).pw_gid
2996
break
1828
2997
except KeyError:
1829
try:
1830
uid = pwd.getpwnam("nobody").pw_uid
1831
gid = pwd.getpwnam("nobody").pw_gid
1832
except KeyError:
1833
uid = 65534
1834
gid = 65534
2998
continue
2999
else:
3000
uid = 65534
3001
gid = 65534
1835
3002
try:
1836
3003
os.setgid(gid)
1837
3004
os.setuid(uid)
3005
if debug:
3006
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3007
gid))
1838
3008
except OSError as error:
1839
if error[0] != errno.EPERM:
1840
raise error
1841
1842
if not debug and not debuglevel:
1843
syslogger.setLevel(logging.WARNING)
1844
console.setLevel(logging.WARNING)
1845
if debuglevel:
1846
level = getattr(logging, debuglevel.upper())
1847
syslogger.setLevel(level)
1848
console.setLevel(level)
3009
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3010
.format(uid, gid, os.strerror(error.errno)))
3011
if error.errno != errno.EPERM:
3012
raise
1849
3013
1850
3014
if debug:
1851
3015
# Enable all possible GnuTLS debugging
1852
3016
1853
3017
# "Use a log level over 10 to enable all debugging options."
1854
3018
# - GnuTLS manual
1855
gnutls.library.functions.gnutls_global_set_log_level(11)
1856
1857
@gnutls.library.types.gnutls_log_func
3019
gnutls.global_set_log_level(11)
3020
3021
@gnutls.log_func
1858
3022
def debug_gnutls(level, string):
1859
3023
logger.debug("GnuTLS: %s", string[:-1])
1860
1861
(gnutls.library.functions
1862
.gnutls_global_set_log_function(debug_gnutls))
1863
3024
3025
gnutls.global_set_log_function(debug_gnutls)
3026
1864
3027
# Redirect stdin so all checkers get /dev/null
1865
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3028
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1866
3029
os.dup2(null, sys.stdin.fileno())
1867
3030
if null > 2:
1868
3031
os.close(null)
1869
else:
1870
# No console logging
1871
logger.removeHandler(console)
1872
3032
1873
3033
# Need to fork before connecting to D-Bus
1874
if not debug:
3034
if not foreground:
1875
3035
# Close all input and output, do double fork, etc.
1876
3036
daemon()
1877
3037
3038
# multiprocessing will use threads, so before we use GLib we need
3039
# to inform GLib that threads will be used.
3040
GLib.threads_init()
3041
1878
3042
global main_loop
1879
3043
# From the Avahi example code
1880
DBusGMainLoop(set_as_default=True )
1881
main_loop = gobject.MainLoop()
3044
DBusGMainLoop(set_as_default=True)
3045
main_loop = GLib.MainLoop()
1882
3046
bus = dbus.SystemBus()
1883
3047
# End of Avahi example code
1884
3048
if use_dbus:
1885
3049
try:
1886
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1887
bus, do_not_queue=True)
1888
except dbus.exceptions.NameExistsException as e:
1889
logger.error(unicode(e) + ", disabling D-Bus")
3050
bus_name = dbus.service.BusName("se.recompile.Mandos",
3051
bus,
3052
do_not_queue=True)
3053
old_bus_name = dbus.service.BusName(
3054
"se.bsnet.fukt.Mandos", bus,
3055
do_not_queue=True)
3056
except dbus.exceptions.DBusException as e:
3057
logger.error("Disabling D-Bus:", exc_info=e)
1890
3058
use_dbus = False
1891
3059
server_settings["use_dbus"] = False
1892
3060
tcp_server.use_dbus = False
1893
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1894
service = AvahiService(name = server_settings["servicename"],
1895
servicetype = "_mandos._tcp",
1896
protocol = protocol, bus = bus)
1897
if server_settings["interface"]:
1898
service.interface = (if_nametoindex
1899
(str(server_settings["interface"])))
1900
3061
if zeroconf:
3062
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3063
service = AvahiServiceToSyslog(
3064
name=server_settings["servicename"],
3065
servicetype="_mandos._tcp",
3066
protocol=protocol,
3067
bus=bus)
3068
if server_settings["interface"]:
3069
service.interface = if_nametoindex(
3070
server_settings["interface"].encode("utf-8"))
3071
1901
3072
global multiprocessing_manager
1902
3073
multiprocessing_manager = multiprocessing.Manager()
1903
3074
1904
3075
client_class = Client
1905
3076
if use_dbus:
1906
client_class = functools.partial(ClientDBus, bus = bus)
1907
def client_config_items(config, section):
1908
special_settings = {
1909
"approved_by_default":
1910
lambda: config.getboolean(section,
1911
"approved_by_default"),
1912
}
1913
for name, value in config.items(section):
3077
client_class = functools.partial(ClientDBus, bus=bus)
3078
3079
client_settings = Client.config_parser(client_config)
3080
old_client_settings = {}
3081
clients_data = {}
3082
3083
# This is used to redirect stdout and stderr for checker processes
3084
global wnull
3085
wnull = open(os.devnull, "w") # A writable /dev/null
3086
# Only used if server is running in foreground but not in debug
3087
# mode
3088
if debug or not foreground:
3089
wnull.close()
3090
3091
# Get client data and settings from last running state.
3092
if server_settings["restore"]:
3093
try:
3094
with open(stored_state_path, "rb") as stored_state:
3095
if sys.version_info.major == 2:
3096
clients_data, old_client_settings = pickle.load(
3097
stored_state)
3098
else:
3099
bytes_clients_data, bytes_old_client_settings = (
3100
pickle.load(stored_state, encoding="bytes"))
3101
# Fix bytes to strings
3102
# clients_data
3103
# .keys()
3104
clients_data = {(key.decode("utf-8")
3105
if isinstance(key, bytes)
3106
else key): value
3107
for key, value in
3108
bytes_clients_data.items()}
3109
del bytes_clients_data
3110
for key in clients_data:
3111
value = {(k.decode("utf-8")
3112
if isinstance(k, bytes) else k): v
3113
for k, v in
3114
clients_data[key].items()}
3115
clients_data[key] = value
3116
# .client_structure
3117
value["client_structure"] = [
3118
(s.decode("utf-8")
3119
if isinstance(s, bytes)
3120
else s) for s in
3121
value["client_structure"]]
3122
# .name & .host
3123
for k in ("name", "host"):
3124
if isinstance(value[k], bytes):
3125
value[k] = value[k].decode("utf-8")
3126
# old_client_settings
3127
# .keys()
3128
old_client_settings = {
3129
(key.decode("utf-8")
3130
if isinstance(key, bytes)
3131
else key): value
3132
for key, value in
3133
bytes_old_client_settings.items()}
3134
del bytes_old_client_settings
3135
# .host
3136
for value in old_client_settings.values():
3137
if isinstance(value["host"], bytes):
3138
value["host"] = (value["host"]
3139
.decode("utf-8"))
3140
os.remove(stored_state_path)
3141
except IOError as e:
3142
if e.errno == errno.ENOENT:
3143
logger.warning("Could not load persistent state:"
3144
" {}".format(os.strerror(e.errno)))
3145
else:
3146
logger.critical("Could not load persistent state:",
3147
exc_info=e)
3148
raise
3149
except EOFError as e:
3150
logger.warning("Could not load persistent state: "
3151
"EOFError:",
3152
exc_info=e)
3153
3154
with PGPEngine() as pgp:
3155
for client_name, client in clients_data.items():
3156
# Skip removed clients
3157
if client_name not in client_settings:
3158
continue
3159
3160
# Decide which value to use after restoring saved state.
3161
# We have three different values: Old config file,
3162
# new config file, and saved state.
3163
# New config value takes precedence if it differs from old
3164
# config value, otherwise use saved state.
3165
for name, value in client_settings[client_name].items():
3166
try:
3167
# For each value in new config, check if it
3168
# differs from the old config value (Except for
3169
# the "secret" attribute)
3170
if (name != "secret"
3171
and (value !=
3172
old_client_settings[client_name][name])):
3173
client[name] = value
3174
except KeyError:
3175
pass
3176
3177
# Clients who has passed its expire date can still be
3178
# enabled if its last checker was successful. A Client
3179
# whose checker succeeded before we stored its state is
3180
# assumed to have successfully run all checkers during
3181
# downtime.
3182
if client["enabled"]:
3183
if datetime.datetime.utcnow() >= client["expires"]:
3184
if not client["last_checked_ok"]:
3185
logger.warning(
3186
"disabling client {} - Client never "
3187
"performed a successful checker".format(
3188
client_name))
3189
client["enabled"] = False
3190
elif client["last_checker_status"] != 0:
3191
logger.warning(
3192
"disabling client {} - Client last"
3193
" checker failed with error code"
3194
" {}".format(
3195
client_name,
3196
client["last_checker_status"]))
3197
client["enabled"] = False
3198
else:
3199
client["expires"] = (
3200
datetime.datetime.utcnow()
3201
+ client["timeout"])
3202
logger.debug("Last checker succeeded,"
3203
" keeping {} enabled".format(
3204
client_name))
1914
3205
try:
1915
yield (name, special_settings[name]())
1916
except KeyError:
1917
yield (name, value)
1918
1919
tcp_server.clients.update(set(
1920
client_class(name = section,
1921
config= dict(client_config_items(
1922
client_config, section)))
1923
for section in client_config.sections()))
3206
client["secret"] = pgp.decrypt(
3207
client["encrypted_secret"],
3208
client_settings[client_name]["secret"])
3209
except PGPError:
3210
# If decryption fails, we use secret from new settings
3211
logger.debug("Failed to decrypt {} old secret".format(
3212
client_name))
3213
client["secret"] = (client_settings[client_name]
3214
["secret"])
3215
3216
# Add/remove clients based on new changes made to config
3217
for client_name in (set(old_client_settings)
3218
- set(client_settings)):
3219
del clients_data[client_name]
3220
for client_name in (set(client_settings)
3221
- set(old_client_settings)):
3222
clients_data[client_name] = client_settings[client_name]
3223
3224
# Create all client objects
3225
for client_name, client in clients_data.items():
3226
tcp_server.clients[client_name] = client_class(
3227
name=client_name,
3228
settings=client,
3229
server_settings=server_settings)
3230
1924
3231
if not tcp_server.clients:
1925
3232
logger.warning("No clients defined")
1926
1927
if not debug:
1928
try:
1929
with pidfile:
1930
pid = os.getpid()
1931
pidfile.write(str(pid) + "\n".encode("utf-8"))
1932
del pidfile
1933
except IOError:
1934
logger.error("Could not write to file %r with PID %d",
1935
pidfilename, pid)
1936
except NameError:
1937
# "pidfile" was never created
1938
pass
3233
3234
if not foreground:
3235
if pidfile is not None:
3236
pid = os.getpid()
3237
try:
3238
with pidfile:
3239
print(pid, file=pidfile)
3240
except IOError:
3241
logger.error("Could not write to file %r with PID %d",
3242
pidfilename, pid)
3243
del pidfile
1939
3244
del pidfilename
1940
1941
signal.signal(signal.SIGINT, signal.SIG_IGN)
1942
1943
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1944
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1945
3245
3246
for termsig in (signal.SIGHUP, signal.SIGTERM):
3247
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3248
lambda: main_loop.quit() and False)
3249
1946
3250
if use_dbus:
1947
class MandosDBusService(dbus.service.Object):
3251
3252
@alternate_dbus_interfaces(
3253
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3254
class MandosDBusService(DBusObjectWithObjectManager):
1948
3255
"""A D-Bus proxy object"""
3256
1949
3257
def __init__(self):
1950
3258
dbus.service.Object.__init__(self, bus, "/")
1951
_interface = "se.bsnet.fukt.Mandos"
1952
3259
3260
_interface = "se.recompile.Mandos"
3261
1953
3262
@dbus.service.signal(_interface, signature="o")
1954
3263
def ClientAdded(self, objpath):
1955
3264
"D-Bus signal"
1956
3265
pass
1957
3266
1958
3267
@dbus.service.signal(_interface, signature="ss")
1959
3268
def ClientNotFound(self, fingerprint, address):
1960
3269
"D-Bus signal"
1961
3270
pass
1962
3271
3272
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3273
"true"})
1963
3274
@dbus.service.signal(_interface, signature="os")
1964
3275
def ClientRemoved(self, objpath, name):
1965
3276
"D-Bus signal"
1966
3277
pass
1967
3278
3279
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3280
"true"})
1968
3281
@dbus.service.method(_interface, out_signature="ao")
1969
3282
def GetAllClients(self):
1970
3283
"D-Bus method"
1971
return dbus.Array(c.dbus_object_path
1972
for c in tcp_server.clients)
1973
3284
return dbus.Array(c.dbus_object_path for c in
3285
tcp_server.clients.values())
3286
3287
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3288
"true"})
1974
3289
@dbus.service.method(_interface,
1975
3290
out_signature="a{oa{sv}}")
1976
3291
def GetAllClientsWithProperties(self):
1977
3292
"D-Bus method"
1978
3293
return dbus.Dictionary(
1979
((c.dbus_object_path, c.GetAll(""))
1980
for c in tcp_server.clients),
3294
{c.dbus_object_path: c.GetAll(
3295
"se.recompile.Mandos.Client")
3296
for c in tcp_server.clients.values()},
1981
3297
signature="oa{sv}")
1982
3298
1983
3299
@dbus.service.method(_interface, in_signature="o")
1984
3300
def RemoveClient(self, object_path):
1985
3301
"D-Bus method"
1986
for c in tcp_server.clients:
3302
for c in tcp_server.clients.values():
1987
3303
if c.dbus_object_path == object_path:
1988
tcp_server.clients.remove(c)
3304
del tcp_server.clients[c.name]
1989
3305
c.remove_from_connection()
1990
# Don't signal anything except ClientRemoved
3306
# Don't signal the disabling
1991
3307
c.disable(quiet=True)
1992
# Emit D-Bus signal
1993
self.ClientRemoved(object_path, c.name)
3308
# Emit D-Bus signal for removal
3309
self.client_removed_signal(c)
1994
3310
return
1995
3311
raise KeyError(object_path)
1996
3312
1997
3313
del _interface
1998
3314
3315
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3316
out_signature="a{oa{sa{sv}}}")
3317
def GetManagedObjects(self):
3318
"""D-Bus method"""
3319
return dbus.Dictionary(
3320
{client.dbus_object_path:
3321
dbus.Dictionary(
3322
{interface: client.GetAll(interface)
3323
for interface in
3324
client._get_all_interface_names()})
3325
for client in tcp_server.clients.values()})
3326
3327
def client_added_signal(self, client):
3328
"""Send the new standard signal and the old signal"""
3329
if use_dbus:
3330
# New standard signal
3331
self.InterfacesAdded(
3332
client.dbus_object_path,
3333
dbus.Dictionary(
3334
{interface: client.GetAll(interface)
3335
for interface in
3336
client._get_all_interface_names()}))
3337
# Old signal
3338
self.ClientAdded(client.dbus_object_path)
3339
3340
def client_removed_signal(self, client):
3341
"""Send the new standard signal and the old signal"""
3342
if use_dbus:
3343
# New standard signal
3344
self.InterfacesRemoved(
3345
client.dbus_object_path,
3346
client._get_all_interface_names())
3347
# Old signal
3348
self.ClientRemoved(client.dbus_object_path,
3349
client.name)
3350
1999
3351
mandos_dbus_service = MandosDBusService()
2000
3352
3353
# Save modules to variables to exempt the modules from being
3354
# unloaded before the function registered with atexit() is run.
3355
mp = multiprocessing
3356
wn = wnull
3357
2001
3358
def cleanup():
2002
3359
"Cleanup function; run on exit"
2003
service.cleanup()
2004
3360
if zeroconf:
3361
service.cleanup()
3362
3363
mp.active_children()
3364
wn.close()
3365
if not (tcp_server.clients or client_settings):
3366
return
3367
3368
# Store client before exiting. Secrets are encrypted with key
3369
# based on what config file has. If config file is
3370
# removed/edited, old secret will thus be unrecovable.
3371
clients = {}
3372
with PGPEngine() as pgp:
3373
for client in tcp_server.clients.values():
3374
key = client_settings[client.name]["secret"]
3375
client.encrypted_secret = pgp.encrypt(client.secret,
3376
key)
3377
client_dict = {}
3378
3379
# A list of attributes that can not be pickled
3380
# + secret.
3381
exclude = {"bus", "changedstate", "secret",
3382
"checker", "server_settings"}
3383
for name, typ in inspect.getmembers(dbus.service
3384
.Object):
3385
exclude.add(name)
3386
3387
client_dict["encrypted_secret"] = (client
3388
.encrypted_secret)
3389
for attr in client.client_structure:
3390
if attr not in exclude:
3391
client_dict[attr] = getattr(client, attr)
3392
3393
clients[client.name] = client_dict
3394
del client_settings[client.name]["secret"]
3395
3396
try:
3397
with tempfile.NamedTemporaryFile(
3398
mode='wb',
3399
suffix=".pickle",
3400
prefix='clients-',
3401
dir=os.path.dirname(stored_state_path),
3402
delete=False) as stored_state:
3403
pickle.dump((clients, client_settings), stored_state,
3404
protocol=2)
3405
tempname = stored_state.name
3406
os.rename(tempname, stored_state_path)
3407
except (IOError, OSError) as e:
3408
if not debug:
3409
try:
3410
os.remove(tempname)
3411
except NameError:
3412
pass
3413
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3414
logger.warning("Could not save persistent state: {}"
3415
.format(os.strerror(e.errno)))
3416
else:
3417
logger.warning("Could not save persistent state:",
3418
exc_info=e)
3419
raise
3420
3421
# Delete all clients, and settings from config
2005
3422
while tcp_server.clients:
2006
client = tcp_server.clients.pop()
3423
name, client = tcp_server.clients.popitem()
2007
3424
if use_dbus:
2008
3425
client.remove_from_connection()
2009
client.disable_hook = None
2010
# Don't signal anything except ClientRemoved
3426
# Don't signal the disabling
2011
3427
client.disable(quiet=True)
3428
# Emit D-Bus signal for removal
2012
3429
if use_dbus:
2013
# Emit D-Bus signal
2014
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2015
client.name)
2016
3430
mandos_dbus_service.client_removed_signal(client)
3431
client_settings.clear()
3432
2017
3433
atexit.register(cleanup)
2018
2019
for client in tcp_server.clients:
3434
3435
for client in tcp_server.clients.values():
2020
3436
if use_dbus:
2021
# Emit D-Bus signal
2022
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2023
client.enable()
2024
3437
# Emit D-Bus signal for adding
3438
mandos_dbus_service.client_added_signal(client)
3439
# Need to initiate checking of clients
3440
if client.enabled:
3441
client.init_checker()
3442
2025
3443
tcp_server.enable()
2026
3444
tcp_server.server_activate()
2027
3445
2028
3446
# Find out what port we got
2029
service.port = tcp_server.socket.getsockname()[1]
3447
if zeroconf:
3448
service.port = tcp_server.socket.getsockname()[1]
2030
3449
if use_ipv6:
2031
3450
logger.info("Now listening on address %r, port %d,"
2032
" flowinfo %d, scope_id %d"
2033
% tcp_server.socket.getsockname())
3451
" flowinfo %d, scope_id %d",
3452
*tcp_server.socket.getsockname())
2034
3453
else: # IPv4
2035
logger.info("Now listening on address %r, port %d"
2036
% tcp_server.socket.getsockname())
2037
2038
#service.interface = tcp_server.socket.getsockname()[3]
2039
3454
logger.info("Now listening on address %r, port %d",
3455
*tcp_server.socket.getsockname())
3456
3457
# service.interface = tcp_server.socket.getsockname()[3]
3458
2040
3459
try:
2041
# From the Avahi example code
2042
try:
2043
service.activate()
2044
except dbus.exceptions.DBusException as error:
2045
logger.critical("DBusException: %s", error)
2046
cleanup()
2047
sys.exit(1)
2048
# End of Avahi example code
2049
2050
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2051
lambda *args, **kwargs:
2052
(tcp_server.handle_request
2053
(*args[2:], **kwargs) or True))
2054
3460
if zeroconf:
3461
# From the Avahi example code
3462
try:
3463
service.activate()
3464
except dbus.exceptions.DBusException as error:
3465
logger.critical("D-Bus Exception", exc_info=error)
3466
cleanup()
3467
sys.exit(1)
3468
# End of Avahi example code
3469
3470
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3471
lambda *args, **kwargs:
3472
(tcp_server.handle_request
3473
(*args[2:], **kwargs) or True))
3474
2055
3475
logger.debug("Starting main loop")
2056
3476
main_loop.run()
2057
3477
except AvahiError as error:
2058
logger.critical("AvahiError: %s", error)
3478
logger.critical("Avahi Error", exc_info=error)
2059
3479
cleanup()
2060
3480
sys.exit(1)
2061
3481
except KeyboardInterrupt:
2066
3486
# Must run before the D-Bus bus name gets deregistered
2067
3487
cleanup()
2068
3488
3489
2069
3490
if __name__ == '__main__':
2070
3491
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0