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- Committer: Teddy Hogeborn
- Date: 2011-02-27 17:26:35 UTC
- Revision ID: teddy@fukt.bsnet.se-20110227172635-hw1sire7k3vuo1co
Update copyright year to "2011" wherever appropriate.
- files added:
- initramfs-tools-hook-conf
- files removed:
- bugs.xml
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
5
#
5
#
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2019 Teddy Hogeborn
15
# Copyright © 2008-2019 Björn Påhlsson
16
#
17
# This file is part of Mandos.
18
#
19
# Mandos is free software: you can redistribute it and/or modify it
20
# under the terms of the GNU General Public License as published by
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
21
19
# the Free Software Foundation, either version 3 of the License, or
22
20
# (at your option) any later version.
23
21
#
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
26
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27
25
# GNU General Public License for more details.
28
#
26
#
29
27
# You should have received a copy of the GNU General Public License
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
32
# Contact the authors at <mandos@recompile.se>.
33
#
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
34
33
35
34
from __future__ import (division, absolute_import, print_function,
36
35
unicode_literals)
37
36
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
37
import SocketServer as socketserver
47
38
import socket
48
import argparse
39
import optparse
49
40
import datetime
50
41
import errno
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
55
49
import sys
56
50
import re
57
51
import os
66
60
import struct
67
61
import fcntl
68
62
import functools
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
63
import cPickle as pickle
73
64
import multiprocessing
74
import types
75
import binascii
76
import tempfile
77
import itertools
78
import collections
79
import codecs
80
65
81
66
import dbus
82
67
import dbus.service
83
from gi.repository import GLib
68
import gobject
69
import avahi
84
70
from dbus.mainloop.glib import DBusGMainLoop
85
71
import ctypes
86
72
import ctypes.util
87
73
import xml.dom.minidom
88
74
import inspect
89
75
90
# Try to find the value of SO_BINDTODEVICE:
91
76
try:
92
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
93
# newer, and it is also the most natural place for it:
94
77
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
95
78
except AttributeError:
96
79
try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
99
80
from IN import SO_BINDTODEVICE
100
81
except ImportError:
101
# In Python 2.7 it seems to have been removed entirely.
102
# Try running the C preprocessor:
103
try:
104
cc = subprocess.Popen(["cc", "--language=c", "-E",
105
"/dev/stdin"],
106
stdin=subprocess.PIPE,
107
stdout=subprocess.PIPE)
108
stdout = cc.communicate(
109
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
110
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
111
except (OSError, ValueError, IndexError):
112
# No value found
113
SO_BINDTODEVICE = None
114
115
if sys.version_info.major == 2:
116
str = unicode
117
118
version = "1.8.2"
119
stored_state_file = "clients.pickle"
120
121
logger = logging.getLogger()
122
syslogger = None
123
124
try:
125
if_nametoindex = ctypes.cdll.LoadLibrary(
126
ctypes.util.find_library("c")).if_nametoindex
127
except (OSError, AttributeError):
128
129
def if_nametoindex(interface):
130
"Get an interface index the hard way, i.e. using fcntl()"
131
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
132
with contextlib.closing(socket.socket()) as s:
133
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
134
struct.pack(b"16s16x", interface))
135
interface_index = struct.unpack("I", ifreq[16:20])[0]
136
return interface_index
137
138
139
def copy_function(func):
140
"""Make a copy of a function"""
141
if sys.version_info.major == 2:
142
return types.FunctionType(func.func_code,
143
func.func_globals,
144
func.func_name,
145
func.func_defaults,
146
func.func_closure)
147
else:
148
return types.FunctionType(func.__code__,
149
func.__globals__,
150
func.__name__,
151
func.__defaults__,
152
func.__closure__)
153
154
155
def initlogger(debug, level=logging.WARNING):
156
"""init logger and add loglevel"""
157
158
global syslogger
159
syslogger = (logging.handlers.SysLogHandler(
160
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
161
address="/dev/log"))
162
syslogger.setFormatter(logging.Formatter
163
('Mandos [%(process)d]: %(levelname)s:'
164
' %(message)s'))
165
logger.addHandler(syslogger)
166
167
if debug:
168
console = logging.StreamHandler()
169
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
170
' [%(process)d]:'
171
' %(levelname)s:'
172
' %(message)s'))
173
logger.addHandler(console)
174
logger.setLevel(level)
175
176
177
class PGPError(Exception):
178
"""Exception if encryption/decryption fails"""
179
pass
180
181
182
class PGPEngine(object):
183
"""A simple class for OpenPGP symmetric encryption & decryption"""
184
185
def __init__(self):
186
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
187
self.gpg = "gpg"
188
try:
189
output = subprocess.check_output(["gpgconf"])
190
for line in output.splitlines():
191
name, text, path = line.split(b":")
192
if name == "gpg":
193
self.gpg = path
194
break
195
except OSError as e:
196
if e.errno != errno.ENOENT:
197
raise
198
self.gnupgargs = ['--batch',
199
'--homedir', self.tempdir,
200
'--force-mdc',
201
'--quiet']
202
# Only GPG version 1 has the --no-use-agent option.
203
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
204
self.gnupgargs.append("--no-use-agent")
205
206
def __enter__(self):
207
return self
208
209
def __exit__(self, exc_type, exc_value, traceback):
210
self._cleanup()
211
return False
212
213
def __del__(self):
214
self._cleanup()
215
216
def _cleanup(self):
217
if self.tempdir is not None:
218
# Delete contents of tempdir
219
for root, dirs, files in os.walk(self.tempdir,
220
topdown=False):
221
for filename in files:
222
os.remove(os.path.join(root, filename))
223
for dirname in dirs:
224
os.rmdir(os.path.join(root, dirname))
225
# Remove tempdir
226
os.rmdir(self.tempdir)
227
self.tempdir = None
228
229
def password_encode(self, password):
230
# Passphrase can not be empty and can not contain newlines or
231
# NUL bytes. So we prefix it and hex encode it.
232
encoded = b"mandos" + binascii.hexlify(password)
233
if len(encoded) > 2048:
234
# GnuPG can't handle long passwords, so encode differently
235
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
236
.replace(b"\n", b"\\n")
237
.replace(b"\0", b"\\x00"))
238
return encoded
239
240
def encrypt(self, data, password):
241
passphrase = self.password_encode(password)
242
with tempfile.NamedTemporaryFile(
243
dir=self.tempdir) as passfile:
244
passfile.write(passphrase)
245
passfile.flush()
246
proc = subprocess.Popen([self.gpg, '--symmetric',
247
'--passphrase-file',
248
passfile.name]
249
+ self.gnupgargs,
250
stdin=subprocess.PIPE,
251
stdout=subprocess.PIPE,
252
stderr=subprocess.PIPE)
253
ciphertext, err = proc.communicate(input=data)
254
if proc.returncode != 0:
255
raise PGPError(err)
256
return ciphertext
257
258
def decrypt(self, data, password):
259
passphrase = self.password_encode(password)
260
with tempfile.NamedTemporaryFile(
261
dir=self.tempdir) as passfile:
262
passfile.write(passphrase)
263
passfile.flush()
264
proc = subprocess.Popen([self.gpg, '--decrypt',
265
'--passphrase-file',
266
passfile.name]
267
+ self.gnupgargs,
268
stdin=subprocess.PIPE,
269
stdout=subprocess.PIPE,
270
stderr=subprocess.PIPE)
271
decrypted_plaintext, err = proc.communicate(input=data)
272
if proc.returncode != 0:
273
raise PGPError(err)
274
return decrypted_plaintext
275
276
277
# Pretend that we have an Avahi module
278
class Avahi(object):
279
"""This isn't so much a class as it is a module-like namespace.
280
It is instantiated once, and simulates having an Avahi module."""
281
IF_UNSPEC = -1 # avahi-common/address.h
282
PROTO_UNSPEC = -1 # avahi-common/address.h
283
PROTO_INET = 0 # avahi-common/address.h
284
PROTO_INET6 = 1 # avahi-common/address.h
285
DBUS_NAME = "org.freedesktop.Avahi"
286
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
287
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
288
DBUS_PATH_SERVER = "/"
289
290
def string_array_to_txt_array(self, t):
291
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
for s in t), signature="ay")
293
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
294
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
295
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
296
SERVER_INVALID = 0 # avahi-common/defs.h
297
SERVER_REGISTERING = 1 # avahi-common/defs.h
298
SERVER_RUNNING = 2 # avahi-common/defs.h
299
SERVER_COLLISION = 3 # avahi-common/defs.h
300
SERVER_FAILURE = 4 # avahi-common/defs.h
301
avahi = Avahi()
302
82
SO_BINDTODEVICE = None
83
84
85
version = "1.2.3"
86
87
#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
89
syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
95
logger.addHandler(syslogger)
96
97
console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
303
102
304
103
class AvahiError(Exception):
305
104
def __init__(self, value, *args, **kwargs):
306
105
self.value = value
307
return super(AvahiError, self).__init__(value, *args,
308
**kwargs)
309
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
310
109
311
110
class AvahiServiceError(AvahiError):
312
111
pass
313
112
314
315
113
class AvahiGroupError(AvahiError):
316
114
pass
317
115
318
116
319
117
class AvahiService(object):
320
118
"""An Avahi (Zeroconf) service.
321
119
322
120
Attributes:
323
121
interface: integer; avahi.IF_UNSPEC or an interface index.
324
122
Used to optionally bind to the specified interface.
325
123
name: string; Example: 'Mandos'
326
124
type: string; Example: '_mandos._tcp'.
327
See <https://www.iana.org/assignments/service-names-port-numbers>
125
See <http://www.dns-sd.org/ServiceTypes.html>
328
126
port: integer; what port to announce
329
127
TXT: list of strings; TXT record for the service
330
128
domain: string; Domain to publish on, default to .local if empty.
336
134
server: D-Bus Server
337
135
bus: dbus.SystemBus()
338
136
"""
339
340
def __init__(self,
341
interface=avahi.IF_UNSPEC,
342
name=None,
343
servicetype=None,
344
port=None,
345
TXT=None,
346
domain="",
347
host="",
348
max_renames=32768,
349
protocol=avahi.PROTO_UNSPEC,
350
bus=None):
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
138
servicetype = None, port = None, TXT = None,
139
domain = "", host = "", max_renames = 32768,
140
protocol = avahi.PROTO_UNSPEC, bus = None):
351
141
self.interface = interface
352
142
self.name = name
353
143
self.type = servicetype
361
151
self.group = None # our entry group
362
152
self.server = None
363
153
self.bus = bus
364
self.entry_group_state_changed_match = None
365
366
def rename(self, remove=True):
154
def rename(self):
367
155
"""Derived from the Avahi example code"""
368
156
if self.rename_count >= self.max_renames:
369
157
logger.critical("No suitable Zeroconf service name found"
370
158
" after %i retries, exiting.",
371
159
self.rename_count)
372
160
raise AvahiServiceError("Too many renames")
373
self.name = str(
374
self.server.GetAlternativeServiceName(self.name))
375
self.rename_count += 1
161
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
376
162
logger.info("Changing Zeroconf service name to %r ...",
377
163
self.name)
378
if remove:
379
self.remove()
164
syslogger.setFormatter(logging.Formatter
165
('Mandos (%s) [%%(process)d]:'
166
' %%(levelname)s: %%(message)s'
167
% self.name))
168
self.remove()
380
169
try:
381
170
self.add()
382
except dbus.exceptions.DBusException as error:
383
if (error.get_dbus_name()
384
== "org.freedesktop.Avahi.CollisionError"):
385
logger.info("Local Zeroconf service name collision.")
386
return self.rename(remove=False)
387
else:
388
logger.critical("D-Bus Exception", exc_info=error)
389
self.cleanup()
390
os._exit(1)
391
171
except dbus.exceptions.DBusException, error:
172
logger.critical("DBusException: %s", error)
173
self.cleanup()
174
os._exit(1)
175
self.rename_count += 1
392
176
def remove(self):
393
177
"""Derived from the Avahi example code"""
394
if self.entry_group_state_changed_match is not None:
395
self.entry_group_state_changed_match.remove()
396
self.entry_group_state_changed_match = None
397
178
if self.group is not None:
398
179
self.group.Reset()
399
400
180
def add(self):
401
181
"""Derived from the Avahi example code"""
402
self.remove()
403
182
if self.group is None:
404
183
self.group = dbus.Interface(
405
184
self.bus.get_object(avahi.DBUS_NAME,
406
185
self.server.EntryGroupNew()),
407
186
avahi.DBUS_INTERFACE_ENTRY_GROUP)
408
self.entry_group_state_changed_match = (
409
self.group.connect_to_signal(
410
'StateChanged', self.entry_group_state_changed))
187
self.group.connect_to_signal('StateChanged',
188
self
189
.entry_group_state_changed)
411
190
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
412
191
self.name, self.type)
413
192
self.group.AddService(
419
198
dbus.UInt16(self.port),
420
199
avahi.string_array_to_txt_array(self.TXT))
421
200
self.group.Commit()
422
423
201
def entry_group_state_changed(self, state, error):
424
202
"""Derived from the Avahi example code"""
425
203
logger.debug("Avahi entry group state change: %i", state)
426
204
427
205
if state == avahi.ENTRY_GROUP_ESTABLISHED:
428
206
logger.debug("Zeroconf service established.")
429
207
elif state == avahi.ENTRY_GROUP_COLLISION:
431
209
self.rename()
432
210
elif state == avahi.ENTRY_GROUP_FAILURE:
433
211
logger.critical("Avahi: Error in group state changed %s",
434
str(error))
435
raise AvahiGroupError("State changed: {!s}".format(error))
436
212
unicode(error))
213
raise AvahiGroupError("State changed: %s"
214
% unicode(error))
437
215
def cleanup(self):
438
216
"""Derived from the Avahi example code"""
439
217
if self.group is not None:
440
try:
441
self.group.Free()
442
except (dbus.exceptions.UnknownMethodException,
443
dbus.exceptions.DBusException):
444
pass
218
self.group.Free()
445
219
self.group = None
446
self.remove()
447
448
def server_state_changed(self, state, error=None):
220
def server_state_changed(self, state):
449
221
"""Derived from the Avahi example code"""
450
222
logger.debug("Avahi server state change: %i", state)
451
bad_states = {
452
avahi.SERVER_INVALID: "Zeroconf server invalid",
453
avahi.SERVER_REGISTERING: None,
454
avahi.SERVER_COLLISION: "Zeroconf server name collision",
455
avahi.SERVER_FAILURE: "Zeroconf server failure",
456
}
457
if state in bad_states:
458
if bad_states[state] is not None:
459
if error is None:
460
logger.error(bad_states[state])
461
else:
462
logger.error(bad_states[state] + ": %r", error)
463
self.cleanup()
223
if state == avahi.SERVER_COLLISION:
224
logger.error("Zeroconf server name collision")
225
self.remove()
464
226
elif state == avahi.SERVER_RUNNING:
465
try:
466
self.add()
467
except dbus.exceptions.DBusException as error:
468
if (error.get_dbus_name()
469
== "org.freedesktop.Avahi.CollisionError"):
470
logger.info("Local Zeroconf service name"
471
" collision.")
472
return self.rename(remove=False)
473
else:
474
logger.critical("D-Bus Exception", exc_info=error)
475
self.cleanup()
476
os._exit(1)
477
else:
478
if error is None:
479
logger.debug("Unknown state: %r", state)
480
else:
481
logger.debug("Unknown state: %r: %r", state, error)
482
227
self.add()
483
228
def activate(self):
484
229
"""Derived from the Avahi example code"""
485
230
if self.server is None:
486
231
self.server = dbus.Interface(
487
232
self.bus.get_object(avahi.DBUS_NAME,
488
avahi.DBUS_PATH_SERVER,
489
follow_name_owner_changes=True),
233
avahi.DBUS_PATH_SERVER),
490
234
avahi.DBUS_INTERFACE_SERVER)
491
235
self.server.connect_to_signal("StateChanged",
492
self.server_state_changed)
236
self.server_state_changed)
493
237
self.server_state_changed(self.server.GetState())
494
238
495
239
496
class AvahiServiceToSyslog(AvahiService):
497
def rename(self, *args, **kwargs):
498
"""Add the new name to the syslog messages"""
499
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
500
syslogger.setFormatter(logging.Formatter(
501
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
502
.format(self.name)))
503
return ret
504
505
506
# Pretend that we have a GnuTLS module
507
class GnuTLS(object):
508
"""This isn't so much a class as it is a module-like namespace.
509
It is instantiated once, and simulates having a GnuTLS module."""
510
511
library = ctypes.util.find_library("gnutls")
512
if library is None:
513
library = ctypes.util.find_library("gnutls-deb0")
514
_library = ctypes.cdll.LoadLibrary(library)
515
del library
516
_need_version = b"3.3.0"
517
_tls_rawpk_version = b"3.6.6"
518
519
def __init__(self):
520
# Need to use "self" here, since this method is called before
521
# the assignment to the "gnutls" global variable happens.
522
if self.check_version(self._need_version) is None:
523
raise self.Error("Needs GnuTLS {} or later"
524
.format(self._need_version))
525
526
# Unless otherwise indicated, the constants and types below are
527
# all from the gnutls/gnutls.h C header file.
528
529
# Constants
530
E_SUCCESS = 0
531
E_INTERRUPTED = -52
532
E_AGAIN = -28
533
CRT_OPENPGP = 2
534
CRT_RAWPK = 3
535
CLIENT = 2
536
SHUT_RDWR = 0
537
CRD_CERTIFICATE = 1
538
E_NO_CERTIFICATE_FOUND = -49
539
X509_FMT_DER = 0
540
NO_TICKETS = 1<<10
541
ENABLE_RAWPK = 1<<18
542
CTYPE_PEERS = 3
543
KEYID_USE_SHA256 = 1 # gnutls/x509.h
544
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
545
546
# Types
547
class session_int(ctypes.Structure):
548
_fields_ = []
549
session_t = ctypes.POINTER(session_int)
550
551
class certificate_credentials_st(ctypes.Structure):
552
_fields_ = []
553
certificate_credentials_t = ctypes.POINTER(
554
certificate_credentials_st)
555
certificate_type_t = ctypes.c_int
556
557
class datum_t(ctypes.Structure):
558
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
559
('size', ctypes.c_uint)]
560
561
class openpgp_crt_int(ctypes.Structure):
562
_fields_ = []
563
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
564
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
565
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
566
credentials_type_t = ctypes.c_int
567
transport_ptr_t = ctypes.c_void_p
568
close_request_t = ctypes.c_int
569
570
# Exceptions
571
class Error(Exception):
572
# We need to use the class name "GnuTLS" here, since this
573
# exception might be raised from within GnuTLS.__init__,
574
# which is called before the assignment to the "gnutls"
575
# global variable has happened.
576
def __init__(self, message=None, code=None, args=()):
577
# Default usage is by a message string, but if a return
578
# code is passed, convert it to a string with
579
# gnutls.strerror()
580
self.code = code
581
if message is None and code is not None:
582
message = GnuTLS.strerror(code)
583
return super(GnuTLS.Error, self).__init__(
584
message, *args)
585
586
class CertificateSecurityError(Error):
587
pass
588
589
# Classes
590
class Credentials(object):
591
def __init__(self):
592
self._c_object = gnutls.certificate_credentials_t()
593
gnutls.certificate_allocate_credentials(
594
ctypes.byref(self._c_object))
595
self.type = gnutls.CRD_CERTIFICATE
596
597
def __del__(self):
598
gnutls.certificate_free_credentials(self._c_object)
599
600
class ClientSession(object):
601
def __init__(self, socket, credentials=None):
602
self._c_object = gnutls.session_t()
603
gnutls_flags = gnutls.CLIENT
604
if gnutls.check_version("3.5.6"):
605
gnutls_flags |= gnutls.NO_TICKETS
606
if gnutls.has_rawpk:
607
gnutls_flags |= gnutls.ENABLE_RAWPK
608
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
609
del gnutls_flags
610
gnutls.set_default_priority(self._c_object)
611
gnutls.transport_set_ptr(self._c_object, socket.fileno())
612
gnutls.handshake_set_private_extensions(self._c_object,
613
True)
614
self.socket = socket
615
if credentials is None:
616
credentials = gnutls.Credentials()
617
gnutls.credentials_set(self._c_object, credentials.type,
618
ctypes.cast(credentials._c_object,
619
ctypes.c_void_p))
620
self.credentials = credentials
621
622
def __del__(self):
623
gnutls.deinit(self._c_object)
624
625
def handshake(self):
626
return gnutls.handshake(self._c_object)
627
628
def send(self, data):
629
data = bytes(data)
630
data_len = len(data)
631
while data_len > 0:
632
data_len -= gnutls.record_send(self._c_object,
633
data[-data_len:],
634
data_len)
635
636
def bye(self):
637
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
638
639
# Error handling functions
640
def _error_code(result):
641
"""A function to raise exceptions on errors, suitable
642
for the 'restype' attribute on ctypes functions"""
643
if result >= 0:
644
return result
645
if result == gnutls.E_NO_CERTIFICATE_FOUND:
646
raise gnutls.CertificateSecurityError(code=result)
647
raise gnutls.Error(code=result)
648
649
def _retry_on_error(result, func, arguments):
650
"""A function to retry on some errors, suitable
651
for the 'errcheck' attribute on ctypes functions"""
652
while result < 0:
653
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
654
return _error_code(result)
655
result = func(*arguments)
656
return result
657
658
# Unless otherwise indicated, the function declarations below are
659
# all from the gnutls/gnutls.h C header file.
660
661
# Functions
662
priority_set_direct = _library.gnutls_priority_set_direct
663
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
664
ctypes.POINTER(ctypes.c_char_p)]
665
priority_set_direct.restype = _error_code
666
667
init = _library.gnutls_init
668
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
669
init.restype = _error_code
670
671
set_default_priority = _library.gnutls_set_default_priority
672
set_default_priority.argtypes = [session_t]
673
set_default_priority.restype = _error_code
674
675
record_send = _library.gnutls_record_send
676
record_send.argtypes = [session_t, ctypes.c_void_p,
677
ctypes.c_size_t]
678
record_send.restype = ctypes.c_ssize_t
679
record_send.errcheck = _retry_on_error
680
681
certificate_allocate_credentials = (
682
_library.gnutls_certificate_allocate_credentials)
683
certificate_allocate_credentials.argtypes = [
684
ctypes.POINTER(certificate_credentials_t)]
685
certificate_allocate_credentials.restype = _error_code
686
687
certificate_free_credentials = (
688
_library.gnutls_certificate_free_credentials)
689
certificate_free_credentials.argtypes = [
690
certificate_credentials_t]
691
certificate_free_credentials.restype = None
692
693
handshake_set_private_extensions = (
694
_library.gnutls_handshake_set_private_extensions)
695
handshake_set_private_extensions.argtypes = [session_t,
696
ctypes.c_int]
697
handshake_set_private_extensions.restype = None
698
699
credentials_set = _library.gnutls_credentials_set
700
credentials_set.argtypes = [session_t, credentials_type_t,
701
ctypes.c_void_p]
702
credentials_set.restype = _error_code
703
704
strerror = _library.gnutls_strerror
705
strerror.argtypes = [ctypes.c_int]
706
strerror.restype = ctypes.c_char_p
707
708
certificate_type_get = _library.gnutls_certificate_type_get
709
certificate_type_get.argtypes = [session_t]
710
certificate_type_get.restype = _error_code
711
712
certificate_get_peers = _library.gnutls_certificate_get_peers
713
certificate_get_peers.argtypes = [session_t,
714
ctypes.POINTER(ctypes.c_uint)]
715
certificate_get_peers.restype = ctypes.POINTER(datum_t)
716
717
global_set_log_level = _library.gnutls_global_set_log_level
718
global_set_log_level.argtypes = [ctypes.c_int]
719
global_set_log_level.restype = None
720
721
global_set_log_function = _library.gnutls_global_set_log_function
722
global_set_log_function.argtypes = [log_func]
723
global_set_log_function.restype = None
724
725
deinit = _library.gnutls_deinit
726
deinit.argtypes = [session_t]
727
deinit.restype = None
728
729
handshake = _library.gnutls_handshake
730
handshake.argtypes = [session_t]
731
handshake.restype = _error_code
732
handshake.errcheck = _retry_on_error
733
734
transport_set_ptr = _library.gnutls_transport_set_ptr
735
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
736
transport_set_ptr.restype = None
737
738
bye = _library.gnutls_bye
739
bye.argtypes = [session_t, close_request_t]
740
bye.restype = _error_code
741
bye.errcheck = _retry_on_error
742
743
check_version = _library.gnutls_check_version
744
check_version.argtypes = [ctypes.c_char_p]
745
check_version.restype = ctypes.c_char_p
746
747
has_rawpk = bool(check_version(_tls_rawpk_version))
748
749
if has_rawpk:
750
# Types
751
class pubkey_st(ctypes.Structure):
752
_fields = []
753
pubkey_t = ctypes.POINTER(pubkey_st)
754
755
x509_crt_fmt_t = ctypes.c_int
756
757
# All the function declarations below are from gnutls/abstract.h
758
pubkey_init = _library.gnutls_pubkey_init
759
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
760
pubkey_init.restype = _error_code
761
762
pubkey_import = _library.gnutls_pubkey_import
763
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
764
x509_crt_fmt_t]
765
pubkey_import.restype = _error_code
766
767
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
768
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
769
ctypes.POINTER(ctypes.c_ubyte),
770
ctypes.POINTER(ctypes.c_size_t)]
771
pubkey_get_key_id.restype = _error_code
772
773
pubkey_deinit = _library.gnutls_pubkey_deinit
774
pubkey_deinit.argtypes = [pubkey_t]
775
pubkey_deinit.restype = None
776
else:
777
# All the function declarations below are from gnutls/openpgp.h
778
779
openpgp_crt_init = _library.gnutls_openpgp_crt_init
780
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
781
openpgp_crt_init.restype = _error_code
782
783
openpgp_crt_import = _library.gnutls_openpgp_crt_import
784
openpgp_crt_import.argtypes = [openpgp_crt_t,
785
ctypes.POINTER(datum_t),
786
openpgp_crt_fmt_t]
787
openpgp_crt_import.restype = _error_code
788
789
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
790
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
791
ctypes.POINTER(ctypes.c_uint)]
792
openpgp_crt_verify_self.restype = _error_code
793
794
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
795
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
796
openpgp_crt_deinit.restype = None
797
798
openpgp_crt_get_fingerprint = (
799
_library.gnutls_openpgp_crt_get_fingerprint)
800
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
801
ctypes.c_void_p,
802
ctypes.POINTER(
803
ctypes.c_size_t)]
804
openpgp_crt_get_fingerprint.restype = _error_code
805
806
if check_version("3.6.4"):
807
certificate_type_get2 = _library.gnutls_certificate_type_get2
808
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
809
certificate_type_get2.restype = _error_code
810
811
# Remove non-public functions
812
del _error_code, _retry_on_error
813
# Create the global "gnutls" object, simulating a module
814
gnutls = GnuTLS()
815
816
817
def call_pipe(connection, # : multiprocessing.Connection
818
func, *args, **kwargs):
819
"""This function is meant to be called by multiprocessing.Process
820
821
This function runs func(*args, **kwargs), and writes the resulting
822
return value on the provided multiprocessing.Connection.
823
"""
824
connection.send(func(*args, **kwargs))
825
connection.close()
826
827
828
240
class Client(object):
829
241
"""A representation of a client host served by this server.
830
242
831
243
Attributes:
832
approved: bool(); 'None' if not yet approved/disapproved
244
_approved: bool(); 'None' if not yet approved/disapproved
833
245
approval_delay: datetime.timedelta(); Time to wait for approval
834
246
approval_duration: datetime.timedelta(); Duration of one approval
835
247
checker: subprocess.Popen(); a running checker process used
836
248
to see if the client lives.
837
249
'None' if no process is running.
838
checker_callback_tag: a GLib event source tag, or None
250
checker_callback_tag: a gobject event source tag, or None
839
251
checker_command: string; External command which is run to check
840
252
if client lives. %() expansions are done at
841
253
runtime with vars(self) as dict, so that for
842
254
instance %(name)s can be used in the command.
843
checker_initiator_tag: a GLib event source tag, or None
255
checker_initiator_tag: a gobject event source tag, or None
844
256
created: datetime.datetime(); (UTC) object creation
845
client_structure: Object describing what attributes a client has
846
and is used for storing the client at exit
847
257
current_checker_command: string; current running checker_command
848
disable_initiator_tag: a GLib event source tag, or None
258
disable_hook: If set, called by disable() as disable_hook(self)
259
disable_initiator_tag: a gobject event source tag, or None
849
260
enabled: bool()
850
261
fingerprint: string (40 or 32 hexadecimal digits); used to
851
uniquely identify an OpenPGP client
852
key_id: string (64 hexadecimal digits); used to uniquely identify
853
a client using raw public keys
262
uniquely identify the client
854
263
host: string; available for use by the checker command
855
264
interval: datetime.timedelta(); How often to start a new checker
856
265
last_approval_request: datetime.datetime(); (UTC) or None
857
266
last_checked_ok: datetime.datetime(); (UTC) or None
858
last_checker_status: integer between 0 and 255 reflecting exit
859
status of last checker. -1 reflects crashed
860
checker, -2 means no checker completed yet.
861
last_checker_signal: The signal which killed the last checker, if
862
last_checker_status is -1
863
last_enabled: datetime.datetime(); (UTC) or None
267
last_enabled: datetime.datetime(); (UTC)
864
268
name: string; from the config file, used in log messages and
865
269
D-Bus identifiers
866
270
secret: bytestring; sent verbatim (over TLS) to client
867
271
timeout: datetime.timedelta(); How long from last_checked_ok
868
272
until this client is disabled
869
extended_timeout: extra long timeout when secret has been sent
870
273
runtime_expansions: Allowed attributes for runtime expansion.
871
expires: datetime.datetime(); time (UTC) when a client will be
872
disabled, or None
873
server_settings: The server_settings dict from main()
874
274
"""
875
275
876
276
runtime_expansions = ("approval_delay", "approval_duration",
877
"created", "enabled", "expires", "key_id",
878
"fingerprint", "host", "interval",
879
"last_approval_request", "last_checked_ok",
277
"created", "enabled", "fingerprint",
278
"host", "interval", "last_checked_ok",
880
279
"last_enabled", "name", "timeout")
881
client_defaults = {
882
"timeout": "PT5M",
883
"extended_timeout": "PT15M",
884
"interval": "PT2M",
885
"checker": "fping -q -- %%(host)s",
886
"host": "",
887
"approval_delay": "PT0S",
888
"approval_duration": "PT1S",
889
"approved_by_default": "True",
890
"enabled": "True",
891
}
892
280
893
281
@staticmethod
894
def config_parser(config):
895
"""Construct a new dict of client settings of this form:
896
{ client_name: {setting_name: value, ...}, ...}
897
with exceptions for any special settings as defined above.
898
NOTE: Must be a pure function. Must return the same result
899
value given the same arguments.
900
"""
901
settings = {}
902
for client_name in config.sections():
903
section = dict(config.items(client_name))
904
client = settings[client_name] = {}
905
906
client["host"] = section["host"]
907
# Reformat values from string types to Python types
908
client["approved_by_default"] = config.getboolean(
909
client_name, "approved_by_default")
910
client["enabled"] = config.getboolean(client_name,
911
"enabled")
912
913
# Uppercase and remove spaces from key_id and fingerprint
914
# for later comparison purposes with return value from the
915
# key_id() and fingerprint() functions
916
client["key_id"] = (section.get("key_id", "").upper()
917
.replace(" ", ""))
918
client["fingerprint"] = (section["fingerprint"].upper()
919
.replace(" ", ""))
920
if "secret" in section:
921
client["secret"] = codecs.decode(section["secret"]
922
.encode("utf-8"),
923
"base64")
924
elif "secfile" in section:
925
with open(os.path.expanduser(os.path.expandvars
926
(section["secfile"])),
927
"rb") as secfile:
928
client["secret"] = secfile.read()
929
else:
930
raise TypeError("No secret or secfile for section {}"
931
.format(section))
932
client["timeout"] = string_to_delta(section["timeout"])
933
client["extended_timeout"] = string_to_delta(
934
section["extended_timeout"])
935
client["interval"] = string_to_delta(section["interval"])
936
client["approval_delay"] = string_to_delta(
937
section["approval_delay"])
938
client["approval_duration"] = string_to_delta(
939
section["approval_duration"])
940
client["checker_command"] = section["checker"]
941
client["last_approval_request"] = None
942
client["last_checked_ok"] = None
943
client["last_checker_status"] = -2
944
945
return settings
946
947
def __init__(self, settings, name=None, server_settings=None):
282
def _timedelta_to_milliseconds(td):
283
"Convert a datetime.timedelta() to milliseconds"
284
return ((td.days * 24 * 60 * 60 * 1000)
285
+ (td.seconds * 1000)
286
+ (td.microseconds // 1000))
287
288
def timeout_milliseconds(self):
289
"Return the 'timeout' attribute in milliseconds"
290
return self._timedelta_to_milliseconds(self.timeout)
291
292
def interval_milliseconds(self):
293
"Return the 'interval' attribute in milliseconds"
294
return self._timedelta_to_milliseconds(self.interval)
295
296
def approval_delay_milliseconds(self):
297
return self._timedelta_to_milliseconds(self.approval_delay)
298
299
def __init__(self, name = None, disable_hook=None, config=None):
300
"""Note: the 'checker' key in 'config' sets the
301
'checker_command' attribute and *not* the 'checker'
302
attribute."""
948
303
self.name = name
949
if server_settings is None:
950
server_settings = {}
951
self.server_settings = server_settings
952
# adding all client settings
953
for setting, value in settings.items():
954
setattr(self, setting, value)
955
956
if self.enabled:
957
if not hasattr(self, "last_enabled"):
958
self.last_enabled = datetime.datetime.utcnow()
959
if not hasattr(self, "expires"):
960
self.expires = (datetime.datetime.utcnow()
961
+ self.timeout)
962
else:
963
self.last_enabled = None
964
self.expires = None
965
304
if config is None:
305
config = {}
966
306
logger.debug("Creating client %r", self.name)
967
logger.debug(" Key ID: %s", self.key_id)
307
# Uppercase and remove spaces from fingerprint for later
308
# comparison purposes with return value from the fingerprint()
309
# function
310
self.fingerprint = (config["fingerprint"].upper()
311
.replace(" ", ""))
968
312
logger.debug(" Fingerprint: %s", self.fingerprint)
969
self.created = settings.get("created",
970
datetime.datetime.utcnow())
971
972
# attributes specific for this server instance
313
if "secret" in config:
314
self.secret = config["secret"].decode("base64")
315
elif "secfile" in config:
316
with open(os.path.expanduser(os.path.expandvars
317
(config["secfile"])),
318
"rb") as secfile:
319
self.secret = secfile.read()
320
else:
321
raise TypeError("No secret or secfile for client %s"
322
% self.name)
323
self.host = config.get("host", "")
324
self.created = datetime.datetime.utcnow()
325
self.enabled = False
326
self.last_approval_request = None
327
self.last_enabled = None
328
self.last_checked_ok = None
329
self.timeout = string_to_delta(config["timeout"])
330
self.interval = string_to_delta(config["interval"])
331
self.disable_hook = disable_hook
973
332
self.checker = None
974
333
self.checker_initiator_tag = None
975
334
self.disable_initiator_tag = None
976
335
self.checker_callback_tag = None
336
self.checker_command = config["checker"]
977
337
self.current_checker_command = None
978
self.approved = None
338
self.last_connect = None
339
self._approved = None
340
self.approved_by_default = config.get("approved_by_default",
341
True)
979
342
self.approvals_pending = 0
980
self.changedstate = multiprocessing_manager.Condition(
981
multiprocessing_manager.Lock())
982
self.client_structure = [attr
983
for attr in self.__dict__.keys()
984
if not attr.startswith("_")]
985
self.client_structure.append("client_structure")
986
987
for name, t in inspect.getmembers(
988
type(self), lambda obj: isinstance(obj, property)):
989
if not name.startswith("_"):
990
self.client_structure.append(name)
991
992
# Send notice to process children that client state has changed
343
self.approval_delay = string_to_delta(
344
config["approval_delay"])
345
self.approval_duration = string_to_delta(
346
config["approval_duration"])
347
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
348
993
349
def send_changedstate(self):
994
with self.changedstate:
995
self.changedstate.notify_all()
996
350
self.changedstate.acquire()
351
self.changedstate.notify_all()
352
self.changedstate.release()
353
997
354
def enable(self):
998
355
"""Start this client's checker and timeout hooks"""
999
356
if getattr(self, "enabled", False):
1000
357
# Already enabled
1001
358
return
1002
self.expires = datetime.datetime.utcnow() + self.timeout
1003
self.enabled = True
359
self.send_changedstate()
1004
360
self.last_enabled = datetime.datetime.utcnow()
1005
self.init_checker()
1006
self.send_changedstate()
1007
361
# Schedule a new checker to be started an 'interval' from now,
362
# and every interval from then on.
363
self.checker_initiator_tag = (gobject.timeout_add
364
(self.interval_milliseconds(),
365
self.start_checker))
366
# Schedule a disable() when 'timeout' has passed
367
self.disable_initiator_tag = (gobject.timeout_add
368
(self.timeout_milliseconds(),
369
self.disable))
370
self.enabled = True
371
# Also start a new checker *right now*.
372
self.start_checker()
373
1008
374
def disable(self, quiet=True):
1009
375
"""Disable this client."""
1010
376
if not getattr(self, "enabled", False):
1011
377
return False
1012
378
if not quiet:
379
self.send_changedstate()
380
if not quiet:
1013
381
logger.info("Disabling client %s", self.name)
1014
if getattr(self, "disable_initiator_tag", None) is not None:
1015
GLib.source_remove(self.disable_initiator_tag)
382
if getattr(self, "disable_initiator_tag", False):
383
gobject.source_remove(self.disable_initiator_tag)
1016
384
self.disable_initiator_tag = None
1017
self.expires = None
1018
if getattr(self, "checker_initiator_tag", None) is not None:
1019
GLib.source_remove(self.checker_initiator_tag)
385
if getattr(self, "checker_initiator_tag", False):
386
gobject.source_remove(self.checker_initiator_tag)
1020
387
self.checker_initiator_tag = None
1021
388
self.stop_checker()
389
if self.disable_hook:
390
self.disable_hook(self)
1022
391
self.enabled = False
1023
if not quiet:
1024
self.send_changedstate()
1025
# Do not run this again if called by a GLib.timeout_add
392
# Do not run this again if called by a gobject.timeout_add
1026
393
return False
1027
394
1028
395
def __del__(self):
396
self.disable_hook = None
1029
397
self.disable()
1030
1031
def init_checker(self):
1032
# Schedule a new checker to be started an 'interval' from now,
1033
# and every interval from then on.
1034
if self.checker_initiator_tag is not None:
1035
GLib.source_remove(self.checker_initiator_tag)
1036
self.checker_initiator_tag = GLib.timeout_add(
1037
int(self.interval.total_seconds() * 1000),
1038
self.start_checker)
1039
# Schedule a disable() when 'timeout' has passed
1040
if self.disable_initiator_tag is not None:
1041
GLib.source_remove(self.disable_initiator_tag)
1042
self.disable_initiator_tag = GLib.timeout_add(
1043
int(self.timeout.total_seconds() * 1000), self.disable)
1044
# Also start a new checker *right now*.
1045
self.start_checker()
1046
1047
def checker_callback(self, source, condition, connection,
1048
command):
398
399
def checker_callback(self, pid, condition, command):
1049
400
"""The checker has completed, so take appropriate actions."""
1050
401
self.checker_callback_tag = None
1051
402
self.checker = None
1052
# Read return code from connection (see call_pipe)
1053
returncode = connection.recv()
1054
connection.close()
1055
1056
if returncode >= 0:
1057
self.last_checker_status = returncode
1058
self.last_checker_signal = None
1059
if self.last_checker_status == 0:
403
if os.WIFEXITED(condition):
404
exitstatus = os.WEXITSTATUS(condition)
405
if exitstatus == 0:
1060
406
logger.info("Checker for %(name)s succeeded",
1061
407
vars(self))
1062
408
self.checked_ok()
1063
409
else:
1064
logger.info("Checker for %(name)s failed", vars(self))
410
logger.info("Checker for %(name)s failed",
411
vars(self))
1065
412
else:
1066
self.last_checker_status = -1
1067
self.last_checker_signal = -returncode
1068
413
logger.warning("Checker for %(name)s crashed?",
1069
414
vars(self))
1070
return False
1071
415
1072
416
def checked_ok(self):
1073
"""Assert that the client has been seen, alive and well."""
417
"""Bump up the timeout for this client.
418
419
This should only be called when the client has been seen,
420
alive and well.
421
"""
1074
422
self.last_checked_ok = datetime.datetime.utcnow()
1075
self.last_checker_status = 0
1076
self.last_checker_signal = None
1077
self.bump_timeout()
1078
1079
def bump_timeout(self, timeout=None):
1080
"""Bump up the timeout for this client."""
1081
if timeout is None:
1082
timeout = self.timeout
1083
if self.disable_initiator_tag is not None:
1084
GLib.source_remove(self.disable_initiator_tag)
1085
self.disable_initiator_tag = None
1086
if getattr(self, "enabled", False):
1087
self.disable_initiator_tag = GLib.timeout_add(
1088
int(timeout.total_seconds() * 1000), self.disable)
1089
self.expires = datetime.datetime.utcnow() + timeout
1090
423
gobject.source_remove(self.disable_initiator_tag)
424
self.disable_initiator_tag = (gobject.timeout_add
425
(self.timeout_milliseconds(),
426
self.disable))
427
1091
428
def need_approval(self):
1092
429
self.last_approval_request = datetime.datetime.utcnow()
1093
430
1094
431
def start_checker(self):
1095
432
"""Start a new checker subprocess if one is not running.
1096
433
1097
434
If a checker already exists, leave it running and do
1098
435
nothing."""
1099
436
# The reason for not killing a running checker is that if we
1100
# did that, and if a checker (for some reason) started running
1101
# slowly and taking more than 'interval' time, then the client
1102
# would inevitably timeout, since no checker would get a
1103
# chance to run to completion. If we instead leave running
437
# did that, then if a checker (for some reason) started
438
# running slowly and taking more than 'interval' time, the
439
# client would inevitably timeout, since no checker would get
440
# a chance to run to completion. If we instead leave running
1104
441
# checkers alone, the checker would have to take more time
1105
442
# than 'timeout' for the client to be disabled, which is as it
1106
443
# should be.
1107
1108
if self.checker is not None and not self.checker.is_alive():
1109
logger.warning("Checker was not alive; joining")
1110
self.checker.join()
1111
self.checker = None
444
445
# If a checker exists, make sure it is not a zombie
446
try:
447
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
448
except (AttributeError, OSError), error:
449
if (isinstance(error, OSError)
450
and error.errno != errno.ECHILD):
451
raise error
452
else:
453
if pid:
454
logger.warning("Checker was a zombie")
455
gobject.source_remove(self.checker_callback_tag)
456
self.checker_callback(pid, status,
457
self.current_checker_command)
1112
458
# Start a new checker if needed
1113
459
if self.checker is None:
1114
# Escape attributes for the shell
1115
escaped_attrs = {
1116
attr: re.escape(str(getattr(self, attr)))
1117
for attr in self.runtime_expansions}
1118
460
try:
1119
command = self.checker_command % escaped_attrs
1120
except TypeError as error:
1121
logger.error('Could not format string "%s"',
1122
self.checker_command,
1123
exc_info=error)
1124
return True # Try again later
461
# In case checker_command has exactly one % operator
462
command = self.checker_command % self.host
463
except TypeError:
464
# Escape attributes for the shell
465
escaped_attrs = dict(
466
(attr,
467
re.escape(unicode(str(getattr(self, attr, "")),
468
errors=
469
'replace')))
470
for attr in
471
self.runtime_expansions)
472
473
try:
474
command = self.checker_command % escaped_attrs
475
except TypeError, error:
476
logger.error('Could not format string "%s":'
477
' %s', self.checker_command, error)
478
return True # Try again later
1125
479
self.current_checker_command = command
1126
logger.info("Starting checker %r for %s", command,
1127
self.name)
1128
# We don't need to redirect stdout and stderr, since
1129
# in normal mode, that is already done by daemon(),
1130
# and in debug mode we don't want to. (Stdin is
1131
# always replaced by /dev/null.)
1132
# The exception is when not debugging but nevertheless
1133
# running in the foreground; use the previously
1134
# created wnull.
1135
popen_args = {"close_fds": True,
1136
"shell": True,
1137
"cwd": "/"}
1138
if (not self.server_settings["debug"]
1139
and self.server_settings["foreground"]):
1140
popen_args.update({"stdout": wnull,
1141
"stderr": wnull})
1142
pipe = multiprocessing.Pipe(duplex=False)
1143
self.checker = multiprocessing.Process(
1144
target=call_pipe,
1145
args=(pipe[1], subprocess.call, command),
1146
kwargs=popen_args)
1147
self.checker.start()
1148
self.checker_callback_tag = GLib.io_add_watch(
1149
pipe[0].fileno(), GLib.IO_IN,
1150
self.checker_callback, pipe[0], command)
1151
# Re-run this periodically if run by GLib.timeout_add
480
try:
481
logger.info("Starting checker %r for %s",
482
command, self.name)
483
# We don't need to redirect stdout and stderr, since
484
# in normal mode, that is already done by daemon(),
485
# and in debug mode we don't want to. (Stdin is
486
# always replaced by /dev/null.)
487
self.checker = subprocess.Popen(command,
488
close_fds=True,
489
shell=True, cwd="/")
490
self.checker_callback_tag = (gobject.child_watch_add
491
(self.checker.pid,
492
self.checker_callback,
493
data=command))
494
# The checker may have completed before the gobject
495
# watch was added. Check for this.
496
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
497
if pid:
498
gobject.source_remove(self.checker_callback_tag)
499
self.checker_callback(pid, status, command)
500
except OSError, error:
501
logger.error("Failed to start subprocess: %s",
502
error)
503
# Re-run this periodically if run by gobject.timeout_add
1152
504
return True
1153
505
1154
506
def stop_checker(self):
1155
507
"""Force the checker process, if any, to stop."""
1156
508
if self.checker_callback_tag:
1157
GLib.source_remove(self.checker_callback_tag)
509
gobject.source_remove(self.checker_callback_tag)
1158
510
self.checker_callback_tag = None
1159
511
if getattr(self, "checker", None) is None:
1160
512
return
1161
513
logger.debug("Stopping checker for %(name)s", vars(self))
1162
self.checker.terminate()
514
try:
515
os.kill(self.checker.pid, signal.SIGTERM)
516
#time.sleep(0.5)
517
#if self.checker.poll() is None:
518
# os.kill(self.checker.pid, signal.SIGKILL)
519
except OSError, error:
520
if error.errno != errno.ESRCH: # No such process
521
raise
1163
522
self.checker = None
1164
523
1165
1166
def dbus_service_property(dbus_interface,
1167
signature="v",
1168
access="readwrite",
1169
byte_arrays=False):
524
def dbus_service_property(dbus_interface, signature="v",
525
access="readwrite", byte_arrays=False):
1170
526
"""Decorators for marking methods of a DBusObjectWithProperties to
1171
527
become properties on the D-Bus.
1172
528
1173
529
The decorated method will be called with no arguments by "Get"
1174
530
and with one argument by "Set".
1175
531
1176
532
The parameters, where they are supported, are the same as
1177
533
dbus.service.method, except there is only "signature", since the
1178
534
type from Get() and the type sent to Set() is the same.
1181
537
# "Set" method, so we fail early here:
1182
538
if byte_arrays and signature != "ay":
1183
539
raise ValueError("Byte arrays not supported for non-'ay'"
1184
" signature {!r}".format(signature))
1185
540
" signature %r" % signature)
1186
541
def decorator(func):
1187
542
func._dbus_is_property = True
1188
543
func._dbus_interface = dbus_interface
1191
546
func._dbus_name = func.__name__
1192
547
if func._dbus_name.endswith("_dbus_property"):
1193
548
func._dbus_name = func._dbus_name[:-14]
1194
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1195
return func
1196
1197
return decorator
1198
1199
1200
def dbus_interface_annotations(dbus_interface):
1201
"""Decorator for marking functions returning interface annotations
1202
1203
Usage:
1204
1205
@dbus_interface_annotations("org.example.Interface")
1206
def _foo(self): # Function name does not matter
1207
return {"org.freedesktop.DBus.Deprecated": "true",
1208
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1209
"false"}
1210
"""
1211
1212
def decorator(func):
1213
func._dbus_is_interface = True
1214
func._dbus_interface = dbus_interface
1215
func._dbus_name = dbus_interface
1216
return func
1217
1218
return decorator
1219
1220
1221
def dbus_annotations(annotations):
1222
"""Decorator to annotate D-Bus methods, signals or properties
1223
Usage:
1224
1225
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1226
"org.freedesktop.DBus.Property."
1227
"EmitsChangedSignal": "false"})
1228
@dbus_service_property("org.example.Interface", signature="b",
1229
access="r")
1230
def Property_dbus_property(self):
1231
return dbus.Boolean(False)
1232
1233
See also the DBusObjectWithAnnotations class.
1234
"""
1235
1236
def decorator(func):
1237
func._dbus_annotations = annotations
1238
return func
1239
549
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
550
return func
1240
551
return decorator
1241
552
1242
553
1243
554
class DBusPropertyException(dbus.exceptions.DBusException):
1244
555
"""A base class for D-Bus property-related exceptions
1245
556
"""
1246
pass
557
def __unicode__(self):
558
return unicode(str(self))
1247
559
1248
560
1249
561
class DBusPropertyAccessException(DBusPropertyException):
1258
570
pass
1259
571
1260
572
1261
class DBusObjectWithAnnotations(dbus.service.Object):
1262
"""A D-Bus object with annotations.
1263
1264
Classes inheriting from this can use the dbus_annotations
1265
decorator to add annotations to methods or signals.
1266
"""
1267
1268
@staticmethod
1269
def _is_dbus_thing(thing):
1270
"""Returns a function testing if an attribute is a D-Bus thing
1271
1272
If called like _is_dbus_thing("method") it returns a function
1273
suitable for use as predicate to inspect.getmembers().
1274
"""
1275
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1276
False)
1277
1278
def _get_all_dbus_things(self, thing):
1279
"""Returns a generator of (name, attribute) pairs
1280
"""
1281
return ((getattr(athing.__get__(self), "_dbus_name", name),
1282
athing.__get__(self))
1283
for cls in self.__class__.__mro__
1284
for name, athing in
1285
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1286
1287
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1288
out_signature="s",
1289
path_keyword='object_path',
1290
connection_keyword='connection')
1291
def Introspect(self, object_path, connection):
1292
"""Overloading of standard D-Bus method.
1293
1294
Inserts annotation tags on methods and signals.
1295
"""
1296
xmlstring = dbus.service.Object.Introspect(self, object_path,
1297
connection)
1298
try:
1299
document = xml.dom.minidom.parseString(xmlstring)
1300
1301
for if_tag in document.getElementsByTagName("interface"):
1302
# Add annotation tags
1303
for typ in ("method", "signal"):
1304
for tag in if_tag.getElementsByTagName(typ):
1305
annots = dict()
1306
for name, prop in (self.
1307
_get_all_dbus_things(typ)):
1308
if (name == tag.getAttribute("name")
1309
and prop._dbus_interface
1310
== if_tag.getAttribute("name")):
1311
annots.update(getattr(
1312
prop, "_dbus_annotations", {}))
1313
for name, value in annots.items():
1314
ann_tag = document.createElement(
1315
"annotation")
1316
ann_tag.setAttribute("name", name)
1317
ann_tag.setAttribute("value", value)
1318
tag.appendChild(ann_tag)
1319
# Add interface annotation tags
1320
for annotation, value in dict(
1321
itertools.chain.from_iterable(
1322
annotations().items()
1323
for name, annotations
1324
in self._get_all_dbus_things("interface")
1325
if name == if_tag.getAttribute("name")
1326
)).items():
1327
ann_tag = document.createElement("annotation")
1328
ann_tag.setAttribute("name", annotation)
1329
ann_tag.setAttribute("value", value)
1330
if_tag.appendChild(ann_tag)
1331
# Fix argument name for the Introspect method itself
1332
if (if_tag.getAttribute("name")
1333
== dbus.INTROSPECTABLE_IFACE):
1334
for cn in if_tag.getElementsByTagName("method"):
1335
if cn.getAttribute("name") == "Introspect":
1336
for arg in cn.getElementsByTagName("arg"):
1337
if (arg.getAttribute("direction")
1338
== "out"):
1339
arg.setAttribute("name",
1340
"xml_data")
1341
xmlstring = document.toxml("utf-8")
1342
document.unlink()
1343
except (AttributeError, xml.dom.DOMException,
1344
xml.parsers.expat.ExpatError) as error:
1345
logger.error("Failed to override Introspection method",
1346
exc_info=error)
1347
return xmlstring
1348
1349
1350
class DBusObjectWithProperties(DBusObjectWithAnnotations):
573
class DBusObjectWithProperties(dbus.service.Object):
1351
574
"""A D-Bus object with properties.
1352
575
1353
576
Classes inheriting from this can use the dbus_service_property
1354
577
decorator to expose methods as D-Bus properties. It exposes the
1355
578
standard Get(), Set(), and GetAll() methods on the D-Bus.
1356
579
"""
1357
580
581
@staticmethod
582
def _is_dbus_property(obj):
583
return getattr(obj, "_dbus_is_property", False)
584
585
def _get_all_dbus_properties(self):
586
"""Returns a generator of (name, attribute) pairs
587
"""
588
return ((prop._dbus_name, prop)
589
for name, prop in
590
inspect.getmembers(self, self._is_dbus_property))
591
1358
592
def _get_dbus_property(self, interface_name, property_name):
1359
593
"""Returns a bound method if one exists which is a D-Bus
1360
594
property with the specified name and interface.
1361
595
"""
1362
for cls in self.__class__.__mro__:
1363
for name, value in inspect.getmembers(
1364
cls, self._is_dbus_thing("property")):
1365
if (value._dbus_name == property_name
1366
and value._dbus_interface == interface_name):
1367
return value.__get__(self)
1368
596
for name in (property_name,
597
property_name + "_dbus_property"):
598
prop = getattr(self, name, None)
599
if (prop is None
600
or not self._is_dbus_property(prop)
601
or prop._dbus_name != property_name
602
or (interface_name and prop._dbus_interface
603
and interface_name != prop._dbus_interface)):
604
continue
605
return prop
1369
606
# No such property
1370
raise DBusPropertyNotFound("{}:{}.{}".format(
1371
self.dbus_object_path, interface_name, property_name))
1372
1373
@classmethod
1374
def _get_all_interface_names(cls):
1375
"""Get a sequence of all interfaces supported by an object"""
1376
return (name for name in set(getattr(getattr(x, attr),
1377
"_dbus_interface", None)
1378
for x in (inspect.getmro(cls))
1379
for attr in dir(x))
1380
if name is not None)
1381
1382
@dbus.service.method(dbus.PROPERTIES_IFACE,
1383
in_signature="ss",
607
raise DBusPropertyNotFound(self.dbus_object_path + ":"
608
+ interface_name + "."
609
+ property_name)
610
611
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1384
612
out_signature="v")
1385
613
def Get(self, interface_name, property_name):
1386
614
"""Standard D-Bus property Get() method, see D-Bus standard.
1392
620
if not hasattr(value, "variant_level"):
1393
621
return value
1394
622
return type(value)(value, variant_level=value.variant_level+1)
1395
623
1396
624
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1397
625
def Set(self, interface_name, property_name, value):
1398
626
"""Standard D-Bus property Set() method, see D-Bus standard.
1404
632
# The byte_arrays option is not supported yet on
1405
633
# signatures other than "ay".
1406
634
if prop._dbus_signature != "ay":
1407
raise ValueError("Byte arrays not supported for non-"
1408
"'ay' signature {!r}"
1409
.format(prop._dbus_signature))
1410
value = dbus.ByteArray(b''.join(chr(byte)
1411
for byte in value))
635
raise ValueError
636
value = dbus.ByteArray(''.join(unichr(byte)
637
for byte in value))
1412
638
prop(value)
1413
1414
@dbus.service.method(dbus.PROPERTIES_IFACE,
1415
in_signature="s",
639
640
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1416
641
out_signature="a{sv}")
1417
642
def GetAll(self, interface_name):
1418
643
"""Standard D-Bus property GetAll() method, see D-Bus
1420
645
1421
646
Note: Will not include properties with access="write".
1422
647
"""
1423
properties = {}
1424
for name, prop in self._get_all_dbus_things("property"):
648
all = {}
649
for name, prop in self._get_all_dbus_properties():
1425
650
if (interface_name
1426
651
and interface_name != prop._dbus_interface):
1427
652
# Interface non-empty but did not match
1431
656
continue
1432
657
value = prop()
1433
658
if not hasattr(value, "variant_level"):
1434
properties[name] = value
659
all[name] = value
1435
660
continue
1436
properties[name] = type(value)(
1437
value, variant_level=value.variant_level + 1)
1438
return dbus.Dictionary(properties, signature="sv")
1439
1440
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1441
def PropertiesChanged(self, interface_name, changed_properties,
1442
invalidated_properties):
1443
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1444
standard.
1445
"""
1446
pass
1447
661
all[name] = type(value)(value, variant_level=
662
value.variant_level+1)
663
return dbus.Dictionary(all, signature="sv")
664
1448
665
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1449
666
out_signature="s",
1450
667
path_keyword='object_path',
1451
668
connection_keyword='connection')
1452
669
def Introspect(self, object_path, connection):
1453
"""Overloading of standard D-Bus method.
1454
1455
Inserts property tags and interface annotation tags.
670
"""Standard D-Bus method, overloaded to insert property tags.
1456
671
"""
1457
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1458
object_path,
1459
connection)
672
xmlstring = dbus.service.Object.Introspect(self, object_path,
673
connection)
1460
674
try:
1461
675
document = xml.dom.minidom.parseString(xmlstring)
1462
1463
676
def make_tag(document, name, prop):
1464
677
e = document.createElement("property")
1465
678
e.setAttribute("name", name)
1466
679
e.setAttribute("type", prop._dbus_signature)
1467
680
e.setAttribute("access", prop._dbus_access)
1468
681
return e
1469
1470
682
for if_tag in document.getElementsByTagName("interface"):
1471
# Add property tags
1472
683
for tag in (make_tag(document, name, prop)
1473
684
for name, prop
1474
in self._get_all_dbus_things("property")
685
in self._get_all_dbus_properties()
1475
686
if prop._dbus_interface
1476
687
== if_tag.getAttribute("name")):
1477
688
if_tag.appendChild(tag)
1478
# Add annotation tags for properties
1479
for tag in if_tag.getElementsByTagName("property"):
1480
annots = dict()
1481
for name, prop in self._get_all_dbus_things(
1482
"property"):
1483
if (name == tag.getAttribute("name")
1484
and prop._dbus_interface
1485
== if_tag.getAttribute("name")):
1486
annots.update(getattr(
1487
prop, "_dbus_annotations", {}))
1488
for name, value in annots.items():
1489
ann_tag = document.createElement(
1490
"annotation")
1491
ann_tag.setAttribute("name", name)
1492
ann_tag.setAttribute("value", value)
1493
tag.appendChild(ann_tag)
1494
689
# Add the names to the return values for the
1495
690
# "org.freedesktop.DBus.Properties" methods
1496
691
if (if_tag.getAttribute("name")
1509
704
xmlstring = document.toxml("utf-8")
1510
705
document.unlink()
1511
706
except (AttributeError, xml.dom.DOMException,
1512
xml.parsers.expat.ExpatError) as error:
1513
logger.error("Failed to override Introspection method",
1514
exc_info=error)
1515
return xmlstring
1516
1517
1518
try:
1519
dbus.OBJECT_MANAGER_IFACE
1520
except AttributeError:
1521
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1522
1523
1524
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1525
"""A D-Bus object with an ObjectManager.
1526
1527
Classes inheriting from this exposes the standard
1528
GetManagedObjects call and the InterfacesAdded and
1529
InterfacesRemoved signals on the standard
1530
"org.freedesktop.DBus.ObjectManager" interface.
1531
1532
Note: No signals are sent automatically; they must be sent
1533
manually.
1534
"""
1535
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1536
out_signature="a{oa{sa{sv}}}")
1537
def GetManagedObjects(self):
1538
"""This function must be overridden"""
1539
raise NotImplementedError()
1540
1541
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1542
signature="oa{sa{sv}}")
1543
def InterfacesAdded(self, object_path, interfaces_and_properties):
1544
pass
1545
1546
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1547
def InterfacesRemoved(self, object_path, interfaces):
1548
pass
1549
1550
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1551
out_signature="s",
1552
path_keyword='object_path',
1553
connection_keyword='connection')
1554
def Introspect(self, object_path, connection):
1555
"""Overloading of standard D-Bus method.
1556
1557
Override return argument name of GetManagedObjects to be
1558
"objpath_interfaces_and_properties"
1559
"""
1560
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1561
object_path,
1562
connection)
1563
try:
1564
document = xml.dom.minidom.parseString(xmlstring)
1565
1566
for if_tag in document.getElementsByTagName("interface"):
1567
# Fix argument name for the GetManagedObjects method
1568
if (if_tag.getAttribute("name")
1569
== dbus.OBJECT_MANAGER_IFACE):
1570
for cn in if_tag.getElementsByTagName("method"):
1571
if (cn.getAttribute("name")
1572
== "GetManagedObjects"):
1573
for arg in cn.getElementsByTagName("arg"):
1574
if (arg.getAttribute("direction")
1575
== "out"):
1576
arg.setAttribute(
1577
"name",
1578
"objpath_interfaces"
1579
"_and_properties")
1580
xmlstring = document.toxml("utf-8")
1581
document.unlink()
1582
except (AttributeError, xml.dom.DOMException,
1583
xml.parsers.expat.ExpatError) as error:
1584
logger.error("Failed to override Introspection method",
1585
exc_info=error)
1586
return xmlstring
1587
1588
1589
def datetime_to_dbus(dt, variant_level=0):
1590
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1591
if dt is None:
1592
return dbus.String("", variant_level=variant_level)
1593
return dbus.String(dt.isoformat(), variant_level=variant_level)
1594
1595
1596
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1597
"""A class decorator; applied to a subclass of
1598
dbus.service.Object, it will add alternate D-Bus attributes with
1599
interface names according to the "alt_interface_names" mapping.
1600
Usage:
1601
1602
@alternate_dbus_interfaces({"org.example.Interface":
1603
"net.example.AlternateInterface"})
1604
class SampleDBusObject(dbus.service.Object):
1605
@dbus.service.method("org.example.Interface")
1606
def SampleDBusMethod():
1607
pass
1608
1609
The above "SampleDBusMethod" on "SampleDBusObject" will be
1610
reachable via two interfaces: "org.example.Interface" and
1611
"net.example.AlternateInterface", the latter of which will have
1612
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1613
"true", unless "deprecate" is passed with a False value.
1614
1615
This works for methods and signals, and also for D-Bus properties
1616
(from DBusObjectWithProperties) and interfaces (from the
1617
dbus_interface_annotations decorator).
1618
"""
1619
1620
def wrapper(cls):
1621
for orig_interface_name, alt_interface_name in (
1622
alt_interface_names.items()):
1623
attr = {}
1624
interface_names = set()
1625
# Go though all attributes of the class
1626
for attrname, attribute in inspect.getmembers(cls):
1627
# Ignore non-D-Bus attributes, and D-Bus attributes
1628
# with the wrong interface name
1629
if (not hasattr(attribute, "_dbus_interface")
1630
or not attribute._dbus_interface.startswith(
1631
orig_interface_name)):
1632
continue
1633
# Create an alternate D-Bus interface name based on
1634
# the current name
1635
alt_interface = attribute._dbus_interface.replace(
1636
orig_interface_name, alt_interface_name)
1637
interface_names.add(alt_interface)
1638
# Is this a D-Bus signal?
1639
if getattr(attribute, "_dbus_is_signal", False):
1640
# Extract the original non-method undecorated
1641
# function by black magic
1642
if sys.version_info.major == 2:
1643
nonmethod_func = (dict(
1644
zip(attribute.func_code.co_freevars,
1645
attribute.__closure__))
1646
["func"].cell_contents)
1647
else:
1648
nonmethod_func = (dict(
1649
zip(attribute.__code__.co_freevars,
1650
attribute.__closure__))
1651
["func"].cell_contents)
1652
# Create a new, but exactly alike, function
1653
# object, and decorate it to be a new D-Bus signal
1654
# with the alternate D-Bus interface name
1655
new_function = copy_function(nonmethod_func)
1656
new_function = (dbus.service.signal(
1657
alt_interface,
1658
attribute._dbus_signature)(new_function))
1659
# Copy annotations, if any
1660
try:
1661
new_function._dbus_annotations = dict(
1662
attribute._dbus_annotations)
1663
except AttributeError:
1664
pass
1665
1666
# Define a creator of a function to call both the
1667
# original and alternate functions, so both the
1668
# original and alternate signals gets sent when
1669
# the function is called
1670
def fixscope(func1, func2):
1671
"""This function is a scope container to pass
1672
func1 and func2 to the "call_both" function
1673
outside of its arguments"""
1674
1675
@functools.wraps(func2)
1676
def call_both(*args, **kwargs):
1677
"""This function will emit two D-Bus
1678
signals by calling func1 and func2"""
1679
func1(*args, **kwargs)
1680
func2(*args, **kwargs)
1681
# Make wrapper function look like a D-Bus
1682
# signal
1683
for name, attr in inspect.getmembers(func2):
1684
if name.startswith("_dbus_"):
1685
setattr(call_both, name, attr)
1686
1687
return call_both
1688
# Create the "call_both" function and add it to
1689
# the class
1690
attr[attrname] = fixscope(attribute, new_function)
1691
# Is this a D-Bus method?
1692
elif getattr(attribute, "_dbus_is_method", False):
1693
# Create a new, but exactly alike, function
1694
# object. Decorate it to be a new D-Bus method
1695
# with the alternate D-Bus interface name. Add it
1696
# to the class.
1697
attr[attrname] = (
1698
dbus.service.method(
1699
alt_interface,
1700
attribute._dbus_in_signature,
1701
attribute._dbus_out_signature)
1702
(copy_function(attribute)))
1703
# Copy annotations, if any
1704
try:
1705
attr[attrname]._dbus_annotations = dict(
1706
attribute._dbus_annotations)
1707
except AttributeError:
1708
pass
1709
# Is this a D-Bus property?
1710
elif getattr(attribute, "_dbus_is_property", False):
1711
# Create a new, but exactly alike, function
1712
# object, and decorate it to be a new D-Bus
1713
# property with the alternate D-Bus interface
1714
# name. Add it to the class.
1715
attr[attrname] = (dbus_service_property(
1716
alt_interface, attribute._dbus_signature,
1717
attribute._dbus_access,
1718
attribute._dbus_get_args_options
1719
["byte_arrays"])
1720
(copy_function(attribute)))
1721
# Copy annotations, if any
1722
try:
1723
attr[attrname]._dbus_annotations = dict(
1724
attribute._dbus_annotations)
1725
except AttributeError:
1726
pass
1727
# Is this a D-Bus interface?
1728
elif getattr(attribute, "_dbus_is_interface", False):
1729
# Create a new, but exactly alike, function
1730
# object. Decorate it to be a new D-Bus interface
1731
# with the alternate D-Bus interface name. Add it
1732
# to the class.
1733
attr[attrname] = (
1734
dbus_interface_annotations(alt_interface)
1735
(copy_function(attribute)))
1736
if deprecate:
1737
# Deprecate all alternate interfaces
1738
iname = "_AlternateDBusNames_interface_annotation{}"
1739
for interface_name in interface_names:
1740
1741
@dbus_interface_annotations(interface_name)
1742
def func(self):
1743
return {"org.freedesktop.DBus.Deprecated":
1744
"true"}
1745
# Find an unused name
1746
for aname in (iname.format(i)
1747
for i in itertools.count()):
1748
if aname not in attr:
1749
attr[aname] = func
1750
break
1751
if interface_names:
1752
# Replace the class with a new subclass of it with
1753
# methods, signals, etc. as created above.
1754
if sys.version_info.major == 2:
1755
cls = type(b"{}Alternate".format(cls.__name__),
1756
(cls, ), attr)
1757
else:
1758
cls = type("{}Alternate".format(cls.__name__),
1759
(cls, ), attr)
1760
return cls
1761
1762
return wrapper
1763
1764
1765
@alternate_dbus_interfaces({"se.recompile.Mandos":
1766
"se.bsnet.fukt.Mandos"})
707
xml.parsers.expat.ExpatError), error:
708
logger.error("Failed to override Introspection method",
709
error)
710
return xmlstring
711
712
1767
713
class ClientDBus(Client, DBusObjectWithProperties):
1768
714
"""A Client class using D-Bus
1769
715
1770
716
Attributes:
1771
717
dbus_object_path: dbus.ObjectPath
1772
718
bus: dbus.SystemBus()
1773
719
"""
1774
720
1775
721
runtime_expansions = (Client.runtime_expansions
1776
+ ("dbus_object_path", ))
1777
1778
_interface = "se.recompile.Mandos.Client"
1779
722
+ ("dbus_object_path",))
723
1780
724
# dbus.service.Object doesn't use super(), so we can't either.
1781
1782
def __init__(self, bus=None, *args, **kwargs):
725
726
def __init__(self, bus = None, *args, **kwargs):
727
self._approvals_pending = 0
1783
728
self.bus = bus
1784
729
Client.__init__(self, *args, **kwargs)
1785
730
# Only now, when this client is initialized, can it show up on
1786
731
# the D-Bus
1787
client_object_name = str(self.name).translate(
732
client_object_name = unicode(self.name).translate(
1788
733
{ord("."): ord("_"),
1789
734
ord("-"): ord("_")})
1790
self.dbus_object_path = dbus.ObjectPath(
1791
"/clients/" + client_object_name)
735
self.dbus_object_path = (dbus.ObjectPath
736
("/clients/" + client_object_name))
1792
737
DBusObjectWithProperties.__init__(self, self.bus,
1793
738
self.dbus_object_path)
1794
1795
def notifychangeproperty(transform_func, dbus_name,
1796
type_func=lambda x: x,
1797
variant_level=1,
1798
invalidate_only=False,
1799
_interface=_interface):
1800
""" Modify a variable so that it's a property which announces
1801
its changes to DBus.
1802
1803
transform_fun: Function that takes a value and a variant_level
1804
and transforms it to a D-Bus type.
1805
dbus_name: D-Bus name of the variable
1806
type_func: Function that transform the value before sending it
1807
to the D-Bus. Default: no transform
1808
variant_level: D-Bus variant level. Default: 1
1809
"""
1810
attrname = "_{}".format(dbus_name)
1811
1812
def setter(self, value):
1813
if hasattr(self, "dbus_object_path"):
1814
if (not hasattr(self, attrname) or
1815
type_func(getattr(self, attrname, None))
1816
!= type_func(value)):
1817
if invalidate_only:
1818
self.PropertiesChanged(
1819
_interface, dbus.Dictionary(),
1820
dbus.Array((dbus_name, )))
1821
else:
1822
dbus_value = transform_func(
1823
type_func(value),
1824
variant_level=variant_level)
1825
self.PropertyChanged(dbus.String(dbus_name),
1826
dbus_value)
1827
self.PropertiesChanged(
1828
_interface,
1829
dbus.Dictionary({dbus.String(dbus_name):
1830
dbus_value}),
1831
dbus.Array())
1832
setattr(self, attrname, value)
1833
1834
return property(lambda self: getattr(self, attrname), setter)
1835
1836
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1837
approvals_pending = notifychangeproperty(dbus.Boolean,
1838
"ApprovalPending",
1839
type_func=bool)
1840
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1841
last_enabled = notifychangeproperty(datetime_to_dbus,
1842
"LastEnabled")
1843
checker = notifychangeproperty(
1844
dbus.Boolean, "CheckerRunning",
1845
type_func=lambda checker: checker is not None)
1846
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1847
"LastCheckedOK")
1848
last_checker_status = notifychangeproperty(dbus.Int16,
1849
"LastCheckerStatus")
1850
last_approval_request = notifychangeproperty(
1851
datetime_to_dbus, "LastApprovalRequest")
1852
approved_by_default = notifychangeproperty(dbus.Boolean,
1853
"ApprovedByDefault")
1854
approval_delay = notifychangeproperty(
1855
dbus.UInt64, "ApprovalDelay",
1856
type_func=lambda td: td.total_seconds() * 1000)
1857
approval_duration = notifychangeproperty(
1858
dbus.UInt64, "ApprovalDuration",
1859
type_func=lambda td: td.total_seconds() * 1000)
1860
host = notifychangeproperty(dbus.String, "Host")
1861
timeout = notifychangeproperty(
1862
dbus.UInt64, "Timeout",
1863
type_func=lambda td: td.total_seconds() * 1000)
1864
extended_timeout = notifychangeproperty(
1865
dbus.UInt64, "ExtendedTimeout",
1866
type_func=lambda td: td.total_seconds() * 1000)
1867
interval = notifychangeproperty(
1868
dbus.UInt64, "Interval",
1869
type_func=lambda td: td.total_seconds() * 1000)
1870
checker_command = notifychangeproperty(dbus.String, "Checker")
1871
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1872
invalidate_only=True)
1873
1874
del notifychangeproperty
1875
739
740
def _get_approvals_pending(self):
741
return self._approvals_pending
742
def _set_approvals_pending(self, value):
743
old_value = self._approvals_pending
744
self._approvals_pending = value
745
bval = bool(value)
746
if (hasattr(self, "dbus_object_path")
747
and bval is not bool(old_value)):
748
dbus_bool = dbus.Boolean(bval, variant_level=1)
749
self.PropertyChanged(dbus.String("ApprovalPending"),
750
dbus_bool)
751
752
approvals_pending = property(_get_approvals_pending,
753
_set_approvals_pending)
754
del _get_approvals_pending, _set_approvals_pending
755
756
@staticmethod
757
def _datetime_to_dbus(dt, variant_level=0):
758
"""Convert a UTC datetime.datetime() to a D-Bus type."""
759
return dbus.String(dt.isoformat(),
760
variant_level=variant_level)
761
762
def enable(self):
763
oldstate = getattr(self, "enabled", False)
764
r = Client.enable(self)
765
if oldstate != self.enabled:
766
# Emit D-Bus signals
767
self.PropertyChanged(dbus.String("Enabled"),
768
dbus.Boolean(True, variant_level=1))
769
self.PropertyChanged(
770
dbus.String("LastEnabled"),
771
self._datetime_to_dbus(self.last_enabled,
772
variant_level=1))
773
return r
774
775
def disable(self, quiet = False):
776
oldstate = getattr(self, "enabled", False)
777
r = Client.disable(self, quiet=quiet)
778
if not quiet and oldstate != self.enabled:
779
# Emit D-Bus signal
780
self.PropertyChanged(dbus.String("Enabled"),
781
dbus.Boolean(False, variant_level=1))
782
return r
783
1876
784
def __del__(self, *args, **kwargs):
1877
785
try:
1878
786
self.remove_from_connection()
1881
789
if hasattr(DBusObjectWithProperties, "__del__"):
1882
790
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1883
791
Client.__del__(self, *args, **kwargs)
1884
1885
def checker_callback(self, source, condition,
1886
connection, command, *args, **kwargs):
1887
ret = Client.checker_callback(self, source, condition,
1888
connection, command, *args,
1889
**kwargs)
1890
exitstatus = self.last_checker_status
1891
if exitstatus >= 0:
792
793
def checker_callback(self, pid, condition, command,
794
*args, **kwargs):
795
self.checker_callback_tag = None
796
self.checker = None
797
# Emit D-Bus signal
798
self.PropertyChanged(dbus.String("CheckerRunning"),
799
dbus.Boolean(False, variant_level=1))
800
if os.WIFEXITED(condition):
801
exitstatus = os.WEXITSTATUS(condition)
1892
802
# Emit D-Bus signal
1893
803
self.CheckerCompleted(dbus.Int16(exitstatus),
1894
# This is specific to GNU libC
1895
dbus.Int64(exitstatus << 8),
804
dbus.Int64(condition),
1896
805
dbus.String(command))
1897
806
else:
1898
807
# Emit D-Bus signal
1899
808
self.CheckerCompleted(dbus.Int16(-1),
1900
dbus.Int64(
1901
# This is specific to GNU libC
1902
(exitstatus << 8)
1903
| self.last_checker_signal),
809
dbus.Int64(condition),
1904
810
dbus.String(command))
1905
return ret
1906
811
812
return Client.checker_callback(self, pid, condition, command,
813
*args, **kwargs)
814
815
def checked_ok(self, *args, **kwargs):
816
r = Client.checked_ok(self, *args, **kwargs)
817
# Emit D-Bus signal
818
self.PropertyChanged(
819
dbus.String("LastCheckedOK"),
820
(self._datetime_to_dbus(self.last_checked_ok,
821
variant_level=1)))
822
return r
823
824
def need_approval(self, *args, **kwargs):
825
r = Client.need_approval(self, *args, **kwargs)
826
# Emit D-Bus signal
827
self.PropertyChanged(
828
dbus.String("LastApprovalRequest"),
829
(self._datetime_to_dbus(self.last_approval_request,
830
variant_level=1)))
831
return r
832
1907
833
def start_checker(self, *args, **kwargs):
1908
old_checker_pid = getattr(self.checker, "pid", None)
834
old_checker = self.checker
835
if self.checker is not None:
836
old_checker_pid = self.checker.pid
837
else:
838
old_checker_pid = None
1909
839
r = Client.start_checker(self, *args, **kwargs)
1910
840
# Only if new checker process was started
1911
841
if (self.checker is not None
1912
842
and old_checker_pid != self.checker.pid):
1913
843
# Emit D-Bus signal
1914
844
self.CheckerStarted(self.current_checker_command)
845
self.PropertyChanged(
846
dbus.String("CheckerRunning"),
847
dbus.Boolean(True, variant_level=1))
848
return r
849
850
def stop_checker(self, *args, **kwargs):
851
old_checker = getattr(self, "checker", None)
852
r = Client.stop_checker(self, *args, **kwargs)
853
if (old_checker is not None
854
and getattr(self, "checker", None) is None):
855
self.PropertyChanged(dbus.String("CheckerRunning"),
856
dbus.Boolean(False, variant_level=1))
1915
857
return r
1916
858
1917
859
def _reset_approved(self):
1918
self.approved = None
860
self._approved = None
1919
861
return False
1920
862
1921
863
def approve(self, value=True):
1922
self.approved = value
1923
GLib.timeout_add(int(self.approval_duration.total_seconds()
1924
* 1000), self._reset_approved)
1925
864
self.send_changedstate()
1926
1927
# D-Bus methods, signals & properties
1928
1929
# Interfaces
1930
1931
# Signals
1932
865
self._approved = value
866
gobject.timeout_add(self._timedelta_to_milliseconds
867
(self.approval_duration),
868
self._reset_approved)
869
870
871
## D-Bus methods, signals & properties
872
_interface = "se.bsnet.fukt.Mandos.Client"
873
874
## Signals
875
1933
876
# CheckerCompleted - signal
1934
877
@dbus.service.signal(_interface, signature="nxs")
1935
878
def CheckerCompleted(self, exitcode, waitstatus, command):
1936
879
"D-Bus signal"
1937
880
pass
1938
881
1939
882
# CheckerStarted - signal
1940
883
@dbus.service.signal(_interface, signature="s")
1941
884
def CheckerStarted(self, command):
1942
885
"D-Bus signal"
1943
886
pass
1944
887
1945
888
# PropertyChanged - signal
1946
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1947
889
@dbus.service.signal(_interface, signature="sv")
1948
890
def PropertyChanged(self, property, value):
1949
891
"D-Bus signal"
1950
892
pass
1951
893
1952
894
# GotSecret - signal
1953
895
@dbus.service.signal(_interface)
1954
896
def GotSecret(self):
1957
899
server to mandos-client
1958
900
"""
1959
901
pass
1960
902
1961
903
# Rejected - signal
1962
904
@dbus.service.signal(_interface, signature="s")
1963
905
def Rejected(self, reason):
1964
906
"D-Bus signal"
1965
907
pass
1966
908
1967
909
# NeedApproval - signal
1968
910
@dbus.service.signal(_interface, signature="tb")
1969
911
def NeedApproval(self, timeout, default):
1970
912
"D-Bus signal"
1971
913
return self.need_approval()
1972
1973
# Methods
1974
914
915
## Methods
916
1975
917
# Approve - method
1976
918
@dbus.service.method(_interface, in_signature="b")
1977
919
def Approve(self, value):
1978
920
self.approve(value)
1979
921
1980
922
# CheckedOK - method
1981
923
@dbus.service.method(_interface)
1982
924
def CheckedOK(self):
1983
self.checked_ok()
1984
925
return self.checked_ok()
926
1985
927
# Enable - method
1986
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1987
928
@dbus.service.method(_interface)
1988
929
def Enable(self):
1989
930
"D-Bus method"
1990
931
self.enable()
1991
932
1992
933
# StartChecker - method
1993
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1994
934
@dbus.service.method(_interface)
1995
935
def StartChecker(self):
1996
936
"D-Bus method"
1997
937
self.start_checker()
1998
938
1999
939
# Disable - method
2000
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2001
940
@dbus.service.method(_interface)
2002
941
def Disable(self):
2003
942
"D-Bus method"
2004
943
self.disable()
2005
944
2006
945
# StopChecker - method
2007
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2008
946
@dbus.service.method(_interface)
2009
947
def StopChecker(self):
2010
948
self.stop_checker()
2011
2012
# Properties
2013
949
950
## Properties
951
2014
952
# ApprovalPending - property
2015
953
@dbus_service_property(_interface, signature="b", access="read")
2016
954
def ApprovalPending_dbus_property(self):
2017
955
return dbus.Boolean(bool(self.approvals_pending))
2018
956
2019
957
# ApprovedByDefault - property
2020
@dbus_service_property(_interface,
2021
signature="b",
958
@dbus_service_property(_interface, signature="b",
2022
959
access="readwrite")
2023
960
def ApprovedByDefault_dbus_property(self, value=None):
2024
961
if value is None: # get
2025
962
return dbus.Boolean(self.approved_by_default)
2026
963
self.approved_by_default = bool(value)
2027
964
# Emit D-Bus signal
965
self.PropertyChanged(dbus.String("ApprovedByDefault"),
966
dbus.Boolean(value, variant_level=1))
967
2028
968
# ApprovalDelay - property
2029
@dbus_service_property(_interface,
2030
signature="t",
969
@dbus_service_property(_interface, signature="t",
2031
970
access="readwrite")
2032
971
def ApprovalDelay_dbus_property(self, value=None):
2033
972
if value is None: # get
2034
return dbus.UInt64(self.approval_delay.total_seconds()
2035
* 1000)
973
return dbus.UInt64(self.approval_delay_milliseconds())
2036
974
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2037
975
# Emit D-Bus signal
976
self.PropertyChanged(dbus.String("ApprovalDelay"),
977
dbus.UInt64(value, variant_level=1))
978
2038
979
# ApprovalDuration - property
2039
@dbus_service_property(_interface,
2040
signature="t",
980
@dbus_service_property(_interface, signature="t",
2041
981
access="readwrite")
2042
982
def ApprovalDuration_dbus_property(self, value=None):
2043
983
if value is None: # get
2044
return dbus.UInt64(self.approval_duration.total_seconds()
2045
* 1000)
984
return dbus.UInt64(self._timedelta_to_milliseconds(
985
self.approval_duration))
2046
986
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2047
987
# Emit D-Bus signal
988
self.PropertyChanged(dbus.String("ApprovalDuration"),
989
dbus.UInt64(value, variant_level=1))
990
2048
991
# Name - property
2049
@dbus_annotations(
2050
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2051
992
@dbus_service_property(_interface, signature="s", access="read")
2052
993
def Name_dbus_property(self):
2053
994
return dbus.String(self.name)
2054
2055
# KeyID - property
2056
@dbus_annotations(
2057
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2058
@dbus_service_property(_interface, signature="s", access="read")
2059
def KeyID_dbus_property(self):
2060
return dbus.String(self.key_id)
2061
995
2062
996
# Fingerprint - property
2063
@dbus_annotations(
2064
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2065
997
@dbus_service_property(_interface, signature="s", access="read")
2066
998
def Fingerprint_dbus_property(self):
2067
999
return dbus.String(self.fingerprint)
2068
1000
2069
1001
# Host - property
2070
@dbus_service_property(_interface,
2071
signature="s",
1002
@dbus_service_property(_interface, signature="s",
2072
1003
access="readwrite")
2073
1004
def Host_dbus_property(self, value=None):
2074
1005
if value is None: # get
2075
1006
return dbus.String(self.host)
2076
self.host = str(value)
2077
1007
self.host = value
1008
# Emit D-Bus signal
1009
self.PropertyChanged(dbus.String("Host"),
1010
dbus.String(value, variant_level=1))
1011
2078
1012
# Created - property
2079
@dbus_annotations(
2080
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2081
1013
@dbus_service_property(_interface, signature="s", access="read")
2082
1014
def Created_dbus_property(self):
2083
return datetime_to_dbus(self.created)
2084
1015
return dbus.String(self._datetime_to_dbus(self.created))
1016
2085
1017
# LastEnabled - property
2086
1018
@dbus_service_property(_interface, signature="s", access="read")
2087
1019
def LastEnabled_dbus_property(self):
2088
return datetime_to_dbus(self.last_enabled)
2089
1020
if self.last_enabled is None:
1021
return dbus.String("")
1022
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1023
2090
1024
# Enabled - property
2091
@dbus_service_property(_interface,
2092
signature="b",
1025
@dbus_service_property(_interface, signature="b",
2093
1026
access="readwrite")
2094
1027
def Enabled_dbus_property(self, value=None):
2095
1028
if value is None: # get
2098
1031
self.enable()
2099
1032
else:
2100
1033
self.disable()
2101
1034
2102
1035
# LastCheckedOK - property
2103
@dbus_service_property(_interface,
2104
signature="s",
1036
@dbus_service_property(_interface, signature="s",
2105
1037
access="readwrite")
2106
1038
def LastCheckedOK_dbus_property(self, value=None):
2107
1039
if value is not None:
2108
1040
self.checked_ok()
2109
1041
return
2110
return datetime_to_dbus(self.last_checked_ok)
2111
2112
# LastCheckerStatus - property
2113
@dbus_service_property(_interface, signature="n", access="read")
2114
def LastCheckerStatus_dbus_property(self):
2115
return dbus.Int16(self.last_checker_status)
2116
2117
# Expires - property
2118
@dbus_service_property(_interface, signature="s", access="read")
2119
def Expires_dbus_property(self):
2120
return datetime_to_dbus(self.expires)
2121
1042
if self.last_checked_ok is None:
1043
return dbus.String("")
1044
return dbus.String(self._datetime_to_dbus(self
1045
.last_checked_ok))
1046
2122
1047
# LastApprovalRequest - property
2123
1048
@dbus_service_property(_interface, signature="s", access="read")
2124
1049
def LastApprovalRequest_dbus_property(self):
2125
return datetime_to_dbus(self.last_approval_request)
2126
1050
if self.last_approval_request is None:
1051
return dbus.String("")
1052
return dbus.String(self.
1053
_datetime_to_dbus(self
1054
.last_approval_request))
1055
2127
1056
# Timeout - property
2128
@dbus_service_property(_interface,
2129
signature="t",
1057
@dbus_service_property(_interface, signature="t",
2130
1058
access="readwrite")
2131
1059
def Timeout_dbus_property(self, value=None):
2132
1060
if value is None: # get
2133
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2134
old_timeout = self.timeout
1061
return dbus.UInt64(self.timeout_milliseconds())
2135
1062
self.timeout = datetime.timedelta(0, 0, 0, value)
2136
# Reschedule disabling
2137
if self.enabled:
2138
now = datetime.datetime.utcnow()
2139
self.expires += self.timeout - old_timeout
2140
if self.expires <= now:
2141
# The timeout has passed
2142
self.disable()
2143
else:
2144
if (getattr(self, "disable_initiator_tag", None)
2145
is None):
2146
return
2147
GLib.source_remove(self.disable_initiator_tag)
2148
self.disable_initiator_tag = GLib.timeout_add(
2149
int((self.expires - now).total_seconds() * 1000),
2150
self.disable)
2151
2152
# ExtendedTimeout - property
2153
@dbus_service_property(_interface,
2154
signature="t",
2155
access="readwrite")
2156
def ExtendedTimeout_dbus_property(self, value=None):
2157
if value is None: # get
2158
return dbus.UInt64(self.extended_timeout.total_seconds()
2159
* 1000)
2160
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2161
1063
# Emit D-Bus signal
1064
self.PropertyChanged(dbus.String("Timeout"),
1065
dbus.UInt64(value, variant_level=1))
1066
if getattr(self, "disable_initiator_tag", None) is None:
1067
return
1068
# Reschedule timeout
1069
gobject.source_remove(self.disable_initiator_tag)
1070
self.disable_initiator_tag = None
1071
time_to_die = (self.
1072
_timedelta_to_milliseconds((self
1073
.last_checked_ok
1074
+ self.timeout)
1075
- datetime.datetime
1076
.utcnow()))
1077
if time_to_die <= 0:
1078
# The timeout has passed
1079
self.disable()
1080
else:
1081
self.disable_initiator_tag = (gobject.timeout_add
1082
(time_to_die, self.disable))
1083
2162
1084
# Interval - property
2163
@dbus_service_property(_interface,
2164
signature="t",
1085
@dbus_service_property(_interface, signature="t",
2165
1086
access="readwrite")
2166
1087
def Interval_dbus_property(self, value=None):
2167
1088
if value is None: # get
2168
return dbus.UInt64(self.interval.total_seconds() * 1000)
1089
return dbus.UInt64(self.interval_milliseconds())
2169
1090
self.interval = datetime.timedelta(0, 0, 0, value)
1091
# Emit D-Bus signal
1092
self.PropertyChanged(dbus.String("Interval"),
1093
dbus.UInt64(value, variant_level=1))
2170
1094
if getattr(self, "checker_initiator_tag", None) is None:
2171
1095
return
2172
if self.enabled:
2173
# Reschedule checker run
2174
GLib.source_remove(self.checker_initiator_tag)
2175
self.checker_initiator_tag = GLib.timeout_add(
2176
value, self.start_checker)
2177
self.start_checker() # Start one now, too
1096
# Reschedule checker run
1097
gobject.source_remove(self.checker_initiator_tag)
1098
self.checker_initiator_tag = (gobject.timeout_add
1099
(value, self.start_checker))
1100
self.start_checker() # Start one now, too
2178
1101
2179
1102
# Checker - property
2180
@dbus_service_property(_interface,
2181
signature="s",
1103
@dbus_service_property(_interface, signature="s",
2182
1104
access="readwrite")
2183
1105
def Checker_dbus_property(self, value=None):
2184
1106
if value is None: # get
2185
1107
return dbus.String(self.checker_command)
2186
self.checker_command = str(value)
2187
1108
self.checker_command = value
1109
# Emit D-Bus signal
1110
self.PropertyChanged(dbus.String("Checker"),
1111
dbus.String(self.checker_command,
1112
variant_level=1))
1113
2188
1114
# CheckerRunning - property
2189
@dbus_service_property(_interface,
2190
signature="b",
1115
@dbus_service_property(_interface, signature="b",
2191
1116
access="readwrite")
2192
1117
def CheckerRunning_dbus_property(self, value=None):
2193
1118
if value is None: # get
2196
1121
self.start_checker()
2197
1122
else:
2198
1123
self.stop_checker()
2199
1124
2200
1125
# ObjectPath - property
2201
@dbus_annotations(
2202
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2203
"org.freedesktop.DBus.Deprecated": "true"})
2204
1126
@dbus_service_property(_interface, signature="o", access="read")
2205
1127
def ObjectPath_dbus_property(self):
2206
return self.dbus_object_path # is already a dbus.ObjectPath
2207
1128
return self.dbus_object_path # is already a dbus.ObjectPath
1129
2208
1130
# Secret = property
2209
@dbus_annotations(
2210
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2211
"invalidates"})
2212
@dbus_service_property(_interface,
2213
signature="ay",
2214
access="write",
2215
byte_arrays=True)
1131
@dbus_service_property(_interface, signature="ay",
1132
access="write", byte_arrays=True)
2216
1133
def Secret_dbus_property(self, value):
2217
self.secret = bytes(value)
2218
1134
self.secret = str(value)
1135
2219
1136
del _interface
2220
1137
2221
1138
2222
1139
class ProxyClient(object):
2223
def __init__(self, child_pipe, key_id, fpr, address):
1140
def __init__(self, child_pipe, fpr, address):
2224
1141
self._pipe = child_pipe
2225
self._pipe.send(('init', key_id, fpr, address))
1142
self._pipe.send(('init', fpr, address))
2226
1143
if not self._pipe.recv():
2227
raise KeyError(key_id or fpr)
1144
raise KeyError()
2228
1145
2229
1146
def __getattribute__(self, name):
2230
if name == '_pipe':
1147
if(name == '_pipe'):
2231
1148
return super(ProxyClient, self).__getattribute__(name)
2232
1149
self._pipe.send(('getattr', name))
2233
1150
data = self._pipe.recv()
2234
1151
if data[0] == 'data':
2235
1152
return data[1]
2236
1153
if data[0] == 'function':
2237
2238
1154
def func(*args, **kwargs):
2239
1155
self._pipe.send(('funcall', name, args, kwargs))
2240
1156
return self._pipe.recv()[1]
2241
2242
1157
return func
2243
1158
2244
1159
def __setattr__(self, name, value):
2245
if name == '_pipe':
1160
if(name == '_pipe'):
2246
1161
return super(ProxyClient, self).__setattr__(name, value)
2247
1162
self._pipe.send(('setattr', name, value))
2248
1163
2249
1164
2250
1165
class ClientHandler(socketserver.BaseRequestHandler, object):
2251
1166
"""A class to handle client connections.
2252
1167
2253
1168
Instantiated once for each connection to handle it.
2254
1169
Note: This will run in its own forked process."""
2255
1170
2256
1171
def handle(self):
2257
1172
with contextlib.closing(self.server.child_pipe) as child_pipe:
2258
1173
logger.info("TCP connection from: %s",
2259
str(self.client_address))
1174
unicode(self.client_address))
2260
1175
logger.debug("Pipe FD: %d",
2261
1176
self.server.child_pipe.fileno())
2262
1177
2263
session = gnutls.ClientSession(self.request)
2264
2265
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2266
# "+AES-256-CBC", "+SHA1",
2267
# "+COMP-NULL", "+CTYPE-OPENPGP",
2268
# "+DHE-DSS"))
1178
session = (gnutls.connection
1179
.ClientSession(self.request,
1180
gnutls.connection
1181
.X509Credentials()))
1182
1183
# Note: gnutls.connection.X509Credentials is really a
1184
# generic GnuTLS certificate credentials object so long as
1185
# no X.509 keys are added to it. Therefore, we can use it
1186
# here despite using OpenPGP certificates.
1187
1188
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1189
# "+AES-256-CBC", "+SHA1",
1190
# "+COMP-NULL", "+CTYPE-OPENPGP",
1191
# "+DHE-DSS"))
2269
1192
# Use a fallback default, since this MUST be set.
2270
1193
priority = self.server.gnutls_priority
2271
1194
if priority is None:
2272
1195
priority = "NORMAL"
2273
gnutls.priority_set_direct(session._c_object,
2274
priority.encode("utf-8"),
2275
None)
1196
(gnutls.library.functions
1197
.gnutls_priority_set_direct(session._c_object,
1198
priority, None))
2276
1199
2277
1200
# Start communication using the Mandos protocol
2278
1201
# Get protocol number
2280
1203
logger.debug("Protocol version: %r", line)
2281
1204
try:
2282
1205
if int(line.strip().split()[0]) > 1:
2283
raise RuntimeError(line)
2284
except (ValueError, IndexError, RuntimeError) as error:
1206
raise RuntimeError
1207
except (ValueError, IndexError, RuntimeError), error:
2285
1208
logger.error("Unknown protocol version: %s", error)
2286
1209
return
2287
1210
2288
1211
# Start GnuTLS connection
2289
1212
try:
2290
1213
session.handshake()
2291
except gnutls.Error as error:
1214
except gnutls.errors.GNUTLSError, error:
2292
1215
logger.warning("Handshake failed: %s", error)
2293
1216
# Do not run session.bye() here: the session is not
2294
1217
# established. Just abandon the request.
2297
1220
2298
1221
approval_required = False
2299
1222
try:
2300
if gnutls.has_rawpk:
2301
fpr = ""
2302
try:
2303
key_id = self.key_id(
2304
self.peer_certificate(session))
2305
except (TypeError, gnutls.Error) as error:
2306
logger.warning("Bad certificate: %s", error)
2307
return
2308
logger.debug("Key ID: %s", key_id)
2309
2310
else:
2311
key_id = ""
2312
try:
2313
fpr = self.fingerprint(
2314
self.peer_certificate(session))
2315
except (TypeError, gnutls.Error) as error:
2316
logger.warning("Bad certificate: %s", error)
2317
return
2318
logger.debug("Fingerprint: %s", fpr)
2319
2320
try:
2321
client = ProxyClient(child_pipe, key_id, fpr,
1223
try:
1224
fpr = self.fingerprint(self.peer_certificate
1225
(session))
1226
except (TypeError, gnutls.errors.GNUTLSError), error:
1227
logger.warning("Bad certificate: %s", error)
1228
return
1229
logger.debug("Fingerprint: %s", fpr)
1230
1231
try:
1232
client = ProxyClient(child_pipe, fpr,
2322
1233
self.client_address)
2323
1234
except KeyError:
2324
1235
return
2325
1236
2326
1237
if client.approval_delay:
2327
1238
delay = client.approval_delay
2328
1239
client.approvals_pending += 1
2329
1240
approval_required = True
2330
1241
2331
1242
while True:
2332
1243
if not client.enabled:
2333
logger.info("Client %s is disabled",
2334
client.name)
1244
logger.warning("Client %s is disabled",
1245
client.name)
2335
1246
if self.server.use_dbus:
2336
1247
# Emit D-Bus signal
2337
client.Rejected("Disabled")
1248
client.Rejected("Disabled")
2338
1249
return
2339
2340
if client.approved or not client.approval_delay:
2341
# We are approved or approval is disabled
1250
1251
if client._approved or not client.approval_delay:
1252
#We are approved or approval is disabled
2342
1253
break
2343
elif client.approved is None:
1254
elif client._approved is None:
2344
1255
logger.info("Client %s needs approval",
2345
1256
client.name)
2346
1257
if self.server.use_dbus:
2347
1258
# Emit D-Bus signal
2348
1259
client.NeedApproval(
2349
client.approval_delay.total_seconds()
2350
* 1000, client.approved_by_default)
1260
client.approval_delay_milliseconds(),
1261
client.approved_by_default)
2351
1262
else:
2352
1263
logger.warning("Client %s was not approved",
2353
1264
client.name)
2355
1266
# Emit D-Bus signal
2356
1267
client.Rejected("Denied")
2357
1268
return
2358
2359
# wait until timeout or approved
1269
1270
#wait until timeout or approved
1271
#x = float(client._timedelta_to_milliseconds(delay))
2360
1272
time = datetime.datetime.now()
2361
1273
client.changedstate.acquire()
2362
client.changedstate.wait(delay.total_seconds())
1274
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
2363
1275
client.changedstate.release()
2364
1276
time2 = datetime.datetime.now()
2365
1277
if (time2 - time) >= delay:
2375
1287
break
2376
1288
else:
2377
1289
delay -= time2 - time
2378
2379
try:
2380
session.send(client.secret)
2381
except gnutls.Error as error:
2382
logger.warning("gnutls send failed",
2383
exc_info=error)
2384
return
1290
1291
sent_size = 0
1292
while sent_size < len(client.secret):
1293
try:
1294
sent = session.send(client.secret[sent_size:])
1295
except (gnutls.errors.GNUTLSError), error:
1296
logger.warning("gnutls send failed")
1297
return
1298
logger.debug("Sent: %d, remaining: %d",
1299
sent, len(client.secret)
1300
- (sent_size + sent))
1301
sent_size += sent
2385
1302
2386
1303
logger.info("Sending secret to %s", client.name)
2387
# bump the timeout using extended_timeout
2388
client.bump_timeout(client.extended_timeout)
1304
# bump the timeout as if seen
1305
client.checked_ok()
2389
1306
if self.server.use_dbus:
2390
1307
# Emit D-Bus signal
2391
1308
client.GotSecret()
2392
1309
2393
1310
finally:
2394
1311
if approval_required:
2395
1312
client.approvals_pending -= 1
2396
1313
try:
2397
1314
session.bye()
2398
except gnutls.Error as error:
2399
logger.warning("GnuTLS bye failed",
2400
exc_info=error)
2401
1315
except (gnutls.errors.GNUTLSError), error:
1316
logger.warning("GnuTLS bye failed")
1317
2402
1318
@staticmethod
2403
1319
def peer_certificate(session):
2404
"Return the peer's certificate as a bytestring"
2405
try:
2406
cert_type = gnutls.certificate_type_get2(session._c_object,
2407
gnutls.CTYPE_PEERS)
2408
except AttributeError:
2409
cert_type = gnutls.certificate_type_get(session._c_object)
2410
if gnutls.has_rawpk:
2411
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2412
else:
2413
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2414
# If not a valid certificate type...
2415
if cert_type not in valid_cert_types:
2416
logger.info("Cert type %r not in %r", cert_type,
2417
valid_cert_types)
2418
# ...return invalid data
2419
return b""
1320
"Return the peer's OpenPGP certificate as a bytestring"
1321
# If not an OpenPGP certificate...
1322
if (gnutls.library.functions
1323
.gnutls_certificate_type_get(session._c_object)
1324
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1325
# ...do the normal thing
1326
return session.peer_certificate
2420
1327
list_size = ctypes.c_uint(1)
2421
cert_list = (gnutls.certificate_get_peers
1328
cert_list = (gnutls.library.functions
1329
.gnutls_certificate_get_peers
2422
1330
(session._c_object, ctypes.byref(list_size)))
2423
1331
if not bool(cert_list) and list_size.value != 0:
2424
raise gnutls.Error("error getting peer certificate")
1332
raise gnutls.errors.GNUTLSError("error getting peer"
1333
" certificate")
2425
1334
if list_size.value == 0:
2426
1335
return None
2427
1336
cert = cert_list[0]
2428
1337
return ctypes.string_at(cert.data, cert.size)
2429
2430
@staticmethod
2431
def key_id(certificate):
2432
"Convert a certificate bytestring to a hexdigit key ID"
2433
# New GnuTLS "datum" with the public key
2434
datum = gnutls.datum_t(
2435
ctypes.cast(ctypes.c_char_p(certificate),
2436
ctypes.POINTER(ctypes.c_ubyte)),
2437
ctypes.c_uint(len(certificate)))
2438
# XXX all these need to be created in the gnutls "module"
2439
# New empty GnuTLS certificate
2440
pubkey = gnutls.pubkey_t()
2441
gnutls.pubkey_init(ctypes.byref(pubkey))
2442
# Import the raw public key into the certificate
2443
gnutls.pubkey_import(pubkey,
2444
ctypes.byref(datum),
2445
gnutls.X509_FMT_DER)
2446
# New buffer for the key ID
2447
buf = ctypes.create_string_buffer(32)
2448
buf_len = ctypes.c_size_t(len(buf))
2449
# Get the key ID from the raw public key into the buffer
2450
gnutls.pubkey_get_key_id(pubkey,
2451
gnutls.KEYID_USE_SHA256,
2452
ctypes.cast(ctypes.byref(buf),
2453
ctypes.POINTER(ctypes.c_ubyte)),
2454
ctypes.byref(buf_len))
2455
# Deinit the certificate
2456
gnutls.pubkey_deinit(pubkey)
2457
2458
# Convert the buffer to a Python bytestring
2459
key_id = ctypes.string_at(buf, buf_len.value)
2460
# Convert the bytestring to hexadecimal notation
2461
hex_key_id = binascii.hexlify(key_id).upper()
2462
return hex_key_id
2463
1338
2464
1339
@staticmethod
2465
1340
def fingerprint(openpgp):
2466
1341
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2467
1342
# New GnuTLS "datum" with the OpenPGP public key
2468
datum = gnutls.datum_t(
2469
ctypes.cast(ctypes.c_char_p(openpgp),
2470
ctypes.POINTER(ctypes.c_ubyte)),
2471
ctypes.c_uint(len(openpgp)))
1343
datum = (gnutls.library.types
1344
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1345
ctypes.POINTER
1346
(ctypes.c_ubyte)),
1347
ctypes.c_uint(len(openpgp))))
2472
1348
# New empty GnuTLS certificate
2473
crt = gnutls.openpgp_crt_t()
2474
gnutls.openpgp_crt_init(ctypes.byref(crt))
1349
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1350
(gnutls.library.functions
1351
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2475
1352
# Import the OpenPGP public key into the certificate
2476
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2477
gnutls.OPENPGP_FMT_RAW)
1353
(gnutls.library.functions
1354
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1355
gnutls.library.constants
1356
.GNUTLS_OPENPGP_FMT_RAW))
2478
1357
# Verify the self signature in the key
2479
1358
crtverify = ctypes.c_uint()
2480
gnutls.openpgp_crt_verify_self(crt, 0,
2481
ctypes.byref(crtverify))
1359
(gnutls.library.functions
1360
.gnutls_openpgp_crt_verify_self(crt, 0,
1361
ctypes.byref(crtverify)))
2482
1362
if crtverify.value != 0:
2483
gnutls.openpgp_crt_deinit(crt)
2484
raise gnutls.CertificateSecurityError(code
2485
=crtverify.value)
1363
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1364
raise (gnutls.errors.CertificateSecurityError
1365
("Verify failed"))
2486
1366
# New buffer for the fingerprint
2487
1367
buf = ctypes.create_string_buffer(20)
2488
1368
buf_len = ctypes.c_size_t()
2489
1369
# Get the fingerprint from the certificate into the buffer
2490
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2491
ctypes.byref(buf_len))
1370
(gnutls.library.functions
1371
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1372
ctypes.byref(buf_len)))
2492
1373
# Deinit the certificate
2493
gnutls.openpgp_crt_deinit(crt)
1374
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2494
1375
# Convert the buffer to a Python bytestring
2495
1376
fpr = ctypes.string_at(buf, buf_len.value)
2496
1377
# Convert the bytestring to hexadecimal notation
2497
hex_fpr = binascii.hexlify(fpr).upper()
1378
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2498
1379
return hex_fpr
2499
1380
2500
1381
2501
1382
class MultiprocessingMixIn(object):
2502
1383
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2503
2504
1384
def sub_process_main(self, request, address):
2505
1385
try:
2506
1386
self.finish_request(request, address)
2507
except Exception:
1387
except:
2508
1388
self.handle_error(request, address)
2509
1389
self.close_request(request)
2510
1390
2511
1391
def process_request(self, request, address):
2512
1392
"""Start a new process to process the request."""
2513
proc = multiprocessing.Process(target=self.sub_process_main,
2514
args=(request, address))
2515
proc.start()
2516
return proc
2517
1393
multiprocessing.Process(target = self.sub_process_main,
1394
args = (request, address)).start()
2518
1395
2519
1396
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2520
1397
""" adds a pipe to the MixIn """
2521
2522
1398
def process_request(self, request, client_address):
2523
1399
"""Overrides and wraps the original process_request().
2524
1400
2525
1401
This function creates a new pipe in self.pipe
2526
1402
"""
2527
1403
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2528
1404
2529
proc = MultiprocessingMixIn.process_request(self, request,
2530
client_address)
1405
super(MultiprocessingMixInWithPipe,
1406
self).process_request(request, client_address)
2531
1407
self.child_pipe.close()
2532
self.add_pipe(parent_pipe, proc)
1408
self.add_pipe(parent_pipe)
2533
1409
2534
def add_pipe(self, parent_pipe, proc):
1410
def add_pipe(self, parent_pipe):
2535
1411
"""Dummy function; override as necessary"""
2536
raise NotImplementedError()
2537
1412
raise NotImplementedError
2538
1413
2539
1414
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2540
1415
socketserver.TCPServer, object):
2541
1416
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2542
1417
2543
1418
Attributes:
2544
1419
enabled: Boolean; whether this server is activated yet
2545
1420
interface: None or a network interface name (string)
2546
1421
use_ipv6: Boolean; to use IPv6 or not
2547
1422
"""
2548
2549
1423
def __init__(self, server_address, RequestHandlerClass,
2550
interface=None,
2551
use_ipv6=True,
2552
socketfd=None):
2553
"""If socketfd is set, use that file descriptor instead of
2554
creating a new one with socket.socket().
2555
"""
1424
interface=None, use_ipv6=True):
2556
1425
self.interface = interface
2557
1426
if use_ipv6:
2558
1427
self.address_family = socket.AF_INET6
2559
if socketfd is not None:
2560
# Save the file descriptor
2561
self.socketfd = socketfd
2562
# Save the original socket.socket() function
2563
self.socket_socket = socket.socket
2564
2565
# To implement --socket, we monkey patch socket.socket.
2566
#
2567
# (When socketserver.TCPServer is a new-style class, we
2568
# could make self.socket into a property instead of monkey
2569
# patching socket.socket.)
2570
#
2571
# Create a one-time-only replacement for socket.socket()
2572
@functools.wraps(socket.socket)
2573
def socket_wrapper(*args, **kwargs):
2574
# Restore original function so subsequent calls are
2575
# not affected.
2576
socket.socket = self.socket_socket
2577
del self.socket_socket
2578
# This time only, return a new socket object from the
2579
# saved file descriptor.
2580
return socket.fromfd(self.socketfd, *args, **kwargs)
2581
# Replace socket.socket() function with wrapper
2582
socket.socket = socket_wrapper
2583
# The socketserver.TCPServer.__init__ will call
2584
# socket.socket(), which might be our replacement,
2585
# socket_wrapper(), if socketfd was set.
2586
1428
socketserver.TCPServer.__init__(self, server_address,
2587
1429
RequestHandlerClass)
2588
2589
1430
def server_bind(self):
2590
1431
"""This overrides the normal server_bind() function
2591
1432
to bind to an interface if one was specified, and also NOT to
2592
1433
bind to an address or port if they were not specified."""
2593
global SO_BINDTODEVICE
2594
1434
if self.interface is not None:
2595
1435
if SO_BINDTODEVICE is None:
2596
# Fall back to a hard-coded value which seems to be
2597
# common enough.
2598
logger.warning("SO_BINDTODEVICE not found, trying 25")
2599
SO_BINDTODEVICE = 25
2600
try:
2601
self.socket.setsockopt(
2602
socket.SOL_SOCKET, SO_BINDTODEVICE,
2603
(self.interface + "\0").encode("utf-8"))
2604
except socket.error as error:
2605
if error.errno == errno.EPERM:
2606
logger.error("No permission to bind to"
2607
" interface %s", self.interface)
2608
elif error.errno == errno.ENOPROTOOPT:
2609
logger.error("SO_BINDTODEVICE not available;"
2610
" cannot bind to interface %s",
2611
self.interface)
2612
elif error.errno == errno.ENODEV:
2613
logger.error("Interface %s does not exist,"
2614
" cannot bind", self.interface)
2615
else:
2616
raise
1436
logger.error("SO_BINDTODEVICE does not exist;"
1437
" cannot bind to interface %s",
1438
self.interface)
1439
else:
1440
try:
1441
self.socket.setsockopt(socket.SOL_SOCKET,
1442
SO_BINDTODEVICE,
1443
str(self.interface
1444
+ '\0'))
1445
except socket.error, error:
1446
if error[0] == errno.EPERM:
1447
logger.error("No permission to"
1448
" bind to interface %s",
1449
self.interface)
1450
elif error[0] == errno.ENOPROTOOPT:
1451
logger.error("SO_BINDTODEVICE not available;"
1452
" cannot bind to interface %s",
1453
self.interface)
1454
else:
1455
raise
2617
1456
# Only bind(2) the socket if we really need to.
2618
1457
if self.server_address[0] or self.server_address[1]:
2619
1458
if not self.server_address[0]:
2620
1459
if self.address_family == socket.AF_INET6:
2621
any_address = "::" # in6addr_any
1460
any_address = "::" # in6addr_any
2622
1461
else:
2623
any_address = "0.0.0.0" # INADDR_ANY
1462
any_address = socket.INADDR_ANY
2624
1463
self.server_address = (any_address,
2625
1464
self.server_address[1])
2626
1465
elif not self.server_address[1]:
2627
self.server_address = (self.server_address[0], 0)
1466
self.server_address = (self.server_address[0],
1467
0)
2628
1468
# if self.interface:
2629
1469
# self.server_address = (self.server_address[0],
2630
1470
# 0, # port
2636
1476
2637
1477
class MandosServer(IPv6_TCPServer):
2638
1478
"""Mandos server.
2639
1479
2640
1480
Attributes:
2641
1481
clients: set of Client objects
2642
1482
gnutls_priority GnuTLS priority string
2643
1483
use_dbus: Boolean; to emit D-Bus signals or not
2644
2645
Assumes a GLib.MainLoop event loop.
1484
1485
Assumes a gobject.MainLoop event loop.
2646
1486
"""
2647
2648
1487
def __init__(self, server_address, RequestHandlerClass,
2649
interface=None,
2650
use_ipv6=True,
2651
clients=None,
2652
gnutls_priority=None,
2653
use_dbus=True,
2654
socketfd=None):
1488
interface=None, use_ipv6=True, clients=None,
1489
gnutls_priority=None, use_dbus=True):
2655
1490
self.enabled = False
2656
1491
self.clients = clients
2657
1492
if self.clients is None:
2658
self.clients = {}
1493
self.clients = set()
2659
1494
self.use_dbus = use_dbus
2660
1495
self.gnutls_priority = gnutls_priority
2661
1496
IPv6_TCPServer.__init__(self, server_address,
2662
1497
RequestHandlerClass,
2663
interface=interface,
2664
use_ipv6=use_ipv6,
2665
socketfd=socketfd)
2666
1498
interface = interface,
1499
use_ipv6 = use_ipv6)
2667
1500
def server_activate(self):
2668
1501
if self.enabled:
2669
1502
return socketserver.TCPServer.server_activate(self)
2670
2671
1503
def enable(self):
2672
1504
self.enabled = True
2673
2674
def add_pipe(self, parent_pipe, proc):
1505
def add_pipe(self, parent_pipe):
2675
1506
# Call "handle_ipc" for both data and EOF events
2676
GLib.io_add_watch(
2677
parent_pipe.fileno(),
2678
GLib.IO_IN | GLib.IO_HUP,
2679
functools.partial(self.handle_ipc,
2680
parent_pipe=parent_pipe,
2681
proc=proc))
2682
2683
def handle_ipc(self, source, condition,
2684
parent_pipe=None,
2685
proc=None,
1507
gobject.io_add_watch(parent_pipe.fileno(),
1508
gobject.IO_IN | gobject.IO_HUP,
1509
functools.partial(self.handle_ipc,
1510
parent_pipe = parent_pipe))
1511
1512
def handle_ipc(self, source, condition, parent_pipe=None,
2686
1513
client_object=None):
2687
# error, or the other end of multiprocessing.Pipe has closed
2688
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2689
# Wait for other process to exit
2690
proc.join()
1514
condition_names = {
1515
gobject.IO_IN: "IN", # There is data to read.
1516
gobject.IO_OUT: "OUT", # Data can be written (without
1517
# blocking).
1518
gobject.IO_PRI: "PRI", # There is urgent data to read.
1519
gobject.IO_ERR: "ERR", # Error condition.
1520
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1521
# broken, usually for pipes and
1522
# sockets).
1523
}
1524
conditions_string = ' | '.join(name
1525
for cond, name in
1526
condition_names.iteritems()
1527
if cond & condition)
1528
# error or the other end of multiprocessing.Pipe has closed
1529
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2691
1530
return False
2692
1531
2693
1532
# Read a request from the child
2694
1533
request = parent_pipe.recv()
2695
1534
command = request[0]
2696
1535
2697
1536
if command == 'init':
2698
key_id = request[1].decode("ascii")
2699
fpr = request[2].decode("ascii")
2700
address = request[3]
2701
2702
for c in self.clients.values():
2703
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2704
continue
2705
if key_id and c.key_id == key_id:
2706
client = c
2707
break
2708
if fpr and c.fingerprint == fpr:
1537
fpr = request[1]
1538
address = request[2]
1539
1540
for c in self.clients:
1541
if c.fingerprint == fpr:
2709
1542
client = c
2710
1543
break
2711
1544
else:
2712
logger.info("Client not found for key ID: %s, address"
2713
": %s", key_id or fpr, address)
1545
logger.warning("Client not found for fingerprint: %s, ad"
1546
"dress: %s", fpr, address)
2714
1547
if self.use_dbus:
2715
1548
# Emit D-Bus signal
2716
mandos_dbus_service.ClientNotFound(key_id or fpr,
2717
address[0])
1549
mandos_dbus_service.ClientNotFound(fpr, address[0])
2718
1550
parent_pipe.send(False)
2719
1551
return False
2720
2721
GLib.io_add_watch(
2722
parent_pipe.fileno(),
2723
GLib.IO_IN | GLib.IO_HUP,
2724
functools.partial(self.handle_ipc,
2725
parent_pipe=parent_pipe,
2726
proc=proc,
2727
client_object=client))
1552
1553
gobject.io_add_watch(parent_pipe.fileno(),
1554
gobject.IO_IN | gobject.IO_HUP,
1555
functools.partial(self.handle_ipc,
1556
parent_pipe = parent_pipe,
1557
client_object = client))
2728
1558
parent_pipe.send(True)
2729
# remove the old hook in favor of the new above hook on
2730
# same fileno
1559
# remove the old hook in favor of the new above hook on same fileno
2731
1560
return False
2732
1561
if command == 'funcall':
2733
1562
funcname = request[1]
2734
1563
args = request[2]
2735
1564
kwargs = request[3]
2736
2737
parent_pipe.send(('data', getattr(client_object,
2738
funcname)(*args,
2739
**kwargs)))
1565
1566
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
2740
1567
2741
1568
if command == 'getattr':
2742
1569
attrname = request[1]
2743
if isinstance(client_object.__getattribute__(attrname),
2744
collections.Callable):
2745
parent_pipe.send(('function', ))
1570
if callable(client_object.__getattribute__(attrname)):
1571
parent_pipe.send(('function',))
2746
1572
else:
2747
parent_pipe.send((
2748
'data', client_object.__getattribute__(attrname)))
2749
1573
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1574
2750
1575
if command == 'setattr':
2751
1576
attrname = request[1]
2752
1577
value = request[2]
2755
1580
return True
2756
1581
2757
1582
2758
def rfc3339_duration_to_delta(duration):
2759
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2760
2761
>>> rfc3339_duration_to_delta("P7D")
2762
datetime.timedelta(7)
2763
>>> rfc3339_duration_to_delta("PT60S")
2764
datetime.timedelta(0, 60)
2765
>>> rfc3339_duration_to_delta("PT60M")
2766
datetime.timedelta(0, 3600)
2767
>>> rfc3339_duration_to_delta("PT24H")
2768
datetime.timedelta(1)
2769
>>> rfc3339_duration_to_delta("P1W")
2770
datetime.timedelta(7)
2771
>>> rfc3339_duration_to_delta("PT5M30S")
2772
datetime.timedelta(0, 330)
2773
>>> rfc3339_duration_to_delta("P1DT3M20S")
2774
datetime.timedelta(1, 200)
2775
"""
2776
2777
# Parsing an RFC 3339 duration with regular expressions is not
2778
# possible - there would have to be multiple places for the same
2779
# values, like seconds. The current code, while more esoteric, is
2780
# cleaner without depending on a parsing library. If Python had a
2781
# built-in library for parsing we would use it, but we'd like to
2782
# avoid excessive use of external libraries.
2783
2784
# New type for defining tokens, syntax, and semantics all-in-one
2785
Token = collections.namedtuple("Token", (
2786
"regexp", # To match token; if "value" is not None, must have
2787
# a "group" containing digits
2788
"value", # datetime.timedelta or None
2789
"followers")) # Tokens valid after this token
2790
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2791
# the "duration" ABNF definition in RFC 3339, Appendix A.
2792
token_end = Token(re.compile(r"$"), None, frozenset())
2793
token_second = Token(re.compile(r"(\d+)S"),
2794
datetime.timedelta(seconds=1),
2795
frozenset((token_end, )))
2796
token_minute = Token(re.compile(r"(\d+)M"),
2797
datetime.timedelta(minutes=1),
2798
frozenset((token_second, token_end)))
2799
token_hour = Token(re.compile(r"(\d+)H"),
2800
datetime.timedelta(hours=1),
2801
frozenset((token_minute, token_end)))
2802
token_time = Token(re.compile(r"T"),
2803
None,
2804
frozenset((token_hour, token_minute,
2805
token_second)))
2806
token_day = Token(re.compile(r"(\d+)D"),
2807
datetime.timedelta(days=1),
2808
frozenset((token_time, token_end)))
2809
token_month = Token(re.compile(r"(\d+)M"),
2810
datetime.timedelta(weeks=4),
2811
frozenset((token_day, token_end)))
2812
token_year = Token(re.compile(r"(\d+)Y"),
2813
datetime.timedelta(weeks=52),
2814
frozenset((token_month, token_end)))
2815
token_week = Token(re.compile(r"(\d+)W"),
2816
datetime.timedelta(weeks=1),
2817
frozenset((token_end, )))
2818
token_duration = Token(re.compile(r"P"), None,
2819
frozenset((token_year, token_month,
2820
token_day, token_time,
2821
token_week)))
2822
# Define starting values:
2823
# Value so far
2824
value = datetime.timedelta()
2825
found_token = None
2826
# Following valid tokens
2827
followers = frozenset((token_duration, ))
2828
# String left to parse
2829
s = duration
2830
# Loop until end token is found
2831
while found_token is not token_end:
2832
# Search for any currently valid tokens
2833
for token in followers:
2834
match = token.regexp.match(s)
2835
if match is not None:
2836
# Token found
2837
if token.value is not None:
2838
# Value found, parse digits
2839
factor = int(match.group(1), 10)
2840
# Add to value so far
2841
value += factor * token.value
2842
# Strip token from string
2843
s = token.regexp.sub("", s, 1)
2844
# Go to found token
2845
found_token = token
2846
# Set valid next tokens
2847
followers = found_token.followers
2848
break
2849
else:
2850
# No currently valid tokens were found
2851
raise ValueError("Invalid RFC 3339 duration: {!r}"
2852
.format(duration))
2853
# End token found
2854
return value
2855
2856
2857
1583
def string_to_delta(interval):
2858
1584
"""Parse a string and return a datetime.timedelta
2859
1585
2860
1586
>>> string_to_delta('7d')
2861
1587
datetime.timedelta(7)
2862
1588
>>> string_to_delta('60s')
2870
1596
>>> string_to_delta('5m 30s')
2871
1597
datetime.timedelta(0, 330)
2872
1598
"""
2873
2874
try:
2875
return rfc3339_duration_to_delta(interval)
2876
except ValueError:
2877
pass
2878
2879
1599
timevalue = datetime.timedelta(0)
2880
1600
for s in interval.split():
2881
1601
try:
2882
suffix = s[-1]
1602
suffix = unicode(s[-1])
2883
1603
value = int(s[:-1])
2884
1604
if suffix == "d":
2885
1605
delta = datetime.timedelta(value)
2892
1612
elif suffix == "w":
2893
1613
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2894
1614
else:
2895
raise ValueError("Unknown suffix {!r}".format(suffix))
2896
except IndexError as e:
1615
raise ValueError("Unknown suffix %r" % suffix)
1616
except (ValueError, IndexError), e:
2897
1617
raise ValueError(*(e.args))
2898
1618
timevalue += delta
2899
1619
return timevalue
2900
1620
2901
1621
2902
def daemon(nochdir=False, noclose=False):
1622
def if_nametoindex(interface):
1623
"""Call the C function if_nametoindex(), or equivalent
1624
1625
Note: This function cannot accept a unicode string."""
1626
global if_nametoindex
1627
try:
1628
if_nametoindex = (ctypes.cdll.LoadLibrary
1629
(ctypes.util.find_library("c"))
1630
.if_nametoindex)
1631
except (OSError, AttributeError):
1632
logger.warning("Doing if_nametoindex the hard way")
1633
def if_nametoindex(interface):
1634
"Get an interface index the hard way, i.e. using fcntl()"
1635
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1636
with contextlib.closing(socket.socket()) as s:
1637
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1638
struct.pack(str("16s16x"),
1639
interface))
1640
interface_index = struct.unpack(str("I"),
1641
ifreq[16:20])[0]
1642
return interface_index
1643
return if_nametoindex(interface)
1644
1645
1646
def daemon(nochdir = False, noclose = False):
2903
1647
"""See daemon(3). Standard BSD Unix function.
2904
1648
2905
1649
This should really exist as os.daemon, but it doesn't (yet)."""
2906
1650
if os.fork():
2907
1651
sys.exit()
2912
1656
sys.exit()
2913
1657
if not noclose:
2914
1658
# Close all standard open file descriptors
2915
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1659
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2916
1660
if not stat.S_ISCHR(os.fstat(null).st_mode):
2917
1661
raise OSError(errno.ENODEV,
2918
"{} not a character device"
2919
.format(os.devnull))
1662
"%s not a character device"
1663
% os.path.devnull)
2920
1664
os.dup2(null, sys.stdin.fileno())
2921
1665
os.dup2(null, sys.stdout.fileno())
2922
1666
os.dup2(null, sys.stderr.fileno())
2925
1669
2926
1670
2927
1671
def main():
2928
1672
2929
1673
##################################################################
2930
1674
# Parsing of options, both command line and config file
2931
2932
parser = argparse.ArgumentParser()
2933
parser.add_argument("-v", "--version", action="version",
2934
version="%(prog)s {}".format(version),
2935
help="show version number and exit")
2936
parser.add_argument("-i", "--interface", metavar="IF",
2937
help="Bind to interface IF")
2938
parser.add_argument("-a", "--address",
2939
help="Address to listen for requests on")
2940
parser.add_argument("-p", "--port", type=int,
2941
help="Port number to receive requests on")
2942
parser.add_argument("--check", action="store_true",
2943
help="Run self-test")
2944
parser.add_argument("--debug", action="store_true",
2945
help="Debug mode; run in foreground and log"
2946
" to terminal", default=None)
2947
parser.add_argument("--debuglevel", metavar="LEVEL",
2948
help="Debug level for stdout output")
2949
parser.add_argument("--priority", help="GnuTLS"
2950
" priority string (see GnuTLS documentation)")
2951
parser.add_argument("--servicename",
2952
metavar="NAME", help="Zeroconf service name")
2953
parser.add_argument("--configdir",
2954
default="/etc/mandos", metavar="DIR",
2955
help="Directory to search for configuration"
2956
" files")
2957
parser.add_argument("--no-dbus", action="store_false",
2958
dest="use_dbus", help="Do not provide D-Bus"
2959
" system bus interface", default=None)
2960
parser.add_argument("--no-ipv6", action="store_false",
2961
dest="use_ipv6", help="Do not use IPv6",
2962
default=None)
2963
parser.add_argument("--no-restore", action="store_false",
2964
dest="restore", help="Do not restore stored"
2965
" state", default=None)
2966
parser.add_argument("--socket", type=int,
2967
help="Specify a file descriptor to a network"
2968
" socket to use instead of creating one")
2969
parser.add_argument("--statedir", metavar="DIR",
2970
help="Directory to save/restore state in")
2971
parser.add_argument("--foreground", action="store_true",
2972
help="Run in foreground", default=None)
2973
parser.add_argument("--no-zeroconf", action="store_false",
2974
dest="zeroconf", help="Do not use Zeroconf",
2975
default=None)
2976
2977
options = parser.parse_args()
2978
1675
1676
parser = optparse.OptionParser(version = "%%prog %s" % version)
1677
parser.add_option("-i", "--interface", type="string",
1678
metavar="IF", help="Bind to interface IF")
1679
parser.add_option("-a", "--address", type="string",
1680
help="Address to listen for requests on")
1681
parser.add_option("-p", "--port", type="int",
1682
help="Port number to receive requests on")
1683
parser.add_option("--check", action="store_true",
1684
help="Run self-test")
1685
parser.add_option("--debug", action="store_true",
1686
help="Debug mode; run in foreground and log to"
1687
" terminal")
1688
parser.add_option("--debuglevel", type="string", metavar="LEVEL",
1689
help="Debug level for stdout output")
1690
parser.add_option("--priority", type="string", help="GnuTLS"
1691
" priority string (see GnuTLS documentation)")
1692
parser.add_option("--servicename", type="string",
1693
metavar="NAME", help="Zeroconf service name")
1694
parser.add_option("--configdir", type="string",
1695
default="/etc/mandos", metavar="DIR",
1696
help="Directory to search for configuration"
1697
" files")
1698
parser.add_option("--no-dbus", action="store_false",
1699
dest="use_dbus", help="Do not provide D-Bus"
1700
" system bus interface")
1701
parser.add_option("--no-ipv6", action="store_false",
1702
dest="use_ipv6", help="Do not use IPv6")
1703
options = parser.parse_args()[0]
1704
2979
1705
if options.check:
2980
1706
import doctest
2981
fail_count, test_count = doctest.testmod()
2982
sys.exit(os.EX_OK if fail_count == 0 else 1)
2983
1707
doctest.testmod()
1708
sys.exit()
1709
2984
1710
# Default values for config file for server-global settings
2985
if gnutls.has_rawpk:
2986
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2987
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2988
else:
2989
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2990
":+SIGN-DSA-SHA256")
2991
server_defaults = {"interface": "",
2992
"address": "",
2993
"port": "",
2994
"debug": "False",
2995
"priority": priority,
2996
"servicename": "Mandos",
2997
"use_dbus": "True",
2998
"use_ipv6": "True",
2999
"debuglevel": "",
3000
"restore": "True",
3001
"socket": "",
3002
"statedir": "/var/lib/mandos",
3003
"foreground": "False",
3004
"zeroconf": "True",
3005
}
3006
del priority
3007
1711
server_defaults = { "interface": "",
1712
"address": "",
1713
"port": "",
1714
"debug": "False",
1715
"priority":
1716
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1717
"servicename": "Mandos",
1718
"use_dbus": "True",
1719
"use_ipv6": "True",
1720
"debuglevel": "",
1721
}
1722
3008
1723
# Parse config file for server-global settings
3009
1724
server_config = configparser.SafeConfigParser(server_defaults)
3010
1725
del server_defaults
3011
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1726
server_config.read(os.path.join(options.configdir,
1727
"mandos.conf"))
3012
1728
# Convert the SafeConfigParser object to a dict
3013
1729
server_settings = server_config.defaults()
3014
1730
# Use the appropriate methods on the non-string config options
3015
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3016
"foreground", "zeroconf"):
1731
for option in ("debug", "use_dbus", "use_ipv6"):
3017
1732
server_settings[option] = server_config.getboolean("DEFAULT",
3018
1733
option)
3019
1734
if server_settings["port"]:
3020
1735
server_settings["port"] = server_config.getint("DEFAULT",
3021
1736
"port")
3022
if server_settings["socket"]:
3023
server_settings["socket"] = server_config.getint("DEFAULT",
3024
"socket")
3025
# Later, stdin will, and stdout and stderr might, be dup'ed
3026
# over with an opened os.devnull. But we don't want this to
3027
# happen with a supplied network socket.
3028
if 0 <= server_settings["socket"] <= 2:
3029
server_settings["socket"] = os.dup(server_settings
3030
["socket"])
3031
1737
del server_config
3032
1738
3033
1739
# Override the settings from the config file with command line
3034
1740
# options, if set.
3035
1741
for option in ("interface", "address", "port", "debug",
3036
"priority", "servicename", "configdir", "use_dbus",
3037
"use_ipv6", "debuglevel", "restore", "statedir",
3038
"socket", "foreground", "zeroconf"):
1742
"priority", "servicename", "configdir",
1743
"use_dbus", "use_ipv6", "debuglevel"):
3039
1744
value = getattr(options, option)
3040
1745
if value is not None:
3041
1746
server_settings[option] = value
3042
1747
del options
3043
1748
# Force all strings to be unicode
3044
1749
for option in server_settings.keys():
3045
if isinstance(server_settings[option], bytes):
3046
server_settings[option] = (server_settings[option]
3047
.decode("utf-8"))
3048
# Force all boolean options to be boolean
3049
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3050
"foreground", "zeroconf"):
3051
server_settings[option] = bool(server_settings[option])
3052
# Debug implies foreground
3053
if server_settings["debug"]:
3054
server_settings["foreground"] = True
1750
if type(server_settings[option]) is str:
1751
server_settings[option] = unicode(server_settings[option])
3055
1752
# Now we have our good server settings in "server_settings"
3056
1753
3057
1754
##################################################################
3058
3059
if (not server_settings["zeroconf"]
3060
and not (server_settings["port"]
3061
or server_settings["socket"] != "")):
3062
parser.error("Needs port or socket to work without Zeroconf")
3063
1755
3064
1756
# For convenience
3065
1757
debug = server_settings["debug"]
3066
1758
debuglevel = server_settings["debuglevel"]
3067
1759
use_dbus = server_settings["use_dbus"]
3068
1760
use_ipv6 = server_settings["use_ipv6"]
3069
stored_state_path = os.path.join(server_settings["statedir"],
3070
stored_state_file)
3071
foreground = server_settings["foreground"]
3072
zeroconf = server_settings["zeroconf"]
3073
3074
if debug:
3075
initlogger(debug, logging.DEBUG)
3076
else:
3077
if not debuglevel:
3078
initlogger(debug)
3079
else:
3080
level = getattr(logging, debuglevel.upper())
3081
initlogger(debug, level)
3082
1761
3083
1762
if server_settings["servicename"] != "Mandos":
3084
syslogger.setFormatter(
3085
logging.Formatter('Mandos ({}) [%(process)d]:'
3086
' %(levelname)s: %(message)s'.format(
3087
server_settings["servicename"])))
3088
1763
syslogger.setFormatter(logging.Formatter
1764
('Mandos (%s) [%%(process)d]:'
1765
' %%(levelname)s: %%(message)s'
1766
% server_settings["servicename"]))
1767
3089
1768
# Parse config file with clients
3090
client_config = configparser.SafeConfigParser(Client
3091
.client_defaults)
1769
client_defaults = { "timeout": "1h",
1770
"interval": "5m",
1771
"checker": "fping -q -- %%(host)s",
1772
"host": "",
1773
"approval_delay": "0s",
1774
"approval_duration": "1s",
1775
}
1776
client_config = configparser.SafeConfigParser(client_defaults)
3092
1777
client_config.read(os.path.join(server_settings["configdir"],
3093
1778
"clients.conf"))
3094
1779
3095
1780
global mandos_dbus_service
3096
1781
mandos_dbus_service = None
3097
3098
socketfd = None
3099
if server_settings["socket"] != "":
3100
socketfd = server_settings["socket"]
3101
tcp_server = MandosServer(
3102
(server_settings["address"], server_settings["port"]),
3103
ClientHandler,
3104
interface=(server_settings["interface"] or None),
3105
use_ipv6=use_ipv6,
3106
gnutls_priority=server_settings["priority"],
3107
use_dbus=use_dbus,
3108
socketfd=socketfd)
3109
if not foreground:
3110
pidfilename = "/run/mandos.pid"
3111
if not os.path.isdir("/run/."):
3112
pidfilename = "/var/run/mandos.pid"
3113
pidfile = None
3114
try:
3115
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3116
except IOError as e:
3117
logger.error("Could not open file %r", pidfilename,
3118
exc_info=e)
3119
3120
for name, group in (("_mandos", "_mandos"),
3121
("mandos", "mandos"),
3122
("nobody", "nogroup")):
3123
try:
3124
uid = pwd.getpwnam(name).pw_uid
3125
gid = pwd.getpwnam(group).pw_gid
3126
break
1782
1783
tcp_server = MandosServer((server_settings["address"],
1784
server_settings["port"]),
1785
ClientHandler,
1786
interface=(server_settings["interface"]
1787
or None),
1788
use_ipv6=use_ipv6,
1789
gnutls_priority=
1790
server_settings["priority"],
1791
use_dbus=use_dbus)
1792
if not debug:
1793
pidfilename = "/var/run/mandos.pid"
1794
try:
1795
pidfile = open(pidfilename, "w")
1796
except IOError:
1797
logger.error("Could not open file %r", pidfilename)
1798
1799
try:
1800
uid = pwd.getpwnam("_mandos").pw_uid
1801
gid = pwd.getpwnam("_mandos").pw_gid
1802
except KeyError:
1803
try:
1804
uid = pwd.getpwnam("mandos").pw_uid
1805
gid = pwd.getpwnam("mandos").pw_gid
3127
1806
except KeyError:
3128
continue
3129
else:
3130
uid = 65534
3131
gid = 65534
1807
try:
1808
uid = pwd.getpwnam("nobody").pw_uid
1809
gid = pwd.getpwnam("nobody").pw_gid
1810
except KeyError:
1811
uid = 65534
1812
gid = 65534
3132
1813
try:
3133
1814
os.setgid(gid)
3134
1815
os.setuid(uid)
3135
if debug:
3136
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3137
gid))
3138
except OSError as error:
3139
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3140
.format(uid, gid, os.strerror(error.errno)))
3141
if error.errno != errno.EPERM:
3142
raise
1816
except OSError, error:
1817
if error[0] != errno.EPERM:
1818
raise error
1819
1820
if not debug and not debuglevel:
1821
syslogger.setLevel(logging.WARNING)
1822
console.setLevel(logging.WARNING)
1823
if debuglevel:
1824
level = getattr(logging, debuglevel.upper())
1825
syslogger.setLevel(level)
1826
console.setLevel(level)
3143
1827
3144
1828
if debug:
3145
1829
# Enable all possible GnuTLS debugging
3146
1830
3147
1831
# "Use a log level over 10 to enable all debugging options."
3148
1832
# - GnuTLS manual
3149
gnutls.global_set_log_level(11)
3150
3151
@gnutls.log_func
1833
gnutls.library.functions.gnutls_global_set_log_level(11)
1834
1835
@gnutls.library.types.gnutls_log_func
3152
1836
def debug_gnutls(level, string):
3153
1837
logger.debug("GnuTLS: %s", string[:-1])
3154
3155
gnutls.global_set_log_function(debug_gnutls)
3156
1838
1839
(gnutls.library.functions
1840
.gnutls_global_set_log_function(debug_gnutls))
1841
3157
1842
# Redirect stdin so all checkers get /dev/null
3158
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1843
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3159
1844
os.dup2(null, sys.stdin.fileno())
3160
1845
if null > 2:
3161
1846
os.close(null)
3162
1847
else:
1848
# No console logging
1849
logger.removeHandler(console)
1850
3163
1851
# Need to fork before connecting to D-Bus
3164
if not foreground:
1852
if not debug:
3165
1853
# Close all input and output, do double fork, etc.
3166
1854
daemon()
3167
3168
# multiprocessing will use threads, so before we use GLib we need
3169
# to inform GLib that threads will be used.
3170
GLib.threads_init()
3171
1855
3172
1856
global main_loop
3173
1857
# From the Avahi example code
3174
DBusGMainLoop(set_as_default=True)
3175
main_loop = GLib.MainLoop()
1858
DBusGMainLoop(set_as_default=True )
1859
main_loop = gobject.MainLoop()
3176
1860
bus = dbus.SystemBus()
3177
1861
# End of Avahi example code
3178
1862
if use_dbus:
3179
1863
try:
3180
bus_name = dbus.service.BusName("se.recompile.Mandos",
3181
bus,
3182
do_not_queue=True)
3183
old_bus_name = dbus.service.BusName(
3184
"se.bsnet.fukt.Mandos", bus,
3185
do_not_queue=True)
3186
except dbus.exceptions.DBusException as e:
3187
logger.error("Disabling D-Bus:", exc_info=e)
1864
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1865
bus, do_not_queue=True)
1866
except dbus.exceptions.NameExistsException, e:
1867
logger.error(unicode(e) + ", disabling D-Bus")
3188
1868
use_dbus = False
3189
1869
server_settings["use_dbus"] = False
3190
1870
tcp_server.use_dbus = False
3191
if zeroconf:
3192
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3193
service = AvahiServiceToSyslog(
3194
name=server_settings["servicename"],
3195
servicetype="_mandos._tcp",
3196
protocol=protocol,
3197
bus=bus)
3198
if server_settings["interface"]:
3199
service.interface = if_nametoindex(
3200
server_settings["interface"].encode("utf-8"))
3201
1871
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1872
service = AvahiService(name = server_settings["servicename"],
1873
servicetype = "_mandos._tcp",
1874
protocol = protocol, bus = bus)
1875
if server_settings["interface"]:
1876
service.interface = (if_nametoindex
1877
(str(server_settings["interface"])))
1878
3202
1879
global multiprocessing_manager
3203
1880
multiprocessing_manager = multiprocessing.Manager()
3204
1881
3205
1882
client_class = Client
3206
1883
if use_dbus:
3207
client_class = functools.partial(ClientDBus, bus=bus)
3208
3209
client_settings = Client.config_parser(client_config)
3210
old_client_settings = {}
3211
clients_data = {}
3212
3213
# This is used to redirect stdout and stderr for checker processes
3214
global wnull
3215
wnull = open(os.devnull, "w") # A writable /dev/null
3216
# Only used if server is running in foreground but not in debug
3217
# mode
3218
if debug or not foreground:
3219
wnull.close()
3220
3221
# Get client data and settings from last running state.
3222
if server_settings["restore"]:
3223
try:
3224
with open(stored_state_path, "rb") as stored_state:
3225
if sys.version_info.major == 2:
3226
clients_data, old_client_settings = pickle.load(
3227
stored_state)
3228
else:
3229
bytes_clients_data, bytes_old_client_settings = (
3230
pickle.load(stored_state, encoding="bytes"))
3231
# Fix bytes to strings
3232
# clients_data
3233
# .keys()
3234
clients_data = {(key.decode("utf-8")
3235
if isinstance(key, bytes)
3236
else key): value
3237
for key, value in
3238
bytes_clients_data.items()}
3239
del bytes_clients_data
3240
for key in clients_data:
3241
value = {(k.decode("utf-8")
3242
if isinstance(k, bytes) else k): v
3243
for k, v in
3244
clients_data[key].items()}
3245
clients_data[key] = value
3246
# .client_structure
3247
value["client_structure"] = [
3248
(s.decode("utf-8")
3249
if isinstance(s, bytes)
3250
else s) for s in
3251
value["client_structure"]]
3252
# .name & .host
3253
for k in ("name", "host"):
3254
if isinstance(value[k], bytes):
3255
value[k] = value[k].decode("utf-8")
3256
if not value.has_key("key_id"):
3257
value["key_id"] = ""
3258
elif not value.has_key("fingerprint"):
3259
value["fingerprint"] = ""
3260
# old_client_settings
3261
# .keys()
3262
old_client_settings = {
3263
(key.decode("utf-8")
3264
if isinstance(key, bytes)
3265
else key): value
3266
for key, value in
3267
bytes_old_client_settings.items()}
3268
del bytes_old_client_settings
3269
# .host
3270
for value in old_client_settings.values():
3271
if isinstance(value["host"], bytes):
3272
value["host"] = (value["host"]
3273
.decode("utf-8"))
3274
os.remove(stored_state_path)
3275
except IOError as e:
3276
if e.errno == errno.ENOENT:
3277
logger.warning("Could not load persistent state:"
3278
" {}".format(os.strerror(e.errno)))
3279
else:
3280
logger.critical("Could not load persistent state:",
3281
exc_info=e)
3282
raise
3283
except EOFError as e:
3284
logger.warning("Could not load persistent state: "
3285
"EOFError:",
3286
exc_info=e)
3287
3288
with PGPEngine() as pgp:
3289
for client_name, client in clients_data.items():
3290
# Skip removed clients
3291
if client_name not in client_settings:
3292
continue
3293
3294
# Decide which value to use after restoring saved state.
3295
# We have three different values: Old config file,
3296
# new config file, and saved state.
3297
# New config value takes precedence if it differs from old
3298
# config value, otherwise use saved state.
3299
for name, value in client_settings[client_name].items():
3300
try:
3301
# For each value in new config, check if it
3302
# differs from the old config value (Except for
3303
# the "secret" attribute)
3304
if (name != "secret"
3305
and (value !=
3306
old_client_settings[client_name][name])):
3307
client[name] = value
3308
except KeyError:
3309
pass
3310
3311
# Clients who has passed its expire date can still be
3312
# enabled if its last checker was successful. A Client
3313
# whose checker succeeded before we stored its state is
3314
# assumed to have successfully run all checkers during
3315
# downtime.
3316
if client["enabled"]:
3317
if datetime.datetime.utcnow() >= client["expires"]:
3318
if not client["last_checked_ok"]:
3319
logger.warning(
3320
"disabling client {} - Client never "
3321
"performed a successful checker".format(
3322
client_name))
3323
client["enabled"] = False
3324
elif client["last_checker_status"] != 0:
3325
logger.warning(
3326
"disabling client {} - Client last"
3327
" checker failed with error code"
3328
" {}".format(
3329
client_name,
3330
client["last_checker_status"]))
3331
client["enabled"] = False
3332
else:
3333
client["expires"] = (
3334
datetime.datetime.utcnow()
3335
+ client["timeout"])
3336
logger.debug("Last checker succeeded,"
3337
" keeping {} enabled".format(
3338
client_name))
1884
client_class = functools.partial(ClientDBus, bus = bus)
1885
def client_config_items(config, section):
1886
special_settings = {
1887
"approved_by_default":
1888
lambda: config.getboolean(section,
1889
"approved_by_default"),
1890
}
1891
for name, value in config.items(section):
3339
1892
try:
3340
client["secret"] = pgp.decrypt(
3341
client["encrypted_secret"],
3342
client_settings[client_name]["secret"])
3343
except PGPError:
3344
# If decryption fails, we use secret from new settings
3345
logger.debug("Failed to decrypt {} old secret".format(
3346
client_name))
3347
client["secret"] = (client_settings[client_name]
3348
["secret"])
3349
3350
# Add/remove clients based on new changes made to config
3351
for client_name in (set(old_client_settings)
3352
- set(client_settings)):
3353
del clients_data[client_name]
3354
for client_name in (set(client_settings)
3355
- set(old_client_settings)):
3356
clients_data[client_name] = client_settings[client_name]
3357
3358
# Create all client objects
3359
for client_name, client in clients_data.items():
3360
tcp_server.clients[client_name] = client_class(
3361
name=client_name,
3362
settings=client,
3363
server_settings=server_settings)
3364
1893
yield (name, special_settings[name]())
1894
except KeyError:
1895
yield (name, value)
1896
1897
tcp_server.clients.update(set(
1898
client_class(name = section,
1899
config= dict(client_config_items(
1900
client_config, section)))
1901
for section in client_config.sections()))
3365
1902
if not tcp_server.clients:
3366
1903
logger.warning("No clients defined")
3367
3368
if not foreground:
3369
if pidfile is not None:
3370
pid = os.getpid()
3371
try:
3372
with pidfile:
3373
print(pid, file=pidfile)
3374
except IOError:
3375
logger.error("Could not write to file %r with PID %d",
3376
pidfilename, pid)
3377
del pidfile
1904
1905
if not debug:
1906
try:
1907
with pidfile:
1908
pid = os.getpid()
1909
pidfile.write(str(pid) + "\n".encode("utf-8"))
1910
del pidfile
1911
except IOError:
1912
logger.error("Could not write to file %r with PID %d",
1913
pidfilename, pid)
1914
except NameError:
1915
# "pidfile" was never created
1916
pass
3378
1917
del pidfilename
3379
3380
for termsig in (signal.SIGHUP, signal.SIGTERM):
3381
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3382
lambda: main_loop.quit() and False)
3383
1918
1919
signal.signal(signal.SIGINT, signal.SIG_IGN)
1920
1921
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1922
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1923
3384
1924
if use_dbus:
3385
3386
@alternate_dbus_interfaces(
3387
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3388
class MandosDBusService(DBusObjectWithObjectManager):
1925
class MandosDBusService(dbus.service.Object):
3389
1926
"""A D-Bus proxy object"""
3390
3391
1927
def __init__(self):
3392
1928
dbus.service.Object.__init__(self, bus, "/")
3393
3394
_interface = "se.recompile.Mandos"
3395
1929
_interface = "se.bsnet.fukt.Mandos"
1930
3396
1931
@dbus.service.signal(_interface, signature="o")
3397
1932
def ClientAdded(self, objpath):
3398
1933
"D-Bus signal"
3399
1934
pass
3400
1935
3401
1936
@dbus.service.signal(_interface, signature="ss")
3402
def ClientNotFound(self, key_id, address):
1937
def ClientNotFound(self, fingerprint, address):
3403
1938
"D-Bus signal"
3404
1939
pass
3405
3406
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3407
"true"})
1940
3408
1941
@dbus.service.signal(_interface, signature="os")
3409
1942
def ClientRemoved(self, objpath, name):
3410
1943
"D-Bus signal"
3411
1944
pass
3412
3413
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3414
"true"})
1945
3415
1946
@dbus.service.method(_interface, out_signature="ao")
3416
1947
def GetAllClients(self):
3417
1948
"D-Bus method"
3418
return dbus.Array(c.dbus_object_path for c in
3419
tcp_server.clients.values())
3420
3421
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3422
"true"})
1949
return dbus.Array(c.dbus_object_path
1950
for c in tcp_server.clients)
1951
3423
1952
@dbus.service.method(_interface,
3424
1953
out_signature="a{oa{sv}}")
3425
1954
def GetAllClientsWithProperties(self):
3426
1955
"D-Bus method"
3427
1956
return dbus.Dictionary(
3428
{c.dbus_object_path: c.GetAll(
3429
"se.recompile.Mandos.Client")
3430
for c in tcp_server.clients.values()},
1957
((c.dbus_object_path, c.GetAll(""))
1958
for c in tcp_server.clients),
3431
1959
signature="oa{sv}")
3432
1960
3433
1961
@dbus.service.method(_interface, in_signature="o")
3434
1962
def RemoveClient(self, object_path):
3435
1963
"D-Bus method"
3436
for c in tcp_server.clients.values():
1964
for c in tcp_server.clients:
3437
1965
if c.dbus_object_path == object_path:
3438
del tcp_server.clients[c.name]
1966
tcp_server.clients.remove(c)
3439
1967
c.remove_from_connection()
3440
# Don't signal the disabling
1968
# Don't signal anything except ClientRemoved
3441
1969
c.disable(quiet=True)
3442
# Emit D-Bus signal for removal
3443
self.client_removed_signal(c)
1970
# Emit D-Bus signal
1971
self.ClientRemoved(object_path, c.name)
3444
1972
return
3445
1973
raise KeyError(object_path)
3446
1974
3447
1975
del _interface
3448
3449
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3450
out_signature="a{oa{sa{sv}}}")
3451
def GetManagedObjects(self):
3452
"""D-Bus method"""
3453
return dbus.Dictionary(
3454
{client.dbus_object_path:
3455
dbus.Dictionary(
3456
{interface: client.GetAll(interface)
3457
for interface in
3458
client._get_all_interface_names()})
3459
for client in tcp_server.clients.values()})
3460
3461
def client_added_signal(self, client):
3462
"""Send the new standard signal and the old signal"""
3463
if use_dbus:
3464
# New standard signal
3465
self.InterfacesAdded(
3466
client.dbus_object_path,
3467
dbus.Dictionary(
3468
{interface: client.GetAll(interface)
3469
for interface in
3470
client._get_all_interface_names()}))
3471
# Old signal
3472
self.ClientAdded(client.dbus_object_path)
3473
3474
def client_removed_signal(self, client):
3475
"""Send the new standard signal and the old signal"""
3476
if use_dbus:
3477
# New standard signal
3478
self.InterfacesRemoved(
3479
client.dbus_object_path,
3480
client._get_all_interface_names())
3481
# Old signal
3482
self.ClientRemoved(client.dbus_object_path,
3483
client.name)
3484
1976
3485
1977
mandos_dbus_service = MandosDBusService()
3486
3487
# Save modules to variables to exempt the modules from being
3488
# unloaded before the function registered with atexit() is run.
3489
mp = multiprocessing
3490
wn = wnull
3491
1978
3492
1979
def cleanup():
3493
1980
"Cleanup function; run on exit"
3494
if zeroconf:
3495
service.cleanup()
3496
3497
mp.active_children()
3498
wn.close()
3499
if not (tcp_server.clients or client_settings):
3500
return
3501
3502
# Store client before exiting. Secrets are encrypted with key
3503
# based on what config file has. If config file is
3504
# removed/edited, old secret will thus be unrecovable.
3505
clients = {}
3506
with PGPEngine() as pgp:
3507
for client in tcp_server.clients.values():
3508
key = client_settings[client.name]["secret"]
3509
client.encrypted_secret = pgp.encrypt(client.secret,
3510
key)
3511
client_dict = {}
3512
3513
# A list of attributes that can not be pickled
3514
# + secret.
3515
exclude = {"bus", "changedstate", "secret",
3516
"checker", "server_settings"}
3517
for name, typ in inspect.getmembers(dbus.service
3518
.Object):
3519
exclude.add(name)
3520
3521
client_dict["encrypted_secret"] = (client
3522
.encrypted_secret)
3523
for attr in client.client_structure:
3524
if attr not in exclude:
3525
client_dict[attr] = getattr(client, attr)
3526
3527
clients[client.name] = client_dict
3528
del client_settings[client.name]["secret"]
3529
3530
try:
3531
with tempfile.NamedTemporaryFile(
3532
mode='wb',
3533
suffix=".pickle",
3534
prefix='clients-',
3535
dir=os.path.dirname(stored_state_path),
3536
delete=False) as stored_state:
3537
pickle.dump((clients, client_settings), stored_state,
3538
protocol=2)
3539
tempname = stored_state.name
3540
os.rename(tempname, stored_state_path)
3541
except (IOError, OSError) as e:
3542
if not debug:
3543
try:
3544
os.remove(tempname)
3545
except NameError:
3546
pass
3547
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3548
logger.warning("Could not save persistent state: {}"
3549
.format(os.strerror(e.errno)))
3550
else:
3551
logger.warning("Could not save persistent state:",
3552
exc_info=e)
3553
raise
3554
3555
# Delete all clients, and settings from config
1981
service.cleanup()
1982
3556
1983
while tcp_server.clients:
3557
name, client = tcp_server.clients.popitem()
1984
client = tcp_server.clients.pop()
3558
1985
if use_dbus:
3559
1986
client.remove_from_connection()
3560
# Don't signal the disabling
1987
client.disable_hook = None
1988
# Don't signal anything except ClientRemoved
3561
1989
client.disable(quiet=True)
3562
# Emit D-Bus signal for removal
3563
1990
if use_dbus:
3564
mandos_dbus_service.client_removed_signal(client)
3565
client_settings.clear()
3566
1991
# Emit D-Bus signal
1992
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1993
client.name)
1994
3567
1995
atexit.register(cleanup)
3568
3569
for client in tcp_server.clients.values():
1996
1997
for client in tcp_server.clients:
3570
1998
if use_dbus:
3571
# Emit D-Bus signal for adding
3572
mandos_dbus_service.client_added_signal(client)
3573
# Need to initiate checking of clients
3574
if client.enabled:
3575
client.init_checker()
3576
1999
# Emit D-Bus signal
2000
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2001
client.enable()
2002
3577
2003
tcp_server.enable()
3578
2004
tcp_server.server_activate()
3579
2005
3580
2006
# Find out what port we got
3581
if zeroconf:
3582
service.port = tcp_server.socket.getsockname()[1]
2007
service.port = tcp_server.socket.getsockname()[1]
3583
2008
if use_ipv6:
3584
2009
logger.info("Now listening on address %r, port %d,"
3585
" flowinfo %d, scope_id %d",
3586
*tcp_server.socket.getsockname())
2010
" flowinfo %d, scope_id %d"
2011
% tcp_server.socket.getsockname())
3587
2012
else: # IPv4
3588
logger.info("Now listening on address %r, port %d",
3589
*tcp_server.socket.getsockname())
3590
3591
# service.interface = tcp_server.socket.getsockname()[3]
3592
2013
logger.info("Now listening on address %r, port %d"
2014
% tcp_server.socket.getsockname())
2015
2016
#service.interface = tcp_server.socket.getsockname()[3]
2017
3593
2018
try:
3594
if zeroconf:
3595
# From the Avahi example code
3596
try:
3597
service.activate()
3598
except dbus.exceptions.DBusException as error:
3599
logger.critical("D-Bus Exception", exc_info=error)
3600
cleanup()
3601
sys.exit(1)
3602
# End of Avahi example code
3603
3604
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3605
lambda *args, **kwargs:
3606
(tcp_server.handle_request
3607
(*args[2:], **kwargs) or True))
3608
2019
# From the Avahi example code
2020
try:
2021
service.activate()
2022
except dbus.exceptions.DBusException, error:
2023
logger.critical("DBusException: %s", error)
2024
cleanup()
2025
sys.exit(1)
2026
# End of Avahi example code
2027
2028
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2029
lambda *args, **kwargs:
2030
(tcp_server.handle_request
2031
(*args[2:], **kwargs) or True))
2032
3609
2033
logger.debug("Starting main loop")
3610
2034
main_loop.run()
3611
except AvahiError as error:
3612
logger.critical("Avahi Error", exc_info=error)
2035
except AvahiError, error:
2036
logger.critical("AvahiError: %s", error)
3613
2037
cleanup()
3614
2038
sys.exit(1)
3615
2039
except KeyboardInterrupt:
3620
2044
# Must run before the D-Bus bus name gets deregistered
3621
2045
cleanup()
3622
2046
3623
3624
2047
if __name__ == '__main__':
3625
2048
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0