To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to mandos
- browse files at revision 548
- compare with another revision
- download diff
- download tarball
- view history from revision 548
- Committer: Teddy Hogeborn
- Date: 2012-01-01 05:42:51 UTC
- mfrom: (237.4.22 release)
- Revision ID: teddy@recompile.se-20120101054251-26jflhej4znq2mzq
Merge from release branch.
- files added:
- initramfs-tools-hook-conf
- files removed:
- bugs.xml
- debian/upstream
- 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 © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 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
#
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
32
31
# Contact the authors at <mandos@recompile.se>.
33
#
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
39
import argparse
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
65
import types
75
66
import binascii
76
67
import tempfile
77
import itertools
78
import collections
79
import codecs
80
68
81
69
import dbus
82
70
import dbus.service
83
from gi.repository import GLib
71
import gobject
72
import avahi
84
73
from dbus.mainloop.glib import DBusGMainLoop
85
74
import ctypes
86
75
import ctypes.util
87
76
import xml.dom.minidom
88
77
import inspect
78
import GnuPGInterface
89
79
90
# Try to find the value of SO_BINDTODEVICE:
91
80
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
81
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
95
82
except AttributeError:
96
83
try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
99
84
from IN import SO_BINDTODEVICE
100
85
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 = "1.8.3"
86
SO_BINDTODEVICE = None
87
88
version = "1.5.0"
119
89
stored_state_file = "clients.pickle"
120
90
121
91
logger = logging.getLogger()
122
syslogger = None
92
syslogger = (logging.handlers.SysLogHandler
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
123
95
124
96
try:
125
if_nametoindex = ctypes.cdll.LoadLibrary(
126
ctypes.util.find_library("c")).if_nametoindex
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
127
100
except (OSError, AttributeError):
128
129
101
def if_nametoindex(interface):
130
102
"Get an interface index the hard way, i.e. using fcntl()"
131
103
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
132
104
with contextlib.closing(socket.socket()) as s:
133
105
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
134
struct.pack(b"16s16x", interface))
135
interface_index = struct.unpack("I", ifreq[16:20])[0]
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
136
110
return interface_index
137
111
138
112
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
113
def initlogger(debug, level=logging.WARNING):
156
114
"""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"))
115
162
116
syslogger.setFormatter(logging.Formatter
163
117
('Mandos [%(process)d]: %(levelname)s:'
164
118
' %(message)s'))
165
119
logger.addHandler(syslogger)
166
120
167
121
if debug:
168
122
console = logging.StreamHandler()
169
123
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
181
135
182
136
class PGPEngine(object):
183
137
"""A simple class for OpenPGP symmetric encryption & decryption"""
184
185
138
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
186
140
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
141
self.gnupg = GnuPGInterface.GnuPG()
142
self.gnupg.options.meta_interactive = False
143
self.gnupg.options.homedir = self.tempdir
144
self.gnupg.options.extra_args.extend(['--force-mdc',
145
'--quiet',
146
'--no-use-agent'])
147
206
148
def __enter__(self):
207
149
return self
208
209
def __exit__(self, exc_type, exc_value, traceback):
150
151
def __exit__ (self, exc_type, exc_value, traceback):
210
152
self._cleanup()
211
153
return False
212
154
213
155
def __del__(self):
214
156
self._cleanup()
215
157
216
158
def _cleanup(self):
217
159
if self.tempdir is not None:
218
160
# Delete contents of tempdir
219
161
for root, dirs, files in os.walk(self.tempdir,
220
topdown=False):
162
topdown = False):
221
163
for filename in files:
222
164
os.remove(os.path.join(root, filename))
223
165
for dirname in dirs:
225
167
# Remove tempdir
226
168
os.rmdir(self.tempdir)
227
169
self.tempdir = None
228
170
229
171
def password_encode(self, password):
230
172
# Passphrase can not be empty and can not contain newlines or
231
173
# 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
174
return b"mandos" + binascii.hexlify(password)
175
240
176
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)
177
self.gnupg.passphrase = self.password_encode(password)
178
with open(os.devnull) as devnull:
179
try:
180
proc = self.gnupg.run(['--symmetric'],
181
create_fhs=['stdin', 'stdout'],
182
attach_fhs={'stderr': devnull})
183
with contextlib.closing(proc.handles['stdin']) as f:
184
f.write(data)
185
with contextlib.closing(proc.handles['stdout']) as f:
186
ciphertext = f.read()
187
proc.wait()
188
except IOError as e:
189
raise PGPError(e)
190
self.gnupg.passphrase = None
256
191
return ciphertext
257
192
258
193
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)
194
self.gnupg.passphrase = self.password_encode(password)
195
with open(os.devnull) as devnull:
196
try:
197
proc = self.gnupg.run(['--decrypt'],
198
create_fhs=['stdin', 'stdout'],
199
attach_fhs={'stderr': devnull})
200
with contextlib.closing(proc.handles['stdin'] ) as f:
201
f.write(data)
202
with contextlib.closing(proc.handles['stdout']) as f:
203
decrypted_plaintext = f.read()
204
proc.wait()
205
except IOError as e:
206
raise PGPError(e)
207
self.gnupg.passphrase = None
274
208
return decrypted_plaintext
275
209
276
210
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
303
211
304
212
class AvahiError(Exception):
305
213
def __init__(self, value, *args, **kwargs):
306
214
self.value = value
307
return super(AvahiError, self).__init__(value, *args,
308
**kwargs)
309
215
super(AvahiError, self).__init__(value, *args, **kwargs)
216
def __unicode__(self):
217
return unicode(repr(self.value))
310
218
311
219
class AvahiServiceError(AvahiError):
312
220
pass
313
221
314
315
222
class AvahiGroupError(AvahiError):
316
223
pass
317
224
318
225
319
226
class AvahiService(object):
320
227
"""An Avahi (Zeroconf) service.
321
228
322
229
Attributes:
323
230
interface: integer; avahi.IF_UNSPEC or an interface index.
324
231
Used to optionally bind to the specified interface.
325
232
name: string; Example: 'Mandos'
326
233
type: string; Example: '_mandos._tcp'.
327
See <https://www.iana.org/assignments/service-names-port-numbers>
234
See <http://www.dns-sd.org/ServiceTypes.html>
328
235
port: integer; what port to announce
329
236
TXT: list of strings; TXT record for the service
330
237
domain: string; Domain to publish on, default to .local if empty.
336
243
server: D-Bus Server
337
244
bus: dbus.SystemBus()
338
245
"""
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):
246
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
247
servicetype = None, port = None, TXT = None,
248
domain = "", host = "", max_renames = 32768,
249
protocol = avahi.PROTO_UNSPEC, bus = None):
351
250
self.interface = interface
352
251
self.name = name
353
252
self.type = servicetype
362
261
self.server = None
363
262
self.bus = bus
364
263
self.entry_group_state_changed_match = None
365
366
def rename(self, remove=True):
264
def rename(self):
367
265
"""Derived from the Avahi example code"""
368
266
if self.rename_count >= self.max_renames:
369
267
logger.critical("No suitable Zeroconf service name found"
370
268
" after %i retries, exiting.",
371
269
self.rename_count)
372
270
raise AvahiServiceError("Too many renames")
373
self.name = str(
374
self.server.GetAlternativeServiceName(self.name))
375
self.rename_count += 1
271
self.name = unicode(self.server
272
.GetAlternativeServiceName(self.name))
376
273
logger.info("Changing Zeroconf service name to %r ...",
377
274
self.name)
378
if remove:
379
self.remove()
275
self.remove()
380
276
try:
381
277
self.add()
382
278
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
279
logger.critical("DBusException: %s", error)
280
self.cleanup()
281
os._exit(1)
282
self.rename_count += 1
392
283
def remove(self):
393
284
"""Derived from the Avahi example code"""
394
285
if self.entry_group_state_changed_match is not None:
396
287
self.entry_group_state_changed_match = None
397
288
if self.group is not None:
398
289
self.group.Reset()
399
400
290
def add(self):
401
291
"""Derived from the Avahi example code"""
402
292
self.remove()
419
309
dbus.UInt16(self.port),
420
310
avahi.string_array_to_txt_array(self.TXT))
421
311
self.group.Commit()
422
423
312
def entry_group_state_changed(self, state, error):
424
313
"""Derived from the Avahi example code"""
425
314
logger.debug("Avahi entry group state change: %i", state)
426
315
427
316
if state == avahi.ENTRY_GROUP_ESTABLISHED:
428
317
logger.debug("Zeroconf service established.")
429
318
elif state == avahi.ENTRY_GROUP_COLLISION:
431
320
self.rename()
432
321
elif state == avahi.ENTRY_GROUP_FAILURE:
433
322
logger.critical("Avahi: Error in group state changed %s",
434
str(error))
435
raise AvahiGroupError("State changed: {!s}".format(error))
436
323
unicode(error))
324
raise AvahiGroupError("State changed: %s"
325
% unicode(error))
437
326
def cleanup(self):
438
327
"""Derived from the Avahi example code"""
439
328
if self.group is not None:
444
333
pass
445
334
self.group = None
446
335
self.remove()
447
448
336
def server_state_changed(self, state, error=None):
449
337
"""Derived from the Avahi example code"""
450
338
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
}
339
bad_states = { avahi.SERVER_INVALID:
340
"Zeroconf server invalid",
341
avahi.SERVER_REGISTERING: None,
342
avahi.SERVER_COLLISION:
343
"Zeroconf server name collision",
344
avahi.SERVER_FAILURE:
345
"Zeroconf server failure" }
457
346
if state in bad_states:
458
347
if bad_states[state] is not None:
459
348
if error is None:
462
351
logger.error(bad_states[state] + ": %r", error)
463
352
self.cleanup()
464
353
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)
354
self.add()
477
355
else:
478
356
if error is None:
479
357
logger.debug("Unknown state: %r", state)
480
358
else:
481
359
logger.debug("Unknown state: %r: %r", state, error)
482
483
360
def activate(self):
484
361
"""Derived from the Avahi example code"""
485
362
if self.server is None:
489
366
follow_name_owner_changes=True),
490
367
avahi.DBUS_INTERFACE_SERVER)
491
368
self.server.connect_to_signal("StateChanged",
492
self.server_state_changed)
369
self.server_state_changed)
493
370
self.server_state_changed(self.server.GetState())
494
371
495
496
372
class AvahiServiceToSyslog(AvahiService):
497
def rename(self, *args, **kwargs):
373
def rename(self):
498
374
"""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)))
375
ret = AvahiService.rename(self)
376
syslogger.setFormatter(logging.Formatter
377
('Mandos (%s) [%%(process)d]:'
378
' %%(levelname)s: %%(message)s'
379
% self.name))
503
380
return ret
504
381
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
382
def timedelta_to_milliseconds(td):
383
"Convert a datetime.timedelta() to milliseconds"
384
return ((td.days * 24 * 60 * 60 * 1000)
385
+ (td.seconds * 1000)
386
+ (td.microseconds // 1000))
387
828
388
class Client(object):
829
389
"""A representation of a client host served by this server.
830
390
831
391
Attributes:
832
392
approved: bool(); 'None' if not yet approved/disapproved
833
393
approval_delay: datetime.timedelta(); Time to wait for approval
835
395
checker: subprocess.Popen(); a running checker process used
836
396
to see if the client lives.
837
397
'None' if no process is running.
838
checker_callback_tag: a GLib event source tag, or None
398
checker_callback_tag: a gobject event source tag, or None
839
399
checker_command: string; External command which is run to check
840
400
if client lives. %() expansions are done at
841
401
runtime with vars(self) as dict, so that for
842
402
instance %(name)s can be used in the command.
843
checker_initiator_tag: a GLib event source tag, or None
403
checker_initiator_tag: a gobject event source tag, or None
844
404
created: datetime.datetime(); (UTC) object creation
845
405
client_structure: Object describing what attributes a client has
846
406
and is used for storing the client at exit
847
407
current_checker_command: string; current running checker_command
848
disable_initiator_tag: a GLib event source tag, or None
408
disable_initiator_tag: a gobject event source tag, or None
849
409
enabled: bool()
850
410
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
411
uniquely identify the client
854
412
host: string; available for use by the checker command
855
413
interval: datetime.timedelta(); How often to start a new checker
856
414
last_approval_request: datetime.datetime(); (UTC) or None
857
415
last_checked_ok: datetime.datetime(); (UTC) or None
858
416
last_checker_status: integer between 0 and 255 reflecting exit
859
417
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
418
checker, or None.
863
419
last_enabled: datetime.datetime(); (UTC) or None
864
420
name: string; from the config file, used in log messages and
865
421
D-Bus identifiers
866
422
secret: bytestring; sent verbatim (over TLS) to client
867
423
timeout: datetime.timedelta(); How long from last_checked_ok
868
424
until this client is disabled
869
extended_timeout: extra long timeout when secret has been sent
425
extended_timeout: extra long timeout when password has been sent
870
426
runtime_expansions: Allowed attributes for runtime expansion.
871
427
expires: datetime.datetime(); time (UTC) when a client will be
872
428
disabled, or None
873
server_settings: The server_settings dict from main()
874
429
"""
875
430
876
431
runtime_expansions = ("approval_delay", "approval_duration",
877
"created", "enabled", "expires", "key_id",
878
"fingerprint", "host", "interval",
879
"last_approval_request", "last_checked_ok",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
880
434
"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
}
435
client_defaults = { "timeout": "5m",
436
"extended_timeout": "15m",
437
"interval": "2m",
438
"checker": "fping -q -- %%(host)s",
439
"host": "",
440
"approval_delay": "0s",
441
"approval_duration": "1s",
442
"approved_by_default": "True",
443
"enabled": "True",
444
}
445
446
def timeout_milliseconds(self):
447
"Return the 'timeout' attribute in milliseconds"
448
return timedelta_to_milliseconds(self.timeout)
449
450
def extended_timeout_milliseconds(self):
451
"Return the 'extended_timeout' attribute in milliseconds"
452
return timedelta_to_milliseconds(self.extended_timeout)
453
454
def interval_milliseconds(self):
455
"Return the 'interval' attribute in milliseconds"
456
return timedelta_to_milliseconds(self.interval)
457
458
def approval_delay_milliseconds(self):
459
return timedelta_to_milliseconds(self.approval_delay)
892
460
893
461
@staticmethod
894
462
def config_parser(config):
902
470
for client_name in config.sections():
903
471
section = dict(config.items(client_name))
904
472
client = settings[client_name] = {}
905
473
906
474
client["host"] = section["host"]
907
475
# Reformat values from string types to Python types
908
476
client["approved_by_default"] = config.getboolean(
909
477
client_name, "approved_by_default")
910
478
client["enabled"] = config.getboolean(client_name,
911
479
"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(" ", ""))
480
918
481
client["fingerprint"] = (section["fingerprint"].upper()
919
482
.replace(" ", ""))
920
483
if "secret" in section:
921
client["secret"] = codecs.decode(section["secret"]
922
.encode("utf-8"),
923
"base64")
484
client["secret"] = section["secret"].decode("base64")
924
485
elif "secfile" in section:
925
486
with open(os.path.expanduser(os.path.expandvars
926
487
(section["secfile"])),
927
488
"rb") as secfile:
928
489
client["secret"] = secfile.read()
929
490
else:
930
raise TypeError("No secret or secfile for section {}"
931
.format(section))
491
raise TypeError("No secret or secfile for section %s"
492
% section)
932
493
client["timeout"] = string_to_delta(section["timeout"])
933
494
client["extended_timeout"] = string_to_delta(
934
495
section["extended_timeout"])
940
501
client["checker_command"] = section["checker"]
941
502
client["last_approval_request"] = None
942
503
client["last_checked_ok"] = None
943
client["last_checker_status"] = -2
944
504
client["last_checker_status"] = None
505
945
506
return settings
946
947
def __init__(self, settings, name=None, server_settings=None):
507
508
509
def __init__(self, settings, name = None):
510
"""Note: the 'checker' key in 'config' sets the
511
'checker_command' attribute and *not* the 'checker'
512
attribute."""
948
513
self.name = name
949
if server_settings is None:
950
server_settings = {}
951
self.server_settings = server_settings
952
514
# adding all client settings
953
for setting, value in settings.items():
515
for setting, value in settings.iteritems():
954
516
setattr(self, setting, value)
955
517
956
518
if self.enabled:
957
519
if not hasattr(self, "last_enabled"):
958
520
self.last_enabled = datetime.datetime.utcnow()
962
524
else:
963
525
self.last_enabled = None
964
526
self.expires = None
965
527
966
528
logger.debug("Creating client %r", self.name)
967
logger.debug(" Key ID: %s", self.key_id)
529
# Uppercase and remove spaces from fingerprint for later
530
# comparison purposes with return value from the fingerprint()
531
# function
968
532
logger.debug(" Fingerprint: %s", self.fingerprint)
969
533
self.created = settings.get("created",
970
534
datetime.datetime.utcnow())
977
541
self.current_checker_command = None
978
542
self.approved = None
979
543
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()
544
self.changedstate = (multiprocessing_manager
545
.Condition(multiprocessing_manager
546
.Lock()))
547
self.client_structure = [attr for attr in
548
self.__dict__.iterkeys()
984
549
if not attr.startswith("_")]
985
550
self.client_structure.append("client_structure")
986
987
for name, t in inspect.getmembers(
988
type(self), lambda obj: isinstance(obj, property)):
551
552
for name, t in inspect.getmembers(type(self),
553
lambda obj:
554
isinstance(obj,
555
property)):
989
556
if not name.startswith("_"):
990
557
self.client_structure.append(name)
991
558
992
559
# Send notice to process children that client state has changed
993
560
def send_changedstate(self):
994
561
with self.changedstate:
995
562
self.changedstate.notify_all()
996
563
997
564
def enable(self):
998
565
"""Start this client's checker and timeout hooks"""
999
566
if getattr(self, "enabled", False):
1000
567
# Already enabled
1001
568
return
569
self.send_changedstate()
1002
570
self.expires = datetime.datetime.utcnow() + self.timeout
1003
571
self.enabled = True
1004
572
self.last_enabled = datetime.datetime.utcnow()
1005
573
self.init_checker()
1006
self.send_changedstate()
1007
574
1008
575
def disable(self, quiet=True):
1009
576
"""Disable this client."""
1010
577
if not getattr(self, "enabled", False):
1011
578
return False
1012
579
if not quiet:
580
self.send_changedstate()
581
if not quiet:
1013
582
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)
583
if getattr(self, "disable_initiator_tag", False):
584
gobject.source_remove(self.disable_initiator_tag)
1016
585
self.disable_initiator_tag = None
1017
586
self.expires = None
1018
if getattr(self, "checker_initiator_tag", None) is not None:
1019
GLib.source_remove(self.checker_initiator_tag)
587
if getattr(self, "checker_initiator_tag", False):
588
gobject.source_remove(self.checker_initiator_tag)
1020
589
self.checker_initiator_tag = None
1021
590
self.stop_checker()
1022
591
self.enabled = False
1023
if not quiet:
1024
self.send_changedstate()
1025
# Do not run this again if called by a GLib.timeout_add
592
# Do not run this again if called by a gobject.timeout_add
1026
593
return False
1027
594
1028
595
def __del__(self):
1029
596
self.disable()
1030
597
1031
598
def init_checker(self):
1032
599
# Schedule a new checker to be started an 'interval' from now,
1033
600
# 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)
601
self.checker_initiator_tag = (gobject.timeout_add
602
(self.interval_milliseconds(),
603
self.start_checker))
1039
604
# 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)
605
self.disable_initiator_tag = (gobject.timeout_add
606
(self.timeout_milliseconds(),
607
self.disable))
1044
608
# Also start a new checker *right now*.
1045
609
self.start_checker()
1046
1047
def checker_callback(self, source, condition, connection,
1048
command):
610
611
def checker_callback(self, pid, condition, command):
1049
612
"""The checker has completed, so take appropriate actions."""
1050
613
self.checker_callback_tag = None
1051
614
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
615
if os.WIFEXITED(condition):
616
self.last_checker_status = os.WEXITSTATUS(condition)
1059
617
if self.last_checker_status == 0:
1060
618
logger.info("Checker for %(name)s succeeded",
1061
619
vars(self))
1062
620
self.checked_ok()
1063
621
else:
1064
logger.info("Checker for %(name)s failed", vars(self))
622
logger.info("Checker for %(name)s failed",
623
vars(self))
1065
624
else:
1066
625
self.last_checker_status = -1
1067
self.last_checker_signal = -returncode
1068
626
logger.warning("Checker for %(name)s crashed?",
1069
627
vars(self))
1070
return False
1071
1072
def checked_ok(self):
1073
"""Assert that the client has been seen, alive and well."""
1074
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."""
628
629
def checked_ok(self, timeout=None):
630
"""Bump up the timeout for this client.
631
632
This should only be called when the client has been seen,
633
alive and well.
634
"""
1081
635
if timeout is None:
1082
636
timeout = self.timeout
637
self.last_checked_ok = datetime.datetime.utcnow()
1083
638
if self.disable_initiator_tag is not None:
1084
GLib.source_remove(self.disable_initiator_tag)
1085
self.disable_initiator_tag = None
639
gobject.source_remove(self.disable_initiator_tag)
1086
640
if getattr(self, "enabled", False):
1087
self.disable_initiator_tag = GLib.timeout_add(
1088
int(timeout.total_seconds() * 1000), self.disable)
641
self.disable_initiator_tag = (gobject.timeout_add
642
(timedelta_to_milliseconds
643
(timeout), self.disable))
1089
644
self.expires = datetime.datetime.utcnow() + timeout
1090
645
1091
646
def need_approval(self):
1092
647
self.last_approval_request = datetime.datetime.utcnow()
1093
648
1094
649
def start_checker(self):
1095
650
"""Start a new checker subprocess if one is not running.
1096
651
1097
652
If a checker already exists, leave it running and do
1098
653
nothing."""
1099
654
# 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
655
# did that, then if a checker (for some reason) started
656
# running slowly and taking more than 'interval' time, the
657
# client would inevitably timeout, since no checker would get
658
# a chance to run to completion. If we instead leave running
1104
659
# checkers alone, the checker would have to take more time
1105
660
# than 'timeout' for the client to be disabled, which is as it
1106
661
# 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
662
663
# If a checker exists, make sure it is not a zombie
664
try:
665
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
666
except (AttributeError, OSError) as error:
667
if (isinstance(error, OSError)
668
and error.errno != errno.ECHILD):
669
raise error
670
else:
671
if pid:
672
logger.warning("Checker was a zombie")
673
gobject.source_remove(self.checker_callback_tag)
674
self.checker_callback(pid, status,
675
self.current_checker_command)
1112
676
# Start a new checker if needed
1113
677
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
678
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
679
# In case checker_command has exactly one % operator
680
command = self.checker_command % self.host
681
except TypeError:
682
# Escape attributes for the shell
683
escaped_attrs = dict(
684
(attr,
685
re.escape(unicode(str(getattr(self, attr, "")),
686
errors=
687
'replace')))
688
for attr in
689
self.runtime_expansions)
690
691
try:
692
command = self.checker_command % escaped_attrs
693
except TypeError as error:
694
logger.error('Could not format string "%s":'
695
' %s', self.checker_command, error)
696
return True # Try again later
1125
697
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
698
try:
699
logger.info("Starting checker %r for %s",
700
command, self.name)
701
# We don't need to redirect stdout and stderr, since
702
# in normal mode, that is already done by daemon(),
703
# and in debug mode we don't want to. (Stdin is
704
# always replaced by /dev/null.)
705
self.checker = subprocess.Popen(command,
706
close_fds=True,
707
shell=True, cwd="/")
708
self.checker_callback_tag = (gobject.child_watch_add
709
(self.checker.pid,
710
self.checker_callback,
711
data=command))
712
# The checker may have completed before the gobject
713
# watch was added. Check for this.
714
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
715
if pid:
716
gobject.source_remove(self.checker_callback_tag)
717
self.checker_callback(pid, status, command)
718
except OSError as error:
719
logger.error("Failed to start subprocess: %s",
720
error)
721
# Re-run this periodically if run by gobject.timeout_add
1152
722
return True
1153
723
1154
724
def stop_checker(self):
1155
725
"""Force the checker process, if any, to stop."""
1156
726
if self.checker_callback_tag:
1157
GLib.source_remove(self.checker_callback_tag)
727
gobject.source_remove(self.checker_callback_tag)
1158
728
self.checker_callback_tag = None
1159
729
if getattr(self, "checker", None) is None:
1160
730
return
1161
731
logger.debug("Stopping checker for %(name)s", vars(self))
1162
self.checker.terminate()
732
try:
733
os.kill(self.checker.pid, signal.SIGTERM)
734
#time.sleep(0.5)
735
#if self.checker.poll() is None:
736
# os.kill(self.checker.pid, signal.SIGKILL)
737
except OSError as error:
738
if error.errno != errno.ESRCH: # No such process
739
raise
1163
740
self.checker = None
1164
741
1165
742
1166
def dbus_service_property(dbus_interface,
1167
signature="v",
1168
access="readwrite",
1169
byte_arrays=False):
743
def dbus_service_property(dbus_interface, signature="v",
744
access="readwrite", byte_arrays=False):
1170
745
"""Decorators for marking methods of a DBusObjectWithProperties to
1171
746
become properties on the D-Bus.
1172
747
1173
748
The decorated method will be called with no arguments by "Get"
1174
749
and with one argument by "Set".
1175
750
1176
751
The parameters, where they are supported, are the same as
1177
752
dbus.service.method, except there is only "signature", since the
1178
753
type from Get() and the type sent to Set() is the same.
1181
756
# "Set" method, so we fail early here:
1182
757
if byte_arrays and signature != "ay":
1183
758
raise ValueError("Byte arrays not supported for non-'ay'"
1184
" signature {!r}".format(signature))
1185
759
" signature %r" % signature)
1186
760
def decorator(func):
1187
761
func._dbus_is_property = True
1188
762
func._dbus_interface = dbus_interface
1191
765
func._dbus_name = func.__name__
1192
766
if func._dbus_name.endswith("_dbus_property"):
1193
767
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
768
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
769
return func
1240
770
return decorator
1241
771
1242
772
1243
773
class DBusPropertyException(dbus.exceptions.DBusException):
1244
774
"""A base class for D-Bus property-related exceptions
1245
775
"""
1246
pass
776
def __unicode__(self):
777
return unicode(str(self))
1247
778
1248
779
1249
780
class DBusPropertyAccessException(DBusPropertyException):
1258
789
pass
1259
790
1260
791
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):
792
class DBusObjectWithProperties(dbus.service.Object):
1351
793
"""A D-Bus object with properties.
1352
794
1353
795
Classes inheriting from this can use the dbus_service_property
1354
796
decorator to expose methods as D-Bus properties. It exposes the
1355
797
standard Get(), Set(), and GetAll() methods on the D-Bus.
1356
798
"""
1357
799
800
@staticmethod
801
def _is_dbus_property(obj):
802
return getattr(obj, "_dbus_is_property", False)
803
804
def _get_all_dbus_properties(self):
805
"""Returns a generator of (name, attribute) pairs
806
"""
807
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
808
for cls in self.__class__.__mro__
809
for name, prop in
810
inspect.getmembers(cls, self._is_dbus_property))
811
1358
812
def _get_dbus_property(self, interface_name, property_name):
1359
813
"""Returns a bound method if one exists which is a D-Bus
1360
814
property with the specified name and interface.
1361
815
"""
1362
for cls in self.__class__.__mro__:
1363
for name, value in inspect.getmembers(
1364
cls, self._is_dbus_thing("property")):
816
for cls in self.__class__.__mro__:
817
for name, value in (inspect.getmembers
818
(cls, self._is_dbus_property)):
1365
819
if (value._dbus_name == property_name
1366
820
and value._dbus_interface == interface_name):
1367
821
return value.__get__(self)
1368
822
1369
823
# 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",
824
raise DBusPropertyNotFound(self.dbus_object_path + ":"
825
+ interface_name + "."
826
+ property_name)
827
828
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1384
829
out_signature="v")
1385
830
def Get(self, interface_name, property_name):
1386
831
"""Standard D-Bus property Get() method, see D-Bus standard.
1392
837
if not hasattr(value, "variant_level"):
1393
838
return value
1394
839
return type(value)(value, variant_level=value.variant_level+1)
1395
840
1396
841
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1397
842
def Set(self, interface_name, property_name, value):
1398
843
"""Standard D-Bus property Set() method, see D-Bus standard.
1404
849
# The byte_arrays option is not supported yet on
1405
850
# signatures other than "ay".
1406
851
if prop._dbus_signature != "ay":
1407
raise ValueError("Byte arrays not supported for non-"
1408
"'ay' signature {!r}"
1409
.format(prop._dbus_signature))
852
raise ValueError
1410
853
value = dbus.ByteArray(b''.join(chr(byte)
1411
854
for byte in value))
1412
855
prop(value)
1413
1414
@dbus.service.method(dbus.PROPERTIES_IFACE,
1415
in_signature="s",
856
857
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1416
858
out_signature="a{sv}")
1417
859
def GetAll(self, interface_name):
1418
860
"""Standard D-Bus property GetAll() method, see D-Bus
1419
861
standard.
1420
862
1421
863
Note: Will not include properties with access="write".
1422
864
"""
1423
865
properties = {}
1424
for name, prop in self._get_all_dbus_things("property"):
866
for name, prop in self._get_all_dbus_properties():
1425
867
if (interface_name
1426
868
and interface_name != prop._dbus_interface):
1427
869
# Interface non-empty but did not match
1433
875
if not hasattr(value, "variant_level"):
1434
876
properties[name] = value
1435
877
continue
1436
properties[name] = type(value)(
1437
value, variant_level=value.variant_level + 1)
878
properties[name] = type(value)(value, variant_level=
879
value.variant_level+1)
1438
880
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
881
1448
882
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1449
883
out_signature="s",
1450
884
path_keyword='object_path',
1451
885
connection_keyword='connection')
1452
886
def Introspect(self, object_path, connection):
1453
"""Overloading of standard D-Bus method.
1454
1455
Inserts property tags and interface annotation tags.
887
"""Standard D-Bus method, overloaded to insert property tags.
1456
888
"""
1457
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1458
object_path,
1459
connection)
889
xmlstring = dbus.service.Object.Introspect(self, object_path,
890
connection)
1460
891
try:
1461
892
document = xml.dom.minidom.parseString(xmlstring)
1462
1463
893
def make_tag(document, name, prop):
1464
894
e = document.createElement("property")
1465
895
e.setAttribute("name", name)
1466
896
e.setAttribute("type", prop._dbus_signature)
1467
897
e.setAttribute("access", prop._dbus_access)
1468
898
return e
1469
1470
899
for if_tag in document.getElementsByTagName("interface"):
1471
# Add property tags
1472
900
for tag in (make_tag(document, name, prop)
1473
901
for name, prop
1474
in self._get_all_dbus_things("property")
902
in self._get_all_dbus_properties()
1475
903
if prop._dbus_interface
1476
904
== if_tag.getAttribute("name")):
1477
905
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
906
# Add the names to the return values for the
1495
907
# "org.freedesktop.DBus.Properties" methods
1496
908
if (if_tag.getAttribute("name")
1511
923
except (AttributeError, xml.dom.DOMException,
1512
924
xml.parsers.expat.ExpatError) as error:
1513
925
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):
926
error)
927
return xmlstring
928
929
930
def datetime_to_dbus (dt, variant_level=0):
1590
931
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1591
932
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).
933
return dbus.String("", variant_level = variant_level)
934
return dbus.String(dt.isoformat(),
935
variant_level=variant_level)
936
937
938
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
939
.__metaclass__):
940
"""Applied to an empty subclass of a D-Bus object, this metaclass
941
will add additional D-Bus attributes matching a certain pattern.
1618
942
"""
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):
943
def __new__(mcs, name, bases, attr):
944
# Go through all the base classes which could have D-Bus
945
# methods, signals, or properties in them
946
for base in (b for b in bases
947
if issubclass(b, dbus.service.Object)):
948
# Go though all attributes of the base class
949
for attrname, attribute in inspect.getmembers(base):
1627
950
# Ignore non-D-Bus attributes, and D-Bus attributes
1628
951
# with the wrong interface name
1629
952
if (not hasattr(attribute, "_dbus_interface")
1630
or not attribute._dbus_interface.startswith(
1631
orig_interface_name)):
953
or not attribute._dbus_interface
954
.startswith("se.recompile.Mandos")):
1632
955
continue
1633
956
# Create an alternate D-Bus interface name based on
1634
957
# the current name
1635
alt_interface = attribute._dbus_interface.replace(
1636
orig_interface_name, alt_interface_name)
1637
interface_names.add(alt_interface)
958
alt_interface = (attribute._dbus_interface
959
.replace("se.recompile.Mandos",
960
"se.bsnet.fukt.Mandos"))
1638
961
# Is this a D-Bus signal?
1639
962
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(
963
# Extract the original non-method function by
964
# black magic
965
nonmethod_func = (dict(
1644
966
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)
967
attribute.__closure__))["func"]
968
.cell_contents)
1652
969
# Create a new, but exactly alike, function
1653
970
# object, and decorate it to be a new D-Bus signal
1654
971
# 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
972
new_function = (dbus.service.signal
973
(alt_interface,
974
attribute._dbus_signature)
975
(types.FunctionType(
976
nonmethod_func.func_code,
977
nonmethod_func.func_globals,
978
nonmethod_func.func_name,
979
nonmethod_func.func_defaults,
980
nonmethod_func.func_closure)))
1666
981
# 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
982
# old and new functions, so both the old and new
983
# signals gets sent when the function is called
1670
984
def fixscope(func1, func2):
1671
985
"""This function is a scope container to pass
1672
986
func1 and func2 to the "call_both" function
1673
987
outside of its arguments"""
1674
1675
@functools.wraps(func2)
1676
988
def call_both(*args, **kwargs):
1677
989
"""This function will emit two D-Bus
1678
990
signals by calling func1 and func2"""
1679
991
func1(*args, **kwargs)
1680
992
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
993
return call_both
1688
994
# Create the "call_both" function and add it to
1689
995
# the class
1690
attr[attrname] = fixscope(attribute, new_function)
996
attr[attrname] = fixscope(attribute,
997
new_function)
1691
998
# Is this a D-Bus method?
1692
999
elif getattr(attribute, "_dbus_is_method", False):
1693
1000
# Create a new, but exactly alike, function
1694
1001
# object. Decorate it to be a new D-Bus method
1695
1002
# with the alternate D-Bus interface name. Add it
1696
1003
# 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
1004
attr[attrname] = (dbus.service.method
1005
(alt_interface,
1006
attribute._dbus_in_signature,
1007
attribute._dbus_out_signature)
1008
(types.FunctionType
1009
(attribute.func_code,
1010
attribute.func_globals,
1011
attribute.func_name,
1012
attribute.func_defaults,
1013
attribute.func_closure)))
1709
1014
# Is this a D-Bus property?
1710
1015
elif getattr(attribute, "_dbus_is_property", False):
1711
1016
# Create a new, but exactly alike, function
1712
1017
# object, and decorate it to be a new D-Bus
1713
1018
# property with the alternate D-Bus interface
1714
1019
# 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"})
1020
attr[attrname] = (dbus_service_property
1021
(alt_interface,
1022
attribute._dbus_signature,
1023
attribute._dbus_access,
1024
attribute
1025
._dbus_get_args_options
1026
["byte_arrays"])
1027
(types.FunctionType
1028
(attribute.func_code,
1029
attribute.func_globals,
1030
attribute.func_name,
1031
attribute.func_defaults,
1032
attribute.func_closure)))
1033
return type.__new__(mcs, name, bases, attr)
1034
1035
1767
1036
class ClientDBus(Client, DBusObjectWithProperties):
1768
1037
"""A Client class using D-Bus
1769
1038
1770
1039
Attributes:
1771
1040
dbus_object_path: dbus.ObjectPath
1772
1041
bus: dbus.SystemBus()
1773
1042
"""
1774
1043
1775
1044
runtime_expansions = (Client.runtime_expansions
1776
+ ("dbus_object_path", ))
1777
1778
_interface = "se.recompile.Mandos.Client"
1779
1045
+ ("dbus_object_path",))
1046
1780
1047
# dbus.service.Object doesn't use super(), so we can't either.
1781
1782
def __init__(self, bus=None, *args, **kwargs):
1048
1049
def __init__(self, bus = None, *args, **kwargs):
1783
1050
self.bus = bus
1784
1051
Client.__init__(self, *args, **kwargs)
1052
self._approvals_pending = 0
1053
1054
self._approvals_pending = 0
1785
1055
# Only now, when this client is initialized, can it show up on
1786
1056
# the D-Bus
1787
client_object_name = str(self.name).translate(
1057
client_object_name = unicode(self.name).translate(
1788
1058
{ord("."): ord("_"),
1789
1059
ord("-"): ord("_")})
1790
self.dbus_object_path = dbus.ObjectPath(
1791
"/clients/" + client_object_name)
1060
self.dbus_object_path = (dbus.ObjectPath
1061
("/clients/" + client_object_name))
1792
1062
DBusObjectWithProperties.__init__(self, self.bus,
1793
1063
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):
1064
1065
def notifychangeproperty(transform_func,
1066
dbus_name, type_func=lambda x: x,
1067
variant_level=1):
1800
1068
""" Modify a variable so that it's a property which announces
1801
1069
its changes to DBus.
1802
1070
1803
1071
transform_fun: Function that takes a value and a variant_level
1804
1072
and transforms it to a D-Bus type.
1805
1073
dbus_name: D-Bus name of the variable
1807
1075
to the D-Bus. Default: no transform
1808
1076
variant_level: D-Bus variant level. Default: 1
1809
1077
"""
1810
attrname = "_{}".format(dbus_name)
1811
1078
attrname = "_{0}".format(dbus_name)
1812
1079
def setter(self, value):
1813
1080
if hasattr(self, "dbus_object_path"):
1814
1081
if (not hasattr(self, attrname) or
1815
1082
type_func(getattr(self, attrname, None))
1816
1083
!= 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())
1084
dbus_value = transform_func(type_func(value),
1085
variant_level
1086
=variant_level)
1087
self.PropertyChanged(dbus.String(dbus_name),
1088
dbus_value)
1832
1089
setattr(self, attrname, value)
1833
1090
1834
1091
return property(lambda self: getattr(self, attrname), setter)
1835
1092
1093
1836
1094
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1837
1095
approvals_pending = notifychangeproperty(dbus.Boolean,
1838
1096
"ApprovalPending",
1839
type_func=bool)
1097
type_func = bool)
1840
1098
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1841
1099
last_enabled = notifychangeproperty(datetime_to_dbus,
1842
1100
"LastEnabled")
1843
checker = notifychangeproperty(
1844
dbus.Boolean, "CheckerRunning",
1845
type_func=lambda checker: checker is not None)
1101
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1102
type_func = lambda checker:
1103
checker is not None)
1846
1104
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1847
1105
"LastCheckedOK")
1848
last_checker_status = notifychangeproperty(dbus.Int16,
1849
"LastCheckerStatus")
1850
1106
last_approval_request = notifychangeproperty(
1851
1107
datetime_to_dbus, "LastApprovalRequest")
1852
1108
approved_by_default = notifychangeproperty(dbus.Boolean,
1853
1109
"ApprovedByDefault")
1854
approval_delay = notifychangeproperty(
1855
dbus.UInt64, "ApprovalDelay",
1856
type_func=lambda td: td.total_seconds() * 1000)
1110
approval_delay = notifychangeproperty(dbus.UInt64,
1111
"ApprovalDelay",
1112
type_func =
1113
timedelta_to_milliseconds)
1857
1114
approval_duration = notifychangeproperty(
1858
1115
dbus.UInt64, "ApprovalDuration",
1859
type_func=lambda td: td.total_seconds() * 1000)
1116
type_func = timedelta_to_milliseconds)
1860
1117
host = notifychangeproperty(dbus.String, "Host")
1861
timeout = notifychangeproperty(
1862
dbus.UInt64, "Timeout",
1863
type_func=lambda td: td.total_seconds() * 1000)
1118
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1119
type_func =
1120
timedelta_to_milliseconds)
1864
1121
extended_timeout = notifychangeproperty(
1865
1122
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)
1123
type_func = timedelta_to_milliseconds)
1124
interval = notifychangeproperty(dbus.UInt64,
1125
"Interval",
1126
type_func =
1127
timedelta_to_milliseconds)
1870
1128
checker_command = notifychangeproperty(dbus.String, "Checker")
1871
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1872
invalidate_only=True)
1873
1129
1874
1130
del notifychangeproperty
1875
1131
1876
1132
def __del__(self, *args, **kwargs):
1877
1133
try:
1878
1134
self.remove_from_connection()
1881
1137
if hasattr(DBusObjectWithProperties, "__del__"):
1882
1138
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1883
1139
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:
1140
1141
def checker_callback(self, pid, condition, command,
1142
*args, **kwargs):
1143
self.checker_callback_tag = None
1144
self.checker = None
1145
if os.WIFEXITED(condition):
1146
exitstatus = os.WEXITSTATUS(condition)
1892
1147
# Emit D-Bus signal
1893
1148
self.CheckerCompleted(dbus.Int16(exitstatus),
1894
# This is specific to GNU libC
1895
dbus.Int64(exitstatus << 8),
1149
dbus.Int64(condition),
1896
1150
dbus.String(command))
1897
1151
else:
1898
1152
# Emit D-Bus signal
1899
1153
self.CheckerCompleted(dbus.Int16(-1),
1900
dbus.Int64(
1901
# This is specific to GNU libC
1902
(exitstatus << 8)
1903
| self.last_checker_signal),
1154
dbus.Int64(condition),
1904
1155
dbus.String(command))
1905
return ret
1906
1156
1157
return Client.checker_callback(self, pid, condition, command,
1158
*args, **kwargs)
1159
1907
1160
def start_checker(self, *args, **kwargs):
1908
old_checker_pid = getattr(self.checker, "pid", None)
1161
old_checker = self.checker
1162
if self.checker is not None:
1163
old_checker_pid = self.checker.pid
1164
else:
1165
old_checker_pid = None
1909
1166
r = Client.start_checker(self, *args, **kwargs)
1910
1167
# Only if new checker process was started
1911
1168
if (self.checker is not None
1913
1170
# Emit D-Bus signal
1914
1171
self.CheckerStarted(self.current_checker_command)
1915
1172
return r
1916
1173
1917
1174
def _reset_approved(self):
1918
1175
self.approved = None
1919
1176
return False
1920
1177
1921
1178
def approve(self, value=True):
1179
self.send_changedstate()
1922
1180
self.approved = value
1923
GLib.timeout_add(int(self.approval_duration.total_seconds()
1924
* 1000), self._reset_approved)
1925
self.send_changedstate()
1926
1927
# D-Bus methods, signals & properties
1928
1929
# Interfaces
1930
1931
# Signals
1932
1181
gobject.timeout_add(timedelta_to_milliseconds
1182
(self.approval_duration),
1183
self._reset_approved)
1184
1185
1186
## D-Bus methods, signals & properties
1187
_interface = "se.recompile.Mandos.Client"
1188
1189
## Signals
1190
1933
1191
# CheckerCompleted - signal
1934
1192
@dbus.service.signal(_interface, signature="nxs")
1935
1193
def CheckerCompleted(self, exitcode, waitstatus, command):
1936
1194
"D-Bus signal"
1937
1195
pass
1938
1196
1939
1197
# CheckerStarted - signal
1940
1198
@dbus.service.signal(_interface, signature="s")
1941
1199
def CheckerStarted(self, command):
1942
1200
"D-Bus signal"
1943
1201
pass
1944
1202
1945
1203
# PropertyChanged - signal
1946
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1947
1204
@dbus.service.signal(_interface, signature="sv")
1948
1205
def PropertyChanged(self, property, value):
1949
1206
"D-Bus signal"
1950
1207
pass
1951
1208
1952
1209
# GotSecret - signal
1953
1210
@dbus.service.signal(_interface)
1954
1211
def GotSecret(self):
1957
1214
server to mandos-client
1958
1215
"""
1959
1216
pass
1960
1217
1961
1218
# Rejected - signal
1962
1219
@dbus.service.signal(_interface, signature="s")
1963
1220
def Rejected(self, reason):
1964
1221
"D-Bus signal"
1965
1222
pass
1966
1223
1967
1224
# NeedApproval - signal
1968
1225
@dbus.service.signal(_interface, signature="tb")
1969
1226
def NeedApproval(self, timeout, default):
1970
1227
"D-Bus signal"
1971
1228
return self.need_approval()
1972
1973
# Methods
1974
1229
1230
# NeRwequest - signal
1231
@dbus.service.signal(_interface, signature="s")
1232
def NewRequest(self, ip):
1233
"""D-Bus signal
1234
Is sent after a client request a password.
1235
"""
1236
pass
1237
1238
## Methods
1239
1975
1240
# Approve - method
1976
1241
@dbus.service.method(_interface, in_signature="b")
1977
1242
def Approve(self, value):
1978
1243
self.approve(value)
1979
1244
1980
1245
# CheckedOK - method
1981
1246
@dbus.service.method(_interface)
1982
1247
def CheckedOK(self):
1983
1248
self.checked_ok()
1984
1249
1985
1250
# Enable - method
1986
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1987
1251
@dbus.service.method(_interface)
1988
1252
def Enable(self):
1989
1253
"D-Bus method"
1990
1254
self.enable()
1991
1255
1992
1256
# StartChecker - method
1993
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1994
1257
@dbus.service.method(_interface)
1995
1258
def StartChecker(self):
1996
1259
"D-Bus method"
1997
1260
self.start_checker()
1998
1261
1999
1262
# Disable - method
2000
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2001
1263
@dbus.service.method(_interface)
2002
1264
def Disable(self):
2003
1265
"D-Bus method"
2004
1266
self.disable()
2005
1267
2006
1268
# StopChecker - method
2007
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2008
1269
@dbus.service.method(_interface)
2009
1270
def StopChecker(self):
2010
1271
self.stop_checker()
2011
2012
# Properties
2013
1272
1273
## Properties
1274
2014
1275
# ApprovalPending - property
2015
1276
@dbus_service_property(_interface, signature="b", access="read")
2016
1277
def ApprovalPending_dbus_property(self):
2017
1278
return dbus.Boolean(bool(self.approvals_pending))
2018
1279
2019
1280
# ApprovedByDefault - property
2020
@dbus_service_property(_interface,
2021
signature="b",
1281
@dbus_service_property(_interface, signature="b",
2022
1282
access="readwrite")
2023
1283
def ApprovedByDefault_dbus_property(self, value=None):
2024
1284
if value is None: # get
2025
1285
return dbus.Boolean(self.approved_by_default)
2026
1286
self.approved_by_default = bool(value)
2027
1287
2028
1288
# ApprovalDelay - property
2029
@dbus_service_property(_interface,
2030
signature="t",
1289
@dbus_service_property(_interface, signature="t",
2031
1290
access="readwrite")
2032
1291
def ApprovalDelay_dbus_property(self, value=None):
2033
1292
if value is None: # get
2034
return dbus.UInt64(self.approval_delay.total_seconds()
2035
* 1000)
1293
return dbus.UInt64(self.approval_delay_milliseconds())
2036
1294
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2037
1295
2038
1296
# ApprovalDuration - property
2039
@dbus_service_property(_interface,
2040
signature="t",
1297
@dbus_service_property(_interface, signature="t",
2041
1298
access="readwrite")
2042
1299
def ApprovalDuration_dbus_property(self, value=None):
2043
1300
if value is None: # get
2044
return dbus.UInt64(self.approval_duration.total_seconds()
2045
* 1000)
1301
return dbus.UInt64(timedelta_to_milliseconds(
1302
self.approval_duration))
2046
1303
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2047
1304
2048
1305
# Name - property
2049
@dbus_annotations(
2050
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2051
1306
@dbus_service_property(_interface, signature="s", access="read")
2052
1307
def Name_dbus_property(self):
2053
1308
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
1309
2062
1310
# Fingerprint - property
2063
@dbus_annotations(
2064
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2065
1311
@dbus_service_property(_interface, signature="s", access="read")
2066
1312
def Fingerprint_dbus_property(self):
2067
1313
return dbus.String(self.fingerprint)
2068
1314
2069
1315
# Host - property
2070
@dbus_service_property(_interface,
2071
signature="s",
1316
@dbus_service_property(_interface, signature="s",
2072
1317
access="readwrite")
2073
1318
def Host_dbus_property(self, value=None):
2074
1319
if value is None: # get
2075
1320
return dbus.String(self.host)
2076
self.host = str(value)
2077
1321
self.host = unicode(value)
1322
2078
1323
# Created - property
2079
@dbus_annotations(
2080
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2081
1324
@dbus_service_property(_interface, signature="s", access="read")
2082
1325
def Created_dbus_property(self):
2083
1326
return datetime_to_dbus(self.created)
2084
1327
2085
1328
# LastEnabled - property
2086
1329
@dbus_service_property(_interface, signature="s", access="read")
2087
1330
def LastEnabled_dbus_property(self):
2088
1331
return datetime_to_dbus(self.last_enabled)
2089
1332
2090
1333
# Enabled - property
2091
@dbus_service_property(_interface,
2092
signature="b",
1334
@dbus_service_property(_interface, signature="b",
2093
1335
access="readwrite")
2094
1336
def Enabled_dbus_property(self, value=None):
2095
1337
if value is None: # get
2098
1340
self.enable()
2099
1341
else:
2100
1342
self.disable()
2101
1343
2102
1344
# LastCheckedOK - property
2103
@dbus_service_property(_interface,
2104
signature="s",
1345
@dbus_service_property(_interface, signature="s",
2105
1346
access="readwrite")
2106
1347
def LastCheckedOK_dbus_property(self, value=None):
2107
1348
if value is not None:
2108
1349
self.checked_ok()
2109
1350
return
2110
1351
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
1352
2117
1353
# Expires - property
2118
1354
@dbus_service_property(_interface, signature="s", access="read")
2119
1355
def Expires_dbus_property(self):
2120
1356
return datetime_to_dbus(self.expires)
2121
1357
2122
1358
# LastApprovalRequest - property
2123
1359
@dbus_service_property(_interface, signature="s", access="read")
2124
1360
def LastApprovalRequest_dbus_property(self):
2125
1361
return datetime_to_dbus(self.last_approval_request)
2126
1362
2127
1363
# Timeout - property
2128
@dbus_service_property(_interface,
2129
signature="t",
1364
@dbus_service_property(_interface, signature="t",
2130
1365
access="readwrite")
2131
1366
def Timeout_dbus_property(self, value=None):
2132
1367
if value is None: # get
2133
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2134
old_timeout = self.timeout
1368
return dbus.UInt64(self.timeout_milliseconds())
2135
1369
self.timeout = datetime.timedelta(0, 0, 0, value)
2136
# Reschedule disabling
1370
# Reschedule timeout
2137
1371
if self.enabled:
2138
1372
now = datetime.datetime.utcnow()
2139
self.expires += self.timeout - old_timeout
2140
if self.expires <= now:
1373
time_to_die = timedelta_to_milliseconds(
1374
(self.last_checked_ok + self.timeout) - now)
1375
if time_to_die <= 0:
2141
1376
# The timeout has passed
2142
1377
self.disable()
2143
1378
else:
1379
self.expires = (now +
1380
datetime.timedelta(milliseconds =
1381
time_to_die))
2144
1382
if (getattr(self, "disable_initiator_tag", None)
2145
1383
is None):
2146
1384
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
1385
gobject.source_remove(self.disable_initiator_tag)
1386
self.disable_initiator_tag = (gobject.timeout_add
1387
(time_to_die,
1388
self.disable))
1389
2152
1390
# ExtendedTimeout - property
2153
@dbus_service_property(_interface,
2154
signature="t",
1391
@dbus_service_property(_interface, signature="t",
2155
1392
access="readwrite")
2156
1393
def ExtendedTimeout_dbus_property(self, value=None):
2157
1394
if value is None: # get
2158
return dbus.UInt64(self.extended_timeout.total_seconds()
2159
* 1000)
1395
return dbus.UInt64(self.extended_timeout_milliseconds())
2160
1396
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2161
1397
2162
1398
# Interval - property
2163
@dbus_service_property(_interface,
2164
signature="t",
1399
@dbus_service_property(_interface, signature="t",
2165
1400
access="readwrite")
2166
1401
def Interval_dbus_property(self, value=None):
2167
1402
if value is None: # get
2168
return dbus.UInt64(self.interval.total_seconds() * 1000)
1403
return dbus.UInt64(self.interval_milliseconds())
2169
1404
self.interval = datetime.timedelta(0, 0, 0, value)
2170
1405
if getattr(self, "checker_initiator_tag", None) is None:
2171
1406
return
2172
1407
if self.enabled:
2173
1408
# 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
2178
1409
gobject.source_remove(self.checker_initiator_tag)
1410
self.checker_initiator_tag = (gobject.timeout_add
1411
(value, self.start_checker))
1412
self.start_checker() # Start one now, too
1413
2179
1414
# Checker - property
2180
@dbus_service_property(_interface,
2181
signature="s",
1415
@dbus_service_property(_interface, signature="s",
2182
1416
access="readwrite")
2183
1417
def Checker_dbus_property(self, value=None):
2184
1418
if value is None: # get
2185
1419
return dbus.String(self.checker_command)
2186
self.checker_command = str(value)
2187
1420
self.checker_command = unicode(value)
1421
2188
1422
# CheckerRunning - property
2189
@dbus_service_property(_interface,
2190
signature="b",
1423
@dbus_service_property(_interface, signature="b",
2191
1424
access="readwrite")
2192
1425
def CheckerRunning_dbus_property(self, value=None):
2193
1426
if value is None: # get
2196
1429
self.start_checker()
2197
1430
else:
2198
1431
self.stop_checker()
2199
1432
2200
1433
# ObjectPath - property
2201
@dbus_annotations(
2202
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2203
"org.freedesktop.DBus.Deprecated": "true"})
2204
1434
@dbus_service_property(_interface, signature="o", access="read")
2205
1435
def ObjectPath_dbus_property(self):
2206
return self.dbus_object_path # is already a dbus.ObjectPath
2207
1436
return self.dbus_object_path # is already a dbus.ObjectPath
1437
2208
1438
# 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)
1439
@dbus_service_property(_interface, signature="ay",
1440
access="write", byte_arrays=True)
2216
1441
def Secret_dbus_property(self, value):
2217
self.secret = bytes(value)
2218
1442
self.secret = str(value)
1443
2219
1444
del _interface
2220
1445
2221
1446
2222
1447
class ProxyClient(object):
2223
def __init__(self, child_pipe, key_id, fpr, address):
1448
def __init__(self, child_pipe, fpr, address):
2224
1449
self._pipe = child_pipe
2225
self._pipe.send(('init', key_id, fpr, address))
1450
self._pipe.send(('init', fpr, address))
2226
1451
if not self._pipe.recv():
2227
raise KeyError(key_id or fpr)
2228
1452
raise KeyError()
1453
2229
1454
def __getattribute__(self, name):
2230
1455
if name == '_pipe':
2231
1456
return super(ProxyClient, self).__getattribute__(name)
2234
1459
if data[0] == 'data':
2235
1460
return data[1]
2236
1461
if data[0] == 'function':
2237
2238
1462
def func(*args, **kwargs):
2239
1463
self._pipe.send(('funcall', name, args, kwargs))
2240
1464
return self._pipe.recv()[1]
2241
2242
1465
return func
2243
1466
2244
1467
def __setattr__(self, name, value):
2245
1468
if name == '_pipe':
2246
1469
return super(ProxyClient, self).__setattr__(name, value)
2247
1470
self._pipe.send(('setattr', name, value))
2248
1471
2249
1472
1473
class ClientDBusTransitional(ClientDBus):
1474
__metaclass__ = AlternateDBusNamesMetaclass
1475
1476
2250
1477
class ClientHandler(socketserver.BaseRequestHandler, object):
2251
1478
"""A class to handle client connections.
2252
1479
2253
1480
Instantiated once for each connection to handle it.
2254
1481
Note: This will run in its own forked process."""
2255
1482
2256
1483
def handle(self):
2257
1484
with contextlib.closing(self.server.child_pipe) as child_pipe:
2258
1485
logger.info("TCP connection from: %s",
2259
str(self.client_address))
1486
unicode(self.client_address))
2260
1487
logger.debug("Pipe FD: %d",
2261
1488
self.server.child_pipe.fileno())
2262
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"))
1489
1490
session = (gnutls.connection
1491
.ClientSession(self.request,
1492
gnutls.connection
1493
.X509Credentials()))
1494
1495
# Note: gnutls.connection.X509Credentials is really a
1496
# generic GnuTLS certificate credentials object so long as
1497
# no X.509 keys are added to it. Therefore, we can use it
1498
# here despite using OpenPGP certificates.
1499
1500
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1501
# "+AES-256-CBC", "+SHA1",
1502
# "+COMP-NULL", "+CTYPE-OPENPGP",
1503
# "+DHE-DSS"))
2269
1504
# Use a fallback default, since this MUST be set.
2270
1505
priority = self.server.gnutls_priority
2271
1506
if priority is None:
2272
1507
priority = "NORMAL"
2273
gnutls.priority_set_direct(session._c_object,
2274
priority.encode("utf-8"),
2275
None)
2276
1508
(gnutls.library.functions
1509
.gnutls_priority_set_direct(session._c_object,
1510
priority, None))
1511
2277
1512
# Start communication using the Mandos protocol
2278
1513
# Get protocol number
2279
1514
line = self.request.makefile().readline()
2280
1515
logger.debug("Protocol version: %r", line)
2281
1516
try:
2282
1517
if int(line.strip().split()[0]) > 1:
2283
raise RuntimeError(line)
1518
raise RuntimeError
2284
1519
except (ValueError, IndexError, RuntimeError) as error:
2285
1520
logger.error("Unknown protocol version: %s", error)
2286
1521
return
2287
1522
2288
1523
# Start GnuTLS connection
2289
1524
try:
2290
1525
session.handshake()
2291
except gnutls.Error as error:
1526
except gnutls.errors.GNUTLSError as error:
2292
1527
logger.warning("Handshake failed: %s", error)
2293
1528
# Do not run session.bye() here: the session is not
2294
1529
# established. Just abandon the request.
2295
1530
return
2296
1531
logger.debug("Handshake succeeded")
2297
1532
2298
1533
approval_required = False
2299
1534
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,
1535
try:
1536
fpr = self.fingerprint(self.peer_certificate
1537
(session))
1538
except (TypeError,
1539
gnutls.errors.GNUTLSError) as error:
1540
logger.warning("Bad certificate: %s", error)
1541
return
1542
logger.debug("Fingerprint: %s", fpr)
1543
1544
try:
1545
client = ProxyClient(child_pipe, fpr,
2322
1546
self.client_address)
2323
1547
except KeyError:
2324
1548
return
2325
1549
1550
if self.server.use_dbus:
1551
# Emit D-Bus signal
1552
client.NewRequest(str(self.client_address))
1553
2326
1554
if client.approval_delay:
2327
1555
delay = client.approval_delay
2328
1556
client.approvals_pending += 1
2329
1557
approval_required = True
2330
1558
2331
1559
while True:
2332
1560
if not client.enabled:
2333
1561
logger.info("Client %s is disabled",
2334
client.name)
1562
client.name)
2335
1563
if self.server.use_dbus:
2336
1564
# Emit D-Bus signal
2337
1565
client.Rejected("Disabled")
2338
1566
return
2339
1567
2340
1568
if client.approved or not client.approval_delay:
2341
# We are approved or approval is disabled
1569
#We are approved or approval is disabled
2342
1570
break
2343
1571
elif client.approved is None:
2344
1572
logger.info("Client %s needs approval",
2346
1574
if self.server.use_dbus:
2347
1575
# Emit D-Bus signal
2348
1576
client.NeedApproval(
2349
client.approval_delay.total_seconds()
2350
* 1000, client.approved_by_default)
1577
client.approval_delay_milliseconds(),
1578
client.approved_by_default)
2351
1579
else:
2352
1580
logger.warning("Client %s was not approved",
2353
1581
client.name)
2355
1583
# Emit D-Bus signal
2356
1584
client.Rejected("Denied")
2357
1585
return
2358
2359
# wait until timeout or approved
1586
1587
#wait until timeout or approved
2360
1588
time = datetime.datetime.now()
2361
1589
client.changedstate.acquire()
2362
client.changedstate.wait(delay.total_seconds())
1590
(client.changedstate.wait
1591
(float(client.timedelta_to_milliseconds(delay)
1592
/ 1000)))
2363
1593
client.changedstate.release()
2364
1594
time2 = datetime.datetime.now()
2365
1595
if (time2 - time) >= delay:
2375
1605
break
2376
1606
else:
2377
1607
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
2385
1608
1609
sent_size = 0
1610
while sent_size < len(client.secret):
1611
try:
1612
sent = session.send(client.secret[sent_size:])
1613
except gnutls.errors.GNUTLSError as error:
1614
logger.warning("gnutls send failed")
1615
return
1616
logger.debug("Sent: %d, remaining: %d",
1617
sent, len(client.secret)
1618
- (sent_size + sent))
1619
sent_size += sent
1620
2386
1621
logger.info("Sending secret to %s", client.name)
2387
1622
# bump the timeout using extended_timeout
2388
client.bump_timeout(client.extended_timeout)
1623
client.checked_ok(client.extended_timeout)
2389
1624
if self.server.use_dbus:
2390
1625
# Emit D-Bus signal
2391
1626
client.GotSecret()
2392
1627
2393
1628
finally:
2394
1629
if approval_required:
2395
1630
client.approvals_pending -= 1
2396
1631
try:
2397
1632
session.bye()
2398
except gnutls.Error as error:
2399
logger.warning("GnuTLS bye failed",
2400
exc_info=error)
2401
1633
except gnutls.errors.GNUTLSError as error:
1634
logger.warning("GnuTLS bye failed")
1635
2402
1636
@staticmethod
2403
1637
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""
1638
"Return the peer's OpenPGP certificate as a bytestring"
1639
# If not an OpenPGP certificate...
1640
if (gnutls.library.functions
1641
.gnutls_certificate_type_get(session._c_object)
1642
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1643
# ...do the normal thing
1644
return session.peer_certificate
2420
1645
list_size = ctypes.c_uint(1)
2421
cert_list = (gnutls.certificate_get_peers
1646
cert_list = (gnutls.library.functions
1647
.gnutls_certificate_get_peers
2422
1648
(session._c_object, ctypes.byref(list_size)))
2423
1649
if not bool(cert_list) and list_size.value != 0:
2424
raise gnutls.Error("error getting peer certificate")
1650
raise gnutls.errors.GNUTLSError("error getting peer"
1651
" certificate")
2425
1652
if list_size.value == 0:
2426
1653
return None
2427
1654
cert = cert_list[0]
2428
1655
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
1656
2464
1657
@staticmethod
2465
1658
def fingerprint(openpgp):
2466
1659
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2467
1660
# 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)))
1661
datum = (gnutls.library.types
1662
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1663
ctypes.POINTER
1664
(ctypes.c_ubyte)),
1665
ctypes.c_uint(len(openpgp))))
2472
1666
# New empty GnuTLS certificate
2473
crt = gnutls.openpgp_crt_t()
2474
gnutls.openpgp_crt_init(ctypes.byref(crt))
1667
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1668
(gnutls.library.functions
1669
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2475
1670
# Import the OpenPGP public key into the certificate
2476
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2477
gnutls.OPENPGP_FMT_RAW)
1671
(gnutls.library.functions
1672
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1673
gnutls.library.constants
1674
.GNUTLS_OPENPGP_FMT_RAW))
2478
1675
# Verify the self signature in the key
2479
1676
crtverify = ctypes.c_uint()
2480
gnutls.openpgp_crt_verify_self(crt, 0,
2481
ctypes.byref(crtverify))
1677
(gnutls.library.functions
1678
.gnutls_openpgp_crt_verify_self(crt, 0,
1679
ctypes.byref(crtverify)))
2482
1680
if crtverify.value != 0:
2483
gnutls.openpgp_crt_deinit(crt)
2484
raise gnutls.CertificateSecurityError(code
2485
=crtverify.value)
1681
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1682
raise (gnutls.errors.CertificateSecurityError
1683
("Verify failed"))
2486
1684
# New buffer for the fingerprint
2487
1685
buf = ctypes.create_string_buffer(20)
2488
1686
buf_len = ctypes.c_size_t()
2489
1687
# Get the fingerprint from the certificate into the buffer
2490
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2491
ctypes.byref(buf_len))
1688
(gnutls.library.functions
1689
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1690
ctypes.byref(buf_len)))
2492
1691
# Deinit the certificate
2493
gnutls.openpgp_crt_deinit(crt)
1692
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2494
1693
# Convert the buffer to a Python bytestring
2495
1694
fpr = ctypes.string_at(buf, buf_len.value)
2496
1695
# Convert the bytestring to hexadecimal notation
2500
1699
2501
1700
class MultiprocessingMixIn(object):
2502
1701
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2503
2504
1702
def sub_process_main(self, request, address):
2505
1703
try:
2506
1704
self.finish_request(request, address)
2507
1705
except Exception:
2508
1706
self.handle_error(request, address)
2509
1707
self.close_request(request)
2510
1708
2511
1709
def process_request(self, request, address):
2512
1710
"""Start a new process to process the request."""
2513
proc = multiprocessing.Process(target=self.sub_process_main,
2514
args=(request, address))
1711
proc = multiprocessing.Process(target = self.sub_process_main,
1712
args = (request,
1713
address))
2515
1714
proc.start()
2516
1715
return proc
2517
1716
2518
1717
2519
1718
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2520
1719
""" adds a pipe to the MixIn """
2521
2522
1720
def process_request(self, request, client_address):
2523
1721
"""Overrides and wraps the original process_request().
2524
1722
2525
1723
This function creates a new pipe in self.pipe
2526
1724
"""
2527
1725
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2528
1726
2529
1727
proc = MultiprocessingMixIn.process_request(self, request,
2530
1728
client_address)
2531
1729
self.child_pipe.close()
2532
1730
self.add_pipe(parent_pipe, proc)
2533
1731
2534
1732
def add_pipe(self, parent_pipe, proc):
2535
1733
"""Dummy function; override as necessary"""
2536
raise NotImplementedError()
1734
raise NotImplementedError
2537
1735
2538
1736
2539
1737
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2540
1738
socketserver.TCPServer, object):
2541
1739
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2542
1740
2543
1741
Attributes:
2544
1742
enabled: Boolean; whether this server is activated yet
2545
1743
interface: None or a network interface name (string)
2546
1744
use_ipv6: Boolean; to use IPv6 or not
2547
1745
"""
2548
2549
1746
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
"""
1747
interface=None, use_ipv6=True):
2556
1748
self.interface = interface
2557
1749
if use_ipv6:
2558
1750
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
1751
socketserver.TCPServer.__init__(self, server_address,
2587
1752
RequestHandlerClass)
2588
2589
1753
def server_bind(self):
2590
1754
"""This overrides the normal server_bind() function
2591
1755
to bind to an interface if one was specified, and also NOT to
2592
1756
bind to an address or port if they were not specified."""
2593
global SO_BINDTODEVICE
2594
1757
if self.interface is not None:
2595
1758
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
1759
logger.error("SO_BINDTODEVICE does not exist;"
1760
" cannot bind to interface %s",
1761
self.interface)
1762
else:
1763
try:
1764
self.socket.setsockopt(socket.SOL_SOCKET,
1765
SO_BINDTODEVICE,
1766
str(self.interface
1767
+ '\0'))
1768
except socket.error as error:
1769
if error[0] == errno.EPERM:
1770
logger.error("No permission to"
1771
" bind to interface %s",
1772
self.interface)
1773
elif error[0] == errno.ENOPROTOOPT:
1774
logger.error("SO_BINDTODEVICE not available;"
1775
" cannot bind to interface %s",
1776
self.interface)
1777
else:
1778
raise
2617
1779
# Only bind(2) the socket if we really need to.
2618
1780
if self.server_address[0] or self.server_address[1]:
2619
1781
if not self.server_address[0]:
2620
1782
if self.address_family == socket.AF_INET6:
2621
any_address = "::" # in6addr_any
1783
any_address = "::" # in6addr_any
2622
1784
else:
2623
any_address = "0.0.0.0" # INADDR_ANY
1785
any_address = socket.INADDR_ANY
2624
1786
self.server_address = (any_address,
2625
1787
self.server_address[1])
2626
1788
elif not self.server_address[1]:
2627
self.server_address = (self.server_address[0], 0)
1789
self.server_address = (self.server_address[0],
1790
0)
2628
1791
# if self.interface:
2629
1792
# self.server_address = (self.server_address[0],
2630
1793
# 0, # port
2636
1799
2637
1800
class MandosServer(IPv6_TCPServer):
2638
1801
"""Mandos server.
2639
1802
2640
1803
Attributes:
2641
1804
clients: set of Client objects
2642
1805
gnutls_priority GnuTLS priority string
2643
1806
use_dbus: Boolean; to emit D-Bus signals or not
2644
2645
Assumes a GLib.MainLoop event loop.
1807
1808
Assumes a gobject.MainLoop event loop.
2646
1809
"""
2647
2648
1810
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):
1811
interface=None, use_ipv6=True, clients=None,
1812
gnutls_priority=None, use_dbus=True):
2655
1813
self.enabled = False
2656
1814
self.clients = clients
2657
1815
if self.clients is None:
2660
1818
self.gnutls_priority = gnutls_priority
2661
1819
IPv6_TCPServer.__init__(self, server_address,
2662
1820
RequestHandlerClass,
2663
interface=interface,
2664
use_ipv6=use_ipv6,
2665
socketfd=socketfd)
2666
1821
interface = interface,
1822
use_ipv6 = use_ipv6)
2667
1823
def server_activate(self):
2668
1824
if self.enabled:
2669
1825
return socketserver.TCPServer.server_activate(self)
2670
1826
2671
1827
def enable(self):
2672
1828
self.enabled = True
2673
1829
2674
1830
def add_pipe(self, parent_pipe, proc):
2675
1831
# 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,
2686
client_object=None):
1832
gobject.io_add_watch(parent_pipe.fileno(),
1833
gobject.IO_IN | gobject.IO_HUP,
1834
functools.partial(self.handle_ipc,
1835
parent_pipe =
1836
parent_pipe,
1837
proc = proc))
1838
1839
def handle_ipc(self, source, condition, parent_pipe=None,
1840
proc = None, client_object=None):
1841
condition_names = {
1842
gobject.IO_IN: "IN", # There is data to read.
1843
gobject.IO_OUT: "OUT", # Data can be written (without
1844
# blocking).
1845
gobject.IO_PRI: "PRI", # There is urgent data to read.
1846
gobject.IO_ERR: "ERR", # Error condition.
1847
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1848
# broken, usually for pipes and
1849
# sockets).
1850
}
1851
conditions_string = ' | '.join(name
1852
for cond, name in
1853
condition_names.iteritems()
1854
if cond & condition)
2687
1855
# error, or the other end of multiprocessing.Pipe has closed
2688
if condition & (GLib.IO_ERR | GLib.IO_HUP):
1856
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2689
1857
# Wait for other process to exit
2690
1858
proc.join()
2691
1859
return False
2692
1860
2693
1861
# Read a request from the child
2694
1862
request = parent_pipe.recv()
2695
1863
command = request[0]
2696
1864
2697
1865
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:
1866
fpr = request[1]
1867
address = request[2]
1868
1869
for c in self.clients.itervalues():
1870
if c.fingerprint == fpr:
2709
1871
client = c
2710
1872
break
2711
1873
else:
2712
logger.info("Client not found for key ID: %s, address"
2713
": %s", key_id or fpr, address)
1874
logger.info("Client not found for fingerprint: %s, ad"
1875
"dress: %s", fpr, address)
2714
1876
if self.use_dbus:
2715
1877
# Emit D-Bus signal
2716
mandos_dbus_service.ClientNotFound(key_id or fpr,
1878
mandos_dbus_service.ClientNotFound(fpr,
2717
1879
address[0])
2718
1880
parent_pipe.send(False)
2719
1881
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))
1882
1883
gobject.io_add_watch(parent_pipe.fileno(),
1884
gobject.IO_IN | gobject.IO_HUP,
1885
functools.partial(self.handle_ipc,
1886
parent_pipe =
1887
parent_pipe,
1888
proc = proc,
1889
client_object =
1890
client))
2728
1891
parent_pipe.send(True)
2729
1892
# remove the old hook in favor of the new above hook on
2730
1893
# same fileno
2733
1896
funcname = request[1]
2734
1897
args = request[2]
2735
1898
kwargs = request[3]
2736
1899
2737
1900
parent_pipe.send(('data', getattr(client_object,
2738
1901
funcname)(*args,
2739
**kwargs)))
2740
1902
**kwargs)))
1903
2741
1904
if command == 'getattr':
2742
1905
attrname = request[1]
2743
if isinstance(client_object.__getattribute__(attrname),
2744
collections.Callable):
2745
parent_pipe.send(('function', ))
1906
if callable(client_object.__getattribute__(attrname)):
1907
parent_pipe.send(('function',))
2746
1908
else:
2747
parent_pipe.send((
2748
'data', client_object.__getattribute__(attrname)))
2749
1909
parent_pipe.send(('data', client_object
1910
.__getattribute__(attrname)))
1911
2750
1912
if command == 'setattr':
2751
1913
attrname = request[1]
2752
1914
value = request[2]
2753
1915
setattr(client_object, attrname, value)
2754
1916
2755
1917
return True
2756
1918
2757
1919
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
1920
def string_to_delta(interval):
2858
1921
"""Parse a string and return a datetime.timedelta
2859
1922
2860
1923
>>> string_to_delta('7d')
2861
1924
datetime.timedelta(7)
2862
1925
>>> string_to_delta('60s')
2870
1933
>>> string_to_delta('5m 30s')
2871
1934
datetime.timedelta(0, 330)
2872
1935
"""
2873
2874
try:
2875
return rfc3339_duration_to_delta(interval)
2876
except ValueError:
2877
pass
2878
2879
1936
timevalue = datetime.timedelta(0)
2880
1937
for s in interval.split():
2881
1938
try:
2882
suffix = s[-1]
1939
suffix = unicode(s[-1])
2883
1940
value = int(s[:-1])
2884
1941
if suffix == "d":
2885
1942
delta = datetime.timedelta(value)
2892
1949
elif suffix == "w":
2893
1950
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2894
1951
else:
2895
raise ValueError("Unknown suffix {!r}".format(suffix))
2896
except IndexError as e:
1952
raise ValueError("Unknown suffix %r" % suffix)
1953
except (ValueError, IndexError) as e:
2897
1954
raise ValueError(*(e.args))
2898
1955
timevalue += delta
2899
1956
return timevalue
2900
1957
2901
1958
2902
def daemon(nochdir=False, noclose=False):
1959
def daemon(nochdir = False, noclose = False):
2903
1960
"""See daemon(3). Standard BSD Unix function.
2904
1961
2905
1962
This should really exist as os.daemon, but it doesn't (yet)."""
2906
1963
if os.fork():
2907
1964
sys.exit()
2912
1969
sys.exit()
2913
1970
if not noclose:
2914
1971
# Close all standard open file descriptors
2915
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1972
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2916
1973
if not stat.S_ISCHR(os.fstat(null).st_mode):
2917
1974
raise OSError(errno.ENODEV,
2918
"{} not a character device"
2919
.format(os.devnull))
1975
"%s not a character device"
1976
% os.path.devnull)
2920
1977
os.dup2(null, sys.stdin.fileno())
2921
1978
os.dup2(null, sys.stdout.fileno())
2922
1979
os.dup2(null, sys.stderr.fileno())
2925
1982
2926
1983
2927
1984
def main():
2928
1985
2929
1986
##################################################################
2930
1987
# Parsing of options, both command line and config file
2931
1988
2932
1989
parser = argparse.ArgumentParser()
2933
1990
parser.add_argument("-v", "--version", action="version",
2934
version="%(prog)s {}".format(version),
1991
version = "%%(prog)s %s" % version,
2935
1992
help="show version number and exit")
2936
1993
parser.add_argument("-i", "--interface", metavar="IF",
2937
1994
help="Bind to interface IF")
2943
2000
help="Run self-test")
2944
2001
parser.add_argument("--debug", action="store_true",
2945
2002
help="Debug mode; run in foreground and log"
2946
" to terminal", default=None)
2003
" to terminal")
2947
2004
parser.add_argument("--debuglevel", metavar="LEVEL",
2948
2005
help="Debug level for stdout output")
2949
2006
parser.add_argument("--priority", help="GnuTLS"
2956
2013
" files")
2957
2014
parser.add_argument("--no-dbus", action="store_false",
2958
2015
dest="use_dbus", help="Do not provide D-Bus"
2959
" system bus interface", default=None)
2016
" system bus interface")
2960
2017
parser.add_argument("--no-ipv6", action="store_false",
2961
dest="use_ipv6", help="Do not use IPv6",
2962
default=None)
2018
dest="use_ipv6", help="Do not use IPv6")
2963
2019
parser.add_argument("--no-restore", action="store_false",
2964
2020
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")
2021
" state")
2969
2022
parser.add_argument("--statedir", metavar="DIR",
2970
2023
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
2024
2977
2025
options = parser.parse_args()
2978
2026
2979
2027
if options.check:
2980
2028
import doctest
2981
fail_count, test_count = doctest.testmod()
2982
sys.exit(os.EX_OK if fail_count == 0 else 1)
2983
2029
doctest.testmod()
2030
sys.exit()
2031
2984
2032
# 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
2033
server_defaults = { "interface": "",
2034
"address": "",
2035
"port": "",
2036
"debug": "False",
2037
"priority":
2038
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2039
"servicename": "Mandos",
2040
"use_dbus": "True",
2041
"use_ipv6": "True",
2042
"debuglevel": "",
2043
"restore": "True",
2044
"statedir": "/var/lib/mandos"
2045
}
2046
3008
2047
# Parse config file for server-global settings
3009
2048
server_config = configparser.SafeConfigParser(server_defaults)
3010
2049
del server_defaults
3011
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2050
server_config.read(os.path.join(options.configdir,
2051
"mandos.conf"))
3012
2052
# Convert the SafeConfigParser object to a dict
3013
2053
server_settings = server_config.defaults()
3014
2054
# Use the appropriate methods on the non-string config options
3015
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3016
"foreground", "zeroconf"):
2055
for option in ("debug", "use_dbus", "use_ipv6"):
3017
2056
server_settings[option] = server_config.getboolean("DEFAULT",
3018
2057
option)
3019
2058
if server_settings["port"]:
3020
2059
server_settings["port"] = server_config.getint("DEFAULT",
3021
2060
"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
2061
del server_config
3032
2062
3033
2063
# Override the settings from the config file with command line
3034
2064
# options, if set.
3035
2065
for option in ("interface", "address", "port", "debug",
3036
"priority", "servicename", "configdir", "use_dbus",
3037
"use_ipv6", "debuglevel", "restore", "statedir",
3038
"socket", "foreground", "zeroconf"):
2066
"priority", "servicename", "configdir",
2067
"use_dbus", "use_ipv6", "debuglevel", "restore",
2068
"statedir"):
3039
2069
value = getattr(options, option)
3040
2070
if value is not None:
3041
2071
server_settings[option] = value
3042
2072
del options
3043
2073
# Force all strings to be unicode
3044
2074
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
2075
if type(server_settings[option]) is str:
2076
server_settings[option] = unicode(server_settings[option])
3055
2077
# Now we have our good server settings in "server_settings"
3056
2078
3057
2079
##################################################################
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
2080
3064
2081
# For convenience
3065
2082
debug = server_settings["debug"]
3066
2083
debuglevel = server_settings["debuglevel"]
3068
2085
use_ipv6 = server_settings["use_ipv6"]
3069
2086
stored_state_path = os.path.join(server_settings["statedir"],
3070
2087
stored_state_file)
3071
foreground = server_settings["foreground"]
3072
zeroconf = server_settings["zeroconf"]
3073
2088
3074
2089
if debug:
3075
2090
initlogger(debug, logging.DEBUG)
3076
2091
else:
3079
2094
else:
3080
2095
level = getattr(logging, debuglevel.upper())
3081
2096
initlogger(debug, level)
3082
2097
3083
2098
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
2099
syslogger.setFormatter(logging.Formatter
2100
('Mandos (%s) [%%(process)d]:'
2101
' %%(levelname)s: %%(message)s'
2102
% server_settings["servicename"]))
2103
3089
2104
# Parse config file with clients
3090
2105
client_config = configparser.SafeConfigParser(Client
3091
2106
.client_defaults)
3092
2107
client_config.read(os.path.join(server_settings["configdir"],
3093
2108
"clients.conf"))
3094
2109
3095
2110
global mandos_dbus_service
3096
2111
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
2112
2113
tcp_server = MandosServer((server_settings["address"],
2114
server_settings["port"]),
2115
ClientHandler,
2116
interface=(server_settings["interface"]
2117
or None),
2118
use_ipv6=use_ipv6,
2119
gnutls_priority=
2120
server_settings["priority"],
2121
use_dbus=use_dbus)
2122
if not debug:
2123
pidfilename = "/var/run/mandos.pid"
2124
try:
2125
pidfile = open(pidfilename, "w")
2126
except IOError:
2127
logger.error("Could not open file %r", pidfilename)
2128
2129
try:
2130
uid = pwd.getpwnam("_mandos").pw_uid
2131
gid = pwd.getpwnam("_mandos").pw_gid
2132
except KeyError:
2133
try:
2134
uid = pwd.getpwnam("mandos").pw_uid
2135
gid = pwd.getpwnam("mandos").pw_gid
3127
2136
except KeyError:
3128
continue
3129
else:
3130
uid = 65534
3131
gid = 65534
2137
try:
2138
uid = pwd.getpwnam("nobody").pw_uid
2139
gid = pwd.getpwnam("nobody").pw_gid
2140
except KeyError:
2141
uid = 65534
2142
gid = 65534
3132
2143
try:
3133
2144
os.setgid(gid)
3134
2145
os.setuid(uid)
3135
if debug:
3136
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3137
gid))
3138
2146
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
3143
2147
if error[0] != errno.EPERM:
2148
raise error
2149
3144
2150
if debug:
3145
2151
# Enable all possible GnuTLS debugging
3146
2152
3147
2153
# "Use a log level over 10 to enable all debugging options."
3148
2154
# - GnuTLS manual
3149
gnutls.global_set_log_level(11)
3150
3151
@gnutls.log_func
2155
gnutls.library.functions.gnutls_global_set_log_level(11)
2156
2157
@gnutls.library.types.gnutls_log_func
3152
2158
def debug_gnutls(level, string):
3153
2159
logger.debug("GnuTLS: %s", string[:-1])
3154
3155
gnutls.global_set_log_function(debug_gnutls)
3156
2160
2161
(gnutls.library.functions
2162
.gnutls_global_set_log_function(debug_gnutls))
2163
3157
2164
# Redirect stdin so all checkers get /dev/null
3158
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2165
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3159
2166
os.dup2(null, sys.stdin.fileno())
3160
2167
if null > 2:
3161
2168
os.close(null)
3162
2169
3163
2170
# Need to fork before connecting to D-Bus
3164
if not foreground:
2171
if not debug:
3165
2172
# Close all input and output, do double fork, etc.
3166
2173
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
2174
2175
gobject.threads_init()
2176
3172
2177
global main_loop
3173
2178
# From the Avahi example code
3174
DBusGMainLoop(set_as_default=True)
3175
main_loop = GLib.MainLoop()
2179
DBusGMainLoop(set_as_default=True )
2180
main_loop = gobject.MainLoop()
3176
2181
bus = dbus.SystemBus()
3177
2182
# End of Avahi example code
3178
2183
if use_dbus:
3179
2184
try:
3180
2185
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)
2186
bus, do_not_queue=True)
2187
old_bus_name = (dbus.service.BusName
2188
("se.bsnet.fukt.Mandos", bus,
2189
do_not_queue=True))
2190
except dbus.exceptions.NameExistsException as e:
2191
logger.error(unicode(e) + ", disabling D-Bus")
3188
2192
use_dbus = False
3189
2193
server_settings["use_dbus"] = False
3190
2194
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
2195
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2196
service = AvahiServiceToSyslog(name =
2197
server_settings["servicename"],
2198
servicetype = "_mandos._tcp",
2199
protocol = protocol, bus = bus)
2200
if server_settings["interface"]:
2201
service.interface = (if_nametoindex
2202
(str(server_settings["interface"])))
2203
3202
2204
global multiprocessing_manager
3203
2205
multiprocessing_manager = multiprocessing.Manager()
3204
2206
3205
2207
client_class = Client
3206
2208
if use_dbus:
3207
client_class = functools.partial(ClientDBus, bus=bus)
3208
2209
client_class = functools.partial(ClientDBusTransitional,
2210
bus = bus)
2211
3209
2212
client_settings = Client.config_parser(client_config)
3210
2213
old_client_settings = {}
3211
2214
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
2215
3221
2216
# Get client data and settings from last running state.
3222
2217
if server_settings["restore"]:
3223
2218
try:
3224
2219
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"))
2220
clients_data, old_client_settings = (pickle.load
2221
(stored_state))
3274
2222
os.remove(stored_state_path)
3275
2223
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)
2224
logger.warning("Could not load persistent state: {0}"
2225
.format(e))
2226
if e.errno != errno.ENOENT:
3282
2227
raise
3283
2228
except EOFError as e:
3284
2229
logger.warning("Could not load persistent state: "
3285
"EOFError:",
3286
exc_info=e)
3287
2230
"EOFError: {0}".format(e))
2231
3288
2232
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
2233
for client_name, client in clients_data.iteritems():
3294
2234
# Decide which value to use after restoring saved state.
3295
2235
# We have three different values: Old config file,
3296
2236
# new config file, and saved state.
3301
2241
# For each value in new config, check if it
3302
2242
# differs from the old config value (Except for
3303
2243
# the "secret" attribute)
3304
if (name != "secret"
3305
and (value !=
3306
old_client_settings[client_name][name])):
2244
if (name != "secret" and
2245
value != old_client_settings[client_name]
2246
[name]):
3307
2247
client[name] = value
3308
2248
except KeyError:
3309
2249
pass
3310
2250
3311
2251
# 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.
2252
# enabled if its last checker was successful. Clients
2253
# whose checker failed before we stored its state is
2254
# assumed to have failed all checkers during downtime.
3316
2255
if client["enabled"]:
3317
2256
if datetime.datetime.utcnow() >= client["expires"]:
3318
2257
if not client["last_checked_ok"]:
3319
2258
logger.warning(
3320
"disabling client {} - Client never "
3321
"performed a successful checker".format(
3322
client_name))
2259
"disabling client {0} - Client never "
2260
"performed a successfull checker"
2261
.format(client["name"]))
3323
2262
client["enabled"] = False
3324
2263
elif client["last_checker_status"] != 0:
3325
2264
logger.warning(
3326
"disabling client {} - Client last"
3327
" checker failed with error code"
3328
" {}".format(
3329
client_name,
3330
client["last_checker_status"]))
2265
"disabling client {0} - Client "
2266
"last checker failed with error code {1}"
2267
.format(client["name"],
2268
client["last_checker_status"]))
3331
2269
client["enabled"] = False
3332
2270
else:
3333
client["expires"] = (
3334
datetime.datetime.utcnow()
3335
+ client["timeout"])
2271
client["expires"] = (datetime.datetime
2272
.utcnow()
2273
+ client["timeout"])
3336
2274
logger.debug("Last checker succeeded,"
3337
" keeping {} enabled".format(
3338
client_name))
2275
" keeping {0} enabled"
2276
.format(client["name"]))
3339
2277
try:
3340
client["secret"] = pgp.decrypt(
3341
client["encrypted_secret"],
3342
client_settings[client_name]["secret"])
2278
client["secret"] = (
2279
pgp.decrypt(client["encrypted_secret"],
2280
client_settings[client_name]
2281
["secret"]))
3343
2282
except PGPError:
3344
2283
# 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"])
2284
logger.debug("Failed to decrypt {0} old secret"
2285
.format(client_name))
2286
client["secret"] = (
2287
client_settings[client_name]["secret"])
3349
2288
2289
3350
2290
# Add/remove clients based on new changes made to config
3351
2291
for client_name in (set(old_client_settings)
3352
2292
- set(client_settings)):
3355
2295
- set(old_client_settings)):
3356
2296
clients_data[client_name] = client_settings[client_name]
3357
2297
3358
# Create all client objects
3359
for client_name, client in clients_data.items():
2298
# Create clients all clients
2299
for client_name, client in clients_data.iteritems():
3360
2300
tcp_server.clients[client_name] = client_class(
3361
name=client_name,
3362
settings=client,
3363
server_settings=server_settings)
3364
2301
name = client_name, settings = client)
2302
3365
2303
if not tcp_server.clients:
3366
2304
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
2305
2306
if not debug:
2307
try:
2308
with pidfile:
2309
pid = os.getpid()
2310
pidfile.write(str(pid) + "\n".encode("utf-8"))
2311
del pidfile
2312
except IOError:
2313
logger.error("Could not write to file %r with PID %d",
2314
pidfilename, pid)
2315
except NameError:
2316
# "pidfile" was never created
2317
pass
3378
2318
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
2319
signal.signal(signal.SIGINT, signal.SIG_IGN)
2320
2321
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2322
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2323
3384
2324
if use_dbus:
3385
3386
@alternate_dbus_interfaces(
3387
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3388
class MandosDBusService(DBusObjectWithObjectManager):
2325
class MandosDBusService(dbus.service.Object):
3389
2326
"""A D-Bus proxy object"""
3390
3391
2327
def __init__(self):
3392
2328
dbus.service.Object.__init__(self, bus, "/")
3393
3394
2329
_interface = "se.recompile.Mandos"
3395
2330
3396
2331
@dbus.service.signal(_interface, signature="o")
3397
2332
def ClientAdded(self, objpath):
3398
2333
"D-Bus signal"
3399
2334
pass
3400
2335
3401
2336
@dbus.service.signal(_interface, signature="ss")
3402
def ClientNotFound(self, key_id, address):
2337
def ClientNotFound(self, fingerprint, address):
3403
2338
"D-Bus signal"
3404
2339
pass
3405
3406
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3407
"true"})
2340
3408
2341
@dbus.service.signal(_interface, signature="os")
3409
2342
def ClientRemoved(self, objpath, name):
3410
2343
"D-Bus signal"
3411
2344
pass
3412
3413
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3414
"true"})
2345
3415
2346
@dbus.service.method(_interface, out_signature="ao")
3416
2347
def GetAllClients(self):
3417
2348
"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"})
2349
return dbus.Array(c.dbus_object_path
2350
for c in
2351
tcp_server.clients.itervalues())
2352
3423
2353
@dbus.service.method(_interface,
3424
2354
out_signature="a{oa{sv}}")
3425
2355
def GetAllClientsWithProperties(self):
3426
2356
"D-Bus method"
3427
2357
return dbus.Dictionary(
3428
{c.dbus_object_path: c.GetAll(
3429
"se.recompile.Mandos.Client")
3430
for c in tcp_server.clients.values()},
2358
((c.dbus_object_path, c.GetAll(""))
2359
for c in tcp_server.clients.itervalues()),
3431
2360
signature="oa{sv}")
3432
2361
3433
2362
@dbus.service.method(_interface, in_signature="o")
3434
2363
def RemoveClient(self, object_path):
3435
2364
"D-Bus method"
3436
for c in tcp_server.clients.values():
2365
for c in tcp_server.clients.itervalues():
3437
2366
if c.dbus_object_path == object_path:
3438
2367
del tcp_server.clients[c.name]
3439
2368
c.remove_from_connection()
3440
# Don't signal the disabling
2369
# Don't signal anything except ClientRemoved
3441
2370
c.disable(quiet=True)
3442
# Emit D-Bus signal for removal
3443
self.client_removed_signal(c)
2371
# Emit D-Bus signal
2372
self.ClientRemoved(object_path, c.name)
3444
2373
return
3445
2374
raise KeyError(object_path)
3446
2375
3447
2376
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
3485
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
2377
2378
class MandosDBusServiceTransitional(MandosDBusService):
2379
__metaclass__ = AlternateDBusNamesMetaclass
2380
mandos_dbus_service = MandosDBusServiceTransitional()
2381
3492
2382
def cleanup():
3493
2383
"Cleanup function; run on exit"
3494
if zeroconf:
3495
service.cleanup()
3496
3497
mp.active_children()
3498
wn.close()
2384
service.cleanup()
2385
2386
multiprocessing.active_children()
3499
2387
if not (tcp_server.clients or client_settings):
3500
2388
return
3501
2389
3502
2390
# Store client before exiting. Secrets are encrypted with key
3503
2391
# based on what config file has. If config file is
3504
2392
# removed/edited, old secret will thus be unrecovable.
3505
2393
clients = {}
3506
2394
with PGPEngine() as pgp:
3507
for client in tcp_server.clients.values():
2395
for client in tcp_server.clients.itervalues():
3508
2396
key = client_settings[client.name]["secret"]
3509
2397
client.encrypted_secret = pgp.encrypt(client.secret,
3510
2398
key)
3511
2399
client_dict = {}
3512
2400
3513
2401
# A list of attributes that can not be pickled
3514
2402
# + secret.
3515
exclude = {"bus", "changedstate", "secret",
3516
"checker", "server_settings"}
3517
for name, typ in inspect.getmembers(dbus.service
3518
.Object):
2403
exclude = set(("bus", "changedstate", "secret",
2404
"checker"))
2405
for name, typ in (inspect.getmembers
2406
(dbus.service.Object)):
3519
2407
exclude.add(name)
3520
2408
3521
2409
client_dict["encrypted_secret"] = (client
3522
2410
.encrypted_secret)
3523
2411
for attr in client.client_structure:
3524
2412
if attr not in exclude:
3525
2413
client_dict[attr] = getattr(client, attr)
3526
2414
3527
2415
clients[client.name] = client_dict
3528
2416
del client_settings[client.name]["secret"]
3529
2417
3530
2418
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
2419
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2420
prefix="clients-",
2421
dir=os.path.dirname
2422
(stored_state_path))
2423
with os.fdopen(tempfd, "wb") as stored_state:
2424
pickle.dump((clients, client_settings), stored_state)
3540
2425
os.rename(tempname, stored_state_path)
3541
2426
except (IOError, OSError) as e:
2427
logger.warning("Could not save persistent state: {0}"
2428
.format(e))
3542
2429
if not debug:
3543
2430
try:
3544
2431
os.remove(tempname)
3545
2432
except NameError:
3546
2433
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
2434
if e.errno not in set((errno.ENOENT, errno.EACCES,
2435
errno.EEXIST)):
2436
raise e
2437
3555
2438
# Delete all clients, and settings from config
3556
2439
while tcp_server.clients:
3557
2440
name, client = tcp_server.clients.popitem()
3558
2441
if use_dbus:
3559
2442
client.remove_from_connection()
3560
# Don't signal the disabling
2443
# Don't signal anything except ClientRemoved
3561
2444
client.disable(quiet=True)
3562
# Emit D-Bus signal for removal
3563
2445
if use_dbus:
3564
mandos_dbus_service.client_removed_signal(client)
2446
# Emit D-Bus signal
2447
mandos_dbus_service.ClientRemoved(client
2448
.dbus_object_path,
2449
client.name)
3565
2450
client_settings.clear()
3566
2451
3567
2452
atexit.register(cleanup)
3568
3569
for client in tcp_server.clients.values():
2453
2454
for client in tcp_server.clients.itervalues():
3570
2455
if use_dbus:
3571
# Emit D-Bus signal for adding
3572
mandos_dbus_service.client_added_signal(client)
2456
# Emit D-Bus signal
2457
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3573
2458
# Need to initiate checking of clients
3574
2459
if client.enabled:
3575
2460
client.init_checker()
3576
2461
3577
2462
tcp_server.enable()
3578
2463
tcp_server.server_activate()
3579
2464
3580
2465
# Find out what port we got
3581
if zeroconf:
3582
service.port = tcp_server.socket.getsockname()[1]
2466
service.port = tcp_server.socket.getsockname()[1]
3583
2467
if use_ipv6:
3584
2468
logger.info("Now listening on address %r, port %d,"
3585
" flowinfo %d, scope_id %d",
3586
*tcp_server.socket.getsockname())
2469
" flowinfo %d, scope_id %d"
2470
% tcp_server.socket.getsockname())
3587
2471
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
2472
logger.info("Now listening on address %r, port %d"
2473
% tcp_server.socket.getsockname())
2474
2475
#service.interface = tcp_server.socket.getsockname()[3]
2476
3593
2477
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
2478
# From the Avahi example code
2479
try:
2480
service.activate()
2481
except dbus.exceptions.DBusException as error:
2482
logger.critical("DBusException: %s", error)
2483
cleanup()
2484
sys.exit(1)
2485
# End of Avahi example code
2486
2487
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2488
lambda *args, **kwargs:
2489
(tcp_server.handle_request
2490
(*args[2:], **kwargs) or True))
2491
3609
2492
logger.debug("Starting main loop")
3610
2493
main_loop.run()
3611
2494
except AvahiError as error:
3612
logger.critical("Avahi Error", exc_info=error)
2495
logger.critical("AvahiError: %s", error)
3613
2496
cleanup()
3614
2497
sys.exit(1)
3615
2498
except KeyboardInterrupt:
3620
2503
# Must run before the D-Bus bus name gets deregistered
3621
2504
cleanup()
3622
2505
3623
3624
2506
if __name__ == '__main__':
3625
2507
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0