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- Committer: Teddy Hogeborn
- Date: 2018-02-06 20:03:50 UTC
- Revision ID: teddy@recompile.se-20180206200350-jzvorueb731xkph3
Update Debian Debhelper compatibility version.
* (debian/compat): Change to "10".
* (debian/compat): Change to "10".
- files added:
- bugs.xml
- debian/upstream
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
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2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
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# Mandos server - give out binary blobs to connecting clients.
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#
5
#
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# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
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# <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
#
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13
# Everything else is
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
14
# Copyright © 2008-2017 Teddy Hogeborn
15
# Copyright © 2008-2017 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
19
21
# the Free Software Foundation, either version 3 of the License, or
20
22
# (at your option) any later version.
21
23
#
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
24
26
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
27
# GNU General Public License for more details.
26
#
28
#
27
29
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
31
32
# Contact the authors at <mandos@recompile.se>.
32
#
33
#
33
34
34
35
from __future__ import (division, absolute_import, print_function,
35
36
unicode_literals)
36
37
37
import SocketServer as socketserver
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
38
47
import socket
39
48
import argparse
40
49
import datetime
41
50
import errno
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
49
55
import sys
50
56
import re
51
57
import os
60
66
import struct
61
67
import fcntl
62
68
import functools
63
import cPickle as pickle
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
64
73
import multiprocessing
65
74
import types
66
75
import binascii
67
76
import tempfile
77
import itertools
78
import collections
79
import codecs
68
80
69
81
import dbus
70
82
import dbus.service
71
import gobject
72
import avahi
83
from gi.repository import GLib
73
84
from dbus.mainloop.glib import DBusGMainLoop
74
85
import ctypes
75
86
import ctypes.util
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87
import xml.dom.minidom
77
88
import inspect
78
import GnuPGInterface
79
89
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# Try to find the value of SO_BINDTODEVICE:
80
91
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:
81
94
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
82
95
except AttributeError:
83
96
try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
84
99
from IN import SO_BINDTODEVICE
85
100
except ImportError:
86
SO_BINDTODEVICE = None
87
88
version = "1.5.1"
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 = "1.7.16"
89
119
stored_state_file = "clients.pickle"
90
120
91
121
logger = logging.getLogger()
92
syslogger = (logging.handlers.SysLogHandler
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
122
syslogger = None
95
123
96
124
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
125
if_nametoindex = ctypes.cdll.LoadLibrary(
126
ctypes.util.find_library("c")).if_nametoindex
100
127
except (OSError, AttributeError):
128
101
129
def if_nametoindex(interface):
102
130
"Get an interface index the hard way, i.e. using fcntl()"
103
131
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
132
with contextlib.closing(socket.socket()) as s:
105
133
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
134
struct.pack(b"16s16x", interface))
135
interface_index = struct.unpack("I", ifreq[16:20])[0]
110
136
return interface_index
111
137
112
138
139
def copy_function(func):
140
"""Make a copy of a function"""
141
if sys.version_info.major == 2:
142
return types.FunctionType(func.func_code,
143
func.func_globals,
144
func.func_name,
145
func.func_defaults,
146
func.func_closure)
147
else:
148
return types.FunctionType(func.__code__,
149
func.__globals__,
150
func.__name__,
151
func.__defaults__,
152
func.__closure__)
153
154
113
155
def initlogger(debug, level=logging.WARNING):
114
156
"""init logger and add loglevel"""
115
157
158
global syslogger
159
syslogger = (logging.handlers.SysLogHandler(
160
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
161
address="/dev/log"))
116
162
syslogger.setFormatter(logging.Formatter
117
163
('Mandos [%(process)d]: %(levelname)s:'
118
164
' %(message)s'))
119
165
logger.addHandler(syslogger)
120
166
121
167
if debug:
122
168
console = logging.StreamHandler()
123
169
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
135
181
136
182
class PGPEngine(object):
137
183
"""A simple class for OpenPGP symmetric encryption & decryption"""
184
138
185
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
140
186
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
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
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
148
206
def __enter__(self):
149
207
return self
150
151
def __exit__ (self, exc_type, exc_value, traceback):
208
209
def __exit__(self, exc_type, exc_value, traceback):
152
210
self._cleanup()
153
211
return False
154
212
155
213
def __del__(self):
156
214
self._cleanup()
157
215
158
216
def _cleanup(self):
159
217
if self.tempdir is not None:
160
218
# Delete contents of tempdir
161
219
for root, dirs, files in os.walk(self.tempdir,
162
topdown = False):
220
topdown=False):
163
221
for filename in files:
164
222
os.remove(os.path.join(root, filename))
165
223
for dirname in dirs:
167
225
# Remove tempdir
168
226
os.rmdir(self.tempdir)
169
227
self.tempdir = None
170
228
171
229
def password_encode(self, password):
172
230
# Passphrase can not be empty and can not contain newlines or
173
231
# NUL bytes. So we prefix it and hex encode it.
174
return b"mandos" + binascii.hexlify(password)
175
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
176
240
def encrypt(self, data, password):
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
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)
191
256
return ciphertext
192
257
193
258
def decrypt(self, data, password):
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
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)
208
274
return decrypted_plaintext
209
275
210
276
277
# Pretend that we have an Avahi module
278
class Avahi(object):
279
"""This isn't so much a class as it is a module-like namespace.
280
It is instantiated once, and simulates having an Avahi module."""
281
IF_UNSPEC = -1 # avahi-common/address.h
282
PROTO_UNSPEC = -1 # avahi-common/address.h
283
PROTO_INET = 0 # avahi-common/address.h
284
PROTO_INET6 = 1 # avahi-common/address.h
285
DBUS_NAME = "org.freedesktop.Avahi"
286
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
287
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
288
DBUS_PATH_SERVER = "/"
289
290
def string_array_to_txt_array(self, t):
291
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
for s in t), signature="ay")
293
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
294
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
295
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
296
SERVER_INVALID = 0 # avahi-common/defs.h
297
SERVER_REGISTERING = 1 # avahi-common/defs.h
298
SERVER_RUNNING = 2 # avahi-common/defs.h
299
SERVER_COLLISION = 3 # avahi-common/defs.h
300
SERVER_FAILURE = 4 # avahi-common/defs.h
301
avahi = Avahi()
302
211
303
212
304
class AvahiError(Exception):
213
305
def __init__(self, value, *args, **kwargs):
214
306
self.value = value
215
super(AvahiError, self).__init__(value, *args, **kwargs)
216
def __unicode__(self):
217
return unicode(repr(self.value))
307
return super(AvahiError, self).__init__(value, *args,
308
**kwargs)
309
218
310
219
311
class AvahiServiceError(AvahiError):
220
312
pass
221
313
314
222
315
class AvahiGroupError(AvahiError):
223
316
pass
224
317
225
318
226
319
class AvahiService(object):
227
320
"""An Avahi (Zeroconf) service.
228
321
229
322
Attributes:
230
323
interface: integer; avahi.IF_UNSPEC or an interface index.
231
324
Used to optionally bind to the specified interface.
232
325
name: string; Example: 'Mandos'
233
326
type: string; Example: '_mandos._tcp'.
234
See <http://www.dns-sd.org/ServiceTypes.html>
327
See <https://www.iana.org/assignments/service-names-port-numbers>
235
328
port: integer; what port to announce
236
329
TXT: list of strings; TXT record for the service
237
330
domain: string; Domain to publish on, default to .local if empty.
243
336
server: D-Bus Server
244
337
bus: dbus.SystemBus()
245
338
"""
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):
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):
250
351
self.interface = interface
251
352
self.name = name
252
353
self.type = servicetype
261
362
self.server = None
262
363
self.bus = bus
263
364
self.entry_group_state_changed_match = None
264
def rename(self):
365
366
def rename(self, remove=True):
265
367
"""Derived from the Avahi example code"""
266
368
if self.rename_count >= self.max_renames:
267
369
logger.critical("No suitable Zeroconf service name found"
268
370
" after %i retries, exiting.",
269
371
self.rename_count)
270
372
raise AvahiServiceError("Too many renames")
271
self.name = unicode(self.server
272
.GetAlternativeServiceName(self.name))
373
self.name = str(
374
self.server.GetAlternativeServiceName(self.name))
375
self.rename_count += 1
273
376
logger.info("Changing Zeroconf service name to %r ...",
274
377
self.name)
275
self.remove()
378
if remove:
379
self.remove()
276
380
try:
277
381
self.add()
278
382
except dbus.exceptions.DBusException as error:
279
logger.critical("DBusException: %s", error)
280
self.cleanup()
281
os._exit(1)
282
self.rename_count += 1
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
283
392
def remove(self):
284
393
"""Derived from the Avahi example code"""
285
394
if self.entry_group_state_changed_match is not None:
287
396
self.entry_group_state_changed_match = None
288
397
if self.group is not None:
289
398
self.group.Reset()
399
290
400
def add(self):
291
401
"""Derived from the Avahi example code"""
292
402
self.remove()
309
419
dbus.UInt16(self.port),
310
420
avahi.string_array_to_txt_array(self.TXT))
311
421
self.group.Commit()
422
312
423
def entry_group_state_changed(self, state, error):
313
424
"""Derived from the Avahi example code"""
314
425
logger.debug("Avahi entry group state change: %i", state)
315
426
316
427
if state == avahi.ENTRY_GROUP_ESTABLISHED:
317
428
logger.debug("Zeroconf service established.")
318
429
elif state == avahi.ENTRY_GROUP_COLLISION:
320
431
self.rename()
321
432
elif state == avahi.ENTRY_GROUP_FAILURE:
322
433
logger.critical("Avahi: Error in group state changed %s",
323
unicode(error))
324
raise AvahiGroupError("State changed: %s"
325
% unicode(error))
434
str(error))
435
raise AvahiGroupError("State changed: {!s}".format(error))
436
326
437
def cleanup(self):
327
438
"""Derived from the Avahi example code"""
328
439
if self.group is not None:
333
444
pass
334
445
self.group = None
335
446
self.remove()
447
336
448
def server_state_changed(self, state, error=None):
337
449
"""Derived from the Avahi example code"""
338
450
logger.debug("Avahi server state change: %i", state)
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" }
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
}
346
457
if state in bad_states:
347
458
if bad_states[state] is not None:
348
459
if error is None:
351
462
logger.error(bad_states[state] + ": %r", error)
352
463
self.cleanup()
353
464
elif state == avahi.SERVER_RUNNING:
354
self.add()
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)
355
477
else:
356
478
if error is None:
357
479
logger.debug("Unknown state: %r", state)
358
480
else:
359
481
logger.debug("Unknown state: %r: %r", state, error)
482
360
483
def activate(self):
361
484
"""Derived from the Avahi example code"""
362
485
if self.server is None:
366
489
follow_name_owner_changes=True),
367
490
avahi.DBUS_INTERFACE_SERVER)
368
491
self.server.connect_to_signal("StateChanged",
369
self.server_state_changed)
492
self.server_state_changed)
370
493
self.server_state_changed(self.server.GetState())
371
494
495
372
496
class AvahiServiceToSyslog(AvahiService):
373
def rename(self):
497
def rename(self, *args, **kwargs):
374
498
"""Add the new name to the syslog messages"""
375
ret = AvahiService.rename(self)
376
syslogger.setFormatter(logging.Formatter
377
('Mandos (%s) [%%(process)d]:'
378
' %%(levelname)s: %%(message)s'
379
% self.name))
499
ret = super(AvahiServiceToSyslog, self).rename(self, *args,
500
**kwargs)
501
syslogger.setFormatter(logging.Formatter(
502
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
503
.format(self.name)))
380
504
return ret
381
505
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
506
507
# Pretend that we have a GnuTLS module
508
class GnuTLS(object):
509
"""This isn't so much a class as it is a module-like namespace.
510
It is instantiated once, and simulates having a GnuTLS module."""
511
512
library = ctypes.util.find_library("gnutls")
513
if library is None:
514
library = ctypes.util.find_library("gnutls-deb0")
515
_library = ctypes.cdll.LoadLibrary(library)
516
del library
517
_need_version = b"3.3.0"
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
CLIENT = 2
535
SHUT_RDWR = 0
536
CRD_CERTIFICATE = 1
537
E_NO_CERTIFICATE_FOUND = -49
538
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
539
540
# Types
541
class session_int(ctypes.Structure):
542
_fields_ = []
543
session_t = ctypes.POINTER(session_int)
544
545
class certificate_credentials_st(ctypes.Structure):
546
_fields_ = []
547
certificate_credentials_t = ctypes.POINTER(
548
certificate_credentials_st)
549
certificate_type_t = ctypes.c_int
550
551
class datum_t(ctypes.Structure):
552
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
553
('size', ctypes.c_uint)]
554
555
class openpgp_crt_int(ctypes.Structure):
556
_fields_ = []
557
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
558
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
559
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
560
credentials_type_t = ctypes.c_int
561
transport_ptr_t = ctypes.c_void_p
562
close_request_t = ctypes.c_int
563
564
# Exceptions
565
class Error(Exception):
566
# We need to use the class name "GnuTLS" here, since this
567
# exception might be raised from within GnuTLS.__init__,
568
# which is called before the assignment to the "gnutls"
569
# global variable has happened.
570
def __init__(self, message=None, code=None, args=()):
571
# Default usage is by a message string, but if a return
572
# code is passed, convert it to a string with
573
# gnutls.strerror()
574
self.code = code
575
if message is None and code is not None:
576
message = GnuTLS.strerror(code)
577
return super(GnuTLS.Error, self).__init__(
578
message, *args)
579
580
class CertificateSecurityError(Error):
581
pass
582
583
# Classes
584
class Credentials(object):
585
def __init__(self):
586
self._c_object = gnutls.certificate_credentials_t()
587
gnutls.certificate_allocate_credentials(
588
ctypes.byref(self._c_object))
589
self.type = gnutls.CRD_CERTIFICATE
590
591
def __del__(self):
592
gnutls.certificate_free_credentials(self._c_object)
593
594
class ClientSession(object):
595
def __init__(self, socket, credentials=None):
596
self._c_object = gnutls.session_t()
597
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
598
gnutls.set_default_priority(self._c_object)
599
gnutls.transport_set_ptr(self._c_object, socket.fileno())
600
gnutls.handshake_set_private_extensions(self._c_object,
601
True)
602
self.socket = socket
603
if credentials is None:
604
credentials = gnutls.Credentials()
605
gnutls.credentials_set(self._c_object, credentials.type,
606
ctypes.cast(credentials._c_object,
607
ctypes.c_void_p))
608
self.credentials = credentials
609
610
def __del__(self):
611
gnutls.deinit(self._c_object)
612
613
def handshake(self):
614
return gnutls.handshake(self._c_object)
615
616
def send(self, data):
617
data = bytes(data)
618
data_len = len(data)
619
while data_len > 0:
620
data_len -= gnutls.record_send(self._c_object,
621
data[-data_len:],
622
data_len)
623
624
def bye(self):
625
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
626
627
# Error handling functions
628
def _error_code(result):
629
"""A function to raise exceptions on errors, suitable
630
for the 'restype' attribute on ctypes functions"""
631
if result >= 0:
632
return result
633
if result == gnutls.E_NO_CERTIFICATE_FOUND:
634
raise gnutls.CertificateSecurityError(code=result)
635
raise gnutls.Error(code=result)
636
637
def _retry_on_error(result, func, arguments):
638
"""A function to retry on some errors, suitable
639
for the 'errcheck' attribute on ctypes functions"""
640
while result < 0:
641
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
642
return _error_code(result)
643
result = func(*arguments)
644
return result
645
646
# Unless otherwise indicated, the function declarations below are
647
# all from the gnutls/gnutls.h C header file.
648
649
# Functions
650
priority_set_direct = _library.gnutls_priority_set_direct
651
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
652
ctypes.POINTER(ctypes.c_char_p)]
653
priority_set_direct.restype = _error_code
654
655
init = _library.gnutls_init
656
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
657
init.restype = _error_code
658
659
set_default_priority = _library.gnutls_set_default_priority
660
set_default_priority.argtypes = [session_t]
661
set_default_priority.restype = _error_code
662
663
record_send = _library.gnutls_record_send
664
record_send.argtypes = [session_t, ctypes.c_void_p,
665
ctypes.c_size_t]
666
record_send.restype = ctypes.c_ssize_t
667
record_send.errcheck = _retry_on_error
668
669
certificate_allocate_credentials = (
670
_library.gnutls_certificate_allocate_credentials)
671
certificate_allocate_credentials.argtypes = [
672
ctypes.POINTER(certificate_credentials_t)]
673
certificate_allocate_credentials.restype = _error_code
674
675
certificate_free_credentials = (
676
_library.gnutls_certificate_free_credentials)
677
certificate_free_credentials.argtypes = [
678
certificate_credentials_t]
679
certificate_free_credentials.restype = None
680
681
handshake_set_private_extensions = (
682
_library.gnutls_handshake_set_private_extensions)
683
handshake_set_private_extensions.argtypes = [session_t,
684
ctypes.c_int]
685
handshake_set_private_extensions.restype = None
686
687
credentials_set = _library.gnutls_credentials_set
688
credentials_set.argtypes = [session_t, credentials_type_t,
689
ctypes.c_void_p]
690
credentials_set.restype = _error_code
691
692
strerror = _library.gnutls_strerror
693
strerror.argtypes = [ctypes.c_int]
694
strerror.restype = ctypes.c_char_p
695
696
certificate_type_get = _library.gnutls_certificate_type_get
697
certificate_type_get.argtypes = [session_t]
698
certificate_type_get.restype = _error_code
699
700
certificate_get_peers = _library.gnutls_certificate_get_peers
701
certificate_get_peers.argtypes = [session_t,
702
ctypes.POINTER(ctypes.c_uint)]
703
certificate_get_peers.restype = ctypes.POINTER(datum_t)
704
705
global_set_log_level = _library.gnutls_global_set_log_level
706
global_set_log_level.argtypes = [ctypes.c_int]
707
global_set_log_level.restype = None
708
709
global_set_log_function = _library.gnutls_global_set_log_function
710
global_set_log_function.argtypes = [log_func]
711
global_set_log_function.restype = None
712
713
deinit = _library.gnutls_deinit
714
deinit.argtypes = [session_t]
715
deinit.restype = None
716
717
handshake = _library.gnutls_handshake
718
handshake.argtypes = [session_t]
719
handshake.restype = _error_code
720
handshake.errcheck = _retry_on_error
721
722
transport_set_ptr = _library.gnutls_transport_set_ptr
723
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
724
transport_set_ptr.restype = None
725
726
bye = _library.gnutls_bye
727
bye.argtypes = [session_t, close_request_t]
728
bye.restype = _error_code
729
bye.errcheck = _retry_on_error
730
731
check_version = _library.gnutls_check_version
732
check_version.argtypes = [ctypes.c_char_p]
733
check_version.restype = ctypes.c_char_p
734
735
# All the function declarations below are from gnutls/openpgp.h
736
737
openpgp_crt_init = _library.gnutls_openpgp_crt_init
738
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
739
openpgp_crt_init.restype = _error_code
740
741
openpgp_crt_import = _library.gnutls_openpgp_crt_import
742
openpgp_crt_import.argtypes = [openpgp_crt_t,
743
ctypes.POINTER(datum_t),
744
openpgp_crt_fmt_t]
745
openpgp_crt_import.restype = _error_code
746
747
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
748
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
749
ctypes.POINTER(ctypes.c_uint)]
750
openpgp_crt_verify_self.restype = _error_code
751
752
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
753
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
754
openpgp_crt_deinit.restype = None
755
756
openpgp_crt_get_fingerprint = (
757
_library.gnutls_openpgp_crt_get_fingerprint)
758
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
759
ctypes.c_void_p,
760
ctypes.POINTER(
761
ctypes.c_size_t)]
762
openpgp_crt_get_fingerprint.restype = _error_code
763
764
# Remove non-public functions
765
del _error_code, _retry_on_error
766
# Create the global "gnutls" object, simulating a module
767
gnutls = GnuTLS()
768
769
770
def call_pipe(connection, # : multiprocessing.Connection
771
func, *args, **kwargs):
772
"""This function is meant to be called by multiprocessing.Process
773
774
This function runs func(*args, **kwargs), and writes the resulting
775
return value on the provided multiprocessing.Connection.
776
"""
777
connection.send(func(*args, **kwargs))
778
connection.close()
779
780
388
781
class Client(object):
389
782
"""A representation of a client host served by this server.
390
783
391
784
Attributes:
392
785
approved: bool(); 'None' if not yet approved/disapproved
393
786
approval_delay: datetime.timedelta(); Time to wait for approval
395
788
checker: subprocess.Popen(); a running checker process used
396
789
to see if the client lives.
397
790
'None' if no process is running.
398
checker_callback_tag: a gobject event source tag, or None
791
checker_callback_tag: a GLib event source tag, or None
399
792
checker_command: string; External command which is run to check
400
793
if client lives. %() expansions are done at
401
794
runtime with vars(self) as dict, so that for
402
795
instance %(name)s can be used in the command.
403
checker_initiator_tag: a gobject event source tag, or None
796
checker_initiator_tag: a GLib event source tag, or None
404
797
created: datetime.datetime(); (UTC) object creation
405
798
client_structure: Object describing what attributes a client has
406
799
and is used for storing the client at exit
407
800
current_checker_command: string; current running checker_command
408
disable_initiator_tag: a gobject event source tag, or None
801
disable_initiator_tag: a GLib event source tag, or None
409
802
enabled: bool()
410
803
fingerprint: string (40 or 32 hexadecimal digits); used to
411
804
uniquely identify the client
415
808
last_checked_ok: datetime.datetime(); (UTC) or None
416
809
last_checker_status: integer between 0 and 255 reflecting exit
417
810
status of last checker. -1 reflects crashed
418
checker, or None.
811
checker, -2 means no checker completed yet.
812
last_checker_signal: The signal which killed the last checker, if
813
last_checker_status is -1
419
814
last_enabled: datetime.datetime(); (UTC) or None
420
815
name: string; from the config file, used in log messages and
421
816
D-Bus identifiers
426
821
runtime_expansions: Allowed attributes for runtime expansion.
427
822
expires: datetime.datetime(); time (UTC) when a client will be
428
823
disabled, or None
824
server_settings: The server_settings dict from main()
429
825
"""
430
826
431
827
runtime_expansions = ("approval_delay", "approval_duration",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
828
"created", "enabled", "expires",
829
"fingerprint", "host", "interval",
830
"last_approval_request", "last_checked_ok",
434
831
"last_enabled", "name", "timeout")
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)
832
client_defaults = {
833
"timeout": "PT5M",
834
"extended_timeout": "PT15M",
835
"interval": "PT2M",
836
"checker": "fping -q -- %%(host)s",
837
"host": "",
838
"approval_delay": "PT0S",
839
"approval_duration": "PT1S",
840
"approved_by_default": "True",
841
"enabled": "True",
842
}
460
843
461
844
@staticmethod
462
845
def config_parser(config):
470
853
for client_name in config.sections():
471
854
section = dict(config.items(client_name))
472
855
client = settings[client_name] = {}
473
856
474
857
client["host"] = section["host"]
475
858
# Reformat values from string types to Python types
476
859
client["approved_by_default"] = config.getboolean(
477
860
client_name, "approved_by_default")
478
861
client["enabled"] = config.getboolean(client_name,
479
862
"enabled")
480
863
864
# Uppercase and remove spaces from fingerprint for later
865
# comparison purposes with return value from the
866
# fingerprint() function
481
867
client["fingerprint"] = (section["fingerprint"].upper()
482
868
.replace(" ", ""))
483
869
if "secret" in section:
484
client["secret"] = section["secret"].decode("base64")
870
client["secret"] = codecs.decode(section["secret"]
871
.encode("utf-8"),
872
"base64")
485
873
elif "secfile" in section:
486
874
with open(os.path.expanduser(os.path.expandvars
487
875
(section["secfile"])),
488
876
"rb") as secfile:
489
877
client["secret"] = secfile.read()
490
878
else:
491
raise TypeError("No secret or secfile for section %s"
492
% section)
879
raise TypeError("No secret or secfile for section {}"
880
.format(section))
493
881
client["timeout"] = string_to_delta(section["timeout"])
494
882
client["extended_timeout"] = string_to_delta(
495
883
section["extended_timeout"])
501
889
client["checker_command"] = section["checker"]
502
890
client["last_approval_request"] = None
503
891
client["last_checked_ok"] = None
504
client["last_checker_status"] = None
505
892
client["last_checker_status"] = -2
893
506
894
return settings
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."""
895
896
def __init__(self, settings, name=None, server_settings=None):
513
897
self.name = name
898
if server_settings is None:
899
server_settings = {}
900
self.server_settings = server_settings
514
901
# adding all client settings
515
for setting, value in settings.iteritems():
902
for setting, value in settings.items():
516
903
setattr(self, setting, value)
517
904
518
905
if self.enabled:
519
906
if not hasattr(self, "last_enabled"):
520
907
self.last_enabled = datetime.datetime.utcnow()
524
911
else:
525
912
self.last_enabled = None
526
913
self.expires = None
527
914
528
915
logger.debug("Creating client %r", self.name)
529
# Uppercase and remove spaces from fingerprint for later
530
# comparison purposes with return value from the fingerprint()
531
# function
532
916
logger.debug(" Fingerprint: %s", self.fingerprint)
533
917
self.created = settings.get("created",
534
918
datetime.datetime.utcnow())
541
925
self.current_checker_command = None
542
926
self.approved = None
543
927
self.approvals_pending = 0
544
self.changedstate = (multiprocessing_manager
545
.Condition(multiprocessing_manager
546
.Lock()))
547
self.client_structure = [attr for attr in
548
self.__dict__.iterkeys()
928
self.changedstate = multiprocessing_manager.Condition(
929
multiprocessing_manager.Lock())
930
self.client_structure = [attr
931
for attr in self.__dict__.keys()
549
932
if not attr.startswith("_")]
550
933
self.client_structure.append("client_structure")
551
552
for name, t in inspect.getmembers(type(self),
553
lambda obj:
554
isinstance(obj,
555
property)):
934
935
for name, t in inspect.getmembers(
936
type(self), lambda obj: isinstance(obj, property)):
556
937
if not name.startswith("_"):
557
938
self.client_structure.append(name)
558
939
559
940
# Send notice to process children that client state has changed
560
941
def send_changedstate(self):
561
942
with self.changedstate:
562
943
self.changedstate.notify_all()
563
944
564
945
def enable(self):
565
946
"""Start this client's checker and timeout hooks"""
566
947
if getattr(self, "enabled", False):
567
948
# Already enabled
568
949
return
569
self.send_changedstate()
570
950
self.expires = datetime.datetime.utcnow() + self.timeout
571
951
self.enabled = True
572
952
self.last_enabled = datetime.datetime.utcnow()
573
953
self.init_checker()
574
954
self.send_changedstate()
955
575
956
def disable(self, quiet=True):
576
957
"""Disable this client."""
577
958
if not getattr(self, "enabled", False):
578
959
return False
579
960
if not quiet:
580
self.send_changedstate()
581
if not quiet:
582
961
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", False):
584
gobject.source_remove(self.disable_initiator_tag)
962
if getattr(self, "disable_initiator_tag", None) is not None:
963
GLib.source_remove(self.disable_initiator_tag)
585
964
self.disable_initiator_tag = None
586
965
self.expires = None
587
if getattr(self, "checker_initiator_tag", False):
588
gobject.source_remove(self.checker_initiator_tag)
966
if getattr(self, "checker_initiator_tag", None) is not None:
967
GLib.source_remove(self.checker_initiator_tag)
589
968
self.checker_initiator_tag = None
590
969
self.stop_checker()
591
970
self.enabled = False
592
# Do not run this again if called by a gobject.timeout_add
971
if not quiet:
972
self.send_changedstate()
973
# Do not run this again if called by a GLib.timeout_add
593
974
return False
594
975
595
976
def __del__(self):
596
977
self.disable()
597
978
598
979
def init_checker(self):
599
980
# Schedule a new checker to be started an 'interval' from now,
600
981
# and every interval from then on.
601
self.checker_initiator_tag = (gobject.timeout_add
602
(self.interval_milliseconds(),
603
self.start_checker))
982
if self.checker_initiator_tag is not None:
983
GLib.source_remove(self.checker_initiator_tag)
984
self.checker_initiator_tag = GLib.timeout_add(
985
int(self.interval.total_seconds() * 1000),
986
self.start_checker)
604
987
# Schedule a disable() when 'timeout' has passed
605
self.disable_initiator_tag = (gobject.timeout_add
606
(self.timeout_milliseconds(),
607
self.disable))
988
if self.disable_initiator_tag is not None:
989
GLib.source_remove(self.disable_initiator_tag)
990
self.disable_initiator_tag = GLib.timeout_add(
991
int(self.timeout.total_seconds() * 1000), self.disable)
608
992
# Also start a new checker *right now*.
609
993
self.start_checker()
610
611
def checker_callback(self, pid, condition, command):
994
995
def checker_callback(self, source, condition, connection,
996
command):
612
997
"""The checker has completed, so take appropriate actions."""
613
998
self.checker_callback_tag = None
614
999
self.checker = None
615
if os.WIFEXITED(condition):
616
self.last_checker_status = os.WEXITSTATUS(condition)
1000
# Read return code from connection (see call_pipe)
1001
returncode = connection.recv()
1002
connection.close()
1003
1004
if returncode >= 0:
1005
self.last_checker_status = returncode
1006
self.last_checker_signal = None
617
1007
if self.last_checker_status == 0:
618
1008
logger.info("Checker for %(name)s succeeded",
619
1009
vars(self))
620
1010
self.checked_ok()
621
1011
else:
622
logger.info("Checker for %(name)s failed",
623
vars(self))
1012
logger.info("Checker for %(name)s failed", vars(self))
624
1013
else:
625
1014
self.last_checker_status = -1
1015
self.last_checker_signal = -returncode
626
1016
logger.warning("Checker for %(name)s crashed?",
627
1017
vars(self))
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
"""
1018
return False
1019
1020
def checked_ok(self):
1021
"""Assert that the client has been seen, alive and well."""
1022
self.last_checked_ok = datetime.datetime.utcnow()
1023
self.last_checker_status = 0
1024
self.last_checker_signal = None
1025
self.bump_timeout()
1026
1027
def bump_timeout(self, timeout=None):
1028
"""Bump up the timeout for this client."""
635
1029
if timeout is None:
636
1030
timeout = self.timeout
637
self.last_checked_ok = datetime.datetime.utcnow()
638
1031
if self.disable_initiator_tag is not None:
639
gobject.source_remove(self.disable_initiator_tag)
1032
GLib.source_remove(self.disable_initiator_tag)
1033
self.disable_initiator_tag = None
640
1034
if getattr(self, "enabled", False):
641
self.disable_initiator_tag = (gobject.timeout_add
642
(timedelta_to_milliseconds
643
(timeout), self.disable))
1035
self.disable_initiator_tag = GLib.timeout_add(
1036
int(timeout.total_seconds() * 1000), self.disable)
644
1037
self.expires = datetime.datetime.utcnow() + timeout
645
1038
646
1039
def need_approval(self):
647
1040
self.last_approval_request = datetime.datetime.utcnow()
648
1041
649
1042
def start_checker(self):
650
1043
"""Start a new checker subprocess if one is not running.
651
1044
652
1045
If a checker already exists, leave it running and do
653
1046
nothing."""
654
1047
# The reason for not killing a running checker is that if we
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
1048
# did that, and if a checker (for some reason) started running
1049
# slowly and taking more than 'interval' time, then the client
1050
# would inevitably timeout, since no checker would get a
1051
# chance to run to completion. If we instead leave running
659
1052
# checkers alone, the checker would have to take more time
660
1053
# than 'timeout' for the client to be disabled, which is as it
661
1054
# should be.
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)
1055
1056
if self.checker is not None and not self.checker.is_alive():
1057
logger.warning("Checker was not alive; joining")
1058
self.checker.join()
1059
self.checker = None
676
1060
# Start a new checker if needed
677
1061
if self.checker is None:
1062
# Escape attributes for the shell
1063
escaped_attrs = {
1064
attr: re.escape(str(getattr(self, attr)))
1065
for attr in self.runtime_expansions}
678
1066
try:
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
1067
command = self.checker_command % escaped_attrs
1068
except TypeError as error:
1069
logger.error('Could not format string "%s"',
1070
self.checker_command,
1071
exc_info=error)
1072
return True # Try again later
697
1073
self.current_checker_command = command
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
1074
logger.info("Starting checker %r for %s", command,
1075
self.name)
1076
# We don't need to redirect stdout and stderr, since
1077
# in normal mode, that is already done by daemon(),
1078
# and in debug mode we don't want to. (Stdin is
1079
# always replaced by /dev/null.)
1080
# The exception is when not debugging but nevertheless
1081
# running in the foreground; use the previously
1082
# created wnull.
1083
popen_args = {"close_fds": True,
1084
"shell": True,
1085
"cwd": "/"}
1086
if (not self.server_settings["debug"]
1087
and self.server_settings["foreground"]):
1088
popen_args.update({"stdout": wnull,
1089
"stderr": wnull})
1090
pipe = multiprocessing.Pipe(duplex=False)
1091
self.checker = multiprocessing.Process(
1092
target=call_pipe,
1093
args=(pipe[1], subprocess.call, command),
1094
kwargs=popen_args)
1095
self.checker.start()
1096
self.checker_callback_tag = GLib.io_add_watch(
1097
pipe[0].fileno(), GLib.IO_IN,
1098
self.checker_callback, pipe[0], command)
1099
# Re-run this periodically if run by GLib.timeout_add
722
1100
return True
723
1101
724
1102
def stop_checker(self):
725
1103
"""Force the checker process, if any, to stop."""
726
1104
if self.checker_callback_tag:
727
gobject.source_remove(self.checker_callback_tag)
1105
GLib.source_remove(self.checker_callback_tag)
728
1106
self.checker_callback_tag = None
729
1107
if getattr(self, "checker", None) is None:
730
1108
return
731
1109
logger.debug("Stopping checker for %(name)s", vars(self))
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
1110
self.checker.terminate()
740
1111
self.checker = None
741
1112
742
1113
743
def dbus_service_property(dbus_interface, signature="v",
744
access="readwrite", byte_arrays=False):
1114
def dbus_service_property(dbus_interface,
1115
signature="v",
1116
access="readwrite",
1117
byte_arrays=False):
745
1118
"""Decorators for marking methods of a DBusObjectWithProperties to
746
1119
become properties on the D-Bus.
747
1120
748
1121
The decorated method will be called with no arguments by "Get"
749
1122
and with one argument by "Set".
750
1123
751
1124
The parameters, where they are supported, are the same as
752
1125
dbus.service.method, except there is only "signature", since the
753
1126
type from Get() and the type sent to Set() is the same.
756
1129
# "Set" method, so we fail early here:
757
1130
if byte_arrays and signature != "ay":
758
1131
raise ValueError("Byte arrays not supported for non-'ay'"
759
" signature %r" % signature)
1132
" signature {!r}".format(signature))
1133
760
1134
def decorator(func):
761
1135
func._dbus_is_property = True
762
1136
func._dbus_interface = dbus_interface
765
1139
func._dbus_name = func.__name__
766
1140
if func._dbus_name.endswith("_dbus_property"):
767
1141
func._dbus_name = func._dbus_name[:-14]
768
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
769
return func
1142
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1143
return func
1144
1145
return decorator
1146
1147
1148
def dbus_interface_annotations(dbus_interface):
1149
"""Decorator for marking functions returning interface annotations
1150
1151
Usage:
1152
1153
@dbus_interface_annotations("org.example.Interface")
1154
def _foo(self): # Function name does not matter
1155
return {"org.freedesktop.DBus.Deprecated": "true",
1156
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1157
"false"}
1158
"""
1159
1160
def decorator(func):
1161
func._dbus_is_interface = True
1162
func._dbus_interface = dbus_interface
1163
func._dbus_name = dbus_interface
1164
return func
1165
1166
return decorator
1167
1168
1169
def dbus_annotations(annotations):
1170
"""Decorator to annotate D-Bus methods, signals or properties
1171
Usage:
1172
1173
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1174
"org.freedesktop.DBus.Property."
1175
"EmitsChangedSignal": "false"})
1176
@dbus_service_property("org.example.Interface", signature="b",
1177
access="r")
1178
def Property_dbus_property(self):
1179
return dbus.Boolean(False)
1180
1181
See also the DBusObjectWithAnnotations class.
1182
"""
1183
1184
def decorator(func):
1185
func._dbus_annotations = annotations
1186
return func
1187
770
1188
return decorator
771
1189
772
1190
773
1191
class DBusPropertyException(dbus.exceptions.DBusException):
774
1192
"""A base class for D-Bus property-related exceptions
775
1193
"""
776
def __unicode__(self):
777
return unicode(str(self))
1194
pass
778
1195
779
1196
780
1197
class DBusPropertyAccessException(DBusPropertyException):
789
1206
pass
790
1207
791
1208
792
class DBusObjectWithProperties(dbus.service.Object):
1209
class DBusObjectWithAnnotations(dbus.service.Object):
1210
"""A D-Bus object with annotations.
1211
1212
Classes inheriting from this can use the dbus_annotations
1213
decorator to add annotations to methods or signals.
1214
"""
1215
1216
@staticmethod
1217
def _is_dbus_thing(thing):
1218
"""Returns a function testing if an attribute is a D-Bus thing
1219
1220
If called like _is_dbus_thing("method") it returns a function
1221
suitable for use as predicate to inspect.getmembers().
1222
"""
1223
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1224
False)
1225
1226
def _get_all_dbus_things(self, thing):
1227
"""Returns a generator of (name, attribute) pairs
1228
"""
1229
return ((getattr(athing.__get__(self), "_dbus_name", name),
1230
athing.__get__(self))
1231
for cls in self.__class__.__mro__
1232
for name, athing in
1233
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1234
1235
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1236
out_signature="s",
1237
path_keyword='object_path',
1238
connection_keyword='connection')
1239
def Introspect(self, object_path, connection):
1240
"""Overloading of standard D-Bus method.
1241
1242
Inserts annotation tags on methods and signals.
1243
"""
1244
xmlstring = dbus.service.Object.Introspect(self, object_path,
1245
connection)
1246
try:
1247
document = xml.dom.minidom.parseString(xmlstring)
1248
1249
for if_tag in document.getElementsByTagName("interface"):
1250
# Add annotation tags
1251
for typ in ("method", "signal"):
1252
for tag in if_tag.getElementsByTagName(typ):
1253
annots = dict()
1254
for name, prop in (self.
1255
_get_all_dbus_things(typ)):
1256
if (name == tag.getAttribute("name")
1257
and prop._dbus_interface
1258
== if_tag.getAttribute("name")):
1259
annots.update(getattr(
1260
prop, "_dbus_annotations", {}))
1261
for name, value in annots.items():
1262
ann_tag = document.createElement(
1263
"annotation")
1264
ann_tag.setAttribute("name", name)
1265
ann_tag.setAttribute("value", value)
1266
tag.appendChild(ann_tag)
1267
# Add interface annotation tags
1268
for annotation, value in dict(
1269
itertools.chain.from_iterable(
1270
annotations().items()
1271
for name, annotations
1272
in self._get_all_dbus_things("interface")
1273
if name == if_tag.getAttribute("name")
1274
)).items():
1275
ann_tag = document.createElement("annotation")
1276
ann_tag.setAttribute("name", annotation)
1277
ann_tag.setAttribute("value", value)
1278
if_tag.appendChild(ann_tag)
1279
# Fix argument name for the Introspect method itself
1280
if (if_tag.getAttribute("name")
1281
== dbus.INTROSPECTABLE_IFACE):
1282
for cn in if_tag.getElementsByTagName("method"):
1283
if cn.getAttribute("name") == "Introspect":
1284
for arg in cn.getElementsByTagName("arg"):
1285
if (arg.getAttribute("direction")
1286
== "out"):
1287
arg.setAttribute("name",
1288
"xml_data")
1289
xmlstring = document.toxml("utf-8")
1290
document.unlink()
1291
except (AttributeError, xml.dom.DOMException,
1292
xml.parsers.expat.ExpatError) as error:
1293
logger.error("Failed to override Introspection method",
1294
exc_info=error)
1295
return xmlstring
1296
1297
1298
class DBusObjectWithProperties(DBusObjectWithAnnotations):
793
1299
"""A D-Bus object with properties.
794
1300
795
1301
Classes inheriting from this can use the dbus_service_property
796
1302
decorator to expose methods as D-Bus properties. It exposes the
797
1303
standard Get(), Set(), and GetAll() methods on the D-Bus.
798
1304
"""
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
1305
812
1306
def _get_dbus_property(self, interface_name, property_name):
813
1307
"""Returns a bound method if one exists which is a D-Bus
814
1308
property with the specified name and interface.
815
1309
"""
816
for cls in self.__class__.__mro__:
817
for name, value in (inspect.getmembers
818
(cls, self._is_dbus_property)):
1310
for cls in self.__class__.__mro__:
1311
for name, value in inspect.getmembers(
1312
cls, self._is_dbus_thing("property")):
819
1313
if (value._dbus_name == property_name
820
1314
and value._dbus_interface == interface_name):
821
1315
return value.__get__(self)
822
1316
823
1317
# No such property
824
raise DBusPropertyNotFound(self.dbus_object_path + ":"
825
+ interface_name + "."
826
+ property_name)
827
828
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1318
raise DBusPropertyNotFound("{}:{}.{}".format(
1319
self.dbus_object_path, interface_name, property_name))
1320
1321
@classmethod
1322
def _get_all_interface_names(cls):
1323
"""Get a sequence of all interfaces supported by an object"""
1324
return (name for name in set(getattr(getattr(x, attr),
1325
"_dbus_interface", None)
1326
for x in (inspect.getmro(cls))
1327
for attr in dir(x))
1328
if name is not None)
1329
1330
@dbus.service.method(dbus.PROPERTIES_IFACE,
1331
in_signature="ss",
829
1332
out_signature="v")
830
1333
def Get(self, interface_name, property_name):
831
1334
"""Standard D-Bus property Get() method, see D-Bus standard.
837
1340
if not hasattr(value, "variant_level"):
838
1341
return value
839
1342
return type(value)(value, variant_level=value.variant_level+1)
840
1343
841
1344
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
842
1345
def Set(self, interface_name, property_name, value):
843
1346
"""Standard D-Bus property Set() method, see D-Bus standard.
849
1352
# The byte_arrays option is not supported yet on
850
1353
# signatures other than "ay".
851
1354
if prop._dbus_signature != "ay":
852
raise ValueError
1355
raise ValueError("Byte arrays not supported for non-"
1356
"'ay' signature {!r}"
1357
.format(prop._dbus_signature))
853
1358
value = dbus.ByteArray(b''.join(chr(byte)
854
1359
for byte in value))
855
1360
prop(value)
856
857
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1361
1362
@dbus.service.method(dbus.PROPERTIES_IFACE,
1363
in_signature="s",
858
1364
out_signature="a{sv}")
859
1365
def GetAll(self, interface_name):
860
1366
"""Standard D-Bus property GetAll() method, see D-Bus
861
1367
standard.
862
1368
863
1369
Note: Will not include properties with access="write".
864
1370
"""
865
1371
properties = {}
866
for name, prop in self._get_all_dbus_properties():
1372
for name, prop in self._get_all_dbus_things("property"):
867
1373
if (interface_name
868
1374
and interface_name != prop._dbus_interface):
869
1375
# Interface non-empty but did not match
875
1381
if not hasattr(value, "variant_level"):
876
1382
properties[name] = value
877
1383
continue
878
properties[name] = type(value)(value, variant_level=
879
value.variant_level+1)
1384
properties[name] = type(value)(
1385
value, variant_level=value.variant_level + 1)
880
1386
return dbus.Dictionary(properties, signature="sv")
881
1387
1388
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1389
def PropertiesChanged(self, interface_name, changed_properties,
1390
invalidated_properties):
1391
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1392
standard.
1393
"""
1394
pass
1395
882
1396
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
883
1397
out_signature="s",
884
1398
path_keyword='object_path',
885
1399
connection_keyword='connection')
886
1400
def Introspect(self, object_path, connection):
887
"""Standard D-Bus method, overloaded to insert property tags.
1401
"""Overloading of standard D-Bus method.
1402
1403
Inserts property tags and interface annotation tags.
888
1404
"""
889
xmlstring = dbus.service.Object.Introspect(self, object_path,
890
connection)
1405
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1406
object_path,
1407
connection)
891
1408
try:
892
1409
document = xml.dom.minidom.parseString(xmlstring)
1410
893
1411
def make_tag(document, name, prop):
894
1412
e = document.createElement("property")
895
1413
e.setAttribute("name", name)
896
1414
e.setAttribute("type", prop._dbus_signature)
897
1415
e.setAttribute("access", prop._dbus_access)
898
1416
return e
1417
899
1418
for if_tag in document.getElementsByTagName("interface"):
1419
# Add property tags
900
1420
for tag in (make_tag(document, name, prop)
901
1421
for name, prop
902
in self._get_all_dbus_properties()
1422
in self._get_all_dbus_things("property")
903
1423
if prop._dbus_interface
904
1424
== if_tag.getAttribute("name")):
905
1425
if_tag.appendChild(tag)
1426
# Add annotation tags for properties
1427
for tag in if_tag.getElementsByTagName("property"):
1428
annots = dict()
1429
for name, prop in self._get_all_dbus_things(
1430
"property"):
1431
if (name == tag.getAttribute("name")
1432
and prop._dbus_interface
1433
== if_tag.getAttribute("name")):
1434
annots.update(getattr(
1435
prop, "_dbus_annotations", {}))
1436
for name, value in annots.items():
1437
ann_tag = document.createElement(
1438
"annotation")
1439
ann_tag.setAttribute("name", name)
1440
ann_tag.setAttribute("value", value)
1441
tag.appendChild(ann_tag)
906
1442
# Add the names to the return values for the
907
1443
# "org.freedesktop.DBus.Properties" methods
908
1444
if (if_tag.getAttribute("name")
923
1459
except (AttributeError, xml.dom.DOMException,
924
1460
xml.parsers.expat.ExpatError) as error:
925
1461
logger.error("Failed to override Introspection method",
926
error)
927
return xmlstring
928
929
930
def datetime_to_dbus (dt, variant_level=0):
1462
exc_info=error)
1463
return xmlstring
1464
1465
1466
try:
1467
dbus.OBJECT_MANAGER_IFACE
1468
except AttributeError:
1469
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1470
1471
1472
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1473
"""A D-Bus object with an ObjectManager.
1474
1475
Classes inheriting from this exposes the standard
1476
GetManagedObjects call and the InterfacesAdded and
1477
InterfacesRemoved signals on the standard
1478
"org.freedesktop.DBus.ObjectManager" interface.
1479
1480
Note: No signals are sent automatically; they must be sent
1481
manually.
1482
"""
1483
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1484
out_signature="a{oa{sa{sv}}}")
1485
def GetManagedObjects(self):
1486
"""This function must be overridden"""
1487
raise NotImplementedError()
1488
1489
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1490
signature="oa{sa{sv}}")
1491
def InterfacesAdded(self, object_path, interfaces_and_properties):
1492
pass
1493
1494
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1495
def InterfacesRemoved(self, object_path, interfaces):
1496
pass
1497
1498
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1499
out_signature="s",
1500
path_keyword='object_path',
1501
connection_keyword='connection')
1502
def Introspect(self, object_path, connection):
1503
"""Overloading of standard D-Bus method.
1504
1505
Override return argument name of GetManagedObjects to be
1506
"objpath_interfaces_and_properties"
1507
"""
1508
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1509
object_path,
1510
connection)
1511
try:
1512
document = xml.dom.minidom.parseString(xmlstring)
1513
1514
for if_tag in document.getElementsByTagName("interface"):
1515
# Fix argument name for the GetManagedObjects method
1516
if (if_tag.getAttribute("name")
1517
== dbus.OBJECT_MANAGER_IFACE):
1518
for cn in if_tag.getElementsByTagName("method"):
1519
if (cn.getAttribute("name")
1520
== "GetManagedObjects"):
1521
for arg in cn.getElementsByTagName("arg"):
1522
if (arg.getAttribute("direction")
1523
== "out"):
1524
arg.setAttribute(
1525
"name",
1526
"objpath_interfaces"
1527
"_and_properties")
1528
xmlstring = document.toxml("utf-8")
1529
document.unlink()
1530
except (AttributeError, xml.dom.DOMException,
1531
xml.parsers.expat.ExpatError) as error:
1532
logger.error("Failed to override Introspection method",
1533
exc_info=error)
1534
return xmlstring
1535
1536
1537
def datetime_to_dbus(dt, variant_level=0):
931
1538
"""Convert a UTC datetime.datetime() to a D-Bus type."""
932
1539
if dt is None:
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.
1540
return dbus.String("", variant_level=variant_level)
1541
return dbus.String(dt.isoformat(), variant_level=variant_level)
1542
1543
1544
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1545
"""A class decorator; applied to a subclass of
1546
dbus.service.Object, it will add alternate D-Bus attributes with
1547
interface names according to the "alt_interface_names" mapping.
1548
Usage:
1549
1550
@alternate_dbus_interfaces({"org.example.Interface":
1551
"net.example.AlternateInterface"})
1552
class SampleDBusObject(dbus.service.Object):
1553
@dbus.service.method("org.example.Interface")
1554
def SampleDBusMethod():
1555
pass
1556
1557
The above "SampleDBusMethod" on "SampleDBusObject" will be
1558
reachable via two interfaces: "org.example.Interface" and
1559
"net.example.AlternateInterface", the latter of which will have
1560
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1561
"true", unless "deprecate" is passed with a False value.
1562
1563
This works for methods and signals, and also for D-Bus properties
1564
(from DBusObjectWithProperties) and interfaces (from the
1565
dbus_interface_annotations decorator).
942
1566
"""
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):
1567
1568
def wrapper(cls):
1569
for orig_interface_name, alt_interface_name in (
1570
alt_interface_names.items()):
1571
attr = {}
1572
interface_names = set()
1573
# Go though all attributes of the class
1574
for attrname, attribute in inspect.getmembers(cls):
950
1575
# Ignore non-D-Bus attributes, and D-Bus attributes
951
1576
# with the wrong interface name
952
1577
if (not hasattr(attribute, "_dbus_interface")
953
or not attribute._dbus_interface
954
.startswith("se.recompile.Mandos")):
1578
or not attribute._dbus_interface.startswith(
1579
orig_interface_name)):
955
1580
continue
956
1581
# Create an alternate D-Bus interface name based on
957
1582
# the current name
958
alt_interface = (attribute._dbus_interface
959
.replace("se.recompile.Mandos",
960
"se.bsnet.fukt.Mandos"))
1583
alt_interface = attribute._dbus_interface.replace(
1584
orig_interface_name, alt_interface_name)
1585
interface_names.add(alt_interface)
961
1586
# Is this a D-Bus signal?
962
1587
if getattr(attribute, "_dbus_is_signal", False):
963
# Extract the original non-method function by
964
# black magic
965
nonmethod_func = (dict(
1588
# Extract the original non-method undecorated
1589
# function by black magic
1590
if sys.version_info.major == 2:
1591
nonmethod_func = (dict(
966
1592
zip(attribute.func_code.co_freevars,
967
attribute.__closure__))["func"]
968
.cell_contents)
1593
attribute.__closure__))
1594
["func"].cell_contents)
1595
else:
1596
nonmethod_func = (dict(
1597
zip(attribute.__code__.co_freevars,
1598
attribute.__closure__))
1599
["func"].cell_contents)
969
1600
# Create a new, but exactly alike, function
970
1601
# object, and decorate it to be a new D-Bus signal
971
1602
# with the alternate D-Bus interface name
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)))
1603
new_function = copy_function(nonmethod_func)
1604
new_function = (dbus.service.signal(
1605
alt_interface,
1606
attribute._dbus_signature)(new_function))
1607
# Copy annotations, if any
1608
try:
1609
new_function._dbus_annotations = dict(
1610
attribute._dbus_annotations)
1611
except AttributeError:
1612
pass
1613
981
1614
# Define a creator of a function to call both the
982
# old and new functions, so both the old and new
983
# signals gets sent when the function is called
1615
# original and alternate functions, so both the
1616
# original and alternate signals gets sent when
1617
# the function is called
984
1618
def fixscope(func1, func2):
985
1619
"""This function is a scope container to pass
986
1620
func1 and func2 to the "call_both" function
987
1621
outside of its arguments"""
1622
1623
@functools.wraps(func2)
988
1624
def call_both(*args, **kwargs):
989
1625
"""This function will emit two D-Bus
990
1626
signals by calling func1 and func2"""
991
1627
func1(*args, **kwargs)
992
1628
func2(*args, **kwargs)
1629
# Make wrapper function look like a D-Bus
1630
# signal
1631
for name, attr in inspect.getmembers(func2):
1632
if name.startswith("_dbus_"):
1633
setattr(call_both, name, attr)
1634
993
1635
return call_both
994
1636
# Create the "call_both" function and add it to
995
1637
# the class
996
attr[attrname] = fixscope(attribute,
997
new_function)
1638
attr[attrname] = fixscope(attribute, new_function)
998
1639
# Is this a D-Bus method?
999
1640
elif getattr(attribute, "_dbus_is_method", False):
1000
1641
# Create a new, but exactly alike, function
1001
1642
# object. Decorate it to be a new D-Bus method
1002
1643
# with the alternate D-Bus interface name. Add it
1003
1644
# to the class.
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)))
1645
attr[attrname] = (
1646
dbus.service.method(
1647
alt_interface,
1648
attribute._dbus_in_signature,
1649
attribute._dbus_out_signature)
1650
(copy_function(attribute)))
1651
# Copy annotations, if any
1652
try:
1653
attr[attrname]._dbus_annotations = dict(
1654
attribute._dbus_annotations)
1655
except AttributeError:
1656
pass
1014
1657
# Is this a D-Bus property?
1015
1658
elif getattr(attribute, "_dbus_is_property", False):
1016
1659
# Create a new, but exactly alike, function
1017
1660
# object, and decorate it to be a new D-Bus
1018
1661
# property with the alternate D-Bus interface
1019
1662
# name. Add it to the class.
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
1663
attr[attrname] = (dbus_service_property(
1664
alt_interface, attribute._dbus_signature,
1665
attribute._dbus_access,
1666
attribute._dbus_get_args_options
1667
["byte_arrays"])
1668
(copy_function(attribute)))
1669
# Copy annotations, if any
1670
try:
1671
attr[attrname]._dbus_annotations = dict(
1672
attribute._dbus_annotations)
1673
except AttributeError:
1674
pass
1675
# Is this a D-Bus interface?
1676
elif getattr(attribute, "_dbus_is_interface", False):
1677
# Create a new, but exactly alike, function
1678
# object. Decorate it to be a new D-Bus interface
1679
# with the alternate D-Bus interface name. Add it
1680
# to the class.
1681
attr[attrname] = (
1682
dbus_interface_annotations(alt_interface)
1683
(copy_function(attribute)))
1684
if deprecate:
1685
# Deprecate all alternate interfaces
1686
iname = "_AlternateDBusNames_interface_annotation{}"
1687
for interface_name in interface_names:
1688
1689
@dbus_interface_annotations(interface_name)
1690
def func(self):
1691
return {"org.freedesktop.DBus.Deprecated":
1692
"true"}
1693
# Find an unused name
1694
for aname in (iname.format(i)
1695
for i in itertools.count()):
1696
if aname not in attr:
1697
attr[aname] = func
1698
break
1699
if interface_names:
1700
# Replace the class with a new subclass of it with
1701
# methods, signals, etc. as created above.
1702
if sys.version_info.major == 2:
1703
cls = type(b"{}Alternate".format(cls.__name__),
1704
(cls, ), attr)
1705
else:
1706
cls = type("{}Alternate".format(cls.__name__),
1707
(cls, ), attr)
1708
return cls
1709
1710
return wrapper
1711
1712
1713
@alternate_dbus_interfaces({"se.recompile.Mandos":
1714
"se.bsnet.fukt.Mandos"})
1036
1715
class ClientDBus(Client, DBusObjectWithProperties):
1037
1716
"""A Client class using D-Bus
1038
1717
1039
1718
Attributes:
1040
1719
dbus_object_path: dbus.ObjectPath
1041
1720
bus: dbus.SystemBus()
1042
1721
"""
1043
1722
1044
1723
runtime_expansions = (Client.runtime_expansions
1045
+ ("dbus_object_path",))
1046
1724
+ ("dbus_object_path", ))
1725
1726
_interface = "se.recompile.Mandos.Client"
1727
1047
1728
# dbus.service.Object doesn't use super(), so we can't either.
1048
1049
def __init__(self, bus = None, *args, **kwargs):
1729
1730
def __init__(self, bus=None, *args, **kwargs):
1050
1731
self.bus = bus
1051
1732
Client.__init__(self, *args, **kwargs)
1052
1733
# Only now, when this client is initialized, can it show up on
1053
1734
# the D-Bus
1054
client_object_name = unicode(self.name).translate(
1735
client_object_name = str(self.name).translate(
1055
1736
{ord("."): ord("_"),
1056
1737
ord("-"): ord("_")})
1057
self.dbus_object_path = (dbus.ObjectPath
1058
("/clients/" + client_object_name))
1738
self.dbus_object_path = dbus.ObjectPath(
1739
"/clients/" + client_object_name)
1059
1740
DBusObjectWithProperties.__init__(self, self.bus,
1060
1741
self.dbus_object_path)
1061
1062
def notifychangeproperty(transform_func,
1063
dbus_name, type_func=lambda x: x,
1064
variant_level=1):
1742
1743
def notifychangeproperty(transform_func, dbus_name,
1744
type_func=lambda x: x,
1745
variant_level=1,
1746
invalidate_only=False,
1747
_interface=_interface):
1065
1748
""" Modify a variable so that it's a property which announces
1066
1749
its changes to DBus.
1067
1750
1068
1751
transform_fun: Function that takes a value and a variant_level
1069
1752
and transforms it to a D-Bus type.
1070
1753
dbus_name: D-Bus name of the variable
1072
1755
to the D-Bus. Default: no transform
1073
1756
variant_level: D-Bus variant level. Default: 1
1074
1757
"""
1075
attrname = "_{0}".format(dbus_name)
1758
attrname = "_{}".format(dbus_name)
1759
1076
1760
def setter(self, value):
1077
1761
if hasattr(self, "dbus_object_path"):
1078
1762
if (not hasattr(self, attrname) or
1079
1763
type_func(getattr(self, attrname, None))
1080
1764
!= type_func(value)):
1081
dbus_value = transform_func(type_func(value),
1082
variant_level
1083
=variant_level)
1084
self.PropertyChanged(dbus.String(dbus_name),
1085
dbus_value)
1765
if invalidate_only:
1766
self.PropertiesChanged(
1767
_interface, dbus.Dictionary(),
1768
dbus.Array((dbus_name, )))
1769
else:
1770
dbus_value = transform_func(
1771
type_func(value),
1772
variant_level=variant_level)
1773
self.PropertyChanged(dbus.String(dbus_name),
1774
dbus_value)
1775
self.PropertiesChanged(
1776
_interface,
1777
dbus.Dictionary({dbus.String(dbus_name):
1778
dbus_value}),
1779
dbus.Array())
1086
1780
setattr(self, attrname, value)
1087
1781
1088
1782
return property(lambda self: getattr(self, attrname), setter)
1089
1090
1783
1091
1784
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1092
1785
approvals_pending = notifychangeproperty(dbus.Boolean,
1093
1786
"ApprovalPending",
1094
type_func = bool)
1787
type_func=bool)
1095
1788
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1096
1789
last_enabled = notifychangeproperty(datetime_to_dbus,
1097
1790
"LastEnabled")
1098
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1099
type_func = lambda checker:
1100
checker is not None)
1791
checker = notifychangeproperty(
1792
dbus.Boolean, "CheckerRunning",
1793
type_func=lambda checker: checker is not None)
1101
1794
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1102
1795
"LastCheckedOK")
1796
last_checker_status = notifychangeproperty(dbus.Int16,
1797
"LastCheckerStatus")
1103
1798
last_approval_request = notifychangeproperty(
1104
1799
datetime_to_dbus, "LastApprovalRequest")
1105
1800
approved_by_default = notifychangeproperty(dbus.Boolean,
1106
1801
"ApprovedByDefault")
1107
approval_delay = notifychangeproperty(dbus.UInt64,
1108
"ApprovalDelay",
1109
type_func =
1110
timedelta_to_milliseconds)
1802
approval_delay = notifychangeproperty(
1803
dbus.UInt64, "ApprovalDelay",
1804
type_func=lambda td: td.total_seconds() * 1000)
1111
1805
approval_duration = notifychangeproperty(
1112
1806
dbus.UInt64, "ApprovalDuration",
1113
type_func = timedelta_to_milliseconds)
1807
type_func=lambda td: td.total_seconds() * 1000)
1114
1808
host = notifychangeproperty(dbus.String, "Host")
1115
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1116
type_func =
1117
timedelta_to_milliseconds)
1809
timeout = notifychangeproperty(
1810
dbus.UInt64, "Timeout",
1811
type_func=lambda td: td.total_seconds() * 1000)
1118
1812
extended_timeout = notifychangeproperty(
1119
1813
dbus.UInt64, "ExtendedTimeout",
1120
type_func = timedelta_to_milliseconds)
1121
interval = notifychangeproperty(dbus.UInt64,
1122
"Interval",
1123
type_func =
1124
timedelta_to_milliseconds)
1814
type_func=lambda td: td.total_seconds() * 1000)
1815
interval = notifychangeproperty(
1816
dbus.UInt64, "Interval",
1817
type_func=lambda td: td.total_seconds() * 1000)
1125
1818
checker_command = notifychangeproperty(dbus.String, "Checker")
1126
1819
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1820
invalidate_only=True)
1821
1127
1822
del notifychangeproperty
1128
1823
1129
1824
def __del__(self, *args, **kwargs):
1130
1825
try:
1131
1826
self.remove_from_connection()
1134
1829
if hasattr(DBusObjectWithProperties, "__del__"):
1135
1830
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1136
1831
Client.__del__(self, *args, **kwargs)
1137
1138
def checker_callback(self, pid, condition, command,
1139
*args, **kwargs):
1140
self.checker_callback_tag = None
1141
self.checker = None
1142
if os.WIFEXITED(condition):
1143
exitstatus = os.WEXITSTATUS(condition)
1832
1833
def checker_callback(self, source, condition,
1834
connection, command, *args, **kwargs):
1835
ret = Client.checker_callback(self, source, condition,
1836
connection, command, *args,
1837
**kwargs)
1838
exitstatus = self.last_checker_status
1839
if exitstatus >= 0:
1144
1840
# Emit D-Bus signal
1145
1841
self.CheckerCompleted(dbus.Int16(exitstatus),
1146
dbus.Int64(condition),
1842
# This is specific to GNU libC
1843
dbus.Int64(exitstatus << 8),
1147
1844
dbus.String(command))
1148
1845
else:
1149
1846
# Emit D-Bus signal
1150
1847
self.CheckerCompleted(dbus.Int16(-1),
1151
dbus.Int64(condition),
1848
dbus.Int64(
1849
# This is specific to GNU libC
1850
(exitstatus << 8)
1851
| self.last_checker_signal),
1152
1852
dbus.String(command))
1153
1154
return Client.checker_callback(self, pid, condition, command,
1155
*args, **kwargs)
1156
1853
return ret
1854
1157
1855
def start_checker(self, *args, **kwargs):
1158
old_checker = self.checker
1159
if self.checker is not None:
1160
old_checker_pid = self.checker.pid
1161
else:
1162
old_checker_pid = None
1856
old_checker_pid = getattr(self.checker, "pid", None)
1163
1857
r = Client.start_checker(self, *args, **kwargs)
1164
1858
# Only if new checker process was started
1165
1859
if (self.checker is not None
1167
1861
# Emit D-Bus signal
1168
1862
self.CheckerStarted(self.current_checker_command)
1169
1863
return r
1170
1864
1171
1865
def _reset_approved(self):
1172
1866
self.approved = None
1173
1867
return False
1174
1868
1175
1869
def approve(self, value=True):
1176
self.send_changedstate()
1177
1870
self.approved = value
1178
gobject.timeout_add(timedelta_to_milliseconds
1179
(self.approval_duration),
1180
self._reset_approved)
1181
1182
1183
## D-Bus methods, signals & properties
1184
_interface = "se.recompile.Mandos.Client"
1185
1186
## Signals
1187
1871
GLib.timeout_add(int(self.approval_duration.total_seconds()
1872
* 1000), self._reset_approved)
1873
self.send_changedstate()
1874
1875
# D-Bus methods, signals & properties
1876
1877
# Interfaces
1878
1879
# Signals
1880
1188
1881
# CheckerCompleted - signal
1189
1882
@dbus.service.signal(_interface, signature="nxs")
1190
1883
def CheckerCompleted(self, exitcode, waitstatus, command):
1191
1884
"D-Bus signal"
1192
1885
pass
1193
1886
1194
1887
# CheckerStarted - signal
1195
1888
@dbus.service.signal(_interface, signature="s")
1196
1889
def CheckerStarted(self, command):
1197
1890
"D-Bus signal"
1198
1891
pass
1199
1892
1200
1893
# PropertyChanged - signal
1894
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1201
1895
@dbus.service.signal(_interface, signature="sv")
1202
1896
def PropertyChanged(self, property, value):
1203
1897
"D-Bus signal"
1204
1898
pass
1205
1899
1206
1900
# GotSecret - signal
1207
1901
@dbus.service.signal(_interface)
1208
1902
def GotSecret(self):
1211
1905
server to mandos-client
1212
1906
"""
1213
1907
pass
1214
1908
1215
1909
# Rejected - signal
1216
1910
@dbus.service.signal(_interface, signature="s")
1217
1911
def Rejected(self, reason):
1218
1912
"D-Bus signal"
1219
1913
pass
1220
1914
1221
1915
# NeedApproval - signal
1222
1916
@dbus.service.signal(_interface, signature="tb")
1223
1917
def NeedApproval(self, timeout, default):
1224
1918
"D-Bus signal"
1225
1919
return self.need_approval()
1226
1227
## Methods
1228
1920
1921
# Methods
1922
1229
1923
# Approve - method
1230
1924
@dbus.service.method(_interface, in_signature="b")
1231
1925
def Approve(self, value):
1232
1926
self.approve(value)
1233
1927
1234
1928
# CheckedOK - method
1235
1929
@dbus.service.method(_interface)
1236
1930
def CheckedOK(self):
1237
1931
self.checked_ok()
1238
1932
1239
1933
# Enable - method
1934
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1240
1935
@dbus.service.method(_interface)
1241
1936
def Enable(self):
1242
1937
"D-Bus method"
1243
1938
self.enable()
1244
1939
1245
1940
# StartChecker - method
1941
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1246
1942
@dbus.service.method(_interface)
1247
1943
def StartChecker(self):
1248
1944
"D-Bus method"
1249
1945
self.start_checker()
1250
1946
1251
1947
# Disable - method
1948
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1252
1949
@dbus.service.method(_interface)
1253
1950
def Disable(self):
1254
1951
"D-Bus method"
1255
1952
self.disable()
1256
1953
1257
1954
# StopChecker - method
1955
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1258
1956
@dbus.service.method(_interface)
1259
1957
def StopChecker(self):
1260
1958
self.stop_checker()
1261
1262
## Properties
1263
1959
1960
# Properties
1961
1264
1962
# ApprovalPending - property
1265
1963
@dbus_service_property(_interface, signature="b", access="read")
1266
1964
def ApprovalPending_dbus_property(self):
1267
1965
return dbus.Boolean(bool(self.approvals_pending))
1268
1966
1269
1967
# ApprovedByDefault - property
1270
@dbus_service_property(_interface, signature="b",
1968
@dbus_service_property(_interface,
1969
signature="b",
1271
1970
access="readwrite")
1272
1971
def ApprovedByDefault_dbus_property(self, value=None):
1273
1972
if value is None: # get
1274
1973
return dbus.Boolean(self.approved_by_default)
1275
1974
self.approved_by_default = bool(value)
1276
1975
1277
1976
# ApprovalDelay - property
1278
@dbus_service_property(_interface, signature="t",
1977
@dbus_service_property(_interface,
1978
signature="t",
1279
1979
access="readwrite")
1280
1980
def ApprovalDelay_dbus_property(self, value=None):
1281
1981
if value is None: # get
1282
return dbus.UInt64(self.approval_delay_milliseconds())
1982
return dbus.UInt64(self.approval_delay.total_seconds()
1983
* 1000)
1283
1984
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1284
1985
1285
1986
# ApprovalDuration - property
1286
@dbus_service_property(_interface, signature="t",
1987
@dbus_service_property(_interface,
1988
signature="t",
1287
1989
access="readwrite")
1288
1990
def ApprovalDuration_dbus_property(self, value=None):
1289
1991
if value is None: # get
1290
return dbus.UInt64(timedelta_to_milliseconds(
1291
self.approval_duration))
1992
return dbus.UInt64(self.approval_duration.total_seconds()
1993
* 1000)
1292
1994
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1293
1995
1294
1996
# Name - property
1997
@dbus_annotations(
1998
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1295
1999
@dbus_service_property(_interface, signature="s", access="read")
1296
2000
def Name_dbus_property(self):
1297
2001
return dbus.String(self.name)
1298
2002
1299
2003
# Fingerprint - property
2004
@dbus_annotations(
2005
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1300
2006
@dbus_service_property(_interface, signature="s", access="read")
1301
2007
def Fingerprint_dbus_property(self):
1302
2008
return dbus.String(self.fingerprint)
1303
2009
1304
2010
# Host - property
1305
@dbus_service_property(_interface, signature="s",
2011
@dbus_service_property(_interface,
2012
signature="s",
1306
2013
access="readwrite")
1307
2014
def Host_dbus_property(self, value=None):
1308
2015
if value is None: # get
1309
2016
return dbus.String(self.host)
1310
self.host = unicode(value)
1311
2017
self.host = str(value)
2018
1312
2019
# Created - property
2020
@dbus_annotations(
2021
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1313
2022
@dbus_service_property(_interface, signature="s", access="read")
1314
2023
def Created_dbus_property(self):
1315
2024
return datetime_to_dbus(self.created)
1316
2025
1317
2026
# LastEnabled - property
1318
2027
@dbus_service_property(_interface, signature="s", access="read")
1319
2028
def LastEnabled_dbus_property(self):
1320
2029
return datetime_to_dbus(self.last_enabled)
1321
2030
1322
2031
# Enabled - property
1323
@dbus_service_property(_interface, signature="b",
2032
@dbus_service_property(_interface,
2033
signature="b",
1324
2034
access="readwrite")
1325
2035
def Enabled_dbus_property(self, value=None):
1326
2036
if value is None: # get
1329
2039
self.enable()
1330
2040
else:
1331
2041
self.disable()
1332
2042
1333
2043
# LastCheckedOK - property
1334
@dbus_service_property(_interface, signature="s",
2044
@dbus_service_property(_interface,
2045
signature="s",
1335
2046
access="readwrite")
1336
2047
def LastCheckedOK_dbus_property(self, value=None):
1337
2048
if value is not None:
1338
2049
self.checked_ok()
1339
2050
return
1340
2051
return datetime_to_dbus(self.last_checked_ok)
1341
2052
2053
# LastCheckerStatus - property
2054
@dbus_service_property(_interface, signature="n", access="read")
2055
def LastCheckerStatus_dbus_property(self):
2056
return dbus.Int16(self.last_checker_status)
2057
1342
2058
# Expires - property
1343
2059
@dbus_service_property(_interface, signature="s", access="read")
1344
2060
def Expires_dbus_property(self):
1345
2061
return datetime_to_dbus(self.expires)
1346
2062
1347
2063
# LastApprovalRequest - property
1348
2064
@dbus_service_property(_interface, signature="s", access="read")
1349
2065
def LastApprovalRequest_dbus_property(self):
1350
2066
return datetime_to_dbus(self.last_approval_request)
1351
2067
1352
2068
# Timeout - property
1353
@dbus_service_property(_interface, signature="t",
2069
@dbus_service_property(_interface,
2070
signature="t",
1354
2071
access="readwrite")
1355
2072
def Timeout_dbus_property(self, value=None):
1356
2073
if value is None: # get
1357
return dbus.UInt64(self.timeout_milliseconds())
2074
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2075
old_timeout = self.timeout
1358
2076
self.timeout = datetime.timedelta(0, 0, 0, value)
1359
# Reschedule timeout
2077
# Reschedule disabling
1360
2078
if self.enabled:
1361
2079
now = datetime.datetime.utcnow()
1362
time_to_die = timedelta_to_milliseconds(
1363
(self.last_checked_ok + self.timeout) - now)
1364
if time_to_die <= 0:
2080
self.expires += self.timeout - old_timeout
2081
if self.expires <= now:
1365
2082
# The timeout has passed
1366
2083
self.disable()
1367
2084
else:
1368
self.expires = (now +
1369
datetime.timedelta(milliseconds =
1370
time_to_die))
1371
2085
if (getattr(self, "disable_initiator_tag", None)
1372
2086
is None):
1373
2087
return
1374
gobject.source_remove(self.disable_initiator_tag)
1375
self.disable_initiator_tag = (gobject.timeout_add
1376
(time_to_die,
1377
self.disable))
1378
2088
GLib.source_remove(self.disable_initiator_tag)
2089
self.disable_initiator_tag = GLib.timeout_add(
2090
int((self.expires - now).total_seconds() * 1000),
2091
self.disable)
2092
1379
2093
# ExtendedTimeout - property
1380
@dbus_service_property(_interface, signature="t",
2094
@dbus_service_property(_interface,
2095
signature="t",
1381
2096
access="readwrite")
1382
2097
def ExtendedTimeout_dbus_property(self, value=None):
1383
2098
if value is None: # get
1384
return dbus.UInt64(self.extended_timeout_milliseconds())
2099
return dbus.UInt64(self.extended_timeout.total_seconds()
2100
* 1000)
1385
2101
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1386
2102
1387
2103
# Interval - property
1388
@dbus_service_property(_interface, signature="t",
2104
@dbus_service_property(_interface,
2105
signature="t",
1389
2106
access="readwrite")
1390
2107
def Interval_dbus_property(self, value=None):
1391
2108
if value is None: # get
1392
return dbus.UInt64(self.interval_milliseconds())
2109
return dbus.UInt64(self.interval.total_seconds() * 1000)
1393
2110
self.interval = datetime.timedelta(0, 0, 0, value)
1394
2111
if getattr(self, "checker_initiator_tag", None) is None:
1395
2112
return
1396
2113
if self.enabled:
1397
2114
# Reschedule checker run
1398
gobject.source_remove(self.checker_initiator_tag)
1399
self.checker_initiator_tag = (gobject.timeout_add
1400
(value, self.start_checker))
1401
self.start_checker() # Start one now, too
1402
2115
GLib.source_remove(self.checker_initiator_tag)
2116
self.checker_initiator_tag = GLib.timeout_add(
2117
value, self.start_checker)
2118
self.start_checker() # Start one now, too
2119
1403
2120
# Checker - property
1404
@dbus_service_property(_interface, signature="s",
2121
@dbus_service_property(_interface,
2122
signature="s",
1405
2123
access="readwrite")
1406
2124
def Checker_dbus_property(self, value=None):
1407
2125
if value is None: # get
1408
2126
return dbus.String(self.checker_command)
1409
self.checker_command = unicode(value)
1410
2127
self.checker_command = str(value)
2128
1411
2129
# CheckerRunning - property
1412
@dbus_service_property(_interface, signature="b",
2130
@dbus_service_property(_interface,
2131
signature="b",
1413
2132
access="readwrite")
1414
2133
def CheckerRunning_dbus_property(self, value=None):
1415
2134
if value is None: # get
1418
2137
self.start_checker()
1419
2138
else:
1420
2139
self.stop_checker()
1421
2140
1422
2141
# ObjectPath - property
2142
@dbus_annotations(
2143
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2144
"org.freedesktop.DBus.Deprecated": "true"})
1423
2145
@dbus_service_property(_interface, signature="o", access="read")
1424
2146
def ObjectPath_dbus_property(self):
1425
return self.dbus_object_path # is already a dbus.ObjectPath
1426
2147
return self.dbus_object_path # is already a dbus.ObjectPath
2148
1427
2149
# Secret = property
1428
@dbus_service_property(_interface, signature="ay",
1429
access="write", byte_arrays=True)
2150
@dbus_annotations(
2151
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2152
"invalidates"})
2153
@dbus_service_property(_interface,
2154
signature="ay",
2155
access="write",
2156
byte_arrays=True)
1430
2157
def Secret_dbus_property(self, value):
1431
self.secret = str(value)
1432
2158
self.secret = bytes(value)
2159
1433
2160
del _interface
1434
2161
1435
2162
1438
2165
self._pipe = child_pipe
1439
2166
self._pipe.send(('init', fpr, address))
1440
2167
if not self._pipe.recv():
1441
raise KeyError()
1442
2168
raise KeyError(fpr)
2169
1443
2170
def __getattribute__(self, name):
1444
2171
if name == '_pipe':
1445
2172
return super(ProxyClient, self).__getattribute__(name)
1448
2175
if data[0] == 'data':
1449
2176
return data[1]
1450
2177
if data[0] == 'function':
2178
1451
2179
def func(*args, **kwargs):
1452
2180
self._pipe.send(('funcall', name, args, kwargs))
1453
2181
return self._pipe.recv()[1]
2182
1454
2183
return func
1455
2184
1456
2185
def __setattr__(self, name, value):
1457
2186
if name == '_pipe':
1458
2187
return super(ProxyClient, self).__setattr__(name, value)
1459
2188
self._pipe.send(('setattr', name, value))
1460
2189
1461
2190
1462
class ClientDBusTransitional(ClientDBus):
1463
__metaclass__ = AlternateDBusNamesMetaclass
1464
1465
1466
2191
class ClientHandler(socketserver.BaseRequestHandler, object):
1467
2192
"""A class to handle client connections.
1468
2193
1469
2194
Instantiated once for each connection to handle it.
1470
2195
Note: This will run in its own forked process."""
1471
2196
1472
2197
def handle(self):
1473
2198
with contextlib.closing(self.server.child_pipe) as child_pipe:
1474
2199
logger.info("TCP connection from: %s",
1475
unicode(self.client_address))
2200
str(self.client_address))
1476
2201
logger.debug("Pipe FD: %d",
1477
2202
self.server.child_pipe.fileno())
1478
1479
session = (gnutls.connection
1480
.ClientSession(self.request,
1481
gnutls.connection
1482
.X509Credentials()))
1483
1484
# Note: gnutls.connection.X509Credentials is really a
1485
# generic GnuTLS certificate credentials object so long as
1486
# no X.509 keys are added to it. Therefore, we can use it
1487
# here despite using OpenPGP certificates.
1488
1489
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1490
# "+AES-256-CBC", "+SHA1",
1491
# "+COMP-NULL", "+CTYPE-OPENPGP",
1492
# "+DHE-DSS"))
2203
2204
session = gnutls.ClientSession(self.request)
2205
2206
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2207
# "+AES-256-CBC", "+SHA1",
2208
# "+COMP-NULL", "+CTYPE-OPENPGP",
2209
# "+DHE-DSS"))
1493
2210
# Use a fallback default, since this MUST be set.
1494
2211
priority = self.server.gnutls_priority
1495
2212
if priority is None:
1496
2213
priority = "NORMAL"
1497
(gnutls.library.functions
1498
.gnutls_priority_set_direct(session._c_object,
1499
priority, None))
1500
2214
gnutls.priority_set_direct(session._c_object,
2215
priority.encode("utf-8"),
2216
None)
2217
1501
2218
# Start communication using the Mandos protocol
1502
2219
# Get protocol number
1503
2220
line = self.request.makefile().readline()
1504
2221
logger.debug("Protocol version: %r", line)
1505
2222
try:
1506
2223
if int(line.strip().split()[0]) > 1:
1507
raise RuntimeError
2224
raise RuntimeError(line)
1508
2225
except (ValueError, IndexError, RuntimeError) as error:
1509
2226
logger.error("Unknown protocol version: %s", error)
1510
2227
return
1511
2228
1512
2229
# Start GnuTLS connection
1513
2230
try:
1514
2231
session.handshake()
1515
except gnutls.errors.GNUTLSError as error:
2232
except gnutls.Error as error:
1516
2233
logger.warning("Handshake failed: %s", error)
1517
2234
# Do not run session.bye() here: the session is not
1518
2235
# established. Just abandon the request.
1519
2236
return
1520
2237
logger.debug("Handshake succeeded")
1521
2238
1522
2239
approval_required = False
1523
2240
try:
1524
2241
try:
1525
fpr = self.fingerprint(self.peer_certificate
1526
(session))
1527
except (TypeError,
1528
gnutls.errors.GNUTLSError) as error:
2242
fpr = self.fingerprint(
2243
self.peer_certificate(session))
2244
except (TypeError, gnutls.Error) as error:
1529
2245
logger.warning("Bad certificate: %s", error)
1530
2246
return
1531
2247
logger.debug("Fingerprint: %s", fpr)
1532
2248
1533
2249
try:
1534
2250
client = ProxyClient(child_pipe, fpr,
1535
2251
self.client_address)
1536
2252
except KeyError:
1537
2253
return
1538
2254
1539
2255
if client.approval_delay:
1540
2256
delay = client.approval_delay
1541
2257
client.approvals_pending += 1
1542
2258
approval_required = True
1543
2259
1544
2260
while True:
1545
2261
if not client.enabled:
1546
2262
logger.info("Client %s is disabled",
1547
client.name)
2263
client.name)
1548
2264
if self.server.use_dbus:
1549
2265
# Emit D-Bus signal
1550
2266
client.Rejected("Disabled")
1551
2267
return
1552
2268
1553
2269
if client.approved or not client.approval_delay:
1554
#We are approved or approval is disabled
2270
# We are approved or approval is disabled
1555
2271
break
1556
2272
elif client.approved is None:
1557
2273
logger.info("Client %s needs approval",
1559
2275
if self.server.use_dbus:
1560
2276
# Emit D-Bus signal
1561
2277
client.NeedApproval(
1562
client.approval_delay_milliseconds(),
1563
client.approved_by_default)
2278
client.approval_delay.total_seconds()
2279
* 1000, client.approved_by_default)
1564
2280
else:
1565
2281
logger.warning("Client %s was not approved",
1566
2282
client.name)
1568
2284
# Emit D-Bus signal
1569
2285
client.Rejected("Denied")
1570
2286
return
1571
1572
#wait until timeout or approved
2287
2288
# wait until timeout or approved
1573
2289
time = datetime.datetime.now()
1574
2290
client.changedstate.acquire()
1575
(client.changedstate.wait
1576
(float(client.timedelta_to_milliseconds(delay)
1577
/ 1000)))
2291
client.changedstate.wait(delay.total_seconds())
1578
2292
client.changedstate.release()
1579
2293
time2 = datetime.datetime.now()
1580
2294
if (time2 - time) >= delay:
1590
2304
break
1591
2305
else:
1592
2306
delay -= time2 - time
1593
1594
sent_size = 0
1595
while sent_size < len(client.secret):
1596
try:
1597
sent = session.send(client.secret[sent_size:])
1598
except gnutls.errors.GNUTLSError as error:
1599
logger.warning("gnutls send failed")
1600
return
1601
logger.debug("Sent: %d, remaining: %d",
1602
sent, len(client.secret)
1603
- (sent_size + sent))
1604
sent_size += sent
1605
2307
2308
try:
2309
session.send(client.secret)
2310
except gnutls.Error as error:
2311
logger.warning("gnutls send failed",
2312
exc_info=error)
2313
return
2314
1606
2315
logger.info("Sending secret to %s", client.name)
1607
2316
# bump the timeout using extended_timeout
1608
client.checked_ok(client.extended_timeout)
2317
client.bump_timeout(client.extended_timeout)
1609
2318
if self.server.use_dbus:
1610
2319
# Emit D-Bus signal
1611
2320
client.GotSecret()
1612
2321
1613
2322
finally:
1614
2323
if approval_required:
1615
2324
client.approvals_pending -= 1
1616
2325
try:
1617
2326
session.bye()
1618
except gnutls.errors.GNUTLSError as error:
1619
logger.warning("GnuTLS bye failed")
1620
2327
except gnutls.Error as error:
2328
logger.warning("GnuTLS bye failed",
2329
exc_info=error)
2330
1621
2331
@staticmethod
1622
2332
def peer_certificate(session):
1623
2333
"Return the peer's OpenPGP certificate as a bytestring"
1624
2334
# If not an OpenPGP certificate...
1625
if (gnutls.library.functions
1626
.gnutls_certificate_type_get(session._c_object)
1627
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1628
# ...do the normal thing
1629
return session.peer_certificate
2335
if (gnutls.certificate_type_get(session._c_object)
2336
!= gnutls.CRT_OPENPGP):
2337
# ...return invalid data
2338
return b""
1630
2339
list_size = ctypes.c_uint(1)
1631
cert_list = (gnutls.library.functions
1632
.gnutls_certificate_get_peers
2340
cert_list = (gnutls.certificate_get_peers
1633
2341
(session._c_object, ctypes.byref(list_size)))
1634
2342
if not bool(cert_list) and list_size.value != 0:
1635
raise gnutls.errors.GNUTLSError("error getting peer"
1636
" certificate")
2343
raise gnutls.Error("error getting peer certificate")
1637
2344
if list_size.value == 0:
1638
2345
return None
1639
2346
cert = cert_list[0]
1640
2347
return ctypes.string_at(cert.data, cert.size)
1641
2348
1642
2349
@staticmethod
1643
2350
def fingerprint(openpgp):
1644
2351
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1645
2352
# New GnuTLS "datum" with the OpenPGP public key
1646
datum = (gnutls.library.types
1647
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1648
ctypes.POINTER
1649
(ctypes.c_ubyte)),
1650
ctypes.c_uint(len(openpgp))))
2353
datum = gnutls.datum_t(
2354
ctypes.cast(ctypes.c_char_p(openpgp),
2355
ctypes.POINTER(ctypes.c_ubyte)),
2356
ctypes.c_uint(len(openpgp)))
1651
2357
# New empty GnuTLS certificate
1652
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1653
(gnutls.library.functions
1654
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2358
crt = gnutls.openpgp_crt_t()
2359
gnutls.openpgp_crt_init(ctypes.byref(crt))
1655
2360
# Import the OpenPGP public key into the certificate
1656
(gnutls.library.functions
1657
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1658
gnutls.library.constants
1659
.GNUTLS_OPENPGP_FMT_RAW))
2361
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2362
gnutls.OPENPGP_FMT_RAW)
1660
2363
# Verify the self signature in the key
1661
2364
crtverify = ctypes.c_uint()
1662
(gnutls.library.functions
1663
.gnutls_openpgp_crt_verify_self(crt, 0,
1664
ctypes.byref(crtverify)))
2365
gnutls.openpgp_crt_verify_self(crt, 0,
2366
ctypes.byref(crtverify))
1665
2367
if crtverify.value != 0:
1666
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1667
raise (gnutls.errors.CertificateSecurityError
1668
("Verify failed"))
2368
gnutls.openpgp_crt_deinit(crt)
2369
raise gnutls.CertificateSecurityError("Verify failed")
1669
2370
# New buffer for the fingerprint
1670
2371
buf = ctypes.create_string_buffer(20)
1671
2372
buf_len = ctypes.c_size_t()
1672
2373
# Get the fingerprint from the certificate into the buffer
1673
(gnutls.library.functions
1674
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1675
ctypes.byref(buf_len)))
2374
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2375
ctypes.byref(buf_len))
1676
2376
# Deinit the certificate
1677
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2377
gnutls.openpgp_crt_deinit(crt)
1678
2378
# Convert the buffer to a Python bytestring
1679
2379
fpr = ctypes.string_at(buf, buf_len.value)
1680
2380
# Convert the bytestring to hexadecimal notation
1684
2384
1685
2385
class MultiprocessingMixIn(object):
1686
2386
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2387
1687
2388
def sub_process_main(self, request, address):
1688
2389
try:
1689
2390
self.finish_request(request, address)
1690
2391
except Exception:
1691
2392
self.handle_error(request, address)
1692
2393
self.close_request(request)
1693
2394
1694
2395
def process_request(self, request, address):
1695
2396
"""Start a new process to process the request."""
1696
proc = multiprocessing.Process(target = self.sub_process_main,
1697
args = (request,
1698
address))
2397
proc = multiprocessing.Process(target=self.sub_process_main,
2398
args=(request, address))
1699
2399
proc.start()
1700
2400
return proc
1701
2401
1702
2402
1703
2403
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1704
2404
""" adds a pipe to the MixIn """
2405
1705
2406
def process_request(self, request, client_address):
1706
2407
"""Overrides and wraps the original process_request().
1707
2408
1708
2409
This function creates a new pipe in self.pipe
1709
2410
"""
1710
2411
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1711
2412
1712
2413
proc = MultiprocessingMixIn.process_request(self, request,
1713
2414
client_address)
1714
2415
self.child_pipe.close()
1715
2416
self.add_pipe(parent_pipe, proc)
1716
2417
1717
2418
def add_pipe(self, parent_pipe, proc):
1718
2419
"""Dummy function; override as necessary"""
1719
raise NotImplementedError
2420
raise NotImplementedError()
1720
2421
1721
2422
1722
2423
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1723
2424
socketserver.TCPServer, object):
1724
2425
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1725
2426
1726
2427
Attributes:
1727
2428
enabled: Boolean; whether this server is activated yet
1728
2429
interface: None or a network interface name (string)
1729
2430
use_ipv6: Boolean; to use IPv6 or not
1730
2431
"""
2432
1731
2433
def __init__(self, server_address, RequestHandlerClass,
1732
interface=None, use_ipv6=True):
2434
interface=None,
2435
use_ipv6=True,
2436
socketfd=None):
2437
"""If socketfd is set, use that file descriptor instead of
2438
creating a new one with socket.socket().
2439
"""
1733
2440
self.interface = interface
1734
2441
if use_ipv6:
1735
2442
self.address_family = socket.AF_INET6
2443
if socketfd is not None:
2444
# Save the file descriptor
2445
self.socketfd = socketfd
2446
# Save the original socket.socket() function
2447
self.socket_socket = socket.socket
2448
2449
# To implement --socket, we monkey patch socket.socket.
2450
#
2451
# (When socketserver.TCPServer is a new-style class, we
2452
# could make self.socket into a property instead of monkey
2453
# patching socket.socket.)
2454
#
2455
# Create a one-time-only replacement for socket.socket()
2456
@functools.wraps(socket.socket)
2457
def socket_wrapper(*args, **kwargs):
2458
# Restore original function so subsequent calls are
2459
# not affected.
2460
socket.socket = self.socket_socket
2461
del self.socket_socket
2462
# This time only, return a new socket object from the
2463
# saved file descriptor.
2464
return socket.fromfd(self.socketfd, *args, **kwargs)
2465
# Replace socket.socket() function with wrapper
2466
socket.socket = socket_wrapper
2467
# The socketserver.TCPServer.__init__ will call
2468
# socket.socket(), which might be our replacement,
2469
# socket_wrapper(), if socketfd was set.
1736
2470
socketserver.TCPServer.__init__(self, server_address,
1737
2471
RequestHandlerClass)
2472
1738
2473
def server_bind(self):
1739
2474
"""This overrides the normal server_bind() function
1740
2475
to bind to an interface if one was specified, and also NOT to
1741
2476
bind to an address or port if they were not specified."""
2477
global SO_BINDTODEVICE
1742
2478
if self.interface is not None:
1743
2479
if SO_BINDTODEVICE is None:
1744
logger.error("SO_BINDTODEVICE does not exist;"
1745
" cannot bind to interface %s",
1746
self.interface)
1747
else:
1748
try:
1749
self.socket.setsockopt(socket.SOL_SOCKET,
1750
SO_BINDTODEVICE,
1751
str(self.interface
1752
+ '\0'))
1753
except socket.error as error:
1754
if error[0] == errno.EPERM:
1755
logger.error("No permission to"
1756
" bind to interface %s",
1757
self.interface)
1758
elif error[0] == errno.ENOPROTOOPT:
1759
logger.error("SO_BINDTODEVICE not available;"
1760
" cannot bind to interface %s",
1761
self.interface)
1762
else:
1763
raise
2480
# Fall back to a hard-coded value which seems to be
2481
# common enough.
2482
logger.warning("SO_BINDTODEVICE not found, trying 25")
2483
SO_BINDTODEVICE = 25
2484
try:
2485
self.socket.setsockopt(
2486
socket.SOL_SOCKET, SO_BINDTODEVICE,
2487
(self.interface + "\0").encode("utf-8"))
2488
except socket.error as error:
2489
if error.errno == errno.EPERM:
2490
logger.error("No permission to bind to"
2491
" interface %s", self.interface)
2492
elif error.errno == errno.ENOPROTOOPT:
2493
logger.error("SO_BINDTODEVICE not available;"
2494
" cannot bind to interface %s",
2495
self.interface)
2496
elif error.errno == errno.ENODEV:
2497
logger.error("Interface %s does not exist,"
2498
" cannot bind", self.interface)
2499
else:
2500
raise
1764
2501
# Only bind(2) the socket if we really need to.
1765
2502
if self.server_address[0] or self.server_address[1]:
1766
2503
if not self.server_address[0]:
1767
2504
if self.address_family == socket.AF_INET6:
1768
any_address = "::" # in6addr_any
2505
any_address = "::" # in6addr_any
1769
2506
else:
1770
any_address = socket.INADDR_ANY
2507
any_address = "0.0.0.0" # INADDR_ANY
1771
2508
self.server_address = (any_address,
1772
2509
self.server_address[1])
1773
2510
elif not self.server_address[1]:
1774
self.server_address = (self.server_address[0],
1775
0)
2511
self.server_address = (self.server_address[0], 0)
1776
2512
# if self.interface:
1777
2513
# self.server_address = (self.server_address[0],
1778
2514
# 0, # port
1784
2520
1785
2521
class MandosServer(IPv6_TCPServer):
1786
2522
"""Mandos server.
1787
2523
1788
2524
Attributes:
1789
2525
clients: set of Client objects
1790
2526
gnutls_priority GnuTLS priority string
1791
2527
use_dbus: Boolean; to emit D-Bus signals or not
1792
1793
Assumes a gobject.MainLoop event loop.
2528
2529
Assumes a GLib.MainLoop event loop.
1794
2530
"""
2531
1795
2532
def __init__(self, server_address, RequestHandlerClass,
1796
interface=None, use_ipv6=True, clients=None,
1797
gnutls_priority=None, use_dbus=True):
2533
interface=None,
2534
use_ipv6=True,
2535
clients=None,
2536
gnutls_priority=None,
2537
use_dbus=True,
2538
socketfd=None):
1798
2539
self.enabled = False
1799
2540
self.clients = clients
1800
2541
if self.clients is None:
1803
2544
self.gnutls_priority = gnutls_priority
1804
2545
IPv6_TCPServer.__init__(self, server_address,
1805
2546
RequestHandlerClass,
1806
interface = interface,
1807
use_ipv6 = use_ipv6)
2547
interface=interface,
2548
use_ipv6=use_ipv6,
2549
socketfd=socketfd)
2550
1808
2551
def server_activate(self):
1809
2552
if self.enabled:
1810
2553
return socketserver.TCPServer.server_activate(self)
1811
2554
1812
2555
def enable(self):
1813
2556
self.enabled = True
1814
2557
1815
2558
def add_pipe(self, parent_pipe, proc):
1816
2559
# Call "handle_ipc" for both data and EOF events
1817
gobject.io_add_watch(parent_pipe.fileno(),
1818
gobject.IO_IN | gobject.IO_HUP,
1819
functools.partial(self.handle_ipc,
1820
parent_pipe =
1821
parent_pipe,
1822
proc = proc))
1823
1824
def handle_ipc(self, source, condition, parent_pipe=None,
1825
proc = None, client_object=None):
1826
condition_names = {
1827
gobject.IO_IN: "IN", # There is data to read.
1828
gobject.IO_OUT: "OUT", # Data can be written (without
1829
# blocking).
1830
gobject.IO_PRI: "PRI", # There is urgent data to read.
1831
gobject.IO_ERR: "ERR", # Error condition.
1832
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1833
# broken, usually for pipes and
1834
# sockets).
1835
}
1836
conditions_string = ' | '.join(name
1837
for cond, name in
1838
condition_names.iteritems()
1839
if cond & condition)
2560
GLib.io_add_watch(
2561
parent_pipe.fileno(),
2562
GLib.IO_IN | GLib.IO_HUP,
2563
functools.partial(self.handle_ipc,
2564
parent_pipe=parent_pipe,
2565
proc=proc))
2566
2567
def handle_ipc(self, source, condition,
2568
parent_pipe=None,
2569
proc=None,
2570
client_object=None):
1840
2571
# error, or the other end of multiprocessing.Pipe has closed
1841
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2572
if condition & (GLib.IO_ERR | GLib.IO_HUP):
1842
2573
# Wait for other process to exit
1843
2574
proc.join()
1844
2575
return False
1845
2576
1846
2577
# Read a request from the child
1847
2578
request = parent_pipe.recv()
1848
2579
command = request[0]
1849
2580
1850
2581
if command == 'init':
1851
fpr = request[1]
2582
fpr = request[1].decode("ascii")
1852
2583
address = request[2]
1853
1854
for c in self.clients.itervalues():
2584
2585
for c in self.clients.values():
1855
2586
if c.fingerprint == fpr:
1856
2587
client = c
1857
2588
break
1864
2595
address[0])
1865
2596
parent_pipe.send(False)
1866
2597
return False
1867
1868
gobject.io_add_watch(parent_pipe.fileno(),
1869
gobject.IO_IN | gobject.IO_HUP,
1870
functools.partial(self.handle_ipc,
1871
parent_pipe =
1872
parent_pipe,
1873
proc = proc,
1874
client_object =
1875
client))
2598
2599
GLib.io_add_watch(
2600
parent_pipe.fileno(),
2601
GLib.IO_IN | GLib.IO_HUP,
2602
functools.partial(self.handle_ipc,
2603
parent_pipe=parent_pipe,
2604
proc=proc,
2605
client_object=client))
1876
2606
parent_pipe.send(True)
1877
2607
# remove the old hook in favor of the new above hook on
1878
2608
# same fileno
1881
2611
funcname = request[1]
1882
2612
args = request[2]
1883
2613
kwargs = request[3]
1884
2614
1885
2615
parent_pipe.send(('data', getattr(client_object,
1886
2616
funcname)(*args,
1887
**kwargs)))
1888
2617
**kwargs)))
2618
1889
2619
if command == 'getattr':
1890
2620
attrname = request[1]
1891
if callable(client_object.__getattribute__(attrname)):
1892
parent_pipe.send(('function',))
2621
if isinstance(client_object.__getattribute__(attrname),
2622
collections.Callable):
2623
parent_pipe.send(('function', ))
1893
2624
else:
1894
parent_pipe.send(('data', client_object
1895
.__getattribute__(attrname)))
1896
2625
parent_pipe.send((
2626
'data', client_object.__getattribute__(attrname)))
2627
1897
2628
if command == 'setattr':
1898
2629
attrname = request[1]
1899
2630
value = request[2]
1900
2631
setattr(client_object, attrname, value)
1901
2632
1902
2633
return True
1903
2634
1904
2635
2636
def rfc3339_duration_to_delta(duration):
2637
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2638
2639
>>> rfc3339_duration_to_delta("P7D")
2640
datetime.timedelta(7)
2641
>>> rfc3339_duration_to_delta("PT60S")
2642
datetime.timedelta(0, 60)
2643
>>> rfc3339_duration_to_delta("PT60M")
2644
datetime.timedelta(0, 3600)
2645
>>> rfc3339_duration_to_delta("PT24H")
2646
datetime.timedelta(1)
2647
>>> rfc3339_duration_to_delta("P1W")
2648
datetime.timedelta(7)
2649
>>> rfc3339_duration_to_delta("PT5M30S")
2650
datetime.timedelta(0, 330)
2651
>>> rfc3339_duration_to_delta("P1DT3M20S")
2652
datetime.timedelta(1, 200)
2653
"""
2654
2655
# Parsing an RFC 3339 duration with regular expressions is not
2656
# possible - there would have to be multiple places for the same
2657
# values, like seconds. The current code, while more esoteric, is
2658
# cleaner without depending on a parsing library. If Python had a
2659
# built-in library for parsing we would use it, but we'd like to
2660
# avoid excessive use of external libraries.
2661
2662
# New type for defining tokens, syntax, and semantics all-in-one
2663
Token = collections.namedtuple("Token", (
2664
"regexp", # To match token; if "value" is not None, must have
2665
# a "group" containing digits
2666
"value", # datetime.timedelta or None
2667
"followers")) # Tokens valid after this token
2668
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2669
# the "duration" ABNF definition in RFC 3339, Appendix A.
2670
token_end = Token(re.compile(r"$"), None, frozenset())
2671
token_second = Token(re.compile(r"(\d+)S"),
2672
datetime.timedelta(seconds=1),
2673
frozenset((token_end, )))
2674
token_minute = Token(re.compile(r"(\d+)M"),
2675
datetime.timedelta(minutes=1),
2676
frozenset((token_second, token_end)))
2677
token_hour = Token(re.compile(r"(\d+)H"),
2678
datetime.timedelta(hours=1),
2679
frozenset((token_minute, token_end)))
2680
token_time = Token(re.compile(r"T"),
2681
None,
2682
frozenset((token_hour, token_minute,
2683
token_second)))
2684
token_day = Token(re.compile(r"(\d+)D"),
2685
datetime.timedelta(days=1),
2686
frozenset((token_time, token_end)))
2687
token_month = Token(re.compile(r"(\d+)M"),
2688
datetime.timedelta(weeks=4),
2689
frozenset((token_day, token_end)))
2690
token_year = Token(re.compile(r"(\d+)Y"),
2691
datetime.timedelta(weeks=52),
2692
frozenset((token_month, token_end)))
2693
token_week = Token(re.compile(r"(\d+)W"),
2694
datetime.timedelta(weeks=1),
2695
frozenset((token_end, )))
2696
token_duration = Token(re.compile(r"P"), None,
2697
frozenset((token_year, token_month,
2698
token_day, token_time,
2699
token_week)))
2700
# Define starting values:
2701
# Value so far
2702
value = datetime.timedelta()
2703
found_token = None
2704
# Following valid tokens
2705
followers = frozenset((token_duration, ))
2706
# String left to parse
2707
s = duration
2708
# Loop until end token is found
2709
while found_token is not token_end:
2710
# Search for any currently valid tokens
2711
for token in followers:
2712
match = token.regexp.match(s)
2713
if match is not None:
2714
# Token found
2715
if token.value is not None:
2716
# Value found, parse digits
2717
factor = int(match.group(1), 10)
2718
# Add to value so far
2719
value += factor * token.value
2720
# Strip token from string
2721
s = token.regexp.sub("", s, 1)
2722
# Go to found token
2723
found_token = token
2724
# Set valid next tokens
2725
followers = found_token.followers
2726
break
2727
else:
2728
# No currently valid tokens were found
2729
raise ValueError("Invalid RFC 3339 duration: {!r}"
2730
.format(duration))
2731
# End token found
2732
return value
2733
2734
1905
2735
def string_to_delta(interval):
1906
2736
"""Parse a string and return a datetime.timedelta
1907
2737
1908
2738
>>> string_to_delta('7d')
1909
2739
datetime.timedelta(7)
1910
2740
>>> string_to_delta('60s')
1918
2748
>>> string_to_delta('5m 30s')
1919
2749
datetime.timedelta(0, 330)
1920
2750
"""
2751
2752
try:
2753
return rfc3339_duration_to_delta(interval)
2754
except ValueError:
2755
pass
2756
1921
2757
timevalue = datetime.timedelta(0)
1922
2758
for s in interval.split():
1923
2759
try:
1924
suffix = unicode(s[-1])
2760
suffix = s[-1]
1925
2761
value = int(s[:-1])
1926
2762
if suffix == "d":
1927
2763
delta = datetime.timedelta(value)
1934
2770
elif suffix == "w":
1935
2771
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1936
2772
else:
1937
raise ValueError("Unknown suffix %r" % suffix)
1938
except (ValueError, IndexError) as e:
2773
raise ValueError("Unknown suffix {!r}".format(suffix))
2774
except IndexError as e:
1939
2775
raise ValueError(*(e.args))
1940
2776
timevalue += delta
1941
2777
return timevalue
1942
2778
1943
2779
1944
def daemon(nochdir = False, noclose = False):
2780
def daemon(nochdir=False, noclose=False):
1945
2781
"""See daemon(3). Standard BSD Unix function.
1946
2782
1947
2783
This should really exist as os.daemon, but it doesn't (yet)."""
1948
2784
if os.fork():
1949
2785
sys.exit()
1954
2790
sys.exit()
1955
2791
if not noclose:
1956
2792
# Close all standard open file descriptors
1957
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2793
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1958
2794
if not stat.S_ISCHR(os.fstat(null).st_mode):
1959
2795
raise OSError(errno.ENODEV,
1960
"%s not a character device"
1961
% os.path.devnull)
2796
"{} not a character device"
2797
.format(os.devnull))
1962
2798
os.dup2(null, sys.stdin.fileno())
1963
2799
os.dup2(null, sys.stdout.fileno())
1964
2800
os.dup2(null, sys.stderr.fileno())
1967
2803
1968
2804
1969
2805
def main():
1970
2806
1971
2807
##################################################################
1972
2808
# Parsing of options, both command line and config file
1973
2809
1974
2810
parser = argparse.ArgumentParser()
1975
2811
parser.add_argument("-v", "--version", action="version",
1976
version = "%%(prog)s %s" % version,
2812
version="%(prog)s {}".format(version),
1977
2813
help="show version number and exit")
1978
2814
parser.add_argument("-i", "--interface", metavar="IF",
1979
2815
help="Bind to interface IF")
1985
2821
help="Run self-test")
1986
2822
parser.add_argument("--debug", action="store_true",
1987
2823
help="Debug mode; run in foreground and log"
1988
" to terminal")
2824
" to terminal", default=None)
1989
2825
parser.add_argument("--debuglevel", metavar="LEVEL",
1990
2826
help="Debug level for stdout output")
1991
2827
parser.add_argument("--priority", help="GnuTLS"
1998
2834
" files")
1999
2835
parser.add_argument("--no-dbus", action="store_false",
2000
2836
dest="use_dbus", help="Do not provide D-Bus"
2001
" system bus interface")
2837
" system bus interface", default=None)
2002
2838
parser.add_argument("--no-ipv6", action="store_false",
2003
dest="use_ipv6", help="Do not use IPv6")
2839
dest="use_ipv6", help="Do not use IPv6",
2840
default=None)
2004
2841
parser.add_argument("--no-restore", action="store_false",
2005
2842
dest="restore", help="Do not restore stored"
2006
" state")
2843
" state", default=None)
2844
parser.add_argument("--socket", type=int,
2845
help="Specify a file descriptor to a network"
2846
" socket to use instead of creating one")
2007
2847
parser.add_argument("--statedir", metavar="DIR",
2008
2848
help="Directory to save/restore state in")
2009
2849
parser.add_argument("--foreground", action="store_true",
2850
help="Run in foreground", default=None)
2851
parser.add_argument("--no-zeroconf", action="store_false",
2852
dest="zeroconf", help="Do not use Zeroconf",
2853
default=None)
2854
2010
2855
options = parser.parse_args()
2011
2856
2012
2857
if options.check:
2013
2858
import doctest
2014
doctest.testmod()
2015
sys.exit()
2016
2859
fail_count, test_count = doctest.testmod()
2860
sys.exit(os.EX_OK if fail_count == 0 else 1)
2861
2017
2862
# Default values for config file for server-global settings
2018
server_defaults = { "interface": "",
2019
"address": "",
2020
"port": "",
2021
"debug": "False",
2022
"priority":
2023
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2024
"servicename": "Mandos",
2025
"use_dbus": "True",
2026
"use_ipv6": "True",
2027
"debuglevel": "",
2028
"restore": "True",
2029
"statedir": "/var/lib/mandos"
2030
}
2031
2863
server_defaults = {"interface": "",
2864
"address": "",
2865
"port": "",
2866
"debug": "False",
2867
"priority":
2868
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2869
":+SIGN-DSA-SHA256",
2870
"servicename": "Mandos",
2871
"use_dbus": "True",
2872
"use_ipv6": "True",
2873
"debuglevel": "",
2874
"restore": "True",
2875
"socket": "",
2876
"statedir": "/var/lib/mandos",
2877
"foreground": "False",
2878
"zeroconf": "True",
2879
}
2880
2032
2881
# Parse config file for server-global settings
2033
2882
server_config = configparser.SafeConfigParser(server_defaults)
2034
2883
del server_defaults
2035
server_config.read(os.path.join(options.configdir,
2036
"mandos.conf"))
2884
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2037
2885
# Convert the SafeConfigParser object to a dict
2038
2886
server_settings = server_config.defaults()
2039
2887
# Use the appropriate methods on the non-string config options
2040
for option in ("debug", "use_dbus", "use_ipv6"):
2888
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2889
"foreground", "zeroconf"):
2041
2890
server_settings[option] = server_config.getboolean("DEFAULT",
2042
2891
option)
2043
2892
if server_settings["port"]:
2044
2893
server_settings["port"] = server_config.getint("DEFAULT",
2045
2894
"port")
2895
if server_settings["socket"]:
2896
server_settings["socket"] = server_config.getint("DEFAULT",
2897
"socket")
2898
# Later, stdin will, and stdout and stderr might, be dup'ed
2899
# over with an opened os.devnull. But we don't want this to
2900
# happen with a supplied network socket.
2901
if 0 <= server_settings["socket"] <= 2:
2902
server_settings["socket"] = os.dup(server_settings
2903
["socket"])
2046
2904
del server_config
2047
2905
2048
2906
# Override the settings from the config file with command line
2049
2907
# options, if set.
2050
2908
for option in ("interface", "address", "port", "debug",
2051
"priority", "servicename", "configdir",
2052
"use_dbus", "use_ipv6", "debuglevel", "restore",
2053
"statedir"):
2909
"priority", "servicename", "configdir", "use_dbus",
2910
"use_ipv6", "debuglevel", "restore", "statedir",
2911
"socket", "foreground", "zeroconf"):
2054
2912
value = getattr(options, option)
2055
2913
if value is not None:
2056
2914
server_settings[option] = value
2057
2915
del options
2058
2916
# Force all strings to be unicode
2059
2917
for option in server_settings.keys():
2060
if type(server_settings[option]) is str:
2061
server_settings[option] = unicode(server_settings[option])
2918
if isinstance(server_settings[option], bytes):
2919
server_settings[option] = (server_settings[option]
2920
.decode("utf-8"))
2921
# Force all boolean options to be boolean
2922
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2923
"foreground", "zeroconf"):
2924
server_settings[option] = bool(server_settings[option])
2925
# Debug implies foreground
2926
if server_settings["debug"]:
2927
server_settings["foreground"] = True
2062
2928
# Now we have our good server settings in "server_settings"
2063
2929
2064
2930
##################################################################
2065
2931
2932
if (not server_settings["zeroconf"]
2933
and not (server_settings["port"]
2934
or server_settings["socket"] != "")):
2935
parser.error("Needs port or socket to work without Zeroconf")
2936
2066
2937
# For convenience
2067
2938
debug = server_settings["debug"]
2068
2939
debuglevel = server_settings["debuglevel"]
2070
2941
use_ipv6 = server_settings["use_ipv6"]
2071
2942
stored_state_path = os.path.join(server_settings["statedir"],
2072
2943
stored_state_file)
2073
2944
foreground = server_settings["foreground"]
2945
zeroconf = server_settings["zeroconf"]
2946
2074
2947
if debug:
2075
2948
initlogger(debug, logging.DEBUG)
2076
2949
else:
2079
2952
else:
2080
2953
level = getattr(logging, debuglevel.upper())
2081
2954
initlogger(debug, level)
2082
2955
2083
2956
if server_settings["servicename"] != "Mandos":
2084
syslogger.setFormatter(logging.Formatter
2085
('Mandos (%s) [%%(process)d]:'
2086
' %%(levelname)s: %%(message)s'
2087
% server_settings["servicename"]))
2088
2957
syslogger.setFormatter(
2958
logging.Formatter('Mandos ({}) [%(process)d]:'
2959
' %(levelname)s: %(message)s'.format(
2960
server_settings["servicename"])))
2961
2089
2962
# Parse config file with clients
2090
2963
client_config = configparser.SafeConfigParser(Client
2091
2964
.client_defaults)
2092
2965
client_config.read(os.path.join(server_settings["configdir"],
2093
2966
"clients.conf"))
2094
2967
2095
2968
global mandos_dbus_service
2096
2969
mandos_dbus_service = None
2097
2098
tcp_server = MandosServer((server_settings["address"],
2099
server_settings["port"]),
2100
ClientHandler,
2101
interface=(server_settings["interface"]
2102
or None),
2103
use_ipv6=use_ipv6,
2104
gnutls_priority=
2105
server_settings["priority"],
2106
use_dbus=use_dbus)
2107
if not debug:
2108
pidfilename = "/var/run/mandos.pid"
2109
try:
2110
pidfile = open(pidfilename, "w")
2111
except IOError:
2112
logger.error("Could not open file %r", pidfilename)
2113
2114
try:
2115
uid = pwd.getpwnam("_mandos").pw_uid
2116
gid = pwd.getpwnam("_mandos").pw_gid
2117
except KeyError:
2118
try:
2119
uid = pwd.getpwnam("mandos").pw_uid
2120
gid = pwd.getpwnam("mandos").pw_gid
2970
2971
socketfd = None
2972
if server_settings["socket"] != "":
2973
socketfd = server_settings["socket"]
2974
tcp_server = MandosServer(
2975
(server_settings["address"], server_settings["port"]),
2976
ClientHandler,
2977
interface=(server_settings["interface"] or None),
2978
use_ipv6=use_ipv6,
2979
gnutls_priority=server_settings["priority"],
2980
use_dbus=use_dbus,
2981
socketfd=socketfd)
2982
if not foreground:
2983
pidfilename = "/run/mandos.pid"
2984
if not os.path.isdir("/run/."):
2985
pidfilename = "/var/run/mandos.pid"
2986
pidfile = None
2987
try:
2988
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2989
except IOError as e:
2990
logger.error("Could not open file %r", pidfilename,
2991
exc_info=e)
2992
2993
for name, group in (("_mandos", "_mandos"),
2994
("mandos", "mandos"),
2995
("nobody", "nogroup")):
2996
try:
2997
uid = pwd.getpwnam(name).pw_uid
2998
gid = pwd.getpwnam(group).pw_gid
2999
break
2121
3000
except KeyError:
2122
try:
2123
uid = pwd.getpwnam("nobody").pw_uid
2124
gid = pwd.getpwnam("nobody").pw_gid
2125
except KeyError:
2126
uid = 65534
2127
gid = 65534
3001
continue
3002
else:
3003
uid = 65534
3004
gid = 65534
2128
3005
try:
2129
3006
os.setgid(gid)
2130
3007
os.setuid(uid)
3008
if debug:
3009
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3010
gid))
2131
3011
except OSError as error:
2132
if error[0] != errno.EPERM:
2133
raise error
2134
3012
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3013
.format(uid, gid, os.strerror(error.errno)))
3014
if error.errno != errno.EPERM:
3015
raise
3016
2135
3017
if debug:
2136
3018
# Enable all possible GnuTLS debugging
2137
3019
2138
3020
# "Use a log level over 10 to enable all debugging options."
2139
3021
# - GnuTLS manual
2140
gnutls.library.functions.gnutls_global_set_log_level(11)
2141
2142
@gnutls.library.types.gnutls_log_func
3022
gnutls.global_set_log_level(11)
3023
3024
@gnutls.log_func
2143
3025
def debug_gnutls(level, string):
2144
3026
logger.debug("GnuTLS: %s", string[:-1])
2145
2146
(gnutls.library.functions
2147
.gnutls_global_set_log_function(debug_gnutls))
2148
3027
3028
gnutls.global_set_log_function(debug_gnutls)
3029
2149
3030
# Redirect stdin so all checkers get /dev/null
2150
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3031
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2151
3032
os.dup2(null, sys.stdin.fileno())
2152
3033
if null > 2:
2153
3034
os.close(null)
2154
3035
2155
3036
# Need to fork before connecting to D-Bus
2156
if not debug:
3037
if not foreground:
2157
3038
# Close all input and output, do double fork, etc.
2158
3039
daemon()
2159
2160
gobject.threads_init()
2161
3040
3041
# multiprocessing will use threads, so before we use GLib we need
3042
# to inform GLib that threads will be used.
3043
GLib.threads_init()
3044
2162
3045
global main_loop
2163
3046
# From the Avahi example code
2164
DBusGMainLoop(set_as_default=True )
2165
main_loop = gobject.MainLoop()
3047
DBusGMainLoop(set_as_default=True)
3048
main_loop = GLib.MainLoop()
2166
3049
bus = dbus.SystemBus()
2167
3050
# End of Avahi example code
2168
3051
if use_dbus:
2169
3052
try:
2170
3053
bus_name = dbus.service.BusName("se.recompile.Mandos",
2171
bus, do_not_queue=True)
2172
old_bus_name = (dbus.service.BusName
2173
("se.bsnet.fukt.Mandos", bus,
2174
do_not_queue=True))
2175
except dbus.exceptions.NameExistsException as e:
2176
logger.error(unicode(e) + ", disabling D-Bus")
3054
bus,
3055
do_not_queue=True)
3056
old_bus_name = dbus.service.BusName(
3057
"se.bsnet.fukt.Mandos", bus,
3058
do_not_queue=True)
3059
except dbus.exceptions.DBusException as e:
3060
logger.error("Disabling D-Bus:", exc_info=e)
2177
3061
use_dbus = False
2178
3062
server_settings["use_dbus"] = False
2179
3063
tcp_server.use_dbus = False
2180
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2181
service = AvahiServiceToSyslog(name =
2182
server_settings["servicename"],
2183
servicetype = "_mandos._tcp",
2184
protocol = protocol, bus = bus)
2185
if server_settings["interface"]:
2186
service.interface = (if_nametoindex
2187
(str(server_settings["interface"])))
2188
3064
if zeroconf:
3065
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3066
service = AvahiServiceToSyslog(
3067
name=server_settings["servicename"],
3068
servicetype="_mandos._tcp",
3069
protocol=protocol,
3070
bus=bus)
3071
if server_settings["interface"]:
3072
service.interface = if_nametoindex(
3073
server_settings["interface"].encode("utf-8"))
3074
2189
3075
global multiprocessing_manager
2190
3076
multiprocessing_manager = multiprocessing.Manager()
2191
3077
2192
3078
client_class = Client
2193
3079
if use_dbus:
2194
client_class = functools.partial(ClientDBusTransitional,
2195
bus = bus)
2196
3080
client_class = functools.partial(ClientDBus, bus=bus)
3081
2197
3082
client_settings = Client.config_parser(client_config)
2198
3083
old_client_settings = {}
2199
3084
clients_data = {}
2200
3085
3086
# This is used to redirect stdout and stderr for checker processes
3087
global wnull
3088
wnull = open(os.devnull, "w") # A writable /dev/null
3089
# Only used if server is running in foreground but not in debug
3090
# mode
3091
if debug or not foreground:
3092
wnull.close()
3093
2201
3094
# Get client data and settings from last running state.
2202
3095
if server_settings["restore"]:
2203
3096
try:
2204
3097
with open(stored_state_path, "rb") as stored_state:
2205
clients_data, old_client_settings = (pickle.load
2206
(stored_state))
3098
if sys.version_info.major == 2:
3099
clients_data, old_client_settings = pickle.load(
3100
stored_state)
3101
else:
3102
bytes_clients_data, bytes_old_client_settings = (
3103
pickle.load(stored_state, encoding="bytes"))
3104
# Fix bytes to strings
3105
# clients_data
3106
# .keys()
3107
clients_data = {(key.decode("utf-8")
3108
if isinstance(key, bytes)
3109
else key): value
3110
for key, value in
3111
bytes_clients_data.items()}
3112
del bytes_clients_data
3113
for key in clients_data:
3114
value = {(k.decode("utf-8")
3115
if isinstance(k, bytes) else k): v
3116
for k, v in
3117
clients_data[key].items()}
3118
clients_data[key] = value
3119
# .client_structure
3120
value["client_structure"] = [
3121
(s.decode("utf-8")
3122
if isinstance(s, bytes)
3123
else s) for s in
3124
value["client_structure"]]
3125
# .name & .host
3126
for k in ("name", "host"):
3127
if isinstance(value[k], bytes):
3128
value[k] = value[k].decode("utf-8")
3129
# old_client_settings
3130
# .keys()
3131
old_client_settings = {
3132
(key.decode("utf-8")
3133
if isinstance(key, bytes)
3134
else key): value
3135
for key, value in
3136
bytes_old_client_settings.items()}
3137
del bytes_old_client_settings
3138
# .host
3139
for value in old_client_settings.values():
3140
if isinstance(value["host"], bytes):
3141
value["host"] = (value["host"]
3142
.decode("utf-8"))
2207
3143
os.remove(stored_state_path)
2208
3144
except IOError as e:
2209
logger.warning("Could not load persistent state: {0}"
2210
.format(e))
2211
if e.errno != errno.ENOENT:
3145
if e.errno == errno.ENOENT:
3146
logger.warning("Could not load persistent state:"
3147
" {}".format(os.strerror(e.errno)))
3148
else:
3149
logger.critical("Could not load persistent state:",
3150
exc_info=e)
2212
3151
raise
2213
3152
except EOFError as e:
2214
3153
logger.warning("Could not load persistent state: "
2215
"EOFError: {0}".format(e))
2216
3154
"EOFError:",
3155
exc_info=e)
3156
2217
3157
with PGPEngine() as pgp:
2218
for client_name, client in clients_data.iteritems():
3158
for client_name, client in clients_data.items():
3159
# Skip removed clients
3160
if client_name not in client_settings:
3161
continue
3162
2219
3163
# Decide which value to use after restoring saved state.
2220
3164
# We have three different values: Old config file,
2221
3165
# new config file, and saved state.
2226
3170
# For each value in new config, check if it
2227
3171
# differs from the old config value (Except for
2228
3172
# the "secret" attribute)
2229
if (name != "secret" and
2230
value != old_client_settings[client_name]
2231
[name]):
3173
if (name != "secret"
3174
and (value !=
3175
old_client_settings[client_name][name])):
2232
3176
client[name] = value
2233
3177
except KeyError:
2234
3178
pass
2235
3179
2236
3180
# Clients who has passed its expire date can still be
2237
# enabled if its last checker was successful. Clients
3181
# enabled if its last checker was successful. A Client
2238
3182
# whose checker succeeded before we stored its state is
2239
3183
# assumed to have successfully run all checkers during
2240
3184
# downtime.
2242
3186
if datetime.datetime.utcnow() >= client["expires"]:
2243
3187
if not client["last_checked_ok"]:
2244
3188
logger.warning(
2245
"disabling client {0} - Client never "
2246
"performed a successful checker"
2247
.format(client_name))
3189
"disabling client {} - Client never "
3190
"performed a successful checker".format(
3191
client_name))
2248
3192
client["enabled"] = False
2249
3193
elif client["last_checker_status"] != 0:
2250
3194
logger.warning(
2251
"disabling client {0} - Client "
2252
"last checker failed with error code {1}"
2253
.format(client_name,
2254
client["last_checker_status"]))
3195
"disabling client {} - Client last"
3196
" checker failed with error code"
3197
" {}".format(
3198
client_name,
3199
client["last_checker_status"]))
2255
3200
client["enabled"] = False
2256
3201
else:
2257
client["expires"] = (datetime.datetime
2258
.utcnow()
2259
+ client["timeout"])
3202
client["expires"] = (
3203
datetime.datetime.utcnow()
3204
+ client["timeout"])
2260
3205
logger.debug("Last checker succeeded,"
2261
" keeping {0} enabled"
2262
.format(client_name))
3206
" keeping {} enabled".format(
3207
client_name))
2263
3208
try:
2264
client["secret"] = (
2265
pgp.decrypt(client["encrypted_secret"],
2266
client_settings[client_name]
2267
["secret"]))
3209
client["secret"] = pgp.decrypt(
3210
client["encrypted_secret"],
3211
client_settings[client_name]["secret"])
2268
3212
except PGPError:
2269
3213
# If decryption fails, we use secret from new settings
2270
logger.debug("Failed to decrypt {0} old secret"
2271
.format(client_name))
2272
client["secret"] = (
2273
client_settings[client_name]["secret"])
3214
logger.debug("Failed to decrypt {} old secret".format(
3215
client_name))
3216
client["secret"] = (client_settings[client_name]
3217
["secret"])
2274
3218
2275
2276
3219
# Add/remove clients based on new changes made to config
2277
3220
for client_name in (set(old_client_settings)
2278
3221
- set(client_settings)):
2282
3225
clients_data[client_name] = client_settings[client_name]
2283
3226
2284
3227
# Create all client objects
2285
for client_name, client in clients_data.iteritems():
3228
for client_name, client in clients_data.items():
2286
3229
tcp_server.clients[client_name] = client_class(
2287
name = client_name, settings = client)
2288
3230
name=client_name,
3231
settings=client,
3232
server_settings=server_settings)
3233
2289
3234
if not tcp_server.clients:
2290
3235
logger.warning("No clients defined")
2291
2292
if not debug:
2293
try:
2294
with pidfile:
2295
pid = os.getpid()
2296
pidfile.write(str(pid) + "\n".encode("utf-8"))
2297
del pidfile
2298
except IOError:
2299
logger.error("Could not write to file %r with PID %d",
2300
pidfilename, pid)
2301
except NameError:
2302
# "pidfile" was never created
2303
pass
3236
3237
if not foreground:
3238
if pidfile is not None:
3239
pid = os.getpid()
3240
try:
3241
with pidfile:
3242
print(pid, file=pidfile)
3243
except IOError:
3244
logger.error("Could not write to file %r with PID %d",
3245
pidfilename, pid)
3246
del pidfile
2304
3247
del pidfilename
2305
signal.signal(signal.SIGINT, signal.SIG_IGN)
2306
2307
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2308
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2309
3248
3249
for termsig in (signal.SIGHUP, signal.SIGTERM):
3250
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3251
lambda: main_loop.quit() and False)
3252
2310
3253
if use_dbus:
2311
class MandosDBusService(dbus.service.Object):
3254
3255
@alternate_dbus_interfaces(
3256
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3257
class MandosDBusService(DBusObjectWithObjectManager):
2312
3258
"""A D-Bus proxy object"""
3259
2313
3260
def __init__(self):
2314
3261
dbus.service.Object.__init__(self, bus, "/")
3262
2315
3263
_interface = "se.recompile.Mandos"
2316
3264
2317
3265
@dbus.service.signal(_interface, signature="o")
2318
3266
def ClientAdded(self, objpath):
2319
3267
"D-Bus signal"
2320
3268
pass
2321
3269
2322
3270
@dbus.service.signal(_interface, signature="ss")
2323
3271
def ClientNotFound(self, fingerprint, address):
2324
3272
"D-Bus signal"
2325
3273
pass
2326
3274
3275
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3276
"true"})
2327
3277
@dbus.service.signal(_interface, signature="os")
2328
3278
def ClientRemoved(self, objpath, name):
2329
3279
"D-Bus signal"
2330
3280
pass
2331
3281
3282
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3283
"true"})
2332
3284
@dbus.service.method(_interface, out_signature="ao")
2333
3285
def GetAllClients(self):
2334
3286
"D-Bus method"
2335
return dbus.Array(c.dbus_object_path
2336
for c in
2337
tcp_server.clients.itervalues())
2338
3287
return dbus.Array(c.dbus_object_path for c in
3288
tcp_server.clients.values())
3289
3290
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3291
"true"})
2339
3292
@dbus.service.method(_interface,
2340
3293
out_signature="a{oa{sv}}")
2341
3294
def GetAllClientsWithProperties(self):
2342
3295
"D-Bus method"
2343
3296
return dbus.Dictionary(
2344
((c.dbus_object_path, c.GetAll(""))
2345
for c in tcp_server.clients.itervalues()),
3297
{c.dbus_object_path: c.GetAll(
3298
"se.recompile.Mandos.Client")
3299
for c in tcp_server.clients.values()},
2346
3300
signature="oa{sv}")
2347
3301
2348
3302
@dbus.service.method(_interface, in_signature="o")
2349
3303
def RemoveClient(self, object_path):
2350
3304
"D-Bus method"
2351
for c in tcp_server.clients.itervalues():
3305
for c in tcp_server.clients.values():
2352
3306
if c.dbus_object_path == object_path:
2353
3307
del tcp_server.clients[c.name]
2354
3308
c.remove_from_connection()
2355
# Don't signal anything except ClientRemoved
3309
# Don't signal the disabling
2356
3310
c.disable(quiet=True)
2357
# Emit D-Bus signal
2358
self.ClientRemoved(object_path, c.name)
3311
# Emit D-Bus signal for removal
3312
self.client_removed_signal(c)
2359
3313
return
2360
3314
raise KeyError(object_path)
2361
3315
2362
3316
del _interface
2363
2364
class MandosDBusServiceTransitional(MandosDBusService):
2365
__metaclass__ = AlternateDBusNamesMetaclass
2366
mandos_dbus_service = MandosDBusServiceTransitional()
2367
3317
3318
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3319
out_signature="a{oa{sa{sv}}}")
3320
def GetManagedObjects(self):
3321
"""D-Bus method"""
3322
return dbus.Dictionary(
3323
{client.dbus_object_path:
3324
dbus.Dictionary(
3325
{interface: client.GetAll(interface)
3326
for interface in
3327
client._get_all_interface_names()})
3328
for client in tcp_server.clients.values()})
3329
3330
def client_added_signal(self, client):
3331
"""Send the new standard signal and the old signal"""
3332
if use_dbus:
3333
# New standard signal
3334
self.InterfacesAdded(
3335
client.dbus_object_path,
3336
dbus.Dictionary(
3337
{interface: client.GetAll(interface)
3338
for interface in
3339
client._get_all_interface_names()}))
3340
# Old signal
3341
self.ClientAdded(client.dbus_object_path)
3342
3343
def client_removed_signal(self, client):
3344
"""Send the new standard signal and the old signal"""
3345
if use_dbus:
3346
# New standard signal
3347
self.InterfacesRemoved(
3348
client.dbus_object_path,
3349
client._get_all_interface_names())
3350
# Old signal
3351
self.ClientRemoved(client.dbus_object_path,
3352
client.name)
3353
3354
mandos_dbus_service = MandosDBusService()
3355
3356
# Save modules to variables to exempt the modules from being
3357
# unloaded before the function registered with atexit() is run.
3358
mp = multiprocessing
3359
wn = wnull
3360
2368
3361
def cleanup():
2369
3362
"Cleanup function; run on exit"
2370
service.cleanup()
2371
2372
multiprocessing.active_children()
3363
if zeroconf:
3364
service.cleanup()
3365
3366
mp.active_children()
3367
wn.close()
2373
3368
if not (tcp_server.clients or client_settings):
2374
3369
return
2375
3370
2376
3371
# Store client before exiting. Secrets are encrypted with key
2377
3372
# based on what config file has. If config file is
2378
3373
# removed/edited, old secret will thus be unrecovable.
2379
3374
clients = {}
2380
3375
with PGPEngine() as pgp:
2381
for client in tcp_server.clients.itervalues():
3376
for client in tcp_server.clients.values():
2382
3377
key = client_settings[client.name]["secret"]
2383
3378
client.encrypted_secret = pgp.encrypt(client.secret,
2384
3379
key)
2385
3380
client_dict = {}
2386
3381
2387
3382
# A list of attributes that can not be pickled
2388
3383
# + secret.
2389
exclude = set(("bus", "changedstate", "secret",
2390
"checker"))
2391
for name, typ in (inspect.getmembers
2392
(dbus.service.Object)):
3384
exclude = {"bus", "changedstate", "secret",
3385
"checker", "server_settings"}
3386
for name, typ in inspect.getmembers(dbus.service
3387
.Object):
2393
3388
exclude.add(name)
2394
3389
2395
3390
client_dict["encrypted_secret"] = (client
2396
3391
.encrypted_secret)
2397
3392
for attr in client.client_structure:
2398
3393
if attr not in exclude:
2399
3394
client_dict[attr] = getattr(client, attr)
2400
3395
2401
3396
clients[client.name] = client_dict
2402
3397
del client_settings[client.name]["secret"]
2403
3398
2404
3399
try:
2405
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2406
prefix="clients-",
2407
dir=os.path.dirname
2408
(stored_state_path))
2409
with os.fdopen(tempfd, "wb") as stored_state:
2410
pickle.dump((clients, client_settings), stored_state)
3400
with tempfile.NamedTemporaryFile(
3401
mode='wb',
3402
suffix=".pickle",
3403
prefix='clients-',
3404
dir=os.path.dirname(stored_state_path),
3405
delete=False) as stored_state:
3406
pickle.dump((clients, client_settings), stored_state,
3407
protocol=2)
3408
tempname = stored_state.name
2411
3409
os.rename(tempname, stored_state_path)
2412
3410
except (IOError, OSError) as e:
2413
logger.warning("Could not save persistent state: {0}"
2414
.format(e))
2415
3411
if not debug:
2416
3412
try:
2417
3413
os.remove(tempname)
2418
3414
except NameError:
2419
3415
pass
2420
if e.errno not in set((errno.ENOENT, errno.EACCES,
2421
errno.EEXIST)):
2422
raise e
2423
3416
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3417
logger.warning("Could not save persistent state: {}"
3418
.format(os.strerror(e.errno)))
3419
else:
3420
logger.warning("Could not save persistent state:",
3421
exc_info=e)
3422
raise
3423
2424
3424
# Delete all clients, and settings from config
2425
3425
while tcp_server.clients:
2426
3426
name, client = tcp_server.clients.popitem()
2427
3427
if use_dbus:
2428
3428
client.remove_from_connection()
2429
# Don't signal anything except ClientRemoved
3429
# Don't signal the disabling
2430
3430
client.disable(quiet=True)
3431
# Emit D-Bus signal for removal
2431
3432
if use_dbus:
2432
# Emit D-Bus signal
2433
mandos_dbus_service.ClientRemoved(client
2434
.dbus_object_path,
2435
client.name)
3433
mandos_dbus_service.client_removed_signal(client)
2436
3434
client_settings.clear()
2437
3435
2438
3436
atexit.register(cleanup)
2439
2440
for client in tcp_server.clients.itervalues():
3437
3438
for client in tcp_server.clients.values():
2441
3439
if use_dbus:
2442
# Emit D-Bus signal
2443
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3440
# Emit D-Bus signal for adding
3441
mandos_dbus_service.client_added_signal(client)
2444
3442
# Need to initiate checking of clients
2445
3443
if client.enabled:
2446
3444
client.init_checker()
2447
3445
2448
3446
tcp_server.enable()
2449
3447
tcp_server.server_activate()
2450
3448
2451
3449
# Find out what port we got
2452
service.port = tcp_server.socket.getsockname()[1]
3450
if zeroconf:
3451
service.port = tcp_server.socket.getsockname()[1]
2453
3452
if use_ipv6:
2454
3453
logger.info("Now listening on address %r, port %d,"
2455
" flowinfo %d, scope_id %d"
2456
% tcp_server.socket.getsockname())
3454
" flowinfo %d, scope_id %d",
3455
*tcp_server.socket.getsockname())
2457
3456
else: # IPv4
2458
logger.info("Now listening on address %r, port %d"
2459
% tcp_server.socket.getsockname())
2460
2461
#service.interface = tcp_server.socket.getsockname()[3]
2462
3457
logger.info("Now listening on address %r, port %d",
3458
*tcp_server.socket.getsockname())
3459
3460
# service.interface = tcp_server.socket.getsockname()[3]
3461
2463
3462
try:
2464
# From the Avahi example code
2465
try:
2466
service.activate()
2467
except dbus.exceptions.DBusException as error:
2468
logger.critical("DBusException: %s", error)
2469
cleanup()
2470
sys.exit(1)
2471
# End of Avahi example code
2472
2473
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2474
lambda *args, **kwargs:
2475
(tcp_server.handle_request
2476
(*args[2:], **kwargs) or True))
2477
3463
if zeroconf:
3464
# From the Avahi example code
3465
try:
3466
service.activate()
3467
except dbus.exceptions.DBusException as error:
3468
logger.critical("D-Bus Exception", exc_info=error)
3469
cleanup()
3470
sys.exit(1)
3471
# End of Avahi example code
3472
3473
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3474
lambda *args, **kwargs:
3475
(tcp_server.handle_request
3476
(*args[2:], **kwargs) or True))
3477
2478
3478
logger.debug("Starting main loop")
2479
3479
main_loop.run()
2480
3480
except AvahiError as error:
2481
logger.critical("AvahiError: %s", error)
3481
logger.critical("Avahi Error", exc_info=error)
2482
3482
cleanup()
2483
3483
sys.exit(1)
2484
3484
except KeyboardInterrupt:
2489
3489
# Must run before the D-Bus bus name gets deregistered
2490
3490
cleanup()
2491
3491
3492
2492
3493
if __name__ == '__main__':
2493
3494
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0