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- Committer: Teddy Hogeborn
- Date: 2019-02-13 08:47:02 UTC
- Revision ID: teddy@recompile.se-20190213084702-oca64n46uaf85kr3
Merge from trunk
- files added:
- bugs.xml
- debian/upstream
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- 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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#
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#
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6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2012 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 © 2008-2019 Teddy Hogeborn
15
# Copyright © 2008-2019 Björn Påhlsson
16
#
17
# This file is part of Mandos.
18
#
19
# Mandos is free software: you can redistribute it and/or modify it
20
# under the terms of the GNU General Public License as published by
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
76
87
import xml.dom.minidom
77
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import inspect
78
import GnuPGInterface
79
89
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# Try to find the value of SO_BINDTODEVICE:
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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 = "1.4.1"
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 = "1.8.3"
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):
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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(*args, **kwargs)
500
syslogger.setFormatter(logging.Formatter(
501
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
502
.format(self.name)))
380
503
return ret
381
504
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
505
506
# Pretend that we have a GnuTLS module
507
class GnuTLS(object):
508
"""This isn't so much a class as it is a module-like namespace.
509
It is instantiated once, and simulates having a GnuTLS module."""
510
511
library = ctypes.util.find_library("gnutls")
512
if library is None:
513
library = ctypes.util.find_library("gnutls-deb0")
514
_library = ctypes.cdll.LoadLibrary(library)
515
del library
516
_need_version = b"3.3.0"
517
_tls_rawpk_version = b"3.6.6"
518
519
def __init__(self):
520
# Need to use "self" here, since this method is called before
521
# the assignment to the "gnutls" global variable happens.
522
if self.check_version(self._need_version) is None:
523
raise self.Error("Needs GnuTLS {} or later"
524
.format(self._need_version))
525
526
# Unless otherwise indicated, the constants and types below are
527
# all from the gnutls/gnutls.h C header file.
528
529
# Constants
530
E_SUCCESS = 0
531
E_INTERRUPTED = -52
532
E_AGAIN = -28
533
CRT_OPENPGP = 2
534
CRT_RAWPK = 3
535
CLIENT = 2
536
SHUT_RDWR = 0
537
CRD_CERTIFICATE = 1
538
E_NO_CERTIFICATE_FOUND = -49
539
X509_FMT_DER = 0
540
NO_TICKETS = 1<<10
541
ENABLE_RAWPK = 1<<18
542
CTYPE_PEERS = 3
543
KEYID_USE_SHA256 = 1 # gnutls/x509.h
544
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
545
546
# Types
547
class session_int(ctypes.Structure):
548
_fields_ = []
549
session_t = ctypes.POINTER(session_int)
550
551
class certificate_credentials_st(ctypes.Structure):
552
_fields_ = []
553
certificate_credentials_t = ctypes.POINTER(
554
certificate_credentials_st)
555
certificate_type_t = ctypes.c_int
556
557
class datum_t(ctypes.Structure):
558
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
559
('size', ctypes.c_uint)]
560
561
class openpgp_crt_int(ctypes.Structure):
562
_fields_ = []
563
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
564
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
565
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
566
credentials_type_t = ctypes.c_int
567
transport_ptr_t = ctypes.c_void_p
568
close_request_t = ctypes.c_int
569
570
# Exceptions
571
class Error(Exception):
572
# We need to use the class name "GnuTLS" here, since this
573
# exception might be raised from within GnuTLS.__init__,
574
# which is called before the assignment to the "gnutls"
575
# global variable has happened.
576
def __init__(self, message=None, code=None, args=()):
577
# Default usage is by a message string, but if a return
578
# code is passed, convert it to a string with
579
# gnutls.strerror()
580
self.code = code
581
if message is None and code is not None:
582
message = GnuTLS.strerror(code)
583
return super(GnuTLS.Error, self).__init__(
584
message, *args)
585
586
class CertificateSecurityError(Error):
587
pass
588
589
# Classes
590
class Credentials(object):
591
def __init__(self):
592
self._c_object = gnutls.certificate_credentials_t()
593
gnutls.certificate_allocate_credentials(
594
ctypes.byref(self._c_object))
595
self.type = gnutls.CRD_CERTIFICATE
596
597
def __del__(self):
598
gnutls.certificate_free_credentials(self._c_object)
599
600
class ClientSession(object):
601
def __init__(self, socket, credentials=None):
602
self._c_object = gnutls.session_t()
603
gnutls_flags = gnutls.CLIENT
604
if gnutls.check_version("3.5.6"):
605
gnutls_flags |= gnutls.NO_TICKETS
606
if gnutls.has_rawpk:
607
gnutls_flags |= gnutls.ENABLE_RAWPK
608
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
609
del gnutls_flags
610
gnutls.set_default_priority(self._c_object)
611
gnutls.transport_set_ptr(self._c_object, socket.fileno())
612
gnutls.handshake_set_private_extensions(self._c_object,
613
True)
614
self.socket = socket
615
if credentials is None:
616
credentials = gnutls.Credentials()
617
gnutls.credentials_set(self._c_object, credentials.type,
618
ctypes.cast(credentials._c_object,
619
ctypes.c_void_p))
620
self.credentials = credentials
621
622
def __del__(self):
623
gnutls.deinit(self._c_object)
624
625
def handshake(self):
626
return gnutls.handshake(self._c_object)
627
628
def send(self, data):
629
data = bytes(data)
630
data_len = len(data)
631
while data_len > 0:
632
data_len -= gnutls.record_send(self._c_object,
633
data[-data_len:],
634
data_len)
635
636
def bye(self):
637
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
638
639
# Error handling functions
640
def _error_code(result):
641
"""A function to raise exceptions on errors, suitable
642
for the 'restype' attribute on ctypes functions"""
643
if result >= 0:
644
return result
645
if result == gnutls.E_NO_CERTIFICATE_FOUND:
646
raise gnutls.CertificateSecurityError(code=result)
647
raise gnutls.Error(code=result)
648
649
def _retry_on_error(result, func, arguments):
650
"""A function to retry on some errors, suitable
651
for the 'errcheck' attribute on ctypes functions"""
652
while result < 0:
653
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
654
return _error_code(result)
655
result = func(*arguments)
656
return result
657
658
# Unless otherwise indicated, the function declarations below are
659
# all from the gnutls/gnutls.h C header file.
660
661
# Functions
662
priority_set_direct = _library.gnutls_priority_set_direct
663
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
664
ctypes.POINTER(ctypes.c_char_p)]
665
priority_set_direct.restype = _error_code
666
667
init = _library.gnutls_init
668
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
669
init.restype = _error_code
670
671
set_default_priority = _library.gnutls_set_default_priority
672
set_default_priority.argtypes = [session_t]
673
set_default_priority.restype = _error_code
674
675
record_send = _library.gnutls_record_send
676
record_send.argtypes = [session_t, ctypes.c_void_p,
677
ctypes.c_size_t]
678
record_send.restype = ctypes.c_ssize_t
679
record_send.errcheck = _retry_on_error
680
681
certificate_allocate_credentials = (
682
_library.gnutls_certificate_allocate_credentials)
683
certificate_allocate_credentials.argtypes = [
684
ctypes.POINTER(certificate_credentials_t)]
685
certificate_allocate_credentials.restype = _error_code
686
687
certificate_free_credentials = (
688
_library.gnutls_certificate_free_credentials)
689
certificate_free_credentials.argtypes = [
690
certificate_credentials_t]
691
certificate_free_credentials.restype = None
692
693
handshake_set_private_extensions = (
694
_library.gnutls_handshake_set_private_extensions)
695
handshake_set_private_extensions.argtypes = [session_t,
696
ctypes.c_int]
697
handshake_set_private_extensions.restype = None
698
699
credentials_set = _library.gnutls_credentials_set
700
credentials_set.argtypes = [session_t, credentials_type_t,
701
ctypes.c_void_p]
702
credentials_set.restype = _error_code
703
704
strerror = _library.gnutls_strerror
705
strerror.argtypes = [ctypes.c_int]
706
strerror.restype = ctypes.c_char_p
707
708
certificate_type_get = _library.gnutls_certificate_type_get
709
certificate_type_get.argtypes = [session_t]
710
certificate_type_get.restype = _error_code
711
712
certificate_get_peers = _library.gnutls_certificate_get_peers
713
certificate_get_peers.argtypes = [session_t,
714
ctypes.POINTER(ctypes.c_uint)]
715
certificate_get_peers.restype = ctypes.POINTER(datum_t)
716
717
global_set_log_level = _library.gnutls_global_set_log_level
718
global_set_log_level.argtypes = [ctypes.c_int]
719
global_set_log_level.restype = None
720
721
global_set_log_function = _library.gnutls_global_set_log_function
722
global_set_log_function.argtypes = [log_func]
723
global_set_log_function.restype = None
724
725
deinit = _library.gnutls_deinit
726
deinit.argtypes = [session_t]
727
deinit.restype = None
728
729
handshake = _library.gnutls_handshake
730
handshake.argtypes = [session_t]
731
handshake.restype = _error_code
732
handshake.errcheck = _retry_on_error
733
734
transport_set_ptr = _library.gnutls_transport_set_ptr
735
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
736
transport_set_ptr.restype = None
737
738
bye = _library.gnutls_bye
739
bye.argtypes = [session_t, close_request_t]
740
bye.restype = _error_code
741
bye.errcheck = _retry_on_error
742
743
check_version = _library.gnutls_check_version
744
check_version.argtypes = [ctypes.c_char_p]
745
check_version.restype = ctypes.c_char_p
746
747
has_rawpk = bool(check_version(_tls_rawpk_version))
748
749
if has_rawpk:
750
# Types
751
class pubkey_st(ctypes.Structure):
752
_fields = []
753
pubkey_t = ctypes.POINTER(pubkey_st)
754
755
x509_crt_fmt_t = ctypes.c_int
756
757
# All the function declarations below are from gnutls/abstract.h
758
pubkey_init = _library.gnutls_pubkey_init
759
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
760
pubkey_init.restype = _error_code
761
762
pubkey_import = _library.gnutls_pubkey_import
763
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
764
x509_crt_fmt_t]
765
pubkey_import.restype = _error_code
766
767
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
768
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
769
ctypes.POINTER(ctypes.c_ubyte),
770
ctypes.POINTER(ctypes.c_size_t)]
771
pubkey_get_key_id.restype = _error_code
772
773
pubkey_deinit = _library.gnutls_pubkey_deinit
774
pubkey_deinit.argtypes = [pubkey_t]
775
pubkey_deinit.restype = None
776
else:
777
# All the function declarations below are from gnutls/openpgp.h
778
779
openpgp_crt_init = _library.gnutls_openpgp_crt_init
780
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
781
openpgp_crt_init.restype = _error_code
782
783
openpgp_crt_import = _library.gnutls_openpgp_crt_import
784
openpgp_crt_import.argtypes = [openpgp_crt_t,
785
ctypes.POINTER(datum_t),
786
openpgp_crt_fmt_t]
787
openpgp_crt_import.restype = _error_code
788
789
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
790
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
791
ctypes.POINTER(ctypes.c_uint)]
792
openpgp_crt_verify_self.restype = _error_code
793
794
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
795
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
796
openpgp_crt_deinit.restype = None
797
798
openpgp_crt_get_fingerprint = (
799
_library.gnutls_openpgp_crt_get_fingerprint)
800
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
801
ctypes.c_void_p,
802
ctypes.POINTER(
803
ctypes.c_size_t)]
804
openpgp_crt_get_fingerprint.restype = _error_code
805
806
if check_version("3.6.4"):
807
certificate_type_get2 = _library.gnutls_certificate_type_get2
808
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
809
certificate_type_get2.restype = _error_code
810
811
# Remove non-public functions
812
del _error_code, _retry_on_error
813
# Create the global "gnutls" object, simulating a module
814
gnutls = GnuTLS()
815
816
817
def call_pipe(connection, # : multiprocessing.Connection
818
func, *args, **kwargs):
819
"""This function is meant to be called by multiprocessing.Process
820
821
This function runs func(*args, **kwargs), and writes the resulting
822
return value on the provided multiprocessing.Connection.
823
"""
824
connection.send(func(*args, **kwargs))
825
connection.close()
826
827
388
828
class Client(object):
389
829
"""A representation of a client host served by this server.
390
830
391
831
Attributes:
392
832
approved: bool(); 'None' if not yet approved/disapproved
393
833
approval_delay: datetime.timedelta(); Time to wait for approval
395
835
checker: subprocess.Popen(); a running checker process used
396
836
to see if the client lives.
397
837
'None' if no process is running.
398
checker_callback_tag: a gobject event source tag, or None
838
checker_callback_tag: a GLib event source tag, or None
399
839
checker_command: string; External command which is run to check
400
840
if client lives. %() expansions are done at
401
841
runtime with vars(self) as dict, so that for
402
842
instance %(name)s can be used in the command.
403
checker_initiator_tag: a gobject event source tag, or None
843
checker_initiator_tag: a GLib event source tag, or None
404
844
created: datetime.datetime(); (UTC) object creation
405
845
client_structure: Object describing what attributes a client has
406
846
and is used for storing the client at exit
407
847
current_checker_command: string; current running checker_command
408
disable_initiator_tag: a gobject event source tag, or None
848
disable_initiator_tag: a GLib event source tag, or None
409
849
enabled: bool()
410
850
fingerprint: string (40 or 32 hexadecimal digits); used to
411
uniquely identify the client
851
uniquely identify an OpenPGP client
852
key_id: string (64 hexadecimal digits); used to uniquely identify
853
a client using raw public keys
412
854
host: string; available for use by the checker command
413
855
interval: datetime.timedelta(); How often to start a new checker
414
856
last_approval_request: datetime.datetime(); (UTC) or None
415
857
last_checked_ok: datetime.datetime(); (UTC) or None
416
858
last_checker_status: integer between 0 and 255 reflecting exit
417
859
status of last checker. -1 reflects crashed
418
checker, or None.
860
checker, -2 means no checker completed yet.
861
last_checker_signal: The signal which killed the last checker, if
862
last_checker_status is -1
419
863
last_enabled: datetime.datetime(); (UTC) or None
420
864
name: string; from the config file, used in log messages and
421
865
D-Bus identifiers
422
866
secret: bytestring; sent verbatim (over TLS) to client
423
867
timeout: datetime.timedelta(); How long from last_checked_ok
424
868
until this client is disabled
425
extended_timeout: extra long timeout when password has been sent
869
extended_timeout: extra long timeout when secret has been sent
426
870
runtime_expansions: Allowed attributes for runtime expansion.
427
871
expires: datetime.datetime(); time (UTC) when a client will be
428
872
disabled, or None
873
server_settings: The server_settings dict from main()
429
874
"""
430
875
431
876
runtime_expansions = ("approval_delay", "approval_duration",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
877
"created", "enabled", "expires", "key_id",
878
"fingerprint", "host", "interval",
879
"last_approval_request", "last_checked_ok",
434
880
"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)
881
client_defaults = {
882
"timeout": "PT5M",
883
"extended_timeout": "PT15M",
884
"interval": "PT2M",
885
"checker": "fping -q -- %%(host)s",
886
"host": "",
887
"approval_delay": "PT0S",
888
"approval_duration": "PT1S",
889
"approved_by_default": "True",
890
"enabled": "True",
891
}
460
892
461
893
@staticmethod
462
894
def config_parser(config):
470
902
for client_name in config.sections():
471
903
section = dict(config.items(client_name))
472
904
client = settings[client_name] = {}
473
905
474
906
client["host"] = section["host"]
475
907
# Reformat values from string types to Python types
476
908
client["approved_by_default"] = config.getboolean(
477
909
client_name, "approved_by_default")
478
910
client["enabled"] = config.getboolean(client_name,
479
911
"enabled")
480
912
913
# Uppercase and remove spaces from key_id and fingerprint
914
# for later comparison purposes with return value from the
915
# key_id() and fingerprint() functions
916
client["key_id"] = (section.get("key_id", "").upper()
917
.replace(" ", ""))
481
918
client["fingerprint"] = (section["fingerprint"].upper()
482
919
.replace(" ", ""))
483
920
if "secret" in section:
484
client["secret"] = section["secret"].decode("base64")
921
client["secret"] = codecs.decode(section["secret"]
922
.encode("utf-8"),
923
"base64")
485
924
elif "secfile" in section:
486
925
with open(os.path.expanduser(os.path.expandvars
487
926
(section["secfile"])),
488
927
"rb") as secfile:
489
928
client["secret"] = secfile.read()
490
929
else:
491
raise TypeError("No secret or secfile for section %s"
492
% section)
930
raise TypeError("No secret or secfile for section {}"
931
.format(section))
493
932
client["timeout"] = string_to_delta(section["timeout"])
494
933
client["extended_timeout"] = string_to_delta(
495
934
section["extended_timeout"])
501
940
client["checker_command"] = section["checker"]
502
941
client["last_approval_request"] = None
503
942
client["last_checked_ok"] = None
504
client["last_checker_status"] = None
505
943
client["last_checker_status"] = -2
944
506
945
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."""
946
947
def __init__(self, settings, name=None, server_settings=None):
513
948
self.name = name
949
if server_settings is None:
950
server_settings = {}
951
self.server_settings = server_settings
514
952
# adding all client settings
515
for setting, value in settings.iteritems():
953
for setting, value in settings.items():
516
954
setattr(self, setting, value)
517
955
518
956
if self.enabled:
519
957
if not hasattr(self, "last_enabled"):
520
958
self.last_enabled = datetime.datetime.utcnow()
524
962
else:
525
963
self.last_enabled = None
526
964
self.expires = None
527
965
528
966
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
967
logger.debug(" Key ID: %s", self.key_id)
532
968
logger.debug(" Fingerprint: %s", self.fingerprint)
533
969
self.created = settings.get("created",
534
970
datetime.datetime.utcnow())
541
977
self.current_checker_command = None
542
978
self.approved = None
543
979
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()
980
self.changedstate = multiprocessing_manager.Condition(
981
multiprocessing_manager.Lock())
982
self.client_structure = [attr
983
for attr in self.__dict__.keys()
549
984
if not attr.startswith("_")]
550
985
self.client_structure.append("client_structure")
551
552
for name, t in inspect.getmembers(type(self),
553
lambda obj:
554
isinstance(obj,
555
property)):
986
987
for name, t in inspect.getmembers(
988
type(self), lambda obj: isinstance(obj, property)):
556
989
if not name.startswith("_"):
557
990
self.client_structure.append(name)
558
991
559
992
# Send notice to process children that client state has changed
560
993
def send_changedstate(self):
561
994
with self.changedstate:
562
995
self.changedstate.notify_all()
563
996
564
997
def enable(self):
565
998
"""Start this client's checker and timeout hooks"""
566
999
if getattr(self, "enabled", False):
567
1000
# Already enabled
568
1001
return
569
self.send_changedstate()
570
1002
self.expires = datetime.datetime.utcnow() + self.timeout
571
1003
self.enabled = True
572
1004
self.last_enabled = datetime.datetime.utcnow()
573
1005
self.init_checker()
574
1006
self.send_changedstate()
1007
575
1008
def disable(self, quiet=True):
576
1009
"""Disable this client."""
577
1010
if not getattr(self, "enabled", False):
578
1011
return False
579
1012
if not quiet:
580
self.send_changedstate()
581
if not quiet:
582
1013
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", False):
584
gobject.source_remove(self.disable_initiator_tag)
1014
if getattr(self, "disable_initiator_tag", None) is not None:
1015
GLib.source_remove(self.disable_initiator_tag)
585
1016
self.disable_initiator_tag = None
586
1017
self.expires = None
587
if getattr(self, "checker_initiator_tag", False):
588
gobject.source_remove(self.checker_initiator_tag)
1018
if getattr(self, "checker_initiator_tag", None) is not None:
1019
GLib.source_remove(self.checker_initiator_tag)
589
1020
self.checker_initiator_tag = None
590
1021
self.stop_checker()
591
1022
self.enabled = False
592
# Do not run this again if called by a gobject.timeout_add
1023
if not quiet:
1024
self.send_changedstate()
1025
# Do not run this again if called by a GLib.timeout_add
593
1026
return False
594
1027
595
1028
def __del__(self):
596
1029
self.disable()
597
1030
598
1031
def init_checker(self):
599
1032
# Schedule a new checker to be started an 'interval' from now,
600
1033
# and every interval from then on.
601
self.checker_initiator_tag = (gobject.timeout_add
602
(self.interval_milliseconds(),
603
self.start_checker))
1034
if self.checker_initiator_tag is not None:
1035
GLib.source_remove(self.checker_initiator_tag)
1036
self.checker_initiator_tag = GLib.timeout_add(
1037
int(self.interval.total_seconds() * 1000),
1038
self.start_checker)
604
1039
# Schedule a disable() when 'timeout' has passed
605
self.disable_initiator_tag = (gobject.timeout_add
606
(self.timeout_milliseconds(),
607
self.disable))
1040
if self.disable_initiator_tag is not None:
1041
GLib.source_remove(self.disable_initiator_tag)
1042
self.disable_initiator_tag = GLib.timeout_add(
1043
int(self.timeout.total_seconds() * 1000), self.disable)
608
1044
# Also start a new checker *right now*.
609
1045
self.start_checker()
610
611
def checker_callback(self, pid, condition, command):
1046
1047
def checker_callback(self, source, condition, connection,
1048
command):
612
1049
"""The checker has completed, so take appropriate actions."""
613
1050
self.checker_callback_tag = None
614
1051
self.checker = None
615
if os.WIFEXITED(condition):
616
self.last_checker_status = os.WEXITSTATUS(condition)
1052
# Read return code from connection (see call_pipe)
1053
returncode = connection.recv()
1054
connection.close()
1055
1056
if returncode >= 0:
1057
self.last_checker_status = returncode
1058
self.last_checker_signal = None
617
1059
if self.last_checker_status == 0:
618
1060
logger.info("Checker for %(name)s succeeded",
619
1061
vars(self))
620
1062
self.checked_ok()
621
1063
else:
622
logger.info("Checker for %(name)s failed",
623
vars(self))
1064
logger.info("Checker for %(name)s failed", vars(self))
624
1065
else:
625
1066
self.last_checker_status = -1
1067
self.last_checker_signal = -returncode
626
1068
logger.warning("Checker for %(name)s crashed?",
627
1069
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
"""
1070
return False
1071
1072
def checked_ok(self):
1073
"""Assert that the client has been seen, alive and well."""
1074
self.last_checked_ok = datetime.datetime.utcnow()
1075
self.last_checker_status = 0
1076
self.last_checker_signal = None
1077
self.bump_timeout()
1078
1079
def bump_timeout(self, timeout=None):
1080
"""Bump up the timeout for this client."""
635
1081
if timeout is None:
636
1082
timeout = self.timeout
637
self.last_checked_ok = datetime.datetime.utcnow()
638
1083
if self.disable_initiator_tag is not None:
639
gobject.source_remove(self.disable_initiator_tag)
1084
GLib.source_remove(self.disable_initiator_tag)
1085
self.disable_initiator_tag = None
640
1086
if getattr(self, "enabled", False):
641
self.disable_initiator_tag = (gobject.timeout_add
642
(timedelta_to_milliseconds
643
(timeout), self.disable))
1087
self.disable_initiator_tag = GLib.timeout_add(
1088
int(timeout.total_seconds() * 1000), self.disable)
644
1089
self.expires = datetime.datetime.utcnow() + timeout
645
1090
646
1091
def need_approval(self):
647
1092
self.last_approval_request = datetime.datetime.utcnow()
648
1093
649
1094
def start_checker(self):
650
1095
"""Start a new checker subprocess if one is not running.
651
1096
652
1097
If a checker already exists, leave it running and do
653
1098
nothing."""
654
1099
# 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
1100
# did that, and if a checker (for some reason) started running
1101
# slowly and taking more than 'interval' time, then the client
1102
# would inevitably timeout, since no checker would get a
1103
# chance to run to completion. If we instead leave running
659
1104
# checkers alone, the checker would have to take more time
660
1105
# than 'timeout' for the client to be disabled, which is as it
661
1106
# 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)
1107
1108
if self.checker is not None and not self.checker.is_alive():
1109
logger.warning("Checker was not alive; joining")
1110
self.checker.join()
1111
self.checker = None
676
1112
# Start a new checker if needed
677
1113
if self.checker is None:
1114
# Escape attributes for the shell
1115
escaped_attrs = {
1116
attr: re.escape(str(getattr(self, attr)))
1117
for attr in self.runtime_expansions}
678
1118
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
1119
command = self.checker_command % escaped_attrs
1120
except TypeError as error:
1121
logger.error('Could not format string "%s"',
1122
self.checker_command,
1123
exc_info=error)
1124
return True # Try again later
697
1125
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
1126
logger.info("Starting checker %r for %s", command,
1127
self.name)
1128
# We don't need to redirect stdout and stderr, since
1129
# in normal mode, that is already done by daemon(),
1130
# and in debug mode we don't want to. (Stdin is
1131
# always replaced by /dev/null.)
1132
# The exception is when not debugging but nevertheless
1133
# running in the foreground; use the previously
1134
# created wnull.
1135
popen_args = {"close_fds": True,
1136
"shell": True,
1137
"cwd": "/"}
1138
if (not self.server_settings["debug"]
1139
and self.server_settings["foreground"]):
1140
popen_args.update({"stdout": wnull,
1141
"stderr": wnull})
1142
pipe = multiprocessing.Pipe(duplex=False)
1143
self.checker = multiprocessing.Process(
1144
target=call_pipe,
1145
args=(pipe[1], subprocess.call, command),
1146
kwargs=popen_args)
1147
self.checker.start()
1148
self.checker_callback_tag = GLib.io_add_watch(
1149
pipe[0].fileno(), GLib.IO_IN,
1150
self.checker_callback, pipe[0], command)
1151
# Re-run this periodically if run by GLib.timeout_add
722
1152
return True
723
1153
724
1154
def stop_checker(self):
725
1155
"""Force the checker process, if any, to stop."""
726
1156
if self.checker_callback_tag:
727
gobject.source_remove(self.checker_callback_tag)
1157
GLib.source_remove(self.checker_callback_tag)
728
1158
self.checker_callback_tag = None
729
1159
if getattr(self, "checker", None) is None:
730
1160
return
731
1161
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
1162
self.checker.terminate()
740
1163
self.checker = None
741
1164
742
1165
743
def dbus_service_property(dbus_interface, signature="v",
744
access="readwrite", byte_arrays=False):
1166
def dbus_service_property(dbus_interface,
1167
signature="v",
1168
access="readwrite",
1169
byte_arrays=False):
745
1170
"""Decorators for marking methods of a DBusObjectWithProperties to
746
1171
become properties on the D-Bus.
747
1172
748
1173
The decorated method will be called with no arguments by "Get"
749
1174
and with one argument by "Set".
750
1175
751
1176
The parameters, where they are supported, are the same as
752
1177
dbus.service.method, except there is only "signature", since the
753
1178
type from Get() and the type sent to Set() is the same.
756
1181
# "Set" method, so we fail early here:
757
1182
if byte_arrays and signature != "ay":
758
1183
raise ValueError("Byte arrays not supported for non-'ay'"
759
" signature %r" % signature)
1184
" signature {!r}".format(signature))
1185
760
1186
def decorator(func):
761
1187
func._dbus_is_property = True
762
1188
func._dbus_interface = dbus_interface
765
1191
func._dbus_name = func.__name__
766
1192
if func._dbus_name.endswith("_dbus_property"):
767
1193
func._dbus_name = func._dbus_name[:-14]
768
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
769
return func
1194
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1195
return func
1196
1197
return decorator
1198
1199
1200
def dbus_interface_annotations(dbus_interface):
1201
"""Decorator for marking functions returning interface annotations
1202
1203
Usage:
1204
1205
@dbus_interface_annotations("org.example.Interface")
1206
def _foo(self): # Function name does not matter
1207
return {"org.freedesktop.DBus.Deprecated": "true",
1208
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1209
"false"}
1210
"""
1211
1212
def decorator(func):
1213
func._dbus_is_interface = True
1214
func._dbus_interface = dbus_interface
1215
func._dbus_name = dbus_interface
1216
return func
1217
1218
return decorator
1219
1220
1221
def dbus_annotations(annotations):
1222
"""Decorator to annotate D-Bus methods, signals or properties
1223
Usage:
1224
1225
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1226
"org.freedesktop.DBus.Property."
1227
"EmitsChangedSignal": "false"})
1228
@dbus_service_property("org.example.Interface", signature="b",
1229
access="r")
1230
def Property_dbus_property(self):
1231
return dbus.Boolean(False)
1232
1233
See also the DBusObjectWithAnnotations class.
1234
"""
1235
1236
def decorator(func):
1237
func._dbus_annotations = annotations
1238
return func
1239
770
1240
return decorator
771
1241
772
1242
773
1243
class DBusPropertyException(dbus.exceptions.DBusException):
774
1244
"""A base class for D-Bus property-related exceptions
775
1245
"""
776
def __unicode__(self):
777
return unicode(str(self))
1246
pass
778
1247
779
1248
780
1249
class DBusPropertyAccessException(DBusPropertyException):
789
1258
pass
790
1259
791
1260
792
class DBusObjectWithProperties(dbus.service.Object):
1261
class DBusObjectWithAnnotations(dbus.service.Object):
1262
"""A D-Bus object with annotations.
1263
1264
Classes inheriting from this can use the dbus_annotations
1265
decorator to add annotations to methods or signals.
1266
"""
1267
1268
@staticmethod
1269
def _is_dbus_thing(thing):
1270
"""Returns a function testing if an attribute is a D-Bus thing
1271
1272
If called like _is_dbus_thing("method") it returns a function
1273
suitable for use as predicate to inspect.getmembers().
1274
"""
1275
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1276
False)
1277
1278
def _get_all_dbus_things(self, thing):
1279
"""Returns a generator of (name, attribute) pairs
1280
"""
1281
return ((getattr(athing.__get__(self), "_dbus_name", name),
1282
athing.__get__(self))
1283
for cls in self.__class__.__mro__
1284
for name, athing in
1285
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1286
1287
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1288
out_signature="s",
1289
path_keyword='object_path',
1290
connection_keyword='connection')
1291
def Introspect(self, object_path, connection):
1292
"""Overloading of standard D-Bus method.
1293
1294
Inserts annotation tags on methods and signals.
1295
"""
1296
xmlstring = dbus.service.Object.Introspect(self, object_path,
1297
connection)
1298
try:
1299
document = xml.dom.minidom.parseString(xmlstring)
1300
1301
for if_tag in document.getElementsByTagName("interface"):
1302
# Add annotation tags
1303
for typ in ("method", "signal"):
1304
for tag in if_tag.getElementsByTagName(typ):
1305
annots = dict()
1306
for name, prop in (self.
1307
_get_all_dbus_things(typ)):
1308
if (name == tag.getAttribute("name")
1309
and prop._dbus_interface
1310
== if_tag.getAttribute("name")):
1311
annots.update(getattr(
1312
prop, "_dbus_annotations", {}))
1313
for name, value in annots.items():
1314
ann_tag = document.createElement(
1315
"annotation")
1316
ann_tag.setAttribute("name", name)
1317
ann_tag.setAttribute("value", value)
1318
tag.appendChild(ann_tag)
1319
# Add interface annotation tags
1320
for annotation, value in dict(
1321
itertools.chain.from_iterable(
1322
annotations().items()
1323
for name, annotations
1324
in self._get_all_dbus_things("interface")
1325
if name == if_tag.getAttribute("name")
1326
)).items():
1327
ann_tag = document.createElement("annotation")
1328
ann_tag.setAttribute("name", annotation)
1329
ann_tag.setAttribute("value", value)
1330
if_tag.appendChild(ann_tag)
1331
# Fix argument name for the Introspect method itself
1332
if (if_tag.getAttribute("name")
1333
== dbus.INTROSPECTABLE_IFACE):
1334
for cn in if_tag.getElementsByTagName("method"):
1335
if cn.getAttribute("name") == "Introspect":
1336
for arg in cn.getElementsByTagName("arg"):
1337
if (arg.getAttribute("direction")
1338
== "out"):
1339
arg.setAttribute("name",
1340
"xml_data")
1341
xmlstring = document.toxml("utf-8")
1342
document.unlink()
1343
except (AttributeError, xml.dom.DOMException,
1344
xml.parsers.expat.ExpatError) as error:
1345
logger.error("Failed to override Introspection method",
1346
exc_info=error)
1347
return xmlstring
1348
1349
1350
class DBusObjectWithProperties(DBusObjectWithAnnotations):
793
1351
"""A D-Bus object with properties.
794
1352
795
1353
Classes inheriting from this can use the dbus_service_property
796
1354
decorator to expose methods as D-Bus properties. It exposes the
797
1355
standard Get(), Set(), and GetAll() methods on the D-Bus.
798
1356
"""
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
1357
812
1358
def _get_dbus_property(self, interface_name, property_name):
813
1359
"""Returns a bound method if one exists which is a D-Bus
814
1360
property with the specified name and interface.
815
1361
"""
816
for cls in self.__class__.__mro__:
817
for name, value in (inspect.getmembers
818
(cls, self._is_dbus_property)):
1362
for cls in self.__class__.__mro__:
1363
for name, value in inspect.getmembers(
1364
cls, self._is_dbus_thing("property")):
819
1365
if (value._dbus_name == property_name
820
1366
and value._dbus_interface == interface_name):
821
1367
return value.__get__(self)
822
1368
823
1369
# 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",
1370
raise DBusPropertyNotFound("{}:{}.{}".format(
1371
self.dbus_object_path, interface_name, property_name))
1372
1373
@classmethod
1374
def _get_all_interface_names(cls):
1375
"""Get a sequence of all interfaces supported by an object"""
1376
return (name for name in set(getattr(getattr(x, attr),
1377
"_dbus_interface", None)
1378
for x in (inspect.getmro(cls))
1379
for attr in dir(x))
1380
if name is not None)
1381
1382
@dbus.service.method(dbus.PROPERTIES_IFACE,
1383
in_signature="ss",
829
1384
out_signature="v")
830
1385
def Get(self, interface_name, property_name):
831
1386
"""Standard D-Bus property Get() method, see D-Bus standard.
837
1392
if not hasattr(value, "variant_level"):
838
1393
return value
839
1394
return type(value)(value, variant_level=value.variant_level+1)
840
1395
841
1396
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
842
1397
def Set(self, interface_name, property_name, value):
843
1398
"""Standard D-Bus property Set() method, see D-Bus standard.
849
1404
# The byte_arrays option is not supported yet on
850
1405
# signatures other than "ay".
851
1406
if prop._dbus_signature != "ay":
852
raise ValueError
1407
raise ValueError("Byte arrays not supported for non-"
1408
"'ay' signature {!r}"
1409
.format(prop._dbus_signature))
853
1410
value = dbus.ByteArray(b''.join(chr(byte)
854
1411
for byte in value))
855
1412
prop(value)
856
857
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1413
1414
@dbus.service.method(dbus.PROPERTIES_IFACE,
1415
in_signature="s",
858
1416
out_signature="a{sv}")
859
1417
def GetAll(self, interface_name):
860
1418
"""Standard D-Bus property GetAll() method, see D-Bus
861
1419
standard.
862
1420
863
1421
Note: Will not include properties with access="write".
864
1422
"""
865
1423
properties = {}
866
for name, prop in self._get_all_dbus_properties():
1424
for name, prop in self._get_all_dbus_things("property"):
867
1425
if (interface_name
868
1426
and interface_name != prop._dbus_interface):
869
1427
# Interface non-empty but did not match
875
1433
if not hasattr(value, "variant_level"):
876
1434
properties[name] = value
877
1435
continue
878
properties[name] = type(value)(value, variant_level=
879
value.variant_level+1)
1436
properties[name] = type(value)(
1437
value, variant_level=value.variant_level + 1)
880
1438
return dbus.Dictionary(properties, signature="sv")
881
1439
1440
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1441
def PropertiesChanged(self, interface_name, changed_properties,
1442
invalidated_properties):
1443
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1444
standard.
1445
"""
1446
pass
1447
882
1448
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
883
1449
out_signature="s",
884
1450
path_keyword='object_path',
885
1451
connection_keyword='connection')
886
1452
def Introspect(self, object_path, connection):
887
"""Standard D-Bus method, overloaded to insert property tags.
1453
"""Overloading of standard D-Bus method.
1454
1455
Inserts property tags and interface annotation tags.
888
1456
"""
889
xmlstring = dbus.service.Object.Introspect(self, object_path,
890
connection)
1457
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1458
object_path,
1459
connection)
891
1460
try:
892
1461
document = xml.dom.minidom.parseString(xmlstring)
1462
893
1463
def make_tag(document, name, prop):
894
1464
e = document.createElement("property")
895
1465
e.setAttribute("name", name)
896
1466
e.setAttribute("type", prop._dbus_signature)
897
1467
e.setAttribute("access", prop._dbus_access)
898
1468
return e
1469
899
1470
for if_tag in document.getElementsByTagName("interface"):
1471
# Add property tags
900
1472
for tag in (make_tag(document, name, prop)
901
1473
for name, prop
902
in self._get_all_dbus_properties()
1474
in self._get_all_dbus_things("property")
903
1475
if prop._dbus_interface
904
1476
== if_tag.getAttribute("name")):
905
1477
if_tag.appendChild(tag)
1478
# Add annotation tags for properties
1479
for tag in if_tag.getElementsByTagName("property"):
1480
annots = dict()
1481
for name, prop in self._get_all_dbus_things(
1482
"property"):
1483
if (name == tag.getAttribute("name")
1484
and prop._dbus_interface
1485
== if_tag.getAttribute("name")):
1486
annots.update(getattr(
1487
prop, "_dbus_annotations", {}))
1488
for name, value in annots.items():
1489
ann_tag = document.createElement(
1490
"annotation")
1491
ann_tag.setAttribute("name", name)
1492
ann_tag.setAttribute("value", value)
1493
tag.appendChild(ann_tag)
906
1494
# Add the names to the return values for the
907
1495
# "org.freedesktop.DBus.Properties" methods
908
1496
if (if_tag.getAttribute("name")
923
1511
except (AttributeError, xml.dom.DOMException,
924
1512
xml.parsers.expat.ExpatError) as error:
925
1513
logger.error("Failed to override Introspection method",
926
error)
927
return xmlstring
928
929
930
def datetime_to_dbus (dt, variant_level=0):
1514
exc_info=error)
1515
return xmlstring
1516
1517
1518
try:
1519
dbus.OBJECT_MANAGER_IFACE
1520
except AttributeError:
1521
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1522
1523
1524
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1525
"""A D-Bus object with an ObjectManager.
1526
1527
Classes inheriting from this exposes the standard
1528
GetManagedObjects call and the InterfacesAdded and
1529
InterfacesRemoved signals on the standard
1530
"org.freedesktop.DBus.ObjectManager" interface.
1531
1532
Note: No signals are sent automatically; they must be sent
1533
manually.
1534
"""
1535
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1536
out_signature="a{oa{sa{sv}}}")
1537
def GetManagedObjects(self):
1538
"""This function must be overridden"""
1539
raise NotImplementedError()
1540
1541
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1542
signature="oa{sa{sv}}")
1543
def InterfacesAdded(self, object_path, interfaces_and_properties):
1544
pass
1545
1546
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1547
def InterfacesRemoved(self, object_path, interfaces):
1548
pass
1549
1550
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1551
out_signature="s",
1552
path_keyword='object_path',
1553
connection_keyword='connection')
1554
def Introspect(self, object_path, connection):
1555
"""Overloading of standard D-Bus method.
1556
1557
Override return argument name of GetManagedObjects to be
1558
"objpath_interfaces_and_properties"
1559
"""
1560
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1561
object_path,
1562
connection)
1563
try:
1564
document = xml.dom.minidom.parseString(xmlstring)
1565
1566
for if_tag in document.getElementsByTagName("interface"):
1567
# Fix argument name for the GetManagedObjects method
1568
if (if_tag.getAttribute("name")
1569
== dbus.OBJECT_MANAGER_IFACE):
1570
for cn in if_tag.getElementsByTagName("method"):
1571
if (cn.getAttribute("name")
1572
== "GetManagedObjects"):
1573
for arg in cn.getElementsByTagName("arg"):
1574
if (arg.getAttribute("direction")
1575
== "out"):
1576
arg.setAttribute(
1577
"name",
1578
"objpath_interfaces"
1579
"_and_properties")
1580
xmlstring = document.toxml("utf-8")
1581
document.unlink()
1582
except (AttributeError, xml.dom.DOMException,
1583
xml.parsers.expat.ExpatError) as error:
1584
logger.error("Failed to override Introspection method",
1585
exc_info=error)
1586
return xmlstring
1587
1588
1589
def datetime_to_dbus(dt, variant_level=0):
931
1590
"""Convert a UTC datetime.datetime() to a D-Bus type."""
932
1591
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.
1592
return dbus.String("", variant_level=variant_level)
1593
return dbus.String(dt.isoformat(), variant_level=variant_level)
1594
1595
1596
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1597
"""A class decorator; applied to a subclass of
1598
dbus.service.Object, it will add alternate D-Bus attributes with
1599
interface names according to the "alt_interface_names" mapping.
1600
Usage:
1601
1602
@alternate_dbus_interfaces({"org.example.Interface":
1603
"net.example.AlternateInterface"})
1604
class SampleDBusObject(dbus.service.Object):
1605
@dbus.service.method("org.example.Interface")
1606
def SampleDBusMethod():
1607
pass
1608
1609
The above "SampleDBusMethod" on "SampleDBusObject" will be
1610
reachable via two interfaces: "org.example.Interface" and
1611
"net.example.AlternateInterface", the latter of which will have
1612
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1613
"true", unless "deprecate" is passed with a False value.
1614
1615
This works for methods and signals, and also for D-Bus properties
1616
(from DBusObjectWithProperties) and interfaces (from the
1617
dbus_interface_annotations decorator).
942
1618
"""
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):
1619
1620
def wrapper(cls):
1621
for orig_interface_name, alt_interface_name in (
1622
alt_interface_names.items()):
1623
attr = {}
1624
interface_names = set()
1625
# Go though all attributes of the class
1626
for attrname, attribute in inspect.getmembers(cls):
950
1627
# Ignore non-D-Bus attributes, and D-Bus attributes
951
1628
# with the wrong interface name
952
1629
if (not hasattr(attribute, "_dbus_interface")
953
or not attribute._dbus_interface
954
.startswith("se.recompile.Mandos")):
1630
or not attribute._dbus_interface.startswith(
1631
orig_interface_name)):
955
1632
continue
956
1633
# Create an alternate D-Bus interface name based on
957
1634
# the current name
958
alt_interface = (attribute._dbus_interface
959
.replace("se.recompile.Mandos",
960
"se.bsnet.fukt.Mandos"))
1635
alt_interface = attribute._dbus_interface.replace(
1636
orig_interface_name, alt_interface_name)
1637
interface_names.add(alt_interface)
961
1638
# Is this a D-Bus signal?
962
1639
if getattr(attribute, "_dbus_is_signal", False):
963
# Extract the original non-method function by
964
# black magic
965
nonmethod_func = (dict(
1640
# Extract the original non-method undecorated
1641
# function by black magic
1642
if sys.version_info.major == 2:
1643
nonmethod_func = (dict(
966
1644
zip(attribute.func_code.co_freevars,
967
attribute.__closure__))["func"]
968
.cell_contents)
1645
attribute.__closure__))
1646
["func"].cell_contents)
1647
else:
1648
nonmethod_func = (dict(
1649
zip(attribute.__code__.co_freevars,
1650
attribute.__closure__))
1651
["func"].cell_contents)
969
1652
# Create a new, but exactly alike, function
970
1653
# object, and decorate it to be a new D-Bus signal
971
1654
# 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)))
1655
new_function = copy_function(nonmethod_func)
1656
new_function = (dbus.service.signal(
1657
alt_interface,
1658
attribute._dbus_signature)(new_function))
1659
# Copy annotations, if any
1660
try:
1661
new_function._dbus_annotations = dict(
1662
attribute._dbus_annotations)
1663
except AttributeError:
1664
pass
1665
981
1666
# 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
1667
# original and alternate functions, so both the
1668
# original and alternate signals gets sent when
1669
# the function is called
984
1670
def fixscope(func1, func2):
985
1671
"""This function is a scope container to pass
986
1672
func1 and func2 to the "call_both" function
987
1673
outside of its arguments"""
1674
1675
@functools.wraps(func2)
988
1676
def call_both(*args, **kwargs):
989
1677
"""This function will emit two D-Bus
990
1678
signals by calling func1 and func2"""
991
1679
func1(*args, **kwargs)
992
1680
func2(*args, **kwargs)
1681
# Make wrapper function look like a D-Bus
1682
# signal
1683
for name, attr in inspect.getmembers(func2):
1684
if name.startswith("_dbus_"):
1685
setattr(call_both, name, attr)
1686
993
1687
return call_both
994
1688
# Create the "call_both" function and add it to
995
1689
# the class
996
attr[attrname] = fixscope(attribute,
997
new_function)
1690
attr[attrname] = fixscope(attribute, new_function)
998
1691
# Is this a D-Bus method?
999
1692
elif getattr(attribute, "_dbus_is_method", False):
1000
1693
# Create a new, but exactly alike, function
1001
1694
# object. Decorate it to be a new D-Bus method
1002
1695
# with the alternate D-Bus interface name. Add it
1003
1696
# 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)))
1697
attr[attrname] = (
1698
dbus.service.method(
1699
alt_interface,
1700
attribute._dbus_in_signature,
1701
attribute._dbus_out_signature)
1702
(copy_function(attribute)))
1703
# Copy annotations, if any
1704
try:
1705
attr[attrname]._dbus_annotations = dict(
1706
attribute._dbus_annotations)
1707
except AttributeError:
1708
pass
1014
1709
# Is this a D-Bus property?
1015
1710
elif getattr(attribute, "_dbus_is_property", False):
1016
1711
# Create a new, but exactly alike, function
1017
1712
# object, and decorate it to be a new D-Bus
1018
1713
# property with the alternate D-Bus interface
1019
1714
# 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
1715
attr[attrname] = (dbus_service_property(
1716
alt_interface, attribute._dbus_signature,
1717
attribute._dbus_access,
1718
attribute._dbus_get_args_options
1719
["byte_arrays"])
1720
(copy_function(attribute)))
1721
# Copy annotations, if any
1722
try:
1723
attr[attrname]._dbus_annotations = dict(
1724
attribute._dbus_annotations)
1725
except AttributeError:
1726
pass
1727
# Is this a D-Bus interface?
1728
elif getattr(attribute, "_dbus_is_interface", False):
1729
# Create a new, but exactly alike, function
1730
# object. Decorate it to be a new D-Bus interface
1731
# with the alternate D-Bus interface name. Add it
1732
# to the class.
1733
attr[attrname] = (
1734
dbus_interface_annotations(alt_interface)
1735
(copy_function(attribute)))
1736
if deprecate:
1737
# Deprecate all alternate interfaces
1738
iname = "_AlternateDBusNames_interface_annotation{}"
1739
for interface_name in interface_names:
1740
1741
@dbus_interface_annotations(interface_name)
1742
def func(self):
1743
return {"org.freedesktop.DBus.Deprecated":
1744
"true"}
1745
# Find an unused name
1746
for aname in (iname.format(i)
1747
for i in itertools.count()):
1748
if aname not in attr:
1749
attr[aname] = func
1750
break
1751
if interface_names:
1752
# Replace the class with a new subclass of it with
1753
# methods, signals, etc. as created above.
1754
if sys.version_info.major == 2:
1755
cls = type(b"{}Alternate".format(cls.__name__),
1756
(cls, ), attr)
1757
else:
1758
cls = type("{}Alternate".format(cls.__name__),
1759
(cls, ), attr)
1760
return cls
1761
1762
return wrapper
1763
1764
1765
@alternate_dbus_interfaces({"se.recompile.Mandos":
1766
"se.bsnet.fukt.Mandos"})
1036
1767
class ClientDBus(Client, DBusObjectWithProperties):
1037
1768
"""A Client class using D-Bus
1038
1769
1039
1770
Attributes:
1040
1771
dbus_object_path: dbus.ObjectPath
1041
1772
bus: dbus.SystemBus()
1042
1773
"""
1043
1774
1044
1775
runtime_expansions = (Client.runtime_expansions
1045
+ ("dbus_object_path",))
1046
1776
+ ("dbus_object_path", ))
1777
1778
_interface = "se.recompile.Mandos.Client"
1779
1047
1780
# dbus.service.Object doesn't use super(), so we can't either.
1048
1049
def __init__(self, bus = None, *args, **kwargs):
1781
1782
def __init__(self, bus=None, *args, **kwargs):
1050
1783
self.bus = bus
1051
1784
Client.__init__(self, *args, **kwargs)
1052
self._approvals_pending = 0
1053
1054
self._approvals_pending = 0
1055
1785
# Only now, when this client is initialized, can it show up on
1056
1786
# the D-Bus
1057
client_object_name = unicode(self.name).translate(
1787
client_object_name = str(self.name).translate(
1058
1788
{ord("."): ord("_"),
1059
1789
ord("-"): ord("_")})
1060
self.dbus_object_path = (dbus.ObjectPath
1061
("/clients/" + client_object_name))
1790
self.dbus_object_path = dbus.ObjectPath(
1791
"/clients/" + client_object_name)
1062
1792
DBusObjectWithProperties.__init__(self, self.bus,
1063
1793
self.dbus_object_path)
1064
1065
def notifychangeproperty(transform_func,
1066
dbus_name, type_func=lambda x: x,
1067
variant_level=1):
1794
1795
def notifychangeproperty(transform_func, dbus_name,
1796
type_func=lambda x: x,
1797
variant_level=1,
1798
invalidate_only=False,
1799
_interface=_interface):
1068
1800
""" Modify a variable so that it's a property which announces
1069
1801
its changes to DBus.
1070
1802
1071
1803
transform_fun: Function that takes a value and a variant_level
1072
1804
and transforms it to a D-Bus type.
1073
1805
dbus_name: D-Bus name of the variable
1075
1807
to the D-Bus. Default: no transform
1076
1808
variant_level: D-Bus variant level. Default: 1
1077
1809
"""
1078
attrname = "_{0}".format(dbus_name)
1810
attrname = "_{}".format(dbus_name)
1811
1079
1812
def setter(self, value):
1080
1813
if hasattr(self, "dbus_object_path"):
1081
1814
if (not hasattr(self, attrname) or
1082
1815
type_func(getattr(self, attrname, None))
1083
1816
!= type_func(value)):
1084
dbus_value = transform_func(type_func(value),
1085
variant_level
1086
=variant_level)
1087
self.PropertyChanged(dbus.String(dbus_name),
1088
dbus_value)
1817
if invalidate_only:
1818
self.PropertiesChanged(
1819
_interface, dbus.Dictionary(),
1820
dbus.Array((dbus_name, )))
1821
else:
1822
dbus_value = transform_func(
1823
type_func(value),
1824
variant_level=variant_level)
1825
self.PropertyChanged(dbus.String(dbus_name),
1826
dbus_value)
1827
self.PropertiesChanged(
1828
_interface,
1829
dbus.Dictionary({dbus.String(dbus_name):
1830
dbus_value}),
1831
dbus.Array())
1089
1832
setattr(self, attrname, value)
1090
1833
1091
1834
return property(lambda self: getattr(self, attrname), setter)
1092
1093
1835
1094
1836
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1095
1837
approvals_pending = notifychangeproperty(dbus.Boolean,
1096
1838
"ApprovalPending",
1097
type_func = bool)
1839
type_func=bool)
1098
1840
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1099
1841
last_enabled = notifychangeproperty(datetime_to_dbus,
1100
1842
"LastEnabled")
1101
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1102
type_func = lambda checker:
1103
checker is not None)
1843
checker = notifychangeproperty(
1844
dbus.Boolean, "CheckerRunning",
1845
type_func=lambda checker: checker is not None)
1104
1846
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1105
1847
"LastCheckedOK")
1848
last_checker_status = notifychangeproperty(dbus.Int16,
1849
"LastCheckerStatus")
1106
1850
last_approval_request = notifychangeproperty(
1107
1851
datetime_to_dbus, "LastApprovalRequest")
1108
1852
approved_by_default = notifychangeproperty(dbus.Boolean,
1109
1853
"ApprovedByDefault")
1110
approval_delay = notifychangeproperty(dbus.UInt64,
1111
"ApprovalDelay",
1112
type_func =
1113
timedelta_to_milliseconds)
1854
approval_delay = notifychangeproperty(
1855
dbus.UInt64, "ApprovalDelay",
1856
type_func=lambda td: td.total_seconds() * 1000)
1114
1857
approval_duration = notifychangeproperty(
1115
1858
dbus.UInt64, "ApprovalDuration",
1116
type_func = timedelta_to_milliseconds)
1859
type_func=lambda td: td.total_seconds() * 1000)
1117
1860
host = notifychangeproperty(dbus.String, "Host")
1118
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1119
type_func =
1120
timedelta_to_milliseconds)
1861
timeout = notifychangeproperty(
1862
dbus.UInt64, "Timeout",
1863
type_func=lambda td: td.total_seconds() * 1000)
1121
1864
extended_timeout = notifychangeproperty(
1122
1865
dbus.UInt64, "ExtendedTimeout",
1123
type_func = timedelta_to_milliseconds)
1124
interval = notifychangeproperty(dbus.UInt64,
1125
"Interval",
1126
type_func =
1127
timedelta_to_milliseconds)
1866
type_func=lambda td: td.total_seconds() * 1000)
1867
interval = notifychangeproperty(
1868
dbus.UInt64, "Interval",
1869
type_func=lambda td: td.total_seconds() * 1000)
1128
1870
checker_command = notifychangeproperty(dbus.String, "Checker")
1129
1871
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1872
invalidate_only=True)
1873
1130
1874
del notifychangeproperty
1131
1875
1132
1876
def __del__(self, *args, **kwargs):
1133
1877
try:
1134
1878
self.remove_from_connection()
1137
1881
if hasattr(DBusObjectWithProperties, "__del__"):
1138
1882
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1139
1883
Client.__del__(self, *args, **kwargs)
1140
1141
def checker_callback(self, pid, condition, command,
1142
*args, **kwargs):
1143
self.checker_callback_tag = None
1144
self.checker = None
1145
if os.WIFEXITED(condition):
1146
exitstatus = os.WEXITSTATUS(condition)
1884
1885
def checker_callback(self, source, condition,
1886
connection, command, *args, **kwargs):
1887
ret = Client.checker_callback(self, source, condition,
1888
connection, command, *args,
1889
**kwargs)
1890
exitstatus = self.last_checker_status
1891
if exitstatus >= 0:
1147
1892
# Emit D-Bus signal
1148
1893
self.CheckerCompleted(dbus.Int16(exitstatus),
1149
dbus.Int64(condition),
1894
# This is specific to GNU libC
1895
dbus.Int64(exitstatus << 8),
1150
1896
dbus.String(command))
1151
1897
else:
1152
1898
# Emit D-Bus signal
1153
1899
self.CheckerCompleted(dbus.Int16(-1),
1154
dbus.Int64(condition),
1900
dbus.Int64(
1901
# This is specific to GNU libC
1902
(exitstatus << 8)
1903
| self.last_checker_signal),
1155
1904
dbus.String(command))
1156
1157
return Client.checker_callback(self, pid, condition, command,
1158
*args, **kwargs)
1159
1905
return ret
1906
1160
1907
def start_checker(self, *args, **kwargs):
1161
old_checker = self.checker
1162
if self.checker is not None:
1163
old_checker_pid = self.checker.pid
1164
else:
1165
old_checker_pid = None
1908
old_checker_pid = getattr(self.checker, "pid", None)
1166
1909
r = Client.start_checker(self, *args, **kwargs)
1167
1910
# Only if new checker process was started
1168
1911
if (self.checker is not None
1170
1913
# Emit D-Bus signal
1171
1914
self.CheckerStarted(self.current_checker_command)
1172
1915
return r
1173
1916
1174
1917
def _reset_approved(self):
1175
1918
self.approved = None
1176
1919
return False
1177
1920
1178
1921
def approve(self, value=True):
1179
self.send_changedstate()
1180
1922
self.approved = value
1181
gobject.timeout_add(timedelta_to_milliseconds
1182
(self.approval_duration),
1183
self._reset_approved)
1184
1185
1186
## D-Bus methods, signals & properties
1187
_interface = "se.recompile.Mandos.Client"
1188
1189
## Signals
1190
1923
GLib.timeout_add(int(self.approval_duration.total_seconds()
1924
* 1000), self._reset_approved)
1925
self.send_changedstate()
1926
1927
# D-Bus methods, signals & properties
1928
1929
# Interfaces
1930
1931
# Signals
1932
1191
1933
# CheckerCompleted - signal
1192
1934
@dbus.service.signal(_interface, signature="nxs")
1193
1935
def CheckerCompleted(self, exitcode, waitstatus, command):
1194
1936
"D-Bus signal"
1195
1937
pass
1196
1938
1197
1939
# CheckerStarted - signal
1198
1940
@dbus.service.signal(_interface, signature="s")
1199
1941
def CheckerStarted(self, command):
1200
1942
"D-Bus signal"
1201
1943
pass
1202
1944
1203
1945
# PropertyChanged - signal
1946
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1204
1947
@dbus.service.signal(_interface, signature="sv")
1205
1948
def PropertyChanged(self, property, value):
1206
1949
"D-Bus signal"
1207
1950
pass
1208
1951
1209
1952
# GotSecret - signal
1210
1953
@dbus.service.signal(_interface)
1211
1954
def GotSecret(self):
1214
1957
server to mandos-client
1215
1958
"""
1216
1959
pass
1217
1960
1218
1961
# Rejected - signal
1219
1962
@dbus.service.signal(_interface, signature="s")
1220
1963
def Rejected(self, reason):
1221
1964
"D-Bus signal"
1222
1965
pass
1223
1966
1224
1967
# NeedApproval - signal
1225
1968
@dbus.service.signal(_interface, signature="tb")
1226
1969
def NeedApproval(self, timeout, default):
1227
1970
"D-Bus signal"
1228
1971
return self.need_approval()
1229
1230
# NeRwequest - signal
1231
@dbus.service.signal(_interface, signature="s")
1232
def NewRequest(self, ip):
1233
"""D-Bus signal
1234
Is sent after a client request a password.
1235
"""
1236
pass
1237
1238
## Methods
1239
1972
1973
# Methods
1974
1240
1975
# Approve - method
1241
1976
@dbus.service.method(_interface, in_signature="b")
1242
1977
def Approve(self, value):
1243
1978
self.approve(value)
1244
1979
1245
1980
# CheckedOK - method
1246
1981
@dbus.service.method(_interface)
1247
1982
def CheckedOK(self):
1248
1983
self.checked_ok()
1249
1984
1250
1985
# Enable - method
1986
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1251
1987
@dbus.service.method(_interface)
1252
1988
def Enable(self):
1253
1989
"D-Bus method"
1254
1990
self.enable()
1255
1991
1256
1992
# StartChecker - method
1993
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1257
1994
@dbus.service.method(_interface)
1258
1995
def StartChecker(self):
1259
1996
"D-Bus method"
1260
1997
self.start_checker()
1261
1998
1262
1999
# Disable - method
2000
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1263
2001
@dbus.service.method(_interface)
1264
2002
def Disable(self):
1265
2003
"D-Bus method"
1266
2004
self.disable()
1267
2005
1268
2006
# StopChecker - method
2007
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1269
2008
@dbus.service.method(_interface)
1270
2009
def StopChecker(self):
1271
2010
self.stop_checker()
1272
1273
## Properties
1274
2011
2012
# Properties
2013
1275
2014
# ApprovalPending - property
1276
2015
@dbus_service_property(_interface, signature="b", access="read")
1277
2016
def ApprovalPending_dbus_property(self):
1278
2017
return dbus.Boolean(bool(self.approvals_pending))
1279
2018
1280
2019
# ApprovedByDefault - property
1281
@dbus_service_property(_interface, signature="b",
2020
@dbus_service_property(_interface,
2021
signature="b",
1282
2022
access="readwrite")
1283
2023
def ApprovedByDefault_dbus_property(self, value=None):
1284
2024
if value is None: # get
1285
2025
return dbus.Boolean(self.approved_by_default)
1286
2026
self.approved_by_default = bool(value)
1287
2027
1288
2028
# ApprovalDelay - property
1289
@dbus_service_property(_interface, signature="t",
2029
@dbus_service_property(_interface,
2030
signature="t",
1290
2031
access="readwrite")
1291
2032
def ApprovalDelay_dbus_property(self, value=None):
1292
2033
if value is None: # get
1293
return dbus.UInt64(self.approval_delay_milliseconds())
2034
return dbus.UInt64(self.approval_delay.total_seconds()
2035
* 1000)
1294
2036
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1295
2037
1296
2038
# ApprovalDuration - property
1297
@dbus_service_property(_interface, signature="t",
2039
@dbus_service_property(_interface,
2040
signature="t",
1298
2041
access="readwrite")
1299
2042
def ApprovalDuration_dbus_property(self, value=None):
1300
2043
if value is None: # get
1301
return dbus.UInt64(timedelta_to_milliseconds(
1302
self.approval_duration))
2044
return dbus.UInt64(self.approval_duration.total_seconds()
2045
* 1000)
1303
2046
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1304
2047
1305
2048
# Name - property
2049
@dbus_annotations(
2050
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1306
2051
@dbus_service_property(_interface, signature="s", access="read")
1307
2052
def Name_dbus_property(self):
1308
2053
return dbus.String(self.name)
1309
2054
2055
# KeyID - property
2056
@dbus_annotations(
2057
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2058
@dbus_service_property(_interface, signature="s", access="read")
2059
def KeyID_dbus_property(self):
2060
return dbus.String(self.key_id)
2061
1310
2062
# Fingerprint - property
2063
@dbus_annotations(
2064
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1311
2065
@dbus_service_property(_interface, signature="s", access="read")
1312
2066
def Fingerprint_dbus_property(self):
1313
2067
return dbus.String(self.fingerprint)
1314
2068
1315
2069
# Host - property
1316
@dbus_service_property(_interface, signature="s",
2070
@dbus_service_property(_interface,
2071
signature="s",
1317
2072
access="readwrite")
1318
2073
def Host_dbus_property(self, value=None):
1319
2074
if value is None: # get
1320
2075
return dbus.String(self.host)
1321
self.host = unicode(value)
1322
2076
self.host = str(value)
2077
1323
2078
# Created - property
2079
@dbus_annotations(
2080
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1324
2081
@dbus_service_property(_interface, signature="s", access="read")
1325
2082
def Created_dbus_property(self):
1326
2083
return datetime_to_dbus(self.created)
1327
2084
1328
2085
# LastEnabled - property
1329
2086
@dbus_service_property(_interface, signature="s", access="read")
1330
2087
def LastEnabled_dbus_property(self):
1331
2088
return datetime_to_dbus(self.last_enabled)
1332
2089
1333
2090
# Enabled - property
1334
@dbus_service_property(_interface, signature="b",
2091
@dbus_service_property(_interface,
2092
signature="b",
1335
2093
access="readwrite")
1336
2094
def Enabled_dbus_property(self, value=None):
1337
2095
if value is None: # get
1340
2098
self.enable()
1341
2099
else:
1342
2100
self.disable()
1343
2101
1344
2102
# LastCheckedOK - property
1345
@dbus_service_property(_interface, signature="s",
2103
@dbus_service_property(_interface,
2104
signature="s",
1346
2105
access="readwrite")
1347
2106
def LastCheckedOK_dbus_property(self, value=None):
1348
2107
if value is not None:
1349
2108
self.checked_ok()
1350
2109
return
1351
2110
return datetime_to_dbus(self.last_checked_ok)
1352
2111
2112
# LastCheckerStatus - property
2113
@dbus_service_property(_interface, signature="n", access="read")
2114
def LastCheckerStatus_dbus_property(self):
2115
return dbus.Int16(self.last_checker_status)
2116
1353
2117
# Expires - property
1354
2118
@dbus_service_property(_interface, signature="s", access="read")
1355
2119
def Expires_dbus_property(self):
1356
2120
return datetime_to_dbus(self.expires)
1357
2121
1358
2122
# LastApprovalRequest - property
1359
2123
@dbus_service_property(_interface, signature="s", access="read")
1360
2124
def LastApprovalRequest_dbus_property(self):
1361
2125
return datetime_to_dbus(self.last_approval_request)
1362
2126
1363
2127
# Timeout - property
1364
@dbus_service_property(_interface, signature="t",
2128
@dbus_service_property(_interface,
2129
signature="t",
1365
2130
access="readwrite")
1366
2131
def Timeout_dbus_property(self, value=None):
1367
2132
if value is None: # get
1368
return dbus.UInt64(self.timeout_milliseconds())
2133
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2134
old_timeout = self.timeout
1369
2135
self.timeout = datetime.timedelta(0, 0, 0, value)
1370
# Reschedule timeout
2136
# Reschedule disabling
1371
2137
if self.enabled:
1372
2138
now = datetime.datetime.utcnow()
1373
time_to_die = timedelta_to_milliseconds(
1374
(self.last_checked_ok + self.timeout) - now)
1375
if time_to_die <= 0:
2139
self.expires += self.timeout - old_timeout
2140
if self.expires <= now:
1376
2141
# The timeout has passed
1377
2142
self.disable()
1378
2143
else:
1379
self.expires = (now +
1380
datetime.timedelta(milliseconds =
1381
time_to_die))
1382
2144
if (getattr(self, "disable_initiator_tag", None)
1383
2145
is None):
1384
2146
return
1385
gobject.source_remove(self.disable_initiator_tag)
1386
self.disable_initiator_tag = (gobject.timeout_add
1387
(time_to_die,
1388
self.disable))
1389
2147
GLib.source_remove(self.disable_initiator_tag)
2148
self.disable_initiator_tag = GLib.timeout_add(
2149
int((self.expires - now).total_seconds() * 1000),
2150
self.disable)
2151
1390
2152
# ExtendedTimeout - property
1391
@dbus_service_property(_interface, signature="t",
2153
@dbus_service_property(_interface,
2154
signature="t",
1392
2155
access="readwrite")
1393
2156
def ExtendedTimeout_dbus_property(self, value=None):
1394
2157
if value is None: # get
1395
return dbus.UInt64(self.extended_timeout_milliseconds())
2158
return dbus.UInt64(self.extended_timeout.total_seconds()
2159
* 1000)
1396
2160
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1397
2161
1398
2162
# Interval - property
1399
@dbus_service_property(_interface, signature="t",
2163
@dbus_service_property(_interface,
2164
signature="t",
1400
2165
access="readwrite")
1401
2166
def Interval_dbus_property(self, value=None):
1402
2167
if value is None: # get
1403
return dbus.UInt64(self.interval_milliseconds())
2168
return dbus.UInt64(self.interval.total_seconds() * 1000)
1404
2169
self.interval = datetime.timedelta(0, 0, 0, value)
1405
2170
if getattr(self, "checker_initiator_tag", None) is None:
1406
2171
return
1407
2172
if self.enabled:
1408
2173
# Reschedule checker run
1409
gobject.source_remove(self.checker_initiator_tag)
1410
self.checker_initiator_tag = (gobject.timeout_add
1411
(value, self.start_checker))
1412
self.start_checker() # Start one now, too
1413
2174
GLib.source_remove(self.checker_initiator_tag)
2175
self.checker_initiator_tag = GLib.timeout_add(
2176
value, self.start_checker)
2177
self.start_checker() # Start one now, too
2178
1414
2179
# Checker - property
1415
@dbus_service_property(_interface, signature="s",
2180
@dbus_service_property(_interface,
2181
signature="s",
1416
2182
access="readwrite")
1417
2183
def Checker_dbus_property(self, value=None):
1418
2184
if value is None: # get
1419
2185
return dbus.String(self.checker_command)
1420
self.checker_command = unicode(value)
1421
2186
self.checker_command = str(value)
2187
1422
2188
# CheckerRunning - property
1423
@dbus_service_property(_interface, signature="b",
2189
@dbus_service_property(_interface,
2190
signature="b",
1424
2191
access="readwrite")
1425
2192
def CheckerRunning_dbus_property(self, value=None):
1426
2193
if value is None: # get
1429
2196
self.start_checker()
1430
2197
else:
1431
2198
self.stop_checker()
1432
2199
1433
2200
# ObjectPath - property
2201
@dbus_annotations(
2202
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2203
"org.freedesktop.DBus.Deprecated": "true"})
1434
2204
@dbus_service_property(_interface, signature="o", access="read")
1435
2205
def ObjectPath_dbus_property(self):
1436
return self.dbus_object_path # is already a dbus.ObjectPath
1437
2206
return self.dbus_object_path # is already a dbus.ObjectPath
2207
1438
2208
# Secret = property
1439
@dbus_service_property(_interface, signature="ay",
1440
access="write", byte_arrays=True)
2209
@dbus_annotations(
2210
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2211
"invalidates"})
2212
@dbus_service_property(_interface,
2213
signature="ay",
2214
access="write",
2215
byte_arrays=True)
1441
2216
def Secret_dbus_property(self, value):
1442
self.secret = str(value)
1443
2217
self.secret = bytes(value)
2218
1444
2219
del _interface
1445
2220
1446
2221
1447
2222
class ProxyClient(object):
1448
def __init__(self, child_pipe, fpr, address):
2223
def __init__(self, child_pipe, key_id, fpr, address):
1449
2224
self._pipe = child_pipe
1450
self._pipe.send(('init', fpr, address))
2225
self._pipe.send(('init', key_id, fpr, address))
1451
2226
if not self._pipe.recv():
1452
raise KeyError()
1453
2227
raise KeyError(key_id or fpr)
2228
1454
2229
def __getattribute__(self, name):
1455
2230
if name == '_pipe':
1456
2231
return super(ProxyClient, self).__getattribute__(name)
1459
2234
if data[0] == 'data':
1460
2235
return data[1]
1461
2236
if data[0] == 'function':
2237
1462
2238
def func(*args, **kwargs):
1463
2239
self._pipe.send(('funcall', name, args, kwargs))
1464
2240
return self._pipe.recv()[1]
2241
1465
2242
return func
1466
2243
1467
2244
def __setattr__(self, name, value):
1468
2245
if name == '_pipe':
1469
2246
return super(ProxyClient, self).__setattr__(name, value)
1470
2247
self._pipe.send(('setattr', name, value))
1471
2248
1472
2249
1473
class ClientDBusTransitional(ClientDBus):
1474
__metaclass__ = AlternateDBusNamesMetaclass
1475
1476
1477
2250
class ClientHandler(socketserver.BaseRequestHandler, object):
1478
2251
"""A class to handle client connections.
1479
2252
1480
2253
Instantiated once for each connection to handle it.
1481
2254
Note: This will run in its own forked process."""
1482
2255
1483
2256
def handle(self):
1484
2257
with contextlib.closing(self.server.child_pipe) as child_pipe:
1485
2258
logger.info("TCP connection from: %s",
1486
unicode(self.client_address))
2259
str(self.client_address))
1487
2260
logger.debug("Pipe FD: %d",
1488
2261
self.server.child_pipe.fileno())
1489
1490
session = (gnutls.connection
1491
.ClientSession(self.request,
1492
gnutls.connection
1493
.X509Credentials()))
1494
1495
# Note: gnutls.connection.X509Credentials is really a
1496
# generic GnuTLS certificate credentials object so long as
1497
# no X.509 keys are added to it. Therefore, we can use it
1498
# here despite using OpenPGP certificates.
1499
1500
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1501
# "+AES-256-CBC", "+SHA1",
1502
# "+COMP-NULL", "+CTYPE-OPENPGP",
1503
# "+DHE-DSS"))
2262
2263
session = gnutls.ClientSession(self.request)
2264
2265
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2266
# "+AES-256-CBC", "+SHA1",
2267
# "+COMP-NULL", "+CTYPE-OPENPGP",
2268
# "+DHE-DSS"))
1504
2269
# Use a fallback default, since this MUST be set.
1505
2270
priority = self.server.gnutls_priority
1506
2271
if priority is None:
1507
2272
priority = "NORMAL"
1508
(gnutls.library.functions
1509
.gnutls_priority_set_direct(session._c_object,
1510
priority, None))
1511
2273
gnutls.priority_set_direct(session._c_object,
2274
priority.encode("utf-8"),
2275
None)
2276
1512
2277
# Start communication using the Mandos protocol
1513
2278
# Get protocol number
1514
2279
line = self.request.makefile().readline()
1515
2280
logger.debug("Protocol version: %r", line)
1516
2281
try:
1517
2282
if int(line.strip().split()[0]) > 1:
1518
raise RuntimeError
2283
raise RuntimeError(line)
1519
2284
except (ValueError, IndexError, RuntimeError) as error:
1520
2285
logger.error("Unknown protocol version: %s", error)
1521
2286
return
1522
2287
1523
2288
# Start GnuTLS connection
1524
2289
try:
1525
2290
session.handshake()
1526
except gnutls.errors.GNUTLSError as error:
2291
except gnutls.Error as error:
1527
2292
logger.warning("Handshake failed: %s", error)
1528
2293
# Do not run session.bye() here: the session is not
1529
2294
# established. Just abandon the request.
1530
2295
return
1531
2296
logger.debug("Handshake succeeded")
1532
2297
1533
2298
approval_required = False
1534
2299
try:
1535
try:
1536
fpr = self.fingerprint(self.peer_certificate
1537
(session))
1538
except (TypeError,
1539
gnutls.errors.GNUTLSError) as error:
1540
logger.warning("Bad certificate: %s", error)
1541
return
1542
logger.debug("Fingerprint: %s", fpr)
1543
1544
try:
1545
client = ProxyClient(child_pipe, fpr,
2300
if gnutls.has_rawpk:
2301
fpr = ""
2302
try:
2303
key_id = self.key_id(
2304
self.peer_certificate(session))
2305
except (TypeError, gnutls.Error) as error:
2306
logger.warning("Bad certificate: %s", error)
2307
return
2308
logger.debug("Key ID: %s", key_id)
2309
2310
else:
2311
key_id = ""
2312
try:
2313
fpr = self.fingerprint(
2314
self.peer_certificate(session))
2315
except (TypeError, gnutls.Error) as error:
2316
logger.warning("Bad certificate: %s", error)
2317
return
2318
logger.debug("Fingerprint: %s", fpr)
2319
2320
try:
2321
client = ProxyClient(child_pipe, key_id, fpr,
1546
2322
self.client_address)
1547
2323
except KeyError:
1548
2324
return
1549
1550
if self.server.use_dbus:
1551
# Emit D-Bus signal
1552
client.NewRequest(str(self.client_address))
1553
2325
1554
2326
if client.approval_delay:
1555
2327
delay = client.approval_delay
1556
2328
client.approvals_pending += 1
1557
2329
approval_required = True
1558
2330
1559
2331
while True:
1560
2332
if not client.enabled:
1561
2333
logger.info("Client %s is disabled",
1562
client.name)
2334
client.name)
1563
2335
if self.server.use_dbus:
1564
2336
# Emit D-Bus signal
1565
2337
client.Rejected("Disabled")
1566
2338
return
1567
2339
1568
2340
if client.approved or not client.approval_delay:
1569
#We are approved or approval is disabled
2341
# We are approved or approval is disabled
1570
2342
break
1571
2343
elif client.approved is None:
1572
2344
logger.info("Client %s needs approval",
1574
2346
if self.server.use_dbus:
1575
2347
# Emit D-Bus signal
1576
2348
client.NeedApproval(
1577
client.approval_delay_milliseconds(),
1578
client.approved_by_default)
2349
client.approval_delay.total_seconds()
2350
* 1000, client.approved_by_default)
1579
2351
else:
1580
2352
logger.warning("Client %s was not approved",
1581
2353
client.name)
1583
2355
# Emit D-Bus signal
1584
2356
client.Rejected("Denied")
1585
2357
return
1586
1587
#wait until timeout or approved
2358
2359
# wait until timeout or approved
1588
2360
time = datetime.datetime.now()
1589
2361
client.changedstate.acquire()
1590
(client.changedstate.wait
1591
(float(client.timedelta_to_milliseconds(delay)
1592
/ 1000)))
2362
client.changedstate.wait(delay.total_seconds())
1593
2363
client.changedstate.release()
1594
2364
time2 = datetime.datetime.now()
1595
2365
if (time2 - time) >= delay:
1605
2375
break
1606
2376
else:
1607
2377
delay -= time2 - time
1608
1609
sent_size = 0
1610
while sent_size < len(client.secret):
1611
try:
1612
sent = session.send(client.secret[sent_size:])
1613
except gnutls.errors.GNUTLSError as error:
1614
logger.warning("gnutls send failed")
1615
return
1616
logger.debug("Sent: %d, remaining: %d",
1617
sent, len(client.secret)
1618
- (sent_size + sent))
1619
sent_size += sent
1620
2378
2379
try:
2380
session.send(client.secret)
2381
except gnutls.Error as error:
2382
logger.warning("gnutls send failed",
2383
exc_info=error)
2384
return
2385
1621
2386
logger.info("Sending secret to %s", client.name)
1622
2387
# bump the timeout using extended_timeout
1623
client.checked_ok(client.extended_timeout)
2388
client.bump_timeout(client.extended_timeout)
1624
2389
if self.server.use_dbus:
1625
2390
# Emit D-Bus signal
1626
2391
client.GotSecret()
1627
2392
1628
2393
finally:
1629
2394
if approval_required:
1630
2395
client.approvals_pending -= 1
1631
2396
try:
1632
2397
session.bye()
1633
except gnutls.errors.GNUTLSError as error:
1634
logger.warning("GnuTLS bye failed")
1635
2398
except gnutls.Error as error:
2399
logger.warning("GnuTLS bye failed",
2400
exc_info=error)
2401
1636
2402
@staticmethod
1637
2403
def peer_certificate(session):
1638
"Return the peer's OpenPGP certificate as a bytestring"
1639
# If not an OpenPGP certificate...
1640
if (gnutls.library.functions
1641
.gnutls_certificate_type_get(session._c_object)
1642
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1643
# ...do the normal thing
1644
return session.peer_certificate
2404
"Return the peer's certificate as a bytestring"
2405
try:
2406
cert_type = gnutls.certificate_type_get2(session._c_object,
2407
gnutls.CTYPE_PEERS)
2408
except AttributeError:
2409
cert_type = gnutls.certificate_type_get(session._c_object)
2410
if gnutls.has_rawpk:
2411
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2412
else:
2413
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2414
# If not a valid certificate type...
2415
if cert_type not in valid_cert_types:
2416
logger.info("Cert type %r not in %r", cert_type,
2417
valid_cert_types)
2418
# ...return invalid data
2419
return b""
1645
2420
list_size = ctypes.c_uint(1)
1646
cert_list = (gnutls.library.functions
1647
.gnutls_certificate_get_peers
2421
cert_list = (gnutls.certificate_get_peers
1648
2422
(session._c_object, ctypes.byref(list_size)))
1649
2423
if not bool(cert_list) and list_size.value != 0:
1650
raise gnutls.errors.GNUTLSError("error getting peer"
1651
" certificate")
2424
raise gnutls.Error("error getting peer certificate")
1652
2425
if list_size.value == 0:
1653
2426
return None
1654
2427
cert = cert_list[0]
1655
2428
return ctypes.string_at(cert.data, cert.size)
1656
2429
2430
@staticmethod
2431
def key_id(certificate):
2432
"Convert a certificate bytestring to a hexdigit key ID"
2433
# New GnuTLS "datum" with the public key
2434
datum = gnutls.datum_t(
2435
ctypes.cast(ctypes.c_char_p(certificate),
2436
ctypes.POINTER(ctypes.c_ubyte)),
2437
ctypes.c_uint(len(certificate)))
2438
# XXX all these need to be created in the gnutls "module"
2439
# New empty GnuTLS certificate
2440
pubkey = gnutls.pubkey_t()
2441
gnutls.pubkey_init(ctypes.byref(pubkey))
2442
# Import the raw public key into the certificate
2443
gnutls.pubkey_import(pubkey,
2444
ctypes.byref(datum),
2445
gnutls.X509_FMT_DER)
2446
# New buffer for the key ID
2447
buf = ctypes.create_string_buffer(32)
2448
buf_len = ctypes.c_size_t(len(buf))
2449
# Get the key ID from the raw public key into the buffer
2450
gnutls.pubkey_get_key_id(pubkey,
2451
gnutls.KEYID_USE_SHA256,
2452
ctypes.cast(ctypes.byref(buf),
2453
ctypes.POINTER(ctypes.c_ubyte)),
2454
ctypes.byref(buf_len))
2455
# Deinit the certificate
2456
gnutls.pubkey_deinit(pubkey)
2457
2458
# Convert the buffer to a Python bytestring
2459
key_id = ctypes.string_at(buf, buf_len.value)
2460
# Convert the bytestring to hexadecimal notation
2461
hex_key_id = binascii.hexlify(key_id).upper()
2462
return hex_key_id
2463
1657
2464
@staticmethod
1658
2465
def fingerprint(openpgp):
1659
2466
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1660
2467
# New GnuTLS "datum" with the OpenPGP public key
1661
datum = (gnutls.library.types
1662
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1663
ctypes.POINTER
1664
(ctypes.c_ubyte)),
1665
ctypes.c_uint(len(openpgp))))
2468
datum = gnutls.datum_t(
2469
ctypes.cast(ctypes.c_char_p(openpgp),
2470
ctypes.POINTER(ctypes.c_ubyte)),
2471
ctypes.c_uint(len(openpgp)))
1666
2472
# New empty GnuTLS certificate
1667
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1668
(gnutls.library.functions
1669
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2473
crt = gnutls.openpgp_crt_t()
2474
gnutls.openpgp_crt_init(ctypes.byref(crt))
1670
2475
# Import the OpenPGP public key into the certificate
1671
(gnutls.library.functions
1672
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1673
gnutls.library.constants
1674
.GNUTLS_OPENPGP_FMT_RAW))
2476
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2477
gnutls.OPENPGP_FMT_RAW)
1675
2478
# Verify the self signature in the key
1676
2479
crtverify = ctypes.c_uint()
1677
(gnutls.library.functions
1678
.gnutls_openpgp_crt_verify_self(crt, 0,
1679
ctypes.byref(crtverify)))
2480
gnutls.openpgp_crt_verify_self(crt, 0,
2481
ctypes.byref(crtverify))
1680
2482
if crtverify.value != 0:
1681
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1682
raise (gnutls.errors.CertificateSecurityError
1683
("Verify failed"))
2483
gnutls.openpgp_crt_deinit(crt)
2484
raise gnutls.CertificateSecurityError(code
2485
=crtverify.value)
1684
2486
# New buffer for the fingerprint
1685
2487
buf = ctypes.create_string_buffer(20)
1686
2488
buf_len = ctypes.c_size_t()
1687
2489
# Get the fingerprint from the certificate into the buffer
1688
(gnutls.library.functions
1689
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1690
ctypes.byref(buf_len)))
2490
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2491
ctypes.byref(buf_len))
1691
2492
# Deinit the certificate
1692
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2493
gnutls.openpgp_crt_deinit(crt)
1693
2494
# Convert the buffer to a Python bytestring
1694
2495
fpr = ctypes.string_at(buf, buf_len.value)
1695
2496
# Convert the bytestring to hexadecimal notation
1699
2500
1700
2501
class MultiprocessingMixIn(object):
1701
2502
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2503
1702
2504
def sub_process_main(self, request, address):
1703
2505
try:
1704
2506
self.finish_request(request, address)
1705
2507
except Exception:
1706
2508
self.handle_error(request, address)
1707
2509
self.close_request(request)
1708
2510
1709
2511
def process_request(self, request, address):
1710
2512
"""Start a new process to process the request."""
1711
proc = multiprocessing.Process(target = self.sub_process_main,
1712
args = (request,
1713
address))
2513
proc = multiprocessing.Process(target=self.sub_process_main,
2514
args=(request, address))
1714
2515
proc.start()
1715
2516
return proc
1716
2517
1717
2518
1718
2519
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1719
2520
""" adds a pipe to the MixIn """
2521
1720
2522
def process_request(self, request, client_address):
1721
2523
"""Overrides and wraps the original process_request().
1722
2524
1723
2525
This function creates a new pipe in self.pipe
1724
2526
"""
1725
2527
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1726
2528
1727
2529
proc = MultiprocessingMixIn.process_request(self, request,
1728
2530
client_address)
1729
2531
self.child_pipe.close()
1730
2532
self.add_pipe(parent_pipe, proc)
1731
2533
1732
2534
def add_pipe(self, parent_pipe, proc):
1733
2535
"""Dummy function; override as necessary"""
1734
raise NotImplementedError
2536
raise NotImplementedError()
1735
2537
1736
2538
1737
2539
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1738
2540
socketserver.TCPServer, object):
1739
2541
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1740
2542
1741
2543
Attributes:
1742
2544
enabled: Boolean; whether this server is activated yet
1743
2545
interface: None or a network interface name (string)
1744
2546
use_ipv6: Boolean; to use IPv6 or not
1745
2547
"""
2548
1746
2549
def __init__(self, server_address, RequestHandlerClass,
1747
interface=None, use_ipv6=True):
2550
interface=None,
2551
use_ipv6=True,
2552
socketfd=None):
2553
"""If socketfd is set, use that file descriptor instead of
2554
creating a new one with socket.socket().
2555
"""
1748
2556
self.interface = interface
1749
2557
if use_ipv6:
1750
2558
self.address_family = socket.AF_INET6
2559
if socketfd is not None:
2560
# Save the file descriptor
2561
self.socketfd = socketfd
2562
# Save the original socket.socket() function
2563
self.socket_socket = socket.socket
2564
2565
# To implement --socket, we monkey patch socket.socket.
2566
#
2567
# (When socketserver.TCPServer is a new-style class, we
2568
# could make self.socket into a property instead of monkey
2569
# patching socket.socket.)
2570
#
2571
# Create a one-time-only replacement for socket.socket()
2572
@functools.wraps(socket.socket)
2573
def socket_wrapper(*args, **kwargs):
2574
# Restore original function so subsequent calls are
2575
# not affected.
2576
socket.socket = self.socket_socket
2577
del self.socket_socket
2578
# This time only, return a new socket object from the
2579
# saved file descriptor.
2580
return socket.fromfd(self.socketfd, *args, **kwargs)
2581
# Replace socket.socket() function with wrapper
2582
socket.socket = socket_wrapper
2583
# The socketserver.TCPServer.__init__ will call
2584
# socket.socket(), which might be our replacement,
2585
# socket_wrapper(), if socketfd was set.
1751
2586
socketserver.TCPServer.__init__(self, server_address,
1752
2587
RequestHandlerClass)
2588
1753
2589
def server_bind(self):
1754
2590
"""This overrides the normal server_bind() function
1755
2591
to bind to an interface if one was specified, and also NOT to
1756
2592
bind to an address or port if they were not specified."""
2593
global SO_BINDTODEVICE
1757
2594
if self.interface is not None:
1758
2595
if SO_BINDTODEVICE is None:
1759
logger.error("SO_BINDTODEVICE does not exist;"
1760
" cannot bind to interface %s",
1761
self.interface)
1762
else:
1763
try:
1764
self.socket.setsockopt(socket.SOL_SOCKET,
1765
SO_BINDTODEVICE,
1766
str(self.interface
1767
+ '\0'))
1768
except socket.error as error:
1769
if error[0] == errno.EPERM:
1770
logger.error("No permission to"
1771
" bind to interface %s",
1772
self.interface)
1773
elif error[0] == errno.ENOPROTOOPT:
1774
logger.error("SO_BINDTODEVICE not available;"
1775
" cannot bind to interface %s",
1776
self.interface)
1777
else:
1778
raise
2596
# Fall back to a hard-coded value which seems to be
2597
# common enough.
2598
logger.warning("SO_BINDTODEVICE not found, trying 25")
2599
SO_BINDTODEVICE = 25
2600
try:
2601
self.socket.setsockopt(
2602
socket.SOL_SOCKET, SO_BINDTODEVICE,
2603
(self.interface + "\0").encode("utf-8"))
2604
except socket.error as error:
2605
if error.errno == errno.EPERM:
2606
logger.error("No permission to bind to"
2607
" interface %s", self.interface)
2608
elif error.errno == errno.ENOPROTOOPT:
2609
logger.error("SO_BINDTODEVICE not available;"
2610
" cannot bind to interface %s",
2611
self.interface)
2612
elif error.errno == errno.ENODEV:
2613
logger.error("Interface %s does not exist,"
2614
" cannot bind", self.interface)
2615
else:
2616
raise
1779
2617
# Only bind(2) the socket if we really need to.
1780
2618
if self.server_address[0] or self.server_address[1]:
1781
2619
if not self.server_address[0]:
1782
2620
if self.address_family == socket.AF_INET6:
1783
any_address = "::" # in6addr_any
2621
any_address = "::" # in6addr_any
1784
2622
else:
1785
any_address = socket.INADDR_ANY
2623
any_address = "0.0.0.0" # INADDR_ANY
1786
2624
self.server_address = (any_address,
1787
2625
self.server_address[1])
1788
2626
elif not self.server_address[1]:
1789
self.server_address = (self.server_address[0],
1790
0)
2627
self.server_address = (self.server_address[0], 0)
1791
2628
# if self.interface:
1792
2629
# self.server_address = (self.server_address[0],
1793
2630
# 0, # port
1799
2636
1800
2637
class MandosServer(IPv6_TCPServer):
1801
2638
"""Mandos server.
1802
2639
1803
2640
Attributes:
1804
2641
clients: set of Client objects
1805
2642
gnutls_priority GnuTLS priority string
1806
2643
use_dbus: Boolean; to emit D-Bus signals or not
1807
1808
Assumes a gobject.MainLoop event loop.
2644
2645
Assumes a GLib.MainLoop event loop.
1809
2646
"""
2647
1810
2648
def __init__(self, server_address, RequestHandlerClass,
1811
interface=None, use_ipv6=True, clients=None,
1812
gnutls_priority=None, use_dbus=True):
2649
interface=None,
2650
use_ipv6=True,
2651
clients=None,
2652
gnutls_priority=None,
2653
use_dbus=True,
2654
socketfd=None):
1813
2655
self.enabled = False
1814
2656
self.clients = clients
1815
2657
if self.clients is None:
1818
2660
self.gnutls_priority = gnutls_priority
1819
2661
IPv6_TCPServer.__init__(self, server_address,
1820
2662
RequestHandlerClass,
1821
interface = interface,
1822
use_ipv6 = use_ipv6)
2663
interface=interface,
2664
use_ipv6=use_ipv6,
2665
socketfd=socketfd)
2666
1823
2667
def server_activate(self):
1824
2668
if self.enabled:
1825
2669
return socketserver.TCPServer.server_activate(self)
1826
2670
1827
2671
def enable(self):
1828
2672
self.enabled = True
1829
2673
1830
2674
def add_pipe(self, parent_pipe, proc):
1831
2675
# Call "handle_ipc" for both data and EOF events
1832
gobject.io_add_watch(parent_pipe.fileno(),
1833
gobject.IO_IN | gobject.IO_HUP,
1834
functools.partial(self.handle_ipc,
1835
parent_pipe =
1836
parent_pipe,
1837
proc = proc))
1838
1839
def handle_ipc(self, source, condition, parent_pipe=None,
1840
proc = None, client_object=None):
1841
condition_names = {
1842
gobject.IO_IN: "IN", # There is data to read.
1843
gobject.IO_OUT: "OUT", # Data can be written (without
1844
# blocking).
1845
gobject.IO_PRI: "PRI", # There is urgent data to read.
1846
gobject.IO_ERR: "ERR", # Error condition.
1847
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1848
# broken, usually for pipes and
1849
# sockets).
1850
}
1851
conditions_string = ' | '.join(name
1852
for cond, name in
1853
condition_names.iteritems()
1854
if cond & condition)
2676
GLib.io_add_watch(
2677
parent_pipe.fileno(),
2678
GLib.IO_IN | GLib.IO_HUP,
2679
functools.partial(self.handle_ipc,
2680
parent_pipe=parent_pipe,
2681
proc=proc))
2682
2683
def handle_ipc(self, source, condition,
2684
parent_pipe=None,
2685
proc=None,
2686
client_object=None):
1855
2687
# error, or the other end of multiprocessing.Pipe has closed
1856
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2688
if condition & (GLib.IO_ERR | GLib.IO_HUP):
1857
2689
# Wait for other process to exit
1858
2690
proc.join()
1859
2691
return False
1860
2692
1861
2693
# Read a request from the child
1862
2694
request = parent_pipe.recv()
1863
2695
command = request[0]
1864
2696
1865
2697
if command == 'init':
1866
fpr = request[1]
1867
address = request[2]
1868
1869
for c in self.clients.itervalues():
1870
if c.fingerprint == fpr:
2698
key_id = request[1].decode("ascii")
2699
fpr = request[2].decode("ascii")
2700
address = request[3]
2701
2702
for c in self.clients.values():
2703
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2704
continue
2705
if key_id and c.key_id == key_id:
2706
client = c
2707
break
2708
if fpr and c.fingerprint == fpr:
1871
2709
client = c
1872
2710
break
1873
2711
else:
1874
logger.info("Client not found for fingerprint: %s, ad"
1875
"dress: %s", fpr, address)
2712
logger.info("Client not found for key ID: %s, address"
2713
": %s", key_id or fpr, address)
1876
2714
if self.use_dbus:
1877
2715
# Emit D-Bus signal
1878
mandos_dbus_service.ClientNotFound(fpr,
2716
mandos_dbus_service.ClientNotFound(key_id or fpr,
1879
2717
address[0])
1880
2718
parent_pipe.send(False)
1881
2719
return False
1882
1883
gobject.io_add_watch(parent_pipe.fileno(),
1884
gobject.IO_IN | gobject.IO_HUP,
1885
functools.partial(self.handle_ipc,
1886
parent_pipe =
1887
parent_pipe,
1888
proc = proc,
1889
client_object =
1890
client))
2720
2721
GLib.io_add_watch(
2722
parent_pipe.fileno(),
2723
GLib.IO_IN | GLib.IO_HUP,
2724
functools.partial(self.handle_ipc,
2725
parent_pipe=parent_pipe,
2726
proc=proc,
2727
client_object=client))
1891
2728
parent_pipe.send(True)
1892
2729
# remove the old hook in favor of the new above hook on
1893
2730
# same fileno
1896
2733
funcname = request[1]
1897
2734
args = request[2]
1898
2735
kwargs = request[3]
1899
2736
1900
2737
parent_pipe.send(('data', getattr(client_object,
1901
2738
funcname)(*args,
1902
**kwargs)))
1903
2739
**kwargs)))
2740
1904
2741
if command == 'getattr':
1905
2742
attrname = request[1]
1906
if callable(client_object.__getattribute__(attrname)):
1907
parent_pipe.send(('function',))
2743
if isinstance(client_object.__getattribute__(attrname),
2744
collections.Callable):
2745
parent_pipe.send(('function', ))
1908
2746
else:
1909
parent_pipe.send(('data', client_object
1910
.__getattribute__(attrname)))
1911
2747
parent_pipe.send((
2748
'data', client_object.__getattribute__(attrname)))
2749
1912
2750
if command == 'setattr':
1913
2751
attrname = request[1]
1914
2752
value = request[2]
1915
2753
setattr(client_object, attrname, value)
1916
2754
1917
2755
return True
1918
2756
1919
2757
2758
def rfc3339_duration_to_delta(duration):
2759
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2760
2761
>>> rfc3339_duration_to_delta("P7D")
2762
datetime.timedelta(7)
2763
>>> rfc3339_duration_to_delta("PT60S")
2764
datetime.timedelta(0, 60)
2765
>>> rfc3339_duration_to_delta("PT60M")
2766
datetime.timedelta(0, 3600)
2767
>>> rfc3339_duration_to_delta("PT24H")
2768
datetime.timedelta(1)
2769
>>> rfc3339_duration_to_delta("P1W")
2770
datetime.timedelta(7)
2771
>>> rfc3339_duration_to_delta("PT5M30S")
2772
datetime.timedelta(0, 330)
2773
>>> rfc3339_duration_to_delta("P1DT3M20S")
2774
datetime.timedelta(1, 200)
2775
"""
2776
2777
# Parsing an RFC 3339 duration with regular expressions is not
2778
# possible - there would have to be multiple places for the same
2779
# values, like seconds. The current code, while more esoteric, is
2780
# cleaner without depending on a parsing library. If Python had a
2781
# built-in library for parsing we would use it, but we'd like to
2782
# avoid excessive use of external libraries.
2783
2784
# New type for defining tokens, syntax, and semantics all-in-one
2785
Token = collections.namedtuple("Token", (
2786
"regexp", # To match token; if "value" is not None, must have
2787
# a "group" containing digits
2788
"value", # datetime.timedelta or None
2789
"followers")) # Tokens valid after this token
2790
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2791
# the "duration" ABNF definition in RFC 3339, Appendix A.
2792
token_end = Token(re.compile(r"$"), None, frozenset())
2793
token_second = Token(re.compile(r"(\d+)S"),
2794
datetime.timedelta(seconds=1),
2795
frozenset((token_end, )))
2796
token_minute = Token(re.compile(r"(\d+)M"),
2797
datetime.timedelta(minutes=1),
2798
frozenset((token_second, token_end)))
2799
token_hour = Token(re.compile(r"(\d+)H"),
2800
datetime.timedelta(hours=1),
2801
frozenset((token_minute, token_end)))
2802
token_time = Token(re.compile(r"T"),
2803
None,
2804
frozenset((token_hour, token_minute,
2805
token_second)))
2806
token_day = Token(re.compile(r"(\d+)D"),
2807
datetime.timedelta(days=1),
2808
frozenset((token_time, token_end)))
2809
token_month = Token(re.compile(r"(\d+)M"),
2810
datetime.timedelta(weeks=4),
2811
frozenset((token_day, token_end)))
2812
token_year = Token(re.compile(r"(\d+)Y"),
2813
datetime.timedelta(weeks=52),
2814
frozenset((token_month, token_end)))
2815
token_week = Token(re.compile(r"(\d+)W"),
2816
datetime.timedelta(weeks=1),
2817
frozenset((token_end, )))
2818
token_duration = Token(re.compile(r"P"), None,
2819
frozenset((token_year, token_month,
2820
token_day, token_time,
2821
token_week)))
2822
# Define starting values:
2823
# Value so far
2824
value = datetime.timedelta()
2825
found_token = None
2826
# Following valid tokens
2827
followers = frozenset((token_duration, ))
2828
# String left to parse
2829
s = duration
2830
# Loop until end token is found
2831
while found_token is not token_end:
2832
# Search for any currently valid tokens
2833
for token in followers:
2834
match = token.regexp.match(s)
2835
if match is not None:
2836
# Token found
2837
if token.value is not None:
2838
# Value found, parse digits
2839
factor = int(match.group(1), 10)
2840
# Add to value so far
2841
value += factor * token.value
2842
# Strip token from string
2843
s = token.regexp.sub("", s, 1)
2844
# Go to found token
2845
found_token = token
2846
# Set valid next tokens
2847
followers = found_token.followers
2848
break
2849
else:
2850
# No currently valid tokens were found
2851
raise ValueError("Invalid RFC 3339 duration: {!r}"
2852
.format(duration))
2853
# End token found
2854
return value
2855
2856
1920
2857
def string_to_delta(interval):
1921
2858
"""Parse a string and return a datetime.timedelta
1922
2859
1923
2860
>>> string_to_delta('7d')
1924
2861
datetime.timedelta(7)
1925
2862
>>> string_to_delta('60s')
1933
2870
>>> string_to_delta('5m 30s')
1934
2871
datetime.timedelta(0, 330)
1935
2872
"""
2873
2874
try:
2875
return rfc3339_duration_to_delta(interval)
2876
except ValueError:
2877
pass
2878
1936
2879
timevalue = datetime.timedelta(0)
1937
2880
for s in interval.split():
1938
2881
try:
1939
suffix = unicode(s[-1])
2882
suffix = s[-1]
1940
2883
value = int(s[:-1])
1941
2884
if suffix == "d":
1942
2885
delta = datetime.timedelta(value)
1949
2892
elif suffix == "w":
1950
2893
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1951
2894
else:
1952
raise ValueError("Unknown suffix %r" % suffix)
1953
except (ValueError, IndexError) as e:
2895
raise ValueError("Unknown suffix {!r}".format(suffix))
2896
except IndexError as e:
1954
2897
raise ValueError(*(e.args))
1955
2898
timevalue += delta
1956
2899
return timevalue
1957
2900
1958
2901
1959
def daemon(nochdir = False, noclose = False):
2902
def daemon(nochdir=False, noclose=False):
1960
2903
"""See daemon(3). Standard BSD Unix function.
1961
2904
1962
2905
This should really exist as os.daemon, but it doesn't (yet)."""
1963
2906
if os.fork():
1964
2907
sys.exit()
1969
2912
sys.exit()
1970
2913
if not noclose:
1971
2914
# Close all standard open file descriptors
1972
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2915
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1973
2916
if not stat.S_ISCHR(os.fstat(null).st_mode):
1974
2917
raise OSError(errno.ENODEV,
1975
"%s not a character device"
1976
% os.path.devnull)
2918
"{} not a character device"
2919
.format(os.devnull))
1977
2920
os.dup2(null, sys.stdin.fileno())
1978
2921
os.dup2(null, sys.stdout.fileno())
1979
2922
os.dup2(null, sys.stderr.fileno())
1982
2925
1983
2926
1984
2927
def main():
1985
2928
1986
2929
##################################################################
1987
2930
# Parsing of options, both command line and config file
1988
2931
1989
2932
parser = argparse.ArgumentParser()
1990
2933
parser.add_argument("-v", "--version", action="version",
1991
version = "%%(prog)s %s" % version,
2934
version="%(prog)s {}".format(version),
1992
2935
help="show version number and exit")
1993
2936
parser.add_argument("-i", "--interface", metavar="IF",
1994
2937
help="Bind to interface IF")
2000
2943
help="Run self-test")
2001
2944
parser.add_argument("--debug", action="store_true",
2002
2945
help="Debug mode; run in foreground and log"
2003
" to terminal")
2946
" to terminal", default=None)
2004
2947
parser.add_argument("--debuglevel", metavar="LEVEL",
2005
2948
help="Debug level for stdout output")
2006
2949
parser.add_argument("--priority", help="GnuTLS"
2013
2956
" files")
2014
2957
parser.add_argument("--no-dbus", action="store_false",
2015
2958
dest="use_dbus", help="Do not provide D-Bus"
2016
" system bus interface")
2959
" system bus interface", default=None)
2017
2960
parser.add_argument("--no-ipv6", action="store_false",
2018
dest="use_ipv6", help="Do not use IPv6")
2961
dest="use_ipv6", help="Do not use IPv6",
2962
default=None)
2019
2963
parser.add_argument("--no-restore", action="store_false",
2020
2964
dest="restore", help="Do not restore stored"
2021
" state")
2965
" state", default=None)
2966
parser.add_argument("--socket", type=int,
2967
help="Specify a file descriptor to a network"
2968
" socket to use instead of creating one")
2022
2969
parser.add_argument("--statedir", metavar="DIR",
2023
2970
help="Directory to save/restore state in")
2024
2971
parser.add_argument("--foreground", action="store_true",
2972
help="Run in foreground", default=None)
2973
parser.add_argument("--no-zeroconf", action="store_false",
2974
dest="zeroconf", help="Do not use Zeroconf",
2975
default=None)
2976
2025
2977
options = parser.parse_args()
2026
2978
2027
2979
if options.check:
2028
2980
import doctest
2029
doctest.testmod()
2030
sys.exit()
2031
2981
fail_count, test_count = doctest.testmod()
2982
sys.exit(os.EX_OK if fail_count == 0 else 1)
2983
2032
2984
# Default values for config file for server-global settings
2033
server_defaults = { "interface": "",
2034
"address": "",
2035
"port": "",
2036
"debug": "False",
2037
"priority":
2038
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2039
"servicename": "Mandos",
2040
"use_dbus": "True",
2041
"use_ipv6": "True",
2042
"debuglevel": "",
2043
"restore": "True",
2044
"statedir": "/var/lib/mandos"
2045
}
2046
2985
if gnutls.has_rawpk:
2986
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2987
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2988
else:
2989
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2990
":+SIGN-DSA-SHA256")
2991
server_defaults = {"interface": "",
2992
"address": "",
2993
"port": "",
2994
"debug": "False",
2995
"priority": priority,
2996
"servicename": "Mandos",
2997
"use_dbus": "True",
2998
"use_ipv6": "True",
2999
"debuglevel": "",
3000
"restore": "True",
3001
"socket": "",
3002
"statedir": "/var/lib/mandos",
3003
"foreground": "False",
3004
"zeroconf": "True",
3005
}
3006
del priority
3007
2047
3008
# Parse config file for server-global settings
2048
3009
server_config = configparser.SafeConfigParser(server_defaults)
2049
3010
del server_defaults
2050
server_config.read(os.path.join(options.configdir,
2051
"mandos.conf"))
3011
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2052
3012
# Convert the SafeConfigParser object to a dict
2053
3013
server_settings = server_config.defaults()
2054
3014
# Use the appropriate methods on the non-string config options
2055
for option in ("debug", "use_dbus", "use_ipv6"):
3015
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3016
"foreground", "zeroconf"):
2056
3017
server_settings[option] = server_config.getboolean("DEFAULT",
2057
3018
option)
2058
3019
if server_settings["port"]:
2059
3020
server_settings["port"] = server_config.getint("DEFAULT",
2060
3021
"port")
3022
if server_settings["socket"]:
3023
server_settings["socket"] = server_config.getint("DEFAULT",
3024
"socket")
3025
# Later, stdin will, and stdout and stderr might, be dup'ed
3026
# over with an opened os.devnull. But we don't want this to
3027
# happen with a supplied network socket.
3028
if 0 <= server_settings["socket"] <= 2:
3029
server_settings["socket"] = os.dup(server_settings
3030
["socket"])
2061
3031
del server_config
2062
3032
2063
3033
# Override the settings from the config file with command line
2064
3034
# options, if set.
2065
3035
for option in ("interface", "address", "port", "debug",
2066
"priority", "servicename", "configdir",
2067
"use_dbus", "use_ipv6", "debuglevel", "restore",
2068
"statedir"):
3036
"priority", "servicename", "configdir", "use_dbus",
3037
"use_ipv6", "debuglevel", "restore", "statedir",
3038
"socket", "foreground", "zeroconf"):
2069
3039
value = getattr(options, option)
2070
3040
if value is not None:
2071
3041
server_settings[option] = value
2072
3042
del options
2073
3043
# Force all strings to be unicode
2074
3044
for option in server_settings.keys():
2075
if type(server_settings[option]) is str:
2076
server_settings[option] = unicode(server_settings[option])
3045
if isinstance(server_settings[option], bytes):
3046
server_settings[option] = (server_settings[option]
3047
.decode("utf-8"))
3048
# Force all boolean options to be boolean
3049
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3050
"foreground", "zeroconf"):
3051
server_settings[option] = bool(server_settings[option])
3052
# Debug implies foreground
3053
if server_settings["debug"]:
3054
server_settings["foreground"] = True
2077
3055
# Now we have our good server settings in "server_settings"
2078
3056
2079
3057
##################################################################
2080
3058
3059
if (not server_settings["zeroconf"]
3060
and not (server_settings["port"]
3061
or server_settings["socket"] != "")):
3062
parser.error("Needs port or socket to work without Zeroconf")
3063
2081
3064
# For convenience
2082
3065
debug = server_settings["debug"]
2083
3066
debuglevel = server_settings["debuglevel"]
2085
3068
use_ipv6 = server_settings["use_ipv6"]
2086
3069
stored_state_path = os.path.join(server_settings["statedir"],
2087
3070
stored_state_file)
2088
3071
foreground = server_settings["foreground"]
3072
zeroconf = server_settings["zeroconf"]
3073
2089
3074
if debug:
2090
3075
initlogger(debug, logging.DEBUG)
2091
3076
else:
2094
3079
else:
2095
3080
level = getattr(logging, debuglevel.upper())
2096
3081
initlogger(debug, level)
2097
3082
2098
3083
if server_settings["servicename"] != "Mandos":
2099
syslogger.setFormatter(logging.Formatter
2100
('Mandos (%s) [%%(process)d]:'
2101
' %%(levelname)s: %%(message)s'
2102
% server_settings["servicename"]))
2103
3084
syslogger.setFormatter(
3085
logging.Formatter('Mandos ({}) [%(process)d]:'
3086
' %(levelname)s: %(message)s'.format(
3087
server_settings["servicename"])))
3088
2104
3089
# Parse config file with clients
2105
3090
client_config = configparser.SafeConfigParser(Client
2106
3091
.client_defaults)
2107
3092
client_config.read(os.path.join(server_settings["configdir"],
2108
3093
"clients.conf"))
2109
3094
2110
3095
global mandos_dbus_service
2111
3096
mandos_dbus_service = None
2112
2113
tcp_server = MandosServer((server_settings["address"],
2114
server_settings["port"]),
2115
ClientHandler,
2116
interface=(server_settings["interface"]
2117
or None),
2118
use_ipv6=use_ipv6,
2119
gnutls_priority=
2120
server_settings["priority"],
2121
use_dbus=use_dbus)
2122
if not debug:
2123
pidfilename = "/var/run/mandos.pid"
2124
try:
2125
pidfile = open(pidfilename, "w")
2126
except IOError:
2127
logger.error("Could not open file %r", pidfilename)
2128
2129
try:
2130
uid = pwd.getpwnam("_mandos").pw_uid
2131
gid = pwd.getpwnam("_mandos").pw_gid
2132
except KeyError:
2133
try:
2134
uid = pwd.getpwnam("mandos").pw_uid
2135
gid = pwd.getpwnam("mandos").pw_gid
3097
3098
socketfd = None
3099
if server_settings["socket"] != "":
3100
socketfd = server_settings["socket"]
3101
tcp_server = MandosServer(
3102
(server_settings["address"], server_settings["port"]),
3103
ClientHandler,
3104
interface=(server_settings["interface"] or None),
3105
use_ipv6=use_ipv6,
3106
gnutls_priority=server_settings["priority"],
3107
use_dbus=use_dbus,
3108
socketfd=socketfd)
3109
if not foreground:
3110
pidfilename = "/run/mandos.pid"
3111
if not os.path.isdir("/run/."):
3112
pidfilename = "/var/run/mandos.pid"
3113
pidfile = None
3114
try:
3115
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3116
except IOError as e:
3117
logger.error("Could not open file %r", pidfilename,
3118
exc_info=e)
3119
3120
for name, group in (("_mandos", "_mandos"),
3121
("mandos", "mandos"),
3122
("nobody", "nogroup")):
3123
try:
3124
uid = pwd.getpwnam(name).pw_uid
3125
gid = pwd.getpwnam(group).pw_gid
3126
break
2136
3127
except KeyError:
2137
try:
2138
uid = pwd.getpwnam("nobody").pw_uid
2139
gid = pwd.getpwnam("nobody").pw_gid
2140
except KeyError:
2141
uid = 65534
2142
gid = 65534
3128
continue
3129
else:
3130
uid = 65534
3131
gid = 65534
2143
3132
try:
2144
3133
os.setgid(gid)
2145
3134
os.setuid(uid)
3135
if debug:
3136
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3137
gid))
2146
3138
except OSError as error:
2147
if error[0] != errno.EPERM:
2148
raise error
2149
3139
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3140
.format(uid, gid, os.strerror(error.errno)))
3141
if error.errno != errno.EPERM:
3142
raise
3143
2150
3144
if debug:
2151
3145
# Enable all possible GnuTLS debugging
2152
3146
2153
3147
# "Use a log level over 10 to enable all debugging options."
2154
3148
# - GnuTLS manual
2155
gnutls.library.functions.gnutls_global_set_log_level(11)
2156
2157
@gnutls.library.types.gnutls_log_func
3149
gnutls.global_set_log_level(11)
3150
3151
@gnutls.log_func
2158
3152
def debug_gnutls(level, string):
2159
3153
logger.debug("GnuTLS: %s", string[:-1])
2160
2161
(gnutls.library.functions
2162
.gnutls_global_set_log_function(debug_gnutls))
2163
3154
3155
gnutls.global_set_log_function(debug_gnutls)
3156
2164
3157
# Redirect stdin so all checkers get /dev/null
2165
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3158
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2166
3159
os.dup2(null, sys.stdin.fileno())
2167
3160
if null > 2:
2168
3161
os.close(null)
2169
3162
2170
3163
# Need to fork before connecting to D-Bus
2171
if not debug:
3164
if not foreground:
2172
3165
# Close all input and output, do double fork, etc.
2173
3166
daemon()
2174
2175
gobject.threads_init()
2176
3167
3168
# multiprocessing will use threads, so before we use GLib we need
3169
# to inform GLib that threads will be used.
3170
GLib.threads_init()
3171
2177
3172
global main_loop
2178
3173
# From the Avahi example code
2179
DBusGMainLoop(set_as_default=True )
2180
main_loop = gobject.MainLoop()
3174
DBusGMainLoop(set_as_default=True)
3175
main_loop = GLib.MainLoop()
2181
3176
bus = dbus.SystemBus()
2182
3177
# End of Avahi example code
2183
3178
if use_dbus:
2184
3179
try:
2185
3180
bus_name = dbus.service.BusName("se.recompile.Mandos",
2186
bus, do_not_queue=True)
2187
old_bus_name = (dbus.service.BusName
2188
("se.bsnet.fukt.Mandos", bus,
2189
do_not_queue=True))
2190
except dbus.exceptions.NameExistsException as e:
2191
logger.error(unicode(e) + ", disabling D-Bus")
3181
bus,
3182
do_not_queue=True)
3183
old_bus_name = dbus.service.BusName(
3184
"se.bsnet.fukt.Mandos", bus,
3185
do_not_queue=True)
3186
except dbus.exceptions.DBusException as e:
3187
logger.error("Disabling D-Bus:", exc_info=e)
2192
3188
use_dbus = False
2193
3189
server_settings["use_dbus"] = False
2194
3190
tcp_server.use_dbus = False
2195
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2196
service = AvahiServiceToSyslog(name =
2197
server_settings["servicename"],
2198
servicetype = "_mandos._tcp",
2199
protocol = protocol, bus = bus)
2200
if server_settings["interface"]:
2201
service.interface = (if_nametoindex
2202
(str(server_settings["interface"])))
2203
3191
if zeroconf:
3192
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3193
service = AvahiServiceToSyslog(
3194
name=server_settings["servicename"],
3195
servicetype="_mandos._tcp",
3196
protocol=protocol,
3197
bus=bus)
3198
if server_settings["interface"]:
3199
service.interface = if_nametoindex(
3200
server_settings["interface"].encode("utf-8"))
3201
2204
3202
global multiprocessing_manager
2205
3203
multiprocessing_manager = multiprocessing.Manager()
2206
3204
2207
3205
client_class = Client
2208
3206
if use_dbus:
2209
client_class = functools.partial(ClientDBusTransitional,
2210
bus = bus)
2211
3207
client_class = functools.partial(ClientDBus, bus=bus)
3208
2212
3209
client_settings = Client.config_parser(client_config)
2213
3210
old_client_settings = {}
2214
3211
clients_data = {}
2215
3212
3213
# This is used to redirect stdout and stderr for checker processes
3214
global wnull
3215
wnull = open(os.devnull, "w") # A writable /dev/null
3216
# Only used if server is running in foreground but not in debug
3217
# mode
3218
if debug or not foreground:
3219
wnull.close()
3220
2216
3221
# Get client data and settings from last running state.
2217
3222
if server_settings["restore"]:
2218
3223
try:
2219
3224
with open(stored_state_path, "rb") as stored_state:
2220
clients_data, old_client_settings = (pickle.load
2221
(stored_state))
3225
if sys.version_info.major == 2:
3226
clients_data, old_client_settings = pickle.load(
3227
stored_state)
3228
else:
3229
bytes_clients_data, bytes_old_client_settings = (
3230
pickle.load(stored_state, encoding="bytes"))
3231
# Fix bytes to strings
3232
# clients_data
3233
# .keys()
3234
clients_data = {(key.decode("utf-8")
3235
if isinstance(key, bytes)
3236
else key): value
3237
for key, value in
3238
bytes_clients_data.items()}
3239
del bytes_clients_data
3240
for key in clients_data:
3241
value = {(k.decode("utf-8")
3242
if isinstance(k, bytes) else k): v
3243
for k, v in
3244
clients_data[key].items()}
3245
clients_data[key] = value
3246
# .client_structure
3247
value["client_structure"] = [
3248
(s.decode("utf-8")
3249
if isinstance(s, bytes)
3250
else s) for s in
3251
value["client_structure"]]
3252
# .name & .host
3253
for k in ("name", "host"):
3254
if isinstance(value[k], bytes):
3255
value[k] = value[k].decode("utf-8")
3256
if not value.has_key("key_id"):
3257
value["key_id"] = ""
3258
elif not value.has_key("fingerprint"):
3259
value["fingerprint"] = ""
3260
# old_client_settings
3261
# .keys()
3262
old_client_settings = {
3263
(key.decode("utf-8")
3264
if isinstance(key, bytes)
3265
else key): value
3266
for key, value in
3267
bytes_old_client_settings.items()}
3268
del bytes_old_client_settings
3269
# .host
3270
for value in old_client_settings.values():
3271
if isinstance(value["host"], bytes):
3272
value["host"] = (value["host"]
3273
.decode("utf-8"))
2222
3274
os.remove(stored_state_path)
2223
3275
except IOError as e:
2224
logger.warning("Could not load persistent state: {0}"
2225
.format(e))
2226
if e.errno != errno.ENOENT:
3276
if e.errno == errno.ENOENT:
3277
logger.warning("Could not load persistent state:"
3278
" {}".format(os.strerror(e.errno)))
3279
else:
3280
logger.critical("Could not load persistent state:",
3281
exc_info=e)
2227
3282
raise
2228
3283
except EOFError as e:
2229
3284
logger.warning("Could not load persistent state: "
2230
"EOFError: {0}".format(e))
2231
3285
"EOFError:",
3286
exc_info=e)
3287
2232
3288
with PGPEngine() as pgp:
2233
for client_name, client in clients_data.iteritems():
3289
for client_name, client in clients_data.items():
3290
# Skip removed clients
3291
if client_name not in client_settings:
3292
continue
3293
2234
3294
# Decide which value to use after restoring saved state.
2235
3295
# We have three different values: Old config file,
2236
3296
# new config file, and saved state.
2241
3301
# For each value in new config, check if it
2242
3302
# differs from the old config value (Except for
2243
3303
# the "secret" attribute)
2244
if (name != "secret" and
2245
value != old_client_settings[client_name]
2246
[name]):
3304
if (name != "secret"
3305
and (value !=
3306
old_client_settings[client_name][name])):
2247
3307
client[name] = value
2248
3308
except KeyError:
2249
3309
pass
2250
3310
2251
3311
# Clients who has passed its expire date can still be
2252
# enabled if its last checker was successful. Clients
2253
# whose checker failed before we stored its state is
2254
# assumed to have failed all checkers during downtime.
3312
# enabled if its last checker was successful. A Client
3313
# whose checker succeeded before we stored its state is
3314
# assumed to have successfully run all checkers during
3315
# downtime.
2255
3316
if client["enabled"]:
2256
3317
if datetime.datetime.utcnow() >= client["expires"]:
2257
3318
if not client["last_checked_ok"]:
2258
3319
logger.warning(
2259
"disabling client {0} - Client never "
2260
"performed a successfull checker"
2261
.format(client["name"]))
3320
"disabling client {} - Client never "
3321
"performed a successful checker".format(
3322
client_name))
2262
3323
client["enabled"] = False
2263
3324
elif client["last_checker_status"] != 0:
2264
3325
logger.warning(
2265
"disabling client {0} - Client "
2266
"last checker failed with error code {1}"
2267
.format(client["name"],
2268
client["last_checker_status"]))
3326
"disabling client {} - Client last"
3327
" checker failed with error code"
3328
" {}".format(
3329
client_name,
3330
client["last_checker_status"]))
2269
3331
client["enabled"] = False
2270
3332
else:
2271
client["expires"] = (datetime.datetime
2272
.utcnow()
2273
+ client["timeout"])
3333
client["expires"] = (
3334
datetime.datetime.utcnow()
3335
+ client["timeout"])
2274
3336
logger.debug("Last checker succeeded,"
2275
" keeping {0} enabled"
2276
.format(client["name"]))
3337
" keeping {} enabled".format(
3338
client_name))
2277
3339
try:
2278
client["secret"] = (
2279
pgp.decrypt(client["encrypted_secret"],
2280
client_settings[client_name]
2281
["secret"]))
3340
client["secret"] = pgp.decrypt(
3341
client["encrypted_secret"],
3342
client_settings[client_name]["secret"])
2282
3343
except PGPError:
2283
3344
# If decryption fails, we use secret from new settings
2284
logger.debug("Failed to decrypt {0} old secret"
2285
.format(client_name))
2286
client["secret"] = (
2287
client_settings[client_name]["secret"])
3345
logger.debug("Failed to decrypt {} old secret".format(
3346
client_name))
3347
client["secret"] = (client_settings[client_name]
3348
["secret"])
2288
3349
2289
2290
3350
# Add/remove clients based on new changes made to config
2291
3351
for client_name in (set(old_client_settings)
2292
3352
- set(client_settings)):
2295
3355
- set(old_client_settings)):
2296
3356
clients_data[client_name] = client_settings[client_name]
2297
3357
2298
# Create clients all clients
2299
for client_name, client in clients_data.iteritems():
3358
# Create all client objects
3359
for client_name, client in clients_data.items():
2300
3360
tcp_server.clients[client_name] = client_class(
2301
name = client_name, settings = client)
2302
3361
name=client_name,
3362
settings=client,
3363
server_settings=server_settings)
3364
2303
3365
if not tcp_server.clients:
2304
3366
logger.warning("No clients defined")
2305
2306
if not debug:
2307
try:
2308
with pidfile:
2309
pid = os.getpid()
2310
pidfile.write(str(pid) + "\n".encode("utf-8"))
2311
del pidfile
2312
except IOError:
2313
logger.error("Could not write to file %r with PID %d",
2314
pidfilename, pid)
2315
except NameError:
2316
# "pidfile" was never created
2317
pass
3367
3368
if not foreground:
3369
if pidfile is not None:
3370
pid = os.getpid()
3371
try:
3372
with pidfile:
3373
print(pid, file=pidfile)
3374
except IOError:
3375
logger.error("Could not write to file %r with PID %d",
3376
pidfilename, pid)
3377
del pidfile
2318
3378
del pidfilename
2319
signal.signal(signal.SIGINT, signal.SIG_IGN)
2320
2321
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2322
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2323
3379
3380
for termsig in (signal.SIGHUP, signal.SIGTERM):
3381
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3382
lambda: main_loop.quit() and False)
3383
2324
3384
if use_dbus:
2325
class MandosDBusService(dbus.service.Object):
3385
3386
@alternate_dbus_interfaces(
3387
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3388
class MandosDBusService(DBusObjectWithObjectManager):
2326
3389
"""A D-Bus proxy object"""
3390
2327
3391
def __init__(self):
2328
3392
dbus.service.Object.__init__(self, bus, "/")
3393
2329
3394
_interface = "se.recompile.Mandos"
2330
3395
2331
3396
@dbus.service.signal(_interface, signature="o")
2332
3397
def ClientAdded(self, objpath):
2333
3398
"D-Bus signal"
2334
3399
pass
2335
3400
2336
3401
@dbus.service.signal(_interface, signature="ss")
2337
def ClientNotFound(self, fingerprint, address):
3402
def ClientNotFound(self, key_id, address):
2338
3403
"D-Bus signal"
2339
3404
pass
2340
3405
3406
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3407
"true"})
2341
3408
@dbus.service.signal(_interface, signature="os")
2342
3409
def ClientRemoved(self, objpath, name):
2343
3410
"D-Bus signal"
2344
3411
pass
2345
3412
3413
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3414
"true"})
2346
3415
@dbus.service.method(_interface, out_signature="ao")
2347
3416
def GetAllClients(self):
2348
3417
"D-Bus method"
2349
return dbus.Array(c.dbus_object_path
2350
for c in
2351
tcp_server.clients.itervalues())
2352
3418
return dbus.Array(c.dbus_object_path for c in
3419
tcp_server.clients.values())
3420
3421
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3422
"true"})
2353
3423
@dbus.service.method(_interface,
2354
3424
out_signature="a{oa{sv}}")
2355
3425
def GetAllClientsWithProperties(self):
2356
3426
"D-Bus method"
2357
3427
return dbus.Dictionary(
2358
((c.dbus_object_path, c.GetAll(""))
2359
for c in tcp_server.clients.itervalues()),
3428
{c.dbus_object_path: c.GetAll(
3429
"se.recompile.Mandos.Client")
3430
for c in tcp_server.clients.values()},
2360
3431
signature="oa{sv}")
2361
3432
2362
3433
@dbus.service.method(_interface, in_signature="o")
2363
3434
def RemoveClient(self, object_path):
2364
3435
"D-Bus method"
2365
for c in tcp_server.clients.itervalues():
3436
for c in tcp_server.clients.values():
2366
3437
if c.dbus_object_path == object_path:
2367
3438
del tcp_server.clients[c.name]
2368
3439
c.remove_from_connection()
2369
# Don't signal anything except ClientRemoved
3440
# Don't signal the disabling
2370
3441
c.disable(quiet=True)
2371
# Emit D-Bus signal
2372
self.ClientRemoved(object_path, c.name)
3442
# Emit D-Bus signal for removal
3443
self.client_removed_signal(c)
2373
3444
return
2374
3445
raise KeyError(object_path)
2375
3446
2376
3447
del _interface
2377
2378
class MandosDBusServiceTransitional(MandosDBusService):
2379
__metaclass__ = AlternateDBusNamesMetaclass
2380
mandos_dbus_service = MandosDBusServiceTransitional()
2381
3448
3449
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3450
out_signature="a{oa{sa{sv}}}")
3451
def GetManagedObjects(self):
3452
"""D-Bus method"""
3453
return dbus.Dictionary(
3454
{client.dbus_object_path:
3455
dbus.Dictionary(
3456
{interface: client.GetAll(interface)
3457
for interface in
3458
client._get_all_interface_names()})
3459
for client in tcp_server.clients.values()})
3460
3461
def client_added_signal(self, client):
3462
"""Send the new standard signal and the old signal"""
3463
if use_dbus:
3464
# New standard signal
3465
self.InterfacesAdded(
3466
client.dbus_object_path,
3467
dbus.Dictionary(
3468
{interface: client.GetAll(interface)
3469
for interface in
3470
client._get_all_interface_names()}))
3471
# Old signal
3472
self.ClientAdded(client.dbus_object_path)
3473
3474
def client_removed_signal(self, client):
3475
"""Send the new standard signal and the old signal"""
3476
if use_dbus:
3477
# New standard signal
3478
self.InterfacesRemoved(
3479
client.dbus_object_path,
3480
client._get_all_interface_names())
3481
# Old signal
3482
self.ClientRemoved(client.dbus_object_path,
3483
client.name)
3484
3485
mandos_dbus_service = MandosDBusService()
3486
3487
# Save modules to variables to exempt the modules from being
3488
# unloaded before the function registered with atexit() is run.
3489
mp = multiprocessing
3490
wn = wnull
3491
2382
3492
def cleanup():
2383
3493
"Cleanup function; run on exit"
2384
service.cleanup()
2385
2386
multiprocessing.active_children()
3494
if zeroconf:
3495
service.cleanup()
3496
3497
mp.active_children()
3498
wn.close()
2387
3499
if not (tcp_server.clients or client_settings):
2388
3500
return
2389
3501
2390
3502
# Store client before exiting. Secrets are encrypted with key
2391
3503
# based on what config file has. If config file is
2392
3504
# removed/edited, old secret will thus be unrecovable.
2393
3505
clients = {}
2394
3506
with PGPEngine() as pgp:
2395
for client in tcp_server.clients.itervalues():
3507
for client in tcp_server.clients.values():
2396
3508
key = client_settings[client.name]["secret"]
2397
3509
client.encrypted_secret = pgp.encrypt(client.secret,
2398
3510
key)
2399
3511
client_dict = {}
2400
3512
2401
3513
# A list of attributes that can not be pickled
2402
3514
# + secret.
2403
exclude = set(("bus", "changedstate", "secret",
2404
"checker"))
2405
for name, typ in (inspect.getmembers
2406
(dbus.service.Object)):
3515
exclude = {"bus", "changedstate", "secret",
3516
"checker", "server_settings"}
3517
for name, typ in inspect.getmembers(dbus.service
3518
.Object):
2407
3519
exclude.add(name)
2408
3520
2409
3521
client_dict["encrypted_secret"] = (client
2410
3522
.encrypted_secret)
2411
3523
for attr in client.client_structure:
2412
3524
if attr not in exclude:
2413
3525
client_dict[attr] = getattr(client, attr)
2414
3526
2415
3527
clients[client.name] = client_dict
2416
3528
del client_settings[client.name]["secret"]
2417
3529
2418
3530
try:
2419
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2420
prefix="clients-",
2421
dir=os.path.dirname
2422
(stored_state_path))
2423
with os.fdopen(tempfd, "wb") as stored_state:
2424
pickle.dump((clients, client_settings), stored_state)
3531
with tempfile.NamedTemporaryFile(
3532
mode='wb',
3533
suffix=".pickle",
3534
prefix='clients-',
3535
dir=os.path.dirname(stored_state_path),
3536
delete=False) as stored_state:
3537
pickle.dump((clients, client_settings), stored_state,
3538
protocol=2)
3539
tempname = stored_state.name
2425
3540
os.rename(tempname, stored_state_path)
2426
3541
except (IOError, OSError) as e:
2427
logger.warning("Could not save persistent state: {0}"
2428
.format(e))
2429
3542
if not debug:
2430
3543
try:
2431
3544
os.remove(tempname)
2432
3545
except NameError:
2433
3546
pass
2434
if e.errno not in set((errno.ENOENT, errno.EACCES,
2435
errno.EEXIST)):
2436
raise e
2437
3547
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3548
logger.warning("Could not save persistent state: {}"
3549
.format(os.strerror(e.errno)))
3550
else:
3551
logger.warning("Could not save persistent state:",
3552
exc_info=e)
3553
raise
3554
2438
3555
# Delete all clients, and settings from config
2439
3556
while tcp_server.clients:
2440
3557
name, client = tcp_server.clients.popitem()
2441
3558
if use_dbus:
2442
3559
client.remove_from_connection()
2443
# Don't signal anything except ClientRemoved
3560
# Don't signal the disabling
2444
3561
client.disable(quiet=True)
3562
# Emit D-Bus signal for removal
2445
3563
if use_dbus:
2446
# Emit D-Bus signal
2447
mandos_dbus_service.ClientRemoved(client
2448
.dbus_object_path,
2449
client.name)
3564
mandos_dbus_service.client_removed_signal(client)
2450
3565
client_settings.clear()
2451
3566
2452
3567
atexit.register(cleanup)
2453
2454
for client in tcp_server.clients.itervalues():
3568
3569
for client in tcp_server.clients.values():
2455
3570
if use_dbus:
2456
# Emit D-Bus signal
2457
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3571
# Emit D-Bus signal for adding
3572
mandos_dbus_service.client_added_signal(client)
2458
3573
# Need to initiate checking of clients
2459
3574
if client.enabled:
2460
3575
client.init_checker()
2461
3576
2462
3577
tcp_server.enable()
2463
3578
tcp_server.server_activate()
2464
3579
2465
3580
# Find out what port we got
2466
service.port = tcp_server.socket.getsockname()[1]
3581
if zeroconf:
3582
service.port = tcp_server.socket.getsockname()[1]
2467
3583
if use_ipv6:
2468
3584
logger.info("Now listening on address %r, port %d,"
2469
" flowinfo %d, scope_id %d"
2470
% tcp_server.socket.getsockname())
3585
" flowinfo %d, scope_id %d",
3586
*tcp_server.socket.getsockname())
2471
3587
else: # IPv4
2472
logger.info("Now listening on address %r, port %d"
2473
% tcp_server.socket.getsockname())
2474
2475
#service.interface = tcp_server.socket.getsockname()[3]
2476
3588
logger.info("Now listening on address %r, port %d",
3589
*tcp_server.socket.getsockname())
3590
3591
# service.interface = tcp_server.socket.getsockname()[3]
3592
2477
3593
try:
2478
# From the Avahi example code
2479
try:
2480
service.activate()
2481
except dbus.exceptions.DBusException as error:
2482
logger.critical("DBusException: %s", error)
2483
cleanup()
2484
sys.exit(1)
2485
# End of Avahi example code
2486
2487
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2488
lambda *args, **kwargs:
2489
(tcp_server.handle_request
2490
(*args[2:], **kwargs) or True))
2491
3594
if zeroconf:
3595
# From the Avahi example code
3596
try:
3597
service.activate()
3598
except dbus.exceptions.DBusException as error:
3599
logger.critical("D-Bus Exception", exc_info=error)
3600
cleanup()
3601
sys.exit(1)
3602
# End of Avahi example code
3603
3604
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3605
lambda *args, **kwargs:
3606
(tcp_server.handle_request
3607
(*args[2:], **kwargs) or True))
3608
2492
3609
logger.debug("Starting main loop")
2493
3610
main_loop.run()
2494
3611
except AvahiError as error:
2495
logger.critical("AvahiError: %s", error)
3612
logger.critical("Avahi Error", exc_info=error)
2496
3613
cleanup()
2497
3614
sys.exit(1)
2498
3615
except KeyboardInterrupt:
2503
3620
# Must run before the D-Bus bus name gets deregistered
2504
3621
cleanup()
2505
3622
3623
2506
3624
if __name__ == '__main__':
2507
3625
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0