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- Committer: Teddy Hogeborn
- Date: 2019-08-18 04:14:31 UTC
- Revision ID: teddy@recompile.se-20190818041431-jgt8pizlzjvxalj0
Debian package: Client: Install the systemd sysusers.d file
* debian/mandos-client.dirs (usr/lib/sysusers.d): New.
* debian/mandos-client.dirs (usr/lib/sysusers.d): New.
- files added:
- bugs.xml
- debian/tests
- debian/upstream
- dracut-module
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
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# Mandos server - give out binary blobs to connecting clients.
5
#
5
#
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# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
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# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
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
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import dbus
70
82
import dbus.service
71
import gobject
72
import avahi
83
import gi
84
from gi.repository import GLib
73
85
from dbus.mainloop.glib import DBusGMainLoop
74
86
import ctypes
75
87
import ctypes.util
76
88
import xml.dom.minidom
77
89
import inspect
78
import GnuPGInterface
79
90
91
if sys.version_info.major == 2:
92
__metaclass__ = type
93
94
# Try to find the value of SO_BINDTODEVICE:
80
95
try:
96
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
97
# newer, and it is also the most natural place for it:
81
98
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
82
99
except AttributeError:
83
100
try:
101
# This is where SO_BINDTODEVICE was up to and including Python
102
# 2.6, and also 3.2:
84
103
from IN import SO_BINDTODEVICE
85
104
except ImportError:
86
SO_BINDTODEVICE = None
87
88
version = "1.4.1"
105
# In Python 2.7 it seems to have been removed entirely.
106
# Try running the C preprocessor:
107
try:
108
cc = subprocess.Popen(["cc", "--language=c", "-E",
109
"/dev/stdin"],
110
stdin=subprocess.PIPE,
111
stdout=subprocess.PIPE)
112
stdout = cc.communicate(
113
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
114
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
115
except (OSError, ValueError, IndexError):
116
# No value found
117
SO_BINDTODEVICE = None
118
119
if sys.version_info.major == 2:
120
str = unicode
121
122
if sys.version_info < (3, 2):
123
configparser.Configparser = configparser.SafeConfigParser
124
125
version = "1.8.7"
89
126
stored_state_file = "clients.pickle"
90
127
91
128
logger = logging.getLogger()
92
syslogger = (logging.handlers.SysLogHandler
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
129
syslogger = None
95
130
96
131
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
132
if_nametoindex = ctypes.cdll.LoadLibrary(
133
ctypes.util.find_library("c")).if_nametoindex
100
134
except (OSError, AttributeError):
135
101
136
def if_nametoindex(interface):
102
137
"Get an interface index the hard way, i.e. using fcntl()"
103
138
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
139
with contextlib.closing(socket.socket()) as s:
105
140
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
141
struct.pack(b"16s16x", interface))
142
interface_index = struct.unpack("I", ifreq[16:20])[0]
110
143
return interface_index
111
144
112
145
146
def copy_function(func):
147
"""Make a copy of a function"""
148
if sys.version_info.major == 2:
149
return types.FunctionType(func.func_code,
150
func.func_globals,
151
func.func_name,
152
func.func_defaults,
153
func.func_closure)
154
else:
155
return types.FunctionType(func.__code__,
156
func.__globals__,
157
func.__name__,
158
func.__defaults__,
159
func.__closure__)
160
161
113
162
def initlogger(debug, level=logging.WARNING):
114
163
"""init logger and add loglevel"""
115
164
165
global syslogger
166
syslogger = (logging.handlers.SysLogHandler(
167
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
168
address="/dev/log"))
116
169
syslogger.setFormatter(logging.Formatter
117
170
('Mandos [%(process)d]: %(levelname)s:'
118
171
' %(message)s'))
119
172
logger.addHandler(syslogger)
120
173
121
174
if debug:
122
175
console = logging.StreamHandler()
123
176
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
133
186
pass
134
187
135
188
136
class PGPEngine(object):
189
class PGPEngine:
137
190
"""A simple class for OpenPGP symmetric encryption & decryption"""
191
138
192
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
140
193
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
194
self.gpg = "gpg"
195
try:
196
output = subprocess.check_output(["gpgconf"])
197
for line in output.splitlines():
198
name, text, path = line.split(b":")
199
if name == "gpg":
200
self.gpg = path
201
break
202
except OSError as e:
203
if e.errno != errno.ENOENT:
204
raise
205
self.gnupgargs = ['--batch',
206
'--homedir', self.tempdir,
207
'--force-mdc',
208
'--quiet']
209
# Only GPG version 1 has the --no-use-agent option.
210
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
211
self.gnupgargs.append("--no-use-agent")
212
147
213
def __enter__(self):
148
214
return self
149
150
def __exit__ (self, exc_type, exc_value, traceback):
215
216
def __exit__(self, exc_type, exc_value, traceback):
151
217
self._cleanup()
152
218
return False
153
219
154
220
def __del__(self):
155
221
self._cleanup()
156
222
157
223
def _cleanup(self):
158
224
if self.tempdir is not None:
159
225
# Delete contents of tempdir
160
226
for root, dirs, files in os.walk(self.tempdir,
161
topdown = False):
227
topdown=False):
162
228
for filename in files:
163
229
os.remove(os.path.join(root, filename))
164
230
for dirname in dirs:
166
232
# Remove tempdir
167
233
os.rmdir(self.tempdir)
168
234
self.tempdir = None
169
235
170
236
def password_encode(self, password):
171
237
# Passphrase can not be empty and can not contain newlines or
172
238
# NUL bytes. So we prefix it and hex encode it.
173
return b"mandos" + binascii.hexlify(password)
174
239
encoded = b"mandos" + binascii.hexlify(password)
240
if len(encoded) > 2048:
241
# GnuPG can't handle long passwords, so encode differently
242
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
243
.replace(b"\n", b"\\n")
244
.replace(b"\0", b"\\x00"))
245
return encoded
246
175
247
def encrypt(self, data, password):
176
self.gnupg.passphrase = self.password_encode(password)
177
with open(os.devnull) as devnull:
178
try:
179
proc = self.gnupg.run(['--symmetric'],
180
create_fhs=['stdin', 'stdout'],
181
attach_fhs={'stderr': devnull})
182
with contextlib.closing(proc.handles['stdin']) as f:
183
f.write(data)
184
with contextlib.closing(proc.handles['stdout']) as f:
185
ciphertext = f.read()
186
proc.wait()
187
except IOError as e:
188
raise PGPError(e)
189
self.gnupg.passphrase = None
248
passphrase = self.password_encode(password)
249
with tempfile.NamedTemporaryFile(
250
dir=self.tempdir) as passfile:
251
passfile.write(passphrase)
252
passfile.flush()
253
proc = subprocess.Popen([self.gpg, '--symmetric',
254
'--passphrase-file',
255
passfile.name]
256
+ self.gnupgargs,
257
stdin=subprocess.PIPE,
258
stdout=subprocess.PIPE,
259
stderr=subprocess.PIPE)
260
ciphertext, err = proc.communicate(input=data)
261
if proc.returncode != 0:
262
raise PGPError(err)
190
263
return ciphertext
191
264
192
265
def decrypt(self, data, password):
193
self.gnupg.passphrase = self.password_encode(password)
194
with open(os.devnull) as devnull:
195
try:
196
proc = self.gnupg.run(['--decrypt'],
197
create_fhs=['stdin', 'stdout'],
198
attach_fhs={'stderr': devnull})
199
with contextlib.closing(proc.handles['stdin'] ) as f:
200
f.write(data)
201
with contextlib.closing(proc.handles['stdout']) as f:
202
decrypted_plaintext = f.read()
203
proc.wait()
204
except IOError as e:
205
raise PGPError(e)
206
self.gnupg.passphrase = None
266
passphrase = self.password_encode(password)
267
with tempfile.NamedTemporaryFile(
268
dir=self.tempdir) as passfile:
269
passfile.write(passphrase)
270
passfile.flush()
271
proc = subprocess.Popen([self.gpg, '--decrypt',
272
'--passphrase-file',
273
passfile.name]
274
+ self.gnupgargs,
275
stdin=subprocess.PIPE,
276
stdout=subprocess.PIPE,
277
stderr=subprocess.PIPE)
278
decrypted_plaintext, err = proc.communicate(input=data)
279
if proc.returncode != 0:
280
raise PGPError(err)
207
281
return decrypted_plaintext
208
282
209
283
284
# Pretend that we have an Avahi module
285
class avahi:
286
"""This isn't so much a class as it is a module-like namespace."""
287
IF_UNSPEC = -1 # avahi-common/address.h
288
PROTO_UNSPEC = -1 # avahi-common/address.h
289
PROTO_INET = 0 # avahi-common/address.h
290
PROTO_INET6 = 1 # avahi-common/address.h
291
DBUS_NAME = "org.freedesktop.Avahi"
292
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
293
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
294
DBUS_PATH_SERVER = "/"
295
296
@staticmethod
297
def string_array_to_txt_array(t):
298
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
299
for s in t), signature="ay")
300
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
301
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
302
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
303
SERVER_INVALID = 0 # avahi-common/defs.h
304
SERVER_REGISTERING = 1 # avahi-common/defs.h
305
SERVER_RUNNING = 2 # avahi-common/defs.h
306
SERVER_COLLISION = 3 # avahi-common/defs.h
307
SERVER_FAILURE = 4 # avahi-common/defs.h
308
210
309
211
310
class AvahiError(Exception):
212
311
def __init__(self, value, *args, **kwargs):
213
312
self.value = value
214
super(AvahiError, self).__init__(value, *args, **kwargs)
215
def __unicode__(self):
216
return unicode(repr(self.value))
313
return super(AvahiError, self).__init__(value, *args,
314
**kwargs)
315
217
316
218
317
class AvahiServiceError(AvahiError):
219
318
pass
220
319
320
221
321
class AvahiGroupError(AvahiError):
222
322
pass
223
323
224
324
225
class AvahiService(object):
325
class AvahiService:
226
326
"""An Avahi (Zeroconf) service.
227
327
228
328
Attributes:
229
329
interface: integer; avahi.IF_UNSPEC or an interface index.
230
330
Used to optionally bind to the specified interface.
231
331
name: string; Example: 'Mandos'
232
332
type: string; Example: '_mandos._tcp'.
233
See <http://www.dns-sd.org/ServiceTypes.html>
333
See <https://www.iana.org/assignments/service-names-port-numbers>
234
334
port: integer; what port to announce
235
335
TXT: list of strings; TXT record for the service
236
336
domain: string; Domain to publish on, default to .local if empty.
242
342
server: D-Bus Server
243
343
bus: dbus.SystemBus()
244
344
"""
245
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
246
servicetype = None, port = None, TXT = None,
247
domain = "", host = "", max_renames = 32768,
248
protocol = avahi.PROTO_UNSPEC, bus = None):
345
346
def __init__(self,
347
interface=avahi.IF_UNSPEC,
348
name=None,
349
servicetype=None,
350
port=None,
351
TXT=None,
352
domain="",
353
host="",
354
max_renames=32768,
355
protocol=avahi.PROTO_UNSPEC,
356
bus=None):
249
357
self.interface = interface
250
358
self.name = name
251
359
self.type = servicetype
260
368
self.server = None
261
369
self.bus = bus
262
370
self.entry_group_state_changed_match = None
263
def rename(self):
371
372
def rename(self, remove=True):
264
373
"""Derived from the Avahi example code"""
265
374
if self.rename_count >= self.max_renames:
266
375
logger.critical("No suitable Zeroconf service name found"
267
376
" after %i retries, exiting.",
268
377
self.rename_count)
269
378
raise AvahiServiceError("Too many renames")
270
self.name = unicode(self.server
271
.GetAlternativeServiceName(self.name))
379
self.name = str(
380
self.server.GetAlternativeServiceName(self.name))
381
self.rename_count += 1
272
382
logger.info("Changing Zeroconf service name to %r ...",
273
383
self.name)
274
self.remove()
384
if remove:
385
self.remove()
275
386
try:
276
387
self.add()
277
388
except dbus.exceptions.DBusException as error:
278
logger.critical("DBusException: %s", error)
279
self.cleanup()
280
os._exit(1)
281
self.rename_count += 1
389
if (error.get_dbus_name()
390
== "org.freedesktop.Avahi.CollisionError"):
391
logger.info("Local Zeroconf service name collision.")
392
return self.rename(remove=False)
393
else:
394
logger.critical("D-Bus Exception", exc_info=error)
395
self.cleanup()
396
os._exit(1)
397
282
398
def remove(self):
283
399
"""Derived from the Avahi example code"""
284
400
if self.entry_group_state_changed_match is not None:
286
402
self.entry_group_state_changed_match = None
287
403
if self.group is not None:
288
404
self.group.Reset()
405
289
406
def add(self):
290
407
"""Derived from the Avahi example code"""
291
408
self.remove()
308
425
dbus.UInt16(self.port),
309
426
avahi.string_array_to_txt_array(self.TXT))
310
427
self.group.Commit()
428
311
429
def entry_group_state_changed(self, state, error):
312
430
"""Derived from the Avahi example code"""
313
431
logger.debug("Avahi entry group state change: %i", state)
314
432
315
433
if state == avahi.ENTRY_GROUP_ESTABLISHED:
316
434
logger.debug("Zeroconf service established.")
317
435
elif state == avahi.ENTRY_GROUP_COLLISION:
319
437
self.rename()
320
438
elif state == avahi.ENTRY_GROUP_FAILURE:
321
439
logger.critical("Avahi: Error in group state changed %s",
322
unicode(error))
323
raise AvahiGroupError("State changed: %s"
324
% unicode(error))
440
str(error))
441
raise AvahiGroupError("State changed: {!s}".format(error))
442
325
443
def cleanup(self):
326
444
"""Derived from the Avahi example code"""
327
445
if self.group is not None:
332
450
pass
333
451
self.group = None
334
452
self.remove()
453
335
454
def server_state_changed(self, state, error=None):
336
455
"""Derived from the Avahi example code"""
337
456
logger.debug("Avahi server state change: %i", state)
338
bad_states = { avahi.SERVER_INVALID:
339
"Zeroconf server invalid",
340
avahi.SERVER_REGISTERING: None,
341
avahi.SERVER_COLLISION:
342
"Zeroconf server name collision",
343
avahi.SERVER_FAILURE:
344
"Zeroconf server failure" }
457
bad_states = {
458
avahi.SERVER_INVALID: "Zeroconf server invalid",
459
avahi.SERVER_REGISTERING: None,
460
avahi.SERVER_COLLISION: "Zeroconf server name collision",
461
avahi.SERVER_FAILURE: "Zeroconf server failure",
462
}
345
463
if state in bad_states:
346
464
if bad_states[state] is not None:
347
465
if error is None:
350
468
logger.error(bad_states[state] + ": %r", error)
351
469
self.cleanup()
352
470
elif state == avahi.SERVER_RUNNING:
353
self.add()
471
try:
472
self.add()
473
except dbus.exceptions.DBusException as error:
474
if (error.get_dbus_name()
475
== "org.freedesktop.Avahi.CollisionError"):
476
logger.info("Local Zeroconf service name"
477
" collision.")
478
return self.rename(remove=False)
479
else:
480
logger.critical("D-Bus Exception", exc_info=error)
481
self.cleanup()
482
os._exit(1)
354
483
else:
355
484
if error is None:
356
485
logger.debug("Unknown state: %r", state)
357
486
else:
358
487
logger.debug("Unknown state: %r: %r", state, error)
488
359
489
def activate(self):
360
490
"""Derived from the Avahi example code"""
361
491
if self.server is None:
365
495
follow_name_owner_changes=True),
366
496
avahi.DBUS_INTERFACE_SERVER)
367
497
self.server.connect_to_signal("StateChanged",
368
self.server_state_changed)
498
self.server_state_changed)
369
499
self.server_state_changed(self.server.GetState())
370
500
501
371
502
class AvahiServiceToSyslog(AvahiService):
372
def rename(self):
503
def rename(self, *args, **kwargs):
373
504
"""Add the new name to the syslog messages"""
374
ret = AvahiService.rename(self)
375
syslogger.setFormatter(logging.Formatter
376
('Mandos (%s) [%%(process)d]:'
377
' %%(levelname)s: %%(message)s'
378
% self.name))
505
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
506
syslogger.setFormatter(logging.Formatter(
507
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
508
.format(self.name)))
379
509
return ret
380
510
381
def timedelta_to_milliseconds(td):
382
"Convert a datetime.timedelta() to milliseconds"
383
return ((td.days * 24 * 60 * 60 * 1000)
384
+ (td.seconds * 1000)
385
+ (td.microseconds // 1000))
386
387
class Client(object):
511
512
# Pretend that we have a GnuTLS module
513
class gnutls:
514
"""This isn't so much a class as it is a module-like namespace."""
515
516
library = ctypes.util.find_library("gnutls")
517
if library is None:
518
library = ctypes.util.find_library("gnutls-deb0")
519
_library = ctypes.cdll.LoadLibrary(library)
520
del library
521
522
# Unless otherwise indicated, the constants and types below are
523
# all from the gnutls/gnutls.h C header file.
524
525
# Constants
526
E_SUCCESS = 0
527
E_INTERRUPTED = -52
528
E_AGAIN = -28
529
CRT_OPENPGP = 2
530
CRT_RAWPK = 3
531
CLIENT = 2
532
SHUT_RDWR = 0
533
CRD_CERTIFICATE = 1
534
E_NO_CERTIFICATE_FOUND = -49
535
X509_FMT_DER = 0
536
NO_TICKETS = 1<<10
537
ENABLE_RAWPK = 1<<18
538
CTYPE_PEERS = 3
539
KEYID_USE_SHA256 = 1 # gnutls/x509.h
540
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
541
542
# Types
543
class session_int(ctypes.Structure):
544
_fields_ = []
545
session_t = ctypes.POINTER(session_int)
546
547
class certificate_credentials_st(ctypes.Structure):
548
_fields_ = []
549
certificate_credentials_t = ctypes.POINTER(
550
certificate_credentials_st)
551
certificate_type_t = ctypes.c_int
552
553
class datum_t(ctypes.Structure):
554
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
555
('size', ctypes.c_uint)]
556
557
class openpgp_crt_int(ctypes.Structure):
558
_fields_ = []
559
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
560
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
561
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
562
credentials_type_t = ctypes.c_int
563
transport_ptr_t = ctypes.c_void_p
564
close_request_t = ctypes.c_int
565
566
# Exceptions
567
class Error(Exception):
568
def __init__(self, message=None, code=None, args=()):
569
# Default usage is by a message string, but if a return
570
# code is passed, convert it to a string with
571
# gnutls.strerror()
572
self.code = code
573
if message is None and code is not None:
574
message = gnutls.strerror(code)
575
return super(gnutls.Error, self).__init__(
576
message, *args)
577
578
class CertificateSecurityError(Error):
579
pass
580
581
# Classes
582
class Credentials:
583
def __init__(self):
584
self._c_object = gnutls.certificate_credentials_t()
585
gnutls.certificate_allocate_credentials(
586
ctypes.byref(self._c_object))
587
self.type = gnutls.CRD_CERTIFICATE
588
589
def __del__(self):
590
gnutls.certificate_free_credentials(self._c_object)
591
592
class ClientSession:
593
def __init__(self, socket, credentials=None):
594
self._c_object = gnutls.session_t()
595
gnutls_flags = gnutls.CLIENT
596
if gnutls.check_version(b"3.5.6"):
597
gnutls_flags |= gnutls.NO_TICKETS
598
if gnutls.has_rawpk:
599
gnutls_flags |= gnutls.ENABLE_RAWPK
600
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
601
del gnutls_flags
602
gnutls.set_default_priority(self._c_object)
603
gnutls.transport_set_ptr(self._c_object, socket.fileno())
604
gnutls.handshake_set_private_extensions(self._c_object,
605
True)
606
self.socket = socket
607
if credentials is None:
608
credentials = gnutls.Credentials()
609
gnutls.credentials_set(self._c_object, credentials.type,
610
ctypes.cast(credentials._c_object,
611
ctypes.c_void_p))
612
self.credentials = credentials
613
614
def __del__(self):
615
gnutls.deinit(self._c_object)
616
617
def handshake(self):
618
return gnutls.handshake(self._c_object)
619
620
def send(self, data):
621
data = bytes(data)
622
data_len = len(data)
623
while data_len > 0:
624
data_len -= gnutls.record_send(self._c_object,
625
data[-data_len:],
626
data_len)
627
628
def bye(self):
629
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
630
631
# Error handling functions
632
def _error_code(result):
633
"""A function to raise exceptions on errors, suitable
634
for the 'restype' attribute on ctypes functions"""
635
if result >= 0:
636
return result
637
if result == gnutls.E_NO_CERTIFICATE_FOUND:
638
raise gnutls.CertificateSecurityError(code=result)
639
raise gnutls.Error(code=result)
640
641
def _retry_on_error(result, func, arguments):
642
"""A function to retry on some errors, suitable
643
for the 'errcheck' attribute on ctypes functions"""
644
while result < 0:
645
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
646
return _error_code(result)
647
result = func(*arguments)
648
return result
649
650
# Unless otherwise indicated, the function declarations below are
651
# all from the gnutls/gnutls.h C header file.
652
653
# Functions
654
priority_set_direct = _library.gnutls_priority_set_direct
655
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
656
ctypes.POINTER(ctypes.c_char_p)]
657
priority_set_direct.restype = _error_code
658
659
init = _library.gnutls_init
660
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
661
init.restype = _error_code
662
663
set_default_priority = _library.gnutls_set_default_priority
664
set_default_priority.argtypes = [session_t]
665
set_default_priority.restype = _error_code
666
667
record_send = _library.gnutls_record_send
668
record_send.argtypes = [session_t, ctypes.c_void_p,
669
ctypes.c_size_t]
670
record_send.restype = ctypes.c_ssize_t
671
record_send.errcheck = _retry_on_error
672
673
certificate_allocate_credentials = (
674
_library.gnutls_certificate_allocate_credentials)
675
certificate_allocate_credentials.argtypes = [
676
ctypes.POINTER(certificate_credentials_t)]
677
certificate_allocate_credentials.restype = _error_code
678
679
certificate_free_credentials = (
680
_library.gnutls_certificate_free_credentials)
681
certificate_free_credentials.argtypes = [
682
certificate_credentials_t]
683
certificate_free_credentials.restype = None
684
685
handshake_set_private_extensions = (
686
_library.gnutls_handshake_set_private_extensions)
687
handshake_set_private_extensions.argtypes = [session_t,
688
ctypes.c_int]
689
handshake_set_private_extensions.restype = None
690
691
credentials_set = _library.gnutls_credentials_set
692
credentials_set.argtypes = [session_t, credentials_type_t,
693
ctypes.c_void_p]
694
credentials_set.restype = _error_code
695
696
strerror = _library.gnutls_strerror
697
strerror.argtypes = [ctypes.c_int]
698
strerror.restype = ctypes.c_char_p
699
700
certificate_type_get = _library.gnutls_certificate_type_get
701
certificate_type_get.argtypes = [session_t]
702
certificate_type_get.restype = _error_code
703
704
certificate_get_peers = _library.gnutls_certificate_get_peers
705
certificate_get_peers.argtypes = [session_t,
706
ctypes.POINTER(ctypes.c_uint)]
707
certificate_get_peers.restype = ctypes.POINTER(datum_t)
708
709
global_set_log_level = _library.gnutls_global_set_log_level
710
global_set_log_level.argtypes = [ctypes.c_int]
711
global_set_log_level.restype = None
712
713
global_set_log_function = _library.gnutls_global_set_log_function
714
global_set_log_function.argtypes = [log_func]
715
global_set_log_function.restype = None
716
717
deinit = _library.gnutls_deinit
718
deinit.argtypes = [session_t]
719
deinit.restype = None
720
721
handshake = _library.gnutls_handshake
722
handshake.argtypes = [session_t]
723
handshake.restype = _error_code
724
handshake.errcheck = _retry_on_error
725
726
transport_set_ptr = _library.gnutls_transport_set_ptr
727
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
728
transport_set_ptr.restype = None
729
730
bye = _library.gnutls_bye
731
bye.argtypes = [session_t, close_request_t]
732
bye.restype = _error_code
733
bye.errcheck = _retry_on_error
734
735
check_version = _library.gnutls_check_version
736
check_version.argtypes = [ctypes.c_char_p]
737
check_version.restype = ctypes.c_char_p
738
739
_need_version = b"3.3.0"
740
if check_version(_need_version) is None:
741
raise self.Error("Needs GnuTLS {} or later"
742
.format(_need_version))
743
744
_tls_rawpk_version = b"3.6.6"
745
has_rawpk = bool(check_version(_tls_rawpk_version))
746
747
if has_rawpk:
748
# Types
749
class pubkey_st(ctypes.Structure):
750
_fields = []
751
pubkey_t = ctypes.POINTER(pubkey_st)
752
753
x509_crt_fmt_t = ctypes.c_int
754
755
# All the function declarations below are from gnutls/abstract.h
756
pubkey_init = _library.gnutls_pubkey_init
757
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
758
pubkey_init.restype = _error_code
759
760
pubkey_import = _library.gnutls_pubkey_import
761
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
762
x509_crt_fmt_t]
763
pubkey_import.restype = _error_code
764
765
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
766
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
767
ctypes.POINTER(ctypes.c_ubyte),
768
ctypes.POINTER(ctypes.c_size_t)]
769
pubkey_get_key_id.restype = _error_code
770
771
pubkey_deinit = _library.gnutls_pubkey_deinit
772
pubkey_deinit.argtypes = [pubkey_t]
773
pubkey_deinit.restype = None
774
else:
775
# All the function declarations below are from gnutls/openpgp.h
776
777
openpgp_crt_init = _library.gnutls_openpgp_crt_init
778
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
779
openpgp_crt_init.restype = _error_code
780
781
openpgp_crt_import = _library.gnutls_openpgp_crt_import
782
openpgp_crt_import.argtypes = [openpgp_crt_t,
783
ctypes.POINTER(datum_t),
784
openpgp_crt_fmt_t]
785
openpgp_crt_import.restype = _error_code
786
787
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
788
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
789
ctypes.POINTER(ctypes.c_uint)]
790
openpgp_crt_verify_self.restype = _error_code
791
792
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
793
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
794
openpgp_crt_deinit.restype = None
795
796
openpgp_crt_get_fingerprint = (
797
_library.gnutls_openpgp_crt_get_fingerprint)
798
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
799
ctypes.c_void_p,
800
ctypes.POINTER(
801
ctypes.c_size_t)]
802
openpgp_crt_get_fingerprint.restype = _error_code
803
804
if check_version(b"3.6.4"):
805
certificate_type_get2 = _library.gnutls_certificate_type_get2
806
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
807
certificate_type_get2.restype = _error_code
808
809
# Remove non-public functions
810
del _error_code, _retry_on_error
811
812
813
def call_pipe(connection, # : multiprocessing.Connection
814
func, *args, **kwargs):
815
"""This function is meant to be called by multiprocessing.Process
816
817
This function runs func(*args, **kwargs), and writes the resulting
818
return value on the provided multiprocessing.Connection.
819
"""
820
connection.send(func(*args, **kwargs))
821
connection.close()
822
823
824
class Client:
388
825
"""A representation of a client host served by this server.
389
826
390
827
Attributes:
391
828
approved: bool(); 'None' if not yet approved/disapproved
392
829
approval_delay: datetime.timedelta(); Time to wait for approval
393
830
approval_duration: datetime.timedelta(); Duration of one approval
394
checker: subprocess.Popen(); a running checker process used
395
to see if the client lives.
396
'None' if no process is running.
397
checker_callback_tag: a gobject event source tag, or None
831
checker: multiprocessing.Process(); a running checker process used
832
to see if the client lives. 'None' if no process is
833
running.
834
checker_callback_tag: a GLib event source tag, or None
398
835
checker_command: string; External command which is run to check
399
836
if client lives. %() expansions are done at
400
837
runtime with vars(self) as dict, so that for
401
838
instance %(name)s can be used in the command.
402
checker_initiator_tag: a gobject event source tag, or None
839
checker_initiator_tag: a GLib event source tag, or None
403
840
created: datetime.datetime(); (UTC) object creation
404
841
client_structure: Object describing what attributes a client has
405
842
and is used for storing the client at exit
406
843
current_checker_command: string; current running checker_command
407
disable_initiator_tag: a gobject event source tag, or None
844
disable_initiator_tag: a GLib event source tag, or None
408
845
enabled: bool()
409
846
fingerprint: string (40 or 32 hexadecimal digits); used to
410
uniquely identify the client
847
uniquely identify an OpenPGP client
848
key_id: string (64 hexadecimal digits); used to uniquely identify
849
a client using raw public keys
411
850
host: string; available for use by the checker command
412
851
interval: datetime.timedelta(); How often to start a new checker
413
852
last_approval_request: datetime.datetime(); (UTC) or None
414
853
last_checked_ok: datetime.datetime(); (UTC) or None
415
854
last_checker_status: integer between 0 and 255 reflecting exit
416
855
status of last checker. -1 reflects crashed
417
checker, or None.
856
checker, -2 means no checker completed yet.
857
last_checker_signal: The signal which killed the last checker, if
858
last_checker_status is -1
418
859
last_enabled: datetime.datetime(); (UTC) or None
419
860
name: string; from the config file, used in log messages and
420
861
D-Bus identifiers
421
862
secret: bytestring; sent verbatim (over TLS) to client
422
863
timeout: datetime.timedelta(); How long from last_checked_ok
423
864
until this client is disabled
424
extended_timeout: extra long timeout when password has been sent
865
extended_timeout: extra long timeout when secret has been sent
425
866
runtime_expansions: Allowed attributes for runtime expansion.
426
867
expires: datetime.datetime(); time (UTC) when a client will be
427
868
disabled, or None
869
server_settings: The server_settings dict from main()
428
870
"""
429
871
430
872
runtime_expansions = ("approval_delay", "approval_duration",
431
"created", "enabled", "fingerprint",
432
"host", "interval", "last_checked_ok",
873
"created", "enabled", "expires", "key_id",
874
"fingerprint", "host", "interval",
875
"last_approval_request", "last_checked_ok",
433
876
"last_enabled", "name", "timeout")
434
client_defaults = { "timeout": "5m",
435
"extended_timeout": "15m",
436
"interval": "2m",
437
"checker": "fping -q -- %%(host)s",
438
"host": "",
439
"approval_delay": "0s",
440
"approval_duration": "1s",
441
"approved_by_default": "True",
442
"enabled": "True",
443
}
444
445
def timeout_milliseconds(self):
446
"Return the 'timeout' attribute in milliseconds"
447
return timedelta_to_milliseconds(self.timeout)
448
449
def extended_timeout_milliseconds(self):
450
"Return the 'extended_timeout' attribute in milliseconds"
451
return timedelta_to_milliseconds(self.extended_timeout)
452
453
def interval_milliseconds(self):
454
"Return the 'interval' attribute in milliseconds"
455
return timedelta_to_milliseconds(self.interval)
456
457
def approval_delay_milliseconds(self):
458
return timedelta_to_milliseconds(self.approval_delay)
877
client_defaults = {
878
"timeout": "PT5M",
879
"extended_timeout": "PT15M",
880
"interval": "PT2M",
881
"checker": "fping -q -- %%(host)s",
882
"host": "",
883
"approval_delay": "PT0S",
884
"approval_duration": "PT1S",
885
"approved_by_default": "True",
886
"enabled": "True",
887
}
459
888
460
889
@staticmethod
461
890
def config_parser(config):
462
""" Construct a new dict of client settings of this form:
891
"""Construct a new dict of client settings of this form:
463
892
{ client_name: {setting_name: value, ...}, ...}
464
with exceptions for any special settings as defined above"""
893
with exceptions for any special settings as defined above.
894
NOTE: Must be a pure function. Must return the same result
895
value given the same arguments.
896
"""
465
897
settings = {}
466
898
for client_name in config.sections():
467
899
section = dict(config.items(client_name))
468
900
client = settings[client_name] = {}
469
901
470
902
client["host"] = section["host"]
471
903
# Reformat values from string types to Python types
472
904
client["approved_by_default"] = config.getboolean(
473
905
client_name, "approved_by_default")
474
client["enabled"] = config.getboolean(client_name, "enabled")
475
906
client["enabled"] = config.getboolean(client_name,
907
"enabled")
908
909
# Uppercase and remove spaces from key_id and fingerprint
910
# for later comparison purposes with return value from the
911
# key_id() and fingerprint() functions
912
client["key_id"] = (section.get("key_id", "").upper()
913
.replace(" ", ""))
476
914
client["fingerprint"] = (section["fingerprint"].upper()
477
915
.replace(" ", ""))
478
916
if "secret" in section:
479
client["secret"] = section["secret"].decode("base64")
917
client["secret"] = codecs.decode(section["secret"]
918
.encode("utf-8"),
919
"base64")
480
920
elif "secfile" in section:
481
921
with open(os.path.expanduser(os.path.expandvars
482
922
(section["secfile"])),
483
923
"rb") as secfile:
484
924
client["secret"] = secfile.read()
485
925
else:
486
raise TypeError("No secret or secfile for section %s"
487
% section)
926
raise TypeError("No secret or secfile for section {}"
927
.format(section))
488
928
client["timeout"] = string_to_delta(section["timeout"])
489
929
client["extended_timeout"] = string_to_delta(
490
930
section["extended_timeout"])
496
936
client["checker_command"] = section["checker"]
497
937
client["last_approval_request"] = None
498
938
client["last_checked_ok"] = None
499
client["last_checker_status"] = None
500
if client["enabled"]:
501
client["last_enabled"] = datetime.datetime.utcnow()
502
client["expires"] = (datetime.datetime.utcnow()
503
+ client["timeout"])
504
else:
505
client["last_enabled"] = None
506
client["expires"] = None
939
client["last_checker_status"] = -2
507
940
508
941
return settings
509
510
511
def __init__(self, settings, name = None):
512
"""Note: the 'checker' key in 'config' sets the
513
'checker_command' attribute and *not* the 'checker'
514
attribute."""
942
943
def __init__(self, settings, name=None, server_settings=None):
515
944
self.name = name
945
if server_settings is None:
946
server_settings = {}
947
self.server_settings = server_settings
516
948
# adding all client settings
517
for setting, value in settings.iteritems():
949
for setting, value in settings.items():
518
950
setattr(self, setting, value)
519
951
952
if self.enabled:
953
if not hasattr(self, "last_enabled"):
954
self.last_enabled = datetime.datetime.utcnow()
955
if not hasattr(self, "expires"):
956
self.expires = (datetime.datetime.utcnow()
957
+ self.timeout)
958
else:
959
self.last_enabled = None
960
self.expires = None
961
520
962
logger.debug("Creating client %r", self.name)
521
# Uppercase and remove spaces from fingerprint for later
522
# comparison purposes with return value from the fingerprint()
523
# function
963
logger.debug(" Key ID: %s", self.key_id)
524
964
logger.debug(" Fingerprint: %s", self.fingerprint)
525
self.created = settings.get("created", datetime.datetime.utcnow())
965
self.created = settings.get("created",
966
datetime.datetime.utcnow())
526
967
527
968
# attributes specific for this server instance
528
969
self.checker = None
532
973
self.current_checker_command = None
533
974
self.approved = None
534
975
self.approvals_pending = 0
535
self.changedstate = (multiprocessing_manager
536
.Condition(multiprocessing_manager
537
.Lock()))
538
self.client_structure = [attr for attr in
539
self.__dict__.iterkeys()
976
self.changedstate = multiprocessing_manager.Condition(
977
multiprocessing_manager.Lock())
978
self.client_structure = [attr
979
for attr in self.__dict__.keys()
540
980
if not attr.startswith("_")]
541
981
self.client_structure.append("client_structure")
542
543
for name, t in inspect.getmembers(type(self),
544
lambda obj:
545
isinstance(obj,
546
property)):
982
983
for name, t in inspect.getmembers(
984
type(self), lambda obj: isinstance(obj, property)):
547
985
if not name.startswith("_"):
548
986
self.client_structure.append(name)
549
987
550
988
# Send notice to process children that client state has changed
551
989
def send_changedstate(self):
552
990
with self.changedstate:
553
991
self.changedstate.notify_all()
554
992
555
993
def enable(self):
556
994
"""Start this client's checker and timeout hooks"""
557
995
if getattr(self, "enabled", False):
558
996
# Already enabled
559
997
return
560
self.send_changedstate()
561
998
self.expires = datetime.datetime.utcnow() + self.timeout
562
999
self.enabled = True
563
1000
self.last_enabled = datetime.datetime.utcnow()
564
1001
self.init_checker()
565
1002
self.send_changedstate()
1003
566
1004
def disable(self, quiet=True):
567
1005
"""Disable this client."""
568
1006
if not getattr(self, "enabled", False):
569
1007
return False
570
1008
if not quiet:
571
self.send_changedstate()
572
if not quiet:
573
1009
logger.info("Disabling client %s", self.name)
574
if getattr(self, "disable_initiator_tag", False):
575
gobject.source_remove(self.disable_initiator_tag)
1010
if getattr(self, "disable_initiator_tag", None) is not None:
1011
GLib.source_remove(self.disable_initiator_tag)
576
1012
self.disable_initiator_tag = None
577
1013
self.expires = None
578
if getattr(self, "checker_initiator_tag", False):
579
gobject.source_remove(self.checker_initiator_tag)
1014
if getattr(self, "checker_initiator_tag", None) is not None:
1015
GLib.source_remove(self.checker_initiator_tag)
580
1016
self.checker_initiator_tag = None
581
1017
self.stop_checker()
582
1018
self.enabled = False
583
# Do not run this again if called by a gobject.timeout_add
1019
if not quiet:
1020
self.send_changedstate()
1021
# Do not run this again if called by a GLib.timeout_add
584
1022
return False
585
1023
586
1024
def __del__(self):
587
1025
self.disable()
588
1026
589
1027
def init_checker(self):
590
1028
# Schedule a new checker to be started an 'interval' from now,
591
1029
# and every interval from then on.
592
self.checker_initiator_tag = (gobject.timeout_add
593
(self.interval_milliseconds(),
594
self.start_checker))
1030
if self.checker_initiator_tag is not None:
1031
GLib.source_remove(self.checker_initiator_tag)
1032
self.checker_initiator_tag = GLib.timeout_add(
1033
int(self.interval.total_seconds() * 1000),
1034
self.start_checker)
595
1035
# Schedule a disable() when 'timeout' has passed
596
self.disable_initiator_tag = (gobject.timeout_add
597
(self.timeout_milliseconds(),
598
self.disable))
1036
if self.disable_initiator_tag is not None:
1037
GLib.source_remove(self.disable_initiator_tag)
1038
self.disable_initiator_tag = GLib.timeout_add(
1039
int(self.timeout.total_seconds() * 1000), self.disable)
599
1040
# Also start a new checker *right now*.
600
1041
self.start_checker()
601
602
def checker_callback(self, pid, condition, command):
1042
1043
def checker_callback(self, source, condition, connection,
1044
command):
603
1045
"""The checker has completed, so take appropriate actions."""
1046
# Read return code from connection (see call_pipe)
1047
returncode = connection.recv()
1048
connection.close()
1049
self.checker.join()
604
1050
self.checker_callback_tag = None
605
1051
self.checker = None
606
if os.WIFEXITED(condition):
607
self.last_checker_status = os.WEXITSTATUS(condition)
1052
1053
if returncode >= 0:
1054
self.last_checker_status = returncode
1055
self.last_checker_signal = None
608
1056
if self.last_checker_status == 0:
609
1057
logger.info("Checker for %(name)s succeeded",
610
1058
vars(self))
611
1059
self.checked_ok()
612
1060
else:
613
logger.info("Checker for %(name)s failed",
614
vars(self))
1061
logger.info("Checker for %(name)s failed", vars(self))
615
1062
else:
616
1063
self.last_checker_status = -1
1064
self.last_checker_signal = -returncode
617
1065
logger.warning("Checker for %(name)s crashed?",
618
1066
vars(self))
619
620
def checked_ok(self, timeout=None):
621
"""Bump up the timeout for this client.
622
623
This should only be called when the client has been seen,
624
alive and well.
625
"""
1067
return False
1068
1069
def checked_ok(self):
1070
"""Assert that the client has been seen, alive and well."""
1071
self.last_checked_ok = datetime.datetime.utcnow()
1072
self.last_checker_status = 0
1073
self.last_checker_signal = None
1074
self.bump_timeout()
1075
1076
def bump_timeout(self, timeout=None):
1077
"""Bump up the timeout for this client."""
626
1078
if timeout is None:
627
1079
timeout = self.timeout
628
self.last_checked_ok = datetime.datetime.utcnow()
629
1080
if self.disable_initiator_tag is not None:
630
gobject.source_remove(self.disable_initiator_tag)
1081
GLib.source_remove(self.disable_initiator_tag)
1082
self.disable_initiator_tag = None
631
1083
if getattr(self, "enabled", False):
632
self.disable_initiator_tag = (gobject.timeout_add
633
(timedelta_to_milliseconds
634
(timeout), self.disable))
1084
self.disable_initiator_tag = GLib.timeout_add(
1085
int(timeout.total_seconds() * 1000), self.disable)
635
1086
self.expires = datetime.datetime.utcnow() + timeout
636
1087
637
1088
def need_approval(self):
638
1089
self.last_approval_request = datetime.datetime.utcnow()
639
1090
640
1091
def start_checker(self):
641
1092
"""Start a new checker subprocess if one is not running.
642
1093
643
1094
If a checker already exists, leave it running and do
644
1095
nothing."""
645
1096
# The reason for not killing a running checker is that if we
646
# did that, then if a checker (for some reason) started
647
# running slowly and taking more than 'interval' time, the
648
# client would inevitably timeout, since no checker would get
649
# a chance to run to completion. If we instead leave running
1097
# did that, and if a checker (for some reason) started running
1098
# slowly and taking more than 'interval' time, then the client
1099
# would inevitably timeout, since no checker would get a
1100
# chance to run to completion. If we instead leave running
650
1101
# checkers alone, the checker would have to take more time
651
1102
# than 'timeout' for the client to be disabled, which is as it
652
1103
# should be.
653
654
# If a checker exists, make sure it is not a zombie
655
try:
656
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
657
except (AttributeError, OSError) as error:
658
if (isinstance(error, OSError)
659
and error.errno != errno.ECHILD):
660
raise error
661
else:
662
if pid:
663
logger.warning("Checker was a zombie")
664
gobject.source_remove(self.checker_callback_tag)
665
self.checker_callback(pid, status,
666
self.current_checker_command)
1104
1105
if self.checker is not None and not self.checker.is_alive():
1106
logger.warning("Checker was not alive; joining")
1107
self.checker.join()
1108
self.checker = None
667
1109
# Start a new checker if needed
668
1110
if self.checker is None:
1111
# Escape attributes for the shell
1112
escaped_attrs = {
1113
attr: re.escape(str(getattr(self, attr)))
1114
for attr in self.runtime_expansions}
669
1115
try:
670
# In case checker_command has exactly one % operator
671
command = self.checker_command % self.host
672
except TypeError:
673
# Escape attributes for the shell
674
escaped_attrs = dict(
675
(attr,
676
re.escape(unicode(str(getattr(self, attr, "")),
677
errors=
678
'replace')))
679
for attr in
680
self.runtime_expansions)
681
682
try:
683
command = self.checker_command % escaped_attrs
684
except TypeError as error:
685
logger.error('Could not format string "%s":'
686
' %s', self.checker_command, error)
687
return True # Try again later
1116
command = self.checker_command % escaped_attrs
1117
except TypeError as error:
1118
logger.error('Could not format string "%s"',
1119
self.checker_command,
1120
exc_info=error)
1121
return True # Try again later
688
1122
self.current_checker_command = command
689
try:
690
logger.info("Starting checker %r for %s",
691
command, self.name)
692
# We don't need to redirect stdout and stderr, since
693
# in normal mode, that is already done by daemon(),
694
# and in debug mode we don't want to. (Stdin is
695
# always replaced by /dev/null.)
696
self.checker = subprocess.Popen(command,
697
close_fds=True,
698
shell=True, cwd="/")
699
self.checker_callback_tag = (gobject.child_watch_add
700
(self.checker.pid,
701
self.checker_callback,
702
data=command))
703
# The checker may have completed before the gobject
704
# watch was added. Check for this.
705
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
706
if pid:
707
gobject.source_remove(self.checker_callback_tag)
708
self.checker_callback(pid, status, command)
709
except OSError as error:
710
logger.error("Failed to start subprocess: %s",
711
error)
712
# Re-run this periodically if run by gobject.timeout_add
1123
logger.info("Starting checker %r for %s", command,
1124
self.name)
1125
# We don't need to redirect stdout and stderr, since
1126
# in normal mode, that is already done by daemon(),
1127
# and in debug mode we don't want to. (Stdin is
1128
# always replaced by /dev/null.)
1129
# The exception is when not debugging but nevertheless
1130
# running in the foreground; use the previously
1131
# created wnull.
1132
popen_args = {"close_fds": True,
1133
"shell": True,
1134
"cwd": "/"}
1135
if (not self.server_settings["debug"]
1136
and self.server_settings["foreground"]):
1137
popen_args.update({"stdout": wnull,
1138
"stderr": wnull})
1139
pipe = multiprocessing.Pipe(duplex=False)
1140
self.checker = multiprocessing.Process(
1141
target=call_pipe,
1142
args=(pipe[1], subprocess.call, command),
1143
kwargs=popen_args)
1144
self.checker.start()
1145
self.checker_callback_tag = GLib.io_add_watch(
1146
pipe[0].fileno(), GLib.IO_IN,
1147
self.checker_callback, pipe[0], command)
1148
# Re-run this periodically if run by GLib.timeout_add
713
1149
return True
714
1150
715
1151
def stop_checker(self):
716
1152
"""Force the checker process, if any, to stop."""
717
1153
if self.checker_callback_tag:
718
gobject.source_remove(self.checker_callback_tag)
1154
GLib.source_remove(self.checker_callback_tag)
719
1155
self.checker_callback_tag = None
720
1156
if getattr(self, "checker", None) is None:
721
1157
return
722
1158
logger.debug("Stopping checker for %(name)s", vars(self))
723
try:
724
os.kill(self.checker.pid, signal.SIGTERM)
725
#time.sleep(0.5)
726
#if self.checker.poll() is None:
727
# os.kill(self.checker.pid, signal.SIGKILL)
728
except OSError as error:
729
if error.errno != errno.ESRCH: # No such process
730
raise
1159
self.checker.terminate()
731
1160
self.checker = None
732
1161
733
1162
734
def dbus_service_property(dbus_interface, signature="v",
735
access="readwrite", byte_arrays=False):
1163
def dbus_service_property(dbus_interface,
1164
signature="v",
1165
access="readwrite",
1166
byte_arrays=False):
736
1167
"""Decorators for marking methods of a DBusObjectWithProperties to
737
1168
become properties on the D-Bus.
738
1169
739
1170
The decorated method will be called with no arguments by "Get"
740
1171
and with one argument by "Set".
741
1172
742
1173
The parameters, where they are supported, are the same as
743
1174
dbus.service.method, except there is only "signature", since the
744
1175
type from Get() and the type sent to Set() is the same.
747
1178
# "Set" method, so we fail early here:
748
1179
if byte_arrays and signature != "ay":
749
1180
raise ValueError("Byte arrays not supported for non-'ay'"
750
" signature %r" % signature)
1181
" signature {!r}".format(signature))
1182
751
1183
def decorator(func):
752
1184
func._dbus_is_property = True
753
1185
func._dbus_interface = dbus_interface
756
1188
func._dbus_name = func.__name__
757
1189
if func._dbus_name.endswith("_dbus_property"):
758
1190
func._dbus_name = func._dbus_name[:-14]
759
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
760
return func
1191
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1192
return func
1193
1194
return decorator
1195
1196
1197
def dbus_interface_annotations(dbus_interface):
1198
"""Decorator for marking functions returning interface annotations
1199
1200
Usage:
1201
1202
@dbus_interface_annotations("org.example.Interface")
1203
def _foo(self): # Function name does not matter
1204
return {"org.freedesktop.DBus.Deprecated": "true",
1205
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1206
"false"}
1207
"""
1208
1209
def decorator(func):
1210
func._dbus_is_interface = True
1211
func._dbus_interface = dbus_interface
1212
func._dbus_name = dbus_interface
1213
return func
1214
1215
return decorator
1216
1217
1218
def dbus_annotations(annotations):
1219
"""Decorator to annotate D-Bus methods, signals or properties
1220
Usage:
1221
1222
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1223
"org.freedesktop.DBus.Property."
1224
"EmitsChangedSignal": "false"})
1225
@dbus_service_property("org.example.Interface", signature="b",
1226
access="r")
1227
def Property_dbus_property(self):
1228
return dbus.Boolean(False)
1229
1230
See also the DBusObjectWithAnnotations class.
1231
"""
1232
1233
def decorator(func):
1234
func._dbus_annotations = annotations
1235
return func
1236
761
1237
return decorator
762
1238
763
1239
764
1240
class DBusPropertyException(dbus.exceptions.DBusException):
765
1241
"""A base class for D-Bus property-related exceptions
766
1242
"""
767
def __unicode__(self):
768
return unicode(str(self))
1243
pass
769
1244
770
1245
771
1246
class DBusPropertyAccessException(DBusPropertyException):
780
1255
pass
781
1256
782
1257
783
class DBusObjectWithProperties(dbus.service.Object):
1258
class DBusObjectWithAnnotations(dbus.service.Object):
1259
"""A D-Bus object with annotations.
1260
1261
Classes inheriting from this can use the dbus_annotations
1262
decorator to add annotations to methods or signals.
1263
"""
1264
1265
@staticmethod
1266
def _is_dbus_thing(thing):
1267
"""Returns a function testing if an attribute is a D-Bus thing
1268
1269
If called like _is_dbus_thing("method") it returns a function
1270
suitable for use as predicate to inspect.getmembers().
1271
"""
1272
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1273
False)
1274
1275
def _get_all_dbus_things(self, thing):
1276
"""Returns a generator of (name, attribute) pairs
1277
"""
1278
return ((getattr(athing.__get__(self), "_dbus_name", name),
1279
athing.__get__(self))
1280
for cls in self.__class__.__mro__
1281
for name, athing in
1282
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1283
1284
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1285
out_signature="s",
1286
path_keyword='object_path',
1287
connection_keyword='connection')
1288
def Introspect(self, object_path, connection):
1289
"""Overloading of standard D-Bus method.
1290
1291
Inserts annotation tags on methods and signals.
1292
"""
1293
xmlstring = dbus.service.Object.Introspect(self, object_path,
1294
connection)
1295
try:
1296
document = xml.dom.minidom.parseString(xmlstring)
1297
1298
for if_tag in document.getElementsByTagName("interface"):
1299
# Add annotation tags
1300
for typ in ("method", "signal"):
1301
for tag in if_tag.getElementsByTagName(typ):
1302
annots = dict()
1303
for name, prop in (self.
1304
_get_all_dbus_things(typ)):
1305
if (name == tag.getAttribute("name")
1306
and prop._dbus_interface
1307
== if_tag.getAttribute("name")):
1308
annots.update(getattr(
1309
prop, "_dbus_annotations", {}))
1310
for name, value in annots.items():
1311
ann_tag = document.createElement(
1312
"annotation")
1313
ann_tag.setAttribute("name", name)
1314
ann_tag.setAttribute("value", value)
1315
tag.appendChild(ann_tag)
1316
# Add interface annotation tags
1317
for annotation, value in dict(
1318
itertools.chain.from_iterable(
1319
annotations().items()
1320
for name, annotations
1321
in self._get_all_dbus_things("interface")
1322
if name == if_tag.getAttribute("name")
1323
)).items():
1324
ann_tag = document.createElement("annotation")
1325
ann_tag.setAttribute("name", annotation)
1326
ann_tag.setAttribute("value", value)
1327
if_tag.appendChild(ann_tag)
1328
# Fix argument name for the Introspect method itself
1329
if (if_tag.getAttribute("name")
1330
== dbus.INTROSPECTABLE_IFACE):
1331
for cn in if_tag.getElementsByTagName("method"):
1332
if cn.getAttribute("name") == "Introspect":
1333
for arg in cn.getElementsByTagName("arg"):
1334
if (arg.getAttribute("direction")
1335
== "out"):
1336
arg.setAttribute("name",
1337
"xml_data")
1338
xmlstring = document.toxml("utf-8")
1339
document.unlink()
1340
except (AttributeError, xml.dom.DOMException,
1341
xml.parsers.expat.ExpatError) as error:
1342
logger.error("Failed to override Introspection method",
1343
exc_info=error)
1344
return xmlstring
1345
1346
1347
class DBusObjectWithProperties(DBusObjectWithAnnotations):
784
1348
"""A D-Bus object with properties.
785
1349
786
1350
Classes inheriting from this can use the dbus_service_property
787
1351
decorator to expose methods as D-Bus properties. It exposes the
788
1352
standard Get(), Set(), and GetAll() methods on the D-Bus.
789
1353
"""
790
791
@staticmethod
792
def _is_dbus_property(obj):
793
return getattr(obj, "_dbus_is_property", False)
794
795
def _get_all_dbus_properties(self):
796
"""Returns a generator of (name, attribute) pairs
797
"""
798
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
799
for cls in self.__class__.__mro__
800
for name, prop in
801
inspect.getmembers(cls, self._is_dbus_property))
802
1354
803
1355
def _get_dbus_property(self, interface_name, property_name):
804
1356
"""Returns a bound method if one exists which is a D-Bus
805
1357
property with the specified name and interface.
806
1358
"""
807
for cls in self.__class__.__mro__:
808
for name, value in (inspect.getmembers
809
(cls, self._is_dbus_property)):
1359
for cls in self.__class__.__mro__:
1360
for name, value in inspect.getmembers(
1361
cls, self._is_dbus_thing("property")):
810
1362
if (value._dbus_name == property_name
811
1363
and value._dbus_interface == interface_name):
812
1364
return value.__get__(self)
813
1365
814
1366
# No such property
815
raise DBusPropertyNotFound(self.dbus_object_path + ":"
816
+ interface_name + "."
817
+ property_name)
818
819
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1367
raise DBusPropertyNotFound("{}:{}.{}".format(
1368
self.dbus_object_path, interface_name, property_name))
1369
1370
@classmethod
1371
def _get_all_interface_names(cls):
1372
"""Get a sequence of all interfaces supported by an object"""
1373
return (name for name in set(getattr(getattr(x, attr),
1374
"_dbus_interface", None)
1375
for x in (inspect.getmro(cls))
1376
for attr in dir(x))
1377
if name is not None)
1378
1379
@dbus.service.method(dbus.PROPERTIES_IFACE,
1380
in_signature="ss",
820
1381
out_signature="v")
821
1382
def Get(self, interface_name, property_name):
822
1383
"""Standard D-Bus property Get() method, see D-Bus standard.
828
1389
if not hasattr(value, "variant_level"):
829
1390
return value
830
1391
return type(value)(value, variant_level=value.variant_level+1)
831
1392
832
1393
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
833
1394
def Set(self, interface_name, property_name, value):
834
1395
"""Standard D-Bus property Set() method, see D-Bus standard.
840
1401
# The byte_arrays option is not supported yet on
841
1402
# signatures other than "ay".
842
1403
if prop._dbus_signature != "ay":
843
raise ValueError
844
value = dbus.ByteArray(''.join(unichr(byte)
845
for byte in value))
1404
raise ValueError("Byte arrays not supported for non-"
1405
"'ay' signature {!r}"
1406
.format(prop._dbus_signature))
1407
value = dbus.ByteArray(b''.join(chr(byte)
1408
for byte in value))
846
1409
prop(value)
847
848
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1410
1411
@dbus.service.method(dbus.PROPERTIES_IFACE,
1412
in_signature="s",
849
1413
out_signature="a{sv}")
850
1414
def GetAll(self, interface_name):
851
1415
"""Standard D-Bus property GetAll() method, see D-Bus
852
1416
standard.
853
1417
854
1418
Note: Will not include properties with access="write".
855
1419
"""
856
1420
properties = {}
857
for name, prop in self._get_all_dbus_properties():
1421
for name, prop in self._get_all_dbus_things("property"):
858
1422
if (interface_name
859
1423
and interface_name != prop._dbus_interface):
860
1424
# Interface non-empty but did not match
866
1430
if not hasattr(value, "variant_level"):
867
1431
properties[name] = value
868
1432
continue
869
properties[name] = type(value)(value, variant_level=
870
value.variant_level+1)
1433
properties[name] = type(value)(
1434
value, variant_level=value.variant_level + 1)
871
1435
return dbus.Dictionary(properties, signature="sv")
872
1436
1437
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1438
def PropertiesChanged(self, interface_name, changed_properties,
1439
invalidated_properties):
1440
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1441
standard.
1442
"""
1443
pass
1444
873
1445
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
874
1446
out_signature="s",
875
1447
path_keyword='object_path',
876
1448
connection_keyword='connection')
877
1449
def Introspect(self, object_path, connection):
878
"""Standard D-Bus method, overloaded to insert property tags.
1450
"""Overloading of standard D-Bus method.
1451
1452
Inserts property tags and interface annotation tags.
879
1453
"""
880
xmlstring = dbus.service.Object.Introspect(self, object_path,
881
connection)
1454
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1455
object_path,
1456
connection)
882
1457
try:
883
1458
document = xml.dom.minidom.parseString(xmlstring)
1459
884
1460
def make_tag(document, name, prop):
885
1461
e = document.createElement("property")
886
1462
e.setAttribute("name", name)
887
1463
e.setAttribute("type", prop._dbus_signature)
888
1464
e.setAttribute("access", prop._dbus_access)
889
1465
return e
1466
890
1467
for if_tag in document.getElementsByTagName("interface"):
1468
# Add property tags
891
1469
for tag in (make_tag(document, name, prop)
892
1470
for name, prop
893
in self._get_all_dbus_properties()
1471
in self._get_all_dbus_things("property")
894
1472
if prop._dbus_interface
895
1473
== if_tag.getAttribute("name")):
896
1474
if_tag.appendChild(tag)
1475
# Add annotation tags for properties
1476
for tag in if_tag.getElementsByTagName("property"):
1477
annots = dict()
1478
for name, prop in self._get_all_dbus_things(
1479
"property"):
1480
if (name == tag.getAttribute("name")
1481
and prop._dbus_interface
1482
== if_tag.getAttribute("name")):
1483
annots.update(getattr(
1484
prop, "_dbus_annotations", {}))
1485
for name, value in annots.items():
1486
ann_tag = document.createElement(
1487
"annotation")
1488
ann_tag.setAttribute("name", name)
1489
ann_tag.setAttribute("value", value)
1490
tag.appendChild(ann_tag)
897
1491
# Add the names to the return values for the
898
1492
# "org.freedesktop.DBus.Properties" methods
899
1493
if (if_tag.getAttribute("name")
914
1508
except (AttributeError, xml.dom.DOMException,
915
1509
xml.parsers.expat.ExpatError) as error:
916
1510
logger.error("Failed to override Introspection method",
917
error)
918
return xmlstring
919
920
921
def datetime_to_dbus (dt, variant_level=0):
1511
exc_info=error)
1512
return xmlstring
1513
1514
1515
try:
1516
dbus.OBJECT_MANAGER_IFACE
1517
except AttributeError:
1518
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1519
1520
1521
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1522
"""A D-Bus object with an ObjectManager.
1523
1524
Classes inheriting from this exposes the standard
1525
GetManagedObjects call and the InterfacesAdded and
1526
InterfacesRemoved signals on the standard
1527
"org.freedesktop.DBus.ObjectManager" interface.
1528
1529
Note: No signals are sent automatically; they must be sent
1530
manually.
1531
"""
1532
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1533
out_signature="a{oa{sa{sv}}}")
1534
def GetManagedObjects(self):
1535
"""This function must be overridden"""
1536
raise NotImplementedError()
1537
1538
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1539
signature="oa{sa{sv}}")
1540
def InterfacesAdded(self, object_path, interfaces_and_properties):
1541
pass
1542
1543
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1544
def InterfacesRemoved(self, object_path, interfaces):
1545
pass
1546
1547
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1548
out_signature="s",
1549
path_keyword='object_path',
1550
connection_keyword='connection')
1551
def Introspect(self, object_path, connection):
1552
"""Overloading of standard D-Bus method.
1553
1554
Override return argument name of GetManagedObjects to be
1555
"objpath_interfaces_and_properties"
1556
"""
1557
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1558
object_path,
1559
connection)
1560
try:
1561
document = xml.dom.minidom.parseString(xmlstring)
1562
1563
for if_tag in document.getElementsByTagName("interface"):
1564
# Fix argument name for the GetManagedObjects method
1565
if (if_tag.getAttribute("name")
1566
== dbus.OBJECT_MANAGER_IFACE):
1567
for cn in if_tag.getElementsByTagName("method"):
1568
if (cn.getAttribute("name")
1569
== "GetManagedObjects"):
1570
for arg in cn.getElementsByTagName("arg"):
1571
if (arg.getAttribute("direction")
1572
== "out"):
1573
arg.setAttribute(
1574
"name",
1575
"objpath_interfaces"
1576
"_and_properties")
1577
xmlstring = document.toxml("utf-8")
1578
document.unlink()
1579
except (AttributeError, xml.dom.DOMException,
1580
xml.parsers.expat.ExpatError) as error:
1581
logger.error("Failed to override Introspection method",
1582
exc_info=error)
1583
return xmlstring
1584
1585
1586
def datetime_to_dbus(dt, variant_level=0):
922
1587
"""Convert a UTC datetime.datetime() to a D-Bus type."""
923
1588
if dt is None:
924
return dbus.String("", variant_level = variant_level)
925
return dbus.String(dt.isoformat(),
926
variant_level=variant_level)
927
928
929
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
930
.__metaclass__):
931
"""Applied to an empty subclass of a D-Bus object, this metaclass
932
will add additional D-Bus attributes matching a certain pattern.
1589
return dbus.String("", variant_level=variant_level)
1590
return dbus.String(dt.isoformat(), variant_level=variant_level)
1591
1592
1593
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1594
"""A class decorator; applied to a subclass of
1595
dbus.service.Object, it will add alternate D-Bus attributes with
1596
interface names according to the "alt_interface_names" mapping.
1597
Usage:
1598
1599
@alternate_dbus_interfaces({"org.example.Interface":
1600
"net.example.AlternateInterface"})
1601
class SampleDBusObject(dbus.service.Object):
1602
@dbus.service.method("org.example.Interface")
1603
def SampleDBusMethod():
1604
pass
1605
1606
The above "SampleDBusMethod" on "SampleDBusObject" will be
1607
reachable via two interfaces: "org.example.Interface" and
1608
"net.example.AlternateInterface", the latter of which will have
1609
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1610
"true", unless "deprecate" is passed with a False value.
1611
1612
This works for methods and signals, and also for D-Bus properties
1613
(from DBusObjectWithProperties) and interfaces (from the
1614
dbus_interface_annotations decorator).
933
1615
"""
934
def __new__(mcs, name, bases, attr):
935
# Go through all the base classes which could have D-Bus
936
# methods, signals, or properties in them
937
for base in (b for b in bases
938
if issubclass(b, dbus.service.Object)):
939
# Go though all attributes of the base class
940
for attrname, attribute in inspect.getmembers(base):
1616
1617
def wrapper(cls):
1618
for orig_interface_name, alt_interface_name in (
1619
alt_interface_names.items()):
1620
attr = {}
1621
interface_names = set()
1622
# Go though all attributes of the class
1623
for attrname, attribute in inspect.getmembers(cls):
941
1624
# Ignore non-D-Bus attributes, and D-Bus attributes
942
1625
# with the wrong interface name
943
1626
if (not hasattr(attribute, "_dbus_interface")
944
or not attribute._dbus_interface
945
.startswith("se.recompile.Mandos")):
1627
or not attribute._dbus_interface.startswith(
1628
orig_interface_name)):
946
1629
continue
947
1630
# Create an alternate D-Bus interface name based on
948
1631
# the current name
949
alt_interface = (attribute._dbus_interface
950
.replace("se.recompile.Mandos",
951
"se.bsnet.fukt.Mandos"))
1632
alt_interface = attribute._dbus_interface.replace(
1633
orig_interface_name, alt_interface_name)
1634
interface_names.add(alt_interface)
952
1635
# Is this a D-Bus signal?
953
1636
if getattr(attribute, "_dbus_is_signal", False):
954
# Extract the original non-method function by
955
# black magic
956
nonmethod_func = (dict(
1637
# Extract the original non-method undecorated
1638
# function by black magic
1639
if sys.version_info.major == 2:
1640
nonmethod_func = (dict(
957
1641
zip(attribute.func_code.co_freevars,
958
attribute.__closure__))["func"]
959
.cell_contents)
1642
attribute.__closure__))
1643
["func"].cell_contents)
1644
else:
1645
nonmethod_func = (dict(
1646
zip(attribute.__code__.co_freevars,
1647
attribute.__closure__))
1648
["func"].cell_contents)
960
1649
# Create a new, but exactly alike, function
961
1650
# object, and decorate it to be a new D-Bus signal
962
1651
# with the alternate D-Bus interface name
963
new_function = (dbus.service.signal
964
(alt_interface,
965
attribute._dbus_signature)
966
(types.FunctionType(
967
nonmethod_func.func_code,
968
nonmethod_func.func_globals,
969
nonmethod_func.func_name,
970
nonmethod_func.func_defaults,
971
nonmethod_func.func_closure)))
1652
new_function = copy_function(nonmethod_func)
1653
new_function = (dbus.service.signal(
1654
alt_interface,
1655
attribute._dbus_signature)(new_function))
1656
# Copy annotations, if any
1657
try:
1658
new_function._dbus_annotations = dict(
1659
attribute._dbus_annotations)
1660
except AttributeError:
1661
pass
1662
972
1663
# Define a creator of a function to call both the
973
# old and new functions, so both the old and new
974
# signals gets sent when the function is called
1664
# original and alternate functions, so both the
1665
# original and alternate signals gets sent when
1666
# the function is called
975
1667
def fixscope(func1, func2):
976
1668
"""This function is a scope container to pass
977
1669
func1 and func2 to the "call_both" function
978
1670
outside of its arguments"""
1671
1672
@functools.wraps(func2)
979
1673
def call_both(*args, **kwargs):
980
1674
"""This function will emit two D-Bus
981
1675
signals by calling func1 and func2"""
982
1676
func1(*args, **kwargs)
983
1677
func2(*args, **kwargs)
1678
# Make wrapper function look like a D-Bus
1679
# signal
1680
for name, attr in inspect.getmembers(func2):
1681
if name.startswith("_dbus_"):
1682
setattr(call_both, name, attr)
1683
984
1684
return call_both
985
1685
# Create the "call_both" function and add it to
986
1686
# the class
987
attr[attrname] = fixscope(attribute,
988
new_function)
1687
attr[attrname] = fixscope(attribute, new_function)
989
1688
# Is this a D-Bus method?
990
1689
elif getattr(attribute, "_dbus_is_method", False):
991
1690
# Create a new, but exactly alike, function
992
1691
# object. Decorate it to be a new D-Bus method
993
1692
# with the alternate D-Bus interface name. Add it
994
1693
# to the class.
995
attr[attrname] = (dbus.service.method
996
(alt_interface,
997
attribute._dbus_in_signature,
998
attribute._dbus_out_signature)
999
(types.FunctionType
1000
(attribute.func_code,
1001
attribute.func_globals,
1002
attribute.func_name,
1003
attribute.func_defaults,
1004
attribute.func_closure)))
1694
attr[attrname] = (
1695
dbus.service.method(
1696
alt_interface,
1697
attribute._dbus_in_signature,
1698
attribute._dbus_out_signature)
1699
(copy_function(attribute)))
1700
# Copy annotations, if any
1701
try:
1702
attr[attrname]._dbus_annotations = dict(
1703
attribute._dbus_annotations)
1704
except AttributeError:
1705
pass
1005
1706
# Is this a D-Bus property?
1006
1707
elif getattr(attribute, "_dbus_is_property", False):
1007
1708
# Create a new, but exactly alike, function
1008
1709
# object, and decorate it to be a new D-Bus
1009
1710
# property with the alternate D-Bus interface
1010
1711
# name. Add it to the class.
1011
attr[attrname] = (dbus_service_property
1012
(alt_interface,
1013
attribute._dbus_signature,
1014
attribute._dbus_access,
1015
attribute
1016
._dbus_get_args_options
1017
["byte_arrays"])
1018
(types.FunctionType
1019
(attribute.func_code,
1020
attribute.func_globals,
1021
attribute.func_name,
1022
attribute.func_defaults,
1023
attribute.func_closure)))
1024
return type.__new__(mcs, name, bases, attr)
1025
1026
1712
attr[attrname] = (dbus_service_property(
1713
alt_interface, attribute._dbus_signature,
1714
attribute._dbus_access,
1715
attribute._dbus_get_args_options
1716
["byte_arrays"])
1717
(copy_function(attribute)))
1718
# Copy annotations, if any
1719
try:
1720
attr[attrname]._dbus_annotations = dict(
1721
attribute._dbus_annotations)
1722
except AttributeError:
1723
pass
1724
# Is this a D-Bus interface?
1725
elif getattr(attribute, "_dbus_is_interface", False):
1726
# Create a new, but exactly alike, function
1727
# object. Decorate it to be a new D-Bus interface
1728
# with the alternate D-Bus interface name. Add it
1729
# to the class.
1730
attr[attrname] = (
1731
dbus_interface_annotations(alt_interface)
1732
(copy_function(attribute)))
1733
if deprecate:
1734
# Deprecate all alternate interfaces
1735
iname = "_AlternateDBusNames_interface_annotation{}"
1736
for interface_name in interface_names:
1737
1738
@dbus_interface_annotations(interface_name)
1739
def func(self):
1740
return {"org.freedesktop.DBus.Deprecated":
1741
"true"}
1742
# Find an unused name
1743
for aname in (iname.format(i)
1744
for i in itertools.count()):
1745
if aname not in attr:
1746
attr[aname] = func
1747
break
1748
if interface_names:
1749
# Replace the class with a new subclass of it with
1750
# methods, signals, etc. as created above.
1751
if sys.version_info.major == 2:
1752
cls = type(b"{}Alternate".format(cls.__name__),
1753
(cls, ), attr)
1754
else:
1755
cls = type("{}Alternate".format(cls.__name__),
1756
(cls, ), attr)
1757
return cls
1758
1759
return wrapper
1760
1761
1762
@alternate_dbus_interfaces({"se.recompile.Mandos":
1763
"se.bsnet.fukt.Mandos"})
1027
1764
class ClientDBus(Client, DBusObjectWithProperties):
1028
1765
"""A Client class using D-Bus
1029
1766
1030
1767
Attributes:
1031
1768
dbus_object_path: dbus.ObjectPath
1032
1769
bus: dbus.SystemBus()
1033
1770
"""
1034
1771
1035
1772
runtime_expansions = (Client.runtime_expansions
1036
+ ("dbus_object_path",))
1037
1773
+ ("dbus_object_path", ))
1774
1775
_interface = "se.recompile.Mandos.Client"
1776
1038
1777
# dbus.service.Object doesn't use super(), so we can't either.
1039
1040
def __init__(self, bus = None, *args, **kwargs):
1778
1779
def __init__(self, bus=None, *args, **kwargs):
1041
1780
self.bus = bus
1042
1781
Client.__init__(self, *args, **kwargs)
1043
self._approvals_pending = 0
1044
1045
self._approvals_pending = 0
1046
1782
# Only now, when this client is initialized, can it show up on
1047
1783
# the D-Bus
1048
client_object_name = unicode(self.name).translate(
1784
client_object_name = str(self.name).translate(
1049
1785
{ord("."): ord("_"),
1050
1786
ord("-"): ord("_")})
1051
self.dbus_object_path = (dbus.ObjectPath
1052
("/clients/" + client_object_name))
1787
self.dbus_object_path = dbus.ObjectPath(
1788
"/clients/" + client_object_name)
1053
1789
DBusObjectWithProperties.__init__(self, self.bus,
1054
1790
self.dbus_object_path)
1055
1056
def notifychangeproperty(transform_func,
1057
dbus_name, type_func=lambda x: x,
1058
variant_level=1):
1791
1792
def notifychangeproperty(transform_func, dbus_name,
1793
type_func=lambda x: x,
1794
variant_level=1,
1795
invalidate_only=False,
1796
_interface=_interface):
1059
1797
""" Modify a variable so that it's a property which announces
1060
1798
its changes to DBus.
1061
1799
1062
1800
transform_fun: Function that takes a value and a variant_level
1063
1801
and transforms it to a D-Bus type.
1064
1802
dbus_name: D-Bus name of the variable
1066
1804
to the D-Bus. Default: no transform
1067
1805
variant_level: D-Bus variant level. Default: 1
1068
1806
"""
1069
attrname = "_{0}".format(dbus_name)
1807
attrname = "_{}".format(dbus_name)
1808
1070
1809
def setter(self, value):
1071
1810
if hasattr(self, "dbus_object_path"):
1072
1811
if (not hasattr(self, attrname) or
1073
1812
type_func(getattr(self, attrname, None))
1074
1813
!= type_func(value)):
1075
dbus_value = transform_func(type_func(value),
1076
variant_level
1077
=variant_level)
1078
self.PropertyChanged(dbus.String(dbus_name),
1079
dbus_value)
1814
if invalidate_only:
1815
self.PropertiesChanged(
1816
_interface, dbus.Dictionary(),
1817
dbus.Array((dbus_name, )))
1818
else:
1819
dbus_value = transform_func(
1820
type_func(value),
1821
variant_level=variant_level)
1822
self.PropertyChanged(dbus.String(dbus_name),
1823
dbus_value)
1824
self.PropertiesChanged(
1825
_interface,
1826
dbus.Dictionary({dbus.String(dbus_name):
1827
dbus_value}),
1828
dbus.Array())
1080
1829
setattr(self, attrname, value)
1081
1830
1082
1831
return property(lambda self: getattr(self, attrname), setter)
1083
1084
1832
1085
1833
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1086
1834
approvals_pending = notifychangeproperty(dbus.Boolean,
1087
1835
"ApprovalPending",
1088
type_func = bool)
1836
type_func=bool)
1089
1837
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1090
1838
last_enabled = notifychangeproperty(datetime_to_dbus,
1091
1839
"LastEnabled")
1092
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1093
type_func = lambda checker:
1094
checker is not None)
1840
checker = notifychangeproperty(
1841
dbus.Boolean, "CheckerRunning",
1842
type_func=lambda checker: checker is not None)
1095
1843
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1096
1844
"LastCheckedOK")
1845
last_checker_status = notifychangeproperty(dbus.Int16,
1846
"LastCheckerStatus")
1097
1847
last_approval_request = notifychangeproperty(
1098
1848
datetime_to_dbus, "LastApprovalRequest")
1099
1849
approved_by_default = notifychangeproperty(dbus.Boolean,
1100
1850
"ApprovedByDefault")
1101
approval_delay = notifychangeproperty(dbus.UInt64,
1102
"ApprovalDelay",
1103
type_func =
1104
timedelta_to_milliseconds)
1851
approval_delay = notifychangeproperty(
1852
dbus.UInt64, "ApprovalDelay",
1853
type_func=lambda td: td.total_seconds() * 1000)
1105
1854
approval_duration = notifychangeproperty(
1106
1855
dbus.UInt64, "ApprovalDuration",
1107
type_func = timedelta_to_milliseconds)
1856
type_func=lambda td: td.total_seconds() * 1000)
1108
1857
host = notifychangeproperty(dbus.String, "Host")
1109
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1110
type_func =
1111
timedelta_to_milliseconds)
1858
timeout = notifychangeproperty(
1859
dbus.UInt64, "Timeout",
1860
type_func=lambda td: td.total_seconds() * 1000)
1112
1861
extended_timeout = notifychangeproperty(
1113
1862
dbus.UInt64, "ExtendedTimeout",
1114
type_func = timedelta_to_milliseconds)
1115
interval = notifychangeproperty(dbus.UInt64,
1116
"Interval",
1117
type_func =
1118
timedelta_to_milliseconds)
1863
type_func=lambda td: td.total_seconds() * 1000)
1864
interval = notifychangeproperty(
1865
dbus.UInt64, "Interval",
1866
type_func=lambda td: td.total_seconds() * 1000)
1119
1867
checker_command = notifychangeproperty(dbus.String, "Checker")
1120
1868
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1869
invalidate_only=True)
1870
1121
1871
del notifychangeproperty
1122
1872
1123
1873
def __del__(self, *args, **kwargs):
1124
1874
try:
1125
1875
self.remove_from_connection()
1128
1878
if hasattr(DBusObjectWithProperties, "__del__"):
1129
1879
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1130
1880
Client.__del__(self, *args, **kwargs)
1131
1132
def checker_callback(self, pid, condition, command,
1133
*args, **kwargs):
1134
self.checker_callback_tag = None
1135
self.checker = None
1136
if os.WIFEXITED(condition):
1137
exitstatus = os.WEXITSTATUS(condition)
1881
1882
def checker_callback(self, source, condition,
1883
connection, command, *args, **kwargs):
1884
ret = Client.checker_callback(self, source, condition,
1885
connection, command, *args,
1886
**kwargs)
1887
exitstatus = self.last_checker_status
1888
if exitstatus >= 0:
1138
1889
# Emit D-Bus signal
1139
1890
self.CheckerCompleted(dbus.Int16(exitstatus),
1140
dbus.Int64(condition),
1891
# This is specific to GNU libC
1892
dbus.Int64(exitstatus << 8),
1141
1893
dbus.String(command))
1142
1894
else:
1143
1895
# Emit D-Bus signal
1144
1896
self.CheckerCompleted(dbus.Int16(-1),
1145
dbus.Int64(condition),
1897
dbus.Int64(
1898
# This is specific to GNU libC
1899
(exitstatus << 8)
1900
| self.last_checker_signal),
1146
1901
dbus.String(command))
1147
1148
return Client.checker_callback(self, pid, condition, command,
1149
*args, **kwargs)
1150
1902
return ret
1903
1151
1904
def start_checker(self, *args, **kwargs):
1152
old_checker = self.checker
1153
if self.checker is not None:
1154
old_checker_pid = self.checker.pid
1155
else:
1156
old_checker_pid = None
1905
old_checker_pid = getattr(self.checker, "pid", None)
1157
1906
r = Client.start_checker(self, *args, **kwargs)
1158
1907
# Only if new checker process was started
1159
1908
if (self.checker is not None
1161
1910
# Emit D-Bus signal
1162
1911
self.CheckerStarted(self.current_checker_command)
1163
1912
return r
1164
1913
1165
1914
def _reset_approved(self):
1166
1915
self.approved = None
1167
1916
return False
1168
1917
1169
1918
def approve(self, value=True):
1170
self.send_changedstate()
1171
1919
self.approved = value
1172
gobject.timeout_add(timedelta_to_milliseconds
1173
(self.approval_duration),
1174
self._reset_approved)
1175
1176
1177
## D-Bus methods, signals & properties
1178
_interface = "se.recompile.Mandos.Client"
1179
1180
## Signals
1181
1920
GLib.timeout_add(int(self.approval_duration.total_seconds()
1921
* 1000), self._reset_approved)
1922
self.send_changedstate()
1923
1924
# D-Bus methods, signals & properties
1925
1926
# Interfaces
1927
1928
# Signals
1929
1182
1930
# CheckerCompleted - signal
1183
1931
@dbus.service.signal(_interface, signature="nxs")
1184
1932
def CheckerCompleted(self, exitcode, waitstatus, command):
1185
1933
"D-Bus signal"
1186
1934
pass
1187
1935
1188
1936
# CheckerStarted - signal
1189
1937
@dbus.service.signal(_interface, signature="s")
1190
1938
def CheckerStarted(self, command):
1191
1939
"D-Bus signal"
1192
1940
pass
1193
1941
1194
1942
# PropertyChanged - signal
1943
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1195
1944
@dbus.service.signal(_interface, signature="sv")
1196
1945
def PropertyChanged(self, property, value):
1197
1946
"D-Bus signal"
1198
1947
pass
1199
1948
1200
1949
# GotSecret - signal
1201
1950
@dbus.service.signal(_interface)
1202
1951
def GotSecret(self):
1205
1954
server to mandos-client
1206
1955
"""
1207
1956
pass
1208
1957
1209
1958
# Rejected - signal
1210
1959
@dbus.service.signal(_interface, signature="s")
1211
1960
def Rejected(self, reason):
1212
1961
"D-Bus signal"
1213
1962
pass
1214
1963
1215
1964
# NeedApproval - signal
1216
1965
@dbus.service.signal(_interface, signature="tb")
1217
1966
def NeedApproval(self, timeout, default):
1218
1967
"D-Bus signal"
1219
1968
return self.need_approval()
1220
1221
# NeRwequest - signal
1222
@dbus.service.signal(_interface, signature="s")
1223
def NewRequest(self, ip):
1224
"""D-Bus signal
1225
Is sent after a client request a password.
1226
"""
1227
pass
1228
1229
## Methods
1230
1969
1970
# Methods
1971
1231
1972
# Approve - method
1232
1973
@dbus.service.method(_interface, in_signature="b")
1233
1974
def Approve(self, value):
1234
1975
self.approve(value)
1235
1976
1236
1977
# CheckedOK - method
1237
1978
@dbus.service.method(_interface)
1238
1979
def CheckedOK(self):
1239
1980
self.checked_ok()
1240
1981
1241
1982
# Enable - method
1983
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1242
1984
@dbus.service.method(_interface)
1243
1985
def Enable(self):
1244
1986
"D-Bus method"
1245
1987
self.enable()
1246
1988
1247
1989
# StartChecker - method
1990
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1248
1991
@dbus.service.method(_interface)
1249
1992
def StartChecker(self):
1250
1993
"D-Bus method"
1251
1994
self.start_checker()
1252
1995
1253
1996
# Disable - method
1997
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1254
1998
@dbus.service.method(_interface)
1255
1999
def Disable(self):
1256
2000
"D-Bus method"
1257
2001
self.disable()
1258
2002
1259
2003
# StopChecker - method
2004
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1260
2005
@dbus.service.method(_interface)
1261
2006
def StopChecker(self):
1262
2007
self.stop_checker()
1263
1264
## Properties
1265
2008
2009
# Properties
2010
1266
2011
# ApprovalPending - property
1267
2012
@dbus_service_property(_interface, signature="b", access="read")
1268
2013
def ApprovalPending_dbus_property(self):
1269
2014
return dbus.Boolean(bool(self.approvals_pending))
1270
2015
1271
2016
# ApprovedByDefault - property
1272
@dbus_service_property(_interface, signature="b",
2017
@dbus_service_property(_interface,
2018
signature="b",
1273
2019
access="readwrite")
1274
2020
def ApprovedByDefault_dbus_property(self, value=None):
1275
2021
if value is None: # get
1276
2022
return dbus.Boolean(self.approved_by_default)
1277
2023
self.approved_by_default = bool(value)
1278
2024
1279
2025
# ApprovalDelay - property
1280
@dbus_service_property(_interface, signature="t",
2026
@dbus_service_property(_interface,
2027
signature="t",
1281
2028
access="readwrite")
1282
2029
def ApprovalDelay_dbus_property(self, value=None):
1283
2030
if value is None: # get
1284
return dbus.UInt64(self.approval_delay_milliseconds())
2031
return dbus.UInt64(self.approval_delay.total_seconds()
2032
* 1000)
1285
2033
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1286
2034
1287
2035
# ApprovalDuration - property
1288
@dbus_service_property(_interface, signature="t",
2036
@dbus_service_property(_interface,
2037
signature="t",
1289
2038
access="readwrite")
1290
2039
def ApprovalDuration_dbus_property(self, value=None):
1291
2040
if value is None: # get
1292
return dbus.UInt64(timedelta_to_milliseconds(
1293
self.approval_duration))
2041
return dbus.UInt64(self.approval_duration.total_seconds()
2042
* 1000)
1294
2043
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1295
2044
1296
2045
# Name - property
2046
@dbus_annotations(
2047
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1297
2048
@dbus_service_property(_interface, signature="s", access="read")
1298
2049
def Name_dbus_property(self):
1299
2050
return dbus.String(self.name)
1300
2051
2052
# KeyID - property
2053
@dbus_annotations(
2054
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2055
@dbus_service_property(_interface, signature="s", access="read")
2056
def KeyID_dbus_property(self):
2057
return dbus.String(self.key_id)
2058
1301
2059
# Fingerprint - property
2060
@dbus_annotations(
2061
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1302
2062
@dbus_service_property(_interface, signature="s", access="read")
1303
2063
def Fingerprint_dbus_property(self):
1304
2064
return dbus.String(self.fingerprint)
1305
2065
1306
2066
# Host - property
1307
@dbus_service_property(_interface, signature="s",
2067
@dbus_service_property(_interface,
2068
signature="s",
1308
2069
access="readwrite")
1309
2070
def Host_dbus_property(self, value=None):
1310
2071
if value is None: # get
1311
2072
return dbus.String(self.host)
1312
self.host = unicode(value)
1313
2073
self.host = str(value)
2074
1314
2075
# Created - property
2076
@dbus_annotations(
2077
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1315
2078
@dbus_service_property(_interface, signature="s", access="read")
1316
2079
def Created_dbus_property(self):
1317
2080
return datetime_to_dbus(self.created)
1318
2081
1319
2082
# LastEnabled - property
1320
2083
@dbus_service_property(_interface, signature="s", access="read")
1321
2084
def LastEnabled_dbus_property(self):
1322
2085
return datetime_to_dbus(self.last_enabled)
1323
2086
1324
2087
# Enabled - property
1325
@dbus_service_property(_interface, signature="b",
2088
@dbus_service_property(_interface,
2089
signature="b",
1326
2090
access="readwrite")
1327
2091
def Enabled_dbus_property(self, value=None):
1328
2092
if value is None: # get
1331
2095
self.enable()
1332
2096
else:
1333
2097
self.disable()
1334
2098
1335
2099
# LastCheckedOK - property
1336
@dbus_service_property(_interface, signature="s",
2100
@dbus_service_property(_interface,
2101
signature="s",
1337
2102
access="readwrite")
1338
2103
def LastCheckedOK_dbus_property(self, value=None):
1339
2104
if value is not None:
1340
2105
self.checked_ok()
1341
2106
return
1342
2107
return datetime_to_dbus(self.last_checked_ok)
1343
2108
2109
# LastCheckerStatus - property
2110
@dbus_service_property(_interface, signature="n", access="read")
2111
def LastCheckerStatus_dbus_property(self):
2112
return dbus.Int16(self.last_checker_status)
2113
1344
2114
# Expires - property
1345
2115
@dbus_service_property(_interface, signature="s", access="read")
1346
2116
def Expires_dbus_property(self):
1347
2117
return datetime_to_dbus(self.expires)
1348
2118
1349
2119
# LastApprovalRequest - property
1350
2120
@dbus_service_property(_interface, signature="s", access="read")
1351
2121
def LastApprovalRequest_dbus_property(self):
1352
2122
return datetime_to_dbus(self.last_approval_request)
1353
2123
1354
2124
# Timeout - property
1355
@dbus_service_property(_interface, signature="t",
2125
@dbus_service_property(_interface,
2126
signature="t",
1356
2127
access="readwrite")
1357
2128
def Timeout_dbus_property(self, value=None):
1358
2129
if value is None: # get
1359
return dbus.UInt64(self.timeout_milliseconds())
2130
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2131
old_timeout = self.timeout
1360
2132
self.timeout = datetime.timedelta(0, 0, 0, value)
1361
if getattr(self, "disable_initiator_tag", None) is None:
1362
return
1363
# Reschedule timeout
1364
gobject.source_remove(self.disable_initiator_tag)
1365
self.disable_initiator_tag = None
1366
self.expires = None
1367
time_to_die = timedelta_to_milliseconds((self
1368
.last_checked_ok
1369
+ self.timeout)
1370
- datetime.datetime
1371
.utcnow())
1372
if time_to_die <= 0:
1373
# The timeout has passed
1374
self.disable()
1375
else:
1376
self.expires = (datetime.datetime.utcnow()
1377
+ datetime.timedelta(milliseconds =
1378
time_to_die))
1379
self.disable_initiator_tag = (gobject.timeout_add
1380
(time_to_die, self.disable))
1381
2133
# Reschedule disabling
2134
if self.enabled:
2135
now = datetime.datetime.utcnow()
2136
self.expires += self.timeout - old_timeout
2137
if self.expires <= now:
2138
# The timeout has passed
2139
self.disable()
2140
else:
2141
if (getattr(self, "disable_initiator_tag", None)
2142
is None):
2143
return
2144
GLib.source_remove(self.disable_initiator_tag)
2145
self.disable_initiator_tag = GLib.timeout_add(
2146
int((self.expires - now).total_seconds() * 1000),
2147
self.disable)
2148
1382
2149
# ExtendedTimeout - property
1383
@dbus_service_property(_interface, signature="t",
2150
@dbus_service_property(_interface,
2151
signature="t",
1384
2152
access="readwrite")
1385
2153
def ExtendedTimeout_dbus_property(self, value=None):
1386
2154
if value is None: # get
1387
return dbus.UInt64(self.extended_timeout_milliseconds())
2155
return dbus.UInt64(self.extended_timeout.total_seconds()
2156
* 1000)
1388
2157
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1389
2158
1390
2159
# Interval - property
1391
@dbus_service_property(_interface, signature="t",
2160
@dbus_service_property(_interface,
2161
signature="t",
1392
2162
access="readwrite")
1393
2163
def Interval_dbus_property(self, value=None):
1394
2164
if value is None: # get
1395
return dbus.UInt64(self.interval_milliseconds())
2165
return dbus.UInt64(self.interval.total_seconds() * 1000)
1396
2166
self.interval = datetime.timedelta(0, 0, 0, value)
1397
2167
if getattr(self, "checker_initiator_tag", None) is None:
1398
2168
return
1399
2169
if self.enabled:
1400
2170
# Reschedule checker run
1401
gobject.source_remove(self.checker_initiator_tag)
1402
self.checker_initiator_tag = (gobject.timeout_add
1403
(value, self.start_checker))
1404
self.start_checker() # Start one now, too
1405
2171
GLib.source_remove(self.checker_initiator_tag)
2172
self.checker_initiator_tag = GLib.timeout_add(
2173
value, self.start_checker)
2174
self.start_checker() # Start one now, too
2175
1406
2176
# Checker - property
1407
@dbus_service_property(_interface, signature="s",
2177
@dbus_service_property(_interface,
2178
signature="s",
1408
2179
access="readwrite")
1409
2180
def Checker_dbus_property(self, value=None):
1410
2181
if value is None: # get
1411
2182
return dbus.String(self.checker_command)
1412
self.checker_command = unicode(value)
1413
2183
self.checker_command = str(value)
2184
1414
2185
# CheckerRunning - property
1415
@dbus_service_property(_interface, signature="b",
2186
@dbus_service_property(_interface,
2187
signature="b",
1416
2188
access="readwrite")
1417
2189
def CheckerRunning_dbus_property(self, value=None):
1418
2190
if value is None: # get
1421
2193
self.start_checker()
1422
2194
else:
1423
2195
self.stop_checker()
1424
2196
1425
2197
# ObjectPath - property
2198
@dbus_annotations(
2199
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2200
"org.freedesktop.DBus.Deprecated": "true"})
1426
2201
@dbus_service_property(_interface, signature="o", access="read")
1427
2202
def ObjectPath_dbus_property(self):
1428
return self.dbus_object_path # is already a dbus.ObjectPath
1429
2203
return self.dbus_object_path # is already a dbus.ObjectPath
2204
1430
2205
# Secret = property
1431
@dbus_service_property(_interface, signature="ay",
1432
access="write", byte_arrays=True)
2206
@dbus_annotations(
2207
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2208
"invalidates"})
2209
@dbus_service_property(_interface,
2210
signature="ay",
2211
access="write",
2212
byte_arrays=True)
1433
2213
def Secret_dbus_property(self, value):
1434
self.secret = str(value)
1435
2214
self.secret = bytes(value)
2215
1436
2216
del _interface
1437
2217
1438
2218
1439
class ProxyClient(object):
1440
def __init__(self, child_pipe, fpr, address):
2219
class ProxyClient:
2220
def __init__(self, child_pipe, key_id, fpr, address):
1441
2221
self._pipe = child_pipe
1442
self._pipe.send(('init', fpr, address))
2222
self._pipe.send(('init', key_id, fpr, address))
1443
2223
if not self._pipe.recv():
1444
raise KeyError()
1445
2224
raise KeyError(key_id or fpr)
2225
1446
2226
def __getattribute__(self, name):
1447
2227
if name == '_pipe':
1448
2228
return super(ProxyClient, self).__getattribute__(name)
1451
2231
if data[0] == 'data':
1452
2232
return data[1]
1453
2233
if data[0] == 'function':
2234
1454
2235
def func(*args, **kwargs):
1455
2236
self._pipe.send(('funcall', name, args, kwargs))
1456
2237
return self._pipe.recv()[1]
2238
1457
2239
return func
1458
2240
1459
2241
def __setattr__(self, name, value):
1460
2242
if name == '_pipe':
1461
2243
return super(ProxyClient, self).__setattr__(name, value)
1462
2244
self._pipe.send(('setattr', name, value))
1463
2245
1464
2246
1465
class ClientDBusTransitional(ClientDBus):
1466
__metaclass__ = AlternateDBusNamesMetaclass
1467
1468
1469
2247
class ClientHandler(socketserver.BaseRequestHandler, object):
1470
2248
"""A class to handle client connections.
1471
2249
1472
2250
Instantiated once for each connection to handle it.
1473
2251
Note: This will run in its own forked process."""
1474
2252
1475
2253
def handle(self):
1476
2254
with contextlib.closing(self.server.child_pipe) as child_pipe:
1477
2255
logger.info("TCP connection from: %s",
1478
unicode(self.client_address))
2256
str(self.client_address))
1479
2257
logger.debug("Pipe FD: %d",
1480
2258
self.server.child_pipe.fileno())
1481
1482
session = (gnutls.connection
1483
.ClientSession(self.request,
1484
gnutls.connection
1485
.X509Credentials()))
1486
1487
# Note: gnutls.connection.X509Credentials is really a
1488
# generic GnuTLS certificate credentials object so long as
1489
# no X.509 keys are added to it. Therefore, we can use it
1490
# here despite using OpenPGP certificates.
1491
1492
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1493
# "+AES-256-CBC", "+SHA1",
1494
# "+COMP-NULL", "+CTYPE-OPENPGP",
1495
# "+DHE-DSS"))
2259
2260
session = gnutls.ClientSession(self.request)
2261
2262
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2263
# "+AES-256-CBC", "+SHA1",
2264
# "+COMP-NULL", "+CTYPE-OPENPGP",
2265
# "+DHE-DSS"))
1496
2266
# Use a fallback default, since this MUST be set.
1497
2267
priority = self.server.gnutls_priority
1498
2268
if priority is None:
1499
2269
priority = "NORMAL"
1500
(gnutls.library.functions
1501
.gnutls_priority_set_direct(session._c_object,
1502
priority, None))
1503
2270
gnutls.priority_set_direct(session._c_object,
2271
priority.encode("utf-8"),
2272
None)
2273
1504
2274
# Start communication using the Mandos protocol
1505
2275
# Get protocol number
1506
2276
line = self.request.makefile().readline()
1507
2277
logger.debug("Protocol version: %r", line)
1508
2278
try:
1509
2279
if int(line.strip().split()[0]) > 1:
1510
raise RuntimeError
2280
raise RuntimeError(line)
1511
2281
except (ValueError, IndexError, RuntimeError) as error:
1512
2282
logger.error("Unknown protocol version: %s", error)
1513
2283
return
1514
2284
1515
2285
# Start GnuTLS connection
1516
2286
try:
1517
2287
session.handshake()
1518
except gnutls.errors.GNUTLSError as error:
2288
except gnutls.Error as error:
1519
2289
logger.warning("Handshake failed: %s", error)
1520
2290
# Do not run session.bye() here: the session is not
1521
2291
# established. Just abandon the request.
1522
2292
return
1523
2293
logger.debug("Handshake succeeded")
1524
2294
1525
2295
approval_required = False
1526
2296
try:
1527
try:
1528
fpr = self.fingerprint(self.peer_certificate
1529
(session))
1530
except (TypeError,
1531
gnutls.errors.GNUTLSError) as error:
1532
logger.warning("Bad certificate: %s", error)
1533
return
1534
logger.debug("Fingerprint: %s", fpr)
1535
1536
try:
1537
client = ProxyClient(child_pipe, fpr,
2297
if gnutls.has_rawpk:
2298
fpr = b""
2299
try:
2300
key_id = self.key_id(
2301
self.peer_certificate(session))
2302
except (TypeError, gnutls.Error) as error:
2303
logger.warning("Bad certificate: %s", error)
2304
return
2305
logger.debug("Key ID: %s", key_id)
2306
2307
else:
2308
key_id = b""
2309
try:
2310
fpr = self.fingerprint(
2311
self.peer_certificate(session))
2312
except (TypeError, gnutls.Error) as error:
2313
logger.warning("Bad certificate: %s", error)
2314
return
2315
logger.debug("Fingerprint: %s", fpr)
2316
2317
try:
2318
client = ProxyClient(child_pipe, key_id, fpr,
1538
2319
self.client_address)
1539
2320
except KeyError:
1540
2321
return
1541
1542
if self.server.use_dbus:
1543
# Emit D-Bus signal
1544
client.NewRequest(str(self.client_address))
1545
2322
1546
2323
if client.approval_delay:
1547
2324
delay = client.approval_delay
1548
2325
client.approvals_pending += 1
1549
2326
approval_required = True
1550
2327
1551
2328
while True:
1552
2329
if not client.enabled:
1553
2330
logger.info("Client %s is disabled",
1554
client.name)
2331
client.name)
1555
2332
if self.server.use_dbus:
1556
2333
# Emit D-Bus signal
1557
2334
client.Rejected("Disabled")
1558
2335
return
1559
2336
1560
2337
if client.approved or not client.approval_delay:
1561
#We are approved or approval is disabled
2338
# We are approved or approval is disabled
1562
2339
break
1563
2340
elif client.approved is None:
1564
2341
logger.info("Client %s needs approval",
1566
2343
if self.server.use_dbus:
1567
2344
# Emit D-Bus signal
1568
2345
client.NeedApproval(
1569
client.approval_delay_milliseconds(),
1570
client.approved_by_default)
2346
client.approval_delay.total_seconds()
2347
* 1000, client.approved_by_default)
1571
2348
else:
1572
2349
logger.warning("Client %s was not approved",
1573
2350
client.name)
1575
2352
# Emit D-Bus signal
1576
2353
client.Rejected("Denied")
1577
2354
return
1578
1579
#wait until timeout or approved
2355
2356
# wait until timeout or approved
1580
2357
time = datetime.datetime.now()
1581
2358
client.changedstate.acquire()
1582
(client.changedstate.wait
1583
(float(client.timedelta_to_milliseconds(delay)
1584
/ 1000)))
2359
client.changedstate.wait(delay.total_seconds())
1585
2360
client.changedstate.release()
1586
2361
time2 = datetime.datetime.now()
1587
2362
if (time2 - time) >= delay:
1597
2372
break
1598
2373
else:
1599
2374
delay -= time2 - time
1600
1601
sent_size = 0
1602
while sent_size < len(client.secret):
1603
try:
1604
sent = session.send(client.secret[sent_size:])
1605
except gnutls.errors.GNUTLSError as error:
1606
logger.warning("gnutls send failed")
1607
return
1608
logger.debug("Sent: %d, remaining: %d",
1609
sent, len(client.secret)
1610
- (sent_size + sent))
1611
sent_size += sent
1612
2375
2376
try:
2377
session.send(client.secret)
2378
except gnutls.Error as error:
2379
logger.warning("gnutls send failed",
2380
exc_info=error)
2381
return
2382
1613
2383
logger.info("Sending secret to %s", client.name)
1614
2384
# bump the timeout using extended_timeout
1615
client.checked_ok(client.extended_timeout)
2385
client.bump_timeout(client.extended_timeout)
1616
2386
if self.server.use_dbus:
1617
2387
# Emit D-Bus signal
1618
2388
client.GotSecret()
1619
2389
1620
2390
finally:
1621
2391
if approval_required:
1622
2392
client.approvals_pending -= 1
1623
2393
try:
1624
2394
session.bye()
1625
except gnutls.errors.GNUTLSError as error:
1626
logger.warning("GnuTLS bye failed")
1627
2395
except gnutls.Error as error:
2396
logger.warning("GnuTLS bye failed",
2397
exc_info=error)
2398
1628
2399
@staticmethod
1629
2400
def peer_certificate(session):
1630
"Return the peer's OpenPGP certificate as a bytestring"
1631
# If not an OpenPGP certificate...
1632
if (gnutls.library.functions
1633
.gnutls_certificate_type_get(session._c_object)
1634
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1635
# ...do the normal thing
1636
return session.peer_certificate
2401
"Return the peer's certificate as a bytestring"
2402
try:
2403
cert_type = gnutls.certificate_type_get2(session._c_object,
2404
gnutls.CTYPE_PEERS)
2405
except AttributeError:
2406
cert_type = gnutls.certificate_type_get(session._c_object)
2407
if gnutls.has_rawpk:
2408
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2409
else:
2410
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2411
# If not a valid certificate type...
2412
if cert_type not in valid_cert_types:
2413
logger.info("Cert type %r not in %r", cert_type,
2414
valid_cert_types)
2415
# ...return invalid data
2416
return b""
1637
2417
list_size = ctypes.c_uint(1)
1638
cert_list = (gnutls.library.functions
1639
.gnutls_certificate_get_peers
2418
cert_list = (gnutls.certificate_get_peers
1640
2419
(session._c_object, ctypes.byref(list_size)))
1641
2420
if not bool(cert_list) and list_size.value != 0:
1642
raise gnutls.errors.GNUTLSError("error getting peer"
1643
" certificate")
2421
raise gnutls.Error("error getting peer certificate")
1644
2422
if list_size.value == 0:
1645
2423
return None
1646
2424
cert = cert_list[0]
1647
2425
return ctypes.string_at(cert.data, cert.size)
1648
2426
2427
@staticmethod
2428
def key_id(certificate):
2429
"Convert a certificate bytestring to a hexdigit key ID"
2430
# New GnuTLS "datum" with the public key
2431
datum = gnutls.datum_t(
2432
ctypes.cast(ctypes.c_char_p(certificate),
2433
ctypes.POINTER(ctypes.c_ubyte)),
2434
ctypes.c_uint(len(certificate)))
2435
# XXX all these need to be created in the gnutls "module"
2436
# New empty GnuTLS certificate
2437
pubkey = gnutls.pubkey_t()
2438
gnutls.pubkey_init(ctypes.byref(pubkey))
2439
# Import the raw public key into the certificate
2440
gnutls.pubkey_import(pubkey,
2441
ctypes.byref(datum),
2442
gnutls.X509_FMT_DER)
2443
# New buffer for the key ID
2444
buf = ctypes.create_string_buffer(32)
2445
buf_len = ctypes.c_size_t(len(buf))
2446
# Get the key ID from the raw public key into the buffer
2447
gnutls.pubkey_get_key_id(pubkey,
2448
gnutls.KEYID_USE_SHA256,
2449
ctypes.cast(ctypes.byref(buf),
2450
ctypes.POINTER(ctypes.c_ubyte)),
2451
ctypes.byref(buf_len))
2452
# Deinit the certificate
2453
gnutls.pubkey_deinit(pubkey)
2454
2455
# Convert the buffer to a Python bytestring
2456
key_id = ctypes.string_at(buf, buf_len.value)
2457
# Convert the bytestring to hexadecimal notation
2458
hex_key_id = binascii.hexlify(key_id).upper()
2459
return hex_key_id
2460
1649
2461
@staticmethod
1650
2462
def fingerprint(openpgp):
1651
2463
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1652
2464
# New GnuTLS "datum" with the OpenPGP public key
1653
datum = (gnutls.library.types
1654
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1655
ctypes.POINTER
1656
(ctypes.c_ubyte)),
1657
ctypes.c_uint(len(openpgp))))
2465
datum = gnutls.datum_t(
2466
ctypes.cast(ctypes.c_char_p(openpgp),
2467
ctypes.POINTER(ctypes.c_ubyte)),
2468
ctypes.c_uint(len(openpgp)))
1658
2469
# New empty GnuTLS certificate
1659
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1660
(gnutls.library.functions
1661
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2470
crt = gnutls.openpgp_crt_t()
2471
gnutls.openpgp_crt_init(ctypes.byref(crt))
1662
2472
# Import the OpenPGP public key into the certificate
1663
(gnutls.library.functions
1664
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1665
gnutls.library.constants
1666
.GNUTLS_OPENPGP_FMT_RAW))
2473
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2474
gnutls.OPENPGP_FMT_RAW)
1667
2475
# Verify the self signature in the key
1668
2476
crtverify = ctypes.c_uint()
1669
(gnutls.library.functions
1670
.gnutls_openpgp_crt_verify_self(crt, 0,
1671
ctypes.byref(crtverify)))
2477
gnutls.openpgp_crt_verify_self(crt, 0,
2478
ctypes.byref(crtverify))
1672
2479
if crtverify.value != 0:
1673
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1674
raise (gnutls.errors.CertificateSecurityError
1675
("Verify failed"))
2480
gnutls.openpgp_crt_deinit(crt)
2481
raise gnutls.CertificateSecurityError(code
2482
=crtverify.value)
1676
2483
# New buffer for the fingerprint
1677
2484
buf = ctypes.create_string_buffer(20)
1678
2485
buf_len = ctypes.c_size_t()
1679
2486
# Get the fingerprint from the certificate into the buffer
1680
(gnutls.library.functions
1681
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1682
ctypes.byref(buf_len)))
2487
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2488
ctypes.byref(buf_len))
1683
2489
# Deinit the certificate
1684
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2490
gnutls.openpgp_crt_deinit(crt)
1685
2491
# Convert the buffer to a Python bytestring
1686
2492
fpr = ctypes.string_at(buf, buf_len.value)
1687
2493
# Convert the bytestring to hexadecimal notation
1689
2495
return hex_fpr
1690
2496
1691
2497
1692
class MultiprocessingMixIn(object):
2498
class MultiprocessingMixIn:
1693
2499
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2500
1694
2501
def sub_process_main(self, request, address):
1695
2502
try:
1696
2503
self.finish_request(request, address)
1697
2504
except Exception:
1698
2505
self.handle_error(request, address)
1699
2506
self.close_request(request)
1700
2507
1701
2508
def process_request(self, request, address):
1702
2509
"""Start a new process to process the request."""
1703
proc = multiprocessing.Process(target = self.sub_process_main,
1704
args = (request,
1705
address))
2510
proc = multiprocessing.Process(target=self.sub_process_main,
2511
args=(request, address))
1706
2512
proc.start()
1707
2513
return proc
1708
2514
1709
2515
1710
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2516
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
1711
2517
""" adds a pipe to the MixIn """
2518
1712
2519
def process_request(self, request, client_address):
1713
2520
"""Overrides and wraps the original process_request().
1714
2521
1715
2522
This function creates a new pipe in self.pipe
1716
2523
"""
1717
2524
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1718
2525
1719
2526
proc = MultiprocessingMixIn.process_request(self, request,
1720
2527
client_address)
1721
2528
self.child_pipe.close()
1722
2529
self.add_pipe(parent_pipe, proc)
1723
2530
1724
2531
def add_pipe(self, parent_pipe, proc):
1725
2532
"""Dummy function; override as necessary"""
1726
raise NotImplementedError
2533
raise NotImplementedError()
1727
2534
1728
2535
1729
2536
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1730
socketserver.TCPServer, object):
2537
socketserver.TCPServer):
1731
2538
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1732
2539
1733
2540
Attributes:
1734
2541
enabled: Boolean; whether this server is activated yet
1735
2542
interface: None or a network interface name (string)
1736
2543
use_ipv6: Boolean; to use IPv6 or not
1737
2544
"""
2545
1738
2546
def __init__(self, server_address, RequestHandlerClass,
1739
interface=None, use_ipv6=True):
2547
interface=None,
2548
use_ipv6=True,
2549
socketfd=None):
2550
"""If socketfd is set, use that file descriptor instead of
2551
creating a new one with socket.socket().
2552
"""
1740
2553
self.interface = interface
1741
2554
if use_ipv6:
1742
2555
self.address_family = socket.AF_INET6
2556
if socketfd is not None:
2557
# Save the file descriptor
2558
self.socketfd = socketfd
2559
# Save the original socket.socket() function
2560
self.socket_socket = socket.socket
2561
2562
# To implement --socket, we monkey patch socket.socket.
2563
#
2564
# (When socketserver.TCPServer is a new-style class, we
2565
# could make self.socket into a property instead of monkey
2566
# patching socket.socket.)
2567
#
2568
# Create a one-time-only replacement for socket.socket()
2569
@functools.wraps(socket.socket)
2570
def socket_wrapper(*args, **kwargs):
2571
# Restore original function so subsequent calls are
2572
# not affected.
2573
socket.socket = self.socket_socket
2574
del self.socket_socket
2575
# This time only, return a new socket object from the
2576
# saved file descriptor.
2577
return socket.fromfd(self.socketfd, *args, **kwargs)
2578
# Replace socket.socket() function with wrapper
2579
socket.socket = socket_wrapper
2580
# The socketserver.TCPServer.__init__ will call
2581
# socket.socket(), which might be our replacement,
2582
# socket_wrapper(), if socketfd was set.
1743
2583
socketserver.TCPServer.__init__(self, server_address,
1744
2584
RequestHandlerClass)
2585
1745
2586
def server_bind(self):
1746
2587
"""This overrides the normal server_bind() function
1747
2588
to bind to an interface if one was specified, and also NOT to
1748
2589
bind to an address or port if they were not specified."""
2590
global SO_BINDTODEVICE
1749
2591
if self.interface is not None:
1750
2592
if SO_BINDTODEVICE is None:
1751
logger.error("SO_BINDTODEVICE does not exist;"
1752
" cannot bind to interface %s",
1753
self.interface)
1754
else:
1755
try:
1756
self.socket.setsockopt(socket.SOL_SOCKET,
1757
SO_BINDTODEVICE,
1758
str(self.interface
1759
+ '\0'))
1760
except socket.error as error:
1761
if error[0] == errno.EPERM:
1762
logger.error("No permission to"
1763
" bind to interface %s",
1764
self.interface)
1765
elif error[0] == errno.ENOPROTOOPT:
1766
logger.error("SO_BINDTODEVICE not available;"
1767
" cannot bind to interface %s",
1768
self.interface)
1769
else:
1770
raise
2593
# Fall back to a hard-coded value which seems to be
2594
# common enough.
2595
logger.warning("SO_BINDTODEVICE not found, trying 25")
2596
SO_BINDTODEVICE = 25
2597
try:
2598
self.socket.setsockopt(
2599
socket.SOL_SOCKET, SO_BINDTODEVICE,
2600
(self.interface + "\0").encode("utf-8"))
2601
except socket.error as error:
2602
if error.errno == errno.EPERM:
2603
logger.error("No permission to bind to"
2604
" interface %s", self.interface)
2605
elif error.errno == errno.ENOPROTOOPT:
2606
logger.error("SO_BINDTODEVICE not available;"
2607
" cannot bind to interface %s",
2608
self.interface)
2609
elif error.errno == errno.ENODEV:
2610
logger.error("Interface %s does not exist,"
2611
" cannot bind", self.interface)
2612
else:
2613
raise
1771
2614
# Only bind(2) the socket if we really need to.
1772
2615
if self.server_address[0] or self.server_address[1]:
2616
if self.server_address[1]:
2617
self.allow_reuse_address = True
1773
2618
if not self.server_address[0]:
1774
2619
if self.address_family == socket.AF_INET6:
1775
any_address = "::" # in6addr_any
2620
any_address = "::" # in6addr_any
1776
2621
else:
1777
any_address = socket.INADDR_ANY
2622
any_address = "0.0.0.0" # INADDR_ANY
1778
2623
self.server_address = (any_address,
1779
2624
self.server_address[1])
1780
2625
elif not self.server_address[1]:
1781
self.server_address = (self.server_address[0],
1782
0)
2626
self.server_address = (self.server_address[0], 0)
1783
2627
# if self.interface:
1784
2628
# self.server_address = (self.server_address[0],
1785
2629
# 0, # port
1791
2635
1792
2636
class MandosServer(IPv6_TCPServer):
1793
2637
"""Mandos server.
1794
2638
1795
2639
Attributes:
1796
2640
clients: set of Client objects
1797
2641
gnutls_priority GnuTLS priority string
1798
2642
use_dbus: Boolean; to emit D-Bus signals or not
1799
1800
Assumes a gobject.MainLoop event loop.
2643
2644
Assumes a GLib.MainLoop event loop.
1801
2645
"""
2646
1802
2647
def __init__(self, server_address, RequestHandlerClass,
1803
interface=None, use_ipv6=True, clients=None,
1804
gnutls_priority=None, use_dbus=True):
2648
interface=None,
2649
use_ipv6=True,
2650
clients=None,
2651
gnutls_priority=None,
2652
use_dbus=True,
2653
socketfd=None):
1805
2654
self.enabled = False
1806
2655
self.clients = clients
1807
2656
if self.clients is None:
1810
2659
self.gnutls_priority = gnutls_priority
1811
2660
IPv6_TCPServer.__init__(self, server_address,
1812
2661
RequestHandlerClass,
1813
interface = interface,
1814
use_ipv6 = use_ipv6)
2662
interface=interface,
2663
use_ipv6=use_ipv6,
2664
socketfd=socketfd)
2665
1815
2666
def server_activate(self):
1816
2667
if self.enabled:
1817
2668
return socketserver.TCPServer.server_activate(self)
1818
2669
1819
2670
def enable(self):
1820
2671
self.enabled = True
1821
2672
1822
2673
def add_pipe(self, parent_pipe, proc):
1823
2674
# Call "handle_ipc" for both data and EOF events
1824
gobject.io_add_watch(parent_pipe.fileno(),
1825
gobject.IO_IN | gobject.IO_HUP,
1826
functools.partial(self.handle_ipc,
1827
parent_pipe =
1828
parent_pipe,
1829
proc = proc))
1830
1831
def handle_ipc(self, source, condition, parent_pipe=None,
1832
proc = None, client_object=None):
1833
condition_names = {
1834
gobject.IO_IN: "IN", # There is data to read.
1835
gobject.IO_OUT: "OUT", # Data can be written (without
1836
# blocking).
1837
gobject.IO_PRI: "PRI", # There is urgent data to read.
1838
gobject.IO_ERR: "ERR", # Error condition.
1839
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1840
# broken, usually for pipes and
1841
# sockets).
1842
}
1843
conditions_string = ' | '.join(name
1844
for cond, name in
1845
condition_names.iteritems()
1846
if cond & condition)
2675
GLib.io_add_watch(
2676
parent_pipe.fileno(),
2677
GLib.IO_IN | GLib.IO_HUP,
2678
functools.partial(self.handle_ipc,
2679
parent_pipe=parent_pipe,
2680
proc=proc))
2681
2682
def handle_ipc(self, source, condition,
2683
parent_pipe=None,
2684
proc=None,
2685
client_object=None):
1847
2686
# error, or the other end of multiprocessing.Pipe has closed
1848
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2687
if condition & (GLib.IO_ERR | GLib.IO_HUP):
1849
2688
# Wait for other process to exit
1850
2689
proc.join()
1851
2690
return False
1852
2691
1853
2692
# Read a request from the child
1854
2693
request = parent_pipe.recv()
1855
2694
command = request[0]
1856
2695
1857
2696
if command == 'init':
1858
fpr = request[1]
1859
address = request[2]
1860
1861
for c in self.clients.itervalues():
1862
if c.fingerprint == fpr:
2697
key_id = request[1].decode("ascii")
2698
fpr = request[2].decode("ascii")
2699
address = request[3]
2700
2701
for c in self.clients.values():
2702
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2703
continue
2704
if key_id and c.key_id == key_id:
2705
client = c
2706
break
2707
if fpr and c.fingerprint == fpr:
1863
2708
client = c
1864
2709
break
1865
2710
else:
1866
logger.info("Client not found for fingerprint: %s, ad"
1867
"dress: %s", fpr, address)
2711
logger.info("Client not found for key ID: %s, address"
2712
": %s", key_id or fpr, address)
1868
2713
if self.use_dbus:
1869
2714
# Emit D-Bus signal
1870
mandos_dbus_service.ClientNotFound(fpr,
2715
mandos_dbus_service.ClientNotFound(key_id or fpr,
1871
2716
address[0])
1872
2717
parent_pipe.send(False)
1873
2718
return False
1874
1875
gobject.io_add_watch(parent_pipe.fileno(),
1876
gobject.IO_IN | gobject.IO_HUP,
1877
functools.partial(self.handle_ipc,
1878
parent_pipe =
1879
parent_pipe,
1880
proc = proc,
1881
client_object =
1882
client))
2719
2720
GLib.io_add_watch(
2721
parent_pipe.fileno(),
2722
GLib.IO_IN | GLib.IO_HUP,
2723
functools.partial(self.handle_ipc,
2724
parent_pipe=parent_pipe,
2725
proc=proc,
2726
client_object=client))
1883
2727
parent_pipe.send(True)
1884
2728
# remove the old hook in favor of the new above hook on
1885
2729
# same fileno
1888
2732
funcname = request[1]
1889
2733
args = request[2]
1890
2734
kwargs = request[3]
1891
2735
1892
2736
parent_pipe.send(('data', getattr(client_object,
1893
2737
funcname)(*args,
1894
**kwargs)))
1895
2738
**kwargs)))
2739
1896
2740
if command == 'getattr':
1897
2741
attrname = request[1]
1898
if callable(client_object.__getattribute__(attrname)):
1899
parent_pipe.send(('function',))
2742
if isinstance(client_object.__getattribute__(attrname),
2743
collections.Callable):
2744
parent_pipe.send(('function', ))
1900
2745
else:
1901
parent_pipe.send(('data', client_object
1902
.__getattribute__(attrname)))
1903
2746
parent_pipe.send((
2747
'data', client_object.__getattribute__(attrname)))
2748
1904
2749
if command == 'setattr':
1905
2750
attrname = request[1]
1906
2751
value = request[2]
1907
2752
setattr(client_object, attrname, value)
1908
2753
1909
2754
return True
1910
2755
1911
2756
2757
def rfc3339_duration_to_delta(duration):
2758
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2759
2760
>>> rfc3339_duration_to_delta("P7D")
2761
datetime.timedelta(7)
2762
>>> rfc3339_duration_to_delta("PT60S")
2763
datetime.timedelta(0, 60)
2764
>>> rfc3339_duration_to_delta("PT60M")
2765
datetime.timedelta(0, 3600)
2766
>>> rfc3339_duration_to_delta("PT24H")
2767
datetime.timedelta(1)
2768
>>> rfc3339_duration_to_delta("P1W")
2769
datetime.timedelta(7)
2770
>>> rfc3339_duration_to_delta("PT5M30S")
2771
datetime.timedelta(0, 330)
2772
>>> rfc3339_duration_to_delta("P1DT3M20S")
2773
datetime.timedelta(1, 200)
2774
"""
2775
2776
# Parsing an RFC 3339 duration with regular expressions is not
2777
# possible - there would have to be multiple places for the same
2778
# values, like seconds. The current code, while more esoteric, is
2779
# cleaner without depending on a parsing library. If Python had a
2780
# built-in library for parsing we would use it, but we'd like to
2781
# avoid excessive use of external libraries.
2782
2783
# New type for defining tokens, syntax, and semantics all-in-one
2784
Token = collections.namedtuple("Token", (
2785
"regexp", # To match token; if "value" is not None, must have
2786
# a "group" containing digits
2787
"value", # datetime.timedelta or None
2788
"followers")) # Tokens valid after this token
2789
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2790
# the "duration" ABNF definition in RFC 3339, Appendix A.
2791
token_end = Token(re.compile(r"$"), None, frozenset())
2792
token_second = Token(re.compile(r"(\d+)S"),
2793
datetime.timedelta(seconds=1),
2794
frozenset((token_end, )))
2795
token_minute = Token(re.compile(r"(\d+)M"),
2796
datetime.timedelta(minutes=1),
2797
frozenset((token_second, token_end)))
2798
token_hour = Token(re.compile(r"(\d+)H"),
2799
datetime.timedelta(hours=1),
2800
frozenset((token_minute, token_end)))
2801
token_time = Token(re.compile(r"T"),
2802
None,
2803
frozenset((token_hour, token_minute,
2804
token_second)))
2805
token_day = Token(re.compile(r"(\d+)D"),
2806
datetime.timedelta(days=1),
2807
frozenset((token_time, token_end)))
2808
token_month = Token(re.compile(r"(\d+)M"),
2809
datetime.timedelta(weeks=4),
2810
frozenset((token_day, token_end)))
2811
token_year = Token(re.compile(r"(\d+)Y"),
2812
datetime.timedelta(weeks=52),
2813
frozenset((token_month, token_end)))
2814
token_week = Token(re.compile(r"(\d+)W"),
2815
datetime.timedelta(weeks=1),
2816
frozenset((token_end, )))
2817
token_duration = Token(re.compile(r"P"), None,
2818
frozenset((token_year, token_month,
2819
token_day, token_time,
2820
token_week)))
2821
# Define starting values:
2822
# Value so far
2823
value = datetime.timedelta()
2824
found_token = None
2825
# Following valid tokens
2826
followers = frozenset((token_duration, ))
2827
# String left to parse
2828
s = duration
2829
# Loop until end token is found
2830
while found_token is not token_end:
2831
# Search for any currently valid tokens
2832
for token in followers:
2833
match = token.regexp.match(s)
2834
if match is not None:
2835
# Token found
2836
if token.value is not None:
2837
# Value found, parse digits
2838
factor = int(match.group(1), 10)
2839
# Add to value so far
2840
value += factor * token.value
2841
# Strip token from string
2842
s = token.regexp.sub("", s, 1)
2843
# Go to found token
2844
found_token = token
2845
# Set valid next tokens
2846
followers = found_token.followers
2847
break
2848
else:
2849
# No currently valid tokens were found
2850
raise ValueError("Invalid RFC 3339 duration: {!r}"
2851
.format(duration))
2852
# End token found
2853
return value
2854
2855
1912
2856
def string_to_delta(interval):
1913
2857
"""Parse a string and return a datetime.timedelta
1914
2858
1915
2859
>>> string_to_delta('7d')
1916
2860
datetime.timedelta(7)
1917
2861
>>> string_to_delta('60s')
1925
2869
>>> string_to_delta('5m 30s')
1926
2870
datetime.timedelta(0, 330)
1927
2871
"""
2872
2873
try:
2874
return rfc3339_duration_to_delta(interval)
2875
except ValueError:
2876
pass
2877
1928
2878
timevalue = datetime.timedelta(0)
1929
2879
for s in interval.split():
1930
2880
try:
1931
suffix = unicode(s[-1])
2881
suffix = s[-1]
1932
2882
value = int(s[:-1])
1933
2883
if suffix == "d":
1934
2884
delta = datetime.timedelta(value)
1941
2891
elif suffix == "w":
1942
2892
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1943
2893
else:
1944
raise ValueError("Unknown suffix %r" % suffix)
1945
except (ValueError, IndexError) as e:
2894
raise ValueError("Unknown suffix {!r}".format(suffix))
2895
except IndexError as e:
1946
2896
raise ValueError(*(e.args))
1947
2897
timevalue += delta
1948
2898
return timevalue
1949
2899
1950
2900
1951
def daemon(nochdir = False, noclose = False):
2901
def daemon(nochdir=False, noclose=False):
1952
2902
"""See daemon(3). Standard BSD Unix function.
1953
2903
1954
2904
This should really exist as os.daemon, but it doesn't (yet)."""
1955
2905
if os.fork():
1956
2906
sys.exit()
1961
2911
sys.exit()
1962
2912
if not noclose:
1963
2913
# Close all standard open file descriptors
1964
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2914
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1965
2915
if not stat.S_ISCHR(os.fstat(null).st_mode):
1966
2916
raise OSError(errno.ENODEV,
1967
"%s not a character device"
1968
% os.path.devnull)
2917
"{} not a character device"
2918
.format(os.devnull))
1969
2919
os.dup2(null, sys.stdin.fileno())
1970
2920
os.dup2(null, sys.stdout.fileno())
1971
2921
os.dup2(null, sys.stderr.fileno())
1974
2924
1975
2925
1976
2926
def main():
1977
2927
1978
2928
##################################################################
1979
2929
# Parsing of options, both command line and config file
1980
2930
1981
2931
parser = argparse.ArgumentParser()
1982
2932
parser.add_argument("-v", "--version", action="version",
1983
version = "%%(prog)s %s" % version,
2933
version="%(prog)s {}".format(version),
1984
2934
help="show version number and exit")
1985
2935
parser.add_argument("-i", "--interface", metavar="IF",
1986
2936
help="Bind to interface IF")
1992
2942
help="Run self-test")
1993
2943
parser.add_argument("--debug", action="store_true",
1994
2944
help="Debug mode; run in foreground and log"
1995
" to terminal")
2945
" to terminal", default=None)
1996
2946
parser.add_argument("--debuglevel", metavar="LEVEL",
1997
2947
help="Debug level for stdout output")
1998
2948
parser.add_argument("--priority", help="GnuTLS"
2005
2955
" files")
2006
2956
parser.add_argument("--no-dbus", action="store_false",
2007
2957
dest="use_dbus", help="Do not provide D-Bus"
2008
" system bus interface")
2958
" system bus interface", default=None)
2009
2959
parser.add_argument("--no-ipv6", action="store_false",
2010
dest="use_ipv6", help="Do not use IPv6")
2960
dest="use_ipv6", help="Do not use IPv6",
2961
default=None)
2011
2962
parser.add_argument("--no-restore", action="store_false",
2012
2963
dest="restore", help="Do not restore stored"
2013
" state")
2964
" state", default=None)
2965
parser.add_argument("--socket", type=int,
2966
help="Specify a file descriptor to a network"
2967
" socket to use instead of creating one")
2014
2968
parser.add_argument("--statedir", metavar="DIR",
2015
2969
help="Directory to save/restore state in")
2016
2970
parser.add_argument("--foreground", action="store_true",
2971
help="Run in foreground", default=None)
2972
parser.add_argument("--no-zeroconf", action="store_false",
2973
dest="zeroconf", help="Do not use Zeroconf",
2974
default=None)
2975
2017
2976
options = parser.parse_args()
2018
2977
2019
2978
if options.check:
2020
2979
import doctest
2021
doctest.testmod()
2022
sys.exit()
2023
2980
fail_count, test_count = doctest.testmod()
2981
sys.exit(os.EX_OK if fail_count == 0 else 1)
2982
2024
2983
# Default values for config file for server-global settings
2025
server_defaults = { "interface": "",
2026
"address": "",
2027
"port": "",
2028
"debug": "False",
2029
"priority":
2030
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2031
"servicename": "Mandos",
2032
"use_dbus": "True",
2033
"use_ipv6": "True",
2034
"debuglevel": "",
2035
"restore": "True",
2036
"statedir": "/var/lib/mandos"
2037
}
2038
2984
if gnutls.has_rawpk:
2985
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2986
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2987
else:
2988
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2989
":+SIGN-DSA-SHA256")
2990
server_defaults = {"interface": "",
2991
"address": "",
2992
"port": "",
2993
"debug": "False",
2994
"priority": priority,
2995
"servicename": "Mandos",
2996
"use_dbus": "True",
2997
"use_ipv6": "True",
2998
"debuglevel": "",
2999
"restore": "True",
3000
"socket": "",
3001
"statedir": "/var/lib/mandos",
3002
"foreground": "False",
3003
"zeroconf": "True",
3004
}
3005
del priority
3006
2039
3007
# Parse config file for server-global settings
2040
server_config = configparser.SafeConfigParser(server_defaults)
3008
server_config = configparser.ConfigParser(server_defaults)
2041
3009
del server_defaults
2042
server_config.read(os.path.join(options.configdir,
2043
"mandos.conf"))
2044
# Convert the SafeConfigParser object to a dict
3010
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3011
# Convert the ConfigParser object to a dict
2045
3012
server_settings = server_config.defaults()
2046
3013
# Use the appropriate methods on the non-string config options
2047
for option in ("debug", "use_dbus", "use_ipv6"):
3014
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3015
"foreground", "zeroconf"):
2048
3016
server_settings[option] = server_config.getboolean("DEFAULT",
2049
3017
option)
2050
3018
if server_settings["port"]:
2051
3019
server_settings["port"] = server_config.getint("DEFAULT",
2052
3020
"port")
3021
if server_settings["socket"]:
3022
server_settings["socket"] = server_config.getint("DEFAULT",
3023
"socket")
3024
# Later, stdin will, and stdout and stderr might, be dup'ed
3025
# over with an opened os.devnull. But we don't want this to
3026
# happen with a supplied network socket.
3027
if 0 <= server_settings["socket"] <= 2:
3028
server_settings["socket"] = os.dup(server_settings
3029
["socket"])
2053
3030
del server_config
2054
3031
2055
3032
# Override the settings from the config file with command line
2056
3033
# options, if set.
2057
3034
for option in ("interface", "address", "port", "debug",
2058
"priority", "servicename", "configdir",
2059
"use_dbus", "use_ipv6", "debuglevel", "restore",
2060
"statedir"):
3035
"priority", "servicename", "configdir", "use_dbus",
3036
"use_ipv6", "debuglevel", "restore", "statedir",
3037
"socket", "foreground", "zeroconf"):
2061
3038
value = getattr(options, option)
2062
3039
if value is not None:
2063
3040
server_settings[option] = value
2064
3041
del options
2065
3042
# Force all strings to be unicode
2066
3043
for option in server_settings.keys():
2067
if type(server_settings[option]) is str:
2068
server_settings[option] = unicode(server_settings[option])
3044
if isinstance(server_settings[option], bytes):
3045
server_settings[option] = (server_settings[option]
3046
.decode("utf-8"))
3047
# Force all boolean options to be boolean
3048
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3049
"foreground", "zeroconf"):
3050
server_settings[option] = bool(server_settings[option])
3051
# Debug implies foreground
3052
if server_settings["debug"]:
3053
server_settings["foreground"] = True
2069
3054
# Now we have our good server settings in "server_settings"
2070
3055
2071
3056
##################################################################
2072
3057
3058
if (not server_settings["zeroconf"]
3059
and not (server_settings["port"]
3060
or server_settings["socket"] != "")):
3061
parser.error("Needs port or socket to work without Zeroconf")
3062
2073
3063
# For convenience
2074
3064
debug = server_settings["debug"]
2075
3065
debuglevel = server_settings["debuglevel"]
2077
3067
use_ipv6 = server_settings["use_ipv6"]
2078
3068
stored_state_path = os.path.join(server_settings["statedir"],
2079
3069
stored_state_file)
2080
3070
foreground = server_settings["foreground"]
3071
zeroconf = server_settings["zeroconf"]
3072
2081
3073
if debug:
2082
3074
initlogger(debug, logging.DEBUG)
2083
3075
else:
2086
3078
else:
2087
3079
level = getattr(logging, debuglevel.upper())
2088
3080
initlogger(debug, level)
2089
3081
2090
3082
if server_settings["servicename"] != "Mandos":
2091
syslogger.setFormatter(logging.Formatter
2092
('Mandos (%s) [%%(process)d]:'
2093
' %%(levelname)s: %%(message)s'
2094
% server_settings["servicename"]))
2095
3083
syslogger.setFormatter(
3084
logging.Formatter('Mandos ({}) [%(process)d]:'
3085
' %(levelname)s: %(message)s'.format(
3086
server_settings["servicename"])))
3087
2096
3088
# Parse config file with clients
2097
client_config = configparser.SafeConfigParser(Client.client_defaults)
3089
client_config = configparser.ConfigParser(Client.client_defaults)
2098
3090
client_config.read(os.path.join(server_settings["configdir"],
2099
3091
"clients.conf"))
2100
3092
2101
3093
global mandos_dbus_service
2102
3094
mandos_dbus_service = None
2103
2104
tcp_server = MandosServer((server_settings["address"],
2105
server_settings["port"]),
2106
ClientHandler,
2107
interface=(server_settings["interface"]
2108
or None),
2109
use_ipv6=use_ipv6,
2110
gnutls_priority=
2111
server_settings["priority"],
2112
use_dbus=use_dbus)
2113
if not debug:
2114
pidfilename = "/var/run/mandos.pid"
2115
try:
2116
pidfile = open(pidfilename, "w")
2117
except IOError:
2118
logger.error("Could not open file %r", pidfilename)
2119
2120
try:
2121
uid = pwd.getpwnam("_mandos").pw_uid
2122
gid = pwd.getpwnam("_mandos").pw_gid
2123
except KeyError:
2124
try:
2125
uid = pwd.getpwnam("mandos").pw_uid
2126
gid = pwd.getpwnam("mandos").pw_gid
3095
3096
socketfd = None
3097
if server_settings["socket"] != "":
3098
socketfd = server_settings["socket"]
3099
tcp_server = MandosServer(
3100
(server_settings["address"], server_settings["port"]),
3101
ClientHandler,
3102
interface=(server_settings["interface"] or None),
3103
use_ipv6=use_ipv6,
3104
gnutls_priority=server_settings["priority"],
3105
use_dbus=use_dbus,
3106
socketfd=socketfd)
3107
if not foreground:
3108
pidfilename = "/run/mandos.pid"
3109
if not os.path.isdir("/run/."):
3110
pidfilename = "/var/run/mandos.pid"
3111
pidfile = None
3112
try:
3113
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3114
except IOError as e:
3115
logger.error("Could not open file %r", pidfilename,
3116
exc_info=e)
3117
3118
for name, group in (("_mandos", "_mandos"),
3119
("mandos", "mandos"),
3120
("nobody", "nogroup")):
3121
try:
3122
uid = pwd.getpwnam(name).pw_uid
3123
gid = pwd.getpwnam(group).pw_gid
3124
break
2127
3125
except KeyError:
2128
try:
2129
uid = pwd.getpwnam("nobody").pw_uid
2130
gid = pwd.getpwnam("nobody").pw_gid
2131
except KeyError:
2132
uid = 65534
2133
gid = 65534
3126
continue
3127
else:
3128
uid = 65534
3129
gid = 65534
2134
3130
try:
2135
3131
os.setgid(gid)
2136
3132
os.setuid(uid)
3133
if debug:
3134
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3135
gid))
2137
3136
except OSError as error:
2138
if error[0] != errno.EPERM:
2139
raise error
2140
3137
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3138
.format(uid, gid, os.strerror(error.errno)))
3139
if error.errno != errno.EPERM:
3140
raise
3141
2141
3142
if debug:
2142
3143
# Enable all possible GnuTLS debugging
2143
3144
2144
3145
# "Use a log level over 10 to enable all debugging options."
2145
3146
# - GnuTLS manual
2146
gnutls.library.functions.gnutls_global_set_log_level(11)
2147
2148
@gnutls.library.types.gnutls_log_func
3147
gnutls.global_set_log_level(11)
3148
3149
@gnutls.log_func
2149
3150
def debug_gnutls(level, string):
2150
3151
logger.debug("GnuTLS: %s", string[:-1])
2151
2152
(gnutls.library.functions
2153
.gnutls_global_set_log_function(debug_gnutls))
2154
3152
3153
gnutls.global_set_log_function(debug_gnutls)
3154
2155
3155
# Redirect stdin so all checkers get /dev/null
2156
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3156
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2157
3157
os.dup2(null, sys.stdin.fileno())
2158
3158
if null > 2:
2159
3159
os.close(null)
2160
3160
2161
3161
# Need to fork before connecting to D-Bus
2162
if not debug:
3162
if not foreground:
2163
3163
# Close all input and output, do double fork, etc.
2164
3164
daemon()
2165
2166
gobject.threads_init()
2167
3165
3166
if gi.version_info < (3, 10, 2):
3167
# multiprocessing will use threads, so before we use GLib we
3168
# need to inform GLib that threads will be used.
3169
GLib.threads_init()
3170
2168
3171
global main_loop
2169
3172
# From the Avahi example code
2170
DBusGMainLoop(set_as_default=True )
2171
main_loop = gobject.MainLoop()
3173
DBusGMainLoop(set_as_default=True)
3174
main_loop = GLib.MainLoop()
2172
3175
bus = dbus.SystemBus()
2173
3176
# End of Avahi example code
2174
3177
if use_dbus:
2175
3178
try:
2176
3179
bus_name = dbus.service.BusName("se.recompile.Mandos",
2177
bus, do_not_queue=True)
2178
old_bus_name = (dbus.service.BusName
2179
("se.bsnet.fukt.Mandos", bus,
2180
do_not_queue=True))
2181
except dbus.exceptions.NameExistsException as e:
2182
logger.error(unicode(e) + ", disabling D-Bus")
3180
bus,
3181
do_not_queue=True)
3182
old_bus_name = dbus.service.BusName(
3183
"se.bsnet.fukt.Mandos", bus,
3184
do_not_queue=True)
3185
except dbus.exceptions.DBusException as e:
3186
logger.error("Disabling D-Bus:", exc_info=e)
2183
3187
use_dbus = False
2184
3188
server_settings["use_dbus"] = False
2185
3189
tcp_server.use_dbus = False
2186
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2187
service = AvahiServiceToSyslog(name =
2188
server_settings["servicename"],
2189
servicetype = "_mandos._tcp",
2190
protocol = protocol, bus = bus)
2191
if server_settings["interface"]:
2192
service.interface = (if_nametoindex
2193
(str(server_settings["interface"])))
2194
3190
if zeroconf:
3191
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3192
service = AvahiServiceToSyslog(
3193
name=server_settings["servicename"],
3194
servicetype="_mandos._tcp",
3195
protocol=protocol,
3196
bus=bus)
3197
if server_settings["interface"]:
3198
service.interface = if_nametoindex(
3199
server_settings["interface"].encode("utf-8"))
3200
2195
3201
global multiprocessing_manager
2196
3202
multiprocessing_manager = multiprocessing.Manager()
2197
3203
2198
3204
client_class = Client
2199
3205
if use_dbus:
2200
client_class = functools.partial(ClientDBusTransitional,
2201
bus = bus)
2202
3206
client_class = functools.partial(ClientDBus, bus=bus)
3207
2203
3208
client_settings = Client.config_parser(client_config)
2204
3209
old_client_settings = {}
2205
3210
clients_data = {}
2206
3211
3212
# This is used to redirect stdout and stderr for checker processes
3213
global wnull
3214
wnull = open(os.devnull, "w") # A writable /dev/null
3215
# Only used if server is running in foreground but not in debug
3216
# mode
3217
if debug or not foreground:
3218
wnull.close()
3219
2207
3220
# Get client data and settings from last running state.
2208
3221
if server_settings["restore"]:
2209
3222
try:
2210
3223
with open(stored_state_path, "rb") as stored_state:
2211
clients_data, old_client_settings = (pickle.load
2212
(stored_state))
3224
if sys.version_info.major == 2:
3225
clients_data, old_client_settings = pickle.load(
3226
stored_state)
3227
else:
3228
bytes_clients_data, bytes_old_client_settings = (
3229
pickle.load(stored_state, encoding="bytes"))
3230
# Fix bytes to strings
3231
# clients_data
3232
# .keys()
3233
clients_data = {(key.decode("utf-8")
3234
if isinstance(key, bytes)
3235
else key): value
3236
for key, value in
3237
bytes_clients_data.items()}
3238
del bytes_clients_data
3239
for key in clients_data:
3240
value = {(k.decode("utf-8")
3241
if isinstance(k, bytes) else k): v
3242
for k, v in
3243
clients_data[key].items()}
3244
clients_data[key] = value
3245
# .client_structure
3246
value["client_structure"] = [
3247
(s.decode("utf-8")
3248
if isinstance(s, bytes)
3249
else s) for s in
3250
value["client_structure"]]
3251
# .name & .host
3252
for k in ("name", "host"):
3253
if isinstance(value[k], bytes):
3254
value[k] = value[k].decode("utf-8")
3255
if "key_id" not in value:
3256
value["key_id"] = ""
3257
elif "fingerprint" not in value:
3258
value["fingerprint"] = ""
3259
# old_client_settings
3260
# .keys()
3261
old_client_settings = {
3262
(key.decode("utf-8")
3263
if isinstance(key, bytes)
3264
else key): value
3265
for key, value in
3266
bytes_old_client_settings.items()}
3267
del bytes_old_client_settings
3268
# .host
3269
for value in old_client_settings.values():
3270
if isinstance(value["host"], bytes):
3271
value["host"] = (value["host"]
3272
.decode("utf-8"))
2213
3273
os.remove(stored_state_path)
2214
3274
except IOError as e:
2215
logger.warning("Could not load persistent state: {0}"
2216
.format(e))
2217
if e.errno != errno.ENOENT:
3275
if e.errno == errno.ENOENT:
3276
logger.warning("Could not load persistent state:"
3277
" {}".format(os.strerror(e.errno)))
3278
else:
3279
logger.critical("Could not load persistent state:",
3280
exc_info=e)
2218
3281
raise
2219
3282
except EOFError as e:
2220
3283
logger.warning("Could not load persistent state: "
2221
"EOFError: {0}".format(e))
2222
3284
"EOFError:",
3285
exc_info=e)
3286
2223
3287
with PGPEngine() as pgp:
2224
for client_name, client in clients_data.iteritems():
3288
for client_name, client in clients_data.items():
3289
# Skip removed clients
3290
if client_name not in client_settings:
3291
continue
3292
2225
3293
# Decide which value to use after restoring saved state.
2226
3294
# We have three different values: Old config file,
2227
3295
# new config file, and saved state.
2232
3300
# For each value in new config, check if it
2233
3301
# differs from the old config value (Except for
2234
3302
# the "secret" attribute)
2235
if (name != "secret" and
2236
value != old_client_settings[client_name]
2237
[name]):
3303
if (name != "secret"
3304
and (value !=
3305
old_client_settings[client_name][name])):
2238
3306
client[name] = value
2239
3307
except KeyError:
2240
3308
pass
2241
3309
2242
3310
# Clients who has passed its expire date can still be
2243
# enabled if its last checker was successful. Clients
2244
# whose checker failed before we stored its state is
2245
# assumed to have failed all checkers during downtime.
3311
# enabled if its last checker was successful. A Client
3312
# whose checker succeeded before we stored its state is
3313
# assumed to have successfully run all checkers during
3314
# downtime.
2246
3315
if client["enabled"]:
2247
3316
if datetime.datetime.utcnow() >= client["expires"]:
2248
3317
if not client["last_checked_ok"]:
2249
3318
logger.warning(
2250
"disabling client {0} - Client never "
2251
"performed a successfull checker"
2252
.format(client["name"]))
3319
"disabling client {} - Client never "
3320
"performed a successful checker".format(
3321
client_name))
2253
3322
client["enabled"] = False
2254
3323
elif client["last_checker_status"] != 0:
2255
3324
logger.warning(
2256
"disabling client {0} - Client "
2257
"last checker failed with error code {1}"
2258
.format(client["name"],
2259
client["last_checker_status"]))
3325
"disabling client {} - Client last"
3326
" checker failed with error code"
3327
" {}".format(
3328
client_name,
3329
client["last_checker_status"]))
2260
3330
client["enabled"] = False
2261
3331
else:
2262
client["expires"] = (datetime.datetime
2263
.utcnow()
2264
+ client["timeout"])
2265
3332
client["expires"] = (
3333
datetime.datetime.utcnow()
3334
+ client["timeout"])
3335
logger.debug("Last checker succeeded,"
3336
" keeping {} enabled".format(
3337
client_name))
2266
3338
try:
2267
client["secret"] = (
2268
pgp.decrypt(client["encrypted_secret"],
2269
client_settings[client_name]
2270
["secret"]))
3339
client["secret"] = pgp.decrypt(
3340
client["encrypted_secret"],
3341
client_settings[client_name]["secret"])
2271
3342
except PGPError:
2272
3343
# If decryption fails, we use secret from new settings
2273
logger.debug("Failed to decrypt {0} old secret"
2274
.format(client_name))
2275
client["secret"] = (
2276
client_settings[client_name]["secret"])
3344
logger.debug("Failed to decrypt {} old secret".format(
3345
client_name))
3346
client["secret"] = (client_settings[client_name]
3347
["secret"])
2277
3348
2278
2279
3349
# Add/remove clients based on new changes made to config
2280
for client_name in set(old_client_settings) - set(client_settings):
3350
for client_name in (set(old_client_settings)
3351
- set(client_settings)):
2281
3352
del clients_data[client_name]
2282
for client_name in set(client_settings) - set(old_client_settings):
3353
for client_name in (set(client_settings)
3354
- set(old_client_settings)):
2283
3355
clients_data[client_name] = client_settings[client_name]
2284
3356
2285
# Create clients all clients
2286
for client_name, client in clients_data.iteritems():
3357
# Create all client objects
3358
for client_name, client in clients_data.items():
2287
3359
tcp_server.clients[client_name] = client_class(
2288
name = client_name, settings = client)
2289
3360
name=client_name,
3361
settings=client,
3362
server_settings=server_settings)
3363
2290
3364
if not tcp_server.clients:
2291
3365
logger.warning("No clients defined")
2292
2293
if not debug:
2294
try:
2295
with pidfile:
2296
pid = os.getpid()
2297
pidfile.write(str(pid) + "\n".encode("utf-8"))
2298
del pidfile
2299
except IOError:
2300
logger.error("Could not write to file %r with PID %d",
2301
pidfilename, pid)
2302
except NameError:
2303
# "pidfile" was never created
2304
pass
3366
3367
if not foreground:
3368
if pidfile is not None:
3369
pid = os.getpid()
3370
try:
3371
with pidfile:
3372
print(pid, file=pidfile)
3373
except IOError:
3374
logger.error("Could not write to file %r with PID %d",
3375
pidfilename, pid)
3376
del pidfile
2305
3377
del pidfilename
2306
signal.signal(signal.SIGINT, signal.SIG_IGN)
2307
2308
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2309
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2310
3378
3379
for termsig in (signal.SIGHUP, signal.SIGTERM):
3380
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3381
lambda: main_loop.quit() and False)
3382
2311
3383
if use_dbus:
2312
class MandosDBusService(dbus.service.Object):
3384
3385
@alternate_dbus_interfaces(
3386
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3387
class MandosDBusService(DBusObjectWithObjectManager):
2313
3388
"""A D-Bus proxy object"""
3389
2314
3390
def __init__(self):
2315
3391
dbus.service.Object.__init__(self, bus, "/")
3392
2316
3393
_interface = "se.recompile.Mandos"
2317
3394
2318
3395
@dbus.service.signal(_interface, signature="o")
2319
3396
def ClientAdded(self, objpath):
2320
3397
"D-Bus signal"
2321
3398
pass
2322
3399
2323
3400
@dbus.service.signal(_interface, signature="ss")
2324
def ClientNotFound(self, fingerprint, address):
3401
def ClientNotFound(self, key_id, address):
2325
3402
"D-Bus signal"
2326
3403
pass
2327
3404
3405
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3406
"true"})
2328
3407
@dbus.service.signal(_interface, signature="os")
2329
3408
def ClientRemoved(self, objpath, name):
2330
3409
"D-Bus signal"
2331
3410
pass
2332
3411
3412
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3413
"true"})
2333
3414
@dbus.service.method(_interface, out_signature="ao")
2334
3415
def GetAllClients(self):
2335
3416
"D-Bus method"
2336
return dbus.Array(c.dbus_object_path
2337
for c in
2338
tcp_server.clients.itervalues())
2339
3417
return dbus.Array(c.dbus_object_path for c in
3418
tcp_server.clients.values())
3419
3420
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3421
"true"})
2340
3422
@dbus.service.method(_interface,
2341
3423
out_signature="a{oa{sv}}")
2342
3424
def GetAllClientsWithProperties(self):
2343
3425
"D-Bus method"
2344
3426
return dbus.Dictionary(
2345
((c.dbus_object_path, c.GetAll(""))
2346
for c in tcp_server.clients.itervalues()),
3427
{c.dbus_object_path: c.GetAll(
3428
"se.recompile.Mandos.Client")
3429
for c in tcp_server.clients.values()},
2347
3430
signature="oa{sv}")
2348
3431
2349
3432
@dbus.service.method(_interface, in_signature="o")
2350
3433
def RemoveClient(self, object_path):
2351
3434
"D-Bus method"
2352
for c in tcp_server.clients.itervalues():
3435
for c in tcp_server.clients.values():
2353
3436
if c.dbus_object_path == object_path:
2354
3437
del tcp_server.clients[c.name]
2355
3438
c.remove_from_connection()
2356
# Don't signal anything except ClientRemoved
3439
# Don't signal the disabling
2357
3440
c.disable(quiet=True)
2358
# Emit D-Bus signal
2359
self.ClientRemoved(object_path, c.name)
3441
# Emit D-Bus signal for removal
3442
self.client_removed_signal(c)
2360
3443
return
2361
3444
raise KeyError(object_path)
2362
3445
2363
3446
del _interface
2364
2365
class MandosDBusServiceTransitional(MandosDBusService):
2366
__metaclass__ = AlternateDBusNamesMetaclass
2367
mandos_dbus_service = MandosDBusServiceTransitional()
2368
3447
3448
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3449
out_signature="a{oa{sa{sv}}}")
3450
def GetManagedObjects(self):
3451
"""D-Bus method"""
3452
return dbus.Dictionary(
3453
{client.dbus_object_path:
3454
dbus.Dictionary(
3455
{interface: client.GetAll(interface)
3456
for interface in
3457
client._get_all_interface_names()})
3458
for client in tcp_server.clients.values()})
3459
3460
def client_added_signal(self, client):
3461
"""Send the new standard signal and the old signal"""
3462
if use_dbus:
3463
# New standard signal
3464
self.InterfacesAdded(
3465
client.dbus_object_path,
3466
dbus.Dictionary(
3467
{interface: client.GetAll(interface)
3468
for interface in
3469
client._get_all_interface_names()}))
3470
# Old signal
3471
self.ClientAdded(client.dbus_object_path)
3472
3473
def client_removed_signal(self, client):
3474
"""Send the new standard signal and the old signal"""
3475
if use_dbus:
3476
# New standard signal
3477
self.InterfacesRemoved(
3478
client.dbus_object_path,
3479
client._get_all_interface_names())
3480
# Old signal
3481
self.ClientRemoved(client.dbus_object_path,
3482
client.name)
3483
3484
mandos_dbus_service = MandosDBusService()
3485
3486
# Save modules to variables to exempt the modules from being
3487
# unloaded before the function registered with atexit() is run.
3488
mp = multiprocessing
3489
wn = wnull
3490
2369
3491
def cleanup():
2370
3492
"Cleanup function; run on exit"
2371
service.cleanup()
2372
2373
multiprocessing.active_children()
3493
if zeroconf:
3494
service.cleanup()
3495
3496
mp.active_children()
3497
wn.close()
2374
3498
if not (tcp_server.clients or client_settings):
2375
3499
return
2376
3500
2377
3501
# Store client before exiting. Secrets are encrypted with key
2378
3502
# based on what config file has. If config file is
2379
3503
# removed/edited, old secret will thus be unrecovable.
2380
3504
clients = {}
2381
3505
with PGPEngine() as pgp:
2382
for client in tcp_server.clients.itervalues():
3506
for client in tcp_server.clients.values():
2383
3507
key = client_settings[client.name]["secret"]
2384
3508
client.encrypted_secret = pgp.encrypt(client.secret,
2385
3509
key)
2386
3510
client_dict = {}
2387
3511
2388
3512
# A list of attributes that can not be pickled
2389
3513
# + secret.
2390
exclude = set(("bus", "changedstate", "secret",
2391
"checker"))
2392
for name, typ in (inspect.getmembers
2393
(dbus.service.Object)):
3514
exclude = {"bus", "changedstate", "secret",
3515
"checker", "server_settings"}
3516
for name, typ in inspect.getmembers(dbus.service
3517
.Object):
2394
3518
exclude.add(name)
2395
3519
2396
3520
client_dict["encrypted_secret"] = (client
2397
3521
.encrypted_secret)
2398
3522
for attr in client.client_structure:
2399
3523
if attr not in exclude:
2400
3524
client_dict[attr] = getattr(client, attr)
2401
3525
2402
3526
clients[client.name] = client_dict
2403
3527
del client_settings[client.name]["secret"]
2404
3528
2405
3529
try:
2406
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2407
prefix="clients-",
2408
dir=os.path.dirname
2409
(stored_state_path))
2410
with os.fdopen(tempfd, "wb") as stored_state:
2411
pickle.dump((clients, client_settings), stored_state)
3530
with tempfile.NamedTemporaryFile(
3531
mode='wb',
3532
suffix=".pickle",
3533
prefix='clients-',
3534
dir=os.path.dirname(stored_state_path),
3535
delete=False) as stored_state:
3536
pickle.dump((clients, client_settings), stored_state,
3537
protocol=2)
3538
tempname = stored_state.name
2412
3539
os.rename(tempname, stored_state_path)
2413
3540
except (IOError, OSError) as e:
2414
logger.warning("Could not save persistent state: {0}"
2415
.format(e))
2416
3541
if not debug:
2417
3542
try:
2418
3543
os.remove(tempname)
2419
3544
except NameError:
2420
3545
pass
2421
if e.errno not in set((errno.ENOENT, errno.EACCES,
2422
errno.EEXIST)):
2423
raise e
2424
3546
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3547
logger.warning("Could not save persistent state: {}"
3548
.format(os.strerror(e.errno)))
3549
else:
3550
logger.warning("Could not save persistent state:",
3551
exc_info=e)
3552
raise
3553
2425
3554
# Delete all clients, and settings from config
2426
3555
while tcp_server.clients:
2427
3556
name, client = tcp_server.clients.popitem()
2428
3557
if use_dbus:
2429
3558
client.remove_from_connection()
2430
# Don't signal anything except ClientRemoved
3559
# Don't signal the disabling
2431
3560
client.disable(quiet=True)
3561
# Emit D-Bus signal for removal
2432
3562
if use_dbus:
2433
# Emit D-Bus signal
2434
mandos_dbus_service.ClientRemoved(client
2435
.dbus_object_path,
2436
client.name)
3563
mandos_dbus_service.client_removed_signal(client)
2437
3564
client_settings.clear()
2438
3565
2439
3566
atexit.register(cleanup)
2440
2441
for client in tcp_server.clients.itervalues():
3567
3568
for client in tcp_server.clients.values():
2442
3569
if use_dbus:
2443
# Emit D-Bus signal
2444
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3570
# Emit D-Bus signal for adding
3571
mandos_dbus_service.client_added_signal(client)
2445
3572
# Need to initiate checking of clients
2446
3573
if client.enabled:
2447
3574
client.init_checker()
2448
3575
2449
3576
tcp_server.enable()
2450
3577
tcp_server.server_activate()
2451
3578
2452
3579
# Find out what port we got
2453
service.port = tcp_server.socket.getsockname()[1]
3580
if zeroconf:
3581
service.port = tcp_server.socket.getsockname()[1]
2454
3582
if use_ipv6:
2455
3583
logger.info("Now listening on address %r, port %d,"
2456
" flowinfo %d, scope_id %d"
2457
% tcp_server.socket.getsockname())
3584
" flowinfo %d, scope_id %d",
3585
*tcp_server.socket.getsockname())
2458
3586
else: # IPv4
2459
logger.info("Now listening on address %r, port %d"
2460
% tcp_server.socket.getsockname())
2461
2462
#service.interface = tcp_server.socket.getsockname()[3]
2463
3587
logger.info("Now listening on address %r, port %d",
3588
*tcp_server.socket.getsockname())
3589
3590
# service.interface = tcp_server.socket.getsockname()[3]
3591
2464
3592
try:
2465
# From the Avahi example code
2466
try:
2467
service.activate()
2468
except dbus.exceptions.DBusException as error:
2469
logger.critical("DBusException: %s", error)
2470
cleanup()
2471
sys.exit(1)
2472
# End of Avahi example code
2473
2474
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2475
lambda *args, **kwargs:
2476
(tcp_server.handle_request
2477
(*args[2:], **kwargs) or True))
2478
3593
if zeroconf:
3594
# From the Avahi example code
3595
try:
3596
service.activate()
3597
except dbus.exceptions.DBusException as error:
3598
logger.critical("D-Bus Exception", exc_info=error)
3599
cleanup()
3600
sys.exit(1)
3601
# End of Avahi example code
3602
3603
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3604
lambda *args, **kwargs:
3605
(tcp_server.handle_request
3606
(*args[2:], **kwargs) or True))
3607
2479
3608
logger.debug("Starting main loop")
2480
3609
main_loop.run()
2481
3610
except AvahiError as error:
2482
logger.critical("AvahiError: %s", error)
3611
logger.critical("Avahi Error", exc_info=error)
2483
3612
cleanup()
2484
3613
sys.exit(1)
2485
3614
except KeyboardInterrupt:
2490
3619
# Must run before the D-Bus bus name gets deregistered
2491
3620
cleanup()
2492
3621
3622
2493
3623
if __name__ == '__main__':
2494
3624
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0