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- Committer: Teddy Hogeborn
- Date: 2019-02-11 06:14:29 UTC
- Revision ID: teddy@recompile.se-20190211061429-n6n5zk29iatshlb3
Fix Debian package dependencies
* debian/control (Build-Depends): Changed GnuTLS dependencies to
"libgnutls30 (>= 3.3.0),
libgnutls28-dev (>= 3.6.6) |
libgnutls28-dev (<< 3.6.0)". (We
can't depend on the virtual package
"gnutls-dev", since we need the
version restrictions.)
(Package: mandos/Depends): Remove dependency on libgnutls28-dev
package.
(Package: mandos/Suggests): New; set to "libc6-dev,
c-compiler". (Used to find value of
"SO_BINDTODEVICE").
(Package: mandos-client/Depends): Don't depend on openssl anymore;
instead depend on either a
gnutls-bin (>= 3.6.6) (in which
case TLS key generation will
work), or on libgnutls30 (<<
3.6.0) (in which case TLS key
generation will not be needed).
* debian/control (Build-Depends): Changed GnuTLS dependencies to
"libgnutls30 (>= 3.3.0),
libgnutls28-dev (>= 3.6.6) |
libgnutls28-dev (<< 3.6.0)". (We
can't depend on the virtual package
"gnutls-dev", since we need the
version restrictions.)
(Package: mandos/Depends): Remove dependency on libgnutls28-dev
package.
(Package: mandos/Suggests): New; set to "libc6-dev,
c-compiler". (Used to find value of
"SO_BINDTODEVICE").
(Package: mandos-client/Depends): Don't depend on openssl anymore;
instead depend on either a
gnutls-bin (>= 3.6.6) (in which
case TLS key generation will
work), or on libgnutls30 (<<
3.6.0) (in which case TLS key
generation will not be needed).
- files added:
- bugs.xml
- debian/upstream
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
5
#
5
#
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 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
81
import dbus
70
82
import dbus.service
71
import gobject
72
import avahi
83
from gi.repository import GLib
73
84
from dbus.mainloop.glib import DBusGMainLoop
74
85
import ctypes
75
86
import ctypes.util
76
87
import xml.dom.minidom
77
88
import inspect
78
import GnuPGInterface
79
89
90
# Try to find the value of SO_BINDTODEVICE:
80
91
try:
92
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
93
# newer, and it is also the most natural place for it:
81
94
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
82
95
except AttributeError:
83
96
try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
84
99
from IN import SO_BINDTODEVICE
85
100
except ImportError:
86
SO_BINDTODEVICE = None
87
88
version = "1.4.1"
101
# In Python 2.7 it seems to have been removed entirely.
102
# Try running the C preprocessor:
103
try:
104
cc = subprocess.Popen(["cc", "--language=c", "-E",
105
"/dev/stdin"],
106
stdin=subprocess.PIPE,
107
stdout=subprocess.PIPE)
108
stdout = cc.communicate(
109
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
110
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
111
except (OSError, ValueError, IndexError):
112
# No value found
113
SO_BINDTODEVICE = None
114
115
if sys.version_info.major == 2:
116
str = unicode
117
118
version = "1.8.2"
89
119
stored_state_file = "clients.pickle"
90
120
91
121
logger = logging.getLogger()
92
syslogger = (logging.handlers.SysLogHandler
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
122
syslogger = None
95
123
96
124
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
125
if_nametoindex = ctypes.cdll.LoadLibrary(
126
ctypes.util.find_library("c")).if_nametoindex
100
127
except (OSError, AttributeError):
128
101
129
def if_nametoindex(interface):
102
130
"Get an interface index the hard way, i.e. using fcntl()"
103
131
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
132
with contextlib.closing(socket.socket()) as s:
105
133
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
134
struct.pack(b"16s16x", interface))
135
interface_index = struct.unpack("I", ifreq[16:20])[0]
110
136
return interface_index
111
137
112
138
139
def copy_function(func):
140
"""Make a copy of a function"""
141
if sys.version_info.major == 2:
142
return types.FunctionType(func.func_code,
143
func.func_globals,
144
func.func_name,
145
func.func_defaults,
146
func.func_closure)
147
else:
148
return types.FunctionType(func.__code__,
149
func.__globals__,
150
func.__name__,
151
func.__defaults__,
152
func.__closure__)
153
154
113
155
def initlogger(debug, level=logging.WARNING):
114
156
"""init logger and add loglevel"""
115
157
158
global syslogger
159
syslogger = (logging.handlers.SysLogHandler(
160
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
161
address="/dev/log"))
116
162
syslogger.setFormatter(logging.Formatter
117
163
('Mandos [%(process)d]: %(levelname)s:'
118
164
' %(message)s'))
119
165
logger.addHandler(syslogger)
120
166
121
167
if debug:
122
168
console = logging.StreamHandler()
123
169
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
135
181
136
182
class PGPEngine(object):
137
183
"""A simple class for OpenPGP symmetric encryption & decryption"""
184
138
185
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
140
186
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
141
self.gnupg = GnuPGInterface.GnuPG()
142
self.gnupg.options.meta_interactive = False
143
self.gnupg.options.homedir = self.tempdir
144
self.gnupg.options.extra_args.extend(['--force-mdc',
145
'--quiet'])
146
187
self.gpg = "gpg"
188
try:
189
output = subprocess.check_output(["gpgconf"])
190
for line in output.splitlines():
191
name, text, path = line.split(b":")
192
if name == "gpg":
193
self.gpg = path
194
break
195
except OSError as e:
196
if e.errno != errno.ENOENT:
197
raise
198
self.gnupgargs = ['--batch',
199
'--homedir', self.tempdir,
200
'--force-mdc',
201
'--quiet']
202
# Only GPG version 1 has the --no-use-agent option.
203
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
204
self.gnupgargs.append("--no-use-agent")
205
147
206
def __enter__(self):
148
207
return self
149
150
def __exit__ (self, exc_type, exc_value, traceback):
208
209
def __exit__(self, exc_type, exc_value, traceback):
151
210
self._cleanup()
152
211
return False
153
212
154
213
def __del__(self):
155
214
self._cleanup()
156
215
157
216
def _cleanup(self):
158
217
if self.tempdir is not None:
159
218
# Delete contents of tempdir
160
219
for root, dirs, files in os.walk(self.tempdir,
161
topdown = False):
220
topdown=False):
162
221
for filename in files:
163
222
os.remove(os.path.join(root, filename))
164
223
for dirname in dirs:
166
225
# Remove tempdir
167
226
os.rmdir(self.tempdir)
168
227
self.tempdir = None
169
228
170
229
def password_encode(self, password):
171
230
# Passphrase can not be empty and can not contain newlines or
172
231
# NUL bytes. So we prefix it and hex encode it.
173
return b"mandos" + binascii.hexlify(password)
174
232
encoded = b"mandos" + binascii.hexlify(password)
233
if len(encoded) > 2048:
234
# GnuPG can't handle long passwords, so encode differently
235
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
236
.replace(b"\n", b"\\n")
237
.replace(b"\0", b"\\x00"))
238
return encoded
239
175
240
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
241
passphrase = self.password_encode(password)
242
with tempfile.NamedTemporaryFile(
243
dir=self.tempdir) as passfile:
244
passfile.write(passphrase)
245
passfile.flush()
246
proc = subprocess.Popen([self.gpg, '--symmetric',
247
'--passphrase-file',
248
passfile.name]
249
+ self.gnupgargs,
250
stdin=subprocess.PIPE,
251
stdout=subprocess.PIPE,
252
stderr=subprocess.PIPE)
253
ciphertext, err = proc.communicate(input=data)
254
if proc.returncode != 0:
255
raise PGPError(err)
190
256
return ciphertext
191
257
192
258
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
259
passphrase = self.password_encode(password)
260
with tempfile.NamedTemporaryFile(
261
dir=self.tempdir) as passfile:
262
passfile.write(passphrase)
263
passfile.flush()
264
proc = subprocess.Popen([self.gpg, '--decrypt',
265
'--passphrase-file',
266
passfile.name]
267
+ self.gnupgargs,
268
stdin=subprocess.PIPE,
269
stdout=subprocess.PIPE,
270
stderr=subprocess.PIPE)
271
decrypted_plaintext, err = proc.communicate(input=data)
272
if proc.returncode != 0:
273
raise PGPError(err)
207
274
return decrypted_plaintext
208
275
209
276
277
# Pretend that we have an Avahi module
278
class Avahi(object):
279
"""This isn't so much a class as it is a module-like namespace.
280
It is instantiated once, and simulates having an Avahi module."""
281
IF_UNSPEC = -1 # avahi-common/address.h
282
PROTO_UNSPEC = -1 # avahi-common/address.h
283
PROTO_INET = 0 # avahi-common/address.h
284
PROTO_INET6 = 1 # avahi-common/address.h
285
DBUS_NAME = "org.freedesktop.Avahi"
286
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
287
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
288
DBUS_PATH_SERVER = "/"
289
290
def string_array_to_txt_array(self, t):
291
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
for s in t), signature="ay")
293
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
294
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
295
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
296
SERVER_INVALID = 0 # avahi-common/defs.h
297
SERVER_REGISTERING = 1 # avahi-common/defs.h
298
SERVER_RUNNING = 2 # avahi-common/defs.h
299
SERVER_COLLISION = 3 # avahi-common/defs.h
300
SERVER_FAILURE = 4 # avahi-common/defs.h
301
avahi = Avahi()
302
210
303
211
304
class AvahiError(Exception):
212
305
def __init__(self, value, *args, **kwargs):
213
306
self.value = value
214
super(AvahiError, self).__init__(value, *args, **kwargs)
215
def __unicode__(self):
216
return unicode(repr(self.value))
307
return super(AvahiError, self).__init__(value, *args,
308
**kwargs)
309
217
310
218
311
class AvahiServiceError(AvahiError):
219
312
pass
220
313
314
221
315
class AvahiGroupError(AvahiError):
222
316
pass
223
317
224
318
225
319
class AvahiService(object):
226
320
"""An Avahi (Zeroconf) service.
227
321
228
322
Attributes:
229
323
interface: integer; avahi.IF_UNSPEC or an interface index.
230
324
Used to optionally bind to the specified interface.
231
325
name: string; Example: 'Mandos'
232
326
type: string; Example: '_mandos._tcp'.
233
See <http://www.dns-sd.org/ServiceTypes.html>
327
See <https://www.iana.org/assignments/service-names-port-numbers>
234
328
port: integer; what port to announce
235
329
TXT: list of strings; TXT record for the service
236
330
domain: string; Domain to publish on, default to .local if empty.
242
336
server: D-Bus Server
243
337
bus: dbus.SystemBus()
244
338
"""
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):
339
340
def __init__(self,
341
interface=avahi.IF_UNSPEC,
342
name=None,
343
servicetype=None,
344
port=None,
345
TXT=None,
346
domain="",
347
host="",
348
max_renames=32768,
349
protocol=avahi.PROTO_UNSPEC,
350
bus=None):
249
351
self.interface = interface
250
352
self.name = name
251
353
self.type = servicetype
260
362
self.server = None
261
363
self.bus = bus
262
364
self.entry_group_state_changed_match = None
263
def rename(self):
365
366
def rename(self, remove=True):
264
367
"""Derived from the Avahi example code"""
265
368
if self.rename_count >= self.max_renames:
266
369
logger.critical("No suitable Zeroconf service name found"
267
370
" after %i retries, exiting.",
268
371
self.rename_count)
269
372
raise AvahiServiceError("Too many renames")
270
self.name = unicode(self.server
271
.GetAlternativeServiceName(self.name))
373
self.name = str(
374
self.server.GetAlternativeServiceName(self.name))
375
self.rename_count += 1
272
376
logger.info("Changing Zeroconf service name to %r ...",
273
377
self.name)
274
self.remove()
378
if remove:
379
self.remove()
275
380
try:
276
381
self.add()
277
382
except dbus.exceptions.DBusException as error:
278
logger.critical("DBusException: %s", error)
279
self.cleanup()
280
os._exit(1)
281
self.rename_count += 1
383
if (error.get_dbus_name()
384
== "org.freedesktop.Avahi.CollisionError"):
385
logger.info("Local Zeroconf service name collision.")
386
return self.rename(remove=False)
387
else:
388
logger.critical("D-Bus Exception", exc_info=error)
389
self.cleanup()
390
os._exit(1)
391
282
392
def remove(self):
283
393
"""Derived from the Avahi example code"""
284
394
if self.entry_group_state_changed_match is not None:
286
396
self.entry_group_state_changed_match = None
287
397
if self.group is not None:
288
398
self.group.Reset()
399
289
400
def add(self):
290
401
"""Derived from the Avahi example code"""
291
402
self.remove()
308
419
dbus.UInt16(self.port),
309
420
avahi.string_array_to_txt_array(self.TXT))
310
421
self.group.Commit()
422
311
423
def entry_group_state_changed(self, state, error):
312
424
"""Derived from the Avahi example code"""
313
425
logger.debug("Avahi entry group state change: %i", state)
314
426
315
427
if state == avahi.ENTRY_GROUP_ESTABLISHED:
316
428
logger.debug("Zeroconf service established.")
317
429
elif state == avahi.ENTRY_GROUP_COLLISION:
319
431
self.rename()
320
432
elif state == avahi.ENTRY_GROUP_FAILURE:
321
433
logger.critical("Avahi: Error in group state changed %s",
322
unicode(error))
323
raise AvahiGroupError("State changed: %s"
324
% unicode(error))
434
str(error))
435
raise AvahiGroupError("State changed: {!s}".format(error))
436
325
437
def cleanup(self):
326
438
"""Derived from the Avahi example code"""
327
439
if self.group is not None:
332
444
pass
333
445
self.group = None
334
446
self.remove()
447
335
448
def server_state_changed(self, state, error=None):
336
449
"""Derived from the Avahi example code"""
337
450
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" }
451
bad_states = {
452
avahi.SERVER_INVALID: "Zeroconf server invalid",
453
avahi.SERVER_REGISTERING: None,
454
avahi.SERVER_COLLISION: "Zeroconf server name collision",
455
avahi.SERVER_FAILURE: "Zeroconf server failure",
456
}
345
457
if state in bad_states:
346
458
if bad_states[state] is not None:
347
459
if error is None:
350
462
logger.error(bad_states[state] + ": %r", error)
351
463
self.cleanup()
352
464
elif state == avahi.SERVER_RUNNING:
353
self.add()
465
try:
466
self.add()
467
except dbus.exceptions.DBusException as error:
468
if (error.get_dbus_name()
469
== "org.freedesktop.Avahi.CollisionError"):
470
logger.info("Local Zeroconf service name"
471
" collision.")
472
return self.rename(remove=False)
473
else:
474
logger.critical("D-Bus Exception", exc_info=error)
475
self.cleanup()
476
os._exit(1)
354
477
else:
355
478
if error is None:
356
479
logger.debug("Unknown state: %r", state)
357
480
else:
358
481
logger.debug("Unknown state: %r: %r", state, error)
482
359
483
def activate(self):
360
484
"""Derived from the Avahi example code"""
361
485
if self.server is None:
365
489
follow_name_owner_changes=True),
366
490
avahi.DBUS_INTERFACE_SERVER)
367
491
self.server.connect_to_signal("StateChanged",
368
self.server_state_changed)
492
self.server_state_changed)
369
493
self.server_state_changed(self.server.GetState())
370
494
495
371
496
class AvahiServiceToSyslog(AvahiService):
372
def rename(self):
497
def rename(self, *args, **kwargs):
373
498
"""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))
499
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
500
syslogger.setFormatter(logging.Formatter(
501
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
502
.format(self.name)))
379
503
return ret
380
504
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
505
506
# Pretend that we have a GnuTLS module
507
class GnuTLS(object):
508
"""This isn't so much a class as it is a module-like namespace.
509
It is instantiated once, and simulates having a GnuTLS module."""
510
511
library = ctypes.util.find_library("gnutls")
512
if library is None:
513
library = ctypes.util.find_library("gnutls-deb0")
514
_library = ctypes.cdll.LoadLibrary(library)
515
del library
516
_need_version = b"3.3.0"
517
_tls_rawpk_version = b"3.6.6"
518
519
def __init__(self):
520
# Need to use "self" here, since this method is called before
521
# the assignment to the "gnutls" global variable happens.
522
if self.check_version(self._need_version) is None:
523
raise self.Error("Needs GnuTLS {} or later"
524
.format(self._need_version))
525
526
# Unless otherwise indicated, the constants and types below are
527
# all from the gnutls/gnutls.h C header file.
528
529
# Constants
530
E_SUCCESS = 0
531
E_INTERRUPTED = -52
532
E_AGAIN = -28
533
CRT_OPENPGP = 2
534
CRT_RAWPK = 3
535
CLIENT = 2
536
SHUT_RDWR = 0
537
CRD_CERTIFICATE = 1
538
E_NO_CERTIFICATE_FOUND = -49
539
X509_FMT_DER = 0
540
NO_TICKETS = 1<<10
541
ENABLE_RAWPK = 1<<18
542
CTYPE_PEERS = 3
543
KEYID_USE_SHA256 = 1 # gnutls/x509.h
544
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
545
546
# Types
547
class session_int(ctypes.Structure):
548
_fields_ = []
549
session_t = ctypes.POINTER(session_int)
550
551
class certificate_credentials_st(ctypes.Structure):
552
_fields_ = []
553
certificate_credentials_t = ctypes.POINTER(
554
certificate_credentials_st)
555
certificate_type_t = ctypes.c_int
556
557
class datum_t(ctypes.Structure):
558
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
559
('size', ctypes.c_uint)]
560
561
class openpgp_crt_int(ctypes.Structure):
562
_fields_ = []
563
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
564
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
565
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
566
credentials_type_t = ctypes.c_int
567
transport_ptr_t = ctypes.c_void_p
568
close_request_t = ctypes.c_int
569
570
# Exceptions
571
class Error(Exception):
572
# We need to use the class name "GnuTLS" here, since this
573
# exception might be raised from within GnuTLS.__init__,
574
# which is called before the assignment to the "gnutls"
575
# global variable has happened.
576
def __init__(self, message=None, code=None, args=()):
577
# Default usage is by a message string, but if a return
578
# code is passed, convert it to a string with
579
# gnutls.strerror()
580
self.code = code
581
if message is None and code is not None:
582
message = GnuTLS.strerror(code)
583
return super(GnuTLS.Error, self).__init__(
584
message, *args)
585
586
class CertificateSecurityError(Error):
587
pass
588
589
# Classes
590
class Credentials(object):
591
def __init__(self):
592
self._c_object = gnutls.certificate_credentials_t()
593
gnutls.certificate_allocate_credentials(
594
ctypes.byref(self._c_object))
595
self.type = gnutls.CRD_CERTIFICATE
596
597
def __del__(self):
598
gnutls.certificate_free_credentials(self._c_object)
599
600
class ClientSession(object):
601
def __init__(self, socket, credentials=None):
602
self._c_object = gnutls.session_t()
603
gnutls_flags = gnutls.CLIENT
604
if gnutls.check_version("3.5.6"):
605
gnutls_flags |= gnutls.NO_TICKETS
606
if gnutls.has_rawpk:
607
gnutls_flags |= gnutls.ENABLE_RAWPK
608
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
609
del gnutls_flags
610
gnutls.set_default_priority(self._c_object)
611
gnutls.transport_set_ptr(self._c_object, socket.fileno())
612
gnutls.handshake_set_private_extensions(self._c_object,
613
True)
614
self.socket = socket
615
if credentials is None:
616
credentials = gnutls.Credentials()
617
gnutls.credentials_set(self._c_object, credentials.type,
618
ctypes.cast(credentials._c_object,
619
ctypes.c_void_p))
620
self.credentials = credentials
621
622
def __del__(self):
623
gnutls.deinit(self._c_object)
624
625
def handshake(self):
626
return gnutls.handshake(self._c_object)
627
628
def send(self, data):
629
data = bytes(data)
630
data_len = len(data)
631
while data_len > 0:
632
data_len -= gnutls.record_send(self._c_object,
633
data[-data_len:],
634
data_len)
635
636
def bye(self):
637
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
638
639
# Error handling functions
640
def _error_code(result):
641
"""A function to raise exceptions on errors, suitable
642
for the 'restype' attribute on ctypes functions"""
643
if result >= 0:
644
return result
645
if result == gnutls.E_NO_CERTIFICATE_FOUND:
646
raise gnutls.CertificateSecurityError(code=result)
647
raise gnutls.Error(code=result)
648
649
def _retry_on_error(result, func, arguments):
650
"""A function to retry on some errors, suitable
651
for the 'errcheck' attribute on ctypes functions"""
652
while result < 0:
653
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
654
return _error_code(result)
655
result = func(*arguments)
656
return result
657
658
# Unless otherwise indicated, the function declarations below are
659
# all from the gnutls/gnutls.h C header file.
660
661
# Functions
662
priority_set_direct = _library.gnutls_priority_set_direct
663
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
664
ctypes.POINTER(ctypes.c_char_p)]
665
priority_set_direct.restype = _error_code
666
667
init = _library.gnutls_init
668
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
669
init.restype = _error_code
670
671
set_default_priority = _library.gnutls_set_default_priority
672
set_default_priority.argtypes = [session_t]
673
set_default_priority.restype = _error_code
674
675
record_send = _library.gnutls_record_send
676
record_send.argtypes = [session_t, ctypes.c_void_p,
677
ctypes.c_size_t]
678
record_send.restype = ctypes.c_ssize_t
679
record_send.errcheck = _retry_on_error
680
681
certificate_allocate_credentials = (
682
_library.gnutls_certificate_allocate_credentials)
683
certificate_allocate_credentials.argtypes = [
684
ctypes.POINTER(certificate_credentials_t)]
685
certificate_allocate_credentials.restype = _error_code
686
687
certificate_free_credentials = (
688
_library.gnutls_certificate_free_credentials)
689
certificate_free_credentials.argtypes = [
690
certificate_credentials_t]
691
certificate_free_credentials.restype = None
692
693
handshake_set_private_extensions = (
694
_library.gnutls_handshake_set_private_extensions)
695
handshake_set_private_extensions.argtypes = [session_t,
696
ctypes.c_int]
697
handshake_set_private_extensions.restype = None
698
699
credentials_set = _library.gnutls_credentials_set
700
credentials_set.argtypes = [session_t, credentials_type_t,
701
ctypes.c_void_p]
702
credentials_set.restype = _error_code
703
704
strerror = _library.gnutls_strerror
705
strerror.argtypes = [ctypes.c_int]
706
strerror.restype = ctypes.c_char_p
707
708
certificate_type_get = _library.gnutls_certificate_type_get
709
certificate_type_get.argtypes = [session_t]
710
certificate_type_get.restype = _error_code
711
712
certificate_get_peers = _library.gnutls_certificate_get_peers
713
certificate_get_peers.argtypes = [session_t,
714
ctypes.POINTER(ctypes.c_uint)]
715
certificate_get_peers.restype = ctypes.POINTER(datum_t)
716
717
global_set_log_level = _library.gnutls_global_set_log_level
718
global_set_log_level.argtypes = [ctypes.c_int]
719
global_set_log_level.restype = None
720
721
global_set_log_function = _library.gnutls_global_set_log_function
722
global_set_log_function.argtypes = [log_func]
723
global_set_log_function.restype = None
724
725
deinit = _library.gnutls_deinit
726
deinit.argtypes = [session_t]
727
deinit.restype = None
728
729
handshake = _library.gnutls_handshake
730
handshake.argtypes = [session_t]
731
handshake.restype = _error_code
732
handshake.errcheck = _retry_on_error
733
734
transport_set_ptr = _library.gnutls_transport_set_ptr
735
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
736
transport_set_ptr.restype = None
737
738
bye = _library.gnutls_bye
739
bye.argtypes = [session_t, close_request_t]
740
bye.restype = _error_code
741
bye.errcheck = _retry_on_error
742
743
check_version = _library.gnutls_check_version
744
check_version.argtypes = [ctypes.c_char_p]
745
check_version.restype = ctypes.c_char_p
746
747
has_rawpk = bool(check_version(_tls_rawpk_version))
748
749
if has_rawpk:
750
# Types
751
class pubkey_st(ctypes.Structure):
752
_fields = []
753
pubkey_t = ctypes.POINTER(pubkey_st)
754
755
x509_crt_fmt_t = ctypes.c_int
756
757
# All the function declarations below are from gnutls/abstract.h
758
pubkey_init = _library.gnutls_pubkey_init
759
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
760
pubkey_init.restype = _error_code
761
762
pubkey_import = _library.gnutls_pubkey_import
763
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
764
x509_crt_fmt_t]
765
pubkey_import.restype = _error_code
766
767
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
768
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
769
ctypes.POINTER(ctypes.c_ubyte),
770
ctypes.POINTER(ctypes.c_size_t)]
771
pubkey_get_key_id.restype = _error_code
772
773
pubkey_deinit = _library.gnutls_pubkey_deinit
774
pubkey_deinit.argtypes = [pubkey_t]
775
pubkey_deinit.restype = None
776
else:
777
# All the function declarations below are from gnutls/openpgp.h
778
779
openpgp_crt_init = _library.gnutls_openpgp_crt_init
780
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
781
openpgp_crt_init.restype = _error_code
782
783
openpgp_crt_import = _library.gnutls_openpgp_crt_import
784
openpgp_crt_import.argtypes = [openpgp_crt_t,
785
ctypes.POINTER(datum_t),
786
openpgp_crt_fmt_t]
787
openpgp_crt_import.restype = _error_code
788
789
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
790
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
791
ctypes.POINTER(ctypes.c_uint)]
792
openpgp_crt_verify_self.restype = _error_code
793
794
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
795
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
796
openpgp_crt_deinit.restype = None
797
798
openpgp_crt_get_fingerprint = (
799
_library.gnutls_openpgp_crt_get_fingerprint)
800
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
801
ctypes.c_void_p,
802
ctypes.POINTER(
803
ctypes.c_size_t)]
804
openpgp_crt_get_fingerprint.restype = _error_code
805
806
if check_version("3.6.4"):
807
certificate_type_get2 = _library.gnutls_certificate_type_get2
808
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
809
certificate_type_get2.restype = _error_code
810
811
# Remove non-public functions
812
del _error_code, _retry_on_error
813
# Create the global "gnutls" object, simulating a module
814
gnutls = GnuTLS()
815
816
817
def call_pipe(connection, # : multiprocessing.Connection
818
func, *args, **kwargs):
819
"""This function is meant to be called by multiprocessing.Process
820
821
This function runs func(*args, **kwargs), and writes the resulting
822
return value on the provided multiprocessing.Connection.
823
"""
824
connection.send(func(*args, **kwargs))
825
connection.close()
826
827
387
828
class Client(object):
388
829
"""A representation of a client host served by this server.
389
830
390
831
Attributes:
391
832
approved: bool(); 'None' if not yet approved/disapproved
392
833
approval_delay: datetime.timedelta(); Time to wait for approval
394
835
checker: subprocess.Popen(); a running checker process used
395
836
to see if the client lives.
396
837
'None' if no process is running.
397
checker_callback_tag: a gobject event source tag, or None
838
checker_callback_tag: a GLib event source tag, or None
398
839
checker_command: string; External command which is run to check
399
840
if client lives. %() expansions are done at
400
841
runtime with vars(self) as dict, so that for
401
842
instance %(name)s can be used in the command.
402
checker_initiator_tag: a gobject event source tag, or None
843
checker_initiator_tag: a GLib event source tag, or None
403
844
created: datetime.datetime(); (UTC) object creation
404
845
client_structure: Object describing what attributes a client has
405
846
and is used for storing the client at exit
406
847
current_checker_command: string; current running checker_command
407
disable_initiator_tag: a gobject event source tag, or None
848
disable_initiator_tag: a GLib event source tag, or None
408
849
enabled: bool()
409
850
fingerprint: string (40 or 32 hexadecimal digits); used to
410
uniquely identify the client
851
uniquely identify an OpenPGP client
852
key_id: string (64 hexadecimal digits); used to uniquely identify
853
a client using raw public keys
411
854
host: string; available for use by the checker command
412
855
interval: datetime.timedelta(); How often to start a new checker
413
856
last_approval_request: datetime.datetime(); (UTC) or None
414
857
last_checked_ok: datetime.datetime(); (UTC) or None
415
858
last_checker_status: integer between 0 and 255 reflecting exit
416
859
status of last checker. -1 reflects crashed
417
checker, or None.
860
checker, -2 means no checker completed yet.
861
last_checker_signal: The signal which killed the last checker, if
862
last_checker_status is -1
418
863
last_enabled: datetime.datetime(); (UTC) or None
419
864
name: string; from the config file, used in log messages and
420
865
D-Bus identifiers
421
866
secret: bytestring; sent verbatim (over TLS) to client
422
867
timeout: datetime.timedelta(); How long from last_checked_ok
423
868
until this client is disabled
424
extended_timeout: extra long timeout when password has been sent
869
extended_timeout: extra long timeout when secret has been sent
425
870
runtime_expansions: Allowed attributes for runtime expansion.
426
871
expires: datetime.datetime(); time (UTC) when a client will be
427
872
disabled, or None
873
server_settings: The server_settings dict from main()
428
874
"""
429
875
430
876
runtime_expansions = ("approval_delay", "approval_duration",
431
"created", "enabled", "fingerprint",
432
"host", "interval", "last_checked_ok",
877
"created", "enabled", "expires", "key_id",
878
"fingerprint", "host", "interval",
879
"last_approval_request", "last_checked_ok",
433
880
"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)
881
client_defaults = {
882
"timeout": "PT5M",
883
"extended_timeout": "PT15M",
884
"interval": "PT2M",
885
"checker": "fping -q -- %%(host)s",
886
"host": "",
887
"approval_delay": "PT0S",
888
"approval_duration": "PT1S",
889
"approved_by_default": "True",
890
"enabled": "True",
891
}
459
892
460
893
@staticmethod
461
894
def config_parser(config):
462
""" Construct a new dict of client settings of this form:
895
"""Construct a new dict of client settings of this form:
463
896
{ client_name: {setting_name: value, ...}, ...}
464
with exceptions for any special settings as defined above"""
897
with exceptions for any special settings as defined above.
898
NOTE: Must be a pure function. Must return the same result
899
value given the same arguments.
900
"""
465
901
settings = {}
466
902
for client_name in config.sections():
467
903
section = dict(config.items(client_name))
468
904
client = settings[client_name] = {}
469
905
470
906
client["host"] = section["host"]
471
907
# Reformat values from string types to Python types
472
908
client["approved_by_default"] = config.getboolean(
473
909
client_name, "approved_by_default")
474
client["enabled"] = config.getboolean(client_name, "enabled")
475
910
client["enabled"] = config.getboolean(client_name,
911
"enabled")
912
913
# Uppercase and remove spaces from key_id and fingerprint
914
# for later comparison purposes with return value from the
915
# key_id() and fingerprint() functions
916
client["key_id"] = (section.get("key_id", "").upper()
917
.replace(" ", ""))
476
918
client["fingerprint"] = (section["fingerprint"].upper()
477
919
.replace(" ", ""))
478
920
if "secret" in section:
479
client["secret"] = section["secret"].decode("base64")
921
client["secret"] = codecs.decode(section["secret"]
922
.encode("utf-8"),
923
"base64")
480
924
elif "secfile" in section:
481
925
with open(os.path.expanduser(os.path.expandvars
482
926
(section["secfile"])),
483
927
"rb") as secfile:
484
928
client["secret"] = secfile.read()
485
929
else:
486
raise TypeError("No secret or secfile for section %s"
487
% section)
930
raise TypeError("No secret or secfile for section {}"
931
.format(section))
488
932
client["timeout"] = string_to_delta(section["timeout"])
489
933
client["extended_timeout"] = string_to_delta(
490
934
section["extended_timeout"])
496
940
client["checker_command"] = section["checker"]
497
941
client["last_approval_request"] = None
498
942
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
943
client["last_checker_status"] = -2
507
944
508
945
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."""
946
947
def __init__(self, settings, name=None, server_settings=None):
515
948
self.name = name
949
if server_settings is None:
950
server_settings = {}
951
self.server_settings = server_settings
516
952
# adding all client settings
517
for setting, value in settings.iteritems():
953
for setting, value in settings.items():
518
954
setattr(self, setting, value)
519
955
956
if self.enabled:
957
if not hasattr(self, "last_enabled"):
958
self.last_enabled = datetime.datetime.utcnow()
959
if not hasattr(self, "expires"):
960
self.expires = (datetime.datetime.utcnow()
961
+ self.timeout)
962
else:
963
self.last_enabled = None
964
self.expires = None
965
520
966
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
967
logger.debug(" Key ID: %s", self.key_id)
524
968
logger.debug(" Fingerprint: %s", self.fingerprint)
525
self.created = settings.get("created", datetime.datetime.utcnow())
969
self.created = settings.get("created",
970
datetime.datetime.utcnow())
526
971
527
972
# attributes specific for this server instance
528
973
self.checker = None
532
977
self.current_checker_command = None
533
978
self.approved = None
534
979
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()
980
self.changedstate = multiprocessing_manager.Condition(
981
multiprocessing_manager.Lock())
982
self.client_structure = [attr
983
for attr in self.__dict__.keys()
540
984
if not attr.startswith("_")]
541
985
self.client_structure.append("client_structure")
542
543
for name, t in inspect.getmembers(type(self),
544
lambda obj:
545
isinstance(obj,
546
property)):
986
987
for name, t in inspect.getmembers(
988
type(self), lambda obj: isinstance(obj, property)):
547
989
if not name.startswith("_"):
548
990
self.client_structure.append(name)
549
991
550
992
# Send notice to process children that client state has changed
551
993
def send_changedstate(self):
552
994
with self.changedstate:
553
995
self.changedstate.notify_all()
554
996
555
997
def enable(self):
556
998
"""Start this client's checker and timeout hooks"""
557
999
if getattr(self, "enabled", False):
558
1000
# Already enabled
559
1001
return
560
self.send_changedstate()
561
1002
self.expires = datetime.datetime.utcnow() + self.timeout
562
1003
self.enabled = True
563
1004
self.last_enabled = datetime.datetime.utcnow()
564
1005
self.init_checker()
565
1006
self.send_changedstate()
1007
566
1008
def disable(self, quiet=True):
567
1009
"""Disable this client."""
568
1010
if not getattr(self, "enabled", False):
569
1011
return False
570
1012
if not quiet:
571
self.send_changedstate()
572
if not quiet:
573
1013
logger.info("Disabling client %s", self.name)
574
if getattr(self, "disable_initiator_tag", False):
575
gobject.source_remove(self.disable_initiator_tag)
1014
if getattr(self, "disable_initiator_tag", None) is not None:
1015
GLib.source_remove(self.disable_initiator_tag)
576
1016
self.disable_initiator_tag = None
577
1017
self.expires = None
578
if getattr(self, "checker_initiator_tag", False):
579
gobject.source_remove(self.checker_initiator_tag)
1018
if getattr(self, "checker_initiator_tag", None) is not None:
1019
GLib.source_remove(self.checker_initiator_tag)
580
1020
self.checker_initiator_tag = None
581
1021
self.stop_checker()
582
1022
self.enabled = False
583
# Do not run this again if called by a gobject.timeout_add
1023
if not quiet:
1024
self.send_changedstate()
1025
# Do not run this again if called by a GLib.timeout_add
584
1026
return False
585
1027
586
1028
def __del__(self):
587
1029
self.disable()
588
1030
589
1031
def init_checker(self):
590
1032
# Schedule a new checker to be started an 'interval' from now,
591
1033
# and every interval from then on.
592
self.checker_initiator_tag = (gobject.timeout_add
593
(self.interval_milliseconds(),
594
self.start_checker))
1034
if self.checker_initiator_tag is not None:
1035
GLib.source_remove(self.checker_initiator_tag)
1036
self.checker_initiator_tag = GLib.timeout_add(
1037
int(self.interval.total_seconds() * 1000),
1038
self.start_checker)
595
1039
# Schedule a disable() when 'timeout' has passed
596
self.disable_initiator_tag = (gobject.timeout_add
597
(self.timeout_milliseconds(),
598
self.disable))
1040
if self.disable_initiator_tag is not None:
1041
GLib.source_remove(self.disable_initiator_tag)
1042
self.disable_initiator_tag = GLib.timeout_add(
1043
int(self.timeout.total_seconds() * 1000), self.disable)
599
1044
# Also start a new checker *right now*.
600
1045
self.start_checker()
601
602
def checker_callback(self, pid, condition, command):
1046
1047
def checker_callback(self, source, condition, connection,
1048
command):
603
1049
"""The checker has completed, so take appropriate actions."""
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
# Read return code from connection (see call_pipe)
1053
returncode = connection.recv()
1054
connection.close()
1055
1056
if returncode >= 0:
1057
self.last_checker_status = returncode
1058
self.last_checker_signal = None
608
1059
if self.last_checker_status == 0:
609
1060
logger.info("Checker for %(name)s succeeded",
610
1061
vars(self))
611
1062
self.checked_ok()
612
1063
else:
613
logger.info("Checker for %(name)s failed",
614
vars(self))
1064
logger.info("Checker for %(name)s failed", vars(self))
615
1065
else:
616
1066
self.last_checker_status = -1
1067
self.last_checker_signal = -returncode
617
1068
logger.warning("Checker for %(name)s crashed?",
618
1069
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
"""
1070
return False
1071
1072
def checked_ok(self):
1073
"""Assert that the client has been seen, alive and well."""
1074
self.last_checked_ok = datetime.datetime.utcnow()
1075
self.last_checker_status = 0
1076
self.last_checker_signal = None
1077
self.bump_timeout()
1078
1079
def bump_timeout(self, timeout=None):
1080
"""Bump up the timeout for this client."""
626
1081
if timeout is None:
627
1082
timeout = self.timeout
628
self.last_checked_ok = datetime.datetime.utcnow()
629
1083
if self.disable_initiator_tag is not None:
630
gobject.source_remove(self.disable_initiator_tag)
1084
GLib.source_remove(self.disable_initiator_tag)
1085
self.disable_initiator_tag = None
631
1086
if getattr(self, "enabled", False):
632
self.disable_initiator_tag = (gobject.timeout_add
633
(timedelta_to_milliseconds
634
(timeout), self.disable))
1087
self.disable_initiator_tag = GLib.timeout_add(
1088
int(timeout.total_seconds() * 1000), self.disable)
635
1089
self.expires = datetime.datetime.utcnow() + timeout
636
1090
637
1091
def need_approval(self):
638
1092
self.last_approval_request = datetime.datetime.utcnow()
639
1093
640
1094
def start_checker(self):
641
1095
"""Start a new checker subprocess if one is not running.
642
1096
643
1097
If a checker already exists, leave it running and do
644
1098
nothing."""
645
1099
# 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
1100
# did that, and if a checker (for some reason) started running
1101
# slowly and taking more than 'interval' time, then the client
1102
# would inevitably timeout, since no checker would get a
1103
# chance to run to completion. If we instead leave running
650
1104
# checkers alone, the checker would have to take more time
651
1105
# than 'timeout' for the client to be disabled, which is as it
652
1106
# 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)
1107
1108
if self.checker is not None and not self.checker.is_alive():
1109
logger.warning("Checker was not alive; joining")
1110
self.checker.join()
1111
self.checker = None
667
1112
# Start a new checker if needed
668
1113
if self.checker is None:
1114
# Escape attributes for the shell
1115
escaped_attrs = {
1116
attr: re.escape(str(getattr(self, attr)))
1117
for attr in self.runtime_expansions}
669
1118
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
1119
command = self.checker_command % escaped_attrs
1120
except TypeError as error:
1121
logger.error('Could not format string "%s"',
1122
self.checker_command,
1123
exc_info=error)
1124
return True # Try again later
688
1125
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
1126
logger.info("Starting checker %r for %s", command,
1127
self.name)
1128
# We don't need to redirect stdout and stderr, since
1129
# in normal mode, that is already done by daemon(),
1130
# and in debug mode we don't want to. (Stdin is
1131
# always replaced by /dev/null.)
1132
# The exception is when not debugging but nevertheless
1133
# running in the foreground; use the previously
1134
# created wnull.
1135
popen_args = {"close_fds": True,
1136
"shell": True,
1137
"cwd": "/"}
1138
if (not self.server_settings["debug"]
1139
and self.server_settings["foreground"]):
1140
popen_args.update({"stdout": wnull,
1141
"stderr": wnull})
1142
pipe = multiprocessing.Pipe(duplex=False)
1143
self.checker = multiprocessing.Process(
1144
target=call_pipe,
1145
args=(pipe[1], subprocess.call, command),
1146
kwargs=popen_args)
1147
self.checker.start()
1148
self.checker_callback_tag = GLib.io_add_watch(
1149
pipe[0].fileno(), GLib.IO_IN,
1150
self.checker_callback, pipe[0], command)
1151
# Re-run this periodically if run by GLib.timeout_add
713
1152
return True
714
1153
715
1154
def stop_checker(self):
716
1155
"""Force the checker process, if any, to stop."""
717
1156
if self.checker_callback_tag:
718
gobject.source_remove(self.checker_callback_tag)
1157
GLib.source_remove(self.checker_callback_tag)
719
1158
self.checker_callback_tag = None
720
1159
if getattr(self, "checker", None) is None:
721
1160
return
722
1161
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
1162
self.checker.terminate()
731
1163
self.checker = None
732
1164
733
1165
734
def dbus_service_property(dbus_interface, signature="v",
735
access="readwrite", byte_arrays=False):
1166
def dbus_service_property(dbus_interface,
1167
signature="v",
1168
access="readwrite",
1169
byte_arrays=False):
736
1170
"""Decorators for marking methods of a DBusObjectWithProperties to
737
1171
become properties on the D-Bus.
738
1172
739
1173
The decorated method will be called with no arguments by "Get"
740
1174
and with one argument by "Set".
741
1175
742
1176
The parameters, where they are supported, are the same as
743
1177
dbus.service.method, except there is only "signature", since the
744
1178
type from Get() and the type sent to Set() is the same.
747
1181
# "Set" method, so we fail early here:
748
1182
if byte_arrays and signature != "ay":
749
1183
raise ValueError("Byte arrays not supported for non-'ay'"
750
" signature %r" % signature)
1184
" signature {!r}".format(signature))
1185
751
1186
def decorator(func):
752
1187
func._dbus_is_property = True
753
1188
func._dbus_interface = dbus_interface
756
1191
func._dbus_name = func.__name__
757
1192
if func._dbus_name.endswith("_dbus_property"):
758
1193
func._dbus_name = func._dbus_name[:-14]
759
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
760
return func
1194
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1195
return func
1196
1197
return decorator
1198
1199
1200
def dbus_interface_annotations(dbus_interface):
1201
"""Decorator for marking functions returning interface annotations
1202
1203
Usage:
1204
1205
@dbus_interface_annotations("org.example.Interface")
1206
def _foo(self): # Function name does not matter
1207
return {"org.freedesktop.DBus.Deprecated": "true",
1208
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1209
"false"}
1210
"""
1211
1212
def decorator(func):
1213
func._dbus_is_interface = True
1214
func._dbus_interface = dbus_interface
1215
func._dbus_name = dbus_interface
1216
return func
1217
1218
return decorator
1219
1220
1221
def dbus_annotations(annotations):
1222
"""Decorator to annotate D-Bus methods, signals or properties
1223
Usage:
1224
1225
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1226
"org.freedesktop.DBus.Property."
1227
"EmitsChangedSignal": "false"})
1228
@dbus_service_property("org.example.Interface", signature="b",
1229
access="r")
1230
def Property_dbus_property(self):
1231
return dbus.Boolean(False)
1232
1233
See also the DBusObjectWithAnnotations class.
1234
"""
1235
1236
def decorator(func):
1237
func._dbus_annotations = annotations
1238
return func
1239
761
1240
return decorator
762
1241
763
1242
764
1243
class DBusPropertyException(dbus.exceptions.DBusException):
765
1244
"""A base class for D-Bus property-related exceptions
766
1245
"""
767
def __unicode__(self):
768
return unicode(str(self))
1246
pass
769
1247
770
1248
771
1249
class DBusPropertyAccessException(DBusPropertyException):
780
1258
pass
781
1259
782
1260
783
class DBusObjectWithProperties(dbus.service.Object):
1261
class DBusObjectWithAnnotations(dbus.service.Object):
1262
"""A D-Bus object with annotations.
1263
1264
Classes inheriting from this can use the dbus_annotations
1265
decorator to add annotations to methods or signals.
1266
"""
1267
1268
@staticmethod
1269
def _is_dbus_thing(thing):
1270
"""Returns a function testing if an attribute is a D-Bus thing
1271
1272
If called like _is_dbus_thing("method") it returns a function
1273
suitable for use as predicate to inspect.getmembers().
1274
"""
1275
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1276
False)
1277
1278
def _get_all_dbus_things(self, thing):
1279
"""Returns a generator of (name, attribute) pairs
1280
"""
1281
return ((getattr(athing.__get__(self), "_dbus_name", name),
1282
athing.__get__(self))
1283
for cls in self.__class__.__mro__
1284
for name, athing in
1285
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1286
1287
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1288
out_signature="s",
1289
path_keyword='object_path',
1290
connection_keyword='connection')
1291
def Introspect(self, object_path, connection):
1292
"""Overloading of standard D-Bus method.
1293
1294
Inserts annotation tags on methods and signals.
1295
"""
1296
xmlstring = dbus.service.Object.Introspect(self, object_path,
1297
connection)
1298
try:
1299
document = xml.dom.minidom.parseString(xmlstring)
1300
1301
for if_tag in document.getElementsByTagName("interface"):
1302
# Add annotation tags
1303
for typ in ("method", "signal"):
1304
for tag in if_tag.getElementsByTagName(typ):
1305
annots = dict()
1306
for name, prop in (self.
1307
_get_all_dbus_things(typ)):
1308
if (name == tag.getAttribute("name")
1309
and prop._dbus_interface
1310
== if_tag.getAttribute("name")):
1311
annots.update(getattr(
1312
prop, "_dbus_annotations", {}))
1313
for name, value in annots.items():
1314
ann_tag = document.createElement(
1315
"annotation")
1316
ann_tag.setAttribute("name", name)
1317
ann_tag.setAttribute("value", value)
1318
tag.appendChild(ann_tag)
1319
# Add interface annotation tags
1320
for annotation, value in dict(
1321
itertools.chain.from_iterable(
1322
annotations().items()
1323
for name, annotations
1324
in self._get_all_dbus_things("interface")
1325
if name == if_tag.getAttribute("name")
1326
)).items():
1327
ann_tag = document.createElement("annotation")
1328
ann_tag.setAttribute("name", annotation)
1329
ann_tag.setAttribute("value", value)
1330
if_tag.appendChild(ann_tag)
1331
# Fix argument name for the Introspect method itself
1332
if (if_tag.getAttribute("name")
1333
== dbus.INTROSPECTABLE_IFACE):
1334
for cn in if_tag.getElementsByTagName("method"):
1335
if cn.getAttribute("name") == "Introspect":
1336
for arg in cn.getElementsByTagName("arg"):
1337
if (arg.getAttribute("direction")
1338
== "out"):
1339
arg.setAttribute("name",
1340
"xml_data")
1341
xmlstring = document.toxml("utf-8")
1342
document.unlink()
1343
except (AttributeError, xml.dom.DOMException,
1344
xml.parsers.expat.ExpatError) as error:
1345
logger.error("Failed to override Introspection method",
1346
exc_info=error)
1347
return xmlstring
1348
1349
1350
class DBusObjectWithProperties(DBusObjectWithAnnotations):
784
1351
"""A D-Bus object with properties.
785
1352
786
1353
Classes inheriting from this can use the dbus_service_property
787
1354
decorator to expose methods as D-Bus properties. It exposes the
788
1355
standard Get(), Set(), and GetAll() methods on the D-Bus.
789
1356
"""
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
1357
803
1358
def _get_dbus_property(self, interface_name, property_name):
804
1359
"""Returns a bound method if one exists which is a D-Bus
805
1360
property with the specified name and interface.
806
1361
"""
807
for cls in self.__class__.__mro__:
808
for name, value in (inspect.getmembers
809
(cls, self._is_dbus_property)):
1362
for cls in self.__class__.__mro__:
1363
for name, value in inspect.getmembers(
1364
cls, self._is_dbus_thing("property")):
810
1365
if (value._dbus_name == property_name
811
1366
and value._dbus_interface == interface_name):
812
1367
return value.__get__(self)
813
1368
814
1369
# 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",
1370
raise DBusPropertyNotFound("{}:{}.{}".format(
1371
self.dbus_object_path, interface_name, property_name))
1372
1373
@classmethod
1374
def _get_all_interface_names(cls):
1375
"""Get a sequence of all interfaces supported by an object"""
1376
return (name for name in set(getattr(getattr(x, attr),
1377
"_dbus_interface", None)
1378
for x in (inspect.getmro(cls))
1379
for attr in dir(x))
1380
if name is not None)
1381
1382
@dbus.service.method(dbus.PROPERTIES_IFACE,
1383
in_signature="ss",
820
1384
out_signature="v")
821
1385
def Get(self, interface_name, property_name):
822
1386
"""Standard D-Bus property Get() method, see D-Bus standard.
828
1392
if not hasattr(value, "variant_level"):
829
1393
return value
830
1394
return type(value)(value, variant_level=value.variant_level+1)
831
1395
832
1396
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
833
1397
def Set(self, interface_name, property_name, value):
834
1398
"""Standard D-Bus property Set() method, see D-Bus standard.
840
1404
# The byte_arrays option is not supported yet on
841
1405
# signatures other than "ay".
842
1406
if prop._dbus_signature != "ay":
843
raise ValueError
844
value = dbus.ByteArray(''.join(unichr(byte)
845
for byte in value))
1407
raise ValueError("Byte arrays not supported for non-"
1408
"'ay' signature {!r}"
1409
.format(prop._dbus_signature))
1410
value = dbus.ByteArray(b''.join(chr(byte)
1411
for byte in value))
846
1412
prop(value)
847
848
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1413
1414
@dbus.service.method(dbus.PROPERTIES_IFACE,
1415
in_signature="s",
849
1416
out_signature="a{sv}")
850
1417
def GetAll(self, interface_name):
851
1418
"""Standard D-Bus property GetAll() method, see D-Bus
852
1419
standard.
853
1420
854
1421
Note: Will not include properties with access="write".
855
1422
"""
856
1423
properties = {}
857
for name, prop in self._get_all_dbus_properties():
1424
for name, prop in self._get_all_dbus_things("property"):
858
1425
if (interface_name
859
1426
and interface_name != prop._dbus_interface):
860
1427
# Interface non-empty but did not match
866
1433
if not hasattr(value, "variant_level"):
867
1434
properties[name] = value
868
1435
continue
869
properties[name] = type(value)(value, variant_level=
870
value.variant_level+1)
1436
properties[name] = type(value)(
1437
value, variant_level=value.variant_level + 1)
871
1438
return dbus.Dictionary(properties, signature="sv")
872
1439
1440
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1441
def PropertiesChanged(self, interface_name, changed_properties,
1442
invalidated_properties):
1443
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1444
standard.
1445
"""
1446
pass
1447
873
1448
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
874
1449
out_signature="s",
875
1450
path_keyword='object_path',
876
1451
connection_keyword='connection')
877
1452
def Introspect(self, object_path, connection):
878
"""Standard D-Bus method, overloaded to insert property tags.
1453
"""Overloading of standard D-Bus method.
1454
1455
Inserts property tags and interface annotation tags.
879
1456
"""
880
xmlstring = dbus.service.Object.Introspect(self, object_path,
881
connection)
1457
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1458
object_path,
1459
connection)
882
1460
try:
883
1461
document = xml.dom.minidom.parseString(xmlstring)
1462
884
1463
def make_tag(document, name, prop):
885
1464
e = document.createElement("property")
886
1465
e.setAttribute("name", name)
887
1466
e.setAttribute("type", prop._dbus_signature)
888
1467
e.setAttribute("access", prop._dbus_access)
889
1468
return e
1469
890
1470
for if_tag in document.getElementsByTagName("interface"):
1471
# Add property tags
891
1472
for tag in (make_tag(document, name, prop)
892
1473
for name, prop
893
in self._get_all_dbus_properties()
1474
in self._get_all_dbus_things("property")
894
1475
if prop._dbus_interface
895
1476
== if_tag.getAttribute("name")):
896
1477
if_tag.appendChild(tag)
1478
# Add annotation tags for properties
1479
for tag in if_tag.getElementsByTagName("property"):
1480
annots = dict()
1481
for name, prop in self._get_all_dbus_things(
1482
"property"):
1483
if (name == tag.getAttribute("name")
1484
and prop._dbus_interface
1485
== if_tag.getAttribute("name")):
1486
annots.update(getattr(
1487
prop, "_dbus_annotations", {}))
1488
for name, value in annots.items():
1489
ann_tag = document.createElement(
1490
"annotation")
1491
ann_tag.setAttribute("name", name)
1492
ann_tag.setAttribute("value", value)
1493
tag.appendChild(ann_tag)
897
1494
# Add the names to the return values for the
898
1495
# "org.freedesktop.DBus.Properties" methods
899
1496
if (if_tag.getAttribute("name")
914
1511
except (AttributeError, xml.dom.DOMException,
915
1512
xml.parsers.expat.ExpatError) as error:
916
1513
logger.error("Failed to override Introspection method",
917
error)
918
return xmlstring
919
920
921
def datetime_to_dbus (dt, variant_level=0):
1514
exc_info=error)
1515
return xmlstring
1516
1517
1518
try:
1519
dbus.OBJECT_MANAGER_IFACE
1520
except AttributeError:
1521
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1522
1523
1524
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1525
"""A D-Bus object with an ObjectManager.
1526
1527
Classes inheriting from this exposes the standard
1528
GetManagedObjects call and the InterfacesAdded and
1529
InterfacesRemoved signals on the standard
1530
"org.freedesktop.DBus.ObjectManager" interface.
1531
1532
Note: No signals are sent automatically; they must be sent
1533
manually.
1534
"""
1535
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1536
out_signature="a{oa{sa{sv}}}")
1537
def GetManagedObjects(self):
1538
"""This function must be overridden"""
1539
raise NotImplementedError()
1540
1541
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1542
signature="oa{sa{sv}}")
1543
def InterfacesAdded(self, object_path, interfaces_and_properties):
1544
pass
1545
1546
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1547
def InterfacesRemoved(self, object_path, interfaces):
1548
pass
1549
1550
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1551
out_signature="s",
1552
path_keyword='object_path',
1553
connection_keyword='connection')
1554
def Introspect(self, object_path, connection):
1555
"""Overloading of standard D-Bus method.
1556
1557
Override return argument name of GetManagedObjects to be
1558
"objpath_interfaces_and_properties"
1559
"""
1560
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1561
object_path,
1562
connection)
1563
try:
1564
document = xml.dom.minidom.parseString(xmlstring)
1565
1566
for if_tag in document.getElementsByTagName("interface"):
1567
# Fix argument name for the GetManagedObjects method
1568
if (if_tag.getAttribute("name")
1569
== dbus.OBJECT_MANAGER_IFACE):
1570
for cn in if_tag.getElementsByTagName("method"):
1571
if (cn.getAttribute("name")
1572
== "GetManagedObjects"):
1573
for arg in cn.getElementsByTagName("arg"):
1574
if (arg.getAttribute("direction")
1575
== "out"):
1576
arg.setAttribute(
1577
"name",
1578
"objpath_interfaces"
1579
"_and_properties")
1580
xmlstring = document.toxml("utf-8")
1581
document.unlink()
1582
except (AttributeError, xml.dom.DOMException,
1583
xml.parsers.expat.ExpatError) as error:
1584
logger.error("Failed to override Introspection method",
1585
exc_info=error)
1586
return xmlstring
1587
1588
1589
def datetime_to_dbus(dt, variant_level=0):
922
1590
"""Convert a UTC datetime.datetime() to a D-Bus type."""
923
1591
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.
1592
return dbus.String("", variant_level=variant_level)
1593
return dbus.String(dt.isoformat(), variant_level=variant_level)
1594
1595
1596
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1597
"""A class decorator; applied to a subclass of
1598
dbus.service.Object, it will add alternate D-Bus attributes with
1599
interface names according to the "alt_interface_names" mapping.
1600
Usage:
1601
1602
@alternate_dbus_interfaces({"org.example.Interface":
1603
"net.example.AlternateInterface"})
1604
class SampleDBusObject(dbus.service.Object):
1605
@dbus.service.method("org.example.Interface")
1606
def SampleDBusMethod():
1607
pass
1608
1609
The above "SampleDBusMethod" on "SampleDBusObject" will be
1610
reachable via two interfaces: "org.example.Interface" and
1611
"net.example.AlternateInterface", the latter of which will have
1612
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1613
"true", unless "deprecate" is passed with a False value.
1614
1615
This works for methods and signals, and also for D-Bus properties
1616
(from DBusObjectWithProperties) and interfaces (from the
1617
dbus_interface_annotations decorator).
933
1618
"""
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):
1619
1620
def wrapper(cls):
1621
for orig_interface_name, alt_interface_name in (
1622
alt_interface_names.items()):
1623
attr = {}
1624
interface_names = set()
1625
# Go though all attributes of the class
1626
for attrname, attribute in inspect.getmembers(cls):
941
1627
# Ignore non-D-Bus attributes, and D-Bus attributes
942
1628
# with the wrong interface name
943
1629
if (not hasattr(attribute, "_dbus_interface")
944
or not attribute._dbus_interface
945
.startswith("se.recompile.Mandos")):
1630
or not attribute._dbus_interface.startswith(
1631
orig_interface_name)):
946
1632
continue
947
1633
# Create an alternate D-Bus interface name based on
948
1634
# the current name
949
alt_interface = (attribute._dbus_interface
950
.replace("se.recompile.Mandos",
951
"se.bsnet.fukt.Mandos"))
1635
alt_interface = attribute._dbus_interface.replace(
1636
orig_interface_name, alt_interface_name)
1637
interface_names.add(alt_interface)
952
1638
# Is this a D-Bus signal?
953
1639
if getattr(attribute, "_dbus_is_signal", False):
954
# Extract the original non-method function by
955
# black magic
956
nonmethod_func = (dict(
1640
# Extract the original non-method undecorated
1641
# function by black magic
1642
if sys.version_info.major == 2:
1643
nonmethod_func = (dict(
957
1644
zip(attribute.func_code.co_freevars,
958
attribute.__closure__))["func"]
959
.cell_contents)
1645
attribute.__closure__))
1646
["func"].cell_contents)
1647
else:
1648
nonmethod_func = (dict(
1649
zip(attribute.__code__.co_freevars,
1650
attribute.__closure__))
1651
["func"].cell_contents)
960
1652
# Create a new, but exactly alike, function
961
1653
# object, and decorate it to be a new D-Bus signal
962
1654
# 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)))
1655
new_function = copy_function(nonmethod_func)
1656
new_function = (dbus.service.signal(
1657
alt_interface,
1658
attribute._dbus_signature)(new_function))
1659
# Copy annotations, if any
1660
try:
1661
new_function._dbus_annotations = dict(
1662
attribute._dbus_annotations)
1663
except AttributeError:
1664
pass
1665
972
1666
# 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
1667
# original and alternate functions, so both the
1668
# original and alternate signals gets sent when
1669
# the function is called
975
1670
def fixscope(func1, func2):
976
1671
"""This function is a scope container to pass
977
1672
func1 and func2 to the "call_both" function
978
1673
outside of its arguments"""
1674
1675
@functools.wraps(func2)
979
1676
def call_both(*args, **kwargs):
980
1677
"""This function will emit two D-Bus
981
1678
signals by calling func1 and func2"""
982
1679
func1(*args, **kwargs)
983
1680
func2(*args, **kwargs)
1681
# Make wrapper function look like a D-Bus
1682
# signal
1683
for name, attr in inspect.getmembers(func2):
1684
if name.startswith("_dbus_"):
1685
setattr(call_both, name, attr)
1686
984
1687
return call_both
985
1688
# Create the "call_both" function and add it to
986
1689
# the class
987
attr[attrname] = fixscope(attribute,
988
new_function)
1690
attr[attrname] = fixscope(attribute, new_function)
989
1691
# Is this a D-Bus method?
990
1692
elif getattr(attribute, "_dbus_is_method", False):
991
1693
# Create a new, but exactly alike, function
992
1694
# object. Decorate it to be a new D-Bus method
993
1695
# with the alternate D-Bus interface name. Add it
994
1696
# 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)))
1697
attr[attrname] = (
1698
dbus.service.method(
1699
alt_interface,
1700
attribute._dbus_in_signature,
1701
attribute._dbus_out_signature)
1702
(copy_function(attribute)))
1703
# Copy annotations, if any
1704
try:
1705
attr[attrname]._dbus_annotations = dict(
1706
attribute._dbus_annotations)
1707
except AttributeError:
1708
pass
1005
1709
# Is this a D-Bus property?
1006
1710
elif getattr(attribute, "_dbus_is_property", False):
1007
1711
# Create a new, but exactly alike, function
1008
1712
# object, and decorate it to be a new D-Bus
1009
1713
# property with the alternate D-Bus interface
1010
1714
# 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
1715
attr[attrname] = (dbus_service_property(
1716
alt_interface, attribute._dbus_signature,
1717
attribute._dbus_access,
1718
attribute._dbus_get_args_options
1719
["byte_arrays"])
1720
(copy_function(attribute)))
1721
# Copy annotations, if any
1722
try:
1723
attr[attrname]._dbus_annotations = dict(
1724
attribute._dbus_annotations)
1725
except AttributeError:
1726
pass
1727
# Is this a D-Bus interface?
1728
elif getattr(attribute, "_dbus_is_interface", False):
1729
# Create a new, but exactly alike, function
1730
# object. Decorate it to be a new D-Bus interface
1731
# with the alternate D-Bus interface name. Add it
1732
# to the class.
1733
attr[attrname] = (
1734
dbus_interface_annotations(alt_interface)
1735
(copy_function(attribute)))
1736
if deprecate:
1737
# Deprecate all alternate interfaces
1738
iname = "_AlternateDBusNames_interface_annotation{}"
1739
for interface_name in interface_names:
1740
1741
@dbus_interface_annotations(interface_name)
1742
def func(self):
1743
return {"org.freedesktop.DBus.Deprecated":
1744
"true"}
1745
# Find an unused name
1746
for aname in (iname.format(i)
1747
for i in itertools.count()):
1748
if aname not in attr:
1749
attr[aname] = func
1750
break
1751
if interface_names:
1752
# Replace the class with a new subclass of it with
1753
# methods, signals, etc. as created above.
1754
if sys.version_info.major == 2:
1755
cls = type(b"{}Alternate".format(cls.__name__),
1756
(cls, ), attr)
1757
else:
1758
cls = type("{}Alternate".format(cls.__name__),
1759
(cls, ), attr)
1760
return cls
1761
1762
return wrapper
1763
1764
1765
@alternate_dbus_interfaces({"se.recompile.Mandos":
1766
"se.bsnet.fukt.Mandos"})
1027
1767
class ClientDBus(Client, DBusObjectWithProperties):
1028
1768
"""A Client class using D-Bus
1029
1769
1030
1770
Attributes:
1031
1771
dbus_object_path: dbus.ObjectPath
1032
1772
bus: dbus.SystemBus()
1033
1773
"""
1034
1774
1035
1775
runtime_expansions = (Client.runtime_expansions
1036
+ ("dbus_object_path",))
1037
1776
+ ("dbus_object_path", ))
1777
1778
_interface = "se.recompile.Mandos.Client"
1779
1038
1780
# dbus.service.Object doesn't use super(), so we can't either.
1039
1040
def __init__(self, bus = None, *args, **kwargs):
1781
1782
def __init__(self, bus=None, *args, **kwargs):
1041
1783
self.bus = bus
1042
1784
Client.__init__(self, *args, **kwargs)
1043
self._approvals_pending = 0
1044
1045
self._approvals_pending = 0
1046
1785
# Only now, when this client is initialized, can it show up on
1047
1786
# the D-Bus
1048
client_object_name = unicode(self.name).translate(
1787
client_object_name = str(self.name).translate(
1049
1788
{ord("."): ord("_"),
1050
1789
ord("-"): ord("_")})
1051
self.dbus_object_path = (dbus.ObjectPath
1052
("/clients/" + client_object_name))
1790
self.dbus_object_path = dbus.ObjectPath(
1791
"/clients/" + client_object_name)
1053
1792
DBusObjectWithProperties.__init__(self, self.bus,
1054
1793
self.dbus_object_path)
1055
1056
def notifychangeproperty(transform_func,
1057
dbus_name, type_func=lambda x: x,
1058
variant_level=1):
1794
1795
def notifychangeproperty(transform_func, dbus_name,
1796
type_func=lambda x: x,
1797
variant_level=1,
1798
invalidate_only=False,
1799
_interface=_interface):
1059
1800
""" Modify a variable so that it's a property which announces
1060
1801
its changes to DBus.
1061
1802
1062
1803
transform_fun: Function that takes a value and a variant_level
1063
1804
and transforms it to a D-Bus type.
1064
1805
dbus_name: D-Bus name of the variable
1066
1807
to the D-Bus. Default: no transform
1067
1808
variant_level: D-Bus variant level. Default: 1
1068
1809
"""
1069
attrname = "_{0}".format(dbus_name)
1810
attrname = "_{}".format(dbus_name)
1811
1070
1812
def setter(self, value):
1071
1813
if hasattr(self, "dbus_object_path"):
1072
1814
if (not hasattr(self, attrname) or
1073
1815
type_func(getattr(self, attrname, None))
1074
1816
!= 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)
1817
if invalidate_only:
1818
self.PropertiesChanged(
1819
_interface, dbus.Dictionary(),
1820
dbus.Array((dbus_name, )))
1821
else:
1822
dbus_value = transform_func(
1823
type_func(value),
1824
variant_level=variant_level)
1825
self.PropertyChanged(dbus.String(dbus_name),
1826
dbus_value)
1827
self.PropertiesChanged(
1828
_interface,
1829
dbus.Dictionary({dbus.String(dbus_name):
1830
dbus_value}),
1831
dbus.Array())
1080
1832
setattr(self, attrname, value)
1081
1833
1082
1834
return property(lambda self: getattr(self, attrname), setter)
1083
1084
1835
1085
1836
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1086
1837
approvals_pending = notifychangeproperty(dbus.Boolean,
1087
1838
"ApprovalPending",
1088
type_func = bool)
1839
type_func=bool)
1089
1840
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1090
1841
last_enabled = notifychangeproperty(datetime_to_dbus,
1091
1842
"LastEnabled")
1092
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1093
type_func = lambda checker:
1094
checker is not None)
1843
checker = notifychangeproperty(
1844
dbus.Boolean, "CheckerRunning",
1845
type_func=lambda checker: checker is not None)
1095
1846
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1096
1847
"LastCheckedOK")
1848
last_checker_status = notifychangeproperty(dbus.Int16,
1849
"LastCheckerStatus")
1097
1850
last_approval_request = notifychangeproperty(
1098
1851
datetime_to_dbus, "LastApprovalRequest")
1099
1852
approved_by_default = notifychangeproperty(dbus.Boolean,
1100
1853
"ApprovedByDefault")
1101
approval_delay = notifychangeproperty(dbus.UInt64,
1102
"ApprovalDelay",
1103
type_func =
1104
timedelta_to_milliseconds)
1854
approval_delay = notifychangeproperty(
1855
dbus.UInt64, "ApprovalDelay",
1856
type_func=lambda td: td.total_seconds() * 1000)
1105
1857
approval_duration = notifychangeproperty(
1106
1858
dbus.UInt64, "ApprovalDuration",
1107
type_func = timedelta_to_milliseconds)
1859
type_func=lambda td: td.total_seconds() * 1000)
1108
1860
host = notifychangeproperty(dbus.String, "Host")
1109
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1110
type_func =
1111
timedelta_to_milliseconds)
1861
timeout = notifychangeproperty(
1862
dbus.UInt64, "Timeout",
1863
type_func=lambda td: td.total_seconds() * 1000)
1112
1864
extended_timeout = notifychangeproperty(
1113
1865
dbus.UInt64, "ExtendedTimeout",
1114
type_func = timedelta_to_milliseconds)
1115
interval = notifychangeproperty(dbus.UInt64,
1116
"Interval",
1117
type_func =
1118
timedelta_to_milliseconds)
1866
type_func=lambda td: td.total_seconds() * 1000)
1867
interval = notifychangeproperty(
1868
dbus.UInt64, "Interval",
1869
type_func=lambda td: td.total_seconds() * 1000)
1119
1870
checker_command = notifychangeproperty(dbus.String, "Checker")
1120
1871
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1872
invalidate_only=True)
1873
1121
1874
del notifychangeproperty
1122
1875
1123
1876
def __del__(self, *args, **kwargs):
1124
1877
try:
1125
1878
self.remove_from_connection()
1128
1881
if hasattr(DBusObjectWithProperties, "__del__"):
1129
1882
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1130
1883
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)
1884
1885
def checker_callback(self, source, condition,
1886
connection, command, *args, **kwargs):
1887
ret = Client.checker_callback(self, source, condition,
1888
connection, command, *args,
1889
**kwargs)
1890
exitstatus = self.last_checker_status
1891
if exitstatus >= 0:
1138
1892
# Emit D-Bus signal
1139
1893
self.CheckerCompleted(dbus.Int16(exitstatus),
1140
dbus.Int64(condition),
1894
# This is specific to GNU libC
1895
dbus.Int64(exitstatus << 8),
1141
1896
dbus.String(command))
1142
1897
else:
1143
1898
# Emit D-Bus signal
1144
1899
self.CheckerCompleted(dbus.Int16(-1),
1145
dbus.Int64(condition),
1900
dbus.Int64(
1901
# This is specific to GNU libC
1902
(exitstatus << 8)
1903
| self.last_checker_signal),
1146
1904
dbus.String(command))
1147
1148
return Client.checker_callback(self, pid, condition, command,
1149
*args, **kwargs)
1150
1905
return ret
1906
1151
1907
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
1908
old_checker_pid = getattr(self.checker, "pid", None)
1157
1909
r = Client.start_checker(self, *args, **kwargs)
1158
1910
# Only if new checker process was started
1159
1911
if (self.checker is not None
1161
1913
# Emit D-Bus signal
1162
1914
self.CheckerStarted(self.current_checker_command)
1163
1915
return r
1164
1916
1165
1917
def _reset_approved(self):
1166
1918
self.approved = None
1167
1919
return False
1168
1920
1169
1921
def approve(self, value=True):
1170
self.send_changedstate()
1171
1922
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
1923
GLib.timeout_add(int(self.approval_duration.total_seconds()
1924
* 1000), self._reset_approved)
1925
self.send_changedstate()
1926
1927
# D-Bus methods, signals & properties
1928
1929
# Interfaces
1930
1931
# Signals
1932
1182
1933
# CheckerCompleted - signal
1183
1934
@dbus.service.signal(_interface, signature="nxs")
1184
1935
def CheckerCompleted(self, exitcode, waitstatus, command):
1185
1936
"D-Bus signal"
1186
1937
pass
1187
1938
1188
1939
# CheckerStarted - signal
1189
1940
@dbus.service.signal(_interface, signature="s")
1190
1941
def CheckerStarted(self, command):
1191
1942
"D-Bus signal"
1192
1943
pass
1193
1944
1194
1945
# PropertyChanged - signal
1946
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1195
1947
@dbus.service.signal(_interface, signature="sv")
1196
1948
def PropertyChanged(self, property, value):
1197
1949
"D-Bus signal"
1198
1950
pass
1199
1951
1200
1952
# GotSecret - signal
1201
1953
@dbus.service.signal(_interface)
1202
1954
def GotSecret(self):
1205
1957
server to mandos-client
1206
1958
"""
1207
1959
pass
1208
1960
1209
1961
# Rejected - signal
1210
1962
@dbus.service.signal(_interface, signature="s")
1211
1963
def Rejected(self, reason):
1212
1964
"D-Bus signal"
1213
1965
pass
1214
1966
1215
1967
# NeedApproval - signal
1216
1968
@dbus.service.signal(_interface, signature="tb")
1217
1969
def NeedApproval(self, timeout, default):
1218
1970
"D-Bus signal"
1219
1971
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
1972
1973
# Methods
1974
1231
1975
# Approve - method
1232
1976
@dbus.service.method(_interface, in_signature="b")
1233
1977
def Approve(self, value):
1234
1978
self.approve(value)
1235
1979
1236
1980
# CheckedOK - method
1237
1981
@dbus.service.method(_interface)
1238
1982
def CheckedOK(self):
1239
1983
self.checked_ok()
1240
1984
1241
1985
# Enable - method
1986
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1242
1987
@dbus.service.method(_interface)
1243
1988
def Enable(self):
1244
1989
"D-Bus method"
1245
1990
self.enable()
1246
1991
1247
1992
# StartChecker - method
1993
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1248
1994
@dbus.service.method(_interface)
1249
1995
def StartChecker(self):
1250
1996
"D-Bus method"
1251
1997
self.start_checker()
1252
1998
1253
1999
# Disable - method
2000
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1254
2001
@dbus.service.method(_interface)
1255
2002
def Disable(self):
1256
2003
"D-Bus method"
1257
2004
self.disable()
1258
2005
1259
2006
# StopChecker - method
2007
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1260
2008
@dbus.service.method(_interface)
1261
2009
def StopChecker(self):
1262
2010
self.stop_checker()
1263
1264
## Properties
1265
2011
2012
# Properties
2013
1266
2014
# ApprovalPending - property
1267
2015
@dbus_service_property(_interface, signature="b", access="read")
1268
2016
def ApprovalPending_dbus_property(self):
1269
2017
return dbus.Boolean(bool(self.approvals_pending))
1270
2018
1271
2019
# ApprovedByDefault - property
1272
@dbus_service_property(_interface, signature="b",
2020
@dbus_service_property(_interface,
2021
signature="b",
1273
2022
access="readwrite")
1274
2023
def ApprovedByDefault_dbus_property(self, value=None):
1275
2024
if value is None: # get
1276
2025
return dbus.Boolean(self.approved_by_default)
1277
2026
self.approved_by_default = bool(value)
1278
2027
1279
2028
# ApprovalDelay - property
1280
@dbus_service_property(_interface, signature="t",
2029
@dbus_service_property(_interface,
2030
signature="t",
1281
2031
access="readwrite")
1282
2032
def ApprovalDelay_dbus_property(self, value=None):
1283
2033
if value is None: # get
1284
return dbus.UInt64(self.approval_delay_milliseconds())
2034
return dbus.UInt64(self.approval_delay.total_seconds()
2035
* 1000)
1285
2036
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1286
2037
1287
2038
# ApprovalDuration - property
1288
@dbus_service_property(_interface, signature="t",
2039
@dbus_service_property(_interface,
2040
signature="t",
1289
2041
access="readwrite")
1290
2042
def ApprovalDuration_dbus_property(self, value=None):
1291
2043
if value is None: # get
1292
return dbus.UInt64(timedelta_to_milliseconds(
1293
self.approval_duration))
2044
return dbus.UInt64(self.approval_duration.total_seconds()
2045
* 1000)
1294
2046
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1295
2047
1296
2048
# Name - property
2049
@dbus_annotations(
2050
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1297
2051
@dbus_service_property(_interface, signature="s", access="read")
1298
2052
def Name_dbus_property(self):
1299
2053
return dbus.String(self.name)
1300
2054
2055
# KeyID - property
2056
@dbus_annotations(
2057
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2058
@dbus_service_property(_interface, signature="s", access="read")
2059
def KeyID_dbus_property(self):
2060
return dbus.String(self.key_id)
2061
1301
2062
# Fingerprint - property
2063
@dbus_annotations(
2064
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1302
2065
@dbus_service_property(_interface, signature="s", access="read")
1303
2066
def Fingerprint_dbus_property(self):
1304
2067
return dbus.String(self.fingerprint)
1305
2068
1306
2069
# Host - property
1307
@dbus_service_property(_interface, signature="s",
2070
@dbus_service_property(_interface,
2071
signature="s",
1308
2072
access="readwrite")
1309
2073
def Host_dbus_property(self, value=None):
1310
2074
if value is None: # get
1311
2075
return dbus.String(self.host)
1312
self.host = unicode(value)
1313
2076
self.host = str(value)
2077
1314
2078
# Created - property
2079
@dbus_annotations(
2080
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1315
2081
@dbus_service_property(_interface, signature="s", access="read")
1316
2082
def Created_dbus_property(self):
1317
2083
return datetime_to_dbus(self.created)
1318
2084
1319
2085
# LastEnabled - property
1320
2086
@dbus_service_property(_interface, signature="s", access="read")
1321
2087
def LastEnabled_dbus_property(self):
1322
2088
return datetime_to_dbus(self.last_enabled)
1323
2089
1324
2090
# Enabled - property
1325
@dbus_service_property(_interface, signature="b",
2091
@dbus_service_property(_interface,
2092
signature="b",
1326
2093
access="readwrite")
1327
2094
def Enabled_dbus_property(self, value=None):
1328
2095
if value is None: # get
1331
2098
self.enable()
1332
2099
else:
1333
2100
self.disable()
1334
2101
1335
2102
# LastCheckedOK - property
1336
@dbus_service_property(_interface, signature="s",
2103
@dbus_service_property(_interface,
2104
signature="s",
1337
2105
access="readwrite")
1338
2106
def LastCheckedOK_dbus_property(self, value=None):
1339
2107
if value is not None:
1340
2108
self.checked_ok()
1341
2109
return
1342
2110
return datetime_to_dbus(self.last_checked_ok)
1343
2111
2112
# LastCheckerStatus - property
2113
@dbus_service_property(_interface, signature="n", access="read")
2114
def LastCheckerStatus_dbus_property(self):
2115
return dbus.Int16(self.last_checker_status)
2116
1344
2117
# Expires - property
1345
2118
@dbus_service_property(_interface, signature="s", access="read")
1346
2119
def Expires_dbus_property(self):
1347
2120
return datetime_to_dbus(self.expires)
1348
2121
1349
2122
# LastApprovalRequest - property
1350
2123
@dbus_service_property(_interface, signature="s", access="read")
1351
2124
def LastApprovalRequest_dbus_property(self):
1352
2125
return datetime_to_dbus(self.last_approval_request)
1353
2126
1354
2127
# Timeout - property
1355
@dbus_service_property(_interface, signature="t",
2128
@dbus_service_property(_interface,
2129
signature="t",
1356
2130
access="readwrite")
1357
2131
def Timeout_dbus_property(self, value=None):
1358
2132
if value is None: # get
1359
return dbus.UInt64(self.timeout_milliseconds())
2133
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2134
old_timeout = self.timeout
1360
2135
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
2136
# Reschedule disabling
2137
if self.enabled:
2138
now = datetime.datetime.utcnow()
2139
self.expires += self.timeout - old_timeout
2140
if self.expires <= now:
2141
# The timeout has passed
2142
self.disable()
2143
else:
2144
if (getattr(self, "disable_initiator_tag", None)
2145
is None):
2146
return
2147
GLib.source_remove(self.disable_initiator_tag)
2148
self.disable_initiator_tag = GLib.timeout_add(
2149
int((self.expires - now).total_seconds() * 1000),
2150
self.disable)
2151
1382
2152
# ExtendedTimeout - property
1383
@dbus_service_property(_interface, signature="t",
2153
@dbus_service_property(_interface,
2154
signature="t",
1384
2155
access="readwrite")
1385
2156
def ExtendedTimeout_dbus_property(self, value=None):
1386
2157
if value is None: # get
1387
return dbus.UInt64(self.extended_timeout_milliseconds())
2158
return dbus.UInt64(self.extended_timeout.total_seconds()
2159
* 1000)
1388
2160
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1389
2161
1390
2162
# Interval - property
1391
@dbus_service_property(_interface, signature="t",
2163
@dbus_service_property(_interface,
2164
signature="t",
1392
2165
access="readwrite")
1393
2166
def Interval_dbus_property(self, value=None):
1394
2167
if value is None: # get
1395
return dbus.UInt64(self.interval_milliseconds())
2168
return dbus.UInt64(self.interval.total_seconds() * 1000)
1396
2169
self.interval = datetime.timedelta(0, 0, 0, value)
1397
2170
if getattr(self, "checker_initiator_tag", None) is None:
1398
2171
return
1399
2172
if self.enabled:
1400
2173
# 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
2174
GLib.source_remove(self.checker_initiator_tag)
2175
self.checker_initiator_tag = GLib.timeout_add(
2176
value, self.start_checker)
2177
self.start_checker() # Start one now, too
2178
1406
2179
# Checker - property
1407
@dbus_service_property(_interface, signature="s",
2180
@dbus_service_property(_interface,
2181
signature="s",
1408
2182
access="readwrite")
1409
2183
def Checker_dbus_property(self, value=None):
1410
2184
if value is None: # get
1411
2185
return dbus.String(self.checker_command)
1412
self.checker_command = unicode(value)
1413
2186
self.checker_command = str(value)
2187
1414
2188
# CheckerRunning - property
1415
@dbus_service_property(_interface, signature="b",
2189
@dbus_service_property(_interface,
2190
signature="b",
1416
2191
access="readwrite")
1417
2192
def CheckerRunning_dbus_property(self, value=None):
1418
2193
if value is None: # get
1421
2196
self.start_checker()
1422
2197
else:
1423
2198
self.stop_checker()
1424
2199
1425
2200
# ObjectPath - property
2201
@dbus_annotations(
2202
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2203
"org.freedesktop.DBus.Deprecated": "true"})
1426
2204
@dbus_service_property(_interface, signature="o", access="read")
1427
2205
def ObjectPath_dbus_property(self):
1428
return self.dbus_object_path # is already a dbus.ObjectPath
1429
2206
return self.dbus_object_path # is already a dbus.ObjectPath
2207
1430
2208
# Secret = property
1431
@dbus_service_property(_interface, signature="ay",
1432
access="write", byte_arrays=True)
2209
@dbus_annotations(
2210
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2211
"invalidates"})
2212
@dbus_service_property(_interface,
2213
signature="ay",
2214
access="write",
2215
byte_arrays=True)
1433
2216
def Secret_dbus_property(self, value):
1434
self.secret = str(value)
1435
2217
self.secret = bytes(value)
2218
1436
2219
del _interface
1437
2220
1438
2221
1439
2222
class ProxyClient(object):
1440
def __init__(self, child_pipe, fpr, address):
2223
def __init__(self, child_pipe, key_id, fpr, address):
1441
2224
self._pipe = child_pipe
1442
self._pipe.send(('init', fpr, address))
2225
self._pipe.send(('init', key_id, fpr, address))
1443
2226
if not self._pipe.recv():
1444
raise KeyError()
1445
2227
raise KeyError(key_id or fpr)
2228
1446
2229
def __getattribute__(self, name):
1447
2230
if name == '_pipe':
1448
2231
return super(ProxyClient, self).__getattribute__(name)
1451
2234
if data[0] == 'data':
1452
2235
return data[1]
1453
2236
if data[0] == 'function':
2237
1454
2238
def func(*args, **kwargs):
1455
2239
self._pipe.send(('funcall', name, args, kwargs))
1456
2240
return self._pipe.recv()[1]
2241
1457
2242
return func
1458
2243
1459
2244
def __setattr__(self, name, value):
1460
2245
if name == '_pipe':
1461
2246
return super(ProxyClient, self).__setattr__(name, value)
1462
2247
self._pipe.send(('setattr', name, value))
1463
2248
1464
2249
1465
class ClientDBusTransitional(ClientDBus):
1466
__metaclass__ = AlternateDBusNamesMetaclass
1467
1468
1469
2250
class ClientHandler(socketserver.BaseRequestHandler, object):
1470
2251
"""A class to handle client connections.
1471
2252
1472
2253
Instantiated once for each connection to handle it.
1473
2254
Note: This will run in its own forked process."""
1474
2255
1475
2256
def handle(self):
1476
2257
with contextlib.closing(self.server.child_pipe) as child_pipe:
1477
2258
logger.info("TCP connection from: %s",
1478
unicode(self.client_address))
2259
str(self.client_address))
1479
2260
logger.debug("Pipe FD: %d",
1480
2261
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"))
2262
2263
session = gnutls.ClientSession(self.request)
2264
2265
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2266
# "+AES-256-CBC", "+SHA1",
2267
# "+COMP-NULL", "+CTYPE-OPENPGP",
2268
# "+DHE-DSS"))
1496
2269
# Use a fallback default, since this MUST be set.
1497
2270
priority = self.server.gnutls_priority
1498
2271
if priority is None:
1499
2272
priority = "NORMAL"
1500
(gnutls.library.functions
1501
.gnutls_priority_set_direct(session._c_object,
1502
priority, None))
1503
2273
gnutls.priority_set_direct(session._c_object,
2274
priority.encode("utf-8"),
2275
None)
2276
1504
2277
# Start communication using the Mandos protocol
1505
2278
# Get protocol number
1506
2279
line = self.request.makefile().readline()
1507
2280
logger.debug("Protocol version: %r", line)
1508
2281
try:
1509
2282
if int(line.strip().split()[0]) > 1:
1510
raise RuntimeError
2283
raise RuntimeError(line)
1511
2284
except (ValueError, IndexError, RuntimeError) as error:
1512
2285
logger.error("Unknown protocol version: %s", error)
1513
2286
return
1514
2287
1515
2288
# Start GnuTLS connection
1516
2289
try:
1517
2290
session.handshake()
1518
except gnutls.errors.GNUTLSError as error:
2291
except gnutls.Error as error:
1519
2292
logger.warning("Handshake failed: %s", error)
1520
2293
# Do not run session.bye() here: the session is not
1521
2294
# established. Just abandon the request.
1522
2295
return
1523
2296
logger.debug("Handshake succeeded")
1524
2297
1525
2298
approval_required = False
1526
2299
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,
2300
if gnutls.has_rawpk:
2301
fpr = ""
2302
try:
2303
key_id = self.key_id(
2304
self.peer_certificate(session))
2305
except (TypeError, gnutls.Error) as error:
2306
logger.warning("Bad certificate: %s", error)
2307
return
2308
logger.debug("Key ID: %s", key_id)
2309
2310
else:
2311
key_id = ""
2312
try:
2313
fpr = self.fingerprint(
2314
self.peer_certificate(session))
2315
except (TypeError, gnutls.Error) as error:
2316
logger.warning("Bad certificate: %s", error)
2317
return
2318
logger.debug("Fingerprint: %s", fpr)
2319
2320
try:
2321
client = ProxyClient(child_pipe, key_id, fpr,
1538
2322
self.client_address)
1539
2323
except KeyError:
1540
2324
return
1541
1542
if self.server.use_dbus:
1543
# Emit D-Bus signal
1544
client.NewRequest(str(self.client_address))
1545
2325
1546
2326
if client.approval_delay:
1547
2327
delay = client.approval_delay
1548
2328
client.approvals_pending += 1
1549
2329
approval_required = True
1550
2330
1551
2331
while True:
1552
2332
if not client.enabled:
1553
2333
logger.info("Client %s is disabled",
1554
client.name)
2334
client.name)
1555
2335
if self.server.use_dbus:
1556
2336
# Emit D-Bus signal
1557
2337
client.Rejected("Disabled")
1558
2338
return
1559
2339
1560
2340
if client.approved or not client.approval_delay:
1561
#We are approved or approval is disabled
2341
# We are approved or approval is disabled
1562
2342
break
1563
2343
elif client.approved is None:
1564
2344
logger.info("Client %s needs approval",
1566
2346
if self.server.use_dbus:
1567
2347
# Emit D-Bus signal
1568
2348
client.NeedApproval(
1569
client.approval_delay_milliseconds(),
1570
client.approved_by_default)
2349
client.approval_delay.total_seconds()
2350
* 1000, client.approved_by_default)
1571
2351
else:
1572
2352
logger.warning("Client %s was not approved",
1573
2353
client.name)
1575
2355
# Emit D-Bus signal
1576
2356
client.Rejected("Denied")
1577
2357
return
1578
1579
#wait until timeout or approved
2358
2359
# wait until timeout or approved
1580
2360
time = datetime.datetime.now()
1581
2361
client.changedstate.acquire()
1582
(client.changedstate.wait
1583
(float(client.timedelta_to_milliseconds(delay)
1584
/ 1000)))
2362
client.changedstate.wait(delay.total_seconds())
1585
2363
client.changedstate.release()
1586
2364
time2 = datetime.datetime.now()
1587
2365
if (time2 - time) >= delay:
1597
2375
break
1598
2376
else:
1599
2377
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
2378
2379
try:
2380
session.send(client.secret)
2381
except gnutls.Error as error:
2382
logger.warning("gnutls send failed",
2383
exc_info=error)
2384
return
2385
1613
2386
logger.info("Sending secret to %s", client.name)
1614
2387
# bump the timeout using extended_timeout
1615
client.checked_ok(client.extended_timeout)
2388
client.bump_timeout(client.extended_timeout)
1616
2389
if self.server.use_dbus:
1617
2390
# Emit D-Bus signal
1618
2391
client.GotSecret()
1619
2392
1620
2393
finally:
1621
2394
if approval_required:
1622
2395
client.approvals_pending -= 1
1623
2396
try:
1624
2397
session.bye()
1625
except gnutls.errors.GNUTLSError as error:
1626
logger.warning("GnuTLS bye failed")
1627
2398
except gnutls.Error as error:
2399
logger.warning("GnuTLS bye failed",
2400
exc_info=error)
2401
1628
2402
@staticmethod
1629
2403
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
2404
"Return the peer's certificate as a bytestring"
2405
try:
2406
cert_type = gnutls.certificate_type_get2(session._c_object,
2407
gnutls.CTYPE_PEERS)
2408
except AttributeError:
2409
cert_type = gnutls.certificate_type_get(session._c_object)
2410
if gnutls.has_rawpk:
2411
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2412
else:
2413
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2414
# If not a valid certificate type...
2415
if cert_type not in valid_cert_types:
2416
logger.info("Cert type %r not in %r", cert_type,
2417
valid_cert_types)
2418
# ...return invalid data
2419
return b""
1637
2420
list_size = ctypes.c_uint(1)
1638
cert_list = (gnutls.library.functions
1639
.gnutls_certificate_get_peers
2421
cert_list = (gnutls.certificate_get_peers
1640
2422
(session._c_object, ctypes.byref(list_size)))
1641
2423
if not bool(cert_list) and list_size.value != 0:
1642
raise gnutls.errors.GNUTLSError("error getting peer"
1643
" certificate")
2424
raise gnutls.Error("error getting peer certificate")
1644
2425
if list_size.value == 0:
1645
2426
return None
1646
2427
cert = cert_list[0]
1647
2428
return ctypes.string_at(cert.data, cert.size)
1648
2429
2430
@staticmethod
2431
def key_id(certificate):
2432
"Convert a certificate bytestring to a hexdigit key ID"
2433
# New GnuTLS "datum" with the public key
2434
datum = gnutls.datum_t(
2435
ctypes.cast(ctypes.c_char_p(certificate),
2436
ctypes.POINTER(ctypes.c_ubyte)),
2437
ctypes.c_uint(len(certificate)))
2438
# XXX all these need to be created in the gnutls "module"
2439
# New empty GnuTLS certificate
2440
pubkey = gnutls.pubkey_t()
2441
gnutls.pubkey_init(ctypes.byref(pubkey))
2442
# Import the raw public key into the certificate
2443
gnutls.pubkey_import(pubkey,
2444
ctypes.byref(datum),
2445
gnutls.X509_FMT_DER)
2446
# New buffer for the key ID
2447
buf = ctypes.create_string_buffer(32)
2448
buf_len = ctypes.c_size_t(len(buf))
2449
# Get the key ID from the raw public key into the buffer
2450
gnutls.pubkey_get_key_id(pubkey,
2451
gnutls.KEYID_USE_SHA256,
2452
ctypes.cast(ctypes.byref(buf),
2453
ctypes.POINTER(ctypes.c_ubyte)),
2454
ctypes.byref(buf_len))
2455
# Deinit the certificate
2456
gnutls.pubkey_deinit(pubkey)
2457
2458
# Convert the buffer to a Python bytestring
2459
key_id = ctypes.string_at(buf, buf_len.value)
2460
# Convert the bytestring to hexadecimal notation
2461
hex_key_id = binascii.hexlify(key_id).upper()
2462
return hex_key_id
2463
1649
2464
@staticmethod
1650
2465
def fingerprint(openpgp):
1651
2466
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1652
2467
# 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))))
2468
datum = gnutls.datum_t(
2469
ctypes.cast(ctypes.c_char_p(openpgp),
2470
ctypes.POINTER(ctypes.c_ubyte)),
2471
ctypes.c_uint(len(openpgp)))
1658
2472
# 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)))
2473
crt = gnutls.openpgp_crt_t()
2474
gnutls.openpgp_crt_init(ctypes.byref(crt))
1662
2475
# 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))
2476
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2477
gnutls.OPENPGP_FMT_RAW)
1667
2478
# Verify the self signature in the key
1668
2479
crtverify = ctypes.c_uint()
1669
(gnutls.library.functions
1670
.gnutls_openpgp_crt_verify_self(crt, 0,
1671
ctypes.byref(crtverify)))
2480
gnutls.openpgp_crt_verify_self(crt, 0,
2481
ctypes.byref(crtverify))
1672
2482
if crtverify.value != 0:
1673
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1674
raise (gnutls.errors.CertificateSecurityError
1675
("Verify failed"))
2483
gnutls.openpgp_crt_deinit(crt)
2484
raise gnutls.CertificateSecurityError(code
2485
=crtverify.value)
1676
2486
# New buffer for the fingerprint
1677
2487
buf = ctypes.create_string_buffer(20)
1678
2488
buf_len = ctypes.c_size_t()
1679
2489
# 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)))
2490
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2491
ctypes.byref(buf_len))
1683
2492
# Deinit the certificate
1684
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2493
gnutls.openpgp_crt_deinit(crt)
1685
2494
# Convert the buffer to a Python bytestring
1686
2495
fpr = ctypes.string_at(buf, buf_len.value)
1687
2496
# Convert the bytestring to hexadecimal notation
1691
2500
1692
2501
class MultiprocessingMixIn(object):
1693
2502
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2503
1694
2504
def sub_process_main(self, request, address):
1695
2505
try:
1696
2506
self.finish_request(request, address)
1697
2507
except Exception:
1698
2508
self.handle_error(request, address)
1699
2509
self.close_request(request)
1700
2510
1701
2511
def process_request(self, request, address):
1702
2512
"""Start a new process to process the request."""
1703
proc = multiprocessing.Process(target = self.sub_process_main,
1704
args = (request,
1705
address))
2513
proc = multiprocessing.Process(target=self.sub_process_main,
2514
args=(request, address))
1706
2515
proc.start()
1707
2516
return proc
1708
2517
1709
2518
1710
2519
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1711
2520
""" adds a pipe to the MixIn """
2521
1712
2522
def process_request(self, request, client_address):
1713
2523
"""Overrides and wraps the original process_request().
1714
2524
1715
2525
This function creates a new pipe in self.pipe
1716
2526
"""
1717
2527
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1718
2528
1719
2529
proc = MultiprocessingMixIn.process_request(self, request,
1720
2530
client_address)
1721
2531
self.child_pipe.close()
1722
2532
self.add_pipe(parent_pipe, proc)
1723
2533
1724
2534
def add_pipe(self, parent_pipe, proc):
1725
2535
"""Dummy function; override as necessary"""
1726
raise NotImplementedError
2536
raise NotImplementedError()
1727
2537
1728
2538
1729
2539
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1730
2540
socketserver.TCPServer, object):
1731
2541
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1732
2542
1733
2543
Attributes:
1734
2544
enabled: Boolean; whether this server is activated yet
1735
2545
interface: None or a network interface name (string)
1736
2546
use_ipv6: Boolean; to use IPv6 or not
1737
2547
"""
2548
1738
2549
def __init__(self, server_address, RequestHandlerClass,
1739
interface=None, use_ipv6=True):
2550
interface=None,
2551
use_ipv6=True,
2552
socketfd=None):
2553
"""If socketfd is set, use that file descriptor instead of
2554
creating a new one with socket.socket().
2555
"""
1740
2556
self.interface = interface
1741
2557
if use_ipv6:
1742
2558
self.address_family = socket.AF_INET6
2559
if socketfd is not None:
2560
# Save the file descriptor
2561
self.socketfd = socketfd
2562
# Save the original socket.socket() function
2563
self.socket_socket = socket.socket
2564
2565
# To implement --socket, we monkey patch socket.socket.
2566
#
2567
# (When socketserver.TCPServer is a new-style class, we
2568
# could make self.socket into a property instead of monkey
2569
# patching socket.socket.)
2570
#
2571
# Create a one-time-only replacement for socket.socket()
2572
@functools.wraps(socket.socket)
2573
def socket_wrapper(*args, **kwargs):
2574
# Restore original function so subsequent calls are
2575
# not affected.
2576
socket.socket = self.socket_socket
2577
del self.socket_socket
2578
# This time only, return a new socket object from the
2579
# saved file descriptor.
2580
return socket.fromfd(self.socketfd, *args, **kwargs)
2581
# Replace socket.socket() function with wrapper
2582
socket.socket = socket_wrapper
2583
# The socketserver.TCPServer.__init__ will call
2584
# socket.socket(), which might be our replacement,
2585
# socket_wrapper(), if socketfd was set.
1743
2586
socketserver.TCPServer.__init__(self, server_address,
1744
2587
RequestHandlerClass)
2588
1745
2589
def server_bind(self):
1746
2590
"""This overrides the normal server_bind() function
1747
2591
to bind to an interface if one was specified, and also NOT to
1748
2592
bind to an address or port if they were not specified."""
2593
global SO_BINDTODEVICE
1749
2594
if self.interface is not None:
1750
2595
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
2596
# Fall back to a hard-coded value which seems to be
2597
# common enough.
2598
logger.warning("SO_BINDTODEVICE not found, trying 25")
2599
SO_BINDTODEVICE = 25
2600
try:
2601
self.socket.setsockopt(
2602
socket.SOL_SOCKET, SO_BINDTODEVICE,
2603
(self.interface + "\0").encode("utf-8"))
2604
except socket.error as error:
2605
if error.errno == errno.EPERM:
2606
logger.error("No permission to bind to"
2607
" interface %s", self.interface)
2608
elif error.errno == errno.ENOPROTOOPT:
2609
logger.error("SO_BINDTODEVICE not available;"
2610
" cannot bind to interface %s",
2611
self.interface)
2612
elif error.errno == errno.ENODEV:
2613
logger.error("Interface %s does not exist,"
2614
" cannot bind", self.interface)
2615
else:
2616
raise
1771
2617
# Only bind(2) the socket if we really need to.
1772
2618
if self.server_address[0] or self.server_address[1]:
1773
2619
if not self.server_address[0]:
1774
2620
if self.address_family == socket.AF_INET6:
1775
any_address = "::" # in6addr_any
2621
any_address = "::" # in6addr_any
1776
2622
else:
1777
any_address = socket.INADDR_ANY
2623
any_address = "0.0.0.0" # INADDR_ANY
1778
2624
self.server_address = (any_address,
1779
2625
self.server_address[1])
1780
2626
elif not self.server_address[1]:
1781
self.server_address = (self.server_address[0],
1782
0)
2627
self.server_address = (self.server_address[0], 0)
1783
2628
# if self.interface:
1784
2629
# self.server_address = (self.server_address[0],
1785
2630
# 0, # port
1791
2636
1792
2637
class MandosServer(IPv6_TCPServer):
1793
2638
"""Mandos server.
1794
2639
1795
2640
Attributes:
1796
2641
clients: set of Client objects
1797
2642
gnutls_priority GnuTLS priority string
1798
2643
use_dbus: Boolean; to emit D-Bus signals or not
1799
1800
Assumes a gobject.MainLoop event loop.
2644
2645
Assumes a GLib.MainLoop event loop.
1801
2646
"""
2647
1802
2648
def __init__(self, server_address, RequestHandlerClass,
1803
interface=None, use_ipv6=True, clients=None,
1804
gnutls_priority=None, use_dbus=True):
2649
interface=None,
2650
use_ipv6=True,
2651
clients=None,
2652
gnutls_priority=None,
2653
use_dbus=True,
2654
socketfd=None):
1805
2655
self.enabled = False
1806
2656
self.clients = clients
1807
2657
if self.clients is None:
1810
2660
self.gnutls_priority = gnutls_priority
1811
2661
IPv6_TCPServer.__init__(self, server_address,
1812
2662
RequestHandlerClass,
1813
interface = interface,
1814
use_ipv6 = use_ipv6)
2663
interface=interface,
2664
use_ipv6=use_ipv6,
2665
socketfd=socketfd)
2666
1815
2667
def server_activate(self):
1816
2668
if self.enabled:
1817
2669
return socketserver.TCPServer.server_activate(self)
1818
2670
1819
2671
def enable(self):
1820
2672
self.enabled = True
1821
2673
1822
2674
def add_pipe(self, parent_pipe, proc):
1823
2675
# 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)
2676
GLib.io_add_watch(
2677
parent_pipe.fileno(),
2678
GLib.IO_IN | GLib.IO_HUP,
2679
functools.partial(self.handle_ipc,
2680
parent_pipe=parent_pipe,
2681
proc=proc))
2682
2683
def handle_ipc(self, source, condition,
2684
parent_pipe=None,
2685
proc=None,
2686
client_object=None):
1847
2687
# error, or the other end of multiprocessing.Pipe has closed
1848
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2688
if condition & (GLib.IO_ERR | GLib.IO_HUP):
1849
2689
# Wait for other process to exit
1850
2690
proc.join()
1851
2691
return False
1852
2692
1853
2693
# Read a request from the child
1854
2694
request = parent_pipe.recv()
1855
2695
command = request[0]
1856
2696
1857
2697
if command == 'init':
1858
fpr = request[1]
1859
address = request[2]
1860
1861
for c in self.clients.itervalues():
1862
if c.fingerprint == fpr:
2698
key_id = request[1].decode("ascii")
2699
fpr = request[2].decode("ascii")
2700
address = request[3]
2701
2702
for c in self.clients.values():
2703
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2704
continue
2705
if key_id and c.key_id == key_id:
2706
client = c
2707
break
2708
if fpr and c.fingerprint == fpr:
1863
2709
client = c
1864
2710
break
1865
2711
else:
1866
logger.info("Client not found for fingerprint: %s, ad"
1867
"dress: %s", fpr, address)
2712
logger.info("Client not found for key ID: %s, address"
2713
": %s", key_id or fpr, address)
1868
2714
if self.use_dbus:
1869
2715
# Emit D-Bus signal
1870
mandos_dbus_service.ClientNotFound(fpr,
2716
mandos_dbus_service.ClientNotFound(key_id or fpr,
1871
2717
address[0])
1872
2718
parent_pipe.send(False)
1873
2719
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))
2720
2721
GLib.io_add_watch(
2722
parent_pipe.fileno(),
2723
GLib.IO_IN | GLib.IO_HUP,
2724
functools.partial(self.handle_ipc,
2725
parent_pipe=parent_pipe,
2726
proc=proc,
2727
client_object=client))
1883
2728
parent_pipe.send(True)
1884
2729
# remove the old hook in favor of the new above hook on
1885
2730
# same fileno
1888
2733
funcname = request[1]
1889
2734
args = request[2]
1890
2735
kwargs = request[3]
1891
2736
1892
2737
parent_pipe.send(('data', getattr(client_object,
1893
2738
funcname)(*args,
1894
**kwargs)))
1895
2739
**kwargs)))
2740
1896
2741
if command == 'getattr':
1897
2742
attrname = request[1]
1898
if callable(client_object.__getattribute__(attrname)):
1899
parent_pipe.send(('function',))
2743
if isinstance(client_object.__getattribute__(attrname),
2744
collections.Callable):
2745
parent_pipe.send(('function', ))
1900
2746
else:
1901
parent_pipe.send(('data', client_object
1902
.__getattribute__(attrname)))
1903
2747
parent_pipe.send((
2748
'data', client_object.__getattribute__(attrname)))
2749
1904
2750
if command == 'setattr':
1905
2751
attrname = request[1]
1906
2752
value = request[2]
1907
2753
setattr(client_object, attrname, value)
1908
2754
1909
2755
return True
1910
2756
1911
2757
2758
def rfc3339_duration_to_delta(duration):
2759
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2760
2761
>>> rfc3339_duration_to_delta("P7D")
2762
datetime.timedelta(7)
2763
>>> rfc3339_duration_to_delta("PT60S")
2764
datetime.timedelta(0, 60)
2765
>>> rfc3339_duration_to_delta("PT60M")
2766
datetime.timedelta(0, 3600)
2767
>>> rfc3339_duration_to_delta("PT24H")
2768
datetime.timedelta(1)
2769
>>> rfc3339_duration_to_delta("P1W")
2770
datetime.timedelta(7)
2771
>>> rfc3339_duration_to_delta("PT5M30S")
2772
datetime.timedelta(0, 330)
2773
>>> rfc3339_duration_to_delta("P1DT3M20S")
2774
datetime.timedelta(1, 200)
2775
"""
2776
2777
# Parsing an RFC 3339 duration with regular expressions is not
2778
# possible - there would have to be multiple places for the same
2779
# values, like seconds. The current code, while more esoteric, is
2780
# cleaner without depending on a parsing library. If Python had a
2781
# built-in library for parsing we would use it, but we'd like to
2782
# avoid excessive use of external libraries.
2783
2784
# New type for defining tokens, syntax, and semantics all-in-one
2785
Token = collections.namedtuple("Token", (
2786
"regexp", # To match token; if "value" is not None, must have
2787
# a "group" containing digits
2788
"value", # datetime.timedelta or None
2789
"followers")) # Tokens valid after this token
2790
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2791
# the "duration" ABNF definition in RFC 3339, Appendix A.
2792
token_end = Token(re.compile(r"$"), None, frozenset())
2793
token_second = Token(re.compile(r"(\d+)S"),
2794
datetime.timedelta(seconds=1),
2795
frozenset((token_end, )))
2796
token_minute = Token(re.compile(r"(\d+)M"),
2797
datetime.timedelta(minutes=1),
2798
frozenset((token_second, token_end)))
2799
token_hour = Token(re.compile(r"(\d+)H"),
2800
datetime.timedelta(hours=1),
2801
frozenset((token_minute, token_end)))
2802
token_time = Token(re.compile(r"T"),
2803
None,
2804
frozenset((token_hour, token_minute,
2805
token_second)))
2806
token_day = Token(re.compile(r"(\d+)D"),
2807
datetime.timedelta(days=1),
2808
frozenset((token_time, token_end)))
2809
token_month = Token(re.compile(r"(\d+)M"),
2810
datetime.timedelta(weeks=4),
2811
frozenset((token_day, token_end)))
2812
token_year = Token(re.compile(r"(\d+)Y"),
2813
datetime.timedelta(weeks=52),
2814
frozenset((token_month, token_end)))
2815
token_week = Token(re.compile(r"(\d+)W"),
2816
datetime.timedelta(weeks=1),
2817
frozenset((token_end, )))
2818
token_duration = Token(re.compile(r"P"), None,
2819
frozenset((token_year, token_month,
2820
token_day, token_time,
2821
token_week)))
2822
# Define starting values:
2823
# Value so far
2824
value = datetime.timedelta()
2825
found_token = None
2826
# Following valid tokens
2827
followers = frozenset((token_duration, ))
2828
# String left to parse
2829
s = duration
2830
# Loop until end token is found
2831
while found_token is not token_end:
2832
# Search for any currently valid tokens
2833
for token in followers:
2834
match = token.regexp.match(s)
2835
if match is not None:
2836
# Token found
2837
if token.value is not None:
2838
# Value found, parse digits
2839
factor = int(match.group(1), 10)
2840
# Add to value so far
2841
value += factor * token.value
2842
# Strip token from string
2843
s = token.regexp.sub("", s, 1)
2844
# Go to found token
2845
found_token = token
2846
# Set valid next tokens
2847
followers = found_token.followers
2848
break
2849
else:
2850
# No currently valid tokens were found
2851
raise ValueError("Invalid RFC 3339 duration: {!r}"
2852
.format(duration))
2853
# End token found
2854
return value
2855
2856
1912
2857
def string_to_delta(interval):
1913
2858
"""Parse a string and return a datetime.timedelta
1914
2859
1915
2860
>>> string_to_delta('7d')
1916
2861
datetime.timedelta(7)
1917
2862
>>> string_to_delta('60s')
1925
2870
>>> string_to_delta('5m 30s')
1926
2871
datetime.timedelta(0, 330)
1927
2872
"""
2873
2874
try:
2875
return rfc3339_duration_to_delta(interval)
2876
except ValueError:
2877
pass
2878
1928
2879
timevalue = datetime.timedelta(0)
1929
2880
for s in interval.split():
1930
2881
try:
1931
suffix = unicode(s[-1])
2882
suffix = s[-1]
1932
2883
value = int(s[:-1])
1933
2884
if suffix == "d":
1934
2885
delta = datetime.timedelta(value)
1941
2892
elif suffix == "w":
1942
2893
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1943
2894
else:
1944
raise ValueError("Unknown suffix %r" % suffix)
1945
except (ValueError, IndexError) as e:
2895
raise ValueError("Unknown suffix {!r}".format(suffix))
2896
except IndexError as e:
1946
2897
raise ValueError(*(e.args))
1947
2898
timevalue += delta
1948
2899
return timevalue
1949
2900
1950
2901
1951
def daemon(nochdir = False, noclose = False):
2902
def daemon(nochdir=False, noclose=False):
1952
2903
"""See daemon(3). Standard BSD Unix function.
1953
2904
1954
2905
This should really exist as os.daemon, but it doesn't (yet)."""
1955
2906
if os.fork():
1956
2907
sys.exit()
1961
2912
sys.exit()
1962
2913
if not noclose:
1963
2914
# Close all standard open file descriptors
1964
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2915
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1965
2916
if not stat.S_ISCHR(os.fstat(null).st_mode):
1966
2917
raise OSError(errno.ENODEV,
1967
"%s not a character device"
1968
% os.path.devnull)
2918
"{} not a character device"
2919
.format(os.devnull))
1969
2920
os.dup2(null, sys.stdin.fileno())
1970
2921
os.dup2(null, sys.stdout.fileno())
1971
2922
os.dup2(null, sys.stderr.fileno())
1974
2925
1975
2926
1976
2927
def main():
1977
2928
1978
2929
##################################################################
1979
2930
# Parsing of options, both command line and config file
1980
2931
1981
2932
parser = argparse.ArgumentParser()
1982
2933
parser.add_argument("-v", "--version", action="version",
1983
version = "%%(prog)s %s" % version,
2934
version="%(prog)s {}".format(version),
1984
2935
help="show version number and exit")
1985
2936
parser.add_argument("-i", "--interface", metavar="IF",
1986
2937
help="Bind to interface IF")
1992
2943
help="Run self-test")
1993
2944
parser.add_argument("--debug", action="store_true",
1994
2945
help="Debug mode; run in foreground and log"
1995
" to terminal")
2946
" to terminal", default=None)
1996
2947
parser.add_argument("--debuglevel", metavar="LEVEL",
1997
2948
help="Debug level for stdout output")
1998
2949
parser.add_argument("--priority", help="GnuTLS"
2005
2956
" files")
2006
2957
parser.add_argument("--no-dbus", action="store_false",
2007
2958
dest="use_dbus", help="Do not provide D-Bus"
2008
" system bus interface")
2959
" system bus interface", default=None)
2009
2960
parser.add_argument("--no-ipv6", action="store_false",
2010
dest="use_ipv6", help="Do not use IPv6")
2961
dest="use_ipv6", help="Do not use IPv6",
2962
default=None)
2011
2963
parser.add_argument("--no-restore", action="store_false",
2012
2964
dest="restore", help="Do not restore stored"
2013
" state")
2965
" state", default=None)
2966
parser.add_argument("--socket", type=int,
2967
help="Specify a file descriptor to a network"
2968
" socket to use instead of creating one")
2014
2969
parser.add_argument("--statedir", metavar="DIR",
2015
2970
help="Directory to save/restore state in")
2016
2971
parser.add_argument("--foreground", action="store_true",
2972
help="Run in foreground", default=None)
2973
parser.add_argument("--no-zeroconf", action="store_false",
2974
dest="zeroconf", help="Do not use Zeroconf",
2975
default=None)
2976
2017
2977
options = parser.parse_args()
2018
2978
2019
2979
if options.check:
2020
2980
import doctest
2021
doctest.testmod()
2022
sys.exit()
2023
2981
fail_count, test_count = doctest.testmod()
2982
sys.exit(os.EX_OK if fail_count == 0 else 1)
2983
2024
2984
# 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
2985
if gnutls.has_rawpk:
2986
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2987
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2988
else:
2989
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2990
":+SIGN-DSA-SHA256")
2991
server_defaults = {"interface": "",
2992
"address": "",
2993
"port": "",
2994
"debug": "False",
2995
"priority": priority,
2996
"servicename": "Mandos",
2997
"use_dbus": "True",
2998
"use_ipv6": "True",
2999
"debuglevel": "",
3000
"restore": "True",
3001
"socket": "",
3002
"statedir": "/var/lib/mandos",
3003
"foreground": "False",
3004
"zeroconf": "True",
3005
}
3006
del priority
3007
2039
3008
# Parse config file for server-global settings
2040
3009
server_config = configparser.SafeConfigParser(server_defaults)
2041
3010
del server_defaults
2042
server_config.read(os.path.join(options.configdir,
2043
"mandos.conf"))
3011
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2044
3012
# Convert the SafeConfigParser object to a dict
2045
3013
server_settings = server_config.defaults()
2046
3014
# Use the appropriate methods on the non-string config options
2047
for option in ("debug", "use_dbus", "use_ipv6"):
3015
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3016
"foreground", "zeroconf"):
2048
3017
server_settings[option] = server_config.getboolean("DEFAULT",
2049
3018
option)
2050
3019
if server_settings["port"]:
2051
3020
server_settings["port"] = server_config.getint("DEFAULT",
2052
3021
"port")
3022
if server_settings["socket"]:
3023
server_settings["socket"] = server_config.getint("DEFAULT",
3024
"socket")
3025
# Later, stdin will, and stdout and stderr might, be dup'ed
3026
# over with an opened os.devnull. But we don't want this to
3027
# happen with a supplied network socket.
3028
if 0 <= server_settings["socket"] <= 2:
3029
server_settings["socket"] = os.dup(server_settings
3030
["socket"])
2053
3031
del server_config
2054
3032
2055
3033
# Override the settings from the config file with command line
2056
3034
# options, if set.
2057
3035
for option in ("interface", "address", "port", "debug",
2058
"priority", "servicename", "configdir",
2059
"use_dbus", "use_ipv6", "debuglevel", "restore",
2060
"statedir"):
3036
"priority", "servicename", "configdir", "use_dbus",
3037
"use_ipv6", "debuglevel", "restore", "statedir",
3038
"socket", "foreground", "zeroconf"):
2061
3039
value = getattr(options, option)
2062
3040
if value is not None:
2063
3041
server_settings[option] = value
2064
3042
del options
2065
3043
# Force all strings to be unicode
2066
3044
for option in server_settings.keys():
2067
if type(server_settings[option]) is str:
2068
server_settings[option] = unicode(server_settings[option])
3045
if isinstance(server_settings[option], bytes):
3046
server_settings[option] = (server_settings[option]
3047
.decode("utf-8"))
3048
# Force all boolean options to be boolean
3049
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3050
"foreground", "zeroconf"):
3051
server_settings[option] = bool(server_settings[option])
3052
# Debug implies foreground
3053
if server_settings["debug"]:
3054
server_settings["foreground"] = True
2069
3055
# Now we have our good server settings in "server_settings"
2070
3056
2071
3057
##################################################################
2072
3058
3059
if (not server_settings["zeroconf"]
3060
and not (server_settings["port"]
3061
or server_settings["socket"] != "")):
3062
parser.error("Needs port or socket to work without Zeroconf")
3063
2073
3064
# For convenience
2074
3065
debug = server_settings["debug"]
2075
3066
debuglevel = server_settings["debuglevel"]
2077
3068
use_ipv6 = server_settings["use_ipv6"]
2078
3069
stored_state_path = os.path.join(server_settings["statedir"],
2079
3070
stored_state_file)
2080
3071
foreground = server_settings["foreground"]
3072
zeroconf = server_settings["zeroconf"]
3073
2081
3074
if debug:
2082
3075
initlogger(debug, logging.DEBUG)
2083
3076
else:
2086
3079
else:
2087
3080
level = getattr(logging, debuglevel.upper())
2088
3081
initlogger(debug, level)
2089
3082
2090
3083
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
3084
syslogger.setFormatter(
3085
logging.Formatter('Mandos ({}) [%(process)d]:'
3086
' %(levelname)s: %(message)s'.format(
3087
server_settings["servicename"])))
3088
2096
3089
# Parse config file with clients
2097
client_config = configparser.SafeConfigParser(Client.client_defaults)
3090
client_config = configparser.SafeConfigParser(Client
3091
.client_defaults)
2098
3092
client_config.read(os.path.join(server_settings["configdir"],
2099
3093
"clients.conf"))
2100
3094
2101
3095
global mandos_dbus_service
2102
3096
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
3097
3098
socketfd = None
3099
if server_settings["socket"] != "":
3100
socketfd = server_settings["socket"]
3101
tcp_server = MandosServer(
3102
(server_settings["address"], server_settings["port"]),
3103
ClientHandler,
3104
interface=(server_settings["interface"] or None),
3105
use_ipv6=use_ipv6,
3106
gnutls_priority=server_settings["priority"],
3107
use_dbus=use_dbus,
3108
socketfd=socketfd)
3109
if not foreground:
3110
pidfilename = "/run/mandos.pid"
3111
if not os.path.isdir("/run/."):
3112
pidfilename = "/var/run/mandos.pid"
3113
pidfile = None
3114
try:
3115
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3116
except IOError as e:
3117
logger.error("Could not open file %r", pidfilename,
3118
exc_info=e)
3119
3120
for name, group in (("_mandos", "_mandos"),
3121
("mandos", "mandos"),
3122
("nobody", "nogroup")):
3123
try:
3124
uid = pwd.getpwnam(name).pw_uid
3125
gid = pwd.getpwnam(group).pw_gid
3126
break
2127
3127
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
3128
continue
3129
else:
3130
uid = 65534
3131
gid = 65534
2134
3132
try:
2135
3133
os.setgid(gid)
2136
3134
os.setuid(uid)
3135
if debug:
3136
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3137
gid))
2137
3138
except OSError as error:
2138
if error[0] != errno.EPERM:
2139
raise error
2140
3139
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3140
.format(uid, gid, os.strerror(error.errno)))
3141
if error.errno != errno.EPERM:
3142
raise
3143
2141
3144
if debug:
2142
3145
# Enable all possible GnuTLS debugging
2143
3146
2144
3147
# "Use a log level over 10 to enable all debugging options."
2145
3148
# - GnuTLS manual
2146
gnutls.library.functions.gnutls_global_set_log_level(11)
2147
2148
@gnutls.library.types.gnutls_log_func
3149
gnutls.global_set_log_level(11)
3150
3151
@gnutls.log_func
2149
3152
def debug_gnutls(level, string):
2150
3153
logger.debug("GnuTLS: %s", string[:-1])
2151
2152
(gnutls.library.functions
2153
.gnutls_global_set_log_function(debug_gnutls))
2154
3154
3155
gnutls.global_set_log_function(debug_gnutls)
3156
2155
3157
# Redirect stdin so all checkers get /dev/null
2156
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3158
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2157
3159
os.dup2(null, sys.stdin.fileno())
2158
3160
if null > 2:
2159
3161
os.close(null)
2160
3162
2161
3163
# Need to fork before connecting to D-Bus
2162
if not debug:
3164
if not foreground:
2163
3165
# Close all input and output, do double fork, etc.
2164
3166
daemon()
2165
2166
gobject.threads_init()
2167
3167
3168
# multiprocessing will use threads, so before we use GLib we need
3169
# to inform GLib that threads will be used.
3170
GLib.threads_init()
3171
2168
3172
global main_loop
2169
3173
# From the Avahi example code
2170
DBusGMainLoop(set_as_default=True )
2171
main_loop = gobject.MainLoop()
3174
DBusGMainLoop(set_as_default=True)
3175
main_loop = GLib.MainLoop()
2172
3176
bus = dbus.SystemBus()
2173
3177
# End of Avahi example code
2174
3178
if use_dbus:
2175
3179
try:
2176
3180
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")
3181
bus,
3182
do_not_queue=True)
3183
old_bus_name = dbus.service.BusName(
3184
"se.bsnet.fukt.Mandos", bus,
3185
do_not_queue=True)
3186
except dbus.exceptions.DBusException as e:
3187
logger.error("Disabling D-Bus:", exc_info=e)
2183
3188
use_dbus = False
2184
3189
server_settings["use_dbus"] = False
2185
3190
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
3191
if zeroconf:
3192
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3193
service = AvahiServiceToSyslog(
3194
name=server_settings["servicename"],
3195
servicetype="_mandos._tcp",
3196
protocol=protocol,
3197
bus=bus)
3198
if server_settings["interface"]:
3199
service.interface = if_nametoindex(
3200
server_settings["interface"].encode("utf-8"))
3201
2195
3202
global multiprocessing_manager
2196
3203
multiprocessing_manager = multiprocessing.Manager()
2197
3204
2198
3205
client_class = Client
2199
3206
if use_dbus:
2200
client_class = functools.partial(ClientDBusTransitional,
2201
bus = bus)
2202
3207
client_class = functools.partial(ClientDBus, bus=bus)
3208
2203
3209
client_settings = Client.config_parser(client_config)
2204
3210
old_client_settings = {}
2205
3211
clients_data = {}
2206
3212
3213
# This is used to redirect stdout and stderr for checker processes
3214
global wnull
3215
wnull = open(os.devnull, "w") # A writable /dev/null
3216
# Only used if server is running in foreground but not in debug
3217
# mode
3218
if debug or not foreground:
3219
wnull.close()
3220
2207
3221
# Get client data and settings from last running state.
2208
3222
if server_settings["restore"]:
2209
3223
try:
2210
3224
with open(stored_state_path, "rb") as stored_state:
2211
clients_data, old_client_settings = (pickle.load
2212
(stored_state))
3225
if sys.version_info.major == 2:
3226
clients_data, old_client_settings = pickle.load(
3227
stored_state)
3228
else:
3229
bytes_clients_data, bytes_old_client_settings = (
3230
pickle.load(stored_state, encoding="bytes"))
3231
# Fix bytes to strings
3232
# clients_data
3233
# .keys()
3234
clients_data = {(key.decode("utf-8")
3235
if isinstance(key, bytes)
3236
else key): value
3237
for key, value in
3238
bytes_clients_data.items()}
3239
del bytes_clients_data
3240
for key in clients_data:
3241
value = {(k.decode("utf-8")
3242
if isinstance(k, bytes) else k): v
3243
for k, v in
3244
clients_data[key].items()}
3245
clients_data[key] = value
3246
# .client_structure
3247
value["client_structure"] = [
3248
(s.decode("utf-8")
3249
if isinstance(s, bytes)
3250
else s) for s in
3251
value["client_structure"]]
3252
# .name & .host
3253
for k in ("name", "host"):
3254
if isinstance(value[k], bytes):
3255
value[k] = value[k].decode("utf-8")
3256
if not value.has_key("key_id"):
3257
value["key_id"] = ""
3258
elif not value.has_key("fingerprint"):
3259
value["fingerprint"] = ""
3260
# old_client_settings
3261
# .keys()
3262
old_client_settings = {
3263
(key.decode("utf-8")
3264
if isinstance(key, bytes)
3265
else key): value
3266
for key, value in
3267
bytes_old_client_settings.items()}
3268
del bytes_old_client_settings
3269
# .host
3270
for value in old_client_settings.values():
3271
if isinstance(value["host"], bytes):
3272
value["host"] = (value["host"]
3273
.decode("utf-8"))
2213
3274
os.remove(stored_state_path)
2214
3275
except IOError as e:
2215
logger.warning("Could not load persistent state: {0}"
2216
.format(e))
2217
if e.errno != errno.ENOENT:
3276
if e.errno == errno.ENOENT:
3277
logger.warning("Could not load persistent state:"
3278
" {}".format(os.strerror(e.errno)))
3279
else:
3280
logger.critical("Could not load persistent state:",
3281
exc_info=e)
2218
3282
raise
2219
3283
except EOFError as e:
2220
3284
logger.warning("Could not load persistent state: "
2221
"EOFError: {0}".format(e))
2222
3285
"EOFError:",
3286
exc_info=e)
3287
2223
3288
with PGPEngine() as pgp:
2224
for client_name, client in clients_data.iteritems():
3289
for client_name, client in clients_data.items():
3290
# Skip removed clients
3291
if client_name not in client_settings:
3292
continue
3293
2225
3294
# Decide which value to use after restoring saved state.
2226
3295
# We have three different values: Old config file,
2227
3296
# new config file, and saved state.
2232
3301
# For each value in new config, check if it
2233
3302
# differs from the old config value (Except for
2234
3303
# the "secret" attribute)
2235
if (name != "secret" and
2236
value != old_client_settings[client_name]
2237
[name]):
3304
if (name != "secret"
3305
and (value !=
3306
old_client_settings[client_name][name])):
2238
3307
client[name] = value
2239
3308
except KeyError:
2240
3309
pass
2241
3310
2242
3311
# 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.
3312
# enabled if its last checker was successful. A Client
3313
# whose checker succeeded before we stored its state is
3314
# assumed to have successfully run all checkers during
3315
# downtime.
2246
3316
if client["enabled"]:
2247
3317
if datetime.datetime.utcnow() >= client["expires"]:
2248
3318
if not client["last_checked_ok"]:
2249
3319
logger.warning(
2250
"disabling client {0} - Client never "
2251
"performed a successfull checker"
2252
.format(client["name"]))
3320
"disabling client {} - Client never "
3321
"performed a successful checker".format(
3322
client_name))
2253
3323
client["enabled"] = False
2254
3324
elif client["last_checker_status"] != 0:
2255
3325
logger.warning(
2256
"disabling client {0} - Client "
2257
"last checker failed with error code {1}"
2258
.format(client["name"],
2259
client["last_checker_status"]))
3326
"disabling client {} - Client last"
3327
" checker failed with error code"
3328
" {}".format(
3329
client_name,
3330
client["last_checker_status"]))
2260
3331
client["enabled"] = False
2261
3332
else:
2262
client["expires"] = (datetime.datetime
2263
.utcnow()
2264
+ client["timeout"])
2265
3333
client["expires"] = (
3334
datetime.datetime.utcnow()
3335
+ client["timeout"])
3336
logger.debug("Last checker succeeded,"
3337
" keeping {} enabled".format(
3338
client_name))
2266
3339
try:
2267
client["secret"] = (
2268
pgp.decrypt(client["encrypted_secret"],
2269
client_settings[client_name]
2270
["secret"]))
3340
client["secret"] = pgp.decrypt(
3341
client["encrypted_secret"],
3342
client_settings[client_name]["secret"])
2271
3343
except PGPError:
2272
3344
# 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"])
3345
logger.debug("Failed to decrypt {} old secret".format(
3346
client_name))
3347
client["secret"] = (client_settings[client_name]
3348
["secret"])
2277
3349
2278
2279
3350
# Add/remove clients based on new changes made to config
2280
for client_name in set(old_client_settings) - set(client_settings):
3351
for client_name in (set(old_client_settings)
3352
- set(client_settings)):
2281
3353
del clients_data[client_name]
2282
for client_name in set(client_settings) - set(old_client_settings):
3354
for client_name in (set(client_settings)
3355
- set(old_client_settings)):
2283
3356
clients_data[client_name] = client_settings[client_name]
2284
3357
2285
# Create clients all clients
2286
for client_name, client in clients_data.iteritems():
3358
# Create all client objects
3359
for client_name, client in clients_data.items():
2287
3360
tcp_server.clients[client_name] = client_class(
2288
name = client_name, settings = client)
2289
3361
name=client_name,
3362
settings=client,
3363
server_settings=server_settings)
3364
2290
3365
if not tcp_server.clients:
2291
3366
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
3367
3368
if not foreground:
3369
if pidfile is not None:
3370
pid = os.getpid()
3371
try:
3372
with pidfile:
3373
print(pid, file=pidfile)
3374
except IOError:
3375
logger.error("Could not write to file %r with PID %d",
3376
pidfilename, pid)
3377
del pidfile
2305
3378
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
3379
3380
for termsig in (signal.SIGHUP, signal.SIGTERM):
3381
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3382
lambda: main_loop.quit() and False)
3383
2311
3384
if use_dbus:
2312
class MandosDBusService(dbus.service.Object):
3385
3386
@alternate_dbus_interfaces(
3387
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3388
class MandosDBusService(DBusObjectWithObjectManager):
2313
3389
"""A D-Bus proxy object"""
3390
2314
3391
def __init__(self):
2315
3392
dbus.service.Object.__init__(self, bus, "/")
3393
2316
3394
_interface = "se.recompile.Mandos"
2317
3395
2318
3396
@dbus.service.signal(_interface, signature="o")
2319
3397
def ClientAdded(self, objpath):
2320
3398
"D-Bus signal"
2321
3399
pass
2322
3400
2323
3401
@dbus.service.signal(_interface, signature="ss")
2324
def ClientNotFound(self, fingerprint, address):
3402
def ClientNotFound(self, key_id, address):
2325
3403
"D-Bus signal"
2326
3404
pass
2327
3405
3406
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3407
"true"})
2328
3408
@dbus.service.signal(_interface, signature="os")
2329
3409
def ClientRemoved(self, objpath, name):
2330
3410
"D-Bus signal"
2331
3411
pass
2332
3412
3413
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3414
"true"})
2333
3415
@dbus.service.method(_interface, out_signature="ao")
2334
3416
def GetAllClients(self):
2335
3417
"D-Bus method"
2336
return dbus.Array(c.dbus_object_path
2337
for c in
2338
tcp_server.clients.itervalues())
2339
3418
return dbus.Array(c.dbus_object_path for c in
3419
tcp_server.clients.values())
3420
3421
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3422
"true"})
2340
3423
@dbus.service.method(_interface,
2341
3424
out_signature="a{oa{sv}}")
2342
3425
def GetAllClientsWithProperties(self):
2343
3426
"D-Bus method"
2344
3427
return dbus.Dictionary(
2345
((c.dbus_object_path, c.GetAll(""))
2346
for c in tcp_server.clients.itervalues()),
3428
{c.dbus_object_path: c.GetAll(
3429
"se.recompile.Mandos.Client")
3430
for c in tcp_server.clients.values()},
2347
3431
signature="oa{sv}")
2348
3432
2349
3433
@dbus.service.method(_interface, in_signature="o")
2350
3434
def RemoveClient(self, object_path):
2351
3435
"D-Bus method"
2352
for c in tcp_server.clients.itervalues():
3436
for c in tcp_server.clients.values():
2353
3437
if c.dbus_object_path == object_path:
2354
3438
del tcp_server.clients[c.name]
2355
3439
c.remove_from_connection()
2356
# Don't signal anything except ClientRemoved
3440
# Don't signal the disabling
2357
3441
c.disable(quiet=True)
2358
# Emit D-Bus signal
2359
self.ClientRemoved(object_path, c.name)
3442
# Emit D-Bus signal for removal
3443
self.client_removed_signal(c)
2360
3444
return
2361
3445
raise KeyError(object_path)
2362
3446
2363
3447
del _interface
2364
2365
class MandosDBusServiceTransitional(MandosDBusService):
2366
__metaclass__ = AlternateDBusNamesMetaclass
2367
mandos_dbus_service = MandosDBusServiceTransitional()
2368
3448
3449
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3450
out_signature="a{oa{sa{sv}}}")
3451
def GetManagedObjects(self):
3452
"""D-Bus method"""
3453
return dbus.Dictionary(
3454
{client.dbus_object_path:
3455
dbus.Dictionary(
3456
{interface: client.GetAll(interface)
3457
for interface in
3458
client._get_all_interface_names()})
3459
for client in tcp_server.clients.values()})
3460
3461
def client_added_signal(self, client):
3462
"""Send the new standard signal and the old signal"""
3463
if use_dbus:
3464
# New standard signal
3465
self.InterfacesAdded(
3466
client.dbus_object_path,
3467
dbus.Dictionary(
3468
{interface: client.GetAll(interface)
3469
for interface in
3470
client._get_all_interface_names()}))
3471
# Old signal
3472
self.ClientAdded(client.dbus_object_path)
3473
3474
def client_removed_signal(self, client):
3475
"""Send the new standard signal and the old signal"""
3476
if use_dbus:
3477
# New standard signal
3478
self.InterfacesRemoved(
3479
client.dbus_object_path,
3480
client._get_all_interface_names())
3481
# Old signal
3482
self.ClientRemoved(client.dbus_object_path,
3483
client.name)
3484
3485
mandos_dbus_service = MandosDBusService()
3486
3487
# Save modules to variables to exempt the modules from being
3488
# unloaded before the function registered with atexit() is run.
3489
mp = multiprocessing
3490
wn = wnull
3491
2369
3492
def cleanup():
2370
3493
"Cleanup function; run on exit"
2371
service.cleanup()
2372
2373
multiprocessing.active_children()
3494
if zeroconf:
3495
service.cleanup()
3496
3497
mp.active_children()
3498
wn.close()
2374
3499
if not (tcp_server.clients or client_settings):
2375
3500
return
2376
3501
2377
3502
# Store client before exiting. Secrets are encrypted with key
2378
3503
# based on what config file has. If config file is
2379
3504
# removed/edited, old secret will thus be unrecovable.
2380
3505
clients = {}
2381
3506
with PGPEngine() as pgp:
2382
for client in tcp_server.clients.itervalues():
3507
for client in tcp_server.clients.values():
2383
3508
key = client_settings[client.name]["secret"]
2384
3509
client.encrypted_secret = pgp.encrypt(client.secret,
2385
3510
key)
2386
3511
client_dict = {}
2387
3512
2388
3513
# A list of attributes that can not be pickled
2389
3514
# + secret.
2390
exclude = set(("bus", "changedstate", "secret",
2391
"checker"))
2392
for name, typ in (inspect.getmembers
2393
(dbus.service.Object)):
3515
exclude = {"bus", "changedstate", "secret",
3516
"checker", "server_settings"}
3517
for name, typ in inspect.getmembers(dbus.service
3518
.Object):
2394
3519
exclude.add(name)
2395
3520
2396
3521
client_dict["encrypted_secret"] = (client
2397
3522
.encrypted_secret)
2398
3523
for attr in client.client_structure:
2399
3524
if attr not in exclude:
2400
3525
client_dict[attr] = getattr(client, attr)
2401
3526
2402
3527
clients[client.name] = client_dict
2403
3528
del client_settings[client.name]["secret"]
2404
3529
2405
3530
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)
3531
with tempfile.NamedTemporaryFile(
3532
mode='wb',
3533
suffix=".pickle",
3534
prefix='clients-',
3535
dir=os.path.dirname(stored_state_path),
3536
delete=False) as stored_state:
3537
pickle.dump((clients, client_settings), stored_state,
3538
protocol=2)
3539
tempname = stored_state.name
2412
3540
os.rename(tempname, stored_state_path)
2413
3541
except (IOError, OSError) as e:
2414
logger.warning("Could not save persistent state: {0}"
2415
.format(e))
2416
3542
if not debug:
2417
3543
try:
2418
3544
os.remove(tempname)
2419
3545
except NameError:
2420
3546
pass
2421
if e.errno not in set((errno.ENOENT, errno.EACCES,
2422
errno.EEXIST)):
2423
raise e
2424
3547
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3548
logger.warning("Could not save persistent state: {}"
3549
.format(os.strerror(e.errno)))
3550
else:
3551
logger.warning("Could not save persistent state:",
3552
exc_info=e)
3553
raise
3554
2425
3555
# Delete all clients, and settings from config
2426
3556
while tcp_server.clients:
2427
3557
name, client = tcp_server.clients.popitem()
2428
3558
if use_dbus:
2429
3559
client.remove_from_connection()
2430
# Don't signal anything except ClientRemoved
3560
# Don't signal the disabling
2431
3561
client.disable(quiet=True)
3562
# Emit D-Bus signal for removal
2432
3563
if use_dbus:
2433
# Emit D-Bus signal
2434
mandos_dbus_service.ClientRemoved(client
2435
.dbus_object_path,
2436
client.name)
3564
mandos_dbus_service.client_removed_signal(client)
2437
3565
client_settings.clear()
2438
3566
2439
3567
atexit.register(cleanup)
2440
2441
for client in tcp_server.clients.itervalues():
3568
3569
for client in tcp_server.clients.values():
2442
3570
if use_dbus:
2443
# Emit D-Bus signal
2444
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3571
# Emit D-Bus signal for adding
3572
mandos_dbus_service.client_added_signal(client)
2445
3573
# Need to initiate checking of clients
2446
3574
if client.enabled:
2447
3575
client.init_checker()
2448
3576
2449
3577
tcp_server.enable()
2450
3578
tcp_server.server_activate()
2451
3579
2452
3580
# Find out what port we got
2453
service.port = tcp_server.socket.getsockname()[1]
3581
if zeroconf:
3582
service.port = tcp_server.socket.getsockname()[1]
2454
3583
if use_ipv6:
2455
3584
logger.info("Now listening on address %r, port %d,"
2456
" flowinfo %d, scope_id %d"
2457
% tcp_server.socket.getsockname())
3585
" flowinfo %d, scope_id %d",
3586
*tcp_server.socket.getsockname())
2458
3587
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
3588
logger.info("Now listening on address %r, port %d",
3589
*tcp_server.socket.getsockname())
3590
3591
# service.interface = tcp_server.socket.getsockname()[3]
3592
2464
3593
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
3594
if zeroconf:
3595
# From the Avahi example code
3596
try:
3597
service.activate()
3598
except dbus.exceptions.DBusException as error:
3599
logger.critical("D-Bus Exception", exc_info=error)
3600
cleanup()
3601
sys.exit(1)
3602
# End of Avahi example code
3603
3604
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3605
lambda *args, **kwargs:
3606
(tcp_server.handle_request
3607
(*args[2:], **kwargs) or True))
3608
2479
3609
logger.debug("Starting main loop")
2480
3610
main_loop.run()
2481
3611
except AvahiError as error:
2482
logger.critical("AvahiError: %s", error)
3612
logger.critical("Avahi Error", exc_info=error)
2483
3613
cleanup()
2484
3614
sys.exit(1)
2485
3615
except KeyboardInterrupt:
2490
3620
# Must run before the D-Bus bus name gets deregistered
2491
3621
cleanup()
2492
3622
3623
2493
3624
if __name__ == '__main__':
2494
3625
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0