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- Committer: Teddy Hogeborn
- Date: 2019-06-06 19:21:43 UTC
- Revision ID: teddy@recompile.se-20190606192143-pcmqbj98zmnmpgfp
.bzrignore: Add mandos-client-iprouteadddel and .tramp_history
* .bzrignore (plugin-helpers/mandos-client-iprouteadddel): Add.
(.tramp_history): - '' -
* .bzrignore (plugin-helpers/mandos-client-iprouteadddel): Add.
(.tramp_history): - '' -
- files added:
- bugs.xml
- debian/upstream
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
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2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
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# Mandos server - give out binary blobs to connecting clients.
5
#
5
#
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# This program is partly derived from an example program for an Avahi
7
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# service publisher, downloaded from
8
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# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
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# 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
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# Contact the authors at <mandos@recompile.se>.
32
#
33
#
33
34
34
35
from __future__ import (division, absolute_import, print_function,
35
36
unicode_literals)
36
37
37
import SocketServer as socketserver
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
38
47
import socket
39
48
import argparse
40
49
import datetime
41
50
import errno
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
49
55
import sys
50
56
import re
51
57
import os
60
66
import struct
61
67
import fcntl
62
68
import functools
63
import cPickle as pickle
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
64
73
import multiprocessing
65
74
import types
66
75
import binascii
67
76
import tempfile
77
import itertools
78
import collections
79
import codecs
68
80
69
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import dbus
70
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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 = "1.8.4"
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
113
def initlogger(level=logging.WARNING):
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
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155
def initlogger(debug, level=logging.WARNING):
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156
"""init logger and add loglevel"""
115
157
158
global syslogger
159
syslogger = (logging.handlers.SysLogHandler(
160
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
161
address="/dev/log"))
116
162
syslogger.setFormatter(logging.Formatter
117
163
('Mandos [%(process)d]: %(levelname)s:'
118
164
' %(message)s'))
119
165
logger.addHandler(syslogger)
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121
console = logging.StreamHandler()
122
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
123
' [%(process)d]:'
124
' %(levelname)s:'
125
' %(message)s'))
126
logger.addHandler(console)
166
167
if debug:
168
console = logging.StreamHandler()
169
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
170
' [%(process)d]:'
171
' %(levelname)s:'
172
' %(message)s'))
173
logger.addHandler(console)
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logger.setLevel(level)
128
175
129
176
134
181
135
182
class PGPEngine(object):
136
183
"""A simple class for OpenPGP symmetric encryption & decryption"""
184
137
185
def __init__(self):
138
self.gnupg = GnuPGInterface.GnuPG()
139
186
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
140
self.gnupg = GnuPGInterface.GnuPG()
141
self.gnupg.options.meta_interactive = False
142
self.gnupg.options.homedir = self.tempdir
143
self.gnupg.options.extra_args.extend(['--force-mdc',
144
'--quiet'])
145
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
146
206
def __enter__(self):
147
207
return self
148
149
def __exit__ (self, exc_type, exc_value, traceback):
208
209
def __exit__(self, exc_type, exc_value, traceback):
150
210
self._cleanup()
151
211
return False
152
212
153
213
def __del__(self):
154
214
self._cleanup()
155
215
156
216
def _cleanup(self):
157
217
if self.tempdir is not None:
158
218
# Delete contents of tempdir
159
219
for root, dirs, files in os.walk(self.tempdir,
160
topdown = False):
220
topdown=False):
161
221
for filename in files:
162
222
os.remove(os.path.join(root, filename))
163
223
for dirname in dirs:
165
225
# Remove tempdir
166
226
os.rmdir(self.tempdir)
167
227
self.tempdir = None
168
228
169
229
def password_encode(self, password):
170
230
# Passphrase can not be empty and can not contain newlines or
171
231
# NUL bytes. So we prefix it and hex encode it.
172
return b"mandos" + binascii.hexlify(password)
173
232
encoded = b"mandos" + binascii.hexlify(password)
233
if len(encoded) > 2048:
234
# GnuPG can't handle long passwords, so encode differently
235
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
236
.replace(b"\n", b"\\n")
237
.replace(b"\0", b"\\x00"))
238
return encoded
239
174
240
def encrypt(self, data, password):
175
self.gnupg.passphrase = self.password_encode(password)
176
with open(os.devnull) as devnull:
177
try:
178
proc = self.gnupg.run(['--symmetric'],
179
create_fhs=['stdin', 'stdout'],
180
attach_fhs={'stderr': devnull})
181
with contextlib.closing(proc.handles['stdin']) as f:
182
f.write(data)
183
with contextlib.closing(proc.handles['stdout']) as f:
184
ciphertext = f.read()
185
proc.wait()
186
except IOError as e:
187
raise PGPError(e)
188
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)
189
256
return ciphertext
190
257
191
258
def decrypt(self, data, password):
192
self.gnupg.passphrase = self.password_encode(password)
193
with open(os.devnull) as devnull:
194
try:
195
proc = self.gnupg.run(['--decrypt'],
196
create_fhs=['stdin', 'stdout'],
197
attach_fhs={'stderr': devnull})
198
with contextlib.closing(proc.handles['stdin'] ) as f:
199
f.write(data)
200
with contextlib.closing(proc.handles['stdout']) as f:
201
decrypted_plaintext = f.read()
202
proc.wait()
203
except IOError as e:
204
raise PGPError(e)
205
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)
206
274
return decrypted_plaintext
207
275
208
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
IF_UNSPEC = -1 # avahi-common/address.h
281
PROTO_UNSPEC = -1 # avahi-common/address.h
282
PROTO_INET = 0 # avahi-common/address.h
283
PROTO_INET6 = 1 # avahi-common/address.h
284
DBUS_NAME = "org.freedesktop.Avahi"
285
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
286
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
287
DBUS_PATH_SERVER = "/"
288
289
@staticmethod
290
def string_array_to_txt_array(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
209
302
210
303
class AvahiError(Exception):
211
304
def __init__(self, value, *args, **kwargs):
212
305
self.value = value
213
super(AvahiError, self).__init__(value, *args, **kwargs)
214
def __unicode__(self):
215
return unicode(repr(self.value))
306
return super(AvahiError, self).__init__(value, *args,
307
**kwargs)
308
216
309
217
310
class AvahiServiceError(AvahiError):
218
311
pass
219
312
313
220
314
class AvahiGroupError(AvahiError):
221
315
pass
222
316
223
317
224
318
class AvahiService(object):
225
319
"""An Avahi (Zeroconf) service.
226
320
227
321
Attributes:
228
322
interface: integer; avahi.IF_UNSPEC or an interface index.
229
323
Used to optionally bind to the specified interface.
230
324
name: string; Example: 'Mandos'
231
325
type: string; Example: '_mandos._tcp'.
232
See <http://www.dns-sd.org/ServiceTypes.html>
326
See <https://www.iana.org/assignments/service-names-port-numbers>
233
327
port: integer; what port to announce
234
328
TXT: list of strings; TXT record for the service
235
329
domain: string; Domain to publish on, default to .local if empty.
241
335
server: D-Bus Server
242
336
bus: dbus.SystemBus()
243
337
"""
244
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
245
servicetype = None, port = None, TXT = None,
246
domain = "", host = "", max_renames = 32768,
247
protocol = avahi.PROTO_UNSPEC, bus = None):
338
339
def __init__(self,
340
interface=avahi.IF_UNSPEC,
341
name=None,
342
servicetype=None,
343
port=None,
344
TXT=None,
345
domain="",
346
host="",
347
max_renames=32768,
348
protocol=avahi.PROTO_UNSPEC,
349
bus=None):
248
350
self.interface = interface
249
351
self.name = name
250
352
self.type = servicetype
259
361
self.server = None
260
362
self.bus = bus
261
363
self.entry_group_state_changed_match = None
262
def rename(self):
364
365
def rename(self, remove=True):
263
366
"""Derived from the Avahi example code"""
264
367
if self.rename_count >= self.max_renames:
265
368
logger.critical("No suitable Zeroconf service name found"
266
369
" after %i retries, exiting.",
267
370
self.rename_count)
268
371
raise AvahiServiceError("Too many renames")
269
self.name = unicode(self.server
270
.GetAlternativeServiceName(self.name))
372
self.name = str(
373
self.server.GetAlternativeServiceName(self.name))
374
self.rename_count += 1
271
375
logger.info("Changing Zeroconf service name to %r ...",
272
376
self.name)
273
self.remove()
377
if remove:
378
self.remove()
274
379
try:
275
380
self.add()
276
381
except dbus.exceptions.DBusException as error:
277
logger.critical("DBusException: %s", error)
278
self.cleanup()
279
os._exit(1)
280
self.rename_count += 1
382
if (error.get_dbus_name()
383
== "org.freedesktop.Avahi.CollisionError"):
384
logger.info("Local Zeroconf service name collision.")
385
return self.rename(remove=False)
386
else:
387
logger.critical("D-Bus Exception", exc_info=error)
388
self.cleanup()
389
os._exit(1)
390
281
391
def remove(self):
282
392
"""Derived from the Avahi example code"""
283
393
if self.entry_group_state_changed_match is not None:
285
395
self.entry_group_state_changed_match = None
286
396
if self.group is not None:
287
397
self.group.Reset()
398
288
399
def add(self):
289
400
"""Derived from the Avahi example code"""
290
401
self.remove()
307
418
dbus.UInt16(self.port),
308
419
avahi.string_array_to_txt_array(self.TXT))
309
420
self.group.Commit()
421
310
422
def entry_group_state_changed(self, state, error):
311
423
"""Derived from the Avahi example code"""
312
424
logger.debug("Avahi entry group state change: %i", state)
313
425
314
426
if state == avahi.ENTRY_GROUP_ESTABLISHED:
315
427
logger.debug("Zeroconf service established.")
316
428
elif state == avahi.ENTRY_GROUP_COLLISION:
318
430
self.rename()
319
431
elif state == avahi.ENTRY_GROUP_FAILURE:
320
432
logger.critical("Avahi: Error in group state changed %s",
321
unicode(error))
322
raise AvahiGroupError("State changed: %s"
323
% unicode(error))
433
str(error))
434
raise AvahiGroupError("State changed: {!s}".format(error))
435
324
436
def cleanup(self):
325
437
"""Derived from the Avahi example code"""
326
438
if self.group is not None:
331
443
pass
332
444
self.group = None
333
445
self.remove()
446
334
447
def server_state_changed(self, state, error=None):
335
448
"""Derived from the Avahi example code"""
336
449
logger.debug("Avahi server state change: %i", state)
337
bad_states = { avahi.SERVER_INVALID:
338
"Zeroconf server invalid",
339
avahi.SERVER_REGISTERING: None,
340
avahi.SERVER_COLLISION:
341
"Zeroconf server name collision",
342
avahi.SERVER_FAILURE:
343
"Zeroconf server failure" }
450
bad_states = {
451
avahi.SERVER_INVALID: "Zeroconf server invalid",
452
avahi.SERVER_REGISTERING: None,
453
avahi.SERVER_COLLISION: "Zeroconf server name collision",
454
avahi.SERVER_FAILURE: "Zeroconf server failure",
455
}
344
456
if state in bad_states:
345
457
if bad_states[state] is not None:
346
458
if error is None:
349
461
logger.error(bad_states[state] + ": %r", error)
350
462
self.cleanup()
351
463
elif state == avahi.SERVER_RUNNING:
352
self.add()
464
try:
465
self.add()
466
except dbus.exceptions.DBusException as error:
467
if (error.get_dbus_name()
468
== "org.freedesktop.Avahi.CollisionError"):
469
logger.info("Local Zeroconf service name"
470
" collision.")
471
return self.rename(remove=False)
472
else:
473
logger.critical("D-Bus Exception", exc_info=error)
474
self.cleanup()
475
os._exit(1)
353
476
else:
354
477
if error is None:
355
478
logger.debug("Unknown state: %r", state)
356
479
else:
357
480
logger.debug("Unknown state: %r: %r", state, error)
481
358
482
def activate(self):
359
483
"""Derived from the Avahi example code"""
360
484
if self.server is None:
364
488
follow_name_owner_changes=True),
365
489
avahi.DBUS_INTERFACE_SERVER)
366
490
self.server.connect_to_signal("StateChanged",
367
self.server_state_changed)
491
self.server_state_changed)
368
492
self.server_state_changed(self.server.GetState())
369
493
494
370
495
class AvahiServiceToSyslog(AvahiService):
371
def rename(self):
496
def rename(self, *args, **kwargs):
372
497
"""Add the new name to the syslog messages"""
373
ret = AvahiService.rename(self)
374
syslogger.setFormatter(logging.Formatter
375
('Mandos (%s) [%%(process)d]:'
376
' %%(levelname)s: %%(message)s'
377
% self.name))
498
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
499
syslogger.setFormatter(logging.Formatter(
500
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
501
.format(self.name)))
378
502
return ret
379
503
380
def timedelta_to_milliseconds(td):
381
"Convert a datetime.timedelta() to milliseconds"
382
return ((td.days * 24 * 60 * 60 * 1000)
383
+ (td.seconds * 1000)
384
+ (td.microseconds // 1000))
385
504
505
# Pretend that we have a GnuTLS module
506
class gnutls(object):
507
"""This isn't so much a class as it is a module-like namespace."""
508
509
library = ctypes.util.find_library("gnutls")
510
if library is None:
511
library = ctypes.util.find_library("gnutls-deb0")
512
_library = ctypes.cdll.LoadLibrary(library)
513
del library
514
515
# Unless otherwise indicated, the constants and types below are
516
# all from the gnutls/gnutls.h C header file.
517
518
# Constants
519
E_SUCCESS = 0
520
E_INTERRUPTED = -52
521
E_AGAIN = -28
522
CRT_OPENPGP = 2
523
CRT_RAWPK = 3
524
CLIENT = 2
525
SHUT_RDWR = 0
526
CRD_CERTIFICATE = 1
527
E_NO_CERTIFICATE_FOUND = -49
528
X509_FMT_DER = 0
529
NO_TICKETS = 1<<10
530
ENABLE_RAWPK = 1<<18
531
CTYPE_PEERS = 3
532
KEYID_USE_SHA256 = 1 # gnutls/x509.h
533
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
534
535
# Types
536
class session_int(ctypes.Structure):
537
_fields_ = []
538
session_t = ctypes.POINTER(session_int)
539
540
class certificate_credentials_st(ctypes.Structure):
541
_fields_ = []
542
certificate_credentials_t = ctypes.POINTER(
543
certificate_credentials_st)
544
certificate_type_t = ctypes.c_int
545
546
class datum_t(ctypes.Structure):
547
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
548
('size', ctypes.c_uint)]
549
550
class openpgp_crt_int(ctypes.Structure):
551
_fields_ = []
552
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
553
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
554
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
555
credentials_type_t = ctypes.c_int
556
transport_ptr_t = ctypes.c_void_p
557
close_request_t = ctypes.c_int
558
559
# Exceptions
560
class Error(Exception):
561
def __init__(self, message=None, code=None, args=()):
562
# Default usage is by a message string, but if a return
563
# code is passed, convert it to a string with
564
# gnutls.strerror()
565
self.code = code
566
if message is None and code is not None:
567
message = gnutls.strerror(code)
568
return super(gnutls.Error, self).__init__(
569
message, *args)
570
571
class CertificateSecurityError(Error):
572
pass
573
574
# Classes
575
class Credentials(object):
576
def __init__(self):
577
self._c_object = gnutls.certificate_credentials_t()
578
gnutls.certificate_allocate_credentials(
579
ctypes.byref(self._c_object))
580
self.type = gnutls.CRD_CERTIFICATE
581
582
def __del__(self):
583
gnutls.certificate_free_credentials(self._c_object)
584
585
class ClientSession(object):
586
def __init__(self, socket, credentials=None):
587
self._c_object = gnutls.session_t()
588
gnutls_flags = gnutls.CLIENT
589
if gnutls.check_version("3.5.6"):
590
gnutls_flags |= gnutls.NO_TICKETS
591
if gnutls.has_rawpk:
592
gnutls_flags |= gnutls.ENABLE_RAWPK
593
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
594
del gnutls_flags
595
gnutls.set_default_priority(self._c_object)
596
gnutls.transport_set_ptr(self._c_object, socket.fileno())
597
gnutls.handshake_set_private_extensions(self._c_object,
598
True)
599
self.socket = socket
600
if credentials is None:
601
credentials = gnutls.Credentials()
602
gnutls.credentials_set(self._c_object, credentials.type,
603
ctypes.cast(credentials._c_object,
604
ctypes.c_void_p))
605
self.credentials = credentials
606
607
def __del__(self):
608
gnutls.deinit(self._c_object)
609
610
def handshake(self):
611
return gnutls.handshake(self._c_object)
612
613
def send(self, data):
614
data = bytes(data)
615
data_len = len(data)
616
while data_len > 0:
617
data_len -= gnutls.record_send(self._c_object,
618
data[-data_len:],
619
data_len)
620
621
def bye(self):
622
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
623
624
# Error handling functions
625
def _error_code(result):
626
"""A function to raise exceptions on errors, suitable
627
for the 'restype' attribute on ctypes functions"""
628
if result >= 0:
629
return result
630
if result == gnutls.E_NO_CERTIFICATE_FOUND:
631
raise gnutls.CertificateSecurityError(code=result)
632
raise gnutls.Error(code=result)
633
634
def _retry_on_error(result, func, arguments):
635
"""A function to retry on some errors, suitable
636
for the 'errcheck' attribute on ctypes functions"""
637
while result < 0:
638
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
639
return _error_code(result)
640
result = func(*arguments)
641
return result
642
643
# Unless otherwise indicated, the function declarations below are
644
# all from the gnutls/gnutls.h C header file.
645
646
# Functions
647
priority_set_direct = _library.gnutls_priority_set_direct
648
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
649
ctypes.POINTER(ctypes.c_char_p)]
650
priority_set_direct.restype = _error_code
651
652
init = _library.gnutls_init
653
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
654
init.restype = _error_code
655
656
set_default_priority = _library.gnutls_set_default_priority
657
set_default_priority.argtypes = [session_t]
658
set_default_priority.restype = _error_code
659
660
record_send = _library.gnutls_record_send
661
record_send.argtypes = [session_t, ctypes.c_void_p,
662
ctypes.c_size_t]
663
record_send.restype = ctypes.c_ssize_t
664
record_send.errcheck = _retry_on_error
665
666
certificate_allocate_credentials = (
667
_library.gnutls_certificate_allocate_credentials)
668
certificate_allocate_credentials.argtypes = [
669
ctypes.POINTER(certificate_credentials_t)]
670
certificate_allocate_credentials.restype = _error_code
671
672
certificate_free_credentials = (
673
_library.gnutls_certificate_free_credentials)
674
certificate_free_credentials.argtypes = [
675
certificate_credentials_t]
676
certificate_free_credentials.restype = None
677
678
handshake_set_private_extensions = (
679
_library.gnutls_handshake_set_private_extensions)
680
handshake_set_private_extensions.argtypes = [session_t,
681
ctypes.c_int]
682
handshake_set_private_extensions.restype = None
683
684
credentials_set = _library.gnutls_credentials_set
685
credentials_set.argtypes = [session_t, credentials_type_t,
686
ctypes.c_void_p]
687
credentials_set.restype = _error_code
688
689
strerror = _library.gnutls_strerror
690
strerror.argtypes = [ctypes.c_int]
691
strerror.restype = ctypes.c_char_p
692
693
certificate_type_get = _library.gnutls_certificate_type_get
694
certificate_type_get.argtypes = [session_t]
695
certificate_type_get.restype = _error_code
696
697
certificate_get_peers = _library.gnutls_certificate_get_peers
698
certificate_get_peers.argtypes = [session_t,
699
ctypes.POINTER(ctypes.c_uint)]
700
certificate_get_peers.restype = ctypes.POINTER(datum_t)
701
702
global_set_log_level = _library.gnutls_global_set_log_level
703
global_set_log_level.argtypes = [ctypes.c_int]
704
global_set_log_level.restype = None
705
706
global_set_log_function = _library.gnutls_global_set_log_function
707
global_set_log_function.argtypes = [log_func]
708
global_set_log_function.restype = None
709
710
deinit = _library.gnutls_deinit
711
deinit.argtypes = [session_t]
712
deinit.restype = None
713
714
handshake = _library.gnutls_handshake
715
handshake.argtypes = [session_t]
716
handshake.restype = _error_code
717
handshake.errcheck = _retry_on_error
718
719
transport_set_ptr = _library.gnutls_transport_set_ptr
720
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
721
transport_set_ptr.restype = None
722
723
bye = _library.gnutls_bye
724
bye.argtypes = [session_t, close_request_t]
725
bye.restype = _error_code
726
bye.errcheck = _retry_on_error
727
728
check_version = _library.gnutls_check_version
729
check_version.argtypes = [ctypes.c_char_p]
730
check_version.restype = ctypes.c_char_p
731
732
_need_version = b"3.3.0"
733
if check_version(_need_version) is None:
734
raise self.Error("Needs GnuTLS {} or later"
735
.format(_need_version))
736
737
_tls_rawpk_version = b"3.6.6"
738
has_rawpk = bool(check_version(_tls_rawpk_version))
739
740
if has_rawpk:
741
# Types
742
class pubkey_st(ctypes.Structure):
743
_fields = []
744
pubkey_t = ctypes.POINTER(pubkey_st)
745
746
x509_crt_fmt_t = ctypes.c_int
747
748
# All the function declarations below are from gnutls/abstract.h
749
pubkey_init = _library.gnutls_pubkey_init
750
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
751
pubkey_init.restype = _error_code
752
753
pubkey_import = _library.gnutls_pubkey_import
754
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
755
x509_crt_fmt_t]
756
pubkey_import.restype = _error_code
757
758
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
759
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
760
ctypes.POINTER(ctypes.c_ubyte),
761
ctypes.POINTER(ctypes.c_size_t)]
762
pubkey_get_key_id.restype = _error_code
763
764
pubkey_deinit = _library.gnutls_pubkey_deinit
765
pubkey_deinit.argtypes = [pubkey_t]
766
pubkey_deinit.restype = None
767
else:
768
# All the function declarations below are from gnutls/openpgp.h
769
770
openpgp_crt_init = _library.gnutls_openpgp_crt_init
771
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
772
openpgp_crt_init.restype = _error_code
773
774
openpgp_crt_import = _library.gnutls_openpgp_crt_import
775
openpgp_crt_import.argtypes = [openpgp_crt_t,
776
ctypes.POINTER(datum_t),
777
openpgp_crt_fmt_t]
778
openpgp_crt_import.restype = _error_code
779
780
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
781
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
782
ctypes.POINTER(ctypes.c_uint)]
783
openpgp_crt_verify_self.restype = _error_code
784
785
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
786
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
787
openpgp_crt_deinit.restype = None
788
789
openpgp_crt_get_fingerprint = (
790
_library.gnutls_openpgp_crt_get_fingerprint)
791
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
792
ctypes.c_void_p,
793
ctypes.POINTER(
794
ctypes.c_size_t)]
795
openpgp_crt_get_fingerprint.restype = _error_code
796
797
if check_version("3.6.4"):
798
certificate_type_get2 = _library.gnutls_certificate_type_get2
799
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
800
certificate_type_get2.restype = _error_code
801
802
# Remove non-public functions
803
del _error_code, _retry_on_error
804
805
806
def call_pipe(connection, # : multiprocessing.Connection
807
func, *args, **kwargs):
808
"""This function is meant to be called by multiprocessing.Process
809
810
This function runs func(*args, **kwargs), and writes the resulting
811
return value on the provided multiprocessing.Connection.
812
"""
813
connection.send(func(*args, **kwargs))
814
connection.close()
815
816
386
817
class Client(object):
387
818
"""A representation of a client host served by this server.
388
819
389
820
Attributes:
390
821
approved: bool(); 'None' if not yet approved/disapproved
391
822
approval_delay: datetime.timedelta(); Time to wait for approval
393
824
checker: subprocess.Popen(); a running checker process used
394
825
to see if the client lives.
395
826
'None' if no process is running.
396
checker_callback_tag: a gobject event source tag, or None
827
checker_callback_tag: a GLib event source tag, or None
397
828
checker_command: string; External command which is run to check
398
829
if client lives. %() expansions are done at
399
830
runtime with vars(self) as dict, so that for
400
831
instance %(name)s can be used in the command.
401
checker_initiator_tag: a gobject event source tag, or None
832
checker_initiator_tag: a GLib event source tag, or None
402
833
created: datetime.datetime(); (UTC) object creation
403
834
client_structure: Object describing what attributes a client has
404
835
and is used for storing the client at exit
405
836
current_checker_command: string; current running checker_command
406
disable_initiator_tag: a gobject event source tag, or None
837
disable_initiator_tag: a GLib event source tag, or None
407
838
enabled: bool()
408
839
fingerprint: string (40 or 32 hexadecimal digits); used to
409
uniquely identify the client
840
uniquely identify an OpenPGP client
841
key_id: string (64 hexadecimal digits); used to uniquely identify
842
a client using raw public keys
410
843
host: string; available for use by the checker command
411
844
interval: datetime.timedelta(); How often to start a new checker
412
845
last_approval_request: datetime.datetime(); (UTC) or None
413
846
last_checked_ok: datetime.datetime(); (UTC) or None
414
847
last_checker_status: integer between 0 and 255 reflecting exit
415
848
status of last checker. -1 reflects crashed
416
checker, or None.
849
checker, -2 means no checker completed yet.
850
last_checker_signal: The signal which killed the last checker, if
851
last_checker_status is -1
417
852
last_enabled: datetime.datetime(); (UTC) or None
418
853
name: string; from the config file, used in log messages and
419
854
D-Bus identifiers
420
855
secret: bytestring; sent verbatim (over TLS) to client
421
856
timeout: datetime.timedelta(); How long from last_checked_ok
422
857
until this client is disabled
423
extended_timeout: extra long timeout when password has been sent
858
extended_timeout: extra long timeout when secret has been sent
424
859
runtime_expansions: Allowed attributes for runtime expansion.
425
860
expires: datetime.datetime(); time (UTC) when a client will be
426
861
disabled, or None
862
server_settings: The server_settings dict from main()
427
863
"""
428
864
429
865
runtime_expansions = ("approval_delay", "approval_duration",
430
"created", "enabled", "fingerprint",
431
"host", "interval", "last_checked_ok",
866
"created", "enabled", "expires", "key_id",
867
"fingerprint", "host", "interval",
868
"last_approval_request", "last_checked_ok",
432
869
"last_enabled", "name", "timeout")
433
client_defaults = { "timeout": "5m",
434
"extended_timeout": "15m",
435
"interval": "2m",
436
"checker": "fping -q -- %%(host)s",
437
"host": "",
438
"approval_delay": "0s",
439
"approval_duration": "1s",
440
"approved_by_default": "True",
441
"enabled": "True",
442
}
443
444
def timeout_milliseconds(self):
445
"Return the 'timeout' attribute in milliseconds"
446
return timedelta_to_milliseconds(self.timeout)
447
448
def extended_timeout_milliseconds(self):
449
"Return the 'extended_timeout' attribute in milliseconds"
450
return timedelta_to_milliseconds(self.extended_timeout)
451
452
def interval_milliseconds(self):
453
"Return the 'interval' attribute in milliseconds"
454
return timedelta_to_milliseconds(self.interval)
455
456
def approval_delay_milliseconds(self):
457
return timedelta_to_milliseconds(self.approval_delay)
870
client_defaults = {
871
"timeout": "PT5M",
872
"extended_timeout": "PT15M",
873
"interval": "PT2M",
874
"checker": "fping -q -- %%(host)s",
875
"host": "",
876
"approval_delay": "PT0S",
877
"approval_duration": "PT1S",
878
"approved_by_default": "True",
879
"enabled": "True",
880
}
458
881
459
882
@staticmethod
460
883
def config_parser(config):
461
""" Construct a new dict of client settings of this form:
884
"""Construct a new dict of client settings of this form:
462
885
{ client_name: {setting_name: value, ...}, ...}
463
with exceptions for any special settings as defined above"""
886
with exceptions for any special settings as defined above.
887
NOTE: Must be a pure function. Must return the same result
888
value given the same arguments.
889
"""
464
890
settings = {}
465
891
for client_name in config.sections():
466
892
section = dict(config.items(client_name))
467
893
client = settings[client_name] = {}
468
894
469
895
client["host"] = section["host"]
470
896
# Reformat values from string types to Python types
471
897
client["approved_by_default"] = config.getboolean(
472
898
client_name, "approved_by_default")
473
client["enabled"] = config.getboolean(client_name, "enabled")
474
899
client["enabled"] = config.getboolean(client_name,
900
"enabled")
901
902
# Uppercase and remove spaces from key_id and fingerprint
903
# for later comparison purposes with return value from the
904
# key_id() and fingerprint() functions
905
client["key_id"] = (section.get("key_id", "").upper()
906
.replace(" ", ""))
475
907
client["fingerprint"] = (section["fingerprint"].upper()
476
908
.replace(" ", ""))
477
909
if "secret" in section:
478
client["secret"] = section["secret"].decode("base64")
910
client["secret"] = codecs.decode(section["secret"]
911
.encode("utf-8"),
912
"base64")
479
913
elif "secfile" in section:
480
914
with open(os.path.expanduser(os.path.expandvars
481
915
(section["secfile"])),
482
916
"rb") as secfile:
483
917
client["secret"] = secfile.read()
484
918
else:
485
raise TypeError("No secret or secfile for section %s"
486
% section)
919
raise TypeError("No secret or secfile for section {}"
920
.format(section))
487
921
client["timeout"] = string_to_delta(section["timeout"])
488
922
client["extended_timeout"] = string_to_delta(
489
923
section["extended_timeout"])
495
929
client["checker_command"] = section["checker"]
496
930
client["last_approval_request"] = None
497
931
client["last_checked_ok"] = None
498
client["last_checker_status"] = None
499
if client["enabled"]:
500
client["last_enabled"] = datetime.datetime.utcnow()
501
client["expires"] = (datetime.datetime.utcnow()
502
+ client["timeout"])
503
else:
504
client["last_enabled"] = None
505
client["expires"] = None
932
client["last_checker_status"] = -2
506
933
507
934
return settings
508
509
510
def __init__(self, settings, name = None):
511
"""Note: the 'checker' key in 'config' sets the
512
'checker_command' attribute and *not* the 'checker'
513
attribute."""
935
936
def __init__(self, settings, name=None, server_settings=None):
514
937
self.name = name
938
if server_settings is None:
939
server_settings = {}
940
self.server_settings = server_settings
515
941
# adding all client settings
516
for setting, value in settings.iteritems():
942
for setting, value in settings.items():
517
943
setattr(self, setting, value)
518
944
945
if self.enabled:
946
if not hasattr(self, "last_enabled"):
947
self.last_enabled = datetime.datetime.utcnow()
948
if not hasattr(self, "expires"):
949
self.expires = (datetime.datetime.utcnow()
950
+ self.timeout)
951
else:
952
self.last_enabled = None
953
self.expires = None
954
519
955
logger.debug("Creating client %r", self.name)
520
# Uppercase and remove spaces from fingerprint for later
521
# comparison purposes with return value from the fingerprint()
522
# function
956
logger.debug(" Key ID: %s", self.key_id)
523
957
logger.debug(" Fingerprint: %s", self.fingerprint)
524
self.created = settings.get("created", datetime.datetime.utcnow())
958
self.created = settings.get("created",
959
datetime.datetime.utcnow())
525
960
526
961
# attributes specific for this server instance
527
962
self.checker = None
531
966
self.current_checker_command = None
532
967
self.approved = None
533
968
self.approvals_pending = 0
534
self.changedstate = (multiprocessing_manager
535
.Condition(multiprocessing_manager
536
.Lock()))
537
self.client_structure = [attr for attr in
538
self.__dict__.iterkeys()
969
self.changedstate = multiprocessing_manager.Condition(
970
multiprocessing_manager.Lock())
971
self.client_structure = [attr
972
for attr in self.__dict__.keys()
539
973
if not attr.startswith("_")]
540
974
self.client_structure.append("client_structure")
541
542
for name, t in inspect.getmembers(type(self),
543
lambda obj:
544
isinstance(obj,
545
property)):
975
976
for name, t in inspect.getmembers(
977
type(self), lambda obj: isinstance(obj, property)):
546
978
if not name.startswith("_"):
547
979
self.client_structure.append(name)
548
980
549
981
# Send notice to process children that client state has changed
550
982
def send_changedstate(self):
551
983
with self.changedstate:
552
984
self.changedstate.notify_all()
553
985
554
986
def enable(self):
555
987
"""Start this client's checker and timeout hooks"""
556
988
if getattr(self, "enabled", False):
557
989
# Already enabled
558
990
return
559
self.send_changedstate()
560
991
self.expires = datetime.datetime.utcnow() + self.timeout
561
992
self.enabled = True
562
993
self.last_enabled = datetime.datetime.utcnow()
563
994
self.init_checker()
564
995
self.send_changedstate()
996
565
997
def disable(self, quiet=True):
566
998
"""Disable this client."""
567
999
if not getattr(self, "enabled", False):
568
1000
return False
569
1001
if not quiet:
570
self.send_changedstate()
571
if not quiet:
572
1002
logger.info("Disabling client %s", self.name)
573
if getattr(self, "disable_initiator_tag", False):
574
gobject.source_remove(self.disable_initiator_tag)
1003
if getattr(self, "disable_initiator_tag", None) is not None:
1004
GLib.source_remove(self.disable_initiator_tag)
575
1005
self.disable_initiator_tag = None
576
1006
self.expires = None
577
if getattr(self, "checker_initiator_tag", False):
578
gobject.source_remove(self.checker_initiator_tag)
1007
if getattr(self, "checker_initiator_tag", None) is not None:
1008
GLib.source_remove(self.checker_initiator_tag)
579
1009
self.checker_initiator_tag = None
580
1010
self.stop_checker()
581
1011
self.enabled = False
582
# Do not run this again if called by a gobject.timeout_add
1012
if not quiet:
1013
self.send_changedstate()
1014
# Do not run this again if called by a GLib.timeout_add
583
1015
return False
584
1016
585
1017
def __del__(self):
586
1018
self.disable()
587
1019
588
1020
def init_checker(self):
589
1021
# Schedule a new checker to be started an 'interval' from now,
590
1022
# and every interval from then on.
591
self.checker_initiator_tag = (gobject.timeout_add
592
(self.interval_milliseconds(),
593
self.start_checker))
1023
if self.checker_initiator_tag is not None:
1024
GLib.source_remove(self.checker_initiator_tag)
1025
self.checker_initiator_tag = GLib.timeout_add(
1026
int(self.interval.total_seconds() * 1000),
1027
self.start_checker)
594
1028
# Schedule a disable() when 'timeout' has passed
595
self.disable_initiator_tag = (gobject.timeout_add
596
(self.timeout_milliseconds(),
597
self.disable))
1029
if self.disable_initiator_tag is not None:
1030
GLib.source_remove(self.disable_initiator_tag)
1031
self.disable_initiator_tag = GLib.timeout_add(
1032
int(self.timeout.total_seconds() * 1000), self.disable)
598
1033
# Also start a new checker *right now*.
599
1034
self.start_checker()
600
601
def checker_callback(self, pid, condition, command):
1035
1036
def checker_callback(self, source, condition, connection,
1037
command):
602
1038
"""The checker has completed, so take appropriate actions."""
603
1039
self.checker_callback_tag = None
604
1040
self.checker = None
605
if os.WIFEXITED(condition):
606
self.last_checker_status = os.WEXITSTATUS(condition)
1041
# Read return code from connection (see call_pipe)
1042
returncode = connection.recv()
1043
connection.close()
1044
1045
if returncode >= 0:
1046
self.last_checker_status = returncode
1047
self.last_checker_signal = None
607
1048
if self.last_checker_status == 0:
608
1049
logger.info("Checker for %(name)s succeeded",
609
1050
vars(self))
610
1051
self.checked_ok()
611
1052
else:
612
logger.info("Checker for %(name)s failed",
613
vars(self))
1053
logger.info("Checker for %(name)s failed", vars(self))
614
1054
else:
615
1055
self.last_checker_status = -1
1056
self.last_checker_signal = -returncode
616
1057
logger.warning("Checker for %(name)s crashed?",
617
1058
vars(self))
618
619
def checked_ok(self, timeout=None):
620
"""Bump up the timeout for this client.
621
622
This should only be called when the client has been seen,
623
alive and well.
624
"""
1059
return False
1060
1061
def checked_ok(self):
1062
"""Assert that the client has been seen, alive and well."""
1063
self.last_checked_ok = datetime.datetime.utcnow()
1064
self.last_checker_status = 0
1065
self.last_checker_signal = None
1066
self.bump_timeout()
1067
1068
def bump_timeout(self, timeout=None):
1069
"""Bump up the timeout for this client."""
625
1070
if timeout is None:
626
1071
timeout = self.timeout
627
self.last_checked_ok = datetime.datetime.utcnow()
628
1072
if self.disable_initiator_tag is not None:
629
gobject.source_remove(self.disable_initiator_tag)
1073
GLib.source_remove(self.disable_initiator_tag)
1074
self.disable_initiator_tag = None
630
1075
if getattr(self, "enabled", False):
631
self.disable_initiator_tag = (gobject.timeout_add
632
(timedelta_to_milliseconds
633
(timeout), self.disable))
1076
self.disable_initiator_tag = GLib.timeout_add(
1077
int(timeout.total_seconds() * 1000), self.disable)
634
1078
self.expires = datetime.datetime.utcnow() + timeout
635
1079
636
1080
def need_approval(self):
637
1081
self.last_approval_request = datetime.datetime.utcnow()
638
1082
639
1083
def start_checker(self):
640
1084
"""Start a new checker subprocess if one is not running.
641
1085
642
1086
If a checker already exists, leave it running and do
643
1087
nothing."""
644
1088
# The reason for not killing a running checker is that if we
645
# did that, then if a checker (for some reason) started
646
# running slowly and taking more than 'interval' time, the
647
# client would inevitably timeout, since no checker would get
648
# a chance to run to completion. If we instead leave running
1089
# did that, and if a checker (for some reason) started running
1090
# slowly and taking more than 'interval' time, then the client
1091
# would inevitably timeout, since no checker would get a
1092
# chance to run to completion. If we instead leave running
649
1093
# checkers alone, the checker would have to take more time
650
1094
# than 'timeout' for the client to be disabled, which is as it
651
1095
# should be.
652
653
# If a checker exists, make sure it is not a zombie
654
try:
655
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
656
except (AttributeError, OSError) as error:
657
if (isinstance(error, OSError)
658
and error.errno != errno.ECHILD):
659
raise error
660
else:
661
if pid:
662
logger.warning("Checker was a zombie")
663
gobject.source_remove(self.checker_callback_tag)
664
self.checker_callback(pid, status,
665
self.current_checker_command)
1096
1097
if self.checker is not None and not self.checker.is_alive():
1098
logger.warning("Checker was not alive; joining")
1099
self.checker.join()
1100
self.checker = None
666
1101
# Start a new checker if needed
667
1102
if self.checker is None:
1103
# Escape attributes for the shell
1104
escaped_attrs = {
1105
attr: re.escape(str(getattr(self, attr)))
1106
for attr in self.runtime_expansions}
668
1107
try:
669
# In case checker_command has exactly one % operator
670
command = self.checker_command % self.host
671
except TypeError:
672
# Escape attributes for the shell
673
escaped_attrs = dict(
674
(attr,
675
re.escape(unicode(str(getattr(self, attr, "")),
676
errors=
677
'replace')))
678
for attr in
679
self.runtime_expansions)
680
681
try:
682
command = self.checker_command % escaped_attrs
683
except TypeError as error:
684
logger.error('Could not format string "%s":'
685
' %s', self.checker_command, error)
686
return True # Try again later
1108
command = self.checker_command % escaped_attrs
1109
except TypeError as error:
1110
logger.error('Could not format string "%s"',
1111
self.checker_command,
1112
exc_info=error)
1113
return True # Try again later
687
1114
self.current_checker_command = command
688
try:
689
logger.info("Starting checker %r for %s",
690
command, self.name)
691
# We don't need to redirect stdout and stderr, since
692
# in normal mode, that is already done by daemon(),
693
# and in debug mode we don't want to. (Stdin is
694
# always replaced by /dev/null.)
695
self.checker = subprocess.Popen(command,
696
close_fds=True,
697
shell=True, cwd="/")
698
self.checker_callback_tag = (gobject.child_watch_add
699
(self.checker.pid,
700
self.checker_callback,
701
data=command))
702
# The checker may have completed before the gobject
703
# watch was added. Check for this.
704
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
705
if pid:
706
gobject.source_remove(self.checker_callback_tag)
707
self.checker_callback(pid, status, command)
708
except OSError as error:
709
logger.error("Failed to start subprocess: %s",
710
error)
711
# Re-run this periodically if run by gobject.timeout_add
1115
logger.info("Starting checker %r for %s", command,
1116
self.name)
1117
# We don't need to redirect stdout and stderr, since
1118
# in normal mode, that is already done by daemon(),
1119
# and in debug mode we don't want to. (Stdin is
1120
# always replaced by /dev/null.)
1121
# The exception is when not debugging but nevertheless
1122
# running in the foreground; use the previously
1123
# created wnull.
1124
popen_args = {"close_fds": True,
1125
"shell": True,
1126
"cwd": "/"}
1127
if (not self.server_settings["debug"]
1128
and self.server_settings["foreground"]):
1129
popen_args.update({"stdout": wnull,
1130
"stderr": wnull})
1131
pipe = multiprocessing.Pipe(duplex=False)
1132
self.checker = multiprocessing.Process(
1133
target=call_pipe,
1134
args=(pipe[1], subprocess.call, command),
1135
kwargs=popen_args)
1136
self.checker.start()
1137
self.checker_callback_tag = GLib.io_add_watch(
1138
pipe[0].fileno(), GLib.IO_IN,
1139
self.checker_callback, pipe[0], command)
1140
# Re-run this periodically if run by GLib.timeout_add
712
1141
return True
713
1142
714
1143
def stop_checker(self):
715
1144
"""Force the checker process, if any, to stop."""
716
1145
if self.checker_callback_tag:
717
gobject.source_remove(self.checker_callback_tag)
1146
GLib.source_remove(self.checker_callback_tag)
718
1147
self.checker_callback_tag = None
719
1148
if getattr(self, "checker", None) is None:
720
1149
return
721
1150
logger.debug("Stopping checker for %(name)s", vars(self))
722
try:
723
os.kill(self.checker.pid, signal.SIGTERM)
724
#time.sleep(0.5)
725
#if self.checker.poll() is None:
726
# os.kill(self.checker.pid, signal.SIGKILL)
727
except OSError as error:
728
if error.errno != errno.ESRCH: # No such process
729
raise
1151
self.checker.terminate()
730
1152
self.checker = None
731
1153
732
1154
733
def dbus_service_property(dbus_interface, signature="v",
734
access="readwrite", byte_arrays=False):
1155
def dbus_service_property(dbus_interface,
1156
signature="v",
1157
access="readwrite",
1158
byte_arrays=False):
735
1159
"""Decorators for marking methods of a DBusObjectWithProperties to
736
1160
become properties on the D-Bus.
737
1161
738
1162
The decorated method will be called with no arguments by "Get"
739
1163
and with one argument by "Set".
740
1164
741
1165
The parameters, where they are supported, are the same as
742
1166
dbus.service.method, except there is only "signature", since the
743
1167
type from Get() and the type sent to Set() is the same.
746
1170
# "Set" method, so we fail early here:
747
1171
if byte_arrays and signature != "ay":
748
1172
raise ValueError("Byte arrays not supported for non-'ay'"
749
" signature %r" % signature)
1173
" signature {!r}".format(signature))
1174
750
1175
def decorator(func):
751
1176
func._dbus_is_property = True
752
1177
func._dbus_interface = dbus_interface
755
1180
func._dbus_name = func.__name__
756
1181
if func._dbus_name.endswith("_dbus_property"):
757
1182
func._dbus_name = func._dbus_name[:-14]
758
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
759
return func
1183
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1184
return func
1185
1186
return decorator
1187
1188
1189
def dbus_interface_annotations(dbus_interface):
1190
"""Decorator for marking functions returning interface annotations
1191
1192
Usage:
1193
1194
@dbus_interface_annotations("org.example.Interface")
1195
def _foo(self): # Function name does not matter
1196
return {"org.freedesktop.DBus.Deprecated": "true",
1197
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1198
"false"}
1199
"""
1200
1201
def decorator(func):
1202
func._dbus_is_interface = True
1203
func._dbus_interface = dbus_interface
1204
func._dbus_name = dbus_interface
1205
return func
1206
1207
return decorator
1208
1209
1210
def dbus_annotations(annotations):
1211
"""Decorator to annotate D-Bus methods, signals or properties
1212
Usage:
1213
1214
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1215
"org.freedesktop.DBus.Property."
1216
"EmitsChangedSignal": "false"})
1217
@dbus_service_property("org.example.Interface", signature="b",
1218
access="r")
1219
def Property_dbus_property(self):
1220
return dbus.Boolean(False)
1221
1222
See also the DBusObjectWithAnnotations class.
1223
"""
1224
1225
def decorator(func):
1226
func._dbus_annotations = annotations
1227
return func
1228
760
1229
return decorator
761
1230
762
1231
763
1232
class DBusPropertyException(dbus.exceptions.DBusException):
764
1233
"""A base class for D-Bus property-related exceptions
765
1234
"""
766
def __unicode__(self):
767
return unicode(str(self))
1235
pass
768
1236
769
1237
770
1238
class DBusPropertyAccessException(DBusPropertyException):
779
1247
pass
780
1248
781
1249
782
class DBusObjectWithProperties(dbus.service.Object):
1250
class DBusObjectWithAnnotations(dbus.service.Object):
1251
"""A D-Bus object with annotations.
1252
1253
Classes inheriting from this can use the dbus_annotations
1254
decorator to add annotations to methods or signals.
1255
"""
1256
1257
@staticmethod
1258
def _is_dbus_thing(thing):
1259
"""Returns a function testing if an attribute is a D-Bus thing
1260
1261
If called like _is_dbus_thing("method") it returns a function
1262
suitable for use as predicate to inspect.getmembers().
1263
"""
1264
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1265
False)
1266
1267
def _get_all_dbus_things(self, thing):
1268
"""Returns a generator of (name, attribute) pairs
1269
"""
1270
return ((getattr(athing.__get__(self), "_dbus_name", name),
1271
athing.__get__(self))
1272
for cls in self.__class__.__mro__
1273
for name, athing in
1274
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1275
1276
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1277
out_signature="s",
1278
path_keyword='object_path',
1279
connection_keyword='connection')
1280
def Introspect(self, object_path, connection):
1281
"""Overloading of standard D-Bus method.
1282
1283
Inserts annotation tags on methods and signals.
1284
"""
1285
xmlstring = dbus.service.Object.Introspect(self, object_path,
1286
connection)
1287
try:
1288
document = xml.dom.minidom.parseString(xmlstring)
1289
1290
for if_tag in document.getElementsByTagName("interface"):
1291
# Add annotation tags
1292
for typ in ("method", "signal"):
1293
for tag in if_tag.getElementsByTagName(typ):
1294
annots = dict()
1295
for name, prop in (self.
1296
_get_all_dbus_things(typ)):
1297
if (name == tag.getAttribute("name")
1298
and prop._dbus_interface
1299
== if_tag.getAttribute("name")):
1300
annots.update(getattr(
1301
prop, "_dbus_annotations", {}))
1302
for name, value in annots.items():
1303
ann_tag = document.createElement(
1304
"annotation")
1305
ann_tag.setAttribute("name", name)
1306
ann_tag.setAttribute("value", value)
1307
tag.appendChild(ann_tag)
1308
# Add interface annotation tags
1309
for annotation, value in dict(
1310
itertools.chain.from_iterable(
1311
annotations().items()
1312
for name, annotations
1313
in self._get_all_dbus_things("interface")
1314
if name == if_tag.getAttribute("name")
1315
)).items():
1316
ann_tag = document.createElement("annotation")
1317
ann_tag.setAttribute("name", annotation)
1318
ann_tag.setAttribute("value", value)
1319
if_tag.appendChild(ann_tag)
1320
# Fix argument name for the Introspect method itself
1321
if (if_tag.getAttribute("name")
1322
== dbus.INTROSPECTABLE_IFACE):
1323
for cn in if_tag.getElementsByTagName("method"):
1324
if cn.getAttribute("name") == "Introspect":
1325
for arg in cn.getElementsByTagName("arg"):
1326
if (arg.getAttribute("direction")
1327
== "out"):
1328
arg.setAttribute("name",
1329
"xml_data")
1330
xmlstring = document.toxml("utf-8")
1331
document.unlink()
1332
except (AttributeError, xml.dom.DOMException,
1333
xml.parsers.expat.ExpatError) as error:
1334
logger.error("Failed to override Introspection method",
1335
exc_info=error)
1336
return xmlstring
1337
1338
1339
class DBusObjectWithProperties(DBusObjectWithAnnotations):
783
1340
"""A D-Bus object with properties.
784
1341
785
1342
Classes inheriting from this can use the dbus_service_property
786
1343
decorator to expose methods as D-Bus properties. It exposes the
787
1344
standard Get(), Set(), and GetAll() methods on the D-Bus.
788
1345
"""
789
790
@staticmethod
791
def _is_dbus_property(obj):
792
return getattr(obj, "_dbus_is_property", False)
793
794
def _get_all_dbus_properties(self):
795
"""Returns a generator of (name, attribute) pairs
796
"""
797
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
798
for cls in self.__class__.__mro__
799
for name, prop in
800
inspect.getmembers(cls, self._is_dbus_property))
801
1346
802
1347
def _get_dbus_property(self, interface_name, property_name):
803
1348
"""Returns a bound method if one exists which is a D-Bus
804
1349
property with the specified name and interface.
805
1350
"""
806
for cls in self.__class__.__mro__:
807
for name, value in (inspect.getmembers
808
(cls, self._is_dbus_property)):
1351
for cls in self.__class__.__mro__:
1352
for name, value in inspect.getmembers(
1353
cls, self._is_dbus_thing("property")):
809
1354
if (value._dbus_name == property_name
810
1355
and value._dbus_interface == interface_name):
811
1356
return value.__get__(self)
812
1357
813
1358
# No such property
814
raise DBusPropertyNotFound(self.dbus_object_path + ":"
815
+ interface_name + "."
816
+ property_name)
817
818
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1359
raise DBusPropertyNotFound("{}:{}.{}".format(
1360
self.dbus_object_path, interface_name, property_name))
1361
1362
@classmethod
1363
def _get_all_interface_names(cls):
1364
"""Get a sequence of all interfaces supported by an object"""
1365
return (name for name in set(getattr(getattr(x, attr),
1366
"_dbus_interface", None)
1367
for x in (inspect.getmro(cls))
1368
for attr in dir(x))
1369
if name is not None)
1370
1371
@dbus.service.method(dbus.PROPERTIES_IFACE,
1372
in_signature="ss",
819
1373
out_signature="v")
820
1374
def Get(self, interface_name, property_name):
821
1375
"""Standard D-Bus property Get() method, see D-Bus standard.
827
1381
if not hasattr(value, "variant_level"):
828
1382
return value
829
1383
return type(value)(value, variant_level=value.variant_level+1)
830
1384
831
1385
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
832
1386
def Set(self, interface_name, property_name, value):
833
1387
"""Standard D-Bus property Set() method, see D-Bus standard.
839
1393
# The byte_arrays option is not supported yet on
840
1394
# signatures other than "ay".
841
1395
if prop._dbus_signature != "ay":
842
raise ValueError
843
value = dbus.ByteArray(''.join(unichr(byte)
844
for byte in value))
1396
raise ValueError("Byte arrays not supported for non-"
1397
"'ay' signature {!r}"
1398
.format(prop._dbus_signature))
1399
value = dbus.ByteArray(b''.join(chr(byte)
1400
for byte in value))
845
1401
prop(value)
846
847
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1402
1403
@dbus.service.method(dbus.PROPERTIES_IFACE,
1404
in_signature="s",
848
1405
out_signature="a{sv}")
849
1406
def GetAll(self, interface_name):
850
1407
"""Standard D-Bus property GetAll() method, see D-Bus
851
1408
standard.
852
1409
853
1410
Note: Will not include properties with access="write".
854
1411
"""
855
1412
properties = {}
856
for name, prop in self._get_all_dbus_properties():
1413
for name, prop in self._get_all_dbus_things("property"):
857
1414
if (interface_name
858
1415
and interface_name != prop._dbus_interface):
859
1416
# Interface non-empty but did not match
865
1422
if not hasattr(value, "variant_level"):
866
1423
properties[name] = value
867
1424
continue
868
properties[name] = type(value)(value, variant_level=
869
value.variant_level+1)
1425
properties[name] = type(value)(
1426
value, variant_level=value.variant_level + 1)
870
1427
return dbus.Dictionary(properties, signature="sv")
871
1428
1429
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1430
def PropertiesChanged(self, interface_name, changed_properties,
1431
invalidated_properties):
1432
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1433
standard.
1434
"""
1435
pass
1436
872
1437
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
873
1438
out_signature="s",
874
1439
path_keyword='object_path',
875
1440
connection_keyword='connection')
876
1441
def Introspect(self, object_path, connection):
877
"""Standard D-Bus method, overloaded to insert property tags.
1442
"""Overloading of standard D-Bus method.
1443
1444
Inserts property tags and interface annotation tags.
878
1445
"""
879
xmlstring = dbus.service.Object.Introspect(self, object_path,
880
connection)
1446
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1447
object_path,
1448
connection)
881
1449
try:
882
1450
document = xml.dom.minidom.parseString(xmlstring)
1451
883
1452
def make_tag(document, name, prop):
884
1453
e = document.createElement("property")
885
1454
e.setAttribute("name", name)
886
1455
e.setAttribute("type", prop._dbus_signature)
887
1456
e.setAttribute("access", prop._dbus_access)
888
1457
return e
1458
889
1459
for if_tag in document.getElementsByTagName("interface"):
1460
# Add property tags
890
1461
for tag in (make_tag(document, name, prop)
891
1462
for name, prop
892
in self._get_all_dbus_properties()
1463
in self._get_all_dbus_things("property")
893
1464
if prop._dbus_interface
894
1465
== if_tag.getAttribute("name")):
895
1466
if_tag.appendChild(tag)
1467
# Add annotation tags for properties
1468
for tag in if_tag.getElementsByTagName("property"):
1469
annots = dict()
1470
for name, prop in self._get_all_dbus_things(
1471
"property"):
1472
if (name == tag.getAttribute("name")
1473
and prop._dbus_interface
1474
== if_tag.getAttribute("name")):
1475
annots.update(getattr(
1476
prop, "_dbus_annotations", {}))
1477
for name, value in annots.items():
1478
ann_tag = document.createElement(
1479
"annotation")
1480
ann_tag.setAttribute("name", name)
1481
ann_tag.setAttribute("value", value)
1482
tag.appendChild(ann_tag)
896
1483
# Add the names to the return values for the
897
1484
# "org.freedesktop.DBus.Properties" methods
898
1485
if (if_tag.getAttribute("name")
913
1500
except (AttributeError, xml.dom.DOMException,
914
1501
xml.parsers.expat.ExpatError) as error:
915
1502
logger.error("Failed to override Introspection method",
916
error)
917
return xmlstring
918
919
920
def datetime_to_dbus (dt, variant_level=0):
1503
exc_info=error)
1504
return xmlstring
1505
1506
1507
try:
1508
dbus.OBJECT_MANAGER_IFACE
1509
except AttributeError:
1510
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1511
1512
1513
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1514
"""A D-Bus object with an ObjectManager.
1515
1516
Classes inheriting from this exposes the standard
1517
GetManagedObjects call and the InterfacesAdded and
1518
InterfacesRemoved signals on the standard
1519
"org.freedesktop.DBus.ObjectManager" interface.
1520
1521
Note: No signals are sent automatically; they must be sent
1522
manually.
1523
"""
1524
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1525
out_signature="a{oa{sa{sv}}}")
1526
def GetManagedObjects(self):
1527
"""This function must be overridden"""
1528
raise NotImplementedError()
1529
1530
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1531
signature="oa{sa{sv}}")
1532
def InterfacesAdded(self, object_path, interfaces_and_properties):
1533
pass
1534
1535
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1536
def InterfacesRemoved(self, object_path, interfaces):
1537
pass
1538
1539
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1540
out_signature="s",
1541
path_keyword='object_path',
1542
connection_keyword='connection')
1543
def Introspect(self, object_path, connection):
1544
"""Overloading of standard D-Bus method.
1545
1546
Override return argument name of GetManagedObjects to be
1547
"objpath_interfaces_and_properties"
1548
"""
1549
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1550
object_path,
1551
connection)
1552
try:
1553
document = xml.dom.minidom.parseString(xmlstring)
1554
1555
for if_tag in document.getElementsByTagName("interface"):
1556
# Fix argument name for the GetManagedObjects method
1557
if (if_tag.getAttribute("name")
1558
== dbus.OBJECT_MANAGER_IFACE):
1559
for cn in if_tag.getElementsByTagName("method"):
1560
if (cn.getAttribute("name")
1561
== "GetManagedObjects"):
1562
for arg in cn.getElementsByTagName("arg"):
1563
if (arg.getAttribute("direction")
1564
== "out"):
1565
arg.setAttribute(
1566
"name",
1567
"objpath_interfaces"
1568
"_and_properties")
1569
xmlstring = document.toxml("utf-8")
1570
document.unlink()
1571
except (AttributeError, xml.dom.DOMException,
1572
xml.parsers.expat.ExpatError) as error:
1573
logger.error("Failed to override Introspection method",
1574
exc_info=error)
1575
return xmlstring
1576
1577
1578
def datetime_to_dbus(dt, variant_level=0):
921
1579
"""Convert a UTC datetime.datetime() to a D-Bus type."""
922
1580
if dt is None:
923
return dbus.String("", variant_level = variant_level)
924
return dbus.String(dt.isoformat(),
925
variant_level=variant_level)
926
927
928
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
929
.__metaclass__):
930
"""Applied to an empty subclass of a D-Bus object, this metaclass
931
will add additional D-Bus attributes matching a certain pattern.
1581
return dbus.String("", variant_level=variant_level)
1582
return dbus.String(dt.isoformat(), variant_level=variant_level)
1583
1584
1585
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1586
"""A class decorator; applied to a subclass of
1587
dbus.service.Object, it will add alternate D-Bus attributes with
1588
interface names according to the "alt_interface_names" mapping.
1589
Usage:
1590
1591
@alternate_dbus_interfaces({"org.example.Interface":
1592
"net.example.AlternateInterface"})
1593
class SampleDBusObject(dbus.service.Object):
1594
@dbus.service.method("org.example.Interface")
1595
def SampleDBusMethod():
1596
pass
1597
1598
The above "SampleDBusMethod" on "SampleDBusObject" will be
1599
reachable via two interfaces: "org.example.Interface" and
1600
"net.example.AlternateInterface", the latter of which will have
1601
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1602
"true", unless "deprecate" is passed with a False value.
1603
1604
This works for methods and signals, and also for D-Bus properties
1605
(from DBusObjectWithProperties) and interfaces (from the
1606
dbus_interface_annotations decorator).
932
1607
"""
933
def __new__(mcs, name, bases, attr):
934
# Go through all the base classes which could have D-Bus
935
# methods, signals, or properties in them
936
for base in (b for b in bases
937
if issubclass(b, dbus.service.Object)):
938
# Go though all attributes of the base class
939
for attrname, attribute in inspect.getmembers(base):
1608
1609
def wrapper(cls):
1610
for orig_interface_name, alt_interface_name in (
1611
alt_interface_names.items()):
1612
attr = {}
1613
interface_names = set()
1614
# Go though all attributes of the class
1615
for attrname, attribute in inspect.getmembers(cls):
940
1616
# Ignore non-D-Bus attributes, and D-Bus attributes
941
1617
# with the wrong interface name
942
1618
if (not hasattr(attribute, "_dbus_interface")
943
or not attribute._dbus_interface
944
.startswith("se.recompile.Mandos")):
1619
or not attribute._dbus_interface.startswith(
1620
orig_interface_name)):
945
1621
continue
946
1622
# Create an alternate D-Bus interface name based on
947
1623
# the current name
948
alt_interface = (attribute._dbus_interface
949
.replace("se.recompile.Mandos",
950
"se.bsnet.fukt.Mandos"))
1624
alt_interface = attribute._dbus_interface.replace(
1625
orig_interface_name, alt_interface_name)
1626
interface_names.add(alt_interface)
951
1627
# Is this a D-Bus signal?
952
1628
if getattr(attribute, "_dbus_is_signal", False):
953
# Extract the original non-method function by
954
# black magic
955
nonmethod_func = (dict(
1629
# Extract the original non-method undecorated
1630
# function by black magic
1631
if sys.version_info.major == 2:
1632
nonmethod_func = (dict(
956
1633
zip(attribute.func_code.co_freevars,
957
attribute.__closure__))["func"]
958
.cell_contents)
1634
attribute.__closure__))
1635
["func"].cell_contents)
1636
else:
1637
nonmethod_func = (dict(
1638
zip(attribute.__code__.co_freevars,
1639
attribute.__closure__))
1640
["func"].cell_contents)
959
1641
# Create a new, but exactly alike, function
960
1642
# object, and decorate it to be a new D-Bus signal
961
1643
# with the alternate D-Bus interface name
962
new_function = (dbus.service.signal
963
(alt_interface,
964
attribute._dbus_signature)
965
(types.FunctionType(
966
nonmethod_func.func_code,
967
nonmethod_func.func_globals,
968
nonmethod_func.func_name,
969
nonmethod_func.func_defaults,
970
nonmethod_func.func_closure)))
1644
new_function = copy_function(nonmethod_func)
1645
new_function = (dbus.service.signal(
1646
alt_interface,
1647
attribute._dbus_signature)(new_function))
1648
# Copy annotations, if any
1649
try:
1650
new_function._dbus_annotations = dict(
1651
attribute._dbus_annotations)
1652
except AttributeError:
1653
pass
1654
971
1655
# Define a creator of a function to call both the
972
# old and new functions, so both the old and new
973
# signals gets sent when the function is called
1656
# original and alternate functions, so both the
1657
# original and alternate signals gets sent when
1658
# the function is called
974
1659
def fixscope(func1, func2):
975
1660
"""This function is a scope container to pass
976
1661
func1 and func2 to the "call_both" function
977
1662
outside of its arguments"""
1663
1664
@functools.wraps(func2)
978
1665
def call_both(*args, **kwargs):
979
1666
"""This function will emit two D-Bus
980
1667
signals by calling func1 and func2"""
981
1668
func1(*args, **kwargs)
982
1669
func2(*args, **kwargs)
1670
# Make wrapper function look like a D-Bus
1671
# signal
1672
for name, attr in inspect.getmembers(func2):
1673
if name.startswith("_dbus_"):
1674
setattr(call_both, name, attr)
1675
983
1676
return call_both
984
1677
# Create the "call_both" function and add it to
985
1678
# the class
986
attr[attrname] = fixscope(attribute,
987
new_function)
1679
attr[attrname] = fixscope(attribute, new_function)
988
1680
# Is this a D-Bus method?
989
1681
elif getattr(attribute, "_dbus_is_method", False):
990
1682
# Create a new, but exactly alike, function
991
1683
# object. Decorate it to be a new D-Bus method
992
1684
# with the alternate D-Bus interface name. Add it
993
1685
# to the class.
994
attr[attrname] = (dbus.service.method
995
(alt_interface,
996
attribute._dbus_in_signature,
997
attribute._dbus_out_signature)
998
(types.FunctionType
999
(attribute.func_code,
1000
attribute.func_globals,
1001
attribute.func_name,
1002
attribute.func_defaults,
1003
attribute.func_closure)))
1686
attr[attrname] = (
1687
dbus.service.method(
1688
alt_interface,
1689
attribute._dbus_in_signature,
1690
attribute._dbus_out_signature)
1691
(copy_function(attribute)))
1692
# Copy annotations, if any
1693
try:
1694
attr[attrname]._dbus_annotations = dict(
1695
attribute._dbus_annotations)
1696
except AttributeError:
1697
pass
1004
1698
# Is this a D-Bus property?
1005
1699
elif getattr(attribute, "_dbus_is_property", False):
1006
1700
# Create a new, but exactly alike, function
1007
1701
# object, and decorate it to be a new D-Bus
1008
1702
# property with the alternate D-Bus interface
1009
1703
# name. Add it to the class.
1010
attr[attrname] = (dbus_service_property
1011
(alt_interface,
1012
attribute._dbus_signature,
1013
attribute._dbus_access,
1014
attribute
1015
._dbus_get_args_options
1016
["byte_arrays"])
1017
(types.FunctionType
1018
(attribute.func_code,
1019
attribute.func_globals,
1020
attribute.func_name,
1021
attribute.func_defaults,
1022
attribute.func_closure)))
1023
return type.__new__(mcs, name, bases, attr)
1024
1025
1704
attr[attrname] = (dbus_service_property(
1705
alt_interface, attribute._dbus_signature,
1706
attribute._dbus_access,
1707
attribute._dbus_get_args_options
1708
["byte_arrays"])
1709
(copy_function(attribute)))
1710
# Copy annotations, if any
1711
try:
1712
attr[attrname]._dbus_annotations = dict(
1713
attribute._dbus_annotations)
1714
except AttributeError:
1715
pass
1716
# Is this a D-Bus interface?
1717
elif getattr(attribute, "_dbus_is_interface", False):
1718
# Create a new, but exactly alike, function
1719
# object. Decorate it to be a new D-Bus interface
1720
# with the alternate D-Bus interface name. Add it
1721
# to the class.
1722
attr[attrname] = (
1723
dbus_interface_annotations(alt_interface)
1724
(copy_function(attribute)))
1725
if deprecate:
1726
# Deprecate all alternate interfaces
1727
iname = "_AlternateDBusNames_interface_annotation{}"
1728
for interface_name in interface_names:
1729
1730
@dbus_interface_annotations(interface_name)
1731
def func(self):
1732
return {"org.freedesktop.DBus.Deprecated":
1733
"true"}
1734
# Find an unused name
1735
for aname in (iname.format(i)
1736
for i in itertools.count()):
1737
if aname not in attr:
1738
attr[aname] = func
1739
break
1740
if interface_names:
1741
# Replace the class with a new subclass of it with
1742
# methods, signals, etc. as created above.
1743
if sys.version_info.major == 2:
1744
cls = type(b"{}Alternate".format(cls.__name__),
1745
(cls, ), attr)
1746
else:
1747
cls = type("{}Alternate".format(cls.__name__),
1748
(cls, ), attr)
1749
return cls
1750
1751
return wrapper
1752
1753
1754
@alternate_dbus_interfaces({"se.recompile.Mandos":
1755
"se.bsnet.fukt.Mandos"})
1026
1756
class ClientDBus(Client, DBusObjectWithProperties):
1027
1757
"""A Client class using D-Bus
1028
1758
1029
1759
Attributes:
1030
1760
dbus_object_path: dbus.ObjectPath
1031
1761
bus: dbus.SystemBus()
1032
1762
"""
1033
1763
1034
1764
runtime_expansions = (Client.runtime_expansions
1035
+ ("dbus_object_path",))
1036
1765
+ ("dbus_object_path", ))
1766
1767
_interface = "se.recompile.Mandos.Client"
1768
1037
1769
# dbus.service.Object doesn't use super(), so we can't either.
1038
1039
def __init__(self, bus = None, *args, **kwargs):
1770
1771
def __init__(self, bus=None, *args, **kwargs):
1040
1772
self.bus = bus
1041
1773
Client.__init__(self, *args, **kwargs)
1042
self._approvals_pending = 0
1043
1044
self._approvals_pending = 0
1045
1774
# Only now, when this client is initialized, can it show up on
1046
1775
# the D-Bus
1047
client_object_name = unicode(self.name).translate(
1776
client_object_name = str(self.name).translate(
1048
1777
{ord("."): ord("_"),
1049
1778
ord("-"): ord("_")})
1050
self.dbus_object_path = (dbus.ObjectPath
1051
("/clients/" + client_object_name))
1779
self.dbus_object_path = dbus.ObjectPath(
1780
"/clients/" + client_object_name)
1052
1781
DBusObjectWithProperties.__init__(self, self.bus,
1053
1782
self.dbus_object_path)
1054
1055
def notifychangeproperty(transform_func,
1056
dbus_name, type_func=lambda x: x,
1057
variant_level=1):
1783
1784
def notifychangeproperty(transform_func, dbus_name,
1785
type_func=lambda x: x,
1786
variant_level=1,
1787
invalidate_only=False,
1788
_interface=_interface):
1058
1789
""" Modify a variable so that it's a property which announces
1059
1790
its changes to DBus.
1060
1791
1061
1792
transform_fun: Function that takes a value and a variant_level
1062
1793
and transforms it to a D-Bus type.
1063
1794
dbus_name: D-Bus name of the variable
1065
1796
to the D-Bus. Default: no transform
1066
1797
variant_level: D-Bus variant level. Default: 1
1067
1798
"""
1068
attrname = "_{0}".format(dbus_name)
1799
attrname = "_{}".format(dbus_name)
1800
1069
1801
def setter(self, value):
1070
1802
if hasattr(self, "dbus_object_path"):
1071
1803
if (not hasattr(self, attrname) or
1072
1804
type_func(getattr(self, attrname, None))
1073
1805
!= type_func(value)):
1074
dbus_value = transform_func(type_func(value),
1075
variant_level
1076
=variant_level)
1077
self.PropertyChanged(dbus.String(dbus_name),
1078
dbus_value)
1806
if invalidate_only:
1807
self.PropertiesChanged(
1808
_interface, dbus.Dictionary(),
1809
dbus.Array((dbus_name, )))
1810
else:
1811
dbus_value = transform_func(
1812
type_func(value),
1813
variant_level=variant_level)
1814
self.PropertyChanged(dbus.String(dbus_name),
1815
dbus_value)
1816
self.PropertiesChanged(
1817
_interface,
1818
dbus.Dictionary({dbus.String(dbus_name):
1819
dbus_value}),
1820
dbus.Array())
1079
1821
setattr(self, attrname, value)
1080
1822
1081
1823
return property(lambda self: getattr(self, attrname), setter)
1082
1083
1824
1084
1825
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1085
1826
approvals_pending = notifychangeproperty(dbus.Boolean,
1086
1827
"ApprovalPending",
1087
type_func = bool)
1828
type_func=bool)
1088
1829
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1089
1830
last_enabled = notifychangeproperty(datetime_to_dbus,
1090
1831
"LastEnabled")
1091
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1092
type_func = lambda checker:
1093
checker is not None)
1832
checker = notifychangeproperty(
1833
dbus.Boolean, "CheckerRunning",
1834
type_func=lambda checker: checker is not None)
1094
1835
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1095
1836
"LastCheckedOK")
1837
last_checker_status = notifychangeproperty(dbus.Int16,
1838
"LastCheckerStatus")
1096
1839
last_approval_request = notifychangeproperty(
1097
1840
datetime_to_dbus, "LastApprovalRequest")
1098
1841
approved_by_default = notifychangeproperty(dbus.Boolean,
1099
1842
"ApprovedByDefault")
1100
approval_delay = notifychangeproperty(dbus.UInt64,
1101
"ApprovalDelay",
1102
type_func =
1103
timedelta_to_milliseconds)
1843
approval_delay = notifychangeproperty(
1844
dbus.UInt64, "ApprovalDelay",
1845
type_func=lambda td: td.total_seconds() * 1000)
1104
1846
approval_duration = notifychangeproperty(
1105
1847
dbus.UInt64, "ApprovalDuration",
1106
type_func = timedelta_to_milliseconds)
1848
type_func=lambda td: td.total_seconds() * 1000)
1107
1849
host = notifychangeproperty(dbus.String, "Host")
1108
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1109
type_func =
1110
timedelta_to_milliseconds)
1850
timeout = notifychangeproperty(
1851
dbus.UInt64, "Timeout",
1852
type_func=lambda td: td.total_seconds() * 1000)
1111
1853
extended_timeout = notifychangeproperty(
1112
1854
dbus.UInt64, "ExtendedTimeout",
1113
type_func = timedelta_to_milliseconds)
1114
interval = notifychangeproperty(dbus.UInt64,
1115
"Interval",
1116
type_func =
1117
timedelta_to_milliseconds)
1855
type_func=lambda td: td.total_seconds() * 1000)
1856
interval = notifychangeproperty(
1857
dbus.UInt64, "Interval",
1858
type_func=lambda td: td.total_seconds() * 1000)
1118
1859
checker_command = notifychangeproperty(dbus.String, "Checker")
1119
1860
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1861
invalidate_only=True)
1862
1120
1863
del notifychangeproperty
1121
1864
1122
1865
def __del__(self, *args, **kwargs):
1123
1866
try:
1124
1867
self.remove_from_connection()
1127
1870
if hasattr(DBusObjectWithProperties, "__del__"):
1128
1871
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1129
1872
Client.__del__(self, *args, **kwargs)
1130
1131
def checker_callback(self, pid, condition, command,
1132
*args, **kwargs):
1133
self.checker_callback_tag = None
1134
self.checker = None
1135
if os.WIFEXITED(condition):
1136
exitstatus = os.WEXITSTATUS(condition)
1873
1874
def checker_callback(self, source, condition,
1875
connection, command, *args, **kwargs):
1876
ret = Client.checker_callback(self, source, condition,
1877
connection, command, *args,
1878
**kwargs)
1879
exitstatus = self.last_checker_status
1880
if exitstatus >= 0:
1137
1881
# Emit D-Bus signal
1138
1882
self.CheckerCompleted(dbus.Int16(exitstatus),
1139
dbus.Int64(condition),
1883
# This is specific to GNU libC
1884
dbus.Int64(exitstatus << 8),
1140
1885
dbus.String(command))
1141
1886
else:
1142
1887
# Emit D-Bus signal
1143
1888
self.CheckerCompleted(dbus.Int16(-1),
1144
dbus.Int64(condition),
1889
dbus.Int64(
1890
# This is specific to GNU libC
1891
(exitstatus << 8)
1892
| self.last_checker_signal),
1145
1893
dbus.String(command))
1146
1147
return Client.checker_callback(self, pid, condition, command,
1148
*args, **kwargs)
1149
1894
return ret
1895
1150
1896
def start_checker(self, *args, **kwargs):
1151
old_checker = self.checker
1152
if self.checker is not None:
1153
old_checker_pid = self.checker.pid
1154
else:
1155
old_checker_pid = None
1897
old_checker_pid = getattr(self.checker, "pid", None)
1156
1898
r = Client.start_checker(self, *args, **kwargs)
1157
1899
# Only if new checker process was started
1158
1900
if (self.checker is not None
1160
1902
# Emit D-Bus signal
1161
1903
self.CheckerStarted(self.current_checker_command)
1162
1904
return r
1163
1905
1164
1906
def _reset_approved(self):
1165
1907
self.approved = None
1166
1908
return False
1167
1909
1168
1910
def approve(self, value=True):
1169
self.send_changedstate()
1170
1911
self.approved = value
1171
gobject.timeout_add(timedelta_to_milliseconds
1172
(self.approval_duration),
1173
self._reset_approved)
1174
1175
1176
## D-Bus methods, signals & properties
1177
_interface = "se.recompile.Mandos.Client"
1178
1179
## Signals
1180
1912
GLib.timeout_add(int(self.approval_duration.total_seconds()
1913
* 1000), self._reset_approved)
1914
self.send_changedstate()
1915
1916
# D-Bus methods, signals & properties
1917
1918
# Interfaces
1919
1920
# Signals
1921
1181
1922
# CheckerCompleted - signal
1182
1923
@dbus.service.signal(_interface, signature="nxs")
1183
1924
def CheckerCompleted(self, exitcode, waitstatus, command):
1184
1925
"D-Bus signal"
1185
1926
pass
1186
1927
1187
1928
# CheckerStarted - signal
1188
1929
@dbus.service.signal(_interface, signature="s")
1189
1930
def CheckerStarted(self, command):
1190
1931
"D-Bus signal"
1191
1932
pass
1192
1933
1193
1934
# PropertyChanged - signal
1935
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1194
1936
@dbus.service.signal(_interface, signature="sv")
1195
1937
def PropertyChanged(self, property, value):
1196
1938
"D-Bus signal"
1197
1939
pass
1198
1940
1199
1941
# GotSecret - signal
1200
1942
@dbus.service.signal(_interface)
1201
1943
def GotSecret(self):
1204
1946
server to mandos-client
1205
1947
"""
1206
1948
pass
1207
1949
1208
1950
# Rejected - signal
1209
1951
@dbus.service.signal(_interface, signature="s")
1210
1952
def Rejected(self, reason):
1211
1953
"D-Bus signal"
1212
1954
pass
1213
1955
1214
1956
# NeedApproval - signal
1215
1957
@dbus.service.signal(_interface, signature="tb")
1216
1958
def NeedApproval(self, timeout, default):
1217
1959
"D-Bus signal"
1218
1960
return self.need_approval()
1219
1220
# NeRwequest - signal
1221
@dbus.service.signal(_interface, signature="s")
1222
def NewRequest(self, ip):
1223
"""D-Bus signal
1224
Is sent after a client request a password.
1225
"""
1226
pass
1227
1228
## Methods
1229
1961
1962
# Methods
1963
1230
1964
# Approve - method
1231
1965
@dbus.service.method(_interface, in_signature="b")
1232
1966
def Approve(self, value):
1233
1967
self.approve(value)
1234
1968
1235
1969
# CheckedOK - method
1236
1970
@dbus.service.method(_interface)
1237
1971
def CheckedOK(self):
1238
1972
self.checked_ok()
1239
1973
1240
1974
# Enable - method
1975
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1241
1976
@dbus.service.method(_interface)
1242
1977
def Enable(self):
1243
1978
"D-Bus method"
1244
1979
self.enable()
1245
1980
1246
1981
# StartChecker - method
1982
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1247
1983
@dbus.service.method(_interface)
1248
1984
def StartChecker(self):
1249
1985
"D-Bus method"
1250
1986
self.start_checker()
1251
1987
1252
1988
# Disable - method
1989
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1253
1990
@dbus.service.method(_interface)
1254
1991
def Disable(self):
1255
1992
"D-Bus method"
1256
1993
self.disable()
1257
1994
1258
1995
# StopChecker - method
1996
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1259
1997
@dbus.service.method(_interface)
1260
1998
def StopChecker(self):
1261
1999
self.stop_checker()
1262
1263
## Properties
1264
2000
2001
# Properties
2002
1265
2003
# ApprovalPending - property
1266
2004
@dbus_service_property(_interface, signature="b", access="read")
1267
2005
def ApprovalPending_dbus_property(self):
1268
2006
return dbus.Boolean(bool(self.approvals_pending))
1269
2007
1270
2008
# ApprovedByDefault - property
1271
@dbus_service_property(_interface, signature="b",
2009
@dbus_service_property(_interface,
2010
signature="b",
1272
2011
access="readwrite")
1273
2012
def ApprovedByDefault_dbus_property(self, value=None):
1274
2013
if value is None: # get
1275
2014
return dbus.Boolean(self.approved_by_default)
1276
2015
self.approved_by_default = bool(value)
1277
2016
1278
2017
# ApprovalDelay - property
1279
@dbus_service_property(_interface, signature="t",
2018
@dbus_service_property(_interface,
2019
signature="t",
1280
2020
access="readwrite")
1281
2021
def ApprovalDelay_dbus_property(self, value=None):
1282
2022
if value is None: # get
1283
return dbus.UInt64(self.approval_delay_milliseconds())
2023
return dbus.UInt64(self.approval_delay.total_seconds()
2024
* 1000)
1284
2025
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1285
2026
1286
2027
# ApprovalDuration - property
1287
@dbus_service_property(_interface, signature="t",
2028
@dbus_service_property(_interface,
2029
signature="t",
1288
2030
access="readwrite")
1289
2031
def ApprovalDuration_dbus_property(self, value=None):
1290
2032
if value is None: # get
1291
return dbus.UInt64(timedelta_to_milliseconds(
1292
self.approval_duration))
2033
return dbus.UInt64(self.approval_duration.total_seconds()
2034
* 1000)
1293
2035
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1294
2036
1295
2037
# Name - property
2038
@dbus_annotations(
2039
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1296
2040
@dbus_service_property(_interface, signature="s", access="read")
1297
2041
def Name_dbus_property(self):
1298
2042
return dbus.String(self.name)
1299
2043
2044
# KeyID - property
2045
@dbus_annotations(
2046
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2047
@dbus_service_property(_interface, signature="s", access="read")
2048
def KeyID_dbus_property(self):
2049
return dbus.String(self.key_id)
2050
1300
2051
# Fingerprint - property
2052
@dbus_annotations(
2053
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1301
2054
@dbus_service_property(_interface, signature="s", access="read")
1302
2055
def Fingerprint_dbus_property(self):
1303
2056
return dbus.String(self.fingerprint)
1304
2057
1305
2058
# Host - property
1306
@dbus_service_property(_interface, signature="s",
2059
@dbus_service_property(_interface,
2060
signature="s",
1307
2061
access="readwrite")
1308
2062
def Host_dbus_property(self, value=None):
1309
2063
if value is None: # get
1310
2064
return dbus.String(self.host)
1311
self.host = unicode(value)
1312
2065
self.host = str(value)
2066
1313
2067
# Created - property
2068
@dbus_annotations(
2069
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1314
2070
@dbus_service_property(_interface, signature="s", access="read")
1315
2071
def Created_dbus_property(self):
1316
2072
return datetime_to_dbus(self.created)
1317
2073
1318
2074
# LastEnabled - property
1319
2075
@dbus_service_property(_interface, signature="s", access="read")
1320
2076
def LastEnabled_dbus_property(self):
1321
2077
return datetime_to_dbus(self.last_enabled)
1322
2078
1323
2079
# Enabled - property
1324
@dbus_service_property(_interface, signature="b",
2080
@dbus_service_property(_interface,
2081
signature="b",
1325
2082
access="readwrite")
1326
2083
def Enabled_dbus_property(self, value=None):
1327
2084
if value is None: # get
1330
2087
self.enable()
1331
2088
else:
1332
2089
self.disable()
1333
2090
1334
2091
# LastCheckedOK - property
1335
@dbus_service_property(_interface, signature="s",
2092
@dbus_service_property(_interface,
2093
signature="s",
1336
2094
access="readwrite")
1337
2095
def LastCheckedOK_dbus_property(self, value=None):
1338
2096
if value is not None:
1339
2097
self.checked_ok()
1340
2098
return
1341
2099
return datetime_to_dbus(self.last_checked_ok)
1342
2100
2101
# LastCheckerStatus - property
2102
@dbus_service_property(_interface, signature="n", access="read")
2103
def LastCheckerStatus_dbus_property(self):
2104
return dbus.Int16(self.last_checker_status)
2105
1343
2106
# Expires - property
1344
2107
@dbus_service_property(_interface, signature="s", access="read")
1345
2108
def Expires_dbus_property(self):
1346
2109
return datetime_to_dbus(self.expires)
1347
2110
1348
2111
# LastApprovalRequest - property
1349
2112
@dbus_service_property(_interface, signature="s", access="read")
1350
2113
def LastApprovalRequest_dbus_property(self):
1351
2114
return datetime_to_dbus(self.last_approval_request)
1352
2115
1353
2116
# Timeout - property
1354
@dbus_service_property(_interface, signature="t",
2117
@dbus_service_property(_interface,
2118
signature="t",
1355
2119
access="readwrite")
1356
2120
def Timeout_dbus_property(self, value=None):
1357
2121
if value is None: # get
1358
return dbus.UInt64(self.timeout_milliseconds())
2122
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2123
old_timeout = self.timeout
1359
2124
self.timeout = datetime.timedelta(0, 0, 0, value)
1360
if getattr(self, "disable_initiator_tag", None) is None:
1361
return
1362
# Reschedule timeout
1363
gobject.source_remove(self.disable_initiator_tag)
1364
self.disable_initiator_tag = None
1365
self.expires = None
1366
time_to_die = timedelta_to_milliseconds((self
1367
.last_checked_ok
1368
+ self.timeout)
1369
- datetime.datetime
1370
.utcnow())
1371
if time_to_die <= 0:
1372
# The timeout has passed
1373
self.disable()
1374
else:
1375
self.expires = (datetime.datetime.utcnow()
1376
+ datetime.timedelta(milliseconds =
1377
time_to_die))
1378
self.disable_initiator_tag = (gobject.timeout_add
1379
(time_to_die, self.disable))
1380
2125
# Reschedule disabling
2126
if self.enabled:
2127
now = datetime.datetime.utcnow()
2128
self.expires += self.timeout - old_timeout
2129
if self.expires <= now:
2130
# The timeout has passed
2131
self.disable()
2132
else:
2133
if (getattr(self, "disable_initiator_tag", None)
2134
is None):
2135
return
2136
GLib.source_remove(self.disable_initiator_tag)
2137
self.disable_initiator_tag = GLib.timeout_add(
2138
int((self.expires - now).total_seconds() * 1000),
2139
self.disable)
2140
1381
2141
# ExtendedTimeout - property
1382
@dbus_service_property(_interface, signature="t",
2142
@dbus_service_property(_interface,
2143
signature="t",
1383
2144
access="readwrite")
1384
2145
def ExtendedTimeout_dbus_property(self, value=None):
1385
2146
if value is None: # get
1386
return dbus.UInt64(self.extended_timeout_milliseconds())
2147
return dbus.UInt64(self.extended_timeout.total_seconds()
2148
* 1000)
1387
2149
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1388
2150
1389
2151
# Interval - property
1390
@dbus_service_property(_interface, signature="t",
2152
@dbus_service_property(_interface,
2153
signature="t",
1391
2154
access="readwrite")
1392
2155
def Interval_dbus_property(self, value=None):
1393
2156
if value is None: # get
1394
return dbus.UInt64(self.interval_milliseconds())
2157
return dbus.UInt64(self.interval.total_seconds() * 1000)
1395
2158
self.interval = datetime.timedelta(0, 0, 0, value)
1396
2159
if getattr(self, "checker_initiator_tag", None) is None:
1397
2160
return
1398
2161
if self.enabled:
1399
2162
# Reschedule checker run
1400
gobject.source_remove(self.checker_initiator_tag)
1401
self.checker_initiator_tag = (gobject.timeout_add
1402
(value, self.start_checker))
1403
self.start_checker() # Start one now, too
1404
2163
GLib.source_remove(self.checker_initiator_tag)
2164
self.checker_initiator_tag = GLib.timeout_add(
2165
value, self.start_checker)
2166
self.start_checker() # Start one now, too
2167
1405
2168
# Checker - property
1406
@dbus_service_property(_interface, signature="s",
2169
@dbus_service_property(_interface,
2170
signature="s",
1407
2171
access="readwrite")
1408
2172
def Checker_dbus_property(self, value=None):
1409
2173
if value is None: # get
1410
2174
return dbus.String(self.checker_command)
1411
self.checker_command = unicode(value)
1412
2175
self.checker_command = str(value)
2176
1413
2177
# CheckerRunning - property
1414
@dbus_service_property(_interface, signature="b",
2178
@dbus_service_property(_interface,
2179
signature="b",
1415
2180
access="readwrite")
1416
2181
def CheckerRunning_dbus_property(self, value=None):
1417
2182
if value is None: # get
1420
2185
self.start_checker()
1421
2186
else:
1422
2187
self.stop_checker()
1423
2188
1424
2189
# ObjectPath - property
2190
@dbus_annotations(
2191
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2192
"org.freedesktop.DBus.Deprecated": "true"})
1425
2193
@dbus_service_property(_interface, signature="o", access="read")
1426
2194
def ObjectPath_dbus_property(self):
1427
return self.dbus_object_path # is already a dbus.ObjectPath
1428
2195
return self.dbus_object_path # is already a dbus.ObjectPath
2196
1429
2197
# Secret = property
1430
@dbus_service_property(_interface, signature="ay",
1431
access="write", byte_arrays=True)
2198
@dbus_annotations(
2199
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2200
"invalidates"})
2201
@dbus_service_property(_interface,
2202
signature="ay",
2203
access="write",
2204
byte_arrays=True)
1432
2205
def Secret_dbus_property(self, value):
1433
self.secret = str(value)
1434
2206
self.secret = bytes(value)
2207
1435
2208
del _interface
1436
2209
1437
2210
1438
2211
class ProxyClient(object):
1439
def __init__(self, child_pipe, fpr, address):
2212
def __init__(self, child_pipe, key_id, fpr, address):
1440
2213
self._pipe = child_pipe
1441
self._pipe.send(('init', fpr, address))
2214
self._pipe.send(('init', key_id, fpr, address))
1442
2215
if not self._pipe.recv():
1443
raise KeyError()
1444
2216
raise KeyError(key_id or fpr)
2217
1445
2218
def __getattribute__(self, name):
1446
2219
if name == '_pipe':
1447
2220
return super(ProxyClient, self).__getattribute__(name)
1450
2223
if data[0] == 'data':
1451
2224
return data[1]
1452
2225
if data[0] == 'function':
2226
1453
2227
def func(*args, **kwargs):
1454
2228
self._pipe.send(('funcall', name, args, kwargs))
1455
2229
return self._pipe.recv()[1]
2230
1456
2231
return func
1457
2232
1458
2233
def __setattr__(self, name, value):
1459
2234
if name == '_pipe':
1460
2235
return super(ProxyClient, self).__setattr__(name, value)
1461
2236
self._pipe.send(('setattr', name, value))
1462
2237
1463
2238
1464
class ClientDBusTransitional(ClientDBus):
1465
__metaclass__ = AlternateDBusNamesMetaclass
1466
1467
1468
2239
class ClientHandler(socketserver.BaseRequestHandler, object):
1469
2240
"""A class to handle client connections.
1470
2241
1471
2242
Instantiated once for each connection to handle it.
1472
2243
Note: This will run in its own forked process."""
1473
2244
1474
2245
def handle(self):
1475
2246
with contextlib.closing(self.server.child_pipe) as child_pipe:
1476
2247
logger.info("TCP connection from: %s",
1477
unicode(self.client_address))
2248
str(self.client_address))
1478
2249
logger.debug("Pipe FD: %d",
1479
2250
self.server.child_pipe.fileno())
1480
1481
session = (gnutls.connection
1482
.ClientSession(self.request,
1483
gnutls.connection
1484
.X509Credentials()))
1485
1486
# Note: gnutls.connection.X509Credentials is really a
1487
# generic GnuTLS certificate credentials object so long as
1488
# no X.509 keys are added to it. Therefore, we can use it
1489
# here despite using OpenPGP certificates.
1490
1491
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1492
# "+AES-256-CBC", "+SHA1",
1493
# "+COMP-NULL", "+CTYPE-OPENPGP",
1494
# "+DHE-DSS"))
2251
2252
session = gnutls.ClientSession(self.request)
2253
2254
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2255
# "+AES-256-CBC", "+SHA1",
2256
# "+COMP-NULL", "+CTYPE-OPENPGP",
2257
# "+DHE-DSS"))
1495
2258
# Use a fallback default, since this MUST be set.
1496
2259
priority = self.server.gnutls_priority
1497
2260
if priority is None:
1498
2261
priority = "NORMAL"
1499
(gnutls.library.functions
1500
.gnutls_priority_set_direct(session._c_object,
1501
priority, None))
1502
2262
gnutls.priority_set_direct(session._c_object,
2263
priority.encode("utf-8"),
2264
None)
2265
1503
2266
# Start communication using the Mandos protocol
1504
2267
# Get protocol number
1505
2268
line = self.request.makefile().readline()
1506
2269
logger.debug("Protocol version: %r", line)
1507
2270
try:
1508
2271
if int(line.strip().split()[0]) > 1:
1509
raise RuntimeError
2272
raise RuntimeError(line)
1510
2273
except (ValueError, IndexError, RuntimeError) as error:
1511
2274
logger.error("Unknown protocol version: %s", error)
1512
2275
return
1513
2276
1514
2277
# Start GnuTLS connection
1515
2278
try:
1516
2279
session.handshake()
1517
except gnutls.errors.GNUTLSError as error:
2280
except gnutls.Error as error:
1518
2281
logger.warning("Handshake failed: %s", error)
1519
2282
# Do not run session.bye() here: the session is not
1520
2283
# established. Just abandon the request.
1521
2284
return
1522
2285
logger.debug("Handshake succeeded")
1523
2286
1524
2287
approval_required = False
1525
2288
try:
1526
try:
1527
fpr = self.fingerprint(self.peer_certificate
1528
(session))
1529
except (TypeError,
1530
gnutls.errors.GNUTLSError) as error:
1531
logger.warning("Bad certificate: %s", error)
1532
return
1533
logger.debug("Fingerprint: %s", fpr)
1534
1535
try:
1536
client = ProxyClient(child_pipe, fpr,
2289
if gnutls.has_rawpk:
2290
fpr = ""
2291
try:
2292
key_id = self.key_id(
2293
self.peer_certificate(session))
2294
except (TypeError, gnutls.Error) as error:
2295
logger.warning("Bad certificate: %s", error)
2296
return
2297
logger.debug("Key ID: %s", key_id)
2298
2299
else:
2300
key_id = ""
2301
try:
2302
fpr = self.fingerprint(
2303
self.peer_certificate(session))
2304
except (TypeError, gnutls.Error) as error:
2305
logger.warning("Bad certificate: %s", error)
2306
return
2307
logger.debug("Fingerprint: %s", fpr)
2308
2309
try:
2310
client = ProxyClient(child_pipe, key_id, fpr,
1537
2311
self.client_address)
1538
2312
except KeyError:
1539
2313
return
1540
1541
if self.server.use_dbus:
1542
# Emit D-Bus signal
1543
client.NewRequest(str(self.client_address))
1544
2314
1545
2315
if client.approval_delay:
1546
2316
delay = client.approval_delay
1547
2317
client.approvals_pending += 1
1548
2318
approval_required = True
1549
2319
1550
2320
while True:
1551
2321
if not client.enabled:
1552
2322
logger.info("Client %s is disabled",
1553
client.name)
2323
client.name)
1554
2324
if self.server.use_dbus:
1555
2325
# Emit D-Bus signal
1556
2326
client.Rejected("Disabled")
1557
2327
return
1558
2328
1559
2329
if client.approved or not client.approval_delay:
1560
#We are approved or approval is disabled
2330
# We are approved or approval is disabled
1561
2331
break
1562
2332
elif client.approved is None:
1563
2333
logger.info("Client %s needs approval",
1565
2335
if self.server.use_dbus:
1566
2336
# Emit D-Bus signal
1567
2337
client.NeedApproval(
1568
client.approval_delay_milliseconds(),
1569
client.approved_by_default)
2338
client.approval_delay.total_seconds()
2339
* 1000, client.approved_by_default)
1570
2340
else:
1571
2341
logger.warning("Client %s was not approved",
1572
2342
client.name)
1574
2344
# Emit D-Bus signal
1575
2345
client.Rejected("Denied")
1576
2346
return
1577
1578
#wait until timeout or approved
2347
2348
# wait until timeout or approved
1579
2349
time = datetime.datetime.now()
1580
2350
client.changedstate.acquire()
1581
(client.changedstate.wait
1582
(float(client.timedelta_to_milliseconds(delay)
1583
/ 1000)))
2351
client.changedstate.wait(delay.total_seconds())
1584
2352
client.changedstate.release()
1585
2353
time2 = datetime.datetime.now()
1586
2354
if (time2 - time) >= delay:
1596
2364
break
1597
2365
else:
1598
2366
delay -= time2 - time
1599
1600
sent_size = 0
1601
while sent_size < len(client.secret):
1602
try:
1603
sent = session.send(client.secret[sent_size:])
1604
except gnutls.errors.GNUTLSError as error:
1605
logger.warning("gnutls send failed")
1606
return
1607
logger.debug("Sent: %d, remaining: %d",
1608
sent, len(client.secret)
1609
- (sent_size + sent))
1610
sent_size += sent
1611
2367
2368
try:
2369
session.send(client.secret)
2370
except gnutls.Error as error:
2371
logger.warning("gnutls send failed",
2372
exc_info=error)
2373
return
2374
1612
2375
logger.info("Sending secret to %s", client.name)
1613
2376
# bump the timeout using extended_timeout
1614
client.checked_ok(client.extended_timeout)
2377
client.bump_timeout(client.extended_timeout)
1615
2378
if self.server.use_dbus:
1616
2379
# Emit D-Bus signal
1617
2380
client.GotSecret()
1618
2381
1619
2382
finally:
1620
2383
if approval_required:
1621
2384
client.approvals_pending -= 1
1622
2385
try:
1623
2386
session.bye()
1624
except gnutls.errors.GNUTLSError as error:
1625
logger.warning("GnuTLS bye failed")
1626
2387
except gnutls.Error as error:
2388
logger.warning("GnuTLS bye failed",
2389
exc_info=error)
2390
1627
2391
@staticmethod
1628
2392
def peer_certificate(session):
1629
"Return the peer's OpenPGP certificate as a bytestring"
1630
# If not an OpenPGP certificate...
1631
if (gnutls.library.functions
1632
.gnutls_certificate_type_get(session._c_object)
1633
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1634
# ...do the normal thing
1635
return session.peer_certificate
2393
"Return the peer's certificate as a bytestring"
2394
try:
2395
cert_type = gnutls.certificate_type_get2(session._c_object,
2396
gnutls.CTYPE_PEERS)
2397
except AttributeError:
2398
cert_type = gnutls.certificate_type_get(session._c_object)
2399
if gnutls.has_rawpk:
2400
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2401
else:
2402
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2403
# If not a valid certificate type...
2404
if cert_type not in valid_cert_types:
2405
logger.info("Cert type %r not in %r", cert_type,
2406
valid_cert_types)
2407
# ...return invalid data
2408
return b""
1636
2409
list_size = ctypes.c_uint(1)
1637
cert_list = (gnutls.library.functions
1638
.gnutls_certificate_get_peers
2410
cert_list = (gnutls.certificate_get_peers
1639
2411
(session._c_object, ctypes.byref(list_size)))
1640
2412
if not bool(cert_list) and list_size.value != 0:
1641
raise gnutls.errors.GNUTLSError("error getting peer"
1642
" certificate")
2413
raise gnutls.Error("error getting peer certificate")
1643
2414
if list_size.value == 0:
1644
2415
return None
1645
2416
cert = cert_list[0]
1646
2417
return ctypes.string_at(cert.data, cert.size)
1647
2418
2419
@staticmethod
2420
def key_id(certificate):
2421
"Convert a certificate bytestring to a hexdigit key ID"
2422
# New GnuTLS "datum" with the public key
2423
datum = gnutls.datum_t(
2424
ctypes.cast(ctypes.c_char_p(certificate),
2425
ctypes.POINTER(ctypes.c_ubyte)),
2426
ctypes.c_uint(len(certificate)))
2427
# XXX all these need to be created in the gnutls "module"
2428
# New empty GnuTLS certificate
2429
pubkey = gnutls.pubkey_t()
2430
gnutls.pubkey_init(ctypes.byref(pubkey))
2431
# Import the raw public key into the certificate
2432
gnutls.pubkey_import(pubkey,
2433
ctypes.byref(datum),
2434
gnutls.X509_FMT_DER)
2435
# New buffer for the key ID
2436
buf = ctypes.create_string_buffer(32)
2437
buf_len = ctypes.c_size_t(len(buf))
2438
# Get the key ID from the raw public key into the buffer
2439
gnutls.pubkey_get_key_id(pubkey,
2440
gnutls.KEYID_USE_SHA256,
2441
ctypes.cast(ctypes.byref(buf),
2442
ctypes.POINTER(ctypes.c_ubyte)),
2443
ctypes.byref(buf_len))
2444
# Deinit the certificate
2445
gnutls.pubkey_deinit(pubkey)
2446
2447
# Convert the buffer to a Python bytestring
2448
key_id = ctypes.string_at(buf, buf_len.value)
2449
# Convert the bytestring to hexadecimal notation
2450
hex_key_id = binascii.hexlify(key_id).upper()
2451
return hex_key_id
2452
1648
2453
@staticmethod
1649
2454
def fingerprint(openpgp):
1650
2455
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1651
2456
# New GnuTLS "datum" with the OpenPGP public key
1652
datum = (gnutls.library.types
1653
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1654
ctypes.POINTER
1655
(ctypes.c_ubyte)),
1656
ctypes.c_uint(len(openpgp))))
2457
datum = gnutls.datum_t(
2458
ctypes.cast(ctypes.c_char_p(openpgp),
2459
ctypes.POINTER(ctypes.c_ubyte)),
2460
ctypes.c_uint(len(openpgp)))
1657
2461
# New empty GnuTLS certificate
1658
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1659
(gnutls.library.functions
1660
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2462
crt = gnutls.openpgp_crt_t()
2463
gnutls.openpgp_crt_init(ctypes.byref(crt))
1661
2464
# Import the OpenPGP public key into the certificate
1662
(gnutls.library.functions
1663
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1664
gnutls.library.constants
1665
.GNUTLS_OPENPGP_FMT_RAW))
2465
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2466
gnutls.OPENPGP_FMT_RAW)
1666
2467
# Verify the self signature in the key
1667
2468
crtverify = ctypes.c_uint()
1668
(gnutls.library.functions
1669
.gnutls_openpgp_crt_verify_self(crt, 0,
1670
ctypes.byref(crtverify)))
2469
gnutls.openpgp_crt_verify_self(crt, 0,
2470
ctypes.byref(crtverify))
1671
2471
if crtverify.value != 0:
1672
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1673
raise (gnutls.errors.CertificateSecurityError
1674
("Verify failed"))
2472
gnutls.openpgp_crt_deinit(crt)
2473
raise gnutls.CertificateSecurityError(code
2474
=crtverify.value)
1675
2475
# New buffer for the fingerprint
1676
2476
buf = ctypes.create_string_buffer(20)
1677
2477
buf_len = ctypes.c_size_t()
1678
2478
# Get the fingerprint from the certificate into the buffer
1679
(gnutls.library.functions
1680
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1681
ctypes.byref(buf_len)))
2479
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2480
ctypes.byref(buf_len))
1682
2481
# Deinit the certificate
1683
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2482
gnutls.openpgp_crt_deinit(crt)
1684
2483
# Convert the buffer to a Python bytestring
1685
2484
fpr = ctypes.string_at(buf, buf_len.value)
1686
2485
# Convert the bytestring to hexadecimal notation
1690
2489
1691
2490
class MultiprocessingMixIn(object):
1692
2491
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2492
1693
2493
def sub_process_main(self, request, address):
1694
2494
try:
1695
2495
self.finish_request(request, address)
1696
2496
except Exception:
1697
2497
self.handle_error(request, address)
1698
2498
self.close_request(request)
1699
2499
1700
2500
def process_request(self, request, address):
1701
2501
"""Start a new process to process the request."""
1702
proc = multiprocessing.Process(target = self.sub_process_main,
1703
args = (request,
1704
address))
2502
proc = multiprocessing.Process(target=self.sub_process_main,
2503
args=(request, address))
1705
2504
proc.start()
1706
2505
return proc
1707
2506
1708
2507
1709
2508
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1710
2509
""" adds a pipe to the MixIn """
2510
1711
2511
def process_request(self, request, client_address):
1712
2512
"""Overrides and wraps the original process_request().
1713
2513
1714
2514
This function creates a new pipe in self.pipe
1715
2515
"""
1716
2516
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1717
2517
1718
2518
proc = MultiprocessingMixIn.process_request(self, request,
1719
2519
client_address)
1720
2520
self.child_pipe.close()
1721
2521
self.add_pipe(parent_pipe, proc)
1722
2522
1723
2523
def add_pipe(self, parent_pipe, proc):
1724
2524
"""Dummy function; override as necessary"""
1725
raise NotImplementedError
2525
raise NotImplementedError()
1726
2526
1727
2527
1728
2528
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1729
2529
socketserver.TCPServer, object):
1730
2530
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1731
2531
1732
2532
Attributes:
1733
2533
enabled: Boolean; whether this server is activated yet
1734
2534
interface: None or a network interface name (string)
1735
2535
use_ipv6: Boolean; to use IPv6 or not
1736
2536
"""
2537
1737
2538
def __init__(self, server_address, RequestHandlerClass,
1738
interface=None, use_ipv6=True):
2539
interface=None,
2540
use_ipv6=True,
2541
socketfd=None):
2542
"""If socketfd is set, use that file descriptor instead of
2543
creating a new one with socket.socket().
2544
"""
1739
2545
self.interface = interface
1740
2546
if use_ipv6:
1741
2547
self.address_family = socket.AF_INET6
2548
if socketfd is not None:
2549
# Save the file descriptor
2550
self.socketfd = socketfd
2551
# Save the original socket.socket() function
2552
self.socket_socket = socket.socket
2553
2554
# To implement --socket, we monkey patch socket.socket.
2555
#
2556
# (When socketserver.TCPServer is a new-style class, we
2557
# could make self.socket into a property instead of monkey
2558
# patching socket.socket.)
2559
#
2560
# Create a one-time-only replacement for socket.socket()
2561
@functools.wraps(socket.socket)
2562
def socket_wrapper(*args, **kwargs):
2563
# Restore original function so subsequent calls are
2564
# not affected.
2565
socket.socket = self.socket_socket
2566
del self.socket_socket
2567
# This time only, return a new socket object from the
2568
# saved file descriptor.
2569
return socket.fromfd(self.socketfd, *args, **kwargs)
2570
# Replace socket.socket() function with wrapper
2571
socket.socket = socket_wrapper
2572
# The socketserver.TCPServer.__init__ will call
2573
# socket.socket(), which might be our replacement,
2574
# socket_wrapper(), if socketfd was set.
1742
2575
socketserver.TCPServer.__init__(self, server_address,
1743
2576
RequestHandlerClass)
2577
1744
2578
def server_bind(self):
1745
2579
"""This overrides the normal server_bind() function
1746
2580
to bind to an interface if one was specified, and also NOT to
1747
2581
bind to an address or port if they were not specified."""
2582
global SO_BINDTODEVICE
1748
2583
if self.interface is not None:
1749
2584
if SO_BINDTODEVICE is None:
1750
logger.error("SO_BINDTODEVICE does not exist;"
1751
" cannot bind to interface %s",
1752
self.interface)
1753
else:
1754
try:
1755
self.socket.setsockopt(socket.SOL_SOCKET,
1756
SO_BINDTODEVICE,
1757
str(self.interface
1758
+ '\0'))
1759
except socket.error as error:
1760
if error[0] == errno.EPERM:
1761
logger.error("No permission to"
1762
" bind to interface %s",
1763
self.interface)
1764
elif error[0] == errno.ENOPROTOOPT:
1765
logger.error("SO_BINDTODEVICE not available;"
1766
" cannot bind to interface %s",
1767
self.interface)
1768
else:
1769
raise
2585
# Fall back to a hard-coded value which seems to be
2586
# common enough.
2587
logger.warning("SO_BINDTODEVICE not found, trying 25")
2588
SO_BINDTODEVICE = 25
2589
try:
2590
self.socket.setsockopt(
2591
socket.SOL_SOCKET, SO_BINDTODEVICE,
2592
(self.interface + "\0").encode("utf-8"))
2593
except socket.error as error:
2594
if error.errno == errno.EPERM:
2595
logger.error("No permission to bind to"
2596
" interface %s", self.interface)
2597
elif error.errno == errno.ENOPROTOOPT:
2598
logger.error("SO_BINDTODEVICE not available;"
2599
" cannot bind to interface %s",
2600
self.interface)
2601
elif error.errno == errno.ENODEV:
2602
logger.error("Interface %s does not exist,"
2603
" cannot bind", self.interface)
2604
else:
2605
raise
1770
2606
# Only bind(2) the socket if we really need to.
1771
2607
if self.server_address[0] or self.server_address[1]:
1772
2608
if not self.server_address[0]:
1773
2609
if self.address_family == socket.AF_INET6:
1774
any_address = "::" # in6addr_any
2610
any_address = "::" # in6addr_any
1775
2611
else:
1776
any_address = socket.INADDR_ANY
2612
any_address = "0.0.0.0" # INADDR_ANY
1777
2613
self.server_address = (any_address,
1778
2614
self.server_address[1])
1779
2615
elif not self.server_address[1]:
1780
self.server_address = (self.server_address[0],
1781
0)
2616
self.server_address = (self.server_address[0], 0)
1782
2617
# if self.interface:
1783
2618
# self.server_address = (self.server_address[0],
1784
2619
# 0, # port
1790
2625
1791
2626
class MandosServer(IPv6_TCPServer):
1792
2627
"""Mandos server.
1793
2628
1794
2629
Attributes:
1795
2630
clients: set of Client objects
1796
2631
gnutls_priority GnuTLS priority string
1797
2632
use_dbus: Boolean; to emit D-Bus signals or not
1798
1799
Assumes a gobject.MainLoop event loop.
2633
2634
Assumes a GLib.MainLoop event loop.
1800
2635
"""
2636
1801
2637
def __init__(self, server_address, RequestHandlerClass,
1802
interface=None, use_ipv6=True, clients=None,
1803
gnutls_priority=None, use_dbus=True):
2638
interface=None,
2639
use_ipv6=True,
2640
clients=None,
2641
gnutls_priority=None,
2642
use_dbus=True,
2643
socketfd=None):
1804
2644
self.enabled = False
1805
2645
self.clients = clients
1806
2646
if self.clients is None:
1809
2649
self.gnutls_priority = gnutls_priority
1810
2650
IPv6_TCPServer.__init__(self, server_address,
1811
2651
RequestHandlerClass,
1812
interface = interface,
1813
use_ipv6 = use_ipv6)
2652
interface=interface,
2653
use_ipv6=use_ipv6,
2654
socketfd=socketfd)
2655
1814
2656
def server_activate(self):
1815
2657
if self.enabled:
1816
2658
return socketserver.TCPServer.server_activate(self)
1817
2659
1818
2660
def enable(self):
1819
2661
self.enabled = True
1820
2662
1821
2663
def add_pipe(self, parent_pipe, proc):
1822
2664
# Call "handle_ipc" for both data and EOF events
1823
gobject.io_add_watch(parent_pipe.fileno(),
1824
gobject.IO_IN | gobject.IO_HUP,
1825
functools.partial(self.handle_ipc,
1826
parent_pipe =
1827
parent_pipe,
1828
proc = proc))
1829
1830
def handle_ipc(self, source, condition, parent_pipe=None,
1831
proc = None, client_object=None):
1832
condition_names = {
1833
gobject.IO_IN: "IN", # There is data to read.
1834
gobject.IO_OUT: "OUT", # Data can be written (without
1835
# blocking).
1836
gobject.IO_PRI: "PRI", # There is urgent data to read.
1837
gobject.IO_ERR: "ERR", # Error condition.
1838
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1839
# broken, usually for pipes and
1840
# sockets).
1841
}
1842
conditions_string = ' | '.join(name
1843
for cond, name in
1844
condition_names.iteritems()
1845
if cond & condition)
2665
GLib.io_add_watch(
2666
parent_pipe.fileno(),
2667
GLib.IO_IN | GLib.IO_HUP,
2668
functools.partial(self.handle_ipc,
2669
parent_pipe=parent_pipe,
2670
proc=proc))
2671
2672
def handle_ipc(self, source, condition,
2673
parent_pipe=None,
2674
proc=None,
2675
client_object=None):
1846
2676
# error, or the other end of multiprocessing.Pipe has closed
1847
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2677
if condition & (GLib.IO_ERR | GLib.IO_HUP):
1848
2678
# Wait for other process to exit
1849
2679
proc.join()
1850
2680
return False
1851
2681
1852
2682
# Read a request from the child
1853
2683
request = parent_pipe.recv()
1854
2684
command = request[0]
1855
2685
1856
2686
if command == 'init':
1857
fpr = request[1]
1858
address = request[2]
1859
1860
for c in self.clients.itervalues():
1861
if c.fingerprint == fpr:
2687
key_id = request[1].decode("ascii")
2688
fpr = request[2].decode("ascii")
2689
address = request[3]
2690
2691
for c in self.clients.values():
2692
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2693
continue
2694
if key_id and c.key_id == key_id:
2695
client = c
2696
break
2697
if fpr and c.fingerprint == fpr:
1862
2698
client = c
1863
2699
break
1864
2700
else:
1865
logger.info("Client not found for fingerprint: %s, ad"
1866
"dress: %s", fpr, address)
2701
logger.info("Client not found for key ID: %s, address"
2702
": %s", key_id or fpr, address)
1867
2703
if self.use_dbus:
1868
2704
# Emit D-Bus signal
1869
mandos_dbus_service.ClientNotFound(fpr,
2705
mandos_dbus_service.ClientNotFound(key_id or fpr,
1870
2706
address[0])
1871
2707
parent_pipe.send(False)
1872
2708
return False
1873
1874
gobject.io_add_watch(parent_pipe.fileno(),
1875
gobject.IO_IN | gobject.IO_HUP,
1876
functools.partial(self.handle_ipc,
1877
parent_pipe =
1878
parent_pipe,
1879
proc = proc,
1880
client_object =
1881
client))
2709
2710
GLib.io_add_watch(
2711
parent_pipe.fileno(),
2712
GLib.IO_IN | GLib.IO_HUP,
2713
functools.partial(self.handle_ipc,
2714
parent_pipe=parent_pipe,
2715
proc=proc,
2716
client_object=client))
1882
2717
parent_pipe.send(True)
1883
2718
# remove the old hook in favor of the new above hook on
1884
2719
# same fileno
1887
2722
funcname = request[1]
1888
2723
args = request[2]
1889
2724
kwargs = request[3]
1890
2725
1891
2726
parent_pipe.send(('data', getattr(client_object,
1892
2727
funcname)(*args,
1893
**kwargs)))
1894
2728
**kwargs)))
2729
1895
2730
if command == 'getattr':
1896
2731
attrname = request[1]
1897
if callable(client_object.__getattribute__(attrname)):
1898
parent_pipe.send(('function',))
2732
if isinstance(client_object.__getattribute__(attrname),
2733
collections.Callable):
2734
parent_pipe.send(('function', ))
1899
2735
else:
1900
parent_pipe.send(('data', client_object
1901
.__getattribute__(attrname)))
1902
2736
parent_pipe.send((
2737
'data', client_object.__getattribute__(attrname)))
2738
1903
2739
if command == 'setattr':
1904
2740
attrname = request[1]
1905
2741
value = request[2]
1906
2742
setattr(client_object, attrname, value)
1907
2743
1908
2744
return True
1909
2745
1910
2746
2747
def rfc3339_duration_to_delta(duration):
2748
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2749
2750
>>> rfc3339_duration_to_delta("P7D")
2751
datetime.timedelta(7)
2752
>>> rfc3339_duration_to_delta("PT60S")
2753
datetime.timedelta(0, 60)
2754
>>> rfc3339_duration_to_delta("PT60M")
2755
datetime.timedelta(0, 3600)
2756
>>> rfc3339_duration_to_delta("PT24H")
2757
datetime.timedelta(1)
2758
>>> rfc3339_duration_to_delta("P1W")
2759
datetime.timedelta(7)
2760
>>> rfc3339_duration_to_delta("PT5M30S")
2761
datetime.timedelta(0, 330)
2762
>>> rfc3339_duration_to_delta("P1DT3M20S")
2763
datetime.timedelta(1, 200)
2764
"""
2765
2766
# Parsing an RFC 3339 duration with regular expressions is not
2767
# possible - there would have to be multiple places for the same
2768
# values, like seconds. The current code, while more esoteric, is
2769
# cleaner without depending on a parsing library. If Python had a
2770
# built-in library for parsing we would use it, but we'd like to
2771
# avoid excessive use of external libraries.
2772
2773
# New type for defining tokens, syntax, and semantics all-in-one
2774
Token = collections.namedtuple("Token", (
2775
"regexp", # To match token; if "value" is not None, must have
2776
# a "group" containing digits
2777
"value", # datetime.timedelta or None
2778
"followers")) # Tokens valid after this token
2779
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2780
# the "duration" ABNF definition in RFC 3339, Appendix A.
2781
token_end = Token(re.compile(r"$"), None, frozenset())
2782
token_second = Token(re.compile(r"(\d+)S"),
2783
datetime.timedelta(seconds=1),
2784
frozenset((token_end, )))
2785
token_minute = Token(re.compile(r"(\d+)M"),
2786
datetime.timedelta(minutes=1),
2787
frozenset((token_second, token_end)))
2788
token_hour = Token(re.compile(r"(\d+)H"),
2789
datetime.timedelta(hours=1),
2790
frozenset((token_minute, token_end)))
2791
token_time = Token(re.compile(r"T"),
2792
None,
2793
frozenset((token_hour, token_minute,
2794
token_second)))
2795
token_day = Token(re.compile(r"(\d+)D"),
2796
datetime.timedelta(days=1),
2797
frozenset((token_time, token_end)))
2798
token_month = Token(re.compile(r"(\d+)M"),
2799
datetime.timedelta(weeks=4),
2800
frozenset((token_day, token_end)))
2801
token_year = Token(re.compile(r"(\d+)Y"),
2802
datetime.timedelta(weeks=52),
2803
frozenset((token_month, token_end)))
2804
token_week = Token(re.compile(r"(\d+)W"),
2805
datetime.timedelta(weeks=1),
2806
frozenset((token_end, )))
2807
token_duration = Token(re.compile(r"P"), None,
2808
frozenset((token_year, token_month,
2809
token_day, token_time,
2810
token_week)))
2811
# Define starting values:
2812
# Value so far
2813
value = datetime.timedelta()
2814
found_token = None
2815
# Following valid tokens
2816
followers = frozenset((token_duration, ))
2817
# String left to parse
2818
s = duration
2819
# Loop until end token is found
2820
while found_token is not token_end:
2821
# Search for any currently valid tokens
2822
for token in followers:
2823
match = token.regexp.match(s)
2824
if match is not None:
2825
# Token found
2826
if token.value is not None:
2827
# Value found, parse digits
2828
factor = int(match.group(1), 10)
2829
# Add to value so far
2830
value += factor * token.value
2831
# Strip token from string
2832
s = token.regexp.sub("", s, 1)
2833
# Go to found token
2834
found_token = token
2835
# Set valid next tokens
2836
followers = found_token.followers
2837
break
2838
else:
2839
# No currently valid tokens were found
2840
raise ValueError("Invalid RFC 3339 duration: {!r}"
2841
.format(duration))
2842
# End token found
2843
return value
2844
2845
1911
2846
def string_to_delta(interval):
1912
2847
"""Parse a string and return a datetime.timedelta
1913
2848
1914
2849
>>> string_to_delta('7d')
1915
2850
datetime.timedelta(7)
1916
2851
>>> string_to_delta('60s')
1924
2859
>>> string_to_delta('5m 30s')
1925
2860
datetime.timedelta(0, 330)
1926
2861
"""
2862
2863
try:
2864
return rfc3339_duration_to_delta(interval)
2865
except ValueError:
2866
pass
2867
1927
2868
timevalue = datetime.timedelta(0)
1928
2869
for s in interval.split():
1929
2870
try:
1930
suffix = unicode(s[-1])
2871
suffix = s[-1]
1931
2872
value = int(s[:-1])
1932
2873
if suffix == "d":
1933
2874
delta = datetime.timedelta(value)
1940
2881
elif suffix == "w":
1941
2882
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1942
2883
else:
1943
raise ValueError("Unknown suffix %r" % suffix)
1944
except (ValueError, IndexError) as e:
2884
raise ValueError("Unknown suffix {!r}".format(suffix))
2885
except IndexError as e:
1945
2886
raise ValueError(*(e.args))
1946
2887
timevalue += delta
1947
2888
return timevalue
1948
2889
1949
2890
1950
def daemon(nochdir = False, noclose = False):
2891
def daemon(nochdir=False, noclose=False):
1951
2892
"""See daemon(3). Standard BSD Unix function.
1952
2893
1953
2894
This should really exist as os.daemon, but it doesn't (yet)."""
1954
2895
if os.fork():
1955
2896
sys.exit()
1960
2901
sys.exit()
1961
2902
if not noclose:
1962
2903
# Close all standard open file descriptors
1963
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2904
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1964
2905
if not stat.S_ISCHR(os.fstat(null).st_mode):
1965
2906
raise OSError(errno.ENODEV,
1966
"%s not a character device"
1967
% os.path.devnull)
2907
"{} not a character device"
2908
.format(os.devnull))
1968
2909
os.dup2(null, sys.stdin.fileno())
1969
2910
os.dup2(null, sys.stdout.fileno())
1970
2911
os.dup2(null, sys.stderr.fileno())
1973
2914
1974
2915
1975
2916
def main():
1976
2917
1977
2918
##################################################################
1978
2919
# Parsing of options, both command line and config file
1979
2920
1980
2921
parser = argparse.ArgumentParser()
1981
2922
parser.add_argument("-v", "--version", action="version",
1982
version = "%%(prog)s %s" % version,
2923
version="%(prog)s {}".format(version),
1983
2924
help="show version number and exit")
1984
2925
parser.add_argument("-i", "--interface", metavar="IF",
1985
2926
help="Bind to interface IF")
1991
2932
help="Run self-test")
1992
2933
parser.add_argument("--debug", action="store_true",
1993
2934
help="Debug mode; run in foreground and log"
1994
" to terminal")
2935
" to terminal", default=None)
1995
2936
parser.add_argument("--debuglevel", metavar="LEVEL",
1996
2937
help="Debug level for stdout output")
1997
2938
parser.add_argument("--priority", help="GnuTLS"
2004
2945
" files")
2005
2946
parser.add_argument("--no-dbus", action="store_false",
2006
2947
dest="use_dbus", help="Do not provide D-Bus"
2007
" system bus interface")
2948
" system bus interface", default=None)
2008
2949
parser.add_argument("--no-ipv6", action="store_false",
2009
dest="use_ipv6", help="Do not use IPv6")
2950
dest="use_ipv6", help="Do not use IPv6",
2951
default=None)
2010
2952
parser.add_argument("--no-restore", action="store_false",
2011
2953
dest="restore", help="Do not restore stored"
2012
" state")
2954
" state", default=None)
2955
parser.add_argument("--socket", type=int,
2956
help="Specify a file descriptor to a network"
2957
" socket to use instead of creating one")
2013
2958
parser.add_argument("--statedir", metavar="DIR",
2014
2959
help="Directory to save/restore state in")
2015
2960
parser.add_argument("--foreground", action="store_true",
2961
help="Run in foreground", default=None)
2962
parser.add_argument("--no-zeroconf", action="store_false",
2963
dest="zeroconf", help="Do not use Zeroconf",
2964
default=None)
2965
2016
2966
options = parser.parse_args()
2017
2967
2018
2968
if options.check:
2019
2969
import doctest
2020
doctest.testmod()
2021
sys.exit()
2022
2970
fail_count, test_count = doctest.testmod()
2971
sys.exit(os.EX_OK if fail_count == 0 else 1)
2972
2023
2973
# Default values for config file for server-global settings
2024
server_defaults = { "interface": "",
2025
"address": "",
2026
"port": "",
2027
"debug": "False",
2028
"priority":
2029
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2030
"servicename": "Mandos",
2031
"use_dbus": "True",
2032
"use_ipv6": "True",
2033
"debuglevel": "",
2034
"restore": "True",
2035
"statedir": "/var/lib/mandos"
2036
}
2037
2974
if gnutls.has_rawpk:
2975
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2976
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2977
else:
2978
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2979
":+SIGN-DSA-SHA256")
2980
server_defaults = {"interface": "",
2981
"address": "",
2982
"port": "",
2983
"debug": "False",
2984
"priority": priority,
2985
"servicename": "Mandos",
2986
"use_dbus": "True",
2987
"use_ipv6": "True",
2988
"debuglevel": "",
2989
"restore": "True",
2990
"socket": "",
2991
"statedir": "/var/lib/mandos",
2992
"foreground": "False",
2993
"zeroconf": "True",
2994
}
2995
del priority
2996
2038
2997
# Parse config file for server-global settings
2039
2998
server_config = configparser.SafeConfigParser(server_defaults)
2040
2999
del server_defaults
2041
server_config.read(os.path.join(options.configdir,
2042
"mandos.conf"))
3000
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2043
3001
# Convert the SafeConfigParser object to a dict
2044
3002
server_settings = server_config.defaults()
2045
3003
# Use the appropriate methods on the non-string config options
2046
for option in ("debug", "use_dbus", "use_ipv6"):
3004
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3005
"foreground", "zeroconf"):
2047
3006
server_settings[option] = server_config.getboolean("DEFAULT",
2048
3007
option)
2049
3008
if server_settings["port"]:
2050
3009
server_settings["port"] = server_config.getint("DEFAULT",
2051
3010
"port")
3011
if server_settings["socket"]:
3012
server_settings["socket"] = server_config.getint("DEFAULT",
3013
"socket")
3014
# Later, stdin will, and stdout and stderr might, be dup'ed
3015
# over with an opened os.devnull. But we don't want this to
3016
# happen with a supplied network socket.
3017
if 0 <= server_settings["socket"] <= 2:
3018
server_settings["socket"] = os.dup(server_settings
3019
["socket"])
2052
3020
del server_config
2053
3021
2054
3022
# Override the settings from the config file with command line
2055
3023
# options, if set.
2056
3024
for option in ("interface", "address", "port", "debug",
2057
"priority", "servicename", "configdir",
2058
"use_dbus", "use_ipv6", "debuglevel", "restore",
2059
"statedir"):
3025
"priority", "servicename", "configdir", "use_dbus",
3026
"use_ipv6", "debuglevel", "restore", "statedir",
3027
"socket", "foreground", "zeroconf"):
2060
3028
value = getattr(options, option)
2061
3029
if value is not None:
2062
3030
server_settings[option] = value
2063
3031
del options
2064
3032
# Force all strings to be unicode
2065
3033
for option in server_settings.keys():
2066
if type(server_settings[option]) is str:
2067
server_settings[option] = unicode(server_settings[option])
3034
if isinstance(server_settings[option], bytes):
3035
server_settings[option] = (server_settings[option]
3036
.decode("utf-8"))
3037
# Force all boolean options to be boolean
3038
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3039
"foreground", "zeroconf"):
3040
server_settings[option] = bool(server_settings[option])
3041
# Debug implies foreground
3042
if server_settings["debug"]:
3043
server_settings["foreground"] = True
2068
3044
# Now we have our good server settings in "server_settings"
2069
3045
2070
3046
##################################################################
2071
3047
3048
if (not server_settings["zeroconf"]
3049
and not (server_settings["port"]
3050
or server_settings["socket"] != "")):
3051
parser.error("Needs port or socket to work without Zeroconf")
3052
2072
3053
# For convenience
2073
3054
debug = server_settings["debug"]
2074
3055
debuglevel = server_settings["debuglevel"]
2076
3057
use_ipv6 = server_settings["use_ipv6"]
2077
3058
stored_state_path = os.path.join(server_settings["statedir"],
2078
3059
stored_state_file)
2079
3060
foreground = server_settings["foreground"]
3061
zeroconf = server_settings["zeroconf"]
3062
2080
3063
if debug:
2081
initlogger(logging.DEBUG)
3064
initlogger(debug, logging.DEBUG)
2082
3065
else:
2083
3066
if not debuglevel:
2084
initlogger()
3067
initlogger(debug)
2085
3068
else:
2086
3069
level = getattr(logging, debuglevel.upper())
2087
initlogger(level)
2088
3070
initlogger(debug, level)
3071
2089
3072
if server_settings["servicename"] != "Mandos":
2090
syslogger.setFormatter(logging.Formatter
2091
('Mandos (%s) [%%(process)d]:'
2092
' %%(levelname)s: %%(message)s'
2093
% server_settings["servicename"]))
2094
3073
syslogger.setFormatter(
3074
logging.Formatter('Mandos ({}) [%(process)d]:'
3075
' %(levelname)s: %(message)s'.format(
3076
server_settings["servicename"])))
3077
2095
3078
# Parse config file with clients
2096
client_config = configparser.SafeConfigParser(Client.client_defaults)
3079
client_config = configparser.SafeConfigParser(Client
3080
.client_defaults)
2097
3081
client_config.read(os.path.join(server_settings["configdir"],
2098
3082
"clients.conf"))
2099
3083
2100
3084
global mandos_dbus_service
2101
3085
mandos_dbus_service = None
2102
2103
tcp_server = MandosServer((server_settings["address"],
2104
server_settings["port"]),
2105
ClientHandler,
2106
interface=(server_settings["interface"]
2107
or None),
2108
use_ipv6=use_ipv6,
2109
gnutls_priority=
2110
server_settings["priority"],
2111
use_dbus=use_dbus)
2112
if not debug:
2113
pidfilename = "/var/run/mandos.pid"
2114
try:
2115
pidfile = open(pidfilename, "w")
2116
except IOError:
2117
logger.error("Could not open file %r", pidfilename)
2118
2119
try:
2120
uid = pwd.getpwnam("_mandos").pw_uid
2121
gid = pwd.getpwnam("_mandos").pw_gid
2122
except KeyError:
2123
try:
2124
uid = pwd.getpwnam("mandos").pw_uid
2125
gid = pwd.getpwnam("mandos").pw_gid
3086
3087
socketfd = None
3088
if server_settings["socket"] != "":
3089
socketfd = server_settings["socket"]
3090
tcp_server = MandosServer(
3091
(server_settings["address"], server_settings["port"]),
3092
ClientHandler,
3093
interface=(server_settings["interface"] or None),
3094
use_ipv6=use_ipv6,
3095
gnutls_priority=server_settings["priority"],
3096
use_dbus=use_dbus,
3097
socketfd=socketfd)
3098
if not foreground:
3099
pidfilename = "/run/mandos.pid"
3100
if not os.path.isdir("/run/."):
3101
pidfilename = "/var/run/mandos.pid"
3102
pidfile = None
3103
try:
3104
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3105
except IOError as e:
3106
logger.error("Could not open file %r", pidfilename,
3107
exc_info=e)
3108
3109
for name, group in (("_mandos", "_mandos"),
3110
("mandos", "mandos"),
3111
("nobody", "nogroup")):
3112
try:
3113
uid = pwd.getpwnam(name).pw_uid
3114
gid = pwd.getpwnam(group).pw_gid
3115
break
2126
3116
except KeyError:
2127
try:
2128
uid = pwd.getpwnam("nobody").pw_uid
2129
gid = pwd.getpwnam("nobody").pw_gid
2130
except KeyError:
2131
uid = 65534
2132
gid = 65534
3117
continue
3118
else:
3119
uid = 65534
3120
gid = 65534
2133
3121
try:
2134
3122
os.setgid(gid)
2135
3123
os.setuid(uid)
3124
if debug:
3125
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3126
gid))
2136
3127
except OSError as error:
2137
if error[0] != errno.EPERM:
2138
raise error
2139
3128
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3129
.format(uid, gid, os.strerror(error.errno)))
3130
if error.errno != errno.EPERM:
3131
raise
3132
2140
3133
if debug:
2141
3134
# Enable all possible GnuTLS debugging
2142
3135
2143
3136
# "Use a log level over 10 to enable all debugging options."
2144
3137
# - GnuTLS manual
2145
gnutls.library.functions.gnutls_global_set_log_level(11)
2146
2147
@gnutls.library.types.gnutls_log_func
3138
gnutls.global_set_log_level(11)
3139
3140
@gnutls.log_func
2148
3141
def debug_gnutls(level, string):
2149
3142
logger.debug("GnuTLS: %s", string[:-1])
2150
2151
(gnutls.library.functions
2152
.gnutls_global_set_log_function(debug_gnutls))
2153
3143
3144
gnutls.global_set_log_function(debug_gnutls)
3145
2154
3146
# Redirect stdin so all checkers get /dev/null
2155
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3147
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2156
3148
os.dup2(null, sys.stdin.fileno())
2157
3149
if null > 2:
2158
3150
os.close(null)
2159
else:
2160
# No console logging
2161
logger.removeHandler(console)
2162
3151
2163
3152
# Need to fork before connecting to D-Bus
2164
if not debug:
3153
if not foreground:
2165
3154
# Close all input and output, do double fork, etc.
2166
3155
daemon()
2167
2168
gobject.threads_init()
2169
3156
3157
# multiprocessing will use threads, so before we use GLib we need
3158
# to inform GLib that threads will be used.
3159
GLib.threads_init()
3160
2170
3161
global main_loop
2171
3162
# From the Avahi example code
2172
DBusGMainLoop(set_as_default=True )
2173
main_loop = gobject.MainLoop()
3163
DBusGMainLoop(set_as_default=True)
3164
main_loop = GLib.MainLoop()
2174
3165
bus = dbus.SystemBus()
2175
3166
# End of Avahi example code
2176
3167
if use_dbus:
2177
3168
try:
2178
3169
bus_name = dbus.service.BusName("se.recompile.Mandos",
2179
bus, do_not_queue=True)
2180
old_bus_name = (dbus.service.BusName
2181
("se.bsnet.fukt.Mandos", bus,
2182
do_not_queue=True))
2183
except dbus.exceptions.NameExistsException as e:
2184
logger.error(unicode(e) + ", disabling D-Bus")
3170
bus,
3171
do_not_queue=True)
3172
old_bus_name = dbus.service.BusName(
3173
"se.bsnet.fukt.Mandos", bus,
3174
do_not_queue=True)
3175
except dbus.exceptions.DBusException as e:
3176
logger.error("Disabling D-Bus:", exc_info=e)
2185
3177
use_dbus = False
2186
3178
server_settings["use_dbus"] = False
2187
3179
tcp_server.use_dbus = False
2188
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2189
service = AvahiServiceToSyslog(name =
2190
server_settings["servicename"],
2191
servicetype = "_mandos._tcp",
2192
protocol = protocol, bus = bus)
2193
if server_settings["interface"]:
2194
service.interface = (if_nametoindex
2195
(str(server_settings["interface"])))
2196
3180
if zeroconf:
3181
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3182
service = AvahiServiceToSyslog(
3183
name=server_settings["servicename"],
3184
servicetype="_mandos._tcp",
3185
protocol=protocol,
3186
bus=bus)
3187
if server_settings["interface"]:
3188
service.interface = if_nametoindex(
3189
server_settings["interface"].encode("utf-8"))
3190
2197
3191
global multiprocessing_manager
2198
3192
multiprocessing_manager = multiprocessing.Manager()
2199
3193
2200
3194
client_class = Client
2201
3195
if use_dbus:
2202
client_class = functools.partial(ClientDBusTransitional,
2203
bus = bus)
2204
3196
client_class = functools.partial(ClientDBus, bus=bus)
3197
2205
3198
client_settings = Client.config_parser(client_config)
2206
3199
old_client_settings = {}
2207
3200
clients_data = {}
2208
3201
3202
# This is used to redirect stdout and stderr for checker processes
3203
global wnull
3204
wnull = open(os.devnull, "w") # A writable /dev/null
3205
# Only used if server is running in foreground but not in debug
3206
# mode
3207
if debug or not foreground:
3208
wnull.close()
3209
2209
3210
# Get client data and settings from last running state.
2210
3211
if server_settings["restore"]:
2211
3212
try:
2212
3213
with open(stored_state_path, "rb") as stored_state:
2213
clients_data, old_client_settings = (pickle.load
2214
(stored_state))
3214
if sys.version_info.major == 2:
3215
clients_data, old_client_settings = pickle.load(
3216
stored_state)
3217
else:
3218
bytes_clients_data, bytes_old_client_settings = (
3219
pickle.load(stored_state, encoding="bytes"))
3220
# Fix bytes to strings
3221
# clients_data
3222
# .keys()
3223
clients_data = {(key.decode("utf-8")
3224
if isinstance(key, bytes)
3225
else key): value
3226
for key, value in
3227
bytes_clients_data.items()}
3228
del bytes_clients_data
3229
for key in clients_data:
3230
value = {(k.decode("utf-8")
3231
if isinstance(k, bytes) else k): v
3232
for k, v in
3233
clients_data[key].items()}
3234
clients_data[key] = value
3235
# .client_structure
3236
value["client_structure"] = [
3237
(s.decode("utf-8")
3238
if isinstance(s, bytes)
3239
else s) for s in
3240
value["client_structure"]]
3241
# .name & .host
3242
for k in ("name", "host"):
3243
if isinstance(value[k], bytes):
3244
value[k] = value[k].decode("utf-8")
3245
if not value.has_key("key_id"):
3246
value["key_id"] = ""
3247
elif not value.has_key("fingerprint"):
3248
value["fingerprint"] = ""
3249
# old_client_settings
3250
# .keys()
3251
old_client_settings = {
3252
(key.decode("utf-8")
3253
if isinstance(key, bytes)
3254
else key): value
3255
for key, value in
3256
bytes_old_client_settings.items()}
3257
del bytes_old_client_settings
3258
# .host
3259
for value in old_client_settings.values():
3260
if isinstance(value["host"], bytes):
3261
value["host"] = (value["host"]
3262
.decode("utf-8"))
2215
3263
os.remove(stored_state_path)
2216
3264
except IOError as e:
2217
logger.warning("Could not load persistent state: {0}"
2218
.format(e))
2219
if e.errno != errno.ENOENT:
3265
if e.errno == errno.ENOENT:
3266
logger.warning("Could not load persistent state:"
3267
" {}".format(os.strerror(e.errno)))
3268
else:
3269
logger.critical("Could not load persistent state:",
3270
exc_info=e)
2220
3271
raise
2221
3272
except EOFError as e:
3273
logger.warning("Could not load persistent state: "
3274
"EOFError:",
3275
exc_info=e)
3276
2222
3277
with PGPEngine() as pgp:
2223
for client_name, client in clients_data.iteritems():
3278
for client_name, client in clients_data.items():
3279
# Skip removed clients
3280
if client_name not in client_settings:
3281
continue
3282
2224
3283
# Decide which value to use after restoring saved state.
2225
3284
# We have three different values: Old config file,
2226
3285
# new config file, and saved state.
2231
3290
# For each value in new config, check if it
2232
3291
# differs from the old config value (Except for
2233
3292
# the "secret" attribute)
2234
if (name != "secret" and
2235
value != old_client_settings[client_name]
2236
[name]):
3293
if (name != "secret"
3294
and (value !=
3295
old_client_settings[client_name][name])):
2237
3296
client[name] = value
2238
3297
except KeyError:
2239
3298
pass
2240
3299
2241
3300
# Clients who has passed its expire date can still be
2242
# enabled if its last checker was successful. Clients
2243
# whose checker failed before we stored its state is
2244
# assumed to have failed all checkers during downtime.
3301
# enabled if its last checker was successful. A Client
3302
# whose checker succeeded before we stored its state is
3303
# assumed to have successfully run all checkers during
3304
# downtime.
2245
3305
if client["enabled"]:
2246
3306
if datetime.datetime.utcnow() >= client["expires"]:
2247
3307
if not client["last_checked_ok"]:
2248
3308
logger.warning(
2249
"disabling client {0} - Client never "
2250
"performed a successfull checker"
2251
.format(client["name"]))
3309
"disabling client {} - Client never "
3310
"performed a successful checker".format(
3311
client_name))
2252
3312
client["enabled"] = False
2253
3313
elif client["last_checker_status"] != 0:
2254
3314
logger.warning(
2255
"disabling client {0} - Client "
2256
"last checker failed with error code {1}"
2257
.format(client["name"],
2258
client["last_checker_status"]))
3315
"disabling client {} - Client last"
3316
" checker failed with error code"
3317
" {}".format(
3318
client_name,
3319
client["last_checker_status"]))
2259
3320
client["enabled"] = False
2260
3321
else:
2261
client["expires"] = (datetime.datetime
2262
.utcnow()
2263
+ client["timeout"])
2264
3322
client["expires"] = (
3323
datetime.datetime.utcnow()
3324
+ client["timeout"])
3325
logger.debug("Last checker succeeded,"
3326
" keeping {} enabled".format(
3327
client_name))
2265
3328
try:
2266
client["secret"] = (
2267
pgp.decrypt(client["encrypted_secret"],
2268
client_settings[client_name]
2269
["secret"]))
3329
client["secret"] = pgp.decrypt(
3330
client["encrypted_secret"],
3331
client_settings[client_name]["secret"])
2270
3332
except PGPError:
2271
3333
# If decryption fails, we use secret from new settings
2272
logger.debug("Failed to decrypt {0} old secret"
2273
.format(client_name))
2274
client["secret"] = (
2275
client_settings[client_name]["secret"])
3334
logger.debug("Failed to decrypt {} old secret".format(
3335
client_name))
3336
client["secret"] = (client_settings[client_name]
3337
["secret"])
2276
3338
2277
2278
3339
# Add/remove clients based on new changes made to config
2279
for client_name in set(old_client_settings) - set(client_settings):
3340
for client_name in (set(old_client_settings)
3341
- set(client_settings)):
2280
3342
del clients_data[client_name]
2281
for client_name in set(client_settings) - set(old_client_settings):
3343
for client_name in (set(client_settings)
3344
- set(old_client_settings)):
2282
3345
clients_data[client_name] = client_settings[client_name]
2283
3346
2284
# Create clients all clients
2285
for client_name, client in clients_data.iteritems():
3347
# Create all client objects
3348
for client_name, client in clients_data.items():
2286
3349
tcp_server.clients[client_name] = client_class(
2287
name = client_name, settings = client)
2288
3350
name=client_name,
3351
settings=client,
3352
server_settings=server_settings)
3353
2289
3354
if not tcp_server.clients:
2290
3355
logger.warning("No clients defined")
2291
2292
if not debug:
2293
try:
2294
with pidfile:
2295
pid = os.getpid()
2296
pidfile.write(str(pid) + "\n".encode("utf-8"))
2297
del pidfile
2298
except IOError:
2299
logger.error("Could not write to file %r with PID %d",
2300
pidfilename, pid)
2301
except NameError:
2302
# "pidfile" was never created
2303
pass
3356
3357
if not foreground:
3358
if pidfile is not None:
3359
pid = os.getpid()
3360
try:
3361
with pidfile:
3362
print(pid, file=pidfile)
3363
except IOError:
3364
logger.error("Could not write to file %r with PID %d",
3365
pidfilename, pid)
3366
del pidfile
2304
3367
del pidfilename
2305
signal.signal(signal.SIGINT, signal.SIG_IGN)
2306
2307
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2308
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2309
3368
3369
for termsig in (signal.SIGHUP, signal.SIGTERM):
3370
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3371
lambda: main_loop.quit() and False)
3372
2310
3373
if use_dbus:
2311
class MandosDBusService(dbus.service.Object):
3374
3375
@alternate_dbus_interfaces(
3376
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3377
class MandosDBusService(DBusObjectWithObjectManager):
2312
3378
"""A D-Bus proxy object"""
3379
2313
3380
def __init__(self):
2314
3381
dbus.service.Object.__init__(self, bus, "/")
3382
2315
3383
_interface = "se.recompile.Mandos"
2316
3384
2317
3385
@dbus.service.signal(_interface, signature="o")
2318
3386
def ClientAdded(self, objpath):
2319
3387
"D-Bus signal"
2320
3388
pass
2321
3389
2322
3390
@dbus.service.signal(_interface, signature="ss")
2323
def ClientNotFound(self, fingerprint, address):
3391
def ClientNotFound(self, key_id, address):
2324
3392
"D-Bus signal"
2325
3393
pass
2326
3394
3395
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3396
"true"})
2327
3397
@dbus.service.signal(_interface, signature="os")
2328
3398
def ClientRemoved(self, objpath, name):
2329
3399
"D-Bus signal"
2330
3400
pass
2331
3401
3402
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3403
"true"})
2332
3404
@dbus.service.method(_interface, out_signature="ao")
2333
3405
def GetAllClients(self):
2334
3406
"D-Bus method"
2335
return dbus.Array(c.dbus_object_path
2336
for c in
2337
tcp_server.clients.itervalues())
2338
3407
return dbus.Array(c.dbus_object_path for c in
3408
tcp_server.clients.values())
3409
3410
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3411
"true"})
2339
3412
@dbus.service.method(_interface,
2340
3413
out_signature="a{oa{sv}}")
2341
3414
def GetAllClientsWithProperties(self):
2342
3415
"D-Bus method"
2343
3416
return dbus.Dictionary(
2344
((c.dbus_object_path, c.GetAll(""))
2345
for c in tcp_server.clients.itervalues()),
3417
{c.dbus_object_path: c.GetAll(
3418
"se.recompile.Mandos.Client")
3419
for c in tcp_server.clients.values()},
2346
3420
signature="oa{sv}")
2347
3421
2348
3422
@dbus.service.method(_interface, in_signature="o")
2349
3423
def RemoveClient(self, object_path):
2350
3424
"D-Bus method"
2351
for c in tcp_server.clients.itervalues():
3425
for c in tcp_server.clients.values():
2352
3426
if c.dbus_object_path == object_path:
2353
3427
del tcp_server.clients[c.name]
2354
3428
c.remove_from_connection()
2355
# Don't signal anything except ClientRemoved
3429
# Don't signal the disabling
2356
3430
c.disable(quiet=True)
2357
# Emit D-Bus signal
2358
self.ClientRemoved(object_path, c.name)
3431
# Emit D-Bus signal for removal
3432
self.client_removed_signal(c)
2359
3433
return
2360
3434
raise KeyError(object_path)
2361
3435
2362
3436
del _interface
2363
2364
class MandosDBusServiceTransitional(MandosDBusService):
2365
__metaclass__ = AlternateDBusNamesMetaclass
2366
mandos_dbus_service = MandosDBusServiceTransitional()
2367
3437
3438
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3439
out_signature="a{oa{sa{sv}}}")
3440
def GetManagedObjects(self):
3441
"""D-Bus method"""
3442
return dbus.Dictionary(
3443
{client.dbus_object_path:
3444
dbus.Dictionary(
3445
{interface: client.GetAll(interface)
3446
for interface in
3447
client._get_all_interface_names()})
3448
for client in tcp_server.clients.values()})
3449
3450
def client_added_signal(self, client):
3451
"""Send the new standard signal and the old signal"""
3452
if use_dbus:
3453
# New standard signal
3454
self.InterfacesAdded(
3455
client.dbus_object_path,
3456
dbus.Dictionary(
3457
{interface: client.GetAll(interface)
3458
for interface in
3459
client._get_all_interface_names()}))
3460
# Old signal
3461
self.ClientAdded(client.dbus_object_path)
3462
3463
def client_removed_signal(self, client):
3464
"""Send the new standard signal and the old signal"""
3465
if use_dbus:
3466
# New standard signal
3467
self.InterfacesRemoved(
3468
client.dbus_object_path,
3469
client._get_all_interface_names())
3470
# Old signal
3471
self.ClientRemoved(client.dbus_object_path,
3472
client.name)
3473
3474
mandos_dbus_service = MandosDBusService()
3475
3476
# Save modules to variables to exempt the modules from being
3477
# unloaded before the function registered with atexit() is run.
3478
mp = multiprocessing
3479
wn = wnull
3480
2368
3481
def cleanup():
2369
3482
"Cleanup function; run on exit"
2370
service.cleanup()
2371
2372
multiprocessing.active_children()
3483
if zeroconf:
3484
service.cleanup()
3485
3486
mp.active_children()
3487
wn.close()
2373
3488
if not (tcp_server.clients or client_settings):
2374
3489
return
2375
3490
2376
3491
# Store client before exiting. Secrets are encrypted with key
2377
3492
# based on what config file has. If config file is
2378
3493
# removed/edited, old secret will thus be unrecovable.
2379
3494
clients = {}
2380
3495
with PGPEngine() as pgp:
2381
for client in tcp_server.clients.itervalues():
3496
for client in tcp_server.clients.values():
2382
3497
key = client_settings[client.name]["secret"]
2383
3498
client.encrypted_secret = pgp.encrypt(client.secret,
2384
3499
key)
2385
3500
client_dict = {}
2386
3501
2387
3502
# A list of attributes that can not be pickled
2388
3503
# + secret.
2389
exclude = set(("bus", "changedstate", "secret",
2390
"checker"))
2391
for name, typ in (inspect.getmembers
2392
(dbus.service.Object)):
3504
exclude = {"bus", "changedstate", "secret",
3505
"checker", "server_settings"}
3506
for name, typ in inspect.getmembers(dbus.service
3507
.Object):
2393
3508
exclude.add(name)
2394
3509
2395
3510
client_dict["encrypted_secret"] = (client
2396
3511
.encrypted_secret)
2397
3512
for attr in client.client_structure:
2398
3513
if attr not in exclude:
2399
3514
client_dict[attr] = getattr(client, attr)
2400
3515
2401
3516
clients[client.name] = client_dict
2402
3517
del client_settings[client.name]["secret"]
2403
3518
2404
3519
try:
2405
with os.fdopen(os.open(stored_state_path,
2406
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2407
0600), "wb") as stored_state:
2408
pickle.dump((clients, client_settings), stored_state)
3520
with tempfile.NamedTemporaryFile(
3521
mode='wb',
3522
suffix=".pickle",
3523
prefix='clients-',
3524
dir=os.path.dirname(stored_state_path),
3525
delete=False) as stored_state:
3526
pickle.dump((clients, client_settings), stored_state,
3527
protocol=2)
3528
tempname = stored_state.name
3529
os.rename(tempname, stored_state_path)
2409
3530
except (IOError, OSError) as e:
2410
logger.warning("Could not save persistent state: {0}"
2411
.format(e))
2412
if e.errno not in (errno.ENOENT, errno.EACCES):
3531
if not debug:
3532
try:
3533
os.remove(tempname)
3534
except NameError:
3535
pass
3536
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3537
logger.warning("Could not save persistent state: {}"
3538
.format(os.strerror(e.errno)))
3539
else:
3540
logger.warning("Could not save persistent state:",
3541
exc_info=e)
2413
3542
raise
2414
3543
2415
3544
# Delete all clients, and settings from config
2416
3545
while tcp_server.clients:
2417
3546
name, client = tcp_server.clients.popitem()
2418
3547
if use_dbus:
2419
3548
client.remove_from_connection()
2420
# Don't signal anything except ClientRemoved
3549
# Don't signal the disabling
2421
3550
client.disable(quiet=True)
3551
# Emit D-Bus signal for removal
2422
3552
if use_dbus:
2423
# Emit D-Bus signal
2424
mandos_dbus_service.ClientRemoved(client
2425
.dbus_object_path,
2426
client.name)
3553
mandos_dbus_service.client_removed_signal(client)
2427
3554
client_settings.clear()
2428
3555
2429
3556
atexit.register(cleanup)
2430
2431
for client in tcp_server.clients.itervalues():
3557
3558
for client in tcp_server.clients.values():
2432
3559
if use_dbus:
2433
# Emit D-Bus signal
2434
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3560
# Emit D-Bus signal for adding
3561
mandos_dbus_service.client_added_signal(client)
2435
3562
# Need to initiate checking of clients
2436
3563
if client.enabled:
2437
3564
client.init_checker()
2438
3565
2439
3566
tcp_server.enable()
2440
3567
tcp_server.server_activate()
2441
3568
2442
3569
# Find out what port we got
2443
service.port = tcp_server.socket.getsockname()[1]
3570
if zeroconf:
3571
service.port = tcp_server.socket.getsockname()[1]
2444
3572
if use_ipv6:
2445
3573
logger.info("Now listening on address %r, port %d,"
2446
" flowinfo %d, scope_id %d"
2447
% tcp_server.socket.getsockname())
3574
" flowinfo %d, scope_id %d",
3575
*tcp_server.socket.getsockname())
2448
3576
else: # IPv4
2449
logger.info("Now listening on address %r, port %d"
2450
% tcp_server.socket.getsockname())
2451
2452
#service.interface = tcp_server.socket.getsockname()[3]
2453
3577
logger.info("Now listening on address %r, port %d",
3578
*tcp_server.socket.getsockname())
3579
3580
# service.interface = tcp_server.socket.getsockname()[3]
3581
2454
3582
try:
2455
# From the Avahi example code
2456
try:
2457
service.activate()
2458
except dbus.exceptions.DBusException as error:
2459
logger.critical("DBusException: %s", error)
2460
cleanup()
2461
sys.exit(1)
2462
# End of Avahi example code
2463
2464
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2465
lambda *args, **kwargs:
2466
(tcp_server.handle_request
2467
(*args[2:], **kwargs) or True))
2468
3583
if zeroconf:
3584
# From the Avahi example code
3585
try:
3586
service.activate()
3587
except dbus.exceptions.DBusException as error:
3588
logger.critical("D-Bus Exception", exc_info=error)
3589
cleanup()
3590
sys.exit(1)
3591
# End of Avahi example code
3592
3593
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3594
lambda *args, **kwargs:
3595
(tcp_server.handle_request
3596
(*args[2:], **kwargs) or True))
3597
2469
3598
logger.debug("Starting main loop")
2470
3599
main_loop.run()
2471
3600
except AvahiError as error:
2472
logger.critical("AvahiError: %s", error)
3601
logger.critical("Avahi Error", exc_info=error)
2473
3602
cleanup()
2474
3603
sys.exit(1)
2475
3604
except KeyboardInterrupt:
2480
3609
# Must run before the D-Bus bus name gets deregistered
2481
3610
cleanup()
2482
3611
3612
2483
3613
if __name__ == '__main__':
2484
3614
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0