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- Committer: Teddy Hogeborn
- Date: 2019-08-05 14:31:51 UTC
- Revision ID: teddy@recompile.se-20190805143151-lt5d97wqif3t8250
Client: Debian package fix: Make uninstall when using dracut(8) work
Use the same logic to rebuild the initramfs image when uninstalling as
when installing the package.
* debian/mandos-client.postrm (update_initramfs): Use the same logic
as the update_initramfs function in debian/mandos-client.postinst.
Use the same logic to rebuild the initramfs image when uninstalling as
when installing the package.
* debian/mandos-client.postrm (update_initramfs): Use the same logic
as the update_initramfs function in debian/mandos-client.postinst.
- files added:
- bugs.xml
- debian/tests
- debian/upstream
- dracut-module
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
5
#
5
#
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
14
# Copyright © 2008-2019 Teddy Hogeborn
15
# Copyright © 2008-2019 Björn Påhlsson
16
#
17
# This file is part of Mandos.
18
#
19
# Mandos is free software: you can redistribute it and/or modify it
20
# under the terms of the GNU General Public License as published by
19
21
# the Free Software Foundation, either version 3 of the License, or
20
22
# (at your option) any later version.
21
23
#
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
24
26
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
27
# GNU General Public License for more details.
26
#
28
#
27
29
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
31
32
# Contact the authors at <mandos@recompile.se>.
32
#
33
#
33
34
34
35
from __future__ import (division, absolute_import, print_function,
35
36
unicode_literals)
36
37
37
import SocketServer as socketserver
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
38
47
import socket
39
48
import argparse
40
49
import datetime
41
50
import errno
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
49
55
import sys
50
56
import re
51
57
import os
60
66
import struct
61
67
import fcntl
62
68
import functools
63
import cPickle as pickle
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
64
73
import multiprocessing
65
74
import types
66
75
import binascii
67
76
import tempfile
77
import itertools
78
import collections
79
import codecs
68
80
69
81
import dbus
70
82
import dbus.service
71
import gobject
72
import avahi
83
import gi
84
from gi.repository import GLib
73
85
from dbus.mainloop.glib import DBusGMainLoop
74
86
import ctypes
75
87
import ctypes.util
76
88
import xml.dom.minidom
77
89
import inspect
78
import GnuPGInterface
79
90
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# Try to find the value of SO_BINDTODEVICE:
80
92
try:
93
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
94
# newer, and it is also the most natural place for it:
81
95
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
82
96
except AttributeError:
83
97
try:
98
# This is where SO_BINDTODEVICE was up to and including Python
99
# 2.6, and also 3.2:
84
100
from IN import SO_BINDTODEVICE
85
101
except ImportError:
86
SO_BINDTODEVICE = None
87
88
version = "1.4.1"
102
# In Python 2.7 it seems to have been removed entirely.
103
# Try running the C preprocessor:
104
try:
105
cc = subprocess.Popen(["cc", "--language=c", "-E",
106
"/dev/stdin"],
107
stdin=subprocess.PIPE,
108
stdout=subprocess.PIPE)
109
stdout = cc.communicate(
110
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
111
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
112
except (OSError, ValueError, IndexError):
113
# No value found
114
SO_BINDTODEVICE = None
115
116
if sys.version_info.major == 2:
117
str = unicode
118
119
if sys.version_info < (3, 2):
120
configparser.Configparser = configparser.SafeConfigParser
121
122
version = "1.8.6"
89
123
stored_state_file = "clients.pickle"
90
124
91
125
logger = logging.getLogger()
92
syslogger = (logging.handlers.SysLogHandler
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
126
syslogger = None
95
127
96
128
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
129
if_nametoindex = ctypes.cdll.LoadLibrary(
130
ctypes.util.find_library("c")).if_nametoindex
100
131
except (OSError, AttributeError):
132
101
133
def if_nametoindex(interface):
102
134
"Get an interface index the hard way, i.e. using fcntl()"
103
135
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
136
with contextlib.closing(socket.socket()) as s:
105
137
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
138
struct.pack(b"16s16x", interface))
139
interface_index = struct.unpack("I", ifreq[16:20])[0]
110
140
return interface_index
111
141
112
142
143
def copy_function(func):
144
"""Make a copy of a function"""
145
if sys.version_info.major == 2:
146
return types.FunctionType(func.func_code,
147
func.func_globals,
148
func.func_name,
149
func.func_defaults,
150
func.func_closure)
151
else:
152
return types.FunctionType(func.__code__,
153
func.__globals__,
154
func.__name__,
155
func.__defaults__,
156
func.__closure__)
157
158
113
159
def initlogger(debug, level=logging.WARNING):
114
160
"""init logger and add loglevel"""
115
161
162
global syslogger
163
syslogger = (logging.handlers.SysLogHandler(
164
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
165
address="/dev/log"))
116
166
syslogger.setFormatter(logging.Formatter
117
167
('Mandos [%(process)d]: %(levelname)s:'
118
168
' %(message)s'))
119
169
logger.addHandler(syslogger)
120
170
121
171
if debug:
122
172
console = logging.StreamHandler()
123
173
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
135
185
136
186
class PGPEngine(object):
137
187
"""A simple class for OpenPGP symmetric encryption & decryption"""
188
138
189
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
140
190
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
141
self.gnupg = GnuPGInterface.GnuPG()
142
self.gnupg.options.meta_interactive = False
143
self.gnupg.options.homedir = self.tempdir
144
self.gnupg.options.extra_args.extend(['--force-mdc',
145
'--quiet'])
146
191
self.gpg = "gpg"
192
try:
193
output = subprocess.check_output(["gpgconf"])
194
for line in output.splitlines():
195
name, text, path = line.split(b":")
196
if name == "gpg":
197
self.gpg = path
198
break
199
except OSError as e:
200
if e.errno != errno.ENOENT:
201
raise
202
self.gnupgargs = ['--batch',
203
'--homedir', self.tempdir,
204
'--force-mdc',
205
'--quiet']
206
# Only GPG version 1 has the --no-use-agent option.
207
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
208
self.gnupgargs.append("--no-use-agent")
209
147
210
def __enter__(self):
148
211
return self
149
150
def __exit__ (self, exc_type, exc_value, traceback):
212
213
def __exit__(self, exc_type, exc_value, traceback):
151
214
self._cleanup()
152
215
return False
153
216
154
217
def __del__(self):
155
218
self._cleanup()
156
219
157
220
def _cleanup(self):
158
221
if self.tempdir is not None:
159
222
# Delete contents of tempdir
160
223
for root, dirs, files in os.walk(self.tempdir,
161
topdown = False):
224
topdown=False):
162
225
for filename in files:
163
226
os.remove(os.path.join(root, filename))
164
227
for dirname in dirs:
166
229
# Remove tempdir
167
230
os.rmdir(self.tempdir)
168
231
self.tempdir = None
169
232
170
233
def password_encode(self, password):
171
234
# Passphrase can not be empty and can not contain newlines or
172
235
# NUL bytes. So we prefix it and hex encode it.
173
return b"mandos" + binascii.hexlify(password)
174
236
encoded = b"mandos" + binascii.hexlify(password)
237
if len(encoded) > 2048:
238
# GnuPG can't handle long passwords, so encode differently
239
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
240
.replace(b"\n", b"\\n")
241
.replace(b"\0", b"\\x00"))
242
return encoded
243
175
244
def encrypt(self, data, password):
176
self.gnupg.passphrase = self.password_encode(password)
177
with open(os.devnull) as devnull:
178
try:
179
proc = self.gnupg.run(['--symmetric'],
180
create_fhs=['stdin', 'stdout'],
181
attach_fhs={'stderr': devnull})
182
with contextlib.closing(proc.handles['stdin']) as f:
183
f.write(data)
184
with contextlib.closing(proc.handles['stdout']) as f:
185
ciphertext = f.read()
186
proc.wait()
187
except IOError as e:
188
raise PGPError(e)
189
self.gnupg.passphrase = None
245
passphrase = self.password_encode(password)
246
with tempfile.NamedTemporaryFile(
247
dir=self.tempdir) as passfile:
248
passfile.write(passphrase)
249
passfile.flush()
250
proc = subprocess.Popen([self.gpg, '--symmetric',
251
'--passphrase-file',
252
passfile.name]
253
+ self.gnupgargs,
254
stdin=subprocess.PIPE,
255
stdout=subprocess.PIPE,
256
stderr=subprocess.PIPE)
257
ciphertext, err = proc.communicate(input=data)
258
if proc.returncode != 0:
259
raise PGPError(err)
190
260
return ciphertext
191
261
192
262
def decrypt(self, data, password):
193
self.gnupg.passphrase = self.password_encode(password)
194
with open(os.devnull) as devnull:
195
try:
196
proc = self.gnupg.run(['--decrypt'],
197
create_fhs=['stdin', 'stdout'],
198
attach_fhs={'stderr': devnull})
199
with contextlib.closing(proc.handles['stdin'] ) as f:
200
f.write(data)
201
with contextlib.closing(proc.handles['stdout']) as f:
202
decrypted_plaintext = f.read()
203
proc.wait()
204
except IOError as e:
205
raise PGPError(e)
206
self.gnupg.passphrase = None
263
passphrase = self.password_encode(password)
264
with tempfile.NamedTemporaryFile(
265
dir=self.tempdir) as passfile:
266
passfile.write(passphrase)
267
passfile.flush()
268
proc = subprocess.Popen([self.gpg, '--decrypt',
269
'--passphrase-file',
270
passfile.name]
271
+ self.gnupgargs,
272
stdin=subprocess.PIPE,
273
stdout=subprocess.PIPE,
274
stderr=subprocess.PIPE)
275
decrypted_plaintext, err = proc.communicate(input=data)
276
if proc.returncode != 0:
277
raise PGPError(err)
207
278
return decrypted_plaintext
208
279
209
280
281
# Pretend that we have an Avahi module
282
class avahi(object):
283
"""This isn't so much a class as it is a module-like namespace."""
284
IF_UNSPEC = -1 # avahi-common/address.h
285
PROTO_UNSPEC = -1 # avahi-common/address.h
286
PROTO_INET = 0 # avahi-common/address.h
287
PROTO_INET6 = 1 # avahi-common/address.h
288
DBUS_NAME = "org.freedesktop.Avahi"
289
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
290
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
291
DBUS_PATH_SERVER = "/"
292
293
@staticmethod
294
def string_array_to_txt_array(t):
295
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
296
for s in t), signature="ay")
297
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
298
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
299
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
300
SERVER_INVALID = 0 # avahi-common/defs.h
301
SERVER_REGISTERING = 1 # avahi-common/defs.h
302
SERVER_RUNNING = 2 # avahi-common/defs.h
303
SERVER_COLLISION = 3 # avahi-common/defs.h
304
SERVER_FAILURE = 4 # avahi-common/defs.h
305
210
306
211
307
class AvahiError(Exception):
212
308
def __init__(self, value, *args, **kwargs):
213
309
self.value = value
214
super(AvahiError, self).__init__(value, *args, **kwargs)
215
def __unicode__(self):
216
return unicode(repr(self.value))
310
return super(AvahiError, self).__init__(value, *args,
311
**kwargs)
312
217
313
218
314
class AvahiServiceError(AvahiError):
219
315
pass
220
316
317
221
318
class AvahiGroupError(AvahiError):
222
319
pass
223
320
224
321
225
322
class AvahiService(object):
226
323
"""An Avahi (Zeroconf) service.
227
324
228
325
Attributes:
229
326
interface: integer; avahi.IF_UNSPEC or an interface index.
230
327
Used to optionally bind to the specified interface.
231
328
name: string; Example: 'Mandos'
232
329
type: string; Example: '_mandos._tcp'.
233
See <http://www.dns-sd.org/ServiceTypes.html>
330
See <https://www.iana.org/assignments/service-names-port-numbers>
234
331
port: integer; what port to announce
235
332
TXT: list of strings; TXT record for the service
236
333
domain: string; Domain to publish on, default to .local if empty.
242
339
server: D-Bus Server
243
340
bus: dbus.SystemBus()
244
341
"""
245
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
246
servicetype = None, port = None, TXT = None,
247
domain = "", host = "", max_renames = 32768,
248
protocol = avahi.PROTO_UNSPEC, bus = None):
342
343
def __init__(self,
344
interface=avahi.IF_UNSPEC,
345
name=None,
346
servicetype=None,
347
port=None,
348
TXT=None,
349
domain="",
350
host="",
351
max_renames=32768,
352
protocol=avahi.PROTO_UNSPEC,
353
bus=None):
249
354
self.interface = interface
250
355
self.name = name
251
356
self.type = servicetype
260
365
self.server = None
261
366
self.bus = bus
262
367
self.entry_group_state_changed_match = None
263
def rename(self):
368
369
def rename(self, remove=True):
264
370
"""Derived from the Avahi example code"""
265
371
if self.rename_count >= self.max_renames:
266
372
logger.critical("No suitable Zeroconf service name found"
267
373
" after %i retries, exiting.",
268
374
self.rename_count)
269
375
raise AvahiServiceError("Too many renames")
270
self.name = unicode(self.server
271
.GetAlternativeServiceName(self.name))
376
self.name = str(
377
self.server.GetAlternativeServiceName(self.name))
378
self.rename_count += 1
272
379
logger.info("Changing Zeroconf service name to %r ...",
273
380
self.name)
274
self.remove()
381
if remove:
382
self.remove()
275
383
try:
276
384
self.add()
277
385
except dbus.exceptions.DBusException as error:
278
logger.critical("DBusException: %s", error)
279
self.cleanup()
280
os._exit(1)
281
self.rename_count += 1
386
if (error.get_dbus_name()
387
== "org.freedesktop.Avahi.CollisionError"):
388
logger.info("Local Zeroconf service name collision.")
389
return self.rename(remove=False)
390
else:
391
logger.critical("D-Bus Exception", exc_info=error)
392
self.cleanup()
393
os._exit(1)
394
282
395
def remove(self):
283
396
"""Derived from the Avahi example code"""
284
397
if self.entry_group_state_changed_match is not None:
286
399
self.entry_group_state_changed_match = None
287
400
if self.group is not None:
288
401
self.group.Reset()
402
289
403
def add(self):
290
404
"""Derived from the Avahi example code"""
291
405
self.remove()
308
422
dbus.UInt16(self.port),
309
423
avahi.string_array_to_txt_array(self.TXT))
310
424
self.group.Commit()
425
311
426
def entry_group_state_changed(self, state, error):
312
427
"""Derived from the Avahi example code"""
313
428
logger.debug("Avahi entry group state change: %i", state)
314
429
315
430
if state == avahi.ENTRY_GROUP_ESTABLISHED:
316
431
logger.debug("Zeroconf service established.")
317
432
elif state == avahi.ENTRY_GROUP_COLLISION:
319
434
self.rename()
320
435
elif state == avahi.ENTRY_GROUP_FAILURE:
321
436
logger.critical("Avahi: Error in group state changed %s",
322
unicode(error))
323
raise AvahiGroupError("State changed: %s"
324
% unicode(error))
437
str(error))
438
raise AvahiGroupError("State changed: {!s}".format(error))
439
325
440
def cleanup(self):
326
441
"""Derived from the Avahi example code"""
327
442
if self.group is not None:
332
447
pass
333
448
self.group = None
334
449
self.remove()
450
335
451
def server_state_changed(self, state, error=None):
336
452
"""Derived from the Avahi example code"""
337
453
logger.debug("Avahi server state change: %i", state)
338
bad_states = { avahi.SERVER_INVALID:
339
"Zeroconf server invalid",
340
avahi.SERVER_REGISTERING: None,
341
avahi.SERVER_COLLISION:
342
"Zeroconf server name collision",
343
avahi.SERVER_FAILURE:
344
"Zeroconf server failure" }
454
bad_states = {
455
avahi.SERVER_INVALID: "Zeroconf server invalid",
456
avahi.SERVER_REGISTERING: None,
457
avahi.SERVER_COLLISION: "Zeroconf server name collision",
458
avahi.SERVER_FAILURE: "Zeroconf server failure",
459
}
345
460
if state in bad_states:
346
461
if bad_states[state] is not None:
347
462
if error is None:
350
465
logger.error(bad_states[state] + ": %r", error)
351
466
self.cleanup()
352
467
elif state == avahi.SERVER_RUNNING:
353
self.add()
468
try:
469
self.add()
470
except dbus.exceptions.DBusException as error:
471
if (error.get_dbus_name()
472
== "org.freedesktop.Avahi.CollisionError"):
473
logger.info("Local Zeroconf service name"
474
" collision.")
475
return self.rename(remove=False)
476
else:
477
logger.critical("D-Bus Exception", exc_info=error)
478
self.cleanup()
479
os._exit(1)
354
480
else:
355
481
if error is None:
356
482
logger.debug("Unknown state: %r", state)
357
483
else:
358
484
logger.debug("Unknown state: %r: %r", state, error)
485
359
486
def activate(self):
360
487
"""Derived from the Avahi example code"""
361
488
if self.server is None:
365
492
follow_name_owner_changes=True),
366
493
avahi.DBUS_INTERFACE_SERVER)
367
494
self.server.connect_to_signal("StateChanged",
368
self.server_state_changed)
495
self.server_state_changed)
369
496
self.server_state_changed(self.server.GetState())
370
497
498
371
499
class AvahiServiceToSyslog(AvahiService):
372
def rename(self):
500
def rename(self, *args, **kwargs):
373
501
"""Add the new name to the syslog messages"""
374
ret = AvahiService.rename(self)
375
syslogger.setFormatter(logging.Formatter
376
('Mandos (%s) [%%(process)d]:'
377
' %%(levelname)s: %%(message)s'
378
% self.name))
502
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
503
syslogger.setFormatter(logging.Formatter(
504
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
505
.format(self.name)))
379
506
return ret
380
507
381
def timedelta_to_milliseconds(td):
382
"Convert a datetime.timedelta() to milliseconds"
383
return ((td.days * 24 * 60 * 60 * 1000)
384
+ (td.seconds * 1000)
385
+ (td.microseconds // 1000))
386
508
509
# Pretend that we have a GnuTLS module
510
class gnutls(object):
511
"""This isn't so much a class as it is a module-like namespace."""
512
513
library = ctypes.util.find_library("gnutls")
514
if library is None:
515
library = ctypes.util.find_library("gnutls-deb0")
516
_library = ctypes.cdll.LoadLibrary(library)
517
del library
518
519
# Unless otherwise indicated, the constants and types below are
520
# all from the gnutls/gnutls.h C header file.
521
522
# Constants
523
E_SUCCESS = 0
524
E_INTERRUPTED = -52
525
E_AGAIN = -28
526
CRT_OPENPGP = 2
527
CRT_RAWPK = 3
528
CLIENT = 2
529
SHUT_RDWR = 0
530
CRD_CERTIFICATE = 1
531
E_NO_CERTIFICATE_FOUND = -49
532
X509_FMT_DER = 0
533
NO_TICKETS = 1<<10
534
ENABLE_RAWPK = 1<<18
535
CTYPE_PEERS = 3
536
KEYID_USE_SHA256 = 1 # gnutls/x509.h
537
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
538
539
# Types
540
class session_int(ctypes.Structure):
541
_fields_ = []
542
session_t = ctypes.POINTER(session_int)
543
544
class certificate_credentials_st(ctypes.Structure):
545
_fields_ = []
546
certificate_credentials_t = ctypes.POINTER(
547
certificate_credentials_st)
548
certificate_type_t = ctypes.c_int
549
550
class datum_t(ctypes.Structure):
551
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
552
('size', ctypes.c_uint)]
553
554
class openpgp_crt_int(ctypes.Structure):
555
_fields_ = []
556
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
557
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
558
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
559
credentials_type_t = ctypes.c_int
560
transport_ptr_t = ctypes.c_void_p
561
close_request_t = ctypes.c_int
562
563
# Exceptions
564
class Error(Exception):
565
def __init__(self, message=None, code=None, args=()):
566
# Default usage is by a message string, but if a return
567
# code is passed, convert it to a string with
568
# gnutls.strerror()
569
self.code = code
570
if message is None and code is not None:
571
message = gnutls.strerror(code)
572
return super(gnutls.Error, self).__init__(
573
message, *args)
574
575
class CertificateSecurityError(Error):
576
pass
577
578
# Classes
579
class Credentials(object):
580
def __init__(self):
581
self._c_object = gnutls.certificate_credentials_t()
582
gnutls.certificate_allocate_credentials(
583
ctypes.byref(self._c_object))
584
self.type = gnutls.CRD_CERTIFICATE
585
586
def __del__(self):
587
gnutls.certificate_free_credentials(self._c_object)
588
589
class ClientSession(object):
590
def __init__(self, socket, credentials=None):
591
self._c_object = gnutls.session_t()
592
gnutls_flags = gnutls.CLIENT
593
if gnutls.check_version(b"3.5.6"):
594
gnutls_flags |= gnutls.NO_TICKETS
595
if gnutls.has_rawpk:
596
gnutls_flags |= gnutls.ENABLE_RAWPK
597
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
598
del gnutls_flags
599
gnutls.set_default_priority(self._c_object)
600
gnutls.transport_set_ptr(self._c_object, socket.fileno())
601
gnutls.handshake_set_private_extensions(self._c_object,
602
True)
603
self.socket = socket
604
if credentials is None:
605
credentials = gnutls.Credentials()
606
gnutls.credentials_set(self._c_object, credentials.type,
607
ctypes.cast(credentials._c_object,
608
ctypes.c_void_p))
609
self.credentials = credentials
610
611
def __del__(self):
612
gnutls.deinit(self._c_object)
613
614
def handshake(self):
615
return gnutls.handshake(self._c_object)
616
617
def send(self, data):
618
data = bytes(data)
619
data_len = len(data)
620
while data_len > 0:
621
data_len -= gnutls.record_send(self._c_object,
622
data[-data_len:],
623
data_len)
624
625
def bye(self):
626
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
627
628
# Error handling functions
629
def _error_code(result):
630
"""A function to raise exceptions on errors, suitable
631
for the 'restype' attribute on ctypes functions"""
632
if result >= 0:
633
return result
634
if result == gnutls.E_NO_CERTIFICATE_FOUND:
635
raise gnutls.CertificateSecurityError(code=result)
636
raise gnutls.Error(code=result)
637
638
def _retry_on_error(result, func, arguments):
639
"""A function to retry on some errors, suitable
640
for the 'errcheck' attribute on ctypes functions"""
641
while result < 0:
642
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
643
return _error_code(result)
644
result = func(*arguments)
645
return result
646
647
# Unless otherwise indicated, the function declarations below are
648
# all from the gnutls/gnutls.h C header file.
649
650
# Functions
651
priority_set_direct = _library.gnutls_priority_set_direct
652
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
653
ctypes.POINTER(ctypes.c_char_p)]
654
priority_set_direct.restype = _error_code
655
656
init = _library.gnutls_init
657
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
658
init.restype = _error_code
659
660
set_default_priority = _library.gnutls_set_default_priority
661
set_default_priority.argtypes = [session_t]
662
set_default_priority.restype = _error_code
663
664
record_send = _library.gnutls_record_send
665
record_send.argtypes = [session_t, ctypes.c_void_p,
666
ctypes.c_size_t]
667
record_send.restype = ctypes.c_ssize_t
668
record_send.errcheck = _retry_on_error
669
670
certificate_allocate_credentials = (
671
_library.gnutls_certificate_allocate_credentials)
672
certificate_allocate_credentials.argtypes = [
673
ctypes.POINTER(certificate_credentials_t)]
674
certificate_allocate_credentials.restype = _error_code
675
676
certificate_free_credentials = (
677
_library.gnutls_certificate_free_credentials)
678
certificate_free_credentials.argtypes = [
679
certificate_credentials_t]
680
certificate_free_credentials.restype = None
681
682
handshake_set_private_extensions = (
683
_library.gnutls_handshake_set_private_extensions)
684
handshake_set_private_extensions.argtypes = [session_t,
685
ctypes.c_int]
686
handshake_set_private_extensions.restype = None
687
688
credentials_set = _library.gnutls_credentials_set
689
credentials_set.argtypes = [session_t, credentials_type_t,
690
ctypes.c_void_p]
691
credentials_set.restype = _error_code
692
693
strerror = _library.gnutls_strerror
694
strerror.argtypes = [ctypes.c_int]
695
strerror.restype = ctypes.c_char_p
696
697
certificate_type_get = _library.gnutls_certificate_type_get
698
certificate_type_get.argtypes = [session_t]
699
certificate_type_get.restype = _error_code
700
701
certificate_get_peers = _library.gnutls_certificate_get_peers
702
certificate_get_peers.argtypes = [session_t,
703
ctypes.POINTER(ctypes.c_uint)]
704
certificate_get_peers.restype = ctypes.POINTER(datum_t)
705
706
global_set_log_level = _library.gnutls_global_set_log_level
707
global_set_log_level.argtypes = [ctypes.c_int]
708
global_set_log_level.restype = None
709
710
global_set_log_function = _library.gnutls_global_set_log_function
711
global_set_log_function.argtypes = [log_func]
712
global_set_log_function.restype = None
713
714
deinit = _library.gnutls_deinit
715
deinit.argtypes = [session_t]
716
deinit.restype = None
717
718
handshake = _library.gnutls_handshake
719
handshake.argtypes = [session_t]
720
handshake.restype = _error_code
721
handshake.errcheck = _retry_on_error
722
723
transport_set_ptr = _library.gnutls_transport_set_ptr
724
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
725
transport_set_ptr.restype = None
726
727
bye = _library.gnutls_bye
728
bye.argtypes = [session_t, close_request_t]
729
bye.restype = _error_code
730
bye.errcheck = _retry_on_error
731
732
check_version = _library.gnutls_check_version
733
check_version.argtypes = [ctypes.c_char_p]
734
check_version.restype = ctypes.c_char_p
735
736
_need_version = b"3.3.0"
737
if check_version(_need_version) is None:
738
raise self.Error("Needs GnuTLS {} or later"
739
.format(_need_version))
740
741
_tls_rawpk_version = b"3.6.6"
742
has_rawpk = bool(check_version(_tls_rawpk_version))
743
744
if has_rawpk:
745
# Types
746
class pubkey_st(ctypes.Structure):
747
_fields = []
748
pubkey_t = ctypes.POINTER(pubkey_st)
749
750
x509_crt_fmt_t = ctypes.c_int
751
752
# All the function declarations below are from gnutls/abstract.h
753
pubkey_init = _library.gnutls_pubkey_init
754
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
755
pubkey_init.restype = _error_code
756
757
pubkey_import = _library.gnutls_pubkey_import
758
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
759
x509_crt_fmt_t]
760
pubkey_import.restype = _error_code
761
762
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
763
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
764
ctypes.POINTER(ctypes.c_ubyte),
765
ctypes.POINTER(ctypes.c_size_t)]
766
pubkey_get_key_id.restype = _error_code
767
768
pubkey_deinit = _library.gnutls_pubkey_deinit
769
pubkey_deinit.argtypes = [pubkey_t]
770
pubkey_deinit.restype = None
771
else:
772
# All the function declarations below are from gnutls/openpgp.h
773
774
openpgp_crt_init = _library.gnutls_openpgp_crt_init
775
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
776
openpgp_crt_init.restype = _error_code
777
778
openpgp_crt_import = _library.gnutls_openpgp_crt_import
779
openpgp_crt_import.argtypes = [openpgp_crt_t,
780
ctypes.POINTER(datum_t),
781
openpgp_crt_fmt_t]
782
openpgp_crt_import.restype = _error_code
783
784
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
785
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
786
ctypes.POINTER(ctypes.c_uint)]
787
openpgp_crt_verify_self.restype = _error_code
788
789
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
790
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
791
openpgp_crt_deinit.restype = None
792
793
openpgp_crt_get_fingerprint = (
794
_library.gnutls_openpgp_crt_get_fingerprint)
795
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
796
ctypes.c_void_p,
797
ctypes.POINTER(
798
ctypes.c_size_t)]
799
openpgp_crt_get_fingerprint.restype = _error_code
800
801
if check_version(b"3.6.4"):
802
certificate_type_get2 = _library.gnutls_certificate_type_get2
803
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
804
certificate_type_get2.restype = _error_code
805
806
# Remove non-public functions
807
del _error_code, _retry_on_error
808
809
810
def call_pipe(connection, # : multiprocessing.Connection
811
func, *args, **kwargs):
812
"""This function is meant to be called by multiprocessing.Process
813
814
This function runs func(*args, **kwargs), and writes the resulting
815
return value on the provided multiprocessing.Connection.
816
"""
817
connection.send(func(*args, **kwargs))
818
connection.close()
819
820
387
821
class Client(object):
388
822
"""A representation of a client host served by this server.
389
823
390
824
Attributes:
391
825
approved: bool(); 'None' if not yet approved/disapproved
392
826
approval_delay: datetime.timedelta(); Time to wait for approval
393
827
approval_duration: datetime.timedelta(); Duration of one approval
394
checker: subprocess.Popen(); a running checker process used
395
to see if the client lives.
396
'None' if no process is running.
397
checker_callback_tag: a gobject event source tag, or None
828
checker: multiprocessing.Process(); a running checker process used
829
to see if the client lives. 'None' if no process is
830
running.
831
checker_callback_tag: a GLib event source tag, or None
398
832
checker_command: string; External command which is run to check
399
833
if client lives. %() expansions are done at
400
834
runtime with vars(self) as dict, so that for
401
835
instance %(name)s can be used in the command.
402
checker_initiator_tag: a gobject event source tag, or None
836
checker_initiator_tag: a GLib event source tag, or None
403
837
created: datetime.datetime(); (UTC) object creation
404
838
client_structure: Object describing what attributes a client has
405
839
and is used for storing the client at exit
406
840
current_checker_command: string; current running checker_command
407
disable_initiator_tag: a gobject event source tag, or None
841
disable_initiator_tag: a GLib event source tag, or None
408
842
enabled: bool()
409
843
fingerprint: string (40 or 32 hexadecimal digits); used to
410
uniquely identify the client
844
uniquely identify an OpenPGP client
845
key_id: string (64 hexadecimal digits); used to uniquely identify
846
a client using raw public keys
411
847
host: string; available for use by the checker command
412
848
interval: datetime.timedelta(); How often to start a new checker
413
849
last_approval_request: datetime.datetime(); (UTC) or None
414
850
last_checked_ok: datetime.datetime(); (UTC) or None
415
851
last_checker_status: integer between 0 and 255 reflecting exit
416
852
status of last checker. -1 reflects crashed
417
checker, or None.
853
checker, -2 means no checker completed yet.
854
last_checker_signal: The signal which killed the last checker, if
855
last_checker_status is -1
418
856
last_enabled: datetime.datetime(); (UTC) or None
419
857
name: string; from the config file, used in log messages and
420
858
D-Bus identifiers
421
859
secret: bytestring; sent verbatim (over TLS) to client
422
860
timeout: datetime.timedelta(); How long from last_checked_ok
423
861
until this client is disabled
424
extended_timeout: extra long timeout when password has been sent
862
extended_timeout: extra long timeout when secret has been sent
425
863
runtime_expansions: Allowed attributes for runtime expansion.
426
864
expires: datetime.datetime(); time (UTC) when a client will be
427
865
disabled, or None
866
server_settings: The server_settings dict from main()
428
867
"""
429
868
430
869
runtime_expansions = ("approval_delay", "approval_duration",
431
"created", "enabled", "fingerprint",
432
"host", "interval", "last_checked_ok",
870
"created", "enabled", "expires", "key_id",
871
"fingerprint", "host", "interval",
872
"last_approval_request", "last_checked_ok",
433
873
"last_enabled", "name", "timeout")
434
client_defaults = { "timeout": "5m",
435
"extended_timeout": "15m",
436
"interval": "2m",
437
"checker": "fping -q -- %%(host)s",
438
"host": "",
439
"approval_delay": "0s",
440
"approval_duration": "1s",
441
"approved_by_default": "True",
442
"enabled": "True",
443
}
444
445
def timeout_milliseconds(self):
446
"Return the 'timeout' attribute in milliseconds"
447
return timedelta_to_milliseconds(self.timeout)
448
449
def extended_timeout_milliseconds(self):
450
"Return the 'extended_timeout' attribute in milliseconds"
451
return timedelta_to_milliseconds(self.extended_timeout)
452
453
def interval_milliseconds(self):
454
"Return the 'interval' attribute in milliseconds"
455
return timedelta_to_milliseconds(self.interval)
456
457
def approval_delay_milliseconds(self):
458
return timedelta_to_milliseconds(self.approval_delay)
874
client_defaults = {
875
"timeout": "PT5M",
876
"extended_timeout": "PT15M",
877
"interval": "PT2M",
878
"checker": "fping -q -- %%(host)s",
879
"host": "",
880
"approval_delay": "PT0S",
881
"approval_duration": "PT1S",
882
"approved_by_default": "True",
883
"enabled": "True",
884
}
459
885
460
886
@staticmethod
461
887
def config_parser(config):
462
""" Construct a new dict of client settings of this form:
888
"""Construct a new dict of client settings of this form:
463
889
{ client_name: {setting_name: value, ...}, ...}
464
with exceptions for any special settings as defined above"""
890
with exceptions for any special settings as defined above.
891
NOTE: Must be a pure function. Must return the same result
892
value given the same arguments.
893
"""
465
894
settings = {}
466
895
for client_name in config.sections():
467
896
section = dict(config.items(client_name))
468
897
client = settings[client_name] = {}
469
898
470
899
client["host"] = section["host"]
471
900
# Reformat values from string types to Python types
472
901
client["approved_by_default"] = config.getboolean(
473
902
client_name, "approved_by_default")
474
client["enabled"] = config.getboolean(client_name, "enabled")
475
903
client["enabled"] = config.getboolean(client_name,
904
"enabled")
905
906
# Uppercase and remove spaces from key_id and fingerprint
907
# for later comparison purposes with return value from the
908
# key_id() and fingerprint() functions
909
client["key_id"] = (section.get("key_id", "").upper()
910
.replace(" ", ""))
476
911
client["fingerprint"] = (section["fingerprint"].upper()
477
912
.replace(" ", ""))
478
913
if "secret" in section:
479
client["secret"] = section["secret"].decode("base64")
914
client["secret"] = codecs.decode(section["secret"]
915
.encode("utf-8"),
916
"base64")
480
917
elif "secfile" in section:
481
918
with open(os.path.expanduser(os.path.expandvars
482
919
(section["secfile"])),
483
920
"rb") as secfile:
484
921
client["secret"] = secfile.read()
485
922
else:
486
raise TypeError("No secret or secfile for section %s"
487
% section)
923
raise TypeError("No secret or secfile for section {}"
924
.format(section))
488
925
client["timeout"] = string_to_delta(section["timeout"])
489
926
client["extended_timeout"] = string_to_delta(
490
927
section["extended_timeout"])
496
933
client["checker_command"] = section["checker"]
497
934
client["last_approval_request"] = None
498
935
client["last_checked_ok"] = None
499
client["last_checker_status"] = None
500
if client["enabled"]:
501
client["last_enabled"] = datetime.datetime.utcnow()
502
client["expires"] = (datetime.datetime.utcnow()
503
+ client["timeout"])
504
else:
505
client["last_enabled"] = None
506
client["expires"] = None
936
client["last_checker_status"] = -2
507
937
508
938
return settings
509
510
511
def __init__(self, settings, name = None):
512
"""Note: the 'checker' key in 'config' sets the
513
'checker_command' attribute and *not* the 'checker'
514
attribute."""
939
940
def __init__(self, settings, name=None, server_settings=None):
515
941
self.name = name
942
if server_settings is None:
943
server_settings = {}
944
self.server_settings = server_settings
516
945
# adding all client settings
517
for setting, value in settings.iteritems():
946
for setting, value in settings.items():
518
947
setattr(self, setting, value)
519
948
949
if self.enabled:
950
if not hasattr(self, "last_enabled"):
951
self.last_enabled = datetime.datetime.utcnow()
952
if not hasattr(self, "expires"):
953
self.expires = (datetime.datetime.utcnow()
954
+ self.timeout)
955
else:
956
self.last_enabled = None
957
self.expires = None
958
520
959
logger.debug("Creating client %r", self.name)
521
# Uppercase and remove spaces from fingerprint for later
522
# comparison purposes with return value from the fingerprint()
523
# function
960
logger.debug(" Key ID: %s", self.key_id)
524
961
logger.debug(" Fingerprint: %s", self.fingerprint)
525
self.created = settings.get("created", datetime.datetime.utcnow())
962
self.created = settings.get("created",
963
datetime.datetime.utcnow())
526
964
527
965
# attributes specific for this server instance
528
966
self.checker = None
532
970
self.current_checker_command = None
533
971
self.approved = None
534
972
self.approvals_pending = 0
535
self.changedstate = (multiprocessing_manager
536
.Condition(multiprocessing_manager
537
.Lock()))
538
self.client_structure = [attr for attr in
539
self.__dict__.iterkeys()
973
self.changedstate = multiprocessing_manager.Condition(
974
multiprocessing_manager.Lock())
975
self.client_structure = [attr
976
for attr in self.__dict__.keys()
540
977
if not attr.startswith("_")]
541
978
self.client_structure.append("client_structure")
542
543
for name, t in inspect.getmembers(type(self),
544
lambda obj:
545
isinstance(obj,
546
property)):
979
980
for name, t in inspect.getmembers(
981
type(self), lambda obj: isinstance(obj, property)):
547
982
if not name.startswith("_"):
548
983
self.client_structure.append(name)
549
984
550
985
# Send notice to process children that client state has changed
551
986
def send_changedstate(self):
552
987
with self.changedstate:
553
988
self.changedstate.notify_all()
554
989
555
990
def enable(self):
556
991
"""Start this client's checker and timeout hooks"""
557
992
if getattr(self, "enabled", False):
558
993
# Already enabled
559
994
return
560
self.send_changedstate()
561
995
self.expires = datetime.datetime.utcnow() + self.timeout
562
996
self.enabled = True
563
997
self.last_enabled = datetime.datetime.utcnow()
564
998
self.init_checker()
565
999
self.send_changedstate()
1000
566
1001
def disable(self, quiet=True):
567
1002
"""Disable this client."""
568
1003
if not getattr(self, "enabled", False):
569
1004
return False
570
1005
if not quiet:
571
self.send_changedstate()
572
if not quiet:
573
1006
logger.info("Disabling client %s", self.name)
574
if getattr(self, "disable_initiator_tag", False):
575
gobject.source_remove(self.disable_initiator_tag)
1007
if getattr(self, "disable_initiator_tag", None) is not None:
1008
GLib.source_remove(self.disable_initiator_tag)
576
1009
self.disable_initiator_tag = None
577
1010
self.expires = None
578
if getattr(self, "checker_initiator_tag", False):
579
gobject.source_remove(self.checker_initiator_tag)
1011
if getattr(self, "checker_initiator_tag", None) is not None:
1012
GLib.source_remove(self.checker_initiator_tag)
580
1013
self.checker_initiator_tag = None
581
1014
self.stop_checker()
582
1015
self.enabled = False
583
# Do not run this again if called by a gobject.timeout_add
1016
if not quiet:
1017
self.send_changedstate()
1018
# Do not run this again if called by a GLib.timeout_add
584
1019
return False
585
1020
586
1021
def __del__(self):
587
1022
self.disable()
588
1023
589
1024
def init_checker(self):
590
1025
# Schedule a new checker to be started an 'interval' from now,
591
1026
# and every interval from then on.
592
self.checker_initiator_tag = (gobject.timeout_add
593
(self.interval_milliseconds(),
594
self.start_checker))
1027
if self.checker_initiator_tag is not None:
1028
GLib.source_remove(self.checker_initiator_tag)
1029
self.checker_initiator_tag = GLib.timeout_add(
1030
int(self.interval.total_seconds() * 1000),
1031
self.start_checker)
595
1032
# Schedule a disable() when 'timeout' has passed
596
self.disable_initiator_tag = (gobject.timeout_add
597
(self.timeout_milliseconds(),
598
self.disable))
1033
if self.disable_initiator_tag is not None:
1034
GLib.source_remove(self.disable_initiator_tag)
1035
self.disable_initiator_tag = GLib.timeout_add(
1036
int(self.timeout.total_seconds() * 1000), self.disable)
599
1037
# Also start a new checker *right now*.
600
1038
self.start_checker()
601
602
def checker_callback(self, pid, condition, command):
1039
1040
def checker_callback(self, source, condition, connection,
1041
command):
603
1042
"""The checker has completed, so take appropriate actions."""
1043
# Read return code from connection (see call_pipe)
1044
returncode = connection.recv()
1045
connection.close()
1046
self.checker.join()
604
1047
self.checker_callback_tag = None
605
1048
self.checker = None
606
if os.WIFEXITED(condition):
607
self.last_checker_status = os.WEXITSTATUS(condition)
1049
1050
if returncode >= 0:
1051
self.last_checker_status = returncode
1052
self.last_checker_signal = None
608
1053
if self.last_checker_status == 0:
609
1054
logger.info("Checker for %(name)s succeeded",
610
1055
vars(self))
611
1056
self.checked_ok()
612
1057
else:
613
logger.info("Checker for %(name)s failed",
614
vars(self))
1058
logger.info("Checker for %(name)s failed", vars(self))
615
1059
else:
616
1060
self.last_checker_status = -1
1061
self.last_checker_signal = -returncode
617
1062
logger.warning("Checker for %(name)s crashed?",
618
1063
vars(self))
619
620
def checked_ok(self, timeout=None):
621
"""Bump up the timeout for this client.
622
623
This should only be called when the client has been seen,
624
alive and well.
625
"""
1064
return False
1065
1066
def checked_ok(self):
1067
"""Assert that the client has been seen, alive and well."""
1068
self.last_checked_ok = datetime.datetime.utcnow()
1069
self.last_checker_status = 0
1070
self.last_checker_signal = None
1071
self.bump_timeout()
1072
1073
def bump_timeout(self, timeout=None):
1074
"""Bump up the timeout for this client."""
626
1075
if timeout is None:
627
1076
timeout = self.timeout
628
self.last_checked_ok = datetime.datetime.utcnow()
629
1077
if self.disable_initiator_tag is not None:
630
gobject.source_remove(self.disable_initiator_tag)
1078
GLib.source_remove(self.disable_initiator_tag)
1079
self.disable_initiator_tag = None
631
1080
if getattr(self, "enabled", False):
632
self.disable_initiator_tag = (gobject.timeout_add
633
(timedelta_to_milliseconds
634
(timeout), self.disable))
1081
self.disable_initiator_tag = GLib.timeout_add(
1082
int(timeout.total_seconds() * 1000), self.disable)
635
1083
self.expires = datetime.datetime.utcnow() + timeout
636
1084
637
1085
def need_approval(self):
638
1086
self.last_approval_request = datetime.datetime.utcnow()
639
1087
640
1088
def start_checker(self):
641
1089
"""Start a new checker subprocess if one is not running.
642
1090
643
1091
If a checker already exists, leave it running and do
644
1092
nothing."""
645
1093
# The reason for not killing a running checker is that if we
646
# did that, then if a checker (for some reason) started
647
# running slowly and taking more than 'interval' time, the
648
# client would inevitably timeout, since no checker would get
649
# a chance to run to completion. If we instead leave running
1094
# did that, and if a checker (for some reason) started running
1095
# slowly and taking more than 'interval' time, then the client
1096
# would inevitably timeout, since no checker would get a
1097
# chance to run to completion. If we instead leave running
650
1098
# checkers alone, the checker would have to take more time
651
1099
# than 'timeout' for the client to be disabled, which is as it
652
1100
# should be.
653
654
# If a checker exists, make sure it is not a zombie
655
try:
656
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
657
except (AttributeError, OSError) as error:
658
if (isinstance(error, OSError)
659
and error.errno != errno.ECHILD):
660
raise error
661
else:
662
if pid:
663
logger.warning("Checker was a zombie")
664
gobject.source_remove(self.checker_callback_tag)
665
self.checker_callback(pid, status,
666
self.current_checker_command)
1101
1102
if self.checker is not None and not self.checker.is_alive():
1103
logger.warning("Checker was not alive; joining")
1104
self.checker.join()
1105
self.checker = None
667
1106
# Start a new checker if needed
668
1107
if self.checker is None:
1108
# Escape attributes for the shell
1109
escaped_attrs = {
1110
attr: re.escape(str(getattr(self, attr)))
1111
for attr in self.runtime_expansions}
669
1112
try:
670
# In case checker_command has exactly one % operator
671
command = self.checker_command % self.host
672
except TypeError:
673
# Escape attributes for the shell
674
escaped_attrs = dict(
675
(attr,
676
re.escape(unicode(str(getattr(self, attr, "")),
677
errors=
678
'replace')))
679
for attr in
680
self.runtime_expansions)
681
682
try:
683
command = self.checker_command % escaped_attrs
684
except TypeError as error:
685
logger.error('Could not format string "%s":'
686
' %s', self.checker_command, error)
687
return True # Try again later
1113
command = self.checker_command % escaped_attrs
1114
except TypeError as error:
1115
logger.error('Could not format string "%s"',
1116
self.checker_command,
1117
exc_info=error)
1118
return True # Try again later
688
1119
self.current_checker_command = command
689
try:
690
logger.info("Starting checker %r for %s",
691
command, self.name)
692
# We don't need to redirect stdout and stderr, since
693
# in normal mode, that is already done by daemon(),
694
# and in debug mode we don't want to. (Stdin is
695
# always replaced by /dev/null.)
696
self.checker = subprocess.Popen(command,
697
close_fds=True,
698
shell=True, cwd="/")
699
self.checker_callback_tag = (gobject.child_watch_add
700
(self.checker.pid,
701
self.checker_callback,
702
data=command))
703
# The checker may have completed before the gobject
704
# watch was added. Check for this.
705
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
706
if pid:
707
gobject.source_remove(self.checker_callback_tag)
708
self.checker_callback(pid, status, command)
709
except OSError as error:
710
logger.error("Failed to start subprocess: %s",
711
error)
712
# Re-run this periodically if run by gobject.timeout_add
1120
logger.info("Starting checker %r for %s", command,
1121
self.name)
1122
# We don't need to redirect stdout and stderr, since
1123
# in normal mode, that is already done by daemon(),
1124
# and in debug mode we don't want to. (Stdin is
1125
# always replaced by /dev/null.)
1126
# The exception is when not debugging but nevertheless
1127
# running in the foreground; use the previously
1128
# created wnull.
1129
popen_args = {"close_fds": True,
1130
"shell": True,
1131
"cwd": "/"}
1132
if (not self.server_settings["debug"]
1133
and self.server_settings["foreground"]):
1134
popen_args.update({"stdout": wnull,
1135
"stderr": wnull})
1136
pipe = multiprocessing.Pipe(duplex=False)
1137
self.checker = multiprocessing.Process(
1138
target=call_pipe,
1139
args=(pipe[1], subprocess.call, command),
1140
kwargs=popen_args)
1141
self.checker.start()
1142
self.checker_callback_tag = GLib.io_add_watch(
1143
pipe[0].fileno(), GLib.IO_IN,
1144
self.checker_callback, pipe[0], command)
1145
# Re-run this periodically if run by GLib.timeout_add
713
1146
return True
714
1147
715
1148
def stop_checker(self):
716
1149
"""Force the checker process, if any, to stop."""
717
1150
if self.checker_callback_tag:
718
gobject.source_remove(self.checker_callback_tag)
1151
GLib.source_remove(self.checker_callback_tag)
719
1152
self.checker_callback_tag = None
720
1153
if getattr(self, "checker", None) is None:
721
1154
return
722
1155
logger.debug("Stopping checker for %(name)s", vars(self))
723
try:
724
os.kill(self.checker.pid, signal.SIGTERM)
725
#time.sleep(0.5)
726
#if self.checker.poll() is None:
727
# os.kill(self.checker.pid, signal.SIGKILL)
728
except OSError as error:
729
if error.errno != errno.ESRCH: # No such process
730
raise
1156
self.checker.terminate()
731
1157
self.checker = None
732
1158
733
1159
734
def dbus_service_property(dbus_interface, signature="v",
735
access="readwrite", byte_arrays=False):
1160
def dbus_service_property(dbus_interface,
1161
signature="v",
1162
access="readwrite",
1163
byte_arrays=False):
736
1164
"""Decorators for marking methods of a DBusObjectWithProperties to
737
1165
become properties on the D-Bus.
738
1166
739
1167
The decorated method will be called with no arguments by "Get"
740
1168
and with one argument by "Set".
741
1169
742
1170
The parameters, where they are supported, are the same as
743
1171
dbus.service.method, except there is only "signature", since the
744
1172
type from Get() and the type sent to Set() is the same.
747
1175
# "Set" method, so we fail early here:
748
1176
if byte_arrays and signature != "ay":
749
1177
raise ValueError("Byte arrays not supported for non-'ay'"
750
" signature %r" % signature)
1178
" signature {!r}".format(signature))
1179
751
1180
def decorator(func):
752
1181
func._dbus_is_property = True
753
1182
func._dbus_interface = dbus_interface
756
1185
func._dbus_name = func.__name__
757
1186
if func._dbus_name.endswith("_dbus_property"):
758
1187
func._dbus_name = func._dbus_name[:-14]
759
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
760
return func
1188
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1189
return func
1190
1191
return decorator
1192
1193
1194
def dbus_interface_annotations(dbus_interface):
1195
"""Decorator for marking functions returning interface annotations
1196
1197
Usage:
1198
1199
@dbus_interface_annotations("org.example.Interface")
1200
def _foo(self): # Function name does not matter
1201
return {"org.freedesktop.DBus.Deprecated": "true",
1202
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1203
"false"}
1204
"""
1205
1206
def decorator(func):
1207
func._dbus_is_interface = True
1208
func._dbus_interface = dbus_interface
1209
func._dbus_name = dbus_interface
1210
return func
1211
1212
return decorator
1213
1214
1215
def dbus_annotations(annotations):
1216
"""Decorator to annotate D-Bus methods, signals or properties
1217
Usage:
1218
1219
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1220
"org.freedesktop.DBus.Property."
1221
"EmitsChangedSignal": "false"})
1222
@dbus_service_property("org.example.Interface", signature="b",
1223
access="r")
1224
def Property_dbus_property(self):
1225
return dbus.Boolean(False)
1226
1227
See also the DBusObjectWithAnnotations class.
1228
"""
1229
1230
def decorator(func):
1231
func._dbus_annotations = annotations
1232
return func
1233
761
1234
return decorator
762
1235
763
1236
764
1237
class DBusPropertyException(dbus.exceptions.DBusException):
765
1238
"""A base class for D-Bus property-related exceptions
766
1239
"""
767
def __unicode__(self):
768
return unicode(str(self))
1240
pass
769
1241
770
1242
771
1243
class DBusPropertyAccessException(DBusPropertyException):
780
1252
pass
781
1253
782
1254
783
class DBusObjectWithProperties(dbus.service.Object):
1255
class DBusObjectWithAnnotations(dbus.service.Object):
1256
"""A D-Bus object with annotations.
1257
1258
Classes inheriting from this can use the dbus_annotations
1259
decorator to add annotations to methods or signals.
1260
"""
1261
1262
@staticmethod
1263
def _is_dbus_thing(thing):
1264
"""Returns a function testing if an attribute is a D-Bus thing
1265
1266
If called like _is_dbus_thing("method") it returns a function
1267
suitable for use as predicate to inspect.getmembers().
1268
"""
1269
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1270
False)
1271
1272
def _get_all_dbus_things(self, thing):
1273
"""Returns a generator of (name, attribute) pairs
1274
"""
1275
return ((getattr(athing.__get__(self), "_dbus_name", name),
1276
athing.__get__(self))
1277
for cls in self.__class__.__mro__
1278
for name, athing in
1279
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1280
1281
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1282
out_signature="s",
1283
path_keyword='object_path',
1284
connection_keyword='connection')
1285
def Introspect(self, object_path, connection):
1286
"""Overloading of standard D-Bus method.
1287
1288
Inserts annotation tags on methods and signals.
1289
"""
1290
xmlstring = dbus.service.Object.Introspect(self, object_path,
1291
connection)
1292
try:
1293
document = xml.dom.minidom.parseString(xmlstring)
1294
1295
for if_tag in document.getElementsByTagName("interface"):
1296
# Add annotation tags
1297
for typ in ("method", "signal"):
1298
for tag in if_tag.getElementsByTagName(typ):
1299
annots = dict()
1300
for name, prop in (self.
1301
_get_all_dbus_things(typ)):
1302
if (name == tag.getAttribute("name")
1303
and prop._dbus_interface
1304
== if_tag.getAttribute("name")):
1305
annots.update(getattr(
1306
prop, "_dbus_annotations", {}))
1307
for name, value in annots.items():
1308
ann_tag = document.createElement(
1309
"annotation")
1310
ann_tag.setAttribute("name", name)
1311
ann_tag.setAttribute("value", value)
1312
tag.appendChild(ann_tag)
1313
# Add interface annotation tags
1314
for annotation, value in dict(
1315
itertools.chain.from_iterable(
1316
annotations().items()
1317
for name, annotations
1318
in self._get_all_dbus_things("interface")
1319
if name == if_tag.getAttribute("name")
1320
)).items():
1321
ann_tag = document.createElement("annotation")
1322
ann_tag.setAttribute("name", annotation)
1323
ann_tag.setAttribute("value", value)
1324
if_tag.appendChild(ann_tag)
1325
# Fix argument name for the Introspect method itself
1326
if (if_tag.getAttribute("name")
1327
== dbus.INTROSPECTABLE_IFACE):
1328
for cn in if_tag.getElementsByTagName("method"):
1329
if cn.getAttribute("name") == "Introspect":
1330
for arg in cn.getElementsByTagName("arg"):
1331
if (arg.getAttribute("direction")
1332
== "out"):
1333
arg.setAttribute("name",
1334
"xml_data")
1335
xmlstring = document.toxml("utf-8")
1336
document.unlink()
1337
except (AttributeError, xml.dom.DOMException,
1338
xml.parsers.expat.ExpatError) as error:
1339
logger.error("Failed to override Introspection method",
1340
exc_info=error)
1341
return xmlstring
1342
1343
1344
class DBusObjectWithProperties(DBusObjectWithAnnotations):
784
1345
"""A D-Bus object with properties.
785
1346
786
1347
Classes inheriting from this can use the dbus_service_property
787
1348
decorator to expose methods as D-Bus properties. It exposes the
788
1349
standard Get(), Set(), and GetAll() methods on the D-Bus.
789
1350
"""
790
791
@staticmethod
792
def _is_dbus_property(obj):
793
return getattr(obj, "_dbus_is_property", False)
794
795
def _get_all_dbus_properties(self):
796
"""Returns a generator of (name, attribute) pairs
797
"""
798
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
799
for cls in self.__class__.__mro__
800
for name, prop in
801
inspect.getmembers(cls, self._is_dbus_property))
802
1351
803
1352
def _get_dbus_property(self, interface_name, property_name):
804
1353
"""Returns a bound method if one exists which is a D-Bus
805
1354
property with the specified name and interface.
806
1355
"""
807
for cls in self.__class__.__mro__:
808
for name, value in (inspect.getmembers
809
(cls, self._is_dbus_property)):
1356
for cls in self.__class__.__mro__:
1357
for name, value in inspect.getmembers(
1358
cls, self._is_dbus_thing("property")):
810
1359
if (value._dbus_name == property_name
811
1360
and value._dbus_interface == interface_name):
812
1361
return value.__get__(self)
813
1362
814
1363
# No such property
815
raise DBusPropertyNotFound(self.dbus_object_path + ":"
816
+ interface_name + "."
817
+ property_name)
818
819
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1364
raise DBusPropertyNotFound("{}:{}.{}".format(
1365
self.dbus_object_path, interface_name, property_name))
1366
1367
@classmethod
1368
def _get_all_interface_names(cls):
1369
"""Get a sequence of all interfaces supported by an object"""
1370
return (name for name in set(getattr(getattr(x, attr),
1371
"_dbus_interface", None)
1372
for x in (inspect.getmro(cls))
1373
for attr in dir(x))
1374
if name is not None)
1375
1376
@dbus.service.method(dbus.PROPERTIES_IFACE,
1377
in_signature="ss",
820
1378
out_signature="v")
821
1379
def Get(self, interface_name, property_name):
822
1380
"""Standard D-Bus property Get() method, see D-Bus standard.
828
1386
if not hasattr(value, "variant_level"):
829
1387
return value
830
1388
return type(value)(value, variant_level=value.variant_level+1)
831
1389
832
1390
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
833
1391
def Set(self, interface_name, property_name, value):
834
1392
"""Standard D-Bus property Set() method, see D-Bus standard.
840
1398
# The byte_arrays option is not supported yet on
841
1399
# signatures other than "ay".
842
1400
if prop._dbus_signature != "ay":
843
raise ValueError
844
value = dbus.ByteArray(''.join(unichr(byte)
845
for byte in value))
1401
raise ValueError("Byte arrays not supported for non-"
1402
"'ay' signature {!r}"
1403
.format(prop._dbus_signature))
1404
value = dbus.ByteArray(b''.join(chr(byte)
1405
for byte in value))
846
1406
prop(value)
847
848
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1407
1408
@dbus.service.method(dbus.PROPERTIES_IFACE,
1409
in_signature="s",
849
1410
out_signature="a{sv}")
850
1411
def GetAll(self, interface_name):
851
1412
"""Standard D-Bus property GetAll() method, see D-Bus
852
1413
standard.
853
1414
854
1415
Note: Will not include properties with access="write".
855
1416
"""
856
1417
properties = {}
857
for name, prop in self._get_all_dbus_properties():
1418
for name, prop in self._get_all_dbus_things("property"):
858
1419
if (interface_name
859
1420
and interface_name != prop._dbus_interface):
860
1421
# Interface non-empty but did not match
866
1427
if not hasattr(value, "variant_level"):
867
1428
properties[name] = value
868
1429
continue
869
properties[name] = type(value)(value, variant_level=
870
value.variant_level+1)
1430
properties[name] = type(value)(
1431
value, variant_level=value.variant_level + 1)
871
1432
return dbus.Dictionary(properties, signature="sv")
872
1433
1434
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1435
def PropertiesChanged(self, interface_name, changed_properties,
1436
invalidated_properties):
1437
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1438
standard.
1439
"""
1440
pass
1441
873
1442
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
874
1443
out_signature="s",
875
1444
path_keyword='object_path',
876
1445
connection_keyword='connection')
877
1446
def Introspect(self, object_path, connection):
878
"""Standard D-Bus method, overloaded to insert property tags.
1447
"""Overloading of standard D-Bus method.
1448
1449
Inserts property tags and interface annotation tags.
879
1450
"""
880
xmlstring = dbus.service.Object.Introspect(self, object_path,
881
connection)
1451
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1452
object_path,
1453
connection)
882
1454
try:
883
1455
document = xml.dom.minidom.parseString(xmlstring)
1456
884
1457
def make_tag(document, name, prop):
885
1458
e = document.createElement("property")
886
1459
e.setAttribute("name", name)
887
1460
e.setAttribute("type", prop._dbus_signature)
888
1461
e.setAttribute("access", prop._dbus_access)
889
1462
return e
1463
890
1464
for if_tag in document.getElementsByTagName("interface"):
1465
# Add property tags
891
1466
for tag in (make_tag(document, name, prop)
892
1467
for name, prop
893
in self._get_all_dbus_properties()
1468
in self._get_all_dbus_things("property")
894
1469
if prop._dbus_interface
895
1470
== if_tag.getAttribute("name")):
896
1471
if_tag.appendChild(tag)
1472
# Add annotation tags for properties
1473
for tag in if_tag.getElementsByTagName("property"):
1474
annots = dict()
1475
for name, prop in self._get_all_dbus_things(
1476
"property"):
1477
if (name == tag.getAttribute("name")
1478
and prop._dbus_interface
1479
== if_tag.getAttribute("name")):
1480
annots.update(getattr(
1481
prop, "_dbus_annotations", {}))
1482
for name, value in annots.items():
1483
ann_tag = document.createElement(
1484
"annotation")
1485
ann_tag.setAttribute("name", name)
1486
ann_tag.setAttribute("value", value)
1487
tag.appendChild(ann_tag)
897
1488
# Add the names to the return values for the
898
1489
# "org.freedesktop.DBus.Properties" methods
899
1490
if (if_tag.getAttribute("name")
914
1505
except (AttributeError, xml.dom.DOMException,
915
1506
xml.parsers.expat.ExpatError) as error:
916
1507
logger.error("Failed to override Introspection method",
917
error)
918
return xmlstring
919
920
921
def datetime_to_dbus (dt, variant_level=0):
1508
exc_info=error)
1509
return xmlstring
1510
1511
1512
try:
1513
dbus.OBJECT_MANAGER_IFACE
1514
except AttributeError:
1515
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1516
1517
1518
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1519
"""A D-Bus object with an ObjectManager.
1520
1521
Classes inheriting from this exposes the standard
1522
GetManagedObjects call and the InterfacesAdded and
1523
InterfacesRemoved signals on the standard
1524
"org.freedesktop.DBus.ObjectManager" interface.
1525
1526
Note: No signals are sent automatically; they must be sent
1527
manually.
1528
"""
1529
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1530
out_signature="a{oa{sa{sv}}}")
1531
def GetManagedObjects(self):
1532
"""This function must be overridden"""
1533
raise NotImplementedError()
1534
1535
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1536
signature="oa{sa{sv}}")
1537
def InterfacesAdded(self, object_path, interfaces_and_properties):
1538
pass
1539
1540
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1541
def InterfacesRemoved(self, object_path, interfaces):
1542
pass
1543
1544
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1545
out_signature="s",
1546
path_keyword='object_path',
1547
connection_keyword='connection')
1548
def Introspect(self, object_path, connection):
1549
"""Overloading of standard D-Bus method.
1550
1551
Override return argument name of GetManagedObjects to be
1552
"objpath_interfaces_and_properties"
1553
"""
1554
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1555
object_path,
1556
connection)
1557
try:
1558
document = xml.dom.minidom.parseString(xmlstring)
1559
1560
for if_tag in document.getElementsByTagName("interface"):
1561
# Fix argument name for the GetManagedObjects method
1562
if (if_tag.getAttribute("name")
1563
== dbus.OBJECT_MANAGER_IFACE):
1564
for cn in if_tag.getElementsByTagName("method"):
1565
if (cn.getAttribute("name")
1566
== "GetManagedObjects"):
1567
for arg in cn.getElementsByTagName("arg"):
1568
if (arg.getAttribute("direction")
1569
== "out"):
1570
arg.setAttribute(
1571
"name",
1572
"objpath_interfaces"
1573
"_and_properties")
1574
xmlstring = document.toxml("utf-8")
1575
document.unlink()
1576
except (AttributeError, xml.dom.DOMException,
1577
xml.parsers.expat.ExpatError) as error:
1578
logger.error("Failed to override Introspection method",
1579
exc_info=error)
1580
return xmlstring
1581
1582
1583
def datetime_to_dbus(dt, variant_level=0):
922
1584
"""Convert a UTC datetime.datetime() to a D-Bus type."""
923
1585
if dt is None:
924
return dbus.String("", variant_level = variant_level)
925
return dbus.String(dt.isoformat(),
926
variant_level=variant_level)
927
928
929
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
930
.__metaclass__):
931
"""Applied to an empty subclass of a D-Bus object, this metaclass
932
will add additional D-Bus attributes matching a certain pattern.
1586
return dbus.String("", variant_level=variant_level)
1587
return dbus.String(dt.isoformat(), variant_level=variant_level)
1588
1589
1590
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1591
"""A class decorator; applied to a subclass of
1592
dbus.service.Object, it will add alternate D-Bus attributes with
1593
interface names according to the "alt_interface_names" mapping.
1594
Usage:
1595
1596
@alternate_dbus_interfaces({"org.example.Interface":
1597
"net.example.AlternateInterface"})
1598
class SampleDBusObject(dbus.service.Object):
1599
@dbus.service.method("org.example.Interface")
1600
def SampleDBusMethod():
1601
pass
1602
1603
The above "SampleDBusMethod" on "SampleDBusObject" will be
1604
reachable via two interfaces: "org.example.Interface" and
1605
"net.example.AlternateInterface", the latter of which will have
1606
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1607
"true", unless "deprecate" is passed with a False value.
1608
1609
This works for methods and signals, and also for D-Bus properties
1610
(from DBusObjectWithProperties) and interfaces (from the
1611
dbus_interface_annotations decorator).
933
1612
"""
934
def __new__(mcs, name, bases, attr):
935
# Go through all the base classes which could have D-Bus
936
# methods, signals, or properties in them
937
for base in (b for b in bases
938
if issubclass(b, dbus.service.Object)):
939
# Go though all attributes of the base class
940
for attrname, attribute in inspect.getmembers(base):
1613
1614
def wrapper(cls):
1615
for orig_interface_name, alt_interface_name in (
1616
alt_interface_names.items()):
1617
attr = {}
1618
interface_names = set()
1619
# Go though all attributes of the class
1620
for attrname, attribute in inspect.getmembers(cls):
941
1621
# Ignore non-D-Bus attributes, and D-Bus attributes
942
1622
# with the wrong interface name
943
1623
if (not hasattr(attribute, "_dbus_interface")
944
or not attribute._dbus_interface
945
.startswith("se.recompile.Mandos")):
1624
or not attribute._dbus_interface.startswith(
1625
orig_interface_name)):
946
1626
continue
947
1627
# Create an alternate D-Bus interface name based on
948
1628
# the current name
949
alt_interface = (attribute._dbus_interface
950
.replace("se.recompile.Mandos",
951
"se.bsnet.fukt.Mandos"))
1629
alt_interface = attribute._dbus_interface.replace(
1630
orig_interface_name, alt_interface_name)
1631
interface_names.add(alt_interface)
952
1632
# Is this a D-Bus signal?
953
1633
if getattr(attribute, "_dbus_is_signal", False):
954
# Extract the original non-method function by
955
# black magic
956
nonmethod_func = (dict(
1634
# Extract the original non-method undecorated
1635
# function by black magic
1636
if sys.version_info.major == 2:
1637
nonmethod_func = (dict(
957
1638
zip(attribute.func_code.co_freevars,
958
attribute.__closure__))["func"]
959
.cell_contents)
1639
attribute.__closure__))
1640
["func"].cell_contents)
1641
else:
1642
nonmethod_func = (dict(
1643
zip(attribute.__code__.co_freevars,
1644
attribute.__closure__))
1645
["func"].cell_contents)
960
1646
# Create a new, but exactly alike, function
961
1647
# object, and decorate it to be a new D-Bus signal
962
1648
# with the alternate D-Bus interface name
963
new_function = (dbus.service.signal
964
(alt_interface,
965
attribute._dbus_signature)
966
(types.FunctionType(
967
nonmethod_func.func_code,
968
nonmethod_func.func_globals,
969
nonmethod_func.func_name,
970
nonmethod_func.func_defaults,
971
nonmethod_func.func_closure)))
1649
new_function = copy_function(nonmethod_func)
1650
new_function = (dbus.service.signal(
1651
alt_interface,
1652
attribute._dbus_signature)(new_function))
1653
# Copy annotations, if any
1654
try:
1655
new_function._dbus_annotations = dict(
1656
attribute._dbus_annotations)
1657
except AttributeError:
1658
pass
1659
972
1660
# Define a creator of a function to call both the
973
# old and new functions, so both the old and new
974
# signals gets sent when the function is called
1661
# original and alternate functions, so both the
1662
# original and alternate signals gets sent when
1663
# the function is called
975
1664
def fixscope(func1, func2):
976
1665
"""This function is a scope container to pass
977
1666
func1 and func2 to the "call_both" function
978
1667
outside of its arguments"""
1668
1669
@functools.wraps(func2)
979
1670
def call_both(*args, **kwargs):
980
1671
"""This function will emit two D-Bus
981
1672
signals by calling func1 and func2"""
982
1673
func1(*args, **kwargs)
983
1674
func2(*args, **kwargs)
1675
# Make wrapper function look like a D-Bus
1676
# signal
1677
for name, attr in inspect.getmembers(func2):
1678
if name.startswith("_dbus_"):
1679
setattr(call_both, name, attr)
1680
984
1681
return call_both
985
1682
# Create the "call_both" function and add it to
986
1683
# the class
987
attr[attrname] = fixscope(attribute,
988
new_function)
1684
attr[attrname] = fixscope(attribute, new_function)
989
1685
# Is this a D-Bus method?
990
1686
elif getattr(attribute, "_dbus_is_method", False):
991
1687
# Create a new, but exactly alike, function
992
1688
# object. Decorate it to be a new D-Bus method
993
1689
# with the alternate D-Bus interface name. Add it
994
1690
# to the class.
995
attr[attrname] = (dbus.service.method
996
(alt_interface,
997
attribute._dbus_in_signature,
998
attribute._dbus_out_signature)
999
(types.FunctionType
1000
(attribute.func_code,
1001
attribute.func_globals,
1002
attribute.func_name,
1003
attribute.func_defaults,
1004
attribute.func_closure)))
1691
attr[attrname] = (
1692
dbus.service.method(
1693
alt_interface,
1694
attribute._dbus_in_signature,
1695
attribute._dbus_out_signature)
1696
(copy_function(attribute)))
1697
# Copy annotations, if any
1698
try:
1699
attr[attrname]._dbus_annotations = dict(
1700
attribute._dbus_annotations)
1701
except AttributeError:
1702
pass
1005
1703
# Is this a D-Bus property?
1006
1704
elif getattr(attribute, "_dbus_is_property", False):
1007
1705
# Create a new, but exactly alike, function
1008
1706
# object, and decorate it to be a new D-Bus
1009
1707
# property with the alternate D-Bus interface
1010
1708
# name. Add it to the class.
1011
attr[attrname] = (dbus_service_property
1012
(alt_interface,
1013
attribute._dbus_signature,
1014
attribute._dbus_access,
1015
attribute
1016
._dbus_get_args_options
1017
["byte_arrays"])
1018
(types.FunctionType
1019
(attribute.func_code,
1020
attribute.func_globals,
1021
attribute.func_name,
1022
attribute.func_defaults,
1023
attribute.func_closure)))
1024
return type.__new__(mcs, name, bases, attr)
1025
1026
1709
attr[attrname] = (dbus_service_property(
1710
alt_interface, attribute._dbus_signature,
1711
attribute._dbus_access,
1712
attribute._dbus_get_args_options
1713
["byte_arrays"])
1714
(copy_function(attribute)))
1715
# Copy annotations, if any
1716
try:
1717
attr[attrname]._dbus_annotations = dict(
1718
attribute._dbus_annotations)
1719
except AttributeError:
1720
pass
1721
# Is this a D-Bus interface?
1722
elif getattr(attribute, "_dbus_is_interface", False):
1723
# Create a new, but exactly alike, function
1724
# object. Decorate it to be a new D-Bus interface
1725
# with the alternate D-Bus interface name. Add it
1726
# to the class.
1727
attr[attrname] = (
1728
dbus_interface_annotations(alt_interface)
1729
(copy_function(attribute)))
1730
if deprecate:
1731
# Deprecate all alternate interfaces
1732
iname = "_AlternateDBusNames_interface_annotation{}"
1733
for interface_name in interface_names:
1734
1735
@dbus_interface_annotations(interface_name)
1736
def func(self):
1737
return {"org.freedesktop.DBus.Deprecated":
1738
"true"}
1739
# Find an unused name
1740
for aname in (iname.format(i)
1741
for i in itertools.count()):
1742
if aname not in attr:
1743
attr[aname] = func
1744
break
1745
if interface_names:
1746
# Replace the class with a new subclass of it with
1747
# methods, signals, etc. as created above.
1748
if sys.version_info.major == 2:
1749
cls = type(b"{}Alternate".format(cls.__name__),
1750
(cls, ), attr)
1751
else:
1752
cls = type("{}Alternate".format(cls.__name__),
1753
(cls, ), attr)
1754
return cls
1755
1756
return wrapper
1757
1758
1759
@alternate_dbus_interfaces({"se.recompile.Mandos":
1760
"se.bsnet.fukt.Mandos"})
1027
1761
class ClientDBus(Client, DBusObjectWithProperties):
1028
1762
"""A Client class using D-Bus
1029
1763
1030
1764
Attributes:
1031
1765
dbus_object_path: dbus.ObjectPath
1032
1766
bus: dbus.SystemBus()
1033
1767
"""
1034
1768
1035
1769
runtime_expansions = (Client.runtime_expansions
1036
+ ("dbus_object_path",))
1037
1770
+ ("dbus_object_path", ))
1771
1772
_interface = "se.recompile.Mandos.Client"
1773
1038
1774
# dbus.service.Object doesn't use super(), so we can't either.
1039
1040
def __init__(self, bus = None, *args, **kwargs):
1775
1776
def __init__(self, bus=None, *args, **kwargs):
1041
1777
self.bus = bus
1042
1778
Client.__init__(self, *args, **kwargs)
1043
self._approvals_pending = 0
1044
1045
self._approvals_pending = 0
1046
1779
# Only now, when this client is initialized, can it show up on
1047
1780
# the D-Bus
1048
client_object_name = unicode(self.name).translate(
1781
client_object_name = str(self.name).translate(
1049
1782
{ord("."): ord("_"),
1050
1783
ord("-"): ord("_")})
1051
self.dbus_object_path = (dbus.ObjectPath
1052
("/clients/" + client_object_name))
1784
self.dbus_object_path = dbus.ObjectPath(
1785
"/clients/" + client_object_name)
1053
1786
DBusObjectWithProperties.__init__(self, self.bus,
1054
1787
self.dbus_object_path)
1055
1056
def notifychangeproperty(transform_func,
1057
dbus_name, type_func=lambda x: x,
1058
variant_level=1):
1788
1789
def notifychangeproperty(transform_func, dbus_name,
1790
type_func=lambda x: x,
1791
variant_level=1,
1792
invalidate_only=False,
1793
_interface=_interface):
1059
1794
""" Modify a variable so that it's a property which announces
1060
1795
its changes to DBus.
1061
1796
1062
1797
transform_fun: Function that takes a value and a variant_level
1063
1798
and transforms it to a D-Bus type.
1064
1799
dbus_name: D-Bus name of the variable
1066
1801
to the D-Bus. Default: no transform
1067
1802
variant_level: D-Bus variant level. Default: 1
1068
1803
"""
1069
attrname = "_{0}".format(dbus_name)
1804
attrname = "_{}".format(dbus_name)
1805
1070
1806
def setter(self, value):
1071
1807
if hasattr(self, "dbus_object_path"):
1072
1808
if (not hasattr(self, attrname) or
1073
1809
type_func(getattr(self, attrname, None))
1074
1810
!= type_func(value)):
1075
dbus_value = transform_func(type_func(value),
1076
variant_level
1077
=variant_level)
1078
self.PropertyChanged(dbus.String(dbus_name),
1079
dbus_value)
1811
if invalidate_only:
1812
self.PropertiesChanged(
1813
_interface, dbus.Dictionary(),
1814
dbus.Array((dbus_name, )))
1815
else:
1816
dbus_value = transform_func(
1817
type_func(value),
1818
variant_level=variant_level)
1819
self.PropertyChanged(dbus.String(dbus_name),
1820
dbus_value)
1821
self.PropertiesChanged(
1822
_interface,
1823
dbus.Dictionary({dbus.String(dbus_name):
1824
dbus_value}),
1825
dbus.Array())
1080
1826
setattr(self, attrname, value)
1081
1827
1082
1828
return property(lambda self: getattr(self, attrname), setter)
1083
1084
1829
1085
1830
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1086
1831
approvals_pending = notifychangeproperty(dbus.Boolean,
1087
1832
"ApprovalPending",
1088
type_func = bool)
1833
type_func=bool)
1089
1834
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1090
1835
last_enabled = notifychangeproperty(datetime_to_dbus,
1091
1836
"LastEnabled")
1092
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1093
type_func = lambda checker:
1094
checker is not None)
1837
checker = notifychangeproperty(
1838
dbus.Boolean, "CheckerRunning",
1839
type_func=lambda checker: checker is not None)
1095
1840
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1096
1841
"LastCheckedOK")
1842
last_checker_status = notifychangeproperty(dbus.Int16,
1843
"LastCheckerStatus")
1097
1844
last_approval_request = notifychangeproperty(
1098
1845
datetime_to_dbus, "LastApprovalRequest")
1099
1846
approved_by_default = notifychangeproperty(dbus.Boolean,
1100
1847
"ApprovedByDefault")
1101
approval_delay = notifychangeproperty(dbus.UInt64,
1102
"ApprovalDelay",
1103
type_func =
1104
timedelta_to_milliseconds)
1848
approval_delay = notifychangeproperty(
1849
dbus.UInt64, "ApprovalDelay",
1850
type_func=lambda td: td.total_seconds() * 1000)
1105
1851
approval_duration = notifychangeproperty(
1106
1852
dbus.UInt64, "ApprovalDuration",
1107
type_func = timedelta_to_milliseconds)
1853
type_func=lambda td: td.total_seconds() * 1000)
1108
1854
host = notifychangeproperty(dbus.String, "Host")
1109
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1110
type_func =
1111
timedelta_to_milliseconds)
1855
timeout = notifychangeproperty(
1856
dbus.UInt64, "Timeout",
1857
type_func=lambda td: td.total_seconds() * 1000)
1112
1858
extended_timeout = notifychangeproperty(
1113
1859
dbus.UInt64, "ExtendedTimeout",
1114
type_func = timedelta_to_milliseconds)
1115
interval = notifychangeproperty(dbus.UInt64,
1116
"Interval",
1117
type_func =
1118
timedelta_to_milliseconds)
1860
type_func=lambda td: td.total_seconds() * 1000)
1861
interval = notifychangeproperty(
1862
dbus.UInt64, "Interval",
1863
type_func=lambda td: td.total_seconds() * 1000)
1119
1864
checker_command = notifychangeproperty(dbus.String, "Checker")
1120
1865
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1866
invalidate_only=True)
1867
1121
1868
del notifychangeproperty
1122
1869
1123
1870
def __del__(self, *args, **kwargs):
1124
1871
try:
1125
1872
self.remove_from_connection()
1128
1875
if hasattr(DBusObjectWithProperties, "__del__"):
1129
1876
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1130
1877
Client.__del__(self, *args, **kwargs)
1131
1132
def checker_callback(self, pid, condition, command,
1133
*args, **kwargs):
1134
self.checker_callback_tag = None
1135
self.checker = None
1136
if os.WIFEXITED(condition):
1137
exitstatus = os.WEXITSTATUS(condition)
1878
1879
def checker_callback(self, source, condition,
1880
connection, command, *args, **kwargs):
1881
ret = Client.checker_callback(self, source, condition,
1882
connection, command, *args,
1883
**kwargs)
1884
exitstatus = self.last_checker_status
1885
if exitstatus >= 0:
1138
1886
# Emit D-Bus signal
1139
1887
self.CheckerCompleted(dbus.Int16(exitstatus),
1140
dbus.Int64(condition),
1888
# This is specific to GNU libC
1889
dbus.Int64(exitstatus << 8),
1141
1890
dbus.String(command))
1142
1891
else:
1143
1892
# Emit D-Bus signal
1144
1893
self.CheckerCompleted(dbus.Int16(-1),
1145
dbus.Int64(condition),
1894
dbus.Int64(
1895
# This is specific to GNU libC
1896
(exitstatus << 8)
1897
| self.last_checker_signal),
1146
1898
dbus.String(command))
1147
1148
return Client.checker_callback(self, pid, condition, command,
1149
*args, **kwargs)
1150
1899
return ret
1900
1151
1901
def start_checker(self, *args, **kwargs):
1152
old_checker = self.checker
1153
if self.checker is not None:
1154
old_checker_pid = self.checker.pid
1155
else:
1156
old_checker_pid = None
1902
old_checker_pid = getattr(self.checker, "pid", None)
1157
1903
r = Client.start_checker(self, *args, **kwargs)
1158
1904
# Only if new checker process was started
1159
1905
if (self.checker is not None
1161
1907
# Emit D-Bus signal
1162
1908
self.CheckerStarted(self.current_checker_command)
1163
1909
return r
1164
1910
1165
1911
def _reset_approved(self):
1166
1912
self.approved = None
1167
1913
return False
1168
1914
1169
1915
def approve(self, value=True):
1170
self.send_changedstate()
1171
1916
self.approved = value
1172
gobject.timeout_add(timedelta_to_milliseconds
1173
(self.approval_duration),
1174
self._reset_approved)
1175
1176
1177
## D-Bus methods, signals & properties
1178
_interface = "se.recompile.Mandos.Client"
1179
1180
## Signals
1181
1917
GLib.timeout_add(int(self.approval_duration.total_seconds()
1918
* 1000), self._reset_approved)
1919
self.send_changedstate()
1920
1921
# D-Bus methods, signals & properties
1922
1923
# Interfaces
1924
1925
# Signals
1926
1182
1927
# CheckerCompleted - signal
1183
1928
@dbus.service.signal(_interface, signature="nxs")
1184
1929
def CheckerCompleted(self, exitcode, waitstatus, command):
1185
1930
"D-Bus signal"
1186
1931
pass
1187
1932
1188
1933
# CheckerStarted - signal
1189
1934
@dbus.service.signal(_interface, signature="s")
1190
1935
def CheckerStarted(self, command):
1191
1936
"D-Bus signal"
1192
1937
pass
1193
1938
1194
1939
# PropertyChanged - signal
1940
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1195
1941
@dbus.service.signal(_interface, signature="sv")
1196
1942
def PropertyChanged(self, property, value):
1197
1943
"D-Bus signal"
1198
1944
pass
1199
1945
1200
1946
# GotSecret - signal
1201
1947
@dbus.service.signal(_interface)
1202
1948
def GotSecret(self):
1205
1951
server to mandos-client
1206
1952
"""
1207
1953
pass
1208
1954
1209
1955
# Rejected - signal
1210
1956
@dbus.service.signal(_interface, signature="s")
1211
1957
def Rejected(self, reason):
1212
1958
"D-Bus signal"
1213
1959
pass
1214
1960
1215
1961
# NeedApproval - signal
1216
1962
@dbus.service.signal(_interface, signature="tb")
1217
1963
def NeedApproval(self, timeout, default):
1218
1964
"D-Bus signal"
1219
1965
return self.need_approval()
1220
1221
# NeRwequest - signal
1222
@dbus.service.signal(_interface, signature="s")
1223
def NewRequest(self, ip):
1224
"""D-Bus signal
1225
Is sent after a client request a password.
1226
"""
1227
pass
1228
1229
## Methods
1230
1966
1967
# Methods
1968
1231
1969
# Approve - method
1232
1970
@dbus.service.method(_interface, in_signature="b")
1233
1971
def Approve(self, value):
1234
1972
self.approve(value)
1235
1973
1236
1974
# CheckedOK - method
1237
1975
@dbus.service.method(_interface)
1238
1976
def CheckedOK(self):
1239
1977
self.checked_ok()
1240
1978
1241
1979
# Enable - method
1980
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1242
1981
@dbus.service.method(_interface)
1243
1982
def Enable(self):
1244
1983
"D-Bus method"
1245
1984
self.enable()
1246
1985
1247
1986
# StartChecker - method
1987
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1248
1988
@dbus.service.method(_interface)
1249
1989
def StartChecker(self):
1250
1990
"D-Bus method"
1251
1991
self.start_checker()
1252
1992
1253
1993
# Disable - method
1994
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1254
1995
@dbus.service.method(_interface)
1255
1996
def Disable(self):
1256
1997
"D-Bus method"
1257
1998
self.disable()
1258
1999
1259
2000
# StopChecker - method
2001
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1260
2002
@dbus.service.method(_interface)
1261
2003
def StopChecker(self):
1262
2004
self.stop_checker()
1263
1264
## Properties
1265
2005
2006
# Properties
2007
1266
2008
# ApprovalPending - property
1267
2009
@dbus_service_property(_interface, signature="b", access="read")
1268
2010
def ApprovalPending_dbus_property(self):
1269
2011
return dbus.Boolean(bool(self.approvals_pending))
1270
2012
1271
2013
# ApprovedByDefault - property
1272
@dbus_service_property(_interface, signature="b",
2014
@dbus_service_property(_interface,
2015
signature="b",
1273
2016
access="readwrite")
1274
2017
def ApprovedByDefault_dbus_property(self, value=None):
1275
2018
if value is None: # get
1276
2019
return dbus.Boolean(self.approved_by_default)
1277
2020
self.approved_by_default = bool(value)
1278
2021
1279
2022
# ApprovalDelay - property
1280
@dbus_service_property(_interface, signature="t",
2023
@dbus_service_property(_interface,
2024
signature="t",
1281
2025
access="readwrite")
1282
2026
def ApprovalDelay_dbus_property(self, value=None):
1283
2027
if value is None: # get
1284
return dbus.UInt64(self.approval_delay_milliseconds())
2028
return dbus.UInt64(self.approval_delay.total_seconds()
2029
* 1000)
1285
2030
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1286
2031
1287
2032
# ApprovalDuration - property
1288
@dbus_service_property(_interface, signature="t",
2033
@dbus_service_property(_interface,
2034
signature="t",
1289
2035
access="readwrite")
1290
2036
def ApprovalDuration_dbus_property(self, value=None):
1291
2037
if value is None: # get
1292
return dbus.UInt64(timedelta_to_milliseconds(
1293
self.approval_duration))
2038
return dbus.UInt64(self.approval_duration.total_seconds()
2039
* 1000)
1294
2040
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1295
2041
1296
2042
# Name - property
2043
@dbus_annotations(
2044
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1297
2045
@dbus_service_property(_interface, signature="s", access="read")
1298
2046
def Name_dbus_property(self):
1299
2047
return dbus.String(self.name)
1300
2048
2049
# KeyID - property
2050
@dbus_annotations(
2051
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2052
@dbus_service_property(_interface, signature="s", access="read")
2053
def KeyID_dbus_property(self):
2054
return dbus.String(self.key_id)
2055
1301
2056
# Fingerprint - property
2057
@dbus_annotations(
2058
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1302
2059
@dbus_service_property(_interface, signature="s", access="read")
1303
2060
def Fingerprint_dbus_property(self):
1304
2061
return dbus.String(self.fingerprint)
1305
2062
1306
2063
# Host - property
1307
@dbus_service_property(_interface, signature="s",
2064
@dbus_service_property(_interface,
2065
signature="s",
1308
2066
access="readwrite")
1309
2067
def Host_dbus_property(self, value=None):
1310
2068
if value is None: # get
1311
2069
return dbus.String(self.host)
1312
self.host = unicode(value)
1313
2070
self.host = str(value)
2071
1314
2072
# Created - property
2073
@dbus_annotations(
2074
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1315
2075
@dbus_service_property(_interface, signature="s", access="read")
1316
2076
def Created_dbus_property(self):
1317
2077
return datetime_to_dbus(self.created)
1318
2078
1319
2079
# LastEnabled - property
1320
2080
@dbus_service_property(_interface, signature="s", access="read")
1321
2081
def LastEnabled_dbus_property(self):
1322
2082
return datetime_to_dbus(self.last_enabled)
1323
2083
1324
2084
# Enabled - property
1325
@dbus_service_property(_interface, signature="b",
2085
@dbus_service_property(_interface,
2086
signature="b",
1326
2087
access="readwrite")
1327
2088
def Enabled_dbus_property(self, value=None):
1328
2089
if value is None: # get
1331
2092
self.enable()
1332
2093
else:
1333
2094
self.disable()
1334
2095
1335
2096
# LastCheckedOK - property
1336
@dbus_service_property(_interface, signature="s",
2097
@dbus_service_property(_interface,
2098
signature="s",
1337
2099
access="readwrite")
1338
2100
def LastCheckedOK_dbus_property(self, value=None):
1339
2101
if value is not None:
1340
2102
self.checked_ok()
1341
2103
return
1342
2104
return datetime_to_dbus(self.last_checked_ok)
1343
2105
2106
# LastCheckerStatus - property
2107
@dbus_service_property(_interface, signature="n", access="read")
2108
def LastCheckerStatus_dbus_property(self):
2109
return dbus.Int16(self.last_checker_status)
2110
1344
2111
# Expires - property
1345
2112
@dbus_service_property(_interface, signature="s", access="read")
1346
2113
def Expires_dbus_property(self):
1347
2114
return datetime_to_dbus(self.expires)
1348
2115
1349
2116
# LastApprovalRequest - property
1350
2117
@dbus_service_property(_interface, signature="s", access="read")
1351
2118
def LastApprovalRequest_dbus_property(self):
1352
2119
return datetime_to_dbus(self.last_approval_request)
1353
2120
1354
2121
# Timeout - property
1355
@dbus_service_property(_interface, signature="t",
2122
@dbus_service_property(_interface,
2123
signature="t",
1356
2124
access="readwrite")
1357
2125
def Timeout_dbus_property(self, value=None):
1358
2126
if value is None: # get
1359
return dbus.UInt64(self.timeout_milliseconds())
2127
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2128
old_timeout = self.timeout
1360
2129
self.timeout = datetime.timedelta(0, 0, 0, value)
1361
if getattr(self, "disable_initiator_tag", None) is None:
1362
return
1363
# Reschedule timeout
1364
gobject.source_remove(self.disable_initiator_tag)
1365
self.disable_initiator_tag = None
1366
self.expires = None
1367
time_to_die = timedelta_to_milliseconds((self
1368
.last_checked_ok
1369
+ self.timeout)
1370
- datetime.datetime
1371
.utcnow())
1372
if time_to_die <= 0:
1373
# The timeout has passed
1374
self.disable()
1375
else:
1376
self.expires = (datetime.datetime.utcnow()
1377
+ datetime.timedelta(milliseconds =
1378
time_to_die))
1379
self.disable_initiator_tag = (gobject.timeout_add
1380
(time_to_die, self.disable))
1381
2130
# Reschedule disabling
2131
if self.enabled:
2132
now = datetime.datetime.utcnow()
2133
self.expires += self.timeout - old_timeout
2134
if self.expires <= now:
2135
# The timeout has passed
2136
self.disable()
2137
else:
2138
if (getattr(self, "disable_initiator_tag", None)
2139
is None):
2140
return
2141
GLib.source_remove(self.disable_initiator_tag)
2142
self.disable_initiator_tag = GLib.timeout_add(
2143
int((self.expires - now).total_seconds() * 1000),
2144
self.disable)
2145
1382
2146
# ExtendedTimeout - property
1383
@dbus_service_property(_interface, signature="t",
2147
@dbus_service_property(_interface,
2148
signature="t",
1384
2149
access="readwrite")
1385
2150
def ExtendedTimeout_dbus_property(self, value=None):
1386
2151
if value is None: # get
1387
return dbus.UInt64(self.extended_timeout_milliseconds())
2152
return dbus.UInt64(self.extended_timeout.total_seconds()
2153
* 1000)
1388
2154
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1389
2155
1390
2156
# Interval - property
1391
@dbus_service_property(_interface, signature="t",
2157
@dbus_service_property(_interface,
2158
signature="t",
1392
2159
access="readwrite")
1393
2160
def Interval_dbus_property(self, value=None):
1394
2161
if value is None: # get
1395
return dbus.UInt64(self.interval_milliseconds())
2162
return dbus.UInt64(self.interval.total_seconds() * 1000)
1396
2163
self.interval = datetime.timedelta(0, 0, 0, value)
1397
2164
if getattr(self, "checker_initiator_tag", None) is None:
1398
2165
return
1399
2166
if self.enabled:
1400
2167
# Reschedule checker run
1401
gobject.source_remove(self.checker_initiator_tag)
1402
self.checker_initiator_tag = (gobject.timeout_add
1403
(value, self.start_checker))
1404
self.start_checker() # Start one now, too
1405
2168
GLib.source_remove(self.checker_initiator_tag)
2169
self.checker_initiator_tag = GLib.timeout_add(
2170
value, self.start_checker)
2171
self.start_checker() # Start one now, too
2172
1406
2173
# Checker - property
1407
@dbus_service_property(_interface, signature="s",
2174
@dbus_service_property(_interface,
2175
signature="s",
1408
2176
access="readwrite")
1409
2177
def Checker_dbus_property(self, value=None):
1410
2178
if value is None: # get
1411
2179
return dbus.String(self.checker_command)
1412
self.checker_command = unicode(value)
1413
2180
self.checker_command = str(value)
2181
1414
2182
# CheckerRunning - property
1415
@dbus_service_property(_interface, signature="b",
2183
@dbus_service_property(_interface,
2184
signature="b",
1416
2185
access="readwrite")
1417
2186
def CheckerRunning_dbus_property(self, value=None):
1418
2187
if value is None: # get
1421
2190
self.start_checker()
1422
2191
else:
1423
2192
self.stop_checker()
1424
2193
1425
2194
# ObjectPath - property
2195
@dbus_annotations(
2196
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2197
"org.freedesktop.DBus.Deprecated": "true"})
1426
2198
@dbus_service_property(_interface, signature="o", access="read")
1427
2199
def ObjectPath_dbus_property(self):
1428
return self.dbus_object_path # is already a dbus.ObjectPath
1429
2200
return self.dbus_object_path # is already a dbus.ObjectPath
2201
1430
2202
# Secret = property
1431
@dbus_service_property(_interface, signature="ay",
1432
access="write", byte_arrays=True)
2203
@dbus_annotations(
2204
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2205
"invalidates"})
2206
@dbus_service_property(_interface,
2207
signature="ay",
2208
access="write",
2209
byte_arrays=True)
1433
2210
def Secret_dbus_property(self, value):
1434
self.secret = str(value)
1435
2211
self.secret = bytes(value)
2212
1436
2213
del _interface
1437
2214
1438
2215
1439
2216
class ProxyClient(object):
1440
def __init__(self, child_pipe, fpr, address):
2217
def __init__(self, child_pipe, key_id, fpr, address):
1441
2218
self._pipe = child_pipe
1442
self._pipe.send(('init', fpr, address))
2219
self._pipe.send(('init', key_id, fpr, address))
1443
2220
if not self._pipe.recv():
1444
raise KeyError()
1445
2221
raise KeyError(key_id or fpr)
2222
1446
2223
def __getattribute__(self, name):
1447
2224
if name == '_pipe':
1448
2225
return super(ProxyClient, self).__getattribute__(name)
1451
2228
if data[0] == 'data':
1452
2229
return data[1]
1453
2230
if data[0] == 'function':
2231
1454
2232
def func(*args, **kwargs):
1455
2233
self._pipe.send(('funcall', name, args, kwargs))
1456
2234
return self._pipe.recv()[1]
2235
1457
2236
return func
1458
2237
1459
2238
def __setattr__(self, name, value):
1460
2239
if name == '_pipe':
1461
2240
return super(ProxyClient, self).__setattr__(name, value)
1462
2241
self._pipe.send(('setattr', name, value))
1463
2242
1464
2243
1465
class ClientDBusTransitional(ClientDBus):
1466
__metaclass__ = AlternateDBusNamesMetaclass
1467
1468
1469
2244
class ClientHandler(socketserver.BaseRequestHandler, object):
1470
2245
"""A class to handle client connections.
1471
2246
1472
2247
Instantiated once for each connection to handle it.
1473
2248
Note: This will run in its own forked process."""
1474
2249
1475
2250
def handle(self):
1476
2251
with contextlib.closing(self.server.child_pipe) as child_pipe:
1477
2252
logger.info("TCP connection from: %s",
1478
unicode(self.client_address))
2253
str(self.client_address))
1479
2254
logger.debug("Pipe FD: %d",
1480
2255
self.server.child_pipe.fileno())
1481
1482
session = (gnutls.connection
1483
.ClientSession(self.request,
1484
gnutls.connection
1485
.X509Credentials()))
1486
1487
# Note: gnutls.connection.X509Credentials is really a
1488
# generic GnuTLS certificate credentials object so long as
1489
# no X.509 keys are added to it. Therefore, we can use it
1490
# here despite using OpenPGP certificates.
1491
1492
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1493
# "+AES-256-CBC", "+SHA1",
1494
# "+COMP-NULL", "+CTYPE-OPENPGP",
1495
# "+DHE-DSS"))
2256
2257
session = gnutls.ClientSession(self.request)
2258
2259
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2260
# "+AES-256-CBC", "+SHA1",
2261
# "+COMP-NULL", "+CTYPE-OPENPGP",
2262
# "+DHE-DSS"))
1496
2263
# Use a fallback default, since this MUST be set.
1497
2264
priority = self.server.gnutls_priority
1498
2265
if priority is None:
1499
2266
priority = "NORMAL"
1500
(gnutls.library.functions
1501
.gnutls_priority_set_direct(session._c_object,
1502
priority, None))
1503
2267
gnutls.priority_set_direct(session._c_object,
2268
priority.encode("utf-8"),
2269
None)
2270
1504
2271
# Start communication using the Mandos protocol
1505
2272
# Get protocol number
1506
2273
line = self.request.makefile().readline()
1507
2274
logger.debug("Protocol version: %r", line)
1508
2275
try:
1509
2276
if int(line.strip().split()[0]) > 1:
1510
raise RuntimeError
2277
raise RuntimeError(line)
1511
2278
except (ValueError, IndexError, RuntimeError) as error:
1512
2279
logger.error("Unknown protocol version: %s", error)
1513
2280
return
1514
2281
1515
2282
# Start GnuTLS connection
1516
2283
try:
1517
2284
session.handshake()
1518
except gnutls.errors.GNUTLSError as error:
2285
except gnutls.Error as error:
1519
2286
logger.warning("Handshake failed: %s", error)
1520
2287
# Do not run session.bye() here: the session is not
1521
2288
# established. Just abandon the request.
1522
2289
return
1523
2290
logger.debug("Handshake succeeded")
1524
2291
1525
2292
approval_required = False
1526
2293
try:
1527
try:
1528
fpr = self.fingerprint(self.peer_certificate
1529
(session))
1530
except (TypeError,
1531
gnutls.errors.GNUTLSError) as error:
1532
logger.warning("Bad certificate: %s", error)
1533
return
1534
logger.debug("Fingerprint: %s", fpr)
1535
1536
try:
1537
client = ProxyClient(child_pipe, fpr,
2294
if gnutls.has_rawpk:
2295
fpr = b""
2296
try:
2297
key_id = self.key_id(
2298
self.peer_certificate(session))
2299
except (TypeError, gnutls.Error) as error:
2300
logger.warning("Bad certificate: %s", error)
2301
return
2302
logger.debug("Key ID: %s", key_id)
2303
2304
else:
2305
key_id = b""
2306
try:
2307
fpr = self.fingerprint(
2308
self.peer_certificate(session))
2309
except (TypeError, gnutls.Error) as error:
2310
logger.warning("Bad certificate: %s", error)
2311
return
2312
logger.debug("Fingerprint: %s", fpr)
2313
2314
try:
2315
client = ProxyClient(child_pipe, key_id, fpr,
1538
2316
self.client_address)
1539
2317
except KeyError:
1540
2318
return
1541
1542
if self.server.use_dbus:
1543
# Emit D-Bus signal
1544
client.NewRequest(str(self.client_address))
1545
2319
1546
2320
if client.approval_delay:
1547
2321
delay = client.approval_delay
1548
2322
client.approvals_pending += 1
1549
2323
approval_required = True
1550
2324
1551
2325
while True:
1552
2326
if not client.enabled:
1553
2327
logger.info("Client %s is disabled",
1554
client.name)
2328
client.name)
1555
2329
if self.server.use_dbus:
1556
2330
# Emit D-Bus signal
1557
2331
client.Rejected("Disabled")
1558
2332
return
1559
2333
1560
2334
if client.approved or not client.approval_delay:
1561
#We are approved or approval is disabled
2335
# We are approved or approval is disabled
1562
2336
break
1563
2337
elif client.approved is None:
1564
2338
logger.info("Client %s needs approval",
1566
2340
if self.server.use_dbus:
1567
2341
# Emit D-Bus signal
1568
2342
client.NeedApproval(
1569
client.approval_delay_milliseconds(),
1570
client.approved_by_default)
2343
client.approval_delay.total_seconds()
2344
* 1000, client.approved_by_default)
1571
2345
else:
1572
2346
logger.warning("Client %s was not approved",
1573
2347
client.name)
1575
2349
# Emit D-Bus signal
1576
2350
client.Rejected("Denied")
1577
2351
return
1578
1579
#wait until timeout or approved
2352
2353
# wait until timeout or approved
1580
2354
time = datetime.datetime.now()
1581
2355
client.changedstate.acquire()
1582
(client.changedstate.wait
1583
(float(client.timedelta_to_milliseconds(delay)
1584
/ 1000)))
2356
client.changedstate.wait(delay.total_seconds())
1585
2357
client.changedstate.release()
1586
2358
time2 = datetime.datetime.now()
1587
2359
if (time2 - time) >= delay:
1597
2369
break
1598
2370
else:
1599
2371
delay -= time2 - time
1600
1601
sent_size = 0
1602
while sent_size < len(client.secret):
1603
try:
1604
sent = session.send(client.secret[sent_size:])
1605
except gnutls.errors.GNUTLSError as error:
1606
logger.warning("gnutls send failed")
1607
return
1608
logger.debug("Sent: %d, remaining: %d",
1609
sent, len(client.secret)
1610
- (sent_size + sent))
1611
sent_size += sent
1612
2372
2373
try:
2374
session.send(client.secret)
2375
except gnutls.Error as error:
2376
logger.warning("gnutls send failed",
2377
exc_info=error)
2378
return
2379
1613
2380
logger.info("Sending secret to %s", client.name)
1614
2381
# bump the timeout using extended_timeout
1615
client.checked_ok(client.extended_timeout)
2382
client.bump_timeout(client.extended_timeout)
1616
2383
if self.server.use_dbus:
1617
2384
# Emit D-Bus signal
1618
2385
client.GotSecret()
1619
2386
1620
2387
finally:
1621
2388
if approval_required:
1622
2389
client.approvals_pending -= 1
1623
2390
try:
1624
2391
session.bye()
1625
except gnutls.errors.GNUTLSError as error:
1626
logger.warning("GnuTLS bye failed")
1627
2392
except gnutls.Error as error:
2393
logger.warning("GnuTLS bye failed",
2394
exc_info=error)
2395
1628
2396
@staticmethod
1629
2397
def peer_certificate(session):
1630
"Return the peer's OpenPGP certificate as a bytestring"
1631
# If not an OpenPGP certificate...
1632
if (gnutls.library.functions
1633
.gnutls_certificate_type_get(session._c_object)
1634
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1635
# ...do the normal thing
1636
return session.peer_certificate
2398
"Return the peer's certificate as a bytestring"
2399
try:
2400
cert_type = gnutls.certificate_type_get2(session._c_object,
2401
gnutls.CTYPE_PEERS)
2402
except AttributeError:
2403
cert_type = gnutls.certificate_type_get(session._c_object)
2404
if gnutls.has_rawpk:
2405
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2406
else:
2407
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2408
# If not a valid certificate type...
2409
if cert_type not in valid_cert_types:
2410
logger.info("Cert type %r not in %r", cert_type,
2411
valid_cert_types)
2412
# ...return invalid data
2413
return b""
1637
2414
list_size = ctypes.c_uint(1)
1638
cert_list = (gnutls.library.functions
1639
.gnutls_certificate_get_peers
2415
cert_list = (gnutls.certificate_get_peers
1640
2416
(session._c_object, ctypes.byref(list_size)))
1641
2417
if not bool(cert_list) and list_size.value != 0:
1642
raise gnutls.errors.GNUTLSError("error getting peer"
1643
" certificate")
2418
raise gnutls.Error("error getting peer certificate")
1644
2419
if list_size.value == 0:
1645
2420
return None
1646
2421
cert = cert_list[0]
1647
2422
return ctypes.string_at(cert.data, cert.size)
1648
2423
2424
@staticmethod
2425
def key_id(certificate):
2426
"Convert a certificate bytestring to a hexdigit key ID"
2427
# New GnuTLS "datum" with the public key
2428
datum = gnutls.datum_t(
2429
ctypes.cast(ctypes.c_char_p(certificate),
2430
ctypes.POINTER(ctypes.c_ubyte)),
2431
ctypes.c_uint(len(certificate)))
2432
# XXX all these need to be created in the gnutls "module"
2433
# New empty GnuTLS certificate
2434
pubkey = gnutls.pubkey_t()
2435
gnutls.pubkey_init(ctypes.byref(pubkey))
2436
# Import the raw public key into the certificate
2437
gnutls.pubkey_import(pubkey,
2438
ctypes.byref(datum),
2439
gnutls.X509_FMT_DER)
2440
# New buffer for the key ID
2441
buf = ctypes.create_string_buffer(32)
2442
buf_len = ctypes.c_size_t(len(buf))
2443
# Get the key ID from the raw public key into the buffer
2444
gnutls.pubkey_get_key_id(pubkey,
2445
gnutls.KEYID_USE_SHA256,
2446
ctypes.cast(ctypes.byref(buf),
2447
ctypes.POINTER(ctypes.c_ubyte)),
2448
ctypes.byref(buf_len))
2449
# Deinit the certificate
2450
gnutls.pubkey_deinit(pubkey)
2451
2452
# Convert the buffer to a Python bytestring
2453
key_id = ctypes.string_at(buf, buf_len.value)
2454
# Convert the bytestring to hexadecimal notation
2455
hex_key_id = binascii.hexlify(key_id).upper()
2456
return hex_key_id
2457
1649
2458
@staticmethod
1650
2459
def fingerprint(openpgp):
1651
2460
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1652
2461
# New GnuTLS "datum" with the OpenPGP public key
1653
datum = (gnutls.library.types
1654
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1655
ctypes.POINTER
1656
(ctypes.c_ubyte)),
1657
ctypes.c_uint(len(openpgp))))
2462
datum = gnutls.datum_t(
2463
ctypes.cast(ctypes.c_char_p(openpgp),
2464
ctypes.POINTER(ctypes.c_ubyte)),
2465
ctypes.c_uint(len(openpgp)))
1658
2466
# New empty GnuTLS certificate
1659
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1660
(gnutls.library.functions
1661
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2467
crt = gnutls.openpgp_crt_t()
2468
gnutls.openpgp_crt_init(ctypes.byref(crt))
1662
2469
# Import the OpenPGP public key into the certificate
1663
(gnutls.library.functions
1664
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1665
gnutls.library.constants
1666
.GNUTLS_OPENPGP_FMT_RAW))
2470
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2471
gnutls.OPENPGP_FMT_RAW)
1667
2472
# Verify the self signature in the key
1668
2473
crtverify = ctypes.c_uint()
1669
(gnutls.library.functions
1670
.gnutls_openpgp_crt_verify_self(crt, 0,
1671
ctypes.byref(crtverify)))
2474
gnutls.openpgp_crt_verify_self(crt, 0,
2475
ctypes.byref(crtverify))
1672
2476
if crtverify.value != 0:
1673
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1674
raise (gnutls.errors.CertificateSecurityError
1675
("Verify failed"))
2477
gnutls.openpgp_crt_deinit(crt)
2478
raise gnutls.CertificateSecurityError(code
2479
=crtverify.value)
1676
2480
# New buffer for the fingerprint
1677
2481
buf = ctypes.create_string_buffer(20)
1678
2482
buf_len = ctypes.c_size_t()
1679
2483
# Get the fingerprint from the certificate into the buffer
1680
(gnutls.library.functions
1681
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1682
ctypes.byref(buf_len)))
2484
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2485
ctypes.byref(buf_len))
1683
2486
# Deinit the certificate
1684
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2487
gnutls.openpgp_crt_deinit(crt)
1685
2488
# Convert the buffer to a Python bytestring
1686
2489
fpr = ctypes.string_at(buf, buf_len.value)
1687
2490
# Convert the bytestring to hexadecimal notation
1691
2494
1692
2495
class MultiprocessingMixIn(object):
1693
2496
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2497
1694
2498
def sub_process_main(self, request, address):
1695
2499
try:
1696
2500
self.finish_request(request, address)
1697
2501
except Exception:
1698
2502
self.handle_error(request, address)
1699
2503
self.close_request(request)
1700
2504
1701
2505
def process_request(self, request, address):
1702
2506
"""Start a new process to process the request."""
1703
proc = multiprocessing.Process(target = self.sub_process_main,
1704
args = (request,
1705
address))
2507
proc = multiprocessing.Process(target=self.sub_process_main,
2508
args=(request, address))
1706
2509
proc.start()
1707
2510
return proc
1708
2511
1709
2512
1710
2513
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1711
2514
""" adds a pipe to the MixIn """
2515
1712
2516
def process_request(self, request, client_address):
1713
2517
"""Overrides and wraps the original process_request().
1714
2518
1715
2519
This function creates a new pipe in self.pipe
1716
2520
"""
1717
2521
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1718
2522
1719
2523
proc = MultiprocessingMixIn.process_request(self, request,
1720
2524
client_address)
1721
2525
self.child_pipe.close()
1722
2526
self.add_pipe(parent_pipe, proc)
1723
2527
1724
2528
def add_pipe(self, parent_pipe, proc):
1725
2529
"""Dummy function; override as necessary"""
1726
raise NotImplementedError
2530
raise NotImplementedError()
1727
2531
1728
2532
1729
2533
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1730
2534
socketserver.TCPServer, object):
1731
2535
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1732
2536
1733
2537
Attributes:
1734
2538
enabled: Boolean; whether this server is activated yet
1735
2539
interface: None or a network interface name (string)
1736
2540
use_ipv6: Boolean; to use IPv6 or not
1737
2541
"""
2542
1738
2543
def __init__(self, server_address, RequestHandlerClass,
1739
interface=None, use_ipv6=True):
2544
interface=None,
2545
use_ipv6=True,
2546
socketfd=None):
2547
"""If socketfd is set, use that file descriptor instead of
2548
creating a new one with socket.socket().
2549
"""
1740
2550
self.interface = interface
1741
2551
if use_ipv6:
1742
2552
self.address_family = socket.AF_INET6
2553
if socketfd is not None:
2554
# Save the file descriptor
2555
self.socketfd = socketfd
2556
# Save the original socket.socket() function
2557
self.socket_socket = socket.socket
2558
2559
# To implement --socket, we monkey patch socket.socket.
2560
#
2561
# (When socketserver.TCPServer is a new-style class, we
2562
# could make self.socket into a property instead of monkey
2563
# patching socket.socket.)
2564
#
2565
# Create a one-time-only replacement for socket.socket()
2566
@functools.wraps(socket.socket)
2567
def socket_wrapper(*args, **kwargs):
2568
# Restore original function so subsequent calls are
2569
# not affected.
2570
socket.socket = self.socket_socket
2571
del self.socket_socket
2572
# This time only, return a new socket object from the
2573
# saved file descriptor.
2574
return socket.fromfd(self.socketfd, *args, **kwargs)
2575
# Replace socket.socket() function with wrapper
2576
socket.socket = socket_wrapper
2577
# The socketserver.TCPServer.__init__ will call
2578
# socket.socket(), which might be our replacement,
2579
# socket_wrapper(), if socketfd was set.
1743
2580
socketserver.TCPServer.__init__(self, server_address,
1744
2581
RequestHandlerClass)
2582
1745
2583
def server_bind(self):
1746
2584
"""This overrides the normal server_bind() function
1747
2585
to bind to an interface if one was specified, and also NOT to
1748
2586
bind to an address or port if they were not specified."""
2587
global SO_BINDTODEVICE
1749
2588
if self.interface is not None:
1750
2589
if SO_BINDTODEVICE is None:
1751
logger.error("SO_BINDTODEVICE does not exist;"
1752
" cannot bind to interface %s",
1753
self.interface)
1754
else:
1755
try:
1756
self.socket.setsockopt(socket.SOL_SOCKET,
1757
SO_BINDTODEVICE,
1758
str(self.interface
1759
+ '\0'))
1760
except socket.error as error:
1761
if error[0] == errno.EPERM:
1762
logger.error("No permission to"
1763
" bind to interface %s",
1764
self.interface)
1765
elif error[0] == errno.ENOPROTOOPT:
1766
logger.error("SO_BINDTODEVICE not available;"
1767
" cannot bind to interface %s",
1768
self.interface)
1769
else:
1770
raise
2590
# Fall back to a hard-coded value which seems to be
2591
# common enough.
2592
logger.warning("SO_BINDTODEVICE not found, trying 25")
2593
SO_BINDTODEVICE = 25
2594
try:
2595
self.socket.setsockopt(
2596
socket.SOL_SOCKET, SO_BINDTODEVICE,
2597
(self.interface + "\0").encode("utf-8"))
2598
except socket.error as error:
2599
if error.errno == errno.EPERM:
2600
logger.error("No permission to bind to"
2601
" interface %s", self.interface)
2602
elif error.errno == errno.ENOPROTOOPT:
2603
logger.error("SO_BINDTODEVICE not available;"
2604
" cannot bind to interface %s",
2605
self.interface)
2606
elif error.errno == errno.ENODEV:
2607
logger.error("Interface %s does not exist,"
2608
" cannot bind", self.interface)
2609
else:
2610
raise
1771
2611
# Only bind(2) the socket if we really need to.
1772
2612
if self.server_address[0] or self.server_address[1]:
2613
if self.server_address[1]:
2614
self.allow_reuse_address = True
1773
2615
if not self.server_address[0]:
1774
2616
if self.address_family == socket.AF_INET6:
1775
any_address = "::" # in6addr_any
2617
any_address = "::" # in6addr_any
1776
2618
else:
1777
any_address = socket.INADDR_ANY
2619
any_address = "0.0.0.0" # INADDR_ANY
1778
2620
self.server_address = (any_address,
1779
2621
self.server_address[1])
1780
2622
elif not self.server_address[1]:
1781
self.server_address = (self.server_address[0],
1782
0)
2623
self.server_address = (self.server_address[0], 0)
1783
2624
# if self.interface:
1784
2625
# self.server_address = (self.server_address[0],
1785
2626
# 0, # port
1791
2632
1792
2633
class MandosServer(IPv6_TCPServer):
1793
2634
"""Mandos server.
1794
2635
1795
2636
Attributes:
1796
2637
clients: set of Client objects
1797
2638
gnutls_priority GnuTLS priority string
1798
2639
use_dbus: Boolean; to emit D-Bus signals or not
1799
1800
Assumes a gobject.MainLoop event loop.
2640
2641
Assumes a GLib.MainLoop event loop.
1801
2642
"""
2643
1802
2644
def __init__(self, server_address, RequestHandlerClass,
1803
interface=None, use_ipv6=True, clients=None,
1804
gnutls_priority=None, use_dbus=True):
2645
interface=None,
2646
use_ipv6=True,
2647
clients=None,
2648
gnutls_priority=None,
2649
use_dbus=True,
2650
socketfd=None):
1805
2651
self.enabled = False
1806
2652
self.clients = clients
1807
2653
if self.clients is None:
1810
2656
self.gnutls_priority = gnutls_priority
1811
2657
IPv6_TCPServer.__init__(self, server_address,
1812
2658
RequestHandlerClass,
1813
interface = interface,
1814
use_ipv6 = use_ipv6)
2659
interface=interface,
2660
use_ipv6=use_ipv6,
2661
socketfd=socketfd)
2662
1815
2663
def server_activate(self):
1816
2664
if self.enabled:
1817
2665
return socketserver.TCPServer.server_activate(self)
1818
2666
1819
2667
def enable(self):
1820
2668
self.enabled = True
1821
2669
1822
2670
def add_pipe(self, parent_pipe, proc):
1823
2671
# Call "handle_ipc" for both data and EOF events
1824
gobject.io_add_watch(parent_pipe.fileno(),
1825
gobject.IO_IN | gobject.IO_HUP,
1826
functools.partial(self.handle_ipc,
1827
parent_pipe =
1828
parent_pipe,
1829
proc = proc))
1830
1831
def handle_ipc(self, source, condition, parent_pipe=None,
1832
proc = None, client_object=None):
1833
condition_names = {
1834
gobject.IO_IN: "IN", # There is data to read.
1835
gobject.IO_OUT: "OUT", # Data can be written (without
1836
# blocking).
1837
gobject.IO_PRI: "PRI", # There is urgent data to read.
1838
gobject.IO_ERR: "ERR", # Error condition.
1839
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1840
# broken, usually for pipes and
1841
# sockets).
1842
}
1843
conditions_string = ' | '.join(name
1844
for cond, name in
1845
condition_names.iteritems()
1846
if cond & condition)
2672
GLib.io_add_watch(
2673
parent_pipe.fileno(),
2674
GLib.IO_IN | GLib.IO_HUP,
2675
functools.partial(self.handle_ipc,
2676
parent_pipe=parent_pipe,
2677
proc=proc))
2678
2679
def handle_ipc(self, source, condition,
2680
parent_pipe=None,
2681
proc=None,
2682
client_object=None):
1847
2683
# error, or the other end of multiprocessing.Pipe has closed
1848
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2684
if condition & (GLib.IO_ERR | GLib.IO_HUP):
1849
2685
# Wait for other process to exit
1850
2686
proc.join()
1851
2687
return False
1852
2688
1853
2689
# Read a request from the child
1854
2690
request = parent_pipe.recv()
1855
2691
command = request[0]
1856
2692
1857
2693
if command == 'init':
1858
fpr = request[1]
1859
address = request[2]
1860
1861
for c in self.clients.itervalues():
1862
if c.fingerprint == fpr:
2694
key_id = request[1].decode("ascii")
2695
fpr = request[2].decode("ascii")
2696
address = request[3]
2697
2698
for c in self.clients.values():
2699
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2700
continue
2701
if key_id and c.key_id == key_id:
2702
client = c
2703
break
2704
if fpr and c.fingerprint == fpr:
1863
2705
client = c
1864
2706
break
1865
2707
else:
1866
logger.info("Client not found for fingerprint: %s, ad"
1867
"dress: %s", fpr, address)
2708
logger.info("Client not found for key ID: %s, address"
2709
": %s", key_id or fpr, address)
1868
2710
if self.use_dbus:
1869
2711
# Emit D-Bus signal
1870
mandos_dbus_service.ClientNotFound(fpr,
2712
mandos_dbus_service.ClientNotFound(key_id or fpr,
1871
2713
address[0])
1872
2714
parent_pipe.send(False)
1873
2715
return False
1874
1875
gobject.io_add_watch(parent_pipe.fileno(),
1876
gobject.IO_IN | gobject.IO_HUP,
1877
functools.partial(self.handle_ipc,
1878
parent_pipe =
1879
parent_pipe,
1880
proc = proc,
1881
client_object =
1882
client))
2716
2717
GLib.io_add_watch(
2718
parent_pipe.fileno(),
2719
GLib.IO_IN | GLib.IO_HUP,
2720
functools.partial(self.handle_ipc,
2721
parent_pipe=parent_pipe,
2722
proc=proc,
2723
client_object=client))
1883
2724
parent_pipe.send(True)
1884
2725
# remove the old hook in favor of the new above hook on
1885
2726
# same fileno
1888
2729
funcname = request[1]
1889
2730
args = request[2]
1890
2731
kwargs = request[3]
1891
2732
1892
2733
parent_pipe.send(('data', getattr(client_object,
1893
2734
funcname)(*args,
1894
**kwargs)))
1895
2735
**kwargs)))
2736
1896
2737
if command == 'getattr':
1897
2738
attrname = request[1]
1898
if callable(client_object.__getattribute__(attrname)):
1899
parent_pipe.send(('function',))
2739
if isinstance(client_object.__getattribute__(attrname),
2740
collections.Callable):
2741
parent_pipe.send(('function', ))
1900
2742
else:
1901
parent_pipe.send(('data', client_object
1902
.__getattribute__(attrname)))
1903
2743
parent_pipe.send((
2744
'data', client_object.__getattribute__(attrname)))
2745
1904
2746
if command == 'setattr':
1905
2747
attrname = request[1]
1906
2748
value = request[2]
1907
2749
setattr(client_object, attrname, value)
1908
2750
1909
2751
return True
1910
2752
1911
2753
2754
def rfc3339_duration_to_delta(duration):
2755
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2756
2757
>>> rfc3339_duration_to_delta("P7D")
2758
datetime.timedelta(7)
2759
>>> rfc3339_duration_to_delta("PT60S")
2760
datetime.timedelta(0, 60)
2761
>>> rfc3339_duration_to_delta("PT60M")
2762
datetime.timedelta(0, 3600)
2763
>>> rfc3339_duration_to_delta("PT24H")
2764
datetime.timedelta(1)
2765
>>> rfc3339_duration_to_delta("P1W")
2766
datetime.timedelta(7)
2767
>>> rfc3339_duration_to_delta("PT5M30S")
2768
datetime.timedelta(0, 330)
2769
>>> rfc3339_duration_to_delta("P1DT3M20S")
2770
datetime.timedelta(1, 200)
2771
"""
2772
2773
# Parsing an RFC 3339 duration with regular expressions is not
2774
# possible - there would have to be multiple places for the same
2775
# values, like seconds. The current code, while more esoteric, is
2776
# cleaner without depending on a parsing library. If Python had a
2777
# built-in library for parsing we would use it, but we'd like to
2778
# avoid excessive use of external libraries.
2779
2780
# New type for defining tokens, syntax, and semantics all-in-one
2781
Token = collections.namedtuple("Token", (
2782
"regexp", # To match token; if "value" is not None, must have
2783
# a "group" containing digits
2784
"value", # datetime.timedelta or None
2785
"followers")) # Tokens valid after this token
2786
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2787
# the "duration" ABNF definition in RFC 3339, Appendix A.
2788
token_end = Token(re.compile(r"$"), None, frozenset())
2789
token_second = Token(re.compile(r"(\d+)S"),
2790
datetime.timedelta(seconds=1),
2791
frozenset((token_end, )))
2792
token_minute = Token(re.compile(r"(\d+)M"),
2793
datetime.timedelta(minutes=1),
2794
frozenset((token_second, token_end)))
2795
token_hour = Token(re.compile(r"(\d+)H"),
2796
datetime.timedelta(hours=1),
2797
frozenset((token_minute, token_end)))
2798
token_time = Token(re.compile(r"T"),
2799
None,
2800
frozenset((token_hour, token_minute,
2801
token_second)))
2802
token_day = Token(re.compile(r"(\d+)D"),
2803
datetime.timedelta(days=1),
2804
frozenset((token_time, token_end)))
2805
token_month = Token(re.compile(r"(\d+)M"),
2806
datetime.timedelta(weeks=4),
2807
frozenset((token_day, token_end)))
2808
token_year = Token(re.compile(r"(\d+)Y"),
2809
datetime.timedelta(weeks=52),
2810
frozenset((token_month, token_end)))
2811
token_week = Token(re.compile(r"(\d+)W"),
2812
datetime.timedelta(weeks=1),
2813
frozenset((token_end, )))
2814
token_duration = Token(re.compile(r"P"), None,
2815
frozenset((token_year, token_month,
2816
token_day, token_time,
2817
token_week)))
2818
# Define starting values:
2819
# Value so far
2820
value = datetime.timedelta()
2821
found_token = None
2822
# Following valid tokens
2823
followers = frozenset((token_duration, ))
2824
# String left to parse
2825
s = duration
2826
# Loop until end token is found
2827
while found_token is not token_end:
2828
# Search for any currently valid tokens
2829
for token in followers:
2830
match = token.regexp.match(s)
2831
if match is not None:
2832
# Token found
2833
if token.value is not None:
2834
# Value found, parse digits
2835
factor = int(match.group(1), 10)
2836
# Add to value so far
2837
value += factor * token.value
2838
# Strip token from string
2839
s = token.regexp.sub("", s, 1)
2840
# Go to found token
2841
found_token = token
2842
# Set valid next tokens
2843
followers = found_token.followers
2844
break
2845
else:
2846
# No currently valid tokens were found
2847
raise ValueError("Invalid RFC 3339 duration: {!r}"
2848
.format(duration))
2849
# End token found
2850
return value
2851
2852
1912
2853
def string_to_delta(interval):
1913
2854
"""Parse a string and return a datetime.timedelta
1914
2855
1915
2856
>>> string_to_delta('7d')
1916
2857
datetime.timedelta(7)
1917
2858
>>> string_to_delta('60s')
1925
2866
>>> string_to_delta('5m 30s')
1926
2867
datetime.timedelta(0, 330)
1927
2868
"""
2869
2870
try:
2871
return rfc3339_duration_to_delta(interval)
2872
except ValueError:
2873
pass
2874
1928
2875
timevalue = datetime.timedelta(0)
1929
2876
for s in interval.split():
1930
2877
try:
1931
suffix = unicode(s[-1])
2878
suffix = s[-1]
1932
2879
value = int(s[:-1])
1933
2880
if suffix == "d":
1934
2881
delta = datetime.timedelta(value)
1941
2888
elif suffix == "w":
1942
2889
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1943
2890
else:
1944
raise ValueError("Unknown suffix %r" % suffix)
1945
except (ValueError, IndexError) as e:
2891
raise ValueError("Unknown suffix {!r}".format(suffix))
2892
except IndexError as e:
1946
2893
raise ValueError(*(e.args))
1947
2894
timevalue += delta
1948
2895
return timevalue
1949
2896
1950
2897
1951
def daemon(nochdir = False, noclose = False):
2898
def daemon(nochdir=False, noclose=False):
1952
2899
"""See daemon(3). Standard BSD Unix function.
1953
2900
1954
2901
This should really exist as os.daemon, but it doesn't (yet)."""
1955
2902
if os.fork():
1956
2903
sys.exit()
1961
2908
sys.exit()
1962
2909
if not noclose:
1963
2910
# Close all standard open file descriptors
1964
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2911
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1965
2912
if not stat.S_ISCHR(os.fstat(null).st_mode):
1966
2913
raise OSError(errno.ENODEV,
1967
"%s not a character device"
1968
% os.path.devnull)
2914
"{} not a character device"
2915
.format(os.devnull))
1969
2916
os.dup2(null, sys.stdin.fileno())
1970
2917
os.dup2(null, sys.stdout.fileno())
1971
2918
os.dup2(null, sys.stderr.fileno())
1974
2921
1975
2922
1976
2923
def main():
1977
2924
1978
2925
##################################################################
1979
2926
# Parsing of options, both command line and config file
1980
2927
1981
2928
parser = argparse.ArgumentParser()
1982
2929
parser.add_argument("-v", "--version", action="version",
1983
version = "%%(prog)s %s" % version,
2930
version="%(prog)s {}".format(version),
1984
2931
help="show version number and exit")
1985
2932
parser.add_argument("-i", "--interface", metavar="IF",
1986
2933
help="Bind to interface IF")
1992
2939
help="Run self-test")
1993
2940
parser.add_argument("--debug", action="store_true",
1994
2941
help="Debug mode; run in foreground and log"
1995
" to terminal")
2942
" to terminal", default=None)
1996
2943
parser.add_argument("--debuglevel", metavar="LEVEL",
1997
2944
help="Debug level for stdout output")
1998
2945
parser.add_argument("--priority", help="GnuTLS"
2005
2952
" files")
2006
2953
parser.add_argument("--no-dbus", action="store_false",
2007
2954
dest="use_dbus", help="Do not provide D-Bus"
2008
" system bus interface")
2955
" system bus interface", default=None)
2009
2956
parser.add_argument("--no-ipv6", action="store_false",
2010
dest="use_ipv6", help="Do not use IPv6")
2957
dest="use_ipv6", help="Do not use IPv6",
2958
default=None)
2011
2959
parser.add_argument("--no-restore", action="store_false",
2012
2960
dest="restore", help="Do not restore stored"
2013
" state")
2961
" state", default=None)
2962
parser.add_argument("--socket", type=int,
2963
help="Specify a file descriptor to a network"
2964
" socket to use instead of creating one")
2014
2965
parser.add_argument("--statedir", metavar="DIR",
2015
2966
help="Directory to save/restore state in")
2016
2967
parser.add_argument("--foreground", action="store_true",
2968
help="Run in foreground", default=None)
2969
parser.add_argument("--no-zeroconf", action="store_false",
2970
dest="zeroconf", help="Do not use Zeroconf",
2971
default=None)
2972
2017
2973
options = parser.parse_args()
2018
2974
2019
2975
if options.check:
2020
2976
import doctest
2021
doctest.testmod()
2022
sys.exit()
2023
2977
fail_count, test_count = doctest.testmod()
2978
sys.exit(os.EX_OK if fail_count == 0 else 1)
2979
2024
2980
# Default values for config file for server-global settings
2025
server_defaults = { "interface": "",
2026
"address": "",
2027
"port": "",
2028
"debug": "False",
2029
"priority":
2030
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2031
"servicename": "Mandos",
2032
"use_dbus": "True",
2033
"use_ipv6": "True",
2034
"debuglevel": "",
2035
"restore": "True",
2036
"statedir": "/var/lib/mandos"
2037
}
2038
2981
if gnutls.has_rawpk:
2982
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2983
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2984
else:
2985
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2986
":+SIGN-DSA-SHA256")
2987
server_defaults = {"interface": "",
2988
"address": "",
2989
"port": "",
2990
"debug": "False",
2991
"priority": priority,
2992
"servicename": "Mandos",
2993
"use_dbus": "True",
2994
"use_ipv6": "True",
2995
"debuglevel": "",
2996
"restore": "True",
2997
"socket": "",
2998
"statedir": "/var/lib/mandos",
2999
"foreground": "False",
3000
"zeroconf": "True",
3001
}
3002
del priority
3003
2039
3004
# Parse config file for server-global settings
2040
server_config = configparser.SafeConfigParser(server_defaults)
3005
server_config = configparser.ConfigParser(server_defaults)
2041
3006
del server_defaults
2042
server_config.read(os.path.join(options.configdir,
2043
"mandos.conf"))
2044
# Convert the SafeConfigParser object to a dict
3007
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3008
# Convert the ConfigParser object to a dict
2045
3009
server_settings = server_config.defaults()
2046
3010
# Use the appropriate methods on the non-string config options
2047
for option in ("debug", "use_dbus", "use_ipv6"):
3011
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3012
"foreground", "zeroconf"):
2048
3013
server_settings[option] = server_config.getboolean("DEFAULT",
2049
3014
option)
2050
3015
if server_settings["port"]:
2051
3016
server_settings["port"] = server_config.getint("DEFAULT",
2052
3017
"port")
3018
if server_settings["socket"]:
3019
server_settings["socket"] = server_config.getint("DEFAULT",
3020
"socket")
3021
# Later, stdin will, and stdout and stderr might, be dup'ed
3022
# over with an opened os.devnull. But we don't want this to
3023
# happen with a supplied network socket.
3024
if 0 <= server_settings["socket"] <= 2:
3025
server_settings["socket"] = os.dup(server_settings
3026
["socket"])
2053
3027
del server_config
2054
3028
2055
3029
# Override the settings from the config file with command line
2056
3030
# options, if set.
2057
3031
for option in ("interface", "address", "port", "debug",
2058
"priority", "servicename", "configdir",
2059
"use_dbus", "use_ipv6", "debuglevel", "restore",
2060
"statedir"):
3032
"priority", "servicename", "configdir", "use_dbus",
3033
"use_ipv6", "debuglevel", "restore", "statedir",
3034
"socket", "foreground", "zeroconf"):
2061
3035
value = getattr(options, option)
2062
3036
if value is not None:
2063
3037
server_settings[option] = value
2064
3038
del options
2065
3039
# Force all strings to be unicode
2066
3040
for option in server_settings.keys():
2067
if type(server_settings[option]) is str:
2068
server_settings[option] = unicode(server_settings[option])
3041
if isinstance(server_settings[option], bytes):
3042
server_settings[option] = (server_settings[option]
3043
.decode("utf-8"))
3044
# Force all boolean options to be boolean
3045
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3046
"foreground", "zeroconf"):
3047
server_settings[option] = bool(server_settings[option])
3048
# Debug implies foreground
3049
if server_settings["debug"]:
3050
server_settings["foreground"] = True
2069
3051
# Now we have our good server settings in "server_settings"
2070
3052
2071
3053
##################################################################
2072
3054
3055
if (not server_settings["zeroconf"]
3056
and not (server_settings["port"]
3057
or server_settings["socket"] != "")):
3058
parser.error("Needs port or socket to work without Zeroconf")
3059
2073
3060
# For convenience
2074
3061
debug = server_settings["debug"]
2075
3062
debuglevel = server_settings["debuglevel"]
2077
3064
use_ipv6 = server_settings["use_ipv6"]
2078
3065
stored_state_path = os.path.join(server_settings["statedir"],
2079
3066
stored_state_file)
2080
3067
foreground = server_settings["foreground"]
3068
zeroconf = server_settings["zeroconf"]
3069
2081
3070
if debug:
2082
3071
initlogger(debug, logging.DEBUG)
2083
3072
else:
2086
3075
else:
2087
3076
level = getattr(logging, debuglevel.upper())
2088
3077
initlogger(debug, level)
2089
3078
2090
3079
if server_settings["servicename"] != "Mandos":
2091
syslogger.setFormatter(logging.Formatter
2092
('Mandos (%s) [%%(process)d]:'
2093
' %%(levelname)s: %%(message)s'
2094
% server_settings["servicename"]))
2095
3080
syslogger.setFormatter(
3081
logging.Formatter('Mandos ({}) [%(process)d]:'
3082
' %(levelname)s: %(message)s'.format(
3083
server_settings["servicename"])))
3084
2096
3085
# Parse config file with clients
2097
client_config = configparser.SafeConfigParser(Client.client_defaults)
3086
client_config = configparser.ConfigParser(Client.client_defaults)
2098
3087
client_config.read(os.path.join(server_settings["configdir"],
2099
3088
"clients.conf"))
2100
3089
2101
3090
global mandos_dbus_service
2102
3091
mandos_dbus_service = None
2103
2104
tcp_server = MandosServer((server_settings["address"],
2105
server_settings["port"]),
2106
ClientHandler,
2107
interface=(server_settings["interface"]
2108
or None),
2109
use_ipv6=use_ipv6,
2110
gnutls_priority=
2111
server_settings["priority"],
2112
use_dbus=use_dbus)
2113
if not debug:
2114
pidfilename = "/var/run/mandos.pid"
2115
try:
2116
pidfile = open(pidfilename, "w")
2117
except IOError:
2118
logger.error("Could not open file %r", pidfilename)
2119
2120
try:
2121
uid = pwd.getpwnam("_mandos").pw_uid
2122
gid = pwd.getpwnam("_mandos").pw_gid
2123
except KeyError:
2124
try:
2125
uid = pwd.getpwnam("mandos").pw_uid
2126
gid = pwd.getpwnam("mandos").pw_gid
3092
3093
socketfd = None
3094
if server_settings["socket"] != "":
3095
socketfd = server_settings["socket"]
3096
tcp_server = MandosServer(
3097
(server_settings["address"], server_settings["port"]),
3098
ClientHandler,
3099
interface=(server_settings["interface"] or None),
3100
use_ipv6=use_ipv6,
3101
gnutls_priority=server_settings["priority"],
3102
use_dbus=use_dbus,
3103
socketfd=socketfd)
3104
if not foreground:
3105
pidfilename = "/run/mandos.pid"
3106
if not os.path.isdir("/run/."):
3107
pidfilename = "/var/run/mandos.pid"
3108
pidfile = None
3109
try:
3110
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3111
except IOError as e:
3112
logger.error("Could not open file %r", pidfilename,
3113
exc_info=e)
3114
3115
for name, group in (("_mandos", "_mandos"),
3116
("mandos", "mandos"),
3117
("nobody", "nogroup")):
3118
try:
3119
uid = pwd.getpwnam(name).pw_uid
3120
gid = pwd.getpwnam(group).pw_gid
3121
break
2127
3122
except KeyError:
2128
try:
2129
uid = pwd.getpwnam("nobody").pw_uid
2130
gid = pwd.getpwnam("nobody").pw_gid
2131
except KeyError:
2132
uid = 65534
2133
gid = 65534
3123
continue
3124
else:
3125
uid = 65534
3126
gid = 65534
2134
3127
try:
2135
3128
os.setgid(gid)
2136
3129
os.setuid(uid)
3130
if debug:
3131
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3132
gid))
2137
3133
except OSError as error:
2138
if error[0] != errno.EPERM:
2139
raise error
2140
3134
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3135
.format(uid, gid, os.strerror(error.errno)))
3136
if error.errno != errno.EPERM:
3137
raise
3138
2141
3139
if debug:
2142
3140
# Enable all possible GnuTLS debugging
2143
3141
2144
3142
# "Use a log level over 10 to enable all debugging options."
2145
3143
# - GnuTLS manual
2146
gnutls.library.functions.gnutls_global_set_log_level(11)
2147
2148
@gnutls.library.types.gnutls_log_func
3144
gnutls.global_set_log_level(11)
3145
3146
@gnutls.log_func
2149
3147
def debug_gnutls(level, string):
2150
3148
logger.debug("GnuTLS: %s", string[:-1])
2151
2152
(gnutls.library.functions
2153
.gnutls_global_set_log_function(debug_gnutls))
2154
3149
3150
gnutls.global_set_log_function(debug_gnutls)
3151
2155
3152
# Redirect stdin so all checkers get /dev/null
2156
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3153
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2157
3154
os.dup2(null, sys.stdin.fileno())
2158
3155
if null > 2:
2159
3156
os.close(null)
2160
3157
2161
3158
# Need to fork before connecting to D-Bus
2162
if not debug:
3159
if not foreground:
2163
3160
# Close all input and output, do double fork, etc.
2164
3161
daemon()
2165
2166
gobject.threads_init()
2167
3162
3163
if gi.version_info < (3, 10, 2):
3164
# multiprocessing will use threads, so before we use GLib we
3165
# need to inform GLib that threads will be used.
3166
GLib.threads_init()
3167
2168
3168
global main_loop
2169
3169
# From the Avahi example code
2170
DBusGMainLoop(set_as_default=True )
2171
main_loop = gobject.MainLoop()
3170
DBusGMainLoop(set_as_default=True)
3171
main_loop = GLib.MainLoop()
2172
3172
bus = dbus.SystemBus()
2173
3173
# End of Avahi example code
2174
3174
if use_dbus:
2175
3175
try:
2176
3176
bus_name = dbus.service.BusName("se.recompile.Mandos",
2177
bus, do_not_queue=True)
2178
old_bus_name = (dbus.service.BusName
2179
("se.bsnet.fukt.Mandos", bus,
2180
do_not_queue=True))
2181
except dbus.exceptions.NameExistsException as e:
2182
logger.error(unicode(e) + ", disabling D-Bus")
3177
bus,
3178
do_not_queue=True)
3179
old_bus_name = dbus.service.BusName(
3180
"se.bsnet.fukt.Mandos", bus,
3181
do_not_queue=True)
3182
except dbus.exceptions.DBusException as e:
3183
logger.error("Disabling D-Bus:", exc_info=e)
2183
3184
use_dbus = False
2184
3185
server_settings["use_dbus"] = False
2185
3186
tcp_server.use_dbus = False
2186
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2187
service = AvahiServiceToSyslog(name =
2188
server_settings["servicename"],
2189
servicetype = "_mandos._tcp",
2190
protocol = protocol, bus = bus)
2191
if server_settings["interface"]:
2192
service.interface = (if_nametoindex
2193
(str(server_settings["interface"])))
2194
3187
if zeroconf:
3188
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3189
service = AvahiServiceToSyslog(
3190
name=server_settings["servicename"],
3191
servicetype="_mandos._tcp",
3192
protocol=protocol,
3193
bus=bus)
3194
if server_settings["interface"]:
3195
service.interface = if_nametoindex(
3196
server_settings["interface"].encode("utf-8"))
3197
2195
3198
global multiprocessing_manager
2196
3199
multiprocessing_manager = multiprocessing.Manager()
2197
3200
2198
3201
client_class = Client
2199
3202
if use_dbus:
2200
client_class = functools.partial(ClientDBusTransitional,
2201
bus = bus)
2202
3203
client_class = functools.partial(ClientDBus, bus=bus)
3204
2203
3205
client_settings = Client.config_parser(client_config)
2204
3206
old_client_settings = {}
2205
3207
clients_data = {}
2206
3208
3209
# This is used to redirect stdout and stderr for checker processes
3210
global wnull
3211
wnull = open(os.devnull, "w") # A writable /dev/null
3212
# Only used if server is running in foreground but not in debug
3213
# mode
3214
if debug or not foreground:
3215
wnull.close()
3216
2207
3217
# Get client data and settings from last running state.
2208
3218
if server_settings["restore"]:
2209
3219
try:
2210
3220
with open(stored_state_path, "rb") as stored_state:
2211
clients_data, old_client_settings = (pickle.load
2212
(stored_state))
3221
if sys.version_info.major == 2:
3222
clients_data, old_client_settings = pickle.load(
3223
stored_state)
3224
else:
3225
bytes_clients_data, bytes_old_client_settings = (
3226
pickle.load(stored_state, encoding="bytes"))
3227
# Fix bytes to strings
3228
# clients_data
3229
# .keys()
3230
clients_data = {(key.decode("utf-8")
3231
if isinstance(key, bytes)
3232
else key): value
3233
for key, value in
3234
bytes_clients_data.items()}
3235
del bytes_clients_data
3236
for key in clients_data:
3237
value = {(k.decode("utf-8")
3238
if isinstance(k, bytes) else k): v
3239
for k, v in
3240
clients_data[key].items()}
3241
clients_data[key] = value
3242
# .client_structure
3243
value["client_structure"] = [
3244
(s.decode("utf-8")
3245
if isinstance(s, bytes)
3246
else s) for s in
3247
value["client_structure"]]
3248
# .name & .host
3249
for k in ("name", "host"):
3250
if isinstance(value[k], bytes):
3251
value[k] = value[k].decode("utf-8")
3252
if "key_id" not in value:
3253
value["key_id"] = ""
3254
elif "fingerprint" not in value:
3255
value["fingerprint"] = ""
3256
# old_client_settings
3257
# .keys()
3258
old_client_settings = {
3259
(key.decode("utf-8")
3260
if isinstance(key, bytes)
3261
else key): value
3262
for key, value in
3263
bytes_old_client_settings.items()}
3264
del bytes_old_client_settings
3265
# .host
3266
for value in old_client_settings.values():
3267
if isinstance(value["host"], bytes):
3268
value["host"] = (value["host"]
3269
.decode("utf-8"))
2213
3270
os.remove(stored_state_path)
2214
3271
except IOError as e:
2215
logger.warning("Could not load persistent state: {0}"
2216
.format(e))
2217
if e.errno != errno.ENOENT:
3272
if e.errno == errno.ENOENT:
3273
logger.warning("Could not load persistent state:"
3274
" {}".format(os.strerror(e.errno)))
3275
else:
3276
logger.critical("Could not load persistent state:",
3277
exc_info=e)
2218
3278
raise
2219
3279
except EOFError as e:
2220
3280
logger.warning("Could not load persistent state: "
2221
"EOFError: {0}".format(e))
2222
3281
"EOFError:",
3282
exc_info=e)
3283
2223
3284
with PGPEngine() as pgp:
2224
for client_name, client in clients_data.iteritems():
3285
for client_name, client in clients_data.items():
3286
# Skip removed clients
3287
if client_name not in client_settings:
3288
continue
3289
2225
3290
# Decide which value to use after restoring saved state.
2226
3291
# We have three different values: Old config file,
2227
3292
# new config file, and saved state.
2232
3297
# For each value in new config, check if it
2233
3298
# differs from the old config value (Except for
2234
3299
# the "secret" attribute)
2235
if (name != "secret" and
2236
value != old_client_settings[client_name]
2237
[name]):
3300
if (name != "secret"
3301
and (value !=
3302
old_client_settings[client_name][name])):
2238
3303
client[name] = value
2239
3304
except KeyError:
2240
3305
pass
2241
3306
2242
3307
# Clients who has passed its expire date can still be
2243
# enabled if its last checker was successful. Clients
2244
# whose checker failed before we stored its state is
2245
# assumed to have failed all checkers during downtime.
3308
# enabled if its last checker was successful. A Client
3309
# whose checker succeeded before we stored its state is
3310
# assumed to have successfully run all checkers during
3311
# downtime.
2246
3312
if client["enabled"]:
2247
3313
if datetime.datetime.utcnow() >= client["expires"]:
2248
3314
if not client["last_checked_ok"]:
2249
3315
logger.warning(
2250
"disabling client {0} - Client never "
2251
"performed a successfull checker"
2252
.format(client["name"]))
3316
"disabling client {} - Client never "
3317
"performed a successful checker".format(
3318
client_name))
2253
3319
client["enabled"] = False
2254
3320
elif client["last_checker_status"] != 0:
2255
3321
logger.warning(
2256
"disabling client {0} - Client "
2257
"last checker failed with error code {1}"
2258
.format(client["name"],
2259
client["last_checker_status"]))
3322
"disabling client {} - Client last"
3323
" checker failed with error code"
3324
" {}".format(
3325
client_name,
3326
client["last_checker_status"]))
2260
3327
client["enabled"] = False
2261
3328
else:
2262
client["expires"] = (datetime.datetime
2263
.utcnow()
2264
+ client["timeout"])
2265
3329
client["expires"] = (
3330
datetime.datetime.utcnow()
3331
+ client["timeout"])
3332
logger.debug("Last checker succeeded,"
3333
" keeping {} enabled".format(
3334
client_name))
2266
3335
try:
2267
client["secret"] = (
2268
pgp.decrypt(client["encrypted_secret"],
2269
client_settings[client_name]
2270
["secret"]))
3336
client["secret"] = pgp.decrypt(
3337
client["encrypted_secret"],
3338
client_settings[client_name]["secret"])
2271
3339
except PGPError:
2272
3340
# If decryption fails, we use secret from new settings
2273
logger.debug("Failed to decrypt {0} old secret"
2274
.format(client_name))
2275
client["secret"] = (
2276
client_settings[client_name]["secret"])
3341
logger.debug("Failed to decrypt {} old secret".format(
3342
client_name))
3343
client["secret"] = (client_settings[client_name]
3344
["secret"])
2277
3345
2278
2279
3346
# Add/remove clients based on new changes made to config
2280
for client_name in set(old_client_settings) - set(client_settings):
3347
for client_name in (set(old_client_settings)
3348
- set(client_settings)):
2281
3349
del clients_data[client_name]
2282
for client_name in set(client_settings) - set(old_client_settings):
3350
for client_name in (set(client_settings)
3351
- set(old_client_settings)):
2283
3352
clients_data[client_name] = client_settings[client_name]
2284
3353
2285
# Create clients all clients
2286
for client_name, client in clients_data.iteritems():
3354
# Create all client objects
3355
for client_name, client in clients_data.items():
2287
3356
tcp_server.clients[client_name] = client_class(
2288
name = client_name, settings = client)
2289
3357
name=client_name,
3358
settings=client,
3359
server_settings=server_settings)
3360
2290
3361
if not tcp_server.clients:
2291
3362
logger.warning("No clients defined")
2292
2293
if not debug:
2294
try:
2295
with pidfile:
2296
pid = os.getpid()
2297
pidfile.write(str(pid) + "\n".encode("utf-8"))
2298
del pidfile
2299
except IOError:
2300
logger.error("Could not write to file %r with PID %d",
2301
pidfilename, pid)
2302
except NameError:
2303
# "pidfile" was never created
2304
pass
3363
3364
if not foreground:
3365
if pidfile is not None:
3366
pid = os.getpid()
3367
try:
3368
with pidfile:
3369
print(pid, file=pidfile)
3370
except IOError:
3371
logger.error("Could not write to file %r with PID %d",
3372
pidfilename, pid)
3373
del pidfile
2305
3374
del pidfilename
2306
signal.signal(signal.SIGINT, signal.SIG_IGN)
2307
2308
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2309
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2310
3375
3376
for termsig in (signal.SIGHUP, signal.SIGTERM):
3377
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3378
lambda: main_loop.quit() and False)
3379
2311
3380
if use_dbus:
2312
class MandosDBusService(dbus.service.Object):
3381
3382
@alternate_dbus_interfaces(
3383
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3384
class MandosDBusService(DBusObjectWithObjectManager):
2313
3385
"""A D-Bus proxy object"""
3386
2314
3387
def __init__(self):
2315
3388
dbus.service.Object.__init__(self, bus, "/")
3389
2316
3390
_interface = "se.recompile.Mandos"
2317
3391
2318
3392
@dbus.service.signal(_interface, signature="o")
2319
3393
def ClientAdded(self, objpath):
2320
3394
"D-Bus signal"
2321
3395
pass
2322
3396
2323
3397
@dbus.service.signal(_interface, signature="ss")
2324
def ClientNotFound(self, fingerprint, address):
3398
def ClientNotFound(self, key_id, address):
2325
3399
"D-Bus signal"
2326
3400
pass
2327
3401
3402
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3403
"true"})
2328
3404
@dbus.service.signal(_interface, signature="os")
2329
3405
def ClientRemoved(self, objpath, name):
2330
3406
"D-Bus signal"
2331
3407
pass
2332
3408
3409
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3410
"true"})
2333
3411
@dbus.service.method(_interface, out_signature="ao")
2334
3412
def GetAllClients(self):
2335
3413
"D-Bus method"
2336
return dbus.Array(c.dbus_object_path
2337
for c in
2338
tcp_server.clients.itervalues())
2339
3414
return dbus.Array(c.dbus_object_path for c in
3415
tcp_server.clients.values())
3416
3417
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3418
"true"})
2340
3419
@dbus.service.method(_interface,
2341
3420
out_signature="a{oa{sv}}")
2342
3421
def GetAllClientsWithProperties(self):
2343
3422
"D-Bus method"
2344
3423
return dbus.Dictionary(
2345
((c.dbus_object_path, c.GetAll(""))
2346
for c in tcp_server.clients.itervalues()),
3424
{c.dbus_object_path: c.GetAll(
3425
"se.recompile.Mandos.Client")
3426
for c in tcp_server.clients.values()},
2347
3427
signature="oa{sv}")
2348
3428
2349
3429
@dbus.service.method(_interface, in_signature="o")
2350
3430
def RemoveClient(self, object_path):
2351
3431
"D-Bus method"
2352
for c in tcp_server.clients.itervalues():
3432
for c in tcp_server.clients.values():
2353
3433
if c.dbus_object_path == object_path:
2354
3434
del tcp_server.clients[c.name]
2355
3435
c.remove_from_connection()
2356
# Don't signal anything except ClientRemoved
3436
# Don't signal the disabling
2357
3437
c.disable(quiet=True)
2358
# Emit D-Bus signal
2359
self.ClientRemoved(object_path, c.name)
3438
# Emit D-Bus signal for removal
3439
self.client_removed_signal(c)
2360
3440
return
2361
3441
raise KeyError(object_path)
2362
3442
2363
3443
del _interface
2364
2365
class MandosDBusServiceTransitional(MandosDBusService):
2366
__metaclass__ = AlternateDBusNamesMetaclass
2367
mandos_dbus_service = MandosDBusServiceTransitional()
2368
3444
3445
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3446
out_signature="a{oa{sa{sv}}}")
3447
def GetManagedObjects(self):
3448
"""D-Bus method"""
3449
return dbus.Dictionary(
3450
{client.dbus_object_path:
3451
dbus.Dictionary(
3452
{interface: client.GetAll(interface)
3453
for interface in
3454
client._get_all_interface_names()})
3455
for client in tcp_server.clients.values()})
3456
3457
def client_added_signal(self, client):
3458
"""Send the new standard signal and the old signal"""
3459
if use_dbus:
3460
# New standard signal
3461
self.InterfacesAdded(
3462
client.dbus_object_path,
3463
dbus.Dictionary(
3464
{interface: client.GetAll(interface)
3465
for interface in
3466
client._get_all_interface_names()}))
3467
# Old signal
3468
self.ClientAdded(client.dbus_object_path)
3469
3470
def client_removed_signal(self, client):
3471
"""Send the new standard signal and the old signal"""
3472
if use_dbus:
3473
# New standard signal
3474
self.InterfacesRemoved(
3475
client.dbus_object_path,
3476
client._get_all_interface_names())
3477
# Old signal
3478
self.ClientRemoved(client.dbus_object_path,
3479
client.name)
3480
3481
mandos_dbus_service = MandosDBusService()
3482
3483
# Save modules to variables to exempt the modules from being
3484
# unloaded before the function registered with atexit() is run.
3485
mp = multiprocessing
3486
wn = wnull
3487
2369
3488
def cleanup():
2370
3489
"Cleanup function; run on exit"
2371
service.cleanup()
2372
2373
multiprocessing.active_children()
3490
if zeroconf:
3491
service.cleanup()
3492
3493
mp.active_children()
3494
wn.close()
2374
3495
if not (tcp_server.clients or client_settings):
2375
3496
return
2376
3497
2377
3498
# Store client before exiting. Secrets are encrypted with key
2378
3499
# based on what config file has. If config file is
2379
3500
# removed/edited, old secret will thus be unrecovable.
2380
3501
clients = {}
2381
3502
with PGPEngine() as pgp:
2382
for client in tcp_server.clients.itervalues():
3503
for client in tcp_server.clients.values():
2383
3504
key = client_settings[client.name]["secret"]
2384
3505
client.encrypted_secret = pgp.encrypt(client.secret,
2385
3506
key)
2386
3507
client_dict = {}
2387
3508
2388
3509
# A list of attributes that can not be pickled
2389
3510
# + secret.
2390
exclude = set(("bus", "changedstate", "secret",
2391
"checker"))
2392
for name, typ in (inspect.getmembers
2393
(dbus.service.Object)):
3511
exclude = {"bus", "changedstate", "secret",
3512
"checker", "server_settings"}
3513
for name, typ in inspect.getmembers(dbus.service
3514
.Object):
2394
3515
exclude.add(name)
2395
3516
2396
3517
client_dict["encrypted_secret"] = (client
2397
3518
.encrypted_secret)
2398
3519
for attr in client.client_structure:
2399
3520
if attr not in exclude:
2400
3521
client_dict[attr] = getattr(client, attr)
2401
3522
2402
3523
clients[client.name] = client_dict
2403
3524
del client_settings[client.name]["secret"]
2404
3525
2405
3526
try:
2406
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2407
prefix="clients-",
2408
dir=os.path.dirname
2409
(stored_state_path))
2410
with os.fdopen(tempfd, "wb") as stored_state:
2411
pickle.dump((clients, client_settings), stored_state)
3527
with tempfile.NamedTemporaryFile(
3528
mode='wb',
3529
suffix=".pickle",
3530
prefix='clients-',
3531
dir=os.path.dirname(stored_state_path),
3532
delete=False) as stored_state:
3533
pickle.dump((clients, client_settings), stored_state,
3534
protocol=2)
3535
tempname = stored_state.name
2412
3536
os.rename(tempname, stored_state_path)
2413
3537
except (IOError, OSError) as e:
2414
logger.warning("Could not save persistent state: {0}"
2415
.format(e))
2416
3538
if not debug:
2417
3539
try:
2418
3540
os.remove(tempname)
2419
3541
except NameError:
2420
3542
pass
2421
if e.errno not in set((errno.ENOENT, errno.EACCES,
2422
errno.EEXIST)):
2423
raise e
2424
3543
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3544
logger.warning("Could not save persistent state: {}"
3545
.format(os.strerror(e.errno)))
3546
else:
3547
logger.warning("Could not save persistent state:",
3548
exc_info=e)
3549
raise
3550
2425
3551
# Delete all clients, and settings from config
2426
3552
while tcp_server.clients:
2427
3553
name, client = tcp_server.clients.popitem()
2428
3554
if use_dbus:
2429
3555
client.remove_from_connection()
2430
# Don't signal anything except ClientRemoved
3556
# Don't signal the disabling
2431
3557
client.disable(quiet=True)
3558
# Emit D-Bus signal for removal
2432
3559
if use_dbus:
2433
# Emit D-Bus signal
2434
mandos_dbus_service.ClientRemoved(client
2435
.dbus_object_path,
2436
client.name)
3560
mandos_dbus_service.client_removed_signal(client)
2437
3561
client_settings.clear()
2438
3562
2439
3563
atexit.register(cleanup)
2440
2441
for client in tcp_server.clients.itervalues():
3564
3565
for client in tcp_server.clients.values():
2442
3566
if use_dbus:
2443
# Emit D-Bus signal
2444
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3567
# Emit D-Bus signal for adding
3568
mandos_dbus_service.client_added_signal(client)
2445
3569
# Need to initiate checking of clients
2446
3570
if client.enabled:
2447
3571
client.init_checker()
2448
3572
2449
3573
tcp_server.enable()
2450
3574
tcp_server.server_activate()
2451
3575
2452
3576
# Find out what port we got
2453
service.port = tcp_server.socket.getsockname()[1]
3577
if zeroconf:
3578
service.port = tcp_server.socket.getsockname()[1]
2454
3579
if use_ipv6:
2455
3580
logger.info("Now listening on address %r, port %d,"
2456
" flowinfo %d, scope_id %d"
2457
% tcp_server.socket.getsockname())
3581
" flowinfo %d, scope_id %d",
3582
*tcp_server.socket.getsockname())
2458
3583
else: # IPv4
2459
logger.info("Now listening on address %r, port %d"
2460
% tcp_server.socket.getsockname())
2461
2462
#service.interface = tcp_server.socket.getsockname()[3]
2463
3584
logger.info("Now listening on address %r, port %d",
3585
*tcp_server.socket.getsockname())
3586
3587
# service.interface = tcp_server.socket.getsockname()[3]
3588
2464
3589
try:
2465
# From the Avahi example code
2466
try:
2467
service.activate()
2468
except dbus.exceptions.DBusException as error:
2469
logger.critical("DBusException: %s", error)
2470
cleanup()
2471
sys.exit(1)
2472
# End of Avahi example code
2473
2474
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2475
lambda *args, **kwargs:
2476
(tcp_server.handle_request
2477
(*args[2:], **kwargs) or True))
2478
3590
if zeroconf:
3591
# From the Avahi example code
3592
try:
3593
service.activate()
3594
except dbus.exceptions.DBusException as error:
3595
logger.critical("D-Bus Exception", exc_info=error)
3596
cleanup()
3597
sys.exit(1)
3598
# End of Avahi example code
3599
3600
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3601
lambda *args, **kwargs:
3602
(tcp_server.handle_request
3603
(*args[2:], **kwargs) or True))
3604
2479
3605
logger.debug("Starting main loop")
2480
3606
main_loop.run()
2481
3607
except AvahiError as error:
2482
logger.critical("AvahiError: %s", error)
3608
logger.critical("Avahi Error", exc_info=error)
2483
3609
cleanup()
2484
3610
sys.exit(1)
2485
3611
except KeyboardInterrupt:
2490
3616
# Must run before the D-Bus bus name gets deregistered
2491
3617
cleanup()
2492
3618
3619
2493
3620
if __name__ == '__main__':
2494
3621
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0