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- Committer: Teddy Hogeborn
- Date: 2019-04-09 19:41:53 UTC
- mfrom: (237.7.647 trunk)
- Revision ID: teddy@recompile.se-20190409194153-khftfvj3ee27md1a
Merge from trunk
- files added:
- bugs.xml
- debian/upstream
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
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2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
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# Mandos server - give out binary blobs to connecting clients.
5
#
5
#
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6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
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# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
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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
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# Contact the authors at <mandos@recompile.se>.
32
#
33
#
33
34
34
35
from __future__ import (division, absolute_import, print_function,
35
36
unicode_literals)
36
37
37
import SocketServer as socketserver
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
38
47
import socket
39
48
import argparse
40
49
import datetime
41
50
import errno
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
49
55
import sys
50
56
import re
51
57
import os
60
66
import struct
61
67
import fcntl
62
68
import functools
63
import cPickle as pickle
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
64
73
import multiprocessing
65
74
import types
66
75
import binascii
67
76
import tempfile
77
import itertools
78
import collections
79
import codecs
68
80
69
81
import dbus
70
82
import dbus.service
71
import gobject
72
import avahi
83
from gi.repository import GLib
73
84
from dbus.mainloop.glib import DBusGMainLoop
74
85
import ctypes
75
86
import ctypes.util
76
87
import xml.dom.minidom
77
88
import inspect
78
import GnuPGInterface
79
89
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# Try to find the value of SO_BINDTODEVICE:
80
91
try:
92
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
93
# newer, and it is also the most natural place for it:
81
94
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
82
95
except AttributeError:
83
96
try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
84
99
from IN import SO_BINDTODEVICE
85
100
except ImportError:
86
SO_BINDTODEVICE = None
87
88
version = "1.4.1"
101
# In Python 2.7 it seems to have been removed entirely.
102
# Try running the C preprocessor:
103
try:
104
cc = subprocess.Popen(["cc", "--language=c", "-E",
105
"/dev/stdin"],
106
stdin=subprocess.PIPE,
107
stdout=subprocess.PIPE)
108
stdout = cc.communicate(
109
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
110
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
111
except (OSError, ValueError, IndexError):
112
# No value found
113
SO_BINDTODEVICE = None
114
115
if sys.version_info.major == 2:
116
str = unicode
117
118
version = "1.8.3"
89
119
stored_state_file = "clients.pickle"
90
120
91
121
logger = logging.getLogger()
92
syslogger = (logging.handlers.SysLogHandler
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
122
syslogger = None
95
123
96
124
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
125
if_nametoindex = ctypes.cdll.LoadLibrary(
126
ctypes.util.find_library("c")).if_nametoindex
100
127
except (OSError, AttributeError):
128
101
129
def if_nametoindex(interface):
102
130
"Get an interface index the hard way, i.e. using fcntl()"
103
131
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
132
with contextlib.closing(socket.socket()) as s:
105
133
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
134
struct.pack(b"16s16x", interface))
135
interface_index = struct.unpack("I", ifreq[16:20])[0]
110
136
return interface_index
111
137
112
138
139
def copy_function(func):
140
"""Make a copy of a function"""
141
if sys.version_info.major == 2:
142
return types.FunctionType(func.func_code,
143
func.func_globals,
144
func.func_name,
145
func.func_defaults,
146
func.func_closure)
147
else:
148
return types.FunctionType(func.__code__,
149
func.__globals__,
150
func.__name__,
151
func.__defaults__,
152
func.__closure__)
153
154
113
155
def initlogger(debug, level=logging.WARNING):
114
156
"""init logger and add loglevel"""
115
157
158
global syslogger
159
syslogger = (logging.handlers.SysLogHandler(
160
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
161
address="/dev/log"))
116
162
syslogger.setFormatter(logging.Formatter
117
163
('Mandos [%(process)d]: %(levelname)s:'
118
164
' %(message)s'))
119
165
logger.addHandler(syslogger)
120
166
121
167
if debug:
122
168
console = logging.StreamHandler()
123
169
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
135
181
136
182
class PGPEngine(object):
137
183
"""A simple class for OpenPGP symmetric encryption & decryption"""
184
138
185
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
140
186
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
141
self.gnupg = GnuPGInterface.GnuPG()
142
self.gnupg.options.meta_interactive = False
143
self.gnupg.options.homedir = self.tempdir
144
self.gnupg.options.extra_args.extend(['--force-mdc',
145
'--quiet'])
146
187
self.gpg = "gpg"
188
try:
189
output = subprocess.check_output(["gpgconf"])
190
for line in output.splitlines():
191
name, text, path = line.split(b":")
192
if name == "gpg":
193
self.gpg = path
194
break
195
except OSError as e:
196
if e.errno != errno.ENOENT:
197
raise
198
self.gnupgargs = ['--batch',
199
'--homedir', self.tempdir,
200
'--force-mdc',
201
'--quiet']
202
# Only GPG version 1 has the --no-use-agent option.
203
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
204
self.gnupgargs.append("--no-use-agent")
205
147
206
def __enter__(self):
148
207
return self
149
150
def __exit__ (self, exc_type, exc_value, traceback):
208
209
def __exit__(self, exc_type, exc_value, traceback):
151
210
self._cleanup()
152
211
return False
153
212
154
213
def __del__(self):
155
214
self._cleanup()
156
215
157
216
def _cleanup(self):
158
217
if self.tempdir is not None:
159
218
# Delete contents of tempdir
160
219
for root, dirs, files in os.walk(self.tempdir,
161
topdown = False):
220
topdown=False):
162
221
for filename in files:
163
222
os.remove(os.path.join(root, filename))
164
223
for dirname in dirs:
166
225
# Remove tempdir
167
226
os.rmdir(self.tempdir)
168
227
self.tempdir = None
169
228
170
229
def password_encode(self, password):
171
230
# Passphrase can not be empty and can not contain newlines or
172
231
# NUL bytes. So we prefix it and hex encode it.
173
return b"mandos" + binascii.hexlify(password)
174
232
encoded = b"mandos" + binascii.hexlify(password)
233
if len(encoded) > 2048:
234
# GnuPG can't handle long passwords, so encode differently
235
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
236
.replace(b"\n", b"\\n")
237
.replace(b"\0", b"\\x00"))
238
return encoded
239
175
240
def encrypt(self, data, password):
176
self.gnupg.passphrase = self.password_encode(password)
177
with open(os.devnull) as devnull:
178
try:
179
proc = self.gnupg.run(['--symmetric'],
180
create_fhs=['stdin', 'stdout'],
181
attach_fhs={'stderr': devnull})
182
with contextlib.closing(proc.handles['stdin']) as f:
183
f.write(data)
184
with contextlib.closing(proc.handles['stdout']) as f:
185
ciphertext = f.read()
186
proc.wait()
187
except IOError as e:
188
raise PGPError(e)
189
self.gnupg.passphrase = None
241
passphrase = self.password_encode(password)
242
with tempfile.NamedTemporaryFile(
243
dir=self.tempdir) as passfile:
244
passfile.write(passphrase)
245
passfile.flush()
246
proc = subprocess.Popen([self.gpg, '--symmetric',
247
'--passphrase-file',
248
passfile.name]
249
+ self.gnupgargs,
250
stdin=subprocess.PIPE,
251
stdout=subprocess.PIPE,
252
stderr=subprocess.PIPE)
253
ciphertext, err = proc.communicate(input=data)
254
if proc.returncode != 0:
255
raise PGPError(err)
190
256
return ciphertext
191
257
192
258
def decrypt(self, data, password):
193
self.gnupg.passphrase = self.password_encode(password)
194
with open(os.devnull) as devnull:
195
try:
196
proc = self.gnupg.run(['--decrypt'],
197
create_fhs=['stdin', 'stdout'],
198
attach_fhs={'stderr': devnull})
199
with contextlib.closing(proc.handles['stdin'] ) as f:
200
f.write(data)
201
with contextlib.closing(proc.handles['stdout']) as f:
202
decrypted_plaintext = f.read()
203
proc.wait()
204
except IOError as e:
205
raise PGPError(e)
206
self.gnupg.passphrase = None
259
passphrase = self.password_encode(password)
260
with tempfile.NamedTemporaryFile(
261
dir=self.tempdir) as passfile:
262
passfile.write(passphrase)
263
passfile.flush()
264
proc = subprocess.Popen([self.gpg, '--decrypt',
265
'--passphrase-file',
266
passfile.name]
267
+ self.gnupgargs,
268
stdin=subprocess.PIPE,
269
stdout=subprocess.PIPE,
270
stderr=subprocess.PIPE)
271
decrypted_plaintext, err = proc.communicate(input=data)
272
if proc.returncode != 0:
273
raise PGPError(err)
207
274
return decrypted_plaintext
208
275
209
276
277
# Pretend that we have an Avahi module
278
class avahi(object):
279
"""This isn't so much a class as it is a module-like namespace."""
280
IF_UNSPEC = -1 # avahi-common/address.h
281
PROTO_UNSPEC = -1 # avahi-common/address.h
282
PROTO_INET = 0 # avahi-common/address.h
283
PROTO_INET6 = 1 # avahi-common/address.h
284
DBUS_NAME = "org.freedesktop.Avahi"
285
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
286
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
287
DBUS_PATH_SERVER = "/"
288
289
@staticmethod
290
def string_array_to_txt_array(t):
291
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
for s in t), signature="ay")
293
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
294
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
295
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
296
SERVER_INVALID = 0 # avahi-common/defs.h
297
SERVER_REGISTERING = 1 # avahi-common/defs.h
298
SERVER_RUNNING = 2 # avahi-common/defs.h
299
SERVER_COLLISION = 3 # avahi-common/defs.h
300
SERVER_FAILURE = 4 # avahi-common/defs.h
301
210
302
211
303
class AvahiError(Exception):
212
304
def __init__(self, value, *args, **kwargs):
213
305
self.value = value
214
super(AvahiError, self).__init__(value, *args, **kwargs)
215
def __unicode__(self):
216
return unicode(repr(self.value))
306
return super(AvahiError, self).__init__(value, *args,
307
**kwargs)
308
217
309
218
310
class AvahiServiceError(AvahiError):
219
311
pass
220
312
313
221
314
class AvahiGroupError(AvahiError):
222
315
pass
223
316
224
317
225
318
class AvahiService(object):
226
319
"""An Avahi (Zeroconf) service.
227
320
228
321
Attributes:
229
322
interface: integer; avahi.IF_UNSPEC or an interface index.
230
323
Used to optionally bind to the specified interface.
231
324
name: string; Example: 'Mandos'
232
325
type: string; Example: '_mandos._tcp'.
233
See <http://www.dns-sd.org/ServiceTypes.html>
326
See <https://www.iana.org/assignments/service-names-port-numbers>
234
327
port: integer; what port to announce
235
328
TXT: list of strings; TXT record for the service
236
329
domain: string; Domain to publish on, default to .local if empty.
242
335
server: D-Bus Server
243
336
bus: dbus.SystemBus()
244
337
"""
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):
338
339
def __init__(self,
340
interface=avahi.IF_UNSPEC,
341
name=None,
342
servicetype=None,
343
port=None,
344
TXT=None,
345
domain="",
346
host="",
347
max_renames=32768,
348
protocol=avahi.PROTO_UNSPEC,
349
bus=None):
249
350
self.interface = interface
250
351
self.name = name
251
352
self.type = servicetype
260
361
self.server = None
261
362
self.bus = bus
262
363
self.entry_group_state_changed_match = None
263
def rename(self):
364
365
def rename(self, remove=True):
264
366
"""Derived from the Avahi example code"""
265
367
if self.rename_count >= self.max_renames:
266
368
logger.critical("No suitable Zeroconf service name found"
267
369
" after %i retries, exiting.",
268
370
self.rename_count)
269
371
raise AvahiServiceError("Too many renames")
270
self.name = unicode(self.server
271
.GetAlternativeServiceName(self.name))
372
self.name = str(
373
self.server.GetAlternativeServiceName(self.name))
374
self.rename_count += 1
272
375
logger.info("Changing Zeroconf service name to %r ...",
273
376
self.name)
274
self.remove()
377
if remove:
378
self.remove()
275
379
try:
276
380
self.add()
277
381
except dbus.exceptions.DBusException as error:
278
logger.critical("DBusException: %s", error)
279
self.cleanup()
280
os._exit(1)
281
self.rename_count += 1
382
if (error.get_dbus_name()
383
== "org.freedesktop.Avahi.CollisionError"):
384
logger.info("Local Zeroconf service name collision.")
385
return self.rename(remove=False)
386
else:
387
logger.critical("D-Bus Exception", exc_info=error)
388
self.cleanup()
389
os._exit(1)
390
282
391
def remove(self):
283
392
"""Derived from the Avahi example code"""
284
393
if self.entry_group_state_changed_match is not None:
286
395
self.entry_group_state_changed_match = None
287
396
if self.group is not None:
288
397
self.group.Reset()
398
289
399
def add(self):
290
400
"""Derived from the Avahi example code"""
291
401
self.remove()
308
418
dbus.UInt16(self.port),
309
419
avahi.string_array_to_txt_array(self.TXT))
310
420
self.group.Commit()
421
311
422
def entry_group_state_changed(self, state, error):
312
423
"""Derived from the Avahi example code"""
313
424
logger.debug("Avahi entry group state change: %i", state)
314
425
315
426
if state == avahi.ENTRY_GROUP_ESTABLISHED:
316
427
logger.debug("Zeroconf service established.")
317
428
elif state == avahi.ENTRY_GROUP_COLLISION:
319
430
self.rename()
320
431
elif state == avahi.ENTRY_GROUP_FAILURE:
321
432
logger.critical("Avahi: Error in group state changed %s",
322
unicode(error))
323
raise AvahiGroupError("State changed: %s"
324
% unicode(error))
433
str(error))
434
raise AvahiGroupError("State changed: {!s}".format(error))
435
325
436
def cleanup(self):
326
437
"""Derived from the Avahi example code"""
327
438
if self.group is not None:
332
443
pass
333
444
self.group = None
334
445
self.remove()
446
335
447
def server_state_changed(self, state, error=None):
336
448
"""Derived from the Avahi example code"""
337
449
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" }
450
bad_states = {
451
avahi.SERVER_INVALID: "Zeroconf server invalid",
452
avahi.SERVER_REGISTERING: None,
453
avahi.SERVER_COLLISION: "Zeroconf server name collision",
454
avahi.SERVER_FAILURE: "Zeroconf server failure",
455
}
345
456
if state in bad_states:
346
457
if bad_states[state] is not None:
347
458
if error is None:
350
461
logger.error(bad_states[state] + ": %r", error)
351
462
self.cleanup()
352
463
elif state == avahi.SERVER_RUNNING:
353
self.add()
464
try:
465
self.add()
466
except dbus.exceptions.DBusException as error:
467
if (error.get_dbus_name()
468
== "org.freedesktop.Avahi.CollisionError"):
469
logger.info("Local Zeroconf service name"
470
" collision.")
471
return self.rename(remove=False)
472
else:
473
logger.critical("D-Bus Exception", exc_info=error)
474
self.cleanup()
475
os._exit(1)
354
476
else:
355
477
if error is None:
356
478
logger.debug("Unknown state: %r", state)
357
479
else:
358
480
logger.debug("Unknown state: %r: %r", state, error)
481
359
482
def activate(self):
360
483
"""Derived from the Avahi example code"""
361
484
if self.server is None:
365
488
follow_name_owner_changes=True),
366
489
avahi.DBUS_INTERFACE_SERVER)
367
490
self.server.connect_to_signal("StateChanged",
368
self.server_state_changed)
491
self.server_state_changed)
369
492
self.server_state_changed(self.server.GetState())
370
493
494
371
495
class AvahiServiceToSyslog(AvahiService):
372
def rename(self):
496
def rename(self, *args, **kwargs):
373
497
"""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))
498
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
499
syslogger.setFormatter(logging.Formatter(
500
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
501
.format(self.name)))
379
502
return ret
380
503
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
504
505
# Pretend that we have a GnuTLS module
506
class gnutls(object):
507
"""This isn't so much a class as it is a module-like namespace."""
508
509
library = ctypes.util.find_library("gnutls")
510
if library is None:
511
library = ctypes.util.find_library("gnutls-deb0")
512
_library = ctypes.cdll.LoadLibrary(library)
513
del library
514
515
# Unless otherwise indicated, the constants and types below are
516
# all from the gnutls/gnutls.h C header file.
517
518
# Constants
519
E_SUCCESS = 0
520
E_INTERRUPTED = -52
521
E_AGAIN = -28
522
CRT_OPENPGP = 2
523
CRT_RAWPK = 3
524
CLIENT = 2
525
SHUT_RDWR = 0
526
CRD_CERTIFICATE = 1
527
E_NO_CERTIFICATE_FOUND = -49
528
X509_FMT_DER = 0
529
NO_TICKETS = 1<<10
530
ENABLE_RAWPK = 1<<18
531
CTYPE_PEERS = 3
532
KEYID_USE_SHA256 = 1 # gnutls/x509.h
533
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
534
535
# Types
536
class session_int(ctypes.Structure):
537
_fields_ = []
538
session_t = ctypes.POINTER(session_int)
539
540
class certificate_credentials_st(ctypes.Structure):
541
_fields_ = []
542
certificate_credentials_t = ctypes.POINTER(
543
certificate_credentials_st)
544
certificate_type_t = ctypes.c_int
545
546
class datum_t(ctypes.Structure):
547
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
548
('size', ctypes.c_uint)]
549
550
class openpgp_crt_int(ctypes.Structure):
551
_fields_ = []
552
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
553
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
554
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
555
credentials_type_t = ctypes.c_int
556
transport_ptr_t = ctypes.c_void_p
557
close_request_t = ctypes.c_int
558
559
# Exceptions
560
class Error(Exception):
561
def __init__(self, message=None, code=None, args=()):
562
# Default usage is by a message string, but if a return
563
# code is passed, convert it to a string with
564
# gnutls.strerror()
565
self.code = code
566
if message is None and code is not None:
567
message = gnutls.strerror(code)
568
return super(gnutls.Error, self).__init__(
569
message, *args)
570
571
class CertificateSecurityError(Error):
572
pass
573
574
# Classes
575
class Credentials(object):
576
def __init__(self):
577
self._c_object = gnutls.certificate_credentials_t()
578
gnutls.certificate_allocate_credentials(
579
ctypes.byref(self._c_object))
580
self.type = gnutls.CRD_CERTIFICATE
581
582
def __del__(self):
583
gnutls.certificate_free_credentials(self._c_object)
584
585
class ClientSession(object):
586
def __init__(self, socket, credentials=None):
587
self._c_object = gnutls.session_t()
588
gnutls_flags = gnutls.CLIENT
589
if gnutls.check_version("3.5.6"):
590
gnutls_flags |= gnutls.NO_TICKETS
591
if gnutls.has_rawpk:
592
gnutls_flags |= gnutls.ENABLE_RAWPK
593
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
594
del gnutls_flags
595
gnutls.set_default_priority(self._c_object)
596
gnutls.transport_set_ptr(self._c_object, socket.fileno())
597
gnutls.handshake_set_private_extensions(self._c_object,
598
True)
599
self.socket = socket
600
if credentials is None:
601
credentials = gnutls.Credentials()
602
gnutls.credentials_set(self._c_object, credentials.type,
603
ctypes.cast(credentials._c_object,
604
ctypes.c_void_p))
605
self.credentials = credentials
606
607
def __del__(self):
608
gnutls.deinit(self._c_object)
609
610
def handshake(self):
611
return gnutls.handshake(self._c_object)
612
613
def send(self, data):
614
data = bytes(data)
615
data_len = len(data)
616
while data_len > 0:
617
data_len -= gnutls.record_send(self._c_object,
618
data[-data_len:],
619
data_len)
620
621
def bye(self):
622
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
623
624
# Error handling functions
625
def _error_code(result):
626
"""A function to raise exceptions on errors, suitable
627
for the 'restype' attribute on ctypes functions"""
628
if result >= 0:
629
return result
630
if result == gnutls.E_NO_CERTIFICATE_FOUND:
631
raise gnutls.CertificateSecurityError(code=result)
632
raise gnutls.Error(code=result)
633
634
def _retry_on_error(result, func, arguments):
635
"""A function to retry on some errors, suitable
636
for the 'errcheck' attribute on ctypes functions"""
637
while result < 0:
638
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
639
return _error_code(result)
640
result = func(*arguments)
641
return result
642
643
# Unless otherwise indicated, the function declarations below are
644
# all from the gnutls/gnutls.h C header file.
645
646
# Functions
647
priority_set_direct = _library.gnutls_priority_set_direct
648
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
649
ctypes.POINTER(ctypes.c_char_p)]
650
priority_set_direct.restype = _error_code
651
652
init = _library.gnutls_init
653
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
654
init.restype = _error_code
655
656
set_default_priority = _library.gnutls_set_default_priority
657
set_default_priority.argtypes = [session_t]
658
set_default_priority.restype = _error_code
659
660
record_send = _library.gnutls_record_send
661
record_send.argtypes = [session_t, ctypes.c_void_p,
662
ctypes.c_size_t]
663
record_send.restype = ctypes.c_ssize_t
664
record_send.errcheck = _retry_on_error
665
666
certificate_allocate_credentials = (
667
_library.gnutls_certificate_allocate_credentials)
668
certificate_allocate_credentials.argtypes = [
669
ctypes.POINTER(certificate_credentials_t)]
670
certificate_allocate_credentials.restype = _error_code
671
672
certificate_free_credentials = (
673
_library.gnutls_certificate_free_credentials)
674
certificate_free_credentials.argtypes = [
675
certificate_credentials_t]
676
certificate_free_credentials.restype = None
677
678
handshake_set_private_extensions = (
679
_library.gnutls_handshake_set_private_extensions)
680
handshake_set_private_extensions.argtypes = [session_t,
681
ctypes.c_int]
682
handshake_set_private_extensions.restype = None
683
684
credentials_set = _library.gnutls_credentials_set
685
credentials_set.argtypes = [session_t, credentials_type_t,
686
ctypes.c_void_p]
687
credentials_set.restype = _error_code
688
689
strerror = _library.gnutls_strerror
690
strerror.argtypes = [ctypes.c_int]
691
strerror.restype = ctypes.c_char_p
692
693
certificate_type_get = _library.gnutls_certificate_type_get
694
certificate_type_get.argtypes = [session_t]
695
certificate_type_get.restype = _error_code
696
697
certificate_get_peers = _library.gnutls_certificate_get_peers
698
certificate_get_peers.argtypes = [session_t,
699
ctypes.POINTER(ctypes.c_uint)]
700
certificate_get_peers.restype = ctypes.POINTER(datum_t)
701
702
global_set_log_level = _library.gnutls_global_set_log_level
703
global_set_log_level.argtypes = [ctypes.c_int]
704
global_set_log_level.restype = None
705
706
global_set_log_function = _library.gnutls_global_set_log_function
707
global_set_log_function.argtypes = [log_func]
708
global_set_log_function.restype = None
709
710
deinit = _library.gnutls_deinit
711
deinit.argtypes = [session_t]
712
deinit.restype = None
713
714
handshake = _library.gnutls_handshake
715
handshake.argtypes = [session_t]
716
handshake.restype = _error_code
717
handshake.errcheck = _retry_on_error
718
719
transport_set_ptr = _library.gnutls_transport_set_ptr
720
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
721
transport_set_ptr.restype = None
722
723
bye = _library.gnutls_bye
724
bye.argtypes = [session_t, close_request_t]
725
bye.restype = _error_code
726
bye.errcheck = _retry_on_error
727
728
check_version = _library.gnutls_check_version
729
check_version.argtypes = [ctypes.c_char_p]
730
check_version.restype = ctypes.c_char_p
731
732
_need_version = b"3.3.0"
733
if check_version(_need_version) is None:
734
raise self.Error("Needs GnuTLS {} or later"
735
.format(_need_version))
736
737
_tls_rawpk_version = b"3.6.6"
738
has_rawpk = bool(check_version(_tls_rawpk_version))
739
740
if has_rawpk:
741
# Types
742
class pubkey_st(ctypes.Structure):
743
_fields = []
744
pubkey_t = ctypes.POINTER(pubkey_st)
745
746
x509_crt_fmt_t = ctypes.c_int
747
748
# All the function declarations below are from gnutls/abstract.h
749
pubkey_init = _library.gnutls_pubkey_init
750
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
751
pubkey_init.restype = _error_code
752
753
pubkey_import = _library.gnutls_pubkey_import
754
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
755
x509_crt_fmt_t]
756
pubkey_import.restype = _error_code
757
758
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
759
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
760
ctypes.POINTER(ctypes.c_ubyte),
761
ctypes.POINTER(ctypes.c_size_t)]
762
pubkey_get_key_id.restype = _error_code
763
764
pubkey_deinit = _library.gnutls_pubkey_deinit
765
pubkey_deinit.argtypes = [pubkey_t]
766
pubkey_deinit.restype = None
767
else:
768
# All the function declarations below are from gnutls/openpgp.h
769
770
openpgp_crt_init = _library.gnutls_openpgp_crt_init
771
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
772
openpgp_crt_init.restype = _error_code
773
774
openpgp_crt_import = _library.gnutls_openpgp_crt_import
775
openpgp_crt_import.argtypes = [openpgp_crt_t,
776
ctypes.POINTER(datum_t),
777
openpgp_crt_fmt_t]
778
openpgp_crt_import.restype = _error_code
779
780
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
781
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
782
ctypes.POINTER(ctypes.c_uint)]
783
openpgp_crt_verify_self.restype = _error_code
784
785
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
786
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
787
openpgp_crt_deinit.restype = None
788
789
openpgp_crt_get_fingerprint = (
790
_library.gnutls_openpgp_crt_get_fingerprint)
791
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
792
ctypes.c_void_p,
793
ctypes.POINTER(
794
ctypes.c_size_t)]
795
openpgp_crt_get_fingerprint.restype = _error_code
796
797
if check_version("3.6.4"):
798
certificate_type_get2 = _library.gnutls_certificate_type_get2
799
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
800
certificate_type_get2.restype = _error_code
801
802
# Remove non-public functions
803
del _error_code, _retry_on_error
804
805
806
def call_pipe(connection, # : multiprocessing.Connection
807
func, *args, **kwargs):
808
"""This function is meant to be called by multiprocessing.Process
809
810
This function runs func(*args, **kwargs), and writes the resulting
811
return value on the provided multiprocessing.Connection.
812
"""
813
connection.send(func(*args, **kwargs))
814
connection.close()
815
816
387
817
class Client(object):
388
818
"""A representation of a client host served by this server.
389
819
390
820
Attributes:
391
821
approved: bool(); 'None' if not yet approved/disapproved
392
822
approval_delay: datetime.timedelta(); Time to wait for approval
394
824
checker: subprocess.Popen(); a running checker process used
395
825
to see if the client lives.
396
826
'None' if no process is running.
397
checker_callback_tag: a gobject event source tag, or None
827
checker_callback_tag: a GLib event source tag, or None
398
828
checker_command: string; External command which is run to check
399
829
if client lives. %() expansions are done at
400
830
runtime with vars(self) as dict, so that for
401
831
instance %(name)s can be used in the command.
402
checker_initiator_tag: a gobject event source tag, or None
832
checker_initiator_tag: a GLib event source tag, or None
403
833
created: datetime.datetime(); (UTC) object creation
404
834
client_structure: Object describing what attributes a client has
405
835
and is used for storing the client at exit
406
836
current_checker_command: string; current running checker_command
407
disable_initiator_tag: a gobject event source tag, or None
837
disable_initiator_tag: a GLib event source tag, or None
408
838
enabled: bool()
409
839
fingerprint: string (40 or 32 hexadecimal digits); used to
410
uniquely identify the client
840
uniquely identify an OpenPGP client
841
key_id: string (64 hexadecimal digits); used to uniquely identify
842
a client using raw public keys
411
843
host: string; available for use by the checker command
412
844
interval: datetime.timedelta(); How often to start a new checker
413
845
last_approval_request: datetime.datetime(); (UTC) or None
414
846
last_checked_ok: datetime.datetime(); (UTC) or None
415
847
last_checker_status: integer between 0 and 255 reflecting exit
416
848
status of last checker. -1 reflects crashed
417
checker, or None.
849
checker, -2 means no checker completed yet.
850
last_checker_signal: The signal which killed the last checker, if
851
last_checker_status is -1
418
852
last_enabled: datetime.datetime(); (UTC) or None
419
853
name: string; from the config file, used in log messages and
420
854
D-Bus identifiers
421
855
secret: bytestring; sent verbatim (over TLS) to client
422
856
timeout: datetime.timedelta(); How long from last_checked_ok
423
857
until this client is disabled
424
extended_timeout: extra long timeout when password has been sent
858
extended_timeout: extra long timeout when secret has been sent
425
859
runtime_expansions: Allowed attributes for runtime expansion.
426
860
expires: datetime.datetime(); time (UTC) when a client will be
427
861
disabled, or None
862
server_settings: The server_settings dict from main()
428
863
"""
429
864
430
865
runtime_expansions = ("approval_delay", "approval_duration",
431
"created", "enabled", "fingerprint",
432
"host", "interval", "last_checked_ok",
866
"created", "enabled", "expires", "key_id",
867
"fingerprint", "host", "interval",
868
"last_approval_request", "last_checked_ok",
433
869
"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)
870
client_defaults = {
871
"timeout": "PT5M",
872
"extended_timeout": "PT15M",
873
"interval": "PT2M",
874
"checker": "fping -q -- %%(host)s",
875
"host": "",
876
"approval_delay": "PT0S",
877
"approval_duration": "PT1S",
878
"approved_by_default": "True",
879
"enabled": "True",
880
}
459
881
460
882
@staticmethod
461
883
def config_parser(config):
462
""" Construct a new dict of client settings of this form:
884
"""Construct a new dict of client settings of this form:
463
885
{ client_name: {setting_name: value, ...}, ...}
464
with exceptions for any special settings as defined above"""
886
with exceptions for any special settings as defined above.
887
NOTE: Must be a pure function. Must return the same result
888
value given the same arguments.
889
"""
465
890
settings = {}
466
891
for client_name in config.sections():
467
892
section = dict(config.items(client_name))
468
893
client = settings[client_name] = {}
469
894
470
895
client["host"] = section["host"]
471
896
# Reformat values from string types to Python types
472
897
client["approved_by_default"] = config.getboolean(
473
898
client_name, "approved_by_default")
474
client["enabled"] = config.getboolean(client_name, "enabled")
475
899
client["enabled"] = config.getboolean(client_name,
900
"enabled")
901
902
# Uppercase and remove spaces from key_id and fingerprint
903
# for later comparison purposes with return value from the
904
# key_id() and fingerprint() functions
905
client["key_id"] = (section.get("key_id", "").upper()
906
.replace(" ", ""))
476
907
client["fingerprint"] = (section["fingerprint"].upper()
477
908
.replace(" ", ""))
478
909
if "secret" in section:
479
client["secret"] = section["secret"].decode("base64")
910
client["secret"] = codecs.decode(section["secret"]
911
.encode("utf-8"),
912
"base64")
480
913
elif "secfile" in section:
481
914
with open(os.path.expanduser(os.path.expandvars
482
915
(section["secfile"])),
483
916
"rb") as secfile:
484
917
client["secret"] = secfile.read()
485
918
else:
486
raise TypeError("No secret or secfile for section %s"
487
% section)
919
raise TypeError("No secret or secfile for section {}"
920
.format(section))
488
921
client["timeout"] = string_to_delta(section["timeout"])
489
922
client["extended_timeout"] = string_to_delta(
490
923
section["extended_timeout"])
496
929
client["checker_command"] = section["checker"]
497
930
client["last_approval_request"] = None
498
931
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
932
client["last_checker_status"] = -2
507
933
508
934
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."""
935
936
def __init__(self, settings, name=None, server_settings=None):
515
937
self.name = name
938
if server_settings is None:
939
server_settings = {}
940
self.server_settings = server_settings
516
941
# adding all client settings
517
for setting, value in settings.iteritems():
942
for setting, value in settings.items():
518
943
setattr(self, setting, value)
519
944
945
if self.enabled:
946
if not hasattr(self, "last_enabled"):
947
self.last_enabled = datetime.datetime.utcnow()
948
if not hasattr(self, "expires"):
949
self.expires = (datetime.datetime.utcnow()
950
+ self.timeout)
951
else:
952
self.last_enabled = None
953
self.expires = None
954
520
955
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
956
logger.debug(" Key ID: %s", self.key_id)
524
957
logger.debug(" Fingerprint: %s", self.fingerprint)
525
self.created = settings.get("created", datetime.datetime.utcnow())
958
self.created = settings.get("created",
959
datetime.datetime.utcnow())
526
960
527
961
# attributes specific for this server instance
528
962
self.checker = None
532
966
self.current_checker_command = None
533
967
self.approved = None
534
968
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()
969
self.changedstate = multiprocessing_manager.Condition(
970
multiprocessing_manager.Lock())
971
self.client_structure = [attr
972
for attr in self.__dict__.keys()
540
973
if not attr.startswith("_")]
541
974
self.client_structure.append("client_structure")
542
543
for name, t in inspect.getmembers(type(self),
544
lambda obj:
545
isinstance(obj,
546
property)):
975
976
for name, t in inspect.getmembers(
977
type(self), lambda obj: isinstance(obj, property)):
547
978
if not name.startswith("_"):
548
979
self.client_structure.append(name)
549
980
550
981
# Send notice to process children that client state has changed
551
982
def send_changedstate(self):
552
983
with self.changedstate:
553
984
self.changedstate.notify_all()
554
985
555
986
def enable(self):
556
987
"""Start this client's checker and timeout hooks"""
557
988
if getattr(self, "enabled", False):
558
989
# Already enabled
559
990
return
560
self.send_changedstate()
561
991
self.expires = datetime.datetime.utcnow() + self.timeout
562
992
self.enabled = True
563
993
self.last_enabled = datetime.datetime.utcnow()
564
994
self.init_checker()
565
995
self.send_changedstate()
996
566
997
def disable(self, quiet=True):
567
998
"""Disable this client."""
568
999
if not getattr(self, "enabled", False):
569
1000
return False
570
1001
if not quiet:
571
self.send_changedstate()
572
if not quiet:
573
1002
logger.info("Disabling client %s", self.name)
574
if getattr(self, "disable_initiator_tag", False):
575
gobject.source_remove(self.disable_initiator_tag)
1003
if getattr(self, "disable_initiator_tag", None) is not None:
1004
GLib.source_remove(self.disable_initiator_tag)
576
1005
self.disable_initiator_tag = None
577
1006
self.expires = None
578
if getattr(self, "checker_initiator_tag", False):
579
gobject.source_remove(self.checker_initiator_tag)
1007
if getattr(self, "checker_initiator_tag", None) is not None:
1008
GLib.source_remove(self.checker_initiator_tag)
580
1009
self.checker_initiator_tag = None
581
1010
self.stop_checker()
582
1011
self.enabled = False
583
# Do not run this again if called by a gobject.timeout_add
1012
if not quiet:
1013
self.send_changedstate()
1014
# Do not run this again if called by a GLib.timeout_add
584
1015
return False
585
1016
586
1017
def __del__(self):
587
1018
self.disable()
588
1019
589
1020
def init_checker(self):
590
1021
# Schedule a new checker to be started an 'interval' from now,
591
1022
# and every interval from then on.
592
self.checker_initiator_tag = (gobject.timeout_add
593
(self.interval_milliseconds(),
594
self.start_checker))
1023
if self.checker_initiator_tag is not None:
1024
GLib.source_remove(self.checker_initiator_tag)
1025
self.checker_initiator_tag = GLib.timeout_add(
1026
int(self.interval.total_seconds() * 1000),
1027
self.start_checker)
595
1028
# Schedule a disable() when 'timeout' has passed
596
self.disable_initiator_tag = (gobject.timeout_add
597
(self.timeout_milliseconds(),
598
self.disable))
1029
if self.disable_initiator_tag is not None:
1030
GLib.source_remove(self.disable_initiator_tag)
1031
self.disable_initiator_tag = GLib.timeout_add(
1032
int(self.timeout.total_seconds() * 1000), self.disable)
599
1033
# Also start a new checker *right now*.
600
1034
self.start_checker()
601
602
def checker_callback(self, pid, condition, command):
1035
1036
def checker_callback(self, source, condition, connection,
1037
command):
603
1038
"""The checker has completed, so take appropriate actions."""
604
1039
self.checker_callback_tag = None
605
1040
self.checker = None
606
if os.WIFEXITED(condition):
607
self.last_checker_status = os.WEXITSTATUS(condition)
1041
# Read return code from connection (see call_pipe)
1042
returncode = connection.recv()
1043
connection.close()
1044
1045
if returncode >= 0:
1046
self.last_checker_status = returncode
1047
self.last_checker_signal = None
608
1048
if self.last_checker_status == 0:
609
1049
logger.info("Checker for %(name)s succeeded",
610
1050
vars(self))
611
1051
self.checked_ok()
612
1052
else:
613
logger.info("Checker for %(name)s failed",
614
vars(self))
1053
logger.info("Checker for %(name)s failed", vars(self))
615
1054
else:
616
1055
self.last_checker_status = -1
1056
self.last_checker_signal = -returncode
617
1057
logger.warning("Checker for %(name)s crashed?",
618
1058
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
"""
1059
return False
1060
1061
def checked_ok(self):
1062
"""Assert that the client has been seen, alive and well."""
1063
self.last_checked_ok = datetime.datetime.utcnow()
1064
self.last_checker_status = 0
1065
self.last_checker_signal = None
1066
self.bump_timeout()
1067
1068
def bump_timeout(self, timeout=None):
1069
"""Bump up the timeout for this client."""
626
1070
if timeout is None:
627
1071
timeout = self.timeout
628
self.last_checked_ok = datetime.datetime.utcnow()
629
1072
if self.disable_initiator_tag is not None:
630
gobject.source_remove(self.disable_initiator_tag)
1073
GLib.source_remove(self.disable_initiator_tag)
1074
self.disable_initiator_tag = None
631
1075
if getattr(self, "enabled", False):
632
self.disable_initiator_tag = (gobject.timeout_add
633
(timedelta_to_milliseconds
634
(timeout), self.disable))
1076
self.disable_initiator_tag = GLib.timeout_add(
1077
int(timeout.total_seconds() * 1000), self.disable)
635
1078
self.expires = datetime.datetime.utcnow() + timeout
636
1079
637
1080
def need_approval(self):
638
1081
self.last_approval_request = datetime.datetime.utcnow()
639
1082
640
1083
def start_checker(self):
641
1084
"""Start a new checker subprocess if one is not running.
642
1085
643
1086
If a checker already exists, leave it running and do
644
1087
nothing."""
645
1088
# 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
1089
# did that, and if a checker (for some reason) started running
1090
# slowly and taking more than 'interval' time, then the client
1091
# would inevitably timeout, since no checker would get a
1092
# chance to run to completion. If we instead leave running
650
1093
# checkers alone, the checker would have to take more time
651
1094
# than 'timeout' for the client to be disabled, which is as it
652
1095
# 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)
1096
1097
if self.checker is not None and not self.checker.is_alive():
1098
logger.warning("Checker was not alive; joining")
1099
self.checker.join()
1100
self.checker = None
667
1101
# Start a new checker if needed
668
1102
if self.checker is None:
1103
# Escape attributes for the shell
1104
escaped_attrs = {
1105
attr: re.escape(str(getattr(self, attr)))
1106
for attr in self.runtime_expansions}
669
1107
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
1108
command = self.checker_command % escaped_attrs
1109
except TypeError as error:
1110
logger.error('Could not format string "%s"',
1111
self.checker_command,
1112
exc_info=error)
1113
return True # Try again later
688
1114
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
1115
logger.info("Starting checker %r for %s", command,
1116
self.name)
1117
# We don't need to redirect stdout and stderr, since
1118
# in normal mode, that is already done by daemon(),
1119
# and in debug mode we don't want to. (Stdin is
1120
# always replaced by /dev/null.)
1121
# The exception is when not debugging but nevertheless
1122
# running in the foreground; use the previously
1123
# created wnull.
1124
popen_args = {"close_fds": True,
1125
"shell": True,
1126
"cwd": "/"}
1127
if (not self.server_settings["debug"]
1128
and self.server_settings["foreground"]):
1129
popen_args.update({"stdout": wnull,
1130
"stderr": wnull})
1131
pipe = multiprocessing.Pipe(duplex=False)
1132
self.checker = multiprocessing.Process(
1133
target=call_pipe,
1134
args=(pipe[1], subprocess.call, command),
1135
kwargs=popen_args)
1136
self.checker.start()
1137
self.checker_callback_tag = GLib.io_add_watch(
1138
pipe[0].fileno(), GLib.IO_IN,
1139
self.checker_callback, pipe[0], command)
1140
# Re-run this periodically if run by GLib.timeout_add
713
1141
return True
714
1142
715
1143
def stop_checker(self):
716
1144
"""Force the checker process, if any, to stop."""
717
1145
if self.checker_callback_tag:
718
gobject.source_remove(self.checker_callback_tag)
1146
GLib.source_remove(self.checker_callback_tag)
719
1147
self.checker_callback_tag = None
720
1148
if getattr(self, "checker", None) is None:
721
1149
return
722
1150
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
1151
self.checker.terminate()
731
1152
self.checker = None
732
1153
733
1154
734
def dbus_service_property(dbus_interface, signature="v",
735
access="readwrite", byte_arrays=False):
1155
def dbus_service_property(dbus_interface,
1156
signature="v",
1157
access="readwrite",
1158
byte_arrays=False):
736
1159
"""Decorators for marking methods of a DBusObjectWithProperties to
737
1160
become properties on the D-Bus.
738
1161
739
1162
The decorated method will be called with no arguments by "Get"
740
1163
and with one argument by "Set".
741
1164
742
1165
The parameters, where they are supported, are the same as
743
1166
dbus.service.method, except there is only "signature", since the
744
1167
type from Get() and the type sent to Set() is the same.
747
1170
# "Set" method, so we fail early here:
748
1171
if byte_arrays and signature != "ay":
749
1172
raise ValueError("Byte arrays not supported for non-'ay'"
750
" signature %r" % signature)
1173
" signature {!r}".format(signature))
1174
751
1175
def decorator(func):
752
1176
func._dbus_is_property = True
753
1177
func._dbus_interface = dbus_interface
756
1180
func._dbus_name = func.__name__
757
1181
if func._dbus_name.endswith("_dbus_property"):
758
1182
func._dbus_name = func._dbus_name[:-14]
759
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
760
return func
1183
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1184
return func
1185
1186
return decorator
1187
1188
1189
def dbus_interface_annotations(dbus_interface):
1190
"""Decorator for marking functions returning interface annotations
1191
1192
Usage:
1193
1194
@dbus_interface_annotations("org.example.Interface")
1195
def _foo(self): # Function name does not matter
1196
return {"org.freedesktop.DBus.Deprecated": "true",
1197
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1198
"false"}
1199
"""
1200
1201
def decorator(func):
1202
func._dbus_is_interface = True
1203
func._dbus_interface = dbus_interface
1204
func._dbus_name = dbus_interface
1205
return func
1206
1207
return decorator
1208
1209
1210
def dbus_annotations(annotations):
1211
"""Decorator to annotate D-Bus methods, signals or properties
1212
Usage:
1213
1214
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1215
"org.freedesktop.DBus.Property."
1216
"EmitsChangedSignal": "false"})
1217
@dbus_service_property("org.example.Interface", signature="b",
1218
access="r")
1219
def Property_dbus_property(self):
1220
return dbus.Boolean(False)
1221
1222
See also the DBusObjectWithAnnotations class.
1223
"""
1224
1225
def decorator(func):
1226
func._dbus_annotations = annotations
1227
return func
1228
761
1229
return decorator
762
1230
763
1231
764
1232
class DBusPropertyException(dbus.exceptions.DBusException):
765
1233
"""A base class for D-Bus property-related exceptions
766
1234
"""
767
def __unicode__(self):
768
return unicode(str(self))
1235
pass
769
1236
770
1237
771
1238
class DBusPropertyAccessException(DBusPropertyException):
780
1247
pass
781
1248
782
1249
783
class DBusObjectWithProperties(dbus.service.Object):
1250
class DBusObjectWithAnnotations(dbus.service.Object):
1251
"""A D-Bus object with annotations.
1252
1253
Classes inheriting from this can use the dbus_annotations
1254
decorator to add annotations to methods or signals.
1255
"""
1256
1257
@staticmethod
1258
def _is_dbus_thing(thing):
1259
"""Returns a function testing if an attribute is a D-Bus thing
1260
1261
If called like _is_dbus_thing("method") it returns a function
1262
suitable for use as predicate to inspect.getmembers().
1263
"""
1264
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1265
False)
1266
1267
def _get_all_dbus_things(self, thing):
1268
"""Returns a generator of (name, attribute) pairs
1269
"""
1270
return ((getattr(athing.__get__(self), "_dbus_name", name),
1271
athing.__get__(self))
1272
for cls in self.__class__.__mro__
1273
for name, athing in
1274
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1275
1276
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1277
out_signature="s",
1278
path_keyword='object_path',
1279
connection_keyword='connection')
1280
def Introspect(self, object_path, connection):
1281
"""Overloading of standard D-Bus method.
1282
1283
Inserts annotation tags on methods and signals.
1284
"""
1285
xmlstring = dbus.service.Object.Introspect(self, object_path,
1286
connection)
1287
try:
1288
document = xml.dom.minidom.parseString(xmlstring)
1289
1290
for if_tag in document.getElementsByTagName("interface"):
1291
# Add annotation tags
1292
for typ in ("method", "signal"):
1293
for tag in if_tag.getElementsByTagName(typ):
1294
annots = dict()
1295
for name, prop in (self.
1296
_get_all_dbus_things(typ)):
1297
if (name == tag.getAttribute("name")
1298
and prop._dbus_interface
1299
== if_tag.getAttribute("name")):
1300
annots.update(getattr(
1301
prop, "_dbus_annotations", {}))
1302
for name, value in annots.items():
1303
ann_tag = document.createElement(
1304
"annotation")
1305
ann_tag.setAttribute("name", name)
1306
ann_tag.setAttribute("value", value)
1307
tag.appendChild(ann_tag)
1308
# Add interface annotation tags
1309
for annotation, value in dict(
1310
itertools.chain.from_iterable(
1311
annotations().items()
1312
for name, annotations
1313
in self._get_all_dbus_things("interface")
1314
if name == if_tag.getAttribute("name")
1315
)).items():
1316
ann_tag = document.createElement("annotation")
1317
ann_tag.setAttribute("name", annotation)
1318
ann_tag.setAttribute("value", value)
1319
if_tag.appendChild(ann_tag)
1320
# Fix argument name for the Introspect method itself
1321
if (if_tag.getAttribute("name")
1322
== dbus.INTROSPECTABLE_IFACE):
1323
for cn in if_tag.getElementsByTagName("method"):
1324
if cn.getAttribute("name") == "Introspect":
1325
for arg in cn.getElementsByTagName("arg"):
1326
if (arg.getAttribute("direction")
1327
== "out"):
1328
arg.setAttribute("name",
1329
"xml_data")
1330
xmlstring = document.toxml("utf-8")
1331
document.unlink()
1332
except (AttributeError, xml.dom.DOMException,
1333
xml.parsers.expat.ExpatError) as error:
1334
logger.error("Failed to override Introspection method",
1335
exc_info=error)
1336
return xmlstring
1337
1338
1339
class DBusObjectWithProperties(DBusObjectWithAnnotations):
784
1340
"""A D-Bus object with properties.
785
1341
786
1342
Classes inheriting from this can use the dbus_service_property
787
1343
decorator to expose methods as D-Bus properties. It exposes the
788
1344
standard Get(), Set(), and GetAll() methods on the D-Bus.
789
1345
"""
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
1346
803
1347
def _get_dbus_property(self, interface_name, property_name):
804
1348
"""Returns a bound method if one exists which is a D-Bus
805
1349
property with the specified name and interface.
806
1350
"""
807
for cls in self.__class__.__mro__:
808
for name, value in (inspect.getmembers
809
(cls, self._is_dbus_property)):
1351
for cls in self.__class__.__mro__:
1352
for name, value in inspect.getmembers(
1353
cls, self._is_dbus_thing("property")):
810
1354
if (value._dbus_name == property_name
811
1355
and value._dbus_interface == interface_name):
812
1356
return value.__get__(self)
813
1357
814
1358
# 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",
1359
raise DBusPropertyNotFound("{}:{}.{}".format(
1360
self.dbus_object_path, interface_name, property_name))
1361
1362
@classmethod
1363
def _get_all_interface_names(cls):
1364
"""Get a sequence of all interfaces supported by an object"""
1365
return (name for name in set(getattr(getattr(x, attr),
1366
"_dbus_interface", None)
1367
for x in (inspect.getmro(cls))
1368
for attr in dir(x))
1369
if name is not None)
1370
1371
@dbus.service.method(dbus.PROPERTIES_IFACE,
1372
in_signature="ss",
820
1373
out_signature="v")
821
1374
def Get(self, interface_name, property_name):
822
1375
"""Standard D-Bus property Get() method, see D-Bus standard.
828
1381
if not hasattr(value, "variant_level"):
829
1382
return value
830
1383
return type(value)(value, variant_level=value.variant_level+1)
831
1384
832
1385
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
833
1386
def Set(self, interface_name, property_name, value):
834
1387
"""Standard D-Bus property Set() method, see D-Bus standard.
840
1393
# The byte_arrays option is not supported yet on
841
1394
# signatures other than "ay".
842
1395
if prop._dbus_signature != "ay":
843
raise ValueError
844
value = dbus.ByteArray(''.join(unichr(byte)
845
for byte in value))
1396
raise ValueError("Byte arrays not supported for non-"
1397
"'ay' signature {!r}"
1398
.format(prop._dbus_signature))
1399
value = dbus.ByteArray(b''.join(chr(byte)
1400
for byte in value))
846
1401
prop(value)
847
848
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1402
1403
@dbus.service.method(dbus.PROPERTIES_IFACE,
1404
in_signature="s",
849
1405
out_signature="a{sv}")
850
1406
def GetAll(self, interface_name):
851
1407
"""Standard D-Bus property GetAll() method, see D-Bus
852
1408
standard.
853
1409
854
1410
Note: Will not include properties with access="write".
855
1411
"""
856
1412
properties = {}
857
for name, prop in self._get_all_dbus_properties():
1413
for name, prop in self._get_all_dbus_things("property"):
858
1414
if (interface_name
859
1415
and interface_name != prop._dbus_interface):
860
1416
# Interface non-empty but did not match
866
1422
if not hasattr(value, "variant_level"):
867
1423
properties[name] = value
868
1424
continue
869
properties[name] = type(value)(value, variant_level=
870
value.variant_level+1)
1425
properties[name] = type(value)(
1426
value, variant_level=value.variant_level + 1)
871
1427
return dbus.Dictionary(properties, signature="sv")
872
1428
1429
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1430
def PropertiesChanged(self, interface_name, changed_properties,
1431
invalidated_properties):
1432
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1433
standard.
1434
"""
1435
pass
1436
873
1437
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
874
1438
out_signature="s",
875
1439
path_keyword='object_path',
876
1440
connection_keyword='connection')
877
1441
def Introspect(self, object_path, connection):
878
"""Standard D-Bus method, overloaded to insert property tags.
1442
"""Overloading of standard D-Bus method.
1443
1444
Inserts property tags and interface annotation tags.
879
1445
"""
880
xmlstring = dbus.service.Object.Introspect(self, object_path,
881
connection)
1446
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1447
object_path,
1448
connection)
882
1449
try:
883
1450
document = xml.dom.minidom.parseString(xmlstring)
1451
884
1452
def make_tag(document, name, prop):
885
1453
e = document.createElement("property")
886
1454
e.setAttribute("name", name)
887
1455
e.setAttribute("type", prop._dbus_signature)
888
1456
e.setAttribute("access", prop._dbus_access)
889
1457
return e
1458
890
1459
for if_tag in document.getElementsByTagName("interface"):
1460
# Add property tags
891
1461
for tag in (make_tag(document, name, prop)
892
1462
for name, prop
893
in self._get_all_dbus_properties()
1463
in self._get_all_dbus_things("property")
894
1464
if prop._dbus_interface
895
1465
== if_tag.getAttribute("name")):
896
1466
if_tag.appendChild(tag)
1467
# Add annotation tags for properties
1468
for tag in if_tag.getElementsByTagName("property"):
1469
annots = dict()
1470
for name, prop in self._get_all_dbus_things(
1471
"property"):
1472
if (name == tag.getAttribute("name")
1473
and prop._dbus_interface
1474
== if_tag.getAttribute("name")):
1475
annots.update(getattr(
1476
prop, "_dbus_annotations", {}))
1477
for name, value in annots.items():
1478
ann_tag = document.createElement(
1479
"annotation")
1480
ann_tag.setAttribute("name", name)
1481
ann_tag.setAttribute("value", value)
1482
tag.appendChild(ann_tag)
897
1483
# Add the names to the return values for the
898
1484
# "org.freedesktop.DBus.Properties" methods
899
1485
if (if_tag.getAttribute("name")
914
1500
except (AttributeError, xml.dom.DOMException,
915
1501
xml.parsers.expat.ExpatError) as error:
916
1502
logger.error("Failed to override Introspection method",
917
error)
918
return xmlstring
919
920
921
def datetime_to_dbus (dt, variant_level=0):
1503
exc_info=error)
1504
return xmlstring
1505
1506
1507
try:
1508
dbus.OBJECT_MANAGER_IFACE
1509
except AttributeError:
1510
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1511
1512
1513
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1514
"""A D-Bus object with an ObjectManager.
1515
1516
Classes inheriting from this exposes the standard
1517
GetManagedObjects call and the InterfacesAdded and
1518
InterfacesRemoved signals on the standard
1519
"org.freedesktop.DBus.ObjectManager" interface.
1520
1521
Note: No signals are sent automatically; they must be sent
1522
manually.
1523
"""
1524
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1525
out_signature="a{oa{sa{sv}}}")
1526
def GetManagedObjects(self):
1527
"""This function must be overridden"""
1528
raise NotImplementedError()
1529
1530
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1531
signature="oa{sa{sv}}")
1532
def InterfacesAdded(self, object_path, interfaces_and_properties):
1533
pass
1534
1535
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1536
def InterfacesRemoved(self, object_path, interfaces):
1537
pass
1538
1539
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1540
out_signature="s",
1541
path_keyword='object_path',
1542
connection_keyword='connection')
1543
def Introspect(self, object_path, connection):
1544
"""Overloading of standard D-Bus method.
1545
1546
Override return argument name of GetManagedObjects to be
1547
"objpath_interfaces_and_properties"
1548
"""
1549
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1550
object_path,
1551
connection)
1552
try:
1553
document = xml.dom.minidom.parseString(xmlstring)
1554
1555
for if_tag in document.getElementsByTagName("interface"):
1556
# Fix argument name for the GetManagedObjects method
1557
if (if_tag.getAttribute("name")
1558
== dbus.OBJECT_MANAGER_IFACE):
1559
for cn in if_tag.getElementsByTagName("method"):
1560
if (cn.getAttribute("name")
1561
== "GetManagedObjects"):
1562
for arg in cn.getElementsByTagName("arg"):
1563
if (arg.getAttribute("direction")
1564
== "out"):
1565
arg.setAttribute(
1566
"name",
1567
"objpath_interfaces"
1568
"_and_properties")
1569
xmlstring = document.toxml("utf-8")
1570
document.unlink()
1571
except (AttributeError, xml.dom.DOMException,
1572
xml.parsers.expat.ExpatError) as error:
1573
logger.error("Failed to override Introspection method",
1574
exc_info=error)
1575
return xmlstring
1576
1577
1578
def datetime_to_dbus(dt, variant_level=0):
922
1579
"""Convert a UTC datetime.datetime() to a D-Bus type."""
923
1580
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.
1581
return dbus.String("", variant_level=variant_level)
1582
return dbus.String(dt.isoformat(), variant_level=variant_level)
1583
1584
1585
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1586
"""A class decorator; applied to a subclass of
1587
dbus.service.Object, it will add alternate D-Bus attributes with
1588
interface names according to the "alt_interface_names" mapping.
1589
Usage:
1590
1591
@alternate_dbus_interfaces({"org.example.Interface":
1592
"net.example.AlternateInterface"})
1593
class SampleDBusObject(dbus.service.Object):
1594
@dbus.service.method("org.example.Interface")
1595
def SampleDBusMethod():
1596
pass
1597
1598
The above "SampleDBusMethod" on "SampleDBusObject" will be
1599
reachable via two interfaces: "org.example.Interface" and
1600
"net.example.AlternateInterface", the latter of which will have
1601
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1602
"true", unless "deprecate" is passed with a False value.
1603
1604
This works for methods and signals, and also for D-Bus properties
1605
(from DBusObjectWithProperties) and interfaces (from the
1606
dbus_interface_annotations decorator).
933
1607
"""
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):
1608
1609
def wrapper(cls):
1610
for orig_interface_name, alt_interface_name in (
1611
alt_interface_names.items()):
1612
attr = {}
1613
interface_names = set()
1614
# Go though all attributes of the class
1615
for attrname, attribute in inspect.getmembers(cls):
941
1616
# Ignore non-D-Bus attributes, and D-Bus attributes
942
1617
# with the wrong interface name
943
1618
if (not hasattr(attribute, "_dbus_interface")
944
or not attribute._dbus_interface
945
.startswith("se.recompile.Mandos")):
1619
or not attribute._dbus_interface.startswith(
1620
orig_interface_name)):
946
1621
continue
947
1622
# Create an alternate D-Bus interface name based on
948
1623
# the current name
949
alt_interface = (attribute._dbus_interface
950
.replace("se.recompile.Mandos",
951
"se.bsnet.fukt.Mandos"))
1624
alt_interface = attribute._dbus_interface.replace(
1625
orig_interface_name, alt_interface_name)
1626
interface_names.add(alt_interface)
952
1627
# Is this a D-Bus signal?
953
1628
if getattr(attribute, "_dbus_is_signal", False):
954
# Extract the original non-method function by
955
# black magic
956
nonmethod_func = (dict(
1629
# Extract the original non-method undecorated
1630
# function by black magic
1631
if sys.version_info.major == 2:
1632
nonmethod_func = (dict(
957
1633
zip(attribute.func_code.co_freevars,
958
attribute.__closure__))["func"]
959
.cell_contents)
1634
attribute.__closure__))
1635
["func"].cell_contents)
1636
else:
1637
nonmethod_func = (dict(
1638
zip(attribute.__code__.co_freevars,
1639
attribute.__closure__))
1640
["func"].cell_contents)
960
1641
# Create a new, but exactly alike, function
961
1642
# object, and decorate it to be a new D-Bus signal
962
1643
# 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)))
1644
new_function = copy_function(nonmethod_func)
1645
new_function = (dbus.service.signal(
1646
alt_interface,
1647
attribute._dbus_signature)(new_function))
1648
# Copy annotations, if any
1649
try:
1650
new_function._dbus_annotations = dict(
1651
attribute._dbus_annotations)
1652
except AttributeError:
1653
pass
1654
972
1655
# 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
1656
# original and alternate functions, so both the
1657
# original and alternate signals gets sent when
1658
# the function is called
975
1659
def fixscope(func1, func2):
976
1660
"""This function is a scope container to pass
977
1661
func1 and func2 to the "call_both" function
978
1662
outside of its arguments"""
1663
1664
@functools.wraps(func2)
979
1665
def call_both(*args, **kwargs):
980
1666
"""This function will emit two D-Bus
981
1667
signals by calling func1 and func2"""
982
1668
func1(*args, **kwargs)
983
1669
func2(*args, **kwargs)
1670
# Make wrapper function look like a D-Bus
1671
# signal
1672
for name, attr in inspect.getmembers(func2):
1673
if name.startswith("_dbus_"):
1674
setattr(call_both, name, attr)
1675
984
1676
return call_both
985
1677
# Create the "call_both" function and add it to
986
1678
# the class
987
attr[attrname] = fixscope(attribute,
988
new_function)
1679
attr[attrname] = fixscope(attribute, new_function)
989
1680
# Is this a D-Bus method?
990
1681
elif getattr(attribute, "_dbus_is_method", False):
991
1682
# Create a new, but exactly alike, function
992
1683
# object. Decorate it to be a new D-Bus method
993
1684
# with the alternate D-Bus interface name. Add it
994
1685
# 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)))
1686
attr[attrname] = (
1687
dbus.service.method(
1688
alt_interface,
1689
attribute._dbus_in_signature,
1690
attribute._dbus_out_signature)
1691
(copy_function(attribute)))
1692
# Copy annotations, if any
1693
try:
1694
attr[attrname]._dbus_annotations = dict(
1695
attribute._dbus_annotations)
1696
except AttributeError:
1697
pass
1005
1698
# Is this a D-Bus property?
1006
1699
elif getattr(attribute, "_dbus_is_property", False):
1007
1700
# Create a new, but exactly alike, function
1008
1701
# object, and decorate it to be a new D-Bus
1009
1702
# property with the alternate D-Bus interface
1010
1703
# 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
1704
attr[attrname] = (dbus_service_property(
1705
alt_interface, attribute._dbus_signature,
1706
attribute._dbus_access,
1707
attribute._dbus_get_args_options
1708
["byte_arrays"])
1709
(copy_function(attribute)))
1710
# Copy annotations, if any
1711
try:
1712
attr[attrname]._dbus_annotations = dict(
1713
attribute._dbus_annotations)
1714
except AttributeError:
1715
pass
1716
# Is this a D-Bus interface?
1717
elif getattr(attribute, "_dbus_is_interface", False):
1718
# Create a new, but exactly alike, function
1719
# object. Decorate it to be a new D-Bus interface
1720
# with the alternate D-Bus interface name. Add it
1721
# to the class.
1722
attr[attrname] = (
1723
dbus_interface_annotations(alt_interface)
1724
(copy_function(attribute)))
1725
if deprecate:
1726
# Deprecate all alternate interfaces
1727
iname = "_AlternateDBusNames_interface_annotation{}"
1728
for interface_name in interface_names:
1729
1730
@dbus_interface_annotations(interface_name)
1731
def func(self):
1732
return {"org.freedesktop.DBus.Deprecated":
1733
"true"}
1734
# Find an unused name
1735
for aname in (iname.format(i)
1736
for i in itertools.count()):
1737
if aname not in attr:
1738
attr[aname] = func
1739
break
1740
if interface_names:
1741
# Replace the class with a new subclass of it with
1742
# methods, signals, etc. as created above.
1743
if sys.version_info.major == 2:
1744
cls = type(b"{}Alternate".format(cls.__name__),
1745
(cls, ), attr)
1746
else:
1747
cls = type("{}Alternate".format(cls.__name__),
1748
(cls, ), attr)
1749
return cls
1750
1751
return wrapper
1752
1753
1754
@alternate_dbus_interfaces({"se.recompile.Mandos":
1755
"se.bsnet.fukt.Mandos"})
1027
1756
class ClientDBus(Client, DBusObjectWithProperties):
1028
1757
"""A Client class using D-Bus
1029
1758
1030
1759
Attributes:
1031
1760
dbus_object_path: dbus.ObjectPath
1032
1761
bus: dbus.SystemBus()
1033
1762
"""
1034
1763
1035
1764
runtime_expansions = (Client.runtime_expansions
1036
+ ("dbus_object_path",))
1037
1765
+ ("dbus_object_path", ))
1766
1767
_interface = "se.recompile.Mandos.Client"
1768
1038
1769
# dbus.service.Object doesn't use super(), so we can't either.
1039
1040
def __init__(self, bus = None, *args, **kwargs):
1770
1771
def __init__(self, bus=None, *args, **kwargs):
1041
1772
self.bus = bus
1042
1773
Client.__init__(self, *args, **kwargs)
1043
self._approvals_pending = 0
1044
1045
self._approvals_pending = 0
1046
1774
# Only now, when this client is initialized, can it show up on
1047
1775
# the D-Bus
1048
client_object_name = unicode(self.name).translate(
1776
client_object_name = str(self.name).translate(
1049
1777
{ord("."): ord("_"),
1050
1778
ord("-"): ord("_")})
1051
self.dbus_object_path = (dbus.ObjectPath
1052
("/clients/" + client_object_name))
1779
self.dbus_object_path = dbus.ObjectPath(
1780
"/clients/" + client_object_name)
1053
1781
DBusObjectWithProperties.__init__(self, self.bus,
1054
1782
self.dbus_object_path)
1055
1056
def notifychangeproperty(transform_func,
1057
dbus_name, type_func=lambda x: x,
1058
variant_level=1):
1783
1784
def notifychangeproperty(transform_func, dbus_name,
1785
type_func=lambda x: x,
1786
variant_level=1,
1787
invalidate_only=False,
1788
_interface=_interface):
1059
1789
""" Modify a variable so that it's a property which announces
1060
1790
its changes to DBus.
1061
1791
1062
1792
transform_fun: Function that takes a value and a variant_level
1063
1793
and transforms it to a D-Bus type.
1064
1794
dbus_name: D-Bus name of the variable
1066
1796
to the D-Bus. Default: no transform
1067
1797
variant_level: D-Bus variant level. Default: 1
1068
1798
"""
1069
attrname = "_{0}".format(dbus_name)
1799
attrname = "_{}".format(dbus_name)
1800
1070
1801
def setter(self, value):
1071
1802
if hasattr(self, "dbus_object_path"):
1072
1803
if (not hasattr(self, attrname) or
1073
1804
type_func(getattr(self, attrname, None))
1074
1805
!= 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)
1806
if invalidate_only:
1807
self.PropertiesChanged(
1808
_interface, dbus.Dictionary(),
1809
dbus.Array((dbus_name, )))
1810
else:
1811
dbus_value = transform_func(
1812
type_func(value),
1813
variant_level=variant_level)
1814
self.PropertyChanged(dbus.String(dbus_name),
1815
dbus_value)
1816
self.PropertiesChanged(
1817
_interface,
1818
dbus.Dictionary({dbus.String(dbus_name):
1819
dbus_value}),
1820
dbus.Array())
1080
1821
setattr(self, attrname, value)
1081
1822
1082
1823
return property(lambda self: getattr(self, attrname), setter)
1083
1084
1824
1085
1825
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1086
1826
approvals_pending = notifychangeproperty(dbus.Boolean,
1087
1827
"ApprovalPending",
1088
type_func = bool)
1828
type_func=bool)
1089
1829
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1090
1830
last_enabled = notifychangeproperty(datetime_to_dbus,
1091
1831
"LastEnabled")
1092
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1093
type_func = lambda checker:
1094
checker is not None)
1832
checker = notifychangeproperty(
1833
dbus.Boolean, "CheckerRunning",
1834
type_func=lambda checker: checker is not None)
1095
1835
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1096
1836
"LastCheckedOK")
1837
last_checker_status = notifychangeproperty(dbus.Int16,
1838
"LastCheckerStatus")
1097
1839
last_approval_request = notifychangeproperty(
1098
1840
datetime_to_dbus, "LastApprovalRequest")
1099
1841
approved_by_default = notifychangeproperty(dbus.Boolean,
1100
1842
"ApprovedByDefault")
1101
approval_delay = notifychangeproperty(dbus.UInt64,
1102
"ApprovalDelay",
1103
type_func =
1104
timedelta_to_milliseconds)
1843
approval_delay = notifychangeproperty(
1844
dbus.UInt64, "ApprovalDelay",
1845
type_func=lambda td: td.total_seconds() * 1000)
1105
1846
approval_duration = notifychangeproperty(
1106
1847
dbus.UInt64, "ApprovalDuration",
1107
type_func = timedelta_to_milliseconds)
1848
type_func=lambda td: td.total_seconds() * 1000)
1108
1849
host = notifychangeproperty(dbus.String, "Host")
1109
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1110
type_func =
1111
timedelta_to_milliseconds)
1850
timeout = notifychangeproperty(
1851
dbus.UInt64, "Timeout",
1852
type_func=lambda td: td.total_seconds() * 1000)
1112
1853
extended_timeout = notifychangeproperty(
1113
1854
dbus.UInt64, "ExtendedTimeout",
1114
type_func = timedelta_to_milliseconds)
1115
interval = notifychangeproperty(dbus.UInt64,
1116
"Interval",
1117
type_func =
1118
timedelta_to_milliseconds)
1855
type_func=lambda td: td.total_seconds() * 1000)
1856
interval = notifychangeproperty(
1857
dbus.UInt64, "Interval",
1858
type_func=lambda td: td.total_seconds() * 1000)
1119
1859
checker_command = notifychangeproperty(dbus.String, "Checker")
1120
1860
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1861
invalidate_only=True)
1862
1121
1863
del notifychangeproperty
1122
1864
1123
1865
def __del__(self, *args, **kwargs):
1124
1866
try:
1125
1867
self.remove_from_connection()
1128
1870
if hasattr(DBusObjectWithProperties, "__del__"):
1129
1871
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1130
1872
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)
1873
1874
def checker_callback(self, source, condition,
1875
connection, command, *args, **kwargs):
1876
ret = Client.checker_callback(self, source, condition,
1877
connection, command, *args,
1878
**kwargs)
1879
exitstatus = self.last_checker_status
1880
if exitstatus >= 0:
1138
1881
# Emit D-Bus signal
1139
1882
self.CheckerCompleted(dbus.Int16(exitstatus),
1140
dbus.Int64(condition),
1883
# This is specific to GNU libC
1884
dbus.Int64(exitstatus << 8),
1141
1885
dbus.String(command))
1142
1886
else:
1143
1887
# Emit D-Bus signal
1144
1888
self.CheckerCompleted(dbus.Int16(-1),
1145
dbus.Int64(condition),
1889
dbus.Int64(
1890
# This is specific to GNU libC
1891
(exitstatus << 8)
1892
| self.last_checker_signal),
1146
1893
dbus.String(command))
1147
1148
return Client.checker_callback(self, pid, condition, command,
1149
*args, **kwargs)
1150
1894
return ret
1895
1151
1896
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
1897
old_checker_pid = getattr(self.checker, "pid", None)
1157
1898
r = Client.start_checker(self, *args, **kwargs)
1158
1899
# Only if new checker process was started
1159
1900
if (self.checker is not None
1161
1902
# Emit D-Bus signal
1162
1903
self.CheckerStarted(self.current_checker_command)
1163
1904
return r
1164
1905
1165
1906
def _reset_approved(self):
1166
1907
self.approved = None
1167
1908
return False
1168
1909
1169
1910
def approve(self, value=True):
1170
self.send_changedstate()
1171
1911
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
1912
GLib.timeout_add(int(self.approval_duration.total_seconds()
1913
* 1000), self._reset_approved)
1914
self.send_changedstate()
1915
1916
# D-Bus methods, signals & properties
1917
1918
# Interfaces
1919
1920
# Signals
1921
1182
1922
# CheckerCompleted - signal
1183
1923
@dbus.service.signal(_interface, signature="nxs")
1184
1924
def CheckerCompleted(self, exitcode, waitstatus, command):
1185
1925
"D-Bus signal"
1186
1926
pass
1187
1927
1188
1928
# CheckerStarted - signal
1189
1929
@dbus.service.signal(_interface, signature="s")
1190
1930
def CheckerStarted(self, command):
1191
1931
"D-Bus signal"
1192
1932
pass
1193
1933
1194
1934
# PropertyChanged - signal
1935
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1195
1936
@dbus.service.signal(_interface, signature="sv")
1196
1937
def PropertyChanged(self, property, value):
1197
1938
"D-Bus signal"
1198
1939
pass
1199
1940
1200
1941
# GotSecret - signal
1201
1942
@dbus.service.signal(_interface)
1202
1943
def GotSecret(self):
1205
1946
server to mandos-client
1206
1947
"""
1207
1948
pass
1208
1949
1209
1950
# Rejected - signal
1210
1951
@dbus.service.signal(_interface, signature="s")
1211
1952
def Rejected(self, reason):
1212
1953
"D-Bus signal"
1213
1954
pass
1214
1955
1215
1956
# NeedApproval - signal
1216
1957
@dbus.service.signal(_interface, signature="tb")
1217
1958
def NeedApproval(self, timeout, default):
1218
1959
"D-Bus signal"
1219
1960
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
1961
1962
# Methods
1963
1231
1964
# Approve - method
1232
1965
@dbus.service.method(_interface, in_signature="b")
1233
1966
def Approve(self, value):
1234
1967
self.approve(value)
1235
1968
1236
1969
# CheckedOK - method
1237
1970
@dbus.service.method(_interface)
1238
1971
def CheckedOK(self):
1239
1972
self.checked_ok()
1240
1973
1241
1974
# Enable - method
1975
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1242
1976
@dbus.service.method(_interface)
1243
1977
def Enable(self):
1244
1978
"D-Bus method"
1245
1979
self.enable()
1246
1980
1247
1981
# StartChecker - method
1982
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1248
1983
@dbus.service.method(_interface)
1249
1984
def StartChecker(self):
1250
1985
"D-Bus method"
1251
1986
self.start_checker()
1252
1987
1253
1988
# Disable - method
1989
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1254
1990
@dbus.service.method(_interface)
1255
1991
def Disable(self):
1256
1992
"D-Bus method"
1257
1993
self.disable()
1258
1994
1259
1995
# StopChecker - method
1996
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1260
1997
@dbus.service.method(_interface)
1261
1998
def StopChecker(self):
1262
1999
self.stop_checker()
1263
1264
## Properties
1265
2000
2001
# Properties
2002
1266
2003
# ApprovalPending - property
1267
2004
@dbus_service_property(_interface, signature="b", access="read")
1268
2005
def ApprovalPending_dbus_property(self):
1269
2006
return dbus.Boolean(bool(self.approvals_pending))
1270
2007
1271
2008
# ApprovedByDefault - property
1272
@dbus_service_property(_interface, signature="b",
2009
@dbus_service_property(_interface,
2010
signature="b",
1273
2011
access="readwrite")
1274
2012
def ApprovedByDefault_dbus_property(self, value=None):
1275
2013
if value is None: # get
1276
2014
return dbus.Boolean(self.approved_by_default)
1277
2015
self.approved_by_default = bool(value)
1278
2016
1279
2017
# ApprovalDelay - property
1280
@dbus_service_property(_interface, signature="t",
2018
@dbus_service_property(_interface,
2019
signature="t",
1281
2020
access="readwrite")
1282
2021
def ApprovalDelay_dbus_property(self, value=None):
1283
2022
if value is None: # get
1284
return dbus.UInt64(self.approval_delay_milliseconds())
2023
return dbus.UInt64(self.approval_delay.total_seconds()
2024
* 1000)
1285
2025
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1286
2026
1287
2027
# ApprovalDuration - property
1288
@dbus_service_property(_interface, signature="t",
2028
@dbus_service_property(_interface,
2029
signature="t",
1289
2030
access="readwrite")
1290
2031
def ApprovalDuration_dbus_property(self, value=None):
1291
2032
if value is None: # get
1292
return dbus.UInt64(timedelta_to_milliseconds(
1293
self.approval_duration))
2033
return dbus.UInt64(self.approval_duration.total_seconds()
2034
* 1000)
1294
2035
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1295
2036
1296
2037
# Name - property
2038
@dbus_annotations(
2039
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1297
2040
@dbus_service_property(_interface, signature="s", access="read")
1298
2041
def Name_dbus_property(self):
1299
2042
return dbus.String(self.name)
1300
2043
2044
# KeyID - property
2045
@dbus_annotations(
2046
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2047
@dbus_service_property(_interface, signature="s", access="read")
2048
def KeyID_dbus_property(self):
2049
return dbus.String(self.key_id)
2050
1301
2051
# Fingerprint - property
2052
@dbus_annotations(
2053
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1302
2054
@dbus_service_property(_interface, signature="s", access="read")
1303
2055
def Fingerprint_dbus_property(self):
1304
2056
return dbus.String(self.fingerprint)
1305
2057
1306
2058
# Host - property
1307
@dbus_service_property(_interface, signature="s",
2059
@dbus_service_property(_interface,
2060
signature="s",
1308
2061
access="readwrite")
1309
2062
def Host_dbus_property(self, value=None):
1310
2063
if value is None: # get
1311
2064
return dbus.String(self.host)
1312
self.host = unicode(value)
1313
2065
self.host = str(value)
2066
1314
2067
# Created - property
2068
@dbus_annotations(
2069
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1315
2070
@dbus_service_property(_interface, signature="s", access="read")
1316
2071
def Created_dbus_property(self):
1317
2072
return datetime_to_dbus(self.created)
1318
2073
1319
2074
# LastEnabled - property
1320
2075
@dbus_service_property(_interface, signature="s", access="read")
1321
2076
def LastEnabled_dbus_property(self):
1322
2077
return datetime_to_dbus(self.last_enabled)
1323
2078
1324
2079
# Enabled - property
1325
@dbus_service_property(_interface, signature="b",
2080
@dbus_service_property(_interface,
2081
signature="b",
1326
2082
access="readwrite")
1327
2083
def Enabled_dbus_property(self, value=None):
1328
2084
if value is None: # get
1331
2087
self.enable()
1332
2088
else:
1333
2089
self.disable()
1334
2090
1335
2091
# LastCheckedOK - property
1336
@dbus_service_property(_interface, signature="s",
2092
@dbus_service_property(_interface,
2093
signature="s",
1337
2094
access="readwrite")
1338
2095
def LastCheckedOK_dbus_property(self, value=None):
1339
2096
if value is not None:
1340
2097
self.checked_ok()
1341
2098
return
1342
2099
return datetime_to_dbus(self.last_checked_ok)
1343
2100
2101
# LastCheckerStatus - property
2102
@dbus_service_property(_interface, signature="n", access="read")
2103
def LastCheckerStatus_dbus_property(self):
2104
return dbus.Int16(self.last_checker_status)
2105
1344
2106
# Expires - property
1345
2107
@dbus_service_property(_interface, signature="s", access="read")
1346
2108
def Expires_dbus_property(self):
1347
2109
return datetime_to_dbus(self.expires)
1348
2110
1349
2111
# LastApprovalRequest - property
1350
2112
@dbus_service_property(_interface, signature="s", access="read")
1351
2113
def LastApprovalRequest_dbus_property(self):
1352
2114
return datetime_to_dbus(self.last_approval_request)
1353
2115
1354
2116
# Timeout - property
1355
@dbus_service_property(_interface, signature="t",
2117
@dbus_service_property(_interface,
2118
signature="t",
1356
2119
access="readwrite")
1357
2120
def Timeout_dbus_property(self, value=None):
1358
2121
if value is None: # get
1359
return dbus.UInt64(self.timeout_milliseconds())
2122
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2123
old_timeout = self.timeout
1360
2124
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
2125
# Reschedule disabling
2126
if self.enabled:
2127
now = datetime.datetime.utcnow()
2128
self.expires += self.timeout - old_timeout
2129
if self.expires <= now:
2130
# The timeout has passed
2131
self.disable()
2132
else:
2133
if (getattr(self, "disable_initiator_tag", None)
2134
is None):
2135
return
2136
GLib.source_remove(self.disable_initiator_tag)
2137
self.disable_initiator_tag = GLib.timeout_add(
2138
int((self.expires - now).total_seconds() * 1000),
2139
self.disable)
2140
1382
2141
# ExtendedTimeout - property
1383
@dbus_service_property(_interface, signature="t",
2142
@dbus_service_property(_interface,
2143
signature="t",
1384
2144
access="readwrite")
1385
2145
def ExtendedTimeout_dbus_property(self, value=None):
1386
2146
if value is None: # get
1387
return dbus.UInt64(self.extended_timeout_milliseconds())
2147
return dbus.UInt64(self.extended_timeout.total_seconds()
2148
* 1000)
1388
2149
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1389
2150
1390
2151
# Interval - property
1391
@dbus_service_property(_interface, signature="t",
2152
@dbus_service_property(_interface,
2153
signature="t",
1392
2154
access="readwrite")
1393
2155
def Interval_dbus_property(self, value=None):
1394
2156
if value is None: # get
1395
return dbus.UInt64(self.interval_milliseconds())
2157
return dbus.UInt64(self.interval.total_seconds() * 1000)
1396
2158
self.interval = datetime.timedelta(0, 0, 0, value)
1397
2159
if getattr(self, "checker_initiator_tag", None) is None:
1398
2160
return
1399
2161
if self.enabled:
1400
2162
# 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
2163
GLib.source_remove(self.checker_initiator_tag)
2164
self.checker_initiator_tag = GLib.timeout_add(
2165
value, self.start_checker)
2166
self.start_checker() # Start one now, too
2167
1406
2168
# Checker - property
1407
@dbus_service_property(_interface, signature="s",
2169
@dbus_service_property(_interface,
2170
signature="s",
1408
2171
access="readwrite")
1409
2172
def Checker_dbus_property(self, value=None):
1410
2173
if value is None: # get
1411
2174
return dbus.String(self.checker_command)
1412
self.checker_command = unicode(value)
1413
2175
self.checker_command = str(value)
2176
1414
2177
# CheckerRunning - property
1415
@dbus_service_property(_interface, signature="b",
2178
@dbus_service_property(_interface,
2179
signature="b",
1416
2180
access="readwrite")
1417
2181
def CheckerRunning_dbus_property(self, value=None):
1418
2182
if value is None: # get
1421
2185
self.start_checker()
1422
2186
else:
1423
2187
self.stop_checker()
1424
2188
1425
2189
# ObjectPath - property
2190
@dbus_annotations(
2191
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2192
"org.freedesktop.DBus.Deprecated": "true"})
1426
2193
@dbus_service_property(_interface, signature="o", access="read")
1427
2194
def ObjectPath_dbus_property(self):
1428
return self.dbus_object_path # is already a dbus.ObjectPath
1429
2195
return self.dbus_object_path # is already a dbus.ObjectPath
2196
1430
2197
# Secret = property
1431
@dbus_service_property(_interface, signature="ay",
1432
access="write", byte_arrays=True)
2198
@dbus_annotations(
2199
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2200
"invalidates"})
2201
@dbus_service_property(_interface,
2202
signature="ay",
2203
access="write",
2204
byte_arrays=True)
1433
2205
def Secret_dbus_property(self, value):
1434
self.secret = str(value)
1435
2206
self.secret = bytes(value)
2207
1436
2208
del _interface
1437
2209
1438
2210
1439
2211
class ProxyClient(object):
1440
def __init__(self, child_pipe, fpr, address):
2212
def __init__(self, child_pipe, key_id, fpr, address):
1441
2213
self._pipe = child_pipe
1442
self._pipe.send(('init', fpr, address))
2214
self._pipe.send(('init', key_id, fpr, address))
1443
2215
if not self._pipe.recv():
1444
raise KeyError()
1445
2216
raise KeyError(key_id or fpr)
2217
1446
2218
def __getattribute__(self, name):
1447
2219
if name == '_pipe':
1448
2220
return super(ProxyClient, self).__getattribute__(name)
1451
2223
if data[0] == 'data':
1452
2224
return data[1]
1453
2225
if data[0] == 'function':
2226
1454
2227
def func(*args, **kwargs):
1455
2228
self._pipe.send(('funcall', name, args, kwargs))
1456
2229
return self._pipe.recv()[1]
2230
1457
2231
return func
1458
2232
1459
2233
def __setattr__(self, name, value):
1460
2234
if name == '_pipe':
1461
2235
return super(ProxyClient, self).__setattr__(name, value)
1462
2236
self._pipe.send(('setattr', name, value))
1463
2237
1464
2238
1465
class ClientDBusTransitional(ClientDBus):
1466
__metaclass__ = AlternateDBusNamesMetaclass
1467
1468
1469
2239
class ClientHandler(socketserver.BaseRequestHandler, object):
1470
2240
"""A class to handle client connections.
1471
2241
1472
2242
Instantiated once for each connection to handle it.
1473
2243
Note: This will run in its own forked process."""
1474
2244
1475
2245
def handle(self):
1476
2246
with contextlib.closing(self.server.child_pipe) as child_pipe:
1477
2247
logger.info("TCP connection from: %s",
1478
unicode(self.client_address))
2248
str(self.client_address))
1479
2249
logger.debug("Pipe FD: %d",
1480
2250
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"))
2251
2252
session = gnutls.ClientSession(self.request)
2253
2254
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2255
# "+AES-256-CBC", "+SHA1",
2256
# "+COMP-NULL", "+CTYPE-OPENPGP",
2257
# "+DHE-DSS"))
1496
2258
# Use a fallback default, since this MUST be set.
1497
2259
priority = self.server.gnutls_priority
1498
2260
if priority is None:
1499
2261
priority = "NORMAL"
1500
(gnutls.library.functions
1501
.gnutls_priority_set_direct(session._c_object,
1502
priority, None))
1503
2262
gnutls.priority_set_direct(session._c_object,
2263
priority.encode("utf-8"),
2264
None)
2265
1504
2266
# Start communication using the Mandos protocol
1505
2267
# Get protocol number
1506
2268
line = self.request.makefile().readline()
1507
2269
logger.debug("Protocol version: %r", line)
1508
2270
try:
1509
2271
if int(line.strip().split()[0]) > 1:
1510
raise RuntimeError
2272
raise RuntimeError(line)
1511
2273
except (ValueError, IndexError, RuntimeError) as error:
1512
2274
logger.error("Unknown protocol version: %s", error)
1513
2275
return
1514
2276
1515
2277
# Start GnuTLS connection
1516
2278
try:
1517
2279
session.handshake()
1518
except gnutls.errors.GNUTLSError as error:
2280
except gnutls.Error as error:
1519
2281
logger.warning("Handshake failed: %s", error)
1520
2282
# Do not run session.bye() here: the session is not
1521
2283
# established. Just abandon the request.
1522
2284
return
1523
2285
logger.debug("Handshake succeeded")
1524
2286
1525
2287
approval_required = False
1526
2288
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,
2289
if gnutls.has_rawpk:
2290
fpr = ""
2291
try:
2292
key_id = self.key_id(
2293
self.peer_certificate(session))
2294
except (TypeError, gnutls.Error) as error:
2295
logger.warning("Bad certificate: %s", error)
2296
return
2297
logger.debug("Key ID: %s", key_id)
2298
2299
else:
2300
key_id = ""
2301
try:
2302
fpr = self.fingerprint(
2303
self.peer_certificate(session))
2304
except (TypeError, gnutls.Error) as error:
2305
logger.warning("Bad certificate: %s", error)
2306
return
2307
logger.debug("Fingerprint: %s", fpr)
2308
2309
try:
2310
client = ProxyClient(child_pipe, key_id, fpr,
1538
2311
self.client_address)
1539
2312
except KeyError:
1540
2313
return
1541
1542
if self.server.use_dbus:
1543
# Emit D-Bus signal
1544
client.NewRequest(str(self.client_address))
1545
2314
1546
2315
if client.approval_delay:
1547
2316
delay = client.approval_delay
1548
2317
client.approvals_pending += 1
1549
2318
approval_required = True
1550
2319
1551
2320
while True:
1552
2321
if not client.enabled:
1553
2322
logger.info("Client %s is disabled",
1554
client.name)
2323
client.name)
1555
2324
if self.server.use_dbus:
1556
2325
# Emit D-Bus signal
1557
2326
client.Rejected("Disabled")
1558
2327
return
1559
2328
1560
2329
if client.approved or not client.approval_delay:
1561
#We are approved or approval is disabled
2330
# We are approved or approval is disabled
1562
2331
break
1563
2332
elif client.approved is None:
1564
2333
logger.info("Client %s needs approval",
1566
2335
if self.server.use_dbus:
1567
2336
# Emit D-Bus signal
1568
2337
client.NeedApproval(
1569
client.approval_delay_milliseconds(),
1570
client.approved_by_default)
2338
client.approval_delay.total_seconds()
2339
* 1000, client.approved_by_default)
1571
2340
else:
1572
2341
logger.warning("Client %s was not approved",
1573
2342
client.name)
1575
2344
# Emit D-Bus signal
1576
2345
client.Rejected("Denied")
1577
2346
return
1578
1579
#wait until timeout or approved
2347
2348
# wait until timeout or approved
1580
2349
time = datetime.datetime.now()
1581
2350
client.changedstate.acquire()
1582
(client.changedstate.wait
1583
(float(client.timedelta_to_milliseconds(delay)
1584
/ 1000)))
2351
client.changedstate.wait(delay.total_seconds())
1585
2352
client.changedstate.release()
1586
2353
time2 = datetime.datetime.now()
1587
2354
if (time2 - time) >= delay:
1597
2364
break
1598
2365
else:
1599
2366
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
2367
2368
try:
2369
session.send(client.secret)
2370
except gnutls.Error as error:
2371
logger.warning("gnutls send failed",
2372
exc_info=error)
2373
return
2374
1613
2375
logger.info("Sending secret to %s", client.name)
1614
2376
# bump the timeout using extended_timeout
1615
client.checked_ok(client.extended_timeout)
2377
client.bump_timeout(client.extended_timeout)
1616
2378
if self.server.use_dbus:
1617
2379
# Emit D-Bus signal
1618
2380
client.GotSecret()
1619
2381
1620
2382
finally:
1621
2383
if approval_required:
1622
2384
client.approvals_pending -= 1
1623
2385
try:
1624
2386
session.bye()
1625
except gnutls.errors.GNUTLSError as error:
1626
logger.warning("GnuTLS bye failed")
1627
2387
except gnutls.Error as error:
2388
logger.warning("GnuTLS bye failed",
2389
exc_info=error)
2390
1628
2391
@staticmethod
1629
2392
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
2393
"Return the peer's certificate as a bytestring"
2394
try:
2395
cert_type = gnutls.certificate_type_get2(session._c_object,
2396
gnutls.CTYPE_PEERS)
2397
except AttributeError:
2398
cert_type = gnutls.certificate_type_get(session._c_object)
2399
if gnutls.has_rawpk:
2400
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2401
else:
2402
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2403
# If not a valid certificate type...
2404
if cert_type not in valid_cert_types:
2405
logger.info("Cert type %r not in %r", cert_type,
2406
valid_cert_types)
2407
# ...return invalid data
2408
return b""
1637
2409
list_size = ctypes.c_uint(1)
1638
cert_list = (gnutls.library.functions
1639
.gnutls_certificate_get_peers
2410
cert_list = (gnutls.certificate_get_peers
1640
2411
(session._c_object, ctypes.byref(list_size)))
1641
2412
if not bool(cert_list) and list_size.value != 0:
1642
raise gnutls.errors.GNUTLSError("error getting peer"
1643
" certificate")
2413
raise gnutls.Error("error getting peer certificate")
1644
2414
if list_size.value == 0:
1645
2415
return None
1646
2416
cert = cert_list[0]
1647
2417
return ctypes.string_at(cert.data, cert.size)
1648
2418
2419
@staticmethod
2420
def key_id(certificate):
2421
"Convert a certificate bytestring to a hexdigit key ID"
2422
# New GnuTLS "datum" with the public key
2423
datum = gnutls.datum_t(
2424
ctypes.cast(ctypes.c_char_p(certificate),
2425
ctypes.POINTER(ctypes.c_ubyte)),
2426
ctypes.c_uint(len(certificate)))
2427
# XXX all these need to be created in the gnutls "module"
2428
# New empty GnuTLS certificate
2429
pubkey = gnutls.pubkey_t()
2430
gnutls.pubkey_init(ctypes.byref(pubkey))
2431
# Import the raw public key into the certificate
2432
gnutls.pubkey_import(pubkey,
2433
ctypes.byref(datum),
2434
gnutls.X509_FMT_DER)
2435
# New buffer for the key ID
2436
buf = ctypes.create_string_buffer(32)
2437
buf_len = ctypes.c_size_t(len(buf))
2438
# Get the key ID from the raw public key into the buffer
2439
gnutls.pubkey_get_key_id(pubkey,
2440
gnutls.KEYID_USE_SHA256,
2441
ctypes.cast(ctypes.byref(buf),
2442
ctypes.POINTER(ctypes.c_ubyte)),
2443
ctypes.byref(buf_len))
2444
# Deinit the certificate
2445
gnutls.pubkey_deinit(pubkey)
2446
2447
# Convert the buffer to a Python bytestring
2448
key_id = ctypes.string_at(buf, buf_len.value)
2449
# Convert the bytestring to hexadecimal notation
2450
hex_key_id = binascii.hexlify(key_id).upper()
2451
return hex_key_id
2452
1649
2453
@staticmethod
1650
2454
def fingerprint(openpgp):
1651
2455
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1652
2456
# 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))))
2457
datum = gnutls.datum_t(
2458
ctypes.cast(ctypes.c_char_p(openpgp),
2459
ctypes.POINTER(ctypes.c_ubyte)),
2460
ctypes.c_uint(len(openpgp)))
1658
2461
# 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)))
2462
crt = gnutls.openpgp_crt_t()
2463
gnutls.openpgp_crt_init(ctypes.byref(crt))
1662
2464
# 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))
2465
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2466
gnutls.OPENPGP_FMT_RAW)
1667
2467
# Verify the self signature in the key
1668
2468
crtverify = ctypes.c_uint()
1669
(gnutls.library.functions
1670
.gnutls_openpgp_crt_verify_self(crt, 0,
1671
ctypes.byref(crtverify)))
2469
gnutls.openpgp_crt_verify_self(crt, 0,
2470
ctypes.byref(crtverify))
1672
2471
if crtverify.value != 0:
1673
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1674
raise (gnutls.errors.CertificateSecurityError
1675
("Verify failed"))
2472
gnutls.openpgp_crt_deinit(crt)
2473
raise gnutls.CertificateSecurityError(code
2474
=crtverify.value)
1676
2475
# New buffer for the fingerprint
1677
2476
buf = ctypes.create_string_buffer(20)
1678
2477
buf_len = ctypes.c_size_t()
1679
2478
# 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)))
2479
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2480
ctypes.byref(buf_len))
1683
2481
# Deinit the certificate
1684
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2482
gnutls.openpgp_crt_deinit(crt)
1685
2483
# Convert the buffer to a Python bytestring
1686
2484
fpr = ctypes.string_at(buf, buf_len.value)
1687
2485
# Convert the bytestring to hexadecimal notation
1691
2489
1692
2490
class MultiprocessingMixIn(object):
1693
2491
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2492
1694
2493
def sub_process_main(self, request, address):
1695
2494
try:
1696
2495
self.finish_request(request, address)
1697
2496
except Exception:
1698
2497
self.handle_error(request, address)
1699
2498
self.close_request(request)
1700
2499
1701
2500
def process_request(self, request, address):
1702
2501
"""Start a new process to process the request."""
1703
proc = multiprocessing.Process(target = self.sub_process_main,
1704
args = (request,
1705
address))
2502
proc = multiprocessing.Process(target=self.sub_process_main,
2503
args=(request, address))
1706
2504
proc.start()
1707
2505
return proc
1708
2506
1709
2507
1710
2508
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1711
2509
""" adds a pipe to the MixIn """
2510
1712
2511
def process_request(self, request, client_address):
1713
2512
"""Overrides and wraps the original process_request().
1714
2513
1715
2514
This function creates a new pipe in self.pipe
1716
2515
"""
1717
2516
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1718
2517
1719
2518
proc = MultiprocessingMixIn.process_request(self, request,
1720
2519
client_address)
1721
2520
self.child_pipe.close()
1722
2521
self.add_pipe(parent_pipe, proc)
1723
2522
1724
2523
def add_pipe(self, parent_pipe, proc):
1725
2524
"""Dummy function; override as necessary"""
1726
raise NotImplementedError
2525
raise NotImplementedError()
1727
2526
1728
2527
1729
2528
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1730
2529
socketserver.TCPServer, object):
1731
2530
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1732
2531
1733
2532
Attributes:
1734
2533
enabled: Boolean; whether this server is activated yet
1735
2534
interface: None or a network interface name (string)
1736
2535
use_ipv6: Boolean; to use IPv6 or not
1737
2536
"""
2537
1738
2538
def __init__(self, server_address, RequestHandlerClass,
1739
interface=None, use_ipv6=True):
2539
interface=None,
2540
use_ipv6=True,
2541
socketfd=None):
2542
"""If socketfd is set, use that file descriptor instead of
2543
creating a new one with socket.socket().
2544
"""
1740
2545
self.interface = interface
1741
2546
if use_ipv6:
1742
2547
self.address_family = socket.AF_INET6
2548
if socketfd is not None:
2549
# Save the file descriptor
2550
self.socketfd = socketfd
2551
# Save the original socket.socket() function
2552
self.socket_socket = socket.socket
2553
2554
# To implement --socket, we monkey patch socket.socket.
2555
#
2556
# (When socketserver.TCPServer is a new-style class, we
2557
# could make self.socket into a property instead of monkey
2558
# patching socket.socket.)
2559
#
2560
# Create a one-time-only replacement for socket.socket()
2561
@functools.wraps(socket.socket)
2562
def socket_wrapper(*args, **kwargs):
2563
# Restore original function so subsequent calls are
2564
# not affected.
2565
socket.socket = self.socket_socket
2566
del self.socket_socket
2567
# This time only, return a new socket object from the
2568
# saved file descriptor.
2569
return socket.fromfd(self.socketfd, *args, **kwargs)
2570
# Replace socket.socket() function with wrapper
2571
socket.socket = socket_wrapper
2572
# The socketserver.TCPServer.__init__ will call
2573
# socket.socket(), which might be our replacement,
2574
# socket_wrapper(), if socketfd was set.
1743
2575
socketserver.TCPServer.__init__(self, server_address,
1744
2576
RequestHandlerClass)
2577
1745
2578
def server_bind(self):
1746
2579
"""This overrides the normal server_bind() function
1747
2580
to bind to an interface if one was specified, and also NOT to
1748
2581
bind to an address or port if they were not specified."""
2582
global SO_BINDTODEVICE
1749
2583
if self.interface is not None:
1750
2584
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
2585
# Fall back to a hard-coded value which seems to be
2586
# common enough.
2587
logger.warning("SO_BINDTODEVICE not found, trying 25")
2588
SO_BINDTODEVICE = 25
2589
try:
2590
self.socket.setsockopt(
2591
socket.SOL_SOCKET, SO_BINDTODEVICE,
2592
(self.interface + "\0").encode("utf-8"))
2593
except socket.error as error:
2594
if error.errno == errno.EPERM:
2595
logger.error("No permission to bind to"
2596
" interface %s", self.interface)
2597
elif error.errno == errno.ENOPROTOOPT:
2598
logger.error("SO_BINDTODEVICE not available;"
2599
" cannot bind to interface %s",
2600
self.interface)
2601
elif error.errno == errno.ENODEV:
2602
logger.error("Interface %s does not exist,"
2603
" cannot bind", self.interface)
2604
else:
2605
raise
1771
2606
# Only bind(2) the socket if we really need to.
1772
2607
if self.server_address[0] or self.server_address[1]:
1773
2608
if not self.server_address[0]:
1774
2609
if self.address_family == socket.AF_INET6:
1775
any_address = "::" # in6addr_any
2610
any_address = "::" # in6addr_any
1776
2611
else:
1777
any_address = socket.INADDR_ANY
2612
any_address = "0.0.0.0" # INADDR_ANY
1778
2613
self.server_address = (any_address,
1779
2614
self.server_address[1])
1780
2615
elif not self.server_address[1]:
1781
self.server_address = (self.server_address[0],
1782
0)
2616
self.server_address = (self.server_address[0], 0)
1783
2617
# if self.interface:
1784
2618
# self.server_address = (self.server_address[0],
1785
2619
# 0, # port
1791
2625
1792
2626
class MandosServer(IPv6_TCPServer):
1793
2627
"""Mandos server.
1794
2628
1795
2629
Attributes:
1796
2630
clients: set of Client objects
1797
2631
gnutls_priority GnuTLS priority string
1798
2632
use_dbus: Boolean; to emit D-Bus signals or not
1799
1800
Assumes a gobject.MainLoop event loop.
2633
2634
Assumes a GLib.MainLoop event loop.
1801
2635
"""
2636
1802
2637
def __init__(self, server_address, RequestHandlerClass,
1803
interface=None, use_ipv6=True, clients=None,
1804
gnutls_priority=None, use_dbus=True):
2638
interface=None,
2639
use_ipv6=True,
2640
clients=None,
2641
gnutls_priority=None,
2642
use_dbus=True,
2643
socketfd=None):
1805
2644
self.enabled = False
1806
2645
self.clients = clients
1807
2646
if self.clients is None:
1810
2649
self.gnutls_priority = gnutls_priority
1811
2650
IPv6_TCPServer.__init__(self, server_address,
1812
2651
RequestHandlerClass,
1813
interface = interface,
1814
use_ipv6 = use_ipv6)
2652
interface=interface,
2653
use_ipv6=use_ipv6,
2654
socketfd=socketfd)
2655
1815
2656
def server_activate(self):
1816
2657
if self.enabled:
1817
2658
return socketserver.TCPServer.server_activate(self)
1818
2659
1819
2660
def enable(self):
1820
2661
self.enabled = True
1821
2662
1822
2663
def add_pipe(self, parent_pipe, proc):
1823
2664
# 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)
2665
GLib.io_add_watch(
2666
parent_pipe.fileno(),
2667
GLib.IO_IN | GLib.IO_HUP,
2668
functools.partial(self.handle_ipc,
2669
parent_pipe=parent_pipe,
2670
proc=proc))
2671
2672
def handle_ipc(self, source, condition,
2673
parent_pipe=None,
2674
proc=None,
2675
client_object=None):
1847
2676
# error, or the other end of multiprocessing.Pipe has closed
1848
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2677
if condition & (GLib.IO_ERR | GLib.IO_HUP):
1849
2678
# Wait for other process to exit
1850
2679
proc.join()
1851
2680
return False
1852
2681
1853
2682
# Read a request from the child
1854
2683
request = parent_pipe.recv()
1855
2684
command = request[0]
1856
2685
1857
2686
if command == 'init':
1858
fpr = request[1]
1859
address = request[2]
1860
1861
for c in self.clients.itervalues():
1862
if c.fingerprint == fpr:
2687
key_id = request[1].decode("ascii")
2688
fpr = request[2].decode("ascii")
2689
address = request[3]
2690
2691
for c in self.clients.values():
2692
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2693
continue
2694
if key_id and c.key_id == key_id:
2695
client = c
2696
break
2697
if fpr and c.fingerprint == fpr:
1863
2698
client = c
1864
2699
break
1865
2700
else:
1866
logger.info("Client not found for fingerprint: %s, ad"
1867
"dress: %s", fpr, address)
2701
logger.info("Client not found for key ID: %s, address"
2702
": %s", key_id or fpr, address)
1868
2703
if self.use_dbus:
1869
2704
# Emit D-Bus signal
1870
mandos_dbus_service.ClientNotFound(fpr,
2705
mandos_dbus_service.ClientNotFound(key_id or fpr,
1871
2706
address[0])
1872
2707
parent_pipe.send(False)
1873
2708
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))
2709
2710
GLib.io_add_watch(
2711
parent_pipe.fileno(),
2712
GLib.IO_IN | GLib.IO_HUP,
2713
functools.partial(self.handle_ipc,
2714
parent_pipe=parent_pipe,
2715
proc=proc,
2716
client_object=client))
1883
2717
parent_pipe.send(True)
1884
2718
# remove the old hook in favor of the new above hook on
1885
2719
# same fileno
1888
2722
funcname = request[1]
1889
2723
args = request[2]
1890
2724
kwargs = request[3]
1891
2725
1892
2726
parent_pipe.send(('data', getattr(client_object,
1893
2727
funcname)(*args,
1894
**kwargs)))
1895
2728
**kwargs)))
2729
1896
2730
if command == 'getattr':
1897
2731
attrname = request[1]
1898
if callable(client_object.__getattribute__(attrname)):
1899
parent_pipe.send(('function',))
2732
if isinstance(client_object.__getattribute__(attrname),
2733
collections.Callable):
2734
parent_pipe.send(('function', ))
1900
2735
else:
1901
parent_pipe.send(('data', client_object
1902
.__getattribute__(attrname)))
1903
2736
parent_pipe.send((
2737
'data', client_object.__getattribute__(attrname)))
2738
1904
2739
if command == 'setattr':
1905
2740
attrname = request[1]
1906
2741
value = request[2]
1907
2742
setattr(client_object, attrname, value)
1908
2743
1909
2744
return True
1910
2745
1911
2746
2747
def rfc3339_duration_to_delta(duration):
2748
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2749
2750
>>> rfc3339_duration_to_delta("P7D")
2751
datetime.timedelta(7)
2752
>>> rfc3339_duration_to_delta("PT60S")
2753
datetime.timedelta(0, 60)
2754
>>> rfc3339_duration_to_delta("PT60M")
2755
datetime.timedelta(0, 3600)
2756
>>> rfc3339_duration_to_delta("PT24H")
2757
datetime.timedelta(1)
2758
>>> rfc3339_duration_to_delta("P1W")
2759
datetime.timedelta(7)
2760
>>> rfc3339_duration_to_delta("PT5M30S")
2761
datetime.timedelta(0, 330)
2762
>>> rfc3339_duration_to_delta("P1DT3M20S")
2763
datetime.timedelta(1, 200)
2764
"""
2765
2766
# Parsing an RFC 3339 duration with regular expressions is not
2767
# possible - there would have to be multiple places for the same
2768
# values, like seconds. The current code, while more esoteric, is
2769
# cleaner without depending on a parsing library. If Python had a
2770
# built-in library for parsing we would use it, but we'd like to
2771
# avoid excessive use of external libraries.
2772
2773
# New type for defining tokens, syntax, and semantics all-in-one
2774
Token = collections.namedtuple("Token", (
2775
"regexp", # To match token; if "value" is not None, must have
2776
# a "group" containing digits
2777
"value", # datetime.timedelta or None
2778
"followers")) # Tokens valid after this token
2779
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2780
# the "duration" ABNF definition in RFC 3339, Appendix A.
2781
token_end = Token(re.compile(r"$"), None, frozenset())
2782
token_second = Token(re.compile(r"(\d+)S"),
2783
datetime.timedelta(seconds=1),
2784
frozenset((token_end, )))
2785
token_minute = Token(re.compile(r"(\d+)M"),
2786
datetime.timedelta(minutes=1),
2787
frozenset((token_second, token_end)))
2788
token_hour = Token(re.compile(r"(\d+)H"),
2789
datetime.timedelta(hours=1),
2790
frozenset((token_minute, token_end)))
2791
token_time = Token(re.compile(r"T"),
2792
None,
2793
frozenset((token_hour, token_minute,
2794
token_second)))
2795
token_day = Token(re.compile(r"(\d+)D"),
2796
datetime.timedelta(days=1),
2797
frozenset((token_time, token_end)))
2798
token_month = Token(re.compile(r"(\d+)M"),
2799
datetime.timedelta(weeks=4),
2800
frozenset((token_day, token_end)))
2801
token_year = Token(re.compile(r"(\d+)Y"),
2802
datetime.timedelta(weeks=52),
2803
frozenset((token_month, token_end)))
2804
token_week = Token(re.compile(r"(\d+)W"),
2805
datetime.timedelta(weeks=1),
2806
frozenset((token_end, )))
2807
token_duration = Token(re.compile(r"P"), None,
2808
frozenset((token_year, token_month,
2809
token_day, token_time,
2810
token_week)))
2811
# Define starting values:
2812
# Value so far
2813
value = datetime.timedelta()
2814
found_token = None
2815
# Following valid tokens
2816
followers = frozenset((token_duration, ))
2817
# String left to parse
2818
s = duration
2819
# Loop until end token is found
2820
while found_token is not token_end:
2821
# Search for any currently valid tokens
2822
for token in followers:
2823
match = token.regexp.match(s)
2824
if match is not None:
2825
# Token found
2826
if token.value is not None:
2827
# Value found, parse digits
2828
factor = int(match.group(1), 10)
2829
# Add to value so far
2830
value += factor * token.value
2831
# Strip token from string
2832
s = token.regexp.sub("", s, 1)
2833
# Go to found token
2834
found_token = token
2835
# Set valid next tokens
2836
followers = found_token.followers
2837
break
2838
else:
2839
# No currently valid tokens were found
2840
raise ValueError("Invalid RFC 3339 duration: {!r}"
2841
.format(duration))
2842
# End token found
2843
return value
2844
2845
1912
2846
def string_to_delta(interval):
1913
2847
"""Parse a string and return a datetime.timedelta
1914
2848
1915
2849
>>> string_to_delta('7d')
1916
2850
datetime.timedelta(7)
1917
2851
>>> string_to_delta('60s')
1925
2859
>>> string_to_delta('5m 30s')
1926
2860
datetime.timedelta(0, 330)
1927
2861
"""
2862
2863
try:
2864
return rfc3339_duration_to_delta(interval)
2865
except ValueError:
2866
pass
2867
1928
2868
timevalue = datetime.timedelta(0)
1929
2869
for s in interval.split():
1930
2870
try:
1931
suffix = unicode(s[-1])
2871
suffix = s[-1]
1932
2872
value = int(s[:-1])
1933
2873
if suffix == "d":
1934
2874
delta = datetime.timedelta(value)
1941
2881
elif suffix == "w":
1942
2882
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1943
2883
else:
1944
raise ValueError("Unknown suffix %r" % suffix)
1945
except (ValueError, IndexError) as e:
2884
raise ValueError("Unknown suffix {!r}".format(suffix))
2885
except IndexError as e:
1946
2886
raise ValueError(*(e.args))
1947
2887
timevalue += delta
1948
2888
return timevalue
1949
2889
1950
2890
1951
def daemon(nochdir = False, noclose = False):
2891
def daemon(nochdir=False, noclose=False):
1952
2892
"""See daemon(3). Standard BSD Unix function.
1953
2893
1954
2894
This should really exist as os.daemon, but it doesn't (yet)."""
1955
2895
if os.fork():
1956
2896
sys.exit()
1961
2901
sys.exit()
1962
2902
if not noclose:
1963
2903
# Close all standard open file descriptors
1964
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2904
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1965
2905
if not stat.S_ISCHR(os.fstat(null).st_mode):
1966
2906
raise OSError(errno.ENODEV,
1967
"%s not a character device"
1968
% os.path.devnull)
2907
"{} not a character device"
2908
.format(os.devnull))
1969
2909
os.dup2(null, sys.stdin.fileno())
1970
2910
os.dup2(null, sys.stdout.fileno())
1971
2911
os.dup2(null, sys.stderr.fileno())
1974
2914
1975
2915
1976
2916
def main():
1977
2917
1978
2918
##################################################################
1979
2919
# Parsing of options, both command line and config file
1980
2920
1981
2921
parser = argparse.ArgumentParser()
1982
2922
parser.add_argument("-v", "--version", action="version",
1983
version = "%%(prog)s %s" % version,
2923
version="%(prog)s {}".format(version),
1984
2924
help="show version number and exit")
1985
2925
parser.add_argument("-i", "--interface", metavar="IF",
1986
2926
help="Bind to interface IF")
1992
2932
help="Run self-test")
1993
2933
parser.add_argument("--debug", action="store_true",
1994
2934
help="Debug mode; run in foreground and log"
1995
" to terminal")
2935
" to terminal", default=None)
1996
2936
parser.add_argument("--debuglevel", metavar="LEVEL",
1997
2937
help="Debug level for stdout output")
1998
2938
parser.add_argument("--priority", help="GnuTLS"
2005
2945
" files")
2006
2946
parser.add_argument("--no-dbus", action="store_false",
2007
2947
dest="use_dbus", help="Do not provide D-Bus"
2008
" system bus interface")
2948
" system bus interface", default=None)
2009
2949
parser.add_argument("--no-ipv6", action="store_false",
2010
dest="use_ipv6", help="Do not use IPv6")
2950
dest="use_ipv6", help="Do not use IPv6",
2951
default=None)
2011
2952
parser.add_argument("--no-restore", action="store_false",
2012
2953
dest="restore", help="Do not restore stored"
2013
" state")
2954
" state", default=None)
2955
parser.add_argument("--socket", type=int,
2956
help="Specify a file descriptor to a network"
2957
" socket to use instead of creating one")
2014
2958
parser.add_argument("--statedir", metavar="DIR",
2015
2959
help="Directory to save/restore state in")
2016
2960
parser.add_argument("--foreground", action="store_true",
2961
help="Run in foreground", default=None)
2962
parser.add_argument("--no-zeroconf", action="store_false",
2963
dest="zeroconf", help="Do not use Zeroconf",
2964
default=None)
2965
2017
2966
options = parser.parse_args()
2018
2967
2019
2968
if options.check:
2020
2969
import doctest
2021
doctest.testmod()
2022
sys.exit()
2023
2970
fail_count, test_count = doctest.testmod()
2971
sys.exit(os.EX_OK if fail_count == 0 else 1)
2972
2024
2973
# 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
2974
if gnutls.has_rawpk:
2975
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2976
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2977
else:
2978
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2979
":+SIGN-DSA-SHA256")
2980
server_defaults = {"interface": "",
2981
"address": "",
2982
"port": "",
2983
"debug": "False",
2984
"priority": priority,
2985
"servicename": "Mandos",
2986
"use_dbus": "True",
2987
"use_ipv6": "True",
2988
"debuglevel": "",
2989
"restore": "True",
2990
"socket": "",
2991
"statedir": "/var/lib/mandos",
2992
"foreground": "False",
2993
"zeroconf": "True",
2994
}
2995
del priority
2996
2039
2997
# Parse config file for server-global settings
2040
2998
server_config = configparser.SafeConfigParser(server_defaults)
2041
2999
del server_defaults
2042
server_config.read(os.path.join(options.configdir,
2043
"mandos.conf"))
3000
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2044
3001
# Convert the SafeConfigParser object to a dict
2045
3002
server_settings = server_config.defaults()
2046
3003
# Use the appropriate methods on the non-string config options
2047
for option in ("debug", "use_dbus", "use_ipv6"):
3004
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3005
"foreground", "zeroconf"):
2048
3006
server_settings[option] = server_config.getboolean("DEFAULT",
2049
3007
option)
2050
3008
if server_settings["port"]:
2051
3009
server_settings["port"] = server_config.getint("DEFAULT",
2052
3010
"port")
3011
if server_settings["socket"]:
3012
server_settings["socket"] = server_config.getint("DEFAULT",
3013
"socket")
3014
# Later, stdin will, and stdout and stderr might, be dup'ed
3015
# over with an opened os.devnull. But we don't want this to
3016
# happen with a supplied network socket.
3017
if 0 <= server_settings["socket"] <= 2:
3018
server_settings["socket"] = os.dup(server_settings
3019
["socket"])
2053
3020
del server_config
2054
3021
2055
3022
# Override the settings from the config file with command line
2056
3023
# options, if set.
2057
3024
for option in ("interface", "address", "port", "debug",
2058
"priority", "servicename", "configdir",
2059
"use_dbus", "use_ipv6", "debuglevel", "restore",
2060
"statedir"):
3025
"priority", "servicename", "configdir", "use_dbus",
3026
"use_ipv6", "debuglevel", "restore", "statedir",
3027
"socket", "foreground", "zeroconf"):
2061
3028
value = getattr(options, option)
2062
3029
if value is not None:
2063
3030
server_settings[option] = value
2064
3031
del options
2065
3032
# Force all strings to be unicode
2066
3033
for option in server_settings.keys():
2067
if type(server_settings[option]) is str:
2068
server_settings[option] = unicode(server_settings[option])
3034
if isinstance(server_settings[option], bytes):
3035
server_settings[option] = (server_settings[option]
3036
.decode("utf-8"))
3037
# Force all boolean options to be boolean
3038
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3039
"foreground", "zeroconf"):
3040
server_settings[option] = bool(server_settings[option])
3041
# Debug implies foreground
3042
if server_settings["debug"]:
3043
server_settings["foreground"] = True
2069
3044
# Now we have our good server settings in "server_settings"
2070
3045
2071
3046
##################################################################
2072
3047
3048
if (not server_settings["zeroconf"]
3049
and not (server_settings["port"]
3050
or server_settings["socket"] != "")):
3051
parser.error("Needs port or socket to work without Zeroconf")
3052
2073
3053
# For convenience
2074
3054
debug = server_settings["debug"]
2075
3055
debuglevel = server_settings["debuglevel"]
2077
3057
use_ipv6 = server_settings["use_ipv6"]
2078
3058
stored_state_path = os.path.join(server_settings["statedir"],
2079
3059
stored_state_file)
2080
3060
foreground = server_settings["foreground"]
3061
zeroconf = server_settings["zeroconf"]
3062
2081
3063
if debug:
2082
3064
initlogger(debug, logging.DEBUG)
2083
3065
else:
2086
3068
else:
2087
3069
level = getattr(logging, debuglevel.upper())
2088
3070
initlogger(debug, level)
2089
3071
2090
3072
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
3073
syslogger.setFormatter(
3074
logging.Formatter('Mandos ({}) [%(process)d]:'
3075
' %(levelname)s: %(message)s'.format(
3076
server_settings["servicename"])))
3077
2096
3078
# Parse config file with clients
2097
client_config = configparser.SafeConfigParser(Client.client_defaults)
3079
client_config = configparser.SafeConfigParser(Client
3080
.client_defaults)
2098
3081
client_config.read(os.path.join(server_settings["configdir"],
2099
3082
"clients.conf"))
2100
3083
2101
3084
global mandos_dbus_service
2102
3085
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
3086
3087
socketfd = None
3088
if server_settings["socket"] != "":
3089
socketfd = server_settings["socket"]
3090
tcp_server = MandosServer(
3091
(server_settings["address"], server_settings["port"]),
3092
ClientHandler,
3093
interface=(server_settings["interface"] or None),
3094
use_ipv6=use_ipv6,
3095
gnutls_priority=server_settings["priority"],
3096
use_dbus=use_dbus,
3097
socketfd=socketfd)
3098
if not foreground:
3099
pidfilename = "/run/mandos.pid"
3100
if not os.path.isdir("/run/."):
3101
pidfilename = "/var/run/mandos.pid"
3102
pidfile = None
3103
try:
3104
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3105
except IOError as e:
3106
logger.error("Could not open file %r", pidfilename,
3107
exc_info=e)
3108
3109
for name, group in (("_mandos", "_mandos"),
3110
("mandos", "mandos"),
3111
("nobody", "nogroup")):
3112
try:
3113
uid = pwd.getpwnam(name).pw_uid
3114
gid = pwd.getpwnam(group).pw_gid
3115
break
2127
3116
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
3117
continue
3118
else:
3119
uid = 65534
3120
gid = 65534
2134
3121
try:
2135
3122
os.setgid(gid)
2136
3123
os.setuid(uid)
3124
if debug:
3125
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3126
gid))
2137
3127
except OSError as error:
2138
if error[0] != errno.EPERM:
2139
raise error
2140
3128
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3129
.format(uid, gid, os.strerror(error.errno)))
3130
if error.errno != errno.EPERM:
3131
raise
3132
2141
3133
if debug:
2142
3134
# Enable all possible GnuTLS debugging
2143
3135
2144
3136
# "Use a log level over 10 to enable all debugging options."
2145
3137
# - GnuTLS manual
2146
gnutls.library.functions.gnutls_global_set_log_level(11)
2147
2148
@gnutls.library.types.gnutls_log_func
3138
gnutls.global_set_log_level(11)
3139
3140
@gnutls.log_func
2149
3141
def debug_gnutls(level, string):
2150
3142
logger.debug("GnuTLS: %s", string[:-1])
2151
2152
(gnutls.library.functions
2153
.gnutls_global_set_log_function(debug_gnutls))
2154
3143
3144
gnutls.global_set_log_function(debug_gnutls)
3145
2155
3146
# Redirect stdin so all checkers get /dev/null
2156
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3147
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2157
3148
os.dup2(null, sys.stdin.fileno())
2158
3149
if null > 2:
2159
3150
os.close(null)
2160
3151
2161
3152
# Need to fork before connecting to D-Bus
2162
if not debug:
3153
if not foreground:
2163
3154
# Close all input and output, do double fork, etc.
2164
3155
daemon()
2165
2166
gobject.threads_init()
2167
3156
3157
# multiprocessing will use threads, so before we use GLib we need
3158
# to inform GLib that threads will be used.
3159
GLib.threads_init()
3160
2168
3161
global main_loop
2169
3162
# From the Avahi example code
2170
DBusGMainLoop(set_as_default=True )
2171
main_loop = gobject.MainLoop()
3163
DBusGMainLoop(set_as_default=True)
3164
main_loop = GLib.MainLoop()
2172
3165
bus = dbus.SystemBus()
2173
3166
# End of Avahi example code
2174
3167
if use_dbus:
2175
3168
try:
2176
3169
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")
3170
bus,
3171
do_not_queue=True)
3172
old_bus_name = dbus.service.BusName(
3173
"se.bsnet.fukt.Mandos", bus,
3174
do_not_queue=True)
3175
except dbus.exceptions.DBusException as e:
3176
logger.error("Disabling D-Bus:", exc_info=e)
2183
3177
use_dbus = False
2184
3178
server_settings["use_dbus"] = False
2185
3179
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
3180
if zeroconf:
3181
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3182
service = AvahiServiceToSyslog(
3183
name=server_settings["servicename"],
3184
servicetype="_mandos._tcp",
3185
protocol=protocol,
3186
bus=bus)
3187
if server_settings["interface"]:
3188
service.interface = if_nametoindex(
3189
server_settings["interface"].encode("utf-8"))
3190
2195
3191
global multiprocessing_manager
2196
3192
multiprocessing_manager = multiprocessing.Manager()
2197
3193
2198
3194
client_class = Client
2199
3195
if use_dbus:
2200
client_class = functools.partial(ClientDBusTransitional,
2201
bus = bus)
2202
3196
client_class = functools.partial(ClientDBus, bus=bus)
3197
2203
3198
client_settings = Client.config_parser(client_config)
2204
3199
old_client_settings = {}
2205
3200
clients_data = {}
2206
3201
3202
# This is used to redirect stdout and stderr for checker processes
3203
global wnull
3204
wnull = open(os.devnull, "w") # A writable /dev/null
3205
# Only used if server is running in foreground but not in debug
3206
# mode
3207
if debug or not foreground:
3208
wnull.close()
3209
2207
3210
# Get client data and settings from last running state.
2208
3211
if server_settings["restore"]:
2209
3212
try:
2210
3213
with open(stored_state_path, "rb") as stored_state:
2211
clients_data, old_client_settings = (pickle.load
2212
(stored_state))
3214
if sys.version_info.major == 2:
3215
clients_data, old_client_settings = pickle.load(
3216
stored_state)
3217
else:
3218
bytes_clients_data, bytes_old_client_settings = (
3219
pickle.load(stored_state, encoding="bytes"))
3220
# Fix bytes to strings
3221
# clients_data
3222
# .keys()
3223
clients_data = {(key.decode("utf-8")
3224
if isinstance(key, bytes)
3225
else key): value
3226
for key, value in
3227
bytes_clients_data.items()}
3228
del bytes_clients_data
3229
for key in clients_data:
3230
value = {(k.decode("utf-8")
3231
if isinstance(k, bytes) else k): v
3232
for k, v in
3233
clients_data[key].items()}
3234
clients_data[key] = value
3235
# .client_structure
3236
value["client_structure"] = [
3237
(s.decode("utf-8")
3238
if isinstance(s, bytes)
3239
else s) for s in
3240
value["client_structure"]]
3241
# .name & .host
3242
for k in ("name", "host"):
3243
if isinstance(value[k], bytes):
3244
value[k] = value[k].decode("utf-8")
3245
if not value.has_key("key_id"):
3246
value["key_id"] = ""
3247
elif not value.has_key("fingerprint"):
3248
value["fingerprint"] = ""
3249
# old_client_settings
3250
# .keys()
3251
old_client_settings = {
3252
(key.decode("utf-8")
3253
if isinstance(key, bytes)
3254
else key): value
3255
for key, value in
3256
bytes_old_client_settings.items()}
3257
del bytes_old_client_settings
3258
# .host
3259
for value in old_client_settings.values():
3260
if isinstance(value["host"], bytes):
3261
value["host"] = (value["host"]
3262
.decode("utf-8"))
2213
3263
os.remove(stored_state_path)
2214
3264
except IOError as e:
2215
logger.warning("Could not load persistent state: {0}"
2216
.format(e))
2217
if e.errno != errno.ENOENT:
3265
if e.errno == errno.ENOENT:
3266
logger.warning("Could not load persistent state:"
3267
" {}".format(os.strerror(e.errno)))
3268
else:
3269
logger.critical("Could not load persistent state:",
3270
exc_info=e)
2218
3271
raise
2219
3272
except EOFError as e:
2220
3273
logger.warning("Could not load persistent state: "
2221
"EOFError: {0}".format(e))
2222
3274
"EOFError:",
3275
exc_info=e)
3276
2223
3277
with PGPEngine() as pgp:
2224
for client_name, client in clients_data.iteritems():
3278
for client_name, client in clients_data.items():
3279
# Skip removed clients
3280
if client_name not in client_settings:
3281
continue
3282
2225
3283
# Decide which value to use after restoring saved state.
2226
3284
# We have three different values: Old config file,
2227
3285
# new config file, and saved state.
2232
3290
# For each value in new config, check if it
2233
3291
# differs from the old config value (Except for
2234
3292
# the "secret" attribute)
2235
if (name != "secret" and
2236
value != old_client_settings[client_name]
2237
[name]):
3293
if (name != "secret"
3294
and (value !=
3295
old_client_settings[client_name][name])):
2238
3296
client[name] = value
2239
3297
except KeyError:
2240
3298
pass
2241
3299
2242
3300
# 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.
3301
# enabled if its last checker was successful. A Client
3302
# whose checker succeeded before we stored its state is
3303
# assumed to have successfully run all checkers during
3304
# downtime.
2246
3305
if client["enabled"]:
2247
3306
if datetime.datetime.utcnow() >= client["expires"]:
2248
3307
if not client["last_checked_ok"]:
2249
3308
logger.warning(
2250
"disabling client {0} - Client never "
2251
"performed a successfull checker"
2252
.format(client["name"]))
3309
"disabling client {} - Client never "
3310
"performed a successful checker".format(
3311
client_name))
2253
3312
client["enabled"] = False
2254
3313
elif client["last_checker_status"] != 0:
2255
3314
logger.warning(
2256
"disabling client {0} - Client "
2257
"last checker failed with error code {1}"
2258
.format(client["name"],
2259
client["last_checker_status"]))
3315
"disabling client {} - Client last"
3316
" checker failed with error code"
3317
" {}".format(
3318
client_name,
3319
client["last_checker_status"]))
2260
3320
client["enabled"] = False
2261
3321
else:
2262
client["expires"] = (datetime.datetime
2263
.utcnow()
2264
+ client["timeout"])
2265
3322
client["expires"] = (
3323
datetime.datetime.utcnow()
3324
+ client["timeout"])
3325
logger.debug("Last checker succeeded,"
3326
" keeping {} enabled".format(
3327
client_name))
2266
3328
try:
2267
client["secret"] = (
2268
pgp.decrypt(client["encrypted_secret"],
2269
client_settings[client_name]
2270
["secret"]))
3329
client["secret"] = pgp.decrypt(
3330
client["encrypted_secret"],
3331
client_settings[client_name]["secret"])
2271
3332
except PGPError:
2272
3333
# 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"])
3334
logger.debug("Failed to decrypt {} old secret".format(
3335
client_name))
3336
client["secret"] = (client_settings[client_name]
3337
["secret"])
2277
3338
2278
2279
3339
# Add/remove clients based on new changes made to config
2280
for client_name in set(old_client_settings) - set(client_settings):
3340
for client_name in (set(old_client_settings)
3341
- set(client_settings)):
2281
3342
del clients_data[client_name]
2282
for client_name in set(client_settings) - set(old_client_settings):
3343
for client_name in (set(client_settings)
3344
- set(old_client_settings)):
2283
3345
clients_data[client_name] = client_settings[client_name]
2284
3346
2285
# Create clients all clients
2286
for client_name, client in clients_data.iteritems():
3347
# Create all client objects
3348
for client_name, client in clients_data.items():
2287
3349
tcp_server.clients[client_name] = client_class(
2288
name = client_name, settings = client)
2289
3350
name=client_name,
3351
settings=client,
3352
server_settings=server_settings)
3353
2290
3354
if not tcp_server.clients:
2291
3355
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
3356
3357
if not foreground:
3358
if pidfile is not None:
3359
pid = os.getpid()
3360
try:
3361
with pidfile:
3362
print(pid, file=pidfile)
3363
except IOError:
3364
logger.error("Could not write to file %r with PID %d",
3365
pidfilename, pid)
3366
del pidfile
2305
3367
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
3368
3369
for termsig in (signal.SIGHUP, signal.SIGTERM):
3370
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3371
lambda: main_loop.quit() and False)
3372
2311
3373
if use_dbus:
2312
class MandosDBusService(dbus.service.Object):
3374
3375
@alternate_dbus_interfaces(
3376
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3377
class MandosDBusService(DBusObjectWithObjectManager):
2313
3378
"""A D-Bus proxy object"""
3379
2314
3380
def __init__(self):
2315
3381
dbus.service.Object.__init__(self, bus, "/")
3382
2316
3383
_interface = "se.recompile.Mandos"
2317
3384
2318
3385
@dbus.service.signal(_interface, signature="o")
2319
3386
def ClientAdded(self, objpath):
2320
3387
"D-Bus signal"
2321
3388
pass
2322
3389
2323
3390
@dbus.service.signal(_interface, signature="ss")
2324
def ClientNotFound(self, fingerprint, address):
3391
def ClientNotFound(self, key_id, address):
2325
3392
"D-Bus signal"
2326
3393
pass
2327
3394
3395
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3396
"true"})
2328
3397
@dbus.service.signal(_interface, signature="os")
2329
3398
def ClientRemoved(self, objpath, name):
2330
3399
"D-Bus signal"
2331
3400
pass
2332
3401
3402
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3403
"true"})
2333
3404
@dbus.service.method(_interface, out_signature="ao")
2334
3405
def GetAllClients(self):
2335
3406
"D-Bus method"
2336
return dbus.Array(c.dbus_object_path
2337
for c in
2338
tcp_server.clients.itervalues())
2339
3407
return dbus.Array(c.dbus_object_path for c in
3408
tcp_server.clients.values())
3409
3410
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3411
"true"})
2340
3412
@dbus.service.method(_interface,
2341
3413
out_signature="a{oa{sv}}")
2342
3414
def GetAllClientsWithProperties(self):
2343
3415
"D-Bus method"
2344
3416
return dbus.Dictionary(
2345
((c.dbus_object_path, c.GetAll(""))
2346
for c in tcp_server.clients.itervalues()),
3417
{c.dbus_object_path: c.GetAll(
3418
"se.recompile.Mandos.Client")
3419
for c in tcp_server.clients.values()},
2347
3420
signature="oa{sv}")
2348
3421
2349
3422
@dbus.service.method(_interface, in_signature="o")
2350
3423
def RemoveClient(self, object_path):
2351
3424
"D-Bus method"
2352
for c in tcp_server.clients.itervalues():
3425
for c in tcp_server.clients.values():
2353
3426
if c.dbus_object_path == object_path:
2354
3427
del tcp_server.clients[c.name]
2355
3428
c.remove_from_connection()
2356
# Don't signal anything except ClientRemoved
3429
# Don't signal the disabling
2357
3430
c.disable(quiet=True)
2358
# Emit D-Bus signal
2359
self.ClientRemoved(object_path, c.name)
3431
# Emit D-Bus signal for removal
3432
self.client_removed_signal(c)
2360
3433
return
2361
3434
raise KeyError(object_path)
2362
3435
2363
3436
del _interface
2364
2365
class MandosDBusServiceTransitional(MandosDBusService):
2366
__metaclass__ = AlternateDBusNamesMetaclass
2367
mandos_dbus_service = MandosDBusServiceTransitional()
2368
3437
3438
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3439
out_signature="a{oa{sa{sv}}}")
3440
def GetManagedObjects(self):
3441
"""D-Bus method"""
3442
return dbus.Dictionary(
3443
{client.dbus_object_path:
3444
dbus.Dictionary(
3445
{interface: client.GetAll(interface)
3446
for interface in
3447
client._get_all_interface_names()})
3448
for client in tcp_server.clients.values()})
3449
3450
def client_added_signal(self, client):
3451
"""Send the new standard signal and the old signal"""
3452
if use_dbus:
3453
# New standard signal
3454
self.InterfacesAdded(
3455
client.dbus_object_path,
3456
dbus.Dictionary(
3457
{interface: client.GetAll(interface)
3458
for interface in
3459
client._get_all_interface_names()}))
3460
# Old signal
3461
self.ClientAdded(client.dbus_object_path)
3462
3463
def client_removed_signal(self, client):
3464
"""Send the new standard signal and the old signal"""
3465
if use_dbus:
3466
# New standard signal
3467
self.InterfacesRemoved(
3468
client.dbus_object_path,
3469
client._get_all_interface_names())
3470
# Old signal
3471
self.ClientRemoved(client.dbus_object_path,
3472
client.name)
3473
3474
mandos_dbus_service = MandosDBusService()
3475
3476
# Save modules to variables to exempt the modules from being
3477
# unloaded before the function registered with atexit() is run.
3478
mp = multiprocessing
3479
wn = wnull
3480
2369
3481
def cleanup():
2370
3482
"Cleanup function; run on exit"
2371
service.cleanup()
2372
2373
multiprocessing.active_children()
3483
if zeroconf:
3484
service.cleanup()
3485
3486
mp.active_children()
3487
wn.close()
2374
3488
if not (tcp_server.clients or client_settings):
2375
3489
return
2376
3490
2377
3491
# Store client before exiting. Secrets are encrypted with key
2378
3492
# based on what config file has. If config file is
2379
3493
# removed/edited, old secret will thus be unrecovable.
2380
3494
clients = {}
2381
3495
with PGPEngine() as pgp:
2382
for client in tcp_server.clients.itervalues():
3496
for client in tcp_server.clients.values():
2383
3497
key = client_settings[client.name]["secret"]
2384
3498
client.encrypted_secret = pgp.encrypt(client.secret,
2385
3499
key)
2386
3500
client_dict = {}
2387
3501
2388
3502
# A list of attributes that can not be pickled
2389
3503
# + secret.
2390
exclude = set(("bus", "changedstate", "secret",
2391
"checker"))
2392
for name, typ in (inspect.getmembers
2393
(dbus.service.Object)):
3504
exclude = {"bus", "changedstate", "secret",
3505
"checker", "server_settings"}
3506
for name, typ in inspect.getmembers(dbus.service
3507
.Object):
2394
3508
exclude.add(name)
2395
3509
2396
3510
client_dict["encrypted_secret"] = (client
2397
3511
.encrypted_secret)
2398
3512
for attr in client.client_structure:
2399
3513
if attr not in exclude:
2400
3514
client_dict[attr] = getattr(client, attr)
2401
3515
2402
3516
clients[client.name] = client_dict
2403
3517
del client_settings[client.name]["secret"]
2404
3518
2405
3519
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)
3520
with tempfile.NamedTemporaryFile(
3521
mode='wb',
3522
suffix=".pickle",
3523
prefix='clients-',
3524
dir=os.path.dirname(stored_state_path),
3525
delete=False) as stored_state:
3526
pickle.dump((clients, client_settings), stored_state,
3527
protocol=2)
3528
tempname = stored_state.name
2412
3529
os.rename(tempname, stored_state_path)
2413
3530
except (IOError, OSError) as e:
2414
logger.warning("Could not save persistent state: {0}"
2415
.format(e))
2416
3531
if not debug:
2417
3532
try:
2418
3533
os.remove(tempname)
2419
3534
except NameError:
2420
3535
pass
2421
if e.errno not in set((errno.ENOENT, errno.EACCES,
2422
errno.EEXIST)):
2423
raise e
2424
3536
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3537
logger.warning("Could not save persistent state: {}"
3538
.format(os.strerror(e.errno)))
3539
else:
3540
logger.warning("Could not save persistent state:",
3541
exc_info=e)
3542
raise
3543
2425
3544
# Delete all clients, and settings from config
2426
3545
while tcp_server.clients:
2427
3546
name, client = tcp_server.clients.popitem()
2428
3547
if use_dbus:
2429
3548
client.remove_from_connection()
2430
# Don't signal anything except ClientRemoved
3549
# Don't signal the disabling
2431
3550
client.disable(quiet=True)
3551
# Emit D-Bus signal for removal
2432
3552
if use_dbus:
2433
# Emit D-Bus signal
2434
mandos_dbus_service.ClientRemoved(client
2435
.dbus_object_path,
2436
client.name)
3553
mandos_dbus_service.client_removed_signal(client)
2437
3554
client_settings.clear()
2438
3555
2439
3556
atexit.register(cleanup)
2440
2441
for client in tcp_server.clients.itervalues():
3557
3558
for client in tcp_server.clients.values():
2442
3559
if use_dbus:
2443
# Emit D-Bus signal
2444
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3560
# Emit D-Bus signal for adding
3561
mandos_dbus_service.client_added_signal(client)
2445
3562
# Need to initiate checking of clients
2446
3563
if client.enabled:
2447
3564
client.init_checker()
2448
3565
2449
3566
tcp_server.enable()
2450
3567
tcp_server.server_activate()
2451
3568
2452
3569
# Find out what port we got
2453
service.port = tcp_server.socket.getsockname()[1]
3570
if zeroconf:
3571
service.port = tcp_server.socket.getsockname()[1]
2454
3572
if use_ipv6:
2455
3573
logger.info("Now listening on address %r, port %d,"
2456
" flowinfo %d, scope_id %d"
2457
% tcp_server.socket.getsockname())
3574
" flowinfo %d, scope_id %d",
3575
*tcp_server.socket.getsockname())
2458
3576
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
3577
logger.info("Now listening on address %r, port %d",
3578
*tcp_server.socket.getsockname())
3579
3580
# service.interface = tcp_server.socket.getsockname()[3]
3581
2464
3582
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
3583
if zeroconf:
3584
# From the Avahi example code
3585
try:
3586
service.activate()
3587
except dbus.exceptions.DBusException as error:
3588
logger.critical("D-Bus Exception", exc_info=error)
3589
cleanup()
3590
sys.exit(1)
3591
# End of Avahi example code
3592
3593
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3594
lambda *args, **kwargs:
3595
(tcp_server.handle_request
3596
(*args[2:], **kwargs) or True))
3597
2479
3598
logger.debug("Starting main loop")
2480
3599
main_loop.run()
2481
3600
except AvahiError as error:
2482
logger.critical("AvahiError: %s", error)
3601
logger.critical("Avahi Error", exc_info=error)
2483
3602
cleanup()
2484
3603
sys.exit(1)
2485
3604
except KeyboardInterrupt:
2490
3609
# Must run before the D-Bus bus name gets deregistered
2491
3610
cleanup()
2492
3611
3612
2493
3613
if __name__ == '__main__':
2494
3614
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0