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- Committer: Teddy Hogeborn
- Date: 2019-03-09 18:30:17 UTC
- mfrom: (237.26.3 trunk)
- mto: This revision was merged to the branch mainline in revision 382.
- Revision ID: teddy@recompile.se-20190309183017-5z0892yksb1rpulx
mandos-ctl: Merge refactoring changes and debug output
- files added:
- bugs.xml
- debian/upstream
- network-hooks.d
- 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
4
# Mandos server - give out binary blobs to connecting clients.
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#
5
#
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6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
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# <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
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# Copyright © 2008-2011 Björn Påhlsson
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#
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# 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
#
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# 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
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# 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
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
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#
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# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
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#
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# Contact the authors at <mandos@recompile.se>.
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#
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
74
import types
75
import binascii
76
import tempfile
77
import itertools
78
import collections
79
import codecs
65
80
66
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import dbus
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82
import dbus.service
68
import gobject
69
import avahi
83
from gi.repository import GLib
70
84
from dbus.mainloop.glib import DBusGMainLoop
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85
import ctypes
72
86
import ctypes.util
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87
import xml.dom.minidom
74
88
import inspect
75
89
90
# Try to find the value of SO_BINDTODEVICE:
76
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:
77
94
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
78
95
except AttributeError:
79
96
try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
80
99
from IN import SO_BINDTODEVICE
81
100
except ImportError:
82
SO_BINDTODEVICE = None
83
84
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version = "1.3.1"
86
87
#logger = logging.getLogger('mandos')
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logger = logging.Logger('mandos')
89
syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
95
logger.addHandler(syslogger)
96
97
console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
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"
119
stored_state_file = "clients.pickle"
120
121
logger = logging.getLogger()
122
syslogger = None
123
124
try:
125
if_nametoindex = ctypes.cdll.LoadLibrary(
126
ctypes.util.find_library("c")).if_nametoindex
127
except (OSError, AttributeError):
128
129
def if_nametoindex(interface):
130
"Get an interface index the hard way, i.e. using fcntl()"
131
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
132
with contextlib.closing(socket.socket()) as s:
133
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
134
struct.pack(b"16s16x", interface))
135
interface_index = struct.unpack("I", ifreq[16:20])[0]
136
return interface_index
137
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
155
def initlogger(debug, level=logging.WARNING):
156
"""init logger and add loglevel"""
157
158
global syslogger
159
syslogger = (logging.handlers.SysLogHandler(
160
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
161
address="/dev/log"))
162
syslogger.setFormatter(logging.Formatter
163
('Mandos [%(process)d]: %(levelname)s:'
164
' %(message)s'))
165
logger.addHandler(syslogger)
166
167
if debug:
168
console = logging.StreamHandler()
169
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
170
' [%(process)d]:'
171
' %(levelname)s:'
172
' %(message)s'))
173
logger.addHandler(console)
174
logger.setLevel(level)
175
176
177
class PGPError(Exception):
178
"""Exception if encryption/decryption fails"""
179
pass
180
181
182
class PGPEngine(object):
183
"""A simple class for OpenPGP symmetric encryption & decryption"""
184
185
def __init__(self):
186
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
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
206
def __enter__(self):
207
return self
208
209
def __exit__(self, exc_type, exc_value, traceback):
210
self._cleanup()
211
return False
212
213
def __del__(self):
214
self._cleanup()
215
216
def _cleanup(self):
217
if self.tempdir is not None:
218
# Delete contents of tempdir
219
for root, dirs, files in os.walk(self.tempdir,
220
topdown=False):
221
for filename in files:
222
os.remove(os.path.join(root, filename))
223
for dirname in dirs:
224
os.rmdir(os.path.join(root, dirname))
225
# Remove tempdir
226
os.rmdir(self.tempdir)
227
self.tempdir = None
228
229
def password_encode(self, password):
230
# Passphrase can not be empty and can not contain newlines or
231
# NUL bytes. So we prefix it and hex encode it.
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
240
def encrypt(self, data, password):
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)
256
return ciphertext
257
258
def decrypt(self, data, password):
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)
274
return decrypted_plaintext
275
276
277
# Pretend that we have an Avahi module
278
class Avahi(object):
279
"""This isn't so much a class as it is a module-like namespace.
280
It is instantiated once, and simulates having an Avahi module."""
281
IF_UNSPEC = -1 # avahi-common/address.h
282
PROTO_UNSPEC = -1 # avahi-common/address.h
283
PROTO_INET = 0 # avahi-common/address.h
284
PROTO_INET6 = 1 # avahi-common/address.h
285
DBUS_NAME = "org.freedesktop.Avahi"
286
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
287
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
288
DBUS_PATH_SERVER = "/"
289
290
def string_array_to_txt_array(self, t):
291
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
for s in t), signature="ay")
293
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
294
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
295
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
296
SERVER_INVALID = 0 # avahi-common/defs.h
297
SERVER_REGISTERING = 1 # avahi-common/defs.h
298
SERVER_RUNNING = 2 # avahi-common/defs.h
299
SERVER_COLLISION = 3 # avahi-common/defs.h
300
SERVER_FAILURE = 4 # avahi-common/defs.h
301
avahi = Avahi()
302
102
303
103
304
class AvahiError(Exception):
104
305
def __init__(self, value, *args, **kwargs):
105
306
self.value = value
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
307
return super(AvahiError, self).__init__(value, *args,
308
**kwargs)
309
109
310
110
311
class AvahiServiceError(AvahiError):
111
312
pass
112
313
314
113
315
class AvahiGroupError(AvahiError):
114
316
pass
115
317
116
318
117
319
class AvahiService(object):
118
320
"""An Avahi (Zeroconf) service.
119
321
120
322
Attributes:
121
323
interface: integer; avahi.IF_UNSPEC or an interface index.
122
324
Used to optionally bind to the specified interface.
123
325
name: string; Example: 'Mandos'
124
326
type: string; Example: '_mandos._tcp'.
125
See <http://www.dns-sd.org/ServiceTypes.html>
327
See <https://www.iana.org/assignments/service-names-port-numbers>
126
328
port: integer; what port to announce
127
329
TXT: list of strings; TXT record for the service
128
330
domain: string; Domain to publish on, default to .local if empty.
134
336
server: D-Bus Server
135
337
bus: dbus.SystemBus()
136
338
"""
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
138
servicetype = None, port = None, TXT = None,
139
domain = "", host = "", max_renames = 32768,
140
protocol = avahi.PROTO_UNSPEC, bus = None):
339
340
def __init__(self,
341
interface=avahi.IF_UNSPEC,
342
name=None,
343
servicetype=None,
344
port=None,
345
TXT=None,
346
domain="",
347
host="",
348
max_renames=32768,
349
protocol=avahi.PROTO_UNSPEC,
350
bus=None):
141
351
self.interface = interface
142
352
self.name = name
143
353
self.type = servicetype
152
362
self.server = None
153
363
self.bus = bus
154
364
self.entry_group_state_changed_match = None
155
def rename(self):
365
366
def rename(self, remove=True):
156
367
"""Derived from the Avahi example code"""
157
368
if self.rename_count >= self.max_renames:
158
369
logger.critical("No suitable Zeroconf service name found"
159
370
" after %i retries, exiting.",
160
371
self.rename_count)
161
372
raise AvahiServiceError("Too many renames")
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
373
self.name = str(
374
self.server.GetAlternativeServiceName(self.name))
375
self.rename_count += 1
163
376
logger.info("Changing Zeroconf service name to %r ...",
164
377
self.name)
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
167
' %%(levelname)s: %%(message)s'
168
% self.name))
169
self.remove()
378
if remove:
379
self.remove()
170
380
try:
171
381
self.add()
172
382
except dbus.exceptions.DBusException as error:
173
logger.critical("DBusException: %s", error)
174
self.cleanup()
175
os._exit(1)
176
self.rename_count += 1
383
if (error.get_dbus_name()
384
== "org.freedesktop.Avahi.CollisionError"):
385
logger.info("Local Zeroconf service name collision.")
386
return self.rename(remove=False)
387
else:
388
logger.critical("D-Bus Exception", exc_info=error)
389
self.cleanup()
390
os._exit(1)
391
177
392
def remove(self):
178
393
"""Derived from the Avahi example code"""
179
394
if self.entry_group_state_changed_match is not None:
181
396
self.entry_group_state_changed_match = None
182
397
if self.group is not None:
183
398
self.group.Reset()
399
184
400
def add(self):
185
401
"""Derived from the Avahi example code"""
186
402
self.remove()
191
407
avahi.DBUS_INTERFACE_ENTRY_GROUP)
192
408
self.entry_group_state_changed_match = (
193
409
self.group.connect_to_signal(
194
'StateChanged', self .entry_group_state_changed))
410
'StateChanged', self.entry_group_state_changed))
195
411
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
196
412
self.name, self.type)
197
413
self.group.AddService(
203
419
dbus.UInt16(self.port),
204
420
avahi.string_array_to_txt_array(self.TXT))
205
421
self.group.Commit()
422
206
423
def entry_group_state_changed(self, state, error):
207
424
"""Derived from the Avahi example code"""
208
425
logger.debug("Avahi entry group state change: %i", state)
209
426
210
427
if state == avahi.ENTRY_GROUP_ESTABLISHED:
211
428
logger.debug("Zeroconf service established.")
212
429
elif state == avahi.ENTRY_GROUP_COLLISION:
214
431
self.rename()
215
432
elif state == avahi.ENTRY_GROUP_FAILURE:
216
433
logger.critical("Avahi: Error in group state changed %s",
217
unicode(error))
218
raise AvahiGroupError("State changed: %s"
219
% unicode(error))
434
str(error))
435
raise AvahiGroupError("State changed: {!s}".format(error))
436
220
437
def cleanup(self):
221
438
"""Derived from the Avahi example code"""
222
439
if self.group is not None:
223
440
try:
224
441
self.group.Free()
225
442
except (dbus.exceptions.UnknownMethodException,
226
dbus.exceptions.DBusException) as e:
443
dbus.exceptions.DBusException):
227
444
pass
228
445
self.group = None
229
446
self.remove()
447
230
448
def server_state_changed(self, state, error=None):
231
449
"""Derived from the Avahi example code"""
232
450
logger.debug("Avahi server state change: %i", state)
233
bad_states = { avahi.SERVER_INVALID:
234
"Zeroconf server invalid",
235
avahi.SERVER_REGISTERING: None,
236
avahi.SERVER_COLLISION:
237
"Zeroconf server name collision",
238
avahi.SERVER_FAILURE:
239
"Zeroconf server failure" }
451
bad_states = {
452
avahi.SERVER_INVALID: "Zeroconf server invalid",
453
avahi.SERVER_REGISTERING: None,
454
avahi.SERVER_COLLISION: "Zeroconf server name collision",
455
avahi.SERVER_FAILURE: "Zeroconf server failure",
456
}
240
457
if state in bad_states:
241
458
if bad_states[state] is not None:
242
459
if error is None:
245
462
logger.error(bad_states[state] + ": %r", error)
246
463
self.cleanup()
247
464
elif state == avahi.SERVER_RUNNING:
248
self.add()
465
try:
466
self.add()
467
except dbus.exceptions.DBusException as error:
468
if (error.get_dbus_name()
469
== "org.freedesktop.Avahi.CollisionError"):
470
logger.info("Local Zeroconf service name"
471
" collision.")
472
return self.rename(remove=False)
473
else:
474
logger.critical("D-Bus Exception", exc_info=error)
475
self.cleanup()
476
os._exit(1)
249
477
else:
250
478
if error is None:
251
479
logger.debug("Unknown state: %r", state)
252
480
else:
253
481
logger.debug("Unknown state: %r: %r", state, error)
482
254
483
def activate(self):
255
484
"""Derived from the Avahi example code"""
256
485
if self.server is None:
260
489
follow_name_owner_changes=True),
261
490
avahi.DBUS_INTERFACE_SERVER)
262
491
self.server.connect_to_signal("StateChanged",
263
self.server_state_changed)
492
self.server_state_changed)
264
493
self.server_state_changed(self.server.GetState())
265
494
266
495
267
def _timedelta_to_milliseconds(td):
268
"Convert a datetime.timedelta() to milliseconds"
269
return ((td.days * 24 * 60 * 60 * 1000)
270
+ (td.seconds * 1000)
271
+ (td.microseconds // 1000))
272
496
class AvahiServiceToSyslog(AvahiService):
497
def rename(self, *args, **kwargs):
498
"""Add the new name to the syslog messages"""
499
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
500
syslogger.setFormatter(logging.Formatter(
501
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
502
.format(self.name)))
503
return ret
504
505
506
# Pretend that we have a GnuTLS module
507
class GnuTLS(object):
508
"""This isn't so much a class as it is a module-like namespace.
509
It is instantiated once, and simulates having a GnuTLS module."""
510
511
library = ctypes.util.find_library("gnutls")
512
if library is None:
513
library = ctypes.util.find_library("gnutls-deb0")
514
_library = ctypes.cdll.LoadLibrary(library)
515
del library
516
_need_version = b"3.3.0"
517
_tls_rawpk_version = b"3.6.6"
518
519
def __init__(self):
520
# Need to use "self" here, since this method is called before
521
# the assignment to the "gnutls" global variable happens.
522
if self.check_version(self._need_version) is None:
523
raise self.Error("Needs GnuTLS {} or later"
524
.format(self._need_version))
525
526
# Unless otherwise indicated, the constants and types below are
527
# all from the gnutls/gnutls.h C header file.
528
529
# Constants
530
E_SUCCESS = 0
531
E_INTERRUPTED = -52
532
E_AGAIN = -28
533
CRT_OPENPGP = 2
534
CRT_RAWPK = 3
535
CLIENT = 2
536
SHUT_RDWR = 0
537
CRD_CERTIFICATE = 1
538
E_NO_CERTIFICATE_FOUND = -49
539
X509_FMT_DER = 0
540
NO_TICKETS = 1<<10
541
ENABLE_RAWPK = 1<<18
542
CTYPE_PEERS = 3
543
KEYID_USE_SHA256 = 1 # gnutls/x509.h
544
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
545
546
# Types
547
class session_int(ctypes.Structure):
548
_fields_ = []
549
session_t = ctypes.POINTER(session_int)
550
551
class certificate_credentials_st(ctypes.Structure):
552
_fields_ = []
553
certificate_credentials_t = ctypes.POINTER(
554
certificate_credentials_st)
555
certificate_type_t = ctypes.c_int
556
557
class datum_t(ctypes.Structure):
558
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
559
('size', ctypes.c_uint)]
560
561
class openpgp_crt_int(ctypes.Structure):
562
_fields_ = []
563
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
564
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
565
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
566
credentials_type_t = ctypes.c_int
567
transport_ptr_t = ctypes.c_void_p
568
close_request_t = ctypes.c_int
569
570
# Exceptions
571
class Error(Exception):
572
# We need to use the class name "GnuTLS" here, since this
573
# exception might be raised from within GnuTLS.__init__,
574
# which is called before the assignment to the "gnutls"
575
# global variable has happened.
576
def __init__(self, message=None, code=None, args=()):
577
# Default usage is by a message string, but if a return
578
# code is passed, convert it to a string with
579
# gnutls.strerror()
580
self.code = code
581
if message is None and code is not None:
582
message = GnuTLS.strerror(code)
583
return super(GnuTLS.Error, self).__init__(
584
message, *args)
585
586
class CertificateSecurityError(Error):
587
pass
588
589
# Classes
590
class Credentials(object):
591
def __init__(self):
592
self._c_object = gnutls.certificate_credentials_t()
593
gnutls.certificate_allocate_credentials(
594
ctypes.byref(self._c_object))
595
self.type = gnutls.CRD_CERTIFICATE
596
597
def __del__(self):
598
gnutls.certificate_free_credentials(self._c_object)
599
600
class ClientSession(object):
601
def __init__(self, socket, credentials=None):
602
self._c_object = gnutls.session_t()
603
gnutls_flags = gnutls.CLIENT
604
if gnutls.check_version("3.5.6"):
605
gnutls_flags |= gnutls.NO_TICKETS
606
if gnutls.has_rawpk:
607
gnutls_flags |= gnutls.ENABLE_RAWPK
608
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
609
del gnutls_flags
610
gnutls.set_default_priority(self._c_object)
611
gnutls.transport_set_ptr(self._c_object, socket.fileno())
612
gnutls.handshake_set_private_extensions(self._c_object,
613
True)
614
self.socket = socket
615
if credentials is None:
616
credentials = gnutls.Credentials()
617
gnutls.credentials_set(self._c_object, credentials.type,
618
ctypes.cast(credentials._c_object,
619
ctypes.c_void_p))
620
self.credentials = credentials
621
622
def __del__(self):
623
gnutls.deinit(self._c_object)
624
625
def handshake(self):
626
return gnutls.handshake(self._c_object)
627
628
def send(self, data):
629
data = bytes(data)
630
data_len = len(data)
631
while data_len > 0:
632
data_len -= gnutls.record_send(self._c_object,
633
data[-data_len:],
634
data_len)
635
636
def bye(self):
637
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
638
639
# Error handling functions
640
def _error_code(result):
641
"""A function to raise exceptions on errors, suitable
642
for the 'restype' attribute on ctypes functions"""
643
if result >= 0:
644
return result
645
if result == gnutls.E_NO_CERTIFICATE_FOUND:
646
raise gnutls.CertificateSecurityError(code=result)
647
raise gnutls.Error(code=result)
648
649
def _retry_on_error(result, func, arguments):
650
"""A function to retry on some errors, suitable
651
for the 'errcheck' attribute on ctypes functions"""
652
while result < 0:
653
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
654
return _error_code(result)
655
result = func(*arguments)
656
return result
657
658
# Unless otherwise indicated, the function declarations below are
659
# all from the gnutls/gnutls.h C header file.
660
661
# Functions
662
priority_set_direct = _library.gnutls_priority_set_direct
663
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
664
ctypes.POINTER(ctypes.c_char_p)]
665
priority_set_direct.restype = _error_code
666
667
init = _library.gnutls_init
668
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
669
init.restype = _error_code
670
671
set_default_priority = _library.gnutls_set_default_priority
672
set_default_priority.argtypes = [session_t]
673
set_default_priority.restype = _error_code
674
675
record_send = _library.gnutls_record_send
676
record_send.argtypes = [session_t, ctypes.c_void_p,
677
ctypes.c_size_t]
678
record_send.restype = ctypes.c_ssize_t
679
record_send.errcheck = _retry_on_error
680
681
certificate_allocate_credentials = (
682
_library.gnutls_certificate_allocate_credentials)
683
certificate_allocate_credentials.argtypes = [
684
ctypes.POINTER(certificate_credentials_t)]
685
certificate_allocate_credentials.restype = _error_code
686
687
certificate_free_credentials = (
688
_library.gnutls_certificate_free_credentials)
689
certificate_free_credentials.argtypes = [
690
certificate_credentials_t]
691
certificate_free_credentials.restype = None
692
693
handshake_set_private_extensions = (
694
_library.gnutls_handshake_set_private_extensions)
695
handshake_set_private_extensions.argtypes = [session_t,
696
ctypes.c_int]
697
handshake_set_private_extensions.restype = None
698
699
credentials_set = _library.gnutls_credentials_set
700
credentials_set.argtypes = [session_t, credentials_type_t,
701
ctypes.c_void_p]
702
credentials_set.restype = _error_code
703
704
strerror = _library.gnutls_strerror
705
strerror.argtypes = [ctypes.c_int]
706
strerror.restype = ctypes.c_char_p
707
708
certificate_type_get = _library.gnutls_certificate_type_get
709
certificate_type_get.argtypes = [session_t]
710
certificate_type_get.restype = _error_code
711
712
certificate_get_peers = _library.gnutls_certificate_get_peers
713
certificate_get_peers.argtypes = [session_t,
714
ctypes.POINTER(ctypes.c_uint)]
715
certificate_get_peers.restype = ctypes.POINTER(datum_t)
716
717
global_set_log_level = _library.gnutls_global_set_log_level
718
global_set_log_level.argtypes = [ctypes.c_int]
719
global_set_log_level.restype = None
720
721
global_set_log_function = _library.gnutls_global_set_log_function
722
global_set_log_function.argtypes = [log_func]
723
global_set_log_function.restype = None
724
725
deinit = _library.gnutls_deinit
726
deinit.argtypes = [session_t]
727
deinit.restype = None
728
729
handshake = _library.gnutls_handshake
730
handshake.argtypes = [session_t]
731
handshake.restype = _error_code
732
handshake.errcheck = _retry_on_error
733
734
transport_set_ptr = _library.gnutls_transport_set_ptr
735
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
736
transport_set_ptr.restype = None
737
738
bye = _library.gnutls_bye
739
bye.argtypes = [session_t, close_request_t]
740
bye.restype = _error_code
741
bye.errcheck = _retry_on_error
742
743
check_version = _library.gnutls_check_version
744
check_version.argtypes = [ctypes.c_char_p]
745
check_version.restype = ctypes.c_char_p
746
747
has_rawpk = bool(check_version(_tls_rawpk_version))
748
749
if has_rawpk:
750
# Types
751
class pubkey_st(ctypes.Structure):
752
_fields = []
753
pubkey_t = ctypes.POINTER(pubkey_st)
754
755
x509_crt_fmt_t = ctypes.c_int
756
757
# All the function declarations below are from gnutls/abstract.h
758
pubkey_init = _library.gnutls_pubkey_init
759
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
760
pubkey_init.restype = _error_code
761
762
pubkey_import = _library.gnutls_pubkey_import
763
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
764
x509_crt_fmt_t]
765
pubkey_import.restype = _error_code
766
767
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
768
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
769
ctypes.POINTER(ctypes.c_ubyte),
770
ctypes.POINTER(ctypes.c_size_t)]
771
pubkey_get_key_id.restype = _error_code
772
773
pubkey_deinit = _library.gnutls_pubkey_deinit
774
pubkey_deinit.argtypes = [pubkey_t]
775
pubkey_deinit.restype = None
776
else:
777
# All the function declarations below are from gnutls/openpgp.h
778
779
openpgp_crt_init = _library.gnutls_openpgp_crt_init
780
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
781
openpgp_crt_init.restype = _error_code
782
783
openpgp_crt_import = _library.gnutls_openpgp_crt_import
784
openpgp_crt_import.argtypes = [openpgp_crt_t,
785
ctypes.POINTER(datum_t),
786
openpgp_crt_fmt_t]
787
openpgp_crt_import.restype = _error_code
788
789
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
790
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
791
ctypes.POINTER(ctypes.c_uint)]
792
openpgp_crt_verify_self.restype = _error_code
793
794
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
795
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
796
openpgp_crt_deinit.restype = None
797
798
openpgp_crt_get_fingerprint = (
799
_library.gnutls_openpgp_crt_get_fingerprint)
800
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
801
ctypes.c_void_p,
802
ctypes.POINTER(
803
ctypes.c_size_t)]
804
openpgp_crt_get_fingerprint.restype = _error_code
805
806
if check_version("3.6.4"):
807
certificate_type_get2 = _library.gnutls_certificate_type_get2
808
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
809
certificate_type_get2.restype = _error_code
810
811
# Remove non-public functions
812
del _error_code, _retry_on_error
813
# Create the global "gnutls" object, simulating a module
814
gnutls = GnuTLS()
815
816
817
def call_pipe(connection, # : multiprocessing.Connection
818
func, *args, **kwargs):
819
"""This function is meant to be called by multiprocessing.Process
820
821
This function runs func(*args, **kwargs), and writes the resulting
822
return value on the provided multiprocessing.Connection.
823
"""
824
connection.send(func(*args, **kwargs))
825
connection.close()
826
827
273
828
class Client(object):
274
829
"""A representation of a client host served by this server.
275
830
276
831
Attributes:
277
_approved: bool(); 'None' if not yet approved/disapproved
832
approved: bool(); 'None' if not yet approved/disapproved
278
833
approval_delay: datetime.timedelta(); Time to wait for approval
279
834
approval_duration: datetime.timedelta(); Duration of one approval
280
835
checker: subprocess.Popen(); a running checker process used
281
836
to see if the client lives.
282
837
'None' if no process is running.
283
checker_callback_tag: a gobject event source tag, or None
838
checker_callback_tag: a GLib event source tag, or None
284
839
checker_command: string; External command which is run to check
285
840
if client lives. %() expansions are done at
286
841
runtime with vars(self) as dict, so that for
287
842
instance %(name)s can be used in the command.
288
checker_initiator_tag: a gobject event source tag, or None
843
checker_initiator_tag: a GLib event source tag, or None
289
844
created: datetime.datetime(); (UTC) object creation
845
client_structure: Object describing what attributes a client has
846
and is used for storing the client at exit
290
847
current_checker_command: string; current running checker_command
291
disable_hook: If set, called by disable() as disable_hook(self)
292
disable_initiator_tag: a gobject event source tag, or None
848
disable_initiator_tag: a GLib event source tag, or None
293
849
enabled: bool()
294
850
fingerprint: string (40 or 32 hexadecimal digits); used to
295
uniquely identify the client
851
uniquely identify an OpenPGP client
852
key_id: string (64 hexadecimal digits); used to uniquely identify
853
a client using raw public keys
296
854
host: string; available for use by the checker command
297
855
interval: datetime.timedelta(); How often to start a new checker
298
856
last_approval_request: datetime.datetime(); (UTC) or None
299
857
last_checked_ok: datetime.datetime(); (UTC) or None
300
last_enabled: datetime.datetime(); (UTC)
858
last_checker_status: integer between 0 and 255 reflecting exit
859
status of last checker. -1 reflects crashed
860
checker, -2 means no checker completed yet.
861
last_checker_signal: The signal which killed the last checker, if
862
last_checker_status is -1
863
last_enabled: datetime.datetime(); (UTC) or None
301
864
name: string; from the config file, used in log messages and
302
865
D-Bus identifiers
303
866
secret: bytestring; sent verbatim (over TLS) to client
304
867
timeout: datetime.timedelta(); How long from last_checked_ok
305
868
until this client is disabled
306
extended_timeout: extra long timeout when password has been sent
869
extended_timeout: extra long timeout when secret has been sent
307
870
runtime_expansions: Allowed attributes for runtime expansion.
308
871
expires: datetime.datetime(); time (UTC) when a client will be
309
872
disabled, or None
873
server_settings: The server_settings dict from main()
310
874
"""
311
875
312
876
runtime_expansions = ("approval_delay", "approval_duration",
313
"created", "enabled", "fingerprint",
314
"host", "interval", "last_checked_ok",
877
"created", "enabled", "expires", "key_id",
878
"fingerprint", "host", "interval",
879
"last_approval_request", "last_checked_ok",
315
880
"last_enabled", "name", "timeout")
316
317
def timeout_milliseconds(self):
318
"Return the 'timeout' attribute in milliseconds"
319
return _timedelta_to_milliseconds(self.timeout)
320
321
def extended_timeout_milliseconds(self):
322
"Return the 'extended_timeout' attribute in milliseconds"
323
return _timedelta_to_milliseconds(self.extended_timeout)
324
325
def interval_milliseconds(self):
326
"Return the 'interval' attribute in milliseconds"
327
return _timedelta_to_milliseconds(self.interval)
328
329
def approval_delay_milliseconds(self):
330
return _timedelta_to_milliseconds(self.approval_delay)
331
332
def __init__(self, name = None, disable_hook=None, config=None):
333
"""Note: the 'checker' key in 'config' sets the
334
'checker_command' attribute and *not* the 'checker'
335
attribute."""
881
client_defaults = {
882
"timeout": "PT5M",
883
"extended_timeout": "PT15M",
884
"interval": "PT2M",
885
"checker": "fping -q -- %%(host)s",
886
"host": "",
887
"approval_delay": "PT0S",
888
"approval_duration": "PT1S",
889
"approved_by_default": "True",
890
"enabled": "True",
891
}
892
893
@staticmethod
894
def config_parser(config):
895
"""Construct a new dict of client settings of this form:
896
{ client_name: {setting_name: value, ...}, ...}
897
with exceptions for any special settings as defined above.
898
NOTE: Must be a pure function. Must return the same result
899
value given the same arguments.
900
"""
901
settings = {}
902
for client_name in config.sections():
903
section = dict(config.items(client_name))
904
client = settings[client_name] = {}
905
906
client["host"] = section["host"]
907
# Reformat values from string types to Python types
908
client["approved_by_default"] = config.getboolean(
909
client_name, "approved_by_default")
910
client["enabled"] = config.getboolean(client_name,
911
"enabled")
912
913
# Uppercase and remove spaces from key_id and fingerprint
914
# for later comparison purposes with return value from the
915
# key_id() and fingerprint() functions
916
client["key_id"] = (section.get("key_id", "").upper()
917
.replace(" ", ""))
918
client["fingerprint"] = (section["fingerprint"].upper()
919
.replace(" ", ""))
920
if "secret" in section:
921
client["secret"] = codecs.decode(section["secret"]
922
.encode("utf-8"),
923
"base64")
924
elif "secfile" in section:
925
with open(os.path.expanduser(os.path.expandvars
926
(section["secfile"])),
927
"rb") as secfile:
928
client["secret"] = secfile.read()
929
else:
930
raise TypeError("No secret or secfile for section {}"
931
.format(section))
932
client["timeout"] = string_to_delta(section["timeout"])
933
client["extended_timeout"] = string_to_delta(
934
section["extended_timeout"])
935
client["interval"] = string_to_delta(section["interval"])
936
client["approval_delay"] = string_to_delta(
937
section["approval_delay"])
938
client["approval_duration"] = string_to_delta(
939
section["approval_duration"])
940
client["checker_command"] = section["checker"]
941
client["last_approval_request"] = None
942
client["last_checked_ok"] = None
943
client["last_checker_status"] = -2
944
945
return settings
946
947
def __init__(self, settings, name=None, server_settings=None):
336
948
self.name = name
337
if config is None:
338
config = {}
949
if server_settings is None:
950
server_settings = {}
951
self.server_settings = server_settings
952
# adding all client settings
953
for setting, value in settings.items():
954
setattr(self, setting, value)
955
956
if self.enabled:
957
if not hasattr(self, "last_enabled"):
958
self.last_enabled = datetime.datetime.utcnow()
959
if not hasattr(self, "expires"):
960
self.expires = (datetime.datetime.utcnow()
961
+ self.timeout)
962
else:
963
self.last_enabled = None
964
self.expires = None
965
339
966
logger.debug("Creating client %r", self.name)
340
# Uppercase and remove spaces from fingerprint for later
341
# comparison purposes with return value from the fingerprint()
342
# function
343
self.fingerprint = (config["fingerprint"].upper()
344
.replace(" ", ""))
967
logger.debug(" Key ID: %s", self.key_id)
345
968
logger.debug(" Fingerprint: %s", self.fingerprint)
346
if "secret" in config:
347
self.secret = config["secret"].decode("base64")
348
elif "secfile" in config:
349
with open(os.path.expanduser(os.path.expandvars
350
(config["secfile"])),
351
"rb") as secfile:
352
self.secret = secfile.read()
353
else:
354
raise TypeError("No secret or secfile for client %s"
355
% self.name)
356
self.host = config.get("host", "")
357
self.created = datetime.datetime.utcnow()
358
self.enabled = False
359
self.last_approval_request = None
360
self.last_enabled = None
361
self.last_checked_ok = None
362
self.timeout = string_to_delta(config["timeout"])
363
self.extended_timeout = string_to_delta(config["extended_timeout"])
364
self.interval = string_to_delta(config["interval"])
365
self.disable_hook = disable_hook
969
self.created = settings.get("created",
970
datetime.datetime.utcnow())
971
972
# attributes specific for this server instance
366
973
self.checker = None
367
974
self.checker_initiator_tag = None
368
975
self.disable_initiator_tag = None
369
self.expires = None
370
976
self.checker_callback_tag = None
371
self.checker_command = config["checker"]
372
977
self.current_checker_command = None
373
self.last_connect = None
374
self._approved = None
375
self.approved_by_default = config.get("approved_by_default",
376
True)
978
self.approved = None
377
979
self.approvals_pending = 0
378
self.approval_delay = string_to_delta(
379
config["approval_delay"])
380
self.approval_duration = string_to_delta(
381
config["approval_duration"])
382
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
383
980
self.changedstate = multiprocessing_manager.Condition(
981
multiprocessing_manager.Lock())
982
self.client_structure = [attr
983
for attr in self.__dict__.keys()
984
if not attr.startswith("_")]
985
self.client_structure.append("client_structure")
986
987
for name, t in inspect.getmembers(
988
type(self), lambda obj: isinstance(obj, property)):
989
if not name.startswith("_"):
990
self.client_structure.append(name)
991
992
# Send notice to process children that client state has changed
384
993
def send_changedstate(self):
385
self.changedstate.acquire()
386
self.changedstate.notify_all()
387
self.changedstate.release()
388
994
with self.changedstate:
995
self.changedstate.notify_all()
996
389
997
def enable(self):
390
998
"""Start this client's checker and timeout hooks"""
391
999
if getattr(self, "enabled", False):
392
1000
# Already enabled
393
1001
return
394
self.send_changedstate()
395
# Schedule a new checker to be started an 'interval' from now,
396
# and every interval from then on.
397
self.checker_initiator_tag = (gobject.timeout_add
398
(self.interval_milliseconds(),
399
self.start_checker))
400
# Schedule a disable() when 'timeout' has passed
401
1002
self.expires = datetime.datetime.utcnow() + self.timeout
402
self.disable_initiator_tag = (gobject.timeout_add
403
(self.timeout_milliseconds(),
404
self.disable))
405
1003
self.enabled = True
406
1004
self.last_enabled = datetime.datetime.utcnow()
407
# Also start a new checker *right now*.
408
self.start_checker()
409
1005
self.init_checker()
1006
self.send_changedstate()
1007
410
1008
def disable(self, quiet=True):
411
1009
"""Disable this client."""
412
1010
if not getattr(self, "enabled", False):
413
1011
return False
414
1012
if not quiet:
415
self.send_changedstate()
416
if not quiet:
417
1013
logger.info("Disabling client %s", self.name)
418
if getattr(self, "disable_initiator_tag", False):
419
gobject.source_remove(self.disable_initiator_tag)
1014
if getattr(self, "disable_initiator_tag", None) is not None:
1015
GLib.source_remove(self.disable_initiator_tag)
420
1016
self.disable_initiator_tag = None
421
1017
self.expires = None
422
if getattr(self, "checker_initiator_tag", False):
423
gobject.source_remove(self.checker_initiator_tag)
1018
if getattr(self, "checker_initiator_tag", None) is not None:
1019
GLib.source_remove(self.checker_initiator_tag)
424
1020
self.checker_initiator_tag = None
425
1021
self.stop_checker()
426
if self.disable_hook:
427
self.disable_hook(self)
428
1022
self.enabled = False
429
# Do not run this again if called by a gobject.timeout_add
1023
if not quiet:
1024
self.send_changedstate()
1025
# Do not run this again if called by a GLib.timeout_add
430
1026
return False
431
1027
432
1028
def __del__(self):
433
self.disable_hook = None
434
1029
self.disable()
435
436
def checker_callback(self, pid, condition, command):
1030
1031
def init_checker(self):
1032
# Schedule a new checker to be started an 'interval' from now,
1033
# and every interval from then on.
1034
if self.checker_initiator_tag is not None:
1035
GLib.source_remove(self.checker_initiator_tag)
1036
self.checker_initiator_tag = GLib.timeout_add(
1037
int(self.interval.total_seconds() * 1000),
1038
self.start_checker)
1039
# Schedule a disable() when 'timeout' has passed
1040
if self.disable_initiator_tag is not None:
1041
GLib.source_remove(self.disable_initiator_tag)
1042
self.disable_initiator_tag = GLib.timeout_add(
1043
int(self.timeout.total_seconds() * 1000), self.disable)
1044
# Also start a new checker *right now*.
1045
self.start_checker()
1046
1047
def checker_callback(self, source, condition, connection,
1048
command):
437
1049
"""The checker has completed, so take appropriate actions."""
438
1050
self.checker_callback_tag = None
439
1051
self.checker = None
440
if os.WIFEXITED(condition):
441
exitstatus = os.WEXITSTATUS(condition)
442
if exitstatus == 0:
1052
# Read return code from connection (see call_pipe)
1053
returncode = connection.recv()
1054
connection.close()
1055
1056
if returncode >= 0:
1057
self.last_checker_status = returncode
1058
self.last_checker_signal = None
1059
if self.last_checker_status == 0:
443
1060
logger.info("Checker for %(name)s succeeded",
444
1061
vars(self))
445
1062
self.checked_ok()
446
1063
else:
447
logger.info("Checker for %(name)s failed",
448
vars(self))
1064
logger.info("Checker for %(name)s failed", vars(self))
449
1065
else:
1066
self.last_checker_status = -1
1067
self.last_checker_signal = -returncode
450
1068
logger.warning("Checker for %(name)s crashed?",
451
1069
vars(self))
452
453
def checked_ok(self, timeout=None):
454
"""Bump up the timeout for this client.
455
456
This should only be called when the client has been seen,
457
alive and well.
458
"""
1070
return False
1071
1072
def checked_ok(self):
1073
"""Assert that the client has been seen, alive and well."""
1074
self.last_checked_ok = datetime.datetime.utcnow()
1075
self.last_checker_status = 0
1076
self.last_checker_signal = None
1077
self.bump_timeout()
1078
1079
def bump_timeout(self, timeout=None):
1080
"""Bump up the timeout for this client."""
459
1081
if timeout is None:
460
1082
timeout = self.timeout
461
self.last_checked_ok = datetime.datetime.utcnow()
462
gobject.source_remove(self.disable_initiator_tag)
463
self.expires = datetime.datetime.utcnow() + timeout
464
self.disable_initiator_tag = (gobject.timeout_add
465
(_timedelta_to_milliseconds(timeout),
466
self.disable))
467
1083
if self.disable_initiator_tag is not None:
1084
GLib.source_remove(self.disable_initiator_tag)
1085
self.disable_initiator_tag = None
1086
if getattr(self, "enabled", False):
1087
self.disable_initiator_tag = GLib.timeout_add(
1088
int(timeout.total_seconds() * 1000), self.disable)
1089
self.expires = datetime.datetime.utcnow() + timeout
1090
468
1091
def need_approval(self):
469
1092
self.last_approval_request = datetime.datetime.utcnow()
470
1093
471
1094
def start_checker(self):
472
1095
"""Start a new checker subprocess if one is not running.
473
1096
474
1097
If a checker already exists, leave it running and do
475
1098
nothing."""
476
1099
# The reason for not killing a running checker is that if we
477
# did that, then if a checker (for some reason) started
478
# running slowly and taking more than 'interval' time, the
479
# client would inevitably timeout, since no checker would get
480
# a chance to run to completion. If we instead leave running
1100
# did that, and if a checker (for some reason) started running
1101
# slowly and taking more than 'interval' time, then the client
1102
# would inevitably timeout, since no checker would get a
1103
# chance to run to completion. If we instead leave running
481
1104
# checkers alone, the checker would have to take more time
482
1105
# than 'timeout' for the client to be disabled, which is as it
483
1106
# should be.
484
485
# If a checker exists, make sure it is not a zombie
486
try:
487
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
488
except (AttributeError, OSError) as error:
489
if (isinstance(error, OSError)
490
and error.errno != errno.ECHILD):
491
raise error
492
else:
493
if pid:
494
logger.warning("Checker was a zombie")
495
gobject.source_remove(self.checker_callback_tag)
496
self.checker_callback(pid, status,
497
self.current_checker_command)
1107
1108
if self.checker is not None and not self.checker.is_alive():
1109
logger.warning("Checker was not alive; joining")
1110
self.checker.join()
1111
self.checker = None
498
1112
# Start a new checker if needed
499
1113
if self.checker is None:
1114
# Escape attributes for the shell
1115
escaped_attrs = {
1116
attr: re.escape(str(getattr(self, attr)))
1117
for attr in self.runtime_expansions}
500
1118
try:
501
# In case checker_command has exactly one % operator
502
command = self.checker_command % self.host
503
except TypeError:
504
# Escape attributes for the shell
505
escaped_attrs = dict(
506
(attr,
507
re.escape(unicode(str(getattr(self, attr, "")),
508
errors=
509
'replace')))
510
for attr in
511
self.runtime_expansions)
512
513
try:
514
command = self.checker_command % escaped_attrs
515
except TypeError as error:
516
logger.error('Could not format string "%s":'
517
' %s', self.checker_command, error)
518
return True # Try again later
1119
command = self.checker_command % escaped_attrs
1120
except TypeError as error:
1121
logger.error('Could not format string "%s"',
1122
self.checker_command,
1123
exc_info=error)
1124
return True # Try again later
519
1125
self.current_checker_command = command
520
try:
521
logger.info("Starting checker %r for %s",
522
command, self.name)
523
# We don't need to redirect stdout and stderr, since
524
# in normal mode, that is already done by daemon(),
525
# and in debug mode we don't want to. (Stdin is
526
# always replaced by /dev/null.)
527
self.checker = subprocess.Popen(command,
528
close_fds=True,
529
shell=True, cwd="/")
530
self.checker_callback_tag = (gobject.child_watch_add
531
(self.checker.pid,
532
self.checker_callback,
533
data=command))
534
# The checker may have completed before the gobject
535
# watch was added. Check for this.
536
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
537
if pid:
538
gobject.source_remove(self.checker_callback_tag)
539
self.checker_callback(pid, status, command)
540
except OSError as error:
541
logger.error("Failed to start subprocess: %s",
542
error)
543
# Re-run this periodically if run by gobject.timeout_add
1126
logger.info("Starting checker %r for %s", command,
1127
self.name)
1128
# We don't need to redirect stdout and stderr, since
1129
# in normal mode, that is already done by daemon(),
1130
# and in debug mode we don't want to. (Stdin is
1131
# always replaced by /dev/null.)
1132
# The exception is when not debugging but nevertheless
1133
# running in the foreground; use the previously
1134
# created wnull.
1135
popen_args = {"close_fds": True,
1136
"shell": True,
1137
"cwd": "/"}
1138
if (not self.server_settings["debug"]
1139
and self.server_settings["foreground"]):
1140
popen_args.update({"stdout": wnull,
1141
"stderr": wnull})
1142
pipe = multiprocessing.Pipe(duplex=False)
1143
self.checker = multiprocessing.Process(
1144
target=call_pipe,
1145
args=(pipe[1], subprocess.call, command),
1146
kwargs=popen_args)
1147
self.checker.start()
1148
self.checker_callback_tag = GLib.io_add_watch(
1149
pipe[0].fileno(), GLib.IO_IN,
1150
self.checker_callback, pipe[0], command)
1151
# Re-run this periodically if run by GLib.timeout_add
544
1152
return True
545
1153
546
1154
def stop_checker(self):
547
1155
"""Force the checker process, if any, to stop."""
548
1156
if self.checker_callback_tag:
549
gobject.source_remove(self.checker_callback_tag)
1157
GLib.source_remove(self.checker_callback_tag)
550
1158
self.checker_callback_tag = None
551
1159
if getattr(self, "checker", None) is None:
552
1160
return
553
1161
logger.debug("Stopping checker for %(name)s", vars(self))
554
try:
555
os.kill(self.checker.pid, signal.SIGTERM)
556
#time.sleep(0.5)
557
#if self.checker.poll() is None:
558
# os.kill(self.checker.pid, signal.SIGKILL)
559
except OSError as error:
560
if error.errno != errno.ESRCH: # No such process
561
raise
1162
self.checker.terminate()
562
1163
self.checker = None
563
1164
564
def dbus_service_property(dbus_interface, signature="v",
565
access="readwrite", byte_arrays=False):
1165
1166
def dbus_service_property(dbus_interface,
1167
signature="v",
1168
access="readwrite",
1169
byte_arrays=False):
566
1170
"""Decorators for marking methods of a DBusObjectWithProperties to
567
1171
become properties on the D-Bus.
568
1172
569
1173
The decorated method will be called with no arguments by "Get"
570
1174
and with one argument by "Set".
571
1175
572
1176
The parameters, where they are supported, are the same as
573
1177
dbus.service.method, except there is only "signature", since the
574
1178
type from Get() and the type sent to Set() is the same.
577
1181
# "Set" method, so we fail early here:
578
1182
if byte_arrays and signature != "ay":
579
1183
raise ValueError("Byte arrays not supported for non-'ay'"
580
" signature %r" % signature)
1184
" signature {!r}".format(signature))
1185
581
1186
def decorator(func):
582
1187
func._dbus_is_property = True
583
1188
func._dbus_interface = dbus_interface
586
1191
func._dbus_name = func.__name__
587
1192
if func._dbus_name.endswith("_dbus_property"):
588
1193
func._dbus_name = func._dbus_name[:-14]
589
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
590
return func
1194
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1195
return func
1196
1197
return decorator
1198
1199
1200
def dbus_interface_annotations(dbus_interface):
1201
"""Decorator for marking functions returning interface annotations
1202
1203
Usage:
1204
1205
@dbus_interface_annotations("org.example.Interface")
1206
def _foo(self): # Function name does not matter
1207
return {"org.freedesktop.DBus.Deprecated": "true",
1208
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1209
"false"}
1210
"""
1211
1212
def decorator(func):
1213
func._dbus_is_interface = True
1214
func._dbus_interface = dbus_interface
1215
func._dbus_name = dbus_interface
1216
return func
1217
1218
return decorator
1219
1220
1221
def dbus_annotations(annotations):
1222
"""Decorator to annotate D-Bus methods, signals or properties
1223
Usage:
1224
1225
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1226
"org.freedesktop.DBus.Property."
1227
"EmitsChangedSignal": "false"})
1228
@dbus_service_property("org.example.Interface", signature="b",
1229
access="r")
1230
def Property_dbus_property(self):
1231
return dbus.Boolean(False)
1232
1233
See also the DBusObjectWithAnnotations class.
1234
"""
1235
1236
def decorator(func):
1237
func._dbus_annotations = annotations
1238
return func
1239
591
1240
return decorator
592
1241
593
1242
594
1243
class DBusPropertyException(dbus.exceptions.DBusException):
595
1244
"""A base class for D-Bus property-related exceptions
596
1245
"""
597
def __unicode__(self):
598
return unicode(str(self))
1246
pass
599
1247
600
1248
601
1249
class DBusPropertyAccessException(DBusPropertyException):
610
1258
pass
611
1259
612
1260
613
class DBusObjectWithProperties(dbus.service.Object):
1261
class DBusObjectWithAnnotations(dbus.service.Object):
1262
"""A D-Bus object with annotations.
1263
1264
Classes inheriting from this can use the dbus_annotations
1265
decorator to add annotations to methods or signals.
1266
"""
1267
1268
@staticmethod
1269
def _is_dbus_thing(thing):
1270
"""Returns a function testing if an attribute is a D-Bus thing
1271
1272
If called like _is_dbus_thing("method") it returns a function
1273
suitable for use as predicate to inspect.getmembers().
1274
"""
1275
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1276
False)
1277
1278
def _get_all_dbus_things(self, thing):
1279
"""Returns a generator of (name, attribute) pairs
1280
"""
1281
return ((getattr(athing.__get__(self), "_dbus_name", name),
1282
athing.__get__(self))
1283
for cls in self.__class__.__mro__
1284
for name, athing in
1285
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1286
1287
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1288
out_signature="s",
1289
path_keyword='object_path',
1290
connection_keyword='connection')
1291
def Introspect(self, object_path, connection):
1292
"""Overloading of standard D-Bus method.
1293
1294
Inserts annotation tags on methods and signals.
1295
"""
1296
xmlstring = dbus.service.Object.Introspect(self, object_path,
1297
connection)
1298
try:
1299
document = xml.dom.minidom.parseString(xmlstring)
1300
1301
for if_tag in document.getElementsByTagName("interface"):
1302
# Add annotation tags
1303
for typ in ("method", "signal"):
1304
for tag in if_tag.getElementsByTagName(typ):
1305
annots = dict()
1306
for name, prop in (self.
1307
_get_all_dbus_things(typ)):
1308
if (name == tag.getAttribute("name")
1309
and prop._dbus_interface
1310
== if_tag.getAttribute("name")):
1311
annots.update(getattr(
1312
prop, "_dbus_annotations", {}))
1313
for name, value in annots.items():
1314
ann_tag = document.createElement(
1315
"annotation")
1316
ann_tag.setAttribute("name", name)
1317
ann_tag.setAttribute("value", value)
1318
tag.appendChild(ann_tag)
1319
# Add interface annotation tags
1320
for annotation, value in dict(
1321
itertools.chain.from_iterable(
1322
annotations().items()
1323
for name, annotations
1324
in self._get_all_dbus_things("interface")
1325
if name == if_tag.getAttribute("name")
1326
)).items():
1327
ann_tag = document.createElement("annotation")
1328
ann_tag.setAttribute("name", annotation)
1329
ann_tag.setAttribute("value", value)
1330
if_tag.appendChild(ann_tag)
1331
# Fix argument name for the Introspect method itself
1332
if (if_tag.getAttribute("name")
1333
== dbus.INTROSPECTABLE_IFACE):
1334
for cn in if_tag.getElementsByTagName("method"):
1335
if cn.getAttribute("name") == "Introspect":
1336
for arg in cn.getElementsByTagName("arg"):
1337
if (arg.getAttribute("direction")
1338
== "out"):
1339
arg.setAttribute("name",
1340
"xml_data")
1341
xmlstring = document.toxml("utf-8")
1342
document.unlink()
1343
except (AttributeError, xml.dom.DOMException,
1344
xml.parsers.expat.ExpatError) as error:
1345
logger.error("Failed to override Introspection method",
1346
exc_info=error)
1347
return xmlstring
1348
1349
1350
class DBusObjectWithProperties(DBusObjectWithAnnotations):
614
1351
"""A D-Bus object with properties.
615
1352
616
1353
Classes inheriting from this can use the dbus_service_property
617
1354
decorator to expose methods as D-Bus properties. It exposes the
618
1355
standard Get(), Set(), and GetAll() methods on the D-Bus.
619
1356
"""
620
621
@staticmethod
622
def _is_dbus_property(obj):
623
return getattr(obj, "_dbus_is_property", False)
624
625
def _get_all_dbus_properties(self):
626
"""Returns a generator of (name, attribute) pairs
627
"""
628
return ((prop._dbus_name, prop)
629
for name, prop in
630
inspect.getmembers(self, self._is_dbus_property))
631
1357
632
1358
def _get_dbus_property(self, interface_name, property_name):
633
1359
"""Returns a bound method if one exists which is a D-Bus
634
1360
property with the specified name and interface.
635
1361
"""
636
for name in (property_name,
637
property_name + "_dbus_property"):
638
prop = getattr(self, name, None)
639
if (prop is None
640
or not self._is_dbus_property(prop)
641
or prop._dbus_name != property_name
642
or (interface_name and prop._dbus_interface
643
and interface_name != prop._dbus_interface)):
644
continue
645
return prop
1362
for cls in self.__class__.__mro__:
1363
for name, value in inspect.getmembers(
1364
cls, self._is_dbus_thing("property")):
1365
if (value._dbus_name == property_name
1366
and value._dbus_interface == interface_name):
1367
return value.__get__(self)
1368
646
1369
# No such property
647
raise DBusPropertyNotFound(self.dbus_object_path + ":"
648
+ interface_name + "."
649
+ property_name)
650
651
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1370
raise DBusPropertyNotFound("{}:{}.{}".format(
1371
self.dbus_object_path, interface_name, property_name))
1372
1373
@classmethod
1374
def _get_all_interface_names(cls):
1375
"""Get a sequence of all interfaces supported by an object"""
1376
return (name for name in set(getattr(getattr(x, attr),
1377
"_dbus_interface", None)
1378
for x in (inspect.getmro(cls))
1379
for attr in dir(x))
1380
if name is not None)
1381
1382
@dbus.service.method(dbus.PROPERTIES_IFACE,
1383
in_signature="ss",
652
1384
out_signature="v")
653
1385
def Get(self, interface_name, property_name):
654
1386
"""Standard D-Bus property Get() method, see D-Bus standard.
660
1392
if not hasattr(value, "variant_level"):
661
1393
return value
662
1394
return type(value)(value, variant_level=value.variant_level+1)
663
1395
664
1396
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
665
1397
def Set(self, interface_name, property_name, value):
666
1398
"""Standard D-Bus property Set() method, see D-Bus standard.
672
1404
# The byte_arrays option is not supported yet on
673
1405
# signatures other than "ay".
674
1406
if prop._dbus_signature != "ay":
675
raise ValueError
676
value = dbus.ByteArray(''.join(unichr(byte)
677
for byte in value))
1407
raise ValueError("Byte arrays not supported for non-"
1408
"'ay' signature {!r}"
1409
.format(prop._dbus_signature))
1410
value = dbus.ByteArray(b''.join(chr(byte)
1411
for byte in value))
678
1412
prop(value)
679
680
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1413
1414
@dbus.service.method(dbus.PROPERTIES_IFACE,
1415
in_signature="s",
681
1416
out_signature="a{sv}")
682
1417
def GetAll(self, interface_name):
683
1418
"""Standard D-Bus property GetAll() method, see D-Bus
685
1420
686
1421
Note: Will not include properties with access="write".
687
1422
"""
688
all = {}
689
for name, prop in self._get_all_dbus_properties():
1423
properties = {}
1424
for name, prop in self._get_all_dbus_things("property"):
690
1425
if (interface_name
691
1426
and interface_name != prop._dbus_interface):
692
1427
# Interface non-empty but did not match
696
1431
continue
697
1432
value = prop()
698
1433
if not hasattr(value, "variant_level"):
699
all[name] = value
1434
properties[name] = value
700
1435
continue
701
all[name] = type(value)(value, variant_level=
702
value.variant_level+1)
703
return dbus.Dictionary(all, signature="sv")
704
1436
properties[name] = type(value)(
1437
value, variant_level=value.variant_level + 1)
1438
return dbus.Dictionary(properties, signature="sv")
1439
1440
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1441
def PropertiesChanged(self, interface_name, changed_properties,
1442
invalidated_properties):
1443
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1444
standard.
1445
"""
1446
pass
1447
705
1448
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
706
1449
out_signature="s",
707
1450
path_keyword='object_path',
708
1451
connection_keyword='connection')
709
1452
def Introspect(self, object_path, connection):
710
"""Standard D-Bus method, overloaded to insert property tags.
1453
"""Overloading of standard D-Bus method.
1454
1455
Inserts property tags and interface annotation tags.
711
1456
"""
712
xmlstring = dbus.service.Object.Introspect(self, object_path,
713
connection)
1457
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1458
object_path,
1459
connection)
714
1460
try:
715
1461
document = xml.dom.minidom.parseString(xmlstring)
1462
716
1463
def make_tag(document, name, prop):
717
1464
e = document.createElement("property")
718
1465
e.setAttribute("name", name)
719
1466
e.setAttribute("type", prop._dbus_signature)
720
1467
e.setAttribute("access", prop._dbus_access)
721
1468
return e
1469
722
1470
for if_tag in document.getElementsByTagName("interface"):
1471
# Add property tags
723
1472
for tag in (make_tag(document, name, prop)
724
1473
for name, prop
725
in self._get_all_dbus_properties()
1474
in self._get_all_dbus_things("property")
726
1475
if prop._dbus_interface
727
1476
== if_tag.getAttribute("name")):
728
1477
if_tag.appendChild(tag)
1478
# Add annotation tags for properties
1479
for tag in if_tag.getElementsByTagName("property"):
1480
annots = dict()
1481
for name, prop in self._get_all_dbus_things(
1482
"property"):
1483
if (name == tag.getAttribute("name")
1484
and prop._dbus_interface
1485
== if_tag.getAttribute("name")):
1486
annots.update(getattr(
1487
prop, "_dbus_annotations", {}))
1488
for name, value in annots.items():
1489
ann_tag = document.createElement(
1490
"annotation")
1491
ann_tag.setAttribute("name", name)
1492
ann_tag.setAttribute("value", value)
1493
tag.appendChild(ann_tag)
729
1494
# Add the names to the return values for the
730
1495
# "org.freedesktop.DBus.Properties" methods
731
1496
if (if_tag.getAttribute("name")
746
1511
except (AttributeError, xml.dom.DOMException,
747
1512
xml.parsers.expat.ExpatError) as error:
748
1513
logger.error("Failed to override Introspection method",
749
error)
750
return xmlstring
751
752
753
def datetime_to_dbus (dt, variant_level=0):
1514
exc_info=error)
1515
return xmlstring
1516
1517
1518
try:
1519
dbus.OBJECT_MANAGER_IFACE
1520
except AttributeError:
1521
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1522
1523
1524
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1525
"""A D-Bus object with an ObjectManager.
1526
1527
Classes inheriting from this exposes the standard
1528
GetManagedObjects call and the InterfacesAdded and
1529
InterfacesRemoved signals on the standard
1530
"org.freedesktop.DBus.ObjectManager" interface.
1531
1532
Note: No signals are sent automatically; they must be sent
1533
manually.
1534
"""
1535
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1536
out_signature="a{oa{sa{sv}}}")
1537
def GetManagedObjects(self):
1538
"""This function must be overridden"""
1539
raise NotImplementedError()
1540
1541
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1542
signature="oa{sa{sv}}")
1543
def InterfacesAdded(self, object_path, interfaces_and_properties):
1544
pass
1545
1546
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1547
def InterfacesRemoved(self, object_path, interfaces):
1548
pass
1549
1550
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1551
out_signature="s",
1552
path_keyword='object_path',
1553
connection_keyword='connection')
1554
def Introspect(self, object_path, connection):
1555
"""Overloading of standard D-Bus method.
1556
1557
Override return argument name of GetManagedObjects to be
1558
"objpath_interfaces_and_properties"
1559
"""
1560
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1561
object_path,
1562
connection)
1563
try:
1564
document = xml.dom.minidom.parseString(xmlstring)
1565
1566
for if_tag in document.getElementsByTagName("interface"):
1567
# Fix argument name for the GetManagedObjects method
1568
if (if_tag.getAttribute("name")
1569
== dbus.OBJECT_MANAGER_IFACE):
1570
for cn in if_tag.getElementsByTagName("method"):
1571
if (cn.getAttribute("name")
1572
== "GetManagedObjects"):
1573
for arg in cn.getElementsByTagName("arg"):
1574
if (arg.getAttribute("direction")
1575
== "out"):
1576
arg.setAttribute(
1577
"name",
1578
"objpath_interfaces"
1579
"_and_properties")
1580
xmlstring = document.toxml("utf-8")
1581
document.unlink()
1582
except (AttributeError, xml.dom.DOMException,
1583
xml.parsers.expat.ExpatError) as error:
1584
logger.error("Failed to override Introspection method",
1585
exc_info=error)
1586
return xmlstring
1587
1588
1589
def datetime_to_dbus(dt, variant_level=0):
754
1590
"""Convert a UTC datetime.datetime() to a D-Bus type."""
755
1591
if dt is None:
756
return dbus.String("", variant_level = variant_level)
757
return dbus.String(dt.isoformat(),
758
variant_level=variant_level)
759
1592
return dbus.String("", variant_level=variant_level)
1593
return dbus.String(dt.isoformat(), variant_level=variant_level)
1594
1595
1596
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1597
"""A class decorator; applied to a subclass of
1598
dbus.service.Object, it will add alternate D-Bus attributes with
1599
interface names according to the "alt_interface_names" mapping.
1600
Usage:
1601
1602
@alternate_dbus_interfaces({"org.example.Interface":
1603
"net.example.AlternateInterface"})
1604
class SampleDBusObject(dbus.service.Object):
1605
@dbus.service.method("org.example.Interface")
1606
def SampleDBusMethod():
1607
pass
1608
1609
The above "SampleDBusMethod" on "SampleDBusObject" will be
1610
reachable via two interfaces: "org.example.Interface" and
1611
"net.example.AlternateInterface", the latter of which will have
1612
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1613
"true", unless "deprecate" is passed with a False value.
1614
1615
This works for methods and signals, and also for D-Bus properties
1616
(from DBusObjectWithProperties) and interfaces (from the
1617
dbus_interface_annotations decorator).
1618
"""
1619
1620
def wrapper(cls):
1621
for orig_interface_name, alt_interface_name in (
1622
alt_interface_names.items()):
1623
attr = {}
1624
interface_names = set()
1625
# Go though all attributes of the class
1626
for attrname, attribute in inspect.getmembers(cls):
1627
# Ignore non-D-Bus attributes, and D-Bus attributes
1628
# with the wrong interface name
1629
if (not hasattr(attribute, "_dbus_interface")
1630
or not attribute._dbus_interface.startswith(
1631
orig_interface_name)):
1632
continue
1633
# Create an alternate D-Bus interface name based on
1634
# the current name
1635
alt_interface = attribute._dbus_interface.replace(
1636
orig_interface_name, alt_interface_name)
1637
interface_names.add(alt_interface)
1638
# Is this a D-Bus signal?
1639
if getattr(attribute, "_dbus_is_signal", False):
1640
# Extract the original non-method undecorated
1641
# function by black magic
1642
if sys.version_info.major == 2:
1643
nonmethod_func = (dict(
1644
zip(attribute.func_code.co_freevars,
1645
attribute.__closure__))
1646
["func"].cell_contents)
1647
else:
1648
nonmethod_func = (dict(
1649
zip(attribute.__code__.co_freevars,
1650
attribute.__closure__))
1651
["func"].cell_contents)
1652
# Create a new, but exactly alike, function
1653
# object, and decorate it to be a new D-Bus signal
1654
# with the alternate D-Bus interface name
1655
new_function = copy_function(nonmethod_func)
1656
new_function = (dbus.service.signal(
1657
alt_interface,
1658
attribute._dbus_signature)(new_function))
1659
# Copy annotations, if any
1660
try:
1661
new_function._dbus_annotations = dict(
1662
attribute._dbus_annotations)
1663
except AttributeError:
1664
pass
1665
1666
# Define a creator of a function to call both the
1667
# original and alternate functions, so both the
1668
# original and alternate signals gets sent when
1669
# the function is called
1670
def fixscope(func1, func2):
1671
"""This function is a scope container to pass
1672
func1 and func2 to the "call_both" function
1673
outside of its arguments"""
1674
1675
@functools.wraps(func2)
1676
def call_both(*args, **kwargs):
1677
"""This function will emit two D-Bus
1678
signals by calling func1 and func2"""
1679
func1(*args, **kwargs)
1680
func2(*args, **kwargs)
1681
# Make wrapper function look like a D-Bus
1682
# signal
1683
for name, attr in inspect.getmembers(func2):
1684
if name.startswith("_dbus_"):
1685
setattr(call_both, name, attr)
1686
1687
return call_both
1688
# Create the "call_both" function and add it to
1689
# the class
1690
attr[attrname] = fixscope(attribute, new_function)
1691
# Is this a D-Bus method?
1692
elif getattr(attribute, "_dbus_is_method", False):
1693
# Create a new, but exactly alike, function
1694
# object. Decorate it to be a new D-Bus method
1695
# with the alternate D-Bus interface name. Add it
1696
# to the class.
1697
attr[attrname] = (
1698
dbus.service.method(
1699
alt_interface,
1700
attribute._dbus_in_signature,
1701
attribute._dbus_out_signature)
1702
(copy_function(attribute)))
1703
# Copy annotations, if any
1704
try:
1705
attr[attrname]._dbus_annotations = dict(
1706
attribute._dbus_annotations)
1707
except AttributeError:
1708
pass
1709
# Is this a D-Bus property?
1710
elif getattr(attribute, "_dbus_is_property", False):
1711
# Create a new, but exactly alike, function
1712
# object, and decorate it to be a new D-Bus
1713
# property with the alternate D-Bus interface
1714
# name. Add it to the class.
1715
attr[attrname] = (dbus_service_property(
1716
alt_interface, attribute._dbus_signature,
1717
attribute._dbus_access,
1718
attribute._dbus_get_args_options
1719
["byte_arrays"])
1720
(copy_function(attribute)))
1721
# Copy annotations, if any
1722
try:
1723
attr[attrname]._dbus_annotations = dict(
1724
attribute._dbus_annotations)
1725
except AttributeError:
1726
pass
1727
# Is this a D-Bus interface?
1728
elif getattr(attribute, "_dbus_is_interface", False):
1729
# Create a new, but exactly alike, function
1730
# object. Decorate it to be a new D-Bus interface
1731
# with the alternate D-Bus interface name. Add it
1732
# to the class.
1733
attr[attrname] = (
1734
dbus_interface_annotations(alt_interface)
1735
(copy_function(attribute)))
1736
if deprecate:
1737
# Deprecate all alternate interfaces
1738
iname = "_AlternateDBusNames_interface_annotation{}"
1739
for interface_name in interface_names:
1740
1741
@dbus_interface_annotations(interface_name)
1742
def func(self):
1743
return {"org.freedesktop.DBus.Deprecated":
1744
"true"}
1745
# Find an unused name
1746
for aname in (iname.format(i)
1747
for i in itertools.count()):
1748
if aname not in attr:
1749
attr[aname] = func
1750
break
1751
if interface_names:
1752
# Replace the class with a new subclass of it with
1753
# methods, signals, etc. as created above.
1754
if sys.version_info.major == 2:
1755
cls = type(b"{}Alternate".format(cls.__name__),
1756
(cls, ), attr)
1757
else:
1758
cls = type("{}Alternate".format(cls.__name__),
1759
(cls, ), attr)
1760
return cls
1761
1762
return wrapper
1763
1764
1765
@alternate_dbus_interfaces({"se.recompile.Mandos":
1766
"se.bsnet.fukt.Mandos"})
760
1767
class ClientDBus(Client, DBusObjectWithProperties):
761
1768
"""A Client class using D-Bus
762
1769
763
1770
Attributes:
764
1771
dbus_object_path: dbus.ObjectPath
765
1772
bus: dbus.SystemBus()
766
1773
"""
767
1774
768
1775
runtime_expansions = (Client.runtime_expansions
769
+ ("dbus_object_path",))
770
1776
+ ("dbus_object_path", ))
1777
1778
_interface = "se.recompile.Mandos.Client"
1779
771
1780
# dbus.service.Object doesn't use super(), so we can't either.
772
773
def __init__(self, bus = None, *args, **kwargs):
774
self._approvals_pending = 0
1781
1782
def __init__(self, bus=None, *args, **kwargs):
775
1783
self.bus = bus
776
1784
Client.__init__(self, *args, **kwargs)
777
1785
# Only now, when this client is initialized, can it show up on
778
1786
# the D-Bus
779
client_object_name = unicode(self.name).translate(
1787
client_object_name = str(self.name).translate(
780
1788
{ord("."): ord("_"),
781
1789
ord("-"): ord("_")})
782
self.dbus_object_path = (dbus.ObjectPath
783
("/clients/" + client_object_name))
1790
self.dbus_object_path = dbus.ObjectPath(
1791
"/clients/" + client_object_name)
784
1792
DBusObjectWithProperties.__init__(self, self.bus,
785
1793
self.dbus_object_path)
786
787
def notifychangeproperty(transform_func,
788
dbus_name, type_func=lambda x: x,
789
variant_level=1):
790
""" Modify a variable so that its a property that announce its
791
changes to DBus.
792
transform_fun: Function that takes a value and transform it to
793
DBus type.
794
dbus_name: DBus name of the variable
1794
1795
def notifychangeproperty(transform_func, dbus_name,
1796
type_func=lambda x: x,
1797
variant_level=1,
1798
invalidate_only=False,
1799
_interface=_interface):
1800
""" Modify a variable so that it's a property which announces
1801
its changes to DBus.
1802
1803
transform_fun: Function that takes a value and a variant_level
1804
and transforms it to a D-Bus type.
1805
dbus_name: D-Bus name of the variable
795
1806
type_func: Function that transform the value before sending it
796
to DBus
797
variant_level: DBus variant level. default: 1
1807
to the D-Bus. Default: no transform
1808
variant_level: D-Bus variant level. Default: 1
798
1809
"""
799
real_value = [None,]
1810
attrname = "_{}".format(dbus_name)
1811
800
1812
def setter(self, value):
801
old_value = real_value[0]
802
real_value[0] = value
803
1813
if hasattr(self, "dbus_object_path"):
804
if type_func(old_value) != type_func(real_value[0]):
805
dbus_value = transform_func(type_func(real_value[0]),
806
variant_level)
807
self.PropertyChanged(dbus.String(dbus_name),
808
dbus_value)
809
810
return property(lambda self: real_value[0], setter)
811
1814
if (not hasattr(self, attrname) or
1815
type_func(getattr(self, attrname, None))
1816
!= type_func(value)):
1817
if invalidate_only:
1818
self.PropertiesChanged(
1819
_interface, dbus.Dictionary(),
1820
dbus.Array((dbus_name, )))
1821
else:
1822
dbus_value = transform_func(
1823
type_func(value),
1824
variant_level=variant_level)
1825
self.PropertyChanged(dbus.String(dbus_name),
1826
dbus_value)
1827
self.PropertiesChanged(
1828
_interface,
1829
dbus.Dictionary({dbus.String(dbus_name):
1830
dbus_value}),
1831
dbus.Array())
1832
setattr(self, attrname, value)
1833
1834
return property(lambda self: getattr(self, attrname), setter)
812
1835
813
1836
expires = notifychangeproperty(datetime_to_dbus, "Expires")
814
1837
approvals_pending = notifychangeproperty(dbus.Boolean,
815
1838
"ApprovalPending",
816
type_func = bool)
1839
type_func=bool)
817
1840
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
818
1841
last_enabled = notifychangeproperty(datetime_to_dbus,
819
1842
"LastEnabled")
820
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
821
type_func = lambda checker: checker is not None)
1843
checker = notifychangeproperty(
1844
dbus.Boolean, "CheckerRunning",
1845
type_func=lambda checker: checker is not None)
822
1846
last_checked_ok = notifychangeproperty(datetime_to_dbus,
823
1847
"LastCheckedOK")
824
last_approval_request = notifychangeproperty(datetime_to_dbus,
825
"LastApprovalRequest")
1848
last_checker_status = notifychangeproperty(dbus.Int16,
1849
"LastCheckerStatus")
1850
last_approval_request = notifychangeproperty(
1851
datetime_to_dbus, "LastApprovalRequest")
826
1852
approved_by_default = notifychangeproperty(dbus.Boolean,
827
1853
"ApprovedByDefault")
828
approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",
829
type_func = _timedelta_to_milliseconds)
830
approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",
831
type_func = _timedelta_to_milliseconds)
1854
approval_delay = notifychangeproperty(
1855
dbus.UInt64, "ApprovalDelay",
1856
type_func=lambda td: td.total_seconds() * 1000)
1857
approval_duration = notifychangeproperty(
1858
dbus.UInt64, "ApprovalDuration",
1859
type_func=lambda td: td.total_seconds() * 1000)
832
1860
host = notifychangeproperty(dbus.String, "Host")
833
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
834
type_func = _timedelta_to_milliseconds)
835
extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",
836
type_func = _timedelta_to_milliseconds)
837
interval = notifychangeproperty(dbus.UInt16, "Interval",
838
type_func = _timedelta_to_milliseconds)
1861
timeout = notifychangeproperty(
1862
dbus.UInt64, "Timeout",
1863
type_func=lambda td: td.total_seconds() * 1000)
1864
extended_timeout = notifychangeproperty(
1865
dbus.UInt64, "ExtendedTimeout",
1866
type_func=lambda td: td.total_seconds() * 1000)
1867
interval = notifychangeproperty(
1868
dbus.UInt64, "Interval",
1869
type_func=lambda td: td.total_seconds() * 1000)
839
1870
checker_command = notifychangeproperty(dbus.String, "Checker")
840
1871
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1872
invalidate_only=True)
1873
841
1874
del notifychangeproperty
842
1875
843
1876
def __del__(self, *args, **kwargs):
844
1877
try:
845
1878
self.remove_from_connection()
848
1881
if hasattr(DBusObjectWithProperties, "__del__"):
849
1882
DBusObjectWithProperties.__del__(self, *args, **kwargs)
850
1883
Client.__del__(self, *args, **kwargs)
851
852
def checker_callback(self, pid, condition, command,
853
*args, **kwargs):
854
self.checker_callback_tag = None
855
self.checker = None
856
if os.WIFEXITED(condition):
857
exitstatus = os.WEXITSTATUS(condition)
1884
1885
def checker_callback(self, source, condition,
1886
connection, command, *args, **kwargs):
1887
ret = Client.checker_callback(self, source, condition,
1888
connection, command, *args,
1889
**kwargs)
1890
exitstatus = self.last_checker_status
1891
if exitstatus >= 0:
858
1892
# Emit D-Bus signal
859
1893
self.CheckerCompleted(dbus.Int16(exitstatus),
860
dbus.Int64(condition),
1894
# This is specific to GNU libC
1895
dbus.Int64(exitstatus << 8),
861
1896
dbus.String(command))
862
1897
else:
863
1898
# Emit D-Bus signal
864
1899
self.CheckerCompleted(dbus.Int16(-1),
865
dbus.Int64(condition),
1900
dbus.Int64(
1901
# This is specific to GNU libC
1902
(exitstatus << 8)
1903
| self.last_checker_signal),
866
1904
dbus.String(command))
867
868
return Client.checker_callback(self, pid, condition, command,
869
*args, **kwargs)
1905
return ret
870
1906
871
1907
def start_checker(self, *args, **kwargs):
872
old_checker = self.checker
873
if self.checker is not None:
874
old_checker_pid = self.checker.pid
875
else:
876
old_checker_pid = None
1908
old_checker_pid = getattr(self.checker, "pid", None)
877
1909
r = Client.start_checker(self, *args, **kwargs)
878
1910
# Only if new checker process was started
879
1911
if (self.checker is not None
881
1913
# Emit D-Bus signal
882
1914
self.CheckerStarted(self.current_checker_command)
883
1915
return r
884
1916
885
1917
def _reset_approved(self):
886
self._approved = None
1918
self.approved = None
887
1919
return False
888
1920
889
1921
def approve(self, value=True):
1922
self.approved = value
1923
GLib.timeout_add(int(self.approval_duration.total_seconds()
1924
* 1000), self._reset_approved)
890
1925
self.send_changedstate()
891
self._approved = value
892
gobject.timeout_add(_timedelta_to_milliseconds
893
(self.approval_duration),
894
self._reset_approved)
895
896
897
## D-Bus methods, signals & properties
898
_interface = "se.bsnet.fukt.Mandos.Client"
899
900
## Signals
901
1926
1927
# D-Bus methods, signals & properties
1928
1929
# Interfaces
1930
1931
# Signals
1932
902
1933
# CheckerCompleted - signal
903
1934
@dbus.service.signal(_interface, signature="nxs")
904
1935
def CheckerCompleted(self, exitcode, waitstatus, command):
905
1936
"D-Bus signal"
906
1937
pass
907
1938
908
1939
# CheckerStarted - signal
909
1940
@dbus.service.signal(_interface, signature="s")
910
1941
def CheckerStarted(self, command):
911
1942
"D-Bus signal"
912
1943
pass
913
1944
914
1945
# PropertyChanged - signal
1946
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
915
1947
@dbus.service.signal(_interface, signature="sv")
916
1948
def PropertyChanged(self, property, value):
917
1949
"D-Bus signal"
918
1950
pass
919
1951
920
1952
# GotSecret - signal
921
1953
@dbus.service.signal(_interface)
922
1954
def GotSecret(self):
925
1957
server to mandos-client
926
1958
"""
927
1959
pass
928
1960
929
1961
# Rejected - signal
930
1962
@dbus.service.signal(_interface, signature="s")
931
1963
def Rejected(self, reason):
932
1964
"D-Bus signal"
933
1965
pass
934
1966
935
1967
# NeedApproval - signal
936
1968
@dbus.service.signal(_interface, signature="tb")
937
1969
def NeedApproval(self, timeout, default):
938
1970
"D-Bus signal"
939
1971
return self.need_approval()
940
941
## Methods
942
1972
1973
# Methods
1974
943
1975
# Approve - method
944
1976
@dbus.service.method(_interface, in_signature="b")
945
1977
def Approve(self, value):
946
1978
self.approve(value)
947
1979
948
1980
# CheckedOK - method
949
1981
@dbus.service.method(_interface)
950
1982
def CheckedOK(self):
951
1983
self.checked_ok()
952
1984
953
1985
# Enable - method
1986
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
954
1987
@dbus.service.method(_interface)
955
1988
def Enable(self):
956
1989
"D-Bus method"
957
1990
self.enable()
958
1991
959
1992
# StartChecker - method
1993
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
960
1994
@dbus.service.method(_interface)
961
1995
def StartChecker(self):
962
1996
"D-Bus method"
963
1997
self.start_checker()
964
1998
965
1999
# Disable - method
2000
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
966
2001
@dbus.service.method(_interface)
967
2002
def Disable(self):
968
2003
"D-Bus method"
969
2004
self.disable()
970
2005
971
2006
# StopChecker - method
2007
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
972
2008
@dbus.service.method(_interface)
973
2009
def StopChecker(self):
974
2010
self.stop_checker()
975
976
## Properties
977
2011
2012
# Properties
2013
978
2014
# ApprovalPending - property
979
2015
@dbus_service_property(_interface, signature="b", access="read")
980
2016
def ApprovalPending_dbus_property(self):
981
2017
return dbus.Boolean(bool(self.approvals_pending))
982
2018
983
2019
# ApprovedByDefault - property
984
@dbus_service_property(_interface, signature="b",
2020
@dbus_service_property(_interface,
2021
signature="b",
985
2022
access="readwrite")
986
2023
def ApprovedByDefault_dbus_property(self, value=None):
987
2024
if value is None: # get
988
2025
return dbus.Boolean(self.approved_by_default)
989
2026
self.approved_by_default = bool(value)
990
2027
991
2028
# ApprovalDelay - property
992
@dbus_service_property(_interface, signature="t",
2029
@dbus_service_property(_interface,
2030
signature="t",
993
2031
access="readwrite")
994
2032
def ApprovalDelay_dbus_property(self, value=None):
995
2033
if value is None: # get
996
return dbus.UInt64(self.approval_delay_milliseconds())
2034
return dbus.UInt64(self.approval_delay.total_seconds()
2035
* 1000)
997
2036
self.approval_delay = datetime.timedelta(0, 0, 0, value)
998
2037
999
2038
# ApprovalDuration - property
1000
@dbus_service_property(_interface, signature="t",
2039
@dbus_service_property(_interface,
2040
signature="t",
1001
2041
access="readwrite")
1002
2042
def ApprovalDuration_dbus_property(self, value=None):
1003
2043
if value is None: # get
1004
return dbus.UInt64(_timedelta_to_milliseconds(
1005
self.approval_duration))
2044
return dbus.UInt64(self.approval_duration.total_seconds()
2045
* 1000)
1006
2046
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1007
2047
1008
2048
# Name - property
2049
@dbus_annotations(
2050
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1009
2051
@dbus_service_property(_interface, signature="s", access="read")
1010
2052
def Name_dbus_property(self):
1011
2053
return dbus.String(self.name)
1012
2054
2055
# KeyID - property
2056
@dbus_annotations(
2057
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2058
@dbus_service_property(_interface, signature="s", access="read")
2059
def KeyID_dbus_property(self):
2060
return dbus.String(self.key_id)
2061
1013
2062
# Fingerprint - property
2063
@dbus_annotations(
2064
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1014
2065
@dbus_service_property(_interface, signature="s", access="read")
1015
2066
def Fingerprint_dbus_property(self):
1016
2067
return dbus.String(self.fingerprint)
1017
2068
1018
2069
# Host - property
1019
@dbus_service_property(_interface, signature="s",
2070
@dbus_service_property(_interface,
2071
signature="s",
1020
2072
access="readwrite")
1021
2073
def Host_dbus_property(self, value=None):
1022
2074
if value is None: # get
1023
2075
return dbus.String(self.host)
1024
self.host = value
1025
2076
self.host = str(value)
2077
1026
2078
# Created - property
2079
@dbus_annotations(
2080
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1027
2081
@dbus_service_property(_interface, signature="s", access="read")
1028
2082
def Created_dbus_property(self):
1029
return dbus.String(datetime_to_dbus(self.created))
1030
2083
return datetime_to_dbus(self.created)
2084
1031
2085
# LastEnabled - property
1032
2086
@dbus_service_property(_interface, signature="s", access="read")
1033
2087
def LastEnabled_dbus_property(self):
1034
2088
return datetime_to_dbus(self.last_enabled)
1035
2089
1036
2090
# Enabled - property
1037
@dbus_service_property(_interface, signature="b",
2091
@dbus_service_property(_interface,
2092
signature="b",
1038
2093
access="readwrite")
1039
2094
def Enabled_dbus_property(self, value=None):
1040
2095
if value is None: # get
1043
2098
self.enable()
1044
2099
else:
1045
2100
self.disable()
1046
2101
1047
2102
# LastCheckedOK - property
1048
@dbus_service_property(_interface, signature="s",
2103
@dbus_service_property(_interface,
2104
signature="s",
1049
2105
access="readwrite")
1050
2106
def LastCheckedOK_dbus_property(self, value=None):
1051
2107
if value is not None:
1052
2108
self.checked_ok()
1053
2109
return
1054
2110
return datetime_to_dbus(self.last_checked_ok)
1055
2111
2112
# LastCheckerStatus - property
2113
@dbus_service_property(_interface, signature="n", access="read")
2114
def LastCheckerStatus_dbus_property(self):
2115
return dbus.Int16(self.last_checker_status)
2116
1056
2117
# Expires - property
1057
2118
@dbus_service_property(_interface, signature="s", access="read")
1058
2119
def Expires_dbus_property(self):
1059
2120
return datetime_to_dbus(self.expires)
1060
2121
1061
2122
# LastApprovalRequest - property
1062
2123
@dbus_service_property(_interface, signature="s", access="read")
1063
2124
def LastApprovalRequest_dbus_property(self):
1064
2125
return datetime_to_dbus(self.last_approval_request)
1065
2126
1066
2127
# Timeout - property
1067
@dbus_service_property(_interface, signature="t",
2128
@dbus_service_property(_interface,
2129
signature="t",
1068
2130
access="readwrite")
1069
2131
def Timeout_dbus_property(self, value=None):
1070
2132
if value is None: # get
1071
return dbus.UInt64(self.timeout_milliseconds())
2133
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2134
old_timeout = self.timeout
1072
2135
self.timeout = datetime.timedelta(0, 0, 0, value)
1073
if getattr(self, "disable_initiator_tag", None) is None:
1074
return
1075
# Reschedule timeout
1076
gobject.source_remove(self.disable_initiator_tag)
1077
self.disable_initiator_tag = None
1078
self.expires = None
1079
time_to_die = (self.
1080
_timedelta_to_milliseconds((self
1081
.last_checked_ok
1082
+ self.timeout)
1083
- datetime.datetime
1084
.utcnow()))
1085
if time_to_die <= 0:
1086
# The timeout has passed
1087
self.disable()
1088
else:
1089
self.expires = (datetime.datetime.utcnow()
1090
+ datetime.timedelta(milliseconds = time_to_die))
1091
self.disable_initiator_tag = (gobject.timeout_add
1092
(time_to_die, self.disable))
2136
# Reschedule disabling
2137
if self.enabled:
2138
now = datetime.datetime.utcnow()
2139
self.expires += self.timeout - old_timeout
2140
if self.expires <= now:
2141
# The timeout has passed
2142
self.disable()
2143
else:
2144
if (getattr(self, "disable_initiator_tag", None)
2145
is None):
2146
return
2147
GLib.source_remove(self.disable_initiator_tag)
2148
self.disable_initiator_tag = GLib.timeout_add(
2149
int((self.expires - now).total_seconds() * 1000),
2150
self.disable)
1093
2151
1094
2152
# ExtendedTimeout - property
1095
@dbus_service_property(_interface, signature="t",
2153
@dbus_service_property(_interface,
2154
signature="t",
1096
2155
access="readwrite")
1097
2156
def ExtendedTimeout_dbus_property(self, value=None):
1098
2157
if value is None: # get
1099
return dbus.UInt64(self.extended_timeout_milliseconds())
2158
return dbus.UInt64(self.extended_timeout.total_seconds()
2159
* 1000)
1100
2160
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1101
2161
1102
2162
# Interval - property
1103
@dbus_service_property(_interface, signature="t",
2163
@dbus_service_property(_interface,
2164
signature="t",
1104
2165
access="readwrite")
1105
2166
def Interval_dbus_property(self, value=None):
1106
2167
if value is None: # get
1107
return dbus.UInt64(self.interval_milliseconds())
2168
return dbus.UInt64(self.interval.total_seconds() * 1000)
1108
2169
self.interval = datetime.timedelta(0, 0, 0, value)
1109
2170
if getattr(self, "checker_initiator_tag", None) is None:
1110
2171
return
1111
# Reschedule checker run
1112
gobject.source_remove(self.checker_initiator_tag)
1113
self.checker_initiator_tag = (gobject.timeout_add
1114
(value, self.start_checker))
1115
self.start_checker() # Start one now, too
2172
if self.enabled:
2173
# Reschedule checker run
2174
GLib.source_remove(self.checker_initiator_tag)
2175
self.checker_initiator_tag = GLib.timeout_add(
2176
value, self.start_checker)
2177
self.start_checker() # Start one now, too
1116
2178
1117
2179
# Checker - property
1118
@dbus_service_property(_interface, signature="s",
2180
@dbus_service_property(_interface,
2181
signature="s",
1119
2182
access="readwrite")
1120
2183
def Checker_dbus_property(self, value=None):
1121
2184
if value is None: # get
1122
2185
return dbus.String(self.checker_command)
1123
self.checker_command = value
1124
2186
self.checker_command = str(value)
2187
1125
2188
# CheckerRunning - property
1126
@dbus_service_property(_interface, signature="b",
2189
@dbus_service_property(_interface,
2190
signature="b",
1127
2191
access="readwrite")
1128
2192
def CheckerRunning_dbus_property(self, value=None):
1129
2193
if value is None: # get
1132
2196
self.start_checker()
1133
2197
else:
1134
2198
self.stop_checker()
1135
2199
1136
2200
# ObjectPath - property
2201
@dbus_annotations(
2202
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2203
"org.freedesktop.DBus.Deprecated": "true"})
1137
2204
@dbus_service_property(_interface, signature="o", access="read")
1138
2205
def ObjectPath_dbus_property(self):
1139
return self.dbus_object_path # is already a dbus.ObjectPath
1140
2206
return self.dbus_object_path # is already a dbus.ObjectPath
2207
1141
2208
# Secret = property
1142
@dbus_service_property(_interface, signature="ay",
1143
access="write", byte_arrays=True)
2209
@dbus_annotations(
2210
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2211
"invalidates"})
2212
@dbus_service_property(_interface,
2213
signature="ay",
2214
access="write",
2215
byte_arrays=True)
1144
2216
def Secret_dbus_property(self, value):
1145
self.secret = str(value)
1146
2217
self.secret = bytes(value)
2218
1147
2219
del _interface
1148
2220
1149
2221
1150
2222
class ProxyClient(object):
1151
def __init__(self, child_pipe, fpr, address):
2223
def __init__(self, child_pipe, key_id, fpr, address):
1152
2224
self._pipe = child_pipe
1153
self._pipe.send(('init', fpr, address))
2225
self._pipe.send(('init', key_id, fpr, address))
1154
2226
if not self._pipe.recv():
1155
raise KeyError()
2227
raise KeyError(key_id or fpr)
1156
2228
1157
2229
def __getattribute__(self, name):
1158
if(name == '_pipe'):
2230
if name == '_pipe':
1159
2231
return super(ProxyClient, self).__getattribute__(name)
1160
2232
self._pipe.send(('getattr', name))
1161
2233
data = self._pipe.recv()
1162
2234
if data[0] == 'data':
1163
2235
return data[1]
1164
2236
if data[0] == 'function':
2237
1165
2238
def func(*args, **kwargs):
1166
2239
self._pipe.send(('funcall', name, args, kwargs))
1167
2240
return self._pipe.recv()[1]
2241
1168
2242
return func
1169
2243
1170
2244
def __setattr__(self, name, value):
1171
if(name == '_pipe'):
2245
if name == '_pipe':
1172
2246
return super(ProxyClient, self).__setattr__(name, value)
1173
2247
self._pipe.send(('setattr', name, value))
1174
2248
1175
2249
1176
2250
class ClientHandler(socketserver.BaseRequestHandler, object):
1177
2251
"""A class to handle client connections.
1178
2252
1179
2253
Instantiated once for each connection to handle it.
1180
2254
Note: This will run in its own forked process."""
1181
2255
1182
2256
def handle(self):
1183
2257
with contextlib.closing(self.server.child_pipe) as child_pipe:
1184
2258
logger.info("TCP connection from: %s",
1185
unicode(self.client_address))
2259
str(self.client_address))
1186
2260
logger.debug("Pipe FD: %d",
1187
2261
self.server.child_pipe.fileno())
1188
2262
1189
session = (gnutls.connection
1190
.ClientSession(self.request,
1191
gnutls.connection
1192
.X509Credentials()))
1193
1194
# Note: gnutls.connection.X509Credentials is really a
1195
# generic GnuTLS certificate credentials object so long as
1196
# no X.509 keys are added to it. Therefore, we can use it
1197
# here despite using OpenPGP certificates.
1198
1199
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1200
# "+AES-256-CBC", "+SHA1",
1201
# "+COMP-NULL", "+CTYPE-OPENPGP",
1202
# "+DHE-DSS"))
2263
session = gnutls.ClientSession(self.request)
2264
2265
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2266
# "+AES-256-CBC", "+SHA1",
2267
# "+COMP-NULL", "+CTYPE-OPENPGP",
2268
# "+DHE-DSS"))
1203
2269
# Use a fallback default, since this MUST be set.
1204
2270
priority = self.server.gnutls_priority
1205
2271
if priority is None:
1206
2272
priority = "NORMAL"
1207
(gnutls.library.functions
1208
.gnutls_priority_set_direct(session._c_object,
1209
priority, None))
2273
gnutls.priority_set_direct(session._c_object,
2274
priority.encode("utf-8"),
2275
None)
1210
2276
1211
2277
# Start communication using the Mandos protocol
1212
2278
# Get protocol number
1214
2280
logger.debug("Protocol version: %r", line)
1215
2281
try:
1216
2282
if int(line.strip().split()[0]) > 1:
1217
raise RuntimeError
2283
raise RuntimeError(line)
1218
2284
except (ValueError, IndexError, RuntimeError) as error:
1219
2285
logger.error("Unknown protocol version: %s", error)
1220
2286
return
1222
2288
# Start GnuTLS connection
1223
2289
try:
1224
2290
session.handshake()
1225
except gnutls.errors.GNUTLSError as error:
2291
except gnutls.Error as error:
1226
2292
logger.warning("Handshake failed: %s", error)
1227
2293
# Do not run session.bye() here: the session is not
1228
2294
# established. Just abandon the request.
1231
2297
1232
2298
approval_required = False
1233
2299
try:
1234
try:
1235
fpr = self.fingerprint(self.peer_certificate
1236
(session))
1237
except (TypeError,
1238
gnutls.errors.GNUTLSError) as error:
1239
logger.warning("Bad certificate: %s", error)
1240
return
1241
logger.debug("Fingerprint: %s", fpr)
1242
1243
try:
1244
client = ProxyClient(child_pipe, fpr,
2300
if gnutls.has_rawpk:
2301
fpr = ""
2302
try:
2303
key_id = self.key_id(
2304
self.peer_certificate(session))
2305
except (TypeError, gnutls.Error) as error:
2306
logger.warning("Bad certificate: %s", error)
2307
return
2308
logger.debug("Key ID: %s", key_id)
2309
2310
else:
2311
key_id = ""
2312
try:
2313
fpr = self.fingerprint(
2314
self.peer_certificate(session))
2315
except (TypeError, gnutls.Error) as error:
2316
logger.warning("Bad certificate: %s", error)
2317
return
2318
logger.debug("Fingerprint: %s", fpr)
2319
2320
try:
2321
client = ProxyClient(child_pipe, key_id, fpr,
1245
2322
self.client_address)
1246
2323
except KeyError:
1247
2324
return
1248
2325
1249
2326
if client.approval_delay:
1250
2327
delay = client.approval_delay
1251
2328
client.approvals_pending += 1
1252
2329
approval_required = True
1253
2330
1254
2331
while True:
1255
2332
if not client.enabled:
1256
2333
logger.info("Client %s is disabled",
1257
client.name)
2334
client.name)
1258
2335
if self.server.use_dbus:
1259
2336
# Emit D-Bus signal
1260
client.Rejected("Disabled")
2337
client.Rejected("Disabled")
1261
2338
return
1262
1263
if client._approved or not client.approval_delay:
1264
#We are approved or approval is disabled
2339
2340
if client.approved or not client.approval_delay:
2341
# We are approved or approval is disabled
1265
2342
break
1266
elif client._approved is None:
2343
elif client.approved is None:
1267
2344
logger.info("Client %s needs approval",
1268
2345
client.name)
1269
2346
if self.server.use_dbus:
1270
2347
# Emit D-Bus signal
1271
2348
client.NeedApproval(
1272
client.approval_delay_milliseconds(),
1273
client.approved_by_default)
2349
client.approval_delay.total_seconds()
2350
* 1000, client.approved_by_default)
1274
2351
else:
1275
2352
logger.warning("Client %s was not approved",
1276
2353
client.name)
1278
2355
# Emit D-Bus signal
1279
2356
client.Rejected("Denied")
1280
2357
return
1281
1282
#wait until timeout or approved
1283
#x = float(client._timedelta_to_milliseconds(delay))
2358
2359
# wait until timeout or approved
1284
2360
time = datetime.datetime.now()
1285
2361
client.changedstate.acquire()
1286
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
2362
client.changedstate.wait(delay.total_seconds())
1287
2363
client.changedstate.release()
1288
2364
time2 = datetime.datetime.now()
1289
2365
if (time2 - time) >= delay:
1299
2375
break
1300
2376
else:
1301
2377
delay -= time2 - time
1302
1303
sent_size = 0
1304
while sent_size < len(client.secret):
1305
try:
1306
sent = session.send(client.secret[sent_size:])
1307
except gnutls.errors.GNUTLSError as error:
1308
logger.warning("gnutls send failed")
1309
return
1310
logger.debug("Sent: %d, remaining: %d",
1311
sent, len(client.secret)
1312
- (sent_size + sent))
1313
sent_size += sent
2378
2379
try:
2380
session.send(client.secret)
2381
except gnutls.Error as error:
2382
logger.warning("gnutls send failed",
2383
exc_info=error)
2384
return
1314
2385
1315
2386
logger.info("Sending secret to %s", client.name)
1316
# bump the timeout as if seen
1317
client.checked_ok(client.extended_timeout)
2387
# bump the timeout using extended_timeout
2388
client.bump_timeout(client.extended_timeout)
1318
2389
if self.server.use_dbus:
1319
2390
# Emit D-Bus signal
1320
2391
client.GotSecret()
1321
2392
1322
2393
finally:
1323
2394
if approval_required:
1324
2395
client.approvals_pending -= 1
1325
2396
try:
1326
2397
session.bye()
1327
except gnutls.errors.GNUTLSError as error:
1328
logger.warning("GnuTLS bye failed")
1329
2398
except gnutls.Error as error:
2399
logger.warning("GnuTLS bye failed",
2400
exc_info=error)
2401
1330
2402
@staticmethod
1331
2403
def peer_certificate(session):
1332
"Return the peer's OpenPGP certificate as a bytestring"
1333
# If not an OpenPGP certificate...
1334
if (gnutls.library.functions
1335
.gnutls_certificate_type_get(session._c_object)
1336
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1337
# ...do the normal thing
1338
return session.peer_certificate
2404
"Return the peer's certificate as a bytestring"
2405
try:
2406
cert_type = gnutls.certificate_type_get2(session._c_object,
2407
gnutls.CTYPE_PEERS)
2408
except AttributeError:
2409
cert_type = gnutls.certificate_type_get(session._c_object)
2410
if gnutls.has_rawpk:
2411
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2412
else:
2413
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2414
# If not a valid certificate type...
2415
if cert_type not in valid_cert_types:
2416
logger.info("Cert type %r not in %r", cert_type,
2417
valid_cert_types)
2418
# ...return invalid data
2419
return b""
1339
2420
list_size = ctypes.c_uint(1)
1340
cert_list = (gnutls.library.functions
1341
.gnutls_certificate_get_peers
2421
cert_list = (gnutls.certificate_get_peers
1342
2422
(session._c_object, ctypes.byref(list_size)))
1343
2423
if not bool(cert_list) and list_size.value != 0:
1344
raise gnutls.errors.GNUTLSError("error getting peer"
1345
" certificate")
2424
raise gnutls.Error("error getting peer certificate")
1346
2425
if list_size.value == 0:
1347
2426
return None
1348
2427
cert = cert_list[0]
1349
2428
return ctypes.string_at(cert.data, cert.size)
1350
2429
2430
@staticmethod
2431
def key_id(certificate):
2432
"Convert a certificate bytestring to a hexdigit key ID"
2433
# New GnuTLS "datum" with the public key
2434
datum = gnutls.datum_t(
2435
ctypes.cast(ctypes.c_char_p(certificate),
2436
ctypes.POINTER(ctypes.c_ubyte)),
2437
ctypes.c_uint(len(certificate)))
2438
# XXX all these need to be created in the gnutls "module"
2439
# New empty GnuTLS certificate
2440
pubkey = gnutls.pubkey_t()
2441
gnutls.pubkey_init(ctypes.byref(pubkey))
2442
# Import the raw public key into the certificate
2443
gnutls.pubkey_import(pubkey,
2444
ctypes.byref(datum),
2445
gnutls.X509_FMT_DER)
2446
# New buffer for the key ID
2447
buf = ctypes.create_string_buffer(32)
2448
buf_len = ctypes.c_size_t(len(buf))
2449
# Get the key ID from the raw public key into the buffer
2450
gnutls.pubkey_get_key_id(pubkey,
2451
gnutls.KEYID_USE_SHA256,
2452
ctypes.cast(ctypes.byref(buf),
2453
ctypes.POINTER(ctypes.c_ubyte)),
2454
ctypes.byref(buf_len))
2455
# Deinit the certificate
2456
gnutls.pubkey_deinit(pubkey)
2457
2458
# Convert the buffer to a Python bytestring
2459
key_id = ctypes.string_at(buf, buf_len.value)
2460
# Convert the bytestring to hexadecimal notation
2461
hex_key_id = binascii.hexlify(key_id).upper()
2462
return hex_key_id
2463
1351
2464
@staticmethod
1352
2465
def fingerprint(openpgp):
1353
2466
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1354
2467
# New GnuTLS "datum" with the OpenPGP public key
1355
datum = (gnutls.library.types
1356
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1357
ctypes.POINTER
1358
(ctypes.c_ubyte)),
1359
ctypes.c_uint(len(openpgp))))
2468
datum = gnutls.datum_t(
2469
ctypes.cast(ctypes.c_char_p(openpgp),
2470
ctypes.POINTER(ctypes.c_ubyte)),
2471
ctypes.c_uint(len(openpgp)))
1360
2472
# New empty GnuTLS certificate
1361
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1362
(gnutls.library.functions
1363
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2473
crt = gnutls.openpgp_crt_t()
2474
gnutls.openpgp_crt_init(ctypes.byref(crt))
1364
2475
# Import the OpenPGP public key into the certificate
1365
(gnutls.library.functions
1366
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1367
gnutls.library.constants
1368
.GNUTLS_OPENPGP_FMT_RAW))
2476
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2477
gnutls.OPENPGP_FMT_RAW)
1369
2478
# Verify the self signature in the key
1370
2479
crtverify = ctypes.c_uint()
1371
(gnutls.library.functions
1372
.gnutls_openpgp_crt_verify_self(crt, 0,
1373
ctypes.byref(crtverify)))
2480
gnutls.openpgp_crt_verify_self(crt, 0,
2481
ctypes.byref(crtverify))
1374
2482
if crtverify.value != 0:
1375
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1376
raise (gnutls.errors.CertificateSecurityError
1377
("Verify failed"))
2483
gnutls.openpgp_crt_deinit(crt)
2484
raise gnutls.CertificateSecurityError(code
2485
=crtverify.value)
1378
2486
# New buffer for the fingerprint
1379
2487
buf = ctypes.create_string_buffer(20)
1380
2488
buf_len = ctypes.c_size_t()
1381
2489
# Get the fingerprint from the certificate into the buffer
1382
(gnutls.library.functions
1383
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1384
ctypes.byref(buf_len)))
2490
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2491
ctypes.byref(buf_len))
1385
2492
# Deinit the certificate
1386
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2493
gnutls.openpgp_crt_deinit(crt)
1387
2494
# Convert the buffer to a Python bytestring
1388
2495
fpr = ctypes.string_at(buf, buf_len.value)
1389
2496
# Convert the bytestring to hexadecimal notation
1390
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2497
hex_fpr = binascii.hexlify(fpr).upper()
1391
2498
return hex_fpr
1392
2499
1393
2500
1394
2501
class MultiprocessingMixIn(object):
1395
2502
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2503
1396
2504
def sub_process_main(self, request, address):
1397
2505
try:
1398
2506
self.finish_request(request, address)
1399
except:
2507
except Exception:
1400
2508
self.handle_error(request, address)
1401
2509
self.close_request(request)
1402
2510
1403
2511
def process_request(self, request, address):
1404
2512
"""Start a new process to process the request."""
1405
multiprocessing.Process(target = self.sub_process_main,
1406
args = (request, address)).start()
2513
proc = multiprocessing.Process(target=self.sub_process_main,
2514
args=(request, address))
2515
proc.start()
2516
return proc
2517
1407
2518
1408
2519
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1409
2520
""" adds a pipe to the MixIn """
2521
1410
2522
def process_request(self, request, client_address):
1411
2523
"""Overrides and wraps the original process_request().
1412
2524
1413
2525
This function creates a new pipe in self.pipe
1414
2526
"""
1415
2527
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1416
2528
1417
super(MultiprocessingMixInWithPipe,
1418
self).process_request(request, client_address)
2529
proc = MultiprocessingMixIn.process_request(self, request,
2530
client_address)
1419
2531
self.child_pipe.close()
1420
self.add_pipe(parent_pipe)
2532
self.add_pipe(parent_pipe, proc)
1421
2533
1422
def add_pipe(self, parent_pipe):
2534
def add_pipe(self, parent_pipe, proc):
1423
2535
"""Dummy function; override as necessary"""
1424
raise NotImplementedError
2536
raise NotImplementedError()
2537
1425
2538
1426
2539
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1427
2540
socketserver.TCPServer, object):
1428
2541
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1429
2542
1430
2543
Attributes:
1431
2544
enabled: Boolean; whether this server is activated yet
1432
2545
interface: None or a network interface name (string)
1433
2546
use_ipv6: Boolean; to use IPv6 or not
1434
2547
"""
2548
1435
2549
def __init__(self, server_address, RequestHandlerClass,
1436
interface=None, use_ipv6=True):
2550
interface=None,
2551
use_ipv6=True,
2552
socketfd=None):
2553
"""If socketfd is set, use that file descriptor instead of
2554
creating a new one with socket.socket().
2555
"""
1437
2556
self.interface = interface
1438
2557
if use_ipv6:
1439
2558
self.address_family = socket.AF_INET6
2559
if socketfd is not None:
2560
# Save the file descriptor
2561
self.socketfd = socketfd
2562
# Save the original socket.socket() function
2563
self.socket_socket = socket.socket
2564
2565
# To implement --socket, we monkey patch socket.socket.
2566
#
2567
# (When socketserver.TCPServer is a new-style class, we
2568
# could make self.socket into a property instead of monkey
2569
# patching socket.socket.)
2570
#
2571
# Create a one-time-only replacement for socket.socket()
2572
@functools.wraps(socket.socket)
2573
def socket_wrapper(*args, **kwargs):
2574
# Restore original function so subsequent calls are
2575
# not affected.
2576
socket.socket = self.socket_socket
2577
del self.socket_socket
2578
# This time only, return a new socket object from the
2579
# saved file descriptor.
2580
return socket.fromfd(self.socketfd, *args, **kwargs)
2581
# Replace socket.socket() function with wrapper
2582
socket.socket = socket_wrapper
2583
# The socketserver.TCPServer.__init__ will call
2584
# socket.socket(), which might be our replacement,
2585
# socket_wrapper(), if socketfd was set.
1440
2586
socketserver.TCPServer.__init__(self, server_address,
1441
2587
RequestHandlerClass)
2588
1442
2589
def server_bind(self):
1443
2590
"""This overrides the normal server_bind() function
1444
2591
to bind to an interface if one was specified, and also NOT to
1445
2592
bind to an address or port if they were not specified."""
2593
global SO_BINDTODEVICE
1446
2594
if self.interface is not None:
1447
2595
if SO_BINDTODEVICE is None:
1448
logger.error("SO_BINDTODEVICE does not exist;"
1449
" cannot bind to interface %s",
1450
self.interface)
1451
else:
1452
try:
1453
self.socket.setsockopt(socket.SOL_SOCKET,
1454
SO_BINDTODEVICE,
1455
str(self.interface
1456
+ '\0'))
1457
except socket.error as error:
1458
if error[0] == errno.EPERM:
1459
logger.error("No permission to"
1460
" bind to interface %s",
1461
self.interface)
1462
elif error[0] == errno.ENOPROTOOPT:
1463
logger.error("SO_BINDTODEVICE not available;"
1464
" cannot bind to interface %s",
1465
self.interface)
1466
else:
1467
raise
2596
# Fall back to a hard-coded value which seems to be
2597
# common enough.
2598
logger.warning("SO_BINDTODEVICE not found, trying 25")
2599
SO_BINDTODEVICE = 25
2600
try:
2601
self.socket.setsockopt(
2602
socket.SOL_SOCKET, SO_BINDTODEVICE,
2603
(self.interface + "\0").encode("utf-8"))
2604
except socket.error as error:
2605
if error.errno == errno.EPERM:
2606
logger.error("No permission to bind to"
2607
" interface %s", self.interface)
2608
elif error.errno == errno.ENOPROTOOPT:
2609
logger.error("SO_BINDTODEVICE not available;"
2610
" cannot bind to interface %s",
2611
self.interface)
2612
elif error.errno == errno.ENODEV:
2613
logger.error("Interface %s does not exist,"
2614
" cannot bind", self.interface)
2615
else:
2616
raise
1468
2617
# Only bind(2) the socket if we really need to.
1469
2618
if self.server_address[0] or self.server_address[1]:
1470
2619
if not self.server_address[0]:
1471
2620
if self.address_family == socket.AF_INET6:
1472
any_address = "::" # in6addr_any
2621
any_address = "::" # in6addr_any
1473
2622
else:
1474
any_address = socket.INADDR_ANY
2623
any_address = "0.0.0.0" # INADDR_ANY
1475
2624
self.server_address = (any_address,
1476
2625
self.server_address[1])
1477
2626
elif not self.server_address[1]:
1478
self.server_address = (self.server_address[0],
1479
0)
2627
self.server_address = (self.server_address[0], 0)
1480
2628
# if self.interface:
1481
2629
# self.server_address = (self.server_address[0],
1482
2630
# 0, # port
1488
2636
1489
2637
class MandosServer(IPv6_TCPServer):
1490
2638
"""Mandos server.
1491
2639
1492
2640
Attributes:
1493
2641
clients: set of Client objects
1494
2642
gnutls_priority GnuTLS priority string
1495
2643
use_dbus: Boolean; to emit D-Bus signals or not
1496
1497
Assumes a gobject.MainLoop event loop.
2644
2645
Assumes a GLib.MainLoop event loop.
1498
2646
"""
2647
1499
2648
def __init__(self, server_address, RequestHandlerClass,
1500
interface=None, use_ipv6=True, clients=None,
1501
gnutls_priority=None, use_dbus=True):
2649
interface=None,
2650
use_ipv6=True,
2651
clients=None,
2652
gnutls_priority=None,
2653
use_dbus=True,
2654
socketfd=None):
1502
2655
self.enabled = False
1503
2656
self.clients = clients
1504
2657
if self.clients is None:
1505
self.clients = set()
2658
self.clients = {}
1506
2659
self.use_dbus = use_dbus
1507
2660
self.gnutls_priority = gnutls_priority
1508
2661
IPv6_TCPServer.__init__(self, server_address,
1509
2662
RequestHandlerClass,
1510
interface = interface,
1511
use_ipv6 = use_ipv6)
2663
interface=interface,
2664
use_ipv6=use_ipv6,
2665
socketfd=socketfd)
2666
1512
2667
def server_activate(self):
1513
2668
if self.enabled:
1514
2669
return socketserver.TCPServer.server_activate(self)
2670
1515
2671
def enable(self):
1516
2672
self.enabled = True
1517
def add_pipe(self, parent_pipe):
2673
2674
def add_pipe(self, parent_pipe, proc):
1518
2675
# Call "handle_ipc" for both data and EOF events
1519
gobject.io_add_watch(parent_pipe.fileno(),
1520
gobject.IO_IN | gobject.IO_HUP,
1521
functools.partial(self.handle_ipc,
1522
parent_pipe = parent_pipe))
1523
1524
def handle_ipc(self, source, condition, parent_pipe=None,
2676
GLib.io_add_watch(
2677
parent_pipe.fileno(),
2678
GLib.IO_IN | GLib.IO_HUP,
2679
functools.partial(self.handle_ipc,
2680
parent_pipe=parent_pipe,
2681
proc=proc))
2682
2683
def handle_ipc(self, source, condition,
2684
parent_pipe=None,
2685
proc=None,
1525
2686
client_object=None):
1526
condition_names = {
1527
gobject.IO_IN: "IN", # There is data to read.
1528
gobject.IO_OUT: "OUT", # Data can be written (without
1529
# blocking).
1530
gobject.IO_PRI: "PRI", # There is urgent data to read.
1531
gobject.IO_ERR: "ERR", # Error condition.
1532
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1533
# broken, usually for pipes and
1534
# sockets).
1535
}
1536
conditions_string = ' | '.join(name
1537
for cond, name in
1538
condition_names.iteritems()
1539
if cond & condition)
1540
# error or the other end of multiprocessing.Pipe has closed
1541
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2687
# error, or the other end of multiprocessing.Pipe has closed
2688
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2689
# Wait for other process to exit
2690
proc.join()
1542
2691
return False
1543
2692
1544
2693
# Read a request from the child
1545
2694
request = parent_pipe.recv()
1546
2695
command = request[0]
1547
2696
1548
2697
if command == 'init':
1549
fpr = request[1]
1550
address = request[2]
1551
1552
for c in self.clients:
1553
if c.fingerprint == fpr:
2698
key_id = request[1].decode("ascii")
2699
fpr = request[2].decode("ascii")
2700
address = request[3]
2701
2702
for c in self.clients.values():
2703
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2704
continue
2705
if key_id and c.key_id == key_id:
2706
client = c
2707
break
2708
if fpr and c.fingerprint == fpr:
1554
2709
client = c
1555
2710
break
1556
2711
else:
1557
logger.info("Client not found for fingerprint: %s, ad"
1558
"dress: %s", fpr, address)
2712
logger.info("Client not found for key ID: %s, address"
2713
": %s", key_id or fpr, address)
1559
2714
if self.use_dbus:
1560
2715
# Emit D-Bus signal
1561
mandos_dbus_service.ClientNotFound(fpr, address[0])
2716
mandos_dbus_service.ClientNotFound(key_id or fpr,
2717
address[0])
1562
2718
parent_pipe.send(False)
1563
2719
return False
1564
1565
gobject.io_add_watch(parent_pipe.fileno(),
1566
gobject.IO_IN | gobject.IO_HUP,
1567
functools.partial(self.handle_ipc,
1568
parent_pipe = parent_pipe,
1569
client_object = client))
2720
2721
GLib.io_add_watch(
2722
parent_pipe.fileno(),
2723
GLib.IO_IN | GLib.IO_HUP,
2724
functools.partial(self.handle_ipc,
2725
parent_pipe=parent_pipe,
2726
proc=proc,
2727
client_object=client))
1570
2728
parent_pipe.send(True)
1571
# remove the old hook in favor of the new above hook on same fileno
2729
# remove the old hook in favor of the new above hook on
2730
# same fileno
1572
2731
return False
1573
2732
if command == 'funcall':
1574
2733
funcname = request[1]
1575
2734
args = request[2]
1576
2735
kwargs = request[3]
1577
1578
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
2736
2737
parent_pipe.send(('data', getattr(client_object,
2738
funcname)(*args,
2739
**kwargs)))
1579
2740
1580
2741
if command == 'getattr':
1581
2742
attrname = request[1]
1582
if callable(client_object.__getattribute__(attrname)):
1583
parent_pipe.send(('function',))
2743
if isinstance(client_object.__getattribute__(attrname),
2744
collections.Callable):
2745
parent_pipe.send(('function', ))
1584
2746
else:
1585
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1586
2747
parent_pipe.send((
2748
'data', client_object.__getattribute__(attrname)))
2749
1587
2750
if command == 'setattr':
1588
2751
attrname = request[1]
1589
2752
value = request[2]
1592
2755
return True
1593
2756
1594
2757
2758
def rfc3339_duration_to_delta(duration):
2759
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2760
2761
>>> rfc3339_duration_to_delta("P7D")
2762
datetime.timedelta(7)
2763
>>> rfc3339_duration_to_delta("PT60S")
2764
datetime.timedelta(0, 60)
2765
>>> rfc3339_duration_to_delta("PT60M")
2766
datetime.timedelta(0, 3600)
2767
>>> rfc3339_duration_to_delta("PT24H")
2768
datetime.timedelta(1)
2769
>>> rfc3339_duration_to_delta("P1W")
2770
datetime.timedelta(7)
2771
>>> rfc3339_duration_to_delta("PT5M30S")
2772
datetime.timedelta(0, 330)
2773
>>> rfc3339_duration_to_delta("P1DT3M20S")
2774
datetime.timedelta(1, 200)
2775
"""
2776
2777
# Parsing an RFC 3339 duration with regular expressions is not
2778
# possible - there would have to be multiple places for the same
2779
# values, like seconds. The current code, while more esoteric, is
2780
# cleaner without depending on a parsing library. If Python had a
2781
# built-in library for parsing we would use it, but we'd like to
2782
# avoid excessive use of external libraries.
2783
2784
# New type for defining tokens, syntax, and semantics all-in-one
2785
Token = collections.namedtuple("Token", (
2786
"regexp", # To match token; if "value" is not None, must have
2787
# a "group" containing digits
2788
"value", # datetime.timedelta or None
2789
"followers")) # Tokens valid after this token
2790
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2791
# the "duration" ABNF definition in RFC 3339, Appendix A.
2792
token_end = Token(re.compile(r"$"), None, frozenset())
2793
token_second = Token(re.compile(r"(\d+)S"),
2794
datetime.timedelta(seconds=1),
2795
frozenset((token_end, )))
2796
token_minute = Token(re.compile(r"(\d+)M"),
2797
datetime.timedelta(minutes=1),
2798
frozenset((token_second, token_end)))
2799
token_hour = Token(re.compile(r"(\d+)H"),
2800
datetime.timedelta(hours=1),
2801
frozenset((token_minute, token_end)))
2802
token_time = Token(re.compile(r"T"),
2803
None,
2804
frozenset((token_hour, token_minute,
2805
token_second)))
2806
token_day = Token(re.compile(r"(\d+)D"),
2807
datetime.timedelta(days=1),
2808
frozenset((token_time, token_end)))
2809
token_month = Token(re.compile(r"(\d+)M"),
2810
datetime.timedelta(weeks=4),
2811
frozenset((token_day, token_end)))
2812
token_year = Token(re.compile(r"(\d+)Y"),
2813
datetime.timedelta(weeks=52),
2814
frozenset((token_month, token_end)))
2815
token_week = Token(re.compile(r"(\d+)W"),
2816
datetime.timedelta(weeks=1),
2817
frozenset((token_end, )))
2818
token_duration = Token(re.compile(r"P"), None,
2819
frozenset((token_year, token_month,
2820
token_day, token_time,
2821
token_week)))
2822
# Define starting values:
2823
# Value so far
2824
value = datetime.timedelta()
2825
found_token = None
2826
# Following valid tokens
2827
followers = frozenset((token_duration, ))
2828
# String left to parse
2829
s = duration
2830
# Loop until end token is found
2831
while found_token is not token_end:
2832
# Search for any currently valid tokens
2833
for token in followers:
2834
match = token.regexp.match(s)
2835
if match is not None:
2836
# Token found
2837
if token.value is not None:
2838
# Value found, parse digits
2839
factor = int(match.group(1), 10)
2840
# Add to value so far
2841
value += factor * token.value
2842
# Strip token from string
2843
s = token.regexp.sub("", s, 1)
2844
# Go to found token
2845
found_token = token
2846
# Set valid next tokens
2847
followers = found_token.followers
2848
break
2849
else:
2850
# No currently valid tokens were found
2851
raise ValueError("Invalid RFC 3339 duration: {!r}"
2852
.format(duration))
2853
# End token found
2854
return value
2855
2856
1595
2857
def string_to_delta(interval):
1596
2858
"""Parse a string and return a datetime.timedelta
1597
2859
1598
2860
>>> string_to_delta('7d')
1599
2861
datetime.timedelta(7)
1600
2862
>>> string_to_delta('60s')
1608
2870
>>> string_to_delta('5m 30s')
1609
2871
datetime.timedelta(0, 330)
1610
2872
"""
2873
2874
try:
2875
return rfc3339_duration_to_delta(interval)
2876
except ValueError:
2877
pass
2878
1611
2879
timevalue = datetime.timedelta(0)
1612
2880
for s in interval.split():
1613
2881
try:
1614
suffix = unicode(s[-1])
2882
suffix = s[-1]
1615
2883
value = int(s[:-1])
1616
2884
if suffix == "d":
1617
2885
delta = datetime.timedelta(value)
1624
2892
elif suffix == "w":
1625
2893
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1626
2894
else:
1627
raise ValueError("Unknown suffix %r" % suffix)
1628
except (ValueError, IndexError) as e:
2895
raise ValueError("Unknown suffix {!r}".format(suffix))
2896
except IndexError as e:
1629
2897
raise ValueError(*(e.args))
1630
2898
timevalue += delta
1631
2899
return timevalue
1632
2900
1633
2901
1634
def if_nametoindex(interface):
1635
"""Call the C function if_nametoindex(), or equivalent
1636
1637
Note: This function cannot accept a unicode string."""
1638
global if_nametoindex
1639
try:
1640
if_nametoindex = (ctypes.cdll.LoadLibrary
1641
(ctypes.util.find_library("c"))
1642
.if_nametoindex)
1643
except (OSError, AttributeError):
1644
logger.warning("Doing if_nametoindex the hard way")
1645
def if_nametoindex(interface):
1646
"Get an interface index the hard way, i.e. using fcntl()"
1647
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1648
with contextlib.closing(socket.socket()) as s:
1649
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1650
struct.pack(str("16s16x"),
1651
interface))
1652
interface_index = struct.unpack(str("I"),
1653
ifreq[16:20])[0]
1654
return interface_index
1655
return if_nametoindex(interface)
1656
1657
1658
def daemon(nochdir = False, noclose = False):
2902
def daemon(nochdir=False, noclose=False):
1659
2903
"""See daemon(3). Standard BSD Unix function.
1660
2904
1661
2905
This should really exist as os.daemon, but it doesn't (yet)."""
1662
2906
if os.fork():
1663
2907
sys.exit()
1668
2912
sys.exit()
1669
2913
if not noclose:
1670
2914
# Close all standard open file descriptors
1671
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2915
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1672
2916
if not stat.S_ISCHR(os.fstat(null).st_mode):
1673
2917
raise OSError(errno.ENODEV,
1674
"%s not a character device"
1675
% os.path.devnull)
2918
"{} not a character device"
2919
.format(os.devnull))
1676
2920
os.dup2(null, sys.stdin.fileno())
1677
2921
os.dup2(null, sys.stdout.fileno())
1678
2922
os.dup2(null, sys.stderr.fileno())
1681
2925
1682
2926
1683
2927
def main():
1684
2928
1685
2929
##################################################################
1686
2930
# Parsing of options, both command line and config file
1687
2931
1688
2932
parser = argparse.ArgumentParser()
1689
2933
parser.add_argument("-v", "--version", action="version",
1690
version = "%%(prog)s %s" % version,
2934
version="%(prog)s {}".format(version),
1691
2935
help="show version number and exit")
1692
2936
parser.add_argument("-i", "--interface", metavar="IF",
1693
2937
help="Bind to interface IF")
1699
2943
help="Run self-test")
1700
2944
parser.add_argument("--debug", action="store_true",
1701
2945
help="Debug mode; run in foreground and log"
1702
" to terminal")
2946
" to terminal", default=None)
1703
2947
parser.add_argument("--debuglevel", metavar="LEVEL",
1704
2948
help="Debug level for stdout output")
1705
2949
parser.add_argument("--priority", help="GnuTLS"
1712
2956
" files")
1713
2957
parser.add_argument("--no-dbus", action="store_false",
1714
2958
dest="use_dbus", help="Do not provide D-Bus"
1715
" system bus interface")
2959
" system bus interface", default=None)
1716
2960
parser.add_argument("--no-ipv6", action="store_false",
1717
dest="use_ipv6", help="Do not use IPv6")
2961
dest="use_ipv6", help="Do not use IPv6",
2962
default=None)
2963
parser.add_argument("--no-restore", action="store_false",
2964
dest="restore", help="Do not restore stored"
2965
" state", default=None)
2966
parser.add_argument("--socket", type=int,
2967
help="Specify a file descriptor to a network"
2968
" socket to use instead of creating one")
2969
parser.add_argument("--statedir", metavar="DIR",
2970
help="Directory to save/restore state in")
2971
parser.add_argument("--foreground", action="store_true",
2972
help="Run in foreground", default=None)
2973
parser.add_argument("--no-zeroconf", action="store_false",
2974
dest="zeroconf", help="Do not use Zeroconf",
2975
default=None)
2976
1718
2977
options = parser.parse_args()
1719
2978
1720
2979
if options.check:
1721
2980
import doctest
1722
doctest.testmod()
1723
sys.exit()
1724
2981
fail_count, test_count = doctest.testmod()
2982
sys.exit(os.EX_OK if fail_count == 0 else 1)
2983
1725
2984
# Default values for config file for server-global settings
1726
server_defaults = { "interface": "",
1727
"address": "",
1728
"port": "",
1729
"debug": "False",
1730
"priority":
1731
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1732
"servicename": "Mandos",
1733
"use_dbus": "True",
1734
"use_ipv6": "True",
1735
"debuglevel": "",
1736
}
1737
2985
if gnutls.has_rawpk:
2986
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2987
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2988
else:
2989
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2990
":+SIGN-DSA-SHA256")
2991
server_defaults = {"interface": "",
2992
"address": "",
2993
"port": "",
2994
"debug": "False",
2995
"priority": priority,
2996
"servicename": "Mandos",
2997
"use_dbus": "True",
2998
"use_ipv6": "True",
2999
"debuglevel": "",
3000
"restore": "True",
3001
"socket": "",
3002
"statedir": "/var/lib/mandos",
3003
"foreground": "False",
3004
"zeroconf": "True",
3005
}
3006
del priority
3007
1738
3008
# Parse config file for server-global settings
1739
3009
server_config = configparser.SafeConfigParser(server_defaults)
1740
3010
del server_defaults
1741
server_config.read(os.path.join(options.configdir,
1742
"mandos.conf"))
3011
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1743
3012
# Convert the SafeConfigParser object to a dict
1744
3013
server_settings = server_config.defaults()
1745
3014
# Use the appropriate methods on the non-string config options
1746
for option in ("debug", "use_dbus", "use_ipv6"):
3015
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3016
"foreground", "zeroconf"):
1747
3017
server_settings[option] = server_config.getboolean("DEFAULT",
1748
3018
option)
1749
3019
if server_settings["port"]:
1750
3020
server_settings["port"] = server_config.getint("DEFAULT",
1751
3021
"port")
3022
if server_settings["socket"]:
3023
server_settings["socket"] = server_config.getint("DEFAULT",
3024
"socket")
3025
# Later, stdin will, and stdout and stderr might, be dup'ed
3026
# over with an opened os.devnull. But we don't want this to
3027
# happen with a supplied network socket.
3028
if 0 <= server_settings["socket"] <= 2:
3029
server_settings["socket"] = os.dup(server_settings
3030
["socket"])
1752
3031
del server_config
1753
3032
1754
3033
# Override the settings from the config file with command line
1755
3034
# options, if set.
1756
3035
for option in ("interface", "address", "port", "debug",
1757
"priority", "servicename", "configdir",
1758
"use_dbus", "use_ipv6", "debuglevel"):
3036
"priority", "servicename", "configdir", "use_dbus",
3037
"use_ipv6", "debuglevel", "restore", "statedir",
3038
"socket", "foreground", "zeroconf"):
1759
3039
value = getattr(options, option)
1760
3040
if value is not None:
1761
3041
server_settings[option] = value
1762
3042
del options
1763
3043
# Force all strings to be unicode
1764
3044
for option in server_settings.keys():
1765
if type(server_settings[option]) is str:
1766
server_settings[option] = unicode(server_settings[option])
3045
if isinstance(server_settings[option], bytes):
3046
server_settings[option] = (server_settings[option]
3047
.decode("utf-8"))
3048
# Force all boolean options to be boolean
3049
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3050
"foreground", "zeroconf"):
3051
server_settings[option] = bool(server_settings[option])
3052
# Debug implies foreground
3053
if server_settings["debug"]:
3054
server_settings["foreground"] = True
1767
3055
# Now we have our good server settings in "server_settings"
1768
3056
1769
3057
##################################################################
1770
3058
3059
if (not server_settings["zeroconf"]
3060
and not (server_settings["port"]
3061
or server_settings["socket"] != "")):
3062
parser.error("Needs port or socket to work without Zeroconf")
3063
1771
3064
# For convenience
1772
3065
debug = server_settings["debug"]
1773
3066
debuglevel = server_settings["debuglevel"]
1774
3067
use_dbus = server_settings["use_dbus"]
1775
3068
use_ipv6 = server_settings["use_ipv6"]
3069
stored_state_path = os.path.join(server_settings["statedir"],
3070
stored_state_file)
3071
foreground = server_settings["foreground"]
3072
zeroconf = server_settings["zeroconf"]
3073
3074
if debug:
3075
initlogger(debug, logging.DEBUG)
3076
else:
3077
if not debuglevel:
3078
initlogger(debug)
3079
else:
3080
level = getattr(logging, debuglevel.upper())
3081
initlogger(debug, level)
1776
3082
1777
3083
if server_settings["servicename"] != "Mandos":
1778
syslogger.setFormatter(logging.Formatter
1779
('Mandos (%s) [%%(process)d]:'
1780
' %%(levelname)s: %%(message)s'
1781
% server_settings["servicename"]))
1782
3084
syslogger.setFormatter(
3085
logging.Formatter('Mandos ({}) [%(process)d]:'
3086
' %(levelname)s: %(message)s'.format(
3087
server_settings["servicename"])))
3088
1783
3089
# Parse config file with clients
1784
client_defaults = { "timeout": "5m",
1785
"extended_timeout": "15m",
1786
"interval": "2m",
1787
"checker": "fping -q -- %%(host)s",
1788
"host": "",
1789
"approval_delay": "0s",
1790
"approval_duration": "1s",
1791
}
1792
client_config = configparser.SafeConfigParser(client_defaults)
3090
client_config = configparser.SafeConfigParser(Client
3091
.client_defaults)
1793
3092
client_config.read(os.path.join(server_settings["configdir"],
1794
3093
"clients.conf"))
1795
3094
1796
3095
global mandos_dbus_service
1797
3096
mandos_dbus_service = None
1798
1799
tcp_server = MandosServer((server_settings["address"],
1800
server_settings["port"]),
1801
ClientHandler,
1802
interface=(server_settings["interface"]
1803
or None),
1804
use_ipv6=use_ipv6,
1805
gnutls_priority=
1806
server_settings["priority"],
1807
use_dbus=use_dbus)
1808
if not debug:
1809
pidfilename = "/var/run/mandos.pid"
1810
try:
1811
pidfile = open(pidfilename, "w")
1812
except IOError:
1813
logger.error("Could not open file %r", pidfilename)
1814
1815
try:
1816
uid = pwd.getpwnam("_mandos").pw_uid
1817
gid = pwd.getpwnam("_mandos").pw_gid
1818
except KeyError:
1819
try:
1820
uid = pwd.getpwnam("mandos").pw_uid
1821
gid = pwd.getpwnam("mandos").pw_gid
3097
3098
socketfd = None
3099
if server_settings["socket"] != "":
3100
socketfd = server_settings["socket"]
3101
tcp_server = MandosServer(
3102
(server_settings["address"], server_settings["port"]),
3103
ClientHandler,
3104
interface=(server_settings["interface"] or None),
3105
use_ipv6=use_ipv6,
3106
gnutls_priority=server_settings["priority"],
3107
use_dbus=use_dbus,
3108
socketfd=socketfd)
3109
if not foreground:
3110
pidfilename = "/run/mandos.pid"
3111
if not os.path.isdir("/run/."):
3112
pidfilename = "/var/run/mandos.pid"
3113
pidfile = None
3114
try:
3115
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3116
except IOError as e:
3117
logger.error("Could not open file %r", pidfilename,
3118
exc_info=e)
3119
3120
for name, group in (("_mandos", "_mandos"),
3121
("mandos", "mandos"),
3122
("nobody", "nogroup")):
3123
try:
3124
uid = pwd.getpwnam(name).pw_uid
3125
gid = pwd.getpwnam(group).pw_gid
3126
break
1822
3127
except KeyError:
1823
try:
1824
uid = pwd.getpwnam("nobody").pw_uid
1825
gid = pwd.getpwnam("nobody").pw_gid
1826
except KeyError:
1827
uid = 65534
1828
gid = 65534
3128
continue
3129
else:
3130
uid = 65534
3131
gid = 65534
1829
3132
try:
1830
3133
os.setgid(gid)
1831
3134
os.setuid(uid)
3135
if debug:
3136
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3137
gid))
1832
3138
except OSError as error:
1833
if error[0] != errno.EPERM:
1834
raise error
1835
1836
if not debug and not debuglevel:
1837
syslogger.setLevel(logging.WARNING)
1838
console.setLevel(logging.WARNING)
1839
if debuglevel:
1840
level = getattr(logging, debuglevel.upper())
1841
syslogger.setLevel(level)
1842
console.setLevel(level)
3139
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3140
.format(uid, gid, os.strerror(error.errno)))
3141
if error.errno != errno.EPERM:
3142
raise
1843
3143
1844
3144
if debug:
1845
3145
# Enable all possible GnuTLS debugging
1846
3146
1847
3147
# "Use a log level over 10 to enable all debugging options."
1848
3148
# - GnuTLS manual
1849
gnutls.library.functions.gnutls_global_set_log_level(11)
1850
1851
@gnutls.library.types.gnutls_log_func
3149
gnutls.global_set_log_level(11)
3150
3151
@gnutls.log_func
1852
3152
def debug_gnutls(level, string):
1853
3153
logger.debug("GnuTLS: %s", string[:-1])
1854
1855
(gnutls.library.functions
1856
.gnutls_global_set_log_function(debug_gnutls))
1857
3154
3155
gnutls.global_set_log_function(debug_gnutls)
3156
1858
3157
# Redirect stdin so all checkers get /dev/null
1859
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3158
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1860
3159
os.dup2(null, sys.stdin.fileno())
1861
3160
if null > 2:
1862
3161
os.close(null)
1863
else:
1864
# No console logging
1865
logger.removeHandler(console)
1866
3162
1867
3163
# Need to fork before connecting to D-Bus
1868
if not debug:
3164
if not foreground:
1869
3165
# Close all input and output, do double fork, etc.
1870
3166
daemon()
1871
3167
3168
# multiprocessing will use threads, so before we use GLib we need
3169
# to inform GLib that threads will be used.
3170
GLib.threads_init()
3171
1872
3172
global main_loop
1873
3173
# From the Avahi example code
1874
DBusGMainLoop(set_as_default=True )
1875
main_loop = gobject.MainLoop()
3174
DBusGMainLoop(set_as_default=True)
3175
main_loop = GLib.MainLoop()
1876
3176
bus = dbus.SystemBus()
1877
3177
# End of Avahi example code
1878
3178
if use_dbus:
1879
3179
try:
1880
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1881
bus, do_not_queue=True)
1882
except dbus.exceptions.NameExistsException as e:
1883
logger.error(unicode(e) + ", disabling D-Bus")
3180
bus_name = dbus.service.BusName("se.recompile.Mandos",
3181
bus,
3182
do_not_queue=True)
3183
old_bus_name = dbus.service.BusName(
3184
"se.bsnet.fukt.Mandos", bus,
3185
do_not_queue=True)
3186
except dbus.exceptions.DBusException as e:
3187
logger.error("Disabling D-Bus:", exc_info=e)
1884
3188
use_dbus = False
1885
3189
server_settings["use_dbus"] = False
1886
3190
tcp_server.use_dbus = False
1887
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1888
service = AvahiService(name = server_settings["servicename"],
1889
servicetype = "_mandos._tcp",
1890
protocol = protocol, bus = bus)
1891
if server_settings["interface"]:
1892
service.interface = (if_nametoindex
1893
(str(server_settings["interface"])))
1894
3191
if zeroconf:
3192
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3193
service = AvahiServiceToSyslog(
3194
name=server_settings["servicename"],
3195
servicetype="_mandos._tcp",
3196
protocol=protocol,
3197
bus=bus)
3198
if server_settings["interface"]:
3199
service.interface = if_nametoindex(
3200
server_settings["interface"].encode("utf-8"))
3201
1895
3202
global multiprocessing_manager
1896
3203
multiprocessing_manager = multiprocessing.Manager()
1897
3204
1898
3205
client_class = Client
1899
3206
if use_dbus:
1900
client_class = functools.partial(ClientDBus, bus = bus)
1901
def client_config_items(config, section):
1902
special_settings = {
1903
"approved_by_default":
1904
lambda: config.getboolean(section,
1905
"approved_by_default"),
1906
}
1907
for name, value in config.items(section):
3207
client_class = functools.partial(ClientDBus, bus=bus)
3208
3209
client_settings = Client.config_parser(client_config)
3210
old_client_settings = {}
3211
clients_data = {}
3212
3213
# This is used to redirect stdout and stderr for checker processes
3214
global wnull
3215
wnull = open(os.devnull, "w") # A writable /dev/null
3216
# Only used if server is running in foreground but not in debug
3217
# mode
3218
if debug or not foreground:
3219
wnull.close()
3220
3221
# Get client data and settings from last running state.
3222
if server_settings["restore"]:
3223
try:
3224
with open(stored_state_path, "rb") as stored_state:
3225
if sys.version_info.major == 2:
3226
clients_data, old_client_settings = pickle.load(
3227
stored_state)
3228
else:
3229
bytes_clients_data, bytes_old_client_settings = (
3230
pickle.load(stored_state, encoding="bytes"))
3231
# Fix bytes to strings
3232
# clients_data
3233
# .keys()
3234
clients_data = {(key.decode("utf-8")
3235
if isinstance(key, bytes)
3236
else key): value
3237
for key, value in
3238
bytes_clients_data.items()}
3239
del bytes_clients_data
3240
for key in clients_data:
3241
value = {(k.decode("utf-8")
3242
if isinstance(k, bytes) else k): v
3243
for k, v in
3244
clients_data[key].items()}
3245
clients_data[key] = value
3246
# .client_structure
3247
value["client_structure"] = [
3248
(s.decode("utf-8")
3249
if isinstance(s, bytes)
3250
else s) for s in
3251
value["client_structure"]]
3252
# .name & .host
3253
for k in ("name", "host"):
3254
if isinstance(value[k], bytes):
3255
value[k] = value[k].decode("utf-8")
3256
if not value.has_key("key_id"):
3257
value["key_id"] = ""
3258
elif not value.has_key("fingerprint"):
3259
value["fingerprint"] = ""
3260
# old_client_settings
3261
# .keys()
3262
old_client_settings = {
3263
(key.decode("utf-8")
3264
if isinstance(key, bytes)
3265
else key): value
3266
for key, value in
3267
bytes_old_client_settings.items()}
3268
del bytes_old_client_settings
3269
# .host
3270
for value in old_client_settings.values():
3271
if isinstance(value["host"], bytes):
3272
value["host"] = (value["host"]
3273
.decode("utf-8"))
3274
os.remove(stored_state_path)
3275
except IOError as e:
3276
if e.errno == errno.ENOENT:
3277
logger.warning("Could not load persistent state:"
3278
" {}".format(os.strerror(e.errno)))
3279
else:
3280
logger.critical("Could not load persistent state:",
3281
exc_info=e)
3282
raise
3283
except EOFError as e:
3284
logger.warning("Could not load persistent state: "
3285
"EOFError:",
3286
exc_info=e)
3287
3288
with PGPEngine() as pgp:
3289
for client_name, client in clients_data.items():
3290
# Skip removed clients
3291
if client_name not in client_settings:
3292
continue
3293
3294
# Decide which value to use after restoring saved state.
3295
# We have three different values: Old config file,
3296
# new config file, and saved state.
3297
# New config value takes precedence if it differs from old
3298
# config value, otherwise use saved state.
3299
for name, value in client_settings[client_name].items():
3300
try:
3301
# For each value in new config, check if it
3302
# differs from the old config value (Except for
3303
# the "secret" attribute)
3304
if (name != "secret"
3305
and (value !=
3306
old_client_settings[client_name][name])):
3307
client[name] = value
3308
except KeyError:
3309
pass
3310
3311
# Clients who has passed its expire date can still be
3312
# enabled if its last checker was successful. A Client
3313
# whose checker succeeded before we stored its state is
3314
# assumed to have successfully run all checkers during
3315
# downtime.
3316
if client["enabled"]:
3317
if datetime.datetime.utcnow() >= client["expires"]:
3318
if not client["last_checked_ok"]:
3319
logger.warning(
3320
"disabling client {} - Client never "
3321
"performed a successful checker".format(
3322
client_name))
3323
client["enabled"] = False
3324
elif client["last_checker_status"] != 0:
3325
logger.warning(
3326
"disabling client {} - Client last"
3327
" checker failed with error code"
3328
" {}".format(
3329
client_name,
3330
client["last_checker_status"]))
3331
client["enabled"] = False
3332
else:
3333
client["expires"] = (
3334
datetime.datetime.utcnow()
3335
+ client["timeout"])
3336
logger.debug("Last checker succeeded,"
3337
" keeping {} enabled".format(
3338
client_name))
1908
3339
try:
1909
yield (name, special_settings[name]())
1910
except KeyError:
1911
yield (name, value)
1912
1913
tcp_server.clients.update(set(
1914
client_class(name = section,
1915
config= dict(client_config_items(
1916
client_config, section)))
1917
for section in client_config.sections()))
3340
client["secret"] = pgp.decrypt(
3341
client["encrypted_secret"],
3342
client_settings[client_name]["secret"])
3343
except PGPError:
3344
# If decryption fails, we use secret from new settings
3345
logger.debug("Failed to decrypt {} old secret".format(
3346
client_name))
3347
client["secret"] = (client_settings[client_name]
3348
["secret"])
3349
3350
# Add/remove clients based on new changes made to config
3351
for client_name in (set(old_client_settings)
3352
- set(client_settings)):
3353
del clients_data[client_name]
3354
for client_name in (set(client_settings)
3355
- set(old_client_settings)):
3356
clients_data[client_name] = client_settings[client_name]
3357
3358
# Create all client objects
3359
for client_name, client in clients_data.items():
3360
tcp_server.clients[client_name] = client_class(
3361
name=client_name,
3362
settings=client,
3363
server_settings=server_settings)
3364
1918
3365
if not tcp_server.clients:
1919
3366
logger.warning("No clients defined")
1920
1921
if not debug:
1922
try:
1923
with pidfile:
1924
pid = os.getpid()
1925
pidfile.write(str(pid) + "\n".encode("utf-8"))
1926
del pidfile
1927
except IOError:
1928
logger.error("Could not write to file %r with PID %d",
1929
pidfilename, pid)
1930
except NameError:
1931
# "pidfile" was never created
1932
pass
3367
3368
if not foreground:
3369
if pidfile is not None:
3370
pid = os.getpid()
3371
try:
3372
with pidfile:
3373
print(pid, file=pidfile)
3374
except IOError:
3375
logger.error("Could not write to file %r with PID %d",
3376
pidfilename, pid)
3377
del pidfile
1933
3378
del pidfilename
1934
1935
signal.signal(signal.SIGINT, signal.SIG_IGN)
1936
1937
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1938
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1939
3379
3380
for termsig in (signal.SIGHUP, signal.SIGTERM):
3381
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3382
lambda: main_loop.quit() and False)
3383
1940
3384
if use_dbus:
1941
class MandosDBusService(dbus.service.Object):
3385
3386
@alternate_dbus_interfaces(
3387
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3388
class MandosDBusService(DBusObjectWithObjectManager):
1942
3389
"""A D-Bus proxy object"""
3390
1943
3391
def __init__(self):
1944
3392
dbus.service.Object.__init__(self, bus, "/")
1945
_interface = "se.bsnet.fukt.Mandos"
1946
3393
3394
_interface = "se.recompile.Mandos"
3395
1947
3396
@dbus.service.signal(_interface, signature="o")
1948
3397
def ClientAdded(self, objpath):
1949
3398
"D-Bus signal"
1950
3399
pass
1951
3400
1952
3401
@dbus.service.signal(_interface, signature="ss")
1953
def ClientNotFound(self, fingerprint, address):
3402
def ClientNotFound(self, key_id, address):
1954
3403
"D-Bus signal"
1955
3404
pass
1956
3405
3406
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3407
"true"})
1957
3408
@dbus.service.signal(_interface, signature="os")
1958
3409
def ClientRemoved(self, objpath, name):
1959
3410
"D-Bus signal"
1960
3411
pass
1961
3412
3413
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3414
"true"})
1962
3415
@dbus.service.method(_interface, out_signature="ao")
1963
3416
def GetAllClients(self):
1964
3417
"D-Bus method"
1965
return dbus.Array(c.dbus_object_path
1966
for c in tcp_server.clients)
1967
3418
return dbus.Array(c.dbus_object_path for c in
3419
tcp_server.clients.values())
3420
3421
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3422
"true"})
1968
3423
@dbus.service.method(_interface,
1969
3424
out_signature="a{oa{sv}}")
1970
3425
def GetAllClientsWithProperties(self):
1971
3426
"D-Bus method"
1972
3427
return dbus.Dictionary(
1973
((c.dbus_object_path, c.GetAll(""))
1974
for c in tcp_server.clients),
3428
{c.dbus_object_path: c.GetAll(
3429
"se.recompile.Mandos.Client")
3430
for c in tcp_server.clients.values()},
1975
3431
signature="oa{sv}")
1976
3432
1977
3433
@dbus.service.method(_interface, in_signature="o")
1978
3434
def RemoveClient(self, object_path):
1979
3435
"D-Bus method"
1980
for c in tcp_server.clients:
3436
for c in tcp_server.clients.values():
1981
3437
if c.dbus_object_path == object_path:
1982
tcp_server.clients.remove(c)
3438
del tcp_server.clients[c.name]
1983
3439
c.remove_from_connection()
1984
# Don't signal anything except ClientRemoved
3440
# Don't signal the disabling
1985
3441
c.disable(quiet=True)
1986
# Emit D-Bus signal
1987
self.ClientRemoved(object_path, c.name)
3442
# Emit D-Bus signal for removal
3443
self.client_removed_signal(c)
1988
3444
return
1989
3445
raise KeyError(object_path)
1990
3446
1991
3447
del _interface
1992
3448
3449
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3450
out_signature="a{oa{sa{sv}}}")
3451
def GetManagedObjects(self):
3452
"""D-Bus method"""
3453
return dbus.Dictionary(
3454
{client.dbus_object_path:
3455
dbus.Dictionary(
3456
{interface: client.GetAll(interface)
3457
for interface in
3458
client._get_all_interface_names()})
3459
for client in tcp_server.clients.values()})
3460
3461
def client_added_signal(self, client):
3462
"""Send the new standard signal and the old signal"""
3463
if use_dbus:
3464
# New standard signal
3465
self.InterfacesAdded(
3466
client.dbus_object_path,
3467
dbus.Dictionary(
3468
{interface: client.GetAll(interface)
3469
for interface in
3470
client._get_all_interface_names()}))
3471
# Old signal
3472
self.ClientAdded(client.dbus_object_path)
3473
3474
def client_removed_signal(self, client):
3475
"""Send the new standard signal and the old signal"""
3476
if use_dbus:
3477
# New standard signal
3478
self.InterfacesRemoved(
3479
client.dbus_object_path,
3480
client._get_all_interface_names())
3481
# Old signal
3482
self.ClientRemoved(client.dbus_object_path,
3483
client.name)
3484
1993
3485
mandos_dbus_service = MandosDBusService()
1994
3486
3487
# Save modules to variables to exempt the modules from being
3488
# unloaded before the function registered with atexit() is run.
3489
mp = multiprocessing
3490
wn = wnull
3491
1995
3492
def cleanup():
1996
3493
"Cleanup function; run on exit"
1997
service.cleanup()
1998
3494
if zeroconf:
3495
service.cleanup()
3496
3497
mp.active_children()
3498
wn.close()
3499
if not (tcp_server.clients or client_settings):
3500
return
3501
3502
# Store client before exiting. Secrets are encrypted with key
3503
# based on what config file has. If config file is
3504
# removed/edited, old secret will thus be unrecovable.
3505
clients = {}
3506
with PGPEngine() as pgp:
3507
for client in tcp_server.clients.values():
3508
key = client_settings[client.name]["secret"]
3509
client.encrypted_secret = pgp.encrypt(client.secret,
3510
key)
3511
client_dict = {}
3512
3513
# A list of attributes that can not be pickled
3514
# + secret.
3515
exclude = {"bus", "changedstate", "secret",
3516
"checker", "server_settings"}
3517
for name, typ in inspect.getmembers(dbus.service
3518
.Object):
3519
exclude.add(name)
3520
3521
client_dict["encrypted_secret"] = (client
3522
.encrypted_secret)
3523
for attr in client.client_structure:
3524
if attr not in exclude:
3525
client_dict[attr] = getattr(client, attr)
3526
3527
clients[client.name] = client_dict
3528
del client_settings[client.name]["secret"]
3529
3530
try:
3531
with tempfile.NamedTemporaryFile(
3532
mode='wb',
3533
suffix=".pickle",
3534
prefix='clients-',
3535
dir=os.path.dirname(stored_state_path),
3536
delete=False) as stored_state:
3537
pickle.dump((clients, client_settings), stored_state,
3538
protocol=2)
3539
tempname = stored_state.name
3540
os.rename(tempname, stored_state_path)
3541
except (IOError, OSError) as e:
3542
if not debug:
3543
try:
3544
os.remove(tempname)
3545
except NameError:
3546
pass
3547
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3548
logger.warning("Could not save persistent state: {}"
3549
.format(os.strerror(e.errno)))
3550
else:
3551
logger.warning("Could not save persistent state:",
3552
exc_info=e)
3553
raise
3554
3555
# Delete all clients, and settings from config
1999
3556
while tcp_server.clients:
2000
client = tcp_server.clients.pop()
3557
name, client = tcp_server.clients.popitem()
2001
3558
if use_dbus:
2002
3559
client.remove_from_connection()
2003
client.disable_hook = None
2004
# Don't signal anything except ClientRemoved
3560
# Don't signal the disabling
2005
3561
client.disable(quiet=True)
3562
# Emit D-Bus signal for removal
2006
3563
if use_dbus:
2007
# Emit D-Bus signal
2008
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2009
client.name)
2010
3564
mandos_dbus_service.client_removed_signal(client)
3565
client_settings.clear()
3566
2011
3567
atexit.register(cleanup)
2012
2013
for client in tcp_server.clients:
3568
3569
for client in tcp_server.clients.values():
2014
3570
if use_dbus:
2015
# Emit D-Bus signal
2016
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2017
client.enable()
2018
3571
# Emit D-Bus signal for adding
3572
mandos_dbus_service.client_added_signal(client)
3573
# Need to initiate checking of clients
3574
if client.enabled:
3575
client.init_checker()
3576
2019
3577
tcp_server.enable()
2020
3578
tcp_server.server_activate()
2021
3579
2022
3580
# Find out what port we got
2023
service.port = tcp_server.socket.getsockname()[1]
3581
if zeroconf:
3582
service.port = tcp_server.socket.getsockname()[1]
2024
3583
if use_ipv6:
2025
3584
logger.info("Now listening on address %r, port %d,"
2026
" flowinfo %d, scope_id %d"
2027
% tcp_server.socket.getsockname())
3585
" flowinfo %d, scope_id %d",
3586
*tcp_server.socket.getsockname())
2028
3587
else: # IPv4
2029
logger.info("Now listening on address %r, port %d"
2030
% tcp_server.socket.getsockname())
2031
2032
#service.interface = tcp_server.socket.getsockname()[3]
2033
3588
logger.info("Now listening on address %r, port %d",
3589
*tcp_server.socket.getsockname())
3590
3591
# service.interface = tcp_server.socket.getsockname()[3]
3592
2034
3593
try:
2035
# From the Avahi example code
2036
try:
2037
service.activate()
2038
except dbus.exceptions.DBusException as error:
2039
logger.critical("DBusException: %s", error)
2040
cleanup()
2041
sys.exit(1)
2042
# End of Avahi example code
2043
2044
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2045
lambda *args, **kwargs:
2046
(tcp_server.handle_request
2047
(*args[2:], **kwargs) or True))
2048
3594
if zeroconf:
3595
# From the Avahi example code
3596
try:
3597
service.activate()
3598
except dbus.exceptions.DBusException as error:
3599
logger.critical("D-Bus Exception", exc_info=error)
3600
cleanup()
3601
sys.exit(1)
3602
# End of Avahi example code
3603
3604
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3605
lambda *args, **kwargs:
3606
(tcp_server.handle_request
3607
(*args[2:], **kwargs) or True))
3608
2049
3609
logger.debug("Starting main loop")
2050
3610
main_loop.run()
2051
3611
except AvahiError as error:
2052
logger.critical("AvahiError: %s", error)
3612
logger.critical("Avahi Error", exc_info=error)
2053
3613
cleanup()
2054
3614
sys.exit(1)
2055
3615
except KeyboardInterrupt:
2060
3620
# Must run before the D-Bus bus name gets deregistered
2061
3621
cleanup()
2062
3622
3623
2063
3624
if __name__ == '__main__':
2064
3625
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0