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- Committer: Teddy Hogeborn
- Date: 2019-04-09 19:41:53 UTC
- mfrom: (1099 trunk)
- mto: This revision was merged to the branch mainline in revision 1100.
- Revision ID: teddy@recompile.se-20190409194153-khftfvj3ee27md1a
Merge from trunk
- 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
#
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# Mandos server - give out binary blobs to connecting clients.
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#
5
#
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# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
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8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
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# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
14
# Copyright © 2008-2019 Teddy Hogeborn
15
# Copyright © 2008-2019 Björn Påhlsson
16
#
17
# This file is part of Mandos.
18
#
19
# Mandos is free software: you can redistribute it and/or modify it
20
# under the terms of the GNU General Public License as published by
19
21
# the Free Software Foundation, either version 3 of the License, or
20
22
# (at your option) any later version.
21
23
#
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
24
26
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
27
# GNU General Public License for more details.
26
#
28
#
27
29
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
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#
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# Contact the authors at <mandos@recompile.se>.
32
#
33
#
33
34
34
35
from __future__ import (division, absolute_import, print_function,
35
36
unicode_literals)
36
37
37
import SocketServer as socketserver
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
38
47
import socket
39
48
import argparse
40
49
import datetime
41
50
import errno
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
49
55
import sys
50
56
import re
51
57
import os
60
66
import struct
61
67
import fcntl
62
68
import functools
63
import cPickle as pickle
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
64
73
import multiprocessing
65
74
import types
75
import binascii
76
import tempfile
77
import itertools
78
import collections
79
import codecs
66
80
67
81
import dbus
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82
import dbus.service
69
import gobject
70
import avahi
83
from gi.repository import GLib
71
84
from dbus.mainloop.glib import DBusGMainLoop
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85
import ctypes
73
86
import ctypes.util
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87
import xml.dom.minidom
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import inspect
76
89
90
# Try to find the value of SO_BINDTODEVICE:
77
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:
78
94
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
79
95
except AttributeError:
80
96
try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
81
99
from IN import SO_BINDTODEVICE
82
100
except ImportError:
83
SO_BINDTODEVICE = None
84
85
86
version = "1.3.1"
87
88
#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
95
' %(message)s'))
96
logger.addHandler(syslogger)
97
98
console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
100
' %(levelname)s:'
101
' %(message)s'))
102
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
IF_UNSPEC = -1 # avahi-common/address.h
281
PROTO_UNSPEC = -1 # avahi-common/address.h
282
PROTO_INET = 0 # avahi-common/address.h
283
PROTO_INET6 = 1 # avahi-common/address.h
284
DBUS_NAME = "org.freedesktop.Avahi"
285
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
286
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
287
DBUS_PATH_SERVER = "/"
288
289
@staticmethod
290
def string_array_to_txt_array(t):
291
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
for s in t), signature="ay")
293
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
294
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
295
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
296
SERVER_INVALID = 0 # avahi-common/defs.h
297
SERVER_REGISTERING = 1 # avahi-common/defs.h
298
SERVER_RUNNING = 2 # avahi-common/defs.h
299
SERVER_COLLISION = 3 # avahi-common/defs.h
300
SERVER_FAILURE = 4 # avahi-common/defs.h
301
103
302
104
303
class AvahiError(Exception):
105
304
def __init__(self, value, *args, **kwargs):
106
305
self.value = value
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
306
return super(AvahiError, self).__init__(value, *args,
307
**kwargs)
308
110
309
111
310
class AvahiServiceError(AvahiError):
112
311
pass
113
312
313
114
314
class AvahiGroupError(AvahiError):
115
315
pass
116
316
117
317
118
318
class AvahiService(object):
119
319
"""An Avahi (Zeroconf) service.
120
320
121
321
Attributes:
122
322
interface: integer; avahi.IF_UNSPEC or an interface index.
123
323
Used to optionally bind to the specified interface.
124
324
name: string; Example: 'Mandos'
125
325
type: string; Example: '_mandos._tcp'.
126
See <http://www.dns-sd.org/ServiceTypes.html>
326
See <https://www.iana.org/assignments/service-names-port-numbers>
127
327
port: integer; what port to announce
128
328
TXT: list of strings; TXT record for the service
129
329
domain: string; Domain to publish on, default to .local if empty.
135
335
server: D-Bus Server
136
336
bus: dbus.SystemBus()
137
337
"""
138
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
139
servicetype = None, port = None, TXT = None,
140
domain = "", host = "", max_renames = 32768,
141
protocol = avahi.PROTO_UNSPEC, bus = None):
338
339
def __init__(self,
340
interface=avahi.IF_UNSPEC,
341
name=None,
342
servicetype=None,
343
port=None,
344
TXT=None,
345
domain="",
346
host="",
347
max_renames=32768,
348
protocol=avahi.PROTO_UNSPEC,
349
bus=None):
142
350
self.interface = interface
143
351
self.name = name
144
352
self.type = servicetype
153
361
self.server = None
154
362
self.bus = bus
155
363
self.entry_group_state_changed_match = None
156
def rename(self):
364
365
def rename(self, remove=True):
157
366
"""Derived from the Avahi example code"""
158
367
if self.rename_count >= self.max_renames:
159
368
logger.critical("No suitable Zeroconf service name found"
160
369
" after %i retries, exiting.",
161
370
self.rename_count)
162
371
raise AvahiServiceError("Too many renames")
163
self.name = unicode(self.server
164
.GetAlternativeServiceName(self.name))
372
self.name = str(
373
self.server.GetAlternativeServiceName(self.name))
374
self.rename_count += 1
165
375
logger.info("Changing Zeroconf service name to %r ...",
166
376
self.name)
167
syslogger.setFormatter(logging.Formatter
168
('Mandos (%s) [%%(process)d]:'
169
' %%(levelname)s: %%(message)s'
170
% self.name))
171
self.remove()
377
if remove:
378
self.remove()
172
379
try:
173
380
self.add()
174
381
except dbus.exceptions.DBusException as error:
175
logger.critical("DBusException: %s", error)
176
self.cleanup()
177
os._exit(1)
178
self.rename_count += 1
382
if (error.get_dbus_name()
383
== "org.freedesktop.Avahi.CollisionError"):
384
logger.info("Local Zeroconf service name collision.")
385
return self.rename(remove=False)
386
else:
387
logger.critical("D-Bus Exception", exc_info=error)
388
self.cleanup()
389
os._exit(1)
390
179
391
def remove(self):
180
392
"""Derived from the Avahi example code"""
181
393
if self.entry_group_state_changed_match is not None:
183
395
self.entry_group_state_changed_match = None
184
396
if self.group is not None:
185
397
self.group.Reset()
398
186
399
def add(self):
187
400
"""Derived from the Avahi example code"""
188
401
self.remove()
193
406
avahi.DBUS_INTERFACE_ENTRY_GROUP)
194
407
self.entry_group_state_changed_match = (
195
408
self.group.connect_to_signal(
196
'StateChanged', self .entry_group_state_changed))
409
'StateChanged', self.entry_group_state_changed))
197
410
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
198
411
self.name, self.type)
199
412
self.group.AddService(
205
418
dbus.UInt16(self.port),
206
419
avahi.string_array_to_txt_array(self.TXT))
207
420
self.group.Commit()
421
208
422
def entry_group_state_changed(self, state, error):
209
423
"""Derived from the Avahi example code"""
210
424
logger.debug("Avahi entry group state change: %i", state)
211
425
212
426
if state == avahi.ENTRY_GROUP_ESTABLISHED:
213
427
logger.debug("Zeroconf service established.")
214
428
elif state == avahi.ENTRY_GROUP_COLLISION:
216
430
self.rename()
217
431
elif state == avahi.ENTRY_GROUP_FAILURE:
218
432
logger.critical("Avahi: Error in group state changed %s",
219
unicode(error))
220
raise AvahiGroupError("State changed: %s"
221
% unicode(error))
433
str(error))
434
raise AvahiGroupError("State changed: {!s}".format(error))
435
222
436
def cleanup(self):
223
437
"""Derived from the Avahi example code"""
224
438
if self.group is not None:
225
439
try:
226
440
self.group.Free()
227
441
except (dbus.exceptions.UnknownMethodException,
228
dbus.exceptions.DBusException) as e:
442
dbus.exceptions.DBusException):
229
443
pass
230
444
self.group = None
231
445
self.remove()
446
232
447
def server_state_changed(self, state, error=None):
233
448
"""Derived from the Avahi example code"""
234
449
logger.debug("Avahi server state change: %i", state)
235
bad_states = { avahi.SERVER_INVALID:
236
"Zeroconf server invalid",
237
avahi.SERVER_REGISTERING: None,
238
avahi.SERVER_COLLISION:
239
"Zeroconf server name collision",
240
avahi.SERVER_FAILURE:
241
"Zeroconf server failure" }
450
bad_states = {
451
avahi.SERVER_INVALID: "Zeroconf server invalid",
452
avahi.SERVER_REGISTERING: None,
453
avahi.SERVER_COLLISION: "Zeroconf server name collision",
454
avahi.SERVER_FAILURE: "Zeroconf server failure",
455
}
242
456
if state in bad_states:
243
457
if bad_states[state] is not None:
244
458
if error is None:
247
461
logger.error(bad_states[state] + ": %r", error)
248
462
self.cleanup()
249
463
elif state == avahi.SERVER_RUNNING:
250
self.add()
464
try:
465
self.add()
466
except dbus.exceptions.DBusException as error:
467
if (error.get_dbus_name()
468
== "org.freedesktop.Avahi.CollisionError"):
469
logger.info("Local Zeroconf service name"
470
" collision.")
471
return self.rename(remove=False)
472
else:
473
logger.critical("D-Bus Exception", exc_info=error)
474
self.cleanup()
475
os._exit(1)
251
476
else:
252
477
if error is None:
253
478
logger.debug("Unknown state: %r", state)
254
479
else:
255
480
logger.debug("Unknown state: %r: %r", state, error)
481
256
482
def activate(self):
257
483
"""Derived from the Avahi example code"""
258
484
if self.server is None:
262
488
follow_name_owner_changes=True),
263
489
avahi.DBUS_INTERFACE_SERVER)
264
490
self.server.connect_to_signal("StateChanged",
265
self.server_state_changed)
491
self.server_state_changed)
266
492
self.server_state_changed(self.server.GetState())
267
493
268
494
269
def _timedelta_to_milliseconds(td):
270
"Convert a datetime.timedelta() to milliseconds"
271
return ((td.days * 24 * 60 * 60 * 1000)
272
+ (td.seconds * 1000)
273
+ (td.microseconds // 1000))
274
495
class AvahiServiceToSyslog(AvahiService):
496
def rename(self, *args, **kwargs):
497
"""Add the new name to the syslog messages"""
498
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
499
syslogger.setFormatter(logging.Formatter(
500
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
501
.format(self.name)))
502
return ret
503
504
505
# Pretend that we have a GnuTLS module
506
class gnutls(object):
507
"""This isn't so much a class as it is a module-like namespace."""
508
509
library = ctypes.util.find_library("gnutls")
510
if library is None:
511
library = ctypes.util.find_library("gnutls-deb0")
512
_library = ctypes.cdll.LoadLibrary(library)
513
del library
514
515
# Unless otherwise indicated, the constants and types below are
516
# all from the gnutls/gnutls.h C header file.
517
518
# Constants
519
E_SUCCESS = 0
520
E_INTERRUPTED = -52
521
E_AGAIN = -28
522
CRT_OPENPGP = 2
523
CRT_RAWPK = 3
524
CLIENT = 2
525
SHUT_RDWR = 0
526
CRD_CERTIFICATE = 1
527
E_NO_CERTIFICATE_FOUND = -49
528
X509_FMT_DER = 0
529
NO_TICKETS = 1<<10
530
ENABLE_RAWPK = 1<<18
531
CTYPE_PEERS = 3
532
KEYID_USE_SHA256 = 1 # gnutls/x509.h
533
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
534
535
# Types
536
class session_int(ctypes.Structure):
537
_fields_ = []
538
session_t = ctypes.POINTER(session_int)
539
540
class certificate_credentials_st(ctypes.Structure):
541
_fields_ = []
542
certificate_credentials_t = ctypes.POINTER(
543
certificate_credentials_st)
544
certificate_type_t = ctypes.c_int
545
546
class datum_t(ctypes.Structure):
547
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
548
('size', ctypes.c_uint)]
549
550
class openpgp_crt_int(ctypes.Structure):
551
_fields_ = []
552
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
553
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
554
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
555
credentials_type_t = ctypes.c_int
556
transport_ptr_t = ctypes.c_void_p
557
close_request_t = ctypes.c_int
558
559
# Exceptions
560
class Error(Exception):
561
def __init__(self, message=None, code=None, args=()):
562
# Default usage is by a message string, but if a return
563
# code is passed, convert it to a string with
564
# gnutls.strerror()
565
self.code = code
566
if message is None and code is not None:
567
message = gnutls.strerror(code)
568
return super(gnutls.Error, self).__init__(
569
message, *args)
570
571
class CertificateSecurityError(Error):
572
pass
573
574
# Classes
575
class Credentials(object):
576
def __init__(self):
577
self._c_object = gnutls.certificate_credentials_t()
578
gnutls.certificate_allocate_credentials(
579
ctypes.byref(self._c_object))
580
self.type = gnutls.CRD_CERTIFICATE
581
582
def __del__(self):
583
gnutls.certificate_free_credentials(self._c_object)
584
585
class ClientSession(object):
586
def __init__(self, socket, credentials=None):
587
self._c_object = gnutls.session_t()
588
gnutls_flags = gnutls.CLIENT
589
if gnutls.check_version("3.5.6"):
590
gnutls_flags |= gnutls.NO_TICKETS
591
if gnutls.has_rawpk:
592
gnutls_flags |= gnutls.ENABLE_RAWPK
593
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
594
del gnutls_flags
595
gnutls.set_default_priority(self._c_object)
596
gnutls.transport_set_ptr(self._c_object, socket.fileno())
597
gnutls.handshake_set_private_extensions(self._c_object,
598
True)
599
self.socket = socket
600
if credentials is None:
601
credentials = gnutls.Credentials()
602
gnutls.credentials_set(self._c_object, credentials.type,
603
ctypes.cast(credentials._c_object,
604
ctypes.c_void_p))
605
self.credentials = credentials
606
607
def __del__(self):
608
gnutls.deinit(self._c_object)
609
610
def handshake(self):
611
return gnutls.handshake(self._c_object)
612
613
def send(self, data):
614
data = bytes(data)
615
data_len = len(data)
616
while data_len > 0:
617
data_len -= gnutls.record_send(self._c_object,
618
data[-data_len:],
619
data_len)
620
621
def bye(self):
622
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
623
624
# Error handling functions
625
def _error_code(result):
626
"""A function to raise exceptions on errors, suitable
627
for the 'restype' attribute on ctypes functions"""
628
if result >= 0:
629
return result
630
if result == gnutls.E_NO_CERTIFICATE_FOUND:
631
raise gnutls.CertificateSecurityError(code=result)
632
raise gnutls.Error(code=result)
633
634
def _retry_on_error(result, func, arguments):
635
"""A function to retry on some errors, suitable
636
for the 'errcheck' attribute on ctypes functions"""
637
while result < 0:
638
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
639
return _error_code(result)
640
result = func(*arguments)
641
return result
642
643
# Unless otherwise indicated, the function declarations below are
644
# all from the gnutls/gnutls.h C header file.
645
646
# Functions
647
priority_set_direct = _library.gnutls_priority_set_direct
648
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
649
ctypes.POINTER(ctypes.c_char_p)]
650
priority_set_direct.restype = _error_code
651
652
init = _library.gnutls_init
653
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
654
init.restype = _error_code
655
656
set_default_priority = _library.gnutls_set_default_priority
657
set_default_priority.argtypes = [session_t]
658
set_default_priority.restype = _error_code
659
660
record_send = _library.gnutls_record_send
661
record_send.argtypes = [session_t, ctypes.c_void_p,
662
ctypes.c_size_t]
663
record_send.restype = ctypes.c_ssize_t
664
record_send.errcheck = _retry_on_error
665
666
certificate_allocate_credentials = (
667
_library.gnutls_certificate_allocate_credentials)
668
certificate_allocate_credentials.argtypes = [
669
ctypes.POINTER(certificate_credentials_t)]
670
certificate_allocate_credentials.restype = _error_code
671
672
certificate_free_credentials = (
673
_library.gnutls_certificate_free_credentials)
674
certificate_free_credentials.argtypes = [
675
certificate_credentials_t]
676
certificate_free_credentials.restype = None
677
678
handshake_set_private_extensions = (
679
_library.gnutls_handshake_set_private_extensions)
680
handshake_set_private_extensions.argtypes = [session_t,
681
ctypes.c_int]
682
handshake_set_private_extensions.restype = None
683
684
credentials_set = _library.gnutls_credentials_set
685
credentials_set.argtypes = [session_t, credentials_type_t,
686
ctypes.c_void_p]
687
credentials_set.restype = _error_code
688
689
strerror = _library.gnutls_strerror
690
strerror.argtypes = [ctypes.c_int]
691
strerror.restype = ctypes.c_char_p
692
693
certificate_type_get = _library.gnutls_certificate_type_get
694
certificate_type_get.argtypes = [session_t]
695
certificate_type_get.restype = _error_code
696
697
certificate_get_peers = _library.gnutls_certificate_get_peers
698
certificate_get_peers.argtypes = [session_t,
699
ctypes.POINTER(ctypes.c_uint)]
700
certificate_get_peers.restype = ctypes.POINTER(datum_t)
701
702
global_set_log_level = _library.gnutls_global_set_log_level
703
global_set_log_level.argtypes = [ctypes.c_int]
704
global_set_log_level.restype = None
705
706
global_set_log_function = _library.gnutls_global_set_log_function
707
global_set_log_function.argtypes = [log_func]
708
global_set_log_function.restype = None
709
710
deinit = _library.gnutls_deinit
711
deinit.argtypes = [session_t]
712
deinit.restype = None
713
714
handshake = _library.gnutls_handshake
715
handshake.argtypes = [session_t]
716
handshake.restype = _error_code
717
handshake.errcheck = _retry_on_error
718
719
transport_set_ptr = _library.gnutls_transport_set_ptr
720
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
721
transport_set_ptr.restype = None
722
723
bye = _library.gnutls_bye
724
bye.argtypes = [session_t, close_request_t]
725
bye.restype = _error_code
726
bye.errcheck = _retry_on_error
727
728
check_version = _library.gnutls_check_version
729
check_version.argtypes = [ctypes.c_char_p]
730
check_version.restype = ctypes.c_char_p
731
732
_need_version = b"3.3.0"
733
if check_version(_need_version) is None:
734
raise self.Error("Needs GnuTLS {} or later"
735
.format(_need_version))
736
737
_tls_rawpk_version = b"3.6.6"
738
has_rawpk = bool(check_version(_tls_rawpk_version))
739
740
if has_rawpk:
741
# Types
742
class pubkey_st(ctypes.Structure):
743
_fields = []
744
pubkey_t = ctypes.POINTER(pubkey_st)
745
746
x509_crt_fmt_t = ctypes.c_int
747
748
# All the function declarations below are from gnutls/abstract.h
749
pubkey_init = _library.gnutls_pubkey_init
750
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
751
pubkey_init.restype = _error_code
752
753
pubkey_import = _library.gnutls_pubkey_import
754
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
755
x509_crt_fmt_t]
756
pubkey_import.restype = _error_code
757
758
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
759
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
760
ctypes.POINTER(ctypes.c_ubyte),
761
ctypes.POINTER(ctypes.c_size_t)]
762
pubkey_get_key_id.restype = _error_code
763
764
pubkey_deinit = _library.gnutls_pubkey_deinit
765
pubkey_deinit.argtypes = [pubkey_t]
766
pubkey_deinit.restype = None
767
else:
768
# All the function declarations below are from gnutls/openpgp.h
769
770
openpgp_crt_init = _library.gnutls_openpgp_crt_init
771
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
772
openpgp_crt_init.restype = _error_code
773
774
openpgp_crt_import = _library.gnutls_openpgp_crt_import
775
openpgp_crt_import.argtypes = [openpgp_crt_t,
776
ctypes.POINTER(datum_t),
777
openpgp_crt_fmt_t]
778
openpgp_crt_import.restype = _error_code
779
780
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
781
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
782
ctypes.POINTER(ctypes.c_uint)]
783
openpgp_crt_verify_self.restype = _error_code
784
785
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
786
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
787
openpgp_crt_deinit.restype = None
788
789
openpgp_crt_get_fingerprint = (
790
_library.gnutls_openpgp_crt_get_fingerprint)
791
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
792
ctypes.c_void_p,
793
ctypes.POINTER(
794
ctypes.c_size_t)]
795
openpgp_crt_get_fingerprint.restype = _error_code
796
797
if check_version("3.6.4"):
798
certificate_type_get2 = _library.gnutls_certificate_type_get2
799
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
800
certificate_type_get2.restype = _error_code
801
802
# Remove non-public functions
803
del _error_code, _retry_on_error
804
805
806
def call_pipe(connection, # : multiprocessing.Connection
807
func, *args, **kwargs):
808
"""This function is meant to be called by multiprocessing.Process
809
810
This function runs func(*args, **kwargs), and writes the resulting
811
return value on the provided multiprocessing.Connection.
812
"""
813
connection.send(func(*args, **kwargs))
814
connection.close()
815
816
275
817
class Client(object):
276
818
"""A representation of a client host served by this server.
277
819
278
820
Attributes:
279
_approved: bool(); 'None' if not yet approved/disapproved
821
approved: bool(); 'None' if not yet approved/disapproved
280
822
approval_delay: datetime.timedelta(); Time to wait for approval
281
823
approval_duration: datetime.timedelta(); Duration of one approval
282
824
checker: subprocess.Popen(); a running checker process used
283
825
to see if the client lives.
284
826
'None' if no process is running.
285
checker_callback_tag: a gobject event source tag, or None
827
checker_callback_tag: a GLib event source tag, or None
286
828
checker_command: string; External command which is run to check
287
829
if client lives. %() expansions are done at
288
830
runtime with vars(self) as dict, so that for
289
831
instance %(name)s can be used in the command.
290
checker_initiator_tag: a gobject event source tag, or None
832
checker_initiator_tag: a GLib event source tag, or None
291
833
created: datetime.datetime(); (UTC) object creation
834
client_structure: Object describing what attributes a client has
835
and is used for storing the client at exit
292
836
current_checker_command: string; current running checker_command
293
disable_hook: If set, called by disable() as disable_hook(self)
294
disable_initiator_tag: a gobject event source tag, or None
837
disable_initiator_tag: a GLib event source tag, or None
295
838
enabled: bool()
296
839
fingerprint: string (40 or 32 hexadecimal digits); used to
297
uniquely identify the client
840
uniquely identify an OpenPGP client
841
key_id: string (64 hexadecimal digits); used to uniquely identify
842
a client using raw public keys
298
843
host: string; available for use by the checker command
299
844
interval: datetime.timedelta(); How often to start a new checker
300
845
last_approval_request: datetime.datetime(); (UTC) or None
301
846
last_checked_ok: datetime.datetime(); (UTC) or None
302
last_enabled: datetime.datetime(); (UTC)
847
last_checker_status: integer between 0 and 255 reflecting exit
848
status of last checker. -1 reflects crashed
849
checker, -2 means no checker completed yet.
850
last_checker_signal: The signal which killed the last checker, if
851
last_checker_status is -1
852
last_enabled: datetime.datetime(); (UTC) or None
303
853
name: string; from the config file, used in log messages and
304
854
D-Bus identifiers
305
855
secret: bytestring; sent verbatim (over TLS) to client
306
856
timeout: datetime.timedelta(); How long from last_checked_ok
307
857
until this client is disabled
308
extended_timeout: extra long timeout when password has been sent
858
extended_timeout: extra long timeout when secret has been sent
309
859
runtime_expansions: Allowed attributes for runtime expansion.
310
860
expires: datetime.datetime(); time (UTC) when a client will be
311
861
disabled, or None
862
server_settings: The server_settings dict from main()
312
863
"""
313
864
314
865
runtime_expansions = ("approval_delay", "approval_duration",
315
"created", "enabled", "fingerprint",
316
"host", "interval", "last_checked_ok",
866
"created", "enabled", "expires", "key_id",
867
"fingerprint", "host", "interval",
868
"last_approval_request", "last_checked_ok",
317
869
"last_enabled", "name", "timeout")
318
319
def timeout_milliseconds(self):
320
"Return the 'timeout' attribute in milliseconds"
321
return _timedelta_to_milliseconds(self.timeout)
322
323
def extended_timeout_milliseconds(self):
324
"Return the 'extended_timeout' attribute in milliseconds"
325
return _timedelta_to_milliseconds(self.extended_timeout)
326
327
def interval_milliseconds(self):
328
"Return the 'interval' attribute in milliseconds"
329
return _timedelta_to_milliseconds(self.interval)
330
331
def approval_delay_milliseconds(self):
332
return _timedelta_to_milliseconds(self.approval_delay)
333
334
def __init__(self, name = None, disable_hook=None, config=None):
335
"""Note: the 'checker' key in 'config' sets the
336
'checker_command' attribute and *not* the 'checker'
337
attribute."""
870
client_defaults = {
871
"timeout": "PT5M",
872
"extended_timeout": "PT15M",
873
"interval": "PT2M",
874
"checker": "fping -q -- %%(host)s",
875
"host": "",
876
"approval_delay": "PT0S",
877
"approval_duration": "PT1S",
878
"approved_by_default": "True",
879
"enabled": "True",
880
}
881
882
@staticmethod
883
def config_parser(config):
884
"""Construct a new dict of client settings of this form:
885
{ client_name: {setting_name: value, ...}, ...}
886
with exceptions for any special settings as defined above.
887
NOTE: Must be a pure function. Must return the same result
888
value given the same arguments.
889
"""
890
settings = {}
891
for client_name in config.sections():
892
section = dict(config.items(client_name))
893
client = settings[client_name] = {}
894
895
client["host"] = section["host"]
896
# Reformat values from string types to Python types
897
client["approved_by_default"] = config.getboolean(
898
client_name, "approved_by_default")
899
client["enabled"] = config.getboolean(client_name,
900
"enabled")
901
902
# Uppercase and remove spaces from key_id and fingerprint
903
# for later comparison purposes with return value from the
904
# key_id() and fingerprint() functions
905
client["key_id"] = (section.get("key_id", "").upper()
906
.replace(" ", ""))
907
client["fingerprint"] = (section["fingerprint"].upper()
908
.replace(" ", ""))
909
if "secret" in section:
910
client["secret"] = codecs.decode(section["secret"]
911
.encode("utf-8"),
912
"base64")
913
elif "secfile" in section:
914
with open(os.path.expanduser(os.path.expandvars
915
(section["secfile"])),
916
"rb") as secfile:
917
client["secret"] = secfile.read()
918
else:
919
raise TypeError("No secret or secfile for section {}"
920
.format(section))
921
client["timeout"] = string_to_delta(section["timeout"])
922
client["extended_timeout"] = string_to_delta(
923
section["extended_timeout"])
924
client["interval"] = string_to_delta(section["interval"])
925
client["approval_delay"] = string_to_delta(
926
section["approval_delay"])
927
client["approval_duration"] = string_to_delta(
928
section["approval_duration"])
929
client["checker_command"] = section["checker"]
930
client["last_approval_request"] = None
931
client["last_checked_ok"] = None
932
client["last_checker_status"] = -2
933
934
return settings
935
936
def __init__(self, settings, name=None, server_settings=None):
338
937
self.name = name
339
if config is None:
340
config = {}
938
if server_settings is None:
939
server_settings = {}
940
self.server_settings = server_settings
941
# adding all client settings
942
for setting, value in settings.items():
943
setattr(self, setting, value)
944
945
if self.enabled:
946
if not hasattr(self, "last_enabled"):
947
self.last_enabled = datetime.datetime.utcnow()
948
if not hasattr(self, "expires"):
949
self.expires = (datetime.datetime.utcnow()
950
+ self.timeout)
951
else:
952
self.last_enabled = None
953
self.expires = None
954
341
955
logger.debug("Creating client %r", self.name)
342
# Uppercase and remove spaces from fingerprint for later
343
# comparison purposes with return value from the fingerprint()
344
# function
345
self.fingerprint = (config["fingerprint"].upper()
346
.replace(" ", ""))
956
logger.debug(" Key ID: %s", self.key_id)
347
957
logger.debug(" Fingerprint: %s", self.fingerprint)
348
if "secret" in config:
349
self.secret = config["secret"].decode("base64")
350
elif "secfile" in config:
351
with open(os.path.expanduser(os.path.expandvars
352
(config["secfile"])),
353
"rb") as secfile:
354
self.secret = secfile.read()
355
else:
356
raise TypeError("No secret or secfile for client %s"
357
% self.name)
358
self.host = config.get("host", "")
359
self.created = datetime.datetime.utcnow()
360
self.enabled = False
361
self.last_approval_request = None
362
self.last_enabled = None
363
self.last_checked_ok = None
364
self.timeout = string_to_delta(config["timeout"])
365
self.extended_timeout = string_to_delta(config
366
["extended_timeout"])
367
self.interval = string_to_delta(config["interval"])
368
self.disable_hook = disable_hook
958
self.created = settings.get("created",
959
datetime.datetime.utcnow())
960
961
# attributes specific for this server instance
369
962
self.checker = None
370
963
self.checker_initiator_tag = None
371
964
self.disable_initiator_tag = None
372
self.expires = None
373
965
self.checker_callback_tag = None
374
self.checker_command = config["checker"]
375
966
self.current_checker_command = None
376
self.last_connect = None
377
self._approved = None
378
self.approved_by_default = config.get("approved_by_default",
379
True)
967
self.approved = None
380
968
self.approvals_pending = 0
381
self.approval_delay = string_to_delta(
382
config["approval_delay"])
383
self.approval_duration = string_to_delta(
384
config["approval_duration"])
385
self.changedstate = (multiprocessing_manager
386
.Condition(multiprocessing_manager
387
.Lock()))
388
969
self.changedstate = multiprocessing_manager.Condition(
970
multiprocessing_manager.Lock())
971
self.client_structure = [attr
972
for attr in self.__dict__.keys()
973
if not attr.startswith("_")]
974
self.client_structure.append("client_structure")
975
976
for name, t in inspect.getmembers(
977
type(self), lambda obj: isinstance(obj, property)):
978
if not name.startswith("_"):
979
self.client_structure.append(name)
980
981
# Send notice to process children that client state has changed
389
982
def send_changedstate(self):
390
self.changedstate.acquire()
391
self.changedstate.notify_all()
392
self.changedstate.release()
393
983
with self.changedstate:
984
self.changedstate.notify_all()
985
394
986
def enable(self):
395
987
"""Start this client's checker and timeout hooks"""
396
988
if getattr(self, "enabled", False):
397
989
# Already enabled
398
990
return
399
self.send_changedstate()
400
# Schedule a new checker to be started an 'interval' from now,
401
# and every interval from then on.
402
self.checker_initiator_tag = (gobject.timeout_add
403
(self.interval_milliseconds(),
404
self.start_checker))
405
# Schedule a disable() when 'timeout' has passed
406
991
self.expires = datetime.datetime.utcnow() + self.timeout
407
self.disable_initiator_tag = (gobject.timeout_add
408
(self.timeout_milliseconds(),
409
self.disable))
410
992
self.enabled = True
411
993
self.last_enabled = datetime.datetime.utcnow()
412
# Also start a new checker *right now*.
413
self.start_checker()
414
994
self.init_checker()
995
self.send_changedstate()
996
415
997
def disable(self, quiet=True):
416
998
"""Disable this client."""
417
999
if not getattr(self, "enabled", False):
418
1000
return False
419
1001
if not quiet:
420
self.send_changedstate()
421
if not quiet:
422
1002
logger.info("Disabling client %s", self.name)
423
if getattr(self, "disable_initiator_tag", False):
424
gobject.source_remove(self.disable_initiator_tag)
1003
if getattr(self, "disable_initiator_tag", None) is not None:
1004
GLib.source_remove(self.disable_initiator_tag)
425
1005
self.disable_initiator_tag = None
426
1006
self.expires = None
427
if getattr(self, "checker_initiator_tag", False):
428
gobject.source_remove(self.checker_initiator_tag)
1007
if getattr(self, "checker_initiator_tag", None) is not None:
1008
GLib.source_remove(self.checker_initiator_tag)
429
1009
self.checker_initiator_tag = None
430
1010
self.stop_checker()
431
if self.disable_hook:
432
self.disable_hook(self)
433
1011
self.enabled = False
434
# Do not run this again if called by a gobject.timeout_add
1012
if not quiet:
1013
self.send_changedstate()
1014
# Do not run this again if called by a GLib.timeout_add
435
1015
return False
436
1016
437
1017
def __del__(self):
438
self.disable_hook = None
439
1018
self.disable()
440
441
def checker_callback(self, pid, condition, command):
1019
1020
def init_checker(self):
1021
# Schedule a new checker to be started an 'interval' from now,
1022
# and every interval from then on.
1023
if self.checker_initiator_tag is not None:
1024
GLib.source_remove(self.checker_initiator_tag)
1025
self.checker_initiator_tag = GLib.timeout_add(
1026
int(self.interval.total_seconds() * 1000),
1027
self.start_checker)
1028
# Schedule a disable() when 'timeout' has passed
1029
if self.disable_initiator_tag is not None:
1030
GLib.source_remove(self.disable_initiator_tag)
1031
self.disable_initiator_tag = GLib.timeout_add(
1032
int(self.timeout.total_seconds() * 1000), self.disable)
1033
# Also start a new checker *right now*.
1034
self.start_checker()
1035
1036
def checker_callback(self, source, condition, connection,
1037
command):
442
1038
"""The checker has completed, so take appropriate actions."""
443
1039
self.checker_callback_tag = None
444
1040
self.checker = None
445
if os.WIFEXITED(condition):
446
exitstatus = os.WEXITSTATUS(condition)
447
if exitstatus == 0:
1041
# Read return code from connection (see call_pipe)
1042
returncode = connection.recv()
1043
connection.close()
1044
1045
if returncode >= 0:
1046
self.last_checker_status = returncode
1047
self.last_checker_signal = None
1048
if self.last_checker_status == 0:
448
1049
logger.info("Checker for %(name)s succeeded",
449
1050
vars(self))
450
1051
self.checked_ok()
451
1052
else:
452
logger.info("Checker for %(name)s failed",
453
vars(self))
1053
logger.info("Checker for %(name)s failed", vars(self))
454
1054
else:
1055
self.last_checker_status = -1
1056
self.last_checker_signal = -returncode
455
1057
logger.warning("Checker for %(name)s crashed?",
456
1058
vars(self))
457
458
def checked_ok(self, timeout=None):
459
"""Bump up the timeout for this client.
460
461
This should only be called when the client has been seen,
462
alive and well.
463
"""
1059
return False
1060
1061
def checked_ok(self):
1062
"""Assert that the client has been seen, alive and well."""
1063
self.last_checked_ok = datetime.datetime.utcnow()
1064
self.last_checker_status = 0
1065
self.last_checker_signal = None
1066
self.bump_timeout()
1067
1068
def bump_timeout(self, timeout=None):
1069
"""Bump up the timeout for this client."""
464
1070
if timeout is None:
465
1071
timeout = self.timeout
466
self.last_checked_ok = datetime.datetime.utcnow()
467
gobject.source_remove(self.disable_initiator_tag)
468
self.expires = datetime.datetime.utcnow() + timeout
469
self.disable_initiator_tag = (gobject.timeout_add
470
(_timedelta_to_milliseconds
471
(timeout), self.disable))
472
1072
if self.disable_initiator_tag is not None:
1073
GLib.source_remove(self.disable_initiator_tag)
1074
self.disable_initiator_tag = None
1075
if getattr(self, "enabled", False):
1076
self.disable_initiator_tag = GLib.timeout_add(
1077
int(timeout.total_seconds() * 1000), self.disable)
1078
self.expires = datetime.datetime.utcnow() + timeout
1079
473
1080
def need_approval(self):
474
1081
self.last_approval_request = datetime.datetime.utcnow()
475
1082
476
1083
def start_checker(self):
477
1084
"""Start a new checker subprocess if one is not running.
478
1085
479
1086
If a checker already exists, leave it running and do
480
1087
nothing."""
481
1088
# The reason for not killing a running checker is that if we
482
# did that, then if a checker (for some reason) started
483
# running slowly and taking more than 'interval' time, the
484
# client would inevitably timeout, since no checker would get
485
# a chance to run to completion. If we instead leave running
1089
# did that, and if a checker (for some reason) started running
1090
# slowly and taking more than 'interval' time, then the client
1091
# would inevitably timeout, since no checker would get a
1092
# chance to run to completion. If we instead leave running
486
1093
# checkers alone, the checker would have to take more time
487
1094
# than 'timeout' for the client to be disabled, which is as it
488
1095
# should be.
489
490
# If a checker exists, make sure it is not a zombie
491
try:
492
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
493
except (AttributeError, OSError) as error:
494
if (isinstance(error, OSError)
495
and error.errno != errno.ECHILD):
496
raise error
497
else:
498
if pid:
499
logger.warning("Checker was a zombie")
500
gobject.source_remove(self.checker_callback_tag)
501
self.checker_callback(pid, status,
502
self.current_checker_command)
1096
1097
if self.checker is not None and not self.checker.is_alive():
1098
logger.warning("Checker was not alive; joining")
1099
self.checker.join()
1100
self.checker = None
503
1101
# Start a new checker if needed
504
1102
if self.checker is None:
1103
# Escape attributes for the shell
1104
escaped_attrs = {
1105
attr: re.escape(str(getattr(self, attr)))
1106
for attr in self.runtime_expansions}
505
1107
try:
506
# In case checker_command has exactly one % operator
507
command = self.checker_command % self.host
508
except TypeError:
509
# Escape attributes for the shell
510
escaped_attrs = dict(
511
(attr,
512
re.escape(unicode(str(getattr(self, attr, "")),
513
errors=
514
'replace')))
515
for attr in
516
self.runtime_expansions)
517
518
try:
519
command = self.checker_command % escaped_attrs
520
except TypeError as error:
521
logger.error('Could not format string "%s":'
522
' %s', self.checker_command, error)
523
return True # Try again later
1108
command = self.checker_command % escaped_attrs
1109
except TypeError as error:
1110
logger.error('Could not format string "%s"',
1111
self.checker_command,
1112
exc_info=error)
1113
return True # Try again later
524
1114
self.current_checker_command = command
525
try:
526
logger.info("Starting checker %r for %s",
527
command, self.name)
528
# We don't need to redirect stdout and stderr, since
529
# in normal mode, that is already done by daemon(),
530
# and in debug mode we don't want to. (Stdin is
531
# always replaced by /dev/null.)
532
self.checker = subprocess.Popen(command,
533
close_fds=True,
534
shell=True, cwd="/")
535
self.checker_callback_tag = (gobject.child_watch_add
536
(self.checker.pid,
537
self.checker_callback,
538
data=command))
539
# The checker may have completed before the gobject
540
# watch was added. Check for this.
541
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
542
if pid:
543
gobject.source_remove(self.checker_callback_tag)
544
self.checker_callback(pid, status, command)
545
except OSError as error:
546
logger.error("Failed to start subprocess: %s",
547
error)
548
# Re-run this periodically if run by gobject.timeout_add
1115
logger.info("Starting checker %r for %s", command,
1116
self.name)
1117
# We don't need to redirect stdout and stderr, since
1118
# in normal mode, that is already done by daemon(),
1119
# and in debug mode we don't want to. (Stdin is
1120
# always replaced by /dev/null.)
1121
# The exception is when not debugging but nevertheless
1122
# running in the foreground; use the previously
1123
# created wnull.
1124
popen_args = {"close_fds": True,
1125
"shell": True,
1126
"cwd": "/"}
1127
if (not self.server_settings["debug"]
1128
and self.server_settings["foreground"]):
1129
popen_args.update({"stdout": wnull,
1130
"stderr": wnull})
1131
pipe = multiprocessing.Pipe(duplex=False)
1132
self.checker = multiprocessing.Process(
1133
target=call_pipe,
1134
args=(pipe[1], subprocess.call, command),
1135
kwargs=popen_args)
1136
self.checker.start()
1137
self.checker_callback_tag = GLib.io_add_watch(
1138
pipe[0].fileno(), GLib.IO_IN,
1139
self.checker_callback, pipe[0], command)
1140
# Re-run this periodically if run by GLib.timeout_add
549
1141
return True
550
1142
551
1143
def stop_checker(self):
552
1144
"""Force the checker process, if any, to stop."""
553
1145
if self.checker_callback_tag:
554
gobject.source_remove(self.checker_callback_tag)
1146
GLib.source_remove(self.checker_callback_tag)
555
1147
self.checker_callback_tag = None
556
1148
if getattr(self, "checker", None) is None:
557
1149
return
558
1150
logger.debug("Stopping checker for %(name)s", vars(self))
559
try:
560
os.kill(self.checker.pid, signal.SIGTERM)
561
#time.sleep(0.5)
562
#if self.checker.poll() is None:
563
# os.kill(self.checker.pid, signal.SIGKILL)
564
except OSError as error:
565
if error.errno != errno.ESRCH: # No such process
566
raise
1151
self.checker.terminate()
567
1152
self.checker = None
568
1153
569
1154
570
def dbus_service_property(dbus_interface, signature="v",
571
access="readwrite", byte_arrays=False):
1155
def dbus_service_property(dbus_interface,
1156
signature="v",
1157
access="readwrite",
1158
byte_arrays=False):
572
1159
"""Decorators for marking methods of a DBusObjectWithProperties to
573
1160
become properties on the D-Bus.
574
1161
575
1162
The decorated method will be called with no arguments by "Get"
576
1163
and with one argument by "Set".
577
1164
578
1165
The parameters, where they are supported, are the same as
579
1166
dbus.service.method, except there is only "signature", since the
580
1167
type from Get() and the type sent to Set() is the same.
583
1170
# "Set" method, so we fail early here:
584
1171
if byte_arrays and signature != "ay":
585
1172
raise ValueError("Byte arrays not supported for non-'ay'"
586
" signature %r" % signature)
1173
" signature {!r}".format(signature))
1174
587
1175
def decorator(func):
588
1176
func._dbus_is_property = True
589
1177
func._dbus_interface = dbus_interface
592
1180
func._dbus_name = func.__name__
593
1181
if func._dbus_name.endswith("_dbus_property"):
594
1182
func._dbus_name = func._dbus_name[:-14]
595
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
596
return func
1183
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1184
return func
1185
1186
return decorator
1187
1188
1189
def dbus_interface_annotations(dbus_interface):
1190
"""Decorator for marking functions returning interface annotations
1191
1192
Usage:
1193
1194
@dbus_interface_annotations("org.example.Interface")
1195
def _foo(self): # Function name does not matter
1196
return {"org.freedesktop.DBus.Deprecated": "true",
1197
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1198
"false"}
1199
"""
1200
1201
def decorator(func):
1202
func._dbus_is_interface = True
1203
func._dbus_interface = dbus_interface
1204
func._dbus_name = dbus_interface
1205
return func
1206
1207
return decorator
1208
1209
1210
def dbus_annotations(annotations):
1211
"""Decorator to annotate D-Bus methods, signals or properties
1212
Usage:
1213
1214
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1215
"org.freedesktop.DBus.Property."
1216
"EmitsChangedSignal": "false"})
1217
@dbus_service_property("org.example.Interface", signature="b",
1218
access="r")
1219
def Property_dbus_property(self):
1220
return dbus.Boolean(False)
1221
1222
See also the DBusObjectWithAnnotations class.
1223
"""
1224
1225
def decorator(func):
1226
func._dbus_annotations = annotations
1227
return func
1228
597
1229
return decorator
598
1230
599
1231
600
1232
class DBusPropertyException(dbus.exceptions.DBusException):
601
1233
"""A base class for D-Bus property-related exceptions
602
1234
"""
603
def __unicode__(self):
604
return unicode(str(self))
1235
pass
605
1236
606
1237
607
1238
class DBusPropertyAccessException(DBusPropertyException):
616
1247
pass
617
1248
618
1249
619
class DBusObjectWithProperties(dbus.service.Object):
1250
class DBusObjectWithAnnotations(dbus.service.Object):
1251
"""A D-Bus object with annotations.
1252
1253
Classes inheriting from this can use the dbus_annotations
1254
decorator to add annotations to methods or signals.
1255
"""
1256
1257
@staticmethod
1258
def _is_dbus_thing(thing):
1259
"""Returns a function testing if an attribute is a D-Bus thing
1260
1261
If called like _is_dbus_thing("method") it returns a function
1262
suitable for use as predicate to inspect.getmembers().
1263
"""
1264
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1265
False)
1266
1267
def _get_all_dbus_things(self, thing):
1268
"""Returns a generator of (name, attribute) pairs
1269
"""
1270
return ((getattr(athing.__get__(self), "_dbus_name", name),
1271
athing.__get__(self))
1272
for cls in self.__class__.__mro__
1273
for name, athing in
1274
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1275
1276
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1277
out_signature="s",
1278
path_keyword='object_path',
1279
connection_keyword='connection')
1280
def Introspect(self, object_path, connection):
1281
"""Overloading of standard D-Bus method.
1282
1283
Inserts annotation tags on methods and signals.
1284
"""
1285
xmlstring = dbus.service.Object.Introspect(self, object_path,
1286
connection)
1287
try:
1288
document = xml.dom.minidom.parseString(xmlstring)
1289
1290
for if_tag in document.getElementsByTagName("interface"):
1291
# Add annotation tags
1292
for typ in ("method", "signal"):
1293
for tag in if_tag.getElementsByTagName(typ):
1294
annots = dict()
1295
for name, prop in (self.
1296
_get_all_dbus_things(typ)):
1297
if (name == tag.getAttribute("name")
1298
and prop._dbus_interface
1299
== if_tag.getAttribute("name")):
1300
annots.update(getattr(
1301
prop, "_dbus_annotations", {}))
1302
for name, value in annots.items():
1303
ann_tag = document.createElement(
1304
"annotation")
1305
ann_tag.setAttribute("name", name)
1306
ann_tag.setAttribute("value", value)
1307
tag.appendChild(ann_tag)
1308
# Add interface annotation tags
1309
for annotation, value in dict(
1310
itertools.chain.from_iterable(
1311
annotations().items()
1312
for name, annotations
1313
in self._get_all_dbus_things("interface")
1314
if name == if_tag.getAttribute("name")
1315
)).items():
1316
ann_tag = document.createElement("annotation")
1317
ann_tag.setAttribute("name", annotation)
1318
ann_tag.setAttribute("value", value)
1319
if_tag.appendChild(ann_tag)
1320
# Fix argument name for the Introspect method itself
1321
if (if_tag.getAttribute("name")
1322
== dbus.INTROSPECTABLE_IFACE):
1323
for cn in if_tag.getElementsByTagName("method"):
1324
if cn.getAttribute("name") == "Introspect":
1325
for arg in cn.getElementsByTagName("arg"):
1326
if (arg.getAttribute("direction")
1327
== "out"):
1328
arg.setAttribute("name",
1329
"xml_data")
1330
xmlstring = document.toxml("utf-8")
1331
document.unlink()
1332
except (AttributeError, xml.dom.DOMException,
1333
xml.parsers.expat.ExpatError) as error:
1334
logger.error("Failed to override Introspection method",
1335
exc_info=error)
1336
return xmlstring
1337
1338
1339
class DBusObjectWithProperties(DBusObjectWithAnnotations):
620
1340
"""A D-Bus object with properties.
621
1341
622
1342
Classes inheriting from this can use the dbus_service_property
623
1343
decorator to expose methods as D-Bus properties. It exposes the
624
1344
standard Get(), Set(), and GetAll() methods on the D-Bus.
625
1345
"""
626
627
@staticmethod
628
def _is_dbus_property(obj):
629
return getattr(obj, "_dbus_is_property", False)
630
631
def _get_all_dbus_properties(self):
632
"""Returns a generator of (name, attribute) pairs
633
"""
634
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
635
for cls in self.__class__.__mro__
636
for name, prop in
637
inspect.getmembers(cls, self._is_dbus_property))
638
1346
639
1347
def _get_dbus_property(self, interface_name, property_name):
640
1348
"""Returns a bound method if one exists which is a D-Bus
641
1349
property with the specified name and interface.
642
1350
"""
643
for cls in self.__class__.__mro__:
644
for name, value in (inspect.getmembers
645
(cls, self._is_dbus_property)):
1351
for cls in self.__class__.__mro__:
1352
for name, value in inspect.getmembers(
1353
cls, self._is_dbus_thing("property")):
646
1354
if (value._dbus_name == property_name
647
1355
and value._dbus_interface == interface_name):
648
1356
return value.__get__(self)
649
1357
650
1358
# No such property
651
raise DBusPropertyNotFound(self.dbus_object_path + ":"
652
+ interface_name + "."
653
+ property_name)
654
655
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1359
raise DBusPropertyNotFound("{}:{}.{}".format(
1360
self.dbus_object_path, interface_name, property_name))
1361
1362
@classmethod
1363
def _get_all_interface_names(cls):
1364
"""Get a sequence of all interfaces supported by an object"""
1365
return (name for name in set(getattr(getattr(x, attr),
1366
"_dbus_interface", None)
1367
for x in (inspect.getmro(cls))
1368
for attr in dir(x))
1369
if name is not None)
1370
1371
@dbus.service.method(dbus.PROPERTIES_IFACE,
1372
in_signature="ss",
656
1373
out_signature="v")
657
1374
def Get(self, interface_name, property_name):
658
1375
"""Standard D-Bus property Get() method, see D-Bus standard.
664
1381
if not hasattr(value, "variant_level"):
665
1382
return value
666
1383
return type(value)(value, variant_level=value.variant_level+1)
667
1384
668
1385
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
669
1386
def Set(self, interface_name, property_name, value):
670
1387
"""Standard D-Bus property Set() method, see D-Bus standard.
676
1393
# The byte_arrays option is not supported yet on
677
1394
# signatures other than "ay".
678
1395
if prop._dbus_signature != "ay":
679
raise ValueError
680
value = dbus.ByteArray(''.join(unichr(byte)
681
for byte in value))
1396
raise ValueError("Byte arrays not supported for non-"
1397
"'ay' signature {!r}"
1398
.format(prop._dbus_signature))
1399
value = dbus.ByteArray(b''.join(chr(byte)
1400
for byte in value))
682
1401
prop(value)
683
684
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1402
1403
@dbus.service.method(dbus.PROPERTIES_IFACE,
1404
in_signature="s",
685
1405
out_signature="a{sv}")
686
1406
def GetAll(self, interface_name):
687
1407
"""Standard D-Bus property GetAll() method, see D-Bus
688
1408
standard.
689
1409
690
1410
Note: Will not include properties with access="write".
691
1411
"""
692
all = {}
693
for name, prop in self._get_all_dbus_properties():
1412
properties = {}
1413
for name, prop in self._get_all_dbus_things("property"):
694
1414
if (interface_name
695
1415
and interface_name != prop._dbus_interface):
696
1416
# Interface non-empty but did not match
700
1420
continue
701
1421
value = prop()
702
1422
if not hasattr(value, "variant_level"):
703
all[name] = value
1423
properties[name] = value
704
1424
continue
705
all[name] = type(value)(value, variant_level=
706
value.variant_level+1)
707
return dbus.Dictionary(all, signature="sv")
708
1425
properties[name] = type(value)(
1426
value, variant_level=value.variant_level + 1)
1427
return dbus.Dictionary(properties, signature="sv")
1428
1429
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1430
def PropertiesChanged(self, interface_name, changed_properties,
1431
invalidated_properties):
1432
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1433
standard.
1434
"""
1435
pass
1436
709
1437
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
710
1438
out_signature="s",
711
1439
path_keyword='object_path',
712
1440
connection_keyword='connection')
713
1441
def Introspect(self, object_path, connection):
714
"""Standard D-Bus method, overloaded to insert property tags.
1442
"""Overloading of standard D-Bus method.
1443
1444
Inserts property tags and interface annotation tags.
715
1445
"""
716
xmlstring = dbus.service.Object.Introspect(self, object_path,
717
connection)
1446
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1447
object_path,
1448
connection)
718
1449
try:
719
1450
document = xml.dom.minidom.parseString(xmlstring)
1451
720
1452
def make_tag(document, name, prop):
721
1453
e = document.createElement("property")
722
1454
e.setAttribute("name", name)
723
1455
e.setAttribute("type", prop._dbus_signature)
724
1456
e.setAttribute("access", prop._dbus_access)
725
1457
return e
1458
726
1459
for if_tag in document.getElementsByTagName("interface"):
1460
# Add property tags
727
1461
for tag in (make_tag(document, name, prop)
728
1462
for name, prop
729
in self._get_all_dbus_properties()
1463
in self._get_all_dbus_things("property")
730
1464
if prop._dbus_interface
731
1465
== if_tag.getAttribute("name")):
732
1466
if_tag.appendChild(tag)
1467
# Add annotation tags for properties
1468
for tag in if_tag.getElementsByTagName("property"):
1469
annots = dict()
1470
for name, prop in self._get_all_dbus_things(
1471
"property"):
1472
if (name == tag.getAttribute("name")
1473
and prop._dbus_interface
1474
== if_tag.getAttribute("name")):
1475
annots.update(getattr(
1476
prop, "_dbus_annotations", {}))
1477
for name, value in annots.items():
1478
ann_tag = document.createElement(
1479
"annotation")
1480
ann_tag.setAttribute("name", name)
1481
ann_tag.setAttribute("value", value)
1482
tag.appendChild(ann_tag)
733
1483
# Add the names to the return values for the
734
1484
# "org.freedesktop.DBus.Properties" methods
735
1485
if (if_tag.getAttribute("name")
750
1500
except (AttributeError, xml.dom.DOMException,
751
1501
xml.parsers.expat.ExpatError) as error:
752
1502
logger.error("Failed to override Introspection method",
753
error)
754
return xmlstring
755
756
757
def datetime_to_dbus (dt, variant_level=0):
1503
exc_info=error)
1504
return xmlstring
1505
1506
1507
try:
1508
dbus.OBJECT_MANAGER_IFACE
1509
except AttributeError:
1510
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1511
1512
1513
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1514
"""A D-Bus object with an ObjectManager.
1515
1516
Classes inheriting from this exposes the standard
1517
GetManagedObjects call and the InterfacesAdded and
1518
InterfacesRemoved signals on the standard
1519
"org.freedesktop.DBus.ObjectManager" interface.
1520
1521
Note: No signals are sent automatically; they must be sent
1522
manually.
1523
"""
1524
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1525
out_signature="a{oa{sa{sv}}}")
1526
def GetManagedObjects(self):
1527
"""This function must be overridden"""
1528
raise NotImplementedError()
1529
1530
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1531
signature="oa{sa{sv}}")
1532
def InterfacesAdded(self, object_path, interfaces_and_properties):
1533
pass
1534
1535
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1536
def InterfacesRemoved(self, object_path, interfaces):
1537
pass
1538
1539
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1540
out_signature="s",
1541
path_keyword='object_path',
1542
connection_keyword='connection')
1543
def Introspect(self, object_path, connection):
1544
"""Overloading of standard D-Bus method.
1545
1546
Override return argument name of GetManagedObjects to be
1547
"objpath_interfaces_and_properties"
1548
"""
1549
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1550
object_path,
1551
connection)
1552
try:
1553
document = xml.dom.minidom.parseString(xmlstring)
1554
1555
for if_tag in document.getElementsByTagName("interface"):
1556
# Fix argument name for the GetManagedObjects method
1557
if (if_tag.getAttribute("name")
1558
== dbus.OBJECT_MANAGER_IFACE):
1559
for cn in if_tag.getElementsByTagName("method"):
1560
if (cn.getAttribute("name")
1561
== "GetManagedObjects"):
1562
for arg in cn.getElementsByTagName("arg"):
1563
if (arg.getAttribute("direction")
1564
== "out"):
1565
arg.setAttribute(
1566
"name",
1567
"objpath_interfaces"
1568
"_and_properties")
1569
xmlstring = document.toxml("utf-8")
1570
document.unlink()
1571
except (AttributeError, xml.dom.DOMException,
1572
xml.parsers.expat.ExpatError) as error:
1573
logger.error("Failed to override Introspection method",
1574
exc_info=error)
1575
return xmlstring
1576
1577
1578
def datetime_to_dbus(dt, variant_level=0):
758
1579
"""Convert a UTC datetime.datetime() to a D-Bus type."""
759
1580
if dt is None:
760
return dbus.String("", variant_level = variant_level)
761
return dbus.String(dt.isoformat(),
762
variant_level=variant_level)
763
764
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
765
.__metaclass__):
766
"""Applied to an empty subclass of a D-Bus object, this metaclass
767
will add additional D-Bus attributes matching a certain pattern.
1581
return dbus.String("", variant_level=variant_level)
1582
return dbus.String(dt.isoformat(), variant_level=variant_level)
1583
1584
1585
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1586
"""A class decorator; applied to a subclass of
1587
dbus.service.Object, it will add alternate D-Bus attributes with
1588
interface names according to the "alt_interface_names" mapping.
1589
Usage:
1590
1591
@alternate_dbus_interfaces({"org.example.Interface":
1592
"net.example.AlternateInterface"})
1593
class SampleDBusObject(dbus.service.Object):
1594
@dbus.service.method("org.example.Interface")
1595
def SampleDBusMethod():
1596
pass
1597
1598
The above "SampleDBusMethod" on "SampleDBusObject" will be
1599
reachable via two interfaces: "org.example.Interface" and
1600
"net.example.AlternateInterface", the latter of which will have
1601
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1602
"true", unless "deprecate" is passed with a False value.
1603
1604
This works for methods and signals, and also for D-Bus properties
1605
(from DBusObjectWithProperties) and interfaces (from the
1606
dbus_interface_annotations decorator).
768
1607
"""
769
def __new__(mcs, name, bases, attr):
770
# Go through all the base classes which could have D-Bus
771
# methods, signals, or properties in them
772
for base in (b for b in bases
773
if issubclass(b, dbus.service.Object)):
774
# Go though all attributes of the base class
775
for attrname, attribute in inspect.getmembers(base):
1608
1609
def wrapper(cls):
1610
for orig_interface_name, alt_interface_name in (
1611
alt_interface_names.items()):
1612
attr = {}
1613
interface_names = set()
1614
# Go though all attributes of the class
1615
for attrname, attribute in inspect.getmembers(cls):
776
1616
# Ignore non-D-Bus attributes, and D-Bus attributes
777
1617
# with the wrong interface name
778
1618
if (not hasattr(attribute, "_dbus_interface")
779
or not attribute._dbus_interface
780
.startswith("se.recompile.Mandos")):
1619
or not attribute._dbus_interface.startswith(
1620
orig_interface_name)):
781
1621
continue
782
1622
# Create an alternate D-Bus interface name based on
783
1623
# the current name
784
alt_interface = (attribute._dbus_interface
785
.replace("se.recompile.Mandos",
786
"se.bsnet.fukt.Mandos"))
1624
alt_interface = attribute._dbus_interface.replace(
1625
orig_interface_name, alt_interface_name)
1626
interface_names.add(alt_interface)
787
1627
# Is this a D-Bus signal?
788
1628
if getattr(attribute, "_dbus_is_signal", False):
789
# Extract the original non-method function by
790
# black magic
791
nonmethod_func = (dict(
1629
# Extract the original non-method undecorated
1630
# function by black magic
1631
if sys.version_info.major == 2:
1632
nonmethod_func = (dict(
792
1633
zip(attribute.func_code.co_freevars,
793
attribute.__closure__))["func"]
794
.cell_contents)
1634
attribute.__closure__))
1635
["func"].cell_contents)
1636
else:
1637
nonmethod_func = (dict(
1638
zip(attribute.__code__.co_freevars,
1639
attribute.__closure__))
1640
["func"].cell_contents)
795
1641
# Create a new, but exactly alike, function
796
1642
# object, and decorate it to be a new D-Bus signal
797
1643
# with the alternate D-Bus interface name
798
new_function = (dbus.service.signal
799
(alt_interface,
800
attribute._dbus_signature)
801
(types.FunctionType(
802
nonmethod_func.func_code,
803
nonmethod_func.func_globals,
804
nonmethod_func.func_name,
805
nonmethod_func.func_defaults,
806
nonmethod_func.func_closure)))
1644
new_function = copy_function(nonmethod_func)
1645
new_function = (dbus.service.signal(
1646
alt_interface,
1647
attribute._dbus_signature)(new_function))
1648
# Copy annotations, if any
1649
try:
1650
new_function._dbus_annotations = dict(
1651
attribute._dbus_annotations)
1652
except AttributeError:
1653
pass
1654
807
1655
# Define a creator of a function to call both the
808
# old and new functions, so both the old and new
809
# signals gets sent when the function is called
1656
# original and alternate functions, so both the
1657
# original and alternate signals gets sent when
1658
# the function is called
810
1659
def fixscope(func1, func2):
811
1660
"""This function is a scope container to pass
812
1661
func1 and func2 to the "call_both" function
813
1662
outside of its arguments"""
1663
1664
@functools.wraps(func2)
814
1665
def call_both(*args, **kwargs):
815
1666
"""This function will emit two D-Bus
816
1667
signals by calling func1 and func2"""
817
1668
func1(*args, **kwargs)
818
1669
func2(*args, **kwargs)
1670
# Make wrapper function look like a D-Bus
1671
# signal
1672
for name, attr in inspect.getmembers(func2):
1673
if name.startswith("_dbus_"):
1674
setattr(call_both, name, attr)
1675
819
1676
return call_both
820
1677
# Create the "call_both" function and add it to
821
1678
# the class
822
attr[attrname] = fixscope(attribute,
823
new_function)
1679
attr[attrname] = fixscope(attribute, new_function)
824
1680
# Is this a D-Bus method?
825
1681
elif getattr(attribute, "_dbus_is_method", False):
826
1682
# Create a new, but exactly alike, function
827
1683
# object. Decorate it to be a new D-Bus method
828
1684
# with the alternate D-Bus interface name. Add it
829
1685
# to the class.
830
attr[attrname] = (dbus.service.method
831
(alt_interface,
832
attribute._dbus_in_signature,
833
attribute._dbus_out_signature)
834
(types.FunctionType
835
(attribute.func_code,
836
attribute.func_globals,
837
attribute.func_name,
838
attribute.func_defaults,
839
attribute.func_closure)))
1686
attr[attrname] = (
1687
dbus.service.method(
1688
alt_interface,
1689
attribute._dbus_in_signature,
1690
attribute._dbus_out_signature)
1691
(copy_function(attribute)))
1692
# Copy annotations, if any
1693
try:
1694
attr[attrname]._dbus_annotations = dict(
1695
attribute._dbus_annotations)
1696
except AttributeError:
1697
pass
840
1698
# Is this a D-Bus property?
841
1699
elif getattr(attribute, "_dbus_is_property", False):
842
1700
# Create a new, but exactly alike, function
843
1701
# object, and decorate it to be a new D-Bus
844
1702
# property with the alternate D-Bus interface
845
1703
# name. Add it to the class.
846
attr[attrname] = (dbus_service_property
847
(alt_interface,
848
attribute._dbus_signature,
849
attribute._dbus_access,
850
attribute
851
._dbus_get_args_options
852
["byte_arrays"])
853
(types.FunctionType
854
(attribute.func_code,
855
attribute.func_globals,
856
attribute.func_name,
857
attribute.func_defaults,
858
attribute.func_closure)))
859
return type.__new__(mcs, name, bases, attr)
860
1704
attr[attrname] = (dbus_service_property(
1705
alt_interface, attribute._dbus_signature,
1706
attribute._dbus_access,
1707
attribute._dbus_get_args_options
1708
["byte_arrays"])
1709
(copy_function(attribute)))
1710
# Copy annotations, if any
1711
try:
1712
attr[attrname]._dbus_annotations = dict(
1713
attribute._dbus_annotations)
1714
except AttributeError:
1715
pass
1716
# Is this a D-Bus interface?
1717
elif getattr(attribute, "_dbus_is_interface", False):
1718
# Create a new, but exactly alike, function
1719
# object. Decorate it to be a new D-Bus interface
1720
# with the alternate D-Bus interface name. Add it
1721
# to the class.
1722
attr[attrname] = (
1723
dbus_interface_annotations(alt_interface)
1724
(copy_function(attribute)))
1725
if deprecate:
1726
# Deprecate all alternate interfaces
1727
iname = "_AlternateDBusNames_interface_annotation{}"
1728
for interface_name in interface_names:
1729
1730
@dbus_interface_annotations(interface_name)
1731
def func(self):
1732
return {"org.freedesktop.DBus.Deprecated":
1733
"true"}
1734
# Find an unused name
1735
for aname in (iname.format(i)
1736
for i in itertools.count()):
1737
if aname not in attr:
1738
attr[aname] = func
1739
break
1740
if interface_names:
1741
# Replace the class with a new subclass of it with
1742
# methods, signals, etc. as created above.
1743
if sys.version_info.major == 2:
1744
cls = type(b"{}Alternate".format(cls.__name__),
1745
(cls, ), attr)
1746
else:
1747
cls = type("{}Alternate".format(cls.__name__),
1748
(cls, ), attr)
1749
return cls
1750
1751
return wrapper
1752
1753
1754
@alternate_dbus_interfaces({"se.recompile.Mandos":
1755
"se.bsnet.fukt.Mandos"})
861
1756
class ClientDBus(Client, DBusObjectWithProperties):
862
1757
"""A Client class using D-Bus
863
1758
864
1759
Attributes:
865
1760
dbus_object_path: dbus.ObjectPath
866
1761
bus: dbus.SystemBus()
867
1762
"""
868
1763
869
1764
runtime_expansions = (Client.runtime_expansions
870
+ ("dbus_object_path",))
871
1765
+ ("dbus_object_path", ))
1766
1767
_interface = "se.recompile.Mandos.Client"
1768
872
1769
# dbus.service.Object doesn't use super(), so we can't either.
873
874
def __init__(self, bus = None, *args, **kwargs):
875
self._approvals_pending = 0
1770
1771
def __init__(self, bus=None, *args, **kwargs):
876
1772
self.bus = bus
877
1773
Client.__init__(self, *args, **kwargs)
878
1774
# Only now, when this client is initialized, can it show up on
879
1775
# the D-Bus
880
client_object_name = unicode(self.name).translate(
1776
client_object_name = str(self.name).translate(
881
1777
{ord("."): ord("_"),
882
1778
ord("-"): ord("_")})
883
self.dbus_object_path = (dbus.ObjectPath
884
("/clients/" + client_object_name))
1779
self.dbus_object_path = dbus.ObjectPath(
1780
"/clients/" + client_object_name)
885
1781
DBusObjectWithProperties.__init__(self, self.bus,
886
1782
self.dbus_object_path)
887
888
def notifychangeproperty(transform_func,
889
dbus_name, type_func=lambda x: x,
890
variant_level=1):
1783
1784
def notifychangeproperty(transform_func, dbus_name,
1785
type_func=lambda x: x,
1786
variant_level=1,
1787
invalidate_only=False,
1788
_interface=_interface):
891
1789
""" Modify a variable so that it's a property which announces
892
1790
its changes to DBus.
893
1791
894
transform_fun: Function that takes a value and transforms it
895
to a D-Bus type.
1792
transform_fun: Function that takes a value and a variant_level
1793
and transforms it to a D-Bus type.
896
1794
dbus_name: D-Bus name of the variable
897
1795
type_func: Function that transform the value before sending it
898
1796
to the D-Bus. Default: no transform
899
1797
variant_level: D-Bus variant level. Default: 1
900
1798
"""
901
attrname = "_{0}".format(dbus_name)
1799
attrname = "_{}".format(dbus_name)
1800
902
1801
def setter(self, value):
903
1802
if hasattr(self, "dbus_object_path"):
904
1803
if (not hasattr(self, attrname) or
905
1804
type_func(getattr(self, attrname, None))
906
1805
!= type_func(value)):
907
dbus_value = transform_func(type_func(value),
908
variant_level)
909
self.PropertyChanged(dbus.String(dbus_name),
910
dbus_value)
1806
if invalidate_only:
1807
self.PropertiesChanged(
1808
_interface, dbus.Dictionary(),
1809
dbus.Array((dbus_name, )))
1810
else:
1811
dbus_value = transform_func(
1812
type_func(value),
1813
variant_level=variant_level)
1814
self.PropertyChanged(dbus.String(dbus_name),
1815
dbus_value)
1816
self.PropertiesChanged(
1817
_interface,
1818
dbus.Dictionary({dbus.String(dbus_name):
1819
dbus_value}),
1820
dbus.Array())
911
1821
setattr(self, attrname, value)
912
1822
913
1823
return property(lambda self: getattr(self, attrname), setter)
914
915
1824
916
1825
expires = notifychangeproperty(datetime_to_dbus, "Expires")
917
1826
approvals_pending = notifychangeproperty(dbus.Boolean,
918
1827
"ApprovalPending",
919
type_func = bool)
1828
type_func=bool)
920
1829
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
921
1830
last_enabled = notifychangeproperty(datetime_to_dbus,
922
1831
"LastEnabled")
923
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
924
type_func = lambda checker:
925
checker is not None)
1832
checker = notifychangeproperty(
1833
dbus.Boolean, "CheckerRunning",
1834
type_func=lambda checker: checker is not None)
926
1835
last_checked_ok = notifychangeproperty(datetime_to_dbus,
927
1836
"LastCheckedOK")
1837
last_checker_status = notifychangeproperty(dbus.Int16,
1838
"LastCheckerStatus")
928
1839
last_approval_request = notifychangeproperty(
929
1840
datetime_to_dbus, "LastApprovalRequest")
930
1841
approved_by_default = notifychangeproperty(dbus.Boolean,
931
1842
"ApprovedByDefault")
932
approval_delay = notifychangeproperty(dbus.UInt16,
933
"ApprovalDelay",
934
type_func =
935
_timedelta_to_milliseconds)
1843
approval_delay = notifychangeproperty(
1844
dbus.UInt64, "ApprovalDelay",
1845
type_func=lambda td: td.total_seconds() * 1000)
936
1846
approval_duration = notifychangeproperty(
937
dbus.UInt16, "ApprovalDuration",
938
type_func = _timedelta_to_milliseconds)
1847
dbus.UInt64, "ApprovalDuration",
1848
type_func=lambda td: td.total_seconds() * 1000)
939
1849
host = notifychangeproperty(dbus.String, "Host")
940
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
941
type_func =
942
_timedelta_to_milliseconds)
1850
timeout = notifychangeproperty(
1851
dbus.UInt64, "Timeout",
1852
type_func=lambda td: td.total_seconds() * 1000)
943
1853
extended_timeout = notifychangeproperty(
944
dbus.UInt16, "ExtendedTimeout",
945
type_func = _timedelta_to_milliseconds)
946
interval = notifychangeproperty(dbus.UInt16,
947
"Interval",
948
type_func =
949
_timedelta_to_milliseconds)
1854
dbus.UInt64, "ExtendedTimeout",
1855
type_func=lambda td: td.total_seconds() * 1000)
1856
interval = notifychangeproperty(
1857
dbus.UInt64, "Interval",
1858
type_func=lambda td: td.total_seconds() * 1000)
950
1859
checker_command = notifychangeproperty(dbus.String, "Checker")
951
1860
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1861
invalidate_only=True)
1862
952
1863
del notifychangeproperty
953
1864
954
1865
def __del__(self, *args, **kwargs):
955
1866
try:
956
1867
self.remove_from_connection()
959
1870
if hasattr(DBusObjectWithProperties, "__del__"):
960
1871
DBusObjectWithProperties.__del__(self, *args, **kwargs)
961
1872
Client.__del__(self, *args, **kwargs)
962
963
def checker_callback(self, pid, condition, command,
964
*args, **kwargs):
965
self.checker_callback_tag = None
966
self.checker = None
967
if os.WIFEXITED(condition):
968
exitstatus = os.WEXITSTATUS(condition)
1873
1874
def checker_callback(self, source, condition,
1875
connection, command, *args, **kwargs):
1876
ret = Client.checker_callback(self, source, condition,
1877
connection, command, *args,
1878
**kwargs)
1879
exitstatus = self.last_checker_status
1880
if exitstatus >= 0:
969
1881
# Emit D-Bus signal
970
1882
self.CheckerCompleted(dbus.Int16(exitstatus),
971
dbus.Int64(condition),
1883
# This is specific to GNU libC
1884
dbus.Int64(exitstatus << 8),
972
1885
dbus.String(command))
973
1886
else:
974
1887
# Emit D-Bus signal
975
1888
self.CheckerCompleted(dbus.Int16(-1),
976
dbus.Int64(condition),
1889
dbus.Int64(
1890
# This is specific to GNU libC
1891
(exitstatus << 8)
1892
| self.last_checker_signal),
977
1893
dbus.String(command))
978
979
return Client.checker_callback(self, pid, condition, command,
980
*args, **kwargs)
981
1894
return ret
1895
982
1896
def start_checker(self, *args, **kwargs):
983
old_checker = self.checker
984
if self.checker is not None:
985
old_checker_pid = self.checker.pid
986
else:
987
old_checker_pid = None
1897
old_checker_pid = getattr(self.checker, "pid", None)
988
1898
r = Client.start_checker(self, *args, **kwargs)
989
1899
# Only if new checker process was started
990
1900
if (self.checker is not None
992
1902
# Emit D-Bus signal
993
1903
self.CheckerStarted(self.current_checker_command)
994
1904
return r
995
1905
996
1906
def _reset_approved(self):
997
self._approved = None
1907
self.approved = None
998
1908
return False
999
1909
1000
1910
def approve(self, value=True):
1911
self.approved = value
1912
GLib.timeout_add(int(self.approval_duration.total_seconds()
1913
* 1000), self._reset_approved)
1001
1914
self.send_changedstate()
1002
self._approved = value
1003
gobject.timeout_add(_timedelta_to_milliseconds
1004
(self.approval_duration),
1005
self._reset_approved)
1006
1007
1008
## D-Bus methods, signals & properties
1009
_interface = "se.recompile.Mandos.Client"
1010
1011
## Signals
1012
1915
1916
# D-Bus methods, signals & properties
1917
1918
# Interfaces
1919
1920
# Signals
1921
1013
1922
# CheckerCompleted - signal
1014
1923
@dbus.service.signal(_interface, signature="nxs")
1015
1924
def CheckerCompleted(self, exitcode, waitstatus, command):
1016
1925
"D-Bus signal"
1017
1926
pass
1018
1927
1019
1928
# CheckerStarted - signal
1020
1929
@dbus.service.signal(_interface, signature="s")
1021
1930
def CheckerStarted(self, command):
1022
1931
"D-Bus signal"
1023
1932
pass
1024
1933
1025
1934
# PropertyChanged - signal
1935
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1026
1936
@dbus.service.signal(_interface, signature="sv")
1027
1937
def PropertyChanged(self, property, value):
1028
1938
"D-Bus signal"
1029
1939
pass
1030
1940
1031
1941
# GotSecret - signal
1032
1942
@dbus.service.signal(_interface)
1033
1943
def GotSecret(self):
1036
1946
server to mandos-client
1037
1947
"""
1038
1948
pass
1039
1949
1040
1950
# Rejected - signal
1041
1951
@dbus.service.signal(_interface, signature="s")
1042
1952
def Rejected(self, reason):
1043
1953
"D-Bus signal"
1044
1954
pass
1045
1955
1046
1956
# NeedApproval - signal
1047
1957
@dbus.service.signal(_interface, signature="tb")
1048
1958
def NeedApproval(self, timeout, default):
1049
1959
"D-Bus signal"
1050
1960
return self.need_approval()
1051
1052
## Methods
1053
1961
1962
# Methods
1963
1054
1964
# Approve - method
1055
1965
@dbus.service.method(_interface, in_signature="b")
1056
1966
def Approve(self, value):
1057
1967
self.approve(value)
1058
1968
1059
1969
# CheckedOK - method
1060
1970
@dbus.service.method(_interface)
1061
1971
def CheckedOK(self):
1062
1972
self.checked_ok()
1063
1973
1064
1974
# Enable - method
1975
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1065
1976
@dbus.service.method(_interface)
1066
1977
def Enable(self):
1067
1978
"D-Bus method"
1068
1979
self.enable()
1069
1980
1070
1981
# StartChecker - method
1982
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1071
1983
@dbus.service.method(_interface)
1072
1984
def StartChecker(self):
1073
1985
"D-Bus method"
1074
1986
self.start_checker()
1075
1987
1076
1988
# Disable - method
1989
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1077
1990
@dbus.service.method(_interface)
1078
1991
def Disable(self):
1079
1992
"D-Bus method"
1080
1993
self.disable()
1081
1994
1082
1995
# StopChecker - method
1996
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1083
1997
@dbus.service.method(_interface)
1084
1998
def StopChecker(self):
1085
1999
self.stop_checker()
1086
1087
## Properties
1088
2000
2001
# Properties
2002
1089
2003
# ApprovalPending - property
1090
2004
@dbus_service_property(_interface, signature="b", access="read")
1091
2005
def ApprovalPending_dbus_property(self):
1092
2006
return dbus.Boolean(bool(self.approvals_pending))
1093
2007
1094
2008
# ApprovedByDefault - property
1095
@dbus_service_property(_interface, signature="b",
2009
@dbus_service_property(_interface,
2010
signature="b",
1096
2011
access="readwrite")
1097
2012
def ApprovedByDefault_dbus_property(self, value=None):
1098
2013
if value is None: # get
1099
2014
return dbus.Boolean(self.approved_by_default)
1100
2015
self.approved_by_default = bool(value)
1101
2016
1102
2017
# ApprovalDelay - property
1103
@dbus_service_property(_interface, signature="t",
2018
@dbus_service_property(_interface,
2019
signature="t",
1104
2020
access="readwrite")
1105
2021
def ApprovalDelay_dbus_property(self, value=None):
1106
2022
if value is None: # get
1107
return dbus.UInt64(self.approval_delay_milliseconds())
2023
return dbus.UInt64(self.approval_delay.total_seconds()
2024
* 1000)
1108
2025
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1109
2026
1110
2027
# ApprovalDuration - property
1111
@dbus_service_property(_interface, signature="t",
2028
@dbus_service_property(_interface,
2029
signature="t",
1112
2030
access="readwrite")
1113
2031
def ApprovalDuration_dbus_property(self, value=None):
1114
2032
if value is None: # get
1115
return dbus.UInt64(_timedelta_to_milliseconds(
1116
self.approval_duration))
2033
return dbus.UInt64(self.approval_duration.total_seconds()
2034
* 1000)
1117
2035
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1118
2036
1119
2037
# Name - property
2038
@dbus_annotations(
2039
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1120
2040
@dbus_service_property(_interface, signature="s", access="read")
1121
2041
def Name_dbus_property(self):
1122
2042
return dbus.String(self.name)
1123
2043
2044
# KeyID - property
2045
@dbus_annotations(
2046
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2047
@dbus_service_property(_interface, signature="s", access="read")
2048
def KeyID_dbus_property(self):
2049
return dbus.String(self.key_id)
2050
1124
2051
# Fingerprint - property
2052
@dbus_annotations(
2053
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1125
2054
@dbus_service_property(_interface, signature="s", access="read")
1126
2055
def Fingerprint_dbus_property(self):
1127
2056
return dbus.String(self.fingerprint)
1128
2057
1129
2058
# Host - property
1130
@dbus_service_property(_interface, signature="s",
2059
@dbus_service_property(_interface,
2060
signature="s",
1131
2061
access="readwrite")
1132
2062
def Host_dbus_property(self, value=None):
1133
2063
if value is None: # get
1134
2064
return dbus.String(self.host)
1135
self.host = value
1136
2065
self.host = str(value)
2066
1137
2067
# Created - property
2068
@dbus_annotations(
2069
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1138
2070
@dbus_service_property(_interface, signature="s", access="read")
1139
2071
def Created_dbus_property(self):
1140
return dbus.String(datetime_to_dbus(self.created))
1141
2072
return datetime_to_dbus(self.created)
2073
1142
2074
# LastEnabled - property
1143
2075
@dbus_service_property(_interface, signature="s", access="read")
1144
2076
def LastEnabled_dbus_property(self):
1145
2077
return datetime_to_dbus(self.last_enabled)
1146
2078
1147
2079
# Enabled - property
1148
@dbus_service_property(_interface, signature="b",
2080
@dbus_service_property(_interface,
2081
signature="b",
1149
2082
access="readwrite")
1150
2083
def Enabled_dbus_property(self, value=None):
1151
2084
if value is None: # get
1154
2087
self.enable()
1155
2088
else:
1156
2089
self.disable()
1157
2090
1158
2091
# LastCheckedOK - property
1159
@dbus_service_property(_interface, signature="s",
2092
@dbus_service_property(_interface,
2093
signature="s",
1160
2094
access="readwrite")
1161
2095
def LastCheckedOK_dbus_property(self, value=None):
1162
2096
if value is not None:
1163
2097
self.checked_ok()
1164
2098
return
1165
2099
return datetime_to_dbus(self.last_checked_ok)
1166
2100
2101
# LastCheckerStatus - property
2102
@dbus_service_property(_interface, signature="n", access="read")
2103
def LastCheckerStatus_dbus_property(self):
2104
return dbus.Int16(self.last_checker_status)
2105
1167
2106
# Expires - property
1168
2107
@dbus_service_property(_interface, signature="s", access="read")
1169
2108
def Expires_dbus_property(self):
1170
2109
return datetime_to_dbus(self.expires)
1171
2110
1172
2111
# LastApprovalRequest - property
1173
2112
@dbus_service_property(_interface, signature="s", access="read")
1174
2113
def LastApprovalRequest_dbus_property(self):
1175
2114
return datetime_to_dbus(self.last_approval_request)
1176
2115
1177
2116
# Timeout - property
1178
@dbus_service_property(_interface, signature="t",
2117
@dbus_service_property(_interface,
2118
signature="t",
1179
2119
access="readwrite")
1180
2120
def Timeout_dbus_property(self, value=None):
1181
2121
if value is None: # get
1182
return dbus.UInt64(self.timeout_milliseconds())
2122
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2123
old_timeout = self.timeout
1183
2124
self.timeout = datetime.timedelta(0, 0, 0, value)
1184
if getattr(self, "disable_initiator_tag", None) is None:
1185
return
1186
# Reschedule timeout
1187
gobject.source_remove(self.disable_initiator_tag)
1188
self.disable_initiator_tag = None
1189
self.expires = None
1190
time_to_die = (self.
1191
_timedelta_to_milliseconds((self
1192
.last_checked_ok
1193
+ self.timeout)
1194
- datetime.datetime
1195
.utcnow()))
1196
if time_to_die <= 0:
1197
# The timeout has passed
1198
self.disable()
1199
else:
1200
self.expires = (datetime.datetime.utcnow()
1201
+ datetime.timedelta(milliseconds =
1202
time_to_die))
1203
self.disable_initiator_tag = (gobject.timeout_add
1204
(time_to_die, self.disable))
1205
2125
# Reschedule disabling
2126
if self.enabled:
2127
now = datetime.datetime.utcnow()
2128
self.expires += self.timeout - old_timeout
2129
if self.expires <= now:
2130
# The timeout has passed
2131
self.disable()
2132
else:
2133
if (getattr(self, "disable_initiator_tag", None)
2134
is None):
2135
return
2136
GLib.source_remove(self.disable_initiator_tag)
2137
self.disable_initiator_tag = GLib.timeout_add(
2138
int((self.expires - now).total_seconds() * 1000),
2139
self.disable)
2140
1206
2141
# ExtendedTimeout - property
1207
@dbus_service_property(_interface, signature="t",
2142
@dbus_service_property(_interface,
2143
signature="t",
1208
2144
access="readwrite")
1209
2145
def ExtendedTimeout_dbus_property(self, value=None):
1210
2146
if value is None: # get
1211
return dbus.UInt64(self.extended_timeout_milliseconds())
2147
return dbus.UInt64(self.extended_timeout.total_seconds()
2148
* 1000)
1212
2149
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1213
2150
1214
2151
# Interval - property
1215
@dbus_service_property(_interface, signature="t",
2152
@dbus_service_property(_interface,
2153
signature="t",
1216
2154
access="readwrite")
1217
2155
def Interval_dbus_property(self, value=None):
1218
2156
if value is None: # get
1219
return dbus.UInt64(self.interval_milliseconds())
2157
return dbus.UInt64(self.interval.total_seconds() * 1000)
1220
2158
self.interval = datetime.timedelta(0, 0, 0, value)
1221
2159
if getattr(self, "checker_initiator_tag", None) is None:
1222
2160
return
1223
# Reschedule checker run
1224
gobject.source_remove(self.checker_initiator_tag)
1225
self.checker_initiator_tag = (gobject.timeout_add
1226
(value, self.start_checker))
1227
self.start_checker() # Start one now, too
1228
2161
if self.enabled:
2162
# Reschedule checker run
2163
GLib.source_remove(self.checker_initiator_tag)
2164
self.checker_initiator_tag = GLib.timeout_add(
2165
value, self.start_checker)
2166
self.start_checker() # Start one now, too
2167
1229
2168
# Checker - property
1230
@dbus_service_property(_interface, signature="s",
2169
@dbus_service_property(_interface,
2170
signature="s",
1231
2171
access="readwrite")
1232
2172
def Checker_dbus_property(self, value=None):
1233
2173
if value is None: # get
1234
2174
return dbus.String(self.checker_command)
1235
self.checker_command = value
1236
2175
self.checker_command = str(value)
2176
1237
2177
# CheckerRunning - property
1238
@dbus_service_property(_interface, signature="b",
2178
@dbus_service_property(_interface,
2179
signature="b",
1239
2180
access="readwrite")
1240
2181
def CheckerRunning_dbus_property(self, value=None):
1241
2182
if value is None: # get
1244
2185
self.start_checker()
1245
2186
else:
1246
2187
self.stop_checker()
1247
2188
1248
2189
# ObjectPath - property
2190
@dbus_annotations(
2191
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2192
"org.freedesktop.DBus.Deprecated": "true"})
1249
2193
@dbus_service_property(_interface, signature="o", access="read")
1250
2194
def ObjectPath_dbus_property(self):
1251
return self.dbus_object_path # is already a dbus.ObjectPath
1252
2195
return self.dbus_object_path # is already a dbus.ObjectPath
2196
1253
2197
# Secret = property
1254
@dbus_service_property(_interface, signature="ay",
1255
access="write", byte_arrays=True)
2198
@dbus_annotations(
2199
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2200
"invalidates"})
2201
@dbus_service_property(_interface,
2202
signature="ay",
2203
access="write",
2204
byte_arrays=True)
1256
2205
def Secret_dbus_property(self, value):
1257
self.secret = str(value)
1258
2206
self.secret = bytes(value)
2207
1259
2208
del _interface
1260
2209
1261
2210
1262
2211
class ProxyClient(object):
1263
def __init__(self, child_pipe, fpr, address):
2212
def __init__(self, child_pipe, key_id, fpr, address):
1264
2213
self._pipe = child_pipe
1265
self._pipe.send(('init', fpr, address))
2214
self._pipe.send(('init', key_id, fpr, address))
1266
2215
if not self._pipe.recv():
1267
raise KeyError()
1268
2216
raise KeyError(key_id or fpr)
2217
1269
2218
def __getattribute__(self, name):
1270
if(name == '_pipe'):
2219
if name == '_pipe':
1271
2220
return super(ProxyClient, self).__getattribute__(name)
1272
2221
self._pipe.send(('getattr', name))
1273
2222
data = self._pipe.recv()
1274
2223
if data[0] == 'data':
1275
2224
return data[1]
1276
2225
if data[0] == 'function':
2226
1277
2227
def func(*args, **kwargs):
1278
2228
self._pipe.send(('funcall', name, args, kwargs))
1279
2229
return self._pipe.recv()[1]
2230
1280
2231
return func
1281
2232
1282
2233
def __setattr__(self, name, value):
1283
if(name == '_pipe'):
2234
if name == '_pipe':
1284
2235
return super(ProxyClient, self).__setattr__(name, value)
1285
2236
self._pipe.send(('setattr', name, value))
1286
2237
1287
class ClientDBusTransitional(ClientDBus):
1288
__metaclass__ = AlternateDBusNamesMetaclass
1289
2238
1290
2239
class ClientHandler(socketserver.BaseRequestHandler, object):
1291
2240
"""A class to handle client connections.
1292
2241
1293
2242
Instantiated once for each connection to handle it.
1294
2243
Note: This will run in its own forked process."""
1295
2244
1296
2245
def handle(self):
1297
2246
with contextlib.closing(self.server.child_pipe) as child_pipe:
1298
2247
logger.info("TCP connection from: %s",
1299
unicode(self.client_address))
2248
str(self.client_address))
1300
2249
logger.debug("Pipe FD: %d",
1301
2250
self.server.child_pipe.fileno())
1302
1303
session = (gnutls.connection
1304
.ClientSession(self.request,
1305
gnutls.connection
1306
.X509Credentials()))
1307
1308
# Note: gnutls.connection.X509Credentials is really a
1309
# generic GnuTLS certificate credentials object so long as
1310
# no X.509 keys are added to it. Therefore, we can use it
1311
# here despite using OpenPGP certificates.
1312
1313
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1314
# "+AES-256-CBC", "+SHA1",
1315
# "+COMP-NULL", "+CTYPE-OPENPGP",
1316
# "+DHE-DSS"))
2251
2252
session = gnutls.ClientSession(self.request)
2253
2254
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2255
# "+AES-256-CBC", "+SHA1",
2256
# "+COMP-NULL", "+CTYPE-OPENPGP",
2257
# "+DHE-DSS"))
1317
2258
# Use a fallback default, since this MUST be set.
1318
2259
priority = self.server.gnutls_priority
1319
2260
if priority is None:
1320
2261
priority = "NORMAL"
1321
(gnutls.library.functions
1322
.gnutls_priority_set_direct(session._c_object,
1323
priority, None))
1324
2262
gnutls.priority_set_direct(session._c_object,
2263
priority.encode("utf-8"),
2264
None)
2265
1325
2266
# Start communication using the Mandos protocol
1326
2267
# Get protocol number
1327
2268
line = self.request.makefile().readline()
1328
2269
logger.debug("Protocol version: %r", line)
1329
2270
try:
1330
2271
if int(line.strip().split()[0]) > 1:
1331
raise RuntimeError
2272
raise RuntimeError(line)
1332
2273
except (ValueError, IndexError, RuntimeError) as error:
1333
2274
logger.error("Unknown protocol version: %s", error)
1334
2275
return
1335
2276
1336
2277
# Start GnuTLS connection
1337
2278
try:
1338
2279
session.handshake()
1339
except gnutls.errors.GNUTLSError as error:
2280
except gnutls.Error as error:
1340
2281
logger.warning("Handshake failed: %s", error)
1341
2282
# Do not run session.bye() here: the session is not
1342
2283
# established. Just abandon the request.
1343
2284
return
1344
2285
logger.debug("Handshake succeeded")
1345
2286
1346
2287
approval_required = False
1347
2288
try:
1348
try:
1349
fpr = self.fingerprint(self.peer_certificate
1350
(session))
1351
except (TypeError,
1352
gnutls.errors.GNUTLSError) as error:
1353
logger.warning("Bad certificate: %s", error)
1354
return
1355
logger.debug("Fingerprint: %s", fpr)
1356
1357
try:
1358
client = ProxyClient(child_pipe, fpr,
2289
if gnutls.has_rawpk:
2290
fpr = ""
2291
try:
2292
key_id = self.key_id(
2293
self.peer_certificate(session))
2294
except (TypeError, gnutls.Error) as error:
2295
logger.warning("Bad certificate: %s", error)
2296
return
2297
logger.debug("Key ID: %s", key_id)
2298
2299
else:
2300
key_id = ""
2301
try:
2302
fpr = self.fingerprint(
2303
self.peer_certificate(session))
2304
except (TypeError, gnutls.Error) as error:
2305
logger.warning("Bad certificate: %s", error)
2306
return
2307
logger.debug("Fingerprint: %s", fpr)
2308
2309
try:
2310
client = ProxyClient(child_pipe, key_id, fpr,
1359
2311
self.client_address)
1360
2312
except KeyError:
1361
2313
return
1362
2314
1363
2315
if client.approval_delay:
1364
2316
delay = client.approval_delay
1365
2317
client.approvals_pending += 1
1366
2318
approval_required = True
1367
2319
1368
2320
while True:
1369
2321
if not client.enabled:
1370
2322
logger.info("Client %s is disabled",
1371
client.name)
2323
client.name)
1372
2324
if self.server.use_dbus:
1373
2325
# Emit D-Bus signal
1374
2326
client.Rejected("Disabled")
1375
2327
return
1376
1377
if client._approved or not client.approval_delay:
1378
#We are approved or approval is disabled
2328
2329
if client.approved or not client.approval_delay:
2330
# We are approved or approval is disabled
1379
2331
break
1380
elif client._approved is None:
2332
elif client.approved is None:
1381
2333
logger.info("Client %s needs approval",
1382
2334
client.name)
1383
2335
if self.server.use_dbus:
1384
2336
# Emit D-Bus signal
1385
2337
client.NeedApproval(
1386
client.approval_delay_milliseconds(),
1387
client.approved_by_default)
2338
client.approval_delay.total_seconds()
2339
* 1000, client.approved_by_default)
1388
2340
else:
1389
2341
logger.warning("Client %s was not approved",
1390
2342
client.name)
1392
2344
# Emit D-Bus signal
1393
2345
client.Rejected("Denied")
1394
2346
return
1395
1396
#wait until timeout or approved
1397
#x = float(client
1398
# ._timedelta_to_milliseconds(delay))
2347
2348
# wait until timeout or approved
1399
2349
time = datetime.datetime.now()
1400
2350
client.changedstate.acquire()
1401
(client.changedstate.wait
1402
(float(client._timedelta_to_milliseconds(delay)
1403
/ 1000)))
2351
client.changedstate.wait(delay.total_seconds())
1404
2352
client.changedstate.release()
1405
2353
time2 = datetime.datetime.now()
1406
2354
if (time2 - time) >= delay:
1416
2364
break
1417
2365
else:
1418
2366
delay -= time2 - time
1419
1420
sent_size = 0
1421
while sent_size < len(client.secret):
1422
try:
1423
sent = session.send(client.secret[sent_size:])
1424
except gnutls.errors.GNUTLSError as error:
1425
logger.warning("gnutls send failed")
1426
return
1427
logger.debug("Sent: %d, remaining: %d",
1428
sent, len(client.secret)
1429
- (sent_size + sent))
1430
sent_size += sent
1431
2367
2368
try:
2369
session.send(client.secret)
2370
except gnutls.Error as error:
2371
logger.warning("gnutls send failed",
2372
exc_info=error)
2373
return
2374
1432
2375
logger.info("Sending secret to %s", client.name)
1433
# bump the timeout as if seen
1434
client.checked_ok(client.extended_timeout)
2376
# bump the timeout using extended_timeout
2377
client.bump_timeout(client.extended_timeout)
1435
2378
if self.server.use_dbus:
1436
2379
# Emit D-Bus signal
1437
2380
client.GotSecret()
1438
2381
1439
2382
finally:
1440
2383
if approval_required:
1441
2384
client.approvals_pending -= 1
1442
2385
try:
1443
2386
session.bye()
1444
except gnutls.errors.GNUTLSError as error:
1445
logger.warning("GnuTLS bye failed")
1446
2387
except gnutls.Error as error:
2388
logger.warning("GnuTLS bye failed",
2389
exc_info=error)
2390
1447
2391
@staticmethod
1448
2392
def peer_certificate(session):
1449
"Return the peer's OpenPGP certificate as a bytestring"
1450
# If not an OpenPGP certificate...
1451
if (gnutls.library.functions
1452
.gnutls_certificate_type_get(session._c_object)
1453
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1454
# ...do the normal thing
1455
return session.peer_certificate
2393
"Return the peer's certificate as a bytestring"
2394
try:
2395
cert_type = gnutls.certificate_type_get2(session._c_object,
2396
gnutls.CTYPE_PEERS)
2397
except AttributeError:
2398
cert_type = gnutls.certificate_type_get(session._c_object)
2399
if gnutls.has_rawpk:
2400
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2401
else:
2402
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2403
# If not a valid certificate type...
2404
if cert_type not in valid_cert_types:
2405
logger.info("Cert type %r not in %r", cert_type,
2406
valid_cert_types)
2407
# ...return invalid data
2408
return b""
1456
2409
list_size = ctypes.c_uint(1)
1457
cert_list = (gnutls.library.functions
1458
.gnutls_certificate_get_peers
2410
cert_list = (gnutls.certificate_get_peers
1459
2411
(session._c_object, ctypes.byref(list_size)))
1460
2412
if not bool(cert_list) and list_size.value != 0:
1461
raise gnutls.errors.GNUTLSError("error getting peer"
1462
" certificate")
2413
raise gnutls.Error("error getting peer certificate")
1463
2414
if list_size.value == 0:
1464
2415
return None
1465
2416
cert = cert_list[0]
1466
2417
return ctypes.string_at(cert.data, cert.size)
1467
2418
2419
@staticmethod
2420
def key_id(certificate):
2421
"Convert a certificate bytestring to a hexdigit key ID"
2422
# New GnuTLS "datum" with the public key
2423
datum = gnutls.datum_t(
2424
ctypes.cast(ctypes.c_char_p(certificate),
2425
ctypes.POINTER(ctypes.c_ubyte)),
2426
ctypes.c_uint(len(certificate)))
2427
# XXX all these need to be created in the gnutls "module"
2428
# New empty GnuTLS certificate
2429
pubkey = gnutls.pubkey_t()
2430
gnutls.pubkey_init(ctypes.byref(pubkey))
2431
# Import the raw public key into the certificate
2432
gnutls.pubkey_import(pubkey,
2433
ctypes.byref(datum),
2434
gnutls.X509_FMT_DER)
2435
# New buffer for the key ID
2436
buf = ctypes.create_string_buffer(32)
2437
buf_len = ctypes.c_size_t(len(buf))
2438
# Get the key ID from the raw public key into the buffer
2439
gnutls.pubkey_get_key_id(pubkey,
2440
gnutls.KEYID_USE_SHA256,
2441
ctypes.cast(ctypes.byref(buf),
2442
ctypes.POINTER(ctypes.c_ubyte)),
2443
ctypes.byref(buf_len))
2444
# Deinit the certificate
2445
gnutls.pubkey_deinit(pubkey)
2446
2447
# Convert the buffer to a Python bytestring
2448
key_id = ctypes.string_at(buf, buf_len.value)
2449
# Convert the bytestring to hexadecimal notation
2450
hex_key_id = binascii.hexlify(key_id).upper()
2451
return hex_key_id
2452
1468
2453
@staticmethod
1469
2454
def fingerprint(openpgp):
1470
2455
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1471
2456
# New GnuTLS "datum" with the OpenPGP public key
1472
datum = (gnutls.library.types
1473
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1474
ctypes.POINTER
1475
(ctypes.c_ubyte)),
1476
ctypes.c_uint(len(openpgp))))
2457
datum = gnutls.datum_t(
2458
ctypes.cast(ctypes.c_char_p(openpgp),
2459
ctypes.POINTER(ctypes.c_ubyte)),
2460
ctypes.c_uint(len(openpgp)))
1477
2461
# New empty GnuTLS certificate
1478
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1479
(gnutls.library.functions
1480
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2462
crt = gnutls.openpgp_crt_t()
2463
gnutls.openpgp_crt_init(ctypes.byref(crt))
1481
2464
# Import the OpenPGP public key into the certificate
1482
(gnutls.library.functions
1483
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1484
gnutls.library.constants
1485
.GNUTLS_OPENPGP_FMT_RAW))
2465
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2466
gnutls.OPENPGP_FMT_RAW)
1486
2467
# Verify the self signature in the key
1487
2468
crtverify = ctypes.c_uint()
1488
(gnutls.library.functions
1489
.gnutls_openpgp_crt_verify_self(crt, 0,
1490
ctypes.byref(crtverify)))
2469
gnutls.openpgp_crt_verify_self(crt, 0,
2470
ctypes.byref(crtverify))
1491
2471
if crtverify.value != 0:
1492
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1493
raise (gnutls.errors.CertificateSecurityError
1494
("Verify failed"))
2472
gnutls.openpgp_crt_deinit(crt)
2473
raise gnutls.CertificateSecurityError(code
2474
=crtverify.value)
1495
2475
# New buffer for the fingerprint
1496
2476
buf = ctypes.create_string_buffer(20)
1497
2477
buf_len = ctypes.c_size_t()
1498
2478
# Get the fingerprint from the certificate into the buffer
1499
(gnutls.library.functions
1500
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1501
ctypes.byref(buf_len)))
2479
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2480
ctypes.byref(buf_len))
1502
2481
# Deinit the certificate
1503
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2482
gnutls.openpgp_crt_deinit(crt)
1504
2483
# Convert the buffer to a Python bytestring
1505
2484
fpr = ctypes.string_at(buf, buf_len.value)
1506
2485
# Convert the bytestring to hexadecimal notation
1507
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2486
hex_fpr = binascii.hexlify(fpr).upper()
1508
2487
return hex_fpr
1509
2488
1510
2489
1511
2490
class MultiprocessingMixIn(object):
1512
2491
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2492
1513
2493
def sub_process_main(self, request, address):
1514
2494
try:
1515
2495
self.finish_request(request, address)
1516
except:
2496
except Exception:
1517
2497
self.handle_error(request, address)
1518
2498
self.close_request(request)
1519
2499
1520
2500
def process_request(self, request, address):
1521
2501
"""Start a new process to process the request."""
1522
multiprocessing.Process(target = self.sub_process_main,
1523
args = (request, address)).start()
2502
proc = multiprocessing.Process(target=self.sub_process_main,
2503
args=(request, address))
2504
proc.start()
2505
return proc
1524
2506
1525
2507
1526
2508
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1527
2509
""" adds a pipe to the MixIn """
2510
1528
2511
def process_request(self, request, client_address):
1529
2512
"""Overrides and wraps the original process_request().
1530
2513
1531
2514
This function creates a new pipe in self.pipe
1532
2515
"""
1533
2516
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1534
1535
super(MultiprocessingMixInWithPipe,
1536
self).process_request(request, client_address)
2517
2518
proc = MultiprocessingMixIn.process_request(self, request,
2519
client_address)
1537
2520
self.child_pipe.close()
1538
self.add_pipe(parent_pipe)
1539
1540
def add_pipe(self, parent_pipe):
2521
self.add_pipe(parent_pipe, proc)
2522
2523
def add_pipe(self, parent_pipe, proc):
1541
2524
"""Dummy function; override as necessary"""
1542
raise NotImplementedError
2525
raise NotImplementedError()
1543
2526
1544
2527
1545
2528
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1546
2529
socketserver.TCPServer, object):
1547
2530
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1548
2531
1549
2532
Attributes:
1550
2533
enabled: Boolean; whether this server is activated yet
1551
2534
interface: None or a network interface name (string)
1552
2535
use_ipv6: Boolean; to use IPv6 or not
1553
2536
"""
2537
1554
2538
def __init__(self, server_address, RequestHandlerClass,
1555
interface=None, use_ipv6=True):
2539
interface=None,
2540
use_ipv6=True,
2541
socketfd=None):
2542
"""If socketfd is set, use that file descriptor instead of
2543
creating a new one with socket.socket().
2544
"""
1556
2545
self.interface = interface
1557
2546
if use_ipv6:
1558
2547
self.address_family = socket.AF_INET6
2548
if socketfd is not None:
2549
# Save the file descriptor
2550
self.socketfd = socketfd
2551
# Save the original socket.socket() function
2552
self.socket_socket = socket.socket
2553
2554
# To implement --socket, we monkey patch socket.socket.
2555
#
2556
# (When socketserver.TCPServer is a new-style class, we
2557
# could make self.socket into a property instead of monkey
2558
# patching socket.socket.)
2559
#
2560
# Create a one-time-only replacement for socket.socket()
2561
@functools.wraps(socket.socket)
2562
def socket_wrapper(*args, **kwargs):
2563
# Restore original function so subsequent calls are
2564
# not affected.
2565
socket.socket = self.socket_socket
2566
del self.socket_socket
2567
# This time only, return a new socket object from the
2568
# saved file descriptor.
2569
return socket.fromfd(self.socketfd, *args, **kwargs)
2570
# Replace socket.socket() function with wrapper
2571
socket.socket = socket_wrapper
2572
# The socketserver.TCPServer.__init__ will call
2573
# socket.socket(), which might be our replacement,
2574
# socket_wrapper(), if socketfd was set.
1559
2575
socketserver.TCPServer.__init__(self, server_address,
1560
2576
RequestHandlerClass)
2577
1561
2578
def server_bind(self):
1562
2579
"""This overrides the normal server_bind() function
1563
2580
to bind to an interface if one was specified, and also NOT to
1564
2581
bind to an address or port if they were not specified."""
2582
global SO_BINDTODEVICE
1565
2583
if self.interface is not None:
1566
2584
if SO_BINDTODEVICE is None:
1567
logger.error("SO_BINDTODEVICE does not exist;"
1568
" cannot bind to interface %s",
1569
self.interface)
1570
else:
1571
try:
1572
self.socket.setsockopt(socket.SOL_SOCKET,
1573
SO_BINDTODEVICE,
1574
str(self.interface
1575
+ '\0'))
1576
except socket.error as error:
1577
if error[0] == errno.EPERM:
1578
logger.error("No permission to"
1579
" bind to interface %s",
1580
self.interface)
1581
elif error[0] == errno.ENOPROTOOPT:
1582
logger.error("SO_BINDTODEVICE not available;"
1583
" cannot bind to interface %s",
1584
self.interface)
1585
else:
1586
raise
2585
# Fall back to a hard-coded value which seems to be
2586
# common enough.
2587
logger.warning("SO_BINDTODEVICE not found, trying 25")
2588
SO_BINDTODEVICE = 25
2589
try:
2590
self.socket.setsockopt(
2591
socket.SOL_SOCKET, SO_BINDTODEVICE,
2592
(self.interface + "\0").encode("utf-8"))
2593
except socket.error as error:
2594
if error.errno == errno.EPERM:
2595
logger.error("No permission to bind to"
2596
" interface %s", self.interface)
2597
elif error.errno == errno.ENOPROTOOPT:
2598
logger.error("SO_BINDTODEVICE not available;"
2599
" cannot bind to interface %s",
2600
self.interface)
2601
elif error.errno == errno.ENODEV:
2602
logger.error("Interface %s does not exist,"
2603
" cannot bind", self.interface)
2604
else:
2605
raise
1587
2606
# Only bind(2) the socket if we really need to.
1588
2607
if self.server_address[0] or self.server_address[1]:
1589
2608
if not self.server_address[0]:
1590
2609
if self.address_family == socket.AF_INET6:
1591
any_address = "::" # in6addr_any
2610
any_address = "::" # in6addr_any
1592
2611
else:
1593
any_address = socket.INADDR_ANY
2612
any_address = "0.0.0.0" # INADDR_ANY
1594
2613
self.server_address = (any_address,
1595
2614
self.server_address[1])
1596
2615
elif not self.server_address[1]:
1597
self.server_address = (self.server_address[0],
1598
0)
2616
self.server_address = (self.server_address[0], 0)
1599
2617
# if self.interface:
1600
2618
# self.server_address = (self.server_address[0],
1601
2619
# 0, # port
1607
2625
1608
2626
class MandosServer(IPv6_TCPServer):
1609
2627
"""Mandos server.
1610
2628
1611
2629
Attributes:
1612
2630
clients: set of Client objects
1613
2631
gnutls_priority GnuTLS priority string
1614
2632
use_dbus: Boolean; to emit D-Bus signals or not
1615
1616
Assumes a gobject.MainLoop event loop.
2633
2634
Assumes a GLib.MainLoop event loop.
1617
2635
"""
2636
1618
2637
def __init__(self, server_address, RequestHandlerClass,
1619
interface=None, use_ipv6=True, clients=None,
1620
gnutls_priority=None, use_dbus=True):
2638
interface=None,
2639
use_ipv6=True,
2640
clients=None,
2641
gnutls_priority=None,
2642
use_dbus=True,
2643
socketfd=None):
1621
2644
self.enabled = False
1622
2645
self.clients = clients
1623
2646
if self.clients is None:
1624
self.clients = set()
2647
self.clients = {}
1625
2648
self.use_dbus = use_dbus
1626
2649
self.gnutls_priority = gnutls_priority
1627
2650
IPv6_TCPServer.__init__(self, server_address,
1628
2651
RequestHandlerClass,
1629
interface = interface,
1630
use_ipv6 = use_ipv6)
2652
interface=interface,
2653
use_ipv6=use_ipv6,
2654
socketfd=socketfd)
2655
1631
2656
def server_activate(self):
1632
2657
if self.enabled:
1633
2658
return socketserver.TCPServer.server_activate(self)
2659
1634
2660
def enable(self):
1635
2661
self.enabled = True
1636
def add_pipe(self, parent_pipe):
2662
2663
def add_pipe(self, parent_pipe, proc):
1637
2664
# Call "handle_ipc" for both data and EOF events
1638
gobject.io_add_watch(parent_pipe.fileno(),
1639
gobject.IO_IN | gobject.IO_HUP,
1640
functools.partial(self.handle_ipc,
1641
parent_pipe =
1642
parent_pipe))
1643
1644
def handle_ipc(self, source, condition, parent_pipe=None,
2665
GLib.io_add_watch(
2666
parent_pipe.fileno(),
2667
GLib.IO_IN | GLib.IO_HUP,
2668
functools.partial(self.handle_ipc,
2669
parent_pipe=parent_pipe,
2670
proc=proc))
2671
2672
def handle_ipc(self, source, condition,
2673
parent_pipe=None,
2674
proc=None,
1645
2675
client_object=None):
1646
condition_names = {
1647
gobject.IO_IN: "IN", # There is data to read.
1648
gobject.IO_OUT: "OUT", # Data can be written (without
1649
# blocking).
1650
gobject.IO_PRI: "PRI", # There is urgent data to read.
1651
gobject.IO_ERR: "ERR", # Error condition.
1652
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1653
# broken, usually for pipes and
1654
# sockets).
1655
}
1656
conditions_string = ' | '.join(name
1657
for cond, name in
1658
condition_names.iteritems()
1659
if cond & condition)
1660
# error or the other end of multiprocessing.Pipe has closed
1661
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2676
# error, or the other end of multiprocessing.Pipe has closed
2677
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2678
# Wait for other process to exit
2679
proc.join()
1662
2680
return False
1663
2681
1664
2682
# Read a request from the child
1665
2683
request = parent_pipe.recv()
1666
2684
command = request[0]
1667
2685
1668
2686
if command == 'init':
1669
fpr = request[1]
1670
address = request[2]
1671
1672
for c in self.clients:
1673
if c.fingerprint == fpr:
2687
key_id = request[1].decode("ascii")
2688
fpr = request[2].decode("ascii")
2689
address = request[3]
2690
2691
for c in self.clients.values():
2692
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2693
continue
2694
if key_id and c.key_id == key_id:
2695
client = c
2696
break
2697
if fpr and c.fingerprint == fpr:
1674
2698
client = c
1675
2699
break
1676
2700
else:
1677
logger.info("Client not found for fingerprint: %s, ad"
1678
"dress: %s", fpr, address)
2701
logger.info("Client not found for key ID: %s, address"
2702
": %s", key_id or fpr, address)
1679
2703
if self.use_dbus:
1680
2704
# Emit D-Bus signal
1681
mandos_dbus_service.ClientNotFound(fpr,
2705
mandos_dbus_service.ClientNotFound(key_id or fpr,
1682
2706
address[0])
1683
2707
parent_pipe.send(False)
1684
2708
return False
1685
1686
gobject.io_add_watch(parent_pipe.fileno(),
1687
gobject.IO_IN | gobject.IO_HUP,
1688
functools.partial(self.handle_ipc,
1689
parent_pipe =
1690
parent_pipe,
1691
client_object =
1692
client))
2709
2710
GLib.io_add_watch(
2711
parent_pipe.fileno(),
2712
GLib.IO_IN | GLib.IO_HUP,
2713
functools.partial(self.handle_ipc,
2714
parent_pipe=parent_pipe,
2715
proc=proc,
2716
client_object=client))
1693
2717
parent_pipe.send(True)
1694
2718
# remove the old hook in favor of the new above hook on
1695
2719
# same fileno
1698
2722
funcname = request[1]
1699
2723
args = request[2]
1700
2724
kwargs = request[3]
1701
2725
1702
2726
parent_pipe.send(('data', getattr(client_object,
1703
2727
funcname)(*args,
1704
**kwargs)))
1705
2728
**kwargs)))
2729
1706
2730
if command == 'getattr':
1707
2731
attrname = request[1]
1708
if callable(client_object.__getattribute__(attrname)):
1709
parent_pipe.send(('function',))
2732
if isinstance(client_object.__getattribute__(attrname),
2733
collections.Callable):
2734
parent_pipe.send(('function', ))
1710
2735
else:
1711
parent_pipe.send(('data', client_object
1712
.__getattribute__(attrname)))
1713
2736
parent_pipe.send((
2737
'data', client_object.__getattribute__(attrname)))
2738
1714
2739
if command == 'setattr':
1715
2740
attrname = request[1]
1716
2741
value = request[2]
1717
2742
setattr(client_object, attrname, value)
1718
2743
1719
2744
return True
1720
2745
1721
2746
2747
def rfc3339_duration_to_delta(duration):
2748
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2749
2750
>>> rfc3339_duration_to_delta("P7D")
2751
datetime.timedelta(7)
2752
>>> rfc3339_duration_to_delta("PT60S")
2753
datetime.timedelta(0, 60)
2754
>>> rfc3339_duration_to_delta("PT60M")
2755
datetime.timedelta(0, 3600)
2756
>>> rfc3339_duration_to_delta("PT24H")
2757
datetime.timedelta(1)
2758
>>> rfc3339_duration_to_delta("P1W")
2759
datetime.timedelta(7)
2760
>>> rfc3339_duration_to_delta("PT5M30S")
2761
datetime.timedelta(0, 330)
2762
>>> rfc3339_duration_to_delta("P1DT3M20S")
2763
datetime.timedelta(1, 200)
2764
"""
2765
2766
# Parsing an RFC 3339 duration with regular expressions is not
2767
# possible - there would have to be multiple places for the same
2768
# values, like seconds. The current code, while more esoteric, is
2769
# cleaner without depending on a parsing library. If Python had a
2770
# built-in library for parsing we would use it, but we'd like to
2771
# avoid excessive use of external libraries.
2772
2773
# New type for defining tokens, syntax, and semantics all-in-one
2774
Token = collections.namedtuple("Token", (
2775
"regexp", # To match token; if "value" is not None, must have
2776
# a "group" containing digits
2777
"value", # datetime.timedelta or None
2778
"followers")) # Tokens valid after this token
2779
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2780
# the "duration" ABNF definition in RFC 3339, Appendix A.
2781
token_end = Token(re.compile(r"$"), None, frozenset())
2782
token_second = Token(re.compile(r"(\d+)S"),
2783
datetime.timedelta(seconds=1),
2784
frozenset((token_end, )))
2785
token_minute = Token(re.compile(r"(\d+)M"),
2786
datetime.timedelta(minutes=1),
2787
frozenset((token_second, token_end)))
2788
token_hour = Token(re.compile(r"(\d+)H"),
2789
datetime.timedelta(hours=1),
2790
frozenset((token_minute, token_end)))
2791
token_time = Token(re.compile(r"T"),
2792
None,
2793
frozenset((token_hour, token_minute,
2794
token_second)))
2795
token_day = Token(re.compile(r"(\d+)D"),
2796
datetime.timedelta(days=1),
2797
frozenset((token_time, token_end)))
2798
token_month = Token(re.compile(r"(\d+)M"),
2799
datetime.timedelta(weeks=4),
2800
frozenset((token_day, token_end)))
2801
token_year = Token(re.compile(r"(\d+)Y"),
2802
datetime.timedelta(weeks=52),
2803
frozenset((token_month, token_end)))
2804
token_week = Token(re.compile(r"(\d+)W"),
2805
datetime.timedelta(weeks=1),
2806
frozenset((token_end, )))
2807
token_duration = Token(re.compile(r"P"), None,
2808
frozenset((token_year, token_month,
2809
token_day, token_time,
2810
token_week)))
2811
# Define starting values:
2812
# Value so far
2813
value = datetime.timedelta()
2814
found_token = None
2815
# Following valid tokens
2816
followers = frozenset((token_duration, ))
2817
# String left to parse
2818
s = duration
2819
# Loop until end token is found
2820
while found_token is not token_end:
2821
# Search for any currently valid tokens
2822
for token in followers:
2823
match = token.regexp.match(s)
2824
if match is not None:
2825
# Token found
2826
if token.value is not None:
2827
# Value found, parse digits
2828
factor = int(match.group(1), 10)
2829
# Add to value so far
2830
value += factor * token.value
2831
# Strip token from string
2832
s = token.regexp.sub("", s, 1)
2833
# Go to found token
2834
found_token = token
2835
# Set valid next tokens
2836
followers = found_token.followers
2837
break
2838
else:
2839
# No currently valid tokens were found
2840
raise ValueError("Invalid RFC 3339 duration: {!r}"
2841
.format(duration))
2842
# End token found
2843
return value
2844
2845
1722
2846
def string_to_delta(interval):
1723
2847
"""Parse a string and return a datetime.timedelta
1724
2848
1725
2849
>>> string_to_delta('7d')
1726
2850
datetime.timedelta(7)
1727
2851
>>> string_to_delta('60s')
1735
2859
>>> string_to_delta('5m 30s')
1736
2860
datetime.timedelta(0, 330)
1737
2861
"""
2862
2863
try:
2864
return rfc3339_duration_to_delta(interval)
2865
except ValueError:
2866
pass
2867
1738
2868
timevalue = datetime.timedelta(0)
1739
2869
for s in interval.split():
1740
2870
try:
1741
suffix = unicode(s[-1])
2871
suffix = s[-1]
1742
2872
value = int(s[:-1])
1743
2873
if suffix == "d":
1744
2874
delta = datetime.timedelta(value)
1751
2881
elif suffix == "w":
1752
2882
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1753
2883
else:
1754
raise ValueError("Unknown suffix %r" % suffix)
1755
except (ValueError, IndexError) as e:
2884
raise ValueError("Unknown suffix {!r}".format(suffix))
2885
except IndexError as e:
1756
2886
raise ValueError(*(e.args))
1757
2887
timevalue += delta
1758
2888
return timevalue
1759
2889
1760
2890
1761
def if_nametoindex(interface):
1762
"""Call the C function if_nametoindex(), or equivalent
1763
1764
Note: This function cannot accept a unicode string."""
1765
global if_nametoindex
1766
try:
1767
if_nametoindex = (ctypes.cdll.LoadLibrary
1768
(ctypes.util.find_library("c"))
1769
.if_nametoindex)
1770
except (OSError, AttributeError):
1771
logger.warning("Doing if_nametoindex the hard way")
1772
def if_nametoindex(interface):
1773
"Get an interface index the hard way, i.e. using fcntl()"
1774
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1775
with contextlib.closing(socket.socket()) as s:
1776
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1777
struct.pack(str("16s16x"),
1778
interface))
1779
interface_index = struct.unpack(str("I"),
1780
ifreq[16:20])[0]
1781
return interface_index
1782
return if_nametoindex(interface)
1783
1784
1785
def daemon(nochdir = False, noclose = False):
2891
def daemon(nochdir=False, noclose=False):
1786
2892
"""See daemon(3). Standard BSD Unix function.
1787
2893
1788
2894
This should really exist as os.daemon, but it doesn't (yet)."""
1789
2895
if os.fork():
1790
2896
sys.exit()
1795
2901
sys.exit()
1796
2902
if not noclose:
1797
2903
# Close all standard open file descriptors
1798
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2904
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1799
2905
if not stat.S_ISCHR(os.fstat(null).st_mode):
1800
2906
raise OSError(errno.ENODEV,
1801
"%s not a character device"
1802
% os.path.devnull)
2907
"{} not a character device"
2908
.format(os.devnull))
1803
2909
os.dup2(null, sys.stdin.fileno())
1804
2910
os.dup2(null, sys.stdout.fileno())
1805
2911
os.dup2(null, sys.stderr.fileno())
1808
2914
1809
2915
1810
2916
def main():
1811
2917
1812
2918
##################################################################
1813
2919
# Parsing of options, both command line and config file
1814
2920
1815
2921
parser = argparse.ArgumentParser()
1816
2922
parser.add_argument("-v", "--version", action="version",
1817
version = "%%(prog)s %s" % version,
2923
version="%(prog)s {}".format(version),
1818
2924
help="show version number and exit")
1819
2925
parser.add_argument("-i", "--interface", metavar="IF",
1820
2926
help="Bind to interface IF")
1826
2932
help="Run self-test")
1827
2933
parser.add_argument("--debug", action="store_true",
1828
2934
help="Debug mode; run in foreground and log"
1829
" to terminal")
2935
" to terminal", default=None)
1830
2936
parser.add_argument("--debuglevel", metavar="LEVEL",
1831
2937
help="Debug level for stdout output")
1832
2938
parser.add_argument("--priority", help="GnuTLS"
1839
2945
" files")
1840
2946
parser.add_argument("--no-dbus", action="store_false",
1841
2947
dest="use_dbus", help="Do not provide D-Bus"
1842
" system bus interface")
2948
" system bus interface", default=None)
1843
2949
parser.add_argument("--no-ipv6", action="store_false",
1844
dest="use_ipv6", help="Do not use IPv6")
2950
dest="use_ipv6", help="Do not use IPv6",
2951
default=None)
2952
parser.add_argument("--no-restore", action="store_false",
2953
dest="restore", help="Do not restore stored"
2954
" state", default=None)
2955
parser.add_argument("--socket", type=int,
2956
help="Specify a file descriptor to a network"
2957
" socket to use instead of creating one")
2958
parser.add_argument("--statedir", metavar="DIR",
2959
help="Directory to save/restore state in")
2960
parser.add_argument("--foreground", action="store_true",
2961
help="Run in foreground", default=None)
2962
parser.add_argument("--no-zeroconf", action="store_false",
2963
dest="zeroconf", help="Do not use Zeroconf",
2964
default=None)
2965
1845
2966
options = parser.parse_args()
1846
2967
1847
2968
if options.check:
1848
2969
import doctest
1849
doctest.testmod()
1850
sys.exit()
1851
2970
fail_count, test_count = doctest.testmod()
2971
sys.exit(os.EX_OK if fail_count == 0 else 1)
2972
1852
2973
# Default values for config file for server-global settings
1853
server_defaults = { "interface": "",
1854
"address": "",
1855
"port": "",
1856
"debug": "False",
1857
"priority":
1858
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1859
"servicename": "Mandos",
1860
"use_dbus": "True",
1861
"use_ipv6": "True",
1862
"debuglevel": "",
1863
}
1864
2974
if gnutls.has_rawpk:
2975
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2976
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2977
else:
2978
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2979
":+SIGN-DSA-SHA256")
2980
server_defaults = {"interface": "",
2981
"address": "",
2982
"port": "",
2983
"debug": "False",
2984
"priority": priority,
2985
"servicename": "Mandos",
2986
"use_dbus": "True",
2987
"use_ipv6": "True",
2988
"debuglevel": "",
2989
"restore": "True",
2990
"socket": "",
2991
"statedir": "/var/lib/mandos",
2992
"foreground": "False",
2993
"zeroconf": "True",
2994
}
2995
del priority
2996
1865
2997
# Parse config file for server-global settings
1866
2998
server_config = configparser.SafeConfigParser(server_defaults)
1867
2999
del server_defaults
1868
server_config.read(os.path.join(options.configdir,
1869
"mandos.conf"))
3000
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1870
3001
# Convert the SafeConfigParser object to a dict
1871
3002
server_settings = server_config.defaults()
1872
3003
# Use the appropriate methods on the non-string config options
1873
for option in ("debug", "use_dbus", "use_ipv6"):
3004
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3005
"foreground", "zeroconf"):
1874
3006
server_settings[option] = server_config.getboolean("DEFAULT",
1875
3007
option)
1876
3008
if server_settings["port"]:
1877
3009
server_settings["port"] = server_config.getint("DEFAULT",
1878
3010
"port")
3011
if server_settings["socket"]:
3012
server_settings["socket"] = server_config.getint("DEFAULT",
3013
"socket")
3014
# Later, stdin will, and stdout and stderr might, be dup'ed
3015
# over with an opened os.devnull. But we don't want this to
3016
# happen with a supplied network socket.
3017
if 0 <= server_settings["socket"] <= 2:
3018
server_settings["socket"] = os.dup(server_settings
3019
["socket"])
1879
3020
del server_config
1880
3021
1881
3022
# Override the settings from the config file with command line
1882
3023
# options, if set.
1883
3024
for option in ("interface", "address", "port", "debug",
1884
"priority", "servicename", "configdir",
1885
"use_dbus", "use_ipv6", "debuglevel"):
3025
"priority", "servicename", "configdir", "use_dbus",
3026
"use_ipv6", "debuglevel", "restore", "statedir",
3027
"socket", "foreground", "zeroconf"):
1886
3028
value = getattr(options, option)
1887
3029
if value is not None:
1888
3030
server_settings[option] = value
1889
3031
del options
1890
3032
# Force all strings to be unicode
1891
3033
for option in server_settings.keys():
1892
if type(server_settings[option]) is str:
1893
server_settings[option] = unicode(server_settings[option])
3034
if isinstance(server_settings[option], bytes):
3035
server_settings[option] = (server_settings[option]
3036
.decode("utf-8"))
3037
# Force all boolean options to be boolean
3038
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3039
"foreground", "zeroconf"):
3040
server_settings[option] = bool(server_settings[option])
3041
# Debug implies foreground
3042
if server_settings["debug"]:
3043
server_settings["foreground"] = True
1894
3044
# Now we have our good server settings in "server_settings"
1895
3045
1896
3046
##################################################################
1897
3047
3048
if (not server_settings["zeroconf"]
3049
and not (server_settings["port"]
3050
or server_settings["socket"] != "")):
3051
parser.error("Needs port or socket to work without Zeroconf")
3052
1898
3053
# For convenience
1899
3054
debug = server_settings["debug"]
1900
3055
debuglevel = server_settings["debuglevel"]
1901
3056
use_dbus = server_settings["use_dbus"]
1902
3057
use_ipv6 = server_settings["use_ipv6"]
1903
3058
stored_state_path = os.path.join(server_settings["statedir"],
3059
stored_state_file)
3060
foreground = server_settings["foreground"]
3061
zeroconf = server_settings["zeroconf"]
3062
3063
if debug:
3064
initlogger(debug, logging.DEBUG)
3065
else:
3066
if not debuglevel:
3067
initlogger(debug)
3068
else:
3069
level = getattr(logging, debuglevel.upper())
3070
initlogger(debug, level)
3071
1904
3072
if server_settings["servicename"] != "Mandos":
1905
syslogger.setFormatter(logging.Formatter
1906
('Mandos (%s) [%%(process)d]:'
1907
' %%(levelname)s: %%(message)s'
1908
% server_settings["servicename"]))
1909
3073
syslogger.setFormatter(
3074
logging.Formatter('Mandos ({}) [%(process)d]:'
3075
' %(levelname)s: %(message)s'.format(
3076
server_settings["servicename"])))
3077
1910
3078
# Parse config file with clients
1911
client_defaults = { "timeout": "5m",
1912
"extended_timeout": "15m",
1913
"interval": "2m",
1914
"checker": "fping -q -- %%(host)s",
1915
"host": "",
1916
"approval_delay": "0s",
1917
"approval_duration": "1s",
1918
}
1919
client_config = configparser.SafeConfigParser(client_defaults)
3079
client_config = configparser.SafeConfigParser(Client
3080
.client_defaults)
1920
3081
client_config.read(os.path.join(server_settings["configdir"],
1921
3082
"clients.conf"))
1922
3083
1923
3084
global mandos_dbus_service
1924
3085
mandos_dbus_service = None
1925
1926
tcp_server = MandosServer((server_settings["address"],
1927
server_settings["port"]),
1928
ClientHandler,
1929
interface=(server_settings["interface"]
1930
or None),
1931
use_ipv6=use_ipv6,
1932
gnutls_priority=
1933
server_settings["priority"],
1934
use_dbus=use_dbus)
1935
if not debug:
1936
pidfilename = "/var/run/mandos.pid"
1937
try:
1938
pidfile = open(pidfilename, "w")
1939
except IOError:
1940
logger.error("Could not open file %r", pidfilename)
1941
1942
try:
1943
uid = pwd.getpwnam("_mandos").pw_uid
1944
gid = pwd.getpwnam("_mandos").pw_gid
1945
except KeyError:
1946
try:
1947
uid = pwd.getpwnam("mandos").pw_uid
1948
gid = pwd.getpwnam("mandos").pw_gid
3086
3087
socketfd = None
3088
if server_settings["socket"] != "":
3089
socketfd = server_settings["socket"]
3090
tcp_server = MandosServer(
3091
(server_settings["address"], server_settings["port"]),
3092
ClientHandler,
3093
interface=(server_settings["interface"] or None),
3094
use_ipv6=use_ipv6,
3095
gnutls_priority=server_settings["priority"],
3096
use_dbus=use_dbus,
3097
socketfd=socketfd)
3098
if not foreground:
3099
pidfilename = "/run/mandos.pid"
3100
if not os.path.isdir("/run/."):
3101
pidfilename = "/var/run/mandos.pid"
3102
pidfile = None
3103
try:
3104
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3105
except IOError as e:
3106
logger.error("Could not open file %r", pidfilename,
3107
exc_info=e)
3108
3109
for name, group in (("_mandos", "_mandos"),
3110
("mandos", "mandos"),
3111
("nobody", "nogroup")):
3112
try:
3113
uid = pwd.getpwnam(name).pw_uid
3114
gid = pwd.getpwnam(group).pw_gid
3115
break
1949
3116
except KeyError:
1950
try:
1951
uid = pwd.getpwnam("nobody").pw_uid
1952
gid = pwd.getpwnam("nobody").pw_gid
1953
except KeyError:
1954
uid = 65534
1955
gid = 65534
3117
continue
3118
else:
3119
uid = 65534
3120
gid = 65534
1956
3121
try:
1957
3122
os.setgid(gid)
1958
3123
os.setuid(uid)
3124
if debug:
3125
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3126
gid))
1959
3127
except OSError as error:
1960
if error[0] != errno.EPERM:
1961
raise error
1962
1963
if not debug and not debuglevel:
1964
syslogger.setLevel(logging.WARNING)
1965
console.setLevel(logging.WARNING)
1966
if debuglevel:
1967
level = getattr(logging, debuglevel.upper())
1968
syslogger.setLevel(level)
1969
console.setLevel(level)
1970
3128
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3129
.format(uid, gid, os.strerror(error.errno)))
3130
if error.errno != errno.EPERM:
3131
raise
3132
1971
3133
if debug:
1972
3134
# Enable all possible GnuTLS debugging
1973
3135
1974
3136
# "Use a log level over 10 to enable all debugging options."
1975
3137
# - GnuTLS manual
1976
gnutls.library.functions.gnutls_global_set_log_level(11)
1977
1978
@gnutls.library.types.gnutls_log_func
3138
gnutls.global_set_log_level(11)
3139
3140
@gnutls.log_func
1979
3141
def debug_gnutls(level, string):
1980
3142
logger.debug("GnuTLS: %s", string[:-1])
1981
1982
(gnutls.library.functions
1983
.gnutls_global_set_log_function(debug_gnutls))
1984
3143
3144
gnutls.global_set_log_function(debug_gnutls)
3145
1985
3146
# Redirect stdin so all checkers get /dev/null
1986
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3147
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1987
3148
os.dup2(null, sys.stdin.fileno())
1988
3149
if null > 2:
1989
3150
os.close(null)
1990
else:
1991
# No console logging
1992
logger.removeHandler(console)
1993
3151
1994
3152
# Need to fork before connecting to D-Bus
1995
if not debug:
3153
if not foreground:
1996
3154
# Close all input and output, do double fork, etc.
1997
3155
daemon()
1998
3156
3157
# multiprocessing will use threads, so before we use GLib we need
3158
# to inform GLib that threads will be used.
3159
GLib.threads_init()
3160
1999
3161
global main_loop
2000
3162
# From the Avahi example code
2001
DBusGMainLoop(set_as_default=True )
2002
main_loop = gobject.MainLoop()
3163
DBusGMainLoop(set_as_default=True)
3164
main_loop = GLib.MainLoop()
2003
3165
bus = dbus.SystemBus()
2004
3166
# End of Avahi example code
2005
3167
if use_dbus:
2006
3168
try:
2007
3169
bus_name = dbus.service.BusName("se.recompile.Mandos",
2008
bus, do_not_queue=True)
2009
old_bus_name = (dbus.service.BusName
2010
("se.bsnet.fukt.Mandos", bus,
2011
do_not_queue=True))
2012
except dbus.exceptions.NameExistsException as e:
2013
logger.error(unicode(e) + ", disabling D-Bus")
3170
bus,
3171
do_not_queue=True)
3172
old_bus_name = dbus.service.BusName(
3173
"se.bsnet.fukt.Mandos", bus,
3174
do_not_queue=True)
3175
except dbus.exceptions.DBusException as e:
3176
logger.error("Disabling D-Bus:", exc_info=e)
2014
3177
use_dbus = False
2015
3178
server_settings["use_dbus"] = False
2016
3179
tcp_server.use_dbus = False
2017
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2018
service = AvahiService(name = server_settings["servicename"],
2019
servicetype = "_mandos._tcp",
2020
protocol = protocol, bus = bus)
2021
if server_settings["interface"]:
2022
service.interface = (if_nametoindex
2023
(str(server_settings["interface"])))
2024
3180
if zeroconf:
3181
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3182
service = AvahiServiceToSyslog(
3183
name=server_settings["servicename"],
3184
servicetype="_mandos._tcp",
3185
protocol=protocol,
3186
bus=bus)
3187
if server_settings["interface"]:
3188
service.interface = if_nametoindex(
3189
server_settings["interface"].encode("utf-8"))
3190
2025
3191
global multiprocessing_manager
2026
3192
multiprocessing_manager = multiprocessing.Manager()
2027
3193
2028
3194
client_class = Client
2029
3195
if use_dbus:
2030
client_class = functools.partial(ClientDBusTransitional,
2031
bus = bus)
2032
def client_config_items(config, section):
2033
special_settings = {
2034
"approved_by_default":
2035
lambda: config.getboolean(section,
2036
"approved_by_default"),
2037
}
2038
for name, value in config.items(section):
3196
client_class = functools.partial(ClientDBus, bus=bus)
3197
3198
client_settings = Client.config_parser(client_config)
3199
old_client_settings = {}
3200
clients_data = {}
3201
3202
# This is used to redirect stdout and stderr for checker processes
3203
global wnull
3204
wnull = open(os.devnull, "w") # A writable /dev/null
3205
# Only used if server is running in foreground but not in debug
3206
# mode
3207
if debug or not foreground:
3208
wnull.close()
3209
3210
# Get client data and settings from last running state.
3211
if server_settings["restore"]:
3212
try:
3213
with open(stored_state_path, "rb") as stored_state:
3214
if sys.version_info.major == 2:
3215
clients_data, old_client_settings = pickle.load(
3216
stored_state)
3217
else:
3218
bytes_clients_data, bytes_old_client_settings = (
3219
pickle.load(stored_state, encoding="bytes"))
3220
# Fix bytes to strings
3221
# clients_data
3222
# .keys()
3223
clients_data = {(key.decode("utf-8")
3224
if isinstance(key, bytes)
3225
else key): value
3226
for key, value in
3227
bytes_clients_data.items()}
3228
del bytes_clients_data
3229
for key in clients_data:
3230
value = {(k.decode("utf-8")
3231
if isinstance(k, bytes) else k): v
3232
for k, v in
3233
clients_data[key].items()}
3234
clients_data[key] = value
3235
# .client_structure
3236
value["client_structure"] = [
3237
(s.decode("utf-8")
3238
if isinstance(s, bytes)
3239
else s) for s in
3240
value["client_structure"]]
3241
# .name & .host
3242
for k in ("name", "host"):
3243
if isinstance(value[k], bytes):
3244
value[k] = value[k].decode("utf-8")
3245
if not value.has_key("key_id"):
3246
value["key_id"] = ""
3247
elif not value.has_key("fingerprint"):
3248
value["fingerprint"] = ""
3249
# old_client_settings
3250
# .keys()
3251
old_client_settings = {
3252
(key.decode("utf-8")
3253
if isinstance(key, bytes)
3254
else key): value
3255
for key, value in
3256
bytes_old_client_settings.items()}
3257
del bytes_old_client_settings
3258
# .host
3259
for value in old_client_settings.values():
3260
if isinstance(value["host"], bytes):
3261
value["host"] = (value["host"]
3262
.decode("utf-8"))
3263
os.remove(stored_state_path)
3264
except IOError as e:
3265
if e.errno == errno.ENOENT:
3266
logger.warning("Could not load persistent state:"
3267
" {}".format(os.strerror(e.errno)))
3268
else:
3269
logger.critical("Could not load persistent state:",
3270
exc_info=e)
3271
raise
3272
except EOFError as e:
3273
logger.warning("Could not load persistent state: "
3274
"EOFError:",
3275
exc_info=e)
3276
3277
with PGPEngine() as pgp:
3278
for client_name, client in clients_data.items():
3279
# Skip removed clients
3280
if client_name not in client_settings:
3281
continue
3282
3283
# Decide which value to use after restoring saved state.
3284
# We have three different values: Old config file,
3285
# new config file, and saved state.
3286
# New config value takes precedence if it differs from old
3287
# config value, otherwise use saved state.
3288
for name, value in client_settings[client_name].items():
3289
try:
3290
# For each value in new config, check if it
3291
# differs from the old config value (Except for
3292
# the "secret" attribute)
3293
if (name != "secret"
3294
and (value !=
3295
old_client_settings[client_name][name])):
3296
client[name] = value
3297
except KeyError:
3298
pass
3299
3300
# Clients who has passed its expire date can still be
3301
# enabled if its last checker was successful. A Client
3302
# whose checker succeeded before we stored its state is
3303
# assumed to have successfully run all checkers during
3304
# downtime.
3305
if client["enabled"]:
3306
if datetime.datetime.utcnow() >= client["expires"]:
3307
if not client["last_checked_ok"]:
3308
logger.warning(
3309
"disabling client {} - Client never "
3310
"performed a successful checker".format(
3311
client_name))
3312
client["enabled"] = False
3313
elif client["last_checker_status"] != 0:
3314
logger.warning(
3315
"disabling client {} - Client last"
3316
" checker failed with error code"
3317
" {}".format(
3318
client_name,
3319
client["last_checker_status"]))
3320
client["enabled"] = False
3321
else:
3322
client["expires"] = (
3323
datetime.datetime.utcnow()
3324
+ client["timeout"])
3325
logger.debug("Last checker succeeded,"
3326
" keeping {} enabled".format(
3327
client_name))
2039
3328
try:
2040
yield (name, special_settings[name]())
2041
except KeyError:
2042
yield (name, value)
2043
2044
tcp_server.clients.update(set(
2045
client_class(name = section,
2046
config= dict(client_config_items(
2047
client_config, section)))
2048
for section in client_config.sections()))
3329
client["secret"] = pgp.decrypt(
3330
client["encrypted_secret"],
3331
client_settings[client_name]["secret"])
3332
except PGPError:
3333
# If decryption fails, we use secret from new settings
3334
logger.debug("Failed to decrypt {} old secret".format(
3335
client_name))
3336
client["secret"] = (client_settings[client_name]
3337
["secret"])
3338
3339
# Add/remove clients based on new changes made to config
3340
for client_name in (set(old_client_settings)
3341
- set(client_settings)):
3342
del clients_data[client_name]
3343
for client_name in (set(client_settings)
3344
- set(old_client_settings)):
3345
clients_data[client_name] = client_settings[client_name]
3346
3347
# Create all client objects
3348
for client_name, client in clients_data.items():
3349
tcp_server.clients[client_name] = client_class(
3350
name=client_name,
3351
settings=client,
3352
server_settings=server_settings)
3353
2049
3354
if not tcp_server.clients:
2050
3355
logger.warning("No clients defined")
2051
2052
if not debug:
2053
try:
2054
with pidfile:
2055
pid = os.getpid()
2056
pidfile.write(str(pid) + "\n".encode("utf-8"))
2057
del pidfile
2058
except IOError:
2059
logger.error("Could not write to file %r with PID %d",
2060
pidfilename, pid)
2061
except NameError:
2062
# "pidfile" was never created
2063
pass
3356
3357
if not foreground:
3358
if pidfile is not None:
3359
pid = os.getpid()
3360
try:
3361
with pidfile:
3362
print(pid, file=pidfile)
3363
except IOError:
3364
logger.error("Could not write to file %r with PID %d",
3365
pidfilename, pid)
3366
del pidfile
2064
3367
del pidfilename
2065
2066
signal.signal(signal.SIGINT, signal.SIG_IGN)
2067
2068
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2069
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2070
3368
3369
for termsig in (signal.SIGHUP, signal.SIGTERM):
3370
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3371
lambda: main_loop.quit() and False)
3372
2071
3373
if use_dbus:
2072
class MandosDBusService(dbus.service.Object):
3374
3375
@alternate_dbus_interfaces(
3376
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3377
class MandosDBusService(DBusObjectWithObjectManager):
2073
3378
"""A D-Bus proxy object"""
3379
2074
3380
def __init__(self):
2075
3381
dbus.service.Object.__init__(self, bus, "/")
3382
2076
3383
_interface = "se.recompile.Mandos"
2077
3384
2078
3385
@dbus.service.signal(_interface, signature="o")
2079
3386
def ClientAdded(self, objpath):
2080
3387
"D-Bus signal"
2081
3388
pass
2082
3389
2083
3390
@dbus.service.signal(_interface, signature="ss")
2084
def ClientNotFound(self, fingerprint, address):
3391
def ClientNotFound(self, key_id, address):
2085
3392
"D-Bus signal"
2086
3393
pass
2087
3394
3395
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3396
"true"})
2088
3397
@dbus.service.signal(_interface, signature="os")
2089
3398
def ClientRemoved(self, objpath, name):
2090
3399
"D-Bus signal"
2091
3400
pass
2092
3401
3402
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3403
"true"})
2093
3404
@dbus.service.method(_interface, out_signature="ao")
2094
3405
def GetAllClients(self):
2095
3406
"D-Bus method"
2096
return dbus.Array(c.dbus_object_path
2097
for c in tcp_server.clients)
2098
3407
return dbus.Array(c.dbus_object_path for c in
3408
tcp_server.clients.values())
3409
3410
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3411
"true"})
2099
3412
@dbus.service.method(_interface,
2100
3413
out_signature="a{oa{sv}}")
2101
3414
def GetAllClientsWithProperties(self):
2102
3415
"D-Bus method"
2103
3416
return dbus.Dictionary(
2104
((c.dbus_object_path, c.GetAll(""))
2105
for c in tcp_server.clients),
3417
{c.dbus_object_path: c.GetAll(
3418
"se.recompile.Mandos.Client")
3419
for c in tcp_server.clients.values()},
2106
3420
signature="oa{sv}")
2107
3421
2108
3422
@dbus.service.method(_interface, in_signature="o")
2109
3423
def RemoveClient(self, object_path):
2110
3424
"D-Bus method"
2111
for c in tcp_server.clients:
3425
for c in tcp_server.clients.values():
2112
3426
if c.dbus_object_path == object_path:
2113
tcp_server.clients.remove(c)
3427
del tcp_server.clients[c.name]
2114
3428
c.remove_from_connection()
2115
# Don't signal anything except ClientRemoved
3429
# Don't signal the disabling
2116
3430
c.disable(quiet=True)
2117
# Emit D-Bus signal
2118
self.ClientRemoved(object_path, c.name)
3431
# Emit D-Bus signal for removal
3432
self.client_removed_signal(c)
2119
3433
return
2120
3434
raise KeyError(object_path)
2121
3435
2122
3436
del _interface
2123
2124
class MandosDBusServiceTransitional(MandosDBusService):
2125
__metaclass__ = AlternateDBusNamesMetaclass
2126
mandos_dbus_service = MandosDBusServiceTransitional()
2127
3437
3438
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3439
out_signature="a{oa{sa{sv}}}")
3440
def GetManagedObjects(self):
3441
"""D-Bus method"""
3442
return dbus.Dictionary(
3443
{client.dbus_object_path:
3444
dbus.Dictionary(
3445
{interface: client.GetAll(interface)
3446
for interface in
3447
client._get_all_interface_names()})
3448
for client in tcp_server.clients.values()})
3449
3450
def client_added_signal(self, client):
3451
"""Send the new standard signal and the old signal"""
3452
if use_dbus:
3453
# New standard signal
3454
self.InterfacesAdded(
3455
client.dbus_object_path,
3456
dbus.Dictionary(
3457
{interface: client.GetAll(interface)
3458
for interface in
3459
client._get_all_interface_names()}))
3460
# Old signal
3461
self.ClientAdded(client.dbus_object_path)
3462
3463
def client_removed_signal(self, client):
3464
"""Send the new standard signal and the old signal"""
3465
if use_dbus:
3466
# New standard signal
3467
self.InterfacesRemoved(
3468
client.dbus_object_path,
3469
client._get_all_interface_names())
3470
# Old signal
3471
self.ClientRemoved(client.dbus_object_path,
3472
client.name)
3473
3474
mandos_dbus_service = MandosDBusService()
3475
3476
# Save modules to variables to exempt the modules from being
3477
# unloaded before the function registered with atexit() is run.
3478
mp = multiprocessing
3479
wn = wnull
3480
2128
3481
def cleanup():
2129
3482
"Cleanup function; run on exit"
2130
service.cleanup()
2131
3483
if zeroconf:
3484
service.cleanup()
3485
3486
mp.active_children()
3487
wn.close()
3488
if not (tcp_server.clients or client_settings):
3489
return
3490
3491
# Store client before exiting. Secrets are encrypted with key
3492
# based on what config file has. If config file is
3493
# removed/edited, old secret will thus be unrecovable.
3494
clients = {}
3495
with PGPEngine() as pgp:
3496
for client in tcp_server.clients.values():
3497
key = client_settings[client.name]["secret"]
3498
client.encrypted_secret = pgp.encrypt(client.secret,
3499
key)
3500
client_dict = {}
3501
3502
# A list of attributes that can not be pickled
3503
# + secret.
3504
exclude = {"bus", "changedstate", "secret",
3505
"checker", "server_settings"}
3506
for name, typ in inspect.getmembers(dbus.service
3507
.Object):
3508
exclude.add(name)
3509
3510
client_dict["encrypted_secret"] = (client
3511
.encrypted_secret)
3512
for attr in client.client_structure:
3513
if attr not in exclude:
3514
client_dict[attr] = getattr(client, attr)
3515
3516
clients[client.name] = client_dict
3517
del client_settings[client.name]["secret"]
3518
3519
try:
3520
with tempfile.NamedTemporaryFile(
3521
mode='wb',
3522
suffix=".pickle",
3523
prefix='clients-',
3524
dir=os.path.dirname(stored_state_path),
3525
delete=False) as stored_state:
3526
pickle.dump((clients, client_settings), stored_state,
3527
protocol=2)
3528
tempname = stored_state.name
3529
os.rename(tempname, stored_state_path)
3530
except (IOError, OSError) as e:
3531
if not debug:
3532
try:
3533
os.remove(tempname)
3534
except NameError:
3535
pass
3536
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3537
logger.warning("Could not save persistent state: {}"
3538
.format(os.strerror(e.errno)))
3539
else:
3540
logger.warning("Could not save persistent state:",
3541
exc_info=e)
3542
raise
3543
3544
# Delete all clients, and settings from config
2132
3545
while tcp_server.clients:
2133
client = tcp_server.clients.pop()
3546
name, client = tcp_server.clients.popitem()
2134
3547
if use_dbus:
2135
3548
client.remove_from_connection()
2136
client.disable_hook = None
2137
# Don't signal anything except ClientRemoved
3549
# Don't signal the disabling
2138
3550
client.disable(quiet=True)
3551
# Emit D-Bus signal for removal
2139
3552
if use_dbus:
2140
# Emit D-Bus signal
2141
mandos_dbus_service.ClientRemoved(client
2142
.dbus_object_path,
2143
client.name)
2144
3553
mandos_dbus_service.client_removed_signal(client)
3554
client_settings.clear()
3555
2145
3556
atexit.register(cleanup)
2146
2147
for client in tcp_server.clients:
3557
3558
for client in tcp_server.clients.values():
2148
3559
if use_dbus:
2149
# Emit D-Bus signal
2150
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2151
client.enable()
2152
3560
# Emit D-Bus signal for adding
3561
mandos_dbus_service.client_added_signal(client)
3562
# Need to initiate checking of clients
3563
if client.enabled:
3564
client.init_checker()
3565
2153
3566
tcp_server.enable()
2154
3567
tcp_server.server_activate()
2155
3568
2156
3569
# Find out what port we got
2157
service.port = tcp_server.socket.getsockname()[1]
3570
if zeroconf:
3571
service.port = tcp_server.socket.getsockname()[1]
2158
3572
if use_ipv6:
2159
3573
logger.info("Now listening on address %r, port %d,"
2160
" flowinfo %d, scope_id %d"
2161
% tcp_server.socket.getsockname())
3574
" flowinfo %d, scope_id %d",
3575
*tcp_server.socket.getsockname())
2162
3576
else: # IPv4
2163
logger.info("Now listening on address %r, port %d"
2164
% tcp_server.socket.getsockname())
2165
2166
#service.interface = tcp_server.socket.getsockname()[3]
2167
3577
logger.info("Now listening on address %r, port %d",
3578
*tcp_server.socket.getsockname())
3579
3580
# service.interface = tcp_server.socket.getsockname()[3]
3581
2168
3582
try:
2169
# From the Avahi example code
2170
try:
2171
service.activate()
2172
except dbus.exceptions.DBusException as error:
2173
logger.critical("DBusException: %s", error)
2174
cleanup()
2175
sys.exit(1)
2176
# End of Avahi example code
2177
2178
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2179
lambda *args, **kwargs:
2180
(tcp_server.handle_request
2181
(*args[2:], **kwargs) or True))
2182
3583
if zeroconf:
3584
# From the Avahi example code
3585
try:
3586
service.activate()
3587
except dbus.exceptions.DBusException as error:
3588
logger.critical("D-Bus Exception", exc_info=error)
3589
cleanup()
3590
sys.exit(1)
3591
# End of Avahi example code
3592
3593
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3594
lambda *args, **kwargs:
3595
(tcp_server.handle_request
3596
(*args[2:], **kwargs) or True))
3597
2183
3598
logger.debug("Starting main loop")
2184
3599
main_loop.run()
2185
3600
except AvahiError as error:
2186
logger.critical("AvahiError: %s", error)
3601
logger.critical("Avahi Error", exc_info=error)
2187
3602
cleanup()
2188
3603
sys.exit(1)
2189
3604
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0