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- Committer: Teddy Hogeborn
- Date: 2019-03-30 07:09:35 UTC
- Revision ID: teddy@recompile.se-20190330070935-mo98cdxyfj8r2ukp
mandos-ctl: Fix grammar.
- files added:
- bugs.xml
- debian/upstream
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
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2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
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# Mandos server - give out binary blobs to connecting clients.
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#
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#
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# This program is partly derived from an example program for an Avahi
7
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# service publisher, downloaded from
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# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
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# methods "add", "remove", "server_state_changed",
10
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# "entry_group_state_changed", "cleanup", and "activate" in the
11
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# "AvahiService" class, and some lines in "main".
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#
12
#
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# Everything else is
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# Copyright © 2008-2011 Teddy Hogeborn
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# 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
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# Copyright © 2008-2019 Björn Påhlsson
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#
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
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#
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
#
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29
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
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# Contact the authors at <mandos@recompile.se>.
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#
33
#
33
34
34
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from __future__ import (division, absolute_import, print_function,
35
36
unicode_literals)
36
37
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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
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48
import argparse
40
49
import datetime
41
50
import errno
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
49
55
import sys
50
56
import re
51
57
import os
60
66
import struct
61
67
import fcntl
62
68
import functools
63
import cPickle as pickle
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
64
73
import multiprocessing
65
74
import types
66
75
import binascii
67
76
import tempfile
77
import itertools
78
import collections
79
import codecs
68
80
69
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import dbus
70
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import dbus.service
71
import gobject
72
import avahi
83
from gi.repository import GLib
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84
from dbus.mainloop.glib import DBusGMainLoop
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import ctypes
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import ctypes.util
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import xml.dom.minidom
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import inspect
78
import GnuPGInterface
79
89
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# Try to find the value of SO_BINDTODEVICE:
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91
try:
92
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
93
# newer, and it is also the most natural place for it:
81
94
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
82
95
except AttributeError:
83
96
try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
84
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from IN import SO_BINDTODEVICE
85
100
except ImportError:
86
SO_BINDTODEVICE = None
87
88
version = "1.4.1"
101
# In Python 2.7 it seems to have been removed entirely.
102
# Try running the C preprocessor:
103
try:
104
cc = subprocess.Popen(["cc", "--language=c", "-E",
105
"/dev/stdin"],
106
stdin=subprocess.PIPE,
107
stdout=subprocess.PIPE)
108
stdout = cc.communicate(
109
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
110
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
111
except (OSError, ValueError, IndexError):
112
# No value found
113
SO_BINDTODEVICE = None
114
115
if sys.version_info.major == 2:
116
str = unicode
117
118
version = "1.8.3"
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stored_state_file = "clients.pickle"
90
120
91
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logger = logging.getLogger()
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syslogger = (logging.handlers.SysLogHandler
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
122
syslogger = None
95
123
96
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try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
125
if_nametoindex = ctypes.cdll.LoadLibrary(
126
ctypes.util.find_library("c")).if_nametoindex
100
127
except (OSError, AttributeError):
128
101
129
def if_nametoindex(interface):
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"Get an interface index the hard way, i.e. using fcntl()"
103
131
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
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with contextlib.closing(socket.socket()) as s:
105
133
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
134
struct.pack(b"16s16x", interface))
135
interface_index = struct.unpack("I", ifreq[16:20])[0]
110
136
return interface_index
111
137
112
138
139
def copy_function(func):
140
"""Make a copy of a function"""
141
if sys.version_info.major == 2:
142
return types.FunctionType(func.func_code,
143
func.func_globals,
144
func.func_name,
145
func.func_defaults,
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func.func_closure)
147
else:
148
return types.FunctionType(func.__code__,
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func.__globals__,
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func.__name__,
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func.__defaults__,
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func.__closure__)
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154
113
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def initlogger(debug, level=logging.WARNING):
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"""init logger and add loglevel"""
115
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global syslogger
159
syslogger = (logging.handlers.SysLogHandler(
160
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
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address="/dev/log"))
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syslogger.setFormatter(logging.Formatter
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('Mandos [%(process)d]: %(levelname)s:'
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164
' %(message)s'))
119
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logger.addHandler(syslogger)
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121
167
if debug:
122
168
console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
135
181
136
182
class PGPEngine(object):
137
183
"""A simple class for OpenPGP symmetric encryption & decryption"""
184
138
185
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
140
186
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
141
self.gnupg = GnuPGInterface.GnuPG()
142
self.gnupg.options.meta_interactive = False
143
self.gnupg.options.homedir = self.tempdir
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self.gnupg.options.extra_args.extend(['--force-mdc',
145
'--quiet',
146
'--no-use-agent'])
147
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
148
206
def __enter__(self):
149
207
return self
150
151
def __exit__ (self, exc_type, exc_value, traceback):
208
209
def __exit__(self, exc_type, exc_value, traceback):
152
210
self._cleanup()
153
211
return False
154
212
155
213
def __del__(self):
156
214
self._cleanup()
157
215
158
216
def _cleanup(self):
159
217
if self.tempdir is not None:
160
218
# Delete contents of tempdir
161
219
for root, dirs, files in os.walk(self.tempdir,
162
topdown = False):
220
topdown=False):
163
221
for filename in files:
164
222
os.remove(os.path.join(root, filename))
165
223
for dirname in dirs:
167
225
# Remove tempdir
168
226
os.rmdir(self.tempdir)
169
227
self.tempdir = None
170
228
171
229
def password_encode(self, password):
172
230
# Passphrase can not be empty and can not contain newlines or
173
231
# NUL bytes. So we prefix it and hex encode it.
174
return b"mandos" + binascii.hexlify(password)
175
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
176
240
def encrypt(self, data, password):
177
self.gnupg.passphrase = self.password_encode(password)
178
with open(os.devnull) as devnull:
179
try:
180
proc = self.gnupg.run(['--symmetric'],
181
create_fhs=['stdin', 'stdout'],
182
attach_fhs={'stderr': devnull})
183
with contextlib.closing(proc.handles['stdin']) as f:
184
f.write(data)
185
with contextlib.closing(proc.handles['stdout']) as f:
186
ciphertext = f.read()
187
proc.wait()
188
except IOError as e:
189
raise PGPError(e)
190
self.gnupg.passphrase = None
241
passphrase = self.password_encode(password)
242
with tempfile.NamedTemporaryFile(
243
dir=self.tempdir) as passfile:
244
passfile.write(passphrase)
245
passfile.flush()
246
proc = subprocess.Popen([self.gpg, '--symmetric',
247
'--passphrase-file',
248
passfile.name]
249
+ self.gnupgargs,
250
stdin=subprocess.PIPE,
251
stdout=subprocess.PIPE,
252
stderr=subprocess.PIPE)
253
ciphertext, err = proc.communicate(input=data)
254
if proc.returncode != 0:
255
raise PGPError(err)
191
256
return ciphertext
192
257
193
258
def decrypt(self, data, password):
194
self.gnupg.passphrase = self.password_encode(password)
195
with open(os.devnull) as devnull:
196
try:
197
proc = self.gnupg.run(['--decrypt'],
198
create_fhs=['stdin', 'stdout'],
199
attach_fhs={'stderr': devnull})
200
with contextlib.closing(proc.handles['stdin'] ) as f:
201
f.write(data)
202
with contextlib.closing(proc.handles['stdout']) as f:
203
decrypted_plaintext = f.read()
204
proc.wait()
205
except IOError as e:
206
raise PGPError(e)
207
self.gnupg.passphrase = None
259
passphrase = self.password_encode(password)
260
with tempfile.NamedTemporaryFile(
261
dir=self.tempdir) as passfile:
262
passfile.write(passphrase)
263
passfile.flush()
264
proc = subprocess.Popen([self.gpg, '--decrypt',
265
'--passphrase-file',
266
passfile.name]
267
+ self.gnupgargs,
268
stdin=subprocess.PIPE,
269
stdout=subprocess.PIPE,
270
stderr=subprocess.PIPE)
271
decrypted_plaintext, err = proc.communicate(input=data)
272
if proc.returncode != 0:
273
raise PGPError(err)
208
274
return decrypted_plaintext
209
275
210
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
211
302
212
303
class AvahiError(Exception):
213
304
def __init__(self, value, *args, **kwargs):
214
305
self.value = value
215
super(AvahiError, self).__init__(value, *args, **kwargs)
216
def __unicode__(self):
217
return unicode(repr(self.value))
306
return super(AvahiError, self).__init__(value, *args,
307
**kwargs)
308
218
309
219
310
class AvahiServiceError(AvahiError):
220
311
pass
221
312
313
222
314
class AvahiGroupError(AvahiError):
223
315
pass
224
316
225
317
226
318
class AvahiService(object):
227
319
"""An Avahi (Zeroconf) service.
228
320
229
321
Attributes:
230
322
interface: integer; avahi.IF_UNSPEC or an interface index.
231
323
Used to optionally bind to the specified interface.
232
324
name: string; Example: 'Mandos'
233
325
type: string; Example: '_mandos._tcp'.
234
See <http://www.dns-sd.org/ServiceTypes.html>
326
See <https://www.iana.org/assignments/service-names-port-numbers>
235
327
port: integer; what port to announce
236
328
TXT: list of strings; TXT record for the service
237
329
domain: string; Domain to publish on, default to .local if empty.
243
335
server: D-Bus Server
244
336
bus: dbus.SystemBus()
245
337
"""
246
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
247
servicetype = None, port = None, TXT = None,
248
domain = "", host = "", max_renames = 32768,
249
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):
250
350
self.interface = interface
251
351
self.name = name
252
352
self.type = servicetype
261
361
self.server = None
262
362
self.bus = bus
263
363
self.entry_group_state_changed_match = None
264
def rename(self):
364
365
def rename(self, remove=True):
265
366
"""Derived from the Avahi example code"""
266
367
if self.rename_count >= self.max_renames:
267
368
logger.critical("No suitable Zeroconf service name found"
268
369
" after %i retries, exiting.",
269
370
self.rename_count)
270
371
raise AvahiServiceError("Too many renames")
271
self.name = unicode(self.server
272
.GetAlternativeServiceName(self.name))
372
self.name = str(
373
self.server.GetAlternativeServiceName(self.name))
374
self.rename_count += 1
273
375
logger.info("Changing Zeroconf service name to %r ...",
274
376
self.name)
275
self.remove()
377
if remove:
378
self.remove()
276
379
try:
277
380
self.add()
278
381
except dbus.exceptions.DBusException as error:
279
logger.critical("DBusException: %s", error)
280
self.cleanup()
281
os._exit(1)
282
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
283
391
def remove(self):
284
392
"""Derived from the Avahi example code"""
285
393
if self.entry_group_state_changed_match is not None:
287
395
self.entry_group_state_changed_match = None
288
396
if self.group is not None:
289
397
self.group.Reset()
398
290
399
def add(self):
291
400
"""Derived from the Avahi example code"""
292
401
self.remove()
309
418
dbus.UInt16(self.port),
310
419
avahi.string_array_to_txt_array(self.TXT))
311
420
self.group.Commit()
421
312
422
def entry_group_state_changed(self, state, error):
313
423
"""Derived from the Avahi example code"""
314
424
logger.debug("Avahi entry group state change: %i", state)
315
425
316
426
if state == avahi.ENTRY_GROUP_ESTABLISHED:
317
427
logger.debug("Zeroconf service established.")
318
428
elif state == avahi.ENTRY_GROUP_COLLISION:
320
430
self.rename()
321
431
elif state == avahi.ENTRY_GROUP_FAILURE:
322
432
logger.critical("Avahi: Error in group state changed %s",
323
unicode(error))
324
raise AvahiGroupError("State changed: %s"
325
% unicode(error))
433
str(error))
434
raise AvahiGroupError("State changed: {!s}".format(error))
435
326
436
def cleanup(self):
327
437
"""Derived from the Avahi example code"""
328
438
if self.group is not None:
333
443
pass
334
444
self.group = None
335
445
self.remove()
446
336
447
def server_state_changed(self, state, error=None):
337
448
"""Derived from the Avahi example code"""
338
449
logger.debug("Avahi server state change: %i", state)
339
bad_states = { avahi.SERVER_INVALID:
340
"Zeroconf server invalid",
341
avahi.SERVER_REGISTERING: None,
342
avahi.SERVER_COLLISION:
343
"Zeroconf server name collision",
344
avahi.SERVER_FAILURE:
345
"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
}
346
456
if state in bad_states:
347
457
if bad_states[state] is not None:
348
458
if error is None:
351
461
logger.error(bad_states[state] + ": %r", error)
352
462
self.cleanup()
353
463
elif state == avahi.SERVER_RUNNING:
354
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)
355
476
else:
356
477
if error is None:
357
478
logger.debug("Unknown state: %r", state)
358
479
else:
359
480
logger.debug("Unknown state: %r: %r", state, error)
481
360
482
def activate(self):
361
483
"""Derived from the Avahi example code"""
362
484
if self.server is None:
366
488
follow_name_owner_changes=True),
367
489
avahi.DBUS_INTERFACE_SERVER)
368
490
self.server.connect_to_signal("StateChanged",
369
self.server_state_changed)
491
self.server_state_changed)
370
492
self.server_state_changed(self.server.GetState())
371
493
494
372
495
class AvahiServiceToSyslog(AvahiService):
373
def rename(self):
496
def rename(self, *args, **kwargs):
374
497
"""Add the new name to the syslog messages"""
375
ret = AvahiService.rename(self)
376
syslogger.setFormatter(logging.Formatter
377
('Mandos (%s) [%%(process)d]:'
378
' %%(levelname)s: %%(message)s'
379
% self.name))
498
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
499
syslogger.setFormatter(logging.Formatter(
500
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
501
.format(self.name)))
380
502
return ret
381
503
382
def timedelta_to_milliseconds(td):
383
"Convert a datetime.timedelta() to milliseconds"
384
return ((td.days * 24 * 60 * 60 * 1000)
385
+ (td.seconds * 1000)
386
+ (td.microseconds // 1000))
387
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
388
817
class Client(object):
389
818
"""A representation of a client host served by this server.
390
819
391
820
Attributes:
392
821
approved: bool(); 'None' if not yet approved/disapproved
393
822
approval_delay: datetime.timedelta(); Time to wait for approval
395
824
checker: subprocess.Popen(); a running checker process used
396
825
to see if the client lives.
397
826
'None' if no process is running.
398
checker_callback_tag: a gobject event source tag, or None
827
checker_callback_tag: a GLib event source tag, or None
399
828
checker_command: string; External command which is run to check
400
829
if client lives. %() expansions are done at
401
830
runtime with vars(self) as dict, so that for
402
831
instance %(name)s can be used in the command.
403
checker_initiator_tag: a gobject event source tag, or None
832
checker_initiator_tag: a GLib event source tag, or None
404
833
created: datetime.datetime(); (UTC) object creation
405
834
client_structure: Object describing what attributes a client has
406
835
and is used for storing the client at exit
407
836
current_checker_command: string; current running checker_command
408
disable_initiator_tag: a gobject event source tag, or None
837
disable_initiator_tag: a GLib event source tag, or None
409
838
enabled: bool()
410
839
fingerprint: string (40 or 32 hexadecimal digits); used to
411
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
412
843
host: string; available for use by the checker command
413
844
interval: datetime.timedelta(); How often to start a new checker
414
845
last_approval_request: datetime.datetime(); (UTC) or None
415
846
last_checked_ok: datetime.datetime(); (UTC) or None
416
847
last_checker_status: integer between 0 and 255 reflecting exit
417
848
status of last checker. -1 reflects crashed
418
checker, or None.
849
checker, -2 means no checker completed yet.
850
last_checker_signal: The signal which killed the last checker, if
851
last_checker_status is -1
419
852
last_enabled: datetime.datetime(); (UTC) or None
420
853
name: string; from the config file, used in log messages and
421
854
D-Bus identifiers
422
855
secret: bytestring; sent verbatim (over TLS) to client
423
856
timeout: datetime.timedelta(); How long from last_checked_ok
424
857
until this client is disabled
425
extended_timeout: extra long timeout when password has been sent
858
extended_timeout: extra long timeout when secret has been sent
426
859
runtime_expansions: Allowed attributes for runtime expansion.
427
860
expires: datetime.datetime(); time (UTC) when a client will be
428
861
disabled, or None
862
server_settings: The server_settings dict from main()
429
863
"""
430
864
431
865
runtime_expansions = ("approval_delay", "approval_duration",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
866
"created", "enabled", "expires", "key_id",
867
"fingerprint", "host", "interval",
868
"last_approval_request", "last_checked_ok",
434
869
"last_enabled", "name", "timeout")
435
client_defaults = { "timeout": "5m",
436
"extended_timeout": "15m",
437
"interval": "2m",
438
"checker": "fping -q -- %%(host)s",
439
"host": "",
440
"approval_delay": "0s",
441
"approval_duration": "1s",
442
"approved_by_default": "True",
443
"enabled": "True",
444
}
445
446
def timeout_milliseconds(self):
447
"Return the 'timeout' attribute in milliseconds"
448
return timedelta_to_milliseconds(self.timeout)
449
450
def extended_timeout_milliseconds(self):
451
"Return the 'extended_timeout' attribute in milliseconds"
452
return timedelta_to_milliseconds(self.extended_timeout)
453
454
def interval_milliseconds(self):
455
"Return the 'interval' attribute in milliseconds"
456
return timedelta_to_milliseconds(self.interval)
457
458
def approval_delay_milliseconds(self):
459
return timedelta_to_milliseconds(self.approval_delay)
870
client_defaults = {
871
"timeout": "PT5M",
872
"extended_timeout": "PT15M",
873
"interval": "PT2M",
874
"checker": "fping -q -- %%(host)s",
875
"host": "",
876
"approval_delay": "PT0S",
877
"approval_duration": "PT1S",
878
"approved_by_default": "True",
879
"enabled": "True",
880
}
460
881
461
882
@staticmethod
462
883
def config_parser(config):
470
891
for client_name in config.sections():
471
892
section = dict(config.items(client_name))
472
893
client = settings[client_name] = {}
473
894
474
895
client["host"] = section["host"]
475
896
# Reformat values from string types to Python types
476
897
client["approved_by_default"] = config.getboolean(
477
898
client_name, "approved_by_default")
478
client["enabled"] = config.getboolean(client_name, "enabled")
479
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(" ", ""))
480
907
client["fingerprint"] = (section["fingerprint"].upper()
481
908
.replace(" ", ""))
482
909
if "secret" in section:
483
client["secret"] = section["secret"].decode("base64")
910
client["secret"] = codecs.decode(section["secret"]
911
.encode("utf-8"),
912
"base64")
484
913
elif "secfile" in section:
485
914
with open(os.path.expanduser(os.path.expandvars
486
915
(section["secfile"])),
487
916
"rb") as secfile:
488
917
client["secret"] = secfile.read()
489
918
else:
490
raise TypeError("No secret or secfile for section %s"
491
% section)
919
raise TypeError("No secret or secfile for section {}"
920
.format(section))
492
921
client["timeout"] = string_to_delta(section["timeout"])
493
922
client["extended_timeout"] = string_to_delta(
494
923
section["extended_timeout"])
500
929
client["checker_command"] = section["checker"]
501
930
client["last_approval_request"] = None
502
931
client["last_checked_ok"] = None
503
client["last_checker_status"] = None
504
932
client["last_checker_status"] = -2
933
505
934
return settings
506
507
508
def __init__(self, settings, name = None):
509
"""Note: the 'checker' key in 'config' sets the
510
'checker_command' attribute and *not* the 'checker'
511
attribute."""
935
936
def __init__(self, settings, name=None, server_settings=None):
512
937
self.name = name
938
if server_settings is None:
939
server_settings = {}
940
self.server_settings = server_settings
513
941
# adding all client settings
514
for setting, value in settings.iteritems():
942
for setting, value in settings.items():
515
943
setattr(self, setting, value)
516
944
517
945
if self.enabled:
518
946
if not hasattr(self, "last_enabled"):
519
947
self.last_enabled = datetime.datetime.utcnow()
523
951
else:
524
952
self.last_enabled = None
525
953
self.expires = None
526
954
527
955
logger.debug("Creating client %r", self.name)
528
# Uppercase and remove spaces from fingerprint for later
529
# comparison purposes with return value from the fingerprint()
530
# function
956
logger.debug(" Key ID: %s", self.key_id)
531
957
logger.debug(" Fingerprint: %s", self.fingerprint)
532
self.created = settings.get("created", datetime.datetime.utcnow())
958
self.created = settings.get("created",
959
datetime.datetime.utcnow())
533
960
534
961
# attributes specific for this server instance
535
962
self.checker = None
539
966
self.current_checker_command = None
540
967
self.approved = None
541
968
self.approvals_pending = 0
542
self.changedstate = (multiprocessing_manager
543
.Condition(multiprocessing_manager
544
.Lock()))
545
self.client_structure = [attr for attr in
546
self.__dict__.iterkeys()
969
self.changedstate = multiprocessing_manager.Condition(
970
multiprocessing_manager.Lock())
971
self.client_structure = [attr
972
for attr in self.__dict__.keys()
547
973
if not attr.startswith("_")]
548
974
self.client_structure.append("client_structure")
549
550
for name, t in inspect.getmembers(type(self),
551
lambda obj:
552
isinstance(obj,
553
property)):
975
976
for name, t in inspect.getmembers(
977
type(self), lambda obj: isinstance(obj, property)):
554
978
if not name.startswith("_"):
555
979
self.client_structure.append(name)
556
980
557
981
# Send notice to process children that client state has changed
558
982
def send_changedstate(self):
559
983
with self.changedstate:
560
984
self.changedstate.notify_all()
561
985
562
986
def enable(self):
563
987
"""Start this client's checker and timeout hooks"""
564
988
if getattr(self, "enabled", False):
565
989
# Already enabled
566
990
return
567
self.send_changedstate()
568
991
self.expires = datetime.datetime.utcnow() + self.timeout
569
992
self.enabled = True
570
993
self.last_enabled = datetime.datetime.utcnow()
571
994
self.init_checker()
572
995
self.send_changedstate()
996
573
997
def disable(self, quiet=True):
574
998
"""Disable this client."""
575
999
if not getattr(self, "enabled", False):
576
1000
return False
577
1001
if not quiet:
578
self.send_changedstate()
579
if not quiet:
580
1002
logger.info("Disabling client %s", self.name)
581
if getattr(self, "disable_initiator_tag", False):
582
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)
583
1005
self.disable_initiator_tag = None
584
1006
self.expires = None
585
if getattr(self, "checker_initiator_tag", False):
586
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)
587
1009
self.checker_initiator_tag = None
588
1010
self.stop_checker()
589
1011
self.enabled = False
590
# 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
591
1015
return False
592
1016
593
1017
def __del__(self):
594
1018
self.disable()
595
1019
596
1020
def init_checker(self):
597
1021
# Schedule a new checker to be started an 'interval' from now,
598
1022
# and every interval from then on.
599
self.checker_initiator_tag = (gobject.timeout_add
600
(self.interval_milliseconds(),
601
self.start_checker))
1023
if self.checker_initiator_tag is not None:
1024
GLib.source_remove(self.checker_initiator_tag)
1025
self.checker_initiator_tag = GLib.timeout_add(
1026
int(self.interval.total_seconds() * 1000),
1027
self.start_checker)
602
1028
# Schedule a disable() when 'timeout' has passed
603
self.disable_initiator_tag = (gobject.timeout_add
604
(self.timeout_milliseconds(),
605
self.disable))
1029
if self.disable_initiator_tag is not None:
1030
GLib.source_remove(self.disable_initiator_tag)
1031
self.disable_initiator_tag = GLib.timeout_add(
1032
int(self.timeout.total_seconds() * 1000), self.disable)
606
1033
# Also start a new checker *right now*.
607
1034
self.start_checker()
608
609
def checker_callback(self, pid, condition, command):
1035
1036
def checker_callback(self, source, condition, connection,
1037
command):
610
1038
"""The checker has completed, so take appropriate actions."""
611
1039
self.checker_callback_tag = None
612
1040
self.checker = None
613
if os.WIFEXITED(condition):
614
self.last_checker_status = os.WEXITSTATUS(condition)
1041
# Read return code from connection (see call_pipe)
1042
returncode = connection.recv()
1043
connection.close()
1044
1045
if returncode >= 0:
1046
self.last_checker_status = returncode
1047
self.last_checker_signal = None
615
1048
if self.last_checker_status == 0:
616
1049
logger.info("Checker for %(name)s succeeded",
617
1050
vars(self))
618
1051
self.checked_ok()
619
1052
else:
620
logger.info("Checker for %(name)s failed",
621
vars(self))
1053
logger.info("Checker for %(name)s failed", vars(self))
622
1054
else:
623
1055
self.last_checker_status = -1
1056
self.last_checker_signal = -returncode
624
1057
logger.warning("Checker for %(name)s crashed?",
625
1058
vars(self))
626
627
def checked_ok(self, timeout=None):
628
"""Bump up the timeout for this client.
629
630
This should only be called when the client has been seen,
631
alive and well.
632
"""
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."""
633
1070
if timeout is None:
634
1071
timeout = self.timeout
635
self.last_checked_ok = datetime.datetime.utcnow()
636
1072
if self.disable_initiator_tag is not None:
637
gobject.source_remove(self.disable_initiator_tag)
1073
GLib.source_remove(self.disable_initiator_tag)
1074
self.disable_initiator_tag = None
638
1075
if getattr(self, "enabled", False):
639
self.disable_initiator_tag = (gobject.timeout_add
640
(timedelta_to_milliseconds
641
(timeout), self.disable))
1076
self.disable_initiator_tag = GLib.timeout_add(
1077
int(timeout.total_seconds() * 1000), self.disable)
642
1078
self.expires = datetime.datetime.utcnow() + timeout
643
1079
644
1080
def need_approval(self):
645
1081
self.last_approval_request = datetime.datetime.utcnow()
646
1082
647
1083
def start_checker(self):
648
1084
"""Start a new checker subprocess if one is not running.
649
1085
650
1086
If a checker already exists, leave it running and do
651
1087
nothing."""
652
1088
# The reason for not killing a running checker is that if we
653
# did that, then if a checker (for some reason) started
654
# running slowly and taking more than 'interval' time, the
655
# client would inevitably timeout, since no checker would get
656
# 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
657
1093
# checkers alone, the checker would have to take more time
658
1094
# than 'timeout' for the client to be disabled, which is as it
659
1095
# should be.
660
661
# If a checker exists, make sure it is not a zombie
662
try:
663
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
664
except (AttributeError, OSError) as error:
665
if (isinstance(error, OSError)
666
and error.errno != errno.ECHILD):
667
raise error
668
else:
669
if pid:
670
logger.warning("Checker was a zombie")
671
gobject.source_remove(self.checker_callback_tag)
672
self.checker_callback(pid, status,
673
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
674
1101
# Start a new checker if needed
675
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}
676
1107
try:
677
# In case checker_command has exactly one % operator
678
command = self.checker_command % self.host
679
except TypeError:
680
# Escape attributes for the shell
681
escaped_attrs = dict(
682
(attr,
683
re.escape(unicode(str(getattr(self, attr, "")),
684
errors=
685
'replace')))
686
for attr in
687
self.runtime_expansions)
688
689
try:
690
command = self.checker_command % escaped_attrs
691
except TypeError as error:
692
logger.error('Could not format string "%s":'
693
' %s', self.checker_command, error)
694
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
695
1114
self.current_checker_command = command
696
try:
697
logger.info("Starting checker %r for %s",
698
command, self.name)
699
# We don't need to redirect stdout and stderr, since
700
# in normal mode, that is already done by daemon(),
701
# and in debug mode we don't want to. (Stdin is
702
# always replaced by /dev/null.)
703
self.checker = subprocess.Popen(command,
704
close_fds=True,
705
shell=True, cwd="/")
706
self.checker_callback_tag = (gobject.child_watch_add
707
(self.checker.pid,
708
self.checker_callback,
709
data=command))
710
# The checker may have completed before the gobject
711
# watch was added. Check for this.
712
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
713
if pid:
714
gobject.source_remove(self.checker_callback_tag)
715
self.checker_callback(pid, status, command)
716
except OSError as error:
717
logger.error("Failed to start subprocess: %s",
718
error)
719
# 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
720
1141
return True
721
1142
722
1143
def stop_checker(self):
723
1144
"""Force the checker process, if any, to stop."""
724
1145
if self.checker_callback_tag:
725
gobject.source_remove(self.checker_callback_tag)
1146
GLib.source_remove(self.checker_callback_tag)
726
1147
self.checker_callback_tag = None
727
1148
if getattr(self, "checker", None) is None:
728
1149
return
729
1150
logger.debug("Stopping checker for %(name)s", vars(self))
730
try:
731
os.kill(self.checker.pid, signal.SIGTERM)
732
#time.sleep(0.5)
733
#if self.checker.poll() is None:
734
# os.kill(self.checker.pid, signal.SIGKILL)
735
except OSError as error:
736
if error.errno != errno.ESRCH: # No such process
737
raise
1151
self.checker.terminate()
738
1152
self.checker = None
739
1153
740
1154
741
def dbus_service_property(dbus_interface, signature="v",
742
access="readwrite", byte_arrays=False):
1155
def dbus_service_property(dbus_interface,
1156
signature="v",
1157
access="readwrite",
1158
byte_arrays=False):
743
1159
"""Decorators for marking methods of a DBusObjectWithProperties to
744
1160
become properties on the D-Bus.
745
1161
746
1162
The decorated method will be called with no arguments by "Get"
747
1163
and with one argument by "Set".
748
1164
749
1165
The parameters, where they are supported, are the same as
750
1166
dbus.service.method, except there is only "signature", since the
751
1167
type from Get() and the type sent to Set() is the same.
754
1170
# "Set" method, so we fail early here:
755
1171
if byte_arrays and signature != "ay":
756
1172
raise ValueError("Byte arrays not supported for non-'ay'"
757
" signature %r" % signature)
1173
" signature {!r}".format(signature))
1174
758
1175
def decorator(func):
759
1176
func._dbus_is_property = True
760
1177
func._dbus_interface = dbus_interface
763
1180
func._dbus_name = func.__name__
764
1181
if func._dbus_name.endswith("_dbus_property"):
765
1182
func._dbus_name = func._dbus_name[:-14]
766
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
767
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
768
1229
return decorator
769
1230
770
1231
771
1232
class DBusPropertyException(dbus.exceptions.DBusException):
772
1233
"""A base class for D-Bus property-related exceptions
773
1234
"""
774
def __unicode__(self):
775
return unicode(str(self))
1235
pass
776
1236
777
1237
778
1238
class DBusPropertyAccessException(DBusPropertyException):
787
1247
pass
788
1248
789
1249
790
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):
791
1340
"""A D-Bus object with properties.
792
1341
793
1342
Classes inheriting from this can use the dbus_service_property
794
1343
decorator to expose methods as D-Bus properties. It exposes the
795
1344
standard Get(), Set(), and GetAll() methods on the D-Bus.
796
1345
"""
797
798
@staticmethod
799
def _is_dbus_property(obj):
800
return getattr(obj, "_dbus_is_property", False)
801
802
def _get_all_dbus_properties(self):
803
"""Returns a generator of (name, attribute) pairs
804
"""
805
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
806
for cls in self.__class__.__mro__
807
for name, prop in
808
inspect.getmembers(cls, self._is_dbus_property))
809
1346
810
1347
def _get_dbus_property(self, interface_name, property_name):
811
1348
"""Returns a bound method if one exists which is a D-Bus
812
1349
property with the specified name and interface.
813
1350
"""
814
for cls in self.__class__.__mro__:
815
for name, value in (inspect.getmembers
816
(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")):
817
1354
if (value._dbus_name == property_name
818
1355
and value._dbus_interface == interface_name):
819
1356
return value.__get__(self)
820
1357
821
1358
# No such property
822
raise DBusPropertyNotFound(self.dbus_object_path + ":"
823
+ interface_name + "."
824
+ property_name)
825
826
@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",
827
1373
out_signature="v")
828
1374
def Get(self, interface_name, property_name):
829
1375
"""Standard D-Bus property Get() method, see D-Bus standard.
835
1381
if not hasattr(value, "variant_level"):
836
1382
return value
837
1383
return type(value)(value, variant_level=value.variant_level+1)
838
1384
839
1385
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
840
1386
def Set(self, interface_name, property_name, value):
841
1387
"""Standard D-Bus property Set() method, see D-Bus standard.
847
1393
# The byte_arrays option is not supported yet on
848
1394
# signatures other than "ay".
849
1395
if prop._dbus_signature != "ay":
850
raise ValueError
851
value = dbus.ByteArray(''.join(unichr(byte)
852
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))
853
1401
prop(value)
854
855
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1402
1403
@dbus.service.method(dbus.PROPERTIES_IFACE,
1404
in_signature="s",
856
1405
out_signature="a{sv}")
857
1406
def GetAll(self, interface_name):
858
1407
"""Standard D-Bus property GetAll() method, see D-Bus
859
1408
standard.
860
1409
861
1410
Note: Will not include properties with access="write".
862
1411
"""
863
1412
properties = {}
864
for name, prop in self._get_all_dbus_properties():
1413
for name, prop in self._get_all_dbus_things("property"):
865
1414
if (interface_name
866
1415
and interface_name != prop._dbus_interface):
867
1416
# Interface non-empty but did not match
873
1422
if not hasattr(value, "variant_level"):
874
1423
properties[name] = value
875
1424
continue
876
properties[name] = type(value)(value, variant_level=
877
value.variant_level+1)
1425
properties[name] = type(value)(
1426
value, variant_level=value.variant_level + 1)
878
1427
return dbus.Dictionary(properties, signature="sv")
879
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
880
1437
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
881
1438
out_signature="s",
882
1439
path_keyword='object_path',
883
1440
connection_keyword='connection')
884
1441
def Introspect(self, object_path, connection):
885
"""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.
886
1445
"""
887
xmlstring = dbus.service.Object.Introspect(self, object_path,
888
connection)
1446
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1447
object_path,
1448
connection)
889
1449
try:
890
1450
document = xml.dom.minidom.parseString(xmlstring)
1451
891
1452
def make_tag(document, name, prop):
892
1453
e = document.createElement("property")
893
1454
e.setAttribute("name", name)
894
1455
e.setAttribute("type", prop._dbus_signature)
895
1456
e.setAttribute("access", prop._dbus_access)
896
1457
return e
1458
897
1459
for if_tag in document.getElementsByTagName("interface"):
1460
# Add property tags
898
1461
for tag in (make_tag(document, name, prop)
899
1462
for name, prop
900
in self._get_all_dbus_properties()
1463
in self._get_all_dbus_things("property")
901
1464
if prop._dbus_interface
902
1465
== if_tag.getAttribute("name")):
903
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)
904
1483
# Add the names to the return values for the
905
1484
# "org.freedesktop.DBus.Properties" methods
906
1485
if (if_tag.getAttribute("name")
921
1500
except (AttributeError, xml.dom.DOMException,
922
1501
xml.parsers.expat.ExpatError) as error:
923
1502
logger.error("Failed to override Introspection method",
924
error)
925
return xmlstring
926
927
928
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):
929
1579
"""Convert a UTC datetime.datetime() to a D-Bus type."""
930
1580
if dt is None:
931
return dbus.String("", variant_level = variant_level)
932
return dbus.String(dt.isoformat(),
933
variant_level=variant_level)
934
935
936
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
937
.__metaclass__):
938
"""Applied to an empty subclass of a D-Bus object, this metaclass
939
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).
940
1607
"""
941
def __new__(mcs, name, bases, attr):
942
# Go through all the base classes which could have D-Bus
943
# methods, signals, or properties in them
944
for base in (b for b in bases
945
if issubclass(b, dbus.service.Object)):
946
# Go though all attributes of the base class
947
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):
948
1616
# Ignore non-D-Bus attributes, and D-Bus attributes
949
1617
# with the wrong interface name
950
1618
if (not hasattr(attribute, "_dbus_interface")
951
or not attribute._dbus_interface
952
.startswith("se.recompile.Mandos")):
1619
or not attribute._dbus_interface.startswith(
1620
orig_interface_name)):
953
1621
continue
954
1622
# Create an alternate D-Bus interface name based on
955
1623
# the current name
956
alt_interface = (attribute._dbus_interface
957
.replace("se.recompile.Mandos",
958
"se.bsnet.fukt.Mandos"))
1624
alt_interface = attribute._dbus_interface.replace(
1625
orig_interface_name, alt_interface_name)
1626
interface_names.add(alt_interface)
959
1627
# Is this a D-Bus signal?
960
1628
if getattr(attribute, "_dbus_is_signal", False):
961
# Extract the original non-method function by
962
# black magic
963
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(
964
1633
zip(attribute.func_code.co_freevars,
965
attribute.__closure__))["func"]
966
.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)
967
1641
# Create a new, but exactly alike, function
968
1642
# object, and decorate it to be a new D-Bus signal
969
1643
# with the alternate D-Bus interface name
970
new_function = (dbus.service.signal
971
(alt_interface,
972
attribute._dbus_signature)
973
(types.FunctionType(
974
nonmethod_func.func_code,
975
nonmethod_func.func_globals,
976
nonmethod_func.func_name,
977
nonmethod_func.func_defaults,
978
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
979
1655
# Define a creator of a function to call both the
980
# old and new functions, so both the old and new
981
# 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
982
1659
def fixscope(func1, func2):
983
1660
"""This function is a scope container to pass
984
1661
func1 and func2 to the "call_both" function
985
1662
outside of its arguments"""
1663
1664
@functools.wraps(func2)
986
1665
def call_both(*args, **kwargs):
987
1666
"""This function will emit two D-Bus
988
1667
signals by calling func1 and func2"""
989
1668
func1(*args, **kwargs)
990
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
991
1676
return call_both
992
1677
# Create the "call_both" function and add it to
993
1678
# the class
994
attr[attrname] = fixscope(attribute,
995
new_function)
1679
attr[attrname] = fixscope(attribute, new_function)
996
1680
# Is this a D-Bus method?
997
1681
elif getattr(attribute, "_dbus_is_method", False):
998
1682
# Create a new, but exactly alike, function
999
1683
# object. Decorate it to be a new D-Bus method
1000
1684
# with the alternate D-Bus interface name. Add it
1001
1685
# to the class.
1002
attr[attrname] = (dbus.service.method
1003
(alt_interface,
1004
attribute._dbus_in_signature,
1005
attribute._dbus_out_signature)
1006
(types.FunctionType
1007
(attribute.func_code,
1008
attribute.func_globals,
1009
attribute.func_name,
1010
attribute.func_defaults,
1011
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
1012
1698
# Is this a D-Bus property?
1013
1699
elif getattr(attribute, "_dbus_is_property", False):
1014
1700
# Create a new, but exactly alike, function
1015
1701
# object, and decorate it to be a new D-Bus
1016
1702
# property with the alternate D-Bus interface
1017
1703
# name. Add it to the class.
1018
attr[attrname] = (dbus_service_property
1019
(alt_interface,
1020
attribute._dbus_signature,
1021
attribute._dbus_access,
1022
attribute
1023
._dbus_get_args_options
1024
["byte_arrays"])
1025
(types.FunctionType
1026
(attribute.func_code,
1027
attribute.func_globals,
1028
attribute.func_name,
1029
attribute.func_defaults,
1030
attribute.func_closure)))
1031
return type.__new__(mcs, name, bases, attr)
1032
1033
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"})
1034
1756
class ClientDBus(Client, DBusObjectWithProperties):
1035
1757
"""A Client class using D-Bus
1036
1758
1037
1759
Attributes:
1038
1760
dbus_object_path: dbus.ObjectPath
1039
1761
bus: dbus.SystemBus()
1040
1762
"""
1041
1763
1042
1764
runtime_expansions = (Client.runtime_expansions
1043
+ ("dbus_object_path",))
1044
1765
+ ("dbus_object_path", ))
1766
1767
_interface = "se.recompile.Mandos.Client"
1768
1045
1769
# dbus.service.Object doesn't use super(), so we can't either.
1046
1047
def __init__(self, bus = None, *args, **kwargs):
1770
1771
def __init__(self, bus=None, *args, **kwargs):
1048
1772
self.bus = bus
1049
1773
Client.__init__(self, *args, **kwargs)
1050
self._approvals_pending = 0
1051
1052
self._approvals_pending = 0
1053
1774
# Only now, when this client is initialized, can it show up on
1054
1775
# the D-Bus
1055
client_object_name = unicode(self.name).translate(
1776
client_object_name = str(self.name).translate(
1056
1777
{ord("."): ord("_"),
1057
1778
ord("-"): ord("_")})
1058
self.dbus_object_path = (dbus.ObjectPath
1059
("/clients/" + client_object_name))
1779
self.dbus_object_path = dbus.ObjectPath(
1780
"/clients/" + client_object_name)
1060
1781
DBusObjectWithProperties.__init__(self, self.bus,
1061
1782
self.dbus_object_path)
1062
1063
def notifychangeproperty(transform_func,
1064
dbus_name, type_func=lambda x: x,
1065
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):
1066
1789
""" Modify a variable so that it's a property which announces
1067
1790
its changes to DBus.
1068
1791
1069
1792
transform_fun: Function that takes a value and a variant_level
1070
1793
and transforms it to a D-Bus type.
1071
1794
dbus_name: D-Bus name of the variable
1073
1796
to the D-Bus. Default: no transform
1074
1797
variant_level: D-Bus variant level. Default: 1
1075
1798
"""
1076
attrname = "_{0}".format(dbus_name)
1799
attrname = "_{}".format(dbus_name)
1800
1077
1801
def setter(self, value):
1078
1802
if hasattr(self, "dbus_object_path"):
1079
1803
if (not hasattr(self, attrname) or
1080
1804
type_func(getattr(self, attrname, None))
1081
1805
!= type_func(value)):
1082
dbus_value = transform_func(type_func(value),
1083
variant_level
1084
=variant_level)
1085
self.PropertyChanged(dbus.String(dbus_name),
1086
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())
1087
1821
setattr(self, attrname, value)
1088
1822
1089
1823
return property(lambda self: getattr(self, attrname), setter)
1090
1091
1824
1092
1825
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1093
1826
approvals_pending = notifychangeproperty(dbus.Boolean,
1094
1827
"ApprovalPending",
1095
type_func = bool)
1828
type_func=bool)
1096
1829
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1097
1830
last_enabled = notifychangeproperty(datetime_to_dbus,
1098
1831
"LastEnabled")
1099
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1100
type_func = lambda checker:
1101
checker is not None)
1832
checker = notifychangeproperty(
1833
dbus.Boolean, "CheckerRunning",
1834
type_func=lambda checker: checker is not None)
1102
1835
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1103
1836
"LastCheckedOK")
1837
last_checker_status = notifychangeproperty(dbus.Int16,
1838
"LastCheckerStatus")
1104
1839
last_approval_request = notifychangeproperty(
1105
1840
datetime_to_dbus, "LastApprovalRequest")
1106
1841
approved_by_default = notifychangeproperty(dbus.Boolean,
1107
1842
"ApprovedByDefault")
1108
approval_delay = notifychangeproperty(dbus.UInt64,
1109
"ApprovalDelay",
1110
type_func =
1111
timedelta_to_milliseconds)
1843
approval_delay = notifychangeproperty(
1844
dbus.UInt64, "ApprovalDelay",
1845
type_func=lambda td: td.total_seconds() * 1000)
1112
1846
approval_duration = notifychangeproperty(
1113
1847
dbus.UInt64, "ApprovalDuration",
1114
type_func = timedelta_to_milliseconds)
1848
type_func=lambda td: td.total_seconds() * 1000)
1115
1849
host = notifychangeproperty(dbus.String, "Host")
1116
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1117
type_func =
1118
timedelta_to_milliseconds)
1850
timeout = notifychangeproperty(
1851
dbus.UInt64, "Timeout",
1852
type_func=lambda td: td.total_seconds() * 1000)
1119
1853
extended_timeout = notifychangeproperty(
1120
1854
dbus.UInt64, "ExtendedTimeout",
1121
type_func = timedelta_to_milliseconds)
1122
interval = notifychangeproperty(dbus.UInt64,
1123
"Interval",
1124
type_func =
1125
timedelta_to_milliseconds)
1855
type_func=lambda td: td.total_seconds() * 1000)
1856
interval = notifychangeproperty(
1857
dbus.UInt64, "Interval",
1858
type_func=lambda td: td.total_seconds() * 1000)
1126
1859
checker_command = notifychangeproperty(dbus.String, "Checker")
1127
1860
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1861
invalidate_only=True)
1862
1128
1863
del notifychangeproperty
1129
1864
1130
1865
def __del__(self, *args, **kwargs):
1131
1866
try:
1132
1867
self.remove_from_connection()
1135
1870
if hasattr(DBusObjectWithProperties, "__del__"):
1136
1871
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1137
1872
Client.__del__(self, *args, **kwargs)
1138
1139
def checker_callback(self, pid, condition, command,
1140
*args, **kwargs):
1141
self.checker_callback_tag = None
1142
self.checker = None
1143
if os.WIFEXITED(condition):
1144
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:
1145
1881
# Emit D-Bus signal
1146
1882
self.CheckerCompleted(dbus.Int16(exitstatus),
1147
dbus.Int64(condition),
1883
# This is specific to GNU libC
1884
dbus.Int64(exitstatus << 8),
1148
1885
dbus.String(command))
1149
1886
else:
1150
1887
# Emit D-Bus signal
1151
1888
self.CheckerCompleted(dbus.Int16(-1),
1152
dbus.Int64(condition),
1889
dbus.Int64(
1890
# This is specific to GNU libC
1891
(exitstatus << 8)
1892
| self.last_checker_signal),
1153
1893
dbus.String(command))
1154
1155
return Client.checker_callback(self, pid, condition, command,
1156
*args, **kwargs)
1157
1894
return ret
1895
1158
1896
def start_checker(self, *args, **kwargs):
1159
old_checker = self.checker
1160
if self.checker is not None:
1161
old_checker_pid = self.checker.pid
1162
else:
1163
old_checker_pid = None
1897
old_checker_pid = getattr(self.checker, "pid", None)
1164
1898
r = Client.start_checker(self, *args, **kwargs)
1165
1899
# Only if new checker process was started
1166
1900
if (self.checker is not None
1168
1902
# Emit D-Bus signal
1169
1903
self.CheckerStarted(self.current_checker_command)
1170
1904
return r
1171
1905
1172
1906
def _reset_approved(self):
1173
1907
self.approved = None
1174
1908
return False
1175
1909
1176
1910
def approve(self, value=True):
1177
self.send_changedstate()
1178
1911
self.approved = value
1179
gobject.timeout_add(timedelta_to_milliseconds
1180
(self.approval_duration),
1181
self._reset_approved)
1182
1183
1184
## D-Bus methods, signals & properties
1185
_interface = "se.recompile.Mandos.Client"
1186
1187
## Signals
1188
1912
GLib.timeout_add(int(self.approval_duration.total_seconds()
1913
* 1000), self._reset_approved)
1914
self.send_changedstate()
1915
1916
# D-Bus methods, signals & properties
1917
1918
# Interfaces
1919
1920
# Signals
1921
1189
1922
# CheckerCompleted - signal
1190
1923
@dbus.service.signal(_interface, signature="nxs")
1191
1924
def CheckerCompleted(self, exitcode, waitstatus, command):
1192
1925
"D-Bus signal"
1193
1926
pass
1194
1927
1195
1928
# CheckerStarted - signal
1196
1929
@dbus.service.signal(_interface, signature="s")
1197
1930
def CheckerStarted(self, command):
1198
1931
"D-Bus signal"
1199
1932
pass
1200
1933
1201
1934
# PropertyChanged - signal
1935
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1202
1936
@dbus.service.signal(_interface, signature="sv")
1203
1937
def PropertyChanged(self, property, value):
1204
1938
"D-Bus signal"
1205
1939
pass
1206
1940
1207
1941
# GotSecret - signal
1208
1942
@dbus.service.signal(_interface)
1209
1943
def GotSecret(self):
1212
1946
server to mandos-client
1213
1947
"""
1214
1948
pass
1215
1949
1216
1950
# Rejected - signal
1217
1951
@dbus.service.signal(_interface, signature="s")
1218
1952
def Rejected(self, reason):
1219
1953
"D-Bus signal"
1220
1954
pass
1221
1955
1222
1956
# NeedApproval - signal
1223
1957
@dbus.service.signal(_interface, signature="tb")
1224
1958
def NeedApproval(self, timeout, default):
1225
1959
"D-Bus signal"
1226
1960
return self.need_approval()
1227
1228
# NeRwequest - signal
1229
@dbus.service.signal(_interface, signature="s")
1230
def NewRequest(self, ip):
1231
"""D-Bus signal
1232
Is sent after a client request a password.
1233
"""
1234
pass
1235
1236
## Methods
1237
1961
1962
# Methods
1963
1238
1964
# Approve - method
1239
1965
@dbus.service.method(_interface, in_signature="b")
1240
1966
def Approve(self, value):
1241
1967
self.approve(value)
1242
1968
1243
1969
# CheckedOK - method
1244
1970
@dbus.service.method(_interface)
1245
1971
def CheckedOK(self):
1246
1972
self.checked_ok()
1247
1973
1248
1974
# Enable - method
1975
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1249
1976
@dbus.service.method(_interface)
1250
1977
def Enable(self):
1251
1978
"D-Bus method"
1252
1979
self.enable()
1253
1980
1254
1981
# StartChecker - method
1982
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1255
1983
@dbus.service.method(_interface)
1256
1984
def StartChecker(self):
1257
1985
"D-Bus method"
1258
1986
self.start_checker()
1259
1987
1260
1988
# Disable - method
1989
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1261
1990
@dbus.service.method(_interface)
1262
1991
def Disable(self):
1263
1992
"D-Bus method"
1264
1993
self.disable()
1265
1994
1266
1995
# StopChecker - method
1996
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1267
1997
@dbus.service.method(_interface)
1268
1998
def StopChecker(self):
1269
1999
self.stop_checker()
1270
1271
## Properties
1272
2000
2001
# Properties
2002
1273
2003
# ApprovalPending - property
1274
2004
@dbus_service_property(_interface, signature="b", access="read")
1275
2005
def ApprovalPending_dbus_property(self):
1276
2006
return dbus.Boolean(bool(self.approvals_pending))
1277
2007
1278
2008
# ApprovedByDefault - property
1279
@dbus_service_property(_interface, signature="b",
2009
@dbus_service_property(_interface,
2010
signature="b",
1280
2011
access="readwrite")
1281
2012
def ApprovedByDefault_dbus_property(self, value=None):
1282
2013
if value is None: # get
1283
2014
return dbus.Boolean(self.approved_by_default)
1284
2015
self.approved_by_default = bool(value)
1285
2016
1286
2017
# ApprovalDelay - property
1287
@dbus_service_property(_interface, signature="t",
2018
@dbus_service_property(_interface,
2019
signature="t",
1288
2020
access="readwrite")
1289
2021
def ApprovalDelay_dbus_property(self, value=None):
1290
2022
if value is None: # get
1291
return dbus.UInt64(self.approval_delay_milliseconds())
2023
return dbus.UInt64(self.approval_delay.total_seconds()
2024
* 1000)
1292
2025
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1293
2026
1294
2027
# ApprovalDuration - property
1295
@dbus_service_property(_interface, signature="t",
2028
@dbus_service_property(_interface,
2029
signature="t",
1296
2030
access="readwrite")
1297
2031
def ApprovalDuration_dbus_property(self, value=None):
1298
2032
if value is None: # get
1299
return dbus.UInt64(timedelta_to_milliseconds(
1300
self.approval_duration))
2033
return dbus.UInt64(self.approval_duration.total_seconds()
2034
* 1000)
1301
2035
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1302
2036
1303
2037
# Name - property
2038
@dbus_annotations(
2039
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1304
2040
@dbus_service_property(_interface, signature="s", access="read")
1305
2041
def Name_dbus_property(self):
1306
2042
return dbus.String(self.name)
1307
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
1308
2051
# Fingerprint - property
2052
@dbus_annotations(
2053
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1309
2054
@dbus_service_property(_interface, signature="s", access="read")
1310
2055
def Fingerprint_dbus_property(self):
1311
2056
return dbus.String(self.fingerprint)
1312
2057
1313
2058
# Host - property
1314
@dbus_service_property(_interface, signature="s",
2059
@dbus_service_property(_interface,
2060
signature="s",
1315
2061
access="readwrite")
1316
2062
def Host_dbus_property(self, value=None):
1317
2063
if value is None: # get
1318
2064
return dbus.String(self.host)
1319
self.host = unicode(value)
1320
2065
self.host = str(value)
2066
1321
2067
# Created - property
2068
@dbus_annotations(
2069
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1322
2070
@dbus_service_property(_interface, signature="s", access="read")
1323
2071
def Created_dbus_property(self):
1324
2072
return datetime_to_dbus(self.created)
1325
2073
1326
2074
# LastEnabled - property
1327
2075
@dbus_service_property(_interface, signature="s", access="read")
1328
2076
def LastEnabled_dbus_property(self):
1329
2077
return datetime_to_dbus(self.last_enabled)
1330
2078
1331
2079
# Enabled - property
1332
@dbus_service_property(_interface, signature="b",
2080
@dbus_service_property(_interface,
2081
signature="b",
1333
2082
access="readwrite")
1334
2083
def Enabled_dbus_property(self, value=None):
1335
2084
if value is None: # get
1338
2087
self.enable()
1339
2088
else:
1340
2089
self.disable()
1341
2090
1342
2091
# LastCheckedOK - property
1343
@dbus_service_property(_interface, signature="s",
2092
@dbus_service_property(_interface,
2093
signature="s",
1344
2094
access="readwrite")
1345
2095
def LastCheckedOK_dbus_property(self, value=None):
1346
2096
if value is not None:
1347
2097
self.checked_ok()
1348
2098
return
1349
2099
return datetime_to_dbus(self.last_checked_ok)
1350
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
1351
2106
# Expires - property
1352
2107
@dbus_service_property(_interface, signature="s", access="read")
1353
2108
def Expires_dbus_property(self):
1354
2109
return datetime_to_dbus(self.expires)
1355
2110
1356
2111
# LastApprovalRequest - property
1357
2112
@dbus_service_property(_interface, signature="s", access="read")
1358
2113
def LastApprovalRequest_dbus_property(self):
1359
2114
return datetime_to_dbus(self.last_approval_request)
1360
2115
1361
2116
# Timeout - property
1362
@dbus_service_property(_interface, signature="t",
2117
@dbus_service_property(_interface,
2118
signature="t",
1363
2119
access="readwrite")
1364
2120
def Timeout_dbus_property(self, value=None):
1365
2121
if value is None: # get
1366
return dbus.UInt64(self.timeout_milliseconds())
2122
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2123
old_timeout = self.timeout
1367
2124
self.timeout = datetime.timedelta(0, 0, 0, value)
1368
if getattr(self, "disable_initiator_tag", None) is None:
1369
return
1370
# Reschedule timeout
1371
gobject.source_remove(self.disable_initiator_tag)
1372
self.disable_initiator_tag = None
1373
self.expires = None
1374
time_to_die = timedelta_to_milliseconds((self
1375
.last_checked_ok
1376
+ self.timeout)
1377
- datetime.datetime
1378
.utcnow())
1379
if time_to_die <= 0:
1380
# The timeout has passed
1381
self.disable()
1382
else:
1383
self.expires = (datetime.datetime.utcnow()
1384
+ datetime.timedelta(milliseconds =
1385
time_to_die))
1386
self.disable_initiator_tag = (gobject.timeout_add
1387
(time_to_die, self.disable))
1388
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
1389
2141
# ExtendedTimeout - property
1390
@dbus_service_property(_interface, signature="t",
2142
@dbus_service_property(_interface,
2143
signature="t",
1391
2144
access="readwrite")
1392
2145
def ExtendedTimeout_dbus_property(self, value=None):
1393
2146
if value is None: # get
1394
return dbus.UInt64(self.extended_timeout_milliseconds())
2147
return dbus.UInt64(self.extended_timeout.total_seconds()
2148
* 1000)
1395
2149
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1396
2150
1397
2151
# Interval - property
1398
@dbus_service_property(_interface, signature="t",
2152
@dbus_service_property(_interface,
2153
signature="t",
1399
2154
access="readwrite")
1400
2155
def Interval_dbus_property(self, value=None):
1401
2156
if value is None: # get
1402
return dbus.UInt64(self.interval_milliseconds())
2157
return dbus.UInt64(self.interval.total_seconds() * 1000)
1403
2158
self.interval = datetime.timedelta(0, 0, 0, value)
1404
2159
if getattr(self, "checker_initiator_tag", None) is None:
1405
2160
return
1406
2161
if self.enabled:
1407
2162
# Reschedule checker run
1408
gobject.source_remove(self.checker_initiator_tag)
1409
self.checker_initiator_tag = (gobject.timeout_add
1410
(value, self.start_checker))
1411
self.start_checker() # Start one now, too
1412
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
1413
2168
# Checker - property
1414
@dbus_service_property(_interface, signature="s",
2169
@dbus_service_property(_interface,
2170
signature="s",
1415
2171
access="readwrite")
1416
2172
def Checker_dbus_property(self, value=None):
1417
2173
if value is None: # get
1418
2174
return dbus.String(self.checker_command)
1419
self.checker_command = unicode(value)
1420
2175
self.checker_command = str(value)
2176
1421
2177
# CheckerRunning - property
1422
@dbus_service_property(_interface, signature="b",
2178
@dbus_service_property(_interface,
2179
signature="b",
1423
2180
access="readwrite")
1424
2181
def CheckerRunning_dbus_property(self, value=None):
1425
2182
if value is None: # get
1428
2185
self.start_checker()
1429
2186
else:
1430
2187
self.stop_checker()
1431
2188
1432
2189
# ObjectPath - property
2190
@dbus_annotations(
2191
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2192
"org.freedesktop.DBus.Deprecated": "true"})
1433
2193
@dbus_service_property(_interface, signature="o", access="read")
1434
2194
def ObjectPath_dbus_property(self):
1435
return self.dbus_object_path # is already a dbus.ObjectPath
1436
2195
return self.dbus_object_path # is already a dbus.ObjectPath
2196
1437
2197
# Secret = property
1438
@dbus_service_property(_interface, signature="ay",
1439
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)
1440
2205
def Secret_dbus_property(self, value):
1441
self.secret = str(value)
1442
2206
self.secret = bytes(value)
2207
1443
2208
del _interface
1444
2209
1445
2210
1446
2211
class ProxyClient(object):
1447
def __init__(self, child_pipe, fpr, address):
2212
def __init__(self, child_pipe, key_id, fpr, address):
1448
2213
self._pipe = child_pipe
1449
self._pipe.send(('init', fpr, address))
2214
self._pipe.send(('init', key_id, fpr, address))
1450
2215
if not self._pipe.recv():
1451
raise KeyError()
1452
2216
raise KeyError(key_id or fpr)
2217
1453
2218
def __getattribute__(self, name):
1454
2219
if name == '_pipe':
1455
2220
return super(ProxyClient, self).__getattribute__(name)
1458
2223
if data[0] == 'data':
1459
2224
return data[1]
1460
2225
if data[0] == 'function':
2226
1461
2227
def func(*args, **kwargs):
1462
2228
self._pipe.send(('funcall', name, args, kwargs))
1463
2229
return self._pipe.recv()[1]
2230
1464
2231
return func
1465
2232
1466
2233
def __setattr__(self, name, value):
1467
2234
if name == '_pipe':
1468
2235
return super(ProxyClient, self).__setattr__(name, value)
1469
2236
self._pipe.send(('setattr', name, value))
1470
2237
1471
2238
1472
class ClientDBusTransitional(ClientDBus):
1473
__metaclass__ = AlternateDBusNamesMetaclass
1474
1475
1476
2239
class ClientHandler(socketserver.BaseRequestHandler, object):
1477
2240
"""A class to handle client connections.
1478
2241
1479
2242
Instantiated once for each connection to handle it.
1480
2243
Note: This will run in its own forked process."""
1481
2244
1482
2245
def handle(self):
1483
2246
with contextlib.closing(self.server.child_pipe) as child_pipe:
1484
2247
logger.info("TCP connection from: %s",
1485
unicode(self.client_address))
2248
str(self.client_address))
1486
2249
logger.debug("Pipe FD: %d",
1487
2250
self.server.child_pipe.fileno())
1488
1489
session = (gnutls.connection
1490
.ClientSession(self.request,
1491
gnutls.connection
1492
.X509Credentials()))
1493
1494
# Note: gnutls.connection.X509Credentials is really a
1495
# generic GnuTLS certificate credentials object so long as
1496
# no X.509 keys are added to it. Therefore, we can use it
1497
# here despite using OpenPGP certificates.
1498
1499
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1500
# "+AES-256-CBC", "+SHA1",
1501
# "+COMP-NULL", "+CTYPE-OPENPGP",
1502
# "+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"))
1503
2258
# Use a fallback default, since this MUST be set.
1504
2259
priority = self.server.gnutls_priority
1505
2260
if priority is None:
1506
2261
priority = "NORMAL"
1507
(gnutls.library.functions
1508
.gnutls_priority_set_direct(session._c_object,
1509
priority, None))
1510
2262
gnutls.priority_set_direct(session._c_object,
2263
priority.encode("utf-8"),
2264
None)
2265
1511
2266
# Start communication using the Mandos protocol
1512
2267
# Get protocol number
1513
2268
line = self.request.makefile().readline()
1514
2269
logger.debug("Protocol version: %r", line)
1515
2270
try:
1516
2271
if int(line.strip().split()[0]) > 1:
1517
raise RuntimeError
2272
raise RuntimeError(line)
1518
2273
except (ValueError, IndexError, RuntimeError) as error:
1519
2274
logger.error("Unknown protocol version: %s", error)
1520
2275
return
1521
2276
1522
2277
# Start GnuTLS connection
1523
2278
try:
1524
2279
session.handshake()
1525
except gnutls.errors.GNUTLSError as error:
2280
except gnutls.Error as error:
1526
2281
logger.warning("Handshake failed: %s", error)
1527
2282
# Do not run session.bye() here: the session is not
1528
2283
# established. Just abandon the request.
1529
2284
return
1530
2285
logger.debug("Handshake succeeded")
1531
2286
1532
2287
approval_required = False
1533
2288
try:
1534
try:
1535
fpr = self.fingerprint(self.peer_certificate
1536
(session))
1537
except (TypeError,
1538
gnutls.errors.GNUTLSError) as error:
1539
logger.warning("Bad certificate: %s", error)
1540
return
1541
logger.debug("Fingerprint: %s", fpr)
1542
1543
try:
1544
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,
1545
2311
self.client_address)
1546
2312
except KeyError:
1547
2313
return
1548
1549
if self.server.use_dbus:
1550
# Emit D-Bus signal
1551
client.NewRequest(str(self.client_address))
1552
2314
1553
2315
if client.approval_delay:
1554
2316
delay = client.approval_delay
1555
2317
client.approvals_pending += 1
1556
2318
approval_required = True
1557
2319
1558
2320
while True:
1559
2321
if not client.enabled:
1560
2322
logger.info("Client %s is disabled",
1561
client.name)
2323
client.name)
1562
2324
if self.server.use_dbus:
1563
2325
# Emit D-Bus signal
1564
2326
client.Rejected("Disabled")
1565
2327
return
1566
2328
1567
2329
if client.approved or not client.approval_delay:
1568
#We are approved or approval is disabled
2330
# We are approved or approval is disabled
1569
2331
break
1570
2332
elif client.approved is None:
1571
2333
logger.info("Client %s needs approval",
1573
2335
if self.server.use_dbus:
1574
2336
# Emit D-Bus signal
1575
2337
client.NeedApproval(
1576
client.approval_delay_milliseconds(),
1577
client.approved_by_default)
2338
client.approval_delay.total_seconds()
2339
* 1000, client.approved_by_default)
1578
2340
else:
1579
2341
logger.warning("Client %s was not approved",
1580
2342
client.name)
1582
2344
# Emit D-Bus signal
1583
2345
client.Rejected("Denied")
1584
2346
return
1585
1586
#wait until timeout or approved
2347
2348
# wait until timeout or approved
1587
2349
time = datetime.datetime.now()
1588
2350
client.changedstate.acquire()
1589
(client.changedstate.wait
1590
(float(client.timedelta_to_milliseconds(delay)
1591
/ 1000)))
2351
client.changedstate.wait(delay.total_seconds())
1592
2352
client.changedstate.release()
1593
2353
time2 = datetime.datetime.now()
1594
2354
if (time2 - time) >= delay:
1604
2364
break
1605
2365
else:
1606
2366
delay -= time2 - time
1607
1608
sent_size = 0
1609
while sent_size < len(client.secret):
1610
try:
1611
sent = session.send(client.secret[sent_size:])
1612
except gnutls.errors.GNUTLSError as error:
1613
logger.warning("gnutls send failed")
1614
return
1615
logger.debug("Sent: %d, remaining: %d",
1616
sent, len(client.secret)
1617
- (sent_size + sent))
1618
sent_size += sent
1619
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
1620
2375
logger.info("Sending secret to %s", client.name)
1621
2376
# bump the timeout using extended_timeout
1622
client.checked_ok(client.extended_timeout)
2377
client.bump_timeout(client.extended_timeout)
1623
2378
if self.server.use_dbus:
1624
2379
# Emit D-Bus signal
1625
2380
client.GotSecret()
1626
2381
1627
2382
finally:
1628
2383
if approval_required:
1629
2384
client.approvals_pending -= 1
1630
2385
try:
1631
2386
session.bye()
1632
except gnutls.errors.GNUTLSError as error:
1633
logger.warning("GnuTLS bye failed")
1634
2387
except gnutls.Error as error:
2388
logger.warning("GnuTLS bye failed",
2389
exc_info=error)
2390
1635
2391
@staticmethod
1636
2392
def peer_certificate(session):
1637
"Return the peer's OpenPGP certificate as a bytestring"
1638
# If not an OpenPGP certificate...
1639
if (gnutls.library.functions
1640
.gnutls_certificate_type_get(session._c_object)
1641
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1642
# ...do the normal thing
1643
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""
1644
2409
list_size = ctypes.c_uint(1)
1645
cert_list = (gnutls.library.functions
1646
.gnutls_certificate_get_peers
2410
cert_list = (gnutls.certificate_get_peers
1647
2411
(session._c_object, ctypes.byref(list_size)))
1648
2412
if not bool(cert_list) and list_size.value != 0:
1649
raise gnutls.errors.GNUTLSError("error getting peer"
1650
" certificate")
2413
raise gnutls.Error("error getting peer certificate")
1651
2414
if list_size.value == 0:
1652
2415
return None
1653
2416
cert = cert_list[0]
1654
2417
return ctypes.string_at(cert.data, cert.size)
1655
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
1656
2453
@staticmethod
1657
2454
def fingerprint(openpgp):
1658
2455
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1659
2456
# New GnuTLS "datum" with the OpenPGP public key
1660
datum = (gnutls.library.types
1661
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1662
ctypes.POINTER
1663
(ctypes.c_ubyte)),
1664
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)))
1665
2461
# New empty GnuTLS certificate
1666
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1667
(gnutls.library.functions
1668
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2462
crt = gnutls.openpgp_crt_t()
2463
gnutls.openpgp_crt_init(ctypes.byref(crt))
1669
2464
# Import the OpenPGP public key into the certificate
1670
(gnutls.library.functions
1671
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1672
gnutls.library.constants
1673
.GNUTLS_OPENPGP_FMT_RAW))
2465
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2466
gnutls.OPENPGP_FMT_RAW)
1674
2467
# Verify the self signature in the key
1675
2468
crtverify = ctypes.c_uint()
1676
(gnutls.library.functions
1677
.gnutls_openpgp_crt_verify_self(crt, 0,
1678
ctypes.byref(crtverify)))
2469
gnutls.openpgp_crt_verify_self(crt, 0,
2470
ctypes.byref(crtverify))
1679
2471
if crtverify.value != 0:
1680
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1681
raise (gnutls.errors.CertificateSecurityError
1682
("Verify failed"))
2472
gnutls.openpgp_crt_deinit(crt)
2473
raise gnutls.CertificateSecurityError(code
2474
=crtverify.value)
1683
2475
# New buffer for the fingerprint
1684
2476
buf = ctypes.create_string_buffer(20)
1685
2477
buf_len = ctypes.c_size_t()
1686
2478
# Get the fingerprint from the certificate into the buffer
1687
(gnutls.library.functions
1688
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1689
ctypes.byref(buf_len)))
2479
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2480
ctypes.byref(buf_len))
1690
2481
# Deinit the certificate
1691
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2482
gnutls.openpgp_crt_deinit(crt)
1692
2483
# Convert the buffer to a Python bytestring
1693
2484
fpr = ctypes.string_at(buf, buf_len.value)
1694
2485
# Convert the bytestring to hexadecimal notation
1698
2489
1699
2490
class MultiprocessingMixIn(object):
1700
2491
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2492
1701
2493
def sub_process_main(self, request, address):
1702
2494
try:
1703
2495
self.finish_request(request, address)
1704
2496
except Exception:
1705
2497
self.handle_error(request, address)
1706
2498
self.close_request(request)
1707
2499
1708
2500
def process_request(self, request, address):
1709
2501
"""Start a new process to process the request."""
1710
proc = multiprocessing.Process(target = self.sub_process_main,
1711
args = (request,
1712
address))
2502
proc = multiprocessing.Process(target=self.sub_process_main,
2503
args=(request, address))
1713
2504
proc.start()
1714
2505
return proc
1715
2506
1716
2507
1717
2508
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1718
2509
""" adds a pipe to the MixIn """
2510
1719
2511
def process_request(self, request, client_address):
1720
2512
"""Overrides and wraps the original process_request().
1721
2513
1722
2514
This function creates a new pipe in self.pipe
1723
2515
"""
1724
2516
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1725
2517
1726
2518
proc = MultiprocessingMixIn.process_request(self, request,
1727
2519
client_address)
1728
2520
self.child_pipe.close()
1729
2521
self.add_pipe(parent_pipe, proc)
1730
2522
1731
2523
def add_pipe(self, parent_pipe, proc):
1732
2524
"""Dummy function; override as necessary"""
1733
raise NotImplementedError
2525
raise NotImplementedError()
1734
2526
1735
2527
1736
2528
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1737
2529
socketserver.TCPServer, object):
1738
2530
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1739
2531
1740
2532
Attributes:
1741
2533
enabled: Boolean; whether this server is activated yet
1742
2534
interface: None or a network interface name (string)
1743
2535
use_ipv6: Boolean; to use IPv6 or not
1744
2536
"""
2537
1745
2538
def __init__(self, server_address, RequestHandlerClass,
1746
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
"""
1747
2545
self.interface = interface
1748
2546
if use_ipv6:
1749
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.
1750
2575
socketserver.TCPServer.__init__(self, server_address,
1751
2576
RequestHandlerClass)
2577
1752
2578
def server_bind(self):
1753
2579
"""This overrides the normal server_bind() function
1754
2580
to bind to an interface if one was specified, and also NOT to
1755
2581
bind to an address or port if they were not specified."""
2582
global SO_BINDTODEVICE
1756
2583
if self.interface is not None:
1757
2584
if SO_BINDTODEVICE is None:
1758
logger.error("SO_BINDTODEVICE does not exist;"
1759
" cannot bind to interface %s",
1760
self.interface)
1761
else:
1762
try:
1763
self.socket.setsockopt(socket.SOL_SOCKET,
1764
SO_BINDTODEVICE,
1765
str(self.interface
1766
+ '\0'))
1767
except socket.error as error:
1768
if error[0] == errno.EPERM:
1769
logger.error("No permission to"
1770
" bind to interface %s",
1771
self.interface)
1772
elif error[0] == errno.ENOPROTOOPT:
1773
logger.error("SO_BINDTODEVICE not available;"
1774
" cannot bind to interface %s",
1775
self.interface)
1776
else:
1777
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
1778
2606
# Only bind(2) the socket if we really need to.
1779
2607
if self.server_address[0] or self.server_address[1]:
1780
2608
if not self.server_address[0]:
1781
2609
if self.address_family == socket.AF_INET6:
1782
any_address = "::" # in6addr_any
2610
any_address = "::" # in6addr_any
1783
2611
else:
1784
any_address = socket.INADDR_ANY
2612
any_address = "0.0.0.0" # INADDR_ANY
1785
2613
self.server_address = (any_address,
1786
2614
self.server_address[1])
1787
2615
elif not self.server_address[1]:
1788
self.server_address = (self.server_address[0],
1789
0)
2616
self.server_address = (self.server_address[0], 0)
1790
2617
# if self.interface:
1791
2618
# self.server_address = (self.server_address[0],
1792
2619
# 0, # port
1798
2625
1799
2626
class MandosServer(IPv6_TCPServer):
1800
2627
"""Mandos server.
1801
2628
1802
2629
Attributes:
1803
2630
clients: set of Client objects
1804
2631
gnutls_priority GnuTLS priority string
1805
2632
use_dbus: Boolean; to emit D-Bus signals or not
1806
1807
Assumes a gobject.MainLoop event loop.
2633
2634
Assumes a GLib.MainLoop event loop.
1808
2635
"""
2636
1809
2637
def __init__(self, server_address, RequestHandlerClass,
1810
interface=None, use_ipv6=True, clients=None,
1811
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):
1812
2644
self.enabled = False
1813
2645
self.clients = clients
1814
2646
if self.clients is None:
1817
2649
self.gnutls_priority = gnutls_priority
1818
2650
IPv6_TCPServer.__init__(self, server_address,
1819
2651
RequestHandlerClass,
1820
interface = interface,
1821
use_ipv6 = use_ipv6)
2652
interface=interface,
2653
use_ipv6=use_ipv6,
2654
socketfd=socketfd)
2655
1822
2656
def server_activate(self):
1823
2657
if self.enabled:
1824
2658
return socketserver.TCPServer.server_activate(self)
1825
2659
1826
2660
def enable(self):
1827
2661
self.enabled = True
1828
2662
1829
2663
def add_pipe(self, parent_pipe, proc):
1830
2664
# Call "handle_ipc" for both data and EOF events
1831
gobject.io_add_watch(parent_pipe.fileno(),
1832
gobject.IO_IN | gobject.IO_HUP,
1833
functools.partial(self.handle_ipc,
1834
parent_pipe =
1835
parent_pipe,
1836
proc = proc))
1837
1838
def handle_ipc(self, source, condition, parent_pipe=None,
1839
proc = None, client_object=None):
1840
condition_names = {
1841
gobject.IO_IN: "IN", # There is data to read.
1842
gobject.IO_OUT: "OUT", # Data can be written (without
1843
# blocking).
1844
gobject.IO_PRI: "PRI", # There is urgent data to read.
1845
gobject.IO_ERR: "ERR", # Error condition.
1846
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1847
# broken, usually for pipes and
1848
# sockets).
1849
}
1850
conditions_string = ' | '.join(name
1851
for cond, name in
1852
condition_names.iteritems()
1853
if cond & condition)
2665
GLib.io_add_watch(
2666
parent_pipe.fileno(),
2667
GLib.IO_IN | GLib.IO_HUP,
2668
functools.partial(self.handle_ipc,
2669
parent_pipe=parent_pipe,
2670
proc=proc))
2671
2672
def handle_ipc(self, source, condition,
2673
parent_pipe=None,
2674
proc=None,
2675
client_object=None):
1854
2676
# error, or the other end of multiprocessing.Pipe has closed
1855
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2677
if condition & (GLib.IO_ERR | GLib.IO_HUP):
1856
2678
# Wait for other process to exit
1857
2679
proc.join()
1858
2680
return False
1859
2681
1860
2682
# Read a request from the child
1861
2683
request = parent_pipe.recv()
1862
2684
command = request[0]
1863
2685
1864
2686
if command == 'init':
1865
fpr = request[1]
1866
address = request[2]
1867
1868
for c in self.clients.itervalues():
1869
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:
1870
2698
client = c
1871
2699
break
1872
2700
else:
1873
logger.info("Client not found for fingerprint: %s, ad"
1874
"dress: %s", fpr, address)
2701
logger.info("Client not found for key ID: %s, address"
2702
": %s", key_id or fpr, address)
1875
2703
if self.use_dbus:
1876
2704
# Emit D-Bus signal
1877
mandos_dbus_service.ClientNotFound(fpr,
2705
mandos_dbus_service.ClientNotFound(key_id or fpr,
1878
2706
address[0])
1879
2707
parent_pipe.send(False)
1880
2708
return False
1881
1882
gobject.io_add_watch(parent_pipe.fileno(),
1883
gobject.IO_IN | gobject.IO_HUP,
1884
functools.partial(self.handle_ipc,
1885
parent_pipe =
1886
parent_pipe,
1887
proc = proc,
1888
client_object =
1889
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))
1890
2717
parent_pipe.send(True)
1891
2718
# remove the old hook in favor of the new above hook on
1892
2719
# same fileno
1895
2722
funcname = request[1]
1896
2723
args = request[2]
1897
2724
kwargs = request[3]
1898
2725
1899
2726
parent_pipe.send(('data', getattr(client_object,
1900
2727
funcname)(*args,
1901
**kwargs)))
1902
2728
**kwargs)))
2729
1903
2730
if command == 'getattr':
1904
2731
attrname = request[1]
1905
if callable(client_object.__getattribute__(attrname)):
1906
parent_pipe.send(('function',))
2732
if isinstance(client_object.__getattribute__(attrname),
2733
collections.Callable):
2734
parent_pipe.send(('function', ))
1907
2735
else:
1908
parent_pipe.send(('data', client_object
1909
.__getattribute__(attrname)))
1910
2736
parent_pipe.send((
2737
'data', client_object.__getattribute__(attrname)))
2738
1911
2739
if command == 'setattr':
1912
2740
attrname = request[1]
1913
2741
value = request[2]
1914
2742
setattr(client_object, attrname, value)
1915
2743
1916
2744
return True
1917
2745
1918
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
1919
2846
def string_to_delta(interval):
1920
2847
"""Parse a string and return a datetime.timedelta
1921
2848
1922
2849
>>> string_to_delta('7d')
1923
2850
datetime.timedelta(7)
1924
2851
>>> string_to_delta('60s')
1932
2859
>>> string_to_delta('5m 30s')
1933
2860
datetime.timedelta(0, 330)
1934
2861
"""
2862
2863
try:
2864
return rfc3339_duration_to_delta(interval)
2865
except ValueError:
2866
pass
2867
1935
2868
timevalue = datetime.timedelta(0)
1936
2869
for s in interval.split():
1937
2870
try:
1938
suffix = unicode(s[-1])
2871
suffix = s[-1]
1939
2872
value = int(s[:-1])
1940
2873
if suffix == "d":
1941
2874
delta = datetime.timedelta(value)
1948
2881
elif suffix == "w":
1949
2882
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1950
2883
else:
1951
raise ValueError("Unknown suffix %r" % suffix)
1952
except (ValueError, IndexError) as e:
2884
raise ValueError("Unknown suffix {!r}".format(suffix))
2885
except IndexError as e:
1953
2886
raise ValueError(*(e.args))
1954
2887
timevalue += delta
1955
2888
return timevalue
1956
2889
1957
2890
1958
def daemon(nochdir = False, noclose = False):
2891
def daemon(nochdir=False, noclose=False):
1959
2892
"""See daemon(3). Standard BSD Unix function.
1960
2893
1961
2894
This should really exist as os.daemon, but it doesn't (yet)."""
1962
2895
if os.fork():
1963
2896
sys.exit()
1968
2901
sys.exit()
1969
2902
if not noclose:
1970
2903
# Close all standard open file descriptors
1971
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2904
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1972
2905
if not stat.S_ISCHR(os.fstat(null).st_mode):
1973
2906
raise OSError(errno.ENODEV,
1974
"%s not a character device"
1975
% os.path.devnull)
2907
"{} not a character device"
2908
.format(os.devnull))
1976
2909
os.dup2(null, sys.stdin.fileno())
1977
2910
os.dup2(null, sys.stdout.fileno())
1978
2911
os.dup2(null, sys.stderr.fileno())
1981
2914
1982
2915
1983
2916
def main():
1984
2917
1985
2918
##################################################################
1986
2919
# Parsing of options, both command line and config file
1987
2920
1988
2921
parser = argparse.ArgumentParser()
1989
2922
parser.add_argument("-v", "--version", action="version",
1990
version = "%%(prog)s %s" % version,
2923
version="%(prog)s {}".format(version),
1991
2924
help="show version number and exit")
1992
2925
parser.add_argument("-i", "--interface", metavar="IF",
1993
2926
help="Bind to interface IF")
1999
2932
help="Run self-test")
2000
2933
parser.add_argument("--debug", action="store_true",
2001
2934
help="Debug mode; run in foreground and log"
2002
" to terminal")
2935
" to terminal", default=None)
2003
2936
parser.add_argument("--debuglevel", metavar="LEVEL",
2004
2937
help="Debug level for stdout output")
2005
2938
parser.add_argument("--priority", help="GnuTLS"
2012
2945
" files")
2013
2946
parser.add_argument("--no-dbus", action="store_false",
2014
2947
dest="use_dbus", help="Do not provide D-Bus"
2015
" system bus interface")
2948
" system bus interface", default=None)
2016
2949
parser.add_argument("--no-ipv6", action="store_false",
2017
dest="use_ipv6", help="Do not use IPv6")
2950
dest="use_ipv6", help="Do not use IPv6",
2951
default=None)
2018
2952
parser.add_argument("--no-restore", action="store_false",
2019
2953
dest="restore", help="Do not restore stored"
2020
" state")
2954
" state", default=None)
2955
parser.add_argument("--socket", type=int,
2956
help="Specify a file descriptor to a network"
2957
" socket to use instead of creating one")
2021
2958
parser.add_argument("--statedir", metavar="DIR",
2022
2959
help="Directory to save/restore state in")
2023
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
2024
2966
options = parser.parse_args()
2025
2967
2026
2968
if options.check:
2027
2969
import doctest
2028
doctest.testmod()
2029
sys.exit()
2030
2970
fail_count, test_count = doctest.testmod()
2971
sys.exit(os.EX_OK if fail_count == 0 else 1)
2972
2031
2973
# Default values for config file for server-global settings
2032
server_defaults = { "interface": "",
2033
"address": "",
2034
"port": "",
2035
"debug": "False",
2036
"priority":
2037
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2038
"servicename": "Mandos",
2039
"use_dbus": "True",
2040
"use_ipv6": "True",
2041
"debuglevel": "",
2042
"restore": "True",
2043
"statedir": "/var/lib/mandos"
2044
}
2045
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
2046
2997
# Parse config file for server-global settings
2047
2998
server_config = configparser.SafeConfigParser(server_defaults)
2048
2999
del server_defaults
2049
server_config.read(os.path.join(options.configdir,
2050
"mandos.conf"))
3000
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2051
3001
# Convert the SafeConfigParser object to a dict
2052
3002
server_settings = server_config.defaults()
2053
3003
# Use the appropriate methods on the non-string config options
2054
for option in ("debug", "use_dbus", "use_ipv6"):
3004
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3005
"foreground", "zeroconf"):
2055
3006
server_settings[option] = server_config.getboolean("DEFAULT",
2056
3007
option)
2057
3008
if server_settings["port"]:
2058
3009
server_settings["port"] = server_config.getint("DEFAULT",
2059
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"])
2060
3020
del server_config
2061
3021
2062
3022
# Override the settings from the config file with command line
2063
3023
# options, if set.
2064
3024
for option in ("interface", "address", "port", "debug",
2065
"priority", "servicename", "configdir",
2066
"use_dbus", "use_ipv6", "debuglevel", "restore",
2067
"statedir"):
3025
"priority", "servicename", "configdir", "use_dbus",
3026
"use_ipv6", "debuglevel", "restore", "statedir",
3027
"socket", "foreground", "zeroconf"):
2068
3028
value = getattr(options, option)
2069
3029
if value is not None:
2070
3030
server_settings[option] = value
2071
3031
del options
2072
3032
# Force all strings to be unicode
2073
3033
for option in server_settings.keys():
2074
if type(server_settings[option]) is str:
2075
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
2076
3044
# Now we have our good server settings in "server_settings"
2077
3045
2078
3046
##################################################################
2079
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
2080
3053
# For convenience
2081
3054
debug = server_settings["debug"]
2082
3055
debuglevel = server_settings["debuglevel"]
2084
3057
use_ipv6 = server_settings["use_ipv6"]
2085
3058
stored_state_path = os.path.join(server_settings["statedir"],
2086
3059
stored_state_file)
2087
3060
foreground = server_settings["foreground"]
3061
zeroconf = server_settings["zeroconf"]
3062
2088
3063
if debug:
2089
3064
initlogger(debug, logging.DEBUG)
2090
3065
else:
2093
3068
else:
2094
3069
level = getattr(logging, debuglevel.upper())
2095
3070
initlogger(debug, level)
2096
3071
2097
3072
if server_settings["servicename"] != "Mandos":
2098
syslogger.setFormatter(logging.Formatter
2099
('Mandos (%s) [%%(process)d]:'
2100
' %%(levelname)s: %%(message)s'
2101
% server_settings["servicename"]))
2102
3073
syslogger.setFormatter(
3074
logging.Formatter('Mandos ({}) [%(process)d]:'
3075
' %(levelname)s: %(message)s'.format(
3076
server_settings["servicename"])))
3077
2103
3078
# Parse config file with clients
2104
client_config = configparser.SafeConfigParser(Client.client_defaults)
3079
client_config = configparser.SafeConfigParser(Client
3080
.client_defaults)
2105
3081
client_config.read(os.path.join(server_settings["configdir"],
2106
3082
"clients.conf"))
2107
3083
2108
3084
global mandos_dbus_service
2109
3085
mandos_dbus_service = None
2110
2111
tcp_server = MandosServer((server_settings["address"],
2112
server_settings["port"]),
2113
ClientHandler,
2114
interface=(server_settings["interface"]
2115
or None),
2116
use_ipv6=use_ipv6,
2117
gnutls_priority=
2118
server_settings["priority"],
2119
use_dbus=use_dbus)
2120
if not debug:
2121
pidfilename = "/var/run/mandos.pid"
2122
try:
2123
pidfile = open(pidfilename, "w")
2124
except IOError:
2125
logger.error("Could not open file %r", pidfilename)
2126
2127
try:
2128
uid = pwd.getpwnam("_mandos").pw_uid
2129
gid = pwd.getpwnam("_mandos").pw_gid
2130
except KeyError:
2131
try:
2132
uid = pwd.getpwnam("mandos").pw_uid
2133
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
2134
3116
except KeyError:
2135
try:
2136
uid = pwd.getpwnam("nobody").pw_uid
2137
gid = pwd.getpwnam("nobody").pw_gid
2138
except KeyError:
2139
uid = 65534
2140
gid = 65534
3117
continue
3118
else:
3119
uid = 65534
3120
gid = 65534
2141
3121
try:
2142
3122
os.setgid(gid)
2143
3123
os.setuid(uid)
3124
if debug:
3125
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3126
gid))
2144
3127
except OSError as error:
2145
if error[0] != errno.EPERM:
2146
raise error
2147
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
2148
3133
if debug:
2149
3134
# Enable all possible GnuTLS debugging
2150
3135
2151
3136
# "Use a log level over 10 to enable all debugging options."
2152
3137
# - GnuTLS manual
2153
gnutls.library.functions.gnutls_global_set_log_level(11)
2154
2155
@gnutls.library.types.gnutls_log_func
3138
gnutls.global_set_log_level(11)
3139
3140
@gnutls.log_func
2156
3141
def debug_gnutls(level, string):
2157
3142
logger.debug("GnuTLS: %s", string[:-1])
2158
2159
(gnutls.library.functions
2160
.gnutls_global_set_log_function(debug_gnutls))
2161
3143
3144
gnutls.global_set_log_function(debug_gnutls)
3145
2162
3146
# Redirect stdin so all checkers get /dev/null
2163
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3147
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2164
3148
os.dup2(null, sys.stdin.fileno())
2165
3149
if null > 2:
2166
3150
os.close(null)
2167
3151
2168
3152
# Need to fork before connecting to D-Bus
2169
if not debug:
3153
if not foreground:
2170
3154
# Close all input and output, do double fork, etc.
2171
3155
daemon()
2172
2173
gobject.threads_init()
2174
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
2175
3161
global main_loop
2176
3162
# From the Avahi example code
2177
DBusGMainLoop(set_as_default=True )
2178
main_loop = gobject.MainLoop()
3163
DBusGMainLoop(set_as_default=True)
3164
main_loop = GLib.MainLoop()
2179
3165
bus = dbus.SystemBus()
2180
3166
# End of Avahi example code
2181
3167
if use_dbus:
2182
3168
try:
2183
3169
bus_name = dbus.service.BusName("se.recompile.Mandos",
2184
bus, do_not_queue=True)
2185
old_bus_name = (dbus.service.BusName
2186
("se.bsnet.fukt.Mandos", bus,
2187
do_not_queue=True))
2188
except dbus.exceptions.NameExistsException as e:
2189
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)
2190
3177
use_dbus = False
2191
3178
server_settings["use_dbus"] = False
2192
3179
tcp_server.use_dbus = False
2193
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2194
service = AvahiServiceToSyslog(name =
2195
server_settings["servicename"],
2196
servicetype = "_mandos._tcp",
2197
protocol = protocol, bus = bus)
2198
if server_settings["interface"]:
2199
service.interface = (if_nametoindex
2200
(str(server_settings["interface"])))
2201
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
2202
3191
global multiprocessing_manager
2203
3192
multiprocessing_manager = multiprocessing.Manager()
2204
3193
2205
3194
client_class = Client
2206
3195
if use_dbus:
2207
client_class = functools.partial(ClientDBusTransitional,
2208
bus = bus)
2209
3196
client_class = functools.partial(ClientDBus, bus=bus)
3197
2210
3198
client_settings = Client.config_parser(client_config)
2211
3199
old_client_settings = {}
2212
3200
clients_data = {}
2213
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
2214
3210
# Get client data and settings from last running state.
2215
3211
if server_settings["restore"]:
2216
3212
try:
2217
3213
with open(stored_state_path, "rb") as stored_state:
2218
clients_data, old_client_settings = (pickle.load
2219
(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"))
2220
3263
os.remove(stored_state_path)
2221
3264
except IOError as e:
2222
logger.warning("Could not load persistent state: {0}"
2223
.format(e))
2224
if e.errno != errno.ENOENT:
3265
if e.errno == errno.ENOENT:
3266
logger.warning("Could not load persistent state:"
3267
" {}".format(os.strerror(e.errno)))
3268
else:
3269
logger.critical("Could not load persistent state:",
3270
exc_info=e)
2225
3271
raise
2226
3272
except EOFError as e:
2227
3273
logger.warning("Could not load persistent state: "
2228
"EOFError: {0}".format(e))
2229
3274
"EOFError:",
3275
exc_info=e)
3276
2230
3277
with PGPEngine() as pgp:
2231
for client_name, client in clients_data.iteritems():
3278
for client_name, client in clients_data.items():
3279
# Skip removed clients
3280
if client_name not in client_settings:
3281
continue
3282
2232
3283
# Decide which value to use after restoring saved state.
2233
3284
# We have three different values: Old config file,
2234
3285
# new config file, and saved state.
2239
3290
# For each value in new config, check if it
2240
3291
# differs from the old config value (Except for
2241
3292
# the "secret" attribute)
2242
if (name != "secret" and
2243
value != old_client_settings[client_name]
2244
[name]):
3293
if (name != "secret"
3294
and (value !=
3295
old_client_settings[client_name][name])):
2245
3296
client[name] = value
2246
3297
except KeyError:
2247
3298
pass
2248
3299
2249
3300
# Clients who has passed its expire date can still be
2250
# enabled if its last checker was successful. Clients
2251
# whose checker failed before we stored its state is
2252
# assumed to have failed all checkers during downtime.
3301
# enabled if its last checker was successful. A Client
3302
# whose checker succeeded before we stored its state is
3303
# assumed to have successfully run all checkers during
3304
# downtime.
2253
3305
if client["enabled"]:
2254
3306
if datetime.datetime.utcnow() >= client["expires"]:
2255
3307
if not client["last_checked_ok"]:
2256
3308
logger.warning(
2257
"disabling client {0} - Client never "
2258
"performed a successfull checker"
2259
.format(client["name"]))
3309
"disabling client {} - Client never "
3310
"performed a successful checker".format(
3311
client_name))
2260
3312
client["enabled"] = False
2261
3313
elif client["last_checker_status"] != 0:
2262
3314
logger.warning(
2263
"disabling client {0} - Client "
2264
"last checker failed with error code {1}"
2265
.format(client["name"],
2266
client["last_checker_status"]))
3315
"disabling client {} - Client last"
3316
" checker failed with error code"
3317
" {}".format(
3318
client_name,
3319
client["last_checker_status"]))
2267
3320
client["enabled"] = False
2268
3321
else:
2269
client["expires"] = (datetime.datetime
2270
.utcnow()
2271
+ client["timeout"])
3322
client["expires"] = (
3323
datetime.datetime.utcnow()
3324
+ client["timeout"])
2272
3325
logger.debug("Last checker succeeded,"
2273
" keeping {0} enabled"
2274
.format(client["name"]))
3326
" keeping {} enabled".format(
3327
client_name))
2275
3328
try:
2276
client["secret"] = (
2277
pgp.decrypt(client["encrypted_secret"],
2278
client_settings[client_name]
2279
["secret"]))
3329
client["secret"] = pgp.decrypt(
3330
client["encrypted_secret"],
3331
client_settings[client_name]["secret"])
2280
3332
except PGPError:
2281
3333
# If decryption fails, we use secret from new settings
2282
logger.debug("Failed to decrypt {0} old secret"
2283
.format(client_name))
2284
client["secret"] = (
2285
client_settings[client_name]["secret"])
3334
logger.debug("Failed to decrypt {} old secret".format(
3335
client_name))
3336
client["secret"] = (client_settings[client_name]
3337
["secret"])
2286
3338
2287
2288
3339
# Add/remove clients based on new changes made to config
2289
for client_name in set(old_client_settings) - set(client_settings):
3340
for client_name in (set(old_client_settings)
3341
- set(client_settings)):
2290
3342
del clients_data[client_name]
2291
for client_name in set(client_settings) - set(old_client_settings):
3343
for client_name in (set(client_settings)
3344
- set(old_client_settings)):
2292
3345
clients_data[client_name] = client_settings[client_name]
2293
3346
2294
# Create clients all clients
2295
for client_name, client in clients_data.iteritems():
3347
# Create all client objects
3348
for client_name, client in clients_data.items():
2296
3349
tcp_server.clients[client_name] = client_class(
2297
name = client_name, settings = client)
2298
3350
name=client_name,
3351
settings=client,
3352
server_settings=server_settings)
3353
2299
3354
if not tcp_server.clients:
2300
3355
logger.warning("No clients defined")
2301
2302
if not debug:
2303
try:
2304
with pidfile:
2305
pid = os.getpid()
2306
pidfile.write(str(pid) + "\n".encode("utf-8"))
2307
del pidfile
2308
except IOError:
2309
logger.error("Could not write to file %r with PID %d",
2310
pidfilename, pid)
2311
except NameError:
2312
# "pidfile" was never created
2313
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
2314
3367
del pidfilename
2315
signal.signal(signal.SIGINT, signal.SIG_IGN)
2316
2317
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2318
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2319
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
2320
3373
if use_dbus:
2321
class MandosDBusService(dbus.service.Object):
3374
3375
@alternate_dbus_interfaces(
3376
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3377
class MandosDBusService(DBusObjectWithObjectManager):
2322
3378
"""A D-Bus proxy object"""
3379
2323
3380
def __init__(self):
2324
3381
dbus.service.Object.__init__(self, bus, "/")
3382
2325
3383
_interface = "se.recompile.Mandos"
2326
3384
2327
3385
@dbus.service.signal(_interface, signature="o")
2328
3386
def ClientAdded(self, objpath):
2329
3387
"D-Bus signal"
2330
3388
pass
2331
3389
2332
3390
@dbus.service.signal(_interface, signature="ss")
2333
def ClientNotFound(self, fingerprint, address):
3391
def ClientNotFound(self, key_id, address):
2334
3392
"D-Bus signal"
2335
3393
pass
2336
3394
3395
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3396
"true"})
2337
3397
@dbus.service.signal(_interface, signature="os")
2338
3398
def ClientRemoved(self, objpath, name):
2339
3399
"D-Bus signal"
2340
3400
pass
2341
3401
3402
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3403
"true"})
2342
3404
@dbus.service.method(_interface, out_signature="ao")
2343
3405
def GetAllClients(self):
2344
3406
"D-Bus method"
2345
return dbus.Array(c.dbus_object_path
2346
for c in
2347
tcp_server.clients.itervalues())
2348
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"})
2349
3412
@dbus.service.method(_interface,
2350
3413
out_signature="a{oa{sv}}")
2351
3414
def GetAllClientsWithProperties(self):
2352
3415
"D-Bus method"
2353
3416
return dbus.Dictionary(
2354
((c.dbus_object_path, c.GetAll(""))
2355
for c in tcp_server.clients.itervalues()),
3417
{c.dbus_object_path: c.GetAll(
3418
"se.recompile.Mandos.Client")
3419
for c in tcp_server.clients.values()},
2356
3420
signature="oa{sv}")
2357
3421
2358
3422
@dbus.service.method(_interface, in_signature="o")
2359
3423
def RemoveClient(self, object_path):
2360
3424
"D-Bus method"
2361
for c in tcp_server.clients.itervalues():
3425
for c in tcp_server.clients.values():
2362
3426
if c.dbus_object_path == object_path:
2363
3427
del tcp_server.clients[c.name]
2364
3428
c.remove_from_connection()
2365
# Don't signal anything except ClientRemoved
3429
# Don't signal the disabling
2366
3430
c.disable(quiet=True)
2367
# Emit D-Bus signal
2368
self.ClientRemoved(object_path, c.name)
3431
# Emit D-Bus signal for removal
3432
self.client_removed_signal(c)
2369
3433
return
2370
3434
raise KeyError(object_path)
2371
3435
2372
3436
del _interface
2373
2374
class MandosDBusServiceTransitional(MandosDBusService):
2375
__metaclass__ = AlternateDBusNamesMetaclass
2376
mandos_dbus_service = MandosDBusServiceTransitional()
2377
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
2378
3481
def cleanup():
2379
3482
"Cleanup function; run on exit"
2380
service.cleanup()
2381
2382
multiprocessing.active_children()
3483
if zeroconf:
3484
service.cleanup()
3485
3486
mp.active_children()
3487
wn.close()
2383
3488
if not (tcp_server.clients or client_settings):
2384
3489
return
2385
3490
2386
3491
# Store client before exiting. Secrets are encrypted with key
2387
3492
# based on what config file has. If config file is
2388
3493
# removed/edited, old secret will thus be unrecovable.
2389
3494
clients = {}
2390
3495
with PGPEngine() as pgp:
2391
for client in tcp_server.clients.itervalues():
3496
for client in tcp_server.clients.values():
2392
3497
key = client_settings[client.name]["secret"]
2393
3498
client.encrypted_secret = pgp.encrypt(client.secret,
2394
3499
key)
2395
3500
client_dict = {}
2396
3501
2397
3502
# A list of attributes that can not be pickled
2398
3503
# + secret.
2399
exclude = set(("bus", "changedstate", "secret",
2400
"checker"))
2401
for name, typ in (inspect.getmembers
2402
(dbus.service.Object)):
3504
exclude = {"bus", "changedstate", "secret",
3505
"checker", "server_settings"}
3506
for name, typ in inspect.getmembers(dbus.service
3507
.Object):
2403
3508
exclude.add(name)
2404
3509
2405
3510
client_dict["encrypted_secret"] = (client
2406
3511
.encrypted_secret)
2407
3512
for attr in client.client_structure:
2408
3513
if attr not in exclude:
2409
3514
client_dict[attr] = getattr(client, attr)
2410
3515
2411
3516
clients[client.name] = client_dict
2412
3517
del client_settings[client.name]["secret"]
2413
3518
2414
3519
try:
2415
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2416
prefix="clients-",
2417
dir=os.path.dirname
2418
(stored_state_path))
2419
with os.fdopen(tempfd, "wb") as stored_state:
2420
pickle.dump((clients, client_settings), stored_state)
3520
with tempfile.NamedTemporaryFile(
3521
mode='wb',
3522
suffix=".pickle",
3523
prefix='clients-',
3524
dir=os.path.dirname(stored_state_path),
3525
delete=False) as stored_state:
3526
pickle.dump((clients, client_settings), stored_state,
3527
protocol=2)
3528
tempname = stored_state.name
2421
3529
os.rename(tempname, stored_state_path)
2422
3530
except (IOError, OSError) as e:
2423
logger.warning("Could not save persistent state: {0}"
2424
.format(e))
2425
3531
if not debug:
2426
3532
try:
2427
3533
os.remove(tempname)
2428
3534
except NameError:
2429
3535
pass
2430
if e.errno not in set((errno.ENOENT, errno.EACCES,
2431
errno.EEXIST)):
2432
raise e
2433
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
2434
3544
# Delete all clients, and settings from config
2435
3545
while tcp_server.clients:
2436
3546
name, client = tcp_server.clients.popitem()
2437
3547
if use_dbus:
2438
3548
client.remove_from_connection()
2439
# Don't signal anything except ClientRemoved
3549
# Don't signal the disabling
2440
3550
client.disable(quiet=True)
3551
# Emit D-Bus signal for removal
2441
3552
if use_dbus:
2442
# Emit D-Bus signal
2443
mandos_dbus_service.ClientRemoved(client
2444
.dbus_object_path,
2445
client.name)
3553
mandos_dbus_service.client_removed_signal(client)
2446
3554
client_settings.clear()
2447
3555
2448
3556
atexit.register(cleanup)
2449
2450
for client in tcp_server.clients.itervalues():
3557
3558
for client in tcp_server.clients.values():
2451
3559
if use_dbus:
2452
# Emit D-Bus signal
2453
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3560
# Emit D-Bus signal for adding
3561
mandos_dbus_service.client_added_signal(client)
2454
3562
# Need to initiate checking of clients
2455
3563
if client.enabled:
2456
3564
client.init_checker()
2457
3565
2458
3566
tcp_server.enable()
2459
3567
tcp_server.server_activate()
2460
3568
2461
3569
# Find out what port we got
2462
service.port = tcp_server.socket.getsockname()[1]
3570
if zeroconf:
3571
service.port = tcp_server.socket.getsockname()[1]
2463
3572
if use_ipv6:
2464
3573
logger.info("Now listening on address %r, port %d,"
2465
" flowinfo %d, scope_id %d"
2466
% tcp_server.socket.getsockname())
3574
" flowinfo %d, scope_id %d",
3575
*tcp_server.socket.getsockname())
2467
3576
else: # IPv4
2468
logger.info("Now listening on address %r, port %d"
2469
% tcp_server.socket.getsockname())
2470
2471
#service.interface = tcp_server.socket.getsockname()[3]
2472
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
2473
3582
try:
2474
# From the Avahi example code
2475
try:
2476
service.activate()
2477
except dbus.exceptions.DBusException as error:
2478
logger.critical("DBusException: %s", error)
2479
cleanup()
2480
sys.exit(1)
2481
# End of Avahi example code
2482
2483
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2484
lambda *args, **kwargs:
2485
(tcp_server.handle_request
2486
(*args[2:], **kwargs) or True))
2487
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
2488
3598
logger.debug("Starting main loop")
2489
3599
main_loop.run()
2490
3600
except AvahiError as error:
2491
logger.critical("AvahiError: %s", error)
3601
logger.critical("Avahi Error", exc_info=error)
2492
3602
cleanup()
2493
3603
sys.exit(1)
2494
3604
except KeyboardInterrupt:
2499
3609
# Must run before the D-Bus bus name gets deregistered
2500
3610
cleanup()
2501
3611
3612
2502
3613
if __name__ == '__main__':
2503
3614
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0