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- Committer: teddy at recompile
- Date: 2011-12-27 14:15:40 UTC
- mto: (237.7.109 trunk) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 290.
- Revision ID: teddy@recompile.se-20111227141540-ajrabf33q59jfa7t
Reorder TODO entries
- files added:
- DBUS-API
- debian/source
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
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# Everything else is
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# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
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# Copyright © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 Björn Påhlsson
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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#
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# Contact the authors at <mandos@fukt.bsnet.se>.
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# Contact the authors at <mandos@recompile.se>.
32
32
#
33
33
34
from __future__ import division, with_statement, absolute_import
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
35
36
36
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import SocketServer as socketserver
37
38
import socket
38
import optparse
39
import argparse
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import datetime
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import errno
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import gnutls.crypto
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import logging
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import logging.handlers
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import pwd
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from contextlib import closing
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import contextlib
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import struct
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import fcntl
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import functools
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import cPickle as pickle
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import multiprocessing
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import types
66
import binascii
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import tempfile
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68
63
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import dbus
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70
import dbus.service
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75
import ctypes.util
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import xml.dom.minidom
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import inspect
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import GnuPGInterface
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79
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try:
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81
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
78
85
except ImportError:
79
86
SO_BINDTODEVICE = None
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87
81
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version = "1.0.12"
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84
logger = logging.Logger(u'mandos')
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version = "1.4.1"
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stored_state_file = "clients.pickle"
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91
logger = logging.getLogger()
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syslogger = (logging.handlers.SysLogHandler
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
87
address = "/dev/log"))
88
syslogger.setFormatter(logging.Formatter
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(u'Mandos [%(process)d]: %(levelname)s:'
90
u' %(message)s'))
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logger.addHandler(syslogger)
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
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u' %(levelname)s:'
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u' %(message)s'))
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logger.addHandler(console)
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address = str("/dev/log")))
95
96
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
100
except (OSError, AttributeError):
101
def if_nametoindex(interface):
102
"Get an interface index the hard way, i.e. using fcntl()"
103
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
with contextlib.closing(socket.socket()) as s:
105
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
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ifreq[16:20])[0]
110
return interface_index
111
112
113
def initlogger(debug, level=logging.WARNING):
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"""init logger and add loglevel"""
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syslogger.setFormatter(logging.Formatter
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('Mandos [%(process)d]: %(levelname)s:'
118
' %(message)s'))
119
logger.addHandler(syslogger)
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121
if debug:
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console = logging.StreamHandler()
123
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
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' [%(process)d]:'
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' %(levelname)s:'
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' %(message)s'))
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logger.addHandler(console)
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logger.setLevel(level)
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130
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class PGPError(Exception):
132
"""Exception if encryption/decryption fails"""
133
pass
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class PGPEngine(object):
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"""A simple class for OpenPGP symmetric encryption & decryption"""
138
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
140
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
141
self.gnupg = GnuPGInterface.GnuPG()
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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',
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'--quiet'])
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147
def __enter__(self):
148
return self
149
150
def __exit__ (self, exc_type, exc_value, traceback):
151
self._cleanup()
152
return False
153
154
def __del__(self):
155
self._cleanup()
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157
def _cleanup(self):
158
if self.tempdir is not None:
159
# Delete contents of tempdir
160
for root, dirs, files in os.walk(self.tempdir,
161
topdown = False):
162
for filename in files:
163
os.remove(os.path.join(root, filename))
164
for dirname in dirs:
165
os.rmdir(os.path.join(root, dirname))
166
# Remove tempdir
167
os.rmdir(self.tempdir)
168
self.tempdir = None
169
170
def password_encode(self, password):
171
# Passphrase can not be empty and can not contain newlines or
172
# NUL bytes. So we prefix it and hex encode it.
173
return b"mandos" + binascii.hexlify(password)
174
175
def encrypt(self, data, password):
176
self.gnupg.passphrase = self.password_encode(password)
177
with open(os.devnull) as devnull:
178
try:
179
proc = self.gnupg.run(['--symmetric'],
180
create_fhs=['stdin', 'stdout'],
181
attach_fhs={'stderr': devnull})
182
with contextlib.closing(proc.handles['stdin']) as f:
183
f.write(data)
184
with contextlib.closing(proc.handles['stdout']) as f:
185
ciphertext = f.read()
186
proc.wait()
187
except IOError as e:
188
raise PGPError(e)
189
self.gnupg.passphrase = None
190
return ciphertext
191
192
def decrypt(self, data, password):
193
self.gnupg.passphrase = self.password_encode(password)
194
with open(os.devnull) as devnull:
195
try:
196
proc = self.gnupg.run(['--decrypt'],
197
create_fhs=['stdin', 'stdout'],
198
attach_fhs={'stderr': devnull})
199
with contextlib.closing(proc.handles['stdin'] ) as f:
200
f.write(data)
201
with contextlib.closing(proc.handles['stdout']) as f:
202
decrypted_plaintext = f.read()
203
proc.wait()
204
except IOError as e:
205
raise PGPError(e)
206
self.gnupg.passphrase = None
207
return decrypted_plaintext
208
209
98
210
99
211
class AvahiError(Exception):
100
212
def __init__(self, value, *args, **kwargs):
116
228
Attributes:
117
229
interface: integer; avahi.IF_UNSPEC or an interface index.
118
230
Used to optionally bind to the specified interface.
119
name: string; Example: u'Mandos'
120
type: string; Example: u'_mandos._tcp'.
231
name: string; Example: 'Mandos'
232
type: string; Example: '_mandos._tcp'.
121
233
See <http://www.dns-sd.org/ServiceTypes.html>
122
234
port: integer; what port to announce
123
235
TXT: list of strings; TXT record for the service
132
244
"""
133
245
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
134
246
servicetype = None, port = None, TXT = None,
135
domain = u"", host = u"", max_renames = 32768,
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domain = "", host = "", max_renames = 32768,
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protocol = avahi.PROTO_UNSPEC, bus = None):
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249
self.interface = interface
138
250
self.name = name
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259
self.group = None # our entry group
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self.server = None
149
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self.bus = bus
262
self.entry_group_state_changed_match = None
150
263
def rename(self):
151
264
"""Derived from the Avahi example code"""
152
265
if self.rename_count >= self.max_renames:
153
logger.critical(u"No suitable Zeroconf service name found"
154
u" after %i retries, exiting.",
266
logger.critical("No suitable Zeroconf service name found"
267
" after %i retries, exiting.",
155
268
self.rename_count)
156
raise AvahiServiceError(u"Too many renames")
157
self.name = self.server.GetAlternativeServiceName(self.name)
158
logger.info(u"Changing Zeroconf service name to %r ...",
159
unicode(self.name))
160
syslogger.setFormatter(logging.Formatter
161
(u'Mandos (%s) [%%(process)d]:'
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u' %%(levelname)s: %%(message)s'
163
% self.name))
269
raise AvahiServiceError("Too many renames")
270
self.name = unicode(self.server
271
.GetAlternativeServiceName(self.name))
272
logger.info("Changing Zeroconf service name to %r ...",
273
self.name)
164
274
self.remove()
165
self.add()
275
try:
276
self.add()
277
except dbus.exceptions.DBusException as error:
278
logger.critical("DBusException: %s", error)
279
self.cleanup()
280
os._exit(1)
166
281
self.rename_count += 1
167
282
def remove(self):
168
283
"""Derived from the Avahi example code"""
284
if self.entry_group_state_changed_match is not None:
285
self.entry_group_state_changed_match.remove()
286
self.entry_group_state_changed_match = None
169
287
if self.group is not None:
170
288
self.group.Reset()
171
289
def add(self):
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290
"""Derived from the Avahi example code"""
291
self.remove()
173
292
if self.group is None:
174
293
self.group = dbus.Interface(
175
294
self.bus.get_object(avahi.DBUS_NAME,
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295
self.server.EntryGroupNew()),
177
296
avahi.DBUS_INTERFACE_ENTRY_GROUP)
178
self.group.connect_to_signal('StateChanged',
179
self
180
.entry_group_state_changed)
181
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
297
self.entry_group_state_changed_match = (
298
self.group.connect_to_signal(
299
'StateChanged', self.entry_group_state_changed))
300
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
182
301
self.name, self.type)
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self.group.AddService(
184
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self.interface,
191
310
self.group.Commit()
192
311
def entry_group_state_changed(self, state, error):
193
312
"""Derived from the Avahi example code"""
194
logger.debug(u"Avahi state change: %i", state)
313
logger.debug("Avahi entry group state change: %i", state)
195
314
196
315
if state == avahi.ENTRY_GROUP_ESTABLISHED:
197
logger.debug(u"Zeroconf service established.")
316
logger.debug("Zeroconf service established.")
198
317
elif state == avahi.ENTRY_GROUP_COLLISION:
199
logger.warning(u"Zeroconf service name collision.")
318
logger.info("Zeroconf service name collision.")
200
319
self.rename()
201
320
elif state == avahi.ENTRY_GROUP_FAILURE:
202
logger.critical(u"Avahi: Error in group state changed %s",
321
logger.critical("Avahi: Error in group state changed %s",
203
322
unicode(error))
204
raise AvahiGroupError(u"State changed: %s"
323
raise AvahiGroupError("State changed: %s"
205
324
% unicode(error))
206
325
def cleanup(self):
207
326
"""Derived from the Avahi example code"""
208
327
if self.group is not None:
209
self.group.Free()
328
try:
329
self.group.Free()
330
except (dbus.exceptions.UnknownMethodException,
331
dbus.exceptions.DBusException):
332
pass
210
333
self.group = None
211
def server_state_changed(self, state):
334
self.remove()
335
def server_state_changed(self, state, error=None):
212
336
"""Derived from the Avahi example code"""
213
if state == avahi.SERVER_COLLISION:
214
logger.error(u"Zeroconf server name collision")
215
self.remove()
337
logger.debug("Avahi server state change: %i", state)
338
bad_states = { avahi.SERVER_INVALID:
339
"Zeroconf server invalid",
340
avahi.SERVER_REGISTERING: None,
341
avahi.SERVER_COLLISION:
342
"Zeroconf server name collision",
343
avahi.SERVER_FAILURE:
344
"Zeroconf server failure" }
345
if state in bad_states:
346
if bad_states[state] is not None:
347
if error is None:
348
logger.error(bad_states[state])
349
else:
350
logger.error(bad_states[state] + ": %r", error)
351
self.cleanup()
216
352
elif state == avahi.SERVER_RUNNING:
217
353
self.add()
354
else:
355
if error is None:
356
logger.debug("Unknown state: %r", state)
357
else:
358
logger.debug("Unknown state: %r: %r", state, error)
218
359
def activate(self):
219
360
"""Derived from the Avahi example code"""
220
361
if self.server is None:
221
362
self.server = dbus.Interface(
222
363
self.bus.get_object(avahi.DBUS_NAME,
223
avahi.DBUS_PATH_SERVER),
364
avahi.DBUS_PATH_SERVER,
365
follow_name_owner_changes=True),
224
366
avahi.DBUS_INTERFACE_SERVER)
225
self.server.connect_to_signal(u"StateChanged",
367
self.server.connect_to_signal("StateChanged",
226
368
self.server_state_changed)
227
369
self.server_state_changed(self.server.GetState())
228
370
371
class AvahiServiceToSyslog(AvahiService):
372
def rename(self):
373
"""Add the new name to the syslog messages"""
374
ret = AvahiService.rename(self)
375
syslogger.setFormatter(logging.Formatter
376
('Mandos (%s) [%%(process)d]:'
377
' %%(levelname)s: %%(message)s'
378
% self.name))
379
return ret
229
380
381
def timedelta_to_milliseconds(td):
382
"Convert a datetime.timedelta() to milliseconds"
383
return ((td.days * 24 * 60 * 60 * 1000)
384
+ (td.seconds * 1000)
385
+ (td.microseconds // 1000))
386
230
387
class Client(object):
231
388
"""A representation of a client host served by this server.
232
389
233
390
Attributes:
234
name: string; from the config file, used in log messages and
235
D-Bus identifiers
236
fingerprint: string (40 or 32 hexadecimal digits); used to
237
uniquely identify the client
238
secret: bytestring; sent verbatim (over TLS) to client
239
host: string; available for use by the checker command
240
created: datetime.datetime(); (UTC) object creation
241
last_enabled: datetime.datetime(); (UTC)
242
enabled: bool()
243
last_checked_ok: datetime.datetime(); (UTC) or None
244
timeout: datetime.timedelta(); How long from last_checked_ok
245
until this client is invalid
246
interval: datetime.timedelta(); How often to start a new checker
247
disable_hook: If set, called by disable() as disable_hook(self)
391
approved: bool(); 'None' if not yet approved/disapproved
392
approval_delay: datetime.timedelta(); Time to wait for approval
393
approval_duration: datetime.timedelta(); Duration of one approval
248
394
checker: subprocess.Popen(); a running checker process used
249
395
to see if the client lives.
250
396
'None' if no process is running.
251
checker_initiator_tag: a gobject event source tag, or None
252
disable_initiator_tag: - '' -
253
checker_callback_tag: - '' -
254
checker_command: string; External command which is run to check if
255
client lives. %() expansions are done at
397
checker_callback_tag: a gobject event source tag, or None
398
checker_command: string; External command which is run to check
399
if client lives. %() expansions are done at
256
400
runtime with vars(self) as dict, so that for
257
401
instance %(name)s can be used in the command.
402
checker_initiator_tag: a gobject event source tag, or None
403
created: datetime.datetime(); (UTC) object creation
404
client_structure: Object describing what attributes a client has
405
and is used for storing the client at exit
258
406
current_checker_command: string; current running checker_command
407
disable_initiator_tag: a gobject event source tag, or None
408
enabled: bool()
409
fingerprint: string (40 or 32 hexadecimal digits); used to
410
uniquely identify the client
411
host: string; available for use by the checker command
412
interval: datetime.timedelta(); How often to start a new checker
413
last_approval_request: datetime.datetime(); (UTC) or None
414
last_checked_ok: datetime.datetime(); (UTC) or None
415
last_checker_status: integer between 0 and 255 reflecting exit
416
status of last checker. -1 reflects crashed
417
checker, or None.
418
last_enabled: datetime.datetime(); (UTC) or None
419
name: string; from the config file, used in log messages and
420
D-Bus identifiers
421
secret: bytestring; sent verbatim (over TLS) to client
422
timeout: datetime.timedelta(); How long from last_checked_ok
423
until this client is disabled
424
extended_timeout: extra long timeout when password has been sent
425
runtime_expansions: Allowed attributes for runtime expansion.
426
expires: datetime.datetime(); time (UTC) when a client will be
427
disabled, or None
259
428
"""
260
429
261
@staticmethod
262
def _timedelta_to_milliseconds(td):
263
"Convert a datetime.timedelta() to milliseconds"
264
return ((td.days * 24 * 60 * 60 * 1000)
265
+ (td.seconds * 1000)
266
+ (td.microseconds // 1000))
430
runtime_expansions = ("approval_delay", "approval_duration",
431
"created", "enabled", "fingerprint",
432
"host", "interval", "last_checked_ok",
433
"last_enabled", "name", "timeout")
434
client_defaults = { "timeout": "5m",
435
"extended_timeout": "15m",
436
"interval": "2m",
437
"checker": "fping -q -- %%(host)s",
438
"host": "",
439
"approval_delay": "0s",
440
"approval_duration": "1s",
441
"approved_by_default": "True",
442
"enabled": "True",
443
}
267
444
268
445
def timeout_milliseconds(self):
269
446
"Return the 'timeout' attribute in milliseconds"
270
return self._timedelta_to_milliseconds(self.timeout)
447
return timedelta_to_milliseconds(self.timeout)
448
449
def extended_timeout_milliseconds(self):
450
"Return the 'extended_timeout' attribute in milliseconds"
451
return timedelta_to_milliseconds(self.extended_timeout)
271
452
272
453
def interval_milliseconds(self):
273
454
"Return the 'interval' attribute in milliseconds"
274
return self._timedelta_to_milliseconds(self.interval)
455
return timedelta_to_milliseconds(self.interval)
275
456
276
def __init__(self, name = None, disable_hook=None, config=None):
457
def approval_delay_milliseconds(self):
458
return timedelta_to_milliseconds(self.approval_delay)
459
460
@staticmethod
461
def config_parser(config):
462
""" Construct a new dict of client settings of this form:
463
{ client_name: {setting_name: value, ...}, ...}
464
with exceptions for any special settings as defined above"""
465
settings = {}
466
for client_name in config.sections():
467
section = dict(config.items(client_name))
468
client = settings[client_name] = {}
469
470
client["host"] = section["host"]
471
# Reformat values from string types to Python types
472
client["approved_by_default"] = config.getboolean(
473
client_name, "approved_by_default")
474
client["enabled"] = config.getboolean(client_name, "enabled")
475
476
client["fingerprint"] = (section["fingerprint"].upper()
477
.replace(" ", ""))
478
if "secret" in section:
479
client["secret"] = section["secret"].decode("base64")
480
elif "secfile" in section:
481
with open(os.path.expanduser(os.path.expandvars
482
(section["secfile"])),
483
"rb") as secfile:
484
client["secret"] = secfile.read()
485
else:
486
raise TypeError("No secret or secfile for section %s"
487
% section)
488
client["timeout"] = string_to_delta(section["timeout"])
489
client["extended_timeout"] = string_to_delta(
490
section["extended_timeout"])
491
client["interval"] = string_to_delta(section["interval"])
492
client["approval_delay"] = string_to_delta(
493
section["approval_delay"])
494
client["approval_duration"] = string_to_delta(
495
section["approval_duration"])
496
client["checker_command"] = section["checker"]
497
client["last_approval_request"] = None
498
client["last_checked_ok"] = None
499
client["last_checker_status"] = None
500
if client["enabled"]:
501
client["last_enabled"] = datetime.datetime.utcnow()
502
client["expires"] = (datetime.datetime.utcnow()
503
+ client["timeout"])
504
else:
505
client["last_enabled"] = None
506
client["expires"] = None
507
508
return settings
509
510
511
def __init__(self, settings, name = None):
277
512
"""Note: the 'checker' key in 'config' sets the
278
513
'checker_command' attribute and *not* the 'checker'
279
514
attribute."""
280
515
self.name = name
281
if config is None:
282
config = {}
283
logger.debug(u"Creating client %r", self.name)
516
# adding all client settings
517
for setting, value in settings.iteritems():
518
setattr(self, setting, value)
519
520
logger.debug("Creating client %r", self.name)
284
521
# Uppercase and remove spaces from fingerprint for later
285
522
# comparison purposes with return value from the fingerprint()
286
523
# function
287
self.fingerprint = (config[u"fingerprint"].upper()
288
.replace(u" ", u""))
289
logger.debug(u" Fingerprint: %s", self.fingerprint)
290
if u"secret" in config:
291
self.secret = config[u"secret"].decode(u"base64")
292
elif u"secfile" in config:
293
with closing(open(os.path.expanduser
294
(os.path.expandvars
295
(config[u"secfile"])))) as secfile:
296
self.secret = secfile.read()
297
else:
298
raise TypeError(u"No secret or secfile for client %s"
299
% self.name)
300
self.host = config.get(u"host", u"")
301
self.created = datetime.datetime.utcnow()
302
self.enabled = False
303
self.last_enabled = None
304
self.last_checked_ok = None
305
self.timeout = string_to_delta(config[u"timeout"])
306
self.interval = string_to_delta(config[u"interval"])
307
self.disable_hook = disable_hook
524
logger.debug(" Fingerprint: %s", self.fingerprint)
525
self.created = settings.get("created", datetime.datetime.utcnow())
526
527
# attributes specific for this server instance
308
528
self.checker = None
309
529
self.checker_initiator_tag = None
310
530
self.disable_initiator_tag = None
311
531
self.checker_callback_tag = None
312
self.checker_command = config[u"checker"]
313
532
self.current_checker_command = None
314
self.last_connect = None
533
self.approved = None
534
self.approvals_pending = 0
535
self.changedstate = (multiprocessing_manager
536
.Condition(multiprocessing_manager
537
.Lock()))
538
self.client_structure = [attr for attr in
539
self.__dict__.iterkeys()
540
if not attr.startswith("_")]
541
self.client_structure.append("client_structure")
542
543
for name, t in inspect.getmembers(type(self),
544
lambda obj:
545
isinstance(obj,
546
property)):
547
if not name.startswith("_"):
548
self.client_structure.append(name)
549
550
# Send notice to process children that client state has changed
551
def send_changedstate(self):
552
with self.changedstate:
553
self.changedstate.notify_all()
315
554
316
555
def enable(self):
317
556
"""Start this client's checker and timeout hooks"""
318
if getattr(self, u"enabled", False):
557
if getattr(self, "enabled", False):
319
558
# Already enabled
320
559
return
560
self.send_changedstate()
561
self.expires = datetime.datetime.utcnow() + self.timeout
562
self.enabled = True
321
563
self.last_enabled = datetime.datetime.utcnow()
564
self.init_checker()
565
566
def disable(self, quiet=True):
567
"""Disable this client."""
568
if not getattr(self, "enabled", False):
569
return False
570
if not quiet:
571
self.send_changedstate()
572
if not quiet:
573
logger.info("Disabling client %s", self.name)
574
if getattr(self, "disable_initiator_tag", False):
575
gobject.source_remove(self.disable_initiator_tag)
576
self.disable_initiator_tag = None
577
self.expires = None
578
if getattr(self, "checker_initiator_tag", False):
579
gobject.source_remove(self.checker_initiator_tag)
580
self.checker_initiator_tag = None
581
self.stop_checker()
582
self.enabled = False
583
# Do not run this again if called by a gobject.timeout_add
584
return False
585
586
def __del__(self):
587
self.disable()
588
589
def init_checker(self):
322
590
# Schedule a new checker to be started an 'interval' from now,
323
591
# and every interval from then on.
324
592
self.checker_initiator_tag = (gobject.timeout_add
325
593
(self.interval_milliseconds(),
326
594
self.start_checker))
327
# Also start a new checker *right now*.
328
self.start_checker()
329
595
# Schedule a disable() when 'timeout' has passed
330
596
self.disable_initiator_tag = (gobject.timeout_add
331
597
(self.timeout_milliseconds(),
332
598
self.disable))
333
self.enabled = True
334
335
def disable(self):
336
"""Disable this client."""
337
if not getattr(self, "enabled", False):
338
return False
339
logger.info(u"Disabling client %s", self.name)
340
if getattr(self, u"disable_initiator_tag", False):
341
gobject.source_remove(self.disable_initiator_tag)
342
self.disable_initiator_tag = None
343
if getattr(self, u"checker_initiator_tag", False):
344
gobject.source_remove(self.checker_initiator_tag)
345
self.checker_initiator_tag = None
346
self.stop_checker()
347
if self.disable_hook:
348
self.disable_hook(self)
349
self.enabled = False
350
# Do not run this again if called by a gobject.timeout_add
351
return False
352
353
def __del__(self):
354
self.disable_hook = None
355
self.disable()
599
# Also start a new checker *right now*.
600
self.start_checker()
356
601
357
602
def checker_callback(self, pid, condition, command):
358
603
"""The checker has completed, so take appropriate actions."""
359
604
self.checker_callback_tag = None
360
605
self.checker = None
361
606
if os.WIFEXITED(condition):
362
exitstatus = os.WEXITSTATUS(condition)
363
if exitstatus == 0:
364
logger.info(u"Checker for %(name)s succeeded",
607
self.last_checker_status = os.WEXITSTATUS(condition)
608
if self.last_checker_status == 0:
609
logger.info("Checker for %(name)s succeeded",
365
610
vars(self))
366
611
self.checked_ok()
367
612
else:
368
logger.info(u"Checker for %(name)s failed",
613
logger.info("Checker for %(name)s failed",
369
614
vars(self))
370
615
else:
371
logger.warning(u"Checker for %(name)s crashed?",
616
self.last_checker_status = -1
617
logger.warning("Checker for %(name)s crashed?",
372
618
vars(self))
373
619
374
def checked_ok(self):
620
def checked_ok(self, timeout=None):
375
621
"""Bump up the timeout for this client.
376
622
377
623
This should only be called when the client has been seen,
378
624
alive and well.
379
625
"""
626
if timeout is None:
627
timeout = self.timeout
380
628
self.last_checked_ok = datetime.datetime.utcnow()
381
gobject.source_remove(self.disable_initiator_tag)
382
self.disable_initiator_tag = (gobject.timeout_add
383
(self.timeout_milliseconds(),
384
self.disable))
629
if self.disable_initiator_tag is not None:
630
gobject.source_remove(self.disable_initiator_tag)
631
if getattr(self, "enabled", False):
632
self.disable_initiator_tag = (gobject.timeout_add
633
(timedelta_to_milliseconds
634
(timeout), self.disable))
635
self.expires = datetime.datetime.utcnow() + timeout
636
637
def need_approval(self):
638
self.last_approval_request = datetime.datetime.utcnow()
385
639
386
640
def start_checker(self):
387
641
"""Start a new checker subprocess if one is not running.
394
648
# client would inevitably timeout, since no checker would get
395
649
# a chance to run to completion. If we instead leave running
396
650
# checkers alone, the checker would have to take more time
397
# than 'timeout' for the client to be declared invalid, which
398
# is as it should be.
651
# than 'timeout' for the client to be disabled, which is as it
652
# should be.
399
653
400
654
# If a checker exists, make sure it is not a zombie
401
if self.checker is not None:
655
try:
402
656
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
657
except (AttributeError, OSError) as error:
658
if (isinstance(error, OSError)
659
and error.errno != errno.ECHILD):
660
raise error
661
else:
403
662
if pid:
404
logger.warning(u"Checker was a zombie")
663
logger.warning("Checker was a zombie")
405
664
gobject.source_remove(self.checker_callback_tag)
406
665
self.checker_callback(pid, status,
407
666
self.current_checker_command)
412
671
command = self.checker_command % self.host
413
672
except TypeError:
414
673
# Escape attributes for the shell
415
escaped_attrs = dict((key,
416
re.escape(unicode(str(val),
417
errors=
418
u'replace')))
419
for key, val in
420
vars(self).iteritems())
674
escaped_attrs = dict(
675
(attr,
676
re.escape(unicode(str(getattr(self, attr, "")),
677
errors=
678
'replace')))
679
for attr in
680
self.runtime_expansions)
681
421
682
try:
422
683
command = self.checker_command % escaped_attrs
423
except TypeError, error:
424
logger.error(u'Could not format string "%s":'
425
u' %s', self.checker_command, error)
684
except TypeError as error:
685
logger.error('Could not format string "%s":'
686
' %s', self.checker_command, error)
426
687
return True # Try again later
427
688
self.current_checker_command = command
428
689
try:
429
logger.info(u"Starting checker %r for %s",
690
logger.info("Starting checker %r for %s",
430
691
command, self.name)
431
692
# We don't need to redirect stdout and stderr, since
432
693
# in normal mode, that is already done by daemon(),
434
695
# always replaced by /dev/null.)
435
696
self.checker = subprocess.Popen(command,
436
697
close_fds=True,
437
shell=True, cwd=u"/")
698
shell=True, cwd="/")
438
699
self.checker_callback_tag = (gobject.child_watch_add
439
700
(self.checker.pid,
440
701
self.checker_callback,
445
706
if pid:
446
707
gobject.source_remove(self.checker_callback_tag)
447
708
self.checker_callback(pid, status, command)
448
except OSError, error:
449
logger.error(u"Failed to start subprocess: %s",
709
except OSError as error:
710
logger.error("Failed to start subprocess: %s",
450
711
error)
451
712
# Re-run this periodically if run by gobject.timeout_add
452
713
return True
456
717
if self.checker_callback_tag:
457
718
gobject.source_remove(self.checker_callback_tag)
458
719
self.checker_callback_tag = None
459
if getattr(self, u"checker", None) is None:
720
if getattr(self, "checker", None) is None:
460
721
return
461
logger.debug(u"Stopping checker for %(name)s", vars(self))
722
logger.debug("Stopping checker for %(name)s", vars(self))
462
723
try:
463
724
os.kill(self.checker.pid, signal.SIGTERM)
464
#os.sleep(0.5)
725
#time.sleep(0.5)
465
726
#if self.checker.poll() is None:
466
727
# os.kill(self.checker.pid, signal.SIGKILL)
467
except OSError, error:
728
except OSError as error:
468
729
if error.errno != errno.ESRCH: # No such process
469
730
raise
470
731
self.checker = None
471
472
def still_valid(self):
473
"""Has the timeout not yet passed for this client?"""
474
if not getattr(self, u"enabled", False):
475
return False
476
now = datetime.datetime.utcnow()
477
if self.last_checked_ok is None:
478
return now < (self.created + self.timeout)
479
else:
480
return now < (self.last_checked_ok + self.timeout)
481
482
483
def dbus_service_property(dbus_interface, signature=u"v",
484
access=u"readwrite", byte_arrays=False):
732
733
734
def dbus_service_property(dbus_interface, signature="v",
735
access="readwrite", byte_arrays=False):
485
736
"""Decorators for marking methods of a DBusObjectWithProperties to
486
737
become properties on the D-Bus.
487
738
492
743
dbus.service.method, except there is only "signature", since the
493
744
type from Get() and the type sent to Set() is the same.
494
745
"""
746
# Encoding deeply encoded byte arrays is not supported yet by the
747
# "Set" method, so we fail early here:
748
if byte_arrays and signature != "ay":
749
raise ValueError("Byte arrays not supported for non-'ay'"
750
" signature %r" % signature)
495
751
def decorator(func):
496
752
func._dbus_is_property = True
497
753
func._dbus_interface = dbus_interface
498
754
func._dbus_signature = signature
499
755
func._dbus_access = access
500
756
func._dbus_name = func.__name__
501
if func._dbus_name.endswith(u"_dbus_property"):
757
if func._dbus_name.endswith("_dbus_property"):
502
758
func._dbus_name = func._dbus_name[:-14]
503
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
759
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
504
760
return func
505
761
return decorator
506
762
526
782
527
783
class DBusObjectWithProperties(dbus.service.Object):
528
784
"""A D-Bus object with properties.
529
785
530
786
Classes inheriting from this can use the dbus_service_property
531
787
decorator to expose methods as D-Bus properties. It exposes the
532
788
standard Get(), Set(), and GetAll() methods on the D-Bus.
534
790
535
791
@staticmethod
536
792
def _is_dbus_property(obj):
537
return getattr(obj, u"_dbus_is_property", False)
793
return getattr(obj, "_dbus_is_property", False)
538
794
539
795
def _get_all_dbus_properties(self):
540
796
"""Returns a generator of (name, attribute) pairs
541
797
"""
542
return ((prop._dbus_name, prop)
798
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
799
for cls in self.__class__.__mro__
543
800
for name, prop in
544
inspect.getmembers(self, self._is_dbus_property))
801
inspect.getmembers(cls, self._is_dbus_property))
545
802
546
803
def _get_dbus_property(self, interface_name, property_name):
547
804
"""Returns a bound method if one exists which is a D-Bus
548
805
property with the specified name and interface.
549
806
"""
550
for name in (property_name,
551
property_name + u"_dbus_property"):
552
prop = getattr(self, name, None)
553
if (prop is None
554
or not self._is_dbus_property(prop)
555
or prop._dbus_name != property_name
556
or (interface_name and prop._dbus_interface
557
and interface_name != prop._dbus_interface)):
558
continue
559
return prop
807
for cls in self.__class__.__mro__:
808
for name, value in (inspect.getmembers
809
(cls, self._is_dbus_property)):
810
if (value._dbus_name == property_name
811
and value._dbus_interface == interface_name):
812
return value.__get__(self)
813
560
814
# No such property
561
raise DBusPropertyNotFound(self.dbus_object_path + u":"
562
+ interface_name + u"."
815
raise DBusPropertyNotFound(self.dbus_object_path + ":"
816
+ interface_name + "."
563
817
+ property_name)
564
818
565
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
566
out_signature=u"v")
819
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
820
out_signature="v")
567
821
def Get(self, interface_name, property_name):
568
822
"""Standard D-Bus property Get() method, see D-Bus standard.
569
823
"""
570
824
prop = self._get_dbus_property(interface_name, property_name)
571
if prop._dbus_access == u"write":
825
if prop._dbus_access == "write":
572
826
raise DBusPropertyAccessException(property_name)
573
827
value = prop()
574
if not hasattr(value, u"variant_level"):
828
if not hasattr(value, "variant_level"):
575
829
return value
576
830
return type(value)(value, variant_level=value.variant_level+1)
577
831
578
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
832
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
579
833
def Set(self, interface_name, property_name, value):
580
834
"""Standard D-Bus property Set() method, see D-Bus standard.
581
835
"""
582
836
prop = self._get_dbus_property(interface_name, property_name)
583
if prop._dbus_access == u"read":
837
if prop._dbus_access == "read":
584
838
raise DBusPropertyAccessException(property_name)
585
if prop._dbus_get_args_options[u"byte_arrays"]:
839
if prop._dbus_get_args_options["byte_arrays"]:
840
# The byte_arrays option is not supported yet on
841
# signatures other than "ay".
842
if prop._dbus_signature != "ay":
843
raise ValueError
586
844
value = dbus.ByteArray(''.join(unichr(byte)
587
845
for byte in value))
588
846
prop(value)
589
847
590
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
591
out_signature=u"a{sv}")
848
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
849
out_signature="a{sv}")
592
850
def GetAll(self, interface_name):
593
851
"""Standard D-Bus property GetAll() method, see D-Bus
594
852
standard.
595
853
596
854
Note: Will not include properties with access="write".
597
855
"""
598
all = {}
856
properties = {}
599
857
for name, prop in self._get_all_dbus_properties():
600
858
if (interface_name
601
859
and interface_name != prop._dbus_interface):
602
860
# Interface non-empty but did not match
603
861
continue
604
862
# Ignore write-only properties
605
if prop._dbus_access == u"write":
863
if prop._dbus_access == "write":
606
864
continue
607
865
value = prop()
608
if not hasattr(value, u"variant_level"):
609
all[name] = value
866
if not hasattr(value, "variant_level"):
867
properties[name] = value
610
868
continue
611
all[name] = type(value)(value, variant_level=
612
value.variant_level+1)
613
return dbus.Dictionary(all, signature=u"sv")
869
properties[name] = type(value)(value, variant_level=
870
value.variant_level+1)
871
return dbus.Dictionary(properties, signature="sv")
614
872
615
873
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
616
out_signature=u"s",
874
out_signature="s",
617
875
path_keyword='object_path',
618
876
connection_keyword='connection')
619
877
def Introspect(self, object_path, connection):
620
878
"""Standard D-Bus method, overloaded to insert property tags.
621
879
"""
622
880
xmlstring = dbus.service.Object.Introspect(self, object_path,
623
connection)
624
document = xml.dom.minidom.parseString(xmlstring)
625
del xmlstring
626
def make_tag(document, name, prop):
627
e = document.createElement(u"property")
628
e.setAttribute(u"name", name)
629
e.setAttribute(u"type", prop._dbus_signature)
630
e.setAttribute(u"access", prop._dbus_access)
631
return e
632
for if_tag in document.getElementsByTagName(u"interface"):
633
for tag in (make_tag(document, name, prop)
634
for name, prop
635
in self._get_all_dbus_properties()
636
if prop._dbus_interface
637
== if_tag.getAttribute(u"name")):
638
if_tag.appendChild(tag)
639
xmlstring = document.toxml(u"utf-8")
640
document.unlink()
881
connection)
882
try:
883
document = xml.dom.minidom.parseString(xmlstring)
884
def make_tag(document, name, prop):
885
e = document.createElement("property")
886
e.setAttribute("name", name)
887
e.setAttribute("type", prop._dbus_signature)
888
e.setAttribute("access", prop._dbus_access)
889
return e
890
for if_tag in document.getElementsByTagName("interface"):
891
for tag in (make_tag(document, name, prop)
892
for name, prop
893
in self._get_all_dbus_properties()
894
if prop._dbus_interface
895
== if_tag.getAttribute("name")):
896
if_tag.appendChild(tag)
897
# Add the names to the return values for the
898
# "org.freedesktop.DBus.Properties" methods
899
if (if_tag.getAttribute("name")
900
== "org.freedesktop.DBus.Properties"):
901
for cn in if_tag.getElementsByTagName("method"):
902
if cn.getAttribute("name") == "Get":
903
for arg in cn.getElementsByTagName("arg"):
904
if (arg.getAttribute("direction")
905
== "out"):
906
arg.setAttribute("name", "value")
907
elif cn.getAttribute("name") == "GetAll":
908
for arg in cn.getElementsByTagName("arg"):
909
if (arg.getAttribute("direction")
910
== "out"):
911
arg.setAttribute("name", "props")
912
xmlstring = document.toxml("utf-8")
913
document.unlink()
914
except (AttributeError, xml.dom.DOMException,
915
xml.parsers.expat.ExpatError) as error:
916
logger.error("Failed to override Introspection method",
917
error)
641
918
return xmlstring
642
919
643
920
921
def datetime_to_dbus (dt, variant_level=0):
922
"""Convert a UTC datetime.datetime() to a D-Bus type."""
923
if dt is None:
924
return dbus.String("", variant_level = variant_level)
925
return dbus.String(dt.isoformat(),
926
variant_level=variant_level)
927
928
929
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
930
.__metaclass__):
931
"""Applied to an empty subclass of a D-Bus object, this metaclass
932
will add additional D-Bus attributes matching a certain pattern.
933
"""
934
def __new__(mcs, name, bases, attr):
935
# Go through all the base classes which could have D-Bus
936
# methods, signals, or properties in them
937
for base in (b for b in bases
938
if issubclass(b, dbus.service.Object)):
939
# Go though all attributes of the base class
940
for attrname, attribute in inspect.getmembers(base):
941
# Ignore non-D-Bus attributes, and D-Bus attributes
942
# with the wrong interface name
943
if (not hasattr(attribute, "_dbus_interface")
944
or not attribute._dbus_interface
945
.startswith("se.recompile.Mandos")):
946
continue
947
# Create an alternate D-Bus interface name based on
948
# the current name
949
alt_interface = (attribute._dbus_interface
950
.replace("se.recompile.Mandos",
951
"se.bsnet.fukt.Mandos"))
952
# Is this a D-Bus signal?
953
if getattr(attribute, "_dbus_is_signal", False):
954
# Extract the original non-method function by
955
# black magic
956
nonmethod_func = (dict(
957
zip(attribute.func_code.co_freevars,
958
attribute.__closure__))["func"]
959
.cell_contents)
960
# Create a new, but exactly alike, function
961
# object, and decorate it to be a new D-Bus signal
962
# with the alternate D-Bus interface name
963
new_function = (dbus.service.signal
964
(alt_interface,
965
attribute._dbus_signature)
966
(types.FunctionType(
967
nonmethod_func.func_code,
968
nonmethod_func.func_globals,
969
nonmethod_func.func_name,
970
nonmethod_func.func_defaults,
971
nonmethod_func.func_closure)))
972
# Define a creator of a function to call both the
973
# old and new functions, so both the old and new
974
# signals gets sent when the function is called
975
def fixscope(func1, func2):
976
"""This function is a scope container to pass
977
func1 and func2 to the "call_both" function
978
outside of its arguments"""
979
def call_both(*args, **kwargs):
980
"""This function will emit two D-Bus
981
signals by calling func1 and func2"""
982
func1(*args, **kwargs)
983
func2(*args, **kwargs)
984
return call_both
985
# Create the "call_both" function and add it to
986
# the class
987
attr[attrname] = fixscope(attribute,
988
new_function)
989
# Is this a D-Bus method?
990
elif getattr(attribute, "_dbus_is_method", False):
991
# Create a new, but exactly alike, function
992
# object. Decorate it to be a new D-Bus method
993
# with the alternate D-Bus interface name. Add it
994
# to the class.
995
attr[attrname] = (dbus.service.method
996
(alt_interface,
997
attribute._dbus_in_signature,
998
attribute._dbus_out_signature)
999
(types.FunctionType
1000
(attribute.func_code,
1001
attribute.func_globals,
1002
attribute.func_name,
1003
attribute.func_defaults,
1004
attribute.func_closure)))
1005
# Is this a D-Bus property?
1006
elif getattr(attribute, "_dbus_is_property", False):
1007
# Create a new, but exactly alike, function
1008
# object, and decorate it to be a new D-Bus
1009
# property with the alternate D-Bus interface
1010
# name. Add it to the class.
1011
attr[attrname] = (dbus_service_property
1012
(alt_interface,
1013
attribute._dbus_signature,
1014
attribute._dbus_access,
1015
attribute
1016
._dbus_get_args_options
1017
["byte_arrays"])
1018
(types.FunctionType
1019
(attribute.func_code,
1020
attribute.func_globals,
1021
attribute.func_name,
1022
attribute.func_defaults,
1023
attribute.func_closure)))
1024
return type.__new__(mcs, name, bases, attr)
1025
1026
644
1027
class ClientDBus(Client, DBusObjectWithProperties):
645
1028
"""A Client class using D-Bus
646
1029
648
1031
dbus_object_path: dbus.ObjectPath
649
1032
bus: dbus.SystemBus()
650
1033
"""
1034
1035
runtime_expansions = (Client.runtime_expansions
1036
+ ("dbus_object_path",))
1037
651
1038
# dbus.service.Object doesn't use super(), so we can't either.
652
1039
653
1040
def __init__(self, bus = None, *args, **kwargs):
654
1041
self.bus = bus
655
1042
Client.__init__(self, *args, **kwargs)
1043
self._approvals_pending = 0
1044
1045
self._approvals_pending = 0
656
1046
# Only now, when this client is initialized, can it show up on
657
1047
# the D-Bus
1048
client_object_name = unicode(self.name).translate(
1049
{ord("."): ord("_"),
1050
ord("-"): ord("_")})
658
1051
self.dbus_object_path = (dbus.ObjectPath
659
(u"/clients/"
660
+ self.name.replace(u".", u"_")))
1052
("/clients/" + client_object_name))
661
1053
DBusObjectWithProperties.__init__(self, self.bus,
662
1054
self.dbus_object_path)
663
664
@staticmethod
665
def _datetime_to_dbus(dt, variant_level=0):
666
"""Convert a UTC datetime.datetime() to a D-Bus type."""
667
return dbus.String(dt.isoformat(),
668
variant_level=variant_level)
669
670
def enable(self):
671
oldstate = getattr(self, u"enabled", False)
672
r = Client.enable(self)
673
if oldstate != self.enabled:
674
# Emit D-Bus signals
675
self.PropertyChanged(dbus.String(u"enabled"),
676
dbus.Boolean(True, variant_level=1))
677
self.PropertyChanged(
678
dbus.String(u"last_enabled"),
679
self._datetime_to_dbus(self.last_enabled,
680
variant_level=1))
681
return r
682
683
def disable(self, signal = True):
684
oldstate = getattr(self, u"enabled", False)
685
r = Client.disable(self)
686
if signal and oldstate != self.enabled:
687
# Emit D-Bus signal
688
self.PropertyChanged(dbus.String(u"enabled"),
689
dbus.Boolean(False, variant_level=1))
690
return r
1055
1056
def notifychangeproperty(transform_func,
1057
dbus_name, type_func=lambda x: x,
1058
variant_level=1):
1059
""" Modify a variable so that it's a property which announces
1060
its changes to DBus.
1061
1062
transform_fun: Function that takes a value and a variant_level
1063
and transforms it to a D-Bus type.
1064
dbus_name: D-Bus name of the variable
1065
type_func: Function that transform the value before sending it
1066
to the D-Bus. Default: no transform
1067
variant_level: D-Bus variant level. Default: 1
1068
"""
1069
attrname = "_{0}".format(dbus_name)
1070
def setter(self, value):
1071
if hasattr(self, "dbus_object_path"):
1072
if (not hasattr(self, attrname) or
1073
type_func(getattr(self, attrname, None))
1074
!= type_func(value)):
1075
dbus_value = transform_func(type_func(value),
1076
variant_level
1077
=variant_level)
1078
self.PropertyChanged(dbus.String(dbus_name),
1079
dbus_value)
1080
setattr(self, attrname, value)
1081
1082
return property(lambda self: getattr(self, attrname), setter)
1083
1084
1085
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1086
approvals_pending = notifychangeproperty(dbus.Boolean,
1087
"ApprovalPending",
1088
type_func = bool)
1089
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1090
last_enabled = notifychangeproperty(datetime_to_dbus,
1091
"LastEnabled")
1092
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1093
type_func = lambda checker:
1094
checker is not None)
1095
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1096
"LastCheckedOK")
1097
last_approval_request = notifychangeproperty(
1098
datetime_to_dbus, "LastApprovalRequest")
1099
approved_by_default = notifychangeproperty(dbus.Boolean,
1100
"ApprovedByDefault")
1101
approval_delay = notifychangeproperty(dbus.UInt64,
1102
"ApprovalDelay",
1103
type_func =
1104
timedelta_to_milliseconds)
1105
approval_duration = notifychangeproperty(
1106
dbus.UInt64, "ApprovalDuration",
1107
type_func = timedelta_to_milliseconds)
1108
host = notifychangeproperty(dbus.String, "Host")
1109
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1110
type_func =
1111
timedelta_to_milliseconds)
1112
extended_timeout = notifychangeproperty(
1113
dbus.UInt64, "ExtendedTimeout",
1114
type_func = timedelta_to_milliseconds)
1115
interval = notifychangeproperty(dbus.UInt64,
1116
"Interval",
1117
type_func =
1118
timedelta_to_milliseconds)
1119
checker_command = notifychangeproperty(dbus.String, "Checker")
1120
1121
del notifychangeproperty
691
1122
692
1123
def __del__(self, *args, **kwargs):
693
1124
try:
694
1125
self.remove_from_connection()
695
1126
except LookupError:
696
1127
pass
697
if hasattr(DBusObjectWithProperties, u"__del__"):
1128
if hasattr(DBusObjectWithProperties, "__del__"):
698
1129
DBusObjectWithProperties.__del__(self, *args, **kwargs)
699
1130
Client.__del__(self, *args, **kwargs)
700
1131
702
1133
*args, **kwargs):
703
1134
self.checker_callback_tag = None
704
1135
self.checker = None
705
# Emit D-Bus signal
706
self.PropertyChanged(dbus.String(u"checker_running"),
707
dbus.Boolean(False, variant_level=1))
708
1136
if os.WIFEXITED(condition):
709
1137
exitstatus = os.WEXITSTATUS(condition)
710
1138
# Emit D-Bus signal
720
1148
return Client.checker_callback(self, pid, condition, command,
721
1149
*args, **kwargs)
722
1150
723
def checked_ok(self, *args, **kwargs):
724
r = Client.checked_ok(self, *args, **kwargs)
725
# Emit D-Bus signal
726
self.PropertyChanged(
727
dbus.String(u"last_checked_ok"),
728
(self._datetime_to_dbus(self.last_checked_ok,
729
variant_level=1)))
730
return r
731
732
1151
def start_checker(self, *args, **kwargs):
733
1152
old_checker = self.checker
734
1153
if self.checker is not None:
741
1160
and old_checker_pid != self.checker.pid):
742
1161
# Emit D-Bus signal
743
1162
self.CheckerStarted(self.current_checker_command)
744
self.PropertyChanged(
745
dbus.String(u"checker_running"),
746
dbus.Boolean(True, variant_level=1))
747
return r
748
749
def stop_checker(self, *args, **kwargs):
750
old_checker = getattr(self, u"checker", None)
751
r = Client.stop_checker(self, *args, **kwargs)
752
if (old_checker is not None
753
and getattr(self, u"checker", None) is None):
754
self.PropertyChanged(dbus.String(u"checker_running"),
755
dbus.Boolean(False, variant_level=1))
756
return r
757
758
## D-Bus methods & signals
759
_interface = u"se.bsnet.fukt.Mandos.Client"
1163
return r
1164
1165
def _reset_approved(self):
1166
self.approved = None
1167
return False
1168
1169
def approve(self, value=True):
1170
self.send_changedstate()
1171
self.approved = value
1172
gobject.timeout_add(timedelta_to_milliseconds
1173
(self.approval_duration),
1174
self._reset_approved)
1175
1176
1177
## D-Bus methods, signals & properties
1178
_interface = "se.recompile.Mandos.Client"
1179
1180
## Signals
760
1181
761
1182
# CheckerCompleted - signal
762
@dbus.service.signal(_interface, signature=u"nxs")
1183
@dbus.service.signal(_interface, signature="nxs")
763
1184
def CheckerCompleted(self, exitcode, waitstatus, command):
764
1185
"D-Bus signal"
765
1186
pass
766
1187
767
1188
# CheckerStarted - signal
768
@dbus.service.signal(_interface, signature=u"s")
1189
@dbus.service.signal(_interface, signature="s")
769
1190
def CheckerStarted(self, command):
770
1191
"D-Bus signal"
771
1192
pass
772
1193
773
1194
# PropertyChanged - signal
774
@dbus.service.signal(_interface, signature=u"sv")
1195
@dbus.service.signal(_interface, signature="sv")
775
1196
def PropertyChanged(self, property, value):
776
1197
"D-Bus signal"
777
1198
pass
778
1199
779
# ReceivedSecret - signal
1200
# GotSecret - signal
780
1201
@dbus.service.signal(_interface)
781
def ReceivedSecret(self):
782
"D-Bus signal"
1202
def GotSecret(self):
1203
"""D-Bus signal
1204
Is sent after a successful transfer of secret from the Mandos
1205
server to mandos-client
1206
"""
783
1207
pass
784
1208
785
1209
# Rejected - signal
786
@dbus.service.signal(_interface)
787
def Rejected(self):
788
"D-Bus signal"
789
pass
790
791
# name - property
792
@dbus_service_property(_interface, signature=u"s", access=u"read")
793
def name_dbus_property(self):
1210
@dbus.service.signal(_interface, signature="s")
1211
def Rejected(self, reason):
1212
"D-Bus signal"
1213
pass
1214
1215
# NeedApproval - signal
1216
@dbus.service.signal(_interface, signature="tb")
1217
def NeedApproval(self, timeout, default):
1218
"D-Bus signal"
1219
return self.need_approval()
1220
1221
# NeRwequest - signal
1222
@dbus.service.signal(_interface, signature="s")
1223
def NewRequest(self, ip):
1224
"""D-Bus signal
1225
Is sent after a client request a password.
1226
"""
1227
pass
1228
1229
## Methods
1230
1231
# Approve - method
1232
@dbus.service.method(_interface, in_signature="b")
1233
def Approve(self, value):
1234
self.approve(value)
1235
1236
# CheckedOK - method
1237
@dbus.service.method(_interface)
1238
def CheckedOK(self):
1239
self.checked_ok()
1240
1241
# Enable - method
1242
@dbus.service.method(_interface)
1243
def Enable(self):
1244
"D-Bus method"
1245
self.enable()
1246
1247
# StartChecker - method
1248
@dbus.service.method(_interface)
1249
def StartChecker(self):
1250
"D-Bus method"
1251
self.start_checker()
1252
1253
# Disable - method
1254
@dbus.service.method(_interface)
1255
def Disable(self):
1256
"D-Bus method"
1257
self.disable()
1258
1259
# StopChecker - method
1260
@dbus.service.method(_interface)
1261
def StopChecker(self):
1262
self.stop_checker()
1263
1264
## Properties
1265
1266
# ApprovalPending - property
1267
@dbus_service_property(_interface, signature="b", access="read")
1268
def ApprovalPending_dbus_property(self):
1269
return dbus.Boolean(bool(self.approvals_pending))
1270
1271
# ApprovedByDefault - property
1272
@dbus_service_property(_interface, signature="b",
1273
access="readwrite")
1274
def ApprovedByDefault_dbus_property(self, value=None):
1275
if value is None: # get
1276
return dbus.Boolean(self.approved_by_default)
1277
self.approved_by_default = bool(value)
1278
1279
# ApprovalDelay - property
1280
@dbus_service_property(_interface, signature="t",
1281
access="readwrite")
1282
def ApprovalDelay_dbus_property(self, value=None):
1283
if value is None: # get
1284
return dbus.UInt64(self.approval_delay_milliseconds())
1285
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1286
1287
# ApprovalDuration - property
1288
@dbus_service_property(_interface, signature="t",
1289
access="readwrite")
1290
def ApprovalDuration_dbus_property(self, value=None):
1291
if value is None: # get
1292
return dbus.UInt64(timedelta_to_milliseconds(
1293
self.approval_duration))
1294
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1295
1296
# Name - property
1297
@dbus_service_property(_interface, signature="s", access="read")
1298
def Name_dbus_property(self):
794
1299
return dbus.String(self.name)
795
1300
796
# fingerprint - property
797
@dbus_service_property(_interface, signature=u"s", access=u"read")
798
def fingerprint_dbus_property(self):
1301
# Fingerprint - property
1302
@dbus_service_property(_interface, signature="s", access="read")
1303
def Fingerprint_dbus_property(self):
799
1304
return dbus.String(self.fingerprint)
800
1305
801
# host - property
802
@dbus_service_property(_interface, signature=u"s",
803
access=u"readwrite")
804
def host_dbus_property(self, value=None):
1306
# Host - property
1307
@dbus_service_property(_interface, signature="s",
1308
access="readwrite")
1309
def Host_dbus_property(self, value=None):
805
1310
if value is None: # get
806
1311
return dbus.String(self.host)
807
self.host = value
808
# Emit D-Bus signal
809
self.PropertyChanged(dbus.String(u"host"),
810
dbus.String(value, variant_level=1))
811
812
# created - property
813
@dbus_service_property(_interface, signature=u"s", access=u"read")
814
def created_dbus_property(self):
815
return dbus.String(self._datetime_to_dbus(self.created))
816
817
# last_enabled - property
818
@dbus_service_property(_interface, signature=u"s", access=u"read")
819
def last_enabled_dbus_property(self):
820
if self.last_enabled is None:
821
return dbus.String(u"")
822
return dbus.String(self._datetime_to_dbus(self.last_enabled))
823
824
# enabled - property
825
@dbus_service_property(_interface, signature=u"b",
826
access=u"readwrite")
827
def enabled_dbus_property(self, value=None):
1312
self.host = unicode(value)
1313
1314
# Created - property
1315
@dbus_service_property(_interface, signature="s", access="read")
1316
def Created_dbus_property(self):
1317
return datetime_to_dbus(self.created)
1318
1319
# LastEnabled - property
1320
@dbus_service_property(_interface, signature="s", access="read")
1321
def LastEnabled_dbus_property(self):
1322
return datetime_to_dbus(self.last_enabled)
1323
1324
# Enabled - property
1325
@dbus_service_property(_interface, signature="b",
1326
access="readwrite")
1327
def Enabled_dbus_property(self, value=None):
828
1328
if value is None: # get
829
1329
return dbus.Boolean(self.enabled)
830
1330
if value:
832
1332
else:
833
1333
self.disable()
834
1334
835
# last_checked_ok - property
836
@dbus_service_property(_interface, signature=u"s", access=u"read")
837
def last_checked_ok_dbus_property(self):
838
if self.last_checked_ok is None:
839
return dbus.String(u"")
840
return dbus.String(self._datetime_to_dbus(self
841
.last_checked_ok))
842
843
# timeout - property
844
@dbus_service_property(_interface, signature=u"t",
845
access=u"readwrite")
846
def timeout_dbus_property(self, value=None):
1335
# LastCheckedOK - property
1336
@dbus_service_property(_interface, signature="s",
1337
access="readwrite")
1338
def LastCheckedOK_dbus_property(self, value=None):
1339
if value is not None:
1340
self.checked_ok()
1341
return
1342
return datetime_to_dbus(self.last_checked_ok)
1343
1344
# Expires - property
1345
@dbus_service_property(_interface, signature="s", access="read")
1346
def Expires_dbus_property(self):
1347
return datetime_to_dbus(self.expires)
1348
1349
# LastApprovalRequest - property
1350
@dbus_service_property(_interface, signature="s", access="read")
1351
def LastApprovalRequest_dbus_property(self):
1352
return datetime_to_dbus(self.last_approval_request)
1353
1354
# Timeout - property
1355
@dbus_service_property(_interface, signature="t",
1356
access="readwrite")
1357
def Timeout_dbus_property(self, value=None):
847
1358
if value is None: # get
848
1359
return dbus.UInt64(self.timeout_milliseconds())
849
1360
self.timeout = datetime.timedelta(0, 0, 0, value)
850
# Emit D-Bus signal
851
self.PropertyChanged(dbus.String(u"timeout"),
852
dbus.UInt64(value, variant_level=1))
853
if getattr(self, u"disable_initiator_tag", None) is None:
1361
if getattr(self, "disable_initiator_tag", None) is None:
854
1362
return
855
1363
# Reschedule timeout
856
1364
gobject.source_remove(self.disable_initiator_tag)
857
1365
self.disable_initiator_tag = None
858
time_to_die = (self.
859
_timedelta_to_milliseconds((self
860
.last_checked_ok
861
+ self.timeout)
862
- datetime.datetime
863
.utcnow()))
1366
self.expires = None
1367
time_to_die = timedelta_to_milliseconds((self
1368
.last_checked_ok
1369
+ self.timeout)
1370
- datetime.datetime
1371
.utcnow())
864
1372
if time_to_die <= 0:
865
1373
# The timeout has passed
866
1374
self.disable()
867
1375
else:
1376
self.expires = (datetime.datetime.utcnow()
1377
+ datetime.timedelta(milliseconds =
1378
time_to_die))
868
1379
self.disable_initiator_tag = (gobject.timeout_add
869
1380
(time_to_die, self.disable))
870
1381
871
# interval - property
872
@dbus_service_property(_interface, signature=u"t",
873
access=u"readwrite")
874
def interval_dbus_property(self, value=None):
1382
# ExtendedTimeout - property
1383
@dbus_service_property(_interface, signature="t",
1384
access="readwrite")
1385
def ExtendedTimeout_dbus_property(self, value=None):
1386
if value is None: # get
1387
return dbus.UInt64(self.extended_timeout_milliseconds())
1388
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1389
1390
# Interval - property
1391
@dbus_service_property(_interface, signature="t",
1392
access="readwrite")
1393
def Interval_dbus_property(self, value=None):
875
1394
if value is None: # get
876
1395
return dbus.UInt64(self.interval_milliseconds())
877
1396
self.interval = datetime.timedelta(0, 0, 0, value)
878
# Emit D-Bus signal
879
self.PropertyChanged(dbus.String(u"interval"),
880
dbus.UInt64(value, variant_level=1))
881
if getattr(self, u"checker_initiator_tag", None) is None:
1397
if getattr(self, "checker_initiator_tag", None) is None:
882
1398
return
883
# Reschedule checker run
884
gobject.source_remove(self.checker_initiator_tag)
885
self.checker_initiator_tag = (gobject.timeout_add
886
(value, self.start_checker))
887
self.start_checker() # Start one now, too
888
889
# checker - property
890
@dbus_service_property(_interface, signature=u"s",
891
access=u"readwrite")
892
def checker_dbus_property(self, value=None):
1399
if self.enabled:
1400
# Reschedule checker run
1401
gobject.source_remove(self.checker_initiator_tag)
1402
self.checker_initiator_tag = (gobject.timeout_add
1403
(value, self.start_checker))
1404
self.start_checker() # Start one now, too
1405
1406
# Checker - property
1407
@dbus_service_property(_interface, signature="s",
1408
access="readwrite")
1409
def Checker_dbus_property(self, value=None):
893
1410
if value is None: # get
894
1411
return dbus.String(self.checker_command)
895
self.checker_command = value
896
# Emit D-Bus signal
897
self.PropertyChanged(dbus.String(u"checker"),
898
dbus.String(self.checker_command,
899
variant_level=1))
1412
self.checker_command = unicode(value)
900
1413
901
# checker_running - property
902
@dbus_service_property(_interface, signature=u"b",
903
access=u"readwrite")
904
def checker_running_dbus_property(self, value=None):
1414
# CheckerRunning - property
1415
@dbus_service_property(_interface, signature="b",
1416
access="readwrite")
1417
def CheckerRunning_dbus_property(self, value=None):
905
1418
if value is None: # get
906
1419
return dbus.Boolean(self.checker is not None)
907
1420
if value:
909
1422
else:
910
1423
self.stop_checker()
911
1424
912
# object_path - property
913
@dbus_service_property(_interface, signature=u"o", access=u"read")
914
def object_path_dbus_property(self):
1425
# ObjectPath - property
1426
@dbus_service_property(_interface, signature="o", access="read")
1427
def ObjectPath_dbus_property(self):
915
1428
return self.dbus_object_path # is already a dbus.ObjectPath
916
1429
917
# secret = property xxx
918
@dbus_service_property(_interface, signature=u"ay",
919
access=u"write", byte_arrays=True)
920
def secret_dbus_property(self, value):
1430
# Secret = property
1431
@dbus_service_property(_interface, signature="ay",
1432
access="write", byte_arrays=True)
1433
def Secret_dbus_property(self, value):
921
1434
self.secret = str(value)
922
1435
923
1436
del _interface
924
1437
925
1438
1439
class ProxyClient(object):
1440
def __init__(self, child_pipe, fpr, address):
1441
self._pipe = child_pipe
1442
self._pipe.send(('init', fpr, address))
1443
if not self._pipe.recv():
1444
raise KeyError()
1445
1446
def __getattribute__(self, name):
1447
if name == '_pipe':
1448
return super(ProxyClient, self).__getattribute__(name)
1449
self._pipe.send(('getattr', name))
1450
data = self._pipe.recv()
1451
if data[0] == 'data':
1452
return data[1]
1453
if data[0] == 'function':
1454
def func(*args, **kwargs):
1455
self._pipe.send(('funcall', name, args, kwargs))
1456
return self._pipe.recv()[1]
1457
return func
1458
1459
def __setattr__(self, name, value):
1460
if name == '_pipe':
1461
return super(ProxyClient, self).__setattr__(name, value)
1462
self._pipe.send(('setattr', name, value))
1463
1464
1465
class ClientDBusTransitional(ClientDBus):
1466
__metaclass__ = AlternateDBusNamesMetaclass
1467
1468
926
1469
class ClientHandler(socketserver.BaseRequestHandler, object):
927
1470
"""A class to handle client connections.
928
1471
930
1473
Note: This will run in its own forked process."""
931
1474
932
1475
def handle(self):
933
logger.info(u"TCP connection from: %s",
934
unicode(self.client_address))
935
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
936
# Open IPC pipe to parent process
937
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
1476
with contextlib.closing(self.server.child_pipe) as child_pipe:
1477
logger.info("TCP connection from: %s",
1478
unicode(self.client_address))
1479
logger.debug("Pipe FD: %d",
1480
self.server.child_pipe.fileno())
1481
938
1482
session = (gnutls.connection
939
1483
.ClientSession(self.request,
940
1484
gnutls.connection
941
1485
.X509Credentials()))
942
1486
943
line = self.request.makefile().readline()
944
logger.debug(u"Protocol version: %r", line)
945
try:
946
if int(line.strip().split()[0]) > 1:
947
raise RuntimeError
948
except (ValueError, IndexError, RuntimeError), error:
949
logger.error(u"Unknown protocol version: %s", error)
950
return
951
952
1487
# Note: gnutls.connection.X509Credentials is really a
953
1488
# generic GnuTLS certificate credentials object so long as
954
1489
# no X.509 keys are added to it. Therefore, we can use it
955
1490
# here despite using OpenPGP certificates.
956
1491
957
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
958
# u"+AES-256-CBC", u"+SHA1",
959
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
960
# u"+DHE-DSS"))
1492
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1493
# "+AES-256-CBC", "+SHA1",
1494
# "+COMP-NULL", "+CTYPE-OPENPGP",
1495
# "+DHE-DSS"))
961
1496
# Use a fallback default, since this MUST be set.
962
1497
priority = self.server.gnutls_priority
963
1498
if priority is None:
964
priority = u"NORMAL"
1499
priority = "NORMAL"
965
1500
(gnutls.library.functions
966
1501
.gnutls_priority_set_direct(session._c_object,
967
1502
priority, None))
968
1503
1504
# Start communication using the Mandos protocol
1505
# Get protocol number
1506
line = self.request.makefile().readline()
1507
logger.debug("Protocol version: %r", line)
1508
try:
1509
if int(line.strip().split()[0]) > 1:
1510
raise RuntimeError
1511
except (ValueError, IndexError, RuntimeError) as error:
1512
logger.error("Unknown protocol version: %s", error)
1513
return
1514
1515
# Start GnuTLS connection
969
1516
try:
970
1517
session.handshake()
971
except gnutls.errors.GNUTLSError, error:
972
logger.warning(u"Handshake failed: %s", error)
1518
except gnutls.errors.GNUTLSError as error:
1519
logger.warning("Handshake failed: %s", error)
973
1520
# Do not run session.bye() here: the session is not
974
1521
# established. Just abandon the request.
975
1522
return
976
logger.debug(u"Handshake succeeded")
1523
logger.debug("Handshake succeeded")
1524
1525
approval_required = False
977
1526
try:
978
fpr = self.fingerprint(self.peer_certificate(session))
979
except (TypeError, gnutls.errors.GNUTLSError), error:
980
logger.warning(u"Bad certificate: %s", error)
981
session.bye()
982
return
983
logger.debug(u"Fingerprint: %s", fpr)
1527
try:
1528
fpr = self.fingerprint(self.peer_certificate
1529
(session))
1530
except (TypeError,
1531
gnutls.errors.GNUTLSError) as error:
1532
logger.warning("Bad certificate: %s", error)
1533
return
1534
logger.debug("Fingerprint: %s", fpr)
1535
1536
try:
1537
client = ProxyClient(child_pipe, fpr,
1538
self.client_address)
1539
except KeyError:
1540
return
1541
1542
if self.server.use_dbus:
1543
# Emit D-Bus signal
1544
client.NewRequest(str(self.client_address))
1545
1546
if client.approval_delay:
1547
delay = client.approval_delay
1548
client.approvals_pending += 1
1549
approval_required = True
1550
1551
while True:
1552
if not client.enabled:
1553
logger.info("Client %s is disabled",
1554
client.name)
1555
if self.server.use_dbus:
1556
# Emit D-Bus signal
1557
client.Rejected("Disabled")
1558
return
1559
1560
if client.approved or not client.approval_delay:
1561
#We are approved or approval is disabled
1562
break
1563
elif client.approved is None:
1564
logger.info("Client %s needs approval",
1565
client.name)
1566
if self.server.use_dbus:
1567
# Emit D-Bus signal
1568
client.NeedApproval(
1569
client.approval_delay_milliseconds(),
1570
client.approved_by_default)
1571
else:
1572
logger.warning("Client %s was not approved",
1573
client.name)
1574
if self.server.use_dbus:
1575
# Emit D-Bus signal
1576
client.Rejected("Denied")
1577
return
1578
1579
#wait until timeout or approved
1580
time = datetime.datetime.now()
1581
client.changedstate.acquire()
1582
(client.changedstate.wait
1583
(float(client.timedelta_to_milliseconds(delay)
1584
/ 1000)))
1585
client.changedstate.release()
1586
time2 = datetime.datetime.now()
1587
if (time2 - time) >= delay:
1588
if not client.approved_by_default:
1589
logger.warning("Client %s timed out while"
1590
" waiting for approval",
1591
client.name)
1592
if self.server.use_dbus:
1593
# Emit D-Bus signal
1594
client.Rejected("Approval timed out")
1595
return
1596
else:
1597
break
1598
else:
1599
delay -= time2 - time
1600
1601
sent_size = 0
1602
while sent_size < len(client.secret):
1603
try:
1604
sent = session.send(client.secret[sent_size:])
1605
except gnutls.errors.GNUTLSError as error:
1606
logger.warning("gnutls send failed")
1607
return
1608
logger.debug("Sent: %d, remaining: %d",
1609
sent, len(client.secret)
1610
- (sent_size + sent))
1611
sent_size += sent
1612
1613
logger.info("Sending secret to %s", client.name)
1614
# bump the timeout using extended_timeout
1615
client.checked_ok(client.extended_timeout)
1616
if self.server.use_dbus:
1617
# Emit D-Bus signal
1618
client.GotSecret()
984
1619
985
for c in self.server.clients:
986
if c.fingerprint == fpr:
987
client = c
988
break
989
else:
990
ipc.write(u"NOTFOUND %s %s\n"
991
% (fpr, unicode(self.client_address)))
992
session.bye()
993
return
994
# Have to check if client.still_valid(), since it is
995
# possible that the client timed out while establishing
996
# the GnuTLS session.
997
if not client.still_valid():
998
ipc.write(u"INVALID %s\n" % client.name)
999
session.bye()
1000
return
1001
ipc.write(u"SENDING %s\n" % client.name)
1002
sent_size = 0
1003
while sent_size < len(client.secret):
1004
sent = session.send(client.secret[sent_size:])
1005
logger.debug(u"Sent: %d, remaining: %d",
1006
sent, len(client.secret)
1007
- (sent_size + sent))
1008
sent_size += sent
1009
session.bye()
1620
finally:
1621
if approval_required:
1622
client.approvals_pending -= 1
1623
try:
1624
session.bye()
1625
except gnutls.errors.GNUTLSError as error:
1626
logger.warning("GnuTLS bye failed")
1010
1627
1011
1628
@staticmethod
1012
1629
def peer_certificate(session):
1022
1639
.gnutls_certificate_get_peers
1023
1640
(session._c_object, ctypes.byref(list_size)))
1024
1641
if not bool(cert_list) and list_size.value != 0:
1025
raise gnutls.errors.GNUTLSError(u"error getting peer"
1026
u" certificate")
1642
raise gnutls.errors.GNUTLSError("error getting peer"
1643
" certificate")
1027
1644
if list_size.value == 0:
1028
1645
return None
1029
1646
cert = cert_list[0]
1055
1672
if crtverify.value != 0:
1056
1673
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1057
1674
raise (gnutls.errors.CertificateSecurityError
1058
(u"Verify failed"))
1675
("Verify failed"))
1059
1676
# New buffer for the fingerprint
1060
1677
buf = ctypes.create_string_buffer(20)
1061
1678
buf_len = ctypes.c_size_t()
1068
1685
# Convert the buffer to a Python bytestring
1069
1686
fpr = ctypes.string_at(buf, buf_len.value)
1070
1687
# Convert the bytestring to hexadecimal notation
1071
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1688
hex_fpr = binascii.hexlify(fpr).upper()
1072
1689
return hex_fpr
1073
1690
1074
1691
1075
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1076
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1692
class MultiprocessingMixIn(object):
1693
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1694
def sub_process_main(self, request, address):
1695
try:
1696
self.finish_request(request, address)
1697
except Exception:
1698
self.handle_error(request, address)
1699
self.close_request(request)
1700
1701
def process_request(self, request, address):
1702
"""Start a new process to process the request."""
1703
proc = multiprocessing.Process(target = self.sub_process_main,
1704
args = (request,
1705
address))
1706
proc.start()
1707
return proc
1708
1709
1710
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1711
""" adds a pipe to the MixIn """
1077
1712
def process_request(self, request, client_address):
1078
1713
"""Overrides and wraps the original process_request().
1079
1714
1080
1715
This function creates a new pipe in self.pipe
1081
1716
"""
1082
self.pipe = os.pipe()
1083
super(ForkingMixInWithPipe,
1084
self).process_request(request, client_address)
1085
os.close(self.pipe[1]) # close write end
1086
self.add_pipe(self.pipe[0])
1087
def add_pipe(self, pipe):
1717
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1718
1719
proc = MultiprocessingMixIn.process_request(self, request,
1720
client_address)
1721
self.child_pipe.close()
1722
self.add_pipe(parent_pipe, proc)
1723
1724
def add_pipe(self, parent_pipe, proc):
1088
1725
"""Dummy function; override as necessary"""
1089
os.close(pipe)
1090
1091
1092
class IPv6_TCPServer(ForkingMixInWithPipe,
1726
raise NotImplementedError
1727
1728
1729
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1093
1730
socketserver.TCPServer, object):
1094
1731
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1095
1732
1111
1748
bind to an address or port if they were not specified."""
1112
1749
if self.interface is not None:
1113
1750
if SO_BINDTODEVICE is None:
1114
logger.error(u"SO_BINDTODEVICE does not exist;"
1115
u" cannot bind to interface %s",
1751
logger.error("SO_BINDTODEVICE does not exist;"
1752
" cannot bind to interface %s",
1116
1753
self.interface)
1117
1754
else:
1118
1755
try:
1119
1756
self.socket.setsockopt(socket.SOL_SOCKET,
1120
1757
SO_BINDTODEVICE,
1121
1758
str(self.interface
1122
+ u'\0'))
1123
except socket.error, error:
1759
+ '\0'))
1760
except socket.error as error:
1124
1761
if error[0] == errno.EPERM:
1125
logger.error(u"No permission to"
1126
u" bind to interface %s",
1762
logger.error("No permission to"
1763
" bind to interface %s",
1127
1764
self.interface)
1128
1765
elif error[0] == errno.ENOPROTOOPT:
1129
logger.error(u"SO_BINDTODEVICE not available;"
1130
u" cannot bind to interface %s",
1766
logger.error("SO_BINDTODEVICE not available;"
1767
" cannot bind to interface %s",
1131
1768
self.interface)
1132
1769
else:
1133
1770
raise
1135
1772
if self.server_address[0] or self.server_address[1]:
1136
1773
if not self.server_address[0]:
1137
1774
if self.address_family == socket.AF_INET6:
1138
any_address = u"::" # in6addr_any
1775
any_address = "::" # in6addr_any
1139
1776
else:
1140
1777
any_address = socket.INADDR_ANY
1141
1778
self.server_address = (any_address,
1168
1805
self.enabled = False
1169
1806
self.clients = clients
1170
1807
if self.clients is None:
1171
self.clients = set()
1808
self.clients = {}
1172
1809
self.use_dbus = use_dbus
1173
1810
self.gnutls_priority = gnutls_priority
1174
1811
IPv6_TCPServer.__init__(self, server_address,
1178
1815
def server_activate(self):
1179
1816
if self.enabled:
1180
1817
return socketserver.TCPServer.server_activate(self)
1818
1181
1819
def enable(self):
1182
1820
self.enabled = True
1183
def add_pipe(self, pipe):
1821
1822
def add_pipe(self, parent_pipe, proc):
1184
1823
# Call "handle_ipc" for both data and EOF events
1185
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1186
self.handle_ipc)
1187
def handle_ipc(self, source, condition, file_objects={}):
1824
gobject.io_add_watch(parent_pipe.fileno(),
1825
gobject.IO_IN | gobject.IO_HUP,
1826
functools.partial(self.handle_ipc,
1827
parent_pipe =
1828
parent_pipe,
1829
proc = proc))
1830
1831
def handle_ipc(self, source, condition, parent_pipe=None,
1832
proc = None, client_object=None):
1188
1833
condition_names = {
1189
gobject.IO_IN: u"IN", # There is data to read.
1190
gobject.IO_OUT: u"OUT", # Data can be written (without
1834
gobject.IO_IN: "IN", # There is data to read.
1835
gobject.IO_OUT: "OUT", # Data can be written (without
1191
1836
# blocking).
1192
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1193
gobject.IO_ERR: u"ERR", # Error condition.
1194
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1837
gobject.IO_PRI: "PRI", # There is urgent data to read.
1838
gobject.IO_ERR: "ERR", # Error condition.
1839
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1195
1840
# broken, usually for pipes and
1196
1841
# sockets).
1197
1842
}
1199
1844
for cond, name in
1200
1845
condition_names.iteritems()
1201
1846
if cond & condition)
1202
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1203
conditions_string)
1204
1205
# Turn the pipe file descriptor into a Python file object
1206
if source not in file_objects:
1207
file_objects[source] = os.fdopen(source, u"r", 1)
1208
1209
# Read a line from the file object
1210
cmdline = file_objects[source].readline()
1211
if not cmdline: # Empty line means end of file
1212
# close the IPC pipe
1213
file_objects[source].close()
1214
del file_objects[source]
1215
1216
# Stop calling this function
1217
return False
1218
1219
logger.debug(u"IPC command: %r", cmdline)
1220
1221
# Parse and act on command
1222
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1223
1224
if cmd == u"NOTFOUND":
1225
logger.warning(u"Client not found for fingerprint: %s",
1226
args)
1227
if self.use_dbus:
1228
# Emit D-Bus signal
1229
mandos_dbus_service.ClientNotFound(args)
1230
elif cmd == u"INVALID":
1231
for client in self.clients:
1232
if client.name == args:
1233
logger.warning(u"Client %s is invalid", args)
1234
if self.use_dbus:
1235
# Emit D-Bus signal
1236
client.Rejected()
1237
break
1238
else:
1239
logger.error(u"Unknown client %s is invalid", args)
1240
elif cmd == u"SENDING":
1241
for client in self.clients:
1242
if client.name == args:
1243
logger.info(u"Sending secret to %s", client.name)
1244
client.checked_ok()
1245
if self.use_dbus:
1246
# Emit D-Bus signal
1247
client.ReceivedSecret()
1248
break
1249
else:
1250
logger.error(u"Sending secret to unknown client %s",
1251
args)
1252
else:
1253
logger.error(u"Unknown IPC command: %r", cmdline)
1254
1255
# Keep calling this function
1847
# error, or the other end of multiprocessing.Pipe has closed
1848
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1849
# Wait for other process to exit
1850
proc.join()
1851
return False
1852
1853
# Read a request from the child
1854
request = parent_pipe.recv()
1855
command = request[0]
1856
1857
if command == 'init':
1858
fpr = request[1]
1859
address = request[2]
1860
1861
for c in self.clients.itervalues():
1862
if c.fingerprint == fpr:
1863
client = c
1864
break
1865
else:
1866
logger.info("Client not found for fingerprint: %s, ad"
1867
"dress: %s", fpr, address)
1868
if self.use_dbus:
1869
# Emit D-Bus signal
1870
mandos_dbus_service.ClientNotFound(fpr,
1871
address[0])
1872
parent_pipe.send(False)
1873
return False
1874
1875
gobject.io_add_watch(parent_pipe.fileno(),
1876
gobject.IO_IN | gobject.IO_HUP,
1877
functools.partial(self.handle_ipc,
1878
parent_pipe =
1879
parent_pipe,
1880
proc = proc,
1881
client_object =
1882
client))
1883
parent_pipe.send(True)
1884
# remove the old hook in favor of the new above hook on
1885
# same fileno
1886
return False
1887
if command == 'funcall':
1888
funcname = request[1]
1889
args = request[2]
1890
kwargs = request[3]
1891
1892
parent_pipe.send(('data', getattr(client_object,
1893
funcname)(*args,
1894
**kwargs)))
1895
1896
if command == 'getattr':
1897
attrname = request[1]
1898
if callable(client_object.__getattribute__(attrname)):
1899
parent_pipe.send(('function',))
1900
else:
1901
parent_pipe.send(('data', client_object
1902
.__getattribute__(attrname)))
1903
1904
if command == 'setattr':
1905
attrname = request[1]
1906
value = request[2]
1907
setattr(client_object, attrname, value)
1908
1256
1909
return True
1257
1910
1258
1911
1259
1912
def string_to_delta(interval):
1260
1913
"""Parse a string and return a datetime.timedelta
1261
1914
1262
>>> string_to_delta(u'7d')
1915
>>> string_to_delta('7d')
1263
1916
datetime.timedelta(7)
1264
>>> string_to_delta(u'60s')
1917
>>> string_to_delta('60s')
1265
1918
datetime.timedelta(0, 60)
1266
>>> string_to_delta(u'60m')
1919
>>> string_to_delta('60m')
1267
1920
datetime.timedelta(0, 3600)
1268
>>> string_to_delta(u'24h')
1921
>>> string_to_delta('24h')
1269
1922
datetime.timedelta(1)
1270
>>> string_to_delta(u'1w')
1923
>>> string_to_delta('1w')
1271
1924
datetime.timedelta(7)
1272
>>> string_to_delta(u'5m 30s')
1925
>>> string_to_delta('5m 30s')
1273
1926
datetime.timedelta(0, 330)
1274
1927
"""
1275
1928
timevalue = datetime.timedelta(0)
1277
1930
try:
1278
1931
suffix = unicode(s[-1])
1279
1932
value = int(s[:-1])
1280
if suffix == u"d":
1933
if suffix == "d":
1281
1934
delta = datetime.timedelta(value)
1282
elif suffix == u"s":
1935
elif suffix == "s":
1283
1936
delta = datetime.timedelta(0, value)
1284
elif suffix == u"m":
1937
elif suffix == "m":
1285
1938
delta = datetime.timedelta(0, 0, 0, 0, value)
1286
elif suffix == u"h":
1939
elif suffix == "h":
1287
1940
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1288
elif suffix == u"w":
1941
elif suffix == "w":
1289
1942
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1290
1943
else:
1291
raise ValueError
1292
except (ValueError, IndexError):
1293
raise ValueError
1944
raise ValueError("Unknown suffix %r" % suffix)
1945
except (ValueError, IndexError) as e:
1946
raise ValueError(*(e.args))
1294
1947
timevalue += delta
1295
1948
return timevalue
1296
1949
1297
1950
1298
def if_nametoindex(interface):
1299
"""Call the C function if_nametoindex(), or equivalent
1300
1301
Note: This function cannot accept a unicode string."""
1302
global if_nametoindex
1303
try:
1304
if_nametoindex = (ctypes.cdll.LoadLibrary
1305
(ctypes.util.find_library(u"c"))
1306
.if_nametoindex)
1307
except (OSError, AttributeError):
1308
logger.warning(u"Doing if_nametoindex the hard way")
1309
def if_nametoindex(interface):
1310
"Get an interface index the hard way, i.e. using fcntl()"
1311
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1312
with closing(socket.socket()) as s:
1313
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1314
struct.pack(str(u"16s16x"),
1315
interface))
1316
interface_index = struct.unpack(str(u"I"),
1317
ifreq[16:20])[0]
1318
return interface_index
1319
return if_nametoindex(interface)
1320
1321
1322
1951
def daemon(nochdir = False, noclose = False):
1323
1952
"""See daemon(3). Standard BSD Unix function.
1324
1953
1327
1956
sys.exit()
1328
1957
os.setsid()
1329
1958
if not nochdir:
1330
os.chdir(u"/")
1959
os.chdir("/")
1331
1960
if os.fork():
1332
1961
sys.exit()
1333
1962
if not noclose:
1335
1964
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1336
1965
if not stat.S_ISCHR(os.fstat(null).st_mode):
1337
1966
raise OSError(errno.ENODEV,
1338
u"/dev/null not a character device")
1967
"%s not a character device"
1968
% os.path.devnull)
1339
1969
os.dup2(null, sys.stdin.fileno())
1340
1970
os.dup2(null, sys.stdout.fileno())
1341
1971
os.dup2(null, sys.stderr.fileno())
1348
1978
##################################################################
1349
1979
# Parsing of options, both command line and config file
1350
1980
1351
parser = optparse.OptionParser(version = "%%prog %s" % version)
1352
parser.add_option("-i", u"--interface", type=u"string",
1353
metavar="IF", help=u"Bind to interface IF")
1354
parser.add_option("-a", u"--address", type=u"string",
1355
help=u"Address to listen for requests on")
1356
parser.add_option("-p", u"--port", type=u"int",
1357
help=u"Port number to receive requests on")
1358
parser.add_option("--check", action=u"store_true",
1359
help=u"Run self-test")
1360
parser.add_option("--debug", action=u"store_true",
1361
help=u"Debug mode; run in foreground and log to"
1362
u" terminal")
1363
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1364
u" priority string (see GnuTLS documentation)")
1365
parser.add_option("--servicename", type=u"string",
1366
metavar=u"NAME", help=u"Zeroconf service name")
1367
parser.add_option("--configdir", type=u"string",
1368
default=u"/etc/mandos", metavar=u"DIR",
1369
help=u"Directory to search for configuration"
1370
u" files")
1371
parser.add_option("--no-dbus", action=u"store_false",
1372
dest=u"use_dbus", help=u"Do not provide D-Bus"
1373
u" system bus interface")
1374
parser.add_option("--no-ipv6", action=u"store_false",
1375
dest=u"use_ipv6", help=u"Do not use IPv6")
1376
options = parser.parse_args()[0]
1981
parser = argparse.ArgumentParser()
1982
parser.add_argument("-v", "--version", action="version",
1983
version = "%%(prog)s %s" % version,
1984
help="show version number and exit")
1985
parser.add_argument("-i", "--interface", metavar="IF",
1986
help="Bind to interface IF")
1987
parser.add_argument("-a", "--address",
1988
help="Address to listen for requests on")
1989
parser.add_argument("-p", "--port", type=int,
1990
help="Port number to receive requests on")
1991
parser.add_argument("--check", action="store_true",
1992
help="Run self-test")
1993
parser.add_argument("--debug", action="store_true",
1994
help="Debug mode; run in foreground and log"
1995
" to terminal")
1996
parser.add_argument("--debuglevel", metavar="LEVEL",
1997
help="Debug level for stdout output")
1998
parser.add_argument("--priority", help="GnuTLS"
1999
" priority string (see GnuTLS documentation)")
2000
parser.add_argument("--servicename",
2001
metavar="NAME", help="Zeroconf service name")
2002
parser.add_argument("--configdir",
2003
default="/etc/mandos", metavar="DIR",
2004
help="Directory to search for configuration"
2005
" files")
2006
parser.add_argument("--no-dbus", action="store_false",
2007
dest="use_dbus", help="Do not provide D-Bus"
2008
" system bus interface")
2009
parser.add_argument("--no-ipv6", action="store_false",
2010
dest="use_ipv6", help="Do not use IPv6")
2011
parser.add_argument("--no-restore", action="store_false",
2012
dest="restore", help="Do not restore stored"
2013
" state")
2014
parser.add_argument("--statedir", metavar="DIR",
2015
help="Directory to save/restore state in")
2016
2017
options = parser.parse_args()
1377
2018
1378
2019
if options.check:
1379
2020
import doctest
1381
2022
sys.exit()
1382
2023
1383
2024
# Default values for config file for server-global settings
1384
server_defaults = { u"interface": u"",
1385
u"address": u"",
1386
u"port": u"",
1387
u"debug": u"False",
1388
u"priority":
1389
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1390
u"servicename": u"Mandos",
1391
u"use_dbus": u"True",
1392
u"use_ipv6": u"True",
2025
server_defaults = { "interface": "",
2026
"address": "",
2027
"port": "",
2028
"debug": "False",
2029
"priority":
2030
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2031
"servicename": "Mandos",
2032
"use_dbus": "True",
2033
"use_ipv6": "True",
2034
"debuglevel": "",
2035
"restore": "True",
2036
"statedir": "/var/lib/mandos"
1393
2037
}
1394
2038
1395
2039
# Parse config file for server-global settings
1396
2040
server_config = configparser.SafeConfigParser(server_defaults)
1397
2041
del server_defaults
1398
2042
server_config.read(os.path.join(options.configdir,
1399
u"mandos.conf"))
2043
"mandos.conf"))
1400
2044
# Convert the SafeConfigParser object to a dict
1401
2045
server_settings = server_config.defaults()
1402
2046
# Use the appropriate methods on the non-string config options
1403
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1404
server_settings[option] = server_config.getboolean(u"DEFAULT",
2047
for option in ("debug", "use_dbus", "use_ipv6"):
2048
server_settings[option] = server_config.getboolean("DEFAULT",
1405
2049
option)
1406
2050
if server_settings["port"]:
1407
server_settings["port"] = server_config.getint(u"DEFAULT",
1408
u"port")
2051
server_settings["port"] = server_config.getint("DEFAULT",
2052
"port")
1409
2053
del server_config
1410
2054
1411
2055
# Override the settings from the config file with command line
1412
2056
# options, if set.
1413
for option in (u"interface", u"address", u"port", u"debug",
1414
u"priority", u"servicename", u"configdir",
1415
u"use_dbus", u"use_ipv6"):
2057
for option in ("interface", "address", "port", "debug",
2058
"priority", "servicename", "configdir",
2059
"use_dbus", "use_ipv6", "debuglevel", "restore",
2060
"statedir"):
1416
2061
value = getattr(options, option)
1417
2062
if value is not None:
1418
2063
server_settings[option] = value
1426
2071
##################################################################
1427
2072
1428
2073
# For convenience
1429
debug = server_settings[u"debug"]
1430
use_dbus = server_settings[u"use_dbus"]
1431
use_ipv6 = server_settings[u"use_ipv6"]
1432
1433
if not debug:
1434
syslogger.setLevel(logging.WARNING)
1435
console.setLevel(logging.WARNING)
1436
1437
if server_settings[u"servicename"] != u"Mandos":
2074
debug = server_settings["debug"]
2075
debuglevel = server_settings["debuglevel"]
2076
use_dbus = server_settings["use_dbus"]
2077
use_ipv6 = server_settings["use_ipv6"]
2078
stored_state_path = os.path.join(server_settings["statedir"],
2079
stored_state_file)
2080
2081
if debug:
2082
initlogger(debug, logging.DEBUG)
2083
else:
2084
if not debuglevel:
2085
initlogger(debug)
2086
else:
2087
level = getattr(logging, debuglevel.upper())
2088
initlogger(debug, level)
2089
2090
if server_settings["servicename"] != "Mandos":
1438
2091
syslogger.setFormatter(logging.Formatter
1439
(u'Mandos (%s) [%%(process)d]:'
1440
u' %%(levelname)s: %%(message)s'
1441
% server_settings[u"servicename"]))
2092
('Mandos (%s) [%%(process)d]:'
2093
' %%(levelname)s: %%(message)s'
2094
% server_settings["servicename"]))
1442
2095
1443
2096
# Parse config file with clients
1444
client_defaults = { u"timeout": u"1h",
1445
u"interval": u"5m",
1446
u"checker": u"fping -q -- %%(host)s",
1447
u"host": u"",
1448
}
1449
client_config = configparser.SafeConfigParser(client_defaults)
1450
client_config.read(os.path.join(server_settings[u"configdir"],
1451
u"clients.conf"))
2097
client_config = configparser.SafeConfigParser(Client.client_defaults)
2098
client_config.read(os.path.join(server_settings["configdir"],
2099
"clients.conf"))
1452
2100
1453
2101
global mandos_dbus_service
1454
2102
mandos_dbus_service = None
1455
2103
1456
tcp_server = MandosServer((server_settings[u"address"],
1457
server_settings[u"port"]),
2104
tcp_server = MandosServer((server_settings["address"],
2105
server_settings["port"]),
1458
2106
ClientHandler,
1459
interface=server_settings[u"interface"],
2107
interface=(server_settings["interface"]
2108
or None),
1460
2109
use_ipv6=use_ipv6,
1461
2110
gnutls_priority=
1462
server_settings[u"priority"],
2111
server_settings["priority"],
1463
2112
use_dbus=use_dbus)
1464
pidfilename = u"/var/run/mandos.pid"
1465
try:
1466
pidfile = open(pidfilename, u"w")
1467
except IOError:
1468
logger.error(u"Could not open file %r", pidfilename)
2113
if not debug:
2114
pidfilename = "/var/run/mandos.pid"
2115
try:
2116
pidfile = open(pidfilename, "w")
2117
except IOError:
2118
logger.error("Could not open file %r", pidfilename)
1469
2119
1470
2120
try:
1471
uid = pwd.getpwnam(u"_mandos").pw_uid
1472
gid = pwd.getpwnam(u"_mandos").pw_gid
2121
uid = pwd.getpwnam("_mandos").pw_uid
2122
gid = pwd.getpwnam("_mandos").pw_gid
1473
2123
except KeyError:
1474
2124
try:
1475
uid = pwd.getpwnam(u"mandos").pw_uid
1476
gid = pwd.getpwnam(u"mandos").pw_gid
2125
uid = pwd.getpwnam("mandos").pw_uid
2126
gid = pwd.getpwnam("mandos").pw_gid
1477
2127
except KeyError:
1478
2128
try:
1479
uid = pwd.getpwnam(u"nobody").pw_uid
1480
gid = pwd.getpwnam(u"nobody").pw_gid
2129
uid = pwd.getpwnam("nobody").pw_uid
2130
gid = pwd.getpwnam("nobody").pw_gid
1481
2131
except KeyError:
1482
2132
uid = 65534
1483
2133
gid = 65534
1484
2134
try:
1485
2135
os.setgid(gid)
1486
2136
os.setuid(uid)
1487
except OSError, error:
2137
except OSError as error:
1488
2138
if error[0] != errno.EPERM:
1489
2139
raise error
1490
2140
1491
# Enable all possible GnuTLS debugging
1492
2141
if debug:
2142
# Enable all possible GnuTLS debugging
2143
1493
2144
# "Use a log level over 10 to enable all debugging options."
1494
2145
# - GnuTLS manual
1495
2146
gnutls.library.functions.gnutls_global_set_log_level(11)
1496
2147
1497
2148
@gnutls.library.types.gnutls_log_func
1498
2149
def debug_gnutls(level, string):
1499
logger.debug(u"GnuTLS: %s", string[:-1])
2150
logger.debug("GnuTLS: %s", string[:-1])
1500
2151
1501
2152
(gnutls.library.functions
1502
2153
.gnutls_global_set_log_function(debug_gnutls))
2154
2155
# Redirect stdin so all checkers get /dev/null
2156
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2157
os.dup2(null, sys.stdin.fileno())
2158
if null > 2:
2159
os.close(null)
2160
2161
# Need to fork before connecting to D-Bus
2162
if not debug:
2163
# Close all input and output, do double fork, etc.
2164
daemon()
2165
2166
gobject.threads_init()
1503
2167
1504
2168
global main_loop
1505
2169
# From the Avahi example code
1508
2172
bus = dbus.SystemBus()
1509
2173
# End of Avahi example code
1510
2174
if use_dbus:
1511
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
2175
try:
2176
bus_name = dbus.service.BusName("se.recompile.Mandos",
2177
bus, do_not_queue=True)
2178
old_bus_name = (dbus.service.BusName
2179
("se.bsnet.fukt.Mandos", bus,
2180
do_not_queue=True))
2181
except dbus.exceptions.NameExistsException as e:
2182
logger.error(unicode(e) + ", disabling D-Bus")
2183
use_dbus = False
2184
server_settings["use_dbus"] = False
2185
tcp_server.use_dbus = False
1512
2186
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1513
service = AvahiService(name = server_settings[u"servicename"],
1514
servicetype = u"_mandos._tcp",
1515
protocol = protocol, bus = bus)
2187
service = AvahiServiceToSyslog(name =
2188
server_settings["servicename"],
2189
servicetype = "_mandos._tcp",
2190
protocol = protocol, bus = bus)
1516
2191
if server_settings["interface"]:
1517
2192
service.interface = (if_nametoindex
1518
(str(server_settings[u"interface"])))
2193
(str(server_settings["interface"])))
2194
2195
global multiprocessing_manager
2196
multiprocessing_manager = multiprocessing.Manager()
1519
2197
1520
2198
client_class = Client
1521
2199
if use_dbus:
1522
client_class = functools.partial(ClientDBus, bus = bus)
1523
tcp_server.clients.update(set(
1524
client_class(name = section,
1525
config= dict(client_config.items(section)))
1526
for section in client_config.sections()))
2200
client_class = functools.partial(ClientDBusTransitional,
2201
bus = bus)
2202
2203
client_settings = Client.config_parser(client_config)
2204
old_client_settings = {}
2205
clients_data = {}
2206
2207
# Get client data and settings from last running state.
2208
if server_settings["restore"]:
2209
try:
2210
with open(stored_state_path, "rb") as stored_state:
2211
clients_data, old_client_settings = (pickle.load
2212
(stored_state))
2213
os.remove(stored_state_path)
2214
except IOError as e:
2215
logger.warning("Could not load persistent state: {0}"
2216
.format(e))
2217
if e.errno != errno.ENOENT:
2218
raise
2219
except EOFError as e:
2220
logger.warning("Could not load persistent state: "
2221
"EOFError: {0}".format(e))
2222
2223
with PGPEngine() as pgp:
2224
for client_name, client in clients_data.iteritems():
2225
# Decide which value to use after restoring saved state.
2226
# We have three different values: Old config file,
2227
# new config file, and saved state.
2228
# New config value takes precedence if it differs from old
2229
# config value, otherwise use saved state.
2230
for name, value in client_settings[client_name].items():
2231
try:
2232
# For each value in new config, check if it
2233
# differs from the old config value (Except for
2234
# the "secret" attribute)
2235
if (name != "secret" and
2236
value != old_client_settings[client_name]
2237
[name]):
2238
client[name] = value
2239
except KeyError:
2240
pass
2241
2242
# Clients who has passed its expire date can still be
2243
# enabled if its last checker was successful. Clients
2244
# whose checker failed before we stored its state is
2245
# assumed to have failed all checkers during downtime.
2246
if client["enabled"]:
2247
if datetime.datetime.utcnow() >= client["expires"]:
2248
if not client["last_checked_ok"]:
2249
logger.warning(
2250
"disabling client {0} - Client never "
2251
"performed a successfull checker"
2252
.format(client["name"]))
2253
client["enabled"] = False
2254
elif client["last_checker_status"] != 0:
2255
logger.warning(
2256
"disabling client {0} - Client "
2257
"last checker failed with error code {1}"
2258
.format(client["name"],
2259
client["last_checker_status"]))
2260
client["enabled"] = False
2261
else:
2262
client["expires"] = (datetime.datetime
2263
.utcnow()
2264
+ client["timeout"])
2265
2266
try:
2267
client["secret"] = (
2268
pgp.decrypt(client["encrypted_secret"],
2269
client_settings[client_name]
2270
["secret"]))
2271
except PGPError:
2272
# If decryption fails, we use secret from new settings
2273
logger.debug("Failed to decrypt {0} old secret"
2274
.format(client_name))
2275
client["secret"] = (
2276
client_settings[client_name]["secret"])
2277
2278
2279
# Add/remove clients based on new changes made to config
2280
for client_name in set(old_client_settings) - set(client_settings):
2281
del clients_data[client_name]
2282
for client_name in set(client_settings) - set(old_client_settings):
2283
clients_data[client_name] = client_settings[client_name]
2284
2285
# Create clients all clients
2286
for client_name, client in clients_data.iteritems():
2287
tcp_server.clients[client_name] = client_class(
2288
name = client_name, settings = client)
2289
1527
2290
if not tcp_server.clients:
1528
logger.warning(u"No clients defined")
1529
1530
if debug:
1531
# Redirect stdin so all checkers get /dev/null
1532
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1533
os.dup2(null, sys.stdin.fileno())
1534
if null > 2:
1535
os.close(null)
1536
else:
1537
# No console logging
1538
logger.removeHandler(console)
1539
# Close all input and output, do double fork, etc.
1540
daemon()
1541
1542
try:
1543
with closing(pidfile):
1544
pid = os.getpid()
1545
pidfile.write(str(pid) + "\n")
1546
del pidfile
1547
except IOError:
1548
logger.error(u"Could not write to file %r with PID %d",
1549
pidfilename, pid)
1550
except NameError:
1551
# "pidfile" was never created
1552
pass
1553
del pidfilename
1554
1555
def cleanup():
1556
"Cleanup function; run on exit"
1557
service.cleanup()
2291
logger.warning("No clients defined")
1558
2292
1559
while tcp_server.clients:
1560
client = tcp_server.clients.pop()
1561
client.disable_hook = None
1562
client.disable()
1563
1564
atexit.register(cleanup)
1565
1566
2293
if not debug:
2294
try:
2295
with pidfile:
2296
pid = os.getpid()
2297
pidfile.write(str(pid) + "\n".encode("utf-8"))
2298
del pidfile
2299
except IOError:
2300
logger.error("Could not write to file %r with PID %d",
2301
pidfilename, pid)
2302
except NameError:
2303
# "pidfile" was never created
2304
pass
2305
del pidfilename
1567
2306
signal.signal(signal.SIGINT, signal.SIG_IGN)
2307
1568
2308
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1569
2309
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1570
2310
1572
2312
class MandosDBusService(dbus.service.Object):
1573
2313
"""A D-Bus proxy object"""
1574
2314
def __init__(self):
1575
dbus.service.Object.__init__(self, bus, u"/")
1576
_interface = u"se.bsnet.fukt.Mandos"
1577
1578
@dbus.service.signal(_interface, signature=u"oa{sv}")
1579
def ClientAdded(self, objpath, properties):
1580
"D-Bus signal"
1581
pass
1582
1583
@dbus.service.signal(_interface, signature=u"s")
1584
def ClientNotFound(self, fingerprint):
1585
"D-Bus signal"
1586
pass
1587
1588
@dbus.service.signal(_interface, signature=u"os")
2315
dbus.service.Object.__init__(self, bus, "/")
2316
_interface = "se.recompile.Mandos"
2317
2318
@dbus.service.signal(_interface, signature="o")
2319
def ClientAdded(self, objpath):
2320
"D-Bus signal"
2321
pass
2322
2323
@dbus.service.signal(_interface, signature="ss")
2324
def ClientNotFound(self, fingerprint, address):
2325
"D-Bus signal"
2326
pass
2327
2328
@dbus.service.signal(_interface, signature="os")
1589
2329
def ClientRemoved(self, objpath, name):
1590
2330
"D-Bus signal"
1591
2331
pass
1592
2332
1593
@dbus.service.method(_interface, out_signature=u"ao")
2333
@dbus.service.method(_interface, out_signature="ao")
1594
2334
def GetAllClients(self):
1595
2335
"D-Bus method"
1596
2336
return dbus.Array(c.dbus_object_path
1597
for c in tcp_server.clients)
2337
for c in
2338
tcp_server.clients.itervalues())
1598
2339
1599
2340
@dbus.service.method(_interface,
1600
out_signature=u"a{oa{sv}}")
2341
out_signature="a{oa{sv}}")
1601
2342
def GetAllClientsWithProperties(self):
1602
2343
"D-Bus method"
1603
2344
return dbus.Dictionary(
1604
((c.dbus_object_path, c.GetAll(u""))
1605
for c in tcp_server.clients),
1606
signature=u"oa{sv}")
2345
((c.dbus_object_path, c.GetAll(""))
2346
for c in tcp_server.clients.itervalues()),
2347
signature="oa{sv}")
1607
2348
1608
@dbus.service.method(_interface, in_signature=u"o")
2349
@dbus.service.method(_interface, in_signature="o")
1609
2350
def RemoveClient(self, object_path):
1610
2351
"D-Bus method"
1611
for c in tcp_server.clients:
2352
for c in tcp_server.clients.itervalues():
1612
2353
if c.dbus_object_path == object_path:
1613
tcp_server.clients.remove(c)
2354
del tcp_server.clients[c.name]
1614
2355
c.remove_from_connection()
1615
2356
# Don't signal anything except ClientRemoved
1616
c.disable(signal=False)
2357
c.disable(quiet=True)
1617
2358
# Emit D-Bus signal
1618
2359
self.ClientRemoved(object_path, c.name)
1619
2360
return
1620
raise KeyError
2361
raise KeyError(object_path)
1621
2362
1622
2363
del _interface
1623
2364
1624
mandos_dbus_service = MandosDBusService()
1625
1626
for client in tcp_server.clients:
2365
class MandosDBusServiceTransitional(MandosDBusService):
2366
__metaclass__ = AlternateDBusNamesMetaclass
2367
mandos_dbus_service = MandosDBusServiceTransitional()
2368
2369
def cleanup():
2370
"Cleanup function; run on exit"
2371
service.cleanup()
2372
2373
multiprocessing.active_children()
2374
if not (tcp_server.clients or client_settings):
2375
return
2376
2377
# Store client before exiting. Secrets are encrypted with key
2378
# based on what config file has. If config file is
2379
# removed/edited, old secret will thus be unrecovable.
2380
clients = {}
2381
with PGPEngine() as pgp:
2382
for client in tcp_server.clients.itervalues():
2383
key = client_settings[client.name]["secret"]
2384
client.encrypted_secret = pgp.encrypt(client.secret,
2385
key)
2386
client_dict = {}
2387
2388
# A list of attributes that can not be pickled
2389
# + secret.
2390
exclude = set(("bus", "changedstate", "secret",
2391
"checker"))
2392
for name, typ in (inspect.getmembers
2393
(dbus.service.Object)):
2394
exclude.add(name)
2395
2396
client_dict["encrypted_secret"] = (client
2397
.encrypted_secret)
2398
for attr in client.client_structure:
2399
if attr not in exclude:
2400
client_dict[attr] = getattr(client, attr)
2401
2402
clients[client.name] = client_dict
2403
del client_settings[client.name]["secret"]
2404
2405
try:
2406
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2407
prefix="clients-",
2408
dir=os.path.dirname
2409
(stored_state_path))
2410
with os.fdopen(tempfd, "wb") as stored_state:
2411
pickle.dump((clients, client_settings), stored_state)
2412
os.rename(tempname, stored_state_path)
2413
except (IOError, OSError) as e:
2414
logger.warning("Could not save persistent state: {0}"
2415
.format(e))
2416
if not debug:
2417
try:
2418
os.remove(tempname)
2419
except NameError:
2420
pass
2421
if e.errno not in set((errno.ENOENT, errno.EACCES,
2422
errno.EEXIST)):
2423
raise e
2424
2425
# Delete all clients, and settings from config
2426
while tcp_server.clients:
2427
name, client = tcp_server.clients.popitem()
2428
if use_dbus:
2429
client.remove_from_connection()
2430
# Don't signal anything except ClientRemoved
2431
client.disable(quiet=True)
2432
if use_dbus:
2433
# Emit D-Bus signal
2434
mandos_dbus_service.ClientRemoved(client
2435
.dbus_object_path,
2436
client.name)
2437
client_settings.clear()
2438
2439
atexit.register(cleanup)
2440
2441
for client in tcp_server.clients.itervalues():
1627
2442
if use_dbus:
1628
2443
# Emit D-Bus signal
1629
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1630
client.GetAll(u""))
1631
client.enable()
2444
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2445
# Need to initiate checking of clients
2446
if client.enabled:
2447
client.init_checker()
1632
2448
1633
2449
tcp_server.enable()
1634
2450
tcp_server.server_activate()
1636
2452
# Find out what port we got
1637
2453
service.port = tcp_server.socket.getsockname()[1]
1638
2454
if use_ipv6:
1639
logger.info(u"Now listening on address %r, port %d,"
2455
logger.info("Now listening on address %r, port %d,"
1640
2456
" flowinfo %d, scope_id %d"
1641
2457
% tcp_server.socket.getsockname())
1642
2458
else: # IPv4
1643
logger.info(u"Now listening on address %r, port %d"
2459
logger.info("Now listening on address %r, port %d"
1644
2460
% tcp_server.socket.getsockname())
1645
2461
1646
2462
#service.interface = tcp_server.socket.getsockname()[3]
1649
2465
# From the Avahi example code
1650
2466
try:
1651
2467
service.activate()
1652
except dbus.exceptions.DBusException, error:
1653
logger.critical(u"DBusException: %s", error)
2468
except dbus.exceptions.DBusException as error:
2469
logger.critical("DBusException: %s", error)
2470
cleanup()
1654
2471
sys.exit(1)
1655
2472
# End of Avahi example code
1656
2473
1659
2476
(tcp_server.handle_request
1660
2477
(*args[2:], **kwargs) or True))
1661
2478
1662
logger.debug(u"Starting main loop")
2479
logger.debug("Starting main loop")
1663
2480
main_loop.run()
1664
except AvahiError, error:
1665
logger.critical(u"AvahiError: %s", error)
2481
except AvahiError as error:
2482
logger.critical("AvahiError: %s", error)
2483
cleanup()
1666
2484
sys.exit(1)
1667
2485
except KeyboardInterrupt:
1668
2486
if debug:
1669
print >> sys.stderr
1670
logger.debug(u"Server received KeyboardInterrupt")
1671
logger.debug(u"Server exiting")
2487
print("", file=sys.stderr)
2488
logger.debug("Server received KeyboardInterrupt")
2489
logger.debug("Server exiting")
2490
# Must run before the D-Bus bus name gets deregistered
2491
cleanup()
1672
2492
1673
2493
if __name__ == '__main__':
1674
2494
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0