To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to mandos
- browse files at revision 420.1.1
- compare with another revision
- download diff
- download tarball
- view history from revision 420.1.1
- Committer: teddy at bsnet
- Date: 2010-09-10 17:06:26 UTC
- mto: This revision was merged to the branch mainline in revision 427.
- Revision ID: teddy@fukt.bsnet.se-20100910170626-exo8e7ptkb9ncg29
* Makefile (install-server): Install dbus-mandos.conf as
"/etc/dbus-1/system.d/mandos.conf".
(purge-server): Remove "/etc/dbus-1/system.d/mandos.conf".
"/etc/dbus-1/system.d/mandos.conf".
(purge-server): Remove "/etc/dbus-1/system.d/mandos.conf".
- files added:
- dbus-mandos.conf
- files modified:
- INSTALL
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
14
# Copyright © 2008,2009 Teddy Hogeborn
33
33
34
34
from __future__ import division, with_statement, absolute_import
35
35
36
import SocketServer
36
import SocketServer as socketserver
37
37
import socket
38
38
import optparse
39
39
import datetime
44
44
import gnutls.library.functions
45
45
import gnutls.library.constants
46
46
import gnutls.library.types
47
import ConfigParser
47
import ConfigParser as configparser
48
48
import sys
49
49
import re
50
50
import os
51
51
import signal
52
from sets import Set
53
52
import subprocess
54
53
import atexit
55
54
import stat
56
55
import logging
57
56
import logging.handlers
58
57
import pwd
59
from contextlib import closing
58
import contextlib
59
import struct
60
import fcntl
61
import functools
62
import cPickle as pickle
63
import select
60
64
61
65
import dbus
62
66
import dbus.service
65
69
from dbus.mainloop.glib import DBusGMainLoop
66
70
import ctypes
67
71
import ctypes.util
68
69
version = "1.0.3"
70
71
logger = logging.Logger('mandos')
72
import xml.dom.minidom
73
import inspect
74
75
try:
76
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
77
except AttributeError:
78
try:
79
from IN import SO_BINDTODEVICE
80
except ImportError:
81
SO_BINDTODEVICE = None
82
83
84
version = "1.0.14"
85
86
logger = logging.Logger(u'mandos')
72
87
syslogger = (logging.handlers.SysLogHandler
73
88
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
89
address = "/dev/log"))
75
90
syslogger.setFormatter(logging.Formatter
76
('Mandos: %(levelname)s: %(message)s'))
91
(u'Mandos [%(process)d]: %(levelname)s:'
92
u' %(message)s'))
77
93
logger.addHandler(syslogger)
78
94
79
95
console = logging.StreamHandler()
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
81
' %(message)s'))
96
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
97
u' %(levelname)s:'
98
u' %(message)s'))
82
99
logger.addHandler(console)
83
100
84
101
class AvahiError(Exception):
97
114
98
115
class AvahiService(object):
99
116
"""An Avahi (Zeroconf) service.
117
100
118
Attributes:
101
119
interface: integer; avahi.IF_UNSPEC or an interface index.
102
120
Used to optionally bind to the specified interface.
103
name: string; Example: 'Mandos'
104
type: string; Example: '_mandos._tcp'.
121
name: string; Example: u'Mandos'
122
type: string; Example: u'_mandos._tcp'.
105
123
See <http://www.dns-sd.org/ServiceTypes.html>
106
124
port: integer; what port to announce
107
125
TXT: list of strings; TXT record for the service
110
128
max_renames: integer; maximum number of renames
111
129
rename_count: integer; counter so we only rename after collisions
112
130
a sensible number of times
131
group: D-Bus Entry Group
132
server: D-Bus Server
133
bus: dbus.SystemBus()
113
134
"""
114
135
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
136
servicetype = None, port = None, TXT = None,
116
domain = "", host = "", max_renames = 32768):
137
domain = u"", host = u"", max_renames = 32768,
138
protocol = avahi.PROTO_UNSPEC, bus = None):
117
139
self.interface = interface
118
140
self.name = name
119
141
self.type = servicetype
123
145
self.host = host
124
146
self.rename_count = 0
125
147
self.max_renames = max_renames
148
self.protocol = protocol
149
self.group = None # our entry group
150
self.server = None
151
self.bus = bus
126
152
def rename(self):
127
153
"""Derived from the Avahi example code"""
128
154
if self.rename_count >= self.max_renames:
130
156
u" after %i retries, exiting.",
131
157
self.rename_count)
132
158
raise AvahiServiceError(u"Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
159
self.name = self.server.GetAlternativeServiceName(self.name)
134
160
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
161
unicode(self.name))
136
162
syslogger.setFormatter(logging.Formatter
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
163
(u'Mandos (%s) [%%(process)d]:'
164
u' %%(levelname)s: %%(message)s'
165
% self.name))
139
166
self.remove()
140
167
self.add()
141
168
self.rename_count += 1
142
169
def remove(self):
143
170
"""Derived from the Avahi example code"""
144
if group is not None:
145
group.Reset()
171
if self.group is not None:
172
self.group.Reset()
146
173
def add(self):
147
174
"""Derived from the Avahi example code"""
148
global group
149
if group is None:
150
group = dbus.Interface(bus.get_object
151
(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
175
if self.group is None:
176
self.group = dbus.Interface(
177
self.bus.get_object(avahi.DBUS_NAME,
178
self.server.EntryGroupNew()),
179
avahi.DBUS_INTERFACE_ENTRY_GROUP)
180
self.group.connect_to_signal('StateChanged',
181
self
182
.entry_group_state_changed)
156
183
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
171
172
173
def _datetime_to_dbus(dt, variant_level=0):
174
"""Convert a UTC datetime.datetime() to a D-Bus type."""
175
return dbus.String(dt.isoformat(), variant_level=variant_level)
176
177
178
class Client(dbus.service.Object):
184
self.name, self.type)
185
self.group.AddService(
186
self.interface,
187
self.protocol,
188
dbus.UInt32(0), # flags
189
self.name, self.type,
190
self.domain, self.host,
191
dbus.UInt16(self.port),
192
avahi.string_array_to_txt_array(self.TXT))
193
self.group.Commit()
194
def entry_group_state_changed(self, state, error):
195
"""Derived from the Avahi example code"""
196
logger.debug(u"Avahi entry group state change: %i", state)
197
198
if state == avahi.ENTRY_GROUP_ESTABLISHED:
199
logger.debug(u"Zeroconf service established.")
200
elif state == avahi.ENTRY_GROUP_COLLISION:
201
logger.warning(u"Zeroconf service name collision.")
202
self.rename()
203
elif state == avahi.ENTRY_GROUP_FAILURE:
204
logger.critical(u"Avahi: Error in group state changed %s",
205
unicode(error))
206
raise AvahiGroupError(u"State changed: %s"
207
% unicode(error))
208
def cleanup(self):
209
"""Derived from the Avahi example code"""
210
if self.group is not None:
211
self.group.Free()
212
self.group = None
213
def server_state_changed(self, state):
214
"""Derived from the Avahi example code"""
215
logger.debug(u"Avahi server state change: %i", state)
216
if state == avahi.SERVER_COLLISION:
217
logger.error(u"Zeroconf server name collision")
218
self.remove()
219
elif state == avahi.SERVER_RUNNING:
220
self.add()
221
def activate(self):
222
"""Derived from the Avahi example code"""
223
if self.server is None:
224
self.server = dbus.Interface(
225
self.bus.get_object(avahi.DBUS_NAME,
226
avahi.DBUS_PATH_SERVER),
227
avahi.DBUS_INTERFACE_SERVER)
228
self.server.connect_to_signal(u"StateChanged",
229
self.server_state_changed)
230
self.server_state_changed(self.server.GetState())
231
232
233
class Client(object):
179
234
"""A representation of a client host served by this server.
235
180
236
Attributes:
181
name: string; from the config file, used in log messages
237
name: string; from the config file, used in log messages and
238
D-Bus identifiers
182
239
fingerprint: string (40 or 32 hexadecimal digits); used to
183
240
uniquely identify the client
184
241
secret: bytestring; sent verbatim (over TLS) to client
188
245
enabled: bool()
189
246
last_checked_ok: datetime.datetime(); (UTC) or None
190
247
timeout: datetime.timedelta(); How long from last_checked_ok
191
until this client is invalid
248
until this client is disabled
192
249
interval: datetime.timedelta(); How often to start a new checker
193
250
disable_hook: If set, called by disable() as disable_hook(self)
194
251
checker: subprocess.Popen(); a running checker process used
195
252
to see if the client lives.
196
253
'None' if no process is running.
197
254
checker_initiator_tag: a gobject event source tag, or None
198
disable_initiator_tag: - '' -
255
disable_initiator_tag: - '' -
199
256
checker_callback_tag: - '' -
200
257
checker_command: string; External command which is run to check if
201
258
client lives. %() expansions are done at
202
259
runtime with vars(self) as dict, so that for
203
260
instance %(name)s can be used in the command.
204
use_dbus: bool(); Whether to provide D-Bus interface and signals
205
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
261
current_checker_command: string; current running checker_command
206
262
"""
263
264
@staticmethod
265
def _timedelta_to_milliseconds(td):
266
"Convert a datetime.timedelta() to milliseconds"
267
return ((td.days * 24 * 60 * 60 * 1000)
268
+ (td.seconds * 1000)
269
+ (td.microseconds // 1000))
270
207
271
def timeout_milliseconds(self):
208
272
"Return the 'timeout' attribute in milliseconds"
209
return ((self.timeout.days * 24 * 60 * 60 * 1000)
210
+ (self.timeout.seconds * 1000)
211
+ (self.timeout.microseconds // 1000))
273
return self._timedelta_to_milliseconds(self.timeout)
212
274
213
275
def interval_milliseconds(self):
214
276
"Return the 'interval' attribute in milliseconds"
215
return ((self.interval.days * 24 * 60 * 60 * 1000)
216
+ (self.interval.seconds * 1000)
217
+ (self.interval.microseconds // 1000))
277
return self._timedelta_to_milliseconds(self.interval)
218
278
219
def __init__(self, name = None, disable_hook=None, config=None,
220
use_dbus=True):
279
def __init__(self, name = None, disable_hook=None, config=None):
221
280
"""Note: the 'checker' key in 'config' sets the
222
281
'checker_command' attribute and *not* the 'checker'
223
282
attribute."""
225
284
if config is None:
226
285
config = {}
227
286
logger.debug(u"Creating client %r", self.name)
228
self.use_dbus = use_dbus
229
if self.use_dbus:
230
self.dbus_object_path = (dbus.ObjectPath
231
("/Mandos/clients/"
232
+ self.name.replace(".", "_")))
233
dbus.service.Object.__init__(self, bus,
234
self.dbus_object_path)
235
287
# Uppercase and remove spaces from fingerprint for later
236
288
# comparison purposes with return value from the fingerprint()
237
289
# function
238
self.fingerprint = (config["fingerprint"].upper()
290
self.fingerprint = (config[u"fingerprint"].upper()
239
291
.replace(u" ", u""))
240
292
logger.debug(u" Fingerprint: %s", self.fingerprint)
241
if "secret" in config:
242
self.secret = config["secret"].decode(u"base64")
243
elif "secfile" in config:
244
with closing(open(os.path.expanduser
245
(os.path.expandvars
246
(config["secfile"])))) as secfile:
293
if u"secret" in config:
294
self.secret = config[u"secret"].decode(u"base64")
295
elif u"secfile" in config:
296
with open(os.path.expanduser(os.path.expandvars
297
(config[u"secfile"])),
298
"rb") as secfile:
247
299
self.secret = secfile.read()
248
300
else:
249
301
raise TypeError(u"No secret or secfile for client %s"
250
302
% self.name)
251
self.host = config.get("host", "")
303
self.host = config.get(u"host", u"")
252
304
self.created = datetime.datetime.utcnow()
253
305
self.enabled = False
254
306
self.last_enabled = None
255
307
self.last_checked_ok = None
256
self.timeout = string_to_delta(config["timeout"])
257
self.interval = string_to_delta(config["interval"])
308
self.timeout = string_to_delta(config[u"timeout"])
309
self.interval = string_to_delta(config[u"interval"])
258
310
self.disable_hook = disable_hook
259
311
self.checker = None
260
312
self.checker_initiator_tag = None
261
313
self.disable_initiator_tag = None
262
314
self.checker_callback_tag = None
263
self.checker_command = config["checker"]
315
self.checker_command = config[u"checker"]
316
self.current_checker_command = None
317
self.last_connect = None
264
318
265
319
def enable(self):
266
320
"""Start this client's checker and timeout hooks"""
321
if getattr(self, u"enabled", False):
322
# Already enabled
323
return
267
324
self.last_enabled = datetime.datetime.utcnow()
268
325
# Schedule a new checker to be started an 'interval' from now,
269
326
# and every interval from then on.
270
327
self.checker_initiator_tag = (gobject.timeout_add
271
328
(self.interval_milliseconds(),
272
329
self.start_checker))
273
# Also start a new checker *right now*.
274
self.start_checker()
275
330
# Schedule a disable() when 'timeout' has passed
276
331
self.disable_initiator_tag = (gobject.timeout_add
277
332
(self.timeout_milliseconds(),
278
333
self.disable))
279
334
self.enabled = True
280
if self.use_dbus:
281
# Emit D-Bus signals
282
self.PropertyChanged(dbus.String(u"enabled"),
283
dbus.Boolean(True, variant_level=1))
284
self.PropertyChanged(dbus.String(u"last_enabled"),
285
(_datetime_to_dbus(self.last_enabled,
286
variant_level=1)))
335
# Also start a new checker *right now*.
336
self.start_checker()
287
337
288
def disable(self):
338
def disable(self, quiet=True):
289
339
"""Disable this client."""
290
340
if not getattr(self, "enabled", False):
291
341
return False
292
logger.info(u"Disabling client %s", self.name)
293
if getattr(self, "disable_initiator_tag", False):
342
if not quiet:
343
logger.info(u"Disabling client %s", self.name)
344
if getattr(self, u"disable_initiator_tag", False):
294
345
gobject.source_remove(self.disable_initiator_tag)
295
346
self.disable_initiator_tag = None
296
if getattr(self, "checker_initiator_tag", False):
347
if getattr(self, u"checker_initiator_tag", False):
297
348
gobject.source_remove(self.checker_initiator_tag)
298
349
self.checker_initiator_tag = None
299
350
self.stop_checker()
300
351
if self.disable_hook:
301
352
self.disable_hook(self)
302
353
self.enabled = False
303
if self.use_dbus:
304
# Emit D-Bus signal
305
self.PropertyChanged(dbus.String(u"enabled"),
306
dbus.Boolean(False, variant_level=1))
307
354
# Do not run this again if called by a gobject.timeout_add
308
355
return False
309
356
315
362
"""The checker has completed, so take appropriate actions."""
316
363
self.checker_callback_tag = None
317
364
self.checker = None
318
if self.use_dbus:
319
# Emit D-Bus signal
320
self.PropertyChanged(dbus.String(u"checker_running"),
321
dbus.Boolean(False, variant_level=1))
322
if (os.WIFEXITED(condition)
323
and (os.WEXITSTATUS(condition) == 0)):
324
logger.info(u"Checker for %(name)s succeeded",
325
vars(self))
326
if self.use_dbus:
327
# Emit D-Bus signal
328
self.CheckerCompleted(dbus.Boolean(True),
329
dbus.UInt16(condition),
330
dbus.String(command))
331
self.bump_timeout()
332
elif not os.WIFEXITED(condition):
365
if os.WIFEXITED(condition):
366
exitstatus = os.WEXITSTATUS(condition)
367
if exitstatus == 0:
368
logger.info(u"Checker for %(name)s succeeded",
369
vars(self))
370
self.checked_ok()
371
else:
372
logger.info(u"Checker for %(name)s failed",
373
vars(self))
374
else:
333
375
logger.warning(u"Checker for %(name)s crashed?",
334
376
vars(self))
335
if self.use_dbus:
336
# Emit D-Bus signal
337
self.CheckerCompleted(dbus.Boolean(False),
338
dbus.UInt16(condition),
339
dbus.String(command))
340
else:
341
logger.info(u"Checker for %(name)s failed",
342
vars(self))
343
if self.use_dbus:
344
# Emit D-Bus signal
345
self.CheckerCompleted(dbus.Boolean(False),
346
dbus.UInt16(condition),
347
dbus.String(command))
348
377
349
def bump_timeout(self):
378
def checked_ok(self):
350
379
"""Bump up the timeout for this client.
380
351
381
This should only be called when the client has been seen,
352
382
alive and well.
353
383
"""
356
386
self.disable_initiator_tag = (gobject.timeout_add
357
387
(self.timeout_milliseconds(),
358
388
self.disable))
359
if self.use_dbus:
360
# Emit D-Bus signal
361
self.PropertyChanged(
362
dbus.String(u"last_checked_ok"),
363
(_datetime_to_dbus(self.last_checked_ok,
364
variant_level=1)))
365
389
366
390
def start_checker(self):
367
391
"""Start a new checker subprocess if one is not running.
392
368
393
If a checker already exists, leave it running and do
369
394
nothing."""
370
395
# The reason for not killing a running checker is that if we
373
398
# client would inevitably timeout, since no checker would get
374
399
# a chance to run to completion. If we instead leave running
375
400
# checkers alone, the checker would have to take more time
376
# than 'timeout' for the client to be declared invalid, which
377
# is as it should be.
401
# than 'timeout' for the client to be disabled, which is as it
402
# should be.
403
404
# If a checker exists, make sure it is not a zombie
405
try:
406
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
407
except (AttributeError, OSError), error:
408
if (isinstance(error, OSError)
409
and error.errno != errno.ECHILD):
410
raise error
411
else:
412
if pid:
413
logger.warning(u"Checker was a zombie")
414
gobject.source_remove(self.checker_callback_tag)
415
self.checker_callback(pid, status,
416
self.current_checker_command)
417
# Start a new checker if needed
378
418
if self.checker is None:
379
419
try:
380
420
# In case checker_command has exactly one % operator
381
421
command = self.checker_command % self.host
382
422
except TypeError:
383
423
# Escape attributes for the shell
384
escaped_attrs = dict((key, re.escape(str(val)))
424
escaped_attrs = dict((key,
425
re.escape(unicode(str(val),
426
errors=
427
u'replace')))
385
428
for key, val in
386
429
vars(self).iteritems())
387
430
try:
390
433
logger.error(u'Could not format string "%s":'
391
434
u' %s', self.checker_command, error)
392
435
return True # Try again later
436
self.current_checker_command = command
393
437
try:
394
438
logger.info(u"Starting checker %r for %s",
395
439
command, self.name)
399
443
# always replaced by /dev/null.)
400
444
self.checker = subprocess.Popen(command,
401
445
close_fds=True,
402
shell=True, cwd="/")
403
if self.use_dbus:
404
# Emit D-Bus signal
405
self.CheckerStarted(command)
406
self.PropertyChanged(
407
dbus.String("checker_running"),
408
dbus.Boolean(True, variant_level=1))
446
shell=True, cwd=u"/")
409
447
self.checker_callback_tag = (gobject.child_watch_add
410
448
(self.checker.pid,
411
449
self.checker_callback,
412
450
data=command))
451
# The checker may have completed before the gobject
452
# watch was added. Check for this.
453
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
454
if pid:
455
gobject.source_remove(self.checker_callback_tag)
456
self.checker_callback(pid, status, command)
413
457
except OSError, error:
414
458
logger.error(u"Failed to start subprocess: %s",
415
459
error)
421
465
if self.checker_callback_tag:
422
466
gobject.source_remove(self.checker_callback_tag)
423
467
self.checker_callback_tag = None
424
if getattr(self, "checker", None) is None:
468
if getattr(self, u"checker", None) is None:
425
469
return
426
470
logger.debug(u"Stopping checker for %(name)s", vars(self))
427
471
try:
428
472
os.kill(self.checker.pid, signal.SIGTERM)
429
#os.sleep(0.5)
473
#time.sleep(0.5)
430
474
#if self.checker.poll() is None:
431
475
# os.kill(self.checker.pid, signal.SIGKILL)
432
476
except OSError, error:
433
477
if error.errno != errno.ESRCH: # No such process
434
478
raise
435
479
self.checker = None
436
if self.use_dbus:
480
481
482
def dbus_service_property(dbus_interface, signature=u"v",
483
access=u"readwrite", byte_arrays=False):
484
"""Decorators for marking methods of a DBusObjectWithProperties to
485
become properties on the D-Bus.
486
487
The decorated method will be called with no arguments by "Get"
488
and with one argument by "Set".
489
490
The parameters, where they are supported, are the same as
491
dbus.service.method, except there is only "signature", since the
492
type from Get() and the type sent to Set() is the same.
493
"""
494
# Encoding deeply encoded byte arrays is not supported yet by the
495
# "Set" method, so we fail early here:
496
if byte_arrays and signature != u"ay":
497
raise ValueError(u"Byte arrays not supported for non-'ay'"
498
u" signature %r" % signature)
499
def decorator(func):
500
func._dbus_is_property = True
501
func._dbus_interface = dbus_interface
502
func._dbus_signature = signature
503
func._dbus_access = access
504
func._dbus_name = func.__name__
505
if func._dbus_name.endswith(u"_dbus_property"):
506
func._dbus_name = func._dbus_name[:-14]
507
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
508
return func
509
return decorator
510
511
512
class DBusPropertyException(dbus.exceptions.DBusException):
513
"""A base class for D-Bus property-related exceptions
514
"""
515
def __unicode__(self):
516
return unicode(str(self))
517
518
519
class DBusPropertyAccessException(DBusPropertyException):
520
"""A property's access permissions disallows an operation.
521
"""
522
pass
523
524
525
class DBusPropertyNotFound(DBusPropertyException):
526
"""An attempt was made to access a non-existing property.
527
"""
528
pass
529
530
531
class DBusObjectWithProperties(dbus.service.Object):
532
"""A D-Bus object with properties.
533
534
Classes inheriting from this can use the dbus_service_property
535
decorator to expose methods as D-Bus properties. It exposes the
536
standard Get(), Set(), and GetAll() methods on the D-Bus.
537
"""
538
539
@staticmethod
540
def _is_dbus_property(obj):
541
return getattr(obj, u"_dbus_is_property", False)
542
543
def _get_all_dbus_properties(self):
544
"""Returns a generator of (name, attribute) pairs
545
"""
546
return ((prop._dbus_name, prop)
547
for name, prop in
548
inspect.getmembers(self, self._is_dbus_property))
549
550
def _get_dbus_property(self, interface_name, property_name):
551
"""Returns a bound method if one exists which is a D-Bus
552
property with the specified name and interface.
553
"""
554
for name in (property_name,
555
property_name + u"_dbus_property"):
556
prop = getattr(self, name, None)
557
if (prop is None
558
or not self._is_dbus_property(prop)
559
or prop._dbus_name != property_name
560
or (interface_name and prop._dbus_interface
561
and interface_name != prop._dbus_interface)):
562
continue
563
return prop
564
# No such property
565
raise DBusPropertyNotFound(self.dbus_object_path + u":"
566
+ interface_name + u"."
567
+ property_name)
568
569
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
570
out_signature=u"v")
571
def Get(self, interface_name, property_name):
572
"""Standard D-Bus property Get() method, see D-Bus standard.
573
"""
574
prop = self._get_dbus_property(interface_name, property_name)
575
if prop._dbus_access == u"write":
576
raise DBusPropertyAccessException(property_name)
577
value = prop()
578
if not hasattr(value, u"variant_level"):
579
return value
580
return type(value)(value, variant_level=value.variant_level+1)
581
582
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
583
def Set(self, interface_name, property_name, value):
584
"""Standard D-Bus property Set() method, see D-Bus standard.
585
"""
586
prop = self._get_dbus_property(interface_name, property_name)
587
if prop._dbus_access == u"read":
588
raise DBusPropertyAccessException(property_name)
589
if prop._dbus_get_args_options[u"byte_arrays"]:
590
# The byte_arrays option is not supported yet on
591
# signatures other than "ay".
592
if prop._dbus_signature != u"ay":
593
raise ValueError
594
value = dbus.ByteArray(''.join(unichr(byte)
595
for byte in value))
596
prop(value)
597
598
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
599
out_signature=u"a{sv}")
600
def GetAll(self, interface_name):
601
"""Standard D-Bus property GetAll() method, see D-Bus
602
standard.
603
604
Note: Will not include properties with access="write".
605
"""
606
all = {}
607
for name, prop in self._get_all_dbus_properties():
608
if (interface_name
609
and interface_name != prop._dbus_interface):
610
# Interface non-empty but did not match
611
continue
612
# Ignore write-only properties
613
if prop._dbus_access == u"write":
614
continue
615
value = prop()
616
if not hasattr(value, u"variant_level"):
617
all[name] = value
618
continue
619
all[name] = type(value)(value, variant_level=
620
value.variant_level+1)
621
return dbus.Dictionary(all, signature=u"sv")
622
623
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
624
out_signature=u"s",
625
path_keyword='object_path',
626
connection_keyword='connection')
627
def Introspect(self, object_path, connection):
628
"""Standard D-Bus method, overloaded to insert property tags.
629
"""
630
xmlstring = dbus.service.Object.Introspect(self, object_path,
631
connection)
632
try:
633
document = xml.dom.minidom.parseString(xmlstring)
634
def make_tag(document, name, prop):
635
e = document.createElement(u"property")
636
e.setAttribute(u"name", name)
637
e.setAttribute(u"type", prop._dbus_signature)
638
e.setAttribute(u"access", prop._dbus_access)
639
return e
640
for if_tag in document.getElementsByTagName(u"interface"):
641
for tag in (make_tag(document, name, prop)
642
for name, prop
643
in self._get_all_dbus_properties()
644
if prop._dbus_interface
645
== if_tag.getAttribute(u"name")):
646
if_tag.appendChild(tag)
647
# Add the names to the return values for the
648
# "org.freedesktop.DBus.Properties" methods
649
if (if_tag.getAttribute(u"name")
650
== u"org.freedesktop.DBus.Properties"):
651
for cn in if_tag.getElementsByTagName(u"method"):
652
if cn.getAttribute(u"name") == u"Get":
653
for arg in cn.getElementsByTagName(u"arg"):
654
if (arg.getAttribute(u"direction")
655
== u"out"):
656
arg.setAttribute(u"name", u"value")
657
elif cn.getAttribute(u"name") == u"GetAll":
658
for arg in cn.getElementsByTagName(u"arg"):
659
if (arg.getAttribute(u"direction")
660
== u"out"):
661
arg.setAttribute(u"name", u"props")
662
xmlstring = document.toxml(u"utf-8")
663
document.unlink()
664
except (AttributeError, xml.dom.DOMException,
665
xml.parsers.expat.ExpatError), error:
666
logger.error(u"Failed to override Introspection method",
667
error)
668
return xmlstring
669
670
671
class ClientDBus(Client, DBusObjectWithProperties):
672
"""A Client class using D-Bus
673
674
Attributes:
675
dbus_object_path: dbus.ObjectPath
676
bus: dbus.SystemBus()
677
"""
678
# dbus.service.Object doesn't use super(), so we can't either.
679
680
def __init__(self, bus = None, *args, **kwargs):
681
self.bus = bus
682
Client.__init__(self, *args, **kwargs)
683
# Only now, when this client is initialized, can it show up on
684
# the D-Bus
685
self.dbus_object_path = (dbus.ObjectPath
686
(u"/clients/"
687
+ self.name.replace(u".", u"_")))
688
DBusObjectWithProperties.__init__(self, self.bus,
689
self.dbus_object_path)
690
691
@staticmethod
692
def _datetime_to_dbus(dt, variant_level=0):
693
"""Convert a UTC datetime.datetime() to a D-Bus type."""
694
return dbus.String(dt.isoformat(),
695
variant_level=variant_level)
696
697
def enable(self):
698
oldstate = getattr(self, u"enabled", False)
699
r = Client.enable(self)
700
if oldstate != self.enabled:
701
# Emit D-Bus signals
702
self.PropertyChanged(dbus.String(u"enabled"),
703
dbus.Boolean(True, variant_level=1))
704
self.PropertyChanged(
705
dbus.String(u"last_enabled"),
706
self._datetime_to_dbus(self.last_enabled,
707
variant_level=1))
708
return r
709
710
def disable(self, quiet = False):
711
oldstate = getattr(self, u"enabled", False)
712
r = Client.disable(self, quiet=quiet)
713
if not quiet and oldstate != self.enabled:
714
# Emit D-Bus signal
715
self.PropertyChanged(dbus.String(u"enabled"),
716
dbus.Boolean(False, variant_level=1))
717
return r
718
719
def __del__(self, *args, **kwargs):
720
try:
721
self.remove_from_connection()
722
except LookupError:
723
pass
724
if hasattr(DBusObjectWithProperties, u"__del__"):
725
DBusObjectWithProperties.__del__(self, *args, **kwargs)
726
Client.__del__(self, *args, **kwargs)
727
728
def checker_callback(self, pid, condition, command,
729
*args, **kwargs):
730
self.checker_callback_tag = None
731
self.checker = None
732
# Emit D-Bus signal
733
self.PropertyChanged(dbus.String(u"checker_running"),
734
dbus.Boolean(False, variant_level=1))
735
if os.WIFEXITED(condition):
736
exitstatus = os.WEXITSTATUS(condition)
737
# Emit D-Bus signal
738
self.CheckerCompleted(dbus.Int16(exitstatus),
739
dbus.Int64(condition),
740
dbus.String(command))
741
else:
742
# Emit D-Bus signal
743
self.CheckerCompleted(dbus.Int16(-1),
744
dbus.Int64(condition),
745
dbus.String(command))
746
747
return Client.checker_callback(self, pid, condition, command,
748
*args, **kwargs)
749
750
def checked_ok(self, *args, **kwargs):
751
r = Client.checked_ok(self, *args, **kwargs)
752
# Emit D-Bus signal
753
self.PropertyChanged(
754
dbus.String(u"last_checked_ok"),
755
(self._datetime_to_dbus(self.last_checked_ok,
756
variant_level=1)))
757
return r
758
759
def start_checker(self, *args, **kwargs):
760
old_checker = self.checker
761
if self.checker is not None:
762
old_checker_pid = self.checker.pid
763
else:
764
old_checker_pid = None
765
r = Client.start_checker(self, *args, **kwargs)
766
# Only if new checker process was started
767
if (self.checker is not None
768
and old_checker_pid != self.checker.pid):
769
# Emit D-Bus signal
770
self.CheckerStarted(self.current_checker_command)
771
self.PropertyChanged(
772
dbus.String(u"checker_running"),
773
dbus.Boolean(True, variant_level=1))
774
return r
775
776
def stop_checker(self, *args, **kwargs):
777
old_checker = getattr(self, u"checker", None)
778
r = Client.stop_checker(self, *args, **kwargs)
779
if (old_checker is not None
780
and getattr(self, u"checker", None) is None):
437
781
self.PropertyChanged(dbus.String(u"checker_running"),
438
782
dbus.Boolean(False, variant_level=1))
439
440
def still_valid(self):
441
"""Has the timeout not yet passed for this client?"""
442
if not getattr(self, "enabled", False):
443
return False
444
now = datetime.datetime.utcnow()
445
if self.last_checked_ok is None:
446
return now < (self.created + self.timeout)
447
else:
448
return now < (self.last_checked_ok + self.timeout)
449
450
## D-Bus methods & signals
451
_interface = u"org.mandos_system.Mandos.Client"
452
453
# BumpTimeout - method
454
BumpTimeout = dbus.service.method(_interface)(bump_timeout)
455
BumpTimeout.__name__ = "BumpTimeout"
783
return r
784
785
## D-Bus methods, signals & properties
786
_interface = u"se.bsnet.fukt.Mandos.Client"
787
788
## Signals
456
789
457
790
# CheckerCompleted - signal
458
@dbus.service.signal(_interface, signature="bqs")
459
def CheckerCompleted(self, success, condition, command):
791
@dbus.service.signal(_interface, signature=u"nxs")
792
def CheckerCompleted(self, exitcode, waitstatus, command):
460
793
"D-Bus signal"
461
794
pass
462
795
463
796
# CheckerStarted - signal
464
@dbus.service.signal(_interface, signature="s")
797
@dbus.service.signal(_interface, signature=u"s")
465
798
def CheckerStarted(self, command):
466
799
"D-Bus signal"
467
800
pass
468
801
469
# GetAllProperties - method
470
@dbus.service.method(_interface, out_signature="a{sv}")
471
def GetAllProperties(self):
472
"D-Bus method"
473
return dbus.Dictionary({
474
dbus.String("name"):
475
dbus.String(self.name, variant_level=1),
476
dbus.String("fingerprint"):
477
dbus.String(self.fingerprint, variant_level=1),
478
dbus.String("host"):
479
dbus.String(self.host, variant_level=1),
480
dbus.String("created"):
481
_datetime_to_dbus(self.created, variant_level=1),
482
dbus.String("last_enabled"):
483
(_datetime_to_dbus(self.last_enabled,
484
variant_level=1)
485
if self.last_enabled is not None
486
else dbus.Boolean(False, variant_level=1)),
487
dbus.String("enabled"):
488
dbus.Boolean(self.enabled, variant_level=1),
489
dbus.String("last_checked_ok"):
490
(_datetime_to_dbus(self.last_checked_ok,
491
variant_level=1)
492
if self.last_checked_ok is not None
493
else dbus.Boolean (False, variant_level=1)),
494
dbus.String("timeout"):
495
dbus.UInt64(self.timeout_milliseconds(),
496
variant_level=1),
497
dbus.String("interval"):
498
dbus.UInt64(self.interval_milliseconds(),
499
variant_level=1),
500
dbus.String("checker"):
501
dbus.String(self.checker_command,
502
variant_level=1),
503
dbus.String("checker_running"):
504
dbus.Boolean(self.checker is not None,
505
variant_level=1),
506
}, signature="sv")
507
508
# IsStillValid - method
509
IsStillValid = (dbus.service.method(_interface, out_signature="b")
510
(still_valid))
511
IsStillValid.__name__ = "IsStillValid"
512
513
802
# PropertyChanged - signal
514
@dbus.service.signal(_interface, signature="sv")
803
@dbus.service.signal(_interface, signature=u"sv")
515
804
def PropertyChanged(self, property, value):
516
805
"D-Bus signal"
517
806
pass
518
807
519
# SetChecker - method
520
@dbus.service.method(_interface, in_signature="s")
521
def SetChecker(self, checker):
522
"D-Bus setter method"
523
self.checker_command = checker
524
# Emit D-Bus signal
525
self.PropertyChanged(dbus.String(u"checker"),
526
dbus.String(self.checker_command,
527
variant_level=1))
528
529
# SetHost - method
530
@dbus.service.method(_interface, in_signature="s")
531
def SetHost(self, host):
532
"D-Bus setter method"
533
self.host = host
534
# Emit D-Bus signal
535
self.PropertyChanged(dbus.String(u"host"),
536
dbus.String(self.host, variant_level=1))
537
538
# SetInterval - method
539
@dbus.service.method(_interface, in_signature="t")
540
def SetInterval(self, milliseconds):
541
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
542
# Emit D-Bus signal
543
self.PropertyChanged(dbus.String(u"interval"),
544
(dbus.UInt64(self.interval_milliseconds(),
545
variant_level=1)))
546
547
# SetSecret - method
548
@dbus.service.method(_interface, in_signature="ay",
549
byte_arrays=True)
550
def SetSecret(self, secret):
551
"D-Bus setter method"
552
self.secret = str(secret)
553
554
# SetTimeout - method
555
@dbus.service.method(_interface, in_signature="t")
556
def SetTimeout(self, milliseconds):
557
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
558
# Emit D-Bus signal
559
self.PropertyChanged(dbus.String(u"timeout"),
560
(dbus.UInt64(self.timeout_milliseconds(),
561
variant_level=1)))
808
# GotSecret - signal
809
@dbus.service.signal(_interface)
810
def GotSecret(self):
811
"D-Bus signal"
812
pass
813
814
# Rejected - signal
815
@dbus.service.signal(_interface)
816
def Rejected(self):
817
"D-Bus signal"
818
pass
819
820
## Methods
821
822
# CheckedOK - method
823
@dbus.service.method(_interface)
824
def CheckedOK(self):
825
return self.checked_ok()
562
826
563
827
# Enable - method
564
Enable = dbus.service.method(_interface)(enable)
565
Enable.__name__ = "Enable"
828
@dbus.service.method(_interface)
829
def Enable(self):
830
"D-Bus method"
831
self.enable()
566
832
567
833
# StartChecker - method
568
834
@dbus.service.method(_interface)
577
843
self.disable()
578
844
579
845
# StopChecker - method
580
StopChecker = dbus.service.method(_interface)(stop_checker)
581
StopChecker.__name__ = "StopChecker"
846
@dbus.service.method(_interface)
847
def StopChecker(self):
848
self.stop_checker()
849
850
## Properties
851
852
# name - property
853
@dbus_service_property(_interface, signature=u"s", access=u"read")
854
def name_dbus_property(self):
855
return dbus.String(self.name)
856
857
# fingerprint - property
858
@dbus_service_property(_interface, signature=u"s", access=u"read")
859
def fingerprint_dbus_property(self):
860
return dbus.String(self.fingerprint)
861
862
# host - property
863
@dbus_service_property(_interface, signature=u"s",
864
access=u"readwrite")
865
def host_dbus_property(self, value=None):
866
if value is None: # get
867
return dbus.String(self.host)
868
self.host = value
869
# Emit D-Bus signal
870
self.PropertyChanged(dbus.String(u"host"),
871
dbus.String(value, variant_level=1))
872
873
# created - property
874
@dbus_service_property(_interface, signature=u"s", access=u"read")
875
def created_dbus_property(self):
876
return dbus.String(self._datetime_to_dbus(self.created))
877
878
# last_enabled - property
879
@dbus_service_property(_interface, signature=u"s", access=u"read")
880
def last_enabled_dbus_property(self):
881
if self.last_enabled is None:
882
return dbus.String(u"")
883
return dbus.String(self._datetime_to_dbus(self.last_enabled))
884
885
# enabled - property
886
@dbus_service_property(_interface, signature=u"b",
887
access=u"readwrite")
888
def enabled_dbus_property(self, value=None):
889
if value is None: # get
890
return dbus.Boolean(self.enabled)
891
if value:
892
self.enable()
893
else:
894
self.disable()
895
896
# last_checked_ok - property
897
@dbus_service_property(_interface, signature=u"s",
898
access=u"readwrite")
899
def last_checked_ok_dbus_property(self, value=None):
900
if value is not None:
901
self.checked_ok()
902
return
903
if self.last_checked_ok is None:
904
return dbus.String(u"")
905
return dbus.String(self._datetime_to_dbus(self
906
.last_checked_ok))
907
908
# timeout - property
909
@dbus_service_property(_interface, signature=u"t",
910
access=u"readwrite")
911
def timeout_dbus_property(self, value=None):
912
if value is None: # get
913
return dbus.UInt64(self.timeout_milliseconds())
914
self.timeout = datetime.timedelta(0, 0, 0, value)
915
# Emit D-Bus signal
916
self.PropertyChanged(dbus.String(u"timeout"),
917
dbus.UInt64(value, variant_level=1))
918
if getattr(self, u"disable_initiator_tag", None) is None:
919
return
920
# Reschedule timeout
921
gobject.source_remove(self.disable_initiator_tag)
922
self.disable_initiator_tag = None
923
time_to_die = (self.
924
_timedelta_to_milliseconds((self
925
.last_checked_ok
926
+ self.timeout)
927
- datetime.datetime
928
.utcnow()))
929
if time_to_die <= 0:
930
# The timeout has passed
931
self.disable()
932
else:
933
self.disable_initiator_tag = (gobject.timeout_add
934
(time_to_die, self.disable))
935
936
# interval - property
937
@dbus_service_property(_interface, signature=u"t",
938
access=u"readwrite")
939
def interval_dbus_property(self, value=None):
940
if value is None: # get
941
return dbus.UInt64(self.interval_milliseconds())
942
self.interval = datetime.timedelta(0, 0, 0, value)
943
# Emit D-Bus signal
944
self.PropertyChanged(dbus.String(u"interval"),
945
dbus.UInt64(value, variant_level=1))
946
if getattr(self, u"checker_initiator_tag", None) is None:
947
return
948
# Reschedule checker run
949
gobject.source_remove(self.checker_initiator_tag)
950
self.checker_initiator_tag = (gobject.timeout_add
951
(value, self.start_checker))
952
self.start_checker() # Start one now, too
953
954
# checker - property
955
@dbus_service_property(_interface, signature=u"s",
956
access=u"readwrite")
957
def checker_dbus_property(self, value=None):
958
if value is None: # get
959
return dbus.String(self.checker_command)
960
self.checker_command = value
961
# Emit D-Bus signal
962
self.PropertyChanged(dbus.String(u"checker"),
963
dbus.String(self.checker_command,
964
variant_level=1))
965
966
# checker_running - property
967
@dbus_service_property(_interface, signature=u"b",
968
access=u"readwrite")
969
def checker_running_dbus_property(self, value=None):
970
if value is None: # get
971
return dbus.Boolean(self.checker is not None)
972
if value:
973
self.start_checker()
974
else:
975
self.stop_checker()
976
977
# object_path - property
978
@dbus_service_property(_interface, signature=u"o", access=u"read")
979
def object_path_dbus_property(self):
980
return self.dbus_object_path # is already a dbus.ObjectPath
981
982
# secret = property
983
@dbus_service_property(_interface, signature=u"ay",
984
access=u"write", byte_arrays=True)
985
def secret_dbus_property(self, value):
986
self.secret = str(value)
582
987
583
988
del _interface
584
989
585
990
586
def peer_certificate(session):
587
"Return the peer's OpenPGP certificate as a bytestring"
588
# If not an OpenPGP certificate...
589
if (gnutls.library.functions
590
.gnutls_certificate_type_get(session._c_object)
591
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
592
# ...do the normal thing
593
return session.peer_certificate
594
list_size = ctypes.c_uint()
595
cert_list = (gnutls.library.functions
596
.gnutls_certificate_get_peers
597
(session._c_object, ctypes.byref(list_size)))
598
if list_size.value == 0:
599
return None
600
cert = cert_list[0]
601
return ctypes.string_at(cert.data, cert.size)
602
603
604
def fingerprint(openpgp):
605
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
606
# New GnuTLS "datum" with the OpenPGP public key
607
datum = (gnutls.library.types
608
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
609
ctypes.POINTER
610
(ctypes.c_ubyte)),
611
ctypes.c_uint(len(openpgp))))
612
# New empty GnuTLS certificate
613
crt = gnutls.library.types.gnutls_openpgp_crt_t()
614
(gnutls.library.functions
615
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
616
# Import the OpenPGP public key into the certificate
617
(gnutls.library.functions
618
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
619
gnutls.library.constants
620
.GNUTLS_OPENPGP_FMT_RAW))
621
# Verify the self signature in the key
622
crtverify = ctypes.c_uint()
623
(gnutls.library.functions
624
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
625
if crtverify.value != 0:
626
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
627
raise gnutls.errors.CertificateSecurityError("Verify failed")
628
# New buffer for the fingerprint
629
buf = ctypes.create_string_buffer(20)
630
buf_len = ctypes.c_size_t()
631
# Get the fingerprint from the certificate into the buffer
632
(gnutls.library.functions
633
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
634
ctypes.byref(buf_len)))
635
# Deinit the certificate
636
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
637
# Convert the buffer to a Python bytestring
638
fpr = ctypes.string_at(buf, buf_len.value)
639
# Convert the bytestring to hexadecimal notation
640
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
641
return hex_fpr
642
643
644
class TCP_handler(SocketServer.BaseRequestHandler, object):
645
"""A TCP request handler class.
646
Instantiated by IPv6_TCPServer for each request to handle it.
991
class ClientHandler(socketserver.BaseRequestHandler, object):
992
"""A class to handle client connections.
993
994
Instantiated once for each connection to handle it.
647
995
Note: This will run in its own forked process."""
648
996
649
997
def handle(self):
650
998
logger.info(u"TCP connection from: %s",
651
999
unicode(self.client_address))
652
session = (gnutls.connection
653
.ClientSession(self.request,
654
gnutls.connection
655
.X509Credentials()))
656
657
line = self.request.makefile().readline()
658
logger.debug(u"Protocol version: %r", line)
659
try:
660
if int(line.strip().split()[0]) > 1:
661
raise RuntimeError
662
except (ValueError, IndexError, RuntimeError), error:
663
logger.error(u"Unknown protocol version: %s", error)
664
return
665
666
# Note: gnutls.connection.X509Credentials is really a generic
667
# GnuTLS certificate credentials object so long as no X.509
668
# keys are added to it. Therefore, we can use it here despite
669
# using OpenPGP certificates.
670
671
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
672
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
673
# "+DHE-DSS"))
674
# Use a fallback default, since this MUST be set.
675
priority = self.server.settings.get("priority", "NORMAL")
676
(gnutls.library.functions
677
.gnutls_priority_set_direct(session._c_object,
678
priority, None))
679
680
try:
681
session.handshake()
682
except gnutls.errors.GNUTLSError, error:
683
logger.warning(u"Handshake failed: %s", error)
684
# Do not run session.bye() here: the session is not
685
# established. Just abandon the request.
686
return
687
try:
688
fpr = fingerprint(peer_certificate(session))
689
except (TypeError, gnutls.errors.GNUTLSError), error:
690
logger.warning(u"Bad certificate: %s", error)
691
session.bye()
692
return
693
logger.debug(u"Fingerprint: %s", fpr)
694
for c in self.server.clients:
695
if c.fingerprint == fpr:
696
client = c
697
break
698
else:
699
logger.warning(u"Client not found for fingerprint: %s",
700
fpr)
701
session.bye()
702
return
703
# Have to check if client.still_valid(), since it is possible
704
# that the client timed out while establishing the GnuTLS
705
# session.
706
if not client.still_valid():
707
logger.warning(u"Client %(name)s is invalid",
708
vars(client))
709
session.bye()
710
return
711
## This won't work here, since we're in a fork.
712
# client.bump_timeout()
713
sent_size = 0
714
while sent_size < len(client.secret):
715
sent = session.send(client.secret[sent_size:])
716
logger.debug(u"Sent: %d, remaining: %d",
717
sent, len(client.secret)
718
- (sent_size + sent))
719
sent_size += sent
720
session.bye()
721
722
723
class IPv6_TCPServer(SocketServer.ForkingMixIn,
724
SocketServer.TCPServer, object):
725
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1000
logger.debug(u"IPC Pipe FD: %d",
1001
self.server.child_pipe[1].fileno())
1002
# Open IPC pipe to parent process
1003
with contextlib.nested(self.server.child_pipe[1],
1004
self.server.parent_pipe[0]
1005
) as (ipc, ipc_return):
1006
session = (gnutls.connection
1007
.ClientSession(self.request,
1008
gnutls.connection
1009
.X509Credentials()))
1010
1011
# Note: gnutls.connection.X509Credentials is really a
1012
# generic GnuTLS certificate credentials object so long as
1013
# no X.509 keys are added to it. Therefore, we can use it
1014
# here despite using OpenPGP certificates.
1015
1016
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1017
# u"+AES-256-CBC", u"+SHA1",
1018
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1019
# u"+DHE-DSS"))
1020
# Use a fallback default, since this MUST be set.
1021
priority = self.server.gnutls_priority
1022
if priority is None:
1023
priority = u"NORMAL"
1024
(gnutls.library.functions
1025
.gnutls_priority_set_direct(session._c_object,
1026
priority, None))
1027
1028
# Start communication using the Mandos protocol
1029
# Get protocol number
1030
line = self.request.makefile().readline()
1031
logger.debug(u"Protocol version: %r", line)
1032
try:
1033
if int(line.strip().split()[0]) > 1:
1034
raise RuntimeError
1035
except (ValueError, IndexError, RuntimeError), error:
1036
logger.error(u"Unknown protocol version: %s", error)
1037
return
1038
1039
# Start GnuTLS connection
1040
try:
1041
session.handshake()
1042
except gnutls.errors.GNUTLSError, error:
1043
logger.warning(u"Handshake failed: %s", error)
1044
# Do not run session.bye() here: the session is not
1045
# established. Just abandon the request.
1046
return
1047
logger.debug(u"Handshake succeeded")
1048
try:
1049
try:
1050
fpr = self.fingerprint(self.peer_certificate
1051
(session))
1052
except (TypeError, gnutls.errors.GNUTLSError), error:
1053
logger.warning(u"Bad certificate: %s", error)
1054
return
1055
logger.debug(u"Fingerprint: %s", fpr)
1056
1057
for c in self.server.clients:
1058
if c.fingerprint == fpr:
1059
client = c
1060
break
1061
else:
1062
ipc.write(u"NOTFOUND %s %s\n"
1063
% (fpr, unicode(self.client_address)))
1064
return
1065
1066
class ClientProxy(object):
1067
"""Client proxy object. Not for calling methods."""
1068
def __init__(self, client):
1069
self.client = client
1070
def __getattr__(self, name):
1071
if name.startswith("ipc_"):
1072
def tempfunc():
1073
ipc.write("%s %s\n" % (name[4:].upper(),
1074
self.client.name))
1075
return tempfunc
1076
if not hasattr(self.client, name):
1077
raise AttributeError
1078
ipc.write(u"GETATTR %s %s\n"
1079
% (name, self.client.fingerprint))
1080
return pickle.load(ipc_return)
1081
clientproxy = ClientProxy(client)
1082
# Have to check if client.enabled, since it is
1083
# possible that the client was disabled since the
1084
# GnuTLS session was established.
1085
if not clientproxy.enabled:
1086
clientproxy.ipc_disabled()
1087
return
1088
1089
clientproxy.ipc_sending()
1090
sent_size = 0
1091
while sent_size < len(client.secret):
1092
sent = session.send(client.secret[sent_size:])
1093
logger.debug(u"Sent: %d, remaining: %d",
1094
sent, len(client.secret)
1095
- (sent_size + sent))
1096
sent_size += sent
1097
finally:
1098
session.bye()
1099
1100
@staticmethod
1101
def peer_certificate(session):
1102
"Return the peer's OpenPGP certificate as a bytestring"
1103
# If not an OpenPGP certificate...
1104
if (gnutls.library.functions
1105
.gnutls_certificate_type_get(session._c_object)
1106
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1107
# ...do the normal thing
1108
return session.peer_certificate
1109
list_size = ctypes.c_uint(1)
1110
cert_list = (gnutls.library.functions
1111
.gnutls_certificate_get_peers
1112
(session._c_object, ctypes.byref(list_size)))
1113
if not bool(cert_list) and list_size.value != 0:
1114
raise gnutls.errors.GNUTLSError(u"error getting peer"
1115
u" certificate")
1116
if list_size.value == 0:
1117
return None
1118
cert = cert_list[0]
1119
return ctypes.string_at(cert.data, cert.size)
1120
1121
@staticmethod
1122
def fingerprint(openpgp):
1123
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1124
# New GnuTLS "datum" with the OpenPGP public key
1125
datum = (gnutls.library.types
1126
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1127
ctypes.POINTER
1128
(ctypes.c_ubyte)),
1129
ctypes.c_uint(len(openpgp))))
1130
# New empty GnuTLS certificate
1131
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1132
(gnutls.library.functions
1133
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1134
# Import the OpenPGP public key into the certificate
1135
(gnutls.library.functions
1136
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1137
gnutls.library.constants
1138
.GNUTLS_OPENPGP_FMT_RAW))
1139
# Verify the self signature in the key
1140
crtverify = ctypes.c_uint()
1141
(gnutls.library.functions
1142
.gnutls_openpgp_crt_verify_self(crt, 0,
1143
ctypes.byref(crtverify)))
1144
if crtverify.value != 0:
1145
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1146
raise (gnutls.errors.CertificateSecurityError
1147
(u"Verify failed"))
1148
# New buffer for the fingerprint
1149
buf = ctypes.create_string_buffer(20)
1150
buf_len = ctypes.c_size_t()
1151
# Get the fingerprint from the certificate into the buffer
1152
(gnutls.library.functions
1153
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1154
ctypes.byref(buf_len)))
1155
# Deinit the certificate
1156
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1157
# Convert the buffer to a Python bytestring
1158
fpr = ctypes.string_at(buf, buf_len.value)
1159
# Convert the bytestring to hexadecimal notation
1160
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1161
return hex_fpr
1162
1163
1164
class ForkingMixInWithPipes(socketserver.ForkingMixIn, object):
1165
"""Like socketserver.ForkingMixIn, but also pass a pipe pair."""
1166
def process_request(self, request, client_address):
1167
"""Overrides and wraps the original process_request().
1168
1169
This function creates a new pipe in self.pipe
1170
"""
1171
# Child writes to child_pipe
1172
self.child_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))
1173
# Parent writes to parent_pipe
1174
self.parent_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))
1175
super(ForkingMixInWithPipes,
1176
self).process_request(request, client_address)
1177
# Close unused ends for parent
1178
self.parent_pipe[0].close() # close read end
1179
self.child_pipe[1].close() # close write end
1180
self.add_pipe_fds(self.child_pipe[0], self.parent_pipe[1])
1181
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1182
"""Dummy function; override as necessary"""
1183
child_pipe_fd.close()
1184
parent_pipe_fd.close()
1185
1186
1187
class IPv6_TCPServer(ForkingMixInWithPipes,
1188
socketserver.TCPServer, object):
1189
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1190
726
1191
Attributes:
727
settings: Server settings
728
clients: Set() of Client objects
729
1192
enabled: Boolean; whether this server is activated yet
1193
interface: None or a network interface name (string)
1194
use_ipv6: Boolean; to use IPv6 or not
730
1195
"""
731
address_family = socket.AF_INET6
732
def __init__(self, *args, **kwargs):
733
if "settings" in kwargs:
734
self.settings = kwargs["settings"]
735
del kwargs["settings"]
736
if "clients" in kwargs:
737
self.clients = kwargs["clients"]
738
del kwargs["clients"]
739
self.enabled = False
740
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1196
def __init__(self, server_address, RequestHandlerClass,
1197
interface=None, use_ipv6=True):
1198
self.interface = interface
1199
if use_ipv6:
1200
self.address_family = socket.AF_INET6
1201
socketserver.TCPServer.__init__(self, server_address,
1202
RequestHandlerClass)
741
1203
def server_bind(self):
742
1204
"""This overrides the normal server_bind() function
743
1205
to bind to an interface if one was specified, and also NOT to
744
1206
bind to an address or port if they were not specified."""
745
if self.settings["interface"]:
746
# 25 is from /usr/include/asm-i486/socket.h
747
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
748
try:
749
self.socket.setsockopt(socket.SOL_SOCKET,
750
SO_BINDTODEVICE,
751
self.settings["interface"])
752
except socket.error, error:
753
if error[0] == errno.EPERM:
754
logger.error(u"No permission to"
755
u" bind to interface %s",
756
self.settings["interface"])
757
else:
758
raise error
1207
if self.interface is not None:
1208
if SO_BINDTODEVICE is None:
1209
logger.error(u"SO_BINDTODEVICE does not exist;"
1210
u" cannot bind to interface %s",
1211
self.interface)
1212
else:
1213
try:
1214
self.socket.setsockopt(socket.SOL_SOCKET,
1215
SO_BINDTODEVICE,
1216
str(self.interface
1217
+ u'\0'))
1218
except socket.error, error:
1219
if error[0] == errno.EPERM:
1220
logger.error(u"No permission to"
1221
u" bind to interface %s",
1222
self.interface)
1223
elif error[0] == errno.ENOPROTOOPT:
1224
logger.error(u"SO_BINDTODEVICE not available;"
1225
u" cannot bind to interface %s",
1226
self.interface)
1227
else:
1228
raise
759
1229
# Only bind(2) the socket if we really need to.
760
1230
if self.server_address[0] or self.server_address[1]:
761
1231
if not self.server_address[0]:
762
in6addr_any = "::"
763
self.server_address = (in6addr_any,
1232
if self.address_family == socket.AF_INET6:
1233
any_address = u"::" # in6addr_any
1234
else:
1235
any_address = socket.INADDR_ANY
1236
self.server_address = (any_address,
764
1237
self.server_address[1])
765
1238
elif not self.server_address[1]:
766
1239
self.server_address = (self.server_address[0],
767
1240
0)
768
# if self.settings["interface"]:
1241
# if self.interface:
769
1242
# self.server_address = (self.server_address[0],
770
1243
# 0, # port
771
1244
# 0, # flowinfo
772
1245
# if_nametoindex
773
# (self.settings
774
# ["interface"]))
775
return super(IPv6_TCPServer, self).server_bind()
1246
# (self.interface))
1247
return socketserver.TCPServer.server_bind(self)
1248
1249
1250
class MandosServer(IPv6_TCPServer):
1251
"""Mandos server.
1252
1253
Attributes:
1254
clients: set of Client objects
1255
gnutls_priority GnuTLS priority string
1256
use_dbus: Boolean; to emit D-Bus signals or not
1257
1258
Assumes a gobject.MainLoop event loop.
1259
"""
1260
def __init__(self, server_address, RequestHandlerClass,
1261
interface=None, use_ipv6=True, clients=None,
1262
gnutls_priority=None, use_dbus=True):
1263
self.enabled = False
1264
self.clients = clients
1265
if self.clients is None:
1266
self.clients = set()
1267
self.use_dbus = use_dbus
1268
self.gnutls_priority = gnutls_priority
1269
IPv6_TCPServer.__init__(self, server_address,
1270
RequestHandlerClass,
1271
interface = interface,
1272
use_ipv6 = use_ipv6)
776
1273
def server_activate(self):
777
1274
if self.enabled:
778
return super(IPv6_TCPServer, self).server_activate()
1275
return socketserver.TCPServer.server_activate(self)
779
1276
def enable(self):
780
1277
self.enabled = True
1278
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1279
# Call "handle_ipc" for both data and EOF events
1280
gobject.io_add_watch(child_pipe_fd.fileno(),
1281
gobject.IO_IN | gobject.IO_HUP,
1282
functools.partial(self.handle_ipc,
1283
reply = parent_pipe_fd,
1284
sender= child_pipe_fd))
1285
def handle_ipc(self, source, condition, reply=None, sender=None):
1286
condition_names = {
1287
gobject.IO_IN: u"IN", # There is data to read.
1288
gobject.IO_OUT: u"OUT", # Data can be written (without
1289
# blocking).
1290
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1291
gobject.IO_ERR: u"ERR", # Error condition.
1292
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1293
# broken, usually for pipes and
1294
# sockets).
1295
}
1296
conditions_string = ' | '.join(name
1297
for cond, name in
1298
condition_names.iteritems()
1299
if cond & condition)
1300
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1301
conditions_string)
1302
1303
# Read a line from the file object
1304
cmdline = sender.readline()
1305
if not cmdline: # Empty line means end of file
1306
# close the IPC pipes
1307
sender.close()
1308
reply.close()
1309
1310
# Stop calling this function
1311
return False
1312
1313
logger.debug(u"IPC command: %r", cmdline)
1314
1315
# Parse and act on command
1316
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1317
1318
if cmd == u"NOTFOUND":
1319
fpr, address = args.split(None, 1)
1320
logger.warning(u"Client not found for fingerprint: %s, ad"
1321
u"dress: %s", fpr, address)
1322
if self.use_dbus:
1323
# Emit D-Bus signal
1324
mandos_dbus_service.ClientNotFound(fpr, address)
1325
elif cmd == u"DISABLED":
1326
for client in self.clients:
1327
if client.name == args:
1328
logger.warning(u"Client %s is disabled", args)
1329
if self.use_dbus:
1330
# Emit D-Bus signal
1331
client.Rejected()
1332
break
1333
else:
1334
logger.error(u"Unknown client %s is disabled", args)
1335
elif cmd == u"SENDING":
1336
for client in self.clients:
1337
if client.name == args:
1338
logger.info(u"Sending secret to %s", client.name)
1339
client.checked_ok()
1340
if self.use_dbus:
1341
# Emit D-Bus signal
1342
client.GotSecret()
1343
break
1344
else:
1345
logger.error(u"Sending secret to unknown client %s",
1346
args)
1347
elif cmd == u"GETATTR":
1348
attr_name, fpr = args.split(None, 1)
1349
for client in self.clients:
1350
if client.fingerprint == fpr:
1351
attr_value = getattr(client, attr_name, None)
1352
logger.debug("IPC reply: %r", attr_value)
1353
pickle.dump(attr_value, reply)
1354
break
1355
else:
1356
logger.error(u"Client %s on address %s requesting "
1357
u"attribute %s not found", fpr, address,
1358
attr_name)
1359
pickle.dump(None, reply)
1360
else:
1361
logger.error(u"Unknown IPC command: %r", cmdline)
1362
1363
# Keep calling this function
1364
return True
781
1365
782
1366
783
1367
def string_to_delta(interval):
784
1368
"""Parse a string and return a datetime.timedelta
785
786
>>> string_to_delta('7d')
1369
1370
>>> string_to_delta(u'7d')
787
1371
datetime.timedelta(7)
788
>>> string_to_delta('60s')
1372
>>> string_to_delta(u'60s')
789
1373
datetime.timedelta(0, 60)
790
>>> string_to_delta('60m')
1374
>>> string_to_delta(u'60m')
791
1375
datetime.timedelta(0, 3600)
792
>>> string_to_delta('24h')
1376
>>> string_to_delta(u'24h')
793
1377
datetime.timedelta(1)
794
1378
>>> string_to_delta(u'1w')
795
1379
datetime.timedelta(7)
796
>>> string_to_delta('5m 30s')
1380
>>> string_to_delta(u'5m 30s')
797
1381
datetime.timedelta(0, 330)
798
1382
"""
799
1383
timevalue = datetime.timedelta(0)
812
1396
elif suffix == u"w":
813
1397
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
814
1398
else:
815
raise ValueError
816
except (ValueError, IndexError):
817
raise ValueError
1399
raise ValueError(u"Unknown suffix %r" % suffix)
1400
except (ValueError, IndexError), e:
1401
raise ValueError(e.message)
818
1402
timevalue += delta
819
1403
return timevalue
820
1404
821
1405
822
def server_state_changed(state):
823
"""Derived from the Avahi example code"""
824
if state == avahi.SERVER_COLLISION:
825
logger.error(u"Zeroconf server name collision")
826
service.remove()
827
elif state == avahi.SERVER_RUNNING:
828
service.add()
829
830
831
def entry_group_state_changed(state, error):
832
"""Derived from the Avahi example code"""
833
logger.debug(u"Avahi state change: %i", state)
834
835
if state == avahi.ENTRY_GROUP_ESTABLISHED:
836
logger.debug(u"Zeroconf service established.")
837
elif state == avahi.ENTRY_GROUP_COLLISION:
838
logger.warning(u"Zeroconf service name collision.")
839
service.rename()
840
elif state == avahi.ENTRY_GROUP_FAILURE:
841
logger.critical(u"Avahi: Error in group state changed %s",
842
unicode(error))
843
raise AvahiGroupError(u"State changed: %s" % unicode(error))
844
845
1406
def if_nametoindex(interface):
846
"""Call the C function if_nametoindex(), or equivalent"""
1407
"""Call the C function if_nametoindex(), or equivalent
1408
1409
Note: This function cannot accept a unicode string."""
847
1410
global if_nametoindex
848
1411
try:
849
1412
if_nametoindex = (ctypes.cdll.LoadLibrary
850
(ctypes.util.find_library("c"))
1413
(ctypes.util.find_library(u"c"))
851
1414
.if_nametoindex)
852
1415
except (OSError, AttributeError):
853
if "struct" not in sys.modules:
854
import struct
855
if "fcntl" not in sys.modules:
856
import fcntl
1416
logger.warning(u"Doing if_nametoindex the hard way")
857
1417
def if_nametoindex(interface):
858
1418
"Get an interface index the hard way, i.e. using fcntl()"
859
1419
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
860
with closing(socket.socket()) as s:
1420
with contextlib.closing(socket.socket()) as s:
861
1421
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
862
struct.pack("16s16x", interface))
863
interface_index = struct.unpack("I", ifreq[16:20])[0]
1422
struct.pack(str(u"16s16x"),
1423
interface))
1424
interface_index = struct.unpack(str(u"I"),
1425
ifreq[16:20])[0]
864
1426
return interface_index
865
1427
return if_nametoindex(interface)
866
1428
867
1429
868
1430
def daemon(nochdir = False, noclose = False):
869
1431
"""See daemon(3). Standard BSD Unix function.
1432
870
1433
This should really exist as os.daemon, but it doesn't (yet)."""
871
1434
if os.fork():
872
1435
sys.exit()
873
1436
os.setsid()
874
1437
if not nochdir:
875
os.chdir("/")
1438
os.chdir(u"/")
876
1439
if os.fork():
877
1440
sys.exit()
878
1441
if not noclose:
880
1443
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
881
1444
if not stat.S_ISCHR(os.fstat(null).st_mode):
882
1445
raise OSError(errno.ENODEV,
883
"/dev/null not a character device")
1446
u"%s not a character device"
1447
% os.path.devnull)
884
1448
os.dup2(null, sys.stdin.fileno())
885
1449
os.dup2(null, sys.stdout.fileno())
886
1450
os.dup2(null, sys.stderr.fileno())
889
1453
890
1454
891
1455
def main():
1456
1457
##################################################################
1458
# Parsing of options, both command line and config file
1459
892
1460
parser = optparse.OptionParser(version = "%%prog %s" % version)
893
parser.add_option("-i", "--interface", type="string",
894
metavar="IF", help="Bind to interface IF")
895
parser.add_option("-a", "--address", type="string",
896
help="Address to listen for requests on")
897
parser.add_option("-p", "--port", type="int",
898
help="Port number to receive requests on")
899
parser.add_option("--check", action="store_true",
900
help="Run self-test")
901
parser.add_option("--debug", action="store_true",
902
help="Debug mode; run in foreground and log to"
903
" terminal")
904
parser.add_option("--priority", type="string", help="GnuTLS"
905
" priority string (see GnuTLS documentation)")
906
parser.add_option("--servicename", type="string", metavar="NAME",
907
help="Zeroconf service name")
908
parser.add_option("--configdir", type="string",
909
default="/etc/mandos", metavar="DIR",
910
help="Directory to search for configuration"
911
" files")
912
parser.add_option("--no-dbus", action="store_false",
913
dest="use_dbus",
914
help=optparse.SUPPRESS_HELP) # XXX: Not done yet
1461
parser.add_option("-i", u"--interface", type=u"string",
1462
metavar="IF", help=u"Bind to interface IF")
1463
parser.add_option("-a", u"--address", type=u"string",
1464
help=u"Address to listen for requests on")
1465
parser.add_option("-p", u"--port", type=u"int",
1466
help=u"Port number to receive requests on")
1467
parser.add_option("--check", action=u"store_true",
1468
help=u"Run self-test")
1469
parser.add_option("--debug", action=u"store_true",
1470
help=u"Debug mode; run in foreground and log to"
1471
u" terminal")
1472
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1473
u" priority string (see GnuTLS documentation)")
1474
parser.add_option("--servicename", type=u"string",
1475
metavar=u"NAME", help=u"Zeroconf service name")
1476
parser.add_option("--configdir", type=u"string",
1477
default=u"/etc/mandos", metavar=u"DIR",
1478
help=u"Directory to search for configuration"
1479
u" files")
1480
parser.add_option("--no-dbus", action=u"store_false",
1481
dest=u"use_dbus", help=u"Do not provide D-Bus"
1482
u" system bus interface")
1483
parser.add_option("--no-ipv6", action=u"store_false",
1484
dest=u"use_ipv6", help=u"Do not use IPv6")
915
1485
options = parser.parse_args()[0]
916
1486
917
1487
if options.check:
920
1490
sys.exit()
921
1491
922
1492
# Default values for config file for server-global settings
923
server_defaults = { "interface": "",
924
"address": "",
925
"port": "",
926
"debug": "False",
927
"priority":
928
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
929
"servicename": "Mandos",
930
"use_dbus": "True",
1493
server_defaults = { u"interface": u"",
1494
u"address": u"",
1495
u"port": u"",
1496
u"debug": u"False",
1497
u"priority":
1498
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1499
u"servicename": u"Mandos",
1500
u"use_dbus": u"True",
1501
u"use_ipv6": u"True",
931
1502
}
932
1503
933
1504
# Parse config file for server-global settings
934
server_config = ConfigParser.SafeConfigParser(server_defaults)
1505
server_config = configparser.SafeConfigParser(server_defaults)
935
1506
del server_defaults
936
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1507
server_config.read(os.path.join(options.configdir,
1508
u"mandos.conf"))
937
1509
# Convert the SafeConfigParser object to a dict
938
1510
server_settings = server_config.defaults()
939
# Use getboolean on the boolean config options
940
server_settings["debug"] = (server_config.getboolean
941
("DEFAULT", "debug"))
942
server_settings["use_dbus"] = (server_config.getboolean
943
("DEFAULT", "use_dbus"))
1511
# Use the appropriate methods on the non-string config options
1512
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1513
server_settings[option] = server_config.getboolean(u"DEFAULT",
1514
option)
1515
if server_settings["port"]:
1516
server_settings["port"] = server_config.getint(u"DEFAULT",
1517
u"port")
944
1518
del server_config
945
1519
946
1520
# Override the settings from the config file with command line
947
1521
# options, if set.
948
for option in ("interface", "address", "port", "debug",
949
"priority", "servicename", "configdir",
950
"use_dbus"):
1522
for option in (u"interface", u"address", u"port", u"debug",
1523
u"priority", u"servicename", u"configdir",
1524
u"use_dbus", u"use_ipv6"):
951
1525
value = getattr(options, option)
952
1526
if value is not None:
953
1527
server_settings[option] = value
954
1528
del options
1529
# Force all strings to be unicode
1530
for option in server_settings.keys():
1531
if type(server_settings[option]) is str:
1532
server_settings[option] = unicode(server_settings[option])
955
1533
# Now we have our good server settings in "server_settings"
956
1534
1535
##################################################################
1536
957
1537
# For convenience
958
debug = server_settings["debug"]
959
use_dbus = server_settings["use_dbus"]
960
use_dbus = False # XXX: Not done yet
1538
debug = server_settings[u"debug"]
1539
use_dbus = server_settings[u"use_dbus"]
1540
use_ipv6 = server_settings[u"use_ipv6"]
961
1541
962
1542
if not debug:
963
1543
syslogger.setLevel(logging.WARNING)
964
1544
console.setLevel(logging.WARNING)
965
1545
966
if server_settings["servicename"] != "Mandos":
1546
if server_settings[u"servicename"] != u"Mandos":
967
1547
syslogger.setFormatter(logging.Formatter
968
('Mandos (%s): %%(levelname)s:'
969
' %%(message)s'
970
% server_settings["servicename"]))
1548
(u'Mandos (%s) [%%(process)d]:'
1549
u' %%(levelname)s: %%(message)s'
1550
% server_settings[u"servicename"]))
971
1551
972
1552
# Parse config file with clients
973
client_defaults = { "timeout": "1h",
974
"interval": "5m",
975
"checker": "fping -q -- %%(host)s",
976
"host": "",
1553
client_defaults = { u"timeout": u"1h",
1554
u"interval": u"5m",
1555
u"checker": u"fping -q -- %%(host)s",
1556
u"host": u"",
977
1557
}
978
client_config = ConfigParser.SafeConfigParser(client_defaults)
979
client_config.read(os.path.join(server_settings["configdir"],
980
"clients.conf"))
981
982
clients = Set()
983
tcp_server = IPv6_TCPServer((server_settings["address"],
984
server_settings["port"]),
985
TCP_handler,
986
settings=server_settings,
987
clients=clients)
988
pidfilename = "/var/run/mandos.pid"
989
try:
990
pidfile = open(pidfilename, "w")
991
except IOError, error:
992
logger.error("Could not open file %r", pidfilename)
993
994
try:
995
uid = pwd.getpwnam("_mandos").pw_uid
996
gid = pwd.getpwnam("_mandos").pw_gid
1558
client_config = configparser.SafeConfigParser(client_defaults)
1559
client_config.read(os.path.join(server_settings[u"configdir"],
1560
u"clients.conf"))
1561
1562
global mandos_dbus_service
1563
mandos_dbus_service = None
1564
1565
tcp_server = MandosServer((server_settings[u"address"],
1566
server_settings[u"port"]),
1567
ClientHandler,
1568
interface=(server_settings[u"interface"]
1569
or None),
1570
use_ipv6=use_ipv6,
1571
gnutls_priority=
1572
server_settings[u"priority"],
1573
use_dbus=use_dbus)
1574
pidfilename = u"/var/run/mandos.pid"
1575
try:
1576
pidfile = open(pidfilename, u"w")
1577
except IOError:
1578
logger.error(u"Could not open file %r", pidfilename)
1579
1580
try:
1581
uid = pwd.getpwnam(u"_mandos").pw_uid
1582
gid = pwd.getpwnam(u"_mandos").pw_gid
997
1583
except KeyError:
998
1584
try:
999
uid = pwd.getpwnam("mandos").pw_uid
1000
gid = pwd.getpwnam("mandos").pw_gid
1585
uid = pwd.getpwnam(u"mandos").pw_uid
1586
gid = pwd.getpwnam(u"mandos").pw_gid
1001
1587
except KeyError:
1002
1588
try:
1003
uid = pwd.getpwnam("nobody").pw_uid
1004
gid = pwd.getpwnam("nogroup").pw_gid
1589
uid = pwd.getpwnam(u"nobody").pw_uid
1590
gid = pwd.getpwnam(u"nobody").pw_gid
1005
1591
except KeyError:
1006
1592
uid = 65534
1007
1593
gid = 65534
1008
1594
try:
1595
os.setgid(gid)
1009
1596
os.setuid(uid)
1010
os.setgid(gid)
1011
1597
except OSError, error:
1012
1598
if error[0] != errno.EPERM:
1013
1599
raise error
1014
1600
1015
global service
1016
service = AvahiService(name = server_settings["servicename"],
1017
servicetype = "_mandos._tcp", )
1018
if server_settings["interface"]:
1019
service.interface = (if_nametoindex
1020
(server_settings["interface"]))
1601
# Enable all possible GnuTLS debugging
1602
if debug:
1603
# "Use a log level over 10 to enable all debugging options."
1604
# - GnuTLS manual
1605
gnutls.library.functions.gnutls_global_set_log_level(11)
1606
1607
@gnutls.library.types.gnutls_log_func
1608
def debug_gnutls(level, string):
1609
logger.debug(u"GnuTLS: %s", string[:-1])
1610
1611
(gnutls.library.functions
1612
.gnutls_global_set_log_function(debug_gnutls))
1021
1613
1022
1614
global main_loop
1023
global bus
1024
global server
1025
1615
# From the Avahi example code
1026
1616
DBusGMainLoop(set_as_default=True )
1027
1617
main_loop = gobject.MainLoop()
1028
1618
bus = dbus.SystemBus()
1029
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1030
avahi.DBUS_PATH_SERVER),
1031
avahi.DBUS_INTERFACE_SERVER)
1032
1619
# End of Avahi example code
1033
1620
if use_dbus:
1034
bus_name = dbus.service.BusName(u"org.mandos-system.Mandos",
1035
bus)
1621
try:
1622
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1623
bus, do_not_queue=True)
1624
except dbus.exceptions.NameExistsException, e:
1625
logger.error(unicode(e) + u", disabling D-Bus")
1626
use_dbus = False
1627
server_settings[u"use_dbus"] = False
1628
tcp_server.use_dbus = False
1629
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1630
service = AvahiService(name = server_settings[u"servicename"],
1631
servicetype = u"_mandos._tcp",
1632
protocol = protocol, bus = bus)
1633
if server_settings["interface"]:
1634
service.interface = (if_nametoindex
1635
(str(server_settings[u"interface"])))
1036
1636
1037
clients.update(Set(Client(name = section,
1038
config
1039
= dict(client_config.items(section)),
1040
use_dbus = use_dbus)
1041
for section in client_config.sections()))
1042
if not clients:
1637
client_class = Client
1638
if use_dbus:
1639
client_class = functools.partial(ClientDBus, bus = bus)
1640
tcp_server.clients.update(set(
1641
client_class(name = section,
1642
config= dict(client_config.items(section)))
1643
for section in client_config.sections()))
1644
if not tcp_server.clients:
1043
1645
logger.warning(u"No clients defined")
1044
1646
1045
1647
if debug:
1055
1657
daemon()
1056
1658
1057
1659
try:
1058
pid = os.getpid()
1059
pidfile.write(str(pid) + "\n")
1060
pidfile.close()
1660
with pidfile:
1661
pid = os.getpid()
1662
pidfile.write(str(pid) + "\n")
1061
1663
del pidfile
1062
1664
except IOError:
1063
1665
logger.error(u"Could not write to file %r with PID %d",
1067
1669
pass
1068
1670
del pidfilename
1069
1671
1070
def cleanup():
1071
"Cleanup function; run on exit"
1072
global group
1073
# From the Avahi example code
1074
if not group is None:
1075
group.Free()
1076
group = None
1077
# End of Avahi example code
1078
1079
while clients:
1080
client = clients.pop()
1081
client.disable_hook = None
1082
client.disable()
1083
1084
atexit.register(cleanup)
1085
1086
1672
if not debug:
1087
1673
signal.signal(signal.SIGINT, signal.SIG_IGN)
1088
1674
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1089
1675
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1090
1676
1091
1677
if use_dbus:
1092
class MandosServer(dbus.service.Object):
1678
class MandosDBusService(dbus.service.Object):
1093
1679
"""A D-Bus proxy object"""
1094
1680
def __init__(self):
1095
dbus.service.Object.__init__(self, bus,
1096
"/Mandos")
1097
_interface = u"org.mandos_system.Mandos"
1098
1099
@dbus.service.signal(_interface, signature="oa{sv}")
1100
def ClientAdded(self, objpath, properties):
1101
"D-Bus signal"
1102
pass
1103
1104
@dbus.service.signal(_interface, signature="o")
1105
def ClientRemoved(self, objpath):
1106
"D-Bus signal"
1107
pass
1108
1109
@dbus.service.method(_interface, out_signature="ao")
1681
dbus.service.Object.__init__(self, bus, u"/")
1682
_interface = u"se.bsnet.fukt.Mandos"
1683
1684
@dbus.service.signal(_interface, signature=u"o")
1685
def ClientAdded(self, objpath):
1686
"D-Bus signal"
1687
pass
1688
1689
@dbus.service.signal(_interface, signature=u"ss")
1690
def ClientNotFound(self, fingerprint, address):
1691
"D-Bus signal"
1692
pass
1693
1694
@dbus.service.signal(_interface, signature=u"os")
1695
def ClientRemoved(self, objpath, name):
1696
"D-Bus signal"
1697
pass
1698
1699
@dbus.service.method(_interface, out_signature=u"ao")
1110
1700
def GetAllClients(self):
1111
return dbus.Array(c.dbus_object_path for c in clients)
1112
1113
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1701
"D-Bus method"
1702
return dbus.Array(c.dbus_object_path
1703
for c in tcp_server.clients)
1704
1705
@dbus.service.method(_interface,
1706
out_signature=u"a{oa{sv}}")
1114
1707
def GetAllClientsWithProperties(self):
1708
"D-Bus method"
1115
1709
return dbus.Dictionary(
1116
((c.dbus_object_path, c.GetAllProperties())
1117
for c in clients),
1118
signature="oa{sv}")
1119
1120
@dbus.service.method(_interface, in_signature="o")
1710
((c.dbus_object_path, c.GetAll(u""))
1711
for c in tcp_server.clients),
1712
signature=u"oa{sv}")
1713
1714
@dbus.service.method(_interface, in_signature=u"o")
1121
1715
def RemoveClient(self, object_path):
1122
for c in clients:
1716
"D-Bus method"
1717
for c in tcp_server.clients:
1123
1718
if c.dbus_object_path == object_path:
1124
clients.remove(c)
1719
tcp_server.clients.remove(c)
1720
c.remove_from_connection()
1125
1721
# Don't signal anything except ClientRemoved
1126
c.use_dbus = False
1127
c.disable()
1722
c.disable(quiet=True)
1128
1723
# Emit D-Bus signal
1129
self.ClientRemoved(object_path)
1724
self.ClientRemoved(object_path, c.name)
1130
1725
return
1131
raise KeyError
1132
@dbus.service.method(_interface)
1133
def Quit(self):
1134
main_loop.quit()
1135
1726
raise KeyError(object_path)
1727
1136
1728
del _interface
1137
1138
mandos_server = MandosServer()
1139
1140
for client in clients:
1729
1730
mandos_dbus_service = MandosDBusService()
1731
1732
def cleanup():
1733
"Cleanup function; run on exit"
1734
service.cleanup()
1735
1736
while tcp_server.clients:
1737
client = tcp_server.clients.pop()
1738
if use_dbus:
1739
client.remove_from_connection()
1740
client.disable_hook = None
1741
# Don't signal anything except ClientRemoved
1742
client.disable(quiet=True)
1743
if use_dbus:
1744
# Emit D-Bus signal
1745
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1746
client.name)
1747
1748
atexit.register(cleanup)
1749
1750
for client in tcp_server.clients:
1141
1751
if use_dbus:
1142
1752
# Emit D-Bus signal
1143
mandos_server.ClientAdded(client.dbus_object_path,
1144
client.GetAllProperties())
1753
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1145
1754
client.enable()
1146
1755
1147
1756
tcp_server.enable()
1149
1758
1150
1759
# Find out what port we got
1151
1760
service.port = tcp_server.socket.getsockname()[1]
1152
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1153
u" scope_id %d" % tcp_server.socket.getsockname())
1761
if use_ipv6:
1762
logger.info(u"Now listening on address %r, port %d,"
1763
" flowinfo %d, scope_id %d"
1764
% tcp_server.socket.getsockname())
1765
else: # IPv4
1766
logger.info(u"Now listening on address %r, port %d"
1767
% tcp_server.socket.getsockname())
1154
1768
1155
1769
#service.interface = tcp_server.socket.getsockname()[3]
1156
1770
1157
1771
try:
1158
1772
# From the Avahi example code
1159
server.connect_to_signal("StateChanged", server_state_changed)
1160
1773
try:
1161
server_state_changed(server.GetState())
1774
service.activate()
1162
1775
except dbus.exceptions.DBusException, error:
1163
1776
logger.critical(u"DBusException: %s", error)
1777
cleanup()
1164
1778
sys.exit(1)
1165
1779
# End of Avahi example code
1166
1780
1173
1787
main_loop.run()
1174
1788
except AvahiError, error:
1175
1789
logger.critical(u"AvahiError: %s", error)
1790
cleanup()
1176
1791
sys.exit(1)
1177
1792
except KeyboardInterrupt:
1178
1793
if debug:
1179
print
1794
print >> sys.stderr
1795
logger.debug(u"Server received KeyboardInterrupt")
1796
logger.debug(u"Server exiting")
1797
# Must run before the D-Bus bus name gets deregistered
1798
cleanup()
1180
1799
1181
1800
if __name__ == '__main__':
1182
1801
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0