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- Committer: Teddy Hogeborn
- Date: 2009-11-19 18:31:28 UTC
- Revision ID: teddy@fukt.bsnet.se-20091119183128-ttstewh61xmtnil1
* Makefile (LINK_FORTIFY_LD): Bug fix: removed "-fPIE".
* mandos-keygen: Bug fix: Fix quoting for the "--password" option.
* mandos-keygen: Bug fix: Fix quoting for the "--password" option.
- 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
57
56
import logging.handlers
58
57
import pwd
59
58
from contextlib import closing
59
import struct
60
import fcntl
61
import functools
60
62
61
63
import dbus
62
64
import dbus.service
65
67
from dbus.mainloop.glib import DBusGMainLoop
66
68
import ctypes
67
69
import ctypes.util
68
69
version = "1.0.5"
70
71
logger = logging.Logger('mandos')
70
import xml.dom.minidom
71
import inspect
72
73
try:
74
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
75
except AttributeError:
76
try:
77
from IN import SO_BINDTODEVICE
78
except ImportError:
79
SO_BINDTODEVICE = None
80
81
82
version = "1.0.14"
83
84
logger = logging.Logger(u'mandos')
72
85
syslogger = (logging.handlers.SysLogHandler
73
86
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
87
address = "/dev/log"))
75
88
syslogger.setFormatter(logging.Formatter
76
('Mandos: %(levelname)s: %(message)s'))
89
(u'Mandos [%(process)d]: %(levelname)s:'
90
u' %(message)s'))
77
91
logger.addHandler(syslogger)
78
92
79
93
console = logging.StreamHandler()
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
81
' %(message)s'))
94
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
95
u' %(levelname)s:'
96
u' %(message)s'))
82
97
logger.addHandler(console)
83
98
84
99
class AvahiError(Exception):
97
112
98
113
class AvahiService(object):
99
114
"""An Avahi (Zeroconf) service.
115
100
116
Attributes:
101
117
interface: integer; avahi.IF_UNSPEC or an interface index.
102
118
Used to optionally bind to the specified interface.
103
name: string; Example: 'Mandos'
104
type: string; Example: '_mandos._tcp'.
119
name: string; Example: u'Mandos'
120
type: string; Example: u'_mandos._tcp'.
105
121
See <http://www.dns-sd.org/ServiceTypes.html>
106
122
port: integer; what port to announce
107
123
TXT: list of strings; TXT record for the service
110
126
max_renames: integer; maximum number of renames
111
127
rename_count: integer; counter so we only rename after collisions
112
128
a sensible number of times
129
group: D-Bus Entry Group
130
server: D-Bus Server
131
bus: dbus.SystemBus()
113
132
"""
114
133
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
134
servicetype = None, port = None, TXT = None,
116
domain = "", host = "", max_renames = 32768):
135
domain = u"", host = u"", max_renames = 32768,
136
protocol = avahi.PROTO_UNSPEC, bus = None):
117
137
self.interface = interface
118
138
self.name = name
119
139
self.type = servicetype
123
143
self.host = host
124
144
self.rename_count = 0
125
145
self.max_renames = max_renames
146
self.protocol = protocol
147
self.group = None # our entry group
148
self.server = None
149
self.bus = bus
126
150
def rename(self):
127
151
"""Derived from the Avahi example code"""
128
152
if self.rename_count >= self.max_renames:
130
154
u" after %i retries, exiting.",
131
155
self.rename_count)
132
156
raise AvahiServiceError(u"Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
157
self.name = self.server.GetAlternativeServiceName(self.name)
134
158
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
159
unicode(self.name))
136
160
syslogger.setFormatter(logging.Formatter
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
161
(u'Mandos (%s) [%%(process)d]:'
162
u' %%(levelname)s: %%(message)s'
163
% self.name))
139
164
self.remove()
140
165
self.add()
141
166
self.rename_count += 1
142
167
def remove(self):
143
168
"""Derived from the Avahi example code"""
144
if group is not None:
145
group.Reset()
169
if self.group is not None:
170
self.group.Reset()
146
171
def add(self):
147
172
"""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)
173
if self.group is None:
174
self.group = dbus.Interface(
175
self.bus.get_object(avahi.DBUS_NAME,
176
self.server.EntryGroupNew()),
177
avahi.DBUS_INTERFACE_ENTRY_GROUP)
178
self.group.connect_to_signal('StateChanged',
179
self
180
.entry_group_state_changed)
156
181
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):
182
self.name, self.type)
183
self.group.AddService(
184
self.interface,
185
self.protocol,
186
dbus.UInt32(0), # flags
187
self.name, self.type,
188
self.domain, self.host,
189
dbus.UInt16(self.port),
190
avahi.string_array_to_txt_array(self.TXT))
191
self.group.Commit()
192
def entry_group_state_changed(self, state, error):
193
"""Derived from the Avahi example code"""
194
logger.debug(u"Avahi state change: %i", state)
195
196
if state == avahi.ENTRY_GROUP_ESTABLISHED:
197
logger.debug(u"Zeroconf service established.")
198
elif state == avahi.ENTRY_GROUP_COLLISION:
199
logger.warning(u"Zeroconf service name collision.")
200
self.rename()
201
elif state == avahi.ENTRY_GROUP_FAILURE:
202
logger.critical(u"Avahi: Error in group state changed %s",
203
unicode(error))
204
raise AvahiGroupError(u"State changed: %s"
205
% unicode(error))
206
def cleanup(self):
207
"""Derived from the Avahi example code"""
208
if self.group is not None:
209
self.group.Free()
210
self.group = None
211
def server_state_changed(self, state):
212
"""Derived from the Avahi example code"""
213
if state == avahi.SERVER_COLLISION:
214
logger.error(u"Zeroconf server name collision")
215
self.remove()
216
elif state == avahi.SERVER_RUNNING:
217
self.add()
218
def activate(self):
219
"""Derived from the Avahi example code"""
220
if self.server is None:
221
self.server = dbus.Interface(
222
self.bus.get_object(avahi.DBUS_NAME,
223
avahi.DBUS_PATH_SERVER),
224
avahi.DBUS_INTERFACE_SERVER)
225
self.server.connect_to_signal(u"StateChanged",
226
self.server_state_changed)
227
self.server_state_changed(self.server.GetState())
228
229
230
class Client(object):
179
231
"""A representation of a client host served by this server.
232
180
233
Attributes:
181
234
name: string; from the config file, used in log messages and
182
235
D-Bus identifiers
196
249
to see if the client lives.
197
250
'None' if no process is running.
198
251
checker_initiator_tag: a gobject event source tag, or None
199
disable_initiator_tag: - '' -
252
disable_initiator_tag: - '' -
200
253
checker_callback_tag: - '' -
201
254
checker_command: string; External command which is run to check if
202
255
client lives. %() expansions are done at
203
256
runtime with vars(self) as dict, so that for
204
257
instance %(name)s can be used in the command.
205
use_dbus: bool(); Whether to provide D-Bus interface and signals
206
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
258
current_checker_command: string; current running checker_command
207
259
"""
260
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))
267
208
268
def timeout_milliseconds(self):
209
269
"Return the 'timeout' attribute in milliseconds"
210
return ((self.timeout.days * 24 * 60 * 60 * 1000)
211
+ (self.timeout.seconds * 1000)
212
+ (self.timeout.microseconds // 1000))
270
return self._timedelta_to_milliseconds(self.timeout)
213
271
214
272
def interval_milliseconds(self):
215
273
"Return the 'interval' attribute in milliseconds"
216
return ((self.interval.days * 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds * 1000)
218
+ (self.interval.microseconds // 1000))
274
return self._timedelta_to_milliseconds(self.interval)
219
275
220
def __init__(self, name = None, disable_hook=None, config=None,
221
use_dbus=True):
276
def __init__(self, name = None, disable_hook=None, config=None):
222
277
"""Note: the 'checker' key in 'config' sets the
223
278
'checker_command' attribute and *not* the 'checker'
224
279
attribute."""
226
281
if config is None:
227
282
config = {}
228
283
logger.debug(u"Creating client %r", self.name)
229
self.use_dbus = False # During __init__
230
284
# Uppercase and remove spaces from fingerprint for later
231
285
# comparison purposes with return value from the fingerprint()
232
286
# function
233
self.fingerprint = (config["fingerprint"].upper()
287
self.fingerprint = (config[u"fingerprint"].upper()
234
288
.replace(u" ", u""))
235
289
logger.debug(u" Fingerprint: %s", self.fingerprint)
236
if "secret" in config:
237
self.secret = config["secret"].decode(u"base64")
238
elif "secfile" in config:
290
if u"secret" in config:
291
self.secret = config[u"secret"].decode(u"base64")
292
elif u"secfile" in config:
239
293
with closing(open(os.path.expanduser
240
294
(os.path.expandvars
241
(config["secfile"])))) as secfile:
295
(config[u"secfile"])),
296
"rb")) as secfile:
242
297
self.secret = secfile.read()
243
298
else:
244
299
raise TypeError(u"No secret or secfile for client %s"
245
300
% self.name)
246
self.host = config.get("host", "")
301
self.host = config.get(u"host", u"")
247
302
self.created = datetime.datetime.utcnow()
248
303
self.enabled = False
249
304
self.last_enabled = None
250
305
self.last_checked_ok = None
251
self.timeout = string_to_delta(config["timeout"])
252
self.interval = string_to_delta(config["interval"])
306
self.timeout = string_to_delta(config[u"timeout"])
307
self.interval = string_to_delta(config[u"interval"])
253
308
self.disable_hook = disable_hook
254
309
self.checker = None
255
310
self.checker_initiator_tag = None
256
311
self.disable_initiator_tag = None
257
312
self.checker_callback_tag = None
258
self.checker_command = config["checker"]
313
self.checker_command = config[u"checker"]
314
self.current_checker_command = None
259
315
self.last_connect = None
260
# Only now, when this client is initialized, can it show up on
261
# the D-Bus
262
self.use_dbus = use_dbus
263
if self.use_dbus:
264
self.dbus_object_path = (dbus.ObjectPath
265
("/clients/"
266
+ self.name.replace(".", "_")))
267
dbus.service.Object.__init__(self, bus,
268
self.dbus_object_path)
269
316
270
317
def enable(self):
271
318
"""Start this client's checker and timeout hooks"""
319
if getattr(self, u"enabled", False):
320
# Already enabled
321
return
272
322
self.last_enabled = datetime.datetime.utcnow()
273
323
# Schedule a new checker to be started an 'interval' from now,
274
324
# and every interval from then on.
275
325
self.checker_initiator_tag = (gobject.timeout_add
276
326
(self.interval_milliseconds(),
277
327
self.start_checker))
278
# Also start a new checker *right now*.
279
self.start_checker()
280
328
# Schedule a disable() when 'timeout' has passed
281
329
self.disable_initiator_tag = (gobject.timeout_add
282
330
(self.timeout_milliseconds(),
283
331
self.disable))
284
332
self.enabled = True
285
if self.use_dbus:
286
# Emit D-Bus signals
287
self.PropertyChanged(dbus.String(u"enabled"),
288
dbus.Boolean(True, variant_level=1))
289
self.PropertyChanged(dbus.String(u"last_enabled"),
290
(_datetime_to_dbus(self.last_enabled,
291
variant_level=1)))
333
# Also start a new checker *right now*.
334
self.start_checker()
292
335
293
def disable(self):
336
def disable(self, quiet=True):
294
337
"""Disable this client."""
295
338
if not getattr(self, "enabled", False):
296
339
return False
297
logger.info(u"Disabling client %s", self.name)
298
if getattr(self, "disable_initiator_tag", False):
340
if not quiet:
341
logger.info(u"Disabling client %s", self.name)
342
if getattr(self, u"disable_initiator_tag", False):
299
343
gobject.source_remove(self.disable_initiator_tag)
300
344
self.disable_initiator_tag = None
301
if getattr(self, "checker_initiator_tag", False):
345
if getattr(self, u"checker_initiator_tag", False):
302
346
gobject.source_remove(self.checker_initiator_tag)
303
347
self.checker_initiator_tag = None
304
348
self.stop_checker()
305
349
if self.disable_hook:
306
350
self.disable_hook(self)
307
351
self.enabled = False
308
if self.use_dbus:
309
# Emit D-Bus signal
310
self.PropertyChanged(dbus.String(u"enabled"),
311
dbus.Boolean(False, variant_level=1))
312
352
# Do not run this again if called by a gobject.timeout_add
313
353
return False
314
354
320
360
"""The checker has completed, so take appropriate actions."""
321
361
self.checker_callback_tag = None
322
362
self.checker = None
323
if self.use_dbus:
324
# Emit D-Bus signal
325
self.PropertyChanged(dbus.String(u"checker_running"),
326
dbus.Boolean(False, variant_level=1))
327
363
if os.WIFEXITED(condition):
328
364
exitstatus = os.WEXITSTATUS(condition)
329
365
if exitstatus == 0:
333
369
else:
334
370
logger.info(u"Checker for %(name)s failed",
335
371
vars(self))
336
if self.use_dbus:
337
# Emit D-Bus signal
338
self.CheckerCompleted(dbus.Int16(exitstatus),
339
dbus.Int64(condition),
340
dbus.String(command))
341
372
else:
342
373
logger.warning(u"Checker for %(name)s crashed?",
343
374
vars(self))
344
if self.use_dbus:
345
# Emit D-Bus signal
346
self.CheckerCompleted(dbus.Int16(-1),
347
dbus.Int64(condition),
348
dbus.String(command))
349
375
350
376
def checked_ok(self):
351
377
"""Bump up the timeout for this client.
378
352
379
This should only be called when the client has been seen,
353
380
alive and well.
354
381
"""
357
384
self.disable_initiator_tag = (gobject.timeout_add
358
385
(self.timeout_milliseconds(),
359
386
self.disable))
360
if self.use_dbus:
361
# Emit D-Bus signal
362
self.PropertyChanged(
363
dbus.String(u"last_checked_ok"),
364
(_datetime_to_dbus(self.last_checked_ok,
365
variant_level=1)))
366
387
367
388
def start_checker(self):
368
389
"""Start a new checker subprocess if one is not running.
390
369
391
If a checker already exists, leave it running and do
370
392
nothing."""
371
393
# The reason for not killing a running checker is that if we
376
398
# checkers alone, the checker would have to take more time
377
399
# than 'timeout' for the client to be declared invalid, which
378
400
# is as it should be.
401
402
# If a checker exists, make sure it is not a zombie
403
try:
404
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
405
except (AttributeError, OSError), error:
406
if (isinstance(error, OSError)
407
and error.errno != errno.ECHILD):
408
raise error
409
else:
410
if pid:
411
logger.warning(u"Checker was a zombie")
412
gobject.source_remove(self.checker_callback_tag)
413
self.checker_callback(pid, status,
414
self.current_checker_command)
415
# Start a new checker if needed
379
416
if self.checker is None:
380
417
try:
381
418
# In case checker_command has exactly one % operator
382
419
command = self.checker_command % self.host
383
420
except TypeError:
384
421
# Escape attributes for the shell
385
escaped_attrs = dict((key, re.escape(str(val)))
422
escaped_attrs = dict((key,
423
re.escape(unicode(str(val),
424
errors=
425
u'replace')))
386
426
for key, val in
387
427
vars(self).iteritems())
388
428
try:
391
431
logger.error(u'Could not format string "%s":'
392
432
u' %s', self.checker_command, error)
393
433
return True # Try again later
434
self.current_checker_command = command
394
435
try:
395
436
logger.info(u"Starting checker %r for %s",
396
437
command, self.name)
400
441
# always replaced by /dev/null.)
401
442
self.checker = subprocess.Popen(command,
402
443
close_fds=True,
403
shell=True, cwd="/")
404
if self.use_dbus:
405
# Emit D-Bus signal
406
self.CheckerStarted(command)
407
self.PropertyChanged(
408
dbus.String("checker_running"),
409
dbus.Boolean(True, variant_level=1))
444
shell=True, cwd=u"/")
410
445
self.checker_callback_tag = (gobject.child_watch_add
411
446
(self.checker.pid,
412
447
self.checker_callback,
413
448
data=command))
449
# The checker may have completed before the gobject
450
# watch was added. Check for this.
451
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
452
if pid:
453
gobject.source_remove(self.checker_callback_tag)
454
self.checker_callback(pid, status, command)
414
455
except OSError, error:
415
456
logger.error(u"Failed to start subprocess: %s",
416
457
error)
422
463
if self.checker_callback_tag:
423
464
gobject.source_remove(self.checker_callback_tag)
424
465
self.checker_callback_tag = None
425
if getattr(self, "checker", None) is None:
466
if getattr(self, u"checker", None) is None:
426
467
return
427
468
logger.debug(u"Stopping checker for %(name)s", vars(self))
428
469
try:
429
470
os.kill(self.checker.pid, signal.SIGTERM)
430
#os.sleep(0.5)
471
#time.sleep(0.5)
431
472
#if self.checker.poll() is None:
432
473
# os.kill(self.checker.pid, signal.SIGKILL)
433
474
except OSError, error:
434
475
if error.errno != errno.ESRCH: # No such process
435
476
raise
436
477
self.checker = None
437
if self.use_dbus:
438
self.PropertyChanged(dbus.String(u"checker_running"),
439
dbus.Boolean(False, variant_level=1))
440
478
441
479
def still_valid(self):
442
480
"""Has the timeout not yet passed for this client?"""
443
if not getattr(self, "enabled", False):
481
if not getattr(self, u"enabled", False):
444
482
return False
445
483
now = datetime.datetime.utcnow()
446
484
if self.last_checked_ok is None:
447
485
return now < (self.created + self.timeout)
448
486
else:
449
487
return now < (self.last_checked_ok + self.timeout)
488
489
490
def dbus_service_property(dbus_interface, signature=u"v",
491
access=u"readwrite", byte_arrays=False):
492
"""Decorators for marking methods of a DBusObjectWithProperties to
493
become properties on the D-Bus.
494
495
The decorated method will be called with no arguments by "Get"
496
and with one argument by "Set".
497
498
The parameters, where they are supported, are the same as
499
dbus.service.method, except there is only "signature", since the
500
type from Get() and the type sent to Set() is the same.
501
"""
502
def decorator(func):
503
func._dbus_is_property = True
504
func._dbus_interface = dbus_interface
505
func._dbus_signature = signature
506
func._dbus_access = access
507
func._dbus_name = func.__name__
508
if func._dbus_name.endswith(u"_dbus_property"):
509
func._dbus_name = func._dbus_name[:-14]
510
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
511
return func
512
return decorator
513
514
515
class DBusPropertyException(dbus.exceptions.DBusException):
516
"""A base class for D-Bus property-related exceptions
517
"""
518
def __unicode__(self):
519
return unicode(str(self))
520
521
522
class DBusPropertyAccessException(DBusPropertyException):
523
"""A property's access permissions disallows an operation.
524
"""
525
pass
526
527
528
class DBusPropertyNotFound(DBusPropertyException):
529
"""An attempt was made to access a non-existing property.
530
"""
531
pass
532
533
534
class DBusObjectWithProperties(dbus.service.Object):
535
"""A D-Bus object with properties.
536
537
Classes inheriting from this can use the dbus_service_property
538
decorator to expose methods as D-Bus properties. It exposes the
539
standard Get(), Set(), and GetAll() methods on the D-Bus.
540
"""
541
542
@staticmethod
543
def _is_dbus_property(obj):
544
return getattr(obj, u"_dbus_is_property", False)
545
546
def _get_all_dbus_properties(self):
547
"""Returns a generator of (name, attribute) pairs
548
"""
549
return ((prop._dbus_name, prop)
550
for name, prop in
551
inspect.getmembers(self, self._is_dbus_property))
552
553
def _get_dbus_property(self, interface_name, property_name):
554
"""Returns a bound method if one exists which is a D-Bus
555
property with the specified name and interface.
556
"""
557
for name in (property_name,
558
property_name + u"_dbus_property"):
559
prop = getattr(self, name, None)
560
if (prop is None
561
or not self._is_dbus_property(prop)
562
or prop._dbus_name != property_name
563
or (interface_name and prop._dbus_interface
564
and interface_name != prop._dbus_interface)):
565
continue
566
return prop
567
# No such property
568
raise DBusPropertyNotFound(self.dbus_object_path + u":"
569
+ interface_name + u"."
570
+ property_name)
571
572
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
573
out_signature=u"v")
574
def Get(self, interface_name, property_name):
575
"""Standard D-Bus property Get() method, see D-Bus standard.
576
"""
577
prop = self._get_dbus_property(interface_name, property_name)
578
if prop._dbus_access == u"write":
579
raise DBusPropertyAccessException(property_name)
580
value = prop()
581
if not hasattr(value, u"variant_level"):
582
return value
583
return type(value)(value, variant_level=value.variant_level+1)
584
585
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
586
def Set(self, interface_name, property_name, value):
587
"""Standard D-Bus property Set() method, see D-Bus standard.
588
"""
589
prop = self._get_dbus_property(interface_name, property_name)
590
if prop._dbus_access == u"read":
591
raise DBusPropertyAccessException(property_name)
592
if prop._dbus_get_args_options[u"byte_arrays"]:
593
value = dbus.ByteArray(''.join(unichr(byte)
594
for byte in value))
595
prop(value)
596
597
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
598
out_signature=u"a{sv}")
599
def GetAll(self, interface_name):
600
"""Standard D-Bus property GetAll() method, see D-Bus
601
standard.
602
603
Note: Will not include properties with access="write".
604
"""
605
all = {}
606
for name, prop in self._get_all_dbus_properties():
607
if (interface_name
608
and interface_name != prop._dbus_interface):
609
# Interface non-empty but did not match
610
continue
611
# Ignore write-only properties
612
if prop._dbus_access == u"write":
613
continue
614
value = prop()
615
if not hasattr(value, u"variant_level"):
616
all[name] = value
617
continue
618
all[name] = type(value)(value, variant_level=
619
value.variant_level+1)
620
return dbus.Dictionary(all, signature=u"sv")
621
622
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
623
out_signature=u"s",
624
path_keyword='object_path',
625
connection_keyword='connection')
626
def Introspect(self, object_path, connection):
627
"""Standard D-Bus method, overloaded to insert property tags.
628
"""
629
xmlstring = dbus.service.Object.Introspect(self, object_path,
630
connection)
631
try:
632
document = xml.dom.minidom.parseString(xmlstring)
633
def make_tag(document, name, prop):
634
e = document.createElement(u"property")
635
e.setAttribute(u"name", name)
636
e.setAttribute(u"type", prop._dbus_signature)
637
e.setAttribute(u"access", prop._dbus_access)
638
return e
639
for if_tag in document.getElementsByTagName(u"interface"):
640
for tag in (make_tag(document, name, prop)
641
for name, prop
642
in self._get_all_dbus_properties()
643
if prop._dbus_interface
644
== if_tag.getAttribute(u"name")):
645
if_tag.appendChild(tag)
646
# Add the names to the return values for the
647
# "org.freedesktop.DBus.Properties" methods
648
if (if_tag.getAttribute(u"name")
649
== u"org.freedesktop.DBus.Properties"):
650
for cn in if_tag.getElementsByTagName(u"method"):
651
if cn.getAttribute(u"name") == u"Get":
652
for arg in cn.getElementsByTagName(u"arg"):
653
if (arg.getAttribute(u"direction")
654
== u"out"):
655
arg.setAttribute(u"name", u"value")
656
elif cn.getAttribute(u"name") == u"GetAll":
657
for arg in cn.getElementsByTagName(u"arg"):
658
if (arg.getAttribute(u"direction")
659
== u"out"):
660
arg.setAttribute(u"name", u"props")
661
xmlstring = document.toxml(u"utf-8")
662
document.unlink()
663
except (AttributeError, xml.dom.DOMException,
664
xml.parsers.expat.ExpatError), error:
665
logger.error(u"Failed to override Introspection method",
666
error)
667
return xmlstring
668
669
670
class ClientDBus(Client, DBusObjectWithProperties):
671
"""A Client class using D-Bus
672
673
Attributes:
674
dbus_object_path: dbus.ObjectPath
675
bus: dbus.SystemBus()
676
"""
677
# dbus.service.Object doesn't use super(), so we can't either.
678
679
def __init__(self, bus = None, *args, **kwargs):
680
self.bus = bus
681
Client.__init__(self, *args, **kwargs)
682
# Only now, when this client is initialized, can it show up on
683
# the D-Bus
684
self.dbus_object_path = (dbus.ObjectPath
685
(u"/clients/"
686
+ self.name.replace(u".", u"_")))
687
DBusObjectWithProperties.__init__(self, self.bus,
688
self.dbus_object_path)
689
690
@staticmethod
691
def _datetime_to_dbus(dt, variant_level=0):
692
"""Convert a UTC datetime.datetime() to a D-Bus type."""
693
return dbus.String(dt.isoformat(),
694
variant_level=variant_level)
695
696
def enable(self):
697
oldstate = getattr(self, u"enabled", False)
698
r = Client.enable(self)
699
if oldstate != self.enabled:
700
# Emit D-Bus signals
701
self.PropertyChanged(dbus.String(u"enabled"),
702
dbus.Boolean(True, variant_level=1))
703
self.PropertyChanged(
704
dbus.String(u"last_enabled"),
705
self._datetime_to_dbus(self.last_enabled,
706
variant_level=1))
707
return r
708
709
def disable(self, quiet = False):
710
oldstate = getattr(self, u"enabled", False)
711
r = Client.disable(self, quiet=quiet)
712
if not quiet and oldstate != self.enabled:
713
# Emit D-Bus signal
714
self.PropertyChanged(dbus.String(u"enabled"),
715
dbus.Boolean(False, variant_level=1))
716
return r
717
718
def __del__(self, *args, **kwargs):
719
try:
720
self.remove_from_connection()
721
except LookupError:
722
pass
723
if hasattr(DBusObjectWithProperties, u"__del__"):
724
DBusObjectWithProperties.__del__(self, *args, **kwargs)
725
Client.__del__(self, *args, **kwargs)
726
727
def checker_callback(self, pid, condition, command,
728
*args, **kwargs):
729
self.checker_callback_tag = None
730
self.checker = None
731
# Emit D-Bus signal
732
self.PropertyChanged(dbus.String(u"checker_running"),
733
dbus.Boolean(False, variant_level=1))
734
if os.WIFEXITED(condition):
735
exitstatus = os.WEXITSTATUS(condition)
736
# Emit D-Bus signal
737
self.CheckerCompleted(dbus.Int16(exitstatus),
738
dbus.Int64(condition),
739
dbus.String(command))
740
else:
741
# Emit D-Bus signal
742
self.CheckerCompleted(dbus.Int16(-1),
743
dbus.Int64(condition),
744
dbus.String(command))
745
746
return Client.checker_callback(self, pid, condition, command,
747
*args, **kwargs)
748
749
def checked_ok(self, *args, **kwargs):
750
r = Client.checked_ok(self, *args, **kwargs)
751
# Emit D-Bus signal
752
self.PropertyChanged(
753
dbus.String(u"last_checked_ok"),
754
(self._datetime_to_dbus(self.last_checked_ok,
755
variant_level=1)))
756
return r
757
758
def start_checker(self, *args, **kwargs):
759
old_checker = self.checker
760
if self.checker is not None:
761
old_checker_pid = self.checker.pid
762
else:
763
old_checker_pid = None
764
r = Client.start_checker(self, *args, **kwargs)
765
# Only if new checker process was started
766
if (self.checker is not None
767
and old_checker_pid != self.checker.pid):
768
# Emit D-Bus signal
769
self.CheckerStarted(self.current_checker_command)
770
self.PropertyChanged(
771
dbus.String(u"checker_running"),
772
dbus.Boolean(True, variant_level=1))
773
return r
774
775
def stop_checker(self, *args, **kwargs):
776
old_checker = getattr(self, u"checker", None)
777
r = Client.stop_checker(self, *args, **kwargs)
778
if (old_checker is not None
779
and getattr(self, u"checker", None) is None):
780
self.PropertyChanged(dbus.String(u"checker_running"),
781
dbus.Boolean(False, variant_level=1))
782
return r
450
783
451
784
## D-Bus methods & signals
452
785
_interface = u"se.bsnet.fukt.Mandos.Client"
453
786
454
787
# CheckedOK - method
455
CheckedOK = dbus.service.method(_interface)(checked_ok)
456
CheckedOK.__name__ = "CheckedOK"
788
@dbus.service.method(_interface)
789
def CheckedOK(self):
790
return self.checked_ok()
457
791
458
792
# CheckerCompleted - signal
459
@dbus.service.signal(_interface, signature="nxs")
793
@dbus.service.signal(_interface, signature=u"nxs")
460
794
def CheckerCompleted(self, exitcode, waitstatus, command):
461
795
"D-Bus signal"
462
796
pass
463
797
464
798
# CheckerStarted - signal
465
@dbus.service.signal(_interface, signature="s")
799
@dbus.service.signal(_interface, signature=u"s")
466
800
def CheckerStarted(self, command):
467
801
"D-Bus signal"
468
802
pass
469
803
470
# GetAllProperties - method
471
@dbus.service.method(_interface, out_signature="a{sv}")
472
def GetAllProperties(self):
473
"D-Bus method"
474
return dbus.Dictionary({
475
dbus.String("name"):
476
dbus.String(self.name, variant_level=1),
477
dbus.String("fingerprint"):
478
dbus.String(self.fingerprint, variant_level=1),
479
dbus.String("host"):
480
dbus.String(self.host, variant_level=1),
481
dbus.String("created"):
482
_datetime_to_dbus(self.created, variant_level=1),
483
dbus.String("last_enabled"):
484
(_datetime_to_dbus(self.last_enabled,
485
variant_level=1)
486
if self.last_enabled is not None
487
else dbus.Boolean(False, variant_level=1)),
488
dbus.String("enabled"):
489
dbus.Boolean(self.enabled, variant_level=1),
490
dbus.String("last_checked_ok"):
491
(_datetime_to_dbus(self.last_checked_ok,
492
variant_level=1)
493
if self.last_checked_ok is not None
494
else dbus.Boolean (False, variant_level=1)),
495
dbus.String("timeout"):
496
dbus.UInt64(self.timeout_milliseconds(),
497
variant_level=1),
498
dbus.String("interval"):
499
dbus.UInt64(self.interval_milliseconds(),
500
variant_level=1),
501
dbus.String("checker"):
502
dbus.String(self.checker_command,
503
variant_level=1),
504
dbus.String("checker_running"):
505
dbus.Boolean(self.checker is not None,
506
variant_level=1),
507
dbus.String("object_path"):
508
dbus.ObjectPath(self.dbus_object_path,
509
variant_level=1)
510
}, signature="sv")
511
512
# IsStillValid - method
513
IsStillValid = (dbus.service.method(_interface, out_signature="b")
514
(still_valid))
515
IsStillValid.__name__ = "IsStillValid"
516
517
804
# PropertyChanged - signal
518
@dbus.service.signal(_interface, signature="sv")
805
@dbus.service.signal(_interface, signature=u"sv")
519
806
def PropertyChanged(self, property, value):
520
807
"D-Bus signal"
521
808
pass
522
809
523
# SetChecker - method
524
@dbus.service.method(_interface, in_signature="s")
525
def SetChecker(self, checker):
526
"D-Bus setter method"
527
self.checker_command = checker
528
# Emit D-Bus signal
529
self.PropertyChanged(dbus.String(u"checker"),
530
dbus.String(self.checker_command,
531
variant_level=1))
532
533
# SetHost - method
534
@dbus.service.method(_interface, in_signature="s")
535
def SetHost(self, host):
536
"D-Bus setter method"
537
self.host = host
538
# Emit D-Bus signal
539
self.PropertyChanged(dbus.String(u"host"),
540
dbus.String(self.host, variant_level=1))
541
542
# SetInterval - method
543
@dbus.service.method(_interface, in_signature="t")
544
def SetInterval(self, milliseconds):
545
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
546
# Emit D-Bus signal
547
self.PropertyChanged(dbus.String(u"interval"),
548
(dbus.UInt64(self.interval_milliseconds(),
549
variant_level=1)))
550
551
# SetSecret - method
552
@dbus.service.method(_interface, in_signature="ay",
553
byte_arrays=True)
554
def SetSecret(self, secret):
555
"D-Bus setter method"
556
self.secret = str(secret)
557
558
# SetTimeout - method
559
@dbus.service.method(_interface, in_signature="t")
560
def SetTimeout(self, milliseconds):
561
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
562
# Emit D-Bus signal
563
self.PropertyChanged(dbus.String(u"timeout"),
564
(dbus.UInt64(self.timeout_milliseconds(),
565
variant_level=1)))
810
# GotSecret - signal
811
@dbus.service.signal(_interface)
812
def GotSecret(self):
813
"D-Bus signal"
814
pass
815
816
# Rejected - signal
817
@dbus.service.signal(_interface)
818
def Rejected(self):
819
"D-Bus signal"
820
pass
566
821
567
822
# Enable - method
568
Enable = dbus.service.method(_interface)(enable)
569
Enable.__name__ = "Enable"
823
@dbus.service.method(_interface)
824
def Enable(self):
825
"D-Bus method"
826
self.enable()
570
827
571
828
# StartChecker - method
572
829
@dbus.service.method(_interface)
581
838
self.disable()
582
839
583
840
# StopChecker - method
584
StopChecker = dbus.service.method(_interface)(stop_checker)
585
StopChecker.__name__ = "StopChecker"
841
@dbus.service.method(_interface)
842
def StopChecker(self):
843
self.stop_checker()
844
845
# name - property
846
@dbus_service_property(_interface, signature=u"s", access=u"read")
847
def name_dbus_property(self):
848
return dbus.String(self.name)
849
850
# fingerprint - property
851
@dbus_service_property(_interface, signature=u"s", access=u"read")
852
def fingerprint_dbus_property(self):
853
return dbus.String(self.fingerprint)
854
855
# host - property
856
@dbus_service_property(_interface, signature=u"s",
857
access=u"readwrite")
858
def host_dbus_property(self, value=None):
859
if value is None: # get
860
return dbus.String(self.host)
861
self.host = value
862
# Emit D-Bus signal
863
self.PropertyChanged(dbus.String(u"host"),
864
dbus.String(value, variant_level=1))
865
866
# created - property
867
@dbus_service_property(_interface, signature=u"s", access=u"read")
868
def created_dbus_property(self):
869
return dbus.String(self._datetime_to_dbus(self.created))
870
871
# last_enabled - property
872
@dbus_service_property(_interface, signature=u"s", access=u"read")
873
def last_enabled_dbus_property(self):
874
if self.last_enabled is None:
875
return dbus.String(u"")
876
return dbus.String(self._datetime_to_dbus(self.last_enabled))
877
878
# enabled - property
879
@dbus_service_property(_interface, signature=u"b",
880
access=u"readwrite")
881
def enabled_dbus_property(self, value=None):
882
if value is None: # get
883
return dbus.Boolean(self.enabled)
884
if value:
885
self.enable()
886
else:
887
self.disable()
888
889
# last_checked_ok - property
890
@dbus_service_property(_interface, signature=u"s",
891
access=u"readwrite")
892
def last_checked_ok_dbus_property(self, value=None):
893
if value is not None:
894
self.checked_ok()
895
return
896
if self.last_checked_ok is None:
897
return dbus.String(u"")
898
return dbus.String(self._datetime_to_dbus(self
899
.last_checked_ok))
900
901
# timeout - property
902
@dbus_service_property(_interface, signature=u"t",
903
access=u"readwrite")
904
def timeout_dbus_property(self, value=None):
905
if value is None: # get
906
return dbus.UInt64(self.timeout_milliseconds())
907
self.timeout = datetime.timedelta(0, 0, 0, value)
908
# Emit D-Bus signal
909
self.PropertyChanged(dbus.String(u"timeout"),
910
dbus.UInt64(value, variant_level=1))
911
if getattr(self, u"disable_initiator_tag", None) is None:
912
return
913
# Reschedule timeout
914
gobject.source_remove(self.disable_initiator_tag)
915
self.disable_initiator_tag = None
916
time_to_die = (self.
917
_timedelta_to_milliseconds((self
918
.last_checked_ok
919
+ self.timeout)
920
- datetime.datetime
921
.utcnow()))
922
if time_to_die <= 0:
923
# The timeout has passed
924
self.disable()
925
else:
926
self.disable_initiator_tag = (gobject.timeout_add
927
(time_to_die, self.disable))
928
929
# interval - property
930
@dbus_service_property(_interface, signature=u"t",
931
access=u"readwrite")
932
def interval_dbus_property(self, value=None):
933
if value is None: # get
934
return dbus.UInt64(self.interval_milliseconds())
935
self.interval = datetime.timedelta(0, 0, 0, value)
936
# Emit D-Bus signal
937
self.PropertyChanged(dbus.String(u"interval"),
938
dbus.UInt64(value, variant_level=1))
939
if getattr(self, u"checker_initiator_tag", None) is None:
940
return
941
# Reschedule checker run
942
gobject.source_remove(self.checker_initiator_tag)
943
self.checker_initiator_tag = (gobject.timeout_add
944
(value, self.start_checker))
945
self.start_checker() # Start one now, too
946
947
# checker - property
948
@dbus_service_property(_interface, signature=u"s",
949
access=u"readwrite")
950
def checker_dbus_property(self, value=None):
951
if value is None: # get
952
return dbus.String(self.checker_command)
953
self.checker_command = value
954
# Emit D-Bus signal
955
self.PropertyChanged(dbus.String(u"checker"),
956
dbus.String(self.checker_command,
957
variant_level=1))
958
959
# checker_running - property
960
@dbus_service_property(_interface, signature=u"b",
961
access=u"readwrite")
962
def checker_running_dbus_property(self, value=None):
963
if value is None: # get
964
return dbus.Boolean(self.checker is not None)
965
if value:
966
self.start_checker()
967
else:
968
self.stop_checker()
969
970
# object_path - property
971
@dbus_service_property(_interface, signature=u"o", access=u"read")
972
def object_path_dbus_property(self):
973
return self.dbus_object_path # is already a dbus.ObjectPath
974
975
# secret = property
976
@dbus_service_property(_interface, signature=u"ay",
977
access=u"write", byte_arrays=True)
978
def secret_dbus_property(self, value):
979
self.secret = str(value)
586
980
587
981
del _interface
588
982
589
983
590
def peer_certificate(session):
591
"Return the peer's OpenPGP certificate as a bytestring"
592
# If not an OpenPGP certificate...
593
if (gnutls.library.functions
594
.gnutls_certificate_type_get(session._c_object)
595
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
596
# ...do the normal thing
597
return session.peer_certificate
598
list_size = ctypes.c_uint(1)
599
cert_list = (gnutls.library.functions
600
.gnutls_certificate_get_peers
601
(session._c_object, ctypes.byref(list_size)))
602
if not bool(cert_list) and list_size.value != 0:
603
raise gnutls.errors.GNUTLSError("error getting peer"
604
" certificate")
605
if list_size.value == 0:
606
return None
607
cert = cert_list[0]
608
return ctypes.string_at(cert.data, cert.size)
609
610
611
def fingerprint(openpgp):
612
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
613
# New GnuTLS "datum" with the OpenPGP public key
614
datum = (gnutls.library.types
615
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
616
ctypes.POINTER
617
(ctypes.c_ubyte)),
618
ctypes.c_uint(len(openpgp))))
619
# New empty GnuTLS certificate
620
crt = gnutls.library.types.gnutls_openpgp_crt_t()
621
(gnutls.library.functions
622
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
623
# Import the OpenPGP public key into the certificate
624
(gnutls.library.functions
625
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
626
gnutls.library.constants
627
.GNUTLS_OPENPGP_FMT_RAW))
628
# Verify the self signature in the key
629
crtverify = ctypes.c_uint()
630
(gnutls.library.functions
631
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
632
if crtverify.value != 0:
633
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
634
raise gnutls.errors.CertificateSecurityError("Verify failed")
635
# New buffer for the fingerprint
636
buf = ctypes.create_string_buffer(20)
637
buf_len = ctypes.c_size_t()
638
# Get the fingerprint from the certificate into the buffer
639
(gnutls.library.functions
640
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
641
ctypes.byref(buf_len)))
642
# Deinit the certificate
643
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
644
# Convert the buffer to a Python bytestring
645
fpr = ctypes.string_at(buf, buf_len.value)
646
# Convert the bytestring to hexadecimal notation
647
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
648
return hex_fpr
649
650
651
class TCP_handler(SocketServer.BaseRequestHandler, object):
652
"""A TCP request handler class.
653
Instantiated by IPv6_TCPServer for each request to handle it.
984
class ClientHandler(socketserver.BaseRequestHandler, object):
985
"""A class to handle client connections.
986
987
Instantiated once for each connection to handle it.
654
988
Note: This will run in its own forked process."""
655
989
656
990
def handle(self):
657
991
logger.info(u"TCP connection from: %s",
658
992
unicode(self.client_address))
659
session = (gnutls.connection
660
.ClientSession(self.request,
661
gnutls.connection
662
.X509Credentials()))
663
664
line = self.request.makefile().readline()
665
logger.debug(u"Protocol version: %r", line)
666
try:
667
if int(line.strip().split()[0]) > 1:
668
raise RuntimeError
669
except (ValueError, IndexError, RuntimeError), error:
670
logger.error(u"Unknown protocol version: %s", error)
671
return
672
673
# Note: gnutls.connection.X509Credentials is really a generic
674
# GnuTLS certificate credentials object so long as no X.509
675
# keys are added to it. Therefore, we can use it here despite
676
# using OpenPGP certificates.
677
678
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
679
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
680
# "+DHE-DSS"))
681
# Use a fallback default, since this MUST be set.
682
priority = self.server.settings.get("priority", "NORMAL")
683
(gnutls.library.functions
684
.gnutls_priority_set_direct(session._c_object,
685
priority, None))
686
687
try:
688
session.handshake()
689
except gnutls.errors.GNUTLSError, error:
690
logger.warning(u"Handshake failed: %s", error)
691
# Do not run session.bye() here: the session is not
692
# established. Just abandon the request.
693
return
694
logger.debug(u"Handshake succeeded")
695
try:
696
fpr = fingerprint(peer_certificate(session))
697
except (TypeError, gnutls.errors.GNUTLSError), error:
698
logger.warning(u"Bad certificate: %s", error)
699
session.bye()
700
return
701
logger.debug(u"Fingerprint: %s", fpr)
702
for c in self.server.clients:
703
if c.fingerprint == fpr:
704
client = c
705
break
706
else:
707
logger.warning(u"Client not found for fingerprint: %s",
708
fpr)
709
session.bye()
710
return
711
# Have to check if client.still_valid(), since it is possible
712
# that the client timed out while establishing the GnuTLS
713
# session.
714
if not client.still_valid():
715
logger.warning(u"Client %(name)s is invalid",
716
vars(client))
717
session.bye()
718
return
719
## This won't work here, since we're in a fork.
720
# client.checked_ok()
721
sent_size = 0
722
while sent_size < len(client.secret):
723
sent = session.send(client.secret[sent_size:])
724
logger.debug(u"Sent: %d, remaining: %d",
725
sent, len(client.secret)
726
- (sent_size + sent))
727
sent_size += sent
728
session.bye()
729
730
731
class IPv6_TCPServer(SocketServer.ForkingMixIn,
732
SocketServer.TCPServer, object):
733
"""IPv6 TCP server. Accepts 'None' as address and/or port.
993
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
994
# Open IPC pipe to parent process
995
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
996
session = (gnutls.connection
997
.ClientSession(self.request,
998
gnutls.connection
999
.X509Credentials()))
1000
1001
line = self.request.makefile().readline()
1002
logger.debug(u"Protocol version: %r", line)
1003
try:
1004
if int(line.strip().split()[0]) > 1:
1005
raise RuntimeError
1006
except (ValueError, IndexError, RuntimeError), error:
1007
logger.error(u"Unknown protocol version: %s", error)
1008
return
1009
1010
# Note: gnutls.connection.X509Credentials is really a
1011
# generic GnuTLS certificate credentials object so long as
1012
# no X.509 keys are added to it. Therefore, we can use it
1013
# here despite using OpenPGP certificates.
1014
1015
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1016
# u"+AES-256-CBC", u"+SHA1",
1017
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1018
# u"+DHE-DSS"))
1019
# Use a fallback default, since this MUST be set.
1020
priority = self.server.gnutls_priority
1021
if priority is None:
1022
priority = u"NORMAL"
1023
(gnutls.library.functions
1024
.gnutls_priority_set_direct(session._c_object,
1025
priority, None))
1026
1027
try:
1028
session.handshake()
1029
except gnutls.errors.GNUTLSError, error:
1030
logger.warning(u"Handshake failed: %s", error)
1031
# Do not run session.bye() here: the session is not
1032
# established. Just abandon the request.
1033
return
1034
logger.debug(u"Handshake succeeded")
1035
try:
1036
fpr = self.fingerprint(self.peer_certificate(session))
1037
except (TypeError, gnutls.errors.GNUTLSError), error:
1038
logger.warning(u"Bad certificate: %s", error)
1039
session.bye()
1040
return
1041
logger.debug(u"Fingerprint: %s", fpr)
1042
1043
for c in self.server.clients:
1044
if c.fingerprint == fpr:
1045
client = c
1046
break
1047
else:
1048
ipc.write(u"NOTFOUND %s %s\n"
1049
% (fpr, unicode(self.client_address)))
1050
session.bye()
1051
return
1052
# Have to check if client.still_valid(), since it is
1053
# possible that the client timed out while establishing
1054
# the GnuTLS session.
1055
if not client.still_valid():
1056
ipc.write(u"INVALID %s\n" % client.name)
1057
session.bye()
1058
return
1059
ipc.write(u"SENDING %s\n" % client.name)
1060
sent_size = 0
1061
while sent_size < len(client.secret):
1062
sent = session.send(client.secret[sent_size:])
1063
logger.debug(u"Sent: %d, remaining: %d",
1064
sent, len(client.secret)
1065
- (sent_size + sent))
1066
sent_size += sent
1067
session.bye()
1068
1069
@staticmethod
1070
def peer_certificate(session):
1071
"Return the peer's OpenPGP certificate as a bytestring"
1072
# If not an OpenPGP certificate...
1073
if (gnutls.library.functions
1074
.gnutls_certificate_type_get(session._c_object)
1075
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1076
# ...do the normal thing
1077
return session.peer_certificate
1078
list_size = ctypes.c_uint(1)
1079
cert_list = (gnutls.library.functions
1080
.gnutls_certificate_get_peers
1081
(session._c_object, ctypes.byref(list_size)))
1082
if not bool(cert_list) and list_size.value != 0:
1083
raise gnutls.errors.GNUTLSError(u"error getting peer"
1084
u" certificate")
1085
if list_size.value == 0:
1086
return None
1087
cert = cert_list[0]
1088
return ctypes.string_at(cert.data, cert.size)
1089
1090
@staticmethod
1091
def fingerprint(openpgp):
1092
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1093
# New GnuTLS "datum" with the OpenPGP public key
1094
datum = (gnutls.library.types
1095
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1096
ctypes.POINTER
1097
(ctypes.c_ubyte)),
1098
ctypes.c_uint(len(openpgp))))
1099
# New empty GnuTLS certificate
1100
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1101
(gnutls.library.functions
1102
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1103
# Import the OpenPGP public key into the certificate
1104
(gnutls.library.functions
1105
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1106
gnutls.library.constants
1107
.GNUTLS_OPENPGP_FMT_RAW))
1108
# Verify the self signature in the key
1109
crtverify = ctypes.c_uint()
1110
(gnutls.library.functions
1111
.gnutls_openpgp_crt_verify_self(crt, 0,
1112
ctypes.byref(crtverify)))
1113
if crtverify.value != 0:
1114
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1115
raise (gnutls.errors.CertificateSecurityError
1116
(u"Verify failed"))
1117
# New buffer for the fingerprint
1118
buf = ctypes.create_string_buffer(20)
1119
buf_len = ctypes.c_size_t()
1120
# Get the fingerprint from the certificate into the buffer
1121
(gnutls.library.functions
1122
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1123
ctypes.byref(buf_len)))
1124
# Deinit the certificate
1125
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1126
# Convert the buffer to a Python bytestring
1127
fpr = ctypes.string_at(buf, buf_len.value)
1128
# Convert the bytestring to hexadecimal notation
1129
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1130
return hex_fpr
1131
1132
1133
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1134
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1135
def process_request(self, request, client_address):
1136
"""Overrides and wraps the original process_request().
1137
1138
This function creates a new pipe in self.pipe
1139
"""
1140
self.pipe = os.pipe()
1141
super(ForkingMixInWithPipe,
1142
self).process_request(request, client_address)
1143
os.close(self.pipe[1]) # close write end
1144
self.add_pipe(self.pipe[0])
1145
def add_pipe(self, pipe):
1146
"""Dummy function; override as necessary"""
1147
os.close(pipe)
1148
1149
1150
class IPv6_TCPServer(ForkingMixInWithPipe,
1151
socketserver.TCPServer, object):
1152
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1153
734
1154
Attributes:
735
settings: Server settings
736
clients: Set() of Client objects
737
1155
enabled: Boolean; whether this server is activated yet
1156
interface: None or a network interface name (string)
1157
use_ipv6: Boolean; to use IPv6 or not
738
1158
"""
739
address_family = socket.AF_INET6
740
def __init__(self, *args, **kwargs):
741
if "settings" in kwargs:
742
self.settings = kwargs["settings"]
743
del kwargs["settings"]
744
if "clients" in kwargs:
745
self.clients = kwargs["clients"]
746
del kwargs["clients"]
747
self.enabled = False
748
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1159
def __init__(self, server_address, RequestHandlerClass,
1160
interface=None, use_ipv6=True):
1161
self.interface = interface
1162
if use_ipv6:
1163
self.address_family = socket.AF_INET6
1164
socketserver.TCPServer.__init__(self, server_address,
1165
RequestHandlerClass)
749
1166
def server_bind(self):
750
1167
"""This overrides the normal server_bind() function
751
1168
to bind to an interface if one was specified, and also NOT to
752
1169
bind to an address or port if they were not specified."""
753
if self.settings["interface"]:
754
# 25 is from /usr/include/asm-i486/socket.h
755
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
756
try:
757
self.socket.setsockopt(socket.SOL_SOCKET,
758
SO_BINDTODEVICE,
759
self.settings["interface"])
760
except socket.error, error:
761
if error[0] == errno.EPERM:
762
logger.error(u"No permission to"
763
u" bind to interface %s",
764
self.settings["interface"])
765
else:
766
raise error
1170
if self.interface is not None:
1171
if SO_BINDTODEVICE is None:
1172
logger.error(u"SO_BINDTODEVICE does not exist;"
1173
u" cannot bind to interface %s",
1174
self.interface)
1175
else:
1176
try:
1177
self.socket.setsockopt(socket.SOL_SOCKET,
1178
SO_BINDTODEVICE,
1179
str(self.interface
1180
+ u'\0'))
1181
except socket.error, error:
1182
if error[0] == errno.EPERM:
1183
logger.error(u"No permission to"
1184
u" bind to interface %s",
1185
self.interface)
1186
elif error[0] == errno.ENOPROTOOPT:
1187
logger.error(u"SO_BINDTODEVICE not available;"
1188
u" cannot bind to interface %s",
1189
self.interface)
1190
else:
1191
raise
767
1192
# Only bind(2) the socket if we really need to.
768
1193
if self.server_address[0] or self.server_address[1]:
769
1194
if not self.server_address[0]:
770
in6addr_any = "::"
771
self.server_address = (in6addr_any,
1195
if self.address_family == socket.AF_INET6:
1196
any_address = u"::" # in6addr_any
1197
else:
1198
any_address = socket.INADDR_ANY
1199
self.server_address = (any_address,
772
1200
self.server_address[1])
773
1201
elif not self.server_address[1]:
774
1202
self.server_address = (self.server_address[0],
775
1203
0)
776
# if self.settings["interface"]:
1204
# if self.interface:
777
1205
# self.server_address = (self.server_address[0],
778
1206
# 0, # port
779
1207
# 0, # flowinfo
780
1208
# if_nametoindex
781
# (self.settings
782
# ["interface"]))
783
return super(IPv6_TCPServer, self).server_bind()
1209
# (self.interface))
1210
return socketserver.TCPServer.server_bind(self)
1211
1212
1213
class MandosServer(IPv6_TCPServer):
1214
"""Mandos server.
1215
1216
Attributes:
1217
clients: set of Client objects
1218
gnutls_priority GnuTLS priority string
1219
use_dbus: Boolean; to emit D-Bus signals or not
1220
1221
Assumes a gobject.MainLoop event loop.
1222
"""
1223
def __init__(self, server_address, RequestHandlerClass,
1224
interface=None, use_ipv6=True, clients=None,
1225
gnutls_priority=None, use_dbus=True):
1226
self.enabled = False
1227
self.clients = clients
1228
if self.clients is None:
1229
self.clients = set()
1230
self.use_dbus = use_dbus
1231
self.gnutls_priority = gnutls_priority
1232
IPv6_TCPServer.__init__(self, server_address,
1233
RequestHandlerClass,
1234
interface = interface,
1235
use_ipv6 = use_ipv6)
784
1236
def server_activate(self):
785
1237
if self.enabled:
786
return super(IPv6_TCPServer, self).server_activate()
1238
return socketserver.TCPServer.server_activate(self)
787
1239
def enable(self):
788
1240
self.enabled = True
1241
def add_pipe(self, pipe):
1242
# Call "handle_ipc" for both data and EOF events
1243
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1244
self.handle_ipc)
1245
def handle_ipc(self, source, condition, file_objects={}):
1246
condition_names = {
1247
gobject.IO_IN: u"IN", # There is data to read.
1248
gobject.IO_OUT: u"OUT", # Data can be written (without
1249
# blocking).
1250
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1251
gobject.IO_ERR: u"ERR", # Error condition.
1252
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1253
# broken, usually for pipes and
1254
# sockets).
1255
}
1256
conditions_string = ' | '.join(name
1257
for cond, name in
1258
condition_names.iteritems()
1259
if cond & condition)
1260
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1261
conditions_string)
1262
1263
# Turn the pipe file descriptor into a Python file object
1264
if source not in file_objects:
1265
file_objects[source] = os.fdopen(source, u"r", 1)
1266
1267
# Read a line from the file object
1268
cmdline = file_objects[source].readline()
1269
if not cmdline: # Empty line means end of file
1270
# close the IPC pipe
1271
file_objects[source].close()
1272
del file_objects[source]
1273
1274
# Stop calling this function
1275
return False
1276
1277
logger.debug(u"IPC command: %r", cmdline)
1278
1279
# Parse and act on command
1280
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1281
1282
if cmd == u"NOTFOUND":
1283
fpr, address = args.split(None, 1)
1284
logger.warning(u"Client not found for fingerprint: %s, ad"
1285
u"dress: %s", fpr, address)
1286
if self.use_dbus:
1287
# Emit D-Bus signal
1288
mandos_dbus_service.ClientNotFound(fpr, address)
1289
elif cmd == u"INVALID":
1290
for client in self.clients:
1291
if client.name == args:
1292
logger.warning(u"Client %s is invalid", args)
1293
if self.use_dbus:
1294
# Emit D-Bus signal
1295
client.Rejected()
1296
break
1297
else:
1298
logger.error(u"Unknown client %s is invalid", args)
1299
elif cmd == u"SENDING":
1300
for client in self.clients:
1301
if client.name == args:
1302
logger.info(u"Sending secret to %s", client.name)
1303
client.checked_ok()
1304
if self.use_dbus:
1305
# Emit D-Bus signal
1306
client.GotSecret()
1307
break
1308
else:
1309
logger.error(u"Sending secret to unknown client %s",
1310
args)
1311
else:
1312
logger.error(u"Unknown IPC command: %r", cmdline)
1313
1314
# Keep calling this function
1315
return True
789
1316
790
1317
791
1318
def string_to_delta(interval):
792
1319
"""Parse a string and return a datetime.timedelta
793
794
>>> string_to_delta('7d')
1320
1321
>>> string_to_delta(u'7d')
795
1322
datetime.timedelta(7)
796
>>> string_to_delta('60s')
1323
>>> string_to_delta(u'60s')
797
1324
datetime.timedelta(0, 60)
798
>>> string_to_delta('60m')
1325
>>> string_to_delta(u'60m')
799
1326
datetime.timedelta(0, 3600)
800
>>> string_to_delta('24h')
1327
>>> string_to_delta(u'24h')
801
1328
datetime.timedelta(1)
802
1329
>>> string_to_delta(u'1w')
803
1330
datetime.timedelta(7)
804
>>> string_to_delta('5m 30s')
1331
>>> string_to_delta(u'5m 30s')
805
1332
datetime.timedelta(0, 330)
806
1333
"""
807
1334
timevalue = datetime.timedelta(0)
820
1347
elif suffix == u"w":
821
1348
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
822
1349
else:
823
raise ValueError
824
except (ValueError, IndexError):
825
raise ValueError
1350
raise ValueError(u"Unknown suffix %r" % suffix)
1351
except (ValueError, IndexError), e:
1352
raise ValueError(e.message)
826
1353
timevalue += delta
827
1354
return timevalue
828
1355
829
1356
830
def server_state_changed(state):
831
"""Derived from the Avahi example code"""
832
if state == avahi.SERVER_COLLISION:
833
logger.error(u"Zeroconf server name collision")
834
service.remove()
835
elif state == avahi.SERVER_RUNNING:
836
service.add()
837
838
839
def entry_group_state_changed(state, error):
840
"""Derived from the Avahi example code"""
841
logger.debug(u"Avahi state change: %i", state)
842
843
if state == avahi.ENTRY_GROUP_ESTABLISHED:
844
logger.debug(u"Zeroconf service established.")
845
elif state == avahi.ENTRY_GROUP_COLLISION:
846
logger.warning(u"Zeroconf service name collision.")
847
service.rename()
848
elif state == avahi.ENTRY_GROUP_FAILURE:
849
logger.critical(u"Avahi: Error in group state changed %s",
850
unicode(error))
851
raise AvahiGroupError(u"State changed: %s" % unicode(error))
852
853
1357
def if_nametoindex(interface):
854
"""Call the C function if_nametoindex(), or equivalent"""
1358
"""Call the C function if_nametoindex(), or equivalent
1359
1360
Note: This function cannot accept a unicode string."""
855
1361
global if_nametoindex
856
1362
try:
857
1363
if_nametoindex = (ctypes.cdll.LoadLibrary
858
(ctypes.util.find_library("c"))
1364
(ctypes.util.find_library(u"c"))
859
1365
.if_nametoindex)
860
1366
except (OSError, AttributeError):
861
if "struct" not in sys.modules:
862
import struct
863
if "fcntl" not in sys.modules:
864
import fcntl
1367
logger.warning(u"Doing if_nametoindex the hard way")
865
1368
def if_nametoindex(interface):
866
1369
"Get an interface index the hard way, i.e. using fcntl()"
867
1370
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
868
1371
with closing(socket.socket()) as s:
869
1372
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
870
struct.pack("16s16x", interface))
871
interface_index = struct.unpack("I", ifreq[16:20])[0]
1373
struct.pack(str(u"16s16x"),
1374
interface))
1375
interface_index = struct.unpack(str(u"I"),
1376
ifreq[16:20])[0]
872
1377
return interface_index
873
1378
return if_nametoindex(interface)
874
1379
875
1380
876
1381
def daemon(nochdir = False, noclose = False):
877
1382
"""See daemon(3). Standard BSD Unix function.
1383
878
1384
This should really exist as os.daemon, but it doesn't (yet)."""
879
1385
if os.fork():
880
1386
sys.exit()
881
1387
os.setsid()
882
1388
if not nochdir:
883
os.chdir("/")
1389
os.chdir(u"/")
884
1390
if os.fork():
885
1391
sys.exit()
886
1392
if not noclose:
888
1394
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
889
1395
if not stat.S_ISCHR(os.fstat(null).st_mode):
890
1396
raise OSError(errno.ENODEV,
891
"/dev/null not a character device")
1397
u"%s not a character device"
1398
% os.path.devnull)
892
1399
os.dup2(null, sys.stdin.fileno())
893
1400
os.dup2(null, sys.stdout.fileno())
894
1401
os.dup2(null, sys.stderr.fileno())
897
1404
898
1405
899
1406
def main():
1407
1408
##################################################################
1409
# Parsing of options, both command line and config file
1410
900
1411
parser = optparse.OptionParser(version = "%%prog %s" % version)
901
parser.add_option("-i", "--interface", type="string",
902
metavar="IF", help="Bind to interface IF")
903
parser.add_option("-a", "--address", type="string",
904
help="Address to listen for requests on")
905
parser.add_option("-p", "--port", type="int",
906
help="Port number to receive requests on")
907
parser.add_option("--check", action="store_true",
908
help="Run self-test")
909
parser.add_option("--debug", action="store_true",
910
help="Debug mode; run in foreground and log to"
911
" terminal")
912
parser.add_option("--priority", type="string", help="GnuTLS"
913
" priority string (see GnuTLS documentation)")
914
parser.add_option("--servicename", type="string", metavar="NAME",
915
help="Zeroconf service name")
916
parser.add_option("--configdir", type="string",
917
default="/etc/mandos", metavar="DIR",
918
help="Directory to search for configuration"
919
" files")
920
parser.add_option("--no-dbus", action="store_false",
921
dest="use_dbus",
922
help="Do not provide D-Bus system bus"
923
" interface")
1412
parser.add_option("-i", u"--interface", type=u"string",
1413
metavar="IF", help=u"Bind to interface IF")
1414
parser.add_option("-a", u"--address", type=u"string",
1415
help=u"Address to listen for requests on")
1416
parser.add_option("-p", u"--port", type=u"int",
1417
help=u"Port number to receive requests on")
1418
parser.add_option("--check", action=u"store_true",
1419
help=u"Run self-test")
1420
parser.add_option("--debug", action=u"store_true",
1421
help=u"Debug mode; run in foreground and log to"
1422
u" terminal")
1423
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1424
u" priority string (see GnuTLS documentation)")
1425
parser.add_option("--servicename", type=u"string",
1426
metavar=u"NAME", help=u"Zeroconf service name")
1427
parser.add_option("--configdir", type=u"string",
1428
default=u"/etc/mandos", metavar=u"DIR",
1429
help=u"Directory to search for configuration"
1430
u" files")
1431
parser.add_option("--no-dbus", action=u"store_false",
1432
dest=u"use_dbus", help=u"Do not provide D-Bus"
1433
u" system bus interface")
1434
parser.add_option("--no-ipv6", action=u"store_false",
1435
dest=u"use_ipv6", help=u"Do not use IPv6")
924
1436
options = parser.parse_args()[0]
925
1437
926
1438
if options.check:
929
1441
sys.exit()
930
1442
931
1443
# Default values for config file for server-global settings
932
server_defaults = { "interface": "",
933
"address": "",
934
"port": "",
935
"debug": "False",
936
"priority":
937
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
938
"servicename": "Mandos",
939
"use_dbus": "True",
1444
server_defaults = { u"interface": u"",
1445
u"address": u"",
1446
u"port": u"",
1447
u"debug": u"False",
1448
u"priority":
1449
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1450
u"servicename": u"Mandos",
1451
u"use_dbus": u"True",
1452
u"use_ipv6": u"True",
940
1453
}
941
1454
942
1455
# Parse config file for server-global settings
943
server_config = ConfigParser.SafeConfigParser(server_defaults)
1456
server_config = configparser.SafeConfigParser(server_defaults)
944
1457
del server_defaults
945
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1458
server_config.read(os.path.join(options.configdir,
1459
u"mandos.conf"))
946
1460
# Convert the SafeConfigParser object to a dict
947
1461
server_settings = server_config.defaults()
948
1462
# Use the appropriate methods on the non-string config options
949
server_settings["debug"] = server_config.getboolean("DEFAULT",
950
"debug")
951
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
952
"use_dbus")
1463
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1464
server_settings[option] = server_config.getboolean(u"DEFAULT",
1465
option)
953
1466
if server_settings["port"]:
954
server_settings["port"] = server_config.getint("DEFAULT",
955
"port")
1467
server_settings["port"] = server_config.getint(u"DEFAULT",
1468
u"port")
956
1469
del server_config
957
1470
958
1471
# Override the settings from the config file with command line
959
1472
# options, if set.
960
for option in ("interface", "address", "port", "debug",
961
"priority", "servicename", "configdir",
962
"use_dbus"):
1473
for option in (u"interface", u"address", u"port", u"debug",
1474
u"priority", u"servicename", u"configdir",
1475
u"use_dbus", u"use_ipv6"):
963
1476
value = getattr(options, option)
964
1477
if value is not None:
965
1478
server_settings[option] = value
966
1479
del options
1480
# Force all strings to be unicode
1481
for option in server_settings.keys():
1482
if type(server_settings[option]) is str:
1483
server_settings[option] = unicode(server_settings[option])
967
1484
# Now we have our good server settings in "server_settings"
968
1485
1486
##################################################################
1487
969
1488
# For convenience
970
debug = server_settings["debug"]
971
use_dbus = server_settings["use_dbus"]
1489
debug = server_settings[u"debug"]
1490
use_dbus = server_settings[u"use_dbus"]
1491
use_ipv6 = server_settings[u"use_ipv6"]
972
1492
973
1493
if not debug:
974
1494
syslogger.setLevel(logging.WARNING)
975
1495
console.setLevel(logging.WARNING)
976
1496
977
if server_settings["servicename"] != "Mandos":
1497
if server_settings[u"servicename"] != u"Mandos":
978
1498
syslogger.setFormatter(logging.Formatter
979
('Mandos (%s): %%(levelname)s:'
980
' %%(message)s'
981
% server_settings["servicename"]))
1499
(u'Mandos (%s) [%%(process)d]:'
1500
u' %%(levelname)s: %%(message)s'
1501
% server_settings[u"servicename"]))
982
1502
983
1503
# Parse config file with clients
984
client_defaults = { "timeout": "1h",
985
"interval": "5m",
986
"checker": "fping -q -- %%(host)s",
987
"host": "",
1504
client_defaults = { u"timeout": u"1h",
1505
u"interval": u"5m",
1506
u"checker": u"fping -q -- %%(host)s",
1507
u"host": u"",
988
1508
}
989
client_config = ConfigParser.SafeConfigParser(client_defaults)
990
client_config.read(os.path.join(server_settings["configdir"],
991
"clients.conf"))
992
993
clients = Set()
994
tcp_server = IPv6_TCPServer((server_settings["address"],
995
server_settings["port"]),
996
TCP_handler,
997
settings=server_settings,
998
clients=clients)
999
pidfilename = "/var/run/mandos.pid"
1000
try:
1001
pidfile = open(pidfilename, "w")
1002
except IOError, error:
1003
logger.error("Could not open file %r", pidfilename)
1004
1005
try:
1006
uid = pwd.getpwnam("_mandos").pw_uid
1007
gid = pwd.getpwnam("_mandos").pw_gid
1509
client_config = configparser.SafeConfigParser(client_defaults)
1510
client_config.read(os.path.join(server_settings[u"configdir"],
1511
u"clients.conf"))
1512
1513
global mandos_dbus_service
1514
mandos_dbus_service = None
1515
1516
tcp_server = MandosServer((server_settings[u"address"],
1517
server_settings[u"port"]),
1518
ClientHandler,
1519
interface=server_settings[u"interface"],
1520
use_ipv6=use_ipv6,
1521
gnutls_priority=
1522
server_settings[u"priority"],
1523
use_dbus=use_dbus)
1524
pidfilename = u"/var/run/mandos.pid"
1525
try:
1526
pidfile = open(pidfilename, u"w")
1527
except IOError:
1528
logger.error(u"Could not open file %r", pidfilename)
1529
1530
try:
1531
uid = pwd.getpwnam(u"_mandos").pw_uid
1532
gid = pwd.getpwnam(u"_mandos").pw_gid
1008
1533
except KeyError:
1009
1534
try:
1010
uid = pwd.getpwnam("mandos").pw_uid
1011
gid = pwd.getpwnam("mandos").pw_gid
1535
uid = pwd.getpwnam(u"mandos").pw_uid
1536
gid = pwd.getpwnam(u"mandos").pw_gid
1012
1537
except KeyError:
1013
1538
try:
1014
uid = pwd.getpwnam("nobody").pw_uid
1015
gid = pwd.getpwnam("nogroup").pw_gid
1539
uid = pwd.getpwnam(u"nobody").pw_uid
1540
gid = pwd.getpwnam(u"nobody").pw_gid
1016
1541
except KeyError:
1017
1542
uid = 65534
1018
1543
gid = 65534
1019
1544
try:
1545
os.setgid(gid)
1020
1546
os.setuid(uid)
1021
os.setgid(gid)
1022
1547
except OSError, error:
1023
1548
if error[0] != errno.EPERM:
1024
1549
raise error
1025
1550
1026
global service
1027
service = AvahiService(name = server_settings["servicename"],
1028
servicetype = "_mandos._tcp", )
1029
if server_settings["interface"]:
1030
service.interface = (if_nametoindex
1031
(server_settings["interface"]))
1551
# Enable all possible GnuTLS debugging
1552
if debug:
1553
# "Use a log level over 10 to enable all debugging options."
1554
# - GnuTLS manual
1555
gnutls.library.functions.gnutls_global_set_log_level(11)
1556
1557
@gnutls.library.types.gnutls_log_func
1558
def debug_gnutls(level, string):
1559
logger.debug(u"GnuTLS: %s", string[:-1])
1560
1561
(gnutls.library.functions
1562
.gnutls_global_set_log_function(debug_gnutls))
1032
1563
1033
1564
global main_loop
1034
global bus
1035
global server
1036
1565
# From the Avahi example code
1037
1566
DBusGMainLoop(set_as_default=True )
1038
1567
main_loop = gobject.MainLoop()
1039
1568
bus = dbus.SystemBus()
1040
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1041
avahi.DBUS_PATH_SERVER),
1042
avahi.DBUS_INTERFACE_SERVER)
1043
1569
# End of Avahi example code
1044
1570
if use_dbus:
1045
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1571
try:
1572
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1573
bus, do_not_queue=True)
1574
except dbus.exceptions.NameExistsException, e:
1575
logger.error(unicode(e) + u", disabling D-Bus")
1576
use_dbus = False
1577
server_settings[u"use_dbus"] = False
1578
tcp_server.use_dbus = False
1579
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1580
service = AvahiService(name = server_settings[u"servicename"],
1581
servicetype = u"_mandos._tcp",
1582
protocol = protocol, bus = bus)
1583
if server_settings["interface"]:
1584
service.interface = (if_nametoindex
1585
(str(server_settings[u"interface"])))
1046
1586
1047
clients.update(Set(Client(name = section,
1048
config
1049
= dict(client_config.items(section)),
1050
use_dbus = use_dbus)
1051
for section in client_config.sections()))
1052
if not clients:
1587
client_class = Client
1588
if use_dbus:
1589
client_class = functools.partial(ClientDBus, bus = bus)
1590
tcp_server.clients.update(set(
1591
client_class(name = section,
1592
config= dict(client_config.items(section)))
1593
for section in client_config.sections()))
1594
if not tcp_server.clients:
1053
1595
logger.warning(u"No clients defined")
1054
1596
1055
1597
if debug:
1065
1607
daemon()
1066
1608
1067
1609
try:
1068
pid = os.getpid()
1069
pidfile.write(str(pid) + "\n")
1070
pidfile.close()
1610
with closing(pidfile):
1611
pid = os.getpid()
1612
pidfile.write(str(pid) + "\n")
1071
1613
del pidfile
1072
1614
except IOError:
1073
1615
logger.error(u"Could not write to file %r with PID %d",
1077
1619
pass
1078
1620
del pidfilename
1079
1621
1080
def cleanup():
1081
"Cleanup function; run on exit"
1082
global group
1083
# From the Avahi example code
1084
if not group is None:
1085
group.Free()
1086
group = None
1087
# End of Avahi example code
1088
1089
while clients:
1090
client = clients.pop()
1091
client.disable_hook = None
1092
client.disable()
1093
1094
atexit.register(cleanup)
1095
1096
1622
if not debug:
1097
1623
signal.signal(signal.SIGINT, signal.SIG_IGN)
1098
1624
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1099
1625
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1100
1626
1101
1627
if use_dbus:
1102
class MandosServer(dbus.service.Object):
1628
class MandosDBusService(dbus.service.Object):
1103
1629
"""A D-Bus proxy object"""
1104
1630
def __init__(self):
1105
dbus.service.Object.__init__(self, bus, "/")
1631
dbus.service.Object.__init__(self, bus, u"/")
1106
1632
_interface = u"se.bsnet.fukt.Mandos"
1107
1633
1108
@dbus.service.signal(_interface, signature="oa{sv}")
1634
@dbus.service.signal(_interface, signature=u"oa{sv}")
1109
1635
def ClientAdded(self, objpath, properties):
1110
1636
"D-Bus signal"
1111
1637
pass
1112
1638
1113
@dbus.service.signal(_interface, signature="os")
1639
@dbus.service.signal(_interface, signature=u"ss")
1640
def ClientNotFound(self, fingerprint, address):
1641
"D-Bus signal"
1642
pass
1643
1644
@dbus.service.signal(_interface, signature=u"os")
1114
1645
def ClientRemoved(self, objpath, name):
1115
1646
"D-Bus signal"
1116
1647
pass
1117
1648
1118
@dbus.service.method(_interface, out_signature="ao")
1649
@dbus.service.method(_interface, out_signature=u"ao")
1119
1650
def GetAllClients(self):
1120
1651
"D-Bus method"
1121
return dbus.Array(c.dbus_object_path for c in clients)
1652
return dbus.Array(c.dbus_object_path
1653
for c in tcp_server.clients)
1122
1654
1123
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1655
@dbus.service.method(_interface,
1656
out_signature=u"a{oa{sv}}")
1124
1657
def GetAllClientsWithProperties(self):
1125
1658
"D-Bus method"
1126
1659
return dbus.Dictionary(
1127
((c.dbus_object_path, c.GetAllProperties())
1128
for c in clients),
1129
signature="oa{sv}")
1660
((c.dbus_object_path, c.GetAll(u""))
1661
for c in tcp_server.clients),
1662
signature=u"oa{sv}")
1130
1663
1131
@dbus.service.method(_interface, in_signature="o")
1664
@dbus.service.method(_interface, in_signature=u"o")
1132
1665
def RemoveClient(self, object_path):
1133
1666
"D-Bus method"
1134
for c in clients:
1667
for c in tcp_server.clients:
1135
1668
if c.dbus_object_path == object_path:
1136
clients.remove(c)
1669
tcp_server.clients.remove(c)
1670
c.remove_from_connection()
1137
1671
# Don't signal anything except ClientRemoved
1138
c.use_dbus = False
1139
c.disable()
1672
c.disable(quiet=True)
1140
1673
# Emit D-Bus signal
1141
1674
self.ClientRemoved(object_path, c.name)
1142
1675
return
1143
raise KeyError
1676
raise KeyError(object_path)
1144
1677
1145
1678
del _interface
1146
1679
1147
mandos_server = MandosServer()
1148
1149
for client in clients:
1680
mandos_dbus_service = MandosDBusService()
1681
1682
def cleanup():
1683
"Cleanup function; run on exit"
1684
service.cleanup()
1685
1686
while tcp_server.clients:
1687
client = tcp_server.clients.pop()
1688
if use_dbus:
1689
client.remove_from_connection()
1690
client.disable_hook = None
1691
# Don't signal anything except ClientRemoved
1692
client.disable(quiet=True)
1693
if use_dbus:
1694
# Emit D-Bus signal
1695
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1696
client.name)
1697
1698
atexit.register(cleanup)
1699
1700
for client in tcp_server.clients:
1150
1701
if use_dbus:
1151
1702
# Emit D-Bus signal
1152
mandos_server.ClientAdded(client.dbus_object_path,
1153
client.GetAllProperties())
1703
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1704
client.GetAll(u""))
1154
1705
client.enable()
1155
1706
1156
1707
tcp_server.enable()
1158
1709
1159
1710
# Find out what port we got
1160
1711
service.port = tcp_server.socket.getsockname()[1]
1161
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1162
u" scope_id %d" % tcp_server.socket.getsockname())
1712
if use_ipv6:
1713
logger.info(u"Now listening on address %r, port %d,"
1714
" flowinfo %d, scope_id %d"
1715
% tcp_server.socket.getsockname())
1716
else: # IPv4
1717
logger.info(u"Now listening on address %r, port %d"
1718
% tcp_server.socket.getsockname())
1163
1719
1164
1720
#service.interface = tcp_server.socket.getsockname()[3]
1165
1721
1166
1722
try:
1167
1723
# From the Avahi example code
1168
server.connect_to_signal("StateChanged", server_state_changed)
1169
1724
try:
1170
server_state_changed(server.GetState())
1725
service.activate()
1171
1726
except dbus.exceptions.DBusException, error:
1172
1727
logger.critical(u"DBusException: %s", error)
1728
cleanup()
1173
1729
sys.exit(1)
1174
1730
# End of Avahi example code
1175
1731
1182
1738
main_loop.run()
1183
1739
except AvahiError, error:
1184
1740
logger.critical(u"AvahiError: %s", error)
1741
cleanup()
1185
1742
sys.exit(1)
1186
1743
except KeyboardInterrupt:
1187
1744
if debug:
1188
print
1745
print >> sys.stderr
1746
logger.debug(u"Server received KeyboardInterrupt")
1747
logger.debug(u"Server exiting")
1748
# Must run before the D-Bus bus name gets deregistered
1749
cleanup()
1189
1750
1190
1751
if __name__ == '__main__':
1191
1752
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0