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- Committer: teddy at bsnet
- Date: 2010-08-23 19:23:15 UTC
- mto: (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 421.
- Revision ID: teddy@fukt.bsnet.se-20100823192315-pefgye0l6cavcejs
* debian/control (mandos/Depends): Added "python-urwid".
* mandos (Client.approved_by_default): Changed default to "True".
(Client.approved_delay): Changed default to "0s".
(ClientDBus.GotSecret, ClientDBus.Rejected,
ClientDBus.NeedApproval): Emit "PropertyChanged" signal for the
"approved_pending" property.
* mandos (Client.approved_by_default): Changed default to "True".
(Client.approved_delay): Changed default to "0s".
(ClientDBus.GotSecret, ClientDBus.Rejected,
ClientDBus.NeedApproval): Emit "PropertyChanged" signal for the
"approved_pending" property.
- 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 multiprocessing
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 = "1.0.5"
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 [%(process)d]: %(levelname)s:'
77
' %(message)s'))
91
(u'Mandos [%(process)d]: %(levelname)s:'
92
u' %(message)s'))
78
93
logger.addHandler(syslogger)
79
94
80
95
console = logging.StreamHandler()
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
96
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
97
u' %(levelname)s:'
98
u' %(message)s'))
83
99
logger.addHandler(console)
84
100
101
multiprocessing_manager = multiprocessing.Manager()
102
85
103
class AvahiError(Exception):
86
104
def __init__(self, value, *args, **kwargs):
87
105
self.value = value
98
116
99
117
class AvahiService(object):
100
118
"""An Avahi (Zeroconf) service.
119
101
120
Attributes:
102
121
interface: integer; avahi.IF_UNSPEC or an interface index.
103
122
Used to optionally bind to the specified interface.
104
name: string; Example: 'Mandos'
105
type: string; Example: '_mandos._tcp'.
123
name: string; Example: u'Mandos'
124
type: string; Example: u'_mandos._tcp'.
106
125
See <http://www.dns-sd.org/ServiceTypes.html>
107
126
port: integer; what port to announce
108
127
TXT: list of strings; TXT record for the service
111
130
max_renames: integer; maximum number of renames
112
131
rename_count: integer; counter so we only rename after collisions
113
132
a sensible number of times
133
group: D-Bus Entry Group
134
server: D-Bus Server
135
bus: dbus.SystemBus()
114
136
"""
115
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
138
servicetype = None, port = None, TXT = None,
117
domain = "", host = "", max_renames = 32768):
139
domain = u"", host = u"", max_renames = 32768,
140
protocol = avahi.PROTO_UNSPEC, bus = None):
118
141
self.interface = interface
119
142
self.name = name
120
143
self.type = servicetype
124
147
self.host = host
125
148
self.rename_count = 0
126
149
self.max_renames = max_renames
150
self.protocol = protocol
151
self.group = None # our entry group
152
self.server = None
153
self.bus = bus
127
154
def rename(self):
128
155
"""Derived from the Avahi example code"""
129
156
if self.rename_count >= self.max_renames:
131
158
u" after %i retries, exiting.",
132
159
self.rename_count)
133
160
raise AvahiServiceError(u"Too many renames")
134
self.name = server.GetAlternativeServiceName(self.name)
161
self.name = self.server.GetAlternativeServiceName(self.name)
135
162
logger.info(u"Changing Zeroconf service name to %r ...",
136
str(self.name))
163
unicode(self.name))
137
164
syslogger.setFormatter(logging.Formatter
138
('Mandos (%s): %%(levelname)s:'
139
' %%(message)s' % self.name))
165
(u'Mandos (%s) [%%(process)d]:'
166
u' %%(levelname)s: %%(message)s'
167
% self.name))
140
168
self.remove()
141
169
self.add()
142
170
self.rename_count += 1
143
171
def remove(self):
144
172
"""Derived from the Avahi example code"""
145
if group is not None:
146
group.Reset()
173
if self.group is not None:
174
self.group.Reset()
147
175
def add(self):
148
176
"""Derived from the Avahi example code"""
149
global group
150
if group is None:
151
group = dbus.Interface(bus.get_object
152
(avahi.DBUS_NAME,
153
server.EntryGroupNew()),
154
avahi.DBUS_INTERFACE_ENTRY_GROUP)
155
group.connect_to_signal('StateChanged',
156
entry_group_state_changed)
177
if self.group is None:
178
self.group = dbus.Interface(
179
self.bus.get_object(avahi.DBUS_NAME,
180
self.server.EntryGroupNew()),
181
avahi.DBUS_INTERFACE_ENTRY_GROUP)
182
self.group.connect_to_signal('StateChanged',
183
self
184
.entry_group_state_changed)
157
185
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
158
service.name, service.type)
159
group.AddService(
160
self.interface, # interface
161
avahi.PROTO_INET6, # protocol
162
dbus.UInt32(0), # flags
163
self.name, self.type,
164
self.domain, self.host,
165
dbus.UInt16(self.port),
166
avahi.string_array_to_txt_array(self.TXT))
167
group.Commit()
168
169
# From the Avahi example code:
170
group = None # our entry group
171
# End of Avahi example code
172
173
174
def _datetime_to_dbus(dt, variant_level=0):
175
"""Convert a UTC datetime.datetime() to a D-Bus type."""
176
return dbus.String(dt.isoformat(), variant_level=variant_level)
177
178
179
class Client(dbus.service.Object):
186
self.name, self.type)
187
self.group.AddService(
188
self.interface,
189
self.protocol,
190
dbus.UInt32(0), # flags
191
self.name, self.type,
192
self.domain, self.host,
193
dbus.UInt16(self.port),
194
avahi.string_array_to_txt_array(self.TXT))
195
self.group.Commit()
196
def entry_group_state_changed(self, state, error):
197
"""Derived from the Avahi example code"""
198
logger.debug(u"Avahi state change: %i", state)
199
200
if state == avahi.ENTRY_GROUP_ESTABLISHED:
201
logger.debug(u"Zeroconf service established.")
202
elif state == avahi.ENTRY_GROUP_COLLISION:
203
logger.warning(u"Zeroconf service name collision.")
204
self.rename()
205
elif state == avahi.ENTRY_GROUP_FAILURE:
206
logger.critical(u"Avahi: Error in group state changed %s",
207
unicode(error))
208
raise AvahiGroupError(u"State changed: %s"
209
% unicode(error))
210
def cleanup(self):
211
"""Derived from the Avahi example code"""
212
if self.group is not None:
213
self.group.Free()
214
self.group = None
215
def server_state_changed(self, state):
216
"""Derived from the Avahi example code"""
217
if state == avahi.SERVER_COLLISION:
218
logger.error(u"Zeroconf server name collision")
219
self.remove()
220
elif state == avahi.SERVER_RUNNING:
221
self.add()
222
def activate(self):
223
"""Derived from the Avahi example code"""
224
if self.server is None:
225
self.server = dbus.Interface(
226
self.bus.get_object(avahi.DBUS_NAME,
227
avahi.DBUS_PATH_SERVER),
228
avahi.DBUS_INTERFACE_SERVER)
229
self.server.connect_to_signal(u"StateChanged",
230
self.server_state_changed)
231
self.server_state_changed(self.server.GetState())
232
233
234
class Client(object):
180
235
"""A representation of a client host served by this server.
236
181
237
Attributes:
182
238
name: string; from the config file, used in log messages and
183
239
D-Bus identifiers
190
246
enabled: bool()
191
247
last_checked_ok: datetime.datetime(); (UTC) or None
192
248
timeout: datetime.timedelta(); How long from last_checked_ok
193
until this client is invalid
249
until this client is disabled
194
250
interval: datetime.timedelta(); How often to start a new checker
195
251
disable_hook: If set, called by disable() as disable_hook(self)
196
252
checker: subprocess.Popen(); a running checker process used
197
253
to see if the client lives.
198
254
'None' if no process is running.
199
255
checker_initiator_tag: a gobject event source tag, or None
200
disable_initiator_tag: - '' -
256
disable_initiator_tag: - '' -
201
257
checker_callback_tag: - '' -
202
258
checker_command: string; External command which is run to check if
203
259
client lives. %() expansions are done at
204
260
runtime with vars(self) as dict, so that for
205
261
instance %(name)s can be used in the command.
206
use_dbus: bool(); Whether to provide D-Bus interface and signals
207
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
262
current_checker_command: string; current running checker_command
263
approved_delay: datetime.timedelta(); Time to wait for approval
264
_approved: bool(); 'None' if not yet approved/disapproved
265
approved_duration: datetime.timedelta(); Duration of one approval
208
266
"""
267
268
@staticmethod
269
def _timedelta_to_milliseconds(td):
270
"Convert a datetime.timedelta() to milliseconds"
271
return ((td.days * 24 * 60 * 60 * 1000)
272
+ (td.seconds * 1000)
273
+ (td.microseconds // 1000))
274
209
275
def timeout_milliseconds(self):
210
276
"Return the 'timeout' attribute in milliseconds"
211
return ((self.timeout.days * 24 * 60 * 60 * 1000)
212
+ (self.timeout.seconds * 1000)
213
+ (self.timeout.microseconds // 1000))
277
return self._timedelta_to_milliseconds(self.timeout)
214
278
215
279
def interval_milliseconds(self):
216
280
"Return the 'interval' attribute in milliseconds"
217
return ((self.interval.days * 24 * 60 * 60 * 1000)
218
+ (self.interval.seconds * 1000)
219
+ (self.interval.microseconds // 1000))
281
return self._timedelta_to_milliseconds(self.interval)
282
283
def approved_delay_milliseconds(self):
284
return self._timedelta_to_milliseconds(self.approved_delay)
220
285
221
def __init__(self, name = None, disable_hook=None, config=None,
222
use_dbus=True):
286
def __init__(self, name = None, disable_hook=None, config=None):
223
287
"""Note: the 'checker' key in 'config' sets the
224
288
'checker_command' attribute and *not* the 'checker'
225
289
attribute."""
227
291
if config is None:
228
292
config = {}
229
293
logger.debug(u"Creating client %r", self.name)
230
self.use_dbus = False # During __init__
231
294
# Uppercase and remove spaces from fingerprint for later
232
295
# comparison purposes with return value from the fingerprint()
233
296
# function
234
self.fingerprint = (config["fingerprint"].upper()
297
self.fingerprint = (config[u"fingerprint"].upper()
235
298
.replace(u" ", u""))
236
299
logger.debug(u" Fingerprint: %s", self.fingerprint)
237
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
239
elif "secfile" in config:
240
with closing(open(os.path.expanduser
241
(os.path.expandvars
242
(config["secfile"])))) as secfile:
300
if u"secret" in config:
301
self.secret = config[u"secret"].decode(u"base64")
302
elif u"secfile" in config:
303
with open(os.path.expanduser(os.path.expandvars
304
(config[u"secfile"])),
305
"rb") as secfile:
243
306
self.secret = secfile.read()
244
307
else:
308
#XXX Need to allow secret on demand!
245
309
raise TypeError(u"No secret or secfile for client %s"
246
310
% self.name)
247
self.host = config.get("host", "")
311
self.host = config.get(u"host", u"")
248
312
self.created = datetime.datetime.utcnow()
249
313
self.enabled = False
250
314
self.last_enabled = None
251
315
self.last_checked_ok = None
252
self.timeout = string_to_delta(config["timeout"])
253
self.interval = string_to_delta(config["interval"])
316
self.timeout = string_to_delta(config[u"timeout"])
317
self.interval = string_to_delta(config[u"interval"])
254
318
self.disable_hook = disable_hook
255
319
self.checker = None
256
320
self.checker_initiator_tag = None
257
321
self.disable_initiator_tag = None
258
322
self.checker_callback_tag = None
259
self.checker_command = config["checker"]
323
self.checker_command = config[u"checker"]
324
self.current_checker_command = None
260
325
self.last_connect = None
261
# Only now, when this client is initialized, can it show up on
262
# the D-Bus
263
self.use_dbus = use_dbus
264
if self.use_dbus:
265
self.dbus_object_path = (dbus.ObjectPath
266
("/clients/"
267
+ self.name.replace(".", "_")))
268
dbus.service.Object.__init__(self, bus,
269
self.dbus_object_path)
270
326
self.approvals_pending = 0
327
self._approved = None
328
self.approved_by_default = config.get(u"approved_by_default",
329
True)
330
self.approved_delay = string_to_delta(
331
config[u"approved_delay"])
332
self.approved_duration = string_to_delta(
333
config[u"approved_duration"])
334
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
335
336
def send_changedstate(self):
337
self.changedstate.acquire()
338
self.changedstate.notify_all()
339
self.changedstate.release()
340
271
341
def enable(self):
272
342
"""Start this client's checker and timeout hooks"""
343
if getattr(self, u"enabled", False):
344
# Already enabled
345
return
346
self.send_changedstate()
273
347
self.last_enabled = datetime.datetime.utcnow()
274
348
# Schedule a new checker to be started an 'interval' from now,
275
349
# and every interval from then on.
276
350
self.checker_initiator_tag = (gobject.timeout_add
277
351
(self.interval_milliseconds(),
278
352
self.start_checker))
279
# Also start a new checker *right now*.
280
self.start_checker()
281
353
# Schedule a disable() when 'timeout' has passed
282
354
self.disable_initiator_tag = (gobject.timeout_add
283
355
(self.timeout_milliseconds(),
284
356
self.disable))
285
357
self.enabled = True
286
if self.use_dbus:
287
# Emit D-Bus signals
288
self.PropertyChanged(dbus.String(u"enabled"),
289
dbus.Boolean(True, variant_level=1))
290
self.PropertyChanged(dbus.String(u"last_enabled"),
291
(_datetime_to_dbus(self.last_enabled,
292
variant_level=1)))
358
# Also start a new checker *right now*.
359
self.start_checker()
293
360
294
def disable(self):
361
def disable(self, quiet=True):
295
362
"""Disable this client."""
296
363
if not getattr(self, "enabled", False):
297
364
return False
298
logger.info(u"Disabling client %s", self.name)
299
if getattr(self, "disable_initiator_tag", False):
365
if not quiet:
366
self.send_changedstate()
367
if not quiet:
368
logger.info(u"Disabling client %s", self.name)
369
if getattr(self, u"disable_initiator_tag", False):
300
370
gobject.source_remove(self.disable_initiator_tag)
301
371
self.disable_initiator_tag = None
302
if getattr(self, "checker_initiator_tag", False):
372
if getattr(self, u"checker_initiator_tag", False):
303
373
gobject.source_remove(self.checker_initiator_tag)
304
374
self.checker_initiator_tag = None
305
375
self.stop_checker()
306
376
if self.disable_hook:
307
377
self.disable_hook(self)
308
378
self.enabled = False
309
if self.use_dbus:
310
# Emit D-Bus signal
311
self.PropertyChanged(dbus.String(u"enabled"),
312
dbus.Boolean(False, variant_level=1))
313
379
# Do not run this again if called by a gobject.timeout_add
314
380
return False
315
381
321
387
"""The checker has completed, so take appropriate actions."""
322
388
self.checker_callback_tag = None
323
389
self.checker = None
324
if self.use_dbus:
325
# Emit D-Bus signal
326
self.PropertyChanged(dbus.String(u"checker_running"),
327
dbus.Boolean(False, variant_level=1))
328
390
if os.WIFEXITED(condition):
329
391
exitstatus = os.WEXITSTATUS(condition)
330
392
if exitstatus == 0:
334
396
else:
335
397
logger.info(u"Checker for %(name)s failed",
336
398
vars(self))
337
if self.use_dbus:
338
# Emit D-Bus signal
339
self.CheckerCompleted(dbus.Int16(exitstatus),
340
dbus.Int64(condition),
341
dbus.String(command))
342
399
else:
343
400
logger.warning(u"Checker for %(name)s crashed?",
344
401
vars(self))
345
if self.use_dbus:
346
# Emit D-Bus signal
347
self.CheckerCompleted(dbus.Int16(-1),
348
dbus.Int64(condition),
349
dbus.String(command))
350
402
351
403
def checked_ok(self):
352
404
"""Bump up the timeout for this client.
405
353
406
This should only be called when the client has been seen,
354
407
alive and well.
355
408
"""
358
411
self.disable_initiator_tag = (gobject.timeout_add
359
412
(self.timeout_milliseconds(),
360
413
self.disable))
361
if self.use_dbus:
362
# Emit D-Bus signal
363
self.PropertyChanged(
364
dbus.String(u"last_checked_ok"),
365
(_datetime_to_dbus(self.last_checked_ok,
366
variant_level=1)))
367
414
368
415
def start_checker(self):
369
416
"""Start a new checker subprocess if one is not running.
417
370
418
If a checker already exists, leave it running and do
371
419
nothing."""
372
420
# The reason for not killing a running checker is that if we
375
423
# client would inevitably timeout, since no checker would get
376
424
# a chance to run to completion. If we instead leave running
377
425
# checkers alone, the checker would have to take more time
378
# than 'timeout' for the client to be declared invalid, which
379
# is as it should be.
426
# than 'timeout' for the client to be disabled, which is as it
427
# should be.
428
429
# If a checker exists, make sure it is not a zombie
430
try:
431
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
432
except (AttributeError, OSError), error:
433
if (isinstance(error, OSError)
434
and error.errno != errno.ECHILD):
435
raise error
436
else:
437
if pid:
438
logger.warning(u"Checker was a zombie")
439
gobject.source_remove(self.checker_callback_tag)
440
self.checker_callback(pid, status,
441
self.current_checker_command)
442
# Start a new checker if needed
380
443
if self.checker is None:
381
444
try:
382
445
# In case checker_command has exactly one % operator
383
446
command = self.checker_command % self.host
384
447
except TypeError:
385
448
# Escape attributes for the shell
386
escaped_attrs = dict((key, re.escape(str(val)))
449
escaped_attrs = dict((key,
450
re.escape(unicode(str(val),
451
errors=
452
u'replace')))
387
453
for key, val in
388
454
vars(self).iteritems())
389
455
try:
392
458
logger.error(u'Could not format string "%s":'
393
459
u' %s', self.checker_command, error)
394
460
return True # Try again later
461
self.current_checker_command = command
395
462
try:
396
463
logger.info(u"Starting checker %r for %s",
397
464
command, self.name)
401
468
# always replaced by /dev/null.)
402
469
self.checker = subprocess.Popen(command,
403
470
close_fds=True,
404
shell=True, cwd="/")
405
if self.use_dbus:
406
# Emit D-Bus signal
407
self.CheckerStarted(command)
408
self.PropertyChanged(
409
dbus.String("checker_running"),
410
dbus.Boolean(True, variant_level=1))
471
shell=True, cwd=u"/")
411
472
self.checker_callback_tag = (gobject.child_watch_add
412
473
(self.checker.pid,
413
474
self.checker_callback,
429
490
if self.checker_callback_tag:
430
491
gobject.source_remove(self.checker_callback_tag)
431
492
self.checker_callback_tag = None
432
if getattr(self, "checker", None) is None:
493
if getattr(self, u"checker", None) is None:
433
494
return
434
495
logger.debug(u"Stopping checker for %(name)s", vars(self))
435
496
try:
436
497
os.kill(self.checker.pid, signal.SIGTERM)
437
#os.sleep(0.5)
498
#time.sleep(0.5)
438
499
#if self.checker.poll() is None:
439
500
# os.kill(self.checker.pid, signal.SIGKILL)
440
501
except OSError, error:
441
502
if error.errno != errno.ESRCH: # No such process
442
503
raise
443
504
self.checker = None
444
if self.use_dbus:
505
506
def dbus_service_property(dbus_interface, signature=u"v",
507
access=u"readwrite", byte_arrays=False):
508
"""Decorators for marking methods of a DBusObjectWithProperties to
509
become properties on the D-Bus.
510
511
The decorated method will be called with no arguments by "Get"
512
and with one argument by "Set".
513
514
The parameters, where they are supported, are the same as
515
dbus.service.method, except there is only "signature", since the
516
type from Get() and the type sent to Set() is the same.
517
"""
518
# Encoding deeply encoded byte arrays is not supported yet by the
519
# "Set" method, so we fail early here:
520
if byte_arrays and signature != u"ay":
521
raise ValueError(u"Byte arrays not supported for non-'ay'"
522
u" signature %r" % signature)
523
def decorator(func):
524
func._dbus_is_property = True
525
func._dbus_interface = dbus_interface
526
func._dbus_signature = signature
527
func._dbus_access = access
528
func._dbus_name = func.__name__
529
if func._dbus_name.endswith(u"_dbus_property"):
530
func._dbus_name = func._dbus_name[:-14]
531
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
532
return func
533
return decorator
534
535
536
class DBusPropertyException(dbus.exceptions.DBusException):
537
"""A base class for D-Bus property-related exceptions
538
"""
539
def __unicode__(self):
540
return unicode(str(self))
541
542
543
class DBusPropertyAccessException(DBusPropertyException):
544
"""A property's access permissions disallows an operation.
545
"""
546
pass
547
548
549
class DBusPropertyNotFound(DBusPropertyException):
550
"""An attempt was made to access a non-existing property.
551
"""
552
pass
553
554
555
class DBusObjectWithProperties(dbus.service.Object):
556
"""A D-Bus object with properties.
557
558
Classes inheriting from this can use the dbus_service_property
559
decorator to expose methods as D-Bus properties. It exposes the
560
standard Get(), Set(), and GetAll() methods on the D-Bus.
561
"""
562
563
@staticmethod
564
def _is_dbus_property(obj):
565
return getattr(obj, u"_dbus_is_property", False)
566
567
def _get_all_dbus_properties(self):
568
"""Returns a generator of (name, attribute) pairs
569
"""
570
return ((prop._dbus_name, prop)
571
for name, prop in
572
inspect.getmembers(self, self._is_dbus_property))
573
574
def _get_dbus_property(self, interface_name, property_name):
575
"""Returns a bound method if one exists which is a D-Bus
576
property with the specified name and interface.
577
"""
578
for name in (property_name,
579
property_name + u"_dbus_property"):
580
prop = getattr(self, name, None)
581
if (prop is None
582
or not self._is_dbus_property(prop)
583
or prop._dbus_name != property_name
584
or (interface_name and prop._dbus_interface
585
and interface_name != prop._dbus_interface)):
586
continue
587
return prop
588
# No such property
589
raise DBusPropertyNotFound(self.dbus_object_path + u":"
590
+ interface_name + u"."
591
+ property_name)
592
593
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
594
out_signature=u"v")
595
def Get(self, interface_name, property_name):
596
"""Standard D-Bus property Get() method, see D-Bus standard.
597
"""
598
prop = self._get_dbus_property(interface_name, property_name)
599
if prop._dbus_access == u"write":
600
raise DBusPropertyAccessException(property_name)
601
value = prop()
602
if not hasattr(value, u"variant_level"):
603
return value
604
return type(value)(value, variant_level=value.variant_level+1)
605
606
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
607
def Set(self, interface_name, property_name, value):
608
"""Standard D-Bus property Set() method, see D-Bus standard.
609
"""
610
prop = self._get_dbus_property(interface_name, property_name)
611
if prop._dbus_access == u"read":
612
raise DBusPropertyAccessException(property_name)
613
if prop._dbus_get_args_options[u"byte_arrays"]:
614
# The byte_arrays option is not supported yet on
615
# signatures other than "ay".
616
if prop._dbus_signature != u"ay":
617
raise ValueError
618
value = dbus.ByteArray(''.join(unichr(byte)
619
for byte in value))
620
prop(value)
621
622
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
623
out_signature=u"a{sv}")
624
def GetAll(self, interface_name):
625
"""Standard D-Bus property GetAll() method, see D-Bus
626
standard.
627
628
Note: Will not include properties with access="write".
629
"""
630
all = {}
631
for name, prop in self._get_all_dbus_properties():
632
if (interface_name
633
and interface_name != prop._dbus_interface):
634
# Interface non-empty but did not match
635
continue
636
# Ignore write-only properties
637
if prop._dbus_access == u"write":
638
continue
639
value = prop()
640
if not hasattr(value, u"variant_level"):
641
all[name] = value
642
continue
643
all[name] = type(value)(value, variant_level=
644
value.variant_level+1)
645
return dbus.Dictionary(all, signature=u"sv")
646
647
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
648
out_signature=u"s",
649
path_keyword='object_path',
650
connection_keyword='connection')
651
def Introspect(self, object_path, connection):
652
"""Standard D-Bus method, overloaded to insert property tags.
653
"""
654
xmlstring = dbus.service.Object.Introspect(self, object_path,
655
connection)
656
try:
657
document = xml.dom.minidom.parseString(xmlstring)
658
def make_tag(document, name, prop):
659
e = document.createElement(u"property")
660
e.setAttribute(u"name", name)
661
e.setAttribute(u"type", prop._dbus_signature)
662
e.setAttribute(u"access", prop._dbus_access)
663
return e
664
for if_tag in document.getElementsByTagName(u"interface"):
665
for tag in (make_tag(document, name, prop)
666
for name, prop
667
in self._get_all_dbus_properties()
668
if prop._dbus_interface
669
== if_tag.getAttribute(u"name")):
670
if_tag.appendChild(tag)
671
# Add the names to the return values for the
672
# "org.freedesktop.DBus.Properties" methods
673
if (if_tag.getAttribute(u"name")
674
== u"org.freedesktop.DBus.Properties"):
675
for cn in if_tag.getElementsByTagName(u"method"):
676
if cn.getAttribute(u"name") == u"Get":
677
for arg in cn.getElementsByTagName(u"arg"):
678
if (arg.getAttribute(u"direction")
679
== u"out"):
680
arg.setAttribute(u"name", u"value")
681
elif cn.getAttribute(u"name") == u"GetAll":
682
for arg in cn.getElementsByTagName(u"arg"):
683
if (arg.getAttribute(u"direction")
684
== u"out"):
685
arg.setAttribute(u"name", u"props")
686
xmlstring = document.toxml(u"utf-8")
687
document.unlink()
688
except (AttributeError, xml.dom.DOMException,
689
xml.parsers.expat.ExpatError), error:
690
logger.error(u"Failed to override Introspection method",
691
error)
692
return xmlstring
693
694
695
class ClientDBus(Client, DBusObjectWithProperties):
696
"""A Client class using D-Bus
697
698
Attributes:
699
dbus_object_path: dbus.ObjectPath
700
bus: dbus.SystemBus()
701
"""
702
# dbus.service.Object doesn't use super(), so we can't either.
703
704
def __init__(self, bus = None, *args, **kwargs):
705
self.bus = bus
706
Client.__init__(self, *args, **kwargs)
707
# Only now, when this client is initialized, can it show up on
708
# the D-Bus
709
self.dbus_object_path = (dbus.ObjectPath
710
(u"/clients/"
711
+ self.name.replace(u".", u"_")))
712
DBusObjectWithProperties.__init__(self, self.bus,
713
self.dbus_object_path)
714
715
@staticmethod
716
def _datetime_to_dbus(dt, variant_level=0):
717
"""Convert a UTC datetime.datetime() to a D-Bus type."""
718
return dbus.String(dt.isoformat(),
719
variant_level=variant_level)
720
721
def enable(self):
722
oldstate = getattr(self, u"enabled", False)
723
r = Client.enable(self)
724
if oldstate != self.enabled:
725
# Emit D-Bus signals
726
self.PropertyChanged(dbus.String(u"enabled"),
727
dbus.Boolean(True, variant_level=1))
728
self.PropertyChanged(
729
dbus.String(u"last_enabled"),
730
self._datetime_to_dbus(self.last_enabled,
731
variant_level=1))
732
return r
733
734
def disable(self, quiet = False):
735
oldstate = getattr(self, u"enabled", False)
736
r = Client.disable(self, quiet=quiet)
737
if not quiet and oldstate != self.enabled:
738
# Emit D-Bus signal
739
self.PropertyChanged(dbus.String(u"enabled"),
740
dbus.Boolean(False, variant_level=1))
741
return r
742
743
def __del__(self, *args, **kwargs):
744
try:
745
self.remove_from_connection()
746
except LookupError:
747
pass
748
if hasattr(DBusObjectWithProperties, u"__del__"):
749
DBusObjectWithProperties.__del__(self, *args, **kwargs)
750
Client.__del__(self, *args, **kwargs)
751
752
def checker_callback(self, pid, condition, command,
753
*args, **kwargs):
754
self.checker_callback_tag = None
755
self.checker = None
756
# Emit D-Bus signal
757
self.PropertyChanged(dbus.String(u"checker_running"),
758
dbus.Boolean(False, variant_level=1))
759
if os.WIFEXITED(condition):
760
exitstatus = os.WEXITSTATUS(condition)
761
# Emit D-Bus signal
762
self.CheckerCompleted(dbus.Int16(exitstatus),
763
dbus.Int64(condition),
764
dbus.String(command))
765
else:
766
# Emit D-Bus signal
767
self.CheckerCompleted(dbus.Int16(-1),
768
dbus.Int64(condition),
769
dbus.String(command))
770
771
return Client.checker_callback(self, pid, condition, command,
772
*args, **kwargs)
773
774
def checked_ok(self, *args, **kwargs):
775
r = Client.checked_ok(self, *args, **kwargs)
776
# Emit D-Bus signal
777
self.PropertyChanged(
778
dbus.String(u"last_checked_ok"),
779
(self._datetime_to_dbus(self.last_checked_ok,
780
variant_level=1)))
781
return r
782
783
def start_checker(self, *args, **kwargs):
784
old_checker = self.checker
785
if self.checker is not None:
786
old_checker_pid = self.checker.pid
787
else:
788
old_checker_pid = None
789
r = Client.start_checker(self, *args, **kwargs)
790
# Only if new checker process was started
791
if (self.checker is not None
792
and old_checker_pid != self.checker.pid):
793
# Emit D-Bus signal
794
self.CheckerStarted(self.current_checker_command)
795
self.PropertyChanged(
796
dbus.String(u"checker_running"),
797
dbus.Boolean(True, variant_level=1))
798
return r
799
800
def stop_checker(self, *args, **kwargs):
801
old_checker = getattr(self, u"checker", None)
802
r = Client.stop_checker(self, *args, **kwargs)
803
if (old_checker is not None
804
and getattr(self, u"checker", None) is None):
445
805
self.PropertyChanged(dbus.String(u"checker_running"),
446
806
dbus.Boolean(False, variant_level=1))
447
448
def still_valid(self):
449
"""Has the timeout not yet passed for this client?"""
450
if not getattr(self, "enabled", False):
451
return False
452
now = datetime.datetime.utcnow()
453
if self.last_checked_ok is None:
454
return now < (self.created + self.timeout)
455
else:
456
return now < (self.last_checked_ok + self.timeout)
457
458
## D-Bus methods & signals
807
return r
808
809
def _reset_approved(self):
810
self._approved = None
811
return False
812
813
def approve(self, value=True):
814
self._approved = value
815
gobject.timeout_add(self._timedelta_to_milliseconds(self.approved_duration, self._reset_approved))
816
817
def approved_pending(self):
818
return self.approvals_pending > 0
819
820
821
## D-Bus methods, signals & properties
459
822
_interface = u"se.bsnet.fukt.Mandos.Client"
460
823
461
# CheckedOK - method
462
CheckedOK = dbus.service.method(_interface)(checked_ok)
463
CheckedOK.__name__ = "CheckedOK"
824
## Signals
464
825
465
826
# CheckerCompleted - signal
466
@dbus.service.signal(_interface, signature="nxs")
827
@dbus.service.signal(_interface, signature=u"nxs")
467
828
def CheckerCompleted(self, exitcode, waitstatus, command):
468
829
"D-Bus signal"
469
830
pass
470
831
471
832
# CheckerStarted - signal
472
@dbus.service.signal(_interface, signature="s")
833
@dbus.service.signal(_interface, signature=u"s")
473
834
def CheckerStarted(self, command):
474
835
"D-Bus signal"
475
836
pass
476
837
477
# GetAllProperties - method
478
@dbus.service.method(_interface, out_signature="a{sv}")
479
def GetAllProperties(self):
480
"D-Bus method"
481
return dbus.Dictionary({
482
dbus.String("name"):
483
dbus.String(self.name, variant_level=1),
484
dbus.String("fingerprint"):
485
dbus.String(self.fingerprint, variant_level=1),
486
dbus.String("host"):
487
dbus.String(self.host, variant_level=1),
488
dbus.String("created"):
489
_datetime_to_dbus(self.created, variant_level=1),
490
dbus.String("last_enabled"):
491
(_datetime_to_dbus(self.last_enabled,
492
variant_level=1)
493
if self.last_enabled is not None
494
else dbus.Boolean(False, variant_level=1)),
495
dbus.String("enabled"):
496
dbus.Boolean(self.enabled, variant_level=1),
497
dbus.String("last_checked_ok"):
498
(_datetime_to_dbus(self.last_checked_ok,
499
variant_level=1)
500
if self.last_checked_ok is not None
501
else dbus.Boolean (False, variant_level=1)),
502
dbus.String("timeout"):
503
dbus.UInt64(self.timeout_milliseconds(),
504
variant_level=1),
505
dbus.String("interval"):
506
dbus.UInt64(self.interval_milliseconds(),
507
variant_level=1),
508
dbus.String("checker"):
509
dbus.String(self.checker_command,
510
variant_level=1),
511
dbus.String("checker_running"):
512
dbus.Boolean(self.checker is not None,
513
variant_level=1),
514
dbus.String("object_path"):
515
dbus.ObjectPath(self.dbus_object_path,
516
variant_level=1)
517
}, signature="sv")
518
519
# IsStillValid - method
520
IsStillValid = (dbus.service.method(_interface, out_signature="b")
521
(still_valid))
522
IsStillValid.__name__ = "IsStillValid"
523
524
838
# PropertyChanged - signal
525
@dbus.service.signal(_interface, signature="sv")
839
@dbus.service.signal(_interface, signature=u"sv")
526
840
def PropertyChanged(self, property, value):
527
841
"D-Bus signal"
528
842
pass
529
843
530
# SetChecker - method
531
@dbus.service.method(_interface, in_signature="s")
532
def SetChecker(self, checker):
533
"D-Bus setter method"
534
self.checker_command = checker
535
# Emit D-Bus signal
536
self.PropertyChanged(dbus.String(u"checker"),
537
dbus.String(self.checker_command,
538
variant_level=1))
539
540
# SetHost - method
541
@dbus.service.method(_interface, in_signature="s")
542
def SetHost(self, host):
543
"D-Bus setter method"
544
self.host = host
545
# Emit D-Bus signal
546
self.PropertyChanged(dbus.String(u"host"),
547
dbus.String(self.host, variant_level=1))
548
549
# SetInterval - method
550
@dbus.service.method(_interface, in_signature="t")
551
def SetInterval(self, milliseconds):
552
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
553
# Emit D-Bus signal
554
self.PropertyChanged(dbus.String(u"interval"),
555
(dbus.UInt64(self.interval_milliseconds(),
556
variant_level=1)))
557
558
# SetSecret - method
559
@dbus.service.method(_interface, in_signature="ay",
560
byte_arrays=True)
561
def SetSecret(self, secret):
562
"D-Bus setter method"
563
self.secret = str(secret)
564
565
# SetTimeout - method
566
@dbus.service.method(_interface, in_signature="t")
567
def SetTimeout(self, milliseconds):
568
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
569
# Emit D-Bus signal
570
self.PropertyChanged(dbus.String(u"timeout"),
571
(dbus.UInt64(self.timeout_milliseconds(),
572
variant_level=1)))
844
# GotSecret - signal
845
@dbus.service.signal(_interface)
846
def GotSecret(self):
847
"D-Bus signal"
848
if self.approved_pending():
849
self.PropertyChanged(dbus.String(u"checker_running"),
850
dbus.Boolean(False, variant_level=1))
851
852
# Rejected - signal
853
@dbus.service.signal(_interface, signature=u"s")
854
def Rejected(self, reason):
855
"D-Bus signal"
856
if self.approved_pending():
857
self.PropertyChanged(dbus.String(u"checker_running"),
858
dbus.Boolean(False, variant_level=1))
859
860
# NeedApproval - signal
861
@dbus.service.signal(_interface, signature=u"db")
862
def NeedApproval(self, timeout, default):
863
"D-Bus signal"
864
if not self.approved_pending():
865
self.PropertyChanged(dbus.String(u"approved_pending"),
866
dbus.Boolean(True, variant_level=1))
867
868
## Methods
869
870
# Approve - method
871
@dbus.service.method(_interface, in_signature=u"b")
872
def Approve(self, value):
873
self.approve(value)
874
875
# CheckedOK - method
876
@dbus.service.method(_interface)
877
def CheckedOK(self):
878
return self.checked_ok()
573
879
574
880
# Enable - method
575
Enable = dbus.service.method(_interface)(enable)
576
Enable.__name__ = "Enable"
881
@dbus.service.method(_interface)
882
def Enable(self):
883
"D-Bus method"
884
self.enable()
577
885
578
886
# StartChecker - method
579
887
@dbus.service.method(_interface)
588
896
self.disable()
589
897
590
898
# StopChecker - method
591
StopChecker = dbus.service.method(_interface)(stop_checker)
592
StopChecker.__name__ = "StopChecker"
899
@dbus.service.method(_interface)
900
def StopChecker(self):
901
self.stop_checker()
902
903
## Properties
904
905
# approved_pending - property
906
@dbus_service_property(_interface, signature=u"b", access=u"read")
907
def approved_pending_dbus_property(self):
908
return dbus.Boolean(self.approved_pending())
909
910
# approved_by_default - property
911
@dbus_service_property(_interface, signature=u"b",
912
access=u"readwrite")
913
def approved_by_default_dbus_property(self):
914
return dbus.Boolean(self.approved_by_default)
915
916
# approved_delay - property
917
@dbus_service_property(_interface, signature=u"t",
918
access=u"readwrite")
919
def approved_delay_dbus_property(self):
920
return dbus.UInt64(self.approved_delay_milliseconds())
921
922
# approved_duration - property
923
@dbus_service_property(_interface, signature=u"t",
924
access=u"readwrite")
925
def approved_duration_dbus_property(self):
926
return dbus.UInt64(self._timedelta_to_milliseconds(
927
self.approved_duration))
928
929
# name - property
930
@dbus_service_property(_interface, signature=u"s", access=u"read")
931
def name_dbus_property(self):
932
return dbus.String(self.name)
933
934
# fingerprint - property
935
@dbus_service_property(_interface, signature=u"s", access=u"read")
936
def fingerprint_dbus_property(self):
937
return dbus.String(self.fingerprint)
938
939
# host - property
940
@dbus_service_property(_interface, signature=u"s",
941
access=u"readwrite")
942
def host_dbus_property(self, value=None):
943
if value is None: # get
944
return dbus.String(self.host)
945
self.host = value
946
# Emit D-Bus signal
947
self.PropertyChanged(dbus.String(u"host"),
948
dbus.String(value, variant_level=1))
949
950
# created - property
951
@dbus_service_property(_interface, signature=u"s", access=u"read")
952
def created_dbus_property(self):
953
return dbus.String(self._datetime_to_dbus(self.created))
954
955
# last_enabled - property
956
@dbus_service_property(_interface, signature=u"s", access=u"read")
957
def last_enabled_dbus_property(self):
958
if self.last_enabled is None:
959
return dbus.String(u"")
960
return dbus.String(self._datetime_to_dbus(self.last_enabled))
961
962
# enabled - property
963
@dbus_service_property(_interface, signature=u"b",
964
access=u"readwrite")
965
def enabled_dbus_property(self, value=None):
966
if value is None: # get
967
return dbus.Boolean(self.enabled)
968
if value:
969
self.enable()
970
else:
971
self.disable()
972
973
# last_checked_ok - property
974
@dbus_service_property(_interface, signature=u"s",
975
access=u"readwrite")
976
def last_checked_ok_dbus_property(self, value=None):
977
if value is not None:
978
self.checked_ok()
979
return
980
if self.last_checked_ok is None:
981
return dbus.String(u"")
982
return dbus.String(self._datetime_to_dbus(self
983
.last_checked_ok))
984
985
# timeout - property
986
@dbus_service_property(_interface, signature=u"t",
987
access=u"readwrite")
988
def timeout_dbus_property(self, value=None):
989
if value is None: # get
990
return dbus.UInt64(self.timeout_milliseconds())
991
self.timeout = datetime.timedelta(0, 0, 0, value)
992
# Emit D-Bus signal
993
self.PropertyChanged(dbus.String(u"timeout"),
994
dbus.UInt64(value, variant_level=1))
995
if getattr(self, u"disable_initiator_tag", None) is None:
996
return
997
# Reschedule timeout
998
gobject.source_remove(self.disable_initiator_tag)
999
self.disable_initiator_tag = None
1000
time_to_die = (self.
1001
_timedelta_to_milliseconds((self
1002
.last_checked_ok
1003
+ self.timeout)
1004
- datetime.datetime
1005
.utcnow()))
1006
if time_to_die <= 0:
1007
# The timeout has passed
1008
self.disable()
1009
else:
1010
self.disable_initiator_tag = (gobject.timeout_add
1011
(time_to_die, self.disable))
1012
1013
# interval - property
1014
@dbus_service_property(_interface, signature=u"t",
1015
access=u"readwrite")
1016
def interval_dbus_property(self, value=None):
1017
if value is None: # get
1018
return dbus.UInt64(self.interval_milliseconds())
1019
self.interval = datetime.timedelta(0, 0, 0, value)
1020
# Emit D-Bus signal
1021
self.PropertyChanged(dbus.String(u"interval"),
1022
dbus.UInt64(value, variant_level=1))
1023
if getattr(self, u"checker_initiator_tag", None) is None:
1024
return
1025
# Reschedule checker run
1026
gobject.source_remove(self.checker_initiator_tag)
1027
self.checker_initiator_tag = (gobject.timeout_add
1028
(value, self.start_checker))
1029
self.start_checker() # Start one now, too
1030
1031
# checker - property
1032
@dbus_service_property(_interface, signature=u"s",
1033
access=u"readwrite")
1034
def checker_dbus_property(self, value=None):
1035
if value is None: # get
1036
return dbus.String(self.checker_command)
1037
self.checker_command = value
1038
# Emit D-Bus signal
1039
self.PropertyChanged(dbus.String(u"checker"),
1040
dbus.String(self.checker_command,
1041
variant_level=1))
1042
1043
# checker_running - property
1044
@dbus_service_property(_interface, signature=u"b",
1045
access=u"readwrite")
1046
def checker_running_dbus_property(self, value=None):
1047
if value is None: # get
1048
return dbus.Boolean(self.checker is not None)
1049
if value:
1050
self.start_checker()
1051
else:
1052
self.stop_checker()
1053
1054
# object_path - property
1055
@dbus_service_property(_interface, signature=u"o", access=u"read")
1056
def object_path_dbus_property(self):
1057
return self.dbus_object_path # is already a dbus.ObjectPath
1058
1059
# secret = property
1060
@dbus_service_property(_interface, signature=u"ay",
1061
access=u"write", byte_arrays=True)
1062
def secret_dbus_property(self, value):
1063
self.secret = str(value)
593
1064
594
1065
del _interface
595
1066
596
1067
597
def peer_certificate(session):
598
"Return the peer's OpenPGP certificate as a bytestring"
599
# If not an OpenPGP certificate...
600
if (gnutls.library.functions
601
.gnutls_certificate_type_get(session._c_object)
602
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
603
# ...do the normal thing
604
return session.peer_certificate
605
list_size = ctypes.c_uint(1)
606
cert_list = (gnutls.library.functions
607
.gnutls_certificate_get_peers
608
(session._c_object, ctypes.byref(list_size)))
609
if not bool(cert_list) and list_size.value != 0:
610
raise gnutls.errors.GNUTLSError("error getting peer"
611
" certificate")
612
if list_size.value == 0:
613
return None
614
cert = cert_list[0]
615
return ctypes.string_at(cert.data, cert.size)
616
617
618
def fingerprint(openpgp):
619
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
620
# New GnuTLS "datum" with the OpenPGP public key
621
datum = (gnutls.library.types
622
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
623
ctypes.POINTER
624
(ctypes.c_ubyte)),
625
ctypes.c_uint(len(openpgp))))
626
# New empty GnuTLS certificate
627
crt = gnutls.library.types.gnutls_openpgp_crt_t()
628
(gnutls.library.functions
629
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
630
# Import the OpenPGP public key into the certificate
631
(gnutls.library.functions
632
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
633
gnutls.library.constants
634
.GNUTLS_OPENPGP_FMT_RAW))
635
# Verify the self signature in the key
636
crtverify = ctypes.c_uint()
637
(gnutls.library.functions
638
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
639
if crtverify.value != 0:
640
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
641
raise gnutls.errors.CertificateSecurityError("Verify failed")
642
# New buffer for the fingerprint
643
buf = ctypes.create_string_buffer(20)
644
buf_len = ctypes.c_size_t()
645
# Get the fingerprint from the certificate into the buffer
646
(gnutls.library.functions
647
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
648
ctypes.byref(buf_len)))
649
# Deinit the certificate
650
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
651
# Convert the buffer to a Python bytestring
652
fpr = ctypes.string_at(buf, buf_len.value)
653
# Convert the bytestring to hexadecimal notation
654
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
655
return hex_fpr
656
657
658
class TCP_handler(SocketServer.BaseRequestHandler, object):
659
"""A TCP request handler class.
660
Instantiated by IPv6_TCPServer for each request to handle it.
1068
class ProxyClient(object):
1069
def __init__(self, child_pipe, fpr, address):
1070
self._pipe = child_pipe
1071
self._pipe.send(('init', fpr, address))
1072
if not self._pipe.recv():
1073
raise KeyError()
1074
1075
def __getattribute__(self, name):
1076
if(name == '_pipe'):
1077
return super(ProxyClient, self).__getattribute__(name)
1078
self._pipe.send(('getattr', name))
1079
data = self._pipe.recv()
1080
if data[0] == 'data':
1081
return data[1]
1082
if data[0] == 'function':
1083
def func(*args, **kwargs):
1084
self._pipe.send(('funcall', name, args, kwargs))
1085
return self._pipe.recv()[1]
1086
return func
1087
1088
def __setattr__(self, name, value):
1089
if(name == '_pipe'):
1090
return super(ProxyClient, self).__setattr__(name, value)
1091
self._pipe.send(('setattr', name, value))
1092
1093
1094
class ClientHandler(socketserver.BaseRequestHandler, object):
1095
"""A class to handle client connections.
1096
1097
Instantiated once for each connection to handle it.
661
1098
Note: This will run in its own forked process."""
662
1099
663
1100
def handle(self):
664
logger.info(u"TCP connection from: %s",
665
unicode(self.client_address))
666
session = (gnutls.connection
667
.ClientSession(self.request,
668
gnutls.connection
669
.X509Credentials()))
670
671
line = self.request.makefile().readline()
672
logger.debug(u"Protocol version: %r", line)
673
try:
674
if int(line.strip().split()[0]) > 1:
675
raise RuntimeError
676
except (ValueError, IndexError, RuntimeError), error:
677
logger.error(u"Unknown protocol version: %s", error)
678
return
679
680
# Note: gnutls.connection.X509Credentials is really a generic
681
# GnuTLS certificate credentials object so long as no X.509
682
# keys are added to it. Therefore, we can use it here despite
683
# using OpenPGP certificates.
684
685
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
686
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
687
# "+DHE-DSS"))
688
# Use a fallback default, since this MUST be set.
689
priority = self.server.settings.get("priority", "NORMAL")
690
(gnutls.library.functions
691
.gnutls_priority_set_direct(session._c_object,
692
priority, None))
693
694
try:
695
session.handshake()
696
except gnutls.errors.GNUTLSError, error:
697
logger.warning(u"Handshake failed: %s", error)
698
# Do not run session.bye() here: the session is not
699
# established. Just abandon the request.
700
return
701
logger.debug(u"Handshake succeeded")
702
try:
703
fpr = fingerprint(peer_certificate(session))
704
except (TypeError, gnutls.errors.GNUTLSError), error:
705
logger.warning(u"Bad certificate: %s", error)
706
session.bye()
707
return
708
logger.debug(u"Fingerprint: %s", fpr)
709
710
for c in self.server.clients:
711
if c.fingerprint == fpr:
712
client = c
713
break
714
else:
715
logger.warning(u"Client not found for fingerprint: %s",
716
fpr)
717
session.bye()
718
return
719
# Have to check if client.still_valid(), since it is possible
720
# that the client timed out while establishing the GnuTLS
721
# session.
722
if not client.still_valid():
723
logger.warning(u"Client %(name)s is invalid",
724
vars(client))
725
session.bye()
726
return
727
## This won't work here, since we're in a fork.
728
# client.checked_ok()
729
sent_size = 0
730
while sent_size < len(client.secret):
731
sent = session.send(client.secret[sent_size:])
732
logger.debug(u"Sent: %d, remaining: %d",
733
sent, len(client.secret)
734
- (sent_size + sent))
735
sent_size += sent
736
session.bye()
737
738
739
class IPv6_TCPServer(SocketServer.ForkingMixIn,
740
SocketServer.TCPServer, object):
741
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1101
with contextlib.closing(self.server.child_pipe) as child_pipe:
1102
logger.info(u"TCP connection from: %s",
1103
unicode(self.client_address))
1104
logger.debug(u"Pipe FD: %d",
1105
self.server.child_pipe.fileno())
1106
1107
session = (gnutls.connection
1108
.ClientSession(self.request,
1109
gnutls.connection
1110
.X509Credentials()))
1111
1112
# Note: gnutls.connection.X509Credentials is really a
1113
# generic GnuTLS certificate credentials object so long as
1114
# no X.509 keys are added to it. Therefore, we can use it
1115
# here despite using OpenPGP certificates.
1116
1117
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1118
# u"+AES-256-CBC", u"+SHA1",
1119
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1120
# u"+DHE-DSS"))
1121
# Use a fallback default, since this MUST be set.
1122
priority = self.server.gnutls_priority
1123
if priority is None:
1124
priority = u"NORMAL"
1125
(gnutls.library.functions
1126
.gnutls_priority_set_direct(session._c_object,
1127
priority, None))
1128
1129
# Start communication using the Mandos protocol
1130
# Get protocol number
1131
line = self.request.makefile().readline()
1132
logger.debug(u"Protocol version: %r", line)
1133
try:
1134
if int(line.strip().split()[0]) > 1:
1135
raise RuntimeError
1136
except (ValueError, IndexError, RuntimeError), error:
1137
logger.error(u"Unknown protocol version: %s", error)
1138
return
1139
1140
# Start GnuTLS connection
1141
try:
1142
session.handshake()
1143
except gnutls.errors.GNUTLSError, error:
1144
logger.warning(u"Handshake failed: %s", error)
1145
# Do not run session.bye() here: the session is not
1146
# established. Just abandon the request.
1147
return
1148
logger.debug(u"Handshake succeeded")
1149
1150
approval_required = False
1151
try:
1152
try:
1153
fpr = self.fingerprint(self.peer_certificate
1154
(session))
1155
except (TypeError, gnutls.errors.GNUTLSError), error:
1156
logger.warning(u"Bad certificate: %s", error)
1157
return
1158
logger.debug(u"Fingerprint: %s", fpr)
1159
1160
try:
1161
client = ProxyClient(child_pipe, fpr,
1162
self.client_address)
1163
except KeyError:
1164
return
1165
1166
if client.approved_delay:
1167
delay = client.approved_delay
1168
client.approvals_pending += 1
1169
approval_required = True
1170
1171
while True:
1172
if not client.enabled:
1173
logger.warning(u"Client %s is disabled",
1174
client.name)
1175
if self.server.use_dbus:
1176
# Emit D-Bus signal
1177
client.Rejected("Disabled")
1178
return
1179
1180
if client._approved or not client.approved_delay:
1181
#We are approved or approval is disabled
1182
break
1183
elif client._approved is None:
1184
logger.info(u"Client %s need approval",
1185
client.name)
1186
if self.server.use_dbus:
1187
# Emit D-Bus signal
1188
client.NeedApproval(
1189
client.approved_delay_milliseconds(),
1190
client.approved_by_default)
1191
else:
1192
logger.warning(u"Client %s was not approved",
1193
client.name)
1194
if self.server.use_dbus:
1195
# Emit D-Bus signal
1196
client.Rejected("Disapproved")
1197
return
1198
1199
#wait until timeout or approved
1200
#x = float(client._timedelta_to_milliseconds(delay))
1201
time = datetime.datetime.now()
1202
client.changedstate.acquire()
1203
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1204
client.changedstate.release()
1205
time2 = datetime.datetime.now()
1206
if (time2 - time) >= delay:
1207
if not client.approved_by_default:
1208
logger.warning("Client %s timed out while"
1209
" waiting for approval",
1210
client.name)
1211
if self.server.use_dbus:
1212
# Emit D-Bus signal
1213
client.Rejected("Time out")
1214
return
1215
else:
1216
break
1217
else:
1218
delay -= time2 - time
1219
1220
sent_size = 0
1221
while sent_size < len(client.secret):
1222
# XXX handle session exception
1223
sent = session.send(client.secret[sent_size:])
1224
logger.debug(u"Sent: %d, remaining: %d",
1225
sent, len(client.secret)
1226
- (sent_size + sent))
1227
sent_size += sent
1228
1229
logger.info(u"Sending secret to %s", client.name)
1230
# bump the timeout as if seen
1231
client.checked_ok()
1232
if self.server.use_dbus:
1233
# Emit D-Bus signal
1234
client.GotSecret()
1235
1236
finally:
1237
if approval_required:
1238
client.approvals_pending -= 1
1239
session.bye()
1240
1241
@staticmethod
1242
def peer_certificate(session):
1243
"Return the peer's OpenPGP certificate as a bytestring"
1244
# If not an OpenPGP certificate...
1245
if (gnutls.library.functions
1246
.gnutls_certificate_type_get(session._c_object)
1247
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1248
# ...do the normal thing
1249
return session.peer_certificate
1250
list_size = ctypes.c_uint(1)
1251
cert_list = (gnutls.library.functions
1252
.gnutls_certificate_get_peers
1253
(session._c_object, ctypes.byref(list_size)))
1254
if not bool(cert_list) and list_size.value != 0:
1255
raise gnutls.errors.GNUTLSError(u"error getting peer"
1256
u" certificate")
1257
if list_size.value == 0:
1258
return None
1259
cert = cert_list[0]
1260
return ctypes.string_at(cert.data, cert.size)
1261
1262
@staticmethod
1263
def fingerprint(openpgp):
1264
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1265
# New GnuTLS "datum" with the OpenPGP public key
1266
datum = (gnutls.library.types
1267
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1268
ctypes.POINTER
1269
(ctypes.c_ubyte)),
1270
ctypes.c_uint(len(openpgp))))
1271
# New empty GnuTLS certificate
1272
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1273
(gnutls.library.functions
1274
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1275
# Import the OpenPGP public key into the certificate
1276
(gnutls.library.functions
1277
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1278
gnutls.library.constants
1279
.GNUTLS_OPENPGP_FMT_RAW))
1280
# Verify the self signature in the key
1281
crtverify = ctypes.c_uint()
1282
(gnutls.library.functions
1283
.gnutls_openpgp_crt_verify_self(crt, 0,
1284
ctypes.byref(crtverify)))
1285
if crtverify.value != 0:
1286
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1287
raise (gnutls.errors.CertificateSecurityError
1288
(u"Verify failed"))
1289
# New buffer for the fingerprint
1290
buf = ctypes.create_string_buffer(20)
1291
buf_len = ctypes.c_size_t()
1292
# Get the fingerprint from the certificate into the buffer
1293
(gnutls.library.functions
1294
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1295
ctypes.byref(buf_len)))
1296
# Deinit the certificate
1297
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1298
# Convert the buffer to a Python bytestring
1299
fpr = ctypes.string_at(buf, buf_len.value)
1300
# Convert the bytestring to hexadecimal notation
1301
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1302
return hex_fpr
1303
1304
1305
class MultiprocessingMixIn(object):
1306
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1307
def sub_process_main(self, request, address):
1308
try:
1309
self.finish_request(request, address)
1310
except:
1311
self.handle_error(request, address)
1312
self.close_request(request)
1313
1314
def process_request(self, request, address):
1315
"""Start a new process to process the request."""
1316
multiprocessing.Process(target = self.sub_process_main,
1317
args = (request, address)).start()
1318
1319
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1320
""" adds a pipe to the MixIn """
1321
def process_request(self, request, client_address):
1322
"""Overrides and wraps the original process_request().
1323
1324
This function creates a new pipe in self.pipe
1325
"""
1326
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1327
1328
super(MultiprocessingMixInWithPipe,
1329
self).process_request(request, client_address)
1330
self.add_pipe(parent_pipe)
1331
def add_pipe(self, parent_pipe):
1332
"""Dummy function; override as necessary"""
1333
pass
1334
1335
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1336
socketserver.TCPServer, object):
1337
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1338
742
1339
Attributes:
743
settings: Server settings
744
clients: Set() of Client objects
745
1340
enabled: Boolean; whether this server is activated yet
1341
interface: None or a network interface name (string)
1342
use_ipv6: Boolean; to use IPv6 or not
746
1343
"""
747
address_family = socket.AF_INET6
748
def __init__(self, *args, **kwargs):
749
if "settings" in kwargs:
750
self.settings = kwargs["settings"]
751
del kwargs["settings"]
752
if "clients" in kwargs:
753
self.clients = kwargs["clients"]
754
del kwargs["clients"]
755
self.enabled = False
756
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1344
def __init__(self, server_address, RequestHandlerClass,
1345
interface=None, use_ipv6=True):
1346
self.interface = interface
1347
if use_ipv6:
1348
self.address_family = socket.AF_INET6
1349
socketserver.TCPServer.__init__(self, server_address,
1350
RequestHandlerClass)
757
1351
def server_bind(self):
758
1352
"""This overrides the normal server_bind() function
759
1353
to bind to an interface if one was specified, and also NOT to
760
1354
bind to an address or port if they were not specified."""
761
if self.settings["interface"]:
762
# 25 is from /usr/include/asm-i486/socket.h
763
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
764
try:
765
self.socket.setsockopt(socket.SOL_SOCKET,
766
SO_BINDTODEVICE,
767
self.settings["interface"])
768
except socket.error, error:
769
if error[0] == errno.EPERM:
770
logger.error(u"No permission to"
771
u" bind to interface %s",
772
self.settings["interface"])
773
else:
774
raise
1355
if self.interface is not None:
1356
if SO_BINDTODEVICE is None:
1357
logger.error(u"SO_BINDTODEVICE does not exist;"
1358
u" cannot bind to interface %s",
1359
self.interface)
1360
else:
1361
try:
1362
self.socket.setsockopt(socket.SOL_SOCKET,
1363
SO_BINDTODEVICE,
1364
str(self.interface
1365
+ u'\0'))
1366
except socket.error, error:
1367
if error[0] == errno.EPERM:
1368
logger.error(u"No permission to"
1369
u" bind to interface %s",
1370
self.interface)
1371
elif error[0] == errno.ENOPROTOOPT:
1372
logger.error(u"SO_BINDTODEVICE not available;"
1373
u" cannot bind to interface %s",
1374
self.interface)
1375
else:
1376
raise
775
1377
# Only bind(2) the socket if we really need to.
776
1378
if self.server_address[0] or self.server_address[1]:
777
1379
if not self.server_address[0]:
778
in6addr_any = "::"
779
self.server_address = (in6addr_any,
1380
if self.address_family == socket.AF_INET6:
1381
any_address = u"::" # in6addr_any
1382
else:
1383
any_address = socket.INADDR_ANY
1384
self.server_address = (any_address,
780
1385
self.server_address[1])
781
1386
elif not self.server_address[1]:
782
1387
self.server_address = (self.server_address[0],
783
1388
0)
784
# if self.settings["interface"]:
1389
# if self.interface:
785
1390
# self.server_address = (self.server_address[0],
786
1391
# 0, # port
787
1392
# 0, # flowinfo
788
1393
# if_nametoindex
789
# (self.settings
790
# ["interface"]))
791
return super(IPv6_TCPServer, self).server_bind()
1394
# (self.interface))
1395
return socketserver.TCPServer.server_bind(self)
1396
1397
1398
class MandosServer(IPv6_TCPServer):
1399
"""Mandos server.
1400
1401
Attributes:
1402
clients: set of Client objects
1403
gnutls_priority GnuTLS priority string
1404
use_dbus: Boolean; to emit D-Bus signals or not
1405
1406
Assumes a gobject.MainLoop event loop.
1407
"""
1408
def __init__(self, server_address, RequestHandlerClass,
1409
interface=None, use_ipv6=True, clients=None,
1410
gnutls_priority=None, use_dbus=True):
1411
self.enabled = False
1412
self.clients = clients
1413
if self.clients is None:
1414
self.clients = set()
1415
self.use_dbus = use_dbus
1416
self.gnutls_priority = gnutls_priority
1417
IPv6_TCPServer.__init__(self, server_address,
1418
RequestHandlerClass,
1419
interface = interface,
1420
use_ipv6 = use_ipv6)
792
1421
def server_activate(self):
793
1422
if self.enabled:
794
return super(IPv6_TCPServer, self).server_activate()
1423
return socketserver.TCPServer.server_activate(self)
795
1424
def enable(self):
796
1425
self.enabled = True
1426
def add_pipe(self, parent_pipe):
1427
# Call "handle_ipc" for both data and EOF events
1428
gobject.io_add_watch(parent_pipe.fileno(),
1429
gobject.IO_IN | gobject.IO_HUP,
1430
functools.partial(self.handle_ipc,
1431
parent_pipe = parent_pipe))
1432
1433
def handle_ipc(self, source, condition, parent_pipe=None,
1434
client_object=None):
1435
condition_names = {
1436
gobject.IO_IN: u"IN", # There is data to read.
1437
gobject.IO_OUT: u"OUT", # Data can be written (without
1438
# blocking).
1439
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1440
gobject.IO_ERR: u"ERR", # Error condition.
1441
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1442
# broken, usually for pipes and
1443
# sockets).
1444
}
1445
conditions_string = ' | '.join(name
1446
for cond, name in
1447
condition_names.iteritems()
1448
if cond & condition)
1449
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1450
conditions_string)
1451
1452
# Read a request from the child
1453
request = parent_pipe.recv()
1454
command = request[0]
1455
1456
if command == 'init':
1457
fpr = request[1]
1458
address = request[2]
1459
1460
for c in self.clients:
1461
if c.fingerprint == fpr:
1462
client = c
1463
break
1464
else:
1465
logger.warning(u"Client not found for fingerprint: %s, ad"
1466
u"dress: %s", fpr, address)
1467
if self.use_dbus:
1468
# Emit D-Bus signal
1469
mandos_dbus_service.ClientNotFound(fpr, address)
1470
parent_pipe.send(False)
1471
return False
1472
1473
gobject.io_add_watch(parent_pipe.fileno(),
1474
gobject.IO_IN | gobject.IO_HUP,
1475
functools.partial(self.handle_ipc,
1476
parent_pipe = parent_pipe,
1477
client_object = client))
1478
parent_pipe.send(True)
1479
# remove the old hook in favor of the new above hook on same fileno
1480
return False
1481
if command == 'funcall':
1482
funcname = request[1]
1483
args = request[2]
1484
kwargs = request[3]
1485
1486
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1487
1488
if command == 'getattr':
1489
attrname = request[1]
1490
if callable(client_object.__getattribute__(attrname)):
1491
parent_pipe.send(('function',))
1492
else:
1493
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1494
1495
if command == 'setattr':
1496
attrname = request[1]
1497
value = request[2]
1498
setattr(client_object, attrname, value)
1499
1500
return True
797
1501
798
1502
799
1503
def string_to_delta(interval):
800
1504
"""Parse a string and return a datetime.timedelta
801
1505
802
>>> string_to_delta('7d')
1506
>>> string_to_delta(u'7d')
803
1507
datetime.timedelta(7)
804
>>> string_to_delta('60s')
1508
>>> string_to_delta(u'60s')
805
1509
datetime.timedelta(0, 60)
806
>>> string_to_delta('60m')
1510
>>> string_to_delta(u'60m')
807
1511
datetime.timedelta(0, 3600)
808
>>> string_to_delta('24h')
1512
>>> string_to_delta(u'24h')
809
1513
datetime.timedelta(1)
810
1514
>>> string_to_delta(u'1w')
811
1515
datetime.timedelta(7)
812
>>> string_to_delta('5m 30s')
1516
>>> string_to_delta(u'5m 30s')
813
1517
datetime.timedelta(0, 330)
814
1518
"""
815
1519
timevalue = datetime.timedelta(0)
828
1532
elif suffix == u"w":
829
1533
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
830
1534
else:
831
raise ValueError
832
except (ValueError, IndexError):
833
raise ValueError
1535
raise ValueError(u"Unknown suffix %r" % suffix)
1536
except (ValueError, IndexError), e:
1537
raise ValueError(e.message)
834
1538
timevalue += delta
835
1539
return timevalue
836
1540
837
1541
838
def server_state_changed(state):
839
"""Derived from the Avahi example code"""
840
if state == avahi.SERVER_COLLISION:
841
logger.error(u"Zeroconf server name collision")
842
service.remove()
843
elif state == avahi.SERVER_RUNNING:
844
service.add()
845
846
847
def entry_group_state_changed(state, error):
848
"""Derived from the Avahi example code"""
849
logger.debug(u"Avahi state change: %i", state)
850
851
if state == avahi.ENTRY_GROUP_ESTABLISHED:
852
logger.debug(u"Zeroconf service established.")
853
elif state == avahi.ENTRY_GROUP_COLLISION:
854
logger.warning(u"Zeroconf service name collision.")
855
service.rename()
856
elif state == avahi.ENTRY_GROUP_FAILURE:
857
logger.critical(u"Avahi: Error in group state changed %s",
858
unicode(error))
859
raise AvahiGroupError(u"State changed: %s" % unicode(error))
860
861
1542
def if_nametoindex(interface):
862
"""Call the C function if_nametoindex(), or equivalent"""
1543
"""Call the C function if_nametoindex(), or equivalent
1544
1545
Note: This function cannot accept a unicode string."""
863
1546
global if_nametoindex
864
1547
try:
865
1548
if_nametoindex = (ctypes.cdll.LoadLibrary
866
(ctypes.util.find_library("c"))
1549
(ctypes.util.find_library(u"c"))
867
1550
.if_nametoindex)
868
1551
except (OSError, AttributeError):
869
if "struct" not in sys.modules:
870
import struct
871
if "fcntl" not in sys.modules:
872
import fcntl
1552
logger.warning(u"Doing if_nametoindex the hard way")
873
1553
def if_nametoindex(interface):
874
1554
"Get an interface index the hard way, i.e. using fcntl()"
875
1555
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
876
with closing(socket.socket()) as s:
1556
with contextlib.closing(socket.socket()) as s:
877
1557
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
878
struct.pack("16s16x", interface))
879
interface_index = struct.unpack("I", ifreq[16:20])[0]
1558
struct.pack(str(u"16s16x"),
1559
interface))
1560
interface_index = struct.unpack(str(u"I"),
1561
ifreq[16:20])[0]
880
1562
return interface_index
881
1563
return if_nametoindex(interface)
882
1564
883
1565
884
1566
def daemon(nochdir = False, noclose = False):
885
1567
"""See daemon(3). Standard BSD Unix function.
1568
886
1569
This should really exist as os.daemon, but it doesn't (yet)."""
887
1570
if os.fork():
888
1571
sys.exit()
889
1572
os.setsid()
890
1573
if not nochdir:
891
os.chdir("/")
1574
os.chdir(u"/")
892
1575
if os.fork():
893
1576
sys.exit()
894
1577
if not noclose:
896
1579
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
897
1580
if not stat.S_ISCHR(os.fstat(null).st_mode):
898
1581
raise OSError(errno.ENODEV,
899
"/dev/null not a character device")
1582
u"%s not a character device"
1583
% os.path.devnull)
900
1584
os.dup2(null, sys.stdin.fileno())
901
1585
os.dup2(null, sys.stdout.fileno())
902
1586
os.dup2(null, sys.stderr.fileno())
905
1589
906
1590
907
1591
def main():
1592
1593
##################################################################
1594
# Parsing of options, both command line and config file
1595
908
1596
parser = optparse.OptionParser(version = "%%prog %s" % version)
909
parser.add_option("-i", "--interface", type="string",
910
metavar="IF", help="Bind to interface IF")
911
parser.add_option("-a", "--address", type="string",
912
help="Address to listen for requests on")
913
parser.add_option("-p", "--port", type="int",
914
help="Port number to receive requests on")
915
parser.add_option("--check", action="store_true",
916
help="Run self-test")
917
parser.add_option("--debug", action="store_true",
918
help="Debug mode; run in foreground and log to"
919
" terminal")
920
parser.add_option("--priority", type="string", help="GnuTLS"
921
" priority string (see GnuTLS documentation)")
922
parser.add_option("--servicename", type="string", metavar="NAME",
923
help="Zeroconf service name")
924
parser.add_option("--configdir", type="string",
925
default="/etc/mandos", metavar="DIR",
926
help="Directory to search for configuration"
927
" files")
928
parser.add_option("--no-dbus", action="store_false",
929
dest="use_dbus",
930
help="Do not provide D-Bus system bus"
931
" interface")
1597
parser.add_option("-i", u"--interface", type=u"string",
1598
metavar="IF", help=u"Bind to interface IF")
1599
parser.add_option("-a", u"--address", type=u"string",
1600
help=u"Address to listen for requests on")
1601
parser.add_option("-p", u"--port", type=u"int",
1602
help=u"Port number to receive requests on")
1603
parser.add_option("--check", action=u"store_true",
1604
help=u"Run self-test")
1605
parser.add_option("--debug", action=u"store_true",
1606
help=u"Debug mode; run in foreground and log to"
1607
u" terminal")
1608
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1609
u" priority string (see GnuTLS documentation)")
1610
parser.add_option("--servicename", type=u"string",
1611
metavar=u"NAME", help=u"Zeroconf service name")
1612
parser.add_option("--configdir", type=u"string",
1613
default=u"/etc/mandos", metavar=u"DIR",
1614
help=u"Directory to search for configuration"
1615
u" files")
1616
parser.add_option("--no-dbus", action=u"store_false",
1617
dest=u"use_dbus", help=u"Do not provide D-Bus"
1618
u" system bus interface")
1619
parser.add_option("--no-ipv6", action=u"store_false",
1620
dest=u"use_ipv6", help=u"Do not use IPv6")
932
1621
options = parser.parse_args()[0]
933
1622
934
1623
if options.check:
937
1626
sys.exit()
938
1627
939
1628
# Default values for config file for server-global settings
940
server_defaults = { "interface": "",
941
"address": "",
942
"port": "",
943
"debug": "False",
944
"priority":
945
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
946
"servicename": "Mandos",
947
"use_dbus": "True",
1629
server_defaults = { u"interface": u"",
1630
u"address": u"",
1631
u"port": u"",
1632
u"debug": u"False",
1633
u"priority":
1634
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1635
u"servicename": u"Mandos",
1636
u"use_dbus": u"True",
1637
u"use_ipv6": u"True",
948
1638
}
949
1639
950
1640
# Parse config file for server-global settings
951
server_config = ConfigParser.SafeConfigParser(server_defaults)
1641
server_config = configparser.SafeConfigParser(server_defaults)
952
1642
del server_defaults
953
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1643
server_config.read(os.path.join(options.configdir,
1644
u"mandos.conf"))
954
1645
# Convert the SafeConfigParser object to a dict
955
1646
server_settings = server_config.defaults()
956
1647
# Use the appropriate methods on the non-string config options
957
server_settings["debug"] = server_config.getboolean("DEFAULT",
958
"debug")
959
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
960
"use_dbus")
1648
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1649
server_settings[option] = server_config.getboolean(u"DEFAULT",
1650
option)
961
1651
if server_settings["port"]:
962
server_settings["port"] = server_config.getint("DEFAULT",
963
"port")
1652
server_settings["port"] = server_config.getint(u"DEFAULT",
1653
u"port")
964
1654
del server_config
965
1655
966
1656
# Override the settings from the config file with command line
967
1657
# options, if set.
968
for option in ("interface", "address", "port", "debug",
969
"priority", "servicename", "configdir",
970
"use_dbus"):
1658
for option in (u"interface", u"address", u"port", u"debug",
1659
u"priority", u"servicename", u"configdir",
1660
u"use_dbus", u"use_ipv6"):
971
1661
value = getattr(options, option)
972
1662
if value is not None:
973
1663
server_settings[option] = value
974
1664
del options
1665
# Force all strings to be unicode
1666
for option in server_settings.keys():
1667
if type(server_settings[option]) is str:
1668
server_settings[option] = unicode(server_settings[option])
975
1669
# Now we have our good server settings in "server_settings"
976
1670
1671
##################################################################
1672
977
1673
# For convenience
978
debug = server_settings["debug"]
979
use_dbus = server_settings["use_dbus"]
1674
debug = server_settings[u"debug"]
1675
use_dbus = server_settings[u"use_dbus"]
1676
use_ipv6 = server_settings[u"use_ipv6"]
980
1677
981
1678
if not debug:
982
1679
syslogger.setLevel(logging.WARNING)
983
1680
console.setLevel(logging.WARNING)
984
1681
985
if server_settings["servicename"] != "Mandos":
1682
if server_settings[u"servicename"] != u"Mandos":
986
1683
syslogger.setFormatter(logging.Formatter
987
('Mandos (%s): %%(levelname)s:'
988
' %%(message)s'
989
% server_settings["servicename"]))
1684
(u'Mandos (%s) [%%(process)d]:'
1685
u' %%(levelname)s: %%(message)s'
1686
% server_settings[u"servicename"]))
990
1687
991
1688
# Parse config file with clients
992
client_defaults = { "timeout": "1h",
993
"interval": "5m",
994
"checker": "fping -q -- %%(host)s",
995
"host": "",
1689
client_defaults = { u"timeout": u"1h",
1690
u"interval": u"5m",
1691
u"checker": u"fping -q -- %%(host)s",
1692
u"host": u"",
1693
u"approved_delay": u"0s",
1694
u"approved_duration": u"1s",
996
1695
}
997
client_config = ConfigParser.SafeConfigParser(client_defaults)
998
client_config.read(os.path.join(server_settings["configdir"],
999
"clients.conf"))
1000
1001
clients = Set()
1002
tcp_server = IPv6_TCPServer((server_settings["address"],
1003
server_settings["port"]),
1004
TCP_handler,
1005
settings=server_settings,
1006
clients=clients)
1007
pidfilename = "/var/run/mandos.pid"
1696
client_config = configparser.SafeConfigParser(client_defaults)
1697
client_config.read(os.path.join(server_settings[u"configdir"],
1698
u"clients.conf"))
1699
1700
global mandos_dbus_service
1701
mandos_dbus_service = None
1702
1703
tcp_server = MandosServer((server_settings[u"address"],
1704
server_settings[u"port"]),
1705
ClientHandler,
1706
interface=server_settings[u"interface"],
1707
use_ipv6=use_ipv6,
1708
gnutls_priority=
1709
server_settings[u"priority"],
1710
use_dbus=use_dbus)
1711
pidfilename = u"/var/run/mandos.pid"
1008
1712
try:
1009
pidfile = open(pidfilename, "w")
1713
pidfile = open(pidfilename, u"w")
1010
1714
except IOError:
1011
logger.error("Could not open file %r", pidfilename)
1715
logger.error(u"Could not open file %r", pidfilename)
1012
1716
1013
1717
try:
1014
uid = pwd.getpwnam("_mandos").pw_uid
1015
gid = pwd.getpwnam("_mandos").pw_gid
1718
uid = pwd.getpwnam(u"_mandos").pw_uid
1719
gid = pwd.getpwnam(u"_mandos").pw_gid
1016
1720
except KeyError:
1017
1721
try:
1018
uid = pwd.getpwnam("mandos").pw_uid
1019
gid = pwd.getpwnam("mandos").pw_gid
1722
uid = pwd.getpwnam(u"mandos").pw_uid
1723
gid = pwd.getpwnam(u"mandos").pw_gid
1020
1724
except KeyError:
1021
1725
try:
1022
uid = pwd.getpwnam("nobody").pw_uid
1023
gid = pwd.getpwnam("nogroup").pw_gid
1726
uid = pwd.getpwnam(u"nobody").pw_uid
1727
gid = pwd.getpwnam(u"nobody").pw_gid
1024
1728
except KeyError:
1025
1729
uid = 65534
1026
1730
gid = 65534
1039
1743
1040
1744
@gnutls.library.types.gnutls_log_func
1041
1745
def debug_gnutls(level, string):
1042
logger.debug("GnuTLS: %s", string[:-1])
1746
logger.debug(u"GnuTLS: %s", string[:-1])
1043
1747
1044
1748
(gnutls.library.functions
1045
1749
.gnutls_global_set_log_function(debug_gnutls))
1046
1750
1047
global service
1048
service = AvahiService(name = server_settings["servicename"],
1049
servicetype = "_mandos._tcp", )
1050
if server_settings["interface"]:
1051
service.interface = (if_nametoindex
1052
(server_settings["interface"]))
1053
1054
1751
global main_loop
1055
global bus
1056
global server
1057
1752
# From the Avahi example code
1058
1753
DBusGMainLoop(set_as_default=True )
1059
1754
main_loop = gobject.MainLoop()
1060
1755
bus = dbus.SystemBus()
1061
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1062
avahi.DBUS_PATH_SERVER),
1063
avahi.DBUS_INTERFACE_SERVER)
1064
1756
# End of Avahi example code
1065
1757
if use_dbus:
1066
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1067
1068
clients.update(Set(Client(name = section,
1069
config
1070
= dict(client_config.items(section)),
1071
use_dbus = use_dbus)
1072
for section in client_config.sections()))
1073
if not clients:
1758
try:
1759
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1760
bus, do_not_queue=True)
1761
except dbus.exceptions.NameExistsException, e:
1762
logger.error(unicode(e) + u", disabling D-Bus")
1763
use_dbus = False
1764
server_settings[u"use_dbus"] = False
1765
tcp_server.use_dbus = False
1766
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1767
service = AvahiService(name = server_settings[u"servicename"],
1768
servicetype = u"_mandos._tcp",
1769
protocol = protocol, bus = bus)
1770
if server_settings["interface"]:
1771
service.interface = (if_nametoindex
1772
(str(server_settings[u"interface"])))
1773
1774
client_class = Client
1775
if use_dbus:
1776
client_class = functools.partial(ClientDBus, bus = bus)
1777
def client_config_items(config, section):
1778
special_settings = {
1779
"approved_by_default":
1780
lambda: config.getboolean(section,
1781
"approved_by_default"),
1782
}
1783
for name, value in config.items(section):
1784
try:
1785
yield (name, special_settings[name]())
1786
except KeyError:
1787
yield (name, value)
1788
1789
tcp_server.clients.update(set(
1790
client_class(name = section,
1791
config= dict(client_config_items(
1792
client_config, section)))
1793
for section in client_config.sections()))
1794
if not tcp_server.clients:
1074
1795
logger.warning(u"No clients defined")
1075
1796
1076
1797
if debug:
1086
1807
daemon()
1087
1808
1088
1809
try:
1089
pid = os.getpid()
1090
pidfile.write(str(pid) + "\n")
1091
pidfile.close()
1810
with pidfile:
1811
pid = os.getpid()
1812
pidfile.write(str(pid) + "\n")
1092
1813
del pidfile
1093
1814
except IOError:
1094
1815
logger.error(u"Could not write to file %r with PID %d",
1098
1819
pass
1099
1820
del pidfilename
1100
1821
1101
def cleanup():
1102
"Cleanup function; run on exit"
1103
global group
1104
# From the Avahi example code
1105
if not group is None:
1106
group.Free()
1107
group = None
1108
# End of Avahi example code
1109
1110
while clients:
1111
client = clients.pop()
1112
client.disable_hook = None
1113
client.disable()
1114
1115
atexit.register(cleanup)
1116
1117
1822
if not debug:
1118
1823
signal.signal(signal.SIGINT, signal.SIG_IGN)
1119
1824
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1120
1825
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1121
1826
1122
1827
if use_dbus:
1123
class MandosServer(dbus.service.Object):
1828
class MandosDBusService(dbus.service.Object):
1124
1829
"""A D-Bus proxy object"""
1125
1830
def __init__(self):
1126
dbus.service.Object.__init__(self, bus, "/")
1831
dbus.service.Object.__init__(self, bus, u"/")
1127
1832
_interface = u"se.bsnet.fukt.Mandos"
1128
1833
1129
@dbus.service.signal(_interface, signature="oa{sv}")
1130
def ClientAdded(self, objpath, properties):
1131
"D-Bus signal"
1132
pass
1133
1134
@dbus.service.signal(_interface, signature="os")
1834
@dbus.service.signal(_interface, signature=u"o")
1835
def ClientAdded(self, objpath):
1836
"D-Bus signal"
1837
pass
1838
1839
@dbus.service.signal(_interface, signature=u"ss")
1840
def ClientNotFound(self, fingerprint, address):
1841
"D-Bus signal"
1842
pass
1843
1844
@dbus.service.signal(_interface, signature=u"os")
1135
1845
def ClientRemoved(self, objpath, name):
1136
1846
"D-Bus signal"
1137
1847
pass
1138
1848
1139
@dbus.service.method(_interface, out_signature="ao")
1849
@dbus.service.method(_interface, out_signature=u"ao")
1140
1850
def GetAllClients(self):
1141
1851
"D-Bus method"
1142
return dbus.Array(c.dbus_object_path for c in clients)
1852
return dbus.Array(c.dbus_object_path
1853
for c in tcp_server.clients)
1143
1854
1144
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1855
@dbus.service.method(_interface,
1856
out_signature=u"a{oa{sv}}")
1145
1857
def GetAllClientsWithProperties(self):
1146
1858
"D-Bus method"
1147
1859
return dbus.Dictionary(
1148
((c.dbus_object_path, c.GetAllProperties())
1149
for c in clients),
1150
signature="oa{sv}")
1860
((c.dbus_object_path, c.GetAll(u""))
1861
for c in tcp_server.clients),
1862
signature=u"oa{sv}")
1151
1863
1152
@dbus.service.method(_interface, in_signature="o")
1864
@dbus.service.method(_interface, in_signature=u"o")
1153
1865
def RemoveClient(self, object_path):
1154
1866
"D-Bus method"
1155
for c in clients:
1867
for c in tcp_server.clients:
1156
1868
if c.dbus_object_path == object_path:
1157
clients.remove(c)
1869
tcp_server.clients.remove(c)
1870
c.remove_from_connection()
1158
1871
# Don't signal anything except ClientRemoved
1159
c.use_dbus = False
1160
c.disable()
1872
c.disable(quiet=True)
1161
1873
# Emit D-Bus signal
1162
1874
self.ClientRemoved(object_path, c.name)
1163
1875
return
1164
raise KeyError
1876
raise KeyError(object_path)
1165
1877
1166
1878
del _interface
1167
1879
1168
mandos_server = MandosServer()
1169
1170
for client in clients:
1880
mandos_dbus_service = MandosDBusService()
1881
1882
def cleanup():
1883
"Cleanup function; run on exit"
1884
service.cleanup()
1885
1886
while tcp_server.clients:
1887
client = tcp_server.clients.pop()
1888
if use_dbus:
1889
client.remove_from_connection()
1890
client.disable_hook = None
1891
# Don't signal anything except ClientRemoved
1892
client.disable(quiet=True)
1893
if use_dbus:
1894
# Emit D-Bus signal
1895
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1896
client.name)
1897
1898
atexit.register(cleanup)
1899
1900
for client in tcp_server.clients:
1171
1901
if use_dbus:
1172
1902
# Emit D-Bus signal
1173
mandos_server.ClientAdded(client.dbus_object_path,
1174
client.GetAllProperties())
1903
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1175
1904
client.enable()
1176
1905
1177
1906
tcp_server.enable()
1179
1908
1180
1909
# Find out what port we got
1181
1910
service.port = tcp_server.socket.getsockname()[1]
1182
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1183
u" scope_id %d" % tcp_server.socket.getsockname())
1911
if use_ipv6:
1912
logger.info(u"Now listening on address %r, port %d,"
1913
" flowinfo %d, scope_id %d"
1914
% tcp_server.socket.getsockname())
1915
else: # IPv4
1916
logger.info(u"Now listening on address %r, port %d"
1917
% tcp_server.socket.getsockname())
1184
1918
1185
1919
#service.interface = tcp_server.socket.getsockname()[3]
1186
1920
1187
1921
try:
1188
1922
# From the Avahi example code
1189
server.connect_to_signal("StateChanged", server_state_changed)
1190
1923
try:
1191
server_state_changed(server.GetState())
1924
service.activate()
1192
1925
except dbus.exceptions.DBusException, error:
1193
1926
logger.critical(u"DBusException: %s", error)
1927
cleanup()
1194
1928
sys.exit(1)
1195
1929
# End of Avahi example code
1196
1930
1203
1937
main_loop.run()
1204
1938
except AvahiError, error:
1205
1939
logger.critical(u"AvahiError: %s", error)
1940
cleanup()
1206
1941
sys.exit(1)
1207
1942
except KeyboardInterrupt:
1208
1943
if debug:
1209
1944
print >> sys.stderr
1210
logger.debug("Server received KeyboardInterrupt")
1211
logger.debug("Server exiting")
1945
logger.debug(u"Server received KeyboardInterrupt")
1946
logger.debug(u"Server exiting")
1947
# Must run before the D-Bus bus name gets deregistered
1948
cleanup()
1212
1949
1213
1950
if __name__ == '__main__':
1214
1951
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0