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- Committer: Teddy Hogeborn
- Date: 2010-09-12 03:00:40 UTC
- Revision ID: teddy@fukt.bsnet.se-20100912030040-b0uopyennste9fdh
Documentation changes:
* DBUS-API: New file documenting the server D-Bus interface.
* clients.conf: Add examples of new approval settings.
* debian/mandos.docs: Added "DBUS-API".
* mandos-clients.conf.xml (OPTIONS): Added "approved_by_default",
"approval_delay", and
"approval_duration".
* mandos.xml (D-BUS INTERFACE): Refer to the "DBUS-API" file.
(BUGS): Remove mention of lack of a remote query interface.
* DBUS-API: New file documenting the server D-Bus interface.
* clients.conf: Add examples of new approval settings.
* debian/mandos.docs: Added "DBUS-API".
* mandos-clients.conf.xml (OPTIONS): Added "approved_by_default",
"approval_delay", and
"approval_duration".
* mandos.xml (D-BUS INTERFACE): Refer to the "DBUS-API" file.
(BUGS): Remove mention of lack of a remote query interface.
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 = "1.0.8"
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.getLogger(u'mandos')
87
logger = logging.Logger(u'mandos')
72
88
syslogger = (logging.handlers.SysLogHandler
73
89
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
90
address = "/dev/log"))
75
91
syslogger.setFormatter(logging.Formatter
76
('Mandos [%(process)d]: %(levelname)s:'
77
' %(message)s'))
92
(u'Mandos [%(process)d]: %(levelname)s:'
93
u' %(message)s'))
78
94
logger.addHandler(syslogger)
79
95
80
96
console = logging.StreamHandler()
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
97
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
98
u' %(levelname)s:'
99
u' %(message)s'))
83
100
logger.addHandler(console)
84
101
85
102
class AvahiError(Exception):
98
115
99
116
class AvahiService(object):
100
117
"""An Avahi (Zeroconf) service.
118
101
119
Attributes:
102
120
interface: integer; avahi.IF_UNSPEC or an interface index.
103
121
Used to optionally bind to the specified interface.
104
name: string; Example: 'Mandos'
105
type: string; Example: '_mandos._tcp'.
122
name: string; Example: u'Mandos'
123
type: string; Example: u'_mandos._tcp'.
106
124
See <http://www.dns-sd.org/ServiceTypes.html>
107
125
port: integer; what port to announce
108
126
TXT: list of strings; TXT record for the service
111
129
max_renames: integer; maximum number of renames
112
130
rename_count: integer; counter so we only rename after collisions
113
131
a sensible number of times
132
group: D-Bus Entry Group
133
server: D-Bus Server
134
bus: dbus.SystemBus()
114
135
"""
115
136
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
137
servicetype = None, port = None, TXT = None,
117
domain = "", host = "", max_renames = 32768,
118
protocol = avahi.PROTO_UNSPEC):
138
domain = u"", host = u"", max_renames = 32768,
139
protocol = avahi.PROTO_UNSPEC, bus = None):
119
140
self.interface = interface
120
141
self.name = name
121
142
self.type = servicetype
126
147
self.rename_count = 0
127
148
self.max_renames = max_renames
128
149
self.protocol = protocol
150
self.group = None # our entry group
151
self.server = None
152
self.bus = bus
129
153
def rename(self):
130
154
"""Derived from the Avahi example code"""
131
155
if self.rename_count >= self.max_renames:
133
157
u" after %i retries, exiting.",
134
158
self.rename_count)
135
159
raise AvahiServiceError(u"Too many renames")
136
self.name = server.GetAlternativeServiceName(self.name)
160
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
137
161
logger.info(u"Changing Zeroconf service name to %r ...",
138
str(self.name))
162
self.name)
139
163
syslogger.setFormatter(logging.Formatter
140
('Mandos (%s) [%%(process)d]:'
141
' %%(levelname)s: %%(message)s'
164
(u'Mandos (%s) [%%(process)d]:'
165
u' %%(levelname)s: %%(message)s'
142
166
% self.name))
143
167
self.remove()
144
self.add()
168
try:
169
self.add()
170
except dbus.exceptions.DBusException, error:
171
logger.critical(u"DBusException: %s", error)
172
self.cleanup()
173
os._exit(1)
145
174
self.rename_count += 1
146
175
def remove(self):
147
176
"""Derived from the Avahi example code"""
148
if group is not None:
149
group.Reset()
177
if self.group is not None:
178
self.group.Reset()
150
179
def add(self):
151
180
"""Derived from the Avahi example code"""
152
global group
153
if group is None:
154
group = dbus.Interface(bus.get_object
155
(avahi.DBUS_NAME,
156
server.EntryGroupNew()),
157
avahi.DBUS_INTERFACE_ENTRY_GROUP)
158
group.connect_to_signal('StateChanged',
159
entry_group_state_changed)
181
if self.group is None:
182
self.group = dbus.Interface(
183
self.bus.get_object(avahi.DBUS_NAME,
184
self.server.EntryGroupNew()),
185
avahi.DBUS_INTERFACE_ENTRY_GROUP)
186
self.group.connect_to_signal('StateChanged',
187
self
188
.entry_group_state_changed)
160
189
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
161
service.name, service.type)
162
group.AddService(
163
self.interface, # interface
164
self.protocol, # protocol
165
dbus.UInt32(0), # flags
166
self.name, self.type,
167
self.domain, self.host,
168
dbus.UInt16(self.port),
169
avahi.string_array_to_txt_array(self.TXT))
170
group.Commit()
171
172
# From the Avahi example code:
173
group = None # our entry group
174
# End of Avahi example code
175
176
177
def _datetime_to_dbus(dt, variant_level=0):
178
"""Convert a UTC datetime.datetime() to a D-Bus type."""
179
return dbus.String(dt.isoformat(), variant_level=variant_level)
190
self.name, self.type)
191
self.group.AddService(
192
self.interface,
193
self.protocol,
194
dbus.UInt32(0), # flags
195
self.name, self.type,
196
self.domain, self.host,
197
dbus.UInt16(self.port),
198
avahi.string_array_to_txt_array(self.TXT))
199
self.group.Commit()
200
def entry_group_state_changed(self, state, error):
201
"""Derived from the Avahi example code"""
202
logger.debug(u"Avahi entry group state change: %i", state)
203
204
if state == avahi.ENTRY_GROUP_ESTABLISHED:
205
logger.debug(u"Zeroconf service established.")
206
elif state == avahi.ENTRY_GROUP_COLLISION:
207
logger.warning(u"Zeroconf service name collision.")
208
self.rename()
209
elif state == avahi.ENTRY_GROUP_FAILURE:
210
logger.critical(u"Avahi: Error in group state changed %s",
211
unicode(error))
212
raise AvahiGroupError(u"State changed: %s"
213
% unicode(error))
214
def cleanup(self):
215
"""Derived from the Avahi example code"""
216
if self.group is not None:
217
self.group.Free()
218
self.group = None
219
def server_state_changed(self, state):
220
"""Derived from the Avahi example code"""
221
logger.debug(u"Avahi server state change: %i", state)
222
if state == avahi.SERVER_COLLISION:
223
logger.error(u"Zeroconf server name collision")
224
self.remove()
225
elif state == avahi.SERVER_RUNNING:
226
self.add()
227
def activate(self):
228
"""Derived from the Avahi example code"""
229
if self.server is None:
230
self.server = dbus.Interface(
231
self.bus.get_object(avahi.DBUS_NAME,
232
avahi.DBUS_PATH_SERVER),
233
avahi.DBUS_INTERFACE_SERVER)
234
self.server.connect_to_signal(u"StateChanged",
235
self.server_state_changed)
236
self.server_state_changed(self.server.GetState())
180
237
181
238
182
239
class Client(object):
183
240
"""A representation of a client host served by this server.
241
184
242
Attributes:
185
243
name: string; from the config file, used in log messages and
186
244
D-Bus identifiers
193
251
enabled: bool()
194
252
last_checked_ok: datetime.datetime(); (UTC) or None
195
253
timeout: datetime.timedelta(); How long from last_checked_ok
196
until this client is invalid
254
until this client is disabled
197
255
interval: datetime.timedelta(); How often to start a new checker
198
256
disable_hook: If set, called by disable() as disable_hook(self)
199
257
checker: subprocess.Popen(); a running checker process used
200
258
to see if the client lives.
201
259
'None' if no process is running.
202
260
checker_initiator_tag: a gobject event source tag, or None
203
disable_initiator_tag: - '' -
261
disable_initiator_tag: - '' -
204
262
checker_callback_tag: - '' -
205
263
checker_command: string; External command which is run to check if
206
264
client lives. %() expansions are done at
207
265
runtime with vars(self) as dict, so that for
208
266
instance %(name)s can be used in the command.
209
267
current_checker_command: string; current running checker_command
268
approval_delay: datetime.timedelta(); Time to wait for approval
269
_approved: bool(); 'None' if not yet approved/disapproved
270
approval_duration: datetime.timedelta(); Duration of one approval
210
271
"""
272
273
@staticmethod
274
def _timedelta_to_milliseconds(td):
275
"Convert a datetime.timedelta() to milliseconds"
276
return ((td.days * 24 * 60 * 60 * 1000)
277
+ (td.seconds * 1000)
278
+ (td.microseconds // 1000))
279
211
280
def timeout_milliseconds(self):
212
281
"Return the 'timeout' attribute in milliseconds"
213
return ((self.timeout.days * 24 * 60 * 60 * 1000)
214
+ (self.timeout.seconds * 1000)
215
+ (self.timeout.microseconds // 1000))
282
return self._timedelta_to_milliseconds(self.timeout)
216
283
217
284
def interval_milliseconds(self):
218
285
"Return the 'interval' attribute in milliseconds"
219
return ((self.interval.days * 24 * 60 * 60 * 1000)
220
+ (self.interval.seconds * 1000)
221
+ (self.interval.microseconds // 1000))
286
return self._timedelta_to_milliseconds(self.interval)
287
288
def approval_delay_milliseconds(self):
289
return self._timedelta_to_milliseconds(self.approval_delay)
222
290
223
291
def __init__(self, name = None, disable_hook=None, config=None):
224
292
"""Note: the 'checker' key in 'config' sets the
231
299
# Uppercase and remove spaces from fingerprint for later
232
300
# comparison purposes with return value from the fingerprint()
233
301
# function
234
self.fingerprint = (config["fingerprint"].upper()
302
self.fingerprint = (config[u"fingerprint"].upper()
235
303
.replace(u" ", u""))
236
304
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:
305
if u"secret" in config:
306
self.secret = config[u"secret"].decode(u"base64")
307
elif u"secfile" in config:
308
with open(os.path.expanduser(os.path.expandvars
309
(config[u"secfile"])),
310
"rb") as secfile:
243
311
self.secret = secfile.read()
244
312
else:
245
313
raise TypeError(u"No secret or secfile for client %s"
246
314
% self.name)
247
self.host = config.get("host", "")
315
self.host = config.get(u"host", u"")
248
316
self.created = datetime.datetime.utcnow()
249
317
self.enabled = False
250
318
self.last_enabled = None
251
319
self.last_checked_ok = None
252
self.timeout = string_to_delta(config["timeout"])
253
self.interval = string_to_delta(config["interval"])
320
self.timeout = string_to_delta(config[u"timeout"])
321
self.interval = string_to_delta(config[u"interval"])
254
322
self.disable_hook = disable_hook
255
323
self.checker = None
256
324
self.checker_initiator_tag = None
257
325
self.disable_initiator_tag = None
258
326
self.checker_callback_tag = None
259
self.checker_command = config["checker"]
327
self.checker_command = config[u"checker"]
260
328
self.current_checker_command = None
261
329
self.last_connect = None
330
self._approved = None
331
self.approved_by_default = config.get(u"approved_by_default",
332
True)
333
self.approvals_pending = 0
334
self.approval_delay = string_to_delta(
335
config[u"approval_delay"])
336
self.approval_duration = string_to_delta(
337
config[u"approval_duration"])
338
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
262
339
340
def send_changedstate(self):
341
self.changedstate.acquire()
342
self.changedstate.notify_all()
343
self.changedstate.release()
344
263
345
def enable(self):
264
346
"""Start this client's checker and timeout hooks"""
347
if getattr(self, u"enabled", False):
348
# Already enabled
349
return
350
self.send_changedstate()
265
351
self.last_enabled = datetime.datetime.utcnow()
266
352
# Schedule a new checker to be started an 'interval' from now,
267
353
# and every interval from then on.
268
354
self.checker_initiator_tag = (gobject.timeout_add
269
355
(self.interval_milliseconds(),
270
356
self.start_checker))
271
# Also start a new checker *right now*.
272
self.start_checker()
273
357
# Schedule a disable() when 'timeout' has passed
274
358
self.disable_initiator_tag = (gobject.timeout_add
275
359
(self.timeout_milliseconds(),
276
360
self.disable))
277
361
self.enabled = True
362
# Also start a new checker *right now*.
363
self.start_checker()
278
364
279
def disable(self):
365
def disable(self, quiet=True):
280
366
"""Disable this client."""
281
367
if not getattr(self, "enabled", False):
282
368
return False
283
logger.info(u"Disabling client %s", self.name)
284
if getattr(self, "disable_initiator_tag", False):
369
if not quiet:
370
self.send_changedstate()
371
if not quiet:
372
logger.info(u"Disabling client %s", self.name)
373
if getattr(self, u"disable_initiator_tag", False):
285
374
gobject.source_remove(self.disable_initiator_tag)
286
375
self.disable_initiator_tag = None
287
if getattr(self, "checker_initiator_tag", False):
376
if getattr(self, u"checker_initiator_tag", False):
288
377
gobject.source_remove(self.checker_initiator_tag)
289
378
self.checker_initiator_tag = None
290
379
self.stop_checker()
317
406
318
407
def checked_ok(self):
319
408
"""Bump up the timeout for this client.
409
320
410
This should only be called when the client has been seen,
321
411
alive and well.
322
412
"""
328
418
329
419
def start_checker(self):
330
420
"""Start a new checker subprocess if one is not running.
421
331
422
If a checker already exists, leave it running and do
332
423
nothing."""
333
424
# The reason for not killing a running checker is that if we
336
427
# client would inevitably timeout, since no checker would get
337
428
# a chance to run to completion. If we instead leave running
338
429
# checkers alone, the checker would have to take more time
339
# than 'timeout' for the client to be declared invalid, which
340
# is as it should be.
430
# than 'timeout' for the client to be disabled, which is as it
431
# should be.
341
432
342
433
# If a checker exists, make sure it is not a zombie
343
if self.checker is not None:
434
try:
344
435
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
436
except (AttributeError, OSError), error:
437
if (isinstance(error, OSError)
438
and error.errno != errno.ECHILD):
439
raise error
440
else:
345
441
if pid:
346
logger.warning("Checker was a zombie")
442
logger.warning(u"Checker was a zombie")
347
443
gobject.source_remove(self.checker_callback_tag)
348
444
self.checker_callback(pid, status,
349
445
self.current_checker_command)
354
450
command = self.checker_command % self.host
355
451
except TypeError:
356
452
# Escape attributes for the shell
357
escaped_attrs = dict((key, re.escape(str(val)))
453
escaped_attrs = dict((key,
454
re.escape(unicode(str(val),
455
errors=
456
u'replace')))
358
457
for key, val in
359
458
vars(self).iteritems())
360
459
try:
373
472
# always replaced by /dev/null.)
374
473
self.checker = subprocess.Popen(command,
375
474
close_fds=True,
376
shell=True, cwd="/")
475
shell=True, cwd=u"/")
377
476
self.checker_callback_tag = (gobject.child_watch_add
378
477
(self.checker.pid,
379
478
self.checker_callback,
395
494
if self.checker_callback_tag:
396
495
gobject.source_remove(self.checker_callback_tag)
397
496
self.checker_callback_tag = None
398
if getattr(self, "checker", None) is None:
497
if getattr(self, u"checker", None) is None:
399
498
return
400
499
logger.debug(u"Stopping checker for %(name)s", vars(self))
401
500
try:
402
501
os.kill(self.checker.pid, signal.SIGTERM)
403
#os.sleep(0.5)
502
#time.sleep(0.5)
404
503
#if self.checker.poll() is None:
405
504
# os.kill(self.checker.pid, signal.SIGKILL)
406
505
except OSError, error:
407
506
if error.errno != errno.ESRCH: # No such process
408
507
raise
409
508
self.checker = None
410
411
def still_valid(self):
412
"""Has the timeout not yet passed for this client?"""
413
if not getattr(self, "enabled", False):
414
return False
415
now = datetime.datetime.utcnow()
416
if self.last_checked_ok is None:
417
return now < (self.created + self.timeout)
418
else:
419
return now < (self.last_checked_ok + self.timeout)
420
421
422
class ClientDBus(Client, dbus.service.Object):
509
510
def dbus_service_property(dbus_interface, signature=u"v",
511
access=u"readwrite", byte_arrays=False):
512
"""Decorators for marking methods of a DBusObjectWithProperties to
513
become properties on the D-Bus.
514
515
The decorated method will be called with no arguments by "Get"
516
and with one argument by "Set".
517
518
The parameters, where they are supported, are the same as
519
dbus.service.method, except there is only "signature", since the
520
type from Get() and the type sent to Set() is the same.
521
"""
522
# Encoding deeply encoded byte arrays is not supported yet by the
523
# "Set" method, so we fail early here:
524
if byte_arrays and signature != u"ay":
525
raise ValueError(u"Byte arrays not supported for non-'ay'"
526
u" signature %r" % signature)
527
def decorator(func):
528
func._dbus_is_property = True
529
func._dbus_interface = dbus_interface
530
func._dbus_signature = signature
531
func._dbus_access = access
532
func._dbus_name = func.__name__
533
if func._dbus_name.endswith(u"_dbus_property"):
534
func._dbus_name = func._dbus_name[:-14]
535
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
536
return func
537
return decorator
538
539
540
class DBusPropertyException(dbus.exceptions.DBusException):
541
"""A base class for D-Bus property-related exceptions
542
"""
543
def __unicode__(self):
544
return unicode(str(self))
545
546
547
class DBusPropertyAccessException(DBusPropertyException):
548
"""A property's access permissions disallows an operation.
549
"""
550
pass
551
552
553
class DBusPropertyNotFound(DBusPropertyException):
554
"""An attempt was made to access a non-existing property.
555
"""
556
pass
557
558
559
class DBusObjectWithProperties(dbus.service.Object):
560
"""A D-Bus object with properties.
561
562
Classes inheriting from this can use the dbus_service_property
563
decorator to expose methods as D-Bus properties. It exposes the
564
standard Get(), Set(), and GetAll() methods on the D-Bus.
565
"""
566
567
@staticmethod
568
def _is_dbus_property(obj):
569
return getattr(obj, u"_dbus_is_property", False)
570
571
def _get_all_dbus_properties(self):
572
"""Returns a generator of (name, attribute) pairs
573
"""
574
return ((prop._dbus_name, prop)
575
for name, prop in
576
inspect.getmembers(self, self._is_dbus_property))
577
578
def _get_dbus_property(self, interface_name, property_name):
579
"""Returns a bound method if one exists which is a D-Bus
580
property with the specified name and interface.
581
"""
582
for name in (property_name,
583
property_name + u"_dbus_property"):
584
prop = getattr(self, name, None)
585
if (prop is None
586
or not self._is_dbus_property(prop)
587
or prop._dbus_name != property_name
588
or (interface_name and prop._dbus_interface
589
and interface_name != prop._dbus_interface)):
590
continue
591
return prop
592
# No such property
593
raise DBusPropertyNotFound(self.dbus_object_path + u":"
594
+ interface_name + u"."
595
+ property_name)
596
597
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
598
out_signature=u"v")
599
def Get(self, interface_name, property_name):
600
"""Standard D-Bus property Get() method, see D-Bus standard.
601
"""
602
prop = self._get_dbus_property(interface_name, property_name)
603
if prop._dbus_access == u"write":
604
raise DBusPropertyAccessException(property_name)
605
value = prop()
606
if not hasattr(value, u"variant_level"):
607
return value
608
return type(value)(value, variant_level=value.variant_level+1)
609
610
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
611
def Set(self, interface_name, property_name, value):
612
"""Standard D-Bus property Set() method, see D-Bus standard.
613
"""
614
prop = self._get_dbus_property(interface_name, property_name)
615
if prop._dbus_access == u"read":
616
raise DBusPropertyAccessException(property_name)
617
if prop._dbus_get_args_options[u"byte_arrays"]:
618
# The byte_arrays option is not supported yet on
619
# signatures other than "ay".
620
if prop._dbus_signature != u"ay":
621
raise ValueError
622
value = dbus.ByteArray(''.join(unichr(byte)
623
for byte in value))
624
prop(value)
625
626
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
627
out_signature=u"a{sv}")
628
def GetAll(self, interface_name):
629
"""Standard D-Bus property GetAll() method, see D-Bus
630
standard.
631
632
Note: Will not include properties with access="write".
633
"""
634
all = {}
635
for name, prop in self._get_all_dbus_properties():
636
if (interface_name
637
and interface_name != prop._dbus_interface):
638
# Interface non-empty but did not match
639
continue
640
# Ignore write-only properties
641
if prop._dbus_access == u"write":
642
continue
643
value = prop()
644
if not hasattr(value, u"variant_level"):
645
all[name] = value
646
continue
647
all[name] = type(value)(value, variant_level=
648
value.variant_level+1)
649
return dbus.Dictionary(all, signature=u"sv")
650
651
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
652
out_signature=u"s",
653
path_keyword='object_path',
654
connection_keyword='connection')
655
def Introspect(self, object_path, connection):
656
"""Standard D-Bus method, overloaded to insert property tags.
657
"""
658
xmlstring = dbus.service.Object.Introspect(self, object_path,
659
connection)
660
try:
661
document = xml.dom.minidom.parseString(xmlstring)
662
def make_tag(document, name, prop):
663
e = document.createElement(u"property")
664
e.setAttribute(u"name", name)
665
e.setAttribute(u"type", prop._dbus_signature)
666
e.setAttribute(u"access", prop._dbus_access)
667
return e
668
for if_tag in document.getElementsByTagName(u"interface"):
669
for tag in (make_tag(document, name, prop)
670
for name, prop
671
in self._get_all_dbus_properties()
672
if prop._dbus_interface
673
== if_tag.getAttribute(u"name")):
674
if_tag.appendChild(tag)
675
# Add the names to the return values for the
676
# "org.freedesktop.DBus.Properties" methods
677
if (if_tag.getAttribute(u"name")
678
== u"org.freedesktop.DBus.Properties"):
679
for cn in if_tag.getElementsByTagName(u"method"):
680
if cn.getAttribute(u"name") == u"Get":
681
for arg in cn.getElementsByTagName(u"arg"):
682
if (arg.getAttribute(u"direction")
683
== u"out"):
684
arg.setAttribute(u"name", u"value")
685
elif cn.getAttribute(u"name") == u"GetAll":
686
for arg in cn.getElementsByTagName(u"arg"):
687
if (arg.getAttribute(u"direction")
688
== u"out"):
689
arg.setAttribute(u"name", u"props")
690
xmlstring = document.toxml(u"utf-8")
691
document.unlink()
692
except (AttributeError, xml.dom.DOMException,
693
xml.parsers.expat.ExpatError), error:
694
logger.error(u"Failed to override Introspection method",
695
error)
696
return xmlstring
697
698
699
class ClientDBus(Client, DBusObjectWithProperties):
423
700
"""A Client class using D-Bus
701
424
702
Attributes:
425
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
703
dbus_object_path: dbus.ObjectPath
704
bus: dbus.SystemBus()
426
705
"""
427
706
# dbus.service.Object doesn't use super(), so we can't either.
428
707
429
def __init__(self, *args, **kwargs):
708
def __init__(self, bus = None, *args, **kwargs):
709
self._approvals_pending = 0
710
self.bus = bus
430
711
Client.__init__(self, *args, **kwargs)
431
712
# Only now, when this client is initialized, can it show up on
432
713
# the D-Bus
433
714
self.dbus_object_path = (dbus.ObjectPath
434
("/clients/"
435
+ self.name.replace(".", "_")))
436
dbus.service.Object.__init__(self, bus,
437
self.dbus_object_path)
715
(u"/clients/"
716
+ self.name.replace(u".", u"_")))
717
DBusObjectWithProperties.__init__(self, self.bus,
718
self.dbus_object_path)
719
720
def _get_approvals_pending(self):
721
return self._approvals_pending
722
def _set_approvals_pending(self, value):
723
old_value = self._approvals_pending
724
self._approvals_pending = value
725
bval = bool(value)
726
if (hasattr(self, "dbus_object_path")
727
and bval is not bool(old_value)):
728
dbus_bool = dbus.Boolean(bval, variant_level=1)
729
self.PropertyChanged(dbus.String(u"ApprovalPending"),
730
dbus_bool)
731
732
approvals_pending = property(_get_approvals_pending,
733
_set_approvals_pending)
734
del _get_approvals_pending, _set_approvals_pending
735
736
@staticmethod
737
def _datetime_to_dbus(dt, variant_level=0):
738
"""Convert a UTC datetime.datetime() to a D-Bus type."""
739
return dbus.String(dt.isoformat(),
740
variant_level=variant_level)
741
438
742
def enable(self):
439
oldstate = getattr(self, "enabled", False)
743
oldstate = getattr(self, u"enabled", False)
440
744
r = Client.enable(self)
441
745
if oldstate != self.enabled:
442
746
# Emit D-Bus signals
443
self.PropertyChanged(dbus.String(u"enabled"),
747
self.PropertyChanged(dbus.String(u"Enabled"),
444
748
dbus.Boolean(True, variant_level=1))
445
self.PropertyChanged(dbus.String(u"last_enabled"),
446
(_datetime_to_dbus(self.last_enabled,
447
variant_level=1)))
749
self.PropertyChanged(
750
dbus.String(u"LastEnabled"),
751
self._datetime_to_dbus(self.last_enabled,
752
variant_level=1))
448
753
return r
449
754
450
def disable(self, signal = True):
451
oldstate = getattr(self, "enabled", False)
452
r = Client.disable(self)
453
if signal and oldstate != self.enabled:
755
def disable(self, quiet = False):
756
oldstate = getattr(self, u"enabled", False)
757
r = Client.disable(self, quiet=quiet)
758
if not quiet and oldstate != self.enabled:
454
759
# Emit D-Bus signal
455
self.PropertyChanged(dbus.String(u"enabled"),
760
self.PropertyChanged(dbus.String(u"Enabled"),
456
761
dbus.Boolean(False, variant_level=1))
457
762
return r
458
763
459
764
def __del__(self, *args, **kwargs):
460
765
try:
461
766
self.remove_from_connection()
462
except org.freedesktop.DBus.Python.LookupError:
767
except LookupError:
463
768
pass
464
dbus.service.Object.__del__(self, *args, **kwargs)
769
if hasattr(DBusObjectWithProperties, u"__del__"):
770
DBusObjectWithProperties.__del__(self, *args, **kwargs)
465
771
Client.__del__(self, *args, **kwargs)
466
772
467
773
def checker_callback(self, pid, condition, command,
469
775
self.checker_callback_tag = None
470
776
self.checker = None
471
777
# Emit D-Bus signal
472
self.PropertyChanged(dbus.String(u"checker_running"),
778
self.PropertyChanged(dbus.String(u"CheckerRunning"),
473
779
dbus.Boolean(False, variant_level=1))
474
780
if os.WIFEXITED(condition):
475
781
exitstatus = os.WEXITSTATUS(condition)
490
796
r = Client.checked_ok(self, *args, **kwargs)
491
797
# Emit D-Bus signal
492
798
self.PropertyChanged(
493
dbus.String(u"last_checked_ok"),
494
(_datetime_to_dbus(self.last_checked_ok,
495
variant_level=1)))
799
dbus.String(u"LastCheckedOK"),
800
(self._datetime_to_dbus(self.last_checked_ok,
801
variant_level=1)))
496
802
return r
497
803
498
804
def start_checker(self, *args, **kwargs):
502
808
else:
503
809
old_checker_pid = None
504
810
r = Client.start_checker(self, *args, **kwargs)
505
# Only emit D-Bus signal if new checker process was started
506
if ((self.checker is not None)
507
and not (old_checker is not None
508
and old_checker_pid == self.checker.pid)):
811
# Only if new checker process was started
812
if (self.checker is not None
813
and old_checker_pid != self.checker.pid):
814
# Emit D-Bus signal
509
815
self.CheckerStarted(self.current_checker_command)
510
816
self.PropertyChanged(
511
dbus.String("checker_running"),
817
dbus.String(u"CheckerRunning"),
512
818
dbus.Boolean(True, variant_level=1))
513
819
return r
514
820
515
821
def stop_checker(self, *args, **kwargs):
516
old_checker = getattr(self, "checker", None)
822
old_checker = getattr(self, u"checker", None)
517
823
r = Client.stop_checker(self, *args, **kwargs)
518
824
if (old_checker is not None
519
and getattr(self, "checker", None) is None):
520
self.PropertyChanged(dbus.String(u"checker_running"),
825
and getattr(self, u"checker", None) is None):
826
self.PropertyChanged(dbus.String(u"CheckerRunning"),
521
827
dbus.Boolean(False, variant_level=1))
522
828
return r
523
524
## D-Bus methods & signals
829
830
def _reset_approved(self):
831
self._approved = None
832
return False
833
834
def approve(self, value=True):
835
self.send_changedstate()
836
self._approved = value
837
gobject.timeout_add(self._timedelta_to_milliseconds
838
(self.approval_duration),
839
self._reset_approved)
840
841
842
## D-Bus methods, signals & properties
525
843
_interface = u"se.bsnet.fukt.Mandos.Client"
526
844
527
# CheckedOK - method
528
CheckedOK = dbus.service.method(_interface)(checked_ok)
529
CheckedOK.__name__ = "CheckedOK"
845
## Signals
530
846
531
847
# CheckerCompleted - signal
532
@dbus.service.signal(_interface, signature="nxs")
848
@dbus.service.signal(_interface, signature=u"nxs")
533
849
def CheckerCompleted(self, exitcode, waitstatus, command):
534
850
"D-Bus signal"
535
851
pass
536
852
537
853
# CheckerStarted - signal
538
@dbus.service.signal(_interface, signature="s")
854
@dbus.service.signal(_interface, signature=u"s")
539
855
def CheckerStarted(self, command):
540
856
"D-Bus signal"
541
857
pass
542
858
543
# GetAllProperties - method
544
@dbus.service.method(_interface, out_signature="a{sv}")
545
def GetAllProperties(self):
546
"D-Bus method"
547
return dbus.Dictionary({
548
dbus.String("name"):
549
dbus.String(self.name, variant_level=1),
550
dbus.String("fingerprint"):
551
dbus.String(self.fingerprint, variant_level=1),
552
dbus.String("host"):
553
dbus.String(self.host, variant_level=1),
554
dbus.String("created"):
555
_datetime_to_dbus(self.created, variant_level=1),
556
dbus.String("last_enabled"):
557
(_datetime_to_dbus(self.last_enabled,
558
variant_level=1)
559
if self.last_enabled is not None
560
else dbus.Boolean(False, variant_level=1)),
561
dbus.String("enabled"):
562
dbus.Boolean(self.enabled, variant_level=1),
563
dbus.String("last_checked_ok"):
564
(_datetime_to_dbus(self.last_checked_ok,
565
variant_level=1)
566
if self.last_checked_ok is not None
567
else dbus.Boolean (False, variant_level=1)),
568
dbus.String("timeout"):
569
dbus.UInt64(self.timeout_milliseconds(),
570
variant_level=1),
571
dbus.String("interval"):
572
dbus.UInt64(self.interval_milliseconds(),
573
variant_level=1),
574
dbus.String("checker"):
575
dbus.String(self.checker_command,
576
variant_level=1),
577
dbus.String("checker_running"):
578
dbus.Boolean(self.checker is not None,
579
variant_level=1),
580
dbus.String("object_path"):
581
dbus.ObjectPath(self.dbus_object_path,
582
variant_level=1)
583
}, signature="sv")
584
585
# IsStillValid - method
586
@dbus.service.method(_interface, out_signature="b")
587
def IsStillValid(self):
588
return self.still_valid()
589
590
859
# PropertyChanged - signal
591
@dbus.service.signal(_interface, signature="sv")
860
@dbus.service.signal(_interface, signature=u"sv")
592
861
def PropertyChanged(self, property, value):
593
862
"D-Bus signal"
594
863
pass
595
864
596
# ReceivedSecret - signal
865
# GotSecret - signal
597
866
@dbus.service.signal(_interface)
598
def ReceivedSecret(self):
599
"D-Bus signal"
867
def GotSecret(self):
868
"""D-Bus signal
869
Is sent after a successful transfer of secret from the Mandos
870
server to mandos-client
871
"""
600
872
pass
601
873
602
874
# Rejected - signal
603
@dbus.service.signal(_interface)
604
def Rejected(self):
605
"D-Bus signal"
606
pass
607
608
# SetChecker - method
609
@dbus.service.method(_interface, in_signature="s")
610
def SetChecker(self, checker):
611
"D-Bus setter method"
612
self.checker_command = checker
613
# Emit D-Bus signal
614
self.PropertyChanged(dbus.String(u"checker"),
615
dbus.String(self.checker_command,
616
variant_level=1))
617
618
# SetHost - method
619
@dbus.service.method(_interface, in_signature="s")
620
def SetHost(self, host):
621
"D-Bus setter method"
622
self.host = host
623
# Emit D-Bus signal
624
self.PropertyChanged(dbus.String(u"host"),
625
dbus.String(self.host, variant_level=1))
626
627
# SetInterval - method
628
@dbus.service.method(_interface, in_signature="t")
629
def SetInterval(self, milliseconds):
630
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
631
# Emit D-Bus signal
632
self.PropertyChanged(dbus.String(u"interval"),
633
(dbus.UInt64(self.interval_milliseconds(),
634
variant_level=1)))
635
636
# SetSecret - method
637
@dbus.service.method(_interface, in_signature="ay",
638
byte_arrays=True)
639
def SetSecret(self, secret):
640
"D-Bus setter method"
641
self.secret = str(secret)
642
643
# SetTimeout - method
644
@dbus.service.method(_interface, in_signature="t")
645
def SetTimeout(self, milliseconds):
646
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
647
# Emit D-Bus signal
648
self.PropertyChanged(dbus.String(u"timeout"),
649
(dbus.UInt64(self.timeout_milliseconds(),
650
variant_level=1)))
875
@dbus.service.signal(_interface, signature=u"s")
876
def Rejected(self, reason):
877
"D-Bus signal"
878
pass
879
880
# NeedApproval - signal
881
@dbus.service.signal(_interface, signature=u"tb")
882
def NeedApproval(self, timeout, default):
883
"D-Bus signal"
884
pass
885
886
## Methods
887
888
# Approve - method
889
@dbus.service.method(_interface, in_signature=u"b")
890
def Approve(self, value):
891
self.approve(value)
892
893
# CheckedOK - method
894
@dbus.service.method(_interface)
895
def CheckedOK(self):
896
return self.checked_ok()
651
897
652
898
# Enable - method
653
Enable = dbus.service.method(_interface)(enable)
654
Enable.__name__ = "Enable"
899
@dbus.service.method(_interface)
900
def Enable(self):
901
"D-Bus method"
902
self.enable()
655
903
656
904
# StartChecker - method
657
905
@dbus.service.method(_interface)
666
914
self.disable()
667
915
668
916
# StopChecker - method
669
StopChecker = dbus.service.method(_interface)(stop_checker)
670
StopChecker.__name__ = "StopChecker"
917
@dbus.service.method(_interface)
918
def StopChecker(self):
919
self.stop_checker()
920
921
## Properties
922
923
# ApprovalPending - property
924
@dbus_service_property(_interface, signature=u"b", access=u"read")
925
def ApprovalPending_dbus_property(self):
926
return dbus.Boolean(bool(self.approvals_pending))
927
928
# ApprovedByDefault - property
929
@dbus_service_property(_interface, signature=u"b",
930
access=u"readwrite")
931
def ApprovedByDefault_dbus_property(self, value=None):
932
if value is None: # get
933
return dbus.Boolean(self.approved_by_default)
934
self.approved_by_default = bool(value)
935
# Emit D-Bus signal
936
self.PropertyChanged(dbus.String(u"ApprovedByDefault"),
937
dbus.Boolean(value, variant_level=1))
938
939
# ApprovalDelay - property
940
@dbus_service_property(_interface, signature=u"t",
941
access=u"readwrite")
942
def ApprovalDelay_dbus_property(self, value=None):
943
if value is None: # get
944
return dbus.UInt64(self.approval_delay_milliseconds())
945
self.approval_delay = datetime.timedelta(0, 0, 0, value)
946
# Emit D-Bus signal
947
self.PropertyChanged(dbus.String(u"ApprovalDelay"),
948
dbus.UInt64(value, variant_level=1))
949
950
# ApprovalDuration - property
951
@dbus_service_property(_interface, signature=u"t",
952
access=u"readwrite")
953
def ApprovalDuration_dbus_property(self, value=None):
954
if value is None: # get
955
return dbus.UInt64(self._timedelta_to_milliseconds(
956
self.approval_duration))
957
self.approval_duration = datetime.timedelta(0, 0, 0, value)
958
# Emit D-Bus signal
959
self.PropertyChanged(dbus.String(u"ApprovalDuration"),
960
dbus.UInt64(value, variant_level=1))
961
962
# Name - property
963
@dbus_service_property(_interface, signature=u"s", access=u"read")
964
def Name_dbus_property(self):
965
return dbus.String(self.name)
966
967
# Fingerprint - property
968
@dbus_service_property(_interface, signature=u"s", access=u"read")
969
def Fingerprint_dbus_property(self):
970
return dbus.String(self.fingerprint)
971
972
# Host - property
973
@dbus_service_property(_interface, signature=u"s",
974
access=u"readwrite")
975
def Host_dbus_property(self, value=None):
976
if value is None: # get
977
return dbus.String(self.host)
978
self.host = value
979
# Emit D-Bus signal
980
self.PropertyChanged(dbus.String(u"Host"),
981
dbus.String(value, variant_level=1))
982
983
# Created - property
984
@dbus_service_property(_interface, signature=u"s", access=u"read")
985
def Created_dbus_property(self):
986
return dbus.String(self._datetime_to_dbus(self.created))
987
988
# LastEnabled - property
989
@dbus_service_property(_interface, signature=u"s", access=u"read")
990
def LastEnabled_dbus_property(self):
991
if self.last_enabled is None:
992
return dbus.String(u"")
993
return dbus.String(self._datetime_to_dbus(self.last_enabled))
994
995
# Enabled - property
996
@dbus_service_property(_interface, signature=u"b",
997
access=u"readwrite")
998
def Enabled_dbus_property(self, value=None):
999
if value is None: # get
1000
return dbus.Boolean(self.enabled)
1001
if value:
1002
self.enable()
1003
else:
1004
self.disable()
1005
1006
# LastCheckedOK - property
1007
@dbus_service_property(_interface, signature=u"s",
1008
access=u"readwrite")
1009
def LastCheckedOK_dbus_property(self, value=None):
1010
if value is not None:
1011
self.checked_ok()
1012
return
1013
if self.last_checked_ok is None:
1014
return dbus.String(u"")
1015
return dbus.String(self._datetime_to_dbus(self
1016
.last_checked_ok))
1017
1018
# Timeout - property
1019
@dbus_service_property(_interface, signature=u"t",
1020
access=u"readwrite")
1021
def Timeout_dbus_property(self, value=None):
1022
if value is None: # get
1023
return dbus.UInt64(self.timeout_milliseconds())
1024
self.timeout = datetime.timedelta(0, 0, 0, value)
1025
# Emit D-Bus signal
1026
self.PropertyChanged(dbus.String(u"Timeout"),
1027
dbus.UInt64(value, variant_level=1))
1028
if getattr(self, u"disable_initiator_tag", None) is None:
1029
return
1030
# Reschedule timeout
1031
gobject.source_remove(self.disable_initiator_tag)
1032
self.disable_initiator_tag = None
1033
time_to_die = (self.
1034
_timedelta_to_milliseconds((self
1035
.last_checked_ok
1036
+ self.timeout)
1037
- datetime.datetime
1038
.utcnow()))
1039
if time_to_die <= 0:
1040
# The timeout has passed
1041
self.disable()
1042
else:
1043
self.disable_initiator_tag = (gobject.timeout_add
1044
(time_to_die, self.disable))
1045
1046
# Interval - property
1047
@dbus_service_property(_interface, signature=u"t",
1048
access=u"readwrite")
1049
def Interval_dbus_property(self, value=None):
1050
if value is None: # get
1051
return dbus.UInt64(self.interval_milliseconds())
1052
self.interval = datetime.timedelta(0, 0, 0, value)
1053
# Emit D-Bus signal
1054
self.PropertyChanged(dbus.String(u"Interval"),
1055
dbus.UInt64(value, variant_level=1))
1056
if getattr(self, u"checker_initiator_tag", None) is None:
1057
return
1058
# Reschedule checker run
1059
gobject.source_remove(self.checker_initiator_tag)
1060
self.checker_initiator_tag = (gobject.timeout_add
1061
(value, self.start_checker))
1062
self.start_checker() # Start one now, too
1063
1064
# Checker - property
1065
@dbus_service_property(_interface, signature=u"s",
1066
access=u"readwrite")
1067
def Checker_dbus_property(self, value=None):
1068
if value is None: # get
1069
return dbus.String(self.checker_command)
1070
self.checker_command = value
1071
# Emit D-Bus signal
1072
self.PropertyChanged(dbus.String(u"Checker"),
1073
dbus.String(self.checker_command,
1074
variant_level=1))
1075
1076
# CheckerRunning - property
1077
@dbus_service_property(_interface, signature=u"b",
1078
access=u"readwrite")
1079
def CheckerRunning_dbus_property(self, value=None):
1080
if value is None: # get
1081
return dbus.Boolean(self.checker is not None)
1082
if value:
1083
self.start_checker()
1084
else:
1085
self.stop_checker()
1086
1087
# ObjectPath - property
1088
@dbus_service_property(_interface, signature=u"o", access=u"read")
1089
def ObjectPath_dbus_property(self):
1090
return self.dbus_object_path # is already a dbus.ObjectPath
1091
1092
# Secret = property
1093
@dbus_service_property(_interface, signature=u"ay",
1094
access=u"write", byte_arrays=True)
1095
def Secret_dbus_property(self, value):
1096
self.secret = str(value)
671
1097
672
1098
del _interface
673
1099
674
1100
675
def peer_certificate(session):
676
"Return the peer's OpenPGP certificate as a bytestring"
677
# If not an OpenPGP certificate...
678
if (gnutls.library.functions
679
.gnutls_certificate_type_get(session._c_object)
680
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
681
# ...do the normal thing
682
return session.peer_certificate
683
list_size = ctypes.c_uint(1)
684
cert_list = (gnutls.library.functions
685
.gnutls_certificate_get_peers
686
(session._c_object, ctypes.byref(list_size)))
687
if not bool(cert_list) and list_size.value != 0:
688
raise gnutls.errors.GNUTLSError("error getting peer"
689
" certificate")
690
if list_size.value == 0:
691
return None
692
cert = cert_list[0]
693
return ctypes.string_at(cert.data, cert.size)
694
695
696
def fingerprint(openpgp):
697
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
698
# New GnuTLS "datum" with the OpenPGP public key
699
datum = (gnutls.library.types
700
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
701
ctypes.POINTER
702
(ctypes.c_ubyte)),
703
ctypes.c_uint(len(openpgp))))
704
# New empty GnuTLS certificate
705
crt = gnutls.library.types.gnutls_openpgp_crt_t()
706
(gnutls.library.functions
707
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
708
# Import the OpenPGP public key into the certificate
709
(gnutls.library.functions
710
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
711
gnutls.library.constants
712
.GNUTLS_OPENPGP_FMT_RAW))
713
# Verify the self signature in the key
714
crtverify = ctypes.c_uint()
715
(gnutls.library.functions
716
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
717
if crtverify.value != 0:
718
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
719
raise gnutls.errors.CertificateSecurityError("Verify failed")
720
# New buffer for the fingerprint
721
buf = ctypes.create_string_buffer(20)
722
buf_len = ctypes.c_size_t()
723
# Get the fingerprint from the certificate into the buffer
724
(gnutls.library.functions
725
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
726
ctypes.byref(buf_len)))
727
# Deinit the certificate
728
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
729
# Convert the buffer to a Python bytestring
730
fpr = ctypes.string_at(buf, buf_len.value)
731
# Convert the bytestring to hexadecimal notation
732
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
733
return hex_fpr
734
735
736
class TCP_handler(SocketServer.BaseRequestHandler, object):
737
"""A TCP request handler class.
738
Instantiated by IPv6_TCPServer for each request to handle it.
1101
class ProxyClient(object):
1102
def __init__(self, child_pipe, fpr, address):
1103
self._pipe = child_pipe
1104
self._pipe.send(('init', fpr, address))
1105
if not self._pipe.recv():
1106
raise KeyError()
1107
1108
def __getattribute__(self, name):
1109
if(name == '_pipe'):
1110
return super(ProxyClient, self).__getattribute__(name)
1111
self._pipe.send(('getattr', name))
1112
data = self._pipe.recv()
1113
if data[0] == 'data':
1114
return data[1]
1115
if data[0] == 'function':
1116
def func(*args, **kwargs):
1117
self._pipe.send(('funcall', name, args, kwargs))
1118
return self._pipe.recv()[1]
1119
return func
1120
1121
def __setattr__(self, name, value):
1122
if(name == '_pipe'):
1123
return super(ProxyClient, self).__setattr__(name, value)
1124
self._pipe.send(('setattr', name, value))
1125
1126
1127
class ClientHandler(socketserver.BaseRequestHandler, object):
1128
"""A class to handle client connections.
1129
1130
Instantiated once for each connection to handle it.
739
1131
Note: This will run in its own forked process."""
740
1132
741
1133
def handle(self):
742
logger.info(u"TCP connection from: %s",
743
unicode(self.client_address))
744
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
745
# Open IPC pipe to parent process
746
with closing(os.fdopen(self.server.pipe[1], "w", 1)) as ipc:
1134
with contextlib.closing(self.server.child_pipe) as child_pipe:
1135
logger.info(u"TCP connection from: %s",
1136
unicode(self.client_address))
1137
logger.debug(u"Pipe FD: %d",
1138
self.server.child_pipe.fileno())
1139
747
1140
session = (gnutls.connection
748
1141
.ClientSession(self.request,
749
1142
gnutls.connection
750
1143
.X509Credentials()))
751
752
line = self.request.makefile().readline()
753
logger.debug(u"Protocol version: %r", line)
754
try:
755
if int(line.strip().split()[0]) > 1:
756
raise RuntimeError
757
except (ValueError, IndexError, RuntimeError), error:
758
logger.error(u"Unknown protocol version: %s", error)
759
return
760
1144
761
1145
# Note: gnutls.connection.X509Credentials is really a
762
1146
# generic GnuTLS certificate credentials object so long as
763
1147
# no X.509 keys are added to it. Therefore, we can use it
764
1148
# here despite using OpenPGP certificates.
765
766
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
767
# "+AES-256-CBC", "+SHA1",
768
# "+COMP-NULL", "+CTYPE-OPENPGP",
769
# "+DHE-DSS"))
1149
1150
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1151
# u"+AES-256-CBC", u"+SHA1",
1152
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1153
# u"+DHE-DSS"))
770
1154
# Use a fallback default, since this MUST be set.
771
priority = self.server.settings.get("priority", "NORMAL")
1155
priority = self.server.gnutls_priority
1156
if priority is None:
1157
priority = u"NORMAL"
772
1158
(gnutls.library.functions
773
1159
.gnutls_priority_set_direct(session._c_object,
774
1160
priority, None))
775
1161
1162
# Start communication using the Mandos protocol
1163
# Get protocol number
1164
line = self.request.makefile().readline()
1165
logger.debug(u"Protocol version: %r", line)
1166
try:
1167
if int(line.strip().split()[0]) > 1:
1168
raise RuntimeError
1169
except (ValueError, IndexError, RuntimeError), error:
1170
logger.error(u"Unknown protocol version: %s", error)
1171
return
1172
1173
# Start GnuTLS connection
776
1174
try:
777
1175
session.handshake()
778
1176
except gnutls.errors.GNUTLSError, error:
781
1179
# established. Just abandon the request.
782
1180
return
783
1181
logger.debug(u"Handshake succeeded")
1182
1183
approval_required = False
784
1184
try:
785
fpr = fingerprint(peer_certificate(session))
786
except (TypeError, gnutls.errors.GNUTLSError), error:
787
logger.warning(u"Bad certificate: %s", error)
788
session.bye()
789
return
790
logger.debug(u"Fingerprint: %s", fpr)
791
792
for c in self.server.clients:
793
if c.fingerprint == fpr:
794
client = c
795
break
796
else:
797
logger.warning(u"Client not found for fingerprint: %s",
798
fpr)
799
ipc.write("NOTFOUND %s\n" % fpr)
800
session.bye()
801
return
802
# Have to check if client.still_valid(), since it is
803
# possible that the client timed out while establishing
804
# the GnuTLS session.
805
if not client.still_valid():
806
logger.warning(u"Client %(name)s is invalid",
807
vars(client))
808
ipc.write("INVALID %s\n" % client.name)
809
session.bye()
810
return
811
ipc.write("SENDING %s\n" % client.name)
812
sent_size = 0
813
while sent_size < len(client.secret):
814
sent = session.send(client.secret[sent_size:])
815
logger.debug(u"Sent: %d, remaining: %d",
816
sent, len(client.secret)
817
- (sent_size + sent))
818
sent_size += sent
819
session.bye()
820
821
822
class ForkingMixInWithPipe(SocketServer.ForkingMixIn, object):
823
"""Like SocketServer.ForkingMixIn, but also pass a pipe.
824
Assumes a gobject.MainLoop event loop.
825
"""
1185
try:
1186
fpr = self.fingerprint(self.peer_certificate
1187
(session))
1188
except (TypeError, gnutls.errors.GNUTLSError), error:
1189
logger.warning(u"Bad certificate: %s", error)
1190
return
1191
logger.debug(u"Fingerprint: %s", fpr)
1192
1193
try:
1194
client = ProxyClient(child_pipe, fpr,
1195
self.client_address)
1196
except KeyError:
1197
return
1198
1199
if client.approval_delay:
1200
delay = client.approval_delay
1201
client.approvals_pending += 1
1202
approval_required = True
1203
1204
while True:
1205
if not client.enabled:
1206
logger.warning(u"Client %s is disabled",
1207
client.name)
1208
if self.server.use_dbus:
1209
# Emit D-Bus signal
1210
client.Rejected("Disabled")
1211
return
1212
1213
if client._approved or not client.approval_delay:
1214
#We are approved or approval is disabled
1215
break
1216
elif client._approved is None:
1217
logger.info(u"Client %s needs approval",
1218
client.name)
1219
if self.server.use_dbus:
1220
# Emit D-Bus signal
1221
client.NeedApproval(
1222
client.approval_delay_milliseconds(),
1223
client.approved_by_default)
1224
else:
1225
logger.warning(u"Client %s was not approved",
1226
client.name)
1227
if self.server.use_dbus:
1228
# Emit D-Bus signal
1229
client.Rejected("Denied")
1230
return
1231
1232
#wait until timeout or approved
1233
#x = float(client._timedelta_to_milliseconds(delay))
1234
time = datetime.datetime.now()
1235
client.changedstate.acquire()
1236
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1237
client.changedstate.release()
1238
time2 = datetime.datetime.now()
1239
if (time2 - time) >= delay:
1240
if not client.approved_by_default:
1241
logger.warning("Client %s timed out while"
1242
" waiting for approval",
1243
client.name)
1244
if self.server.use_dbus:
1245
# Emit D-Bus signal
1246
client.Rejected("Timed out")
1247
return
1248
else:
1249
break
1250
else:
1251
delay -= time2 - time
1252
1253
sent_size = 0
1254
while sent_size < len(client.secret):
1255
try:
1256
sent = session.send(client.secret[sent_size:])
1257
except (gnutls.errors.GNUTLSError), error:
1258
logger.warning("gnutls send failed")
1259
return
1260
logger.debug(u"Sent: %d, remaining: %d",
1261
sent, len(client.secret)
1262
- (sent_size + sent))
1263
sent_size += sent
1264
1265
logger.info(u"Sending secret to %s", client.name)
1266
# bump the timeout as if seen
1267
client.checked_ok()
1268
if self.server.use_dbus:
1269
# Emit D-Bus signal
1270
client.GotSecret()
1271
1272
finally:
1273
if approval_required:
1274
client.approvals_pending -= 1
1275
try:
1276
session.bye()
1277
except (gnutls.errors.GNUTLSError), error:
1278
logger.warning("GnuTLS bye failed")
1279
1280
@staticmethod
1281
def peer_certificate(session):
1282
"Return the peer's OpenPGP certificate as a bytestring"
1283
# If not an OpenPGP certificate...
1284
if (gnutls.library.functions
1285
.gnutls_certificate_type_get(session._c_object)
1286
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1287
# ...do the normal thing
1288
return session.peer_certificate
1289
list_size = ctypes.c_uint(1)
1290
cert_list = (gnutls.library.functions
1291
.gnutls_certificate_get_peers
1292
(session._c_object, ctypes.byref(list_size)))
1293
if not bool(cert_list) and list_size.value != 0:
1294
raise gnutls.errors.GNUTLSError(u"error getting peer"
1295
u" certificate")
1296
if list_size.value == 0:
1297
return None
1298
cert = cert_list[0]
1299
return ctypes.string_at(cert.data, cert.size)
1300
1301
@staticmethod
1302
def fingerprint(openpgp):
1303
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1304
# New GnuTLS "datum" with the OpenPGP public key
1305
datum = (gnutls.library.types
1306
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1307
ctypes.POINTER
1308
(ctypes.c_ubyte)),
1309
ctypes.c_uint(len(openpgp))))
1310
# New empty GnuTLS certificate
1311
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1312
(gnutls.library.functions
1313
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1314
# Import the OpenPGP public key into the certificate
1315
(gnutls.library.functions
1316
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1317
gnutls.library.constants
1318
.GNUTLS_OPENPGP_FMT_RAW))
1319
# Verify the self signature in the key
1320
crtverify = ctypes.c_uint()
1321
(gnutls.library.functions
1322
.gnutls_openpgp_crt_verify_self(crt, 0,
1323
ctypes.byref(crtverify)))
1324
if crtverify.value != 0:
1325
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1326
raise (gnutls.errors.CertificateSecurityError
1327
(u"Verify failed"))
1328
# New buffer for the fingerprint
1329
buf = ctypes.create_string_buffer(20)
1330
buf_len = ctypes.c_size_t()
1331
# Get the fingerprint from the certificate into the buffer
1332
(gnutls.library.functions
1333
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1334
ctypes.byref(buf_len)))
1335
# Deinit the certificate
1336
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1337
# Convert the buffer to a Python bytestring
1338
fpr = ctypes.string_at(buf, buf_len.value)
1339
# Convert the bytestring to hexadecimal notation
1340
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1341
return hex_fpr
1342
1343
1344
class MultiprocessingMixIn(object):
1345
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1346
def sub_process_main(self, request, address):
1347
try:
1348
self.finish_request(request, address)
1349
except:
1350
self.handle_error(request, address)
1351
self.close_request(request)
1352
1353
def process_request(self, request, address):
1354
"""Start a new process to process the request."""
1355
multiprocessing.Process(target = self.sub_process_main,
1356
args = (request, address)).start()
1357
1358
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1359
""" adds a pipe to the MixIn """
826
1360
def process_request(self, request, client_address):
827
"""This overrides and wraps the original process_request().
828
This function creates a new pipe in self.pipe
1361
"""Overrides and wraps the original process_request().
1362
1363
This function creates a new pipe in self.pipe
829
1364
"""
830
self.pipe = os.pipe()
831
super(ForkingMixInWithPipe,
1365
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1366
1367
super(MultiprocessingMixInWithPipe,
832
1368
self).process_request(request, client_address)
833
os.close(self.pipe[1]) # close write end
834
# Call "handle_ipc" for both data and EOF events
835
gobject.io_add_watch(self.pipe[0],
836
gobject.IO_IN | gobject.IO_HUP,
837
self.handle_ipc)
838
def handle_ipc(source, condition):
1369
self.child_pipe.close()
1370
self.add_pipe(parent_pipe)
1371
1372
def add_pipe(self, parent_pipe):
839
1373
"""Dummy function; override as necessary"""
840
os.close(source)
841
return False
842
843
844
class IPv6_TCPServer(ForkingMixInWithPipe,
845
SocketServer.TCPServer, object):
1374
pass
1375
1376
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1377
socketserver.TCPServer, object):
846
1378
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1379
847
1380
Attributes:
848
settings: Server settings
849
clients: Set() of Client objects
850
1381
enabled: Boolean; whether this server is activated yet
1382
interface: None or a network interface name (string)
1383
use_ipv6: Boolean; to use IPv6 or not
851
1384
"""
852
address_family = socket.AF_INET6
853
def __init__(self, *args, **kwargs):
854
if "settings" in kwargs:
855
self.settings = kwargs["settings"]
856
del kwargs["settings"]
857
if "clients" in kwargs:
858
self.clients = kwargs["clients"]
859
del kwargs["clients"]
860
if "use_ipv6" in kwargs:
861
if not kwargs["use_ipv6"]:
862
self.address_family = socket.AF_INET
863
del kwargs["use_ipv6"]
864
self.enabled = False
865
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1385
def __init__(self, server_address, RequestHandlerClass,
1386
interface=None, use_ipv6=True):
1387
self.interface = interface
1388
if use_ipv6:
1389
self.address_family = socket.AF_INET6
1390
socketserver.TCPServer.__init__(self, server_address,
1391
RequestHandlerClass)
866
1392
def server_bind(self):
867
1393
"""This overrides the normal server_bind() function
868
1394
to bind to an interface if one was specified, and also NOT to
869
1395
bind to an address or port if they were not specified."""
870
if self.settings["interface"]:
871
# 25 is from /usr/include/asm-i486/socket.h
872
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
873
try:
874
self.socket.setsockopt(socket.SOL_SOCKET,
875
SO_BINDTODEVICE,
876
self.settings["interface"])
877
except socket.error, error:
878
if error[0] == errno.EPERM:
879
logger.error(u"No permission to"
880
u" bind to interface %s",
881
self.settings["interface"])
882
else:
883
raise
1396
if self.interface is not None:
1397
if SO_BINDTODEVICE is None:
1398
logger.error(u"SO_BINDTODEVICE does not exist;"
1399
u" cannot bind to interface %s",
1400
self.interface)
1401
else:
1402
try:
1403
self.socket.setsockopt(socket.SOL_SOCKET,
1404
SO_BINDTODEVICE,
1405
str(self.interface
1406
+ u'\0'))
1407
except socket.error, error:
1408
if error[0] == errno.EPERM:
1409
logger.error(u"No permission to"
1410
u" bind to interface %s",
1411
self.interface)
1412
elif error[0] == errno.ENOPROTOOPT:
1413
logger.error(u"SO_BINDTODEVICE not available;"
1414
u" cannot bind to interface %s",
1415
self.interface)
1416
else:
1417
raise
884
1418
# Only bind(2) the socket if we really need to.
885
1419
if self.server_address[0] or self.server_address[1]:
886
1420
if not self.server_address[0]:
887
1421
if self.address_family == socket.AF_INET6:
888
any_address = "::" # in6addr_any
1422
any_address = u"::" # in6addr_any
889
1423
else:
890
1424
any_address = socket.INADDR_ANY
891
1425
self.server_address = (any_address,
893
1427
elif not self.server_address[1]:
894
1428
self.server_address = (self.server_address[0],
895
1429
0)
896
# if self.settings["interface"]:
1430
# if self.interface:
897
1431
# self.server_address = (self.server_address[0],
898
1432
# 0, # port
899
1433
# 0, # flowinfo
900
1434
# if_nametoindex
901
# (self.settings
902
# ["interface"]))
903
return super(IPv6_TCPServer, self).server_bind()
1435
# (self.interface))
1436
return socketserver.TCPServer.server_bind(self)
1437
1438
1439
class MandosServer(IPv6_TCPServer):
1440
"""Mandos server.
1441
1442
Attributes:
1443
clients: set of Client objects
1444
gnutls_priority GnuTLS priority string
1445
use_dbus: Boolean; to emit D-Bus signals or not
1446
1447
Assumes a gobject.MainLoop event loop.
1448
"""
1449
def __init__(self, server_address, RequestHandlerClass,
1450
interface=None, use_ipv6=True, clients=None,
1451
gnutls_priority=None, use_dbus=True):
1452
self.enabled = False
1453
self.clients = clients
1454
if self.clients is None:
1455
self.clients = set()
1456
self.use_dbus = use_dbus
1457
self.gnutls_priority = gnutls_priority
1458
IPv6_TCPServer.__init__(self, server_address,
1459
RequestHandlerClass,
1460
interface = interface,
1461
use_ipv6 = use_ipv6)
904
1462
def server_activate(self):
905
1463
if self.enabled:
906
return super(IPv6_TCPServer, self).server_activate()
1464
return socketserver.TCPServer.server_activate(self)
907
1465
def enable(self):
908
1466
self.enabled = True
909
def handle_ipc(self, source, condition, file_objects={}):
1467
def add_pipe(self, parent_pipe):
1468
# Call "handle_ipc" for both data and EOF events
1469
gobject.io_add_watch(parent_pipe.fileno(),
1470
gobject.IO_IN | gobject.IO_HUP,
1471
functools.partial(self.handle_ipc,
1472
parent_pipe = parent_pipe))
1473
1474
def handle_ipc(self, source, condition, parent_pipe=None,
1475
client_object=None):
910
1476
condition_names = {
911
gobject.IO_IN: "IN", # There is data to read.
912
gobject.IO_OUT: "OUT", # Data can be written (without
913
# blocking).
914
gobject.IO_PRI: "PRI", # There is urgent data to read.
915
gobject.IO_ERR: "ERR", # Error condition.
916
gobject.IO_HUP: "HUP" # Hung up (the connection has been
917
# broken, usually for pipes and
918
# sockets).
1477
gobject.IO_IN: u"IN", # There is data to read.
1478
gobject.IO_OUT: u"OUT", # Data can be written (without
1479
# blocking).
1480
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1481
gobject.IO_ERR: u"ERR", # Error condition.
1482
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1483
# broken, usually for pipes and
1484
# sockets).
919
1485
}
920
1486
conditions_string = ' | '.join(name
921
1487
for cond, name in
922
1488
condition_names.iteritems()
923
1489
if cond & condition)
924
logger.debug("Handling IPC: FD = %d, condition = %s", source,
1490
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
925
1491
conditions_string)
926
927
# Turn the pipe file descriptor into a Python file object
928
if source not in file_objects:
929
file_objects[source] = os.fdopen(source, "r", 1)
930
931
# Read a line from the file object
932
cmdline = file_objects[source].readline()
933
if not cmdline: # Empty line means end of file
934
# close the IPC pipe
935
file_objects[source].close()
936
del file_objects[source]
1492
1493
# error or the other end of multiprocessing.Pipe has closed
1494
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1495
return False
1496
1497
# Read a request from the child
1498
request = parent_pipe.recv()
1499
logger.debug(u"IPC request: %s", repr(request))
1500
command = request[0]
1501
1502
if command == 'init':
1503
fpr = request[1]
1504
address = request[2]
937
1505
938
# Stop calling this function
939
return False
940
941
logger.debug("IPC command: %r\n" % cmdline)
942
943
# Parse and act on command
944
cmd, args = cmdline.split(None, 1)
945
if cmd == "NOTFOUND":
946
if self.settings["use_dbus"]:
947
# Emit D-Bus signal
948
mandos_dbus_service.ClientNotFound(args)
949
elif cmd == "INVALID":
950
if self.settings["use_dbus"]:
951
for client in self.clients:
952
if client.name == args:
953
# Emit D-Bus signal
954
client.Rejected()
955
break
956
elif cmd == "SENDING":
957
for client in self.clients:
958
if client.name == args:
959
client.checked_ok()
960
if self.settings["use_dbus"]:
961
# Emit D-Bus signal
962
client.ReceivedSecret()
1506
for c in self.clients:
1507
if c.fingerprint == fpr:
1508
client = c
963
1509
break
964
else:
965
logger.error("Unknown IPC command: %r", cmdline)
1510
else:
1511
logger.warning(u"Client not found for fingerprint: %s, ad"
1512
u"dress: %s", fpr, address)
1513
if self.use_dbus:
1514
# Emit D-Bus signal
1515
mandos_dbus_service.ClientNotFound(fpr, address)
1516
parent_pipe.send(False)
1517
return False
1518
1519
gobject.io_add_watch(parent_pipe.fileno(),
1520
gobject.IO_IN | gobject.IO_HUP,
1521
functools.partial(self.handle_ipc,
1522
parent_pipe = parent_pipe,
1523
client_object = client))
1524
parent_pipe.send(True)
1525
# remove the old hook in favor of the new above hook on same fileno
1526
return False
1527
if command == 'funcall':
1528
funcname = request[1]
1529
args = request[2]
1530
kwargs = request[3]
1531
1532
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1533
1534
if command == 'getattr':
1535
attrname = request[1]
1536
if callable(client_object.__getattribute__(attrname)):
1537
parent_pipe.send(('function',))
1538
else:
1539
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
966
1540
967
# Keep calling this function
1541
if command == 'setattr':
1542
attrname = request[1]
1543
value = request[2]
1544
setattr(client_object, attrname, value)
1545
968
1546
return True
969
1547
970
1548
971
1549
def string_to_delta(interval):
972
1550
"""Parse a string and return a datetime.timedelta
973
1551
974
>>> string_to_delta('7d')
1552
>>> string_to_delta(u'7d')
975
1553
datetime.timedelta(7)
976
>>> string_to_delta('60s')
1554
>>> string_to_delta(u'60s')
977
1555
datetime.timedelta(0, 60)
978
>>> string_to_delta('60m')
1556
>>> string_to_delta(u'60m')
979
1557
datetime.timedelta(0, 3600)
980
>>> string_to_delta('24h')
1558
>>> string_to_delta(u'24h')
981
1559
datetime.timedelta(1)
982
1560
>>> string_to_delta(u'1w')
983
1561
datetime.timedelta(7)
984
>>> string_to_delta('5m 30s')
1562
>>> string_to_delta(u'5m 30s')
985
1563
datetime.timedelta(0, 330)
986
1564
"""
987
1565
timevalue = datetime.timedelta(0)
1000
1578
elif suffix == u"w":
1001
1579
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1002
1580
else:
1003
raise ValueError
1004
except (ValueError, IndexError):
1005
raise ValueError
1581
raise ValueError(u"Unknown suffix %r" % suffix)
1582
except (ValueError, IndexError), e:
1583
raise ValueError(e.message)
1006
1584
timevalue += delta
1007
1585
return timevalue
1008
1586
1009
1587
1010
def server_state_changed(state):
1011
"""Derived from the Avahi example code"""
1012
if state == avahi.SERVER_COLLISION:
1013
logger.error(u"Zeroconf server name collision")
1014
service.remove()
1015
elif state == avahi.SERVER_RUNNING:
1016
service.add()
1017
1018
1019
def entry_group_state_changed(state, error):
1020
"""Derived from the Avahi example code"""
1021
logger.debug(u"Avahi state change: %i", state)
1022
1023
if state == avahi.ENTRY_GROUP_ESTABLISHED:
1024
logger.debug(u"Zeroconf service established.")
1025
elif state == avahi.ENTRY_GROUP_COLLISION:
1026
logger.warning(u"Zeroconf service name collision.")
1027
service.rename()
1028
elif state == avahi.ENTRY_GROUP_FAILURE:
1029
logger.critical(u"Avahi: Error in group state changed %s",
1030
unicode(error))
1031
raise AvahiGroupError(u"State changed: %s" % unicode(error))
1032
1033
1588
def if_nametoindex(interface):
1034
"""Call the C function if_nametoindex(), or equivalent"""
1589
"""Call the C function if_nametoindex(), or equivalent
1590
1591
Note: This function cannot accept a unicode string."""
1035
1592
global if_nametoindex
1036
1593
try:
1037
1594
if_nametoindex = (ctypes.cdll.LoadLibrary
1038
(ctypes.util.find_library("c"))
1595
(ctypes.util.find_library(u"c"))
1039
1596
.if_nametoindex)
1040
1597
except (OSError, AttributeError):
1041
if "struct" not in sys.modules:
1042
import struct
1043
if "fcntl" not in sys.modules:
1044
import fcntl
1598
logger.warning(u"Doing if_nametoindex the hard way")
1045
1599
def if_nametoindex(interface):
1046
1600
"Get an interface index the hard way, i.e. using fcntl()"
1047
1601
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1048
with closing(socket.socket()) as s:
1602
with contextlib.closing(socket.socket()) as s:
1049
1603
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1050
struct.pack("16s16x", interface))
1051
interface_index = struct.unpack("I", ifreq[16:20])[0]
1604
struct.pack(str(u"16s16x"),
1605
interface))
1606
interface_index = struct.unpack(str(u"I"),
1607
ifreq[16:20])[0]
1052
1608
return interface_index
1053
1609
return if_nametoindex(interface)
1054
1610
1055
1611
1056
1612
def daemon(nochdir = False, noclose = False):
1057
1613
"""See daemon(3). Standard BSD Unix function.
1614
1058
1615
This should really exist as os.daemon, but it doesn't (yet)."""
1059
1616
if os.fork():
1060
1617
sys.exit()
1061
1618
os.setsid()
1062
1619
if not nochdir:
1063
os.chdir("/")
1620
os.chdir(u"/")
1064
1621
if os.fork():
1065
1622
sys.exit()
1066
1623
if not noclose:
1068
1625
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1069
1626
if not stat.S_ISCHR(os.fstat(null).st_mode):
1070
1627
raise OSError(errno.ENODEV,
1071
"/dev/null not a character device")
1628
u"%s not a character device"
1629
% os.path.devnull)
1072
1630
os.dup2(null, sys.stdin.fileno())
1073
1631
os.dup2(null, sys.stdout.fileno())
1074
1632
os.dup2(null, sys.stderr.fileno())
1078
1636
1079
1637
def main():
1080
1638
1081
######################################################################
1639
##################################################################
1082
1640
# Parsing of options, both command line and config file
1083
1641
1084
1642
parser = optparse.OptionParser(version = "%%prog %s" % version)
1085
parser.add_option("-i", "--interface", type="string",
1086
metavar="IF", help="Bind to interface IF")
1087
parser.add_option("-a", "--address", type="string",
1088
help="Address to listen for requests on")
1089
parser.add_option("-p", "--port", type="int",
1090
help="Port number to receive requests on")
1091
parser.add_option("--check", action="store_true",
1092
help="Run self-test")
1093
parser.add_option("--debug", action="store_true",
1094
help="Debug mode; run in foreground and log to"
1095
" terminal")
1096
parser.add_option("--priority", type="string", help="GnuTLS"
1097
" priority string (see GnuTLS documentation)")
1098
parser.add_option("--servicename", type="string", metavar="NAME",
1099
help="Zeroconf service name")
1100
parser.add_option("--configdir", type="string",
1101
default="/etc/mandos", metavar="DIR",
1102
help="Directory to search for configuration"
1103
" files")
1104
parser.add_option("--no-dbus", action="store_false",
1105
dest="use_dbus",
1106
help="Do not provide D-Bus system bus"
1107
" interface")
1108
parser.add_option("--no-ipv6", action="store_false",
1109
dest="use_ipv6", help="Do not use IPv6")
1643
parser.add_option("-i", u"--interface", type=u"string",
1644
metavar="IF", help=u"Bind to interface IF")
1645
parser.add_option("-a", u"--address", type=u"string",
1646
help=u"Address to listen for requests on")
1647
parser.add_option("-p", u"--port", type=u"int",
1648
help=u"Port number to receive requests on")
1649
parser.add_option("--check", action=u"store_true",
1650
help=u"Run self-test")
1651
parser.add_option("--debug", action=u"store_true",
1652
help=u"Debug mode; run in foreground and log to"
1653
u" terminal")
1654
parser.add_option("--debuglevel", type=u"string", metavar="Level",
1655
help=u"Debug level for stdout output")
1656
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1657
u" priority string (see GnuTLS documentation)")
1658
parser.add_option("--servicename", type=u"string",
1659
metavar=u"NAME", help=u"Zeroconf service name")
1660
parser.add_option("--configdir", type=u"string",
1661
default=u"/etc/mandos", metavar=u"DIR",
1662
help=u"Directory to search for configuration"
1663
u" files")
1664
parser.add_option("--no-dbus", action=u"store_false",
1665
dest=u"use_dbus", help=u"Do not provide D-Bus"
1666
u" system bus interface")
1667
parser.add_option("--no-ipv6", action=u"store_false",
1668
dest=u"use_ipv6", help=u"Do not use IPv6")
1110
1669
options = parser.parse_args()[0]
1111
1670
1112
1671
if options.check:
1115
1674
sys.exit()
1116
1675
1117
1676
# Default values for config file for server-global settings
1118
server_defaults = { "interface": "",
1119
"address": "",
1120
"port": "",
1121
"debug": "False",
1122
"priority":
1123
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1124
"servicename": "Mandos",
1125
"use_dbus": "True",
1126
"use_ipv6": "True",
1677
server_defaults = { u"interface": u"",
1678
u"address": u"",
1679
u"port": u"",
1680
u"debug": u"False",
1681
u"priority":
1682
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1683
u"servicename": u"Mandos",
1684
u"use_dbus": u"True",
1685
u"use_ipv6": u"True",
1686
u"debuglevel": u"",
1127
1687
}
1128
1688
1129
1689
# Parse config file for server-global settings
1130
server_config = ConfigParser.SafeConfigParser(server_defaults)
1690
server_config = configparser.SafeConfigParser(server_defaults)
1131
1691
del server_defaults
1132
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1692
server_config.read(os.path.join(options.configdir,
1693
u"mandos.conf"))
1133
1694
# Convert the SafeConfigParser object to a dict
1134
1695
server_settings = server_config.defaults()
1135
1696
# Use the appropriate methods on the non-string config options
1136
server_settings["debug"] = server_config.getboolean("DEFAULT",
1137
"debug")
1138
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
1139
"use_dbus")
1140
server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
1141
"use_ipv6")
1697
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1698
server_settings[option] = server_config.getboolean(u"DEFAULT",
1699
option)
1142
1700
if server_settings["port"]:
1143
server_settings["port"] = server_config.getint("DEFAULT",
1144
"port")
1701
server_settings["port"] = server_config.getint(u"DEFAULT",
1702
u"port")
1145
1703
del server_config
1146
1704
1147
1705
# Override the settings from the config file with command line
1148
1706
# options, if set.
1149
for option in ("interface", "address", "port", "debug",
1150
"priority", "servicename", "configdir",
1151
"use_dbus", "use_ipv6"):
1707
for option in (u"interface", u"address", u"port", u"debug",
1708
u"priority", u"servicename", u"configdir",
1709
u"use_dbus", u"use_ipv6", u"debuglevel"):
1152
1710
value = getattr(options, option)
1153
1711
if value is not None:
1154
1712
server_settings[option] = value
1155
1713
del options
1714
# Force all strings to be unicode
1715
for option in server_settings.keys():
1716
if type(server_settings[option]) is str:
1717
server_settings[option] = unicode(server_settings[option])
1156
1718
# Now we have our good server settings in "server_settings"
1157
1719
1158
1720
##################################################################
1159
1721
1160
1722
# For convenience
1161
debug = server_settings["debug"]
1162
use_dbus = server_settings["use_dbus"]
1163
use_ipv6 = server_settings["use_ipv6"]
1164
1165
if not debug:
1166
syslogger.setLevel(logging.WARNING)
1167
console.setLevel(logging.WARNING)
1168
1169
if server_settings["servicename"] != "Mandos":
1723
debug = server_settings[u"debug"]
1724
debuglevel = server_settings[u"debuglevel"]
1725
use_dbus = server_settings[u"use_dbus"]
1726
use_ipv6 = server_settings[u"use_ipv6"]
1727
1728
if server_settings[u"servicename"] != u"Mandos":
1170
1729
syslogger.setFormatter(logging.Formatter
1171
('Mandos (%s) [%%(process)d]:'
1172
' %%(levelname)s: %%(message)s'
1173
% server_settings["servicename"]))
1730
(u'Mandos (%s) [%%(process)d]:'
1731
u' %%(levelname)s: %%(message)s'
1732
% server_settings[u"servicename"]))
1174
1733
1175
1734
# Parse config file with clients
1176
client_defaults = { "timeout": "1h",
1177
"interval": "5m",
1178
"checker": "fping -q -- %%(host)s",
1179
"host": "",
1735
client_defaults = { u"timeout": u"1h",
1736
u"interval": u"5m",
1737
u"checker": u"fping -q -- %%(host)s",
1738
u"host": u"",
1739
u"approval_delay": u"0s",
1740
u"approval_duration": u"1s",
1180
1741
}
1181
client_config = ConfigParser.SafeConfigParser(client_defaults)
1182
client_config.read(os.path.join(server_settings["configdir"],
1183
"clients.conf"))
1184
1742
client_config = configparser.SafeConfigParser(client_defaults)
1743
client_config.read(os.path.join(server_settings[u"configdir"],
1744
u"clients.conf"))
1745
1185
1746
global mandos_dbus_service
1186
1747
mandos_dbus_service = None
1187
1748
1188
clients = Set()
1189
tcp_server = IPv6_TCPServer((server_settings["address"],
1190
server_settings["port"]),
1191
TCP_handler,
1192
settings=server_settings,
1193
clients=clients, use_ipv6=use_ipv6)
1194
pidfilename = "/var/run/mandos.pid"
1749
tcp_server = MandosServer((server_settings[u"address"],
1750
server_settings[u"port"]),
1751
ClientHandler,
1752
interface=(server_settings[u"interface"]
1753
or None),
1754
use_ipv6=use_ipv6,
1755
gnutls_priority=
1756
server_settings[u"priority"],
1757
use_dbus=use_dbus)
1758
pidfilename = u"/var/run/mandos.pid"
1195
1759
try:
1196
pidfile = open(pidfilename, "w")
1760
pidfile = open(pidfilename, u"w")
1197
1761
except IOError:
1198
logger.error("Could not open file %r", pidfilename)
1762
logger.error(u"Could not open file %r", pidfilename)
1199
1763
1200
1764
try:
1201
uid = pwd.getpwnam("_mandos").pw_uid
1202
gid = pwd.getpwnam("_mandos").pw_gid
1765
uid = pwd.getpwnam(u"_mandos").pw_uid
1766
gid = pwd.getpwnam(u"_mandos").pw_gid
1203
1767
except KeyError:
1204
1768
try:
1205
uid = pwd.getpwnam("mandos").pw_uid
1206
gid = pwd.getpwnam("mandos").pw_gid
1769
uid = pwd.getpwnam(u"mandos").pw_uid
1770
gid = pwd.getpwnam(u"mandos").pw_gid
1207
1771
except KeyError:
1208
1772
try:
1209
uid = pwd.getpwnam("nobody").pw_uid
1210
gid = pwd.getpwnam("nogroup").pw_gid
1773
uid = pwd.getpwnam(u"nobody").pw_uid
1774
gid = pwd.getpwnam(u"nobody").pw_gid
1211
1775
except KeyError:
1212
1776
uid = 65534
1213
1777
gid = 65534
1218
1782
if error[0] != errno.EPERM:
1219
1783
raise error
1220
1784
1221
# Enable all possible GnuTLS debugging
1785
if not debug and not debuglevel:
1786
syslogger.setLevel(logging.WARNING)
1787
console.setLevel(logging.WARNING)
1788
if debuglevel:
1789
level = getattr(logging, debuglevel.upper())
1790
syslogger.setLevel(level)
1791
console.setLevel(level)
1792
1222
1793
if debug:
1794
# Enable all possible GnuTLS debugging
1795
1223
1796
# "Use a log level over 10 to enable all debugging options."
1224
1797
# - GnuTLS manual
1225
1798
gnutls.library.functions.gnutls_global_set_log_level(11)
1226
1799
1227
1800
@gnutls.library.types.gnutls_log_func
1228
1801
def debug_gnutls(level, string):
1229
logger.debug("GnuTLS: %s", string[:-1])
1802
logger.debug(u"GnuTLS: %s", string[:-1])
1230
1803
1231
1804
(gnutls.library.functions
1232
1805
.gnutls_global_set_log_function(debug_gnutls))
1806
1807
# Redirect stdin so all checkers get /dev/null
1808
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1809
os.dup2(null, sys.stdin.fileno())
1810
if null > 2:
1811
os.close(null)
1812
else:
1813
# No console logging
1814
logger.removeHandler(console)
1233
1815
1234
global service
1235
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1236
service = AvahiService(name = server_settings["servicename"],
1237
servicetype = "_mandos._tcp",
1238
protocol = protocol)
1239
if server_settings["interface"]:
1240
service.interface = (if_nametoindex
1241
(server_settings["interface"]))
1242
1816
1243
1817
global main_loop
1244
global bus
1245
global server
1246
1818
# From the Avahi example code
1247
1819
DBusGMainLoop(set_as_default=True )
1248
1820
main_loop = gobject.MainLoop()
1249
1821
bus = dbus.SystemBus()
1250
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1251
avahi.DBUS_PATH_SERVER),
1252
avahi.DBUS_INTERFACE_SERVER)
1253
1822
# End of Avahi example code
1254
1823
if use_dbus:
1255
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1824
try:
1825
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1826
bus, do_not_queue=True)
1827
except dbus.exceptions.NameExistsException, e:
1828
logger.error(unicode(e) + u", disabling D-Bus")
1829
use_dbus = False
1830
server_settings[u"use_dbus"] = False
1831
tcp_server.use_dbus = False
1832
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1833
service = AvahiService(name = server_settings[u"servicename"],
1834
servicetype = u"_mandos._tcp",
1835
protocol = protocol, bus = bus)
1836
if server_settings["interface"]:
1837
service.interface = (if_nametoindex
1838
(str(server_settings[u"interface"])))
1839
1840
if not debug:
1841
# Close all input and output, do double fork, etc.
1842
daemon()
1843
1844
global multiprocessing_manager
1845
multiprocessing_manager = multiprocessing.Manager()
1256
1846
1257
1847
client_class = Client
1258
1848
if use_dbus:
1259
client_class = ClientDBus
1260
clients.update(Set(
1849
client_class = functools.partial(ClientDBus, bus = bus)
1850
def client_config_items(config, section):
1851
special_settings = {
1852
"approved_by_default":
1853
lambda: config.getboolean(section,
1854
"approved_by_default"),
1855
}
1856
for name, value in config.items(section):
1857
try:
1858
yield (name, special_settings[name]())
1859
except KeyError:
1860
yield (name, value)
1861
1862
tcp_server.clients.update(set(
1261
1863
client_class(name = section,
1262
config= dict(client_config.items(section)))
1864
config= dict(client_config_items(
1865
client_config, section)))
1263
1866
for section in client_config.sections()))
1264
if not clients:
1867
if not tcp_server.clients:
1265
1868
logger.warning(u"No clients defined")
1266
1267
if debug:
1268
# Redirect stdin so all checkers get /dev/null
1269
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1270
os.dup2(null, sys.stdin.fileno())
1271
if null > 2:
1272
os.close(null)
1273
else:
1274
# No console logging
1275
logger.removeHandler(console)
1276
# Close all input and output, do double fork, etc.
1277
daemon()
1278
1869
1279
1870
try:
1280
with closing(pidfile):
1871
with pidfile:
1281
1872
pid = os.getpid()
1282
1873
pidfile.write(str(pid) + "\n")
1283
1874
del pidfile
1289
1880
pass
1290
1881
del pidfilename
1291
1882
1292
def cleanup():
1293
"Cleanup function; run on exit"
1294
global group
1295
# From the Avahi example code
1296
if not group is None:
1297
group.Free()
1298
group = None
1299
# End of Avahi example code
1300
1301
while clients:
1302
client = clients.pop()
1303
client.disable_hook = None
1304
client.disable()
1305
1306
atexit.register(cleanup)
1307
1308
1883
if not debug:
1309
1884
signal.signal(signal.SIGINT, signal.SIG_IGN)
1310
1885
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1314
1889
class MandosDBusService(dbus.service.Object):
1315
1890
"""A D-Bus proxy object"""
1316
1891
def __init__(self):
1317
dbus.service.Object.__init__(self, bus, "/")
1892
dbus.service.Object.__init__(self, bus, u"/")
1318
1893
_interface = u"se.bsnet.fukt.Mandos"
1319
1894
1320
@dbus.service.signal(_interface, signature="oa{sv}")
1321
def ClientAdded(self, objpath, properties):
1322
"D-Bus signal"
1323
pass
1324
1325
@dbus.service.signal(_interface, signature="s")
1326
def ClientNotFound(self, fingerprint):
1327
"D-Bus signal"
1328
pass
1329
1330
@dbus.service.signal(_interface, signature="os")
1895
@dbus.service.signal(_interface, signature=u"o")
1896
def ClientAdded(self, objpath):
1897
"D-Bus signal"
1898
pass
1899
1900
@dbus.service.signal(_interface, signature=u"ss")
1901
def ClientNotFound(self, fingerprint, address):
1902
"D-Bus signal"
1903
pass
1904
1905
@dbus.service.signal(_interface, signature=u"os")
1331
1906
def ClientRemoved(self, objpath, name):
1332
1907
"D-Bus signal"
1333
1908
pass
1334
1909
1335
@dbus.service.method(_interface, out_signature="ao")
1910
@dbus.service.method(_interface, out_signature=u"ao")
1336
1911
def GetAllClients(self):
1337
1912
"D-Bus method"
1338
return dbus.Array(c.dbus_object_path for c in clients)
1913
return dbus.Array(c.dbus_object_path
1914
for c in tcp_server.clients)
1339
1915
1340
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1916
@dbus.service.method(_interface,
1917
out_signature=u"a{oa{sv}}")
1341
1918
def GetAllClientsWithProperties(self):
1342
1919
"D-Bus method"
1343
1920
return dbus.Dictionary(
1344
((c.dbus_object_path, c.GetAllProperties())
1345
for c in clients),
1346
signature="oa{sv}")
1921
((c.dbus_object_path, c.GetAll(u""))
1922
for c in tcp_server.clients),
1923
signature=u"oa{sv}")
1347
1924
1348
@dbus.service.method(_interface, in_signature="o")
1925
@dbus.service.method(_interface, in_signature=u"o")
1349
1926
def RemoveClient(self, object_path):
1350
1927
"D-Bus method"
1351
for c in clients:
1928
for c in tcp_server.clients:
1352
1929
if c.dbus_object_path == object_path:
1353
clients.remove(c)
1930
tcp_server.clients.remove(c)
1354
1931
c.remove_from_connection()
1355
1932
# Don't signal anything except ClientRemoved
1356
c.disable(signal=False)
1933
c.disable(quiet=True)
1357
1934
# Emit D-Bus signal
1358
1935
self.ClientRemoved(object_path, c.name)
1359
1936
return
1360
raise KeyError
1937
raise KeyError(object_path)
1361
1938
1362
1939
del _interface
1363
1940
1364
1941
mandos_dbus_service = MandosDBusService()
1365
1942
1366
for client in clients:
1943
def cleanup():
1944
"Cleanup function; run on exit"
1945
service.cleanup()
1946
1947
while tcp_server.clients:
1948
client = tcp_server.clients.pop()
1949
if use_dbus:
1950
client.remove_from_connection()
1951
client.disable_hook = None
1952
# Don't signal anything except ClientRemoved
1953
client.disable(quiet=True)
1954
if use_dbus:
1955
# Emit D-Bus signal
1956
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1957
client.name)
1958
1959
atexit.register(cleanup)
1960
1961
for client in tcp_server.clients:
1367
1962
if use_dbus:
1368
1963
# Emit D-Bus signal
1369
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1370
client.GetAllProperties())
1964
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1371
1965
client.enable()
1372
1966
1373
1967
tcp_server.enable()
1387
1981
1388
1982
try:
1389
1983
# From the Avahi example code
1390
server.connect_to_signal("StateChanged", server_state_changed)
1391
1984
try:
1392
server_state_changed(server.GetState())
1985
service.activate()
1393
1986
except dbus.exceptions.DBusException, error:
1394
1987
logger.critical(u"DBusException: %s", error)
1988
cleanup()
1395
1989
sys.exit(1)
1396
1990
# End of Avahi example code
1397
1991
1404
1998
main_loop.run()
1405
1999
except AvahiError, error:
1406
2000
logger.critical(u"AvahiError: %s", error)
2001
cleanup()
1407
2002
sys.exit(1)
1408
2003
except KeyboardInterrupt:
1409
2004
if debug:
1410
2005
print >> sys.stderr
1411
logger.debug("Server received KeyboardInterrupt")
1412
logger.debug("Server exiting")
2006
logger.debug(u"Server received KeyboardInterrupt")
2007
logger.debug(u"Server exiting")
2008
# Must run before the D-Bus bus name gets deregistered
2009
cleanup()
1413
2010
1414
2011
if __name__ == '__main__':
1415
2012
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0