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- Committer: Teddy Hogeborn
- Date: 2008-01-18 20:11:37 UTC
- Revision ID: teddy@fukt.bsnet.se-20080118201137-oxhupsfl5ut9cjz5
* server.py (server_metaclass): New.
(IPv6_UDPServer, IPv6_TCPServer): Use "server_metaclass" instead of
"server_bind" and "init_with_options". Removed "address_family" and
"allow_reuse_address", since they are now added in "server_metaclass".
(server_bind, init_with_options): Removed.
(main): Pass "options" to Client constructor.
(Client.__init__): Take an "options" parameter and use it.
(IPv6_UDPServer, IPv6_TCPServer): Use "server_metaclass" instead of
"server_bind" and "init_with_options". Removed "address_family" and
"allow_reuse_address", since they are now added in "server_metaclass".
(server_bind, init_with_options): Removed.
(main): Pass "options" to Client constructor.
(Client.__init__): Take an "options" parameter and use it.
- files added:
- bad-ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- plugins.d
- files renamed:
- clients.conf => mandos-clients.conf
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
1
1
#!/usr/bin/python
2
# -*- mode: python; coding: utf-8 -*-
3
#
4
# Mandos server - give out binary blobs to connecting clients.
5
#
6
# This program is partly derived from an example program for an Avahi
7
# service publisher, downloaded from
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
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
#
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
19
# the Free Software Foundation, either version 3 of the License, or
20
# (at your option) any later version.
21
#
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
# GNU General Public License for more details.
26
#
27
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
33
34
from __future__ import division, with_statement, absolute_import
35
36
import SocketServer as socketserver
2
3
import SocketServer
37
4
import socket
38
import optparse
5
import select
6
from optparse import OptionParser
39
7
import datetime
40
8
import errno
41
9
import gnutls.crypto
42
10
import gnutls.connection
43
11
import gnutls.errors
44
import gnutls.library.functions
45
import gnutls.library.constants
46
import gnutls.library.types
47
import ConfigParser as configparser
12
import ConfigParser
48
13
import sys
49
import re
50
import os
51
import signal
52
import subprocess
53
import atexit
54
import stat
55
import logging
56
import logging.handlers
57
import pwd
58
from contextlib import closing
59
import struct
60
import fcntl
61
import functools
62
63
import dbus
64
import dbus.service
65
import gobject
66
import avahi
67
from dbus.mainloop.glib import DBusGMainLoop
68
import ctypes
69
import ctypes.util
70
import xml.dom.minidom
71
import inspect
72
73
try:
74
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
75
except AttributeError:
76
try:
77
from IN import SO_BINDTODEVICE
78
except ImportError:
79
SO_BINDTODEVICE = None
80
81
82
version = "1.0.12"
83
84
logger = logging.Logger(u'mandos')
85
syslogger = (logging.handlers.SysLogHandler
86
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
87
address = "/dev/log"))
88
syslogger.setFormatter(logging.Formatter
89
(u'Mandos [%(process)d]: %(levelname)s:'
90
u' %(message)s'))
91
logger.addHandler(syslogger)
92
93
console = logging.StreamHandler()
94
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
95
u' %(levelname)s:'
96
u' %(message)s'))
97
logger.addHandler(console)
98
99
class AvahiError(Exception):
100
def __init__(self, value, *args, **kwargs):
101
self.value = value
102
super(AvahiError, self).__init__(value, *args, **kwargs)
103
def __unicode__(self):
104
return unicode(repr(self.value))
105
106
class AvahiServiceError(AvahiError):
107
pass
108
109
class AvahiGroupError(AvahiError):
110
pass
111
112
113
class AvahiService(object):
114
"""An Avahi (Zeroconf) service.
115
116
Attributes:
117
interface: integer; avahi.IF_UNSPEC or an interface index.
118
Used to optionally bind to the specified interface.
119
name: string; Example: u'Mandos'
120
type: string; Example: u'_mandos._tcp'.
121
See <http://www.dns-sd.org/ServiceTypes.html>
122
port: integer; what port to announce
123
TXT: list of strings; TXT record for the service
124
domain: string; Domain to publish on, default to .local if empty.
125
host: string; Host to publish records for, default is localhost
126
max_renames: integer; maximum number of renames
127
rename_count: integer; counter so we only rename after collisions
128
a sensible number of times
129
group: D-Bus Entry Group
130
server: D-Bus Server
131
bus: dbus.SystemBus()
132
"""
133
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
134
servicetype = None, port = None, TXT = None,
135
domain = u"", host = u"", max_renames = 32768,
136
protocol = avahi.PROTO_UNSPEC, bus = None):
137
self.interface = interface
138
self.name = name
139
self.type = servicetype
140
self.port = port
141
self.TXT = TXT if TXT is not None else []
142
self.domain = domain
143
self.host = host
144
self.rename_count = 0
145
self.max_renames = max_renames
146
self.protocol = protocol
147
self.group = None # our entry group
148
self.server = None
149
self.bus = bus
150
def rename(self):
151
"""Derived from the Avahi example code"""
152
if self.rename_count >= self.max_renames:
153
logger.critical(u"No suitable Zeroconf service name found"
154
u" after %i retries, exiting.",
155
self.rename_count)
156
raise AvahiServiceError(u"Too many renames")
157
self.name = self.server.GetAlternativeServiceName(self.name)
158
logger.info(u"Changing Zeroconf service name to %r ...",
159
unicode(self.name))
160
syslogger.setFormatter(logging.Formatter
161
(u'Mandos (%s) [%%(process)d]:'
162
u' %%(levelname)s: %%(message)s'
163
% self.name))
164
self.remove()
165
self.add()
166
self.rename_count += 1
167
def remove(self):
168
"""Derived from the Avahi example code"""
169
if self.group is not None:
170
self.group.Reset()
171
def add(self):
172
"""Derived from the Avahi example code"""
173
if self.group is None:
174
self.group = dbus.Interface(
175
self.bus.get_object(avahi.DBUS_NAME,
176
self.server.EntryGroupNew()),
177
avahi.DBUS_INTERFACE_ENTRY_GROUP)
178
self.group.connect_to_signal('StateChanged',
179
self
180
.entry_group_state_changed)
181
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
182
self.name, self.type)
183
self.group.AddService(
184
self.interface,
185
self.protocol,
186
dbus.UInt32(0), # flags
187
self.name, self.type,
188
self.domain, self.host,
189
dbus.UInt16(self.port),
190
avahi.string_array_to_txt_array(self.TXT))
191
self.group.Commit()
192
def entry_group_state_changed(self, state, error):
193
"""Derived from the Avahi example code"""
194
logger.debug(u"Avahi state change: %i", state)
195
196
if state == avahi.ENTRY_GROUP_ESTABLISHED:
197
logger.debug(u"Zeroconf service established.")
198
elif state == avahi.ENTRY_GROUP_COLLISION:
199
logger.warning(u"Zeroconf service name collision.")
200
self.rename()
201
elif state == avahi.ENTRY_GROUP_FAILURE:
202
logger.critical(u"Avahi: Error in group state changed %s",
203
unicode(error))
204
raise AvahiGroupError(u"State changed: %s"
205
% unicode(error))
206
def cleanup(self):
207
"""Derived from the Avahi example code"""
208
if self.group is not None:
209
self.group.Free()
210
self.group = None
211
def server_state_changed(self, state):
212
"""Derived from the Avahi example code"""
213
if state == avahi.SERVER_COLLISION:
214
logger.error(u"Zeroconf server name collision")
215
self.remove()
216
elif state == avahi.SERVER_RUNNING:
217
self.add()
218
def activate(self):
219
"""Derived from the Avahi example code"""
220
if self.server is None:
221
self.server = dbus.Interface(
222
self.bus.get_object(avahi.DBUS_NAME,
223
avahi.DBUS_PATH_SERVER),
224
avahi.DBUS_INTERFACE_SERVER)
225
self.server.connect_to_signal(u"StateChanged",
226
self.server_state_changed)
227
self.server_state_changed(self.server.GetState())
228
14
229
15
230
16
class Client(object):
231
"""A representation of a client host served by this server.
232
233
Attributes:
234
name: string; from the config file, used in log messages and
235
D-Bus identifiers
236
fingerprint: string (40 or 32 hexadecimal digits); used to
237
uniquely identify the client
238
secret: bytestring; sent verbatim (over TLS) to client
239
host: string; available for use by the checker command
240
created: datetime.datetime(); (UTC) object creation
241
last_enabled: datetime.datetime(); (UTC)
242
enabled: bool()
243
last_checked_ok: datetime.datetime(); (UTC) or None
244
timeout: datetime.timedelta(); How long from last_checked_ok
245
until this client is invalid
246
interval: datetime.timedelta(); How often to start a new checker
247
disable_hook: If set, called by disable() as disable_hook(self)
248
checker: subprocess.Popen(); a running checker process used
249
to see if the client lives.
250
'None' if no process is running.
251
checker_initiator_tag: a gobject event source tag, or None
252
disable_initiator_tag: - '' -
253
checker_callback_tag: - '' -
254
checker_command: string; External command which is run to check if
255
client lives. %() expansions are done at
256
runtime with vars(self) as dict, so that for
257
instance %(name)s can be used in the command.
258
current_checker_command: string; current running checker_command
259
"""
260
261
@staticmethod
262
def _timedelta_to_milliseconds(td):
263
"Convert a datetime.timedelta() to milliseconds"
264
return ((td.days * 24 * 60 * 60 * 1000)
265
+ (td.seconds * 1000)
266
+ (td.microseconds // 1000))
267
268
def timeout_milliseconds(self):
269
"Return the 'timeout' attribute in milliseconds"
270
return self._timedelta_to_milliseconds(self.timeout)
271
272
def interval_milliseconds(self):
273
"Return the 'interval' attribute in milliseconds"
274
return self._timedelta_to_milliseconds(self.interval)
275
276
def __init__(self, name = None, disable_hook=None, config=None):
277
"""Note: the 'checker' key in 'config' sets the
278
'checker_command' attribute and *not* the 'checker'
279
attribute."""
17
def __init__(self, name=None, options=None, dn=None,
18
password=None, passfile=None, fqdn=None,
19
timeout=None, interval=-1):
280
20
self.name = name
281
if config is None:
282
config = {}
283
logger.debug(u"Creating client %r", self.name)
284
# Uppercase and remove spaces from fingerprint for later
285
# comparison purposes with return value from the fingerprint()
286
# function
287
self.fingerprint = (config[u"fingerprint"].upper()
288
.replace(u" ", u""))
289
logger.debug(u" Fingerprint: %s", self.fingerprint)
290
if u"secret" in config:
291
self.secret = config[u"secret"].decode(u"base64")
292
elif u"secfile" in config:
293
with closing(open(os.path.expanduser
294
(os.path.expandvars
295
(config[u"secfile"])))) as secfile:
296
self.secret = secfile.read()
297
else:
298
raise TypeError(u"No secret or secfile for client %s"
299
% self.name)
300
self.host = config.get(u"host", u"")
301
self.created = datetime.datetime.utcnow()
302
self.enabled = False
303
self.last_enabled = None
304
self.last_checked_ok = None
305
self.timeout = string_to_delta(config[u"timeout"])
306
self.interval = string_to_delta(config[u"interval"])
307
self.disable_hook = disable_hook
308
self.checker = None
309
self.checker_initiator_tag = None
310
self.disable_initiator_tag = None
311
self.checker_callback_tag = None
312
self.checker_command = config[u"checker"]
313
self.current_checker_command = None
314
self.last_connect = None
315
316
def enable(self):
317
"""Start this client's checker and timeout hooks"""
318
if getattr(self, u"enabled", False):
319
# Already enabled
320
return
321
self.last_enabled = datetime.datetime.utcnow()
322
# Schedule a new checker to be started an 'interval' from now,
323
# and every interval from then on.
324
self.checker_initiator_tag = (gobject.timeout_add
325
(self.interval_milliseconds(),
326
self.start_checker))
327
# Also start a new checker *right now*.
328
self.start_checker()
329
# Schedule a disable() when 'timeout' has passed
330
self.disable_initiator_tag = (gobject.timeout_add
331
(self.timeout_milliseconds(),
332
self.disable))
333
self.enabled = True
334
335
def disable(self):
336
"""Disable this client."""
337
if not getattr(self, "enabled", False):
338
return False
339
logger.info(u"Disabling client %s", self.name)
340
if getattr(self, u"disable_initiator_tag", False):
341
gobject.source_remove(self.disable_initiator_tag)
342
self.disable_initiator_tag = None
343
if getattr(self, u"checker_initiator_tag", False):
344
gobject.source_remove(self.checker_initiator_tag)
345
self.checker_initiator_tag = None
346
self.stop_checker()
347
if self.disable_hook:
348
self.disable_hook(self)
349
self.enabled = False
350
# Do not run this again if called by a gobject.timeout_add
351
return False
352
353
def __del__(self):
354
self.disable_hook = None
355
self.disable()
356
357
def checker_callback(self, pid, condition, command):
358
"""The checker has completed, so take appropriate actions."""
359
self.checker_callback_tag = None
360
self.checker = None
361
if os.WIFEXITED(condition):
362
exitstatus = os.WEXITSTATUS(condition)
363
if exitstatus == 0:
364
logger.info(u"Checker for %(name)s succeeded",
365
vars(self))
366
self.checked_ok()
367
else:
368
logger.info(u"Checker for %(name)s failed",
369
vars(self))
370
else:
371
logger.warning(u"Checker for %(name)s crashed?",
372
vars(self))
373
374
def checked_ok(self):
375
"""Bump up the timeout for this client.
376
377
This should only be called when the client has been seen,
378
alive and well.
379
"""
380
self.last_checked_ok = datetime.datetime.utcnow()
381
gobject.source_remove(self.disable_initiator_tag)
382
self.disable_initiator_tag = (gobject.timeout_add
383
(self.timeout_milliseconds(),
384
self.disable))
385
386
def start_checker(self):
387
"""Start a new checker subprocess if one is not running.
388
389
If a checker already exists, leave it running and do
390
nothing."""
391
# The reason for not killing a running checker is that if we
392
# did that, then if a checker (for some reason) started
393
# running slowly and taking more than 'interval' time, the
394
# client would inevitably timeout, since no checker would get
395
# a chance to run to completion. If we instead leave running
396
# checkers alone, the checker would have to take more time
397
# than 'timeout' for the client to be declared invalid, which
398
# is as it should be.
399
400
# If a checker exists, make sure it is not a zombie
401
try:
402
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
403
except (AttributeError, OSError), error:
404
if (isinstance(error, OSError)
405
and error.errno != errno.ECHILD):
406
raise error
407
else:
408
if pid:
409
logger.warning(u"Checker was a zombie")
410
gobject.source_remove(self.checker_callback_tag)
411
self.checker_callback(pid, status,
412
self.current_checker_command)
413
# Start a new checker if needed
414
if self.checker is None:
415
try:
416
# In case checker_command has exactly one % operator
417
command = self.checker_command % self.host
418
except TypeError:
419
# Escape attributes for the shell
420
escaped_attrs = dict((key,
421
re.escape(unicode(str(val),
422
errors=
423
u'replace')))
424
for key, val in
425
vars(self).iteritems())
426
try:
427
command = self.checker_command % escaped_attrs
428
except TypeError, error:
429
logger.error(u'Could not format string "%s":'
430
u' %s', self.checker_command, error)
431
return True # Try again later
432
self.current_checker_command = command
433
try:
434
logger.info(u"Starting checker %r for %s",
435
command, self.name)
436
# We don't need to redirect stdout and stderr, since
437
# in normal mode, that is already done by daemon(),
438
# and in debug mode we don't want to. (Stdin is
439
# always replaced by /dev/null.)
440
self.checker = subprocess.Popen(command,
441
close_fds=True,
442
shell=True, cwd=u"/")
443
self.checker_callback_tag = (gobject.child_watch_add
444
(self.checker.pid,
445
self.checker_callback,
446
data=command))
447
# The checker may have completed before the gobject
448
# watch was added. Check for this.
449
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
450
if pid:
451
gobject.source_remove(self.checker_callback_tag)
452
self.checker_callback(pid, status, command)
453
except OSError, error:
454
logger.error(u"Failed to start subprocess: %s",
455
error)
456
# Re-run this periodically if run by gobject.timeout_add
457
return True
458
459
def stop_checker(self):
460
"""Force the checker process, if any, to stop."""
461
if self.checker_callback_tag:
462
gobject.source_remove(self.checker_callback_tag)
463
self.checker_callback_tag = None
464
if getattr(self, u"checker", None) is None:
465
return
466
logger.debug(u"Stopping checker for %(name)s", vars(self))
467
try:
468
os.kill(self.checker.pid, signal.SIGTERM)
469
#os.sleep(0.5)
470
#if self.checker.poll() is None:
471
# os.kill(self.checker.pid, signal.SIGKILL)
472
except OSError, error:
473
if error.errno != errno.ESRCH: # No such process
474
raise
475
self.checker = None
476
477
def still_valid(self):
478
"""Has the timeout not yet passed for this client?"""
479
if not getattr(self, u"enabled", False):
480
return False
481
now = datetime.datetime.utcnow()
482
if self.last_checked_ok is None:
483
return now < (self.created + self.timeout)
484
else:
485
return now < (self.last_checked_ok + self.timeout)
486
487
488
def dbus_service_property(dbus_interface, signature=u"v",
489
access=u"readwrite", byte_arrays=False):
490
"""Decorators for marking methods of a DBusObjectWithProperties to
491
become properties on the D-Bus.
492
493
The decorated method will be called with no arguments by "Get"
494
and with one argument by "Set".
495
496
The parameters, where they are supported, are the same as
497
dbus.service.method, except there is only "signature", since the
498
type from Get() and the type sent to Set() is the same.
499
"""
500
def decorator(func):
501
func._dbus_is_property = True
502
func._dbus_interface = dbus_interface
503
func._dbus_signature = signature
504
func._dbus_access = access
505
func._dbus_name = func.__name__
506
if func._dbus_name.endswith(u"_dbus_property"):
507
func._dbus_name = func._dbus_name[:-14]
508
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
509
return func
510
return decorator
511
512
513
class DBusPropertyException(dbus.exceptions.DBusException):
514
"""A base class for D-Bus property-related exceptions
515
"""
516
def __unicode__(self):
517
return unicode(str(self))
518
519
520
class DBusPropertyAccessException(DBusPropertyException):
521
"""A property's access permissions disallows an operation.
522
"""
523
pass
524
525
526
class DBusPropertyNotFound(DBusPropertyException):
527
"""An attempt was made to access a non-existing property.
528
"""
529
pass
530
531
532
class DBusObjectWithProperties(dbus.service.Object):
533
"""A D-Bus object with properties.
534
535
Classes inheriting from this can use the dbus_service_property
536
decorator to expose methods as D-Bus properties. It exposes the
537
standard Get(), Set(), and GetAll() methods on the D-Bus.
538
"""
539
540
@staticmethod
541
def _is_dbus_property(obj):
542
return getattr(obj, u"_dbus_is_property", False)
543
544
def _get_all_dbus_properties(self):
545
"""Returns a generator of (name, attribute) pairs
546
"""
547
return ((prop._dbus_name, prop)
548
for name, prop in
549
inspect.getmembers(self, self._is_dbus_property))
550
551
def _get_dbus_property(self, interface_name, property_name):
552
"""Returns a bound method if one exists which is a D-Bus
553
property with the specified name and interface.
554
"""
555
for name in (property_name,
556
property_name + u"_dbus_property"):
557
prop = getattr(self, name, None)
558
if (prop is None
559
or not self._is_dbus_property(prop)
560
or prop._dbus_name != property_name
561
or (interface_name and prop._dbus_interface
562
and interface_name != prop._dbus_interface)):
563
continue
564
return prop
565
# No such property
566
raise DBusPropertyNotFound(self.dbus_object_path + u":"
567
+ interface_name + u"."
568
+ property_name)
569
570
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
571
out_signature=u"v")
572
def Get(self, interface_name, property_name):
573
"""Standard D-Bus property Get() method, see D-Bus standard.
574
"""
575
prop = self._get_dbus_property(interface_name, property_name)
576
if prop._dbus_access == u"write":
577
raise DBusPropertyAccessException(property_name)
578
value = prop()
579
if not hasattr(value, u"variant_level"):
580
return value
581
return type(value)(value, variant_level=value.variant_level+1)
582
583
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
584
def Set(self, interface_name, property_name, value):
585
"""Standard D-Bus property Set() method, see D-Bus standard.
586
"""
587
prop = self._get_dbus_property(interface_name, property_name)
588
if prop._dbus_access == u"read":
589
raise DBusPropertyAccessException(property_name)
590
if prop._dbus_get_args_options[u"byte_arrays"]:
591
value = dbus.ByteArray(''.join(unichr(byte)
592
for byte in value))
593
prop(value)
594
595
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
596
out_signature=u"a{sv}")
597
def GetAll(self, interface_name):
598
"""Standard D-Bus property GetAll() method, see D-Bus
599
standard.
600
601
Note: Will not include properties with access="write".
602
"""
603
all = {}
604
for name, prop in self._get_all_dbus_properties():
605
if (interface_name
606
and interface_name != prop._dbus_interface):
607
# Interface non-empty but did not match
608
continue
609
# Ignore write-only properties
610
if prop._dbus_access == u"write":
611
continue
612
value = prop()
613
if not hasattr(value, u"variant_level"):
614
all[name] = value
615
continue
616
all[name] = type(value)(value, variant_level=
617
value.variant_level+1)
618
return dbus.Dictionary(all, signature=u"sv")
619
620
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
621
out_signature=u"s",
622
path_keyword='object_path',
623
connection_keyword='connection')
624
def Introspect(self, object_path, connection):
625
"""Standard D-Bus method, overloaded to insert property tags.
626
"""
627
xmlstring = dbus.service.Object.Introspect(self, object_path,
628
connection)
629
document = xml.dom.minidom.parseString(xmlstring)
630
del xmlstring
631
def make_tag(document, name, prop):
632
e = document.createElement(u"property")
633
e.setAttribute(u"name", name)
634
e.setAttribute(u"type", prop._dbus_signature)
635
e.setAttribute(u"access", prop._dbus_access)
636
return e
637
for if_tag in document.getElementsByTagName(u"interface"):
638
for tag in (make_tag(document, name, prop)
639
for name, prop
640
in self._get_all_dbus_properties()
641
if prop._dbus_interface
642
== if_tag.getAttribute(u"name")):
643
if_tag.appendChild(tag)
644
xmlstring = document.toxml(u"utf-8")
645
document.unlink()
646
return xmlstring
647
648
649
class ClientDBus(Client, DBusObjectWithProperties):
650
"""A Client class using D-Bus
651
652
Attributes:
653
dbus_object_path: dbus.ObjectPath
654
bus: dbus.SystemBus()
655
"""
656
# dbus.service.Object doesn't use super(), so we can't either.
657
658
def __init__(self, bus = None, *args, **kwargs):
659
self.bus = bus
660
Client.__init__(self, *args, **kwargs)
661
# Only now, when this client is initialized, can it show up on
662
# the D-Bus
663
self.dbus_object_path = (dbus.ObjectPath
664
(u"/clients/"
665
+ self.name.replace(u".", u"_")))
666
DBusObjectWithProperties.__init__(self, self.bus,
667
self.dbus_object_path)
668
669
@staticmethod
670
def _datetime_to_dbus(dt, variant_level=0):
671
"""Convert a UTC datetime.datetime() to a D-Bus type."""
672
return dbus.String(dt.isoformat(),
673
variant_level=variant_level)
674
675
def enable(self):
676
oldstate = getattr(self, u"enabled", False)
677
r = Client.enable(self)
678
if oldstate != self.enabled:
679
# Emit D-Bus signals
680
self.PropertyChanged(dbus.String(u"enabled"),
681
dbus.Boolean(True, variant_level=1))
682
self.PropertyChanged(
683
dbus.String(u"last_enabled"),
684
self._datetime_to_dbus(self.last_enabled,
685
variant_level=1))
686
return r
687
688
def disable(self, signal = True):
689
oldstate = getattr(self, u"enabled", False)
690
r = Client.disable(self)
691
if signal and oldstate != self.enabled:
692
# Emit D-Bus signal
693
self.PropertyChanged(dbus.String(u"enabled"),
694
dbus.Boolean(False, variant_level=1))
695
return r
696
697
def __del__(self, *args, **kwargs):
698
try:
699
self.remove_from_connection()
700
except LookupError:
701
pass
702
if hasattr(DBusObjectWithProperties, u"__del__"):
703
DBusObjectWithProperties.__del__(self, *args, **kwargs)
704
Client.__del__(self, *args, **kwargs)
705
706
def checker_callback(self, pid, condition, command,
707
*args, **kwargs):
708
self.checker_callback_tag = None
709
self.checker = None
710
# Emit D-Bus signal
711
self.PropertyChanged(dbus.String(u"checker_running"),
712
dbus.Boolean(False, variant_level=1))
713
if os.WIFEXITED(condition):
714
exitstatus = os.WEXITSTATUS(condition)
715
# Emit D-Bus signal
716
self.CheckerCompleted(dbus.Int16(exitstatus),
717
dbus.Int64(condition),
718
dbus.String(command))
719
else:
720
# Emit D-Bus signal
721
self.CheckerCompleted(dbus.Int16(-1),
722
dbus.Int64(condition),
723
dbus.String(command))
724
725
return Client.checker_callback(self, pid, condition, command,
726
*args, **kwargs)
727
728
def checked_ok(self, *args, **kwargs):
729
r = Client.checked_ok(self, *args, **kwargs)
730
# Emit D-Bus signal
731
self.PropertyChanged(
732
dbus.String(u"last_checked_ok"),
733
(self._datetime_to_dbus(self.last_checked_ok,
734
variant_level=1)))
735
return r
736
737
def start_checker(self, *args, **kwargs):
738
old_checker = self.checker
739
if self.checker is not None:
740
old_checker_pid = self.checker.pid
741
else:
742
old_checker_pid = None
743
r = Client.start_checker(self, *args, **kwargs)
744
# Only if new checker process was started
745
if (self.checker is not None
746
and old_checker_pid != self.checker.pid):
747
# Emit D-Bus signal
748
self.CheckerStarted(self.current_checker_command)
749
self.PropertyChanged(
750
dbus.String(u"checker_running"),
751
dbus.Boolean(True, variant_level=1))
752
return r
753
754
def stop_checker(self, *args, **kwargs):
755
old_checker = getattr(self, u"checker", None)
756
r = Client.stop_checker(self, *args, **kwargs)
757
if (old_checker is not None
758
and getattr(self, u"checker", None) is None):
759
self.PropertyChanged(dbus.String(u"checker_running"),
760
dbus.Boolean(False, variant_level=1))
761
return r
762
763
## D-Bus methods & signals
764
_interface = u"se.bsnet.fukt.Mandos.Client"
765
766
# CheckedOK - method
767
@dbus.service.method(_interface)
768
def CheckedOK(self):
769
return self.checked_ok()
770
771
# CheckerCompleted - signal
772
@dbus.service.signal(_interface, signature=u"nxs")
773
def CheckerCompleted(self, exitcode, waitstatus, command):
774
"D-Bus signal"
775
pass
776
777
# CheckerStarted - signal
778
@dbus.service.signal(_interface, signature=u"s")
779
def CheckerStarted(self, command):
780
"D-Bus signal"
781
pass
782
783
# PropertyChanged - signal
784
@dbus.service.signal(_interface, signature=u"sv")
785
def PropertyChanged(self, property, value):
786
"D-Bus signal"
787
pass
788
789
# ReceivedSecret - signal
790
@dbus.service.signal(_interface)
791
def ReceivedSecret(self):
792
"D-Bus signal"
793
pass
794
795
# Rejected - signal
796
@dbus.service.signal(_interface)
797
def Rejected(self):
798
"D-Bus signal"
799
pass
800
801
# Enable - method
802
@dbus.service.method(_interface)
803
def Enable(self):
804
"D-Bus method"
805
self.enable()
806
807
# StartChecker - method
808
@dbus.service.method(_interface)
809
def StartChecker(self):
810
"D-Bus method"
811
self.start_checker()
812
813
# Disable - method
814
@dbus.service.method(_interface)
815
def Disable(self):
816
"D-Bus method"
817
self.disable()
818
819
# StopChecker - method
820
@dbus.service.method(_interface)
821
def StopChecker(self):
822
self.stop_checker()
823
824
# name - property
825
@dbus_service_property(_interface, signature=u"s", access=u"read")
826
def name_dbus_property(self):
827
return dbus.String(self.name)
828
829
# fingerprint - property
830
@dbus_service_property(_interface, signature=u"s", access=u"read")
831
def fingerprint_dbus_property(self):
832
return dbus.String(self.fingerprint)
833
834
# host - property
835
@dbus_service_property(_interface, signature=u"s",
836
access=u"readwrite")
837
def host_dbus_property(self, value=None):
838
if value is None: # get
839
return dbus.String(self.host)
840
self.host = value
841
# Emit D-Bus signal
842
self.PropertyChanged(dbus.String(u"host"),
843
dbus.String(value, variant_level=1))
844
845
# created - property
846
@dbus_service_property(_interface, signature=u"s", access=u"read")
847
def created_dbus_property(self):
848
return dbus.String(self._datetime_to_dbus(self.created))
849
850
# last_enabled - property
851
@dbus_service_property(_interface, signature=u"s", access=u"read")
852
def last_enabled_dbus_property(self):
853
if self.last_enabled is None:
854
return dbus.String(u"")
855
return dbus.String(self._datetime_to_dbus(self.last_enabled))
856
857
# enabled - property
858
@dbus_service_property(_interface, signature=u"b",
859
access=u"readwrite")
860
def enabled_dbus_property(self, value=None):
861
if value is None: # get
862
return dbus.Boolean(self.enabled)
863
if value:
864
self.enable()
865
else:
866
self.disable()
867
868
# last_checked_ok - property
869
@dbus_service_property(_interface, signature=u"s",
870
access=u"readwrite")
871
def last_checked_ok_dbus_property(self, value=None):
872
if value is not None:
873
self.checked_ok()
874
return
875
if self.last_checked_ok is None:
876
return dbus.String(u"")
877
return dbus.String(self._datetime_to_dbus(self
878
.last_checked_ok))
879
880
# timeout - property
881
@dbus_service_property(_interface, signature=u"t",
882
access=u"readwrite")
883
def timeout_dbus_property(self, value=None):
884
if value is None: # get
885
return dbus.UInt64(self.timeout_milliseconds())
886
self.timeout = datetime.timedelta(0, 0, 0, value)
887
# Emit D-Bus signal
888
self.PropertyChanged(dbus.String(u"timeout"),
889
dbus.UInt64(value, variant_level=1))
890
if getattr(self, u"disable_initiator_tag", None) is None:
891
return
892
# Reschedule timeout
893
gobject.source_remove(self.disable_initiator_tag)
894
self.disable_initiator_tag = None
895
time_to_die = (self.
896
_timedelta_to_milliseconds((self
897
.last_checked_ok
898
+ self.timeout)
899
- datetime.datetime
900
.utcnow()))
901
if time_to_die <= 0:
902
# The timeout has passed
903
self.disable()
904
else:
905
self.disable_initiator_tag = (gobject.timeout_add
906
(time_to_die, self.disable))
907
908
# interval - property
909
@dbus_service_property(_interface, signature=u"t",
910
access=u"readwrite")
911
def interval_dbus_property(self, value=None):
912
if value is None: # get
913
return dbus.UInt64(self.interval_milliseconds())
914
self.interval = datetime.timedelta(0, 0, 0, value)
915
# Emit D-Bus signal
916
self.PropertyChanged(dbus.String(u"interval"),
917
dbus.UInt64(value, variant_level=1))
918
if getattr(self, u"checker_initiator_tag", None) is None:
919
return
920
# Reschedule checker run
921
gobject.source_remove(self.checker_initiator_tag)
922
self.checker_initiator_tag = (gobject.timeout_add
923
(value, self.start_checker))
924
self.start_checker() # Start one now, too
925
926
# checker - property
927
@dbus_service_property(_interface, signature=u"s",
928
access=u"readwrite")
929
def checker_dbus_property(self, value=None):
930
if value is None: # get
931
return dbus.String(self.checker_command)
932
self.checker_command = value
933
# Emit D-Bus signal
934
self.PropertyChanged(dbus.String(u"checker"),
935
dbus.String(self.checker_command,
936
variant_level=1))
937
938
# checker_running - property
939
@dbus_service_property(_interface, signature=u"b",
940
access=u"readwrite")
941
def checker_running_dbus_property(self, value=None):
942
if value is None: # get
943
return dbus.Boolean(self.checker is not None)
944
if value:
945
self.start_checker()
946
else:
947
self.stop_checker()
948
949
# object_path - property
950
@dbus_service_property(_interface, signature=u"o", access=u"read")
951
def object_path_dbus_property(self):
952
return self.dbus_object_path # is already a dbus.ObjectPath
953
954
# secret = property
955
@dbus_service_property(_interface, signature=u"ay",
956
access=u"write", byte_arrays=True)
957
def secret_dbus_property(self, value):
958
self.secret = str(value)
959
960
del _interface
961
962
963
class ClientHandler(socketserver.BaseRequestHandler, object):
964
"""A class to handle client connections.
965
966
Instantiated once for each connection to handle it.
967
Note: This will run in its own forked process."""
968
969
def handle(self):
970
logger.info(u"TCP connection from: %s",
971
unicode(self.client_address))
972
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
973
# Open IPC pipe to parent process
974
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
975
session = (gnutls.connection
976
.ClientSession(self.request,
977
gnutls.connection
978
.X509Credentials()))
979
980
line = self.request.makefile().readline()
981
logger.debug(u"Protocol version: %r", line)
982
try:
983
if int(line.strip().split()[0]) > 1:
984
raise RuntimeError
985
except (ValueError, IndexError, RuntimeError), error:
986
logger.error(u"Unknown protocol version: %s", error)
987
return
988
989
# Note: gnutls.connection.X509Credentials is really a
990
# generic GnuTLS certificate credentials object so long as
991
# no X.509 keys are added to it. Therefore, we can use it
992
# here despite using OpenPGP certificates.
993
994
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
995
# u"+AES-256-CBC", u"+SHA1",
996
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
997
# u"+DHE-DSS"))
998
# Use a fallback default, since this MUST be set.
999
priority = self.server.gnutls_priority
1000
if priority is None:
1001
priority = u"NORMAL"
1002
(gnutls.library.functions
1003
.gnutls_priority_set_direct(session._c_object,
1004
priority, None))
1005
1006
try:
1007
session.handshake()
1008
except gnutls.errors.GNUTLSError, error:
1009
logger.warning(u"Handshake failed: %s", error)
1010
# Do not run session.bye() here: the session is not
1011
# established. Just abandon the request.
1012
return
1013
logger.debug(u"Handshake succeeded")
1014
try:
1015
fpr = self.fingerprint(self.peer_certificate(session))
1016
except (TypeError, gnutls.errors.GNUTLSError), error:
1017
logger.warning(u"Bad certificate: %s", error)
1018
session.bye()
1019
return
1020
logger.debug(u"Fingerprint: %s", fpr)
1021
1022
for c in self.server.clients:
1023
if c.fingerprint == fpr:
1024
client = c
1025
break
1026
else:
1027
ipc.write(u"NOTFOUND %s %s\n"
1028
% (fpr, unicode(self.client_address)))
1029
session.bye()
1030
return
1031
# Have to check if client.still_valid(), since it is
1032
# possible that the client timed out while establishing
1033
# the GnuTLS session.
1034
if not client.still_valid():
1035
ipc.write(u"INVALID %s\n" % client.name)
1036
session.bye()
1037
return
1038
ipc.write(u"SENDING %s\n" % client.name)
1039
sent_size = 0
1040
while sent_size < len(client.secret):
1041
sent = session.send(client.secret[sent_size:])
1042
logger.debug(u"Sent: %d, remaining: %d",
1043
sent, len(client.secret)
1044
- (sent_size + sent))
1045
sent_size += sent
1046
session.bye()
1047
1048
@staticmethod
1049
def peer_certificate(session):
1050
"Return the peer's OpenPGP certificate as a bytestring"
1051
# If not an OpenPGP certificate...
1052
if (gnutls.library.functions
1053
.gnutls_certificate_type_get(session._c_object)
1054
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1055
# ...do the normal thing
1056
return session.peer_certificate
1057
list_size = ctypes.c_uint(1)
1058
cert_list = (gnutls.library.functions
1059
.gnutls_certificate_get_peers
1060
(session._c_object, ctypes.byref(list_size)))
1061
if not bool(cert_list) and list_size.value != 0:
1062
raise gnutls.errors.GNUTLSError(u"error getting peer"
1063
u" certificate")
1064
if list_size.value == 0:
1065
return None
1066
cert = cert_list[0]
1067
return ctypes.string_at(cert.data, cert.size)
1068
1069
@staticmethod
1070
def fingerprint(openpgp):
1071
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1072
# New GnuTLS "datum" with the OpenPGP public key
1073
datum = (gnutls.library.types
1074
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1075
ctypes.POINTER
1076
(ctypes.c_ubyte)),
1077
ctypes.c_uint(len(openpgp))))
1078
# New empty GnuTLS certificate
1079
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1080
(gnutls.library.functions
1081
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1082
# Import the OpenPGP public key into the certificate
1083
(gnutls.library.functions
1084
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1085
gnutls.library.constants
1086
.GNUTLS_OPENPGP_FMT_RAW))
1087
# Verify the self signature in the key
1088
crtverify = ctypes.c_uint()
1089
(gnutls.library.functions
1090
.gnutls_openpgp_crt_verify_self(crt, 0,
1091
ctypes.byref(crtverify)))
1092
if crtverify.value != 0:
1093
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1094
raise (gnutls.errors.CertificateSecurityError
1095
(u"Verify failed"))
1096
# New buffer for the fingerprint
1097
buf = ctypes.create_string_buffer(20)
1098
buf_len = ctypes.c_size_t()
1099
# Get the fingerprint from the certificate into the buffer
1100
(gnutls.library.functions
1101
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1102
ctypes.byref(buf_len)))
1103
# Deinit the certificate
1104
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1105
# Convert the buffer to a Python bytestring
1106
fpr = ctypes.string_at(buf, buf_len.value)
1107
# Convert the bytestring to hexadecimal notation
1108
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1109
return hex_fpr
1110
1111
1112
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1113
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1114
def process_request(self, request, client_address):
1115
"""Overrides and wraps the original process_request().
1116
1117
This function creates a new pipe in self.pipe
1118
"""
1119
self.pipe = os.pipe()
1120
super(ForkingMixInWithPipe,
1121
self).process_request(request, client_address)
1122
os.close(self.pipe[1]) # close write end
1123
self.add_pipe(self.pipe[0])
1124
def add_pipe(self, pipe):
1125
"""Dummy function; override as necessary"""
1126
os.close(pipe)
1127
1128
1129
class IPv6_TCPServer(ForkingMixInWithPipe,
1130
socketserver.TCPServer, object):
1131
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1132
1133
Attributes:
1134
enabled: Boolean; whether this server is activated yet
1135
interface: None or a network interface name (string)
1136
use_ipv6: Boolean; to use IPv6 or not
1137
"""
1138
def __init__(self, server_address, RequestHandlerClass,
1139
interface=None, use_ipv6=True):
1140
self.interface = interface
1141
if use_ipv6:
1142
self.address_family = socket.AF_INET6
1143
socketserver.TCPServer.__init__(self, server_address,
1144
RequestHandlerClass)
1145
def server_bind(self):
1146
"""This overrides the normal server_bind() function
1147
to bind to an interface if one was specified, and also NOT to
1148
bind to an address or port if they were not specified."""
1149
if self.interface is not None:
1150
if SO_BINDTODEVICE is None:
1151
logger.error(u"SO_BINDTODEVICE does not exist;"
1152
u" cannot bind to interface %s",
1153
self.interface)
1154
else:
21
self.dn = dn
22
if password:
23
self.password = password
24
elif passfile:
25
self.password = open(passfile).readall()
26
else:
27
print "No Password or Passfile in client config file"
28
# raise RuntimeError XXX
29
self.password = "gazonk"
30
self.fqdn = fqdn
31
self.created = datetime.datetime.now()
32
self.last_seen = None
33
if timeout is None:
34
timeout = options.timeout
35
self.timeout = timeout
36
if interval == -1:
37
interval = options.interval
38
self.interval = interval
39
self.next_check = datetime.datetime.now()
40
41
42
class server_metaclass(type):
43
"Common behavior for the UDP and TCP server classes"
44
def __new__(cls, name, bases, attrs):
45
attrs["address_family"] = socket.AF_INET6
46
attrs["allow_reuse_address"] = True
47
def server_bind(self):
48
if self.options.interface:
49
if not hasattr(socket, "SO_BINDTODEVICE"):
50
# From /usr/include/asm-i486/socket.h
51
socket.SO_BINDTODEVICE = 25
1155
52
try:
1156
53
self.socket.setsockopt(socket.SOL_SOCKET,
1157
SO_BINDTODEVICE,
1158
str(self.interface
1159
+ u'\0'))
54
socket.SO_BINDTODEVICE,
55
self.options.interface)
1160
56
except socket.error, error:
1161
57
if error[0] == errno.EPERM:
1162
logger.error(u"No permission to"
1163
u" bind to interface %s",
1164
self.interface)
1165
elif error[0] == errno.ENOPROTOOPT:
1166
logger.error(u"SO_BINDTODEVICE not available;"
1167
u" cannot bind to interface %s",
1168
self.interface)
58
print "Warning: No permission to bind to interface", \
59
self.options.interface
1169
60
else:
1170
raise
1171
# Only bind(2) the socket if we really need to.
1172
if self.server_address[0] or self.server_address[1]:
1173
if not self.server_address[0]:
1174
if self.address_family == socket.AF_INET6:
1175
any_address = u"::" # in6addr_any
1176
else:
1177
any_address = socket.INADDR_ANY
1178
self.server_address = (any_address,
1179
self.server_address[1])
1180
elif not self.server_address[1]:
1181
self.server_address = (self.server_address[0],
1182
0)
1183
# if self.interface:
1184
# self.server_address = (self.server_address[0],
1185
# 0, # port
1186
# 0, # flowinfo
1187
# if_nametoindex
1188
# (self.interface))
1189
return socketserver.TCPServer.server_bind(self)
1190
1191
1192
class MandosServer(IPv6_TCPServer):
1193
"""Mandos server.
1194
1195
Attributes:
1196
clients: set of Client objects
1197
gnutls_priority GnuTLS priority string
1198
use_dbus: Boolean; to emit D-Bus signals or not
1199
1200
Assumes a gobject.MainLoop event loop.
1201
"""
1202
def __init__(self, server_address, RequestHandlerClass,
1203
interface=None, use_ipv6=True, clients=None,
1204
gnutls_priority=None, use_dbus=True):
1205
self.enabled = False
1206
self.clients = clients
1207
if self.clients is None:
1208
self.clients = set()
1209
self.use_dbus = use_dbus
1210
self.gnutls_priority = gnutls_priority
1211
IPv6_TCPServer.__init__(self, server_address,
1212
RequestHandlerClass,
1213
interface = interface,
1214
use_ipv6 = use_ipv6)
1215
def server_activate(self):
1216
if self.enabled:
1217
return socketserver.TCPServer.server_activate(self)
1218
def enable(self):
1219
self.enabled = True
1220
def add_pipe(self, pipe):
1221
# Call "handle_ipc" for both data and EOF events
1222
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1223
self.handle_ipc)
1224
def handle_ipc(self, source, condition, file_objects={}):
1225
condition_names = {
1226
gobject.IO_IN: u"IN", # There is data to read.
1227
gobject.IO_OUT: u"OUT", # Data can be written (without
1228
# blocking).
1229
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1230
gobject.IO_ERR: u"ERR", # Error condition.
1231
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1232
# broken, usually for pipes and
1233
# sockets).
1234
}
1235
conditions_string = ' | '.join(name
1236
for cond, name in
1237
condition_names.iteritems()
1238
if cond & condition)
1239
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1240
conditions_string)
1241
1242
# Turn the pipe file descriptor into a Python file object
1243
if source not in file_objects:
1244
file_objects[source] = os.fdopen(source, u"r", 1)
1245
1246
# Read a line from the file object
1247
cmdline = file_objects[source].readline()
1248
if not cmdline: # Empty line means end of file
1249
# close the IPC pipe
1250
file_objects[source].close()
1251
del file_objects[source]
1252
1253
# Stop calling this function
1254
return False
1255
1256
logger.debug(u"IPC command: %r", cmdline)
1257
1258
# Parse and act on command
1259
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1260
1261
if cmd == u"NOTFOUND":
1262
logger.warning(u"Client not found for fingerprint: %s",
1263
args)
1264
if self.use_dbus:
1265
# Emit D-Bus signal
1266
mandos_dbus_service.ClientNotFound(args)
1267
elif cmd == u"INVALID":
1268
for client in self.clients:
1269
if client.name == args:
1270
logger.warning(u"Client %s is invalid", args)
1271
if self.use_dbus:
1272
# Emit D-Bus signal
1273
client.Rejected()
1274
break
1275
else:
1276
logger.error(u"Unknown client %s is invalid", args)
1277
elif cmd == u"SENDING":
1278
for client in self.clients:
1279
if client.name == args:
1280
logger.info(u"Sending secret to %s", client.name)
1281
client.checked_ok()
1282
if self.use_dbus:
1283
# Emit D-Bus signal
1284
client.ReceivedSecret()
1285
break
1286
else:
1287
logger.error(u"Sending secret to unknown client %s",
1288
args)
1289
else:
1290
logger.error(u"Unknown IPC command: %r", cmdline)
1291
1292
# Keep calling this function
1293
return True
1294
61
raise error
62
return super(type(self), self).server_bind()
63
attrs["server_bind"] = server_bind
64
def init(self, *args, **kwargs):
65
if "options" in kwargs:
66
self.options = kwargs["options"]
67
del kwargs["options"]
68
if "clients" in kwargs:
69
self.clients = kwargs["clients"]
70
del kwargs["clients"]
71
if "credentials" in kwargs:
72
self.credentials = kwargs["credentials"]
73
del kwargs["credentials"]
74
return super(type(self), self).__init__(*args, **kwargs)
75
attrs["__init__"] = init
76
return type.__new__(cls, name, bases, attrs)
77
78
79
class udp_handler(SocketServer.DatagramRequestHandler, object):
80
def handle(self):
81
self.wfile.write("Polo")
82
print "UDP request answered"
83
84
85
class IPv6_UDPServer(SocketServer.UDPServer, object):
86
__metaclass__ = server_metaclass
87
def verify_request(self, request, client_address):
88
print "UDP request came"
89
return request[0] == "Marco"
90
91
92
class tcp_handler(SocketServer.BaseRequestHandler, object):
93
def handle(self):
94
print "TCP request came"
95
print "Request:", self.request
96
print "Client Address:", self.client_address
97
print "Server:", self.server
98
session = gnutls.connection.ServerSession(self.request,
99
self.server.credentials)
100
session.handshake()
101
if session.peer_certificate:
102
print "DN:", session.peer_certificate.subject
103
try:
104
session.verify_peer()
105
except gnutls.errors.CertificateError, error:
106
print "Verify failed", error
107
session.bye()
108
return
109
try:
110
session.send(dict((client.dn, client.password)
111
for client in self.server.clients)
112
[session.peer_certificate.subject])
113
except KeyError:
114
session.send("gazonk")
115
# Log maybe? XXX
116
session.bye()
117
118
119
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
120
__metaclass__ = server_metaclass
121
request_queue_size = 1024
122
123
124
in6addr_any = "::"
125
126
cred = None
1295
127
1296
128
def string_to_delta(interval):
1297
129
"""Parse a string and return a datetime.timedelta
1298
1299
>>> string_to_delta(u'7d')
130
131
>>> string_to_delta('7d')
1300
132
datetime.timedelta(7)
1301
>>> string_to_delta(u'60s')
133
>>> string_to_delta('60s')
1302
134
datetime.timedelta(0, 60)
1303
>>> string_to_delta(u'60m')
135
>>> string_to_delta('60m')
1304
136
datetime.timedelta(0, 3600)
1305
>>> string_to_delta(u'24h')
137
>>> string_to_delta('24h')
1306
138
datetime.timedelta(1)
1307
139
>>> string_to_delta(u'1w')
1308
140
datetime.timedelta(7)
1309
>>> string_to_delta(u'5m 30s')
1310
datetime.timedelta(0, 330)
1311
141
"""
1312
timevalue = datetime.timedelta(0)
1313
for s in interval.split():
1314
try:
1315
suffix = unicode(s[-1])
1316
value = int(s[:-1])
1317
if suffix == u"d":
1318
delta = datetime.timedelta(value)
1319
elif suffix == u"s":
1320
delta = datetime.timedelta(0, value)
1321
elif suffix == u"m":
1322
delta = datetime.timedelta(0, 0, 0, 0, value)
1323
elif suffix == u"h":
1324
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1325
elif suffix == u"w":
1326
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1327
else:
1328
raise ValueError
1329
except (ValueError, IndexError):
142
try:
143
suffix=unicode(interval[-1])
144
value=int(interval[:-1])
145
if suffix == u"d":
146
delta = datetime.timedelta(value)
147
elif suffix == u"s":
148
delta = datetime.timedelta(0, value)
149
elif suffix == u"m":
150
delta = datetime.timedelta(0, 0, 0, 0, value)
151
elif suffix == u"h":
152
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
153
elif suffix == u"w":
154
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
155
else:
1330
156
raise ValueError
1331
timevalue += delta
1332
return timevalue
1333
1334
1335
def if_nametoindex(interface):
1336
"""Call the C function if_nametoindex(), or equivalent
1337
1338
Note: This function cannot accept a unicode string."""
1339
global if_nametoindex
1340
try:
1341
if_nametoindex = (ctypes.cdll.LoadLibrary
1342
(ctypes.util.find_library(u"c"))
1343
.if_nametoindex)
1344
except (OSError, AttributeError):
1345
logger.warning(u"Doing if_nametoindex the hard way")
1346
def if_nametoindex(interface):
1347
"Get an interface index the hard way, i.e. using fcntl()"
1348
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1349
with closing(socket.socket()) as s:
1350
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1351
struct.pack(str(u"16s16x"),
1352
interface))
1353
interface_index = struct.unpack(str(u"I"),
1354
ifreq[16:20])[0]
1355
return interface_index
1356
return if_nametoindex(interface)
1357
1358
1359
def daemon(nochdir = False, noclose = False):
1360
"""See daemon(3). Standard BSD Unix function.
1361
1362
This should really exist as os.daemon, but it doesn't (yet)."""
1363
if os.fork():
1364
sys.exit()
1365
os.setsid()
1366
if not nochdir:
1367
os.chdir(u"/")
1368
if os.fork():
1369
sys.exit()
1370
if not noclose:
1371
# Close all standard open file descriptors
1372
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1373
if not stat.S_ISCHR(os.fstat(null).st_mode):
1374
raise OSError(errno.ENODEV,
1375
u"/dev/null not a character device")
1376
os.dup2(null, sys.stdin.fileno())
1377
os.dup2(null, sys.stdout.fileno())
1378
os.dup2(null, sys.stderr.fileno())
1379
if null > 2:
1380
os.close(null)
1381
157
except (ValueError, IndexError):
158
raise ValueError
159
return delta
1382
160
1383
161
def main():
1384
1385
##################################################################
1386
# Parsing of options, both command line and config file
1387
1388
parser = optparse.OptionParser(version = "%%prog %s" % version)
1389
parser.add_option("-i", u"--interface", type=u"string",
1390
metavar="IF", help=u"Bind to interface IF")
1391
parser.add_option("-a", u"--address", type=u"string",
1392
help=u"Address to listen for requests on")
1393
parser.add_option("-p", u"--port", type=u"int",
1394
help=u"Port number to receive requests on")
1395
parser.add_option("--check", action=u"store_true",
1396
help=u"Run self-test")
1397
parser.add_option("--debug", action=u"store_true",
1398
help=u"Debug mode; run in foreground and log to"
1399
u" terminal")
1400
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1401
u" priority string (see GnuTLS documentation)")
1402
parser.add_option("--servicename", type=u"string",
1403
metavar=u"NAME", help=u"Zeroconf service name")
1404
parser.add_option("--configdir", type=u"string",
1405
default=u"/etc/mandos", metavar=u"DIR",
1406
help=u"Directory to search for configuration"
1407
u" files")
1408
parser.add_option("--no-dbus", action=u"store_false",
1409
dest=u"use_dbus", help=u"Do not provide D-Bus"
1410
u" system bus interface")
1411
parser.add_option("--no-ipv6", action=u"store_false",
1412
dest=u"use_ipv6", help=u"Do not use IPv6")
1413
options = parser.parse_args()[0]
1414
162
parser = OptionParser()
163
parser.add_option("-i", "--interface", type="string",
164
default="eth0", metavar="IF",
165
help="Interface to bind to")
166
parser.add_option("--cert", type="string", default="cert.pem",
167
metavar="FILE",
168
help="Public key certificate to use")
169
parser.add_option("--key", type="string", default="key.pem",
170
metavar="FILE",
171
help="Private key to use")
172
parser.add_option("--ca", type="string", default="ca.pem",
173
metavar="FILE",
174
help="Certificate Authority certificate to use")
175
parser.add_option("--crl", type="string", default="crl.pem",
176
metavar="FILE",
177
help="Certificate Revokation List to use")
178
parser.add_option("-p", "--port", type="int", default=49001,
179
help="Port number to receive requests on")
180
parser.add_option("--dh", type="int", metavar="BITS",
181
help="DH group to use")
182
parser.add_option("-t", "--timeout", type="string", # Parsed later
183
default="15m",
184
help="Amount of downtime allowed for clients")
185
parser.add_option("--interval", type="string", # Parsed later
186
default="5m",
187
help="How often to check that a client is up")
188
parser.add_option("--check", action="store_true", default=False,
189
help="Run self-test")
190
(options, args) = parser.parse_args()
191
1415
192
if options.check:
1416
193
import doctest
1417
194
doctest.testmod()
1418
195
sys.exit()
1419
196
1420
# Default values for config file for server-global settings
1421
server_defaults = { u"interface": u"",
1422
u"address": u"",
1423
u"port": u"",
1424
u"debug": u"False",
1425
u"priority":
1426
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1427
u"servicename": u"Mandos",
1428
u"use_dbus": u"True",
1429
u"use_ipv6": u"True",
1430
}
1431
1432
# Parse config file for server-global settings
1433
server_config = configparser.SafeConfigParser(server_defaults)
1434
del server_defaults
1435
server_config.read(os.path.join(options.configdir,
1436
u"mandos.conf"))
1437
# Convert the SafeConfigParser object to a dict
1438
server_settings = server_config.defaults()
1439
# Use the appropriate methods on the non-string config options
1440
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1441
server_settings[option] = server_config.getboolean(u"DEFAULT",
1442
option)
1443
if server_settings["port"]:
1444
server_settings["port"] = server_config.getint(u"DEFAULT",
1445
u"port")
1446
del server_config
1447
1448
# Override the settings from the config file with command line
1449
# options, if set.
1450
for option in (u"interface", u"address", u"port", u"debug",
1451
u"priority", u"servicename", u"configdir",
1452
u"use_dbus", u"use_ipv6"):
1453
value = getattr(options, option)
1454
if value is not None:
1455
server_settings[option] = value
1456
del options
1457
# Force all strings to be unicode
1458
for option in server_settings.keys():
1459
if type(server_settings[option]) is str:
1460
server_settings[option] = unicode(server_settings[option])
1461
# Now we have our good server settings in "server_settings"
1462
1463
##################################################################
1464
1465
# For convenience
1466
debug = server_settings[u"debug"]
1467
use_dbus = server_settings[u"use_dbus"]
1468
use_ipv6 = server_settings[u"use_ipv6"]
1469
1470
if not debug:
1471
syslogger.setLevel(logging.WARNING)
1472
console.setLevel(logging.WARNING)
1473
1474
if server_settings[u"servicename"] != u"Mandos":
1475
syslogger.setFormatter(logging.Formatter
1476
(u'Mandos (%s) [%%(process)d]:'
1477
u' %%(levelname)s: %%(message)s'
1478
% server_settings[u"servicename"]))
1479
1480
# Parse config file with clients
1481
client_defaults = { u"timeout": u"1h",
1482
u"interval": u"5m",
1483
u"checker": u"fping -q -- %%(host)s",
1484
u"host": u"",
1485
}
1486
client_config = configparser.SafeConfigParser(client_defaults)
1487
client_config.read(os.path.join(server_settings[u"configdir"],
1488
u"clients.conf"))
1489
1490
global mandos_dbus_service
1491
mandos_dbus_service = None
1492
1493
tcp_server = MandosServer((server_settings[u"address"],
1494
server_settings[u"port"]),
1495
ClientHandler,
1496
interface=server_settings[u"interface"],
1497
use_ipv6=use_ipv6,
1498
gnutls_priority=
1499
server_settings[u"priority"],
1500
use_dbus=use_dbus)
1501
pidfilename = u"/var/run/mandos.pid"
1502
try:
1503
pidfile = open(pidfilename, u"w")
1504
except IOError:
1505
logger.error(u"Could not open file %r", pidfilename)
1506
1507
try:
1508
uid = pwd.getpwnam(u"_mandos").pw_uid
1509
gid = pwd.getpwnam(u"_mandos").pw_gid
1510
except KeyError:
1511
try:
1512
uid = pwd.getpwnam(u"mandos").pw_uid
1513
gid = pwd.getpwnam(u"mandos").pw_gid
1514
except KeyError:
1515
try:
1516
uid = pwd.getpwnam(u"nobody").pw_uid
1517
gid = pwd.getpwnam(u"nobody").pw_gid
1518
except KeyError:
1519
uid = 65534
1520
gid = 65534
1521
try:
1522
os.setgid(gid)
1523
os.setuid(uid)
1524
except OSError, error:
1525
if error[0] != errno.EPERM:
1526
raise error
1527
1528
# Enable all possible GnuTLS debugging
1529
if debug:
1530
# "Use a log level over 10 to enable all debugging options."
1531
# - GnuTLS manual
1532
gnutls.library.functions.gnutls_global_set_log_level(11)
1533
1534
@gnutls.library.types.gnutls_log_func
1535
def debug_gnutls(level, string):
1536
logger.debug(u"GnuTLS: %s", string[:-1])
1537
1538
(gnutls.library.functions
1539
.gnutls_global_set_log_function(debug_gnutls))
1540
1541
global main_loop
1542
# From the Avahi example code
1543
DBusGMainLoop(set_as_default=True )
1544
main_loop = gobject.MainLoop()
1545
bus = dbus.SystemBus()
1546
# End of Avahi example code
1547
if use_dbus:
1548
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1549
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1550
service = AvahiService(name = server_settings[u"servicename"],
1551
servicetype = u"_mandos._tcp",
1552
protocol = protocol, bus = bus)
1553
if server_settings["interface"]:
1554
service.interface = (if_nametoindex
1555
(str(server_settings[u"interface"])))
1556
1557
client_class = Client
1558
if use_dbus:
1559
client_class = functools.partial(ClientDBus, bus = bus)
1560
tcp_server.clients.update(set(
1561
client_class(name = section,
1562
config= dict(client_config.items(section)))
1563
for section in client_config.sections()))
1564
if not tcp_server.clients:
1565
logger.warning(u"No clients defined")
1566
1567
if debug:
1568
# Redirect stdin so all checkers get /dev/null
1569
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1570
os.dup2(null, sys.stdin.fileno())
1571
if null > 2:
1572
os.close(null)
1573
else:
1574
# No console logging
1575
logger.removeHandler(console)
1576
# Close all input and output, do double fork, etc.
1577
daemon()
1578
1579
try:
1580
with closing(pidfile):
1581
pid = os.getpid()
1582
pidfile.write(str(pid) + "\n")
1583
del pidfile
1584
except IOError:
1585
logger.error(u"Could not write to file %r with PID %d",
1586
pidfilename, pid)
1587
except NameError:
1588
# "pidfile" was never created
1589
pass
1590
del pidfilename
1591
1592
def cleanup():
1593
"Cleanup function; run on exit"
1594
service.cleanup()
1595
1596
while tcp_server.clients:
1597
client = tcp_server.clients.pop()
1598
client.disable_hook = None
1599
client.disable()
1600
1601
atexit.register(cleanup)
1602
1603
if not debug:
1604
signal.signal(signal.SIGINT, signal.SIG_IGN)
1605
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1606
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1607
1608
if use_dbus:
1609
class MandosDBusService(dbus.service.Object):
1610
"""A D-Bus proxy object"""
1611
def __init__(self):
1612
dbus.service.Object.__init__(self, bus, u"/")
1613
_interface = u"se.bsnet.fukt.Mandos"
1614
1615
@dbus.service.signal(_interface, signature=u"oa{sv}")
1616
def ClientAdded(self, objpath, properties):
1617
"D-Bus signal"
1618
pass
1619
1620
@dbus.service.signal(_interface, signature=u"s")
1621
def ClientNotFound(self, fingerprint):
1622
"D-Bus signal"
1623
pass
1624
1625
@dbus.service.signal(_interface, signature=u"os")
1626
def ClientRemoved(self, objpath, name):
1627
"D-Bus signal"
1628
pass
1629
1630
@dbus.service.method(_interface, out_signature=u"ao")
1631
def GetAllClients(self):
1632
"D-Bus method"
1633
return dbus.Array(c.dbus_object_path
1634
for c in tcp_server.clients)
1635
1636
@dbus.service.method(_interface,
1637
out_signature=u"a{oa{sv}}")
1638
def GetAllClientsWithProperties(self):
1639
"D-Bus method"
1640
return dbus.Dictionary(
1641
((c.dbus_object_path, c.GetAll(u""))
1642
for c in tcp_server.clients),
1643
signature=u"oa{sv}")
1644
1645
@dbus.service.method(_interface, in_signature=u"o")
1646
def RemoveClient(self, object_path):
1647
"D-Bus method"
1648
for c in tcp_server.clients:
1649
if c.dbus_object_path == object_path:
1650
tcp_server.clients.remove(c)
1651
c.remove_from_connection()
1652
# Don't signal anything except ClientRemoved
1653
c.disable(signal=False)
1654
# Emit D-Bus signal
1655
self.ClientRemoved(object_path, c.name)
1656
return
1657
raise KeyError
1658
1659
del _interface
1660
1661
mandos_dbus_service = MandosDBusService()
1662
1663
for client in tcp_server.clients:
1664
if use_dbus:
1665
# Emit D-Bus signal
1666
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1667
client.GetAll(u""))
1668
client.enable()
1669
1670
tcp_server.enable()
1671
tcp_server.server_activate()
1672
1673
# Find out what port we got
1674
service.port = tcp_server.socket.getsockname()[1]
1675
if use_ipv6:
1676
logger.info(u"Now listening on address %r, port %d,"
1677
" flowinfo %d, scope_id %d"
1678
% tcp_server.socket.getsockname())
1679
else: # IPv4
1680
logger.info(u"Now listening on address %r, port %d"
1681
% tcp_server.socket.getsockname())
1682
1683
#service.interface = tcp_server.socket.getsockname()[3]
1684
1685
try:
1686
# From the Avahi example code
1687
try:
1688
service.activate()
1689
except dbus.exceptions.DBusException, error:
1690
logger.critical(u"DBusException: %s", error)
1691
sys.exit(1)
1692
# End of Avahi example code
1693
1694
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1695
lambda *args, **kwargs:
1696
(tcp_server.handle_request
1697
(*args[2:], **kwargs) or True))
1698
1699
logger.debug(u"Starting main loop")
1700
main_loop.run()
1701
except AvahiError, error:
1702
logger.critical(u"AvahiError: %s", error)
1703
sys.exit(1)
1704
except KeyboardInterrupt:
1705
if debug:
1706
print >> sys.stderr
1707
logger.debug(u"Server received KeyboardInterrupt")
1708
logger.debug(u"Server exiting")
1709
1710
if __name__ == '__main__':
197
# Parse the time arguments
198
try:
199
options.timeout = string_to_delta(options.timeout)
200
except ValueError:
201
parser.error("option --timeout: Unparseable time")
202
203
try:
204
options.interval = string_to_delta(options.interval)
205
except ValueError:
206
parser.error("option --interval: Unparseable time")
207
208
cert = gnutls.crypto.X509Certificate(open(options.cert).read())
209
key = gnutls.crypto.X509PrivateKey(open(options.key).read())
210
ca = gnutls.crypto.X509Certificate(open(options.ca).read())
211
crl = gnutls.crypto.X509CRL(open(options.crl).read())
212
cred = gnutls.connection.X509Credentials(cert, key, [ca], [crl])
213
214
# Parse config file
215
defaults = {}
216
client_config_object = ConfigParser.SafeConfigParser(defaults)
217
client_config_object.read("mandos-clients.conf")
218
clients = [Client(name=section, options=options,
219
**(dict(client_config_object.items(section))))
220
for section in client_config_object.sections()]
221
222
udp_server = IPv6_UDPServer((in6addr_any, options.port),
223
udp_handler,
224
options=options)
225
226
tcp_server = IPv6_TCPServer((in6addr_any, options.port),
227
tcp_handler,
228
options=options,
229
clients=clients,
230
credentials=cred)
231
232
while True:
233
in_, out, err = select.select((udp_server,
234
tcp_server), (), ())
235
for server in in_:
236
server.handle_request()
237
238
239
if __name__ == "__main__":
1711
240
main()
241
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0