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- Committer: Teddy Hogeborn
- Date: 2007-12-19 07:58:13 UTC
- Revision ID: teddy@fukt.bsnet.se-20071219075813-5u1w3gujvttj83qs
* server.py (Client.created, Client.next_check): New.
(string_to_delta): New.
(main): New options "--check" and "--interval". Use string_to_delta to
parse arguments to "--timeout" and "--interval".
(string_to_delta): New.
(main): New options "--check" and "--interval". Use string_to_delta to
parse arguments to "--timeout" and "--interval".
- 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 = "1.0.14"
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
229
14
230
15
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."""
16
def __init__(self, name=None, dn=None, password=None,
17
passfile=None, fqdn=None, timeout=None,
18
interval=-1):
280
19
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"])),
296
"rb")) as secfile:
297
self.secret = secfile.read()
20
self.dn = dn
21
if password:
22
self.password = password
23
elif passfile:
24
self.password = open(passfile).readall()
298
25
else:
299
raise TypeError(u"No secret or secfile for client %s"
300
% self.name)
301
self.host = config.get(u"host", u"")
302
self.created = datetime.datetime.utcnow()
303
self.enabled = False
304
self.last_enabled = None
305
self.last_checked_ok = None
306
self.timeout = string_to_delta(config[u"timeout"])
307
self.interval = string_to_delta(config[u"interval"])
308
self.disable_hook = disable_hook
309
self.checker = None
310
self.checker_initiator_tag = None
311
self.disable_initiator_tag = None
312
self.checker_callback_tag = None
313
self.checker_command = config[u"checker"]
314
self.current_checker_command = None
315
self.last_connect = None
316
317
def enable(self):
318
"""Start this client's checker and timeout hooks"""
319
if getattr(self, u"enabled", False):
320
# Already enabled
321
return
322
self.last_enabled = datetime.datetime.utcnow()
323
# Schedule a new checker to be started an 'interval' from now,
324
# and every interval from then on.
325
self.checker_initiator_tag = (gobject.timeout_add
326
(self.interval_milliseconds(),
327
self.start_checker))
328
# Schedule a disable() when 'timeout' has passed
329
self.disable_initiator_tag = (gobject.timeout_add
330
(self.timeout_milliseconds(),
331
self.disable))
332
self.enabled = True
333
# Also start a new checker *right now*.
334
self.start_checker()
335
336
def disable(self, quiet=True):
337
"""Disable this client."""
338
if not getattr(self, "enabled", False):
339
return False
340
if not quiet:
341
logger.info(u"Disabling client %s", self.name)
342
if getattr(self, u"disable_initiator_tag", False):
343
gobject.source_remove(self.disable_initiator_tag)
344
self.disable_initiator_tag = None
345
if getattr(self, u"checker_initiator_tag", False):
346
gobject.source_remove(self.checker_initiator_tag)
347
self.checker_initiator_tag = None
348
self.stop_checker()
349
if self.disable_hook:
350
self.disable_hook(self)
351
self.enabled = False
352
# Do not run this again if called by a gobject.timeout_add
353
return False
354
355
def __del__(self):
356
self.disable_hook = None
357
self.disable()
358
359
def checker_callback(self, pid, condition, command):
360
"""The checker has completed, so take appropriate actions."""
361
self.checker_callback_tag = None
362
self.checker = None
363
if os.WIFEXITED(condition):
364
exitstatus = os.WEXITSTATUS(condition)
365
if exitstatus == 0:
366
logger.info(u"Checker for %(name)s succeeded",
367
vars(self))
368
self.checked_ok()
26
print "No Password or Passfile in client config file"
27
# raise RuntimeError XXX
28
self.password = "gazonk"
29
self.fqdn = fqdn
30
self.created = datetime.datetime.now()
31
self.last_seen = None
32
if timeout is None:
33
timeout = self.server.options.timeout
34
self.timeout = timeout
35
if interval == -1:
36
interval = self.server.options.interval
37
self.interval = interval
38
self.next_check = datetime.datetime.now()
39
40
def server_bind(self):
41
if self.options.interface:
42
if not hasattr(socket, "SO_BINDTODEVICE"):
43
# From /usr/include/asm-i486/socket.h
44
socket.SO_BINDTODEVICE = 25
45
try:
46
self.socket.setsockopt(socket.SOL_SOCKET,
47
socket.SO_BINDTODEVICE,
48
self.options.interface)
49
except socket.error, error:
50
if error[0] == errno.EPERM:
51
print "Warning: Denied permission to bind to interface", \
52
self.options.interface
369
53
else:
370
logger.info(u"Checker for %(name)s failed",
371
vars(self))
372
else:
373
logger.warning(u"Checker for %(name)s crashed?",
374
vars(self))
375
376
def checked_ok(self):
377
"""Bump up the timeout for this client.
378
379
This should only be called when the client has been seen,
380
alive and well.
381
"""
382
self.last_checked_ok = datetime.datetime.utcnow()
383
gobject.source_remove(self.disable_initiator_tag)
384
self.disable_initiator_tag = (gobject.timeout_add
385
(self.timeout_milliseconds(),
386
self.disable))
387
388
def start_checker(self):
389
"""Start a new checker subprocess if one is not running.
390
391
If a checker already exists, leave it running and do
392
nothing."""
393
# The reason for not killing a running checker is that if we
394
# did that, then if a checker (for some reason) started
395
# running slowly and taking more than 'interval' time, the
396
# client would inevitably timeout, since no checker would get
397
# a chance to run to completion. If we instead leave running
398
# checkers alone, the checker would have to take more time
399
# than 'timeout' for the client to be declared invalid, which
400
# is as it should be.
401
402
# If a checker exists, make sure it is not a zombie
403
try:
404
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
405
except (AttributeError, OSError), error:
406
if (isinstance(error, OSError)
407
and error.errno != errno.ECHILD):
408
54
raise error
409
else:
410
if pid:
411
logger.warning(u"Checker was a zombie")
412
gobject.source_remove(self.checker_callback_tag)
413
self.checker_callback(pid, status,
414
self.current_checker_command)
415
# Start a new checker if needed
416
if self.checker is None:
417
try:
418
# In case checker_command has exactly one % operator
419
command = self.checker_command % self.host
420
except TypeError:
421
# Escape attributes for the shell
422
escaped_attrs = dict((key,
423
re.escape(unicode(str(val),
424
errors=
425
u'replace')))
426
for key, val in
427
vars(self).iteritems())
428
try:
429
command = self.checker_command % escaped_attrs
430
except TypeError, error:
431
logger.error(u'Could not format string "%s":'
432
u' %s', self.checker_command, error)
433
return True # Try again later
434
self.current_checker_command = command
435
try:
436
logger.info(u"Starting checker %r for %s",
437
command, self.name)
438
# We don't need to redirect stdout and stderr, since
439
# in normal mode, that is already done by daemon(),
440
# and in debug mode we don't want to. (Stdin is
441
# always replaced by /dev/null.)
442
self.checker = subprocess.Popen(command,
443
close_fds=True,
444
shell=True, cwd=u"/")
445
self.checker_callback_tag = (gobject.child_watch_add
446
(self.checker.pid,
447
self.checker_callback,
448
data=command))
449
# The checker may have completed before the gobject
450
# watch was added. Check for this.
451
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
452
if pid:
453
gobject.source_remove(self.checker_callback_tag)
454
self.checker_callback(pid, status, command)
455
except OSError, error:
456
logger.error(u"Failed to start subprocess: %s",
457
error)
458
# Re-run this periodically if run by gobject.timeout_add
459
return True
460
461
def stop_checker(self):
462
"""Force the checker process, if any, to stop."""
463
if self.checker_callback_tag:
464
gobject.source_remove(self.checker_callback_tag)
465
self.checker_callback_tag = None
466
if getattr(self, u"checker", None) is None:
467
return
468
logger.debug(u"Stopping checker for %(name)s", vars(self))
469
try:
470
os.kill(self.checker.pid, signal.SIGTERM)
471
#time.sleep(0.5)
472
#if self.checker.poll() is None:
473
# os.kill(self.checker.pid, signal.SIGKILL)
474
except OSError, error:
475
if error.errno != errno.ESRCH: # No such process
476
raise
477
self.checker = None
478
479
def still_valid(self):
480
"""Has the timeout not yet passed for this client?"""
481
if not getattr(self, u"enabled", False):
482
return False
483
now = datetime.datetime.utcnow()
484
if self.last_checked_ok is None:
485
return now < (self.created + self.timeout)
486
else:
487
return now < (self.last_checked_ok + self.timeout)
488
489
490
def dbus_service_property(dbus_interface, signature=u"v",
491
access=u"readwrite", byte_arrays=False):
492
"""Decorators for marking methods of a DBusObjectWithProperties to
493
become properties on the D-Bus.
494
495
The decorated method will be called with no arguments by "Get"
496
and with one argument by "Set".
497
498
The parameters, where they are supported, are the same as
499
dbus.service.method, except there is only "signature", since the
500
type from Get() and the type sent to Set() is the same.
501
"""
502
def decorator(func):
503
func._dbus_is_property = True
504
func._dbus_interface = dbus_interface
505
func._dbus_signature = signature
506
func._dbus_access = access
507
func._dbus_name = func.__name__
508
if func._dbus_name.endswith(u"_dbus_property"):
509
func._dbus_name = func._dbus_name[:-14]
510
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
511
return func
512
return decorator
513
514
515
class DBusPropertyException(dbus.exceptions.DBusException):
516
"""A base class for D-Bus property-related exceptions
517
"""
518
def __unicode__(self):
519
return unicode(str(self))
520
521
522
class DBusPropertyAccessException(DBusPropertyException):
523
"""A property's access permissions disallows an operation.
524
"""
525
pass
526
527
528
class DBusPropertyNotFound(DBusPropertyException):
529
"""An attempt was made to access a non-existing property.
530
"""
531
pass
532
533
534
class DBusObjectWithProperties(dbus.service.Object):
535
"""A D-Bus object with properties.
536
537
Classes inheriting from this can use the dbus_service_property
538
decorator to expose methods as D-Bus properties. It exposes the
539
standard Get(), Set(), and GetAll() methods on the D-Bus.
540
"""
541
542
@staticmethod
543
def _is_dbus_property(obj):
544
return getattr(obj, u"_dbus_is_property", False)
545
546
def _get_all_dbus_properties(self):
547
"""Returns a generator of (name, attribute) pairs
548
"""
549
return ((prop._dbus_name, prop)
550
for name, prop in
551
inspect.getmembers(self, self._is_dbus_property))
552
553
def _get_dbus_property(self, interface_name, property_name):
554
"""Returns a bound method if one exists which is a D-Bus
555
property with the specified name and interface.
556
"""
557
for name in (property_name,
558
property_name + u"_dbus_property"):
559
prop = getattr(self, name, None)
560
if (prop is None
561
or not self._is_dbus_property(prop)
562
or prop._dbus_name != property_name
563
or (interface_name and prop._dbus_interface
564
and interface_name != prop._dbus_interface)):
565
continue
566
return prop
567
# No such property
568
raise DBusPropertyNotFound(self.dbus_object_path + u":"
569
+ interface_name + u"."
570
+ property_name)
571
572
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
573
out_signature=u"v")
574
def Get(self, interface_name, property_name):
575
"""Standard D-Bus property Get() method, see D-Bus standard.
576
"""
577
prop = self._get_dbus_property(interface_name, property_name)
578
if prop._dbus_access == u"write":
579
raise DBusPropertyAccessException(property_name)
580
value = prop()
581
if not hasattr(value, u"variant_level"):
582
return value
583
return type(value)(value, variant_level=value.variant_level+1)
584
585
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
586
def Set(self, interface_name, property_name, value):
587
"""Standard D-Bus property Set() method, see D-Bus standard.
588
"""
589
prop = self._get_dbus_property(interface_name, property_name)
590
if prop._dbus_access == u"read":
591
raise DBusPropertyAccessException(property_name)
592
if prop._dbus_get_args_options[u"byte_arrays"]:
593
value = dbus.ByteArray(''.join(unichr(byte)
594
for byte in value))
595
prop(value)
596
597
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
598
out_signature=u"a{sv}")
599
def GetAll(self, interface_name):
600
"""Standard D-Bus property GetAll() method, see D-Bus
601
standard.
602
603
Note: Will not include properties with access="write".
604
"""
605
all = {}
606
for name, prop in self._get_all_dbus_properties():
607
if (interface_name
608
and interface_name != prop._dbus_interface):
609
# Interface non-empty but did not match
610
continue
611
# Ignore write-only properties
612
if prop._dbus_access == u"write":
613
continue
614
value = prop()
615
if not hasattr(value, u"variant_level"):
616
all[name] = value
617
continue
618
all[name] = type(value)(value, variant_level=
619
value.variant_level+1)
620
return dbus.Dictionary(all, signature=u"sv")
621
622
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
623
out_signature=u"s",
624
path_keyword='object_path',
625
connection_keyword='connection')
626
def Introspect(self, object_path, connection):
627
"""Standard D-Bus method, overloaded to insert property tags.
628
"""
629
xmlstring = dbus.service.Object.Introspect(self, object_path,
630
connection)
631
try:
632
document = xml.dom.minidom.parseString(xmlstring)
633
def make_tag(document, name, prop):
634
e = document.createElement(u"property")
635
e.setAttribute(u"name", name)
636
e.setAttribute(u"type", prop._dbus_signature)
637
e.setAttribute(u"access", prop._dbus_access)
638
return e
639
for if_tag in document.getElementsByTagName(u"interface"):
640
for tag in (make_tag(document, name, prop)
641
for name, prop
642
in self._get_all_dbus_properties()
643
if prop._dbus_interface
644
== if_tag.getAttribute(u"name")):
645
if_tag.appendChild(tag)
646
# Add the names to the return values for the
647
# "org.freedesktop.DBus.Properties" methods
648
if (if_tag.getAttribute(u"name")
649
== u"org.freedesktop.DBus.Properties"):
650
for cn in if_tag.getElementsByTagName(u"method"):
651
if cn.getAttribute(u"name") == u"Get":
652
for arg in cn.getElementsByTagName(u"arg"):
653
if (arg.getAttribute(u"direction")
654
== u"out"):
655
arg.setAttribute(u"name", u"value")
656
elif cn.getAttribute(u"name") == u"GetAll":
657
for arg in cn.getElementsByTagName(u"arg"):
658
if (arg.getAttribute(u"direction")
659
== u"out"):
660
arg.setAttribute(u"name", u"props")
661
xmlstring = document.toxml(u"utf-8")
662
document.unlink()
663
except (AttributeError, xml.dom.DOMException,
664
xml.parsers.expat.ExpatError), error:
665
logger.error(u"Failed to override Introspection method",
666
error)
667
return xmlstring
668
669
670
class ClientDBus(Client, DBusObjectWithProperties):
671
"""A Client class using D-Bus
672
673
Attributes:
674
dbus_object_path: dbus.ObjectPath
675
bus: dbus.SystemBus()
676
"""
677
# dbus.service.Object doesn't use super(), so we can't either.
678
679
def __init__(self, bus = None, *args, **kwargs):
680
self.bus = bus
681
Client.__init__(self, *args, **kwargs)
682
# Only now, when this client is initialized, can it show up on
683
# the D-Bus
684
self.dbus_object_path = (dbus.ObjectPath
685
(u"/clients/"
686
+ self.name.replace(u".", u"_")))
687
DBusObjectWithProperties.__init__(self, self.bus,
688
self.dbus_object_path)
689
690
@staticmethod
691
def _datetime_to_dbus(dt, variant_level=0):
692
"""Convert a UTC datetime.datetime() to a D-Bus type."""
693
return dbus.String(dt.isoformat(),
694
variant_level=variant_level)
695
696
def enable(self):
697
oldstate = getattr(self, u"enabled", False)
698
r = Client.enable(self)
699
if oldstate != self.enabled:
700
# Emit D-Bus signals
701
self.PropertyChanged(dbus.String(u"enabled"),
702
dbus.Boolean(True, variant_level=1))
703
self.PropertyChanged(
704
dbus.String(u"last_enabled"),
705
self._datetime_to_dbus(self.last_enabled,
706
variant_level=1))
707
return r
708
709
def disable(self, quiet = False):
710
oldstate = getattr(self, u"enabled", False)
711
r = Client.disable(self, quiet=quiet)
712
if not quiet and oldstate != self.enabled:
713
# Emit D-Bus signal
714
self.PropertyChanged(dbus.String(u"enabled"),
715
dbus.Boolean(False, variant_level=1))
716
return r
717
718
def __del__(self, *args, **kwargs):
719
try:
720
self.remove_from_connection()
721
except LookupError:
722
pass
723
if hasattr(DBusObjectWithProperties, u"__del__"):
724
DBusObjectWithProperties.__del__(self, *args, **kwargs)
725
Client.__del__(self, *args, **kwargs)
726
727
def checker_callback(self, pid, condition, command,
728
*args, **kwargs):
729
self.checker_callback_tag = None
730
self.checker = None
731
# Emit D-Bus signal
732
self.PropertyChanged(dbus.String(u"checker_running"),
733
dbus.Boolean(False, variant_level=1))
734
if os.WIFEXITED(condition):
735
exitstatus = os.WEXITSTATUS(condition)
736
# Emit D-Bus signal
737
self.CheckerCompleted(dbus.Int16(exitstatus),
738
dbus.Int64(condition),
739
dbus.String(command))
740
else:
741
# Emit D-Bus signal
742
self.CheckerCompleted(dbus.Int16(-1),
743
dbus.Int64(condition),
744
dbus.String(command))
745
746
return Client.checker_callback(self, pid, condition, command,
747
*args, **kwargs)
748
749
def checked_ok(self, *args, **kwargs):
750
r = Client.checked_ok(self, *args, **kwargs)
751
# Emit D-Bus signal
752
self.PropertyChanged(
753
dbus.String(u"last_checked_ok"),
754
(self._datetime_to_dbus(self.last_checked_ok,
755
variant_level=1)))
756
return r
757
758
def start_checker(self, *args, **kwargs):
759
old_checker = self.checker
760
if self.checker is not None:
761
old_checker_pid = self.checker.pid
762
else:
763
old_checker_pid = None
764
r = Client.start_checker(self, *args, **kwargs)
765
# Only if new checker process was started
766
if (self.checker is not None
767
and old_checker_pid != self.checker.pid):
768
# Emit D-Bus signal
769
self.CheckerStarted(self.current_checker_command)
770
self.PropertyChanged(
771
dbus.String(u"checker_running"),
772
dbus.Boolean(True, variant_level=1))
773
return r
774
775
def stop_checker(self, *args, **kwargs):
776
old_checker = getattr(self, u"checker", None)
777
r = Client.stop_checker(self, *args, **kwargs)
778
if (old_checker is not None
779
and getattr(self, u"checker", None) is None):
780
self.PropertyChanged(dbus.String(u"checker_running"),
781
dbus.Boolean(False, variant_level=1))
782
return r
783
784
## D-Bus methods & signals
785
_interface = u"se.bsnet.fukt.Mandos.Client"
786
787
# CheckedOK - method
788
@dbus.service.method(_interface)
789
def CheckedOK(self):
790
return self.checked_ok()
791
792
# CheckerCompleted - signal
793
@dbus.service.signal(_interface, signature=u"nxs")
794
def CheckerCompleted(self, exitcode, waitstatus, command):
795
"D-Bus signal"
796
pass
797
798
# CheckerStarted - signal
799
@dbus.service.signal(_interface, signature=u"s")
800
def CheckerStarted(self, command):
801
"D-Bus signal"
802
pass
803
804
# PropertyChanged - signal
805
@dbus.service.signal(_interface, signature=u"sv")
806
def PropertyChanged(self, property, value):
807
"D-Bus signal"
808
pass
809
810
# GotSecret - signal
811
@dbus.service.signal(_interface)
812
def GotSecret(self):
813
"D-Bus signal"
814
pass
815
816
# Rejected - signal
817
@dbus.service.signal(_interface)
818
def Rejected(self):
819
"D-Bus signal"
820
pass
821
822
# Enable - method
823
@dbus.service.method(_interface)
824
def Enable(self):
825
"D-Bus method"
826
self.enable()
827
828
# StartChecker - method
829
@dbus.service.method(_interface)
830
def StartChecker(self):
831
"D-Bus method"
832
self.start_checker()
833
834
# Disable - method
835
@dbus.service.method(_interface)
836
def Disable(self):
837
"D-Bus method"
838
self.disable()
839
840
# StopChecker - method
841
@dbus.service.method(_interface)
842
def StopChecker(self):
843
self.stop_checker()
844
845
# name - property
846
@dbus_service_property(_interface, signature=u"s", access=u"read")
847
def name_dbus_property(self):
848
return dbus.String(self.name)
849
850
# fingerprint - property
851
@dbus_service_property(_interface, signature=u"s", access=u"read")
852
def fingerprint_dbus_property(self):
853
return dbus.String(self.fingerprint)
854
855
# host - property
856
@dbus_service_property(_interface, signature=u"s",
857
access=u"readwrite")
858
def host_dbus_property(self, value=None):
859
if value is None: # get
860
return dbus.String(self.host)
861
self.host = value
862
# Emit D-Bus signal
863
self.PropertyChanged(dbus.String(u"host"),
864
dbus.String(value, variant_level=1))
865
866
# created - property
867
@dbus_service_property(_interface, signature=u"s", access=u"read")
868
def created_dbus_property(self):
869
return dbus.String(self._datetime_to_dbus(self.created))
870
871
# last_enabled - property
872
@dbus_service_property(_interface, signature=u"s", access=u"read")
873
def last_enabled_dbus_property(self):
874
if self.last_enabled is None:
875
return dbus.String(u"")
876
return dbus.String(self._datetime_to_dbus(self.last_enabled))
877
878
# enabled - property
879
@dbus_service_property(_interface, signature=u"b",
880
access=u"readwrite")
881
def enabled_dbus_property(self, value=None):
882
if value is None: # get
883
return dbus.Boolean(self.enabled)
884
if value:
885
self.enable()
886
else:
887
self.disable()
888
889
# last_checked_ok - property
890
@dbus_service_property(_interface, signature=u"s",
891
access=u"readwrite")
892
def last_checked_ok_dbus_property(self, value=None):
893
if value is not None:
894
self.checked_ok()
895
return
896
if self.last_checked_ok is None:
897
return dbus.String(u"")
898
return dbus.String(self._datetime_to_dbus(self
899
.last_checked_ok))
900
901
# timeout - property
902
@dbus_service_property(_interface, signature=u"t",
903
access=u"readwrite")
904
def timeout_dbus_property(self, value=None):
905
if value is None: # get
906
return dbus.UInt64(self.timeout_milliseconds())
907
self.timeout = datetime.timedelta(0, 0, 0, value)
908
# Emit D-Bus signal
909
self.PropertyChanged(dbus.String(u"timeout"),
910
dbus.UInt64(value, variant_level=1))
911
if getattr(self, u"disable_initiator_tag", None) is None:
912
return
913
# Reschedule timeout
914
gobject.source_remove(self.disable_initiator_tag)
915
self.disable_initiator_tag = None
916
time_to_die = (self.
917
_timedelta_to_milliseconds((self
918
.last_checked_ok
919
+ self.timeout)
920
- datetime.datetime
921
.utcnow()))
922
if time_to_die <= 0:
923
# The timeout has passed
924
self.disable()
925
else:
926
self.disable_initiator_tag = (gobject.timeout_add
927
(time_to_die, self.disable))
928
929
# interval - property
930
@dbus_service_property(_interface, signature=u"t",
931
access=u"readwrite")
932
def interval_dbus_property(self, value=None):
933
if value is None: # get
934
return dbus.UInt64(self.interval_milliseconds())
935
self.interval = datetime.timedelta(0, 0, 0, value)
936
# Emit D-Bus signal
937
self.PropertyChanged(dbus.String(u"interval"),
938
dbus.UInt64(value, variant_level=1))
939
if getattr(self, u"checker_initiator_tag", None) is None:
940
return
941
# Reschedule checker run
942
gobject.source_remove(self.checker_initiator_tag)
943
self.checker_initiator_tag = (gobject.timeout_add
944
(value, self.start_checker))
945
self.start_checker() # Start one now, too
946
947
# checker - property
948
@dbus_service_property(_interface, signature=u"s",
949
access=u"readwrite")
950
def checker_dbus_property(self, value=None):
951
if value is None: # get
952
return dbus.String(self.checker_command)
953
self.checker_command = value
954
# Emit D-Bus signal
955
self.PropertyChanged(dbus.String(u"checker"),
956
dbus.String(self.checker_command,
957
variant_level=1))
958
959
# checker_running - property
960
@dbus_service_property(_interface, signature=u"b",
961
access=u"readwrite")
962
def checker_running_dbus_property(self, value=None):
963
if value is None: # get
964
return dbus.Boolean(self.checker is not None)
965
if value:
966
self.start_checker()
967
else:
968
self.stop_checker()
969
970
# object_path - property
971
@dbus_service_property(_interface, signature=u"o", access=u"read")
972
def object_path_dbus_property(self):
973
return self.dbus_object_path # is already a dbus.ObjectPath
974
975
# secret = property
976
@dbus_service_property(_interface, signature=u"ay",
977
access=u"write", byte_arrays=True)
978
def secret_dbus_property(self, value):
979
self.secret = str(value)
980
981
del _interface
982
983
984
class ClientHandler(socketserver.BaseRequestHandler, object):
985
"""A class to handle client connections.
986
987
Instantiated once for each connection to handle it.
988
Note: This will run in its own forked process."""
989
990
def handle(self):
991
logger.info(u"TCP connection from: %s",
992
unicode(self.client_address))
993
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
994
# Open IPC pipe to parent process
995
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
996
session = (gnutls.connection
997
.ClientSession(self.request,
998
gnutls.connection
999
.X509Credentials()))
1000
1001
line = self.request.makefile().readline()
1002
logger.debug(u"Protocol version: %r", line)
1003
try:
1004
if int(line.strip().split()[0]) > 1:
1005
raise RuntimeError
1006
except (ValueError, IndexError, RuntimeError), error:
1007
logger.error(u"Unknown protocol version: %s", error)
1008
return
1009
1010
# Note: gnutls.connection.X509Credentials is really a
1011
# generic GnuTLS certificate credentials object so long as
1012
# no X.509 keys are added to it. Therefore, we can use it
1013
# here despite using OpenPGP certificates.
1014
1015
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1016
# u"+AES-256-CBC", u"+SHA1",
1017
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1018
# u"+DHE-DSS"))
1019
# Use a fallback default, since this MUST be set.
1020
priority = self.server.gnutls_priority
1021
if priority is None:
1022
priority = u"NORMAL"
1023
(gnutls.library.functions
1024
.gnutls_priority_set_direct(session._c_object,
1025
priority, None))
1026
1027
try:
1028
session.handshake()
1029
except gnutls.errors.GNUTLSError, error:
1030
logger.warning(u"Handshake failed: %s", error)
1031
# Do not run session.bye() here: the session is not
1032
# established. Just abandon the request.
1033
return
1034
logger.debug(u"Handshake succeeded")
1035
try:
1036
fpr = self.fingerprint(self.peer_certificate(session))
1037
except (TypeError, gnutls.errors.GNUTLSError), error:
1038
logger.warning(u"Bad certificate: %s", error)
1039
session.bye()
1040
return
1041
logger.debug(u"Fingerprint: %s", fpr)
1042
1043
for c in self.server.clients:
1044
if c.fingerprint == fpr:
1045
client = c
1046
break
1047
else:
1048
ipc.write(u"NOTFOUND %s %s\n"
1049
% (fpr, unicode(self.client_address)))
1050
session.bye()
1051
return
1052
# Have to check if client.still_valid(), since it is
1053
# possible that the client timed out while establishing
1054
# the GnuTLS session.
1055
if not client.still_valid():
1056
ipc.write(u"INVALID %s\n" % client.name)
1057
session.bye()
1058
return
1059
ipc.write(u"SENDING %s\n" % client.name)
1060
sent_size = 0
1061
while sent_size < len(client.secret):
1062
sent = session.send(client.secret[sent_size:])
1063
logger.debug(u"Sent: %d, remaining: %d",
1064
sent, len(client.secret)
1065
- (sent_size + sent))
1066
sent_size += sent
55
return super(type(self), self).server_bind()
56
57
58
def init_with_options(self, *args, **kwargs):
59
if "options" in kwargs:
60
self.options = kwargs["options"]
61
del kwargs["options"]
62
if "clients" in kwargs:
63
self.clients = kwargs["clients"]
64
del kwargs["clients"]
65
if "credentials" in kwargs:
66
self.credentials = kwargs["credentials"]
67
del kwargs["credentials"]
68
return super(type(self), self).__init__(*args, **kwargs)
69
70
71
class udp_handler(SocketServer.DatagramRequestHandler, object):
72
def handle(self):
73
self.wfile.write("Polo")
74
print "UDP request answered"
75
76
77
class IPv6_UDPServer(SocketServer.UDPServer, object):
78
__init__ = init_with_options
79
address_family = socket.AF_INET6
80
allow_reuse_address = True
81
server_bind = server_bind
82
def verify_request(self, request, client_address):
83
print "UDP request came"
84
return request[0] == "Marco"
85
86
87
class tcp_handler(SocketServer.BaseRequestHandler, object):
88
def handle(self):
89
print "TCP request came"
90
print "Request:", self.request
91
print "Client Address:", self.client_address
92
print "Server:", self.server
93
session = gnutls.connection.ServerSession(self.request,
94
self.server.credentials)
95
session.handshake()
96
if session.peer_certificate:
97
print "DN:", session.peer_certificate.subject
98
try:
99
session.verify_peer()
100
except gnutls.errors.CertificateError, error:
101
print "Verify failed", error
1067
102
session.bye()
1068
1069
@staticmethod
1070
def peer_certificate(session):
1071
"Return the peer's OpenPGP certificate as a bytestring"
1072
# If not an OpenPGP certificate...
1073
if (gnutls.library.functions
1074
.gnutls_certificate_type_get(session._c_object)
1075
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1076
# ...do the normal thing
1077
return session.peer_certificate
1078
list_size = ctypes.c_uint(1)
1079
cert_list = (gnutls.library.functions
1080
.gnutls_certificate_get_peers
1081
(session._c_object, ctypes.byref(list_size)))
1082
if not bool(cert_list) and list_size.value != 0:
1083
raise gnutls.errors.GNUTLSError(u"error getting peer"
1084
u" certificate")
1085
if list_size.value == 0:
1086
return None
1087
cert = cert_list[0]
1088
return ctypes.string_at(cert.data, cert.size)
1089
1090
@staticmethod
1091
def fingerprint(openpgp):
1092
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1093
# New GnuTLS "datum" with the OpenPGP public key
1094
datum = (gnutls.library.types
1095
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1096
ctypes.POINTER
1097
(ctypes.c_ubyte)),
1098
ctypes.c_uint(len(openpgp))))
1099
# New empty GnuTLS certificate
1100
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1101
(gnutls.library.functions
1102
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1103
# Import the OpenPGP public key into the certificate
1104
(gnutls.library.functions
1105
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1106
gnutls.library.constants
1107
.GNUTLS_OPENPGP_FMT_RAW))
1108
# Verify the self signature in the key
1109
crtverify = ctypes.c_uint()
1110
(gnutls.library.functions
1111
.gnutls_openpgp_crt_verify_self(crt, 0,
1112
ctypes.byref(crtverify)))
1113
if crtverify.value != 0:
1114
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1115
raise (gnutls.errors.CertificateSecurityError
1116
(u"Verify failed"))
1117
# New buffer for the fingerprint
1118
buf = ctypes.create_string_buffer(20)
1119
buf_len = ctypes.c_size_t()
1120
# Get the fingerprint from the certificate into the buffer
1121
(gnutls.library.functions
1122
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1123
ctypes.byref(buf_len)))
1124
# Deinit the certificate
1125
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1126
# Convert the buffer to a Python bytestring
1127
fpr = ctypes.string_at(buf, buf_len.value)
1128
# Convert the bytestring to hexadecimal notation
1129
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1130
return hex_fpr
1131
1132
1133
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1134
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1135
def process_request(self, request, client_address):
1136
"""Overrides and wraps the original process_request().
1137
1138
This function creates a new pipe in self.pipe
1139
"""
1140
self.pipe = os.pipe()
1141
super(ForkingMixInWithPipe,
1142
self).process_request(request, client_address)
1143
os.close(self.pipe[1]) # close write end
1144
self.add_pipe(self.pipe[0])
1145
def add_pipe(self, pipe):
1146
"""Dummy function; override as necessary"""
1147
os.close(pipe)
1148
1149
1150
class IPv6_TCPServer(ForkingMixInWithPipe,
1151
socketserver.TCPServer, object):
1152
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1153
1154
Attributes:
1155
enabled: Boolean; whether this server is activated yet
1156
interface: None or a network interface name (string)
1157
use_ipv6: Boolean; to use IPv6 or not
1158
"""
1159
def __init__(self, server_address, RequestHandlerClass,
1160
interface=None, use_ipv6=True):
1161
self.interface = interface
1162
if use_ipv6:
1163
self.address_family = socket.AF_INET6
1164
socketserver.TCPServer.__init__(self, server_address,
1165
RequestHandlerClass)
1166
def server_bind(self):
1167
"""This overrides the normal server_bind() function
1168
to bind to an interface if one was specified, and also NOT to
1169
bind to an address or port if they were not specified."""
1170
if self.interface is not None:
1171
if SO_BINDTODEVICE is None:
1172
logger.error(u"SO_BINDTODEVICE does not exist;"
1173
u" cannot bind to interface %s",
1174
self.interface)
1175
else:
1176
try:
1177
self.socket.setsockopt(socket.SOL_SOCKET,
1178
SO_BINDTODEVICE,
1179
str(self.interface
1180
+ u'\0'))
1181
except socket.error, error:
1182
if error[0] == errno.EPERM:
1183
logger.error(u"No permission to"
1184
u" bind to interface %s",
1185
self.interface)
1186
elif error[0] == errno.ENOPROTOOPT:
1187
logger.error(u"SO_BINDTODEVICE not available;"
1188
u" cannot bind to interface %s",
1189
self.interface)
1190
else:
1191
raise
1192
# Only bind(2) the socket if we really need to.
1193
if self.server_address[0] or self.server_address[1]:
1194
if not self.server_address[0]:
1195
if self.address_family == socket.AF_INET6:
1196
any_address = u"::" # in6addr_any
1197
else:
1198
any_address = socket.INADDR_ANY
1199
self.server_address = (any_address,
1200
self.server_address[1])
1201
elif not self.server_address[1]:
1202
self.server_address = (self.server_address[0],
1203
0)
1204
# if self.interface:
1205
# self.server_address = (self.server_address[0],
1206
# 0, # port
1207
# 0, # flowinfo
1208
# if_nametoindex
1209
# (self.interface))
1210
return socketserver.TCPServer.server_bind(self)
1211
1212
1213
class MandosServer(IPv6_TCPServer):
1214
"""Mandos server.
1215
1216
Attributes:
1217
clients: set of Client objects
1218
gnutls_priority GnuTLS priority string
1219
use_dbus: Boolean; to emit D-Bus signals or not
1220
1221
Assumes a gobject.MainLoop event loop.
1222
"""
1223
def __init__(self, server_address, RequestHandlerClass,
1224
interface=None, use_ipv6=True, clients=None,
1225
gnutls_priority=None, use_dbus=True):
1226
self.enabled = False
1227
self.clients = clients
1228
if self.clients is None:
1229
self.clients = set()
1230
self.use_dbus = use_dbus
1231
self.gnutls_priority = gnutls_priority
1232
IPv6_TCPServer.__init__(self, server_address,
1233
RequestHandlerClass,
1234
interface = interface,
1235
use_ipv6 = use_ipv6)
1236
def server_activate(self):
1237
if self.enabled:
1238
return socketserver.TCPServer.server_activate(self)
1239
def enable(self):
1240
self.enabled = True
1241
def add_pipe(self, pipe):
1242
# Call "handle_ipc" for both data and EOF events
1243
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1244
self.handle_ipc)
1245
def handle_ipc(self, source, condition, file_objects={}):
1246
condition_names = {
1247
gobject.IO_IN: u"IN", # There is data to read.
1248
gobject.IO_OUT: u"OUT", # Data can be written (without
1249
# blocking).
1250
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1251
gobject.IO_ERR: u"ERR", # Error condition.
1252
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1253
# broken, usually for pipes and
1254
# sockets).
1255
}
1256
conditions_string = ' | '.join(name
1257
for cond, name in
1258
condition_names.iteritems()
1259
if cond & condition)
1260
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1261
conditions_string)
1262
1263
# Turn the pipe file descriptor into a Python file object
1264
if source not in file_objects:
1265
file_objects[source] = os.fdopen(source, u"r", 1)
1266
1267
# Read a line from the file object
1268
cmdline = file_objects[source].readline()
1269
if not cmdline: # Empty line means end of file
1270
# close the IPC pipe
1271
file_objects[source].close()
1272
del file_objects[source]
1273
1274
# Stop calling this function
1275
return False
1276
1277
logger.debug(u"IPC command: %r", cmdline)
1278
1279
# Parse and act on command
1280
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1281
1282
if cmd == u"NOTFOUND":
1283
fpr, address = args.split(None, 1)
1284
logger.warning(u"Client not found for fingerprint: %s, ad"
1285
u"dress: %s", fpr, address)
1286
if self.use_dbus:
1287
# Emit D-Bus signal
1288
mandos_dbus_service.ClientNotFound(fpr, address)
1289
elif cmd == u"INVALID":
1290
for client in self.clients:
1291
if client.name == args:
1292
logger.warning(u"Client %s is invalid", args)
1293
if self.use_dbus:
1294
# Emit D-Bus signal
1295
client.Rejected()
1296
break
1297
else:
1298
logger.error(u"Unknown client %s is invalid", args)
1299
elif cmd == u"SENDING":
1300
for client in self.clients:
1301
if client.name == args:
1302
logger.info(u"Sending secret to %s", client.name)
1303
client.checked_ok()
1304
if self.use_dbus:
1305
# Emit D-Bus signal
1306
client.GotSecret()
1307
break
1308
else:
1309
logger.error(u"Sending secret to unknown client %s",
1310
args)
1311
else:
1312
logger.error(u"Unknown IPC command: %r", cmdline)
1313
1314
# Keep calling this function
1315
return True
1316
103
return
104
try:
105
session.send(dict((client.dn, client.password)
106
for client in self.server.clients)
107
[session.peer_certificate.subject])
108
except KeyError:
109
session.send("gazonk")
110
# Log maybe? XXX
111
session.bye()
112
113
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
114
__init__ = init_with_options
115
address_family = socket.AF_INET6
116
allow_reuse_address = True
117
request_queue_size = 1024
118
server_bind = server_bind
119
120
121
in6addr_any = "::"
122
123
cred = None
1317
124
1318
125
def string_to_delta(interval):
1319
126
"""Parse a string and return a datetime.timedelta
1320
1321
>>> string_to_delta(u'7d')
127
128
>>> string_to_delta('7d')
1322
129
datetime.timedelta(7)
1323
>>> string_to_delta(u'60s')
130
>>> string_to_delta('60s')
1324
131
datetime.timedelta(0, 60)
1325
>>> string_to_delta(u'60m')
132
>>> string_to_delta('60m')
1326
133
datetime.timedelta(0, 3600)
1327
>>> string_to_delta(u'24h')
134
>>> string_to_delta('24h')
1328
135
datetime.timedelta(1)
1329
136
>>> string_to_delta(u'1w')
1330
137
datetime.timedelta(7)
1331
>>> string_to_delta(u'5m 30s')
1332
datetime.timedelta(0, 330)
1333
138
"""
1334
timevalue = datetime.timedelta(0)
1335
for s in interval.split():
1336
try:
1337
suffix = unicode(s[-1])
1338
value = int(s[:-1])
1339
if suffix == u"d":
1340
delta = datetime.timedelta(value)
1341
elif suffix == u"s":
1342
delta = datetime.timedelta(0, value)
1343
elif suffix == u"m":
1344
delta = datetime.timedelta(0, 0, 0, 0, value)
1345
elif suffix == u"h":
1346
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1347
elif suffix == u"w":
1348
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1349
else:
1350
raise ValueError(u"Unknown suffix %r" % suffix)
1351
except (ValueError, IndexError), e:
1352
raise ValueError(e.message)
1353
timevalue += delta
1354
return timevalue
1355
1356
1357
def if_nametoindex(interface):
1358
"""Call the C function if_nametoindex(), or equivalent
1359
1360
Note: This function cannot accept a unicode string."""
1361
global if_nametoindex
1362
139
try:
1363
if_nametoindex = (ctypes.cdll.LoadLibrary
1364
(ctypes.util.find_library(u"c"))
1365
.if_nametoindex)
1366
except (OSError, AttributeError):
1367
logger.warning(u"Doing if_nametoindex the hard way")
1368
def if_nametoindex(interface):
1369
"Get an interface index the hard way, i.e. using fcntl()"
1370
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1371
with closing(socket.socket()) as s:
1372
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1373
struct.pack(str(u"16s16x"),
1374
interface))
1375
interface_index = struct.unpack(str(u"I"),
1376
ifreq[16:20])[0]
1377
return interface_index
1378
return if_nametoindex(interface)
1379
1380
1381
def daemon(nochdir = False, noclose = False):
1382
"""See daemon(3). Standard BSD Unix function.
1383
1384
This should really exist as os.daemon, but it doesn't (yet)."""
1385
if os.fork():
1386
sys.exit()
1387
os.setsid()
1388
if not nochdir:
1389
os.chdir(u"/")
1390
if os.fork():
1391
sys.exit()
1392
if not noclose:
1393
# Close all standard open file descriptors
1394
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1395
if not stat.S_ISCHR(os.fstat(null).st_mode):
1396
raise OSError(errno.ENODEV,
1397
u"%s not a character device"
1398
% os.path.devnull)
1399
os.dup2(null, sys.stdin.fileno())
1400
os.dup2(null, sys.stdout.fileno())
1401
os.dup2(null, sys.stderr.fileno())
1402
if null > 2:
1403
os.close(null)
1404
140
suffix=unicode(interval[-1])
141
value=int(interval[:-1])
142
if suffix == u"d":
143
delta = datetime.timedelta(value)
144
elif suffix == u"s":
145
delta = datetime.timedelta(0, value)
146
elif suffix == u"m":
147
delta = datetime.timedelta(0, 0, 0, 0, value)
148
elif suffix == u"h":
149
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
150
elif suffix == u"w":
151
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
152
else:
153
raise ValueError
154
except (ValueError, IndexError):
155
raise ValueError
156
return delta
1405
157
1406
158
def main():
1407
1408
##################################################################
1409
# Parsing of options, both command line and config file
1410
1411
parser = optparse.OptionParser(version = "%%prog %s" % version)
1412
parser.add_option("-i", u"--interface", type=u"string",
1413
metavar="IF", help=u"Bind to interface IF")
1414
parser.add_option("-a", u"--address", type=u"string",
1415
help=u"Address to listen for requests on")
1416
parser.add_option("-p", u"--port", type=u"int",
1417
help=u"Port number to receive requests on")
1418
parser.add_option("--check", action=u"store_true",
1419
help=u"Run self-test")
1420
parser.add_option("--debug", action=u"store_true",
1421
help=u"Debug mode; run in foreground and log to"
1422
u" terminal")
1423
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1424
u" priority string (see GnuTLS documentation)")
1425
parser.add_option("--servicename", type=u"string",
1426
metavar=u"NAME", help=u"Zeroconf service name")
1427
parser.add_option("--configdir", type=u"string",
1428
default=u"/etc/mandos", metavar=u"DIR",
1429
help=u"Directory to search for configuration"
1430
u" files")
1431
parser.add_option("--no-dbus", action=u"store_false",
1432
dest=u"use_dbus", help=u"Do not provide D-Bus"
1433
u" system bus interface")
1434
parser.add_option("--no-ipv6", action=u"store_false",
1435
dest=u"use_ipv6", help=u"Do not use IPv6")
1436
options = parser.parse_args()[0]
1437
159
parser = OptionParser()
160
parser.add_option("-i", "--interface", type="string",
161
default="eth0", metavar="IF",
162
help="Interface to bind to")
163
parser.add_option("--cert", type="string", default="cert.pem",
164
metavar="FILE",
165
help="Public key certificate to use")
166
parser.add_option("--key", type="string", default="key.pem",
167
metavar="FILE",
168
help="Private key to use")
169
parser.add_option("--ca", type="string", default="ca.pem",
170
metavar="FILE",
171
help="Certificate Authority certificate to use")
172
parser.add_option("--crl", type="string", default="crl.pem",
173
metavar="FILE",
174
help="Certificate Revokation List to use")
175
parser.add_option("-p", "--port", type="int", default=49001,
176
help="Port number to receive requests on")
177
parser.add_option("--dh", type="int", metavar="BITS",
178
help="DH group to use")
179
parser.add_option("-t", "--timeout", type="string", # Parsed later
180
default="15m",
181
help="Amount of downtime allowed for clients")
182
parser.add_option("--interval", type="string", # Parsed later
183
default="5m",
184
help="How often to check that a client is up")
185
parser.add_option("--check", action="store_true", default=False,
186
help="Run self-test")
187
(options, args) = parser.parse_args()
188
1438
189
if options.check:
1439
190
import doctest
1440
191
doctest.testmod()
1441
192
sys.exit()
1442
193
1443
# Default values for config file for server-global settings
1444
server_defaults = { u"interface": u"",
1445
u"address": u"",
1446
u"port": u"",
1447
u"debug": u"False",
1448
u"priority":
1449
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1450
u"servicename": u"Mandos",
1451
u"use_dbus": u"True",
1452
u"use_ipv6": u"True",
1453
}
1454
1455
# Parse config file for server-global settings
1456
server_config = configparser.SafeConfigParser(server_defaults)
1457
del server_defaults
1458
server_config.read(os.path.join(options.configdir,
1459
u"mandos.conf"))
1460
# Convert the SafeConfigParser object to a dict
1461
server_settings = server_config.defaults()
1462
# Use the appropriate methods on the non-string config options
1463
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1464
server_settings[option] = server_config.getboolean(u"DEFAULT",
1465
option)
1466
if server_settings["port"]:
1467
server_settings["port"] = server_config.getint(u"DEFAULT",
1468
u"port")
1469
del server_config
1470
1471
# Override the settings from the config file with command line
1472
# options, if set.
1473
for option in (u"interface", u"address", u"port", u"debug",
1474
u"priority", u"servicename", u"configdir",
1475
u"use_dbus", u"use_ipv6"):
1476
value = getattr(options, option)
1477
if value is not None:
1478
server_settings[option] = value
1479
del options
1480
# Force all strings to be unicode
1481
for option in server_settings.keys():
1482
if type(server_settings[option]) is str:
1483
server_settings[option] = unicode(server_settings[option])
1484
# Now we have our good server settings in "server_settings"
1485
1486
##################################################################
1487
1488
# For convenience
1489
debug = server_settings[u"debug"]
1490
use_dbus = server_settings[u"use_dbus"]
1491
use_ipv6 = server_settings[u"use_ipv6"]
1492
1493
if not debug:
1494
syslogger.setLevel(logging.WARNING)
1495
console.setLevel(logging.WARNING)
1496
1497
if server_settings[u"servicename"] != u"Mandos":
1498
syslogger.setFormatter(logging.Formatter
1499
(u'Mandos (%s) [%%(process)d]:'
1500
u' %%(levelname)s: %%(message)s'
1501
% server_settings[u"servicename"]))
1502
1503
# Parse config file with clients
1504
client_defaults = { u"timeout": u"1h",
1505
u"interval": u"5m",
1506
u"checker": u"fping -q -- %%(host)s",
1507
u"host": u"",
1508
}
1509
client_config = configparser.SafeConfigParser(client_defaults)
1510
client_config.read(os.path.join(server_settings[u"configdir"],
1511
u"clients.conf"))
1512
1513
global mandos_dbus_service
1514
mandos_dbus_service = None
1515
1516
tcp_server = MandosServer((server_settings[u"address"],
1517
server_settings[u"port"]),
1518
ClientHandler,
1519
interface=server_settings[u"interface"],
1520
use_ipv6=use_ipv6,
1521
gnutls_priority=
1522
server_settings[u"priority"],
1523
use_dbus=use_dbus)
1524
pidfilename = u"/var/run/mandos.pid"
1525
try:
1526
pidfile = open(pidfilename, u"w")
1527
except IOError:
1528
logger.error(u"Could not open file %r", pidfilename)
1529
1530
try:
1531
uid = pwd.getpwnam(u"_mandos").pw_uid
1532
gid = pwd.getpwnam(u"_mandos").pw_gid
1533
except KeyError:
1534
try:
1535
uid = pwd.getpwnam(u"mandos").pw_uid
1536
gid = pwd.getpwnam(u"mandos").pw_gid
1537
except KeyError:
1538
try:
1539
uid = pwd.getpwnam(u"nobody").pw_uid
1540
gid = pwd.getpwnam(u"nobody").pw_gid
1541
except KeyError:
1542
uid = 65534
1543
gid = 65534
1544
try:
1545
os.setgid(gid)
1546
os.setuid(uid)
1547
except OSError, error:
1548
if error[0] != errno.EPERM:
1549
raise error
1550
1551
# Enable all possible GnuTLS debugging
1552
if debug:
1553
# "Use a log level over 10 to enable all debugging options."
1554
# - GnuTLS manual
1555
gnutls.library.functions.gnutls_global_set_log_level(11)
1556
1557
@gnutls.library.types.gnutls_log_func
1558
def debug_gnutls(level, string):
1559
logger.debug(u"GnuTLS: %s", string[:-1])
1560
1561
(gnutls.library.functions
1562
.gnutls_global_set_log_function(debug_gnutls))
1563
1564
global main_loop
1565
# From the Avahi example code
1566
DBusGMainLoop(set_as_default=True )
1567
main_loop = gobject.MainLoop()
1568
bus = dbus.SystemBus()
1569
# End of Avahi example code
1570
if use_dbus:
1571
try:
1572
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1573
bus, do_not_queue=True)
1574
except dbus.exceptions.NameExistsException, e:
1575
logger.error(unicode(e) + u", disabling D-Bus")
1576
use_dbus = False
1577
server_settings[u"use_dbus"] = False
1578
tcp_server.use_dbus = False
1579
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1580
service = AvahiService(name = server_settings[u"servicename"],
1581
servicetype = u"_mandos._tcp",
1582
protocol = protocol, bus = bus)
1583
if server_settings["interface"]:
1584
service.interface = (if_nametoindex
1585
(str(server_settings[u"interface"])))
1586
1587
client_class = Client
1588
if use_dbus:
1589
client_class = functools.partial(ClientDBus, bus = bus)
1590
tcp_server.clients.update(set(
1591
client_class(name = section,
1592
config= dict(client_config.items(section)))
1593
for section in client_config.sections()))
1594
if not tcp_server.clients:
1595
logger.warning(u"No clients defined")
1596
1597
if debug:
1598
# Redirect stdin so all checkers get /dev/null
1599
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1600
os.dup2(null, sys.stdin.fileno())
1601
if null > 2:
1602
os.close(null)
1603
else:
1604
# No console logging
1605
logger.removeHandler(console)
1606
# Close all input and output, do double fork, etc.
1607
daemon()
1608
1609
try:
1610
with closing(pidfile):
1611
pid = os.getpid()
1612
pidfile.write(str(pid) + "\n")
1613
del pidfile
1614
except IOError:
1615
logger.error(u"Could not write to file %r with PID %d",
1616
pidfilename, pid)
1617
except NameError:
1618
# "pidfile" was never created
1619
pass
1620
del pidfilename
1621
1622
if not debug:
1623
signal.signal(signal.SIGINT, signal.SIG_IGN)
1624
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1625
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1626
1627
if use_dbus:
1628
class MandosDBusService(dbus.service.Object):
1629
"""A D-Bus proxy object"""
1630
def __init__(self):
1631
dbus.service.Object.__init__(self, bus, u"/")
1632
_interface = u"se.bsnet.fukt.Mandos"
1633
1634
@dbus.service.signal(_interface, signature=u"oa{sv}")
1635
def ClientAdded(self, objpath, properties):
1636
"D-Bus signal"
1637
pass
1638
1639
@dbus.service.signal(_interface, signature=u"ss")
1640
def ClientNotFound(self, fingerprint, address):
1641
"D-Bus signal"
1642
pass
1643
1644
@dbus.service.signal(_interface, signature=u"os")
1645
def ClientRemoved(self, objpath, name):
1646
"D-Bus signal"
1647
pass
1648
1649
@dbus.service.method(_interface, out_signature=u"ao")
1650
def GetAllClients(self):
1651
"D-Bus method"
1652
return dbus.Array(c.dbus_object_path
1653
for c in tcp_server.clients)
1654
1655
@dbus.service.method(_interface,
1656
out_signature=u"a{oa{sv}}")
1657
def GetAllClientsWithProperties(self):
1658
"D-Bus method"
1659
return dbus.Dictionary(
1660
((c.dbus_object_path, c.GetAll(u""))
1661
for c in tcp_server.clients),
1662
signature=u"oa{sv}")
1663
1664
@dbus.service.method(_interface, in_signature=u"o")
1665
def RemoveClient(self, object_path):
1666
"D-Bus method"
1667
for c in tcp_server.clients:
1668
if c.dbus_object_path == object_path:
1669
tcp_server.clients.remove(c)
1670
c.remove_from_connection()
1671
# Don't signal anything except ClientRemoved
1672
c.disable(quiet=True)
1673
# Emit D-Bus signal
1674
self.ClientRemoved(object_path, c.name)
1675
return
1676
raise KeyError(object_path)
1677
1678
del _interface
1679
1680
mandos_dbus_service = MandosDBusService()
1681
1682
def cleanup():
1683
"Cleanup function; run on exit"
1684
service.cleanup()
1685
1686
while tcp_server.clients:
1687
client = tcp_server.clients.pop()
1688
if use_dbus:
1689
client.remove_from_connection()
1690
client.disable_hook = None
1691
# Don't signal anything except ClientRemoved
1692
client.disable(quiet=True)
1693
if use_dbus:
1694
# Emit D-Bus signal
1695
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1696
client.name)
1697
1698
atexit.register(cleanup)
1699
1700
for client in tcp_server.clients:
1701
if use_dbus:
1702
# Emit D-Bus signal
1703
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1704
client.GetAll(u""))
1705
client.enable()
1706
1707
tcp_server.enable()
1708
tcp_server.server_activate()
1709
1710
# Find out what port we got
1711
service.port = tcp_server.socket.getsockname()[1]
1712
if use_ipv6:
1713
logger.info(u"Now listening on address %r, port %d,"
1714
" flowinfo %d, scope_id %d"
1715
% tcp_server.socket.getsockname())
1716
else: # IPv4
1717
logger.info(u"Now listening on address %r, port %d"
1718
% tcp_server.socket.getsockname())
1719
1720
#service.interface = tcp_server.socket.getsockname()[3]
1721
1722
try:
1723
# From the Avahi example code
1724
try:
1725
service.activate()
1726
except dbus.exceptions.DBusException, error:
1727
logger.critical(u"DBusException: %s", error)
1728
cleanup()
1729
sys.exit(1)
1730
# End of Avahi example code
1731
1732
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1733
lambda *args, **kwargs:
1734
(tcp_server.handle_request
1735
(*args[2:], **kwargs) or True))
1736
1737
logger.debug(u"Starting main loop")
1738
main_loop.run()
1739
except AvahiError, error:
1740
logger.critical(u"AvahiError: %s", error)
1741
cleanup()
1742
sys.exit(1)
1743
except KeyboardInterrupt:
1744
if debug:
1745
print >> sys.stderr
1746
logger.debug(u"Server received KeyboardInterrupt")
1747
logger.debug(u"Server exiting")
1748
# Must run before the D-Bus bus name gets deregistered
1749
cleanup()
1750
1751
if __name__ == '__main__':
194
# Parse the time arguments
195
try:
196
options.timeout = string_to_delta(options.timeout)
197
except ValueError:
198
parser.error("option --timeout: Unparseable time")
199
200
try:
201
options.interval = string_to_delta(options.interval)
202
except ValueError:
203
parser.error("option --interval: Unparseable time")
204
205
cert = gnutls.crypto.X509Certificate(open(options.cert).read())
206
key = gnutls.crypto.X509PrivateKey(open(options.key).read())
207
ca = gnutls.crypto.X509Certificate(open(options.ca).read())
208
crl = gnutls.crypto.X509CRL(open(options.crl).read())
209
cred = gnutls.connection.X509Credentials(cert, key, [ca], [crl])
210
211
# Parse config file
212
defaults = {}
213
client_config_object = ConfigParser.SafeConfigParser(defaults)
214
client_config_object.read("mandos-clients.conf")
215
clients = [Client(name=section,
216
**(dict(client_config_object.items(section))))
217
for section in client_config_object.sections()]
218
219
udp_server = IPv6_UDPServer((in6addr_any, options.port),
220
udp_handler,
221
options=options)
222
223
tcp_server = IPv6_TCPServer((in6addr_any, options.port),
224
tcp_handler,
225
options=options,
226
clients=clients,
227
credentials=cred)
228
229
while True:
230
in_, out, err = select.select((udp_server,
231
tcp_server), (), ())
232
for server in in_:
233
server.handle_request()
234
235
236
if __name__ == "__main__":
1752
237
main()
238
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0