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- Committer: Teddy Hogeborn
- Date: 2008-09-04 07:30:58 UTC
- mfrom: (24.1.87 mandos)
- Revision ID: teddy@fukt.bsnet.se-20080904073058-h21spydersnh8jml
* README: Improved wording.
- files added:
- plugins.d/usplash
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- .bzrignore
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
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12
#
13
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
#
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
31
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# Contact the authors at <mandos@fukt.bsnet.se>.
32
31
#
33
32
34
from __future__ import division, with_statement, absolute_import
33
from __future__ import division
35
34
36
import SocketServer as socketserver
35
import SocketServer
37
36
import socket
38
import optparse
37
import select
38
from optparse import OptionParser
39
39
import datetime
40
40
import errno
41
41
import gnutls.crypto
44
44
import gnutls.library.functions
45
45
import gnutls.library.constants
46
46
import gnutls.library.types
47
import ConfigParser as configparser
47
import ConfigParser
48
48
import sys
49
49
import re
50
50
import os
51
51
import signal
52
from sets import Set
52
53
import subprocess
53
54
import atexit
54
55
import stat
55
56
import logging
56
57
import logging.handlers
57
import pwd
58
from contextlib import closing
59
import struct
60
import fcntl
61
import functools
62
58
63
59
import dbus
64
import dbus.service
65
60
import gobject
66
61
import avahi
67
62
from dbus.mainloop.glib import DBusGMainLoop
68
63
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'))
64
65
version = "1.0"
66
67
logger = logging.Logger('mandos')
68
syslogger = logging.handlers.SysLogHandler\
69
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
70
address = "/dev/log")
71
syslogger.setFormatter(logging.Formatter\
72
('Mandos: %(levelname)s: %(message)s'))
91
73
logger.addHandler(syslogger)
92
74
93
75
console = logging.StreamHandler()
94
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
95
u' %(levelname)s:'
96
u' %(message)s'))
76
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
77
' %(message)s'))
97
78
logger.addHandler(console)
98
79
99
80
class AvahiError(Exception):
100
def __init__(self, value, *args, **kwargs):
81
def __init__(self, value):
101
82
self.value = value
102
super(AvahiError, self).__init__(value, *args, **kwargs)
103
def __unicode__(self):
104
return unicode(repr(self.value))
83
def __str__(self):
84
return repr(self.value)
105
85
106
86
class AvahiServiceError(AvahiError):
107
87
pass
112
92
113
93
class AvahiService(object):
114
94
"""An Avahi (Zeroconf) service.
115
116
95
Attributes:
117
96
interface: integer; avahi.IF_UNSPEC or an interface index.
118
97
Used to optionally bind to the specified interface.
119
name: string; Example: u'Mandos'
120
type: string; Example: u'_mandos._tcp'.
98
name: string; Example: 'Mandos'
99
type: string; Example: '_mandos._tcp'.
121
100
See <http://www.dns-sd.org/ServiceTypes.html>
122
101
port: integer; what port to announce
123
102
TXT: list of strings; TXT record for the service
126
105
max_renames: integer; maximum number of renames
127
106
rename_count: integer; counter so we only rename after collisions
128
107
a sensible number of times
129
group: D-Bus Entry Group
130
server: D-Bus Server
131
bus: dbus.SystemBus()
132
108
"""
133
109
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):
110
type = None, port = None, TXT = None, domain = "",
111
host = "", max_renames = 32768):
137
112
self.interface = interface
138
113
self.name = name
139
self.type = servicetype
114
self.type = type
140
115
self.port = port
141
self.TXT = TXT if TXT is not None else []
116
if TXT is None:
117
self.TXT = []
118
else:
119
self.TXT = TXT
142
120
self.domain = domain
143
121
self.host = host
144
122
self.rename_count = 0
145
123
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
124
def rename(self):
151
125
"""Derived from the Avahi example code"""
152
126
if self.rename_count >= self.max_renames:
153
127
logger.critical(u"No suitable Zeroconf service name found"
154
128
u" after %i retries, exiting.",
155
self.rename_count)
156
raise AvahiServiceError(u"Too many renames")
157
self.name = self.server.GetAlternativeServiceName(self.name)
129
rename_count)
130
raise AvahiServiceError("Too many renames")
131
self.name = server.GetAlternativeServiceName(self.name)
158
132
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))
133
str(self.name))
134
syslogger.setFormatter(logging.Formatter\
135
('Mandos (%s): %%(levelname)s:'
136
' %%(message)s' % self.name))
164
137
self.remove()
165
138
self.add()
166
139
self.rename_count += 1
167
140
def remove(self):
168
141
"""Derived from the Avahi example code"""
169
if self.group is not None:
170
self.group.Reset()
142
if group is not None:
143
group.Reset()
171
144
def add(self):
172
145
"""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)
146
global group
147
if group is None:
148
group = dbus.Interface\
149
(bus.get_object(avahi.DBUS_NAME,
150
server.EntryGroupNew()),
151
avahi.DBUS_INTERFACE_ENTRY_GROUP)
152
group.connect_to_signal('StateChanged',
153
entry_group_state_changed)
181
154
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())
155
service.name, service.type)
156
group.AddService(
157
self.interface, # interface
158
avahi.PROTO_INET6, # protocol
159
dbus.UInt32(0), # flags
160
self.name, self.type,
161
self.domain, self.host,
162
dbus.UInt16(self.port),
163
avahi.string_array_to_txt_array(self.TXT))
164
group.Commit()
165
166
# From the Avahi example code:
167
group = None # our entry group
168
# End of Avahi example code
228
169
229
170
230
171
class Client(object):
231
172
"""A representation of a client host served by this server.
232
233
173
Attributes:
234
name: string; from the config file, used in log messages and
235
D-Bus identifiers
174
name: string; from the config file, used in log messages
236
175
fingerprint: string (40 or 32 hexadecimal digits); used to
237
176
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.
177
secret: bytestring; sent verbatim (over TLS) to client
178
host: string; available for use by the checker command
179
created: datetime.datetime(); object creation, not client host
180
last_checked_ok: datetime.datetime() or None if not yet checked OK
181
timeout: datetime.timedelta(); How long from last_checked_ok
182
until this client is invalid
183
interval: datetime.timedelta(); How often to start a new checker
184
stop_hook: If set, called by stop() as stop_hook(self)
185
checker: subprocess.Popen(); a running checker process used
186
to see if the client lives.
187
'None' if no process is running.
251
188
checker_initiator_tag: a gobject event source tag, or None
252
disable_initiator_tag: - '' -
189
stop_initiator_tag: - '' -
253
190
checker_callback_tag: - '' -
254
191
checker_command: string; External command which is run to check if
255
192
client lives. %() expansions are done at
256
193
runtime with vars(self) as dict, so that for
257
194
instance %(name)s can be used in the command.
258
current_checker_command: string; current running checker_command
195
Private attibutes:
196
_timeout: Real variable for 'timeout'
197
_interval: Real variable for 'interval'
198
_timeout_milliseconds: Used when calling gobject.timeout_add()
199
_interval_milliseconds: - '' -
259
200
"""
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):
201
def _set_timeout(self, timeout):
202
"Setter function for 'timeout' attribute"
203
self._timeout = timeout
204
self._timeout_milliseconds = ((self.timeout.days
205
* 24 * 60 * 60 * 1000)
206
+ (self.timeout.seconds * 1000)
207
+ (self.timeout.microseconds
208
// 1000))
209
timeout = property(lambda self: self._timeout,
210
_set_timeout)
211
del _set_timeout
212
def _set_interval(self, interval):
213
"Setter function for 'interval' attribute"
214
self._interval = interval
215
self._interval_milliseconds = ((self.interval.days
216
* 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds
218
* 1000)
219
+ (self.interval.microseconds
220
// 1000))
221
interval = property(lambda self: self._interval,
222
_set_interval)
223
del _set_interval
224
def __init__(self, name = None, stop_hook=None, config={}):
277
225
"""Note: the 'checker' key in 'config' sets the
278
226
'checker_command' attribute and *not* the 'checker'
279
227
attribute."""
280
228
self.name = name
281
if config is None:
282
config = {}
283
229
logger.debug(u"Creating client %r", self.name)
284
230
# Uppercase and remove spaces from fingerprint for later
285
231
# comparison purposes with return value from the fingerprint()
286
232
# function
287
self.fingerprint = (config[u"fingerprint"].upper()
288
.replace(u" ", u""))
233
self.fingerprint = config["fingerprint"].upper()\
234
.replace(u" ", u"")
289
235
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()
236
if "secret" in config:
237
self.secret = config["secret"].decode(u"base64")
238
elif "secfile" in config:
239
sf = open(config["secfile"])
240
self.secret = sf.read()
241
sf.close()
298
242
else:
299
243
raise TypeError(u"No secret or secfile for client %s"
300
244
% 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
245
self.host = config.get("host", "")
246
self.created = datetime.datetime.now()
305
247
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
248
self.timeout = string_to_delta(config["timeout"])
249
self.interval = string_to_delta(config["interval"])
250
self.stop_hook = stop_hook
309
251
self.checker = None
310
252
self.checker_initiator_tag = None
311
self.disable_initiator_tag = None
253
self.stop_initiator_tag = None
312
254
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):
255
self.check_command = config["checker"]
256
def start(self):
318
257
"""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
258
# Schedule a new checker to be started an 'interval' from now,
324
259
# and every interval from then on.
325
self.checker_initiator_tag = (gobject.timeout_add
326
(self.interval_milliseconds(),
327
self.start_checker))
260
self.checker_initiator_tag = gobject.timeout_add\
261
(self._interval_milliseconds,
262
self.start_checker)
328
263
# Also start a new checker *right now*.
329
264
self.start_checker()
330
# Schedule a disable() when 'timeout' has passed
331
self.disable_initiator_tag = (gobject.timeout_add
332
(self.timeout_milliseconds(),
333
self.disable))
334
self.enabled = True
335
336
def disable(self):
337
"""Disable this client."""
338
if not getattr(self, "enabled", False):
265
# Schedule a stop() when 'timeout' has passed
266
self.stop_initiator_tag = gobject.timeout_add\
267
(self._timeout_milliseconds,
268
self.stop)
269
def stop(self):
270
"""Stop this client.
271
The possibility that a client might be restarted is left open,
272
but not currently used."""
273
# If this client doesn't have a secret, it is already stopped.
274
if hasattr(self, "secret") and self.secret:
275
logger.info(u"Stopping client %s", self.name)
276
self.secret = None
277
else:
339
278
return False
340
logger.info(u"Disabling client %s", self.name)
341
if getattr(self, u"disable_initiator_tag", False):
342
gobject.source_remove(self.disable_initiator_tag)
343
self.disable_initiator_tag = None
344
if getattr(self, u"checker_initiator_tag", False):
279
if getattr(self, "stop_initiator_tag", False):
280
gobject.source_remove(self.stop_initiator_tag)
281
self.stop_initiator_tag = None
282
if getattr(self, "checker_initiator_tag", False):
345
283
gobject.source_remove(self.checker_initiator_tag)
346
284
self.checker_initiator_tag = None
347
285
self.stop_checker()
348
if self.disable_hook:
349
self.disable_hook(self)
350
self.enabled = False
286
if self.stop_hook:
287
self.stop_hook(self)
351
288
# Do not run this again if called by a gobject.timeout_add
352
289
return False
353
354
290
def __del__(self):
355
self.disable_hook = None
356
self.disable()
357
358
def checker_callback(self, pid, condition, command):
291
self.stop_hook = None
292
self.stop()
293
def checker_callback(self, pid, condition):
359
294
"""The checker has completed, so take appropriate actions."""
295
now = datetime.datetime.now()
360
296
self.checker_callback_tag = None
361
297
self.checker = None
362
if os.WIFEXITED(condition):
363
exitstatus = os.WEXITSTATUS(condition)
364
if exitstatus == 0:
365
logger.info(u"Checker for %(name)s succeeded",
366
vars(self))
367
self.checked_ok()
368
else:
369
logger.info(u"Checker for %(name)s failed",
370
vars(self))
371
else:
298
if os.WIFEXITED(condition) \
299
and (os.WEXITSTATUS(condition) == 0):
300
logger.info(u"Checker for %(name)s succeeded",
301
vars(self))
302
self.last_checked_ok = now
303
gobject.source_remove(self.stop_initiator_tag)
304
self.stop_initiator_tag = gobject.timeout_add\
305
(self._timeout_milliseconds,
306
self.stop)
307
elif not os.WIFEXITED(condition):
372
308
logger.warning(u"Checker for %(name)s crashed?",
373
309
vars(self))
374
375
def checked_ok(self):
376
"""Bump up the timeout for this client.
377
378
This should only be called when the client has been seen,
379
alive and well.
380
"""
381
self.last_checked_ok = datetime.datetime.utcnow()
382
gobject.source_remove(self.disable_initiator_tag)
383
self.disable_initiator_tag = (gobject.timeout_add
384
(self.timeout_milliseconds(),
385
self.disable))
386
310
else:
311
logger.info(u"Checker for %(name)s failed",
312
vars(self))
387
313
def start_checker(self):
388
314
"""Start a new checker subprocess if one is not running.
389
390
315
If a checker already exists, leave it running and do
391
316
nothing."""
392
317
# The reason for not killing a running checker is that if we
397
322
# checkers alone, the checker would have to take more time
398
323
# than 'timeout' for the client to be declared invalid, which
399
324
# is as it should be.
400
401
# If a checker exists, make sure it is not a zombie
402
try:
403
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
404
except (AttributeError, OSError), error:
405
if (isinstance(error, OSError)
406
and error.errno != errno.ECHILD):
407
raise error
408
else:
409
if pid:
410
logger.warning(u"Checker was a zombie")
411
gobject.source_remove(self.checker_callback_tag)
412
self.checker_callback(pid, status,
413
self.current_checker_command)
414
# Start a new checker if needed
415
325
if self.checker is None:
416
326
try:
417
# In case checker_command has exactly one % operator
418
command = self.checker_command % self.host
327
# In case check_command has exactly one % operator
328
command = self.check_command % self.host
419
329
except TypeError:
420
330
# Escape attributes for the shell
421
escaped_attrs = dict((key,
422
re.escape(unicode(str(val),
423
errors=
424
u'replace')))
331
escaped_attrs = dict((key, re.escape(str(val)))
425
332
for key, val in
426
333
vars(self).iteritems())
427
334
try:
428
command = self.checker_command % escaped_attrs
335
command = self.check_command % escaped_attrs
429
336
except TypeError, error:
430
337
logger.error(u'Could not format string "%s":'
431
u' %s', self.checker_command, error)
338
u' %s', self.check_command, error)
432
339
return True # Try again later
433
self.current_checker_command = command
434
340
try:
435
341
logger.info(u"Starting checker %r for %s",
436
342
command, self.name)
440
346
# always replaced by /dev/null.)
441
347
self.checker = subprocess.Popen(command,
442
348
close_fds=True,
443
shell=True, cwd=u"/")
444
self.checker_callback_tag = (gobject.child_watch_add
445
(self.checker.pid,
446
self.checker_callback,
447
data=command))
448
# The checker may have completed before the gobject
449
# watch was added. Check for this.
450
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
451
if pid:
452
gobject.source_remove(self.checker_callback_tag)
453
self.checker_callback(pid, status, command)
349
shell=True, cwd="/")
350
self.checker_callback_tag = gobject.child_watch_add\
351
(self.checker.pid,
352
self.checker_callback)
454
353
except OSError, error:
455
354
logger.error(u"Failed to start subprocess: %s",
456
355
error)
457
356
# Re-run this periodically if run by gobject.timeout_add
458
357
return True
459
460
358
def stop_checker(self):
461
359
"""Force the checker process, if any, to stop."""
462
360
if self.checker_callback_tag:
463
361
gobject.source_remove(self.checker_callback_tag)
464
362
self.checker_callback_tag = None
465
if getattr(self, u"checker", None) is None:
363
if getattr(self, "checker", None) is None:
466
364
return
467
365
logger.debug(u"Stopping checker for %(name)s", vars(self))
468
366
try:
474
372
if error.errno != errno.ESRCH: # No such process
475
373
raise
476
374
self.checker = None
477
478
375
def still_valid(self):
479
376
"""Has the timeout not yet passed for this client?"""
480
if not getattr(self, u"enabled", False):
481
return False
482
now = datetime.datetime.utcnow()
377
now = datetime.datetime.now()
483
378
if self.last_checked_ok is None:
484
379
return now < (self.created + self.timeout)
485
380
else:
486
381
return now < (self.last_checked_ok + self.timeout)
487
382
488
383
489
def dbus_service_property(dbus_interface, signature=u"v",
490
access=u"readwrite", byte_arrays=False):
491
"""Decorators for marking methods of a DBusObjectWithProperties to
492
become properties on the D-Bus.
493
494
The decorated method will be called with no arguments by "Get"
495
and with one argument by "Set".
496
497
The parameters, where they are supported, are the same as
498
dbus.service.method, except there is only "signature", since the
499
type from Get() and the type sent to Set() is the same.
500
"""
501
def decorator(func):
502
func._dbus_is_property = True
503
func._dbus_interface = dbus_interface
504
func._dbus_signature = signature
505
func._dbus_access = access
506
func._dbus_name = func.__name__
507
if func._dbus_name.endswith(u"_dbus_property"):
508
func._dbus_name = func._dbus_name[:-14]
509
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
510
return func
511
return decorator
512
513
514
class DBusPropertyException(dbus.exceptions.DBusException):
515
"""A base class for D-Bus property-related exceptions
516
"""
517
def __unicode__(self):
518
return unicode(str(self))
519
520
521
class DBusPropertyAccessException(DBusPropertyException):
522
"""A property's access permissions disallows an operation.
523
"""
524
pass
525
526
527
class DBusPropertyNotFound(DBusPropertyException):
528
"""An attempt was made to access a non-existing property.
529
"""
530
pass
531
532
533
class DBusObjectWithProperties(dbus.service.Object):
534
"""A D-Bus object with properties.
535
536
Classes inheriting from this can use the dbus_service_property
537
decorator to expose methods as D-Bus properties. It exposes the
538
standard Get(), Set(), and GetAll() methods on the D-Bus.
539
"""
540
541
@staticmethod
542
def _is_dbus_property(obj):
543
return getattr(obj, u"_dbus_is_property", False)
544
545
def _get_all_dbus_properties(self):
546
"""Returns a generator of (name, attribute) pairs
547
"""
548
return ((prop._dbus_name, prop)
549
for name, prop in
550
inspect.getmembers(self, self._is_dbus_property))
551
552
def _get_dbus_property(self, interface_name, property_name):
553
"""Returns a bound method if one exists which is a D-Bus
554
property with the specified name and interface.
555
"""
556
for name in (property_name,
557
property_name + u"_dbus_property"):
558
prop = getattr(self, name, None)
559
if (prop is None
560
or not self._is_dbus_property(prop)
561
or prop._dbus_name != property_name
562
or (interface_name and prop._dbus_interface
563
and interface_name != prop._dbus_interface)):
564
continue
565
return prop
566
# No such property
567
raise DBusPropertyNotFound(self.dbus_object_path + u":"
568
+ interface_name + u"."
569
+ property_name)
570
571
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
572
out_signature=u"v")
573
def Get(self, interface_name, property_name):
574
"""Standard D-Bus property Get() method, see D-Bus standard.
575
"""
576
prop = self._get_dbus_property(interface_name, property_name)
577
if prop._dbus_access == u"write":
578
raise DBusPropertyAccessException(property_name)
579
value = prop()
580
if not hasattr(value, u"variant_level"):
581
return value
582
return type(value)(value, variant_level=value.variant_level+1)
583
584
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
585
def Set(self, interface_name, property_name, value):
586
"""Standard D-Bus property Set() method, see D-Bus standard.
587
"""
588
prop = self._get_dbus_property(interface_name, property_name)
589
if prop._dbus_access == u"read":
590
raise DBusPropertyAccessException(property_name)
591
if prop._dbus_get_args_options[u"byte_arrays"]:
592
value = dbus.ByteArray(''.join(unichr(byte)
593
for byte in value))
594
prop(value)
595
596
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
597
out_signature=u"a{sv}")
598
def GetAll(self, interface_name):
599
"""Standard D-Bus property GetAll() method, see D-Bus
600
standard.
601
602
Note: Will not include properties with access="write".
603
"""
604
all = {}
605
for name, prop in self._get_all_dbus_properties():
606
if (interface_name
607
and interface_name != prop._dbus_interface):
608
# Interface non-empty but did not match
609
continue
610
# Ignore write-only properties
611
if prop._dbus_access == u"write":
612
continue
613
value = prop()
614
if not hasattr(value, u"variant_level"):
615
all[name] = value
616
continue
617
all[name] = type(value)(value, variant_level=
618
value.variant_level+1)
619
return dbus.Dictionary(all, signature=u"sv")
620
621
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
622
out_signature=u"s",
623
path_keyword='object_path',
624
connection_keyword='connection')
625
def Introspect(self, object_path, connection):
626
"""Standard D-Bus method, overloaded to insert property tags.
627
"""
628
xmlstring = dbus.service.Object.Introspect(self, object_path,
629
connection)
630
document = xml.dom.minidom.parseString(xmlstring)
631
del xmlstring
632
def make_tag(document, name, prop):
633
e = document.createElement(u"property")
634
e.setAttribute(u"name", name)
635
e.setAttribute(u"type", prop._dbus_signature)
636
e.setAttribute(u"access", prop._dbus_access)
637
return e
638
for if_tag in document.getElementsByTagName(u"interface"):
639
for tag in (make_tag(document, name, prop)
640
for name, prop
641
in self._get_all_dbus_properties()
642
if prop._dbus_interface
643
== if_tag.getAttribute(u"name")):
644
if_tag.appendChild(tag)
645
# Add the names to the return values for the
646
# "org.freedesktop.DBus.Properties" methods
647
if (if_tag.getAttribute(u"name")
648
== u"org.freedesktop.DBus.Properties"):
649
for cn in if_tag.getElementsByTagName(u"method"):
650
if cn.getAttribute(u"name") == u"Get":
651
for arg in cn.getElementsByTagName(u"arg"):
652
if (arg.getAttribute(u"direction")
653
== u"out"):
654
arg.setAttribute(u"name", u"value")
655
elif cn.getAttribute(u"name") == u"GetAll":
656
for arg in cn.getElementsByTagName(u"arg"):
657
if (arg.getAttribute(u"direction")
658
== u"out"):
659
arg.setAttribute(u"name", u"props")
660
xmlstring = document.toxml(u"utf-8")
661
document.unlink()
662
return xmlstring
663
664
665
class ClientDBus(Client, DBusObjectWithProperties):
666
"""A Client class using D-Bus
667
668
Attributes:
669
dbus_object_path: dbus.ObjectPath
670
bus: dbus.SystemBus()
671
"""
672
# dbus.service.Object doesn't use super(), so we can't either.
673
674
def __init__(self, bus = None, *args, **kwargs):
675
self.bus = bus
676
Client.__init__(self, *args, **kwargs)
677
# Only now, when this client is initialized, can it show up on
678
# the D-Bus
679
self.dbus_object_path = (dbus.ObjectPath
680
(u"/clients/"
681
+ self.name.replace(u".", u"_")))
682
DBusObjectWithProperties.__init__(self, self.bus,
683
self.dbus_object_path)
684
685
@staticmethod
686
def _datetime_to_dbus(dt, variant_level=0):
687
"""Convert a UTC datetime.datetime() to a D-Bus type."""
688
return dbus.String(dt.isoformat(),
689
variant_level=variant_level)
690
691
def enable(self):
692
oldstate = getattr(self, u"enabled", False)
693
r = Client.enable(self)
694
if oldstate != self.enabled:
695
# Emit D-Bus signals
696
self.PropertyChanged(dbus.String(u"enabled"),
697
dbus.Boolean(True, variant_level=1))
698
self.PropertyChanged(
699
dbus.String(u"last_enabled"),
700
self._datetime_to_dbus(self.last_enabled,
701
variant_level=1))
702
return r
703
704
def disable(self, signal = True):
705
oldstate = getattr(self, u"enabled", False)
706
r = Client.disable(self)
707
if signal and oldstate != self.enabled:
708
# Emit D-Bus signal
709
self.PropertyChanged(dbus.String(u"enabled"),
710
dbus.Boolean(False, variant_level=1))
711
return r
712
713
def __del__(self, *args, **kwargs):
714
try:
715
self.remove_from_connection()
716
except LookupError:
717
pass
718
if hasattr(DBusObjectWithProperties, u"__del__"):
719
DBusObjectWithProperties.__del__(self, *args, **kwargs)
720
Client.__del__(self, *args, **kwargs)
721
722
def checker_callback(self, pid, condition, command,
723
*args, **kwargs):
724
self.checker_callback_tag = None
725
self.checker = None
726
# Emit D-Bus signal
727
self.PropertyChanged(dbus.String(u"checker_running"),
728
dbus.Boolean(False, variant_level=1))
729
if os.WIFEXITED(condition):
730
exitstatus = os.WEXITSTATUS(condition)
731
# Emit D-Bus signal
732
self.CheckerCompleted(dbus.Int16(exitstatus),
733
dbus.Int64(condition),
734
dbus.String(command))
735
else:
736
# Emit D-Bus signal
737
self.CheckerCompleted(dbus.Int16(-1),
738
dbus.Int64(condition),
739
dbus.String(command))
740
741
return Client.checker_callback(self, pid, condition, command,
742
*args, **kwargs)
743
744
def checked_ok(self, *args, **kwargs):
745
r = Client.checked_ok(self, *args, **kwargs)
746
# Emit D-Bus signal
747
self.PropertyChanged(
748
dbus.String(u"last_checked_ok"),
749
(self._datetime_to_dbus(self.last_checked_ok,
750
variant_level=1)))
751
return r
752
753
def start_checker(self, *args, **kwargs):
754
old_checker = self.checker
755
if self.checker is not None:
756
old_checker_pid = self.checker.pid
757
else:
758
old_checker_pid = None
759
r = Client.start_checker(self, *args, **kwargs)
760
# Only if new checker process was started
761
if (self.checker is not None
762
and old_checker_pid != self.checker.pid):
763
# Emit D-Bus signal
764
self.CheckerStarted(self.current_checker_command)
765
self.PropertyChanged(
766
dbus.String(u"checker_running"),
767
dbus.Boolean(True, variant_level=1))
768
return r
769
770
def stop_checker(self, *args, **kwargs):
771
old_checker = getattr(self, u"checker", None)
772
r = Client.stop_checker(self, *args, **kwargs)
773
if (old_checker is not None
774
and getattr(self, u"checker", None) is None):
775
self.PropertyChanged(dbus.String(u"checker_running"),
776
dbus.Boolean(False, variant_level=1))
777
return r
778
779
## D-Bus methods & signals
780
_interface = u"se.bsnet.fukt.Mandos.Client"
781
782
# CheckedOK - method
783
@dbus.service.method(_interface)
784
def CheckedOK(self):
785
return self.checked_ok()
786
787
# CheckerCompleted - signal
788
@dbus.service.signal(_interface, signature=u"nxs")
789
def CheckerCompleted(self, exitcode, waitstatus, command):
790
"D-Bus signal"
791
pass
792
793
# CheckerStarted - signal
794
@dbus.service.signal(_interface, signature=u"s")
795
def CheckerStarted(self, command):
796
"D-Bus signal"
797
pass
798
799
# PropertyChanged - signal
800
@dbus.service.signal(_interface, signature=u"sv")
801
def PropertyChanged(self, property, value):
802
"D-Bus signal"
803
pass
804
805
# ReceivedSecret - signal
806
@dbus.service.signal(_interface)
807
def ReceivedSecret(self):
808
"D-Bus signal"
809
pass
810
811
# Rejected - signal
812
@dbus.service.signal(_interface)
813
def Rejected(self):
814
"D-Bus signal"
815
pass
816
817
# Enable - method
818
@dbus.service.method(_interface)
819
def Enable(self):
820
"D-Bus method"
821
self.enable()
822
823
# StartChecker - method
824
@dbus.service.method(_interface)
825
def StartChecker(self):
826
"D-Bus method"
827
self.start_checker()
828
829
# Disable - method
830
@dbus.service.method(_interface)
831
def Disable(self):
832
"D-Bus method"
833
self.disable()
834
835
# StopChecker - method
836
@dbus.service.method(_interface)
837
def StopChecker(self):
838
self.stop_checker()
839
840
# name - property
841
@dbus_service_property(_interface, signature=u"s", access=u"read")
842
def name_dbus_property(self):
843
return dbus.String(self.name)
844
845
# fingerprint - property
846
@dbus_service_property(_interface, signature=u"s", access=u"read")
847
def fingerprint_dbus_property(self):
848
return dbus.String(self.fingerprint)
849
850
# host - property
851
@dbus_service_property(_interface, signature=u"s",
852
access=u"readwrite")
853
def host_dbus_property(self, value=None):
854
if value is None: # get
855
return dbus.String(self.host)
856
self.host = value
857
# Emit D-Bus signal
858
self.PropertyChanged(dbus.String(u"host"),
859
dbus.String(value, variant_level=1))
860
861
# created - property
862
@dbus_service_property(_interface, signature=u"s", access=u"read")
863
def created_dbus_property(self):
864
return dbus.String(self._datetime_to_dbus(self.created))
865
866
# last_enabled - property
867
@dbus_service_property(_interface, signature=u"s", access=u"read")
868
def last_enabled_dbus_property(self):
869
if self.last_enabled is None:
870
return dbus.String(u"")
871
return dbus.String(self._datetime_to_dbus(self.last_enabled))
872
873
# enabled - property
874
@dbus_service_property(_interface, signature=u"b",
875
access=u"readwrite")
876
def enabled_dbus_property(self, value=None):
877
if value is None: # get
878
return dbus.Boolean(self.enabled)
879
if value:
880
self.enable()
881
else:
882
self.disable()
883
884
# last_checked_ok - property
885
@dbus_service_property(_interface, signature=u"s",
886
access=u"readwrite")
887
def last_checked_ok_dbus_property(self, value=None):
888
if value is not None:
889
self.checked_ok()
890
return
891
if self.last_checked_ok is None:
892
return dbus.String(u"")
893
return dbus.String(self._datetime_to_dbus(self
894
.last_checked_ok))
895
896
# timeout - property
897
@dbus_service_property(_interface, signature=u"t",
898
access=u"readwrite")
899
def timeout_dbus_property(self, value=None):
900
if value is None: # get
901
return dbus.UInt64(self.timeout_milliseconds())
902
self.timeout = datetime.timedelta(0, 0, 0, value)
903
# Emit D-Bus signal
904
self.PropertyChanged(dbus.String(u"timeout"),
905
dbus.UInt64(value, variant_level=1))
906
if getattr(self, u"disable_initiator_tag", None) is None:
907
return
908
# Reschedule timeout
909
gobject.source_remove(self.disable_initiator_tag)
910
self.disable_initiator_tag = None
911
time_to_die = (self.
912
_timedelta_to_milliseconds((self
913
.last_checked_ok
914
+ self.timeout)
915
- datetime.datetime
916
.utcnow()))
917
if time_to_die <= 0:
918
# The timeout has passed
919
self.disable()
920
else:
921
self.disable_initiator_tag = (gobject.timeout_add
922
(time_to_die, self.disable))
923
924
# interval - property
925
@dbus_service_property(_interface, signature=u"t",
926
access=u"readwrite")
927
def interval_dbus_property(self, value=None):
928
if value is None: # get
929
return dbus.UInt64(self.interval_milliseconds())
930
self.interval = datetime.timedelta(0, 0, 0, value)
931
# Emit D-Bus signal
932
self.PropertyChanged(dbus.String(u"interval"),
933
dbus.UInt64(value, variant_level=1))
934
if getattr(self, u"checker_initiator_tag", None) is None:
935
return
936
# Reschedule checker run
937
gobject.source_remove(self.checker_initiator_tag)
938
self.checker_initiator_tag = (gobject.timeout_add
939
(value, self.start_checker))
940
self.start_checker() # Start one now, too
941
942
# checker - property
943
@dbus_service_property(_interface, signature=u"s",
944
access=u"readwrite")
945
def checker_dbus_property(self, value=None):
946
if value is None: # get
947
return dbus.String(self.checker_command)
948
self.checker_command = value
949
# Emit D-Bus signal
950
self.PropertyChanged(dbus.String(u"checker"),
951
dbus.String(self.checker_command,
952
variant_level=1))
953
954
# checker_running - property
955
@dbus_service_property(_interface, signature=u"b",
956
access=u"readwrite")
957
def checker_running_dbus_property(self, value=None):
958
if value is None: # get
959
return dbus.Boolean(self.checker is not None)
960
if value:
961
self.start_checker()
962
else:
963
self.stop_checker()
964
965
# object_path - property
966
@dbus_service_property(_interface, signature=u"o", access=u"read")
967
def object_path_dbus_property(self):
968
return self.dbus_object_path # is already a dbus.ObjectPath
969
970
# secret = property
971
@dbus_service_property(_interface, signature=u"ay",
972
access=u"write", byte_arrays=True)
973
def secret_dbus_property(self, value):
974
self.secret = str(value)
975
976
del _interface
977
978
979
class ClientHandler(socketserver.BaseRequestHandler, object):
980
"""A class to handle client connections.
981
982
Instantiated once for each connection to handle it.
384
def peer_certificate(session):
385
"Return the peer's OpenPGP certificate as a bytestring"
386
# If not an OpenPGP certificate...
387
if gnutls.library.functions.gnutls_certificate_type_get\
388
(session._c_object) \
389
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
390
# ...do the normal thing
391
return session.peer_certificate
392
list_size = ctypes.c_uint()
393
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
394
(session._c_object, ctypes.byref(list_size))
395
if list_size.value == 0:
396
return None
397
cert = cert_list[0]
398
return ctypes.string_at(cert.data, cert.size)
399
400
401
def fingerprint(openpgp):
402
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
403
# New GnuTLS "datum" with the OpenPGP public key
404
datum = gnutls.library.types.gnutls_datum_t\
405
(ctypes.cast(ctypes.c_char_p(openpgp),
406
ctypes.POINTER(ctypes.c_ubyte)),
407
ctypes.c_uint(len(openpgp)))
408
# New empty GnuTLS certificate
409
crt = gnutls.library.types.gnutls_openpgp_crt_t()
410
gnutls.library.functions.gnutls_openpgp_crt_init\
411
(ctypes.byref(crt))
412
# Import the OpenPGP public key into the certificate
413
gnutls.library.functions.gnutls_openpgp_crt_import\
414
(crt, ctypes.byref(datum),
415
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
416
# Verify the self signature in the key
417
crtverify = ctypes.c_uint();
418
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
419
(crt, 0, ctypes.byref(crtverify))
420
if crtverify.value != 0:
421
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
422
raise gnutls.errors.CertificateSecurityError("Verify failed")
423
# New buffer for the fingerprint
424
buffer = ctypes.create_string_buffer(20)
425
buffer_length = ctypes.c_size_t()
426
# Get the fingerprint from the certificate into the buffer
427
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
428
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
429
# Deinit the certificate
430
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
431
# Convert the buffer to a Python bytestring
432
fpr = ctypes.string_at(buffer, buffer_length.value)
433
# Convert the bytestring to hexadecimal notation
434
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
435
return hex_fpr
436
437
438
class tcp_handler(SocketServer.BaseRequestHandler, object):
439
"""A TCP request handler class.
440
Instantiated by IPv6_TCPServer for each request to handle it.
983
441
Note: This will run in its own forked process."""
984
442
985
443
def handle(self):
986
444
logger.info(u"TCP connection from: %s",
987
unicode(self.client_address))
988
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
989
# Open IPC pipe to parent process
990
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
991
session = (gnutls.connection
992
.ClientSession(self.request,
993
gnutls.connection
994
.X509Credentials()))
995
996
line = self.request.makefile().readline()
997
logger.debug(u"Protocol version: %r", line)
998
try:
999
if int(line.strip().split()[0]) > 1:
1000
raise RuntimeError
1001
except (ValueError, IndexError, RuntimeError), error:
1002
logger.error(u"Unknown protocol version: %s", error)
1003
return
1004
1005
# Note: gnutls.connection.X509Credentials is really a
1006
# generic GnuTLS certificate credentials object so long as
1007
# no X.509 keys are added to it. Therefore, we can use it
1008
# here despite using OpenPGP certificates.
1009
1010
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1011
# u"+AES-256-CBC", u"+SHA1",
1012
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1013
# u"+DHE-DSS"))
1014
# Use a fallback default, since this MUST be set.
1015
priority = self.server.gnutls_priority
1016
if priority is None:
1017
priority = u"NORMAL"
1018
(gnutls.library.functions
1019
.gnutls_priority_set_direct(session._c_object,
1020
priority, None))
1021
1022
try:
1023
session.handshake()
1024
except gnutls.errors.GNUTLSError, error:
1025
logger.warning(u"Handshake failed: %s", error)
1026
# Do not run session.bye() here: the session is not
1027
# established. Just abandon the request.
1028
return
1029
logger.debug(u"Handshake succeeded")
1030
try:
1031
fpr = self.fingerprint(self.peer_certificate(session))
1032
except (TypeError, gnutls.errors.GNUTLSError), error:
1033
logger.warning(u"Bad certificate: %s", error)
1034
session.bye()
1035
return
1036
logger.debug(u"Fingerprint: %s", fpr)
1037
1038
for c in self.server.clients:
1039
if c.fingerprint == fpr:
1040
client = c
1041
break
1042
else:
1043
ipc.write(u"NOTFOUND %s %s\n"
1044
% (fpr, unicode(self.client_address)))
1045
session.bye()
1046
return
1047
# Have to check if client.still_valid(), since it is
1048
# possible that the client timed out while establishing
1049
# the GnuTLS session.
1050
if not client.still_valid():
1051
ipc.write(u"INVALID %s\n" % client.name)
1052
session.bye()
1053
return
1054
ipc.write(u"SENDING %s\n" % client.name)
1055
sent_size = 0
1056
while sent_size < len(client.secret):
1057
sent = session.send(client.secret[sent_size:])
1058
logger.debug(u"Sent: %d, remaining: %d",
1059
sent, len(client.secret)
1060
- (sent_size + sent))
1061
sent_size += sent
1062
session.bye()
1063
1064
@staticmethod
1065
def peer_certificate(session):
1066
"Return the peer's OpenPGP certificate as a bytestring"
1067
# If not an OpenPGP certificate...
1068
if (gnutls.library.functions
1069
.gnutls_certificate_type_get(session._c_object)
1070
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1071
# ...do the normal thing
1072
return session.peer_certificate
1073
list_size = ctypes.c_uint(1)
1074
cert_list = (gnutls.library.functions
1075
.gnutls_certificate_get_peers
1076
(session._c_object, ctypes.byref(list_size)))
1077
if not bool(cert_list) and list_size.value != 0:
1078
raise gnutls.errors.GNUTLSError(u"error getting peer"
1079
u" certificate")
1080
if list_size.value == 0:
1081
return None
1082
cert = cert_list[0]
1083
return ctypes.string_at(cert.data, cert.size)
1084
1085
@staticmethod
1086
def fingerprint(openpgp):
1087
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1088
# New GnuTLS "datum" with the OpenPGP public key
1089
datum = (gnutls.library.types
1090
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1091
ctypes.POINTER
1092
(ctypes.c_ubyte)),
1093
ctypes.c_uint(len(openpgp))))
1094
# New empty GnuTLS certificate
1095
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1096
(gnutls.library.functions
1097
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1098
# Import the OpenPGP public key into the certificate
1099
(gnutls.library.functions
1100
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1101
gnutls.library.constants
1102
.GNUTLS_OPENPGP_FMT_RAW))
1103
# Verify the self signature in the key
1104
crtverify = ctypes.c_uint()
1105
(gnutls.library.functions
1106
.gnutls_openpgp_crt_verify_self(crt, 0,
1107
ctypes.byref(crtverify)))
1108
if crtverify.value != 0:
1109
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1110
raise (gnutls.errors.CertificateSecurityError
1111
(u"Verify failed"))
1112
# New buffer for the fingerprint
1113
buf = ctypes.create_string_buffer(20)
1114
buf_len = ctypes.c_size_t()
1115
# Get the fingerprint from the certificate into the buffer
1116
(gnutls.library.functions
1117
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1118
ctypes.byref(buf_len)))
1119
# Deinit the certificate
1120
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1121
# Convert the buffer to a Python bytestring
1122
fpr = ctypes.string_at(buf, buf_len.value)
1123
# Convert the bytestring to hexadecimal notation
1124
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1125
return hex_fpr
1126
1127
1128
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1129
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1130
def process_request(self, request, client_address):
1131
"""Overrides and wraps the original process_request().
1132
1133
This function creates a new pipe in self.pipe
1134
"""
1135
self.pipe = os.pipe()
1136
super(ForkingMixInWithPipe,
1137
self).process_request(request, client_address)
1138
os.close(self.pipe[1]) # close write end
1139
self.add_pipe(self.pipe[0])
1140
def add_pipe(self, pipe):
1141
"""Dummy function; override as necessary"""
1142
os.close(pipe)
1143
1144
1145
class IPv6_TCPServer(ForkingMixInWithPipe,
1146
socketserver.TCPServer, object):
1147
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1148
445
unicode(self.client_address))
446
session = gnutls.connection.ClientSession\
447
(self.request, gnutls.connection.X509Credentials())
448
449
line = self.request.makefile().readline()
450
logger.debug(u"Protocol version: %r", line)
451
try:
452
if int(line.strip().split()[0]) > 1:
453
raise RuntimeError
454
except (ValueError, IndexError, RuntimeError), error:
455
logger.error(u"Unknown protocol version: %s", error)
456
return
457
458
# Note: gnutls.connection.X509Credentials is really a generic
459
# GnuTLS certificate credentials object so long as no X.509
460
# keys are added to it. Therefore, we can use it here despite
461
# using OpenPGP certificates.
462
463
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
464
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
465
# "+DHE-DSS"))
466
priority = "NORMAL" # Fallback default, since this
467
# MUST be set.
468
if self.server.settings["priority"]:
469
priority = self.server.settings["priority"]
470
gnutls.library.functions.gnutls_priority_set_direct\
471
(session._c_object, priority, None);
472
473
try:
474
session.handshake()
475
except gnutls.errors.GNUTLSError, error:
476
logger.warning(u"Handshake failed: %s", error)
477
# Do not run session.bye() here: the session is not
478
# established. Just abandon the request.
479
return
480
try:
481
fpr = fingerprint(peer_certificate(session))
482
except (TypeError, gnutls.errors.GNUTLSError), error:
483
logger.warning(u"Bad certificate: %s", error)
484
session.bye()
485
return
486
logger.debug(u"Fingerprint: %s", fpr)
487
client = None
488
for c in self.server.clients:
489
if c.fingerprint == fpr:
490
client = c
491
break
492
if not client:
493
logger.warning(u"Client not found for fingerprint: %s",
494
fpr)
495
session.bye()
496
return
497
# Have to check if client.still_valid(), since it is possible
498
# that the client timed out while establishing the GnuTLS
499
# session.
500
if not client.still_valid():
501
logger.warning(u"Client %(name)s is invalid",
502
vars(client))
503
session.bye()
504
return
505
sent_size = 0
506
while sent_size < len(client.secret):
507
sent = session.send(client.secret[sent_size:])
508
logger.debug(u"Sent: %d, remaining: %d",
509
sent, len(client.secret)
510
- (sent_size + sent))
511
sent_size += sent
512
session.bye()
513
514
515
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
516
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1149
517
Attributes:
1150
enabled: Boolean; whether this server is activated yet
1151
interface: None or a network interface name (string)
1152
use_ipv6: Boolean; to use IPv6 or not
518
settings: Server settings
519
clients: Set() of Client objects
1153
520
"""
1154
def __init__(self, server_address, RequestHandlerClass,
1155
interface=None, use_ipv6=True):
1156
self.interface = interface
1157
if use_ipv6:
1158
self.address_family = socket.AF_INET6
1159
socketserver.TCPServer.__init__(self, server_address,
1160
RequestHandlerClass)
521
address_family = socket.AF_INET6
522
def __init__(self, *args, **kwargs):
523
if "settings" in kwargs:
524
self.settings = kwargs["settings"]
525
del kwargs["settings"]
526
if "clients" in kwargs:
527
self.clients = kwargs["clients"]
528
del kwargs["clients"]
529
return super(type(self), self).__init__(*args, **kwargs)
1161
530
def server_bind(self):
1162
531
"""This overrides the normal server_bind() function
1163
532
to bind to an interface if one was specified, and also NOT to
1164
533
bind to an address or port if they were not specified."""
1165
if self.interface is not None:
1166
if SO_BINDTODEVICE is None:
1167
logger.error(u"SO_BINDTODEVICE does not exist;"
1168
u" cannot bind to interface %s",
1169
self.interface)
1170
else:
1171
try:
1172
self.socket.setsockopt(socket.SOL_SOCKET,
1173
SO_BINDTODEVICE,
1174
str(self.interface
1175
+ u'\0'))
1176
except socket.error, error:
1177
if error[0] == errno.EPERM:
1178
logger.error(u"No permission to"
1179
u" bind to interface %s",
1180
self.interface)
1181
elif error[0] == errno.ENOPROTOOPT:
1182
logger.error(u"SO_BINDTODEVICE not available;"
1183
u" cannot bind to interface %s",
1184
self.interface)
1185
else:
1186
raise
534
if self.settings["interface"]:
535
# 25 is from /usr/include/asm-i486/socket.h
536
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
537
try:
538
self.socket.setsockopt(socket.SOL_SOCKET,
539
SO_BINDTODEVICE,
540
self.settings["interface"])
541
except socket.error, error:
542
if error[0] == errno.EPERM:
543
logger.error(u"No permission to"
544
u" bind to interface %s",
545
self.settings["interface"])
546
else:
547
raise error
1187
548
# Only bind(2) the socket if we really need to.
1188
549
if self.server_address[0] or self.server_address[1]:
1189
550
if not self.server_address[0]:
1190
if self.address_family == socket.AF_INET6:
1191
any_address = u"::" # in6addr_any
1192
else:
1193
any_address = socket.INADDR_ANY
1194
self.server_address = (any_address,
551
in6addr_any = "::"
552
self.server_address = (in6addr_any,
1195
553
self.server_address[1])
1196
554
elif not self.server_address[1]:
1197
555
self.server_address = (self.server_address[0],
1198
556
0)
1199
# if self.interface:
557
# if self.settings["interface"]:
1200
558
# self.server_address = (self.server_address[0],
1201
559
# 0, # port
1202
560
# 0, # flowinfo
1203
561
# if_nametoindex
1204
# (self.interface))
1205
return socketserver.TCPServer.server_bind(self)
1206
1207
1208
class MandosServer(IPv6_TCPServer):
1209
"""Mandos server.
1210
1211
Attributes:
1212
clients: set of Client objects
1213
gnutls_priority GnuTLS priority string
1214
use_dbus: Boolean; to emit D-Bus signals or not
1215
1216
Assumes a gobject.MainLoop event loop.
1217
"""
1218
def __init__(self, server_address, RequestHandlerClass,
1219
interface=None, use_ipv6=True, clients=None,
1220
gnutls_priority=None, use_dbus=True):
1221
self.enabled = False
1222
self.clients = clients
1223
if self.clients is None:
1224
self.clients = set()
1225
self.use_dbus = use_dbus
1226
self.gnutls_priority = gnutls_priority
1227
IPv6_TCPServer.__init__(self, server_address,
1228
RequestHandlerClass,
1229
interface = interface,
1230
use_ipv6 = use_ipv6)
1231
def server_activate(self):
1232
if self.enabled:
1233
return socketserver.TCPServer.server_activate(self)
1234
def enable(self):
1235
self.enabled = True
1236
def add_pipe(self, pipe):
1237
# Call "handle_ipc" for both data and EOF events
1238
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1239
self.handle_ipc)
1240
def handle_ipc(self, source, condition, file_objects={}):
1241
condition_names = {
1242
gobject.IO_IN: u"IN", # There is data to read.
1243
gobject.IO_OUT: u"OUT", # Data can be written (without
1244
# blocking).
1245
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1246
gobject.IO_ERR: u"ERR", # Error condition.
1247
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1248
# broken, usually for pipes and
1249
# sockets).
1250
}
1251
conditions_string = ' | '.join(name
1252
for cond, name in
1253
condition_names.iteritems()
1254
if cond & condition)
1255
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1256
conditions_string)
1257
1258
# Turn the pipe file descriptor into a Python file object
1259
if source not in file_objects:
1260
file_objects[source] = os.fdopen(source, u"r", 1)
1261
1262
# Read a line from the file object
1263
cmdline = file_objects[source].readline()
1264
if not cmdline: # Empty line means end of file
1265
# close the IPC pipe
1266
file_objects[source].close()
1267
del file_objects[source]
1268
1269
# Stop calling this function
1270
return False
1271
1272
logger.debug(u"IPC command: %r", cmdline)
1273
1274
# Parse and act on command
1275
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1276
1277
if cmd == u"NOTFOUND":
1278
logger.warning(u"Client not found for fingerprint: %s",
1279
args)
1280
if self.use_dbus:
1281
# Emit D-Bus signal
1282
mandos_dbus_service.ClientNotFound(args)
1283
elif cmd == u"INVALID":
1284
for client in self.clients:
1285
if client.name == args:
1286
logger.warning(u"Client %s is invalid", args)
1287
if self.use_dbus:
1288
# Emit D-Bus signal
1289
client.Rejected()
1290
break
1291
else:
1292
logger.error(u"Unknown client %s is invalid", args)
1293
elif cmd == u"SENDING":
1294
for client in self.clients:
1295
if client.name == args:
1296
logger.info(u"Sending secret to %s", client.name)
1297
client.checked_ok()
1298
if self.use_dbus:
1299
# Emit D-Bus signal
1300
client.ReceivedSecret()
1301
break
1302
else:
1303
logger.error(u"Sending secret to unknown client %s",
1304
args)
1305
else:
1306
logger.error(u"Unknown IPC command: %r", cmdline)
1307
1308
# Keep calling this function
1309
return True
562
# (self.settings
563
# ["interface"]))
564
return super(type(self), self).server_bind()
1310
565
1311
566
1312
567
def string_to_delta(interval):
1313
568
"""Parse a string and return a datetime.timedelta
1314
1315
>>> string_to_delta(u'7d')
569
570
>>> string_to_delta('7d')
1316
571
datetime.timedelta(7)
1317
>>> string_to_delta(u'60s')
572
>>> string_to_delta('60s')
1318
573
datetime.timedelta(0, 60)
1319
>>> string_to_delta(u'60m')
574
>>> string_to_delta('60m')
1320
575
datetime.timedelta(0, 3600)
1321
>>> string_to_delta(u'24h')
576
>>> string_to_delta('24h')
1322
577
datetime.timedelta(1)
1323
578
>>> string_to_delta(u'1w')
1324
579
datetime.timedelta(7)
1325
>>> string_to_delta(u'5m 30s')
580
>>> string_to_delta('5m 30s')
1326
581
datetime.timedelta(0, 330)
1327
582
"""
1328
583
timevalue = datetime.timedelta(0)
1329
584
for s in interval.split():
1330
585
try:
1331
suffix = unicode(s[-1])
1332
value = int(s[:-1])
586
suffix=unicode(s[-1])
587
value=int(s[:-1])
1333
588
if suffix == u"d":
1334
589
delta = datetime.timedelta(value)
1335
590
elif suffix == u"s":
1348
603
return timevalue
1349
604
1350
605
606
def server_state_changed(state):
607
"""Derived from the Avahi example code"""
608
if state == avahi.SERVER_COLLISION:
609
logger.error(u"Zeroconf server name collision")
610
service.remove()
611
elif state == avahi.SERVER_RUNNING:
612
service.add()
613
614
615
def entry_group_state_changed(state, error):
616
"""Derived from the Avahi example code"""
617
logger.debug(u"Avahi state change: %i", state)
618
619
if state == avahi.ENTRY_GROUP_ESTABLISHED:
620
logger.debug(u"Zeroconf service established.")
621
elif state == avahi.ENTRY_GROUP_COLLISION:
622
logger.warning(u"Zeroconf service name collision.")
623
service.rename()
624
elif state == avahi.ENTRY_GROUP_FAILURE:
625
logger.critical(u"Avahi: Error in group state changed %s",
626
unicode(error))
627
raise AvahiGroupError("State changed: %s", str(error))
628
1351
629
def if_nametoindex(interface):
1352
"""Call the C function if_nametoindex(), or equivalent
1353
1354
Note: This function cannot accept a unicode string."""
630
"""Call the C function if_nametoindex(), or equivalent"""
1355
631
global if_nametoindex
1356
632
try:
1357
if_nametoindex = (ctypes.cdll.LoadLibrary
1358
(ctypes.util.find_library(u"c"))
1359
.if_nametoindex)
633
if "ctypes.util" not in sys.modules:
634
import ctypes.util
635
if_nametoindex = ctypes.cdll.LoadLibrary\
636
(ctypes.util.find_library("c")).if_nametoindex
1360
637
except (OSError, AttributeError):
1361
logger.warning(u"Doing if_nametoindex the hard way")
638
if "struct" not in sys.modules:
639
import struct
640
if "fcntl" not in sys.modules:
641
import fcntl
1362
642
def if_nametoindex(interface):
1363
643
"Get an interface index the hard way, i.e. using fcntl()"
1364
644
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1365
with closing(socket.socket()) as s:
1366
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1367
struct.pack(str(u"16s16x"),
1368
interface))
1369
interface_index = struct.unpack(str(u"I"),
1370
ifreq[16:20])[0]
645
s = socket.socket()
646
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
647
struct.pack("16s16x", interface))
648
s.close()
649
interface_index = struct.unpack("I", ifreq[16:20])[0]
1371
650
return interface_index
1372
651
return if_nametoindex(interface)
1373
652
1374
653
1375
654
def daemon(nochdir = False, noclose = False):
1376
655
"""See daemon(3). Standard BSD Unix function.
1377
1378
656
This should really exist as os.daemon, but it doesn't (yet)."""
1379
657
if os.fork():
1380
658
sys.exit()
1381
659
os.setsid()
1382
660
if not nochdir:
1383
os.chdir(u"/")
661
os.chdir("/")
1384
662
if os.fork():
1385
663
sys.exit()
1386
664
if not noclose:
1388
666
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1389
667
if not stat.S_ISCHR(os.fstat(null).st_mode):
1390
668
raise OSError(errno.ENODEV,
1391
u"/dev/null not a character device")
669
"/dev/null not a character device")
1392
670
os.dup2(null, sys.stdin.fileno())
1393
671
os.dup2(null, sys.stdout.fileno())
1394
672
os.dup2(null, sys.stderr.fileno())
1397
675
1398
676
1399
677
def main():
1400
1401
##################################################################
1402
# Parsing of options, both command line and config file
1403
1404
parser = optparse.OptionParser(version = "%%prog %s" % version)
1405
parser.add_option("-i", u"--interface", type=u"string",
1406
metavar="IF", help=u"Bind to interface IF")
1407
parser.add_option("-a", u"--address", type=u"string",
1408
help=u"Address to listen for requests on")
1409
parser.add_option("-p", u"--port", type=u"int",
1410
help=u"Port number to receive requests on")
1411
parser.add_option("--check", action=u"store_true",
1412
help=u"Run self-test")
1413
parser.add_option("--debug", action=u"store_true",
1414
help=u"Debug mode; run in foreground and log to"
1415
u" terminal")
1416
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1417
u" priority string (see GnuTLS documentation)")
1418
parser.add_option("--servicename", type=u"string",
1419
metavar=u"NAME", help=u"Zeroconf service name")
1420
parser.add_option("--configdir", type=u"string",
1421
default=u"/etc/mandos", metavar=u"DIR",
1422
help=u"Directory to search for configuration"
1423
u" files")
1424
parser.add_option("--no-dbus", action=u"store_false",
1425
dest=u"use_dbus", help=u"Do not provide D-Bus"
1426
u" system bus interface")
1427
parser.add_option("--no-ipv6", action=u"store_false",
1428
dest=u"use_ipv6", help=u"Do not use IPv6")
1429
options = parser.parse_args()[0]
678
global main_loop_started
679
main_loop_started = False
680
681
parser = OptionParser(version = "%%prog %s" % version)
682
parser.add_option("-i", "--interface", type="string",
683
metavar="IF", help="Bind to interface IF")
684
parser.add_option("-a", "--address", type="string",
685
help="Address to listen for requests on")
686
parser.add_option("-p", "--port", type="int",
687
help="Port number to receive requests on")
688
parser.add_option("--check", action="store_true", default=False,
689
help="Run self-test")
690
parser.add_option("--debug", action="store_true",
691
help="Debug mode; run in foreground and log to"
692
" terminal")
693
parser.add_option("--priority", type="string", help="GnuTLS"
694
" priority string (see GnuTLS documentation)")
695
parser.add_option("--servicename", type="string", metavar="NAME",
696
help="Zeroconf service name")
697
parser.add_option("--configdir", type="string",
698
default="/etc/mandos", metavar="DIR",
699
help="Directory to search for configuration"
700
" files")
701
(options, args) = parser.parse_args()
1430
702
1431
703
if options.check:
1432
704
import doctest
1434
706
sys.exit()
1435
707
1436
708
# Default values for config file for server-global settings
1437
server_defaults = { u"interface": u"",
1438
u"address": u"",
1439
u"port": u"",
1440
u"debug": u"False",
1441
u"priority":
1442
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1443
u"servicename": u"Mandos",
1444
u"use_dbus": u"True",
1445
u"use_ipv6": u"True",
709
server_defaults = { "interface": "",
710
"address": "",
711
"port": "",
712
"debug": "False",
713
"priority":
714
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
715
"servicename": "Mandos",
1446
716
}
1447
717
1448
718
# Parse config file for server-global settings
1449
server_config = configparser.SafeConfigParser(server_defaults)
719
server_config = ConfigParser.SafeConfigParser(server_defaults)
1450
720
del server_defaults
1451
server_config.read(os.path.join(options.configdir,
1452
u"mandos.conf"))
721
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1453
722
# Convert the SafeConfigParser object to a dict
1454
723
server_settings = server_config.defaults()
1455
# Use the appropriate methods on the non-string config options
1456
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1457
server_settings[option] = server_config.getboolean(u"DEFAULT",
1458
option)
1459
if server_settings["port"]:
1460
server_settings["port"] = server_config.getint(u"DEFAULT",
1461
u"port")
724
# Use getboolean on the boolean config option
725
server_settings["debug"] = server_config.getboolean\
726
("DEFAULT", "debug")
1462
727
del server_config
1463
728
1464
729
# Override the settings from the config file with command line
1465
730
# options, if set.
1466
for option in (u"interface", u"address", u"port", u"debug",
1467
u"priority", u"servicename", u"configdir",
1468
u"use_dbus", u"use_ipv6"):
731
for option in ("interface", "address", "port", "debug",
732
"priority", "servicename", "configdir"):
1469
733
value = getattr(options, option)
1470
734
if value is not None:
1471
735
server_settings[option] = value
1472
736
del options
1473
# Force all strings to be unicode
1474
for option in server_settings.keys():
1475
if type(server_settings[option]) is str:
1476
server_settings[option] = unicode(server_settings[option])
1477
737
# Now we have our good server settings in "server_settings"
1478
738
1479
##################################################################
1480
1481
# For convenience
1482
debug = server_settings[u"debug"]
1483
use_dbus = server_settings[u"use_dbus"]
1484
use_ipv6 = server_settings[u"use_ipv6"]
739
debug = server_settings["debug"]
1485
740
1486
741
if not debug:
1487
742
syslogger.setLevel(logging.WARNING)
1488
743
console.setLevel(logging.WARNING)
1489
744
1490
if server_settings[u"servicename"] != u"Mandos":
1491
syslogger.setFormatter(logging.Formatter
1492
(u'Mandos (%s) [%%(process)d]:'
1493
u' %%(levelname)s: %%(message)s'
1494
% server_settings[u"servicename"]))
745
if server_settings["servicename"] != "Mandos":
746
syslogger.setFormatter(logging.Formatter\
747
('Mandos (%s): %%(levelname)s:'
748
' %%(message)s'
749
% server_settings["servicename"]))
1495
750
1496
751
# Parse config file with clients
1497
client_defaults = { u"timeout": u"1h",
1498
u"interval": u"5m",
1499
u"checker": u"fping -q -- %%(host)s",
1500
u"host": u"",
752
client_defaults = { "timeout": "1h",
753
"interval": "5m",
754
"checker": "fping -q -- %(host)s",
755
"host": "",
1501
756
}
1502
client_config = configparser.SafeConfigParser(client_defaults)
1503
client_config.read(os.path.join(server_settings[u"configdir"],
1504
u"clients.conf"))
1505
1506
global mandos_dbus_service
1507
mandos_dbus_service = None
1508
1509
tcp_server = MandosServer((server_settings[u"address"],
1510
server_settings[u"port"]),
1511
ClientHandler,
1512
interface=server_settings[u"interface"],
1513
use_ipv6=use_ipv6,
1514
gnutls_priority=
1515
server_settings[u"priority"],
1516
use_dbus=use_dbus)
1517
pidfilename = u"/var/run/mandos.pid"
1518
try:
1519
pidfile = open(pidfilename, u"w")
1520
except IOError:
1521
logger.error(u"Could not open file %r", pidfilename)
1522
1523
try:
1524
uid = pwd.getpwnam(u"_mandos").pw_uid
1525
gid = pwd.getpwnam(u"_mandos").pw_gid
1526
except KeyError:
1527
try:
1528
uid = pwd.getpwnam(u"mandos").pw_uid
1529
gid = pwd.getpwnam(u"mandos").pw_gid
1530
except KeyError:
1531
try:
1532
uid = pwd.getpwnam(u"nobody").pw_uid
1533
gid = pwd.getpwnam(u"nobody").pw_gid
1534
except KeyError:
1535
uid = 65534
1536
gid = 65534
1537
try:
1538
os.setgid(gid)
1539
os.setuid(uid)
1540
except OSError, error:
1541
if error[0] != errno.EPERM:
1542
raise error
1543
1544
# Enable all possible GnuTLS debugging
1545
if debug:
1546
# "Use a log level over 10 to enable all debugging options."
1547
# - GnuTLS manual
1548
gnutls.library.functions.gnutls_global_set_log_level(11)
1549
1550
@gnutls.library.types.gnutls_log_func
1551
def debug_gnutls(level, string):
1552
logger.debug(u"GnuTLS: %s", string[:-1])
1553
1554
(gnutls.library.functions
1555
.gnutls_global_set_log_function(debug_gnutls))
757
client_config = ConfigParser.SafeConfigParser(client_defaults)
758
client_config.read(os.path.join(server_settings["configdir"],
759
"clients.conf"))
760
761
global service
762
service = AvahiService(name = server_settings["servicename"],
763
type = "_mandos._tcp", );
764
if server_settings["interface"]:
765
service.interface = if_nametoindex\
766
(server_settings["interface"])
1556
767
1557
768
global main_loop
769
global bus
770
global server
1558
771
# From the Avahi example code
1559
772
DBusGMainLoop(set_as_default=True )
1560
773
main_loop = gobject.MainLoop()
1561
774
bus = dbus.SystemBus()
775
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
776
avahi.DBUS_PATH_SERVER),
777
avahi.DBUS_INTERFACE_SERVER)
1562
778
# End of Avahi example code
1563
if use_dbus:
1564
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1565
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1566
service = AvahiService(name = server_settings[u"servicename"],
1567
servicetype = u"_mandos._tcp",
1568
protocol = protocol, bus = bus)
1569
if server_settings["interface"]:
1570
service.interface = (if_nametoindex
1571
(str(server_settings[u"interface"])))
1572
1573
client_class = Client
1574
if use_dbus:
1575
client_class = functools.partial(ClientDBus, bus = bus)
1576
tcp_server.clients.update(set(
1577
client_class(name = section,
1578
config= dict(client_config.items(section)))
1579
for section in client_config.sections()))
1580
if not tcp_server.clients:
1581
logger.warning(u"No clients defined")
779
780
clients = Set()
781
def remove_from_clients(client):
782
clients.remove(client)
783
if not clients:
784
logger.critical(u"No clients left, exiting")
785
sys.exit()
786
787
clients.update(Set(Client(name = section,
788
stop_hook = remove_from_clients,
789
config
790
= dict(client_config.items(section)))
791
for section in client_config.sections()))
792
if not clients:
793
logger.critical(u"No clients defined")
794
sys.exit(1)
1582
795
1583
796
if debug:
1584
797
# Redirect stdin so all checkers get /dev/null
1592
805
# Close all input and output, do double fork, etc.
1593
806
daemon()
1594
807
808
pidfilename = "/var/run/mandos/mandos.pid"
809
pid = os.getpid()
1595
810
try:
1596
with closing(pidfile):
1597
pid = os.getpid()
1598
pidfile.write(str(pid) + "\n")
811
pidfile = open(pidfilename, "w")
812
pidfile.write(str(pid) + "\n")
813
pidfile.close()
1599
814
del pidfile
1600
except IOError:
1601
logger.error(u"Could not write to file %r with PID %d",
1602
pidfilename, pid)
1603
except NameError:
1604
# "pidfile" was never created
1605
pass
1606
del pidfilename
815
except IOError, err:
816
logger.error(u"Could not write %s file with PID %d",
817
pidfilename, os.getpid())
1607
818
1608
819
def cleanup():
1609
820
"Cleanup function; run on exit"
1610
service.cleanup()
821
global group
822
# From the Avahi example code
823
if not group is None:
824
group.Free()
825
group = None
826
# End of Avahi example code
1611
827
1612
while tcp_server.clients:
1613
client = tcp_server.clients.pop()
1614
client.disable_hook = None
1615
client.disable()
828
while clients:
829
client = clients.pop()
830
client.stop_hook = None
831
client.stop()
1616
832
1617
833
atexit.register(cleanup)
1618
834
1621
837
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1622
838
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1623
839
1624
if use_dbus:
1625
class MandosDBusService(dbus.service.Object):
1626
"""A D-Bus proxy object"""
1627
def __init__(self):
1628
dbus.service.Object.__init__(self, bus, u"/")
1629
_interface = u"se.bsnet.fukt.Mandos"
1630
1631
@dbus.service.signal(_interface, signature=u"oa{sv}")
1632
def ClientAdded(self, objpath, properties):
1633
"D-Bus signal"
1634
pass
1635
1636
@dbus.service.signal(_interface, signature=u"s")
1637
def ClientNotFound(self, fingerprint):
1638
"D-Bus signal"
1639
pass
1640
1641
@dbus.service.signal(_interface, signature=u"os")
1642
def ClientRemoved(self, objpath, name):
1643
"D-Bus signal"
1644
pass
1645
1646
@dbus.service.method(_interface, out_signature=u"ao")
1647
def GetAllClients(self):
1648
"D-Bus method"
1649
return dbus.Array(c.dbus_object_path
1650
for c in tcp_server.clients)
1651
1652
@dbus.service.method(_interface,
1653
out_signature=u"a{oa{sv}}")
1654
def GetAllClientsWithProperties(self):
1655
"D-Bus method"
1656
return dbus.Dictionary(
1657
((c.dbus_object_path, c.GetAll(u""))
1658
for c in tcp_server.clients),
1659
signature=u"oa{sv}")
1660
1661
@dbus.service.method(_interface, in_signature=u"o")
1662
def RemoveClient(self, object_path):
1663
"D-Bus method"
1664
for c in tcp_server.clients:
1665
if c.dbus_object_path == object_path:
1666
tcp_server.clients.remove(c)
1667
c.remove_from_connection()
1668
# Don't signal anything except ClientRemoved
1669
c.disable(signal=False)
1670
# Emit D-Bus signal
1671
self.ClientRemoved(object_path, c.name)
1672
return
1673
raise KeyError
1674
1675
del _interface
1676
1677
mandos_dbus_service = MandosDBusService()
1678
1679
for client in tcp_server.clients:
1680
if use_dbus:
1681
# Emit D-Bus signal
1682
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1683
client.GetAll(u""))
1684
client.enable()
1685
1686
tcp_server.enable()
1687
tcp_server.server_activate()
1688
840
for client in clients:
841
client.start()
842
843
tcp_server = IPv6_TCPServer((server_settings["address"],
844
server_settings["port"]),
845
tcp_handler,
846
settings=server_settings,
847
clients=clients)
1689
848
# Find out what port we got
1690
849
service.port = tcp_server.socket.getsockname()[1]
1691
if use_ipv6:
1692
logger.info(u"Now listening on address %r, port %d,"
1693
" flowinfo %d, scope_id %d"
1694
% tcp_server.socket.getsockname())
1695
else: # IPv4
1696
logger.info(u"Now listening on address %r, port %d"
1697
% tcp_server.socket.getsockname())
850
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
851
u" scope_id %d" % tcp_server.socket.getsockname())
1698
852
1699
853
#service.interface = tcp_server.socket.getsockname()[3]
1700
854
1701
855
try:
1702
856
# From the Avahi example code
857
server.connect_to_signal("StateChanged", server_state_changed)
1703
858
try:
1704
service.activate()
859
server_state_changed(server.GetState())
1705
860
except dbus.exceptions.DBusException, error:
1706
861
logger.critical(u"DBusException: %s", error)
1707
862
sys.exit(1)
1709
864
1710
865
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1711
866
lambda *args, **kwargs:
1712
(tcp_server.handle_request
1713
(*args[2:], **kwargs) or True))
867
tcp_server.handle_request\
868
(*args[2:], **kwargs) or True)
1714
869
1715
870
logger.debug(u"Starting main loop")
871
main_loop_started = True
1716
872
main_loop.run()
1717
873
except AvahiError, error:
1718
logger.critical(u"AvahiError: %s", error)
874
logger.critical(u"AvahiError: %s" + unicode(error))
1719
875
sys.exit(1)
1720
876
except KeyboardInterrupt:
1721
877
if debug:
1722
print >> sys.stderr
1723
logger.debug(u"Server received KeyboardInterrupt")
1724
logger.debug(u"Server exiting")
878
print
1725
879
1726
880
if __name__ == '__main__':
1727
881
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0