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- Committer: Teddy Hogeborn
- Date: 2008-10-12 07:27:43 UTC
- Revision ID: teddy@fukt.bsnet.se-20081012072743-0g7o9e5mqqv4fkob
* README: Refer to man pages of usplash, splashy, and askpass-fifo.
* debian/copyright: Rewritten to conform to
<http://wiki.debian.org/Proposals/CopyrightFormat?action=recall&rev=233>.
* mandos-keygen: Sign encrypted keys.
* debian/copyright: Rewritten to conform to
<http://wiki.debian.org/Proposals/CopyrightFormat?action=recall&rev=233>.
* mandos-keygen: Sign encrypted keys.
- files added:
- debian/mandos-client.config
- files removed:
- debian/watch
- files modified:
- INSTALL
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add", "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".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 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
30
# 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
from optparse import OptionParser
39
38
import datetime
40
39
import errno
41
40
import gnutls.crypto
44
43
import gnutls.library.functions
45
44
import gnutls.library.constants
46
45
import gnutls.library.types
47
import ConfigParser as configparser
46
import ConfigParser
48
47
import sys
49
48
import re
50
49
import os
51
50
import signal
51
from sets import Set
52
52
import subprocess
53
53
import atexit
54
54
import stat
55
55
import logging
56
56
import logging.handlers
57
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
64
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'))
65
66
version = "1.0.1"
67
68
logger = logging.Logger('mandos')
69
syslogger = logging.handlers.SysLogHandler\
70
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
71
address = "/dev/log")
72
syslogger.setFormatter(logging.Formatter\
73
('Mandos: %(levelname)s: %(message)s'))
91
74
logger.addHandler(syslogger)
92
75
93
76
console = logging.StreamHandler()
94
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
95
u' %(levelname)s:'
96
u' %(message)s'))
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
78
' %(message)s'))
97
79
logger.addHandler(console)
98
80
99
81
class AvahiError(Exception):
100
def __init__(self, value, *args, **kwargs):
82
def __init__(self, value):
101
83
self.value = value
102
super(AvahiError, self).__init__(value, *args, **kwargs)
103
def __unicode__(self):
104
return unicode(repr(self.value))
84
super(AvahiError, self).__init__()
85
def __str__(self):
86
return repr(self.value)
105
87
106
88
class AvahiServiceError(AvahiError):
107
89
pass
112
94
113
95
class AvahiService(object):
114
96
"""An Avahi (Zeroconf) service.
115
116
97
Attributes:
117
98
interface: integer; avahi.IF_UNSPEC or an interface index.
118
99
Used to optionally bind to the specified interface.
119
name: string; Example: u'Mandos'
120
type: string; Example: u'_mandos._tcp'.
100
name: string; Example: 'Mandos'
101
type: string; Example: '_mandos._tcp'.
121
102
See <http://www.dns-sd.org/ServiceTypes.html>
122
103
port: integer; what port to announce
123
104
TXT: list of strings; TXT record for the service
126
107
max_renames: integer; maximum number of renames
127
108
rename_count: integer; counter so we only rename after collisions
128
109
a sensible number of times
129
group: D-Bus Entry Group
130
server: D-Bus Server
131
bus: dbus.SystemBus()
132
110
"""
133
111
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):
112
servicetype = None, port = None, TXT = None, domain = "",
113
host = "", max_renames = 32768):
137
114
self.interface = interface
138
115
self.name = name
139
116
self.type = servicetype
140
117
self.port = port
141
self.TXT = TXT if TXT is not None else []
118
if TXT is None:
119
self.TXT = []
120
else:
121
self.TXT = TXT
142
122
self.domain = domain
143
123
self.host = host
144
124
self.rename_count = 0
145
125
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
126
def rename(self):
151
127
"""Derived from the Avahi example code"""
152
128
if self.rename_count >= self.max_renames:
153
129
logger.critical(u"No suitable Zeroconf service name found"
154
130
u" after %i retries, exiting.",
155
131
self.rename_count)
156
raise AvahiServiceError(u"Too many renames")
157
self.name = self.server.GetAlternativeServiceName(self.name)
132
raise AvahiServiceError("Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
158
134
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))
135
str(self.name))
136
syslogger.setFormatter(logging.Formatter\
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
164
139
self.remove()
165
140
self.add()
166
141
self.rename_count += 1
167
142
def remove(self):
168
143
"""Derived from the Avahi example code"""
169
if self.group is not None:
170
self.group.Reset()
144
if group is not None:
145
group.Reset()
171
146
def add(self):
172
147
"""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)
148
global group
149
if group is None:
150
group = dbus.Interface\
151
(bus.get_object(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
181
156
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())
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
228
171
229
172
230
173
class Client(object):
231
174
"""A representation of a client host served by this server.
232
233
175
Attributes:
234
name: string; from the config file, used in log messages and
235
D-Bus identifiers
176
name: string; from the config file, used in log messages
236
177
fingerprint: string (40 or 32 hexadecimal digits); used to
237
178
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.
179
secret: bytestring; sent verbatim (over TLS) to client
180
host: string; available for use by the checker command
181
created: datetime.datetime(); object creation, not client host
182
last_checked_ok: datetime.datetime() or None if not yet checked OK
183
timeout: datetime.timedelta(); How long from last_checked_ok
184
until this client is invalid
185
interval: datetime.timedelta(); How often to start a new checker
186
stop_hook: If set, called by stop() as stop_hook(self)
187
checker: subprocess.Popen(); a running checker process used
188
to see if the client lives.
189
'None' if no process is running.
251
190
checker_initiator_tag: a gobject event source tag, or None
252
disable_initiator_tag: - '' -
191
stop_initiator_tag: - '' -
253
192
checker_callback_tag: - '' -
254
193
checker_command: string; External command which is run to check if
255
194
client lives. %() expansions are done at
256
195
runtime with vars(self) as dict, so that for
257
196
instance %(name)s can be used in the command.
258
current_checker_command: string; current running checker_command
197
Private attibutes:
198
_timeout: Real variable for 'timeout'
199
_interval: Real variable for 'interval'
200
_timeout_milliseconds: Used when calling gobject.timeout_add()
201
_interval_milliseconds: - '' -
259
202
"""
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):
203
def _set_timeout(self, timeout):
204
"Setter function for 'timeout' attribute"
205
self._timeout = timeout
206
self._timeout_milliseconds = ((self.timeout.days
207
* 24 * 60 * 60 * 1000)
208
+ (self.timeout.seconds * 1000)
209
+ (self.timeout.microseconds
210
// 1000))
211
timeout = property(lambda self: self._timeout,
212
_set_timeout)
213
del _set_timeout
214
def _set_interval(self, interval):
215
"Setter function for 'interval' attribute"
216
self._interval = interval
217
self._interval_milliseconds = ((self.interval.days
218
* 24 * 60 * 60 * 1000)
219
+ (self.interval.seconds
220
* 1000)
221
+ (self.interval.microseconds
222
// 1000))
223
interval = property(lambda self: self._interval,
224
_set_interval)
225
del _set_interval
226
def __init__(self, name = None, stop_hook=None, config=None):
277
227
"""Note: the 'checker' key in 'config' sets the
278
228
'checker_command' attribute and *not* the 'checker'
279
229
attribute."""
280
self.name = name
281
230
if config is None:
282
231
config = {}
232
self.name = name
283
233
logger.debug(u"Creating client %r", self.name)
284
234
# Uppercase and remove spaces from fingerprint for later
285
235
# comparison purposes with return value from the fingerprint()
286
236
# function
287
self.fingerprint = (config[u"fingerprint"].upper()
288
.replace(u" ", u""))
237
self.fingerprint = config["fingerprint"].upper()\
238
.replace(u" ", u"")
289
239
logger.debug(u" Fingerprint: %s", self.fingerprint)
290
if u"secret" in config:
291
self.secret = config[u"secret"].decode(u"base64")
292
elif u"secfile" in config:
293
with closing(open(os.path.expanduser
294
(os.path.expandvars
295
(config[u"secfile"])))) as secfile:
296
self.secret = secfile.read()
240
if "secret" in config:
241
self.secret = config["secret"].decode(u"base64")
242
elif "secfile" in config:
243
secfile = open(os.path.expanduser(os.path.expandvars
244
(config["secfile"])))
245
self.secret = secfile.read()
246
secfile.close()
297
247
else:
298
248
raise TypeError(u"No secret or secfile for client %s"
299
249
% self.name)
300
self.host = config.get(u"host", u"")
301
self.created = datetime.datetime.utcnow()
302
self.enabled = False
303
self.last_enabled = None
250
self.host = config.get("host", "")
251
self.created = datetime.datetime.now()
304
252
self.last_checked_ok = None
305
self.timeout = string_to_delta(config[u"timeout"])
306
self.interval = string_to_delta(config[u"interval"])
307
self.disable_hook = disable_hook
253
self.timeout = string_to_delta(config["timeout"])
254
self.interval = string_to_delta(config["interval"])
255
self.stop_hook = stop_hook
308
256
self.checker = None
309
257
self.checker_initiator_tag = None
310
self.disable_initiator_tag = None
258
self.stop_initiator_tag = None
311
259
self.checker_callback_tag = None
312
self.checker_command = config[u"checker"]
313
self.current_checker_command = None
314
self.last_connect = None
315
316
def enable(self):
260
self.check_command = config["checker"]
261
def start(self):
317
262
"""Start this client's checker and timeout hooks"""
318
if getattr(self, u"enabled", False):
319
# Already enabled
320
return
321
self.last_enabled = datetime.datetime.utcnow()
322
263
# Schedule a new checker to be started an 'interval' from now,
323
264
# and every interval from then on.
324
self.checker_initiator_tag = (gobject.timeout_add
325
(self.interval_milliseconds(),
326
self.start_checker))
265
self.checker_initiator_tag = gobject.timeout_add\
266
(self._interval_milliseconds,
267
self.start_checker)
327
268
# Also start a new checker *right now*.
328
269
self.start_checker()
329
# Schedule a disable() when 'timeout' has passed
330
self.disable_initiator_tag = (gobject.timeout_add
331
(self.timeout_milliseconds(),
332
self.disable))
333
self.enabled = True
334
335
def disable(self):
336
"""Disable this client."""
337
if not getattr(self, "enabled", False):
270
# Schedule a stop() when 'timeout' has passed
271
self.stop_initiator_tag = gobject.timeout_add\
272
(self._timeout_milliseconds,
273
self.stop)
274
def stop(self):
275
"""Stop this client.
276
The possibility that a client might be restarted is left open,
277
but not currently used."""
278
# If this client doesn't have a secret, it is already stopped.
279
if hasattr(self, "secret") and self.secret:
280
logger.info(u"Stopping client %s", self.name)
281
self.secret = None
282
else:
338
283
return False
339
logger.info(u"Disabling client %s", self.name)
340
if getattr(self, u"disable_initiator_tag", False):
341
gobject.source_remove(self.disable_initiator_tag)
342
self.disable_initiator_tag = None
343
if getattr(self, u"checker_initiator_tag", False):
284
if getattr(self, "stop_initiator_tag", False):
285
gobject.source_remove(self.stop_initiator_tag)
286
self.stop_initiator_tag = None
287
if getattr(self, "checker_initiator_tag", False):
344
288
gobject.source_remove(self.checker_initiator_tag)
345
289
self.checker_initiator_tag = None
346
290
self.stop_checker()
347
if self.disable_hook:
348
self.disable_hook(self)
349
self.enabled = False
291
if self.stop_hook:
292
self.stop_hook(self)
350
293
# Do not run this again if called by a gobject.timeout_add
351
294
return False
352
353
295
def __del__(self):
354
self.disable_hook = None
355
self.disable()
356
357
def checker_callback(self, pid, condition, command):
296
self.stop_hook = None
297
self.stop()
298
def checker_callback(self, pid, condition):
358
299
"""The checker has completed, so take appropriate actions."""
300
now = datetime.datetime.now()
359
301
self.checker_callback_tag = None
360
302
self.checker = None
361
if os.WIFEXITED(condition):
362
exitstatus = os.WEXITSTATUS(condition)
363
if exitstatus == 0:
364
logger.info(u"Checker for %(name)s succeeded",
365
vars(self))
366
self.checked_ok()
367
else:
368
logger.info(u"Checker for %(name)s failed",
369
vars(self))
370
else:
303
if os.WIFEXITED(condition) \
304
and (os.WEXITSTATUS(condition) == 0):
305
logger.info(u"Checker for %(name)s succeeded",
306
vars(self))
307
self.last_checked_ok = now
308
gobject.source_remove(self.stop_initiator_tag)
309
self.stop_initiator_tag = gobject.timeout_add\
310
(self._timeout_milliseconds,
311
self.stop)
312
elif not os.WIFEXITED(condition):
371
313
logger.warning(u"Checker for %(name)s crashed?",
372
314
vars(self))
373
374
def checked_ok(self):
375
"""Bump up the timeout for this client.
376
377
This should only be called when the client has been seen,
378
alive and well.
379
"""
380
self.last_checked_ok = datetime.datetime.utcnow()
381
gobject.source_remove(self.disable_initiator_tag)
382
self.disable_initiator_tag = (gobject.timeout_add
383
(self.timeout_milliseconds(),
384
self.disable))
385
315
else:
316
logger.info(u"Checker for %(name)s failed",
317
vars(self))
386
318
def start_checker(self):
387
319
"""Start a new checker subprocess if one is not running.
388
389
320
If a checker already exists, leave it running and do
390
321
nothing."""
391
322
# The reason for not killing a running checker is that if we
396
327
# checkers alone, the checker would have to take more time
397
328
# than 'timeout' for the client to be declared invalid, which
398
329
# is as it should be.
399
400
# If a checker exists, make sure it is not a zombie
401
if self.checker is not None:
402
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
403
if pid:
404
logger.warning(u"Checker was a zombie")
405
gobject.source_remove(self.checker_callback_tag)
406
self.checker_callback(pid, status,
407
self.current_checker_command)
408
# Start a new checker if needed
409
330
if self.checker is None:
410
331
try:
411
# In case checker_command has exactly one % operator
412
command = self.checker_command % self.host
332
# In case check_command has exactly one % operator
333
command = self.check_command % self.host
413
334
except TypeError:
414
335
# Escape attributes for the shell
415
escaped_attrs = dict((key,
416
re.escape(unicode(str(val),
417
errors=
418
u'replace')))
336
escaped_attrs = dict((key, re.escape(str(val)))
419
337
for key, val in
420
338
vars(self).iteritems())
421
339
try:
422
command = self.checker_command % escaped_attrs
340
command = self.check_command % escaped_attrs
423
341
except TypeError, error:
424
342
logger.error(u'Could not format string "%s":'
425
u' %s', self.checker_command, error)
343
u' %s', self.check_command, error)
426
344
return True # Try again later
427
self.current_checker_command = command
428
345
try:
429
346
logger.info(u"Starting checker %r for %s",
430
347
command, self.name)
434
351
# always replaced by /dev/null.)
435
352
self.checker = subprocess.Popen(command,
436
353
close_fds=True,
437
shell=True, cwd=u"/")
438
self.checker_callback_tag = (gobject.child_watch_add
439
(self.checker.pid,
440
self.checker_callback,
441
data=command))
442
# The checker may have completed before the gobject
443
# watch was added. Check for this.
444
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
445
if pid:
446
gobject.source_remove(self.checker_callback_tag)
447
self.checker_callback(pid, status, command)
354
shell=True, cwd="/")
355
self.checker_callback_tag = gobject.child_watch_add\
356
(self.checker.pid,
357
self.checker_callback)
448
358
except OSError, error:
449
359
logger.error(u"Failed to start subprocess: %s",
450
360
error)
451
361
# Re-run this periodically if run by gobject.timeout_add
452
362
return True
453
454
363
def stop_checker(self):
455
364
"""Force the checker process, if any, to stop."""
456
365
if self.checker_callback_tag:
457
366
gobject.source_remove(self.checker_callback_tag)
458
367
self.checker_callback_tag = None
459
if getattr(self, u"checker", None) is None:
368
if getattr(self, "checker", None) is None:
460
369
return
461
370
logger.debug(u"Stopping checker for %(name)s", vars(self))
462
371
try:
468
377
if error.errno != errno.ESRCH: # No such process
469
378
raise
470
379
self.checker = None
471
472
380
def still_valid(self):
473
381
"""Has the timeout not yet passed for this client?"""
474
if not getattr(self, u"enabled", False):
475
return False
476
now = datetime.datetime.utcnow()
382
now = datetime.datetime.now()
477
383
if self.last_checked_ok is None:
478
384
return now < (self.created + self.timeout)
479
385
else:
480
386
return now < (self.last_checked_ok + self.timeout)
481
387
482
388
483
def dbus_service_property(dbus_interface, signature=u"v",
484
access=u"readwrite", byte_arrays=False):
485
"""Decorators for marking methods of a DBusObjectWithProperties to
486
become properties on the D-Bus.
487
488
The decorated method will be called with no arguments by "Get"
489
and with one argument by "Set".
490
491
The parameters, where they are supported, are the same as
492
dbus.service.method, except there is only "signature", since the
493
type from Get() and the type sent to Set() is the same.
494
"""
495
def decorator(func):
496
func._dbus_is_property = True
497
func._dbus_interface = dbus_interface
498
func._dbus_signature = signature
499
func._dbus_access = access
500
func._dbus_name = func.__name__
501
if func._dbus_name.endswith(u"_dbus_property"):
502
func._dbus_name = func._dbus_name[:-14]
503
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
504
return func
505
return decorator
506
507
508
class DBusPropertyException(dbus.exceptions.DBusException):
509
"""A base class for D-Bus property-related exceptions
510
"""
511
def __unicode__(self):
512
return unicode(str(self))
513
514
515
class DBusPropertyAccessException(DBusPropertyException):
516
"""A property's access permissions disallows an operation.
517
"""
518
pass
519
520
521
class DBusPropertyNotFound(DBusPropertyException):
522
"""An attempt was made to access a non-existing property.
523
"""
524
pass
525
526
527
class DBusObjectWithProperties(dbus.service.Object):
528
"""A D-Bus object with properties.
529
530
Classes inheriting from this can use the dbus_service_property
531
decorator to expose methods as D-Bus properties. It exposes the
532
standard Get(), Set(), and GetAll() methods on the D-Bus.
533
"""
534
535
@staticmethod
536
def _is_dbus_property(obj):
537
return getattr(obj, u"_dbus_is_property", False)
538
539
def _get_all_dbus_properties(self):
540
"""Returns a generator of (name, attribute) pairs
541
"""
542
return ((prop._dbus_name, prop)
543
for name, prop in
544
inspect.getmembers(self, self._is_dbus_property))
545
546
def _get_dbus_property(self, interface_name, property_name):
547
"""Returns a bound method if one exists which is a D-Bus
548
property with the specified name and interface.
549
"""
550
for name in (property_name,
551
property_name + u"_dbus_property"):
552
prop = getattr(self, name, None)
553
if (prop is None
554
or not self._is_dbus_property(prop)
555
or prop._dbus_name != property_name
556
or (interface_name and prop._dbus_interface
557
and interface_name != prop._dbus_interface)):
558
continue
559
return prop
560
# No such property
561
raise DBusPropertyNotFound(self.dbus_object_path + u":"
562
+ interface_name + u"."
563
+ property_name)
564
565
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
566
out_signature=u"v")
567
def Get(self, interface_name, property_name):
568
"""Standard D-Bus property Get() method, see D-Bus standard.
569
"""
570
prop = self._get_dbus_property(interface_name, property_name)
571
if prop._dbus_access == u"write":
572
raise DBusPropertyAccessException(property_name)
573
value = prop()
574
if not hasattr(value, u"variant_level"):
575
return value
576
return type(value)(value, variant_level=value.variant_level+1)
577
578
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
579
def Set(self, interface_name, property_name, value):
580
"""Standard D-Bus property Set() method, see D-Bus standard.
581
"""
582
prop = self._get_dbus_property(interface_name, property_name)
583
if prop._dbus_access == u"read":
584
raise DBusPropertyAccessException(property_name)
585
if prop._dbus_get_args_options[u"byte_arrays"]:
586
value = dbus.ByteArray(''.join(unichr(byte)
587
for byte in value))
588
prop(value)
589
590
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
591
out_signature=u"a{sv}")
592
def GetAll(self, interface_name):
593
"""Standard D-Bus property GetAll() method, see D-Bus
594
standard.
595
596
Note: Will not include properties with access="write".
597
"""
598
all = {}
599
for name, prop in self._get_all_dbus_properties():
600
if (interface_name
601
and interface_name != prop._dbus_interface):
602
# Interface non-empty but did not match
603
continue
604
# Ignore write-only properties
605
if prop._dbus_access == u"write":
606
continue
607
value = prop()
608
if not hasattr(value, u"variant_level"):
609
all[name] = value
610
continue
611
all[name] = type(value)(value, variant_level=
612
value.variant_level+1)
613
return dbus.Dictionary(all, signature=u"sv")
614
615
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
616
out_signature=u"s",
617
path_keyword='object_path',
618
connection_keyword='connection')
619
def Introspect(self, object_path, connection):
620
"""Standard D-Bus method, overloaded to insert property tags.
621
"""
622
xmlstring = dbus.service.Object.Introspect(self, object_path,
623
connection)
624
document = xml.dom.minidom.parseString(xmlstring)
625
del xmlstring
626
def make_tag(document, name, prop):
627
e = document.createElement(u"property")
628
e.setAttribute(u"name", name)
629
e.setAttribute(u"type", prop._dbus_signature)
630
e.setAttribute(u"access", prop._dbus_access)
631
return e
632
for if_tag in document.getElementsByTagName(u"interface"):
633
for tag in (make_tag(document, name, prop)
634
for name, prop
635
in self._get_all_dbus_properties()
636
if prop._dbus_interface
637
== if_tag.getAttribute(u"name")):
638
if_tag.appendChild(tag)
639
xmlstring = document.toxml(u"utf-8")
640
document.unlink()
641
return xmlstring
642
643
644
class ClientDBus(Client, DBusObjectWithProperties):
645
"""A Client class using D-Bus
646
647
Attributes:
648
dbus_object_path: dbus.ObjectPath
649
bus: dbus.SystemBus()
650
"""
651
# dbus.service.Object doesn't use super(), so we can't either.
652
653
def __init__(self, bus = None, *args, **kwargs):
654
self.bus = bus
655
Client.__init__(self, *args, **kwargs)
656
# Only now, when this client is initialized, can it show up on
657
# the D-Bus
658
self.dbus_object_path = (dbus.ObjectPath
659
(u"/clients/"
660
+ self.name.replace(u".", u"_")))
661
DBusObjectWithProperties.__init__(self, self.bus,
662
self.dbus_object_path)
663
664
@staticmethod
665
def _datetime_to_dbus(dt, variant_level=0):
666
"""Convert a UTC datetime.datetime() to a D-Bus type."""
667
return dbus.String(dt.isoformat(),
668
variant_level=variant_level)
669
670
def enable(self):
671
oldstate = getattr(self, u"enabled", False)
672
r = Client.enable(self)
673
if oldstate != self.enabled:
674
# Emit D-Bus signals
675
self.PropertyChanged(dbus.String(u"enabled"),
676
dbus.Boolean(True, variant_level=1))
677
self.PropertyChanged(
678
dbus.String(u"last_enabled"),
679
self._datetime_to_dbus(self.last_enabled,
680
variant_level=1))
681
return r
682
683
def disable(self, signal = True):
684
oldstate = getattr(self, u"enabled", False)
685
r = Client.disable(self)
686
if signal and oldstate != self.enabled:
687
# Emit D-Bus signal
688
self.PropertyChanged(dbus.String(u"enabled"),
689
dbus.Boolean(False, variant_level=1))
690
return r
691
692
def __del__(self, *args, **kwargs):
693
try:
694
self.remove_from_connection()
695
except LookupError:
696
pass
697
if hasattr(DBusObjectWithProperties, u"__del__"):
698
DBusObjectWithProperties.__del__(self, *args, **kwargs)
699
Client.__del__(self, *args, **kwargs)
700
701
def checker_callback(self, pid, condition, command,
702
*args, **kwargs):
703
self.checker_callback_tag = None
704
self.checker = None
705
# Emit D-Bus signal
706
self.PropertyChanged(dbus.String(u"checker_running"),
707
dbus.Boolean(False, variant_level=1))
708
if os.WIFEXITED(condition):
709
exitstatus = os.WEXITSTATUS(condition)
710
# Emit D-Bus signal
711
self.CheckerCompleted(dbus.Int16(exitstatus),
712
dbus.Int64(condition),
713
dbus.String(command))
714
else:
715
# Emit D-Bus signal
716
self.CheckerCompleted(dbus.Int16(-1),
717
dbus.Int64(condition),
718
dbus.String(command))
719
720
return Client.checker_callback(self, pid, condition, command,
721
*args, **kwargs)
722
723
def checked_ok(self, *args, **kwargs):
724
r = Client.checked_ok(self, *args, **kwargs)
725
# Emit D-Bus signal
726
self.PropertyChanged(
727
dbus.String(u"last_checked_ok"),
728
(self._datetime_to_dbus(self.last_checked_ok,
729
variant_level=1)))
730
return r
731
732
def start_checker(self, *args, **kwargs):
733
old_checker = self.checker
734
if self.checker is not None:
735
old_checker_pid = self.checker.pid
736
else:
737
old_checker_pid = None
738
r = Client.start_checker(self, *args, **kwargs)
739
# Only if new checker process was started
740
if (self.checker is not None
741
and old_checker_pid != self.checker.pid):
742
# Emit D-Bus signal
743
self.CheckerStarted(self.current_checker_command)
744
self.PropertyChanged(
745
dbus.String(u"checker_running"),
746
dbus.Boolean(True, variant_level=1))
747
return r
748
749
def stop_checker(self, *args, **kwargs):
750
old_checker = getattr(self, u"checker", None)
751
r = Client.stop_checker(self, *args, **kwargs)
752
if (old_checker is not None
753
and getattr(self, u"checker", None) is None):
754
self.PropertyChanged(dbus.String(u"checker_running"),
755
dbus.Boolean(False, variant_level=1))
756
return r
757
758
## D-Bus methods & signals
759
_interface = u"se.bsnet.fukt.Mandos.Client"
760
761
# CheckedOK - method
762
@dbus.service.method(_interface)
763
def CheckedOK(self):
764
return self.checked_ok()
765
766
# CheckerCompleted - signal
767
@dbus.service.signal(_interface, signature=u"nxs")
768
def CheckerCompleted(self, exitcode, waitstatus, command):
769
"D-Bus signal"
770
pass
771
772
# CheckerStarted - signal
773
@dbus.service.signal(_interface, signature=u"s")
774
def CheckerStarted(self, command):
775
"D-Bus signal"
776
pass
777
778
# PropertyChanged - signal
779
@dbus.service.signal(_interface, signature=u"sv")
780
def PropertyChanged(self, property, value):
781
"D-Bus signal"
782
pass
783
784
# ReceivedSecret - signal
785
@dbus.service.signal(_interface)
786
def ReceivedSecret(self):
787
"D-Bus signal"
788
pass
789
790
# Rejected - signal
791
@dbus.service.signal(_interface)
792
def Rejected(self):
793
"D-Bus signal"
794
pass
795
796
# Enable - method
797
@dbus.service.method(_interface)
798
def Enable(self):
799
"D-Bus method"
800
self.enable()
801
802
# StartChecker - method
803
@dbus.service.method(_interface)
804
def StartChecker(self):
805
"D-Bus method"
806
self.start_checker()
807
808
# Disable - method
809
@dbus.service.method(_interface)
810
def Disable(self):
811
"D-Bus method"
812
self.disable()
813
814
# StopChecker - method
815
@dbus.service.method(_interface)
816
def StopChecker(self):
817
self.stop_checker()
818
819
# name - property
820
@dbus_service_property(_interface, signature=u"s", access=u"read")
821
def name_dbus_property(self):
822
return dbus.String(self.name)
823
824
# fingerprint - property
825
@dbus_service_property(_interface, signature=u"s", access=u"read")
826
def fingerprint_dbus_property(self):
827
return dbus.String(self.fingerprint)
828
829
# host - property
830
@dbus_service_property(_interface, signature=u"s",
831
access=u"readwrite")
832
def host_dbus_property(self, value=None):
833
if value is None: # get
834
return dbus.String(self.host)
835
self.host = value
836
# Emit D-Bus signal
837
self.PropertyChanged(dbus.String(u"host"),
838
dbus.String(value, variant_level=1))
839
840
# created - property
841
@dbus_service_property(_interface, signature=u"s", access=u"read")
842
def created_dbus_property(self):
843
return dbus.String(self._datetime_to_dbus(self.created))
844
845
# last_enabled - property
846
@dbus_service_property(_interface, signature=u"s", access=u"read")
847
def last_enabled_dbus_property(self):
848
if self.last_enabled is None:
849
return dbus.String(u"")
850
return dbus.String(self._datetime_to_dbus(self.last_enabled))
851
852
# enabled - property
853
@dbus_service_property(_interface, signature=u"b",
854
access=u"readwrite")
855
def enabled_dbus_property(self, value=None):
856
if value is None: # get
857
return dbus.Boolean(self.enabled)
858
if value:
859
self.enable()
860
else:
861
self.disable()
862
863
# last_checked_ok - property
864
@dbus_service_property(_interface, signature=u"s",
865
access=u"readwrite")
866
def last_checked_ok_dbus_property(self, value=None):
867
if value is not None:
868
self.checked_ok()
869
return
870
if self.last_checked_ok is None:
871
return dbus.String(u"")
872
return dbus.String(self._datetime_to_dbus(self
873
.last_checked_ok))
874
875
# timeout - property
876
@dbus_service_property(_interface, signature=u"t",
877
access=u"readwrite")
878
def timeout_dbus_property(self, value=None):
879
if value is None: # get
880
return dbus.UInt64(self.timeout_milliseconds())
881
self.timeout = datetime.timedelta(0, 0, 0, value)
882
# Emit D-Bus signal
883
self.PropertyChanged(dbus.String(u"timeout"),
884
dbus.UInt64(value, variant_level=1))
885
if getattr(self, u"disable_initiator_tag", None) is None:
886
return
887
# Reschedule timeout
888
gobject.source_remove(self.disable_initiator_tag)
889
self.disable_initiator_tag = None
890
time_to_die = (self.
891
_timedelta_to_milliseconds((self
892
.last_checked_ok
893
+ self.timeout)
894
- datetime.datetime
895
.utcnow()))
896
if time_to_die <= 0:
897
# The timeout has passed
898
self.disable()
899
else:
900
self.disable_initiator_tag = (gobject.timeout_add
901
(time_to_die, self.disable))
902
903
# interval - property
904
@dbus_service_property(_interface, signature=u"t",
905
access=u"readwrite")
906
def interval_dbus_property(self, value=None):
907
if value is None: # get
908
return dbus.UInt64(self.interval_milliseconds())
909
self.interval = datetime.timedelta(0, 0, 0, value)
910
# Emit D-Bus signal
911
self.PropertyChanged(dbus.String(u"interval"),
912
dbus.UInt64(value, variant_level=1))
913
if getattr(self, u"checker_initiator_tag", None) is None:
914
return
915
# Reschedule checker run
916
gobject.source_remove(self.checker_initiator_tag)
917
self.checker_initiator_tag = (gobject.timeout_add
918
(value, self.start_checker))
919
self.start_checker() # Start one now, too
920
921
# checker - property
922
@dbus_service_property(_interface, signature=u"s",
923
access=u"readwrite")
924
def checker_dbus_property(self, value=None):
925
if value is None: # get
926
return dbus.String(self.checker_command)
927
self.checker_command = value
928
# Emit D-Bus signal
929
self.PropertyChanged(dbus.String(u"checker"),
930
dbus.String(self.checker_command,
931
variant_level=1))
932
933
# checker_running - property
934
@dbus_service_property(_interface, signature=u"b",
935
access=u"readwrite")
936
def checker_running_dbus_property(self, value=None):
937
if value is None: # get
938
return dbus.Boolean(self.checker is not None)
939
if value:
940
self.start_checker()
941
else:
942
self.stop_checker()
943
944
# object_path - property
945
@dbus_service_property(_interface, signature=u"o", access=u"read")
946
def object_path_dbus_property(self):
947
return self.dbus_object_path # is already a dbus.ObjectPath
948
949
# secret = property
950
@dbus_service_property(_interface, signature=u"ay",
951
access=u"write", byte_arrays=True)
952
def secret_dbus_property(self, value):
953
self.secret = str(value)
954
955
del _interface
956
957
958
class ClientHandler(socketserver.BaseRequestHandler, object):
959
"""A class to handle client connections.
960
961
Instantiated once for each connection to handle it.
389
def peer_certificate(session):
390
"Return the peer's OpenPGP certificate as a bytestring"
391
# If not an OpenPGP certificate...
392
if gnutls.library.functions.gnutls_certificate_type_get\
393
(session._c_object) \
394
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
395
# ...do the normal thing
396
return session.peer_certificate
397
list_size = ctypes.c_uint()
398
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
399
(session._c_object, ctypes.byref(list_size))
400
if list_size.value == 0:
401
return None
402
cert = cert_list[0]
403
return ctypes.string_at(cert.data, cert.size)
404
405
406
def fingerprint(openpgp):
407
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
408
# New GnuTLS "datum" with the OpenPGP public key
409
datum = gnutls.library.types.gnutls_datum_t\
410
(ctypes.cast(ctypes.c_char_p(openpgp),
411
ctypes.POINTER(ctypes.c_ubyte)),
412
ctypes.c_uint(len(openpgp)))
413
# New empty GnuTLS certificate
414
crt = gnutls.library.types.gnutls_openpgp_crt_t()
415
gnutls.library.functions.gnutls_openpgp_crt_init\
416
(ctypes.byref(crt))
417
# Import the OpenPGP public key into the certificate
418
gnutls.library.functions.gnutls_openpgp_crt_import\
419
(crt, ctypes.byref(datum),
420
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
421
# Verify the self signature in the key
422
crtverify = ctypes.c_uint()
423
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
424
(crt, 0, ctypes.byref(crtverify))
425
if crtverify.value != 0:
426
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
427
raise gnutls.errors.CertificateSecurityError("Verify failed")
428
# New buffer for the fingerprint
429
buf = ctypes.create_string_buffer(20)
430
buf_len = ctypes.c_size_t()
431
# Get the fingerprint from the certificate into the buffer
432
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
433
(crt, ctypes.byref(buf), ctypes.byref(buf_len))
434
# Deinit the certificate
435
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
436
# Convert the buffer to a Python bytestring
437
fpr = ctypes.string_at(buf, buf_len.value)
438
# Convert the bytestring to hexadecimal notation
439
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
440
return hex_fpr
441
442
443
class TCP_handler(SocketServer.BaseRequestHandler, object):
444
"""A TCP request handler class.
445
Instantiated by IPv6_TCPServer for each request to handle it.
962
446
Note: This will run in its own forked process."""
963
447
964
448
def handle(self):
965
449
logger.info(u"TCP connection from: %s",
966
unicode(self.client_address))
967
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
968
# Open IPC pipe to parent process
969
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
970
session = (gnutls.connection
971
.ClientSession(self.request,
972
gnutls.connection
973
.X509Credentials()))
974
975
line = self.request.makefile().readline()
976
logger.debug(u"Protocol version: %r", line)
977
try:
978
if int(line.strip().split()[0]) > 1:
979
raise RuntimeError
980
except (ValueError, IndexError, RuntimeError), error:
981
logger.error(u"Unknown protocol version: %s", error)
982
return
983
984
# Note: gnutls.connection.X509Credentials is really a
985
# generic GnuTLS certificate credentials object so long as
986
# no X.509 keys are added to it. Therefore, we can use it
987
# here despite using OpenPGP certificates.
988
989
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
990
# u"+AES-256-CBC", u"+SHA1",
991
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
992
# u"+DHE-DSS"))
993
# Use a fallback default, since this MUST be set.
994
priority = self.server.gnutls_priority
995
if priority is None:
996
priority = u"NORMAL"
997
(gnutls.library.functions
998
.gnutls_priority_set_direct(session._c_object,
999
priority, None))
1000
1001
try:
1002
session.handshake()
1003
except gnutls.errors.GNUTLSError, error:
1004
logger.warning(u"Handshake failed: %s", error)
1005
# Do not run session.bye() here: the session is not
1006
# established. Just abandon the request.
1007
return
1008
logger.debug(u"Handshake succeeded")
1009
try:
1010
fpr = self.fingerprint(self.peer_certificate(session))
1011
except (TypeError, gnutls.errors.GNUTLSError), error:
1012
logger.warning(u"Bad certificate: %s", error)
1013
session.bye()
1014
return
1015
logger.debug(u"Fingerprint: %s", fpr)
1016
1017
for c in self.server.clients:
1018
if c.fingerprint == fpr:
1019
client = c
1020
break
1021
else:
1022
ipc.write(u"NOTFOUND %s %s\n"
1023
% (fpr, unicode(self.client_address)))
1024
session.bye()
1025
return
1026
# Have to check if client.still_valid(), since it is
1027
# possible that the client timed out while establishing
1028
# the GnuTLS session.
1029
if not client.still_valid():
1030
ipc.write(u"INVALID %s\n" % client.name)
1031
session.bye()
1032
return
1033
ipc.write(u"SENDING %s\n" % client.name)
1034
sent_size = 0
1035
while sent_size < len(client.secret):
1036
sent = session.send(client.secret[sent_size:])
1037
logger.debug(u"Sent: %d, remaining: %d",
1038
sent, len(client.secret)
1039
- (sent_size + sent))
1040
sent_size += sent
1041
session.bye()
1042
1043
@staticmethod
1044
def peer_certificate(session):
1045
"Return the peer's OpenPGP certificate as a bytestring"
1046
# If not an OpenPGP certificate...
1047
if (gnutls.library.functions
1048
.gnutls_certificate_type_get(session._c_object)
1049
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1050
# ...do the normal thing
1051
return session.peer_certificate
1052
list_size = ctypes.c_uint(1)
1053
cert_list = (gnutls.library.functions
1054
.gnutls_certificate_get_peers
1055
(session._c_object, ctypes.byref(list_size)))
1056
if not bool(cert_list) and list_size.value != 0:
1057
raise gnutls.errors.GNUTLSError(u"error getting peer"
1058
u" certificate")
1059
if list_size.value == 0:
1060
return None
1061
cert = cert_list[0]
1062
return ctypes.string_at(cert.data, cert.size)
1063
1064
@staticmethod
1065
def fingerprint(openpgp):
1066
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1067
# New GnuTLS "datum" with the OpenPGP public key
1068
datum = (gnutls.library.types
1069
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1070
ctypes.POINTER
1071
(ctypes.c_ubyte)),
1072
ctypes.c_uint(len(openpgp))))
1073
# New empty GnuTLS certificate
1074
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1075
(gnutls.library.functions
1076
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1077
# Import the OpenPGP public key into the certificate
1078
(gnutls.library.functions
1079
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1080
gnutls.library.constants
1081
.GNUTLS_OPENPGP_FMT_RAW))
1082
# Verify the self signature in the key
1083
crtverify = ctypes.c_uint()
1084
(gnutls.library.functions
1085
.gnutls_openpgp_crt_verify_self(crt, 0,
1086
ctypes.byref(crtverify)))
1087
if crtverify.value != 0:
1088
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1089
raise (gnutls.errors.CertificateSecurityError
1090
(u"Verify failed"))
1091
# New buffer for the fingerprint
1092
buf = ctypes.create_string_buffer(20)
1093
buf_len = ctypes.c_size_t()
1094
# Get the fingerprint from the certificate into the buffer
1095
(gnutls.library.functions
1096
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1097
ctypes.byref(buf_len)))
1098
# Deinit the certificate
1099
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1100
# Convert the buffer to a Python bytestring
1101
fpr = ctypes.string_at(buf, buf_len.value)
1102
# Convert the bytestring to hexadecimal notation
1103
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1104
return hex_fpr
1105
1106
1107
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1108
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1109
def process_request(self, request, client_address):
1110
"""Overrides and wraps the original process_request().
1111
1112
This function creates a new pipe in self.pipe
1113
"""
1114
self.pipe = os.pipe()
1115
super(ForkingMixInWithPipe,
1116
self).process_request(request, client_address)
1117
os.close(self.pipe[1]) # close write end
1118
self.add_pipe(self.pipe[0])
1119
def add_pipe(self, pipe):
1120
"""Dummy function; override as necessary"""
1121
os.close(pipe)
1122
1123
1124
class IPv6_TCPServer(ForkingMixInWithPipe,
1125
socketserver.TCPServer, object):
1126
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1127
450
unicode(self.client_address))
451
session = gnutls.connection.ClientSession\
452
(self.request, gnutls.connection.X509Credentials())
453
454
line = self.request.makefile().readline()
455
logger.debug(u"Protocol version: %r", line)
456
try:
457
if int(line.strip().split()[0]) > 1:
458
raise RuntimeError
459
except (ValueError, IndexError, RuntimeError), error:
460
logger.error(u"Unknown protocol version: %s", error)
461
return
462
463
# Note: gnutls.connection.X509Credentials is really a generic
464
# GnuTLS certificate credentials object so long as no X.509
465
# keys are added to it. Therefore, we can use it here despite
466
# using OpenPGP certificates.
467
468
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
469
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
470
# "+DHE-DSS"))
471
priority = "NORMAL" # Fallback default, since this
472
# MUST be set.
473
if self.server.settings["priority"]:
474
priority = self.server.settings["priority"]
475
gnutls.library.functions.gnutls_priority_set_direct\
476
(session._c_object, priority, None)
477
478
try:
479
session.handshake()
480
except gnutls.errors.GNUTLSError, error:
481
logger.warning(u"Handshake failed: %s", error)
482
# Do not run session.bye() here: the session is not
483
# established. Just abandon the request.
484
return
485
try:
486
fpr = fingerprint(peer_certificate(session))
487
except (TypeError, gnutls.errors.GNUTLSError), error:
488
logger.warning(u"Bad certificate: %s", error)
489
session.bye()
490
return
491
logger.debug(u"Fingerprint: %s", fpr)
492
client = None
493
for c in self.server.clients:
494
if c.fingerprint == fpr:
495
client = c
496
break
497
if not client:
498
logger.warning(u"Client not found for fingerprint: %s",
499
fpr)
500
session.bye()
501
return
502
# Have to check if client.still_valid(), since it is possible
503
# that the client timed out while establishing the GnuTLS
504
# session.
505
if not client.still_valid():
506
logger.warning(u"Client %(name)s is invalid",
507
vars(client))
508
session.bye()
509
return
510
sent_size = 0
511
while sent_size < len(client.secret):
512
sent = session.send(client.secret[sent_size:])
513
logger.debug(u"Sent: %d, remaining: %d",
514
sent, len(client.secret)
515
- (sent_size + sent))
516
sent_size += sent
517
session.bye()
518
519
520
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
521
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1128
522
Attributes:
523
settings: Server settings
524
clients: Set() of Client objects
1129
525
enabled: Boolean; whether this server is activated yet
1130
interface: None or a network interface name (string)
1131
use_ipv6: Boolean; to use IPv6 or not
1132
526
"""
1133
def __init__(self, server_address, RequestHandlerClass,
1134
interface=None, use_ipv6=True):
1135
self.interface = interface
1136
if use_ipv6:
1137
self.address_family = socket.AF_INET6
1138
socketserver.TCPServer.__init__(self, server_address,
1139
RequestHandlerClass)
527
address_family = socket.AF_INET6
528
def __init__(self, *args, **kwargs):
529
if "settings" in kwargs:
530
self.settings = kwargs["settings"]
531
del kwargs["settings"]
532
if "clients" in kwargs:
533
self.clients = kwargs["clients"]
534
del kwargs["clients"]
535
self.enabled = False
536
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1140
537
def server_bind(self):
1141
538
"""This overrides the normal server_bind() function
1142
539
to bind to an interface if one was specified, and also NOT to
1143
540
bind to an address or port if they were not specified."""
1144
if self.interface is not None:
1145
if SO_BINDTODEVICE is None:
1146
logger.error(u"SO_BINDTODEVICE does not exist;"
1147
u" cannot bind to interface %s",
1148
self.interface)
1149
else:
1150
try:
1151
self.socket.setsockopt(socket.SOL_SOCKET,
1152
SO_BINDTODEVICE,
1153
str(self.interface
1154
+ u'\0'))
1155
except socket.error, error:
1156
if error[0] == errno.EPERM:
1157
logger.error(u"No permission to"
1158
u" bind to interface %s",
1159
self.interface)
1160
elif error[0] == errno.ENOPROTOOPT:
1161
logger.error(u"SO_BINDTODEVICE not available;"
1162
u" cannot bind to interface %s",
1163
self.interface)
1164
else:
1165
raise
541
if self.settings["interface"]:
542
# 25 is from /usr/include/asm-i486/socket.h
543
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
544
try:
545
self.socket.setsockopt(socket.SOL_SOCKET,
546
SO_BINDTODEVICE,
547
self.settings["interface"])
548
except socket.error, error:
549
if error[0] == errno.EPERM:
550
logger.error(u"No permission to"
551
u" bind to interface %s",
552
self.settings["interface"])
553
else:
554
raise error
1166
555
# Only bind(2) the socket if we really need to.
1167
556
if self.server_address[0] or self.server_address[1]:
1168
557
if not self.server_address[0]:
1169
if self.address_family == socket.AF_INET6:
1170
any_address = u"::" # in6addr_any
1171
else:
1172
any_address = socket.INADDR_ANY
1173
self.server_address = (any_address,
558
in6addr_any = "::"
559
self.server_address = (in6addr_any,
1174
560
self.server_address[1])
1175
561
elif not self.server_address[1]:
1176
562
self.server_address = (self.server_address[0],
1177
563
0)
1178
# if self.interface:
564
# if self.settings["interface"]:
1179
565
# self.server_address = (self.server_address[0],
1180
566
# 0, # port
1181
567
# 0, # flowinfo
1182
568
# if_nametoindex
1183
# (self.interface))
1184
return socketserver.TCPServer.server_bind(self)
1185
1186
1187
class MandosServer(IPv6_TCPServer):
1188
"""Mandos server.
1189
1190
Attributes:
1191
clients: set of Client objects
1192
gnutls_priority GnuTLS priority string
1193
use_dbus: Boolean; to emit D-Bus signals or not
1194
1195
Assumes a gobject.MainLoop event loop.
1196
"""
1197
def __init__(self, server_address, RequestHandlerClass,
1198
interface=None, use_ipv6=True, clients=None,
1199
gnutls_priority=None, use_dbus=True):
1200
self.enabled = False
1201
self.clients = clients
1202
if self.clients is None:
1203
self.clients = set()
1204
self.use_dbus = use_dbus
1205
self.gnutls_priority = gnutls_priority
1206
IPv6_TCPServer.__init__(self, server_address,
1207
RequestHandlerClass,
1208
interface = interface,
1209
use_ipv6 = use_ipv6)
569
# (self.settings
570
# ["interface"]))
571
return super(IPv6_TCPServer, self).server_bind()
1210
572
def server_activate(self):
1211
573
if self.enabled:
1212
return socketserver.TCPServer.server_activate(self)
574
return super(IPv6_TCPServer, self).server_activate()
1213
575
def enable(self):
1214
576
self.enabled = True
1215
def add_pipe(self, pipe):
1216
# Call "handle_ipc" for both data and EOF events
1217
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1218
self.handle_ipc)
1219
def handle_ipc(self, source, condition, file_objects={}):
1220
condition_names = {
1221
gobject.IO_IN: u"IN", # There is data to read.
1222
gobject.IO_OUT: u"OUT", # Data can be written (without
1223
# blocking).
1224
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1225
gobject.IO_ERR: u"ERR", # Error condition.
1226
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1227
# broken, usually for pipes and
1228
# sockets).
1229
}
1230
conditions_string = ' | '.join(name
1231
for cond, name in
1232
condition_names.iteritems()
1233
if cond & condition)
1234
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1235
conditions_string)
1236
1237
# Turn the pipe file descriptor into a Python file object
1238
if source not in file_objects:
1239
file_objects[source] = os.fdopen(source, u"r", 1)
1240
1241
# Read a line from the file object
1242
cmdline = file_objects[source].readline()
1243
if not cmdline: # Empty line means end of file
1244
# close the IPC pipe
1245
file_objects[source].close()
1246
del file_objects[source]
1247
1248
# Stop calling this function
1249
return False
1250
1251
logger.debug(u"IPC command: %r", cmdline)
1252
1253
# Parse and act on command
1254
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1255
1256
if cmd == u"NOTFOUND":
1257
logger.warning(u"Client not found for fingerprint: %s",
1258
args)
1259
if self.use_dbus:
1260
# Emit D-Bus signal
1261
mandos_dbus_service.ClientNotFound(args)
1262
elif cmd == u"INVALID":
1263
for client in self.clients:
1264
if client.name == args:
1265
logger.warning(u"Client %s is invalid", args)
1266
if self.use_dbus:
1267
# Emit D-Bus signal
1268
client.Rejected()
1269
break
1270
else:
1271
logger.error(u"Unknown client %s is invalid", args)
1272
elif cmd == u"SENDING":
1273
for client in self.clients:
1274
if client.name == args:
1275
logger.info(u"Sending secret to %s", client.name)
1276
client.checked_ok()
1277
if self.use_dbus:
1278
# Emit D-Bus signal
1279
client.ReceivedSecret()
1280
break
1281
else:
1282
logger.error(u"Sending secret to unknown client %s",
1283
args)
1284
else:
1285
logger.error(u"Unknown IPC command: %r", cmdline)
1286
1287
# Keep calling this function
1288
return True
1289
577
1290
578
1291
579
def string_to_delta(interval):
1292
580
"""Parse a string and return a datetime.timedelta
1293
1294
>>> string_to_delta(u'7d')
581
582
>>> string_to_delta('7d')
1295
583
datetime.timedelta(7)
1296
>>> string_to_delta(u'60s')
584
>>> string_to_delta('60s')
1297
585
datetime.timedelta(0, 60)
1298
>>> string_to_delta(u'60m')
586
>>> string_to_delta('60m')
1299
587
datetime.timedelta(0, 3600)
1300
>>> string_to_delta(u'24h')
588
>>> string_to_delta('24h')
1301
589
datetime.timedelta(1)
1302
590
>>> string_to_delta(u'1w')
1303
591
datetime.timedelta(7)
1304
>>> string_to_delta(u'5m 30s')
592
>>> string_to_delta('5m 30s')
1305
593
datetime.timedelta(0, 330)
1306
594
"""
1307
595
timevalue = datetime.timedelta(0)
1327
615
return timevalue
1328
616
1329
617
618
def server_state_changed(state):
619
"""Derived from the Avahi example code"""
620
if state == avahi.SERVER_COLLISION:
621
logger.error(u"Zeroconf server name collision")
622
service.remove()
623
elif state == avahi.SERVER_RUNNING:
624
service.add()
625
626
627
def entry_group_state_changed(state, error):
628
"""Derived from the Avahi example code"""
629
logger.debug(u"Avahi state change: %i", state)
630
631
if state == avahi.ENTRY_GROUP_ESTABLISHED:
632
logger.debug(u"Zeroconf service established.")
633
elif state == avahi.ENTRY_GROUP_COLLISION:
634
logger.warning(u"Zeroconf service name collision.")
635
service.rename()
636
elif state == avahi.ENTRY_GROUP_FAILURE:
637
logger.critical(u"Avahi: Error in group state changed %s",
638
unicode(error))
639
raise AvahiGroupError("State changed: %s", str(error))
640
1330
641
def if_nametoindex(interface):
1331
"""Call the C function if_nametoindex(), or equivalent
1332
1333
Note: This function cannot accept a unicode string."""
642
"""Call the C function if_nametoindex(), or equivalent"""
1334
643
global if_nametoindex
1335
644
try:
1336
if_nametoindex = (ctypes.cdll.LoadLibrary
1337
(ctypes.util.find_library(u"c"))
1338
.if_nametoindex)
645
if_nametoindex = ctypes.cdll.LoadLibrary\
646
(ctypes.util.find_library("c")).if_nametoindex
1339
647
except (OSError, AttributeError):
1340
logger.warning(u"Doing if_nametoindex the hard way")
648
if "struct" not in sys.modules:
649
import struct
650
if "fcntl" not in sys.modules:
651
import fcntl
1341
652
def if_nametoindex(interface):
1342
653
"Get an interface index the hard way, i.e. using fcntl()"
1343
654
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1344
with closing(socket.socket()) as s:
1345
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1346
struct.pack(str(u"16s16x"),
1347
interface))
1348
interface_index = struct.unpack(str(u"I"),
1349
ifreq[16:20])[0]
655
s = socket.socket()
656
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
657
struct.pack("16s16x", interface))
658
s.close()
659
interface_index = struct.unpack("I", ifreq[16:20])[0]
1350
660
return interface_index
1351
661
return if_nametoindex(interface)
1352
662
1353
663
1354
664
def daemon(nochdir = False, noclose = False):
1355
665
"""See daemon(3). Standard BSD Unix function.
1356
1357
666
This should really exist as os.daemon, but it doesn't (yet)."""
1358
667
if os.fork():
1359
668
sys.exit()
1360
669
os.setsid()
1361
670
if not nochdir:
1362
os.chdir(u"/")
671
os.chdir("/")
1363
672
if os.fork():
1364
673
sys.exit()
1365
674
if not noclose:
1367
676
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1368
677
if not stat.S_ISCHR(os.fstat(null).st_mode):
1369
678
raise OSError(errno.ENODEV,
1370
u"/dev/null not a character device")
679
"/dev/null not a character device")
1371
680
os.dup2(null, sys.stdin.fileno())
1372
681
os.dup2(null, sys.stdout.fileno())
1373
682
os.dup2(null, sys.stderr.fileno())
1376
685
1377
686
1378
687
def main():
1379
1380
##################################################################
1381
# Parsing of options, both command line and config file
1382
1383
parser = optparse.OptionParser(version = "%%prog %s" % version)
1384
parser.add_option("-i", u"--interface", type=u"string",
1385
metavar="IF", help=u"Bind to interface IF")
1386
parser.add_option("-a", u"--address", type=u"string",
1387
help=u"Address to listen for requests on")
1388
parser.add_option("-p", u"--port", type=u"int",
1389
help=u"Port number to receive requests on")
1390
parser.add_option("--check", action=u"store_true",
1391
help=u"Run self-test")
1392
parser.add_option("--debug", action=u"store_true",
1393
help=u"Debug mode; run in foreground and log to"
1394
u" terminal")
1395
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1396
u" priority string (see GnuTLS documentation)")
1397
parser.add_option("--servicename", type=u"string",
1398
metavar=u"NAME", help=u"Zeroconf service name")
1399
parser.add_option("--configdir", type=u"string",
1400
default=u"/etc/mandos", metavar=u"DIR",
1401
help=u"Directory to search for configuration"
1402
u" files")
1403
parser.add_option("--no-dbus", action=u"store_false",
1404
dest=u"use_dbus", help=u"Do not provide D-Bus"
1405
u" system bus interface")
1406
parser.add_option("--no-ipv6", action=u"store_false",
1407
dest=u"use_ipv6", help=u"Do not use IPv6")
688
parser = OptionParser(version = "%%prog %s" % version)
689
parser.add_option("-i", "--interface", type="string",
690
metavar="IF", help="Bind to interface IF")
691
parser.add_option("-a", "--address", type="string",
692
help="Address to listen for requests on")
693
parser.add_option("-p", "--port", type="int",
694
help="Port number to receive requests on")
695
parser.add_option("--check", action="store_true", default=False,
696
help="Run self-test")
697
parser.add_option("--debug", action="store_true",
698
help="Debug mode; run in foreground and log to"
699
" terminal")
700
parser.add_option("--priority", type="string", help="GnuTLS"
701
" priority string (see GnuTLS documentation)")
702
parser.add_option("--servicename", type="string", metavar="NAME",
703
help="Zeroconf service name")
704
parser.add_option("--configdir", type="string",
705
default="/etc/mandos", metavar="DIR",
706
help="Directory to search for configuration"
707
" files")
1408
708
options = parser.parse_args()[0]
1409
709
1410
710
if options.check:
1413
713
sys.exit()
1414
714
1415
715
# Default values for config file for server-global settings
1416
server_defaults = { u"interface": u"",
1417
u"address": u"",
1418
u"port": u"",
1419
u"debug": u"False",
1420
u"priority":
1421
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1422
u"servicename": u"Mandos",
1423
u"use_dbus": u"True",
1424
u"use_ipv6": u"True",
716
server_defaults = { "interface": "",
717
"address": "",
718
"port": "",
719
"debug": "False",
720
"priority":
721
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
722
"servicename": "Mandos",
1425
723
}
1426
724
1427
725
# Parse config file for server-global settings
1428
server_config = configparser.SafeConfigParser(server_defaults)
726
server_config = ConfigParser.SafeConfigParser(server_defaults)
1429
727
del server_defaults
1430
server_config.read(os.path.join(options.configdir,
1431
u"mandos.conf"))
728
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1432
729
# Convert the SafeConfigParser object to a dict
1433
730
server_settings = server_config.defaults()
1434
# Use the appropriate methods on the non-string config options
1435
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1436
server_settings[option] = server_config.getboolean(u"DEFAULT",
1437
option)
1438
if server_settings["port"]:
1439
server_settings["port"] = server_config.getint(u"DEFAULT",
1440
u"port")
731
# Use getboolean on the boolean config option
732
server_settings["debug"] = server_config.getboolean\
733
("DEFAULT", "debug")
1441
734
del server_config
1442
735
1443
736
# Override the settings from the config file with command line
1444
737
# options, if set.
1445
for option in (u"interface", u"address", u"port", u"debug",
1446
u"priority", u"servicename", u"configdir",
1447
u"use_dbus", u"use_ipv6"):
738
for option in ("interface", "address", "port", "debug",
739
"priority", "servicename", "configdir"):
1448
740
value = getattr(options, option)
1449
741
if value is not None:
1450
742
server_settings[option] = value
1451
743
del options
1452
# Force all strings to be unicode
1453
for option in server_settings.keys():
1454
if type(server_settings[option]) is str:
1455
server_settings[option] = unicode(server_settings[option])
1456
744
# Now we have our good server settings in "server_settings"
1457
745
1458
##################################################################
1459
1460
# For convenience
1461
debug = server_settings[u"debug"]
1462
use_dbus = server_settings[u"use_dbus"]
1463
use_ipv6 = server_settings[u"use_ipv6"]
746
debug = server_settings["debug"]
1464
747
1465
748
if not debug:
1466
749
syslogger.setLevel(logging.WARNING)
1467
750
console.setLevel(logging.WARNING)
1468
751
1469
if server_settings[u"servicename"] != u"Mandos":
1470
syslogger.setFormatter(logging.Formatter
1471
(u'Mandos (%s) [%%(process)d]:'
1472
u' %%(levelname)s: %%(message)s'
1473
% server_settings[u"servicename"]))
752
if server_settings["servicename"] != "Mandos":
753
syslogger.setFormatter(logging.Formatter\
754
('Mandos (%s): %%(levelname)s:'
755
' %%(message)s'
756
% server_settings["servicename"]))
1474
757
1475
758
# Parse config file with clients
1476
client_defaults = { u"timeout": u"1h",
1477
u"interval": u"5m",
1478
u"checker": u"fping -q -- %%(host)s",
1479
u"host": u"",
759
client_defaults = { "timeout": "1h",
760
"interval": "5m",
761
"checker": "fping -q -- %(host)s",
762
"host": "",
1480
763
}
1481
client_config = configparser.SafeConfigParser(client_defaults)
1482
client_config.read(os.path.join(server_settings[u"configdir"],
1483
u"clients.conf"))
1484
1485
global mandos_dbus_service
1486
mandos_dbus_service = None
1487
1488
tcp_server = MandosServer((server_settings[u"address"],
1489
server_settings[u"port"]),
1490
ClientHandler,
1491
interface=server_settings[u"interface"],
1492
use_ipv6=use_ipv6,
1493
gnutls_priority=
1494
server_settings[u"priority"],
1495
use_dbus=use_dbus)
1496
pidfilename = u"/var/run/mandos.pid"
1497
try:
1498
pidfile = open(pidfilename, u"w")
1499
except IOError:
1500
logger.error(u"Could not open file %r", pidfilename)
1501
1502
try:
1503
uid = pwd.getpwnam(u"_mandos").pw_uid
1504
gid = pwd.getpwnam(u"_mandos").pw_gid
1505
except KeyError:
1506
try:
1507
uid = pwd.getpwnam(u"mandos").pw_uid
1508
gid = pwd.getpwnam(u"mandos").pw_gid
1509
except KeyError:
1510
try:
1511
uid = pwd.getpwnam(u"nobody").pw_uid
1512
gid = pwd.getpwnam(u"nobody").pw_gid
1513
except KeyError:
1514
uid = 65534
1515
gid = 65534
1516
try:
764
client_config = ConfigParser.SafeConfigParser(client_defaults)
765
client_config.read(os.path.join(server_settings["configdir"],
766
"clients.conf"))
767
768
clients = Set()
769
tcp_server = IPv6_TCPServer((server_settings["address"],
770
server_settings["port"]),
771
TCP_handler,
772
settings=server_settings,
773
clients=clients)
774
pidfilename = "/var/run/mandos.pid"
775
try:
776
pidfile = open(pidfilename, "w")
777
except IOError, error:
778
logger.error("Could not open file %r", pidfilename)
779
780
uid = 65534
781
gid = 65534
782
try:
783
uid = pwd.getpwnam("mandos").pw_uid
784
except KeyError:
785
try:
786
uid = pwd.getpwnam("nobody").pw_uid
787
except KeyError:
788
pass
789
try:
790
gid = pwd.getpwnam("mandos").pw_gid
791
except KeyError:
792
try:
793
gid = pwd.getpwnam("nogroup").pw_gid
794
except KeyError:
795
pass
796
try:
797
os.setuid(uid)
1517
798
os.setgid(gid)
1518
os.setuid(uid)
1519
799
except OSError, error:
1520
800
if error[0] != errno.EPERM:
1521
801
raise error
1522
802
1523
# Enable all possible GnuTLS debugging
1524
if debug:
1525
# "Use a log level over 10 to enable all debugging options."
1526
# - GnuTLS manual
1527
gnutls.library.functions.gnutls_global_set_log_level(11)
1528
1529
@gnutls.library.types.gnutls_log_func
1530
def debug_gnutls(level, string):
1531
logger.debug(u"GnuTLS: %s", string[:-1])
1532
1533
(gnutls.library.functions
1534
.gnutls_global_set_log_function(debug_gnutls))
803
global service
804
service = AvahiService(name = server_settings["servicename"],
805
servicetype = "_mandos._tcp", )
806
if server_settings["interface"]:
807
service.interface = if_nametoindex\
808
(server_settings["interface"])
1535
809
1536
810
global main_loop
811
global bus
812
global server
1537
813
# From the Avahi example code
1538
814
DBusGMainLoop(set_as_default=True )
1539
815
main_loop = gobject.MainLoop()
1540
816
bus = dbus.SystemBus()
817
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
818
avahi.DBUS_PATH_SERVER),
819
avahi.DBUS_INTERFACE_SERVER)
1541
820
# End of Avahi example code
1542
if use_dbus:
1543
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1544
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1545
service = AvahiService(name = server_settings[u"servicename"],
1546
servicetype = u"_mandos._tcp",
1547
protocol = protocol, bus = bus)
1548
if server_settings["interface"]:
1549
service.interface = (if_nametoindex
1550
(str(server_settings[u"interface"])))
1551
1552
client_class = Client
1553
if use_dbus:
1554
client_class = functools.partial(ClientDBus, bus = bus)
1555
tcp_server.clients.update(set(
1556
client_class(name = section,
1557
config= dict(client_config.items(section)))
1558
for section in client_config.sections()))
1559
if not tcp_server.clients:
1560
logger.warning(u"No clients defined")
821
822
def remove_from_clients(client):
823
clients.remove(client)
824
if not clients:
825
logger.critical(u"No clients left, exiting")
826
sys.exit()
827
828
clients.update(Set(Client(name = section,
829
stop_hook = remove_from_clients,
830
config
831
= dict(client_config.items(section)))
832
for section in client_config.sections()))
833
if not clients:
834
logger.critical(u"No clients defined")
835
sys.exit(1)
1561
836
1562
837
if debug:
1563
838
# Redirect stdin so all checkers get /dev/null
1572
847
daemon()
1573
848
1574
849
try:
1575
with closing(pidfile):
1576
pid = os.getpid()
1577
pidfile.write(str(pid) + "\n")
850
pid = os.getpid()
851
pidfile.write(str(pid) + "\n")
852
pidfile.close()
1578
853
del pidfile
1579
854
except IOError:
1580
855
logger.error(u"Could not write to file %r with PID %d",
1586
861
1587
862
def cleanup():
1588
863
"Cleanup function; run on exit"
1589
service.cleanup()
864
global group
865
# From the Avahi example code
866
if not group is None:
867
group.Free()
868
group = None
869
# End of Avahi example code
1590
870
1591
while tcp_server.clients:
1592
client = tcp_server.clients.pop()
1593
client.disable_hook = None
1594
client.disable()
871
while clients:
872
client = clients.pop()
873
client.stop_hook = None
874
client.stop()
1595
875
1596
876
atexit.register(cleanup)
1597
877
1600
880
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1601
881
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1602
882
1603
if use_dbus:
1604
class MandosDBusService(dbus.service.Object):
1605
"""A D-Bus proxy object"""
1606
def __init__(self):
1607
dbus.service.Object.__init__(self, bus, u"/")
1608
_interface = u"se.bsnet.fukt.Mandos"
1609
1610
@dbus.service.signal(_interface, signature=u"oa{sv}")
1611
def ClientAdded(self, objpath, properties):
1612
"D-Bus signal"
1613
pass
1614
1615
@dbus.service.signal(_interface, signature=u"s")
1616
def ClientNotFound(self, fingerprint):
1617
"D-Bus signal"
1618
pass
1619
1620
@dbus.service.signal(_interface, signature=u"os")
1621
def ClientRemoved(self, objpath, name):
1622
"D-Bus signal"
1623
pass
1624
1625
@dbus.service.method(_interface, out_signature=u"ao")
1626
def GetAllClients(self):
1627
"D-Bus method"
1628
return dbus.Array(c.dbus_object_path
1629
for c in tcp_server.clients)
1630
1631
@dbus.service.method(_interface,
1632
out_signature=u"a{oa{sv}}")
1633
def GetAllClientsWithProperties(self):
1634
"D-Bus method"
1635
return dbus.Dictionary(
1636
((c.dbus_object_path, c.GetAll(u""))
1637
for c in tcp_server.clients),
1638
signature=u"oa{sv}")
1639
1640
@dbus.service.method(_interface, in_signature=u"o")
1641
def RemoveClient(self, object_path):
1642
"D-Bus method"
1643
for c in tcp_server.clients:
1644
if c.dbus_object_path == object_path:
1645
tcp_server.clients.remove(c)
1646
c.remove_from_connection()
1647
# Don't signal anything except ClientRemoved
1648
c.disable(signal=False)
1649
# Emit D-Bus signal
1650
self.ClientRemoved(object_path, c.name)
1651
return
1652
raise KeyError
1653
1654
del _interface
1655
1656
mandos_dbus_service = MandosDBusService()
1657
1658
for client in tcp_server.clients:
1659
if use_dbus:
1660
# Emit D-Bus signal
1661
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1662
client.GetAll(u""))
1663
client.enable()
883
for client in clients:
884
client.start()
1664
885
1665
886
tcp_server.enable()
1666
887
tcp_server.server_activate()
1667
888
1668
889
# Find out what port we got
1669
890
service.port = tcp_server.socket.getsockname()[1]
1670
if use_ipv6:
1671
logger.info(u"Now listening on address %r, port %d,"
1672
" flowinfo %d, scope_id %d"
1673
% tcp_server.socket.getsockname())
1674
else: # IPv4
1675
logger.info(u"Now listening on address %r, port %d"
1676
% tcp_server.socket.getsockname())
891
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
892
u" scope_id %d" % tcp_server.socket.getsockname())
1677
893
1678
894
#service.interface = tcp_server.socket.getsockname()[3]
1679
895
1680
896
try:
1681
897
# From the Avahi example code
898
server.connect_to_signal("StateChanged", server_state_changed)
1682
899
try:
1683
service.activate()
900
server_state_changed(server.GetState())
1684
901
except dbus.exceptions.DBusException, error:
1685
902
logger.critical(u"DBusException: %s", error)
1686
903
sys.exit(1)
1688
905
1689
906
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1690
907
lambda *args, **kwargs:
1691
(tcp_server.handle_request
1692
(*args[2:], **kwargs) or True))
908
tcp_server.handle_request\
909
(*args[2:], **kwargs) or True)
1693
910
1694
911
logger.debug(u"Starting main loop")
1695
912
main_loop.run()
1696
913
except AvahiError, error:
1697
logger.critical(u"AvahiError: %s", error)
914
logger.critical(u"AvahiError: %s" + unicode(error))
1698
915
sys.exit(1)
1699
916
except KeyboardInterrupt:
1700
917
if debug:
1701
print >> sys.stderr
1702
logger.debug(u"Server received KeyboardInterrupt")
1703
logger.debug(u"Server exiting")
918
print
1704
919
1705
920
if __name__ == '__main__':
1706
921
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0