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- Committer: Teddy Hogeborn
- Date: 2008-09-05 07:15:46 UTC
- Revision ID: teddy@fukt.bsnet.se-20080905071546-ax00hzgq40xzprn0
* Makefile (purge-client): Also remove "plugin-runner.conf".
- 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
11
11
# and some lines in "main".
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12
#
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13
# Everything else is
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# Copyright © 2008,2009 Teddy Hogeborn
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# Copyright © 2008,2009 Björn Påhlsson
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# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
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#
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# This program is free software: you can redistribute it and/or modify
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17
# it under the terms of the GNU General Public License as published by
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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
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
55
55
import stat
56
56
import logging
57
57
import logging.handlers
58
import pwd
59
from contextlib import closing
60
import struct
61
import fcntl
62
58
63
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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
71
try:
72
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
73
except AttributeError:
74
try:
75
from IN import SO_BINDTODEVICE
76
except ImportError:
77
# From /usr/include/asm/socket.h
78
SO_BINDTODEVICE = 25
79
80
81
version = "1.0.8"
82
83
logger = logging.Logger(u'mandos')
84
syslogger = (logging.handlers.SysLogHandler
85
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
86
address = "/dev/log"))
87
syslogger.setFormatter(logging.Formatter
88
(u'Mandos [%(process)d]: %(levelname)s:'
89
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'))
90
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logger.addHandler(syslogger)
91
74
92
75
console = logging.StreamHandler()
93
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
94
u' %(levelname)s:'
95
u' %(message)s'))
76
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
77
' %(message)s'))
96
78
logger.addHandler(console)
97
79
98
80
class AvahiError(Exception):
99
def __init__(self, value, *args, **kwargs):
81
def __init__(self, value):
100
82
self.value = value
101
super(AvahiError, self).__init__(value, *args, **kwargs)
102
def __unicode__(self):
103
return unicode(repr(self.value))
83
def __str__(self):
84
return repr(self.value)
104
85
105
86
class AvahiServiceError(AvahiError):
106
87
pass
111
92
112
93
class AvahiService(object):
113
94
"""An Avahi (Zeroconf) service.
114
115
95
Attributes:
116
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interface: integer; avahi.IF_UNSPEC or an interface index.
117
97
Used to optionally bind to the specified interface.
118
name: string; Example: u'Mandos'
119
type: string; Example: u'_mandos._tcp'.
98
name: string; Example: 'Mandos'
99
type: string; Example: '_mandos._tcp'.
120
100
See <http://www.dns-sd.org/ServiceTypes.html>
121
101
port: integer; what port to announce
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102
TXT: list of strings; TXT record for the service
127
107
a sensible number of times
128
108
"""
129
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def __init__(self, interface = avahi.IF_UNSPEC, name = None,
130
servicetype = None, port = None, TXT = None,
131
domain = u"", host = u"", max_renames = 32768,
132
protocol = avahi.PROTO_UNSPEC):
110
type = None, port = None, TXT = None, domain = "",
111
host = "", max_renames = 32768):
133
112
self.interface = interface
134
113
self.name = name
135
self.type = servicetype
114
self.type = type
136
115
self.port = port
137
self.TXT = TXT if TXT is not None else []
116
if TXT is None:
117
self.TXT = []
118
else:
119
self.TXT = TXT
138
120
self.domain = domain
139
121
self.host = host
140
122
self.rename_count = 0
141
123
self.max_renames = max_renames
142
self.protocol = protocol
143
124
def rename(self):
144
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"""Derived from the Avahi example code"""
145
126
if self.rename_count >= self.max_renames:
146
127
logger.critical(u"No suitable Zeroconf service name found"
147
128
u" after %i retries, exiting.",
148
self.rename_count)
149
raise AvahiServiceError(u"Too many renames")
129
rename_count)
130
raise AvahiServiceError("Too many renames")
150
131
self.name = server.GetAlternativeServiceName(self.name)
151
132
logger.info(u"Changing Zeroconf service name to %r ...",
152
self.name)
153
syslogger.setFormatter(logging.Formatter
154
(u'Mandos (%s) [%%(process)d]:'
155
u' %%(levelname)s: %%(message)s'
156
% self.name))
133
str(self.name))
134
syslogger.setFormatter(logging.Formatter\
135
('Mandos (%s): %%(levelname)s:'
136
' %%(message)s' % self.name))
157
137
self.remove()
158
138
self.add()
159
139
self.rename_count += 1
165
145
"""Derived from the Avahi example code"""
166
146
global group
167
147
if group is None:
168
group = dbus.Interface(bus.get_object
169
(avahi.DBUS_NAME,
148
group = dbus.Interface\
149
(bus.get_object(avahi.DBUS_NAME,
170
150
server.EntryGroupNew()),
171
avahi.DBUS_INTERFACE_ENTRY_GROUP)
151
avahi.DBUS_INTERFACE_ENTRY_GROUP)
172
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group.connect_to_signal('StateChanged',
173
153
entry_group_state_changed)
174
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logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
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155
service.name, service.type)
176
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group.AddService(
177
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self.interface, # interface
178
self.protocol, # protocol
158
avahi.PROTO_INET6, # protocol
179
159
dbus.UInt32(0), # flags
180
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self.name, self.type,
181
161
self.domain, self.host,
188
168
# End of Avahi example code
189
169
190
170
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def _datetime_to_dbus(dt, variant_level=0):
192
"""Convert a UTC datetime.datetime() to a D-Bus type."""
193
return dbus.String(dt.isoformat(), variant_level=variant_level)
194
195
196
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class Client(object):
197
172
"""A representation of a client host served by this server.
198
199
173
Attributes:
200
name: string; from the config file, used in log messages and
201
D-Bus identifiers
174
name: string; from the config file, used in log messages
202
175
fingerprint: string (40 or 32 hexadecimal digits); used to
203
176
uniquely identify the client
204
secret: bytestring; sent verbatim (over TLS) to client
205
host: string; available for use by the checker command
206
created: datetime.datetime(); (UTC) object creation
207
last_enabled: datetime.datetime(); (UTC)
208
enabled: bool()
209
last_checked_ok: datetime.datetime(); (UTC) or None
210
timeout: datetime.timedelta(); How long from last_checked_ok
211
until this client is invalid
212
interval: datetime.timedelta(); How often to start a new checker
213
disable_hook: If set, called by disable() as disable_hook(self)
214
checker: subprocess.Popen(); a running checker process used
215
to see if the client lives.
216
'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.
217
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checker_initiator_tag: a gobject event source tag, or None
218
disable_initiator_tag: - '' -
189
stop_initiator_tag: - '' -
219
190
checker_callback_tag: - '' -
220
191
checker_command: string; External command which is run to check if
221
192
client lives. %() expansions are done at
222
193
runtime with vars(self) as dict, so that for
223
194
instance %(name)s can be used in the command.
224
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: - '' -
225
200
"""
226
227
@staticmethod
228
def _datetime_to_milliseconds(dt):
229
"Convert a datetime.datetime() to milliseconds"
230
return ((dt.days * 24 * 60 * 60 * 1000)
231
+ (dt.seconds * 1000)
232
+ (dt.microseconds // 1000))
233
234
def timeout_milliseconds(self):
235
"Return the 'timeout' attribute in milliseconds"
236
return self._datetime_to_milliseconds(self.timeout)
237
238
def interval_milliseconds(self):
239
"Return the 'interval' attribute in milliseconds"
240
return self._datetime_to_milliseconds(self.interval)
241
242
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={}):
243
225
"""Note: the 'checker' key in 'config' sets the
244
226
'checker_command' attribute and *not* the 'checker'
245
227
attribute."""
246
228
self.name = name
247
if config is None:
248
config = {}
249
229
logger.debug(u"Creating client %r", self.name)
250
230
# Uppercase and remove spaces from fingerprint for later
251
231
# comparison purposes with return value from the fingerprint()
252
232
# function
253
self.fingerprint = (config[u"fingerprint"].upper()
254
.replace(u" ", u""))
233
self.fingerprint = config["fingerprint"].upper()\
234
.replace(u" ", u"")
255
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
256
if u"secret" in config:
257
self.secret = config[u"secret"].decode(u"base64")
258
elif u"secfile" in config:
259
with closing(open(os.path.expanduser
260
(os.path.expandvars
261
(config[u"secfile"])))) as secfile:
262
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()
263
242
else:
264
243
raise TypeError(u"No secret or secfile for client %s"
265
244
% self.name)
266
self.host = config.get(u"host", u"")
267
self.created = datetime.datetime.utcnow()
268
self.enabled = False
269
self.last_enabled = None
245
self.host = config.get("host", "")
246
self.created = datetime.datetime.now()
270
247
self.last_checked_ok = None
271
self.timeout = string_to_delta(config[u"timeout"])
272
self.interval = string_to_delta(config[u"interval"])
273
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
274
251
self.checker = None
275
252
self.checker_initiator_tag = None
276
self.disable_initiator_tag = None
253
self.stop_initiator_tag = None
277
254
self.checker_callback_tag = None
278
self.checker_command = config[u"checker"]
279
self.current_checker_command = None
280
self.last_connect = None
281
282
def enable(self):
255
self.check_command = config["checker"]
256
def start(self):
283
257
"""Start this client's checker and timeout hooks"""
284
self.last_enabled = datetime.datetime.utcnow()
285
258
# Schedule a new checker to be started an 'interval' from now,
286
259
# and every interval from then on.
287
self.checker_initiator_tag = (gobject.timeout_add
288
(self.interval_milliseconds(),
289
self.start_checker))
260
self.checker_initiator_tag = gobject.timeout_add\
261
(self._interval_milliseconds,
262
self.start_checker)
290
263
# Also start a new checker *right now*.
291
264
self.start_checker()
292
# Schedule a disable() when 'timeout' has passed
293
self.disable_initiator_tag = (gobject.timeout_add
294
(self.timeout_milliseconds(),
295
self.disable))
296
self.enabled = True
297
298
def disable(self):
299
"""Disable this client."""
300
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:
301
278
return False
302
logger.info(u"Disabling client %s", self.name)
303
if getattr(self, u"disable_initiator_tag", False):
304
gobject.source_remove(self.disable_initiator_tag)
305
self.disable_initiator_tag = None
306
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):
307
283
gobject.source_remove(self.checker_initiator_tag)
308
284
self.checker_initiator_tag = None
309
285
self.stop_checker()
310
if self.disable_hook:
311
self.disable_hook(self)
312
self.enabled = False
286
if self.stop_hook:
287
self.stop_hook(self)
313
288
# Do not run this again if called by a gobject.timeout_add
314
289
return False
315
316
290
def __del__(self):
317
self.disable_hook = None
318
self.disable()
319
320
def checker_callback(self, pid, condition, command):
291
self.stop_hook = None
292
self.stop()
293
def checker_callback(self, pid, condition):
321
294
"""The checker has completed, so take appropriate actions."""
295
now = datetime.datetime.now()
322
296
self.checker_callback_tag = None
323
297
self.checker = None
324
if os.WIFEXITED(condition):
325
exitstatus = os.WEXITSTATUS(condition)
326
if exitstatus == 0:
327
logger.info(u"Checker for %(name)s succeeded",
328
vars(self))
329
self.checked_ok()
330
else:
331
logger.info(u"Checker for %(name)s failed",
332
vars(self))
333
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):
334
308
logger.warning(u"Checker for %(name)s crashed?",
335
309
vars(self))
336
337
def checked_ok(self):
338
"""Bump up the timeout for this client.
339
340
This should only be called when the client has been seen,
341
alive and well.
342
"""
343
self.last_checked_ok = datetime.datetime.utcnow()
344
gobject.source_remove(self.disable_initiator_tag)
345
self.disable_initiator_tag = (gobject.timeout_add
346
(self.timeout_milliseconds(),
347
self.disable))
348
310
else:
311
logger.info(u"Checker for %(name)s failed",
312
vars(self))
349
313
def start_checker(self):
350
314
"""Start a new checker subprocess if one is not running.
351
352
315
If a checker already exists, leave it running and do
353
316
nothing."""
354
317
# The reason for not killing a running checker is that if we
359
322
# checkers alone, the checker would have to take more time
360
323
# than 'timeout' for the client to be declared invalid, which
361
324
# is as it should be.
362
363
# If a checker exists, make sure it is not a zombie
364
if self.checker is not None:
365
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
366
if pid:
367
logger.warning(u"Checker was a zombie")
368
gobject.source_remove(self.checker_callback_tag)
369
self.checker_callback(pid, status,
370
self.current_checker_command)
371
# Start a new checker if needed
372
325
if self.checker is None:
373
326
try:
374
# In case checker_command has exactly one % operator
375
command = self.checker_command % self.host
327
# In case check_command has exactly one % operator
328
command = self.check_command % self.host
376
329
except TypeError:
377
330
# Escape attributes for the shell
378
escaped_attrs = dict((key,
379
re.escape(unicode(str(val),
380
errors=
381
u'replace')))
331
escaped_attrs = dict((key, re.escape(str(val)))
382
332
for key, val in
383
333
vars(self).iteritems())
384
334
try:
385
command = self.checker_command % escaped_attrs
335
command = self.check_command % escaped_attrs
386
336
except TypeError, error:
387
337
logger.error(u'Could not format string "%s":'
388
u' %s', self.checker_command, error)
338
u' %s', self.check_command, error)
389
339
return True # Try again later
390
self.current_checker_command = command
391
340
try:
392
341
logger.info(u"Starting checker %r for %s",
393
342
command, self.name)
397
346
# always replaced by /dev/null.)
398
347
self.checker = subprocess.Popen(command,
399
348
close_fds=True,
400
shell=True, cwd=u"/")
401
self.checker_callback_tag = (gobject.child_watch_add
402
(self.checker.pid,
403
self.checker_callback,
404
data=command))
405
# The checker may have completed before the gobject
406
# watch was added. Check for this.
407
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
408
if pid:
409
gobject.source_remove(self.checker_callback_tag)
410
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)
411
353
except OSError, error:
412
354
logger.error(u"Failed to start subprocess: %s",
413
355
error)
414
356
# Re-run this periodically if run by gobject.timeout_add
415
357
return True
416
417
358
def stop_checker(self):
418
359
"""Force the checker process, if any, to stop."""
419
360
if self.checker_callback_tag:
420
361
gobject.source_remove(self.checker_callback_tag)
421
362
self.checker_callback_tag = None
422
if getattr(self, u"checker", None) is None:
363
if getattr(self, "checker", None) is None:
423
364
return
424
365
logger.debug(u"Stopping checker for %(name)s", vars(self))
425
366
try:
431
372
if error.errno != errno.ESRCH: # No such process
432
373
raise
433
374
self.checker = None
434
435
375
def still_valid(self):
436
376
"""Has the timeout not yet passed for this client?"""
437
if not getattr(self, u"enabled", False):
438
return False
439
now = datetime.datetime.utcnow()
377
now = datetime.datetime.now()
440
378
if self.last_checked_ok is None:
441
379
return now < (self.created + self.timeout)
442
380
else:
443
381
return now < (self.last_checked_ok + self.timeout)
444
382
445
383
446
class ClientDBus(Client, dbus.service.Object):
447
"""A Client class using D-Bus
448
449
Attributes:
450
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
451
"""
452
# dbus.service.Object doesn't use super(), so we can't either.
453
454
def __init__(self, *args, **kwargs):
455
Client.__init__(self, *args, **kwargs)
456
# Only now, when this client is initialized, can it show up on
457
# the D-Bus
458
self.dbus_object_path = (dbus.ObjectPath
459
(u"/clients/"
460
+ self.name.replace(u".", u"_")))
461
dbus.service.Object.__init__(self, bus,
462
self.dbus_object_path)
463
def enable(self):
464
oldstate = getattr(self, u"enabled", False)
465
r = Client.enable(self)
466
if oldstate != self.enabled:
467
# Emit D-Bus signals
468
self.PropertyChanged(dbus.String(u"enabled"),
469
dbus.Boolean(True, variant_level=1))
470
self.PropertyChanged(dbus.String(u"last_enabled"),
471
(_datetime_to_dbus(self.last_enabled,
472
variant_level=1)))
473
return r
474
475
def disable(self, signal = True):
476
oldstate = getattr(self, u"enabled", False)
477
r = Client.disable(self)
478
if signal and oldstate != self.enabled:
479
# Emit D-Bus signal
480
self.PropertyChanged(dbus.String(u"enabled"),
481
dbus.Boolean(False, variant_level=1))
482
return r
483
484
def __del__(self, *args, **kwargs):
485
try:
486
self.remove_from_connection()
487
except LookupError:
488
pass
489
if hasattr(dbus.service.Object, u"__del__"):
490
dbus.service.Object.__del__(self, *args, **kwargs)
491
Client.__del__(self, *args, **kwargs)
492
493
def checker_callback(self, pid, condition, command,
494
*args, **kwargs):
495
self.checker_callback_tag = None
496
self.checker = None
497
# Emit D-Bus signal
498
self.PropertyChanged(dbus.String(u"checker_running"),
499
dbus.Boolean(False, variant_level=1))
500
if os.WIFEXITED(condition):
501
exitstatus = os.WEXITSTATUS(condition)
502
# Emit D-Bus signal
503
self.CheckerCompleted(dbus.Int16(exitstatus),
504
dbus.Int64(condition),
505
dbus.String(command))
506
else:
507
# Emit D-Bus signal
508
self.CheckerCompleted(dbus.Int16(-1),
509
dbus.Int64(condition),
510
dbus.String(command))
511
512
return Client.checker_callback(self, pid, condition, command,
513
*args, **kwargs)
514
515
def checked_ok(self, *args, **kwargs):
516
r = Client.checked_ok(self, *args, **kwargs)
517
# Emit D-Bus signal
518
self.PropertyChanged(
519
dbus.String(u"last_checked_ok"),
520
(_datetime_to_dbus(self.last_checked_ok,
521
variant_level=1)))
522
return r
523
524
def start_checker(self, *args, **kwargs):
525
old_checker = self.checker
526
if self.checker is not None:
527
old_checker_pid = self.checker.pid
528
else:
529
old_checker_pid = None
530
r = Client.start_checker(self, *args, **kwargs)
531
# Only if new checker process was started
532
if (self.checker is not None
533
and old_checker_pid != self.checker.pid):
534
# Emit D-Bus signal
535
self.CheckerStarted(self.current_checker_command)
536
self.PropertyChanged(
537
dbus.String(u"checker_running"),
538
dbus.Boolean(True, variant_level=1))
539
return r
540
541
def stop_checker(self, *args, **kwargs):
542
old_checker = getattr(self, u"checker", None)
543
r = Client.stop_checker(self, *args, **kwargs)
544
if (old_checker is not None
545
and getattr(self, u"checker", None) is None):
546
self.PropertyChanged(dbus.String(u"checker_running"),
547
dbus.Boolean(False, variant_level=1))
548
return r
549
550
## D-Bus methods & signals
551
_interface = u"se.bsnet.fukt.Mandos.Client"
552
553
# CheckedOK - method
554
@dbus.service.method(_interface)
555
def CheckedOK(self):
556
return self.checked_ok()
557
558
# CheckerCompleted - signal
559
@dbus.service.signal(_interface, signature=u"nxs")
560
def CheckerCompleted(self, exitcode, waitstatus, command):
561
"D-Bus signal"
562
pass
563
564
# CheckerStarted - signal
565
@dbus.service.signal(_interface, signature=u"s")
566
def CheckerStarted(self, command):
567
"D-Bus signal"
568
pass
569
570
# GetAllProperties - method
571
@dbus.service.method(_interface, out_signature=u"a{sv}")
572
def GetAllProperties(self):
573
"D-Bus method"
574
return dbus.Dictionary({
575
dbus.String(u"name"):
576
dbus.String(self.name, variant_level=1),
577
dbus.String(u"fingerprint"):
578
dbus.String(self.fingerprint, variant_level=1),
579
dbus.String(u"host"):
580
dbus.String(self.host, variant_level=1),
581
dbus.String(u"created"):
582
_datetime_to_dbus(self.created, variant_level=1),
583
dbus.String(u"last_enabled"):
584
(_datetime_to_dbus(self.last_enabled,
585
variant_level=1)
586
if self.last_enabled is not None
587
else dbus.Boolean(False, variant_level=1)),
588
dbus.String(u"enabled"):
589
dbus.Boolean(self.enabled, variant_level=1),
590
dbus.String(u"last_checked_ok"):
591
(_datetime_to_dbus(self.last_checked_ok,
592
variant_level=1)
593
if self.last_checked_ok is not None
594
else dbus.Boolean (False, variant_level=1)),
595
dbus.String(u"timeout"):
596
dbus.UInt64(self.timeout_milliseconds(),
597
variant_level=1),
598
dbus.String(u"interval"):
599
dbus.UInt64(self.interval_milliseconds(),
600
variant_level=1),
601
dbus.String(u"checker"):
602
dbus.String(self.checker_command,
603
variant_level=1),
604
dbus.String(u"checker_running"):
605
dbus.Boolean(self.checker is not None,
606
variant_level=1),
607
dbus.String(u"object_path"):
608
dbus.ObjectPath(self.dbus_object_path,
609
variant_level=1)
610
}, signature=u"sv")
611
612
# IsStillValid - method
613
@dbus.service.method(_interface, out_signature=u"b")
614
def IsStillValid(self):
615
return self.still_valid()
616
617
# PropertyChanged - signal
618
@dbus.service.signal(_interface, signature=u"sv")
619
def PropertyChanged(self, property, value):
620
"D-Bus signal"
621
pass
622
623
# ReceivedSecret - signal
624
@dbus.service.signal(_interface)
625
def ReceivedSecret(self):
626
"D-Bus signal"
627
pass
628
629
# Rejected - signal
630
@dbus.service.signal(_interface)
631
def Rejected(self):
632
"D-Bus signal"
633
pass
634
635
# SetChecker - method
636
@dbus.service.method(_interface, in_signature=u"s")
637
def SetChecker(self, checker):
638
"D-Bus setter method"
639
self.checker_command = checker
640
# Emit D-Bus signal
641
self.PropertyChanged(dbus.String(u"checker"),
642
dbus.String(self.checker_command,
643
variant_level=1))
644
645
# SetHost - method
646
@dbus.service.method(_interface, in_signature=u"s")
647
def SetHost(self, host):
648
"D-Bus setter method"
649
self.host = host
650
# Emit D-Bus signal
651
self.PropertyChanged(dbus.String(u"host"),
652
dbus.String(self.host, variant_level=1))
653
654
# SetInterval - method
655
@dbus.service.method(_interface, in_signature=u"t")
656
def SetInterval(self, milliseconds):
657
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
658
# Emit D-Bus signal
659
self.PropertyChanged(dbus.String(u"interval"),
660
(dbus.UInt64(self.interval_milliseconds(),
661
variant_level=1)))
662
663
# SetSecret - method
664
@dbus.service.method(_interface, in_signature=u"ay",
665
byte_arrays=True)
666
def SetSecret(self, secret):
667
"D-Bus setter method"
668
self.secret = str(secret)
669
670
# SetTimeout - method
671
@dbus.service.method(_interface, in_signature=u"t")
672
def SetTimeout(self, milliseconds):
673
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
674
# Emit D-Bus signal
675
self.PropertyChanged(dbus.String(u"timeout"),
676
(dbus.UInt64(self.timeout_milliseconds(),
677
variant_level=1)))
678
679
# Enable - method
680
@dbus.service.method(_interface)
681
def Enable(self):
682
"D-Bus method"
683
self.enable()
684
685
# StartChecker - method
686
@dbus.service.method(_interface)
687
def StartChecker(self):
688
"D-Bus method"
689
self.start_checker()
690
691
# Disable - method
692
@dbus.service.method(_interface)
693
def Disable(self):
694
"D-Bus method"
695
self.disable()
696
697
# StopChecker - method
698
@dbus.service.method(_interface)
699
def StopChecker(self):
700
self.stop_checker()
701
702
del _interface
703
704
705
class ClientHandler(SocketServer.BaseRequestHandler, object):
706
"""A class to handle client connections.
707
708
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.
709
441
Note: This will run in its own forked process."""
710
442
711
443
def handle(self):
712
444
logger.info(u"TCP connection from: %s",
713
unicode(self.client_address))
714
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
715
# Open IPC pipe to parent process
716
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
717
session = (gnutls.connection
718
.ClientSession(self.request,
719
gnutls.connection
720
.X509Credentials()))
721
722
line = self.request.makefile().readline()
723
logger.debug(u"Protocol version: %r", line)
724
try:
725
if int(line.strip().split()[0]) > 1:
726
raise RuntimeError
727
except (ValueError, IndexError, RuntimeError), error:
728
logger.error(u"Unknown protocol version: %s", error)
729
return
730
731
# Note: gnutls.connection.X509Credentials is really a
732
# generic GnuTLS certificate credentials object so long as
733
# no X.509 keys are added to it. Therefore, we can use it
734
# here despite using OpenPGP certificates.
735
736
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
737
# u"+AES-256-CBC", u"+SHA1",
738
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
739
# u"+DHE-DSS"))
740
# Use a fallback default, since this MUST be set.
741
priority = self.server.gnutls_priority
742
if priority is None:
743
priority = u"NORMAL"
744
(gnutls.library.functions
745
.gnutls_priority_set_direct(session._c_object,
746
priority, None))
747
748
try:
749
session.handshake()
750
except gnutls.errors.GNUTLSError, error:
751
logger.warning(u"Handshake failed: %s", error)
752
# Do not run session.bye() here: the session is not
753
# established. Just abandon the request.
754
return
755
logger.debug(u"Handshake succeeded")
756
try:
757
fpr = self.fingerprint(self.peer_certificate(session))
758
except (TypeError, gnutls.errors.GNUTLSError), error:
759
logger.warning(u"Bad certificate: %s", error)
760
session.bye()
761
return
762
logger.debug(u"Fingerprint: %s", fpr)
763
764
for c in self.server.clients:
765
if c.fingerprint == fpr:
766
client = c
767
break
768
else:
769
ipc.write(u"NOTFOUND %s\n" % fpr)
770
session.bye()
771
return
772
# Have to check if client.still_valid(), since it is
773
# possible that the client timed out while establishing
774
# the GnuTLS session.
775
if not client.still_valid():
776
ipc.write(u"INVALID %s\n" % client.name)
777
session.bye()
778
return
779
ipc.write(u"SENDING %s\n" % client.name)
780
sent_size = 0
781
while sent_size < len(client.secret):
782
sent = session.send(client.secret[sent_size:])
783
logger.debug(u"Sent: %d, remaining: %d",
784
sent, len(client.secret)
785
- (sent_size + sent))
786
sent_size += sent
787
session.bye()
788
789
@staticmethod
790
def peer_certificate(session):
791
"Return the peer's OpenPGP certificate as a bytestring"
792
# If not an OpenPGP certificate...
793
if (gnutls.library.functions
794
.gnutls_certificate_type_get(session._c_object)
795
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
796
# ...do the normal thing
797
return session.peer_certificate
798
list_size = ctypes.c_uint(1)
799
cert_list = (gnutls.library.functions
800
.gnutls_certificate_get_peers
801
(session._c_object, ctypes.byref(list_size)))
802
if not bool(cert_list) and list_size.value != 0:
803
raise gnutls.errors.GNUTLSError(u"error getting peer"
804
u" certificate")
805
if list_size.value == 0:
806
return None
807
cert = cert_list[0]
808
return ctypes.string_at(cert.data, cert.size)
809
810
@staticmethod
811
def fingerprint(openpgp):
812
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
813
# New GnuTLS "datum" with the OpenPGP public key
814
datum = (gnutls.library.types
815
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
816
ctypes.POINTER
817
(ctypes.c_ubyte)),
818
ctypes.c_uint(len(openpgp))))
819
# New empty GnuTLS certificate
820
crt = gnutls.library.types.gnutls_openpgp_crt_t()
821
(gnutls.library.functions
822
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
823
# Import the OpenPGP public key into the certificate
824
(gnutls.library.functions
825
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
826
gnutls.library.constants
827
.GNUTLS_OPENPGP_FMT_RAW))
828
# Verify the self signature in the key
829
crtverify = ctypes.c_uint()
830
(gnutls.library.functions
831
.gnutls_openpgp_crt_verify_self(crt, 0,
832
ctypes.byref(crtverify)))
833
if crtverify.value != 0:
834
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
835
raise (gnutls.errors.CertificateSecurityError
836
(u"Verify failed"))
837
# New buffer for the fingerprint
838
buf = ctypes.create_string_buffer(20)
839
buf_len = ctypes.c_size_t()
840
# Get the fingerprint from the certificate into the buffer
841
(gnutls.library.functions
842
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
843
ctypes.byref(buf_len)))
844
# Deinit the certificate
845
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
846
# Convert the buffer to a Python bytestring
847
fpr = ctypes.string_at(buf, buf_len.value)
848
# Convert the bytestring to hexadecimal notation
849
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
850
return hex_fpr
851
852
853
class ForkingMixInWithPipe(SocketServer.ForkingMixIn, object):
854
"""Like SocketServer.ForkingMixIn, but also pass a pipe.
855
856
Assumes a gobject.MainLoop event loop.
857
"""
858
def process_request(self, request, client_address):
859
"""Overrides and wraps the original process_request().
860
861
This function creates a new pipe in self.pipe
862
"""
863
self.pipe = os.pipe()
864
super(ForkingMixInWithPipe,
865
self).process_request(request, client_address)
866
os.close(self.pipe[1]) # close write end
867
# Call "handle_ipc" for both data and EOF events
868
gobject.io_add_watch(self.pipe[0],
869
gobject.IO_IN | gobject.IO_HUP,
870
self.handle_ipc)
871
def handle_ipc(source, condition):
872
"""Dummy function; override as necessary"""
873
os.close(source)
874
return False
875
876
877
class IPv6_TCPServer(ForkingMixInWithPipe,
878
SocketServer.TCPServer, object):
879
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
880
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.
881
517
Attributes:
882
enabled: Boolean; whether this server is activated yet
883
interface: None or a network interface name (string)
884
use_ipv6: Boolean; to use IPv6 or not
885
----
518
settings: Server settings
886
519
clients: Set() of Client objects
887
gnutls_priority GnuTLS priority string
888
use_dbus: Boolean; to emit D-Bus signals or not
889
520
"""
890
def __init__(self, server_address, RequestHandlerClass,
891
interface=None, use_ipv6=True, clients=None,
892
gnutls_priority=None, use_dbus=True):
893
self.enabled = False
894
self.interface = interface
895
if use_ipv6:
896
self.address_family = socket.AF_INET6
897
self.clients = clients
898
self.use_dbus = use_dbus
899
self.gnutls_priority = gnutls_priority
900
SocketServer.TCPServer.__init__(self, server_address,
901
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)
902
530
def server_bind(self):
903
531
"""This overrides the normal server_bind() function
904
532
to bind to an interface if one was specified, and also NOT to
905
533
bind to an address or port if they were not specified."""
906
if self.interface is not None:
534
if self.settings["interface"]:
535
# 25 is from /usr/include/asm-i486/socket.h
536
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
907
537
try:
908
538
self.socket.setsockopt(socket.SOL_SOCKET,
909
539
SO_BINDTODEVICE,
910
str(self.interface + u'\0'))
540
self.settings["interface"])
911
541
except socket.error, error:
912
542
if error[0] == errno.EPERM:
913
543
logger.error(u"No permission to"
914
544
u" bind to interface %s",
915
self.interface)
545
self.settings["interface"])
916
546
else:
917
raise
547
raise error
918
548
# Only bind(2) the socket if we really need to.
919
549
if self.server_address[0] or self.server_address[1]:
920
550
if not self.server_address[0]:
921
if self.address_family == socket.AF_INET6:
922
any_address = u"::" # in6addr_any
923
else:
924
any_address = socket.INADDR_ANY
925
self.server_address = (any_address,
551
in6addr_any = "::"
552
self.server_address = (in6addr_any,
926
553
self.server_address[1])
927
554
elif not self.server_address[1]:
928
555
self.server_address = (self.server_address[0],
929
556
0)
930
# if self.interface:
557
# if self.settings["interface"]:
931
558
# self.server_address = (self.server_address[0],
932
559
# 0, # port
933
560
# 0, # flowinfo
934
561
# if_nametoindex
935
# (self.interface))
936
return SocketServer.TCPServer.server_bind(self)
937
def server_activate(self):
938
if self.enabled:
939
return SocketServer.TCPServer.server_activate(self)
940
def enable(self):
941
self.enabled = True
942
def handle_ipc(self, source, condition, file_objects={}):
943
condition_names = {
944
gobject.IO_IN: u"IN", # There is data to read.
945
gobject.IO_OUT: u"OUT", # Data can be written (without
946
# blocking).
947
gobject.IO_PRI: u"PRI", # There is urgent data to read.
948
gobject.IO_ERR: u"ERR", # Error condition.
949
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
950
# broken, usually for pipes and
951
# sockets).
952
}
953
conditions_string = ' | '.join(name
954
for cond, name in
955
condition_names.iteritems()
956
if cond & condition)
957
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
958
conditions_string)
959
960
# Turn the pipe file descriptor into a Python file object
961
if source not in file_objects:
962
file_objects[source] = os.fdopen(source, u"r", 1)
963
964
# Read a line from the file object
965
cmdline = file_objects[source].readline()
966
if not cmdline: # Empty line means end of file
967
# close the IPC pipe
968
file_objects[source].close()
969
del file_objects[source]
970
971
# Stop calling this function
972
return False
973
974
logger.debug(u"IPC command: %r", cmdline)
975
976
# Parse and act on command
977
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
978
979
if cmd == u"NOTFOUND":
980
logger.warning(u"Client not found for fingerprint: %s",
981
args)
982
if self.use_dbus:
983
# Emit D-Bus signal
984
mandos_dbus_service.ClientNotFound(args)
985
elif cmd == u"INVALID":
986
for client in self.clients:
987
if client.name == args:
988
logger.warning(u"Client %s is invalid", args)
989
if self.use_dbus:
990
# Emit D-Bus signal
991
client.Rejected()
992
break
993
else:
994
logger.error(u"Unknown client %s is invalid", args)
995
elif cmd == u"SENDING":
996
for client in self.clients:
997
if client.name == args:
998
logger.info(u"Sending secret to %s", client.name)
999
client.checked_ok()
1000
if self.use_dbus:
1001
# Emit D-Bus signal
1002
client.ReceivedSecret()
1003
break
1004
else:
1005
logger.error(u"Sending secret to unknown client %s",
1006
args)
1007
else:
1008
logger.error(u"Unknown IPC command: %r", cmdline)
1009
1010
# Keep calling this function
1011
return True
562
# (self.settings
563
# ["interface"]))
564
return super(type(self), self).server_bind()
1012
565
1013
566
1014
567
def string_to_delta(interval):
1015
568
"""Parse a string and return a datetime.timedelta
1016
1017
>>> string_to_delta(u'7d')
569
570
>>> string_to_delta('7d')
1018
571
datetime.timedelta(7)
1019
>>> string_to_delta(u'60s')
572
>>> string_to_delta('60s')
1020
573
datetime.timedelta(0, 60)
1021
>>> string_to_delta(u'60m')
574
>>> string_to_delta('60m')
1022
575
datetime.timedelta(0, 3600)
1023
>>> string_to_delta(u'24h')
576
>>> string_to_delta('24h')
1024
577
datetime.timedelta(1)
1025
578
>>> string_to_delta(u'1w')
1026
579
datetime.timedelta(7)
1027
>>> string_to_delta(u'5m 30s')
580
>>> string_to_delta('5m 30s')
1028
581
datetime.timedelta(0, 330)
1029
582
"""
1030
583
timevalue = datetime.timedelta(0)
1031
584
for s in interval.split():
1032
585
try:
1033
suffix = unicode(s[-1])
1034
value = int(s[:-1])
586
suffix=unicode(s[-1])
587
value=int(s[:-1])
1035
588
if suffix == u"d":
1036
589
delta = datetime.timedelta(value)
1037
590
elif suffix == u"s":
1071
624
elif state == avahi.ENTRY_GROUP_FAILURE:
1072
625
logger.critical(u"Avahi: Error in group state changed %s",
1073
626
unicode(error))
1074
raise AvahiGroupError(u"State changed: %s" % unicode(error))
627
raise AvahiGroupError("State changed: %s", str(error))
1075
628
1076
629
def if_nametoindex(interface):
1077
"""Call the C function if_nametoindex(), or equivalent
1078
1079
Note: This function cannot accept a unicode string."""
630
"""Call the C function if_nametoindex(), or equivalent"""
1080
631
global if_nametoindex
1081
632
try:
1082
if_nametoindex = (ctypes.cdll.LoadLibrary
1083
(ctypes.util.find_library(u"c"))
1084
.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
1085
637
except (OSError, AttributeError):
1086
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
1087
642
def if_nametoindex(interface):
1088
643
"Get an interface index the hard way, i.e. using fcntl()"
1089
644
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1090
with closing(socket.socket()) as s:
1091
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1092
struct.pack(str(u"16s16x"),
1093
interface))
1094
interface_index = struct.unpack(str(u"I"),
1095
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]
1096
650
return interface_index
1097
651
return if_nametoindex(interface)
1098
652
1099
653
1100
654
def daemon(nochdir = False, noclose = False):
1101
655
"""See daemon(3). Standard BSD Unix function.
1102
1103
656
This should really exist as os.daemon, but it doesn't (yet)."""
1104
657
if os.fork():
1105
658
sys.exit()
1106
659
os.setsid()
1107
660
if not nochdir:
1108
os.chdir(u"/")
661
os.chdir("/")
1109
662
if os.fork():
1110
663
sys.exit()
1111
664
if not noclose:
1113
666
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1114
667
if not stat.S_ISCHR(os.fstat(null).st_mode):
1115
668
raise OSError(errno.ENODEV,
1116
u"/dev/null not a character device")
669
"/dev/null not a character device")
1117
670
os.dup2(null, sys.stdin.fileno())
1118
671
os.dup2(null, sys.stdout.fileno())
1119
672
os.dup2(null, sys.stderr.fileno())
1122
675
1123
676
1124
677
def main():
1125
1126
######################################################################
1127
# Parsing of options, both command line and config file
1128
1129
parser = optparse.OptionParser(version = "%%prog %s" % version)
1130
parser.add_option("-i", u"--interface", type=u"string",
1131
metavar="IF", help=u"Bind to interface IF")
1132
parser.add_option("-a", u"--address", type=u"string",
1133
help=u"Address to listen for requests on")
1134
parser.add_option("-p", u"--port", type=u"int",
1135
help=u"Port number to receive requests on")
1136
parser.add_option("--check", action=u"store_true",
1137
help=u"Run self-test")
1138
parser.add_option("--debug", action=u"store_true",
1139
help=u"Debug mode; run in foreground and log to"
1140
u" terminal")
1141
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1142
u" priority string (see GnuTLS documentation)")
1143
parser.add_option("--servicename", type=u"string",
1144
metavar=u"NAME", help=u"Zeroconf service name")
1145
parser.add_option("--configdir", type=u"string",
1146
default=u"/etc/mandos", metavar=u"DIR",
1147
help=u"Directory to search for configuration"
1148
u" files")
1149
parser.add_option("--no-dbus", action=u"store_false",
1150
dest=u"use_dbus", help=u"Do not provide D-Bus"
1151
u" system bus interface")
1152
parser.add_option("--no-ipv6", action=u"store_false",
1153
dest=u"use_ipv6", help=u"Do not use IPv6")
1154
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()
1155
702
1156
703
if options.check:
1157
704
import doctest
1159
706
sys.exit()
1160
707
1161
708
# Default values for config file for server-global settings
1162
server_defaults = { u"interface": u"",
1163
u"address": u"",
1164
u"port": u"",
1165
u"debug": u"False",
1166
u"priority":
1167
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1168
u"servicename": u"Mandos",
1169
u"use_dbus": u"True",
1170
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",
1171
716
}
1172
717
1173
718
# Parse config file for server-global settings
1174
719
server_config = ConfigParser.SafeConfigParser(server_defaults)
1175
720
del server_defaults
1176
server_config.read(os.path.join(options.configdir,
1177
u"mandos.conf"))
721
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1178
722
# Convert the SafeConfigParser object to a dict
1179
723
server_settings = server_config.defaults()
1180
# Use the appropriate methods on the non-string config options
1181
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1182
server_settings[option] = server_config.getboolean(u"DEFAULT",
1183
option)
1184
if server_settings["port"]:
1185
server_settings["port"] = server_config.getint(u"DEFAULT",
1186
u"port")
724
# Use getboolean on the boolean config option
725
server_settings["debug"] = server_config.getboolean\
726
("DEFAULT", "debug")
1187
727
del server_config
1188
728
1189
729
# Override the settings from the config file with command line
1190
730
# options, if set.
1191
for option in (u"interface", u"address", u"port", u"debug",
1192
u"priority", u"servicename", u"configdir",
1193
u"use_dbus", u"use_ipv6"):
731
for option in ("interface", "address", "port", "debug",
732
"priority", "servicename", "configdir"):
1194
733
value = getattr(options, option)
1195
734
if value is not None:
1196
735
server_settings[option] = value
1197
736
del options
1198
# Force all strings to be unicode
1199
for option in server_settings.keys():
1200
if type(server_settings[option]) is str:
1201
server_settings[option] = unicode(server_settings[option])
1202
737
# Now we have our good server settings in "server_settings"
1203
738
1204
##################################################################
1205
1206
# For convenience
1207
debug = server_settings[u"debug"]
1208
use_dbus = server_settings[u"use_dbus"]
1209
use_ipv6 = server_settings[u"use_ipv6"]
739
debug = server_settings["debug"]
1210
740
1211
741
if not debug:
1212
742
syslogger.setLevel(logging.WARNING)
1213
743
console.setLevel(logging.WARNING)
1214
744
1215
if server_settings[u"servicename"] != u"Mandos":
1216
syslogger.setFormatter(logging.Formatter
1217
(u'Mandos (%s) [%%(process)d]:'
1218
u' %%(levelname)s: %%(message)s'
1219
% 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"]))
1220
750
1221
751
# Parse config file with clients
1222
client_defaults = { u"timeout": u"1h",
1223
u"interval": u"5m",
1224
u"checker": u"fping -q -- %%(host)s",
1225
u"host": u"",
752
client_defaults = { "timeout": "1h",
753
"interval": "5m",
754
"checker": "fping -q -- %(host)s",
755
"host": "",
1226
756
}
1227
757
client_config = ConfigParser.SafeConfigParser(client_defaults)
1228
client_config.read(os.path.join(server_settings[u"configdir"],
1229
u"clients.conf"))
1230
1231
global mandos_dbus_service
1232
mandos_dbus_service = None
1233
1234
clients = Set()
1235
tcp_server = IPv6_TCPServer((server_settings[u"address"],
1236
server_settings[u"port"]),
1237
ClientHandler,
1238
interface=
1239
server_settings[u"interface"],
1240
use_ipv6=use_ipv6,
1241
clients=clients,
1242
gnutls_priority=
1243
server_settings[u"priority"],
1244
use_dbus=use_dbus)
1245
pidfilename = u"/var/run/mandos.pid"
1246
try:
1247
pidfile = open(pidfilename, u"w")
1248
except IOError:
1249
logger.error(u"Could not open file %r", pidfilename)
1250
1251
try:
1252
uid = pwd.getpwnam(u"_mandos").pw_uid
1253
gid = pwd.getpwnam(u"_mandos").pw_gid
1254
except KeyError:
1255
try:
1256
uid = pwd.getpwnam(u"mandos").pw_uid
1257
gid = pwd.getpwnam(u"mandos").pw_gid
1258
except KeyError:
1259
try:
1260
uid = pwd.getpwnam(u"nobody").pw_uid
1261
gid = pwd.getpwnam(u"nobody").pw_gid
1262
except KeyError:
1263
uid = 65534
1264
gid = 65534
1265
try:
1266
os.setgid(gid)
1267
os.setuid(uid)
1268
except OSError, error:
1269
if error[0] != errno.EPERM:
1270
raise error
1271
1272
# Enable all possible GnuTLS debugging
1273
if debug:
1274
# "Use a log level over 10 to enable all debugging options."
1275
# - GnuTLS manual
1276
gnutls.library.functions.gnutls_global_set_log_level(11)
1277
1278
@gnutls.library.types.gnutls_log_func
1279
def debug_gnutls(level, string):
1280
logger.debug(u"GnuTLS: %s", string[:-1])
1281
1282
(gnutls.library.functions
1283
.gnutls_global_set_log_function(debug_gnutls))
758
client_config.read(os.path.join(server_settings["configdir"],
759
"clients.conf"))
1284
760
1285
761
global service
1286
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1287
service = AvahiService(name = server_settings[u"servicename"],
1288
servicetype = u"_mandos._tcp",
1289
protocol = protocol)
762
service = AvahiService(name = server_settings["servicename"],
763
type = "_mandos._tcp", );
1290
764
if server_settings["interface"]:
1291
service.interface = (if_nametoindex
1292
(str(server_settings[u"interface"])))
765
service.interface = if_nametoindex\
766
(server_settings["interface"])
1293
767
1294
768
global main_loop
1295
769
global bus
1302
776
avahi.DBUS_PATH_SERVER),
1303
777
avahi.DBUS_INTERFACE_SERVER)
1304
778
# End of Avahi example code
1305
if use_dbus:
1306
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1307
1308
client_class = Client
1309
if use_dbus:
1310
client_class = ClientDBus
1311
clients.update(Set(
1312
client_class(name = section,
1313
config= dict(client_config.items(section)))
1314
for section in client_config.sections()))
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()))
1315
792
if not clients:
1316
logger.warning(u"No clients defined")
793
logger.critical(u"No clients defined")
794
sys.exit(1)
1317
795
1318
796
if debug:
1319
797
# Redirect stdin so all checkers get /dev/null
1327
805
# Close all input and output, do double fork, etc.
1328
806
daemon()
1329
807
808
pidfilename = "/var/run/mandos/mandos.pid"
809
pid = os.getpid()
1330
810
try:
1331
with closing(pidfile):
1332
pid = os.getpid()
1333
pidfile.write(str(pid) + "\n")
811
pidfile = open(pidfilename, "w")
812
pidfile.write(str(pid) + "\n")
813
pidfile.close()
1334
814
del pidfile
1335
except IOError:
1336
logger.error(u"Could not write to file %r with PID %d",
1337
pidfilename, pid)
1338
except NameError:
1339
# "pidfile" was never created
1340
pass
1341
del pidfilename
815
except IOError, err:
816
logger.error(u"Could not write %s file with PID %d",
817
pidfilename, os.getpid())
1342
818
1343
819
def cleanup():
1344
820
"Cleanup function; run on exit"
1351
827
1352
828
while clients:
1353
829
client = clients.pop()
1354
client.disable_hook = None
1355
client.disable()
830
client.stop_hook = None
831
client.stop()
1356
832
1357
833
atexit.register(cleanup)
1358
834
1361
837
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1362
838
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1363
839
1364
if use_dbus:
1365
class MandosDBusService(dbus.service.Object):
1366
"""A D-Bus proxy object"""
1367
def __init__(self):
1368
dbus.service.Object.__init__(self, bus, u"/")
1369
_interface = u"se.bsnet.fukt.Mandos"
1370
1371
@dbus.service.signal(_interface, signature=u"oa{sv}")
1372
def ClientAdded(self, objpath, properties):
1373
"D-Bus signal"
1374
pass
1375
1376
@dbus.service.signal(_interface, signature=u"s")
1377
def ClientNotFound(self, fingerprint):
1378
"D-Bus signal"
1379
pass
1380
1381
@dbus.service.signal(_interface, signature=u"os")
1382
def ClientRemoved(self, objpath, name):
1383
"D-Bus signal"
1384
pass
1385
1386
@dbus.service.method(_interface, out_signature=u"ao")
1387
def GetAllClients(self):
1388
"D-Bus method"
1389
return dbus.Array(c.dbus_object_path for c in clients)
1390
1391
@dbus.service.method(_interface,
1392
out_signature=u"a{oa{sv}}")
1393
def GetAllClientsWithProperties(self):
1394
"D-Bus method"
1395
return dbus.Dictionary(
1396
((c.dbus_object_path, c.GetAllProperties())
1397
for c in clients),
1398
signature=u"oa{sv}")
1399
1400
@dbus.service.method(_interface, in_signature=u"o")
1401
def RemoveClient(self, object_path):
1402
"D-Bus method"
1403
for c in clients:
1404
if c.dbus_object_path == object_path:
1405
clients.remove(c)
1406
c.remove_from_connection()
1407
# Don't signal anything except ClientRemoved
1408
c.disable(signal=False)
1409
# Emit D-Bus signal
1410
self.ClientRemoved(object_path, c.name)
1411
return
1412
raise KeyError
1413
1414
del _interface
1415
1416
mandos_dbus_service = MandosDBusService()
1417
1418
840
for client in clients:
1419
if use_dbus:
1420
# Emit D-Bus signal
1421
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1422
client.GetAllProperties())
1423
client.enable()
1424
1425
tcp_server.enable()
1426
tcp_server.server_activate()
1427
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)
1428
848
# Find out what port we got
1429
849
service.port = tcp_server.socket.getsockname()[1]
1430
if use_ipv6:
1431
logger.info(u"Now listening on address %r, port %d,"
1432
" flowinfo %d, scope_id %d"
1433
% tcp_server.socket.getsockname())
1434
else: # IPv4
1435
logger.info(u"Now listening on address %r, port %d"
1436
% 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())
1437
852
1438
853
#service.interface = tcp_server.socket.getsockname()[3]
1439
854
1440
855
try:
1441
856
# From the Avahi example code
1442
server.connect_to_signal(u"StateChanged", server_state_changed)
857
server.connect_to_signal("StateChanged", server_state_changed)
1443
858
try:
1444
859
server_state_changed(server.GetState())
1445
860
except dbus.exceptions.DBusException, error:
1449
864
1450
865
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1451
866
lambda *args, **kwargs:
1452
(tcp_server.handle_request
1453
(*args[2:], **kwargs) or True))
867
tcp_server.handle_request\
868
(*args[2:], **kwargs) or True)
1454
869
1455
870
logger.debug(u"Starting main loop")
871
main_loop_started = True
1456
872
main_loop.run()
1457
873
except AvahiError, error:
1458
logger.critical(u"AvahiError: %s", error)
874
logger.critical(u"AvahiError: %s" + unicode(error))
1459
875
sys.exit(1)
1460
876
except KeyboardInterrupt:
1461
877
if debug:
1462
print >> sys.stderr
1463
logger.debug(u"Server received KeyboardInterrupt")
1464
logger.debug(u"Server exiting")
878
print
1465
879
1466
880
if __name__ == '__main__':
1467
881
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0