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- Committer: Teddy Hogeborn
- Date: 2008-08-18 05:57:11 UTC
- Revision ID: teddy@fukt.bsnet.se-20080818055711-2rpzat3hkbq3us62
No code or documentation changes.
- 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:
- Makefile
added
removed
mandos
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# and some lines in "main".
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#
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# 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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# it under the terms of the GNU General Public License as published by
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# GNU General Public License for more details.
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25
#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# Contact the authors at <mandos@fukt.bsnet.se>.
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#
33
31
34
from __future__ import division, with_statement, absolute_import
32
from __future__ import division
35
33
36
34
import SocketServer
37
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import socket
38
import optparse
36
import select
37
from optparse import OptionParser
39
38
import datetime
40
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import errno
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40
import gnutls.crypto
55
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import stat
56
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import logging
57
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import logging.handlers
58
import pwd
59
from contextlib import closing
60
57
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import dbus
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import dbus.service
63
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import gobject
64
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import avahi
65
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from dbus.mainloop.glib import DBusGMainLoop
66
62
import ctypes
67
import ctypes.util
68
69
try:
70
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
71
except AttributeError:
72
try:
73
from IN import SO_BINDTODEVICE
74
except ImportError:
75
# From /usr/include/asm/socket.h
76
SO_BINDTODEVICE = 25
77
78
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version = "1.0.8"
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64
version = "1.0"
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65
81
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logger = logging.Logger('mandos')
82
syslogger = (logging.handlers.SysLogHandler
83
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
84
address = "/dev/log"))
85
syslogger.setFormatter(logging.Formatter
86
('Mandos [%(process)d]: %(levelname)s:'
87
' %(message)s'))
67
syslogger = logging.handlers.SysLogHandler\
68
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
69
address = "/dev/log")
70
syslogger.setFormatter(logging.Formatter\
71
('Mandos: %(levelname)s: %(message)s'))
88
72
logger.addHandler(syslogger)
89
73
90
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console = logging.StreamHandler()
91
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
92
' %(levelname)s: %(message)s'))
75
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
76
' %(message)s'))
93
77
logger.addHandler(console)
94
78
95
79
class AvahiError(Exception):
96
def __init__(self, value, *args, **kwargs):
80
def __init__(self, value):
97
81
self.value = value
98
super(AvahiError, self).__init__(value, *args, **kwargs)
99
def __unicode__(self):
100
return unicode(repr(self.value))
82
def __str__(self):
83
return repr(self.value)
101
84
102
85
class AvahiServiceError(AvahiError):
103
86
pass
108
91
109
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class AvahiService(object):
110
93
"""An Avahi (Zeroconf) service.
111
112
94
Attributes:
113
95
interface: integer; avahi.IF_UNSPEC or an interface index.
114
96
Used to optionally bind to the specified interface.
124
106
a sensible number of times
125
107
"""
126
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def __init__(self, interface = avahi.IF_UNSPEC, name = None,
127
servicetype = None, port = None, TXT = None,
128
domain = "", host = "", max_renames = 32768,
129
protocol = avahi.PROTO_UNSPEC):
109
type = None, port = None, TXT = None, domain = "",
110
host = "", max_renames = 32768):
130
111
self.interface = interface
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112
self.name = name
132
self.type = servicetype
113
self.type = type
133
114
self.port = port
134
self.TXT = TXT if TXT is not None else []
115
if TXT is None:
116
self.TXT = []
117
else:
118
self.TXT = TXT
135
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self.domain = domain
136
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self.host = host
137
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self.rename_count = 0
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self.max_renames = max_renames
139
self.protocol = protocol
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123
def rename(self):
141
124
"""Derived from the Avahi example code"""
142
125
if self.rename_count >= self.max_renames:
143
logger.critical(u"No suitable Zeroconf service name found"
144
u" after %i retries, exiting.",
145
self.rename_count)
146
raise AvahiServiceError(u"Too many renames")
126
logger.critical(u"No suitable service name found after %i"
127
u" retries, exiting.", rename_count)
128
raise AvahiServiceError("Too many renames")
147
129
self.name = server.GetAlternativeServiceName(self.name)
148
logger.info(u"Changing Zeroconf service name to %r ...",
149
str(self.name))
150
syslogger.setFormatter(logging.Formatter
151
('Mandos (%s) [%%(process)d]:'
152
' %%(levelname)s: %%(message)s'
153
% self.name))
130
logger.info(u"Changing name to %r ...", str(self.name))
131
syslogger.setFormatter(logging.Formatter\
132
('Mandos (%s): %%(levelname)s:'
133
' %%(message)s' % self.name))
154
134
self.remove()
155
135
self.add()
156
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self.rename_count += 1
162
142
"""Derived from the Avahi example code"""
163
143
global group
164
144
if group is None:
165
group = dbus.Interface(bus.get_object
166
(avahi.DBUS_NAME,
145
group = dbus.Interface\
146
(bus.get_object(avahi.DBUS_NAME,
167
147
server.EntryGroupNew()),
168
avahi.DBUS_INTERFACE_ENTRY_GROUP)
148
avahi.DBUS_INTERFACE_ENTRY_GROUP)
169
149
group.connect_to_signal('StateChanged',
170
150
entry_group_state_changed)
171
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
151
logger.debug(u"Adding service '%s' of type '%s' ...",
172
152
service.name, service.type)
173
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group.AddService(
174
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self.interface, # interface
175
self.protocol, # protocol
155
avahi.PROTO_INET6, # protocol
176
156
dbus.UInt32(0), # flags
177
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self.name, self.type,
178
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self.domain, self.host,
185
165
# End of Avahi example code
186
166
187
167
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def _datetime_to_dbus(dt, variant_level=0):
189
"""Convert a UTC datetime.datetime() to a D-Bus type."""
190
return dbus.String(dt.isoformat(), variant_level=variant_level)
191
192
193
168
class Client(object):
194
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"""A representation of a client host served by this server.
195
196
170
Attributes:
197
name: string; from the config file, used in log messages and
198
D-Bus identifiers
171
name: string; from the config file, used in log messages
199
172
fingerprint: string (40 or 32 hexadecimal digits); used to
200
173
uniquely identify the client
201
secret: bytestring; sent verbatim (over TLS) to client
202
host: string; available for use by the checker command
203
created: datetime.datetime(); (UTC) object creation
204
last_enabled: datetime.datetime(); (UTC)
205
enabled: bool()
206
last_checked_ok: datetime.datetime(); (UTC) or None
207
timeout: datetime.timedelta(); How long from last_checked_ok
208
until this client is invalid
209
interval: datetime.timedelta(); How often to start a new checker
210
disable_hook: If set, called by disable() as disable_hook(self)
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checker: subprocess.Popen(); a running checker process used
212
to see if the client lives.
213
'None' if no process is running.
174
secret: bytestring; sent verbatim (over TLS) to client
175
host: string; available for use by the checker command
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created: datetime.datetime(); object creation, not client host
177
last_checked_ok: datetime.datetime() or None if not yet checked OK
178
timeout: datetime.timedelta(); How long from last_checked_ok
179
until this client is invalid
180
interval: datetime.timedelta(); How often to start a new checker
181
stop_hook: If set, called by stop() as stop_hook(self)
182
checker: subprocess.Popen(); a running checker process used
183
to see if the client lives.
184
'None' if no process is running.
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checker_initiator_tag: a gobject event source tag, or None
215
disable_initiator_tag: - '' -
186
stop_initiator_tag: - '' -
216
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checker_callback_tag: - '' -
217
188
checker_command: string; External command which is run to check if
218
189
client lives. %() expansions are done at
219
190
runtime with vars(self) as dict, so that for
220
191
instance %(name)s can be used in the command.
221
current_checker_command: string; current running checker_command
192
Private attibutes:
193
_timeout: Real variable for 'timeout'
194
_interval: Real variable for 'interval'
195
_timeout_milliseconds: Used when calling gobject.timeout_add()
196
_interval_milliseconds: - '' -
222
197
"""
223
def timeout_milliseconds(self):
224
"Return the 'timeout' attribute in milliseconds"
225
return ((self.timeout.days * 24 * 60 * 60 * 1000)
226
+ (self.timeout.seconds * 1000)
227
+ (self.timeout.microseconds // 1000))
228
229
def interval_milliseconds(self):
230
"Return the 'interval' attribute in milliseconds"
231
return ((self.interval.days * 24 * 60 * 60 * 1000)
232
+ (self.interval.seconds * 1000)
233
+ (self.interval.microseconds // 1000))
234
235
def __init__(self, name = None, disable_hook=None, config=None):
198
def _set_timeout(self, timeout):
199
"Setter function for 'timeout' attribute"
200
self._timeout = timeout
201
self._timeout_milliseconds = ((self.timeout.days
202
* 24 * 60 * 60 * 1000)
203
+ (self.timeout.seconds * 1000)
204
+ (self.timeout.microseconds
205
// 1000))
206
timeout = property(lambda self: self._timeout,
207
_set_timeout)
208
del _set_timeout
209
def _set_interval(self, interval):
210
"Setter function for 'interval' attribute"
211
self._interval = interval
212
self._interval_milliseconds = ((self.interval.days
213
* 24 * 60 * 60 * 1000)
214
+ (self.interval.seconds
215
* 1000)
216
+ (self.interval.microseconds
217
// 1000))
218
interval = property(lambda self: self._interval,
219
_set_interval)
220
del _set_interval
221
def __init__(self, name = None, stop_hook=None, config={}):
236
222
"""Note: the 'checker' key in 'config' sets the
237
223
'checker_command' attribute and *not* the 'checker'
238
224
attribute."""
239
225
self.name = name
240
if config is None:
241
config = {}
242
226
logger.debug(u"Creating client %r", self.name)
243
227
# Uppercase and remove spaces from fingerprint for later
244
228
# comparison purposes with return value from the fingerprint()
245
229
# function
246
self.fingerprint = (config["fingerprint"].upper()
247
.replace(u" ", u""))
230
self.fingerprint = config["fingerprint"].upper()\
231
.replace(u" ", u"")
248
232
logger.debug(u" Fingerprint: %s", self.fingerprint)
249
233
if "secret" in config:
250
234
self.secret = config["secret"].decode(u"base64")
251
235
elif "secfile" in config:
252
with closing(open(os.path.expanduser
253
(os.path.expandvars
254
(config["secfile"])))) as secfile:
255
self.secret = secfile.read()
236
sf = open(config["secfile"])
237
self.secret = sf.read()
238
sf.close()
256
239
else:
257
240
raise TypeError(u"No secret or secfile for client %s"
258
241
% self.name)
259
242
self.host = config.get("host", "")
260
self.created = datetime.datetime.utcnow()
261
self.enabled = False
262
self.last_enabled = None
243
self.created = datetime.datetime.now()
263
244
self.last_checked_ok = None
264
245
self.timeout = string_to_delta(config["timeout"])
265
246
self.interval = string_to_delta(config["interval"])
266
self.disable_hook = disable_hook
247
self.stop_hook = stop_hook
267
248
self.checker = None
268
249
self.checker_initiator_tag = None
269
self.disable_initiator_tag = None
250
self.stop_initiator_tag = None
270
251
self.checker_callback_tag = None
271
self.checker_command = config["checker"]
272
self.current_checker_command = None
273
self.last_connect = None
274
275
def enable(self):
252
self.check_command = config["checker"]
253
def start(self):
276
254
"""Start this client's checker and timeout hooks"""
277
self.last_enabled = datetime.datetime.utcnow()
278
255
# Schedule a new checker to be started an 'interval' from now,
279
256
# and every interval from then on.
280
self.checker_initiator_tag = (gobject.timeout_add
281
(self.interval_milliseconds(),
282
self.start_checker))
257
self.checker_initiator_tag = gobject.timeout_add\
258
(self._interval_milliseconds,
259
self.start_checker)
283
260
# Also start a new checker *right now*.
284
261
self.start_checker()
285
# Schedule a disable() when 'timeout' has passed
286
self.disable_initiator_tag = (gobject.timeout_add
287
(self.timeout_milliseconds(),
288
self.disable))
289
self.enabled = True
290
291
def disable(self):
292
"""Disable this client."""
293
if not getattr(self, "enabled", False):
262
# Schedule a stop() when 'timeout' has passed
263
self.stop_initiator_tag = gobject.timeout_add\
264
(self._timeout_milliseconds,
265
self.stop)
266
def stop(self):
267
"""Stop this client.
268
The possibility that a client might be restarted is left open,
269
but not currently used."""
270
# If this client doesn't have a secret, it is already stopped.
271
if hasattr(self, "secret") and self.secret:
272
logger.info(u"Stopping client %s", self.name)
273
self.secret = None
274
else:
294
275
return False
295
logger.info(u"Disabling client %s", self.name)
296
if getattr(self, "disable_initiator_tag", False):
297
gobject.source_remove(self.disable_initiator_tag)
298
self.disable_initiator_tag = None
276
if getattr(self, "stop_initiator_tag", False):
277
gobject.source_remove(self.stop_initiator_tag)
278
self.stop_initiator_tag = None
299
279
if getattr(self, "checker_initiator_tag", False):
300
280
gobject.source_remove(self.checker_initiator_tag)
301
281
self.checker_initiator_tag = None
302
282
self.stop_checker()
303
if self.disable_hook:
304
self.disable_hook(self)
305
self.enabled = False
283
if self.stop_hook:
284
self.stop_hook(self)
306
285
# Do not run this again if called by a gobject.timeout_add
307
286
return False
308
309
287
def __del__(self):
310
self.disable_hook = None
311
self.disable()
312
313
def checker_callback(self, pid, condition, command):
288
self.stop_hook = None
289
self.stop()
290
def checker_callback(self, pid, condition):
314
291
"""The checker has completed, so take appropriate actions."""
292
now = datetime.datetime.now()
315
293
self.checker_callback_tag = None
316
294
self.checker = None
317
if os.WIFEXITED(condition):
318
exitstatus = os.WEXITSTATUS(condition)
319
if exitstatus == 0:
320
logger.info(u"Checker for %(name)s succeeded",
321
vars(self))
322
self.checked_ok()
323
else:
324
logger.info(u"Checker for %(name)s failed",
325
vars(self))
326
else:
295
if os.WIFEXITED(condition) \
296
and (os.WEXITSTATUS(condition) == 0):
297
logger.info(u"Checker for %(name)s succeeded",
298
vars(self))
299
self.last_checked_ok = now
300
gobject.source_remove(self.stop_initiator_tag)
301
self.stop_initiator_tag = gobject.timeout_add\
302
(self._timeout_milliseconds,
303
self.stop)
304
elif not os.WIFEXITED(condition):
327
305
logger.warning(u"Checker for %(name)s crashed?",
328
306
vars(self))
329
330
def checked_ok(self):
331
"""Bump up the timeout for this client.
332
333
This should only be called when the client has been seen,
334
alive and well.
335
"""
336
self.last_checked_ok = datetime.datetime.utcnow()
337
gobject.source_remove(self.disable_initiator_tag)
338
self.disable_initiator_tag = (gobject.timeout_add
339
(self.timeout_milliseconds(),
340
self.disable))
341
307
else:
308
logger.info(u"Checker for %(name)s failed",
309
vars(self))
342
310
def start_checker(self):
343
311
"""Start a new checker subprocess if one is not running.
344
345
312
If a checker already exists, leave it running and do
346
313
nothing."""
347
314
# The reason for not killing a running checker is that if we
352
319
# checkers alone, the checker would have to take more time
353
320
# than 'timeout' for the client to be declared invalid, which
354
321
# is as it should be.
355
356
# If a checker exists, make sure it is not a zombie
357
if self.checker is not None:
358
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
359
if pid:
360
logger.warning("Checker was a zombie")
361
gobject.source_remove(self.checker_callback_tag)
362
self.checker_callback(pid, status,
363
self.current_checker_command)
364
# Start a new checker if needed
365
322
if self.checker is None:
366
323
try:
367
# In case checker_command has exactly one % operator
368
command = self.checker_command % self.host
324
# In case check_command has exactly one % operator
325
command = self.check_command % self.host
369
326
except TypeError:
370
327
# Escape attributes for the shell
371
328
escaped_attrs = dict((key, re.escape(str(val)))
372
329
for key, val in
373
330
vars(self).iteritems())
374
331
try:
375
command = self.checker_command % escaped_attrs
332
command = self.check_command % escaped_attrs
376
333
except TypeError, error:
377
334
logger.error(u'Could not format string "%s":'
378
u' %s', self.checker_command, error)
335
u' %s', self.check_command, error)
379
336
return True # Try again later
380
self.current_checker_command = command
381
337
try:
382
338
logger.info(u"Starting checker %r for %s",
383
339
command, self.name)
384
# We don't need to redirect stdout and stderr, since
385
# in normal mode, that is already done by daemon(),
386
# and in debug mode we don't want to. (Stdin is
387
# always replaced by /dev/null.)
388
340
self.checker = subprocess.Popen(command,
389
341
close_fds=True,
390
342
shell=True, cwd="/")
391
self.checker_callback_tag = (gobject.child_watch_add
392
(self.checker.pid,
393
self.checker_callback,
394
data=command))
395
# The checker may have completed before the gobject
396
# watch was added. Check for this.
397
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
398
if pid:
399
gobject.source_remove(self.checker_callback_tag)
400
self.checker_callback(pid, status, command)
401
except OSError, error:
343
self.checker_callback_tag = gobject.child_watch_add\
344
(self.checker.pid,
345
self.checker_callback)
346
except subprocess.OSError, error:
402
347
logger.error(u"Failed to start subprocess: %s",
403
348
error)
404
349
# Re-run this periodically if run by gobject.timeout_add
405
350
return True
406
407
351
def stop_checker(self):
408
352
"""Force the checker process, if any, to stop."""
409
353
if self.checker_callback_tag:
421
365
if error.errno != errno.ESRCH: # No such process
422
366
raise
423
367
self.checker = None
424
425
368
def still_valid(self):
426
369
"""Has the timeout not yet passed for this client?"""
427
if not getattr(self, "enabled", False):
428
return False
429
now = datetime.datetime.utcnow()
370
now = datetime.datetime.now()
430
371
if self.last_checked_ok is None:
431
372
return now < (self.created + self.timeout)
432
373
else:
433
374
return now < (self.last_checked_ok + self.timeout)
434
375
435
376
436
class ClientDBus(Client, dbus.service.Object):
437
"""A Client class using D-Bus
438
439
Attributes:
440
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
441
"""
442
# dbus.service.Object doesn't use super(), so we can't either.
443
444
def __init__(self, *args, **kwargs):
445
Client.__init__(self, *args, **kwargs)
446
# Only now, when this client is initialized, can it show up on
447
# the D-Bus
448
self.dbus_object_path = (dbus.ObjectPath
449
("/clients/"
450
+ self.name.replace(".", "_")))
451
dbus.service.Object.__init__(self, bus,
452
self.dbus_object_path)
453
def enable(self):
454
oldstate = getattr(self, "enabled", False)
455
r = Client.enable(self)
456
if oldstate != self.enabled:
457
# Emit D-Bus signals
458
self.PropertyChanged(dbus.String(u"enabled"),
459
dbus.Boolean(True, variant_level=1))
460
self.PropertyChanged(dbus.String(u"last_enabled"),
461
(_datetime_to_dbus(self.last_enabled,
462
variant_level=1)))
463
return r
464
465
def disable(self, signal = True):
466
oldstate = getattr(self, "enabled", False)
467
r = Client.disable(self)
468
if signal and oldstate != self.enabled:
469
# Emit D-Bus signal
470
self.PropertyChanged(dbus.String(u"enabled"),
471
dbus.Boolean(False, variant_level=1))
472
return r
473
474
def __del__(self, *args, **kwargs):
475
try:
476
self.remove_from_connection()
477
except LookupError:
478
pass
479
if hasattr(dbus.service.Object, "__del__"):
480
dbus.service.Object.__del__(self, *args, **kwargs)
481
Client.__del__(self, *args, **kwargs)
482
483
def checker_callback(self, pid, condition, command,
484
*args, **kwargs):
485
self.checker_callback_tag = None
486
self.checker = None
487
# Emit D-Bus signal
488
self.PropertyChanged(dbus.String(u"checker_running"),
489
dbus.Boolean(False, variant_level=1))
490
if os.WIFEXITED(condition):
491
exitstatus = os.WEXITSTATUS(condition)
492
# Emit D-Bus signal
493
self.CheckerCompleted(dbus.Int16(exitstatus),
494
dbus.Int64(condition),
495
dbus.String(command))
496
else:
497
# Emit D-Bus signal
498
self.CheckerCompleted(dbus.Int16(-1),
499
dbus.Int64(condition),
500
dbus.String(command))
501
502
return Client.checker_callback(self, pid, condition, command,
503
*args, **kwargs)
504
505
def checked_ok(self, *args, **kwargs):
506
r = Client.checked_ok(self, *args, **kwargs)
507
# Emit D-Bus signal
508
self.PropertyChanged(
509
dbus.String(u"last_checked_ok"),
510
(_datetime_to_dbus(self.last_checked_ok,
511
variant_level=1)))
512
return r
513
514
def start_checker(self, *args, **kwargs):
515
old_checker = self.checker
516
if self.checker is not None:
517
old_checker_pid = self.checker.pid
518
else:
519
old_checker_pid = None
520
r = Client.start_checker(self, *args, **kwargs)
521
# Only if new checker process was started
522
if (self.checker is not None
523
and old_checker_pid != self.checker.pid):
524
# Emit D-Bus signal
525
self.CheckerStarted(self.current_checker_command)
526
self.PropertyChanged(
527
dbus.String("checker_running"),
528
dbus.Boolean(True, variant_level=1))
529
return r
530
531
def stop_checker(self, *args, **kwargs):
532
old_checker = getattr(self, "checker", None)
533
r = Client.stop_checker(self, *args, **kwargs)
534
if (old_checker is not None
535
and getattr(self, "checker", None) is None):
536
self.PropertyChanged(dbus.String(u"checker_running"),
537
dbus.Boolean(False, variant_level=1))
538
return r
539
540
## D-Bus methods & signals
541
_interface = u"se.bsnet.fukt.Mandos.Client"
542
543
# CheckedOK - method
544
CheckedOK = dbus.service.method(_interface)(checked_ok)
545
CheckedOK.__name__ = "CheckedOK"
546
547
# CheckerCompleted - signal
548
@dbus.service.signal(_interface, signature="nxs")
549
def CheckerCompleted(self, exitcode, waitstatus, command):
550
"D-Bus signal"
551
pass
552
553
# CheckerStarted - signal
554
@dbus.service.signal(_interface, signature="s")
555
def CheckerStarted(self, command):
556
"D-Bus signal"
557
pass
558
559
# GetAllProperties - method
560
@dbus.service.method(_interface, out_signature="a{sv}")
561
def GetAllProperties(self):
562
"D-Bus method"
563
return dbus.Dictionary({
564
dbus.String("name"):
565
dbus.String(self.name, variant_level=1),
566
dbus.String("fingerprint"):
567
dbus.String(self.fingerprint, variant_level=1),
568
dbus.String("host"):
569
dbus.String(self.host, variant_level=1),
570
dbus.String("created"):
571
_datetime_to_dbus(self.created, variant_level=1),
572
dbus.String("last_enabled"):
573
(_datetime_to_dbus(self.last_enabled,
574
variant_level=1)
575
if self.last_enabled is not None
576
else dbus.Boolean(False, variant_level=1)),
577
dbus.String("enabled"):
578
dbus.Boolean(self.enabled, variant_level=1),
579
dbus.String("last_checked_ok"):
580
(_datetime_to_dbus(self.last_checked_ok,
581
variant_level=1)
582
if self.last_checked_ok is not None
583
else dbus.Boolean (False, variant_level=1)),
584
dbus.String("timeout"):
585
dbus.UInt64(self.timeout_milliseconds(),
586
variant_level=1),
587
dbus.String("interval"):
588
dbus.UInt64(self.interval_milliseconds(),
589
variant_level=1),
590
dbus.String("checker"):
591
dbus.String(self.checker_command,
592
variant_level=1),
593
dbus.String("checker_running"):
594
dbus.Boolean(self.checker is not None,
595
variant_level=1),
596
dbus.String("object_path"):
597
dbus.ObjectPath(self.dbus_object_path,
598
variant_level=1)
599
}, signature="sv")
600
601
# IsStillValid - method
602
@dbus.service.method(_interface, out_signature="b")
603
def IsStillValid(self):
604
return self.still_valid()
605
606
# PropertyChanged - signal
607
@dbus.service.signal(_interface, signature="sv")
608
def PropertyChanged(self, property, value):
609
"D-Bus signal"
610
pass
611
612
# ReceivedSecret - signal
613
@dbus.service.signal(_interface)
614
def ReceivedSecret(self):
615
"D-Bus signal"
616
pass
617
618
# Rejected - signal
619
@dbus.service.signal(_interface)
620
def Rejected(self):
621
"D-Bus signal"
622
pass
623
624
# SetChecker - method
625
@dbus.service.method(_interface, in_signature="s")
626
def SetChecker(self, checker):
627
"D-Bus setter method"
628
self.checker_command = checker
629
# Emit D-Bus signal
630
self.PropertyChanged(dbus.String(u"checker"),
631
dbus.String(self.checker_command,
632
variant_level=1))
633
634
# SetHost - method
635
@dbus.service.method(_interface, in_signature="s")
636
def SetHost(self, host):
637
"D-Bus setter method"
638
self.host = host
639
# Emit D-Bus signal
640
self.PropertyChanged(dbus.String(u"host"),
641
dbus.String(self.host, variant_level=1))
642
643
# SetInterval - method
644
@dbus.service.method(_interface, in_signature="t")
645
def SetInterval(self, milliseconds):
646
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
647
# Emit D-Bus signal
648
self.PropertyChanged(dbus.String(u"interval"),
649
(dbus.UInt64(self.interval_milliseconds(),
650
variant_level=1)))
651
652
# SetSecret - method
653
@dbus.service.method(_interface, in_signature="ay",
654
byte_arrays=True)
655
def SetSecret(self, secret):
656
"D-Bus setter method"
657
self.secret = str(secret)
658
659
# SetTimeout - method
660
@dbus.service.method(_interface, in_signature="t")
661
def SetTimeout(self, milliseconds):
662
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
663
# Emit D-Bus signal
664
self.PropertyChanged(dbus.String(u"timeout"),
665
(dbus.UInt64(self.timeout_milliseconds(),
666
variant_level=1)))
667
668
# Enable - method
669
Enable = dbus.service.method(_interface)(enable)
670
Enable.__name__ = "Enable"
671
672
# StartChecker - method
673
@dbus.service.method(_interface)
674
def StartChecker(self):
675
"D-Bus method"
676
self.start_checker()
677
678
# Disable - method
679
@dbus.service.method(_interface)
680
def Disable(self):
681
"D-Bus method"
682
self.disable()
683
684
# StopChecker - method
685
StopChecker = dbus.service.method(_interface)(stop_checker)
686
StopChecker.__name__ = "StopChecker"
687
688
del _interface
689
690
691
class ClientHandler(SocketServer.BaseRequestHandler, object):
692
"""A class to handle client connections.
693
694
Instantiated once for each connection to handle it.
377
def peer_certificate(session):
378
"Return the peer's OpenPGP certificate as a bytestring"
379
# If not an OpenPGP certificate...
380
if gnutls.library.functions.gnutls_certificate_type_get\
381
(session._c_object) \
382
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
383
# ...do the normal thing
384
return session.peer_certificate
385
list_size = ctypes.c_uint()
386
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
387
(session._c_object, ctypes.byref(list_size))
388
if list_size.value == 0:
389
return None
390
cert = cert_list[0]
391
return ctypes.string_at(cert.data, cert.size)
392
393
394
def fingerprint(openpgp):
395
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
396
# New GnuTLS "datum" with the OpenPGP public key
397
datum = gnutls.library.types.gnutls_datum_t\
398
(ctypes.cast(ctypes.c_char_p(openpgp),
399
ctypes.POINTER(ctypes.c_ubyte)),
400
ctypes.c_uint(len(openpgp)))
401
# New empty GnuTLS certificate
402
crt = gnutls.library.types.gnutls_openpgp_crt_t()
403
gnutls.library.functions.gnutls_openpgp_crt_init\
404
(ctypes.byref(crt))
405
# Import the OpenPGP public key into the certificate
406
gnutls.library.functions.gnutls_openpgp_crt_import\
407
(crt, ctypes.byref(datum),
408
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
409
# New buffer for the fingerprint
410
buffer = ctypes.create_string_buffer(20)
411
buffer_length = ctypes.c_size_t()
412
# Get the fingerprint from the certificate into the buffer
413
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
414
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
415
# Deinit the certificate
416
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
417
# Convert the buffer to a Python bytestring
418
fpr = ctypes.string_at(buffer, buffer_length.value)
419
# Convert the bytestring to hexadecimal notation
420
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
421
return hex_fpr
422
423
424
class tcp_handler(SocketServer.BaseRequestHandler, object):
425
"""A TCP request handler class.
426
Instantiated by IPv6_TCPServer for each request to handle it.
695
427
Note: This will run in its own forked process."""
696
428
697
429
def handle(self):
698
430
logger.info(u"TCP connection from: %s",
699
unicode(self.client_address))
700
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
701
# Open IPC pipe to parent process
702
with closing(os.fdopen(self.server.pipe[1], "w", 1)) as ipc:
703
session = (gnutls.connection
704
.ClientSession(self.request,
705
gnutls.connection
706
.X509Credentials()))
707
708
line = self.request.makefile().readline()
709
logger.debug(u"Protocol version: %r", line)
710
try:
711
if int(line.strip().split()[0]) > 1:
712
raise RuntimeError
713
except (ValueError, IndexError, RuntimeError), error:
714
logger.error(u"Unknown protocol version: %s", error)
715
return
716
717
# Note: gnutls.connection.X509Credentials is really a
718
# generic GnuTLS certificate credentials object so long as
719
# no X.509 keys are added to it. Therefore, we can use it
720
# here despite using OpenPGP certificates.
721
722
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
723
# "+AES-256-CBC", "+SHA1",
724
# "+COMP-NULL", "+CTYPE-OPENPGP",
725
# "+DHE-DSS"))
726
# Use a fallback default, since this MUST be set.
727
priority = self.server.gnutls_priority
728
if priority is None:
729
priority = "NORMAL"
730
(gnutls.library.functions
731
.gnutls_priority_set_direct(session._c_object,
732
priority, None))
733
734
try:
735
session.handshake()
736
except gnutls.errors.GNUTLSError, error:
737
logger.warning(u"Handshake failed: %s", error)
738
# Do not run session.bye() here: the session is not
739
# established. Just abandon the request.
740
return
741
logger.debug(u"Handshake succeeded")
742
try:
743
fpr = self.fingerprint(self.peer_certificate(session))
744
except (TypeError, gnutls.errors.GNUTLSError), error:
745
logger.warning(u"Bad certificate: %s", error)
746
session.bye()
747
return
748
logger.debug(u"Fingerprint: %s", fpr)
749
750
for c in self.server.clients:
751
if c.fingerprint == fpr:
752
client = c
753
break
754
else:
755
ipc.write("NOTFOUND %s\n" % fpr)
756
session.bye()
757
return
758
# Have to check if client.still_valid(), since it is
759
# possible that the client timed out while establishing
760
# the GnuTLS session.
761
if not client.still_valid():
762
ipc.write("INVALID %s\n" % client.name)
763
session.bye()
764
return
765
ipc.write("SENDING %s\n" % client.name)
766
sent_size = 0
767
while sent_size < len(client.secret):
768
sent = session.send(client.secret[sent_size:])
769
logger.debug(u"Sent: %d, remaining: %d",
770
sent, len(client.secret)
771
- (sent_size + sent))
772
sent_size += sent
773
session.bye()
774
775
@staticmethod
776
def peer_certificate(session):
777
"Return the peer's OpenPGP certificate as a bytestring"
778
# If not an OpenPGP certificate...
779
if (gnutls.library.functions
780
.gnutls_certificate_type_get(session._c_object)
781
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
782
# ...do the normal thing
783
return session.peer_certificate
784
list_size = ctypes.c_uint(1)
785
cert_list = (gnutls.library.functions
786
.gnutls_certificate_get_peers
787
(session._c_object, ctypes.byref(list_size)))
788
if not bool(cert_list) and list_size.value != 0:
789
raise gnutls.errors.GNUTLSError("error getting peer"
790
" certificate")
791
if list_size.value == 0:
792
return None
793
cert = cert_list[0]
794
return ctypes.string_at(cert.data, cert.size)
795
796
@staticmethod
797
def fingerprint(openpgp):
798
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
799
# New GnuTLS "datum" with the OpenPGP public key
800
datum = (gnutls.library.types
801
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
802
ctypes.POINTER
803
(ctypes.c_ubyte)),
804
ctypes.c_uint(len(openpgp))))
805
# New empty GnuTLS certificate
806
crt = gnutls.library.types.gnutls_openpgp_crt_t()
807
(gnutls.library.functions
808
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
809
# Import the OpenPGP public key into the certificate
810
(gnutls.library.functions
811
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
812
gnutls.library.constants
813
.GNUTLS_OPENPGP_FMT_RAW))
814
# Verify the self signature in the key
815
crtverify = ctypes.c_uint()
816
(gnutls.library.functions
817
.gnutls_openpgp_crt_verify_self(crt, 0,
818
ctypes.byref(crtverify)))
819
if crtverify.value != 0:
820
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
821
raise (gnutls.errors.CertificateSecurityError
822
("Verify failed"))
823
# New buffer for the fingerprint
824
buf = ctypes.create_string_buffer(20)
825
buf_len = ctypes.c_size_t()
826
# Get the fingerprint from the certificate into the buffer
827
(gnutls.library.functions
828
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
829
ctypes.byref(buf_len)))
830
# Deinit the certificate
831
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
832
# Convert the buffer to a Python bytestring
833
fpr = ctypes.string_at(buf, buf_len.value)
834
# Convert the bytestring to hexadecimal notation
835
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
836
return hex_fpr
837
838
839
class ForkingMixInWithPipe(SocketServer.ForkingMixIn, object):
840
"""Like SocketServer.ForkingMixIn, but also pass a pipe.
841
842
Assumes a gobject.MainLoop event loop.
843
"""
844
def process_request(self, request, client_address):
845
"""Overrides and wraps the original process_request().
846
847
This function creates a new pipe in self.pipe
848
"""
849
self.pipe = os.pipe()
850
super(ForkingMixInWithPipe,
851
self).process_request(request, client_address)
852
os.close(self.pipe[1]) # close write end
853
# Call "handle_ipc" for both data and EOF events
854
gobject.io_add_watch(self.pipe[0],
855
gobject.IO_IN | gobject.IO_HUP,
856
self.handle_ipc)
857
def handle_ipc(source, condition):
858
"""Dummy function; override as necessary"""
859
os.close(source)
860
return False
861
862
863
class IPv6_TCPServer(ForkingMixInWithPipe,
864
SocketServer.TCPServer, object):
865
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
866
431
unicode(self.client_address))
432
session = gnutls.connection.ClientSession\
433
(self.request, gnutls.connection.X509Credentials())
434
435
line = self.request.makefile().readline()
436
logger.debug(u"Protocol version: %r", line)
437
try:
438
if int(line.strip().split()[0]) > 1:
439
raise RuntimeError
440
except (ValueError, IndexError, RuntimeError), error:
441
logger.error(u"Unknown protocol version: %s", error)
442
return
443
444
# Note: gnutls.connection.X509Credentials is really a generic
445
# GnuTLS certificate credentials object so long as no X.509
446
# keys are added to it. Therefore, we can use it here despite
447
# using OpenPGP certificates.
448
449
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
450
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
451
# "+DHE-DSS"))
452
priority = "NORMAL" # Fallback default, since this
453
# MUST be set.
454
if self.server.settings["priority"]:
455
priority = self.server.settings["priority"]
456
gnutls.library.functions.gnutls_priority_set_direct\
457
(session._c_object, priority, None);
458
459
try:
460
session.handshake()
461
except gnutls.errors.GNUTLSError, error:
462
logger.warning(u"Handshake failed: %s", error)
463
# Do not run session.bye() here: the session is not
464
# established. Just abandon the request.
465
return
466
try:
467
fpr = fingerprint(peer_certificate(session))
468
except (TypeError, gnutls.errors.GNUTLSError), error:
469
logger.warning(u"Bad certificate: %s", error)
470
session.bye()
471
return
472
logger.debug(u"Fingerprint: %s", fpr)
473
client = None
474
for c in self.server.clients:
475
if c.fingerprint == fpr:
476
client = c
477
break
478
if not client:
479
logger.warning(u"Client not found for fingerprint: %s",
480
fpr)
481
session.bye()
482
return
483
# Have to check if client.still_valid(), since it is possible
484
# that the client timed out while establishing the GnuTLS
485
# session.
486
if not client.still_valid():
487
logger.warning(u"Client %(name)s is invalid",
488
vars(client))
489
session.bye()
490
return
491
sent_size = 0
492
while sent_size < len(client.secret):
493
sent = session.send(client.secret[sent_size:])
494
logger.debug(u"Sent: %d, remaining: %d",
495
sent, len(client.secret)
496
- (sent_size + sent))
497
sent_size += sent
498
session.bye()
499
500
501
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
502
"""IPv6 TCP server. Accepts 'None' as address and/or port.
867
503
Attributes:
868
enabled: Boolean; whether this server is activated yet
869
interface: None or a network interface name (string)
870
use_ipv6: Boolean; to use IPv6 or not
871
----
504
settings: Server settings
872
505
clients: Set() of Client objects
873
gnutls_priority GnuTLS priority string
874
use_dbus: Boolean; to emit D-Bus signals or not
875
506
"""
876
def __init__(self, server_address, RequestHandlerClass,
877
interface=None, use_ipv6=True, clients=None,
878
gnutls_priority=None, use_dbus=True):
879
self.enabled = False
880
self.interface = interface
881
if use_ipv6:
882
self.address_family = socket.AF_INET6
883
self.clients = clients
884
self.use_dbus = use_dbus
885
self.gnutls_priority = gnutls_priority
886
SocketServer.TCPServer.__init__(self, server_address,
887
RequestHandlerClass)
507
address_family = socket.AF_INET6
508
def __init__(self, *args, **kwargs):
509
if "settings" in kwargs:
510
self.settings = kwargs["settings"]
511
del kwargs["settings"]
512
if "clients" in kwargs:
513
self.clients = kwargs["clients"]
514
del kwargs["clients"]
515
return super(type(self), self).__init__(*args, **kwargs)
888
516
def server_bind(self):
889
517
"""This overrides the normal server_bind() function
890
518
to bind to an interface if one was specified, and also NOT to
891
519
bind to an address or port if they were not specified."""
892
if self.interface is not None:
520
if self.settings["interface"]:
521
# 25 is from /usr/include/asm-i486/socket.h
522
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
893
523
try:
894
524
self.socket.setsockopt(socket.SOL_SOCKET,
895
525
SO_BINDTODEVICE,
896
self.interface + '\0')
526
self.settings["interface"])
897
527
except socket.error, error:
898
528
if error[0] == errno.EPERM:
899
529
logger.error(u"No permission to"
900
530
u" bind to interface %s",
901
self.interface)
531
self.settings["interface"])
902
532
else:
903
raise
533
raise error
904
534
# Only bind(2) the socket if we really need to.
905
535
if self.server_address[0] or self.server_address[1]:
906
536
if not self.server_address[0]:
907
if self.address_family == socket.AF_INET6:
908
any_address = "::" # in6addr_any
909
else:
910
any_address = socket.INADDR_ANY
911
self.server_address = (any_address,
537
in6addr_any = "::"
538
self.server_address = (in6addr_any,
912
539
self.server_address[1])
913
540
elif not self.server_address[1]:
914
541
self.server_address = (self.server_address[0],
915
542
0)
916
# if self.interface:
543
# if self.settings["interface"]:
917
544
# self.server_address = (self.server_address[0],
918
545
# 0, # port
919
546
# 0, # flowinfo
920
547
# if_nametoindex
921
# (self.interface))
922
return SocketServer.TCPServer.server_bind(self)
923
def server_activate(self):
924
if self.enabled:
925
return SocketServer.TCPServer.server_activate(self)
926
def enable(self):
927
self.enabled = True
928
def handle_ipc(self, source, condition, file_objects={}):
929
condition_names = {
930
gobject.IO_IN: "IN", # There is data to read.
931
gobject.IO_OUT: "OUT", # Data can be written (without
932
# blocking).
933
gobject.IO_PRI: "PRI", # There is urgent data to read.
934
gobject.IO_ERR: "ERR", # Error condition.
935
gobject.IO_HUP: "HUP" # Hung up (the connection has been
936
# broken, usually for pipes and
937
# sockets).
938
}
939
conditions_string = ' | '.join(name
940
for cond, name in
941
condition_names.iteritems()
942
if cond & condition)
943
logger.debug("Handling IPC: FD = %d, condition = %s", source,
944
conditions_string)
945
946
# Turn the pipe file descriptor into a Python file object
947
if source not in file_objects:
948
file_objects[source] = os.fdopen(source, "r", 1)
949
950
# Read a line from the file object
951
cmdline = file_objects[source].readline()
952
if not cmdline: # Empty line means end of file
953
# close the IPC pipe
954
file_objects[source].close()
955
del file_objects[source]
956
957
# Stop calling this function
958
return False
959
960
logger.debug("IPC command: %r", cmdline)
961
962
# Parse and act on command
963
cmd, args = cmdline.rstrip("\r\n").split(None, 1)
964
965
if cmd == "NOTFOUND":
966
logger.warning(u"Client not found for fingerprint: %s",
967
args)
968
if self.use_dbus:
969
# Emit D-Bus signal
970
mandos_dbus_service.ClientNotFound(args)
971
elif cmd == "INVALID":
972
for client in self.clients:
973
if client.name == args:
974
logger.warning(u"Client %s is invalid", args)
975
if self.use_dbus:
976
# Emit D-Bus signal
977
client.Rejected()
978
break
979
else:
980
logger.error(u"Unknown client %s is invalid", args)
981
elif cmd == "SENDING":
982
for client in self.clients:
983
if client.name == args:
984
logger.info(u"Sending secret to %s", client.name)
985
client.checked_ok()
986
if self.use_dbus:
987
# Emit D-Bus signal
988
client.ReceivedSecret()
989
break
990
else:
991
logger.error(u"Sending secret to unknown client %s",
992
args)
993
else:
994
logger.error("Unknown IPC command: %r", cmdline)
995
996
# Keep calling this function
997
return True
548
# (self.settings
549
# ["interface"]))
550
return super(type(self), self).server_bind()
998
551
999
552
1000
553
def string_to_delta(interval):
1001
554
"""Parse a string and return a datetime.timedelta
1002
555
1003
556
>>> string_to_delta('7d')
1004
557
datetime.timedelta(7)
1005
558
>>> string_to_delta('60s')
1010
563
datetime.timedelta(1)
1011
564
>>> string_to_delta(u'1w')
1012
565
datetime.timedelta(7)
1013
>>> string_to_delta('5m 30s')
1014
datetime.timedelta(0, 330)
1015
566
"""
1016
timevalue = datetime.timedelta(0)
1017
for s in interval.split():
1018
try:
1019
suffix = unicode(s[-1])
1020
value = int(s[:-1])
1021
if suffix == u"d":
1022
delta = datetime.timedelta(value)
1023
elif suffix == u"s":
1024
delta = datetime.timedelta(0, value)
1025
elif suffix == u"m":
1026
delta = datetime.timedelta(0, 0, 0, 0, value)
1027
elif suffix == u"h":
1028
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1029
elif suffix == u"w":
1030
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1031
else:
1032
raise ValueError
1033
except (ValueError, IndexError):
567
try:
568
suffix=unicode(interval[-1])
569
value=int(interval[:-1])
570
if suffix == u"d":
571
delta = datetime.timedelta(value)
572
elif suffix == u"s":
573
delta = datetime.timedelta(0, value)
574
elif suffix == u"m":
575
delta = datetime.timedelta(0, 0, 0, 0, value)
576
elif suffix == u"h":
577
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
578
elif suffix == u"w":
579
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
580
else:
1034
581
raise ValueError
1035
timevalue += delta
1036
return timevalue
582
except (ValueError, IndexError):
583
raise ValueError
584
return delta
1037
585
1038
586
1039
587
def server_state_changed(state):
1040
588
"""Derived from the Avahi example code"""
1041
589
if state == avahi.SERVER_COLLISION:
1042
logger.error(u"Zeroconf server name collision")
590
logger.error(u"Server name collision")
1043
591
service.remove()
1044
592
elif state == avahi.SERVER_RUNNING:
1045
593
service.add()
1047
595
1048
596
def entry_group_state_changed(state, error):
1049
597
"""Derived from the Avahi example code"""
1050
logger.debug(u"Avahi state change: %i", state)
598
logger.debug(u"state change: %i", state)
1051
599
1052
600
if state == avahi.ENTRY_GROUP_ESTABLISHED:
1053
logger.debug(u"Zeroconf service established.")
601
logger.debug(u"Service established.")
1054
602
elif state == avahi.ENTRY_GROUP_COLLISION:
1055
logger.warning(u"Zeroconf service name collision.")
603
logger.warning(u"Service name collision.")
1056
604
service.rename()
1057
605
elif state == avahi.ENTRY_GROUP_FAILURE:
1058
logger.critical(u"Avahi: Error in group state changed %s",
606
logger.critical(u"Error in group state changed %s",
1059
607
unicode(error))
1060
raise AvahiGroupError(u"State changed: %s" % unicode(error))
608
raise AvahiGroupError("State changed: %s", str(error))
1061
609
1062
610
def if_nametoindex(interface):
1063
611
"""Call the C function if_nametoindex(), or equivalent"""
1064
612
global if_nametoindex
1065
613
try:
1066
if_nametoindex = (ctypes.cdll.LoadLibrary
1067
(ctypes.util.find_library("c"))
1068
.if_nametoindex)
614
if "ctypes.util" not in sys.modules:
615
import ctypes.util
616
if_nametoindex = ctypes.cdll.LoadLibrary\
617
(ctypes.util.find_library("c")).if_nametoindex
1069
618
except (OSError, AttributeError):
1070
619
if "struct" not in sys.modules:
1071
620
import struct
1074
623
def if_nametoindex(interface):
1075
624
"Get an interface index the hard way, i.e. using fcntl()"
1076
625
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1077
with closing(socket.socket()) as s:
1078
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1079
struct.pack("16s16x", interface))
626
s = socket.socket()
627
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
628
struct.pack("16s16x", interface))
629
s.close()
1080
630
interface_index = struct.unpack("I", ifreq[16:20])[0]
1081
631
return interface_index
1082
632
return if_nametoindex(interface)
1084
634
1085
635
def daemon(nochdir = False, noclose = False):
1086
636
"""See daemon(3). Standard BSD Unix function.
1087
1088
637
This should really exist as os.daemon, but it doesn't (yet)."""
1089
638
if os.fork():
1090
639
sys.exit()
1107
656
1108
657
1109
658
def main():
1110
1111
######################################################################
1112
# Parsing of options, both command line and config file
1113
1114
parser = optparse.OptionParser(version = "%%prog %s" % version)
659
global main_loop_started
660
main_loop_started = False
661
662
parser = OptionParser(version = "%%prog %s" % version)
1115
663
parser.add_option("-i", "--interface", type="string",
1116
664
metavar="IF", help="Bind to interface IF")
1117
665
parser.add_option("-a", "--address", type="string",
1118
666
help="Address to listen for requests on")
1119
667
parser.add_option("-p", "--port", type="int",
1120
668
help="Port number to receive requests on")
1121
parser.add_option("--check", action="store_true",
669
parser.add_option("--check", action="store_true", default=False,
1122
670
help="Run self-test")
1123
671
parser.add_option("--debug", action="store_true",
1124
672
help="Debug mode; run in foreground and log to"
1131
679
default="/etc/mandos", metavar="DIR",
1132
680
help="Directory to search for configuration"
1133
681
" files")
1134
parser.add_option("--no-dbus", action="store_false",
1135
dest="use_dbus",
1136
help="Do not provide D-Bus system bus"
1137
" interface")
1138
parser.add_option("--no-ipv6", action="store_false",
1139
dest="use_ipv6", help="Do not use IPv6")
1140
options = parser.parse_args()[0]
682
(options, args) = parser.parse_args()
1141
683
1142
684
if options.check:
1143
685
import doctest
1152
694
"priority":
1153
695
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1154
696
"servicename": "Mandos",
1155
"use_dbus": "True",
1156
"use_ipv6": "True",
1157
697
}
1158
698
1159
699
# Parse config file for server-global settings
1160
700
server_config = ConfigParser.SafeConfigParser(server_defaults)
1161
701
del server_defaults
1162
702
server_config.read(os.path.join(options.configdir, "mandos.conf"))
703
server_section = "server"
1163
704
# Convert the SafeConfigParser object to a dict
1164
server_settings = server_config.defaults()
1165
# Use the appropriate methods on the non-string config options
1166
server_settings["debug"] = server_config.getboolean("DEFAULT",
1167
"debug")
1168
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
1169
"use_dbus")
1170
server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
1171
"use_ipv6")
1172
if server_settings["port"]:
1173
server_settings["port"] = server_config.getint("DEFAULT",
1174
"port")
705
server_settings = dict(server_config.items(server_section))
706
# Use getboolean on the boolean config option
707
server_settings["debug"] = server_config.getboolean\
708
(server_section, "debug")
1175
709
del server_config
1176
710
1177
711
# Override the settings from the config file with command line
1178
712
# options, if set.
1179
713
for option in ("interface", "address", "port", "debug",
1180
"priority", "servicename", "configdir",
1181
"use_dbus", "use_ipv6"):
714
"priority", "servicename", "configdir"):
1182
715
value = getattr(options, option)
1183
716
if value is not None:
1184
717
server_settings[option] = value
1185
718
del options
1186
719
# Now we have our good server settings in "server_settings"
1187
720
1188
##################################################################
1189
1190
# For convenience
1191
721
debug = server_settings["debug"]
1192
use_dbus = server_settings["use_dbus"]
1193
use_ipv6 = server_settings["use_ipv6"]
1194
722
1195
723
if not debug:
1196
724
syslogger.setLevel(logging.WARNING)
1197
725
console.setLevel(logging.WARNING)
1198
726
1199
727
if server_settings["servicename"] != "Mandos":
1200
syslogger.setFormatter(logging.Formatter
1201
('Mandos (%s) [%%(process)d]:'
1202
' %%(levelname)s: %%(message)s'
728
syslogger.setFormatter(logging.Formatter\
729
('Mandos (%s): %%(levelname)s:'
730
' %%(message)s'
1203
731
% server_settings["servicename"]))
1204
732
1205
733
# Parse config file with clients
1206
734
client_defaults = { "timeout": "1h",
1207
735
"interval": "5m",
1208
736
"checker": "fping -q -- %%(host)s",
1209
"host": "",
1210
737
}
1211
738
client_config = ConfigParser.SafeConfigParser(client_defaults)
1212
739
client_config.read(os.path.join(server_settings["configdir"],
1213
740
"clients.conf"))
1214
1215
global mandos_dbus_service
1216
mandos_dbus_service = None
1217
1218
clients = Set()
1219
tcp_server = IPv6_TCPServer((server_settings["address"],
1220
server_settings["port"]),
1221
ClientHandler,
1222
interface=
1223
server_settings["interface"],
1224
use_ipv6=use_ipv6,
1225
clients=clients,
1226
gnutls_priority=
1227
server_settings["priority"],
1228
use_dbus=use_dbus)
1229
pidfilename = "/var/run/mandos.pid"
1230
try:
1231
pidfile = open(pidfilename, "w")
1232
except IOError:
1233
logger.error("Could not open file %r", pidfilename)
1234
1235
try:
1236
uid = pwd.getpwnam("_mandos").pw_uid
1237
gid = pwd.getpwnam("_mandos").pw_gid
1238
except KeyError:
1239
try:
1240
uid = pwd.getpwnam("mandos").pw_uid
1241
gid = pwd.getpwnam("mandos").pw_gid
1242
except KeyError:
1243
try:
1244
uid = pwd.getpwnam("nobody").pw_uid
1245
gid = pwd.getpwnam("nogroup").pw_gid
1246
except KeyError:
1247
uid = 65534
1248
gid = 65534
1249
try:
1250
os.setgid(gid)
1251
os.setuid(uid)
1252
except OSError, error:
1253
if error[0] != errno.EPERM:
1254
raise error
1255
1256
# Enable all possible GnuTLS debugging
1257
if debug:
1258
# "Use a log level over 10 to enable all debugging options."
1259
# - GnuTLS manual
1260
gnutls.library.functions.gnutls_global_set_log_level(11)
1261
1262
@gnutls.library.types.gnutls_log_func
1263
def debug_gnutls(level, string):
1264
logger.debug("GnuTLS: %s", string[:-1])
1265
1266
(gnutls.library.functions
1267
.gnutls_global_set_log_function(debug_gnutls))
1268
741
1269
742
global service
1270
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1271
743
service = AvahiService(name = server_settings["servicename"],
1272
servicetype = "_mandos._tcp",
1273
protocol = protocol)
744
type = "_mandos._tcp", );
1274
745
if server_settings["interface"]:
1275
service.interface = (if_nametoindex
1276
(server_settings["interface"]))
746
service.interface = if_nametoindex(server_settings["interface"])
1277
747
1278
748
global main_loop
1279
749
global bus
1282
752
DBusGMainLoop(set_as_default=True )
1283
753
main_loop = gobject.MainLoop()
1284
754
bus = dbus.SystemBus()
1285
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1286
avahi.DBUS_PATH_SERVER),
1287
avahi.DBUS_INTERFACE_SERVER)
755
server = dbus.Interface(
756
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
757
avahi.DBUS_INTERFACE_SERVER )
1288
758
# End of Avahi example code
1289
if use_dbus:
1290
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1291
1292
client_class = Client
1293
if use_dbus:
1294
client_class = ClientDBus
1295
clients.update(Set(
1296
client_class(name = section,
1297
config= dict(client_config.items(section)))
1298
for section in client_config.sections()))
759
760
clients = Set()
761
def remove_from_clients(client):
762
clients.remove(client)
763
if not clients:
764
logger.critical(u"No clients left, exiting")
765
sys.exit()
766
767
clients.update(Set(Client(name = section,
768
stop_hook = remove_from_clients,
769
config
770
= dict(client_config.items(section)))
771
for section in client_config.sections()))
1299
772
if not clients:
1300
logger.warning(u"No clients defined")
773
logger.critical(u"No clients defined")
774
sys.exit(1)
1301
775
1302
if debug:
1303
# Redirect stdin so all checkers get /dev/null
1304
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1305
os.dup2(null, sys.stdin.fileno())
1306
if null > 2:
1307
os.close(null)
1308
else:
1309
# No console logging
776
if not debug:
1310
777
logger.removeHandler(console)
1311
# Close all input and output, do double fork, etc.
1312
778
daemon()
1313
779
780
pidfilename = "/var/run/mandos/mandos.pid"
781
pid = os.getpid()
1314
782
try:
1315
with closing(pidfile):
1316
pid = os.getpid()
1317
pidfile.write(str(pid) + "\n")
783
pidfile = open(pidfilename, "w")
784
pidfile.write(str(pid) + "\n")
785
pidfile.close()
1318
786
del pidfile
1319
except IOError:
1320
logger.error(u"Could not write to file %r with PID %d",
1321
pidfilename, pid)
1322
except NameError:
1323
# "pidfile" was never created
1324
pass
1325
del pidfilename
787
except IOError, err:
788
logger.error(u"Could not write %s file with PID %d",
789
pidfilename, os.getpid())
1326
790
1327
791
def cleanup():
1328
792
"Cleanup function; run on exit"
1335
799
1336
800
while clients:
1337
801
client = clients.pop()
1338
client.disable_hook = None
1339
client.disable()
802
client.stop_hook = None
803
client.stop()
1340
804
1341
805
atexit.register(cleanup)
1342
806
1345
809
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1346
810
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1347
811
1348
if use_dbus:
1349
class MandosDBusService(dbus.service.Object):
1350
"""A D-Bus proxy object"""
1351
def __init__(self):
1352
dbus.service.Object.__init__(self, bus, "/")
1353
_interface = u"se.bsnet.fukt.Mandos"
1354
1355
@dbus.service.signal(_interface, signature="oa{sv}")
1356
def ClientAdded(self, objpath, properties):
1357
"D-Bus signal"
1358
pass
1359
1360
@dbus.service.signal(_interface, signature="s")
1361
def ClientNotFound(self, fingerprint):
1362
"D-Bus signal"
1363
pass
1364
1365
@dbus.service.signal(_interface, signature="os")
1366
def ClientRemoved(self, objpath, name):
1367
"D-Bus signal"
1368
pass
1369
1370
@dbus.service.method(_interface, out_signature="ao")
1371
def GetAllClients(self):
1372
"D-Bus method"
1373
return dbus.Array(c.dbus_object_path for c in clients)
1374
1375
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1376
def GetAllClientsWithProperties(self):
1377
"D-Bus method"
1378
return dbus.Dictionary(
1379
((c.dbus_object_path, c.GetAllProperties())
1380
for c in clients),
1381
signature="oa{sv}")
1382
1383
@dbus.service.method(_interface, in_signature="o")
1384
def RemoveClient(self, object_path):
1385
"D-Bus method"
1386
for c in clients:
1387
if c.dbus_object_path == object_path:
1388
clients.remove(c)
1389
c.remove_from_connection()
1390
# Don't signal anything except ClientRemoved
1391
c.disable(signal=False)
1392
# Emit D-Bus signal
1393
self.ClientRemoved(object_path, c.name)
1394
return
1395
raise KeyError
1396
1397
del _interface
1398
1399
mandos_dbus_service = MandosDBusService()
1400
1401
812
for client in clients:
1402
if use_dbus:
1403
# Emit D-Bus signal
1404
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1405
client.GetAllProperties())
1406
client.enable()
1407
1408
tcp_server.enable()
1409
tcp_server.server_activate()
1410
813
client.start()
814
815
tcp_server = IPv6_TCPServer((server_settings["address"],
816
server_settings["port"]),
817
tcp_handler,
818
settings=server_settings,
819
clients=clients)
1411
820
# Find out what port we got
1412
821
service.port = tcp_server.socket.getsockname()[1]
1413
if use_ipv6:
1414
logger.info(u"Now listening on address %r, port %d,"
1415
" flowinfo %d, scope_id %d"
1416
% tcp_server.socket.getsockname())
1417
else: # IPv4
1418
logger.info(u"Now listening on address %r, port %d"
1419
% tcp_server.socket.getsockname())
822
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
823
u" scope_id %d" % tcp_server.socket.getsockname())
1420
824
1421
825
#service.interface = tcp_server.socket.getsockname()[3]
1422
826
1432
836
1433
837
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1434
838
lambda *args, **kwargs:
1435
(tcp_server.handle_request
1436
(*args[2:], **kwargs) or True))
839
tcp_server.handle_request\
840
(*args[2:], **kwargs) or True)
1437
841
1438
842
logger.debug(u"Starting main loop")
843
main_loop_started = True
1439
844
main_loop.run()
1440
845
except AvahiError, error:
1441
logger.critical(u"AvahiError: %s", error)
846
logger.critical(u"AvahiError: %s" + unicode(error))
1442
847
sys.exit(1)
1443
848
except KeyboardInterrupt:
1444
849
if debug:
1445
print >> sys.stderr
1446
logger.debug("Server received KeyboardInterrupt")
1447
logger.debug("Server exiting")
850
print
1448
851
1449
852
if __name__ == '__main__':
1450
853
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0