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- Committer: Teddy Hogeborn
- Date: 2008-09-03 19:37:07 UTC
- Revision ID: teddy@fukt.bsnet.se-20080903193707-sas85ud9r37ubs9r
* mandos-clients.conf.xml (OPTIONS): Add info to all options about
whether it is a required or
optional.
whether it is a required or
optional.
- files added:
- plugins.d/usplash
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- .bzrignore
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
#
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
31
30
# Contact the authors at <mandos@fukt.bsnet.se>.
32
31
#
33
32
34
from __future__ import division, with_statement, absolute_import
33
from __future__ import division
35
34
36
import SocketServer as socketserver
35
import SocketServer
37
36
import socket
38
import optparse
37
import select
38
from optparse import OptionParser
39
39
import datetime
40
40
import errno
41
41
import gnutls.crypto
44
44
import gnutls.library.functions
45
45
import gnutls.library.constants
46
46
import gnutls.library.types
47
import ConfigParser as configparser
47
import ConfigParser
48
48
import sys
49
49
import re
50
50
import os
51
51
import signal
52
from sets import Set
52
53
import subprocess
53
54
import atexit
54
55
import stat
55
56
import logging
56
57
import logging.handlers
57
import pwd
58
from contextlib import closing
59
import struct
60
import fcntl
61
import functools
62
58
63
59
import dbus
64
import dbus.service
65
60
import gobject
66
61
import avahi
67
62
from dbus.mainloop.glib import DBusGMainLoop
68
63
import ctypes
69
import ctypes.util
70
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
73
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
96
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
122
102
TXT: list of strings; TXT record for the service
125
105
max_renames: integer; maximum number of renames
126
106
rename_count: integer; counter so we only rename after collisions
127
107
a sensible number of times
128
group: D-Bus Entry Group
129
server: D-Bus Server
130
108
"""
131
109
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
132
servicetype = None, port = None, TXT = None,
133
domain = u"", host = u"", max_renames = 32768,
134
protocol = avahi.PROTO_UNSPEC, bus = None):
110
type = None, port = None, TXT = None, domain = "",
111
host = "", max_renames = 32768):
135
112
self.interface = interface
136
113
self.name = name
137
self.type = servicetype
114
self.type = type
138
115
self.port = port
139
self.TXT = TXT if TXT is not None else []
116
if TXT is None:
117
self.TXT = []
118
else:
119
self.TXT = TXT
140
120
self.domain = domain
141
121
self.host = host
142
122
self.rename_count = 0
143
123
self.max_renames = max_renames
144
self.protocol = protocol
145
self.group = None # our entry group
146
self.server = None
147
self.bus = bus
148
124
def rename(self):
149
125
"""Derived from the Avahi example code"""
150
126
if self.rename_count >= self.max_renames:
151
127
logger.critical(u"No suitable Zeroconf service name found"
152
128
u" after %i retries, exiting.",
153
self.rename_count)
154
raise AvahiServiceError(u"Too many renames")
155
self.name = self.server.GetAlternativeServiceName(self.name)
129
rename_count)
130
raise AvahiServiceError("Too many renames")
131
self.name = server.GetAlternativeServiceName(self.name)
156
132
logger.info(u"Changing Zeroconf service name to %r ...",
157
unicode(self.name))
158
syslogger.setFormatter(logging.Formatter
159
(u'Mandos (%s) [%%(process)d]:'
160
u' %%(levelname)s: %%(message)s'
161
% self.name))
133
str(self.name))
134
syslogger.setFormatter(logging.Formatter\
135
('Mandos (%s): %%(levelname)s:'
136
' %%(message)s' % self.name))
162
137
self.remove()
163
138
self.add()
164
139
self.rename_count += 1
165
140
def remove(self):
166
141
"""Derived from the Avahi example code"""
167
if self.group is not None:
168
self.group.Reset()
142
if group is not None:
143
group.Reset()
169
144
def add(self):
170
145
"""Derived from the Avahi example code"""
171
if self.group is None:
172
self.group = dbus.Interface(
173
self.bus.get_object(avahi.DBUS_NAME,
174
self.server.EntryGroupNew()),
175
avahi.DBUS_INTERFACE_ENTRY_GROUP)
176
self.group.connect_to_signal('StateChanged',
177
self.entry_group_state_changed)
146
global group
147
if group is None:
148
group = dbus.Interface\
149
(bus.get_object(avahi.DBUS_NAME,
150
server.EntryGroupNew()),
151
avahi.DBUS_INTERFACE_ENTRY_GROUP)
152
group.connect_to_signal('StateChanged',
153
entry_group_state_changed)
178
154
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
179
self.name, self.type)
180
self.group.AddService(
181
self.interface,
182
self.protocol,
183
dbus.UInt32(0), # flags
184
self.name, self.type,
185
self.domain, self.host,
186
dbus.UInt16(self.port),
187
avahi.string_array_to_txt_array(self.TXT))
188
self.group.Commit()
189
def entry_group_state_changed(self, state, error):
190
"""Derived from the Avahi example code"""
191
logger.debug(u"Avahi state change: %i", state)
192
193
if state == avahi.ENTRY_GROUP_ESTABLISHED:
194
logger.debug(u"Zeroconf service established.")
195
elif state == avahi.ENTRY_GROUP_COLLISION:
196
logger.warning(u"Zeroconf service name collision.")
197
self.rename()
198
elif state == avahi.ENTRY_GROUP_FAILURE:
199
logger.critical(u"Avahi: Error in group state changed %s",
200
unicode(error))
201
raise AvahiGroupError(u"State changed: %s"
202
% unicode(error))
203
def cleanup(self):
204
"""Derived from the Avahi example code"""
205
if self.group is not None:
206
self.group.Free()
207
self.group = None
208
def server_state_changed(self, state):
209
"""Derived from the Avahi example code"""
210
if state == avahi.SERVER_COLLISION:
211
logger.error(u"Zeroconf server name collision")
212
self.remove()
213
elif state == avahi.SERVER_RUNNING:
214
self.add()
215
def activate(self):
216
"""Derived from the Avahi example code"""
217
if self.server is None:
218
self.server = dbus.Interface(
219
self.bus.get_object(avahi.DBUS_NAME,
220
avahi.DBUS_PATH_SERVER),
221
avahi.DBUS_INTERFACE_SERVER)
222
self.server.connect_to_signal(u"StateChanged",
223
self.server_state_changed)
224
self.server_state_changed(self.server.GetState())
155
service.name, service.type)
156
group.AddService(
157
self.interface, # interface
158
avahi.PROTO_INET6, # protocol
159
dbus.UInt32(0), # flags
160
self.name, self.type,
161
self.domain, self.host,
162
dbus.UInt16(self.port),
163
avahi.string_array_to_txt_array(self.TXT))
164
group.Commit()
165
166
# From the Avahi example code:
167
group = None # our entry group
168
# End of Avahi example code
225
169
226
170
227
171
class Client(object):
228
172
"""A representation of a client host served by this server.
229
230
173
Attributes:
231
name: string; from the config file, used in log messages and
232
D-Bus identifiers
174
name: string; from the config file, used in log messages
233
175
fingerprint: string (40 or 32 hexadecimal digits); used to
234
176
uniquely identify the client
235
secret: bytestring; sent verbatim (over TLS) to client
236
host: string; available for use by the checker command
237
created: datetime.datetime(); (UTC) object creation
238
last_enabled: datetime.datetime(); (UTC)
239
enabled: bool()
240
last_checked_ok: datetime.datetime(); (UTC) or None
241
timeout: datetime.timedelta(); How long from last_checked_ok
242
until this client is invalid
243
interval: datetime.timedelta(); How often to start a new checker
244
disable_hook: If set, called by disable() as disable_hook(self)
245
checker: subprocess.Popen(); a running checker process used
246
to see if the client lives.
247
'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.
248
188
checker_initiator_tag: a gobject event source tag, or None
249
disable_initiator_tag: - '' -
189
stop_initiator_tag: - '' -
250
190
checker_callback_tag: - '' -
251
191
checker_command: string; External command which is run to check if
252
192
client lives. %() expansions are done at
253
193
runtime with vars(self) as dict, so that for
254
194
instance %(name)s can be used in the command.
255
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: - '' -
256
200
"""
257
258
@staticmethod
259
def _datetime_to_milliseconds(dt):
260
"Convert a datetime.datetime() to milliseconds"
261
return ((dt.days * 24 * 60 * 60 * 1000)
262
+ (dt.seconds * 1000)
263
+ (dt.microseconds // 1000))
264
265
def timeout_milliseconds(self):
266
"Return the 'timeout' attribute in milliseconds"
267
return self._datetime_to_milliseconds(self.timeout)
268
269
def interval_milliseconds(self):
270
"Return the 'interval' attribute in milliseconds"
271
return self._datetime_to_milliseconds(self.interval)
272
273
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={}):
274
225
"""Note: the 'checker' key in 'config' sets the
275
226
'checker_command' attribute and *not* the 'checker'
276
227
attribute."""
277
228
self.name = name
278
if config is None:
279
config = {}
280
229
logger.debug(u"Creating client %r", self.name)
281
230
# Uppercase and remove spaces from fingerprint for later
282
231
# comparison purposes with return value from the fingerprint()
283
232
# function
284
self.fingerprint = (config[u"fingerprint"].upper()
285
.replace(u" ", u""))
233
self.fingerprint = config["fingerprint"].upper()\
234
.replace(u" ", u"")
286
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
287
if u"secret" in config:
288
self.secret = config[u"secret"].decode(u"base64")
289
elif u"secfile" in config:
290
with closing(open(os.path.expanduser
291
(os.path.expandvars
292
(config[u"secfile"])))) as secfile:
293
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()
294
242
else:
295
243
raise TypeError(u"No secret or secfile for client %s"
296
244
% self.name)
297
self.host = config.get(u"host", u"")
298
self.created = datetime.datetime.utcnow()
299
self.enabled = False
300
self.last_enabled = None
245
self.host = config.get("host", "")
246
self.created = datetime.datetime.now()
301
247
self.last_checked_ok = None
302
self.timeout = string_to_delta(config[u"timeout"])
303
self.interval = string_to_delta(config[u"interval"])
304
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
305
251
self.checker = None
306
252
self.checker_initiator_tag = None
307
self.disable_initiator_tag = None
253
self.stop_initiator_tag = None
308
254
self.checker_callback_tag = None
309
self.checker_command = config[u"checker"]
310
self.current_checker_command = None
311
self.last_connect = None
312
313
def enable(self):
255
self.check_command = config["checker"]
256
def start(self):
314
257
"""Start this client's checker and timeout hooks"""
315
self.last_enabled = datetime.datetime.utcnow()
316
258
# Schedule a new checker to be started an 'interval' from now,
317
259
# and every interval from then on.
318
self.checker_initiator_tag = (gobject.timeout_add
319
(self.interval_milliseconds(),
320
self.start_checker))
260
self.checker_initiator_tag = gobject.timeout_add\
261
(self._interval_milliseconds,
262
self.start_checker)
321
263
# Also start a new checker *right now*.
322
264
self.start_checker()
323
# Schedule a disable() when 'timeout' has passed
324
self.disable_initiator_tag = (gobject.timeout_add
325
(self.timeout_milliseconds(),
326
self.disable))
327
self.enabled = True
328
329
def disable(self):
330
"""Disable this client."""
331
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:
332
278
return False
333
logger.info(u"Disabling client %s", self.name)
334
if getattr(self, u"disable_initiator_tag", False):
335
gobject.source_remove(self.disable_initiator_tag)
336
self.disable_initiator_tag = None
337
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):
338
283
gobject.source_remove(self.checker_initiator_tag)
339
284
self.checker_initiator_tag = None
340
285
self.stop_checker()
341
if self.disable_hook:
342
self.disable_hook(self)
343
self.enabled = False
286
if self.stop_hook:
287
self.stop_hook(self)
344
288
# Do not run this again if called by a gobject.timeout_add
345
289
return False
346
347
290
def __del__(self):
348
self.disable_hook = None
349
self.disable()
350
351
def checker_callback(self, pid, condition, command):
291
self.stop_hook = None
292
self.stop()
293
def checker_callback(self, pid, condition):
352
294
"""The checker has completed, so take appropriate actions."""
295
now = datetime.datetime.now()
353
296
self.checker_callback_tag = None
354
297
self.checker = None
355
if os.WIFEXITED(condition):
356
exitstatus = os.WEXITSTATUS(condition)
357
if exitstatus == 0:
358
logger.info(u"Checker for %(name)s succeeded",
359
vars(self))
360
self.checked_ok()
361
else:
362
logger.info(u"Checker for %(name)s failed",
363
vars(self))
364
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):
365
308
logger.warning(u"Checker for %(name)s crashed?",
366
309
vars(self))
367
368
def checked_ok(self):
369
"""Bump up the timeout for this client.
370
371
This should only be called when the client has been seen,
372
alive and well.
373
"""
374
self.last_checked_ok = datetime.datetime.utcnow()
375
gobject.source_remove(self.disable_initiator_tag)
376
self.disable_initiator_tag = (gobject.timeout_add
377
(self.timeout_milliseconds(),
378
self.disable))
379
310
else:
311
logger.info(u"Checker for %(name)s failed",
312
vars(self))
380
313
def start_checker(self):
381
314
"""Start a new checker subprocess if one is not running.
382
383
315
If a checker already exists, leave it running and do
384
316
nothing."""
385
317
# The reason for not killing a running checker is that if we
390
322
# checkers alone, the checker would have to take more time
391
323
# than 'timeout' for the client to be declared invalid, which
392
324
# is as it should be.
393
394
# If a checker exists, make sure it is not a zombie
395
if self.checker is not None:
396
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
397
if pid:
398
logger.warning(u"Checker was a zombie")
399
gobject.source_remove(self.checker_callback_tag)
400
self.checker_callback(pid, status,
401
self.current_checker_command)
402
# Start a new checker if needed
403
325
if self.checker is None:
404
326
try:
405
# In case checker_command has exactly one % operator
406
command = self.checker_command % self.host
327
# In case check_command has exactly one % operator
328
command = self.check_command % self.host
407
329
except TypeError:
408
330
# Escape attributes for the shell
409
escaped_attrs = dict((key,
410
re.escape(unicode(str(val),
411
errors=
412
u'replace')))
331
escaped_attrs = dict((key, re.escape(str(val)))
413
332
for key, val in
414
333
vars(self).iteritems())
415
334
try:
416
command = self.checker_command % escaped_attrs
335
command = self.check_command % escaped_attrs
417
336
except TypeError, error:
418
337
logger.error(u'Could not format string "%s":'
419
u' %s', self.checker_command, error)
338
u' %s', self.check_command, error)
420
339
return True # Try again later
421
self.current_checker_command = command
422
340
try:
423
341
logger.info(u"Starting checker %r for %s",
424
342
command, self.name)
428
346
# always replaced by /dev/null.)
429
347
self.checker = subprocess.Popen(command,
430
348
close_fds=True,
431
shell=True, cwd=u"/")
432
self.checker_callback_tag = (gobject.child_watch_add
433
(self.checker.pid,
434
self.checker_callback,
435
data=command))
436
# The checker may have completed before the gobject
437
# watch was added. Check for this.
438
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
439
if pid:
440
gobject.source_remove(self.checker_callback_tag)
441
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)
442
353
except OSError, error:
443
354
logger.error(u"Failed to start subprocess: %s",
444
355
error)
445
356
# Re-run this periodically if run by gobject.timeout_add
446
357
return True
447
448
358
def stop_checker(self):
449
359
"""Force the checker process, if any, to stop."""
450
360
if self.checker_callback_tag:
451
361
gobject.source_remove(self.checker_callback_tag)
452
362
self.checker_callback_tag = None
453
if getattr(self, u"checker", None) is None:
363
if getattr(self, "checker", None) is None:
454
364
return
455
365
logger.debug(u"Stopping checker for %(name)s", vars(self))
456
366
try:
462
372
if error.errno != errno.ESRCH: # No such process
463
373
raise
464
374
self.checker = None
465
466
375
def still_valid(self):
467
376
"""Has the timeout not yet passed for this client?"""
468
if not getattr(self, u"enabled", False):
469
return False
470
now = datetime.datetime.utcnow()
377
now = datetime.datetime.now()
471
378
if self.last_checked_ok is None:
472
379
return now < (self.created + self.timeout)
473
380
else:
474
381
return now < (self.last_checked_ok + self.timeout)
475
382
476
383
477
class ClientDBus(Client, dbus.service.Object):
478
"""A Client class using D-Bus
479
480
Attributes:
481
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
482
"""
483
# dbus.service.Object doesn't use super(), so we can't either.
484
485
def __init__(self, bus = None, *args, **kwargs):
486
self.bus = bus
487
Client.__init__(self, *args, **kwargs)
488
# Only now, when this client is initialized, can it show up on
489
# the D-Bus
490
self.dbus_object_path = (dbus.ObjectPath
491
(u"/clients/"
492
+ self.name.replace(u".", u"_")))
493
dbus.service.Object.__init__(self, self.bus,
494
self.dbus_object_path)
495
496
@staticmethod
497
def _datetime_to_dbus(dt, variant_level=0):
498
"""Convert a UTC datetime.datetime() to a D-Bus type."""
499
return dbus.String(dt.isoformat(),
500
variant_level=variant_level)
501
502
def enable(self):
503
oldstate = getattr(self, u"enabled", False)
504
r = Client.enable(self)
505
if oldstate != self.enabled:
506
# Emit D-Bus signals
507
self.PropertyChanged(dbus.String(u"enabled"),
508
dbus.Boolean(True, variant_level=1))
509
self.PropertyChanged(
510
dbus.String(u"last_enabled"),
511
self._datetime_to_dbus(self.last_enabled,
512
variant_level=1))
513
return r
514
515
def disable(self, signal = True):
516
oldstate = getattr(self, u"enabled", False)
517
r = Client.disable(self)
518
if signal and oldstate != self.enabled:
519
# Emit D-Bus signal
520
self.PropertyChanged(dbus.String(u"enabled"),
521
dbus.Boolean(False, variant_level=1))
522
return r
523
524
def __del__(self, *args, **kwargs):
525
try:
526
self.remove_from_connection()
527
except LookupError:
528
pass
529
if hasattr(dbus.service.Object, u"__del__"):
530
dbus.service.Object.__del__(self, *args, **kwargs)
531
Client.__del__(self, *args, **kwargs)
532
533
def checker_callback(self, pid, condition, command,
534
*args, **kwargs):
535
self.checker_callback_tag = None
536
self.checker = None
537
# Emit D-Bus signal
538
self.PropertyChanged(dbus.String(u"checker_running"),
539
dbus.Boolean(False, variant_level=1))
540
if os.WIFEXITED(condition):
541
exitstatus = os.WEXITSTATUS(condition)
542
# Emit D-Bus signal
543
self.CheckerCompleted(dbus.Int16(exitstatus),
544
dbus.Int64(condition),
545
dbus.String(command))
546
else:
547
# Emit D-Bus signal
548
self.CheckerCompleted(dbus.Int16(-1),
549
dbus.Int64(condition),
550
dbus.String(command))
551
552
return Client.checker_callback(self, pid, condition, command,
553
*args, **kwargs)
554
555
def checked_ok(self, *args, **kwargs):
556
r = Client.checked_ok(self, *args, **kwargs)
557
# Emit D-Bus signal
558
self.PropertyChanged(
559
dbus.String(u"last_checked_ok"),
560
(self._datetime_to_dbus(self.last_checked_ok,
561
variant_level=1)))
562
return r
563
564
def start_checker(self, *args, **kwargs):
565
old_checker = self.checker
566
if self.checker is not None:
567
old_checker_pid = self.checker.pid
568
else:
569
old_checker_pid = None
570
r = Client.start_checker(self, *args, **kwargs)
571
# Only if new checker process was started
572
if (self.checker is not None
573
and old_checker_pid != self.checker.pid):
574
# Emit D-Bus signal
575
self.CheckerStarted(self.current_checker_command)
576
self.PropertyChanged(
577
dbus.String(u"checker_running"),
578
dbus.Boolean(True, variant_level=1))
579
return r
580
581
def stop_checker(self, *args, **kwargs):
582
old_checker = getattr(self, u"checker", None)
583
r = Client.stop_checker(self, *args, **kwargs)
584
if (old_checker is not None
585
and getattr(self, u"checker", None) is None):
586
self.PropertyChanged(dbus.String(u"checker_running"),
587
dbus.Boolean(False, variant_level=1))
588
return r
589
590
## D-Bus methods & signals
591
_interface = u"se.bsnet.fukt.Mandos.Client"
592
593
# CheckedOK - method
594
@dbus.service.method(_interface)
595
def CheckedOK(self):
596
return self.checked_ok()
597
598
# CheckerCompleted - signal
599
@dbus.service.signal(_interface, signature=u"nxs")
600
def CheckerCompleted(self, exitcode, waitstatus, command):
601
"D-Bus signal"
602
pass
603
604
# CheckerStarted - signal
605
@dbus.service.signal(_interface, signature=u"s")
606
def CheckerStarted(self, command):
607
"D-Bus signal"
608
pass
609
610
# GetAllProperties - method
611
@dbus.service.method(_interface, out_signature=u"a{sv}")
612
def GetAllProperties(self):
613
"D-Bus method"
614
return dbus.Dictionary({
615
dbus.String(u"name"):
616
dbus.String(self.name, variant_level=1),
617
dbus.String(u"fingerprint"):
618
dbus.String(self.fingerprint, variant_level=1),
619
dbus.String(u"host"):
620
dbus.String(self.host, variant_level=1),
621
dbus.String(u"created"):
622
self._datetime_to_dbus(self.created,
623
variant_level=1),
624
dbus.String(u"last_enabled"):
625
(self._datetime_to_dbus(self.last_enabled,
626
variant_level=1)
627
if self.last_enabled is not None
628
else dbus.Boolean(False, variant_level=1)),
629
dbus.String(u"enabled"):
630
dbus.Boolean(self.enabled, variant_level=1),
631
dbus.String(u"last_checked_ok"):
632
(self._datetime_to_dbus(self.last_checked_ok,
633
variant_level=1)
634
if self.last_checked_ok is not None
635
else dbus.Boolean (False, variant_level=1)),
636
dbus.String(u"timeout"):
637
dbus.UInt64(self.timeout_milliseconds(),
638
variant_level=1),
639
dbus.String(u"interval"):
640
dbus.UInt64(self.interval_milliseconds(),
641
variant_level=1),
642
dbus.String(u"checker"):
643
dbus.String(self.checker_command,
644
variant_level=1),
645
dbus.String(u"checker_running"):
646
dbus.Boolean(self.checker is not None,
647
variant_level=1),
648
dbus.String(u"object_path"):
649
dbus.ObjectPath(self.dbus_object_path,
650
variant_level=1)
651
}, signature=u"sv")
652
653
# IsStillValid - method
654
@dbus.service.method(_interface, out_signature=u"b")
655
def IsStillValid(self):
656
return self.still_valid()
657
658
# PropertyChanged - signal
659
@dbus.service.signal(_interface, signature=u"sv")
660
def PropertyChanged(self, property, value):
661
"D-Bus signal"
662
pass
663
664
# ReceivedSecret - signal
665
@dbus.service.signal(_interface)
666
def ReceivedSecret(self):
667
"D-Bus signal"
668
pass
669
670
# Rejected - signal
671
@dbus.service.signal(_interface)
672
def Rejected(self):
673
"D-Bus signal"
674
pass
675
676
# SetChecker - method
677
@dbus.service.method(_interface, in_signature=u"s")
678
def SetChecker(self, checker):
679
"D-Bus setter method"
680
self.checker_command = checker
681
# Emit D-Bus signal
682
self.PropertyChanged(dbus.String(u"checker"),
683
dbus.String(self.checker_command,
684
variant_level=1))
685
686
# SetHost - method
687
@dbus.service.method(_interface, in_signature=u"s")
688
def SetHost(self, host):
689
"D-Bus setter method"
690
self.host = host
691
# Emit D-Bus signal
692
self.PropertyChanged(dbus.String(u"host"),
693
dbus.String(self.host, variant_level=1))
694
695
# SetInterval - method
696
@dbus.service.method(_interface, in_signature=u"t")
697
def SetInterval(self, milliseconds):
698
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
699
# Emit D-Bus signal
700
self.PropertyChanged(dbus.String(u"interval"),
701
(dbus.UInt64(self.interval_milliseconds(),
702
variant_level=1)))
703
704
# SetSecret - method
705
@dbus.service.method(_interface, in_signature=u"ay",
706
byte_arrays=True)
707
def SetSecret(self, secret):
708
"D-Bus setter method"
709
self.secret = str(secret)
710
711
# SetTimeout - method
712
@dbus.service.method(_interface, in_signature=u"t")
713
def SetTimeout(self, milliseconds):
714
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
715
# Emit D-Bus signal
716
self.PropertyChanged(dbus.String(u"timeout"),
717
(dbus.UInt64(self.timeout_milliseconds(),
718
variant_level=1)))
719
720
# Enable - method
721
@dbus.service.method(_interface)
722
def Enable(self):
723
"D-Bus method"
724
self.enable()
725
726
# StartChecker - method
727
@dbus.service.method(_interface)
728
def StartChecker(self):
729
"D-Bus method"
730
self.start_checker()
731
732
# Disable - method
733
@dbus.service.method(_interface)
734
def Disable(self):
735
"D-Bus method"
736
self.disable()
737
738
# StopChecker - method
739
@dbus.service.method(_interface)
740
def StopChecker(self):
741
self.stop_checker()
742
743
del _interface
744
745
746
class ClientHandler(socketserver.BaseRequestHandler, object):
747
"""A class to handle client connections.
748
749
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.
750
441
Note: This will run in its own forked process."""
751
442
752
443
def handle(self):
753
444
logger.info(u"TCP connection from: %s",
754
unicode(self.client_address))
755
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
756
# Open IPC pipe to parent process
757
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
758
session = (gnutls.connection
759
.ClientSession(self.request,
760
gnutls.connection
761
.X509Credentials()))
762
763
line = self.request.makefile().readline()
764
logger.debug(u"Protocol version: %r", line)
765
try:
766
if int(line.strip().split()[0]) > 1:
767
raise RuntimeError
768
except (ValueError, IndexError, RuntimeError), error:
769
logger.error(u"Unknown protocol version: %s", error)
770
return
771
772
# Note: gnutls.connection.X509Credentials is really a
773
# generic GnuTLS certificate credentials object so long as
774
# no X.509 keys are added to it. Therefore, we can use it
775
# here despite using OpenPGP certificates.
776
777
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
778
# u"+AES-256-CBC", u"+SHA1",
779
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
780
# u"+DHE-DSS"))
781
# Use a fallback default, since this MUST be set.
782
priority = self.server.gnutls_priority
783
if priority is None:
784
priority = u"NORMAL"
785
(gnutls.library.functions
786
.gnutls_priority_set_direct(session._c_object,
787
priority, None))
788
789
try:
790
session.handshake()
791
except gnutls.errors.GNUTLSError, error:
792
logger.warning(u"Handshake failed: %s", error)
793
# Do not run session.bye() here: the session is not
794
# established. Just abandon the request.
795
return
796
logger.debug(u"Handshake succeeded")
797
try:
798
fpr = self.fingerprint(self.peer_certificate(session))
799
except (TypeError, gnutls.errors.GNUTLSError), error:
800
logger.warning(u"Bad certificate: %s", error)
801
session.bye()
802
return
803
logger.debug(u"Fingerprint: %s", fpr)
804
805
for c in self.server.clients:
806
if c.fingerprint == fpr:
807
client = c
808
break
809
else:
810
ipc.write(u"NOTFOUND %s\n" % fpr)
811
session.bye()
812
return
813
# Have to check if client.still_valid(), since it is
814
# possible that the client timed out while establishing
815
# the GnuTLS session.
816
if not client.still_valid():
817
ipc.write(u"INVALID %s\n" % client.name)
818
session.bye()
819
return
820
ipc.write(u"SENDING %s\n" % client.name)
821
sent_size = 0
822
while sent_size < len(client.secret):
823
sent = session.send(client.secret[sent_size:])
824
logger.debug(u"Sent: %d, remaining: %d",
825
sent, len(client.secret)
826
- (sent_size + sent))
827
sent_size += sent
828
session.bye()
829
830
@staticmethod
831
def peer_certificate(session):
832
"Return the peer's OpenPGP certificate as a bytestring"
833
# If not an OpenPGP certificate...
834
if (gnutls.library.functions
835
.gnutls_certificate_type_get(session._c_object)
836
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
837
# ...do the normal thing
838
return session.peer_certificate
839
list_size = ctypes.c_uint(1)
840
cert_list = (gnutls.library.functions
841
.gnutls_certificate_get_peers
842
(session._c_object, ctypes.byref(list_size)))
843
if not bool(cert_list) and list_size.value != 0:
844
raise gnutls.errors.GNUTLSError(u"error getting peer"
845
u" certificate")
846
if list_size.value == 0:
847
return None
848
cert = cert_list[0]
849
return ctypes.string_at(cert.data, cert.size)
850
851
@staticmethod
852
def fingerprint(openpgp):
853
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
854
# New GnuTLS "datum" with the OpenPGP public key
855
datum = (gnutls.library.types
856
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
857
ctypes.POINTER
858
(ctypes.c_ubyte)),
859
ctypes.c_uint(len(openpgp))))
860
# New empty GnuTLS certificate
861
crt = gnutls.library.types.gnutls_openpgp_crt_t()
862
(gnutls.library.functions
863
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
864
# Import the OpenPGP public key into the certificate
865
(gnutls.library.functions
866
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
867
gnutls.library.constants
868
.GNUTLS_OPENPGP_FMT_RAW))
869
# Verify the self signature in the key
870
crtverify = ctypes.c_uint()
871
(gnutls.library.functions
872
.gnutls_openpgp_crt_verify_self(crt, 0,
873
ctypes.byref(crtverify)))
874
if crtverify.value != 0:
875
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
876
raise (gnutls.errors.CertificateSecurityError
877
(u"Verify failed"))
878
# New buffer for the fingerprint
879
buf = ctypes.create_string_buffer(20)
880
buf_len = ctypes.c_size_t()
881
# Get the fingerprint from the certificate into the buffer
882
(gnutls.library.functions
883
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
884
ctypes.byref(buf_len)))
885
# Deinit the certificate
886
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
887
# Convert the buffer to a Python bytestring
888
fpr = ctypes.string_at(buf, buf_len.value)
889
# Convert the bytestring to hexadecimal notation
890
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
891
return hex_fpr
892
893
894
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
895
"""Like socketserver.ForkingMixIn, but also pass a pipe.
896
897
Assumes a gobject.MainLoop event loop.
898
"""
899
def process_request(self, request, client_address):
900
"""Overrides and wraps the original process_request().
901
902
This function creates a new pipe in self.pipe
903
"""
904
self.pipe = os.pipe()
905
super(ForkingMixInWithPipe,
906
self).process_request(request, client_address)
907
os.close(self.pipe[1]) # close write end
908
# Call "handle_ipc" for both data and EOF events
909
gobject.io_add_watch(self.pipe[0],
910
gobject.IO_IN | gobject.IO_HUP,
911
self.handle_ipc)
912
def handle_ipc(source, condition):
913
"""Dummy function; override as necessary"""
914
os.close(source)
915
return False
916
917
918
class IPv6_TCPServer(ForkingMixInWithPipe,
919
socketserver.TCPServer, object):
920
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
921
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.
922
517
Attributes:
923
enabled: Boolean; whether this server is activated yet
924
interface: None or a network interface name (string)
925
use_ipv6: Boolean; to use IPv6 or not
926
----
927
clients: set of Client objects
928
gnutls_priority GnuTLS priority string
929
use_dbus: Boolean; to emit D-Bus signals or not
518
settings: Server settings
519
clients: Set() of Client objects
930
520
"""
931
def __init__(self, server_address, RequestHandlerClass,
932
interface=None, use_ipv6=True, clients=None,
933
gnutls_priority=None, use_dbus=True):
934
self.enabled = False
935
self.interface = interface
936
if use_ipv6:
937
self.address_family = socket.AF_INET6
938
self.clients = clients
939
self.use_dbus = use_dbus
940
self.gnutls_priority = gnutls_priority
941
socketserver.TCPServer.__init__(self, server_address,
942
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)
943
530
def server_bind(self):
944
531
"""This overrides the normal server_bind() function
945
532
to bind to an interface if one was specified, and also NOT to
946
533
bind to an address or port if they were not specified."""
947
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)
948
537
try:
949
538
self.socket.setsockopt(socket.SOL_SOCKET,
950
539
SO_BINDTODEVICE,
951
str(self.interface + u'\0'))
540
self.settings["interface"])
952
541
except socket.error, error:
953
542
if error[0] == errno.EPERM:
954
543
logger.error(u"No permission to"
955
544
u" bind to interface %s",
956
self.interface)
545
self.settings["interface"])
957
546
else:
958
raise
547
raise error
959
548
# Only bind(2) the socket if we really need to.
960
549
if self.server_address[0] or self.server_address[1]:
961
550
if not self.server_address[0]:
962
if self.address_family == socket.AF_INET6:
963
any_address = u"::" # in6addr_any
964
else:
965
any_address = socket.INADDR_ANY
966
self.server_address = (any_address,
551
in6addr_any = "::"
552
self.server_address = (in6addr_any,
967
553
self.server_address[1])
968
554
elif not self.server_address[1]:
969
555
self.server_address = (self.server_address[0],
970
556
0)
971
# if self.interface:
557
# if self.settings["interface"]:
972
558
# self.server_address = (self.server_address[0],
973
559
# 0, # port
974
560
# 0, # flowinfo
975
561
# if_nametoindex
976
# (self.interface))
977
return socketserver.TCPServer.server_bind(self)
978
def server_activate(self):
979
if self.enabled:
980
return socketserver.TCPServer.server_activate(self)
981
def enable(self):
982
self.enabled = True
983
def handle_ipc(self, source, condition, file_objects={}):
984
condition_names = {
985
gobject.IO_IN: u"IN", # There is data to read.
986
gobject.IO_OUT: u"OUT", # Data can be written (without
987
# blocking).
988
gobject.IO_PRI: u"PRI", # There is urgent data to read.
989
gobject.IO_ERR: u"ERR", # Error condition.
990
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
991
# broken, usually for pipes and
992
# sockets).
993
}
994
conditions_string = ' | '.join(name
995
for cond, name in
996
condition_names.iteritems()
997
if cond & condition)
998
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
999
conditions_string)
1000
1001
# Turn the pipe file descriptor into a Python file object
1002
if source not in file_objects:
1003
file_objects[source] = os.fdopen(source, u"r", 1)
1004
1005
# Read a line from the file object
1006
cmdline = file_objects[source].readline()
1007
if not cmdline: # Empty line means end of file
1008
# close the IPC pipe
1009
file_objects[source].close()
1010
del file_objects[source]
1011
1012
# Stop calling this function
1013
return False
1014
1015
logger.debug(u"IPC command: %r", cmdline)
1016
1017
# Parse and act on command
1018
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1019
1020
if cmd == u"NOTFOUND":
1021
logger.warning(u"Client not found for fingerprint: %s",
1022
args)
1023
if self.use_dbus:
1024
# Emit D-Bus signal
1025
mandos_dbus_service.ClientNotFound(args)
1026
elif cmd == u"INVALID":
1027
for client in self.clients:
1028
if client.name == args:
1029
logger.warning(u"Client %s is invalid", args)
1030
if self.use_dbus:
1031
# Emit D-Bus signal
1032
client.Rejected()
1033
break
1034
else:
1035
logger.error(u"Unknown client %s is invalid", args)
1036
elif cmd == u"SENDING":
1037
for client in self.clients:
1038
if client.name == args:
1039
logger.info(u"Sending secret to %s", client.name)
1040
client.checked_ok()
1041
if self.use_dbus:
1042
# Emit D-Bus signal
1043
client.ReceivedSecret()
1044
break
1045
else:
1046
logger.error(u"Sending secret to unknown client %s",
1047
args)
1048
else:
1049
logger.error(u"Unknown IPC command: %r", cmdline)
1050
1051
# Keep calling this function
1052
return True
562
# (self.settings
563
# ["interface"]))
564
return super(type(self), self).server_bind()
1053
565
1054
566
1055
567
def string_to_delta(interval):
1056
568
"""Parse a string and return a datetime.timedelta
1057
1058
>>> string_to_delta(u'7d')
569
570
>>> string_to_delta('7d')
1059
571
datetime.timedelta(7)
1060
>>> string_to_delta(u'60s')
572
>>> string_to_delta('60s')
1061
573
datetime.timedelta(0, 60)
1062
>>> string_to_delta(u'60m')
574
>>> string_to_delta('60m')
1063
575
datetime.timedelta(0, 3600)
1064
>>> string_to_delta(u'24h')
576
>>> string_to_delta('24h')
1065
577
datetime.timedelta(1)
1066
578
>>> string_to_delta(u'1w')
1067
579
datetime.timedelta(7)
1068
>>> string_to_delta(u'5m 30s')
580
>>> string_to_delta('5m 30s')
1069
581
datetime.timedelta(0, 330)
1070
582
"""
1071
583
timevalue = datetime.timedelta(0)
1072
584
for s in interval.split():
1073
585
try:
1074
suffix = unicode(s[-1])
1075
value = int(s[:-1])
586
suffix=unicode(s[-1])
587
value=int(s[:-1])
1076
588
if suffix == u"d":
1077
589
delta = datetime.timedelta(value)
1078
590
elif suffix == u"s":
1091
603
return timevalue
1092
604
1093
605
606
def server_state_changed(state):
607
"""Derived from the Avahi example code"""
608
if state == avahi.SERVER_COLLISION:
609
logger.error(u"Zeroconf server name collision")
610
service.remove()
611
elif state == avahi.SERVER_RUNNING:
612
service.add()
613
614
615
def entry_group_state_changed(state, error):
616
"""Derived from the Avahi example code"""
617
logger.debug(u"Avahi state change: %i", state)
618
619
if state == avahi.ENTRY_GROUP_ESTABLISHED:
620
logger.debug(u"Zeroconf service established.")
621
elif state == avahi.ENTRY_GROUP_COLLISION:
622
logger.warning(u"Zeroconf service name collision.")
623
service.rename()
624
elif state == avahi.ENTRY_GROUP_FAILURE:
625
logger.critical(u"Avahi: Error in group state changed %s",
626
unicode(error))
627
raise AvahiGroupError("State changed: %s", str(error))
628
1094
629
def if_nametoindex(interface):
1095
"""Call the C function if_nametoindex(), or equivalent
1096
1097
Note: This function cannot accept a unicode string."""
630
"""Call the C function if_nametoindex(), or equivalent"""
1098
631
global if_nametoindex
1099
632
try:
1100
if_nametoindex = (ctypes.cdll.LoadLibrary
1101
(ctypes.util.find_library(u"c"))
1102
.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
1103
637
except (OSError, AttributeError):
1104
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
1105
642
def if_nametoindex(interface):
1106
643
"Get an interface index the hard way, i.e. using fcntl()"
1107
644
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1108
with closing(socket.socket()) as s:
1109
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1110
struct.pack(str(u"16s16x"),
1111
interface))
1112
interface_index = struct.unpack(str(u"I"),
1113
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]
1114
650
return interface_index
1115
651
return if_nametoindex(interface)
1116
652
1117
653
1118
654
def daemon(nochdir = False, noclose = False):
1119
655
"""See daemon(3). Standard BSD Unix function.
1120
1121
656
This should really exist as os.daemon, but it doesn't (yet)."""
1122
657
if os.fork():
1123
658
sys.exit()
1124
659
os.setsid()
1125
660
if not nochdir:
1126
os.chdir(u"/")
661
os.chdir("/")
1127
662
if os.fork():
1128
663
sys.exit()
1129
664
if not noclose:
1131
666
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1132
667
if not stat.S_ISCHR(os.fstat(null).st_mode):
1133
668
raise OSError(errno.ENODEV,
1134
u"/dev/null not a character device")
669
"/dev/null not a character device")
1135
670
os.dup2(null, sys.stdin.fileno())
1136
671
os.dup2(null, sys.stdout.fileno())
1137
672
os.dup2(null, sys.stderr.fileno())
1140
675
1141
676
1142
677
def main():
1143
1144
######################################################################
1145
# Parsing of options, both command line and config file
1146
1147
parser = optparse.OptionParser(version = "%%prog %s" % version)
1148
parser.add_option("-i", u"--interface", type=u"string",
1149
metavar="IF", help=u"Bind to interface IF")
1150
parser.add_option("-a", u"--address", type=u"string",
1151
help=u"Address to listen for requests on")
1152
parser.add_option("-p", u"--port", type=u"int",
1153
help=u"Port number to receive requests on")
1154
parser.add_option("--check", action=u"store_true",
1155
help=u"Run self-test")
1156
parser.add_option("--debug", action=u"store_true",
1157
help=u"Debug mode; run in foreground and log to"
1158
u" terminal")
1159
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1160
u" priority string (see GnuTLS documentation)")
1161
parser.add_option("--servicename", type=u"string",
1162
metavar=u"NAME", help=u"Zeroconf service name")
1163
parser.add_option("--configdir", type=u"string",
1164
default=u"/etc/mandos", metavar=u"DIR",
1165
help=u"Directory to search for configuration"
1166
u" files")
1167
parser.add_option("--no-dbus", action=u"store_false",
1168
dest=u"use_dbus", help=u"Do not provide D-Bus"
1169
u" system bus interface")
1170
parser.add_option("--no-ipv6", action=u"store_false",
1171
dest=u"use_ipv6", help=u"Do not use IPv6")
1172
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()
1173
702
1174
703
if options.check:
1175
704
import doctest
1177
706
sys.exit()
1178
707
1179
708
# Default values for config file for server-global settings
1180
server_defaults = { u"interface": u"",
1181
u"address": u"",
1182
u"port": u"",
1183
u"debug": u"False",
1184
u"priority":
1185
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1186
u"servicename": u"Mandos",
1187
u"use_dbus": u"True",
1188
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",
1189
716
}
1190
717
1191
718
# Parse config file for server-global settings
1192
server_config = configparser.SafeConfigParser(server_defaults)
719
server_config = ConfigParser.SafeConfigParser(server_defaults)
1193
720
del server_defaults
1194
server_config.read(os.path.join(options.configdir,
1195
u"mandos.conf"))
721
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1196
722
# Convert the SafeConfigParser object to a dict
1197
723
server_settings = server_config.defaults()
1198
# Use the appropriate methods on the non-string config options
1199
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1200
server_settings[option] = server_config.getboolean(u"DEFAULT",
1201
option)
1202
if server_settings["port"]:
1203
server_settings["port"] = server_config.getint(u"DEFAULT",
1204
u"port")
724
# Use getboolean on the boolean config option
725
server_settings["debug"] = server_config.getboolean\
726
("DEFAULT", "debug")
1205
727
del server_config
1206
728
1207
729
# Override the settings from the config file with command line
1208
730
# options, if set.
1209
for option in (u"interface", u"address", u"port", u"debug",
1210
u"priority", u"servicename", u"configdir",
1211
u"use_dbus", u"use_ipv6"):
731
for option in ("interface", "address", "port", "debug",
732
"priority", "servicename", "configdir"):
1212
733
value = getattr(options, option)
1213
734
if value is not None:
1214
735
server_settings[option] = value
1215
736
del options
1216
# Force all strings to be unicode
1217
for option in server_settings.keys():
1218
if type(server_settings[option]) is str:
1219
server_settings[option] = unicode(server_settings[option])
1220
737
# Now we have our good server settings in "server_settings"
1221
738
1222
##################################################################
1223
1224
# For convenience
1225
debug = server_settings[u"debug"]
1226
use_dbus = server_settings[u"use_dbus"]
1227
use_ipv6 = server_settings[u"use_ipv6"]
739
debug = server_settings["debug"]
1228
740
1229
741
if not debug:
1230
742
syslogger.setLevel(logging.WARNING)
1231
743
console.setLevel(logging.WARNING)
1232
744
1233
if server_settings[u"servicename"] != u"Mandos":
1234
syslogger.setFormatter(logging.Formatter
1235
(u'Mandos (%s) [%%(process)d]:'
1236
u' %%(levelname)s: %%(message)s'
1237
% 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"]))
1238
750
1239
751
# Parse config file with clients
1240
client_defaults = { u"timeout": u"1h",
1241
u"interval": u"5m",
1242
u"checker": u"fping -q -- %%(host)s",
1243
u"host": u"",
752
client_defaults = { "timeout": "1h",
753
"interval": "5m",
754
"checker": "fping -q -- %(host)s",
755
"host": "",
1244
756
}
1245
client_config = configparser.SafeConfigParser(client_defaults)
1246
client_config.read(os.path.join(server_settings[u"configdir"],
1247
u"clients.conf"))
1248
1249
global mandos_dbus_service
1250
mandos_dbus_service = None
1251
1252
clients = set()
1253
tcp_server = IPv6_TCPServer((server_settings[u"address"],
1254
server_settings[u"port"]),
1255
ClientHandler,
1256
interface=
1257
server_settings[u"interface"],
1258
use_ipv6=use_ipv6,
1259
clients=clients,
1260
gnutls_priority=
1261
server_settings[u"priority"],
1262
use_dbus=use_dbus)
1263
pidfilename = u"/var/run/mandos.pid"
1264
try:
1265
pidfile = open(pidfilename, u"w")
1266
except IOError:
1267
logger.error(u"Could not open file %r", pidfilename)
1268
1269
try:
1270
uid = pwd.getpwnam(u"_mandos").pw_uid
1271
gid = pwd.getpwnam(u"_mandos").pw_gid
1272
except KeyError:
1273
try:
1274
uid = pwd.getpwnam(u"mandos").pw_uid
1275
gid = pwd.getpwnam(u"mandos").pw_gid
1276
except KeyError:
1277
try:
1278
uid = pwd.getpwnam(u"nobody").pw_uid
1279
gid = pwd.getpwnam(u"nobody").pw_gid
1280
except KeyError:
1281
uid = 65534
1282
gid = 65534
1283
try:
1284
os.setgid(gid)
1285
os.setuid(uid)
1286
except OSError, error:
1287
if error[0] != errno.EPERM:
1288
raise error
1289
1290
# Enable all possible GnuTLS debugging
1291
if debug:
1292
# "Use a log level over 10 to enable all debugging options."
1293
# - GnuTLS manual
1294
gnutls.library.functions.gnutls_global_set_log_level(11)
1295
1296
@gnutls.library.types.gnutls_log_func
1297
def debug_gnutls(level, string):
1298
logger.debug(u"GnuTLS: %s", string[:-1])
1299
1300
(gnutls.library.functions
1301
.gnutls_global_set_log_function(debug_gnutls))
757
client_config = ConfigParser.SafeConfigParser(client_defaults)
758
client_config.read(os.path.join(server_settings["configdir"],
759
"clients.conf"))
760
761
global service
762
service = AvahiService(name = server_settings["servicename"],
763
type = "_mandos._tcp", );
764
if server_settings["interface"]:
765
service.interface = if_nametoindex\
766
(server_settings["interface"])
1302
767
1303
768
global main_loop
769
global bus
770
global server
1304
771
# From the Avahi example code
1305
772
DBusGMainLoop(set_as_default=True )
1306
773
main_loop = gobject.MainLoop()
1307
774
bus = dbus.SystemBus()
775
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
776
avahi.DBUS_PATH_SERVER),
777
avahi.DBUS_INTERFACE_SERVER)
1308
778
# End of Avahi example code
1309
if use_dbus:
1310
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1311
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1312
service = AvahiService(name = server_settings[u"servicename"],
1313
servicetype = u"_mandos._tcp",
1314
protocol = protocol, bus = bus)
1315
if server_settings["interface"]:
1316
service.interface = (if_nametoindex
1317
(str(server_settings[u"interface"])))
1318
1319
client_class = Client
1320
if use_dbus:
1321
client_class = functools.partial(ClientDBus, bus = bus)
1322
clients.update(set(
1323
client_class(name = section,
1324
config= dict(client_config.items(section)))
1325
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()))
1326
792
if not clients:
1327
logger.warning(u"No clients defined")
793
logger.critical(u"No clients defined")
794
sys.exit(1)
1328
795
1329
796
if debug:
1330
797
# Redirect stdin so all checkers get /dev/null
1338
805
# Close all input and output, do double fork, etc.
1339
806
daemon()
1340
807
808
pidfilename = "/var/run/mandos/mandos.pid"
809
pid = os.getpid()
1341
810
try:
1342
with closing(pidfile):
1343
pid = os.getpid()
1344
pidfile.write(str(pid) + "\n")
811
pidfile = open(pidfilename, "w")
812
pidfile.write(str(pid) + "\n")
813
pidfile.close()
1345
814
del pidfile
1346
except IOError:
1347
logger.error(u"Could not write to file %r with PID %d",
1348
pidfilename, pid)
1349
except NameError:
1350
# "pidfile" was never created
1351
pass
1352
del pidfilename
815
except IOError, err:
816
logger.error(u"Could not write %s file with PID %d",
817
pidfilename, os.getpid())
1353
818
1354
819
def cleanup():
1355
820
"Cleanup function; run on exit"
1356
service.cleanup()
821
global group
822
# From the Avahi example code
823
if not group is None:
824
group.Free()
825
group = None
826
# End of Avahi example code
1357
827
1358
828
while clients:
1359
829
client = clients.pop()
1360
client.disable_hook = None
1361
client.disable()
830
client.stop_hook = None
831
client.stop()
1362
832
1363
833
atexit.register(cleanup)
1364
834
1367
837
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1368
838
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1369
839
1370
if use_dbus:
1371
class MandosDBusService(dbus.service.Object):
1372
"""A D-Bus proxy object"""
1373
def __init__(self):
1374
dbus.service.Object.__init__(self, bus, u"/")
1375
_interface = u"se.bsnet.fukt.Mandos"
1376
1377
@dbus.service.signal(_interface, signature=u"oa{sv}")
1378
def ClientAdded(self, objpath, properties):
1379
"D-Bus signal"
1380
pass
1381
1382
@dbus.service.signal(_interface, signature=u"s")
1383
def ClientNotFound(self, fingerprint):
1384
"D-Bus signal"
1385
pass
1386
1387
@dbus.service.signal(_interface, signature=u"os")
1388
def ClientRemoved(self, objpath, name):
1389
"D-Bus signal"
1390
pass
1391
1392
@dbus.service.method(_interface, out_signature=u"ao")
1393
def GetAllClients(self):
1394
"D-Bus method"
1395
return dbus.Array(c.dbus_object_path for c in clients)
1396
1397
@dbus.service.method(_interface,
1398
out_signature=u"a{oa{sv}}")
1399
def GetAllClientsWithProperties(self):
1400
"D-Bus method"
1401
return dbus.Dictionary(
1402
((c.dbus_object_path, c.GetAllProperties())
1403
for c in clients),
1404
signature=u"oa{sv}")
1405
1406
@dbus.service.method(_interface, in_signature=u"o")
1407
def RemoveClient(self, object_path):
1408
"D-Bus method"
1409
for c in clients:
1410
if c.dbus_object_path == object_path:
1411
clients.remove(c)
1412
c.remove_from_connection()
1413
# Don't signal anything except ClientRemoved
1414
c.disable(signal=False)
1415
# Emit D-Bus signal
1416
self.ClientRemoved(object_path, c.name)
1417
return
1418
raise KeyError
1419
1420
del _interface
1421
1422
mandos_dbus_service = MandosDBusService()
1423
1424
840
for client in clients:
1425
if use_dbus:
1426
# Emit D-Bus signal
1427
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1428
client.GetAllProperties())
1429
client.enable()
1430
1431
tcp_server.enable()
1432
tcp_server.server_activate()
1433
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)
1434
848
# Find out what port we got
1435
849
service.port = tcp_server.socket.getsockname()[1]
1436
if use_ipv6:
1437
logger.info(u"Now listening on address %r, port %d,"
1438
" flowinfo %d, scope_id %d"
1439
% tcp_server.socket.getsockname())
1440
else: # IPv4
1441
logger.info(u"Now listening on address %r, port %d"
1442
% 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())
1443
852
1444
853
#service.interface = tcp_server.socket.getsockname()[3]
1445
854
1446
855
try:
1447
856
# From the Avahi example code
857
server.connect_to_signal("StateChanged", server_state_changed)
1448
858
try:
1449
service.activate()
859
server_state_changed(server.GetState())
1450
860
except dbus.exceptions.DBusException, error:
1451
861
logger.critical(u"DBusException: %s", error)
1452
862
sys.exit(1)
1454
864
1455
865
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1456
866
lambda *args, **kwargs:
1457
(tcp_server.handle_request
1458
(*args[2:], **kwargs) or True))
867
tcp_server.handle_request\
868
(*args[2:], **kwargs) or True)
1459
869
1460
870
logger.debug(u"Starting main loop")
871
main_loop_started = True
1461
872
main_loop.run()
1462
873
except AvahiError, error:
1463
logger.critical(u"AvahiError: %s", error)
874
logger.critical(u"AvahiError: %s" + unicode(error))
1464
875
sys.exit(1)
1465
876
except KeyboardInterrupt:
1466
877
if debug:
1467
print >> sys.stderr
1468
logger.debug(u"Server received KeyboardInterrupt")
1469
logger.debug(u"Server exiting")
878
print
1470
879
1471
880
if __name__ == '__main__':
1472
881
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0