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- Committer: Teddy Hogeborn
- Date: 2008-08-31 16:04:47 UTC
- mfrom: (24.1.77 mandos)
- Revision ID: teddy@fukt.bsnet.se-20080831160447-2xte5k90onspphki
Merge.
- files added:
- plugins.d/usplash
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- .bzrignore
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
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12
#
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13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
#
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
31
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# Contact the authors at <mandos@fukt.bsnet.se>.
32
31
#
33
32
34
from __future__ import division, with_statement, absolute_import
33
from __future__ import division
35
34
36
import SocketServer as socketserver
35
import SocketServer
37
36
import socket
38
import optparse
37
import select
38
from optparse import OptionParser
39
39
import datetime
40
40
import errno
41
41
import gnutls.crypto
44
44
import gnutls.library.functions
45
45
import gnutls.library.constants
46
46
import gnutls.library.types
47
import ConfigParser as configparser
47
import ConfigParser
48
48
import sys
49
49
import re
50
50
import os
51
51
import signal
52
from sets import Set
52
53
import subprocess
53
54
import atexit
54
55
import stat
55
56
import logging
56
57
import logging.handlers
57
import pwd
58
from contextlib import closing
59
import struct
60
import fcntl
61
import functools
62
58
63
59
import dbus
64
import dbus.service
65
60
import gobject
66
61
import avahi
67
62
from dbus.mainloop.glib import DBusGMainLoop
68
63
import ctypes
69
import ctypes.util
70
71
try:
72
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
73
except AttributeError:
74
try:
75
from IN import SO_BINDTODEVICE
76
except ImportError:
77
SO_BINDTODEVICE = None
78
79
80
version = "1.0.8"
81
82
logger = logging.Logger(u'mandos')
83
syslogger = (logging.handlers.SysLogHandler
84
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
85
address = "/dev/log"))
86
syslogger.setFormatter(logging.Formatter
87
(u'Mandos [%(process)d]: %(levelname)s:'
88
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'))
89
73
logger.addHandler(syslogger)
90
74
91
75
console = logging.StreamHandler()
92
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
93
u' %(levelname)s:'
94
u' %(message)s'))
76
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
77
' %(message)s'))
95
78
logger.addHandler(console)
96
79
97
80
class AvahiError(Exception):
98
def __init__(self, value, *args, **kwargs):
81
def __init__(self, value):
99
82
self.value = value
100
super(AvahiError, self).__init__(value, *args, **kwargs)
101
def __unicode__(self):
102
return unicode(repr(self.value))
83
def __str__(self):
84
return repr(self.value)
103
85
104
86
class AvahiServiceError(AvahiError):
105
87
pass
110
92
111
93
class AvahiService(object):
112
94
"""An Avahi (Zeroconf) service.
113
114
95
Attributes:
115
96
interface: integer; avahi.IF_UNSPEC or an interface index.
116
97
Used to optionally bind to the specified interface.
117
name: string; Example: u'Mandos'
118
type: string; Example: u'_mandos._tcp'.
98
name: string; Example: 'Mandos'
99
type: string; Example: '_mandos._tcp'.
119
100
See <http://www.dns-sd.org/ServiceTypes.html>
120
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port: integer; what port to announce
121
102
TXT: list of strings; TXT record for the service
124
105
max_renames: integer; maximum number of renames
125
106
rename_count: integer; counter so we only rename after collisions
126
107
a sensible number of times
127
group: D-Bus Entry Group
128
server: D-Bus Server
129
bus: dbus.SystemBus()
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
482
bus: dbus.SystemBus()
483
"""
484
# dbus.service.Object doesn't use super(), so we can't either.
485
486
def __init__(self, bus = None, *args, **kwargs):
487
self.bus = bus
488
Client.__init__(self, *args, **kwargs)
489
# Only now, when this client is initialized, can it show up on
490
# the D-Bus
491
self.dbus_object_path = (dbus.ObjectPath
492
(u"/clients/"
493
+ self.name.replace(u".", u"_")))
494
dbus.service.Object.__init__(self, self.bus,
495
self.dbus_object_path)
496
497
@staticmethod
498
def _datetime_to_dbus(dt, variant_level=0):
499
"""Convert a UTC datetime.datetime() to a D-Bus type."""
500
return dbus.String(dt.isoformat(),
501
variant_level=variant_level)
502
503
def enable(self):
504
oldstate = getattr(self, u"enabled", False)
505
r = Client.enable(self)
506
if oldstate != self.enabled:
507
# Emit D-Bus signals
508
self.PropertyChanged(dbus.String(u"enabled"),
509
dbus.Boolean(True, variant_level=1))
510
self.PropertyChanged(
511
dbus.String(u"last_enabled"),
512
self._datetime_to_dbus(self.last_enabled,
513
variant_level=1))
514
return r
515
516
def disable(self, signal = True):
517
oldstate = getattr(self, u"enabled", False)
518
r = Client.disable(self)
519
if signal and oldstate != self.enabled:
520
# Emit D-Bus signal
521
self.PropertyChanged(dbus.String(u"enabled"),
522
dbus.Boolean(False, variant_level=1))
523
return r
524
525
def __del__(self, *args, **kwargs):
526
try:
527
self.remove_from_connection()
528
except LookupError:
529
pass
530
if hasattr(dbus.service.Object, u"__del__"):
531
dbus.service.Object.__del__(self, *args, **kwargs)
532
Client.__del__(self, *args, **kwargs)
533
534
def checker_callback(self, pid, condition, command,
535
*args, **kwargs):
536
self.checker_callback_tag = None
537
self.checker = None
538
# Emit D-Bus signal
539
self.PropertyChanged(dbus.String(u"checker_running"),
540
dbus.Boolean(False, variant_level=1))
541
if os.WIFEXITED(condition):
542
exitstatus = os.WEXITSTATUS(condition)
543
# Emit D-Bus signal
544
self.CheckerCompleted(dbus.Int16(exitstatus),
545
dbus.Int64(condition),
546
dbus.String(command))
547
else:
548
# Emit D-Bus signal
549
self.CheckerCompleted(dbus.Int16(-1),
550
dbus.Int64(condition),
551
dbus.String(command))
552
553
return Client.checker_callback(self, pid, condition, command,
554
*args, **kwargs)
555
556
def checked_ok(self, *args, **kwargs):
557
r = Client.checked_ok(self, *args, **kwargs)
558
# Emit D-Bus signal
559
self.PropertyChanged(
560
dbus.String(u"last_checked_ok"),
561
(self._datetime_to_dbus(self.last_checked_ok,
562
variant_level=1)))
563
return r
564
565
def start_checker(self, *args, **kwargs):
566
old_checker = self.checker
567
if self.checker is not None:
568
old_checker_pid = self.checker.pid
569
else:
570
old_checker_pid = None
571
r = Client.start_checker(self, *args, **kwargs)
572
# Only if new checker process was started
573
if (self.checker is not None
574
and old_checker_pid != self.checker.pid):
575
# Emit D-Bus signal
576
self.CheckerStarted(self.current_checker_command)
577
self.PropertyChanged(
578
dbus.String(u"checker_running"),
579
dbus.Boolean(True, variant_level=1))
580
return r
581
582
def stop_checker(self, *args, **kwargs):
583
old_checker = getattr(self, u"checker", None)
584
r = Client.stop_checker(self, *args, **kwargs)
585
if (old_checker is not None
586
and getattr(self, u"checker", None) is None):
587
self.PropertyChanged(dbus.String(u"checker_running"),
588
dbus.Boolean(False, variant_level=1))
589
return r
590
591
## D-Bus methods & signals
592
_interface = u"se.bsnet.fukt.Mandos.Client"
593
594
# CheckedOK - method
595
@dbus.service.method(_interface)
596
def CheckedOK(self):
597
return self.checked_ok()
598
599
# CheckerCompleted - signal
600
@dbus.service.signal(_interface, signature=u"nxs")
601
def CheckerCompleted(self, exitcode, waitstatus, command):
602
"D-Bus signal"
603
pass
604
605
# CheckerStarted - signal
606
@dbus.service.signal(_interface, signature=u"s")
607
def CheckerStarted(self, command):
608
"D-Bus signal"
609
pass
610
611
# GetAllProperties - method
612
@dbus.service.method(_interface, out_signature=u"a{sv}")
613
def GetAllProperties(self):
614
"D-Bus method"
615
return dbus.Dictionary({
616
dbus.String(u"name"):
617
dbus.String(self.name, variant_level=1),
618
dbus.String(u"fingerprint"):
619
dbus.String(self.fingerprint, variant_level=1),
620
dbus.String(u"host"):
621
dbus.String(self.host, variant_level=1),
622
dbus.String(u"created"):
623
self._datetime_to_dbus(self.created,
624
variant_level=1),
625
dbus.String(u"last_enabled"):
626
(self._datetime_to_dbus(self.last_enabled,
627
variant_level=1)
628
if self.last_enabled is not None
629
else dbus.Boolean(False, variant_level=1)),
630
dbus.String(u"enabled"):
631
dbus.Boolean(self.enabled, variant_level=1),
632
dbus.String(u"last_checked_ok"):
633
(self._datetime_to_dbus(self.last_checked_ok,
634
variant_level=1)
635
if self.last_checked_ok is not None
636
else dbus.Boolean (False, variant_level=1)),
637
dbus.String(u"timeout"):
638
dbus.UInt64(self.timeout_milliseconds(),
639
variant_level=1),
640
dbus.String(u"interval"):
641
dbus.UInt64(self.interval_milliseconds(),
642
variant_level=1),
643
dbus.String(u"checker"):
644
dbus.String(self.checker_command,
645
variant_level=1),
646
dbus.String(u"checker_running"):
647
dbus.Boolean(self.checker is not None,
648
variant_level=1),
649
dbus.String(u"object_path"):
650
dbus.ObjectPath(self.dbus_object_path,
651
variant_level=1)
652
}, signature=u"sv")
653
654
# IsStillValid - method
655
@dbus.service.method(_interface, out_signature=u"b")
656
def IsStillValid(self):
657
return self.still_valid()
658
659
# PropertyChanged - signal
660
@dbus.service.signal(_interface, signature=u"sv")
661
def PropertyChanged(self, property, value):
662
"D-Bus signal"
663
pass
664
665
# ReceivedSecret - signal
666
@dbus.service.signal(_interface)
667
def ReceivedSecret(self):
668
"D-Bus signal"
669
pass
670
671
# Rejected - signal
672
@dbus.service.signal(_interface)
673
def Rejected(self):
674
"D-Bus signal"
675
pass
676
677
# SetChecker - method
678
@dbus.service.method(_interface, in_signature=u"s")
679
def SetChecker(self, checker):
680
"D-Bus setter method"
681
self.checker_command = checker
682
# Emit D-Bus signal
683
self.PropertyChanged(dbus.String(u"checker"),
684
dbus.String(self.checker_command,
685
variant_level=1))
686
687
# SetHost - method
688
@dbus.service.method(_interface, in_signature=u"s")
689
def SetHost(self, host):
690
"D-Bus setter method"
691
self.host = host
692
# Emit D-Bus signal
693
self.PropertyChanged(dbus.String(u"host"),
694
dbus.String(self.host, variant_level=1))
695
696
# SetInterval - method
697
@dbus.service.method(_interface, in_signature=u"t")
698
def SetInterval(self, milliseconds):
699
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
700
# Emit D-Bus signal
701
self.PropertyChanged(dbus.String(u"interval"),
702
(dbus.UInt64(self.interval_milliseconds(),
703
variant_level=1)))
704
705
# SetSecret - method
706
@dbus.service.method(_interface, in_signature=u"ay",
707
byte_arrays=True)
708
def SetSecret(self, secret):
709
"D-Bus setter method"
710
self.secret = str(secret)
711
712
# SetTimeout - method
713
@dbus.service.method(_interface, in_signature=u"t")
714
def SetTimeout(self, milliseconds):
715
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
716
# Emit D-Bus signal
717
self.PropertyChanged(dbus.String(u"timeout"),
718
(dbus.UInt64(self.timeout_milliseconds(),
719
variant_level=1)))
720
721
# Enable - method
722
@dbus.service.method(_interface)
723
def Enable(self):
724
"D-Bus method"
725
self.enable()
726
727
# StartChecker - method
728
@dbus.service.method(_interface)
729
def StartChecker(self):
730
"D-Bus method"
731
self.start_checker()
732
733
# Disable - method
734
@dbus.service.method(_interface)
735
def Disable(self):
736
"D-Bus method"
737
self.disable()
738
739
# StopChecker - method
740
@dbus.service.method(_interface)
741
def StopChecker(self):
742
self.stop_checker()
743
744
del _interface
745
746
747
class ClientHandler(socketserver.BaseRequestHandler, object):
748
"""A class to handle client connections.
749
750
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.
751
441
Note: This will run in its own forked process."""
752
442
753
443
def handle(self):
754
444
logger.info(u"TCP connection from: %s",
755
unicode(self.client_address))
756
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
757
# Open IPC pipe to parent process
758
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
759
session = (gnutls.connection
760
.ClientSession(self.request,
761
gnutls.connection
762
.X509Credentials()))
763
764
line = self.request.makefile().readline()
765
logger.debug(u"Protocol version: %r", line)
766
try:
767
if int(line.strip().split()[0]) > 1:
768
raise RuntimeError
769
except (ValueError, IndexError, RuntimeError), error:
770
logger.error(u"Unknown protocol version: %s", error)
771
return
772
773
# Note: gnutls.connection.X509Credentials is really a
774
# generic GnuTLS certificate credentials object so long as
775
# no X.509 keys are added to it. Therefore, we can use it
776
# here despite using OpenPGP certificates.
777
778
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
779
# u"+AES-256-CBC", u"+SHA1",
780
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
781
# u"+DHE-DSS"))
782
# Use a fallback default, since this MUST be set.
783
priority = self.server.gnutls_priority
784
if priority is None:
785
priority = u"NORMAL"
786
(gnutls.library.functions
787
.gnutls_priority_set_direct(session._c_object,
788
priority, None))
789
790
try:
791
session.handshake()
792
except gnutls.errors.GNUTLSError, error:
793
logger.warning(u"Handshake failed: %s", error)
794
# Do not run session.bye() here: the session is not
795
# established. Just abandon the request.
796
return
797
logger.debug(u"Handshake succeeded")
798
try:
799
fpr = self.fingerprint(self.peer_certificate(session))
800
except (TypeError, gnutls.errors.GNUTLSError), error:
801
logger.warning(u"Bad certificate: %s", error)
802
session.bye()
803
return
804
logger.debug(u"Fingerprint: %s", fpr)
805
806
for c in self.server.clients:
807
if c.fingerprint == fpr:
808
client = c
809
break
810
else:
811
ipc.write(u"NOTFOUND %s\n" % fpr)
812
session.bye()
813
return
814
# Have to check if client.still_valid(), since it is
815
# possible that the client timed out while establishing
816
# the GnuTLS session.
817
if not client.still_valid():
818
ipc.write(u"INVALID %s\n" % client.name)
819
session.bye()
820
return
821
ipc.write(u"SENDING %s\n" % client.name)
822
sent_size = 0
823
while sent_size < len(client.secret):
824
sent = session.send(client.secret[sent_size:])
825
logger.debug(u"Sent: %d, remaining: %d",
826
sent, len(client.secret)
827
- (sent_size + sent))
828
sent_size += sent
829
session.bye()
830
831
@staticmethod
832
def peer_certificate(session):
833
"Return the peer's OpenPGP certificate as a bytestring"
834
# If not an OpenPGP certificate...
835
if (gnutls.library.functions
836
.gnutls_certificate_type_get(session._c_object)
837
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
838
# ...do the normal thing
839
return session.peer_certificate
840
list_size = ctypes.c_uint(1)
841
cert_list = (gnutls.library.functions
842
.gnutls_certificate_get_peers
843
(session._c_object, ctypes.byref(list_size)))
844
if not bool(cert_list) and list_size.value != 0:
845
raise gnutls.errors.GNUTLSError(u"error getting peer"
846
u" certificate")
847
if list_size.value == 0:
848
return None
849
cert = cert_list[0]
850
return ctypes.string_at(cert.data, cert.size)
851
852
@staticmethod
853
def fingerprint(openpgp):
854
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
855
# New GnuTLS "datum" with the OpenPGP public key
856
datum = (gnutls.library.types
857
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
858
ctypes.POINTER
859
(ctypes.c_ubyte)),
860
ctypes.c_uint(len(openpgp))))
861
# New empty GnuTLS certificate
862
crt = gnutls.library.types.gnutls_openpgp_crt_t()
863
(gnutls.library.functions
864
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
865
# Import the OpenPGP public key into the certificate
866
(gnutls.library.functions
867
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
868
gnutls.library.constants
869
.GNUTLS_OPENPGP_FMT_RAW))
870
# Verify the self signature in the key
871
crtverify = ctypes.c_uint()
872
(gnutls.library.functions
873
.gnutls_openpgp_crt_verify_self(crt, 0,
874
ctypes.byref(crtverify)))
875
if crtverify.value != 0:
876
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
877
raise (gnutls.errors.CertificateSecurityError
878
(u"Verify failed"))
879
# New buffer for the fingerprint
880
buf = ctypes.create_string_buffer(20)
881
buf_len = ctypes.c_size_t()
882
# Get the fingerprint from the certificate into the buffer
883
(gnutls.library.functions
884
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
885
ctypes.byref(buf_len)))
886
# Deinit the certificate
887
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
888
# Convert the buffer to a Python bytestring
889
fpr = ctypes.string_at(buf, buf_len.value)
890
# Convert the bytestring to hexadecimal notation
891
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
892
return hex_fpr
893
894
895
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
896
"""Like socketserver.ForkingMixIn, but also pass a pipe.
897
898
Assumes a gobject.MainLoop event loop.
899
"""
900
def process_request(self, request, client_address):
901
"""Overrides and wraps the original process_request().
902
903
This function creates a new pipe in self.pipe
904
"""
905
self.pipe = os.pipe()
906
super(ForkingMixInWithPipe,
907
self).process_request(request, client_address)
908
os.close(self.pipe[1]) # close write end
909
# Call "handle_ipc" for both data and EOF events
910
gobject.io_add_watch(self.pipe[0],
911
gobject.IO_IN | gobject.IO_HUP,
912
self.handle_ipc)
913
def handle_ipc(source, condition):
914
"""Dummy function; override as necessary"""
915
os.close(source)
916
return False
917
918
919
class IPv6_TCPServer(ForkingMixInWithPipe,
920
socketserver.TCPServer, object):
921
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
922
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.
923
517
Attributes:
924
enabled: Boolean; whether this server is activated yet
925
interface: None or a network interface name (string)
926
use_ipv6: Boolean; to use IPv6 or not
927
----
928
clients: set of Client objects
929
gnutls_priority GnuTLS priority string
930
use_dbus: Boolean; to emit D-Bus signals or not
518
settings: Server settings
519
clients: Set() of Client objects
931
520
"""
932
def __init__(self, server_address, RequestHandlerClass,
933
interface=None, use_ipv6=True, clients=None,
934
gnutls_priority=None, use_dbus=True):
935
self.enabled = False
936
self.interface = interface
937
if use_ipv6:
938
self.address_family = socket.AF_INET6
939
self.clients = clients
940
self.use_dbus = use_dbus
941
self.gnutls_priority = gnutls_priority
942
socketserver.TCPServer.__init__(self, server_address,
943
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)
944
530
def server_bind(self):
945
531
"""This overrides the normal server_bind() function
946
532
to bind to an interface if one was specified, and also NOT to
947
533
bind to an address or port if they were not specified."""
948
if self.interface is not None:
949
if SO_BINDTODEVICE is None:
950
logger.error(u"SO_BINDTODEVICE does not exist;"
951
u" cannot bind to interface %s",
952
self.interface)
953
else:
954
try:
955
self.socket.setsockopt(socket.SOL_SOCKET,
956
SO_BINDTODEVICE,
957
str(self.interface
958
+ u'\0'))
959
except socket.error, error:
960
if error[0] == errno.EPERM:
961
logger.error(u"No permission to"
962
u" bind to interface %s",
963
self.interface)
964
elif error[0] == errno.ENOPROTOOPT:
965
logger.error(u"SO_BINDTODEVICE not available;"
966
u" cannot bind to interface %s",
967
self.interface)
968
else:
969
raise
534
if self.settings["interface"]:
535
# 25 is from /usr/include/asm-i486/socket.h
536
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
537
try:
538
self.socket.setsockopt(socket.SOL_SOCKET,
539
SO_BINDTODEVICE,
540
self.settings["interface"])
541
except socket.error, error:
542
if error[0] == errno.EPERM:
543
logger.error(u"No permission to"
544
u" bind to interface %s",
545
self.settings["interface"])
546
else:
547
raise error
970
548
# Only bind(2) the socket if we really need to.
971
549
if self.server_address[0] or self.server_address[1]:
972
550
if not self.server_address[0]:
973
if self.address_family == socket.AF_INET6:
974
any_address = u"::" # in6addr_any
975
else:
976
any_address = socket.INADDR_ANY
977
self.server_address = (any_address,
551
in6addr_any = "::"
552
self.server_address = (in6addr_any,
978
553
self.server_address[1])
979
554
elif not self.server_address[1]:
980
555
self.server_address = (self.server_address[0],
981
556
0)
982
# if self.interface:
557
# if self.settings["interface"]:
983
558
# self.server_address = (self.server_address[0],
984
559
# 0, # port
985
560
# 0, # flowinfo
986
561
# if_nametoindex
987
# (self.interface))
988
return socketserver.TCPServer.server_bind(self)
989
def server_activate(self):
990
if self.enabled:
991
return socketserver.TCPServer.server_activate(self)
992
def enable(self):
993
self.enabled = True
994
def handle_ipc(self, source, condition, file_objects={}):
995
condition_names = {
996
gobject.IO_IN: u"IN", # There is data to read.
997
gobject.IO_OUT: u"OUT", # Data can be written (without
998
# blocking).
999
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1000
gobject.IO_ERR: u"ERR", # Error condition.
1001
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1002
# broken, usually for pipes and
1003
# sockets).
1004
}
1005
conditions_string = ' | '.join(name
1006
for cond, name in
1007
condition_names.iteritems()
1008
if cond & condition)
1009
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1010
conditions_string)
1011
1012
# Turn the pipe file descriptor into a Python file object
1013
if source not in file_objects:
1014
file_objects[source] = os.fdopen(source, u"r", 1)
1015
1016
# Read a line from the file object
1017
cmdline = file_objects[source].readline()
1018
if not cmdline: # Empty line means end of file
1019
# close the IPC pipe
1020
file_objects[source].close()
1021
del file_objects[source]
1022
1023
# Stop calling this function
1024
return False
1025
1026
logger.debug(u"IPC command: %r", cmdline)
1027
1028
# Parse and act on command
1029
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1030
1031
if cmd == u"NOTFOUND":
1032
logger.warning(u"Client not found for fingerprint: %s",
1033
args)
1034
if self.use_dbus:
1035
# Emit D-Bus signal
1036
mandos_dbus_service.ClientNotFound(args)
1037
elif cmd == u"INVALID":
1038
for client in self.clients:
1039
if client.name == args:
1040
logger.warning(u"Client %s is invalid", args)
1041
if self.use_dbus:
1042
# Emit D-Bus signal
1043
client.Rejected()
1044
break
1045
else:
1046
logger.error(u"Unknown client %s is invalid", args)
1047
elif cmd == u"SENDING":
1048
for client in self.clients:
1049
if client.name == args:
1050
logger.info(u"Sending secret to %s", client.name)
1051
client.checked_ok()
1052
if self.use_dbus:
1053
# Emit D-Bus signal
1054
client.ReceivedSecret()
1055
break
1056
else:
1057
logger.error(u"Sending secret to unknown client %s",
1058
args)
1059
else:
1060
logger.error(u"Unknown IPC command: %r", cmdline)
1061
1062
# Keep calling this function
1063
return True
562
# (self.settings
563
# ["interface"]))
564
return super(type(self), self).server_bind()
1064
565
1065
566
1066
567
def string_to_delta(interval):
1067
568
"""Parse a string and return a datetime.timedelta
1068
1069
>>> string_to_delta(u'7d')
569
570
>>> string_to_delta('7d')
1070
571
datetime.timedelta(7)
1071
>>> string_to_delta(u'60s')
572
>>> string_to_delta('60s')
1072
573
datetime.timedelta(0, 60)
1073
>>> string_to_delta(u'60m')
574
>>> string_to_delta('60m')
1074
575
datetime.timedelta(0, 3600)
1075
>>> string_to_delta(u'24h')
576
>>> string_to_delta('24h')
1076
577
datetime.timedelta(1)
1077
578
>>> string_to_delta(u'1w')
1078
579
datetime.timedelta(7)
1079
>>> string_to_delta(u'5m 30s')
580
>>> string_to_delta('5m 30s')
1080
581
datetime.timedelta(0, 330)
1081
582
"""
1082
583
timevalue = datetime.timedelta(0)
1083
584
for s in interval.split():
1084
585
try:
1085
suffix = unicode(s[-1])
1086
value = int(s[:-1])
586
suffix=unicode(s[-1])
587
value=int(s[:-1])
1087
588
if suffix == u"d":
1088
589
delta = datetime.timedelta(value)
1089
590
elif suffix == u"s":
1102
603
return timevalue
1103
604
1104
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
1105
629
def if_nametoindex(interface):
1106
"""Call the C function if_nametoindex(), or equivalent
1107
1108
Note: This function cannot accept a unicode string."""
630
"""Call the C function if_nametoindex(), or equivalent"""
1109
631
global if_nametoindex
1110
632
try:
1111
if_nametoindex = (ctypes.cdll.LoadLibrary
1112
(ctypes.util.find_library(u"c"))
1113
.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
1114
637
except (OSError, AttributeError):
1115
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
1116
642
def if_nametoindex(interface):
1117
643
"Get an interface index the hard way, i.e. using fcntl()"
1118
644
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1119
with closing(socket.socket()) as s:
1120
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1121
struct.pack(str(u"16s16x"),
1122
interface))
1123
interface_index = struct.unpack(str(u"I"),
1124
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]
1125
650
return interface_index
1126
651
return if_nametoindex(interface)
1127
652
1128
653
1129
654
def daemon(nochdir = False, noclose = False):
1130
655
"""See daemon(3). Standard BSD Unix function.
1131
1132
656
This should really exist as os.daemon, but it doesn't (yet)."""
1133
657
if os.fork():
1134
658
sys.exit()
1135
659
os.setsid()
1136
660
if not nochdir:
1137
os.chdir(u"/")
661
os.chdir("/")
1138
662
if os.fork():
1139
663
sys.exit()
1140
664
if not noclose:
1142
666
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1143
667
if not stat.S_ISCHR(os.fstat(null).st_mode):
1144
668
raise OSError(errno.ENODEV,
1145
u"/dev/null not a character device")
669
"/dev/null not a character device")
1146
670
os.dup2(null, sys.stdin.fileno())
1147
671
os.dup2(null, sys.stdout.fileno())
1148
672
os.dup2(null, sys.stderr.fileno())
1151
675
1152
676
1153
677
def main():
1154
1155
######################################################################
1156
# Parsing of options, both command line and config file
1157
1158
parser = optparse.OptionParser(version = "%%prog %s" % version)
1159
parser.add_option("-i", u"--interface", type=u"string",
1160
metavar="IF", help=u"Bind to interface IF")
1161
parser.add_option("-a", u"--address", type=u"string",
1162
help=u"Address to listen for requests on")
1163
parser.add_option("-p", u"--port", type=u"int",
1164
help=u"Port number to receive requests on")
1165
parser.add_option("--check", action=u"store_true",
1166
help=u"Run self-test")
1167
parser.add_option("--debug", action=u"store_true",
1168
help=u"Debug mode; run in foreground and log to"
1169
u" terminal")
1170
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1171
u" priority string (see GnuTLS documentation)")
1172
parser.add_option("--servicename", type=u"string",
1173
metavar=u"NAME", help=u"Zeroconf service name")
1174
parser.add_option("--configdir", type=u"string",
1175
default=u"/etc/mandos", metavar=u"DIR",
1176
help=u"Directory to search for configuration"
1177
u" files")
1178
parser.add_option("--no-dbus", action=u"store_false",
1179
dest=u"use_dbus", help=u"Do not provide D-Bus"
1180
u" system bus interface")
1181
parser.add_option("--no-ipv6", action=u"store_false",
1182
dest=u"use_ipv6", help=u"Do not use IPv6")
1183
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()
1184
702
1185
703
if options.check:
1186
704
import doctest
1188
706
sys.exit()
1189
707
1190
708
# Default values for config file for server-global settings
1191
server_defaults = { u"interface": u"",
1192
u"address": u"",
1193
u"port": u"",
1194
u"debug": u"False",
1195
u"priority":
1196
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1197
u"servicename": u"Mandos",
1198
u"use_dbus": u"True",
1199
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",
1200
716
}
1201
717
1202
718
# Parse config file for server-global settings
1203
server_config = configparser.SafeConfigParser(server_defaults)
719
server_config = ConfigParser.SafeConfigParser(server_defaults)
1204
720
del server_defaults
1205
server_config.read(os.path.join(options.configdir,
1206
u"mandos.conf"))
721
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1207
722
# Convert the SafeConfigParser object to a dict
1208
723
server_settings = server_config.defaults()
1209
# Use the appropriate methods on the non-string config options
1210
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1211
server_settings[option] = server_config.getboolean(u"DEFAULT",
1212
option)
1213
if server_settings["port"]:
1214
server_settings["port"] = server_config.getint(u"DEFAULT",
1215
u"port")
724
# Use getboolean on the boolean config option
725
server_settings["debug"] = server_config.getboolean\
726
("DEFAULT", "debug")
1216
727
del server_config
1217
728
1218
729
# Override the settings from the config file with command line
1219
730
# options, if set.
1220
for option in (u"interface", u"address", u"port", u"debug",
1221
u"priority", u"servicename", u"configdir",
1222
u"use_dbus", u"use_ipv6"):
731
for option in ("interface", "address", "port", "debug",
732
"priority", "servicename", "configdir"):
1223
733
value = getattr(options, option)
1224
734
if value is not None:
1225
735
server_settings[option] = value
1226
736
del options
1227
# Force all strings to be unicode
1228
for option in server_settings.keys():
1229
if type(server_settings[option]) is str:
1230
server_settings[option] = unicode(server_settings[option])
1231
737
# Now we have our good server settings in "server_settings"
1232
738
1233
##################################################################
1234
1235
# For convenience
1236
debug = server_settings[u"debug"]
1237
use_dbus = server_settings[u"use_dbus"]
1238
use_ipv6 = server_settings[u"use_ipv6"]
739
debug = server_settings["debug"]
1239
740
1240
741
if not debug:
1241
742
syslogger.setLevel(logging.WARNING)
1242
743
console.setLevel(logging.WARNING)
1243
744
1244
if server_settings[u"servicename"] != u"Mandos":
1245
syslogger.setFormatter(logging.Formatter
1246
(u'Mandos (%s) [%%(process)d]:'
1247
u' %%(levelname)s: %%(message)s'
1248
% 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"]))
1249
750
1250
751
# Parse config file with clients
1251
client_defaults = { u"timeout": u"1h",
1252
u"interval": u"5m",
1253
u"checker": u"fping -q -- %%(host)s",
1254
u"host": u"",
752
client_defaults = { "timeout": "1h",
753
"interval": "5m",
754
"checker": "fping -q -- %(host)s",
755
"host": "",
1255
756
}
1256
client_config = configparser.SafeConfigParser(client_defaults)
1257
client_config.read(os.path.join(server_settings[u"configdir"],
1258
u"clients.conf"))
1259
1260
global mandos_dbus_service
1261
mandos_dbus_service = None
1262
1263
clients = set()
1264
tcp_server = IPv6_TCPServer((server_settings[u"address"],
1265
server_settings[u"port"]),
1266
ClientHandler,
1267
interface=
1268
server_settings[u"interface"],
1269
use_ipv6=use_ipv6,
1270
clients=clients,
1271
gnutls_priority=
1272
server_settings[u"priority"],
1273
use_dbus=use_dbus)
1274
pidfilename = u"/var/run/mandos.pid"
1275
try:
1276
pidfile = open(pidfilename, u"w")
1277
except IOError:
1278
logger.error(u"Could not open file %r", pidfilename)
1279
1280
try:
1281
uid = pwd.getpwnam(u"_mandos").pw_uid
1282
gid = pwd.getpwnam(u"_mandos").pw_gid
1283
except KeyError:
1284
try:
1285
uid = pwd.getpwnam(u"mandos").pw_uid
1286
gid = pwd.getpwnam(u"mandos").pw_gid
1287
except KeyError:
1288
try:
1289
uid = pwd.getpwnam(u"nobody").pw_uid
1290
gid = pwd.getpwnam(u"nobody").pw_gid
1291
except KeyError:
1292
uid = 65534
1293
gid = 65534
1294
try:
1295
os.setgid(gid)
1296
os.setuid(uid)
1297
except OSError, error:
1298
if error[0] != errno.EPERM:
1299
raise error
1300
1301
# Enable all possible GnuTLS debugging
1302
if debug:
1303
# "Use a log level over 10 to enable all debugging options."
1304
# - GnuTLS manual
1305
gnutls.library.functions.gnutls_global_set_log_level(11)
1306
1307
@gnutls.library.types.gnutls_log_func
1308
def debug_gnutls(level, string):
1309
logger.debug(u"GnuTLS: %s", string[:-1])
1310
1311
(gnutls.library.functions
1312
.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"])
1313
767
1314
768
global main_loop
769
global bus
770
global server
1315
771
# From the Avahi example code
1316
772
DBusGMainLoop(set_as_default=True )
1317
773
main_loop = gobject.MainLoop()
1318
774
bus = dbus.SystemBus()
775
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
776
avahi.DBUS_PATH_SERVER),
777
avahi.DBUS_INTERFACE_SERVER)
1319
778
# End of Avahi example code
1320
if use_dbus:
1321
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1322
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1323
service = AvahiService(name = server_settings[u"servicename"],
1324
servicetype = u"_mandos._tcp",
1325
protocol = protocol, bus = bus)
1326
if server_settings["interface"]:
1327
service.interface = (if_nametoindex
1328
(str(server_settings[u"interface"])))
1329
1330
client_class = Client
1331
if use_dbus:
1332
client_class = functools.partial(ClientDBus, bus = bus)
1333
clients.update(set(
1334
client_class(name = section,
1335
config= dict(client_config.items(section)))
1336
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()))
1337
792
if not clients:
1338
logger.warning(u"No clients defined")
793
logger.critical(u"No clients defined")
794
sys.exit(1)
1339
795
1340
796
if debug:
1341
797
# Redirect stdin so all checkers get /dev/null
1349
805
# Close all input and output, do double fork, etc.
1350
806
daemon()
1351
807
808
pidfilename = "/var/run/mandos/mandos.pid"
809
pid = os.getpid()
1352
810
try:
1353
with closing(pidfile):
1354
pid = os.getpid()
1355
pidfile.write(str(pid) + "\n")
811
pidfile = open(pidfilename, "w")
812
pidfile.write(str(pid) + "\n")
813
pidfile.close()
1356
814
del pidfile
1357
except IOError:
1358
logger.error(u"Could not write to file %r with PID %d",
1359
pidfilename, pid)
1360
except NameError:
1361
# "pidfile" was never created
1362
pass
1363
del pidfilename
815
except IOError, err:
816
logger.error(u"Could not write %s file with PID %d",
817
pidfilename, os.getpid())
1364
818
1365
819
def cleanup():
1366
820
"Cleanup function; run on exit"
1367
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
1368
827
1369
828
while clients:
1370
829
client = clients.pop()
1371
client.disable_hook = None
1372
client.disable()
830
client.stop_hook = None
831
client.stop()
1373
832
1374
833
atexit.register(cleanup)
1375
834
1378
837
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1379
838
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1380
839
1381
if use_dbus:
1382
class MandosDBusService(dbus.service.Object):
1383
"""A D-Bus proxy object"""
1384
def __init__(self):
1385
dbus.service.Object.__init__(self, bus, u"/")
1386
_interface = u"se.bsnet.fukt.Mandos"
1387
1388
@dbus.service.signal(_interface, signature=u"oa{sv}")
1389
def ClientAdded(self, objpath, properties):
1390
"D-Bus signal"
1391
pass
1392
1393
@dbus.service.signal(_interface, signature=u"s")
1394
def ClientNotFound(self, fingerprint):
1395
"D-Bus signal"
1396
pass
1397
1398
@dbus.service.signal(_interface, signature=u"os")
1399
def ClientRemoved(self, objpath, name):
1400
"D-Bus signal"
1401
pass
1402
1403
@dbus.service.method(_interface, out_signature=u"ao")
1404
def GetAllClients(self):
1405
"D-Bus method"
1406
return dbus.Array(c.dbus_object_path for c in clients)
1407
1408
@dbus.service.method(_interface,
1409
out_signature=u"a{oa{sv}}")
1410
def GetAllClientsWithProperties(self):
1411
"D-Bus method"
1412
return dbus.Dictionary(
1413
((c.dbus_object_path, c.GetAllProperties())
1414
for c in clients),
1415
signature=u"oa{sv}")
1416
1417
@dbus.service.method(_interface, in_signature=u"o")
1418
def RemoveClient(self, object_path):
1419
"D-Bus method"
1420
for c in clients:
1421
if c.dbus_object_path == object_path:
1422
clients.remove(c)
1423
c.remove_from_connection()
1424
# Don't signal anything except ClientRemoved
1425
c.disable(signal=False)
1426
# Emit D-Bus signal
1427
self.ClientRemoved(object_path, c.name)
1428
return
1429
raise KeyError
1430
1431
del _interface
1432
1433
mandos_dbus_service = MandosDBusService()
1434
1435
840
for client in clients:
1436
if use_dbus:
1437
# Emit D-Bus signal
1438
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1439
client.GetAllProperties())
1440
client.enable()
1441
1442
tcp_server.enable()
1443
tcp_server.server_activate()
1444
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)
1445
848
# Find out what port we got
1446
849
service.port = tcp_server.socket.getsockname()[1]
1447
if use_ipv6:
1448
logger.info(u"Now listening on address %r, port %d,"
1449
" flowinfo %d, scope_id %d"
1450
% tcp_server.socket.getsockname())
1451
else: # IPv4
1452
logger.info(u"Now listening on address %r, port %d"
1453
% 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())
1454
852
1455
853
#service.interface = tcp_server.socket.getsockname()[3]
1456
854
1457
855
try:
1458
856
# From the Avahi example code
857
server.connect_to_signal("StateChanged", server_state_changed)
1459
858
try:
1460
service.activate()
859
server_state_changed(server.GetState())
1461
860
except dbus.exceptions.DBusException, error:
1462
861
logger.critical(u"DBusException: %s", error)
1463
862
sys.exit(1)
1465
864
1466
865
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1467
866
lambda *args, **kwargs:
1468
(tcp_server.handle_request
1469
(*args[2:], **kwargs) or True))
867
tcp_server.handle_request\
868
(*args[2:], **kwargs) or True)
1470
869
1471
870
logger.debug(u"Starting main loop")
871
main_loop_started = True
1472
872
main_loop.run()
1473
873
except AvahiError, error:
1474
logger.critical(u"AvahiError: %s", error)
874
logger.critical(u"AvahiError: %s" + unicode(error))
1475
875
sys.exit(1)
1476
876
except KeyboardInterrupt:
1477
877
if debug:
1478
print >> sys.stderr
1479
logger.debug(u"Server received KeyboardInterrupt")
1480
logger.debug(u"Server exiting")
878
print
1481
879
1482
880
if __name__ == '__main__':
1483
881
main()
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Version: 2.0.2.dev0