To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to mandos
- browse files at revision 202
- compare with another revision
- download diff
- download tarball
- view history from revision 202
- Committer: Teddy Hogeborn
- Date: 2008-09-21 13:42:34 UTC
- Revision ID: teddy@fukt.bsnet.se-20080921134234-jo8p4rwtm50yb4xj
* clients.conf ([bar]/secfile): Do not imply armored format.
* debian/control: Build-Depend on pkg-config.
* debian/mandos.prerm (remove): Bug fix; check for
"/etc/init.d/mandos", not
"/etc/init.d/ssh".
* debian/control: Build-Depend on pkg-config.
* debian/mandos.prerm (remove): Bug fix; check for
"/etc/init.d/mandos", not
"/etc/init.d/ssh".
- files added:
- debian/mandos-client.config
- files removed:
- NEWS
- 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
58
import pwd
58
from contextlib import closing
59
import struct
60
import fcntl
61
import functools
62
59
63
60
import dbus
64
import dbus.service
65
61
import gobject
66
62
import avahi
67
63
from dbus.mainloop.glib import DBusGMainLoop
68
64
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'))
65
66
version = "1.0"
67
68
logger = logging.Logger('mandos')
69
syslogger = logging.handlers.SysLogHandler\
70
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
71
address = "/dev/log")
72
syslogger.setFormatter(logging.Formatter\
73
('Mandos: %(levelname)s: %(message)s'))
89
74
logger.addHandler(syslogger)
90
75
91
76
console = logging.StreamHandler()
92
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
93
u' %(levelname)s:'
94
u' %(message)s'))
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
78
' %(message)s'))
95
79
logger.addHandler(console)
96
80
97
81
class AvahiError(Exception):
98
def __init__(self, value, *args, **kwargs):
82
def __init__(self, value):
99
83
self.value = value
100
super(AvahiError, self).__init__(value, *args, **kwargs)
101
def __unicode__(self):
102
return unicode(repr(self.value))
84
def __str__(self):
85
return repr(self.value)
103
86
104
87
class AvahiServiceError(AvahiError):
105
88
pass
110
93
111
94
class AvahiService(object):
112
95
"""An Avahi (Zeroconf) service.
113
114
96
Attributes:
115
97
interface: integer; avahi.IF_UNSPEC or an interface index.
116
98
Used to optionally bind to the specified interface.
117
name: string; Example: u'Mandos'
118
type: string; Example: u'_mandos._tcp'.
99
name: string; Example: 'Mandos'
100
type: string; Example: '_mandos._tcp'.
119
101
See <http://www.dns-sd.org/ServiceTypes.html>
120
102
port: integer; what port to announce
121
103
TXT: list of strings; TXT record for the service
124
106
max_renames: integer; maximum number of renames
125
107
rename_count: integer; counter so we only rename after collisions
126
108
a sensible number of times
127
group: D-Bus Entry Group
128
server: D-Bus Server
129
bus: dbus.SystemBus()
130
109
"""
131
110
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):
111
type = None, port = None, TXT = None, domain = "",
112
host = "", max_renames = 32768):
135
113
self.interface = interface
136
114
self.name = name
137
self.type = servicetype
115
self.type = type
138
116
self.port = port
139
self.TXT = TXT if TXT is not None else []
117
if TXT is None:
118
self.TXT = []
119
else:
120
self.TXT = TXT
140
121
self.domain = domain
141
122
self.host = host
142
123
self.rename_count = 0
143
124
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
125
def rename(self):
149
126
"""Derived from the Avahi example code"""
150
127
if self.rename_count >= self.max_renames:
151
128
logger.critical(u"No suitable Zeroconf service name found"
152
129
u" after %i retries, exiting.",
153
self.rename_count)
154
raise AvahiServiceError(u"Too many renames")
155
self.name = self.server.GetAlternativeServiceName(self.name)
130
rename_count)
131
raise AvahiServiceError("Too many renames")
132
self.name = server.GetAlternativeServiceName(self.name)
156
133
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))
134
str(self.name))
135
syslogger.setFormatter(logging.Formatter\
136
('Mandos (%s): %%(levelname)s:'
137
' %%(message)s' % self.name))
162
138
self.remove()
163
139
self.add()
164
140
self.rename_count += 1
165
141
def remove(self):
166
142
"""Derived from the Avahi example code"""
167
if self.group is not None:
168
self.group.Reset()
143
if group is not None:
144
group.Reset()
169
145
def add(self):
170
146
"""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)
147
global group
148
if group is None:
149
group = dbus.Interface\
150
(bus.get_object(avahi.DBUS_NAME,
151
server.EntryGroupNew()),
152
avahi.DBUS_INTERFACE_ENTRY_GROUP)
153
group.connect_to_signal('StateChanged',
154
entry_group_state_changed)
178
155
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())
156
service.name, service.type)
157
group.AddService(
158
self.interface, # interface
159
avahi.PROTO_INET6, # protocol
160
dbus.UInt32(0), # flags
161
self.name, self.type,
162
self.domain, self.host,
163
dbus.UInt16(self.port),
164
avahi.string_array_to_txt_array(self.TXT))
165
group.Commit()
166
167
# From the Avahi example code:
168
group = None # our entry group
169
# End of Avahi example code
225
170
226
171
227
172
class Client(object):
228
173
"""A representation of a client host served by this server.
229
230
174
Attributes:
231
name: string; from the config file, used in log messages and
232
D-Bus identifiers
175
name: string; from the config file, used in log messages
233
176
fingerprint: string (40 or 32 hexadecimal digits); used to
234
177
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.
178
secret: bytestring; sent verbatim (over TLS) to client
179
host: string; available for use by the checker command
180
created: datetime.datetime(); object creation, not client host
181
last_checked_ok: datetime.datetime() or None if not yet checked OK
182
timeout: datetime.timedelta(); How long from last_checked_ok
183
until this client is invalid
184
interval: datetime.timedelta(); How often to start a new checker
185
stop_hook: If set, called by stop() as stop_hook(self)
186
checker: subprocess.Popen(); a running checker process used
187
to see if the client lives.
188
'None' if no process is running.
248
189
checker_initiator_tag: a gobject event source tag, or None
249
disable_initiator_tag: - '' -
190
stop_initiator_tag: - '' -
250
191
checker_callback_tag: - '' -
251
192
checker_command: string; External command which is run to check if
252
193
client lives. %() expansions are done at
253
194
runtime with vars(self) as dict, so that for
254
195
instance %(name)s can be used in the command.
255
current_checker_command: string; current running checker_command
196
Private attibutes:
197
_timeout: Real variable for 'timeout'
198
_interval: Real variable for 'interval'
199
_timeout_milliseconds: Used when calling gobject.timeout_add()
200
_interval_milliseconds: - '' -
256
201
"""
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):
202
def _set_timeout(self, timeout):
203
"Setter function for 'timeout' attribute"
204
self._timeout = timeout
205
self._timeout_milliseconds = ((self.timeout.days
206
* 24 * 60 * 60 * 1000)
207
+ (self.timeout.seconds * 1000)
208
+ (self.timeout.microseconds
209
// 1000))
210
timeout = property(lambda self: self._timeout,
211
_set_timeout)
212
del _set_timeout
213
def _set_interval(self, interval):
214
"Setter function for 'interval' attribute"
215
self._interval = interval
216
self._interval_milliseconds = ((self.interval.days
217
* 24 * 60 * 60 * 1000)
218
+ (self.interval.seconds
219
* 1000)
220
+ (self.interval.microseconds
221
// 1000))
222
interval = property(lambda self: self._interval,
223
_set_interval)
224
del _set_interval
225
def __init__(self, name = None, stop_hook=None, config={}):
274
226
"""Note: the 'checker' key in 'config' sets the
275
227
'checker_command' attribute and *not* the 'checker'
276
228
attribute."""
277
229
self.name = name
278
if config is None:
279
config = {}
280
230
logger.debug(u"Creating client %r", self.name)
281
231
# Uppercase and remove spaces from fingerprint for later
282
232
# comparison purposes with return value from the fingerprint()
283
233
# function
284
self.fingerprint = (config[u"fingerprint"].upper()
285
.replace(u" ", u""))
234
self.fingerprint = config["fingerprint"].upper()\
235
.replace(u" ", u"")
286
236
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()
237
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
239
elif "secfile" in config:
240
sf = open(config["secfile"])
241
self.secret = sf.read()
242
sf.close()
294
243
else:
295
244
raise TypeError(u"No secret or secfile for client %s"
296
245
% 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
246
self.host = config.get("host", "")
247
self.created = datetime.datetime.now()
301
248
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
249
self.timeout = string_to_delta(config["timeout"])
250
self.interval = string_to_delta(config["interval"])
251
self.stop_hook = stop_hook
305
252
self.checker = None
306
253
self.checker_initiator_tag = None
307
self.disable_initiator_tag = None
254
self.stop_initiator_tag = None
308
255
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):
256
self.check_command = config["checker"]
257
def start(self):
314
258
"""Start this client's checker and timeout hooks"""
315
self.last_enabled = datetime.datetime.utcnow()
316
259
# Schedule a new checker to be started an 'interval' from now,
317
260
# and every interval from then on.
318
self.checker_initiator_tag = (gobject.timeout_add
319
(self.interval_milliseconds(),
320
self.start_checker))
261
self.checker_initiator_tag = gobject.timeout_add\
262
(self._interval_milliseconds,
263
self.start_checker)
321
264
# Also start a new checker *right now*.
322
265
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):
266
# Schedule a stop() when 'timeout' has passed
267
self.stop_initiator_tag = gobject.timeout_add\
268
(self._timeout_milliseconds,
269
self.stop)
270
def stop(self):
271
"""Stop this client.
272
The possibility that a client might be restarted is left open,
273
but not currently used."""
274
# If this client doesn't have a secret, it is already stopped.
275
if hasattr(self, "secret") and self.secret:
276
logger.info(u"Stopping client %s", self.name)
277
self.secret = None
278
else:
332
279
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):
280
if getattr(self, "stop_initiator_tag", False):
281
gobject.source_remove(self.stop_initiator_tag)
282
self.stop_initiator_tag = None
283
if getattr(self, "checker_initiator_tag", False):
338
284
gobject.source_remove(self.checker_initiator_tag)
339
285
self.checker_initiator_tag = None
340
286
self.stop_checker()
341
if self.disable_hook:
342
self.disable_hook(self)
343
self.enabled = False
287
if self.stop_hook:
288
self.stop_hook(self)
344
289
# Do not run this again if called by a gobject.timeout_add
345
290
return False
346
347
291
def __del__(self):
348
self.disable_hook = None
349
self.disable()
350
351
def checker_callback(self, pid, condition, command):
292
self.stop_hook = None
293
self.stop()
294
def checker_callback(self, pid, condition):
352
295
"""The checker has completed, so take appropriate actions."""
296
now = datetime.datetime.now()
353
297
self.checker_callback_tag = None
354
298
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:
299
if os.WIFEXITED(condition) \
300
and (os.WEXITSTATUS(condition) == 0):
301
logger.info(u"Checker for %(name)s succeeded",
302
vars(self))
303
self.last_checked_ok = now
304
gobject.source_remove(self.stop_initiator_tag)
305
self.stop_initiator_tag = gobject.timeout_add\
306
(self._timeout_milliseconds,
307
self.stop)
308
elif not os.WIFEXITED(condition):
365
309
logger.warning(u"Checker for %(name)s crashed?",
366
310
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
311
else:
312
logger.info(u"Checker for %(name)s failed",
313
vars(self))
380
314
def start_checker(self):
381
315
"""Start a new checker subprocess if one is not running.
382
383
316
If a checker already exists, leave it running and do
384
317
nothing."""
385
318
# The reason for not killing a running checker is that if we
390
323
# checkers alone, the checker would have to take more time
391
324
# than 'timeout' for the client to be declared invalid, which
392
325
# 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
326
if self.checker is None:
404
327
try:
405
# In case checker_command has exactly one % operator
406
command = self.checker_command % self.host
328
# In case check_command has exactly one % operator
329
command = self.check_command % self.host
407
330
except TypeError:
408
331
# Escape attributes for the shell
409
escaped_attrs = dict((key,
410
re.escape(unicode(str(val),
411
errors=
412
u'replace')))
332
escaped_attrs = dict((key, re.escape(str(val)))
413
333
for key, val in
414
334
vars(self).iteritems())
415
335
try:
416
command = self.checker_command % escaped_attrs
336
command = self.check_command % escaped_attrs
417
337
except TypeError, error:
418
338
logger.error(u'Could not format string "%s":'
419
u' %s', self.checker_command, error)
339
u' %s', self.check_command, error)
420
340
return True # Try again later
421
self.current_checker_command = command
422
341
try:
423
342
logger.info(u"Starting checker %r for %s",
424
343
command, self.name)
428
347
# always replaced by /dev/null.)
429
348
self.checker = subprocess.Popen(command,
430
349
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)
350
shell=True, cwd="/")
351
self.checker_callback_tag = gobject.child_watch_add\
352
(self.checker.pid,
353
self.checker_callback)
442
354
except OSError, error:
443
355
logger.error(u"Failed to start subprocess: %s",
444
356
error)
445
357
# Re-run this periodically if run by gobject.timeout_add
446
358
return True
447
448
359
def stop_checker(self):
449
360
"""Force the checker process, if any, to stop."""
450
361
if self.checker_callback_tag:
451
362
gobject.source_remove(self.checker_callback_tag)
452
363
self.checker_callback_tag = None
453
if getattr(self, u"checker", None) is None:
364
if getattr(self, "checker", None) is None:
454
365
return
455
366
logger.debug(u"Stopping checker for %(name)s", vars(self))
456
367
try:
462
373
if error.errno != errno.ESRCH: # No such process
463
374
raise
464
375
self.checker = None
465
466
376
def still_valid(self):
467
377
"""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()
378
now = datetime.datetime.now()
471
379
if self.last_checked_ok is None:
472
380
return now < (self.created + self.timeout)
473
381
else:
474
382
return now < (self.last_checked_ok + self.timeout)
475
383
476
384
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.
385
def peer_certificate(session):
386
"Return the peer's OpenPGP certificate as a bytestring"
387
# If not an OpenPGP certificate...
388
if gnutls.library.functions.gnutls_certificate_type_get\
389
(session._c_object) \
390
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
391
# ...do the normal thing
392
return session.peer_certificate
393
list_size = ctypes.c_uint()
394
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
395
(session._c_object, ctypes.byref(list_size))
396
if list_size.value == 0:
397
return None
398
cert = cert_list[0]
399
return ctypes.string_at(cert.data, cert.size)
400
401
402
def fingerprint(openpgp):
403
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
404
# New GnuTLS "datum" with the OpenPGP public key
405
datum = gnutls.library.types.gnutls_datum_t\
406
(ctypes.cast(ctypes.c_char_p(openpgp),
407
ctypes.POINTER(ctypes.c_ubyte)),
408
ctypes.c_uint(len(openpgp)))
409
# New empty GnuTLS certificate
410
crt = gnutls.library.types.gnutls_openpgp_crt_t()
411
gnutls.library.functions.gnutls_openpgp_crt_init\
412
(ctypes.byref(crt))
413
# Import the OpenPGP public key into the certificate
414
gnutls.library.functions.gnutls_openpgp_crt_import\
415
(crt, ctypes.byref(datum),
416
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
417
# Verify the self signature in the key
418
crtverify = ctypes.c_uint();
419
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
420
(crt, 0, ctypes.byref(crtverify))
421
if crtverify.value != 0:
422
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
423
raise gnutls.errors.CertificateSecurityError("Verify failed")
424
# New buffer for the fingerprint
425
buffer = ctypes.create_string_buffer(20)
426
buffer_length = ctypes.c_size_t()
427
# Get the fingerprint from the certificate into the buffer
428
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
429
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
430
# Deinit the certificate
431
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
432
# Convert the buffer to a Python bytestring
433
fpr = ctypes.string_at(buffer, buffer_length.value)
434
# Convert the bytestring to hexadecimal notation
435
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
436
return hex_fpr
437
438
439
class tcp_handler(SocketServer.BaseRequestHandler, object):
440
"""A TCP request handler class.
441
Instantiated by IPv6_TCPServer for each request to handle it.
751
442
Note: This will run in its own forked process."""
752
443
753
444
def handle(self):
754
445
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
def process_request(self, request, client_address):
898
"""Overrides and wraps the original process_request().
899
900
This function creates a new pipe in self.pipe
901
"""
902
self.pipe = os.pipe()
903
super(ForkingMixInWithPipe,
904
self).process_request(request, client_address)
905
os.close(self.pipe[1]) # close write end
906
self.add_pipe(self.pipe[0])
907
def add_pipe(self, pipe):
908
"""Dummy function; override as necessary"""
909
os.close(pipe)
910
911
912
class IPv6_TCPServer(ForkingMixInWithPipe,
913
socketserver.TCPServer, object):
914
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
915
446
unicode(self.client_address))
447
session = gnutls.connection.ClientSession\
448
(self.request, gnutls.connection.X509Credentials())
449
450
line = self.request.makefile().readline()
451
logger.debug(u"Protocol version: %r", line)
452
try:
453
if int(line.strip().split()[0]) > 1:
454
raise RuntimeError
455
except (ValueError, IndexError, RuntimeError), error:
456
logger.error(u"Unknown protocol version: %s", error)
457
return
458
459
# Note: gnutls.connection.X509Credentials is really a generic
460
# GnuTLS certificate credentials object so long as no X.509
461
# keys are added to it. Therefore, we can use it here despite
462
# using OpenPGP certificates.
463
464
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
465
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
466
# "+DHE-DSS"))
467
priority = "NORMAL" # Fallback default, since this
468
# MUST be set.
469
if self.server.settings["priority"]:
470
priority = self.server.settings["priority"]
471
gnutls.library.functions.gnutls_priority_set_direct\
472
(session._c_object, priority, None);
473
474
try:
475
session.handshake()
476
except gnutls.errors.GNUTLSError, error:
477
logger.warning(u"Handshake failed: %s", error)
478
# Do not run session.bye() here: the session is not
479
# established. Just abandon the request.
480
return
481
try:
482
fpr = fingerprint(peer_certificate(session))
483
except (TypeError, gnutls.errors.GNUTLSError), error:
484
logger.warning(u"Bad certificate: %s", error)
485
session.bye()
486
return
487
logger.debug(u"Fingerprint: %s", fpr)
488
client = None
489
for c in self.server.clients:
490
if c.fingerprint == fpr:
491
client = c
492
break
493
if not client:
494
logger.warning(u"Client not found for fingerprint: %s",
495
fpr)
496
session.bye()
497
return
498
# Have to check if client.still_valid(), since it is possible
499
# that the client timed out while establishing the GnuTLS
500
# session.
501
if not client.still_valid():
502
logger.warning(u"Client %(name)s is invalid",
503
vars(client))
504
session.bye()
505
return
506
sent_size = 0
507
while sent_size < len(client.secret):
508
sent = session.send(client.secret[sent_size:])
509
logger.debug(u"Sent: %d, remaining: %d",
510
sent, len(client.secret)
511
- (sent_size + sent))
512
sent_size += sent
513
session.bye()
514
515
516
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
517
"""IPv6 TCP server. Accepts 'None' as address and/or port.
916
518
Attributes:
519
settings: Server settings
520
clients: Set() of Client objects
917
521
enabled: Boolean; whether this server is activated yet
918
interface: None or a network interface name (string)
919
use_ipv6: Boolean; to use IPv6 or not
920
522
"""
921
def __init__(self, server_address, RequestHandlerClass,
922
interface=None, use_ipv6=True):
923
self.interface = interface
924
if use_ipv6:
925
self.address_family = socket.AF_INET6
926
socketserver.TCPServer.__init__(self, server_address,
927
RequestHandlerClass)
523
address_family = socket.AF_INET6
524
def __init__(self, *args, **kwargs):
525
if "settings" in kwargs:
526
self.settings = kwargs["settings"]
527
del kwargs["settings"]
528
if "clients" in kwargs:
529
self.clients = kwargs["clients"]
530
del kwargs["clients"]
531
self.enabled = False
532
return super(type(self), self).__init__(*args, **kwargs)
928
533
def server_bind(self):
929
534
"""This overrides the normal server_bind() function
930
535
to bind to an interface if one was specified, and also NOT to
931
536
bind to an address or port if they were not specified."""
932
if self.interface is not None:
933
if SO_BINDTODEVICE is None:
934
logger.error(u"SO_BINDTODEVICE does not exist;"
935
u" cannot bind to interface %s",
936
self.interface)
937
else:
938
try:
939
self.socket.setsockopt(socket.SOL_SOCKET,
940
SO_BINDTODEVICE,
941
str(self.interface
942
+ u'\0'))
943
except socket.error, error:
944
if error[0] == errno.EPERM:
945
logger.error(u"No permission to"
946
u" bind to interface %s",
947
self.interface)
948
elif error[0] == errno.ENOPROTOOPT:
949
logger.error(u"SO_BINDTODEVICE not available;"
950
u" cannot bind to interface %s",
951
self.interface)
952
else:
953
raise
537
if self.settings["interface"]:
538
# 25 is from /usr/include/asm-i486/socket.h
539
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
540
try:
541
self.socket.setsockopt(socket.SOL_SOCKET,
542
SO_BINDTODEVICE,
543
self.settings["interface"])
544
except socket.error, error:
545
if error[0] == errno.EPERM:
546
logger.error(u"No permission to"
547
u" bind to interface %s",
548
self.settings["interface"])
549
else:
550
raise error
954
551
# Only bind(2) the socket if we really need to.
955
552
if self.server_address[0] or self.server_address[1]:
956
553
if not self.server_address[0]:
957
if self.address_family == socket.AF_INET6:
958
any_address = u"::" # in6addr_any
959
else:
960
any_address = socket.INADDR_ANY
961
self.server_address = (any_address,
554
in6addr_any = "::"
555
self.server_address = (in6addr_any,
962
556
self.server_address[1])
963
557
elif not self.server_address[1]:
964
558
self.server_address = (self.server_address[0],
965
559
0)
966
# if self.interface:
560
# if self.settings["interface"]:
967
561
# self.server_address = (self.server_address[0],
968
562
# 0, # port
969
563
# 0, # flowinfo
970
564
# if_nametoindex
971
# (self.interface))
972
return socketserver.TCPServer.server_bind(self)
973
974
975
class MandosServer(IPv6_TCPServer):
976
"""Mandos server.
977
978
Attributes:
979
clients: set of Client objects
980
gnutls_priority GnuTLS priority string
981
use_dbus: Boolean; to emit D-Bus signals or not
982
clients: set of Client objects
983
gnutls_priority GnuTLS priority string
984
use_dbus: Boolean; to emit D-Bus signals or not
985
986
Assumes a gobject.MainLoop event loop.
987
"""
988
def __init__(self, server_address, RequestHandlerClass,
989
interface=None, use_ipv6=True, clients=None,
990
gnutls_priority=None, use_dbus=True):
991
self.enabled = False
992
self.clients = clients
993
self.use_dbus = use_dbus
994
self.gnutls_priority = gnutls_priority
995
IPv6_TCPServer.__init__(self, server_address,
996
RequestHandlerClass,
997
interface = interface,
998
use_ipv6 = use_ipv6)
565
# (self.settings
566
# ["interface"]))
567
return super(type(self), self).server_bind()
999
568
def server_activate(self):
1000
569
if self.enabled:
1001
return socketserver.TCPServer.server_activate(self)
570
return super(type(self), self).server_activate()
1002
571
def enable(self):
1003
572
self.enabled = True
1004
def add_pipe(self, pipe):
1005
# Call "handle_ipc" for both data and EOF events
1006
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1007
self.handle_ipc)
1008
def handle_ipc(self, source, condition, file_objects={}):
1009
condition_names = {
1010
gobject.IO_IN: u"IN", # There is data to read.
1011
gobject.IO_OUT: u"OUT", # Data can be written (without
1012
# blocking).
1013
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1014
gobject.IO_ERR: u"ERR", # Error condition.
1015
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1016
# broken, usually for pipes and
1017
# sockets).
1018
}
1019
conditions_string = ' | '.join(name
1020
for cond, name in
1021
condition_names.iteritems()
1022
if cond & condition)
1023
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1024
conditions_string)
1025
1026
# Turn the pipe file descriptor into a Python file object
1027
if source not in file_objects:
1028
file_objects[source] = os.fdopen(source, u"r", 1)
1029
1030
# Read a line from the file object
1031
cmdline = file_objects[source].readline()
1032
if not cmdline: # Empty line means end of file
1033
# close the IPC pipe
1034
file_objects[source].close()
1035
del file_objects[source]
1036
1037
# Stop calling this function
1038
return False
1039
1040
logger.debug(u"IPC command: %r", cmdline)
1041
1042
# Parse and act on command
1043
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1044
1045
if cmd == u"NOTFOUND":
1046
logger.warning(u"Client not found for fingerprint: %s",
1047
args)
1048
if self.use_dbus:
1049
# Emit D-Bus signal
1050
mandos_dbus_service.ClientNotFound(args)
1051
elif cmd == u"INVALID":
1052
for client in self.clients:
1053
if client.name == args:
1054
logger.warning(u"Client %s is invalid", args)
1055
if self.use_dbus:
1056
# Emit D-Bus signal
1057
client.Rejected()
1058
break
1059
else:
1060
logger.error(u"Unknown client %s is invalid", args)
1061
elif cmd == u"SENDING":
1062
for client in self.clients:
1063
if client.name == args:
1064
logger.info(u"Sending secret to %s", client.name)
1065
client.checked_ok()
1066
if self.use_dbus:
1067
# Emit D-Bus signal
1068
client.ReceivedSecret()
1069
break
1070
else:
1071
logger.error(u"Sending secret to unknown client %s",
1072
args)
1073
else:
1074
logger.error(u"Unknown IPC command: %r", cmdline)
1075
1076
# Keep calling this function
1077
return True
1078
573
1079
574
1080
575
def string_to_delta(interval):
1081
576
"""Parse a string and return a datetime.timedelta
1082
1083
>>> string_to_delta(u'7d')
577
578
>>> string_to_delta('7d')
1084
579
datetime.timedelta(7)
1085
>>> string_to_delta(u'60s')
580
>>> string_to_delta('60s')
1086
581
datetime.timedelta(0, 60)
1087
>>> string_to_delta(u'60m')
582
>>> string_to_delta('60m')
1088
583
datetime.timedelta(0, 3600)
1089
>>> string_to_delta(u'24h')
584
>>> string_to_delta('24h')
1090
585
datetime.timedelta(1)
1091
586
>>> string_to_delta(u'1w')
1092
587
datetime.timedelta(7)
1093
>>> string_to_delta(u'5m 30s')
588
>>> string_to_delta('5m 30s')
1094
589
datetime.timedelta(0, 330)
1095
590
"""
1096
591
timevalue = datetime.timedelta(0)
1097
592
for s in interval.split():
1098
593
try:
1099
suffix = unicode(s[-1])
1100
value = int(s[:-1])
594
suffix=unicode(s[-1])
595
value=int(s[:-1])
1101
596
if suffix == u"d":
1102
597
delta = datetime.timedelta(value)
1103
598
elif suffix == u"s":
1116
611
return timevalue
1117
612
1118
613
614
def server_state_changed(state):
615
"""Derived from the Avahi example code"""
616
if state == avahi.SERVER_COLLISION:
617
logger.error(u"Zeroconf server name collision")
618
service.remove()
619
elif state == avahi.SERVER_RUNNING:
620
service.add()
621
622
623
def entry_group_state_changed(state, error):
624
"""Derived from the Avahi example code"""
625
logger.debug(u"Avahi state change: %i", state)
626
627
if state == avahi.ENTRY_GROUP_ESTABLISHED:
628
logger.debug(u"Zeroconf service established.")
629
elif state == avahi.ENTRY_GROUP_COLLISION:
630
logger.warning(u"Zeroconf service name collision.")
631
service.rename()
632
elif state == avahi.ENTRY_GROUP_FAILURE:
633
logger.critical(u"Avahi: Error in group state changed %s",
634
unicode(error))
635
raise AvahiGroupError("State changed: %s", str(error))
636
1119
637
def if_nametoindex(interface):
1120
"""Call the C function if_nametoindex(), or equivalent
1121
1122
Note: This function cannot accept a unicode string."""
638
"""Call the C function if_nametoindex(), or equivalent"""
1123
639
global if_nametoindex
1124
640
try:
1125
if_nametoindex = (ctypes.cdll.LoadLibrary
1126
(ctypes.util.find_library(u"c"))
1127
.if_nametoindex)
641
if "ctypes.util" not in sys.modules:
642
import ctypes.util
643
if_nametoindex = ctypes.cdll.LoadLibrary\
644
(ctypes.util.find_library("c")).if_nametoindex
1128
645
except (OSError, AttributeError):
1129
logger.warning(u"Doing if_nametoindex the hard way")
646
if "struct" not in sys.modules:
647
import struct
648
if "fcntl" not in sys.modules:
649
import fcntl
1130
650
def if_nametoindex(interface):
1131
651
"Get an interface index the hard way, i.e. using fcntl()"
1132
652
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1133
with closing(socket.socket()) as s:
1134
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1135
struct.pack(str(u"16s16x"),
1136
interface))
1137
interface_index = struct.unpack(str(u"I"),
1138
ifreq[16:20])[0]
653
s = socket.socket()
654
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
655
struct.pack("16s16x", interface))
656
s.close()
657
interface_index = struct.unpack("I", ifreq[16:20])[0]
1139
658
return interface_index
1140
659
return if_nametoindex(interface)
1141
660
1142
661
1143
662
def daemon(nochdir = False, noclose = False):
1144
663
"""See daemon(3). Standard BSD Unix function.
1145
1146
664
This should really exist as os.daemon, but it doesn't (yet)."""
1147
665
if os.fork():
1148
666
sys.exit()
1149
667
os.setsid()
1150
668
if not nochdir:
1151
os.chdir(u"/")
669
os.chdir("/")
1152
670
if os.fork():
1153
671
sys.exit()
1154
672
if not noclose:
1156
674
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1157
675
if not stat.S_ISCHR(os.fstat(null).st_mode):
1158
676
raise OSError(errno.ENODEV,
1159
u"/dev/null not a character device")
677
"/dev/null not a character device")
1160
678
os.dup2(null, sys.stdin.fileno())
1161
679
os.dup2(null, sys.stdout.fileno())
1162
680
os.dup2(null, sys.stderr.fileno())
1165
683
1166
684
1167
685
def main():
1168
1169
######################################################################
1170
# Parsing of options, both command line and config file
1171
1172
parser = optparse.OptionParser(version = "%%prog %s" % version)
1173
parser.add_option("-i", u"--interface", type=u"string",
1174
metavar="IF", help=u"Bind to interface IF")
1175
parser.add_option("-a", u"--address", type=u"string",
1176
help=u"Address to listen for requests on")
1177
parser.add_option("-p", u"--port", type=u"int",
1178
help=u"Port number to receive requests on")
1179
parser.add_option("--check", action=u"store_true",
1180
help=u"Run self-test")
1181
parser.add_option("--debug", action=u"store_true",
1182
help=u"Debug mode; run in foreground and log to"
1183
u" terminal")
1184
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1185
u" priority string (see GnuTLS documentation)")
1186
parser.add_option("--servicename", type=u"string",
1187
metavar=u"NAME", help=u"Zeroconf service name")
1188
parser.add_option("--configdir", type=u"string",
1189
default=u"/etc/mandos", metavar=u"DIR",
1190
help=u"Directory to search for configuration"
1191
u" files")
1192
parser.add_option("--no-dbus", action=u"store_false",
1193
dest=u"use_dbus", help=u"Do not provide D-Bus"
1194
u" system bus interface")
1195
parser.add_option("--no-ipv6", action=u"store_false",
1196
dest=u"use_ipv6", help=u"Do not use IPv6")
1197
options = parser.parse_args()[0]
686
global main_loop_started
687
main_loop_started = False
688
689
parser = OptionParser(version = "%%prog %s" % version)
690
parser.add_option("-i", "--interface", type="string",
691
metavar="IF", help="Bind to interface IF")
692
parser.add_option("-a", "--address", type="string",
693
help="Address to listen for requests on")
694
parser.add_option("-p", "--port", type="int",
695
help="Port number to receive requests on")
696
parser.add_option("--check", action="store_true", default=False,
697
help="Run self-test")
698
parser.add_option("--debug", action="store_true",
699
help="Debug mode; run in foreground and log to"
700
" terminal")
701
parser.add_option("--priority", type="string", help="GnuTLS"
702
" priority string (see GnuTLS documentation)")
703
parser.add_option("--servicename", type="string", metavar="NAME",
704
help="Zeroconf service name")
705
parser.add_option("--configdir", type="string",
706
default="/etc/mandos", metavar="DIR",
707
help="Directory to search for configuration"
708
" files")
709
(options, args) = parser.parse_args()
1198
710
1199
711
if options.check:
1200
712
import doctest
1202
714
sys.exit()
1203
715
1204
716
# Default values for config file for server-global settings
1205
server_defaults = { u"interface": u"",
1206
u"address": u"",
1207
u"port": u"",
1208
u"debug": u"False",
1209
u"priority":
1210
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1211
u"servicename": u"Mandos",
1212
u"use_dbus": u"True",
1213
u"use_ipv6": u"True",
717
server_defaults = { "interface": "",
718
"address": "",
719
"port": "",
720
"debug": "False",
721
"priority":
722
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
723
"servicename": "Mandos",
1214
724
}
1215
725
1216
726
# Parse config file for server-global settings
1217
server_config = configparser.SafeConfigParser(server_defaults)
727
server_config = ConfigParser.SafeConfigParser(server_defaults)
1218
728
del server_defaults
1219
server_config.read(os.path.join(options.configdir,
1220
u"mandos.conf"))
729
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1221
730
# Convert the SafeConfigParser object to a dict
1222
731
server_settings = server_config.defaults()
1223
# Use the appropriate methods on the non-string config options
1224
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1225
server_settings[option] = server_config.getboolean(u"DEFAULT",
1226
option)
1227
if server_settings["port"]:
1228
server_settings["port"] = server_config.getint(u"DEFAULT",
1229
u"port")
732
# Use getboolean on the boolean config option
733
server_settings["debug"] = server_config.getboolean\
734
("DEFAULT", "debug")
1230
735
del server_config
1231
736
1232
737
# Override the settings from the config file with command line
1233
738
# options, if set.
1234
for option in (u"interface", u"address", u"port", u"debug",
1235
u"priority", u"servicename", u"configdir",
1236
u"use_dbus", u"use_ipv6"):
739
for option in ("interface", "address", "port", "debug",
740
"priority", "servicename", "configdir"):
1237
741
value = getattr(options, option)
1238
742
if value is not None:
1239
743
server_settings[option] = value
1240
744
del options
1241
# Force all strings to be unicode
1242
for option in server_settings.keys():
1243
if type(server_settings[option]) is str:
1244
server_settings[option] = unicode(server_settings[option])
1245
745
# Now we have our good server settings in "server_settings"
1246
746
1247
##################################################################
1248
1249
# For convenience
1250
debug = server_settings[u"debug"]
1251
use_dbus = server_settings[u"use_dbus"]
1252
use_ipv6 = server_settings[u"use_ipv6"]
747
debug = server_settings["debug"]
1253
748
1254
749
if not debug:
1255
750
syslogger.setLevel(logging.WARNING)
1256
751
console.setLevel(logging.WARNING)
1257
752
1258
if server_settings[u"servicename"] != u"Mandos":
1259
syslogger.setFormatter(logging.Formatter
1260
(u'Mandos (%s) [%%(process)d]:'
1261
u' %%(levelname)s: %%(message)s'
1262
% server_settings[u"servicename"]))
753
if server_settings["servicename"] != "Mandos":
754
syslogger.setFormatter(logging.Formatter\
755
('Mandos (%s): %%(levelname)s:'
756
' %%(message)s'
757
% server_settings["servicename"]))
1263
758
1264
759
# Parse config file with clients
1265
client_defaults = { u"timeout": u"1h",
1266
u"interval": u"5m",
1267
u"checker": u"fping -q -- %%(host)s",
1268
u"host": u"",
760
client_defaults = { "timeout": "1h",
761
"interval": "5m",
762
"checker": "fping -q -- %(host)s",
763
"host": "",
1269
764
}
1270
client_config = configparser.SafeConfigParser(client_defaults)
1271
client_config.read(os.path.join(server_settings[u"configdir"],
1272
u"clients.conf"))
1273
1274
global mandos_dbus_service
1275
mandos_dbus_service = None
1276
1277
clients = set()
1278
tcp_server = MandosServer((server_settings[u"address"],
1279
server_settings[u"port"]),
1280
ClientHandler,
1281
interface=server_settings[u"interface"],
1282
use_ipv6=use_ipv6,
1283
clients=clients,
1284
gnutls_priority=
1285
server_settings[u"priority"],
1286
use_dbus=use_dbus)
1287
pidfilename = u"/var/run/mandos.pid"
1288
try:
1289
pidfile = open(pidfilename, u"w")
1290
except IOError:
1291
logger.error(u"Could not open file %r", pidfilename)
1292
1293
try:
1294
uid = pwd.getpwnam(u"_mandos").pw_uid
1295
gid = pwd.getpwnam(u"_mandos").pw_gid
1296
except KeyError:
1297
try:
1298
uid = pwd.getpwnam(u"mandos").pw_uid
1299
gid = pwd.getpwnam(u"mandos").pw_gid
1300
except KeyError:
1301
try:
1302
uid = pwd.getpwnam(u"nobody").pw_uid
1303
gid = pwd.getpwnam(u"nobody").pw_gid
1304
except KeyError:
1305
uid = 65534
1306
gid = 65534
1307
try:
765
client_config = ConfigParser.SafeConfigParser(client_defaults)
766
client_config.read(os.path.join(server_settings["configdir"],
767
"clients.conf"))
768
769
clients = Set()
770
tcp_server = IPv6_TCPServer((server_settings["address"],
771
server_settings["port"]),
772
tcp_handler,
773
settings=server_settings,
774
clients=clients)
775
pidfilename = "/var/run/mandos.pid"
776
try:
777
pidfile = open(pidfilename, "w")
778
except IOError, error:
779
logger.error("Could not open file %r", pidfilename)
780
781
uid = 65534
782
gid = 65534
783
try:
784
uid = pwd.getpwnam("mandos").pw_uid
785
except KeyError:
786
try:
787
uid = pwd.getpwnam("nobody").pw_uid
788
except KeyError:
789
pass
790
try:
791
gid = pwd.getpwnam("mandos").pw_gid
792
except KeyError:
793
try:
794
gid = pwd.getpwnam("nogroup").pw_gid
795
except KeyError:
796
pass
797
try:
798
os.setuid(uid)
1308
799
os.setgid(gid)
1309
os.setuid(uid)
1310
800
except OSError, error:
1311
801
if error[0] != errno.EPERM:
1312
802
raise error
1313
803
1314
# Enable all possible GnuTLS debugging
1315
if debug:
1316
# "Use a log level over 10 to enable all debugging options."
1317
# - GnuTLS manual
1318
gnutls.library.functions.gnutls_global_set_log_level(11)
1319
1320
@gnutls.library.types.gnutls_log_func
1321
def debug_gnutls(level, string):
1322
logger.debug(u"GnuTLS: %s", string[:-1])
1323
1324
(gnutls.library.functions
1325
.gnutls_global_set_log_function(debug_gnutls))
804
global service
805
service = AvahiService(name = server_settings["servicename"],
806
type = "_mandos._tcp", );
807
if server_settings["interface"]:
808
service.interface = if_nametoindex\
809
(server_settings["interface"])
1326
810
1327
811
global main_loop
812
global bus
813
global server
1328
814
# From the Avahi example code
1329
815
DBusGMainLoop(set_as_default=True )
1330
816
main_loop = gobject.MainLoop()
1331
817
bus = dbus.SystemBus()
818
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
819
avahi.DBUS_PATH_SERVER),
820
avahi.DBUS_INTERFACE_SERVER)
1332
821
# End of Avahi example code
1333
if use_dbus:
1334
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1335
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1336
service = AvahiService(name = server_settings[u"servicename"],
1337
servicetype = u"_mandos._tcp",
1338
protocol = protocol, bus = bus)
1339
if server_settings["interface"]:
1340
service.interface = (if_nametoindex
1341
(str(server_settings[u"interface"])))
1342
1343
client_class = Client
1344
if use_dbus:
1345
client_class = functools.partial(ClientDBus, bus = bus)
1346
clients.update(set(
1347
client_class(name = section,
1348
config= dict(client_config.items(section)))
1349
for section in client_config.sections()))
822
823
def remove_from_clients(client):
824
clients.remove(client)
825
if not clients:
826
logger.critical(u"No clients left, exiting")
827
sys.exit()
828
829
clients.update(Set(Client(name = section,
830
stop_hook = remove_from_clients,
831
config
832
= dict(client_config.items(section)))
833
for section in client_config.sections()))
1350
834
if not clients:
1351
logger.warning(u"No clients defined")
835
logger.critical(u"No clients defined")
836
sys.exit(1)
1352
837
1353
838
if debug:
1354
839
# Redirect stdin so all checkers get /dev/null
1363
848
daemon()
1364
849
1365
850
try:
1366
with closing(pidfile):
1367
pid = os.getpid()
1368
pidfile.write(str(pid) + "\n")
851
pid = os.getpid()
852
pidfile.write(str(pid) + "\n")
853
pidfile.close()
1369
854
del pidfile
1370
except IOError:
855
except IOError, err:
1371
856
logger.error(u"Could not write to file %r with PID %d",
1372
857
pidfilename, pid)
1373
858
except NameError:
1377
862
1378
863
def cleanup():
1379
864
"Cleanup function; run on exit"
1380
service.cleanup()
865
global group
866
# From the Avahi example code
867
if not group is None:
868
group.Free()
869
group = None
870
# End of Avahi example code
1381
871
1382
872
while clients:
1383
873
client = clients.pop()
1384
client.disable_hook = None
1385
client.disable()
874
client.stop_hook = None
875
client.stop()
1386
876
1387
877
atexit.register(cleanup)
1388
878
1391
881
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1392
882
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1393
883
1394
if use_dbus:
1395
class MandosDBusService(dbus.service.Object):
1396
"""A D-Bus proxy object"""
1397
def __init__(self):
1398
dbus.service.Object.__init__(self, bus, u"/")
1399
_interface = u"se.bsnet.fukt.Mandos"
1400
1401
@dbus.service.signal(_interface, signature=u"oa{sv}")
1402
def ClientAdded(self, objpath, properties):
1403
"D-Bus signal"
1404
pass
1405
1406
@dbus.service.signal(_interface, signature=u"s")
1407
def ClientNotFound(self, fingerprint):
1408
"D-Bus signal"
1409
pass
1410
1411
@dbus.service.signal(_interface, signature=u"os")
1412
def ClientRemoved(self, objpath, name):
1413
"D-Bus signal"
1414
pass
1415
1416
@dbus.service.method(_interface, out_signature=u"ao")
1417
def GetAllClients(self):
1418
"D-Bus method"
1419
return dbus.Array(c.dbus_object_path for c in clients)
1420
1421
@dbus.service.method(_interface,
1422
out_signature=u"a{oa{sv}}")
1423
def GetAllClientsWithProperties(self):
1424
"D-Bus method"
1425
return dbus.Dictionary(
1426
((c.dbus_object_path, c.GetAllProperties())
1427
for c in clients),
1428
signature=u"oa{sv}")
1429
1430
@dbus.service.method(_interface, in_signature=u"o")
1431
def RemoveClient(self, object_path):
1432
"D-Bus method"
1433
for c in clients:
1434
if c.dbus_object_path == object_path:
1435
clients.remove(c)
1436
c.remove_from_connection()
1437
# Don't signal anything except ClientRemoved
1438
c.disable(signal=False)
1439
# Emit D-Bus signal
1440
self.ClientRemoved(object_path, c.name)
1441
return
1442
raise KeyError
1443
1444
del _interface
1445
1446
mandos_dbus_service = MandosDBusService()
1447
1448
884
for client in clients:
1449
if use_dbus:
1450
# Emit D-Bus signal
1451
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1452
client.GetAllProperties())
1453
client.enable()
885
client.start()
1454
886
1455
887
tcp_server.enable()
1456
888
tcp_server.server_activate()
1457
889
1458
890
# Find out what port we got
1459
891
service.port = tcp_server.socket.getsockname()[1]
1460
if use_ipv6:
1461
logger.info(u"Now listening on address %r, port %d,"
1462
" flowinfo %d, scope_id %d"
1463
% tcp_server.socket.getsockname())
1464
else: # IPv4
1465
logger.info(u"Now listening on address %r, port %d"
1466
% tcp_server.socket.getsockname())
892
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
893
u" scope_id %d" % tcp_server.socket.getsockname())
1467
894
1468
895
#service.interface = tcp_server.socket.getsockname()[3]
1469
896
1470
897
try:
1471
898
# From the Avahi example code
899
server.connect_to_signal("StateChanged", server_state_changed)
1472
900
try:
1473
service.activate()
901
server_state_changed(server.GetState())
1474
902
except dbus.exceptions.DBusException, error:
1475
903
logger.critical(u"DBusException: %s", error)
1476
904
sys.exit(1)
1478
906
1479
907
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1480
908
lambda *args, **kwargs:
1481
(tcp_server.handle_request
1482
(*args[2:], **kwargs) or True))
909
tcp_server.handle_request\
910
(*args[2:], **kwargs) or True)
1483
911
1484
912
logger.debug(u"Starting main loop")
913
main_loop_started = True
1485
914
main_loop.run()
1486
915
except AvahiError, error:
1487
logger.critical(u"AvahiError: %s", error)
916
logger.critical(u"AvahiError: %s" + unicode(error))
1488
917
sys.exit(1)
1489
918
except KeyboardInterrupt:
1490
919
if debug:
1491
print >> sys.stderr
1492
logger.debug(u"Server received KeyboardInterrupt")
1493
logger.debug(u"Server exiting")
920
print
1494
921
1495
922
if __name__ == '__main__':
1496
923
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0