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- Committer: Teddy Hogeborn
- Date: 2010-09-25 19:55:17 UTC
- Revision ID: teddy@fukt.bsnet.se-20100925195517-u0qfi01huxl72f75
* mandos (Client.runtime_expansions): New attribute containing the
allowed runtime expansions.
* mandos-clients.conf.xml (OPTIONS): Reordered alphabetically.
* mandos-ctl: Bug fix: print timeout and interval values pretty again.
* mandos-ctl.xml (EXAMPLE): Added more examples.
allowed runtime expansions.
* mandos-clients.conf.xml (OPTIONS): Reordered alphabetically.
* mandos-ctl: Bug fix: print timeout and interval values pretty again.
* mandos-ctl.xml (EXAMPLE): Added more examples.
- files added:
- DBUS-API
- debian/po
- files removed:
- etc-plugins.d-README
- 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" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
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".
12
12
#
13
13
# Everything else is
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
15
16
#
16
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# This program is free software: you can redistribute it and/or modify
17
18
# it under the terms of the GNU General Public License as published by
30
31
# Contact the authors at <mandos@fukt.bsnet.se>.
31
32
#
32
33
33
from __future__ import division
34
from __future__ import division, with_statement, absolute_import
34
35
35
import SocketServer
36
import SocketServer as socketserver
36
37
import socket
37
import select
38
from optparse import OptionParser
38
import optparse
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
47
import ConfigParser as configparser
48
48
import sys
49
49
import re
50
50
import os
51
51
import signal
52
from sets import Set
53
52
import subprocess
54
53
import atexit
55
54
import stat
56
55
import logging
57
56
import logging.handlers
58
57
import pwd
58
import contextlib
59
import struct
60
import fcntl
61
import functools
62
import cPickle as pickle
63
import multiprocessing
59
64
60
65
import dbus
66
import dbus.service
61
67
import gobject
62
68
import avahi
63
69
from dbus.mainloop.glib import DBusGMainLoop
64
70
import ctypes
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'))
71
import ctypes.util
72
import xml.dom.minidom
73
import inspect
74
75
try:
76
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
77
except AttributeError:
78
try:
79
from IN import SO_BINDTODEVICE
80
except ImportError:
81
SO_BINDTODEVICE = None
82
83
84
version = "1.0.14"
85
86
#logger = logging.getLogger(u'mandos')
87
logger = logging.Logger(u'mandos')
88
syslogger = (logging.handlers.SysLogHandler
89
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
90
address = "/dev/log"))
91
syslogger.setFormatter(logging.Formatter
92
(u'Mandos [%(process)d]: %(levelname)s:'
93
u' %(message)s'))
74
94
logger.addHandler(syslogger)
75
95
76
96
console = logging.StreamHandler()
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
78
' %(message)s'))
97
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
98
u' %(levelname)s:'
99
u' %(message)s'))
79
100
logger.addHandler(console)
80
101
81
102
class AvahiError(Exception):
82
def __init__(self, value):
103
def __init__(self, value, *args, **kwargs):
83
104
self.value = value
84
def __str__(self):
85
return repr(self.value)
105
super(AvahiError, self).__init__(value, *args, **kwargs)
106
def __unicode__(self):
107
return unicode(repr(self.value))
86
108
87
109
class AvahiServiceError(AvahiError):
88
110
pass
93
115
94
116
class AvahiService(object):
95
117
"""An Avahi (Zeroconf) service.
118
96
119
Attributes:
97
120
interface: integer; avahi.IF_UNSPEC or an interface index.
98
121
Used to optionally bind to the specified interface.
99
name: string; Example: 'Mandos'
100
type: string; Example: '_mandos._tcp'.
122
name: string; Example: u'Mandos'
123
type: string; Example: u'_mandos._tcp'.
101
124
See <http://www.dns-sd.org/ServiceTypes.html>
102
125
port: integer; what port to announce
103
126
TXT: list of strings; TXT record for the service
106
129
max_renames: integer; maximum number of renames
107
130
rename_count: integer; counter so we only rename after collisions
108
131
a sensible number of times
132
group: D-Bus Entry Group
133
server: D-Bus Server
134
bus: dbus.SystemBus()
109
135
"""
110
136
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
111
type = None, port = None, TXT = None, domain = "",
112
host = "", max_renames = 32768):
137
servicetype = None, port = None, TXT = None,
138
domain = u"", host = u"", max_renames = 32768,
139
protocol = avahi.PROTO_UNSPEC, bus = None):
113
140
self.interface = interface
114
141
self.name = name
115
self.type = type
142
self.type = servicetype
116
143
self.port = port
117
if TXT is None:
118
self.TXT = []
119
else:
120
self.TXT = TXT
144
self.TXT = TXT if TXT is not None else []
121
145
self.domain = domain
122
146
self.host = host
123
147
self.rename_count = 0
124
148
self.max_renames = max_renames
149
self.protocol = protocol
150
self.group = None # our entry group
151
self.server = None
152
self.bus = bus
125
153
def rename(self):
126
154
"""Derived from the Avahi example code"""
127
155
if self.rename_count >= self.max_renames:
128
156
logger.critical(u"No suitable Zeroconf service name found"
129
157
u" after %i retries, exiting.",
130
rename_count)
131
raise AvahiServiceError("Too many renames")
132
self.name = server.GetAlternativeServiceName(self.name)
158
self.rename_count)
159
raise AvahiServiceError(u"Too many renames")
160
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
133
161
logger.info(u"Changing Zeroconf service name to %r ...",
134
str(self.name))
135
syslogger.setFormatter(logging.Formatter\
136
('Mandos (%s): %%(levelname)s:'
137
' %%(message)s' % self.name))
162
self.name)
163
syslogger.setFormatter(logging.Formatter
164
(u'Mandos (%s) [%%(process)d]:'
165
u' %%(levelname)s: %%(message)s'
166
% self.name))
138
167
self.remove()
139
self.add()
168
try:
169
self.add()
170
except dbus.exceptions.DBusException, error:
171
logger.critical(u"DBusException: %s", error)
172
self.cleanup()
173
os._exit(1)
140
174
self.rename_count += 1
141
175
def remove(self):
142
176
"""Derived from the Avahi example code"""
143
if group is not None:
144
group.Reset()
177
if self.group is not None:
178
self.group.Reset()
145
179
def add(self):
146
180
"""Derived from the Avahi example code"""
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)
181
if self.group is None:
182
self.group = dbus.Interface(
183
self.bus.get_object(avahi.DBUS_NAME,
184
self.server.EntryGroupNew()),
185
avahi.DBUS_INTERFACE_ENTRY_GROUP)
186
self.group.connect_to_signal('StateChanged',
187
self
188
.entry_group_state_changed)
155
189
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
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
190
self.name, self.type)
191
self.group.AddService(
192
self.interface,
193
self.protocol,
194
dbus.UInt32(0), # flags
195
self.name, self.type,
196
self.domain, self.host,
197
dbus.UInt16(self.port),
198
avahi.string_array_to_txt_array(self.TXT))
199
self.group.Commit()
200
def entry_group_state_changed(self, state, error):
201
"""Derived from the Avahi example code"""
202
logger.debug(u"Avahi entry group state change: %i", state)
203
204
if state == avahi.ENTRY_GROUP_ESTABLISHED:
205
logger.debug(u"Zeroconf service established.")
206
elif state == avahi.ENTRY_GROUP_COLLISION:
207
logger.warning(u"Zeroconf service name collision.")
208
self.rename()
209
elif state == avahi.ENTRY_GROUP_FAILURE:
210
logger.critical(u"Avahi: Error in group state changed %s",
211
unicode(error))
212
raise AvahiGroupError(u"State changed: %s"
213
% unicode(error))
214
def cleanup(self):
215
"""Derived from the Avahi example code"""
216
if self.group is not None:
217
self.group.Free()
218
self.group = None
219
def server_state_changed(self, state):
220
"""Derived from the Avahi example code"""
221
logger.debug(u"Avahi server state change: %i", state)
222
if state == avahi.SERVER_COLLISION:
223
logger.error(u"Zeroconf server name collision")
224
self.remove()
225
elif state == avahi.SERVER_RUNNING:
226
self.add()
227
def activate(self):
228
"""Derived from the Avahi example code"""
229
if self.server is None:
230
self.server = dbus.Interface(
231
self.bus.get_object(avahi.DBUS_NAME,
232
avahi.DBUS_PATH_SERVER),
233
avahi.DBUS_INTERFACE_SERVER)
234
self.server.connect_to_signal(u"StateChanged",
235
self.server_state_changed)
236
self.server_state_changed(self.server.GetState())
170
237
171
238
172
239
class Client(object):
173
240
"""A representation of a client host served by this server.
241
174
242
Attributes:
175
name: string; from the config file, used in log messages
176
fingerprint: string (40 or 32 hexadecimal digits); used to
177
uniquely identify the client
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.
189
checker_initiator_tag: a gobject event source tag, or None
190
stop_initiator_tag: - '' -
243
_approved: bool(); 'None' if not yet approved/disapproved
244
approval_delay: datetime.timedelta(); Time to wait for approval
245
approval_duration: datetime.timedelta(); Duration of one approval
246
checker: subprocess.Popen(); a running checker process used
247
to see if the client lives.
248
'None' if no process is running.
191
249
checker_callback_tag: - '' -
192
checker_command: string; External command which is run to check if
193
client lives. %() expansions are done at
250
checker_command: string; External command which is run to check
251
if client lives. %() expansions are done at
194
252
runtime with vars(self) as dict, so that for
195
253
instance %(name)s can be used in the 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: - '' -
254
checker_initiator_tag: a gobject event source tag, or None
255
created: datetime.datetime(); (UTC) object creation
256
current_checker_command: string; current running checker_command
257
disable_hook: If set, called by disable() as disable_hook(self)
258
disable_initiator_tag: - '' -
259
enabled: bool()
260
fingerprint: string (40 or 32 hexadecimal digits); used to
261
uniquely identify the client
262
host: string; available for use by the checker command
263
interval: datetime.timedelta(); How often to start a new checker
264
last_checked_ok: datetime.datetime(); (UTC) or None
265
last_enabled: datetime.datetime(); (UTC)
266
name: string; from the config file, used in log messages and
267
D-Bus identifiers
268
secret: bytestring; sent verbatim (over TLS) to client
269
timeout: datetime.timedelta(); How long from last_checked_ok
270
until this client is disabled
271
runtime_expansions: Allowed attributes for runtime expansion.
201
272
"""
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={}):
273
274
runtime_expansions = (u"approval_delay", u"approval_duration",
275
u"created", u"enabled", u"fingerprint",
276
u"host", u"interval", u"last_checked_ok",
277
u"last_enabled", u"name", u"timeout")
278
279
@staticmethod
280
def _timedelta_to_milliseconds(td):
281
"Convert a datetime.timedelta() to milliseconds"
282
return ((td.days * 24 * 60 * 60 * 1000)
283
+ (td.seconds * 1000)
284
+ (td.microseconds // 1000))
285
286
def timeout_milliseconds(self):
287
"Return the 'timeout' attribute in milliseconds"
288
return self._timedelta_to_milliseconds(self.timeout)
289
290
def interval_milliseconds(self):
291
"Return the 'interval' attribute in milliseconds"
292
return self._timedelta_to_milliseconds(self.interval)
293
294
def approval_delay_milliseconds(self):
295
return self._timedelta_to_milliseconds(self.approval_delay)
296
297
def __init__(self, name = None, disable_hook=None, config=None):
226
298
"""Note: the 'checker' key in 'config' sets the
227
299
'checker_command' attribute and *not* the 'checker'
228
300
attribute."""
229
301
self.name = name
302
if config is None:
303
config = {}
230
304
logger.debug(u"Creating client %r", self.name)
231
305
# Uppercase and remove spaces from fingerprint for later
232
306
# comparison purposes with return value from the fingerprint()
233
307
# function
234
self.fingerprint = config["fingerprint"].upper()\
235
.replace(u" ", u"")
308
self.fingerprint = (config[u"fingerprint"].upper()
309
.replace(u" ", u""))
236
310
logger.debug(u" Fingerprint: %s", self.fingerprint)
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()
311
if u"secret" in config:
312
self.secret = config[u"secret"].decode(u"base64")
313
elif u"secfile" in config:
314
with open(os.path.expanduser(os.path.expandvars
315
(config[u"secfile"])),
316
"rb") as secfile:
317
self.secret = secfile.read()
243
318
else:
244
319
raise TypeError(u"No secret or secfile for client %s"
245
320
% self.name)
246
self.host = config.get("host", "")
247
self.created = datetime.datetime.now()
321
self.host = config.get(u"host", u"")
322
self.created = datetime.datetime.utcnow()
323
self.enabled = False
324
self.last_enabled = None
248
325
self.last_checked_ok = None
249
self.timeout = string_to_delta(config["timeout"])
250
self.interval = string_to_delta(config["interval"])
251
self.stop_hook = stop_hook
326
self.timeout = string_to_delta(config[u"timeout"])
327
self.interval = string_to_delta(config[u"interval"])
328
self.disable_hook = disable_hook
252
329
self.checker = None
253
330
self.checker_initiator_tag = None
254
self.stop_initiator_tag = None
331
self.disable_initiator_tag = None
255
332
self.checker_callback_tag = None
256
self.check_command = config["checker"]
257
def start(self):
333
self.checker_command = config[u"checker"]
334
self.current_checker_command = None
335
self.last_connect = None
336
self._approved = None
337
self.approved_by_default = config.get(u"approved_by_default",
338
True)
339
self.approvals_pending = 0
340
self.approval_delay = string_to_delta(
341
config[u"approval_delay"])
342
self.approval_duration = string_to_delta(
343
config[u"approval_duration"])
344
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
345
346
def send_changedstate(self):
347
self.changedstate.acquire()
348
self.changedstate.notify_all()
349
self.changedstate.release()
350
351
def enable(self):
258
352
"""Start this client's checker and timeout hooks"""
353
if getattr(self, u"enabled", False):
354
# Already enabled
355
return
356
self.send_changedstate()
357
self.last_enabled = datetime.datetime.utcnow()
259
358
# Schedule a new checker to be started an 'interval' from now,
260
359
# and every interval from then on.
261
self.checker_initiator_tag = gobject.timeout_add\
262
(self._interval_milliseconds,
263
self.start_checker)
360
self.checker_initiator_tag = (gobject.timeout_add
361
(self.interval_milliseconds(),
362
self.start_checker))
363
# Schedule a disable() when 'timeout' has passed
364
self.disable_initiator_tag = (gobject.timeout_add
365
(self.timeout_milliseconds(),
366
self.disable))
367
self.enabled = True
264
368
# Also start a new checker *right now*.
265
369
self.start_checker()
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:
370
371
def disable(self, quiet=True):
372
"""Disable this client."""
373
if not getattr(self, "enabled", False):
279
374
return 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):
375
if not quiet:
376
self.send_changedstate()
377
if not quiet:
378
logger.info(u"Disabling client %s", self.name)
379
if getattr(self, u"disable_initiator_tag", False):
380
gobject.source_remove(self.disable_initiator_tag)
381
self.disable_initiator_tag = None
382
if getattr(self, u"checker_initiator_tag", False):
284
383
gobject.source_remove(self.checker_initiator_tag)
285
384
self.checker_initiator_tag = None
286
385
self.stop_checker()
287
if self.stop_hook:
288
self.stop_hook(self)
386
if self.disable_hook:
387
self.disable_hook(self)
388
self.enabled = False
289
389
# Do not run this again if called by a gobject.timeout_add
290
390
return False
391
291
392
def __del__(self):
292
self.stop_hook = None
293
self.stop()
294
def checker_callback(self, pid, condition):
393
self.disable_hook = None
394
self.disable()
395
396
def checker_callback(self, pid, condition, command):
295
397
"""The checker has completed, so take appropriate actions."""
296
now = datetime.datetime.now()
297
398
self.checker_callback_tag = None
298
399
self.checker = None
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):
400
if os.WIFEXITED(condition):
401
exitstatus = os.WEXITSTATUS(condition)
402
if exitstatus == 0:
403
logger.info(u"Checker for %(name)s succeeded",
404
vars(self))
405
self.checked_ok()
406
else:
407
logger.info(u"Checker for %(name)s failed",
408
vars(self))
409
else:
309
410
logger.warning(u"Checker for %(name)s crashed?",
310
411
vars(self))
311
else:
312
logger.info(u"Checker for %(name)s failed",
313
vars(self))
412
413
def checked_ok(self):
414
"""Bump up the timeout for this client.
415
416
This should only be called when the client has been seen,
417
alive and well.
418
"""
419
self.last_checked_ok = datetime.datetime.utcnow()
420
gobject.source_remove(self.disable_initiator_tag)
421
self.disable_initiator_tag = (gobject.timeout_add
422
(self.timeout_milliseconds(),
423
self.disable))
424
314
425
def start_checker(self):
315
426
"""Start a new checker subprocess if one is not running.
427
316
428
If a checker already exists, leave it running and do
317
429
nothing."""
318
430
# The reason for not killing a running checker is that if we
321
433
# client would inevitably timeout, since no checker would get
322
434
# a chance to run to completion. If we instead leave running
323
435
# checkers alone, the checker would have to take more time
324
# than 'timeout' for the client to be declared invalid, which
325
# is as it should be.
436
# than 'timeout' for the client to be disabled, which is as it
437
# should be.
438
439
# If a checker exists, make sure it is not a zombie
440
try:
441
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
442
except (AttributeError, OSError), error:
443
if (isinstance(error, OSError)
444
and error.errno != errno.ECHILD):
445
raise error
446
else:
447
if pid:
448
logger.warning(u"Checker was a zombie")
449
gobject.source_remove(self.checker_callback_tag)
450
self.checker_callback(pid, status,
451
self.current_checker_command)
452
# Start a new checker if needed
326
453
if self.checker is None:
327
454
try:
328
# In case check_command has exactly one % operator
329
command = self.check_command % self.host
455
# In case checker_command has exactly one % operator
456
command = self.checker_command % self.host
330
457
except TypeError:
331
458
# Escape attributes for the shell
332
escaped_attrs = dict((key, re.escape(str(val)))
333
for key, val in
334
vars(self).iteritems())
459
escaped_attrs = dict(
460
(attr,
461
re.escape(unicode(str(getattr(self, attr, u"")),
462
errors=
463
u'replace')))
464
for attr in
465
self.runtime_expansions)
466
335
467
try:
336
command = self.check_command % escaped_attrs
468
command = self.checker_command % escaped_attrs
337
469
except TypeError, error:
338
470
logger.error(u'Could not format string "%s":'
339
u' %s', self.check_command, error)
471
u' %s', self.checker_command, error)
340
472
return True # Try again later
473
self.current_checker_command = command
341
474
try:
342
475
logger.info(u"Starting checker %r for %s",
343
476
command, self.name)
347
480
# always replaced by /dev/null.)
348
481
self.checker = subprocess.Popen(command,
349
482
close_fds=True,
350
shell=True, cwd="/")
351
self.checker_callback_tag = gobject.child_watch_add\
352
(self.checker.pid,
353
self.checker_callback)
483
shell=True, cwd=u"/")
484
self.checker_callback_tag = (gobject.child_watch_add
485
(self.checker.pid,
486
self.checker_callback,
487
data=command))
488
# The checker may have completed before the gobject
489
# watch was added. Check for this.
490
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
491
if pid:
492
gobject.source_remove(self.checker_callback_tag)
493
self.checker_callback(pid, status, command)
354
494
except OSError, error:
355
495
logger.error(u"Failed to start subprocess: %s",
356
496
error)
357
497
# Re-run this periodically if run by gobject.timeout_add
358
498
return True
499
359
500
def stop_checker(self):
360
501
"""Force the checker process, if any, to stop."""
361
502
if self.checker_callback_tag:
362
503
gobject.source_remove(self.checker_callback_tag)
363
504
self.checker_callback_tag = None
364
if getattr(self, "checker", None) is None:
505
if getattr(self, u"checker", None) is None:
365
506
return
366
507
logger.debug(u"Stopping checker for %(name)s", vars(self))
367
508
try:
368
509
os.kill(self.checker.pid, signal.SIGTERM)
369
#os.sleep(0.5)
510
#time.sleep(0.5)
370
511
#if self.checker.poll() is None:
371
512
# os.kill(self.checker.pid, signal.SIGKILL)
372
513
except OSError, error:
373
514
if error.errno != errno.ESRCH: # No such process
374
515
raise
375
516
self.checker = None
376
def still_valid(self):
377
"""Has the timeout not yet passed for this client?"""
378
now = datetime.datetime.now()
517
518
def dbus_service_property(dbus_interface, signature=u"v",
519
access=u"readwrite", byte_arrays=False):
520
"""Decorators for marking methods of a DBusObjectWithProperties to
521
become properties on the D-Bus.
522
523
The decorated method will be called with no arguments by "Get"
524
and with one argument by "Set".
525
526
The parameters, where they are supported, are the same as
527
dbus.service.method, except there is only "signature", since the
528
type from Get() and the type sent to Set() is the same.
529
"""
530
# Encoding deeply encoded byte arrays is not supported yet by the
531
# "Set" method, so we fail early here:
532
if byte_arrays and signature != u"ay":
533
raise ValueError(u"Byte arrays not supported for non-'ay'"
534
u" signature %r" % signature)
535
def decorator(func):
536
func._dbus_is_property = True
537
func._dbus_interface = dbus_interface
538
func._dbus_signature = signature
539
func._dbus_access = access
540
func._dbus_name = func.__name__
541
if func._dbus_name.endswith(u"_dbus_property"):
542
func._dbus_name = func._dbus_name[:-14]
543
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
544
return func
545
return decorator
546
547
548
class DBusPropertyException(dbus.exceptions.DBusException):
549
"""A base class for D-Bus property-related exceptions
550
"""
551
def __unicode__(self):
552
return unicode(str(self))
553
554
555
class DBusPropertyAccessException(DBusPropertyException):
556
"""A property's access permissions disallows an operation.
557
"""
558
pass
559
560
561
class DBusPropertyNotFound(DBusPropertyException):
562
"""An attempt was made to access a non-existing property.
563
"""
564
pass
565
566
567
class DBusObjectWithProperties(dbus.service.Object):
568
"""A D-Bus object with properties.
569
570
Classes inheriting from this can use the dbus_service_property
571
decorator to expose methods as D-Bus properties. It exposes the
572
standard Get(), Set(), and GetAll() methods on the D-Bus.
573
"""
574
575
@staticmethod
576
def _is_dbus_property(obj):
577
return getattr(obj, u"_dbus_is_property", False)
578
579
def _get_all_dbus_properties(self):
580
"""Returns a generator of (name, attribute) pairs
581
"""
582
return ((prop._dbus_name, prop)
583
for name, prop in
584
inspect.getmembers(self, self._is_dbus_property))
585
586
def _get_dbus_property(self, interface_name, property_name):
587
"""Returns a bound method if one exists which is a D-Bus
588
property with the specified name and interface.
589
"""
590
for name in (property_name,
591
property_name + u"_dbus_property"):
592
prop = getattr(self, name, None)
593
if (prop is None
594
or not self._is_dbus_property(prop)
595
or prop._dbus_name != property_name
596
or (interface_name and prop._dbus_interface
597
and interface_name != prop._dbus_interface)):
598
continue
599
return prop
600
# No such property
601
raise DBusPropertyNotFound(self.dbus_object_path + u":"
602
+ interface_name + u"."
603
+ property_name)
604
605
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
606
out_signature=u"v")
607
def Get(self, interface_name, property_name):
608
"""Standard D-Bus property Get() method, see D-Bus standard.
609
"""
610
prop = self._get_dbus_property(interface_name, property_name)
611
if prop._dbus_access == u"write":
612
raise DBusPropertyAccessException(property_name)
613
value = prop()
614
if not hasattr(value, u"variant_level"):
615
return value
616
return type(value)(value, variant_level=value.variant_level+1)
617
618
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
619
def Set(self, interface_name, property_name, value):
620
"""Standard D-Bus property Set() method, see D-Bus standard.
621
"""
622
prop = self._get_dbus_property(interface_name, property_name)
623
if prop._dbus_access == u"read":
624
raise DBusPropertyAccessException(property_name)
625
if prop._dbus_get_args_options[u"byte_arrays"]:
626
# The byte_arrays option is not supported yet on
627
# signatures other than "ay".
628
if prop._dbus_signature != u"ay":
629
raise ValueError
630
value = dbus.ByteArray(''.join(unichr(byte)
631
for byte in value))
632
prop(value)
633
634
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
635
out_signature=u"a{sv}")
636
def GetAll(self, interface_name):
637
"""Standard D-Bus property GetAll() method, see D-Bus
638
standard.
639
640
Note: Will not include properties with access="write".
641
"""
642
all = {}
643
for name, prop in self._get_all_dbus_properties():
644
if (interface_name
645
and interface_name != prop._dbus_interface):
646
# Interface non-empty but did not match
647
continue
648
# Ignore write-only properties
649
if prop._dbus_access == u"write":
650
continue
651
value = prop()
652
if not hasattr(value, u"variant_level"):
653
all[name] = value
654
continue
655
all[name] = type(value)(value, variant_level=
656
value.variant_level+1)
657
return dbus.Dictionary(all, signature=u"sv")
658
659
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
660
out_signature=u"s",
661
path_keyword='object_path',
662
connection_keyword='connection')
663
def Introspect(self, object_path, connection):
664
"""Standard D-Bus method, overloaded to insert property tags.
665
"""
666
xmlstring = dbus.service.Object.Introspect(self, object_path,
667
connection)
668
try:
669
document = xml.dom.minidom.parseString(xmlstring)
670
def make_tag(document, name, prop):
671
e = document.createElement(u"property")
672
e.setAttribute(u"name", name)
673
e.setAttribute(u"type", prop._dbus_signature)
674
e.setAttribute(u"access", prop._dbus_access)
675
return e
676
for if_tag in document.getElementsByTagName(u"interface"):
677
for tag in (make_tag(document, name, prop)
678
for name, prop
679
in self._get_all_dbus_properties()
680
if prop._dbus_interface
681
== if_tag.getAttribute(u"name")):
682
if_tag.appendChild(tag)
683
# Add the names to the return values for the
684
# "org.freedesktop.DBus.Properties" methods
685
if (if_tag.getAttribute(u"name")
686
== u"org.freedesktop.DBus.Properties"):
687
for cn in if_tag.getElementsByTagName(u"method"):
688
if cn.getAttribute(u"name") == u"Get":
689
for arg in cn.getElementsByTagName(u"arg"):
690
if (arg.getAttribute(u"direction")
691
== u"out"):
692
arg.setAttribute(u"name", u"value")
693
elif cn.getAttribute(u"name") == u"GetAll":
694
for arg in cn.getElementsByTagName(u"arg"):
695
if (arg.getAttribute(u"direction")
696
== u"out"):
697
arg.setAttribute(u"name", u"props")
698
xmlstring = document.toxml(u"utf-8")
699
document.unlink()
700
except (AttributeError, xml.dom.DOMException,
701
xml.parsers.expat.ExpatError), error:
702
logger.error(u"Failed to override Introspection method",
703
error)
704
return xmlstring
705
706
707
class ClientDBus(Client, DBusObjectWithProperties):
708
"""A Client class using D-Bus
709
710
Attributes:
711
dbus_object_path: dbus.ObjectPath
712
bus: dbus.SystemBus()
713
"""
714
715
runtime_expansions = (Client.runtime_expansions
716
+ (u"dbus_object_path",))
717
718
# dbus.service.Object doesn't use super(), so we can't either.
719
720
def __init__(self, bus = None, *args, **kwargs):
721
self._approvals_pending = 0
722
self.bus = bus
723
Client.__init__(self, *args, **kwargs)
724
# Only now, when this client is initialized, can it show up on
725
# the D-Bus
726
self.dbus_object_path = (dbus.ObjectPath
727
(u"/clients/"
728
+ self.name.replace(u".", u"_")))
729
DBusObjectWithProperties.__init__(self, self.bus,
730
self.dbus_object_path)
731
732
def _get_approvals_pending(self):
733
return self._approvals_pending
734
def _set_approvals_pending(self, value):
735
old_value = self._approvals_pending
736
self._approvals_pending = value
737
bval = bool(value)
738
if (hasattr(self, "dbus_object_path")
739
and bval is not bool(old_value)):
740
dbus_bool = dbus.Boolean(bval, variant_level=1)
741
self.PropertyChanged(dbus.String(u"ApprovalPending"),
742
dbus_bool)
743
744
approvals_pending = property(_get_approvals_pending,
745
_set_approvals_pending)
746
del _get_approvals_pending, _set_approvals_pending
747
748
@staticmethod
749
def _datetime_to_dbus(dt, variant_level=0):
750
"""Convert a UTC datetime.datetime() to a D-Bus type."""
751
return dbus.String(dt.isoformat(),
752
variant_level=variant_level)
753
754
def enable(self):
755
oldstate = getattr(self, u"enabled", False)
756
r = Client.enable(self)
757
if oldstate != self.enabled:
758
# Emit D-Bus signals
759
self.PropertyChanged(dbus.String(u"Enabled"),
760
dbus.Boolean(True, variant_level=1))
761
self.PropertyChanged(
762
dbus.String(u"LastEnabled"),
763
self._datetime_to_dbus(self.last_enabled,
764
variant_level=1))
765
return r
766
767
def disable(self, quiet = False):
768
oldstate = getattr(self, u"enabled", False)
769
r = Client.disable(self, quiet=quiet)
770
if not quiet and oldstate != self.enabled:
771
# Emit D-Bus signal
772
self.PropertyChanged(dbus.String(u"Enabled"),
773
dbus.Boolean(False, variant_level=1))
774
return r
775
776
def __del__(self, *args, **kwargs):
777
try:
778
self.remove_from_connection()
779
except LookupError:
780
pass
781
if hasattr(DBusObjectWithProperties, u"__del__"):
782
DBusObjectWithProperties.__del__(self, *args, **kwargs)
783
Client.__del__(self, *args, **kwargs)
784
785
def checker_callback(self, pid, condition, command,
786
*args, **kwargs):
787
self.checker_callback_tag = None
788
self.checker = None
789
# Emit D-Bus signal
790
self.PropertyChanged(dbus.String(u"CheckerRunning"),
791
dbus.Boolean(False, variant_level=1))
792
if os.WIFEXITED(condition):
793
exitstatus = os.WEXITSTATUS(condition)
794
# Emit D-Bus signal
795
self.CheckerCompleted(dbus.Int16(exitstatus),
796
dbus.Int64(condition),
797
dbus.String(command))
798
else:
799
# Emit D-Bus signal
800
self.CheckerCompleted(dbus.Int16(-1),
801
dbus.Int64(condition),
802
dbus.String(command))
803
804
return Client.checker_callback(self, pid, condition, command,
805
*args, **kwargs)
806
807
def checked_ok(self, *args, **kwargs):
808
r = Client.checked_ok(self, *args, **kwargs)
809
# Emit D-Bus signal
810
self.PropertyChanged(
811
dbus.String(u"LastCheckedOK"),
812
(self._datetime_to_dbus(self.last_checked_ok,
813
variant_level=1)))
814
return r
815
816
def start_checker(self, *args, **kwargs):
817
old_checker = self.checker
818
if self.checker is not None:
819
old_checker_pid = self.checker.pid
820
else:
821
old_checker_pid = None
822
r = Client.start_checker(self, *args, **kwargs)
823
# Only if new checker process was started
824
if (self.checker is not None
825
and old_checker_pid != self.checker.pid):
826
# Emit D-Bus signal
827
self.CheckerStarted(self.current_checker_command)
828
self.PropertyChanged(
829
dbus.String(u"CheckerRunning"),
830
dbus.Boolean(True, variant_level=1))
831
return r
832
833
def stop_checker(self, *args, **kwargs):
834
old_checker = getattr(self, u"checker", None)
835
r = Client.stop_checker(self, *args, **kwargs)
836
if (old_checker is not None
837
and getattr(self, u"checker", None) is None):
838
self.PropertyChanged(dbus.String(u"CheckerRunning"),
839
dbus.Boolean(False, variant_level=1))
840
return r
841
842
def _reset_approved(self):
843
self._approved = None
844
return False
845
846
def approve(self, value=True):
847
self.send_changedstate()
848
self._approved = value
849
gobject.timeout_add(self._timedelta_to_milliseconds
850
(self.approval_duration),
851
self._reset_approved)
852
853
854
## D-Bus methods, signals & properties
855
_interface = u"se.bsnet.fukt.Mandos.Client"
856
857
## Signals
858
859
# CheckerCompleted - signal
860
@dbus.service.signal(_interface, signature=u"nxs")
861
def CheckerCompleted(self, exitcode, waitstatus, command):
862
"D-Bus signal"
863
pass
864
865
# CheckerStarted - signal
866
@dbus.service.signal(_interface, signature=u"s")
867
def CheckerStarted(self, command):
868
"D-Bus signal"
869
pass
870
871
# PropertyChanged - signal
872
@dbus.service.signal(_interface, signature=u"sv")
873
def PropertyChanged(self, property, value):
874
"D-Bus signal"
875
pass
876
877
# GotSecret - signal
878
@dbus.service.signal(_interface)
879
def GotSecret(self):
880
"""D-Bus signal
881
Is sent after a successful transfer of secret from the Mandos
882
server to mandos-client
883
"""
884
pass
885
886
# Rejected - signal
887
@dbus.service.signal(_interface, signature=u"s")
888
def Rejected(self, reason):
889
"D-Bus signal"
890
pass
891
892
# NeedApproval - signal
893
@dbus.service.signal(_interface, signature=u"tb")
894
def NeedApproval(self, timeout, default):
895
"D-Bus signal"
896
pass
897
898
## Methods
899
900
# Approve - method
901
@dbus.service.method(_interface, in_signature=u"b")
902
def Approve(self, value):
903
self.approve(value)
904
905
# CheckedOK - method
906
@dbus.service.method(_interface)
907
def CheckedOK(self):
908
return self.checked_ok()
909
910
# Enable - method
911
@dbus.service.method(_interface)
912
def Enable(self):
913
"D-Bus method"
914
self.enable()
915
916
# StartChecker - method
917
@dbus.service.method(_interface)
918
def StartChecker(self):
919
"D-Bus method"
920
self.start_checker()
921
922
# Disable - method
923
@dbus.service.method(_interface)
924
def Disable(self):
925
"D-Bus method"
926
self.disable()
927
928
# StopChecker - method
929
@dbus.service.method(_interface)
930
def StopChecker(self):
931
self.stop_checker()
932
933
## Properties
934
935
# ApprovalPending - property
936
@dbus_service_property(_interface, signature=u"b", access=u"read")
937
def ApprovalPending_dbus_property(self):
938
return dbus.Boolean(bool(self.approvals_pending))
939
940
# ApprovedByDefault - property
941
@dbus_service_property(_interface, signature=u"b",
942
access=u"readwrite")
943
def ApprovedByDefault_dbus_property(self, value=None):
944
if value is None: # get
945
return dbus.Boolean(self.approved_by_default)
946
self.approved_by_default = bool(value)
947
# Emit D-Bus signal
948
self.PropertyChanged(dbus.String(u"ApprovedByDefault"),
949
dbus.Boolean(value, variant_level=1))
950
951
# ApprovalDelay - property
952
@dbus_service_property(_interface, signature=u"t",
953
access=u"readwrite")
954
def ApprovalDelay_dbus_property(self, value=None):
955
if value is None: # get
956
return dbus.UInt64(self.approval_delay_milliseconds())
957
self.approval_delay = datetime.timedelta(0, 0, 0, value)
958
# Emit D-Bus signal
959
self.PropertyChanged(dbus.String(u"ApprovalDelay"),
960
dbus.UInt64(value, variant_level=1))
961
962
# ApprovalDuration - property
963
@dbus_service_property(_interface, signature=u"t",
964
access=u"readwrite")
965
def ApprovalDuration_dbus_property(self, value=None):
966
if value is None: # get
967
return dbus.UInt64(self._timedelta_to_milliseconds(
968
self.approval_duration))
969
self.approval_duration = datetime.timedelta(0, 0, 0, value)
970
# Emit D-Bus signal
971
self.PropertyChanged(dbus.String(u"ApprovalDuration"),
972
dbus.UInt64(value, variant_level=1))
973
974
# Name - property
975
@dbus_service_property(_interface, signature=u"s", access=u"read")
976
def Name_dbus_property(self):
977
return dbus.String(self.name)
978
979
# Fingerprint - property
980
@dbus_service_property(_interface, signature=u"s", access=u"read")
981
def Fingerprint_dbus_property(self):
982
return dbus.String(self.fingerprint)
983
984
# Host - property
985
@dbus_service_property(_interface, signature=u"s",
986
access=u"readwrite")
987
def Host_dbus_property(self, value=None):
988
if value is None: # get
989
return dbus.String(self.host)
990
self.host = value
991
# Emit D-Bus signal
992
self.PropertyChanged(dbus.String(u"Host"),
993
dbus.String(value, variant_level=1))
994
995
# Created - property
996
@dbus_service_property(_interface, signature=u"s", access=u"read")
997
def Created_dbus_property(self):
998
return dbus.String(self._datetime_to_dbus(self.created))
999
1000
# LastEnabled - property
1001
@dbus_service_property(_interface, signature=u"s", access=u"read")
1002
def LastEnabled_dbus_property(self):
1003
if self.last_enabled is None:
1004
return dbus.String(u"")
1005
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1006
1007
# Enabled - property
1008
@dbus_service_property(_interface, signature=u"b",
1009
access=u"readwrite")
1010
def Enabled_dbus_property(self, value=None):
1011
if value is None: # get
1012
return dbus.Boolean(self.enabled)
1013
if value:
1014
self.enable()
1015
else:
1016
self.disable()
1017
1018
# LastCheckedOK - property
1019
@dbus_service_property(_interface, signature=u"s",
1020
access=u"readwrite")
1021
def LastCheckedOK_dbus_property(self, value=None):
1022
if value is not None:
1023
self.checked_ok()
1024
return
379
1025
if self.last_checked_ok is None:
380
return now < (self.created + self.timeout)
381
else:
382
return now < (self.last_checked_ok + self.timeout)
383
384
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.
1026
return dbus.String(u"")
1027
return dbus.String(self._datetime_to_dbus(self
1028
.last_checked_ok))
1029
1030
# Timeout - property
1031
@dbus_service_property(_interface, signature=u"t",
1032
access=u"readwrite")
1033
def Timeout_dbus_property(self, value=None):
1034
if value is None: # get
1035
return dbus.UInt64(self.timeout_milliseconds())
1036
self.timeout = datetime.timedelta(0, 0, 0, value)
1037
# Emit D-Bus signal
1038
self.PropertyChanged(dbus.String(u"Timeout"),
1039
dbus.UInt64(value, variant_level=1))
1040
if getattr(self, u"disable_initiator_tag", None) is None:
1041
return
1042
# Reschedule timeout
1043
gobject.source_remove(self.disable_initiator_tag)
1044
self.disable_initiator_tag = None
1045
time_to_die = (self.
1046
_timedelta_to_milliseconds((self
1047
.last_checked_ok
1048
+ self.timeout)
1049
- datetime.datetime
1050
.utcnow()))
1051
if time_to_die <= 0:
1052
# The timeout has passed
1053
self.disable()
1054
else:
1055
self.disable_initiator_tag = (gobject.timeout_add
1056
(time_to_die, self.disable))
1057
1058
# Interval - property
1059
@dbus_service_property(_interface, signature=u"t",
1060
access=u"readwrite")
1061
def Interval_dbus_property(self, value=None):
1062
if value is None: # get
1063
return dbus.UInt64(self.interval_milliseconds())
1064
self.interval = datetime.timedelta(0, 0, 0, value)
1065
# Emit D-Bus signal
1066
self.PropertyChanged(dbus.String(u"Interval"),
1067
dbus.UInt64(value, variant_level=1))
1068
if getattr(self, u"checker_initiator_tag", None) is None:
1069
return
1070
# Reschedule checker run
1071
gobject.source_remove(self.checker_initiator_tag)
1072
self.checker_initiator_tag = (gobject.timeout_add
1073
(value, self.start_checker))
1074
self.start_checker() # Start one now, too
1075
1076
# Checker - property
1077
@dbus_service_property(_interface, signature=u"s",
1078
access=u"readwrite")
1079
def Checker_dbus_property(self, value=None):
1080
if value is None: # get
1081
return dbus.String(self.checker_command)
1082
self.checker_command = value
1083
# Emit D-Bus signal
1084
self.PropertyChanged(dbus.String(u"Checker"),
1085
dbus.String(self.checker_command,
1086
variant_level=1))
1087
1088
# CheckerRunning - property
1089
@dbus_service_property(_interface, signature=u"b",
1090
access=u"readwrite")
1091
def CheckerRunning_dbus_property(self, value=None):
1092
if value is None: # get
1093
return dbus.Boolean(self.checker is not None)
1094
if value:
1095
self.start_checker()
1096
else:
1097
self.stop_checker()
1098
1099
# ObjectPath - property
1100
@dbus_service_property(_interface, signature=u"o", access=u"read")
1101
def ObjectPath_dbus_property(self):
1102
return self.dbus_object_path # is already a dbus.ObjectPath
1103
1104
# Secret = property
1105
@dbus_service_property(_interface, signature=u"ay",
1106
access=u"write", byte_arrays=True)
1107
def Secret_dbus_property(self, value):
1108
self.secret = str(value)
1109
1110
del _interface
1111
1112
1113
class ProxyClient(object):
1114
def __init__(self, child_pipe, fpr, address):
1115
self._pipe = child_pipe
1116
self._pipe.send(('init', fpr, address))
1117
if not self._pipe.recv():
1118
raise KeyError()
1119
1120
def __getattribute__(self, name):
1121
if(name == '_pipe'):
1122
return super(ProxyClient, self).__getattribute__(name)
1123
self._pipe.send(('getattr', name))
1124
data = self._pipe.recv()
1125
if data[0] == 'data':
1126
return data[1]
1127
if data[0] == 'function':
1128
def func(*args, **kwargs):
1129
self._pipe.send(('funcall', name, args, kwargs))
1130
return self._pipe.recv()[1]
1131
return func
1132
1133
def __setattr__(self, name, value):
1134
if(name == '_pipe'):
1135
return super(ProxyClient, self).__setattr__(name, value)
1136
self._pipe.send(('setattr', name, value))
1137
1138
1139
class ClientHandler(socketserver.BaseRequestHandler, object):
1140
"""A class to handle client connections.
1141
1142
Instantiated once for each connection to handle it.
442
1143
Note: This will run in its own forked process."""
443
1144
444
1145
def handle(self):
445
logger.info(u"TCP connection from: %s",
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.
1146
with contextlib.closing(self.server.child_pipe) as child_pipe:
1147
logger.info(u"TCP connection from: %s",
1148
unicode(self.client_address))
1149
logger.debug(u"Pipe FD: %d",
1150
self.server.child_pipe.fileno())
1151
1152
session = (gnutls.connection
1153
.ClientSession(self.request,
1154
gnutls.connection
1155
.X509Credentials()))
1156
1157
# Note: gnutls.connection.X509Credentials is really a
1158
# generic GnuTLS certificate credentials object so long as
1159
# no X.509 keys are added to it. Therefore, we can use it
1160
# here despite using OpenPGP certificates.
1161
1162
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1163
# u"+AES-256-CBC", u"+SHA1",
1164
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1165
# u"+DHE-DSS"))
1166
# Use a fallback default, since this MUST be set.
1167
priority = self.server.gnutls_priority
1168
if priority is None:
1169
priority = u"NORMAL"
1170
(gnutls.library.functions
1171
.gnutls_priority_set_direct(session._c_object,
1172
priority, None))
1173
1174
# Start communication using the Mandos protocol
1175
# Get protocol number
1176
line = self.request.makefile().readline()
1177
logger.debug(u"Protocol version: %r", line)
1178
try:
1179
if int(line.strip().split()[0]) > 1:
1180
raise RuntimeError
1181
except (ValueError, IndexError, RuntimeError), error:
1182
logger.error(u"Unknown protocol version: %s", error)
1183
return
1184
1185
# Start GnuTLS connection
1186
try:
1187
session.handshake()
1188
except gnutls.errors.GNUTLSError, error:
1189
logger.warning(u"Handshake failed: %s", error)
1190
# Do not run session.bye() here: the session is not
1191
# established. Just abandon the request.
1192
return
1193
logger.debug(u"Handshake succeeded")
1194
1195
approval_required = False
1196
try:
1197
try:
1198
fpr = self.fingerprint(self.peer_certificate
1199
(session))
1200
except (TypeError, gnutls.errors.GNUTLSError), error:
1201
logger.warning(u"Bad certificate: %s", error)
1202
return
1203
logger.debug(u"Fingerprint: %s", fpr)
1204
1205
try:
1206
client = ProxyClient(child_pipe, fpr,
1207
self.client_address)
1208
except KeyError:
1209
return
1210
1211
if client.approval_delay:
1212
delay = client.approval_delay
1213
client.approvals_pending += 1
1214
approval_required = True
1215
1216
while True:
1217
if not client.enabled:
1218
logger.warning(u"Client %s is disabled",
1219
client.name)
1220
if self.server.use_dbus:
1221
# Emit D-Bus signal
1222
client.Rejected("Disabled")
1223
return
1224
1225
if client._approved or not client.approval_delay:
1226
#We are approved or approval is disabled
1227
break
1228
elif client._approved is None:
1229
logger.info(u"Client %s needs approval",
1230
client.name)
1231
if self.server.use_dbus:
1232
# Emit D-Bus signal
1233
client.NeedApproval(
1234
client.approval_delay_milliseconds(),
1235
client.approved_by_default)
1236
else:
1237
logger.warning(u"Client %s was not approved",
1238
client.name)
1239
if self.server.use_dbus:
1240
# Emit D-Bus signal
1241
client.Rejected("Denied")
1242
return
1243
1244
#wait until timeout or approved
1245
#x = float(client._timedelta_to_milliseconds(delay))
1246
time = datetime.datetime.now()
1247
client.changedstate.acquire()
1248
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1249
client.changedstate.release()
1250
time2 = datetime.datetime.now()
1251
if (time2 - time) >= delay:
1252
if not client.approved_by_default:
1253
logger.warning("Client %s timed out while"
1254
" waiting for approval",
1255
client.name)
1256
if self.server.use_dbus:
1257
# Emit D-Bus signal
1258
client.Rejected("Approval timed out")
1259
return
1260
else:
1261
break
1262
else:
1263
delay -= time2 - time
1264
1265
sent_size = 0
1266
while sent_size < len(client.secret):
1267
try:
1268
sent = session.send(client.secret[sent_size:])
1269
except (gnutls.errors.GNUTLSError), error:
1270
logger.warning("gnutls send failed")
1271
return
1272
logger.debug(u"Sent: %d, remaining: %d",
1273
sent, len(client.secret)
1274
- (sent_size + sent))
1275
sent_size += sent
1276
1277
logger.info(u"Sending secret to %s", client.name)
1278
# bump the timeout as if seen
1279
client.checked_ok()
1280
if self.server.use_dbus:
1281
# Emit D-Bus signal
1282
client.GotSecret()
1283
1284
finally:
1285
if approval_required:
1286
client.approvals_pending -= 1
1287
try:
1288
session.bye()
1289
except (gnutls.errors.GNUTLSError), error:
1290
logger.warning("GnuTLS bye failed")
1291
1292
@staticmethod
1293
def peer_certificate(session):
1294
"Return the peer's OpenPGP certificate as a bytestring"
1295
# If not an OpenPGP certificate...
1296
if (gnutls.library.functions
1297
.gnutls_certificate_type_get(session._c_object)
1298
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1299
# ...do the normal thing
1300
return session.peer_certificate
1301
list_size = ctypes.c_uint(1)
1302
cert_list = (gnutls.library.functions
1303
.gnutls_certificate_get_peers
1304
(session._c_object, ctypes.byref(list_size)))
1305
if not bool(cert_list) and list_size.value != 0:
1306
raise gnutls.errors.GNUTLSError(u"error getting peer"
1307
u" certificate")
1308
if list_size.value == 0:
1309
return None
1310
cert = cert_list[0]
1311
return ctypes.string_at(cert.data, cert.size)
1312
1313
@staticmethod
1314
def fingerprint(openpgp):
1315
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1316
# New GnuTLS "datum" with the OpenPGP public key
1317
datum = (gnutls.library.types
1318
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1319
ctypes.POINTER
1320
(ctypes.c_ubyte)),
1321
ctypes.c_uint(len(openpgp))))
1322
# New empty GnuTLS certificate
1323
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1324
(gnutls.library.functions
1325
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1326
# Import the OpenPGP public key into the certificate
1327
(gnutls.library.functions
1328
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1329
gnutls.library.constants
1330
.GNUTLS_OPENPGP_FMT_RAW))
1331
# Verify the self signature in the key
1332
crtverify = ctypes.c_uint()
1333
(gnutls.library.functions
1334
.gnutls_openpgp_crt_verify_self(crt, 0,
1335
ctypes.byref(crtverify)))
1336
if crtverify.value != 0:
1337
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1338
raise (gnutls.errors.CertificateSecurityError
1339
(u"Verify failed"))
1340
# New buffer for the fingerprint
1341
buf = ctypes.create_string_buffer(20)
1342
buf_len = ctypes.c_size_t()
1343
# Get the fingerprint from the certificate into the buffer
1344
(gnutls.library.functions
1345
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1346
ctypes.byref(buf_len)))
1347
# Deinit the certificate
1348
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1349
# Convert the buffer to a Python bytestring
1350
fpr = ctypes.string_at(buf, buf_len.value)
1351
# Convert the bytestring to hexadecimal notation
1352
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1353
return hex_fpr
1354
1355
1356
class MultiprocessingMixIn(object):
1357
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1358
def sub_process_main(self, request, address):
1359
try:
1360
self.finish_request(request, address)
1361
except:
1362
self.handle_error(request, address)
1363
self.close_request(request)
1364
1365
def process_request(self, request, address):
1366
"""Start a new process to process the request."""
1367
multiprocessing.Process(target = self.sub_process_main,
1368
args = (request, address)).start()
1369
1370
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1371
""" adds a pipe to the MixIn """
1372
def process_request(self, request, client_address):
1373
"""Overrides and wraps the original process_request().
1374
1375
This function creates a new pipe in self.pipe
1376
"""
1377
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1378
1379
super(MultiprocessingMixInWithPipe,
1380
self).process_request(request, client_address)
1381
self.child_pipe.close()
1382
self.add_pipe(parent_pipe)
1383
1384
def add_pipe(self, parent_pipe):
1385
"""Dummy function; override as necessary"""
1386
pass
1387
1388
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1389
socketserver.TCPServer, object):
1390
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1391
518
1392
Attributes:
519
settings: Server settings
520
clients: Set() of Client objects
521
1393
enabled: Boolean; whether this server is activated yet
1394
interface: None or a network interface name (string)
1395
use_ipv6: Boolean; to use IPv6 or not
522
1396
"""
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)
1397
def __init__(self, server_address, RequestHandlerClass,
1398
interface=None, use_ipv6=True):
1399
self.interface = interface
1400
if use_ipv6:
1401
self.address_family = socket.AF_INET6
1402
socketserver.TCPServer.__init__(self, server_address,
1403
RequestHandlerClass)
533
1404
def server_bind(self):
534
1405
"""This overrides the normal server_bind() function
535
1406
to bind to an interface if one was specified, and also NOT to
536
1407
bind to an address or port if they were not specified."""
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
1408
if self.interface is not None:
1409
if SO_BINDTODEVICE is None:
1410
logger.error(u"SO_BINDTODEVICE does not exist;"
1411
u" cannot bind to interface %s",
1412
self.interface)
1413
else:
1414
try:
1415
self.socket.setsockopt(socket.SOL_SOCKET,
1416
SO_BINDTODEVICE,
1417
str(self.interface
1418
+ u'\0'))
1419
except socket.error, error:
1420
if error[0] == errno.EPERM:
1421
logger.error(u"No permission to"
1422
u" bind to interface %s",
1423
self.interface)
1424
elif error[0] == errno.ENOPROTOOPT:
1425
logger.error(u"SO_BINDTODEVICE not available;"
1426
u" cannot bind to interface %s",
1427
self.interface)
1428
else:
1429
raise
551
1430
# Only bind(2) the socket if we really need to.
552
1431
if self.server_address[0] or self.server_address[1]:
553
1432
if not self.server_address[0]:
554
in6addr_any = "::"
555
self.server_address = (in6addr_any,
1433
if self.address_family == socket.AF_INET6:
1434
any_address = u"::" # in6addr_any
1435
else:
1436
any_address = socket.INADDR_ANY
1437
self.server_address = (any_address,
556
1438
self.server_address[1])
557
1439
elif not self.server_address[1]:
558
1440
self.server_address = (self.server_address[0],
559
1441
0)
560
# if self.settings["interface"]:
1442
# if self.interface:
561
1443
# self.server_address = (self.server_address[0],
562
1444
# 0, # port
563
1445
# 0, # flowinfo
564
1446
# if_nametoindex
565
# (self.settings
566
# ["interface"]))
567
return super(type(self), self).server_bind()
1447
# (self.interface))
1448
return socketserver.TCPServer.server_bind(self)
1449
1450
1451
class MandosServer(IPv6_TCPServer):
1452
"""Mandos server.
1453
1454
Attributes:
1455
clients: set of Client objects
1456
gnutls_priority GnuTLS priority string
1457
use_dbus: Boolean; to emit D-Bus signals or not
1458
1459
Assumes a gobject.MainLoop event loop.
1460
"""
1461
def __init__(self, server_address, RequestHandlerClass,
1462
interface=None, use_ipv6=True, clients=None,
1463
gnutls_priority=None, use_dbus=True):
1464
self.enabled = False
1465
self.clients = clients
1466
if self.clients is None:
1467
self.clients = set()
1468
self.use_dbus = use_dbus
1469
self.gnutls_priority = gnutls_priority
1470
IPv6_TCPServer.__init__(self, server_address,
1471
RequestHandlerClass,
1472
interface = interface,
1473
use_ipv6 = use_ipv6)
568
1474
def server_activate(self):
569
1475
if self.enabled:
570
return super(type(self), self).server_activate()
1476
return socketserver.TCPServer.server_activate(self)
571
1477
def enable(self):
572
1478
self.enabled = True
1479
def add_pipe(self, parent_pipe):
1480
# Call "handle_ipc" for both data and EOF events
1481
gobject.io_add_watch(parent_pipe.fileno(),
1482
gobject.IO_IN | gobject.IO_HUP,
1483
functools.partial(self.handle_ipc,
1484
parent_pipe = parent_pipe))
1485
1486
def handle_ipc(self, source, condition, parent_pipe=None,
1487
client_object=None):
1488
condition_names = {
1489
gobject.IO_IN: u"IN", # There is data to read.
1490
gobject.IO_OUT: u"OUT", # Data can be written (without
1491
# blocking).
1492
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1493
gobject.IO_ERR: u"ERR", # Error condition.
1494
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1495
# broken, usually for pipes and
1496
# sockets).
1497
}
1498
conditions_string = ' | '.join(name
1499
for cond, name in
1500
condition_names.iteritems()
1501
if cond & condition)
1502
# error or the other end of multiprocessing.Pipe has closed
1503
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1504
return False
1505
1506
# Read a request from the child
1507
request = parent_pipe.recv()
1508
command = request[0]
1509
1510
if command == 'init':
1511
fpr = request[1]
1512
address = request[2]
1513
1514
for c in self.clients:
1515
if c.fingerprint == fpr:
1516
client = c
1517
break
1518
else:
1519
logger.warning(u"Client not found for fingerprint: %s, ad"
1520
u"dress: %s", fpr, address)
1521
if self.use_dbus:
1522
# Emit D-Bus signal
1523
mandos_dbus_service.ClientNotFound(fpr, address)
1524
parent_pipe.send(False)
1525
return False
1526
1527
gobject.io_add_watch(parent_pipe.fileno(),
1528
gobject.IO_IN | gobject.IO_HUP,
1529
functools.partial(self.handle_ipc,
1530
parent_pipe = parent_pipe,
1531
client_object = client))
1532
parent_pipe.send(True)
1533
# remove the old hook in favor of the new above hook on same fileno
1534
return False
1535
if command == 'funcall':
1536
funcname = request[1]
1537
args = request[2]
1538
kwargs = request[3]
1539
1540
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1541
1542
if command == 'getattr':
1543
attrname = request[1]
1544
if callable(client_object.__getattribute__(attrname)):
1545
parent_pipe.send(('function',))
1546
else:
1547
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1548
1549
if command == 'setattr':
1550
attrname = request[1]
1551
value = request[2]
1552
setattr(client_object, attrname, value)
1553
1554
return True
573
1555
574
1556
575
1557
def string_to_delta(interval):
576
1558
"""Parse a string and return a datetime.timedelta
577
578
>>> string_to_delta('7d')
1559
1560
>>> string_to_delta(u'7d')
579
1561
datetime.timedelta(7)
580
>>> string_to_delta('60s')
1562
>>> string_to_delta(u'60s')
581
1563
datetime.timedelta(0, 60)
582
>>> string_to_delta('60m')
1564
>>> string_to_delta(u'60m')
583
1565
datetime.timedelta(0, 3600)
584
>>> string_to_delta('24h')
1566
>>> string_to_delta(u'24h')
585
1567
datetime.timedelta(1)
586
1568
>>> string_to_delta(u'1w')
587
1569
datetime.timedelta(7)
588
>>> string_to_delta('5m 30s')
1570
>>> string_to_delta(u'5m 30s')
589
1571
datetime.timedelta(0, 330)
590
1572
"""
591
1573
timevalue = datetime.timedelta(0)
592
1574
for s in interval.split():
593
1575
try:
594
suffix=unicode(s[-1])
595
value=int(s[:-1])
1576
suffix = unicode(s[-1])
1577
value = int(s[:-1])
596
1578
if suffix == u"d":
597
1579
delta = datetime.timedelta(value)
598
1580
elif suffix == u"s":
604
1586
elif suffix == u"w":
605
1587
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
606
1588
else:
607
raise ValueError
608
except (ValueError, IndexError):
609
raise ValueError
1589
raise ValueError(u"Unknown suffix %r" % suffix)
1590
except (ValueError, IndexError), e:
1591
raise ValueError(e.message)
610
1592
timevalue += delta
611
1593
return timevalue
612
1594
613
1595
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
637
1596
def if_nametoindex(interface):
638
"""Call the C function if_nametoindex(), or equivalent"""
1597
"""Call the C function if_nametoindex(), or equivalent
1598
1599
Note: This function cannot accept a unicode string."""
639
1600
global if_nametoindex
640
1601
try:
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
1602
if_nametoindex = (ctypes.cdll.LoadLibrary
1603
(ctypes.util.find_library(u"c"))
1604
.if_nametoindex)
645
1605
except (OSError, AttributeError):
646
if "struct" not in sys.modules:
647
import struct
648
if "fcntl" not in sys.modules:
649
import fcntl
1606
logger.warning(u"Doing if_nametoindex the hard way")
650
1607
def if_nametoindex(interface):
651
1608
"Get an interface index the hard way, i.e. using fcntl()"
652
1609
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
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]
1610
with contextlib.closing(socket.socket()) as s:
1611
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1612
struct.pack(str(u"16s16x"),
1613
interface))
1614
interface_index = struct.unpack(str(u"I"),
1615
ifreq[16:20])[0]
658
1616
return interface_index
659
1617
return if_nametoindex(interface)
660
1618
661
1619
662
1620
def daemon(nochdir = False, noclose = False):
663
1621
"""See daemon(3). Standard BSD Unix function.
1622
664
1623
This should really exist as os.daemon, but it doesn't (yet)."""
665
1624
if os.fork():
666
1625
sys.exit()
667
1626
os.setsid()
668
1627
if not nochdir:
669
os.chdir("/")
1628
os.chdir(u"/")
670
1629
if os.fork():
671
1630
sys.exit()
672
1631
if not noclose:
674
1633
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
675
1634
if not stat.S_ISCHR(os.fstat(null).st_mode):
676
1635
raise OSError(errno.ENODEV,
677
"/dev/null not a character device")
1636
u"%s not a character device"
1637
% os.path.devnull)
678
1638
os.dup2(null, sys.stdin.fileno())
679
1639
os.dup2(null, sys.stdout.fileno())
680
1640
os.dup2(null, sys.stderr.fileno())
683
1643
684
1644
685
1645
def main():
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()
1646
1647
##################################################################
1648
# Parsing of options, both command line and config file
1649
1650
parser = optparse.OptionParser(version = "%%prog %s" % version)
1651
parser.add_option("-i", u"--interface", type=u"string",
1652
metavar="IF", help=u"Bind to interface IF")
1653
parser.add_option("-a", u"--address", type=u"string",
1654
help=u"Address to listen for requests on")
1655
parser.add_option("-p", u"--port", type=u"int",
1656
help=u"Port number to receive requests on")
1657
parser.add_option("--check", action=u"store_true",
1658
help=u"Run self-test")
1659
parser.add_option("--debug", action=u"store_true",
1660
help=u"Debug mode; run in foreground and log to"
1661
u" terminal")
1662
parser.add_option("--debuglevel", type=u"string", metavar="Level",
1663
help=u"Debug level for stdout output")
1664
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1665
u" priority string (see GnuTLS documentation)")
1666
parser.add_option("--servicename", type=u"string",
1667
metavar=u"NAME", help=u"Zeroconf service name")
1668
parser.add_option("--configdir", type=u"string",
1669
default=u"/etc/mandos", metavar=u"DIR",
1670
help=u"Directory to search for configuration"
1671
u" files")
1672
parser.add_option("--no-dbus", action=u"store_false",
1673
dest=u"use_dbus", help=u"Do not provide D-Bus"
1674
u" system bus interface")
1675
parser.add_option("--no-ipv6", action=u"store_false",
1676
dest=u"use_ipv6", help=u"Do not use IPv6")
1677
options = parser.parse_args()[0]
710
1678
711
1679
if options.check:
712
1680
import doctest
714
1682
sys.exit()
715
1683
716
1684
# Default values for config file for server-global settings
717
server_defaults = { "interface": "",
718
"address": "",
719
"port": "",
720
"debug": "False",
721
"priority":
722
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
723
"servicename": "Mandos",
1685
server_defaults = { u"interface": u"",
1686
u"address": u"",
1687
u"port": u"",
1688
u"debug": u"False",
1689
u"priority":
1690
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1691
u"servicename": u"Mandos",
1692
u"use_dbus": u"True",
1693
u"use_ipv6": u"True",
1694
u"debuglevel": u"",
724
1695
}
725
1696
726
1697
# Parse config file for server-global settings
727
server_config = ConfigParser.SafeConfigParser(server_defaults)
1698
server_config = configparser.SafeConfigParser(server_defaults)
728
1699
del server_defaults
729
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1700
server_config.read(os.path.join(options.configdir,
1701
u"mandos.conf"))
730
1702
# Convert the SafeConfigParser object to a dict
731
1703
server_settings = server_config.defaults()
732
# Use getboolean on the boolean config option
733
server_settings["debug"] = server_config.getboolean\
734
("DEFAULT", "debug")
1704
# Use the appropriate methods on the non-string config options
1705
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1706
server_settings[option] = server_config.getboolean(u"DEFAULT",
1707
option)
1708
if server_settings["port"]:
1709
server_settings["port"] = server_config.getint(u"DEFAULT",
1710
u"port")
735
1711
del server_config
736
1712
737
1713
# Override the settings from the config file with command line
738
1714
# options, if set.
739
for option in ("interface", "address", "port", "debug",
740
"priority", "servicename", "configdir"):
1715
for option in (u"interface", u"address", u"port", u"debug",
1716
u"priority", u"servicename", u"configdir",
1717
u"use_dbus", u"use_ipv6", u"debuglevel"):
741
1718
value = getattr(options, option)
742
1719
if value is not None:
743
1720
server_settings[option] = value
744
1721
del options
1722
# Force all strings to be unicode
1723
for option in server_settings.keys():
1724
if type(server_settings[option]) is str:
1725
server_settings[option] = unicode(server_settings[option])
745
1726
# Now we have our good server settings in "server_settings"
746
1727
747
debug = server_settings["debug"]
748
749
if not debug:
750
syslogger.setLevel(logging.WARNING)
751
console.setLevel(logging.WARNING)
752
753
if server_settings["servicename"] != "Mandos":
754
syslogger.setFormatter(logging.Formatter\
755
('Mandos (%s): %%(levelname)s:'
756
' %%(message)s'
757
% server_settings["servicename"]))
1728
##################################################################
1729
1730
# For convenience
1731
debug = server_settings[u"debug"]
1732
debuglevel = server_settings[u"debuglevel"]
1733
use_dbus = server_settings[u"use_dbus"]
1734
use_ipv6 = server_settings[u"use_ipv6"]
1735
1736
if server_settings[u"servicename"] != u"Mandos":
1737
syslogger.setFormatter(logging.Formatter
1738
(u'Mandos (%s) [%%(process)d]:'
1739
u' %%(levelname)s: %%(message)s'
1740
% server_settings[u"servicename"]))
758
1741
759
1742
# Parse config file with clients
760
client_defaults = { "timeout": "1h",
761
"interval": "5m",
762
"checker": "fping -q -- %(host)s",
763
"host": "",
1743
client_defaults = { u"timeout": u"1h",
1744
u"interval": u"5m",
1745
u"checker": u"fping -q -- %%(host)s",
1746
u"host": u"",
1747
u"approval_delay": u"0s",
1748
u"approval_duration": u"1s",
764
1749
}
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:
1750
client_config = configparser.SafeConfigParser(client_defaults)
1751
client_config.read(os.path.join(server_settings[u"configdir"],
1752
u"clients.conf"))
1753
1754
global mandos_dbus_service
1755
mandos_dbus_service = None
1756
1757
tcp_server = MandosServer((server_settings[u"address"],
1758
server_settings[u"port"]),
1759
ClientHandler,
1760
interface=(server_settings[u"interface"]
1761
or None),
1762
use_ipv6=use_ipv6,
1763
gnutls_priority=
1764
server_settings[u"priority"],
1765
use_dbus=use_dbus)
1766
pidfilename = u"/var/run/mandos.pid"
1767
try:
1768
pidfile = open(pidfilename, u"w")
1769
except IOError:
1770
logger.error(u"Could not open file %r", pidfilename)
1771
1772
try:
1773
uid = pwd.getpwnam(u"_mandos").pw_uid
1774
gid = pwd.getpwnam(u"_mandos").pw_gid
1775
except KeyError:
1776
try:
1777
uid = pwd.getpwnam(u"mandos").pw_uid
1778
gid = pwd.getpwnam(u"mandos").pw_gid
1779
except KeyError:
1780
try:
1781
uid = pwd.getpwnam(u"nobody").pw_uid
1782
gid = pwd.getpwnam(u"nobody").pw_gid
1783
except KeyError:
1784
uid = 65534
1785
gid = 65534
1786
try:
1787
os.setgid(gid)
798
1788
os.setuid(uid)
799
os.setgid(gid)
800
1789
except OSError, error:
801
1790
if error[0] != errno.EPERM:
802
1791
raise error
803
1792
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"])
1793
if not debug and not debuglevel:
1794
syslogger.setLevel(logging.WARNING)
1795
console.setLevel(logging.WARNING)
1796
if debuglevel:
1797
level = getattr(logging, debuglevel.upper())
1798
syslogger.setLevel(level)
1799
console.setLevel(level)
1800
1801
if debug:
1802
# Enable all possible GnuTLS debugging
1803
1804
# "Use a log level over 10 to enable all debugging options."
1805
# - GnuTLS manual
1806
gnutls.library.functions.gnutls_global_set_log_level(11)
1807
1808
@gnutls.library.types.gnutls_log_func
1809
def debug_gnutls(level, string):
1810
logger.debug(u"GnuTLS: %s", string[:-1])
1811
1812
(gnutls.library.functions
1813
.gnutls_global_set_log_function(debug_gnutls))
1814
1815
# Redirect stdin so all checkers get /dev/null
1816
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1817
os.dup2(null, sys.stdin.fileno())
1818
if null > 2:
1819
os.close(null)
1820
else:
1821
# No console logging
1822
logger.removeHandler(console)
1823
810
1824
811
1825
global main_loop
812
global bus
813
global server
814
1826
# From the Avahi example code
815
1827
DBusGMainLoop(set_as_default=True )
816
1828
main_loop = gobject.MainLoop()
817
1829
bus = dbus.SystemBus()
818
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
819
avahi.DBUS_PATH_SERVER),
820
avahi.DBUS_INTERFACE_SERVER)
821
1830
# End of Avahi example code
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()))
834
if not clients:
835
logger.critical(u"No clients defined")
836
sys.exit(1)
837
838
if debug:
839
# Redirect stdin so all checkers get /dev/null
840
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
841
os.dup2(null, sys.stdin.fileno())
842
if null > 2:
843
os.close(null)
844
else:
845
# No console logging
846
logger.removeHandler(console)
1831
if use_dbus:
1832
try:
1833
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1834
bus, do_not_queue=True)
1835
except dbus.exceptions.NameExistsException, e:
1836
logger.error(unicode(e) + u", disabling D-Bus")
1837
use_dbus = False
1838
server_settings[u"use_dbus"] = False
1839
tcp_server.use_dbus = False
1840
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1841
service = AvahiService(name = server_settings[u"servicename"],
1842
servicetype = u"_mandos._tcp",
1843
protocol = protocol, bus = bus)
1844
if server_settings["interface"]:
1845
service.interface = (if_nametoindex
1846
(str(server_settings[u"interface"])))
1847
1848
if not debug:
847
1849
# Close all input and output, do double fork, etc.
848
1850
daemon()
849
1851
1852
global multiprocessing_manager
1853
multiprocessing_manager = multiprocessing.Manager()
1854
1855
client_class = Client
1856
if use_dbus:
1857
client_class = functools.partial(ClientDBus, bus = bus)
1858
def client_config_items(config, section):
1859
special_settings = {
1860
"approved_by_default":
1861
lambda: config.getboolean(section,
1862
"approved_by_default"),
1863
}
1864
for name, value in config.items(section):
1865
try:
1866
yield (name, special_settings[name]())
1867
except KeyError:
1868
yield (name, value)
1869
1870
tcp_server.clients.update(set(
1871
client_class(name = section,
1872
config= dict(client_config_items(
1873
client_config, section)))
1874
for section in client_config.sections()))
1875
if not tcp_server.clients:
1876
logger.warning(u"No clients defined")
1877
850
1878
try:
851
pid = os.getpid()
852
pidfile.write(str(pid) + "\n")
853
pidfile.close()
1879
with pidfile:
1880
pid = os.getpid()
1881
pidfile.write(str(pid) + "\n")
854
1882
del pidfile
855
except IOError, err:
1883
except IOError:
856
1884
logger.error(u"Could not write to file %r with PID %d",
857
1885
pidfilename, pid)
858
1886
except NameError:
860
1888
pass
861
1889
del pidfilename
862
1890
1891
if not debug:
1892
signal.signal(signal.SIGINT, signal.SIG_IGN)
1893
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1894
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1895
1896
if use_dbus:
1897
class MandosDBusService(dbus.service.Object):
1898
"""A D-Bus proxy object"""
1899
def __init__(self):
1900
dbus.service.Object.__init__(self, bus, u"/")
1901
_interface = u"se.bsnet.fukt.Mandos"
1902
1903
@dbus.service.signal(_interface, signature=u"o")
1904
def ClientAdded(self, objpath):
1905
"D-Bus signal"
1906
pass
1907
1908
@dbus.service.signal(_interface, signature=u"ss")
1909
def ClientNotFound(self, fingerprint, address):
1910
"D-Bus signal"
1911
pass
1912
1913
@dbus.service.signal(_interface, signature=u"os")
1914
def ClientRemoved(self, objpath, name):
1915
"D-Bus signal"
1916
pass
1917
1918
@dbus.service.method(_interface, out_signature=u"ao")
1919
def GetAllClients(self):
1920
"D-Bus method"
1921
return dbus.Array(c.dbus_object_path
1922
for c in tcp_server.clients)
1923
1924
@dbus.service.method(_interface,
1925
out_signature=u"a{oa{sv}}")
1926
def GetAllClientsWithProperties(self):
1927
"D-Bus method"
1928
return dbus.Dictionary(
1929
((c.dbus_object_path, c.GetAll(u""))
1930
for c in tcp_server.clients),
1931
signature=u"oa{sv}")
1932
1933
@dbus.service.method(_interface, in_signature=u"o")
1934
def RemoveClient(self, object_path):
1935
"D-Bus method"
1936
for c in tcp_server.clients:
1937
if c.dbus_object_path == object_path:
1938
tcp_server.clients.remove(c)
1939
c.remove_from_connection()
1940
# Don't signal anything except ClientRemoved
1941
c.disable(quiet=True)
1942
# Emit D-Bus signal
1943
self.ClientRemoved(object_path, c.name)
1944
return
1945
raise KeyError(object_path)
1946
1947
del _interface
1948
1949
mandos_dbus_service = MandosDBusService()
1950
863
1951
def cleanup():
864
1952
"Cleanup function; run on exit"
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
1953
service.cleanup()
871
1954
872
while clients:
873
client = clients.pop()
874
client.stop_hook = None
875
client.stop()
1955
while tcp_server.clients:
1956
client = tcp_server.clients.pop()
1957
if use_dbus:
1958
client.remove_from_connection()
1959
client.disable_hook = None
1960
# Don't signal anything except ClientRemoved
1961
client.disable(quiet=True)
1962
if use_dbus:
1963
# Emit D-Bus signal
1964
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1965
client.name)
876
1966
877
1967
atexit.register(cleanup)
878
1968
879
if not debug:
880
signal.signal(signal.SIGINT, signal.SIG_IGN)
881
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
882
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
883
884
for client in clients:
885
client.start()
1969
for client in tcp_server.clients:
1970
if use_dbus:
1971
# Emit D-Bus signal
1972
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1973
client.enable()
886
1974
887
1975
tcp_server.enable()
888
1976
tcp_server.server_activate()
889
1977
890
1978
# Find out what port we got
891
1979
service.port = tcp_server.socket.getsockname()[1]
892
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
893
u" scope_id %d" % tcp_server.socket.getsockname())
1980
if use_ipv6:
1981
logger.info(u"Now listening on address %r, port %d,"
1982
" flowinfo %d, scope_id %d"
1983
% tcp_server.socket.getsockname())
1984
else: # IPv4
1985
logger.info(u"Now listening on address %r, port %d"
1986
% tcp_server.socket.getsockname())
894
1987
895
1988
#service.interface = tcp_server.socket.getsockname()[3]
896
1989
897
1990
try:
898
1991
# From the Avahi example code
899
server.connect_to_signal("StateChanged", server_state_changed)
900
1992
try:
901
server_state_changed(server.GetState())
1993
service.activate()
902
1994
except dbus.exceptions.DBusException, error:
903
1995
logger.critical(u"DBusException: %s", error)
1996
cleanup()
904
1997
sys.exit(1)
905
1998
# End of Avahi example code
906
1999
907
2000
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
908
2001
lambda *args, **kwargs:
909
tcp_server.handle_request\
910
(*args[2:], **kwargs) or True)
2002
(tcp_server.handle_request
2003
(*args[2:], **kwargs) or True))
911
2004
912
2005
logger.debug(u"Starting main loop")
913
main_loop_started = True
914
2006
main_loop.run()
915
2007
except AvahiError, error:
916
logger.critical(u"AvahiError: %s" + unicode(error))
2008
logger.critical(u"AvahiError: %s", error)
2009
cleanup()
917
2010
sys.exit(1)
918
2011
except KeyboardInterrupt:
919
2012
if debug:
920
print
2013
print >> sys.stderr
2014
logger.debug(u"Server received KeyboardInterrupt")
2015
logger.debug(u"Server exiting")
2016
# Must run before the D-Bus bus name gets deregistered
2017
cleanup()
921
2018
922
2019
if __name__ == '__main__':
923
2020
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0