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- Committer: Teddy Hogeborn
- Date: 2010-09-12 03:00:40 UTC
- Revision ID: teddy@fukt.bsnet.se-20100912030040-b0uopyennste9fdh
Documentation changes:
* DBUS-API: New file documenting the server D-Bus interface.
* clients.conf: Add examples of new approval settings.
* debian/mandos.docs: Added "DBUS-API".
* mandos-clients.conf.xml (OPTIONS): Added "approved_by_default",
"approval_delay", and
"approval_duration".
* mandos.xml (D-BUS INTERFACE): Refer to the "DBUS-API" file.
(BUGS): Remove mention of lack of a remote query interface.
* DBUS-API: New file documenting the server D-Bus interface.
* clients.conf: Add examples of new approval settings.
* debian/mandos.docs: Added "DBUS-API".
* mandos-clients.conf.xml (OPTIONS): Added "approved_by_default",
"approval_delay", and
"approval_duration".
* mandos.xml (D-BUS INTERFACE): Refer to the "DBUS-API" file.
(BUGS): Remove mention of lack of a remote query interface.
- files added:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- network-protocol.txt
- files renamed:
- mandos-client.c => plugin-runner.c
- plugins.d/password-request.c => plugins.d/mandos-client.c
- files modified:
- Makefile
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
24
25
# GNU General Public License for more details.
25
26
#
26
27
# You should have received a copy of the GNU General Public License
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
28
30
#
29
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# Contact the authors at <mandos@fukt.bsnet.se>.
30
32
#
31
33
32
from __future__ import division
34
from __future__ import division, with_statement, absolute_import
33
35
34
import SocketServer
36
import SocketServer as socketserver
35
37
import socket
36
import select
37
from optparse import OptionParser
38
import optparse
38
39
import datetime
39
40
import errno
40
41
import gnutls.crypto
43
44
import gnutls.library.functions
44
45
import gnutls.library.constants
45
46
import gnutls.library.types
46
import ConfigParser
47
import ConfigParser as configparser
47
48
import sys
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49
import re
49
50
import os
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51
import signal
51
from sets import Set
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import subprocess
53
53
import atexit
54
54
import stat
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import logging
56
56
import logging.handlers
57
import pwd
58
import contextlib
59
import struct
60
import fcntl
61
import functools
62
import cPickle as pickle
63
import multiprocessing
57
64
58
65
import dbus
66
import dbus.service
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67
import gobject
60
68
import avahi
61
69
from dbus.mainloop.glib import DBusGMainLoop
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70
import ctypes
63
64
65
logger = logging.Logger('mandos')
66
syslogger = logging.handlers.SysLogHandler\
67
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
68
syslogger.setFormatter(logging.Formatter\
69
('%(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
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#logger = logging.getLogger(u'mandos')
87
logger = logging.Logger(u'mandos')
88
syslogger = (logging.handlers.SysLogHandler
89
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log"))
91
syslogger.setFormatter(logging.Formatter
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(u'Mandos [%(process)d]: %(levelname)s:'
93
u' %(message)s'))
70
94
logger.addHandler(syslogger)
71
del syslogger
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console = logging.StreamHandler()
97
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
98
u' %(levelname)s:'
99
u' %(message)s'))
100
logger.addHandler(console)
73
101
74
102
class AvahiError(Exception):
75
def __init__(self, value):
103
def __init__(self, value, *args, **kwargs):
76
104
self.value = value
77
def __str__(self):
78
return repr(self.value)
105
super(AvahiError, self).__init__(value, *args, **kwargs)
106
def __unicode__(self):
107
return unicode(repr(self.value))
79
108
80
109
class AvahiServiceError(AvahiError):
81
110
pass
86
115
87
116
class AvahiService(object):
88
117
"""An Avahi (Zeroconf) service.
118
89
119
Attributes:
90
120
interface: integer; avahi.IF_UNSPEC or an interface index.
91
121
Used to optionally bind to the specified interface.
92
name: string; Example: 'Mandos'
93
type: string; Example: '_mandos._tcp'.
122
name: string; Example: u'Mandos'
123
type: string; Example: u'_mandos._tcp'.
94
124
See <http://www.dns-sd.org/ServiceTypes.html>
95
125
port: integer; what port to announce
96
126
TXT: list of strings; TXT record for the service
99
129
max_renames: integer; maximum number of renames
100
130
rename_count: integer; counter so we only rename after collisions
101
131
a sensible number of times
132
group: D-Bus Entry Group
133
server: D-Bus Server
134
bus: dbus.SystemBus()
102
135
"""
103
136
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
104
type = None, port = None, TXT = None, domain = "",
105
host = "", max_renames = 12):
137
servicetype = None, port = None, TXT = None,
138
domain = u"", host = u"", max_renames = 32768,
139
protocol = avahi.PROTO_UNSPEC, bus = None):
106
140
self.interface = interface
107
141
self.name = name
108
self.type = type
142
self.type = servicetype
109
143
self.port = port
110
if TXT is None:
111
self.TXT = []
112
else:
113
self.TXT = TXT
144
self.TXT = TXT if TXT is not None else []
114
145
self.domain = domain
115
146
self.host = host
116
147
self.rename_count = 0
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
117
153
def rename(self):
118
154
"""Derived from the Avahi example code"""
119
155
if self.rename_count >= self.max_renames:
120
logger.critical(u"No suitable service name found after %i"
121
u" retries, exiting.", rename_count)
122
raise AvahiServiceError("Too many renames")
123
name = server.GetAlternativeServiceName(name)
124
logger.error(u"Changing name to %r ...", name)
156
logger.critical(u"No suitable Zeroconf service name found"
157
u" after %i retries, exiting.",
158
self.rename_count)
159
raise AvahiServiceError(u"Too many renames")
160
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
161
logger.info(u"Changing Zeroconf service name to %r ...",
162
self.name)
163
syslogger.setFormatter(logging.Formatter
164
(u'Mandos (%s) [%%(process)d]:'
165
u' %%(levelname)s: %%(message)s'
166
% self.name))
125
167
self.remove()
126
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)
127
174
self.rename_count += 1
128
175
def remove(self):
129
176
"""Derived from the Avahi example code"""
130
if group is not None:
131
group.Reset()
177
if self.group is not None:
178
self.group.Reset()
132
179
def add(self):
133
180
"""Derived from the Avahi example code"""
134
global group
135
if group is None:
136
group = dbus.Interface\
137
(bus.get_object(avahi.DBUS_NAME,
138
server.EntryGroupNew()),
139
avahi.DBUS_INTERFACE_ENTRY_GROUP)
140
group.connect_to_signal('StateChanged',
141
entry_group_state_changed)
142
logger.debug(u"Adding service '%s' of type '%s' ...",
143
service.name, service.type)
144
group.AddService(
145
self.interface, # interface
146
avahi.PROTO_INET6, # protocol
147
dbus.UInt32(0), # flags
148
self.name, self.type,
149
self.domain, self.host,
150
dbus.UInt16(self.port),
151
avahi.string_array_to_txt_array(self.TXT))
152
group.Commit()
153
154
# From the Avahi example code:
155
group = None # our entry group
156
# End of Avahi example code
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)
189
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
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())
157
237
158
238
159
239
class Client(object):
160
240
"""A representation of a client host served by this server.
241
161
242
Attributes:
162
name: string; from the config file, used in log messages
243
name: string; from the config file, used in log messages and
244
D-Bus identifiers
163
245
fingerprint: string (40 or 32 hexadecimal digits); used to
164
246
uniquely identify the client
165
secret: bytestring; sent verbatim (over TLS) to client
166
fqdn: string (FQDN); available for use by the checker command
167
created: datetime.datetime(); object creation, not client host
168
last_checked_ok: datetime.datetime() or None if not yet checked OK
169
timeout: datetime.timedelta(); How long from last_checked_ok
170
until this client is invalid
171
interval: datetime.timedelta(); How often to start a new checker
172
stop_hook: If set, called by stop() as stop_hook(self)
173
checker: subprocess.Popen(); a running checker process used
174
to see if the client lives.
175
'None' if no process is running.
247
secret: bytestring; sent verbatim (over TLS) to client
248
host: string; available for use by the checker command
249
created: datetime.datetime(); (UTC) object creation
250
last_enabled: datetime.datetime(); (UTC)
251
enabled: bool()
252
last_checked_ok: datetime.datetime(); (UTC) or None
253
timeout: datetime.timedelta(); How long from last_checked_ok
254
until this client is disabled
255
interval: datetime.timedelta(); How often to start a new checker
256
disable_hook: If set, called by disable() as disable_hook(self)
257
checker: subprocess.Popen(); a running checker process used
258
to see if the client lives.
259
'None' if no process is running.
176
260
checker_initiator_tag: a gobject event source tag, or None
177
stop_initiator_tag: - '' -
261
disable_initiator_tag: - '' -
178
262
checker_callback_tag: - '' -
179
263
checker_command: string; External command which is run to check if
180
264
client lives. %() expansions are done at
181
265
runtime with vars(self) as dict, so that for
182
266
instance %(name)s can be used in the command.
183
Private attibutes:
184
_timeout: Real variable for 'timeout'
185
_interval: Real variable for 'interval'
186
_timeout_milliseconds: Used when calling gobject.timeout_add()
187
_interval_milliseconds: - '' -
267
current_checker_command: string; current running checker_command
268
approval_delay: datetime.timedelta(); Time to wait for approval
269
_approved: bool(); 'None' if not yet approved/disapproved
270
approval_duration: datetime.timedelta(); Duration of one approval
188
271
"""
189
def _set_timeout(self, timeout):
190
"Setter function for 'timeout' attribute"
191
self._timeout = timeout
192
self._timeout_milliseconds = ((self.timeout.days
193
* 24 * 60 * 60 * 1000)
194
+ (self.timeout.seconds * 1000)
195
+ (self.timeout.microseconds
196
// 1000))
197
timeout = property(lambda self: self._timeout,
198
_set_timeout)
199
del _set_timeout
200
def _set_interval(self, interval):
201
"Setter function for 'interval' attribute"
202
self._interval = interval
203
self._interval_milliseconds = ((self.interval.days
204
* 24 * 60 * 60 * 1000)
205
+ (self.interval.seconds
206
* 1000)
207
+ (self.interval.microseconds
208
// 1000))
209
interval = property(lambda self: self._interval,
210
_set_interval)
211
del _set_interval
212
def __init__(self, name = None, stop_hook=None, config={}):
272
273
@staticmethod
274
def _timedelta_to_milliseconds(td):
275
"Convert a datetime.timedelta() to milliseconds"
276
return ((td.days * 24 * 60 * 60 * 1000)
277
+ (td.seconds * 1000)
278
+ (td.microseconds // 1000))
279
280
def timeout_milliseconds(self):
281
"Return the 'timeout' attribute in milliseconds"
282
return self._timedelta_to_milliseconds(self.timeout)
283
284
def interval_milliseconds(self):
285
"Return the 'interval' attribute in milliseconds"
286
return self._timedelta_to_milliseconds(self.interval)
287
288
def approval_delay_milliseconds(self):
289
return self._timedelta_to_milliseconds(self.approval_delay)
290
291
def __init__(self, name = None, disable_hook=None, config=None):
213
292
"""Note: the 'checker' key in 'config' sets the
214
293
'checker_command' attribute and *not* the 'checker'
215
294
attribute."""
216
295
self.name = name
296
if config is None:
297
config = {}
217
298
logger.debug(u"Creating client %r", self.name)
218
299
# Uppercase and remove spaces from fingerprint for later
219
300
# comparison purposes with return value from the fingerprint()
220
301
# function
221
self.fingerprint = config["fingerprint"].upper()\
222
.replace(u" ", u"")
302
self.fingerprint = (config[u"fingerprint"].upper()
303
.replace(u" ", u""))
223
304
logger.debug(u" Fingerprint: %s", self.fingerprint)
224
if "secret" in config:
225
self.secret = config["secret"].decode(u"base64")
226
elif "secfile" in config:
227
sf = open(config["secfile"])
228
self.secret = sf.read()
229
sf.close()
305
if u"secret" in config:
306
self.secret = config[u"secret"].decode(u"base64")
307
elif u"secfile" in config:
308
with open(os.path.expanduser(os.path.expandvars
309
(config[u"secfile"])),
310
"rb") as secfile:
311
self.secret = secfile.read()
230
312
else:
231
313
raise TypeError(u"No secret or secfile for client %s"
232
314
% self.name)
233
self.fqdn = config.get("fqdn", "")
234
self.created = datetime.datetime.now()
315
self.host = config.get(u"host", u"")
316
self.created = datetime.datetime.utcnow()
317
self.enabled = False
318
self.last_enabled = None
235
319
self.last_checked_ok = None
236
self.timeout = string_to_delta(config["timeout"])
237
self.interval = string_to_delta(config["interval"])
238
self.stop_hook = stop_hook
320
self.timeout = string_to_delta(config[u"timeout"])
321
self.interval = string_to_delta(config[u"interval"])
322
self.disable_hook = disable_hook
239
323
self.checker = None
240
324
self.checker_initiator_tag = None
241
self.stop_initiator_tag = None
325
self.disable_initiator_tag = None
242
326
self.checker_callback_tag = None
243
self.check_command = config["checker"]
244
def start(self):
327
self.checker_command = config[u"checker"]
328
self.current_checker_command = None
329
self.last_connect = None
330
self._approved = None
331
self.approved_by_default = config.get(u"approved_by_default",
332
True)
333
self.approvals_pending = 0
334
self.approval_delay = string_to_delta(
335
config[u"approval_delay"])
336
self.approval_duration = string_to_delta(
337
config[u"approval_duration"])
338
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
339
340
def send_changedstate(self):
341
self.changedstate.acquire()
342
self.changedstate.notify_all()
343
self.changedstate.release()
344
345
def enable(self):
245
346
"""Start this client's checker and timeout hooks"""
347
if getattr(self, u"enabled", False):
348
# Already enabled
349
return
350
self.send_changedstate()
351
self.last_enabled = datetime.datetime.utcnow()
246
352
# Schedule a new checker to be started an 'interval' from now,
247
353
# and every interval from then on.
248
self.checker_initiator_tag = gobject.timeout_add\
249
(self._interval_milliseconds,
250
self.start_checker)
354
self.checker_initiator_tag = (gobject.timeout_add
355
(self.interval_milliseconds(),
356
self.start_checker))
357
# Schedule a disable() when 'timeout' has passed
358
self.disable_initiator_tag = (gobject.timeout_add
359
(self.timeout_milliseconds(),
360
self.disable))
361
self.enabled = True
251
362
# Also start a new checker *right now*.
252
363
self.start_checker()
253
# Schedule a stop() when 'timeout' has passed
254
self.stop_initiator_tag = gobject.timeout_add\
255
(self._timeout_milliseconds,
256
self.stop)
257
def stop(self):
258
"""Stop this client.
259
The possibility that a client might be restarted is left open,
260
but not currently used."""
261
# If this client doesn't have a secret, it is already stopped.
262
if self.secret:
263
logger.info(u"Stopping client %s", self.name)
264
self.secret = None
265
else:
364
365
def disable(self, quiet=True):
366
"""Disable this client."""
367
if not getattr(self, "enabled", False):
266
368
return False
267
if getattr(self, "stop_initiator_tag", False):
268
gobject.source_remove(self.stop_initiator_tag)
269
self.stop_initiator_tag = None
270
if getattr(self, "checker_initiator_tag", False):
369
if not quiet:
370
self.send_changedstate()
371
if not quiet:
372
logger.info(u"Disabling client %s", self.name)
373
if getattr(self, u"disable_initiator_tag", False):
374
gobject.source_remove(self.disable_initiator_tag)
375
self.disable_initiator_tag = None
376
if getattr(self, u"checker_initiator_tag", False):
271
377
gobject.source_remove(self.checker_initiator_tag)
272
378
self.checker_initiator_tag = None
273
379
self.stop_checker()
274
if self.stop_hook:
275
self.stop_hook(self)
380
if self.disable_hook:
381
self.disable_hook(self)
382
self.enabled = False
276
383
# Do not run this again if called by a gobject.timeout_add
277
384
return False
385
278
386
def __del__(self):
279
self.stop_hook = None
280
self.stop()
281
def checker_callback(self, pid, condition):
387
self.disable_hook = None
388
self.disable()
389
390
def checker_callback(self, pid, condition, command):
282
391
"""The checker has completed, so take appropriate actions."""
283
now = datetime.datetime.now()
284
392
self.checker_callback_tag = None
285
393
self.checker = None
286
if os.WIFEXITED(condition) \
287
and (os.WEXITSTATUS(condition) == 0):
288
logger.info(u"Checker for %(name)s succeeded",
289
vars(self))
290
self.last_checked_ok = now
291
gobject.source_remove(self.stop_initiator_tag)
292
self.stop_initiator_tag = gobject.timeout_add\
293
(self._timeout_milliseconds,
294
self.stop)
295
elif not os.WIFEXITED(condition):
394
if os.WIFEXITED(condition):
395
exitstatus = os.WEXITSTATUS(condition)
396
if exitstatus == 0:
397
logger.info(u"Checker for %(name)s succeeded",
398
vars(self))
399
self.checked_ok()
400
else:
401
logger.info(u"Checker for %(name)s failed",
402
vars(self))
403
else:
296
404
logger.warning(u"Checker for %(name)s crashed?",
297
405
vars(self))
298
else:
299
logger.info(u"Checker for %(name)s failed",
300
vars(self))
406
407
def checked_ok(self):
408
"""Bump up the timeout for this client.
409
410
This should only be called when the client has been seen,
411
alive and well.
412
"""
413
self.last_checked_ok = datetime.datetime.utcnow()
414
gobject.source_remove(self.disable_initiator_tag)
415
self.disable_initiator_tag = (gobject.timeout_add
416
(self.timeout_milliseconds(),
417
self.disable))
418
301
419
def start_checker(self):
302
420
"""Start a new checker subprocess if one is not running.
421
303
422
If a checker already exists, leave it running and do
304
423
nothing."""
305
424
# The reason for not killing a running checker is that if we
308
427
# client would inevitably timeout, since no checker would get
309
428
# a chance to run to completion. If we instead leave running
310
429
# checkers alone, the checker would have to take more time
311
# than 'timeout' for the client to be declared invalid, which
312
# is as it should be.
430
# than 'timeout' for the client to be disabled, which is as it
431
# should be.
432
433
# If a checker exists, make sure it is not a zombie
434
try:
435
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
436
except (AttributeError, OSError), error:
437
if (isinstance(error, OSError)
438
and error.errno != errno.ECHILD):
439
raise error
440
else:
441
if pid:
442
logger.warning(u"Checker was a zombie")
443
gobject.source_remove(self.checker_callback_tag)
444
self.checker_callback(pid, status,
445
self.current_checker_command)
446
# Start a new checker if needed
313
447
if self.checker is None:
314
448
try:
315
# In case check_command has exactly one % operator
316
command = self.check_command % self.fqdn
449
# In case checker_command has exactly one % operator
450
command = self.checker_command % self.host
317
451
except TypeError:
318
452
# Escape attributes for the shell
319
escaped_attrs = dict((key, re.escape(str(val)))
453
escaped_attrs = dict((key,
454
re.escape(unicode(str(val),
455
errors=
456
u'replace')))
320
457
for key, val in
321
458
vars(self).iteritems())
322
459
try:
323
command = self.check_command % escaped_attrs
460
command = self.checker_command % escaped_attrs
324
461
except TypeError, error:
325
462
logger.error(u'Could not format string "%s":'
326
u' %s', self.check_command, error)
463
u' %s', self.checker_command, error)
327
464
return True # Try again later
465
self.current_checker_command = command
328
466
try:
329
467
logger.info(u"Starting checker %r for %s",
330
468
command, self.name)
469
# We don't need to redirect stdout and stderr, since
470
# in normal mode, that is already done by daemon(),
471
# and in debug mode we don't want to. (Stdin is
472
# always replaced by /dev/null.)
331
473
self.checker = subprocess.Popen(command,
332
474
close_fds=True,
333
shell=True, cwd="/")
334
self.checker_callback_tag = gobject.child_watch_add\
335
(self.checker.pid,
336
self.checker_callback)
337
except subprocess.OSError, error:
475
shell=True, cwd=u"/")
476
self.checker_callback_tag = (gobject.child_watch_add
477
(self.checker.pid,
478
self.checker_callback,
479
data=command))
480
# The checker may have completed before the gobject
481
# watch was added. Check for this.
482
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
483
if pid:
484
gobject.source_remove(self.checker_callback_tag)
485
self.checker_callback(pid, status, command)
486
except OSError, error:
338
487
logger.error(u"Failed to start subprocess: %s",
339
488
error)
340
489
# Re-run this periodically if run by gobject.timeout_add
341
490
return True
491
342
492
def stop_checker(self):
343
493
"""Force the checker process, if any, to stop."""
344
494
if self.checker_callback_tag:
345
495
gobject.source_remove(self.checker_callback_tag)
346
496
self.checker_callback_tag = None
347
if getattr(self, "checker", None) is None:
497
if getattr(self, u"checker", None) is None:
348
498
return
349
logger.debug("Stopping checker for %(name)s", vars(self))
499
logger.debug(u"Stopping checker for %(name)s", vars(self))
350
500
try:
351
501
os.kill(self.checker.pid, signal.SIGTERM)
352
#os.sleep(0.5)
502
#time.sleep(0.5)
353
503
#if self.checker.poll() is None:
354
504
# os.kill(self.checker.pid, signal.SIGKILL)
355
505
except OSError, error:
356
506
if error.errno != errno.ESRCH: # No such process
357
507
raise
358
508
self.checker = None
359
def still_valid(self):
360
"""Has the timeout not yet passed for this client?"""
361
now = datetime.datetime.now()
509
510
def dbus_service_property(dbus_interface, signature=u"v",
511
access=u"readwrite", byte_arrays=False):
512
"""Decorators for marking methods of a DBusObjectWithProperties to
513
become properties on the D-Bus.
514
515
The decorated method will be called with no arguments by "Get"
516
and with one argument by "Set".
517
518
The parameters, where they are supported, are the same as
519
dbus.service.method, except there is only "signature", since the
520
type from Get() and the type sent to Set() is the same.
521
"""
522
# Encoding deeply encoded byte arrays is not supported yet by the
523
# "Set" method, so we fail early here:
524
if byte_arrays and signature != u"ay":
525
raise ValueError(u"Byte arrays not supported for non-'ay'"
526
u" signature %r" % signature)
527
def decorator(func):
528
func._dbus_is_property = True
529
func._dbus_interface = dbus_interface
530
func._dbus_signature = signature
531
func._dbus_access = access
532
func._dbus_name = func.__name__
533
if func._dbus_name.endswith(u"_dbus_property"):
534
func._dbus_name = func._dbus_name[:-14]
535
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
536
return func
537
return decorator
538
539
540
class DBusPropertyException(dbus.exceptions.DBusException):
541
"""A base class for D-Bus property-related exceptions
542
"""
543
def __unicode__(self):
544
return unicode(str(self))
545
546
547
class DBusPropertyAccessException(DBusPropertyException):
548
"""A property's access permissions disallows an operation.
549
"""
550
pass
551
552
553
class DBusPropertyNotFound(DBusPropertyException):
554
"""An attempt was made to access a non-existing property.
555
"""
556
pass
557
558
559
class DBusObjectWithProperties(dbus.service.Object):
560
"""A D-Bus object with properties.
561
562
Classes inheriting from this can use the dbus_service_property
563
decorator to expose methods as D-Bus properties. It exposes the
564
standard Get(), Set(), and GetAll() methods on the D-Bus.
565
"""
566
567
@staticmethod
568
def _is_dbus_property(obj):
569
return getattr(obj, u"_dbus_is_property", False)
570
571
def _get_all_dbus_properties(self):
572
"""Returns a generator of (name, attribute) pairs
573
"""
574
return ((prop._dbus_name, prop)
575
for name, prop in
576
inspect.getmembers(self, self._is_dbus_property))
577
578
def _get_dbus_property(self, interface_name, property_name):
579
"""Returns a bound method if one exists which is a D-Bus
580
property with the specified name and interface.
581
"""
582
for name in (property_name,
583
property_name + u"_dbus_property"):
584
prop = getattr(self, name, None)
585
if (prop is None
586
or not self._is_dbus_property(prop)
587
or prop._dbus_name != property_name
588
or (interface_name and prop._dbus_interface
589
and interface_name != prop._dbus_interface)):
590
continue
591
return prop
592
# No such property
593
raise DBusPropertyNotFound(self.dbus_object_path + u":"
594
+ interface_name + u"."
595
+ property_name)
596
597
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
598
out_signature=u"v")
599
def Get(self, interface_name, property_name):
600
"""Standard D-Bus property Get() method, see D-Bus standard.
601
"""
602
prop = self._get_dbus_property(interface_name, property_name)
603
if prop._dbus_access == u"write":
604
raise DBusPropertyAccessException(property_name)
605
value = prop()
606
if not hasattr(value, u"variant_level"):
607
return value
608
return type(value)(value, variant_level=value.variant_level+1)
609
610
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
611
def Set(self, interface_name, property_name, value):
612
"""Standard D-Bus property Set() method, see D-Bus standard.
613
"""
614
prop = self._get_dbus_property(interface_name, property_name)
615
if prop._dbus_access == u"read":
616
raise DBusPropertyAccessException(property_name)
617
if prop._dbus_get_args_options[u"byte_arrays"]:
618
# The byte_arrays option is not supported yet on
619
# signatures other than "ay".
620
if prop._dbus_signature != u"ay":
621
raise ValueError
622
value = dbus.ByteArray(''.join(unichr(byte)
623
for byte in value))
624
prop(value)
625
626
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
627
out_signature=u"a{sv}")
628
def GetAll(self, interface_name):
629
"""Standard D-Bus property GetAll() method, see D-Bus
630
standard.
631
632
Note: Will not include properties with access="write".
633
"""
634
all = {}
635
for name, prop in self._get_all_dbus_properties():
636
if (interface_name
637
and interface_name != prop._dbus_interface):
638
# Interface non-empty but did not match
639
continue
640
# Ignore write-only properties
641
if prop._dbus_access == u"write":
642
continue
643
value = prop()
644
if not hasattr(value, u"variant_level"):
645
all[name] = value
646
continue
647
all[name] = type(value)(value, variant_level=
648
value.variant_level+1)
649
return dbus.Dictionary(all, signature=u"sv")
650
651
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
652
out_signature=u"s",
653
path_keyword='object_path',
654
connection_keyword='connection')
655
def Introspect(self, object_path, connection):
656
"""Standard D-Bus method, overloaded to insert property tags.
657
"""
658
xmlstring = dbus.service.Object.Introspect(self, object_path,
659
connection)
660
try:
661
document = xml.dom.minidom.parseString(xmlstring)
662
def make_tag(document, name, prop):
663
e = document.createElement(u"property")
664
e.setAttribute(u"name", name)
665
e.setAttribute(u"type", prop._dbus_signature)
666
e.setAttribute(u"access", prop._dbus_access)
667
return e
668
for if_tag in document.getElementsByTagName(u"interface"):
669
for tag in (make_tag(document, name, prop)
670
for name, prop
671
in self._get_all_dbus_properties()
672
if prop._dbus_interface
673
== if_tag.getAttribute(u"name")):
674
if_tag.appendChild(tag)
675
# Add the names to the return values for the
676
# "org.freedesktop.DBus.Properties" methods
677
if (if_tag.getAttribute(u"name")
678
== u"org.freedesktop.DBus.Properties"):
679
for cn in if_tag.getElementsByTagName(u"method"):
680
if cn.getAttribute(u"name") == u"Get":
681
for arg in cn.getElementsByTagName(u"arg"):
682
if (arg.getAttribute(u"direction")
683
== u"out"):
684
arg.setAttribute(u"name", u"value")
685
elif cn.getAttribute(u"name") == u"GetAll":
686
for arg in cn.getElementsByTagName(u"arg"):
687
if (arg.getAttribute(u"direction")
688
== u"out"):
689
arg.setAttribute(u"name", u"props")
690
xmlstring = document.toxml(u"utf-8")
691
document.unlink()
692
except (AttributeError, xml.dom.DOMException,
693
xml.parsers.expat.ExpatError), error:
694
logger.error(u"Failed to override Introspection method",
695
error)
696
return xmlstring
697
698
699
class ClientDBus(Client, DBusObjectWithProperties):
700
"""A Client class using D-Bus
701
702
Attributes:
703
dbus_object_path: dbus.ObjectPath
704
bus: dbus.SystemBus()
705
"""
706
# dbus.service.Object doesn't use super(), so we can't either.
707
708
def __init__(self, bus = None, *args, **kwargs):
709
self._approvals_pending = 0
710
self.bus = bus
711
Client.__init__(self, *args, **kwargs)
712
# Only now, when this client is initialized, can it show up on
713
# the D-Bus
714
self.dbus_object_path = (dbus.ObjectPath
715
(u"/clients/"
716
+ self.name.replace(u".", u"_")))
717
DBusObjectWithProperties.__init__(self, self.bus,
718
self.dbus_object_path)
719
720
def _get_approvals_pending(self):
721
return self._approvals_pending
722
def _set_approvals_pending(self, value):
723
old_value = self._approvals_pending
724
self._approvals_pending = value
725
bval = bool(value)
726
if (hasattr(self, "dbus_object_path")
727
and bval is not bool(old_value)):
728
dbus_bool = dbus.Boolean(bval, variant_level=1)
729
self.PropertyChanged(dbus.String(u"ApprovalPending"),
730
dbus_bool)
731
732
approvals_pending = property(_get_approvals_pending,
733
_set_approvals_pending)
734
del _get_approvals_pending, _set_approvals_pending
735
736
@staticmethod
737
def _datetime_to_dbus(dt, variant_level=0):
738
"""Convert a UTC datetime.datetime() to a D-Bus type."""
739
return dbus.String(dt.isoformat(),
740
variant_level=variant_level)
741
742
def enable(self):
743
oldstate = getattr(self, u"enabled", False)
744
r = Client.enable(self)
745
if oldstate != self.enabled:
746
# Emit D-Bus signals
747
self.PropertyChanged(dbus.String(u"Enabled"),
748
dbus.Boolean(True, variant_level=1))
749
self.PropertyChanged(
750
dbus.String(u"LastEnabled"),
751
self._datetime_to_dbus(self.last_enabled,
752
variant_level=1))
753
return r
754
755
def disable(self, quiet = False):
756
oldstate = getattr(self, u"enabled", False)
757
r = Client.disable(self, quiet=quiet)
758
if not quiet and oldstate != self.enabled:
759
# Emit D-Bus signal
760
self.PropertyChanged(dbus.String(u"Enabled"),
761
dbus.Boolean(False, variant_level=1))
762
return r
763
764
def __del__(self, *args, **kwargs):
765
try:
766
self.remove_from_connection()
767
except LookupError:
768
pass
769
if hasattr(DBusObjectWithProperties, u"__del__"):
770
DBusObjectWithProperties.__del__(self, *args, **kwargs)
771
Client.__del__(self, *args, **kwargs)
772
773
def checker_callback(self, pid, condition, command,
774
*args, **kwargs):
775
self.checker_callback_tag = None
776
self.checker = None
777
# Emit D-Bus signal
778
self.PropertyChanged(dbus.String(u"CheckerRunning"),
779
dbus.Boolean(False, variant_level=1))
780
if os.WIFEXITED(condition):
781
exitstatus = os.WEXITSTATUS(condition)
782
# Emit D-Bus signal
783
self.CheckerCompleted(dbus.Int16(exitstatus),
784
dbus.Int64(condition),
785
dbus.String(command))
786
else:
787
# Emit D-Bus signal
788
self.CheckerCompleted(dbus.Int16(-1),
789
dbus.Int64(condition),
790
dbus.String(command))
791
792
return Client.checker_callback(self, pid, condition, command,
793
*args, **kwargs)
794
795
def checked_ok(self, *args, **kwargs):
796
r = Client.checked_ok(self, *args, **kwargs)
797
# Emit D-Bus signal
798
self.PropertyChanged(
799
dbus.String(u"LastCheckedOK"),
800
(self._datetime_to_dbus(self.last_checked_ok,
801
variant_level=1)))
802
return r
803
804
def start_checker(self, *args, **kwargs):
805
old_checker = self.checker
806
if self.checker is not None:
807
old_checker_pid = self.checker.pid
808
else:
809
old_checker_pid = None
810
r = Client.start_checker(self, *args, **kwargs)
811
# Only if new checker process was started
812
if (self.checker is not None
813
and old_checker_pid != self.checker.pid):
814
# Emit D-Bus signal
815
self.CheckerStarted(self.current_checker_command)
816
self.PropertyChanged(
817
dbus.String(u"CheckerRunning"),
818
dbus.Boolean(True, variant_level=1))
819
return r
820
821
def stop_checker(self, *args, **kwargs):
822
old_checker = getattr(self, u"checker", None)
823
r = Client.stop_checker(self, *args, **kwargs)
824
if (old_checker is not None
825
and getattr(self, u"checker", None) is None):
826
self.PropertyChanged(dbus.String(u"CheckerRunning"),
827
dbus.Boolean(False, variant_level=1))
828
return r
829
830
def _reset_approved(self):
831
self._approved = None
832
return False
833
834
def approve(self, value=True):
835
self.send_changedstate()
836
self._approved = value
837
gobject.timeout_add(self._timedelta_to_milliseconds
838
(self.approval_duration),
839
self._reset_approved)
840
841
842
## D-Bus methods, signals & properties
843
_interface = u"se.bsnet.fukt.Mandos.Client"
844
845
## Signals
846
847
# CheckerCompleted - signal
848
@dbus.service.signal(_interface, signature=u"nxs")
849
def CheckerCompleted(self, exitcode, waitstatus, command):
850
"D-Bus signal"
851
pass
852
853
# CheckerStarted - signal
854
@dbus.service.signal(_interface, signature=u"s")
855
def CheckerStarted(self, command):
856
"D-Bus signal"
857
pass
858
859
# PropertyChanged - signal
860
@dbus.service.signal(_interface, signature=u"sv")
861
def PropertyChanged(self, property, value):
862
"D-Bus signal"
863
pass
864
865
# GotSecret - signal
866
@dbus.service.signal(_interface)
867
def GotSecret(self):
868
"""D-Bus signal
869
Is sent after a successful transfer of secret from the Mandos
870
server to mandos-client
871
"""
872
pass
873
874
# Rejected - signal
875
@dbus.service.signal(_interface, signature=u"s")
876
def Rejected(self, reason):
877
"D-Bus signal"
878
pass
879
880
# NeedApproval - signal
881
@dbus.service.signal(_interface, signature=u"tb")
882
def NeedApproval(self, timeout, default):
883
"D-Bus signal"
884
pass
885
886
## Methods
887
888
# Approve - method
889
@dbus.service.method(_interface, in_signature=u"b")
890
def Approve(self, value):
891
self.approve(value)
892
893
# CheckedOK - method
894
@dbus.service.method(_interface)
895
def CheckedOK(self):
896
return self.checked_ok()
897
898
# Enable - method
899
@dbus.service.method(_interface)
900
def Enable(self):
901
"D-Bus method"
902
self.enable()
903
904
# StartChecker - method
905
@dbus.service.method(_interface)
906
def StartChecker(self):
907
"D-Bus method"
908
self.start_checker()
909
910
# Disable - method
911
@dbus.service.method(_interface)
912
def Disable(self):
913
"D-Bus method"
914
self.disable()
915
916
# StopChecker - method
917
@dbus.service.method(_interface)
918
def StopChecker(self):
919
self.stop_checker()
920
921
## Properties
922
923
# ApprovalPending - property
924
@dbus_service_property(_interface, signature=u"b", access=u"read")
925
def ApprovalPending_dbus_property(self):
926
return dbus.Boolean(bool(self.approvals_pending))
927
928
# ApprovedByDefault - property
929
@dbus_service_property(_interface, signature=u"b",
930
access=u"readwrite")
931
def ApprovedByDefault_dbus_property(self, value=None):
932
if value is None: # get
933
return dbus.Boolean(self.approved_by_default)
934
self.approved_by_default = bool(value)
935
# Emit D-Bus signal
936
self.PropertyChanged(dbus.String(u"ApprovedByDefault"),
937
dbus.Boolean(value, variant_level=1))
938
939
# ApprovalDelay - property
940
@dbus_service_property(_interface, signature=u"t",
941
access=u"readwrite")
942
def ApprovalDelay_dbus_property(self, value=None):
943
if value is None: # get
944
return dbus.UInt64(self.approval_delay_milliseconds())
945
self.approval_delay = datetime.timedelta(0, 0, 0, value)
946
# Emit D-Bus signal
947
self.PropertyChanged(dbus.String(u"ApprovalDelay"),
948
dbus.UInt64(value, variant_level=1))
949
950
# ApprovalDuration - property
951
@dbus_service_property(_interface, signature=u"t",
952
access=u"readwrite")
953
def ApprovalDuration_dbus_property(self, value=None):
954
if value is None: # get
955
return dbus.UInt64(self._timedelta_to_milliseconds(
956
self.approval_duration))
957
self.approval_duration = datetime.timedelta(0, 0, 0, value)
958
# Emit D-Bus signal
959
self.PropertyChanged(dbus.String(u"ApprovalDuration"),
960
dbus.UInt64(value, variant_level=1))
961
962
# Name - property
963
@dbus_service_property(_interface, signature=u"s", access=u"read")
964
def Name_dbus_property(self):
965
return dbus.String(self.name)
966
967
# Fingerprint - property
968
@dbus_service_property(_interface, signature=u"s", access=u"read")
969
def Fingerprint_dbus_property(self):
970
return dbus.String(self.fingerprint)
971
972
# Host - property
973
@dbus_service_property(_interface, signature=u"s",
974
access=u"readwrite")
975
def Host_dbus_property(self, value=None):
976
if value is None: # get
977
return dbus.String(self.host)
978
self.host = value
979
# Emit D-Bus signal
980
self.PropertyChanged(dbus.String(u"Host"),
981
dbus.String(value, variant_level=1))
982
983
# Created - property
984
@dbus_service_property(_interface, signature=u"s", access=u"read")
985
def Created_dbus_property(self):
986
return dbus.String(self._datetime_to_dbus(self.created))
987
988
# LastEnabled - property
989
@dbus_service_property(_interface, signature=u"s", access=u"read")
990
def LastEnabled_dbus_property(self):
991
if self.last_enabled is None:
992
return dbus.String(u"")
993
return dbus.String(self._datetime_to_dbus(self.last_enabled))
994
995
# Enabled - property
996
@dbus_service_property(_interface, signature=u"b",
997
access=u"readwrite")
998
def Enabled_dbus_property(self, value=None):
999
if value is None: # get
1000
return dbus.Boolean(self.enabled)
1001
if value:
1002
self.enable()
1003
else:
1004
self.disable()
1005
1006
# LastCheckedOK - property
1007
@dbus_service_property(_interface, signature=u"s",
1008
access=u"readwrite")
1009
def LastCheckedOK_dbus_property(self, value=None):
1010
if value is not None:
1011
self.checked_ok()
1012
return
362
1013
if self.last_checked_ok is None:
363
return now < (self.created + self.timeout)
364
else:
365
return now < (self.last_checked_ok + self.timeout)
366
367
368
def peer_certificate(session):
369
"Return the peer's OpenPGP certificate as a bytestring"
370
# If not an OpenPGP certificate...
371
if gnutls.library.functions.gnutls_certificate_type_get\
372
(session._c_object) \
373
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
374
# ...do the normal thing
375
return session.peer_certificate
376
list_size = ctypes.c_uint()
377
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
378
(session._c_object, ctypes.byref(list_size))
379
if list_size.value == 0:
380
return None
381
cert = cert_list[0]
382
return ctypes.string_at(cert.data, cert.size)
383
384
385
def fingerprint(openpgp):
386
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
387
# New GnuTLS "datum" with the OpenPGP public key
388
datum = gnutls.library.types.gnutls_datum_t\
389
(ctypes.cast(ctypes.c_char_p(openpgp),
390
ctypes.POINTER(ctypes.c_ubyte)),
391
ctypes.c_uint(len(openpgp)))
392
# New empty GnuTLS certificate
393
crt = gnutls.library.types.gnutls_openpgp_crt_t()
394
gnutls.library.functions.gnutls_openpgp_crt_init\
395
(ctypes.byref(crt))
396
# Import the OpenPGP public key into the certificate
397
gnutls.library.functions.gnutls_openpgp_crt_import\
398
(crt, ctypes.byref(datum),
399
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
400
# New buffer for the fingerprint
401
buffer = ctypes.create_string_buffer(20)
402
buffer_length = ctypes.c_size_t()
403
# Get the fingerprint from the certificate into the buffer
404
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
405
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
406
# Deinit the certificate
407
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
408
# Convert the buffer to a Python bytestring
409
fpr = ctypes.string_at(buffer, buffer_length.value)
410
# Convert the bytestring to hexadecimal notation
411
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
412
return hex_fpr
413
414
415
class tcp_handler(SocketServer.BaseRequestHandler, object):
416
"""A TCP request handler class.
417
Instantiated by IPv6_TCPServer for each request to handle it.
1014
return dbus.String(u"")
1015
return dbus.String(self._datetime_to_dbus(self
1016
.last_checked_ok))
1017
1018
# Timeout - property
1019
@dbus_service_property(_interface, signature=u"t",
1020
access=u"readwrite")
1021
def Timeout_dbus_property(self, value=None):
1022
if value is None: # get
1023
return dbus.UInt64(self.timeout_milliseconds())
1024
self.timeout = datetime.timedelta(0, 0, 0, value)
1025
# Emit D-Bus signal
1026
self.PropertyChanged(dbus.String(u"Timeout"),
1027
dbus.UInt64(value, variant_level=1))
1028
if getattr(self, u"disable_initiator_tag", None) is None:
1029
return
1030
# Reschedule timeout
1031
gobject.source_remove(self.disable_initiator_tag)
1032
self.disable_initiator_tag = None
1033
time_to_die = (self.
1034
_timedelta_to_milliseconds((self
1035
.last_checked_ok
1036
+ self.timeout)
1037
- datetime.datetime
1038
.utcnow()))
1039
if time_to_die <= 0:
1040
# The timeout has passed
1041
self.disable()
1042
else:
1043
self.disable_initiator_tag = (gobject.timeout_add
1044
(time_to_die, self.disable))
1045
1046
# Interval - property
1047
@dbus_service_property(_interface, signature=u"t",
1048
access=u"readwrite")
1049
def Interval_dbus_property(self, value=None):
1050
if value is None: # get
1051
return dbus.UInt64(self.interval_milliseconds())
1052
self.interval = datetime.timedelta(0, 0, 0, value)
1053
# Emit D-Bus signal
1054
self.PropertyChanged(dbus.String(u"Interval"),
1055
dbus.UInt64(value, variant_level=1))
1056
if getattr(self, u"checker_initiator_tag", None) is None:
1057
return
1058
# Reschedule checker run
1059
gobject.source_remove(self.checker_initiator_tag)
1060
self.checker_initiator_tag = (gobject.timeout_add
1061
(value, self.start_checker))
1062
self.start_checker() # Start one now, too
1063
1064
# Checker - property
1065
@dbus_service_property(_interface, signature=u"s",
1066
access=u"readwrite")
1067
def Checker_dbus_property(self, value=None):
1068
if value is None: # get
1069
return dbus.String(self.checker_command)
1070
self.checker_command = value
1071
# Emit D-Bus signal
1072
self.PropertyChanged(dbus.String(u"Checker"),
1073
dbus.String(self.checker_command,
1074
variant_level=1))
1075
1076
# CheckerRunning - property
1077
@dbus_service_property(_interface, signature=u"b",
1078
access=u"readwrite")
1079
def CheckerRunning_dbus_property(self, value=None):
1080
if value is None: # get
1081
return dbus.Boolean(self.checker is not None)
1082
if value:
1083
self.start_checker()
1084
else:
1085
self.stop_checker()
1086
1087
# ObjectPath - property
1088
@dbus_service_property(_interface, signature=u"o", access=u"read")
1089
def ObjectPath_dbus_property(self):
1090
return self.dbus_object_path # is already a dbus.ObjectPath
1091
1092
# Secret = property
1093
@dbus_service_property(_interface, signature=u"ay",
1094
access=u"write", byte_arrays=True)
1095
def Secret_dbus_property(self, value):
1096
self.secret = str(value)
1097
1098
del _interface
1099
1100
1101
class ProxyClient(object):
1102
def __init__(self, child_pipe, fpr, address):
1103
self._pipe = child_pipe
1104
self._pipe.send(('init', fpr, address))
1105
if not self._pipe.recv():
1106
raise KeyError()
1107
1108
def __getattribute__(self, name):
1109
if(name == '_pipe'):
1110
return super(ProxyClient, self).__getattribute__(name)
1111
self._pipe.send(('getattr', name))
1112
data = self._pipe.recv()
1113
if data[0] == 'data':
1114
return data[1]
1115
if data[0] == 'function':
1116
def func(*args, **kwargs):
1117
self._pipe.send(('funcall', name, args, kwargs))
1118
return self._pipe.recv()[1]
1119
return func
1120
1121
def __setattr__(self, name, value):
1122
if(name == '_pipe'):
1123
return super(ProxyClient, self).__setattr__(name, value)
1124
self._pipe.send(('setattr', name, value))
1125
1126
1127
class ClientHandler(socketserver.BaseRequestHandler, object):
1128
"""A class to handle client connections.
1129
1130
Instantiated once for each connection to handle it.
418
1131
Note: This will run in its own forked process."""
419
1132
420
1133
def handle(self):
421
logger.info(u"TCP connection from: %s",
422
unicode(self.client_address))
423
session = gnutls.connection.ClientSession\
424
(self.request, gnutls.connection.X509Credentials())
425
426
line = self.request.makefile().readline()
427
logger.debug(u"Protocol version: %r", line)
428
try:
429
if int(line.strip().split()[0]) > 1:
430
raise RuntimeError
431
except (ValueError, IndexError, RuntimeError), error:
432
logger.error(u"Unknown protocol version: %s", error)
433
return
434
435
# Note: gnutls.connection.X509Credentials is really a generic
436
# GnuTLS certificate credentials object so long as no X.509
437
# keys are added to it. Therefore, we can use it here despite
438
# using OpenPGP certificates.
439
440
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
441
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
442
# "+DHE-DSS"))
443
priority = "NORMAL" # Fallback default, since this
444
# MUST be set.
445
if self.server.settings["priority"]:
446
priority = self.server.settings["priority"]
447
gnutls.library.functions.gnutls_priority_set_direct\
448
(session._c_object, priority, None);
449
450
try:
451
session.handshake()
452
except gnutls.errors.GNUTLSError, error:
453
logger.warning(u"Handshake failed: %s", error)
454
# Do not run session.bye() here: the session is not
455
# established. Just abandon the request.
456
return
457
try:
458
fpr = fingerprint(peer_certificate(session))
459
except (TypeError, gnutls.errors.GNUTLSError), error:
460
logger.warning(u"Bad certificate: %s", error)
461
session.bye()
462
return
463
logger.debug(u"Fingerprint: %s", fpr)
464
client = None
465
for c in self.server.clients:
466
if c.fingerprint == fpr:
467
client = c
468
break
469
if not client:
470
logger.warning(u"Client not found for fingerprint: %s",
471
fpr)
472
session.bye()
473
return
474
# Have to check if client.still_valid(), since it is possible
475
# that the client timed out while establishing the GnuTLS
476
# session.
477
if not client.still_valid():
478
logger.warning(u"Client %(name)s is invalid",
479
vars(client))
480
session.bye()
481
return
482
sent_size = 0
483
while sent_size < len(client.secret):
484
sent = session.send(client.secret[sent_size:])
485
logger.debug(u"Sent: %d, remaining: %d",
486
sent, len(client.secret)
487
- (sent_size + sent))
488
sent_size += sent
489
session.bye()
490
491
492
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
493
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1134
with contextlib.closing(self.server.child_pipe) as child_pipe:
1135
logger.info(u"TCP connection from: %s",
1136
unicode(self.client_address))
1137
logger.debug(u"Pipe FD: %d",
1138
self.server.child_pipe.fileno())
1139
1140
session = (gnutls.connection
1141
.ClientSession(self.request,
1142
gnutls.connection
1143
.X509Credentials()))
1144
1145
# Note: gnutls.connection.X509Credentials is really a
1146
# generic GnuTLS certificate credentials object so long as
1147
# no X.509 keys are added to it. Therefore, we can use it
1148
# here despite using OpenPGP certificates.
1149
1150
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1151
# u"+AES-256-CBC", u"+SHA1",
1152
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1153
# u"+DHE-DSS"))
1154
# Use a fallback default, since this MUST be set.
1155
priority = self.server.gnutls_priority
1156
if priority is None:
1157
priority = u"NORMAL"
1158
(gnutls.library.functions
1159
.gnutls_priority_set_direct(session._c_object,
1160
priority, None))
1161
1162
# Start communication using the Mandos protocol
1163
# Get protocol number
1164
line = self.request.makefile().readline()
1165
logger.debug(u"Protocol version: %r", line)
1166
try:
1167
if int(line.strip().split()[0]) > 1:
1168
raise RuntimeError
1169
except (ValueError, IndexError, RuntimeError), error:
1170
logger.error(u"Unknown protocol version: %s", error)
1171
return
1172
1173
# Start GnuTLS connection
1174
try:
1175
session.handshake()
1176
except gnutls.errors.GNUTLSError, error:
1177
logger.warning(u"Handshake failed: %s", error)
1178
# Do not run session.bye() here: the session is not
1179
# established. Just abandon the request.
1180
return
1181
logger.debug(u"Handshake succeeded")
1182
1183
approval_required = False
1184
try:
1185
try:
1186
fpr = self.fingerprint(self.peer_certificate
1187
(session))
1188
except (TypeError, gnutls.errors.GNUTLSError), error:
1189
logger.warning(u"Bad certificate: %s", error)
1190
return
1191
logger.debug(u"Fingerprint: %s", fpr)
1192
1193
try:
1194
client = ProxyClient(child_pipe, fpr,
1195
self.client_address)
1196
except KeyError:
1197
return
1198
1199
if client.approval_delay:
1200
delay = client.approval_delay
1201
client.approvals_pending += 1
1202
approval_required = True
1203
1204
while True:
1205
if not client.enabled:
1206
logger.warning(u"Client %s is disabled",
1207
client.name)
1208
if self.server.use_dbus:
1209
# Emit D-Bus signal
1210
client.Rejected("Disabled")
1211
return
1212
1213
if client._approved or not client.approval_delay:
1214
#We are approved or approval is disabled
1215
break
1216
elif client._approved is None:
1217
logger.info(u"Client %s needs approval",
1218
client.name)
1219
if self.server.use_dbus:
1220
# Emit D-Bus signal
1221
client.NeedApproval(
1222
client.approval_delay_milliseconds(),
1223
client.approved_by_default)
1224
else:
1225
logger.warning(u"Client %s was not approved",
1226
client.name)
1227
if self.server.use_dbus:
1228
# Emit D-Bus signal
1229
client.Rejected("Denied")
1230
return
1231
1232
#wait until timeout or approved
1233
#x = float(client._timedelta_to_milliseconds(delay))
1234
time = datetime.datetime.now()
1235
client.changedstate.acquire()
1236
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1237
client.changedstate.release()
1238
time2 = datetime.datetime.now()
1239
if (time2 - time) >= delay:
1240
if not client.approved_by_default:
1241
logger.warning("Client %s timed out while"
1242
" waiting for approval",
1243
client.name)
1244
if self.server.use_dbus:
1245
# Emit D-Bus signal
1246
client.Rejected("Timed out")
1247
return
1248
else:
1249
break
1250
else:
1251
delay -= time2 - time
1252
1253
sent_size = 0
1254
while sent_size < len(client.secret):
1255
try:
1256
sent = session.send(client.secret[sent_size:])
1257
except (gnutls.errors.GNUTLSError), error:
1258
logger.warning("gnutls send failed")
1259
return
1260
logger.debug(u"Sent: %d, remaining: %d",
1261
sent, len(client.secret)
1262
- (sent_size + sent))
1263
sent_size += sent
1264
1265
logger.info(u"Sending secret to %s", client.name)
1266
# bump the timeout as if seen
1267
client.checked_ok()
1268
if self.server.use_dbus:
1269
# Emit D-Bus signal
1270
client.GotSecret()
1271
1272
finally:
1273
if approval_required:
1274
client.approvals_pending -= 1
1275
try:
1276
session.bye()
1277
except (gnutls.errors.GNUTLSError), error:
1278
logger.warning("GnuTLS bye failed")
1279
1280
@staticmethod
1281
def peer_certificate(session):
1282
"Return the peer's OpenPGP certificate as a bytestring"
1283
# If not an OpenPGP certificate...
1284
if (gnutls.library.functions
1285
.gnutls_certificate_type_get(session._c_object)
1286
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1287
# ...do the normal thing
1288
return session.peer_certificate
1289
list_size = ctypes.c_uint(1)
1290
cert_list = (gnutls.library.functions
1291
.gnutls_certificate_get_peers
1292
(session._c_object, ctypes.byref(list_size)))
1293
if not bool(cert_list) and list_size.value != 0:
1294
raise gnutls.errors.GNUTLSError(u"error getting peer"
1295
u" certificate")
1296
if list_size.value == 0:
1297
return None
1298
cert = cert_list[0]
1299
return ctypes.string_at(cert.data, cert.size)
1300
1301
@staticmethod
1302
def fingerprint(openpgp):
1303
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1304
# New GnuTLS "datum" with the OpenPGP public key
1305
datum = (gnutls.library.types
1306
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1307
ctypes.POINTER
1308
(ctypes.c_ubyte)),
1309
ctypes.c_uint(len(openpgp))))
1310
# New empty GnuTLS certificate
1311
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1312
(gnutls.library.functions
1313
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1314
# Import the OpenPGP public key into the certificate
1315
(gnutls.library.functions
1316
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1317
gnutls.library.constants
1318
.GNUTLS_OPENPGP_FMT_RAW))
1319
# Verify the self signature in the key
1320
crtverify = ctypes.c_uint()
1321
(gnutls.library.functions
1322
.gnutls_openpgp_crt_verify_self(crt, 0,
1323
ctypes.byref(crtverify)))
1324
if crtverify.value != 0:
1325
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1326
raise (gnutls.errors.CertificateSecurityError
1327
(u"Verify failed"))
1328
# New buffer for the fingerprint
1329
buf = ctypes.create_string_buffer(20)
1330
buf_len = ctypes.c_size_t()
1331
# Get the fingerprint from the certificate into the buffer
1332
(gnutls.library.functions
1333
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1334
ctypes.byref(buf_len)))
1335
# Deinit the certificate
1336
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1337
# Convert the buffer to a Python bytestring
1338
fpr = ctypes.string_at(buf, buf_len.value)
1339
# Convert the bytestring to hexadecimal notation
1340
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1341
return hex_fpr
1342
1343
1344
class MultiprocessingMixIn(object):
1345
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1346
def sub_process_main(self, request, address):
1347
try:
1348
self.finish_request(request, address)
1349
except:
1350
self.handle_error(request, address)
1351
self.close_request(request)
1352
1353
def process_request(self, request, address):
1354
"""Start a new process to process the request."""
1355
multiprocessing.Process(target = self.sub_process_main,
1356
args = (request, address)).start()
1357
1358
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1359
""" adds a pipe to the MixIn """
1360
def process_request(self, request, client_address):
1361
"""Overrides and wraps the original process_request().
1362
1363
This function creates a new pipe in self.pipe
1364
"""
1365
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1366
1367
super(MultiprocessingMixInWithPipe,
1368
self).process_request(request, client_address)
1369
self.child_pipe.close()
1370
self.add_pipe(parent_pipe)
1371
1372
def add_pipe(self, parent_pipe):
1373
"""Dummy function; override as necessary"""
1374
pass
1375
1376
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1377
socketserver.TCPServer, object):
1378
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1379
494
1380
Attributes:
495
settings: Server settings
496
clients: Set() of Client objects
1381
enabled: Boolean; whether this server is activated yet
1382
interface: None or a network interface name (string)
1383
use_ipv6: Boolean; to use IPv6 or not
497
1384
"""
498
address_family = socket.AF_INET6
499
def __init__(self, *args, **kwargs):
500
if "settings" in kwargs:
501
self.settings = kwargs["settings"]
502
del kwargs["settings"]
503
if "clients" in kwargs:
504
self.clients = kwargs["clients"]
505
del kwargs["clients"]
506
return super(type(self), self).__init__(*args, **kwargs)
1385
def __init__(self, server_address, RequestHandlerClass,
1386
interface=None, use_ipv6=True):
1387
self.interface = interface
1388
if use_ipv6:
1389
self.address_family = socket.AF_INET6
1390
socketserver.TCPServer.__init__(self, server_address,
1391
RequestHandlerClass)
507
1392
def server_bind(self):
508
1393
"""This overrides the normal server_bind() function
509
1394
to bind to an interface if one was specified, and also NOT to
510
1395
bind to an address or port if they were not specified."""
511
if self.settings["interface"]:
512
# 25 is from /usr/include/asm-i486/socket.h
513
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
514
try:
515
self.socket.setsockopt(socket.SOL_SOCKET,
516
SO_BINDTODEVICE,
517
self.settings["interface"])
518
except socket.error, error:
519
if error[0] == errno.EPERM:
520
logger.error(u"No permission to"
521
u" bind to interface %s",
522
self.settings["interface"])
523
else:
524
raise error
1396
if self.interface is not None:
1397
if SO_BINDTODEVICE is None:
1398
logger.error(u"SO_BINDTODEVICE does not exist;"
1399
u" cannot bind to interface %s",
1400
self.interface)
1401
else:
1402
try:
1403
self.socket.setsockopt(socket.SOL_SOCKET,
1404
SO_BINDTODEVICE,
1405
str(self.interface
1406
+ u'\0'))
1407
except socket.error, error:
1408
if error[0] == errno.EPERM:
1409
logger.error(u"No permission to"
1410
u" bind to interface %s",
1411
self.interface)
1412
elif error[0] == errno.ENOPROTOOPT:
1413
logger.error(u"SO_BINDTODEVICE not available;"
1414
u" cannot bind to interface %s",
1415
self.interface)
1416
else:
1417
raise
525
1418
# Only bind(2) the socket if we really need to.
526
1419
if self.server_address[0] or self.server_address[1]:
527
1420
if not self.server_address[0]:
528
in6addr_any = "::"
529
self.server_address = (in6addr_any,
1421
if self.address_family == socket.AF_INET6:
1422
any_address = u"::" # in6addr_any
1423
else:
1424
any_address = socket.INADDR_ANY
1425
self.server_address = (any_address,
530
1426
self.server_address[1])
531
elif self.server_address[1] is None:
1427
elif not self.server_address[1]:
532
1428
self.server_address = (self.server_address[0],
533
1429
0)
534
return super(type(self), self).server_bind()
1430
# if self.interface:
1431
# self.server_address = (self.server_address[0],
1432
# 0, # port
1433
# 0, # flowinfo
1434
# if_nametoindex
1435
# (self.interface))
1436
return socketserver.TCPServer.server_bind(self)
1437
1438
1439
class MandosServer(IPv6_TCPServer):
1440
"""Mandos server.
1441
1442
Attributes:
1443
clients: set of Client objects
1444
gnutls_priority GnuTLS priority string
1445
use_dbus: Boolean; to emit D-Bus signals or not
1446
1447
Assumes a gobject.MainLoop event loop.
1448
"""
1449
def __init__(self, server_address, RequestHandlerClass,
1450
interface=None, use_ipv6=True, clients=None,
1451
gnutls_priority=None, use_dbus=True):
1452
self.enabled = False
1453
self.clients = clients
1454
if self.clients is None:
1455
self.clients = set()
1456
self.use_dbus = use_dbus
1457
self.gnutls_priority = gnutls_priority
1458
IPv6_TCPServer.__init__(self, server_address,
1459
RequestHandlerClass,
1460
interface = interface,
1461
use_ipv6 = use_ipv6)
1462
def server_activate(self):
1463
if self.enabled:
1464
return socketserver.TCPServer.server_activate(self)
1465
def enable(self):
1466
self.enabled = True
1467
def add_pipe(self, parent_pipe):
1468
# Call "handle_ipc" for both data and EOF events
1469
gobject.io_add_watch(parent_pipe.fileno(),
1470
gobject.IO_IN | gobject.IO_HUP,
1471
functools.partial(self.handle_ipc,
1472
parent_pipe = parent_pipe))
1473
1474
def handle_ipc(self, source, condition, parent_pipe=None,
1475
client_object=None):
1476
condition_names = {
1477
gobject.IO_IN: u"IN", # There is data to read.
1478
gobject.IO_OUT: u"OUT", # Data can be written (without
1479
# blocking).
1480
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1481
gobject.IO_ERR: u"ERR", # Error condition.
1482
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1483
# broken, usually for pipes and
1484
# sockets).
1485
}
1486
conditions_string = ' | '.join(name
1487
for cond, name in
1488
condition_names.iteritems()
1489
if cond & condition)
1490
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1491
conditions_string)
1492
1493
# error or the other end of multiprocessing.Pipe has closed
1494
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1495
return False
1496
1497
# Read a request from the child
1498
request = parent_pipe.recv()
1499
logger.debug(u"IPC request: %s", repr(request))
1500
command = request[0]
1501
1502
if command == 'init':
1503
fpr = request[1]
1504
address = request[2]
1505
1506
for c in self.clients:
1507
if c.fingerprint == fpr:
1508
client = c
1509
break
1510
else:
1511
logger.warning(u"Client not found for fingerprint: %s, ad"
1512
u"dress: %s", fpr, address)
1513
if self.use_dbus:
1514
# Emit D-Bus signal
1515
mandos_dbus_service.ClientNotFound(fpr, address)
1516
parent_pipe.send(False)
1517
return False
1518
1519
gobject.io_add_watch(parent_pipe.fileno(),
1520
gobject.IO_IN | gobject.IO_HUP,
1521
functools.partial(self.handle_ipc,
1522
parent_pipe = parent_pipe,
1523
client_object = client))
1524
parent_pipe.send(True)
1525
# remove the old hook in favor of the new above hook on same fileno
1526
return False
1527
if command == 'funcall':
1528
funcname = request[1]
1529
args = request[2]
1530
kwargs = request[3]
1531
1532
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1533
1534
if command == 'getattr':
1535
attrname = request[1]
1536
if callable(client_object.__getattribute__(attrname)):
1537
parent_pipe.send(('function',))
1538
else:
1539
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1540
1541
if command == 'setattr':
1542
attrname = request[1]
1543
value = request[2]
1544
setattr(client_object, attrname, value)
1545
1546
return True
535
1547
536
1548
537
1549
def string_to_delta(interval):
538
1550
"""Parse a string and return a datetime.timedelta
539
540
>>> string_to_delta('7d')
1551
1552
>>> string_to_delta(u'7d')
541
1553
datetime.timedelta(7)
542
>>> string_to_delta('60s')
1554
>>> string_to_delta(u'60s')
543
1555
datetime.timedelta(0, 60)
544
>>> string_to_delta('60m')
1556
>>> string_to_delta(u'60m')
545
1557
datetime.timedelta(0, 3600)
546
>>> string_to_delta('24h')
1558
>>> string_to_delta(u'24h')
547
1559
datetime.timedelta(1)
548
1560
>>> string_to_delta(u'1w')
549
1561
datetime.timedelta(7)
1562
>>> string_to_delta(u'5m 30s')
1563
datetime.timedelta(0, 330)
550
1564
"""
551
try:
552
suffix=unicode(interval[-1])
553
value=int(interval[:-1])
554
if suffix == u"d":
555
delta = datetime.timedelta(value)
556
elif suffix == u"s":
557
delta = datetime.timedelta(0, value)
558
elif suffix == u"m":
559
delta = datetime.timedelta(0, 0, 0, 0, value)
560
elif suffix == u"h":
561
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
562
elif suffix == u"w":
563
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
564
else:
565
raise ValueError
566
except (ValueError, IndexError):
567
raise ValueError
568
return delta
569
570
571
def server_state_changed(state):
572
"""Derived from the Avahi example code"""
573
if state == avahi.SERVER_COLLISION:
574
logger.error(u"Server name collision")
575
service.remove()
576
elif state == avahi.SERVER_RUNNING:
577
service.add()
578
579
580
def entry_group_state_changed(state, error):
581
"""Derived from the Avahi example code"""
582
logger.debug(u"state change: %i", state)
583
584
if state == avahi.ENTRY_GROUP_ESTABLISHED:
585
logger.debug(u"Service established.")
586
elif state == avahi.ENTRY_GROUP_COLLISION:
587
logger.warning(u"Service name collision.")
588
service.rename()
589
elif state == avahi.ENTRY_GROUP_FAILURE:
590
logger.critical(u"Error in group state changed %s",
591
unicode(error))
592
raise AvahiGroupError("State changed: %s", str(error))
1565
timevalue = datetime.timedelta(0)
1566
for s in interval.split():
1567
try:
1568
suffix = unicode(s[-1])
1569
value = int(s[:-1])
1570
if suffix == u"d":
1571
delta = datetime.timedelta(value)
1572
elif suffix == u"s":
1573
delta = datetime.timedelta(0, value)
1574
elif suffix == u"m":
1575
delta = datetime.timedelta(0, 0, 0, 0, value)
1576
elif suffix == u"h":
1577
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1578
elif suffix == u"w":
1579
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1580
else:
1581
raise ValueError(u"Unknown suffix %r" % suffix)
1582
except (ValueError, IndexError), e:
1583
raise ValueError(e.message)
1584
timevalue += delta
1585
return timevalue
1586
593
1587
594
1588
def if_nametoindex(interface):
595
"""Call the C function if_nametoindex(), or equivalent"""
1589
"""Call the C function if_nametoindex(), or equivalent
1590
1591
Note: This function cannot accept a unicode string."""
596
1592
global if_nametoindex
597
1593
try:
598
if "ctypes.util" not in sys.modules:
599
import ctypes.util
600
if_nametoindex = ctypes.cdll.LoadLibrary\
601
(ctypes.util.find_library("c")).if_nametoindex
1594
if_nametoindex = (ctypes.cdll.LoadLibrary
1595
(ctypes.util.find_library(u"c"))
1596
.if_nametoindex)
602
1597
except (OSError, AttributeError):
603
if "struct" not in sys.modules:
604
import struct
605
if "fcntl" not in sys.modules:
606
import fcntl
1598
logger.warning(u"Doing if_nametoindex the hard way")
607
1599
def if_nametoindex(interface):
608
1600
"Get an interface index the hard way, i.e. using fcntl()"
609
1601
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
610
s = socket.socket()
611
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
612
struct.pack("16s16x", interface))
613
s.close()
614
interface_index = struct.unpack("I", ifreq[16:20])[0]
1602
with contextlib.closing(socket.socket()) as s:
1603
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1604
struct.pack(str(u"16s16x"),
1605
interface))
1606
interface_index = struct.unpack(str(u"I"),
1607
ifreq[16:20])[0]
615
1608
return interface_index
616
1609
return if_nametoindex(interface)
617
1610
618
1611
619
1612
def daemon(nochdir = False, noclose = False):
620
1613
"""See daemon(3). Standard BSD Unix function.
1614
621
1615
This should really exist as os.daemon, but it doesn't (yet)."""
622
1616
if os.fork():
623
1617
sys.exit()
624
1618
os.setsid()
625
1619
if not nochdir:
626
os.chdir("/")
1620
os.chdir(u"/")
627
1621
if os.fork():
628
1622
sys.exit()
629
1623
if not noclose:
631
1625
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
632
1626
if not stat.S_ISCHR(os.fstat(null).st_mode):
633
1627
raise OSError(errno.ENODEV,
634
"/dev/null not a character device")
1628
u"%s not a character device"
1629
% os.path.devnull)
635
1630
os.dup2(null, sys.stdin.fileno())
636
1631
os.dup2(null, sys.stdout.fileno())
637
1632
os.dup2(null, sys.stderr.fileno())
640
1635
641
1636
642
1637
def main():
643
global main_loop_started
644
main_loop_started = False
645
646
parser = OptionParser()
647
parser.add_option("-i", "--interface", type="string",
648
metavar="IF", help="Bind to interface IF")
649
parser.add_option("-a", "--address", type="string",
650
help="Address to listen for requests on")
651
parser.add_option("-p", "--port", type="int",
652
help="Port number to receive requests on")
653
parser.add_option("--check", action="store_true", default=False,
654
help="Run self-test")
655
parser.add_option("--debug", action="store_true", default=False,
656
help="Debug mode; run in foreground and log to"
657
" terminal")
658
parser.add_option("--priority", type="string", help="GnuTLS"
659
" priority string (see GnuTLS documentation)")
660
parser.add_option("--servicename", type="string", metavar="NAME",
661
help="Zeroconf service name")
662
parser.add_option("--configdir", type="string",
663
default="/etc/mandos", metavar="DIR",
664
help="Directory to search for configuration"
665
" files")
666
(options, args) = parser.parse_args()
1638
1639
##################################################################
1640
# Parsing of options, both command line and config file
1641
1642
parser = optparse.OptionParser(version = "%%prog %s" % version)
1643
parser.add_option("-i", u"--interface", type=u"string",
1644
metavar="IF", help=u"Bind to interface IF")
1645
parser.add_option("-a", u"--address", type=u"string",
1646
help=u"Address to listen for requests on")
1647
parser.add_option("-p", u"--port", type=u"int",
1648
help=u"Port number to receive requests on")
1649
parser.add_option("--check", action=u"store_true",
1650
help=u"Run self-test")
1651
parser.add_option("--debug", action=u"store_true",
1652
help=u"Debug mode; run in foreground and log to"
1653
u" terminal")
1654
parser.add_option("--debuglevel", type=u"string", metavar="Level",
1655
help=u"Debug level for stdout output")
1656
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1657
u" priority string (see GnuTLS documentation)")
1658
parser.add_option("--servicename", type=u"string",
1659
metavar=u"NAME", help=u"Zeroconf service name")
1660
parser.add_option("--configdir", type=u"string",
1661
default=u"/etc/mandos", metavar=u"DIR",
1662
help=u"Directory to search for configuration"
1663
u" files")
1664
parser.add_option("--no-dbus", action=u"store_false",
1665
dest=u"use_dbus", help=u"Do not provide D-Bus"
1666
u" system bus interface")
1667
parser.add_option("--no-ipv6", action=u"store_false",
1668
dest=u"use_ipv6", help=u"Do not use IPv6")
1669
options = parser.parse_args()[0]
667
1670
668
1671
if options.check:
669
1672
import doctest
671
1674
sys.exit()
672
1675
673
1676
# Default values for config file for server-global settings
674
server_defaults = { "interface": "",
675
"address": "",
676
"port": "",
677
"debug": "False",
678
"priority":
679
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
680
"servicename": "Mandos",
1677
server_defaults = { u"interface": u"",
1678
u"address": u"",
1679
u"port": u"",
1680
u"debug": u"False",
1681
u"priority":
1682
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1683
u"servicename": u"Mandos",
1684
u"use_dbus": u"True",
1685
u"use_ipv6": u"True",
1686
u"debuglevel": u"",
681
1687
}
682
1688
683
1689
# Parse config file for server-global settings
684
server_config = ConfigParser.SafeConfigParser(server_defaults)
1690
server_config = configparser.SafeConfigParser(server_defaults)
685
1691
del server_defaults
686
server_config.read(os.path.join(options.configdir, "mandos.conf"))
687
server_section = "server"
1692
server_config.read(os.path.join(options.configdir,
1693
u"mandos.conf"))
688
1694
# Convert the SafeConfigParser object to a dict
689
server_settings = dict(server_config.items(server_section))
690
# Use getboolean on the boolean config option
691
server_settings["debug"] = server_config.getboolean\
692
(server_section, "debug")
1695
server_settings = server_config.defaults()
1696
# Use the appropriate methods on the non-string config options
1697
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1698
server_settings[option] = server_config.getboolean(u"DEFAULT",
1699
option)
1700
if server_settings["port"]:
1701
server_settings["port"] = server_config.getint(u"DEFAULT",
1702
u"port")
693
1703
del server_config
694
1704
695
1705
# Override the settings from the config file with command line
696
1706
# options, if set.
697
for option in ("interface", "address", "port", "debug",
698
"priority", "servicename", "configdir"):
1707
for option in (u"interface", u"address", u"port", u"debug",
1708
u"priority", u"servicename", u"configdir",
1709
u"use_dbus", u"use_ipv6", u"debuglevel"):
699
1710
value = getattr(options, option)
700
1711
if value is not None:
701
1712
server_settings[option] = value
702
1713
del options
1714
# Force all strings to be unicode
1715
for option in server_settings.keys():
1716
if type(server_settings[option]) is str:
1717
server_settings[option] = unicode(server_settings[option])
703
1718
# Now we have our good server settings in "server_settings"
704
1719
1720
##################################################################
1721
1722
# For convenience
1723
debug = server_settings[u"debug"]
1724
debuglevel = server_settings[u"debuglevel"]
1725
use_dbus = server_settings[u"use_dbus"]
1726
use_ipv6 = server_settings[u"use_ipv6"]
1727
1728
if server_settings[u"servicename"] != u"Mandos":
1729
syslogger.setFormatter(logging.Formatter
1730
(u'Mandos (%s) [%%(process)d]:'
1731
u' %%(levelname)s: %%(message)s'
1732
% server_settings[u"servicename"]))
1733
705
1734
# Parse config file with clients
706
client_defaults = { "timeout": "1h",
707
"interval": "5m",
708
"checker": "fping -q -- %%(fqdn)s",
1735
client_defaults = { u"timeout": u"1h",
1736
u"interval": u"5m",
1737
u"checker": u"fping -q -- %%(host)s",
1738
u"host": u"",
1739
u"approval_delay": u"0s",
1740
u"approval_duration": u"1s",
709
1741
}
710
client_config = ConfigParser.SafeConfigParser(client_defaults)
711
client_config.read(os.path.join(server_settings["configdir"],
712
"clients.conf"))
713
714
global service
715
service = AvahiService(name = server_settings["servicename"],
716
type = "_mandos._tcp", );
717
if server_settings["interface"]:
718
service.interface = if_nametoindex(server_settings["interface"])
1742
client_config = configparser.SafeConfigParser(client_defaults)
1743
client_config.read(os.path.join(server_settings[u"configdir"],
1744
u"clients.conf"))
1745
1746
global mandos_dbus_service
1747
mandos_dbus_service = None
1748
1749
tcp_server = MandosServer((server_settings[u"address"],
1750
server_settings[u"port"]),
1751
ClientHandler,
1752
interface=(server_settings[u"interface"]
1753
or None),
1754
use_ipv6=use_ipv6,
1755
gnutls_priority=
1756
server_settings[u"priority"],
1757
use_dbus=use_dbus)
1758
pidfilename = u"/var/run/mandos.pid"
1759
try:
1760
pidfile = open(pidfilename, u"w")
1761
except IOError:
1762
logger.error(u"Could not open file %r", pidfilename)
1763
1764
try:
1765
uid = pwd.getpwnam(u"_mandos").pw_uid
1766
gid = pwd.getpwnam(u"_mandos").pw_gid
1767
except KeyError:
1768
try:
1769
uid = pwd.getpwnam(u"mandos").pw_uid
1770
gid = pwd.getpwnam(u"mandos").pw_gid
1771
except KeyError:
1772
try:
1773
uid = pwd.getpwnam(u"nobody").pw_uid
1774
gid = pwd.getpwnam(u"nobody").pw_gid
1775
except KeyError:
1776
uid = 65534
1777
gid = 65534
1778
try:
1779
os.setgid(gid)
1780
os.setuid(uid)
1781
except OSError, error:
1782
if error[0] != errno.EPERM:
1783
raise error
1784
1785
if not debug and not debuglevel:
1786
syslogger.setLevel(logging.WARNING)
1787
console.setLevel(logging.WARNING)
1788
if debuglevel:
1789
level = getattr(logging, debuglevel.upper())
1790
syslogger.setLevel(level)
1791
console.setLevel(level)
1792
1793
if debug:
1794
# Enable all possible GnuTLS debugging
1795
1796
# "Use a log level over 10 to enable all debugging options."
1797
# - GnuTLS manual
1798
gnutls.library.functions.gnutls_global_set_log_level(11)
1799
1800
@gnutls.library.types.gnutls_log_func
1801
def debug_gnutls(level, string):
1802
logger.debug(u"GnuTLS: %s", string[:-1])
1803
1804
(gnutls.library.functions
1805
.gnutls_global_set_log_function(debug_gnutls))
1806
1807
# Redirect stdin so all checkers get /dev/null
1808
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1809
os.dup2(null, sys.stdin.fileno())
1810
if null > 2:
1811
os.close(null)
1812
else:
1813
# No console logging
1814
logger.removeHandler(console)
1815
719
1816
720
1817
global main_loop
721
global bus
722
global server
723
1818
# From the Avahi example code
724
1819
DBusGMainLoop(set_as_default=True )
725
1820
main_loop = gobject.MainLoop()
726
1821
bus = dbus.SystemBus()
727
server = dbus.Interface(
728
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
729
avahi.DBUS_INTERFACE_SERVER )
730
1822
# End of Avahi example code
731
732
debug = server_settings["debug"]
733
734
if debug:
735
console = logging.StreamHandler()
736
# console.setLevel(logging.DEBUG)
737
console.setFormatter(logging.Formatter\
738
('%(levelname)s: %(message)s'))
739
logger.addHandler(console)
740
del console
741
742
clients = Set()
743
def remove_from_clients(client):
744
clients.remove(client)
745
if not clients:
746
logger.critical(u"No clients left, exiting")
747
sys.exit()
748
749
clients.update(Set(Client(name = section,
750
stop_hook = remove_from_clients,
751
config
752
= dict(client_config.items(section)))
753
for section in client_config.sections()))
754
1823
if use_dbus:
1824
try:
1825
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1826
bus, do_not_queue=True)
1827
except dbus.exceptions.NameExistsException, e:
1828
logger.error(unicode(e) + u", disabling D-Bus")
1829
use_dbus = False
1830
server_settings[u"use_dbus"] = False
1831
tcp_server.use_dbus = False
1832
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1833
service = AvahiService(name = server_settings[u"servicename"],
1834
servicetype = u"_mandos._tcp",
1835
protocol = protocol, bus = bus)
1836
if server_settings["interface"]:
1837
service.interface = (if_nametoindex
1838
(str(server_settings[u"interface"])))
1839
755
1840
if not debug:
1841
# Close all input and output, do double fork, etc.
756
1842
daemon()
1843
1844
global multiprocessing_manager
1845
multiprocessing_manager = multiprocessing.Manager()
1846
1847
client_class = Client
1848
if use_dbus:
1849
client_class = functools.partial(ClientDBus, bus = bus)
1850
def client_config_items(config, section):
1851
special_settings = {
1852
"approved_by_default":
1853
lambda: config.getboolean(section,
1854
"approved_by_default"),
1855
}
1856
for name, value in config.items(section):
1857
try:
1858
yield (name, special_settings[name]())
1859
except KeyError:
1860
yield (name, value)
1861
1862
tcp_server.clients.update(set(
1863
client_class(name = section,
1864
config= dict(client_config_items(
1865
client_config, section)))
1866
for section in client_config.sections()))
1867
if not tcp_server.clients:
1868
logger.warning(u"No clients defined")
1869
1870
try:
1871
with pidfile:
1872
pid = os.getpid()
1873
pidfile.write(str(pid) + "\n")
1874
del pidfile
1875
except IOError:
1876
logger.error(u"Could not write to file %r with PID %d",
1877
pidfilename, pid)
1878
except NameError:
1879
# "pidfile" was never created
1880
pass
1881
del pidfilename
1882
1883
if not debug:
1884
signal.signal(signal.SIGINT, signal.SIG_IGN)
1885
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1886
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1887
1888
if use_dbus:
1889
class MandosDBusService(dbus.service.Object):
1890
"""A D-Bus proxy object"""
1891
def __init__(self):
1892
dbus.service.Object.__init__(self, bus, u"/")
1893
_interface = u"se.bsnet.fukt.Mandos"
1894
1895
@dbus.service.signal(_interface, signature=u"o")
1896
def ClientAdded(self, objpath):
1897
"D-Bus signal"
1898
pass
1899
1900
@dbus.service.signal(_interface, signature=u"ss")
1901
def ClientNotFound(self, fingerprint, address):
1902
"D-Bus signal"
1903
pass
1904
1905
@dbus.service.signal(_interface, signature=u"os")
1906
def ClientRemoved(self, objpath, name):
1907
"D-Bus signal"
1908
pass
1909
1910
@dbus.service.method(_interface, out_signature=u"ao")
1911
def GetAllClients(self):
1912
"D-Bus method"
1913
return dbus.Array(c.dbus_object_path
1914
for c in tcp_server.clients)
1915
1916
@dbus.service.method(_interface,
1917
out_signature=u"a{oa{sv}}")
1918
def GetAllClientsWithProperties(self):
1919
"D-Bus method"
1920
return dbus.Dictionary(
1921
((c.dbus_object_path, c.GetAll(u""))
1922
for c in tcp_server.clients),
1923
signature=u"oa{sv}")
1924
1925
@dbus.service.method(_interface, in_signature=u"o")
1926
def RemoveClient(self, object_path):
1927
"D-Bus method"
1928
for c in tcp_server.clients:
1929
if c.dbus_object_path == object_path:
1930
tcp_server.clients.remove(c)
1931
c.remove_from_connection()
1932
# Don't signal anything except ClientRemoved
1933
c.disable(quiet=True)
1934
# Emit D-Bus signal
1935
self.ClientRemoved(object_path, c.name)
1936
return
1937
raise KeyError(object_path)
1938
1939
del _interface
1940
1941
mandos_dbus_service = MandosDBusService()
757
1942
758
1943
def cleanup():
759
1944
"Cleanup function; run on exit"
760
global group
761
# From the Avahi example code
762
if not group is None:
763
group.Free()
764
group = None
765
# End of Avahi example code
1945
service.cleanup()
766
1946
767
while clients:
768
client = clients.pop()
769
client.stop_hook = None
770
client.stop()
1947
while tcp_server.clients:
1948
client = tcp_server.clients.pop()
1949
if use_dbus:
1950
client.remove_from_connection()
1951
client.disable_hook = None
1952
# Don't signal anything except ClientRemoved
1953
client.disable(quiet=True)
1954
if use_dbus:
1955
# Emit D-Bus signal
1956
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1957
client.name)
771
1958
772
1959
atexit.register(cleanup)
773
1960
774
if not debug:
775
signal.signal(signal.SIGINT, signal.SIG_IGN)
776
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
777
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
778
779
for client in clients:
780
client.start()
781
782
tcp_server = IPv6_TCPServer((server_settings["address"],
783
server_settings["port"]),
784
tcp_handler,
785
settings=server_settings,
786
clients=clients)
1961
for client in tcp_server.clients:
1962
if use_dbus:
1963
# Emit D-Bus signal
1964
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1965
client.enable()
1966
1967
tcp_server.enable()
1968
tcp_server.server_activate()
1969
787
1970
# Find out what port we got
788
1971
service.port = tcp_server.socket.getsockname()[1]
789
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
790
u" scope_id %d" % tcp_server.socket.getsockname())
1972
if use_ipv6:
1973
logger.info(u"Now listening on address %r, port %d,"
1974
" flowinfo %d, scope_id %d"
1975
% tcp_server.socket.getsockname())
1976
else: # IPv4
1977
logger.info(u"Now listening on address %r, port %d"
1978
% tcp_server.socket.getsockname())
791
1979
792
1980
#service.interface = tcp_server.socket.getsockname()[3]
793
1981
794
1982
try:
795
1983
# From the Avahi example code
796
server.connect_to_signal("StateChanged", server_state_changed)
797
1984
try:
798
server_state_changed(server.GetState())
1985
service.activate()
799
1986
except dbus.exceptions.DBusException, error:
800
1987
logger.critical(u"DBusException: %s", error)
1988
cleanup()
801
1989
sys.exit(1)
802
1990
# End of Avahi example code
803
1991
804
1992
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
805
1993
lambda *args, **kwargs:
806
tcp_server.handle_request\
807
(*args[2:], **kwargs) or True)
1994
(tcp_server.handle_request
1995
(*args[2:], **kwargs) or True))
808
1996
809
logger.debug("Starting main loop")
810
main_loop_started = True
1997
logger.debug(u"Starting main loop")
811
1998
main_loop.run()
812
1999
except AvahiError, error:
813
logger.critical(u"AvahiError: %s" + unicode(error))
2000
logger.critical(u"AvahiError: %s", error)
2001
cleanup()
814
2002
sys.exit(1)
815
2003
except KeyboardInterrupt:
816
2004
if debug:
817
print
2005
print >> sys.stderr
2006
logger.debug(u"Server received KeyboardInterrupt")
2007
logger.debug(u"Server exiting")
2008
# Must run before the D-Bus bus name gets deregistered
2009
cleanup()
818
2010
819
2011
if __name__ == '__main__':
820
2012
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0