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- Committer: Teddy Hogeborn
- Date: 2010-10-13 06:12:52 UTC
- Revision ID: teddy@fukt.bsnet.se-20101013061252-3a918xedja5caya8
* debian/mandos-client.lintian-overrides: Added plugins.d/plymouth.
- files added:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- files removed:
- network-protocol.txt
- files renamed:
- mandos-client.c => plugin-runner.c
- mandos-client.xml => plugin-runner.xml
- plugins.d/password-request.c => plugins.d/mandos-client.c
- plugins.d/password-request.xml => plugins.d/mandos-client.xml
- 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
#
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13
# Everything else is
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
14
# Copyright © 2008-2010 Teddy Hogeborn
15
# Copyright © 2008-2010 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/>.
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#
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
48
49
import re
49
50
import os
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import signal
51
from sets import Set
52
52
import subprocess
53
53
import atexit
54
54
import stat
55
55
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
59
67
import gobject
60
68
import avahi
61
69
from dbus.mainloop.glib import DBusGMainLoop
62
70
import ctypes
63
64
version = "1.0"
65
66
logger = logging.Logger('mandos')
67
syslogger = logging.handlers.SysLogHandler\
68
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
69
address = "/dev/log")
70
syslogger.setFormatter(logging.Formatter\
71
('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 = "1.2.3"
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,
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address = "/dev/log"))
91
syslogger.setFormatter(logging.Formatter
92
(u'Mandos [%(process)d]: %(levelname)s:'
93
u' %(message)s'))
72
94
logger.addHandler(syslogger)
73
95
96
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)
74
101
75
102
class AvahiError(Exception):
76
def __init__(self, value):
103
def __init__(self, value, *args, **kwargs):
77
104
self.value = value
78
def __str__(self):
79
return repr(self.value)
105
super(AvahiError, self).__init__(value, *args, **kwargs)
106
def __unicode__(self):
107
return unicode(repr(self.value))
80
108
81
109
class AvahiServiceError(AvahiError):
82
110
pass
87
115
88
116
class AvahiService(object):
89
117
"""An Avahi (Zeroconf) service.
118
90
119
Attributes:
91
120
interface: integer; avahi.IF_UNSPEC or an interface index.
92
121
Used to optionally bind to the specified interface.
93
name: string; Example: 'Mandos'
94
type: string; Example: '_mandos._tcp'.
122
name: string; Example: u'Mandos'
123
type: string; Example: u'_mandos._tcp'.
95
124
See <http://www.dns-sd.org/ServiceTypes.html>
96
125
port: integer; what port to announce
97
126
TXT: list of strings; TXT record for the service
100
129
max_renames: integer; maximum number of renames
101
130
rename_count: integer; counter so we only rename after collisions
102
131
a sensible number of times
132
group: D-Bus Entry Group
133
server: D-Bus Server
134
bus: dbus.SystemBus()
103
135
"""
104
136
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
105
type = None, port = None, TXT = None, domain = "",
106
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):
107
140
self.interface = interface
108
141
self.name = name
109
self.type = type
142
self.type = servicetype
110
143
self.port = port
111
if TXT is None:
112
self.TXT = []
113
else:
114
self.TXT = TXT
144
self.TXT = TXT if TXT is not None else []
115
145
self.domain = domain
116
146
self.host = host
117
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
118
153
def rename(self):
119
154
"""Derived from the Avahi example code"""
120
155
if self.rename_count >= self.max_renames:
121
logger.critical(u"No suitable service name found after %i"
122
u" retries, exiting.", rename_count)
123
raise AvahiServiceError("Too many renames")
124
name = server.GetAlternativeServiceName(name)
125
logger.error(u"Changing name to %r ...", name)
126
syslogger.setFormatter(logging.Formatter\
127
('Mandos (%s): %%(levelname)s:'
128
' %%(message)s' % 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))
129
167
self.remove()
130
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)
131
174
self.rename_count += 1
132
175
def remove(self):
133
176
"""Derived from the Avahi example code"""
134
if group is not None:
135
group.Reset()
177
if self.group is not None:
178
self.group.Reset()
136
179
def add(self):
137
180
"""Derived from the Avahi example code"""
138
global group
139
if group is None:
140
group = dbus.Interface\
141
(bus.get_object(avahi.DBUS_NAME,
142
server.EntryGroupNew()),
143
avahi.DBUS_INTERFACE_ENTRY_GROUP)
144
group.connect_to_signal('StateChanged',
145
entry_group_state_changed)
146
logger.debug(u"Adding service '%s' of type '%s' ...",
147
service.name, service.type)
148
group.AddService(
149
self.interface, # interface
150
avahi.PROTO_INET6, # protocol
151
dbus.UInt32(0), # flags
152
self.name, self.type,
153
self.domain, self.host,
154
dbus.UInt16(self.port),
155
avahi.string_array_to_txt_array(self.TXT))
156
group.Commit()
157
158
# From the Avahi example code:
159
group = None # our entry group
160
# 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())
161
237
162
238
163
239
class Client(object):
164
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"""A representation of a client host served by this server.
241
165
242
Attributes:
166
name: string; from the config file, used in log messages
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.
249
checker_callback_tag: a gobject event source tag, or None
250
checker_command: string; External command which is run to check
251
if client lives. %() expansions are done at
252
runtime with vars(self) as dict, so that for
253
instance %(name)s can be used in the command.
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: a gobject event source tag, or None
259
enabled: bool()
167
260
fingerprint: string (40 or 32 hexadecimal digits); used to
168
261
uniquely identify the client
169
secret: bytestring; sent verbatim (over TLS) to client
170
host: string; available for use by the checker command
171
created: datetime.datetime(); object creation, not client host
172
last_checked_ok: datetime.datetime() or None if not yet checked OK
173
timeout: datetime.timedelta(); How long from last_checked_ok
174
until this client is invalid
175
interval: datetime.timedelta(); How often to start a new checker
176
stop_hook: If set, called by stop() as stop_hook(self)
177
checker: subprocess.Popen(); a running checker process used
178
to see if the client lives.
179
'None' if no process is running.
180
checker_initiator_tag: a gobject event source tag, or None
181
stop_initiator_tag: - '' -
182
checker_callback_tag: - '' -
183
checker_command: string; External command which is run to check if
184
client lives. %() expansions are done at
185
runtime with vars(self) as dict, so that for
186
instance %(name)s can be used in the command.
187
Private attibutes:
188
_timeout: Real variable for 'timeout'
189
_interval: Real variable for 'interval'
190
_timeout_milliseconds: Used when calling gobject.timeout_add()
191
_interval_milliseconds: - '' -
262
host: string; available for use by the checker command
263
interval: datetime.timedelta(); How often to start a new checker
264
last_approval_request: datetime.datetime(); (UTC) or None
265
last_checked_ok: datetime.datetime(); (UTC) or None
266
last_enabled: datetime.datetime(); (UTC)
267
name: string; from the config file, used in log messages and
268
D-Bus identifiers
269
secret: bytestring; sent verbatim (over TLS) to client
270
timeout: datetime.timedelta(); How long from last_checked_ok
271
until this client is disabled
272
runtime_expansions: Allowed attributes for runtime expansion.
192
273
"""
193
def _set_timeout(self, timeout):
194
"Setter function for 'timeout' attribute"
195
self._timeout = timeout
196
self._timeout_milliseconds = ((self.timeout.days
197
* 24 * 60 * 60 * 1000)
198
+ (self.timeout.seconds * 1000)
199
+ (self.timeout.microseconds
200
// 1000))
201
timeout = property(lambda self: self._timeout,
202
_set_timeout)
203
del _set_timeout
204
def _set_interval(self, interval):
205
"Setter function for 'interval' attribute"
206
self._interval = interval
207
self._interval_milliseconds = ((self.interval.days
208
* 24 * 60 * 60 * 1000)
209
+ (self.interval.seconds
210
* 1000)
211
+ (self.interval.microseconds
212
// 1000))
213
interval = property(lambda self: self._interval,
214
_set_interval)
215
del _set_interval
216
def __init__(self, name = None, stop_hook=None, config={}):
274
275
runtime_expansions = (u"approval_delay", u"approval_duration",
276
u"created", u"enabled", u"fingerprint",
277
u"host", u"interval", u"last_checked_ok",
278
u"last_enabled", u"name", u"timeout")
279
280
@staticmethod
281
def _timedelta_to_milliseconds(td):
282
"Convert a datetime.timedelta() to milliseconds"
283
return ((td.days * 24 * 60 * 60 * 1000)
284
+ (td.seconds * 1000)
285
+ (td.microseconds // 1000))
286
287
def timeout_milliseconds(self):
288
"Return the 'timeout' attribute in milliseconds"
289
return self._timedelta_to_milliseconds(self.timeout)
290
291
def interval_milliseconds(self):
292
"Return the 'interval' attribute in milliseconds"
293
return self._timedelta_to_milliseconds(self.interval)
294
295
def approval_delay_milliseconds(self):
296
return self._timedelta_to_milliseconds(self.approval_delay)
297
298
def __init__(self, name = None, disable_hook=None, config=None):
217
299
"""Note: the 'checker' key in 'config' sets the
218
300
'checker_command' attribute and *not* the 'checker'
219
301
attribute."""
220
302
self.name = name
303
if config is None:
304
config = {}
221
305
logger.debug(u"Creating client %r", self.name)
222
306
# Uppercase and remove spaces from fingerprint for later
223
307
# comparison purposes with return value from the fingerprint()
224
308
# function
225
self.fingerprint = config["fingerprint"].upper()\
226
.replace(u" ", u"")
309
self.fingerprint = (config[u"fingerprint"].upper()
310
.replace(u" ", u""))
227
311
logger.debug(u" Fingerprint: %s", self.fingerprint)
228
if "secret" in config:
229
self.secret = config["secret"].decode(u"base64")
230
elif "secfile" in config:
231
sf = open(config["secfile"])
232
self.secret = sf.read()
233
sf.close()
312
if u"secret" in config:
313
self.secret = config[u"secret"].decode(u"base64")
314
elif u"secfile" in config:
315
with open(os.path.expanduser(os.path.expandvars
316
(config[u"secfile"])),
317
"rb") as secfile:
318
self.secret = secfile.read()
234
319
else:
235
320
raise TypeError(u"No secret or secfile for client %s"
236
321
% self.name)
237
self.host = config.get("host", "")
238
self.created = datetime.datetime.now()
322
self.host = config.get(u"host", u"")
323
self.created = datetime.datetime.utcnow()
324
self.enabled = False
325
self.last_approval_request = None
326
self.last_enabled = None
239
327
self.last_checked_ok = None
240
self.timeout = string_to_delta(config["timeout"])
241
self.interval = string_to_delta(config["interval"])
242
self.stop_hook = stop_hook
328
self.timeout = string_to_delta(config[u"timeout"])
329
self.interval = string_to_delta(config[u"interval"])
330
self.disable_hook = disable_hook
243
331
self.checker = None
244
332
self.checker_initiator_tag = None
245
self.stop_initiator_tag = None
333
self.disable_initiator_tag = None
246
334
self.checker_callback_tag = None
247
self.check_command = config["checker"]
248
def start(self):
335
self.checker_command = config[u"checker"]
336
self.current_checker_command = None
337
self.last_connect = None
338
self._approved = None
339
self.approved_by_default = config.get(u"approved_by_default",
340
True)
341
self.approvals_pending = 0
342
self.approval_delay = string_to_delta(
343
config[u"approval_delay"])
344
self.approval_duration = string_to_delta(
345
config[u"approval_duration"])
346
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
347
348
def send_changedstate(self):
349
self.changedstate.acquire()
350
self.changedstate.notify_all()
351
self.changedstate.release()
352
353
def enable(self):
249
354
"""Start this client's checker and timeout hooks"""
355
if getattr(self, u"enabled", False):
356
# Already enabled
357
return
358
self.send_changedstate()
359
self.last_enabled = datetime.datetime.utcnow()
250
360
# Schedule a new checker to be started an 'interval' from now,
251
361
# and every interval from then on.
252
self.checker_initiator_tag = gobject.timeout_add\
253
(self._interval_milliseconds,
254
self.start_checker)
362
self.checker_initiator_tag = (gobject.timeout_add
363
(self.interval_milliseconds(),
364
self.start_checker))
365
# Schedule a disable() when 'timeout' has passed
366
self.disable_initiator_tag = (gobject.timeout_add
367
(self.timeout_milliseconds(),
368
self.disable))
369
self.enabled = True
255
370
# Also start a new checker *right now*.
256
371
self.start_checker()
257
# Schedule a stop() when 'timeout' has passed
258
self.stop_initiator_tag = gobject.timeout_add\
259
(self._timeout_milliseconds,
260
self.stop)
261
def stop(self):
262
"""Stop this client.
263
The possibility that a client might be restarted is left open,
264
but not currently used."""
265
# If this client doesn't have a secret, it is already stopped.
266
if hasattr(self, "secret") and self.secret:
267
logger.info(u"Stopping client %s", self.name)
268
self.secret = None
269
else:
372
373
def disable(self, quiet=True):
374
"""Disable this client."""
375
if not getattr(self, "enabled", False):
270
376
return False
271
if getattr(self, "stop_initiator_tag", False):
272
gobject.source_remove(self.stop_initiator_tag)
273
self.stop_initiator_tag = None
274
if getattr(self, "checker_initiator_tag", False):
377
if not quiet:
378
self.send_changedstate()
379
if not quiet:
380
logger.info(u"Disabling client %s", self.name)
381
if getattr(self, u"disable_initiator_tag", False):
382
gobject.source_remove(self.disable_initiator_tag)
383
self.disable_initiator_tag = None
384
if getattr(self, u"checker_initiator_tag", False):
275
385
gobject.source_remove(self.checker_initiator_tag)
276
386
self.checker_initiator_tag = None
277
387
self.stop_checker()
278
if self.stop_hook:
279
self.stop_hook(self)
388
if self.disable_hook:
389
self.disable_hook(self)
390
self.enabled = False
280
391
# Do not run this again if called by a gobject.timeout_add
281
392
return False
393
282
394
def __del__(self):
283
self.stop_hook = None
284
self.stop()
285
def checker_callback(self, pid, condition):
395
self.disable_hook = None
396
self.disable()
397
398
def checker_callback(self, pid, condition, command):
286
399
"""The checker has completed, so take appropriate actions."""
287
now = datetime.datetime.now()
288
400
self.checker_callback_tag = None
289
401
self.checker = None
290
if os.WIFEXITED(condition) \
291
and (os.WEXITSTATUS(condition) == 0):
292
logger.info(u"Checker for %(name)s succeeded",
293
vars(self))
294
self.last_checked_ok = now
295
gobject.source_remove(self.stop_initiator_tag)
296
self.stop_initiator_tag = gobject.timeout_add\
297
(self._timeout_milliseconds,
298
self.stop)
299
elif not os.WIFEXITED(condition):
402
if os.WIFEXITED(condition):
403
exitstatus = os.WEXITSTATUS(condition)
404
if exitstatus == 0:
405
logger.info(u"Checker for %(name)s succeeded",
406
vars(self))
407
self.checked_ok()
408
else:
409
logger.info(u"Checker for %(name)s failed",
410
vars(self))
411
else:
300
412
logger.warning(u"Checker for %(name)s crashed?",
301
413
vars(self))
302
else:
303
logger.info(u"Checker for %(name)s failed",
304
vars(self))
414
415
def checked_ok(self):
416
"""Bump up the timeout for this client.
417
418
This should only be called when the client has been seen,
419
alive and well.
420
"""
421
self.last_checked_ok = datetime.datetime.utcnow()
422
gobject.source_remove(self.disable_initiator_tag)
423
self.disable_initiator_tag = (gobject.timeout_add
424
(self.timeout_milliseconds(),
425
self.disable))
426
427
def need_approval(self):
428
self.last_approval_request = datetime.datetime.utcnow()
429
305
430
def start_checker(self):
306
431
"""Start a new checker subprocess if one is not running.
432
307
433
If a checker already exists, leave it running and do
308
434
nothing."""
309
435
# The reason for not killing a running checker is that if we
312
438
# client would inevitably timeout, since no checker would get
313
439
# a chance to run to completion. If we instead leave running
314
440
# checkers alone, the checker would have to take more time
315
# than 'timeout' for the client to be declared invalid, which
316
# is as it should be.
441
# than 'timeout' for the client to be disabled, which is as it
442
# should be.
443
444
# If a checker exists, make sure it is not a zombie
445
try:
446
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
447
except (AttributeError, OSError), error:
448
if (isinstance(error, OSError)
449
and error.errno != errno.ECHILD):
450
raise error
451
else:
452
if pid:
453
logger.warning(u"Checker was a zombie")
454
gobject.source_remove(self.checker_callback_tag)
455
self.checker_callback(pid, status,
456
self.current_checker_command)
457
# Start a new checker if needed
317
458
if self.checker is None:
318
459
try:
319
# In case check_command has exactly one % operator
320
command = self.check_command % self.host
460
# In case checker_command has exactly one % operator
461
command = self.checker_command % self.host
321
462
except TypeError:
322
463
# Escape attributes for the shell
323
escaped_attrs = dict((key, re.escape(str(val)))
324
for key, val in
325
vars(self).iteritems())
464
escaped_attrs = dict(
465
(attr,
466
re.escape(unicode(str(getattr(self, attr, u"")),
467
errors=
468
u'replace')))
469
for attr in
470
self.runtime_expansions)
471
326
472
try:
327
command = self.check_command % escaped_attrs
473
command = self.checker_command % escaped_attrs
328
474
except TypeError, error:
329
475
logger.error(u'Could not format string "%s":'
330
u' %s', self.check_command, error)
476
u' %s', self.checker_command, error)
331
477
return True # Try again later
478
self.current_checker_command = command
332
479
try:
333
480
logger.info(u"Starting checker %r for %s",
334
481
command, self.name)
482
# We don't need to redirect stdout and stderr, since
483
# in normal mode, that is already done by daemon(),
484
# and in debug mode we don't want to. (Stdin is
485
# always replaced by /dev/null.)
335
486
self.checker = subprocess.Popen(command,
336
487
close_fds=True,
337
shell=True, cwd="/")
338
self.checker_callback_tag = gobject.child_watch_add\
339
(self.checker.pid,
340
self.checker_callback)
341
except subprocess.OSError, error:
488
shell=True, cwd=u"/")
489
self.checker_callback_tag = (gobject.child_watch_add
490
(self.checker.pid,
491
self.checker_callback,
492
data=command))
493
# The checker may have completed before the gobject
494
# watch was added. Check for this.
495
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
496
if pid:
497
gobject.source_remove(self.checker_callback_tag)
498
self.checker_callback(pid, status, command)
499
except OSError, error:
342
500
logger.error(u"Failed to start subprocess: %s",
343
501
error)
344
502
# Re-run this periodically if run by gobject.timeout_add
345
503
return True
504
346
505
def stop_checker(self):
347
506
"""Force the checker process, if any, to stop."""
348
507
if self.checker_callback_tag:
349
508
gobject.source_remove(self.checker_callback_tag)
350
509
self.checker_callback_tag = None
351
if getattr(self, "checker", None) is None:
510
if getattr(self, u"checker", None) is None:
352
511
return
353
512
logger.debug(u"Stopping checker for %(name)s", vars(self))
354
513
try:
355
514
os.kill(self.checker.pid, signal.SIGTERM)
356
#os.sleep(0.5)
515
#time.sleep(0.5)
357
516
#if self.checker.poll() is None:
358
517
# os.kill(self.checker.pid, signal.SIGKILL)
359
518
except OSError, error:
360
519
if error.errno != errno.ESRCH: # No such process
361
520
raise
362
521
self.checker = None
363
def still_valid(self):
364
"""Has the timeout not yet passed for this client?"""
365
now = datetime.datetime.now()
522
523
def dbus_service_property(dbus_interface, signature=u"v",
524
access=u"readwrite", byte_arrays=False):
525
"""Decorators for marking methods of a DBusObjectWithProperties to
526
become properties on the D-Bus.
527
528
The decorated method will be called with no arguments by "Get"
529
and with one argument by "Set".
530
531
The parameters, where they are supported, are the same as
532
dbus.service.method, except there is only "signature", since the
533
type from Get() and the type sent to Set() is the same.
534
"""
535
# Encoding deeply encoded byte arrays is not supported yet by the
536
# "Set" method, so we fail early here:
537
if byte_arrays and signature != u"ay":
538
raise ValueError(u"Byte arrays not supported for non-'ay'"
539
u" signature %r" % signature)
540
def decorator(func):
541
func._dbus_is_property = True
542
func._dbus_interface = dbus_interface
543
func._dbus_signature = signature
544
func._dbus_access = access
545
func._dbus_name = func.__name__
546
if func._dbus_name.endswith(u"_dbus_property"):
547
func._dbus_name = func._dbus_name[:-14]
548
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
549
return func
550
return decorator
551
552
553
class DBusPropertyException(dbus.exceptions.DBusException):
554
"""A base class for D-Bus property-related exceptions
555
"""
556
def __unicode__(self):
557
return unicode(str(self))
558
559
560
class DBusPropertyAccessException(DBusPropertyException):
561
"""A property's access permissions disallows an operation.
562
"""
563
pass
564
565
566
class DBusPropertyNotFound(DBusPropertyException):
567
"""An attempt was made to access a non-existing property.
568
"""
569
pass
570
571
572
class DBusObjectWithProperties(dbus.service.Object):
573
"""A D-Bus object with properties.
574
575
Classes inheriting from this can use the dbus_service_property
576
decorator to expose methods as D-Bus properties. It exposes the
577
standard Get(), Set(), and GetAll() methods on the D-Bus.
578
"""
579
580
@staticmethod
581
def _is_dbus_property(obj):
582
return getattr(obj, u"_dbus_is_property", False)
583
584
def _get_all_dbus_properties(self):
585
"""Returns a generator of (name, attribute) pairs
586
"""
587
return ((prop._dbus_name, prop)
588
for name, prop in
589
inspect.getmembers(self, self._is_dbus_property))
590
591
def _get_dbus_property(self, interface_name, property_name):
592
"""Returns a bound method if one exists which is a D-Bus
593
property with the specified name and interface.
594
"""
595
for name in (property_name,
596
property_name + u"_dbus_property"):
597
prop = getattr(self, name, None)
598
if (prop is None
599
or not self._is_dbus_property(prop)
600
or prop._dbus_name != property_name
601
or (interface_name and prop._dbus_interface
602
and interface_name != prop._dbus_interface)):
603
continue
604
return prop
605
# No such property
606
raise DBusPropertyNotFound(self.dbus_object_path + u":"
607
+ interface_name + u"."
608
+ property_name)
609
610
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
611
out_signature=u"v")
612
def Get(self, interface_name, property_name):
613
"""Standard D-Bus property Get() method, see D-Bus standard.
614
"""
615
prop = self._get_dbus_property(interface_name, property_name)
616
if prop._dbus_access == u"write":
617
raise DBusPropertyAccessException(property_name)
618
value = prop()
619
if not hasattr(value, u"variant_level"):
620
return value
621
return type(value)(value, variant_level=value.variant_level+1)
622
623
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
624
def Set(self, interface_name, property_name, value):
625
"""Standard D-Bus property Set() method, see D-Bus standard.
626
"""
627
prop = self._get_dbus_property(interface_name, property_name)
628
if prop._dbus_access == u"read":
629
raise DBusPropertyAccessException(property_name)
630
if prop._dbus_get_args_options[u"byte_arrays"]:
631
# The byte_arrays option is not supported yet on
632
# signatures other than "ay".
633
if prop._dbus_signature != u"ay":
634
raise ValueError
635
value = dbus.ByteArray(''.join(unichr(byte)
636
for byte in value))
637
prop(value)
638
639
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
640
out_signature=u"a{sv}")
641
def GetAll(self, interface_name):
642
"""Standard D-Bus property GetAll() method, see D-Bus
643
standard.
644
645
Note: Will not include properties with access="write".
646
"""
647
all = {}
648
for name, prop in self._get_all_dbus_properties():
649
if (interface_name
650
and interface_name != prop._dbus_interface):
651
# Interface non-empty but did not match
652
continue
653
# Ignore write-only properties
654
if prop._dbus_access == u"write":
655
continue
656
value = prop()
657
if not hasattr(value, u"variant_level"):
658
all[name] = value
659
continue
660
all[name] = type(value)(value, variant_level=
661
value.variant_level+1)
662
return dbus.Dictionary(all, signature=u"sv")
663
664
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
665
out_signature=u"s",
666
path_keyword='object_path',
667
connection_keyword='connection')
668
def Introspect(self, object_path, connection):
669
"""Standard D-Bus method, overloaded to insert property tags.
670
"""
671
xmlstring = dbus.service.Object.Introspect(self, object_path,
672
connection)
673
try:
674
document = xml.dom.minidom.parseString(xmlstring)
675
def make_tag(document, name, prop):
676
e = document.createElement(u"property")
677
e.setAttribute(u"name", name)
678
e.setAttribute(u"type", prop._dbus_signature)
679
e.setAttribute(u"access", prop._dbus_access)
680
return e
681
for if_tag in document.getElementsByTagName(u"interface"):
682
for tag in (make_tag(document, name, prop)
683
for name, prop
684
in self._get_all_dbus_properties()
685
if prop._dbus_interface
686
== if_tag.getAttribute(u"name")):
687
if_tag.appendChild(tag)
688
# Add the names to the return values for the
689
# "org.freedesktop.DBus.Properties" methods
690
if (if_tag.getAttribute(u"name")
691
== u"org.freedesktop.DBus.Properties"):
692
for cn in if_tag.getElementsByTagName(u"method"):
693
if cn.getAttribute(u"name") == u"Get":
694
for arg in cn.getElementsByTagName(u"arg"):
695
if (arg.getAttribute(u"direction")
696
== u"out"):
697
arg.setAttribute(u"name", u"value")
698
elif cn.getAttribute(u"name") == u"GetAll":
699
for arg in cn.getElementsByTagName(u"arg"):
700
if (arg.getAttribute(u"direction")
701
== u"out"):
702
arg.setAttribute(u"name", u"props")
703
xmlstring = document.toxml(u"utf-8")
704
document.unlink()
705
except (AttributeError, xml.dom.DOMException,
706
xml.parsers.expat.ExpatError), error:
707
logger.error(u"Failed to override Introspection method",
708
error)
709
return xmlstring
710
711
712
class ClientDBus(Client, DBusObjectWithProperties):
713
"""A Client class using D-Bus
714
715
Attributes:
716
dbus_object_path: dbus.ObjectPath
717
bus: dbus.SystemBus()
718
"""
719
720
runtime_expansions = (Client.runtime_expansions
721
+ (u"dbus_object_path",))
722
723
# dbus.service.Object doesn't use super(), so we can't either.
724
725
def __init__(self, bus = None, *args, **kwargs):
726
self._approvals_pending = 0
727
self.bus = bus
728
Client.__init__(self, *args, **kwargs)
729
# Only now, when this client is initialized, can it show up on
730
# the D-Bus
731
client_object_name = unicode(self.name).translate(
732
{ord(u"."): ord(u"_"),
733
ord(u"-"): ord(u"_")})
734
self.dbus_object_path = (dbus.ObjectPath
735
(u"/clients/" + client_object_name))
736
DBusObjectWithProperties.__init__(self, self.bus,
737
self.dbus_object_path)
738
739
def _get_approvals_pending(self):
740
return self._approvals_pending
741
def _set_approvals_pending(self, value):
742
old_value = self._approvals_pending
743
self._approvals_pending = value
744
bval = bool(value)
745
if (hasattr(self, "dbus_object_path")
746
and bval is not bool(old_value)):
747
dbus_bool = dbus.Boolean(bval, variant_level=1)
748
self.PropertyChanged(dbus.String(u"ApprovalPending"),
749
dbus_bool)
750
751
approvals_pending = property(_get_approvals_pending,
752
_set_approvals_pending)
753
del _get_approvals_pending, _set_approvals_pending
754
755
@staticmethod
756
def _datetime_to_dbus(dt, variant_level=0):
757
"""Convert a UTC datetime.datetime() to a D-Bus type."""
758
return dbus.String(dt.isoformat(),
759
variant_level=variant_level)
760
761
def enable(self):
762
oldstate = getattr(self, u"enabled", False)
763
r = Client.enable(self)
764
if oldstate != self.enabled:
765
# Emit D-Bus signals
766
self.PropertyChanged(dbus.String(u"Enabled"),
767
dbus.Boolean(True, variant_level=1))
768
self.PropertyChanged(
769
dbus.String(u"LastEnabled"),
770
self._datetime_to_dbus(self.last_enabled,
771
variant_level=1))
772
return r
773
774
def disable(self, quiet = False):
775
oldstate = getattr(self, u"enabled", False)
776
r = Client.disable(self, quiet=quiet)
777
if not quiet and oldstate != self.enabled:
778
# Emit D-Bus signal
779
self.PropertyChanged(dbus.String(u"Enabled"),
780
dbus.Boolean(False, variant_level=1))
781
return r
782
783
def __del__(self, *args, **kwargs):
784
try:
785
self.remove_from_connection()
786
except LookupError:
787
pass
788
if hasattr(DBusObjectWithProperties, u"__del__"):
789
DBusObjectWithProperties.__del__(self, *args, **kwargs)
790
Client.__del__(self, *args, **kwargs)
791
792
def checker_callback(self, pid, condition, command,
793
*args, **kwargs):
794
self.checker_callback_tag = None
795
self.checker = None
796
# Emit D-Bus signal
797
self.PropertyChanged(dbus.String(u"CheckerRunning"),
798
dbus.Boolean(False, variant_level=1))
799
if os.WIFEXITED(condition):
800
exitstatus = os.WEXITSTATUS(condition)
801
# Emit D-Bus signal
802
self.CheckerCompleted(dbus.Int16(exitstatus),
803
dbus.Int64(condition),
804
dbus.String(command))
805
else:
806
# Emit D-Bus signal
807
self.CheckerCompleted(dbus.Int16(-1),
808
dbus.Int64(condition),
809
dbus.String(command))
810
811
return Client.checker_callback(self, pid, condition, command,
812
*args, **kwargs)
813
814
def checked_ok(self, *args, **kwargs):
815
r = Client.checked_ok(self, *args, **kwargs)
816
# Emit D-Bus signal
817
self.PropertyChanged(
818
dbus.String(u"LastCheckedOK"),
819
(self._datetime_to_dbus(self.last_checked_ok,
820
variant_level=1)))
821
return r
822
823
def need_approval(self, *args, **kwargs):
824
r = Client.need_approval(self, *args, **kwargs)
825
# Emit D-Bus signal
826
self.PropertyChanged(
827
dbus.String(u"LastApprovalRequest"),
828
(self._datetime_to_dbus(self.last_approval_request,
829
variant_level=1)))
830
return r
831
832
def start_checker(self, *args, **kwargs):
833
old_checker = self.checker
834
if self.checker is not None:
835
old_checker_pid = self.checker.pid
836
else:
837
old_checker_pid = None
838
r = Client.start_checker(self, *args, **kwargs)
839
# Only if new checker process was started
840
if (self.checker is not None
841
and old_checker_pid != self.checker.pid):
842
# Emit D-Bus signal
843
self.CheckerStarted(self.current_checker_command)
844
self.PropertyChanged(
845
dbus.String(u"CheckerRunning"),
846
dbus.Boolean(True, variant_level=1))
847
return r
848
849
def stop_checker(self, *args, **kwargs):
850
old_checker = getattr(self, u"checker", None)
851
r = Client.stop_checker(self, *args, **kwargs)
852
if (old_checker is not None
853
and getattr(self, u"checker", None) is None):
854
self.PropertyChanged(dbus.String(u"CheckerRunning"),
855
dbus.Boolean(False, variant_level=1))
856
return r
857
858
def _reset_approved(self):
859
self._approved = None
860
return False
861
862
def approve(self, value=True):
863
self.send_changedstate()
864
self._approved = value
865
gobject.timeout_add(self._timedelta_to_milliseconds
866
(self.approval_duration),
867
self._reset_approved)
868
869
870
## D-Bus methods, signals & properties
871
_interface = u"se.bsnet.fukt.Mandos.Client"
872
873
## Signals
874
875
# CheckerCompleted - signal
876
@dbus.service.signal(_interface, signature=u"nxs")
877
def CheckerCompleted(self, exitcode, waitstatus, command):
878
"D-Bus signal"
879
pass
880
881
# CheckerStarted - signal
882
@dbus.service.signal(_interface, signature=u"s")
883
def CheckerStarted(self, command):
884
"D-Bus signal"
885
pass
886
887
# PropertyChanged - signal
888
@dbus.service.signal(_interface, signature=u"sv")
889
def PropertyChanged(self, property, value):
890
"D-Bus signal"
891
pass
892
893
# GotSecret - signal
894
@dbus.service.signal(_interface)
895
def GotSecret(self):
896
"""D-Bus signal
897
Is sent after a successful transfer of secret from the Mandos
898
server to mandos-client
899
"""
900
pass
901
902
# Rejected - signal
903
@dbus.service.signal(_interface, signature=u"s")
904
def Rejected(self, reason):
905
"D-Bus signal"
906
pass
907
908
# NeedApproval - signal
909
@dbus.service.signal(_interface, signature=u"tb")
910
def NeedApproval(self, timeout, default):
911
"D-Bus signal"
912
return self.need_approval()
913
914
## Methods
915
916
# Approve - method
917
@dbus.service.method(_interface, in_signature=u"b")
918
def Approve(self, value):
919
self.approve(value)
920
921
# CheckedOK - method
922
@dbus.service.method(_interface)
923
def CheckedOK(self):
924
return self.checked_ok()
925
926
# Enable - method
927
@dbus.service.method(_interface)
928
def Enable(self):
929
"D-Bus method"
930
self.enable()
931
932
# StartChecker - method
933
@dbus.service.method(_interface)
934
def StartChecker(self):
935
"D-Bus method"
936
self.start_checker()
937
938
# Disable - method
939
@dbus.service.method(_interface)
940
def Disable(self):
941
"D-Bus method"
942
self.disable()
943
944
# StopChecker - method
945
@dbus.service.method(_interface)
946
def StopChecker(self):
947
self.stop_checker()
948
949
## Properties
950
951
# ApprovalPending - property
952
@dbus_service_property(_interface, signature=u"b", access=u"read")
953
def ApprovalPending_dbus_property(self):
954
return dbus.Boolean(bool(self.approvals_pending))
955
956
# ApprovedByDefault - property
957
@dbus_service_property(_interface, signature=u"b",
958
access=u"readwrite")
959
def ApprovedByDefault_dbus_property(self, value=None):
960
if value is None: # get
961
return dbus.Boolean(self.approved_by_default)
962
self.approved_by_default = bool(value)
963
# Emit D-Bus signal
964
self.PropertyChanged(dbus.String(u"ApprovedByDefault"),
965
dbus.Boolean(value, variant_level=1))
966
967
# ApprovalDelay - property
968
@dbus_service_property(_interface, signature=u"t",
969
access=u"readwrite")
970
def ApprovalDelay_dbus_property(self, value=None):
971
if value is None: # get
972
return dbus.UInt64(self.approval_delay_milliseconds())
973
self.approval_delay = datetime.timedelta(0, 0, 0, value)
974
# Emit D-Bus signal
975
self.PropertyChanged(dbus.String(u"ApprovalDelay"),
976
dbus.UInt64(value, variant_level=1))
977
978
# ApprovalDuration - property
979
@dbus_service_property(_interface, signature=u"t",
980
access=u"readwrite")
981
def ApprovalDuration_dbus_property(self, value=None):
982
if value is None: # get
983
return dbus.UInt64(self._timedelta_to_milliseconds(
984
self.approval_duration))
985
self.approval_duration = datetime.timedelta(0, 0, 0, value)
986
# Emit D-Bus signal
987
self.PropertyChanged(dbus.String(u"ApprovalDuration"),
988
dbus.UInt64(value, variant_level=1))
989
990
# Name - property
991
@dbus_service_property(_interface, signature=u"s", access=u"read")
992
def Name_dbus_property(self):
993
return dbus.String(self.name)
994
995
# Fingerprint - property
996
@dbus_service_property(_interface, signature=u"s", access=u"read")
997
def Fingerprint_dbus_property(self):
998
return dbus.String(self.fingerprint)
999
1000
# Host - property
1001
@dbus_service_property(_interface, signature=u"s",
1002
access=u"readwrite")
1003
def Host_dbus_property(self, value=None):
1004
if value is None: # get
1005
return dbus.String(self.host)
1006
self.host = value
1007
# Emit D-Bus signal
1008
self.PropertyChanged(dbus.String(u"Host"),
1009
dbus.String(value, variant_level=1))
1010
1011
# Created - property
1012
@dbus_service_property(_interface, signature=u"s", access=u"read")
1013
def Created_dbus_property(self):
1014
return dbus.String(self._datetime_to_dbus(self.created))
1015
1016
# LastEnabled - property
1017
@dbus_service_property(_interface, signature=u"s", access=u"read")
1018
def LastEnabled_dbus_property(self):
1019
if self.last_enabled is None:
1020
return dbus.String(u"")
1021
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1022
1023
# Enabled - property
1024
@dbus_service_property(_interface, signature=u"b",
1025
access=u"readwrite")
1026
def Enabled_dbus_property(self, value=None):
1027
if value is None: # get
1028
return dbus.Boolean(self.enabled)
1029
if value:
1030
self.enable()
1031
else:
1032
self.disable()
1033
1034
# LastCheckedOK - property
1035
@dbus_service_property(_interface, signature=u"s",
1036
access=u"readwrite")
1037
def LastCheckedOK_dbus_property(self, value=None):
1038
if value is not None:
1039
self.checked_ok()
1040
return
366
1041
if self.last_checked_ok is None:
367
return now < (self.created + self.timeout)
368
else:
369
return now < (self.last_checked_ok + self.timeout)
370
371
372
def peer_certificate(session):
373
"Return the peer's OpenPGP certificate as a bytestring"
374
# If not an OpenPGP certificate...
375
if gnutls.library.functions.gnutls_certificate_type_get\
376
(session._c_object) \
377
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
378
# ...do the normal thing
379
return session.peer_certificate
380
list_size = ctypes.c_uint()
381
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
382
(session._c_object, ctypes.byref(list_size))
383
if list_size.value == 0:
384
return None
385
cert = cert_list[0]
386
return ctypes.string_at(cert.data, cert.size)
387
388
389
def fingerprint(openpgp):
390
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
391
# New GnuTLS "datum" with the OpenPGP public key
392
datum = gnutls.library.types.gnutls_datum_t\
393
(ctypes.cast(ctypes.c_char_p(openpgp),
394
ctypes.POINTER(ctypes.c_ubyte)),
395
ctypes.c_uint(len(openpgp)))
396
# New empty GnuTLS certificate
397
crt = gnutls.library.types.gnutls_openpgp_crt_t()
398
gnutls.library.functions.gnutls_openpgp_crt_init\
399
(ctypes.byref(crt))
400
# Import the OpenPGP public key into the certificate
401
gnutls.library.functions.gnutls_openpgp_crt_import\
402
(crt, ctypes.byref(datum),
403
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
404
# New buffer for the fingerprint
405
buffer = ctypes.create_string_buffer(20)
406
buffer_length = ctypes.c_size_t()
407
# Get the fingerprint from the certificate into the buffer
408
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
409
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
410
# Deinit the certificate
411
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
412
# Convert the buffer to a Python bytestring
413
fpr = ctypes.string_at(buffer, buffer_length.value)
414
# Convert the bytestring to hexadecimal notation
415
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
416
return hex_fpr
417
418
419
class tcp_handler(SocketServer.BaseRequestHandler, object):
420
"""A TCP request handler class.
421
Instantiated by IPv6_TCPServer for each request to handle it.
1042
return dbus.String(u"")
1043
return dbus.String(self._datetime_to_dbus(self
1044
.last_checked_ok))
1045
1046
# LastApprovalRequest - property
1047
@dbus_service_property(_interface, signature=u"s", access=u"read")
1048
def LastApprovalRequest_dbus_property(self):
1049
if self.last_approval_request is None:
1050
return dbus.String(u"")
1051
return dbus.String(self.
1052
_datetime_to_dbus(self
1053
.last_approval_request))
1054
1055
# Timeout - property
1056
@dbus_service_property(_interface, signature=u"t",
1057
access=u"readwrite")
1058
def Timeout_dbus_property(self, value=None):
1059
if value is None: # get
1060
return dbus.UInt64(self.timeout_milliseconds())
1061
self.timeout = datetime.timedelta(0, 0, 0, value)
1062
# Emit D-Bus signal
1063
self.PropertyChanged(dbus.String(u"Timeout"),
1064
dbus.UInt64(value, variant_level=1))
1065
if getattr(self, u"disable_initiator_tag", None) is None:
1066
return
1067
# Reschedule timeout
1068
gobject.source_remove(self.disable_initiator_tag)
1069
self.disable_initiator_tag = None
1070
time_to_die = (self.
1071
_timedelta_to_milliseconds((self
1072
.last_checked_ok
1073
+ self.timeout)
1074
- datetime.datetime
1075
.utcnow()))
1076
if time_to_die <= 0:
1077
# The timeout has passed
1078
self.disable()
1079
else:
1080
self.disable_initiator_tag = (gobject.timeout_add
1081
(time_to_die, self.disable))
1082
1083
# Interval - property
1084
@dbus_service_property(_interface, signature=u"t",
1085
access=u"readwrite")
1086
def Interval_dbus_property(self, value=None):
1087
if value is None: # get
1088
return dbus.UInt64(self.interval_milliseconds())
1089
self.interval = datetime.timedelta(0, 0, 0, value)
1090
# Emit D-Bus signal
1091
self.PropertyChanged(dbus.String(u"Interval"),
1092
dbus.UInt64(value, variant_level=1))
1093
if getattr(self, u"checker_initiator_tag", None) is None:
1094
return
1095
# Reschedule checker run
1096
gobject.source_remove(self.checker_initiator_tag)
1097
self.checker_initiator_tag = (gobject.timeout_add
1098
(value, self.start_checker))
1099
self.start_checker() # Start one now, too
1100
1101
# Checker - property
1102
@dbus_service_property(_interface, signature=u"s",
1103
access=u"readwrite")
1104
def Checker_dbus_property(self, value=None):
1105
if value is None: # get
1106
return dbus.String(self.checker_command)
1107
self.checker_command = value
1108
# Emit D-Bus signal
1109
self.PropertyChanged(dbus.String(u"Checker"),
1110
dbus.String(self.checker_command,
1111
variant_level=1))
1112
1113
# CheckerRunning - property
1114
@dbus_service_property(_interface, signature=u"b",
1115
access=u"readwrite")
1116
def CheckerRunning_dbus_property(self, value=None):
1117
if value is None: # get
1118
return dbus.Boolean(self.checker is not None)
1119
if value:
1120
self.start_checker()
1121
else:
1122
self.stop_checker()
1123
1124
# ObjectPath - property
1125
@dbus_service_property(_interface, signature=u"o", access=u"read")
1126
def ObjectPath_dbus_property(self):
1127
return self.dbus_object_path # is already a dbus.ObjectPath
1128
1129
# Secret = property
1130
@dbus_service_property(_interface, signature=u"ay",
1131
access=u"write", byte_arrays=True)
1132
def Secret_dbus_property(self, value):
1133
self.secret = str(value)
1134
1135
del _interface
1136
1137
1138
class ProxyClient(object):
1139
def __init__(self, child_pipe, fpr, address):
1140
self._pipe = child_pipe
1141
self._pipe.send(('init', fpr, address))
1142
if not self._pipe.recv():
1143
raise KeyError()
1144
1145
def __getattribute__(self, name):
1146
if(name == '_pipe'):
1147
return super(ProxyClient, self).__getattribute__(name)
1148
self._pipe.send(('getattr', name))
1149
data = self._pipe.recv()
1150
if data[0] == 'data':
1151
return data[1]
1152
if data[0] == 'function':
1153
def func(*args, **kwargs):
1154
self._pipe.send(('funcall', name, args, kwargs))
1155
return self._pipe.recv()[1]
1156
return func
1157
1158
def __setattr__(self, name, value):
1159
if(name == '_pipe'):
1160
return super(ProxyClient, self).__setattr__(name, value)
1161
self._pipe.send(('setattr', name, value))
1162
1163
1164
class ClientHandler(socketserver.BaseRequestHandler, object):
1165
"""A class to handle client connections.
1166
1167
Instantiated once for each connection to handle it.
422
1168
Note: This will run in its own forked process."""
423
1169
424
1170
def handle(self):
425
logger.info(u"TCP connection from: %s",
426
unicode(self.client_address))
427
session = gnutls.connection.ClientSession\
428
(self.request, gnutls.connection.X509Credentials())
429
430
line = self.request.makefile().readline()
431
logger.debug(u"Protocol version: %r", line)
432
try:
433
if int(line.strip().split()[0]) > 1:
434
raise RuntimeError
435
except (ValueError, IndexError, RuntimeError), error:
436
logger.error(u"Unknown protocol version: %s", error)
437
return
438
439
# Note: gnutls.connection.X509Credentials is really a generic
440
# GnuTLS certificate credentials object so long as no X.509
441
# keys are added to it. Therefore, we can use it here despite
442
# using OpenPGP certificates.
443
444
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
445
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
446
# "+DHE-DSS"))
447
priority = "NORMAL" # Fallback default, since this
448
# MUST be set.
449
if self.server.settings["priority"]:
450
priority = self.server.settings["priority"]
451
gnutls.library.functions.gnutls_priority_set_direct\
452
(session._c_object, priority, None);
453
454
try:
455
session.handshake()
456
except gnutls.errors.GNUTLSError, error:
457
logger.warning(u"Handshake failed: %s", error)
458
# Do not run session.bye() here: the session is not
459
# established. Just abandon the request.
460
return
461
try:
462
fpr = fingerprint(peer_certificate(session))
463
except (TypeError, gnutls.errors.GNUTLSError), error:
464
logger.warning(u"Bad certificate: %s", error)
465
session.bye()
466
return
467
logger.debug(u"Fingerprint: %s", fpr)
468
client = None
469
for c in self.server.clients:
470
if c.fingerprint == fpr:
471
client = c
472
break
473
if not client:
474
logger.warning(u"Client not found for fingerprint: %s",
475
fpr)
476
session.bye()
477
return
478
# Have to check if client.still_valid(), since it is possible
479
# that the client timed out while establishing the GnuTLS
480
# session.
481
if not client.still_valid():
482
logger.warning(u"Client %(name)s is invalid",
483
vars(client))
484
session.bye()
485
return
486
sent_size = 0
487
while sent_size < len(client.secret):
488
sent = session.send(client.secret[sent_size:])
489
logger.debug(u"Sent: %d, remaining: %d",
490
sent, len(client.secret)
491
- (sent_size + sent))
492
sent_size += sent
493
session.bye()
494
495
496
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
497
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1171
with contextlib.closing(self.server.child_pipe) as child_pipe:
1172
logger.info(u"TCP connection from: %s",
1173
unicode(self.client_address))
1174
logger.debug(u"Pipe FD: %d",
1175
self.server.child_pipe.fileno())
1176
1177
session = (gnutls.connection
1178
.ClientSession(self.request,
1179
gnutls.connection
1180
.X509Credentials()))
1181
1182
# Note: gnutls.connection.X509Credentials is really a
1183
# generic GnuTLS certificate credentials object so long as
1184
# no X.509 keys are added to it. Therefore, we can use it
1185
# here despite using OpenPGP certificates.
1186
1187
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1188
# u"+AES-256-CBC", u"+SHA1",
1189
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1190
# u"+DHE-DSS"))
1191
# Use a fallback default, since this MUST be set.
1192
priority = self.server.gnutls_priority
1193
if priority is None:
1194
priority = u"NORMAL"
1195
(gnutls.library.functions
1196
.gnutls_priority_set_direct(session._c_object,
1197
priority, None))
1198
1199
# Start communication using the Mandos protocol
1200
# Get protocol number
1201
line = self.request.makefile().readline()
1202
logger.debug(u"Protocol version: %r", line)
1203
try:
1204
if int(line.strip().split()[0]) > 1:
1205
raise RuntimeError
1206
except (ValueError, IndexError, RuntimeError), error:
1207
logger.error(u"Unknown protocol version: %s", error)
1208
return
1209
1210
# Start GnuTLS connection
1211
try:
1212
session.handshake()
1213
except gnutls.errors.GNUTLSError, error:
1214
logger.warning(u"Handshake failed: %s", error)
1215
# Do not run session.bye() here: the session is not
1216
# established. Just abandon the request.
1217
return
1218
logger.debug(u"Handshake succeeded")
1219
1220
approval_required = False
1221
try:
1222
try:
1223
fpr = self.fingerprint(self.peer_certificate
1224
(session))
1225
except (TypeError, gnutls.errors.GNUTLSError), error:
1226
logger.warning(u"Bad certificate: %s", error)
1227
return
1228
logger.debug(u"Fingerprint: %s", fpr)
1229
1230
try:
1231
client = ProxyClient(child_pipe, fpr,
1232
self.client_address)
1233
except KeyError:
1234
return
1235
1236
if client.approval_delay:
1237
delay = client.approval_delay
1238
client.approvals_pending += 1
1239
approval_required = True
1240
1241
while True:
1242
if not client.enabled:
1243
logger.warning(u"Client %s is disabled",
1244
client.name)
1245
if self.server.use_dbus:
1246
# Emit D-Bus signal
1247
client.Rejected("Disabled")
1248
return
1249
1250
if client._approved or not client.approval_delay:
1251
#We are approved or approval is disabled
1252
break
1253
elif client._approved is None:
1254
logger.info(u"Client %s needs approval",
1255
client.name)
1256
if self.server.use_dbus:
1257
# Emit D-Bus signal
1258
client.NeedApproval(
1259
client.approval_delay_milliseconds(),
1260
client.approved_by_default)
1261
else:
1262
logger.warning(u"Client %s was not approved",
1263
client.name)
1264
if self.server.use_dbus:
1265
# Emit D-Bus signal
1266
client.Rejected("Denied")
1267
return
1268
1269
#wait until timeout or approved
1270
#x = float(client._timedelta_to_milliseconds(delay))
1271
time = datetime.datetime.now()
1272
client.changedstate.acquire()
1273
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1274
client.changedstate.release()
1275
time2 = datetime.datetime.now()
1276
if (time2 - time) >= delay:
1277
if not client.approved_by_default:
1278
logger.warning("Client %s timed out while"
1279
" waiting for approval",
1280
client.name)
1281
if self.server.use_dbus:
1282
# Emit D-Bus signal
1283
client.Rejected("Approval timed out")
1284
return
1285
else:
1286
break
1287
else:
1288
delay -= time2 - time
1289
1290
sent_size = 0
1291
while sent_size < len(client.secret):
1292
try:
1293
sent = session.send(client.secret[sent_size:])
1294
except (gnutls.errors.GNUTLSError), error:
1295
logger.warning("gnutls send failed")
1296
return
1297
logger.debug(u"Sent: %d, remaining: %d",
1298
sent, len(client.secret)
1299
- (sent_size + sent))
1300
sent_size += sent
1301
1302
logger.info(u"Sending secret to %s", client.name)
1303
# bump the timeout as if seen
1304
client.checked_ok()
1305
if self.server.use_dbus:
1306
# Emit D-Bus signal
1307
client.GotSecret()
1308
1309
finally:
1310
if approval_required:
1311
client.approvals_pending -= 1
1312
try:
1313
session.bye()
1314
except (gnutls.errors.GNUTLSError), error:
1315
logger.warning("GnuTLS bye failed")
1316
1317
@staticmethod
1318
def peer_certificate(session):
1319
"Return the peer's OpenPGP certificate as a bytestring"
1320
# If not an OpenPGP certificate...
1321
if (gnutls.library.functions
1322
.gnutls_certificate_type_get(session._c_object)
1323
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1324
# ...do the normal thing
1325
return session.peer_certificate
1326
list_size = ctypes.c_uint(1)
1327
cert_list = (gnutls.library.functions
1328
.gnutls_certificate_get_peers
1329
(session._c_object, ctypes.byref(list_size)))
1330
if not bool(cert_list) and list_size.value != 0:
1331
raise gnutls.errors.GNUTLSError(u"error getting peer"
1332
u" certificate")
1333
if list_size.value == 0:
1334
return None
1335
cert = cert_list[0]
1336
return ctypes.string_at(cert.data, cert.size)
1337
1338
@staticmethod
1339
def fingerprint(openpgp):
1340
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1341
# New GnuTLS "datum" with the OpenPGP public key
1342
datum = (gnutls.library.types
1343
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1344
ctypes.POINTER
1345
(ctypes.c_ubyte)),
1346
ctypes.c_uint(len(openpgp))))
1347
# New empty GnuTLS certificate
1348
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1349
(gnutls.library.functions
1350
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1351
# Import the OpenPGP public key into the certificate
1352
(gnutls.library.functions
1353
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1354
gnutls.library.constants
1355
.GNUTLS_OPENPGP_FMT_RAW))
1356
# Verify the self signature in the key
1357
crtverify = ctypes.c_uint()
1358
(gnutls.library.functions
1359
.gnutls_openpgp_crt_verify_self(crt, 0,
1360
ctypes.byref(crtverify)))
1361
if crtverify.value != 0:
1362
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1363
raise (gnutls.errors.CertificateSecurityError
1364
(u"Verify failed"))
1365
# New buffer for the fingerprint
1366
buf = ctypes.create_string_buffer(20)
1367
buf_len = ctypes.c_size_t()
1368
# Get the fingerprint from the certificate into the buffer
1369
(gnutls.library.functions
1370
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1371
ctypes.byref(buf_len)))
1372
# Deinit the certificate
1373
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1374
# Convert the buffer to a Python bytestring
1375
fpr = ctypes.string_at(buf, buf_len.value)
1376
# Convert the bytestring to hexadecimal notation
1377
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1378
return hex_fpr
1379
1380
1381
class MultiprocessingMixIn(object):
1382
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1383
def sub_process_main(self, request, address):
1384
try:
1385
self.finish_request(request, address)
1386
except:
1387
self.handle_error(request, address)
1388
self.close_request(request)
1389
1390
def process_request(self, request, address):
1391
"""Start a new process to process the request."""
1392
multiprocessing.Process(target = self.sub_process_main,
1393
args = (request, address)).start()
1394
1395
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1396
""" adds a pipe to the MixIn """
1397
def process_request(self, request, client_address):
1398
"""Overrides and wraps the original process_request().
1399
1400
This function creates a new pipe in self.pipe
1401
"""
1402
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1403
1404
super(MultiprocessingMixInWithPipe,
1405
self).process_request(request, client_address)
1406
self.child_pipe.close()
1407
self.add_pipe(parent_pipe)
1408
1409
def add_pipe(self, parent_pipe):
1410
"""Dummy function; override as necessary"""
1411
pass
1412
1413
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1414
socketserver.TCPServer, object):
1415
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1416
498
1417
Attributes:
499
settings: Server settings
500
clients: Set() of Client objects
1418
enabled: Boolean; whether this server is activated yet
1419
interface: None or a network interface name (string)
1420
use_ipv6: Boolean; to use IPv6 or not
501
1421
"""
502
address_family = socket.AF_INET6
503
def __init__(self, *args, **kwargs):
504
if "settings" in kwargs:
505
self.settings = kwargs["settings"]
506
del kwargs["settings"]
507
if "clients" in kwargs:
508
self.clients = kwargs["clients"]
509
del kwargs["clients"]
510
return super(type(self), self).__init__(*args, **kwargs)
1422
def __init__(self, server_address, RequestHandlerClass,
1423
interface=None, use_ipv6=True):
1424
self.interface = interface
1425
if use_ipv6:
1426
self.address_family = socket.AF_INET6
1427
socketserver.TCPServer.__init__(self, server_address,
1428
RequestHandlerClass)
511
1429
def server_bind(self):
512
1430
"""This overrides the normal server_bind() function
513
1431
to bind to an interface if one was specified, and also NOT to
514
1432
bind to an address or port if they were not specified."""
515
if self.settings["interface"]:
516
# 25 is from /usr/include/asm-i486/socket.h
517
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
518
try:
519
self.socket.setsockopt(socket.SOL_SOCKET,
520
SO_BINDTODEVICE,
521
self.settings["interface"])
522
except socket.error, error:
523
if error[0] == errno.EPERM:
524
logger.error(u"No permission to"
525
u" bind to interface %s",
526
self.settings["interface"])
527
else:
528
raise error
1433
if self.interface is not None:
1434
if SO_BINDTODEVICE is None:
1435
logger.error(u"SO_BINDTODEVICE does not exist;"
1436
u" cannot bind to interface %s",
1437
self.interface)
1438
else:
1439
try:
1440
self.socket.setsockopt(socket.SOL_SOCKET,
1441
SO_BINDTODEVICE,
1442
str(self.interface
1443
+ u'\0'))
1444
except socket.error, error:
1445
if error[0] == errno.EPERM:
1446
logger.error(u"No permission to"
1447
u" bind to interface %s",
1448
self.interface)
1449
elif error[0] == errno.ENOPROTOOPT:
1450
logger.error(u"SO_BINDTODEVICE not available;"
1451
u" cannot bind to interface %s",
1452
self.interface)
1453
else:
1454
raise
529
1455
# Only bind(2) the socket if we really need to.
530
1456
if self.server_address[0] or self.server_address[1]:
531
1457
if not self.server_address[0]:
532
in6addr_any = "::"
533
self.server_address = (in6addr_any,
1458
if self.address_family == socket.AF_INET6:
1459
any_address = u"::" # in6addr_any
1460
else:
1461
any_address = socket.INADDR_ANY
1462
self.server_address = (any_address,
534
1463
self.server_address[1])
535
1464
elif not self.server_address[1]:
536
1465
self.server_address = (self.server_address[0],
537
1466
0)
538
# if self.settings["interface"]:
1467
# if self.interface:
539
1468
# self.server_address = (self.server_address[0],
540
1469
# 0, # port
541
1470
# 0, # flowinfo
542
1471
# if_nametoindex
543
# (self.settings
544
# ["interface"]))
545
return super(type(self), self).server_bind()
1472
# (self.interface))
1473
return socketserver.TCPServer.server_bind(self)
1474
1475
1476
class MandosServer(IPv6_TCPServer):
1477
"""Mandos server.
1478
1479
Attributes:
1480
clients: set of Client objects
1481
gnutls_priority GnuTLS priority string
1482
use_dbus: Boolean; to emit D-Bus signals or not
1483
1484
Assumes a gobject.MainLoop event loop.
1485
"""
1486
def __init__(self, server_address, RequestHandlerClass,
1487
interface=None, use_ipv6=True, clients=None,
1488
gnutls_priority=None, use_dbus=True):
1489
self.enabled = False
1490
self.clients = clients
1491
if self.clients is None:
1492
self.clients = set()
1493
self.use_dbus = use_dbus
1494
self.gnutls_priority = gnutls_priority
1495
IPv6_TCPServer.__init__(self, server_address,
1496
RequestHandlerClass,
1497
interface = interface,
1498
use_ipv6 = use_ipv6)
1499
def server_activate(self):
1500
if self.enabled:
1501
return socketserver.TCPServer.server_activate(self)
1502
def enable(self):
1503
self.enabled = True
1504
def add_pipe(self, parent_pipe):
1505
# Call "handle_ipc" for both data and EOF events
1506
gobject.io_add_watch(parent_pipe.fileno(),
1507
gobject.IO_IN | gobject.IO_HUP,
1508
functools.partial(self.handle_ipc,
1509
parent_pipe = parent_pipe))
1510
1511
def handle_ipc(self, source, condition, parent_pipe=None,
1512
client_object=None):
1513
condition_names = {
1514
gobject.IO_IN: u"IN", # There is data to read.
1515
gobject.IO_OUT: u"OUT", # Data can be written (without
1516
# blocking).
1517
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1518
gobject.IO_ERR: u"ERR", # Error condition.
1519
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1520
# broken, usually for pipes and
1521
# sockets).
1522
}
1523
conditions_string = ' | '.join(name
1524
for cond, name in
1525
condition_names.iteritems()
1526
if cond & condition)
1527
# error or the other end of multiprocessing.Pipe has closed
1528
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1529
return False
1530
1531
# Read a request from the child
1532
request = parent_pipe.recv()
1533
command = request[0]
1534
1535
if command == 'init':
1536
fpr = request[1]
1537
address = request[2]
1538
1539
for c in self.clients:
1540
if c.fingerprint == fpr:
1541
client = c
1542
break
1543
else:
1544
logger.warning(u"Client not found for fingerprint: %s, ad"
1545
u"dress: %s", fpr, address)
1546
if self.use_dbus:
1547
# Emit D-Bus signal
1548
mandos_dbus_service.ClientNotFound(fpr, address[0])
1549
parent_pipe.send(False)
1550
return False
1551
1552
gobject.io_add_watch(parent_pipe.fileno(),
1553
gobject.IO_IN | gobject.IO_HUP,
1554
functools.partial(self.handle_ipc,
1555
parent_pipe = parent_pipe,
1556
client_object = client))
1557
parent_pipe.send(True)
1558
# remove the old hook in favor of the new above hook on same fileno
1559
return False
1560
if command == 'funcall':
1561
funcname = request[1]
1562
args = request[2]
1563
kwargs = request[3]
1564
1565
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1566
1567
if command == 'getattr':
1568
attrname = request[1]
1569
if callable(client_object.__getattribute__(attrname)):
1570
parent_pipe.send(('function',))
1571
else:
1572
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1573
1574
if command == 'setattr':
1575
attrname = request[1]
1576
value = request[2]
1577
setattr(client_object, attrname, value)
1578
1579
return True
546
1580
547
1581
548
1582
def string_to_delta(interval):
549
1583
"""Parse a string and return a datetime.timedelta
550
551
>>> string_to_delta('7d')
1584
1585
>>> string_to_delta(u'7d')
552
1586
datetime.timedelta(7)
553
>>> string_to_delta('60s')
1587
>>> string_to_delta(u'60s')
554
1588
datetime.timedelta(0, 60)
555
>>> string_to_delta('60m')
1589
>>> string_to_delta(u'60m')
556
1590
datetime.timedelta(0, 3600)
557
>>> string_to_delta('24h')
1591
>>> string_to_delta(u'24h')
558
1592
datetime.timedelta(1)
559
1593
>>> string_to_delta(u'1w')
560
1594
datetime.timedelta(7)
1595
>>> string_to_delta(u'5m 30s')
1596
datetime.timedelta(0, 330)
561
1597
"""
562
try:
563
suffix=unicode(interval[-1])
564
value=int(interval[:-1])
565
if suffix == u"d":
566
delta = datetime.timedelta(value)
567
elif suffix == u"s":
568
delta = datetime.timedelta(0, value)
569
elif suffix == u"m":
570
delta = datetime.timedelta(0, 0, 0, 0, value)
571
elif suffix == u"h":
572
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
573
elif suffix == u"w":
574
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
575
else:
576
raise ValueError
577
except (ValueError, IndexError):
578
raise ValueError
579
return delta
580
581
582
def server_state_changed(state):
583
"""Derived from the Avahi example code"""
584
if state == avahi.SERVER_COLLISION:
585
logger.error(u"Server name collision")
586
service.remove()
587
elif state == avahi.SERVER_RUNNING:
588
service.add()
589
590
591
def entry_group_state_changed(state, error):
592
"""Derived from the Avahi example code"""
593
logger.debug(u"state change: %i", state)
594
595
if state == avahi.ENTRY_GROUP_ESTABLISHED:
596
logger.debug(u"Service established.")
597
elif state == avahi.ENTRY_GROUP_COLLISION:
598
logger.warning(u"Service name collision.")
599
service.rename()
600
elif state == avahi.ENTRY_GROUP_FAILURE:
601
logger.critical(u"Error in group state changed %s",
602
unicode(error))
603
raise AvahiGroupError("State changed: %s", str(error))
1598
timevalue = datetime.timedelta(0)
1599
for s in interval.split():
1600
try:
1601
suffix = unicode(s[-1])
1602
value = int(s[:-1])
1603
if suffix == u"d":
1604
delta = datetime.timedelta(value)
1605
elif suffix == u"s":
1606
delta = datetime.timedelta(0, value)
1607
elif suffix == u"m":
1608
delta = datetime.timedelta(0, 0, 0, 0, value)
1609
elif suffix == u"h":
1610
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1611
elif suffix == u"w":
1612
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1613
else:
1614
raise ValueError(u"Unknown suffix %r" % suffix)
1615
except (ValueError, IndexError), e:
1616
raise ValueError(e.message)
1617
timevalue += delta
1618
return timevalue
1619
604
1620
605
1621
def if_nametoindex(interface):
606
"""Call the C function if_nametoindex(), or equivalent"""
1622
"""Call the C function if_nametoindex(), or equivalent
1623
1624
Note: This function cannot accept a unicode string."""
607
1625
global if_nametoindex
608
1626
try:
609
if "ctypes.util" not in sys.modules:
610
import ctypes.util
611
if_nametoindex = ctypes.cdll.LoadLibrary\
612
(ctypes.util.find_library("c")).if_nametoindex
1627
if_nametoindex = (ctypes.cdll.LoadLibrary
1628
(ctypes.util.find_library(u"c"))
1629
.if_nametoindex)
613
1630
except (OSError, AttributeError):
614
if "struct" not in sys.modules:
615
import struct
616
if "fcntl" not in sys.modules:
617
import fcntl
1631
logger.warning(u"Doing if_nametoindex the hard way")
618
1632
def if_nametoindex(interface):
619
1633
"Get an interface index the hard way, i.e. using fcntl()"
620
1634
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
621
s = socket.socket()
622
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
623
struct.pack("16s16x", interface))
624
s.close()
625
interface_index = struct.unpack("I", ifreq[16:20])[0]
1635
with contextlib.closing(socket.socket()) as s:
1636
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1637
struct.pack(str(u"16s16x"),
1638
interface))
1639
interface_index = struct.unpack(str(u"I"),
1640
ifreq[16:20])[0]
626
1641
return interface_index
627
1642
return if_nametoindex(interface)
628
1643
629
1644
630
1645
def daemon(nochdir = False, noclose = False):
631
1646
"""See daemon(3). Standard BSD Unix function.
1647
632
1648
This should really exist as os.daemon, but it doesn't (yet)."""
633
1649
if os.fork():
634
1650
sys.exit()
635
1651
os.setsid()
636
1652
if not nochdir:
637
os.chdir("/")
1653
os.chdir(u"/")
638
1654
if os.fork():
639
1655
sys.exit()
640
1656
if not noclose:
642
1658
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
643
1659
if not stat.S_ISCHR(os.fstat(null).st_mode):
644
1660
raise OSError(errno.ENODEV,
645
"/dev/null not a character device")
1661
u"%s not a character device"
1662
% os.path.devnull)
646
1663
os.dup2(null, sys.stdin.fileno())
647
1664
os.dup2(null, sys.stdout.fileno())
648
1665
os.dup2(null, sys.stderr.fileno())
651
1668
652
1669
653
1670
def main():
654
global main_loop_started
655
main_loop_started = False
656
657
parser = OptionParser(version = "Mandos server %s" % version)
658
parser.add_option("-i", "--interface", type="string",
659
metavar="IF", help="Bind to interface IF")
660
parser.add_option("-a", "--address", type="string",
661
help="Address to listen for requests on")
662
parser.add_option("-p", "--port", type="int",
663
help="Port number to receive requests on")
664
parser.add_option("--check", action="store_true", default=False,
665
help="Run self-test")
666
parser.add_option("--debug", action="store_true",
667
help="Debug mode; run in foreground and log to"
668
" terminal")
669
parser.add_option("--priority", type="string", help="GnuTLS"
670
" priority string (see GnuTLS documentation)")
671
parser.add_option("--servicename", type="string", metavar="NAME",
672
help="Zeroconf service name")
673
parser.add_option("--configdir", type="string",
674
default="/etc/mandos", metavar="DIR",
675
help="Directory to search for configuration"
676
" files")
677
(options, args) = parser.parse_args()
1671
1672
##################################################################
1673
# Parsing of options, both command line and config file
1674
1675
parser = optparse.OptionParser(version = "%%prog %s" % version)
1676
parser.add_option("-i", u"--interface", type=u"string",
1677
metavar="IF", help=u"Bind to interface IF")
1678
parser.add_option("-a", u"--address", type=u"string",
1679
help=u"Address to listen for requests on")
1680
parser.add_option("-p", u"--port", type=u"int",
1681
help=u"Port number to receive requests on")
1682
parser.add_option("--check", action=u"store_true",
1683
help=u"Run self-test")
1684
parser.add_option("--debug", action=u"store_true",
1685
help=u"Debug mode; run in foreground and log to"
1686
u" terminal")
1687
parser.add_option("--debuglevel", type=u"string", metavar="LEVEL",
1688
help=u"Debug level for stdout output")
1689
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1690
u" priority string (see GnuTLS documentation)")
1691
parser.add_option("--servicename", type=u"string",
1692
metavar=u"NAME", help=u"Zeroconf service name")
1693
parser.add_option("--configdir", type=u"string",
1694
default=u"/etc/mandos", metavar=u"DIR",
1695
help=u"Directory to search for configuration"
1696
u" files")
1697
parser.add_option("--no-dbus", action=u"store_false",
1698
dest=u"use_dbus", help=u"Do not provide D-Bus"
1699
u" system bus interface")
1700
parser.add_option("--no-ipv6", action=u"store_false",
1701
dest=u"use_ipv6", help=u"Do not use IPv6")
1702
options = parser.parse_args()[0]
678
1703
679
1704
if options.check:
680
1705
import doctest
682
1707
sys.exit()
683
1708
684
1709
# Default values for config file for server-global settings
685
server_defaults = { "interface": "",
686
"address": "",
687
"port": "",
688
"debug": "False",
689
"priority":
690
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
691
"servicename": "Mandos",
1710
server_defaults = { u"interface": u"",
1711
u"address": u"",
1712
u"port": u"",
1713
u"debug": u"False",
1714
u"priority":
1715
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1716
u"servicename": u"Mandos",
1717
u"use_dbus": u"True",
1718
u"use_ipv6": u"True",
1719
u"debuglevel": u"",
692
1720
}
693
1721
694
1722
# Parse config file for server-global settings
695
server_config = ConfigParser.SafeConfigParser(server_defaults)
1723
server_config = configparser.SafeConfigParser(server_defaults)
696
1724
del server_defaults
697
server_config.read(os.path.join(options.configdir, "mandos.conf"))
698
server_section = "server"
1725
server_config.read(os.path.join(options.configdir,
1726
u"mandos.conf"))
699
1727
# Convert the SafeConfigParser object to a dict
700
server_settings = dict(server_config.items(server_section))
701
# Use getboolean on the boolean config option
702
server_settings["debug"] = server_config.getboolean\
703
(server_section, "debug")
1728
server_settings = server_config.defaults()
1729
# Use the appropriate methods on the non-string config options
1730
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1731
server_settings[option] = server_config.getboolean(u"DEFAULT",
1732
option)
1733
if server_settings["port"]:
1734
server_settings["port"] = server_config.getint(u"DEFAULT",
1735
u"port")
704
1736
del server_config
705
1737
706
1738
# Override the settings from the config file with command line
707
1739
# options, if set.
708
for option in ("interface", "address", "port", "debug",
709
"priority", "servicename", "configdir"):
1740
for option in (u"interface", u"address", u"port", u"debug",
1741
u"priority", u"servicename", u"configdir",
1742
u"use_dbus", u"use_ipv6", u"debuglevel"):
710
1743
value = getattr(options, option)
711
1744
if value is not None:
712
1745
server_settings[option] = value
713
1746
del options
1747
# Force all strings to be unicode
1748
for option in server_settings.keys():
1749
if type(server_settings[option]) is str:
1750
server_settings[option] = unicode(server_settings[option])
714
1751
# Now we have our good server settings in "server_settings"
715
1752
716
debug = server_settings["debug"]
717
1753
##################################################################
1754
1755
# For convenience
1756
debug = server_settings[u"debug"]
1757
debuglevel = server_settings[u"debuglevel"]
1758
use_dbus = server_settings[u"use_dbus"]
1759
use_ipv6 = server_settings[u"use_ipv6"]
1760
1761
if server_settings[u"servicename"] != u"Mandos":
1762
syslogger.setFormatter(logging.Formatter
1763
(u'Mandos (%s) [%%(process)d]:'
1764
u' %%(levelname)s: %%(message)s'
1765
% server_settings[u"servicename"]))
1766
1767
# Parse config file with clients
1768
client_defaults = { u"timeout": u"1h",
1769
u"interval": u"5m",
1770
u"checker": u"fping -q -- %%(host)s",
1771
u"host": u"",
1772
u"approval_delay": u"0s",
1773
u"approval_duration": u"1s",
1774
}
1775
client_config = configparser.SafeConfigParser(client_defaults)
1776
client_config.read(os.path.join(server_settings[u"configdir"],
1777
u"clients.conf"))
1778
1779
global mandos_dbus_service
1780
mandos_dbus_service = None
1781
1782
tcp_server = MandosServer((server_settings[u"address"],
1783
server_settings[u"port"]),
1784
ClientHandler,
1785
interface=(server_settings[u"interface"]
1786
or None),
1787
use_ipv6=use_ipv6,
1788
gnutls_priority=
1789
server_settings[u"priority"],
1790
use_dbus=use_dbus)
718
1791
if not debug:
1792
pidfilename = u"/var/run/mandos.pid"
1793
try:
1794
pidfile = open(pidfilename, u"w")
1795
except IOError:
1796
logger.error(u"Could not open file %r", pidfilename)
1797
1798
try:
1799
uid = pwd.getpwnam(u"_mandos").pw_uid
1800
gid = pwd.getpwnam(u"_mandos").pw_gid
1801
except KeyError:
1802
try:
1803
uid = pwd.getpwnam(u"mandos").pw_uid
1804
gid = pwd.getpwnam(u"mandos").pw_gid
1805
except KeyError:
1806
try:
1807
uid = pwd.getpwnam(u"nobody").pw_uid
1808
gid = pwd.getpwnam(u"nobody").pw_gid
1809
except KeyError:
1810
uid = 65534
1811
gid = 65534
1812
try:
1813
os.setgid(gid)
1814
os.setuid(uid)
1815
except OSError, error:
1816
if error[0] != errno.EPERM:
1817
raise error
1818
1819
if not debug and not debuglevel:
719
1820
syslogger.setLevel(logging.WARNING)
720
721
if server_settings["servicename"] != "Mandos":
722
syslogger.setFormatter(logging.Formatter\
723
('Mandos (%s): %%(levelname)s:'
724
' %%(message)s'
725
% server_settings["servicename"]))
726
727
# Parse config file with clients
728
client_defaults = { "timeout": "1h",
729
"interval": "5m",
730
"checker": "fping -q -- %%(host)s",
731
}
732
client_config = ConfigParser.SafeConfigParser(client_defaults)
733
client_config.read(os.path.join(server_settings["configdir"],
734
"clients.conf"))
735
736
global service
737
service = AvahiService(name = server_settings["servicename"],
738
type = "_mandos._tcp", );
739
if server_settings["interface"]:
740
service.interface = if_nametoindex(server_settings["interface"])
1821
console.setLevel(logging.WARNING)
1822
if debuglevel:
1823
level = getattr(logging, debuglevel.upper())
1824
syslogger.setLevel(level)
1825
console.setLevel(level)
1826
1827
if debug:
1828
# Enable all possible GnuTLS debugging
1829
1830
# "Use a log level over 10 to enable all debugging options."
1831
# - GnuTLS manual
1832
gnutls.library.functions.gnutls_global_set_log_level(11)
1833
1834
@gnutls.library.types.gnutls_log_func
1835
def debug_gnutls(level, string):
1836
logger.debug(u"GnuTLS: %s", string[:-1])
1837
1838
(gnutls.library.functions
1839
.gnutls_global_set_log_function(debug_gnutls))
1840
1841
# Redirect stdin so all checkers get /dev/null
1842
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1843
os.dup2(null, sys.stdin.fileno())
1844
if null > 2:
1845
os.close(null)
1846
else:
1847
# No console logging
1848
logger.removeHandler(console)
1849
1850
# Need to fork before connecting to D-Bus
1851
if not debug:
1852
# Close all input and output, do double fork, etc.
1853
daemon()
741
1854
742
1855
global main_loop
743
global bus
744
global server
745
1856
# From the Avahi example code
746
1857
DBusGMainLoop(set_as_default=True )
747
1858
main_loop = gobject.MainLoop()
748
1859
bus = dbus.SystemBus()
749
server = dbus.Interface(
750
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
751
avahi.DBUS_INTERFACE_SERVER )
752
1860
# End of Avahi example code
753
754
if debug:
755
console = logging.StreamHandler()
756
# console.setLevel(logging.DEBUG)
757
console.setFormatter(logging.Formatter\
758
('%(levelname)s: %(message)s'))
759
logger.addHandler(console)
760
del console
761
762
clients = Set()
763
def remove_from_clients(client):
764
clients.remove(client)
765
if not clients:
766
logger.critical(u"No clients left, exiting")
767
sys.exit()
768
769
clients.update(Set(Client(name = section,
770
stop_hook = remove_from_clients,
771
config
772
= dict(client_config.items(section)))
773
for section in client_config.sections()))
774
if not clients:
775
logger.critical(u"No clients defined")
776
sys.exit(1)
777
1861
if use_dbus:
1862
try:
1863
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1864
bus, do_not_queue=True)
1865
except dbus.exceptions.NameExistsException, e:
1866
logger.error(unicode(e) + u", disabling D-Bus")
1867
use_dbus = False
1868
server_settings[u"use_dbus"] = False
1869
tcp_server.use_dbus = False
1870
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1871
service = AvahiService(name = server_settings[u"servicename"],
1872
servicetype = u"_mandos._tcp",
1873
protocol = protocol, bus = bus)
1874
if server_settings["interface"]:
1875
service.interface = (if_nametoindex
1876
(str(server_settings[u"interface"])))
1877
1878
global multiprocessing_manager
1879
multiprocessing_manager = multiprocessing.Manager()
1880
1881
client_class = Client
1882
if use_dbus:
1883
client_class = functools.partial(ClientDBus, bus = bus)
1884
def client_config_items(config, section):
1885
special_settings = {
1886
"approved_by_default":
1887
lambda: config.getboolean(section,
1888
"approved_by_default"),
1889
}
1890
for name, value in config.items(section):
1891
try:
1892
yield (name, special_settings[name]())
1893
except KeyError:
1894
yield (name, value)
1895
1896
tcp_server.clients.update(set(
1897
client_class(name = section,
1898
config= dict(client_config_items(
1899
client_config, section)))
1900
for section in client_config.sections()))
1901
if not tcp_server.clients:
1902
logger.warning(u"No clients defined")
1903
778
1904
if not debug:
779
daemon()
1905
try:
1906
with pidfile:
1907
pid = os.getpid()
1908
pidfile.write(str(pid) + "\n")
1909
del pidfile
1910
except IOError:
1911
logger.error(u"Could not write to file %r with PID %d",
1912
pidfilename, pid)
1913
except NameError:
1914
# "pidfile" was never created
1915
pass
1916
del pidfilename
1917
1918
signal.signal(signal.SIGINT, signal.SIG_IGN)
1919
1920
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1921
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
780
1922
781
pidfilename = "/var/run/mandos/mandos.pid"
782
pid = os.getpid()
783
try:
784
pidfile = open(pidfilename, "w")
785
pidfile.write(str(pid) + "\n")
786
pidfile.close()
787
del pidfile
788
except IOError, err:
789
logger.error(u"Could not write %s file with PID %d",
790
pidfilename, os.getpid())
1923
if use_dbus:
1924
class MandosDBusService(dbus.service.Object):
1925
"""A D-Bus proxy object"""
1926
def __init__(self):
1927
dbus.service.Object.__init__(self, bus, u"/")
1928
_interface = u"se.bsnet.fukt.Mandos"
1929
1930
@dbus.service.signal(_interface, signature=u"o")
1931
def ClientAdded(self, objpath):
1932
"D-Bus signal"
1933
pass
1934
1935
@dbus.service.signal(_interface, signature=u"ss")
1936
def ClientNotFound(self, fingerprint, address):
1937
"D-Bus signal"
1938
pass
1939
1940
@dbus.service.signal(_interface, signature=u"os")
1941
def ClientRemoved(self, objpath, name):
1942
"D-Bus signal"
1943
pass
1944
1945
@dbus.service.method(_interface, out_signature=u"ao")
1946
def GetAllClients(self):
1947
"D-Bus method"
1948
return dbus.Array(c.dbus_object_path
1949
for c in tcp_server.clients)
1950
1951
@dbus.service.method(_interface,
1952
out_signature=u"a{oa{sv}}")
1953
def GetAllClientsWithProperties(self):
1954
"D-Bus method"
1955
return dbus.Dictionary(
1956
((c.dbus_object_path, c.GetAll(u""))
1957
for c in tcp_server.clients),
1958
signature=u"oa{sv}")
1959
1960
@dbus.service.method(_interface, in_signature=u"o")
1961
def RemoveClient(self, object_path):
1962
"D-Bus method"
1963
for c in tcp_server.clients:
1964
if c.dbus_object_path == object_path:
1965
tcp_server.clients.remove(c)
1966
c.remove_from_connection()
1967
# Don't signal anything except ClientRemoved
1968
c.disable(quiet=True)
1969
# Emit D-Bus signal
1970
self.ClientRemoved(object_path, c.name)
1971
return
1972
raise KeyError(object_path)
1973
1974
del _interface
1975
1976
mandos_dbus_service = MandosDBusService()
791
1977
792
1978
def cleanup():
793
1979
"Cleanup function; run on exit"
794
global group
795
# From the Avahi example code
796
if not group is None:
797
group.Free()
798
group = None
799
# End of Avahi example code
1980
service.cleanup()
800
1981
801
while clients:
802
client = clients.pop()
803
client.stop_hook = None
804
client.stop()
1982
while tcp_server.clients:
1983
client = tcp_server.clients.pop()
1984
if use_dbus:
1985
client.remove_from_connection()
1986
client.disable_hook = None
1987
# Don't signal anything except ClientRemoved
1988
client.disable(quiet=True)
1989
if use_dbus:
1990
# Emit D-Bus signal
1991
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1992
client.name)
805
1993
806
1994
atexit.register(cleanup)
807
1995
808
if not debug:
809
signal.signal(signal.SIGINT, signal.SIG_IGN)
810
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
811
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
812
813
for client in clients:
814
client.start()
815
816
tcp_server = IPv6_TCPServer((server_settings["address"],
817
server_settings["port"]),
818
tcp_handler,
819
settings=server_settings,
820
clients=clients)
1996
for client in tcp_server.clients:
1997
if use_dbus:
1998
# Emit D-Bus signal
1999
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2000
client.enable()
2001
2002
tcp_server.enable()
2003
tcp_server.server_activate()
2004
821
2005
# Find out what port we got
822
2006
service.port = tcp_server.socket.getsockname()[1]
823
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
824
u" scope_id %d" % tcp_server.socket.getsockname())
2007
if use_ipv6:
2008
logger.info(u"Now listening on address %r, port %d,"
2009
" flowinfo %d, scope_id %d"
2010
% tcp_server.socket.getsockname())
2011
else: # IPv4
2012
logger.info(u"Now listening on address %r, port %d"
2013
% tcp_server.socket.getsockname())
825
2014
826
2015
#service.interface = tcp_server.socket.getsockname()[3]
827
2016
828
2017
try:
829
2018
# From the Avahi example code
830
server.connect_to_signal("StateChanged", server_state_changed)
831
2019
try:
832
server_state_changed(server.GetState())
2020
service.activate()
833
2021
except dbus.exceptions.DBusException, error:
834
2022
logger.critical(u"DBusException: %s", error)
2023
cleanup()
835
2024
sys.exit(1)
836
2025
# End of Avahi example code
837
2026
838
2027
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
839
2028
lambda *args, **kwargs:
840
tcp_server.handle_request\
841
(*args[2:], **kwargs) or True)
2029
(tcp_server.handle_request
2030
(*args[2:], **kwargs) or True))
842
2031
843
2032
logger.debug(u"Starting main loop")
844
main_loop_started = True
845
2033
main_loop.run()
846
2034
except AvahiError, error:
847
logger.critical(u"AvahiError: %s" + unicode(error))
2035
logger.critical(u"AvahiError: %s", error)
2036
cleanup()
848
2037
sys.exit(1)
849
2038
except KeyboardInterrupt:
850
2039
if debug:
851
print
2040
print >> sys.stderr
2041
logger.debug(u"Server received KeyboardInterrupt")
2042
logger.debug(u"Server exiting")
2043
# Must run before the D-Bus bus name gets deregistered
2044
cleanup()
852
2045
853
2046
if __name__ == '__main__':
854
2047
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0