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- Committer: Teddy Hogeborn
- Date: 2008-09-06 15:41:27 UTC
- Revision ID: teddy@fukt.bsnet.se-20080906154127-oxfrwsrbu0inhljv
* plugin-runner.c (main): Bug fix: use built-in default value if
"--plugin-dir" was not used.
"--plugin-dir" was not used.
- files added:
- plugins.d/usplash
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- .bzrignore
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
12
#
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13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
#
17
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# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
31
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# Contact the authors at <mandos@fukt.bsnet.se>.
32
31
#
33
32
34
from __future__ import division, with_statement, absolute_import
33
from __future__ import division
35
34
36
import SocketServer as socketserver
35
import SocketServer
37
36
import socket
38
import optparse
37
import select
38
from optparse import OptionParser
39
39
import datetime
40
40
import errno
41
41
import gnutls.crypto
44
44
import gnutls.library.functions
45
45
import gnutls.library.constants
46
46
import gnutls.library.types
47
import ConfigParser as configparser
47
import ConfigParser
48
48
import sys
49
49
import re
50
50
import os
51
51
import signal
52
from sets import Set
52
53
import subprocess
53
54
import atexit
54
55
import stat
55
56
import logging
56
57
import logging.handlers
57
58
import pwd
58
import contextlib
59
import struct
60
import fcntl
61
import functools
62
import cPickle as pickle
63
import multiprocessing
64
59
65
60
import dbus
66
import dbus.service
67
61
import gobject
68
62
import avahi
69
63
from dbus.mainloop.glib import DBusGMainLoop
70
64
import ctypes
71
import ctypes.util
72
import xml.dom.minidom
73
import inspect
74
75
try:
76
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
77
except AttributeError:
78
try:
79
from IN import SO_BINDTODEVICE
80
except ImportError:
81
SO_BINDTODEVICE = None
82
83
84
version = "1.0.14"
85
86
#logger = logging.getLogger(u'mandos')
87
logger = logging.Logger(u'mandos')
88
syslogger = (logging.handlers.SysLogHandler
89
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
90
address = "/dev/log"))
91
syslogger.setFormatter(logging.Formatter
92
(u'Mandos [%(process)d]: %(levelname)s:'
93
u' %(message)s'))
65
66
version = "1.0"
67
68
logger = logging.Logger('mandos')
69
syslogger = logging.handlers.SysLogHandler\
70
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
71
address = "/dev/log")
72
syslogger.setFormatter(logging.Formatter\
73
('Mandos: %(levelname)s: %(message)s'))
94
74
logger.addHandler(syslogger)
95
75
96
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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'))
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
78
' %(message)s'))
100
79
logger.addHandler(console)
101
80
102
81
class AvahiError(Exception):
103
def __init__(self, value, *args, **kwargs):
82
def __init__(self, value):
104
83
self.value = value
105
super(AvahiError, self).__init__(value, *args, **kwargs)
106
def __unicode__(self):
107
return unicode(repr(self.value))
84
def __str__(self):
85
return repr(self.value)
108
86
109
87
class AvahiServiceError(AvahiError):
110
88
pass
115
93
116
94
class AvahiService(object):
117
95
"""An Avahi (Zeroconf) service.
118
119
96
Attributes:
120
97
interface: integer; avahi.IF_UNSPEC or an interface index.
121
98
Used to optionally bind to the specified interface.
122
name: string; Example: u'Mandos'
123
type: string; Example: u'_mandos._tcp'.
99
name: string; Example: 'Mandos'
100
type: string; Example: '_mandos._tcp'.
124
101
See <http://www.dns-sd.org/ServiceTypes.html>
125
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port: integer; what port to announce
126
103
TXT: list of strings; TXT record for the service
129
106
max_renames: integer; maximum number of renames
130
107
rename_count: integer; counter so we only rename after collisions
131
108
a sensible number of times
132
group: D-Bus Entry Group
133
server: D-Bus Server
134
bus: dbus.SystemBus()
135
109
"""
136
110
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
137
servicetype = None, port = None, TXT = None,
138
domain = u"", host = u"", max_renames = 32768,
139
protocol = avahi.PROTO_UNSPEC, bus = None):
111
type = None, port = None, TXT = None, domain = "",
112
host = "", max_renames = 32768):
140
113
self.interface = interface
141
114
self.name = name
142
self.type = servicetype
115
self.type = type
143
116
self.port = port
144
self.TXT = TXT if TXT is not None else []
117
if TXT is None:
118
self.TXT = []
119
else:
120
self.TXT = TXT
145
121
self.domain = domain
146
122
self.host = host
147
123
self.rename_count = 0
148
124
self.max_renames = max_renames
149
self.protocol = protocol
150
self.group = None # our entry group
151
self.server = None
152
self.bus = bus
153
125
def rename(self):
154
126
"""Derived from the Avahi example code"""
155
127
if self.rename_count >= self.max_renames:
156
128
logger.critical(u"No suitable Zeroconf service name found"
157
129
u" after %i retries, exiting.",
158
self.rename_count)
159
raise AvahiServiceError(u"Too many renames")
160
self.name = self.server.GetAlternativeServiceName(self.name)
130
rename_count)
131
raise AvahiServiceError("Too many renames")
132
self.name = server.GetAlternativeServiceName(self.name)
161
133
logger.info(u"Changing Zeroconf service name to %r ...",
162
unicode(self.name))
163
syslogger.setFormatter(logging.Formatter
164
(u'Mandos (%s) [%%(process)d]:'
165
u' %%(levelname)s: %%(message)s'
166
% self.name))
134
str(self.name))
135
syslogger.setFormatter(logging.Formatter\
136
('Mandos (%s): %%(levelname)s:'
137
' %%(message)s' % self.name))
167
138
self.remove()
168
139
self.add()
169
140
self.rename_count += 1
170
141
def remove(self):
171
142
"""Derived from the Avahi example code"""
172
if self.group is not None:
173
self.group.Reset()
143
if group is not None:
144
group.Reset()
174
145
def add(self):
175
146
"""Derived from the Avahi example code"""
176
if self.group is None:
177
self.group = dbus.Interface(
178
self.bus.get_object(avahi.DBUS_NAME,
179
self.server.EntryGroupNew()),
180
avahi.DBUS_INTERFACE_ENTRY_GROUP)
181
self.group.connect_to_signal('StateChanged',
182
self
183
.entry_group_state_changed)
147
global group
148
if group is None:
149
group = dbus.Interface\
150
(bus.get_object(avahi.DBUS_NAME,
151
server.EntryGroupNew()),
152
avahi.DBUS_INTERFACE_ENTRY_GROUP)
153
group.connect_to_signal('StateChanged',
154
entry_group_state_changed)
184
155
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
185
self.name, self.type)
186
self.group.AddService(
187
self.interface,
188
self.protocol,
189
dbus.UInt32(0), # flags
190
self.name, self.type,
191
self.domain, self.host,
192
dbus.UInt16(self.port),
193
avahi.string_array_to_txt_array(self.TXT))
194
self.group.Commit()
195
def entry_group_state_changed(self, state, error):
196
"""Derived from the Avahi example code"""
197
logger.debug(u"Avahi state change: %i", state)
198
199
if state == avahi.ENTRY_GROUP_ESTABLISHED:
200
logger.debug(u"Zeroconf service established.")
201
elif state == avahi.ENTRY_GROUP_COLLISION:
202
logger.warning(u"Zeroconf service name collision.")
203
self.rename()
204
elif state == avahi.ENTRY_GROUP_FAILURE:
205
logger.critical(u"Avahi: Error in group state changed %s",
206
unicode(error))
207
raise AvahiGroupError(u"State changed: %s"
208
% unicode(error))
209
def cleanup(self):
210
"""Derived from the Avahi example code"""
211
if self.group is not None:
212
self.group.Free()
213
self.group = None
214
def server_state_changed(self, state):
215
"""Derived from the Avahi example code"""
216
if state == avahi.SERVER_COLLISION:
217
logger.error(u"Zeroconf server name collision")
218
self.remove()
219
elif state == avahi.SERVER_RUNNING:
220
self.add()
221
def activate(self):
222
"""Derived from the Avahi example code"""
223
if self.server is None:
224
self.server = dbus.Interface(
225
self.bus.get_object(avahi.DBUS_NAME,
226
avahi.DBUS_PATH_SERVER),
227
avahi.DBUS_INTERFACE_SERVER)
228
self.server.connect_to_signal(u"StateChanged",
229
self.server_state_changed)
230
self.server_state_changed(self.server.GetState())
156
service.name, service.type)
157
group.AddService(
158
self.interface, # interface
159
avahi.PROTO_INET6, # protocol
160
dbus.UInt32(0), # flags
161
self.name, self.type,
162
self.domain, self.host,
163
dbus.UInt16(self.port),
164
avahi.string_array_to_txt_array(self.TXT))
165
group.Commit()
166
167
# From the Avahi example code:
168
group = None # our entry group
169
# End of Avahi example code
231
170
232
171
233
172
class Client(object):
234
173
"""A representation of a client host served by this server.
235
236
174
Attributes:
237
name: string; from the config file, used in log messages and
238
D-Bus identifiers
175
name: string; from the config file, used in log messages
239
176
fingerprint: string (40 or 32 hexadecimal digits); used to
240
177
uniquely identify the client
241
secret: bytestring; sent verbatim (over TLS) to client
242
host: string; available for use by the checker command
243
created: datetime.datetime(); (UTC) object creation
244
last_enabled: datetime.datetime(); (UTC)
245
enabled: bool()
246
last_checked_ok: datetime.datetime(); (UTC) or None
247
timeout: datetime.timedelta(); How long from last_checked_ok
248
until this client is disabled
249
interval: datetime.timedelta(); How often to start a new checker
250
disable_hook: If set, called by disable() as disable_hook(self)
251
checker: subprocess.Popen(); a running checker process used
252
to see if the client lives.
253
'None' if no process is running.
178
secret: bytestring; sent verbatim (over TLS) to client
179
host: string; available for use by the checker command
180
created: datetime.datetime(); object creation, not client host
181
last_checked_ok: datetime.datetime() or None if not yet checked OK
182
timeout: datetime.timedelta(); How long from last_checked_ok
183
until this client is invalid
184
interval: datetime.timedelta(); How often to start a new checker
185
stop_hook: If set, called by stop() as stop_hook(self)
186
checker: subprocess.Popen(); a running checker process used
187
to see if the client lives.
188
'None' if no process is running.
254
189
checker_initiator_tag: a gobject event source tag, or None
255
disable_initiator_tag: - '' -
190
stop_initiator_tag: - '' -
256
191
checker_callback_tag: - '' -
257
192
checker_command: string; External command which is run to check if
258
193
client lives. %() expansions are done at
259
194
runtime with vars(self) as dict, so that for
260
195
instance %(name)s can be used in the command.
261
current_checker_command: string; current running checker_command
262
approved_delay: datetime.timedelta(); Time to wait for approval
263
_approved: bool(); 'None' if not yet approved/disapproved
264
approved_duration: datetime.timedelta(); Duration of one approval
196
Private attibutes:
197
_timeout: Real variable for 'timeout'
198
_interval: Real variable for 'interval'
199
_timeout_milliseconds: Used when calling gobject.timeout_add()
200
_interval_milliseconds: - '' -
265
201
"""
266
267
@staticmethod
268
def _timedelta_to_milliseconds(td):
269
"Convert a datetime.timedelta() to milliseconds"
270
return ((td.days * 24 * 60 * 60 * 1000)
271
+ (td.seconds * 1000)
272
+ (td.microseconds // 1000))
273
274
def timeout_milliseconds(self):
275
"Return the 'timeout' attribute in milliseconds"
276
return self._timedelta_to_milliseconds(self.timeout)
277
278
def interval_milliseconds(self):
279
"Return the 'interval' attribute in milliseconds"
280
return self._timedelta_to_milliseconds(self.interval)
281
282
def approved_delay_milliseconds(self):
283
return self._timedelta_to_milliseconds(self.approved_delay)
284
285
def __init__(self, name = None, disable_hook=None, config=None):
202
def _set_timeout(self, timeout):
203
"Setter function for 'timeout' attribute"
204
self._timeout = timeout
205
self._timeout_milliseconds = ((self.timeout.days
206
* 24 * 60 * 60 * 1000)
207
+ (self.timeout.seconds * 1000)
208
+ (self.timeout.microseconds
209
// 1000))
210
timeout = property(lambda self: self._timeout,
211
_set_timeout)
212
del _set_timeout
213
def _set_interval(self, interval):
214
"Setter function for 'interval' attribute"
215
self._interval = interval
216
self._interval_milliseconds = ((self.interval.days
217
* 24 * 60 * 60 * 1000)
218
+ (self.interval.seconds
219
* 1000)
220
+ (self.interval.microseconds
221
// 1000))
222
interval = property(lambda self: self._interval,
223
_set_interval)
224
del _set_interval
225
def __init__(self, name = None, stop_hook=None, config={}):
286
226
"""Note: the 'checker' key in 'config' sets the
287
227
'checker_command' attribute and *not* the 'checker'
288
228
attribute."""
289
229
self.name = name
290
if config is None:
291
config = {}
292
230
logger.debug(u"Creating client %r", self.name)
293
231
# Uppercase and remove spaces from fingerprint for later
294
232
# comparison purposes with return value from the fingerprint()
295
233
# function
296
self.fingerprint = (config[u"fingerprint"].upper()
297
.replace(u" ", u""))
234
self.fingerprint = config["fingerprint"].upper()\
235
.replace(u" ", u"")
298
236
logger.debug(u" Fingerprint: %s", self.fingerprint)
299
if u"secret" in config:
300
self.secret = config[u"secret"].decode(u"base64")
301
elif u"secfile" in config:
302
with open(os.path.expanduser(os.path.expandvars
303
(config[u"secfile"])),
304
"rb") as secfile:
305
self.secret = secfile.read()
237
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
239
elif "secfile" in config:
240
sf = open(config["secfile"])
241
self.secret = sf.read()
242
sf.close()
306
243
else:
307
#XXX Need to allow secret on demand!
308
244
raise TypeError(u"No secret or secfile for client %s"
309
245
% self.name)
310
self.host = config.get(u"host", u"")
311
self.created = datetime.datetime.utcnow()
312
self.enabled = False
313
self.last_enabled = None
246
self.host = config.get("host", "")
247
self.created = datetime.datetime.now()
314
248
self.last_checked_ok = None
315
self.timeout = string_to_delta(config[u"timeout"])
316
self.interval = string_to_delta(config[u"interval"])
317
self.disable_hook = disable_hook
249
self.timeout = string_to_delta(config["timeout"])
250
self.interval = string_to_delta(config["interval"])
251
self.stop_hook = stop_hook
318
252
self.checker = None
319
253
self.checker_initiator_tag = None
320
self.disable_initiator_tag = None
254
self.stop_initiator_tag = None
321
255
self.checker_callback_tag = None
322
self.checker_command = config[u"checker"]
323
self.current_checker_command = None
324
self.last_connect = None
325
self._approved = None
326
self.approved_by_default = config.get(u"approved_by_default",
327
True)
328
self.approvals_pending = 0
329
self.approved_delay = string_to_delta(
330
config[u"approved_delay"])
331
self.approved_duration = string_to_delta(
332
config[u"approved_duration"])
333
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
334
335
def send_changedstate(self):
336
self.changedstate.acquire()
337
self.changedstate.notify_all()
338
self.changedstate.release()
339
340
def enable(self):
256
self.check_command = config["checker"]
257
def start(self):
341
258
"""Start this client's checker and timeout hooks"""
342
if getattr(self, u"enabled", False):
343
# Already enabled
344
return
345
self.send_changedstate()
346
self.last_enabled = datetime.datetime.utcnow()
347
259
# Schedule a new checker to be started an 'interval' from now,
348
260
# and every interval from then on.
349
self.checker_initiator_tag = (gobject.timeout_add
350
(self.interval_milliseconds(),
351
self.start_checker))
352
# Schedule a disable() when 'timeout' has passed
353
self.disable_initiator_tag = (gobject.timeout_add
354
(self.timeout_milliseconds(),
355
self.disable))
356
self.enabled = True
261
self.checker_initiator_tag = gobject.timeout_add\
262
(self._interval_milliseconds,
263
self.start_checker)
357
264
# Also start a new checker *right now*.
358
265
self.start_checker()
359
360
def disable(self, quiet=True):
361
"""Disable this client."""
362
if not getattr(self, "enabled", False):
266
# Schedule a stop() when 'timeout' has passed
267
self.stop_initiator_tag = gobject.timeout_add\
268
(self._timeout_milliseconds,
269
self.stop)
270
def stop(self):
271
"""Stop this client.
272
The possibility that a client might be restarted is left open,
273
but not currently used."""
274
# If this client doesn't have a secret, it is already stopped.
275
if hasattr(self, "secret") and self.secret:
276
logger.info(u"Stopping client %s", self.name)
277
self.secret = None
278
else:
363
279
return False
364
if not quiet:
365
self.send_changedstate()
366
if not quiet:
367
logger.info(u"Disabling client %s", self.name)
368
if getattr(self, u"disable_initiator_tag", False):
369
gobject.source_remove(self.disable_initiator_tag)
370
self.disable_initiator_tag = None
371
if getattr(self, u"checker_initiator_tag", False):
280
if getattr(self, "stop_initiator_tag", False):
281
gobject.source_remove(self.stop_initiator_tag)
282
self.stop_initiator_tag = None
283
if getattr(self, "checker_initiator_tag", False):
372
284
gobject.source_remove(self.checker_initiator_tag)
373
285
self.checker_initiator_tag = None
374
286
self.stop_checker()
375
if self.disable_hook:
376
self.disable_hook(self)
377
self.enabled = False
287
if self.stop_hook:
288
self.stop_hook(self)
378
289
# Do not run this again if called by a gobject.timeout_add
379
290
return False
380
381
291
def __del__(self):
382
self.disable_hook = None
383
self.disable()
384
385
def checker_callback(self, pid, condition, command):
292
self.stop_hook = None
293
self.stop()
294
def checker_callback(self, pid, condition):
386
295
"""The checker has completed, so take appropriate actions."""
296
now = datetime.datetime.now()
387
297
self.checker_callback_tag = None
388
298
self.checker = None
389
if os.WIFEXITED(condition):
390
exitstatus = os.WEXITSTATUS(condition)
391
if exitstatus == 0:
392
logger.info(u"Checker for %(name)s succeeded",
393
vars(self))
394
self.checked_ok()
395
else:
396
logger.info(u"Checker for %(name)s failed",
397
vars(self))
398
else:
299
if os.WIFEXITED(condition) \
300
and (os.WEXITSTATUS(condition) == 0):
301
logger.info(u"Checker for %(name)s succeeded",
302
vars(self))
303
self.last_checked_ok = now
304
gobject.source_remove(self.stop_initiator_tag)
305
self.stop_initiator_tag = gobject.timeout_add\
306
(self._timeout_milliseconds,
307
self.stop)
308
elif not os.WIFEXITED(condition):
399
309
logger.warning(u"Checker for %(name)s crashed?",
400
310
vars(self))
401
402
def checked_ok(self):
403
"""Bump up the timeout for this client.
404
405
This should only be called when the client has been seen,
406
alive and well.
407
"""
408
self.last_checked_ok = datetime.datetime.utcnow()
409
gobject.source_remove(self.disable_initiator_tag)
410
self.disable_initiator_tag = (gobject.timeout_add
411
(self.timeout_milliseconds(),
412
self.disable))
413
311
else:
312
logger.info(u"Checker for %(name)s failed",
313
vars(self))
414
314
def start_checker(self):
415
315
"""Start a new checker subprocess if one is not running.
416
417
316
If a checker already exists, leave it running and do
418
317
nothing."""
419
318
# The reason for not killing a running checker is that if we
422
321
# client would inevitably timeout, since no checker would get
423
322
# a chance to run to completion. If we instead leave running
424
323
# checkers alone, the checker would have to take more time
425
# than 'timeout' for the client to be disabled, which is as it
426
# should be.
427
428
# If a checker exists, make sure it is not a zombie
429
try:
430
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
431
except (AttributeError, OSError), error:
432
if (isinstance(error, OSError)
433
and error.errno != errno.ECHILD):
434
raise error
435
else:
436
if pid:
437
logger.warning(u"Checker was a zombie")
438
gobject.source_remove(self.checker_callback_tag)
439
self.checker_callback(pid, status,
440
self.current_checker_command)
441
# Start a new checker if needed
324
# than 'timeout' for the client to be declared invalid, which
325
# is as it should be.
442
326
if self.checker is None:
443
327
try:
444
# In case checker_command has exactly one % operator
445
command = self.checker_command % self.host
328
# In case check_command has exactly one % operator
329
command = self.check_command % self.host
446
330
except TypeError:
447
331
# Escape attributes for the shell
448
escaped_attrs = dict((key,
449
re.escape(unicode(str(val),
450
errors=
451
u'replace')))
332
escaped_attrs = dict((key, re.escape(str(val)))
452
333
for key, val in
453
334
vars(self).iteritems())
454
335
try:
455
command = self.checker_command % escaped_attrs
336
command = self.check_command % escaped_attrs
456
337
except TypeError, error:
457
338
logger.error(u'Could not format string "%s":'
458
u' %s', self.checker_command, error)
339
u' %s', self.check_command, error)
459
340
return True # Try again later
460
self.current_checker_command = command
461
341
try:
462
342
logger.info(u"Starting checker %r for %s",
463
343
command, self.name)
467
347
# always replaced by /dev/null.)
468
348
self.checker = subprocess.Popen(command,
469
349
close_fds=True,
470
shell=True, cwd=u"/")
471
self.checker_callback_tag = (gobject.child_watch_add
472
(self.checker.pid,
473
self.checker_callback,
474
data=command))
475
# The checker may have completed before the gobject
476
# watch was added. Check for this.
477
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
478
if pid:
479
gobject.source_remove(self.checker_callback_tag)
480
self.checker_callback(pid, status, command)
350
shell=True, cwd="/")
351
self.checker_callback_tag = gobject.child_watch_add\
352
(self.checker.pid,
353
self.checker_callback)
481
354
except OSError, error:
482
355
logger.error(u"Failed to start subprocess: %s",
483
356
error)
484
357
# Re-run this periodically if run by gobject.timeout_add
485
358
return True
486
487
359
def stop_checker(self):
488
360
"""Force the checker process, if any, to stop."""
489
361
if self.checker_callback_tag:
490
362
gobject.source_remove(self.checker_callback_tag)
491
363
self.checker_callback_tag = None
492
if getattr(self, u"checker", None) is None:
364
if getattr(self, "checker", None) is None:
493
365
return
494
366
logger.debug(u"Stopping checker for %(name)s", vars(self))
495
367
try:
496
368
os.kill(self.checker.pid, signal.SIGTERM)
497
#time.sleep(0.5)
369
#os.sleep(0.5)
498
370
#if self.checker.poll() is None:
499
371
# os.kill(self.checker.pid, signal.SIGKILL)
500
372
except OSError, error:
501
373
if error.errno != errno.ESRCH: # No such process
502
374
raise
503
375
self.checker = None
504
505
def dbus_service_property(dbus_interface, signature=u"v",
506
access=u"readwrite", byte_arrays=False):
507
"""Decorators for marking methods of a DBusObjectWithProperties to
508
become properties on the D-Bus.
509
510
The decorated method will be called with no arguments by "Get"
511
and with one argument by "Set".
512
513
The parameters, where they are supported, are the same as
514
dbus.service.method, except there is only "signature", since the
515
type from Get() and the type sent to Set() is the same.
516
"""
517
# Encoding deeply encoded byte arrays is not supported yet by the
518
# "Set" method, so we fail early here:
519
if byte_arrays and signature != u"ay":
520
raise ValueError(u"Byte arrays not supported for non-'ay'"
521
u" signature %r" % signature)
522
def decorator(func):
523
func._dbus_is_property = True
524
func._dbus_interface = dbus_interface
525
func._dbus_signature = signature
526
func._dbus_access = access
527
func._dbus_name = func.__name__
528
if func._dbus_name.endswith(u"_dbus_property"):
529
func._dbus_name = func._dbus_name[:-14]
530
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
531
return func
532
return decorator
533
534
535
class DBusPropertyException(dbus.exceptions.DBusException):
536
"""A base class for D-Bus property-related exceptions
537
"""
538
def __unicode__(self):
539
return unicode(str(self))
540
541
542
class DBusPropertyAccessException(DBusPropertyException):
543
"""A property's access permissions disallows an operation.
544
"""
545
pass
546
547
548
class DBusPropertyNotFound(DBusPropertyException):
549
"""An attempt was made to access a non-existing property.
550
"""
551
pass
552
553
554
class DBusObjectWithProperties(dbus.service.Object):
555
"""A D-Bus object with properties.
556
557
Classes inheriting from this can use the dbus_service_property
558
decorator to expose methods as D-Bus properties. It exposes the
559
standard Get(), Set(), and GetAll() methods on the D-Bus.
560
"""
561
562
@staticmethod
563
def _is_dbus_property(obj):
564
return getattr(obj, u"_dbus_is_property", False)
565
566
def _get_all_dbus_properties(self):
567
"""Returns a generator of (name, attribute) pairs
568
"""
569
return ((prop._dbus_name, prop)
570
for name, prop in
571
inspect.getmembers(self, self._is_dbus_property))
572
573
def _get_dbus_property(self, interface_name, property_name):
574
"""Returns a bound method if one exists which is a D-Bus
575
property with the specified name and interface.
576
"""
577
for name in (property_name,
578
property_name + u"_dbus_property"):
579
prop = getattr(self, name, None)
580
if (prop is None
581
or not self._is_dbus_property(prop)
582
or prop._dbus_name != property_name
583
or (interface_name and prop._dbus_interface
584
and interface_name != prop._dbus_interface)):
585
continue
586
return prop
587
# No such property
588
raise DBusPropertyNotFound(self.dbus_object_path + u":"
589
+ interface_name + u"."
590
+ property_name)
591
592
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
593
out_signature=u"v")
594
def Get(self, interface_name, property_name):
595
"""Standard D-Bus property Get() method, see D-Bus standard.
596
"""
597
prop = self._get_dbus_property(interface_name, property_name)
598
if prop._dbus_access == u"write":
599
raise DBusPropertyAccessException(property_name)
600
value = prop()
601
if not hasattr(value, u"variant_level"):
602
return value
603
return type(value)(value, variant_level=value.variant_level+1)
604
605
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
606
def Set(self, interface_name, property_name, value):
607
"""Standard D-Bus property Set() method, see D-Bus standard.
608
"""
609
prop = self._get_dbus_property(interface_name, property_name)
610
if prop._dbus_access == u"read":
611
raise DBusPropertyAccessException(property_name)
612
if prop._dbus_get_args_options[u"byte_arrays"]:
613
# The byte_arrays option is not supported yet on
614
# signatures other than "ay".
615
if prop._dbus_signature != u"ay":
616
raise ValueError
617
value = dbus.ByteArray(''.join(unichr(byte)
618
for byte in value))
619
prop(value)
620
621
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
622
out_signature=u"a{sv}")
623
def GetAll(self, interface_name):
624
"""Standard D-Bus property GetAll() method, see D-Bus
625
standard.
626
627
Note: Will not include properties with access="write".
628
"""
629
all = {}
630
for name, prop in self._get_all_dbus_properties():
631
if (interface_name
632
and interface_name != prop._dbus_interface):
633
# Interface non-empty but did not match
634
continue
635
# Ignore write-only properties
636
if prop._dbus_access == u"write":
637
continue
638
value = prop()
639
if not hasattr(value, u"variant_level"):
640
all[name] = value
641
continue
642
all[name] = type(value)(value, variant_level=
643
value.variant_level+1)
644
return dbus.Dictionary(all, signature=u"sv")
645
646
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
647
out_signature=u"s",
648
path_keyword='object_path',
649
connection_keyword='connection')
650
def Introspect(self, object_path, connection):
651
"""Standard D-Bus method, overloaded to insert property tags.
652
"""
653
xmlstring = dbus.service.Object.Introspect(self, object_path,
654
connection)
655
try:
656
document = xml.dom.minidom.parseString(xmlstring)
657
def make_tag(document, name, prop):
658
e = document.createElement(u"property")
659
e.setAttribute(u"name", name)
660
e.setAttribute(u"type", prop._dbus_signature)
661
e.setAttribute(u"access", prop._dbus_access)
662
return e
663
for if_tag in document.getElementsByTagName(u"interface"):
664
for tag in (make_tag(document, name, prop)
665
for name, prop
666
in self._get_all_dbus_properties()
667
if prop._dbus_interface
668
== if_tag.getAttribute(u"name")):
669
if_tag.appendChild(tag)
670
# Add the names to the return values for the
671
# "org.freedesktop.DBus.Properties" methods
672
if (if_tag.getAttribute(u"name")
673
== u"org.freedesktop.DBus.Properties"):
674
for cn in if_tag.getElementsByTagName(u"method"):
675
if cn.getAttribute(u"name") == u"Get":
676
for arg in cn.getElementsByTagName(u"arg"):
677
if (arg.getAttribute(u"direction")
678
== u"out"):
679
arg.setAttribute(u"name", u"value")
680
elif cn.getAttribute(u"name") == u"GetAll":
681
for arg in cn.getElementsByTagName(u"arg"):
682
if (arg.getAttribute(u"direction")
683
== u"out"):
684
arg.setAttribute(u"name", u"props")
685
xmlstring = document.toxml(u"utf-8")
686
document.unlink()
687
except (AttributeError, xml.dom.DOMException,
688
xml.parsers.expat.ExpatError), error:
689
logger.error(u"Failed to override Introspection method",
690
error)
691
return xmlstring
692
693
694
class ClientDBus(Client, DBusObjectWithProperties):
695
"""A Client class using D-Bus
696
697
Attributes:
698
dbus_object_path: dbus.ObjectPath
699
bus: dbus.SystemBus()
700
"""
701
# dbus.service.Object doesn't use super(), so we can't either.
702
703
def __init__(self, bus = None, *args, **kwargs):
704
self._approvals_pending = 0
705
self.bus = bus
706
Client.__init__(self, *args, **kwargs)
707
# Only now, when this client is initialized, can it show up on
708
# the D-Bus
709
self.dbus_object_path = (dbus.ObjectPath
710
(u"/clients/"
711
+ self.name.replace(u".", u"_")))
712
DBusObjectWithProperties.__init__(self, self.bus,
713
self.dbus_object_path)
714
715
#Could possible return a bool(self._approvals_pending),
716
#but this could mess up approvals_pending += 1 XXX
717
def _get_approvals_pending(self):
718
return self._approvals_pending
719
def _set_approvals_pending(self, value):
720
old_value = self._approvals_pending
721
self._approvals_pending = value
722
bval = bool(value)
723
if (hasattr(self, "dbus_object_path")
724
and bval is not bool(old_value)):
725
dbus_bool = dbus.Boolean(bval, variant_level=1)
726
self.PropertyChanged(dbus.String(u"approved_pending"),
727
dbus_bool)
728
729
approvals_pending = property(_get_approvals_pending,
730
_set_approvals_pending)
731
del _get_approvals_pending, _set_approvals_pending
732
733
@staticmethod
734
def _datetime_to_dbus(dt, variant_level=0):
735
"""Convert a UTC datetime.datetime() to a D-Bus type."""
736
return dbus.String(dt.isoformat(),
737
variant_level=variant_level)
738
739
def enable(self):
740
oldstate = getattr(self, u"enabled", False)
741
r = Client.enable(self)
742
if oldstate != self.enabled:
743
# Emit D-Bus signals
744
self.PropertyChanged(dbus.String(u"enabled"),
745
dbus.Boolean(True, variant_level=1))
746
self.PropertyChanged(
747
dbus.String(u"last_enabled"),
748
self._datetime_to_dbus(self.last_enabled,
749
variant_level=1))
750
return r
751
752
def disable(self, quiet = False):
753
oldstate = getattr(self, u"enabled", False)
754
r = Client.disable(self, quiet=quiet)
755
if not quiet and oldstate != self.enabled:
756
# Emit D-Bus signal
757
self.PropertyChanged(dbus.String(u"enabled"),
758
dbus.Boolean(False, variant_level=1))
759
return r
760
761
def __del__(self, *args, **kwargs):
762
try:
763
self.remove_from_connection()
764
except LookupError:
765
pass
766
if hasattr(DBusObjectWithProperties, u"__del__"):
767
DBusObjectWithProperties.__del__(self, *args, **kwargs)
768
Client.__del__(self, *args, **kwargs)
769
770
def checker_callback(self, pid, condition, command,
771
*args, **kwargs):
772
self.checker_callback_tag = None
773
self.checker = None
774
# Emit D-Bus signal
775
self.PropertyChanged(dbus.String(u"checker_running"),
776
dbus.Boolean(False, variant_level=1))
777
if os.WIFEXITED(condition):
778
exitstatus = os.WEXITSTATUS(condition)
779
# Emit D-Bus signal
780
self.CheckerCompleted(dbus.Int16(exitstatus),
781
dbus.Int64(condition),
782
dbus.String(command))
783
else:
784
# Emit D-Bus signal
785
self.CheckerCompleted(dbus.Int16(-1),
786
dbus.Int64(condition),
787
dbus.String(command))
788
789
return Client.checker_callback(self, pid, condition, command,
790
*args, **kwargs)
791
792
def checked_ok(self, *args, **kwargs):
793
r = Client.checked_ok(self, *args, **kwargs)
794
# Emit D-Bus signal
795
self.PropertyChanged(
796
dbus.String(u"last_checked_ok"),
797
(self._datetime_to_dbus(self.last_checked_ok,
798
variant_level=1)))
799
return r
800
801
def start_checker(self, *args, **kwargs):
802
old_checker = self.checker
803
if self.checker is not None:
804
old_checker_pid = self.checker.pid
805
else:
806
old_checker_pid = None
807
r = Client.start_checker(self, *args, **kwargs)
808
# Only if new checker process was started
809
if (self.checker is not None
810
and old_checker_pid != self.checker.pid):
811
# Emit D-Bus signal
812
self.CheckerStarted(self.current_checker_command)
813
self.PropertyChanged(
814
dbus.String(u"checker_running"),
815
dbus.Boolean(True, variant_level=1))
816
return r
817
818
def stop_checker(self, *args, **kwargs):
819
old_checker = getattr(self, u"checker", None)
820
r = Client.stop_checker(self, *args, **kwargs)
821
if (old_checker is not None
822
and getattr(self, u"checker", None) is None):
823
self.PropertyChanged(dbus.String(u"checker_running"),
824
dbus.Boolean(False, variant_level=1))
825
return r
826
827
def _reset_approved(self):
828
self._approved = None
829
return False
830
831
def approve(self, value=True):
832
self.send_changedstate()
833
self._approved = value
834
gobject.timeout_add(self._timedelta_to_milliseconds(self.approved_duration),
835
self._reset_approved)
836
837
838
## D-Bus methods, signals & properties
839
_interface = u"se.bsnet.fukt.Mandos.Client"
840
841
## Signals
842
843
# CheckerCompleted - signal
844
@dbus.service.signal(_interface, signature=u"nxs")
845
def CheckerCompleted(self, exitcode, waitstatus, command):
846
"D-Bus signal"
847
pass
848
849
# CheckerStarted - signal
850
@dbus.service.signal(_interface, signature=u"s")
851
def CheckerStarted(self, command):
852
"D-Bus signal"
853
pass
854
855
# PropertyChanged - signal
856
@dbus.service.signal(_interface, signature=u"sv")
857
def PropertyChanged(self, property, value):
858
"D-Bus signal"
859
pass
860
861
# GotSecret - signal
862
# XXXTEDDY Is sent after succesfull transfer of secret from mandos-server to mandos-client
863
@dbus.service.signal(_interface)
864
def GotSecret(self):
865
"D-Bus signal"
866
pass
867
868
# Rejected - signal
869
@dbus.service.signal(_interface, signature=u"s")
870
def Rejected(self, reason):
871
"D-Bus signal"
872
pass
873
874
# NeedApproval - signal
875
@dbus.service.signal(_interface, signature=u"db")
876
def NeedApproval(self, timeout, default):
877
"D-Bus signal"
878
pass
879
880
## Methods
881
882
# Approve - method
883
@dbus.service.method(_interface, in_signature=u"b")
884
def Approve(self, value):
885
self.approve(value)
886
887
# CheckedOK - method
888
@dbus.service.method(_interface)
889
def CheckedOK(self):
890
return self.checked_ok()
891
892
# Enable - method
893
@dbus.service.method(_interface)
894
def Enable(self):
895
"D-Bus method"
896
self.enable()
897
898
# StartChecker - method
899
@dbus.service.method(_interface)
900
def StartChecker(self):
901
"D-Bus method"
902
self.start_checker()
903
904
# Disable - method
905
@dbus.service.method(_interface)
906
def Disable(self):
907
"D-Bus method"
908
self.disable()
909
910
# StopChecker - method
911
@dbus.service.method(_interface)
912
def StopChecker(self):
913
self.stop_checker()
914
915
## Properties
916
917
# approved_pending - property
918
@dbus_service_property(_interface, signature=u"b", access=u"read")
919
def approved_pending_dbus_property(self):
920
return dbus.Boolean(bool(self.approvals_pending))
921
922
# approved_by_default - property
923
@dbus_service_property(_interface, signature=u"b",
924
access=u"readwrite")
925
def approved_by_default_dbus_property(self):
926
return dbus.Boolean(self.approved_by_default)
927
928
# approved_delay - property
929
@dbus_service_property(_interface, signature=u"t",
930
access=u"readwrite")
931
def approved_delay_dbus_property(self):
932
return dbus.UInt64(self.approved_delay_milliseconds())
933
934
# approved_duration - property
935
@dbus_service_property(_interface, signature=u"t",
936
access=u"readwrite")
937
def approved_duration_dbus_property(self):
938
return dbus.UInt64(self._timedelta_to_milliseconds(
939
self.approved_duration))
940
941
# name - property
942
@dbus_service_property(_interface, signature=u"s", access=u"read")
943
def name_dbus_property(self):
944
return dbus.String(self.name)
945
946
# fingerprint - property
947
@dbus_service_property(_interface, signature=u"s", access=u"read")
948
def fingerprint_dbus_property(self):
949
return dbus.String(self.fingerprint)
950
951
# host - property
952
@dbus_service_property(_interface, signature=u"s",
953
access=u"readwrite")
954
def host_dbus_property(self, value=None):
955
if value is None: # get
956
return dbus.String(self.host)
957
self.host = value
958
# Emit D-Bus signal
959
self.PropertyChanged(dbus.String(u"host"),
960
dbus.String(value, variant_level=1))
961
962
# created - property
963
@dbus_service_property(_interface, signature=u"s", access=u"read")
964
def created_dbus_property(self):
965
return dbus.String(self._datetime_to_dbus(self.created))
966
967
# last_enabled - property
968
@dbus_service_property(_interface, signature=u"s", access=u"read")
969
def last_enabled_dbus_property(self):
970
if self.last_enabled is None:
971
return dbus.String(u"")
972
return dbus.String(self._datetime_to_dbus(self.last_enabled))
973
974
# enabled - property
975
@dbus_service_property(_interface, signature=u"b",
976
access=u"readwrite")
977
def enabled_dbus_property(self, value=None):
978
if value is None: # get
979
return dbus.Boolean(self.enabled)
980
if value:
981
self.enable()
982
else:
983
self.disable()
984
985
# last_checked_ok - property
986
@dbus_service_property(_interface, signature=u"s",
987
access=u"readwrite")
988
def last_checked_ok_dbus_property(self, value=None):
989
if value is not None:
990
self.checked_ok()
991
return
376
def still_valid(self):
377
"""Has the timeout not yet passed for this client?"""
378
now = datetime.datetime.now()
992
379
if self.last_checked_ok is None:
993
return dbus.String(u"")
994
return dbus.String(self._datetime_to_dbus(self
995
.last_checked_ok))
996
997
# timeout - property
998
@dbus_service_property(_interface, signature=u"t",
999
access=u"readwrite")
1000
def timeout_dbus_property(self, value=None):
1001
if value is None: # get
1002
return dbus.UInt64(self.timeout_milliseconds())
1003
self.timeout = datetime.timedelta(0, 0, 0, value)
1004
# Emit D-Bus signal
1005
self.PropertyChanged(dbus.String(u"timeout"),
1006
dbus.UInt64(value, variant_level=1))
1007
if getattr(self, u"disable_initiator_tag", None) is None:
1008
return
1009
# Reschedule timeout
1010
gobject.source_remove(self.disable_initiator_tag)
1011
self.disable_initiator_tag = None
1012
time_to_die = (self.
1013
_timedelta_to_milliseconds((self
1014
.last_checked_ok
1015
+ self.timeout)
1016
- datetime.datetime
1017
.utcnow()))
1018
if time_to_die <= 0:
1019
# The timeout has passed
1020
self.disable()
1021
else:
1022
self.disable_initiator_tag = (gobject.timeout_add
1023
(time_to_die, self.disable))
1024
1025
# interval - property
1026
@dbus_service_property(_interface, signature=u"t",
1027
access=u"readwrite")
1028
def interval_dbus_property(self, value=None):
1029
if value is None: # get
1030
return dbus.UInt64(self.interval_milliseconds())
1031
self.interval = datetime.timedelta(0, 0, 0, value)
1032
# Emit D-Bus signal
1033
self.PropertyChanged(dbus.String(u"interval"),
1034
dbus.UInt64(value, variant_level=1))
1035
if getattr(self, u"checker_initiator_tag", None) is None:
1036
return
1037
# Reschedule checker run
1038
gobject.source_remove(self.checker_initiator_tag)
1039
self.checker_initiator_tag = (gobject.timeout_add
1040
(value, self.start_checker))
1041
self.start_checker() # Start one now, too
1042
1043
# checker - property
1044
@dbus_service_property(_interface, signature=u"s",
1045
access=u"readwrite")
1046
def checker_dbus_property(self, value=None):
1047
if value is None: # get
1048
return dbus.String(self.checker_command)
1049
self.checker_command = value
1050
# Emit D-Bus signal
1051
self.PropertyChanged(dbus.String(u"checker"),
1052
dbus.String(self.checker_command,
1053
variant_level=1))
1054
1055
# checker_running - property
1056
@dbus_service_property(_interface, signature=u"b",
1057
access=u"readwrite")
1058
def checker_running_dbus_property(self, value=None):
1059
if value is None: # get
1060
return dbus.Boolean(self.checker is not None)
1061
if value:
1062
self.start_checker()
1063
else:
1064
self.stop_checker()
1065
1066
# object_path - property
1067
@dbus_service_property(_interface, signature=u"o", access=u"read")
1068
def object_path_dbus_property(self):
1069
return self.dbus_object_path # is already a dbus.ObjectPath
1070
1071
# secret = property
1072
@dbus_service_property(_interface, signature=u"ay",
1073
access=u"write", byte_arrays=True)
1074
def secret_dbus_property(self, value):
1075
self.secret = str(value)
1076
1077
del _interface
1078
1079
1080
class ProxyClient(object):
1081
def __init__(self, child_pipe, fpr, address):
1082
self._pipe = child_pipe
1083
self._pipe.send(('init', fpr, address))
1084
if not self._pipe.recv():
1085
raise KeyError()
1086
1087
def __getattribute__(self, name):
1088
if(name == '_pipe'):
1089
return super(ProxyClient, self).__getattribute__(name)
1090
self._pipe.send(('getattr', name))
1091
data = self._pipe.recv()
1092
if data[0] == 'data':
1093
return data[1]
1094
if data[0] == 'function':
1095
def func(*args, **kwargs):
1096
self._pipe.send(('funcall', name, args, kwargs))
1097
return self._pipe.recv()[1]
1098
return func
1099
1100
def __setattr__(self, name, value):
1101
if(name == '_pipe'):
1102
return super(ProxyClient, self).__setattr__(name, value)
1103
self._pipe.send(('setattr', name, value))
1104
1105
1106
class ClientHandler(socketserver.BaseRequestHandler, object):
1107
"""A class to handle client connections.
1108
1109
Instantiated once for each connection to handle it.
380
return now < (self.created + self.timeout)
381
else:
382
return now < (self.last_checked_ok + self.timeout)
383
384
385
def peer_certificate(session):
386
"Return the peer's OpenPGP certificate as a bytestring"
387
# If not an OpenPGP certificate...
388
if gnutls.library.functions.gnutls_certificate_type_get\
389
(session._c_object) \
390
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
391
# ...do the normal thing
392
return session.peer_certificate
393
list_size = ctypes.c_uint()
394
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
395
(session._c_object, ctypes.byref(list_size))
396
if list_size.value == 0:
397
return None
398
cert = cert_list[0]
399
return ctypes.string_at(cert.data, cert.size)
400
401
402
def fingerprint(openpgp):
403
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
404
# New GnuTLS "datum" with the OpenPGP public key
405
datum = gnutls.library.types.gnutls_datum_t\
406
(ctypes.cast(ctypes.c_char_p(openpgp),
407
ctypes.POINTER(ctypes.c_ubyte)),
408
ctypes.c_uint(len(openpgp)))
409
# New empty GnuTLS certificate
410
crt = gnutls.library.types.gnutls_openpgp_crt_t()
411
gnutls.library.functions.gnutls_openpgp_crt_init\
412
(ctypes.byref(crt))
413
# Import the OpenPGP public key into the certificate
414
gnutls.library.functions.gnutls_openpgp_crt_import\
415
(crt, ctypes.byref(datum),
416
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
417
# Verify the self signature in the key
418
crtverify = ctypes.c_uint();
419
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
420
(crt, 0, ctypes.byref(crtverify))
421
if crtverify.value != 0:
422
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
423
raise gnutls.errors.CertificateSecurityError("Verify failed")
424
# New buffer for the fingerprint
425
buffer = ctypes.create_string_buffer(20)
426
buffer_length = ctypes.c_size_t()
427
# Get the fingerprint from the certificate into the buffer
428
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
429
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
430
# Deinit the certificate
431
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
432
# Convert the buffer to a Python bytestring
433
fpr = ctypes.string_at(buffer, buffer_length.value)
434
# Convert the bytestring to hexadecimal notation
435
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
436
return hex_fpr
437
438
439
class tcp_handler(SocketServer.BaseRequestHandler, object):
440
"""A TCP request handler class.
441
Instantiated by IPv6_TCPServer for each request to handle it.
1110
442
Note: This will run in its own forked process."""
1111
443
1112
444
def handle(self):
1113
with contextlib.closing(self.server.child_pipe) as child_pipe:
1114
logger.info(u"TCP connection from: %s",
1115
unicode(self.client_address))
1116
logger.debug(u"Pipe FD: %d",
1117
self.server.child_pipe.fileno())
1118
1119
session = (gnutls.connection
1120
.ClientSession(self.request,
1121
gnutls.connection
1122
.X509Credentials()))
1123
1124
# Note: gnutls.connection.X509Credentials is really a
1125
# generic GnuTLS certificate credentials object so long as
1126
# no X.509 keys are added to it. Therefore, we can use it
1127
# here despite using OpenPGP certificates.
1128
1129
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1130
# u"+AES-256-CBC", u"+SHA1",
1131
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1132
# u"+DHE-DSS"))
1133
# Use a fallback default, since this MUST be set.
1134
priority = self.server.gnutls_priority
1135
if priority is None:
1136
priority = u"NORMAL"
1137
(gnutls.library.functions
1138
.gnutls_priority_set_direct(session._c_object,
1139
priority, None))
1140
1141
# Start communication using the Mandos protocol
1142
# Get protocol number
1143
line = self.request.makefile().readline()
1144
logger.debug(u"Protocol version: %r", line)
1145
try:
1146
if int(line.strip().split()[0]) > 1:
1147
raise RuntimeError
1148
except (ValueError, IndexError, RuntimeError), error:
1149
logger.error(u"Unknown protocol version: %s", error)
1150
return
1151
1152
# Start GnuTLS connection
1153
try:
1154
session.handshake()
1155
except gnutls.errors.GNUTLSError, error:
1156
logger.warning(u"Handshake failed: %s", error)
1157
# Do not run session.bye() here: the session is not
1158
# established. Just abandon the request.
1159
return
1160
logger.debug(u"Handshake succeeded")
1161
1162
approval_required = False
1163
try:
1164
try:
1165
fpr = self.fingerprint(self.peer_certificate
1166
(session))
1167
except (TypeError, gnutls.errors.GNUTLSError), error:
1168
logger.warning(u"Bad certificate: %s", error)
1169
return
1170
logger.debug(u"Fingerprint: %s", fpr)
1171
1172
try:
1173
client = ProxyClient(child_pipe, fpr,
1174
self.client_address)
1175
except KeyError:
1176
return
1177
1178
if client.approved_delay:
1179
delay = client.approved_delay
1180
client.approvals_pending += 1
1181
approval_required = True
1182
1183
while True:
1184
if not client.enabled:
1185
logger.warning(u"Client %s is disabled",
1186
client.name)
1187
if self.server.use_dbus:
1188
# Emit D-Bus signal
1189
client.Rejected("Disabled")
1190
return
1191
1192
if client._approved or not client.approved_delay:
1193
#We are approved or approval is disabled
1194
break
1195
elif client._approved is None:
1196
logger.info(u"Client %s need approval",
1197
client.name)
1198
if self.server.use_dbus:
1199
# Emit D-Bus signal
1200
client.NeedApproval(
1201
client.approved_delay_milliseconds(),
1202
client.approved_by_default)
1203
else:
1204
logger.warning(u"Client %s was not approved",
1205
client.name)
1206
if self.server.use_dbus:
1207
# Emit D-Bus signal
1208
client.Rejected("Disapproved")
1209
return
1210
1211
#wait until timeout or approved
1212
#x = float(client._timedelta_to_milliseconds(delay))
1213
time = datetime.datetime.now()
1214
client.changedstate.acquire()
1215
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1216
client.changedstate.release()
1217
time2 = datetime.datetime.now()
1218
if (time2 - time) >= delay:
1219
if not client.approved_by_default:
1220
logger.warning("Client %s timed out while"
1221
" waiting for approval",
1222
client.name)
1223
if self.server.use_dbus:
1224
# Emit D-Bus signal
1225
client.Rejected("Time out")
1226
return
1227
else:
1228
break
1229
else:
1230
delay -= time2 - time
1231
1232
sent_size = 0
1233
while sent_size < len(client.secret):
1234
# XXX handle session exception
1235
sent = session.send(client.secret[sent_size:])
1236
logger.debug(u"Sent: %d, remaining: %d",
1237
sent, len(client.secret)
1238
- (sent_size + sent))
1239
sent_size += sent
1240
1241
logger.info(u"Sending secret to %s", client.name)
1242
# bump the timeout as if seen
1243
client.checked_ok()
1244
if self.server.use_dbus:
1245
# Emit D-Bus signal
1246
client.GotSecret()
1247
1248
finally:
1249
if approval_required:
1250
client.approvals_pending -= 1
1251
session.bye()
1252
1253
@staticmethod
1254
def peer_certificate(session):
1255
"Return the peer's OpenPGP certificate as a bytestring"
1256
# If not an OpenPGP certificate...
1257
if (gnutls.library.functions
1258
.gnutls_certificate_type_get(session._c_object)
1259
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1260
# ...do the normal thing
1261
return session.peer_certificate
1262
list_size = ctypes.c_uint(1)
1263
cert_list = (gnutls.library.functions
1264
.gnutls_certificate_get_peers
1265
(session._c_object, ctypes.byref(list_size)))
1266
if not bool(cert_list) and list_size.value != 0:
1267
raise gnutls.errors.GNUTLSError(u"error getting peer"
1268
u" certificate")
1269
if list_size.value == 0:
1270
return None
1271
cert = cert_list[0]
1272
return ctypes.string_at(cert.data, cert.size)
1273
1274
@staticmethod
1275
def fingerprint(openpgp):
1276
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1277
# New GnuTLS "datum" with the OpenPGP public key
1278
datum = (gnutls.library.types
1279
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1280
ctypes.POINTER
1281
(ctypes.c_ubyte)),
1282
ctypes.c_uint(len(openpgp))))
1283
# New empty GnuTLS certificate
1284
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1285
(gnutls.library.functions
1286
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1287
# Import the OpenPGP public key into the certificate
1288
(gnutls.library.functions
1289
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1290
gnutls.library.constants
1291
.GNUTLS_OPENPGP_FMT_RAW))
1292
# Verify the self signature in the key
1293
crtverify = ctypes.c_uint()
1294
(gnutls.library.functions
1295
.gnutls_openpgp_crt_verify_self(crt, 0,
1296
ctypes.byref(crtverify)))
1297
if crtverify.value != 0:
1298
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1299
raise (gnutls.errors.CertificateSecurityError
1300
(u"Verify failed"))
1301
# New buffer for the fingerprint
1302
buf = ctypes.create_string_buffer(20)
1303
buf_len = ctypes.c_size_t()
1304
# Get the fingerprint from the certificate into the buffer
1305
(gnutls.library.functions
1306
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1307
ctypes.byref(buf_len)))
1308
# Deinit the certificate
1309
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1310
# Convert the buffer to a Python bytestring
1311
fpr = ctypes.string_at(buf, buf_len.value)
1312
# Convert the bytestring to hexadecimal notation
1313
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1314
return hex_fpr
1315
1316
1317
class MultiprocessingMixIn(object):
1318
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1319
def sub_process_main(self, request, address):
1320
try:
1321
self.finish_request(request, address)
1322
except:
1323
self.handle_error(request, address)
1324
self.close_request(request)
1325
1326
def process_request(self, request, address):
1327
"""Start a new process to process the request."""
1328
multiprocessing.Process(target = self.sub_process_main,
1329
args = (request, address)).start()
1330
1331
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1332
""" adds a pipe to the MixIn """
1333
def process_request(self, request, client_address):
1334
"""Overrides and wraps the original process_request().
1335
1336
This function creates a new pipe in self.pipe
1337
"""
1338
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1339
1340
super(MultiprocessingMixInWithPipe,
1341
self).process_request(request, client_address)
1342
self.child_pipe.close()
1343
self.add_pipe(parent_pipe)
1344
1345
def add_pipe(self, parent_pipe):
1346
"""Dummy function; override as necessary"""
1347
pass
1348
1349
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1350
socketserver.TCPServer, object):
1351
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1352
445
logger.info(u"TCP connection from: %s",
446
unicode(self.client_address))
447
session = gnutls.connection.ClientSession\
448
(self.request, gnutls.connection.X509Credentials())
449
450
line = self.request.makefile().readline()
451
logger.debug(u"Protocol version: %r", line)
452
try:
453
if int(line.strip().split()[0]) > 1:
454
raise RuntimeError
455
except (ValueError, IndexError, RuntimeError), error:
456
logger.error(u"Unknown protocol version: %s", error)
457
return
458
459
# Note: gnutls.connection.X509Credentials is really a generic
460
# GnuTLS certificate credentials object so long as no X.509
461
# keys are added to it. Therefore, we can use it here despite
462
# using OpenPGP certificates.
463
464
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
465
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
466
# "+DHE-DSS"))
467
priority = "NORMAL" # Fallback default, since this
468
# MUST be set.
469
if self.server.settings["priority"]:
470
priority = self.server.settings["priority"]
471
gnutls.library.functions.gnutls_priority_set_direct\
472
(session._c_object, priority, None);
473
474
try:
475
session.handshake()
476
except gnutls.errors.GNUTLSError, error:
477
logger.warning(u"Handshake failed: %s", error)
478
# Do not run session.bye() here: the session is not
479
# established. Just abandon the request.
480
return
481
try:
482
fpr = fingerprint(peer_certificate(session))
483
except (TypeError, gnutls.errors.GNUTLSError), error:
484
logger.warning(u"Bad certificate: %s", error)
485
session.bye()
486
return
487
logger.debug(u"Fingerprint: %s", fpr)
488
client = None
489
for c in self.server.clients:
490
if c.fingerprint == fpr:
491
client = c
492
break
493
if not client:
494
logger.warning(u"Client not found for fingerprint: %s",
495
fpr)
496
session.bye()
497
return
498
# Have to check if client.still_valid(), since it is possible
499
# that the client timed out while establishing the GnuTLS
500
# session.
501
if not client.still_valid():
502
logger.warning(u"Client %(name)s is invalid",
503
vars(client))
504
session.bye()
505
return
506
sent_size = 0
507
while sent_size < len(client.secret):
508
sent = session.send(client.secret[sent_size:])
509
logger.debug(u"Sent: %d, remaining: %d",
510
sent, len(client.secret)
511
- (sent_size + sent))
512
sent_size += sent
513
session.bye()
514
515
516
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
517
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1353
518
Attributes:
519
settings: Server settings
520
clients: Set() of Client objects
1354
521
enabled: Boolean; whether this server is activated yet
1355
interface: None or a network interface name (string)
1356
use_ipv6: Boolean; to use IPv6 or not
1357
522
"""
1358
def __init__(self, server_address, RequestHandlerClass,
1359
interface=None, use_ipv6=True):
1360
self.interface = interface
1361
if use_ipv6:
1362
self.address_family = socket.AF_INET6
1363
socketserver.TCPServer.__init__(self, server_address,
1364
RequestHandlerClass)
523
address_family = socket.AF_INET6
524
def __init__(self, *args, **kwargs):
525
if "settings" in kwargs:
526
self.settings = kwargs["settings"]
527
del kwargs["settings"]
528
if "clients" in kwargs:
529
self.clients = kwargs["clients"]
530
del kwargs["clients"]
531
self.enabled = False
532
return super(type(self), self).__init__(*args, **kwargs)
1365
533
def server_bind(self):
1366
534
"""This overrides the normal server_bind() function
1367
535
to bind to an interface if one was specified, and also NOT to
1368
536
bind to an address or port if they were not specified."""
1369
if self.interface is not None:
1370
if SO_BINDTODEVICE is None:
1371
logger.error(u"SO_BINDTODEVICE does not exist;"
1372
u" cannot bind to interface %s",
1373
self.interface)
1374
else:
1375
try:
1376
self.socket.setsockopt(socket.SOL_SOCKET,
1377
SO_BINDTODEVICE,
1378
str(self.interface
1379
+ u'\0'))
1380
except socket.error, error:
1381
if error[0] == errno.EPERM:
1382
logger.error(u"No permission to"
1383
u" bind to interface %s",
1384
self.interface)
1385
elif error[0] == errno.ENOPROTOOPT:
1386
logger.error(u"SO_BINDTODEVICE not available;"
1387
u" cannot bind to interface %s",
1388
self.interface)
1389
else:
1390
raise
537
if self.settings["interface"]:
538
# 25 is from /usr/include/asm-i486/socket.h
539
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
540
try:
541
self.socket.setsockopt(socket.SOL_SOCKET,
542
SO_BINDTODEVICE,
543
self.settings["interface"])
544
except socket.error, error:
545
if error[0] == errno.EPERM:
546
logger.error(u"No permission to"
547
u" bind to interface %s",
548
self.settings["interface"])
549
else:
550
raise error
1391
551
# Only bind(2) the socket if we really need to.
1392
552
if self.server_address[0] or self.server_address[1]:
1393
553
if not self.server_address[0]:
1394
if self.address_family == socket.AF_INET6:
1395
any_address = u"::" # in6addr_any
1396
else:
1397
any_address = socket.INADDR_ANY
1398
self.server_address = (any_address,
554
in6addr_any = "::"
555
self.server_address = (in6addr_any,
1399
556
self.server_address[1])
1400
557
elif not self.server_address[1]:
1401
558
self.server_address = (self.server_address[0],
1402
559
0)
1403
# if self.interface:
560
# if self.settings["interface"]:
1404
561
# self.server_address = (self.server_address[0],
1405
562
# 0, # port
1406
563
# 0, # flowinfo
1407
564
# if_nametoindex
1408
# (self.interface))
1409
return socketserver.TCPServer.server_bind(self)
1410
1411
1412
class MandosServer(IPv6_TCPServer):
1413
"""Mandos server.
1414
1415
Attributes:
1416
clients: set of Client objects
1417
gnutls_priority GnuTLS priority string
1418
use_dbus: Boolean; to emit D-Bus signals or not
1419
1420
Assumes a gobject.MainLoop event loop.
1421
"""
1422
def __init__(self, server_address, RequestHandlerClass,
1423
interface=None, use_ipv6=True, clients=None,
1424
gnutls_priority=None, use_dbus=True):
1425
self.enabled = False
1426
self.clients = clients
1427
if self.clients is None:
1428
self.clients = set()
1429
self.use_dbus = use_dbus
1430
self.gnutls_priority = gnutls_priority
1431
IPv6_TCPServer.__init__(self, server_address,
1432
RequestHandlerClass,
1433
interface = interface,
1434
use_ipv6 = use_ipv6)
565
# (self.settings
566
# ["interface"]))
567
return super(type(self), self).server_bind()
1435
568
def server_activate(self):
1436
569
if self.enabled:
1437
return socketserver.TCPServer.server_activate(self)
570
return super(type(self), self).server_activate()
1438
571
def enable(self):
1439
572
self.enabled = True
1440
def add_pipe(self, parent_pipe):
1441
# Call "handle_ipc" for both data and EOF events
1442
gobject.io_add_watch(parent_pipe.fileno(),
1443
gobject.IO_IN | gobject.IO_HUP,
1444
functools.partial(self.handle_ipc,
1445
parent_pipe = parent_pipe))
1446
1447
def handle_ipc(self, source, condition, parent_pipe=None,
1448
client_object=None):
1449
condition_names = {
1450
gobject.IO_IN: u"IN", # There is data to read.
1451
gobject.IO_OUT: u"OUT", # Data can be written (without
1452
# blocking).
1453
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1454
gobject.IO_ERR: u"ERR", # Error condition.
1455
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1456
# broken, usually for pipes and
1457
# sockets).
1458
}
1459
conditions_string = ' | '.join(name
1460
for cond, name in
1461
condition_names.iteritems()
1462
if cond & condition)
1463
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1464
conditions_string)
1465
1466
# XXXTEDDY error or the other end of multiprocessing.Pipe has closed
1467
if condition & gobject.IO_HUP or condition & gobject.IO_ERR:
1468
return False
1469
1470
# Read a request from the child
1471
request = parent_pipe.recv()
1472
logger.debug(u"IPC request: %s", repr(request))
1473
command = request[0]
1474
1475
if command == 'init':
1476
fpr = request[1]
1477
address = request[2]
1478
1479
for c in self.clients:
1480
if c.fingerprint == fpr:
1481
client = c
1482
break
1483
else:
1484
logger.warning(u"Client not found for fingerprint: %s, ad"
1485
u"dress: %s", fpr, address)
1486
if self.use_dbus:
1487
# Emit D-Bus signal
1488
mandos_dbus_service.ClientNotFound(fpr, address)
1489
parent_pipe.send(False)
1490
return False
1491
1492
gobject.io_add_watch(parent_pipe.fileno(),
1493
gobject.IO_IN | gobject.IO_HUP,
1494
functools.partial(self.handle_ipc,
1495
parent_pipe = parent_pipe,
1496
client_object = client))
1497
parent_pipe.send(True)
1498
# remove the old hook in favor of the new above hook on same fileno
1499
return False
1500
if command == 'funcall':
1501
funcname = request[1]
1502
args = request[2]
1503
kwargs = request[3]
1504
1505
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1506
1507
if command == 'getattr':
1508
attrname = request[1]
1509
if callable(client_object.__getattribute__(attrname)):
1510
parent_pipe.send(('function',))
1511
else:
1512
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1513
1514
if command == 'setattr':
1515
attrname = request[1]
1516
value = request[2]
1517
setattr(client_object, attrname, value)
1518
1519
return True
1520
573
1521
574
1522
575
def string_to_delta(interval):
1523
576
"""Parse a string and return a datetime.timedelta
1524
1525
>>> string_to_delta(u'7d')
577
578
>>> string_to_delta('7d')
1526
579
datetime.timedelta(7)
1527
>>> string_to_delta(u'60s')
580
>>> string_to_delta('60s')
1528
581
datetime.timedelta(0, 60)
1529
>>> string_to_delta(u'60m')
582
>>> string_to_delta('60m')
1530
583
datetime.timedelta(0, 3600)
1531
>>> string_to_delta(u'24h')
584
>>> string_to_delta('24h')
1532
585
datetime.timedelta(1)
1533
586
>>> string_to_delta(u'1w')
1534
587
datetime.timedelta(7)
1535
>>> string_to_delta(u'5m 30s')
588
>>> string_to_delta('5m 30s')
1536
589
datetime.timedelta(0, 330)
1537
590
"""
1538
591
timevalue = datetime.timedelta(0)
1539
592
for s in interval.split():
1540
593
try:
1541
suffix = unicode(s[-1])
1542
value = int(s[:-1])
594
suffix=unicode(s[-1])
595
value=int(s[:-1])
1543
596
if suffix == u"d":
1544
597
delta = datetime.timedelta(value)
1545
598
elif suffix == u"s":
1551
604
elif suffix == u"w":
1552
605
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1553
606
else:
1554
raise ValueError(u"Unknown suffix %r" % suffix)
1555
except (ValueError, IndexError), e:
1556
raise ValueError(e.message)
607
raise ValueError
608
except (ValueError, IndexError):
609
raise ValueError
1557
610
timevalue += delta
1558
611
return timevalue
1559
612
1560
613
614
def server_state_changed(state):
615
"""Derived from the Avahi example code"""
616
if state == avahi.SERVER_COLLISION:
617
logger.error(u"Zeroconf server name collision")
618
service.remove()
619
elif state == avahi.SERVER_RUNNING:
620
service.add()
621
622
623
def entry_group_state_changed(state, error):
624
"""Derived from the Avahi example code"""
625
logger.debug(u"Avahi state change: %i", state)
626
627
if state == avahi.ENTRY_GROUP_ESTABLISHED:
628
logger.debug(u"Zeroconf service established.")
629
elif state == avahi.ENTRY_GROUP_COLLISION:
630
logger.warning(u"Zeroconf service name collision.")
631
service.rename()
632
elif state == avahi.ENTRY_GROUP_FAILURE:
633
logger.critical(u"Avahi: Error in group state changed %s",
634
unicode(error))
635
raise AvahiGroupError("State changed: %s", str(error))
636
1561
637
def if_nametoindex(interface):
1562
"""Call the C function if_nametoindex(), or equivalent
1563
1564
Note: This function cannot accept a unicode string."""
638
"""Call the C function if_nametoindex(), or equivalent"""
1565
639
global if_nametoindex
1566
640
try:
1567
if_nametoindex = (ctypes.cdll.LoadLibrary
1568
(ctypes.util.find_library(u"c"))
1569
.if_nametoindex)
641
if "ctypes.util" not in sys.modules:
642
import ctypes.util
643
if_nametoindex = ctypes.cdll.LoadLibrary\
644
(ctypes.util.find_library("c")).if_nametoindex
1570
645
except (OSError, AttributeError):
1571
logger.warning(u"Doing if_nametoindex the hard way")
646
if "struct" not in sys.modules:
647
import struct
648
if "fcntl" not in sys.modules:
649
import fcntl
1572
650
def if_nametoindex(interface):
1573
651
"Get an interface index the hard way, i.e. using fcntl()"
1574
652
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1575
with contextlib.closing(socket.socket()) as s:
1576
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1577
struct.pack(str(u"16s16x"),
1578
interface))
1579
interface_index = struct.unpack(str(u"I"),
1580
ifreq[16:20])[0]
653
s = socket.socket()
654
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
655
struct.pack("16s16x", interface))
656
s.close()
657
interface_index = struct.unpack("I", ifreq[16:20])[0]
1581
658
return interface_index
1582
659
return if_nametoindex(interface)
1583
660
1584
661
1585
662
def daemon(nochdir = False, noclose = False):
1586
663
"""See daemon(3). Standard BSD Unix function.
1587
1588
664
This should really exist as os.daemon, but it doesn't (yet)."""
1589
665
if os.fork():
1590
666
sys.exit()
1591
667
os.setsid()
1592
668
if not nochdir:
1593
os.chdir(u"/")
669
os.chdir("/")
1594
670
if os.fork():
1595
671
sys.exit()
1596
672
if not noclose:
1598
674
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1599
675
if not stat.S_ISCHR(os.fstat(null).st_mode):
1600
676
raise OSError(errno.ENODEV,
1601
u"%s not a character device"
1602
% os.path.devnull)
677
"/dev/null not a character device")
1603
678
os.dup2(null, sys.stdin.fileno())
1604
679
os.dup2(null, sys.stdout.fileno())
1605
680
os.dup2(null, sys.stderr.fileno())
1608
683
1609
684
1610
685
def main():
1611
1612
##################################################################
1613
# Parsing of options, both command line and config file
1614
1615
parser = optparse.OptionParser(version = "%%prog %s" % version)
1616
parser.add_option("-i", u"--interface", type=u"string",
1617
metavar="IF", help=u"Bind to interface IF")
1618
parser.add_option("-a", u"--address", type=u"string",
1619
help=u"Address to listen for requests on")
1620
parser.add_option("-p", u"--port", type=u"int",
1621
help=u"Port number to receive requests on")
1622
parser.add_option("--check", action=u"store_true",
1623
help=u"Run self-test")
1624
parser.add_option("--debug", action=u"store_true",
1625
help=u"Debug mode; run in foreground and log to"
1626
u" terminal")
1627
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1628
u" priority string (see GnuTLS documentation)")
1629
parser.add_option("--servicename", type=u"string",
1630
metavar=u"NAME", help=u"Zeroconf service name")
1631
parser.add_option("--configdir", type=u"string",
1632
default=u"/etc/mandos", metavar=u"DIR",
1633
help=u"Directory to search for configuration"
1634
u" files")
1635
parser.add_option("--no-dbus", action=u"store_false",
1636
dest=u"use_dbus", help=u"Do not provide D-Bus"
1637
u" system bus interface")
1638
parser.add_option("--no-ipv6", action=u"store_false",
1639
dest=u"use_ipv6", help=u"Do not use IPv6")
1640
options = parser.parse_args()[0]
686
global main_loop_started
687
main_loop_started = False
688
689
parser = OptionParser(version = "%%prog %s" % version)
690
parser.add_option("-i", "--interface", type="string",
691
metavar="IF", help="Bind to interface IF")
692
parser.add_option("-a", "--address", type="string",
693
help="Address to listen for requests on")
694
parser.add_option("-p", "--port", type="int",
695
help="Port number to receive requests on")
696
parser.add_option("--check", action="store_true", default=False,
697
help="Run self-test")
698
parser.add_option("--debug", action="store_true",
699
help="Debug mode; run in foreground and log to"
700
" terminal")
701
parser.add_option("--priority", type="string", help="GnuTLS"
702
" priority string (see GnuTLS documentation)")
703
parser.add_option("--servicename", type="string", metavar="NAME",
704
help="Zeroconf service name")
705
parser.add_option("--configdir", type="string",
706
default="/etc/mandos", metavar="DIR",
707
help="Directory to search for configuration"
708
" files")
709
(options, args) = parser.parse_args()
1641
710
1642
711
if options.check:
1643
712
import doctest
1645
714
sys.exit()
1646
715
1647
716
# Default values for config file for server-global settings
1648
server_defaults = { u"interface": u"",
1649
u"address": u"",
1650
u"port": u"",
1651
u"debug": u"False",
1652
u"priority":
1653
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1654
u"servicename": u"Mandos",
1655
u"use_dbus": u"True",
1656
u"use_ipv6": u"True",
717
server_defaults = { "interface": "",
718
"address": "",
719
"port": "",
720
"debug": "False",
721
"priority":
722
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
723
"servicename": "Mandos",
1657
724
}
1658
725
1659
726
# Parse config file for server-global settings
1660
server_config = configparser.SafeConfigParser(server_defaults)
727
server_config = ConfigParser.SafeConfigParser(server_defaults)
1661
728
del server_defaults
1662
server_config.read(os.path.join(options.configdir,
1663
u"mandos.conf"))
729
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1664
730
# Convert the SafeConfigParser object to a dict
1665
731
server_settings = server_config.defaults()
1666
# Use the appropriate methods on the non-string config options
1667
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1668
server_settings[option] = server_config.getboolean(u"DEFAULT",
1669
option)
1670
if server_settings["port"]:
1671
server_settings["port"] = server_config.getint(u"DEFAULT",
1672
u"port")
732
# Use getboolean on the boolean config option
733
server_settings["debug"] = server_config.getboolean\
734
("DEFAULT", "debug")
1673
735
del server_config
1674
736
1675
737
# Override the settings from the config file with command line
1676
738
# options, if set.
1677
for option in (u"interface", u"address", u"port", u"debug",
1678
u"priority", u"servicename", u"configdir",
1679
u"use_dbus", u"use_ipv6"):
739
for option in ("interface", "address", "port", "debug",
740
"priority", "servicename", "configdir"):
1680
741
value = getattr(options, option)
1681
742
if value is not None:
1682
743
server_settings[option] = value
1683
744
del options
1684
# Force all strings to be unicode
1685
for option in server_settings.keys():
1686
if type(server_settings[option]) is str:
1687
server_settings[option] = unicode(server_settings[option])
1688
745
# Now we have our good server settings in "server_settings"
1689
746
1690
##################################################################
1691
1692
# For convenience
1693
debug = server_settings[u"debug"]
1694
use_dbus = server_settings[u"use_dbus"]
1695
use_ipv6 = server_settings[u"use_ipv6"]
747
debug = server_settings["debug"]
1696
748
1697
749
if not debug:
1698
750
syslogger.setLevel(logging.WARNING)
1699
751
console.setLevel(logging.WARNING)
1700
752
1701
if server_settings[u"servicename"] != u"Mandos":
1702
syslogger.setFormatter(logging.Formatter
1703
(u'Mandos (%s) [%%(process)d]:'
1704
u' %%(levelname)s: %%(message)s'
1705
% server_settings[u"servicename"]))
753
if server_settings["servicename"] != "Mandos":
754
syslogger.setFormatter(logging.Formatter\
755
('Mandos (%s): %%(levelname)s:'
756
' %%(message)s'
757
% server_settings["servicename"]))
1706
758
1707
759
# Parse config file with clients
1708
client_defaults = { u"timeout": u"1h",
1709
u"interval": u"5m",
1710
u"checker": u"fping -q -- %%(host)s",
1711
u"host": u"",
1712
u"approved_delay": u"0s",
1713
u"approved_duration": u"1s",
760
client_defaults = { "timeout": "1h",
761
"interval": "5m",
762
"checker": "fping -q -- %(host)s",
763
"host": "",
1714
764
}
1715
client_config = configparser.SafeConfigParser(client_defaults)
1716
client_config.read(os.path.join(server_settings[u"configdir"],
1717
u"clients.conf"))
1718
1719
global mandos_dbus_service
1720
mandos_dbus_service = None
1721
1722
tcp_server = MandosServer((server_settings[u"address"],
1723
server_settings[u"port"]),
1724
ClientHandler,
1725
interface=server_settings[u"interface"],
1726
use_ipv6=use_ipv6,
1727
gnutls_priority=
1728
server_settings[u"priority"],
1729
use_dbus=use_dbus)
1730
pidfilename = u"/var/run/mandos.pid"
1731
try:
1732
pidfile = open(pidfilename, u"w")
1733
except IOError:
1734
logger.error(u"Could not open file %r", pidfilename)
1735
1736
try:
1737
uid = pwd.getpwnam(u"_mandos").pw_uid
1738
gid = pwd.getpwnam(u"_mandos").pw_gid
1739
except KeyError:
1740
try:
1741
uid = pwd.getpwnam(u"mandos").pw_uid
1742
gid = pwd.getpwnam(u"mandos").pw_gid
1743
except KeyError:
1744
try:
1745
uid = pwd.getpwnam(u"nobody").pw_uid
1746
gid = pwd.getpwnam(u"nobody").pw_gid
1747
except KeyError:
1748
uid = 65534
1749
gid = 65534
1750
try:
765
client_config = ConfigParser.SafeConfigParser(client_defaults)
766
client_config.read(os.path.join(server_settings["configdir"],
767
"clients.conf"))
768
769
clients = Set()
770
tcp_server = IPv6_TCPServer((server_settings["address"],
771
server_settings["port"]),
772
tcp_handler,
773
settings=server_settings,
774
clients=clients)
775
pidfilename = "/var/run/mandos.pid"
776
try:
777
pidfile = open(pidfilename, "w")
778
except IOError, error:
779
logger.error("Could not open file %r", pidfilename)
780
781
uid = 65534
782
gid = 65534
783
try:
784
uid = pwd.getpwnam("mandos").pw_uid
785
except KeyError:
786
try:
787
uid = pwd.getpwnam("nobody").pw_uid
788
except KeyError:
789
pass
790
try:
791
gid = pwd.getpwnam("mandos").pw_gid
792
except KeyError:
793
try:
794
gid = pwd.getpwnam("nogroup").pw_gid
795
except KeyError:
796
pass
797
try:
798
os.setuid(uid)
1751
799
os.setgid(gid)
1752
os.setuid(uid)
1753
800
except OSError, error:
1754
801
if error[0] != errno.EPERM:
1755
802
raise error
1756
803
1757
# Enable all possible GnuTLS debugging
1758
if debug:
1759
# "Use a log level over 10 to enable all debugging options."
1760
# - GnuTLS manual
1761
gnutls.library.functions.gnutls_global_set_log_level(11)
1762
1763
@gnutls.library.types.gnutls_log_func
1764
def debug_gnutls(level, string):
1765
logger.debug(u"GnuTLS: %s", string[:-1])
1766
1767
(gnutls.library.functions
1768
.gnutls_global_set_log_function(debug_gnutls))
804
global service
805
service = AvahiService(name = server_settings["servicename"],
806
type = "_mandos._tcp", );
807
if server_settings["interface"]:
808
service.interface = if_nametoindex\
809
(server_settings["interface"])
1769
810
1770
811
global main_loop
812
global bus
813
global server
1771
814
# From the Avahi example code
1772
815
DBusGMainLoop(set_as_default=True )
1773
816
main_loop = gobject.MainLoop()
1774
817
bus = dbus.SystemBus()
818
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
819
avahi.DBUS_PATH_SERVER),
820
avahi.DBUS_INTERFACE_SERVER)
1775
821
# End of Avahi example code
1776
if use_dbus:
1777
try:
1778
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1779
bus, do_not_queue=True)
1780
except dbus.exceptions.NameExistsException, e:
1781
logger.error(unicode(e) + u", disabling D-Bus")
1782
use_dbus = False
1783
server_settings[u"use_dbus"] = False
1784
tcp_server.use_dbus = False
1785
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1786
service = AvahiService(name = server_settings[u"servicename"],
1787
servicetype = u"_mandos._tcp",
1788
protocol = protocol, bus = bus)
1789
if server_settings["interface"]:
1790
service.interface = (if_nametoindex
1791
(str(server_settings[u"interface"])))
1792
1793
global multiprocessing_manager
1794
multiprocessing_manager = multiprocessing.Manager()
1795
1796
client_class = Client
1797
if use_dbus:
1798
client_class = functools.partial(ClientDBus, bus = bus)
1799
def client_config_items(config, section):
1800
special_settings = {
1801
"approved_by_default":
1802
lambda: config.getboolean(section,
1803
"approved_by_default"),
1804
}
1805
for name, value in config.items(section):
1806
try:
1807
yield (name, special_settings[name]())
1808
except KeyError:
1809
yield (name, value)
1810
1811
tcp_server.clients.update(set(
1812
client_class(name = section,
1813
config= dict(client_config_items(
1814
client_config, section)))
1815
for section in client_config.sections()))
1816
if not tcp_server.clients:
1817
logger.warning(u"No clients defined")
822
823
def remove_from_clients(client):
824
clients.remove(client)
825
if not clients:
826
logger.critical(u"No clients left, exiting")
827
sys.exit()
828
829
clients.update(Set(Client(name = section,
830
stop_hook = remove_from_clients,
831
config
832
= dict(client_config.items(section)))
833
for section in client_config.sections()))
834
if not clients:
835
logger.critical(u"No clients defined")
836
sys.exit(1)
1818
837
1819
838
if debug:
1820
839
# Redirect stdin so all checkers get /dev/null
1829
848
daemon()
1830
849
1831
850
try:
1832
with pidfile:
1833
pid = os.getpid()
1834
pidfile.write(str(pid) + "\n")
851
pid = os.getpid()
852
pidfile.write(str(pid) + "\n")
853
pidfile.close()
1835
854
del pidfile
1836
except IOError:
855
except IOError, err:
1837
856
logger.error(u"Could not write to file %r with PID %d",
1838
857
pidfilename, pid)
1839
858
except NameError:
1841
860
pass
1842
861
del pidfilename
1843
862
863
def cleanup():
864
"Cleanup function; run on exit"
865
global group
866
# From the Avahi example code
867
if not group is None:
868
group.Free()
869
group = None
870
# End of Avahi example code
871
872
while clients:
873
client = clients.pop()
874
client.stop_hook = None
875
client.stop()
876
877
atexit.register(cleanup)
878
1844
879
if not debug:
1845
880
signal.signal(signal.SIGINT, signal.SIG_IGN)
1846
881
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1847
882
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1848
883
1849
if use_dbus:
1850
class MandosDBusService(dbus.service.Object):
1851
"""A D-Bus proxy object"""
1852
def __init__(self):
1853
dbus.service.Object.__init__(self, bus, u"/")
1854
_interface = u"se.bsnet.fukt.Mandos"
1855
1856
@dbus.service.signal(_interface, signature=u"o")
1857
def ClientAdded(self, objpath):
1858
"D-Bus signal"
1859
pass
1860
1861
@dbus.service.signal(_interface, signature=u"ss")
1862
def ClientNotFound(self, fingerprint, address):
1863
"D-Bus signal"
1864
pass
1865
1866
@dbus.service.signal(_interface, signature=u"os")
1867
def ClientRemoved(self, objpath, name):
1868
"D-Bus signal"
1869
pass
1870
1871
@dbus.service.method(_interface, out_signature=u"ao")
1872
def GetAllClients(self):
1873
"D-Bus method"
1874
return dbus.Array(c.dbus_object_path
1875
for c in tcp_server.clients)
1876
1877
@dbus.service.method(_interface,
1878
out_signature=u"a{oa{sv}}")
1879
def GetAllClientsWithProperties(self):
1880
"D-Bus method"
1881
return dbus.Dictionary(
1882
((c.dbus_object_path, c.GetAll(u""))
1883
for c in tcp_server.clients),
1884
signature=u"oa{sv}")
1885
1886
@dbus.service.method(_interface, in_signature=u"o")
1887
def RemoveClient(self, object_path):
1888
"D-Bus method"
1889
for c in tcp_server.clients:
1890
if c.dbus_object_path == object_path:
1891
tcp_server.clients.remove(c)
1892
c.remove_from_connection()
1893
# Don't signal anything except ClientRemoved
1894
c.disable(quiet=True)
1895
# Emit D-Bus signal
1896
self.ClientRemoved(object_path, c.name)
1897
return
1898
raise KeyError(object_path)
1899
1900
del _interface
1901
1902
mandos_dbus_service = MandosDBusService()
1903
1904
def cleanup():
1905
"Cleanup function; run on exit"
1906
service.cleanup()
1907
1908
while tcp_server.clients:
1909
client = tcp_server.clients.pop()
1910
if use_dbus:
1911
client.remove_from_connection()
1912
client.disable_hook = None
1913
# Don't signal anything except ClientRemoved
1914
client.disable(quiet=True)
1915
if use_dbus:
1916
# Emit D-Bus signal
1917
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1918
client.name)
1919
1920
atexit.register(cleanup)
1921
1922
for client in tcp_server.clients:
1923
if use_dbus:
1924
# Emit D-Bus signal
1925
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1926
client.enable()
884
for client in clients:
885
client.start()
1927
886
1928
887
tcp_server.enable()
1929
888
tcp_server.server_activate()
1930
889
1931
890
# Find out what port we got
1932
891
service.port = tcp_server.socket.getsockname()[1]
1933
if use_ipv6:
1934
logger.info(u"Now listening on address %r, port %d,"
1935
" flowinfo %d, scope_id %d"
1936
% tcp_server.socket.getsockname())
1937
else: # IPv4
1938
logger.info(u"Now listening on address %r, port %d"
1939
% tcp_server.socket.getsockname())
892
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
893
u" scope_id %d" % tcp_server.socket.getsockname())
1940
894
1941
895
#service.interface = tcp_server.socket.getsockname()[3]
1942
896
1943
897
try:
1944
898
# From the Avahi example code
899
server.connect_to_signal("StateChanged", server_state_changed)
1945
900
try:
1946
service.activate()
901
server_state_changed(server.GetState())
1947
902
except dbus.exceptions.DBusException, error:
1948
903
logger.critical(u"DBusException: %s", error)
1949
cleanup()
1950
904
sys.exit(1)
1951
905
# End of Avahi example code
1952
906
1953
907
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1954
908
lambda *args, **kwargs:
1955
(tcp_server.handle_request
1956
(*args[2:], **kwargs) or True))
909
tcp_server.handle_request\
910
(*args[2:], **kwargs) or True)
1957
911
1958
912
logger.debug(u"Starting main loop")
913
main_loop_started = True
1959
914
main_loop.run()
1960
915
except AvahiError, error:
1961
logger.critical(u"AvahiError: %s", error)
1962
cleanup()
916
logger.critical(u"AvahiError: %s" + unicode(error))
1963
917
sys.exit(1)
1964
918
except KeyboardInterrupt:
1965
919
if debug:
1966
print >> sys.stderr
1967
logger.debug(u"Server received KeyboardInterrupt")
1968
logger.debug(u"Server exiting")
1969
# Must run before the D-Bus bus name gets deregistered
1970
cleanup()
920
print
1971
921
1972
922
if __name__ == '__main__':
1973
923
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0