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- Committer: Teddy Hogeborn
- Date: 2008-10-18 11:17:22 UTC
- Revision ID: teddy@fukt.bsnet.se-20081018111722-jtbz35c031lxuuc9
* debian/mandos-client.docs (NEWS): Added.
* debian/mandos.docs (NEWS): - '' -
* debian/mandos.docs (NEWS): - '' -
- files added:
- debian/mandos-client.config
- files removed:
- dbus-mandos.conf
- files modified:
- INSTALL
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2008 Teddy Hogeborn & Björn Påhlsson
16
15
#
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
31
30
# Contact the authors at <mandos@fukt.bsnet.se>.
32
31
#
33
32
34
from __future__ import division, with_statement, absolute_import
33
from __future__ import division
35
34
36
import SocketServer as socketserver
35
import SocketServer
37
36
import socket
38
import optparse
37
from optparse import OptionParser
39
38
import datetime
40
39
import errno
41
40
import gnutls.crypto
44
43
import gnutls.library.functions
45
44
import gnutls.library.constants
46
45
import gnutls.library.types
47
import ConfigParser as configparser
46
import ConfigParser
48
47
import sys
49
48
import re
50
49
import os
51
50
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
57
import pwd
58
import contextlib
59
import struct
60
import fcntl
61
import functools
62
import cPickle as pickle
63
import multiprocessing
64
58
65
59
import dbus
66
import dbus.service
67
60
import gobject
68
61
import avahi
69
62
from dbus.mainloop.glib import DBusGMainLoop
70
63
import ctypes
71
64
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
syslogger = (logging.handlers.SysLogHandler
88
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
89
address = "/dev/log"))
90
syslogger.setFormatter(logging.Formatter
91
(u'Mandos [%(process)d]: %(levelname)s:'
92
u' %(message)s'))
65
66
version = "1.0.2"
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'))
93
74
logger.addHandler(syslogger)
94
75
95
76
console = logging.StreamHandler()
96
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
97
u' %(levelname)s:'
98
u' %(message)s'))
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
78
' %(message)s'))
99
79
logger.addHandler(console)
100
80
101
multiprocessing_manager = multiprocessing.Manager()
102
103
81
class AvahiError(Exception):
104
def __init__(self, value, *args, **kwargs):
82
def __init__(self, value):
105
83
self.value = value
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
84
super(AvahiError, self).__init__()
85
def __str__(self):
86
return repr(self.value)
109
87
110
88
class AvahiServiceError(AvahiError):
111
89
pass
116
94
117
95
class AvahiService(object):
118
96
"""An Avahi (Zeroconf) service.
119
120
97
Attributes:
121
98
interface: integer; avahi.IF_UNSPEC or an interface index.
122
99
Used to optionally bind to the specified interface.
123
name: string; Example: u'Mandos'
124
type: string; Example: u'_mandos._tcp'.
100
name: string; Example: 'Mandos'
101
type: string; Example: '_mandos._tcp'.
125
102
See <http://www.dns-sd.org/ServiceTypes.html>
126
103
port: integer; what port to announce
127
104
TXT: list of strings; TXT record for the service
130
107
max_renames: integer; maximum number of renames
131
108
rename_count: integer; counter so we only rename after collisions
132
109
a sensible number of times
133
group: D-Bus Entry Group
134
server: D-Bus Server
135
bus: dbus.SystemBus()
136
110
"""
137
111
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
138
servicetype = None, port = None, TXT = None,
139
domain = u"", host = u"", max_renames = 32768,
140
protocol = avahi.PROTO_UNSPEC, bus = None):
112
servicetype = None, port = None, TXT = None, domain = "",
113
host = "", max_renames = 32768):
141
114
self.interface = interface
142
115
self.name = name
143
116
self.type = servicetype
144
117
self.port = port
145
self.TXT = TXT if TXT is not None else []
118
if TXT is None:
119
self.TXT = []
120
else:
121
self.TXT = TXT
146
122
self.domain = domain
147
123
self.host = host
148
124
self.rename_count = 0
149
125
self.max_renames = max_renames
150
self.protocol = protocol
151
self.group = None # our entry group
152
self.server = None
153
self.bus = bus
154
126
def rename(self):
155
127
"""Derived from the Avahi example code"""
156
128
if self.rename_count >= self.max_renames:
157
129
logger.critical(u"No suitable Zeroconf service name found"
158
130
u" after %i retries, exiting.",
159
131
self.rename_count)
160
raise AvahiServiceError(u"Too many renames")
161
self.name = self.server.GetAlternativeServiceName(self.name)
132
raise AvahiServiceError("Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
162
134
logger.info(u"Changing Zeroconf service name to %r ...",
163
unicode(self.name))
164
syslogger.setFormatter(logging.Formatter
165
(u'Mandos (%s) [%%(process)d]:'
166
u' %%(levelname)s: %%(message)s'
167
% self.name))
135
str(self.name))
136
syslogger.setFormatter(logging.Formatter\
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
168
139
self.remove()
169
140
self.add()
170
141
self.rename_count += 1
171
142
def remove(self):
172
143
"""Derived from the Avahi example code"""
173
if self.group is not None:
174
self.group.Reset()
144
if group is not None:
145
group.Reset()
175
146
def add(self):
176
147
"""Derived from the Avahi example code"""
177
if self.group is None:
178
self.group = dbus.Interface(
179
self.bus.get_object(avahi.DBUS_NAME,
180
self.server.EntryGroupNew()),
181
avahi.DBUS_INTERFACE_ENTRY_GROUP)
182
self.group.connect_to_signal('StateChanged',
183
self
184
.entry_group_state_changed)
148
global group
149
if group is None:
150
group = dbus.Interface\
151
(bus.get_object(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
185
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
186
self.name, self.type)
187
self.group.AddService(
188
self.interface,
189
self.protocol,
190
dbus.UInt32(0), # flags
191
self.name, self.type,
192
self.domain, self.host,
193
dbus.UInt16(self.port),
194
avahi.string_array_to_txt_array(self.TXT))
195
self.group.Commit()
196
def entry_group_state_changed(self, state, error):
197
"""Derived from the Avahi example code"""
198
logger.debug(u"Avahi state change: %i", state)
199
200
if state == avahi.ENTRY_GROUP_ESTABLISHED:
201
logger.debug(u"Zeroconf service established.")
202
elif state == avahi.ENTRY_GROUP_COLLISION:
203
logger.warning(u"Zeroconf service name collision.")
204
self.rename()
205
elif state == avahi.ENTRY_GROUP_FAILURE:
206
logger.critical(u"Avahi: Error in group state changed %s",
207
unicode(error))
208
raise AvahiGroupError(u"State changed: %s"
209
% unicode(error))
210
def cleanup(self):
211
"""Derived from the Avahi example code"""
212
if self.group is not None:
213
self.group.Free()
214
self.group = None
215
def server_state_changed(self, state):
216
"""Derived from the Avahi example code"""
217
if state == avahi.SERVER_COLLISION:
218
logger.error(u"Zeroconf server name collision")
219
self.remove()
220
elif state == avahi.SERVER_RUNNING:
221
self.add()
222
def activate(self):
223
"""Derived from the Avahi example code"""
224
if self.server is None:
225
self.server = dbus.Interface(
226
self.bus.get_object(avahi.DBUS_NAME,
227
avahi.DBUS_PATH_SERVER),
228
avahi.DBUS_INTERFACE_SERVER)
229
self.server.connect_to_signal(u"StateChanged",
230
self.server_state_changed)
231
self.server_state_changed(self.server.GetState())
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
232
171
233
172
234
173
class Client(object):
235
174
"""A representation of a client host served by this server.
236
237
175
Attributes:
238
name: string; from the config file, used in log messages and
239
D-Bus identifiers
176
name: string; from the config file, used in log messages
240
177
fingerprint: string (40 or 32 hexadecimal digits); used to
241
178
uniquely identify the client
242
secret: bytestring; sent verbatim (over TLS) to client
243
host: string; available for use by the checker command
244
created: datetime.datetime(); (UTC) object creation
245
last_enabled: datetime.datetime(); (UTC)
246
enabled: bool()
247
last_checked_ok: datetime.datetime(); (UTC) or None
248
timeout: datetime.timedelta(); How long from last_checked_ok
249
until this client is disabled
250
interval: datetime.timedelta(); How often to start a new checker
251
disable_hook: If set, called by disable() as disable_hook(self)
252
checker: subprocess.Popen(); a running checker process used
253
to see if the client lives.
254
'None' if no process is running.
179
secret: bytestring; sent verbatim (over TLS) to client
180
host: string; available for use by the checker command
181
created: datetime.datetime(); object creation, not client host
182
last_checked_ok: datetime.datetime() or None if not yet checked OK
183
timeout: datetime.timedelta(); How long from last_checked_ok
184
until this client is invalid
185
interval: datetime.timedelta(); How often to start a new checker
186
stop_hook: If set, called by stop() as stop_hook(self)
187
checker: subprocess.Popen(); a running checker process used
188
to see if the client lives.
189
'None' if no process is running.
255
190
checker_initiator_tag: a gobject event source tag, or None
256
disable_initiator_tag: - '' -
191
stop_initiator_tag: - '' -
257
192
checker_callback_tag: - '' -
258
193
checker_command: string; External command which is run to check if
259
194
client lives. %() expansions are done at
260
195
runtime with vars(self) as dict, so that for
261
196
instance %(name)s can be used in the command.
262
current_checker_command: string; current running checker_command
263
approved_delay: datetime.timedelta(); Time to wait for approval
264
_approved: bool(); 'None' if not yet approved/disapproved
265
approved_duration: datetime.timedelta(); Duration of one approval
197
Private attibutes:
198
_timeout: Real variable for 'timeout'
199
_interval: Real variable for 'interval'
200
_timeout_milliseconds: Used when calling gobject.timeout_add()
201
_interval_milliseconds: - '' -
266
202
"""
267
268
@staticmethod
269
def _timedelta_to_milliseconds(td):
270
"Convert a datetime.timedelta() to milliseconds"
271
return ((td.days * 24 * 60 * 60 * 1000)
272
+ (td.seconds * 1000)
273
+ (td.microseconds // 1000))
274
275
def timeout_milliseconds(self):
276
"Return the 'timeout' attribute in milliseconds"
277
return self._timedelta_to_milliseconds(self.timeout)
278
279
def interval_milliseconds(self):
280
"Return the 'interval' attribute in milliseconds"
281
return self._timedelta_to_milliseconds(self.interval)
282
283
def approved_delay_milliseconds(self):
284
return self._timedelta_to_milliseconds(self.approved_delay)
285
286
def __init__(self, name = None, disable_hook=None, config=None):
203
def _set_timeout(self, timeout):
204
"Setter function for 'timeout' attribute"
205
self._timeout = timeout
206
self._timeout_milliseconds = ((self.timeout.days
207
* 24 * 60 * 60 * 1000)
208
+ (self.timeout.seconds * 1000)
209
+ (self.timeout.microseconds
210
// 1000))
211
timeout = property(lambda self: self._timeout,
212
_set_timeout)
213
del _set_timeout
214
def _set_interval(self, interval):
215
"Setter function for 'interval' attribute"
216
self._interval = interval
217
self._interval_milliseconds = ((self.interval.days
218
* 24 * 60 * 60 * 1000)
219
+ (self.interval.seconds
220
* 1000)
221
+ (self.interval.microseconds
222
// 1000))
223
interval = property(lambda self: self._interval,
224
_set_interval)
225
del _set_interval
226
def __init__(self, name = None, stop_hook=None, config=None):
287
227
"""Note: the 'checker' key in 'config' sets the
288
228
'checker_command' attribute and *not* the 'checker'
289
229
attribute."""
290
self.name = name
291
230
if config is None:
292
231
config = {}
232
self.name = name
293
233
logger.debug(u"Creating client %r", self.name)
294
234
# Uppercase and remove spaces from fingerprint for later
295
235
# comparison purposes with return value from the fingerprint()
296
236
# function
297
self.fingerprint = (config[u"fingerprint"].upper()
298
.replace(u" ", u""))
237
self.fingerprint = config["fingerprint"].upper()\
238
.replace(u" ", u"")
299
239
logger.debug(u" Fingerprint: %s", self.fingerprint)
300
if u"secret" in config:
301
self.secret = config[u"secret"].decode(u"base64")
302
elif u"secfile" in config:
303
with open(os.path.expanduser(os.path.expandvars
304
(config[u"secfile"])),
305
"rb") as secfile:
306
self.secret = secfile.read()
240
if "secret" in config:
241
self.secret = config["secret"].decode(u"base64")
242
elif "secfile" in config:
243
secfile = open(os.path.expanduser(os.path.expandvars
244
(config["secfile"])))
245
self.secret = secfile.read()
246
secfile.close()
307
247
else:
308
#XXX Need to allow secret on demand!
309
248
raise TypeError(u"No secret or secfile for client %s"
310
249
% self.name)
311
self.host = config.get(u"host", u"")
312
self.created = datetime.datetime.utcnow()
313
self.enabled = False
314
self.last_enabled = None
250
self.host = config.get("host", "")
251
self.created = datetime.datetime.now()
315
252
self.last_checked_ok = None
316
self.timeout = string_to_delta(config[u"timeout"])
317
self.interval = string_to_delta(config[u"interval"])
318
self.disable_hook = disable_hook
253
self.timeout = string_to_delta(config["timeout"])
254
self.interval = string_to_delta(config["interval"])
255
self.stop_hook = stop_hook
319
256
self.checker = None
320
257
self.checker_initiator_tag = None
321
self.disable_initiator_tag = None
258
self.stop_initiator_tag = None
322
259
self.checker_callback_tag = None
323
self.checker_command = config[u"checker"]
324
self.current_checker_command = None
325
self.last_connect = None
326
self.approvals_pending = 0
327
self._approved = None
328
self.approved_by_default = config.get(u"approved_by_default",
329
True)
330
self.approved_delay = string_to_delta(
331
config[u"approved_delay"])
332
self.approved_duration = string_to_delta(
333
config[u"approved_duration"])
334
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
335
336
def send_changedstate(self):
337
self.changedstate.acquire()
338
self.changedstate.notify_all()
339
self.changedstate.release()
340
341
def enable(self):
260
self.check_command = config["checker"]
261
def start(self):
342
262
"""Start this client's checker and timeout hooks"""
343
if getattr(self, u"enabled", False):
344
# Already enabled
345
return
346
self.send_changedstate()
347
self.last_enabled = datetime.datetime.utcnow()
348
263
# Schedule a new checker to be started an 'interval' from now,
349
264
# and every interval from then on.
350
self.checker_initiator_tag = (gobject.timeout_add
351
(self.interval_milliseconds(),
352
self.start_checker))
353
# Schedule a disable() when 'timeout' has passed
354
self.disable_initiator_tag = (gobject.timeout_add
355
(self.timeout_milliseconds(),
356
self.disable))
357
self.enabled = True
265
self.checker_initiator_tag = gobject.timeout_add\
266
(self._interval_milliseconds,
267
self.start_checker)
358
268
# Also start a new checker *right now*.
359
269
self.start_checker()
360
361
def disable(self, quiet=True):
362
"""Disable this client."""
363
if not getattr(self, "enabled", False):
270
# Schedule a stop() when 'timeout' has passed
271
self.stop_initiator_tag = gobject.timeout_add\
272
(self._timeout_milliseconds,
273
self.stop)
274
def stop(self):
275
"""Stop this client.
276
The possibility that a client might be restarted is left open,
277
but not currently used."""
278
# If this client doesn't have a secret, it is already stopped.
279
if hasattr(self, "secret") and self.secret:
280
logger.info(u"Stopping client %s", self.name)
281
self.secret = None
282
else:
364
283
return False
365
if not quiet:
366
self.send_changedstate()
367
if not quiet:
368
logger.info(u"Disabling client %s", self.name)
369
if getattr(self, u"disable_initiator_tag", False):
370
gobject.source_remove(self.disable_initiator_tag)
371
self.disable_initiator_tag = None
372
if getattr(self, u"checker_initiator_tag", False):
284
if getattr(self, "stop_initiator_tag", False):
285
gobject.source_remove(self.stop_initiator_tag)
286
self.stop_initiator_tag = None
287
if getattr(self, "checker_initiator_tag", False):
373
288
gobject.source_remove(self.checker_initiator_tag)
374
289
self.checker_initiator_tag = None
375
290
self.stop_checker()
376
if self.disable_hook:
377
self.disable_hook(self)
378
self.enabled = False
291
if self.stop_hook:
292
self.stop_hook(self)
379
293
# Do not run this again if called by a gobject.timeout_add
380
294
return False
381
382
295
def __del__(self):
383
self.disable_hook = None
384
self.disable()
385
386
def checker_callback(self, pid, condition, command):
296
self.stop_hook = None
297
self.stop()
298
def checker_callback(self, pid, condition):
387
299
"""The checker has completed, so take appropriate actions."""
300
now = datetime.datetime.now()
388
301
self.checker_callback_tag = None
389
302
self.checker = None
390
if os.WIFEXITED(condition):
391
exitstatus = os.WEXITSTATUS(condition)
392
if exitstatus == 0:
393
logger.info(u"Checker for %(name)s succeeded",
394
vars(self))
395
self.checked_ok()
396
else:
397
logger.info(u"Checker for %(name)s failed",
398
vars(self))
399
else:
303
if os.WIFEXITED(condition) \
304
and (os.WEXITSTATUS(condition) == 0):
305
logger.info(u"Checker for %(name)s succeeded",
306
vars(self))
307
self.last_checked_ok = now
308
gobject.source_remove(self.stop_initiator_tag)
309
self.stop_initiator_tag = gobject.timeout_add\
310
(self._timeout_milliseconds,
311
self.stop)
312
elif not os.WIFEXITED(condition):
400
313
logger.warning(u"Checker for %(name)s crashed?",
401
314
vars(self))
402
403
def checked_ok(self):
404
"""Bump up the timeout for this client.
405
406
This should only be called when the client has been seen,
407
alive and well.
408
"""
409
self.last_checked_ok = datetime.datetime.utcnow()
410
gobject.source_remove(self.disable_initiator_tag)
411
self.disable_initiator_tag = (gobject.timeout_add
412
(self.timeout_milliseconds(),
413
self.disable))
414
315
else:
316
logger.info(u"Checker for %(name)s failed",
317
vars(self))
415
318
def start_checker(self):
416
319
"""Start a new checker subprocess if one is not running.
417
418
320
If a checker already exists, leave it running and do
419
321
nothing."""
420
322
# The reason for not killing a running checker is that if we
423
325
# client would inevitably timeout, since no checker would get
424
326
# a chance to run to completion. If we instead leave running
425
327
# checkers alone, the checker would have to take more time
426
# than 'timeout' for the client to be disabled, which is as it
427
# should be.
428
429
# If a checker exists, make sure it is not a zombie
430
try:
431
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
432
except (AttributeError, OSError), error:
433
if (isinstance(error, OSError)
434
and error.errno != errno.ECHILD):
435
raise error
436
else:
437
if pid:
438
logger.warning(u"Checker was a zombie")
439
gobject.source_remove(self.checker_callback_tag)
440
self.checker_callback(pid, status,
441
self.current_checker_command)
442
# Start a new checker if needed
328
# than 'timeout' for the client to be declared invalid, which
329
# is as it should be.
443
330
if self.checker is None:
444
331
try:
445
# In case checker_command has exactly one % operator
446
command = self.checker_command % self.host
332
# In case check_command has exactly one % operator
333
command = self.check_command % self.host
447
334
except TypeError:
448
335
# Escape attributes for the shell
449
escaped_attrs = dict((key,
450
re.escape(unicode(str(val),
451
errors=
452
u'replace')))
336
escaped_attrs = dict((key, re.escape(str(val)))
453
337
for key, val in
454
338
vars(self).iteritems())
455
339
try:
456
command = self.checker_command % escaped_attrs
340
command = self.check_command % escaped_attrs
457
341
except TypeError, error:
458
342
logger.error(u'Could not format string "%s":'
459
u' %s', self.checker_command, error)
343
u' %s', self.check_command, error)
460
344
return True # Try again later
461
self.current_checker_command = command
462
345
try:
463
346
logger.info(u"Starting checker %r for %s",
464
347
command, self.name)
468
351
# always replaced by /dev/null.)
469
352
self.checker = subprocess.Popen(command,
470
353
close_fds=True,
471
shell=True, cwd=u"/")
472
self.checker_callback_tag = (gobject.child_watch_add
473
(self.checker.pid,
474
self.checker_callback,
475
data=command))
476
# The checker may have completed before the gobject
477
# watch was added. Check for this.
478
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
479
if pid:
480
gobject.source_remove(self.checker_callback_tag)
481
self.checker_callback(pid, status, command)
354
shell=True, cwd="/")
355
self.checker_callback_tag = gobject.child_watch_add\
356
(self.checker.pid,
357
self.checker_callback)
482
358
except OSError, error:
483
359
logger.error(u"Failed to start subprocess: %s",
484
360
error)
485
361
# Re-run this periodically if run by gobject.timeout_add
486
362
return True
487
488
363
def stop_checker(self):
489
364
"""Force the checker process, if any, to stop."""
490
365
if self.checker_callback_tag:
491
366
gobject.source_remove(self.checker_callback_tag)
492
367
self.checker_callback_tag = None
493
if getattr(self, u"checker", None) is None:
368
if getattr(self, "checker", None) is None:
494
369
return
495
370
logger.debug(u"Stopping checker for %(name)s", vars(self))
496
371
try:
497
372
os.kill(self.checker.pid, signal.SIGTERM)
498
#time.sleep(0.5)
373
#os.sleep(0.5)
499
374
#if self.checker.poll() is None:
500
375
# os.kill(self.checker.pid, signal.SIGKILL)
501
376
except OSError, error:
502
377
if error.errno != errno.ESRCH: # No such process
503
378
raise
504
379
self.checker = None
505
506
def dbus_service_property(dbus_interface, signature=u"v",
507
access=u"readwrite", byte_arrays=False):
508
"""Decorators for marking methods of a DBusObjectWithProperties to
509
become properties on the D-Bus.
510
511
The decorated method will be called with no arguments by "Get"
512
and with one argument by "Set".
513
514
The parameters, where they are supported, are the same as
515
dbus.service.method, except there is only "signature", since the
516
type from Get() and the type sent to Set() is the same.
517
"""
518
# Encoding deeply encoded byte arrays is not supported yet by the
519
# "Set" method, so we fail early here:
520
if byte_arrays and signature != u"ay":
521
raise ValueError(u"Byte arrays not supported for non-'ay'"
522
u" signature %r" % signature)
523
def decorator(func):
524
func._dbus_is_property = True
525
func._dbus_interface = dbus_interface
526
func._dbus_signature = signature
527
func._dbus_access = access
528
func._dbus_name = func.__name__
529
if func._dbus_name.endswith(u"_dbus_property"):
530
func._dbus_name = func._dbus_name[:-14]
531
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
532
return func
533
return decorator
534
535
536
class DBusPropertyException(dbus.exceptions.DBusException):
537
"""A base class for D-Bus property-related exceptions
538
"""
539
def __unicode__(self):
540
return unicode(str(self))
541
542
543
class DBusPropertyAccessException(DBusPropertyException):
544
"""A property's access permissions disallows an operation.
545
"""
546
pass
547
548
549
class DBusPropertyNotFound(DBusPropertyException):
550
"""An attempt was made to access a non-existing property.
551
"""
552
pass
553
554
555
class DBusObjectWithProperties(dbus.service.Object):
556
"""A D-Bus object with properties.
557
558
Classes inheriting from this can use the dbus_service_property
559
decorator to expose methods as D-Bus properties. It exposes the
560
standard Get(), Set(), and GetAll() methods on the D-Bus.
561
"""
562
563
@staticmethod
564
def _is_dbus_property(obj):
565
return getattr(obj, u"_dbus_is_property", False)
566
567
def _get_all_dbus_properties(self):
568
"""Returns a generator of (name, attribute) pairs
569
"""
570
return ((prop._dbus_name, prop)
571
for name, prop in
572
inspect.getmembers(self, self._is_dbus_property))
573
574
def _get_dbus_property(self, interface_name, property_name):
575
"""Returns a bound method if one exists which is a D-Bus
576
property with the specified name and interface.
577
"""
578
for name in (property_name,
579
property_name + u"_dbus_property"):
580
prop = getattr(self, name, None)
581
if (prop is None
582
or not self._is_dbus_property(prop)
583
or prop._dbus_name != property_name
584
or (interface_name and prop._dbus_interface
585
and interface_name != prop._dbus_interface)):
586
continue
587
return prop
588
# No such property
589
raise DBusPropertyNotFound(self.dbus_object_path + u":"
590
+ interface_name + u"."
591
+ property_name)
592
593
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
594
out_signature=u"v")
595
def Get(self, interface_name, property_name):
596
"""Standard D-Bus property Get() method, see D-Bus standard.
597
"""
598
prop = self._get_dbus_property(interface_name, property_name)
599
if prop._dbus_access == u"write":
600
raise DBusPropertyAccessException(property_name)
601
value = prop()
602
if not hasattr(value, u"variant_level"):
603
return value
604
return type(value)(value, variant_level=value.variant_level+1)
605
606
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
607
def Set(self, interface_name, property_name, value):
608
"""Standard D-Bus property Set() method, see D-Bus standard.
609
"""
610
prop = self._get_dbus_property(interface_name, property_name)
611
if prop._dbus_access == u"read":
612
raise DBusPropertyAccessException(property_name)
613
if prop._dbus_get_args_options[u"byte_arrays"]:
614
# The byte_arrays option is not supported yet on
615
# signatures other than "ay".
616
if prop._dbus_signature != u"ay":
617
raise ValueError
618
value = dbus.ByteArray(''.join(unichr(byte)
619
for byte in value))
620
prop(value)
621
622
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
623
out_signature=u"a{sv}")
624
def GetAll(self, interface_name):
625
"""Standard D-Bus property GetAll() method, see D-Bus
626
standard.
627
628
Note: Will not include properties with access="write".
629
"""
630
all = {}
631
for name, prop in self._get_all_dbus_properties():
632
if (interface_name
633
and interface_name != prop._dbus_interface):
634
# Interface non-empty but did not match
635
continue
636
# Ignore write-only properties
637
if prop._dbus_access == u"write":
638
continue
639
value = prop()
640
if not hasattr(value, u"variant_level"):
641
all[name] = value
642
continue
643
all[name] = type(value)(value, variant_level=
644
value.variant_level+1)
645
return dbus.Dictionary(all, signature=u"sv")
646
647
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
648
out_signature=u"s",
649
path_keyword='object_path',
650
connection_keyword='connection')
651
def Introspect(self, object_path, connection):
652
"""Standard D-Bus method, overloaded to insert property tags.
653
"""
654
xmlstring = dbus.service.Object.Introspect(self, object_path,
655
connection)
656
try:
657
document = xml.dom.minidom.parseString(xmlstring)
658
def make_tag(document, name, prop):
659
e = document.createElement(u"property")
660
e.setAttribute(u"name", name)
661
e.setAttribute(u"type", prop._dbus_signature)
662
e.setAttribute(u"access", prop._dbus_access)
663
return e
664
for if_tag in document.getElementsByTagName(u"interface"):
665
for tag in (make_tag(document, name, prop)
666
for name, prop
667
in self._get_all_dbus_properties()
668
if prop._dbus_interface
669
== if_tag.getAttribute(u"name")):
670
if_tag.appendChild(tag)
671
# Add the names to the return values for the
672
# "org.freedesktop.DBus.Properties" methods
673
if (if_tag.getAttribute(u"name")
674
== u"org.freedesktop.DBus.Properties"):
675
for cn in if_tag.getElementsByTagName(u"method"):
676
if cn.getAttribute(u"name") == u"Get":
677
for arg in cn.getElementsByTagName(u"arg"):
678
if (arg.getAttribute(u"direction")
679
== u"out"):
680
arg.setAttribute(u"name", u"value")
681
elif cn.getAttribute(u"name") == u"GetAll":
682
for arg in cn.getElementsByTagName(u"arg"):
683
if (arg.getAttribute(u"direction")
684
== u"out"):
685
arg.setAttribute(u"name", u"props")
686
xmlstring = document.toxml(u"utf-8")
687
document.unlink()
688
except (AttributeError, xml.dom.DOMException,
689
xml.parsers.expat.ExpatError), error:
690
logger.error(u"Failed to override Introspection method",
691
error)
692
return xmlstring
693
694
695
class ClientDBus(Client, DBusObjectWithProperties):
696
"""A Client class using D-Bus
697
698
Attributes:
699
dbus_object_path: dbus.ObjectPath
700
bus: dbus.SystemBus()
701
"""
702
# dbus.service.Object doesn't use super(), so we can't either.
703
704
def __init__(self, bus = None, *args, **kwargs):
705
self._approvals_pending = 0
706
self.bus = bus
707
Client.__init__(self, *args, **kwargs)
708
# Only now, when this client is initialized, can it show up on
709
# the D-Bus
710
self.dbus_object_path = (dbus.ObjectPath
711
(u"/clients/"
712
+ self.name.replace(u".", u"_")))
713
DBusObjectWithProperties.__init__(self, self.bus,
714
self.dbus_object_path)
715
716
def _get_approvals_pending(self, value):
717
return self._approvals_pending
718
def _set_approvals_pending(self, value):
719
old_value = self._approvals_pending
720
self._approvals_pending = value
721
bval = bool(value)
722
if (hasattr(self, "dbus_object_path")
723
and bval is bool(old_value)):
724
dbus_bool = dbus.Boolean(bval, variant_level=1)
725
self.PropertyChanged(dbus.String(u"approved_pending"),
726
dbus_bool)
727
return value
728
approvals_pending = property(_get_approvals_pending,
729
_set_approvals_pending)
730
del _get_approvals_pending, _set_approvals_pending
731
732
@staticmethod
733
def _datetime_to_dbus(dt, variant_level=0):
734
"""Convert a UTC datetime.datetime() to a D-Bus type."""
735
return dbus.String(dt.isoformat(),
736
variant_level=variant_level)
737
738
def enable(self):
739
oldstate = getattr(self, u"enabled", False)
740
r = Client.enable(self)
741
if oldstate != self.enabled:
742
# Emit D-Bus signals
743
self.PropertyChanged(dbus.String(u"enabled"),
744
dbus.Boolean(True, variant_level=1))
745
self.PropertyChanged(
746
dbus.String(u"last_enabled"),
747
self._datetime_to_dbus(self.last_enabled,
748
variant_level=1))
749
return r
750
751
def disable(self, quiet = False):
752
oldstate = getattr(self, u"enabled", False)
753
r = Client.disable(self, quiet=quiet)
754
if not quiet and oldstate != self.enabled:
755
# Emit D-Bus signal
756
self.PropertyChanged(dbus.String(u"enabled"),
757
dbus.Boolean(False, variant_level=1))
758
return r
759
760
def __del__(self, *args, **kwargs):
761
try:
762
self.remove_from_connection()
763
except LookupError:
764
pass
765
if hasattr(DBusObjectWithProperties, u"__del__"):
766
DBusObjectWithProperties.__del__(self, *args, **kwargs)
767
Client.__del__(self, *args, **kwargs)
768
769
def checker_callback(self, pid, condition, command,
770
*args, **kwargs):
771
self.checker_callback_tag = None
772
self.checker = None
773
# Emit D-Bus signal
774
self.PropertyChanged(dbus.String(u"checker_running"),
775
dbus.Boolean(False, variant_level=1))
776
if os.WIFEXITED(condition):
777
exitstatus = os.WEXITSTATUS(condition)
778
# Emit D-Bus signal
779
self.CheckerCompleted(dbus.Int16(exitstatus),
780
dbus.Int64(condition),
781
dbus.String(command))
782
else:
783
# Emit D-Bus signal
784
self.CheckerCompleted(dbus.Int16(-1),
785
dbus.Int64(condition),
786
dbus.String(command))
787
788
return Client.checker_callback(self, pid, condition, command,
789
*args, **kwargs)
790
791
def checked_ok(self, *args, **kwargs):
792
r = Client.checked_ok(self, *args, **kwargs)
793
# Emit D-Bus signal
794
self.PropertyChanged(
795
dbus.String(u"last_checked_ok"),
796
(self._datetime_to_dbus(self.last_checked_ok,
797
variant_level=1)))
798
return r
799
800
def start_checker(self, *args, **kwargs):
801
old_checker = self.checker
802
if self.checker is not None:
803
old_checker_pid = self.checker.pid
804
else:
805
old_checker_pid = None
806
r = Client.start_checker(self, *args, **kwargs)
807
# Only if new checker process was started
808
if (self.checker is not None
809
and old_checker_pid != self.checker.pid):
810
# Emit D-Bus signal
811
self.CheckerStarted(self.current_checker_command)
812
self.PropertyChanged(
813
dbus.String(u"checker_running"),
814
dbus.Boolean(True, variant_level=1))
815
return r
816
817
def stop_checker(self, *args, **kwargs):
818
old_checker = getattr(self, u"checker", None)
819
r = Client.stop_checker(self, *args, **kwargs)
820
if (old_checker is not None
821
and getattr(self, u"checker", None) is None):
822
self.PropertyChanged(dbus.String(u"checker_running"),
823
dbus.Boolean(False, variant_level=1))
824
return r
825
826
def _reset_approved(self):
827
self._approved = None
828
return False
829
830
def approve(self, value=True):
831
self._approved = value
832
gobject.timeout_add(self._timedelta_to_milliseconds(self.approved_duration, self._reset_approved))
833
834
835
## D-Bus methods, signals & properties
836
_interface = u"se.bsnet.fukt.Mandos.Client"
837
838
## Signals
839
840
# CheckerCompleted - signal
841
@dbus.service.signal(_interface, signature=u"nxs")
842
def CheckerCompleted(self, exitcode, waitstatus, command):
843
"D-Bus signal"
844
pass
845
846
# CheckerStarted - signal
847
@dbus.service.signal(_interface, signature=u"s")
848
def CheckerStarted(self, command):
849
"D-Bus signal"
850
pass
851
852
# PropertyChanged - signal
853
@dbus.service.signal(_interface, signature=u"sv")
854
def PropertyChanged(self, property, value):
855
"D-Bus signal"
856
pass
857
858
# GotSecret - signal
859
@dbus.service.signal(_interface)
860
def GotSecret(self):
861
"D-Bus signal"
862
pass
863
864
# Rejected - signal
865
@dbus.service.signal(_interface, signature=u"s")
866
def Rejected(self, reason):
867
"D-Bus signal"
868
pass
869
870
# NeedApproval - signal
871
@dbus.service.signal(_interface, signature=u"db")
872
def NeedApproval(self, timeout, default):
873
"D-Bus signal"
874
pass
875
876
## Methods
877
878
# Approve - method
879
@dbus.service.method(_interface, in_signature=u"b")
880
def Approve(self, value):
881
self.approve(value)
882
883
# CheckedOK - method
884
@dbus.service.method(_interface)
885
def CheckedOK(self):
886
return self.checked_ok()
887
888
# Enable - method
889
@dbus.service.method(_interface)
890
def Enable(self):
891
"D-Bus method"
892
self.enable()
893
894
# StartChecker - method
895
@dbus.service.method(_interface)
896
def StartChecker(self):
897
"D-Bus method"
898
self.start_checker()
899
900
# Disable - method
901
@dbus.service.method(_interface)
902
def Disable(self):
903
"D-Bus method"
904
self.disable()
905
906
# StopChecker - method
907
@dbus.service.method(_interface)
908
def StopChecker(self):
909
self.stop_checker()
910
911
## Properties
912
913
# approved_pending - property
914
@dbus_service_property(_interface, signature=u"b", access=u"read")
915
def approved_pending_dbus_property(self):
916
return dbus.Boolean(bool(self.approvals_pending))
917
918
# approved_by_default - property
919
@dbus_service_property(_interface, signature=u"b",
920
access=u"readwrite")
921
def approved_by_default_dbus_property(self):
922
return dbus.Boolean(self.approved_by_default)
923
924
# approved_delay - property
925
@dbus_service_property(_interface, signature=u"t",
926
access=u"readwrite")
927
def approved_delay_dbus_property(self):
928
return dbus.UInt64(self.approved_delay_milliseconds())
929
930
# approved_duration - property
931
@dbus_service_property(_interface, signature=u"t",
932
access=u"readwrite")
933
def approved_duration_dbus_property(self):
934
return dbus.UInt64(self._timedelta_to_milliseconds(
935
self.approved_duration))
936
937
# name - property
938
@dbus_service_property(_interface, signature=u"s", access=u"read")
939
def name_dbus_property(self):
940
return dbus.String(self.name)
941
942
# fingerprint - property
943
@dbus_service_property(_interface, signature=u"s", access=u"read")
944
def fingerprint_dbus_property(self):
945
return dbus.String(self.fingerprint)
946
947
# host - property
948
@dbus_service_property(_interface, signature=u"s",
949
access=u"readwrite")
950
def host_dbus_property(self, value=None):
951
if value is None: # get
952
return dbus.String(self.host)
953
self.host = value
954
# Emit D-Bus signal
955
self.PropertyChanged(dbus.String(u"host"),
956
dbus.String(value, variant_level=1))
957
958
# created - property
959
@dbus_service_property(_interface, signature=u"s", access=u"read")
960
def created_dbus_property(self):
961
return dbus.String(self._datetime_to_dbus(self.created))
962
963
# last_enabled - property
964
@dbus_service_property(_interface, signature=u"s", access=u"read")
965
def last_enabled_dbus_property(self):
966
if self.last_enabled is None:
967
return dbus.String(u"")
968
return dbus.String(self._datetime_to_dbus(self.last_enabled))
969
970
# enabled - property
971
@dbus_service_property(_interface, signature=u"b",
972
access=u"readwrite")
973
def enabled_dbus_property(self, value=None):
974
if value is None: # get
975
return dbus.Boolean(self.enabled)
976
if value:
977
self.enable()
978
else:
979
self.disable()
980
981
# last_checked_ok - property
982
@dbus_service_property(_interface, signature=u"s",
983
access=u"readwrite")
984
def last_checked_ok_dbus_property(self, value=None):
985
if value is not None:
986
self.checked_ok()
987
return
380
def still_valid(self):
381
"""Has the timeout not yet passed for this client?"""
382
now = datetime.datetime.now()
988
383
if self.last_checked_ok is None:
989
return dbus.String(u"")
990
return dbus.String(self._datetime_to_dbus(self
991
.last_checked_ok))
992
993
# timeout - property
994
@dbus_service_property(_interface, signature=u"t",
995
access=u"readwrite")
996
def timeout_dbus_property(self, value=None):
997
if value is None: # get
998
return dbus.UInt64(self.timeout_milliseconds())
999
self.timeout = datetime.timedelta(0, 0, 0, value)
1000
# Emit D-Bus signal
1001
self.PropertyChanged(dbus.String(u"timeout"),
1002
dbus.UInt64(value, variant_level=1))
1003
if getattr(self, u"disable_initiator_tag", None) is None:
1004
return
1005
# Reschedule timeout
1006
gobject.source_remove(self.disable_initiator_tag)
1007
self.disable_initiator_tag = None
1008
time_to_die = (self.
1009
_timedelta_to_milliseconds((self
1010
.last_checked_ok
1011
+ self.timeout)
1012
- datetime.datetime
1013
.utcnow()))
1014
if time_to_die <= 0:
1015
# The timeout has passed
1016
self.disable()
1017
else:
1018
self.disable_initiator_tag = (gobject.timeout_add
1019
(time_to_die, self.disable))
1020
1021
# interval - property
1022
@dbus_service_property(_interface, signature=u"t",
1023
access=u"readwrite")
1024
def interval_dbus_property(self, value=None):
1025
if value is None: # get
1026
return dbus.UInt64(self.interval_milliseconds())
1027
self.interval = datetime.timedelta(0, 0, 0, value)
1028
# Emit D-Bus signal
1029
self.PropertyChanged(dbus.String(u"interval"),
1030
dbus.UInt64(value, variant_level=1))
1031
if getattr(self, u"checker_initiator_tag", None) is None:
1032
return
1033
# Reschedule checker run
1034
gobject.source_remove(self.checker_initiator_tag)
1035
self.checker_initiator_tag = (gobject.timeout_add
1036
(value, self.start_checker))
1037
self.start_checker() # Start one now, too
1038
1039
# checker - property
1040
@dbus_service_property(_interface, signature=u"s",
1041
access=u"readwrite")
1042
def checker_dbus_property(self, value=None):
1043
if value is None: # get
1044
return dbus.String(self.checker_command)
1045
self.checker_command = value
1046
# Emit D-Bus signal
1047
self.PropertyChanged(dbus.String(u"checker"),
1048
dbus.String(self.checker_command,
1049
variant_level=1))
1050
1051
# checker_running - property
1052
@dbus_service_property(_interface, signature=u"b",
1053
access=u"readwrite")
1054
def checker_running_dbus_property(self, value=None):
1055
if value is None: # get
1056
return dbus.Boolean(self.checker is not None)
1057
if value:
1058
self.start_checker()
1059
else:
1060
self.stop_checker()
1061
1062
# object_path - property
1063
@dbus_service_property(_interface, signature=u"o", access=u"read")
1064
def object_path_dbus_property(self):
1065
return self.dbus_object_path # is already a dbus.ObjectPath
1066
1067
# secret = property
1068
@dbus_service_property(_interface, signature=u"ay",
1069
access=u"write", byte_arrays=True)
1070
def secret_dbus_property(self, value):
1071
self.secret = str(value)
1072
1073
del _interface
1074
1075
1076
class ProxyClient(object):
1077
def __init__(self, child_pipe, fpr, address):
1078
self._pipe = child_pipe
1079
self._pipe.send(('init', fpr, address))
1080
if not self._pipe.recv():
1081
raise KeyError()
1082
1083
def __getattribute__(self, name):
1084
if(name == '_pipe'):
1085
return super(ProxyClient, self).__getattribute__(name)
1086
self._pipe.send(('getattr', name))
1087
data = self._pipe.recv()
1088
if data[0] == 'data':
1089
return data[1]
1090
if data[0] == 'function':
1091
def func(*args, **kwargs):
1092
self._pipe.send(('funcall', name, args, kwargs))
1093
return self._pipe.recv()[1]
1094
return func
1095
1096
def __setattr__(self, name, value):
1097
if(name == '_pipe'):
1098
return super(ProxyClient, self).__setattr__(name, value)
1099
self._pipe.send(('setattr', name, value))
1100
1101
1102
class ClientHandler(socketserver.BaseRequestHandler, object):
1103
"""A class to handle client connections.
1104
1105
Instantiated once for each connection to handle it.
384
return now < (self.created + self.timeout)
385
else:
386
return now < (self.last_checked_ok + self.timeout)
387
388
389
def peer_certificate(session):
390
"Return the peer's OpenPGP certificate as a bytestring"
391
# If not an OpenPGP certificate...
392
if gnutls.library.functions.gnutls_certificate_type_get\
393
(session._c_object) \
394
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
395
# ...do the normal thing
396
return session.peer_certificate
397
list_size = ctypes.c_uint()
398
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
399
(session._c_object, ctypes.byref(list_size))
400
if list_size.value == 0:
401
return None
402
cert = cert_list[0]
403
return ctypes.string_at(cert.data, cert.size)
404
405
406
def fingerprint(openpgp):
407
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
408
# New GnuTLS "datum" with the OpenPGP public key
409
datum = gnutls.library.types.gnutls_datum_t\
410
(ctypes.cast(ctypes.c_char_p(openpgp),
411
ctypes.POINTER(ctypes.c_ubyte)),
412
ctypes.c_uint(len(openpgp)))
413
# New empty GnuTLS certificate
414
crt = gnutls.library.types.gnutls_openpgp_crt_t()
415
gnutls.library.functions.gnutls_openpgp_crt_init\
416
(ctypes.byref(crt))
417
# Import the OpenPGP public key into the certificate
418
gnutls.library.functions.gnutls_openpgp_crt_import\
419
(crt, ctypes.byref(datum),
420
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
421
# Verify the self signature in the key
422
crtverify = ctypes.c_uint()
423
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
424
(crt, 0, ctypes.byref(crtverify))
425
if crtverify.value != 0:
426
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
427
raise gnutls.errors.CertificateSecurityError("Verify failed")
428
# New buffer for the fingerprint
429
buf = ctypes.create_string_buffer(20)
430
buf_len = ctypes.c_size_t()
431
# Get the fingerprint from the certificate into the buffer
432
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
433
(crt, ctypes.byref(buf), ctypes.byref(buf_len))
434
# Deinit the certificate
435
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
436
# Convert the buffer to a Python bytestring
437
fpr = ctypes.string_at(buf, buf_len.value)
438
# Convert the bytestring to hexadecimal notation
439
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
440
return hex_fpr
441
442
443
class TCP_handler(SocketServer.BaseRequestHandler, object):
444
"""A TCP request handler class.
445
Instantiated by IPv6_TCPServer for each request to handle it.
1106
446
Note: This will run in its own forked process."""
1107
447
1108
448
def handle(self):
1109
with contextlib.closing(self.server.child_pipe) as child_pipe:
1110
logger.info(u"TCP connection from: %s",
1111
unicode(self.client_address))
1112
logger.debug(u"Pipe FD: %d",
1113
self.server.child_pipe.fileno())
1114
1115
session = (gnutls.connection
1116
.ClientSession(self.request,
1117
gnutls.connection
1118
.X509Credentials()))
1119
1120
# Note: gnutls.connection.X509Credentials is really a
1121
# generic GnuTLS certificate credentials object so long as
1122
# no X.509 keys are added to it. Therefore, we can use it
1123
# here despite using OpenPGP certificates.
1124
1125
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1126
# u"+AES-256-CBC", u"+SHA1",
1127
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1128
# u"+DHE-DSS"))
1129
# Use a fallback default, since this MUST be set.
1130
priority = self.server.gnutls_priority
1131
if priority is None:
1132
priority = u"NORMAL"
1133
(gnutls.library.functions
1134
.gnutls_priority_set_direct(session._c_object,
1135
priority, None))
1136
1137
# Start communication using the Mandos protocol
1138
# Get protocol number
1139
line = self.request.makefile().readline()
1140
logger.debug(u"Protocol version: %r", line)
1141
try:
1142
if int(line.strip().split()[0]) > 1:
1143
raise RuntimeError
1144
except (ValueError, IndexError, RuntimeError), error:
1145
logger.error(u"Unknown protocol version: %s", error)
1146
return
1147
1148
# Start GnuTLS connection
1149
try:
1150
session.handshake()
1151
except gnutls.errors.GNUTLSError, error:
1152
logger.warning(u"Handshake failed: %s", error)
1153
# Do not run session.bye() here: the session is not
1154
# established. Just abandon the request.
1155
return
1156
logger.debug(u"Handshake succeeded")
1157
1158
approval_required = False
1159
try:
1160
try:
1161
fpr = self.fingerprint(self.peer_certificate
1162
(session))
1163
except (TypeError, gnutls.errors.GNUTLSError), error:
1164
logger.warning(u"Bad certificate: %s", error)
1165
return
1166
logger.debug(u"Fingerprint: %s", fpr)
1167
1168
try:
1169
client = ProxyClient(child_pipe, fpr,
1170
self.client_address)
1171
except KeyError:
1172
return
1173
1174
if client.approved_delay:
1175
delay = client.approved_delay
1176
client.approvals_pending += 1
1177
approval_required = True
1178
1179
while True:
1180
if not client.enabled:
1181
logger.warning(u"Client %s is disabled",
1182
client.name)
1183
if self.server.use_dbus:
1184
# Emit D-Bus signal
1185
client.Rejected("Disabled")
1186
return
1187
1188
if client._approved or not client.approved_delay:
1189
#We are approved or approval is disabled
1190
break
1191
elif client._approved is None:
1192
logger.info(u"Client %s need approval",
1193
client.name)
1194
if self.server.use_dbus:
1195
# Emit D-Bus signal
1196
client.NeedApproval(
1197
client.approved_delay_milliseconds(),
1198
client.approved_by_default)
1199
else:
1200
logger.warning(u"Client %s was not approved",
1201
client.name)
1202
if self.server.use_dbus:
1203
# Emit D-Bus signal
1204
client.Rejected("Disapproved")
1205
return
1206
1207
#wait until timeout or approved
1208
#x = float(client._timedelta_to_milliseconds(delay))
1209
time = datetime.datetime.now()
1210
client.changedstate.acquire()
1211
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1212
client.changedstate.release()
1213
time2 = datetime.datetime.now()
1214
if (time2 - time) >= delay:
1215
if not client.approved_by_default:
1216
logger.warning("Client %s timed out while"
1217
" waiting for approval",
1218
client.name)
1219
if self.server.use_dbus:
1220
# Emit D-Bus signal
1221
client.Rejected("Time out")
1222
return
1223
else:
1224
break
1225
else:
1226
delay -= time2 - time
1227
1228
sent_size = 0
1229
while sent_size < len(client.secret):
1230
# XXX handle session exception
1231
sent = session.send(client.secret[sent_size:])
1232
logger.debug(u"Sent: %d, remaining: %d",
1233
sent, len(client.secret)
1234
- (sent_size + sent))
1235
sent_size += sent
1236
1237
logger.info(u"Sending secret to %s", client.name)
1238
# bump the timeout as if seen
1239
client.checked_ok()
1240
if self.server.use_dbus:
1241
# Emit D-Bus signal
1242
client.GotSecret()
1243
1244
finally:
1245
if approval_required:
1246
client.approvals_pending -= 1
1247
session.bye()
1248
1249
@staticmethod
1250
def peer_certificate(session):
1251
"Return the peer's OpenPGP certificate as a bytestring"
1252
# If not an OpenPGP certificate...
1253
if (gnutls.library.functions
1254
.gnutls_certificate_type_get(session._c_object)
1255
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1256
# ...do the normal thing
1257
return session.peer_certificate
1258
list_size = ctypes.c_uint(1)
1259
cert_list = (gnutls.library.functions
1260
.gnutls_certificate_get_peers
1261
(session._c_object, ctypes.byref(list_size)))
1262
if not bool(cert_list) and list_size.value != 0:
1263
raise gnutls.errors.GNUTLSError(u"error getting peer"
1264
u" certificate")
1265
if list_size.value == 0:
1266
return None
1267
cert = cert_list[0]
1268
return ctypes.string_at(cert.data, cert.size)
1269
1270
@staticmethod
1271
def fingerprint(openpgp):
1272
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1273
# New GnuTLS "datum" with the OpenPGP public key
1274
datum = (gnutls.library.types
1275
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1276
ctypes.POINTER
1277
(ctypes.c_ubyte)),
1278
ctypes.c_uint(len(openpgp))))
1279
# New empty GnuTLS certificate
1280
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1281
(gnutls.library.functions
1282
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1283
# Import the OpenPGP public key into the certificate
1284
(gnutls.library.functions
1285
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1286
gnutls.library.constants
1287
.GNUTLS_OPENPGP_FMT_RAW))
1288
# Verify the self signature in the key
1289
crtverify = ctypes.c_uint()
1290
(gnutls.library.functions
1291
.gnutls_openpgp_crt_verify_self(crt, 0,
1292
ctypes.byref(crtverify)))
1293
if crtverify.value != 0:
1294
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1295
raise (gnutls.errors.CertificateSecurityError
1296
(u"Verify failed"))
1297
# New buffer for the fingerprint
1298
buf = ctypes.create_string_buffer(20)
1299
buf_len = ctypes.c_size_t()
1300
# Get the fingerprint from the certificate into the buffer
1301
(gnutls.library.functions
1302
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1303
ctypes.byref(buf_len)))
1304
# Deinit the certificate
1305
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1306
# Convert the buffer to a Python bytestring
1307
fpr = ctypes.string_at(buf, buf_len.value)
1308
# Convert the bytestring to hexadecimal notation
1309
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1310
return hex_fpr
1311
1312
1313
class MultiprocessingMixIn(object):
1314
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1315
def sub_process_main(self, request, address):
1316
try:
1317
self.finish_request(request, address)
1318
except:
1319
self.handle_error(request, address)
1320
self.close_request(request)
1321
1322
def process_request(self, request, address):
1323
"""Start a new process to process the request."""
1324
multiprocessing.Process(target = self.sub_process_main,
1325
args = (request, address)).start()
1326
1327
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1328
""" adds a pipe to the MixIn """
1329
def process_request(self, request, client_address):
1330
"""Overrides and wraps the original process_request().
1331
1332
This function creates a new pipe in self.pipe
1333
"""
1334
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1335
1336
super(MultiprocessingMixInWithPipe,
1337
self).process_request(request, client_address)
1338
self.add_pipe(parent_pipe)
1339
def add_pipe(self, parent_pipe):
1340
"""Dummy function; override as necessary"""
1341
pass
1342
1343
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1344
socketserver.TCPServer, object):
1345
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1346
449
logger.info(u"TCP connection from: %s",
450
unicode(self.client_address))
451
session = gnutls.connection.ClientSession\
452
(self.request, gnutls.connection.X509Credentials())
453
454
line = self.request.makefile().readline()
455
logger.debug(u"Protocol version: %r", line)
456
try:
457
if int(line.strip().split()[0]) > 1:
458
raise RuntimeError
459
except (ValueError, IndexError, RuntimeError), error:
460
logger.error(u"Unknown protocol version: %s", error)
461
return
462
463
# Note: gnutls.connection.X509Credentials is really a generic
464
# GnuTLS certificate credentials object so long as no X.509
465
# keys are added to it. Therefore, we can use it here despite
466
# using OpenPGP certificates.
467
468
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
469
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
470
# "+DHE-DSS"))
471
priority = "NORMAL" # Fallback default, since this
472
# MUST be set.
473
if self.server.settings["priority"]:
474
priority = self.server.settings["priority"]
475
gnutls.library.functions.gnutls_priority_set_direct\
476
(session._c_object, priority, None)
477
478
try:
479
session.handshake()
480
except gnutls.errors.GNUTLSError, error:
481
logger.warning(u"Handshake failed: %s", error)
482
# Do not run session.bye() here: the session is not
483
# established. Just abandon the request.
484
return
485
try:
486
fpr = fingerprint(peer_certificate(session))
487
except (TypeError, gnutls.errors.GNUTLSError), error:
488
logger.warning(u"Bad certificate: %s", error)
489
session.bye()
490
return
491
logger.debug(u"Fingerprint: %s", fpr)
492
client = None
493
for c in self.server.clients:
494
if c.fingerprint == fpr:
495
client = c
496
break
497
if not client:
498
logger.warning(u"Client not found for fingerprint: %s",
499
fpr)
500
session.bye()
501
return
502
# Have to check if client.still_valid(), since it is possible
503
# that the client timed out while establishing the GnuTLS
504
# session.
505
if not client.still_valid():
506
logger.warning(u"Client %(name)s is invalid",
507
vars(client))
508
session.bye()
509
return
510
sent_size = 0
511
while sent_size < len(client.secret):
512
sent = session.send(client.secret[sent_size:])
513
logger.debug(u"Sent: %d, remaining: %d",
514
sent, len(client.secret)
515
- (sent_size + sent))
516
sent_size += sent
517
session.bye()
518
519
520
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
521
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1347
522
Attributes:
523
settings: Server settings
524
clients: Set() of Client objects
1348
525
enabled: Boolean; whether this server is activated yet
1349
interface: None or a network interface name (string)
1350
use_ipv6: Boolean; to use IPv6 or not
1351
526
"""
1352
def __init__(self, server_address, RequestHandlerClass,
1353
interface=None, use_ipv6=True):
1354
self.interface = interface
1355
if use_ipv6:
1356
self.address_family = socket.AF_INET6
1357
socketserver.TCPServer.__init__(self, server_address,
1358
RequestHandlerClass)
527
address_family = socket.AF_INET6
528
def __init__(self, *args, **kwargs):
529
if "settings" in kwargs:
530
self.settings = kwargs["settings"]
531
del kwargs["settings"]
532
if "clients" in kwargs:
533
self.clients = kwargs["clients"]
534
del kwargs["clients"]
535
self.enabled = False
536
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1359
537
def server_bind(self):
1360
538
"""This overrides the normal server_bind() function
1361
539
to bind to an interface if one was specified, and also NOT to
1362
540
bind to an address or port if they were not specified."""
1363
if self.interface is not None:
1364
if SO_BINDTODEVICE is None:
1365
logger.error(u"SO_BINDTODEVICE does not exist;"
1366
u" cannot bind to interface %s",
1367
self.interface)
1368
else:
1369
try:
1370
self.socket.setsockopt(socket.SOL_SOCKET,
1371
SO_BINDTODEVICE,
1372
str(self.interface
1373
+ u'\0'))
1374
except socket.error, error:
1375
if error[0] == errno.EPERM:
1376
logger.error(u"No permission to"
1377
u" bind to interface %s",
1378
self.interface)
1379
elif error[0] == errno.ENOPROTOOPT:
1380
logger.error(u"SO_BINDTODEVICE not available;"
1381
u" cannot bind to interface %s",
1382
self.interface)
1383
else:
1384
raise
541
if self.settings["interface"]:
542
# 25 is from /usr/include/asm-i486/socket.h
543
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
544
try:
545
self.socket.setsockopt(socket.SOL_SOCKET,
546
SO_BINDTODEVICE,
547
self.settings["interface"])
548
except socket.error, error:
549
if error[0] == errno.EPERM:
550
logger.error(u"No permission to"
551
u" bind to interface %s",
552
self.settings["interface"])
553
else:
554
raise error
1385
555
# Only bind(2) the socket if we really need to.
1386
556
if self.server_address[0] or self.server_address[1]:
1387
557
if not self.server_address[0]:
1388
if self.address_family == socket.AF_INET6:
1389
any_address = u"::" # in6addr_any
1390
else:
1391
any_address = socket.INADDR_ANY
1392
self.server_address = (any_address,
558
in6addr_any = "::"
559
self.server_address = (in6addr_any,
1393
560
self.server_address[1])
1394
561
elif not self.server_address[1]:
1395
562
self.server_address = (self.server_address[0],
1396
563
0)
1397
# if self.interface:
564
# if self.settings["interface"]:
1398
565
# self.server_address = (self.server_address[0],
1399
566
# 0, # port
1400
567
# 0, # flowinfo
1401
568
# if_nametoindex
1402
# (self.interface))
1403
return socketserver.TCPServer.server_bind(self)
1404
1405
1406
class MandosServer(IPv6_TCPServer):
1407
"""Mandos server.
1408
1409
Attributes:
1410
clients: set of Client objects
1411
gnutls_priority GnuTLS priority string
1412
use_dbus: Boolean; to emit D-Bus signals or not
1413
1414
Assumes a gobject.MainLoop event loop.
1415
"""
1416
def __init__(self, server_address, RequestHandlerClass,
1417
interface=None, use_ipv6=True, clients=None,
1418
gnutls_priority=None, use_dbus=True):
1419
self.enabled = False
1420
self.clients = clients
1421
if self.clients is None:
1422
self.clients = set()
1423
self.use_dbus = use_dbus
1424
self.gnutls_priority = gnutls_priority
1425
IPv6_TCPServer.__init__(self, server_address,
1426
RequestHandlerClass,
1427
interface = interface,
1428
use_ipv6 = use_ipv6)
569
# (self.settings
570
# ["interface"]))
571
return super(IPv6_TCPServer, self).server_bind()
1429
572
def server_activate(self):
1430
573
if self.enabled:
1431
return socketserver.TCPServer.server_activate(self)
574
return super(IPv6_TCPServer, self).server_activate()
1432
575
def enable(self):
1433
576
self.enabled = True
1434
def add_pipe(self, parent_pipe):
1435
# Call "handle_ipc" for both data and EOF events
1436
gobject.io_add_watch(parent_pipe.fileno(),
1437
gobject.IO_IN | gobject.IO_HUP,
1438
functools.partial(self.handle_ipc,
1439
parent_pipe = parent_pipe))
1440
1441
def handle_ipc(self, source, condition, parent_pipe=None,
1442
client_object=None):
1443
condition_names = {
1444
gobject.IO_IN: u"IN", # There is data to read.
1445
gobject.IO_OUT: u"OUT", # Data can be written (without
1446
# blocking).
1447
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1448
gobject.IO_ERR: u"ERR", # Error condition.
1449
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1450
# broken, usually for pipes and
1451
# sockets).
1452
}
1453
conditions_string = ' | '.join(name
1454
for cond, name in
1455
condition_names.iteritems()
1456
if cond & condition)
1457
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1458
conditions_string)
1459
1460
# Read a request from the child
1461
request = parent_pipe.recv()
1462
command = request[0]
1463
1464
if command == 'init':
1465
fpr = request[1]
1466
address = request[2]
1467
1468
for c in self.clients:
1469
if c.fingerprint == fpr:
1470
client = c
1471
break
1472
else:
1473
logger.warning(u"Client not found for fingerprint: %s, ad"
1474
u"dress: %s", fpr, address)
1475
if self.use_dbus:
1476
# Emit D-Bus signal
1477
mandos_dbus_service.ClientNotFound(fpr, address)
1478
parent_pipe.send(False)
1479
return False
1480
1481
gobject.io_add_watch(parent_pipe.fileno(),
1482
gobject.IO_IN | gobject.IO_HUP,
1483
functools.partial(self.handle_ipc,
1484
parent_pipe = parent_pipe,
1485
client_object = client))
1486
parent_pipe.send(True)
1487
# remove the old hook in favor of the new above hook on same fileno
1488
return False
1489
if command == 'funcall':
1490
funcname = request[1]
1491
args = request[2]
1492
kwargs = request[3]
1493
1494
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1495
1496
if command == 'getattr':
1497
attrname = request[1]
1498
if callable(client_object.__getattribute__(attrname)):
1499
parent_pipe.send(('function',))
1500
else:
1501
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1502
1503
if command == 'setattr':
1504
attrname = request[1]
1505
value = request[2]
1506
setattr(client_object, attrname, value)
1507
1508
return True
1509
577
1510
578
1511
579
def string_to_delta(interval):
1512
580
"""Parse a string and return a datetime.timedelta
1513
1514
>>> string_to_delta(u'7d')
581
582
>>> string_to_delta('7d')
1515
583
datetime.timedelta(7)
1516
>>> string_to_delta(u'60s')
584
>>> string_to_delta('60s')
1517
585
datetime.timedelta(0, 60)
1518
>>> string_to_delta(u'60m')
586
>>> string_to_delta('60m')
1519
587
datetime.timedelta(0, 3600)
1520
>>> string_to_delta(u'24h')
588
>>> string_to_delta('24h')
1521
589
datetime.timedelta(1)
1522
590
>>> string_to_delta(u'1w')
1523
591
datetime.timedelta(7)
1524
>>> string_to_delta(u'5m 30s')
592
>>> string_to_delta('5m 30s')
1525
593
datetime.timedelta(0, 330)
1526
594
"""
1527
595
timevalue = datetime.timedelta(0)
1540
608
elif suffix == u"w":
1541
609
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1542
610
else:
1543
raise ValueError(u"Unknown suffix %r" % suffix)
1544
except (ValueError, IndexError), e:
1545
raise ValueError(e.message)
611
raise ValueError
612
except (ValueError, IndexError):
613
raise ValueError
1546
614
timevalue += delta
1547
615
return timevalue
1548
616
1549
617
618
def server_state_changed(state):
619
"""Derived from the Avahi example code"""
620
if state == avahi.SERVER_COLLISION:
621
logger.error(u"Zeroconf server name collision")
622
service.remove()
623
elif state == avahi.SERVER_RUNNING:
624
service.add()
625
626
627
def entry_group_state_changed(state, error):
628
"""Derived from the Avahi example code"""
629
logger.debug(u"Avahi state change: %i", state)
630
631
if state == avahi.ENTRY_GROUP_ESTABLISHED:
632
logger.debug(u"Zeroconf service established.")
633
elif state == avahi.ENTRY_GROUP_COLLISION:
634
logger.warning(u"Zeroconf service name collision.")
635
service.rename()
636
elif state == avahi.ENTRY_GROUP_FAILURE:
637
logger.critical(u"Avahi: Error in group state changed %s",
638
unicode(error))
639
raise AvahiGroupError("State changed: %s", str(error))
640
1550
641
def if_nametoindex(interface):
1551
"""Call the C function if_nametoindex(), or equivalent
1552
1553
Note: This function cannot accept a unicode string."""
642
"""Call the C function if_nametoindex(), or equivalent"""
1554
643
global if_nametoindex
1555
644
try:
1556
if_nametoindex = (ctypes.cdll.LoadLibrary
1557
(ctypes.util.find_library(u"c"))
1558
.if_nametoindex)
645
if_nametoindex = ctypes.cdll.LoadLibrary\
646
(ctypes.util.find_library("c")).if_nametoindex
1559
647
except (OSError, AttributeError):
1560
logger.warning(u"Doing if_nametoindex the hard way")
648
if "struct" not in sys.modules:
649
import struct
650
if "fcntl" not in sys.modules:
651
import fcntl
1561
652
def if_nametoindex(interface):
1562
653
"Get an interface index the hard way, i.e. using fcntl()"
1563
654
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1564
with contextlib.closing(socket.socket()) as s:
1565
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1566
struct.pack(str(u"16s16x"),
1567
interface))
1568
interface_index = struct.unpack(str(u"I"),
1569
ifreq[16:20])[0]
655
s = socket.socket()
656
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
657
struct.pack("16s16x", interface))
658
s.close()
659
interface_index = struct.unpack("I", ifreq[16:20])[0]
1570
660
return interface_index
1571
661
return if_nametoindex(interface)
1572
662
1573
663
1574
664
def daemon(nochdir = False, noclose = False):
1575
665
"""See daemon(3). Standard BSD Unix function.
1576
1577
666
This should really exist as os.daemon, but it doesn't (yet)."""
1578
667
if os.fork():
1579
668
sys.exit()
1580
669
os.setsid()
1581
670
if not nochdir:
1582
os.chdir(u"/")
671
os.chdir("/")
1583
672
if os.fork():
1584
673
sys.exit()
1585
674
if not noclose:
1587
676
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1588
677
if not stat.S_ISCHR(os.fstat(null).st_mode):
1589
678
raise OSError(errno.ENODEV,
1590
u"%s not a character device"
1591
% os.path.devnull)
679
"/dev/null not a character device")
1592
680
os.dup2(null, sys.stdin.fileno())
1593
681
os.dup2(null, sys.stdout.fileno())
1594
682
os.dup2(null, sys.stderr.fileno())
1597
685
1598
686
1599
687
def main():
1600
1601
##################################################################
1602
# Parsing of options, both command line and config file
1603
1604
parser = optparse.OptionParser(version = "%%prog %s" % version)
1605
parser.add_option("-i", u"--interface", type=u"string",
1606
metavar="IF", help=u"Bind to interface IF")
1607
parser.add_option("-a", u"--address", type=u"string",
1608
help=u"Address to listen for requests on")
1609
parser.add_option("-p", u"--port", type=u"int",
1610
help=u"Port number to receive requests on")
1611
parser.add_option("--check", action=u"store_true",
1612
help=u"Run self-test")
1613
parser.add_option("--debug", action=u"store_true",
1614
help=u"Debug mode; run in foreground and log to"
1615
u" terminal")
1616
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1617
u" priority string (see GnuTLS documentation)")
1618
parser.add_option("--servicename", type=u"string",
1619
metavar=u"NAME", help=u"Zeroconf service name")
1620
parser.add_option("--configdir", type=u"string",
1621
default=u"/etc/mandos", metavar=u"DIR",
1622
help=u"Directory to search for configuration"
1623
u" files")
1624
parser.add_option("--no-dbus", action=u"store_false",
1625
dest=u"use_dbus", help=u"Do not provide D-Bus"
1626
u" system bus interface")
1627
parser.add_option("--no-ipv6", action=u"store_false",
1628
dest=u"use_ipv6", help=u"Do not use IPv6")
688
parser = OptionParser(version = "%%prog %s" % version)
689
parser.add_option("-i", "--interface", type="string",
690
metavar="IF", help="Bind to interface IF")
691
parser.add_option("-a", "--address", type="string",
692
help="Address to listen for requests on")
693
parser.add_option("-p", "--port", type="int",
694
help="Port number to receive requests on")
695
parser.add_option("--check", action="store_true", default=False,
696
help="Run self-test")
697
parser.add_option("--debug", action="store_true",
698
help="Debug mode; run in foreground and log to"
699
" terminal")
700
parser.add_option("--priority", type="string", help="GnuTLS"
701
" priority string (see GnuTLS documentation)")
702
parser.add_option("--servicename", type="string", metavar="NAME",
703
help="Zeroconf service name")
704
parser.add_option("--configdir", type="string",
705
default="/etc/mandos", metavar="DIR",
706
help="Directory to search for configuration"
707
" files")
1629
708
options = parser.parse_args()[0]
1630
709
1631
710
if options.check:
1634
713
sys.exit()
1635
714
1636
715
# Default values for config file for server-global settings
1637
server_defaults = { u"interface": u"",
1638
u"address": u"",
1639
u"port": u"",
1640
u"debug": u"False",
1641
u"priority":
1642
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1643
u"servicename": u"Mandos",
1644
u"use_dbus": u"True",
1645
u"use_ipv6": u"True",
716
server_defaults = { "interface": "",
717
"address": "",
718
"port": "",
719
"debug": "False",
720
"priority":
721
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
722
"servicename": "Mandos",
1646
723
}
1647
724
1648
725
# Parse config file for server-global settings
1649
server_config = configparser.SafeConfigParser(server_defaults)
726
server_config = ConfigParser.SafeConfigParser(server_defaults)
1650
727
del server_defaults
1651
server_config.read(os.path.join(options.configdir,
1652
u"mandos.conf"))
728
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1653
729
# Convert the SafeConfigParser object to a dict
1654
730
server_settings = server_config.defaults()
1655
# Use the appropriate methods on the non-string config options
1656
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1657
server_settings[option] = server_config.getboolean(u"DEFAULT",
1658
option)
1659
if server_settings["port"]:
1660
server_settings["port"] = server_config.getint(u"DEFAULT",
1661
u"port")
731
# Use getboolean on the boolean config option
732
server_settings["debug"] = server_config.getboolean\
733
("DEFAULT", "debug")
1662
734
del server_config
1663
735
1664
736
# Override the settings from the config file with command line
1665
737
# options, if set.
1666
for option in (u"interface", u"address", u"port", u"debug",
1667
u"priority", u"servicename", u"configdir",
1668
u"use_dbus", u"use_ipv6"):
738
for option in ("interface", "address", "port", "debug",
739
"priority", "servicename", "configdir"):
1669
740
value = getattr(options, option)
1670
741
if value is not None:
1671
742
server_settings[option] = value
1672
743
del options
1673
# Force all strings to be unicode
1674
for option in server_settings.keys():
1675
if type(server_settings[option]) is str:
1676
server_settings[option] = unicode(server_settings[option])
1677
744
# Now we have our good server settings in "server_settings"
1678
745
1679
##################################################################
1680
1681
# For convenience
1682
debug = server_settings[u"debug"]
1683
use_dbus = server_settings[u"use_dbus"]
1684
use_ipv6 = server_settings[u"use_ipv6"]
746
debug = server_settings["debug"]
1685
747
1686
748
if not debug:
1687
749
syslogger.setLevel(logging.WARNING)
1688
750
console.setLevel(logging.WARNING)
1689
751
1690
if server_settings[u"servicename"] != u"Mandos":
1691
syslogger.setFormatter(logging.Formatter
1692
(u'Mandos (%s) [%%(process)d]:'
1693
u' %%(levelname)s: %%(message)s'
1694
% server_settings[u"servicename"]))
752
if server_settings["servicename"] != "Mandos":
753
syslogger.setFormatter(logging.Formatter\
754
('Mandos (%s): %%(levelname)s:'
755
' %%(message)s'
756
% server_settings["servicename"]))
1695
757
1696
758
# Parse config file with clients
1697
client_defaults = { u"timeout": u"1h",
1698
u"interval": u"5m",
1699
u"checker": u"fping -q -- %%(host)s",
1700
u"host": u"",
1701
u"approved_delay": u"0s",
1702
u"approved_duration": u"1s",
759
client_defaults = { "timeout": "1h",
760
"interval": "5m",
761
"checker": "fping -q -- %(host)s",
762
"host": "",
1703
763
}
1704
client_config = configparser.SafeConfigParser(client_defaults)
1705
client_config.read(os.path.join(server_settings[u"configdir"],
1706
u"clients.conf"))
1707
1708
global mandos_dbus_service
1709
mandos_dbus_service = None
1710
1711
tcp_server = MandosServer((server_settings[u"address"],
1712
server_settings[u"port"]),
1713
ClientHandler,
1714
interface=server_settings[u"interface"],
1715
use_ipv6=use_ipv6,
1716
gnutls_priority=
1717
server_settings[u"priority"],
1718
use_dbus=use_dbus)
1719
pidfilename = u"/var/run/mandos.pid"
1720
try:
1721
pidfile = open(pidfilename, u"w")
1722
except IOError:
1723
logger.error(u"Could not open file %r", pidfilename)
1724
1725
try:
1726
uid = pwd.getpwnam(u"_mandos").pw_uid
1727
gid = pwd.getpwnam(u"_mandos").pw_gid
1728
except KeyError:
1729
try:
1730
uid = pwd.getpwnam(u"mandos").pw_uid
1731
gid = pwd.getpwnam(u"mandos").pw_gid
1732
except KeyError:
1733
try:
1734
uid = pwd.getpwnam(u"nobody").pw_uid
1735
gid = pwd.getpwnam(u"nobody").pw_gid
1736
except KeyError:
1737
uid = 65534
1738
gid = 65534
1739
try:
764
client_config = ConfigParser.SafeConfigParser(client_defaults)
765
client_config.read(os.path.join(server_settings["configdir"],
766
"clients.conf"))
767
768
clients = Set()
769
tcp_server = IPv6_TCPServer((server_settings["address"],
770
server_settings["port"]),
771
TCP_handler,
772
settings=server_settings,
773
clients=clients)
774
pidfilename = "/var/run/mandos.pid"
775
try:
776
pidfile = open(pidfilename, "w")
777
except IOError, error:
778
logger.error("Could not open file %r", pidfilename)
779
780
uid = 65534
781
gid = 65534
782
try:
783
uid = pwd.getpwnam("mandos").pw_uid
784
except KeyError:
785
try:
786
uid = pwd.getpwnam("nobody").pw_uid
787
except KeyError:
788
pass
789
try:
790
gid = pwd.getpwnam("mandos").pw_gid
791
except KeyError:
792
try:
793
gid = pwd.getpwnam("nogroup").pw_gid
794
except KeyError:
795
pass
796
try:
797
os.setuid(uid)
1740
798
os.setgid(gid)
1741
os.setuid(uid)
1742
799
except OSError, error:
1743
800
if error[0] != errno.EPERM:
1744
801
raise error
1745
802
1746
# Enable all possible GnuTLS debugging
1747
if debug:
1748
# "Use a log level over 10 to enable all debugging options."
1749
# - GnuTLS manual
1750
gnutls.library.functions.gnutls_global_set_log_level(11)
1751
1752
@gnutls.library.types.gnutls_log_func
1753
def debug_gnutls(level, string):
1754
logger.debug(u"GnuTLS: %s", string[:-1])
1755
1756
(gnutls.library.functions
1757
.gnutls_global_set_log_function(debug_gnutls))
803
global service
804
service = AvahiService(name = server_settings["servicename"],
805
servicetype = "_mandos._tcp", )
806
if server_settings["interface"]:
807
service.interface = if_nametoindex\
808
(server_settings["interface"])
1758
809
1759
810
global main_loop
811
global bus
812
global server
1760
813
# From the Avahi example code
1761
814
DBusGMainLoop(set_as_default=True )
1762
815
main_loop = gobject.MainLoop()
1763
816
bus = dbus.SystemBus()
817
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
818
avahi.DBUS_PATH_SERVER),
819
avahi.DBUS_INTERFACE_SERVER)
1764
820
# End of Avahi example code
1765
if use_dbus:
1766
try:
1767
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1768
bus, do_not_queue=True)
1769
except dbus.exceptions.NameExistsException, e:
1770
logger.error(unicode(e) + u", disabling D-Bus")
1771
use_dbus = False
1772
server_settings[u"use_dbus"] = False
1773
tcp_server.use_dbus = False
1774
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1775
service = AvahiService(name = server_settings[u"servicename"],
1776
servicetype = u"_mandos._tcp",
1777
protocol = protocol, bus = bus)
1778
if server_settings["interface"]:
1779
service.interface = (if_nametoindex
1780
(str(server_settings[u"interface"])))
1781
1782
client_class = Client
1783
if use_dbus:
1784
client_class = functools.partial(ClientDBus, bus = bus)
1785
def client_config_items(config, section):
1786
special_settings = {
1787
"approved_by_default":
1788
lambda: config.getboolean(section,
1789
"approved_by_default"),
1790
}
1791
for name, value in config.items(section):
1792
try:
1793
yield (name, special_settings[name]())
1794
except KeyError:
1795
yield (name, value)
1796
1797
tcp_server.clients.update(set(
1798
client_class(name = section,
1799
config= dict(client_config_items(
1800
client_config, section)))
1801
for section in client_config.sections()))
1802
if not tcp_server.clients:
1803
logger.warning(u"No clients defined")
821
822
def remove_from_clients(client):
823
clients.remove(client)
824
if not clients:
825
logger.critical(u"No clients left, exiting")
826
sys.exit()
827
828
clients.update(Set(Client(name = section,
829
stop_hook = remove_from_clients,
830
config
831
= dict(client_config.items(section)))
832
for section in client_config.sections()))
833
if not clients:
834
logger.critical(u"No clients defined")
835
sys.exit(1)
1804
836
1805
837
if debug:
1806
838
# Redirect stdin so all checkers get /dev/null
1815
847
daemon()
1816
848
1817
849
try:
1818
with pidfile:
1819
pid = os.getpid()
1820
pidfile.write(str(pid) + "\n")
850
pid = os.getpid()
851
pidfile.write(str(pid) + "\n")
852
pidfile.close()
1821
853
del pidfile
1822
854
except IOError:
1823
855
logger.error(u"Could not write to file %r with PID %d",
1827
859
pass
1828
860
del pidfilename
1829
861
862
def cleanup():
863
"Cleanup function; run on exit"
864
global group
865
# From the Avahi example code
866
if not group is None:
867
group.Free()
868
group = None
869
# End of Avahi example code
870
871
while clients:
872
client = clients.pop()
873
client.stop_hook = None
874
client.stop()
875
876
atexit.register(cleanup)
877
1830
878
if not debug:
1831
879
signal.signal(signal.SIGINT, signal.SIG_IGN)
1832
880
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1833
881
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1834
882
1835
if use_dbus:
1836
class MandosDBusService(dbus.service.Object):
1837
"""A D-Bus proxy object"""
1838
def __init__(self):
1839
dbus.service.Object.__init__(self, bus, u"/")
1840
_interface = u"se.bsnet.fukt.Mandos"
1841
1842
@dbus.service.signal(_interface, signature=u"o")
1843
def ClientAdded(self, objpath):
1844
"D-Bus signal"
1845
pass
1846
1847
@dbus.service.signal(_interface, signature=u"ss")
1848
def ClientNotFound(self, fingerprint, address):
1849
"D-Bus signal"
1850
pass
1851
1852
@dbus.service.signal(_interface, signature=u"os")
1853
def ClientRemoved(self, objpath, name):
1854
"D-Bus signal"
1855
pass
1856
1857
@dbus.service.method(_interface, out_signature=u"ao")
1858
def GetAllClients(self):
1859
"D-Bus method"
1860
return dbus.Array(c.dbus_object_path
1861
for c in tcp_server.clients)
1862
1863
@dbus.service.method(_interface,
1864
out_signature=u"a{oa{sv}}")
1865
def GetAllClientsWithProperties(self):
1866
"D-Bus method"
1867
return dbus.Dictionary(
1868
((c.dbus_object_path, c.GetAll(u""))
1869
for c in tcp_server.clients),
1870
signature=u"oa{sv}")
1871
1872
@dbus.service.method(_interface, in_signature=u"o")
1873
def RemoveClient(self, object_path):
1874
"D-Bus method"
1875
for c in tcp_server.clients:
1876
if c.dbus_object_path == object_path:
1877
tcp_server.clients.remove(c)
1878
c.remove_from_connection()
1879
# Don't signal anything except ClientRemoved
1880
c.disable(quiet=True)
1881
# Emit D-Bus signal
1882
self.ClientRemoved(object_path, c.name)
1883
return
1884
raise KeyError(object_path)
1885
1886
del _interface
1887
1888
mandos_dbus_service = MandosDBusService()
1889
1890
def cleanup():
1891
"Cleanup function; run on exit"
1892
service.cleanup()
1893
1894
while tcp_server.clients:
1895
client = tcp_server.clients.pop()
1896
if use_dbus:
1897
client.remove_from_connection()
1898
client.disable_hook = None
1899
# Don't signal anything except ClientRemoved
1900
client.disable(quiet=True)
1901
if use_dbus:
1902
# Emit D-Bus signal
1903
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1904
client.name)
1905
1906
atexit.register(cleanup)
1907
1908
for client in tcp_server.clients:
1909
if use_dbus:
1910
# Emit D-Bus signal
1911
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1912
client.enable()
883
for client in clients:
884
client.start()
1913
885
1914
886
tcp_server.enable()
1915
887
tcp_server.server_activate()
1916
888
1917
889
# Find out what port we got
1918
890
service.port = tcp_server.socket.getsockname()[1]
1919
if use_ipv6:
1920
logger.info(u"Now listening on address %r, port %d,"
1921
" flowinfo %d, scope_id %d"
1922
% tcp_server.socket.getsockname())
1923
else: # IPv4
1924
logger.info(u"Now listening on address %r, port %d"
1925
% tcp_server.socket.getsockname())
891
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
892
u" scope_id %d" % tcp_server.socket.getsockname())
1926
893
1927
894
#service.interface = tcp_server.socket.getsockname()[3]
1928
895
1929
896
try:
1930
897
# From the Avahi example code
898
server.connect_to_signal("StateChanged", server_state_changed)
1931
899
try:
1932
service.activate()
900
server_state_changed(server.GetState())
1933
901
except dbus.exceptions.DBusException, error:
1934
902
logger.critical(u"DBusException: %s", error)
1935
cleanup()
1936
903
sys.exit(1)
1937
904
# End of Avahi example code
1938
905
1939
906
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1940
907
lambda *args, **kwargs:
1941
(tcp_server.handle_request
1942
(*args[2:], **kwargs) or True))
908
tcp_server.handle_request\
909
(*args[2:], **kwargs) or True)
1943
910
1944
911
logger.debug(u"Starting main loop")
1945
912
main_loop.run()
1946
913
except AvahiError, error:
1947
logger.critical(u"AvahiError: %s", error)
1948
cleanup()
914
logger.critical(u"AvahiError: %s" + unicode(error))
1949
915
sys.exit(1)
1950
916
except KeyboardInterrupt:
1951
917
if debug:
1952
print >> sys.stderr
1953
logger.debug(u"Server received KeyboardInterrupt")
1954
logger.debug(u"Server exiting")
1955
# Must run before the D-Bus bus name gets deregistered
1956
cleanup()
918
print
1957
919
1958
920
if __name__ == '__main__':
1959
921
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0