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- Committer: Teddy Hogeborn
- Date: 2010-09-12 03:00:40 UTC
- Revision ID: teddy@fukt.bsnet.se-20100912030040-b0uopyennste9fdh
Documentation changes:
* DBUS-API: New file documenting the server D-Bus interface.
* clients.conf: Add examples of new approval settings.
* debian/mandos.docs: Added "DBUS-API".
* mandos-clients.conf.xml (OPTIONS): Added "approved_by_default",
"approval_delay", and
"approval_duration".
* mandos.xml (D-BUS INTERFACE): Refer to the "DBUS-API" file.
(BUGS): Remove mention of lack of a remote query interface.
* DBUS-API: New file documenting the server D-Bus interface.
* clients.conf: Add examples of new approval settings.
* debian/mandos.docs: Added "DBUS-API".
* mandos-clients.conf.xml (OPTIONS): Added "approved_by_default",
"approval_delay", and
"approval_duration".
* mandos.xml (D-BUS INTERFACE): Refer to the "DBUS-API" file.
(BUGS): Remove mention of lack of a remote query interface.
- files added:
- DBUS-API
- files removed:
- debian/mandos-client.config
- files modified:
- .bzrignore
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008 Teddy Hogeborn & Björn Påhlsson
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
15
16
#
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# This program is free software: you can redistribute it and/or modify
17
18
# it under the terms of the GNU General Public License as published by
30
31
# Contact the authors at <mandos@fukt.bsnet.se>.
31
32
#
32
33
33
from __future__ import division
34
from __future__ import division, with_statement, absolute_import
34
35
35
import SocketServer
36
import SocketServer as socketserver
36
37
import socket
37
from optparse import OptionParser
38
import optparse
38
39
import datetime
39
40
import errno
40
41
import gnutls.crypto
43
44
import gnutls.library.functions
44
45
import gnutls.library.constants
45
46
import gnutls.library.types
46
import ConfigParser
47
import ConfigParser as configparser
47
48
import sys
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49
import re
49
50
import os
50
51
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
58
64
59
65
import dbus
66
import dbus.service
60
67
import gobject
61
68
import avahi
62
69
from dbus.mainloop.glib import DBusGMainLoop
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70
import ctypes
64
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import ctypes.util
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66
version = "1.0"
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logger = logging.Logger('mandos')
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syslogger = logging.handlers.SysLogHandler\
70
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log")
72
syslogger.setFormatter(logging.Formatter\
73
('Mandos: %(levelname)s: %(message)s'))
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
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(u'Mandos [%(process)d]: %(levelname)s:'
93
u' %(message)s'))
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logger.addHandler(syslogger)
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95
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
78
' %(message)s'))
97
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
98
u' %(levelname)s:'
99
u' %(message)s'))
79
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logger.addHandler(console)
80
101
81
102
class AvahiError(Exception):
82
def __init__(self, value):
103
def __init__(self, value, *args, **kwargs):
83
104
self.value = value
84
super(AvahiError, self).__init__()
85
def __str__(self):
86
return repr(self.value)
105
super(AvahiError, self).__init__(value, *args, **kwargs)
106
def __unicode__(self):
107
return unicode(repr(self.value))
87
108
88
109
class AvahiServiceError(AvahiError):
89
110
pass
94
115
95
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class AvahiService(object):
96
117
"""An Avahi (Zeroconf) service.
118
97
119
Attributes:
98
120
interface: integer; avahi.IF_UNSPEC or an interface index.
99
121
Used to optionally bind to the specified interface.
100
name: string; Example: 'Mandos'
101
type: string; Example: '_mandos._tcp'.
122
name: string; Example: u'Mandos'
123
type: string; Example: u'_mandos._tcp'.
102
124
See <http://www.dns-sd.org/ServiceTypes.html>
103
125
port: integer; what port to announce
104
126
TXT: list of strings; TXT record for the service
107
129
max_renames: integer; maximum number of renames
108
130
rename_count: integer; counter so we only rename after collisions
109
131
a sensible number of times
132
group: D-Bus Entry Group
133
server: D-Bus Server
134
bus: dbus.SystemBus()
110
135
"""
111
136
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
112
servicetype = None, port = None, TXT = None, domain = "",
113
host = "", max_renames = 32768):
137
servicetype = None, port = None, TXT = None,
138
domain = u"", host = u"", max_renames = 32768,
139
protocol = avahi.PROTO_UNSPEC, bus = None):
114
140
self.interface = interface
115
141
self.name = name
116
142
self.type = servicetype
117
143
self.port = port
118
if TXT is None:
119
self.TXT = []
120
else:
121
self.TXT = TXT
144
self.TXT = TXT if TXT is not None else []
122
145
self.domain = domain
123
146
self.host = host
124
147
self.rename_count = 0
125
148
self.max_renames = max_renames
149
self.protocol = protocol
150
self.group = None # our entry group
151
self.server = None
152
self.bus = bus
126
153
def rename(self):
127
154
"""Derived from the Avahi example code"""
128
155
if self.rename_count >= self.max_renames:
129
156
logger.critical(u"No suitable Zeroconf service name found"
130
157
u" after %i retries, exiting.",
131
158
self.rename_count)
132
raise AvahiServiceError("Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
159
raise AvahiServiceError(u"Too many renames")
160
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
134
161
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
136
syslogger.setFormatter(logging.Formatter\
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
162
self.name)
163
syslogger.setFormatter(logging.Formatter
164
(u'Mandos (%s) [%%(process)d]:'
165
u' %%(levelname)s: %%(message)s'
166
% self.name))
139
167
self.remove()
140
self.add()
168
try:
169
self.add()
170
except dbus.exceptions.DBusException, error:
171
logger.critical(u"DBusException: %s", error)
172
self.cleanup()
173
os._exit(1)
141
174
self.rename_count += 1
142
175
def remove(self):
143
176
"""Derived from the Avahi example code"""
144
if group is not None:
145
group.Reset()
177
if self.group is not None:
178
self.group.Reset()
146
179
def add(self):
147
180
"""Derived from the Avahi example code"""
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)
181
if self.group is None:
182
self.group = dbus.Interface(
183
self.bus.get_object(avahi.DBUS_NAME,
184
self.server.EntryGroupNew()),
185
avahi.DBUS_INTERFACE_ENTRY_GROUP)
186
self.group.connect_to_signal('StateChanged',
187
self
188
.entry_group_state_changed)
156
189
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
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
190
self.name, self.type)
191
self.group.AddService(
192
self.interface,
193
self.protocol,
194
dbus.UInt32(0), # flags
195
self.name, self.type,
196
self.domain, self.host,
197
dbus.UInt16(self.port),
198
avahi.string_array_to_txt_array(self.TXT))
199
self.group.Commit()
200
def entry_group_state_changed(self, state, error):
201
"""Derived from the Avahi example code"""
202
logger.debug(u"Avahi entry group state change: %i", state)
203
204
if state == avahi.ENTRY_GROUP_ESTABLISHED:
205
logger.debug(u"Zeroconf service established.")
206
elif state == avahi.ENTRY_GROUP_COLLISION:
207
logger.warning(u"Zeroconf service name collision.")
208
self.rename()
209
elif state == avahi.ENTRY_GROUP_FAILURE:
210
logger.critical(u"Avahi: Error in group state changed %s",
211
unicode(error))
212
raise AvahiGroupError(u"State changed: %s"
213
% unicode(error))
214
def cleanup(self):
215
"""Derived from the Avahi example code"""
216
if self.group is not None:
217
self.group.Free()
218
self.group = None
219
def server_state_changed(self, state):
220
"""Derived from the Avahi example code"""
221
logger.debug(u"Avahi server state change: %i", state)
222
if state == avahi.SERVER_COLLISION:
223
logger.error(u"Zeroconf server name collision")
224
self.remove()
225
elif state == avahi.SERVER_RUNNING:
226
self.add()
227
def activate(self):
228
"""Derived from the Avahi example code"""
229
if self.server is None:
230
self.server = dbus.Interface(
231
self.bus.get_object(avahi.DBUS_NAME,
232
avahi.DBUS_PATH_SERVER),
233
avahi.DBUS_INTERFACE_SERVER)
234
self.server.connect_to_signal(u"StateChanged",
235
self.server_state_changed)
236
self.server_state_changed(self.server.GetState())
171
237
172
238
173
239
class Client(object):
174
240
"""A representation of a client host served by this server.
241
175
242
Attributes:
176
name: string; from the config file, used in log messages
243
name: string; from the config file, used in log messages and
244
D-Bus identifiers
177
245
fingerprint: string (40 or 32 hexadecimal digits); used to
178
246
uniquely identify the client
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.
247
secret: bytestring; sent verbatim (over TLS) to client
248
host: string; available for use by the checker command
249
created: datetime.datetime(); (UTC) object creation
250
last_enabled: datetime.datetime(); (UTC)
251
enabled: bool()
252
last_checked_ok: datetime.datetime(); (UTC) or None
253
timeout: datetime.timedelta(); How long from last_checked_ok
254
until this client is disabled
255
interval: datetime.timedelta(); How often to start a new checker
256
disable_hook: If set, called by disable() as disable_hook(self)
257
checker: subprocess.Popen(); a running checker process used
258
to see if the client lives.
259
'None' if no process is running.
190
260
checker_initiator_tag: a gobject event source tag, or None
191
stop_initiator_tag: - '' -
261
disable_initiator_tag: - '' -
192
262
checker_callback_tag: - '' -
193
263
checker_command: string; External command which is run to check if
194
264
client lives. %() expansions are done at
195
265
runtime with vars(self) as dict, so that for
196
266
instance %(name)s can be used in the command.
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: - '' -
267
current_checker_command: string; current running checker_command
268
approval_delay: datetime.timedelta(); Time to wait for approval
269
_approved: bool(); 'None' if not yet approved/disapproved
270
approval_duration: datetime.timedelta(); Duration of one approval
202
271
"""
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):
272
273
@staticmethod
274
def _timedelta_to_milliseconds(td):
275
"Convert a datetime.timedelta() to milliseconds"
276
return ((td.days * 24 * 60 * 60 * 1000)
277
+ (td.seconds * 1000)
278
+ (td.microseconds // 1000))
279
280
def timeout_milliseconds(self):
281
"Return the 'timeout' attribute in milliseconds"
282
return self._timedelta_to_milliseconds(self.timeout)
283
284
def interval_milliseconds(self):
285
"Return the 'interval' attribute in milliseconds"
286
return self._timedelta_to_milliseconds(self.interval)
287
288
def approval_delay_milliseconds(self):
289
return self._timedelta_to_milliseconds(self.approval_delay)
290
291
def __init__(self, name = None, disable_hook=None, config=None):
227
292
"""Note: the 'checker' key in 'config' sets the
228
293
'checker_command' attribute and *not* the 'checker'
229
294
attribute."""
295
self.name = name
230
296
if config is None:
231
297
config = {}
232
self.name = name
233
298
logger.debug(u"Creating client %r", self.name)
234
299
# Uppercase and remove spaces from fingerprint for later
235
300
# comparison purposes with return value from the fingerprint()
236
301
# function
237
self.fingerprint = config["fingerprint"].upper()\
238
.replace(u" ", u"")
302
self.fingerprint = (config[u"fingerprint"].upper()
303
.replace(u" ", u""))
239
304
logger.debug(u" Fingerprint: %s", self.fingerprint)
240
if "secret" in config:
241
self.secret = config["secret"].decode(u"base64")
242
elif "secfile" in config:
243
secfile = open(config["secfile"])
244
self.secret = secfile.read()
245
secfile.close()
305
if u"secret" in config:
306
self.secret = config[u"secret"].decode(u"base64")
307
elif u"secfile" in config:
308
with open(os.path.expanduser(os.path.expandvars
309
(config[u"secfile"])),
310
"rb") as secfile:
311
self.secret = secfile.read()
246
312
else:
247
313
raise TypeError(u"No secret or secfile for client %s"
248
314
% self.name)
249
self.host = config.get("host", "")
250
self.created = datetime.datetime.now()
315
self.host = config.get(u"host", u"")
316
self.created = datetime.datetime.utcnow()
317
self.enabled = False
318
self.last_enabled = None
251
319
self.last_checked_ok = None
252
self.timeout = string_to_delta(config["timeout"])
253
self.interval = string_to_delta(config["interval"])
254
self.stop_hook = stop_hook
320
self.timeout = string_to_delta(config[u"timeout"])
321
self.interval = string_to_delta(config[u"interval"])
322
self.disable_hook = disable_hook
255
323
self.checker = None
256
324
self.checker_initiator_tag = None
257
self.stop_initiator_tag = None
325
self.disable_initiator_tag = None
258
326
self.checker_callback_tag = None
259
self.check_command = config["checker"]
260
def start(self):
327
self.checker_command = config[u"checker"]
328
self.current_checker_command = None
329
self.last_connect = None
330
self._approved = None
331
self.approved_by_default = config.get(u"approved_by_default",
332
True)
333
self.approvals_pending = 0
334
self.approval_delay = string_to_delta(
335
config[u"approval_delay"])
336
self.approval_duration = string_to_delta(
337
config[u"approval_duration"])
338
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
339
340
def send_changedstate(self):
341
self.changedstate.acquire()
342
self.changedstate.notify_all()
343
self.changedstate.release()
344
345
def enable(self):
261
346
"""Start this client's checker and timeout hooks"""
347
if getattr(self, u"enabled", False):
348
# Already enabled
349
return
350
self.send_changedstate()
351
self.last_enabled = datetime.datetime.utcnow()
262
352
# Schedule a new checker to be started an 'interval' from now,
263
353
# and every interval from then on.
264
self.checker_initiator_tag = gobject.timeout_add\
265
(self._interval_milliseconds,
266
self.start_checker)
354
self.checker_initiator_tag = (gobject.timeout_add
355
(self.interval_milliseconds(),
356
self.start_checker))
357
# Schedule a disable() when 'timeout' has passed
358
self.disable_initiator_tag = (gobject.timeout_add
359
(self.timeout_milliseconds(),
360
self.disable))
361
self.enabled = True
267
362
# Also start a new checker *right now*.
268
363
self.start_checker()
269
# Schedule a stop() when 'timeout' has passed
270
self.stop_initiator_tag = gobject.timeout_add\
271
(self._timeout_milliseconds,
272
self.stop)
273
def stop(self):
274
"""Stop this client.
275
The possibility that a client might be restarted is left open,
276
but not currently used."""
277
# If this client doesn't have a secret, it is already stopped.
278
if hasattr(self, "secret") and self.secret:
279
logger.info(u"Stopping client %s", self.name)
280
self.secret = None
281
else:
364
365
def disable(self, quiet=True):
366
"""Disable this client."""
367
if not getattr(self, "enabled", False):
282
368
return False
283
if getattr(self, "stop_initiator_tag", False):
284
gobject.source_remove(self.stop_initiator_tag)
285
self.stop_initiator_tag = None
286
if getattr(self, "checker_initiator_tag", False):
369
if not quiet:
370
self.send_changedstate()
371
if not quiet:
372
logger.info(u"Disabling client %s", self.name)
373
if getattr(self, u"disable_initiator_tag", False):
374
gobject.source_remove(self.disable_initiator_tag)
375
self.disable_initiator_tag = None
376
if getattr(self, u"checker_initiator_tag", False):
287
377
gobject.source_remove(self.checker_initiator_tag)
288
378
self.checker_initiator_tag = None
289
379
self.stop_checker()
290
if self.stop_hook:
291
self.stop_hook(self)
380
if self.disable_hook:
381
self.disable_hook(self)
382
self.enabled = False
292
383
# Do not run this again if called by a gobject.timeout_add
293
384
return False
385
294
386
def __del__(self):
295
self.stop_hook = None
296
self.stop()
297
def checker_callback(self, pid, condition):
387
self.disable_hook = None
388
self.disable()
389
390
def checker_callback(self, pid, condition, command):
298
391
"""The checker has completed, so take appropriate actions."""
299
now = datetime.datetime.now()
300
392
self.checker_callback_tag = None
301
393
self.checker = None
302
if os.WIFEXITED(condition) \
303
and (os.WEXITSTATUS(condition) == 0):
304
logger.info(u"Checker for %(name)s succeeded",
305
vars(self))
306
self.last_checked_ok = now
307
gobject.source_remove(self.stop_initiator_tag)
308
self.stop_initiator_tag = gobject.timeout_add\
309
(self._timeout_milliseconds,
310
self.stop)
311
elif not os.WIFEXITED(condition):
394
if os.WIFEXITED(condition):
395
exitstatus = os.WEXITSTATUS(condition)
396
if exitstatus == 0:
397
logger.info(u"Checker for %(name)s succeeded",
398
vars(self))
399
self.checked_ok()
400
else:
401
logger.info(u"Checker for %(name)s failed",
402
vars(self))
403
else:
312
404
logger.warning(u"Checker for %(name)s crashed?",
313
405
vars(self))
314
else:
315
logger.info(u"Checker for %(name)s failed",
316
vars(self))
406
407
def checked_ok(self):
408
"""Bump up the timeout for this client.
409
410
This should only be called when the client has been seen,
411
alive and well.
412
"""
413
self.last_checked_ok = datetime.datetime.utcnow()
414
gobject.source_remove(self.disable_initiator_tag)
415
self.disable_initiator_tag = (gobject.timeout_add
416
(self.timeout_milliseconds(),
417
self.disable))
418
317
419
def start_checker(self):
318
420
"""Start a new checker subprocess if one is not running.
421
319
422
If a checker already exists, leave it running and do
320
423
nothing."""
321
424
# The reason for not killing a running checker is that if we
324
427
# client would inevitably timeout, since no checker would get
325
428
# a chance to run to completion. If we instead leave running
326
429
# checkers alone, the checker would have to take more time
327
# than 'timeout' for the client to be declared invalid, which
328
# is as it should be.
430
# than 'timeout' for the client to be disabled, which is as it
431
# should be.
432
433
# If a checker exists, make sure it is not a zombie
434
try:
435
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
436
except (AttributeError, OSError), error:
437
if (isinstance(error, OSError)
438
and error.errno != errno.ECHILD):
439
raise error
440
else:
441
if pid:
442
logger.warning(u"Checker was a zombie")
443
gobject.source_remove(self.checker_callback_tag)
444
self.checker_callback(pid, status,
445
self.current_checker_command)
446
# Start a new checker if needed
329
447
if self.checker is None:
330
448
try:
331
# In case check_command has exactly one % operator
332
command = self.check_command % self.host
449
# In case checker_command has exactly one % operator
450
command = self.checker_command % self.host
333
451
except TypeError:
334
452
# Escape attributes for the shell
335
escaped_attrs = dict((key, re.escape(str(val)))
453
escaped_attrs = dict((key,
454
re.escape(unicode(str(val),
455
errors=
456
u'replace')))
336
457
for key, val in
337
458
vars(self).iteritems())
338
459
try:
339
command = self.check_command % escaped_attrs
460
command = self.checker_command % escaped_attrs
340
461
except TypeError, error:
341
462
logger.error(u'Could not format string "%s":'
342
u' %s', self.check_command, error)
463
u' %s', self.checker_command, error)
343
464
return True # Try again later
465
self.current_checker_command = command
344
466
try:
345
467
logger.info(u"Starting checker %r for %s",
346
468
command, self.name)
350
472
# always replaced by /dev/null.)
351
473
self.checker = subprocess.Popen(command,
352
474
close_fds=True,
353
shell=True, cwd="/")
354
self.checker_callback_tag = gobject.child_watch_add\
355
(self.checker.pid,
356
self.checker_callback)
475
shell=True, cwd=u"/")
476
self.checker_callback_tag = (gobject.child_watch_add
477
(self.checker.pid,
478
self.checker_callback,
479
data=command))
480
# The checker may have completed before the gobject
481
# watch was added. Check for this.
482
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
483
if pid:
484
gobject.source_remove(self.checker_callback_tag)
485
self.checker_callback(pid, status, command)
357
486
except OSError, error:
358
487
logger.error(u"Failed to start subprocess: %s",
359
488
error)
360
489
# Re-run this periodically if run by gobject.timeout_add
361
490
return True
491
362
492
def stop_checker(self):
363
493
"""Force the checker process, if any, to stop."""
364
494
if self.checker_callback_tag:
365
495
gobject.source_remove(self.checker_callback_tag)
366
496
self.checker_callback_tag = None
367
if getattr(self, "checker", None) is None:
497
if getattr(self, u"checker", None) is None:
368
498
return
369
499
logger.debug(u"Stopping checker for %(name)s", vars(self))
370
500
try:
371
501
os.kill(self.checker.pid, signal.SIGTERM)
372
#os.sleep(0.5)
502
#time.sleep(0.5)
373
503
#if self.checker.poll() is None:
374
504
# os.kill(self.checker.pid, signal.SIGKILL)
375
505
except OSError, error:
376
506
if error.errno != errno.ESRCH: # No such process
377
507
raise
378
508
self.checker = None
379
def still_valid(self):
380
"""Has the timeout not yet passed for this client?"""
381
now = datetime.datetime.now()
509
510
def dbus_service_property(dbus_interface, signature=u"v",
511
access=u"readwrite", byte_arrays=False):
512
"""Decorators for marking methods of a DBusObjectWithProperties to
513
become properties on the D-Bus.
514
515
The decorated method will be called with no arguments by "Get"
516
and with one argument by "Set".
517
518
The parameters, where they are supported, are the same as
519
dbus.service.method, except there is only "signature", since the
520
type from Get() and the type sent to Set() is the same.
521
"""
522
# Encoding deeply encoded byte arrays is not supported yet by the
523
# "Set" method, so we fail early here:
524
if byte_arrays and signature != u"ay":
525
raise ValueError(u"Byte arrays not supported for non-'ay'"
526
u" signature %r" % signature)
527
def decorator(func):
528
func._dbus_is_property = True
529
func._dbus_interface = dbus_interface
530
func._dbus_signature = signature
531
func._dbus_access = access
532
func._dbus_name = func.__name__
533
if func._dbus_name.endswith(u"_dbus_property"):
534
func._dbus_name = func._dbus_name[:-14]
535
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
536
return func
537
return decorator
538
539
540
class DBusPropertyException(dbus.exceptions.DBusException):
541
"""A base class for D-Bus property-related exceptions
542
"""
543
def __unicode__(self):
544
return unicode(str(self))
545
546
547
class DBusPropertyAccessException(DBusPropertyException):
548
"""A property's access permissions disallows an operation.
549
"""
550
pass
551
552
553
class DBusPropertyNotFound(DBusPropertyException):
554
"""An attempt was made to access a non-existing property.
555
"""
556
pass
557
558
559
class DBusObjectWithProperties(dbus.service.Object):
560
"""A D-Bus object with properties.
561
562
Classes inheriting from this can use the dbus_service_property
563
decorator to expose methods as D-Bus properties. It exposes the
564
standard Get(), Set(), and GetAll() methods on the D-Bus.
565
"""
566
567
@staticmethod
568
def _is_dbus_property(obj):
569
return getattr(obj, u"_dbus_is_property", False)
570
571
def _get_all_dbus_properties(self):
572
"""Returns a generator of (name, attribute) pairs
573
"""
574
return ((prop._dbus_name, prop)
575
for name, prop in
576
inspect.getmembers(self, self._is_dbus_property))
577
578
def _get_dbus_property(self, interface_name, property_name):
579
"""Returns a bound method if one exists which is a D-Bus
580
property with the specified name and interface.
581
"""
582
for name in (property_name,
583
property_name + u"_dbus_property"):
584
prop = getattr(self, name, None)
585
if (prop is None
586
or not self._is_dbus_property(prop)
587
or prop._dbus_name != property_name
588
or (interface_name and prop._dbus_interface
589
and interface_name != prop._dbus_interface)):
590
continue
591
return prop
592
# No such property
593
raise DBusPropertyNotFound(self.dbus_object_path + u":"
594
+ interface_name + u"."
595
+ property_name)
596
597
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
598
out_signature=u"v")
599
def Get(self, interface_name, property_name):
600
"""Standard D-Bus property Get() method, see D-Bus standard.
601
"""
602
prop = self._get_dbus_property(interface_name, property_name)
603
if prop._dbus_access == u"write":
604
raise DBusPropertyAccessException(property_name)
605
value = prop()
606
if not hasattr(value, u"variant_level"):
607
return value
608
return type(value)(value, variant_level=value.variant_level+1)
609
610
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
611
def Set(self, interface_name, property_name, value):
612
"""Standard D-Bus property Set() method, see D-Bus standard.
613
"""
614
prop = self._get_dbus_property(interface_name, property_name)
615
if prop._dbus_access == u"read":
616
raise DBusPropertyAccessException(property_name)
617
if prop._dbus_get_args_options[u"byte_arrays"]:
618
# The byte_arrays option is not supported yet on
619
# signatures other than "ay".
620
if prop._dbus_signature != u"ay":
621
raise ValueError
622
value = dbus.ByteArray(''.join(unichr(byte)
623
for byte in value))
624
prop(value)
625
626
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
627
out_signature=u"a{sv}")
628
def GetAll(self, interface_name):
629
"""Standard D-Bus property GetAll() method, see D-Bus
630
standard.
631
632
Note: Will not include properties with access="write".
633
"""
634
all = {}
635
for name, prop in self._get_all_dbus_properties():
636
if (interface_name
637
and interface_name != prop._dbus_interface):
638
# Interface non-empty but did not match
639
continue
640
# Ignore write-only properties
641
if prop._dbus_access == u"write":
642
continue
643
value = prop()
644
if not hasattr(value, u"variant_level"):
645
all[name] = value
646
continue
647
all[name] = type(value)(value, variant_level=
648
value.variant_level+1)
649
return dbus.Dictionary(all, signature=u"sv")
650
651
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
652
out_signature=u"s",
653
path_keyword='object_path',
654
connection_keyword='connection')
655
def Introspect(self, object_path, connection):
656
"""Standard D-Bus method, overloaded to insert property tags.
657
"""
658
xmlstring = dbus.service.Object.Introspect(self, object_path,
659
connection)
660
try:
661
document = xml.dom.minidom.parseString(xmlstring)
662
def make_tag(document, name, prop):
663
e = document.createElement(u"property")
664
e.setAttribute(u"name", name)
665
e.setAttribute(u"type", prop._dbus_signature)
666
e.setAttribute(u"access", prop._dbus_access)
667
return e
668
for if_tag in document.getElementsByTagName(u"interface"):
669
for tag in (make_tag(document, name, prop)
670
for name, prop
671
in self._get_all_dbus_properties()
672
if prop._dbus_interface
673
== if_tag.getAttribute(u"name")):
674
if_tag.appendChild(tag)
675
# Add the names to the return values for the
676
# "org.freedesktop.DBus.Properties" methods
677
if (if_tag.getAttribute(u"name")
678
== u"org.freedesktop.DBus.Properties"):
679
for cn in if_tag.getElementsByTagName(u"method"):
680
if cn.getAttribute(u"name") == u"Get":
681
for arg in cn.getElementsByTagName(u"arg"):
682
if (arg.getAttribute(u"direction")
683
== u"out"):
684
arg.setAttribute(u"name", u"value")
685
elif cn.getAttribute(u"name") == u"GetAll":
686
for arg in cn.getElementsByTagName(u"arg"):
687
if (arg.getAttribute(u"direction")
688
== u"out"):
689
arg.setAttribute(u"name", u"props")
690
xmlstring = document.toxml(u"utf-8")
691
document.unlink()
692
except (AttributeError, xml.dom.DOMException,
693
xml.parsers.expat.ExpatError), error:
694
logger.error(u"Failed to override Introspection method",
695
error)
696
return xmlstring
697
698
699
class ClientDBus(Client, DBusObjectWithProperties):
700
"""A Client class using D-Bus
701
702
Attributes:
703
dbus_object_path: dbus.ObjectPath
704
bus: dbus.SystemBus()
705
"""
706
# dbus.service.Object doesn't use super(), so we can't either.
707
708
def __init__(self, bus = None, *args, **kwargs):
709
self._approvals_pending = 0
710
self.bus = bus
711
Client.__init__(self, *args, **kwargs)
712
# Only now, when this client is initialized, can it show up on
713
# the D-Bus
714
self.dbus_object_path = (dbus.ObjectPath
715
(u"/clients/"
716
+ self.name.replace(u".", u"_")))
717
DBusObjectWithProperties.__init__(self, self.bus,
718
self.dbus_object_path)
719
720
def _get_approvals_pending(self):
721
return self._approvals_pending
722
def _set_approvals_pending(self, value):
723
old_value = self._approvals_pending
724
self._approvals_pending = value
725
bval = bool(value)
726
if (hasattr(self, "dbus_object_path")
727
and bval is not bool(old_value)):
728
dbus_bool = dbus.Boolean(bval, variant_level=1)
729
self.PropertyChanged(dbus.String(u"ApprovalPending"),
730
dbus_bool)
731
732
approvals_pending = property(_get_approvals_pending,
733
_set_approvals_pending)
734
del _get_approvals_pending, _set_approvals_pending
735
736
@staticmethod
737
def _datetime_to_dbus(dt, variant_level=0):
738
"""Convert a UTC datetime.datetime() to a D-Bus type."""
739
return dbus.String(dt.isoformat(),
740
variant_level=variant_level)
741
742
def enable(self):
743
oldstate = getattr(self, u"enabled", False)
744
r = Client.enable(self)
745
if oldstate != self.enabled:
746
# Emit D-Bus signals
747
self.PropertyChanged(dbus.String(u"Enabled"),
748
dbus.Boolean(True, variant_level=1))
749
self.PropertyChanged(
750
dbus.String(u"LastEnabled"),
751
self._datetime_to_dbus(self.last_enabled,
752
variant_level=1))
753
return r
754
755
def disable(self, quiet = False):
756
oldstate = getattr(self, u"enabled", False)
757
r = Client.disable(self, quiet=quiet)
758
if not quiet and oldstate != self.enabled:
759
# Emit D-Bus signal
760
self.PropertyChanged(dbus.String(u"Enabled"),
761
dbus.Boolean(False, variant_level=1))
762
return r
763
764
def __del__(self, *args, **kwargs):
765
try:
766
self.remove_from_connection()
767
except LookupError:
768
pass
769
if hasattr(DBusObjectWithProperties, u"__del__"):
770
DBusObjectWithProperties.__del__(self, *args, **kwargs)
771
Client.__del__(self, *args, **kwargs)
772
773
def checker_callback(self, pid, condition, command,
774
*args, **kwargs):
775
self.checker_callback_tag = None
776
self.checker = None
777
# Emit D-Bus signal
778
self.PropertyChanged(dbus.String(u"CheckerRunning"),
779
dbus.Boolean(False, variant_level=1))
780
if os.WIFEXITED(condition):
781
exitstatus = os.WEXITSTATUS(condition)
782
# Emit D-Bus signal
783
self.CheckerCompleted(dbus.Int16(exitstatus),
784
dbus.Int64(condition),
785
dbus.String(command))
786
else:
787
# Emit D-Bus signal
788
self.CheckerCompleted(dbus.Int16(-1),
789
dbus.Int64(condition),
790
dbus.String(command))
791
792
return Client.checker_callback(self, pid, condition, command,
793
*args, **kwargs)
794
795
def checked_ok(self, *args, **kwargs):
796
r = Client.checked_ok(self, *args, **kwargs)
797
# Emit D-Bus signal
798
self.PropertyChanged(
799
dbus.String(u"LastCheckedOK"),
800
(self._datetime_to_dbus(self.last_checked_ok,
801
variant_level=1)))
802
return r
803
804
def start_checker(self, *args, **kwargs):
805
old_checker = self.checker
806
if self.checker is not None:
807
old_checker_pid = self.checker.pid
808
else:
809
old_checker_pid = None
810
r = Client.start_checker(self, *args, **kwargs)
811
# Only if new checker process was started
812
if (self.checker is not None
813
and old_checker_pid != self.checker.pid):
814
# Emit D-Bus signal
815
self.CheckerStarted(self.current_checker_command)
816
self.PropertyChanged(
817
dbus.String(u"CheckerRunning"),
818
dbus.Boolean(True, variant_level=1))
819
return r
820
821
def stop_checker(self, *args, **kwargs):
822
old_checker = getattr(self, u"checker", None)
823
r = Client.stop_checker(self, *args, **kwargs)
824
if (old_checker is not None
825
and getattr(self, u"checker", None) is None):
826
self.PropertyChanged(dbus.String(u"CheckerRunning"),
827
dbus.Boolean(False, variant_level=1))
828
return r
829
830
def _reset_approved(self):
831
self._approved = None
832
return False
833
834
def approve(self, value=True):
835
self.send_changedstate()
836
self._approved = value
837
gobject.timeout_add(self._timedelta_to_milliseconds
838
(self.approval_duration),
839
self._reset_approved)
840
841
842
## D-Bus methods, signals & properties
843
_interface = u"se.bsnet.fukt.Mandos.Client"
844
845
## Signals
846
847
# CheckerCompleted - signal
848
@dbus.service.signal(_interface, signature=u"nxs")
849
def CheckerCompleted(self, exitcode, waitstatus, command):
850
"D-Bus signal"
851
pass
852
853
# CheckerStarted - signal
854
@dbus.service.signal(_interface, signature=u"s")
855
def CheckerStarted(self, command):
856
"D-Bus signal"
857
pass
858
859
# PropertyChanged - signal
860
@dbus.service.signal(_interface, signature=u"sv")
861
def PropertyChanged(self, property, value):
862
"D-Bus signal"
863
pass
864
865
# GotSecret - signal
866
@dbus.service.signal(_interface)
867
def GotSecret(self):
868
"""D-Bus signal
869
Is sent after a successful transfer of secret from the Mandos
870
server to mandos-client
871
"""
872
pass
873
874
# Rejected - signal
875
@dbus.service.signal(_interface, signature=u"s")
876
def Rejected(self, reason):
877
"D-Bus signal"
878
pass
879
880
# NeedApproval - signal
881
@dbus.service.signal(_interface, signature=u"tb")
882
def NeedApproval(self, timeout, default):
883
"D-Bus signal"
884
pass
885
886
## Methods
887
888
# Approve - method
889
@dbus.service.method(_interface, in_signature=u"b")
890
def Approve(self, value):
891
self.approve(value)
892
893
# CheckedOK - method
894
@dbus.service.method(_interface)
895
def CheckedOK(self):
896
return self.checked_ok()
897
898
# Enable - method
899
@dbus.service.method(_interface)
900
def Enable(self):
901
"D-Bus method"
902
self.enable()
903
904
# StartChecker - method
905
@dbus.service.method(_interface)
906
def StartChecker(self):
907
"D-Bus method"
908
self.start_checker()
909
910
# Disable - method
911
@dbus.service.method(_interface)
912
def Disable(self):
913
"D-Bus method"
914
self.disable()
915
916
# StopChecker - method
917
@dbus.service.method(_interface)
918
def StopChecker(self):
919
self.stop_checker()
920
921
## Properties
922
923
# ApprovalPending - property
924
@dbus_service_property(_interface, signature=u"b", access=u"read")
925
def ApprovalPending_dbus_property(self):
926
return dbus.Boolean(bool(self.approvals_pending))
927
928
# ApprovedByDefault - property
929
@dbus_service_property(_interface, signature=u"b",
930
access=u"readwrite")
931
def ApprovedByDefault_dbus_property(self, value=None):
932
if value is None: # get
933
return dbus.Boolean(self.approved_by_default)
934
self.approved_by_default = bool(value)
935
# Emit D-Bus signal
936
self.PropertyChanged(dbus.String(u"ApprovedByDefault"),
937
dbus.Boolean(value, variant_level=1))
938
939
# ApprovalDelay - property
940
@dbus_service_property(_interface, signature=u"t",
941
access=u"readwrite")
942
def ApprovalDelay_dbus_property(self, value=None):
943
if value is None: # get
944
return dbus.UInt64(self.approval_delay_milliseconds())
945
self.approval_delay = datetime.timedelta(0, 0, 0, value)
946
# Emit D-Bus signal
947
self.PropertyChanged(dbus.String(u"ApprovalDelay"),
948
dbus.UInt64(value, variant_level=1))
949
950
# ApprovalDuration - property
951
@dbus_service_property(_interface, signature=u"t",
952
access=u"readwrite")
953
def ApprovalDuration_dbus_property(self, value=None):
954
if value is None: # get
955
return dbus.UInt64(self._timedelta_to_milliseconds(
956
self.approval_duration))
957
self.approval_duration = datetime.timedelta(0, 0, 0, value)
958
# Emit D-Bus signal
959
self.PropertyChanged(dbus.String(u"ApprovalDuration"),
960
dbus.UInt64(value, variant_level=1))
961
962
# Name - property
963
@dbus_service_property(_interface, signature=u"s", access=u"read")
964
def Name_dbus_property(self):
965
return dbus.String(self.name)
966
967
# Fingerprint - property
968
@dbus_service_property(_interface, signature=u"s", access=u"read")
969
def Fingerprint_dbus_property(self):
970
return dbus.String(self.fingerprint)
971
972
# Host - property
973
@dbus_service_property(_interface, signature=u"s",
974
access=u"readwrite")
975
def Host_dbus_property(self, value=None):
976
if value is None: # get
977
return dbus.String(self.host)
978
self.host = value
979
# Emit D-Bus signal
980
self.PropertyChanged(dbus.String(u"Host"),
981
dbus.String(value, variant_level=1))
982
983
# Created - property
984
@dbus_service_property(_interface, signature=u"s", access=u"read")
985
def Created_dbus_property(self):
986
return dbus.String(self._datetime_to_dbus(self.created))
987
988
# LastEnabled - property
989
@dbus_service_property(_interface, signature=u"s", access=u"read")
990
def LastEnabled_dbus_property(self):
991
if self.last_enabled is None:
992
return dbus.String(u"")
993
return dbus.String(self._datetime_to_dbus(self.last_enabled))
994
995
# Enabled - property
996
@dbus_service_property(_interface, signature=u"b",
997
access=u"readwrite")
998
def Enabled_dbus_property(self, value=None):
999
if value is None: # get
1000
return dbus.Boolean(self.enabled)
1001
if value:
1002
self.enable()
1003
else:
1004
self.disable()
1005
1006
# LastCheckedOK - property
1007
@dbus_service_property(_interface, signature=u"s",
1008
access=u"readwrite")
1009
def LastCheckedOK_dbus_property(self, value=None):
1010
if value is not None:
1011
self.checked_ok()
1012
return
382
1013
if self.last_checked_ok is None:
383
return now < (self.created + self.timeout)
384
else:
385
return now < (self.last_checked_ok + self.timeout)
386
387
388
def peer_certificate(session):
389
"Return the peer's OpenPGP certificate as a bytestring"
390
# If not an OpenPGP certificate...
391
if gnutls.library.functions.gnutls_certificate_type_get\
392
(session._c_object) \
393
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
394
# ...do the normal thing
395
return session.peer_certificate
396
list_size = ctypes.c_uint()
397
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
398
(session._c_object, ctypes.byref(list_size))
399
if list_size.value == 0:
400
return None
401
cert = cert_list[0]
402
return ctypes.string_at(cert.data, cert.size)
403
404
405
def fingerprint(openpgp):
406
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
407
# New GnuTLS "datum" with the OpenPGP public key
408
datum = gnutls.library.types.gnutls_datum_t\
409
(ctypes.cast(ctypes.c_char_p(openpgp),
410
ctypes.POINTER(ctypes.c_ubyte)),
411
ctypes.c_uint(len(openpgp)))
412
# New empty GnuTLS certificate
413
crt = gnutls.library.types.gnutls_openpgp_crt_t()
414
gnutls.library.functions.gnutls_openpgp_crt_init\
415
(ctypes.byref(crt))
416
# Import the OpenPGP public key into the certificate
417
gnutls.library.functions.gnutls_openpgp_crt_import\
418
(crt, ctypes.byref(datum),
419
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
420
# Verify the self signature in the key
421
crtverify = ctypes.c_uint()
422
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
423
(crt, 0, ctypes.byref(crtverify))
424
if crtverify.value != 0:
425
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
426
raise gnutls.errors.CertificateSecurityError("Verify failed")
427
# New buffer for the fingerprint
428
buf = ctypes.create_string_buffer(20)
429
buf_len = ctypes.c_size_t()
430
# Get the fingerprint from the certificate into the buffer
431
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
432
(crt, ctypes.byref(buf), ctypes.byref(buf_len))
433
# Deinit the certificate
434
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
435
# Convert the buffer to a Python bytestring
436
fpr = ctypes.string_at(buf, buf_len.value)
437
# Convert the bytestring to hexadecimal notation
438
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
439
return hex_fpr
440
441
442
class TCP_handler(SocketServer.BaseRequestHandler, object):
443
"""A TCP request handler class.
444
Instantiated by IPv6_TCPServer for each request to handle it.
1014
return dbus.String(u"")
1015
return dbus.String(self._datetime_to_dbus(self
1016
.last_checked_ok))
1017
1018
# Timeout - property
1019
@dbus_service_property(_interface, signature=u"t",
1020
access=u"readwrite")
1021
def Timeout_dbus_property(self, value=None):
1022
if value is None: # get
1023
return dbus.UInt64(self.timeout_milliseconds())
1024
self.timeout = datetime.timedelta(0, 0, 0, value)
1025
# Emit D-Bus signal
1026
self.PropertyChanged(dbus.String(u"Timeout"),
1027
dbus.UInt64(value, variant_level=1))
1028
if getattr(self, u"disable_initiator_tag", None) is None:
1029
return
1030
# Reschedule timeout
1031
gobject.source_remove(self.disable_initiator_tag)
1032
self.disable_initiator_tag = None
1033
time_to_die = (self.
1034
_timedelta_to_milliseconds((self
1035
.last_checked_ok
1036
+ self.timeout)
1037
- datetime.datetime
1038
.utcnow()))
1039
if time_to_die <= 0:
1040
# The timeout has passed
1041
self.disable()
1042
else:
1043
self.disable_initiator_tag = (gobject.timeout_add
1044
(time_to_die, self.disable))
1045
1046
# Interval - property
1047
@dbus_service_property(_interface, signature=u"t",
1048
access=u"readwrite")
1049
def Interval_dbus_property(self, value=None):
1050
if value is None: # get
1051
return dbus.UInt64(self.interval_milliseconds())
1052
self.interval = datetime.timedelta(0, 0, 0, value)
1053
# Emit D-Bus signal
1054
self.PropertyChanged(dbus.String(u"Interval"),
1055
dbus.UInt64(value, variant_level=1))
1056
if getattr(self, u"checker_initiator_tag", None) is None:
1057
return
1058
# Reschedule checker run
1059
gobject.source_remove(self.checker_initiator_tag)
1060
self.checker_initiator_tag = (gobject.timeout_add
1061
(value, self.start_checker))
1062
self.start_checker() # Start one now, too
1063
1064
# Checker - property
1065
@dbus_service_property(_interface, signature=u"s",
1066
access=u"readwrite")
1067
def Checker_dbus_property(self, value=None):
1068
if value is None: # get
1069
return dbus.String(self.checker_command)
1070
self.checker_command = value
1071
# Emit D-Bus signal
1072
self.PropertyChanged(dbus.String(u"Checker"),
1073
dbus.String(self.checker_command,
1074
variant_level=1))
1075
1076
# CheckerRunning - property
1077
@dbus_service_property(_interface, signature=u"b",
1078
access=u"readwrite")
1079
def CheckerRunning_dbus_property(self, value=None):
1080
if value is None: # get
1081
return dbus.Boolean(self.checker is not None)
1082
if value:
1083
self.start_checker()
1084
else:
1085
self.stop_checker()
1086
1087
# ObjectPath - property
1088
@dbus_service_property(_interface, signature=u"o", access=u"read")
1089
def ObjectPath_dbus_property(self):
1090
return self.dbus_object_path # is already a dbus.ObjectPath
1091
1092
# Secret = property
1093
@dbus_service_property(_interface, signature=u"ay",
1094
access=u"write", byte_arrays=True)
1095
def Secret_dbus_property(self, value):
1096
self.secret = str(value)
1097
1098
del _interface
1099
1100
1101
class ProxyClient(object):
1102
def __init__(self, child_pipe, fpr, address):
1103
self._pipe = child_pipe
1104
self._pipe.send(('init', fpr, address))
1105
if not self._pipe.recv():
1106
raise KeyError()
1107
1108
def __getattribute__(self, name):
1109
if(name == '_pipe'):
1110
return super(ProxyClient, self).__getattribute__(name)
1111
self._pipe.send(('getattr', name))
1112
data = self._pipe.recv()
1113
if data[0] == 'data':
1114
return data[1]
1115
if data[0] == 'function':
1116
def func(*args, **kwargs):
1117
self._pipe.send(('funcall', name, args, kwargs))
1118
return self._pipe.recv()[1]
1119
return func
1120
1121
def __setattr__(self, name, value):
1122
if(name == '_pipe'):
1123
return super(ProxyClient, self).__setattr__(name, value)
1124
self._pipe.send(('setattr', name, value))
1125
1126
1127
class ClientHandler(socketserver.BaseRequestHandler, object):
1128
"""A class to handle client connections.
1129
1130
Instantiated once for each connection to handle it.
445
1131
Note: This will run in its own forked process."""
446
1132
447
1133
def handle(self):
448
logger.info(u"TCP connection from: %s",
449
unicode(self.client_address))
450
session = gnutls.connection.ClientSession\
451
(self.request, gnutls.connection.X509Credentials())
452
453
line = self.request.makefile().readline()
454
logger.debug(u"Protocol version: %r", line)
455
try:
456
if int(line.strip().split()[0]) > 1:
457
raise RuntimeError
458
except (ValueError, IndexError, RuntimeError), error:
459
logger.error(u"Unknown protocol version: %s", error)
460
return
461
462
# Note: gnutls.connection.X509Credentials is really a generic
463
# GnuTLS certificate credentials object so long as no X.509
464
# keys are added to it. Therefore, we can use it here despite
465
# using OpenPGP certificates.
466
467
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
468
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
469
# "+DHE-DSS"))
470
priority = "NORMAL" # Fallback default, since this
471
# MUST be set.
472
if self.server.settings["priority"]:
473
priority = self.server.settings["priority"]
474
gnutls.library.functions.gnutls_priority_set_direct\
475
(session._c_object, priority, None)
476
477
try:
478
session.handshake()
479
except gnutls.errors.GNUTLSError, error:
480
logger.warning(u"Handshake failed: %s", error)
481
# Do not run session.bye() here: the session is not
482
# established. Just abandon the request.
483
return
484
try:
485
fpr = fingerprint(peer_certificate(session))
486
except (TypeError, gnutls.errors.GNUTLSError), error:
487
logger.warning(u"Bad certificate: %s", error)
488
session.bye()
489
return
490
logger.debug(u"Fingerprint: %s", fpr)
491
client = None
492
for c in self.server.clients:
493
if c.fingerprint == fpr:
494
client = c
495
break
496
if not client:
497
logger.warning(u"Client not found for fingerprint: %s",
498
fpr)
499
session.bye()
500
return
501
# Have to check if client.still_valid(), since it is possible
502
# that the client timed out while establishing the GnuTLS
503
# session.
504
if not client.still_valid():
505
logger.warning(u"Client %(name)s is invalid",
506
vars(client))
507
session.bye()
508
return
509
sent_size = 0
510
while sent_size < len(client.secret):
511
sent = session.send(client.secret[sent_size:])
512
logger.debug(u"Sent: %d, remaining: %d",
513
sent, len(client.secret)
514
- (sent_size + sent))
515
sent_size += sent
516
session.bye()
517
518
519
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
520
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1134
with contextlib.closing(self.server.child_pipe) as child_pipe:
1135
logger.info(u"TCP connection from: %s",
1136
unicode(self.client_address))
1137
logger.debug(u"Pipe FD: %d",
1138
self.server.child_pipe.fileno())
1139
1140
session = (gnutls.connection
1141
.ClientSession(self.request,
1142
gnutls.connection
1143
.X509Credentials()))
1144
1145
# Note: gnutls.connection.X509Credentials is really a
1146
# generic GnuTLS certificate credentials object so long as
1147
# no X.509 keys are added to it. Therefore, we can use it
1148
# here despite using OpenPGP certificates.
1149
1150
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1151
# u"+AES-256-CBC", u"+SHA1",
1152
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1153
# u"+DHE-DSS"))
1154
# Use a fallback default, since this MUST be set.
1155
priority = self.server.gnutls_priority
1156
if priority is None:
1157
priority = u"NORMAL"
1158
(gnutls.library.functions
1159
.gnutls_priority_set_direct(session._c_object,
1160
priority, None))
1161
1162
# Start communication using the Mandos protocol
1163
# Get protocol number
1164
line = self.request.makefile().readline()
1165
logger.debug(u"Protocol version: %r", line)
1166
try:
1167
if int(line.strip().split()[0]) > 1:
1168
raise RuntimeError
1169
except (ValueError, IndexError, RuntimeError), error:
1170
logger.error(u"Unknown protocol version: %s", error)
1171
return
1172
1173
# Start GnuTLS connection
1174
try:
1175
session.handshake()
1176
except gnutls.errors.GNUTLSError, error:
1177
logger.warning(u"Handshake failed: %s", error)
1178
# Do not run session.bye() here: the session is not
1179
# established. Just abandon the request.
1180
return
1181
logger.debug(u"Handshake succeeded")
1182
1183
approval_required = False
1184
try:
1185
try:
1186
fpr = self.fingerprint(self.peer_certificate
1187
(session))
1188
except (TypeError, gnutls.errors.GNUTLSError), error:
1189
logger.warning(u"Bad certificate: %s", error)
1190
return
1191
logger.debug(u"Fingerprint: %s", fpr)
1192
1193
try:
1194
client = ProxyClient(child_pipe, fpr,
1195
self.client_address)
1196
except KeyError:
1197
return
1198
1199
if client.approval_delay:
1200
delay = client.approval_delay
1201
client.approvals_pending += 1
1202
approval_required = True
1203
1204
while True:
1205
if not client.enabled:
1206
logger.warning(u"Client %s is disabled",
1207
client.name)
1208
if self.server.use_dbus:
1209
# Emit D-Bus signal
1210
client.Rejected("Disabled")
1211
return
1212
1213
if client._approved or not client.approval_delay:
1214
#We are approved or approval is disabled
1215
break
1216
elif client._approved is None:
1217
logger.info(u"Client %s needs approval",
1218
client.name)
1219
if self.server.use_dbus:
1220
# Emit D-Bus signal
1221
client.NeedApproval(
1222
client.approval_delay_milliseconds(),
1223
client.approved_by_default)
1224
else:
1225
logger.warning(u"Client %s was not approved",
1226
client.name)
1227
if self.server.use_dbus:
1228
# Emit D-Bus signal
1229
client.Rejected("Denied")
1230
return
1231
1232
#wait until timeout or approved
1233
#x = float(client._timedelta_to_milliseconds(delay))
1234
time = datetime.datetime.now()
1235
client.changedstate.acquire()
1236
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1237
client.changedstate.release()
1238
time2 = datetime.datetime.now()
1239
if (time2 - time) >= delay:
1240
if not client.approved_by_default:
1241
logger.warning("Client %s timed out while"
1242
" waiting for approval",
1243
client.name)
1244
if self.server.use_dbus:
1245
# Emit D-Bus signal
1246
client.Rejected("Timed out")
1247
return
1248
else:
1249
break
1250
else:
1251
delay -= time2 - time
1252
1253
sent_size = 0
1254
while sent_size < len(client.secret):
1255
try:
1256
sent = session.send(client.secret[sent_size:])
1257
except (gnutls.errors.GNUTLSError), error:
1258
logger.warning("gnutls send failed")
1259
return
1260
logger.debug(u"Sent: %d, remaining: %d",
1261
sent, len(client.secret)
1262
- (sent_size + sent))
1263
sent_size += sent
1264
1265
logger.info(u"Sending secret to %s", client.name)
1266
# bump the timeout as if seen
1267
client.checked_ok()
1268
if self.server.use_dbus:
1269
# Emit D-Bus signal
1270
client.GotSecret()
1271
1272
finally:
1273
if approval_required:
1274
client.approvals_pending -= 1
1275
try:
1276
session.bye()
1277
except (gnutls.errors.GNUTLSError), error:
1278
logger.warning("GnuTLS bye failed")
1279
1280
@staticmethod
1281
def peer_certificate(session):
1282
"Return the peer's OpenPGP certificate as a bytestring"
1283
# If not an OpenPGP certificate...
1284
if (gnutls.library.functions
1285
.gnutls_certificate_type_get(session._c_object)
1286
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1287
# ...do the normal thing
1288
return session.peer_certificate
1289
list_size = ctypes.c_uint(1)
1290
cert_list = (gnutls.library.functions
1291
.gnutls_certificate_get_peers
1292
(session._c_object, ctypes.byref(list_size)))
1293
if not bool(cert_list) and list_size.value != 0:
1294
raise gnutls.errors.GNUTLSError(u"error getting peer"
1295
u" certificate")
1296
if list_size.value == 0:
1297
return None
1298
cert = cert_list[0]
1299
return ctypes.string_at(cert.data, cert.size)
1300
1301
@staticmethod
1302
def fingerprint(openpgp):
1303
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1304
# New GnuTLS "datum" with the OpenPGP public key
1305
datum = (gnutls.library.types
1306
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1307
ctypes.POINTER
1308
(ctypes.c_ubyte)),
1309
ctypes.c_uint(len(openpgp))))
1310
# New empty GnuTLS certificate
1311
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1312
(gnutls.library.functions
1313
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1314
# Import the OpenPGP public key into the certificate
1315
(gnutls.library.functions
1316
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1317
gnutls.library.constants
1318
.GNUTLS_OPENPGP_FMT_RAW))
1319
# Verify the self signature in the key
1320
crtverify = ctypes.c_uint()
1321
(gnutls.library.functions
1322
.gnutls_openpgp_crt_verify_self(crt, 0,
1323
ctypes.byref(crtverify)))
1324
if crtverify.value != 0:
1325
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1326
raise (gnutls.errors.CertificateSecurityError
1327
(u"Verify failed"))
1328
# New buffer for the fingerprint
1329
buf = ctypes.create_string_buffer(20)
1330
buf_len = ctypes.c_size_t()
1331
# Get the fingerprint from the certificate into the buffer
1332
(gnutls.library.functions
1333
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1334
ctypes.byref(buf_len)))
1335
# Deinit the certificate
1336
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1337
# Convert the buffer to a Python bytestring
1338
fpr = ctypes.string_at(buf, buf_len.value)
1339
# Convert the bytestring to hexadecimal notation
1340
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1341
return hex_fpr
1342
1343
1344
class MultiprocessingMixIn(object):
1345
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1346
def sub_process_main(self, request, address):
1347
try:
1348
self.finish_request(request, address)
1349
except:
1350
self.handle_error(request, address)
1351
self.close_request(request)
1352
1353
def process_request(self, request, address):
1354
"""Start a new process to process the request."""
1355
multiprocessing.Process(target = self.sub_process_main,
1356
args = (request, address)).start()
1357
1358
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1359
""" adds a pipe to the MixIn """
1360
def process_request(self, request, client_address):
1361
"""Overrides and wraps the original process_request().
1362
1363
This function creates a new pipe in self.pipe
1364
"""
1365
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1366
1367
super(MultiprocessingMixInWithPipe,
1368
self).process_request(request, client_address)
1369
self.child_pipe.close()
1370
self.add_pipe(parent_pipe)
1371
1372
def add_pipe(self, parent_pipe):
1373
"""Dummy function; override as necessary"""
1374
pass
1375
1376
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1377
socketserver.TCPServer, object):
1378
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1379
521
1380
Attributes:
522
settings: Server settings
523
clients: Set() of Client objects
524
1381
enabled: Boolean; whether this server is activated yet
1382
interface: None or a network interface name (string)
1383
use_ipv6: Boolean; to use IPv6 or not
525
1384
"""
526
address_family = socket.AF_INET6
527
def __init__(self, *args, **kwargs):
528
if "settings" in kwargs:
529
self.settings = kwargs["settings"]
530
del kwargs["settings"]
531
if "clients" in kwargs:
532
self.clients = kwargs["clients"]
533
del kwargs["clients"]
534
self.enabled = False
535
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1385
def __init__(self, server_address, RequestHandlerClass,
1386
interface=None, use_ipv6=True):
1387
self.interface = interface
1388
if use_ipv6:
1389
self.address_family = socket.AF_INET6
1390
socketserver.TCPServer.__init__(self, server_address,
1391
RequestHandlerClass)
536
1392
def server_bind(self):
537
1393
"""This overrides the normal server_bind() function
538
1394
to bind to an interface if one was specified, and also NOT to
539
1395
bind to an address or port if they were not specified."""
540
if self.settings["interface"]:
541
# 25 is from /usr/include/asm-i486/socket.h
542
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
543
try:
544
self.socket.setsockopt(socket.SOL_SOCKET,
545
SO_BINDTODEVICE,
546
self.settings["interface"])
547
except socket.error, error:
548
if error[0] == errno.EPERM:
549
logger.error(u"No permission to"
550
u" bind to interface %s",
551
self.settings["interface"])
552
else:
553
raise error
1396
if self.interface is not None:
1397
if SO_BINDTODEVICE is None:
1398
logger.error(u"SO_BINDTODEVICE does not exist;"
1399
u" cannot bind to interface %s",
1400
self.interface)
1401
else:
1402
try:
1403
self.socket.setsockopt(socket.SOL_SOCKET,
1404
SO_BINDTODEVICE,
1405
str(self.interface
1406
+ u'\0'))
1407
except socket.error, error:
1408
if error[0] == errno.EPERM:
1409
logger.error(u"No permission to"
1410
u" bind to interface %s",
1411
self.interface)
1412
elif error[0] == errno.ENOPROTOOPT:
1413
logger.error(u"SO_BINDTODEVICE not available;"
1414
u" cannot bind to interface %s",
1415
self.interface)
1416
else:
1417
raise
554
1418
# Only bind(2) the socket if we really need to.
555
1419
if self.server_address[0] or self.server_address[1]:
556
1420
if not self.server_address[0]:
557
in6addr_any = "::"
558
self.server_address = (in6addr_any,
1421
if self.address_family == socket.AF_INET6:
1422
any_address = u"::" # in6addr_any
1423
else:
1424
any_address = socket.INADDR_ANY
1425
self.server_address = (any_address,
559
1426
self.server_address[1])
560
1427
elif not self.server_address[1]:
561
1428
self.server_address = (self.server_address[0],
562
1429
0)
563
# if self.settings["interface"]:
1430
# if self.interface:
564
1431
# self.server_address = (self.server_address[0],
565
1432
# 0, # port
566
1433
# 0, # flowinfo
567
1434
# if_nametoindex
568
# (self.settings
569
# ["interface"]))
570
return super(IPv6_TCPServer, self).server_bind()
1435
# (self.interface))
1436
return socketserver.TCPServer.server_bind(self)
1437
1438
1439
class MandosServer(IPv6_TCPServer):
1440
"""Mandos server.
1441
1442
Attributes:
1443
clients: set of Client objects
1444
gnutls_priority GnuTLS priority string
1445
use_dbus: Boolean; to emit D-Bus signals or not
1446
1447
Assumes a gobject.MainLoop event loop.
1448
"""
1449
def __init__(self, server_address, RequestHandlerClass,
1450
interface=None, use_ipv6=True, clients=None,
1451
gnutls_priority=None, use_dbus=True):
1452
self.enabled = False
1453
self.clients = clients
1454
if self.clients is None:
1455
self.clients = set()
1456
self.use_dbus = use_dbus
1457
self.gnutls_priority = gnutls_priority
1458
IPv6_TCPServer.__init__(self, server_address,
1459
RequestHandlerClass,
1460
interface = interface,
1461
use_ipv6 = use_ipv6)
571
1462
def server_activate(self):
572
1463
if self.enabled:
573
return super(IPv6_TCPServer, self).server_activate()
1464
return socketserver.TCPServer.server_activate(self)
574
1465
def enable(self):
575
1466
self.enabled = True
1467
def add_pipe(self, parent_pipe):
1468
# Call "handle_ipc" for both data and EOF events
1469
gobject.io_add_watch(parent_pipe.fileno(),
1470
gobject.IO_IN | gobject.IO_HUP,
1471
functools.partial(self.handle_ipc,
1472
parent_pipe = parent_pipe))
1473
1474
def handle_ipc(self, source, condition, parent_pipe=None,
1475
client_object=None):
1476
condition_names = {
1477
gobject.IO_IN: u"IN", # There is data to read.
1478
gobject.IO_OUT: u"OUT", # Data can be written (without
1479
# blocking).
1480
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1481
gobject.IO_ERR: u"ERR", # Error condition.
1482
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1483
# broken, usually for pipes and
1484
# sockets).
1485
}
1486
conditions_string = ' | '.join(name
1487
for cond, name in
1488
condition_names.iteritems()
1489
if cond & condition)
1490
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1491
conditions_string)
1492
1493
# error or the other end of multiprocessing.Pipe has closed
1494
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1495
return False
1496
1497
# Read a request from the child
1498
request = parent_pipe.recv()
1499
logger.debug(u"IPC request: %s", repr(request))
1500
command = request[0]
1501
1502
if command == 'init':
1503
fpr = request[1]
1504
address = request[2]
1505
1506
for c in self.clients:
1507
if c.fingerprint == fpr:
1508
client = c
1509
break
1510
else:
1511
logger.warning(u"Client not found for fingerprint: %s, ad"
1512
u"dress: %s", fpr, address)
1513
if self.use_dbus:
1514
# Emit D-Bus signal
1515
mandos_dbus_service.ClientNotFound(fpr, address)
1516
parent_pipe.send(False)
1517
return False
1518
1519
gobject.io_add_watch(parent_pipe.fileno(),
1520
gobject.IO_IN | gobject.IO_HUP,
1521
functools.partial(self.handle_ipc,
1522
parent_pipe = parent_pipe,
1523
client_object = client))
1524
parent_pipe.send(True)
1525
# remove the old hook in favor of the new above hook on same fileno
1526
return False
1527
if command == 'funcall':
1528
funcname = request[1]
1529
args = request[2]
1530
kwargs = request[3]
1531
1532
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1533
1534
if command == 'getattr':
1535
attrname = request[1]
1536
if callable(client_object.__getattribute__(attrname)):
1537
parent_pipe.send(('function',))
1538
else:
1539
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1540
1541
if command == 'setattr':
1542
attrname = request[1]
1543
value = request[2]
1544
setattr(client_object, attrname, value)
1545
1546
return True
576
1547
577
1548
578
1549
def string_to_delta(interval):
579
1550
"""Parse a string and return a datetime.timedelta
580
581
>>> string_to_delta('7d')
1551
1552
>>> string_to_delta(u'7d')
582
1553
datetime.timedelta(7)
583
>>> string_to_delta('60s')
1554
>>> string_to_delta(u'60s')
584
1555
datetime.timedelta(0, 60)
585
>>> string_to_delta('60m')
1556
>>> string_to_delta(u'60m')
586
1557
datetime.timedelta(0, 3600)
587
>>> string_to_delta('24h')
1558
>>> string_to_delta(u'24h')
588
1559
datetime.timedelta(1)
589
1560
>>> string_to_delta(u'1w')
590
1561
datetime.timedelta(7)
591
>>> string_to_delta('5m 30s')
1562
>>> string_to_delta(u'5m 30s')
592
1563
datetime.timedelta(0, 330)
593
1564
"""
594
1565
timevalue = datetime.timedelta(0)
607
1578
elif suffix == u"w":
608
1579
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
609
1580
else:
610
raise ValueError
611
except (ValueError, IndexError):
612
raise ValueError
1581
raise ValueError(u"Unknown suffix %r" % suffix)
1582
except (ValueError, IndexError), e:
1583
raise ValueError(e.message)
613
1584
timevalue += delta
614
1585
return timevalue
615
1586
616
1587
617
def server_state_changed(state):
618
"""Derived from the Avahi example code"""
619
if state == avahi.SERVER_COLLISION:
620
logger.error(u"Zeroconf server name collision")
621
service.remove()
622
elif state == avahi.SERVER_RUNNING:
623
service.add()
624
625
626
def entry_group_state_changed(state, error):
627
"""Derived from the Avahi example code"""
628
logger.debug(u"Avahi state change: %i", state)
629
630
if state == avahi.ENTRY_GROUP_ESTABLISHED:
631
logger.debug(u"Zeroconf service established.")
632
elif state == avahi.ENTRY_GROUP_COLLISION:
633
logger.warning(u"Zeroconf service name collision.")
634
service.rename()
635
elif state == avahi.ENTRY_GROUP_FAILURE:
636
logger.critical(u"Avahi: Error in group state changed %s",
637
unicode(error))
638
raise AvahiGroupError("State changed: %s", str(error))
639
640
1588
def if_nametoindex(interface):
641
"""Call the C function if_nametoindex(), or equivalent"""
1589
"""Call the C function if_nametoindex(), or equivalent
1590
1591
Note: This function cannot accept a unicode string."""
642
1592
global if_nametoindex
643
1593
try:
644
if_nametoindex = ctypes.cdll.LoadLibrary\
645
(ctypes.util.find_library("c")).if_nametoindex
1594
if_nametoindex = (ctypes.cdll.LoadLibrary
1595
(ctypes.util.find_library(u"c"))
1596
.if_nametoindex)
646
1597
except (OSError, AttributeError):
647
if "struct" not in sys.modules:
648
import struct
649
if "fcntl" not in sys.modules:
650
import fcntl
1598
logger.warning(u"Doing if_nametoindex the hard way")
651
1599
def if_nametoindex(interface):
652
1600
"Get an interface index the hard way, i.e. using fcntl()"
653
1601
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
654
s = socket.socket()
655
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
656
struct.pack("16s16x", interface))
657
s.close()
658
interface_index = struct.unpack("I", ifreq[16:20])[0]
1602
with contextlib.closing(socket.socket()) as s:
1603
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1604
struct.pack(str(u"16s16x"),
1605
interface))
1606
interface_index = struct.unpack(str(u"I"),
1607
ifreq[16:20])[0]
659
1608
return interface_index
660
1609
return if_nametoindex(interface)
661
1610
662
1611
663
1612
def daemon(nochdir = False, noclose = False):
664
1613
"""See daemon(3). Standard BSD Unix function.
1614
665
1615
This should really exist as os.daemon, but it doesn't (yet)."""
666
1616
if os.fork():
667
1617
sys.exit()
668
1618
os.setsid()
669
1619
if not nochdir:
670
os.chdir("/")
1620
os.chdir(u"/")
671
1621
if os.fork():
672
1622
sys.exit()
673
1623
if not noclose:
675
1625
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
676
1626
if not stat.S_ISCHR(os.fstat(null).st_mode):
677
1627
raise OSError(errno.ENODEV,
678
"/dev/null not a character device")
1628
u"%s not a character device"
1629
% os.path.devnull)
679
1630
os.dup2(null, sys.stdin.fileno())
680
1631
os.dup2(null, sys.stdout.fileno())
681
1632
os.dup2(null, sys.stderr.fileno())
684
1635
685
1636
686
1637
def main():
687
parser = OptionParser(version = "%%prog %s" % version)
688
parser.add_option("-i", "--interface", type="string",
689
metavar="IF", help="Bind to interface IF")
690
parser.add_option("-a", "--address", type="string",
691
help="Address to listen for requests on")
692
parser.add_option("-p", "--port", type="int",
693
help="Port number to receive requests on")
694
parser.add_option("--check", action="store_true", default=False,
695
help="Run self-test")
696
parser.add_option("--debug", action="store_true",
697
help="Debug mode; run in foreground and log to"
698
" terminal")
699
parser.add_option("--priority", type="string", help="GnuTLS"
700
" priority string (see GnuTLS documentation)")
701
parser.add_option("--servicename", type="string", metavar="NAME",
702
help="Zeroconf service name")
703
parser.add_option("--configdir", type="string",
704
default="/etc/mandos", metavar="DIR",
705
help="Directory to search for configuration"
706
" files")
1638
1639
##################################################################
1640
# Parsing of options, both command line and config file
1641
1642
parser = optparse.OptionParser(version = "%%prog %s" % version)
1643
parser.add_option("-i", u"--interface", type=u"string",
1644
metavar="IF", help=u"Bind to interface IF")
1645
parser.add_option("-a", u"--address", type=u"string",
1646
help=u"Address to listen for requests on")
1647
parser.add_option("-p", u"--port", type=u"int",
1648
help=u"Port number to receive requests on")
1649
parser.add_option("--check", action=u"store_true",
1650
help=u"Run self-test")
1651
parser.add_option("--debug", action=u"store_true",
1652
help=u"Debug mode; run in foreground and log to"
1653
u" terminal")
1654
parser.add_option("--debuglevel", type=u"string", metavar="Level",
1655
help=u"Debug level for stdout output")
1656
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1657
u" priority string (see GnuTLS documentation)")
1658
parser.add_option("--servicename", type=u"string",
1659
metavar=u"NAME", help=u"Zeroconf service name")
1660
parser.add_option("--configdir", type=u"string",
1661
default=u"/etc/mandos", metavar=u"DIR",
1662
help=u"Directory to search for configuration"
1663
u" files")
1664
parser.add_option("--no-dbus", action=u"store_false",
1665
dest=u"use_dbus", help=u"Do not provide D-Bus"
1666
u" system bus interface")
1667
parser.add_option("--no-ipv6", action=u"store_false",
1668
dest=u"use_ipv6", help=u"Do not use IPv6")
707
1669
options = parser.parse_args()[0]
708
1670
709
1671
if options.check:
712
1674
sys.exit()
713
1675
714
1676
# Default values for config file for server-global settings
715
server_defaults = { "interface": "",
716
"address": "",
717
"port": "",
718
"debug": "False",
719
"priority":
720
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
721
"servicename": "Mandos",
1677
server_defaults = { u"interface": u"",
1678
u"address": u"",
1679
u"port": u"",
1680
u"debug": u"False",
1681
u"priority":
1682
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1683
u"servicename": u"Mandos",
1684
u"use_dbus": u"True",
1685
u"use_ipv6": u"True",
1686
u"debuglevel": u"",
722
1687
}
723
1688
724
1689
# Parse config file for server-global settings
725
server_config = ConfigParser.SafeConfigParser(server_defaults)
1690
server_config = configparser.SafeConfigParser(server_defaults)
726
1691
del server_defaults
727
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1692
server_config.read(os.path.join(options.configdir,
1693
u"mandos.conf"))
728
1694
# Convert the SafeConfigParser object to a dict
729
1695
server_settings = server_config.defaults()
730
# Use getboolean on the boolean config option
731
server_settings["debug"] = server_config.getboolean\
732
("DEFAULT", "debug")
1696
# Use the appropriate methods on the non-string config options
1697
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1698
server_settings[option] = server_config.getboolean(u"DEFAULT",
1699
option)
1700
if server_settings["port"]:
1701
server_settings["port"] = server_config.getint(u"DEFAULT",
1702
u"port")
733
1703
del server_config
734
1704
735
1705
# Override the settings from the config file with command line
736
1706
# options, if set.
737
for option in ("interface", "address", "port", "debug",
738
"priority", "servicename", "configdir"):
1707
for option in (u"interface", u"address", u"port", u"debug",
1708
u"priority", u"servicename", u"configdir",
1709
u"use_dbus", u"use_ipv6", u"debuglevel"):
739
1710
value = getattr(options, option)
740
1711
if value is not None:
741
1712
server_settings[option] = value
742
1713
del options
1714
# Force all strings to be unicode
1715
for option in server_settings.keys():
1716
if type(server_settings[option]) is str:
1717
server_settings[option] = unicode(server_settings[option])
743
1718
# Now we have our good server settings in "server_settings"
744
1719
745
debug = server_settings["debug"]
746
747
if not debug:
748
syslogger.setLevel(logging.WARNING)
749
console.setLevel(logging.WARNING)
750
751
if server_settings["servicename"] != "Mandos":
752
syslogger.setFormatter(logging.Formatter\
753
('Mandos (%s): %%(levelname)s:'
754
' %%(message)s'
755
% server_settings["servicename"]))
1720
##################################################################
1721
1722
# For convenience
1723
debug = server_settings[u"debug"]
1724
debuglevel = server_settings[u"debuglevel"]
1725
use_dbus = server_settings[u"use_dbus"]
1726
use_ipv6 = server_settings[u"use_ipv6"]
1727
1728
if server_settings[u"servicename"] != u"Mandos":
1729
syslogger.setFormatter(logging.Formatter
1730
(u'Mandos (%s) [%%(process)d]:'
1731
u' %%(levelname)s: %%(message)s'
1732
% server_settings[u"servicename"]))
756
1733
757
1734
# Parse config file with clients
758
client_defaults = { "timeout": "1h",
759
"interval": "5m",
760
"checker": "fping -q -- %(host)s",
761
"host": "",
1735
client_defaults = { u"timeout": u"1h",
1736
u"interval": u"5m",
1737
u"checker": u"fping -q -- %%(host)s",
1738
u"host": u"",
1739
u"approval_delay": u"0s",
1740
u"approval_duration": u"1s",
762
1741
}
763
client_config = ConfigParser.SafeConfigParser(client_defaults)
764
client_config.read(os.path.join(server_settings["configdir"],
765
"clients.conf"))
766
767
clients = Set()
768
tcp_server = IPv6_TCPServer((server_settings["address"],
769
server_settings["port"]),
770
TCP_handler,
771
settings=server_settings,
772
clients=clients)
773
pidfilename = "/var/run/mandos.pid"
774
try:
775
pidfile = open(pidfilename, "w")
776
except IOError, error:
777
logger.error("Could not open file %r", pidfilename)
778
779
uid = 65534
780
gid = 65534
781
try:
782
uid = pwd.getpwnam("mandos").pw_uid
783
except KeyError:
784
try:
785
uid = pwd.getpwnam("nobody").pw_uid
786
except KeyError:
787
pass
788
try:
789
gid = pwd.getpwnam("mandos").pw_gid
790
except KeyError:
791
try:
792
gid = pwd.getpwnam("nogroup").pw_gid
793
except KeyError:
794
pass
795
try:
1742
client_config = configparser.SafeConfigParser(client_defaults)
1743
client_config.read(os.path.join(server_settings[u"configdir"],
1744
u"clients.conf"))
1745
1746
global mandos_dbus_service
1747
mandos_dbus_service = None
1748
1749
tcp_server = MandosServer((server_settings[u"address"],
1750
server_settings[u"port"]),
1751
ClientHandler,
1752
interface=(server_settings[u"interface"]
1753
or None),
1754
use_ipv6=use_ipv6,
1755
gnutls_priority=
1756
server_settings[u"priority"],
1757
use_dbus=use_dbus)
1758
pidfilename = u"/var/run/mandos.pid"
1759
try:
1760
pidfile = open(pidfilename, u"w")
1761
except IOError:
1762
logger.error(u"Could not open file %r", pidfilename)
1763
1764
try:
1765
uid = pwd.getpwnam(u"_mandos").pw_uid
1766
gid = pwd.getpwnam(u"_mandos").pw_gid
1767
except KeyError:
1768
try:
1769
uid = pwd.getpwnam(u"mandos").pw_uid
1770
gid = pwd.getpwnam(u"mandos").pw_gid
1771
except KeyError:
1772
try:
1773
uid = pwd.getpwnam(u"nobody").pw_uid
1774
gid = pwd.getpwnam(u"nobody").pw_gid
1775
except KeyError:
1776
uid = 65534
1777
gid = 65534
1778
try:
1779
os.setgid(gid)
796
1780
os.setuid(uid)
797
os.setgid(gid)
798
1781
except OSError, error:
799
1782
if error[0] != errno.EPERM:
800
1783
raise error
801
1784
802
global service
803
service = AvahiService(name = server_settings["servicename"],
804
servicetype = "_mandos._tcp", )
805
if server_settings["interface"]:
806
service.interface = if_nametoindex\
807
(server_settings["interface"])
1785
if not debug and not debuglevel:
1786
syslogger.setLevel(logging.WARNING)
1787
console.setLevel(logging.WARNING)
1788
if debuglevel:
1789
level = getattr(logging, debuglevel.upper())
1790
syslogger.setLevel(level)
1791
console.setLevel(level)
1792
1793
if debug:
1794
# Enable all possible GnuTLS debugging
1795
1796
# "Use a log level over 10 to enable all debugging options."
1797
# - GnuTLS manual
1798
gnutls.library.functions.gnutls_global_set_log_level(11)
1799
1800
@gnutls.library.types.gnutls_log_func
1801
def debug_gnutls(level, string):
1802
logger.debug(u"GnuTLS: %s", string[:-1])
1803
1804
(gnutls.library.functions
1805
.gnutls_global_set_log_function(debug_gnutls))
1806
1807
# Redirect stdin so all checkers get /dev/null
1808
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1809
os.dup2(null, sys.stdin.fileno())
1810
if null > 2:
1811
os.close(null)
1812
else:
1813
# No console logging
1814
logger.removeHandler(console)
1815
808
1816
809
1817
global main_loop
810
global bus
811
global server
812
1818
# From the Avahi example code
813
1819
DBusGMainLoop(set_as_default=True )
814
1820
main_loop = gobject.MainLoop()
815
1821
bus = dbus.SystemBus()
816
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
817
avahi.DBUS_PATH_SERVER),
818
avahi.DBUS_INTERFACE_SERVER)
819
1822
# End of Avahi example code
820
821
def remove_from_clients(client):
822
clients.remove(client)
823
if not clients:
824
logger.critical(u"No clients left, exiting")
825
sys.exit()
826
827
clients.update(Set(Client(name = section,
828
stop_hook = remove_from_clients,
829
config
830
= dict(client_config.items(section)))
831
for section in client_config.sections()))
832
if not clients:
833
logger.critical(u"No clients defined")
834
sys.exit(1)
835
836
if debug:
837
# Redirect stdin so all checkers get /dev/null
838
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
839
os.dup2(null, sys.stdin.fileno())
840
if null > 2:
841
os.close(null)
842
else:
843
# No console logging
844
logger.removeHandler(console)
1823
if use_dbus:
1824
try:
1825
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1826
bus, do_not_queue=True)
1827
except dbus.exceptions.NameExistsException, e:
1828
logger.error(unicode(e) + u", disabling D-Bus")
1829
use_dbus = False
1830
server_settings[u"use_dbus"] = False
1831
tcp_server.use_dbus = False
1832
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1833
service = AvahiService(name = server_settings[u"servicename"],
1834
servicetype = u"_mandos._tcp",
1835
protocol = protocol, bus = bus)
1836
if server_settings["interface"]:
1837
service.interface = (if_nametoindex
1838
(str(server_settings[u"interface"])))
1839
1840
if not debug:
845
1841
# Close all input and output, do double fork, etc.
846
1842
daemon()
847
1843
1844
global multiprocessing_manager
1845
multiprocessing_manager = multiprocessing.Manager()
1846
1847
client_class = Client
1848
if use_dbus:
1849
client_class = functools.partial(ClientDBus, bus = bus)
1850
def client_config_items(config, section):
1851
special_settings = {
1852
"approved_by_default":
1853
lambda: config.getboolean(section,
1854
"approved_by_default"),
1855
}
1856
for name, value in config.items(section):
1857
try:
1858
yield (name, special_settings[name]())
1859
except KeyError:
1860
yield (name, value)
1861
1862
tcp_server.clients.update(set(
1863
client_class(name = section,
1864
config= dict(client_config_items(
1865
client_config, section)))
1866
for section in client_config.sections()))
1867
if not tcp_server.clients:
1868
logger.warning(u"No clients defined")
1869
848
1870
try:
849
pid = os.getpid()
850
pidfile.write(str(pid) + "\n")
851
pidfile.close()
1871
with pidfile:
1872
pid = os.getpid()
1873
pidfile.write(str(pid) + "\n")
852
1874
del pidfile
853
1875
except IOError:
854
1876
logger.error(u"Could not write to file %r with PID %d",
858
1880
pass
859
1881
del pidfilename
860
1882
1883
if not debug:
1884
signal.signal(signal.SIGINT, signal.SIG_IGN)
1885
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1886
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1887
1888
if use_dbus:
1889
class MandosDBusService(dbus.service.Object):
1890
"""A D-Bus proxy object"""
1891
def __init__(self):
1892
dbus.service.Object.__init__(self, bus, u"/")
1893
_interface = u"se.bsnet.fukt.Mandos"
1894
1895
@dbus.service.signal(_interface, signature=u"o")
1896
def ClientAdded(self, objpath):
1897
"D-Bus signal"
1898
pass
1899
1900
@dbus.service.signal(_interface, signature=u"ss")
1901
def ClientNotFound(self, fingerprint, address):
1902
"D-Bus signal"
1903
pass
1904
1905
@dbus.service.signal(_interface, signature=u"os")
1906
def ClientRemoved(self, objpath, name):
1907
"D-Bus signal"
1908
pass
1909
1910
@dbus.service.method(_interface, out_signature=u"ao")
1911
def GetAllClients(self):
1912
"D-Bus method"
1913
return dbus.Array(c.dbus_object_path
1914
for c in tcp_server.clients)
1915
1916
@dbus.service.method(_interface,
1917
out_signature=u"a{oa{sv}}")
1918
def GetAllClientsWithProperties(self):
1919
"D-Bus method"
1920
return dbus.Dictionary(
1921
((c.dbus_object_path, c.GetAll(u""))
1922
for c in tcp_server.clients),
1923
signature=u"oa{sv}")
1924
1925
@dbus.service.method(_interface, in_signature=u"o")
1926
def RemoveClient(self, object_path):
1927
"D-Bus method"
1928
for c in tcp_server.clients:
1929
if c.dbus_object_path == object_path:
1930
tcp_server.clients.remove(c)
1931
c.remove_from_connection()
1932
# Don't signal anything except ClientRemoved
1933
c.disable(quiet=True)
1934
# Emit D-Bus signal
1935
self.ClientRemoved(object_path, c.name)
1936
return
1937
raise KeyError(object_path)
1938
1939
del _interface
1940
1941
mandos_dbus_service = MandosDBusService()
1942
861
1943
def cleanup():
862
1944
"Cleanup function; run on exit"
863
global group
864
# From the Avahi example code
865
if not group is None:
866
group.Free()
867
group = None
868
# End of Avahi example code
1945
service.cleanup()
869
1946
870
while clients:
871
client = clients.pop()
872
client.stop_hook = None
873
client.stop()
1947
while tcp_server.clients:
1948
client = tcp_server.clients.pop()
1949
if use_dbus:
1950
client.remove_from_connection()
1951
client.disable_hook = None
1952
# Don't signal anything except ClientRemoved
1953
client.disable(quiet=True)
1954
if use_dbus:
1955
# Emit D-Bus signal
1956
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1957
client.name)
874
1958
875
1959
atexit.register(cleanup)
876
1960
877
if not debug:
878
signal.signal(signal.SIGINT, signal.SIG_IGN)
879
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
880
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
881
882
for client in clients:
883
client.start()
1961
for client in tcp_server.clients:
1962
if use_dbus:
1963
# Emit D-Bus signal
1964
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1965
client.enable()
884
1966
885
1967
tcp_server.enable()
886
1968
tcp_server.server_activate()
887
1969
888
1970
# Find out what port we got
889
1971
service.port = tcp_server.socket.getsockname()[1]
890
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
891
u" scope_id %d" % tcp_server.socket.getsockname())
1972
if use_ipv6:
1973
logger.info(u"Now listening on address %r, port %d,"
1974
" flowinfo %d, scope_id %d"
1975
% tcp_server.socket.getsockname())
1976
else: # IPv4
1977
logger.info(u"Now listening on address %r, port %d"
1978
% tcp_server.socket.getsockname())
892
1979
893
1980
#service.interface = tcp_server.socket.getsockname()[3]
894
1981
895
1982
try:
896
1983
# From the Avahi example code
897
server.connect_to_signal("StateChanged", server_state_changed)
898
1984
try:
899
server_state_changed(server.GetState())
1985
service.activate()
900
1986
except dbus.exceptions.DBusException, error:
901
1987
logger.critical(u"DBusException: %s", error)
1988
cleanup()
902
1989
sys.exit(1)
903
1990
# End of Avahi example code
904
1991
905
1992
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
906
1993
lambda *args, **kwargs:
907
tcp_server.handle_request\
908
(*args[2:], **kwargs) or True)
1994
(tcp_server.handle_request
1995
(*args[2:], **kwargs) or True))
909
1996
910
1997
logger.debug(u"Starting main loop")
911
1998
main_loop.run()
912
1999
except AvahiError, error:
913
logger.critical(u"AvahiError: %s" + unicode(error))
2000
logger.critical(u"AvahiError: %s", error)
2001
cleanup()
914
2002
sys.exit(1)
915
2003
except KeyboardInterrupt:
916
2004
if debug:
917
print
2005
print >> sys.stderr
2006
logger.debug(u"Server received KeyboardInterrupt")
2007
logger.debug(u"Server exiting")
2008
# Must run before the D-Bus bus name gets deregistered
2009
cleanup()
918
2010
919
2011
if __name__ == '__main__':
920
2012
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0