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- Committer: Teddy Hogeborn
- Date: 2010-09-25 23:52:17 UTC
- Revision ID: teddy@fukt.bsnet.se-20100925235217-4hhqfryz1ste6uw3
* mandos (ClientDBus.__init__): Bug fix: Translate "-" in client names
to "_" in D-Bus object paths.
(MandosServer.handle_ipc): Bug fix: Send only address string to
D-Bus signal, not whole tuple.
* mandos-ctl: New options "--approve-by-default", "--deny-by-default",
"--approval-delay", and "--approval-duration".
* mandos-ctl.xml (SYNOPSIS, OPTIONS): Document new options.
* mandos-monitor (MandosClientWidget.update): Fix spelling.
to "_" in D-Bus object paths.
(MandosServer.handle_ipc): Bug fix: Send only address string to
D-Bus signal, not whole tuple.
* mandos-ctl: New options "--approve-by-default", "--deny-by-default",
"--approval-delay", and "--approval-duration".
* mandos-ctl.xml (SYNOPSIS, OPTIONS): Document new options.
* mandos-monitor (MandosClientWidget.update): Fix spelling.
- files added:
- DBUS-API
- files removed:
- debian/mandos-client.config
- 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" 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
32
33
33
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
48
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
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import logging
56
56
import logging.handlers
57
57
import pwd
58
from contextlib import closing
58
import contextlib
59
import struct
60
import fcntl
61
import functools
62
import cPickle as pickle
63
import multiprocessing
59
64
60
65
import dbus
66
import dbus.service
61
67
import gobject
62
68
import avahi
63
69
from dbus.mainloop.glib import DBusGMainLoop
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70
import ctypes
65
71
import ctypes.util
66
67
version = "1.0.2"
68
69
logger = logging.Logger('mandos')
70
syslogger = logging.handlers.SysLogHandler\
71
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log")
73
syslogger.setFormatter(logging.Formatter\
74
('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
92
(u'Mandos [%(process)d]: %(levelname)s:'
93
u' %(message)s'))
75
94
logger.addHandler(syslogger)
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77
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console = logging.StreamHandler()
78
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
79
' %(message)s'))
97
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
98
u' %(levelname)s:'
99
u' %(message)s'))
80
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logger.addHandler(console)
81
101
82
102
class AvahiError(Exception):
83
def __init__(self, value):
103
def __init__(self, value, *args, **kwargs):
84
104
self.value = value
85
super(AvahiError, self).__init__()
86
def __str__(self):
87
return repr(self.value)
105
super(AvahiError, self).__init__(value, *args, **kwargs)
106
def __unicode__(self):
107
return unicode(repr(self.value))
88
108
89
109
class AvahiServiceError(AvahiError):
90
110
pass
95
115
96
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class AvahiService(object):
97
117
"""An Avahi (Zeroconf) service.
118
98
119
Attributes:
99
120
interface: integer; avahi.IF_UNSPEC or an interface index.
100
121
Used to optionally bind to the specified interface.
101
name: string; Example: 'Mandos'
102
type: string; Example: '_mandos._tcp'.
122
name: string; Example: u'Mandos'
123
type: string; Example: u'_mandos._tcp'.
103
124
See <http://www.dns-sd.org/ServiceTypes.html>
104
125
port: integer; what port to announce
105
126
TXT: list of strings; TXT record for the service
108
129
max_renames: integer; maximum number of renames
109
130
rename_count: integer; counter so we only rename after collisions
110
131
a sensible number of times
132
group: D-Bus Entry Group
133
server: D-Bus Server
134
bus: dbus.SystemBus()
111
135
"""
112
136
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
113
servicetype = None, port = None, TXT = None, domain = "",
114
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):
115
140
self.interface = interface
116
141
self.name = name
117
142
self.type = servicetype
118
143
self.port = port
119
if TXT is None:
120
self.TXT = []
121
else:
122
self.TXT = TXT
144
self.TXT = TXT if TXT is not None else []
123
145
self.domain = domain
124
146
self.host = host
125
147
self.rename_count = 0
126
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
127
153
def rename(self):
128
154
"""Derived from the Avahi example code"""
129
155
if self.rename_count >= self.max_renames:
130
156
logger.critical(u"No suitable Zeroconf service name found"
131
157
u" after %i retries, exiting.",
132
158
self.rename_count)
133
raise AvahiServiceError("Too many renames")
134
self.name = server.GetAlternativeServiceName(self.name)
159
raise AvahiServiceError(u"Too many renames")
160
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
135
161
logger.info(u"Changing Zeroconf service name to %r ...",
136
str(self.name))
137
syslogger.setFormatter(logging.Formatter\
138
('Mandos (%s): %%(levelname)s:'
139
' %%(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))
140
167
self.remove()
141
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)
142
174
self.rename_count += 1
143
175
def remove(self):
144
176
"""Derived from the Avahi example code"""
145
if group is not None:
146
group.Reset()
177
if self.group is not None:
178
self.group.Reset()
147
179
def add(self):
148
180
"""Derived from the Avahi example code"""
149
global group
150
if group is None:
151
group = dbus.Interface\
152
(bus.get_object(avahi.DBUS_NAME,
153
server.EntryGroupNew()),
154
avahi.DBUS_INTERFACE_ENTRY_GROUP)
155
group.connect_to_signal('StateChanged',
156
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)
157
189
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
158
service.name, service.type)
159
group.AddService(
160
self.interface, # interface
161
avahi.PROTO_INET6, # protocol
162
dbus.UInt32(0), # flags
163
self.name, self.type,
164
self.domain, self.host,
165
dbus.UInt16(self.port),
166
avahi.string_array_to_txt_array(self.TXT))
167
group.Commit()
168
169
# From the Avahi example code:
170
group = None # our entry group
171
# 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())
172
237
173
238
174
239
class Client(object):
175
240
"""A representation of a client host served by this server.
241
176
242
Attributes:
177
name: string; from the config file, used in log messages
178
fingerprint: string (40 or 32 hexadecimal digits); used to
179
uniquely identify the client
180
secret: bytestring; sent verbatim (over TLS) to client
181
host: string; available for use by the checker command
182
created: datetime.datetime(); object creation, not client host
183
last_checked_ok: datetime.datetime() or None if not yet checked OK
184
timeout: datetime.timedelta(); How long from last_checked_ok
185
until this client is invalid
186
interval: datetime.timedelta(); How often to start a new checker
187
stop_hook: If set, called by stop() as stop_hook(self)
188
checker: subprocess.Popen(); a running checker process used
189
to see if the client lives.
190
'None' if no process is running.
191
checker_initiator_tag: a gobject event source tag, or None
192
stop_initiator_tag: - '' -
243
_approved: bool(); 'None' if not yet approved/disapproved
244
approval_delay: datetime.timedelta(); Time to wait for approval
245
approval_duration: datetime.timedelta(); Duration of one approval
246
checker: subprocess.Popen(); a running checker process used
247
to see if the client lives.
248
'None' if no process is running.
193
249
checker_callback_tag: - '' -
194
checker_command: string; External command which is run to check if
195
client lives. %() expansions are done at
250
checker_command: string; External command which is run to check
251
if client lives. %() expansions are done at
196
252
runtime with vars(self) as dict, so that for
197
253
instance %(name)s can be used in the command.
198
Private attibutes:
199
_timeout: Real variable for 'timeout'
200
_interval: Real variable for 'interval'
201
_timeout_milliseconds: Used when calling gobject.timeout_add()
202
_interval_milliseconds: - '' -
254
checker_initiator_tag: a gobject event source tag, or None
255
created: datetime.datetime(); (UTC) object creation
256
current_checker_command: string; current running checker_command
257
disable_hook: If set, called by disable() as disable_hook(self)
258
disable_initiator_tag: - '' -
259
enabled: bool()
260
fingerprint: string (40 or 32 hexadecimal digits); used to
261
uniquely identify the client
262
host: string; available for use by the checker command
263
interval: datetime.timedelta(); How often to start a new checker
264
last_checked_ok: datetime.datetime(); (UTC) or None
265
last_enabled: datetime.datetime(); (UTC)
266
name: string; from the config file, used in log messages and
267
D-Bus identifiers
268
secret: bytestring; sent verbatim (over TLS) to client
269
timeout: datetime.timedelta(); How long from last_checked_ok
270
until this client is disabled
271
runtime_expansions: Allowed attributes for runtime expansion.
203
272
"""
204
def _set_timeout(self, timeout):
205
"Setter function for 'timeout' attribute"
206
self._timeout = timeout
207
self._timeout_milliseconds = ((self.timeout.days
208
* 24 * 60 * 60 * 1000)
209
+ (self.timeout.seconds * 1000)
210
+ (self.timeout.microseconds
211
// 1000))
212
timeout = property(lambda self: self._timeout,
213
_set_timeout)
214
del _set_timeout
215
def _set_interval(self, interval):
216
"Setter function for 'interval' attribute"
217
self._interval = interval
218
self._interval_milliseconds = ((self.interval.days
219
* 24 * 60 * 60 * 1000)
220
+ (self.interval.seconds
221
* 1000)
222
+ (self.interval.microseconds
223
// 1000))
224
interval = property(lambda self: self._interval,
225
_set_interval)
226
del _set_interval
227
def __init__(self, name = None, stop_hook=None, config=None):
273
274
runtime_expansions = (u"approval_delay", u"approval_duration",
275
u"created", u"enabled", u"fingerprint",
276
u"host", u"interval", u"last_checked_ok",
277
u"last_enabled", u"name", u"timeout")
278
279
@staticmethod
280
def _timedelta_to_milliseconds(td):
281
"Convert a datetime.timedelta() to milliseconds"
282
return ((td.days * 24 * 60 * 60 * 1000)
283
+ (td.seconds * 1000)
284
+ (td.microseconds // 1000))
285
286
def timeout_milliseconds(self):
287
"Return the 'timeout' attribute in milliseconds"
288
return self._timedelta_to_milliseconds(self.timeout)
289
290
def interval_milliseconds(self):
291
"Return the 'interval' attribute in milliseconds"
292
return self._timedelta_to_milliseconds(self.interval)
293
294
def approval_delay_milliseconds(self):
295
return self._timedelta_to_milliseconds(self.approval_delay)
296
297
def __init__(self, name = None, disable_hook=None, config=None):
228
298
"""Note: the 'checker' key in 'config' sets the
229
299
'checker_command' attribute and *not* the 'checker'
230
300
attribute."""
301
self.name = name
231
302
if config is None:
232
303
config = {}
233
self.name = name
234
304
logger.debug(u"Creating client %r", self.name)
235
305
# Uppercase and remove spaces from fingerprint for later
236
306
# comparison purposes with return value from the fingerprint()
237
307
# function
238
self.fingerprint = config["fingerprint"].upper()\
239
.replace(u" ", u"")
308
self.fingerprint = (config[u"fingerprint"].upper()
309
.replace(u" ", u""))
240
310
logger.debug(u" Fingerprint: %s", self.fingerprint)
241
if "secret" in config:
242
self.secret = config["secret"].decode(u"base64")
243
elif "secfile" in config:
244
with closing(open(os.path.expanduser
245
(os.path.expandvars
246
(config["secfile"])))) \
247
as secfile:
311
if u"secret" in config:
312
self.secret = config[u"secret"].decode(u"base64")
313
elif u"secfile" in config:
314
with open(os.path.expanduser(os.path.expandvars
315
(config[u"secfile"])),
316
"rb") as secfile:
248
317
self.secret = secfile.read()
249
318
else:
250
319
raise TypeError(u"No secret or secfile for client %s"
251
320
% self.name)
252
self.host = config.get("host", "")
253
self.created = datetime.datetime.now()
321
self.host = config.get(u"host", u"")
322
self.created = datetime.datetime.utcnow()
323
self.enabled = False
324
self.last_enabled = None
254
325
self.last_checked_ok = None
255
self.timeout = string_to_delta(config["timeout"])
256
self.interval = string_to_delta(config["interval"])
257
self.stop_hook = stop_hook
326
self.timeout = string_to_delta(config[u"timeout"])
327
self.interval = string_to_delta(config[u"interval"])
328
self.disable_hook = disable_hook
258
329
self.checker = None
259
330
self.checker_initiator_tag = None
260
self.stop_initiator_tag = None
331
self.disable_initiator_tag = None
261
332
self.checker_callback_tag = None
262
self.check_command = config["checker"]
263
def start(self):
333
self.checker_command = config[u"checker"]
334
self.current_checker_command = None
335
self.last_connect = None
336
self._approved = None
337
self.approved_by_default = config.get(u"approved_by_default",
338
True)
339
self.approvals_pending = 0
340
self.approval_delay = string_to_delta(
341
config[u"approval_delay"])
342
self.approval_duration = string_to_delta(
343
config[u"approval_duration"])
344
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
345
346
def send_changedstate(self):
347
self.changedstate.acquire()
348
self.changedstate.notify_all()
349
self.changedstate.release()
350
351
def enable(self):
264
352
"""Start this client's checker and timeout hooks"""
353
if getattr(self, u"enabled", False):
354
# Already enabled
355
return
356
self.send_changedstate()
357
self.last_enabled = datetime.datetime.utcnow()
265
358
# Schedule a new checker to be started an 'interval' from now,
266
359
# and every interval from then on.
267
self.checker_initiator_tag = gobject.timeout_add\
268
(self._interval_milliseconds,
269
self.start_checker)
360
self.checker_initiator_tag = (gobject.timeout_add
361
(self.interval_milliseconds(),
362
self.start_checker))
363
# Schedule a disable() when 'timeout' has passed
364
self.disable_initiator_tag = (gobject.timeout_add
365
(self.timeout_milliseconds(),
366
self.disable))
367
self.enabled = True
270
368
# Also start a new checker *right now*.
271
369
self.start_checker()
272
# Schedule a stop() when 'timeout' has passed
273
self.stop_initiator_tag = gobject.timeout_add\
274
(self._timeout_milliseconds,
275
self.stop)
276
def stop(self):
277
"""Stop this client.
278
The possibility that a client might be restarted is left open,
279
but not currently used."""
280
# If this client doesn't have a secret, it is already stopped.
281
if hasattr(self, "secret") and self.secret:
282
logger.info(u"Stopping client %s", self.name)
283
self.secret = None
284
else:
370
371
def disable(self, quiet=True):
372
"""Disable this client."""
373
if not getattr(self, "enabled", False):
285
374
return False
286
if getattr(self, "stop_initiator_tag", False):
287
gobject.source_remove(self.stop_initiator_tag)
288
self.stop_initiator_tag = None
289
if getattr(self, "checker_initiator_tag", False):
375
if not quiet:
376
self.send_changedstate()
377
if not quiet:
378
logger.info(u"Disabling client %s", self.name)
379
if getattr(self, u"disable_initiator_tag", False):
380
gobject.source_remove(self.disable_initiator_tag)
381
self.disable_initiator_tag = None
382
if getattr(self, u"checker_initiator_tag", False):
290
383
gobject.source_remove(self.checker_initiator_tag)
291
384
self.checker_initiator_tag = None
292
385
self.stop_checker()
293
if self.stop_hook:
294
self.stop_hook(self)
386
if self.disable_hook:
387
self.disable_hook(self)
388
self.enabled = False
295
389
# Do not run this again if called by a gobject.timeout_add
296
390
return False
391
297
392
def __del__(self):
298
self.stop_hook = None
299
self.stop()
300
def checker_callback(self, pid, condition):
393
self.disable_hook = None
394
self.disable()
395
396
def checker_callback(self, pid, condition, command):
301
397
"""The checker has completed, so take appropriate actions."""
302
398
self.checker_callback_tag = None
303
399
self.checker = None
304
if os.WIFEXITED(condition) \
305
and (os.WEXITSTATUS(condition) == 0):
306
logger.info(u"Checker for %(name)s succeeded",
307
vars(self))
308
self.bump_timeout()
309
elif not os.WIFEXITED(condition):
400
if os.WIFEXITED(condition):
401
exitstatus = os.WEXITSTATUS(condition)
402
if exitstatus == 0:
403
logger.info(u"Checker for %(name)s succeeded",
404
vars(self))
405
self.checked_ok()
406
else:
407
logger.info(u"Checker for %(name)s failed",
408
vars(self))
409
else:
310
410
logger.warning(u"Checker for %(name)s crashed?",
311
411
vars(self))
312
else:
313
logger.info(u"Checker for %(name)s failed",
314
vars(self))
315
def bump_timeout(self):
412
413
def checked_ok(self):
316
414
"""Bump up the timeout for this client.
415
317
416
This should only be called when the client has been seen,
318
417
alive and well.
319
418
"""
320
self.last_checked_ok = datetime.datetime.now()
321
gobject.source_remove(self.stop_initiator_tag)
322
self.stop_initiator_tag = gobject.timeout_add\
323
(self._timeout_milliseconds, self.stop)
419
self.last_checked_ok = datetime.datetime.utcnow()
420
gobject.source_remove(self.disable_initiator_tag)
421
self.disable_initiator_tag = (gobject.timeout_add
422
(self.timeout_milliseconds(),
423
self.disable))
424
324
425
def start_checker(self):
325
426
"""Start a new checker subprocess if one is not running.
427
326
428
If a checker already exists, leave it running and do
327
429
nothing."""
328
430
# The reason for not killing a running checker is that if we
331
433
# client would inevitably timeout, since no checker would get
332
434
# a chance to run to completion. If we instead leave running
333
435
# checkers alone, the checker would have to take more time
334
# than 'timeout' for the client to be declared invalid, which
335
# is as it should be.
436
# than 'timeout' for the client to be disabled, which is as it
437
# should be.
438
439
# If a checker exists, make sure it is not a zombie
440
try:
441
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
442
except (AttributeError, OSError), error:
443
if (isinstance(error, OSError)
444
and error.errno != errno.ECHILD):
445
raise error
446
else:
447
if pid:
448
logger.warning(u"Checker was a zombie")
449
gobject.source_remove(self.checker_callback_tag)
450
self.checker_callback(pid, status,
451
self.current_checker_command)
452
# Start a new checker if needed
336
453
if self.checker is None:
337
454
try:
338
# In case check_command has exactly one % operator
339
command = self.check_command % self.host
455
# In case checker_command has exactly one % operator
456
command = self.checker_command % self.host
340
457
except TypeError:
341
458
# Escape attributes for the shell
342
escaped_attrs = dict((key, re.escape(str(val)))
343
for key, val in
344
vars(self).iteritems())
459
escaped_attrs = dict(
460
(attr,
461
re.escape(unicode(str(getattr(self, attr, u"")),
462
errors=
463
u'replace')))
464
for attr in
465
self.runtime_expansions)
466
345
467
try:
346
command = self.check_command % escaped_attrs
468
command = self.checker_command % escaped_attrs
347
469
except TypeError, error:
348
470
logger.error(u'Could not format string "%s":'
349
u' %s', self.check_command, error)
471
u' %s', self.checker_command, error)
350
472
return True # Try again later
473
self.current_checker_command = command
351
474
try:
352
475
logger.info(u"Starting checker %r for %s",
353
476
command, self.name)
357
480
# always replaced by /dev/null.)
358
481
self.checker = subprocess.Popen(command,
359
482
close_fds=True,
360
shell=True, cwd="/")
361
self.checker_callback_tag = gobject.child_watch_add\
362
(self.checker.pid,
363
self.checker_callback)
483
shell=True, cwd=u"/")
484
self.checker_callback_tag = (gobject.child_watch_add
485
(self.checker.pid,
486
self.checker_callback,
487
data=command))
488
# The checker may have completed before the gobject
489
# watch was added. Check for this.
490
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
491
if pid:
492
gobject.source_remove(self.checker_callback_tag)
493
self.checker_callback(pid, status, command)
364
494
except OSError, error:
365
495
logger.error(u"Failed to start subprocess: %s",
366
496
error)
367
497
# Re-run this periodically if run by gobject.timeout_add
368
498
return True
499
369
500
def stop_checker(self):
370
501
"""Force the checker process, if any, to stop."""
371
502
if self.checker_callback_tag:
372
503
gobject.source_remove(self.checker_callback_tag)
373
504
self.checker_callback_tag = None
374
if getattr(self, "checker", None) is None:
505
if getattr(self, u"checker", None) is None:
375
506
return
376
507
logger.debug(u"Stopping checker for %(name)s", vars(self))
377
508
try:
378
509
os.kill(self.checker.pid, signal.SIGTERM)
379
#os.sleep(0.5)
510
#time.sleep(0.5)
380
511
#if self.checker.poll() is None:
381
512
# os.kill(self.checker.pid, signal.SIGKILL)
382
513
except OSError, error:
383
514
if error.errno != errno.ESRCH: # No such process
384
515
raise
385
516
self.checker = None
386
def still_valid(self):
387
"""Has the timeout not yet passed for this client?"""
388
now = datetime.datetime.now()
517
518
def dbus_service_property(dbus_interface, signature=u"v",
519
access=u"readwrite", byte_arrays=False):
520
"""Decorators for marking methods of a DBusObjectWithProperties to
521
become properties on the D-Bus.
522
523
The decorated method will be called with no arguments by "Get"
524
and with one argument by "Set".
525
526
The parameters, where they are supported, are the same as
527
dbus.service.method, except there is only "signature", since the
528
type from Get() and the type sent to Set() is the same.
529
"""
530
# Encoding deeply encoded byte arrays is not supported yet by the
531
# "Set" method, so we fail early here:
532
if byte_arrays and signature != u"ay":
533
raise ValueError(u"Byte arrays not supported for non-'ay'"
534
u" signature %r" % signature)
535
def decorator(func):
536
func._dbus_is_property = True
537
func._dbus_interface = dbus_interface
538
func._dbus_signature = signature
539
func._dbus_access = access
540
func._dbus_name = func.__name__
541
if func._dbus_name.endswith(u"_dbus_property"):
542
func._dbus_name = func._dbus_name[:-14]
543
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
544
return func
545
return decorator
546
547
548
class DBusPropertyException(dbus.exceptions.DBusException):
549
"""A base class for D-Bus property-related exceptions
550
"""
551
def __unicode__(self):
552
return unicode(str(self))
553
554
555
class DBusPropertyAccessException(DBusPropertyException):
556
"""A property's access permissions disallows an operation.
557
"""
558
pass
559
560
561
class DBusPropertyNotFound(DBusPropertyException):
562
"""An attempt was made to access a non-existing property.
563
"""
564
pass
565
566
567
class DBusObjectWithProperties(dbus.service.Object):
568
"""A D-Bus object with properties.
569
570
Classes inheriting from this can use the dbus_service_property
571
decorator to expose methods as D-Bus properties. It exposes the
572
standard Get(), Set(), and GetAll() methods on the D-Bus.
573
"""
574
575
@staticmethod
576
def _is_dbus_property(obj):
577
return getattr(obj, u"_dbus_is_property", False)
578
579
def _get_all_dbus_properties(self):
580
"""Returns a generator of (name, attribute) pairs
581
"""
582
return ((prop._dbus_name, prop)
583
for name, prop in
584
inspect.getmembers(self, self._is_dbus_property))
585
586
def _get_dbus_property(self, interface_name, property_name):
587
"""Returns a bound method if one exists which is a D-Bus
588
property with the specified name and interface.
589
"""
590
for name in (property_name,
591
property_name + u"_dbus_property"):
592
prop = getattr(self, name, None)
593
if (prop is None
594
or not self._is_dbus_property(prop)
595
or prop._dbus_name != property_name
596
or (interface_name and prop._dbus_interface
597
and interface_name != prop._dbus_interface)):
598
continue
599
return prop
600
# No such property
601
raise DBusPropertyNotFound(self.dbus_object_path + u":"
602
+ interface_name + u"."
603
+ property_name)
604
605
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
606
out_signature=u"v")
607
def Get(self, interface_name, property_name):
608
"""Standard D-Bus property Get() method, see D-Bus standard.
609
"""
610
prop = self._get_dbus_property(interface_name, property_name)
611
if prop._dbus_access == u"write":
612
raise DBusPropertyAccessException(property_name)
613
value = prop()
614
if not hasattr(value, u"variant_level"):
615
return value
616
return type(value)(value, variant_level=value.variant_level+1)
617
618
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
619
def Set(self, interface_name, property_name, value):
620
"""Standard D-Bus property Set() method, see D-Bus standard.
621
"""
622
prop = self._get_dbus_property(interface_name, property_name)
623
if prop._dbus_access == u"read":
624
raise DBusPropertyAccessException(property_name)
625
if prop._dbus_get_args_options[u"byte_arrays"]:
626
# The byte_arrays option is not supported yet on
627
# signatures other than "ay".
628
if prop._dbus_signature != u"ay":
629
raise ValueError
630
value = dbus.ByteArray(''.join(unichr(byte)
631
for byte in value))
632
prop(value)
633
634
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
635
out_signature=u"a{sv}")
636
def GetAll(self, interface_name):
637
"""Standard D-Bus property GetAll() method, see D-Bus
638
standard.
639
640
Note: Will not include properties with access="write".
641
"""
642
all = {}
643
for name, prop in self._get_all_dbus_properties():
644
if (interface_name
645
and interface_name != prop._dbus_interface):
646
# Interface non-empty but did not match
647
continue
648
# Ignore write-only properties
649
if prop._dbus_access == u"write":
650
continue
651
value = prop()
652
if not hasattr(value, u"variant_level"):
653
all[name] = value
654
continue
655
all[name] = type(value)(value, variant_level=
656
value.variant_level+1)
657
return dbus.Dictionary(all, signature=u"sv")
658
659
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
660
out_signature=u"s",
661
path_keyword='object_path',
662
connection_keyword='connection')
663
def Introspect(self, object_path, connection):
664
"""Standard D-Bus method, overloaded to insert property tags.
665
"""
666
xmlstring = dbus.service.Object.Introspect(self, object_path,
667
connection)
668
try:
669
document = xml.dom.minidom.parseString(xmlstring)
670
def make_tag(document, name, prop):
671
e = document.createElement(u"property")
672
e.setAttribute(u"name", name)
673
e.setAttribute(u"type", prop._dbus_signature)
674
e.setAttribute(u"access", prop._dbus_access)
675
return e
676
for if_tag in document.getElementsByTagName(u"interface"):
677
for tag in (make_tag(document, name, prop)
678
for name, prop
679
in self._get_all_dbus_properties()
680
if prop._dbus_interface
681
== if_tag.getAttribute(u"name")):
682
if_tag.appendChild(tag)
683
# Add the names to the return values for the
684
# "org.freedesktop.DBus.Properties" methods
685
if (if_tag.getAttribute(u"name")
686
== u"org.freedesktop.DBus.Properties"):
687
for cn in if_tag.getElementsByTagName(u"method"):
688
if cn.getAttribute(u"name") == u"Get":
689
for arg in cn.getElementsByTagName(u"arg"):
690
if (arg.getAttribute(u"direction")
691
== u"out"):
692
arg.setAttribute(u"name", u"value")
693
elif cn.getAttribute(u"name") == u"GetAll":
694
for arg in cn.getElementsByTagName(u"arg"):
695
if (arg.getAttribute(u"direction")
696
== u"out"):
697
arg.setAttribute(u"name", u"props")
698
xmlstring = document.toxml(u"utf-8")
699
document.unlink()
700
except (AttributeError, xml.dom.DOMException,
701
xml.parsers.expat.ExpatError), error:
702
logger.error(u"Failed to override Introspection method",
703
error)
704
return xmlstring
705
706
707
class ClientDBus(Client, DBusObjectWithProperties):
708
"""A Client class using D-Bus
709
710
Attributes:
711
dbus_object_path: dbus.ObjectPath
712
bus: dbus.SystemBus()
713
"""
714
715
runtime_expansions = (Client.runtime_expansions
716
+ (u"dbus_object_path",))
717
718
# dbus.service.Object doesn't use super(), so we can't either.
719
720
def __init__(self, bus = None, *args, **kwargs):
721
self._approvals_pending = 0
722
self.bus = bus
723
Client.__init__(self, *args, **kwargs)
724
# Only now, when this client is initialized, can it show up on
725
# the D-Bus
726
client_object_name = unicode(self.name).translate(
727
{ord(u"."): ord(u"_"),
728
ord(u"-"): ord(u"_")})
729
self.dbus_object_path = (dbus.ObjectPath
730
(u"/clients/" + client_object_name))
731
DBusObjectWithProperties.__init__(self, self.bus,
732
self.dbus_object_path)
733
734
def _get_approvals_pending(self):
735
return self._approvals_pending
736
def _set_approvals_pending(self, value):
737
old_value = self._approvals_pending
738
self._approvals_pending = value
739
bval = bool(value)
740
if (hasattr(self, "dbus_object_path")
741
and bval is not bool(old_value)):
742
dbus_bool = dbus.Boolean(bval, variant_level=1)
743
self.PropertyChanged(dbus.String(u"ApprovalPending"),
744
dbus_bool)
745
746
approvals_pending = property(_get_approvals_pending,
747
_set_approvals_pending)
748
del _get_approvals_pending, _set_approvals_pending
749
750
@staticmethod
751
def _datetime_to_dbus(dt, variant_level=0):
752
"""Convert a UTC datetime.datetime() to a D-Bus type."""
753
return dbus.String(dt.isoformat(),
754
variant_level=variant_level)
755
756
def enable(self):
757
oldstate = getattr(self, u"enabled", False)
758
r = Client.enable(self)
759
if oldstate != self.enabled:
760
# Emit D-Bus signals
761
self.PropertyChanged(dbus.String(u"Enabled"),
762
dbus.Boolean(True, variant_level=1))
763
self.PropertyChanged(
764
dbus.String(u"LastEnabled"),
765
self._datetime_to_dbus(self.last_enabled,
766
variant_level=1))
767
return r
768
769
def disable(self, quiet = False):
770
oldstate = getattr(self, u"enabled", False)
771
r = Client.disable(self, quiet=quiet)
772
if not quiet and oldstate != self.enabled:
773
# Emit D-Bus signal
774
self.PropertyChanged(dbus.String(u"Enabled"),
775
dbus.Boolean(False, variant_level=1))
776
return r
777
778
def __del__(self, *args, **kwargs):
779
try:
780
self.remove_from_connection()
781
except LookupError:
782
pass
783
if hasattr(DBusObjectWithProperties, u"__del__"):
784
DBusObjectWithProperties.__del__(self, *args, **kwargs)
785
Client.__del__(self, *args, **kwargs)
786
787
def checker_callback(self, pid, condition, command,
788
*args, **kwargs):
789
self.checker_callback_tag = None
790
self.checker = None
791
# Emit D-Bus signal
792
self.PropertyChanged(dbus.String(u"CheckerRunning"),
793
dbus.Boolean(False, variant_level=1))
794
if os.WIFEXITED(condition):
795
exitstatus = os.WEXITSTATUS(condition)
796
# Emit D-Bus signal
797
self.CheckerCompleted(dbus.Int16(exitstatus),
798
dbus.Int64(condition),
799
dbus.String(command))
800
else:
801
# Emit D-Bus signal
802
self.CheckerCompleted(dbus.Int16(-1),
803
dbus.Int64(condition),
804
dbus.String(command))
805
806
return Client.checker_callback(self, pid, condition, command,
807
*args, **kwargs)
808
809
def checked_ok(self, *args, **kwargs):
810
r = Client.checked_ok(self, *args, **kwargs)
811
# Emit D-Bus signal
812
self.PropertyChanged(
813
dbus.String(u"LastCheckedOK"),
814
(self._datetime_to_dbus(self.last_checked_ok,
815
variant_level=1)))
816
return r
817
818
def start_checker(self, *args, **kwargs):
819
old_checker = self.checker
820
if self.checker is not None:
821
old_checker_pid = self.checker.pid
822
else:
823
old_checker_pid = None
824
r = Client.start_checker(self, *args, **kwargs)
825
# Only if new checker process was started
826
if (self.checker is not None
827
and old_checker_pid != self.checker.pid):
828
# Emit D-Bus signal
829
self.CheckerStarted(self.current_checker_command)
830
self.PropertyChanged(
831
dbus.String(u"CheckerRunning"),
832
dbus.Boolean(True, variant_level=1))
833
return r
834
835
def stop_checker(self, *args, **kwargs):
836
old_checker = getattr(self, u"checker", None)
837
r = Client.stop_checker(self, *args, **kwargs)
838
if (old_checker is not None
839
and getattr(self, u"checker", None) is None):
840
self.PropertyChanged(dbus.String(u"CheckerRunning"),
841
dbus.Boolean(False, variant_level=1))
842
return r
843
844
def _reset_approved(self):
845
self._approved = None
846
return False
847
848
def approve(self, value=True):
849
self.send_changedstate()
850
self._approved = value
851
gobject.timeout_add(self._timedelta_to_milliseconds
852
(self.approval_duration),
853
self._reset_approved)
854
855
856
## D-Bus methods, signals & properties
857
_interface = u"se.bsnet.fukt.Mandos.Client"
858
859
## Signals
860
861
# CheckerCompleted - signal
862
@dbus.service.signal(_interface, signature=u"nxs")
863
def CheckerCompleted(self, exitcode, waitstatus, command):
864
"D-Bus signal"
865
pass
866
867
# CheckerStarted - signal
868
@dbus.service.signal(_interface, signature=u"s")
869
def CheckerStarted(self, command):
870
"D-Bus signal"
871
pass
872
873
# PropertyChanged - signal
874
@dbus.service.signal(_interface, signature=u"sv")
875
def PropertyChanged(self, property, value):
876
"D-Bus signal"
877
pass
878
879
# GotSecret - signal
880
@dbus.service.signal(_interface)
881
def GotSecret(self):
882
"""D-Bus signal
883
Is sent after a successful transfer of secret from the Mandos
884
server to mandos-client
885
"""
886
pass
887
888
# Rejected - signal
889
@dbus.service.signal(_interface, signature=u"s")
890
def Rejected(self, reason):
891
"D-Bus signal"
892
pass
893
894
# NeedApproval - signal
895
@dbus.service.signal(_interface, signature=u"tb")
896
def NeedApproval(self, timeout, default):
897
"D-Bus signal"
898
pass
899
900
## Methods
901
902
# Approve - method
903
@dbus.service.method(_interface, in_signature=u"b")
904
def Approve(self, value):
905
self.approve(value)
906
907
# CheckedOK - method
908
@dbus.service.method(_interface)
909
def CheckedOK(self):
910
return self.checked_ok()
911
912
# Enable - method
913
@dbus.service.method(_interface)
914
def Enable(self):
915
"D-Bus method"
916
self.enable()
917
918
# StartChecker - method
919
@dbus.service.method(_interface)
920
def StartChecker(self):
921
"D-Bus method"
922
self.start_checker()
923
924
# Disable - method
925
@dbus.service.method(_interface)
926
def Disable(self):
927
"D-Bus method"
928
self.disable()
929
930
# StopChecker - method
931
@dbus.service.method(_interface)
932
def StopChecker(self):
933
self.stop_checker()
934
935
## Properties
936
937
# ApprovalPending - property
938
@dbus_service_property(_interface, signature=u"b", access=u"read")
939
def ApprovalPending_dbus_property(self):
940
return dbus.Boolean(bool(self.approvals_pending))
941
942
# ApprovedByDefault - property
943
@dbus_service_property(_interface, signature=u"b",
944
access=u"readwrite")
945
def ApprovedByDefault_dbus_property(self, value=None):
946
if value is None: # get
947
return dbus.Boolean(self.approved_by_default)
948
self.approved_by_default = bool(value)
949
# Emit D-Bus signal
950
self.PropertyChanged(dbus.String(u"ApprovedByDefault"),
951
dbus.Boolean(value, variant_level=1))
952
953
# ApprovalDelay - property
954
@dbus_service_property(_interface, signature=u"t",
955
access=u"readwrite")
956
def ApprovalDelay_dbus_property(self, value=None):
957
if value is None: # get
958
return dbus.UInt64(self.approval_delay_milliseconds())
959
self.approval_delay = datetime.timedelta(0, 0, 0, value)
960
# Emit D-Bus signal
961
self.PropertyChanged(dbus.String(u"ApprovalDelay"),
962
dbus.UInt64(value, variant_level=1))
963
964
# ApprovalDuration - property
965
@dbus_service_property(_interface, signature=u"t",
966
access=u"readwrite")
967
def ApprovalDuration_dbus_property(self, value=None):
968
if value is None: # get
969
return dbus.UInt64(self._timedelta_to_milliseconds(
970
self.approval_duration))
971
self.approval_duration = datetime.timedelta(0, 0, 0, value)
972
# Emit D-Bus signal
973
self.PropertyChanged(dbus.String(u"ApprovalDuration"),
974
dbus.UInt64(value, variant_level=1))
975
976
# Name - property
977
@dbus_service_property(_interface, signature=u"s", access=u"read")
978
def Name_dbus_property(self):
979
return dbus.String(self.name)
980
981
# Fingerprint - property
982
@dbus_service_property(_interface, signature=u"s", access=u"read")
983
def Fingerprint_dbus_property(self):
984
return dbus.String(self.fingerprint)
985
986
# Host - property
987
@dbus_service_property(_interface, signature=u"s",
988
access=u"readwrite")
989
def Host_dbus_property(self, value=None):
990
if value is None: # get
991
return dbus.String(self.host)
992
self.host = value
993
# Emit D-Bus signal
994
self.PropertyChanged(dbus.String(u"Host"),
995
dbus.String(value, variant_level=1))
996
997
# Created - property
998
@dbus_service_property(_interface, signature=u"s", access=u"read")
999
def Created_dbus_property(self):
1000
return dbus.String(self._datetime_to_dbus(self.created))
1001
1002
# LastEnabled - property
1003
@dbus_service_property(_interface, signature=u"s", access=u"read")
1004
def LastEnabled_dbus_property(self):
1005
if self.last_enabled is None:
1006
return dbus.String(u"")
1007
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1008
1009
# Enabled - property
1010
@dbus_service_property(_interface, signature=u"b",
1011
access=u"readwrite")
1012
def Enabled_dbus_property(self, value=None):
1013
if value is None: # get
1014
return dbus.Boolean(self.enabled)
1015
if value:
1016
self.enable()
1017
else:
1018
self.disable()
1019
1020
# LastCheckedOK - property
1021
@dbus_service_property(_interface, signature=u"s",
1022
access=u"readwrite")
1023
def LastCheckedOK_dbus_property(self, value=None):
1024
if value is not None:
1025
self.checked_ok()
1026
return
389
1027
if self.last_checked_ok is None:
390
return now < (self.created + self.timeout)
391
else:
392
return now < (self.last_checked_ok + self.timeout)
393
394
395
def peer_certificate(session):
396
"Return the peer's OpenPGP certificate as a bytestring"
397
# If not an OpenPGP certificate...
398
if gnutls.library.functions.gnutls_certificate_type_get\
399
(session._c_object) \
400
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
401
# ...do the normal thing
402
return session.peer_certificate
403
list_size = ctypes.c_uint()
404
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
405
(session._c_object, ctypes.byref(list_size))
406
if list_size.value == 0:
407
return None
408
cert = cert_list[0]
409
return ctypes.string_at(cert.data, cert.size)
410
411
412
def fingerprint(openpgp):
413
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
414
# New GnuTLS "datum" with the OpenPGP public key
415
datum = gnutls.library.types.gnutls_datum_t\
416
(ctypes.cast(ctypes.c_char_p(openpgp),
417
ctypes.POINTER(ctypes.c_ubyte)),
418
ctypes.c_uint(len(openpgp)))
419
# New empty GnuTLS certificate
420
crt = gnutls.library.types.gnutls_openpgp_crt_t()
421
gnutls.library.functions.gnutls_openpgp_crt_init\
422
(ctypes.byref(crt))
423
# Import the OpenPGP public key into the certificate
424
gnutls.library.functions.gnutls_openpgp_crt_import\
425
(crt, ctypes.byref(datum),
426
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
427
# Verify the self signature in the key
428
crtverify = ctypes.c_uint()
429
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
430
(crt, 0, ctypes.byref(crtverify))
431
if crtverify.value != 0:
432
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
433
raise gnutls.errors.CertificateSecurityError("Verify failed")
434
# New buffer for the fingerprint
435
buf = ctypes.create_string_buffer(20)
436
buf_len = ctypes.c_size_t()
437
# Get the fingerprint from the certificate into the buffer
438
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
439
(crt, ctypes.byref(buf), ctypes.byref(buf_len))
440
# Deinit the certificate
441
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
442
# Convert the buffer to a Python bytestring
443
fpr = ctypes.string_at(buf, buf_len.value)
444
# Convert the bytestring to hexadecimal notation
445
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
446
return hex_fpr
447
448
449
class TCP_handler(SocketServer.BaseRequestHandler, object):
450
"""A TCP request handler class.
451
Instantiated by IPv6_TCPServer for each request to handle it.
1028
return dbus.String(u"")
1029
return dbus.String(self._datetime_to_dbus(self
1030
.last_checked_ok))
1031
1032
# Timeout - property
1033
@dbus_service_property(_interface, signature=u"t",
1034
access=u"readwrite")
1035
def Timeout_dbus_property(self, value=None):
1036
if value is None: # get
1037
return dbus.UInt64(self.timeout_milliseconds())
1038
self.timeout = datetime.timedelta(0, 0, 0, value)
1039
# Emit D-Bus signal
1040
self.PropertyChanged(dbus.String(u"Timeout"),
1041
dbus.UInt64(value, variant_level=1))
1042
if getattr(self, u"disable_initiator_tag", None) is None:
1043
return
1044
# Reschedule timeout
1045
gobject.source_remove(self.disable_initiator_tag)
1046
self.disable_initiator_tag = None
1047
time_to_die = (self.
1048
_timedelta_to_milliseconds((self
1049
.last_checked_ok
1050
+ self.timeout)
1051
- datetime.datetime
1052
.utcnow()))
1053
if time_to_die <= 0:
1054
# The timeout has passed
1055
self.disable()
1056
else:
1057
self.disable_initiator_tag = (gobject.timeout_add
1058
(time_to_die, self.disable))
1059
1060
# Interval - property
1061
@dbus_service_property(_interface, signature=u"t",
1062
access=u"readwrite")
1063
def Interval_dbus_property(self, value=None):
1064
if value is None: # get
1065
return dbus.UInt64(self.interval_milliseconds())
1066
self.interval = datetime.timedelta(0, 0, 0, value)
1067
# Emit D-Bus signal
1068
self.PropertyChanged(dbus.String(u"Interval"),
1069
dbus.UInt64(value, variant_level=1))
1070
if getattr(self, u"checker_initiator_tag", None) is None:
1071
return
1072
# Reschedule checker run
1073
gobject.source_remove(self.checker_initiator_tag)
1074
self.checker_initiator_tag = (gobject.timeout_add
1075
(value, self.start_checker))
1076
self.start_checker() # Start one now, too
1077
1078
# Checker - property
1079
@dbus_service_property(_interface, signature=u"s",
1080
access=u"readwrite")
1081
def Checker_dbus_property(self, value=None):
1082
if value is None: # get
1083
return dbus.String(self.checker_command)
1084
self.checker_command = value
1085
# Emit D-Bus signal
1086
self.PropertyChanged(dbus.String(u"Checker"),
1087
dbus.String(self.checker_command,
1088
variant_level=1))
1089
1090
# CheckerRunning - property
1091
@dbus_service_property(_interface, signature=u"b",
1092
access=u"readwrite")
1093
def CheckerRunning_dbus_property(self, value=None):
1094
if value is None: # get
1095
return dbus.Boolean(self.checker is not None)
1096
if value:
1097
self.start_checker()
1098
else:
1099
self.stop_checker()
1100
1101
# ObjectPath - property
1102
@dbus_service_property(_interface, signature=u"o", access=u"read")
1103
def ObjectPath_dbus_property(self):
1104
return self.dbus_object_path # is already a dbus.ObjectPath
1105
1106
# Secret = property
1107
@dbus_service_property(_interface, signature=u"ay",
1108
access=u"write", byte_arrays=True)
1109
def Secret_dbus_property(self, value):
1110
self.secret = str(value)
1111
1112
del _interface
1113
1114
1115
class ProxyClient(object):
1116
def __init__(self, child_pipe, fpr, address):
1117
self._pipe = child_pipe
1118
self._pipe.send(('init', fpr, address))
1119
if not self._pipe.recv():
1120
raise KeyError()
1121
1122
def __getattribute__(self, name):
1123
if(name == '_pipe'):
1124
return super(ProxyClient, self).__getattribute__(name)
1125
self._pipe.send(('getattr', name))
1126
data = self._pipe.recv()
1127
if data[0] == 'data':
1128
return data[1]
1129
if data[0] == 'function':
1130
def func(*args, **kwargs):
1131
self._pipe.send(('funcall', name, args, kwargs))
1132
return self._pipe.recv()[1]
1133
return func
1134
1135
def __setattr__(self, name, value):
1136
if(name == '_pipe'):
1137
return super(ProxyClient, self).__setattr__(name, value)
1138
self._pipe.send(('setattr', name, value))
1139
1140
1141
class ClientHandler(socketserver.BaseRequestHandler, object):
1142
"""A class to handle client connections.
1143
1144
Instantiated once for each connection to handle it.
452
1145
Note: This will run in its own forked process."""
453
1146
454
1147
def handle(self):
455
logger.info(u"TCP connection from: %s",
456
unicode(self.client_address))
457
session = gnutls.connection.ClientSession\
458
(self.request, gnutls.connection.X509Credentials())
459
460
line = self.request.makefile().readline()
461
logger.debug(u"Protocol version: %r", line)
462
try:
463
if int(line.strip().split()[0]) > 1:
464
raise RuntimeError
465
except (ValueError, IndexError, RuntimeError), error:
466
logger.error(u"Unknown protocol version: %s", error)
467
return
468
469
# Note: gnutls.connection.X509Credentials is really a generic
470
# GnuTLS certificate credentials object so long as no X.509
471
# keys are added to it. Therefore, we can use it here despite
472
# using OpenPGP certificates.
473
474
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
475
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
476
# "+DHE-DSS"))
477
# Use a fallback default, since this MUST be set.
478
priority = self.server.settings.get("priority", "NORMAL")
479
gnutls.library.functions.gnutls_priority_set_direct\
480
(session._c_object, priority, None)
481
482
try:
483
session.handshake()
484
except gnutls.errors.GNUTLSError, error:
485
logger.warning(u"Handshake failed: %s", error)
486
# Do not run session.bye() here: the session is not
487
# established. Just abandon the request.
488
return
489
try:
490
fpr = fingerprint(peer_certificate(session))
491
except (TypeError, gnutls.errors.GNUTLSError), error:
492
logger.warning(u"Bad certificate: %s", error)
493
session.bye()
494
return
495
logger.debug(u"Fingerprint: %s", fpr)
496
client = None
497
for c in self.server.clients:
498
if c.fingerprint == fpr:
499
client = c
500
break
501
if not client:
502
logger.warning(u"Client not found for fingerprint: %s",
503
fpr)
504
session.bye()
505
return
506
# Have to check if client.still_valid(), since it is possible
507
# that the client timed out while establishing the GnuTLS
508
# session.
509
if not client.still_valid():
510
logger.warning(u"Client %(name)s is invalid",
511
vars(client))
512
session.bye()
513
return
514
## This won't work here, since we're in a fork.
515
# client.bump_timeout()
516
sent_size = 0
517
while sent_size < len(client.secret):
518
sent = session.send(client.secret[sent_size:])
519
logger.debug(u"Sent: %d, remaining: %d",
520
sent, len(client.secret)
521
- (sent_size + sent))
522
sent_size += sent
523
session.bye()
524
525
526
class IPv6_TCPServer(SocketServer.ForkingMixIn,
527
SocketServer.TCPServer, object):
528
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1148
with contextlib.closing(self.server.child_pipe) as child_pipe:
1149
logger.info(u"TCP connection from: %s",
1150
unicode(self.client_address))
1151
logger.debug(u"Pipe FD: %d",
1152
self.server.child_pipe.fileno())
1153
1154
session = (gnutls.connection
1155
.ClientSession(self.request,
1156
gnutls.connection
1157
.X509Credentials()))
1158
1159
# Note: gnutls.connection.X509Credentials is really a
1160
# generic GnuTLS certificate credentials object so long as
1161
# no X.509 keys are added to it. Therefore, we can use it
1162
# here despite using OpenPGP certificates.
1163
1164
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1165
# u"+AES-256-CBC", u"+SHA1",
1166
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1167
# u"+DHE-DSS"))
1168
# Use a fallback default, since this MUST be set.
1169
priority = self.server.gnutls_priority
1170
if priority is None:
1171
priority = u"NORMAL"
1172
(gnutls.library.functions
1173
.gnutls_priority_set_direct(session._c_object,
1174
priority, None))
1175
1176
# Start communication using the Mandos protocol
1177
# Get protocol number
1178
line = self.request.makefile().readline()
1179
logger.debug(u"Protocol version: %r", line)
1180
try:
1181
if int(line.strip().split()[0]) > 1:
1182
raise RuntimeError
1183
except (ValueError, IndexError, RuntimeError), error:
1184
logger.error(u"Unknown protocol version: %s", error)
1185
return
1186
1187
# Start GnuTLS connection
1188
try:
1189
session.handshake()
1190
except gnutls.errors.GNUTLSError, error:
1191
logger.warning(u"Handshake failed: %s", error)
1192
# Do not run session.bye() here: the session is not
1193
# established. Just abandon the request.
1194
return
1195
logger.debug(u"Handshake succeeded")
1196
1197
approval_required = False
1198
try:
1199
try:
1200
fpr = self.fingerprint(self.peer_certificate
1201
(session))
1202
except (TypeError, gnutls.errors.GNUTLSError), error:
1203
logger.warning(u"Bad certificate: %s", error)
1204
return
1205
logger.debug(u"Fingerprint: %s", fpr)
1206
1207
try:
1208
client = ProxyClient(child_pipe, fpr,
1209
self.client_address)
1210
except KeyError:
1211
return
1212
1213
if client.approval_delay:
1214
delay = client.approval_delay
1215
client.approvals_pending += 1
1216
approval_required = True
1217
1218
while True:
1219
if not client.enabled:
1220
logger.warning(u"Client %s is disabled",
1221
client.name)
1222
if self.server.use_dbus:
1223
# Emit D-Bus signal
1224
client.Rejected("Disabled")
1225
return
1226
1227
if client._approved or not client.approval_delay:
1228
#We are approved or approval is disabled
1229
break
1230
elif client._approved is None:
1231
logger.info(u"Client %s needs approval",
1232
client.name)
1233
if self.server.use_dbus:
1234
# Emit D-Bus signal
1235
client.NeedApproval(
1236
client.approval_delay_milliseconds(),
1237
client.approved_by_default)
1238
else:
1239
logger.warning(u"Client %s was not approved",
1240
client.name)
1241
if self.server.use_dbus:
1242
# Emit D-Bus signal
1243
client.Rejected("Denied")
1244
return
1245
1246
#wait until timeout or approved
1247
#x = float(client._timedelta_to_milliseconds(delay))
1248
time = datetime.datetime.now()
1249
client.changedstate.acquire()
1250
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1251
client.changedstate.release()
1252
time2 = datetime.datetime.now()
1253
if (time2 - time) >= delay:
1254
if not client.approved_by_default:
1255
logger.warning("Client %s timed out while"
1256
" waiting for approval",
1257
client.name)
1258
if self.server.use_dbus:
1259
# Emit D-Bus signal
1260
client.Rejected("Approval timed out")
1261
return
1262
else:
1263
break
1264
else:
1265
delay -= time2 - time
1266
1267
sent_size = 0
1268
while sent_size < len(client.secret):
1269
try:
1270
sent = session.send(client.secret[sent_size:])
1271
except (gnutls.errors.GNUTLSError), error:
1272
logger.warning("gnutls send failed")
1273
return
1274
logger.debug(u"Sent: %d, remaining: %d",
1275
sent, len(client.secret)
1276
- (sent_size + sent))
1277
sent_size += sent
1278
1279
logger.info(u"Sending secret to %s", client.name)
1280
# bump the timeout as if seen
1281
client.checked_ok()
1282
if self.server.use_dbus:
1283
# Emit D-Bus signal
1284
client.GotSecret()
1285
1286
finally:
1287
if approval_required:
1288
client.approvals_pending -= 1
1289
try:
1290
session.bye()
1291
except (gnutls.errors.GNUTLSError), error:
1292
logger.warning("GnuTLS bye failed")
1293
1294
@staticmethod
1295
def peer_certificate(session):
1296
"Return the peer's OpenPGP certificate as a bytestring"
1297
# If not an OpenPGP certificate...
1298
if (gnutls.library.functions
1299
.gnutls_certificate_type_get(session._c_object)
1300
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1301
# ...do the normal thing
1302
return session.peer_certificate
1303
list_size = ctypes.c_uint(1)
1304
cert_list = (gnutls.library.functions
1305
.gnutls_certificate_get_peers
1306
(session._c_object, ctypes.byref(list_size)))
1307
if not bool(cert_list) and list_size.value != 0:
1308
raise gnutls.errors.GNUTLSError(u"error getting peer"
1309
u" certificate")
1310
if list_size.value == 0:
1311
return None
1312
cert = cert_list[0]
1313
return ctypes.string_at(cert.data, cert.size)
1314
1315
@staticmethod
1316
def fingerprint(openpgp):
1317
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1318
# New GnuTLS "datum" with the OpenPGP public key
1319
datum = (gnutls.library.types
1320
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1321
ctypes.POINTER
1322
(ctypes.c_ubyte)),
1323
ctypes.c_uint(len(openpgp))))
1324
# New empty GnuTLS certificate
1325
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1326
(gnutls.library.functions
1327
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1328
# Import the OpenPGP public key into the certificate
1329
(gnutls.library.functions
1330
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1331
gnutls.library.constants
1332
.GNUTLS_OPENPGP_FMT_RAW))
1333
# Verify the self signature in the key
1334
crtverify = ctypes.c_uint()
1335
(gnutls.library.functions
1336
.gnutls_openpgp_crt_verify_self(crt, 0,
1337
ctypes.byref(crtverify)))
1338
if crtverify.value != 0:
1339
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1340
raise (gnutls.errors.CertificateSecurityError
1341
(u"Verify failed"))
1342
# New buffer for the fingerprint
1343
buf = ctypes.create_string_buffer(20)
1344
buf_len = ctypes.c_size_t()
1345
# Get the fingerprint from the certificate into the buffer
1346
(gnutls.library.functions
1347
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1348
ctypes.byref(buf_len)))
1349
# Deinit the certificate
1350
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1351
# Convert the buffer to a Python bytestring
1352
fpr = ctypes.string_at(buf, buf_len.value)
1353
# Convert the bytestring to hexadecimal notation
1354
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1355
return hex_fpr
1356
1357
1358
class MultiprocessingMixIn(object):
1359
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1360
def sub_process_main(self, request, address):
1361
try:
1362
self.finish_request(request, address)
1363
except:
1364
self.handle_error(request, address)
1365
self.close_request(request)
1366
1367
def process_request(self, request, address):
1368
"""Start a new process to process the request."""
1369
multiprocessing.Process(target = self.sub_process_main,
1370
args = (request, address)).start()
1371
1372
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1373
""" adds a pipe to the MixIn """
1374
def process_request(self, request, client_address):
1375
"""Overrides and wraps the original process_request().
1376
1377
This function creates a new pipe in self.pipe
1378
"""
1379
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1380
1381
super(MultiprocessingMixInWithPipe,
1382
self).process_request(request, client_address)
1383
self.child_pipe.close()
1384
self.add_pipe(parent_pipe)
1385
1386
def add_pipe(self, parent_pipe):
1387
"""Dummy function; override as necessary"""
1388
pass
1389
1390
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1391
socketserver.TCPServer, object):
1392
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1393
529
1394
Attributes:
530
settings: Server settings
531
clients: Set() of Client objects
532
1395
enabled: Boolean; whether this server is activated yet
1396
interface: None or a network interface name (string)
1397
use_ipv6: Boolean; to use IPv6 or not
533
1398
"""
534
address_family = socket.AF_INET6
535
def __init__(self, *args, **kwargs):
536
if "settings" in kwargs:
537
self.settings = kwargs["settings"]
538
del kwargs["settings"]
539
if "clients" in kwargs:
540
self.clients = kwargs["clients"]
541
del kwargs["clients"]
542
self.enabled = False
543
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1399
def __init__(self, server_address, RequestHandlerClass,
1400
interface=None, use_ipv6=True):
1401
self.interface = interface
1402
if use_ipv6:
1403
self.address_family = socket.AF_INET6
1404
socketserver.TCPServer.__init__(self, server_address,
1405
RequestHandlerClass)
544
1406
def server_bind(self):
545
1407
"""This overrides the normal server_bind() function
546
1408
to bind to an interface if one was specified, and also NOT to
547
1409
bind to an address or port if they were not specified."""
548
if self.settings["interface"]:
549
# 25 is from /usr/include/asm-i486/socket.h
550
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
551
try:
552
self.socket.setsockopt(socket.SOL_SOCKET,
553
SO_BINDTODEVICE,
554
self.settings["interface"])
555
except socket.error, error:
556
if error[0] == errno.EPERM:
557
logger.error(u"No permission to"
558
u" bind to interface %s",
559
self.settings["interface"])
560
else:
561
raise error
1410
if self.interface is not None:
1411
if SO_BINDTODEVICE is None:
1412
logger.error(u"SO_BINDTODEVICE does not exist;"
1413
u" cannot bind to interface %s",
1414
self.interface)
1415
else:
1416
try:
1417
self.socket.setsockopt(socket.SOL_SOCKET,
1418
SO_BINDTODEVICE,
1419
str(self.interface
1420
+ u'\0'))
1421
except socket.error, error:
1422
if error[0] == errno.EPERM:
1423
logger.error(u"No permission to"
1424
u" bind to interface %s",
1425
self.interface)
1426
elif error[0] == errno.ENOPROTOOPT:
1427
logger.error(u"SO_BINDTODEVICE not available;"
1428
u" cannot bind to interface %s",
1429
self.interface)
1430
else:
1431
raise
562
1432
# Only bind(2) the socket if we really need to.
563
1433
if self.server_address[0] or self.server_address[1]:
564
1434
if not self.server_address[0]:
565
in6addr_any = "::"
566
self.server_address = (in6addr_any,
1435
if self.address_family == socket.AF_INET6:
1436
any_address = u"::" # in6addr_any
1437
else:
1438
any_address = socket.INADDR_ANY
1439
self.server_address = (any_address,
567
1440
self.server_address[1])
568
1441
elif not self.server_address[1]:
569
1442
self.server_address = (self.server_address[0],
570
1443
0)
571
# if self.settings["interface"]:
1444
# if self.interface:
572
1445
# self.server_address = (self.server_address[0],
573
1446
# 0, # port
574
1447
# 0, # flowinfo
575
1448
# if_nametoindex
576
# (self.settings
577
# ["interface"]))
578
return super(IPv6_TCPServer, self).server_bind()
1449
# (self.interface))
1450
return socketserver.TCPServer.server_bind(self)
1451
1452
1453
class MandosServer(IPv6_TCPServer):
1454
"""Mandos server.
1455
1456
Attributes:
1457
clients: set of Client objects
1458
gnutls_priority GnuTLS priority string
1459
use_dbus: Boolean; to emit D-Bus signals or not
1460
1461
Assumes a gobject.MainLoop event loop.
1462
"""
1463
def __init__(self, server_address, RequestHandlerClass,
1464
interface=None, use_ipv6=True, clients=None,
1465
gnutls_priority=None, use_dbus=True):
1466
self.enabled = False
1467
self.clients = clients
1468
if self.clients is None:
1469
self.clients = set()
1470
self.use_dbus = use_dbus
1471
self.gnutls_priority = gnutls_priority
1472
IPv6_TCPServer.__init__(self, server_address,
1473
RequestHandlerClass,
1474
interface = interface,
1475
use_ipv6 = use_ipv6)
579
1476
def server_activate(self):
580
1477
if self.enabled:
581
return super(IPv6_TCPServer, self).server_activate()
1478
return socketserver.TCPServer.server_activate(self)
582
1479
def enable(self):
583
1480
self.enabled = True
1481
def add_pipe(self, parent_pipe):
1482
# Call "handle_ipc" for both data and EOF events
1483
gobject.io_add_watch(parent_pipe.fileno(),
1484
gobject.IO_IN | gobject.IO_HUP,
1485
functools.partial(self.handle_ipc,
1486
parent_pipe = parent_pipe))
1487
1488
def handle_ipc(self, source, condition, parent_pipe=None,
1489
client_object=None):
1490
condition_names = {
1491
gobject.IO_IN: u"IN", # There is data to read.
1492
gobject.IO_OUT: u"OUT", # Data can be written (without
1493
# blocking).
1494
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1495
gobject.IO_ERR: u"ERR", # Error condition.
1496
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1497
# broken, usually for pipes and
1498
# sockets).
1499
}
1500
conditions_string = ' | '.join(name
1501
for cond, name in
1502
condition_names.iteritems()
1503
if cond & condition)
1504
# error or the other end of multiprocessing.Pipe has closed
1505
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1506
return False
1507
1508
# Read a request from the child
1509
request = parent_pipe.recv()
1510
command = request[0]
1511
1512
if command == 'init':
1513
fpr = request[1]
1514
address = request[2]
1515
1516
for c in self.clients:
1517
if c.fingerprint == fpr:
1518
client = c
1519
break
1520
else:
1521
logger.warning(u"Client not found for fingerprint: %s, ad"
1522
u"dress: %s", fpr, address)
1523
if self.use_dbus:
1524
# Emit D-Bus signal
1525
mandos_dbus_service.ClientNotFound(fpr, address[0])
1526
parent_pipe.send(False)
1527
return False
1528
1529
gobject.io_add_watch(parent_pipe.fileno(),
1530
gobject.IO_IN | gobject.IO_HUP,
1531
functools.partial(self.handle_ipc,
1532
parent_pipe = parent_pipe,
1533
client_object = client))
1534
parent_pipe.send(True)
1535
# remove the old hook in favor of the new above hook on same fileno
1536
return False
1537
if command == 'funcall':
1538
funcname = request[1]
1539
args = request[2]
1540
kwargs = request[3]
1541
1542
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1543
1544
if command == 'getattr':
1545
attrname = request[1]
1546
if callable(client_object.__getattribute__(attrname)):
1547
parent_pipe.send(('function',))
1548
else:
1549
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1550
1551
if command == 'setattr':
1552
attrname = request[1]
1553
value = request[2]
1554
setattr(client_object, attrname, value)
1555
1556
return True
584
1557
585
1558
586
1559
def string_to_delta(interval):
587
1560
"""Parse a string and return a datetime.timedelta
588
589
>>> string_to_delta('7d')
1561
1562
>>> string_to_delta(u'7d')
590
1563
datetime.timedelta(7)
591
>>> string_to_delta('60s')
1564
>>> string_to_delta(u'60s')
592
1565
datetime.timedelta(0, 60)
593
>>> string_to_delta('60m')
1566
>>> string_to_delta(u'60m')
594
1567
datetime.timedelta(0, 3600)
595
>>> string_to_delta('24h')
1568
>>> string_to_delta(u'24h')
596
1569
datetime.timedelta(1)
597
1570
>>> string_to_delta(u'1w')
598
1571
datetime.timedelta(7)
599
>>> string_to_delta('5m 30s')
1572
>>> string_to_delta(u'5m 30s')
600
1573
datetime.timedelta(0, 330)
601
1574
"""
602
1575
timevalue = datetime.timedelta(0)
615
1588
elif suffix == u"w":
616
1589
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
617
1590
else:
618
raise ValueError
619
except (ValueError, IndexError):
620
raise ValueError
1591
raise ValueError(u"Unknown suffix %r" % suffix)
1592
except (ValueError, IndexError), e:
1593
raise ValueError(e.message)
621
1594
timevalue += delta
622
1595
return timevalue
623
1596
624
1597
625
def server_state_changed(state):
626
"""Derived from the Avahi example code"""
627
if state == avahi.SERVER_COLLISION:
628
logger.error(u"Zeroconf server name collision")
629
service.remove()
630
elif state == avahi.SERVER_RUNNING:
631
service.add()
632
633
634
def entry_group_state_changed(state, error):
635
"""Derived from the Avahi example code"""
636
logger.debug(u"Avahi state change: %i", state)
637
638
if state == avahi.ENTRY_GROUP_ESTABLISHED:
639
logger.debug(u"Zeroconf service established.")
640
elif state == avahi.ENTRY_GROUP_COLLISION:
641
logger.warning(u"Zeroconf service name collision.")
642
service.rename()
643
elif state == avahi.ENTRY_GROUP_FAILURE:
644
logger.critical(u"Avahi: Error in group state changed %s",
645
unicode(error))
646
raise AvahiGroupError("State changed: %s", str(error))
647
648
1598
def if_nametoindex(interface):
649
"""Call the C function if_nametoindex(), or equivalent"""
1599
"""Call the C function if_nametoindex(), or equivalent
1600
1601
Note: This function cannot accept a unicode string."""
650
1602
global if_nametoindex
651
1603
try:
652
if_nametoindex = ctypes.cdll.LoadLibrary\
653
(ctypes.util.find_library("c")).if_nametoindex
1604
if_nametoindex = (ctypes.cdll.LoadLibrary
1605
(ctypes.util.find_library(u"c"))
1606
.if_nametoindex)
654
1607
except (OSError, AttributeError):
655
if "struct" not in sys.modules:
656
import struct
657
if "fcntl" not in sys.modules:
658
import fcntl
1608
logger.warning(u"Doing if_nametoindex the hard way")
659
1609
def if_nametoindex(interface):
660
1610
"Get an interface index the hard way, i.e. using fcntl()"
661
1611
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
662
with closing(socket.socket()) as s:
1612
with contextlib.closing(socket.socket()) as s:
663
1613
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
664
struct.pack("16s16x", interface))
665
interface_index = struct.unpack("I", ifreq[16:20])[0]
1614
struct.pack(str(u"16s16x"),
1615
interface))
1616
interface_index = struct.unpack(str(u"I"),
1617
ifreq[16:20])[0]
666
1618
return interface_index
667
1619
return if_nametoindex(interface)
668
1620
669
1621
670
1622
def daemon(nochdir = False, noclose = False):
671
1623
"""See daemon(3). Standard BSD Unix function.
1624
672
1625
This should really exist as os.daemon, but it doesn't (yet)."""
673
1626
if os.fork():
674
1627
sys.exit()
675
1628
os.setsid()
676
1629
if not nochdir:
677
os.chdir("/")
1630
os.chdir(u"/")
678
1631
if os.fork():
679
1632
sys.exit()
680
1633
if not noclose:
682
1635
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
683
1636
if not stat.S_ISCHR(os.fstat(null).st_mode):
684
1637
raise OSError(errno.ENODEV,
685
"/dev/null not a character device")
1638
u"%s not a character device"
1639
% os.path.devnull)
686
1640
os.dup2(null, sys.stdin.fileno())
687
1641
os.dup2(null, sys.stdout.fileno())
688
1642
os.dup2(null, sys.stderr.fileno())
691
1645
692
1646
693
1647
def main():
694
parser = OptionParser(version = "%%prog %s" % version)
695
parser.add_option("-i", "--interface", type="string",
696
metavar="IF", help="Bind to interface IF")
697
parser.add_option("-a", "--address", type="string",
698
help="Address to listen for requests on")
699
parser.add_option("-p", "--port", type="int",
700
help="Port number to receive requests on")
701
parser.add_option("--check", action="store_true", default=False,
702
help="Run self-test")
703
parser.add_option("--debug", action="store_true",
704
help="Debug mode; run in foreground and log to"
705
" terminal")
706
parser.add_option("--priority", type="string", help="GnuTLS"
707
" priority string (see GnuTLS documentation)")
708
parser.add_option("--servicename", type="string", metavar="NAME",
709
help="Zeroconf service name")
710
parser.add_option("--configdir", type="string",
711
default="/etc/mandos", metavar="DIR",
712
help="Directory to search for configuration"
713
" files")
1648
1649
##################################################################
1650
# Parsing of options, both command line and config file
1651
1652
parser = optparse.OptionParser(version = "%%prog %s" % version)
1653
parser.add_option("-i", u"--interface", type=u"string",
1654
metavar="IF", help=u"Bind to interface IF")
1655
parser.add_option("-a", u"--address", type=u"string",
1656
help=u"Address to listen for requests on")
1657
parser.add_option("-p", u"--port", type=u"int",
1658
help=u"Port number to receive requests on")
1659
parser.add_option("--check", action=u"store_true",
1660
help=u"Run self-test")
1661
parser.add_option("--debug", action=u"store_true",
1662
help=u"Debug mode; run in foreground and log to"
1663
u" terminal")
1664
parser.add_option("--debuglevel", type=u"string", metavar="Level",
1665
help=u"Debug level for stdout output")
1666
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1667
u" priority string (see GnuTLS documentation)")
1668
parser.add_option("--servicename", type=u"string",
1669
metavar=u"NAME", help=u"Zeroconf service name")
1670
parser.add_option("--configdir", type=u"string",
1671
default=u"/etc/mandos", metavar=u"DIR",
1672
help=u"Directory to search for configuration"
1673
u" files")
1674
parser.add_option("--no-dbus", action=u"store_false",
1675
dest=u"use_dbus", help=u"Do not provide D-Bus"
1676
u" system bus interface")
1677
parser.add_option("--no-ipv6", action=u"store_false",
1678
dest=u"use_ipv6", help=u"Do not use IPv6")
714
1679
options = parser.parse_args()[0]
715
1680
716
1681
if options.check:
719
1684
sys.exit()
720
1685
721
1686
# Default values for config file for server-global settings
722
server_defaults = { "interface": "",
723
"address": "",
724
"port": "",
725
"debug": "False",
726
"priority":
727
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
728
"servicename": "Mandos",
1687
server_defaults = { u"interface": u"",
1688
u"address": u"",
1689
u"port": u"",
1690
u"debug": u"False",
1691
u"priority":
1692
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1693
u"servicename": u"Mandos",
1694
u"use_dbus": u"True",
1695
u"use_ipv6": u"True",
1696
u"debuglevel": u"",
729
1697
}
730
1698
731
1699
# Parse config file for server-global settings
732
server_config = ConfigParser.SafeConfigParser(server_defaults)
1700
server_config = configparser.SafeConfigParser(server_defaults)
733
1701
del server_defaults
734
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1702
server_config.read(os.path.join(options.configdir,
1703
u"mandos.conf"))
735
1704
# Convert the SafeConfigParser object to a dict
736
1705
server_settings = server_config.defaults()
737
# Use getboolean on the boolean config option
738
server_settings["debug"] = server_config.getboolean\
739
("DEFAULT", "debug")
1706
# Use the appropriate methods on the non-string config options
1707
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1708
server_settings[option] = server_config.getboolean(u"DEFAULT",
1709
option)
1710
if server_settings["port"]:
1711
server_settings["port"] = server_config.getint(u"DEFAULT",
1712
u"port")
740
1713
del server_config
741
1714
742
1715
# Override the settings from the config file with command line
743
1716
# options, if set.
744
for option in ("interface", "address", "port", "debug",
745
"priority", "servicename", "configdir"):
1717
for option in (u"interface", u"address", u"port", u"debug",
1718
u"priority", u"servicename", u"configdir",
1719
u"use_dbus", u"use_ipv6", u"debuglevel"):
746
1720
value = getattr(options, option)
747
1721
if value is not None:
748
1722
server_settings[option] = value
749
1723
del options
1724
# Force all strings to be unicode
1725
for option in server_settings.keys():
1726
if type(server_settings[option]) is str:
1727
server_settings[option] = unicode(server_settings[option])
750
1728
# Now we have our good server settings in "server_settings"
751
1729
752
debug = server_settings["debug"]
753
754
if not debug:
755
syslogger.setLevel(logging.WARNING)
756
console.setLevel(logging.WARNING)
757
758
if server_settings["servicename"] != "Mandos":
759
syslogger.setFormatter(logging.Formatter\
760
('Mandos (%s): %%(levelname)s:'
761
' %%(message)s'
762
% server_settings["servicename"]))
1730
##################################################################
1731
1732
# For convenience
1733
debug = server_settings[u"debug"]
1734
debuglevel = server_settings[u"debuglevel"]
1735
use_dbus = server_settings[u"use_dbus"]
1736
use_ipv6 = server_settings[u"use_ipv6"]
1737
1738
if server_settings[u"servicename"] != u"Mandos":
1739
syslogger.setFormatter(logging.Formatter
1740
(u'Mandos (%s) [%%(process)d]:'
1741
u' %%(levelname)s: %%(message)s'
1742
% server_settings[u"servicename"]))
763
1743
764
1744
# Parse config file with clients
765
client_defaults = { "timeout": "1h",
766
"interval": "5m",
767
"checker": "fping -q -- %(host)s",
768
"host": "",
1745
client_defaults = { u"timeout": u"1h",
1746
u"interval": u"5m",
1747
u"checker": u"fping -q -- %%(host)s",
1748
u"host": u"",
1749
u"approval_delay": u"0s",
1750
u"approval_duration": u"1s",
769
1751
}
770
client_config = ConfigParser.SafeConfigParser(client_defaults)
771
client_config.read(os.path.join(server_settings["configdir"],
772
"clients.conf"))
773
774
clients = Set()
775
tcp_server = IPv6_TCPServer((server_settings["address"],
776
server_settings["port"]),
777
TCP_handler,
778
settings=server_settings,
779
clients=clients)
780
pidfilename = "/var/run/mandos.pid"
781
try:
782
pidfile = open(pidfilename, "w")
783
except IOError, error:
784
logger.error("Could not open file %r", pidfilename)
785
786
uid = 65534
787
gid = 65534
788
try:
789
uid = pwd.getpwnam("mandos").pw_uid
790
except KeyError:
791
try:
792
uid = pwd.getpwnam("nobody").pw_uid
793
except KeyError:
794
pass
795
try:
796
gid = pwd.getpwnam("mandos").pw_gid
797
except KeyError:
798
try:
799
gid = pwd.getpwnam("nogroup").pw_gid
800
except KeyError:
801
pass
802
try:
1752
client_config = configparser.SafeConfigParser(client_defaults)
1753
client_config.read(os.path.join(server_settings[u"configdir"],
1754
u"clients.conf"))
1755
1756
global mandos_dbus_service
1757
mandos_dbus_service = None
1758
1759
tcp_server = MandosServer((server_settings[u"address"],
1760
server_settings[u"port"]),
1761
ClientHandler,
1762
interface=(server_settings[u"interface"]
1763
or None),
1764
use_ipv6=use_ipv6,
1765
gnutls_priority=
1766
server_settings[u"priority"],
1767
use_dbus=use_dbus)
1768
if not debug:
1769
pidfilename = u"/var/run/mandos.pid"
1770
try:
1771
pidfile = open(pidfilename, u"w")
1772
except IOError:
1773
logger.error(u"Could not open file %r", pidfilename)
1774
1775
try:
1776
uid = pwd.getpwnam(u"_mandos").pw_uid
1777
gid = pwd.getpwnam(u"_mandos").pw_gid
1778
except KeyError:
1779
try:
1780
uid = pwd.getpwnam(u"mandos").pw_uid
1781
gid = pwd.getpwnam(u"mandos").pw_gid
1782
except KeyError:
1783
try:
1784
uid = pwd.getpwnam(u"nobody").pw_uid
1785
gid = pwd.getpwnam(u"nobody").pw_gid
1786
except KeyError:
1787
uid = 65534
1788
gid = 65534
1789
try:
1790
os.setgid(gid)
803
1791
os.setuid(uid)
804
os.setgid(gid)
805
1792
except OSError, error:
806
1793
if error[0] != errno.EPERM:
807
1794
raise error
808
1795
809
global service
810
service = AvahiService(name = server_settings["servicename"],
811
servicetype = "_mandos._tcp", )
812
if server_settings["interface"]:
813
service.interface = if_nametoindex\
814
(server_settings["interface"])
1796
if not debug and not debuglevel:
1797
syslogger.setLevel(logging.WARNING)
1798
console.setLevel(logging.WARNING)
1799
if debuglevel:
1800
level = getattr(logging, debuglevel.upper())
1801
syslogger.setLevel(level)
1802
console.setLevel(level)
1803
1804
if debug:
1805
# Enable all possible GnuTLS debugging
1806
1807
# "Use a log level over 10 to enable all debugging options."
1808
# - GnuTLS manual
1809
gnutls.library.functions.gnutls_global_set_log_level(11)
1810
1811
@gnutls.library.types.gnutls_log_func
1812
def debug_gnutls(level, string):
1813
logger.debug(u"GnuTLS: %s", string[:-1])
1814
1815
(gnutls.library.functions
1816
.gnutls_global_set_log_function(debug_gnutls))
1817
1818
# Redirect stdin so all checkers get /dev/null
1819
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1820
os.dup2(null, sys.stdin.fileno())
1821
if null > 2:
1822
os.close(null)
1823
else:
1824
# No console logging
1825
logger.removeHandler(console)
1826
815
1827
816
1828
global main_loop
817
global bus
818
global server
819
1829
# From the Avahi example code
820
1830
DBusGMainLoop(set_as_default=True )
821
1831
main_loop = gobject.MainLoop()
822
1832
bus = dbus.SystemBus()
823
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
824
avahi.DBUS_PATH_SERVER),
825
avahi.DBUS_INTERFACE_SERVER)
826
1833
# End of Avahi example code
827
828
def remove_from_clients(client):
829
clients.remove(client)
830
if not clients:
831
logger.critical(u"No clients left, exiting")
832
sys.exit()
833
834
clients.update(Set(Client(name = section,
835
stop_hook = remove_from_clients,
836
config
837
= dict(client_config.items(section)))
838
for section in client_config.sections()))
839
if not clients:
840
logger.critical(u"No clients defined")
841
sys.exit(1)
842
843
if debug:
844
# Redirect stdin so all checkers get /dev/null
845
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
846
os.dup2(null, sys.stdin.fileno())
847
if null > 2:
848
os.close(null)
849
else:
850
# No console logging
851
logger.removeHandler(console)
1834
if use_dbus:
1835
try:
1836
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1837
bus, do_not_queue=True)
1838
except dbus.exceptions.NameExistsException, e:
1839
logger.error(unicode(e) + u", disabling D-Bus")
1840
use_dbus = False
1841
server_settings[u"use_dbus"] = False
1842
tcp_server.use_dbus = False
1843
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1844
service = AvahiService(name = server_settings[u"servicename"],
1845
servicetype = u"_mandos._tcp",
1846
protocol = protocol, bus = bus)
1847
if server_settings["interface"]:
1848
service.interface = (if_nametoindex
1849
(str(server_settings[u"interface"])))
1850
1851
if not debug:
852
1852
# Close all input and output, do double fork, etc.
853
1853
daemon()
854
855
try:
856
pid = os.getpid()
857
pidfile.write(str(pid) + "\n")
858
pidfile.close()
859
del pidfile
860
except IOError:
861
logger.error(u"Could not write to file %r with PID %d",
862
pidfilename, pid)
863
except NameError:
864
# "pidfile" was never created
865
pass
866
del pidfilename
1854
1855
global multiprocessing_manager
1856
multiprocessing_manager = multiprocessing.Manager()
1857
1858
client_class = Client
1859
if use_dbus:
1860
client_class = functools.partial(ClientDBus, bus = bus)
1861
def client_config_items(config, section):
1862
special_settings = {
1863
"approved_by_default":
1864
lambda: config.getboolean(section,
1865
"approved_by_default"),
1866
}
1867
for name, value in config.items(section):
1868
try:
1869
yield (name, special_settings[name]())
1870
except KeyError:
1871
yield (name, value)
1872
1873
tcp_server.clients.update(set(
1874
client_class(name = section,
1875
config= dict(client_config_items(
1876
client_config, section)))
1877
for section in client_config.sections()))
1878
if not tcp_server.clients:
1879
logger.warning(u"No clients defined")
1880
1881
if not debug:
1882
try:
1883
with pidfile:
1884
pid = os.getpid()
1885
pidfile.write(str(pid) + "\n")
1886
del pidfile
1887
except IOError:
1888
logger.error(u"Could not write to file %r with PID %d",
1889
pidfilename, pid)
1890
except NameError:
1891
# "pidfile" was never created
1892
pass
1893
del pidfilename
1894
1895
signal.signal(signal.SIGINT, signal.SIG_IGN)
1896
1897
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1898
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1899
1900
if use_dbus:
1901
class MandosDBusService(dbus.service.Object):
1902
"""A D-Bus proxy object"""
1903
def __init__(self):
1904
dbus.service.Object.__init__(self, bus, u"/")
1905
_interface = u"se.bsnet.fukt.Mandos"
1906
1907
@dbus.service.signal(_interface, signature=u"o")
1908
def ClientAdded(self, objpath):
1909
"D-Bus signal"
1910
pass
1911
1912
@dbus.service.signal(_interface, signature=u"ss")
1913
def ClientNotFound(self, fingerprint, address):
1914
"D-Bus signal"
1915
pass
1916
1917
@dbus.service.signal(_interface, signature=u"os")
1918
def ClientRemoved(self, objpath, name):
1919
"D-Bus signal"
1920
pass
1921
1922
@dbus.service.method(_interface, out_signature=u"ao")
1923
def GetAllClients(self):
1924
"D-Bus method"
1925
return dbus.Array(c.dbus_object_path
1926
for c in tcp_server.clients)
1927
1928
@dbus.service.method(_interface,
1929
out_signature=u"a{oa{sv}}")
1930
def GetAllClientsWithProperties(self):
1931
"D-Bus method"
1932
return dbus.Dictionary(
1933
((c.dbus_object_path, c.GetAll(u""))
1934
for c in tcp_server.clients),
1935
signature=u"oa{sv}")
1936
1937
@dbus.service.method(_interface, in_signature=u"o")
1938
def RemoveClient(self, object_path):
1939
"D-Bus method"
1940
for c in tcp_server.clients:
1941
if c.dbus_object_path == object_path:
1942
tcp_server.clients.remove(c)
1943
c.remove_from_connection()
1944
# Don't signal anything except ClientRemoved
1945
c.disable(quiet=True)
1946
# Emit D-Bus signal
1947
self.ClientRemoved(object_path, c.name)
1948
return
1949
raise KeyError(object_path)
1950
1951
del _interface
1952
1953
mandos_dbus_service = MandosDBusService()
867
1954
868
1955
def cleanup():
869
1956
"Cleanup function; run on exit"
870
global group
871
# From the Avahi example code
872
if not group is None:
873
group.Free()
874
group = None
875
# End of Avahi example code
1957
service.cleanup()
876
1958
877
while clients:
878
client = clients.pop()
879
client.stop_hook = None
880
client.stop()
1959
while tcp_server.clients:
1960
client = tcp_server.clients.pop()
1961
if use_dbus:
1962
client.remove_from_connection()
1963
client.disable_hook = None
1964
# Don't signal anything except ClientRemoved
1965
client.disable(quiet=True)
1966
if use_dbus:
1967
# Emit D-Bus signal
1968
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1969
client.name)
881
1970
882
1971
atexit.register(cleanup)
883
1972
884
if not debug:
885
signal.signal(signal.SIGINT, signal.SIG_IGN)
886
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
887
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
888
889
for client in clients:
890
client.start()
1973
for client in tcp_server.clients:
1974
if use_dbus:
1975
# Emit D-Bus signal
1976
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1977
client.enable()
891
1978
892
1979
tcp_server.enable()
893
1980
tcp_server.server_activate()
894
1981
895
1982
# Find out what port we got
896
1983
service.port = tcp_server.socket.getsockname()[1]
897
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
898
u" scope_id %d" % tcp_server.socket.getsockname())
1984
if use_ipv6:
1985
logger.info(u"Now listening on address %r, port %d,"
1986
" flowinfo %d, scope_id %d"
1987
% tcp_server.socket.getsockname())
1988
else: # IPv4
1989
logger.info(u"Now listening on address %r, port %d"
1990
% tcp_server.socket.getsockname())
899
1991
900
1992
#service.interface = tcp_server.socket.getsockname()[3]
901
1993
902
1994
try:
903
1995
# From the Avahi example code
904
server.connect_to_signal("StateChanged", server_state_changed)
905
1996
try:
906
server_state_changed(server.GetState())
1997
service.activate()
907
1998
except dbus.exceptions.DBusException, error:
908
1999
logger.critical(u"DBusException: %s", error)
2000
cleanup()
909
2001
sys.exit(1)
910
2002
# End of Avahi example code
911
2003
912
2004
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
913
2005
lambda *args, **kwargs:
914
tcp_server.handle_request\
915
(*args[2:], **kwargs) or True)
2006
(tcp_server.handle_request
2007
(*args[2:], **kwargs) or True))
916
2008
917
2009
logger.debug(u"Starting main loop")
918
2010
main_loop.run()
919
2011
except AvahiError, error:
920
logger.critical(u"AvahiError: %s" + unicode(error))
2012
logger.critical(u"AvahiError: %s", error)
2013
cleanup()
921
2014
sys.exit(1)
922
2015
except KeyboardInterrupt:
923
2016
if debug:
924
print
2017
print >> sys.stderr
2018
logger.debug(u"Server received KeyboardInterrupt")
2019
logger.debug(u"Server exiting")
2020
# Must run before the D-Bus bus name gets deregistered
2021
cleanup()
925
2022
926
2023
if __name__ == '__main__':
927
2024
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0