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- Committer: Teddy Hogeborn
- Date: 2009-12-27 03:35:58 UTC
- Revision ID: teddy@fukt.bsnet.se-20091227033558-y57wv1u4cls3i8kq
TODO file changes.
- files added:
- dbus-mandos.conf
- 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".
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12
#
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13
# Everything else is
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# Copyright © 2008 Teddy Hogeborn
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# Copyright © 2008 Björn Påhlsson
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# Copyright © 2008,2009 Teddy Hogeborn
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# Copyright © 2008,2009 Björn Påhlsson
16
16
#
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# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
33
33
34
34
from __future__ import division, with_statement, absolute_import
35
35
36
import SocketServer
36
import SocketServer as socketserver
37
37
import socket
38
from optparse import OptionParser
38
import optparse
39
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import datetime
40
40
import errno
41
41
import gnutls.crypto
44
44
import gnutls.library.functions
45
45
import gnutls.library.constants
46
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import gnutls.library.types
47
import ConfigParser
47
import ConfigParser as configparser
48
48
import sys
49
49
import re
50
50
import os
51
51
import signal
52
from sets import Set
53
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import subprocess
54
53
import atexit
55
54
import stat
56
55
import logging
57
56
import logging.handlers
58
57
import pwd
59
from contextlib import closing
58
import contextlib
59
import struct
60
import fcntl
61
import functools
62
import cPickle as pickle
60
63
61
64
import dbus
62
65
import dbus.service
65
68
from dbus.mainloop.glib import DBusGMainLoop
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import ctypes
67
70
import ctypes.util
68
69
version = "1.0.2"
70
71
logger = logging.Logger('mandos')
71
import xml.dom.minidom
72
import inspect
73
74
try:
75
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
76
except AttributeError:
77
try:
78
from IN import SO_BINDTODEVICE
79
except ImportError:
80
SO_BINDTODEVICE = None
81
82
83
version = "1.0.14"
84
85
logger = logging.Logger(u'mandos')
72
86
syslogger = (logging.handlers.SysLogHandler
73
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
88
address = "/dev/log"))
75
89
syslogger.setFormatter(logging.Formatter
76
('Mandos: %(levelname)s: %(message)s'))
90
(u'Mandos [%(process)d]: %(levelname)s:'
91
u' %(message)s'))
77
92
logger.addHandler(syslogger)
78
93
79
94
console = logging.StreamHandler()
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
81
' %(message)s'))
95
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
96
u' %(levelname)s:'
97
u' %(message)s'))
82
98
logger.addHandler(console)
83
99
84
100
class AvahiError(Exception):
85
def __init__(self, value):
101
def __init__(self, value, *args, **kwargs):
86
102
self.value = value
87
super(AvahiError, self).__init__()
88
def __str__(self):
89
return repr(self.value)
103
super(AvahiError, self).__init__(value, *args, **kwargs)
104
def __unicode__(self):
105
return unicode(repr(self.value))
90
106
91
107
class AvahiServiceError(AvahiError):
92
108
pass
97
113
98
114
class AvahiService(object):
99
115
"""An Avahi (Zeroconf) service.
116
100
117
Attributes:
101
118
interface: integer; avahi.IF_UNSPEC or an interface index.
102
119
Used to optionally bind to the specified interface.
103
name: string; Example: 'Mandos'
104
type: string; Example: '_mandos._tcp'.
120
name: string; Example: u'Mandos'
121
type: string; Example: u'_mandos._tcp'.
105
122
See <http://www.dns-sd.org/ServiceTypes.html>
106
123
port: integer; what port to announce
107
124
TXT: list of strings; TXT record for the service
110
127
max_renames: integer; maximum number of renames
111
128
rename_count: integer; counter so we only rename after collisions
112
129
a sensible number of times
130
group: D-Bus Entry Group
131
server: D-Bus Server
132
bus: dbus.SystemBus()
113
133
"""
114
134
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
135
servicetype = None, port = None, TXT = None,
116
domain = "", host = "", max_renames = 32768):
136
domain = u"", host = u"", max_renames = 32768,
137
protocol = avahi.PROTO_UNSPEC, bus = None):
117
138
self.interface = interface
118
139
self.name = name
119
140
self.type = servicetype
123
144
self.host = host
124
145
self.rename_count = 0
125
146
self.max_renames = max_renames
147
self.protocol = protocol
148
self.group = None # our entry group
149
self.server = None
150
self.bus = bus
126
151
def rename(self):
127
152
"""Derived from the Avahi example code"""
128
153
if self.rename_count >= self.max_renames:
129
154
logger.critical(u"No suitable Zeroconf service name found"
130
155
u" after %i retries, exiting.",
131
156
self.rename_count)
132
raise AvahiServiceError("Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
157
raise AvahiServiceError(u"Too many renames")
158
self.name = self.server.GetAlternativeServiceName(self.name)
134
159
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
160
unicode(self.name))
136
161
syslogger.setFormatter(logging.Formatter
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
162
(u'Mandos (%s) [%%(process)d]:'
163
u' %%(levelname)s: %%(message)s'
164
% self.name))
139
165
self.remove()
140
166
self.add()
141
167
self.rename_count += 1
142
168
def remove(self):
143
169
"""Derived from the Avahi example code"""
144
if group is not None:
145
group.Reset()
170
if self.group is not None:
171
self.group.Reset()
146
172
def add(self):
147
173
"""Derived from the Avahi example code"""
148
global group
149
if group is None:
150
group = dbus.Interface(bus.get_object
151
(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
174
if self.group is None:
175
self.group = dbus.Interface(
176
self.bus.get_object(avahi.DBUS_NAME,
177
self.server.EntryGroupNew()),
178
avahi.DBUS_INTERFACE_ENTRY_GROUP)
179
self.group.connect_to_signal('StateChanged',
180
self
181
.entry_group_state_changed)
156
182
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
171
172
173
def _datetime_to_dbus_struct(dt, variant_level=0):
174
"""Convert a UTC datetime.datetime() to a D-Bus struct.
175
The format is special to this application, since we could not find
176
any other standard way."""
177
return dbus.Struct((dbus.Int16(dt.year),
178
dbus.Byte(dt.month),
179
dbus.Byte(dt.day),
180
dbus.Byte(dt.hour),
181
dbus.Byte(dt.minute),
182
dbus.Byte(dt.second),
183
dbus.UInt32(dt.microsecond)),
184
signature="nyyyyyu",
185
variant_level=variant_level)
186
187
188
class Client(dbus.service.Object):
183
self.name, self.type)
184
self.group.AddService(
185
self.interface,
186
self.protocol,
187
dbus.UInt32(0), # flags
188
self.name, self.type,
189
self.domain, self.host,
190
dbus.UInt16(self.port),
191
avahi.string_array_to_txt_array(self.TXT))
192
self.group.Commit()
193
def entry_group_state_changed(self, state, error):
194
"""Derived from the Avahi example code"""
195
logger.debug(u"Avahi state change: %i", state)
196
197
if state == avahi.ENTRY_GROUP_ESTABLISHED:
198
logger.debug(u"Zeroconf service established.")
199
elif state == avahi.ENTRY_GROUP_COLLISION:
200
logger.warning(u"Zeroconf service name collision.")
201
self.rename()
202
elif state == avahi.ENTRY_GROUP_FAILURE:
203
logger.critical(u"Avahi: Error in group state changed %s",
204
unicode(error))
205
raise AvahiGroupError(u"State changed: %s"
206
% unicode(error))
207
def cleanup(self):
208
"""Derived from the Avahi example code"""
209
if self.group is not None:
210
self.group.Free()
211
self.group = None
212
def server_state_changed(self, state):
213
"""Derived from the Avahi example code"""
214
if state == avahi.SERVER_COLLISION:
215
logger.error(u"Zeroconf server name collision")
216
self.remove()
217
elif state == avahi.SERVER_RUNNING:
218
self.add()
219
def activate(self):
220
"""Derived from the Avahi example code"""
221
if self.server is None:
222
self.server = dbus.Interface(
223
self.bus.get_object(avahi.DBUS_NAME,
224
avahi.DBUS_PATH_SERVER),
225
avahi.DBUS_INTERFACE_SERVER)
226
self.server.connect_to_signal(u"StateChanged",
227
self.server_state_changed)
228
self.server_state_changed(self.server.GetState())
229
230
231
class Client(object):
189
232
"""A representation of a client host served by this server.
233
190
234
Attributes:
191
name: string; from the config file, used in log messages
235
name: string; from the config file, used in log messages and
236
D-Bus identifiers
192
237
fingerprint: string (40 or 32 hexadecimal digits); used to
193
238
uniquely identify the client
194
239
secret: bytestring; sent verbatim (over TLS) to client
195
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host: string; available for use by the checker command
196
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created: datetime.datetime(); (UTC) object creation
197
last_started: datetime.datetime(); (UTC)
198
started: bool()
242
last_enabled: datetime.datetime(); (UTC)
243
enabled: bool()
199
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last_checked_ok: datetime.datetime(); (UTC) or None
200
245
timeout: datetime.timedelta(); How long from last_checked_ok
201
until this client is invalid
246
until this client is disabled
202
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interval: datetime.timedelta(); How often to start a new checker
203
stop_hook: If set, called by stop() as stop_hook(self)
248
disable_hook: If set, called by disable() as disable_hook(self)
204
249
checker: subprocess.Popen(); a running checker process used
205
250
to see if the client lives.
206
251
'None' if no process is running.
207
252
checker_initiator_tag: a gobject event source tag, or None
208
stop_initiator_tag: - '' -
253
disable_initiator_tag: - '' -
209
254
checker_callback_tag: - '' -
210
255
checker_command: string; External command which is run to check if
211
256
client lives. %() expansions are done at
212
257
runtime with vars(self) as dict, so that for
213
258
instance %(name)s can be used in the command.
214
dbus_object_path: dbus.ObjectPath
215
Private attibutes:
216
_timeout: Real variable for 'timeout'
217
_interval: Real variable for 'interval'
218
_timeout_milliseconds: Used when calling gobject.timeout_add()
219
_interval_milliseconds: - '' -
259
current_checker_command: string; current running checker_command
220
260
"""
221
def _set_timeout(self, timeout):
222
"Setter function for the 'timeout' attribute"
223
self._timeout = timeout
224
self._timeout_milliseconds = ((self.timeout.days
225
* 24 * 60 * 60 * 1000)
226
+ (self.timeout.seconds * 1000)
227
+ (self.timeout.microseconds
228
// 1000))
229
# Emit D-Bus signal
230
self.PropertyChanged(dbus.String(u"timeout"),
231
(dbus.UInt64(self._timeout_milliseconds,
232
variant_level=1)))
233
timeout = property(lambda self: self._timeout, _set_timeout)
234
del _set_timeout
235
236
def _set_interval(self, interval):
237
"Setter function for the 'interval' attribute"
238
self._interval = interval
239
self._interval_milliseconds = ((self.interval.days
240
* 24 * 60 * 60 * 1000)
241
+ (self.interval.seconds
242
* 1000)
243
+ (self.interval.microseconds
244
// 1000))
245
# Emit D-Bus signal
246
self.PropertyChanged(dbus.String(u"interval"),
247
(dbus.UInt64(self._interval_milliseconds,
248
variant_level=1)))
249
interval = property(lambda self: self._interval, _set_interval)
250
del _set_interval
251
252
def __init__(self, name = None, stop_hook=None, config=None):
261
262
@staticmethod
263
def _timedelta_to_milliseconds(td):
264
"Convert a datetime.timedelta() to milliseconds"
265
return ((td.days * 24 * 60 * 60 * 1000)
266
+ (td.seconds * 1000)
267
+ (td.microseconds // 1000))
268
269
def timeout_milliseconds(self):
270
"Return the 'timeout' attribute in milliseconds"
271
return self._timedelta_to_milliseconds(self.timeout)
272
273
def interval_milliseconds(self):
274
"Return the 'interval' attribute in milliseconds"
275
return self._timedelta_to_milliseconds(self.interval)
276
277
def __init__(self, name = None, disable_hook=None, config=None):
253
278
"""Note: the 'checker' key in 'config' sets the
254
279
'checker_command' attribute and *not* the 'checker'
255
280
attribute."""
256
self.dbus_object_path = (dbus.ObjectPath
257
("/Mandos/clients/"
258
+ name.replace(".", "_")))
259
dbus.service.Object.__init__(self, bus,
260
self.dbus_object_path)
281
self.name = name
261
282
if config is None:
262
283
config = {}
263
self.name = name
264
284
logger.debug(u"Creating client %r", self.name)
265
285
# Uppercase and remove spaces from fingerprint for later
266
286
# comparison purposes with return value from the fingerprint()
267
287
# function
268
self.fingerprint = (config["fingerprint"].upper()
288
self.fingerprint = (config[u"fingerprint"].upper()
269
289
.replace(u" ", u""))
270
290
logger.debug(u" Fingerprint: %s", self.fingerprint)
271
if "secret" in config:
272
self.secret = config["secret"].decode(u"base64")
273
elif "secfile" in config:
274
with closing(open(os.path.expanduser
275
(os.path.expandvars
276
(config["secfile"])))) as secfile:
291
if u"secret" in config:
292
self.secret = config[u"secret"].decode(u"base64")
293
elif u"secfile" in config:
294
with open(os.path.expanduser(os.path.expandvars
295
(config[u"secfile"])),
296
"rb") as secfile:
277
297
self.secret = secfile.read()
278
298
else:
279
299
raise TypeError(u"No secret or secfile for client %s"
280
300
% self.name)
281
self.host = config.get("host", "")
301
self.host = config.get(u"host", u"")
282
302
self.created = datetime.datetime.utcnow()
283
self.started = False
284
self.last_started = None
303
self.enabled = False
304
self.last_enabled = None
285
305
self.last_checked_ok = None
286
self.timeout = string_to_delta(config["timeout"])
287
self.interval = string_to_delta(config["interval"])
288
self.stop_hook = stop_hook
306
self.timeout = string_to_delta(config[u"timeout"])
307
self.interval = string_to_delta(config[u"interval"])
308
self.disable_hook = disable_hook
289
309
self.checker = None
290
310
self.checker_initiator_tag = None
291
self.stop_initiator_tag = None
311
self.disable_initiator_tag = None
292
312
self.checker_callback_tag = None
293
self.checker_command = config["checker"]
313
self.checker_command = config[u"checker"]
314
self.current_checker_command = None
315
self.last_connect = None
294
316
295
def start(self):
317
def enable(self):
296
318
"""Start this client's checker and timeout hooks"""
297
self.last_started = datetime.datetime.utcnow()
319
if getattr(self, u"enabled", False):
320
# Already enabled
321
return
322
self.last_enabled = datetime.datetime.utcnow()
298
323
# Schedule a new checker to be started an 'interval' from now,
299
324
# and every interval from then on.
300
325
self.checker_initiator_tag = (gobject.timeout_add
301
(self._interval_milliseconds,
326
(self.interval_milliseconds(),
302
327
self.start_checker))
328
# Schedule a disable() when 'timeout' has passed
329
self.disable_initiator_tag = (gobject.timeout_add
330
(self.timeout_milliseconds(),
331
self.disable))
332
self.enabled = True
303
333
# Also start a new checker *right now*.
304
334
self.start_checker()
305
# Schedule a stop() when 'timeout' has passed
306
self.stop_initiator_tag = (gobject.timeout_add
307
(self._timeout_milliseconds,
308
self.stop))
309
self.started = True
310
# Emit D-Bus signal
311
self.PropertyChanged(dbus.String(u"started"),
312
dbus.Boolean(True, variant_level=1))
313
self.PropertyChanged(dbus.String(u"last_started"),
314
(_datetime_to_dbus_struct
315
(self.last_started, variant_level=1)))
316
335
317
def stop(self):
318
"""Stop this client."""
319
if not getattr(self, "started", False):
336
def disable(self, quiet=True):
337
"""Disable this client."""
338
if not getattr(self, "enabled", False):
320
339
return False
321
logger.info(u"Stopping client %s", self.name)
322
if getattr(self, "stop_initiator_tag", False):
323
gobject.source_remove(self.stop_initiator_tag)
324
self.stop_initiator_tag = None
325
if getattr(self, "checker_initiator_tag", False):
340
if not quiet:
341
logger.info(u"Disabling client %s", self.name)
342
if getattr(self, u"disable_initiator_tag", False):
343
gobject.source_remove(self.disable_initiator_tag)
344
self.disable_initiator_tag = None
345
if getattr(self, u"checker_initiator_tag", False):
326
346
gobject.source_remove(self.checker_initiator_tag)
327
347
self.checker_initiator_tag = None
328
348
self.stop_checker()
329
if self.stop_hook:
330
self.stop_hook(self)
331
self.started = False
332
# Emit D-Bus signal
333
self.PropertyChanged(dbus.String(u"started"),
334
dbus.Boolean(False, variant_level=1))
349
if self.disable_hook:
350
self.disable_hook(self)
351
self.enabled = False
335
352
# Do not run this again if called by a gobject.timeout_add
336
353
return False
337
354
338
355
def __del__(self):
339
self.stop_hook = None
340
self.stop()
356
self.disable_hook = None
357
self.disable()
341
358
342
359
def checker_callback(self, pid, condition, command):
343
360
"""The checker has completed, so take appropriate actions."""
344
361
self.checker_callback_tag = None
345
362
self.checker = None
346
# Emit D-Bus signal
347
self.PropertyChanged(dbus.String(u"checker_running"),
348
dbus.Boolean(False, variant_level=1))
349
if (os.WIFEXITED(condition)
350
and (os.WEXITSTATUS(condition) == 0)):
351
logger.info(u"Checker for %(name)s succeeded",
352
vars(self))
353
# Emit D-Bus signal
354
self.CheckerCompleted(dbus.Boolean(True),
355
dbus.UInt16(condition),
356
dbus.String(command))
357
self.bump_timeout()
358
elif not os.WIFEXITED(condition):
363
if os.WIFEXITED(condition):
364
exitstatus = os.WEXITSTATUS(condition)
365
if exitstatus == 0:
366
logger.info(u"Checker for %(name)s succeeded",
367
vars(self))
368
self.checked_ok()
369
else:
370
logger.info(u"Checker for %(name)s failed",
371
vars(self))
372
else:
359
373
logger.warning(u"Checker for %(name)s crashed?",
360
374
vars(self))
361
# Emit D-Bus signal
362
self.CheckerCompleted(dbus.Boolean(False),
363
dbus.UInt16(condition),
364
dbus.String(command))
365
else:
366
logger.info(u"Checker for %(name)s failed",
367
vars(self))
368
# Emit D-Bus signal
369
self.CheckerCompleted(dbus.Boolean(False),
370
dbus.UInt16(condition),
371
dbus.String(command))
372
375
373
def bump_timeout(self):
376
def checked_ok(self):
374
377
"""Bump up the timeout for this client.
378
375
379
This should only be called when the client has been seen,
376
380
alive and well.
377
381
"""
378
382
self.last_checked_ok = datetime.datetime.utcnow()
379
gobject.source_remove(self.stop_initiator_tag)
380
self.stop_initiator_tag = (gobject.timeout_add
381
(self._timeout_milliseconds,
382
self.stop))
383
self.PropertyChanged(dbus.String(u"last_checked_ok"),
384
(_datetime_to_dbus_struct
385
(self.last_checked_ok,
386
variant_level=1)))
383
gobject.source_remove(self.disable_initiator_tag)
384
self.disable_initiator_tag = (gobject.timeout_add
385
(self.timeout_milliseconds(),
386
self.disable))
387
387
388
388
def start_checker(self):
389
389
"""Start a new checker subprocess if one is not running.
390
390
391
If a checker already exists, leave it running and do
391
392
nothing."""
392
393
# The reason for not killing a running checker is that if we
395
396
# client would inevitably timeout, since no checker would get
396
397
# a chance to run to completion. If we instead leave running
397
398
# checkers alone, the checker would have to take more time
398
# than 'timeout' for the client to be declared invalid, which
399
# is as it should be.
399
# than 'timeout' for the client to be disabled, which is as it
400
# should be.
401
402
# If a checker exists, make sure it is not a zombie
403
try:
404
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
405
except (AttributeError, OSError), error:
406
if (isinstance(error, OSError)
407
and error.errno != errno.ECHILD):
408
raise error
409
else:
410
if pid:
411
logger.warning(u"Checker was a zombie")
412
gobject.source_remove(self.checker_callback_tag)
413
self.checker_callback(pid, status,
414
self.current_checker_command)
415
# Start a new checker if needed
400
416
if self.checker is None:
401
417
try:
402
418
# In case checker_command has exactly one % operator
403
419
command = self.checker_command % self.host
404
420
except TypeError:
405
421
# Escape attributes for the shell
406
escaped_attrs = dict((key, re.escape(str(val)))
422
escaped_attrs = dict((key,
423
re.escape(unicode(str(val),
424
errors=
425
u'replace')))
407
426
for key, val in
408
427
vars(self).iteritems())
409
428
try:
412
431
logger.error(u'Could not format string "%s":'
413
432
u' %s', self.checker_command, error)
414
433
return True # Try again later
434
self.current_checker_command = command
415
435
try:
416
436
logger.info(u"Starting checker %r for %s",
417
437
command, self.name)
421
441
# always replaced by /dev/null.)
422
442
self.checker = subprocess.Popen(command,
423
443
close_fds=True,
424
shell=True, cwd="/")
425
# Emit D-Bus signal
426
self.CheckerStarted(command)
427
self.PropertyChanged(dbus.String("checker_running"),
428
dbus.Boolean(True, variant_level=1))
444
shell=True, cwd=u"/")
429
445
self.checker_callback_tag = (gobject.child_watch_add
430
446
(self.checker.pid,
431
447
self.checker_callback,
432
448
data=command))
449
# The checker may have completed before the gobject
450
# watch was added. Check for this.
451
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
452
if pid:
453
gobject.source_remove(self.checker_callback_tag)
454
self.checker_callback(pid, status, command)
433
455
except OSError, error:
434
456
logger.error(u"Failed to start subprocess: %s",
435
457
error)
441
463
if self.checker_callback_tag:
442
464
gobject.source_remove(self.checker_callback_tag)
443
465
self.checker_callback_tag = None
444
if getattr(self, "checker", None) is None:
466
if getattr(self, u"checker", None) is None:
445
467
return
446
468
logger.debug(u"Stopping checker for %(name)s", vars(self))
447
469
try:
448
470
os.kill(self.checker.pid, signal.SIGTERM)
449
#os.sleep(0.5)
471
#time.sleep(0.5)
450
472
#if self.checker.poll() is None:
451
473
# os.kill(self.checker.pid, signal.SIGKILL)
452
474
except OSError, error:
453
475
if error.errno != errno.ESRCH: # No such process
454
476
raise
455
477
self.checker = None
478
479
480
def dbus_service_property(dbus_interface, signature=u"v",
481
access=u"readwrite", byte_arrays=False):
482
"""Decorators for marking methods of a DBusObjectWithProperties to
483
become properties on the D-Bus.
484
485
The decorated method will be called with no arguments by "Get"
486
and with one argument by "Set".
487
488
The parameters, where they are supported, are the same as
489
dbus.service.method, except there is only "signature", since the
490
type from Get() and the type sent to Set() is the same.
491
"""
492
# Encoding deeply encoded byte arrays is not supported yet by the
493
# "Set" method, so we fail early here:
494
if byte_arrays and signature != u"ay":
495
raise ValueError(u"Byte arrays not supported for non-'ay'"
496
u" signature %r" % signature)
497
def decorator(func):
498
func._dbus_is_property = True
499
func._dbus_interface = dbus_interface
500
func._dbus_signature = signature
501
func._dbus_access = access
502
func._dbus_name = func.__name__
503
if func._dbus_name.endswith(u"_dbus_property"):
504
func._dbus_name = func._dbus_name[:-14]
505
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
506
return func
507
return decorator
508
509
510
class DBusPropertyException(dbus.exceptions.DBusException):
511
"""A base class for D-Bus property-related exceptions
512
"""
513
def __unicode__(self):
514
return unicode(str(self))
515
516
517
class DBusPropertyAccessException(DBusPropertyException):
518
"""A property's access permissions disallows an operation.
519
"""
520
pass
521
522
523
class DBusPropertyNotFound(DBusPropertyException):
524
"""An attempt was made to access a non-existing property.
525
"""
526
pass
527
528
529
class DBusObjectWithProperties(dbus.service.Object):
530
"""A D-Bus object with properties.
531
532
Classes inheriting from this can use the dbus_service_property
533
decorator to expose methods as D-Bus properties. It exposes the
534
standard Get(), Set(), and GetAll() methods on the D-Bus.
535
"""
536
537
@staticmethod
538
def _is_dbus_property(obj):
539
return getattr(obj, u"_dbus_is_property", False)
540
541
def _get_all_dbus_properties(self):
542
"""Returns a generator of (name, attribute) pairs
543
"""
544
return ((prop._dbus_name, prop)
545
for name, prop in
546
inspect.getmembers(self, self._is_dbus_property))
547
548
def _get_dbus_property(self, interface_name, property_name):
549
"""Returns a bound method if one exists which is a D-Bus
550
property with the specified name and interface.
551
"""
552
for name in (property_name,
553
property_name + u"_dbus_property"):
554
prop = getattr(self, name, None)
555
if (prop is None
556
or not self._is_dbus_property(prop)
557
or prop._dbus_name != property_name
558
or (interface_name and prop._dbus_interface
559
and interface_name != prop._dbus_interface)):
560
continue
561
return prop
562
# No such property
563
raise DBusPropertyNotFound(self.dbus_object_path + u":"
564
+ interface_name + u"."
565
+ property_name)
566
567
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
568
out_signature=u"v")
569
def Get(self, interface_name, property_name):
570
"""Standard D-Bus property Get() method, see D-Bus standard.
571
"""
572
prop = self._get_dbus_property(interface_name, property_name)
573
if prop._dbus_access == u"write":
574
raise DBusPropertyAccessException(property_name)
575
value = prop()
576
if not hasattr(value, u"variant_level"):
577
return value
578
return type(value)(value, variant_level=value.variant_level+1)
579
580
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
581
def Set(self, interface_name, property_name, value):
582
"""Standard D-Bus property Set() method, see D-Bus standard.
583
"""
584
prop = self._get_dbus_property(interface_name, property_name)
585
if prop._dbus_access == u"read":
586
raise DBusPropertyAccessException(property_name)
587
if prop._dbus_get_args_options[u"byte_arrays"]:
588
# The byte_arrays option is not supported yet on
589
# signatures other than "ay".
590
if prop._dbus_signature != u"ay":
591
raise ValueError
592
value = dbus.ByteArray(''.join(unichr(byte)
593
for byte in value))
594
prop(value)
595
596
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
597
out_signature=u"a{sv}")
598
def GetAll(self, interface_name):
599
"""Standard D-Bus property GetAll() method, see D-Bus
600
standard.
601
602
Note: Will not include properties with access="write".
603
"""
604
all = {}
605
for name, prop in self._get_all_dbus_properties():
606
if (interface_name
607
and interface_name != prop._dbus_interface):
608
# Interface non-empty but did not match
609
continue
610
# Ignore write-only properties
611
if prop._dbus_access == u"write":
612
continue
613
value = prop()
614
if not hasattr(value, u"variant_level"):
615
all[name] = value
616
continue
617
all[name] = type(value)(value, variant_level=
618
value.variant_level+1)
619
return dbus.Dictionary(all, signature=u"sv")
620
621
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
622
out_signature=u"s",
623
path_keyword='object_path',
624
connection_keyword='connection')
625
def Introspect(self, object_path, connection):
626
"""Standard D-Bus method, overloaded to insert property tags.
627
"""
628
xmlstring = dbus.service.Object.Introspect(self, object_path,
629
connection)
630
try:
631
document = xml.dom.minidom.parseString(xmlstring)
632
def make_tag(document, name, prop):
633
e = document.createElement(u"property")
634
e.setAttribute(u"name", name)
635
e.setAttribute(u"type", prop._dbus_signature)
636
e.setAttribute(u"access", prop._dbus_access)
637
return e
638
for if_tag in document.getElementsByTagName(u"interface"):
639
for tag in (make_tag(document, name, prop)
640
for name, prop
641
in self._get_all_dbus_properties()
642
if prop._dbus_interface
643
== if_tag.getAttribute(u"name")):
644
if_tag.appendChild(tag)
645
# Add the names to the return values for the
646
# "org.freedesktop.DBus.Properties" methods
647
if (if_tag.getAttribute(u"name")
648
== u"org.freedesktop.DBus.Properties"):
649
for cn in if_tag.getElementsByTagName(u"method"):
650
if cn.getAttribute(u"name") == u"Get":
651
for arg in cn.getElementsByTagName(u"arg"):
652
if (arg.getAttribute(u"direction")
653
== u"out"):
654
arg.setAttribute(u"name", u"value")
655
elif cn.getAttribute(u"name") == u"GetAll":
656
for arg in cn.getElementsByTagName(u"arg"):
657
if (arg.getAttribute(u"direction")
658
== u"out"):
659
arg.setAttribute(u"name", u"props")
660
xmlstring = document.toxml(u"utf-8")
661
document.unlink()
662
except (AttributeError, xml.dom.DOMException,
663
xml.parsers.expat.ExpatError), error:
664
logger.error(u"Failed to override Introspection method",
665
error)
666
return xmlstring
667
668
669
class ClientDBus(Client, DBusObjectWithProperties):
670
"""A Client class using D-Bus
671
672
Attributes:
673
dbus_object_path: dbus.ObjectPath
674
bus: dbus.SystemBus()
675
"""
676
# dbus.service.Object doesn't use super(), so we can't either.
677
678
def __init__(self, bus = None, *args, **kwargs):
679
self.bus = bus
680
Client.__init__(self, *args, **kwargs)
681
# Only now, when this client is initialized, can it show up on
682
# the D-Bus
683
self.dbus_object_path = (dbus.ObjectPath
684
(u"/clients/"
685
+ self.name.replace(u".", u"_")))
686
DBusObjectWithProperties.__init__(self, self.bus,
687
self.dbus_object_path)
688
689
@staticmethod
690
def _datetime_to_dbus(dt, variant_level=0):
691
"""Convert a UTC datetime.datetime() to a D-Bus type."""
692
return dbus.String(dt.isoformat(),
693
variant_level=variant_level)
694
695
def enable(self):
696
oldstate = getattr(self, u"enabled", False)
697
r = Client.enable(self)
698
if oldstate != self.enabled:
699
# Emit D-Bus signals
700
self.PropertyChanged(dbus.String(u"enabled"),
701
dbus.Boolean(True, variant_level=1))
702
self.PropertyChanged(
703
dbus.String(u"last_enabled"),
704
self._datetime_to_dbus(self.last_enabled,
705
variant_level=1))
706
return r
707
708
def disable(self, quiet = False):
709
oldstate = getattr(self, u"enabled", False)
710
r = Client.disable(self, quiet=quiet)
711
if not quiet and oldstate != self.enabled:
712
# Emit D-Bus signal
713
self.PropertyChanged(dbus.String(u"enabled"),
714
dbus.Boolean(False, variant_level=1))
715
return r
716
717
def __del__(self, *args, **kwargs):
718
try:
719
self.remove_from_connection()
720
except LookupError:
721
pass
722
if hasattr(DBusObjectWithProperties, u"__del__"):
723
DBusObjectWithProperties.__del__(self, *args, **kwargs)
724
Client.__del__(self, *args, **kwargs)
725
726
def checker_callback(self, pid, condition, command,
727
*args, **kwargs):
728
self.checker_callback_tag = None
729
self.checker = None
730
# Emit D-Bus signal
456
731
self.PropertyChanged(dbus.String(u"checker_running"),
457
732
dbus.Boolean(False, variant_level=1))
458
459
def still_valid(self):
460
"""Has the timeout not yet passed for this client?"""
461
if not getattr(self, "started", False):
462
return False
463
now = datetime.datetime.utcnow()
464
if self.last_checked_ok is None:
465
return now < (self.created + self.timeout)
466
else:
467
return now < (self.last_checked_ok + self.timeout)
733
if os.WIFEXITED(condition):
734
exitstatus = os.WEXITSTATUS(condition)
735
# Emit D-Bus signal
736
self.CheckerCompleted(dbus.Int16(exitstatus),
737
dbus.Int64(condition),
738
dbus.String(command))
739
else:
740
# Emit D-Bus signal
741
self.CheckerCompleted(dbus.Int16(-1),
742
dbus.Int64(condition),
743
dbus.String(command))
744
745
return Client.checker_callback(self, pid, condition, command,
746
*args, **kwargs)
747
748
def checked_ok(self, *args, **kwargs):
749
r = Client.checked_ok(self, *args, **kwargs)
750
# Emit D-Bus signal
751
self.PropertyChanged(
752
dbus.String(u"last_checked_ok"),
753
(self._datetime_to_dbus(self.last_checked_ok,
754
variant_level=1)))
755
return r
756
757
def start_checker(self, *args, **kwargs):
758
old_checker = self.checker
759
if self.checker is not None:
760
old_checker_pid = self.checker.pid
761
else:
762
old_checker_pid = None
763
r = Client.start_checker(self, *args, **kwargs)
764
# Only if new checker process was started
765
if (self.checker is not None
766
and old_checker_pid != self.checker.pid):
767
# Emit D-Bus signal
768
self.CheckerStarted(self.current_checker_command)
769
self.PropertyChanged(
770
dbus.String(u"checker_running"),
771
dbus.Boolean(True, variant_level=1))
772
return r
773
774
def stop_checker(self, *args, **kwargs):
775
old_checker = getattr(self, u"checker", None)
776
r = Client.stop_checker(self, *args, **kwargs)
777
if (old_checker is not None
778
and getattr(self, u"checker", None) is None):
779
self.PropertyChanged(dbus.String(u"checker_running"),
780
dbus.Boolean(False, variant_level=1))
781
return r
468
782
469
783
## D-Bus methods & signals
470
_interface = u"org.mandos_system.Mandos.Client"
784
_interface = u"se.bsnet.fukt.Mandos.Client"
471
785
472
# BumpTimeout - method
473
BumpTimeout = dbus.service.method(_interface)(bump_timeout)
474
BumpTimeout.__name__ = "BumpTimeout"
786
# CheckedOK - method
787
@dbus.service.method(_interface)
788
def CheckedOK(self):
789
return self.checked_ok()
475
790
476
791
# CheckerCompleted - signal
477
@dbus.service.signal(_interface, signature="bqs")
478
def CheckerCompleted(self, success, condition, command):
792
@dbus.service.signal(_interface, signature=u"nxs")
793
def CheckerCompleted(self, exitcode, waitstatus, command):
479
794
"D-Bus signal"
480
795
pass
481
796
482
797
# CheckerStarted - signal
483
@dbus.service.signal(_interface, signature="s")
798
@dbus.service.signal(_interface, signature=u"s")
484
799
def CheckerStarted(self, command):
485
800
"D-Bus signal"
486
801
pass
487
802
488
# GetAllProperties - method
489
@dbus.service.method(_interface, out_signature="a{sv}")
490
def GetAllProperties(self):
491
"D-Bus method"
492
return dbus.Dictionary({
493
dbus.String("name"):
494
dbus.String(self.name, variant_level=1),
495
dbus.String("fingerprint"):
496
dbus.String(self.fingerprint, variant_level=1),
497
dbus.String("host"):
498
dbus.String(self.host, variant_level=1),
499
dbus.String("created"):
500
_datetime_to_dbus_struct(self.created,
501
variant_level=1),
502
dbus.String("last_started"):
503
(_datetime_to_dbus_struct(self.last_started,
504
variant_level=1)
505
if self.last_started is not None
506
else dbus.Boolean(False, variant_level=1)),
507
dbus.String("started"):
508
dbus.Boolean(self.started, variant_level=1),
509
dbus.String("last_checked_ok"):
510
(_datetime_to_dbus_struct(self.last_checked_ok,
511
variant_level=1)
512
if self.last_checked_ok is not None
513
else dbus.Boolean (False, variant_level=1)),
514
dbus.String("timeout"):
515
dbus.UInt64(self._timeout_milliseconds,
516
variant_level=1),
517
dbus.String("interval"):
518
dbus.UInt64(self._interval_milliseconds,
519
variant_level=1),
520
dbus.String("checker"):
521
dbus.String(self.checker_command,
522
variant_level=1),
523
dbus.String("checker_running"):
524
dbus.Boolean(self.checker is not None,
525
variant_level=1),
526
}, signature="sv")
527
528
# IsStillValid - method
529
IsStillValid = (dbus.service.method(_interface, out_signature="b")
530
(still_valid))
531
IsStillValid.__name__ = "IsStillValid"
532
533
803
# PropertyChanged - signal
534
@dbus.service.signal(_interface, signature="sv")
804
@dbus.service.signal(_interface, signature=u"sv")
535
805
def PropertyChanged(self, property, value):
536
806
"D-Bus signal"
537
807
pass
538
808
539
# SetChecker - method
540
@dbus.service.method(_interface, in_signature="s")
541
def SetChecker(self, checker):
542
"D-Bus setter method"
543
self.checker_command = checker
544
545
# SetHost - method
546
@dbus.service.method(_interface, in_signature="s")
547
def SetHost(self, host):
548
"D-Bus setter method"
549
self.host = host
550
551
# SetInterval - method
552
@dbus.service.method(_interface, in_signature="t")
553
def SetInterval(self, milliseconds):
554
self.interval = datetime.timdeelta(0, 0, 0, milliseconds)
555
556
# SetSecret - method
557
@dbus.service.method(_interface, in_signature="ay",
558
byte_arrays=True)
559
def SetSecret(self, secret):
560
"D-Bus setter method"
561
self.secret = str(secret)
562
563
# SetTimeout - method
564
@dbus.service.method(_interface, in_signature="t")
565
def SetTimeout(self, milliseconds):
566
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
567
568
# Start - method
569
Start = dbus.service.method(_interface)(start)
570
Start.__name__ = "Start"
809
# GotSecret - signal
810
@dbus.service.signal(_interface)
811
def GotSecret(self):
812
"D-Bus signal"
813
pass
814
815
# Rejected - signal
816
@dbus.service.signal(_interface)
817
def Rejected(self):
818
"D-Bus signal"
819
pass
820
821
# Enable - method
822
@dbus.service.method(_interface)
823
def Enable(self):
824
"D-Bus method"
825
self.enable()
571
826
572
827
# StartChecker - method
573
828
@dbus.service.method(_interface)
575
830
"D-Bus method"
576
831
self.start_checker()
577
832
578
# Stop - method
833
# Disable - method
579
834
@dbus.service.method(_interface)
580
def Stop(self):
835
def Disable(self):
581
836
"D-Bus method"
582
self.stop()
837
self.disable()
583
838
584
839
# StopChecker - method
585
StopChecker = dbus.service.method(_interface)(stop_checker)
586
StopChecker.__name__ = "StopChecker"
840
@dbus.service.method(_interface)
841
def StopChecker(self):
842
self.stop_checker()
843
844
# name - property
845
@dbus_service_property(_interface, signature=u"s", access=u"read")
846
def name_dbus_property(self):
847
return dbus.String(self.name)
848
849
# fingerprint - property
850
@dbus_service_property(_interface, signature=u"s", access=u"read")
851
def fingerprint_dbus_property(self):
852
return dbus.String(self.fingerprint)
853
854
# host - property
855
@dbus_service_property(_interface, signature=u"s",
856
access=u"readwrite")
857
def host_dbus_property(self, value=None):
858
if value is None: # get
859
return dbus.String(self.host)
860
self.host = value
861
# Emit D-Bus signal
862
self.PropertyChanged(dbus.String(u"host"),
863
dbus.String(value, variant_level=1))
864
865
# created - property
866
@dbus_service_property(_interface, signature=u"s", access=u"read")
867
def created_dbus_property(self):
868
return dbus.String(self._datetime_to_dbus(self.created))
869
870
# last_enabled - property
871
@dbus_service_property(_interface, signature=u"s", access=u"read")
872
def last_enabled_dbus_property(self):
873
if self.last_enabled is None:
874
return dbus.String(u"")
875
return dbus.String(self._datetime_to_dbus(self.last_enabled))
876
877
# enabled - property
878
@dbus_service_property(_interface, signature=u"b",
879
access=u"readwrite")
880
def enabled_dbus_property(self, value=None):
881
if value is None: # get
882
return dbus.Boolean(self.enabled)
883
if value:
884
self.enable()
885
else:
886
self.disable()
887
888
# last_checked_ok - property
889
@dbus_service_property(_interface, signature=u"s",
890
access=u"readwrite")
891
def last_checked_ok_dbus_property(self, value=None):
892
if value is not None:
893
self.checked_ok()
894
return
895
if self.last_checked_ok is None:
896
return dbus.String(u"")
897
return dbus.String(self._datetime_to_dbus(self
898
.last_checked_ok))
899
900
# timeout - property
901
@dbus_service_property(_interface, signature=u"t",
902
access=u"readwrite")
903
def timeout_dbus_property(self, value=None):
904
if value is None: # get
905
return dbus.UInt64(self.timeout_milliseconds())
906
self.timeout = datetime.timedelta(0, 0, 0, value)
907
# Emit D-Bus signal
908
self.PropertyChanged(dbus.String(u"timeout"),
909
dbus.UInt64(value, variant_level=1))
910
if getattr(self, u"disable_initiator_tag", None) is None:
911
return
912
# Reschedule timeout
913
gobject.source_remove(self.disable_initiator_tag)
914
self.disable_initiator_tag = None
915
time_to_die = (self.
916
_timedelta_to_milliseconds((self
917
.last_checked_ok
918
+ self.timeout)
919
- datetime.datetime
920
.utcnow()))
921
if time_to_die <= 0:
922
# The timeout has passed
923
self.disable()
924
else:
925
self.disable_initiator_tag = (gobject.timeout_add
926
(time_to_die, self.disable))
927
928
# interval - property
929
@dbus_service_property(_interface, signature=u"t",
930
access=u"readwrite")
931
def interval_dbus_property(self, value=None):
932
if value is None: # get
933
return dbus.UInt64(self.interval_milliseconds())
934
self.interval = datetime.timedelta(0, 0, 0, value)
935
# Emit D-Bus signal
936
self.PropertyChanged(dbus.String(u"interval"),
937
dbus.UInt64(value, variant_level=1))
938
if getattr(self, u"checker_initiator_tag", None) is None:
939
return
940
# Reschedule checker run
941
gobject.source_remove(self.checker_initiator_tag)
942
self.checker_initiator_tag = (gobject.timeout_add
943
(value, self.start_checker))
944
self.start_checker() # Start one now, too
945
946
# checker - property
947
@dbus_service_property(_interface, signature=u"s",
948
access=u"readwrite")
949
def checker_dbus_property(self, value=None):
950
if value is None: # get
951
return dbus.String(self.checker_command)
952
self.checker_command = value
953
# Emit D-Bus signal
954
self.PropertyChanged(dbus.String(u"checker"),
955
dbus.String(self.checker_command,
956
variant_level=1))
957
958
# checker_running - property
959
@dbus_service_property(_interface, signature=u"b",
960
access=u"readwrite")
961
def checker_running_dbus_property(self, value=None):
962
if value is None: # get
963
return dbus.Boolean(self.checker is not None)
964
if value:
965
self.start_checker()
966
else:
967
self.stop_checker()
968
969
# object_path - property
970
@dbus_service_property(_interface, signature=u"o", access=u"read")
971
def object_path_dbus_property(self):
972
return self.dbus_object_path # is already a dbus.ObjectPath
973
974
# secret = property
975
@dbus_service_property(_interface, signature=u"ay",
976
access=u"write", byte_arrays=True)
977
def secret_dbus_property(self, value):
978
self.secret = str(value)
587
979
588
980
del _interface
589
981
590
982
591
def peer_certificate(session):
592
"Return the peer's OpenPGP certificate as a bytestring"
593
# If not an OpenPGP certificate...
594
if (gnutls.library.functions
595
.gnutls_certificate_type_get(session._c_object)
596
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
597
# ...do the normal thing
598
return session.peer_certificate
599
list_size = ctypes.c_uint()
600
cert_list = (gnutls.library.functions
601
.gnutls_certificate_get_peers
602
(session._c_object, ctypes.byref(list_size)))
603
if list_size.value == 0:
604
return None
605
cert = cert_list[0]
606
return ctypes.string_at(cert.data, cert.size)
607
608
609
def fingerprint(openpgp):
610
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
611
# New GnuTLS "datum" with the OpenPGP public key
612
datum = (gnutls.library.types
613
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
614
ctypes.POINTER
615
(ctypes.c_ubyte)),
616
ctypes.c_uint(len(openpgp))))
617
# New empty GnuTLS certificate
618
crt = gnutls.library.types.gnutls_openpgp_crt_t()
619
(gnutls.library.functions
620
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
621
# Import the OpenPGP public key into the certificate
622
(gnutls.library.functions
623
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
624
gnutls.library.constants
625
.GNUTLS_OPENPGP_FMT_RAW))
626
# Verify the self signature in the key
627
crtverify = ctypes.c_uint()
628
(gnutls.library.functions
629
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
630
if crtverify.value != 0:
631
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
632
raise gnutls.errors.CertificateSecurityError("Verify failed")
633
# New buffer for the fingerprint
634
buf = ctypes.create_string_buffer(20)
635
buf_len = ctypes.c_size_t()
636
# Get the fingerprint from the certificate into the buffer
637
(gnutls.library.functions
638
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
639
ctypes.byref(buf_len)))
640
# Deinit the certificate
641
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
642
# Convert the buffer to a Python bytestring
643
fpr = ctypes.string_at(buf, buf_len.value)
644
# Convert the bytestring to hexadecimal notation
645
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
646
return hex_fpr
647
648
649
class TCP_handler(SocketServer.BaseRequestHandler, object):
650
"""A TCP request handler class.
651
Instantiated by IPv6_TCPServer for each request to handle it.
983
class ClientHandler(socketserver.BaseRequestHandler, object):
984
"""A class to handle client connections.
985
986
Instantiated once for each connection to handle it.
652
987
Note: This will run in its own forked process."""
653
988
654
989
def handle(self):
655
990
logger.info(u"TCP connection from: %s",
656
991
unicode(self.client_address))
657
session = (gnutls.connection
658
.ClientSession(self.request,
659
gnutls.connection
660
.X509Credentials()))
661
662
line = self.request.makefile().readline()
663
logger.debug(u"Protocol version: %r", line)
664
try:
665
if int(line.strip().split()[0]) > 1:
666
raise RuntimeError
667
except (ValueError, IndexError, RuntimeError), error:
668
logger.error(u"Unknown protocol version: %s", error)
669
return
670
671
# Note: gnutls.connection.X509Credentials is really a generic
672
# GnuTLS certificate credentials object so long as no X.509
673
# keys are added to it. Therefore, we can use it here despite
674
# using OpenPGP certificates.
675
676
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
677
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
678
# "+DHE-DSS"))
679
# Use a fallback default, since this MUST be set.
680
priority = self.server.settings.get("priority", "NORMAL")
681
(gnutls.library.functions
682
.gnutls_priority_set_direct(session._c_object,
683
priority, None))
684
685
try:
686
session.handshake()
687
except gnutls.errors.GNUTLSError, error:
688
logger.warning(u"Handshake failed: %s", error)
689
# Do not run session.bye() here: the session is not
690
# established. Just abandon the request.
691
return
692
try:
693
fpr = fingerprint(peer_certificate(session))
694
except (TypeError, gnutls.errors.GNUTLSError), error:
695
logger.warning(u"Bad certificate: %s", error)
696
session.bye()
697
return
698
logger.debug(u"Fingerprint: %s", fpr)
699
for c in self.server.clients:
700
if c.fingerprint == fpr:
701
client = c
702
break
703
else:
704
logger.warning(u"Client not found for fingerprint: %s",
705
fpr)
706
session.bye()
707
return
708
# Have to check if client.still_valid(), since it is possible
709
# that the client timed out while establishing the GnuTLS
710
# session.
711
if not client.still_valid():
712
logger.warning(u"Client %(name)s is invalid",
713
vars(client))
714
session.bye()
715
return
716
## This won't work here, since we're in a fork.
717
# client.bump_timeout()
718
sent_size = 0
719
while sent_size < len(client.secret):
720
sent = session.send(client.secret[sent_size:])
721
logger.debug(u"Sent: %d, remaining: %d",
722
sent, len(client.secret)
723
- (sent_size + sent))
724
sent_size += sent
725
session.bye()
726
727
728
class IPv6_TCPServer(SocketServer.ForkingMixIn,
729
SocketServer.TCPServer, object):
730
"""IPv6 TCP server. Accepts 'None' as address and/or port.
992
logger.debug(u"IPC Pipe FD: %d", self.server.child_pipe[1])
993
# Open IPC pipe to parent process
994
with contextlib.nested(os.fdopen(self.server.child_pipe[1],
995
u"w", 1),
996
os.fdopen(self.server.parent_pipe[0],
997
u"r", 0)) as (ipc,
998
ipc_return):
999
session = (gnutls.connection
1000
.ClientSession(self.request,
1001
gnutls.connection
1002
.X509Credentials()))
1003
1004
line = self.request.makefile().readline()
1005
logger.debug(u"Protocol version: %r", line)
1006
try:
1007
if int(line.strip().split()[0]) > 1:
1008
raise RuntimeError
1009
except (ValueError, IndexError, RuntimeError), error:
1010
logger.error(u"Unknown protocol version: %s", error)
1011
return
1012
1013
# Note: gnutls.connection.X509Credentials is really a
1014
# generic GnuTLS certificate credentials object so long as
1015
# no X.509 keys are added to it. Therefore, we can use it
1016
# here despite using OpenPGP certificates.
1017
1018
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1019
# u"+AES-256-CBC", u"+SHA1",
1020
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1021
# u"+DHE-DSS"))
1022
# Use a fallback default, since this MUST be set.
1023
priority = self.server.gnutls_priority
1024
if priority is None:
1025
priority = u"NORMAL"
1026
(gnutls.library.functions
1027
.gnutls_priority_set_direct(session._c_object,
1028
priority, None))
1029
1030
try:
1031
session.handshake()
1032
except gnutls.errors.GNUTLSError, error:
1033
logger.warning(u"Handshake failed: %s", error)
1034
# Do not run session.bye() here: the session is not
1035
# established. Just abandon the request.
1036
return
1037
logger.debug(u"Handshake succeeded")
1038
try:
1039
try:
1040
fpr = self.fingerprint(self.peer_certificate
1041
(session))
1042
except (TypeError, gnutls.errors.GNUTLSError), error:
1043
logger.warning(u"Bad certificate: %s", error)
1044
return
1045
logger.debug(u"Fingerprint: %s", fpr)
1046
1047
for c in self.server.clients:
1048
if c.fingerprint == fpr:
1049
client = c
1050
break
1051
else:
1052
ipc.write(u"NOTFOUND %s %s\n"
1053
% (fpr, unicode(self.client_address)))
1054
return
1055
# Have to check if client.enabled, since it is
1056
# possible that the client was disabled since the
1057
# GnuTLS session was established.
1058
ipc.write(u"GETATTR enabled %s\n" % fpr)
1059
enabled = pickle.load(ipc_return)
1060
if not enabled:
1061
ipc.write(u"DISABLED %s\n" % client.name)
1062
return
1063
ipc.write(u"SENDING %s\n" % client.name)
1064
sent_size = 0
1065
while sent_size < len(client.secret):
1066
sent = session.send(client.secret[sent_size:])
1067
logger.debug(u"Sent: %d, remaining: %d",
1068
sent, len(client.secret)
1069
- (sent_size + sent))
1070
sent_size += sent
1071
finally:
1072
session.bye()
1073
1074
@staticmethod
1075
def peer_certificate(session):
1076
"Return the peer's OpenPGP certificate as a bytestring"
1077
# If not an OpenPGP certificate...
1078
if (gnutls.library.functions
1079
.gnutls_certificate_type_get(session._c_object)
1080
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1081
# ...do the normal thing
1082
return session.peer_certificate
1083
list_size = ctypes.c_uint(1)
1084
cert_list = (gnutls.library.functions
1085
.gnutls_certificate_get_peers
1086
(session._c_object, ctypes.byref(list_size)))
1087
if not bool(cert_list) and list_size.value != 0:
1088
raise gnutls.errors.GNUTLSError(u"error getting peer"
1089
u" certificate")
1090
if list_size.value == 0:
1091
return None
1092
cert = cert_list[0]
1093
return ctypes.string_at(cert.data, cert.size)
1094
1095
@staticmethod
1096
def fingerprint(openpgp):
1097
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1098
# New GnuTLS "datum" with the OpenPGP public key
1099
datum = (gnutls.library.types
1100
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1101
ctypes.POINTER
1102
(ctypes.c_ubyte)),
1103
ctypes.c_uint(len(openpgp))))
1104
# New empty GnuTLS certificate
1105
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1106
(gnutls.library.functions
1107
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1108
# Import the OpenPGP public key into the certificate
1109
(gnutls.library.functions
1110
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1111
gnutls.library.constants
1112
.GNUTLS_OPENPGP_FMT_RAW))
1113
# Verify the self signature in the key
1114
crtverify = ctypes.c_uint()
1115
(gnutls.library.functions
1116
.gnutls_openpgp_crt_verify_self(crt, 0,
1117
ctypes.byref(crtverify)))
1118
if crtverify.value != 0:
1119
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1120
raise (gnutls.errors.CertificateSecurityError
1121
(u"Verify failed"))
1122
# New buffer for the fingerprint
1123
buf = ctypes.create_string_buffer(20)
1124
buf_len = ctypes.c_size_t()
1125
# Get the fingerprint from the certificate into the buffer
1126
(gnutls.library.functions
1127
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1128
ctypes.byref(buf_len)))
1129
# Deinit the certificate
1130
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1131
# Convert the buffer to a Python bytestring
1132
fpr = ctypes.string_at(buf, buf_len.value)
1133
# Convert the bytestring to hexadecimal notation
1134
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1135
return hex_fpr
1136
1137
1138
class ForkingMixInWithPipes(socketserver.ForkingMixIn, object):
1139
"""Like socketserver.ForkingMixIn, but also pass a pipe pair."""
1140
def process_request(self, request, client_address):
1141
"""Overrides and wraps the original process_request().
1142
1143
This function creates a new pipe in self.pipe
1144
"""
1145
self.child_pipe = os.pipe() # Child writes here
1146
self.parent_pipe = os.pipe() # Parent writes here
1147
super(ForkingMixInWithPipes,
1148
self).process_request(request, client_address)
1149
# Close unused ends for parent
1150
os.close(self.parent_pipe[0]) # close read end
1151
os.close(self.child_pipe[1]) # close write end
1152
self.add_pipe_fds(self.child_pipe[0], self.parent_pipe[1])
1153
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1154
"""Dummy function; override as necessary"""
1155
os.close(child_pipe_fd)
1156
os.close(parent_pipe_fd)
1157
1158
1159
class IPv6_TCPServer(ForkingMixInWithPipes,
1160
socketserver.TCPServer, object):
1161
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1162
731
1163
Attributes:
732
settings: Server settings
733
clients: Set() of Client objects
734
1164
enabled: Boolean; whether this server is activated yet
1165
interface: None or a network interface name (string)
1166
use_ipv6: Boolean; to use IPv6 or not
735
1167
"""
736
address_family = socket.AF_INET6
737
def __init__(self, *args, **kwargs):
738
if "settings" in kwargs:
739
self.settings = kwargs["settings"]
740
del kwargs["settings"]
741
if "clients" in kwargs:
742
self.clients = kwargs["clients"]
743
del kwargs["clients"]
744
self.enabled = False
745
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1168
def __init__(self, server_address, RequestHandlerClass,
1169
interface=None, use_ipv6=True):
1170
self.interface = interface
1171
if use_ipv6:
1172
self.address_family = socket.AF_INET6
1173
socketserver.TCPServer.__init__(self, server_address,
1174
RequestHandlerClass)
746
1175
def server_bind(self):
747
1176
"""This overrides the normal server_bind() function
748
1177
to bind to an interface if one was specified, and also NOT to
749
1178
bind to an address or port if they were not specified."""
750
if self.settings["interface"]:
751
# 25 is from /usr/include/asm-i486/socket.h
752
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
753
try:
754
self.socket.setsockopt(socket.SOL_SOCKET,
755
SO_BINDTODEVICE,
756
self.settings["interface"])
757
except socket.error, error:
758
if error[0] == errno.EPERM:
759
logger.error(u"No permission to"
760
u" bind to interface %s",
761
self.settings["interface"])
762
else:
763
raise error
1179
if self.interface is not None:
1180
if SO_BINDTODEVICE is None:
1181
logger.error(u"SO_BINDTODEVICE does not exist;"
1182
u" cannot bind to interface %s",
1183
self.interface)
1184
else:
1185
try:
1186
self.socket.setsockopt(socket.SOL_SOCKET,
1187
SO_BINDTODEVICE,
1188
str(self.interface
1189
+ u'\0'))
1190
except socket.error, error:
1191
if error[0] == errno.EPERM:
1192
logger.error(u"No permission to"
1193
u" bind to interface %s",
1194
self.interface)
1195
elif error[0] == errno.ENOPROTOOPT:
1196
logger.error(u"SO_BINDTODEVICE not available;"
1197
u" cannot bind to interface %s",
1198
self.interface)
1199
else:
1200
raise
764
1201
# Only bind(2) the socket if we really need to.
765
1202
if self.server_address[0] or self.server_address[1]:
766
1203
if not self.server_address[0]:
767
in6addr_any = "::"
768
self.server_address = (in6addr_any,
1204
if self.address_family == socket.AF_INET6:
1205
any_address = u"::" # in6addr_any
1206
else:
1207
any_address = socket.INADDR_ANY
1208
self.server_address = (any_address,
769
1209
self.server_address[1])
770
1210
elif not self.server_address[1]:
771
1211
self.server_address = (self.server_address[0],
772
1212
0)
773
# if self.settings["interface"]:
1213
# if self.interface:
774
1214
# self.server_address = (self.server_address[0],
775
1215
# 0, # port
776
1216
# 0, # flowinfo
777
1217
# if_nametoindex
778
# (self.settings
779
# ["interface"]))
780
return super(IPv6_TCPServer, self).server_bind()
1218
# (self.interface))
1219
return socketserver.TCPServer.server_bind(self)
1220
1221
1222
class MandosServer(IPv6_TCPServer):
1223
"""Mandos server.
1224
1225
Attributes:
1226
clients: set of Client objects
1227
gnutls_priority GnuTLS priority string
1228
use_dbus: Boolean; to emit D-Bus signals or not
1229
1230
Assumes a gobject.MainLoop event loop.
1231
"""
1232
def __init__(self, server_address, RequestHandlerClass,
1233
interface=None, use_ipv6=True, clients=None,
1234
gnutls_priority=None, use_dbus=True):
1235
self.enabled = False
1236
self.clients = clients
1237
if self.clients is None:
1238
self.clients = set()
1239
self.use_dbus = use_dbus
1240
self.gnutls_priority = gnutls_priority
1241
IPv6_TCPServer.__init__(self, server_address,
1242
RequestHandlerClass,
1243
interface = interface,
1244
use_ipv6 = use_ipv6)
781
1245
def server_activate(self):
782
1246
if self.enabled:
783
return super(IPv6_TCPServer, self).server_activate()
1247
return socketserver.TCPServer.server_activate(self)
784
1248
def enable(self):
785
1249
self.enabled = True
1250
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1251
# Call "handle_ipc" for both data and EOF events
1252
gobject.io_add_watch(child_pipe_fd,
1253
gobject.IO_IN | gobject.IO_HUP,
1254
functools.partial(self.handle_ipc,
1255
reply_fd
1256
=parent_pipe_fd))
1257
def handle_ipc(self, source, condition, reply_fd=None,
1258
file_objects={}):
1259
condition_names = {
1260
gobject.IO_IN: u"IN", # There is data to read.
1261
gobject.IO_OUT: u"OUT", # Data can be written (without
1262
# blocking).
1263
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1264
gobject.IO_ERR: u"ERR", # Error condition.
1265
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1266
# broken, usually for pipes and
1267
# sockets).
1268
}
1269
conditions_string = ' | '.join(name
1270
for cond, name in
1271
condition_names.iteritems()
1272
if cond & condition)
1273
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1274
conditions_string)
1275
1276
# Turn the pipe file descriptors into Python file objects
1277
if source not in file_objects:
1278
file_objects[source] = os.fdopen(source, u"r", 1)
1279
if reply_fd not in file_objects:
1280
file_objects[reply_fd] = os.fdopen(reply_fd, u"w", 0)
1281
1282
# Read a line from the file object
1283
cmdline = file_objects[source].readline()
1284
if not cmdline: # Empty line means end of file
1285
# close the IPC pipes
1286
file_objects[source].close()
1287
del file_objects[source]
1288
file_objects[reply_fd].close()
1289
del file_objects[reply_fd]
1290
1291
# Stop calling this function
1292
return False
1293
1294
logger.debug(u"IPC command: %r", cmdline)
1295
1296
# Parse and act on command
1297
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1298
1299
if cmd == u"NOTFOUND":
1300
fpr, address = args.split(None, 1)
1301
logger.warning(u"Client not found for fingerprint: %s, ad"
1302
u"dress: %s", fpr, address)
1303
if self.use_dbus:
1304
# Emit D-Bus signal
1305
mandos_dbus_service.ClientNotFound(fpr, address)
1306
elif cmd == u"DISABLED":
1307
for client in self.clients:
1308
if client.name == args:
1309
logger.warning(u"Client %s is disabled", args)
1310
if self.use_dbus:
1311
# Emit D-Bus signal
1312
client.Rejected()
1313
break
1314
else:
1315
logger.error(u"Unknown client %s is disabled", args)
1316
elif cmd == u"SENDING":
1317
for client in self.clients:
1318
if client.name == args:
1319
logger.info(u"Sending secret to %s", client.name)
1320
client.checked_ok()
1321
if self.use_dbus:
1322
# Emit D-Bus signal
1323
client.GotSecret()
1324
break
1325
else:
1326
logger.error(u"Sending secret to unknown client %s",
1327
args)
1328
elif cmd == u"GETATTR":
1329
attr_name, fpr = args.split(None, 1)
1330
for client in self.clients:
1331
if client.fingerprint == fpr:
1332
attr_value = getattr(client, attr_name, None)
1333
logger.debug("IPC reply: %r", attr_value)
1334
pickle.dump(attr_value, file_objects[reply_fd])
1335
break
1336
else:
1337
logger.error(u"Client %s on address %s requesting "
1338
u"attribute %s not found", fpr, address,
1339
attr_name)
1340
pickle.dump(None, file_objects[reply_fd])
1341
else:
1342
logger.error(u"Unknown IPC command: %r", cmdline)
1343
1344
# Keep calling this function
1345
return True
786
1346
787
1347
788
1348
def string_to_delta(interval):
789
1349
"""Parse a string and return a datetime.timedelta
790
791
>>> string_to_delta('7d')
1350
1351
>>> string_to_delta(u'7d')
792
1352
datetime.timedelta(7)
793
>>> string_to_delta('60s')
1353
>>> string_to_delta(u'60s')
794
1354
datetime.timedelta(0, 60)
795
>>> string_to_delta('60m')
1355
>>> string_to_delta(u'60m')
796
1356
datetime.timedelta(0, 3600)
797
>>> string_to_delta('24h')
1357
>>> string_to_delta(u'24h')
798
1358
datetime.timedelta(1)
799
1359
>>> string_to_delta(u'1w')
800
1360
datetime.timedelta(7)
801
>>> string_to_delta('5m 30s')
1361
>>> string_to_delta(u'5m 30s')
802
1362
datetime.timedelta(0, 330)
803
1363
"""
804
1364
timevalue = datetime.timedelta(0)
817
1377
elif suffix == u"w":
818
1378
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
819
1379
else:
820
raise ValueError
821
except (ValueError, IndexError):
822
raise ValueError
1380
raise ValueError(u"Unknown suffix %r" % suffix)
1381
except (ValueError, IndexError), e:
1382
raise ValueError(e.message)
823
1383
timevalue += delta
824
1384
return timevalue
825
1385
826
1386
827
def server_state_changed(state):
828
"""Derived from the Avahi example code"""
829
if state == avahi.SERVER_COLLISION:
830
logger.error(u"Zeroconf server name collision")
831
service.remove()
832
elif state == avahi.SERVER_RUNNING:
833
service.add()
834
835
836
def entry_group_state_changed(state, error):
837
"""Derived from the Avahi example code"""
838
logger.debug(u"Avahi state change: %i", state)
839
840
if state == avahi.ENTRY_GROUP_ESTABLISHED:
841
logger.debug(u"Zeroconf service established.")
842
elif state == avahi.ENTRY_GROUP_COLLISION:
843
logger.warning(u"Zeroconf service name collision.")
844
service.rename()
845
elif state == avahi.ENTRY_GROUP_FAILURE:
846
logger.critical(u"Avahi: Error in group state changed %s",
847
unicode(error))
848
raise AvahiGroupError("State changed: %s", str(error))
849
850
1387
def if_nametoindex(interface):
851
"""Call the C function if_nametoindex(), or equivalent"""
1388
"""Call the C function if_nametoindex(), or equivalent
1389
1390
Note: This function cannot accept a unicode string."""
852
1391
global if_nametoindex
853
1392
try:
854
1393
if_nametoindex = (ctypes.cdll.LoadLibrary
855
(ctypes.util.find_library("c"))
1394
(ctypes.util.find_library(u"c"))
856
1395
.if_nametoindex)
857
1396
except (OSError, AttributeError):
858
if "struct" not in sys.modules:
859
import struct
860
if "fcntl" not in sys.modules:
861
import fcntl
1397
logger.warning(u"Doing if_nametoindex the hard way")
862
1398
def if_nametoindex(interface):
863
1399
"Get an interface index the hard way, i.e. using fcntl()"
864
1400
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
865
with closing(socket.socket()) as s:
1401
with contextlib.closing(socket.socket()) as s:
866
1402
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
867
struct.pack("16s16x", interface))
868
interface_index = struct.unpack("I", ifreq[16:20])[0]
1403
struct.pack(str(u"16s16x"),
1404
interface))
1405
interface_index = struct.unpack(str(u"I"),
1406
ifreq[16:20])[0]
869
1407
return interface_index
870
1408
return if_nametoindex(interface)
871
1409
872
1410
873
1411
def daemon(nochdir = False, noclose = False):
874
1412
"""See daemon(3). Standard BSD Unix function.
1413
875
1414
This should really exist as os.daemon, but it doesn't (yet)."""
876
1415
if os.fork():
877
1416
sys.exit()
878
1417
os.setsid()
879
1418
if not nochdir:
880
os.chdir("/")
1419
os.chdir(u"/")
881
1420
if os.fork():
882
1421
sys.exit()
883
1422
if not noclose:
885
1424
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
886
1425
if not stat.S_ISCHR(os.fstat(null).st_mode):
887
1426
raise OSError(errno.ENODEV,
888
"/dev/null not a character device")
1427
u"%s not a character device"
1428
% os.path.devnull)
889
1429
os.dup2(null, sys.stdin.fileno())
890
1430
os.dup2(null, sys.stdout.fileno())
891
1431
os.dup2(null, sys.stderr.fileno())
894
1434
895
1435
896
1436
def main():
897
parser = OptionParser(version = "%%prog %s" % version)
898
parser.add_option("-i", "--interface", type="string",
899
metavar="IF", help="Bind to interface IF")
900
parser.add_option("-a", "--address", type="string",
901
help="Address to listen for requests on")
902
parser.add_option("-p", "--port", type="int",
903
help="Port number to receive requests on")
904
parser.add_option("--check", action="store_true", default=False,
905
help="Run self-test")
906
parser.add_option("--debug", action="store_true",
907
help="Debug mode; run in foreground and log to"
908
" terminal")
909
parser.add_option("--priority", type="string", help="GnuTLS"
910
" priority string (see GnuTLS documentation)")
911
parser.add_option("--servicename", type="string", metavar="NAME",
912
help="Zeroconf service name")
913
parser.add_option("--configdir", type="string",
914
default="/etc/mandos", metavar="DIR",
915
help="Directory to search for configuration"
916
" files")
1437
1438
##################################################################
1439
# Parsing of options, both command line and config file
1440
1441
parser = optparse.OptionParser(version = "%%prog %s" % version)
1442
parser.add_option("-i", u"--interface", type=u"string",
1443
metavar="IF", help=u"Bind to interface IF")
1444
parser.add_option("-a", u"--address", type=u"string",
1445
help=u"Address to listen for requests on")
1446
parser.add_option("-p", u"--port", type=u"int",
1447
help=u"Port number to receive requests on")
1448
parser.add_option("--check", action=u"store_true",
1449
help=u"Run self-test")
1450
parser.add_option("--debug", action=u"store_true",
1451
help=u"Debug mode; run in foreground and log to"
1452
u" terminal")
1453
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1454
u" priority string (see GnuTLS documentation)")
1455
parser.add_option("--servicename", type=u"string",
1456
metavar=u"NAME", help=u"Zeroconf service name")
1457
parser.add_option("--configdir", type=u"string",
1458
default=u"/etc/mandos", metavar=u"DIR",
1459
help=u"Directory to search for configuration"
1460
u" files")
1461
parser.add_option("--no-dbus", action=u"store_false",
1462
dest=u"use_dbus", help=u"Do not provide D-Bus"
1463
u" system bus interface")
1464
parser.add_option("--no-ipv6", action=u"store_false",
1465
dest=u"use_ipv6", help=u"Do not use IPv6")
917
1466
options = parser.parse_args()[0]
918
1467
919
1468
if options.check:
922
1471
sys.exit()
923
1472
924
1473
# Default values for config file for server-global settings
925
server_defaults = { "interface": "",
926
"address": "",
927
"port": "",
928
"debug": "False",
929
"priority":
930
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
931
"servicename": "Mandos",
1474
server_defaults = { u"interface": u"",
1475
u"address": u"",
1476
u"port": u"",
1477
u"debug": u"False",
1478
u"priority":
1479
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1480
u"servicename": u"Mandos",
1481
u"use_dbus": u"True",
1482
u"use_ipv6": u"True",
932
1483
}
933
1484
934
1485
# Parse config file for server-global settings
935
server_config = ConfigParser.SafeConfigParser(server_defaults)
1486
server_config = configparser.SafeConfigParser(server_defaults)
936
1487
del server_defaults
937
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1488
server_config.read(os.path.join(options.configdir,
1489
u"mandos.conf"))
938
1490
# Convert the SafeConfigParser object to a dict
939
1491
server_settings = server_config.defaults()
940
# Use getboolean on the boolean config option
941
server_settings["debug"] = (server_config.getboolean
942
("DEFAULT", "debug"))
1492
# Use the appropriate methods on the non-string config options
1493
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1494
server_settings[option] = server_config.getboolean(u"DEFAULT",
1495
option)
1496
if server_settings["port"]:
1497
server_settings["port"] = server_config.getint(u"DEFAULT",
1498
u"port")
943
1499
del server_config
944
1500
945
1501
# Override the settings from the config file with command line
946
1502
# options, if set.
947
for option in ("interface", "address", "port", "debug",
948
"priority", "servicename", "configdir"):
1503
for option in (u"interface", u"address", u"port", u"debug",
1504
u"priority", u"servicename", u"configdir",
1505
u"use_dbus", u"use_ipv6"):
949
1506
value = getattr(options, option)
950
1507
if value is not None:
951
1508
server_settings[option] = value
952
1509
del options
1510
# Force all strings to be unicode
1511
for option in server_settings.keys():
1512
if type(server_settings[option]) is str:
1513
server_settings[option] = unicode(server_settings[option])
953
1514
# Now we have our good server settings in "server_settings"
954
1515
955
debug = server_settings["debug"]
1516
##################################################################
1517
1518
# For convenience
1519
debug = server_settings[u"debug"]
1520
use_dbus = server_settings[u"use_dbus"]
1521
use_ipv6 = server_settings[u"use_ipv6"]
956
1522
957
1523
if not debug:
958
1524
syslogger.setLevel(logging.WARNING)
959
1525
console.setLevel(logging.WARNING)
960
1526
961
if server_settings["servicename"] != "Mandos":
1527
if server_settings[u"servicename"] != u"Mandos":
962
1528
syslogger.setFormatter(logging.Formatter
963
('Mandos (%s): %%(levelname)s:'
964
' %%(message)s'
965
% server_settings["servicename"]))
1529
(u'Mandos (%s) [%%(process)d]:'
1530
u' %%(levelname)s: %%(message)s'
1531
% server_settings[u"servicename"]))
966
1532
967
1533
# Parse config file with clients
968
client_defaults = { "timeout": "1h",
969
"interval": "5m",
970
"checker": "fping -q -- %(host)s",
971
"host": "",
1534
client_defaults = { u"timeout": u"1h",
1535
u"interval": u"5m",
1536
u"checker": u"fping -q -- %%(host)s",
1537
u"host": u"",
972
1538
}
973
client_config = ConfigParser.SafeConfigParser(client_defaults)
974
client_config.read(os.path.join(server_settings["configdir"],
975
"clients.conf"))
976
977
clients = Set()
978
tcp_server = IPv6_TCPServer((server_settings["address"],
979
server_settings["port"]),
980
TCP_handler,
981
settings=server_settings,
982
clients=clients)
983
pidfilename = "/var/run/mandos.pid"
984
try:
985
pidfile = open(pidfilename, "w")
986
except IOError, error:
987
logger.error("Could not open file %r", pidfilename)
988
989
try:
990
uid = pwd.getpwnam("_mandos").pw_uid
1539
client_config = configparser.SafeConfigParser(client_defaults)
1540
client_config.read(os.path.join(server_settings[u"configdir"],
1541
u"clients.conf"))
1542
1543
global mandos_dbus_service
1544
mandos_dbus_service = None
1545
1546
tcp_server = MandosServer((server_settings[u"address"],
1547
server_settings[u"port"]),
1548
ClientHandler,
1549
interface=server_settings[u"interface"],
1550
use_ipv6=use_ipv6,
1551
gnutls_priority=
1552
server_settings[u"priority"],
1553
use_dbus=use_dbus)
1554
pidfilename = u"/var/run/mandos.pid"
1555
try:
1556
pidfile = open(pidfilename, u"w")
1557
except IOError:
1558
logger.error(u"Could not open file %r", pidfilename)
1559
1560
try:
1561
uid = pwd.getpwnam(u"_mandos").pw_uid
1562
gid = pwd.getpwnam(u"_mandos").pw_gid
991
1563
except KeyError:
992
1564
try:
993
uid = pwd.getpwnam("mandos").pw_uid
1565
uid = pwd.getpwnam(u"mandos").pw_uid
1566
gid = pwd.getpwnam(u"mandos").pw_gid
994
1567
except KeyError:
995
1568
try:
996
uid = pwd.getpwnam("nobody").pw_uid
1569
uid = pwd.getpwnam(u"nobody").pw_uid
1570
gid = pwd.getpwnam(u"nobody").pw_gid
997
1571
except KeyError:
998
1572
uid = 65534
999
try:
1000
gid = pwd.getpwnam("_mandos").pw_gid
1001
except KeyError:
1002
try:
1003
gid = pwd.getpwnam("mandos").pw_gid
1004
except KeyError:
1005
try:
1006
gid = pwd.getpwnam("nogroup").pw_gid
1007
except KeyError:
1008
1573
gid = 65534
1009
1574
try:
1575
os.setgid(gid)
1010
1576
os.setuid(uid)
1011
os.setgid(gid)
1012
1577
except OSError, error:
1013
1578
if error[0] != errno.EPERM:
1014
1579
raise error
1015
1580
1016
global service
1017
service = AvahiService(name = server_settings["servicename"],
1018
servicetype = "_mandos._tcp", )
1019
if server_settings["interface"]:
1020
service.interface = (if_nametoindex
1021
(server_settings["interface"]))
1581
# Enable all possible GnuTLS debugging
1582
if debug:
1583
# "Use a log level over 10 to enable all debugging options."
1584
# - GnuTLS manual
1585
gnutls.library.functions.gnutls_global_set_log_level(11)
1586
1587
@gnutls.library.types.gnutls_log_func
1588
def debug_gnutls(level, string):
1589
logger.debug(u"GnuTLS: %s", string[:-1])
1590
1591
(gnutls.library.functions
1592
.gnutls_global_set_log_function(debug_gnutls))
1022
1593
1023
1594
global main_loop
1024
global bus
1025
global server
1026
1595
# From the Avahi example code
1027
1596
DBusGMainLoop(set_as_default=True )
1028
1597
main_loop = gobject.MainLoop()
1029
1598
bus = dbus.SystemBus()
1030
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1031
avahi.DBUS_PATH_SERVER),
1032
avahi.DBUS_INTERFACE_SERVER)
1033
1599
# End of Avahi example code
1034
bus_name = dbus.service.BusName(u"org.mandos-system.Mandos", bus)
1600
if use_dbus:
1601
try:
1602
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1603
bus, do_not_queue=True)
1604
except dbus.exceptions.NameExistsException, e:
1605
logger.error(unicode(e) + u", disabling D-Bus")
1606
use_dbus = False
1607
server_settings[u"use_dbus"] = False
1608
tcp_server.use_dbus = False
1609
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1610
service = AvahiService(name = server_settings[u"servicename"],
1611
servicetype = u"_mandos._tcp",
1612
protocol = protocol, bus = bus)
1613
if server_settings["interface"]:
1614
service.interface = (if_nametoindex
1615
(str(server_settings[u"interface"])))
1035
1616
1036
clients.update(Set(Client(name = section,
1037
config
1038
= dict(client_config.items(section)))
1039
for section in client_config.sections()))
1040
if not clients:
1041
logger.critical(u"No clients defined")
1042
sys.exit(1)
1617
client_class = Client
1618
if use_dbus:
1619
client_class = functools.partial(ClientDBus, bus = bus)
1620
tcp_server.clients.update(set(
1621
client_class(name = section,
1622
config= dict(client_config.items(section)))
1623
for section in client_config.sections()))
1624
if not tcp_server.clients:
1625
logger.warning(u"No clients defined")
1043
1626
1044
1627
if debug:
1045
1628
# Redirect stdin so all checkers get /dev/null
1054
1637
daemon()
1055
1638
1056
1639
try:
1057
pid = os.getpid()
1058
pidfile.write(str(pid) + "\n")
1059
pidfile.close()
1640
with pidfile:
1641
pid = os.getpid()
1642
pidfile.write(str(pid) + "\n")
1060
1643
del pidfile
1061
1644
except IOError:
1062
1645
logger.error(u"Could not write to file %r with PID %d",
1066
1649
pass
1067
1650
del pidfilename
1068
1651
1652
if not debug:
1653
signal.signal(signal.SIGINT, signal.SIG_IGN)
1654
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1655
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1656
1657
if use_dbus:
1658
class MandosDBusService(dbus.service.Object):
1659
"""A D-Bus proxy object"""
1660
def __init__(self):
1661
dbus.service.Object.__init__(self, bus, u"/")
1662
_interface = u"se.bsnet.fukt.Mandos"
1663
1664
@dbus.service.signal(_interface, signature=u"o")
1665
def ClientAdded(self, objpath):
1666
"D-Bus signal"
1667
pass
1668
1669
@dbus.service.signal(_interface, signature=u"ss")
1670
def ClientNotFound(self, fingerprint, address):
1671
"D-Bus signal"
1672
pass
1673
1674
@dbus.service.signal(_interface, signature=u"os")
1675
def ClientRemoved(self, objpath, name):
1676
"D-Bus signal"
1677
pass
1678
1679
@dbus.service.method(_interface, out_signature=u"ao")
1680
def GetAllClients(self):
1681
"D-Bus method"
1682
return dbus.Array(c.dbus_object_path
1683
for c in tcp_server.clients)
1684
1685
@dbus.service.method(_interface,
1686
out_signature=u"a{oa{sv}}")
1687
def GetAllClientsWithProperties(self):
1688
"D-Bus method"
1689
return dbus.Dictionary(
1690
((c.dbus_object_path, c.GetAll(u""))
1691
for c in tcp_server.clients),
1692
signature=u"oa{sv}")
1693
1694
@dbus.service.method(_interface, in_signature=u"o")
1695
def RemoveClient(self, object_path):
1696
"D-Bus method"
1697
for c in tcp_server.clients:
1698
if c.dbus_object_path == object_path:
1699
tcp_server.clients.remove(c)
1700
c.remove_from_connection()
1701
# Don't signal anything except ClientRemoved
1702
c.disable(quiet=True)
1703
# Emit D-Bus signal
1704
self.ClientRemoved(object_path, c.name)
1705
return
1706
raise KeyError(object_path)
1707
1708
del _interface
1709
1710
mandos_dbus_service = MandosDBusService()
1711
1069
1712
def cleanup():
1070
1713
"Cleanup function; run on exit"
1071
global group
1072
# From the Avahi example code
1073
if not group is None:
1074
group.Free()
1075
group = None
1076
# End of Avahi example code
1714
service.cleanup()
1077
1715
1078
while clients:
1079
client = clients.pop()
1080
client.stop_hook = None
1081
client.stop()
1716
while tcp_server.clients:
1717
client = tcp_server.clients.pop()
1718
if use_dbus:
1719
client.remove_from_connection()
1720
client.disable_hook = None
1721
# Don't signal anything except ClientRemoved
1722
client.disable(quiet=True)
1723
if use_dbus:
1724
# Emit D-Bus signal
1725
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1726
client.name)
1082
1727
1083
1728
atexit.register(cleanup)
1084
1729
1085
if not debug:
1086
signal.signal(signal.SIGINT, signal.SIG_IGN)
1087
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1088
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1089
1090
class MandosServer(dbus.service.Object):
1091
"""A D-Bus proxy object"""
1092
def __init__(self):
1093
dbus.service.Object.__init__(self, bus,
1094
"/Mandos")
1095
_interface = u"org.mandos_system.Mandos"
1096
1097
@dbus.service.signal(_interface, signature="oa{sv}")
1098
def ClientAdded(self, objpath, properties):
1099
"D-Bus signal"
1100
pass
1101
1102
@dbus.service.signal(_interface, signature="o")
1103
def ClientRemoved(self, objpath):
1104
"D-Bus signal"
1105
pass
1106
1107
@dbus.service.method(_interface, out_signature="ao")
1108
def GetAllClients(self):
1109
return dbus.Array(c.dbus_object_path for c in clients)
1110
1111
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1112
def GetAllClientsWithProperties(self):
1113
return dbus.Dictionary(
1114
((c.dbus_object_path, c.GetAllProperties())
1115
for c in clients),
1116
signature="oa{sv}")
1117
1118
@dbus.service.method(_interface, in_signature="o")
1119
def RemoveClient(self, object_path):
1120
for c in clients:
1121
if c.dbus_object_path == object_path:
1122
c.stop()
1123
clients.remove(c)
1124
return
1125
raise KeyError
1126
1127
del _interface
1128
1129
mandos_server = MandosServer()
1130
1131
for client in clients:
1132
# Emit D-Bus signal
1133
mandos_server.ClientAdded(client.dbus_object_path,
1134
client.GetAllProperties())
1135
client.start()
1730
for client in tcp_server.clients:
1731
if use_dbus:
1732
# Emit D-Bus signal
1733
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1734
client.enable()
1136
1735
1137
1736
tcp_server.enable()
1138
1737
tcp_server.server_activate()
1139
1738
1140
1739
# Find out what port we got
1141
1740
service.port = tcp_server.socket.getsockname()[1]
1142
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1143
u" scope_id %d" % tcp_server.socket.getsockname())
1741
if use_ipv6:
1742
logger.info(u"Now listening on address %r, port %d,"
1743
" flowinfo %d, scope_id %d"
1744
% tcp_server.socket.getsockname())
1745
else: # IPv4
1746
logger.info(u"Now listening on address %r, port %d"
1747
% tcp_server.socket.getsockname())
1144
1748
1145
1749
#service.interface = tcp_server.socket.getsockname()[3]
1146
1750
1147
1751
try:
1148
1752
# From the Avahi example code
1149
server.connect_to_signal("StateChanged", server_state_changed)
1150
1753
try:
1151
server_state_changed(server.GetState())
1754
service.activate()
1152
1755
except dbus.exceptions.DBusException, error:
1153
1756
logger.critical(u"DBusException: %s", error)
1757
cleanup()
1154
1758
sys.exit(1)
1155
1759
# End of Avahi example code
1156
1760
1162
1766
logger.debug(u"Starting main loop")
1163
1767
main_loop.run()
1164
1768
except AvahiError, error:
1165
logger.critical(u"AvahiError: %s" + unicode(error))
1769
logger.critical(u"AvahiError: %s", error)
1770
cleanup()
1166
1771
sys.exit(1)
1167
1772
except KeyboardInterrupt:
1168
1773
if debug:
1169
print
1774
print >> sys.stderr
1775
logger.debug(u"Server received KeyboardInterrupt")
1776
logger.debug(u"Server exiting")
1777
# Must run before the D-Bus bus name gets deregistered
1778
cleanup()
1170
1779
1171
1780
if __name__ == '__main__':
1172
1781
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0