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- Committer: Teddy Hogeborn
- Date: 2009-10-02 00:34:19 UTC
- Revision ID: teddy@fukt.bsnet.se-20091002003419-28cmxz7ls9h60l1m
* mandos (ClientDBus.ReceivedSecret): Renamed to "GotSecret". All
emitters changed.
(DBusObjectWithProperties.Introspect): Catch any XML parsing errors.
emitters changed.
(DBusObjectWithProperties.Introspect): Catch any XML parsing errors.
- files added:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- etc-plugins.d-README
- files modified:
- .bzrignore
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
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# 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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#
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# Everything else is
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# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
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# Copyright © 2008,2009 Teddy Hogeborn
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# Copyright © 2008,2009 Björn Påhlsson
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# Contact the authors at <mandos@fukt.bsnet.se>.
31
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#
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33
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from __future__ import division
34
from __future__ import division, with_statement, absolute_import
34
35
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import SocketServer
36
import SocketServer as socketserver
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import socket
37
import select
38
from optparse import OptionParser
38
import optparse
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import datetime
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import errno
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import gnutls.crypto
44
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import gnutls.library.functions
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45
import gnutls.library.constants
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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
52
import subprocess
54
53
import atexit
55
54
import stat
56
55
import logging
57
56
import logging.handlers
58
57
import pwd
58
from contextlib import closing
59
import struct
60
import fcntl
61
import functools
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62
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import dbus
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import dbus.service
61
65
import gobject
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66
import avahi
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from dbus.mainloop.glib import DBusGMainLoop
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68
import ctypes
65
66
version = "1.0"
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68
logger = logging.Logger('mandos')
69
syslogger = logging.handlers.SysLogHandler\
70
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
71
address = "/dev/log")
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syslogger.setFormatter(logging.Formatter\
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('Mandos: %(levelname)s: %(message)s'))
69
import ctypes.util
70
import xml.dom.minidom
71
import inspect
72
73
try:
74
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
75
except AttributeError:
76
try:
77
from IN import SO_BINDTODEVICE
78
except ImportError:
79
SO_BINDTODEVICE = None
80
81
82
version = "1.0.12"
83
84
logger = logging.Logger(u'mandos')
85
syslogger = (logging.handlers.SysLogHandler
86
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
87
address = "/dev/log"))
88
syslogger.setFormatter(logging.Formatter
89
(u'Mandos [%(process)d]: %(levelname)s:'
90
u' %(message)s'))
74
91
logger.addHandler(syslogger)
75
92
76
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console = logging.StreamHandler()
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
78
' %(message)s'))
94
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
95
u' %(levelname)s:'
96
u' %(message)s'))
79
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logger.addHandler(console)
80
98
81
99
class AvahiError(Exception):
82
def __init__(self, value):
100
def __init__(self, value, *args, **kwargs):
83
101
self.value = value
84
def __str__(self):
85
return repr(self.value)
102
super(AvahiError, self).__init__(value, *args, **kwargs)
103
def __unicode__(self):
104
return unicode(repr(self.value))
86
105
87
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class AvahiServiceError(AvahiError):
88
107
pass
93
112
94
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class AvahiService(object):
95
114
"""An Avahi (Zeroconf) service.
115
96
116
Attributes:
97
117
interface: integer; avahi.IF_UNSPEC or an interface index.
98
118
Used to optionally bind to the specified interface.
99
name: string; Example: 'Mandos'
100
type: string; Example: '_mandos._tcp'.
119
name: string; Example: u'Mandos'
120
type: string; Example: u'_mandos._tcp'.
101
121
See <http://www.dns-sd.org/ServiceTypes.html>
102
122
port: integer; what port to announce
103
123
TXT: list of strings; TXT record for the service
106
126
max_renames: integer; maximum number of renames
107
127
rename_count: integer; counter so we only rename after collisions
108
128
a sensible number of times
129
group: D-Bus Entry Group
130
server: D-Bus Server
131
bus: dbus.SystemBus()
109
132
"""
110
133
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
111
type = None, port = None, TXT = None, domain = "",
112
host = "", max_renames = 32768):
134
servicetype = None, port = None, TXT = None,
135
domain = u"", host = u"", max_renames = 32768,
136
protocol = avahi.PROTO_UNSPEC, bus = None):
113
137
self.interface = interface
114
138
self.name = name
115
self.type = type
139
self.type = servicetype
116
140
self.port = port
117
if TXT is None:
118
self.TXT = []
119
else:
120
self.TXT = TXT
141
self.TXT = TXT if TXT is not None else []
121
142
self.domain = domain
122
143
self.host = host
123
144
self.rename_count = 0
124
145
self.max_renames = max_renames
146
self.protocol = protocol
147
self.group = None # our entry group
148
self.server = None
149
self.bus = bus
125
150
def rename(self):
126
151
"""Derived from the Avahi example code"""
127
152
if self.rename_count >= self.max_renames:
128
153
logger.critical(u"No suitable Zeroconf service name found"
129
154
u" after %i retries, exiting.",
130
rename_count)
131
raise AvahiServiceError("Too many renames")
132
self.name = server.GetAlternativeServiceName(self.name)
155
self.rename_count)
156
raise AvahiServiceError(u"Too many renames")
157
self.name = self.server.GetAlternativeServiceName(self.name)
133
158
logger.info(u"Changing Zeroconf service name to %r ...",
134
str(self.name))
135
syslogger.setFormatter(logging.Formatter\
136
('Mandos (%s): %%(levelname)s:'
137
' %%(message)s' % self.name))
159
unicode(self.name))
160
syslogger.setFormatter(logging.Formatter
161
(u'Mandos (%s) [%%(process)d]:'
162
u' %%(levelname)s: %%(message)s'
163
% self.name))
138
164
self.remove()
139
165
self.add()
140
166
self.rename_count += 1
141
167
def remove(self):
142
168
"""Derived from the Avahi example code"""
143
if group is not None:
144
group.Reset()
169
if self.group is not None:
170
self.group.Reset()
145
171
def add(self):
146
172
"""Derived from the Avahi example code"""
147
global group
148
if group is None:
149
group = dbus.Interface\
150
(bus.get_object(avahi.DBUS_NAME,
151
server.EntryGroupNew()),
152
avahi.DBUS_INTERFACE_ENTRY_GROUP)
153
group.connect_to_signal('StateChanged',
154
entry_group_state_changed)
173
if self.group is None:
174
self.group = dbus.Interface(
175
self.bus.get_object(avahi.DBUS_NAME,
176
self.server.EntryGroupNew()),
177
avahi.DBUS_INTERFACE_ENTRY_GROUP)
178
self.group.connect_to_signal('StateChanged',
179
self
180
.entry_group_state_changed)
155
181
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
156
service.name, service.type)
157
group.AddService(
158
self.interface, # interface
159
avahi.PROTO_INET6, # protocol
160
dbus.UInt32(0), # flags
161
self.name, self.type,
162
self.domain, self.host,
163
dbus.UInt16(self.port),
164
avahi.string_array_to_txt_array(self.TXT))
165
group.Commit()
166
167
# From the Avahi example code:
168
group = None # our entry group
169
# End of Avahi example code
182
self.name, self.type)
183
self.group.AddService(
184
self.interface,
185
self.protocol,
186
dbus.UInt32(0), # flags
187
self.name, self.type,
188
self.domain, self.host,
189
dbus.UInt16(self.port),
190
avahi.string_array_to_txt_array(self.TXT))
191
self.group.Commit()
192
def entry_group_state_changed(self, state, error):
193
"""Derived from the Avahi example code"""
194
logger.debug(u"Avahi state change: %i", state)
195
196
if state == avahi.ENTRY_GROUP_ESTABLISHED:
197
logger.debug(u"Zeroconf service established.")
198
elif state == avahi.ENTRY_GROUP_COLLISION:
199
logger.warning(u"Zeroconf service name collision.")
200
self.rename()
201
elif state == avahi.ENTRY_GROUP_FAILURE:
202
logger.critical(u"Avahi: Error in group state changed %s",
203
unicode(error))
204
raise AvahiGroupError(u"State changed: %s"
205
% unicode(error))
206
def cleanup(self):
207
"""Derived from the Avahi example code"""
208
if self.group is not None:
209
self.group.Free()
210
self.group = None
211
def server_state_changed(self, state):
212
"""Derived from the Avahi example code"""
213
if state == avahi.SERVER_COLLISION:
214
logger.error(u"Zeroconf server name collision")
215
self.remove()
216
elif state == avahi.SERVER_RUNNING:
217
self.add()
218
def activate(self):
219
"""Derived from the Avahi example code"""
220
if self.server is None:
221
self.server = dbus.Interface(
222
self.bus.get_object(avahi.DBUS_NAME,
223
avahi.DBUS_PATH_SERVER),
224
avahi.DBUS_INTERFACE_SERVER)
225
self.server.connect_to_signal(u"StateChanged",
226
self.server_state_changed)
227
self.server_state_changed(self.server.GetState())
170
228
171
229
172
230
class Client(object):
173
231
"""A representation of a client host served by this server.
232
174
233
Attributes:
175
name: string; from the config file, used in log messages
234
name: string; from the config file, used in log messages and
235
D-Bus identifiers
176
236
fingerprint: string (40 or 32 hexadecimal digits); used to
177
237
uniquely identify the client
178
secret: bytestring; sent verbatim (over TLS) to client
179
host: string; available for use by the checker command
180
created: datetime.datetime(); object creation, not client host
181
last_checked_ok: datetime.datetime() or None if not yet checked OK
182
timeout: datetime.timedelta(); How long from last_checked_ok
183
until this client is invalid
184
interval: datetime.timedelta(); How often to start a new checker
185
stop_hook: If set, called by stop() as stop_hook(self)
186
checker: subprocess.Popen(); a running checker process used
187
to see if the client lives.
188
'None' if no process is running.
238
secret: bytestring; sent verbatim (over TLS) to client
239
host: string; available for use by the checker command
240
created: datetime.datetime(); (UTC) object creation
241
last_enabled: datetime.datetime(); (UTC)
242
enabled: bool()
243
last_checked_ok: datetime.datetime(); (UTC) or None
244
timeout: datetime.timedelta(); How long from last_checked_ok
245
until this client is invalid
246
interval: datetime.timedelta(); How often to start a new checker
247
disable_hook: If set, called by disable() as disable_hook(self)
248
checker: subprocess.Popen(); a running checker process used
249
to see if the client lives.
250
'None' if no process is running.
189
251
checker_initiator_tag: a gobject event source tag, or None
190
stop_initiator_tag: - '' -
252
disable_initiator_tag: - '' -
191
253
checker_callback_tag: - '' -
192
254
checker_command: string; External command which is run to check if
193
255
client lives. %() expansions are done at
194
256
runtime with vars(self) as dict, so that for
195
257
instance %(name)s can be used in the command.
196
Private attibutes:
197
_timeout: Real variable for 'timeout'
198
_interval: Real variable for 'interval'
199
_timeout_milliseconds: Used when calling gobject.timeout_add()
200
_interval_milliseconds: - '' -
258
current_checker_command: string; current running checker_command
201
259
"""
202
def _set_timeout(self, timeout):
203
"Setter function for 'timeout' attribute"
204
self._timeout = timeout
205
self._timeout_milliseconds = ((self.timeout.days
206
* 24 * 60 * 60 * 1000)
207
+ (self.timeout.seconds * 1000)
208
+ (self.timeout.microseconds
209
// 1000))
210
timeout = property(lambda self: self._timeout,
211
_set_timeout)
212
del _set_timeout
213
def _set_interval(self, interval):
214
"Setter function for 'interval' attribute"
215
self._interval = interval
216
self._interval_milliseconds = ((self.interval.days
217
* 24 * 60 * 60 * 1000)
218
+ (self.interval.seconds
219
* 1000)
220
+ (self.interval.microseconds
221
// 1000))
222
interval = property(lambda self: self._interval,
223
_set_interval)
224
del _set_interval
225
def __init__(self, name = None, stop_hook=None, config={}):
260
261
@staticmethod
262
def _timedelta_to_milliseconds(td):
263
"Convert a datetime.timedelta() to milliseconds"
264
return ((td.days * 24 * 60 * 60 * 1000)
265
+ (td.seconds * 1000)
266
+ (td.microseconds // 1000))
267
268
def timeout_milliseconds(self):
269
"Return the 'timeout' attribute in milliseconds"
270
return self._timedelta_to_milliseconds(self.timeout)
271
272
def interval_milliseconds(self):
273
"Return the 'interval' attribute in milliseconds"
274
return self._timedelta_to_milliseconds(self.interval)
275
276
def __init__(self, name = None, disable_hook=None, config=None):
226
277
"""Note: the 'checker' key in 'config' sets the
227
278
'checker_command' attribute and *not* the 'checker'
228
279
attribute."""
229
280
self.name = name
281
if config is None:
282
config = {}
230
283
logger.debug(u"Creating client %r", self.name)
231
284
# Uppercase and remove spaces from fingerprint for later
232
285
# comparison purposes with return value from the fingerprint()
233
286
# function
234
self.fingerprint = config["fingerprint"].upper()\
235
.replace(u" ", u"")
287
self.fingerprint = (config[u"fingerprint"].upper()
288
.replace(u" ", u""))
236
289
logger.debug(u" Fingerprint: %s", self.fingerprint)
237
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
239
elif "secfile" in config:
240
sf = open(config["secfile"])
241
self.secret = sf.read()
242
sf.close()
290
if u"secret" in config:
291
self.secret = config[u"secret"].decode(u"base64")
292
elif u"secfile" in config:
293
with closing(open(os.path.expanduser
294
(os.path.expandvars
295
(config[u"secfile"])),
296
"rb")) as secfile:
297
self.secret = secfile.read()
243
298
else:
244
299
raise TypeError(u"No secret or secfile for client %s"
245
300
% self.name)
246
self.host = config.get("host", "")
247
self.created = datetime.datetime.now()
301
self.host = config.get(u"host", u"")
302
self.created = datetime.datetime.utcnow()
303
self.enabled = False
304
self.last_enabled = None
248
305
self.last_checked_ok = None
249
self.timeout = string_to_delta(config["timeout"])
250
self.interval = string_to_delta(config["interval"])
251
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
252
309
self.checker = None
253
310
self.checker_initiator_tag = None
254
self.stop_initiator_tag = None
311
self.disable_initiator_tag = None
255
312
self.checker_callback_tag = None
256
self.check_command = config["checker"]
257
def start(self):
313
self.checker_command = config[u"checker"]
314
self.current_checker_command = None
315
self.last_connect = None
316
317
def enable(self):
258
318
"""Start this client's checker and timeout hooks"""
319
if getattr(self, u"enabled", False):
320
# Already enabled
321
return
322
self.last_enabled = datetime.datetime.utcnow()
259
323
# Schedule a new checker to be started an 'interval' from now,
260
324
# and every interval from then on.
261
self.checker_initiator_tag = gobject.timeout_add\
262
(self._interval_milliseconds,
263
self.start_checker)
325
self.checker_initiator_tag = (gobject.timeout_add
326
(self.interval_milliseconds(),
327
self.start_checker))
264
328
# Also start a new checker *right now*.
265
329
self.start_checker()
266
# Schedule a stop() when 'timeout' has passed
267
self.stop_initiator_tag = gobject.timeout_add\
268
(self._timeout_milliseconds,
269
self.stop)
270
def stop(self):
271
"""Stop this client.
272
The possibility that a client might be restarted is left open,
273
but not currently used."""
274
# If this client doesn't have a secret, it is already stopped.
275
if hasattr(self, "secret") and self.secret:
276
logger.info(u"Stopping client %s", self.name)
277
self.secret = None
278
else:
330
# Schedule a disable() when 'timeout' has passed
331
self.disable_initiator_tag = (gobject.timeout_add
332
(self.timeout_milliseconds(),
333
self.disable))
334
self.enabled = True
335
336
def disable(self):
337
"""Disable this client."""
338
if not getattr(self, "enabled", False):
279
339
return False
280
if getattr(self, "stop_initiator_tag", False):
281
gobject.source_remove(self.stop_initiator_tag)
282
self.stop_initiator_tag = None
283
if getattr(self, "checker_initiator_tag", False):
340
logger.info(u"Disabling client %s", self.name)
341
if getattr(self, u"disable_initiator_tag", False):
342
gobject.source_remove(self.disable_initiator_tag)
343
self.disable_initiator_tag = None
344
if getattr(self, u"checker_initiator_tag", False):
284
345
gobject.source_remove(self.checker_initiator_tag)
285
346
self.checker_initiator_tag = None
286
347
self.stop_checker()
287
if self.stop_hook:
288
self.stop_hook(self)
348
if self.disable_hook:
349
self.disable_hook(self)
350
self.enabled = False
289
351
# Do not run this again if called by a gobject.timeout_add
290
352
return False
353
291
354
def __del__(self):
292
self.stop_hook = None
293
self.stop()
294
def checker_callback(self, pid, condition):
355
self.disable_hook = None
356
self.disable()
357
358
def checker_callback(self, pid, condition, command):
295
359
"""The checker has completed, so take appropriate actions."""
296
now = datetime.datetime.now()
297
360
self.checker_callback_tag = None
298
361
self.checker = None
299
if os.WIFEXITED(condition) \
300
and (os.WEXITSTATUS(condition) == 0):
301
logger.info(u"Checker for %(name)s succeeded",
302
vars(self))
303
self.last_checked_ok = now
304
gobject.source_remove(self.stop_initiator_tag)
305
self.stop_initiator_tag = gobject.timeout_add\
306
(self._timeout_milliseconds,
307
self.stop)
308
elif not os.WIFEXITED(condition):
362
if os.WIFEXITED(condition):
363
exitstatus = os.WEXITSTATUS(condition)
364
if exitstatus == 0:
365
logger.info(u"Checker for %(name)s succeeded",
366
vars(self))
367
self.checked_ok()
368
else:
369
logger.info(u"Checker for %(name)s failed",
370
vars(self))
371
else:
309
372
logger.warning(u"Checker for %(name)s crashed?",
310
373
vars(self))
311
else:
312
logger.info(u"Checker for %(name)s failed",
313
vars(self))
374
375
def checked_ok(self):
376
"""Bump up the timeout for this client.
377
378
This should only be called when the client has been seen,
379
alive and well.
380
"""
381
self.last_checked_ok = datetime.datetime.utcnow()
382
gobject.source_remove(self.disable_initiator_tag)
383
self.disable_initiator_tag = (gobject.timeout_add
384
(self.timeout_milliseconds(),
385
self.disable))
386
314
387
def start_checker(self):
315
388
"""Start a new checker subprocess if one is not running.
389
316
390
If a checker already exists, leave it running and do
317
391
nothing."""
318
392
# The reason for not killing a running checker is that if we
323
397
# checkers alone, the checker would have to take more time
324
398
# than 'timeout' for the client to be declared invalid, which
325
399
# is as it should be.
400
401
# If a checker exists, make sure it is not a zombie
402
try:
403
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
404
except (AttributeError, OSError), error:
405
if (isinstance(error, OSError)
406
and error.errno != errno.ECHILD):
407
raise error
408
else:
409
if pid:
410
logger.warning(u"Checker was a zombie")
411
gobject.source_remove(self.checker_callback_tag)
412
self.checker_callback(pid, status,
413
self.current_checker_command)
414
# Start a new checker if needed
326
415
if self.checker is None:
327
416
try:
328
# In case check_command has exactly one % operator
329
command = self.check_command % self.host
417
# In case checker_command has exactly one % operator
418
command = self.checker_command % self.host
330
419
except TypeError:
331
420
# Escape attributes for the shell
332
escaped_attrs = dict((key, re.escape(str(val)))
421
escaped_attrs = dict((key,
422
re.escape(unicode(str(val),
423
errors=
424
u'replace')))
333
425
for key, val in
334
426
vars(self).iteritems())
335
427
try:
336
command = self.check_command % escaped_attrs
428
command = self.checker_command % escaped_attrs
337
429
except TypeError, error:
338
430
logger.error(u'Could not format string "%s":'
339
u' %s', self.check_command, error)
431
u' %s', self.checker_command, error)
340
432
return True # Try again later
433
self.current_checker_command = command
341
434
try:
342
435
logger.info(u"Starting checker %r for %s",
343
436
command, self.name)
347
440
# always replaced by /dev/null.)
348
441
self.checker = subprocess.Popen(command,
349
442
close_fds=True,
350
shell=True, cwd="/")
351
self.checker_callback_tag = gobject.child_watch_add\
352
(self.checker.pid,
353
self.checker_callback)
443
shell=True, cwd=u"/")
444
self.checker_callback_tag = (gobject.child_watch_add
445
(self.checker.pid,
446
self.checker_callback,
447
data=command))
448
# The checker may have completed before the gobject
449
# watch was added. Check for this.
450
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
451
if pid:
452
gobject.source_remove(self.checker_callback_tag)
453
self.checker_callback(pid, status, command)
354
454
except OSError, error:
355
455
logger.error(u"Failed to start subprocess: %s",
356
456
error)
357
457
# Re-run this periodically if run by gobject.timeout_add
358
458
return True
459
359
460
def stop_checker(self):
360
461
"""Force the checker process, if any, to stop."""
361
462
if self.checker_callback_tag:
362
463
gobject.source_remove(self.checker_callback_tag)
363
464
self.checker_callback_tag = None
364
if getattr(self, "checker", None) is None:
465
if getattr(self, u"checker", None) is None:
365
466
return
366
467
logger.debug(u"Stopping checker for %(name)s", vars(self))
367
468
try:
373
474
if error.errno != errno.ESRCH: # No such process
374
475
raise
375
476
self.checker = None
477
376
478
def still_valid(self):
377
479
"""Has the timeout not yet passed for this client?"""
378
now = datetime.datetime.now()
480
if not getattr(self, u"enabled", False):
481
return False
482
now = datetime.datetime.utcnow()
379
483
if self.last_checked_ok is None:
380
484
return now < (self.created + self.timeout)
381
485
else:
382
486
return now < (self.last_checked_ok + self.timeout)
383
487
384
488
385
def peer_certificate(session):
386
"Return the peer's OpenPGP certificate as a bytestring"
387
# If not an OpenPGP certificate...
388
if gnutls.library.functions.gnutls_certificate_type_get\
389
(session._c_object) \
390
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
391
# ...do the normal thing
392
return session.peer_certificate
393
list_size = ctypes.c_uint()
394
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
395
(session._c_object, ctypes.byref(list_size))
396
if list_size.value == 0:
397
return None
398
cert = cert_list[0]
399
return ctypes.string_at(cert.data, cert.size)
400
401
402
def fingerprint(openpgp):
403
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
404
# New GnuTLS "datum" with the OpenPGP public key
405
datum = gnutls.library.types.gnutls_datum_t\
406
(ctypes.cast(ctypes.c_char_p(openpgp),
407
ctypes.POINTER(ctypes.c_ubyte)),
408
ctypes.c_uint(len(openpgp)))
409
# New empty GnuTLS certificate
410
crt = gnutls.library.types.gnutls_openpgp_crt_t()
411
gnutls.library.functions.gnutls_openpgp_crt_init\
412
(ctypes.byref(crt))
413
# Import the OpenPGP public key into the certificate
414
gnutls.library.functions.gnutls_openpgp_crt_import\
415
(crt, ctypes.byref(datum),
416
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
417
# Verify the self signature in the key
418
crtverify = ctypes.c_uint();
419
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
420
(crt, 0, ctypes.byref(crtverify))
421
if crtverify.value != 0:
422
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
423
raise gnutls.errors.CertificateSecurityError("Verify failed")
424
# New buffer for the fingerprint
425
buffer = ctypes.create_string_buffer(20)
426
buffer_length = ctypes.c_size_t()
427
# Get the fingerprint from the certificate into the buffer
428
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
429
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
430
# Deinit the certificate
431
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
432
# Convert the buffer to a Python bytestring
433
fpr = ctypes.string_at(buffer, buffer_length.value)
434
# Convert the bytestring to hexadecimal notation
435
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
436
return hex_fpr
437
438
439
class tcp_handler(SocketServer.BaseRequestHandler, object):
440
"""A TCP request handler class.
441
Instantiated by IPv6_TCPServer for each request to handle it.
489
def dbus_service_property(dbus_interface, signature=u"v",
490
access=u"readwrite", byte_arrays=False):
491
"""Decorators for marking methods of a DBusObjectWithProperties to
492
become properties on the D-Bus.
493
494
The decorated method will be called with no arguments by "Get"
495
and with one argument by "Set".
496
497
The parameters, where they are supported, are the same as
498
dbus.service.method, except there is only "signature", since the
499
type from Get() and the type sent to Set() is the same.
500
"""
501
def decorator(func):
502
func._dbus_is_property = True
503
func._dbus_interface = dbus_interface
504
func._dbus_signature = signature
505
func._dbus_access = access
506
func._dbus_name = func.__name__
507
if func._dbus_name.endswith(u"_dbus_property"):
508
func._dbus_name = func._dbus_name[:-14]
509
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
510
return func
511
return decorator
512
513
514
class DBusPropertyException(dbus.exceptions.DBusException):
515
"""A base class for D-Bus property-related exceptions
516
"""
517
def __unicode__(self):
518
return unicode(str(self))
519
520
521
class DBusPropertyAccessException(DBusPropertyException):
522
"""A property's access permissions disallows an operation.
523
"""
524
pass
525
526
527
class DBusPropertyNotFound(DBusPropertyException):
528
"""An attempt was made to access a non-existing property.
529
"""
530
pass
531
532
533
class DBusObjectWithProperties(dbus.service.Object):
534
"""A D-Bus object with properties.
535
536
Classes inheriting from this can use the dbus_service_property
537
decorator to expose methods as D-Bus properties. It exposes the
538
standard Get(), Set(), and GetAll() methods on the D-Bus.
539
"""
540
541
@staticmethod
542
def _is_dbus_property(obj):
543
return getattr(obj, u"_dbus_is_property", False)
544
545
def _get_all_dbus_properties(self):
546
"""Returns a generator of (name, attribute) pairs
547
"""
548
return ((prop._dbus_name, prop)
549
for name, prop in
550
inspect.getmembers(self, self._is_dbus_property))
551
552
def _get_dbus_property(self, interface_name, property_name):
553
"""Returns a bound method if one exists which is a D-Bus
554
property with the specified name and interface.
555
"""
556
for name in (property_name,
557
property_name + u"_dbus_property"):
558
prop = getattr(self, name, None)
559
if (prop is None
560
or not self._is_dbus_property(prop)
561
or prop._dbus_name != property_name
562
or (interface_name and prop._dbus_interface
563
and interface_name != prop._dbus_interface)):
564
continue
565
return prop
566
# No such property
567
raise DBusPropertyNotFound(self.dbus_object_path + u":"
568
+ interface_name + u"."
569
+ property_name)
570
571
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
572
out_signature=u"v")
573
def Get(self, interface_name, property_name):
574
"""Standard D-Bus property Get() method, see D-Bus standard.
575
"""
576
prop = self._get_dbus_property(interface_name, property_name)
577
if prop._dbus_access == u"write":
578
raise DBusPropertyAccessException(property_name)
579
value = prop()
580
if not hasattr(value, u"variant_level"):
581
return value
582
return type(value)(value, variant_level=value.variant_level+1)
583
584
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
585
def Set(self, interface_name, property_name, value):
586
"""Standard D-Bus property Set() method, see D-Bus standard.
587
"""
588
prop = self._get_dbus_property(interface_name, property_name)
589
if prop._dbus_access == u"read":
590
raise DBusPropertyAccessException(property_name)
591
if prop._dbus_get_args_options[u"byte_arrays"]:
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, signal = True):
709
oldstate = getattr(self, u"enabled", False)
710
r = Client.disable(self)
711
if signal 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
731
self.PropertyChanged(dbus.String(u"checker_running"),
732
dbus.Boolean(False, variant_level=1))
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
782
783
## D-Bus methods & signals
784
_interface = u"se.bsnet.fukt.Mandos.Client"
785
786
# CheckedOK - method
787
@dbus.service.method(_interface)
788
def CheckedOK(self):
789
return self.checked_ok()
790
791
# CheckerCompleted - signal
792
@dbus.service.signal(_interface, signature=u"nxs")
793
def CheckerCompleted(self, exitcode, waitstatus, command):
794
"D-Bus signal"
795
pass
796
797
# CheckerStarted - signal
798
@dbus.service.signal(_interface, signature=u"s")
799
def CheckerStarted(self, command):
800
"D-Bus signal"
801
pass
802
803
# PropertyChanged - signal
804
@dbus.service.signal(_interface, signature=u"sv")
805
def PropertyChanged(self, property, value):
806
"D-Bus signal"
807
pass
808
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()
826
827
# StartChecker - method
828
@dbus.service.method(_interface)
829
def StartChecker(self):
830
"D-Bus method"
831
self.start_checker()
832
833
# Disable - method
834
@dbus.service.method(_interface)
835
def Disable(self):
836
"D-Bus method"
837
self.disable()
838
839
# StopChecker - method
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)
979
980
del _interface
981
982
983
class ClientHandler(socketserver.BaseRequestHandler, object):
984
"""A class to handle client connections.
985
986
Instantiated once for each connection to handle it.
442
987
Note: This will run in its own forked process."""
443
988
444
989
def handle(self):
445
990
logger.info(u"TCP connection from: %s",
446
unicode(self.client_address))
447
session = gnutls.connection.ClientSession\
448
(self.request, gnutls.connection.X509Credentials())
449
450
line = self.request.makefile().readline()
451
logger.debug(u"Protocol version: %r", line)
452
try:
453
if int(line.strip().split()[0]) > 1:
454
raise RuntimeError
455
except (ValueError, IndexError, RuntimeError), error:
456
logger.error(u"Unknown protocol version: %s", error)
457
return
458
459
# Note: gnutls.connection.X509Credentials is really a generic
460
# GnuTLS certificate credentials object so long as no X.509
461
# keys are added to it. Therefore, we can use it here despite
462
# using OpenPGP certificates.
463
464
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
465
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
466
# "+DHE-DSS"))
467
priority = "NORMAL" # Fallback default, since this
468
# MUST be set.
469
if self.server.settings["priority"]:
470
priority = self.server.settings["priority"]
471
gnutls.library.functions.gnutls_priority_set_direct\
472
(session._c_object, priority, None);
473
474
try:
475
session.handshake()
476
except gnutls.errors.GNUTLSError, error:
477
logger.warning(u"Handshake failed: %s", error)
478
# Do not run session.bye() here: the session is not
479
# established. Just abandon the request.
480
return
481
try:
482
fpr = fingerprint(peer_certificate(session))
483
except (TypeError, gnutls.errors.GNUTLSError), error:
484
logger.warning(u"Bad certificate: %s", error)
485
session.bye()
486
return
487
logger.debug(u"Fingerprint: %s", fpr)
488
client = None
489
for c in self.server.clients:
490
if c.fingerprint == fpr:
491
client = c
492
break
493
if not client:
494
logger.warning(u"Client not found for fingerprint: %s",
495
fpr)
496
session.bye()
497
return
498
# Have to check if client.still_valid(), since it is possible
499
# that the client timed out while establishing the GnuTLS
500
# session.
501
if not client.still_valid():
502
logger.warning(u"Client %(name)s is invalid",
503
vars(client))
504
session.bye()
505
return
506
sent_size = 0
507
while sent_size < len(client.secret):
508
sent = session.send(client.secret[sent_size:])
509
logger.debug(u"Sent: %d, remaining: %d",
510
sent, len(client.secret)
511
- (sent_size + sent))
512
sent_size += sent
513
session.bye()
514
515
516
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
517
"""IPv6 TCP server. Accepts 'None' as address and/or port.
991
unicode(self.client_address))
992
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
993
# Open IPC pipe to parent process
994
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
995
session = (gnutls.connection
996
.ClientSession(self.request,
997
gnutls.connection
998
.X509Credentials()))
999
1000
line = self.request.makefile().readline()
1001
logger.debug(u"Protocol version: %r", line)
1002
try:
1003
if int(line.strip().split()[0]) > 1:
1004
raise RuntimeError
1005
except (ValueError, IndexError, RuntimeError), error:
1006
logger.error(u"Unknown protocol version: %s", error)
1007
return
1008
1009
# Note: gnutls.connection.X509Credentials is really a
1010
# generic GnuTLS certificate credentials object so long as
1011
# no X.509 keys are added to it. Therefore, we can use it
1012
# here despite using OpenPGP certificates.
1013
1014
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1015
# u"+AES-256-CBC", u"+SHA1",
1016
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1017
# u"+DHE-DSS"))
1018
# Use a fallback default, since this MUST be set.
1019
priority = self.server.gnutls_priority
1020
if priority is None:
1021
priority = u"NORMAL"
1022
(gnutls.library.functions
1023
.gnutls_priority_set_direct(session._c_object,
1024
priority, None))
1025
1026
try:
1027
session.handshake()
1028
except gnutls.errors.GNUTLSError, error:
1029
logger.warning(u"Handshake failed: %s", error)
1030
# Do not run session.bye() here: the session is not
1031
# established. Just abandon the request.
1032
return
1033
logger.debug(u"Handshake succeeded")
1034
try:
1035
fpr = self.fingerprint(self.peer_certificate(session))
1036
except (TypeError, gnutls.errors.GNUTLSError), error:
1037
logger.warning(u"Bad certificate: %s", error)
1038
session.bye()
1039
return
1040
logger.debug(u"Fingerprint: %s", fpr)
1041
1042
for c in self.server.clients:
1043
if c.fingerprint == fpr:
1044
client = c
1045
break
1046
else:
1047
ipc.write(u"NOTFOUND %s %s\n"
1048
% (fpr, unicode(self.client_address)))
1049
session.bye()
1050
return
1051
# Have to check if client.still_valid(), since it is
1052
# possible that the client timed out while establishing
1053
# the GnuTLS session.
1054
if not client.still_valid():
1055
ipc.write(u"INVALID %s\n" % client.name)
1056
session.bye()
1057
return
1058
ipc.write(u"SENDING %s\n" % client.name)
1059
sent_size = 0
1060
while sent_size < len(client.secret):
1061
sent = session.send(client.secret[sent_size:])
1062
logger.debug(u"Sent: %d, remaining: %d",
1063
sent, len(client.secret)
1064
- (sent_size + sent))
1065
sent_size += sent
1066
session.bye()
1067
1068
@staticmethod
1069
def peer_certificate(session):
1070
"Return the peer's OpenPGP certificate as a bytestring"
1071
# If not an OpenPGP certificate...
1072
if (gnutls.library.functions
1073
.gnutls_certificate_type_get(session._c_object)
1074
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1075
# ...do the normal thing
1076
return session.peer_certificate
1077
list_size = ctypes.c_uint(1)
1078
cert_list = (gnutls.library.functions
1079
.gnutls_certificate_get_peers
1080
(session._c_object, ctypes.byref(list_size)))
1081
if not bool(cert_list) and list_size.value != 0:
1082
raise gnutls.errors.GNUTLSError(u"error getting peer"
1083
u" certificate")
1084
if list_size.value == 0:
1085
return None
1086
cert = cert_list[0]
1087
return ctypes.string_at(cert.data, cert.size)
1088
1089
@staticmethod
1090
def fingerprint(openpgp):
1091
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1092
# New GnuTLS "datum" with the OpenPGP public key
1093
datum = (gnutls.library.types
1094
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1095
ctypes.POINTER
1096
(ctypes.c_ubyte)),
1097
ctypes.c_uint(len(openpgp))))
1098
# New empty GnuTLS certificate
1099
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1100
(gnutls.library.functions
1101
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1102
# Import the OpenPGP public key into the certificate
1103
(gnutls.library.functions
1104
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1105
gnutls.library.constants
1106
.GNUTLS_OPENPGP_FMT_RAW))
1107
# Verify the self signature in the key
1108
crtverify = ctypes.c_uint()
1109
(gnutls.library.functions
1110
.gnutls_openpgp_crt_verify_self(crt, 0,
1111
ctypes.byref(crtverify)))
1112
if crtverify.value != 0:
1113
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1114
raise (gnutls.errors.CertificateSecurityError
1115
(u"Verify failed"))
1116
# New buffer for the fingerprint
1117
buf = ctypes.create_string_buffer(20)
1118
buf_len = ctypes.c_size_t()
1119
# Get the fingerprint from the certificate into the buffer
1120
(gnutls.library.functions
1121
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1122
ctypes.byref(buf_len)))
1123
# Deinit the certificate
1124
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1125
# Convert the buffer to a Python bytestring
1126
fpr = ctypes.string_at(buf, buf_len.value)
1127
# Convert the bytestring to hexadecimal notation
1128
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1129
return hex_fpr
1130
1131
1132
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1133
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1134
def process_request(self, request, client_address):
1135
"""Overrides and wraps the original process_request().
1136
1137
This function creates a new pipe in self.pipe
1138
"""
1139
self.pipe = os.pipe()
1140
super(ForkingMixInWithPipe,
1141
self).process_request(request, client_address)
1142
os.close(self.pipe[1]) # close write end
1143
self.add_pipe(self.pipe[0])
1144
def add_pipe(self, pipe):
1145
"""Dummy function; override as necessary"""
1146
os.close(pipe)
1147
1148
1149
class IPv6_TCPServer(ForkingMixInWithPipe,
1150
socketserver.TCPServer, object):
1151
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1152
518
1153
Attributes:
519
settings: Server settings
520
clients: Set() of Client objects
521
1154
enabled: Boolean; whether this server is activated yet
1155
interface: None or a network interface name (string)
1156
use_ipv6: Boolean; to use IPv6 or not
522
1157
"""
523
address_family = socket.AF_INET6
524
def __init__(self, *args, **kwargs):
525
if "settings" in kwargs:
526
self.settings = kwargs["settings"]
527
del kwargs["settings"]
528
if "clients" in kwargs:
529
self.clients = kwargs["clients"]
530
del kwargs["clients"]
531
self.enabled = False
532
return super(type(self), self).__init__(*args, **kwargs)
1158
def __init__(self, server_address, RequestHandlerClass,
1159
interface=None, use_ipv6=True):
1160
self.interface = interface
1161
if use_ipv6:
1162
self.address_family = socket.AF_INET6
1163
socketserver.TCPServer.__init__(self, server_address,
1164
RequestHandlerClass)
533
1165
def server_bind(self):
534
1166
"""This overrides the normal server_bind() function
535
1167
to bind to an interface if one was specified, and also NOT to
536
1168
bind to an address or port if they were not specified."""
537
if self.settings["interface"]:
538
# 25 is from /usr/include/asm-i486/socket.h
539
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
540
try:
541
self.socket.setsockopt(socket.SOL_SOCKET,
542
SO_BINDTODEVICE,
543
self.settings["interface"])
544
except socket.error, error:
545
if error[0] == errno.EPERM:
546
logger.error(u"No permission to"
547
u" bind to interface %s",
548
self.settings["interface"])
549
else:
550
raise error
1169
if self.interface is not None:
1170
if SO_BINDTODEVICE is None:
1171
logger.error(u"SO_BINDTODEVICE does not exist;"
1172
u" cannot bind to interface %s",
1173
self.interface)
1174
else:
1175
try:
1176
self.socket.setsockopt(socket.SOL_SOCKET,
1177
SO_BINDTODEVICE,
1178
str(self.interface
1179
+ u'\0'))
1180
except socket.error, error:
1181
if error[0] == errno.EPERM:
1182
logger.error(u"No permission to"
1183
u" bind to interface %s",
1184
self.interface)
1185
elif error[0] == errno.ENOPROTOOPT:
1186
logger.error(u"SO_BINDTODEVICE not available;"
1187
u" cannot bind to interface %s",
1188
self.interface)
1189
else:
1190
raise
551
1191
# Only bind(2) the socket if we really need to.
552
1192
if self.server_address[0] or self.server_address[1]:
553
1193
if not self.server_address[0]:
554
in6addr_any = "::"
555
self.server_address = (in6addr_any,
1194
if self.address_family == socket.AF_INET6:
1195
any_address = u"::" # in6addr_any
1196
else:
1197
any_address = socket.INADDR_ANY
1198
self.server_address = (any_address,
556
1199
self.server_address[1])
557
1200
elif not self.server_address[1]:
558
1201
self.server_address = (self.server_address[0],
559
1202
0)
560
# if self.settings["interface"]:
1203
# if self.interface:
561
1204
# self.server_address = (self.server_address[0],
562
1205
# 0, # port
563
1206
# 0, # flowinfo
564
1207
# if_nametoindex
565
# (self.settings
566
# ["interface"]))
567
return super(type(self), self).server_bind()
1208
# (self.interface))
1209
return socketserver.TCPServer.server_bind(self)
1210
1211
1212
class MandosServer(IPv6_TCPServer):
1213
"""Mandos server.
1214
1215
Attributes:
1216
clients: set of Client objects
1217
gnutls_priority GnuTLS priority string
1218
use_dbus: Boolean; to emit D-Bus signals or not
1219
1220
Assumes a gobject.MainLoop event loop.
1221
"""
1222
def __init__(self, server_address, RequestHandlerClass,
1223
interface=None, use_ipv6=True, clients=None,
1224
gnutls_priority=None, use_dbus=True):
1225
self.enabled = False
1226
self.clients = clients
1227
if self.clients is None:
1228
self.clients = set()
1229
self.use_dbus = use_dbus
1230
self.gnutls_priority = gnutls_priority
1231
IPv6_TCPServer.__init__(self, server_address,
1232
RequestHandlerClass,
1233
interface = interface,
1234
use_ipv6 = use_ipv6)
568
1235
def server_activate(self):
569
1236
if self.enabled:
570
return super(type(self), self).server_activate()
1237
return socketserver.TCPServer.server_activate(self)
571
1238
def enable(self):
572
1239
self.enabled = True
1240
def add_pipe(self, pipe):
1241
# Call "handle_ipc" for both data and EOF events
1242
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1243
self.handle_ipc)
1244
def handle_ipc(self, source, condition, file_objects={}):
1245
condition_names = {
1246
gobject.IO_IN: u"IN", # There is data to read.
1247
gobject.IO_OUT: u"OUT", # Data can be written (without
1248
# blocking).
1249
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1250
gobject.IO_ERR: u"ERR", # Error condition.
1251
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1252
# broken, usually for pipes and
1253
# sockets).
1254
}
1255
conditions_string = ' | '.join(name
1256
for cond, name in
1257
condition_names.iteritems()
1258
if cond & condition)
1259
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1260
conditions_string)
1261
1262
# Turn the pipe file descriptor into a Python file object
1263
if source not in file_objects:
1264
file_objects[source] = os.fdopen(source, u"r", 1)
1265
1266
# Read a line from the file object
1267
cmdline = file_objects[source].readline()
1268
if not cmdline: # Empty line means end of file
1269
# close the IPC pipe
1270
file_objects[source].close()
1271
del file_objects[source]
1272
1273
# Stop calling this function
1274
return False
1275
1276
logger.debug(u"IPC command: %r", cmdline)
1277
1278
# Parse and act on command
1279
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1280
1281
if cmd == u"NOTFOUND":
1282
logger.warning(u"Client not found for fingerprint: %s",
1283
args)
1284
if self.use_dbus:
1285
# Emit D-Bus signal
1286
mandos_dbus_service.ClientNotFound(args)
1287
elif cmd == u"INVALID":
1288
for client in self.clients:
1289
if client.name == args:
1290
logger.warning(u"Client %s is invalid", args)
1291
if self.use_dbus:
1292
# Emit D-Bus signal
1293
client.Rejected()
1294
break
1295
else:
1296
logger.error(u"Unknown client %s is invalid", args)
1297
elif cmd == u"SENDING":
1298
for client in self.clients:
1299
if client.name == args:
1300
logger.info(u"Sending secret to %s", client.name)
1301
client.checked_ok()
1302
if self.use_dbus:
1303
# Emit D-Bus signal
1304
client.GotSecret()
1305
break
1306
else:
1307
logger.error(u"Sending secret to unknown client %s",
1308
args)
1309
else:
1310
logger.error(u"Unknown IPC command: %r", cmdline)
1311
1312
# Keep calling this function
1313
return True
573
1314
574
1315
575
1316
def string_to_delta(interval):
576
1317
"""Parse a string and return a datetime.timedelta
577
578
>>> string_to_delta('7d')
1318
1319
>>> string_to_delta(u'7d')
579
1320
datetime.timedelta(7)
580
>>> string_to_delta('60s')
1321
>>> string_to_delta(u'60s')
581
1322
datetime.timedelta(0, 60)
582
>>> string_to_delta('60m')
1323
>>> string_to_delta(u'60m')
583
1324
datetime.timedelta(0, 3600)
584
>>> string_to_delta('24h')
1325
>>> string_to_delta(u'24h')
585
1326
datetime.timedelta(1)
586
1327
>>> string_to_delta(u'1w')
587
1328
datetime.timedelta(7)
588
>>> string_to_delta('5m 30s')
1329
>>> string_to_delta(u'5m 30s')
589
1330
datetime.timedelta(0, 330)
590
1331
"""
591
1332
timevalue = datetime.timedelta(0)
592
1333
for s in interval.split():
593
1334
try:
594
suffix=unicode(s[-1])
595
value=int(s[:-1])
1335
suffix = unicode(s[-1])
1336
value = int(s[:-1])
596
1337
if suffix == u"d":
597
1338
delta = datetime.timedelta(value)
598
1339
elif suffix == u"s":
611
1352
return timevalue
612
1353
613
1354
614
def server_state_changed(state):
615
"""Derived from the Avahi example code"""
616
if state == avahi.SERVER_COLLISION:
617
logger.error(u"Zeroconf server name collision")
618
service.remove()
619
elif state == avahi.SERVER_RUNNING:
620
service.add()
621
622
623
def entry_group_state_changed(state, error):
624
"""Derived from the Avahi example code"""
625
logger.debug(u"Avahi state change: %i", state)
626
627
if state == avahi.ENTRY_GROUP_ESTABLISHED:
628
logger.debug(u"Zeroconf service established.")
629
elif state == avahi.ENTRY_GROUP_COLLISION:
630
logger.warning(u"Zeroconf service name collision.")
631
service.rename()
632
elif state == avahi.ENTRY_GROUP_FAILURE:
633
logger.critical(u"Avahi: Error in group state changed %s",
634
unicode(error))
635
raise AvahiGroupError("State changed: %s", str(error))
636
637
1355
def if_nametoindex(interface):
638
"""Call the C function if_nametoindex(), or equivalent"""
1356
"""Call the C function if_nametoindex(), or equivalent
1357
1358
Note: This function cannot accept a unicode string."""
639
1359
global if_nametoindex
640
1360
try:
641
if "ctypes.util" not in sys.modules:
642
import ctypes.util
643
if_nametoindex = ctypes.cdll.LoadLibrary\
644
(ctypes.util.find_library("c")).if_nametoindex
1361
if_nametoindex = (ctypes.cdll.LoadLibrary
1362
(ctypes.util.find_library(u"c"))
1363
.if_nametoindex)
645
1364
except (OSError, AttributeError):
646
if "struct" not in sys.modules:
647
import struct
648
if "fcntl" not in sys.modules:
649
import fcntl
1365
logger.warning(u"Doing if_nametoindex the hard way")
650
1366
def if_nametoindex(interface):
651
1367
"Get an interface index the hard way, i.e. using fcntl()"
652
1368
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
653
s = socket.socket()
654
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
655
struct.pack("16s16x", interface))
656
s.close()
657
interface_index = struct.unpack("I", ifreq[16:20])[0]
1369
with closing(socket.socket()) as s:
1370
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1371
struct.pack(str(u"16s16x"),
1372
interface))
1373
interface_index = struct.unpack(str(u"I"),
1374
ifreq[16:20])[0]
658
1375
return interface_index
659
1376
return if_nametoindex(interface)
660
1377
661
1378
662
1379
def daemon(nochdir = False, noclose = False):
663
1380
"""See daemon(3). Standard BSD Unix function.
1381
664
1382
This should really exist as os.daemon, but it doesn't (yet)."""
665
1383
if os.fork():
666
1384
sys.exit()
667
1385
os.setsid()
668
1386
if not nochdir:
669
os.chdir("/")
1387
os.chdir(u"/")
670
1388
if os.fork():
671
1389
sys.exit()
672
1390
if not noclose:
674
1392
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
675
1393
if not stat.S_ISCHR(os.fstat(null).st_mode):
676
1394
raise OSError(errno.ENODEV,
677
"/dev/null not a character device")
1395
u"/dev/null not a character device")
678
1396
os.dup2(null, sys.stdin.fileno())
679
1397
os.dup2(null, sys.stdout.fileno())
680
1398
os.dup2(null, sys.stderr.fileno())
683
1401
684
1402
685
1403
def main():
686
global main_loop_started
687
main_loop_started = False
688
689
parser = OptionParser(version = "%%prog %s" % version)
690
parser.add_option("-i", "--interface", type="string",
691
metavar="IF", help="Bind to interface IF")
692
parser.add_option("-a", "--address", type="string",
693
help="Address to listen for requests on")
694
parser.add_option("-p", "--port", type="int",
695
help="Port number to receive requests on")
696
parser.add_option("--check", action="store_true", default=False,
697
help="Run self-test")
698
parser.add_option("--debug", action="store_true",
699
help="Debug mode; run in foreground and log to"
700
" terminal")
701
parser.add_option("--priority", type="string", help="GnuTLS"
702
" priority string (see GnuTLS documentation)")
703
parser.add_option("--servicename", type="string", metavar="NAME",
704
help="Zeroconf service name")
705
parser.add_option("--configdir", type="string",
706
default="/etc/mandos", metavar="DIR",
707
help="Directory to search for configuration"
708
" files")
709
(options, args) = parser.parse_args()
1404
1405
##################################################################
1406
# Parsing of options, both command line and config file
1407
1408
parser = optparse.OptionParser(version = "%%prog %s" % version)
1409
parser.add_option("-i", u"--interface", type=u"string",
1410
metavar="IF", help=u"Bind to interface IF")
1411
parser.add_option("-a", u"--address", type=u"string",
1412
help=u"Address to listen for requests on")
1413
parser.add_option("-p", u"--port", type=u"int",
1414
help=u"Port number to receive requests on")
1415
parser.add_option("--check", action=u"store_true",
1416
help=u"Run self-test")
1417
parser.add_option("--debug", action=u"store_true",
1418
help=u"Debug mode; run in foreground and log to"
1419
u" terminal")
1420
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1421
u" priority string (see GnuTLS documentation)")
1422
parser.add_option("--servicename", type=u"string",
1423
metavar=u"NAME", help=u"Zeroconf service name")
1424
parser.add_option("--configdir", type=u"string",
1425
default=u"/etc/mandos", metavar=u"DIR",
1426
help=u"Directory to search for configuration"
1427
u" files")
1428
parser.add_option("--no-dbus", action=u"store_false",
1429
dest=u"use_dbus", help=u"Do not provide D-Bus"
1430
u" system bus interface")
1431
parser.add_option("--no-ipv6", action=u"store_false",
1432
dest=u"use_ipv6", help=u"Do not use IPv6")
1433
options = parser.parse_args()[0]
710
1434
711
1435
if options.check:
712
1436
import doctest
714
1438
sys.exit()
715
1439
716
1440
# Default values for config file for server-global settings
717
server_defaults = { "interface": "",
718
"address": "",
719
"port": "",
720
"debug": "False",
721
"priority":
722
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
723
"servicename": "Mandos",
1441
server_defaults = { u"interface": u"",
1442
u"address": u"",
1443
u"port": u"",
1444
u"debug": u"False",
1445
u"priority":
1446
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1447
u"servicename": u"Mandos",
1448
u"use_dbus": u"True",
1449
u"use_ipv6": u"True",
724
1450
}
725
1451
726
1452
# Parse config file for server-global settings
727
server_config = ConfigParser.SafeConfigParser(server_defaults)
1453
server_config = configparser.SafeConfigParser(server_defaults)
728
1454
del server_defaults
729
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1455
server_config.read(os.path.join(options.configdir,
1456
u"mandos.conf"))
730
1457
# Convert the SafeConfigParser object to a dict
731
1458
server_settings = server_config.defaults()
732
# Use getboolean on the boolean config option
733
server_settings["debug"] = server_config.getboolean\
734
("DEFAULT", "debug")
1459
# Use the appropriate methods on the non-string config options
1460
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1461
server_settings[option] = server_config.getboolean(u"DEFAULT",
1462
option)
1463
if server_settings["port"]:
1464
server_settings["port"] = server_config.getint(u"DEFAULT",
1465
u"port")
735
1466
del server_config
736
1467
737
1468
# Override the settings from the config file with command line
738
1469
# options, if set.
739
for option in ("interface", "address", "port", "debug",
740
"priority", "servicename", "configdir"):
1470
for option in (u"interface", u"address", u"port", u"debug",
1471
u"priority", u"servicename", u"configdir",
1472
u"use_dbus", u"use_ipv6"):
741
1473
value = getattr(options, option)
742
1474
if value is not None:
743
1475
server_settings[option] = value
744
1476
del options
1477
# Force all strings to be unicode
1478
for option in server_settings.keys():
1479
if type(server_settings[option]) is str:
1480
server_settings[option] = unicode(server_settings[option])
745
1481
# Now we have our good server settings in "server_settings"
746
1482
747
debug = server_settings["debug"]
1483
##################################################################
1484
1485
# For convenience
1486
debug = server_settings[u"debug"]
1487
use_dbus = server_settings[u"use_dbus"]
1488
use_ipv6 = server_settings[u"use_ipv6"]
748
1489
749
1490
if not debug:
750
1491
syslogger.setLevel(logging.WARNING)
751
1492
console.setLevel(logging.WARNING)
752
1493
753
if server_settings["servicename"] != "Mandos":
754
syslogger.setFormatter(logging.Formatter\
755
('Mandos (%s): %%(levelname)s:'
756
' %%(message)s'
757
% server_settings["servicename"]))
1494
if server_settings[u"servicename"] != u"Mandos":
1495
syslogger.setFormatter(logging.Formatter
1496
(u'Mandos (%s) [%%(process)d]:'
1497
u' %%(levelname)s: %%(message)s'
1498
% server_settings[u"servicename"]))
758
1499
759
1500
# Parse config file with clients
760
client_defaults = { "timeout": "1h",
761
"interval": "5m",
762
"checker": "fping -q -- %(host)s",
763
"host": "",
1501
client_defaults = { u"timeout": u"1h",
1502
u"interval": u"5m",
1503
u"checker": u"fping -q -- %%(host)s",
1504
u"host": u"",
764
1505
}
765
client_config = ConfigParser.SafeConfigParser(client_defaults)
766
client_config.read(os.path.join(server_settings["configdir"],
767
"clients.conf"))
768
769
clients = Set()
770
tcp_server = IPv6_TCPServer((server_settings["address"],
771
server_settings["port"]),
772
tcp_handler,
773
settings=server_settings,
774
clients=clients)
775
pidfilename = "/var/run/mandos.pid"
776
try:
777
pidfile = open(pidfilename, "w")
778
except IOError, error:
779
logger.error("Could not open file %r", pidfilename)
780
781
uid = 65534
782
gid = 65534
783
try:
784
uid = pwd.getpwnam("mandos").pw_uid
785
except KeyError:
786
try:
787
uid = pwd.getpwnam("nobody").pw_uid
788
except KeyError:
789
pass
790
try:
791
gid = pwd.getpwnam("mandos").pw_gid
792
except KeyError:
793
try:
794
gid = pwd.getpwnam("nogroup").pw_gid
795
except KeyError:
796
pass
797
try:
1506
client_config = configparser.SafeConfigParser(client_defaults)
1507
client_config.read(os.path.join(server_settings[u"configdir"],
1508
u"clients.conf"))
1509
1510
global mandos_dbus_service
1511
mandos_dbus_service = None
1512
1513
tcp_server = MandosServer((server_settings[u"address"],
1514
server_settings[u"port"]),
1515
ClientHandler,
1516
interface=server_settings[u"interface"],
1517
use_ipv6=use_ipv6,
1518
gnutls_priority=
1519
server_settings[u"priority"],
1520
use_dbus=use_dbus)
1521
pidfilename = u"/var/run/mandos.pid"
1522
try:
1523
pidfile = open(pidfilename, u"w")
1524
except IOError:
1525
logger.error(u"Could not open file %r", pidfilename)
1526
1527
try:
1528
uid = pwd.getpwnam(u"_mandos").pw_uid
1529
gid = pwd.getpwnam(u"_mandos").pw_gid
1530
except KeyError:
1531
try:
1532
uid = pwd.getpwnam(u"mandos").pw_uid
1533
gid = pwd.getpwnam(u"mandos").pw_gid
1534
except KeyError:
1535
try:
1536
uid = pwd.getpwnam(u"nobody").pw_uid
1537
gid = pwd.getpwnam(u"nobody").pw_gid
1538
except KeyError:
1539
uid = 65534
1540
gid = 65534
1541
try:
1542
os.setgid(gid)
798
1543
os.setuid(uid)
799
os.setgid(gid)
800
1544
except OSError, error:
801
1545
if error[0] != errno.EPERM:
802
1546
raise error
803
1547
804
global service
805
service = AvahiService(name = server_settings["servicename"],
806
type = "_mandos._tcp", );
807
if server_settings["interface"]:
808
service.interface = if_nametoindex\
809
(server_settings["interface"])
1548
# Enable all possible GnuTLS debugging
1549
if debug:
1550
# "Use a log level over 10 to enable all debugging options."
1551
# - GnuTLS manual
1552
gnutls.library.functions.gnutls_global_set_log_level(11)
1553
1554
@gnutls.library.types.gnutls_log_func
1555
def debug_gnutls(level, string):
1556
logger.debug(u"GnuTLS: %s", string[:-1])
1557
1558
(gnutls.library.functions
1559
.gnutls_global_set_log_function(debug_gnutls))
810
1560
811
1561
global main_loop
812
global bus
813
global server
814
1562
# From the Avahi example code
815
1563
DBusGMainLoop(set_as_default=True )
816
1564
main_loop = gobject.MainLoop()
817
1565
bus = dbus.SystemBus()
818
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
819
avahi.DBUS_PATH_SERVER),
820
avahi.DBUS_INTERFACE_SERVER)
821
1566
# End of Avahi example code
822
823
def remove_from_clients(client):
824
clients.remove(client)
825
if not clients:
826
logger.critical(u"No clients left, exiting")
827
sys.exit()
828
829
clients.update(Set(Client(name = section,
830
stop_hook = remove_from_clients,
831
config
832
= dict(client_config.items(section)))
833
for section in client_config.sections()))
834
if not clients:
835
logger.critical(u"No clients defined")
836
sys.exit(1)
1567
if use_dbus:
1568
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1569
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1570
service = AvahiService(name = server_settings[u"servicename"],
1571
servicetype = u"_mandos._tcp",
1572
protocol = protocol, bus = bus)
1573
if server_settings["interface"]:
1574
service.interface = (if_nametoindex
1575
(str(server_settings[u"interface"])))
1576
1577
client_class = Client
1578
if use_dbus:
1579
client_class = functools.partial(ClientDBus, bus = bus)
1580
tcp_server.clients.update(set(
1581
client_class(name = section,
1582
config= dict(client_config.items(section)))
1583
for section in client_config.sections()))
1584
if not tcp_server.clients:
1585
logger.warning(u"No clients defined")
837
1586
838
1587
if debug:
839
1588
# Redirect stdin so all checkers get /dev/null
848
1597
daemon()
849
1598
850
1599
try:
851
pid = os.getpid()
852
pidfile.write(str(pid) + "\n")
853
pidfile.close()
1600
with closing(pidfile):
1601
pid = os.getpid()
1602
pidfile.write(str(pid) + "\n")
854
1603
del pidfile
855
except IOError, err:
1604
except IOError:
856
1605
logger.error(u"Could not write to file %r with PID %d",
857
1606
pidfilename, pid)
858
1607
except NameError:
862
1611
863
1612
def cleanup():
864
1613
"Cleanup function; run on exit"
865
global group
866
# From the Avahi example code
867
if not group is None:
868
group.Free()
869
group = None
870
# End of Avahi example code
1614
service.cleanup()
871
1615
872
while clients:
873
client = clients.pop()
874
client.stop_hook = None
875
client.stop()
1616
while tcp_server.clients:
1617
client = tcp_server.clients.pop()
1618
client.disable_hook = None
1619
client.disable()
876
1620
877
1621
atexit.register(cleanup)
878
1622
881
1625
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
882
1626
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
883
1627
884
for client in clients:
885
client.start()
1628
if use_dbus:
1629
class MandosDBusService(dbus.service.Object):
1630
"""A D-Bus proxy object"""
1631
def __init__(self):
1632
dbus.service.Object.__init__(self, bus, u"/")
1633
_interface = u"se.bsnet.fukt.Mandos"
1634
1635
@dbus.service.signal(_interface, signature=u"oa{sv}")
1636
def ClientAdded(self, objpath, properties):
1637
"D-Bus signal"
1638
pass
1639
1640
@dbus.service.signal(_interface, signature=u"s")
1641
def ClientNotFound(self, fingerprint):
1642
"D-Bus signal"
1643
pass
1644
1645
@dbus.service.signal(_interface, signature=u"os")
1646
def ClientRemoved(self, objpath, name):
1647
"D-Bus signal"
1648
pass
1649
1650
@dbus.service.method(_interface, out_signature=u"ao")
1651
def GetAllClients(self):
1652
"D-Bus method"
1653
return dbus.Array(c.dbus_object_path
1654
for c in tcp_server.clients)
1655
1656
@dbus.service.method(_interface,
1657
out_signature=u"a{oa{sv}}")
1658
def GetAllClientsWithProperties(self):
1659
"D-Bus method"
1660
return dbus.Dictionary(
1661
((c.dbus_object_path, c.GetAll(u""))
1662
for c in tcp_server.clients),
1663
signature=u"oa{sv}")
1664
1665
@dbus.service.method(_interface, in_signature=u"o")
1666
def RemoveClient(self, object_path):
1667
"D-Bus method"
1668
for c in tcp_server.clients:
1669
if c.dbus_object_path == object_path:
1670
tcp_server.clients.remove(c)
1671
c.remove_from_connection()
1672
# Don't signal anything except ClientRemoved
1673
c.disable(signal=False)
1674
# Emit D-Bus signal
1675
self.ClientRemoved(object_path, c.name)
1676
return
1677
raise KeyError
1678
1679
del _interface
1680
1681
mandos_dbus_service = MandosDBusService()
1682
1683
for client in tcp_server.clients:
1684
if use_dbus:
1685
# Emit D-Bus signal
1686
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1687
client.GetAll(u""))
1688
client.enable()
886
1689
887
1690
tcp_server.enable()
888
1691
tcp_server.server_activate()
889
1692
890
1693
# Find out what port we got
891
1694
service.port = tcp_server.socket.getsockname()[1]
892
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
893
u" scope_id %d" % tcp_server.socket.getsockname())
1695
if use_ipv6:
1696
logger.info(u"Now listening on address %r, port %d,"
1697
" flowinfo %d, scope_id %d"
1698
% tcp_server.socket.getsockname())
1699
else: # IPv4
1700
logger.info(u"Now listening on address %r, port %d"
1701
% tcp_server.socket.getsockname())
894
1702
895
1703
#service.interface = tcp_server.socket.getsockname()[3]
896
1704
897
1705
try:
898
1706
# From the Avahi example code
899
server.connect_to_signal("StateChanged", server_state_changed)
900
1707
try:
901
server_state_changed(server.GetState())
1708
service.activate()
902
1709
except dbus.exceptions.DBusException, error:
903
1710
logger.critical(u"DBusException: %s", error)
904
1711
sys.exit(1)
906
1713
907
1714
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
908
1715
lambda *args, **kwargs:
909
tcp_server.handle_request\
910
(*args[2:], **kwargs) or True)
1716
(tcp_server.handle_request
1717
(*args[2:], **kwargs) or True))
911
1718
912
1719
logger.debug(u"Starting main loop")
913
main_loop_started = True
914
1720
main_loop.run()
915
1721
except AvahiError, error:
916
logger.critical(u"AvahiError: %s" + unicode(error))
1722
logger.critical(u"AvahiError: %s", error)
917
1723
sys.exit(1)
918
1724
except KeyboardInterrupt:
919
1725
if debug:
920
print
1726
print >> sys.stderr
1727
logger.debug(u"Server received KeyboardInterrupt")
1728
logger.debug(u"Server exiting")
921
1729
922
1730
if __name__ == '__main__':
923
1731
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0