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- Committer: Teddy Hogeborn
- Date: 2008-09-30 07:23:39 UTC
- Revision ID: teddy@fukt.bsnet.se-20080930072339-jn15gyrtfpdk2dhx
* .bzrignore: Added "man" directory (created by "make install-html").
* Makefile: Add "common.ent" dependency to all manual pages.
(htmldir, version, SED): New variables.
(CFLAGS): Add -D option to define VERSION to $(version).
(MANPOST, HTMLPOST): Use $(SED).
(PROGS): Use $(CPROGS)
(CPROGS): New; C-only programs.
(objects): Use $(CPROGS).
(common.ent, mandos, mandos-keygen): New targets; update version
number to $(version).
(clean): Use $(CPROGS).
(check): Depend on "all".
(install-html): Install to $(htmldir).
* common.ent: New file with "version" entity.
* mandos-clients.conf.xml: Use "common.ent".
* mandos-keygen.xml: - '' -
* mandos.conf.xml: - '' -
* mandos.xml: - '' -
* plugin-runner.xml: - '' -
* plugins.d/mandos-client.xml: - '' -
* plugins.d/password-prompt.xml: - '' -
* plugin-runner.c (argp_program_version): Use VERSION.
* plugins.d/mandos-client.c (argp_program_version): - '' -
* plugins.d/password-prompt.c (argp_program_version): - '' -
* Makefile: Add "common.ent" dependency to all manual pages.
(htmldir, version, SED): New variables.
(CFLAGS): Add -D option to define VERSION to $(version).
(MANPOST, HTMLPOST): Use $(SED).
(PROGS): Use $(CPROGS)
(CPROGS): New; C-only programs.
(objects): Use $(CPROGS).
(common.ent, mandos, mandos-keygen): New targets; update version
number to $(version).
(clean): Use $(CPROGS).
(check): Depend on "all".
(install-html): Install to $(htmldir).
* common.ent: New file with "version" entity.
* mandos-clients.conf.xml: Use "common.ent".
* mandos-keygen.xml: - '' -
* mandos.conf.xml: - '' -
* mandos.xml: - '' -
* plugin-runner.xml: - '' -
* plugins.d/mandos-client.xml: - '' -
* plugins.d/password-prompt.xml: - '' -
* plugin-runner.c (argp_program_version): Use VERSION.
* plugins.d/mandos-client.c (argp_program_version): - '' -
* plugins.d/password-prompt.c (argp_program_version): - '' -
- files added:
- debian/mandos-client.config
- files removed:
- NEWS
- 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", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2008 Teddy Hogeborn & Björn Påhlsson
16
15
#
17
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# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
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# Contact the authors at <mandos@fukt.bsnet.se>.
32
31
#
33
32
34
from __future__ import division, with_statement, absolute_import
33
from __future__ import division
35
34
36
import SocketServer as socketserver
35
import SocketServer
37
36
import socket
38
import optparse
37
from optparse import OptionParser
39
38
import datetime
40
39
import errno
41
40
import gnutls.crypto
44
43
import gnutls.library.functions
45
44
import gnutls.library.constants
46
45
import gnutls.library.types
47
import ConfigParser as configparser
46
import ConfigParser
48
47
import sys
49
48
import re
50
49
import os
51
50
import signal
51
from sets import Set
52
52
import subprocess
53
53
import atexit
54
54
import stat
55
55
import logging
56
56
import logging.handlers
57
57
import pwd
58
from contextlib import closing
59
import struct
60
import fcntl
61
import functools
62
58
63
59
import dbus
64
import dbus.service
65
60
import gobject
66
61
import avahi
67
62
from dbus.mainloop.glib import DBusGMainLoop
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63
import ctypes
69
64
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
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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'))
65
66
version = "1.0"
67
68
logger = logging.Logger('mandos')
69
syslogger = logging.handlers.SysLogHandler\
70
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
71
address = "/dev/log")
72
syslogger.setFormatter(logging.Formatter\
73
('Mandos: %(levelname)s: %(message)s'))
91
74
logger.addHandler(syslogger)
92
75
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console = logging.StreamHandler()
94
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
95
u' %(levelname)s:'
96
u' %(message)s'))
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
78
' %(message)s'))
97
79
logger.addHandler(console)
98
80
99
81
class AvahiError(Exception):
100
def __init__(self, value, *args, **kwargs):
82
def __init__(self, value):
101
83
self.value = value
102
super(AvahiError, self).__init__(value, *args, **kwargs)
103
def __unicode__(self):
104
return unicode(repr(self.value))
84
super(AvahiError, self).__init__()
85
def __str__(self):
86
return repr(self.value)
105
87
106
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class AvahiServiceError(AvahiError):
107
89
pass
112
94
113
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class AvahiService(object):
114
96
"""An Avahi (Zeroconf) service.
115
116
97
Attributes:
117
98
interface: integer; avahi.IF_UNSPEC or an interface index.
118
99
Used to optionally bind to the specified interface.
119
name: string; Example: u'Mandos'
120
type: string; Example: u'_mandos._tcp'.
100
name: string; Example: 'Mandos'
101
type: string; Example: '_mandos._tcp'.
121
102
See <http://www.dns-sd.org/ServiceTypes.html>
122
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port: integer; what port to announce
123
104
TXT: list of strings; TXT record for the service
126
107
max_renames: integer; maximum number of renames
127
108
rename_count: integer; counter so we only rename after collisions
128
109
a sensible number of times
129
group: D-Bus Entry Group
130
server: D-Bus Server
131
bus: dbus.SystemBus()
132
110
"""
133
111
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
134
servicetype = None, port = None, TXT = None,
135
domain = u"", host = u"", max_renames = 32768,
136
protocol = avahi.PROTO_UNSPEC, bus = None):
112
servicetype = None, port = None, TXT = None, domain = "",
113
host = "", max_renames = 32768):
137
114
self.interface = interface
138
115
self.name = name
139
116
self.type = servicetype
140
117
self.port = port
141
self.TXT = TXT if TXT is not None else []
118
if TXT is None:
119
self.TXT = []
120
else:
121
self.TXT = TXT
142
122
self.domain = domain
143
123
self.host = host
144
124
self.rename_count = 0
145
125
self.max_renames = max_renames
146
self.protocol = protocol
147
self.group = None # our entry group
148
self.server = None
149
self.bus = bus
150
126
def rename(self):
151
127
"""Derived from the Avahi example code"""
152
128
if self.rename_count >= self.max_renames:
153
129
logger.critical(u"No suitable Zeroconf service name found"
154
130
u" after %i retries, exiting.",
155
131
self.rename_count)
156
raise AvahiServiceError(u"Too many renames")
157
self.name = self.server.GetAlternativeServiceName(self.name)
132
raise AvahiServiceError("Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
158
134
logger.info(u"Changing Zeroconf service name to %r ...",
159
unicode(self.name))
160
syslogger.setFormatter(logging.Formatter
161
(u'Mandos (%s) [%%(process)d]:'
162
u' %%(levelname)s: %%(message)s'
163
% self.name))
135
str(self.name))
136
syslogger.setFormatter(logging.Formatter\
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
164
139
self.remove()
165
140
self.add()
166
141
self.rename_count += 1
167
142
def remove(self):
168
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"""Derived from the Avahi example code"""
169
if self.group is not None:
170
self.group.Reset()
144
if group is not None:
145
group.Reset()
171
146
def add(self):
172
147
"""Derived from the Avahi example code"""
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)
148
global group
149
if group is None:
150
group = dbus.Interface\
151
(bus.get_object(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
181
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
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())
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
228
171
229
172
230
173
class Client(object):
231
174
"""A representation of a client host served by this server.
232
233
175
Attributes:
234
name: string; from the config file, used in log messages and
235
D-Bus identifiers
176
name: string; from the config file, used in log messages
236
177
fingerprint: string (40 or 32 hexadecimal digits); used to
237
178
uniquely identify the client
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.
179
secret: bytestring; sent verbatim (over TLS) to client
180
host: string; available for use by the checker command
181
created: datetime.datetime(); object creation, not client host
182
last_checked_ok: datetime.datetime() or None if not yet checked OK
183
timeout: datetime.timedelta(); How long from last_checked_ok
184
until this client is invalid
185
interval: datetime.timedelta(); How often to start a new checker
186
stop_hook: If set, called by stop() as stop_hook(self)
187
checker: subprocess.Popen(); a running checker process used
188
to see if the client lives.
189
'None' if no process is running.
251
190
checker_initiator_tag: a gobject event source tag, or None
252
disable_initiator_tag: - '' -
191
stop_initiator_tag: - '' -
253
192
checker_callback_tag: - '' -
254
193
checker_command: string; External command which is run to check if
255
194
client lives. %() expansions are done at
256
195
runtime with vars(self) as dict, so that for
257
196
instance %(name)s can be used in the command.
258
current_checker_command: string; current running checker_command
197
Private attibutes:
198
_timeout: Real variable for 'timeout'
199
_interval: Real variable for 'interval'
200
_timeout_milliseconds: Used when calling gobject.timeout_add()
201
_interval_milliseconds: - '' -
259
202
"""
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):
203
def _set_timeout(self, timeout):
204
"Setter function for 'timeout' attribute"
205
self._timeout = timeout
206
self._timeout_milliseconds = ((self.timeout.days
207
* 24 * 60 * 60 * 1000)
208
+ (self.timeout.seconds * 1000)
209
+ (self.timeout.microseconds
210
// 1000))
211
timeout = property(lambda self: self._timeout,
212
_set_timeout)
213
del _set_timeout
214
def _set_interval(self, interval):
215
"Setter function for 'interval' attribute"
216
self._interval = interval
217
self._interval_milliseconds = ((self.interval.days
218
* 24 * 60 * 60 * 1000)
219
+ (self.interval.seconds
220
* 1000)
221
+ (self.interval.microseconds
222
// 1000))
223
interval = property(lambda self: self._interval,
224
_set_interval)
225
del _set_interval
226
def __init__(self, name = None, stop_hook=None, config=None):
277
227
"""Note: the 'checker' key in 'config' sets the
278
228
'checker_command' attribute and *not* the 'checker'
279
229
attribute."""
280
self.name = name
281
230
if config is None:
282
231
config = {}
232
self.name = name
283
233
logger.debug(u"Creating client %r", self.name)
284
234
# Uppercase and remove spaces from fingerprint for later
285
235
# comparison purposes with return value from the fingerprint()
286
236
# function
287
self.fingerprint = (config[u"fingerprint"].upper()
288
.replace(u" ", u""))
237
self.fingerprint = config["fingerprint"].upper()\
238
.replace(u" ", u"")
289
239
logger.debug(u" Fingerprint: %s", self.fingerprint)
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"])))) as secfile:
296
self.secret = secfile.read()
240
if "secret" in config:
241
self.secret = config["secret"].decode(u"base64")
242
elif "secfile" in config:
243
secfile = open(config["secfile"])
244
self.secret = secfile.read()
245
secfile.close()
297
246
else:
298
247
raise TypeError(u"No secret or secfile for client %s"
299
248
% self.name)
300
self.host = config.get(u"host", u"")
301
self.created = datetime.datetime.utcnow()
302
self.enabled = False
303
self.last_enabled = None
249
self.host = config.get("host", "")
250
self.created = datetime.datetime.now()
304
251
self.last_checked_ok = None
305
self.timeout = string_to_delta(config[u"timeout"])
306
self.interval = string_to_delta(config[u"interval"])
307
self.disable_hook = disable_hook
252
self.timeout = string_to_delta(config["timeout"])
253
self.interval = string_to_delta(config["interval"])
254
self.stop_hook = stop_hook
308
255
self.checker = None
309
256
self.checker_initiator_tag = None
310
self.disable_initiator_tag = None
257
self.stop_initiator_tag = None
311
258
self.checker_callback_tag = None
312
self.checker_command = config[u"checker"]
313
self.current_checker_command = None
314
self.last_connect = None
315
316
def enable(self):
259
self.check_command = config["checker"]
260
def start(self):
317
261
"""Start this client's checker and timeout hooks"""
318
if getattr(self, u"enabled", False):
319
# Already enabled
320
return
321
self.last_enabled = datetime.datetime.utcnow()
322
262
# Schedule a new checker to be started an 'interval' from now,
323
263
# and every interval from then on.
324
self.checker_initiator_tag = (gobject.timeout_add
325
(self.interval_milliseconds(),
326
self.start_checker))
264
self.checker_initiator_tag = gobject.timeout_add\
265
(self._interval_milliseconds,
266
self.start_checker)
327
267
# Also start a new checker *right now*.
328
268
self.start_checker()
329
# Schedule a disable() when 'timeout' has passed
330
self.disable_initiator_tag = (gobject.timeout_add
331
(self.timeout_milliseconds(),
332
self.disable))
333
self.enabled = True
334
335
def disable(self):
336
"""Disable this client."""
337
if not getattr(self, "enabled", False):
269
# Schedule a stop() when 'timeout' has passed
270
self.stop_initiator_tag = gobject.timeout_add\
271
(self._timeout_milliseconds,
272
self.stop)
273
def stop(self):
274
"""Stop this client.
275
The possibility that a client might be restarted is left open,
276
but not currently used."""
277
# If this client doesn't have a secret, it is already stopped.
278
if hasattr(self, "secret") and self.secret:
279
logger.info(u"Stopping client %s", self.name)
280
self.secret = None
281
else:
338
282
return False
339
logger.info(u"Disabling client %s", self.name)
340
if getattr(self, u"disable_initiator_tag", False):
341
gobject.source_remove(self.disable_initiator_tag)
342
self.disable_initiator_tag = None
343
if getattr(self, u"checker_initiator_tag", False):
283
if getattr(self, "stop_initiator_tag", False):
284
gobject.source_remove(self.stop_initiator_tag)
285
self.stop_initiator_tag = None
286
if getattr(self, "checker_initiator_tag", False):
344
287
gobject.source_remove(self.checker_initiator_tag)
345
288
self.checker_initiator_tag = None
346
289
self.stop_checker()
347
if self.disable_hook:
348
self.disable_hook(self)
349
self.enabled = False
290
if self.stop_hook:
291
self.stop_hook(self)
350
292
# Do not run this again if called by a gobject.timeout_add
351
293
return False
352
353
294
def __del__(self):
354
self.disable_hook = None
355
self.disable()
356
357
def checker_callback(self, pid, condition, command):
295
self.stop_hook = None
296
self.stop()
297
def checker_callback(self, pid, condition):
358
298
"""The checker has completed, so take appropriate actions."""
299
now = datetime.datetime.now()
359
300
self.checker_callback_tag = None
360
301
self.checker = None
361
if os.WIFEXITED(condition):
362
exitstatus = os.WEXITSTATUS(condition)
363
if exitstatus == 0:
364
logger.info(u"Checker for %(name)s succeeded",
365
vars(self))
366
self.checked_ok()
367
else:
368
logger.info(u"Checker for %(name)s failed",
369
vars(self))
370
else:
302
if os.WIFEXITED(condition) \
303
and (os.WEXITSTATUS(condition) == 0):
304
logger.info(u"Checker for %(name)s succeeded",
305
vars(self))
306
self.last_checked_ok = now
307
gobject.source_remove(self.stop_initiator_tag)
308
self.stop_initiator_tag = gobject.timeout_add\
309
(self._timeout_milliseconds,
310
self.stop)
311
elif not os.WIFEXITED(condition):
371
312
logger.warning(u"Checker for %(name)s crashed?",
372
313
vars(self))
373
374
def checked_ok(self):
375
"""Bump up the timeout for this client.
376
377
This should only be called when the client has been seen,
378
alive and well.
379
"""
380
self.last_checked_ok = datetime.datetime.utcnow()
381
gobject.source_remove(self.disable_initiator_tag)
382
self.disable_initiator_tag = (gobject.timeout_add
383
(self.timeout_milliseconds(),
384
self.disable))
385
314
else:
315
logger.info(u"Checker for %(name)s failed",
316
vars(self))
386
317
def start_checker(self):
387
318
"""Start a new checker subprocess if one is not running.
388
389
319
If a checker already exists, leave it running and do
390
320
nothing."""
391
321
# The reason for not killing a running checker is that if we
396
326
# checkers alone, the checker would have to take more time
397
327
# than 'timeout' for the client to be declared invalid, which
398
328
# is as it should be.
399
400
# If a checker exists, make sure it is not a zombie
401
if self.checker is not None:
402
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
403
if pid:
404
logger.warning(u"Checker was a zombie")
405
gobject.source_remove(self.checker_callback_tag)
406
self.checker_callback(pid, status,
407
self.current_checker_command)
408
# Start a new checker if needed
409
329
if self.checker is None:
410
330
try:
411
# In case checker_command has exactly one % operator
412
command = self.checker_command % self.host
331
# In case check_command has exactly one % operator
332
command = self.check_command % self.host
413
333
except TypeError:
414
334
# Escape attributes for the shell
415
escaped_attrs = dict((key,
416
re.escape(unicode(str(val),
417
errors=
418
u'replace')))
335
escaped_attrs = dict((key, re.escape(str(val)))
419
336
for key, val in
420
337
vars(self).iteritems())
421
338
try:
422
command = self.checker_command % escaped_attrs
339
command = self.check_command % escaped_attrs
423
340
except TypeError, error:
424
341
logger.error(u'Could not format string "%s":'
425
u' %s', self.checker_command, error)
342
u' %s', self.check_command, error)
426
343
return True # Try again later
427
self.current_checker_command = command
428
344
try:
429
345
logger.info(u"Starting checker %r for %s",
430
346
command, self.name)
434
350
# always replaced by /dev/null.)
435
351
self.checker = subprocess.Popen(command,
436
352
close_fds=True,
437
shell=True, cwd=u"/")
438
self.checker_callback_tag = (gobject.child_watch_add
439
(self.checker.pid,
440
self.checker_callback,
441
data=command))
442
# The checker may have completed before the gobject
443
# watch was added. Check for this.
444
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
445
if pid:
446
gobject.source_remove(self.checker_callback_tag)
447
self.checker_callback(pid, status, command)
353
shell=True, cwd="/")
354
self.checker_callback_tag = gobject.child_watch_add\
355
(self.checker.pid,
356
self.checker_callback)
448
357
except OSError, error:
449
358
logger.error(u"Failed to start subprocess: %s",
450
359
error)
451
360
# Re-run this periodically if run by gobject.timeout_add
452
361
return True
453
454
362
def stop_checker(self):
455
363
"""Force the checker process, if any, to stop."""
456
364
if self.checker_callback_tag:
457
365
gobject.source_remove(self.checker_callback_tag)
458
366
self.checker_callback_tag = None
459
if getattr(self, u"checker", None) is None:
367
if getattr(self, "checker", None) is None:
460
368
return
461
369
logger.debug(u"Stopping checker for %(name)s", vars(self))
462
370
try:
468
376
if error.errno != errno.ESRCH: # No such process
469
377
raise
470
378
self.checker = None
471
472
379
def still_valid(self):
473
380
"""Has the timeout not yet passed for this client?"""
474
if not getattr(self, u"enabled", False):
475
return False
476
now = datetime.datetime.utcnow()
381
now = datetime.datetime.now()
477
382
if self.last_checked_ok is None:
478
383
return now < (self.created + self.timeout)
479
384
else:
480
385
return now < (self.last_checked_ok + self.timeout)
481
386
482
387
483
def dbus_service_property(dbus_interface, signature=u"v",
484
access=u"readwrite", byte_arrays=False):
485
"""Decorators for marking methods of a DBusObjectWithProperties to
486
become properties on the D-Bus.
487
488
The decorated method will be called with no arguments by "Get"
489
and with one argument by "Set".
490
491
The parameters, where they are supported, are the same as
492
dbus.service.method, except there is only "signature", since the
493
type from Get() and the type sent to Set() is the same.
494
"""
495
def decorator(func):
496
func._dbus_is_property = True
497
func._dbus_interface = dbus_interface
498
func._dbus_signature = signature
499
func._dbus_access = access
500
func._dbus_name = func.__name__
501
if func._dbus_name.endswith(u"_dbus_property"):
502
func._dbus_name = func._dbus_name[:-14]
503
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
504
return func
505
return decorator
506
507
508
class DBusPropertyException(dbus.exceptions.DBusException):
509
"""A base class for D-Bus property-related exceptions
510
"""
511
def __unicode__(self):
512
return unicode(str(self))
513
514
515
class DBusPropertyAccessException(DBusPropertyException):
516
"""A property's access permissions disallows an operation.
517
"""
518
pass
519
520
521
class DBusPropertyNotFound(DBusPropertyException):
522
"""An attempt was made to access a non-existing property.
523
"""
524
pass
525
526
527
class DBusObjectWithProperties(dbus.service.Object):
528
"""A D-Bus object with properties.
529
530
Classes inheriting from this can use the dbus_service_property
531
decorator to expose methods as D-Bus properties. It exposes the
532
standard Get(), Set(), and GetAll() methods on the D-Bus.
533
"""
534
535
@staticmethod
536
def _is_dbus_property(obj):
537
return getattr(obj, u"_dbus_is_property", False)
538
539
def _get_all_dbus_properties(self):
540
"""Returns a generator of (name, attribute) pairs
541
"""
542
return ((prop._dbus_name, prop)
543
for name, prop in
544
inspect.getmembers(self, self._is_dbus_property))
545
546
def _get_dbus_property(self, interface_name, property_name):
547
"""Returns a bound method if one exists which is a D-Bus
548
property with the specified name and interface.
549
"""
550
for name in (property_name,
551
property_name + u"_dbus_property"):
552
prop = getattr(self, name, None)
553
if (prop is None
554
or not self._is_dbus_property(prop)
555
or prop._dbus_name != property_name
556
or (interface_name and prop._dbus_interface
557
and interface_name != prop._dbus_interface)):
558
continue
559
return prop
560
# No such property
561
raise DBusPropertyNotFound(self.dbus_object_path + u":"
562
+ interface_name + u"."
563
+ property_name)
564
565
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
566
out_signature=u"v")
567
def Get(self, interface_name, property_name):
568
"""Standard D-Bus property Get() method, see D-Bus standard.
569
"""
570
prop = self._get_dbus_property(interface_name, property_name)
571
if prop._dbus_access == u"write":
572
raise DBusPropertyAccessException(property_name)
573
value = prop()
574
if not hasattr(value, u"variant_level"):
575
return value
576
return type(value)(value, variant_level=value.variant_level+1)
577
578
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
579
def Set(self, interface_name, property_name, value):
580
"""Standard D-Bus property Set() method, see D-Bus standard.
581
"""
582
prop = self._get_dbus_property(interface_name, property_name)
583
if prop._dbus_access == u"read":
584
raise DBusPropertyAccessException(property_name)
585
if prop._dbus_get_args_options[u"byte_arrays"]:
586
value = dbus.ByteArray(''.join(unichr(byte)
587
for byte in value))
588
prop(value)
589
590
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
591
out_signature=u"a{sv}")
592
def GetAll(self, interface_name):
593
"""Standard D-Bus property GetAll() method, see D-Bus
594
standard.
595
596
Note: Will not include properties with access="write".
597
"""
598
all = {}
599
for name, prop in self._get_all_dbus_properties():
600
if (interface_name
601
and interface_name != prop._dbus_interface):
602
# Interface non-empty but did not match
603
continue
604
# Ignore write-only properties
605
if prop._dbus_access == u"write":
606
continue
607
value = prop()
608
if not hasattr(value, u"variant_level"):
609
all[name] = value
610
continue
611
all[name] = type(value)(value, variant_level=
612
value.variant_level+1)
613
return dbus.Dictionary(all, signature=u"sv")
614
615
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
616
out_signature=u"s",
617
path_keyword='object_path',
618
connection_keyword='connection')
619
def Introspect(self, object_path, connection):
620
"""Standard D-Bus method, overloaded to insert property tags.
621
"""
622
xmlstring = dbus.service.Object.Introspect(self, object_path,
623
connection)
624
document = xml.dom.minidom.parseString(xmlstring)
625
del xmlstring
626
def make_tag(document, name, prop):
627
e = document.createElement(u"property")
628
e.setAttribute(u"name", name)
629
e.setAttribute(u"type", prop._dbus_signature)
630
e.setAttribute(u"access", prop._dbus_access)
631
return e
632
for if_tag in document.getElementsByTagName(u"interface"):
633
for tag in (make_tag(document, name, prop)
634
for name, prop
635
in self._get_all_dbus_properties()
636
if prop._dbus_interface
637
== if_tag.getAttribute(u"name")):
638
if_tag.appendChild(tag)
639
xmlstring = document.toxml(u"utf-8")
640
document.unlink()
641
return xmlstring
642
643
644
class ClientDBus(Client, DBusObjectWithProperties):
645
"""A Client class using D-Bus
646
647
Attributes:
648
dbus_object_path: dbus.ObjectPath
649
bus: dbus.SystemBus()
650
"""
651
# dbus.service.Object doesn't use super(), so we can't either.
652
653
def __init__(self, bus = None, *args, **kwargs):
654
self.bus = bus
655
Client.__init__(self, *args, **kwargs)
656
# Only now, when this client is initialized, can it show up on
657
# the D-Bus
658
self.dbus_object_path = (dbus.ObjectPath
659
(u"/clients/"
660
+ self.name.replace(u".", u"_")))
661
DBusObjectWithProperties.__init__(self, self.bus,
662
self.dbus_object_path)
663
664
@staticmethod
665
def _datetime_to_dbus(dt, variant_level=0):
666
"""Convert a UTC datetime.datetime() to a D-Bus type."""
667
return dbus.String(dt.isoformat(),
668
variant_level=variant_level)
669
670
def enable(self):
671
oldstate = getattr(self, u"enabled", False)
672
r = Client.enable(self)
673
if oldstate != self.enabled:
674
# Emit D-Bus signals
675
self.PropertyChanged(dbus.String(u"enabled"),
676
dbus.Boolean(True, variant_level=1))
677
self.PropertyChanged(
678
dbus.String(u"last_enabled"),
679
self._datetime_to_dbus(self.last_enabled,
680
variant_level=1))
681
return r
682
683
def disable(self, signal = True):
684
oldstate = getattr(self, u"enabled", False)
685
r = Client.disable(self)
686
if signal and oldstate != self.enabled:
687
# Emit D-Bus signal
688
self.PropertyChanged(dbus.String(u"enabled"),
689
dbus.Boolean(False, variant_level=1))
690
return r
691
692
def __del__(self, *args, **kwargs):
693
try:
694
self.remove_from_connection()
695
except LookupError:
696
pass
697
if hasattr(DBusObjectWithProperties, u"__del__"):
698
DBusObjectWithProperties.__del__(self, *args, **kwargs)
699
Client.__del__(self, *args, **kwargs)
700
701
def checker_callback(self, pid, condition, command,
702
*args, **kwargs):
703
self.checker_callback_tag = None
704
self.checker = None
705
# Emit D-Bus signal
706
self.PropertyChanged(dbus.String(u"checker_running"),
707
dbus.Boolean(False, variant_level=1))
708
if os.WIFEXITED(condition):
709
exitstatus = os.WEXITSTATUS(condition)
710
# Emit D-Bus signal
711
self.CheckerCompleted(dbus.Int16(exitstatus),
712
dbus.Int64(condition),
713
dbus.String(command))
714
else:
715
# Emit D-Bus signal
716
self.CheckerCompleted(dbus.Int16(-1),
717
dbus.Int64(condition),
718
dbus.String(command))
719
720
return Client.checker_callback(self, pid, condition, command,
721
*args, **kwargs)
722
723
def checked_ok(self, *args, **kwargs):
724
r = Client.checked_ok(self, *args, **kwargs)
725
# Emit D-Bus signal
726
self.PropertyChanged(
727
dbus.String(u"last_checked_ok"),
728
(self._datetime_to_dbus(self.last_checked_ok,
729
variant_level=1)))
730
return r
731
732
def start_checker(self, *args, **kwargs):
733
old_checker = self.checker
734
if self.checker is not None:
735
old_checker_pid = self.checker.pid
736
else:
737
old_checker_pid = None
738
r = Client.start_checker(self, *args, **kwargs)
739
# Only if new checker process was started
740
if (self.checker is not None
741
and old_checker_pid != self.checker.pid):
742
# Emit D-Bus signal
743
self.CheckerStarted(self.current_checker_command)
744
self.PropertyChanged(
745
dbus.String(u"checker_running"),
746
dbus.Boolean(True, variant_level=1))
747
return r
748
749
def stop_checker(self, *args, **kwargs):
750
old_checker = getattr(self, u"checker", None)
751
r = Client.stop_checker(self, *args, **kwargs)
752
if (old_checker is not None
753
and getattr(self, u"checker", None) is None):
754
self.PropertyChanged(dbus.String(u"checker_running"),
755
dbus.Boolean(False, variant_level=1))
756
return r
757
758
## D-Bus methods & signals
759
_interface = u"se.bsnet.fukt.Mandos.Client"
760
761
# CheckerCompleted - signal
762
@dbus.service.signal(_interface, signature=u"nxs")
763
def CheckerCompleted(self, exitcode, waitstatus, command):
764
"D-Bus signal"
765
pass
766
767
# CheckerStarted - signal
768
@dbus.service.signal(_interface, signature=u"s")
769
def CheckerStarted(self, command):
770
"D-Bus signal"
771
pass
772
773
# PropertyChanged - signal
774
@dbus.service.signal(_interface, signature=u"sv")
775
def PropertyChanged(self, property, value):
776
"D-Bus signal"
777
pass
778
779
# ReceivedSecret - signal
780
@dbus.service.signal(_interface)
781
def ReceivedSecret(self):
782
"D-Bus signal"
783
pass
784
785
# Rejected - signal
786
@dbus.service.signal(_interface)
787
def Rejected(self):
788
"D-Bus signal"
789
pass
790
791
# name - property
792
@dbus_service_property(_interface, signature=u"s", access=u"read")
793
def name_dbus_property(self):
794
return dbus.String(self.name)
795
796
# fingerprint - property
797
@dbus_service_property(_interface, signature=u"s", access=u"read")
798
def fingerprint_dbus_property(self):
799
return dbus.String(self.fingerprint)
800
801
# host - property
802
@dbus_service_property(_interface, signature=u"s",
803
access=u"readwrite")
804
def host_dbus_property(self, value=None):
805
if value is None: # get
806
return dbus.String(self.host)
807
self.host = value
808
# Emit D-Bus signal
809
self.PropertyChanged(dbus.String(u"host"),
810
dbus.String(value, variant_level=1))
811
812
# created - property
813
@dbus_service_property(_interface, signature=u"s", access=u"read")
814
def created_dbus_property(self):
815
return dbus.String(self._datetime_to_dbus(self.created))
816
817
# last_enabled - property
818
@dbus_service_property(_interface, signature=u"s", access=u"read")
819
def last_enabled_dbus_property(self):
820
if self.last_enabled is None:
821
return dbus.String(u"")
822
return dbus.String(self._datetime_to_dbus(self.last_enabled))
823
824
# enabled - property
825
@dbus_service_property(_interface, signature=u"b",
826
access=u"readwrite")
827
def enabled_dbus_property(self, value=None):
828
if value is None: # get
829
return dbus.Boolean(self.enabled)
830
if value:
831
self.enable()
832
else:
833
self.disable()
834
835
# last_checked_ok - property
836
@dbus_service_property(_interface, signature=u"s", access=u"read")
837
def last_checked_ok_dbus_property(self):
838
if self.last_checked_ok is None:
839
return dbus.String(u"")
840
return dbus.String(self._datetime_to_dbus(self
841
.last_checked_ok))
842
843
# timeout - property
844
@dbus_service_property(_interface, signature=u"t",
845
access=u"readwrite")
846
def timeout_dbus_property(self, value=None):
847
if value is None: # get
848
return dbus.UInt64(self.timeout_milliseconds())
849
self.timeout = datetime.timedelta(0, 0, 0, value)
850
# Emit D-Bus signal
851
self.PropertyChanged(dbus.String(u"timeout"),
852
dbus.UInt64(value, variant_level=1))
853
if getattr(self, u"disable_initiator_tag", None) is None:
854
return
855
# Reschedule timeout
856
gobject.source_remove(self.disable_initiator_tag)
857
self.disable_initiator_tag = None
858
time_to_die = (self.
859
_timedelta_to_milliseconds((self
860
.last_checked_ok
861
+ self.timeout)
862
- datetime.datetime
863
.utcnow()))
864
if time_to_die <= 0:
865
# The timeout has passed
866
self.disable()
867
else:
868
self.disable_initiator_tag = (gobject.timeout_add
869
(time_to_die, self.disable))
870
871
# interval - property
872
@dbus_service_property(_interface, signature=u"t",
873
access=u"readwrite")
874
def interval_dbus_property(self, value=None):
875
if value is None: # get
876
return dbus.UInt64(self.interval_milliseconds())
877
self.interval = datetime.timedelta(0, 0, 0, value)
878
# Emit D-Bus signal
879
self.PropertyChanged(dbus.String(u"interval"),
880
dbus.UInt64(value, variant_level=1))
881
if getattr(self, u"checker_initiator_tag", None) is None:
882
return
883
# Reschedule checker run
884
gobject.source_remove(self.checker_initiator_tag)
885
self.checker_initiator_tag = (gobject.timeout_add
886
(value, self.start_checker))
887
self.start_checker() # Start one now, too
888
889
# checker - property
890
@dbus_service_property(_interface, signature=u"s",
891
access=u"readwrite")
892
def checker_dbus_property(self, value=None):
893
if value is None: # get
894
return dbus.String(self.checker_command)
895
self.checker_command = value
896
# Emit D-Bus signal
897
self.PropertyChanged(dbus.String(u"checker"),
898
dbus.String(self.checker_command,
899
variant_level=1))
900
901
# checker_running - property
902
@dbus_service_property(_interface, signature=u"b",
903
access=u"readwrite")
904
def checker_running_dbus_property(self, value=None):
905
if value is None: # get
906
return dbus.Boolean(self.checker is not None)
907
if value:
908
self.start_checker()
909
else:
910
self.stop_checker()
911
912
# object_path - property
913
@dbus_service_property(_interface, signature=u"o", access=u"read")
914
def object_path_dbus_property(self):
915
return self.dbus_object_path # is already a dbus.ObjectPath
916
917
# secret = property xxx
918
@dbus_service_property(_interface, signature=u"ay",
919
access=u"write", byte_arrays=True)
920
def secret_dbus_property(self, value):
921
self.secret = str(value)
922
923
del _interface
924
925
926
class ClientHandler(socketserver.BaseRequestHandler, object):
927
"""A class to handle client connections.
928
929
Instantiated once for each connection to handle it.
388
def peer_certificate(session):
389
"Return the peer's OpenPGP certificate as a bytestring"
390
# If not an OpenPGP certificate...
391
if gnutls.library.functions.gnutls_certificate_type_get\
392
(session._c_object) \
393
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
394
# ...do the normal thing
395
return session.peer_certificate
396
list_size = ctypes.c_uint()
397
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
398
(session._c_object, ctypes.byref(list_size))
399
if list_size.value == 0:
400
return None
401
cert = cert_list[0]
402
return ctypes.string_at(cert.data, cert.size)
403
404
405
def fingerprint(openpgp):
406
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
407
# New GnuTLS "datum" with the OpenPGP public key
408
datum = gnutls.library.types.gnutls_datum_t\
409
(ctypes.cast(ctypes.c_char_p(openpgp),
410
ctypes.POINTER(ctypes.c_ubyte)),
411
ctypes.c_uint(len(openpgp)))
412
# New empty GnuTLS certificate
413
crt = gnutls.library.types.gnutls_openpgp_crt_t()
414
gnutls.library.functions.gnutls_openpgp_crt_init\
415
(ctypes.byref(crt))
416
# Import the OpenPGP public key into the certificate
417
gnutls.library.functions.gnutls_openpgp_crt_import\
418
(crt, ctypes.byref(datum),
419
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
420
# Verify the self signature in the key
421
crtverify = ctypes.c_uint()
422
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
423
(crt, 0, ctypes.byref(crtverify))
424
if crtverify.value != 0:
425
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
426
raise gnutls.errors.CertificateSecurityError("Verify failed")
427
# New buffer for the fingerprint
428
buf = ctypes.create_string_buffer(20)
429
buf_len = ctypes.c_size_t()
430
# Get the fingerprint from the certificate into the buffer
431
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
432
(crt, ctypes.byref(buf), ctypes.byref(buf_len))
433
# Deinit the certificate
434
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
435
# Convert the buffer to a Python bytestring
436
fpr = ctypes.string_at(buf, buf_len.value)
437
# Convert the bytestring to hexadecimal notation
438
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
439
return hex_fpr
440
441
442
class TCP_handler(SocketServer.BaseRequestHandler, object):
443
"""A TCP request handler class.
444
Instantiated by IPv6_TCPServer for each request to handle it.
930
445
Note: This will run in its own forked process."""
931
446
932
447
def handle(self):
933
448
logger.info(u"TCP connection from: %s",
934
unicode(self.client_address))
935
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
936
# Open IPC pipe to parent process
937
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
938
session = (gnutls.connection
939
.ClientSession(self.request,
940
gnutls.connection
941
.X509Credentials()))
942
943
line = self.request.makefile().readline()
944
logger.debug(u"Protocol version: %r", line)
945
try:
946
if int(line.strip().split()[0]) > 1:
947
raise RuntimeError
948
except (ValueError, IndexError, RuntimeError), error:
949
logger.error(u"Unknown protocol version: %s", error)
950
return
951
952
# Note: gnutls.connection.X509Credentials is really a
953
# generic GnuTLS certificate credentials object so long as
954
# no X.509 keys are added to it. Therefore, we can use it
955
# here despite using OpenPGP certificates.
956
957
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
958
# u"+AES-256-CBC", u"+SHA1",
959
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
960
# u"+DHE-DSS"))
961
# Use a fallback default, since this MUST be set.
962
priority = self.server.gnutls_priority
963
if priority is None:
964
priority = u"NORMAL"
965
(gnutls.library.functions
966
.gnutls_priority_set_direct(session._c_object,
967
priority, None))
968
969
try:
970
session.handshake()
971
except gnutls.errors.GNUTLSError, error:
972
logger.warning(u"Handshake failed: %s", error)
973
# Do not run session.bye() here: the session is not
974
# established. Just abandon the request.
975
return
976
logger.debug(u"Handshake succeeded")
977
try:
978
fpr = self.fingerprint(self.peer_certificate(session))
979
except (TypeError, gnutls.errors.GNUTLSError), error:
980
logger.warning(u"Bad certificate: %s", error)
981
session.bye()
982
return
983
logger.debug(u"Fingerprint: %s", fpr)
984
985
for c in self.server.clients:
986
if c.fingerprint == fpr:
987
client = c
988
break
989
else:
990
ipc.write(u"NOTFOUND %s %s\n"
991
% (fpr, unicode(self.client_address)))
992
session.bye()
993
return
994
# Have to check if client.still_valid(), since it is
995
# possible that the client timed out while establishing
996
# the GnuTLS session.
997
if not client.still_valid():
998
ipc.write(u"INVALID %s\n" % client.name)
999
session.bye()
1000
return
1001
ipc.write(u"SENDING %s\n" % client.name)
1002
sent_size = 0
1003
while sent_size < len(client.secret):
1004
sent = session.send(client.secret[sent_size:])
1005
logger.debug(u"Sent: %d, remaining: %d",
1006
sent, len(client.secret)
1007
- (sent_size + sent))
1008
sent_size += sent
1009
session.bye()
1010
1011
@staticmethod
1012
def peer_certificate(session):
1013
"Return the peer's OpenPGP certificate as a bytestring"
1014
# If not an OpenPGP certificate...
1015
if (gnutls.library.functions
1016
.gnutls_certificate_type_get(session._c_object)
1017
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1018
# ...do the normal thing
1019
return session.peer_certificate
1020
list_size = ctypes.c_uint(1)
1021
cert_list = (gnutls.library.functions
1022
.gnutls_certificate_get_peers
1023
(session._c_object, ctypes.byref(list_size)))
1024
if not bool(cert_list) and list_size.value != 0:
1025
raise gnutls.errors.GNUTLSError(u"error getting peer"
1026
u" certificate")
1027
if list_size.value == 0:
1028
return None
1029
cert = cert_list[0]
1030
return ctypes.string_at(cert.data, cert.size)
1031
1032
@staticmethod
1033
def fingerprint(openpgp):
1034
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1035
# New GnuTLS "datum" with the OpenPGP public key
1036
datum = (gnutls.library.types
1037
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1038
ctypes.POINTER
1039
(ctypes.c_ubyte)),
1040
ctypes.c_uint(len(openpgp))))
1041
# New empty GnuTLS certificate
1042
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1043
(gnutls.library.functions
1044
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1045
# Import the OpenPGP public key into the certificate
1046
(gnutls.library.functions
1047
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1048
gnutls.library.constants
1049
.GNUTLS_OPENPGP_FMT_RAW))
1050
# Verify the self signature in the key
1051
crtverify = ctypes.c_uint()
1052
(gnutls.library.functions
1053
.gnutls_openpgp_crt_verify_self(crt, 0,
1054
ctypes.byref(crtverify)))
1055
if crtverify.value != 0:
1056
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1057
raise (gnutls.errors.CertificateSecurityError
1058
(u"Verify failed"))
1059
# New buffer for the fingerprint
1060
buf = ctypes.create_string_buffer(20)
1061
buf_len = ctypes.c_size_t()
1062
# Get the fingerprint from the certificate into the buffer
1063
(gnutls.library.functions
1064
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1065
ctypes.byref(buf_len)))
1066
# Deinit the certificate
1067
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1068
# Convert the buffer to a Python bytestring
1069
fpr = ctypes.string_at(buf, buf_len.value)
1070
# Convert the bytestring to hexadecimal notation
1071
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1072
return hex_fpr
1073
1074
1075
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1076
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1077
def process_request(self, request, client_address):
1078
"""Overrides and wraps the original process_request().
1079
1080
This function creates a new pipe in self.pipe
1081
"""
1082
self.pipe = os.pipe()
1083
super(ForkingMixInWithPipe,
1084
self).process_request(request, client_address)
1085
os.close(self.pipe[1]) # close write end
1086
self.add_pipe(self.pipe[0])
1087
def add_pipe(self, pipe):
1088
"""Dummy function; override as necessary"""
1089
os.close(pipe)
1090
1091
1092
class IPv6_TCPServer(ForkingMixInWithPipe,
1093
socketserver.TCPServer, object):
1094
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1095
449
unicode(self.client_address))
450
session = gnutls.connection.ClientSession\
451
(self.request, gnutls.connection.X509Credentials())
452
453
line = self.request.makefile().readline()
454
logger.debug(u"Protocol version: %r", line)
455
try:
456
if int(line.strip().split()[0]) > 1:
457
raise RuntimeError
458
except (ValueError, IndexError, RuntimeError), error:
459
logger.error(u"Unknown protocol version: %s", error)
460
return
461
462
# Note: gnutls.connection.X509Credentials is really a generic
463
# GnuTLS certificate credentials object so long as no X.509
464
# keys are added to it. Therefore, we can use it here despite
465
# using OpenPGP certificates.
466
467
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
468
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
469
# "+DHE-DSS"))
470
priority = "NORMAL" # Fallback default, since this
471
# MUST be set.
472
if self.server.settings["priority"]:
473
priority = self.server.settings["priority"]
474
gnutls.library.functions.gnutls_priority_set_direct\
475
(session._c_object, priority, None)
476
477
try:
478
session.handshake()
479
except gnutls.errors.GNUTLSError, error:
480
logger.warning(u"Handshake failed: %s", error)
481
# Do not run session.bye() here: the session is not
482
# established. Just abandon the request.
483
return
484
try:
485
fpr = fingerprint(peer_certificate(session))
486
except (TypeError, gnutls.errors.GNUTLSError), error:
487
logger.warning(u"Bad certificate: %s", error)
488
session.bye()
489
return
490
logger.debug(u"Fingerprint: %s", fpr)
491
client = None
492
for c in self.server.clients:
493
if c.fingerprint == fpr:
494
client = c
495
break
496
if not client:
497
logger.warning(u"Client not found for fingerprint: %s",
498
fpr)
499
session.bye()
500
return
501
# Have to check if client.still_valid(), since it is possible
502
# that the client timed out while establishing the GnuTLS
503
# session.
504
if not client.still_valid():
505
logger.warning(u"Client %(name)s is invalid",
506
vars(client))
507
session.bye()
508
return
509
sent_size = 0
510
while sent_size < len(client.secret):
511
sent = session.send(client.secret[sent_size:])
512
logger.debug(u"Sent: %d, remaining: %d",
513
sent, len(client.secret)
514
- (sent_size + sent))
515
sent_size += sent
516
session.bye()
517
518
519
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
520
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1096
521
Attributes:
522
settings: Server settings
523
clients: Set() of Client objects
1097
524
enabled: Boolean; whether this server is activated yet
1098
interface: None or a network interface name (string)
1099
use_ipv6: Boolean; to use IPv6 or not
1100
525
"""
1101
def __init__(self, server_address, RequestHandlerClass,
1102
interface=None, use_ipv6=True):
1103
self.interface = interface
1104
if use_ipv6:
1105
self.address_family = socket.AF_INET6
1106
socketserver.TCPServer.__init__(self, server_address,
1107
RequestHandlerClass)
526
address_family = socket.AF_INET6
527
def __init__(self, *args, **kwargs):
528
if "settings" in kwargs:
529
self.settings = kwargs["settings"]
530
del kwargs["settings"]
531
if "clients" in kwargs:
532
self.clients = kwargs["clients"]
533
del kwargs["clients"]
534
self.enabled = False
535
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1108
536
def server_bind(self):
1109
537
"""This overrides the normal server_bind() function
1110
538
to bind to an interface if one was specified, and also NOT to
1111
539
bind to an address or port if they were not specified."""
1112
if self.interface is not None:
1113
if SO_BINDTODEVICE is None:
1114
logger.error(u"SO_BINDTODEVICE does not exist;"
1115
u" cannot bind to interface %s",
1116
self.interface)
1117
else:
1118
try:
1119
self.socket.setsockopt(socket.SOL_SOCKET,
1120
SO_BINDTODEVICE,
1121
str(self.interface
1122
+ u'\0'))
1123
except socket.error, error:
1124
if error[0] == errno.EPERM:
1125
logger.error(u"No permission to"
1126
u" bind to interface %s",
1127
self.interface)
1128
elif error[0] == errno.ENOPROTOOPT:
1129
logger.error(u"SO_BINDTODEVICE not available;"
1130
u" cannot bind to interface %s",
1131
self.interface)
1132
else:
1133
raise
540
if self.settings["interface"]:
541
# 25 is from /usr/include/asm-i486/socket.h
542
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
543
try:
544
self.socket.setsockopt(socket.SOL_SOCKET,
545
SO_BINDTODEVICE,
546
self.settings["interface"])
547
except socket.error, error:
548
if error[0] == errno.EPERM:
549
logger.error(u"No permission to"
550
u" bind to interface %s",
551
self.settings["interface"])
552
else:
553
raise error
1134
554
# Only bind(2) the socket if we really need to.
1135
555
if self.server_address[0] or self.server_address[1]:
1136
556
if not self.server_address[0]:
1137
if self.address_family == socket.AF_INET6:
1138
any_address = u"::" # in6addr_any
1139
else:
1140
any_address = socket.INADDR_ANY
1141
self.server_address = (any_address,
557
in6addr_any = "::"
558
self.server_address = (in6addr_any,
1142
559
self.server_address[1])
1143
560
elif not self.server_address[1]:
1144
561
self.server_address = (self.server_address[0],
1145
562
0)
1146
# if self.interface:
563
# if self.settings["interface"]:
1147
564
# self.server_address = (self.server_address[0],
1148
565
# 0, # port
1149
566
# 0, # flowinfo
1150
567
# if_nametoindex
1151
# (self.interface))
1152
return socketserver.TCPServer.server_bind(self)
1153
1154
1155
class MandosServer(IPv6_TCPServer):
1156
"""Mandos server.
1157
1158
Attributes:
1159
clients: set of Client objects
1160
gnutls_priority GnuTLS priority string
1161
use_dbus: Boolean; to emit D-Bus signals or not
1162
1163
Assumes a gobject.MainLoop event loop.
1164
"""
1165
def __init__(self, server_address, RequestHandlerClass,
1166
interface=None, use_ipv6=True, clients=None,
1167
gnutls_priority=None, use_dbus=True):
1168
self.enabled = False
1169
self.clients = clients
1170
if self.clients is None:
1171
self.clients = set()
1172
self.use_dbus = use_dbus
1173
self.gnutls_priority = gnutls_priority
1174
IPv6_TCPServer.__init__(self, server_address,
1175
RequestHandlerClass,
1176
interface = interface,
1177
use_ipv6 = use_ipv6)
568
# (self.settings
569
# ["interface"]))
570
return super(IPv6_TCPServer, self).server_bind()
1178
571
def server_activate(self):
1179
572
if self.enabled:
1180
return socketserver.TCPServer.server_activate(self)
573
return super(IPv6_TCPServer, self).server_activate()
1181
574
def enable(self):
1182
575
self.enabled = True
1183
def add_pipe(self, pipe):
1184
# Call "handle_ipc" for both data and EOF events
1185
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1186
self.handle_ipc)
1187
def handle_ipc(self, source, condition, file_objects={}):
1188
condition_names = {
1189
gobject.IO_IN: u"IN", # There is data to read.
1190
gobject.IO_OUT: u"OUT", # Data can be written (without
1191
# blocking).
1192
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1193
gobject.IO_ERR: u"ERR", # Error condition.
1194
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1195
# broken, usually for pipes and
1196
# sockets).
1197
}
1198
conditions_string = ' | '.join(name
1199
for cond, name in
1200
condition_names.iteritems()
1201
if cond & condition)
1202
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1203
conditions_string)
1204
1205
# Turn the pipe file descriptor into a Python file object
1206
if source not in file_objects:
1207
file_objects[source] = os.fdopen(source, u"r", 1)
1208
1209
# Read a line from the file object
1210
cmdline = file_objects[source].readline()
1211
if not cmdline: # Empty line means end of file
1212
# close the IPC pipe
1213
file_objects[source].close()
1214
del file_objects[source]
1215
1216
# Stop calling this function
1217
return False
1218
1219
logger.debug(u"IPC command: %r", cmdline)
1220
1221
# Parse and act on command
1222
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1223
1224
if cmd == u"NOTFOUND":
1225
logger.warning(u"Client not found for fingerprint: %s",
1226
args)
1227
if self.use_dbus:
1228
# Emit D-Bus signal
1229
mandos_dbus_service.ClientNotFound(args)
1230
elif cmd == u"INVALID":
1231
for client in self.clients:
1232
if client.name == args:
1233
logger.warning(u"Client %s is invalid", args)
1234
if self.use_dbus:
1235
# Emit D-Bus signal
1236
client.Rejected()
1237
break
1238
else:
1239
logger.error(u"Unknown client %s is invalid", args)
1240
elif cmd == u"SENDING":
1241
for client in self.clients:
1242
if client.name == args:
1243
logger.info(u"Sending secret to %s", client.name)
1244
client.checked_ok()
1245
if self.use_dbus:
1246
# Emit D-Bus signal
1247
client.ReceivedSecret()
1248
break
1249
else:
1250
logger.error(u"Sending secret to unknown client %s",
1251
args)
1252
else:
1253
logger.error(u"Unknown IPC command: %r", cmdline)
1254
1255
# Keep calling this function
1256
return True
1257
576
1258
577
1259
578
def string_to_delta(interval):
1260
579
"""Parse a string and return a datetime.timedelta
1261
1262
>>> string_to_delta(u'7d')
580
581
>>> string_to_delta('7d')
1263
582
datetime.timedelta(7)
1264
>>> string_to_delta(u'60s')
583
>>> string_to_delta('60s')
1265
584
datetime.timedelta(0, 60)
1266
>>> string_to_delta(u'60m')
585
>>> string_to_delta('60m')
1267
586
datetime.timedelta(0, 3600)
1268
>>> string_to_delta(u'24h')
587
>>> string_to_delta('24h')
1269
588
datetime.timedelta(1)
1270
589
>>> string_to_delta(u'1w')
1271
590
datetime.timedelta(7)
1272
>>> string_to_delta(u'5m 30s')
591
>>> string_to_delta('5m 30s')
1273
592
datetime.timedelta(0, 330)
1274
593
"""
1275
594
timevalue = datetime.timedelta(0)
1295
614
return timevalue
1296
615
1297
616
617
def server_state_changed(state):
618
"""Derived from the Avahi example code"""
619
if state == avahi.SERVER_COLLISION:
620
logger.error(u"Zeroconf server name collision")
621
service.remove()
622
elif state == avahi.SERVER_RUNNING:
623
service.add()
624
625
626
def entry_group_state_changed(state, error):
627
"""Derived from the Avahi example code"""
628
logger.debug(u"Avahi state change: %i", state)
629
630
if state == avahi.ENTRY_GROUP_ESTABLISHED:
631
logger.debug(u"Zeroconf service established.")
632
elif state == avahi.ENTRY_GROUP_COLLISION:
633
logger.warning(u"Zeroconf service name collision.")
634
service.rename()
635
elif state == avahi.ENTRY_GROUP_FAILURE:
636
logger.critical(u"Avahi: Error in group state changed %s",
637
unicode(error))
638
raise AvahiGroupError("State changed: %s", str(error))
639
1298
640
def if_nametoindex(interface):
1299
"""Call the C function if_nametoindex(), or equivalent
1300
1301
Note: This function cannot accept a unicode string."""
641
"""Call the C function if_nametoindex(), or equivalent"""
1302
642
global if_nametoindex
1303
643
try:
1304
if_nametoindex = (ctypes.cdll.LoadLibrary
1305
(ctypes.util.find_library(u"c"))
1306
.if_nametoindex)
644
if_nametoindex = ctypes.cdll.LoadLibrary\
645
(ctypes.util.find_library("c")).if_nametoindex
1307
646
except (OSError, AttributeError):
1308
logger.warning(u"Doing if_nametoindex the hard way")
647
if "struct" not in sys.modules:
648
import struct
649
if "fcntl" not in sys.modules:
650
import fcntl
1309
651
def if_nametoindex(interface):
1310
652
"Get an interface index the hard way, i.e. using fcntl()"
1311
653
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1312
with closing(socket.socket()) as s:
1313
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1314
struct.pack(str(u"16s16x"),
1315
interface))
1316
interface_index = struct.unpack(str(u"I"),
1317
ifreq[16:20])[0]
654
s = socket.socket()
655
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
656
struct.pack("16s16x", interface))
657
s.close()
658
interface_index = struct.unpack("I", ifreq[16:20])[0]
1318
659
return interface_index
1319
660
return if_nametoindex(interface)
1320
661
1321
662
1322
663
def daemon(nochdir = False, noclose = False):
1323
664
"""See daemon(3). Standard BSD Unix function.
1324
1325
665
This should really exist as os.daemon, but it doesn't (yet)."""
1326
666
if os.fork():
1327
667
sys.exit()
1328
668
os.setsid()
1329
669
if not nochdir:
1330
os.chdir(u"/")
670
os.chdir("/")
1331
671
if os.fork():
1332
672
sys.exit()
1333
673
if not noclose:
1335
675
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1336
676
if not stat.S_ISCHR(os.fstat(null).st_mode):
1337
677
raise OSError(errno.ENODEV,
1338
u"/dev/null not a character device")
678
"/dev/null not a character device")
1339
679
os.dup2(null, sys.stdin.fileno())
1340
680
os.dup2(null, sys.stdout.fileno())
1341
681
os.dup2(null, sys.stderr.fileno())
1344
684
1345
685
1346
686
def main():
1347
1348
##################################################################
1349
# Parsing of options, both command line and config file
1350
1351
parser = optparse.OptionParser(version = "%%prog %s" % version)
1352
parser.add_option("-i", u"--interface", type=u"string",
1353
metavar="IF", help=u"Bind to interface IF")
1354
parser.add_option("-a", u"--address", type=u"string",
1355
help=u"Address to listen for requests on")
1356
parser.add_option("-p", u"--port", type=u"int",
1357
help=u"Port number to receive requests on")
1358
parser.add_option("--check", action=u"store_true",
1359
help=u"Run self-test")
1360
parser.add_option("--debug", action=u"store_true",
1361
help=u"Debug mode; run in foreground and log to"
1362
u" terminal")
1363
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1364
u" priority string (see GnuTLS documentation)")
1365
parser.add_option("--servicename", type=u"string",
1366
metavar=u"NAME", help=u"Zeroconf service name")
1367
parser.add_option("--configdir", type=u"string",
1368
default=u"/etc/mandos", metavar=u"DIR",
1369
help=u"Directory to search for configuration"
1370
u" files")
1371
parser.add_option("--no-dbus", action=u"store_false",
1372
dest=u"use_dbus", help=u"Do not provide D-Bus"
1373
u" system bus interface")
1374
parser.add_option("--no-ipv6", action=u"store_false",
1375
dest=u"use_ipv6", help=u"Do not use IPv6")
687
parser = OptionParser(version = "%%prog %s" % version)
688
parser.add_option("-i", "--interface", type="string",
689
metavar="IF", help="Bind to interface IF")
690
parser.add_option("-a", "--address", type="string",
691
help="Address to listen for requests on")
692
parser.add_option("-p", "--port", type="int",
693
help="Port number to receive requests on")
694
parser.add_option("--check", action="store_true", default=False,
695
help="Run self-test")
696
parser.add_option("--debug", action="store_true",
697
help="Debug mode; run in foreground and log to"
698
" terminal")
699
parser.add_option("--priority", type="string", help="GnuTLS"
700
" priority string (see GnuTLS documentation)")
701
parser.add_option("--servicename", type="string", metavar="NAME",
702
help="Zeroconf service name")
703
parser.add_option("--configdir", type="string",
704
default="/etc/mandos", metavar="DIR",
705
help="Directory to search for configuration"
706
" files")
1376
707
options = parser.parse_args()[0]
1377
708
1378
709
if options.check:
1381
712
sys.exit()
1382
713
1383
714
# Default values for config file for server-global settings
1384
server_defaults = { u"interface": u"",
1385
u"address": u"",
1386
u"port": u"",
1387
u"debug": u"False",
1388
u"priority":
1389
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1390
u"servicename": u"Mandos",
1391
u"use_dbus": u"True",
1392
u"use_ipv6": u"True",
715
server_defaults = { "interface": "",
716
"address": "",
717
"port": "",
718
"debug": "False",
719
"priority":
720
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
721
"servicename": "Mandos",
1393
722
}
1394
723
1395
724
# Parse config file for server-global settings
1396
server_config = configparser.SafeConfigParser(server_defaults)
725
server_config = ConfigParser.SafeConfigParser(server_defaults)
1397
726
del server_defaults
1398
server_config.read(os.path.join(options.configdir,
1399
u"mandos.conf"))
727
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1400
728
# Convert the SafeConfigParser object to a dict
1401
729
server_settings = server_config.defaults()
1402
# Use the appropriate methods on the non-string config options
1403
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1404
server_settings[option] = server_config.getboolean(u"DEFAULT",
1405
option)
1406
if server_settings["port"]:
1407
server_settings["port"] = server_config.getint(u"DEFAULT",
1408
u"port")
730
# Use getboolean on the boolean config option
731
server_settings["debug"] = server_config.getboolean\
732
("DEFAULT", "debug")
1409
733
del server_config
1410
734
1411
735
# Override the settings from the config file with command line
1412
736
# options, if set.
1413
for option in (u"interface", u"address", u"port", u"debug",
1414
u"priority", u"servicename", u"configdir",
1415
u"use_dbus", u"use_ipv6"):
737
for option in ("interface", "address", "port", "debug",
738
"priority", "servicename", "configdir"):
1416
739
value = getattr(options, option)
1417
740
if value is not None:
1418
741
server_settings[option] = value
1419
742
del options
1420
# Force all strings to be unicode
1421
for option in server_settings.keys():
1422
if type(server_settings[option]) is str:
1423
server_settings[option] = unicode(server_settings[option])
1424
743
# Now we have our good server settings in "server_settings"
1425
744
1426
##################################################################
1427
1428
# For convenience
1429
debug = server_settings[u"debug"]
1430
use_dbus = server_settings[u"use_dbus"]
1431
use_ipv6 = server_settings[u"use_ipv6"]
745
debug = server_settings["debug"]
1432
746
1433
747
if not debug:
1434
748
syslogger.setLevel(logging.WARNING)
1435
749
console.setLevel(logging.WARNING)
1436
750
1437
if server_settings[u"servicename"] != u"Mandos":
1438
syslogger.setFormatter(logging.Formatter
1439
(u'Mandos (%s) [%%(process)d]:'
1440
u' %%(levelname)s: %%(message)s'
1441
% server_settings[u"servicename"]))
751
if server_settings["servicename"] != "Mandos":
752
syslogger.setFormatter(logging.Formatter\
753
('Mandos (%s): %%(levelname)s:'
754
' %%(message)s'
755
% server_settings["servicename"]))
1442
756
1443
757
# Parse config file with clients
1444
client_defaults = { u"timeout": u"1h",
1445
u"interval": u"5m",
1446
u"checker": u"fping -q -- %%(host)s",
1447
u"host": u"",
758
client_defaults = { "timeout": "1h",
759
"interval": "5m",
760
"checker": "fping -q -- %(host)s",
761
"host": "",
1448
762
}
1449
client_config = configparser.SafeConfigParser(client_defaults)
1450
client_config.read(os.path.join(server_settings[u"configdir"],
1451
u"clients.conf"))
1452
1453
global mandos_dbus_service
1454
mandos_dbus_service = None
1455
1456
tcp_server = MandosServer((server_settings[u"address"],
1457
server_settings[u"port"]),
1458
ClientHandler,
1459
interface=server_settings[u"interface"],
1460
use_ipv6=use_ipv6,
1461
gnutls_priority=
1462
server_settings[u"priority"],
1463
use_dbus=use_dbus)
1464
pidfilename = u"/var/run/mandos.pid"
1465
try:
1466
pidfile = open(pidfilename, u"w")
1467
except IOError:
1468
logger.error(u"Could not open file %r", pidfilename)
1469
1470
try:
1471
uid = pwd.getpwnam(u"_mandos").pw_uid
1472
gid = pwd.getpwnam(u"_mandos").pw_gid
1473
except KeyError:
1474
try:
1475
uid = pwd.getpwnam(u"mandos").pw_uid
1476
gid = pwd.getpwnam(u"mandos").pw_gid
1477
except KeyError:
1478
try:
1479
uid = pwd.getpwnam(u"nobody").pw_uid
1480
gid = pwd.getpwnam(u"nobody").pw_gid
1481
except KeyError:
1482
uid = 65534
1483
gid = 65534
1484
try:
763
client_config = ConfigParser.SafeConfigParser(client_defaults)
764
client_config.read(os.path.join(server_settings["configdir"],
765
"clients.conf"))
766
767
clients = Set()
768
tcp_server = IPv6_TCPServer((server_settings["address"],
769
server_settings["port"]),
770
TCP_handler,
771
settings=server_settings,
772
clients=clients)
773
pidfilename = "/var/run/mandos.pid"
774
try:
775
pidfile = open(pidfilename, "w")
776
except IOError, error:
777
logger.error("Could not open file %r", pidfilename)
778
779
uid = 65534
780
gid = 65534
781
try:
782
uid = pwd.getpwnam("mandos").pw_uid
783
except KeyError:
784
try:
785
uid = pwd.getpwnam("nobody").pw_uid
786
except KeyError:
787
pass
788
try:
789
gid = pwd.getpwnam("mandos").pw_gid
790
except KeyError:
791
try:
792
gid = pwd.getpwnam("nogroup").pw_gid
793
except KeyError:
794
pass
795
try:
796
os.setuid(uid)
1485
797
os.setgid(gid)
1486
os.setuid(uid)
1487
798
except OSError, error:
1488
799
if error[0] != errno.EPERM:
1489
800
raise error
1490
801
1491
# Enable all possible GnuTLS debugging
1492
if debug:
1493
# "Use a log level over 10 to enable all debugging options."
1494
# - GnuTLS manual
1495
gnutls.library.functions.gnutls_global_set_log_level(11)
1496
1497
@gnutls.library.types.gnutls_log_func
1498
def debug_gnutls(level, string):
1499
logger.debug(u"GnuTLS: %s", string[:-1])
1500
1501
(gnutls.library.functions
1502
.gnutls_global_set_log_function(debug_gnutls))
802
global service
803
service = AvahiService(name = server_settings["servicename"],
804
servicetype = "_mandos._tcp", )
805
if server_settings["interface"]:
806
service.interface = if_nametoindex\
807
(server_settings["interface"])
1503
808
1504
809
global main_loop
810
global bus
811
global server
1505
812
# From the Avahi example code
1506
813
DBusGMainLoop(set_as_default=True )
1507
814
main_loop = gobject.MainLoop()
1508
815
bus = dbus.SystemBus()
816
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
817
avahi.DBUS_PATH_SERVER),
818
avahi.DBUS_INTERFACE_SERVER)
1509
819
# End of Avahi example code
1510
if use_dbus:
1511
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1512
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1513
service = AvahiService(name = server_settings[u"servicename"],
1514
servicetype = u"_mandos._tcp",
1515
protocol = protocol, bus = bus)
1516
if server_settings["interface"]:
1517
service.interface = (if_nametoindex
1518
(str(server_settings[u"interface"])))
1519
1520
client_class = Client
1521
if use_dbus:
1522
client_class = functools.partial(ClientDBus, bus = bus)
1523
tcp_server.clients.update(set(
1524
client_class(name = section,
1525
config= dict(client_config.items(section)))
1526
for section in client_config.sections()))
1527
if not tcp_server.clients:
1528
logger.warning(u"No clients defined")
820
821
def remove_from_clients(client):
822
clients.remove(client)
823
if not clients:
824
logger.critical(u"No clients left, exiting")
825
sys.exit()
826
827
clients.update(Set(Client(name = section,
828
stop_hook = remove_from_clients,
829
config
830
= dict(client_config.items(section)))
831
for section in client_config.sections()))
832
if not clients:
833
logger.critical(u"No clients defined")
834
sys.exit(1)
1529
835
1530
836
if debug:
1531
837
# Redirect stdin so all checkers get /dev/null
1540
846
daemon()
1541
847
1542
848
try:
1543
with closing(pidfile):
1544
pid = os.getpid()
1545
pidfile.write(str(pid) + "\n")
849
pid = os.getpid()
850
pidfile.write(str(pid) + "\n")
851
pidfile.close()
1546
852
del pidfile
1547
853
except IOError:
1548
854
logger.error(u"Could not write to file %r with PID %d",
1554
860
1555
861
def cleanup():
1556
862
"Cleanup function; run on exit"
1557
service.cleanup()
863
global group
864
# From the Avahi example code
865
if not group is None:
866
group.Free()
867
group = None
868
# End of Avahi example code
1558
869
1559
while tcp_server.clients:
1560
client = tcp_server.clients.pop()
1561
client.disable_hook = None
1562
client.disable()
870
while clients:
871
client = clients.pop()
872
client.stop_hook = None
873
client.stop()
1563
874
1564
875
atexit.register(cleanup)
1565
876
1568
879
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1569
880
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1570
881
1571
if use_dbus:
1572
class MandosDBusService(dbus.service.Object):
1573
"""A D-Bus proxy object"""
1574
def __init__(self):
1575
dbus.service.Object.__init__(self, bus, u"/")
1576
_interface = u"se.bsnet.fukt.Mandos"
1577
1578
@dbus.service.signal(_interface, signature=u"oa{sv}")
1579
def ClientAdded(self, objpath, properties):
1580
"D-Bus signal"
1581
pass
1582
1583
@dbus.service.signal(_interface, signature=u"s")
1584
def ClientNotFound(self, fingerprint):
1585
"D-Bus signal"
1586
pass
1587
1588
@dbus.service.signal(_interface, signature=u"os")
1589
def ClientRemoved(self, objpath, name):
1590
"D-Bus signal"
1591
pass
1592
1593
@dbus.service.method(_interface, out_signature=u"ao")
1594
def GetAllClients(self):
1595
"D-Bus method"
1596
return dbus.Array(c.dbus_object_path
1597
for c in tcp_server.clients)
1598
1599
@dbus.service.method(_interface,
1600
out_signature=u"a{oa{sv}}")
1601
def GetAllClientsWithProperties(self):
1602
"D-Bus method"
1603
return dbus.Dictionary(
1604
((c.dbus_object_path, c.GetAll(u""))
1605
for c in tcp_server.clients),
1606
signature=u"oa{sv}")
1607
1608
@dbus.service.method(_interface, in_signature=u"o")
1609
def RemoveClient(self, object_path):
1610
"D-Bus method"
1611
for c in tcp_server.clients:
1612
if c.dbus_object_path == object_path:
1613
tcp_server.clients.remove(c)
1614
c.remove_from_connection()
1615
# Don't signal anything except ClientRemoved
1616
c.disable(signal=False)
1617
# Emit D-Bus signal
1618
self.ClientRemoved(object_path, c.name)
1619
return
1620
raise KeyError
1621
1622
del _interface
1623
1624
mandos_dbus_service = MandosDBusService()
1625
1626
for client in tcp_server.clients:
1627
if use_dbus:
1628
# Emit D-Bus signal
1629
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1630
client.GetAll(u""))
1631
client.enable()
882
for client in clients:
883
client.start()
1632
884
1633
885
tcp_server.enable()
1634
886
tcp_server.server_activate()
1635
887
1636
888
# Find out what port we got
1637
889
service.port = tcp_server.socket.getsockname()[1]
1638
if use_ipv6:
1639
logger.info(u"Now listening on address %r, port %d,"
1640
" flowinfo %d, scope_id %d"
1641
% tcp_server.socket.getsockname())
1642
else: # IPv4
1643
logger.info(u"Now listening on address %r, port %d"
1644
% tcp_server.socket.getsockname())
890
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
891
u" scope_id %d" % tcp_server.socket.getsockname())
1645
892
1646
893
#service.interface = tcp_server.socket.getsockname()[3]
1647
894
1648
895
try:
1649
896
# From the Avahi example code
897
server.connect_to_signal("StateChanged", server_state_changed)
1650
898
try:
1651
service.activate()
899
server_state_changed(server.GetState())
1652
900
except dbus.exceptions.DBusException, error:
1653
901
logger.critical(u"DBusException: %s", error)
1654
902
sys.exit(1)
1656
904
1657
905
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1658
906
lambda *args, **kwargs:
1659
(tcp_server.handle_request
1660
(*args[2:], **kwargs) or True))
907
tcp_server.handle_request\
908
(*args[2:], **kwargs) or True)
1661
909
1662
910
logger.debug(u"Starting main loop")
1663
911
main_loop.run()
1664
912
except AvahiError, error:
1665
logger.critical(u"AvahiError: %s", error)
913
logger.critical(u"AvahiError: %s" + unicode(error))
1666
914
sys.exit(1)
1667
915
except KeyboardInterrupt:
1668
916
if debug:
1669
print >> sys.stderr
1670
logger.debug(u"Server received KeyboardInterrupt")
1671
logger.debug(u"Server exiting")
917
print
1672
918
1673
919
if __name__ == '__main__':
1674
920
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0