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- Committer: Teddy Hogeborn
- Date: 2008-08-27 01:18:25 UTC
- Revision ID: teddy@fukt.bsnet.se-20080827011825-ka3ni6xvy2ehi1y8
* .bzrignore: New.
* clients.conf ([foo]): Remove Radix-64 checksum.
* mandos (AvahiService.rename, server_state_changed,
entry_group_state_changed): Make Avahi log messages more
clear that they are about
Zeroconf.
(fingerprint): Use plain "0" instead of "ctypes.c_uint(0)".
* clients.conf ([foo]): Remove Radix-64 checksum.
* mandos (AvahiService.rename, server_state_changed,
entry_group_state_changed): Make Avahi log messages more
clear that they are about
Zeroconf.
(fingerprint): Use plain "0" instead of "ctypes.c_uint(0)".
- files added:
- plugins.d/usplash
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- 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".
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12
#
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# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
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# Copyright © 2008,2009 Björn Påhlsson
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# Copyright © 2007-2008 Teddy Hogeborn & 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>.
32
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#
33
32
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from __future__ import division, with_statement, absolute_import
33
from __future__ import division
35
34
36
import SocketServer as socketserver
35
import SocketServer
37
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import socket
38
import optparse
37
import select
38
from optparse import OptionParser
39
39
import datetime
40
40
import errno
41
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import gnutls.crypto
44
44
import gnutls.library.functions
45
45
import gnutls.library.constants
46
46
import gnutls.library.types
47
import ConfigParser as configparser
47
import ConfigParser
48
48
import sys
49
49
import re
50
50
import os
51
51
import signal
52
from sets import Set
52
53
import subprocess
53
54
import atexit
54
55
import stat
55
56
import logging
56
57
import logging.handlers
57
import pwd
58
import contextlib
59
import struct
60
import fcntl
61
import functools
62
import cPickle as pickle
63
import select
64
58
65
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import dbus
66
import dbus.service
67
60
import gobject
68
61
import avahi
69
62
from dbus.mainloop.glib import DBusGMainLoop
70
63
import ctypes
71
import ctypes.util
72
import xml.dom.minidom
73
import inspect
74
75
try:
76
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
77
except AttributeError:
78
try:
79
from IN import SO_BINDTODEVICE
80
except ImportError:
81
SO_BINDTODEVICE = None
82
83
84
version = "1.0.14"
85
86
logger = logging.Logger(u'mandos')
87
syslogger = (logging.handlers.SysLogHandler
88
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
89
address = "/dev/log"))
90
syslogger.setFormatter(logging.Formatter
91
(u'Mandos [%(process)d]: %(levelname)s:'
92
u' %(message)s'))
64
65
version = "1.0"
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67
logger = logging.Logger('mandos')
68
syslogger = logging.handlers.SysLogHandler\
69
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
70
address = "/dev/log")
71
syslogger.setFormatter(logging.Formatter\
72
('Mandos: %(levelname)s: %(message)s'))
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logger.addHandler(syslogger)
94
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console = logging.StreamHandler()
96
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
97
u' %(levelname)s:'
98
u' %(message)s'))
76
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
77
' %(message)s'))
99
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logger.addHandler(console)
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101
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class AvahiError(Exception):
102
def __init__(self, value, *args, **kwargs):
81
def __init__(self, value):
103
82
self.value = value
104
super(AvahiError, self).__init__(value, *args, **kwargs)
105
def __unicode__(self):
106
return unicode(repr(self.value))
83
def __str__(self):
84
return repr(self.value)
107
85
108
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class AvahiServiceError(AvahiError):
109
87
pass
114
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115
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class AvahiService(object):
116
94
"""An Avahi (Zeroconf) service.
117
118
95
Attributes:
119
96
interface: integer; avahi.IF_UNSPEC or an interface index.
120
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Used to optionally bind to the specified interface.
121
name: string; Example: u'Mandos'
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type: string; Example: u'_mandos._tcp'.
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name: string; Example: 'Mandos'
99
type: string; Example: '_mandos._tcp'.
123
100
See <http://www.dns-sd.org/ServiceTypes.html>
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port: integer; what port to announce
125
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TXT: list of strings; TXT record for the service
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105
max_renames: integer; maximum number of renames
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rename_count: integer; counter so we only rename after collisions
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a sensible number of times
131
group: D-Bus Entry Group
132
server: D-Bus Server
133
bus: dbus.SystemBus()
134
108
"""
135
109
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
136
servicetype = None, port = None, TXT = None,
137
domain = u"", host = u"", max_renames = 32768,
138
protocol = avahi.PROTO_UNSPEC, bus = None):
110
type = None, port = None, TXT = None, domain = "",
111
host = "", max_renames = 32768):
139
112
self.interface = interface
140
113
self.name = name
141
self.type = servicetype
114
self.type = type
142
115
self.port = port
143
self.TXT = TXT if TXT is not None else []
116
if TXT is None:
117
self.TXT = []
118
else:
119
self.TXT = TXT
144
120
self.domain = domain
145
121
self.host = host
146
122
self.rename_count = 0
147
123
self.max_renames = max_renames
148
self.protocol = protocol
149
self.group = None # our entry group
150
self.server = None
151
self.bus = bus
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124
def rename(self):
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"""Derived from the Avahi example code"""
154
126
if self.rename_count >= self.max_renames:
155
127
logger.critical(u"No suitable Zeroconf service name found"
156
128
u" after %i retries, exiting.",
157
self.rename_count)
158
raise AvahiServiceError(u"Too many renames")
159
self.name = self.server.GetAlternativeServiceName(self.name)
129
rename_count)
130
raise AvahiServiceError("Too many renames")
131
self.name = server.GetAlternativeServiceName(self.name)
160
132
logger.info(u"Changing Zeroconf service name to %r ...",
161
unicode(self.name))
162
syslogger.setFormatter(logging.Formatter
163
(u'Mandos (%s) [%%(process)d]:'
164
u' %%(levelname)s: %%(message)s'
165
% self.name))
133
str(self.name))
134
syslogger.setFormatter(logging.Formatter\
135
('Mandos (%s): %%(levelname)s:'
136
' %%(message)s' % self.name))
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137
self.remove()
167
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self.add()
168
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self.rename_count += 1
169
140
def remove(self):
170
141
"""Derived from the Avahi example code"""
171
if self.group is not None:
172
self.group.Reset()
142
if group is not None:
143
group.Reset()
173
144
def add(self):
174
145
"""Derived from the Avahi example code"""
175
if self.group is None:
176
self.group = dbus.Interface(
177
self.bus.get_object(avahi.DBUS_NAME,
178
self.server.EntryGroupNew()),
179
avahi.DBUS_INTERFACE_ENTRY_GROUP)
180
self.group.connect_to_signal('StateChanged',
181
self
182
.entry_group_state_changed)
146
global group
147
if group is None:
148
group = dbus.Interface\
149
(bus.get_object(avahi.DBUS_NAME,
150
server.EntryGroupNew()),
151
avahi.DBUS_INTERFACE_ENTRY_GROUP)
152
group.connect_to_signal('StateChanged',
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entry_group_state_changed)
183
154
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
184
self.name, self.type)
185
self.group.AddService(
186
self.interface,
187
self.protocol,
188
dbus.UInt32(0), # flags
189
self.name, self.type,
190
self.domain, self.host,
191
dbus.UInt16(self.port),
192
avahi.string_array_to_txt_array(self.TXT))
193
self.group.Commit()
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def entry_group_state_changed(self, state, error):
195
"""Derived from the Avahi example code"""
196
logger.debug(u"Avahi entry group state change: %i", state)
197
198
if state == avahi.ENTRY_GROUP_ESTABLISHED:
199
logger.debug(u"Zeroconf service established.")
200
elif state == avahi.ENTRY_GROUP_COLLISION:
201
logger.warning(u"Zeroconf service name collision.")
202
self.rename()
203
elif state == avahi.ENTRY_GROUP_FAILURE:
204
logger.critical(u"Avahi: Error in group state changed %s",
205
unicode(error))
206
raise AvahiGroupError(u"State changed: %s"
207
% unicode(error))
208
def cleanup(self):
209
"""Derived from the Avahi example code"""
210
if self.group is not None:
211
self.group.Free()
212
self.group = None
213
def server_state_changed(self, state):
214
"""Derived from the Avahi example code"""
215
logger.debug(u"Avahi server state change: %i", state)
216
if state == avahi.SERVER_COLLISION:
217
logger.error(u"Zeroconf server name collision")
218
self.remove()
219
elif state == avahi.SERVER_RUNNING:
220
self.add()
221
def activate(self):
222
"""Derived from the Avahi example code"""
223
if self.server is None:
224
self.server = dbus.Interface(
225
self.bus.get_object(avahi.DBUS_NAME,
226
avahi.DBUS_PATH_SERVER),
227
avahi.DBUS_INTERFACE_SERVER)
228
self.server.connect_to_signal(u"StateChanged",
229
self.server_state_changed)
230
self.server_state_changed(self.server.GetState())
155
service.name, service.type)
156
group.AddService(
157
self.interface, # interface
158
avahi.PROTO_INET6, # protocol
159
dbus.UInt32(0), # flags
160
self.name, self.type,
161
self.domain, self.host,
162
dbus.UInt16(self.port),
163
avahi.string_array_to_txt_array(self.TXT))
164
group.Commit()
165
166
# From the Avahi example code:
167
group = None # our entry group
168
# End of Avahi example code
231
169
232
170
233
171
class Client(object):
234
172
"""A representation of a client host served by this server.
235
236
173
Attributes:
237
name: string; from the config file, used in log messages and
238
D-Bus identifiers
174
name: string; from the config file, used in log messages
239
175
fingerprint: string (40 or 32 hexadecimal digits); used to
240
176
uniquely identify the client
241
secret: bytestring; sent verbatim (over TLS) to client
242
host: string; available for use by the checker command
243
created: datetime.datetime(); (UTC) object creation
244
last_enabled: datetime.datetime(); (UTC)
245
enabled: bool()
246
last_checked_ok: datetime.datetime(); (UTC) or None
247
timeout: datetime.timedelta(); How long from last_checked_ok
248
until this client is disabled
249
interval: datetime.timedelta(); How often to start a new checker
250
disable_hook: If set, called by disable() as disable_hook(self)
251
checker: subprocess.Popen(); a running checker process used
252
to see if the client lives.
253
'None' if no process is running.
177
secret: bytestring; sent verbatim (over TLS) to client
178
host: string; available for use by the checker command
179
created: datetime.datetime(); object creation, not client host
180
last_checked_ok: datetime.datetime() or None if not yet checked OK
181
timeout: datetime.timedelta(); How long from last_checked_ok
182
until this client is invalid
183
interval: datetime.timedelta(); How often to start a new checker
184
stop_hook: If set, called by stop() as stop_hook(self)
185
checker: subprocess.Popen(); a running checker process used
186
to see if the client lives.
187
'None' if no process is running.
254
188
checker_initiator_tag: a gobject event source tag, or None
255
disable_initiator_tag: - '' -
189
stop_initiator_tag: - '' -
256
190
checker_callback_tag: - '' -
257
191
checker_command: string; External command which is run to check if
258
192
client lives. %() expansions are done at
259
193
runtime with vars(self) as dict, so that for
260
194
instance %(name)s can be used in the command.
261
current_checker_command: string; current running checker_command
195
Private attibutes:
196
_timeout: Real variable for 'timeout'
197
_interval: Real variable for 'interval'
198
_timeout_milliseconds: Used when calling gobject.timeout_add()
199
_interval_milliseconds: - '' -
262
200
"""
263
264
@staticmethod
265
def _timedelta_to_milliseconds(td):
266
"Convert a datetime.timedelta() to milliseconds"
267
return ((td.days * 24 * 60 * 60 * 1000)
268
+ (td.seconds * 1000)
269
+ (td.microseconds // 1000))
270
271
def timeout_milliseconds(self):
272
"Return the 'timeout' attribute in milliseconds"
273
return self._timedelta_to_milliseconds(self.timeout)
274
275
def interval_milliseconds(self):
276
"Return the 'interval' attribute in milliseconds"
277
return self._timedelta_to_milliseconds(self.interval)
278
279
def __init__(self, name = None, disable_hook=None, config=None):
201
def _set_timeout(self, timeout):
202
"Setter function for 'timeout' attribute"
203
self._timeout = timeout
204
self._timeout_milliseconds = ((self.timeout.days
205
* 24 * 60 * 60 * 1000)
206
+ (self.timeout.seconds * 1000)
207
+ (self.timeout.microseconds
208
// 1000))
209
timeout = property(lambda self: self._timeout,
210
_set_timeout)
211
del _set_timeout
212
def _set_interval(self, interval):
213
"Setter function for 'interval' attribute"
214
self._interval = interval
215
self._interval_milliseconds = ((self.interval.days
216
* 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds
218
* 1000)
219
+ (self.interval.microseconds
220
// 1000))
221
interval = property(lambda self: self._interval,
222
_set_interval)
223
del _set_interval
224
def __init__(self, name = None, stop_hook=None, config={}):
280
225
"""Note: the 'checker' key in 'config' sets the
281
226
'checker_command' attribute and *not* the 'checker'
282
227
attribute."""
283
228
self.name = name
284
if config is None:
285
config = {}
286
229
logger.debug(u"Creating client %r", self.name)
287
230
# Uppercase and remove spaces from fingerprint for later
288
231
# comparison purposes with return value from the fingerprint()
289
232
# function
290
self.fingerprint = (config[u"fingerprint"].upper()
291
.replace(u" ", u""))
233
self.fingerprint = config["fingerprint"].upper()\
234
.replace(u" ", u"")
292
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
293
if u"secret" in config:
294
self.secret = config[u"secret"].decode(u"base64")
295
elif u"secfile" in config:
296
with open(os.path.expanduser(os.path.expandvars
297
(config[u"secfile"])),
298
"rb") as secfile:
299
self.secret = secfile.read()
236
if "secret" in config:
237
self.secret = config["secret"].decode(u"base64")
238
elif "secfile" in config:
239
sf = open(config["secfile"])
240
self.secret = sf.read()
241
sf.close()
300
242
else:
301
243
raise TypeError(u"No secret or secfile for client %s"
302
244
% self.name)
303
self.host = config.get(u"host", u"")
304
self.created = datetime.datetime.utcnow()
305
self.enabled = False
306
self.last_enabled = None
245
self.host = config.get("host", "")
246
self.created = datetime.datetime.now()
307
247
self.last_checked_ok = None
308
self.timeout = string_to_delta(config[u"timeout"])
309
self.interval = string_to_delta(config[u"interval"])
310
self.disable_hook = disable_hook
248
self.timeout = string_to_delta(config["timeout"])
249
self.interval = string_to_delta(config["interval"])
250
self.stop_hook = stop_hook
311
251
self.checker = None
312
252
self.checker_initiator_tag = None
313
self.disable_initiator_tag = None
253
self.stop_initiator_tag = None
314
254
self.checker_callback_tag = None
315
self.checker_command = config[u"checker"]
316
self.current_checker_command = None
317
self.last_connect = None
318
319
def enable(self):
255
self.check_command = config["checker"]
256
def start(self):
320
257
"""Start this client's checker and timeout hooks"""
321
if getattr(self, u"enabled", False):
322
# Already enabled
323
return
324
self.last_enabled = datetime.datetime.utcnow()
325
258
# Schedule a new checker to be started an 'interval' from now,
326
259
# and every interval from then on.
327
self.checker_initiator_tag = (gobject.timeout_add
328
(self.interval_milliseconds(),
329
self.start_checker))
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
260
self.checker_initiator_tag = gobject.timeout_add\
261
(self._interval_milliseconds,
262
self.start_checker)
335
263
# Also start a new checker *right now*.
336
264
self.start_checker()
337
338
def disable(self, quiet=True):
339
"""Disable this client."""
340
if not getattr(self, "enabled", False):
265
# Schedule a stop() when 'timeout' has passed
266
self.stop_initiator_tag = gobject.timeout_add\
267
(self._timeout_milliseconds,
268
self.stop)
269
def stop(self):
270
"""Stop this client.
271
The possibility that a client might be restarted is left open,
272
but not currently used."""
273
# If this client doesn't have a secret, it is already stopped.
274
if hasattr(self, "secret") and self.secret:
275
logger.info(u"Stopping client %s", self.name)
276
self.secret = None
277
else:
341
278
return False
342
if not quiet:
343
logger.info(u"Disabling client %s", self.name)
344
if getattr(self, u"disable_initiator_tag", False):
345
gobject.source_remove(self.disable_initiator_tag)
346
self.disable_initiator_tag = None
347
if getattr(self, u"checker_initiator_tag", False):
279
if getattr(self, "stop_initiator_tag", False):
280
gobject.source_remove(self.stop_initiator_tag)
281
self.stop_initiator_tag = None
282
if getattr(self, "checker_initiator_tag", False):
348
283
gobject.source_remove(self.checker_initiator_tag)
349
284
self.checker_initiator_tag = None
350
285
self.stop_checker()
351
if self.disable_hook:
352
self.disable_hook(self)
353
self.enabled = False
286
if self.stop_hook:
287
self.stop_hook(self)
354
288
# Do not run this again if called by a gobject.timeout_add
355
289
return False
356
357
290
def __del__(self):
358
self.disable_hook = None
359
self.disable()
360
361
def checker_callback(self, pid, condition, command):
291
self.stop_hook = None
292
self.stop()
293
def checker_callback(self, pid, condition):
362
294
"""The checker has completed, so take appropriate actions."""
295
now = datetime.datetime.now()
363
296
self.checker_callback_tag = None
364
297
self.checker = None
365
if os.WIFEXITED(condition):
366
exitstatus = os.WEXITSTATUS(condition)
367
if exitstatus == 0:
368
logger.info(u"Checker for %(name)s succeeded",
369
vars(self))
370
self.checked_ok()
371
else:
372
logger.info(u"Checker for %(name)s failed",
373
vars(self))
374
else:
298
if os.WIFEXITED(condition) \
299
and (os.WEXITSTATUS(condition) == 0):
300
logger.info(u"Checker for %(name)s succeeded",
301
vars(self))
302
self.last_checked_ok = now
303
gobject.source_remove(self.stop_initiator_tag)
304
self.stop_initiator_tag = gobject.timeout_add\
305
(self._timeout_milliseconds,
306
self.stop)
307
elif not os.WIFEXITED(condition):
375
308
logger.warning(u"Checker for %(name)s crashed?",
376
309
vars(self))
377
378
def checked_ok(self):
379
"""Bump up the timeout for this client.
380
381
This should only be called when the client has been seen,
382
alive and well.
383
"""
384
self.last_checked_ok = datetime.datetime.utcnow()
385
gobject.source_remove(self.disable_initiator_tag)
386
self.disable_initiator_tag = (gobject.timeout_add
387
(self.timeout_milliseconds(),
388
self.disable))
389
310
else:
311
logger.info(u"Checker for %(name)s failed",
312
vars(self))
390
313
def start_checker(self):
391
314
"""Start a new checker subprocess if one is not running.
392
393
315
If a checker already exists, leave it running and do
394
316
nothing."""
395
317
# The reason for not killing a running checker is that if we
398
320
# client would inevitably timeout, since no checker would get
399
321
# a chance to run to completion. If we instead leave running
400
322
# checkers alone, the checker would have to take more time
401
# than 'timeout' for the client to be disabled, which is as it
402
# should be.
403
404
# If a checker exists, make sure it is not a zombie
405
try:
406
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
407
except (AttributeError, OSError), error:
408
if (isinstance(error, OSError)
409
and error.errno != errno.ECHILD):
410
raise error
411
else:
412
if pid:
413
logger.warning(u"Checker was a zombie")
414
gobject.source_remove(self.checker_callback_tag)
415
self.checker_callback(pid, status,
416
self.current_checker_command)
417
# Start a new checker if needed
323
# than 'timeout' for the client to be declared invalid, which
324
# is as it should be.
418
325
if self.checker is None:
419
326
try:
420
# In case checker_command has exactly one % operator
421
command = self.checker_command % self.host
327
# In case check_command has exactly one % operator
328
command = self.check_command % self.host
422
329
except TypeError:
423
330
# Escape attributes for the shell
424
escaped_attrs = dict((key,
425
re.escape(unicode(str(val),
426
errors=
427
u'replace')))
331
escaped_attrs = dict((key, re.escape(str(val)))
428
332
for key, val in
429
333
vars(self).iteritems())
430
334
try:
431
command = self.checker_command % escaped_attrs
335
command = self.check_command % escaped_attrs
432
336
except TypeError, error:
433
337
logger.error(u'Could not format string "%s":'
434
u' %s', self.checker_command, error)
338
u' %s', self.check_command, error)
435
339
return True # Try again later
436
self.current_checker_command = command
437
340
try:
438
341
logger.info(u"Starting checker %r for %s",
439
342
command, self.name)
443
346
# always replaced by /dev/null.)
444
347
self.checker = subprocess.Popen(command,
445
348
close_fds=True,
446
shell=True, cwd=u"/")
447
self.checker_callback_tag = (gobject.child_watch_add
448
(self.checker.pid,
449
self.checker_callback,
450
data=command))
451
# The checker may have completed before the gobject
452
# watch was added. Check for this.
453
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
454
if pid:
455
gobject.source_remove(self.checker_callback_tag)
456
self.checker_callback(pid, status, command)
349
shell=True, cwd="/")
350
self.checker_callback_tag = gobject.child_watch_add\
351
(self.checker.pid,
352
self.checker_callback)
457
353
except OSError, error:
458
354
logger.error(u"Failed to start subprocess: %s",
459
355
error)
460
356
# Re-run this periodically if run by gobject.timeout_add
461
357
return True
462
463
358
def stop_checker(self):
464
359
"""Force the checker process, if any, to stop."""
465
360
if self.checker_callback_tag:
466
361
gobject.source_remove(self.checker_callback_tag)
467
362
self.checker_callback_tag = None
468
if getattr(self, u"checker", None) is None:
363
if getattr(self, "checker", None) is None:
469
364
return
470
365
logger.debug(u"Stopping checker for %(name)s", vars(self))
471
366
try:
472
367
os.kill(self.checker.pid, signal.SIGTERM)
473
#time.sleep(0.5)
368
#os.sleep(0.5)
474
369
#if self.checker.poll() is None:
475
370
# os.kill(self.checker.pid, signal.SIGKILL)
476
371
except OSError, error:
477
372
if error.errno != errno.ESRCH: # No such process
478
373
raise
479
374
self.checker = None
480
481
482
def dbus_service_property(dbus_interface, signature=u"v",
483
access=u"readwrite", byte_arrays=False):
484
"""Decorators for marking methods of a DBusObjectWithProperties to
485
become properties on the D-Bus.
486
487
The decorated method will be called with no arguments by "Get"
488
and with one argument by "Set".
489
490
The parameters, where they are supported, are the same as
491
dbus.service.method, except there is only "signature", since the
492
type from Get() and the type sent to Set() is the same.
493
"""
494
# Encoding deeply encoded byte arrays is not supported yet by the
495
# "Set" method, so we fail early here:
496
if byte_arrays and signature != u"ay":
497
raise ValueError(u"Byte arrays not supported for non-'ay'"
498
u" signature %r" % signature)
499
def decorator(func):
500
func._dbus_is_property = True
501
func._dbus_interface = dbus_interface
502
func._dbus_signature = signature
503
func._dbus_access = access
504
func._dbus_name = func.__name__
505
if func._dbus_name.endswith(u"_dbus_property"):
506
func._dbus_name = func._dbus_name[:-14]
507
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
508
return func
509
return decorator
510
511
512
class DBusPropertyException(dbus.exceptions.DBusException):
513
"""A base class for D-Bus property-related exceptions
514
"""
515
def __unicode__(self):
516
return unicode(str(self))
517
518
519
class DBusPropertyAccessException(DBusPropertyException):
520
"""A property's access permissions disallows an operation.
521
"""
522
pass
523
524
525
class DBusPropertyNotFound(DBusPropertyException):
526
"""An attempt was made to access a non-existing property.
527
"""
528
pass
529
530
531
class DBusObjectWithProperties(dbus.service.Object):
532
"""A D-Bus object with properties.
533
534
Classes inheriting from this can use the dbus_service_property
535
decorator to expose methods as D-Bus properties. It exposes the
536
standard Get(), Set(), and GetAll() methods on the D-Bus.
537
"""
538
539
@staticmethod
540
def _is_dbus_property(obj):
541
return getattr(obj, u"_dbus_is_property", False)
542
543
def _get_all_dbus_properties(self):
544
"""Returns a generator of (name, attribute) pairs
545
"""
546
return ((prop._dbus_name, prop)
547
for name, prop in
548
inspect.getmembers(self, self._is_dbus_property))
549
550
def _get_dbus_property(self, interface_name, property_name):
551
"""Returns a bound method if one exists which is a D-Bus
552
property with the specified name and interface.
553
"""
554
for name in (property_name,
555
property_name + u"_dbus_property"):
556
prop = getattr(self, name, None)
557
if (prop is None
558
or not self._is_dbus_property(prop)
559
or prop._dbus_name != property_name
560
or (interface_name and prop._dbus_interface
561
and interface_name != prop._dbus_interface)):
562
continue
563
return prop
564
# No such property
565
raise DBusPropertyNotFound(self.dbus_object_path + u":"
566
+ interface_name + u"."
567
+ property_name)
568
569
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
570
out_signature=u"v")
571
def Get(self, interface_name, property_name):
572
"""Standard D-Bus property Get() method, see D-Bus standard.
573
"""
574
prop = self._get_dbus_property(interface_name, property_name)
575
if prop._dbus_access == u"write":
576
raise DBusPropertyAccessException(property_name)
577
value = prop()
578
if not hasattr(value, u"variant_level"):
579
return value
580
return type(value)(value, variant_level=value.variant_level+1)
581
582
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
583
def Set(self, interface_name, property_name, value):
584
"""Standard D-Bus property Set() method, see D-Bus standard.
585
"""
586
prop = self._get_dbus_property(interface_name, property_name)
587
if prop._dbus_access == u"read":
588
raise DBusPropertyAccessException(property_name)
589
if prop._dbus_get_args_options[u"byte_arrays"]:
590
# The byte_arrays option is not supported yet on
591
# signatures other than "ay".
592
if prop._dbus_signature != u"ay":
593
raise ValueError
594
value = dbus.ByteArray(''.join(unichr(byte)
595
for byte in value))
596
prop(value)
597
598
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
599
out_signature=u"a{sv}")
600
def GetAll(self, interface_name):
601
"""Standard D-Bus property GetAll() method, see D-Bus
602
standard.
603
604
Note: Will not include properties with access="write".
605
"""
606
all = {}
607
for name, prop in self._get_all_dbus_properties():
608
if (interface_name
609
and interface_name != prop._dbus_interface):
610
# Interface non-empty but did not match
611
continue
612
# Ignore write-only properties
613
if prop._dbus_access == u"write":
614
continue
615
value = prop()
616
if not hasattr(value, u"variant_level"):
617
all[name] = value
618
continue
619
all[name] = type(value)(value, variant_level=
620
value.variant_level+1)
621
return dbus.Dictionary(all, signature=u"sv")
622
623
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
624
out_signature=u"s",
625
path_keyword='object_path',
626
connection_keyword='connection')
627
def Introspect(self, object_path, connection):
628
"""Standard D-Bus method, overloaded to insert property tags.
629
"""
630
xmlstring = dbus.service.Object.Introspect(self, object_path,
631
connection)
632
try:
633
document = xml.dom.minidom.parseString(xmlstring)
634
def make_tag(document, name, prop):
635
e = document.createElement(u"property")
636
e.setAttribute(u"name", name)
637
e.setAttribute(u"type", prop._dbus_signature)
638
e.setAttribute(u"access", prop._dbus_access)
639
return e
640
for if_tag in document.getElementsByTagName(u"interface"):
641
for tag in (make_tag(document, name, prop)
642
for name, prop
643
in self._get_all_dbus_properties()
644
if prop._dbus_interface
645
== if_tag.getAttribute(u"name")):
646
if_tag.appendChild(tag)
647
# Add the names to the return values for the
648
# "org.freedesktop.DBus.Properties" methods
649
if (if_tag.getAttribute(u"name")
650
== u"org.freedesktop.DBus.Properties"):
651
for cn in if_tag.getElementsByTagName(u"method"):
652
if cn.getAttribute(u"name") == u"Get":
653
for arg in cn.getElementsByTagName(u"arg"):
654
if (arg.getAttribute(u"direction")
655
== u"out"):
656
arg.setAttribute(u"name", u"value")
657
elif cn.getAttribute(u"name") == u"GetAll":
658
for arg in cn.getElementsByTagName(u"arg"):
659
if (arg.getAttribute(u"direction")
660
== u"out"):
661
arg.setAttribute(u"name", u"props")
662
xmlstring = document.toxml(u"utf-8")
663
document.unlink()
664
except (AttributeError, xml.dom.DOMException,
665
xml.parsers.expat.ExpatError), error:
666
logger.error(u"Failed to override Introspection method",
667
error)
668
return xmlstring
669
670
671
class ClientDBus(Client, DBusObjectWithProperties):
672
"""A Client class using D-Bus
673
674
Attributes:
675
dbus_object_path: dbus.ObjectPath
676
bus: dbus.SystemBus()
677
"""
678
# dbus.service.Object doesn't use super(), so we can't either.
679
680
def __init__(self, bus = None, *args, **kwargs):
681
self.bus = bus
682
Client.__init__(self, *args, **kwargs)
683
# Only now, when this client is initialized, can it show up on
684
# the D-Bus
685
self.dbus_object_path = (dbus.ObjectPath
686
(u"/clients/"
687
+ self.name.replace(u".", u"_")))
688
DBusObjectWithProperties.__init__(self, self.bus,
689
self.dbus_object_path)
690
691
@staticmethod
692
def _datetime_to_dbus(dt, variant_level=0):
693
"""Convert a UTC datetime.datetime() to a D-Bus type."""
694
return dbus.String(dt.isoformat(),
695
variant_level=variant_level)
696
697
def enable(self):
698
oldstate = getattr(self, u"enabled", False)
699
r = Client.enable(self)
700
if oldstate != self.enabled:
701
# Emit D-Bus signals
702
self.PropertyChanged(dbus.String(u"enabled"),
703
dbus.Boolean(True, variant_level=1))
704
self.PropertyChanged(
705
dbus.String(u"last_enabled"),
706
self._datetime_to_dbus(self.last_enabled,
707
variant_level=1))
708
return r
709
710
def disable(self, quiet = False):
711
oldstate = getattr(self, u"enabled", False)
712
r = Client.disable(self, quiet=quiet)
713
if not quiet and oldstate != self.enabled:
714
# Emit D-Bus signal
715
self.PropertyChanged(dbus.String(u"enabled"),
716
dbus.Boolean(False, variant_level=1))
717
return r
718
719
def __del__(self, *args, **kwargs):
720
try:
721
self.remove_from_connection()
722
except LookupError:
723
pass
724
if hasattr(DBusObjectWithProperties, u"__del__"):
725
DBusObjectWithProperties.__del__(self, *args, **kwargs)
726
Client.__del__(self, *args, **kwargs)
727
728
def checker_callback(self, pid, condition, command,
729
*args, **kwargs):
730
self.checker_callback_tag = None
731
self.checker = None
732
# Emit D-Bus signal
733
self.PropertyChanged(dbus.String(u"checker_running"),
734
dbus.Boolean(False, variant_level=1))
735
if os.WIFEXITED(condition):
736
exitstatus = os.WEXITSTATUS(condition)
737
# Emit D-Bus signal
738
self.CheckerCompleted(dbus.Int16(exitstatus),
739
dbus.Int64(condition),
740
dbus.String(command))
741
else:
742
# Emit D-Bus signal
743
self.CheckerCompleted(dbus.Int16(-1),
744
dbus.Int64(condition),
745
dbus.String(command))
746
747
return Client.checker_callback(self, pid, condition, command,
748
*args, **kwargs)
749
750
def checked_ok(self, *args, **kwargs):
751
r = Client.checked_ok(self, *args, **kwargs)
752
# Emit D-Bus signal
753
self.PropertyChanged(
754
dbus.String(u"last_checked_ok"),
755
(self._datetime_to_dbus(self.last_checked_ok,
756
variant_level=1)))
757
return r
758
759
def start_checker(self, *args, **kwargs):
760
old_checker = self.checker
761
if self.checker is not None:
762
old_checker_pid = self.checker.pid
763
else:
764
old_checker_pid = None
765
r = Client.start_checker(self, *args, **kwargs)
766
# Only if new checker process was started
767
if (self.checker is not None
768
and old_checker_pid != self.checker.pid):
769
# Emit D-Bus signal
770
self.CheckerStarted(self.current_checker_command)
771
self.PropertyChanged(
772
dbus.String(u"checker_running"),
773
dbus.Boolean(True, variant_level=1))
774
return r
775
776
def stop_checker(self, *args, **kwargs):
777
old_checker = getattr(self, u"checker", None)
778
r = Client.stop_checker(self, *args, **kwargs)
779
if (old_checker is not None
780
and getattr(self, u"checker", None) is None):
781
self.PropertyChanged(dbus.String(u"checker_running"),
782
dbus.Boolean(False, variant_level=1))
783
return r
784
785
## D-Bus methods, signals & properties
786
_interface = u"se.bsnet.fukt.Mandos.Client"
787
788
## Signals
789
790
# CheckerCompleted - signal
791
@dbus.service.signal(_interface, signature=u"nxs")
792
def CheckerCompleted(self, exitcode, waitstatus, command):
793
"D-Bus signal"
794
pass
795
796
# CheckerStarted - signal
797
@dbus.service.signal(_interface, signature=u"s")
798
def CheckerStarted(self, command):
799
"D-Bus signal"
800
pass
801
802
# PropertyChanged - signal
803
@dbus.service.signal(_interface, signature=u"sv")
804
def PropertyChanged(self, property, value):
805
"D-Bus signal"
806
pass
807
808
# GotSecret - signal
809
@dbus.service.signal(_interface)
810
def GotSecret(self):
811
"D-Bus signal"
812
pass
813
814
# Rejected - signal
815
@dbus.service.signal(_interface)
816
def Rejected(self):
817
"D-Bus signal"
818
pass
819
820
## Methods
821
822
# CheckedOK - method
823
@dbus.service.method(_interface)
824
def CheckedOK(self):
825
return self.checked_ok()
826
827
# Enable - method
828
@dbus.service.method(_interface)
829
def Enable(self):
830
"D-Bus method"
831
self.enable()
832
833
# StartChecker - method
834
@dbus.service.method(_interface)
835
def StartChecker(self):
836
"D-Bus method"
837
self.start_checker()
838
839
# Disable - method
840
@dbus.service.method(_interface)
841
def Disable(self):
842
"D-Bus method"
843
self.disable()
844
845
# StopChecker - method
846
@dbus.service.method(_interface)
847
def StopChecker(self):
848
self.stop_checker()
849
850
## Properties
851
852
# name - property
853
@dbus_service_property(_interface, signature=u"s", access=u"read")
854
def name_dbus_property(self):
855
return dbus.String(self.name)
856
857
# fingerprint - property
858
@dbus_service_property(_interface, signature=u"s", access=u"read")
859
def fingerprint_dbus_property(self):
860
return dbus.String(self.fingerprint)
861
862
# host - property
863
@dbus_service_property(_interface, signature=u"s",
864
access=u"readwrite")
865
def host_dbus_property(self, value=None):
866
if value is None: # get
867
return dbus.String(self.host)
868
self.host = value
869
# Emit D-Bus signal
870
self.PropertyChanged(dbus.String(u"host"),
871
dbus.String(value, variant_level=1))
872
873
# created - property
874
@dbus_service_property(_interface, signature=u"s", access=u"read")
875
def created_dbus_property(self):
876
return dbus.String(self._datetime_to_dbus(self.created))
877
878
# last_enabled - property
879
@dbus_service_property(_interface, signature=u"s", access=u"read")
880
def last_enabled_dbus_property(self):
881
if self.last_enabled is None:
882
return dbus.String(u"")
883
return dbus.String(self._datetime_to_dbus(self.last_enabled))
884
885
# enabled - property
886
@dbus_service_property(_interface, signature=u"b",
887
access=u"readwrite")
888
def enabled_dbus_property(self, value=None):
889
if value is None: # get
890
return dbus.Boolean(self.enabled)
891
if value:
892
self.enable()
893
else:
894
self.disable()
895
896
# last_checked_ok - property
897
@dbus_service_property(_interface, signature=u"s",
898
access=u"readwrite")
899
def last_checked_ok_dbus_property(self, value=None):
900
if value is not None:
901
self.checked_ok()
902
return
375
def still_valid(self):
376
"""Has the timeout not yet passed for this client?"""
377
now = datetime.datetime.now()
903
378
if self.last_checked_ok is None:
904
return dbus.String(u"")
905
return dbus.String(self._datetime_to_dbus(self
906
.last_checked_ok))
907
908
# timeout - property
909
@dbus_service_property(_interface, signature=u"t",
910
access=u"readwrite")
911
def timeout_dbus_property(self, value=None):
912
if value is None: # get
913
return dbus.UInt64(self.timeout_milliseconds())
914
self.timeout = datetime.timedelta(0, 0, 0, value)
915
# Emit D-Bus signal
916
self.PropertyChanged(dbus.String(u"timeout"),
917
dbus.UInt64(value, variant_level=1))
918
if getattr(self, u"disable_initiator_tag", None) is None:
919
return
920
# Reschedule timeout
921
gobject.source_remove(self.disable_initiator_tag)
922
self.disable_initiator_tag = None
923
time_to_die = (self.
924
_timedelta_to_milliseconds((self
925
.last_checked_ok
926
+ self.timeout)
927
- datetime.datetime
928
.utcnow()))
929
if time_to_die <= 0:
930
# The timeout has passed
931
self.disable()
932
else:
933
self.disable_initiator_tag = (gobject.timeout_add
934
(time_to_die, self.disable))
935
936
# interval - property
937
@dbus_service_property(_interface, signature=u"t",
938
access=u"readwrite")
939
def interval_dbus_property(self, value=None):
940
if value is None: # get
941
return dbus.UInt64(self.interval_milliseconds())
942
self.interval = datetime.timedelta(0, 0, 0, value)
943
# Emit D-Bus signal
944
self.PropertyChanged(dbus.String(u"interval"),
945
dbus.UInt64(value, variant_level=1))
946
if getattr(self, u"checker_initiator_tag", None) is None:
947
return
948
# Reschedule checker run
949
gobject.source_remove(self.checker_initiator_tag)
950
self.checker_initiator_tag = (gobject.timeout_add
951
(value, self.start_checker))
952
self.start_checker() # Start one now, too
953
954
# checker - property
955
@dbus_service_property(_interface, signature=u"s",
956
access=u"readwrite")
957
def checker_dbus_property(self, value=None):
958
if value is None: # get
959
return dbus.String(self.checker_command)
960
self.checker_command = value
961
# Emit D-Bus signal
962
self.PropertyChanged(dbus.String(u"checker"),
963
dbus.String(self.checker_command,
964
variant_level=1))
965
966
# checker_running - property
967
@dbus_service_property(_interface, signature=u"b",
968
access=u"readwrite")
969
def checker_running_dbus_property(self, value=None):
970
if value is None: # get
971
return dbus.Boolean(self.checker is not None)
972
if value:
973
self.start_checker()
974
else:
975
self.stop_checker()
976
977
# object_path - property
978
@dbus_service_property(_interface, signature=u"o", access=u"read")
979
def object_path_dbus_property(self):
980
return self.dbus_object_path # is already a dbus.ObjectPath
981
982
# secret = property
983
@dbus_service_property(_interface, signature=u"ay",
984
access=u"write", byte_arrays=True)
985
def secret_dbus_property(self, value):
986
self.secret = str(value)
987
988
del _interface
989
990
991
class ClientHandler(socketserver.BaseRequestHandler, object):
992
"""A class to handle client connections.
993
994
Instantiated once for each connection to handle it.
379
return now < (self.created + self.timeout)
380
else:
381
return now < (self.last_checked_ok + self.timeout)
382
383
384
def peer_certificate(session):
385
"Return the peer's OpenPGP certificate as a bytestring"
386
# If not an OpenPGP certificate...
387
if gnutls.library.functions.gnutls_certificate_type_get\
388
(session._c_object) \
389
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
390
# ...do the normal thing
391
return session.peer_certificate
392
list_size = ctypes.c_uint()
393
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
394
(session._c_object, ctypes.byref(list_size))
395
if list_size.value == 0:
396
return None
397
cert = cert_list[0]
398
return ctypes.string_at(cert.data, cert.size)
399
400
401
def fingerprint(openpgp):
402
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
403
# New GnuTLS "datum" with the OpenPGP public key
404
datum = gnutls.library.types.gnutls_datum_t\
405
(ctypes.cast(ctypes.c_char_p(openpgp),
406
ctypes.POINTER(ctypes.c_ubyte)),
407
ctypes.c_uint(len(openpgp)))
408
# New empty GnuTLS certificate
409
crt = gnutls.library.types.gnutls_openpgp_crt_t()
410
gnutls.library.functions.gnutls_openpgp_crt_init\
411
(ctypes.byref(crt))
412
# Import the OpenPGP public key into the certificate
413
gnutls.library.functions.gnutls_openpgp_crt_import\
414
(crt, ctypes.byref(datum),
415
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
416
# Verify the self signature in the key
417
crtverify = ctypes.c_uint();
418
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
419
(crt, 0, ctypes.byref(crtverify))
420
if crtverify.value != 0:
421
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
422
raise gnutls.errors.CertificateSecurityError("Verify failed")
423
# New buffer for the fingerprint
424
buffer = ctypes.create_string_buffer(20)
425
buffer_length = ctypes.c_size_t()
426
# Get the fingerprint from the certificate into the buffer
427
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
428
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
429
# Deinit the certificate
430
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
431
# Convert the buffer to a Python bytestring
432
fpr = ctypes.string_at(buffer, buffer_length.value)
433
# Convert the bytestring to hexadecimal notation
434
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
435
return hex_fpr
436
437
438
class tcp_handler(SocketServer.BaseRequestHandler, object):
439
"""A TCP request handler class.
440
Instantiated by IPv6_TCPServer for each request to handle it.
995
441
Note: This will run in its own forked process."""
996
442
997
443
def handle(self):
998
444
logger.info(u"TCP connection from: %s",
999
unicode(self.client_address))
1000
logger.debug(u"IPC Pipe FD: %d",
1001
self.server.child_pipe[1].fileno())
1002
# Open IPC pipe to parent process
1003
with contextlib.nested(self.server.child_pipe[1],
1004
self.server.parent_pipe[0]
1005
) as (ipc, ipc_return):
1006
session = (gnutls.connection
1007
.ClientSession(self.request,
1008
gnutls.connection
1009
.X509Credentials()))
1010
1011
# Note: gnutls.connection.X509Credentials is really a
1012
# generic GnuTLS certificate credentials object so long as
1013
# no X.509 keys are added to it. Therefore, we can use it
1014
# here despite using OpenPGP certificates.
1015
1016
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1017
# u"+AES-256-CBC", u"+SHA1",
1018
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1019
# u"+DHE-DSS"))
1020
# Use a fallback default, since this MUST be set.
1021
priority = self.server.gnutls_priority
1022
if priority is None:
1023
priority = u"NORMAL"
1024
(gnutls.library.functions
1025
.gnutls_priority_set_direct(session._c_object,
1026
priority, None))
1027
1028
# Start communication using the Mandos protocol
1029
# Get protocol number
1030
line = self.request.makefile().readline()
1031
logger.debug(u"Protocol version: %r", line)
1032
try:
1033
if int(line.strip().split()[0]) > 1:
1034
raise RuntimeError
1035
except (ValueError, IndexError, RuntimeError), error:
1036
logger.error(u"Unknown protocol version: %s", error)
1037
return
1038
1039
# Start GnuTLS connection
1040
try:
1041
session.handshake()
1042
except gnutls.errors.GNUTLSError, error:
1043
logger.warning(u"Handshake failed: %s", error)
1044
# Do not run session.bye() here: the session is not
1045
# established. Just abandon the request.
1046
return
1047
logger.debug(u"Handshake succeeded")
1048
try:
1049
try:
1050
fpr = self.fingerprint(self.peer_certificate
1051
(session))
1052
except (TypeError, gnutls.errors.GNUTLSError), error:
1053
logger.warning(u"Bad certificate: %s", error)
1054
return
1055
logger.debug(u"Fingerprint: %s", fpr)
1056
1057
for c in self.server.clients:
1058
if c.fingerprint == fpr:
1059
client = c
1060
break
1061
else:
1062
ipc.write(u"NOTFOUND %s %s\n"
1063
% (fpr, unicode(self.client_address)))
1064
return
1065
1066
class ClientProxy(object):
1067
"""Client proxy object. Not for calling methods."""
1068
def __init__(self, client):
1069
self.client = client
1070
def __getattr__(self, name):
1071
if name.startswith("ipc_"):
1072
def tempfunc():
1073
ipc.write("%s %s\n" % (name[4:].upper(),
1074
self.client.name))
1075
return tempfunc
1076
if not hasattr(self.client, name):
1077
raise AttributeError
1078
ipc.write(u"GETATTR %s %s\n"
1079
% (name, self.client.fingerprint))
1080
return pickle.load(ipc_return)
1081
clientproxy = ClientProxy(client)
1082
# Have to check if client.enabled, since it is
1083
# possible that the client was disabled since the
1084
# GnuTLS session was established.
1085
if not clientproxy.enabled:
1086
clientproxy.ipc_disabled()
1087
return
1088
1089
clientproxy.ipc_sending()
1090
sent_size = 0
1091
while sent_size < len(client.secret):
1092
sent = session.send(client.secret[sent_size:])
1093
logger.debug(u"Sent: %d, remaining: %d",
1094
sent, len(client.secret)
1095
- (sent_size + sent))
1096
sent_size += sent
1097
finally:
1098
session.bye()
1099
1100
@staticmethod
1101
def peer_certificate(session):
1102
"Return the peer's OpenPGP certificate as a bytestring"
1103
# If not an OpenPGP certificate...
1104
if (gnutls.library.functions
1105
.gnutls_certificate_type_get(session._c_object)
1106
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1107
# ...do the normal thing
1108
return session.peer_certificate
1109
list_size = ctypes.c_uint(1)
1110
cert_list = (gnutls.library.functions
1111
.gnutls_certificate_get_peers
1112
(session._c_object, ctypes.byref(list_size)))
1113
if not bool(cert_list) and list_size.value != 0:
1114
raise gnutls.errors.GNUTLSError(u"error getting peer"
1115
u" certificate")
1116
if list_size.value == 0:
1117
return None
1118
cert = cert_list[0]
1119
return ctypes.string_at(cert.data, cert.size)
1120
1121
@staticmethod
1122
def fingerprint(openpgp):
1123
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1124
# New GnuTLS "datum" with the OpenPGP public key
1125
datum = (gnutls.library.types
1126
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1127
ctypes.POINTER
1128
(ctypes.c_ubyte)),
1129
ctypes.c_uint(len(openpgp))))
1130
# New empty GnuTLS certificate
1131
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1132
(gnutls.library.functions
1133
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1134
# Import the OpenPGP public key into the certificate
1135
(gnutls.library.functions
1136
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1137
gnutls.library.constants
1138
.GNUTLS_OPENPGP_FMT_RAW))
1139
# Verify the self signature in the key
1140
crtverify = ctypes.c_uint()
1141
(gnutls.library.functions
1142
.gnutls_openpgp_crt_verify_self(crt, 0,
1143
ctypes.byref(crtverify)))
1144
if crtverify.value != 0:
1145
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1146
raise (gnutls.errors.CertificateSecurityError
1147
(u"Verify failed"))
1148
# New buffer for the fingerprint
1149
buf = ctypes.create_string_buffer(20)
1150
buf_len = ctypes.c_size_t()
1151
# Get the fingerprint from the certificate into the buffer
1152
(gnutls.library.functions
1153
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1154
ctypes.byref(buf_len)))
1155
# Deinit the certificate
1156
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1157
# Convert the buffer to a Python bytestring
1158
fpr = ctypes.string_at(buf, buf_len.value)
1159
# Convert the bytestring to hexadecimal notation
1160
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1161
return hex_fpr
1162
1163
1164
class ForkingMixInWithPipes(socketserver.ForkingMixIn, object):
1165
"""Like socketserver.ForkingMixIn, but also pass a pipe pair."""
1166
def process_request(self, request, client_address):
1167
"""Overrides and wraps the original process_request().
1168
1169
This function creates a new pipe in self.pipe
1170
"""
1171
# Child writes to child_pipe
1172
self.child_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))
1173
# Parent writes to parent_pipe
1174
self.parent_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))
1175
super(ForkingMixInWithPipes,
1176
self).process_request(request, client_address)
1177
# Close unused ends for parent
1178
self.parent_pipe[0].close() # close read end
1179
self.child_pipe[1].close() # close write end
1180
self.add_pipe_fds(self.child_pipe[0], self.parent_pipe[1])
1181
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1182
"""Dummy function; override as necessary"""
1183
child_pipe_fd.close()
1184
parent_pipe_fd.close()
1185
1186
1187
class IPv6_TCPServer(ForkingMixInWithPipes,
1188
socketserver.TCPServer, object):
1189
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1190
445
unicode(self.client_address))
446
session = gnutls.connection.ClientSession\
447
(self.request, gnutls.connection.X509Credentials())
448
449
line = self.request.makefile().readline()
450
logger.debug(u"Protocol version: %r", line)
451
try:
452
if int(line.strip().split()[0]) > 1:
453
raise RuntimeError
454
except (ValueError, IndexError, RuntimeError), error:
455
logger.error(u"Unknown protocol version: %s", error)
456
return
457
458
# Note: gnutls.connection.X509Credentials is really a generic
459
# GnuTLS certificate credentials object so long as no X.509
460
# keys are added to it. Therefore, we can use it here despite
461
# using OpenPGP certificates.
462
463
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
464
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
465
# "+DHE-DSS"))
466
priority = "NORMAL" # Fallback default, since this
467
# MUST be set.
468
if self.server.settings["priority"]:
469
priority = self.server.settings["priority"]
470
gnutls.library.functions.gnutls_priority_set_direct\
471
(session._c_object, priority, None);
472
473
try:
474
session.handshake()
475
except gnutls.errors.GNUTLSError, error:
476
logger.warning(u"Handshake failed: %s", error)
477
# Do not run session.bye() here: the session is not
478
# established. Just abandon the request.
479
return
480
try:
481
fpr = fingerprint(peer_certificate(session))
482
except (TypeError, gnutls.errors.GNUTLSError), error:
483
logger.warning(u"Bad certificate: %s", error)
484
session.bye()
485
return
486
logger.debug(u"Fingerprint: %s", fpr)
487
client = None
488
for c in self.server.clients:
489
if c.fingerprint == fpr:
490
client = c
491
break
492
if not client:
493
logger.warning(u"Client not found for fingerprint: %s",
494
fpr)
495
session.bye()
496
return
497
# Have to check if client.still_valid(), since it is possible
498
# that the client timed out while establishing the GnuTLS
499
# session.
500
if not client.still_valid():
501
logger.warning(u"Client %(name)s is invalid",
502
vars(client))
503
session.bye()
504
return
505
sent_size = 0
506
while sent_size < len(client.secret):
507
sent = session.send(client.secret[sent_size:])
508
logger.debug(u"Sent: %d, remaining: %d",
509
sent, len(client.secret)
510
- (sent_size + sent))
511
sent_size += sent
512
session.bye()
513
514
515
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
516
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1191
517
Attributes:
1192
enabled: Boolean; whether this server is activated yet
1193
interface: None or a network interface name (string)
1194
use_ipv6: Boolean; to use IPv6 or not
518
settings: Server settings
519
clients: Set() of Client objects
1195
520
"""
1196
def __init__(self, server_address, RequestHandlerClass,
1197
interface=None, use_ipv6=True):
1198
self.interface = interface
1199
if use_ipv6:
1200
self.address_family = socket.AF_INET6
1201
socketserver.TCPServer.__init__(self, server_address,
1202
RequestHandlerClass)
521
address_family = socket.AF_INET6
522
def __init__(self, *args, **kwargs):
523
if "settings" in kwargs:
524
self.settings = kwargs["settings"]
525
del kwargs["settings"]
526
if "clients" in kwargs:
527
self.clients = kwargs["clients"]
528
del kwargs["clients"]
529
return super(type(self), self).__init__(*args, **kwargs)
1203
530
def server_bind(self):
1204
531
"""This overrides the normal server_bind() function
1205
532
to bind to an interface if one was specified, and also NOT to
1206
533
bind to an address or port if they were not specified."""
1207
if self.interface is not None:
1208
if SO_BINDTODEVICE is None:
1209
logger.error(u"SO_BINDTODEVICE does not exist;"
1210
u" cannot bind to interface %s",
1211
self.interface)
1212
else:
1213
try:
1214
self.socket.setsockopt(socket.SOL_SOCKET,
1215
SO_BINDTODEVICE,
1216
str(self.interface
1217
+ u'\0'))
1218
except socket.error, error:
1219
if error[0] == errno.EPERM:
1220
logger.error(u"No permission to"
1221
u" bind to interface %s",
1222
self.interface)
1223
elif error[0] == errno.ENOPROTOOPT:
1224
logger.error(u"SO_BINDTODEVICE not available;"
1225
u" cannot bind to interface %s",
1226
self.interface)
1227
else:
1228
raise
534
if self.settings["interface"]:
535
# 25 is from /usr/include/asm-i486/socket.h
536
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
537
try:
538
self.socket.setsockopt(socket.SOL_SOCKET,
539
SO_BINDTODEVICE,
540
self.settings["interface"])
541
except socket.error, error:
542
if error[0] == errno.EPERM:
543
logger.error(u"No permission to"
544
u" bind to interface %s",
545
self.settings["interface"])
546
else:
547
raise error
1229
548
# Only bind(2) the socket if we really need to.
1230
549
if self.server_address[0] or self.server_address[1]:
1231
550
if not self.server_address[0]:
1232
if self.address_family == socket.AF_INET6:
1233
any_address = u"::" # in6addr_any
1234
else:
1235
any_address = socket.INADDR_ANY
1236
self.server_address = (any_address,
551
in6addr_any = "::"
552
self.server_address = (in6addr_any,
1237
553
self.server_address[1])
1238
554
elif not self.server_address[1]:
1239
555
self.server_address = (self.server_address[0],
1240
556
0)
1241
# if self.interface:
557
# if self.settings["interface"]:
1242
558
# self.server_address = (self.server_address[0],
1243
559
# 0, # port
1244
560
# 0, # flowinfo
1245
561
# if_nametoindex
1246
# (self.interface))
1247
return socketserver.TCPServer.server_bind(self)
1248
1249
1250
class MandosServer(IPv6_TCPServer):
1251
"""Mandos server.
1252
1253
Attributes:
1254
clients: set of Client objects
1255
gnutls_priority GnuTLS priority string
1256
use_dbus: Boolean; to emit D-Bus signals or not
1257
1258
Assumes a gobject.MainLoop event loop.
1259
"""
1260
def __init__(self, server_address, RequestHandlerClass,
1261
interface=None, use_ipv6=True, clients=None,
1262
gnutls_priority=None, use_dbus=True):
1263
self.enabled = False
1264
self.clients = clients
1265
if self.clients is None:
1266
self.clients = set()
1267
self.use_dbus = use_dbus
1268
self.gnutls_priority = gnutls_priority
1269
IPv6_TCPServer.__init__(self, server_address,
1270
RequestHandlerClass,
1271
interface = interface,
1272
use_ipv6 = use_ipv6)
1273
def server_activate(self):
1274
if self.enabled:
1275
return socketserver.TCPServer.server_activate(self)
1276
def enable(self):
1277
self.enabled = True
1278
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1279
# Call "handle_ipc" for both data and EOF events
1280
gobject.io_add_watch(child_pipe_fd.fileno(),
1281
gobject.IO_IN | gobject.IO_HUP,
1282
functools.partial(self.handle_ipc,
1283
reply = parent_pipe_fd,
1284
sender= child_pipe_fd))
1285
def handle_ipc(self, source, condition, reply=None, sender=None):
1286
condition_names = {
1287
gobject.IO_IN: u"IN", # There is data to read.
1288
gobject.IO_OUT: u"OUT", # Data can be written (without
1289
# blocking).
1290
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1291
gobject.IO_ERR: u"ERR", # Error condition.
1292
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1293
# broken, usually for pipes and
1294
# sockets).
1295
}
1296
conditions_string = ' | '.join(name
1297
for cond, name in
1298
condition_names.iteritems()
1299
if cond & condition)
1300
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1301
conditions_string)
1302
1303
# Read a line from the file object
1304
cmdline = sender.readline()
1305
if not cmdline: # Empty line means end of file
1306
# close the IPC pipes
1307
sender.close()
1308
reply.close()
1309
1310
# Stop calling this function
1311
return False
1312
1313
logger.debug(u"IPC command: %r", cmdline)
1314
1315
# Parse and act on command
1316
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1317
1318
if cmd == u"NOTFOUND":
1319
fpr, address = args.split(None, 1)
1320
logger.warning(u"Client not found for fingerprint: %s, ad"
1321
u"dress: %s", fpr, address)
1322
if self.use_dbus:
1323
# Emit D-Bus signal
1324
mandos_dbus_service.ClientNotFound(fpr, address)
1325
elif cmd == u"DISABLED":
1326
for client in self.clients:
1327
if client.name == args:
1328
logger.warning(u"Client %s is disabled", args)
1329
if self.use_dbus:
1330
# Emit D-Bus signal
1331
client.Rejected()
1332
break
1333
else:
1334
logger.error(u"Unknown client %s is disabled", args)
1335
elif cmd == u"SENDING":
1336
for client in self.clients:
1337
if client.name == args:
1338
logger.info(u"Sending secret to %s", client.name)
1339
client.checked_ok()
1340
if self.use_dbus:
1341
# Emit D-Bus signal
1342
client.GotSecret()
1343
break
1344
else:
1345
logger.error(u"Sending secret to unknown client %s",
1346
args)
1347
elif cmd == u"GETATTR":
1348
attr_name, fpr = args.split(None, 1)
1349
for client in self.clients:
1350
if client.fingerprint == fpr:
1351
attr_value = getattr(client, attr_name, None)
1352
logger.debug("IPC reply: %r", attr_value)
1353
pickle.dump(attr_value, reply)
1354
break
1355
else:
1356
logger.error(u"Client %s on address %s requesting "
1357
u"attribute %s not found", fpr, address,
1358
attr_name)
1359
pickle.dump(None, reply)
1360
else:
1361
logger.error(u"Unknown IPC command: %r", cmdline)
1362
1363
# Keep calling this function
1364
return True
562
# (self.settings
563
# ["interface"]))
564
return super(type(self), self).server_bind()
1365
565
1366
566
1367
567
def string_to_delta(interval):
1368
568
"""Parse a string and return a datetime.timedelta
1369
1370
>>> string_to_delta(u'7d')
569
570
>>> string_to_delta('7d')
1371
571
datetime.timedelta(7)
1372
>>> string_to_delta(u'60s')
572
>>> string_to_delta('60s')
1373
573
datetime.timedelta(0, 60)
1374
>>> string_to_delta(u'60m')
574
>>> string_to_delta('60m')
1375
575
datetime.timedelta(0, 3600)
1376
>>> string_to_delta(u'24h')
576
>>> string_to_delta('24h')
1377
577
datetime.timedelta(1)
1378
578
>>> string_to_delta(u'1w')
1379
579
datetime.timedelta(7)
1380
>>> string_to_delta(u'5m 30s')
580
>>> string_to_delta('5m 30s')
1381
581
datetime.timedelta(0, 330)
1382
582
"""
1383
583
timevalue = datetime.timedelta(0)
1384
584
for s in interval.split():
1385
585
try:
1386
suffix = unicode(s[-1])
1387
value = int(s[:-1])
586
suffix=unicode(s[-1])
587
value=int(s[:-1])
1388
588
if suffix == u"d":
1389
589
delta = datetime.timedelta(value)
1390
590
elif suffix == u"s":
1396
596
elif suffix == u"w":
1397
597
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1398
598
else:
1399
raise ValueError(u"Unknown suffix %r" % suffix)
1400
except (ValueError, IndexError), e:
1401
raise ValueError(e.message)
599
raise ValueError
600
except (ValueError, IndexError):
601
raise ValueError
1402
602
timevalue += delta
1403
603
return timevalue
1404
604
1405
605
606
def server_state_changed(state):
607
"""Derived from the Avahi example code"""
608
if state == avahi.SERVER_COLLISION:
609
logger.error(u"Zeroconf server name collision")
610
service.remove()
611
elif state == avahi.SERVER_RUNNING:
612
service.add()
613
614
615
def entry_group_state_changed(state, error):
616
"""Derived from the Avahi example code"""
617
logger.debug(u"Avahi state change: %i", state)
618
619
if state == avahi.ENTRY_GROUP_ESTABLISHED:
620
logger.debug(u"Zeroconf service established.")
621
elif state == avahi.ENTRY_GROUP_COLLISION:
622
logger.warning(u"Zeroconf service name collision.")
623
service.rename()
624
elif state == avahi.ENTRY_GROUP_FAILURE:
625
logger.critical(u"Avahi: Error in group state changed %s",
626
unicode(error))
627
raise AvahiGroupError("State changed: %s", str(error))
628
1406
629
def if_nametoindex(interface):
1407
"""Call the C function if_nametoindex(), or equivalent
1408
1409
Note: This function cannot accept a unicode string."""
630
"""Call the C function if_nametoindex(), or equivalent"""
1410
631
global if_nametoindex
1411
632
try:
1412
if_nametoindex = (ctypes.cdll.LoadLibrary
1413
(ctypes.util.find_library(u"c"))
1414
.if_nametoindex)
633
if "ctypes.util" not in sys.modules:
634
import ctypes.util
635
if_nametoindex = ctypes.cdll.LoadLibrary\
636
(ctypes.util.find_library("c")).if_nametoindex
1415
637
except (OSError, AttributeError):
1416
logger.warning(u"Doing if_nametoindex the hard way")
638
if "struct" not in sys.modules:
639
import struct
640
if "fcntl" not in sys.modules:
641
import fcntl
1417
642
def if_nametoindex(interface):
1418
643
"Get an interface index the hard way, i.e. using fcntl()"
1419
644
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1420
with contextlib.closing(socket.socket()) as s:
1421
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1422
struct.pack(str(u"16s16x"),
1423
interface))
1424
interface_index = struct.unpack(str(u"I"),
1425
ifreq[16:20])[0]
645
s = socket.socket()
646
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
647
struct.pack("16s16x", interface))
648
s.close()
649
interface_index = struct.unpack("I", ifreq[16:20])[0]
1426
650
return interface_index
1427
651
return if_nametoindex(interface)
1428
652
1429
653
1430
654
def daemon(nochdir = False, noclose = False):
1431
655
"""See daemon(3). Standard BSD Unix function.
1432
1433
656
This should really exist as os.daemon, but it doesn't (yet)."""
1434
657
if os.fork():
1435
658
sys.exit()
1436
659
os.setsid()
1437
660
if not nochdir:
1438
os.chdir(u"/")
661
os.chdir("/")
1439
662
if os.fork():
1440
663
sys.exit()
1441
664
if not noclose:
1443
666
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1444
667
if not stat.S_ISCHR(os.fstat(null).st_mode):
1445
668
raise OSError(errno.ENODEV,
1446
u"%s not a character device"
1447
% os.path.devnull)
669
"/dev/null not a character device")
1448
670
os.dup2(null, sys.stdin.fileno())
1449
671
os.dup2(null, sys.stdout.fileno())
1450
672
os.dup2(null, sys.stderr.fileno())
1453
675
1454
676
1455
677
def main():
1456
1457
##################################################################
1458
# Parsing of options, both command line and config file
1459
1460
parser = optparse.OptionParser(version = "%%prog %s" % version)
1461
parser.add_option("-i", u"--interface", type=u"string",
1462
metavar="IF", help=u"Bind to interface IF")
1463
parser.add_option("-a", u"--address", type=u"string",
1464
help=u"Address to listen for requests on")
1465
parser.add_option("-p", u"--port", type=u"int",
1466
help=u"Port number to receive requests on")
1467
parser.add_option("--check", action=u"store_true",
1468
help=u"Run self-test")
1469
parser.add_option("--debug", action=u"store_true",
1470
help=u"Debug mode; run in foreground and log to"
1471
u" terminal")
1472
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1473
u" priority string (see GnuTLS documentation)")
1474
parser.add_option("--servicename", type=u"string",
1475
metavar=u"NAME", help=u"Zeroconf service name")
1476
parser.add_option("--configdir", type=u"string",
1477
default=u"/etc/mandos", metavar=u"DIR",
1478
help=u"Directory to search for configuration"
1479
u" files")
1480
parser.add_option("--no-dbus", action=u"store_false",
1481
dest=u"use_dbus", help=u"Do not provide D-Bus"
1482
u" system bus interface")
1483
parser.add_option("--no-ipv6", action=u"store_false",
1484
dest=u"use_ipv6", help=u"Do not use IPv6")
1485
options = parser.parse_args()[0]
678
global main_loop_started
679
main_loop_started = False
680
681
parser = OptionParser(version = "%%prog %s" % version)
682
parser.add_option("-i", "--interface", type="string",
683
metavar="IF", help="Bind to interface IF")
684
parser.add_option("-a", "--address", type="string",
685
help="Address to listen for requests on")
686
parser.add_option("-p", "--port", type="int",
687
help="Port number to receive requests on")
688
parser.add_option("--check", action="store_true", default=False,
689
help="Run self-test")
690
parser.add_option("--debug", action="store_true",
691
help="Debug mode; run in foreground and log to"
692
" terminal")
693
parser.add_option("--priority", type="string", help="GnuTLS"
694
" priority string (see GnuTLS documentation)")
695
parser.add_option("--servicename", type="string", metavar="NAME",
696
help="Zeroconf service name")
697
parser.add_option("--configdir", type="string",
698
default="/etc/mandos", metavar="DIR",
699
help="Directory to search for configuration"
700
" files")
701
(options, args) = parser.parse_args()
1486
702
1487
703
if options.check:
1488
704
import doctest
1490
706
sys.exit()
1491
707
1492
708
# Default values for config file for server-global settings
1493
server_defaults = { u"interface": u"",
1494
u"address": u"",
1495
u"port": u"",
1496
u"debug": u"False",
1497
u"priority":
1498
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1499
u"servicename": u"Mandos",
1500
u"use_dbus": u"True",
1501
u"use_ipv6": u"True",
709
server_defaults = { "interface": "",
710
"address": "",
711
"port": "",
712
"debug": "False",
713
"priority":
714
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
715
"servicename": "Mandos",
1502
716
}
1503
717
1504
718
# Parse config file for server-global settings
1505
server_config = configparser.SafeConfigParser(server_defaults)
719
server_config = ConfigParser.SafeConfigParser(server_defaults)
1506
720
del server_defaults
1507
server_config.read(os.path.join(options.configdir,
1508
u"mandos.conf"))
721
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1509
722
# Convert the SafeConfigParser object to a dict
1510
723
server_settings = server_config.defaults()
1511
# Use the appropriate methods on the non-string config options
1512
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1513
server_settings[option] = server_config.getboolean(u"DEFAULT",
1514
option)
1515
if server_settings["port"]:
1516
server_settings["port"] = server_config.getint(u"DEFAULT",
1517
u"port")
724
# Use getboolean on the boolean config option
725
server_settings["debug"] = server_config.getboolean\
726
("DEFAULT", "debug")
1518
727
del server_config
1519
728
1520
729
# Override the settings from the config file with command line
1521
730
# options, if set.
1522
for option in (u"interface", u"address", u"port", u"debug",
1523
u"priority", u"servicename", u"configdir",
1524
u"use_dbus", u"use_ipv6"):
731
for option in ("interface", "address", "port", "debug",
732
"priority", "servicename", "configdir"):
1525
733
value = getattr(options, option)
1526
734
if value is not None:
1527
735
server_settings[option] = value
1528
736
del options
1529
# Force all strings to be unicode
1530
for option in server_settings.keys():
1531
if type(server_settings[option]) is str:
1532
server_settings[option] = unicode(server_settings[option])
1533
737
# Now we have our good server settings in "server_settings"
1534
738
1535
##################################################################
1536
1537
# For convenience
1538
debug = server_settings[u"debug"]
1539
use_dbus = server_settings[u"use_dbus"]
1540
use_ipv6 = server_settings[u"use_ipv6"]
739
debug = server_settings["debug"]
1541
740
1542
741
if not debug:
1543
742
syslogger.setLevel(logging.WARNING)
1544
743
console.setLevel(logging.WARNING)
1545
744
1546
if server_settings[u"servicename"] != u"Mandos":
1547
syslogger.setFormatter(logging.Formatter
1548
(u'Mandos (%s) [%%(process)d]:'
1549
u' %%(levelname)s: %%(message)s'
1550
% server_settings[u"servicename"]))
745
if server_settings["servicename"] != "Mandos":
746
syslogger.setFormatter(logging.Formatter\
747
('Mandos (%s): %%(levelname)s:'
748
' %%(message)s'
749
% server_settings["servicename"]))
1551
750
1552
751
# Parse config file with clients
1553
client_defaults = { u"timeout": u"1h",
1554
u"interval": u"5m",
1555
u"checker": u"fping -q -- %%(host)s",
1556
u"host": u"",
752
client_defaults = { "timeout": "1h",
753
"interval": "5m",
754
"checker": "fping -q -- %(host)s",
755
"host": "",
1557
756
}
1558
client_config = configparser.SafeConfigParser(client_defaults)
1559
client_config.read(os.path.join(server_settings[u"configdir"],
1560
u"clients.conf"))
1561
1562
global mandos_dbus_service
1563
mandos_dbus_service = None
1564
1565
tcp_server = MandosServer((server_settings[u"address"],
1566
server_settings[u"port"]),
1567
ClientHandler,
1568
interface=(server_settings[u"interface"]
1569
or None),
1570
use_ipv6=use_ipv6,
1571
gnutls_priority=
1572
server_settings[u"priority"],
1573
use_dbus=use_dbus)
1574
pidfilename = u"/var/run/mandos.pid"
1575
try:
1576
pidfile = open(pidfilename, u"w")
1577
except IOError:
1578
logger.error(u"Could not open file %r", pidfilename)
1579
1580
try:
1581
uid = pwd.getpwnam(u"_mandos").pw_uid
1582
gid = pwd.getpwnam(u"_mandos").pw_gid
1583
except KeyError:
1584
try:
1585
uid = pwd.getpwnam(u"mandos").pw_uid
1586
gid = pwd.getpwnam(u"mandos").pw_gid
1587
except KeyError:
1588
try:
1589
uid = pwd.getpwnam(u"nobody").pw_uid
1590
gid = pwd.getpwnam(u"nobody").pw_gid
1591
except KeyError:
1592
uid = 65534
1593
gid = 65534
1594
try:
1595
os.setgid(gid)
1596
os.setuid(uid)
1597
except OSError, error:
1598
if error[0] != errno.EPERM:
1599
raise error
1600
1601
# Enable all possible GnuTLS debugging
1602
if debug:
1603
# "Use a log level over 10 to enable all debugging options."
1604
# - GnuTLS manual
1605
gnutls.library.functions.gnutls_global_set_log_level(11)
1606
1607
@gnutls.library.types.gnutls_log_func
1608
def debug_gnutls(level, string):
1609
logger.debug(u"GnuTLS: %s", string[:-1])
1610
1611
(gnutls.library.functions
1612
.gnutls_global_set_log_function(debug_gnutls))
757
client_config = ConfigParser.SafeConfigParser(client_defaults)
758
client_config.read(os.path.join(server_settings["configdir"],
759
"clients.conf"))
760
761
global service
762
service = AvahiService(name = server_settings["servicename"],
763
type = "_mandos._tcp", );
764
if server_settings["interface"]:
765
service.interface = if_nametoindex\
766
(server_settings["interface"])
1613
767
1614
768
global main_loop
769
global bus
770
global server
1615
771
# From the Avahi example code
1616
772
DBusGMainLoop(set_as_default=True )
1617
773
main_loop = gobject.MainLoop()
1618
774
bus = dbus.SystemBus()
775
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
776
avahi.DBUS_PATH_SERVER),
777
avahi.DBUS_INTERFACE_SERVER)
1619
778
# End of Avahi example code
1620
if use_dbus:
1621
try:
1622
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1623
bus, do_not_queue=True)
1624
except dbus.exceptions.NameExistsException, e:
1625
logger.error(unicode(e) + u", disabling D-Bus")
1626
use_dbus = False
1627
server_settings[u"use_dbus"] = False
1628
tcp_server.use_dbus = False
1629
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1630
service = AvahiService(name = server_settings[u"servicename"],
1631
servicetype = u"_mandos._tcp",
1632
protocol = protocol, bus = bus)
1633
if server_settings["interface"]:
1634
service.interface = (if_nametoindex
1635
(str(server_settings[u"interface"])))
1636
1637
client_class = Client
1638
if use_dbus:
1639
client_class = functools.partial(ClientDBus, bus = bus)
1640
tcp_server.clients.update(set(
1641
client_class(name = section,
1642
config= dict(client_config.items(section)))
1643
for section in client_config.sections()))
1644
if not tcp_server.clients:
1645
logger.warning(u"No clients defined")
779
780
clients = Set()
781
def remove_from_clients(client):
782
clients.remove(client)
783
if not clients:
784
logger.critical(u"No clients left, exiting")
785
sys.exit()
786
787
clients.update(Set(Client(name = section,
788
stop_hook = remove_from_clients,
789
config
790
= dict(client_config.items(section)))
791
for section in client_config.sections()))
792
if not clients:
793
logger.critical(u"No clients defined")
794
sys.exit(1)
1646
795
1647
796
if debug:
1648
797
# Redirect stdin so all checkers get /dev/null
1656
805
# Close all input and output, do double fork, etc.
1657
806
daemon()
1658
807
808
pidfilename = "/var/run/mandos/mandos.pid"
809
pid = os.getpid()
1659
810
try:
1660
with pidfile:
1661
pid = os.getpid()
1662
pidfile.write(str(pid) + "\n")
811
pidfile = open(pidfilename, "w")
812
pidfile.write(str(pid) + "\n")
813
pidfile.close()
1663
814
del pidfile
1664
except IOError:
1665
logger.error(u"Could not write to file %r with PID %d",
1666
pidfilename, pid)
1667
except NameError:
1668
# "pidfile" was never created
1669
pass
1670
del pidfilename
815
except IOError, err:
816
logger.error(u"Could not write %s file with PID %d",
817
pidfilename, os.getpid())
818
819
def cleanup():
820
"Cleanup function; run on exit"
821
global group
822
# From the Avahi example code
823
if not group is None:
824
group.Free()
825
group = None
826
# End of Avahi example code
827
828
while clients:
829
client = clients.pop()
830
client.stop_hook = None
831
client.stop()
832
833
atexit.register(cleanup)
1671
834
1672
835
if not debug:
1673
836
signal.signal(signal.SIGINT, signal.SIG_IGN)
1674
837
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1675
838
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1676
839
1677
if use_dbus:
1678
class MandosDBusService(dbus.service.Object):
1679
"""A D-Bus proxy object"""
1680
def __init__(self):
1681
dbus.service.Object.__init__(self, bus, u"/")
1682
_interface = u"se.bsnet.fukt.Mandos"
1683
1684
@dbus.service.signal(_interface, signature=u"o")
1685
def ClientAdded(self, objpath):
1686
"D-Bus signal"
1687
pass
1688
1689
@dbus.service.signal(_interface, signature=u"ss")
1690
def ClientNotFound(self, fingerprint, address):
1691
"D-Bus signal"
1692
pass
1693
1694
@dbus.service.signal(_interface, signature=u"os")
1695
def ClientRemoved(self, objpath, name):
1696
"D-Bus signal"
1697
pass
1698
1699
@dbus.service.method(_interface, out_signature=u"ao")
1700
def GetAllClients(self):
1701
"D-Bus method"
1702
return dbus.Array(c.dbus_object_path
1703
for c in tcp_server.clients)
1704
1705
@dbus.service.method(_interface,
1706
out_signature=u"a{oa{sv}}")
1707
def GetAllClientsWithProperties(self):
1708
"D-Bus method"
1709
return dbus.Dictionary(
1710
((c.dbus_object_path, c.GetAll(u""))
1711
for c in tcp_server.clients),
1712
signature=u"oa{sv}")
1713
1714
@dbus.service.method(_interface, in_signature=u"o")
1715
def RemoveClient(self, object_path):
1716
"D-Bus method"
1717
for c in tcp_server.clients:
1718
if c.dbus_object_path == object_path:
1719
tcp_server.clients.remove(c)
1720
c.remove_from_connection()
1721
# Don't signal anything except ClientRemoved
1722
c.disable(quiet=True)
1723
# Emit D-Bus signal
1724
self.ClientRemoved(object_path, c.name)
1725
return
1726
raise KeyError(object_path)
1727
1728
del _interface
1729
1730
mandos_dbus_service = MandosDBusService()
1731
1732
def cleanup():
1733
"Cleanup function; run on exit"
1734
service.cleanup()
1735
1736
while tcp_server.clients:
1737
client = tcp_server.clients.pop()
1738
if use_dbus:
1739
client.remove_from_connection()
1740
client.disable_hook = None
1741
# Don't signal anything except ClientRemoved
1742
client.disable(quiet=True)
1743
if use_dbus:
1744
# Emit D-Bus signal
1745
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1746
client.name)
1747
1748
atexit.register(cleanup)
1749
1750
for client in tcp_server.clients:
1751
if use_dbus:
1752
# Emit D-Bus signal
1753
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1754
client.enable()
1755
1756
tcp_server.enable()
1757
tcp_server.server_activate()
1758
840
for client in clients:
841
client.start()
842
843
tcp_server = IPv6_TCPServer((server_settings["address"],
844
server_settings["port"]),
845
tcp_handler,
846
settings=server_settings,
847
clients=clients)
1759
848
# Find out what port we got
1760
849
service.port = tcp_server.socket.getsockname()[1]
1761
if use_ipv6:
1762
logger.info(u"Now listening on address %r, port %d,"
1763
" flowinfo %d, scope_id %d"
1764
% tcp_server.socket.getsockname())
1765
else: # IPv4
1766
logger.info(u"Now listening on address %r, port %d"
1767
% tcp_server.socket.getsockname())
850
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
851
u" scope_id %d" % tcp_server.socket.getsockname())
1768
852
1769
853
#service.interface = tcp_server.socket.getsockname()[3]
1770
854
1771
855
try:
1772
856
# From the Avahi example code
857
server.connect_to_signal("StateChanged", server_state_changed)
1773
858
try:
1774
service.activate()
859
server_state_changed(server.GetState())
1775
860
except dbus.exceptions.DBusException, error:
1776
861
logger.critical(u"DBusException: %s", error)
1777
cleanup()
1778
862
sys.exit(1)
1779
863
# End of Avahi example code
1780
864
1781
865
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1782
866
lambda *args, **kwargs:
1783
(tcp_server.handle_request
1784
(*args[2:], **kwargs) or True))
867
tcp_server.handle_request\
868
(*args[2:], **kwargs) or True)
1785
869
1786
870
logger.debug(u"Starting main loop")
871
main_loop_started = True
1787
872
main_loop.run()
1788
873
except AvahiError, error:
1789
logger.critical(u"AvahiError: %s", error)
1790
cleanup()
874
logger.critical(u"AvahiError: %s" + unicode(error))
1791
875
sys.exit(1)
1792
876
except KeyboardInterrupt:
1793
877
if debug:
1794
print >> sys.stderr
1795
logger.debug(u"Server received KeyboardInterrupt")
1796
logger.debug(u"Server exiting")
1797
# Must run before the D-Bus bus name gets deregistered
1798
cleanup()
878
print
1799
879
1800
880
if __name__ == '__main__':
1801
881
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0