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- Committer: Teddy Hogeborn
- Date: 2008-10-03 09:32:30 UTC
- Revision ID: teddy@fukt.bsnet.se-20081003093230-rshn19e0c19zz12i
* .bzrignore (plugins.d/askpass-fifo): Added.
* Makefile (FORTIFY): Added "-fstack-protector-all".
(mandos, mandos-keygen): Use more strict regexps when updating the
version number.
* mandos (Client.__init__): Use os.path.expandvars() and
os.path.expanduser() on the "secfile"
config value.
* plugins.d/splashy.c: Update comments and order of #include's.
(main): Check user and group when looking for running splashy
process. Do not ignore ENOENT from execl(). Use _exit()
instead of "return" when an error happens in child
processes. Bug fix: Only wait for splashy_update
completion if it was started. Bug fix: detect failing
waitpid(). Only kill splashy_update if it is running. Do
the killing of the old splashy process before the fork().
Do setsid() and setuid(geteuid()) before starting the new
splashy. Report failing execl().
* plugins.d/usplash.c: Update comments and order of #include's.
(main): Check user and group when looking for running usplash
process. Do not report execv() error if interrupted by a
signal.
* Makefile (FORTIFY): Added "-fstack-protector-all".
(mandos, mandos-keygen): Use more strict regexps when updating the
version number.
* mandos (Client.__init__): Use os.path.expandvars() and
os.path.expanduser() on the "secfile"
config value.
* plugins.d/splashy.c: Update comments and order of #include's.
(main): Check user and group when looking for running splashy
process. Do not ignore ENOENT from execl(). Use _exit()
instead of "return" when an error happens in child
processes. Bug fix: Only wait for splashy_update
completion if it was started. Bug fix: detect failing
waitpid(). Only kill splashy_update if it is running. Do
the killing of the old splashy process before the fork().
Do setsid() and setuid(geteuid()) before starting the new
splashy. Report failing execl().
* plugins.d/usplash.c: Update comments and order of #include's.
(main): Check user and group when looking for running usplash
process. Do not report execv() error if interrupted by a
signal.
- files added:
- debian/mandos-client.config
- files removed:
- NEWS
- files modified:
- INSTALL
added
removed
mandos
11
11
# and some lines in "main".
12
12
#
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13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2008 Teddy Hogeborn & Björn Påhlsson
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15
#
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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
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#
33
32
34
from __future__ import division, with_statement, absolute_import
33
from __future__ import division
35
34
36
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
56
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import logging
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56
import logging.handlers
58
57
import pwd
59
from contextlib import closing
60
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import dbus
62
import dbus.service
63
60
import gobject
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61
import avahi
65
62
from dbus.mainloop.glib import DBusGMainLoop
66
63
import ctypes
67
64
import ctypes.util
68
65
69
version = "1.0.7"
66
version = "1.0"
70
67
71
68
logger = logging.Logger('mandos')
72
syslogger = (logging.handlers.SysLogHandler
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
75
syslogger.setFormatter(logging.Formatter
76
('Mandos [%(process)d]: %(levelname)s:'
77
' %(message)s'))
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'))
78
74
logger.addHandler(syslogger)
79
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console = logging.StreamHandler()
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
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console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
78
' %(message)s'))
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79
logger.addHandler(console)
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80
85
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class AvahiError(Exception):
86
def __init__(self, value, *args, **kwargs):
82
def __init__(self, value):
87
83
self.value = value
88
super(AvahiError, self).__init__(value, *args, **kwargs)
89
def __unicode__(self):
90
return unicode(repr(self.value))
84
super(AvahiError, self).__init__()
85
def __str__(self):
86
return repr(self.value)
91
87
92
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class AvahiServiceError(AvahiError):
93
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pass
113
109
a sensible number of times
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110
"""
115
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def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
servicetype = None, port = None, TXT = None,
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domain = "", host = "", max_renames = 32768,
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protocol = avahi.PROTO_UNSPEC):
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servicetype = None, port = None, TXT = None, domain = "",
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host = "", max_renames = 32768):
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self.interface = interface
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115
self.name = name
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self.type = servicetype
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self.port = port
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self.TXT = TXT if TXT is not None else []
118
if TXT is None:
119
self.TXT = []
120
else:
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self.TXT = TXT
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self.domain = domain
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123
self.host = host
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self.rename_count = 0
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125
self.max_renames = max_renames
128
self.protocol = protocol
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126
def rename(self):
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"""Derived from the Avahi example code"""
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if self.rename_count >= self.max_renames:
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129
logger.critical(u"No suitable Zeroconf service name found"
133
130
u" after %i retries, exiting.",
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self.rename_count)
135
raise AvahiServiceError(u"Too many renames")
132
raise AvahiServiceError("Too many renames")
136
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self.name = server.GetAlternativeServiceName(self.name)
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134
logger.info(u"Changing Zeroconf service name to %r ...",
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135
str(self.name))
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syslogger.setFormatter(logging.Formatter
136
syslogger.setFormatter(logging.Formatter\
140
137
('Mandos (%s): %%(levelname)s:'
141
' %%(message)s' % self.name))
138
' %%(message)s' % self.name))
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self.remove()
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self.add()
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self.rename_count += 1
150
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"""Derived from the Avahi example code"""
151
148
global group
152
149
if group is None:
153
group = dbus.Interface(bus.get_object
154
(avahi.DBUS_NAME,
150
group = dbus.Interface\
151
(bus.get_object(avahi.DBUS_NAME,
155
152
server.EntryGroupNew()),
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avahi.DBUS_INTERFACE_ENTRY_GROUP)
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
157
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group.connect_to_signal('StateChanged',
158
155
entry_group_state_changed)
159
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logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
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157
service.name, service.type)
161
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group.AddService(
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self.interface, # interface
163
self.protocol, # protocol
160
avahi.PROTO_INET6, # protocol
164
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dbus.UInt32(0), # flags
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self.name, self.type,
166
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self.domain, self.host,
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# End of Avahi example code
174
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175
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def _datetime_to_dbus(dt, variant_level=0):
177
"""Convert a UTC datetime.datetime() to a D-Bus type."""
178
return dbus.String(dt.isoformat(), variant_level=variant_level)
179
180
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class Client(dbus.service.Object):
173
class Client(object):
182
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"""A representation of a client host served by this server.
183
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Attributes:
184
name: string; from the config file, used in log messages and
185
D-Bus identifiers
176
name: string; from the config file, used in log messages
186
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fingerprint: string (40 or 32 hexadecimal digits); used to
187
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uniquely identify the client
188
secret: bytestring; sent verbatim (over TLS) to client
189
host: string; available for use by the checker command
190
created: datetime.datetime(); (UTC) object creation
191
last_enabled: datetime.datetime(); (UTC)
192
enabled: bool()
193
last_checked_ok: datetime.datetime(); (UTC) or None
194
timeout: datetime.timedelta(); How long from last_checked_ok
195
until this client is invalid
196
interval: datetime.timedelta(); How often to start a new checker
197
disable_hook: If set, called by disable() as disable_hook(self)
198
checker: subprocess.Popen(); a running checker process used
199
to see if the client lives.
200
'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.
201
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checker_initiator_tag: a gobject event source tag, or None
202
disable_initiator_tag: - '' -
191
stop_initiator_tag: - '' -
203
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checker_callback_tag: - '' -
204
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checker_command: string; External command which is run to check if
205
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client lives. %() expansions are done at
206
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runtime with vars(self) as dict, so that for
207
196
instance %(name)s can be used in the command.
208
current_checker_command: string; current running checker_command
209
use_dbus: bool(); Whether to provide D-Bus interface and signals
210
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
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: - '' -
211
202
"""
212
def timeout_milliseconds(self):
213
"Return the 'timeout' attribute in milliseconds"
214
return ((self.timeout.days * 24 * 60 * 60 * 1000)
215
+ (self.timeout.seconds * 1000)
216
+ (self.timeout.microseconds // 1000))
217
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def interval_milliseconds(self):
219
"Return the 'interval' attribute in milliseconds"
220
return ((self.interval.days * 24 * 60 * 60 * 1000)
221
+ (self.interval.seconds * 1000)
222
+ (self.interval.microseconds // 1000))
223
224
def __init__(self, name = None, disable_hook=None, config=None,
225
use_dbus=True):
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):
226
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"""Note: the 'checker' key in 'config' sets the
227
228
'checker_command' attribute and *not* the 'checker'
228
229
attribute."""
229
self.name = name
230
230
if config is None:
231
231
config = {}
232
self.name = name
232
233
logger.debug(u"Creating client %r", self.name)
233
self.use_dbus = False # During __init__
234
234
# Uppercase and remove spaces from fingerprint for later
235
235
# comparison purposes with return value from the fingerprint()
236
236
# function
237
self.fingerprint = (config["fingerprint"].upper()
238
.replace(u" ", u""))
237
self.fingerprint = config["fingerprint"].upper()\
238
.replace(u" ", u"")
239
239
logger.debug(u" Fingerprint: %s", self.fingerprint)
240
240
if "secret" in config:
241
241
self.secret = config["secret"].decode(u"base64")
242
242
elif "secfile" in config:
243
with closing(open(os.path.expanduser
244
(os.path.expandvars
245
(config["secfile"])))) as secfile:
246
self.secret = secfile.read()
243
secfile = open(os.path.expanduser(os.path.expandvars
244
(config["secfile"])))
245
self.secret = secfile.read()
246
secfile.close()
247
247
else:
248
248
raise TypeError(u"No secret or secfile for client %s"
249
249
% self.name)
250
250
self.host = config.get("host", "")
251
self.created = datetime.datetime.utcnow()
252
self.enabled = False
253
self.last_enabled = None
251
self.created = datetime.datetime.now()
254
252
self.last_checked_ok = None
255
253
self.timeout = string_to_delta(config["timeout"])
256
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self.interval = string_to_delta(config["interval"])
257
self.disable_hook = disable_hook
255
self.stop_hook = stop_hook
258
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self.checker = None
259
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self.checker_initiator_tag = None
260
self.disable_initiator_tag = None
258
self.stop_initiator_tag = None
261
259
self.checker_callback_tag = None
262
self.checker_command = config["checker"]
263
self.current_checker_command = None
264
self.last_connect = None
265
# Only now, when this client is initialized, can it show up on
266
# the D-Bus
267
self.use_dbus = use_dbus
268
if self.use_dbus:
269
self.dbus_object_path = (dbus.ObjectPath
270
("/clients/"
271
+ self.name.replace(".", "_")))
272
dbus.service.Object.__init__(self, bus,
273
self.dbus_object_path)
274
275
def enable(self):
260
self.check_command = config["checker"]
261
def start(self):
276
262
"""Start this client's checker and timeout hooks"""
277
self.last_enabled = datetime.datetime.utcnow()
278
263
# Schedule a new checker to be started an 'interval' from now,
279
264
# and every interval from then on.
280
self.checker_initiator_tag = (gobject.timeout_add
281
(self.interval_milliseconds(),
282
self.start_checker))
265
self.checker_initiator_tag = gobject.timeout_add\
266
(self._interval_milliseconds,
267
self.start_checker)
283
268
# Also start a new checker *right now*.
284
269
self.start_checker()
285
# Schedule a disable() when 'timeout' has passed
286
self.disable_initiator_tag = (gobject.timeout_add
287
(self.timeout_milliseconds(),
288
self.disable))
289
self.enabled = True
290
if self.use_dbus:
291
# Emit D-Bus signals
292
self.PropertyChanged(dbus.String(u"enabled"),
293
dbus.Boolean(True, variant_level=1))
294
self.PropertyChanged(dbus.String(u"last_enabled"),
295
(_datetime_to_dbus(self.last_enabled,
296
variant_level=1)))
297
298
def disable(self):
299
"""Disable this client."""
300
if not getattr(self, "enabled", False):
270
# Schedule a stop() when 'timeout' has passed
271
self.stop_initiator_tag = gobject.timeout_add\
272
(self._timeout_milliseconds,
273
self.stop)
274
def stop(self):
275
"""Stop this client.
276
The possibility that a client might be restarted is left open,
277
but not currently used."""
278
# If this client doesn't have a secret, it is already stopped.
279
if hasattr(self, "secret") and self.secret:
280
logger.info(u"Stopping client %s", self.name)
281
self.secret = None
282
else:
301
283
return False
302
logger.info(u"Disabling client %s", self.name)
303
if getattr(self, "disable_initiator_tag", False):
304
gobject.source_remove(self.disable_initiator_tag)
305
self.disable_initiator_tag = None
284
if getattr(self, "stop_initiator_tag", False):
285
gobject.source_remove(self.stop_initiator_tag)
286
self.stop_initiator_tag = None
306
287
if getattr(self, "checker_initiator_tag", False):
307
288
gobject.source_remove(self.checker_initiator_tag)
308
289
self.checker_initiator_tag = None
309
290
self.stop_checker()
310
if self.disable_hook:
311
self.disable_hook(self)
312
self.enabled = False
313
if self.use_dbus:
314
# Emit D-Bus signal
315
self.PropertyChanged(dbus.String(u"enabled"),
316
dbus.Boolean(False, variant_level=1))
291
if self.stop_hook:
292
self.stop_hook(self)
317
293
# Do not run this again if called by a gobject.timeout_add
318
294
return False
319
320
295
def __del__(self):
321
self.disable_hook = None
322
self.disable()
323
324
def checker_callback(self, pid, condition, command):
296
self.stop_hook = None
297
self.stop()
298
def checker_callback(self, pid, condition):
325
299
"""The checker has completed, so take appropriate actions."""
300
now = datetime.datetime.now()
326
301
self.checker_callback_tag = None
327
302
self.checker = None
328
if self.use_dbus:
329
# Emit D-Bus signal
330
self.PropertyChanged(dbus.String(u"checker_running"),
331
dbus.Boolean(False, variant_level=1))
332
if os.WIFEXITED(condition):
333
exitstatus = os.WEXITSTATUS(condition)
334
if exitstatus == 0:
335
logger.info(u"Checker for %(name)s succeeded",
336
vars(self))
337
self.checked_ok()
338
else:
339
logger.info(u"Checker for %(name)s failed",
340
vars(self))
341
if self.use_dbus:
342
# Emit D-Bus signal
343
self.CheckerCompleted(dbus.Int16(exitstatus),
344
dbus.Int64(condition),
345
dbus.String(command))
346
else:
303
if os.WIFEXITED(condition) \
304
and (os.WEXITSTATUS(condition) == 0):
305
logger.info(u"Checker for %(name)s succeeded",
306
vars(self))
307
self.last_checked_ok = now
308
gobject.source_remove(self.stop_initiator_tag)
309
self.stop_initiator_tag = gobject.timeout_add\
310
(self._timeout_milliseconds,
311
self.stop)
312
elif not os.WIFEXITED(condition):
347
313
logger.warning(u"Checker for %(name)s crashed?",
348
314
vars(self))
349
if self.use_dbus:
350
# Emit D-Bus signal
351
self.CheckerCompleted(dbus.Int16(-1),
352
dbus.Int64(condition),
353
dbus.String(command))
354
355
def checked_ok(self):
356
"""Bump up the timeout for this client.
357
This should only be called when the client has been seen,
358
alive and well.
359
"""
360
self.last_checked_ok = datetime.datetime.utcnow()
361
gobject.source_remove(self.disable_initiator_tag)
362
self.disable_initiator_tag = (gobject.timeout_add
363
(self.timeout_milliseconds(),
364
self.disable))
365
if self.use_dbus:
366
# Emit D-Bus signal
367
self.PropertyChanged(
368
dbus.String(u"last_checked_ok"),
369
(_datetime_to_dbus(self.last_checked_ok,
370
variant_level=1)))
371
315
else:
316
logger.info(u"Checker for %(name)s failed",
317
vars(self))
372
318
def start_checker(self):
373
319
"""Start a new checker subprocess if one is not running.
374
320
If a checker already exists, leave it running and do
381
327
# checkers alone, the checker would have to take more time
382
328
# than 'timeout' for the client to be declared invalid, which
383
329
# is as it should be.
384
385
# If a checker exists, make sure it is not a zombie
386
if self.checker is not None:
387
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
388
if pid:
389
logger.warning("Checker was a zombie")
390
gobject.source_remove(self.checker_callback_tag)
391
self.checker_callback(pid, status,
392
self.current_checker_command)
393
# Start a new checker if needed
394
330
if self.checker is None:
395
331
try:
396
# In case checker_command has exactly one % operator
397
command = self.checker_command % self.host
332
# In case check_command has exactly one % operator
333
command = self.check_command % self.host
398
334
except TypeError:
399
335
# Escape attributes for the shell
400
336
escaped_attrs = dict((key, re.escape(str(val)))
401
337
for key, val in
402
338
vars(self).iteritems())
403
339
try:
404
command = self.checker_command % escaped_attrs
340
command = self.check_command % escaped_attrs
405
341
except TypeError, error:
406
342
logger.error(u'Could not format string "%s":'
407
u' %s', self.checker_command, error)
343
u' %s', self.check_command, error)
408
344
return True # Try again later
409
self.current_checker_command = command
410
345
try:
411
346
logger.info(u"Starting checker %r for %s",
412
347
command, self.name)
417
352
self.checker = subprocess.Popen(command,
418
353
close_fds=True,
419
354
shell=True, cwd="/")
420
if self.use_dbus:
421
# Emit D-Bus signal
422
self.CheckerStarted(command)
423
self.PropertyChanged(
424
dbus.String("checker_running"),
425
dbus.Boolean(True, variant_level=1))
426
self.checker_callback_tag = (gobject.child_watch_add
427
(self.checker.pid,
428
self.checker_callback,
429
data=command))
430
# The checker may have completed before the gobject
431
# watch was added. Check for this.
432
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
433
if pid:
434
gobject.source_remove(self.checker_callback_tag)
435
self.checker_callback(pid, status, command)
355
self.checker_callback_tag = gobject.child_watch_add\
356
(self.checker.pid,
357
self.checker_callback)
436
358
except OSError, error:
437
359
logger.error(u"Failed to start subprocess: %s",
438
360
error)
439
361
# Re-run this periodically if run by gobject.timeout_add
440
362
return True
441
442
363
def stop_checker(self):
443
364
"""Force the checker process, if any, to stop."""
444
365
if self.checker_callback_tag:
456
377
if error.errno != errno.ESRCH: # No such process
457
378
raise
458
379
self.checker = None
459
if self.use_dbus:
460
self.PropertyChanged(dbus.String(u"checker_running"),
461
dbus.Boolean(False, variant_level=1))
462
463
380
def still_valid(self):
464
381
"""Has the timeout not yet passed for this client?"""
465
if not getattr(self, "enabled", False):
466
return False
467
now = datetime.datetime.utcnow()
382
now = datetime.datetime.now()
468
383
if self.last_checked_ok is None:
469
384
return now < (self.created + self.timeout)
470
385
else:
471
386
return now < (self.last_checked_ok + self.timeout)
472
473
## D-Bus methods & signals
474
_interface = u"se.bsnet.fukt.Mandos.Client"
475
476
# CheckedOK - method
477
CheckedOK = dbus.service.method(_interface)(checked_ok)
478
CheckedOK.__name__ = "CheckedOK"
479
480
# CheckerCompleted - signal
481
@dbus.service.signal(_interface, signature="nxs")
482
def CheckerCompleted(self, exitcode, waitstatus, command):
483
"D-Bus signal"
484
pass
485
486
# CheckerStarted - signal
487
@dbus.service.signal(_interface, signature="s")
488
def CheckerStarted(self, command):
489
"D-Bus signal"
490
pass
491
492
# GetAllProperties - method
493
@dbus.service.method(_interface, out_signature="a{sv}")
494
def GetAllProperties(self):
495
"D-Bus method"
496
return dbus.Dictionary({
497
dbus.String("name"):
498
dbus.String(self.name, variant_level=1),
499
dbus.String("fingerprint"):
500
dbus.String(self.fingerprint, variant_level=1),
501
dbus.String("host"):
502
dbus.String(self.host, variant_level=1),
503
dbus.String("created"):
504
_datetime_to_dbus(self.created, variant_level=1),
505
dbus.String("last_enabled"):
506
(_datetime_to_dbus(self.last_enabled,
507
variant_level=1)
508
if self.last_enabled is not None
509
else dbus.Boolean(False, variant_level=1)),
510
dbus.String("enabled"):
511
dbus.Boolean(self.enabled, variant_level=1),
512
dbus.String("last_checked_ok"):
513
(_datetime_to_dbus(self.last_checked_ok,
514
variant_level=1)
515
if self.last_checked_ok is not None
516
else dbus.Boolean (False, variant_level=1)),
517
dbus.String("timeout"):
518
dbus.UInt64(self.timeout_milliseconds(),
519
variant_level=1),
520
dbus.String("interval"):
521
dbus.UInt64(self.interval_milliseconds(),
522
variant_level=1),
523
dbus.String("checker"):
524
dbus.String(self.checker_command,
525
variant_level=1),
526
dbus.String("checker_running"):
527
dbus.Boolean(self.checker is not None,
528
variant_level=1),
529
dbus.String("object_path"):
530
dbus.ObjectPath(self.dbus_object_path,
531
variant_level=1)
532
}, signature="sv")
533
534
# IsStillValid - method
535
IsStillValid = (dbus.service.method(_interface, out_signature="b")
536
(still_valid))
537
IsStillValid.__name__ = "IsStillValid"
538
539
# PropertyChanged - signal
540
@dbus.service.signal(_interface, signature="sv")
541
def PropertyChanged(self, property, value):
542
"D-Bus signal"
543
pass
544
545
# SetChecker - method
546
@dbus.service.method(_interface, in_signature="s")
547
def SetChecker(self, checker):
548
"D-Bus setter method"
549
self.checker_command = checker
550
# Emit D-Bus signal
551
self.PropertyChanged(dbus.String(u"checker"),
552
dbus.String(self.checker_command,
553
variant_level=1))
554
555
# SetHost - method
556
@dbus.service.method(_interface, in_signature="s")
557
def SetHost(self, host):
558
"D-Bus setter method"
559
self.host = host
560
# Emit D-Bus signal
561
self.PropertyChanged(dbus.String(u"host"),
562
dbus.String(self.host, variant_level=1))
563
564
# SetInterval - method
565
@dbus.service.method(_interface, in_signature="t")
566
def SetInterval(self, milliseconds):
567
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
568
# Emit D-Bus signal
569
self.PropertyChanged(dbus.String(u"interval"),
570
(dbus.UInt64(self.interval_milliseconds(),
571
variant_level=1)))
572
573
# SetSecret - method
574
@dbus.service.method(_interface, in_signature="ay",
575
byte_arrays=True)
576
def SetSecret(self, secret):
577
"D-Bus setter method"
578
self.secret = str(secret)
579
580
# SetTimeout - method
581
@dbus.service.method(_interface, in_signature="t")
582
def SetTimeout(self, milliseconds):
583
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
584
# Emit D-Bus signal
585
self.PropertyChanged(dbus.String(u"timeout"),
586
(dbus.UInt64(self.timeout_milliseconds(),
587
variant_level=1)))
588
589
# Enable - method
590
Enable = dbus.service.method(_interface)(enable)
591
Enable.__name__ = "Enable"
592
593
# StartChecker - method
594
@dbus.service.method(_interface)
595
def StartChecker(self):
596
"D-Bus method"
597
self.start_checker()
598
599
# Disable - method
600
@dbus.service.method(_interface)
601
def Disable(self):
602
"D-Bus method"
603
self.disable()
604
605
# StopChecker - method
606
StopChecker = dbus.service.method(_interface)(stop_checker)
607
StopChecker.__name__ = "StopChecker"
608
609
del _interface
610
387
611
388
612
389
def peer_certificate(session):
613
390
"Return the peer's OpenPGP certificate as a bytestring"
614
391
# If not an OpenPGP certificate...
615
if (gnutls.library.functions
616
.gnutls_certificate_type_get(session._c_object)
617
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
392
if gnutls.library.functions.gnutls_certificate_type_get\
393
(session._c_object) \
394
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
618
395
# ...do the normal thing
619
396
return session.peer_certificate
620
list_size = ctypes.c_uint(1)
621
cert_list = (gnutls.library.functions
622
.gnutls_certificate_get_peers
623
(session._c_object, ctypes.byref(list_size)))
624
if not bool(cert_list) and list_size.value != 0:
625
raise gnutls.errors.GNUTLSError("error getting peer"
626
" certificate")
397
list_size = ctypes.c_uint()
398
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
399
(session._c_object, ctypes.byref(list_size))
627
400
if list_size.value == 0:
628
401
return None
629
402
cert = cert_list[0]
633
406
def fingerprint(openpgp):
634
407
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
635
408
# New GnuTLS "datum" with the OpenPGP public key
636
datum = (gnutls.library.types
637
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
638
ctypes.POINTER
639
(ctypes.c_ubyte)),
640
ctypes.c_uint(len(openpgp))))
409
datum = gnutls.library.types.gnutls_datum_t\
410
(ctypes.cast(ctypes.c_char_p(openpgp),
411
ctypes.POINTER(ctypes.c_ubyte)),
412
ctypes.c_uint(len(openpgp)))
641
413
# New empty GnuTLS certificate
642
414
crt = gnutls.library.types.gnutls_openpgp_crt_t()
643
(gnutls.library.functions
644
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
415
gnutls.library.functions.gnutls_openpgp_crt_init\
416
(ctypes.byref(crt))
645
417
# Import the OpenPGP public key into the certificate
646
(gnutls.library.functions
647
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
648
gnutls.library.constants
649
.GNUTLS_OPENPGP_FMT_RAW))
418
gnutls.library.functions.gnutls_openpgp_crt_import\
419
(crt, ctypes.byref(datum),
420
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
650
421
# Verify the self signature in the key
651
422
crtverify = ctypes.c_uint()
652
(gnutls.library.functions
653
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
423
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
424
(crt, 0, ctypes.byref(crtverify))
654
425
if crtverify.value != 0:
655
426
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
656
427
raise gnutls.errors.CertificateSecurityError("Verify failed")
658
429
buf = ctypes.create_string_buffer(20)
659
430
buf_len = ctypes.c_size_t()
660
431
# Get the fingerprint from the certificate into the buffer
661
(gnutls.library.functions
662
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
663
ctypes.byref(buf_len)))
432
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
433
(crt, ctypes.byref(buf), ctypes.byref(buf_len))
664
434
# Deinit the certificate
665
435
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
666
436
# Convert the buffer to a Python bytestring
677
447
678
448
def handle(self):
679
449
logger.info(u"TCP connection from: %s",
680
unicode(self.client_address))
681
session = (gnutls.connection
682
.ClientSession(self.request,
683
gnutls.connection
684
.X509Credentials()))
450
unicode(self.client_address))
451
session = gnutls.connection.ClientSession\
452
(self.request, gnutls.connection.X509Credentials())
685
453
686
454
line = self.request.makefile().readline()
687
455
logger.debug(u"Protocol version: %r", line)
698
466
# using OpenPGP certificates.
699
467
700
468
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
701
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
702
# "+DHE-DSS"))
703
# Use a fallback default, since this MUST be set.
704
priority = self.server.settings.get("priority", "NORMAL")
705
(gnutls.library.functions
706
.gnutls_priority_set_direct(session._c_object,
707
priority, None))
469
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
470
# "+DHE-DSS"))
471
priority = "NORMAL" # Fallback default, since this
472
# MUST be set.
473
if self.server.settings["priority"]:
474
priority = self.server.settings["priority"]
475
gnutls.library.functions.gnutls_priority_set_direct\
476
(session._c_object, priority, None)
708
477
709
478
try:
710
479
session.handshake()
713
482
# Do not run session.bye() here: the session is not
714
483
# established. Just abandon the request.
715
484
return
716
logger.debug(u"Handshake succeeded")
717
485
try:
718
486
fpr = fingerprint(peer_certificate(session))
719
487
except (TypeError, gnutls.errors.GNUTLSError), error:
721
489
session.bye()
722
490
return
723
491
logger.debug(u"Fingerprint: %s", fpr)
724
492
client = None
725
493
for c in self.server.clients:
726
494
if c.fingerprint == fpr:
727
495
client = c
728
496
break
729
else:
497
if not client:
730
498
logger.warning(u"Client not found for fingerprint: %s",
731
499
fpr)
732
500
session.bye()
739
507
vars(client))
740
508
session.bye()
741
509
return
742
## This won't work here, since we're in a fork.
743
# client.checked_ok()
744
510
sent_size = 0
745
511
while sent_size < len(client.secret):
746
512
sent = session.send(client.secret[sent_size:])
751
517
session.bye()
752
518
753
519
754
class IPv6_TCPServer(SocketServer.ForkingMixIn,
755
SocketServer.TCPServer, object):
756
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
520
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
521
"""IPv6 TCP server. Accepts 'None' as address and/or port.
757
522
Attributes:
758
523
settings: Server settings
759
524
clients: Set() of Client objects
767
532
if "clients" in kwargs:
768
533
self.clients = kwargs["clients"]
769
534
del kwargs["clients"]
770
if "use_ipv6" in kwargs:
771
if not kwargs["use_ipv6"]:
772
self.address_family = socket.AF_INET
773
del kwargs["use_ipv6"]
774
535
self.enabled = False
775
536
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
776
537
def server_bind(self):
790
551
u" bind to interface %s",
791
552
self.settings["interface"])
792
553
else:
793
raise
554
raise error
794
555
# Only bind(2) the socket if we really need to.
795
556
if self.server_address[0] or self.server_address[1]:
796
557
if not self.server_address[0]:
797
if self.address_family == socket.AF_INET6:
798
any_address = "::" # in6addr_any
799
else:
800
any_address = socket.INADDR_ANY
801
self.server_address = (any_address,
558
in6addr_any = "::"
559
self.server_address = (in6addr_any,
802
560
self.server_address[1])
803
561
elif not self.server_address[1]:
804
562
self.server_address = (self.server_address[0],
820
578
821
579
def string_to_delta(interval):
822
580
"""Parse a string and return a datetime.timedelta
823
581
824
582
>>> string_to_delta('7d')
825
583
datetime.timedelta(7)
826
584
>>> string_to_delta('60s')
878
636
elif state == avahi.ENTRY_GROUP_FAILURE:
879
637
logger.critical(u"Avahi: Error in group state changed %s",
880
638
unicode(error))
881
raise AvahiGroupError(u"State changed: %s" % unicode(error))
639
raise AvahiGroupError("State changed: %s", str(error))
882
640
883
641
def if_nametoindex(interface):
884
642
"""Call the C function if_nametoindex(), or equivalent"""
885
643
global if_nametoindex
886
644
try:
887
if_nametoindex = (ctypes.cdll.LoadLibrary
888
(ctypes.util.find_library("c"))
889
.if_nametoindex)
645
if_nametoindex = ctypes.cdll.LoadLibrary\
646
(ctypes.util.find_library("c")).if_nametoindex
890
647
except (OSError, AttributeError):
891
648
if "struct" not in sys.modules:
892
649
import struct
895
652
def if_nametoindex(interface):
896
653
"Get an interface index the hard way, i.e. using fcntl()"
897
654
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
898
with closing(socket.socket()) as s:
899
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
900
struct.pack("16s16x", interface))
655
s = socket.socket()
656
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
657
struct.pack("16s16x", interface))
658
s.close()
901
659
interface_index = struct.unpack("I", ifreq[16:20])[0]
902
660
return interface_index
903
661
return if_nametoindex(interface)
927
685
928
686
929
687
def main():
930
parser = optparse.OptionParser(version = "%%prog %s" % version)
688
parser = OptionParser(version = "%%prog %s" % version)
931
689
parser.add_option("-i", "--interface", type="string",
932
690
metavar="IF", help="Bind to interface IF")
933
691
parser.add_option("-a", "--address", type="string",
934
692
help="Address to listen for requests on")
935
693
parser.add_option("-p", "--port", type="int",
936
694
help="Port number to receive requests on")
937
parser.add_option("--check", action="store_true",
695
parser.add_option("--check", action="store_true", default=False,
938
696
help="Run self-test")
939
697
parser.add_option("--debug", action="store_true",
940
698
help="Debug mode; run in foreground and log to"
947
705
default="/etc/mandos", metavar="DIR",
948
706
help="Directory to search for configuration"
949
707
" files")
950
parser.add_option("--no-dbus", action="store_false",
951
dest="use_dbus",
952
help="Do not provide D-Bus system bus"
953
" interface")
954
parser.add_option("--no-ipv6", action="store_false",
955
dest="use_ipv6", help="Do not use IPv6")
956
708
options = parser.parse_args()[0]
957
709
958
710
if options.check:
968
720
"priority":
969
721
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
970
722
"servicename": "Mandos",
971
"use_dbus": "True",
972
"use_ipv6": "True",
973
723
}
974
724
975
725
# Parse config file for server-global settings
978
728
server_config.read(os.path.join(options.configdir, "mandos.conf"))
979
729
# Convert the SafeConfigParser object to a dict
980
730
server_settings = server_config.defaults()
981
# Use the appropriate methods on the non-string config options
982
server_settings["debug"] = server_config.getboolean("DEFAULT",
983
"debug")
984
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
985
"use_dbus")
986
server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
987
"use_ipv6")
988
if server_settings["port"]:
989
server_settings["port"] = server_config.getint("DEFAULT",
990
"port")
731
# Use getboolean on the boolean config option
732
server_settings["debug"] = server_config.getboolean\
733
("DEFAULT", "debug")
991
734
del server_config
992
735
993
736
# Override the settings from the config file with command line
994
737
# options, if set.
995
738
for option in ("interface", "address", "port", "debug",
996
"priority", "servicename", "configdir",
997
"use_dbus", "use_ipv6"):
739
"priority", "servicename", "configdir"):
998
740
value = getattr(options, option)
999
741
if value is not None:
1000
742
server_settings[option] = value
1001
743
del options
1002
744
# Now we have our good server settings in "server_settings"
1003
745
1004
# For convenience
1005
746
debug = server_settings["debug"]
1006
use_dbus = server_settings["use_dbus"]
1007
use_ipv6 = server_settings["use_ipv6"]
1008
747
1009
748
if not debug:
1010
749
syslogger.setLevel(logging.WARNING)
1011
750
console.setLevel(logging.WARNING)
1012
751
1013
752
if server_settings["servicename"] != "Mandos":
1014
syslogger.setFormatter(logging.Formatter
753
syslogger.setFormatter(logging.Formatter\
1015
754
('Mandos (%s): %%(levelname)s:'
1016
755
' %%(message)s'
1017
756
% server_settings["servicename"]))
1019
758
# Parse config file with clients
1020
759
client_defaults = { "timeout": "1h",
1021
760
"interval": "5m",
1022
"checker": "fping -q -- %%(host)s",
761
"checker": "fping -q -- %(host)s",
1023
762
"host": "",
1024
763
}
1025
764
client_config = ConfigParser.SafeConfigParser(client_defaults)
1031
770
server_settings["port"]),
1032
771
TCP_handler,
1033
772
settings=server_settings,
1034
clients=clients, use_ipv6=use_ipv6)
773
clients=clients)
1035
774
pidfilename = "/var/run/mandos.pid"
1036
775
try:
1037
776
pidfile = open(pidfilename, "w")
1038
except IOError:
777
except IOError, error:
1039
778
logger.error("Could not open file %r", pidfilename)
1040
779
1041
try:
1042
uid = pwd.getpwnam("_mandos").pw_uid
1043
gid = pwd.getpwnam("_mandos").pw_gid
1044
except KeyError:
1045
try:
1046
uid = pwd.getpwnam("mandos").pw_uid
1047
gid = pwd.getpwnam("mandos").pw_gid
1048
except KeyError:
1049
try:
1050
uid = pwd.getpwnam("nobody").pw_uid
1051
gid = pwd.getpwnam("nogroup").pw_gid
1052
except KeyError:
1053
uid = 65534
1054
gid = 65534
1055
try:
780
uid = 65534
781
gid = 65534
782
try:
783
uid = pwd.getpwnam("mandos").pw_uid
784
except KeyError:
785
try:
786
uid = pwd.getpwnam("nobody").pw_uid
787
except KeyError:
788
pass
789
try:
790
gid = pwd.getpwnam("mandos").pw_gid
791
except KeyError:
792
try:
793
gid = pwd.getpwnam("nogroup").pw_gid
794
except KeyError:
795
pass
796
try:
797
os.setuid(uid)
1056
798
os.setgid(gid)
1057
os.setuid(uid)
1058
799
except OSError, error:
1059
800
if error[0] != errno.EPERM:
1060
801
raise error
1061
802
1062
# Enable all possible GnuTLS debugging
1063
if debug:
1064
# "Use a log level over 10 to enable all debugging options."
1065
# - GnuTLS manual
1066
gnutls.library.functions.gnutls_global_set_log_level(11)
1067
1068
@gnutls.library.types.gnutls_log_func
1069
def debug_gnutls(level, string):
1070
logger.debug("GnuTLS: %s", string[:-1])
1071
1072
(gnutls.library.functions
1073
.gnutls_global_set_log_function(debug_gnutls))
1074
1075
803
global service
1076
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1077
804
service = AvahiService(name = server_settings["servicename"],
1078
servicetype = "_mandos._tcp",
1079
protocol = protocol)
805
servicetype = "_mandos._tcp", )
1080
806
if server_settings["interface"]:
1081
service.interface = (if_nametoindex
1082
(server_settings["interface"]))
807
service.interface = if_nametoindex\
808
(server_settings["interface"])
1083
809
1084
810
global main_loop
1085
811
global bus
1092
818
avahi.DBUS_PATH_SERVER),
1093
819
avahi.DBUS_INTERFACE_SERVER)
1094
820
# End of Avahi example code
1095
if use_dbus:
1096
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
821
822
def remove_from_clients(client):
823
clients.remove(client)
824
if not clients:
825
logger.critical(u"No clients left, exiting")
826
sys.exit()
1097
827
1098
828
clients.update(Set(Client(name = section,
829
stop_hook = remove_from_clients,
1099
830
config
1100
= dict(client_config.items(section)),
1101
use_dbus = use_dbus)
831
= dict(client_config.items(section)))
1102
832
for section in client_config.sections()))
1103
833
if not clients:
1104
logger.warning(u"No clients defined")
834
logger.critical(u"No clients defined")
835
sys.exit(1)
1105
836
1106
837
if debug:
1107
838
# Redirect stdin so all checkers get /dev/null
1139
870
1140
871
while clients:
1141
872
client = clients.pop()
1142
client.disable_hook = None
1143
client.disable()
873
client.stop_hook = None
874
client.stop()
1144
875
1145
876
atexit.register(cleanup)
1146
877
1149
880
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1150
881
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1151
882
1152
if use_dbus:
1153
class MandosServer(dbus.service.Object):
1154
"""A D-Bus proxy object"""
1155
def __init__(self):
1156
dbus.service.Object.__init__(self, bus, "/")
1157
_interface = u"se.bsnet.fukt.Mandos"
1158
1159
@dbus.service.signal(_interface, signature="oa{sv}")
1160
def ClientAdded(self, objpath, properties):
1161
"D-Bus signal"
1162
pass
1163
1164
@dbus.service.signal(_interface, signature="os")
1165
def ClientRemoved(self, objpath, name):
1166
"D-Bus signal"
1167
pass
1168
1169
@dbus.service.method(_interface, out_signature="ao")
1170
def GetAllClients(self):
1171
"D-Bus method"
1172
return dbus.Array(c.dbus_object_path for c in clients)
1173
1174
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1175
def GetAllClientsWithProperties(self):
1176
"D-Bus method"
1177
return dbus.Dictionary(
1178
((c.dbus_object_path, c.GetAllProperties())
1179
for c in clients),
1180
signature="oa{sv}")
1181
1182
@dbus.service.method(_interface, in_signature="o")
1183
def RemoveClient(self, object_path):
1184
"D-Bus method"
1185
for c in clients:
1186
if c.dbus_object_path == object_path:
1187
clients.remove(c)
1188
# Don't signal anything except ClientRemoved
1189
c.use_dbus = False
1190
c.disable()
1191
# Emit D-Bus signal
1192
self.ClientRemoved(object_path, c.name)
1193
return
1194
raise KeyError
1195
1196
del _interface
1197
1198
mandos_server = MandosServer()
1199
1200
883
for client in clients:
1201
if use_dbus:
1202
# Emit D-Bus signal
1203
mandos_server.ClientAdded(client.dbus_object_path,
1204
client.GetAllProperties())
1205
client.enable()
884
client.start()
1206
885
1207
886
tcp_server.enable()
1208
887
tcp_server.server_activate()
1209
888
1210
889
# Find out what port we got
1211
890
service.port = tcp_server.socket.getsockname()[1]
1212
if use_ipv6:
1213
logger.info(u"Now listening on address %r, port %d,"
1214
" flowinfo %d, scope_id %d"
1215
% tcp_server.socket.getsockname())
1216
else: # IPv4
1217
logger.info(u"Now listening on address %r, port %d"
1218
% tcp_server.socket.getsockname())
891
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
892
u" scope_id %d" % tcp_server.socket.getsockname())
1219
893
1220
894
#service.interface = tcp_server.socket.getsockname()[3]
1221
895
1231
905
1232
906
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1233
907
lambda *args, **kwargs:
1234
(tcp_server.handle_request
1235
(*args[2:], **kwargs) or True))
908
tcp_server.handle_request\
909
(*args[2:], **kwargs) or True)
1236
910
1237
911
logger.debug(u"Starting main loop")
1238
912
main_loop.run()
1239
913
except AvahiError, error:
1240
logger.critical(u"AvahiError: %s", error)
914
logger.critical(u"AvahiError: %s" + unicode(error))
1241
915
sys.exit(1)
1242
916
except KeyboardInterrupt:
1243
917
if debug:
1244
print >> sys.stderr
1245
logger.debug("Server received KeyboardInterrupt")
1246
logger.debug("Server exiting")
918
print
1247
919
1248
920
if __name__ == '__main__':
1249
921
main()
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Version: 2.0.2.dev0