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- Committer: Björn Påhlsson
- Date: 2008-07-20 02:52:20 UTC
- Revision ID: belorn@braxen-20080720025220-r5u0388uy9iu23h6
Added following support:
Pluginbased client handler
rewritten Mandos client
Avahi instead of udp server discovery
openpgp encrypted key support
Passprompt stand alone application for direct console input
Added logging for Mandos server
Pluginbased client handler
rewritten Mandos client
Avahi instead of udp server discovery
openpgp encrypted key support
Passprompt stand alone application for direct console input
Added logging for Mandos server
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- clients.conf => mandos-clients.conf
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
1
1
#!/usr/bin/python
2
# -*- mode: python; coding: utf-8 -*-
3
#
4
# Mandos server - give out binary blobs to connecting clients.
5
#
6
# This program is partly derived from an example program for an Avahi
7
# service publisher, downloaded from
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
#
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
19
# the Free Software Foundation, either version 3 of the License, or
20
# (at your option) any later version.
21
#
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
# GNU General Public License for more details.
26
#
27
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
33
2
34
from __future__ import division, with_statement, absolute_import
3
from __future__ import division
35
4
36
5
import SocketServer
37
6
import socket
38
import optparse
7
import select
8
from optparse import OptionParser
39
9
import datetime
40
10
import errno
41
11
import gnutls.crypto
51
21
import signal
52
22
from sets import Set
53
23
import subprocess
54
import atexit
55
import stat
56
import logging
57
import logging.handlers
58
import pwd
59
from contextlib import closing
60
24
61
25
import dbus
62
import dbus.service
63
26
import gobject
64
27
import avahi
65
28
from dbus.mainloop.glib import DBusGMainLoop
66
29
import ctypes
67
import ctypes.util
68
69
version = "1.0.5"
30
31
import logging
32
import logging.handlers
33
34
# logghandler.setFormatter(logging.Formatter('%(levelname)s %(message)s')
70
35
71
36
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: %(levelname)s: %(message)s'))
77
logger.addHandler(syslogger)
78
79
console = logging.StreamHandler()
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
81
' %(message)s'))
82
logger.addHandler(console)
83
84
class AvahiError(Exception):
85
def __init__(self, value, *args, **kwargs):
86
self.value = value
87
super(AvahiError, self).__init__(value, *args, **kwargs)
88
def __unicode__(self):
89
return unicode(repr(self.value))
90
91
class AvahiServiceError(AvahiError):
92
pass
93
94
class AvahiGroupError(AvahiError):
95
pass
96
97
98
class AvahiService(object):
99
"""An Avahi (Zeroconf) service.
100
Attributes:
101
interface: integer; avahi.IF_UNSPEC or an interface index.
102
Used to optionally bind to the specified interface.
103
name: string; Example: 'Mandos'
104
type: string; Example: '_mandos._tcp'.
105
See <http://www.dns-sd.org/ServiceTypes.html>
106
port: integer; what port to announce
107
TXT: list of strings; TXT record for the service
108
domain: string; Domain to publish on, default to .local if empty.
109
host: string; Host to publish records for, default is localhost
110
max_renames: integer; maximum number of renames
111
rename_count: integer; counter so we only rename after collisions
112
a sensible number of times
113
"""
114
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
servicetype = None, port = None, TXT = None,
116
domain = "", host = "", max_renames = 32768):
117
self.interface = interface
118
self.name = name
119
self.type = servicetype
120
self.port = port
121
self.TXT = TXT if TXT is not None else []
122
self.domain = domain
123
self.host = host
124
self.rename_count = 0
125
self.max_renames = max_renames
126
def rename(self):
127
"""Derived from the Avahi example code"""
128
if self.rename_count >= self.max_renames:
129
logger.critical(u"No suitable Zeroconf service name found"
130
u" after %i retries, exiting.",
131
self.rename_count)
132
raise AvahiServiceError(u"Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
134
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
136
syslogger.setFormatter(logging.Formatter
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
139
self.remove()
140
self.add()
141
self.rename_count += 1
142
def remove(self):
143
"""Derived from the Avahi example code"""
144
if group is not None:
145
group.Reset()
146
def add(self):
147
"""Derived from the Avahi example code"""
148
global group
149
if group is None:
150
group = dbus.Interface(bus.get_object
151
(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
37
logger.addHandler(logging.handlers.SysLogHandler(facility = logging.handlers.SysLogHandler.LOG_DAEMON))
38
39
# This variable is used to optionally bind to a specified interface.
40
# It is a global variable to fit in with the other variables from the
41
# Avahi server example code.
42
serviceInterface = avahi.IF_UNSPEC
43
# From the Avahi server example code:
44
serviceName = "Mandos"
45
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
46
servicePort = None # Not known at startup
47
serviceTXT = [] # TXT record for the service
48
domain = "" # Domain to publish on, default to .local
49
host = "" # Host to publish records for, default to localhost
50
group = None #our entry group
51
rename_count = 12 # Counter so we only rename after collisions a
52
# sensible number of times
170
53
# End of Avahi example code
171
54
172
55
173
def _datetime_to_dbus(dt, variant_level=0):
174
"""Convert a UTC datetime.datetime() to a D-Bus type."""
175
return dbus.String(dt.isoformat(), variant_level=variant_level)
176
177
178
class Client(dbus.service.Object):
56
class Client(object):
179
57
"""A representation of a client host served by this server.
180
58
Attributes:
181
name: string; from the config file, used in log messages and
182
D-Bus identifiers
59
name: string; from the config file, used in log messages
183
60
fingerprint: string (40 or 32 hexadecimal digits); used to
184
61
uniquely identify the client
185
secret: bytestring; sent verbatim (over TLS) to client
186
host: string; available for use by the checker command
187
created: datetime.datetime(); (UTC) object creation
188
last_enabled: datetime.datetime(); (UTC)
189
enabled: bool()
190
last_checked_ok: datetime.datetime(); (UTC) or None
191
timeout: datetime.timedelta(); How long from last_checked_ok
192
until this client is invalid
193
interval: datetime.timedelta(); How often to start a new checker
194
disable_hook: If set, called by disable() as disable_hook(self)
195
checker: subprocess.Popen(); a running checker process used
196
to see if the client lives.
197
'None' if no process is running.
62
secret: bytestring; sent verbatim (over TLS) to client
63
fqdn: string (FQDN); available for use by the checker command
64
created: datetime.datetime()
65
last_seen: datetime.datetime() or None if not yet seen
66
timeout: datetime.timedelta(); How long from last_seen until
67
this client is invalid
68
interval: datetime.timedelta(); How often to start a new checker
69
stop_hook: If set, called by stop() as stop_hook(self)
70
checker: subprocess.Popen(); a running checker process used
71
to see if the client lives.
72
Is None if no process is running.
198
73
checker_initiator_tag: a gobject event source tag, or None
199
disable_initiator_tag: - '' -
74
stop_initiator_tag: - '' -
200
75
checker_callback_tag: - '' -
201
76
checker_command: string; External command which is run to check if
202
client lives. %() expansions are done at
77
client lives. %()s expansions are done at
203
78
runtime with vars(self) as dict, so that for
204
79
instance %(name)s can be used in the command.
205
use_dbus: bool(); Whether to provide D-Bus interface and signals
206
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
80
Private attibutes:
81
_timeout: Real variable for 'timeout'
82
_interval: Real variable for 'interval'
83
_timeout_milliseconds: Used by gobject.timeout_add()
84
_interval_milliseconds: - '' -
207
85
"""
208
def timeout_milliseconds(self):
209
"Return the 'timeout' attribute in milliseconds"
210
return ((self.timeout.days * 24 * 60 * 60 * 1000)
211
+ (self.timeout.seconds * 1000)
212
+ (self.timeout.microseconds // 1000))
213
214
def interval_milliseconds(self):
215
"Return the 'interval' attribute in milliseconds"
216
return ((self.interval.days * 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds * 1000)
218
+ (self.interval.microseconds // 1000))
219
220
def __init__(self, name = None, disable_hook=None, config=None,
221
use_dbus=True):
222
"""Note: the 'checker' key in 'config' sets the
223
'checker_command' attribute and *not* the 'checker'
224
attribute."""
86
def _set_timeout(self, timeout):
87
"Setter function for 'timeout' attribute"
88
self._timeout = timeout
89
self._timeout_milliseconds = ((self.timeout.days
90
* 24 * 60 * 60 * 1000)
91
+ (self.timeout.seconds * 1000)
92
+ (self.timeout.microseconds
93
// 1000))
94
timeout = property(lambda self: self._timeout,
95
_set_timeout)
96
del _set_timeout
97
def _set_interval(self, interval):
98
"Setter function for 'interval' attribute"
99
self._interval = interval
100
self._interval_milliseconds = ((self.interval.days
101
* 24 * 60 * 60 * 1000)
102
+ (self.interval.seconds
103
* 1000)
104
+ (self.interval.microseconds
105
// 1000))
106
interval = property(lambda self: self._interval,
107
_set_interval)
108
del _set_interval
109
def __init__(self, name=None, options=None, stop_hook=None,
110
fingerprint=None, secret=None, secfile=None, fqdn=None,
111
timeout=None, interval=-1, checker=None):
225
112
self.name = name
226
if config is None:
227
config = {}
228
logger.debug(u"Creating client %r", self.name)
229
self.use_dbus = False # During __init__
230
# Uppercase and remove spaces from fingerprint for later
231
# comparison purposes with return value from the fingerprint()
232
# function
233
self.fingerprint = (config["fingerprint"].upper()
234
.replace(u" ", u""))
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
236
if "secret" in config:
237
self.secret = config["secret"].decode(u"base64")
238
elif "secfile" in config:
239
with closing(open(os.path.expanduser
240
(os.path.expandvars
241
(config["secfile"])))) as secfile:
242
self.secret = secfile.read()
243
else:
244
raise TypeError(u"No secret or secfile for client %s"
245
% self.name)
246
self.host = config.get("host", "")
247
self.created = datetime.datetime.utcnow()
248
self.enabled = False
249
self.last_enabled = None
250
self.last_checked_ok = None
251
self.timeout = string_to_delta(config["timeout"])
252
self.interval = string_to_delta(config["interval"])
253
self.disable_hook = disable_hook
113
# Uppercase and remove spaces from fingerprint
114
# for later comparison purposes with return value of
115
# the fingerprint() function
116
self.fingerprint = fingerprint.upper().replace(u" ", u"")
117
if secret:
118
self.secret = secret.decode(u"base64")
119
elif secfile:
120
sf = open(secfile)
121
self.secret = sf.read()
122
sf.close()
123
else:
124
raise RuntimeError(u"No secret or secfile for client %s"
125
% self.name)
126
self.fqdn = fqdn # string
127
self.created = datetime.datetime.now()
128
self.last_seen = None
129
if timeout is None:
130
timeout = options.timeout
131
self.timeout = timeout
132
if interval == -1:
133
interval = options.interval
134
else:
135
interval = string_to_delta(interval)
136
self.interval = interval
137
self.stop_hook = stop_hook
254
138
self.checker = None
255
139
self.checker_initiator_tag = None
256
self.disable_initiator_tag = None
140
self.stop_initiator_tag = None
257
141
self.checker_callback_tag = None
258
self.checker_command = config["checker"]
259
self.last_connect = None
260
# Only now, when this client is initialized, can it show up on
261
# the D-Bus
262
self.use_dbus = use_dbus
263
if self.use_dbus:
264
self.dbus_object_path = (dbus.ObjectPath
265
("/clients/"
266
+ self.name.replace(".", "_")))
267
dbus.service.Object.__init__(self, bus,
268
self.dbus_object_path)
269
270
def enable(self):
271
"""Start this client's checker and timeout hooks"""
272
self.last_enabled = datetime.datetime.utcnow()
142
self.check_command = checker
143
def start(self):
144
"""Start this clients checker and timeout hooks"""
273
145
# Schedule a new checker to be started an 'interval' from now,
274
146
# and every interval from then on.
275
self.checker_initiator_tag = (gobject.timeout_add
276
(self.interval_milliseconds(),
277
self.start_checker))
147
self.checker_initiator_tag = gobject.timeout_add\
148
(self._interval_milliseconds,
149
self.start_checker)
278
150
# Also start a new checker *right now*.
279
151
self.start_checker()
280
# Schedule a disable() when 'timeout' has passed
281
self.disable_initiator_tag = (gobject.timeout_add
282
(self.timeout_milliseconds(),
283
self.disable))
284
self.enabled = True
285
if self.use_dbus:
286
# Emit D-Bus signals
287
self.PropertyChanged(dbus.String(u"enabled"),
288
dbus.Boolean(True, variant_level=1))
289
self.PropertyChanged(dbus.String(u"last_enabled"),
290
(_datetime_to_dbus(self.last_enabled,
291
variant_level=1)))
292
293
def disable(self):
294
"""Disable this client."""
295
if not getattr(self, "enabled", False):
296
return False
297
logger.info(u"Disabling client %s", self.name)
298
if getattr(self, "disable_initiator_tag", False):
299
gobject.source_remove(self.disable_initiator_tag)
300
self.disable_initiator_tag = None
301
if getattr(self, "checker_initiator_tag", False):
152
# Schedule a stop() when 'timeout' has passed
153
self.stop_initiator_tag = gobject.timeout_add\
154
(self._timeout_milliseconds,
155
self.stop)
156
def stop(self):
157
"""Stop this client.
158
The possibility that this client might be restarted is left
159
open, but not currently used."""
160
logger.debug(u"Stopping client %s", self.name)
161
self.secret = None
162
if self.stop_initiator_tag:
163
gobject.source_remove(self.stop_initiator_tag)
164
self.stop_initiator_tag = None
165
if self.checker_initiator_tag:
302
166
gobject.source_remove(self.checker_initiator_tag)
303
167
self.checker_initiator_tag = None
304
168
self.stop_checker()
305
if self.disable_hook:
306
self.disable_hook(self)
307
self.enabled = False
308
if self.use_dbus:
309
# Emit D-Bus signal
310
self.PropertyChanged(dbus.String(u"enabled"),
311
dbus.Boolean(False, variant_level=1))
169
if self.stop_hook:
170
self.stop_hook(self)
312
171
# Do not run this again if called by a gobject.timeout_add
313
172
return False
314
315
173
def __del__(self):
316
self.disable_hook = None
317
self.disable()
318
319
def checker_callback(self, pid, condition, command):
174
# Some code duplication here and in stop()
175
if hasattr(self, "stop_initiator_tag") \
176
and self.stop_initiator_tag:
177
gobject.source_remove(self.stop_initiator_tag)
178
self.stop_initiator_tag = None
179
if hasattr(self, "checker_initiator_tag") \
180
and self.checker_initiator_tag:
181
gobject.source_remove(self.checker_initiator_tag)
182
self.checker_initiator_tag = None
183
self.stop_checker()
184
def checker_callback(self, pid, condition):
320
185
"""The checker has completed, so take appropriate actions."""
321
self.checker_callback_tag = None
322
self.checker = None
323
if self.use_dbus:
324
# Emit D-Bus signal
325
self.PropertyChanged(dbus.String(u"checker_running"),
326
dbus.Boolean(False, variant_level=1))
327
if os.WIFEXITED(condition):
328
exitstatus = os.WEXITSTATUS(condition)
329
if exitstatus == 0:
330
logger.info(u"Checker for %(name)s succeeded",
331
vars(self))
332
self.checked_ok()
333
else:
334
logger.info(u"Checker for %(name)s failed",
335
vars(self))
336
if self.use_dbus:
337
# Emit D-Bus signal
338
self.CheckerCompleted(dbus.Int16(exitstatus),
339
dbus.Int64(condition),
340
dbus.String(command))
341
else:
186
now = datetime.datetime.now()
187
if os.WIFEXITED(condition) \
188
and (os.WEXITSTATUS(condition) == 0):
189
logger.debug(u"Checker for %(name)s succeeded",
190
vars(self))
191
self.last_seen = now
192
gobject.source_remove(self.stop_initiator_tag)
193
self.stop_initiator_tag = gobject.timeout_add\
194
(self._timeout_milliseconds,
195
self.stop)
196
if not os.WIFEXITED(condition):
342
197
logger.warning(u"Checker for %(name)s crashed?",
343
198
vars(self))
344
if self.use_dbus:
345
# Emit D-Bus signal
346
self.CheckerCompleted(dbus.Int16(-1),
347
dbus.Int64(condition),
348
dbus.String(command))
349
350
def checked_ok(self):
351
"""Bump up the timeout for this client.
352
This should only be called when the client has been seen,
353
alive and well.
354
"""
355
self.last_checked_ok = datetime.datetime.utcnow()
356
gobject.source_remove(self.disable_initiator_tag)
357
self.disable_initiator_tag = (gobject.timeout_add
358
(self.timeout_milliseconds(),
359
self.disable))
360
if self.use_dbus:
361
# Emit D-Bus signal
362
self.PropertyChanged(
363
dbus.String(u"last_checked_ok"),
364
(_datetime_to_dbus(self.last_checked_ok,
365
variant_level=1)))
366
199
else:
200
logger.debug(u"Checker for %(name)s failed",
201
vars(self))
202
self.checker = None
203
self.checker_callback_tag = None
367
204
def start_checker(self):
368
205
"""Start a new checker subprocess if one is not running.
369
206
If a checker already exists, leave it running and do
370
207
nothing."""
371
# The reason for not killing a running checker is that if we
372
# did that, then if a checker (for some reason) started
373
# running slowly and taking more than 'interval' time, the
374
# client would inevitably timeout, since no checker would get
375
# a chance to run to completion. If we instead leave running
376
# checkers alone, the checker would have to take more time
377
# than 'timeout' for the client to be declared invalid, which
378
# is as it should be.
379
208
if self.checker is None:
209
logger.debug(u"Starting checker for %s",
210
self.name)
380
211
try:
381
# In case checker_command has exactly one % operator
382
command = self.checker_command % self.host
212
command = self.check_command % self.fqdn
383
213
except TypeError:
384
# Escape attributes for the shell
385
214
escaped_attrs = dict((key, re.escape(str(val)))
386
215
for key, val in
387
216
vars(self).iteritems())
388
217
try:
389
command = self.checker_command % escaped_attrs
218
command = self.check_command % escaped_attrs
390
219
except TypeError, error:
391
logger.error(u'Could not format string "%s":'
392
u' %s', self.checker_command, error)
220
logger.critical(u'Could not format string "%s": %s',
221
self.check_command, error)
393
222
return True # Try again later
394
223
try:
395
logger.info(u"Starting checker %r for %s",
396
command, self.name)
397
# We don't need to redirect stdout and stderr, since
398
# in normal mode, that is already done by daemon(),
399
# and in debug mode we don't want to. (Stdin is
400
# always replaced by /dev/null.)
401
self.checker = subprocess.Popen(command,
402
close_fds=True,
403
shell=True, cwd="/")
404
if self.use_dbus:
405
# Emit D-Bus signal
406
self.CheckerStarted(command)
407
self.PropertyChanged(
408
dbus.String("checker_running"),
409
dbus.Boolean(True, variant_level=1))
410
self.checker_callback_tag = (gobject.child_watch_add
411
(self.checker.pid,
412
self.checker_callback,
413
data=command))
414
except OSError, error:
224
self.checker = subprocess.\
225
Popen(command,
226
stdout=subprocess.PIPE,
227
close_fds=True, shell=True,
228
cwd="/")
229
self.checker_callback_tag = gobject.\
230
child_watch_add(self.checker.pid,
231
self.\
232
checker_callback)
233
except subprocess.OSError, error:
415
234
logger.error(u"Failed to start subprocess: %s",
416
235
error)
417
236
# Re-run this periodically if run by gobject.timeout_add
418
237
return True
419
420
238
def stop_checker(self):
421
239
"""Force the checker process, if any, to stop."""
422
if self.checker_callback_tag:
423
gobject.source_remove(self.checker_callback_tag)
424
self.checker_callback_tag = None
425
if getattr(self, "checker", None) is None:
240
if not hasattr(self, "checker") or self.checker is None:
426
241
return
427
logger.debug(u"Stopping checker for %(name)s", vars(self))
428
try:
429
os.kill(self.checker.pid, signal.SIGTERM)
430
#os.sleep(0.5)
431
#if self.checker.poll() is None:
432
# os.kill(self.checker.pid, signal.SIGKILL)
433
except OSError, error:
434
if error.errno != errno.ESRCH: # No such process
435
raise
242
gobject.source_remove(self.checker_callback_tag)
243
self.checker_callback_tag = None
244
os.kill(self.checker.pid, signal.SIGTERM)
245
if self.checker.poll() is None:
246
os.kill(self.checker.pid, signal.SIGKILL)
436
247
self.checker = None
437
if self.use_dbus:
438
self.PropertyChanged(dbus.String(u"checker_running"),
439
dbus.Boolean(False, variant_level=1))
440
441
def still_valid(self):
248
def still_valid(self, now=None):
442
249
"""Has the timeout not yet passed for this client?"""
443
if not getattr(self, "enabled", False):
444
return False
445
now = datetime.datetime.utcnow()
446
if self.last_checked_ok is None:
250
if now is None:
251
now = datetime.datetime.now()
252
if self.last_seen is None:
447
253
return now < (self.created + self.timeout)
448
254
else:
449
return now < (self.last_checked_ok + self.timeout)
450
451
## D-Bus methods & signals
452
_interface = u"se.bsnet.fukt.Mandos.Client"
453
454
# CheckedOK - method
455
CheckedOK = dbus.service.method(_interface)(checked_ok)
456
CheckedOK.__name__ = "CheckedOK"
457
458
# CheckerCompleted - signal
459
@dbus.service.signal(_interface, signature="nxs")
460
def CheckerCompleted(self, exitcode, waitstatus, command):
461
"D-Bus signal"
462
pass
463
464
# CheckerStarted - signal
465
@dbus.service.signal(_interface, signature="s")
466
def CheckerStarted(self, command):
467
"D-Bus signal"
468
pass
469
470
# GetAllProperties - method
471
@dbus.service.method(_interface, out_signature="a{sv}")
472
def GetAllProperties(self):
473
"D-Bus method"
474
return dbus.Dictionary({
475
dbus.String("name"):
476
dbus.String(self.name, variant_level=1),
477
dbus.String("fingerprint"):
478
dbus.String(self.fingerprint, variant_level=1),
479
dbus.String("host"):
480
dbus.String(self.host, variant_level=1),
481
dbus.String("created"):
482
_datetime_to_dbus(self.created, variant_level=1),
483
dbus.String("last_enabled"):
484
(_datetime_to_dbus(self.last_enabled,
485
variant_level=1)
486
if self.last_enabled is not None
487
else dbus.Boolean(False, variant_level=1)),
488
dbus.String("enabled"):
489
dbus.Boolean(self.enabled, variant_level=1),
490
dbus.String("last_checked_ok"):
491
(_datetime_to_dbus(self.last_checked_ok,
492
variant_level=1)
493
if self.last_checked_ok is not None
494
else dbus.Boolean (False, variant_level=1)),
495
dbus.String("timeout"):
496
dbus.UInt64(self.timeout_milliseconds(),
497
variant_level=1),
498
dbus.String("interval"):
499
dbus.UInt64(self.interval_milliseconds(),
500
variant_level=1),
501
dbus.String("checker"):
502
dbus.String(self.checker_command,
503
variant_level=1),
504
dbus.String("checker_running"):
505
dbus.Boolean(self.checker is not None,
506
variant_level=1),
507
dbus.String("object_path"):
508
dbus.ObjectPath(self.dbus_object_path,
509
variant_level=1)
510
}, signature="sv")
511
512
# IsStillValid - method
513
IsStillValid = (dbus.service.method(_interface, out_signature="b")
514
(still_valid))
515
IsStillValid.__name__ = "IsStillValid"
516
517
# PropertyChanged - signal
518
@dbus.service.signal(_interface, signature="sv")
519
def PropertyChanged(self, property, value):
520
"D-Bus signal"
521
pass
522
523
# SetChecker - method
524
@dbus.service.method(_interface, in_signature="s")
525
def SetChecker(self, checker):
526
"D-Bus setter method"
527
self.checker_command = checker
528
# Emit D-Bus signal
529
self.PropertyChanged(dbus.String(u"checker"),
530
dbus.String(self.checker_command,
531
variant_level=1))
532
533
# SetHost - method
534
@dbus.service.method(_interface, in_signature="s")
535
def SetHost(self, host):
536
"D-Bus setter method"
537
self.host = host
538
# Emit D-Bus signal
539
self.PropertyChanged(dbus.String(u"host"),
540
dbus.String(self.host, variant_level=1))
541
542
# SetInterval - method
543
@dbus.service.method(_interface, in_signature="t")
544
def SetInterval(self, milliseconds):
545
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
546
# Emit D-Bus signal
547
self.PropertyChanged(dbus.String(u"interval"),
548
(dbus.UInt64(self.interval_milliseconds(),
549
variant_level=1)))
550
551
# SetSecret - method
552
@dbus.service.method(_interface, in_signature="ay",
553
byte_arrays=True)
554
def SetSecret(self, secret):
555
"D-Bus setter method"
556
self.secret = str(secret)
557
558
# SetTimeout - method
559
@dbus.service.method(_interface, in_signature="t")
560
def SetTimeout(self, milliseconds):
561
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
562
# Emit D-Bus signal
563
self.PropertyChanged(dbus.String(u"timeout"),
564
(dbus.UInt64(self.timeout_milliseconds(),
565
variant_level=1)))
566
567
# Enable - method
568
Enable = dbus.service.method(_interface)(enable)
569
Enable.__name__ = "Enable"
570
571
# StartChecker - method
572
@dbus.service.method(_interface)
573
def StartChecker(self):
574
"D-Bus method"
575
self.start_checker()
576
577
# Disable - method
578
@dbus.service.method(_interface)
579
def Disable(self):
580
"D-Bus method"
581
self.disable()
582
583
# StopChecker - method
584
StopChecker = dbus.service.method(_interface)(stop_checker)
585
StopChecker.__name__ = "StopChecker"
586
587
del _interface
255
return now < (self.last_seen + self.timeout)
588
256
589
257
590
258
def peer_certificate(session):
591
"Return the peer's OpenPGP certificate as a bytestring"
592
259
# If not an OpenPGP certificate...
593
if (gnutls.library.functions
594
.gnutls_certificate_type_get(session._c_object)
595
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
260
if gnutls.library.functions.gnutls_certificate_type_get\
261
(session._c_object) \
262
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
596
263
# ...do the normal thing
597
264
return session.peer_certificate
598
list_size = ctypes.c_uint(1)
599
cert_list = (gnutls.library.functions
600
.gnutls_certificate_get_peers
601
(session._c_object, ctypes.byref(list_size)))
602
if not bool(cert_list) and list_size.value != 0:
603
raise gnutls.errors.GNUTLSError("error getting peer"
604
" certificate")
265
list_size = ctypes.c_uint()
266
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
267
(session._c_object, ctypes.byref(list_size))
605
268
if list_size.value == 0:
606
269
return None
607
270
cert = cert_list[0]
609
272
610
273
611
274
def fingerprint(openpgp):
612
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
613
# New GnuTLS "datum" with the OpenPGP public key
614
datum = (gnutls.library.types
615
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
616
ctypes.POINTER
617
(ctypes.c_ubyte)),
618
ctypes.c_uint(len(openpgp))))
619
275
# New empty GnuTLS certificate
620
276
crt = gnutls.library.types.gnutls_openpgp_crt_t()
621
(gnutls.library.functions
622
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
277
gnutls.library.functions.gnutls_openpgp_crt_init\
278
(ctypes.byref(crt))
279
# New GnuTLS "datum" with the OpenPGP public key
280
datum = gnutls.library.types.gnutls_datum_t\
281
(ctypes.cast(ctypes.c_char_p(openpgp),
282
ctypes.POINTER(ctypes.c_ubyte)),
283
ctypes.c_uint(len(openpgp)))
623
284
# Import the OpenPGP public key into the certificate
624
(gnutls.library.functions
625
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
626
gnutls.library.constants
627
.GNUTLS_OPENPGP_FMT_RAW))
628
# Verify the self signature in the key
629
crtverify = ctypes.c_uint()
630
(gnutls.library.functions
631
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
632
if crtverify.value != 0:
633
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
634
raise gnutls.errors.CertificateSecurityError("Verify failed")
285
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
286
(crt,
287
ctypes.byref(datum),
288
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
635
289
# New buffer for the fingerprint
636
buf = ctypes.create_string_buffer(20)
637
buf_len = ctypes.c_size_t()
290
buffer = ctypes.create_string_buffer(20)
291
buffer_length = ctypes.c_size_t()
638
292
# Get the fingerprint from the certificate into the buffer
639
(gnutls.library.functions
640
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
641
ctypes.byref(buf_len)))
293
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
294
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
642
295
# Deinit the certificate
643
296
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
644
297
# Convert the buffer to a Python bytestring
645
fpr = ctypes.string_at(buf, buf_len.value)
298
fpr = ctypes.string_at(buffer, buffer_length.value)
646
299
# Convert the bytestring to hexadecimal notation
647
300
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
648
301
return hex_fpr
649
302
650
303
651
class TCP_handler(SocketServer.BaseRequestHandler, object):
304
class tcp_handler(SocketServer.BaseRequestHandler, object):
652
305
"""A TCP request handler class.
653
306
Instantiated by IPv6_TCPServer for each request to handle it.
654
307
Note: This will run in its own forked process."""
655
308
656
309
def handle(self):
657
logger.info(u"TCP connection from: %s",
658
unicode(self.client_address))
659
session = (gnutls.connection
660
.ClientSession(self.request,
661
gnutls.connection
662
.X509Credentials()))
663
664
line = self.request.makefile().readline()
665
logger.debug(u"Protocol version: %r", line)
666
try:
667
if int(line.strip().split()[0]) > 1:
668
raise RuntimeError
669
except (ValueError, IndexError, RuntimeError), error:
670
logger.error(u"Unknown protocol version: %s", error)
671
return
672
673
# Note: gnutls.connection.X509Credentials is really a generic
674
# GnuTLS certificate credentials object so long as no X.509
675
# keys are added to it. Therefore, we can use it here despite
676
# using OpenPGP certificates.
310
logger.debug(u"TCP connection from: %s",
311
unicode(self.client_address))
312
session = gnutls.connection.ClientSession(self.request,
313
gnutls.connection.\
314
X509Credentials())
677
315
678
316
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
679
317
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
680
318
# "+DHE-DSS"))
681
# Use a fallback default, since this MUST be set.
682
priority = self.server.settings.get("priority", "NORMAL")
683
(gnutls.library.functions
684
.gnutls_priority_set_direct(session._c_object,
685
priority, None))
319
priority = "SECURE256"
320
321
gnutls.library.functions.gnutls_priority_set_direct\
322
(session._c_object, priority, None);
686
323
687
324
try:
688
325
session.handshake()
689
326
except gnutls.errors.GNUTLSError, error:
690
logger.warning(u"Handshake failed: %s", error)
327
logger.debug(u"Handshake failed: %s", error)
691
328
# Do not run session.bye() here: the session is not
692
329
# established. Just abandon the request.
693
330
return
694
logger.debug(u"Handshake succeeded")
695
331
try:
696
332
fpr = fingerprint(peer_certificate(session))
697
333
except (TypeError, gnutls.errors.GNUTLSError), error:
698
logger.warning(u"Bad certificate: %s", error)
334
logger.debug(u"Bad certificate: %s", error)
699
335
session.bye()
700
336
return
701
337
logger.debug(u"Fingerprint: %s", fpr)
702
703
for c in self.server.clients:
338
client = None
339
for c in clients:
704
340
if c.fingerprint == fpr:
705
341
client = c
706
342
break
707
else:
708
logger.warning(u"Client not found for fingerprint: %s",
709
fpr)
710
session.bye()
711
return
712
343
# Have to check if client.still_valid(), since it is possible
713
344
# that the client timed out while establishing the GnuTLS
714
345
# session.
715
if not client.still_valid():
716
logger.warning(u"Client %(name)s is invalid",
717
vars(client))
346
if (not client) or (not client.still_valid()):
347
if client:
348
logger.debug(u"Client %(name)s is invalid",
349
vars(client))
350
else:
351
logger.debug(u"Client not found for fingerprint: %s",
352
fpr)
718
353
session.bye()
719
354
return
720
## This won't work here, since we're in a fork.
721
# client.checked_ok()
722
355
sent_size = 0
723
356
while sent_size < len(client.secret):
724
357
sent = session.send(client.secret[sent_size:])
729
362
session.bye()
730
363
731
364
732
class IPv6_TCPServer(SocketServer.ForkingMixIn,
733
SocketServer.TCPServer, object):
365
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
734
366
"""IPv6 TCP server. Accepts 'None' as address and/or port.
735
367
Attributes:
736
settings: Server settings
368
options: Command line options
737
369
clients: Set() of Client objects
738
enabled: Boolean; whether this server is activated yet
739
370
"""
740
371
address_family = socket.AF_INET6
741
372
def __init__(self, *args, **kwargs):
742
if "settings" in kwargs:
743
self.settings = kwargs["settings"]
744
del kwargs["settings"]
373
if "options" in kwargs:
374
self.options = kwargs["options"]
375
del kwargs["options"]
745
376
if "clients" in kwargs:
746
377
self.clients = kwargs["clients"]
747
378
del kwargs["clients"]
748
self.enabled = False
749
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
379
return super(type(self), self).__init__(*args, **kwargs)
750
380
def server_bind(self):
751
381
"""This overrides the normal server_bind() function
752
382
to bind to an interface if one was specified, and also NOT to
753
383
bind to an address or port if they were not specified."""
754
if self.settings["interface"]:
755
# 25 is from /usr/include/asm-i486/socket.h
756
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
384
if self.options.interface:
385
if not hasattr(socket, "SO_BINDTODEVICE"):
386
# From /usr/include/asm-i486/socket.h
387
socket.SO_BINDTODEVICE = 25
757
388
try:
758
389
self.socket.setsockopt(socket.SOL_SOCKET,
759
SO_BINDTODEVICE,
760
self.settings["interface"])
390
socket.SO_BINDTODEVICE,
391
self.options.interface)
761
392
except socket.error, error:
762
393
if error[0] == errno.EPERM:
763
logger.error(u"No permission to"
764
u" bind to interface %s",
765
self.settings["interface"])
394
logger.warning(u"No permission to"
395
u" bind to interface %s",
396
self.options.interface)
766
397
else:
767
398
raise error
768
399
# Only bind(2) the socket if we really need to.
771
402
in6addr_any = "::"
772
403
self.server_address = (in6addr_any,
773
404
self.server_address[1])
774
elif not self.server_address[1]:
405
elif self.server_address[1] is None:
775
406
self.server_address = (self.server_address[0],
776
407
0)
777
# if self.settings["interface"]:
778
# self.server_address = (self.server_address[0],
779
# 0, # port
780
# 0, # flowinfo
781
# if_nametoindex
782
# (self.settings
783
# ["interface"]))
784
return super(IPv6_TCPServer, self).server_bind()
785
def server_activate(self):
786
if self.enabled:
787
return super(IPv6_TCPServer, self).server_activate()
788
def enable(self):
789
self.enabled = True
408
return super(type(self), self).server_bind()
790
409
791
410
792
411
def string_to_delta(interval):
793
412
"""Parse a string and return a datetime.timedelta
794
413
795
414
>>> string_to_delta('7d')
796
415
datetime.timedelta(7)
797
416
>>> string_to_delta('60s')
802
421
datetime.timedelta(1)
803
422
>>> string_to_delta(u'1w')
804
423
datetime.timedelta(7)
805
>>> string_to_delta('5m 30s')
806
datetime.timedelta(0, 330)
807
424
"""
808
timevalue = datetime.timedelta(0)
809
for s in interval.split():
810
try:
811
suffix = unicode(s[-1])
812
value = int(s[:-1])
813
if suffix == u"d":
814
delta = datetime.timedelta(value)
815
elif suffix == u"s":
816
delta = datetime.timedelta(0, value)
817
elif suffix == u"m":
818
delta = datetime.timedelta(0, 0, 0, 0, value)
819
elif suffix == u"h":
820
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
821
elif suffix == u"w":
822
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
823
else:
824
raise ValueError
825
except (ValueError, IndexError):
425
try:
426
suffix=unicode(interval[-1])
427
value=int(interval[:-1])
428
if suffix == u"d":
429
delta = datetime.timedelta(value)
430
elif suffix == u"s":
431
delta = datetime.timedelta(0, value)
432
elif suffix == u"m":
433
delta = datetime.timedelta(0, 0, 0, 0, value)
434
elif suffix == u"h":
435
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
436
elif suffix == u"w":
437
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
438
else:
826
439
raise ValueError
827
timevalue += delta
828
return timevalue
440
except (ValueError, IndexError):
441
raise ValueError
442
return delta
443
444
445
def add_service():
446
"""From the Avahi server example code"""
447
global group, serviceName, serviceType, servicePort, serviceTXT, \
448
domain, host
449
if group is None:
450
group = dbus.Interface(
451
bus.get_object( avahi.DBUS_NAME,
452
server.EntryGroupNew()),
453
avahi.DBUS_INTERFACE_ENTRY_GROUP)
454
group.connect_to_signal('StateChanged',
455
entry_group_state_changed)
456
logger.debug(u"Adding service '%s' of type '%s' ...",
457
serviceName, serviceType)
458
459
group.AddService(
460
serviceInterface, # interface
461
avahi.PROTO_INET6, # protocol
462
dbus.UInt32(0), # flags
463
serviceName, serviceType,
464
domain, host,
465
dbus.UInt16(servicePort),
466
avahi.string_array_to_txt_array(serviceTXT))
467
group.Commit()
468
469
470
def remove_service():
471
"""From the Avahi server example code"""
472
global group
473
474
if not group is None:
475
group.Reset()
829
476
830
477
831
478
def server_state_changed(state):
832
"""Derived from the Avahi example code"""
479
"""From the Avahi server example code"""
833
480
if state == avahi.SERVER_COLLISION:
834
logger.error(u"Zeroconf server name collision")
835
service.remove()
481
logger.warning(u"Server name collision")
482
remove_service()
836
483
elif state == avahi.SERVER_RUNNING:
837
service.add()
484
add_service()
838
485
839
486
840
487
def entry_group_state_changed(state, error):
841
"""Derived from the Avahi example code"""
842
logger.debug(u"Avahi state change: %i", state)
488
"""From the Avahi server example code"""
489
global serviceName, server, rename_count
490
491
logger.debug(u"state change: %i", state)
843
492
844
493
if state == avahi.ENTRY_GROUP_ESTABLISHED:
845
logger.debug(u"Zeroconf service established.")
494
logger.debug(u"Service established.")
846
495
elif state == avahi.ENTRY_GROUP_COLLISION:
847
logger.warning(u"Zeroconf service name collision.")
848
service.rename()
496
497
rename_count = rename_count - 1
498
if rename_count > 0:
499
name = server.GetAlternativeServiceName(name)
500
logger.warning(u"Service name collision, "
501
u"changing name to '%s' ...", name)
502
remove_service()
503
add_service()
504
505
else:
506
logger.error(u"No suitable service name found "
507
u"after %i retries, exiting.",
508
n_rename)
509
main_loop.quit()
849
510
elif state == avahi.ENTRY_GROUP_FAILURE:
850
logger.critical(u"Avahi: Error in group state changed %s",
851
unicode(error))
852
raise AvahiGroupError(u"State changed: %s" % unicode(error))
511
logger.error(u"Error in group state changed %s",
512
unicode(error))
513
main_loop.quit()
514
return
515
853
516
854
517
def if_nametoindex(interface):
855
"""Call the C function if_nametoindex(), or equivalent"""
856
global if_nametoindex
518
"""Call the C function if_nametoindex()"""
857
519
try:
858
if_nametoindex = (ctypes.cdll.LoadLibrary
859
(ctypes.util.find_library("c"))
860
.if_nametoindex)
520
libc = ctypes.cdll.LoadLibrary("libc.so.6")
521
return libc.if_nametoindex(interface)
861
522
except (OSError, AttributeError):
862
523
if "struct" not in sys.modules:
863
524
import struct
864
525
if "fcntl" not in sys.modules:
865
526
import fcntl
866
def if_nametoindex(interface):
867
"Get an interface index the hard way, i.e. using fcntl()"
868
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
869
with closing(socket.socket()) as s:
870
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
871
struct.pack("16s16x", interface))
872
interface_index = struct.unpack("I", ifreq[16:20])[0]
873
return interface_index
874
return if_nametoindex(interface)
875
876
877
def daemon(nochdir = False, noclose = False):
878
"""See daemon(3). Standard BSD Unix function.
879
This should really exist as os.daemon, but it doesn't (yet)."""
880
if os.fork():
881
sys.exit()
882
os.setsid()
883
if not nochdir:
884
os.chdir("/")
885
if os.fork():
886
sys.exit()
887
if not noclose:
888
# Close all standard open file descriptors
889
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
890
if not stat.S_ISCHR(os.fstat(null).st_mode):
891
raise OSError(errno.ENODEV,
892
"/dev/null not a character device")
893
os.dup2(null, sys.stdin.fileno())
894
os.dup2(null, sys.stdout.fileno())
895
os.dup2(null, sys.stderr.fileno())
896
if null > 2:
897
os.close(null)
898
899
900
def main():
901
parser = optparse.OptionParser(version = "%%prog %s" % version)
527
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
528
s = socket.socket()
529
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
530
struct.pack("16s16x", interface))
531
s.close()
532
interface_index = struct.unpack("I", ifreq[16:20])[0]
533
return interface_index
534
535
536
if __name__ == '__main__':
537
parser = OptionParser()
902
538
parser.add_option("-i", "--interface", type="string",
903
metavar="IF", help="Bind to interface IF")
904
parser.add_option("-a", "--address", type="string",
905
help="Address to listen for requests on")
906
parser.add_option("-p", "--port", type="int",
539
default=None, metavar="IF",
540
help="Bind to interface IF")
541
parser.add_option("--cert", type="string", default="cert.pem",
542
metavar="FILE",
543
help="Public key certificate PEM file to use")
544
parser.add_option("--key", type="string", default="key.pem",
545
metavar="FILE",
546
help="Private key PEM file to use")
547
parser.add_option("--ca", type="string", default="ca.pem",
548
metavar="FILE",
549
help="Certificate Authority certificate PEM file to use")
550
parser.add_option("--crl", type="string", default="crl.pem",
551
metavar="FILE",
552
help="Certificate Revokation List PEM file to use")
553
parser.add_option("-p", "--port", type="int", default=None,
907
554
help="Port number to receive requests on")
908
parser.add_option("--check", action="store_true",
555
parser.add_option("--timeout", type="string", # Parsed later
556
default="1h",
557
help="Amount of downtime allowed for clients")
558
parser.add_option("--interval", type="string", # Parsed later
559
default="5m",
560
help="How often to check that a client is up")
561
parser.add_option("--check", action="store_true", default=False,
909
562
help="Run self-test")
910
parser.add_option("--debug", action="store_true",
911
help="Debug mode; run in foreground and log to"
912
" terminal")
913
parser.add_option("--priority", type="string", help="GnuTLS"
914
" priority string (see GnuTLS documentation)")
915
parser.add_option("--servicename", type="string", metavar="NAME",
916
help="Zeroconf service name")
917
parser.add_option("--configdir", type="string",
918
default="/etc/mandos", metavar="DIR",
919
help="Directory to search for configuration"
920
" files")
921
parser.add_option("--no-dbus", action="store_false",
922
dest="use_dbus",
923
help="Do not provide D-Bus system bus"
924
" interface")
925
options = parser.parse_args()[0]
563
parser.add_option("--debug", action="store_true", default=False,
564
help="Debug mode")
565
(options, args) = parser.parse_args()
926
566
927
567
if options.check:
928
568
import doctest
929
569
doctest.testmod()
930
570
sys.exit()
931
571
932
# Default values for config file for server-global settings
933
server_defaults = { "interface": "",
934
"address": "",
935
"port": "",
936
"debug": "False",
937
"priority":
938
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
939
"servicename": "Mandos",
940
"use_dbus": "True",
941
}
942
943
# Parse config file for server-global settings
944
server_config = ConfigParser.SafeConfigParser(server_defaults)
945
del server_defaults
946
server_config.read(os.path.join(options.configdir, "mandos.conf"))
947
# Convert the SafeConfigParser object to a dict
948
server_settings = server_config.defaults()
949
# Use the appropriate methods on the non-string config options
950
server_settings["debug"] = server_config.getboolean("DEFAULT",
951
"debug")
952
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
953
"use_dbus")
954
if server_settings["port"]:
955
server_settings["port"] = server_config.getint("DEFAULT",
956
"port")
957
del server_config
958
959
# Override the settings from the config file with command line
960
# options, if set.
961
for option in ("interface", "address", "port", "debug",
962
"priority", "servicename", "configdir",
963
"use_dbus"):
964
value = getattr(options, option)
965
if value is not None:
966
server_settings[option] = value
967
del options
968
# Now we have our good server settings in "server_settings"
969
970
# For convenience
971
debug = server_settings["debug"]
972
use_dbus = server_settings["use_dbus"]
973
974
def sigsegvhandler(signum, frame):
975
raise RuntimeError('Segmentation fault')
976
977
if not debug:
978
syslogger.setLevel(logging.WARNING)
979
console.setLevel(logging.WARNING)
980
else:
981
signal.signal(signal.SIGSEGV, sigsegvhandler)
982
983
if server_settings["servicename"] != "Mandos":
984
syslogger.setFormatter(logging.Formatter
985
('Mandos (%s): %%(levelname)s:'
986
' %%(message)s'
987
% server_settings["servicename"]))
988
989
# Parse config file with clients
990
client_defaults = { "timeout": "1h",
991
"interval": "5m",
992
"checker": "fping -q -- %%(host)s",
993
"host": "",
994
}
995
client_config = ConfigParser.SafeConfigParser(client_defaults)
996
client_config.read(os.path.join(server_settings["configdir"],
997
"clients.conf"))
998
999
clients = Set()
1000
tcp_server = IPv6_TCPServer((server_settings["address"],
1001
server_settings["port"]),
1002
TCP_handler,
1003
settings=server_settings,
1004
clients=clients)
1005
pidfilename = "/var/run/mandos.pid"
1006
try:
1007
pidfile = open(pidfilename, "w")
1008
except IOError, error:
1009
logger.error("Could not open file %r", pidfilename)
1010
1011
try:
1012
uid = pwd.getpwnam("_mandos").pw_uid
1013
gid = pwd.getpwnam("_mandos").pw_gid
1014
except KeyError:
1015
try:
1016
uid = pwd.getpwnam("mandos").pw_uid
1017
gid = pwd.getpwnam("mandos").pw_gid
1018
except KeyError:
1019
try:
1020
uid = pwd.getpwnam("nobody").pw_uid
1021
gid = pwd.getpwnam("nogroup").pw_gid
1022
except KeyError:
1023
uid = 65534
1024
gid = 65534
1025
try:
1026
os.setgid(gid)
1027
os.setuid(uid)
1028
except OSError, error:
1029
if error[0] != errno.EPERM:
1030
raise error
1031
1032
# Enable all possible GnuTLS debugging
1033
if debug:
1034
# "Use a log level over 10 to enable all debugging options."
1035
# - GnuTLS manual
1036
gnutls.library.functions.gnutls_global_set_log_level(11)
1037
1038
@gnutls.library.types.gnutls_log_func
1039
def debug_gnutls(level, string):
1040
logger.debug("GnuTLS: %s", string[:-1])
1041
1042
(gnutls.library.functions
1043
.gnutls_global_set_log_function(debug_gnutls))
1044
1045
global service
1046
service = AvahiService(name = server_settings["servicename"],
1047
servicetype = "_mandos._tcp", )
1048
if server_settings["interface"]:
1049
service.interface = (if_nametoindex
1050
(server_settings["interface"]))
1051
1052
global main_loop
1053
global bus
1054
global server
1055
# From the Avahi example code
572
# Parse the time arguments
573
try:
574
options.timeout = string_to_delta(options.timeout)
575
except ValueError:
576
parser.error("option --timeout: Unparseable time")
577
try:
578
options.interval = string_to_delta(options.interval)
579
except ValueError:
580
parser.error("option --interval: Unparseable time")
581
582
# Parse config file
583
defaults = { "checker": "sleep 1; fping -q -- %%(fqdn)s" }
584
client_config = ConfigParser.SafeConfigParser(defaults)
585
#client_config.readfp(open("secrets.conf"), "secrets.conf")
586
client_config.read("mandos-clients.conf")
587
588
# From the Avahi server example code
1056
589
DBusGMainLoop(set_as_default=True )
1057
590
main_loop = gobject.MainLoop()
1058
591
bus = dbus.SystemBus()
1059
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1060
avahi.DBUS_PATH_SERVER),
1061
avahi.DBUS_INTERFACE_SERVER)
592
server = dbus.Interface(
593
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
594
avahi.DBUS_INTERFACE_SERVER )
1062
595
# End of Avahi example code
1063
if use_dbus:
1064
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1065
1066
clients.update(Set(Client(name = section,
1067
config
1068
= dict(client_config.items(section)),
1069
use_dbus = use_dbus)
596
597
debug = options.debug
598
599
clients = Set()
600
def remove_from_clients(client):
601
clients.remove(client)
602
if not clients:
603
logger.debug(u"No clients left, exiting")
604
main_loop.quit()
605
606
clients.update(Set(Client(name=section, options=options,
607
stop_hook = remove_from_clients,
608
**(dict(client_config\
609
.items(section))))
1070
610
for section in client_config.sections()))
1071
if not clients:
1072
logger.warning(u"No clients defined")
1073
1074
if debug:
1075
# Redirect stdin so all checkers get /dev/null
1076
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1077
os.dup2(null, sys.stdin.fileno())
1078
if null > 2:
1079
os.close(null)
1080
else:
1081
# No console logging
1082
logger.removeHandler(console)
1083
# Close all input and output, do double fork, etc.
1084
daemon()
1085
1086
try:
1087
pid = os.getpid()
1088
pidfile.write(str(pid) + "\n")
1089
pidfile.close()
1090
del pidfile
1091
except IOError:
1092
logger.error(u"Could not write to file %r with PID %d",
1093
pidfilename, pid)
1094
except NameError:
1095
# "pidfile" was never created
1096
pass
1097
del pidfilename
1098
1099
def cleanup():
1100
"Cleanup function; run on exit"
1101
global group
1102
# From the Avahi example code
1103
if not group is None:
1104
group.Free()
1105
group = None
1106
# End of Avahi example code
1107
1108
while clients:
1109
client = clients.pop()
1110
client.disable_hook = None
1111
client.disable()
1112
1113
atexit.register(cleanup)
1114
1115
if not debug:
1116
signal.signal(signal.SIGINT, signal.SIG_IGN)
1117
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1118
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1119
1120
if use_dbus:
1121
class MandosServer(dbus.service.Object):
1122
"""A D-Bus proxy object"""
1123
def __init__(self):
1124
dbus.service.Object.__init__(self, bus, "/")
1125
_interface = u"se.bsnet.fukt.Mandos"
1126
1127
@dbus.service.signal(_interface, signature="oa{sv}")
1128
def ClientAdded(self, objpath, properties):
1129
"D-Bus signal"
1130
pass
1131
1132
@dbus.service.signal(_interface, signature="os")
1133
def ClientRemoved(self, objpath, name):
1134
"D-Bus signal"
1135
pass
1136
1137
@dbus.service.method(_interface, out_signature="ao")
1138
def GetAllClients(self):
1139
"D-Bus method"
1140
return dbus.Array(c.dbus_object_path for c in clients)
1141
1142
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1143
def GetAllClientsWithProperties(self):
1144
"D-Bus method"
1145
return dbus.Dictionary(
1146
((c.dbus_object_path, c.GetAllProperties())
1147
for c in clients),
1148
signature="oa{sv}")
1149
1150
@dbus.service.method(_interface, in_signature="o")
1151
def RemoveClient(self, object_path):
1152
"D-Bus method"
1153
for c in clients:
1154
if c.dbus_object_path == object_path:
1155
clients.remove(c)
1156
# Don't signal anything except ClientRemoved
1157
c.use_dbus = False
1158
c.disable()
1159
# Emit D-Bus signal
1160
self.ClientRemoved(object_path, c.name)
1161
return
1162
raise KeyError
1163
1164
del _interface
1165
1166
mandos_server = MandosServer()
1167
1168
611
for client in clients:
1169
if use_dbus:
1170
# Emit D-Bus signal
1171
mandos_server.ClientAdded(client.dbus_object_path,
1172
client.GetAllProperties())
1173
client.enable()
1174
1175
tcp_server.enable()
1176
tcp_server.server_activate()
1177
1178
# Find out what port we got
1179
service.port = tcp_server.socket.getsockname()[1]
1180
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1181
u" scope_id %d" % tcp_server.socket.getsockname())
1182
1183
#service.interface = tcp_server.socket.getsockname()[3]
1184
612
client.start()
613
614
tcp_server = IPv6_TCPServer((None, options.port),
615
tcp_handler,
616
options=options,
617
clients=clients)
618
# Find out what random port we got
619
servicePort = tcp_server.socket.getsockname()[1]
620
logger.debug(u"Now listening on port %d", servicePort)
621
622
if options.interface is not None:
623
serviceInterface = if_nametoindex(options.interface)
624
625
# From the Avahi server example code
626
server.connect_to_signal("StateChanged", server_state_changed)
627
server_state_changed(server.GetState())
628
# End of Avahi example code
629
630
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
631
lambda *args, **kwargs:
632
tcp_server.handle_request(*args[2:],
633
**kwargs) or True)
1185
634
try:
1186
# From the Avahi example code
1187
server.connect_to_signal("StateChanged", server_state_changed)
1188
try:
1189
server_state_changed(server.GetState())
1190
except dbus.exceptions.DBusException, error:
1191
logger.critical(u"DBusException: %s", error)
1192
sys.exit(1)
1193
# End of Avahi example code
1194
1195
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1196
lambda *args, **kwargs:
1197
(tcp_server.handle_request
1198
(*args[2:], **kwargs) or True))
1199
1200
logger.debug(u"Starting main loop")
1201
635
main_loop.run()
1202
except AvahiError, error:
1203
logger.critical(u"AvahiError: %s", error)
1204
sys.exit(1)
1205
636
except KeyboardInterrupt:
1206
if debug:
1207
print
637
print
638
639
# Cleanup here
1208
640
1209
if __name__ == '__main__':
1210
main()
641
# From the Avahi server example code
642
if not group is None:
643
group.Free()
644
# End of Avahi example code
645
646
for client in clients:
647
client.stop_hook = None
648
client.stop()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0