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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 [%(process)d]: %(levelname)s:'
77
' %(message)s'))
78
logger.addHandler(syslogger)
79
80
console = logging.StreamHandler()
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
83
logger.addHandler(console)
84
85
class AvahiError(Exception):
86
def __init__(self, value, *args, **kwargs):
87
self.value = value
88
super(AvahiError, self).__init__(value, *args, **kwargs)
89
def __unicode__(self):
90
return unicode(repr(self.value))
91
92
class AvahiServiceError(AvahiError):
93
pass
94
95
class AvahiGroupError(AvahiError):
96
pass
97
98
99
class AvahiService(object):
100
"""An Avahi (Zeroconf) service.
101
Attributes:
102
interface: integer; avahi.IF_UNSPEC or an interface index.
103
Used to optionally bind to the specified interface.
104
name: string; Example: 'Mandos'
105
type: string; Example: '_mandos._tcp'.
106
See <http://www.dns-sd.org/ServiceTypes.html>
107
port: integer; what port to announce
108
TXT: list of strings; TXT record for the service
109
domain: string; Domain to publish on, default to .local if empty.
110
host: string; Host to publish records for, default is localhost
111
max_renames: integer; maximum number of renames
112
rename_count: integer; counter so we only rename after collisions
113
a sensible number of times
114
"""
115
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
servicetype = None, port = None, TXT = None,
117
domain = "", host = "", max_renames = 32768,
118
protocol = avahi.PROTO_UNSPEC):
119
self.interface = interface
120
self.name = name
121
self.type = servicetype
122
self.port = port
123
self.TXT = TXT if TXT is not None else []
124
self.domain = domain
125
self.host = host
126
self.rename_count = 0
127
self.max_renames = max_renames
128
self.protocol = protocol
129
def rename(self):
130
"""Derived from the Avahi example code"""
131
if self.rename_count >= self.max_renames:
132
logger.critical(u"No suitable Zeroconf service name found"
133
u" after %i retries, exiting.",
134
self.rename_count)
135
raise AvahiServiceError(u"Too many renames")
136
self.name = server.GetAlternativeServiceName(self.name)
137
logger.info(u"Changing Zeroconf service name to %r ...",
138
str(self.name))
139
syslogger.setFormatter(logging.Formatter
140
('Mandos (%s): %%(levelname)s:'
141
' %%(message)s' % self.name))
142
self.remove()
143
self.add()
144
self.rename_count += 1
145
def remove(self):
146
"""Derived from the Avahi example code"""
147
if group is not None:
148
group.Reset()
149
def add(self):
150
"""Derived from the Avahi example code"""
151
global group
152
if group is None:
153
group = dbus.Interface(bus.get_object
154
(avahi.DBUS_NAME,
155
server.EntryGroupNew()),
156
avahi.DBUS_INTERFACE_ENTRY_GROUP)
157
group.connect_to_signal('StateChanged',
158
entry_group_state_changed)
159
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
160
service.name, service.type)
161
group.AddService(
162
self.interface, # interface
163
self.protocol, # protocol
164
dbus.UInt32(0), # flags
165
self.name, self.type,
166
self.domain, self.host,
167
dbus.UInt16(self.port),
168
avahi.string_array_to_txt_array(self.TXT))
169
group.Commit()
170
171
# From the Avahi example code:
172
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
173
53
# End of Avahi example code
174
54
175
55
176
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
181
class Client(dbus.service.Object):
56
class Client(object):
182
57
"""A representation of a client host served by this server.
183
58
Attributes:
184
name: string; from the config file, used in log messages and
185
D-Bus identifiers
59
name: string; from the config file, used in log messages
186
60
fingerprint: string (40 or 32 hexadecimal digits); used to
187
61
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.
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.
201
73
checker_initiator_tag: a gobject event source tag, or None
202
disable_initiator_tag: - '' -
74
stop_initiator_tag: - '' -
203
75
checker_callback_tag: - '' -
204
76
checker_command: string; External command which is run to check if
205
client lives. %() expansions are done at
77
client lives. %()s expansions are done at
206
78
runtime with vars(self) as dict, so that for
207
79
instance %(name)s can be used in the command.
208
use_dbus: bool(); Whether to provide D-Bus interface and signals
209
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: - '' -
210
85
"""
211
def timeout_milliseconds(self):
212
"Return the 'timeout' attribute in milliseconds"
213
return ((self.timeout.days * 24 * 60 * 60 * 1000)
214
+ (self.timeout.seconds * 1000)
215
+ (self.timeout.microseconds // 1000))
216
217
def interval_milliseconds(self):
218
"Return the 'interval' attribute in milliseconds"
219
return ((self.interval.days * 24 * 60 * 60 * 1000)
220
+ (self.interval.seconds * 1000)
221
+ (self.interval.microseconds // 1000))
222
223
def __init__(self, name = None, disable_hook=None, config=None,
224
use_dbus=True):
225
"""Note: the 'checker' key in 'config' sets the
226
'checker_command' attribute and *not* the 'checker'
227
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):
228
112
self.name = name
229
if config is None:
230
config = {}
231
logger.debug(u"Creating client %r", self.name)
232
self.use_dbus = False # During __init__
233
# Uppercase and remove spaces from fingerprint for later
234
# comparison purposes with return value from the fingerprint()
235
# function
236
self.fingerprint = (config["fingerprint"].upper()
237
.replace(u" ", u""))
238
logger.debug(u" Fingerprint: %s", self.fingerprint)
239
if "secret" in config:
240
self.secret = config["secret"].decode(u"base64")
241
elif "secfile" in config:
242
with closing(open(os.path.expanduser
243
(os.path.expandvars
244
(config["secfile"])))) as secfile:
245
self.secret = secfile.read()
246
else:
247
raise TypeError(u"No secret or secfile for client %s"
248
% self.name)
249
self.host = config.get("host", "")
250
self.created = datetime.datetime.utcnow()
251
self.enabled = False
252
self.last_enabled = None
253
self.last_checked_ok = None
254
self.timeout = string_to_delta(config["timeout"])
255
self.interval = string_to_delta(config["interval"])
256
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
257
138
self.checker = None
258
139
self.checker_initiator_tag = None
259
self.disable_initiator_tag = None
140
self.stop_initiator_tag = None
260
141
self.checker_callback_tag = None
261
self.checker_command = config["checker"]
262
self.last_connect = None
263
# Only now, when this client is initialized, can it show up on
264
# the D-Bus
265
self.use_dbus = use_dbus
266
if self.use_dbus:
267
self.dbus_object_path = (dbus.ObjectPath
268
("/clients/"
269
+ self.name.replace(".", "_")))
270
dbus.service.Object.__init__(self, bus,
271
self.dbus_object_path)
272
273
def enable(self):
274
"""Start this client's checker and timeout hooks"""
275
self.last_enabled = datetime.datetime.utcnow()
142
self.check_command = checker
143
def start(self):
144
"""Start this clients checker and timeout hooks"""
276
145
# Schedule a new checker to be started an 'interval' from now,
277
146
# and every interval from then on.
278
self.checker_initiator_tag = (gobject.timeout_add
279
(self.interval_milliseconds(),
280
self.start_checker))
147
self.checker_initiator_tag = gobject.timeout_add\
148
(self._interval_milliseconds,
149
self.start_checker)
281
150
# Also start a new checker *right now*.
282
151
self.start_checker()
283
# Schedule a disable() when 'timeout' has passed
284
self.disable_initiator_tag = (gobject.timeout_add
285
(self.timeout_milliseconds(),
286
self.disable))
287
self.enabled = True
288
if self.use_dbus:
289
# Emit D-Bus signals
290
self.PropertyChanged(dbus.String(u"enabled"),
291
dbus.Boolean(True, variant_level=1))
292
self.PropertyChanged(dbus.String(u"last_enabled"),
293
(_datetime_to_dbus(self.last_enabled,
294
variant_level=1)))
295
296
def disable(self):
297
"""Disable this client."""
298
if not getattr(self, "enabled", False):
299
return False
300
logger.info(u"Disabling client %s", self.name)
301
if getattr(self, "disable_initiator_tag", False):
302
gobject.source_remove(self.disable_initiator_tag)
303
self.disable_initiator_tag = None
304
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:
305
166
gobject.source_remove(self.checker_initiator_tag)
306
167
self.checker_initiator_tag = None
307
168
self.stop_checker()
308
if self.disable_hook:
309
self.disable_hook(self)
310
self.enabled = False
311
if self.use_dbus:
312
# Emit D-Bus signal
313
self.PropertyChanged(dbus.String(u"enabled"),
314
dbus.Boolean(False, variant_level=1))
169
if self.stop_hook:
170
self.stop_hook(self)
315
171
# Do not run this again if called by a gobject.timeout_add
316
172
return False
317
318
173
def __del__(self):
319
self.disable_hook = None
320
self.disable()
321
322
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):
323
185
"""The checker has completed, so take appropriate actions."""
324
self.checker_callback_tag = None
325
self.checker = None
326
if self.use_dbus:
327
# Emit D-Bus signal
328
self.PropertyChanged(dbus.String(u"checker_running"),
329
dbus.Boolean(False, variant_level=1))
330
if os.WIFEXITED(condition):
331
exitstatus = os.WEXITSTATUS(condition)
332
if exitstatus == 0:
333
logger.info(u"Checker for %(name)s succeeded",
334
vars(self))
335
self.checked_ok()
336
else:
337
logger.info(u"Checker for %(name)s failed",
338
vars(self))
339
if self.use_dbus:
340
# Emit D-Bus signal
341
self.CheckerCompleted(dbus.Int16(exitstatus),
342
dbus.Int64(condition),
343
dbus.String(command))
344
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):
345
197
logger.warning(u"Checker for %(name)s crashed?",
346
198
vars(self))
347
if self.use_dbus:
348
# Emit D-Bus signal
349
self.CheckerCompleted(dbus.Int16(-1),
350
dbus.Int64(condition),
351
dbus.String(command))
352
353
def checked_ok(self):
354
"""Bump up the timeout for this client.
355
This should only be called when the client has been seen,
356
alive and well.
357
"""
358
self.last_checked_ok = datetime.datetime.utcnow()
359
gobject.source_remove(self.disable_initiator_tag)
360
self.disable_initiator_tag = (gobject.timeout_add
361
(self.timeout_milliseconds(),
362
self.disable))
363
if self.use_dbus:
364
# Emit D-Bus signal
365
self.PropertyChanged(
366
dbus.String(u"last_checked_ok"),
367
(_datetime_to_dbus(self.last_checked_ok,
368
variant_level=1)))
369
199
else:
200
logger.debug(u"Checker for %(name)s failed",
201
vars(self))
202
self.checker = None
203
self.checker_callback_tag = None
370
204
def start_checker(self):
371
205
"""Start a new checker subprocess if one is not running.
372
206
If a checker already exists, leave it running and do
373
207
nothing."""
374
# The reason for not killing a running checker is that if we
375
# did that, then if a checker (for some reason) started
376
# running slowly and taking more than 'interval' time, the
377
# client would inevitably timeout, since no checker would get
378
# a chance to run to completion. If we instead leave running
379
# checkers alone, the checker would have to take more time
380
# than 'timeout' for the client to be declared invalid, which
381
# is as it should be.
382
208
if self.checker is None:
209
logger.debug(u"Starting checker for %s",
210
self.name)
383
211
try:
384
# In case checker_command has exactly one % operator
385
command = self.checker_command % self.host
212
command = self.check_command % self.fqdn
386
213
except TypeError:
387
# Escape attributes for the shell
388
214
escaped_attrs = dict((key, re.escape(str(val)))
389
215
for key, val in
390
216
vars(self).iteritems())
391
217
try:
392
command = self.checker_command % escaped_attrs
218
command = self.check_command % escaped_attrs
393
219
except TypeError, error:
394
logger.error(u'Could not format string "%s":'
395
u' %s', self.checker_command, error)
220
logger.critical(u'Could not format string "%s": %s',
221
self.check_command, error)
396
222
return True # Try again later
397
223
try:
398
logger.info(u"Starting checker %r for %s",
399
command, self.name)
400
# We don't need to redirect stdout and stderr, since
401
# in normal mode, that is already done by daemon(),
402
# and in debug mode we don't want to. (Stdin is
403
# always replaced by /dev/null.)
404
self.checker = subprocess.Popen(command,
405
close_fds=True,
406
shell=True, cwd="/")
407
if self.use_dbus:
408
# Emit D-Bus signal
409
self.CheckerStarted(command)
410
self.PropertyChanged(
411
dbus.String("checker_running"),
412
dbus.Boolean(True, variant_level=1))
413
self.checker_callback_tag = (gobject.child_watch_add
414
(self.checker.pid,
415
self.checker_callback,
416
data=command))
417
# The checker may have completed before the gobject
418
# watch was added. Check for this.
419
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
420
if pid:
421
gobject.source_remove(self.checker_callback_tag)
422
self.checker_callback(pid, status, command)
423
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:
424
234
logger.error(u"Failed to start subprocess: %s",
425
235
error)
426
236
# Re-run this periodically if run by gobject.timeout_add
427
237
return True
428
429
238
def stop_checker(self):
430
239
"""Force the checker process, if any, to stop."""
431
if self.checker_callback_tag:
432
gobject.source_remove(self.checker_callback_tag)
433
self.checker_callback_tag = None
434
if getattr(self, "checker", None) is None:
240
if not hasattr(self, "checker") or self.checker is None:
435
241
return
436
logger.debug(u"Stopping checker for %(name)s", vars(self))
437
try:
438
os.kill(self.checker.pid, signal.SIGTERM)
439
#os.sleep(0.5)
440
#if self.checker.poll() is None:
441
# os.kill(self.checker.pid, signal.SIGKILL)
442
except OSError, error:
443
if error.errno != errno.ESRCH: # No such process
444
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)
445
247
self.checker = None
446
if self.use_dbus:
447
self.PropertyChanged(dbus.String(u"checker_running"),
448
dbus.Boolean(False, variant_level=1))
449
450
def still_valid(self):
248
def still_valid(self, now=None):
451
249
"""Has the timeout not yet passed for this client?"""
452
if not getattr(self, "enabled", False):
453
return False
454
now = datetime.datetime.utcnow()
455
if self.last_checked_ok is None:
250
if now is None:
251
now = datetime.datetime.now()
252
if self.last_seen is None:
456
253
return now < (self.created + self.timeout)
457
254
else:
458
return now < (self.last_checked_ok + self.timeout)
459
460
## D-Bus methods & signals
461
_interface = u"se.bsnet.fukt.Mandos.Client"
462
463
# CheckedOK - method
464
CheckedOK = dbus.service.method(_interface)(checked_ok)
465
CheckedOK.__name__ = "CheckedOK"
466
467
# CheckerCompleted - signal
468
@dbus.service.signal(_interface, signature="nxs")
469
def CheckerCompleted(self, exitcode, waitstatus, command):
470
"D-Bus signal"
471
pass
472
473
# CheckerStarted - signal
474
@dbus.service.signal(_interface, signature="s")
475
def CheckerStarted(self, command):
476
"D-Bus signal"
477
pass
478
479
# GetAllProperties - method
480
@dbus.service.method(_interface, out_signature="a{sv}")
481
def GetAllProperties(self):
482
"D-Bus method"
483
return dbus.Dictionary({
484
dbus.String("name"):
485
dbus.String(self.name, variant_level=1),
486
dbus.String("fingerprint"):
487
dbus.String(self.fingerprint, variant_level=1),
488
dbus.String("host"):
489
dbus.String(self.host, variant_level=1),
490
dbus.String("created"):
491
_datetime_to_dbus(self.created, variant_level=1),
492
dbus.String("last_enabled"):
493
(_datetime_to_dbus(self.last_enabled,
494
variant_level=1)
495
if self.last_enabled is not None
496
else dbus.Boolean(False, variant_level=1)),
497
dbus.String("enabled"):
498
dbus.Boolean(self.enabled, variant_level=1),
499
dbus.String("last_checked_ok"):
500
(_datetime_to_dbus(self.last_checked_ok,
501
variant_level=1)
502
if self.last_checked_ok is not None
503
else dbus.Boolean (False, variant_level=1)),
504
dbus.String("timeout"):
505
dbus.UInt64(self.timeout_milliseconds(),
506
variant_level=1),
507
dbus.String("interval"):
508
dbus.UInt64(self.interval_milliseconds(),
509
variant_level=1),
510
dbus.String("checker"):
511
dbus.String(self.checker_command,
512
variant_level=1),
513
dbus.String("checker_running"):
514
dbus.Boolean(self.checker is not None,
515
variant_level=1),
516
dbus.String("object_path"):
517
dbus.ObjectPath(self.dbus_object_path,
518
variant_level=1)
519
}, signature="sv")
520
521
# IsStillValid - method
522
IsStillValid = (dbus.service.method(_interface, out_signature="b")
523
(still_valid))
524
IsStillValid.__name__ = "IsStillValid"
525
526
# PropertyChanged - signal
527
@dbus.service.signal(_interface, signature="sv")
528
def PropertyChanged(self, property, value):
529
"D-Bus signal"
530
pass
531
532
# SetChecker - method
533
@dbus.service.method(_interface, in_signature="s")
534
def SetChecker(self, checker):
535
"D-Bus setter method"
536
self.checker_command = checker
537
# Emit D-Bus signal
538
self.PropertyChanged(dbus.String(u"checker"),
539
dbus.String(self.checker_command,
540
variant_level=1))
541
542
# SetHost - method
543
@dbus.service.method(_interface, in_signature="s")
544
def SetHost(self, host):
545
"D-Bus setter method"
546
self.host = host
547
# Emit D-Bus signal
548
self.PropertyChanged(dbus.String(u"host"),
549
dbus.String(self.host, variant_level=1))
550
551
# SetInterval - method
552
@dbus.service.method(_interface, in_signature="t")
553
def SetInterval(self, milliseconds):
554
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
555
# Emit D-Bus signal
556
self.PropertyChanged(dbus.String(u"interval"),
557
(dbus.UInt64(self.interval_milliseconds(),
558
variant_level=1)))
559
560
# SetSecret - method
561
@dbus.service.method(_interface, in_signature="ay",
562
byte_arrays=True)
563
def SetSecret(self, secret):
564
"D-Bus setter method"
565
self.secret = str(secret)
566
567
# SetTimeout - method
568
@dbus.service.method(_interface, in_signature="t")
569
def SetTimeout(self, milliseconds):
570
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
571
# Emit D-Bus signal
572
self.PropertyChanged(dbus.String(u"timeout"),
573
(dbus.UInt64(self.timeout_milliseconds(),
574
variant_level=1)))
575
576
# Enable - method
577
Enable = dbus.service.method(_interface)(enable)
578
Enable.__name__ = "Enable"
579
580
# StartChecker - method
581
@dbus.service.method(_interface)
582
def StartChecker(self):
583
"D-Bus method"
584
self.start_checker()
585
586
# Disable - method
587
@dbus.service.method(_interface)
588
def Disable(self):
589
"D-Bus method"
590
self.disable()
591
592
# StopChecker - method
593
StopChecker = dbus.service.method(_interface)(stop_checker)
594
StopChecker.__name__ = "StopChecker"
595
596
del _interface
255
return now < (self.last_seen + self.timeout)
597
256
598
257
599
258
def peer_certificate(session):
600
"Return the peer's OpenPGP certificate as a bytestring"
601
259
# If not an OpenPGP certificate...
602
if (gnutls.library.functions
603
.gnutls_certificate_type_get(session._c_object)
604
!= 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:
605
263
# ...do the normal thing
606
264
return session.peer_certificate
607
list_size = ctypes.c_uint(1)
608
cert_list = (gnutls.library.functions
609
.gnutls_certificate_get_peers
610
(session._c_object, ctypes.byref(list_size)))
611
if not bool(cert_list) and list_size.value != 0:
612
raise gnutls.errors.GNUTLSError("error getting peer"
613
" 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))
614
268
if list_size.value == 0:
615
269
return None
616
270
cert = cert_list[0]
618
272
619
273
620
274
def fingerprint(openpgp):
621
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
622
# New GnuTLS "datum" with the OpenPGP public key
623
datum = (gnutls.library.types
624
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
625
ctypes.POINTER
626
(ctypes.c_ubyte)),
627
ctypes.c_uint(len(openpgp))))
628
275
# New empty GnuTLS certificate
629
276
crt = gnutls.library.types.gnutls_openpgp_crt_t()
630
(gnutls.library.functions
631
.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)))
632
284
# Import the OpenPGP public key into the certificate
633
(gnutls.library.functions
634
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
635
gnutls.library.constants
636
.GNUTLS_OPENPGP_FMT_RAW))
637
# Verify the self signature in the key
638
crtverify = ctypes.c_uint()
639
(gnutls.library.functions
640
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
641
if crtverify.value != 0:
642
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
643
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)
644
289
# New buffer for the fingerprint
645
buf = ctypes.create_string_buffer(20)
646
buf_len = ctypes.c_size_t()
290
buffer = ctypes.create_string_buffer(20)
291
buffer_length = ctypes.c_size_t()
647
292
# Get the fingerprint from the certificate into the buffer
648
(gnutls.library.functions
649
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
650
ctypes.byref(buf_len)))
293
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
294
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
651
295
# Deinit the certificate
652
296
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
653
297
# Convert the buffer to a Python bytestring
654
fpr = ctypes.string_at(buf, buf_len.value)
298
fpr = ctypes.string_at(buffer, buffer_length.value)
655
299
# Convert the bytestring to hexadecimal notation
656
300
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
657
301
return hex_fpr
658
302
659
303
660
class TCP_handler(SocketServer.BaseRequestHandler, object):
304
class tcp_handler(SocketServer.BaseRequestHandler, object):
661
305
"""A TCP request handler class.
662
306
Instantiated by IPv6_TCPServer for each request to handle it.
663
307
Note: This will run in its own forked process."""
664
308
665
309
def handle(self):
666
logger.info(u"TCP connection from: %s",
667
unicode(self.client_address))
668
session = (gnutls.connection
669
.ClientSession(self.request,
670
gnutls.connection
671
.X509Credentials()))
672
673
line = self.request.makefile().readline()
674
logger.debug(u"Protocol version: %r", line)
675
try:
676
if int(line.strip().split()[0]) > 1:
677
raise RuntimeError
678
except (ValueError, IndexError, RuntimeError), error:
679
logger.error(u"Unknown protocol version: %s", error)
680
return
681
682
# Note: gnutls.connection.X509Credentials is really a generic
683
# GnuTLS certificate credentials object so long as no X.509
684
# keys are added to it. Therefore, we can use it here despite
685
# 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())
686
315
687
316
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
688
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
689
# "+DHE-DSS"))
690
# Use a fallback default, since this MUST be set.
691
priority = self.server.settings.get("priority", "NORMAL")
692
(gnutls.library.functions
693
.gnutls_priority_set_direct(session._c_object,
694
priority, None))
317
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
318
# "+DHE-DSS"))
319
priority = "SECURE256"
320
321
gnutls.library.functions.gnutls_priority_set_direct\
322
(session._c_object, priority, None);
695
323
696
324
try:
697
325
session.handshake()
698
326
except gnutls.errors.GNUTLSError, error:
699
logger.warning(u"Handshake failed: %s", error)
327
logger.debug(u"Handshake failed: %s", error)
700
328
# Do not run session.bye() here: the session is not
701
329
# established. Just abandon the request.
702
330
return
703
logger.debug(u"Handshake succeeded")
704
331
try:
705
332
fpr = fingerprint(peer_certificate(session))
706
333
except (TypeError, gnutls.errors.GNUTLSError), error:
707
logger.warning(u"Bad certificate: %s", error)
334
logger.debug(u"Bad certificate: %s", error)
708
335
session.bye()
709
336
return
710
337
logger.debug(u"Fingerprint: %s", fpr)
711
712
for c in self.server.clients:
338
client = None
339
for c in clients:
713
340
if c.fingerprint == fpr:
714
341
client = c
715
342
break
716
else:
717
logger.warning(u"Client not found for fingerprint: %s",
718
fpr)
719
session.bye()
720
return
721
343
# Have to check if client.still_valid(), since it is possible
722
344
# that the client timed out while establishing the GnuTLS
723
345
# session.
724
if not client.still_valid():
725
logger.warning(u"Client %(name)s is invalid",
726
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)
727
353
session.bye()
728
354
return
729
## This won't work here, since we're in a fork.
730
# client.checked_ok()
731
355
sent_size = 0
732
356
while sent_size < len(client.secret):
733
357
sent = session.send(client.secret[sent_size:])
738
362
session.bye()
739
363
740
364
741
class IPv6_TCPServer(SocketServer.ForkingMixIn,
742
SocketServer.TCPServer, object):
743
"""IPv6-capable TCP server. Accepts 'None' as address and/or port.
365
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
366
"""IPv6 TCP server. Accepts 'None' as address and/or port.
744
367
Attributes:
745
settings: Server settings
368
options: Command line options
746
369
clients: Set() of Client objects
747
enabled: Boolean; whether this server is activated yet
748
370
"""
749
371
address_family = socket.AF_INET6
750
372
def __init__(self, *args, **kwargs):
751
if "settings" in kwargs:
752
self.settings = kwargs["settings"]
753
del kwargs["settings"]
373
if "options" in kwargs:
374
self.options = kwargs["options"]
375
del kwargs["options"]
754
376
if "clients" in kwargs:
755
377
self.clients = kwargs["clients"]
756
378
del kwargs["clients"]
757
if "use_ipv6" in kwargs:
758
if not kwargs["use_ipv6"]:
759
self.address_family = socket.AF_INET
760
del kwargs["use_ipv6"]
761
self.enabled = False
762
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
379
return super(type(self), self).__init__(*args, **kwargs)
763
380
def server_bind(self):
764
381
"""This overrides the normal server_bind() function
765
382
to bind to an interface if one was specified, and also NOT to
766
383
bind to an address or port if they were not specified."""
767
if self.settings["interface"]:
768
# 25 is from /usr/include/asm-i486/socket.h
769
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
770
388
try:
771
389
self.socket.setsockopt(socket.SOL_SOCKET,
772
SO_BINDTODEVICE,
773
self.settings["interface"])
390
socket.SO_BINDTODEVICE,
391
self.options.interface)
774
392
except socket.error, error:
775
393
if error[0] == errno.EPERM:
776
logger.error(u"No permission to"
777
u" bind to interface %s",
778
self.settings["interface"])
394
logger.warning(u"No permission to"
395
u" bind to interface %s",
396
self.options.interface)
779
397
else:
780
raise
398
raise error
781
399
# Only bind(2) the socket if we really need to.
782
400
if self.server_address[0] or self.server_address[1]:
783
401
if not self.server_address[0]:
784
if self.address_family == socket.AF_INET6:
785
any_address = "::" # in6addr_any
786
else:
787
any_address = socket.INADDR_ANY
788
self.server_address = (any_address,
402
in6addr_any = "::"
403
self.server_address = (in6addr_any,
789
404
self.server_address[1])
790
elif not self.server_address[1]:
405
elif self.server_address[1] is None:
791
406
self.server_address = (self.server_address[0],
792
407
0)
793
# if self.settings["interface"]:
794
# self.server_address = (self.server_address[0],
795
# 0, # port
796
# 0, # flowinfo
797
# if_nametoindex
798
# (self.settings
799
# ["interface"]))
800
return super(IPv6_TCPServer, self).server_bind()
801
def server_activate(self):
802
if self.enabled:
803
return super(IPv6_TCPServer, self).server_activate()
804
def enable(self):
805
self.enabled = True
408
return super(type(self), self).server_bind()
806
409
807
410
808
411
def string_to_delta(interval):
809
412
"""Parse a string and return a datetime.timedelta
810
413
811
414
>>> string_to_delta('7d')
812
415
datetime.timedelta(7)
813
416
>>> string_to_delta('60s')
818
421
datetime.timedelta(1)
819
422
>>> string_to_delta(u'1w')
820
423
datetime.timedelta(7)
821
>>> string_to_delta('5m 30s')
822
datetime.timedelta(0, 330)
823
424
"""
824
timevalue = datetime.timedelta(0)
825
for s in interval.split():
826
try:
827
suffix = unicode(s[-1])
828
value = int(s[:-1])
829
if suffix == u"d":
830
delta = datetime.timedelta(value)
831
elif suffix == u"s":
832
delta = datetime.timedelta(0, value)
833
elif suffix == u"m":
834
delta = datetime.timedelta(0, 0, 0, 0, value)
835
elif suffix == u"h":
836
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
837
elif suffix == u"w":
838
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
839
else:
840
raise ValueError
841
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:
842
439
raise ValueError
843
timevalue += delta
844
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()
845
476
846
477
847
478
def server_state_changed(state):
848
"""Derived from the Avahi example code"""
479
"""From the Avahi server example code"""
849
480
if state == avahi.SERVER_COLLISION:
850
logger.error(u"Zeroconf server name collision")
851
service.remove()
481
logger.warning(u"Server name collision")
482
remove_service()
852
483
elif state == avahi.SERVER_RUNNING:
853
service.add()
484
add_service()
854
485
855
486
856
487
def entry_group_state_changed(state, error):
857
"""Derived from the Avahi example code"""
858
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)
859
492
860
493
if state == avahi.ENTRY_GROUP_ESTABLISHED:
861
logger.debug(u"Zeroconf service established.")
494
logger.debug(u"Service established.")
862
495
elif state == avahi.ENTRY_GROUP_COLLISION:
863
logger.warning(u"Zeroconf service name collision.")
864
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()
865
510
elif state == avahi.ENTRY_GROUP_FAILURE:
866
logger.critical(u"Avahi: Error in group state changed %s",
867
unicode(error))
868
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
869
516
870
517
def if_nametoindex(interface):
871
"""Call the C function if_nametoindex(), or equivalent"""
872
global if_nametoindex
518
"""Call the C function if_nametoindex()"""
873
519
try:
874
if_nametoindex = (ctypes.cdll.LoadLibrary
875
(ctypes.util.find_library("c"))
876
.if_nametoindex)
520
libc = ctypes.cdll.LoadLibrary("libc.so.6")
521
return libc.if_nametoindex(interface)
877
522
except (OSError, AttributeError):
878
523
if "struct" not in sys.modules:
879
524
import struct
880
525
if "fcntl" not in sys.modules:
881
526
import fcntl
882
def if_nametoindex(interface):
883
"Get an interface index the hard way, i.e. using fcntl()"
884
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
885
with closing(socket.socket()) as s:
886
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
887
struct.pack("16s16x", interface))
888
interface_index = struct.unpack("I", ifreq[16:20])[0]
889
return interface_index
890
return if_nametoindex(interface)
891
892
893
def daemon(nochdir = False, noclose = False):
894
"""See daemon(3). Standard BSD Unix function.
895
This should really exist as os.daemon, but it doesn't (yet)."""
896
if os.fork():
897
sys.exit()
898
os.setsid()
899
if not nochdir:
900
os.chdir("/")
901
if os.fork():
902
sys.exit()
903
if not noclose:
904
# Close all standard open file descriptors
905
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
906
if not stat.S_ISCHR(os.fstat(null).st_mode):
907
raise OSError(errno.ENODEV,
908
"/dev/null not a character device")
909
os.dup2(null, sys.stdin.fileno())
910
os.dup2(null, sys.stdout.fileno())
911
os.dup2(null, sys.stderr.fileno())
912
if null > 2:
913
os.close(null)
914
915
916
def main():
917
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()
918
538
parser.add_option("-i", "--interface", type="string",
919
metavar="IF", help="Bind to interface IF")
920
parser.add_option("-a", "--address", type="string",
921
help="Address to listen for requests on")
922
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,
923
554
help="Port number to receive requests on")
924
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,
925
562
help="Run self-test")
926
parser.add_option("--debug", action="store_true",
927
help="Debug mode; run in foreground and log to"
928
" terminal")
929
parser.add_option("--priority", type="string", help="GnuTLS"
930
" priority string (see GnuTLS documentation)")
931
parser.add_option("--servicename", type="string", metavar="NAME",
932
help="Zeroconf service name")
933
parser.add_option("--configdir", type="string",
934
default="/etc/mandos", metavar="DIR",
935
help="Directory to search for configuration"
936
" files")
937
parser.add_option("--no-dbus", action="store_false",
938
dest="use_dbus",
939
help="Do not provide D-Bus system bus"
940
" interface")
941
parser.add_option("--no-ipv6", action="store_false",
942
dest="use_ipv6", help="Do not use IPv6")
943
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()
944
566
945
567
if options.check:
946
568
import doctest
947
569
doctest.testmod()
948
570
sys.exit()
949
571
950
# Default values for config file for server-global settings
951
server_defaults = { "interface": "",
952
"address": "",
953
"port": "",
954
"debug": "False",
955
"priority":
956
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
957
"servicename": "Mandos",
958
"use_dbus": "True",
959
"use_ipv6": "True",
960
}
961
962
# Parse config file for server-global settings
963
server_config = ConfigParser.SafeConfigParser(server_defaults)
964
del server_defaults
965
server_config.read(os.path.join(options.configdir, "mandos.conf"))
966
# Convert the SafeConfigParser object to a dict
967
server_settings = server_config.defaults()
968
# Use the appropriate methods on the non-string config options
969
server_settings["debug"] = server_config.getboolean("DEFAULT",
970
"debug")
971
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
972
"use_dbus")
973
server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
974
"use_ipv6")
975
if server_settings["port"]:
976
server_settings["port"] = server_config.getint("DEFAULT",
977
"port")
978
del server_config
979
980
# Override the settings from the config file with command line
981
# options, if set.
982
for option in ("interface", "address", "port", "debug",
983
"priority", "servicename", "configdir",
984
"use_dbus", "use_ipv6"):
985
value = getattr(options, option)
986
if value is not None:
987
server_settings[option] = value
988
del options
989
# Now we have our good server settings in "server_settings"
990
991
# For convenience
992
debug = server_settings["debug"]
993
use_dbus = server_settings["use_dbus"]
994
use_ipv6 = server_settings["use_ipv6"]
995
996
if not debug:
997
syslogger.setLevel(logging.WARNING)
998
console.setLevel(logging.WARNING)
999
1000
if server_settings["servicename"] != "Mandos":
1001
syslogger.setFormatter(logging.Formatter
1002
('Mandos (%s): %%(levelname)s:'
1003
' %%(message)s'
1004
% server_settings["servicename"]))
1005
1006
# Parse config file with clients
1007
client_defaults = { "timeout": "1h",
1008
"interval": "5m",
1009
"checker": "fping -q -- %%(host)s",
1010
"host": "",
1011
}
1012
client_config = ConfigParser.SafeConfigParser(client_defaults)
1013
client_config.read(os.path.join(server_settings["configdir"],
1014
"clients.conf"))
1015
1016
clients = Set()
1017
tcp_server = IPv6_TCPServer((server_settings["address"],
1018
server_settings["port"]),
1019
TCP_handler,
1020
settings=server_settings,
1021
clients=clients, use_ipv6=use_ipv6)
1022
pidfilename = "/var/run/mandos.pid"
1023
try:
1024
pidfile = open(pidfilename, "w")
1025
except IOError:
1026
logger.error("Could not open file %r", pidfilename)
1027
1028
try:
1029
uid = pwd.getpwnam("_mandos").pw_uid
1030
gid = pwd.getpwnam("_mandos").pw_gid
1031
except KeyError:
1032
try:
1033
uid = pwd.getpwnam("mandos").pw_uid
1034
gid = pwd.getpwnam("mandos").pw_gid
1035
except KeyError:
1036
try:
1037
uid = pwd.getpwnam("nobody").pw_uid
1038
gid = pwd.getpwnam("nogroup").pw_gid
1039
except KeyError:
1040
uid = 65534
1041
gid = 65534
1042
try:
1043
os.setgid(gid)
1044
os.setuid(uid)
1045
except OSError, error:
1046
if error[0] != errno.EPERM:
1047
raise error
1048
1049
# Enable all possible GnuTLS debugging
1050
if debug:
1051
# "Use a log level over 10 to enable all debugging options."
1052
# - GnuTLS manual
1053
gnutls.library.functions.gnutls_global_set_log_level(11)
1054
1055
@gnutls.library.types.gnutls_log_func
1056
def debug_gnutls(level, string):
1057
logger.debug("GnuTLS: %s", string[:-1])
1058
1059
(gnutls.library.functions
1060
.gnutls_global_set_log_function(debug_gnutls))
1061
1062
global service
1063
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1064
service = AvahiService(name = server_settings["servicename"],
1065
servicetype = "_mandos._tcp",
1066
protocol = protocol)
1067
if server_settings["interface"]:
1068
service.interface = (if_nametoindex
1069
(server_settings["interface"]))
1070
1071
global main_loop
1072
global bus
1073
global server
1074
# 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
1075
589
DBusGMainLoop(set_as_default=True )
1076
590
main_loop = gobject.MainLoop()
1077
591
bus = dbus.SystemBus()
1078
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1079
avahi.DBUS_PATH_SERVER),
1080
avahi.DBUS_INTERFACE_SERVER)
592
server = dbus.Interface(
593
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
594
avahi.DBUS_INTERFACE_SERVER )
1081
595
# End of Avahi example code
1082
if use_dbus:
1083
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1084
1085
clients.update(Set(Client(name = section,
1086
config
1087
= dict(client_config.items(section)),
1088
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))))
1089
610
for section in client_config.sections()))
1090
if not clients:
1091
logger.warning(u"No clients defined")
1092
1093
if debug:
1094
# Redirect stdin so all checkers get /dev/null
1095
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1096
os.dup2(null, sys.stdin.fileno())
1097
if null > 2:
1098
os.close(null)
1099
else:
1100
# No console logging
1101
logger.removeHandler(console)
1102
# Close all input and output, do double fork, etc.
1103
daemon()
1104
1105
try:
1106
pid = os.getpid()
1107
pidfile.write(str(pid) + "\n")
1108
pidfile.close()
1109
del pidfile
1110
except IOError:
1111
logger.error(u"Could not write to file %r with PID %d",
1112
pidfilename, pid)
1113
except NameError:
1114
# "pidfile" was never created
1115
pass
1116
del pidfilename
1117
1118
def cleanup():
1119
"Cleanup function; run on exit"
1120
global group
1121
# From the Avahi example code
1122
if not group is None:
1123
group.Free()
1124
group = None
1125
# End of Avahi example code
1126
1127
while clients:
1128
client = clients.pop()
1129
client.disable_hook = None
1130
client.disable()
1131
1132
atexit.register(cleanup)
1133
1134
if not debug:
1135
signal.signal(signal.SIGINT, signal.SIG_IGN)
1136
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1137
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1138
1139
if use_dbus:
1140
class MandosServer(dbus.service.Object):
1141
"""A D-Bus proxy object"""
1142
def __init__(self):
1143
dbus.service.Object.__init__(self, bus, "/")
1144
_interface = u"se.bsnet.fukt.Mandos"
1145
1146
@dbus.service.signal(_interface, signature="oa{sv}")
1147
def ClientAdded(self, objpath, properties):
1148
"D-Bus signal"
1149
pass
1150
1151
@dbus.service.signal(_interface, signature="os")
1152
def ClientRemoved(self, objpath, name):
1153
"D-Bus signal"
1154
pass
1155
1156
@dbus.service.method(_interface, out_signature="ao")
1157
def GetAllClients(self):
1158
"D-Bus method"
1159
return dbus.Array(c.dbus_object_path for c in clients)
1160
1161
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1162
def GetAllClientsWithProperties(self):
1163
"D-Bus method"
1164
return dbus.Dictionary(
1165
((c.dbus_object_path, c.GetAllProperties())
1166
for c in clients),
1167
signature="oa{sv}")
1168
1169
@dbus.service.method(_interface, in_signature="o")
1170
def RemoveClient(self, object_path):
1171
"D-Bus method"
1172
for c in clients:
1173
if c.dbus_object_path == object_path:
1174
clients.remove(c)
1175
# Don't signal anything except ClientRemoved
1176
c.use_dbus = False
1177
c.disable()
1178
# Emit D-Bus signal
1179
self.ClientRemoved(object_path, c.name)
1180
return
1181
raise KeyError
1182
1183
del _interface
1184
1185
mandos_server = MandosServer()
1186
1187
611
for client in clients:
1188
if use_dbus:
1189
# Emit D-Bus signal
1190
mandos_server.ClientAdded(client.dbus_object_path,
1191
client.GetAllProperties())
1192
client.enable()
1193
1194
tcp_server.enable()
1195
tcp_server.server_activate()
1196
1197
# Find out what port we got
1198
service.port = tcp_server.socket.getsockname()[1]
1199
if use_ipv6:
1200
logger.info(u"Now listening on address %r, port %d,"
1201
" flowinfo %d, scope_id %d"
1202
% tcp_server.socket.getsockname())
1203
else: # IPv4
1204
logger.info(u"Now listening on address %r, port %d"
1205
% tcp_server.socket.getsockname())
1206
1207
#service.interface = tcp_server.socket.getsockname()[3]
1208
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)
1209
634
try:
1210
# From the Avahi example code
1211
server.connect_to_signal("StateChanged", server_state_changed)
1212
try:
1213
server_state_changed(server.GetState())
1214
except dbus.exceptions.DBusException, error:
1215
logger.critical(u"DBusException: %s", error)
1216
sys.exit(1)
1217
# End of Avahi example code
1218
1219
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1220
lambda *args, **kwargs:
1221
(tcp_server.handle_request
1222
(*args[2:], **kwargs) or True))
1223
1224
logger.debug(u"Starting main loop")
1225
635
main_loop.run()
1226
except AvahiError, error:
1227
logger.critical(u"AvahiError: %s", error)
1228
sys.exit(1)
1229
636
except KeyboardInterrupt:
1230
if debug:
1231
print >> sys.stderr
1232
logger.debug("Server received KeyboardInterrupt")
1233
logger.debug("Server exiting")
637
print
638
639
# Cleanup here
1234
640
1235
if __name__ == '__main__':
1236
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