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- Committer: Björn Påhlsson
- Date: 2008-07-20 23:34:51 UTC
- mto: This revision was merged to the branch mainline in revision 17.
- Revision ID: belorn@braxen-20080720233451-720put8qyxqvk2ld
Added debug options from passprompt as --debug and --debug=passprompt
- 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
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2
# -*- mode: python; coding: utf-8 -*-
3
#
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# Mandos server - give out binary blobs to connecting clients.
5
#
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# This program is partly derived from an example program for an Avahi
7
# service publisher, downloaded from
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# <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".
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#
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# Everything else is
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# Copyright © 2008,2009 Teddy Hogeborn
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# Copyright © 2008,2009 Björn Påhlsson
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#
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# 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
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# (at your option) any later version.
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#
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# 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
#
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# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
33
3
34
from __future__ import division, with_statement, absolute_import
4
from __future__ import division
35
5
36
6
import SocketServer
37
7
import socket
38
import optparse
8
import select
9
from optparse import OptionParser
39
10
import datetime
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11
import errno
41
12
import gnutls.crypto
53
24
import subprocess
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25
import atexit
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26
import stat
56
import logging
57
import logging.handlers
58
import pwd
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from contextlib import closing
60
27
61
28
import dbus
62
import dbus.service
63
29
import gobject
64
30
import avahi
65
31
from dbus.mainloop.glib import DBusGMainLoop
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32
import ctypes
67
import ctypes.util
68
33
69
version = "1.0.5"
34
import logging
35
import logging.handlers
70
36
71
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logger = logging.Logger('mandos')
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syslogger = (logging.handlers.SysLogHandler
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
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syslogger.setFormatter(logging.Formatter
76
('Mandos: %(levelname)s: %(message)s'))
38
syslogger = logging.handlers.SysLogHandler\
39
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
40
syslogger.setFormatter(logging.Formatter\
41
('%(levelname)s: %(message)s'))
77
42
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>
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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
43
del syslogger
44
45
# This variable is used to optionally bind to a specified interface.
46
# It is a global variable to fit in with the other variables from the
47
# Avahi server example code.
48
serviceInterface = avahi.IF_UNSPEC
49
# From the Avahi server example code:
50
serviceName = "Mandos"
51
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
52
servicePort = None # Not known at startup
53
serviceTXT = [] # TXT record for the service
54
domain = "" # Domain to publish on, default to .local
55
host = "" # Host to publish records for, default to localhost
56
group = None #our entry group
57
rename_count = 12 # Counter so we only rename after collisions a
58
# sensible number of times
170
59
# End of Avahi example code
171
60
172
61
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):
62
class Client(object):
179
63
"""A representation of a client host served by this server.
180
64
Attributes:
181
name: string; from the config file, used in log messages and
182
D-Bus identifiers
65
name: string; from the config file, used in log messages
183
66
fingerprint: string (40 or 32 hexadecimal digits); used to
184
67
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)
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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)
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checker: subprocess.Popen(); a running checker process used
196
to see if the client lives.
197
'None' if no process is running.
68
secret: bytestring; sent verbatim (over TLS) to client
69
fqdn: string (FQDN); available for use by the checker command
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created: datetime.datetime()
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last_seen: datetime.datetime() or None if not yet seen
72
timeout: datetime.timedelta(); How long from last_seen until
73
this client is invalid
74
interval: datetime.timedelta(); How often to start a new checker
75
stop_hook: If set, called by stop() as stop_hook(self)
76
checker: subprocess.Popen(); a running checker process used
77
to see if the client lives.
78
Is None if no process is running.
198
79
checker_initiator_tag: a gobject event source tag, or None
199
disable_initiator_tag: - '' -
80
stop_initiator_tag: - '' -
200
81
checker_callback_tag: - '' -
201
82
checker_command: string; External command which is run to check if
202
client lives. %() expansions are done at
83
client lives. %()s expansions are done at
203
84
runtime with vars(self) as dict, so that for
204
85
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
86
Private attibutes:
87
_timeout: Real variable for 'timeout'
88
_interval: Real variable for 'interval'
89
_timeout_milliseconds: Used by gobject.timeout_add()
90
_interval_milliseconds: - '' -
207
91
"""
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."""
92
def _set_timeout(self, timeout):
93
"Setter function for 'timeout' attribute"
94
self._timeout = timeout
95
self._timeout_milliseconds = ((self.timeout.days
96
* 24 * 60 * 60 * 1000)
97
+ (self.timeout.seconds * 1000)
98
+ (self.timeout.microseconds
99
// 1000))
100
timeout = property(lambda self: self._timeout,
101
_set_timeout)
102
del _set_timeout
103
def _set_interval(self, interval):
104
"Setter function for 'interval' attribute"
105
self._interval = interval
106
self._interval_milliseconds = ((self.interval.days
107
* 24 * 60 * 60 * 1000)
108
+ (self.interval.seconds
109
* 1000)
110
+ (self.interval.microseconds
111
// 1000))
112
interval = property(lambda self: self._interval,
113
_set_interval)
114
del _set_interval
115
def __init__(self, name=None, options=None, stop_hook=None,
116
fingerprint=None, secret=None, secfile=None,
117
fqdn=None, timeout=None, interval=-1, checker=None):
225
118
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
119
# Uppercase and remove spaces from fingerprint
120
# for later comparison purposes with return value of
121
# the fingerprint() function
122
self.fingerprint = fingerprint.upper().replace(u" ", u"")
123
if secret:
124
self.secret = secret.decode(u"base64")
125
elif secfile:
126
sf = open(secfile)
127
self.secret = sf.read()
128
sf.close()
129
else:
130
raise RuntimeError(u"No secret or secfile for client %s"
131
% self.name)
132
self.fqdn = fqdn # string
133
self.created = datetime.datetime.now()
134
self.last_seen = None
135
if timeout is None:
136
self.timeout = options.timeout
137
else:
138
self.timeout = string_to_delta(timeout)
139
if interval == -1:
140
self.interval = options.interval
141
else:
142
self.interval = string_to_delta(interval)
143
self.stop_hook = stop_hook
254
144
self.checker = None
255
145
self.checker_initiator_tag = None
256
self.disable_initiator_tag = None
146
self.stop_initiator_tag = None
257
147
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()
148
self.check_command = checker
149
def start(self):
150
"""Start this clients checker and timeout hooks"""
273
151
# Schedule a new checker to be started an 'interval' from now,
274
152
# and every interval from then on.
275
self.checker_initiator_tag = (gobject.timeout_add
276
(self.interval_milliseconds(),
277
self.start_checker))
153
self.checker_initiator_tag = gobject.timeout_add\
154
(self._interval_milliseconds,
155
self.start_checker)
278
156
# Also start a new checker *right now*.
279
157
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):
158
# Schedule a stop() when 'timeout' has passed
159
self.stop_initiator_tag = gobject.timeout_add\
160
(self._timeout_milliseconds,
161
self.stop)
162
def stop(self):
163
"""Stop this client.
164
The possibility that this client might be restarted is left
165
open, but not currently used."""
166
logger.debug(u"Stopping client %s", self.name)
167
self.secret = None
168
if self.stop_initiator_tag:
169
gobject.source_remove(self.stop_initiator_tag)
170
self.stop_initiator_tag = None
171
if self.checker_initiator_tag:
302
172
gobject.source_remove(self.checker_initiator_tag)
303
173
self.checker_initiator_tag = None
304
174
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))
175
if self.stop_hook:
176
self.stop_hook(self)
312
177
# Do not run this again if called by a gobject.timeout_add
313
178
return False
314
315
179
def __del__(self):
316
self.disable_hook = None
317
self.disable()
318
319
def checker_callback(self, pid, condition, command):
180
# Some code duplication here and in stop()
181
if hasattr(self, "stop_initiator_tag") \
182
and self.stop_initiator_tag:
183
gobject.source_remove(self.stop_initiator_tag)
184
self.stop_initiator_tag = None
185
if hasattr(self, "checker_initiator_tag") \
186
and self.checker_initiator_tag:
187
gobject.source_remove(self.checker_initiator_tag)
188
self.checker_initiator_tag = None
189
self.stop_checker()
190
def checker_callback(self, pid, condition):
320
191
"""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:
192
now = datetime.datetime.now()
193
if os.WIFEXITED(condition) \
194
and (os.WEXITSTATUS(condition) == 0):
195
logger.debug(u"Checker for %(name)s succeeded",
196
vars(self))
197
self.last_seen = now
198
gobject.source_remove(self.stop_initiator_tag)
199
self.stop_initiator_tag = gobject.timeout_add\
200
(self._timeout_milliseconds,
201
self.stop)
202
elif not os.WIFEXITED(condition):
342
203
logger.warning(u"Checker for %(name)s crashed?",
343
204
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
205
else:
206
logger.debug(u"Checker for %(name)s failed",
207
vars(self))
208
self.checker = None
209
self.checker_callback_tag = None
367
210
def start_checker(self):
368
211
"""Start a new checker subprocess if one is not running.
369
212
If a checker already exists, leave it running and do
370
213
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
214
if self.checker is None:
380
215
try:
381
# In case checker_command has exactly one % operator
382
command = self.checker_command % self.host
216
command = self.check_command % self.fqdn
383
217
except TypeError:
384
# Escape attributes for the shell
385
218
escaped_attrs = dict((key, re.escape(str(val)))
386
219
for key, val in
387
220
vars(self).iteritems())
388
221
try:
389
command = self.checker_command % escaped_attrs
222
command = self.check_command % escaped_attrs
390
223
except TypeError, error:
391
logger.error(u'Could not format string "%s":'
392
u' %s', self.checker_command, error)
224
logger.critical(u'Could not format string "%s":'
225
u' %s', self.check_command, error)
393
226
return True # Try again later
394
227
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:
228
logger.debug(u"Starting checker %r for %s",
229
command, self.name)
230
self.checker = subprocess.\
231
Popen(command,
232
close_fds=True, shell=True,
233
cwd="/")
234
self.checker_callback_tag = gobject.child_watch_add\
235
(self.checker.pid,
236
self.checker_callback)
237
except subprocess.OSError, error:
415
238
logger.error(u"Failed to start subprocess: %s",
416
239
error)
417
240
# Re-run this periodically if run by gobject.timeout_add
418
241
return True
419
420
242
def stop_checker(self):
421
243
"""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:
244
if not hasattr(self, "checker") or self.checker is None:
426
245
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
246
gobject.source_remove(self.checker_callback_tag)
247
self.checker_callback_tag = None
248
os.kill(self.checker.pid, signal.SIGTERM)
249
if self.checker.poll() is None:
250
os.kill(self.checker.pid, signal.SIGKILL)
436
251
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):
252
def still_valid(self, now=None):
442
253
"""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:
254
if now is None:
255
now = datetime.datetime.now()
256
if self.last_seen is None:
447
257
return now < (self.created + self.timeout)
448
258
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
259
return now < (self.last_seen + self.timeout)
588
260
589
261
590
262
def peer_certificate(session):
591
"Return the peer's OpenPGP certificate as a bytestring"
263
"Return an OpenPGP data packet string for the peer's certificate"
592
264
# 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):
265
if gnutls.library.functions.gnutls_certificate_type_get\
266
(session._c_object) \
267
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
596
268
# ...do the normal thing
597
269
return session.peer_certificate
598
270
list_size = ctypes.c_uint()
599
cert_list = (gnutls.library.functions
600
.gnutls_certificate_get_peers
601
(session._c_object, ctypes.byref(list_size)))
271
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
272
(session._c_object, ctypes.byref(list_size))
602
273
if list_size.value == 0:
603
274
return None
604
275
cert = cert_list[0]
606
277
607
278
608
279
def fingerprint(openpgp):
609
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
610
# New GnuTLS "datum" with the OpenPGP public key
611
datum = (gnutls.library.types
612
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
613
ctypes.POINTER
614
(ctypes.c_ubyte)),
615
ctypes.c_uint(len(openpgp))))
280
"Convert an OpenPGP data string to a hexdigit fingerprint string"
616
281
# New empty GnuTLS certificate
617
282
crt = gnutls.library.types.gnutls_openpgp_crt_t()
618
(gnutls.library.functions
619
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
283
gnutls.library.functions.gnutls_openpgp_crt_init\
284
(ctypes.byref(crt))
285
# New GnuTLS "datum" with the OpenPGP public key
286
datum = gnutls.library.types.gnutls_datum_t\
287
(ctypes.cast(ctypes.c_char_p(openpgp),
288
ctypes.POINTER(ctypes.c_ubyte)),
289
ctypes.c_uint(len(openpgp)))
620
290
# Import the OpenPGP public key into the certificate
621
(gnutls.library.functions
622
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
623
gnutls.library.constants
624
.GNUTLS_OPENPGP_FMT_RAW))
625
# Verify the self signature in the key
626
crtverify = ctypes.c_uint()
627
(gnutls.library.functions
628
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
629
if crtverify.value != 0:
630
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
631
raise gnutls.errors.CertificateSecurityError("Verify failed")
291
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
292
(crt,
293
ctypes.byref(datum),
294
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
632
295
# New buffer for the fingerprint
633
buf = ctypes.create_string_buffer(20)
634
buf_len = ctypes.c_size_t()
296
buffer = ctypes.create_string_buffer(20)
297
buffer_length = ctypes.c_size_t()
635
298
# Get the fingerprint from the certificate into the buffer
636
(gnutls.library.functions
637
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
638
ctypes.byref(buf_len)))
299
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
300
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
639
301
# Deinit the certificate
640
302
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
641
303
# Convert the buffer to a Python bytestring
642
fpr = ctypes.string_at(buf, buf_len.value)
304
fpr = ctypes.string_at(buffer, buffer_length.value)
643
305
# Convert the bytestring to hexadecimal notation
644
306
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
645
307
return hex_fpr
646
308
647
309
648
class TCP_handler(SocketServer.BaseRequestHandler, object):
310
class tcp_handler(SocketServer.BaseRequestHandler, object):
649
311
"""A TCP request handler class.
650
312
Instantiated by IPv6_TCPServer for each request to handle it.
651
313
Note: This will run in its own forked process."""
652
314
653
315
def handle(self):
654
logger.info(u"TCP connection from: %s",
655
unicode(self.client_address))
656
session = (gnutls.connection
657
.ClientSession(self.request,
658
gnutls.connection
659
.X509Credentials()))
660
661
line = self.request.makefile().readline()
662
logger.debug(u"Protocol version: %r", line)
663
try:
664
if int(line.strip().split()[0]) > 1:
665
raise RuntimeError
666
except (ValueError, IndexError, RuntimeError), error:
667
logger.error(u"Unknown protocol version: %s", error)
668
return
669
670
# Note: gnutls.connection.X509Credentials is really a generic
671
# GnuTLS certificate credentials object so long as no X.509
672
# keys are added to it. Therefore, we can use it here despite
673
# using OpenPGP certificates.
316
logger.debug(u"TCP connection from: %s",
317
unicode(self.client_address))
318
session = gnutls.connection.ClientSession(self.request,
319
gnutls.connection.\
320
X509Credentials())
674
321
675
322
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
676
323
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
677
324
# "+DHE-DSS"))
678
# Use a fallback default, since this MUST be set.
679
priority = self.server.settings.get("priority", "NORMAL")
680
(gnutls.library.functions
681
.gnutls_priority_set_direct(session._c_object,
682
priority, None))
325
priority = "SECURE256"
326
327
gnutls.library.functions.gnutls_priority_set_direct\
328
(session._c_object, priority, None);
683
329
684
330
try:
685
331
session.handshake()
686
332
except gnutls.errors.GNUTLSError, error:
687
logger.warning(u"Handshake failed: %s", error)
333
logger.debug(u"Handshake failed: %s", error)
688
334
# Do not run session.bye() here: the session is not
689
335
# established. Just abandon the request.
690
336
return
691
337
try:
692
338
fpr = fingerprint(peer_certificate(session))
693
339
except (TypeError, gnutls.errors.GNUTLSError), error:
694
logger.warning(u"Bad certificate: %s", error)
340
logger.debug(u"Bad certificate: %s", error)
695
341
session.bye()
696
342
return
697
343
logger.debug(u"Fingerprint: %s", fpr)
698
for c in self.server.clients:
344
client = None
345
for c in clients:
699
346
if c.fingerprint == fpr:
700
347
client = c
701
348
break
702
else:
703
logger.warning(u"Client not found for fingerprint: %s",
704
fpr)
705
session.bye()
706
return
707
349
# Have to check if client.still_valid(), since it is possible
708
350
# that the client timed out while establishing the GnuTLS
709
351
# session.
710
if not client.still_valid():
711
logger.warning(u"Client %(name)s is invalid",
712
vars(client))
352
if (not client) or (not client.still_valid()):
353
if client:
354
logger.debug(u"Client %(name)s is invalid",
355
vars(client))
356
else:
357
logger.debug(u"Client not found for fingerprint: %s",
358
fpr)
713
359
session.bye()
714
360
return
715
## This won't work here, since we're in a fork.
716
# client.checked_ok()
717
361
sent_size = 0
718
362
while sent_size < len(client.secret):
719
363
sent = session.send(client.secret[sent_size:])
724
368
session.bye()
725
369
726
370
727
class IPv6_TCPServer(SocketServer.ForkingMixIn,
728
SocketServer.TCPServer, object):
371
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
729
372
"""IPv6 TCP server. Accepts 'None' as address and/or port.
730
373
Attributes:
731
settings: Server settings
374
options: Command line options
732
375
clients: Set() of Client objects
733
enabled: Boolean; whether this server is activated yet
734
376
"""
735
377
address_family = socket.AF_INET6
736
378
def __init__(self, *args, **kwargs):
737
if "settings" in kwargs:
738
self.settings = kwargs["settings"]
739
del kwargs["settings"]
379
if "options" in kwargs:
380
self.options = kwargs["options"]
381
del kwargs["options"]
740
382
if "clients" in kwargs:
741
383
self.clients = kwargs["clients"]
742
384
del kwargs["clients"]
743
self.enabled = False
744
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
385
return super(type(self), self).__init__(*args, **kwargs)
745
386
def server_bind(self):
746
387
"""This overrides the normal server_bind() function
747
388
to bind to an interface if one was specified, and also NOT to
748
389
bind to an address or port if they were not specified."""
749
if self.settings["interface"]:
750
# 25 is from /usr/include/asm-i486/socket.h
751
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
390
if self.options.interface:
391
if not hasattr(socket, "SO_BINDTODEVICE"):
392
# From /usr/include/asm-i486/socket.h
393
socket.SO_BINDTODEVICE = 25
752
394
try:
753
395
self.socket.setsockopt(socket.SOL_SOCKET,
754
SO_BINDTODEVICE,
755
self.settings["interface"])
396
socket.SO_BINDTODEVICE,
397
self.options.interface)
756
398
except socket.error, error:
757
399
if error[0] == errno.EPERM:
758
logger.error(u"No permission to"
759
u" bind to interface %s",
760
self.settings["interface"])
400
logger.warning(u"No permission to"
401
u" bind to interface %s",
402
self.options.interface)
761
403
else:
762
404
raise error
763
405
# Only bind(2) the socket if we really need to.
766
408
in6addr_any = "::"
767
409
self.server_address = (in6addr_any,
768
410
self.server_address[1])
769
elif not self.server_address[1]:
411
elif self.server_address[1] is None:
770
412
self.server_address = (self.server_address[0],
771
413
0)
772
# if self.settings["interface"]:
773
# self.server_address = (self.server_address[0],
774
# 0, # port
775
# 0, # flowinfo
776
# if_nametoindex
777
# (self.settings
778
# ["interface"]))
779
return super(IPv6_TCPServer, self).server_bind()
780
def server_activate(self):
781
if self.enabled:
782
return super(IPv6_TCPServer, self).server_activate()
783
def enable(self):
784
self.enabled = True
414
return super(type(self), self).server_bind()
785
415
786
416
787
417
def string_to_delta(interval):
797
427
datetime.timedelta(1)
798
428
>>> string_to_delta(u'1w')
799
429
datetime.timedelta(7)
800
>>> string_to_delta('5m 30s')
801
datetime.timedelta(0, 330)
802
430
"""
803
timevalue = datetime.timedelta(0)
804
for s in interval.split():
805
try:
806
suffix = unicode(s[-1])
807
value = int(s[:-1])
808
if suffix == u"d":
809
delta = datetime.timedelta(value)
810
elif suffix == u"s":
811
delta = datetime.timedelta(0, value)
812
elif suffix == u"m":
813
delta = datetime.timedelta(0, 0, 0, 0, value)
814
elif suffix == u"h":
815
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
816
elif suffix == u"w":
817
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
818
else:
819
raise ValueError
820
except (ValueError, IndexError):
431
try:
432
suffix=unicode(interval[-1])
433
value=int(interval[:-1])
434
if suffix == u"d":
435
delta = datetime.timedelta(value)
436
elif suffix == u"s":
437
delta = datetime.timedelta(0, value)
438
elif suffix == u"m":
439
delta = datetime.timedelta(0, 0, 0, 0, value)
440
elif suffix == u"h":
441
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
442
elif suffix == u"w":
443
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
444
else:
821
445
raise ValueError
822
timevalue += delta
823
return timevalue
446
except (ValueError, IndexError):
447
raise ValueError
448
return delta
449
450
451
def add_service():
452
"""From the Avahi server example code"""
453
global group, serviceName, serviceType, servicePort, serviceTXT, \
454
domain, host
455
if group is None:
456
group = dbus.Interface(
457
bus.get_object( avahi.DBUS_NAME,
458
server.EntryGroupNew()),
459
avahi.DBUS_INTERFACE_ENTRY_GROUP)
460
group.connect_to_signal('StateChanged',
461
entry_group_state_changed)
462
logger.debug(u"Adding service '%s' of type '%s' ...",
463
serviceName, serviceType)
464
465
group.AddService(
466
serviceInterface, # interface
467
avahi.PROTO_INET6, # protocol
468
dbus.UInt32(0), # flags
469
serviceName, serviceType,
470
domain, host,
471
dbus.UInt16(servicePort),
472
avahi.string_array_to_txt_array(serviceTXT))
473
group.Commit()
474
475
476
def remove_service():
477
"""From the Avahi server example code"""
478
global group
479
480
if not group is None:
481
group.Reset()
824
482
825
483
826
484
def server_state_changed(state):
827
"""Derived from the Avahi example code"""
485
"""From the Avahi server example code"""
828
486
if state == avahi.SERVER_COLLISION:
829
logger.error(u"Zeroconf server name collision")
830
service.remove()
487
logger.warning(u"Server name collision")
488
remove_service()
831
489
elif state == avahi.SERVER_RUNNING:
832
service.add()
490
add_service()
833
491
834
492
835
493
def entry_group_state_changed(state, error):
836
"""Derived from the Avahi example code"""
837
logger.debug(u"Avahi state change: %i", state)
494
"""From the Avahi server example code"""
495
global serviceName, server, rename_count
496
497
logger.debug(u"state change: %i", state)
838
498
839
499
if state == avahi.ENTRY_GROUP_ESTABLISHED:
840
logger.debug(u"Zeroconf service established.")
500
logger.debug(u"Service established.")
841
501
elif state == avahi.ENTRY_GROUP_COLLISION:
842
logger.warning(u"Zeroconf service name collision.")
843
service.rename()
502
503
rename_count = rename_count - 1
504
if rename_count > 0:
505
name = server.GetAlternativeServiceName(name)
506
logger.warning(u"Service name collision, "
507
u"changing name to '%s' ...", name)
508
remove_service()
509
add_service()
510
511
else:
512
logger.error(u"No suitable service name found after %i"
513
u" retries, exiting.", n_rename)
514
killme(1)
844
515
elif state == avahi.ENTRY_GROUP_FAILURE:
845
logger.critical(u"Avahi: Error in group state changed %s",
846
unicode(error))
847
raise AvahiGroupError(u"State changed: %s" % unicode(error))
516
logger.error(u"Error in group state changed %s",
517
unicode(error))
518
killme(1)
519
848
520
849
521
def if_nametoindex(interface):
850
"""Call the C function if_nametoindex(), or equivalent"""
851
global if_nametoindex
522
"""Call the C function if_nametoindex()"""
852
523
try:
853
if_nametoindex = (ctypes.cdll.LoadLibrary
854
(ctypes.util.find_library("c"))
855
.if_nametoindex)
524
libc = ctypes.cdll.LoadLibrary("libc.so.6")
525
return libc.if_nametoindex(interface)
856
526
except (OSError, AttributeError):
857
527
if "struct" not in sys.modules:
858
528
import struct
859
529
if "fcntl" not in sys.modules:
860
530
import fcntl
861
def if_nametoindex(interface):
862
"Get an interface index the hard way, i.e. using fcntl()"
863
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
864
with closing(socket.socket()) as s:
865
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
866
struct.pack("16s16x", interface))
867
interface_index = struct.unpack("I", ifreq[16:20])[0]
868
return interface_index
869
return if_nametoindex(interface)
870
871
872
def daemon(nochdir = False, noclose = False):
531
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
532
s = socket.socket()
533
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
534
struct.pack("16s16x", interface))
535
s.close()
536
interface_index = struct.unpack("I", ifreq[16:20])[0]
537
return interface_index
538
539
540
def daemon(nochdir, noclose):
873
541
"""See daemon(3). Standard BSD Unix function.
874
542
This should really exist as os.daemon, but it doesn't (yet)."""
875
543
if os.fork():
877
545
os.setsid()
878
546
if not nochdir:
879
547
os.chdir("/")
880
if os.fork():
881
sys.exit()
882
548
if not noclose:
883
549
# Close all standard open file descriptors
884
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
550
null = os.open("/dev/null", os.O_NOCTTY | os.O_RDWR)
885
551
if not stat.S_ISCHR(os.fstat(null).st_mode):
886
552
raise OSError(errno.ENODEV,
887
553
"/dev/null not a character device")
892
558
os.close(null)
893
559
894
560
895
def main():
896
parser = optparse.OptionParser(version = "%%prog %s" % version)
561
def killme(status = 0):
562
logger.debug("Stopping server with exit status %d", status)
563
exitstatus = status
564
if main_loop_started:
565
main_loop.quit()
566
else:
567
sys.exit(status)
568
569
570
if __name__ == '__main__':
571
exitstatus = 0
572
main_loop_started = False
573
parser = OptionParser()
897
574
parser.add_option("-i", "--interface", type="string",
898
metavar="IF", help="Bind to interface IF")
899
parser.add_option("-a", "--address", type="string",
900
help="Address to listen for requests on")
901
parser.add_option("-p", "--port", type="int",
575
default=None, metavar="IF",
576
help="Bind to interface IF")
577
parser.add_option("-p", "--port", type="int", default=None,
902
578
help="Port number to receive requests on")
903
parser.add_option("--check", action="store_true",
579
parser.add_option("--timeout", type="string", # Parsed later
580
default="1h",
581
help="Amount of downtime allowed for clients")
582
parser.add_option("--interval", type="string", # Parsed later
583
default="5m",
584
help="How often to check that a client is up")
585
parser.add_option("--check", action="store_true", default=False,
904
586
help="Run self-test")
905
parser.add_option("--debug", action="store_true",
906
help="Debug mode; run in foreground and log to"
907
" terminal")
908
parser.add_option("--priority", type="string", help="GnuTLS"
909
" priority string (see GnuTLS documentation)")
910
parser.add_option("--servicename", type="string", metavar="NAME",
911
help="Zeroconf service name")
912
parser.add_option("--configdir", type="string",
913
default="/etc/mandos", metavar="DIR",
914
help="Directory to search for configuration"
915
" files")
916
parser.add_option("--no-dbus", action="store_false",
917
dest="use_dbus",
918
help=optparse.SUPPRESS_HELP) # XXX: Not done yet
919
options = parser.parse_args()[0]
587
parser.add_option("--debug", action="store_true", default=False,
588
help="Debug mode")
589
(options, args) = parser.parse_args()
920
590
921
591
if options.check:
922
592
import doctest
923
593
doctest.testmod()
924
594
sys.exit()
925
595
926
# Default values for config file for server-global settings
927
server_defaults = { "interface": "",
928
"address": "",
929
"port": "",
930
"debug": "False",
931
"priority":
932
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
933
"servicename": "Mandos",
934
"use_dbus": "True",
935
}
936
937
# Parse config file for server-global settings
938
server_config = ConfigParser.SafeConfigParser(server_defaults)
939
del server_defaults
940
server_config.read(os.path.join(options.configdir, "mandos.conf"))
941
# Convert the SafeConfigParser object to a dict
942
server_settings = server_config.defaults()
943
# Use getboolean on the boolean config options
944
server_settings["debug"] = (server_config.getboolean
945
("DEFAULT", "debug"))
946
server_settings["use_dbus"] = (server_config.getboolean
947
("DEFAULT", "use_dbus"))
948
del server_config
949
950
# Override the settings from the config file with command line
951
# options, if set.
952
for option in ("interface", "address", "port", "debug",
953
"priority", "servicename", "configdir",
954
"use_dbus"):
955
value = getattr(options, option)
956
if value is not None:
957
server_settings[option] = value
958
del options
959
# Now we have our good server settings in "server_settings"
960
961
# For convenience
962
debug = server_settings["debug"]
963
use_dbus = server_settings["use_dbus"]
964
use_dbus = False # XXX: Not done yet
965
966
if not debug:
967
syslogger.setLevel(logging.WARNING)
968
console.setLevel(logging.WARNING)
969
970
if server_settings["servicename"] != "Mandos":
971
syslogger.setFormatter(logging.Formatter
972
('Mandos (%s): %%(levelname)s:'
973
' %%(message)s'
974
% server_settings["servicename"]))
975
976
# Parse config file with clients
977
client_defaults = { "timeout": "1h",
978
"interval": "5m",
979
"checker": "fping -q -- %%(host)s",
980
"host": "",
981
}
982
client_config = ConfigParser.SafeConfigParser(client_defaults)
983
client_config.read(os.path.join(server_settings["configdir"],
984
"clients.conf"))
985
986
clients = Set()
987
tcp_server = IPv6_TCPServer((server_settings["address"],
988
server_settings["port"]),
989
TCP_handler,
990
settings=server_settings,
991
clients=clients)
992
pidfilename = "/var/run/mandos.pid"
993
try:
994
pidfile = open(pidfilename, "w")
995
except IOError, error:
996
logger.error("Could not open file %r", pidfilename)
997
998
try:
999
uid = pwd.getpwnam("_mandos").pw_uid
1000
gid = pwd.getpwnam("_mandos").pw_gid
1001
except KeyError:
1002
try:
1003
uid = pwd.getpwnam("mandos").pw_uid
1004
gid = pwd.getpwnam("mandos").pw_gid
1005
except KeyError:
1006
try:
1007
uid = pwd.getpwnam("nobody").pw_uid
1008
gid = pwd.getpwnam("nogroup").pw_gid
1009
except KeyError:
1010
uid = 65534
1011
gid = 65534
1012
try:
1013
os.setuid(uid)
1014
os.setgid(gid)
1015
except OSError, error:
1016
if error[0] != errno.EPERM:
1017
raise error
1018
1019
global service
1020
service = AvahiService(name = server_settings["servicename"],
1021
servicetype = "_mandos._tcp", )
1022
if server_settings["interface"]:
1023
service.interface = (if_nametoindex
1024
(server_settings["interface"]))
1025
1026
global main_loop
1027
global bus
1028
global server
1029
# From the Avahi example code
596
# Parse the time arguments
597
try:
598
options.timeout = string_to_delta(options.timeout)
599
except ValueError:
600
parser.error("option --timeout: Unparseable time")
601
try:
602
options.interval = string_to_delta(options.interval)
603
except ValueError:
604
parser.error("option --interval: Unparseable time")
605
606
# Parse config file
607
defaults = { "checker": "fping -q -- %%(fqdn)s" }
608
client_config = ConfigParser.SafeConfigParser(defaults)
609
#client_config.readfp(open("secrets.conf"), "secrets.conf")
610
client_config.read("mandos-clients.conf")
611
612
# From the Avahi server example code
1030
613
DBusGMainLoop(set_as_default=True )
1031
614
main_loop = gobject.MainLoop()
1032
615
bus = dbus.SystemBus()
1033
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1034
avahi.DBUS_PATH_SERVER),
1035
avahi.DBUS_INTERFACE_SERVER)
616
server = dbus.Interface(
617
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
618
avahi.DBUS_INTERFACE_SERVER )
1036
619
# End of Avahi example code
1037
if use_dbus:
1038
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1039
1040
clients.update(Set(Client(name = section,
1041
config
1042
= dict(client_config.items(section)),
1043
use_dbus = use_dbus)
620
621
debug = options.debug
622
623
if debug:
624
console = logging.StreamHandler()
625
# console.setLevel(logging.DEBUG)
626
console.setFormatter(logging.Formatter\
627
('%(levelname)s: %(message)s'))
628
logger.addHandler(console)
629
del console
630
631
clients = Set()
632
def remove_from_clients(client):
633
clients.remove(client)
634
if not clients:
635
logger.debug(u"No clients left, exiting")
636
killme()
637
638
clients.update(Set(Client(name=section, options=options,
639
stop_hook = remove_from_clients,
640
**(dict(client_config\
641
.items(section))))
1044
642
for section in client_config.sections()))
1045
if not clients:
1046
logger.warning(u"No clients defined")
1047
1048
if debug:
1049
# Redirect stdin so all checkers get /dev/null
1050
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1051
os.dup2(null, sys.stdin.fileno())
1052
if null > 2:
1053
os.close(null)
1054
else:
1055
# No console logging
1056
logger.removeHandler(console)
1057
# Close all input and output, do double fork, etc.
1058
daemon()
1059
1060
try:
1061
pid = os.getpid()
1062
pidfile.write(str(pid) + "\n")
1063
pidfile.close()
1064
del pidfile
1065
except IOError:
1066
logger.error(u"Could not write to file %r with PID %d",
1067
pidfilename, pid)
1068
except NameError:
1069
# "pidfile" was never created
1070
pass
1071
del pidfilename
643
644
if not debug:
645
daemon(False, False)
1072
646
1073
647
def cleanup():
1074
648
"Cleanup function; run on exit"
1075
649
global group
1076
# From the Avahi example code
650
# From the Avahi server example code
1077
651
if not group is None:
1078
652
group.Free()
1079
653
group = None
1080
654
# End of Avahi example code
1081
655
1082
while clients:
1083
client = clients.pop()
1084
client.disable_hook = None
1085
client.disable()
656
for client in clients:
657
client.stop_hook = None
658
client.stop()
1086
659
1087
660
atexit.register(cleanup)
1088
661
1089
662
if not debug:
1090
663
signal.signal(signal.SIGINT, signal.SIG_IGN)
1091
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1092
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1093
1094
if use_dbus:
1095
class MandosServer(dbus.service.Object):
1096
"""A D-Bus proxy object"""
1097
def __init__(self):
1098
dbus.service.Object.__init__(self, bus, "/")
1099
_interface = u"se.bsnet.fukt.Mandos"
1100
1101
@dbus.service.signal(_interface, signature="oa{sv}")
1102
def ClientAdded(self, objpath, properties):
1103
"D-Bus signal"
1104
pass
1105
1106
@dbus.service.signal(_interface, signature="os")
1107
def ClientRemoved(self, objpath, name):
1108
"D-Bus signal"
1109
pass
1110
1111
@dbus.service.method(_interface, out_signature="ao")
1112
def GetAllClients(self):
1113
return dbus.Array(c.dbus_object_path for c in clients)
1114
1115
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1116
def GetAllClientsWithProperties(self):
1117
return dbus.Dictionary(
1118
((c.dbus_object_path, c.GetAllProperties())
1119
for c in clients),
1120
signature="oa{sv}")
1121
1122
@dbus.service.method(_interface, in_signature="o")
1123
def RemoveClient(self, object_path):
1124
for c in clients:
1125
if c.dbus_object_path == object_path:
1126
clients.remove(c)
1127
# Don't signal anything except ClientRemoved
1128
c.use_dbus = False
1129
c.disable()
1130
# Emit D-Bus signal
1131
self.ClientRemoved(object_path, c.name)
1132
return
1133
raise KeyError
1134
1135
del _interface
1136
1137
mandos_server = MandosServer()
664
signal.signal(signal.SIGHUP, lambda signum, frame: killme())
665
signal.signal(signal.SIGTERM, lambda signum, frame: killme())
1138
666
1139
667
for client in clients:
1140
if use_dbus:
1141
# Emit D-Bus signal
1142
mandos_server.ClientAdded(client.dbus_object_path,
1143
client.GetAllProperties())
1144
client.enable()
1145
1146
tcp_server.enable()
1147
tcp_server.server_activate()
1148
1149
# Find out what port we got
1150
service.port = tcp_server.socket.getsockname()[1]
1151
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1152
u" scope_id %d" % tcp_server.socket.getsockname())
1153
1154
#service.interface = tcp_server.socket.getsockname()[3]
1155
1156
try:
1157
# From the Avahi example code
1158
server.connect_to_signal("StateChanged", server_state_changed)
1159
try:
1160
server_state_changed(server.GetState())
1161
except dbus.exceptions.DBusException, error:
1162
logger.critical(u"DBusException: %s", error)
1163
sys.exit(1)
1164
# End of Avahi example code
1165
1166
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1167
lambda *args, **kwargs:
1168
(tcp_server.handle_request
1169
(*args[2:], **kwargs) or True))
1170
1171
logger.debug(u"Starting main loop")
668
client.start()
669
670
tcp_server = IPv6_TCPServer((None, options.port),
671
tcp_handler,
672
options=options,
673
clients=clients)
674
# Find out what random port we got
675
servicePort = tcp_server.socket.getsockname()[1]
676
logger.debug(u"Now listening on port %d", servicePort)
677
678
if options.interface is not None:
679
serviceInterface = if_nametoindex(options.interface)
680
681
# From the Avahi server example code
682
server.connect_to_signal("StateChanged", server_state_changed)
683
try:
684
server_state_changed(server.GetState())
685
except dbus.exceptions.DBusException, error:
686
logger.critical(u"DBusException: %s", error)
687
killme(1)
688
# End of Avahi example code
689
690
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
691
lambda *args, **kwargs:
692
tcp_server.handle_request(*args[2:],
693
**kwargs) or True)
694
try:
695
main_loop_started = True
1172
696
main_loop.run()
1173
except AvahiError, error:
1174
logger.critical(u"AvahiError: %s", error)
1175
sys.exit(1)
1176
697
except KeyboardInterrupt:
1177
698
if debug:
1178
699
print
1179
1180
if __name__ == '__main__':
1181
main()
700
701
sys.exit(exitstatus)
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0