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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:
- COPYING
- files renamed:
- clients.conf => mandos-clients.conf
- plugin-runner.c => plugbasedclient.c
- plugins.d/password-request.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
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
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# 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
#
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# Everything else is
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# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
18
# the Free Software Foundation, either version 3 of the License, or
19
# (at your option) any later version.
20
#
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# This program is distributed in the hope that it will be useful,
22
# but WITHOUT ANY WARRANTY; without even the implied warranty of
23
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24
# GNU General Public License for more details.
25
#
26
# You should have received a copy of the GNU General Public License
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
28
#
29
# Contact the authors at <mandos@fukt.bsnet.se>.
30
#
31
3
32
4
from __future__ import division
33
5
52
24
import subprocess
53
25
import atexit
54
26
import stat
55
import logging
56
import logging.handlers
57
27
58
28
import dbus
59
29
import gobject
61
31
from dbus.mainloop.glib import DBusGMainLoop
62
32
import ctypes
63
33
64
version = "1.0"
34
import logging
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import logging.handlers
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36
66
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logger = logging.Logger('mandos')
67
38
syslogger = logging.handlers.SysLogHandler\
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log")
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
70
40
syslogger.setFormatter(logging.Formatter\
71
('Mandos: %(levelname)s: %(message)s'))
41
('%(levelname)s: %(message)s'))
72
42
logger.addHandler(syslogger)
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74
console = logging.StreamHandler()
75
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
76
' %(message)s'))
77
logger.addHandler(console)
78
79
class AvahiError(Exception):
80
def __init__(self, value):
81
self.value = value
82
def __str__(self):
83
return repr(self.value)
84
85
class AvahiServiceError(AvahiError):
86
pass
87
88
class AvahiGroupError(AvahiError):
89
pass
90
91
92
class AvahiService(object):
93
"""An Avahi (Zeroconf) service.
94
Attributes:
95
interface: integer; avahi.IF_UNSPEC or an interface index.
96
Used to optionally bind to the specified interface.
97
name: string; Example: 'Mandos'
98
type: string; Example: '_mandos._tcp'.
99
See <http://www.dns-sd.org/ServiceTypes.html>
100
port: integer; what port to announce
101
TXT: list of strings; TXT record for the service
102
domain: string; Domain to publish on, default to .local if empty.
103
host: string; Host to publish records for, default is localhost
104
max_renames: integer; maximum number of renames
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rename_count: integer; counter so we only rename after collisions
106
a sensible number of times
107
"""
108
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
109
type = None, port = None, TXT = None, domain = "",
110
host = "", max_renames = 32768):
111
self.interface = interface
112
self.name = name
113
self.type = type
114
self.port = port
115
if TXT is None:
116
self.TXT = []
117
else:
118
self.TXT = TXT
119
self.domain = domain
120
self.host = host
121
self.rename_count = 0
122
self.max_renames = max_renames
123
def rename(self):
124
"""Derived from the Avahi example code"""
125
if self.rename_count >= self.max_renames:
126
logger.critical(u"No suitable service name found after %i"
127
u" retries, exiting.", rename_count)
128
raise AvahiServiceError("Too many renames")
129
self.name = server.GetAlternativeServiceName(self.name)
130
logger.info(u"Changing name to %r ...", str(self.name))
131
syslogger.setFormatter(logging.Formatter\
132
('Mandos (%s): %%(levelname)s:'
133
' %%(message)s' % self.name))
134
self.remove()
135
self.add()
136
self.rename_count += 1
137
def remove(self):
138
"""Derived from the Avahi example code"""
139
if group is not None:
140
group.Reset()
141
def add(self):
142
"""Derived from the Avahi example code"""
143
global group
144
if group is None:
145
group = dbus.Interface\
146
(bus.get_object(avahi.DBUS_NAME,
147
server.EntryGroupNew()),
148
avahi.DBUS_INTERFACE_ENTRY_GROUP)
149
group.connect_to_signal('StateChanged',
150
entry_group_state_changed)
151
logger.debug(u"Adding service '%s' of type '%s' ...",
152
service.name, service.type)
153
group.AddService(
154
self.interface, # interface
155
avahi.PROTO_INET6, # protocol
156
dbus.UInt32(0), # flags
157
self.name, self.type,
158
self.domain, self.host,
159
dbus.UInt16(self.port),
160
avahi.string_array_to_txt_array(self.TXT))
161
group.Commit()
162
163
# From the Avahi example code:
164
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
165
59
# End of Avahi example code
166
60
167
61
172
66
fingerprint: string (40 or 32 hexadecimal digits); used to
173
67
uniquely identify the client
174
68
secret: bytestring; sent verbatim (over TLS) to client
175
host: string; available for use by the checker command
176
created: datetime.datetime(); object creation, not client host
177
last_checked_ok: datetime.datetime() or None if not yet checked OK
178
timeout: datetime.timedelta(); How long from last_checked_ok
179
until this client is invalid
69
fqdn: string (FQDN); available for use by the checker command
70
created: datetime.datetime()
71
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
180
74
interval: datetime.timedelta(); How often to start a new checker
181
75
stop_hook: If set, called by stop() as stop_hook(self)
182
76
checker: subprocess.Popen(); a running checker process used
183
77
to see if the client lives.
184
'None' if no process is running.
78
Is None if no process is running.
185
79
checker_initiator_tag: a gobject event source tag, or None
186
80
stop_initiator_tag: - '' -
187
81
checker_callback_tag: - '' -
188
82
checker_command: string; External command which is run to check if
189
client lives. %() expansions are done at
83
client lives. %()s expansions are done at
190
84
runtime with vars(self) as dict, so that for
191
85
instance %(name)s can be used in the command.
192
86
Private attibutes:
193
87
_timeout: Real variable for 'timeout'
194
88
_interval: Real variable for 'interval'
195
_timeout_milliseconds: Used when calling gobject.timeout_add()
89
_timeout_milliseconds: Used by gobject.timeout_add()
196
90
_interval_milliseconds: - '' -
197
91
"""
198
92
def _set_timeout(self, timeout):
218
112
interval = property(lambda self: self._interval,
219
113
_set_interval)
220
114
del _set_interval
221
def __init__(self, name = None, stop_hook=None, config={}):
222
"""Note: the 'checker' key in 'config' sets the
223
'checker_command' attribute and *not* the 'checker'
224
attribute."""
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
logger.debug(u"Creating client %r", self.name)
227
# Uppercase and remove spaces from fingerprint for later
228
# comparison purposes with return value from the fingerprint()
229
# function
230
self.fingerprint = config["fingerprint"].upper()\
231
.replace(u" ", u"")
232
logger.debug(u" Fingerprint: %s", self.fingerprint)
233
if "secret" in config:
234
self.secret = config["secret"].decode(u"base64")
235
elif "secfile" in config:
236
sf = open(config["secfile"])
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)
237
127
self.secret = sf.read()
238
128
sf.close()
239
129
else:
240
raise TypeError(u"No secret or secfile for client %s"
241
% self.name)
242
self.host = config.get("host", "")
130
raise RuntimeError(u"No secret or secfile for client %s"
131
% self.name)
132
self.fqdn = fqdn # string
243
133
self.created = datetime.datetime.now()
244
self.last_checked_ok = None
245
self.timeout = string_to_delta(config["timeout"])
246
self.interval = string_to_delta(config["interval"])
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)
247
143
self.stop_hook = stop_hook
248
144
self.checker = None
249
145
self.checker_initiator_tag = None
250
146
self.stop_initiator_tag = None
251
147
self.checker_callback_tag = None
252
self.check_command = config["checker"]
148
self.check_command = checker
253
149
def start(self):
254
"""Start this client's checker and timeout hooks"""
150
"""Start this clients checker and timeout hooks"""
255
151
# Schedule a new checker to be started an 'interval' from now,
256
152
# and every interval from then on.
257
153
self.checker_initiator_tag = gobject.timeout_add\
265
161
self.stop)
266
162
def stop(self):
267
163
"""Stop this client.
268
The possibility that a client might be restarted is left open,
269
but not currently used."""
270
# If this client doesn't have a secret, it is already stopped.
271
if hasattr(self, "secret") and self.secret:
272
logger.info(u"Stopping client %s", self.name)
273
self.secret = None
274
else:
275
return False
276
if getattr(self, "stop_initiator_tag", False):
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:
277
169
gobject.source_remove(self.stop_initiator_tag)
278
170
self.stop_initiator_tag = None
279
if getattr(self, "checker_initiator_tag", False):
171
if self.checker_initiator_tag:
280
172
gobject.source_remove(self.checker_initiator_tag)
281
173
self.checker_initiator_tag = None
282
174
self.stop_checker()
285
177
# Do not run this again if called by a gobject.timeout_add
286
178
return False
287
179
def __del__(self):
288
self.stop_hook = None
289
self.stop()
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()
290
190
def checker_callback(self, pid, condition):
291
191
"""The checker has completed, so take appropriate actions."""
292
192
now = datetime.datetime.now()
293
self.checker_callback_tag = None
294
self.checker = None
295
193
if os.WIFEXITED(condition) \
296
194
and (os.WEXITSTATUS(condition) == 0):
297
logger.info(u"Checker for %(name)s succeeded",
298
vars(self))
299
self.last_checked_ok = now
195
logger.debug(u"Checker for %(name)s succeeded",
196
vars(self))
197
self.last_seen = now
300
198
gobject.source_remove(self.stop_initiator_tag)
301
199
self.stop_initiator_tag = gobject.timeout_add\
302
200
(self._timeout_milliseconds,
305
203
logger.warning(u"Checker for %(name)s crashed?",
306
204
vars(self))
307
205
else:
308
logger.info(u"Checker for %(name)s failed",
309
vars(self))
206
logger.debug(u"Checker for %(name)s failed",
207
vars(self))
208
self.checker = None
209
self.checker_callback_tag = None
310
210
def start_checker(self):
311
211
"""Start a new checker subprocess if one is not running.
312
212
If a checker already exists, leave it running and do
313
213
nothing."""
314
# The reason for not killing a running checker is that if we
315
# did that, then if a checker (for some reason) started
316
# running slowly and taking more than 'interval' time, the
317
# client would inevitably timeout, since no checker would get
318
# a chance to run to completion. If we instead leave running
319
# checkers alone, the checker would have to take more time
320
# than 'timeout' for the client to be declared invalid, which
321
# is as it should be.
322
214
if self.checker is None:
323
215
try:
324
# In case check_command has exactly one % operator
325
command = self.check_command % self.host
216
command = self.check_command % self.fqdn
326
217
except TypeError:
327
# Escape attributes for the shell
328
218
escaped_attrs = dict((key, re.escape(str(val)))
329
219
for key, val in
330
220
vars(self).iteritems())
331
221
try:
332
222
command = self.check_command % escaped_attrs
333
223
except TypeError, error:
334
logger.error(u'Could not format string "%s":'
335
u' %s', self.check_command, error)
224
logger.critical(u'Could not format string "%s":'
225
u' %s', self.check_command, error)
336
226
return True # Try again later
337
227
try:
338
logger.info(u"Starting checker %r for %s",
339
command, self.name)
340
# We don't need to redirect stdout and stderr, since
341
# in normal mode, that is already done by daemon(),
342
# and in debug mode we don't want to. (Stdin is
343
# always replaced by /dev/null.)
344
self.checker = subprocess.Popen(command,
345
close_fds=True,
346
shell=True, cwd="/")
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="/")
347
234
self.checker_callback_tag = gobject.child_watch_add\
348
235
(self.checker.pid,
349
236
self.checker_callback)
350
except OSError, error:
237
except subprocess.OSError, error:
351
238
logger.error(u"Failed to start subprocess: %s",
352
239
error)
353
240
# Re-run this periodically if run by gobject.timeout_add
354
241
return True
355
242
def stop_checker(self):
356
243
"""Force the checker process, if any, to stop."""
357
if self.checker_callback_tag:
358
gobject.source_remove(self.checker_callback_tag)
359
self.checker_callback_tag = None
360
if getattr(self, "checker", None) is None:
244
if not hasattr(self, "checker") or self.checker is None:
361
245
return
362
logger.debug(u"Stopping checker for %(name)s", vars(self))
363
try:
364
os.kill(self.checker.pid, signal.SIGTERM)
365
#os.sleep(0.5)
366
#if self.checker.poll() is None:
367
# os.kill(self.checker.pid, signal.SIGKILL)
368
except OSError, error:
369
if error.errno != errno.ESRCH: # No such process
370
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)
371
251
self.checker = None
372
def still_valid(self):
252
def still_valid(self, now=None):
373
253
"""Has the timeout not yet passed for this client?"""
374
now = datetime.datetime.now()
375
if self.last_checked_ok is None:
254
if now is None:
255
now = datetime.datetime.now()
256
if self.last_seen is None:
376
257
return now < (self.created + self.timeout)
377
258
else:
378
return now < (self.last_checked_ok + self.timeout)
259
return now < (self.last_seen + self.timeout)
379
260
380
261
381
262
def peer_certificate(session):
382
"Return the peer's OpenPGP certificate as a bytestring"
263
"Return an OpenPGP data packet string for the peer's certificate"
383
264
# If not an OpenPGP certificate...
384
265
if gnutls.library.functions.gnutls_certificate_type_get\
385
266
(session._c_object) \
396
277
397
278
398
279
def fingerprint(openpgp):
399
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
280
"Convert an OpenPGP data string to a hexdigit fingerprint string"
281
# New empty GnuTLS certificate
282
crt = gnutls.library.types.gnutls_openpgp_crt_t()
283
gnutls.library.functions.gnutls_openpgp_crt_init\
284
(ctypes.byref(crt))
400
285
# New GnuTLS "datum" with the OpenPGP public key
401
286
datum = gnutls.library.types.gnutls_datum_t\
402
287
(ctypes.cast(ctypes.c_char_p(openpgp),
403
288
ctypes.POINTER(ctypes.c_ubyte)),
404
289
ctypes.c_uint(len(openpgp)))
405
# New empty GnuTLS certificate
406
crt = gnutls.library.types.gnutls_openpgp_crt_t()
407
gnutls.library.functions.gnutls_openpgp_crt_init\
408
(ctypes.byref(crt))
409
290
# Import the OpenPGP public key into the certificate
410
gnutls.library.functions.gnutls_openpgp_crt_import\
411
(crt, ctypes.byref(datum),
412
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
413
# Verify the self signature in the key
414
crtverify = ctypes.c_uint();
415
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
416
(crt, ctypes.c_uint(0), ctypes.byref(crtverify))
417
if crtverify.value != 0:
418
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
419
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)
420
295
# New buffer for the fingerprint
421
296
buffer = ctypes.create_string_buffer(20)
422
297
buffer_length = ctypes.c_size_t()
438
313
Note: This will run in its own forked process."""
439
314
440
315
def handle(self):
441
logger.info(u"TCP connection from: %s",
316
logger.debug(u"TCP connection from: %s",
442
317
unicode(self.client_address))
443
session = gnutls.connection.ClientSession\
444
(self.request, gnutls.connection.X509Credentials())
445
446
line = self.request.makefile().readline()
447
logger.debug(u"Protocol version: %r", line)
448
try:
449
if int(line.strip().split()[0]) > 1:
450
raise RuntimeError
451
except (ValueError, IndexError, RuntimeError), error:
452
logger.error(u"Unknown protocol version: %s", error)
453
return
454
455
# Note: gnutls.connection.X509Credentials is really a generic
456
# GnuTLS certificate credentials object so long as no X.509
457
# keys are added to it. Therefore, we can use it here despite
458
# using OpenPGP certificates.
318
session = gnutls.connection.ClientSession(self.request,
319
gnutls.connection.\
320
X509Credentials())
459
321
460
322
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
461
323
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
462
324
# "+DHE-DSS"))
463
priority = "NORMAL" # Fallback default, since this
464
# MUST be set.
465
if self.server.settings["priority"]:
466
priority = self.server.settings["priority"]
325
priority = "SECURE256"
326
467
327
gnutls.library.functions.gnutls_priority_set_direct\
468
328
(session._c_object, priority, None);
469
329
470
330
try:
471
331
session.handshake()
472
332
except gnutls.errors.GNUTLSError, error:
473
logger.warning(u"Handshake failed: %s", error)
333
logger.debug(u"Handshake failed: %s", error)
474
334
# Do not run session.bye() here: the session is not
475
335
# established. Just abandon the request.
476
336
return
477
337
try:
478
338
fpr = fingerprint(peer_certificate(session))
479
339
except (TypeError, gnutls.errors.GNUTLSError), error:
480
logger.warning(u"Bad certificate: %s", error)
340
logger.debug(u"Bad certificate: %s", error)
481
341
session.bye()
482
342
return
483
343
logger.debug(u"Fingerprint: %s", fpr)
484
344
client = None
485
for c in self.server.clients:
345
for c in clients:
486
346
if c.fingerprint == fpr:
487
347
client = c
488
348
break
489
if not client:
490
logger.warning(u"Client not found for fingerprint: %s",
491
fpr)
492
session.bye()
493
return
494
349
# Have to check if client.still_valid(), since it is possible
495
350
# that the client timed out while establishing the GnuTLS
496
351
# session.
497
if not client.still_valid():
498
logger.warning(u"Client %(name)s is invalid",
499
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)
500
359
session.bye()
501
360
return
502
361
sent_size = 0
512
371
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
513
372
"""IPv6 TCP server. Accepts 'None' as address and/or port.
514
373
Attributes:
515
settings: Server settings
374
options: Command line options
516
375
clients: Set() of Client objects
517
376
"""
518
377
address_family = socket.AF_INET6
519
378
def __init__(self, *args, **kwargs):
520
if "settings" in kwargs:
521
self.settings = kwargs["settings"]
522
del kwargs["settings"]
379
if "options" in kwargs:
380
self.options = kwargs["options"]
381
del kwargs["options"]
523
382
if "clients" in kwargs:
524
383
self.clients = kwargs["clients"]
525
384
del kwargs["clients"]
528
387
"""This overrides the normal server_bind() function
529
388
to bind to an interface if one was specified, and also NOT to
530
389
bind to an address or port if they were not specified."""
531
if self.settings["interface"]:
532
# 25 is from /usr/include/asm-i486/socket.h
533
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
534
394
try:
535
395
self.socket.setsockopt(socket.SOL_SOCKET,
536
SO_BINDTODEVICE,
537
self.settings["interface"])
396
socket.SO_BINDTODEVICE,
397
self.options.interface)
538
398
except socket.error, error:
539
399
if error[0] == errno.EPERM:
540
logger.error(u"No permission to"
541
u" bind to interface %s",
542
self.settings["interface"])
400
logger.warning(u"No permission to"
401
u" bind to interface %s",
402
self.options.interface)
543
403
else:
544
404
raise error
545
405
# Only bind(2) the socket if we really need to.
548
408
in6addr_any = "::"
549
409
self.server_address = (in6addr_any,
550
410
self.server_address[1])
551
elif not self.server_address[1]:
411
elif self.server_address[1] is None:
552
412
self.server_address = (self.server_address[0],
553
413
0)
554
# if self.settings["interface"]:
555
# self.server_address = (self.server_address[0],
556
# 0, # port
557
# 0, # flowinfo
558
# if_nametoindex
559
# (self.settings
560
# ["interface"]))
561
414
return super(type(self), self).server_bind()
562
415
563
416
574
427
datetime.timedelta(1)
575
428
>>> string_to_delta(u'1w')
576
429
datetime.timedelta(7)
577
>>> string_to_delta('5m 30s')
578
datetime.timedelta(0, 330)
579
430
"""
580
timevalue = datetime.timedelta(0)
581
for s in interval.split():
582
try:
583
suffix=unicode(s[-1])
584
value=int(s[:-1])
585
if suffix == u"d":
586
delta = datetime.timedelta(value)
587
elif suffix == u"s":
588
delta = datetime.timedelta(0, value)
589
elif suffix == u"m":
590
delta = datetime.timedelta(0, 0, 0, 0, value)
591
elif suffix == u"h":
592
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
593
elif suffix == u"w":
594
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
595
else:
596
raise ValueError
597
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:
598
445
raise ValueError
599
timevalue += delta
600
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()
601
482
602
483
603
484
def server_state_changed(state):
604
"""Derived from the Avahi example code"""
485
"""From the Avahi server example code"""
605
486
if state == avahi.SERVER_COLLISION:
606
logger.error(u"Server name collision")
607
service.remove()
487
logger.warning(u"Server name collision")
488
remove_service()
608
489
elif state == avahi.SERVER_RUNNING:
609
service.add()
490
add_service()
610
491
611
492
612
493
def entry_group_state_changed(state, error):
613
"""Derived from the Avahi example code"""
494
"""From the Avahi server example code"""
495
global serviceName, server, rename_count
496
614
497
logger.debug(u"state change: %i", state)
615
498
616
499
if state == avahi.ENTRY_GROUP_ESTABLISHED:
617
500
logger.debug(u"Service established.")
618
501
elif state == avahi.ENTRY_GROUP_COLLISION:
619
logger.warning(u"Service name collision.")
620
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)
621
515
elif state == avahi.ENTRY_GROUP_FAILURE:
622
logger.critical(u"Error in group state changed %s",
623
unicode(error))
624
raise AvahiGroupError("State changed: %s", str(error))
516
logger.error(u"Error in group state changed %s",
517
unicode(error))
518
killme(1)
519
625
520
626
521
def if_nametoindex(interface):
627
"""Call the C function if_nametoindex(), or equivalent"""
628
global if_nametoindex
522
"""Call the C function if_nametoindex()"""
629
523
try:
630
if "ctypes.util" not in sys.modules:
631
import ctypes.util
632
if_nametoindex = ctypes.cdll.LoadLibrary\
633
(ctypes.util.find_library("c")).if_nametoindex
524
libc = ctypes.cdll.LoadLibrary("libc.so.6")
525
return libc.if_nametoindex(interface)
634
526
except (OSError, AttributeError):
635
527
if "struct" not in sys.modules:
636
528
import struct
637
529
if "fcntl" not in sys.modules:
638
530
import fcntl
639
def if_nametoindex(interface):
640
"Get an interface index the hard way, i.e. using fcntl()"
641
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
642
s = socket.socket()
643
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
644
struct.pack("16s16x", interface))
645
s.close()
646
interface_index = struct.unpack("I", ifreq[16:20])[0]
647
return interface_index
648
return if_nametoindex(interface)
649
650
651
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):
652
541
"""See daemon(3). Standard BSD Unix function.
653
542
This should really exist as os.daemon, but it doesn't (yet)."""
654
543
if os.fork():
656
545
os.setsid()
657
546
if not nochdir:
658
547
os.chdir("/")
659
if os.fork():
660
sys.exit()
661
548
if not noclose:
662
549
# Close all standard open file descriptors
663
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
550
null = os.open("/dev/null", os.O_NOCTTY | os.O_RDWR)
664
551
if not stat.S_ISCHR(os.fstat(null).st_mode):
665
552
raise OSError(errno.ENODEV,
666
553
"/dev/null not a character device")
671
558
os.close(null)
672
559
673
560
674
def main():
675
global main_loop_started
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
676
572
main_loop_started = False
677
678
parser = OptionParser(version = "%%prog %s" % version)
573
parser = OptionParser()
679
574
parser.add_option("-i", "--interface", type="string",
680
metavar="IF", help="Bind to interface IF")
681
parser.add_option("-a", "--address", type="string",
682
help="Address to listen for requests on")
683
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,
684
578
help="Port number to receive requests on")
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")
685
585
parser.add_option("--check", action="store_true", default=False,
686
586
help="Run self-test")
687
parser.add_option("--debug", action="store_true",
688
help="Debug mode; run in foreground and log to"
689
" terminal")
690
parser.add_option("--priority", type="string", help="GnuTLS"
691
" priority string (see GnuTLS documentation)")
692
parser.add_option("--servicename", type="string", metavar="NAME",
693
help="Zeroconf service name")
694
parser.add_option("--configdir", type="string",
695
default="/etc/mandos", metavar="DIR",
696
help="Directory to search for configuration"
697
" files")
587
parser.add_option("--debug", action="store_true", default=False,
588
help="Debug mode")
698
589
(options, args) = parser.parse_args()
699
590
700
591
if options.check:
702
593
doctest.testmod()
703
594
sys.exit()
704
595
705
# Default values for config file for server-global settings
706
server_defaults = { "interface": "",
707
"address": "",
708
"port": "",
709
"debug": "False",
710
"priority":
711
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
712
"servicename": "Mandos",
713
}
714
715
# Parse config file for server-global settings
716
server_config = ConfigParser.SafeConfigParser(server_defaults)
717
del server_defaults
718
server_config.read(os.path.join(options.configdir, "mandos.conf"))
719
# Convert the SafeConfigParser object to a dict
720
server_settings = server_config.defaults()
721
# Use getboolean on the boolean config option
722
server_settings["debug"] = server_config.getboolean\
723
("DEFAULT", "debug")
724
del server_config
725
726
# Override the settings from the config file with command line
727
# options, if set.
728
for option in ("interface", "address", "port", "debug",
729
"priority", "servicename", "configdir"):
730
value = getattr(options, option)
731
if value is not None:
732
server_settings[option] = value
733
del options
734
# Now we have our good server settings in "server_settings"
735
736
debug = server_settings["debug"]
737
738
if not debug:
739
syslogger.setLevel(logging.WARNING)
740
console.setLevel(logging.WARNING)
741
742
if server_settings["servicename"] != "Mandos":
743
syslogger.setFormatter(logging.Formatter\
744
('Mandos (%s): %%(levelname)s:'
745
' %%(message)s'
746
% server_settings["servicename"]))
747
748
# Parse config file with clients
749
client_defaults = { "timeout": "1h",
750
"interval": "5m",
751
"checker": "fping -q -- %(host)s",
752
"host": "",
753
}
754
client_config = ConfigParser.SafeConfigParser(client_defaults)
755
client_config.read(os.path.join(server_settings["configdir"],
756
"clients.conf"))
757
758
global service
759
service = AvahiService(name = server_settings["servicename"],
760
type = "_mandos._tcp", );
761
if server_settings["interface"]:
762
service.interface = if_nametoindex(server_settings["interface"])
763
764
global main_loop
765
global bus
766
global server
767
# 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
768
613
DBusGMainLoop(set_as_default=True )
769
614
main_loop = gobject.MainLoop()
770
615
bus = dbus.SystemBus()
773
618
avahi.DBUS_INTERFACE_SERVER )
774
619
# End of Avahi example code
775
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
776
631
clients = Set()
777
632
def remove_from_clients(client):
778
633
clients.remove(client)
779
634
if not clients:
780
logger.critical(u"No clients left, exiting")
781
sys.exit()
635
logger.debug(u"No clients left, exiting")
636
killme()
782
637
783
clients.update(Set(Client(name = section,
638
clients.update(Set(Client(name=section, options=options,
784
639
stop_hook = remove_from_clients,
785
config
786
= dict(client_config.items(section)))
640
**(dict(client_config\
641
.items(section))))
787
642
for section in client_config.sections()))
788
if not clients:
789
logger.critical(u"No clients defined")
790
sys.exit(1)
791
792
if debug:
793
# Redirect stdin so all checkers get /dev/null
794
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
795
os.dup2(null, sys.stdin.fileno())
796
if null > 2:
797
os.close(null)
798
else:
799
# No console logging
800
logger.removeHandler(console)
801
# Close all input and output, do double fork, etc.
802
daemon()
803
804
pidfilename = "/var/run/mandos/mandos.pid"
805
pid = os.getpid()
806
try:
807
pidfile = open(pidfilename, "w")
808
pidfile.write(str(pid) + "\n")
809
pidfile.close()
810
del pidfile
811
except IOError, err:
812
logger.error(u"Could not write %s file with PID %d",
813
pidfilename, os.getpid())
643
644
if not debug:
645
daemon(False, False)
814
646
815
647
def cleanup():
816
648
"Cleanup function; run on exit"
817
649
global group
818
# From the Avahi example code
650
# From the Avahi server example code
819
651
if not group is None:
820
652
group.Free()
821
653
group = None
822
654
# End of Avahi example code
823
655
824
while clients:
825
client = clients.pop()
656
for client in clients:
826
657
client.stop_hook = None
827
658
client.stop()
828
659
830
661
831
662
if not debug:
832
663
signal.signal(signal.SIGINT, signal.SIG_IGN)
833
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
834
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
664
signal.signal(signal.SIGHUP, lambda signum, frame: killme())
665
signal.signal(signal.SIGTERM, lambda signum, frame: killme())
835
666
836
667
for client in clients:
837
668
client.start()
838
669
839
tcp_server = IPv6_TCPServer((server_settings["address"],
840
server_settings["port"]),
670
tcp_server = IPv6_TCPServer((None, options.port),
841
671
tcp_handler,
842
settings=server_settings,
672
options=options,
843
673
clients=clients)
844
# Find out what port we got
845
service.port = tcp_server.socket.getsockname()[1]
846
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
847
u" scope_id %d" % tcp_server.socket.getsockname())
848
849
#service.interface = tcp_server.socket.getsockname()[3]
850
851
try:
852
# From the Avahi example code
853
server.connect_to_signal("StateChanged", server_state_changed)
854
try:
855
server_state_changed(server.GetState())
856
except dbus.exceptions.DBusException, error:
857
logger.critical(u"DBusException: %s", error)
858
sys.exit(1)
859
# End of Avahi example code
860
861
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
862
lambda *args, **kwargs:
863
tcp_server.handle_request\
864
(*args[2:], **kwargs) or True)
865
866
logger.debug(u"Starting main loop")
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:
867
695
main_loop_started = True
868
696
main_loop.run()
869
except AvahiError, error:
870
logger.critical(u"AvahiError: %s" + unicode(error))
871
sys.exit(1)
872
697
except KeyboardInterrupt:
873
698
if debug:
874
699
print
875
876
if __name__ == '__main__':
877
main()
700
701
sys.exit(exitstatus)
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0