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- Committer: Teddy Hogeborn
- Date: 2008-08-25 01:16:38 UTC
- Revision ID: teddy@fukt.bsnet.se-20080825011638-zgqej2cafhne05ay
* mandos-keygen: Strip 24-bit checksum of Radix-64 from output to make
output strictly base64.
output strictly base64.
- files added:
- COPYING
- files removed:
- ca.pem
- files renamed:
- mandos-clients.conf => clients.conf
- server.py => mandos
- plugbasedclient.c => plugin-runner.c
- plugins.d/passprompt.c => plugins.d/password-prompt.c
- plugins.d/mandosclient.c => plugins.d/password-request.c
- files modified:
- Makefile
added
removed
mandos
1
1
#!/usr/bin/python
2
# -*- mode: python; coding: utf-8 -*-
3
#
4
# Mandos server - give out binary blobs to connecting clients.
5
#
6
# This program is partly derived from an example program for an Avahi
7
# service publisher, downloaded from
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
#
13
# Everything else is
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
15
#
16
# This program is free software: you can redistribute it and/or modify
17
# 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
#
21
# 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
#
2
31
3
32
from __future__ import division
4
33
21
50
import signal
22
51
from sets import Set
23
52
import subprocess
53
import atexit
54
import stat
55
import logging
56
import logging.handlers
24
57
25
58
import dbus
26
59
import gobject
28
61
from dbus.mainloop.glib import DBusGMainLoop
29
62
import ctypes
30
63
31
import logging
32
import logging.handlers
33
34
# logghandler.setFormatter(logging.Formatter('%(levelname)s %(message)s')
64
version = "1.0"
35
65
36
66
logger = logging.Logger('mandos')
37
logger.addHandler(logging.handlers.SysLogHandler(facility = logging.handlers.SysLogHandler.LOG_DAEMON))
38
39
# This variable is used to optionally bind to a specified interface.
40
# It is a global variable to fit in with the other variables from the
41
# Avahi server example code.
42
serviceInterface = avahi.IF_UNSPEC
43
# From the Avahi server example code:
44
serviceName = "Mandos"
45
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
46
servicePort = None # Not known at startup
47
serviceTXT = [] # TXT record for the service
48
domain = "" # Domain to publish on, default to .local
49
host = "" # Host to publish records for, default to localhost
50
group = None #our entry group
51
rename_count = 12 # Counter so we only rename after collisions a
52
# sensible number of times
67
syslogger = logging.handlers.SysLogHandler\
68
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
69
address = "/dev/log")
70
syslogger.setFormatter(logging.Formatter\
71
('Mandos: %(levelname)s: %(message)s'))
72
logger.addHandler(syslogger)
73
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
105
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
53
165
# End of Avahi example code
54
166
55
167
60
172
fingerprint: string (40 or 32 hexadecimal digits); used to
61
173
uniquely identify the client
62
174
secret: bytestring; sent verbatim (over TLS) to client
63
fqdn: string (FQDN); available for use by the checker command
64
created: datetime.datetime()
65
last_seen: datetime.datetime() or None if not yet seen
66
timeout: datetime.timedelta(); How long from last_seen until
67
this client is invalid
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
68
180
interval: datetime.timedelta(); How often to start a new checker
69
181
stop_hook: If set, called by stop() as stop_hook(self)
70
182
checker: subprocess.Popen(); a running checker process used
71
183
to see if the client lives.
72
Is None if no process is running.
184
'None' if no process is running.
73
185
checker_initiator_tag: a gobject event source tag, or None
74
186
stop_initiator_tag: - '' -
75
187
checker_callback_tag: - '' -
76
188
checker_command: string; External command which is run to check if
77
client lives. %()s expansions are done at
189
client lives. %() expansions are done at
78
190
runtime with vars(self) as dict, so that for
79
191
instance %(name)s can be used in the command.
80
192
Private attibutes:
81
193
_timeout: Real variable for 'timeout'
82
194
_interval: Real variable for 'interval'
83
_timeout_milliseconds: Used by gobject.timeout_add()
195
_timeout_milliseconds: Used when calling gobject.timeout_add()
84
196
_interval_milliseconds: - '' -
85
197
"""
86
198
def _set_timeout(self, timeout):
106
218
interval = property(lambda self: self._interval,
107
219
_set_interval)
108
220
del _set_interval
109
def __init__(self, name=None, options=None, stop_hook=None,
110
fingerprint=None, secret=None, secfile=None, fqdn=None,
111
timeout=None, interval=-1, checker=None):
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."""
112
225
self.name = name
113
# Uppercase and remove spaces from fingerprint
114
# for later comparison purposes with return value of
115
# the fingerprint() function
116
self.fingerprint = fingerprint.upper().replace(u" ", u"")
117
if secret:
118
self.secret = secret.decode(u"base64")
119
elif secfile:
120
sf = open(secfile)
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"])
121
237
self.secret = sf.read()
122
238
sf.close()
123
239
else:
124
raise RuntimeError(u"No secret or secfile for client %s"
125
% self.name)
126
self.fqdn = fqdn # string
240
raise TypeError(u"No secret or secfile for client %s"
241
% self.name)
242
self.host = config.get("host", "")
127
243
self.created = datetime.datetime.now()
128
self.last_seen = None
129
if timeout is None:
130
timeout = options.timeout
131
self.timeout = timeout
132
if interval == -1:
133
interval = options.interval
134
else:
135
interval = string_to_delta(interval)
136
self.interval = interval
244
self.last_checked_ok = None
245
self.timeout = string_to_delta(config["timeout"])
246
self.interval = string_to_delta(config["interval"])
137
247
self.stop_hook = stop_hook
138
248
self.checker = None
139
249
self.checker_initiator_tag = None
140
250
self.stop_initiator_tag = None
141
251
self.checker_callback_tag = None
142
self.check_command = checker
252
self.check_command = config["checker"]
143
253
def start(self):
144
"""Start this clients checker and timeout hooks"""
254
"""Start this client's checker and timeout hooks"""
145
255
# Schedule a new checker to be started an 'interval' from now,
146
256
# and every interval from then on.
147
257
self.checker_initiator_tag = gobject.timeout_add\
155
265
self.stop)
156
266
def stop(self):
157
267
"""Stop this client.
158
The possibility that this client might be restarted is left
159
open, but not currently used."""
160
logger.debug(u"Stopping client %s", self.name)
161
self.secret = None
162
if self.stop_initiator_tag:
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):
163
277
gobject.source_remove(self.stop_initiator_tag)
164
278
self.stop_initiator_tag = None
165
if self.checker_initiator_tag:
279
if getattr(self, "checker_initiator_tag", False):
166
280
gobject.source_remove(self.checker_initiator_tag)
167
281
self.checker_initiator_tag = None
168
282
self.stop_checker()
171
285
# Do not run this again if called by a gobject.timeout_add
172
286
return False
173
287
def __del__(self):
174
# Some code duplication here and in stop()
175
if hasattr(self, "stop_initiator_tag") \
176
and self.stop_initiator_tag:
177
gobject.source_remove(self.stop_initiator_tag)
178
self.stop_initiator_tag = None
179
if hasattr(self, "checker_initiator_tag") \
180
and self.checker_initiator_tag:
181
gobject.source_remove(self.checker_initiator_tag)
182
self.checker_initiator_tag = None
183
self.stop_checker()
288
self.stop_hook = None
289
self.stop()
184
290
def checker_callback(self, pid, condition):
185
291
"""The checker has completed, so take appropriate actions."""
186
292
now = datetime.datetime.now()
293
self.checker_callback_tag = None
294
self.checker = None
187
295
if os.WIFEXITED(condition) \
188
296
and (os.WEXITSTATUS(condition) == 0):
189
logger.debug(u"Checker for %(name)s succeeded",
190
vars(self))
191
self.last_seen = now
297
logger.info(u"Checker for %(name)s succeeded",
298
vars(self))
299
self.last_checked_ok = now
192
300
gobject.source_remove(self.stop_initiator_tag)
193
301
self.stop_initiator_tag = gobject.timeout_add\
194
302
(self._timeout_milliseconds,
195
303
self.stop)
196
if not os.WIFEXITED(condition):
304
elif not os.WIFEXITED(condition):
197
305
logger.warning(u"Checker for %(name)s crashed?",
198
306
vars(self))
199
307
else:
200
logger.debug(u"Checker for %(name)s failed",
201
vars(self))
202
self.checker = None
203
self.checker_callback_tag = None
308
logger.info(u"Checker for %(name)s failed",
309
vars(self))
204
310
def start_checker(self):
205
311
"""Start a new checker subprocess if one is not running.
206
312
If a checker already exists, leave it running and do
207
313
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.
208
322
if self.checker is None:
209
logger.debug(u"Starting checker for %s",
210
self.name)
211
323
try:
212
command = self.check_command % self.fqdn
324
# In case check_command has exactly one % operator
325
command = self.check_command % self.host
213
326
except TypeError:
327
# Escape attributes for the shell
214
328
escaped_attrs = dict((key, re.escape(str(val)))
215
329
for key, val in
216
330
vars(self).iteritems())
217
331
try:
218
332
command = self.check_command % escaped_attrs
219
333
except TypeError, error:
220
logger.critical(u'Could not format string "%s": %s',
221
self.check_command, error)
334
logger.error(u'Could not format string "%s":'
335
u' %s', self.check_command, error)
222
336
return True # Try again later
223
337
try:
224
self.checker = subprocess.\
225
Popen(command,
226
stdout=subprocess.PIPE,
227
close_fds=True, shell=True,
228
cwd="/")
229
self.checker_callback_tag = gobject.\
230
child_watch_add(self.checker.pid,
231
self.\
232
checker_callback)
233
except subprocess.OSError, error:
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="/")
347
self.checker_callback_tag = gobject.child_watch_add\
348
(self.checker.pid,
349
self.checker_callback)
350
except OSError, error:
234
351
logger.error(u"Failed to start subprocess: %s",
235
352
error)
236
353
# Re-run this periodically if run by gobject.timeout_add
237
354
return True
238
355
def stop_checker(self):
239
356
"""Force the checker process, if any, to stop."""
240
if not hasattr(self, "checker") or self.checker is None:
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:
241
361
return
242
gobject.source_remove(self.checker_callback_tag)
243
self.checker_callback_tag = None
244
os.kill(self.checker.pid, signal.SIGTERM)
245
if self.checker.poll() is None:
246
os.kill(self.checker.pid, signal.SIGKILL)
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
247
371
self.checker = None
248
def still_valid(self, now=None):
372
def still_valid(self):
249
373
"""Has the timeout not yet passed for this client?"""
250
if now is None:
251
now = datetime.datetime.now()
252
if self.last_seen is None:
374
now = datetime.datetime.now()
375
if self.last_checked_ok is None:
253
376
return now < (self.created + self.timeout)
254
377
else:
255
return now < (self.last_seen + self.timeout)
378
return now < (self.last_checked_ok + self.timeout)
256
379
257
380
258
381
def peer_certificate(session):
382
"Return the peer's OpenPGP certificate as a bytestring"
259
383
# If not an OpenPGP certificate...
260
384
if gnutls.library.functions.gnutls_certificate_type_get\
261
385
(session._c_object) \
272
396
273
397
274
398
def fingerprint(openpgp):
275
# New empty GnuTLS certificate
276
crt = gnutls.library.types.gnutls_openpgp_crt_t()
277
gnutls.library.functions.gnutls_openpgp_crt_init\
278
(ctypes.byref(crt))
399
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
279
400
# New GnuTLS "datum" with the OpenPGP public key
280
401
datum = gnutls.library.types.gnutls_datum_t\
281
402
(ctypes.cast(ctypes.c_char_p(openpgp),
282
403
ctypes.POINTER(ctypes.c_ubyte)),
283
404
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))
284
409
# Import the OpenPGP public key into the certificate
285
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
286
(crt,
287
ctypes.byref(datum),
288
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
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")
289
420
# New buffer for the fingerprint
290
421
buffer = ctypes.create_string_buffer(20)
291
422
buffer_length = ctypes.c_size_t()
307
438
Note: This will run in its own forked process."""
308
439
309
440
def handle(self):
310
logger.debug(u"TCP connection from: %s",
441
logger.info(u"TCP connection from: %s",
311
442
unicode(self.client_address))
312
session = gnutls.connection.ClientSession(self.request,
313
gnutls.connection.\
314
X509Credentials())
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.
315
459
316
460
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
317
461
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
318
462
# "+DHE-DSS"))
319
priority = "SECURE256"
320
463
priority = "NORMAL" # Fallback default, since this
464
# MUST be set.
465
if self.server.settings["priority"]:
466
priority = self.server.settings["priority"]
321
467
gnutls.library.functions.gnutls_priority_set_direct\
322
468
(session._c_object, priority, None);
323
469
324
470
try:
325
471
session.handshake()
326
472
except gnutls.errors.GNUTLSError, error:
327
logger.debug(u"Handshake failed: %s", error)
473
logger.warning(u"Handshake failed: %s", error)
328
474
# Do not run session.bye() here: the session is not
329
475
# established. Just abandon the request.
330
476
return
331
477
try:
332
478
fpr = fingerprint(peer_certificate(session))
333
479
except (TypeError, gnutls.errors.GNUTLSError), error:
334
logger.debug(u"Bad certificate: %s", error)
480
logger.warning(u"Bad certificate: %s", error)
335
481
session.bye()
336
482
return
337
483
logger.debug(u"Fingerprint: %s", fpr)
338
484
client = None
339
for c in clients:
485
for c in self.server.clients:
340
486
if c.fingerprint == fpr:
341
487
client = c
342
488
break
489
if not client:
490
logger.warning(u"Client not found for fingerprint: %s",
491
fpr)
492
session.bye()
493
return
343
494
# Have to check if client.still_valid(), since it is possible
344
495
# that the client timed out while establishing the GnuTLS
345
496
# session.
346
if (not client) or (not client.still_valid()):
347
if client:
348
logger.debug(u"Client %(name)s is invalid",
349
vars(client))
350
else:
351
logger.debug(u"Client not found for fingerprint: %s",
352
fpr)
497
if not client.still_valid():
498
logger.warning(u"Client %(name)s is invalid",
499
vars(client))
353
500
session.bye()
354
501
return
355
502
sent_size = 0
365
512
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
366
513
"""IPv6 TCP server. Accepts 'None' as address and/or port.
367
514
Attributes:
368
options: Command line options
515
settings: Server settings
369
516
clients: Set() of Client objects
370
517
"""
371
518
address_family = socket.AF_INET6
372
519
def __init__(self, *args, **kwargs):
373
if "options" in kwargs:
374
self.options = kwargs["options"]
375
del kwargs["options"]
520
if "settings" in kwargs:
521
self.settings = kwargs["settings"]
522
del kwargs["settings"]
376
523
if "clients" in kwargs:
377
524
self.clients = kwargs["clients"]
378
525
del kwargs["clients"]
381
528
"""This overrides the normal server_bind() function
382
529
to bind to an interface if one was specified, and also NOT to
383
530
bind to an address or port if they were not specified."""
384
if self.options.interface:
385
if not hasattr(socket, "SO_BINDTODEVICE"):
386
# From /usr/include/asm-i486/socket.h
387
socket.SO_BINDTODEVICE = 25
531
if self.settings["interface"]:
532
# 25 is from /usr/include/asm-i486/socket.h
533
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
388
534
try:
389
535
self.socket.setsockopt(socket.SOL_SOCKET,
390
socket.SO_BINDTODEVICE,
391
self.options.interface)
536
SO_BINDTODEVICE,
537
self.settings["interface"])
392
538
except socket.error, error:
393
539
if error[0] == errno.EPERM:
394
logger.warning(u"No permission to"
395
u" bind to interface %s",
396
self.options.interface)
540
logger.error(u"No permission to"
541
u" bind to interface %s",
542
self.settings["interface"])
397
543
else:
398
544
raise error
399
545
# Only bind(2) the socket if we really need to.
402
548
in6addr_any = "::"
403
549
self.server_address = (in6addr_any,
404
550
self.server_address[1])
405
elif self.server_address[1] is None:
551
elif not self.server_address[1]:
406
552
self.server_address = (self.server_address[0],
407
553
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"]))
408
561
return super(type(self), self).server_bind()
409
562
410
563
421
574
datetime.timedelta(1)
422
575
>>> string_to_delta(u'1w')
423
576
datetime.timedelta(7)
577
>>> string_to_delta('5m 30s')
578
datetime.timedelta(0, 330)
424
579
"""
425
try:
426
suffix=unicode(interval[-1])
427
value=int(interval[:-1])
428
if suffix == u"d":
429
delta = datetime.timedelta(value)
430
elif suffix == u"s":
431
delta = datetime.timedelta(0, value)
432
elif suffix == u"m":
433
delta = datetime.timedelta(0, 0, 0, 0, value)
434
elif suffix == u"h":
435
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
436
elif suffix == u"w":
437
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
438
else:
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):
439
598
raise ValueError
440
except (ValueError, IndexError):
441
raise ValueError
442
return delta
443
444
445
def add_service():
446
"""From the Avahi server example code"""
447
global group, serviceName, serviceType, servicePort, serviceTXT, \
448
domain, host
449
if group is None:
450
group = dbus.Interface(
451
bus.get_object( avahi.DBUS_NAME,
452
server.EntryGroupNew()),
453
avahi.DBUS_INTERFACE_ENTRY_GROUP)
454
group.connect_to_signal('StateChanged',
455
entry_group_state_changed)
456
logger.debug(u"Adding service '%s' of type '%s' ...",
457
serviceName, serviceType)
458
459
group.AddService(
460
serviceInterface, # interface
461
avahi.PROTO_INET6, # protocol
462
dbus.UInt32(0), # flags
463
serviceName, serviceType,
464
domain, host,
465
dbus.UInt16(servicePort),
466
avahi.string_array_to_txt_array(serviceTXT))
467
group.Commit()
468
469
470
def remove_service():
471
"""From the Avahi server example code"""
472
global group
473
474
if not group is None:
475
group.Reset()
599
timevalue += delta
600
return timevalue
476
601
477
602
478
603
def server_state_changed(state):
479
"""From the Avahi server example code"""
604
"""Derived from the Avahi example code"""
480
605
if state == avahi.SERVER_COLLISION:
481
logger.warning(u"Server name collision")
482
remove_service()
606
logger.error(u"Server name collision")
607
service.remove()
483
608
elif state == avahi.SERVER_RUNNING:
484
add_service()
609
service.add()
485
610
486
611
487
612
def entry_group_state_changed(state, error):
488
"""From the Avahi server example code"""
489
global serviceName, server, rename_count
490
613
"""Derived from the Avahi example code"""
491
614
logger.debug(u"state change: %i", state)
492
615
493
616
if state == avahi.ENTRY_GROUP_ESTABLISHED:
494
617
logger.debug(u"Service established.")
495
618
elif state == avahi.ENTRY_GROUP_COLLISION:
496
497
rename_count = rename_count - 1
498
if rename_count > 0:
499
name = server.GetAlternativeServiceName(name)
500
logger.warning(u"Service name collision, "
501
u"changing name to '%s' ...", name)
502
remove_service()
503
add_service()
504
505
else:
506
logger.error(u"No suitable service name found "
507
u"after %i retries, exiting.",
508
n_rename)
509
main_loop.quit()
619
logger.warning(u"Service name collision.")
620
service.rename()
510
621
elif state == avahi.ENTRY_GROUP_FAILURE:
511
logger.error(u"Error in group state changed %s",
512
unicode(error))
513
main_loop.quit()
514
return
515
622
logger.critical(u"Error in group state changed %s",
623
unicode(error))
624
raise AvahiGroupError("State changed: %s", str(error))
516
625
517
626
def if_nametoindex(interface):
518
"""Call the C function if_nametoindex()"""
627
"""Call the C function if_nametoindex(), or equivalent"""
628
global if_nametoindex
519
629
try:
520
libc = ctypes.cdll.LoadLibrary("libc.so.6")
521
return libc.if_nametoindex(interface)
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
522
634
except (OSError, AttributeError):
523
635
if "struct" not in sys.modules:
524
636
import struct
525
637
if "fcntl" not in sys.modules:
526
638
import fcntl
527
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
528
s = socket.socket()
529
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
530
struct.pack("16s16x", interface))
531
s.close()
532
interface_index = struct.unpack("I", ifreq[16:20])[0]
533
return interface_index
534
535
536
if __name__ == '__main__':
537
parser = OptionParser()
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):
652
"""See daemon(3). Standard BSD Unix function.
653
This should really exist as os.daemon, but it doesn't (yet)."""
654
if os.fork():
655
sys.exit()
656
os.setsid()
657
if not nochdir:
658
os.chdir("/")
659
if os.fork():
660
sys.exit()
661
if not noclose:
662
# Close all standard open file descriptors
663
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
664
if not stat.S_ISCHR(os.fstat(null).st_mode):
665
raise OSError(errno.ENODEV,
666
"/dev/null not a character device")
667
os.dup2(null, sys.stdin.fileno())
668
os.dup2(null, sys.stdout.fileno())
669
os.dup2(null, sys.stderr.fileno())
670
if null > 2:
671
os.close(null)
672
673
674
def main():
675
global main_loop_started
676
main_loop_started = False
677
678
parser = OptionParser(version = "%%prog %s" % version)
538
679
parser.add_option("-i", "--interface", type="string",
539
default=None, metavar="IF",
540
help="Bind to interface IF")
541
parser.add_option("--cert", type="string", default="cert.pem",
542
metavar="FILE",
543
help="Public key certificate PEM file to use")
544
parser.add_option("--key", type="string", default="key.pem",
545
metavar="FILE",
546
help="Private key PEM file to use")
547
parser.add_option("--ca", type="string", default="ca.pem",
548
metavar="FILE",
549
help="Certificate Authority certificate PEM file to use")
550
parser.add_option("--crl", type="string", default="crl.pem",
551
metavar="FILE",
552
help="Certificate Revokation List PEM file to use")
553
parser.add_option("-p", "--port", type="int", default=None,
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",
554
684
help="Port number to receive requests on")
555
parser.add_option("--timeout", type="string", # Parsed later
556
default="1h",
557
help="Amount of downtime allowed for clients")
558
parser.add_option("--interval", type="string", # Parsed later
559
default="5m",
560
help="How often to check that a client is up")
561
685
parser.add_option("--check", action="store_true", default=False,
562
686
help="Run self-test")
563
parser.add_option("--debug", action="store_true", default=False,
564
help="Debug mode")
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")
565
698
(options, args) = parser.parse_args()
566
699
567
700
if options.check:
569
702
doctest.testmod()
570
703
sys.exit()
571
704
572
# Parse the time arguments
573
try:
574
options.timeout = string_to_delta(options.timeout)
575
except ValueError:
576
parser.error("option --timeout: Unparseable time")
577
try:
578
options.interval = string_to_delta(options.interval)
579
except ValueError:
580
parser.error("option --interval: Unparseable time")
581
582
# Parse config file
583
defaults = { "checker": "sleep 1; fping -q -- %%(fqdn)s" }
584
client_config = ConfigParser.SafeConfigParser(defaults)
585
#client_config.readfp(open("secrets.conf"), "secrets.conf")
586
client_config.read("mandos-clients.conf")
587
588
# From the Avahi server example code
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
589
768
DBusGMainLoop(set_as_default=True )
590
769
main_loop = gobject.MainLoop()
591
770
bus = dbus.SystemBus()
594
773
avahi.DBUS_INTERFACE_SERVER )
595
774
# End of Avahi example code
596
775
597
debug = options.debug
598
599
776
clients = Set()
600
777
def remove_from_clients(client):
601
778
clients.remove(client)
602
779
if not clients:
603
logger.debug(u"No clients left, exiting")
604
main_loop.quit()
780
logger.critical(u"No clients left, exiting")
781
sys.exit()
605
782
606
clients.update(Set(Client(name=section, options=options,
783
clients.update(Set(Client(name = section,
607
784
stop_hook = remove_from_clients,
608
**(dict(client_config\
609
.items(section))))
785
config
786
= dict(client_config.items(section)))
610
787
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())
814
815
def cleanup():
816
"Cleanup function; run on exit"
817
global group
818
# From the Avahi example code
819
if not group is None:
820
group.Free()
821
group = None
822
# End of Avahi example code
823
824
while clients:
825
client = clients.pop()
826
client.stop_hook = None
827
client.stop()
828
829
atexit.register(cleanup)
830
831
if not debug:
832
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())
835
611
836
for client in clients:
612
837
client.start()
613
838
614
tcp_server = IPv6_TCPServer((None, options.port),
839
tcp_server = IPv6_TCPServer((server_settings["address"],
840
server_settings["port"]),
615
841
tcp_handler,
616
options=options,
842
settings=server_settings,
617
843
clients=clients)
618
# Find out what random port we got
619
servicePort = tcp_server.socket.getsockname()[1]
620
logger.debug(u"Now listening on port %d", servicePort)
621
622
if options.interface is not None:
623
serviceInterface = if_nametoindex(options.interface)
624
625
# From the Avahi server example code
626
server.connect_to_signal("StateChanged", server_state_changed)
627
server_state_changed(server.GetState())
628
# End of Avahi example code
629
630
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
631
lambda *args, **kwargs:
632
tcp_server.handle_request(*args[2:],
633
**kwargs) or True)
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
634
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")
867
main_loop_started = True
635
868
main_loop.run()
869
except AvahiError, error:
870
logger.critical(u"AvahiError: %s" + unicode(error))
871
sys.exit(1)
636
872
except KeyboardInterrupt:
637
print
638
639
# Cleanup here
873
if debug:
874
print
640
875
641
# From the Avahi server example code
642
if not group is None:
643
group.Free()
644
# End of Avahi example code
645
646
for client in clients:
647
client.stop_hook = None
648
client.stop()
876
if __name__ == '__main__':
877
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0