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- Committer: Björn Påhlsson
- Date: 2008-07-22 05:26:44 UTC
- mto: (237.7.1 mandos) (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 26.
- Revision ID: belorn@braxen-20080722052644-tq76a3jnr2ea1jez
Added syntax and support for plugbasedclient arguments and how they
are passed on to the plugins.
are passed on to the plugins.
- files added:
- ca.pem
- files removed:
- mandos-client.xml
- files renamed:
- clients.conf => mandos-clients.conf
- mandos-client.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
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
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".
9
# following functions: "add_service", "remove_service",
10
# "server_state_changed", "entry_group_state_changed", and some lines
11
# in "main".
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12
#
13
# Everything else is
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
13
# Everything else is Copyright © 2007-2008 Teddy Hogeborn and Björn
14
# Påhlsson.
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#
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# This program is free software: you can redistribute it and/or modify
17
17
# it under the terms of the GNU General Public License as published by
26
26
# You should have received a copy of the GNU General Public License
27
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
28
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#
29
# Contact the authors at <mandos@fukt.bsnet.se>.
29
# Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
30
# <https://www.fukt.bsnet.se/~teddy/>.
30
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#
31
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32
33
from __future__ import division
61
62
from dbus.mainloop.glib import DBusGMainLoop
62
63
import ctypes
63
64
64
version = "1.0"
65
# Brief description of the operation of this program:
66
#
67
# This server announces itself as a Zeroconf service. Connecting
68
# clients use the TLS protocol, with the unusual quirk that this
69
# server program acts as a TLS "client" while the connecting clients
70
# acts as a TLS "server". The clients (acting as a TLS "server") must
71
# supply an OpenPGP certificate, and the fingerprint of this
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# certificate is used by this server to look up (in a list read from a
73
# file at start time) which binary blob to give the client. No other
74
# authentication or authorization is done by this server.
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76
66
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logger = logging.Logger('mandos')
67
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syslogger = logging.handlers.SysLogHandler\
68
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
69
address = "/dev/log")
79
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
70
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syslogger.setFormatter(logging.Formatter\
71
('Mandos: %(levelname)s: %(message)s'))
81
('%(levelname)s: %(message)s'))
72
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logger.addHandler(syslogger)
73
74
75
class AvahiError(Exception):
76
def __init__(self, value):
77
self.value = value
78
def __str__(self):
79
return repr(self.value)
80
81
class AvahiServiceError(AvahiError):
82
pass
83
84
class AvahiGroupError(AvahiError):
85
pass
86
87
88
class AvahiService(object):
89
"""An Avahi (Zeroconf) service.
90
Attributes:
91
interface: integer; avahi.IF_UNSPEC or an interface index.
92
Used to optionally bind to the specified interface.
93
name: string; Example: 'Mandos'
94
type: string; Example: '_mandos._tcp'.
95
See <http://www.dns-sd.org/ServiceTypes.html>
96
port: integer; what port to announce
97
TXT: list of strings; TXT record for the service
98
domain: string; Domain to publish on, default to .local if empty.
99
host: string; Host to publish records for, default is localhost
100
max_renames: integer; maximum number of renames
101
rename_count: integer; counter so we only rename after collisions
102
a sensible number of times
103
"""
104
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
105
type = None, port = None, TXT = None, domain = "",
106
host = "", max_renames = 32768):
107
self.interface = interface
108
self.name = name
109
self.type = type
110
self.port = port
111
if TXT is None:
112
self.TXT = []
113
else:
114
self.TXT = TXT
115
self.domain = domain
116
self.host = host
117
self.rename_count = 0
118
def rename(self):
119
"""Derived from the Avahi example code"""
120
if self.rename_count >= self.max_renames:
121
logger.critical(u"No suitable service name found after %i"
122
u" retries, exiting.", rename_count)
123
raise AvahiServiceError("Too many renames")
124
name = server.GetAlternativeServiceName(name)
125
logger.error(u"Changing name to %r ...", name)
126
syslogger.setFormatter(logging.Formatter\
127
('Mandos (%s): %%(levelname)s:'
128
' %%(message)s' % name))
129
self.remove()
130
self.add()
131
self.rename_count += 1
132
def remove(self):
133
"""Derived from the Avahi example code"""
134
if group is not None:
135
group.Reset()
136
def add(self):
137
"""Derived from the Avahi example code"""
138
global group
139
if group is None:
140
group = dbus.Interface\
141
(bus.get_object(avahi.DBUS_NAME,
142
server.EntryGroupNew()),
143
avahi.DBUS_INTERFACE_ENTRY_GROUP)
144
group.connect_to_signal('StateChanged',
145
entry_group_state_changed)
146
logger.debug(u"Adding service '%s' of type '%s' ...",
147
service.name, service.type)
148
group.AddService(
149
self.interface, # interface
150
avahi.PROTO_INET6, # protocol
151
dbus.UInt32(0), # flags
152
self.name, self.type,
153
self.domain, self.host,
154
dbus.UInt16(self.port),
155
avahi.string_array_to_txt_array(self.TXT))
156
group.Commit()
157
83
del syslogger
84
85
# This variable is used to optionally bind to a specified interface.
86
# It is a global variable to fit in with the other variables from the
87
# Avahi example code.
88
serviceInterface = avahi.IF_UNSPEC
158
89
# From the Avahi example code:
159
group = None # our entry group
90
serviceName = "Mandos"
91
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
92
servicePort = None # Not known at startup
93
serviceTXT = [] # TXT record for the service
94
domain = "" # Domain to publish on, default to .local
95
host = "" # Host to publish records for, default to localhost
96
group = None #our entry group
97
rename_count = 12 # Counter so we only rename after collisions a
98
# sensible number of times
160
99
# End of Avahi example code
161
100
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101
167
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fingerprint: string (40 or 32 hexadecimal digits); used to
168
107
uniquely identify the client
169
108
secret: bytestring; sent verbatim (over TLS) to client
170
host: string; available for use by the checker command
171
created: datetime.datetime(); object creation, not client host
172
last_checked_ok: datetime.datetime() or None if not yet checked OK
173
timeout: datetime.timedelta(); How long from last_checked_ok
174
until this client is invalid
109
fqdn: string (FQDN); available for use by the checker command
110
created: datetime.datetime()
111
last_seen: datetime.datetime() or None if not yet seen
112
timeout: datetime.timedelta(); How long from last_seen until
113
this client is invalid
175
114
interval: datetime.timedelta(); How often to start a new checker
176
115
stop_hook: If set, called by stop() as stop_hook(self)
177
116
checker: subprocess.Popen(); a running checker process used
178
117
to see if the client lives.
179
'None' if no process is running.
118
Is None if no process is running.
180
119
checker_initiator_tag: a gobject event source tag, or None
181
120
stop_initiator_tag: - '' -
182
121
checker_callback_tag: - '' -
183
122
checker_command: string; External command which is run to check if
184
client lives. %() expansions are done at
123
client lives. %()s expansions are done at
185
124
runtime with vars(self) as dict, so that for
186
125
instance %(name)s can be used in the command.
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126
Private attibutes:
188
127
_timeout: Real variable for 'timeout'
189
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_interval: Real variable for 'interval'
190
_timeout_milliseconds: Used when calling gobject.timeout_add()
129
_timeout_milliseconds: Used by gobject.timeout_add()
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_interval_milliseconds: - '' -
192
131
"""
193
132
def _set_timeout(self, timeout):
213
152
interval = property(lambda self: self._interval,
214
153
_set_interval)
215
154
del _set_interval
216
def __init__(self, name = None, stop_hook=None, config={}):
217
"""Note: the 'checker' key in 'config' sets the
218
'checker_command' attribute and *not* the 'checker'
219
attribute."""
155
def __init__(self, name=None, options=None, stop_hook=None,
156
fingerprint=None, secret=None, secfile=None,
157
fqdn=None, timeout=None, interval=-1, checker=None):
158
"""Note: the 'checker' argument sets the 'checker_command'
159
attribute and not the 'checker' attribute.."""
220
160
self.name = name
221
logger.debug(u"Creating client %r", self.name)
222
# Uppercase and remove spaces from fingerprint for later
223
# comparison purposes with return value from the fingerprint()
224
# function
225
self.fingerprint = config["fingerprint"].upper()\
226
.replace(u" ", u"")
227
logger.debug(u" Fingerprint: %s", self.fingerprint)
228
if "secret" in config:
229
self.secret = config["secret"].decode(u"base64")
230
elif "secfile" in config:
231
sf = open(config["secfile"])
161
# Uppercase and remove spaces from fingerprint
162
# for later comparison purposes with return value of
163
# the fingerprint() function
164
self.fingerprint = fingerprint.upper().replace(u" ", u"")
165
if secret:
166
self.secret = secret.decode(u"base64")
167
elif secfile:
168
sf = open(secfile)
232
169
self.secret = sf.read()
233
170
sf.close()
234
171
else:
235
raise TypeError(u"No secret or secfile for client %s"
236
% self.name)
237
self.host = config.get("host", "")
172
raise RuntimeError(u"No secret or secfile for client %s"
173
% self.name)
174
self.fqdn = fqdn # string
238
175
self.created = datetime.datetime.now()
239
self.last_checked_ok = None
240
self.timeout = string_to_delta(config["timeout"])
241
self.interval = string_to_delta(config["interval"])
176
self.last_seen = None
177
if timeout is None:
178
self.timeout = options.timeout
179
else:
180
self.timeout = string_to_delta(timeout)
181
if interval == -1:
182
self.interval = options.interval
183
else:
184
self.interval = string_to_delta(interval)
242
185
self.stop_hook = stop_hook
243
186
self.checker = None
244
187
self.checker_initiator_tag = None
245
188
self.stop_initiator_tag = None
246
189
self.checker_callback_tag = None
247
self.check_command = config["checker"]
190
self.check_command = checker
248
191
def start(self):
249
192
"""Start this client's checker and timeout hooks"""
250
193
# Schedule a new checker to be started an 'interval' from now,
260
203
self.stop)
261
204
def stop(self):
262
205
"""Stop this client.
263
The possibility that a client might be restarted is left open,
264
but not currently used."""
206
The possibility that this client might be restarted is left
207
open, but not currently used."""
265
208
# If this client doesn't have a secret, it is already stopped.
266
if hasattr(self, "secret") and self.secret:
267
logger.info(u"Stopping client %s", self.name)
209
if self.secret:
210
logger.debug(u"Stopping client %s", self.name)
268
211
self.secret = None
269
212
else:
270
213
return False
271
if getattr(self, "stop_initiator_tag", False):
214
if hasattr(self, "stop_initiator_tag") \
215
and self.stop_initiator_tag:
272
216
gobject.source_remove(self.stop_initiator_tag)
273
217
self.stop_initiator_tag = None
274
if getattr(self, "checker_initiator_tag", False):
218
if hasattr(self, "checker_initiator_tag") \
219
and self.checker_initiator_tag:
275
220
gobject.source_remove(self.checker_initiator_tag)
276
221
self.checker_initiator_tag = None
277
222
self.stop_checker()
289
234
self.checker = None
290
235
if os.WIFEXITED(condition) \
291
236
and (os.WEXITSTATUS(condition) == 0):
292
logger.info(u"Checker for %(name)s succeeded",
293
vars(self))
294
self.last_checked_ok = now
237
logger.debug(u"Checker for %(name)s succeeded",
238
vars(self))
239
self.last_seen = now
295
240
gobject.source_remove(self.stop_initiator_tag)
296
241
self.stop_initiator_tag = gobject.timeout_add\
297
242
(self._timeout_milliseconds,
300
245
logger.warning(u"Checker for %(name)s crashed?",
301
246
vars(self))
302
247
else:
303
logger.info(u"Checker for %(name)s failed",
304
vars(self))
248
logger.debug(u"Checker for %(name)s failed",
249
vars(self))
305
250
def start_checker(self):
306
251
"""Start a new checker subprocess if one is not running.
307
252
If a checker already exists, leave it running and do
316
261
# is as it should be.
317
262
if self.checker is None:
318
263
try:
319
# In case check_command has exactly one % operator
320
command = self.check_command % self.host
264
command = self.check_command % self.fqdn
321
265
except TypeError:
322
# Escape attributes for the shell
323
266
escaped_attrs = dict((key, re.escape(str(val)))
324
267
for key, val in
325
268
vars(self).iteritems())
326
269
try:
327
270
command = self.check_command % escaped_attrs
328
271
except TypeError, error:
329
logger.error(u'Could not format string "%s":'
330
u' %s', self.check_command, error)
272
logger.critical(u'Could not format string "%s":'
273
u' %s', self.check_command, error)
331
274
return True # Try again later
332
275
try:
333
logger.info(u"Starting checker %r for %s",
334
command, self.name)
335
self.checker = subprocess.Popen(command,
336
close_fds=True,
337
shell=True, cwd="/")
276
logger.debug(u"Starting checker %r for %s",
277
command, self.name)
278
self.checker = subprocess.\
279
Popen(command,
280
close_fds=True, shell=True,
281
cwd="/")
338
282
self.checker_callback_tag = gobject.child_watch_add\
339
283
(self.checker.pid,
340
284
self.checker_callback)
348
292
if self.checker_callback_tag:
349
293
gobject.source_remove(self.checker_callback_tag)
350
294
self.checker_callback_tag = None
351
if getattr(self, "checker", None) is None:
295
if not hasattr(self, "checker") or self.checker is None:
352
296
return
353
logger.debug(u"Stopping checker for %(name)s", vars(self))
297
logger.debug("Stopping checker for %(name)s", vars(self))
354
298
try:
355
299
os.kill(self.checker.pid, signal.SIGTERM)
356
300
#os.sleep(0.5)
357
301
#if self.checker.poll() is None:
358
302
# os.kill(self.checker.pid, signal.SIGKILL)
359
303
except OSError, error:
360
if error.errno != errno.ESRCH: # No such process
304
if error.errno != errno.ESRCH:
361
305
raise
362
306
self.checker = None
363
def still_valid(self):
307
def still_valid(self, now=None):
364
308
"""Has the timeout not yet passed for this client?"""
365
now = datetime.datetime.now()
366
if self.last_checked_ok is None:
309
if now is None:
310
now = datetime.datetime.now()
311
if self.last_seen is None:
367
312
return now < (self.created + self.timeout)
368
313
else:
369
return now < (self.last_checked_ok + self.timeout)
314
return now < (self.last_seen + self.timeout)
370
315
371
316
372
317
def peer_certificate(session):
388
333
389
334
def fingerprint(openpgp):
390
335
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
336
# New empty GnuTLS certificate
337
crt = gnutls.library.types.gnutls_openpgp_crt_t()
338
gnutls.library.functions.gnutls_openpgp_crt_init\
339
(ctypes.byref(crt))
391
340
# New GnuTLS "datum" with the OpenPGP public key
392
341
datum = gnutls.library.types.gnutls_datum_t\
393
342
(ctypes.cast(ctypes.c_char_p(openpgp),
394
343
ctypes.POINTER(ctypes.c_ubyte)),
395
344
ctypes.c_uint(len(openpgp)))
396
# New empty GnuTLS certificate
397
crt = gnutls.library.types.gnutls_openpgp_crt_t()
398
gnutls.library.functions.gnutls_openpgp_crt_init\
399
(ctypes.byref(crt))
400
345
# Import the OpenPGP public key into the certificate
401
gnutls.library.functions.gnutls_openpgp_crt_import\
402
(crt, ctypes.byref(datum),
403
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
346
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
347
(crt,
348
ctypes.byref(datum),
349
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
404
350
# New buffer for the fingerprint
405
351
buffer = ctypes.create_string_buffer(20)
406
352
buffer_length = ctypes.c_size_t()
422
368
Note: This will run in its own forked process."""
423
369
424
370
def handle(self):
425
logger.info(u"TCP connection from: %s",
371
logger.debug(u"TCP connection from: %s",
426
372
unicode(self.client_address))
427
session = gnutls.connection.ClientSession\
428
(self.request, gnutls.connection.X509Credentials())
429
430
line = self.request.makefile().readline()
431
logger.debug(u"Protocol version: %r", line)
432
try:
433
if int(line.strip().split()[0]) > 1:
434
raise RuntimeError
435
except (ValueError, IndexError, RuntimeError), error:
436
logger.error(u"Unknown protocol version: %s", error)
437
return
438
439
# Note: gnutls.connection.X509Credentials is really a generic
440
# GnuTLS certificate credentials object so long as no X.509
441
# keys are added to it. Therefore, we can use it here despite
442
# using OpenPGP certificates.
373
session = gnutls.connection.ClientSession(self.request,
374
gnutls.connection.\
375
X509Credentials())
443
376
444
377
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
445
378
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
446
379
# "+DHE-DSS"))
447
priority = "NORMAL" # Fallback default, since this
448
# MUST be set.
449
if self.server.settings["priority"]:
450
priority = self.server.settings["priority"]
380
priority = "SECURE256"
381
451
382
gnutls.library.functions.gnutls_priority_set_direct\
452
383
(session._c_object, priority, None);
453
384
454
385
try:
455
386
session.handshake()
456
387
except gnutls.errors.GNUTLSError, error:
457
logger.warning(u"Handshake failed: %s", error)
388
logger.debug(u"Handshake failed: %s", error)
458
389
# Do not run session.bye() here: the session is not
459
390
# established. Just abandon the request.
460
391
return
461
392
try:
462
393
fpr = fingerprint(peer_certificate(session))
463
394
except (TypeError, gnutls.errors.GNUTLSError), error:
464
logger.warning(u"Bad certificate: %s", error)
395
logger.debug(u"Bad certificate: %s", error)
465
396
session.bye()
466
397
return
467
398
logger.debug(u"Fingerprint: %s", fpr)
470
401
if c.fingerprint == fpr:
471
402
client = c
472
403
break
473
if not client:
474
logger.warning(u"Client not found for fingerprint: %s",
475
fpr)
476
session.bye()
477
return
478
404
# Have to check if client.still_valid(), since it is possible
479
405
# that the client timed out while establishing the GnuTLS
480
406
# session.
481
if not client.still_valid():
482
logger.warning(u"Client %(name)s is invalid",
483
vars(client))
407
if (not client) or (not client.still_valid()):
408
if client:
409
logger.debug(u"Client %(name)s is invalid",
410
vars(client))
411
else:
412
logger.debug(u"Client not found for fingerprint: %s",
413
fpr)
484
414
session.bye()
485
415
return
486
416
sent_size = 0
496
426
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
497
427
"""IPv6 TCP server. Accepts 'None' as address and/or port.
498
428
Attributes:
499
settings: Server settings
429
options: Command line options
500
430
clients: Set() of Client objects
501
431
"""
502
432
address_family = socket.AF_INET6
503
433
def __init__(self, *args, **kwargs):
504
if "settings" in kwargs:
505
self.settings = kwargs["settings"]
506
del kwargs["settings"]
434
if "options" in kwargs:
435
self.options = kwargs["options"]
436
del kwargs["options"]
507
437
if "clients" in kwargs:
508
438
self.clients = kwargs["clients"]
509
439
del kwargs["clients"]
512
442
"""This overrides the normal server_bind() function
513
443
to bind to an interface if one was specified, and also NOT to
514
444
bind to an address or port if they were not specified."""
515
if self.settings["interface"]:
516
# 25 is from /usr/include/asm-i486/socket.h
517
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
445
if self.options.interface:
446
if not hasattr(socket, "SO_BINDTODEVICE"):
447
# From /usr/include/asm-i486/socket.h
448
socket.SO_BINDTODEVICE = 25
518
449
try:
519
450
self.socket.setsockopt(socket.SOL_SOCKET,
520
SO_BINDTODEVICE,
521
self.settings["interface"])
451
socket.SO_BINDTODEVICE,
452
self.options.interface)
522
453
except socket.error, error:
523
454
if error[0] == errno.EPERM:
524
logger.error(u"No permission to"
525
u" bind to interface %s",
526
self.settings["interface"])
455
logger.warning(u"No permission to"
456
u" bind to interface %s",
457
self.options.interface)
527
458
else:
528
459
raise error
529
460
# Only bind(2) the socket if we really need to.
532
463
in6addr_any = "::"
533
464
self.server_address = (in6addr_any,
534
465
self.server_address[1])
535
elif not self.server_address[1]:
466
elif self.server_address[1] is None:
536
467
self.server_address = (self.server_address[0],
537
468
0)
538
# if self.settings["interface"]:
539
# self.server_address = (self.server_address[0],
540
# 0, # port
541
# 0, # flowinfo
542
# if_nametoindex
543
# (self.settings
544
# ["interface"]))
545
469
return super(type(self), self).server_bind()
546
470
547
471
579
503
return delta
580
504
581
505
506
def add_service():
507
"""Derived from the Avahi example code"""
508
global group, serviceName, serviceType, servicePort, serviceTXT, \
509
domain, host
510
if group is None:
511
group = dbus.Interface(
512
bus.get_object( avahi.DBUS_NAME,
513
server.EntryGroupNew()),
514
avahi.DBUS_INTERFACE_ENTRY_GROUP)
515
group.connect_to_signal('StateChanged',
516
entry_group_state_changed)
517
logger.debug(u"Adding service '%s' of type '%s' ...",
518
serviceName, serviceType)
519
520
group.AddService(
521
serviceInterface, # interface
522
avahi.PROTO_INET6, # protocol
523
dbus.UInt32(0), # flags
524
serviceName, serviceType,
525
domain, host,
526
dbus.UInt16(servicePort),
527
avahi.string_array_to_txt_array(serviceTXT))
528
group.Commit()
529
530
531
def remove_service():
532
"""From the Avahi example code"""
533
global group
534
535
if not group is None:
536
group.Reset()
537
538
582
539
def server_state_changed(state):
583
540
"""Derived from the Avahi example code"""
584
541
if state == avahi.SERVER_COLLISION:
585
logger.error(u"Server name collision")
586
service.remove()
542
logger.warning(u"Server name collision")
543
remove_service()
587
544
elif state == avahi.SERVER_RUNNING:
588
service.add()
545
add_service()
589
546
590
547
591
548
def entry_group_state_changed(state, error):
592
549
"""Derived from the Avahi example code"""
550
global serviceName, server, rename_count
551
593
552
logger.debug(u"state change: %i", state)
594
553
595
554
if state == avahi.ENTRY_GROUP_ESTABLISHED:
596
555
logger.debug(u"Service established.")
597
556
elif state == avahi.ENTRY_GROUP_COLLISION:
598
logger.warning(u"Service name collision.")
599
service.rename()
557
558
rename_count = rename_count - 1
559
if rename_count > 0:
560
name = server.GetAlternativeServiceName(name)
561
logger.warning(u"Service name collision, "
562
u"changing name to '%s' ...", name)
563
remove_service()
564
add_service()
565
566
else:
567
logger.error(u"No suitable service name found after %i"
568
u" retries, exiting.", n_rename)
569
killme(1)
600
570
elif state == avahi.ENTRY_GROUP_FAILURE:
601
logger.critical(u"Error in group state changed %s",
602
unicode(error))
603
raise AvahiGroupError("State changed: %s", str(error))
571
logger.error(u"Error in group state changed %s",
572
unicode(error))
573
killme(1)
574
604
575
605
576
def if_nametoindex(interface):
606
"""Call the C function if_nametoindex(), or equivalent"""
607
global if_nametoindex
577
"""Call the C function if_nametoindex()"""
608
578
try:
609
if "ctypes.util" not in sys.modules:
610
import ctypes.util
611
if_nametoindex = ctypes.cdll.LoadLibrary\
612
(ctypes.util.find_library("c")).if_nametoindex
579
libc = ctypes.cdll.LoadLibrary("libc.so.6")
580
return libc.if_nametoindex(interface)
613
581
except (OSError, AttributeError):
614
582
if "struct" not in sys.modules:
615
583
import struct
616
584
if "fcntl" not in sys.modules:
617
585
import fcntl
618
def if_nametoindex(interface):
619
"Get an interface index the hard way, i.e. using fcntl()"
620
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
621
s = socket.socket()
622
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
623
struct.pack("16s16x", interface))
624
s.close()
625
interface_index = struct.unpack("I", ifreq[16:20])[0]
626
return interface_index
627
return if_nametoindex(interface)
628
629
630
def daemon(nochdir = False, noclose = False):
586
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
587
s = socket.socket()
588
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
589
struct.pack("16s16x", interface))
590
s.close()
591
interface_index = struct.unpack("I", ifreq[16:20])[0]
592
return interface_index
593
594
595
def daemon(nochdir, noclose):
631
596
"""See daemon(3). Standard BSD Unix function.
632
597
This should really exist as os.daemon, but it doesn't (yet)."""
633
598
if os.fork():
635
600
os.setsid()
636
601
if not nochdir:
637
602
os.chdir("/")
638
if os.fork():
639
sys.exit()
640
603
if not noclose:
641
604
# Close all standard open file descriptors
642
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
605
null = os.open("/dev/null", os.O_NOCTTY | os.O_RDWR)
643
606
if not stat.S_ISCHR(os.fstat(null).st_mode):
644
607
raise OSError(errno.ENODEV,
645
608
"/dev/null not a character device")
650
613
os.close(null)
651
614
652
615
616
def killme(status = 0):
617
logger.debug("Stopping server with exit status %d", status)
618
exitstatus = status
619
if main_loop_started:
620
main_loop.quit()
621
else:
622
sys.exit(status)
623
624
653
625
def main():
626
global exitstatus
627
exitstatus = 0
654
628
global main_loop_started
655
629
main_loop_started = False
656
630
657
parser = OptionParser(version = "Mandos server %s" % version)
631
parser = OptionParser()
658
632
parser.add_option("-i", "--interface", type="string",
659
metavar="IF", help="Bind to interface IF")
660
parser.add_option("-a", "--address", type="string",
633
default=None, metavar="IF",
634
help="Bind to interface IF")
635
parser.add_option("-a", "--address", type="string", default=None,
661
636
help="Address to listen for requests on")
662
parser.add_option("-p", "--port", type="int",
637
parser.add_option("-p", "--port", type="int", default=None,
663
638
help="Port number to receive requests on")
639
parser.add_option("--timeout", type="string", # Parsed later
640
default="1h",
641
help="Amount of downtime allowed for clients")
642
parser.add_option("--interval", type="string", # Parsed later
643
default="5m",
644
help="How often to check that a client is up")
664
645
parser.add_option("--check", action="store_true", default=False,
665
646
help="Run self-test")
666
parser.add_option("--debug", action="store_true",
667
help="Debug mode; run in foreground and log to"
668
" terminal")
669
parser.add_option("--priority", type="string", help="GnuTLS"
670
" priority string (see GnuTLS documentation)")
671
parser.add_option("--servicename", type="string", metavar="NAME",
672
help="Zeroconf service name")
673
parser.add_option("--configdir", type="string",
674
default="/etc/mandos", metavar="DIR",
675
help="Directory to search for configuration"
676
" files")
647
parser.add_option("--debug", action="store_true", default=False,
648
help="Debug mode")
677
649
(options, args) = parser.parse_args()
678
650
679
651
if options.check:
681
653
doctest.testmod()
682
654
sys.exit()
683
655
684
# Default values for config file for server-global settings
685
server_defaults = { "interface": "",
686
"address": "",
687
"port": "",
688
"debug": "False",
689
"priority":
690
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
691
"servicename": "Mandos",
692
}
693
694
# Parse config file for server-global settings
695
server_config = ConfigParser.SafeConfigParser(server_defaults)
696
del server_defaults
697
server_config.read(os.path.join(options.configdir, "mandos.conf"))
698
server_section = "server"
699
# Convert the SafeConfigParser object to a dict
700
server_settings = dict(server_config.items(server_section))
701
# Use getboolean on the boolean config option
702
server_settings["debug"] = server_config.getboolean\
703
(server_section, "debug")
704
del server_config
705
706
# Override the settings from the config file with command line
707
# options, if set.
708
for option in ("interface", "address", "port", "debug",
709
"priority", "servicename", "configdir"):
710
value = getattr(options, option)
711
if value is not None:
712
server_settings[option] = value
713
del options
714
# Now we have our good server settings in "server_settings"
715
716
debug = server_settings["debug"]
717
718
if not debug:
719
syslogger.setLevel(logging.WARNING)
720
721
if server_settings["servicename"] != "Mandos":
722
syslogger.setFormatter(logging.Formatter\
723
('Mandos (%s): %%(levelname)s:'
724
' %%(message)s'
725
% server_settings["servicename"]))
726
727
# Parse config file with clients
728
client_defaults = { "timeout": "1h",
729
"interval": "5m",
730
"checker": "fping -q -- %%(host)s",
731
}
732
client_config = ConfigParser.SafeConfigParser(client_defaults)
733
client_config.read(os.path.join(server_settings["configdir"],
734
"clients.conf"))
735
736
global service
737
service = AvahiService(name = server_settings["servicename"],
738
type = "_mandos._tcp", );
739
if server_settings["interface"]:
740
service.interface = if_nametoindex(server_settings["interface"])
656
# Parse the time arguments
657
try:
658
options.timeout = string_to_delta(options.timeout)
659
except ValueError:
660
parser.error("option --timeout: Unparseable time")
661
try:
662
options.interval = string_to_delta(options.interval)
663
except ValueError:
664
parser.error("option --interval: Unparseable time")
665
666
# Parse config file
667
defaults = { "checker": "fping -q -- %%(fqdn)s" }
668
client_config = ConfigParser.SafeConfigParser(defaults)
669
#client_config.readfp(open("global.conf"), "global.conf")
670
client_config.read("mandos-clients.conf")
741
671
742
672
global main_loop
743
673
global bus
751
681
avahi.DBUS_INTERFACE_SERVER )
752
682
# End of Avahi example code
753
683
684
debug = options.debug
685
754
686
if debug:
755
687
console = logging.StreamHandler()
756
688
# console.setLevel(logging.DEBUG)
763
695
def remove_from_clients(client):
764
696
clients.remove(client)
765
697
if not clients:
766
logger.critical(u"No clients left, exiting")
767
sys.exit()
698
logger.debug(u"No clients left, exiting")
699
killme()
768
700
769
clients.update(Set(Client(name = section,
701
clients.update(Set(Client(name=section, options=options,
770
702
stop_hook = remove_from_clients,
771
config
772
= dict(client_config.items(section)))
703
**(dict(client_config\
704
.items(section))))
773
705
for section in client_config.sections()))
774
if not clients:
775
logger.critical(u"No clients defined")
776
sys.exit(1)
777
706
778
707
if not debug:
779
daemon()
780
781
pidfilename = "/var/run/mandos/mandos.pid"
782
pid = os.getpid()
783
try:
784
pidfile = open(pidfilename, "w")
785
pidfile.write(str(pid) + "\n")
786
pidfile.close()
787
del pidfile
788
except IOError, err:
789
logger.error(u"Could not write %s file with PID %d",
790
pidfilename, os.getpid())
708
daemon(False, False)
791
709
792
710
def cleanup():
793
711
"Cleanup function; run on exit"
807
725
808
726
if not debug:
809
727
signal.signal(signal.SIGINT, signal.SIG_IGN)
810
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
811
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
728
signal.signal(signal.SIGHUP, lambda signum, frame: killme())
729
signal.signal(signal.SIGTERM, lambda signum, frame: killme())
812
730
813
731
for client in clients:
814
732
client.start()
815
733
816
tcp_server = IPv6_TCPServer((server_settings["address"],
817
server_settings["port"]),
734
tcp_server = IPv6_TCPServer((options.address, options.port),
818
735
tcp_handler,
819
settings=server_settings,
736
options=options,
820
737
clients=clients)
821
# Find out what port we got
822
service.port = tcp_server.socket.getsockname()[1]
823
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
824
u" scope_id %d" % tcp_server.socket.getsockname())
825
826
#service.interface = tcp_server.socket.getsockname()[3]
827
828
try:
829
# From the Avahi example code
830
server.connect_to_signal("StateChanged", server_state_changed)
831
try:
832
server_state_changed(server.GetState())
833
except dbus.exceptions.DBusException, error:
834
logger.critical(u"DBusException: %s", error)
835
sys.exit(1)
836
# End of Avahi example code
837
838
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
839
lambda *args, **kwargs:
840
tcp_server.handle_request\
841
(*args[2:], **kwargs) or True)
842
843
logger.debug(u"Starting main loop")
738
# Find out what random port we got
739
global servicePort
740
servicePort = tcp_server.socket.getsockname()[1]
741
logger.debug(u"Now listening on port %d", servicePort)
742
743
if options.interface is not None:
744
global serviceInterface
745
serviceInterface = if_nametoindex(options.interface)
746
747
# From the Avahi example code
748
server.connect_to_signal("StateChanged", server_state_changed)
749
try:
750
server_state_changed(server.GetState())
751
except dbus.exceptions.DBusException, error:
752
logger.critical(u"DBusException: %s", error)
753
killme(1)
754
# End of Avahi example code
755
756
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
757
lambda *args, **kwargs:
758
tcp_server.handle_request(*args[2:],
759
**kwargs) or True)
760
try:
761
logger.debug("Starting main loop")
844
762
main_loop_started = True
845
763
main_loop.run()
846
except AvahiError, error:
847
logger.critical(u"AvahiError: %s" + unicode(error))
848
sys.exit(1)
849
764
except KeyboardInterrupt:
850
765
if debug:
851
766
print
767
768
sys.exit(exitstatus)
852
769
853
770
if __name__ == '__main__':
854
771
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0