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- Committer: Björn Påhlsson
- Date: 2008-08-02 14:48:45 UTC
- mto: (24.1.154 mandos) (237.4.3 mandos-release)
- mto: This revision was merged to the branch mainline in revision 38.
- Revision ID: belorn@braxen-20080802144845-sd6z98g9poztxffs
plugbasedclient
change uid to nobody:nogroup as default for all plugins
mandosclient
Takes up the interface if needed
change uid to nobody:nogroup as default for all plugins
mandosclient
Takes up the interface if needed
- files added:
- ca.pem
- files removed:
- .bzrignore
- 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
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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15
#
16
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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
24
24
# GNU General Public License for more details.
25
25
#
26
26
# You should have received a copy of the GNU General Public License
27
# along with this program. If not, see
28
# <http://www.gnu.org/licenses/>.
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
29
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#
30
# 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/>.
31
31
#
32
32
33
33
from __future__ import division
62
62
from dbus.mainloop.glib import DBusGMainLoop
63
63
import ctypes
64
64
65
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
72
# 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.
75
66
76
67
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logger = logging.Logger('mandos')
68
78
syslogger = logging.handlers.SysLogHandler\
69
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
70
address = "/dev/log")
79
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
71
80
syslogger.setFormatter(logging.Formatter\
72
('Mandos: %(levelname)s: %(message)s'))
81
('%(levelname)s: %(message)s'))
73
82
logger.addHandler(syslogger)
74
75
console = logging.StreamHandler()
76
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
77
' %(message)s'))
78
logger.addHandler(console)
79
80
class AvahiError(Exception):
81
def __init__(self, value):
82
self.value = value
83
def __str__(self):
84
return repr(self.value)
85
86
class AvahiServiceError(AvahiError):
87
pass
88
89
class AvahiGroupError(AvahiError):
90
pass
91
92
93
class AvahiService(object):
94
"""An Avahi (Zeroconf) service.
95
Attributes:
96
interface: integer; avahi.IF_UNSPEC or an interface index.
97
Used to optionally bind to the specified interface.
98
name: string; Example: 'Mandos'
99
type: string; Example: '_mandos._tcp'.
100
See <http://www.dns-sd.org/ServiceTypes.html>
101
port: integer; what port to announce
102
TXT: list of strings; TXT record for the service
103
domain: string; Domain to publish on, default to .local if empty.
104
host: string; Host to publish records for, default is localhost
105
max_renames: integer; maximum number of renames
106
rename_count: integer; counter so we only rename after collisions
107
a sensible number of times
108
"""
109
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
110
type = None, port = None, TXT = None, domain = "",
111
host = "", max_renames = 32768):
112
self.interface = interface
113
self.name = name
114
self.type = type
115
self.port = port
116
if TXT is None:
117
self.TXT = []
118
else:
119
self.TXT = TXT
120
self.domain = domain
121
self.host = host
122
self.rename_count = 0
123
self.max_renames = max_renames
124
def rename(self):
125
"""Derived from the Avahi example code"""
126
if self.rename_count >= self.max_renames:
127
logger.critical(u"No suitable Zeroconf service name found"
128
u" after %i retries, exiting.",
129
rename_count)
130
raise AvahiServiceError("Too many renames")
131
self.name = server.GetAlternativeServiceName(self.name)
132
logger.info(u"Changing Zeroconf service name to %r ...",
133
str(self.name))
134
syslogger.setFormatter(logging.Formatter\
135
('Mandos (%s): %%(levelname)s:'
136
' %%(message)s' % self.name))
137
self.remove()
138
self.add()
139
self.rename_count += 1
140
def remove(self):
141
"""Derived from the Avahi example code"""
142
if group is not None:
143
group.Reset()
144
def add(self):
145
"""Derived from the Avahi example code"""
146
global group
147
if group is None:
148
group = dbus.Interface\
149
(bus.get_object(avahi.DBUS_NAME,
150
server.EntryGroupNew()),
151
avahi.DBUS_INTERFACE_ENTRY_GROUP)
152
group.connect_to_signal('StateChanged',
153
entry_group_state_changed)
154
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
155
service.name, service.type)
156
group.AddService(
157
self.interface, # interface
158
avahi.PROTO_INET6, # protocol
159
dbus.UInt32(0), # flags
160
self.name, self.type,
161
self.domain, self.host,
162
dbus.UInt16(self.port),
163
avahi.string_array_to_txt_array(self.TXT))
164
group.Commit()
165
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
166
89
# From the Avahi example code:
167
group = None # our entry group
90
serviceName = None
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
168
99
# End of Avahi example code
169
100
170
101
175
106
fingerprint: string (40 or 32 hexadecimal digits); used to
176
107
uniquely identify the client
177
108
secret: bytestring; sent verbatim (over TLS) to client
178
host: string; available for use by the checker command
179
created: datetime.datetime(); object creation, not client host
180
last_checked_ok: datetime.datetime() or None if not yet checked OK
181
timeout: datetime.timedelta(); How long from last_checked_ok
182
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
183
114
interval: datetime.timedelta(); How often to start a new checker
184
115
stop_hook: If set, called by stop() as stop_hook(self)
185
116
checker: subprocess.Popen(); a running checker process used
186
117
to see if the client lives.
187
'None' if no process is running.
118
Is None if no process is running.
188
119
checker_initiator_tag: a gobject event source tag, or None
189
120
stop_initiator_tag: - '' -
190
121
checker_callback_tag: - '' -
191
122
checker_command: string; External command which is run to check if
192
client lives. %() expansions are done at
123
client lives. %()s expansions are done at
193
124
runtime with vars(self) as dict, so that for
194
125
instance %(name)s can be used in the command.
195
126
Private attibutes:
196
127
_timeout: Real variable for 'timeout'
197
128
_interval: Real variable for 'interval'
198
_timeout_milliseconds: Used when calling gobject.timeout_add()
129
_timeout_milliseconds: Used by gobject.timeout_add()
199
130
_interval_milliseconds: - '' -
200
131
"""
201
132
def _set_timeout(self, timeout):
221
152
interval = property(lambda self: self._interval,
222
153
_set_interval)
223
154
del _set_interval
224
def __init__(self, name = None, stop_hook=None, config={}):
225
"""Note: the 'checker' key in 'config' sets the
226
'checker_command' attribute and *not* the 'checker'
227
attribute."""
155
def __init__(self, name=None, stop_hook=None, fingerprint=None,
156
secret=None, secfile=None, fqdn=None, timeout=None,
157
interval=-1, checker=None):
158
"""Note: the 'checker' argument sets the 'checker_command'
159
attribute and not the 'checker' attribute.."""
228
160
self.name = name
229
161
logger.debug(u"Creating client %r", self.name)
230
# Uppercase and remove spaces from fingerprint for later
231
# comparison purposes with return value from the fingerprint()
232
# function
233
self.fingerprint = config["fingerprint"].upper()\
234
.replace(u" ", u"")
162
# Uppercase and remove spaces from fingerprint
163
# for later comparison purposes with return value of
164
# the fingerprint() function
165
self.fingerprint = fingerprint.upper().replace(u" ", u"")
235
166
logger.debug(u" Fingerprint: %s", self.fingerprint)
236
if "secret" in config:
237
self.secret = config["secret"].decode(u"base64")
238
elif "secfile" in config:
239
sf = open(config["secfile"])
167
if secret:
168
self.secret = secret.decode(u"base64")
169
elif secfile:
170
sf = open(secfile)
240
171
self.secret = sf.read()
241
172
sf.close()
242
173
else:
243
raise TypeError(u"No secret or secfile for client %s"
244
% self.name)
245
self.host = config.get("host", "")
174
raise RuntimeError(u"No secret or secfile for client %s"
175
% self.name)
176
self.fqdn = fqdn # string
246
177
self.created = datetime.datetime.now()
247
self.last_checked_ok = None
248
self.timeout = string_to_delta(config["timeout"])
249
self.interval = string_to_delta(config["interval"])
178
self.last_seen = None
179
self.timeout = string_to_delta(timeout)
180
self.interval = string_to_delta(interval)
250
181
self.stop_hook = stop_hook
251
182
self.checker = None
252
183
self.checker_initiator_tag = None
253
184
self.stop_initiator_tag = None
254
185
self.checker_callback_tag = None
255
self.check_command = config["checker"]
186
self.check_command = checker
256
187
def start(self):
257
188
"""Start this client's checker and timeout hooks"""
258
189
# Schedule a new checker to be started an 'interval' from now,
268
199
self.stop)
269
200
def stop(self):
270
201
"""Stop this client.
271
The possibility that a client might be restarted is left open,
272
but not currently used."""
202
The possibility that this client might be restarted is left
203
open, but not currently used."""
273
204
# If this client doesn't have a secret, it is already stopped.
274
if hasattr(self, "secret") and self.secret:
275
logger.info(u"Stopping client %s", self.name)
205
if self.secret:
206
logger.debug(u"Stopping client %s", self.name)
276
207
self.secret = None
277
208
else:
278
209
return False
279
if getattr(self, "stop_initiator_tag", False):
210
if hasattr(self, "stop_initiator_tag") \
211
and self.stop_initiator_tag:
280
212
gobject.source_remove(self.stop_initiator_tag)
281
213
self.stop_initiator_tag = None
282
if getattr(self, "checker_initiator_tag", False):
214
if hasattr(self, "checker_initiator_tag") \
215
and self.checker_initiator_tag:
283
216
gobject.source_remove(self.checker_initiator_tag)
284
217
self.checker_initiator_tag = None
285
218
self.stop_checker()
297
230
self.checker = None
298
231
if os.WIFEXITED(condition) \
299
232
and (os.WEXITSTATUS(condition) == 0):
300
logger.info(u"Checker for %(name)s succeeded",
301
vars(self))
302
self.last_checked_ok = now
233
logger.debug(u"Checker for %(name)s succeeded",
234
vars(self))
235
self.last_seen = now
303
236
gobject.source_remove(self.stop_initiator_tag)
304
237
self.stop_initiator_tag = gobject.timeout_add\
305
238
(self._timeout_milliseconds,
308
241
logger.warning(u"Checker for %(name)s crashed?",
309
242
vars(self))
310
243
else:
311
logger.info(u"Checker for %(name)s failed",
312
vars(self))
244
logger.debug(u"Checker for %(name)s failed",
245
vars(self))
313
246
def start_checker(self):
314
247
"""Start a new checker subprocess if one is not running.
315
248
If a checker already exists, leave it running and do
324
257
# is as it should be.
325
258
if self.checker is None:
326
259
try:
327
# In case check_command has exactly one % operator
328
command = self.check_command % self.host
260
command = self.check_command % self.fqdn
329
261
except TypeError:
330
# Escape attributes for the shell
331
262
escaped_attrs = dict((key, re.escape(str(val)))
332
263
for key, val in
333
264
vars(self).iteritems())
334
265
try:
335
266
command = self.check_command % escaped_attrs
336
267
except TypeError, error:
337
logger.error(u'Could not format string "%s":'
338
u' %s', self.check_command, error)
268
logger.critical(u'Could not format string "%s":'
269
u' %s', self.check_command, error)
339
270
return True # Try again later
340
271
try:
341
logger.info(u"Starting checker %r for %s",
342
command, self.name)
343
# We don't need to redirect stdout and stderr, since
344
# in normal mode, that is already done by daemon(),
345
# and in debug mode we don't want to. (Stdin is
346
# always replaced by /dev/null.)
347
self.checker = subprocess.Popen(command,
348
close_fds=True,
349
shell=True, cwd="/")
272
logger.debug(u"Starting checker %r for %s",
273
command, self.name)
274
self.checker = subprocess.\
275
Popen(command,
276
close_fds=True, shell=True,
277
cwd="/")
350
278
self.checker_callback_tag = gobject.child_watch_add\
351
279
(self.checker.pid,
352
280
self.checker_callback)
353
except OSError, error:
281
except subprocess.OSError, error:
354
282
logger.error(u"Failed to start subprocess: %s",
355
283
error)
356
284
# Re-run this periodically if run by gobject.timeout_add
360
288
if self.checker_callback_tag:
361
289
gobject.source_remove(self.checker_callback_tag)
362
290
self.checker_callback_tag = None
363
if getattr(self, "checker", None) is None:
291
if not hasattr(self, "checker") or self.checker is None:
364
292
return
365
logger.debug(u"Stopping checker for %(name)s", vars(self))
293
logger.debug("Stopping checker for %(name)s", vars(self))
366
294
try:
367
295
os.kill(self.checker.pid, signal.SIGTERM)
368
296
#os.sleep(0.5)
369
297
#if self.checker.poll() is None:
370
298
# os.kill(self.checker.pid, signal.SIGKILL)
371
299
except OSError, error:
372
if error.errno != errno.ESRCH: # No such process
300
if error.errno != errno.ESRCH:
373
301
raise
374
302
self.checker = None
375
def still_valid(self):
303
def still_valid(self, now=None):
376
304
"""Has the timeout not yet passed for this client?"""
377
now = datetime.datetime.now()
378
if self.last_checked_ok is None:
305
if now is None:
306
now = datetime.datetime.now()
307
if self.last_seen is None:
379
308
return now < (self.created + self.timeout)
380
309
else:
381
return now < (self.last_checked_ok + self.timeout)
310
return now < (self.last_seen + self.timeout)
382
311
383
312
384
313
def peer_certificate(session):
400
329
401
330
def fingerprint(openpgp):
402
331
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
332
# New empty GnuTLS certificate
333
crt = gnutls.library.types.gnutls_openpgp_crt_t()
334
gnutls.library.functions.gnutls_openpgp_crt_init\
335
(ctypes.byref(crt))
403
336
# New GnuTLS "datum" with the OpenPGP public key
404
337
datum = gnutls.library.types.gnutls_datum_t\
405
338
(ctypes.cast(ctypes.c_char_p(openpgp),
406
339
ctypes.POINTER(ctypes.c_ubyte)),
407
340
ctypes.c_uint(len(openpgp)))
408
# New empty GnuTLS certificate
409
crt = gnutls.library.types.gnutls_openpgp_crt_t()
410
gnutls.library.functions.gnutls_openpgp_crt_init\
411
(ctypes.byref(crt))
412
341
# Import the OpenPGP public key into the certificate
413
gnutls.library.functions.gnutls_openpgp_crt_import\
414
(crt, ctypes.byref(datum),
415
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
416
# Verify the self signature in the key
417
crtverify = ctypes.c_uint();
418
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
419
(crt, 0, ctypes.byref(crtverify))
420
if crtverify.value != 0:
421
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
422
raise gnutls.errors.CertificateSecurityError("Verify failed")
342
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
343
(crt,
344
ctypes.byref(datum),
345
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
423
346
# New buffer for the fingerprint
424
347
buffer = ctypes.create_string_buffer(20)
425
348
buffer_length = ctypes.c_size_t()
441
364
Note: This will run in its own forked process."""
442
365
443
366
def handle(self):
444
logger.info(u"TCP connection from: %s",
367
logger.debug(u"TCP connection from: %s",
445
368
unicode(self.client_address))
446
session = gnutls.connection.ClientSession\
447
(self.request, gnutls.connection.X509Credentials())
448
449
line = self.request.makefile().readline()
450
logger.debug(u"Protocol version: %r", line)
451
try:
452
if int(line.strip().split()[0]) > 1:
453
raise RuntimeError
454
except (ValueError, IndexError, RuntimeError), error:
455
logger.error(u"Unknown protocol version: %s", error)
456
return
457
458
# Note: gnutls.connection.X509Credentials is really a generic
459
# GnuTLS certificate credentials object so long as no X.509
460
# keys are added to it. Therefore, we can use it here despite
461
# using OpenPGP certificates.
369
session = gnutls.connection.ClientSession(self.request,
370
gnutls.connection.\
371
X509Credentials())
462
372
463
373
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
464
374
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
465
375
# "+DHE-DSS"))
466
priority = "NORMAL" # Fallback default, since this
467
# MUST be set.
468
if self.server.settings["priority"]:
469
priority = self.server.settings["priority"]
376
priority = "NORMAL"
377
if self.server.options.priority:
378
priority = self.server.options.priority
470
379
gnutls.library.functions.gnutls_priority_set_direct\
471
380
(session._c_object, priority, None);
472
381
473
382
try:
474
383
session.handshake()
475
384
except gnutls.errors.GNUTLSError, error:
476
logger.warning(u"Handshake failed: %s", error)
385
logger.debug(u"Handshake failed: %s", error)
477
386
# Do not run session.bye() here: the session is not
478
387
# established. Just abandon the request.
479
388
return
480
389
try:
481
390
fpr = fingerprint(peer_certificate(session))
482
391
except (TypeError, gnutls.errors.GNUTLSError), error:
483
logger.warning(u"Bad certificate: %s", error)
392
logger.debug(u"Bad certificate: %s", error)
484
393
session.bye()
485
394
return
486
395
logger.debug(u"Fingerprint: %s", fpr)
489
398
if c.fingerprint == fpr:
490
399
client = c
491
400
break
492
if not client:
493
logger.warning(u"Client not found for fingerprint: %s",
494
fpr)
495
session.bye()
496
return
497
401
# Have to check if client.still_valid(), since it is possible
498
402
# that the client timed out while establishing the GnuTLS
499
403
# session.
500
if not client.still_valid():
501
logger.warning(u"Client %(name)s is invalid",
502
vars(client))
404
if (not client) or (not client.still_valid()):
405
if client:
406
logger.debug(u"Client %(name)s is invalid",
407
vars(client))
408
else:
409
logger.debug(u"Client not found for fingerprint: %s",
410
fpr)
503
411
session.bye()
504
412
return
505
413
sent_size = 0
515
423
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
516
424
"""IPv6 TCP server. Accepts 'None' as address and/or port.
517
425
Attributes:
518
settings: Server settings
426
options: Command line options
519
427
clients: Set() of Client objects
520
428
"""
521
429
address_family = socket.AF_INET6
522
430
def __init__(self, *args, **kwargs):
523
if "settings" in kwargs:
524
self.settings = kwargs["settings"]
525
del kwargs["settings"]
431
if "options" in kwargs:
432
self.options = kwargs["options"]
433
del kwargs["options"]
526
434
if "clients" in kwargs:
527
435
self.clients = kwargs["clients"]
528
436
del kwargs["clients"]
531
439
"""This overrides the normal server_bind() function
532
440
to bind to an interface if one was specified, and also NOT to
533
441
bind to an address or port if they were not specified."""
534
if self.settings["interface"]:
535
# 25 is from /usr/include/asm-i486/socket.h
536
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
442
if self.options.interface:
443
if not hasattr(socket, "SO_BINDTODEVICE"):
444
# From /usr/include/asm-i486/socket.h
445
socket.SO_BINDTODEVICE = 25
537
446
try:
538
447
self.socket.setsockopt(socket.SOL_SOCKET,
539
SO_BINDTODEVICE,
540
self.settings["interface"])
448
socket.SO_BINDTODEVICE,
449
self.options.interface)
541
450
except socket.error, error:
542
451
if error[0] == errno.EPERM:
543
logger.error(u"No permission to"
544
u" bind to interface %s",
545
self.settings["interface"])
452
logger.warning(u"No permission to"
453
u" bind to interface %s",
454
self.options.interface)
546
455
else:
547
456
raise error
548
457
# Only bind(2) the socket if we really need to.
551
460
in6addr_any = "::"
552
461
self.server_address = (in6addr_any,
553
462
self.server_address[1])
554
elif not self.server_address[1]:
463
elif self.server_address[1] is None:
555
464
self.server_address = (self.server_address[0],
556
465
0)
557
# if self.settings["interface"]:
558
# self.server_address = (self.server_address[0],
559
# 0, # port
560
# 0, # flowinfo
561
# if_nametoindex
562
# (self.settings
563
# ["interface"]))
564
466
return super(type(self), self).server_bind()
565
467
566
468
577
479
datetime.timedelta(1)
578
480
>>> string_to_delta(u'1w')
579
481
datetime.timedelta(7)
580
>>> string_to_delta('5m 30s')
581
datetime.timedelta(0, 330)
582
482
"""
583
timevalue = datetime.timedelta(0)
584
for s in interval.split():
585
try:
586
suffix=unicode(s[-1])
587
value=int(s[:-1])
588
if suffix == u"d":
589
delta = datetime.timedelta(value)
590
elif suffix == u"s":
591
delta = datetime.timedelta(0, value)
592
elif suffix == u"m":
593
delta = datetime.timedelta(0, 0, 0, 0, value)
594
elif suffix == u"h":
595
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
596
elif suffix == u"w":
597
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
598
else:
599
raise ValueError
600
except (ValueError, IndexError):
483
try:
484
suffix=unicode(interval[-1])
485
value=int(interval[:-1])
486
if suffix == u"d":
487
delta = datetime.timedelta(value)
488
elif suffix == u"s":
489
delta = datetime.timedelta(0, value)
490
elif suffix == u"m":
491
delta = datetime.timedelta(0, 0, 0, 0, value)
492
elif suffix == u"h":
493
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
494
elif suffix == u"w":
495
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
496
else:
601
497
raise ValueError
602
timevalue += delta
603
return timevalue
498
except (ValueError, IndexError):
499
raise ValueError
500
return delta
501
502
503
def add_service():
504
"""Derived from the Avahi example code"""
505
global group, serviceName, serviceType, servicePort, serviceTXT, \
506
domain, host
507
if group is None:
508
group = dbus.Interface(
509
bus.get_object( avahi.DBUS_NAME,
510
server.EntryGroupNew()),
511
avahi.DBUS_INTERFACE_ENTRY_GROUP)
512
group.connect_to_signal('StateChanged',
513
entry_group_state_changed)
514
logger.debug(u"Adding service '%s' of type '%s' ...",
515
serviceName, serviceType)
516
517
group.AddService(
518
serviceInterface, # interface
519
avahi.PROTO_INET6, # protocol
520
dbus.UInt32(0), # flags
521
serviceName, serviceType,
522
domain, host,
523
dbus.UInt16(servicePort),
524
avahi.string_array_to_txt_array(serviceTXT))
525
group.Commit()
526
527
528
def remove_service():
529
"""From the Avahi example code"""
530
global group
531
532
if not group is None:
533
group.Reset()
604
534
605
535
606
536
def server_state_changed(state):
607
537
"""Derived from the Avahi example code"""
608
538
if state == avahi.SERVER_COLLISION:
609
logger.error(u"Zeroconf server name collision")
610
service.remove()
539
logger.warning(u"Server name collision")
540
remove_service()
611
541
elif state == avahi.SERVER_RUNNING:
612
service.add()
542
add_service()
613
543
614
544
615
545
def entry_group_state_changed(state, error):
616
546
"""Derived from the Avahi example code"""
617
logger.debug(u"Avahi state change: %i", state)
547
global serviceName, server, rename_count
548
549
logger.debug(u"state change: %i", state)
618
550
619
551
if state == avahi.ENTRY_GROUP_ESTABLISHED:
620
logger.debug(u"Zeroconf service established.")
552
logger.debug(u"Service established.")
621
553
elif state == avahi.ENTRY_GROUP_COLLISION:
622
logger.warning(u"Zeroconf service name collision.")
623
service.rename()
554
555
rename_count = rename_count - 1
556
if rename_count > 0:
557
name = server.GetAlternativeServiceName(name)
558
logger.warning(u"Service name collision, "
559
u"changing name to '%s' ...", name)
560
remove_service()
561
add_service()
562
563
else:
564
logger.error(u"No suitable service name found after %i"
565
u" retries, exiting.", n_rename)
566
killme(1)
624
567
elif state == avahi.ENTRY_GROUP_FAILURE:
625
logger.critical(u"Avahi: Error in group state changed %s",
626
unicode(error))
627
raise AvahiGroupError("State changed: %s", str(error))
568
logger.error(u"Error in group state changed %s",
569
unicode(error))
570
killme(1)
571
628
572
629
573
def if_nametoindex(interface):
630
"""Call the C function if_nametoindex(), or equivalent"""
631
global if_nametoindex
574
"""Call the C function if_nametoindex()"""
632
575
try:
633
if "ctypes.util" not in sys.modules:
634
import ctypes.util
635
if_nametoindex = ctypes.cdll.LoadLibrary\
636
(ctypes.util.find_library("c")).if_nametoindex
576
libc = ctypes.cdll.LoadLibrary("libc.so.6")
577
return libc.if_nametoindex(interface)
637
578
except (OSError, AttributeError):
638
579
if "struct" not in sys.modules:
639
580
import struct
640
581
if "fcntl" not in sys.modules:
641
582
import fcntl
642
def if_nametoindex(interface):
643
"Get an interface index the hard way, i.e. using fcntl()"
644
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
645
s = socket.socket()
646
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
647
struct.pack("16s16x", interface))
648
s.close()
649
interface_index = struct.unpack("I", ifreq[16:20])[0]
650
return interface_index
651
return if_nametoindex(interface)
652
653
654
def daemon(nochdir = False, noclose = False):
583
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
584
s = socket.socket()
585
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
586
struct.pack("16s16x", interface))
587
s.close()
588
interface_index = struct.unpack("I", ifreq[16:20])[0]
589
return interface_index
590
591
592
def daemon(nochdir, noclose):
655
593
"""See daemon(3). Standard BSD Unix function.
656
594
This should really exist as os.daemon, but it doesn't (yet)."""
657
595
if os.fork():
659
597
os.setsid()
660
598
if not nochdir:
661
599
os.chdir("/")
662
if os.fork():
663
sys.exit()
664
600
if not noclose:
665
601
# Close all standard open file descriptors
666
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
602
null = os.open("/dev/null", os.O_NOCTTY | os.O_RDWR)
667
603
if not stat.S_ISCHR(os.fstat(null).st_mode):
668
604
raise OSError(errno.ENODEV,
669
605
"/dev/null not a character device")
674
610
os.close(null)
675
611
676
612
613
def killme(status = 0):
614
logger.debug("Stopping server with exit status %d", status)
615
exitstatus = status
616
if main_loop_started:
617
main_loop.quit()
618
else:
619
sys.exit(status)
620
621
677
622
def main():
623
global exitstatus
624
exitstatus = 0
678
625
global main_loop_started
679
626
main_loop_started = False
680
627
681
parser = OptionParser(version = "%%prog %s" % version)
628
parser = OptionParser()
682
629
parser.add_option("-i", "--interface", type="string",
683
metavar="IF", help="Bind to interface IF")
684
parser.add_option("-a", "--address", type="string",
630
default=None, metavar="IF",
631
help="Bind to interface IF")
632
parser.add_option("-a", "--address", type="string", default=None,
685
633
help="Address to listen for requests on")
686
parser.add_option("-p", "--port", type="int",
634
parser.add_option("-p", "--port", type="int", default=None,
687
635
help="Port number to receive requests on")
688
636
parser.add_option("--check", action="store_true", default=False,
689
637
help="Run self-test")
690
parser.add_option("--debug", action="store_true",
691
help="Debug mode; run in foreground and log to"
692
" terminal")
693
parser.add_option("--priority", type="string", help="GnuTLS"
694
" priority string (see GnuTLS documentation)")
695
parser.add_option("--servicename", type="string", metavar="NAME",
696
help="Zeroconf service name")
697
parser.add_option("--configdir", type="string",
698
default="/etc/mandos", metavar="DIR",
699
help="Directory to search for configuration"
700
" files")
638
parser.add_option("--debug", action="store_true", default=False,
639
help="Debug mode")
640
parser.add_option("--priority", type="string",
641
default="SECURE256",
642
help="GnuTLS priority string"
643
" (see GnuTLS documentation)")
644
parser.add_option("--servicename", type="string",
645
default="Mandos", help="Zeroconf service name")
701
646
(options, args) = parser.parse_args()
702
647
703
648
if options.check:
705
650
doctest.testmod()
706
651
sys.exit()
707
652
708
# Default values for config file for server-global settings
709
server_defaults = { "interface": "",
710
"address": "",
711
"port": "",
712
"debug": "False",
713
"priority":
714
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
715
"servicename": "Mandos",
716
}
717
718
# Parse config file for server-global settings
719
server_config = ConfigParser.SafeConfigParser(server_defaults)
720
del server_defaults
721
server_config.read(os.path.join(options.configdir, "mandos.conf"))
722
# Convert the SafeConfigParser object to a dict
723
server_settings = server_config.defaults()
724
# Use getboolean on the boolean config option
725
server_settings["debug"] = server_config.getboolean\
726
("DEFAULT", "debug")
727
del server_config
728
729
# Override the settings from the config file with command line
730
# options, if set.
731
for option in ("interface", "address", "port", "debug",
732
"priority", "servicename", "configdir"):
733
value = getattr(options, option)
734
if value is not None:
735
server_settings[option] = value
736
del options
737
# Now we have our good server settings in "server_settings"
738
739
debug = server_settings["debug"]
740
741
if not debug:
742
syslogger.setLevel(logging.WARNING)
743
console.setLevel(logging.WARNING)
744
745
if server_settings["servicename"] != "Mandos":
746
syslogger.setFormatter(logging.Formatter\
747
('Mandos (%s): %%(levelname)s:'
748
' %%(message)s'
749
% server_settings["servicename"]))
750
751
# Parse config file with clients
752
client_defaults = { "timeout": "1h",
753
"interval": "5m",
754
"checker": "fping -q -- %(host)s",
755
"host": "",
756
}
757
client_config = ConfigParser.SafeConfigParser(client_defaults)
758
client_config.read(os.path.join(server_settings["configdir"],
759
"clients.conf"))
760
761
global service
762
service = AvahiService(name = server_settings["servicename"],
763
type = "_mandos._tcp", );
764
if server_settings["interface"]:
765
service.interface = if_nametoindex\
766
(server_settings["interface"])
653
# Parse config file
654
defaults = { "timeout": "1h",
655
"interval": "5m",
656
"checker": "fping -q -- %%(fqdn)s",
657
}
658
client_config = ConfigParser.SafeConfigParser(defaults)
659
#client_config.readfp(open("global.conf"), "global.conf")
660
client_config.read("mandos-clients.conf")
661
662
global serviceName
663
serviceName = options.servicename;
767
664
768
665
global main_loop
769
666
global bus
772
669
DBusGMainLoop(set_as_default=True )
773
670
main_loop = gobject.MainLoop()
774
671
bus = dbus.SystemBus()
775
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
776
avahi.DBUS_PATH_SERVER),
777
avahi.DBUS_INTERFACE_SERVER)
672
server = dbus.Interface(
673
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
674
avahi.DBUS_INTERFACE_SERVER )
778
675
# End of Avahi example code
779
676
677
debug = options.debug
678
679
if debug:
680
console = logging.StreamHandler()
681
# console.setLevel(logging.DEBUG)
682
console.setFormatter(logging.Formatter\
683
('%(levelname)s: %(message)s'))
684
logger.addHandler(console)
685
del console
686
780
687
clients = Set()
781
688
def remove_from_clients(client):
782
689
clients.remove(client)
783
690
if not clients:
784
logger.critical(u"No clients left, exiting")
785
sys.exit()
691
logger.debug(u"No clients left, exiting")
692
killme()
786
693
787
clients.update(Set(Client(name = section,
694
clients.update(Set(Client(name=section,
788
695
stop_hook = remove_from_clients,
789
config
790
= dict(client_config.items(section)))
696
**(dict(client_config\
697
.items(section))))
791
698
for section in client_config.sections()))
792
if not clients:
793
logger.critical(u"No clients defined")
794
sys.exit(1)
795
796
if debug:
797
# Redirect stdin so all checkers get /dev/null
798
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
799
os.dup2(null, sys.stdin.fileno())
800
if null > 2:
801
os.close(null)
802
else:
803
# No console logging
804
logger.removeHandler(console)
805
# Close all input and output, do double fork, etc.
806
daemon()
807
808
pidfilename = "/var/run/mandos/mandos.pid"
809
pid = os.getpid()
810
try:
811
pidfile = open(pidfilename, "w")
812
pidfile.write(str(pid) + "\n")
813
pidfile.close()
814
del pidfile
815
except IOError, err:
816
logger.error(u"Could not write %s file with PID %d",
817
pidfilename, os.getpid())
699
700
if not debug:
701
daemon(False, False)
818
702
819
703
def cleanup():
820
704
"Cleanup function; run on exit"
834
718
835
719
if not debug:
836
720
signal.signal(signal.SIGINT, signal.SIG_IGN)
837
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
838
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
721
signal.signal(signal.SIGHUP, lambda signum, frame: killme())
722
signal.signal(signal.SIGTERM, lambda signum, frame: killme())
839
723
840
724
for client in clients:
841
725
client.start()
842
726
843
tcp_server = IPv6_TCPServer((server_settings["address"],
844
server_settings["port"]),
727
tcp_server = IPv6_TCPServer((options.address, options.port),
845
728
tcp_handler,
846
settings=server_settings,
729
options=options,
847
730
clients=clients)
848
# Find out what port we got
849
service.port = tcp_server.socket.getsockname()[1]
850
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
851
u" scope_id %d" % tcp_server.socket.getsockname())
852
853
#service.interface = tcp_server.socket.getsockname()[3]
854
855
try:
856
# From the Avahi example code
857
server.connect_to_signal("StateChanged", server_state_changed)
858
try:
859
server_state_changed(server.GetState())
860
except dbus.exceptions.DBusException, error:
861
logger.critical(u"DBusException: %s", error)
862
sys.exit(1)
863
# End of Avahi example code
864
865
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
866
lambda *args, **kwargs:
867
tcp_server.handle_request\
868
(*args[2:], **kwargs) or True)
869
870
logger.debug(u"Starting main loop")
731
# Find out what random port we got
732
global servicePort
733
servicePort = tcp_server.socket.getsockname()[1]
734
logger.debug(u"Now listening on port %d", servicePort)
735
736
if options.interface is not None:
737
global serviceInterface
738
serviceInterface = if_nametoindex(options.interface)
739
740
# From the Avahi example code
741
server.connect_to_signal("StateChanged", server_state_changed)
742
try:
743
server_state_changed(server.GetState())
744
except dbus.exceptions.DBusException, error:
745
logger.critical(u"DBusException: %s", error)
746
killme(1)
747
# End of Avahi example code
748
749
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
750
lambda *args, **kwargs:
751
tcp_server.handle_request(*args[2:],
752
**kwargs) or True)
753
try:
754
logger.debug("Starting main loop")
871
755
main_loop_started = True
872
756
main_loop.run()
873
except AvahiError, error:
874
logger.critical(u"AvahiError: %s" + unicode(error))
875
sys.exit(1)
876
757
except KeyboardInterrupt:
877
758
if debug:
878
759
print
760
761
sys.exit(exitstatus)
879
762
880
763
if __name__ == '__main__':
881
764
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0