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- Committer: Björn Påhlsson
- Date: 2008-09-19 20:29:20 UTC
- mfrom: (196 mandos)
- mto: (237.7.1 mandos) (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 203.
- Revision ID: belorn@braxen-20080919202920-6pp4neq3d1jh2csb
merge
- files added:
- .bzr-builddeb
- debian
- files removed:
- ca.pem
- files renamed:
- mandos-clients.conf => clients.conf
- server.py => mandos
- plugbasedclient.c => plugin-runner.c
- plugins.d/mandosclient.c => plugins.d/mandos-client.c
- plugins.d/passprompt.c => plugins.d/password-prompt.c
- files modified:
- Makefile
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
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# <http://avahi.org/wiki/PythonPublishExample>. This includes the
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# following functions: "add_service", "remove_service",
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# "server_state_changed", "entry_group_state_changed", and some lines
11
# in "main".
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# methods "add" and "remove" in the "AvahiService" class, the
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# "server_state_changed" and "entry_group_state_changed" functions,
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# and some lines in "main".
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#
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# Everything else is Copyright © 2007-2008 Teddy Hogeborn and Björn
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# Påhlsson.
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# Everything else is
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# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
24
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
27
# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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#
29
# Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
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# <https://www.fukt.bsnet.se/~teddy/>.
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# Contact the authors at <mandos@fukt.bsnet.se>.
31
31
#
32
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from __future__ import division
55
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import stat
56
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import logging
57
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import logging.handlers
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import pwd
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import dbus
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import gobject
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from dbus.mainloop.glib import DBusGMainLoop
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import ctypes
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# 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
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# acts as a TLS "server". The clients (acting as a TLS "server") must
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# 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
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# file at start time) which binary blob to give the client. No other
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# authentication or authorization is done by this server.
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version = "1.0"
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logger = logging.Logger('mandos')
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69
syslogger = logging.handlers.SysLogHandler\
79
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log")
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syslogger.setFormatter(logging.Formatter\
81
('%(levelname)s: %(message)s'))
73
('Mandos: %(levelname)s: %(message)s'))
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logger.addHandler(syslogger)
83
del syslogger
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# 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
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console = logging.StreamHandler()
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
78
' %(message)s'))
79
logger.addHandler(console)
80
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class AvahiError(Exception):
82
def __init__(self, value):
83
self.value = value
84
def __str__(self):
85
return repr(self.value)
86
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class AvahiServiceError(AvahiError):
88
pass
89
90
class AvahiGroupError(AvahiError):
91
pass
92
93
94
class AvahiService(object):
95
"""An Avahi (Zeroconf) service.
96
Attributes:
97
interface: integer; avahi.IF_UNSPEC or an interface index.
98
Used to optionally bind to the specified interface.
99
name: string; Example: 'Mandos'
100
type: string; Example: '_mandos._tcp'.
101
See <http://www.dns-sd.org/ServiceTypes.html>
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port: integer; what port to announce
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TXT: list of strings; TXT record for the service
104
domain: string; Domain to publish on, default to .local if empty.
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host: string; Host to publish records for, default is localhost
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max_renames: integer; maximum number of renames
107
rename_count: integer; counter so we only rename after collisions
108
a sensible number of times
109
"""
110
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
111
type = None, port = None, TXT = None, domain = "",
112
host = "", max_renames = 32768):
113
self.interface = interface
114
self.name = name
115
self.type = type
116
self.port = port
117
if TXT is None:
118
self.TXT = []
119
else:
120
self.TXT = TXT
121
self.domain = domain
122
self.host = host
123
self.rename_count = 0
124
self.max_renames = max_renames
125
def rename(self):
126
"""Derived from the Avahi example code"""
127
if self.rename_count >= self.max_renames:
128
logger.critical(u"No suitable Zeroconf service name found"
129
u" after %i retries, exiting.",
130
rename_count)
131
raise AvahiServiceError("Too many renames")
132
self.name = server.GetAlternativeServiceName(self.name)
133
logger.info(u"Changing Zeroconf service name to %r ...",
134
str(self.name))
135
syslogger.setFormatter(logging.Formatter\
136
('Mandos (%s): %%(levelname)s:'
137
' %%(message)s' % self.name))
138
self.remove()
139
self.add()
140
self.rename_count += 1
141
def remove(self):
142
"""Derived from the Avahi example code"""
143
if group is not None:
144
group.Reset()
145
def add(self):
146
"""Derived from the Avahi example code"""
147
global group
148
if group is None:
149
group = dbus.Interface\
150
(bus.get_object(avahi.DBUS_NAME,
151
server.EntryGroupNew()),
152
avahi.DBUS_INTERFACE_ENTRY_GROUP)
153
group.connect_to_signal('StateChanged',
154
entry_group_state_changed)
155
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
156
service.name, service.type)
157
group.AddService(
158
self.interface, # interface
159
avahi.PROTO_INET6, # protocol
160
dbus.UInt32(0), # flags
161
self.name, self.type,
162
self.domain, self.host,
163
dbus.UInt16(self.port),
164
avahi.string_array_to_txt_array(self.TXT))
165
group.Commit()
166
89
167
# From the Avahi example code:
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
168
group = None # our entry group
99
169
# End of Avahi example code
100
170
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171
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176
fingerprint: string (40 or 32 hexadecimal digits); used to
107
177
uniquely identify the client
108
178
secret: bytestring; sent verbatim (over TLS) to client
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
179
host: string; available for use by the checker command
180
created: datetime.datetime(); object creation, not client host
181
last_checked_ok: datetime.datetime() or None if not yet checked OK
182
timeout: datetime.timedelta(); How long from last_checked_ok
183
until this client is invalid
114
184
interval: datetime.timedelta(); How often to start a new checker
115
185
stop_hook: If set, called by stop() as stop_hook(self)
116
186
checker: subprocess.Popen(); a running checker process used
117
187
to see if the client lives.
118
Is None if no process is running.
188
'None' if no process is running.
119
189
checker_initiator_tag: a gobject event source tag, or None
120
190
stop_initiator_tag: - '' -
121
191
checker_callback_tag: - '' -
122
192
checker_command: string; External command which is run to check if
123
client lives. %()s expansions are done at
193
client lives. %() expansions are done at
124
194
runtime with vars(self) as dict, so that for
125
195
instance %(name)s can be used in the command.
126
196
Private attibutes:
127
197
_timeout: Real variable for 'timeout'
128
198
_interval: Real variable for 'interval'
129
_timeout_milliseconds: Used by gobject.timeout_add()
199
_timeout_milliseconds: Used when calling gobject.timeout_add()
130
200
_interval_milliseconds: - '' -
131
201
"""
132
202
def _set_timeout(self, timeout):
152
222
interval = property(lambda self: self._interval,
153
223
_set_interval)
154
224
del _set_interval
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.."""
225
def __init__(self, name = None, stop_hook=None, config={}):
226
"""Note: the 'checker' key in 'config' sets the
227
'checker_command' attribute and *not* the 'checker'
228
attribute."""
160
229
self.name = name
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)
230
logger.debug(u"Creating client %r", self.name)
231
# Uppercase and remove spaces from fingerprint for later
232
# comparison purposes with return value from the fingerprint()
233
# function
234
self.fingerprint = config["fingerprint"].upper()\
235
.replace(u" ", u"")
236
logger.debug(u" Fingerprint: %s", self.fingerprint)
237
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
239
elif "secfile" in config:
240
sf = open(config["secfile"])
169
241
self.secret = sf.read()
170
242
sf.close()
171
243
else:
172
raise RuntimeError(u"No secret or secfile for client %s"
173
% self.name)
174
self.fqdn = fqdn # string
244
raise TypeError(u"No secret or secfile for client %s"
245
% self.name)
246
self.host = config.get("host", "")
175
247
self.created = datetime.datetime.now()
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)
248
self.last_checked_ok = None
249
self.timeout = string_to_delta(config["timeout"])
250
self.interval = string_to_delta(config["interval"])
185
251
self.stop_hook = stop_hook
186
252
self.checker = None
187
253
self.checker_initiator_tag = None
188
254
self.stop_initiator_tag = None
189
255
self.checker_callback_tag = None
190
self.check_command = checker
256
self.check_command = config["checker"]
191
257
def start(self):
192
258
"""Start this client's checker and timeout hooks"""
193
259
# Schedule a new checker to be started an 'interval' from now,
203
269
self.stop)
204
270
def stop(self):
205
271
"""Stop this client.
206
The possibility that this client might be restarted is left
207
open, but not currently used."""
272
The possibility that a client might be restarted is left open,
273
but not currently used."""
208
274
# If this client doesn't have a secret, it is already stopped.
209
if self.secret:
210
logger.debug(u"Stopping client %s", self.name)
275
if hasattr(self, "secret") and self.secret:
276
logger.info(u"Stopping client %s", self.name)
211
277
self.secret = None
212
278
else:
213
279
return False
214
if hasattr(self, "stop_initiator_tag") \
215
and self.stop_initiator_tag:
280
if getattr(self, "stop_initiator_tag", False):
216
281
gobject.source_remove(self.stop_initiator_tag)
217
282
self.stop_initiator_tag = None
218
if hasattr(self, "checker_initiator_tag") \
219
and self.checker_initiator_tag:
283
if getattr(self, "checker_initiator_tag", False):
220
284
gobject.source_remove(self.checker_initiator_tag)
221
285
self.checker_initiator_tag = None
222
286
self.stop_checker()
234
298
self.checker = None
235
299
if os.WIFEXITED(condition) \
236
300
and (os.WEXITSTATUS(condition) == 0):
237
logger.debug(u"Checker for %(name)s succeeded",
238
vars(self))
239
self.last_seen = now
301
logger.info(u"Checker for %(name)s succeeded",
302
vars(self))
303
self.last_checked_ok = now
240
304
gobject.source_remove(self.stop_initiator_tag)
241
305
self.stop_initiator_tag = gobject.timeout_add\
242
306
(self._timeout_milliseconds,
245
309
logger.warning(u"Checker for %(name)s crashed?",
246
310
vars(self))
247
311
else:
248
logger.debug(u"Checker for %(name)s failed",
249
vars(self))
312
logger.info(u"Checker for %(name)s failed",
313
vars(self))
250
314
def start_checker(self):
251
315
"""Start a new checker subprocess if one is not running.
252
316
If a checker already exists, leave it running and do
261
325
# is as it should be.
262
326
if self.checker is None:
263
327
try:
264
command = self.check_command % self.fqdn
328
# In case check_command has exactly one % operator
329
command = self.check_command % self.host
265
330
except TypeError:
331
# Escape attributes for the shell
266
332
escaped_attrs = dict((key, re.escape(str(val)))
267
333
for key, val in
268
334
vars(self).iteritems())
269
335
try:
270
336
command = self.check_command % escaped_attrs
271
337
except TypeError, error:
272
logger.critical(u'Could not format string "%s":'
273
u' %s', self.check_command, error)
338
logger.error(u'Could not format string "%s":'
339
u' %s', self.check_command, error)
274
340
return True # Try again later
275
341
try:
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="/")
342
logger.info(u"Starting checker %r for %s",
343
command, self.name)
344
# We don't need to redirect stdout and stderr, since
345
# in normal mode, that is already done by daemon(),
346
# and in debug mode we don't want to. (Stdin is
347
# always replaced by /dev/null.)
348
self.checker = subprocess.Popen(command,
349
close_fds=True,
350
shell=True, cwd="/")
282
351
self.checker_callback_tag = gobject.child_watch_add\
283
352
(self.checker.pid,
284
353
self.checker_callback)
285
except subprocess.OSError, error:
354
except OSError, error:
286
355
logger.error(u"Failed to start subprocess: %s",
287
356
error)
288
357
# Re-run this periodically if run by gobject.timeout_add
292
361
if self.checker_callback_tag:
293
362
gobject.source_remove(self.checker_callback_tag)
294
363
self.checker_callback_tag = None
295
if not hasattr(self, "checker") or self.checker is None:
364
if getattr(self, "checker", None) is None:
296
365
return
297
logger.debug("Stopping checker for %(name)s", vars(self))
366
logger.debug(u"Stopping checker for %(name)s", vars(self))
298
367
try:
299
368
os.kill(self.checker.pid, signal.SIGTERM)
300
369
#os.sleep(0.5)
301
370
#if self.checker.poll() is None:
302
371
# os.kill(self.checker.pid, signal.SIGKILL)
303
372
except OSError, error:
304
if error.errno != errno.ESRCH:
373
if error.errno != errno.ESRCH: # No such process
305
374
raise
306
375
self.checker = None
307
def still_valid(self, now=None):
376
def still_valid(self):
308
377
"""Has the timeout not yet passed for this client?"""
309
if now is None:
310
now = datetime.datetime.now()
311
if self.last_seen is None:
378
now = datetime.datetime.now()
379
if self.last_checked_ok is None:
312
380
return now < (self.created + self.timeout)
313
381
else:
314
return now < (self.last_seen + self.timeout)
382
return now < (self.last_checked_ok + self.timeout)
315
383
316
384
317
385
def peer_certificate(session):
333
401
334
402
def fingerprint(openpgp):
335
403
"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))
340
404
# New GnuTLS "datum" with the OpenPGP public key
341
405
datum = gnutls.library.types.gnutls_datum_t\
342
406
(ctypes.cast(ctypes.c_char_p(openpgp),
343
407
ctypes.POINTER(ctypes.c_ubyte)),
344
408
ctypes.c_uint(len(openpgp)))
409
# New empty GnuTLS certificate
410
crt = gnutls.library.types.gnutls_openpgp_crt_t()
411
gnutls.library.functions.gnutls_openpgp_crt_init\
412
(ctypes.byref(crt))
345
413
# Import the OpenPGP public key into the certificate
346
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
347
(crt,
348
ctypes.byref(datum),
349
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
414
gnutls.library.functions.gnutls_openpgp_crt_import\
415
(crt, ctypes.byref(datum),
416
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
417
# Verify the self signature in the key
418
crtverify = ctypes.c_uint();
419
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
420
(crt, 0, ctypes.byref(crtverify))
421
if crtverify.value != 0:
422
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
423
raise gnutls.errors.CertificateSecurityError("Verify failed")
350
424
# New buffer for the fingerprint
351
425
buffer = ctypes.create_string_buffer(20)
352
426
buffer_length = ctypes.c_size_t()
368
442
Note: This will run in its own forked process."""
369
443
370
444
def handle(self):
371
logger.debug(u"TCP connection from: %s",
445
logger.info(u"TCP connection from: %s",
372
446
unicode(self.client_address))
373
session = gnutls.connection.ClientSession(self.request,
374
gnutls.connection.\
375
X509Credentials())
447
session = gnutls.connection.ClientSession\
448
(self.request, gnutls.connection.X509Credentials())
449
450
line = self.request.makefile().readline()
451
logger.debug(u"Protocol version: %r", line)
452
try:
453
if int(line.strip().split()[0]) > 1:
454
raise RuntimeError
455
except (ValueError, IndexError, RuntimeError), error:
456
logger.error(u"Unknown protocol version: %s", error)
457
return
458
459
# Note: gnutls.connection.X509Credentials is really a generic
460
# GnuTLS certificate credentials object so long as no X.509
461
# keys are added to it. Therefore, we can use it here despite
462
# using OpenPGP certificates.
376
463
377
464
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
378
465
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
379
466
# "+DHE-DSS"))
380
priority = "SECURE256"
381
467
priority = "NORMAL" # Fallback default, since this
468
# MUST be set.
469
if self.server.settings["priority"]:
470
priority = self.server.settings["priority"]
382
471
gnutls.library.functions.gnutls_priority_set_direct\
383
472
(session._c_object, priority, None);
384
473
385
474
try:
386
475
session.handshake()
387
476
except gnutls.errors.GNUTLSError, error:
388
logger.debug(u"Handshake failed: %s", error)
477
logger.warning(u"Handshake failed: %s", error)
389
478
# Do not run session.bye() here: the session is not
390
479
# established. Just abandon the request.
391
480
return
392
481
try:
393
482
fpr = fingerprint(peer_certificate(session))
394
483
except (TypeError, gnutls.errors.GNUTLSError), error:
395
logger.debug(u"Bad certificate: %s", error)
484
logger.warning(u"Bad certificate: %s", error)
396
485
session.bye()
397
486
return
398
487
logger.debug(u"Fingerprint: %s", fpr)
401
490
if c.fingerprint == fpr:
402
491
client = c
403
492
break
493
if not client:
494
logger.warning(u"Client not found for fingerprint: %s",
495
fpr)
496
session.bye()
497
return
404
498
# Have to check if client.still_valid(), since it is possible
405
499
# that the client timed out while establishing the GnuTLS
406
500
# session.
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)
501
if not client.still_valid():
502
logger.warning(u"Client %(name)s is invalid",
503
vars(client))
414
504
session.bye()
415
505
return
416
506
sent_size = 0
426
516
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
427
517
"""IPv6 TCP server. Accepts 'None' as address and/or port.
428
518
Attributes:
429
options: Command line options
519
settings: Server settings
430
520
clients: Set() of Client objects
521
enabled: Boolean; whether this server is activated yet
431
522
"""
432
523
address_family = socket.AF_INET6
433
524
def __init__(self, *args, **kwargs):
434
if "options" in kwargs:
435
self.options = kwargs["options"]
436
del kwargs["options"]
525
if "settings" in kwargs:
526
self.settings = kwargs["settings"]
527
del kwargs["settings"]
437
528
if "clients" in kwargs:
438
529
self.clients = kwargs["clients"]
439
530
del kwargs["clients"]
531
self.enabled = False
440
532
return super(type(self), self).__init__(*args, **kwargs)
441
533
def server_bind(self):
442
534
"""This overrides the normal server_bind() function
443
535
to bind to an interface if one was specified, and also NOT to
444
536
bind to an address or port if they were not specified."""
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
537
if self.settings["interface"]:
538
# 25 is from /usr/include/asm-i486/socket.h
539
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
449
540
try:
450
541
self.socket.setsockopt(socket.SOL_SOCKET,
451
socket.SO_BINDTODEVICE,
452
self.options.interface)
542
SO_BINDTODEVICE,
543
self.settings["interface"])
453
544
except socket.error, error:
454
545
if error[0] == errno.EPERM:
455
logger.warning(u"No permission to"
456
u" bind to interface %s",
457
self.options.interface)
546
logger.error(u"No permission to"
547
u" bind to interface %s",
548
self.settings["interface"])
458
549
else:
459
550
raise error
460
551
# Only bind(2) the socket if we really need to.
463
554
in6addr_any = "::"
464
555
self.server_address = (in6addr_any,
465
556
self.server_address[1])
466
elif self.server_address[1] is None:
557
elif not self.server_address[1]:
467
558
self.server_address = (self.server_address[0],
468
559
0)
560
# if self.settings["interface"]:
561
# self.server_address = (self.server_address[0],
562
# 0, # port
563
# 0, # flowinfo
564
# if_nametoindex
565
# (self.settings
566
# ["interface"]))
469
567
return super(type(self), self).server_bind()
568
def server_activate(self):
569
if self.enabled:
570
return super(type(self), self).server_activate()
571
def enable(self):
572
self.enabled = True
470
573
471
574
472
575
def string_to_delta(interval):
482
585
datetime.timedelta(1)
483
586
>>> string_to_delta(u'1w')
484
587
datetime.timedelta(7)
588
>>> string_to_delta('5m 30s')
589
datetime.timedelta(0, 330)
485
590
"""
486
try:
487
suffix=unicode(interval[-1])
488
value=int(interval[:-1])
489
if suffix == u"d":
490
delta = datetime.timedelta(value)
491
elif suffix == u"s":
492
delta = datetime.timedelta(0, value)
493
elif suffix == u"m":
494
delta = datetime.timedelta(0, 0, 0, 0, value)
495
elif suffix == u"h":
496
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
497
elif suffix == u"w":
498
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
499
else:
591
timevalue = datetime.timedelta(0)
592
for s in interval.split():
593
try:
594
suffix=unicode(s[-1])
595
value=int(s[:-1])
596
if suffix == u"d":
597
delta = datetime.timedelta(value)
598
elif suffix == u"s":
599
delta = datetime.timedelta(0, value)
600
elif suffix == u"m":
601
delta = datetime.timedelta(0, 0, 0, 0, value)
602
elif suffix == u"h":
603
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
604
elif suffix == u"w":
605
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
606
else:
607
raise ValueError
608
except (ValueError, IndexError):
500
609
raise ValueError
501
except (ValueError, IndexError):
502
raise ValueError
503
return delta
504
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()
610
timevalue += delta
611
return timevalue
537
612
538
613
539
614
def server_state_changed(state):
540
615
"""Derived from the Avahi example code"""
541
616
if state == avahi.SERVER_COLLISION:
542
logger.warning(u"Server name collision")
543
remove_service()
617
logger.error(u"Zeroconf server name collision")
618
service.remove()
544
619
elif state == avahi.SERVER_RUNNING:
545
add_service()
620
service.add()
546
621
547
622
548
623
def entry_group_state_changed(state, error):
549
624
"""Derived from the Avahi example code"""
550
global serviceName, server, rename_count
551
552
logger.debug(u"state change: %i", state)
625
logger.debug(u"Avahi state change: %i", state)
553
626
554
627
if state == avahi.ENTRY_GROUP_ESTABLISHED:
555
logger.debug(u"Service established.")
628
logger.debug(u"Zeroconf service established.")
556
629
elif state == avahi.ENTRY_GROUP_COLLISION:
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)
630
logger.warning(u"Zeroconf service name collision.")
631
service.rename()
570
632
elif state == avahi.ENTRY_GROUP_FAILURE:
571
logger.error(u"Error in group state changed %s",
572
unicode(error))
573
killme(1)
574
633
logger.critical(u"Avahi: Error in group state changed %s",
634
unicode(error))
635
raise AvahiGroupError("State changed: %s", str(error))
575
636
576
637
def if_nametoindex(interface):
577
"""Call the C function if_nametoindex()"""
638
"""Call the C function if_nametoindex(), or equivalent"""
639
global if_nametoindex
578
640
try:
579
libc = ctypes.cdll.LoadLibrary("libc.so.6")
580
return libc.if_nametoindex(interface)
641
if "ctypes.util" not in sys.modules:
642
import ctypes.util
643
if_nametoindex = ctypes.cdll.LoadLibrary\
644
(ctypes.util.find_library("c")).if_nametoindex
581
645
except (OSError, AttributeError):
582
646
if "struct" not in sys.modules:
583
647
import struct
584
648
if "fcntl" not in sys.modules:
585
649
import fcntl
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):
650
def if_nametoindex(interface):
651
"Get an interface index the hard way, i.e. using fcntl()"
652
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
653
s = socket.socket()
654
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
655
struct.pack("16s16x", interface))
656
s.close()
657
interface_index = struct.unpack("I", ifreq[16:20])[0]
658
return interface_index
659
return if_nametoindex(interface)
660
661
662
def daemon(nochdir = False, noclose = False):
596
663
"""See daemon(3). Standard BSD Unix function.
597
664
This should really exist as os.daemon, but it doesn't (yet)."""
598
665
if os.fork():
600
667
os.setsid()
601
668
if not nochdir:
602
669
os.chdir("/")
670
if os.fork():
671
sys.exit()
603
672
if not noclose:
604
673
# Close all standard open file descriptors
605
null = os.open("/dev/null", os.O_NOCTTY | os.O_RDWR)
674
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
606
675
if not stat.S_ISCHR(os.fstat(null).st_mode):
607
676
raise OSError(errno.ENODEV,
608
677
"/dev/null not a character device")
613
682
os.close(null)
614
683
615
684
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
625
685
def main():
626
global exitstatus
627
exitstatus = 0
628
686
global main_loop_started
629
687
main_loop_started = False
630
688
631
parser = OptionParser()
689
parser = OptionParser(version = "%%prog %s" % version)
632
690
parser.add_option("-i", "--interface", type="string",
633
default=None, metavar="IF",
634
help="Bind to interface IF")
635
parser.add_option("-a", "--address", type="string", default=None,
691
metavar="IF", help="Bind to interface IF")
692
parser.add_option("-a", "--address", type="string",
636
693
help="Address to listen for requests on")
637
parser.add_option("-p", "--port", type="int", default=None,
694
parser.add_option("-p", "--port", type="int",
638
695
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")
645
696
parser.add_option("--check", action="store_true", default=False,
646
697
help="Run self-test")
647
parser.add_option("--debug", action="store_true", default=False,
648
help="Debug mode")
698
parser.add_option("--debug", action="store_true",
699
help="Debug mode; run in foreground and log to"
700
" terminal")
701
parser.add_option("--priority", type="string", help="GnuTLS"
702
" priority string (see GnuTLS documentation)")
703
parser.add_option("--servicename", type="string", metavar="NAME",
704
help="Zeroconf service name")
705
parser.add_option("--configdir", type="string",
706
default="/etc/mandos", metavar="DIR",
707
help="Directory to search for configuration"
708
" files")
649
709
(options, args) = parser.parse_args()
650
710
651
711
if options.check:
653
713
doctest.testmod()
654
714
sys.exit()
655
715
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")
716
# Default values for config file for server-global settings
717
server_defaults = { "interface": "",
718
"address": "",
719
"port": "",
720
"debug": "False",
721
"priority":
722
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
723
"servicename": "Mandos",
724
}
725
726
# Parse config file for server-global settings
727
server_config = ConfigParser.SafeConfigParser(server_defaults)
728
del server_defaults
729
server_config.read(os.path.join(options.configdir, "mandos.conf"))
730
# Convert the SafeConfigParser object to a dict
731
server_settings = server_config.defaults()
732
# Use getboolean on the boolean config option
733
server_settings["debug"] = server_config.getboolean\
734
("DEFAULT", "debug")
735
del server_config
736
737
# Override the settings from the config file with command line
738
# options, if set.
739
for option in ("interface", "address", "port", "debug",
740
"priority", "servicename", "configdir"):
741
value = getattr(options, option)
742
if value is not None:
743
server_settings[option] = value
744
del options
745
# Now we have our good server settings in "server_settings"
746
747
debug = server_settings["debug"]
748
749
if not debug:
750
syslogger.setLevel(logging.WARNING)
751
console.setLevel(logging.WARNING)
752
753
if server_settings["servicename"] != "Mandos":
754
syslogger.setFormatter(logging.Formatter\
755
('Mandos (%s): %%(levelname)s:'
756
' %%(message)s'
757
% server_settings["servicename"]))
758
759
# Parse config file with clients
760
client_defaults = { "timeout": "1h",
761
"interval": "5m",
762
"checker": "fping -q -- %(host)s",
763
"host": "",
764
}
765
client_config = ConfigParser.SafeConfigParser(client_defaults)
766
client_config.read(os.path.join(server_settings["configdir"],
767
"clients.conf"))
768
769
clients = Set()
770
tcp_server = IPv6_TCPServer((server_settings["address"],
771
server_settings["port"]),
772
tcp_handler,
773
settings=server_settings,
774
clients=clients)
775
pidfilename = "/var/run/mandos.pid"
776
try:
777
pidfile = open(pidfilename, "w")
778
except IOError, error:
779
logger.error("Could not open file %r", pidfilename)
780
781
uid = 65534
782
gid = 65534
783
try:
784
uid = pwd.getpwnam("mandos").pw_uid
785
except KeyError:
786
try:
787
uid = pwd.getpwnam("nobody").pw_uid
788
except KeyError:
789
pass
790
try:
791
gid = pwd.getpwnam("mandos").pw_gid
792
except KeyError:
793
try:
794
gid = pwd.getpwnam("nogroup").pw_gid
795
except KeyError:
796
pass
797
try:
798
os.setuid(uid)
799
os.setgid(gid)
800
except OSError, error:
801
if error[0] != errno.EPERM:
802
raise error
803
804
global service
805
service = AvahiService(name = server_settings["servicename"],
806
type = "_mandos._tcp", );
807
if server_settings["interface"]:
808
service.interface = if_nametoindex\
809
(server_settings["interface"])
671
810
672
811
global main_loop
673
812
global bus
676
815
DBusGMainLoop(set_as_default=True )
677
816
main_loop = gobject.MainLoop()
678
817
bus = dbus.SystemBus()
679
server = dbus.Interface(
680
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
681
avahi.DBUS_INTERFACE_SERVER )
818
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
819
avahi.DBUS_PATH_SERVER),
820
avahi.DBUS_INTERFACE_SERVER)
682
821
# End of Avahi example code
683
822
684
debug = options.debug
685
686
if debug:
687
console = logging.StreamHandler()
688
# console.setLevel(logging.DEBUG)
689
console.setFormatter(logging.Formatter\
690
('%(levelname)s: %(message)s'))
691
logger.addHandler(console)
692
del console
693
694
clients = Set()
695
823
def remove_from_clients(client):
696
824
clients.remove(client)
697
825
if not clients:
698
logger.debug(u"No clients left, exiting")
699
killme()
826
logger.critical(u"No clients left, exiting")
827
sys.exit()
700
828
701
clients.update(Set(Client(name=section, options=options,
829
clients.update(Set(Client(name = section,
702
830
stop_hook = remove_from_clients,
703
**(dict(client_config\
704
.items(section))))
831
config
832
= dict(client_config.items(section)))
705
833
for section in client_config.sections()))
706
707
if not debug:
708
daemon(False, False)
834
if not clients:
835
logger.critical(u"No clients defined")
836
sys.exit(1)
837
838
if debug:
839
# Redirect stdin so all checkers get /dev/null
840
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
841
os.dup2(null, sys.stdin.fileno())
842
if null > 2:
843
os.close(null)
844
else:
845
# No console logging
846
logger.removeHandler(console)
847
# Close all input and output, do double fork, etc.
848
daemon()
849
850
try:
851
pid = os.getpid()
852
pidfile.write(str(pid) + "\n")
853
pidfile.close()
854
del pidfile
855
except IOError, err:
856
logger.error(u"Could not write to file %r with PID %d",
857
pidfilename, pid)
858
except NameError:
859
# "pidfile" was never created
860
pass
861
del pidfilename
709
862
710
863
def cleanup():
711
864
"Cleanup function; run on exit"
725
878
726
879
if not debug:
727
880
signal.signal(signal.SIGINT, signal.SIG_IGN)
728
signal.signal(signal.SIGHUP, lambda signum, frame: killme())
729
signal.signal(signal.SIGTERM, lambda signum, frame: killme())
881
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
882
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
730
883
731
884
for client in clients:
732
885
client.start()
733
886
734
tcp_server = IPv6_TCPServer((options.address, options.port),
735
tcp_handler,
736
options=options,
737
clients=clients)
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")
887
tcp_server.enable()
888
tcp_server.server_activate()
889
890
# Find out what port we got
891
service.port = tcp_server.socket.getsockname()[1]
892
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
893
u" scope_id %d" % tcp_server.socket.getsockname())
894
895
#service.interface = tcp_server.socket.getsockname()[3]
896
897
try:
898
# From the Avahi example code
899
server.connect_to_signal("StateChanged", server_state_changed)
900
try:
901
server_state_changed(server.GetState())
902
except dbus.exceptions.DBusException, error:
903
logger.critical(u"DBusException: %s", error)
904
sys.exit(1)
905
# End of Avahi example code
906
907
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
908
lambda *args, **kwargs:
909
tcp_server.handle_request\
910
(*args[2:], **kwargs) or True)
911
912
logger.debug(u"Starting main loop")
762
913
main_loop_started = True
763
914
main_loop.run()
915
except AvahiError, error:
916
logger.critical(u"AvahiError: %s" + unicode(error))
917
sys.exit(1)
764
918
except KeyboardInterrupt:
765
919
if debug:
766
920
print
767
768
sys.exit(exitstatus)
769
921
770
922
if __name__ == '__main__':
771
923
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0