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- Committer: Teddy Hogeborn
- Date: 2008-07-22 01:59:47 UTC
- Revision ID: teddy@fukt.bsnet.se-20080722015947-y7o6keji020nvrhw
* Makefile (OPTIMIZE): New; optimize for size.
(CFLAGS): Use $(OPTIMIZE).
(CFLAGS): Use $(OPTIMIZE).
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- clients.conf => mandos-clients.conf
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.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".
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# following functions: "add_service", "remove_service",
10
# "server_state_changed", "entry_group_state_changed", and some lines
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# in "main".
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12
#
13
# Everything else is
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# Copyright © 2008,2009 Teddy Hogeborn
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# Copyright © 2008,2009 Björn Påhlsson
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# Everything else is Copyright © 2007-2008 Teddy Hogeborn and Björn
14
# Påhlsson.
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15
#
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16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
25
24
# GNU General Public License for more details.
26
25
#
27
26
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
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28
#
31
# 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/>.
32
31
#
33
32
34
from __future__ import division, with_statement, absolute_import
33
from __future__ import division
35
34
36
35
import SocketServer
37
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import socket
38
import optparse
37
import select
38
from optparse import OptionParser
39
39
import datetime
40
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import errno
41
41
import gnutls.crypto
55
55
import stat
56
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import logging
57
57
import logging.handlers
58
import pwd
59
from contextlib import closing
60
58
61
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import dbus
62
import dbus.service
63
60
import gobject
64
61
import avahi
65
62
from dbus.mainloop.glib import DBusGMainLoop
66
63
import ctypes
67
import ctypes.util
68
69
version = "1.0.8"
64
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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
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.
75
70
76
71
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logger = logging.Logger('mandos')
72
syslogger = (logging.handlers.SysLogHandler
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
75
syslogger.setFormatter(logging.Formatter
76
('Mandos [%(process)d]: %(levelname)s:'
77
' %(message)s'))
78
syslogger = logging.handlers.SysLogHandler\
79
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
80
syslogger.setFormatter(logging.Formatter\
81
('%(levelname)s: %(message)s'))
78
82
logger.addHandler(syslogger)
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
83
logger.addHandler(console)
84
85
class AvahiError(Exception):
86
def __init__(self, value, *args, **kwargs):
87
self.value = value
88
super(AvahiError, self).__init__(value, *args, **kwargs)
89
def __unicode__(self):
90
return unicode(repr(self.value))
91
92
class AvahiServiceError(AvahiError):
93
pass
94
95
class AvahiGroupError(AvahiError):
96
pass
97
98
99
class AvahiService(object):
100
"""An Avahi (Zeroconf) service.
101
Attributes:
102
interface: integer; avahi.IF_UNSPEC or an interface index.
103
Used to optionally bind to the specified interface.
104
name: string; Example: 'Mandos'
105
type: string; Example: '_mandos._tcp'.
106
See <http://www.dns-sd.org/ServiceTypes.html>
107
port: integer; what port to announce
108
TXT: list of strings; TXT record for the service
109
domain: string; Domain to publish on, default to .local if empty.
110
host: string; Host to publish records for, default is localhost
111
max_renames: integer; maximum number of renames
112
rename_count: integer; counter so we only rename after collisions
113
a sensible number of times
114
"""
115
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
servicetype = None, port = None, TXT = None,
117
domain = "", host = "", max_renames = 32768,
118
protocol = avahi.PROTO_UNSPEC):
119
self.interface = interface
120
self.name = name
121
self.type = servicetype
122
self.port = port
123
self.TXT = TXT if TXT is not None else []
124
self.domain = domain
125
self.host = host
126
self.rename_count = 0
127
self.max_renames = max_renames
128
self.protocol = protocol
129
def rename(self):
130
"""Derived from the Avahi example code"""
131
if self.rename_count >= self.max_renames:
132
logger.critical(u"No suitable Zeroconf service name found"
133
u" after %i retries, exiting.",
134
self.rename_count)
135
raise AvahiServiceError(u"Too many renames")
136
self.name = server.GetAlternativeServiceName(self.name)
137
logger.info(u"Changing Zeroconf service name to %r ...",
138
str(self.name))
139
syslogger.setFormatter(logging.Formatter
140
('Mandos (%s) [%%(process)d]:'
141
' %%(levelname)s: %%(message)s'
142
% self.name))
143
self.remove()
144
self.add()
145
self.rename_count += 1
146
def remove(self):
147
"""Derived from the Avahi example code"""
148
if group is not None:
149
group.Reset()
150
def add(self):
151
"""Derived from the Avahi example code"""
152
global group
153
if group is None:
154
group = dbus.Interface(bus.get_object
155
(avahi.DBUS_NAME,
156
server.EntryGroupNew()),
157
avahi.DBUS_INTERFACE_ENTRY_GROUP)
158
group.connect_to_signal('StateChanged',
159
entry_group_state_changed)
160
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
161
service.name, service.type)
162
group.AddService(
163
self.interface, # interface
164
self.protocol, # protocol
165
dbus.UInt32(0), # flags
166
self.name, self.type,
167
self.domain, self.host,
168
dbus.UInt16(self.port),
169
avahi.string_array_to_txt_array(self.TXT))
170
group.Commit()
171
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
172
89
# From the Avahi example code:
173
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
174
99
# End of Avahi example code
175
100
176
101
177
def _datetime_to_dbus(dt, variant_level=0):
178
"""Convert a UTC datetime.datetime() to a D-Bus type."""
179
return dbus.String(dt.isoformat(), variant_level=variant_level)
180
181
182
102
class Client(object):
183
103
"""A representation of a client host served by this server.
184
104
Attributes:
185
name: string; from the config file, used in log messages and
186
D-Bus identifiers
105
name: string; from the config file, used in log messages
187
106
fingerprint: string (40 or 32 hexadecimal digits); used to
188
107
uniquely identify the client
189
secret: bytestring; sent verbatim (over TLS) to client
190
host: string; available for use by the checker command
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created: datetime.datetime(); (UTC) object creation
192
last_enabled: datetime.datetime(); (UTC)
193
enabled: bool()
194
last_checked_ok: datetime.datetime(); (UTC) or None
195
timeout: datetime.timedelta(); How long from last_checked_ok
196
until this client is invalid
197
interval: datetime.timedelta(); How often to start a new checker
198
disable_hook: If set, called by disable() as disable_hook(self)
199
checker: subprocess.Popen(); a running checker process used
200
to see if the client lives.
201
'None' if no process is running.
108
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
114
interval: datetime.timedelta(); How often to start a new checker
115
stop_hook: If set, called by stop() as stop_hook(self)
116
checker: subprocess.Popen(); a running checker process used
117
to see if the client lives.
118
Is None if no process is running.
202
119
checker_initiator_tag: a gobject event source tag, or None
203
disable_initiator_tag: - '' -
120
stop_initiator_tag: - '' -
204
121
checker_callback_tag: - '' -
205
122
checker_command: string; External command which is run to check if
206
client lives. %() expansions are done at
123
client lives. %()s expansions are done at
207
124
runtime with vars(self) as dict, so that for
208
125
instance %(name)s can be used in the command.
209
current_checker_command: string; current running checker_command
126
Private attibutes:
127
_timeout: Real variable for 'timeout'
128
_interval: Real variable for 'interval'
129
_timeout_milliseconds: Used by gobject.timeout_add()
130
_interval_milliseconds: - '' -
210
131
"""
211
def timeout_milliseconds(self):
212
"Return the 'timeout' attribute in milliseconds"
213
return ((self.timeout.days * 24 * 60 * 60 * 1000)
214
+ (self.timeout.seconds * 1000)
215
+ (self.timeout.microseconds // 1000))
216
217
def interval_milliseconds(self):
218
"Return the 'interval' attribute in milliseconds"
219
return ((self.interval.days * 24 * 60 * 60 * 1000)
220
+ (self.interval.seconds * 1000)
221
+ (self.interval.microseconds // 1000))
222
223
def __init__(self, name = None, disable_hook=None, config=None):
224
"""Note: the 'checker' key in 'config' sets the
225
'checker_command' attribute and *not* the 'checker'
226
attribute."""
132
def _set_timeout(self, timeout):
133
"Setter function for 'timeout' attribute"
134
self._timeout = timeout
135
self._timeout_milliseconds = ((self.timeout.days
136
* 24 * 60 * 60 * 1000)
137
+ (self.timeout.seconds * 1000)
138
+ (self.timeout.microseconds
139
// 1000))
140
timeout = property(lambda self: self._timeout,
141
_set_timeout)
142
del _set_timeout
143
def _set_interval(self, interval):
144
"Setter function for 'interval' attribute"
145
self._interval = interval
146
self._interval_milliseconds = ((self.interval.days
147
* 24 * 60 * 60 * 1000)
148
+ (self.interval.seconds
149
* 1000)
150
+ (self.interval.microseconds
151
// 1000))
152
interval = property(lambda self: self._interval,
153
_set_interval)
154
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.."""
227
160
self.name = name
228
if config is None:
229
config = {}
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
with closing(open(os.path.expanduser
241
(os.path.expandvars
242
(config["secfile"])))) as secfile:
243
self.secret = secfile.read()
244
else:
245
raise TypeError(u"No secret or secfile for client %s"
246
% self.name)
247
self.host = config.get("host", "")
248
self.created = datetime.datetime.utcnow()
249
self.enabled = False
250
self.last_enabled = None
251
self.last_checked_ok = None
252
self.timeout = string_to_delta(config["timeout"])
253
self.interval = string_to_delta(config["interval"])
254
self.disable_hook = disable_hook
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)
169
self.secret = sf.read()
170
sf.close()
171
else:
172
raise RuntimeError(u"No secret or secfile for client %s"
173
% self.name)
174
self.fqdn = fqdn # string
175
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)
185
self.stop_hook = stop_hook
255
186
self.checker = None
256
187
self.checker_initiator_tag = None
257
self.disable_initiator_tag = None
188
self.stop_initiator_tag = None
258
189
self.checker_callback_tag = None
259
self.checker_command = config["checker"]
260
self.current_checker_command = None
261
self.last_connect = None
262
263
def enable(self):
190
self.check_command = checker
191
def start(self):
264
192
"""Start this client's checker and timeout hooks"""
265
self.last_enabled = datetime.datetime.utcnow()
266
193
# Schedule a new checker to be started an 'interval' from now,
267
194
# and every interval from then on.
268
self.checker_initiator_tag = (gobject.timeout_add
269
(self.interval_milliseconds(),
270
self.start_checker))
195
self.checker_initiator_tag = gobject.timeout_add\
196
(self._interval_milliseconds,
197
self.start_checker)
271
198
# Also start a new checker *right now*.
272
199
self.start_checker()
273
# Schedule a disable() when 'timeout' has passed
274
self.disable_initiator_tag = (gobject.timeout_add
275
(self.timeout_milliseconds(),
276
self.disable))
277
self.enabled = True
278
279
def disable(self):
280
"""Disable this client."""
281
if not getattr(self, "enabled", False):
200
# Schedule a stop() when 'timeout' has passed
201
self.stop_initiator_tag = gobject.timeout_add\
202
(self._timeout_milliseconds,
203
self.stop)
204
def stop(self):
205
"""Stop this client.
206
The possibility that this client might be restarted is left
207
open, but not currently used."""
208
# 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)
211
self.secret = None
212
else:
282
213
return False
283
logger.info(u"Disabling client %s", self.name)
284
if getattr(self, "disable_initiator_tag", False):
285
gobject.source_remove(self.disable_initiator_tag)
286
self.disable_initiator_tag = None
287
if getattr(self, "checker_initiator_tag", False):
214
if hasattr(self, "stop_initiator_tag") \
215
and self.stop_initiator_tag:
216
gobject.source_remove(self.stop_initiator_tag)
217
self.stop_initiator_tag = None
218
if hasattr(self, "checker_initiator_tag") \
219
and self.checker_initiator_tag:
288
220
gobject.source_remove(self.checker_initiator_tag)
289
221
self.checker_initiator_tag = None
290
222
self.stop_checker()
291
if self.disable_hook:
292
self.disable_hook(self)
293
self.enabled = False
223
if self.stop_hook:
224
self.stop_hook(self)
294
225
# Do not run this again if called by a gobject.timeout_add
295
226
return False
296
297
227
def __del__(self):
298
self.disable_hook = None
299
self.disable()
300
301
def checker_callback(self, pid, condition, command):
228
self.stop_hook = None
229
self.stop()
230
def checker_callback(self, pid, condition):
302
231
"""The checker has completed, so take appropriate actions."""
232
now = datetime.datetime.now()
303
233
self.checker_callback_tag = None
304
234
self.checker = None
305
if os.WIFEXITED(condition):
306
exitstatus = os.WEXITSTATUS(condition)
307
if exitstatus == 0:
308
logger.info(u"Checker for %(name)s succeeded",
309
vars(self))
310
self.checked_ok()
311
else:
312
logger.info(u"Checker for %(name)s failed",
313
vars(self))
314
else:
235
if os.WIFEXITED(condition) \
236
and (os.WEXITSTATUS(condition) == 0):
237
logger.debug(u"Checker for %(name)s succeeded",
238
vars(self))
239
self.last_seen = now
240
gobject.source_remove(self.stop_initiator_tag)
241
self.stop_initiator_tag = gobject.timeout_add\
242
(self._timeout_milliseconds,
243
self.stop)
244
elif not os.WIFEXITED(condition):
315
245
logger.warning(u"Checker for %(name)s crashed?",
316
246
vars(self))
317
318
def checked_ok(self):
319
"""Bump up the timeout for this client.
320
This should only be called when the client has been seen,
321
alive and well.
322
"""
323
self.last_checked_ok = datetime.datetime.utcnow()
324
gobject.source_remove(self.disable_initiator_tag)
325
self.disable_initiator_tag = (gobject.timeout_add
326
(self.timeout_milliseconds(),
327
self.disable))
328
247
else:
248
logger.debug(u"Checker for %(name)s failed",
249
vars(self))
329
250
def start_checker(self):
330
251
"""Start a new checker subprocess if one is not running.
331
252
If a checker already exists, leave it running and do
338
259
# checkers alone, the checker would have to take more time
339
260
# than 'timeout' for the client to be declared invalid, which
340
261
# is as it should be.
341
342
# If a checker exists, make sure it is not a zombie
343
if self.checker is not None:
344
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
345
if pid:
346
logger.warning("Checker was a zombie")
347
gobject.source_remove(self.checker_callback_tag)
348
self.checker_callback(pid, status,
349
self.current_checker_command)
350
# Start a new checker if needed
351
262
if self.checker is None:
352
263
try:
353
# In case checker_command has exactly one % operator
354
command = self.checker_command % self.host
264
command = self.check_command % self.fqdn
355
265
except TypeError:
356
# Escape attributes for the shell
357
266
escaped_attrs = dict((key, re.escape(str(val)))
358
267
for key, val in
359
268
vars(self).iteritems())
360
269
try:
361
command = self.checker_command % escaped_attrs
270
command = self.check_command % escaped_attrs
362
271
except TypeError, error:
363
logger.error(u'Could not format string "%s":'
364
u' %s', self.checker_command, error)
272
logger.critical(u'Could not format string "%s":'
273
u' %s', self.check_command, error)
365
274
return True # Try again later
366
self.current_checker_command = command
367
275
try:
368
logger.info(u"Starting checker %r for %s",
369
command, self.name)
370
# We don't need to redirect stdout and stderr, since
371
# in normal mode, that is already done by daemon(),
372
# and in debug mode we don't want to. (Stdin is
373
# always replaced by /dev/null.)
374
self.checker = subprocess.Popen(command,
375
close_fds=True,
376
shell=True, cwd="/")
377
self.checker_callback_tag = (gobject.child_watch_add
378
(self.checker.pid,
379
self.checker_callback,
380
data=command))
381
# The checker may have completed before the gobject
382
# watch was added. Check for this.
383
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
384
if pid:
385
gobject.source_remove(self.checker_callback_tag)
386
self.checker_callback(pid, status, command)
387
except OSError, error:
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="/")
282
self.checker_callback_tag = gobject.child_watch_add\
283
(self.checker.pid,
284
self.checker_callback)
285
except subprocess.OSError, error:
388
286
logger.error(u"Failed to start subprocess: %s",
389
287
error)
390
288
# Re-run this periodically if run by gobject.timeout_add
391
289
return True
392
393
290
def stop_checker(self):
394
291
"""Force the checker process, if any, to stop."""
395
292
if self.checker_callback_tag:
396
293
gobject.source_remove(self.checker_callback_tag)
397
294
self.checker_callback_tag = None
398
if getattr(self, "checker", None) is None:
295
if not hasattr(self, "checker") or self.checker is None:
399
296
return
400
logger.debug(u"Stopping checker for %(name)s", vars(self))
297
logger.debug("Stopping checker for %(name)s", vars(self))
401
298
try:
402
299
os.kill(self.checker.pid, signal.SIGTERM)
403
300
#os.sleep(0.5)
404
301
#if self.checker.poll() is None:
405
302
# os.kill(self.checker.pid, signal.SIGKILL)
406
303
except OSError, error:
407
if error.errno != errno.ESRCH: # No such process
304
if error.errno != errno.ESRCH:
408
305
raise
409
306
self.checker = None
410
411
def still_valid(self):
307
def still_valid(self, now=None):
412
308
"""Has the timeout not yet passed for this client?"""
413
if not getattr(self, "enabled", False):
414
return False
415
now = datetime.datetime.utcnow()
416
if self.last_checked_ok is None:
309
if now is None:
310
now = datetime.datetime.now()
311
if self.last_seen is None:
417
312
return now < (self.created + self.timeout)
418
313
else:
419
return now < (self.last_checked_ok + self.timeout)
420
421
422
class ClientDBus(Client, dbus.service.Object):
423
"""A Client class using D-Bus
424
Attributes:
425
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
426
"""
427
# dbus.service.Object doesn't use super(), so we can't either.
428
429
def __init__(self, *args, **kwargs):
430
Client.__init__(self, *args, **kwargs)
431
# Only now, when this client is initialized, can it show up on
432
# the D-Bus
433
self.dbus_object_path = (dbus.ObjectPath
434
("/clients/"
435
+ self.name.replace(".", "_")))
436
dbus.service.Object.__init__(self, bus,
437
self.dbus_object_path)
438
def enable(self):
439
oldstate = getattr(self, "enabled", False)
440
r = Client.enable(self)
441
if oldstate != self.enabled:
442
# Emit D-Bus signals
443
self.PropertyChanged(dbus.String(u"enabled"),
444
dbus.Boolean(True, variant_level=1))
445
self.PropertyChanged(dbus.String(u"last_enabled"),
446
(_datetime_to_dbus(self.last_enabled,
447
variant_level=1)))
448
return r
449
450
def disable(self, signal = True):
451
oldstate = getattr(self, "enabled", False)
452
r = Client.disable(self)
453
if signal and oldstate != self.enabled:
454
# Emit D-Bus signal
455
self.PropertyChanged(dbus.String(u"enabled"),
456
dbus.Boolean(False, variant_level=1))
457
return r
458
459
def __del__(self, *args, **kwargs):
460
try:
461
self.remove_from_connection()
462
except org.freedesktop.DBus.Python.LookupError:
463
pass
464
dbus.service.Object.__del__(self, *args, **kwargs)
465
Client.__del__(self, *args, **kwargs)
466
467
def checker_callback(self, pid, condition, command,
468
*args, **kwargs):
469
self.checker_callback_tag = None
470
self.checker = None
471
# Emit D-Bus signal
472
self.PropertyChanged(dbus.String(u"checker_running"),
473
dbus.Boolean(False, variant_level=1))
474
if os.WIFEXITED(condition):
475
exitstatus = os.WEXITSTATUS(condition)
476
# Emit D-Bus signal
477
self.CheckerCompleted(dbus.Int16(exitstatus),
478
dbus.Int64(condition),
479
dbus.String(command))
480
else:
481
# Emit D-Bus signal
482
self.CheckerCompleted(dbus.Int16(-1),
483
dbus.Int64(condition),
484
dbus.String(command))
485
486
return Client.checker_callback(self, pid, condition, command,
487
*args, **kwargs)
488
489
def checked_ok(self, *args, **kwargs):
490
r = Client.checked_ok(self, *args, **kwargs)
491
# Emit D-Bus signal
492
self.PropertyChanged(
493
dbus.String(u"last_checked_ok"),
494
(_datetime_to_dbus(self.last_checked_ok,
495
variant_level=1)))
496
return r
497
498
def start_checker(self, *args, **kwargs):
499
old_checker = self.checker
500
if self.checker is not None:
501
old_checker_pid = self.checker.pid
502
else:
503
old_checker_pid = None
504
r = Client.start_checker(self, *args, **kwargs)
505
# Only emit D-Bus signal if new checker process was started
506
if ((self.checker is not None)
507
and not (old_checker is not None
508
and old_checker_pid == self.checker.pid)):
509
self.CheckerStarted(self.current_checker_command)
510
self.PropertyChanged(
511
dbus.String("checker_running"),
512
dbus.Boolean(True, variant_level=1))
513
return r
514
515
def stop_checker(self, *args, **kwargs):
516
old_checker = getattr(self, "checker", None)
517
r = Client.stop_checker(self, *args, **kwargs)
518
if (old_checker is not None
519
and getattr(self, "checker", None) is None):
520
self.PropertyChanged(dbus.String(u"checker_running"),
521
dbus.Boolean(False, variant_level=1))
522
return r
523
524
## D-Bus methods & signals
525
_interface = u"se.bsnet.fukt.Mandos.Client"
526
527
# CheckedOK - method
528
CheckedOK = dbus.service.method(_interface)(checked_ok)
529
CheckedOK.__name__ = "CheckedOK"
530
531
# CheckerCompleted - signal
532
@dbus.service.signal(_interface, signature="nxs")
533
def CheckerCompleted(self, exitcode, waitstatus, command):
534
"D-Bus signal"
535
pass
536
537
# CheckerStarted - signal
538
@dbus.service.signal(_interface, signature="s")
539
def CheckerStarted(self, command):
540
"D-Bus signal"
541
pass
542
543
# GetAllProperties - method
544
@dbus.service.method(_interface, out_signature="a{sv}")
545
def GetAllProperties(self):
546
"D-Bus method"
547
return dbus.Dictionary({
548
dbus.String("name"):
549
dbus.String(self.name, variant_level=1),
550
dbus.String("fingerprint"):
551
dbus.String(self.fingerprint, variant_level=1),
552
dbus.String("host"):
553
dbus.String(self.host, variant_level=1),
554
dbus.String("created"):
555
_datetime_to_dbus(self.created, variant_level=1),
556
dbus.String("last_enabled"):
557
(_datetime_to_dbus(self.last_enabled,
558
variant_level=1)
559
if self.last_enabled is not None
560
else dbus.Boolean(False, variant_level=1)),
561
dbus.String("enabled"):
562
dbus.Boolean(self.enabled, variant_level=1),
563
dbus.String("last_checked_ok"):
564
(_datetime_to_dbus(self.last_checked_ok,
565
variant_level=1)
566
if self.last_checked_ok is not None
567
else dbus.Boolean (False, variant_level=1)),
568
dbus.String("timeout"):
569
dbus.UInt64(self.timeout_milliseconds(),
570
variant_level=1),
571
dbus.String("interval"):
572
dbus.UInt64(self.interval_milliseconds(),
573
variant_level=1),
574
dbus.String("checker"):
575
dbus.String(self.checker_command,
576
variant_level=1),
577
dbus.String("checker_running"):
578
dbus.Boolean(self.checker is not None,
579
variant_level=1),
580
dbus.String("object_path"):
581
dbus.ObjectPath(self.dbus_object_path,
582
variant_level=1)
583
}, signature="sv")
584
585
# IsStillValid - method
586
@dbus.service.method(_interface, out_signature="b")
587
def IsStillValid(self):
588
return self.still_valid()
589
590
# PropertyChanged - signal
591
@dbus.service.signal(_interface, signature="sv")
592
def PropertyChanged(self, property, value):
593
"D-Bus signal"
594
pass
595
596
# ReceivedSecret - signal
597
@dbus.service.signal(_interface)
598
def ReceivedSecret(self):
599
"D-Bus signal"
600
pass
601
602
# Rejected - signal
603
@dbus.service.signal(_interface)
604
def Rejected(self):
605
"D-Bus signal"
606
pass
607
608
# SetChecker - method
609
@dbus.service.method(_interface, in_signature="s")
610
def SetChecker(self, checker):
611
"D-Bus setter method"
612
self.checker_command = checker
613
# Emit D-Bus signal
614
self.PropertyChanged(dbus.String(u"checker"),
615
dbus.String(self.checker_command,
616
variant_level=1))
617
618
# SetHost - method
619
@dbus.service.method(_interface, in_signature="s")
620
def SetHost(self, host):
621
"D-Bus setter method"
622
self.host = host
623
# Emit D-Bus signal
624
self.PropertyChanged(dbus.String(u"host"),
625
dbus.String(self.host, variant_level=1))
626
627
# SetInterval - method
628
@dbus.service.method(_interface, in_signature="t")
629
def SetInterval(self, milliseconds):
630
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
631
# Emit D-Bus signal
632
self.PropertyChanged(dbus.String(u"interval"),
633
(dbus.UInt64(self.interval_milliseconds(),
634
variant_level=1)))
635
636
# SetSecret - method
637
@dbus.service.method(_interface, in_signature="ay",
638
byte_arrays=True)
639
def SetSecret(self, secret):
640
"D-Bus setter method"
641
self.secret = str(secret)
642
643
# SetTimeout - method
644
@dbus.service.method(_interface, in_signature="t")
645
def SetTimeout(self, milliseconds):
646
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
647
# Emit D-Bus signal
648
self.PropertyChanged(dbus.String(u"timeout"),
649
(dbus.UInt64(self.timeout_milliseconds(),
650
variant_level=1)))
651
652
# Enable - method
653
Enable = dbus.service.method(_interface)(enable)
654
Enable.__name__ = "Enable"
655
656
# StartChecker - method
657
@dbus.service.method(_interface)
658
def StartChecker(self):
659
"D-Bus method"
660
self.start_checker()
661
662
# Disable - method
663
@dbus.service.method(_interface)
664
def Disable(self):
665
"D-Bus method"
666
self.disable()
667
668
# StopChecker - method
669
StopChecker = dbus.service.method(_interface)(stop_checker)
670
StopChecker.__name__ = "StopChecker"
671
672
del _interface
314
return now < (self.last_seen + self.timeout)
673
315
674
316
675
317
def peer_certificate(session):
676
318
"Return the peer's OpenPGP certificate as a bytestring"
677
319
# If not an OpenPGP certificate...
678
if (gnutls.library.functions
679
.gnutls_certificate_type_get(session._c_object)
680
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
320
if gnutls.library.functions.gnutls_certificate_type_get\
321
(session._c_object) \
322
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
681
323
# ...do the normal thing
682
324
return session.peer_certificate
683
list_size = ctypes.c_uint(1)
684
cert_list = (gnutls.library.functions
685
.gnutls_certificate_get_peers
686
(session._c_object, ctypes.byref(list_size)))
687
if not bool(cert_list) and list_size.value != 0:
688
raise gnutls.errors.GNUTLSError("error getting peer"
689
" certificate")
325
list_size = ctypes.c_uint()
326
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
327
(session._c_object, ctypes.byref(list_size))
690
328
if list_size.value == 0:
691
329
return None
692
330
cert = cert_list[0]
695
333
696
334
def fingerprint(openpgp):
697
335
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
698
# New GnuTLS "datum" with the OpenPGP public key
699
datum = (gnutls.library.types
700
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
701
ctypes.POINTER
702
(ctypes.c_ubyte)),
703
ctypes.c_uint(len(openpgp))))
704
336
# New empty GnuTLS certificate
705
337
crt = gnutls.library.types.gnutls_openpgp_crt_t()
706
(gnutls.library.functions
707
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
338
gnutls.library.functions.gnutls_openpgp_crt_init\
339
(ctypes.byref(crt))
340
# New GnuTLS "datum" with the OpenPGP public key
341
datum = gnutls.library.types.gnutls_datum_t\
342
(ctypes.cast(ctypes.c_char_p(openpgp),
343
ctypes.POINTER(ctypes.c_ubyte)),
344
ctypes.c_uint(len(openpgp)))
708
345
# Import the OpenPGP public key into the certificate
709
(gnutls.library.functions
710
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
711
gnutls.library.constants
712
.GNUTLS_OPENPGP_FMT_RAW))
713
# Verify the self signature in the key
714
crtverify = ctypes.c_uint()
715
(gnutls.library.functions
716
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
717
if crtverify.value != 0:
718
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
719
raise gnutls.errors.CertificateSecurityError("Verify failed")
346
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
347
(crt,
348
ctypes.byref(datum),
349
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
720
350
# New buffer for the fingerprint
721
buf = ctypes.create_string_buffer(20)
722
buf_len = ctypes.c_size_t()
351
buffer = ctypes.create_string_buffer(20)
352
buffer_length = ctypes.c_size_t()
723
353
# Get the fingerprint from the certificate into the buffer
724
(gnutls.library.functions
725
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
726
ctypes.byref(buf_len)))
354
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
355
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
727
356
# Deinit the certificate
728
357
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
729
358
# Convert the buffer to a Python bytestring
730
fpr = ctypes.string_at(buf, buf_len.value)
359
fpr = ctypes.string_at(buffer, buffer_length.value)
731
360
# Convert the bytestring to hexadecimal notation
732
361
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
733
362
return hex_fpr
734
363
735
364
736
class TCP_handler(SocketServer.BaseRequestHandler, object):
365
class tcp_handler(SocketServer.BaseRequestHandler, object):
737
366
"""A TCP request handler class.
738
367
Instantiated by IPv6_TCPServer for each request to handle it.
739
368
Note: This will run in its own forked process."""
740
369
741
370
def handle(self):
742
logger.info(u"TCP connection from: %s",
743
unicode(self.client_address))
744
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
745
# Open IPC pipe to parent process
746
with closing(os.fdopen(self.server.pipe[1], "w", 1)) as ipc:
747
session = (gnutls.connection
748
.ClientSession(self.request,
749
gnutls.connection
750
.X509Credentials()))
751
752
line = self.request.makefile().readline()
753
logger.debug(u"Protocol version: %r", line)
754
try:
755
if int(line.strip().split()[0]) > 1:
756
raise RuntimeError
757
except (ValueError, IndexError, RuntimeError), error:
758
logger.error(u"Unknown protocol version: %s", error)
759
return
760
761
# Note: gnutls.connection.X509Credentials is really a
762
# generic GnuTLS certificate credentials object so long as
763
# no X.509 keys are added to it. Therefore, we can use it
764
# here despite using OpenPGP certificates.
765
766
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
767
# "+AES-256-CBC", "+SHA1",
768
# "+COMP-NULL", "+CTYPE-OPENPGP",
769
# "+DHE-DSS"))
770
# Use a fallback default, since this MUST be set.
771
priority = self.server.settings.get("priority", "NORMAL")
772
(gnutls.library.functions
773
.gnutls_priority_set_direct(session._c_object,
774
priority, None))
775
776
try:
777
session.handshake()
778
except gnutls.errors.GNUTLSError, error:
779
logger.warning(u"Handshake failed: %s", error)
780
# Do not run session.bye() here: the session is not
781
# established. Just abandon the request.
782
return
783
logger.debug(u"Handshake succeeded")
784
try:
785
fpr = fingerprint(peer_certificate(session))
786
except (TypeError, gnutls.errors.GNUTLSError), error:
787
logger.warning(u"Bad certificate: %s", error)
788
session.bye()
789
return
790
logger.debug(u"Fingerprint: %s", fpr)
791
792
for c in self.server.clients:
793
if c.fingerprint == fpr:
794
client = c
795
break
371
logger.debug(u"TCP connection from: %s",
372
unicode(self.client_address))
373
session = gnutls.connection.ClientSession(self.request,
374
gnutls.connection.\
375
X509Credentials())
376
377
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
378
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
379
# "+DHE-DSS"))
380
priority = "SECURE256"
381
382
gnutls.library.functions.gnutls_priority_set_direct\
383
(session._c_object, priority, None);
384
385
try:
386
session.handshake()
387
except gnutls.errors.GNUTLSError, error:
388
logger.debug(u"Handshake failed: %s", error)
389
# Do not run session.bye() here: the session is not
390
# established. Just abandon the request.
391
return
392
try:
393
fpr = fingerprint(peer_certificate(session))
394
except (TypeError, gnutls.errors.GNUTLSError), error:
395
logger.debug(u"Bad certificate: %s", error)
396
session.bye()
397
return
398
logger.debug(u"Fingerprint: %s", fpr)
399
client = None
400
for c in self.server.clients:
401
if c.fingerprint == fpr:
402
client = c
403
break
404
# Have to check if client.still_valid(), since it is possible
405
# that the client timed out while establishing the GnuTLS
406
# 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))
796
411
else:
797
logger.warning(u"Client not found for fingerprint: %s",
798
fpr)
799
ipc.write("NOTFOUND %s\n" % fpr)
800
session.bye()
801
return
802
# Have to check if client.still_valid(), since it is
803
# possible that the client timed out while establishing
804
# the GnuTLS session.
805
if not client.still_valid():
806
logger.warning(u"Client %(name)s is invalid",
807
vars(client))
808
ipc.write("INVALID %s\n" % client.name)
809
session.bye()
810
return
811
ipc.write("SENDING %s\n" % client.name)
812
sent_size = 0
813
while sent_size < len(client.secret):
814
sent = session.send(client.secret[sent_size:])
815
logger.debug(u"Sent: %d, remaining: %d",
816
sent, len(client.secret)
817
- (sent_size + sent))
818
sent_size += sent
412
logger.debug(u"Client not found for fingerprint: %s",
413
fpr)
819
414
session.bye()
820
821
822
class ForkingMixInWithPipe(SocketServer.ForkingMixIn, object):
823
"""Like SocketServer.ForkingMixIn, but also pass a pipe.
824
Assumes a gobject.MainLoop event loop.
825
"""
826
def process_request(self, request, client_address):
827
"""This overrides and wraps the original process_request().
828
This function creates a new pipe in self.pipe
829
"""
830
self.pipe = os.pipe()
831
super(ForkingMixInWithPipe,
832
self).process_request(request, client_address)
833
os.close(self.pipe[1]) # close write end
834
# Call "handle_ipc" for both data and EOF events
835
gobject.io_add_watch(self.pipe[0],
836
gobject.IO_IN | gobject.IO_HUP,
837
self.handle_ipc)
838
def handle_ipc(source, condition):
839
"""Dummy function; override as necessary"""
840
os.close(source)
841
return False
842
843
844
class IPv6_TCPServer(ForkingMixInWithPipe,
845
SocketServer.TCPServer, object):
846
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
415
return
416
sent_size = 0
417
while sent_size < len(client.secret):
418
sent = session.send(client.secret[sent_size:])
419
logger.debug(u"Sent: %d, remaining: %d",
420
sent, len(client.secret)
421
- (sent_size + sent))
422
sent_size += sent
423
session.bye()
424
425
426
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
427
"""IPv6 TCP server. Accepts 'None' as address and/or port.
847
428
Attributes:
848
settings: Server settings
429
options: Command line options
849
430
clients: Set() of Client objects
850
enabled: Boolean; whether this server is activated yet
851
431
"""
852
432
address_family = socket.AF_INET6
853
433
def __init__(self, *args, **kwargs):
854
if "settings" in kwargs:
855
self.settings = kwargs["settings"]
856
del kwargs["settings"]
434
if "options" in kwargs:
435
self.options = kwargs["options"]
436
del kwargs["options"]
857
437
if "clients" in kwargs:
858
438
self.clients = kwargs["clients"]
859
439
del kwargs["clients"]
860
if "use_ipv6" in kwargs:
861
if not kwargs["use_ipv6"]:
862
self.address_family = socket.AF_INET
863
del kwargs["use_ipv6"]
864
self.enabled = False
865
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
440
return super(type(self), self).__init__(*args, **kwargs)
866
441
def server_bind(self):
867
442
"""This overrides the normal server_bind() function
868
443
to bind to an interface if one was specified, and also NOT to
869
444
bind to an address or port if they were not specified."""
870
if self.settings["interface"]:
871
# 25 is from /usr/include/asm-i486/socket.h
872
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
873
449
try:
874
450
self.socket.setsockopt(socket.SOL_SOCKET,
875
SO_BINDTODEVICE,
876
self.settings["interface"])
451
socket.SO_BINDTODEVICE,
452
self.options.interface)
877
453
except socket.error, error:
878
454
if error[0] == errno.EPERM:
879
logger.error(u"No permission to"
880
u" bind to interface %s",
881
self.settings["interface"])
455
logger.warning(u"No permission to"
456
u" bind to interface %s",
457
self.options.interface)
882
458
else:
883
raise
459
raise error
884
460
# Only bind(2) the socket if we really need to.
885
461
if self.server_address[0] or self.server_address[1]:
886
462
if not self.server_address[0]:
887
if self.address_family == socket.AF_INET6:
888
any_address = "::" # in6addr_any
889
else:
890
any_address = socket.INADDR_ANY
891
self.server_address = (any_address,
463
in6addr_any = "::"
464
self.server_address = (in6addr_any,
892
465
self.server_address[1])
893
elif not self.server_address[1]:
466
elif self.server_address[1] is None:
894
467
self.server_address = (self.server_address[0],
895
468
0)
896
# if self.settings["interface"]:
897
# self.server_address = (self.server_address[0],
898
# 0, # port
899
# 0, # flowinfo
900
# if_nametoindex
901
# (self.settings
902
# ["interface"]))
903
return super(IPv6_TCPServer, self).server_bind()
904
def server_activate(self):
905
if self.enabled:
906
return super(IPv6_TCPServer, self).server_activate()
907
def enable(self):
908
self.enabled = True
909
def handle_ipc(self, source, condition, file_objects={}):
910
condition_names = {
911
gobject.IO_IN: "IN", # There is data to read.
912
gobject.IO_OUT: "OUT", # Data can be written (without
913
# blocking).
914
gobject.IO_PRI: "PRI", # There is urgent data to read.
915
gobject.IO_ERR: "ERR", # Error condition.
916
gobject.IO_HUP: "HUP" # Hung up (the connection has been
917
# broken, usually for pipes and
918
# sockets).
919
}
920
conditions_string = ' | '.join(name
921
for cond, name in
922
condition_names.iteritems()
923
if cond & condition)
924
logger.debug("Handling IPC: FD = %d, condition = %s", source,
925
conditions_string)
926
927
# Turn the pipe file descriptor into a Python file object
928
if source not in file_objects:
929
file_objects[source] = os.fdopen(source, "r", 1)
930
931
# Read a line from the file object
932
cmdline = file_objects[source].readline()
933
if not cmdline: # Empty line means end of file
934
# close the IPC pipe
935
file_objects[source].close()
936
del file_objects[source]
937
938
# Stop calling this function
939
return False
940
941
logger.debug("IPC command: %r\n" % cmdline)
942
943
# Parse and act on command
944
cmd, args = cmdline.split(None, 1)
945
if cmd == "NOTFOUND":
946
if self.settings["use_dbus"]:
947
# Emit D-Bus signal
948
mandos_dbus_service.ClientNotFound(args)
949
elif cmd == "INVALID":
950
if self.settings["use_dbus"]:
951
for client in self.clients:
952
if client.name == args:
953
# Emit D-Bus signal
954
client.Rejected()
955
break
956
elif cmd == "SENDING":
957
for client in self.clients:
958
if client.name == args:
959
client.checked_ok()
960
if self.settings["use_dbus"]:
961
# Emit D-Bus signal
962
client.ReceivedSecret()
963
break
964
else:
965
logger.error("Unknown IPC command: %r", cmdline)
966
967
# Keep calling this function
968
return True
469
return super(type(self), self).server_bind()
969
470
970
471
971
472
def string_to_delta(interval):
972
473
"""Parse a string and return a datetime.timedelta
973
474
974
475
>>> string_to_delta('7d')
975
476
datetime.timedelta(7)
976
477
>>> string_to_delta('60s')
981
482
datetime.timedelta(1)
982
483
>>> string_to_delta(u'1w')
983
484
datetime.timedelta(7)
984
>>> string_to_delta('5m 30s')
985
datetime.timedelta(0, 330)
986
485
"""
987
timevalue = datetime.timedelta(0)
988
for s in interval.split():
989
try:
990
suffix = unicode(s[-1])
991
value = int(s[:-1])
992
if suffix == u"d":
993
delta = datetime.timedelta(value)
994
elif suffix == u"s":
995
delta = datetime.timedelta(0, value)
996
elif suffix == u"m":
997
delta = datetime.timedelta(0, 0, 0, 0, value)
998
elif suffix == u"h":
999
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1000
elif suffix == u"w":
1001
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1002
else:
1003
raise ValueError
1004
except (ValueError, IndexError):
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:
1005
500
raise ValueError
1006
timevalue += delta
1007
return timevalue
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()
1008
537
1009
538
1010
539
def server_state_changed(state):
1011
540
"""Derived from the Avahi example code"""
1012
541
if state == avahi.SERVER_COLLISION:
1013
logger.error(u"Zeroconf server name collision")
1014
service.remove()
542
logger.warning(u"Server name collision")
543
remove_service()
1015
544
elif state == avahi.SERVER_RUNNING:
1016
service.add()
545
add_service()
1017
546
1018
547
1019
548
def entry_group_state_changed(state, error):
1020
549
"""Derived from the Avahi example code"""
1021
logger.debug(u"Avahi state change: %i", state)
550
global serviceName, server, rename_count
551
552
logger.debug(u"state change: %i", state)
1022
553
1023
554
if state == avahi.ENTRY_GROUP_ESTABLISHED:
1024
logger.debug(u"Zeroconf service established.")
555
logger.debug(u"Service established.")
1025
556
elif state == avahi.ENTRY_GROUP_COLLISION:
1026
logger.warning(u"Zeroconf service name collision.")
1027
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)
1028
570
elif state == avahi.ENTRY_GROUP_FAILURE:
1029
logger.critical(u"Avahi: Error in group state changed %s",
1030
unicode(error))
1031
raise AvahiGroupError(u"State changed: %s" % unicode(error))
571
logger.error(u"Error in group state changed %s",
572
unicode(error))
573
killme(1)
574
1032
575
1033
576
def if_nametoindex(interface):
1034
"""Call the C function if_nametoindex(), or equivalent"""
1035
global if_nametoindex
577
"""Call the C function if_nametoindex()"""
1036
578
try:
1037
if_nametoindex = (ctypes.cdll.LoadLibrary
1038
(ctypes.util.find_library("c"))
1039
.if_nametoindex)
579
libc = ctypes.cdll.LoadLibrary("libc.so.6")
580
return libc.if_nametoindex(interface)
1040
581
except (OSError, AttributeError):
1041
582
if "struct" not in sys.modules:
1042
583
import struct
1043
584
if "fcntl" not in sys.modules:
1044
585
import fcntl
1045
def if_nametoindex(interface):
1046
"Get an interface index the hard way, i.e. using fcntl()"
1047
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1048
with closing(socket.socket()) as s:
1049
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1050
struct.pack("16s16x", interface))
1051
interface_index = struct.unpack("I", ifreq[16:20])[0]
1052
return interface_index
1053
return if_nametoindex(interface)
1054
1055
1056
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):
1057
596
"""See daemon(3). Standard BSD Unix function.
1058
597
This should really exist as os.daemon, but it doesn't (yet)."""
1059
598
if os.fork():
1061
600
os.setsid()
1062
601
if not nochdir:
1063
602
os.chdir("/")
1064
if os.fork():
1065
sys.exit()
1066
603
if not noclose:
1067
604
# Close all standard open file descriptors
1068
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
605
null = os.open("/dev/null", os.O_NOCTTY | os.O_RDWR)
1069
606
if not stat.S_ISCHR(os.fstat(null).st_mode):
1070
607
raise OSError(errno.ENODEV,
1071
608
"/dev/null not a character device")
1076
613
os.close(null)
1077
614
1078
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
1079
625
def main():
1080
1081
######################################################################
1082
# Parsing of options, both command line and config file
1083
1084
parser = optparse.OptionParser(version = "%%prog %s" % version)
626
global exitstatus
627
exitstatus = 0
628
global main_loop_started
629
main_loop_started = False
630
631
parser = OptionParser()
1085
632
parser.add_option("-i", "--interface", type="string",
1086
metavar="IF", help="Bind to interface IF")
1087
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,
1088
636
help="Address to listen for requests on")
1089
parser.add_option("-p", "--port", type="int",
637
parser.add_option("-p", "--port", type="int", default=None,
1090
638
help="Port number to receive requests on")
1091
parser.add_option("--check", action="store_true",
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
parser.add_option("--check", action="store_true", default=False,
1092
646
help="Run self-test")
1093
parser.add_option("--debug", action="store_true",
1094
help="Debug mode; run in foreground and log to"
1095
" terminal")
1096
parser.add_option("--priority", type="string", help="GnuTLS"
1097
" priority string (see GnuTLS documentation)")
1098
parser.add_option("--servicename", type="string", metavar="NAME",
1099
help="Zeroconf service name")
1100
parser.add_option("--configdir", type="string",
1101
default="/etc/mandos", metavar="DIR",
1102
help="Directory to search for configuration"
1103
" files")
1104
parser.add_option("--no-dbus", action="store_false",
1105
dest="use_dbus",
1106
help="Do not provide D-Bus system bus"
1107
" interface")
1108
parser.add_option("--no-ipv6", action="store_false",
1109
dest="use_ipv6", help="Do not use IPv6")
1110
options = parser.parse_args()[0]
647
parser.add_option("--debug", action="store_true", default=False,
648
help="Debug mode")
649
(options, args) = parser.parse_args()
1111
650
1112
651
if options.check:
1113
652
import doctest
1114
653
doctest.testmod()
1115
654
sys.exit()
1116
655
1117
# Default values for config file for server-global settings
1118
server_defaults = { "interface": "",
1119
"address": "",
1120
"port": "",
1121
"debug": "False",
1122
"priority":
1123
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1124
"servicename": "Mandos",
1125
"use_dbus": "True",
1126
"use_ipv6": "True",
1127
}
1128
1129
# Parse config file for server-global settings
1130
server_config = ConfigParser.SafeConfigParser(server_defaults)
1131
del server_defaults
1132
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1133
# Convert the SafeConfigParser object to a dict
1134
server_settings = server_config.defaults()
1135
# Use the appropriate methods on the non-string config options
1136
server_settings["debug"] = server_config.getboolean("DEFAULT",
1137
"debug")
1138
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
1139
"use_dbus")
1140
server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
1141
"use_ipv6")
1142
if server_settings["port"]:
1143
server_settings["port"] = server_config.getint("DEFAULT",
1144
"port")
1145
del server_config
1146
1147
# Override the settings from the config file with command line
1148
# options, if set.
1149
for option in ("interface", "address", "port", "debug",
1150
"priority", "servicename", "configdir",
1151
"use_dbus", "use_ipv6"):
1152
value = getattr(options, option)
1153
if value is not None:
1154
server_settings[option] = value
1155
del options
1156
# Now we have our good server settings in "server_settings"
1157
1158
##################################################################
1159
1160
# For convenience
1161
debug = server_settings["debug"]
1162
use_dbus = server_settings["use_dbus"]
1163
use_ipv6 = server_settings["use_ipv6"]
1164
1165
if not debug:
1166
syslogger.setLevel(logging.WARNING)
1167
console.setLevel(logging.WARNING)
1168
1169
if server_settings["servicename"] != "Mandos":
1170
syslogger.setFormatter(logging.Formatter
1171
('Mandos (%s) [%%(process)d]:'
1172
' %%(levelname)s: %%(message)s'
1173
% server_settings["servicename"]))
1174
1175
# Parse config file with clients
1176
client_defaults = { "timeout": "1h",
1177
"interval": "5m",
1178
"checker": "fping -q -- %%(host)s",
1179
"host": "",
1180
}
1181
client_config = ConfigParser.SafeConfigParser(client_defaults)
1182
client_config.read(os.path.join(server_settings["configdir"],
1183
"clients.conf"))
1184
1185
global mandos_dbus_service
1186
mandos_dbus_service = None
1187
1188
clients = Set()
1189
tcp_server = IPv6_TCPServer((server_settings["address"],
1190
server_settings["port"]),
1191
TCP_handler,
1192
settings=server_settings,
1193
clients=clients, use_ipv6=use_ipv6)
1194
pidfilename = "/var/run/mandos.pid"
1195
try:
1196
pidfile = open(pidfilename, "w")
1197
except IOError:
1198
logger.error("Could not open file %r", pidfilename)
1199
1200
try:
1201
uid = pwd.getpwnam("_mandos").pw_uid
1202
gid = pwd.getpwnam("_mandos").pw_gid
1203
except KeyError:
1204
try:
1205
uid = pwd.getpwnam("mandos").pw_uid
1206
gid = pwd.getpwnam("mandos").pw_gid
1207
except KeyError:
1208
try:
1209
uid = pwd.getpwnam("nobody").pw_uid
1210
gid = pwd.getpwnam("nogroup").pw_gid
1211
except KeyError:
1212
uid = 65534
1213
gid = 65534
1214
try:
1215
os.setgid(gid)
1216
os.setuid(uid)
1217
except OSError, error:
1218
if error[0] != errno.EPERM:
1219
raise error
1220
1221
# Enable all possible GnuTLS debugging
1222
if debug:
1223
# "Use a log level over 10 to enable all debugging options."
1224
# - GnuTLS manual
1225
gnutls.library.functions.gnutls_global_set_log_level(11)
1226
1227
@gnutls.library.types.gnutls_log_func
1228
def debug_gnutls(level, string):
1229
logger.debug("GnuTLS: %s", string[:-1])
1230
1231
(gnutls.library.functions
1232
.gnutls_global_set_log_function(debug_gnutls))
1233
1234
global service
1235
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1236
service = AvahiService(name = server_settings["servicename"],
1237
servicetype = "_mandos._tcp",
1238
protocol = protocol)
1239
if server_settings["interface"]:
1240
service.interface = (if_nametoindex
1241
(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")
1242
671
1243
672
global main_loop
1244
673
global bus
1247
676
DBusGMainLoop(set_as_default=True )
1248
677
main_loop = gobject.MainLoop()
1249
678
bus = dbus.SystemBus()
1250
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1251
avahi.DBUS_PATH_SERVER),
1252
avahi.DBUS_INTERFACE_SERVER)
679
server = dbus.Interface(
680
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
681
avahi.DBUS_INTERFACE_SERVER )
1253
682
# End of Avahi example code
1254
if use_dbus:
1255
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1256
683
1257
client_class = Client
1258
if use_dbus:
1259
client_class = ClientDBus
1260
clients.update(Set(
1261
client_class(name = section,
1262
config= dict(client_config.items(section)))
1263
for section in client_config.sections()))
1264
if not clients:
1265
logger.warning(u"No clients defined")
684
debug = options.debug
1266
685
1267
686
if debug:
1268
# Redirect stdin so all checkers get /dev/null
1269
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1270
os.dup2(null, sys.stdin.fileno())
1271
if null > 2:
1272
os.close(null)
1273
else:
1274
# No console logging
1275
logger.removeHandler(console)
1276
# Close all input and output, do double fork, etc.
1277
daemon()
1278
1279
try:
1280
with closing(pidfile):
1281
pid = os.getpid()
1282
pidfile.write(str(pid) + "\n")
1283
del pidfile
1284
except IOError:
1285
logger.error(u"Could not write to file %r with PID %d",
1286
pidfilename, pid)
1287
except NameError:
1288
# "pidfile" was never created
1289
pass
1290
del pidfilename
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
def remove_from_clients(client):
696
clients.remove(client)
697
if not clients:
698
logger.debug(u"No clients left, exiting")
699
killme()
700
701
clients.update(Set(Client(name=section, options=options,
702
stop_hook = remove_from_clients,
703
**(dict(client_config\
704
.items(section))))
705
for section in client_config.sections()))
706
707
if not debug:
708
daemon(False, False)
1291
709
1292
710
def cleanup():
1293
711
"Cleanup function; run on exit"
1300
718
1301
719
while clients:
1302
720
client = clients.pop()
1303
client.disable_hook = None
1304
client.disable()
721
client.stop_hook = None
722
client.stop()
1305
723
1306
724
atexit.register(cleanup)
1307
725
1308
726
if not debug:
1309
727
signal.signal(signal.SIGINT, signal.SIG_IGN)
1310
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1311
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1312
1313
if use_dbus:
1314
class MandosDBusService(dbus.service.Object):
1315
"""A D-Bus proxy object"""
1316
def __init__(self):
1317
dbus.service.Object.__init__(self, bus, "/")
1318
_interface = u"se.bsnet.fukt.Mandos"
1319
1320
@dbus.service.signal(_interface, signature="oa{sv}")
1321
def ClientAdded(self, objpath, properties):
1322
"D-Bus signal"
1323
pass
1324
1325
@dbus.service.signal(_interface, signature="s")
1326
def ClientNotFound(self, fingerprint):
1327
"D-Bus signal"
1328
pass
1329
1330
@dbus.service.signal(_interface, signature="os")
1331
def ClientRemoved(self, objpath, name):
1332
"D-Bus signal"
1333
pass
1334
1335
@dbus.service.method(_interface, out_signature="ao")
1336
def GetAllClients(self):
1337
"D-Bus method"
1338
return dbus.Array(c.dbus_object_path for c in clients)
1339
1340
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1341
def GetAllClientsWithProperties(self):
1342
"D-Bus method"
1343
return dbus.Dictionary(
1344
((c.dbus_object_path, c.GetAllProperties())
1345
for c in clients),
1346
signature="oa{sv}")
1347
1348
@dbus.service.method(_interface, in_signature="o")
1349
def RemoveClient(self, object_path):
1350
"D-Bus method"
1351
for c in clients:
1352
if c.dbus_object_path == object_path:
1353
clients.remove(c)
1354
c.remove_from_connection()
1355
# Don't signal anything except ClientRemoved
1356
c.disable(signal=False)
1357
# Emit D-Bus signal
1358
self.ClientRemoved(object_path, c.name)
1359
return
1360
raise KeyError
1361
1362
del _interface
1363
1364
mandos_dbus_service = MandosDBusService()
728
signal.signal(signal.SIGHUP, lambda signum, frame: killme())
729
signal.signal(signal.SIGTERM, lambda signum, frame: killme())
1365
730
1366
731
for client in clients:
1367
if use_dbus:
1368
# Emit D-Bus signal
1369
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1370
client.GetAllProperties())
1371
client.enable()
1372
1373
tcp_server.enable()
1374
tcp_server.server_activate()
1375
1376
# Find out what port we got
1377
service.port = tcp_server.socket.getsockname()[1]
1378
if use_ipv6:
1379
logger.info(u"Now listening on address %r, port %d,"
1380
" flowinfo %d, scope_id %d"
1381
% tcp_server.socket.getsockname())
1382
else: # IPv4
1383
logger.info(u"Now listening on address %r, port %d"
1384
% tcp_server.socket.getsockname())
1385
1386
#service.interface = tcp_server.socket.getsockname()[3]
1387
1388
try:
1389
# From the Avahi example code
1390
server.connect_to_signal("StateChanged", server_state_changed)
1391
try:
1392
server_state_changed(server.GetState())
1393
except dbus.exceptions.DBusException, error:
1394
logger.critical(u"DBusException: %s", error)
1395
sys.exit(1)
1396
# End of Avahi example code
1397
1398
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1399
lambda *args, **kwargs:
1400
(tcp_server.handle_request
1401
(*args[2:], **kwargs) or True))
1402
1403
logger.debug(u"Starting main loop")
732
client.start()
733
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")
762
main_loop_started = True
1404
763
main_loop.run()
1405
except AvahiError, error:
1406
logger.critical(u"AvahiError: %s", error)
1407
sys.exit(1)
1408
764
except KeyboardInterrupt:
1409
765
if debug:
1410
print >> sys.stderr
1411
logger.debug("Server received KeyboardInterrupt")
1412
logger.debug("Server exiting")
766
print
767
768
sys.exit(exitstatus)
1413
769
1414
770
if __name__ == '__main__':
1415
771
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0