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- Committer: Teddy Hogeborn
- Date: 2009-02-14 18:07:05 UTC
- Revision ID: teddy@fukt.bsnet.se-20090214180705-vu6b7j4i2v2hibgg
Use "getconf" to get correct LFS compile and link flags.
* Makefile (GPGME_CFLAGS): Added output of "getconf LFS_CFLAGS".
(GPGME_LIBS): Added output of "getconf LFS_LIBS" and
"getconf LFS_LDFLAGS".
* plugins.d/mandos-client.c: Only define "_LARGEFILE_SOURCE" and
"_FILE_OFFSET_BITS" if they are not
already defined.
* Makefile (GPGME_CFLAGS): Added output of "getconf LFS_CFLAGS".
(GPGME_LIBS): Added output of "getconf LFS_LIBS" and
"getconf LFS_LDFLAGS".
* plugins.d/mandos-client.c: Only define "_LARGEFILE_SOURCE" and
"_FILE_OFFSET_BITS" if they are not
already defined.
- files added:
- .bzr-builddeb
- debian
- debian/po
- 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
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# following functions: "add_service", "remove_service",
10
# "server_state_changed", "entry_group_state_changed", and some lines
11
# in "main".
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
12
#
13
# Everything else is Copyright © 2007-2008 Teddy Hogeborn and Björn
14
# Påhlsson.
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# Everything else is
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# Copyright © 2008,2009 Teddy Hogeborn
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# Copyright © 2008,2009 Björn Påhlsson
15
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#
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# This program is free software: you can redistribute it and/or modify
17
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# it under the terms of the GNU General Public License as published by
24
25
# GNU General Public License for more details.
25
26
#
26
27
# You should have received a copy of the GNU General Public License
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
28
30
#
29
# Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
30
# <https://www.fukt.bsnet.se/~teddy/>.
31
# Contact the authors at <mandos@fukt.bsnet.se>.
31
32
#
32
33
33
from __future__ import division
34
from __future__ import division, with_statement, absolute_import
34
35
35
36
import SocketServer
36
37
import socket
37
import select
38
from optparse import OptionParser
38
import optparse
39
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import datetime
40
40
import errno
41
41
import gnutls.crypto
55
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import stat
56
56
import logging
57
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import logging.handlers
58
import pwd
59
from contextlib import closing
58
60
59
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import dbus
62
import dbus.service
60
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import gobject
61
64
import avahi
62
65
from dbus.mainloop.glib import DBusGMainLoop
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66
import ctypes
64
65
# Brief description of the operation of this program:
66
#
67
# This server announces itself as a Zeroconf service. Connecting
68
# clients use the TLS protocol, with the unusual quirk that this
69
# server program acts as a TLS "client" while the connecting clients
70
# acts as a TLS "server". The clients (acting as a TLS "server") must
71
# supply an OpenPGP certificate, and the fingerprint of this
72
# certificate is used by this server to look up (in a list read from a
73
# file at start time) which binary blob to give the client. No other
74
# authentication or authorization is done by this server.
75
67
import ctypes.util
68
69
version = "1.0.6"
76
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logger = logging.Logger('mandos')
78
syslogger = logging.handlers.SysLogHandler\
79
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
80
syslogger.setFormatter(logging.Formatter\
81
('%(levelname)s: %(message)s'))
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'))
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logger.addHandler(syslogger)
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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
79
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console = logging.StreamHandler()
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
83
logger.addHandler(console)
84
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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
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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
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self.port = port
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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
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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): %%(levelname)s:'
141
' %%(message)s' % self.name))
142
self.remove()
143
self.add()
144
self.rename_count += 1
145
def remove(self):
146
"""Derived from the Avahi example code"""
147
if group is not None:
148
group.Reset()
149
def add(self):
150
"""Derived from the Avahi example code"""
151
global group
152
if group is None:
153
group = dbus.Interface(bus.get_object
154
(avahi.DBUS_NAME,
155
server.EntryGroupNew()),
156
avahi.DBUS_INTERFACE_ENTRY_GROUP)
157
group.connect_to_signal('StateChanged',
158
entry_group_state_changed)
159
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
160
service.name, service.type)
161
group.AddService(
162
self.interface, # interface
163
self.protocol, # protocol
164
dbus.UInt32(0), # flags
165
self.name, self.type,
166
self.domain, self.host,
167
dbus.UInt16(self.port),
168
avahi.string_array_to_txt_array(self.TXT))
169
group.Commit()
170
89
171
# 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
172
group = None # our entry group
99
173
# End of Avahi example code
100
174
101
175
102
class Client(object):
176
def _datetime_to_dbus(dt, variant_level=0):
177
"""Convert a UTC datetime.datetime() to a D-Bus type."""
178
return dbus.String(dt.isoformat(), variant_level=variant_level)
179
180
181
class Client(dbus.service.Object):
103
182
"""A representation of a client host served by this server.
104
183
Attributes:
105
name: string; from the config file, used in log messages
184
name: string; from the config file, used in log messages and
185
D-Bus identifiers
106
186
fingerprint: string (40 or 32 hexadecimal digits); used to
107
187
uniquely identify the client
108
secret: bytestring; sent verbatim (over TLS) to client
109
fqdn: string (FQDN); available for use by the checker command
110
created: datetime.datetime()
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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.
188
secret: bytestring; sent verbatim (over TLS) to client
189
host: string; available for use by the checker command
190
created: datetime.datetime(); (UTC) object creation
191
last_enabled: datetime.datetime(); (UTC)
192
enabled: bool()
193
last_checked_ok: datetime.datetime(); (UTC) or None
194
timeout: datetime.timedelta(); How long from last_checked_ok
195
until this client is invalid
196
interval: datetime.timedelta(); How often to start a new checker
197
disable_hook: If set, called by disable() as disable_hook(self)
198
checker: subprocess.Popen(); a running checker process used
199
to see if the client lives.
200
'None' if no process is running.
119
201
checker_initiator_tag: a gobject event source tag, or None
120
stop_initiator_tag: - '' -
202
disable_initiator_tag: - '' -
121
203
checker_callback_tag: - '' -
122
204
checker_command: string; External command which is run to check if
123
client lives. %()s expansions are done at
205
client lives. %() expansions are done at
124
206
runtime with vars(self) as dict, so that for
125
207
instance %(name)s can be used in the 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: - '' -
208
current_checker_command: string; current running checker_command
209
use_dbus: bool(); Whether to provide D-Bus interface and signals
210
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
131
211
"""
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.."""
212
def timeout_milliseconds(self):
213
"Return the 'timeout' attribute in milliseconds"
214
return ((self.timeout.days * 24 * 60 * 60 * 1000)
215
+ (self.timeout.seconds * 1000)
216
+ (self.timeout.microseconds // 1000))
217
218
def interval_milliseconds(self):
219
"Return the 'interval' attribute in milliseconds"
220
return ((self.interval.days * 24 * 60 * 60 * 1000)
221
+ (self.interval.seconds * 1000)
222
+ (self.interval.microseconds // 1000))
223
224
def __init__(self, name = None, disable_hook=None, config=None,
225
use_dbus=True):
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)
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
230
if config is None:
231
config = {}
232
logger.debug(u"Creating client %r", self.name)
233
self.use_dbus = False # During __init__
234
# Uppercase and remove spaces from fingerprint for later
235
# comparison purposes with return value from the fingerprint()
236
# function
237
self.fingerprint = (config["fingerprint"].upper()
238
.replace(u" ", u""))
239
logger.debug(u" Fingerprint: %s", self.fingerprint)
240
if "secret" in config:
241
self.secret = config["secret"].decode(u"base64")
242
elif "secfile" in config:
243
with closing(open(os.path.expanduser
244
(os.path.expandvars
245
(config["secfile"])))) as secfile:
246
self.secret = secfile.read()
247
else:
248
raise TypeError(u"No secret or secfile for client %s"
249
% self.name)
250
self.host = config.get("host", "")
251
self.created = datetime.datetime.utcnow()
252
self.enabled = False
253
self.last_enabled = None
254
self.last_checked_ok = None
255
self.timeout = string_to_delta(config["timeout"])
256
self.interval = string_to_delta(config["interval"])
257
self.disable_hook = disable_hook
186
258
self.checker = None
187
259
self.checker_initiator_tag = None
188
self.stop_initiator_tag = None
260
self.disable_initiator_tag = None
189
261
self.checker_callback_tag = None
190
self.check_command = checker
191
def start(self):
262
self.checker_command = config["checker"]
263
self.current_checker_command = None
264
self.last_connect = None
265
# Only now, when this client is initialized, can it show up on
266
# the D-Bus
267
self.use_dbus = use_dbus
268
if self.use_dbus:
269
self.dbus_object_path = (dbus.ObjectPath
270
("/clients/"
271
+ self.name.replace(".", "_")))
272
dbus.service.Object.__init__(self, bus,
273
self.dbus_object_path)
274
275
def enable(self):
192
276
"""Start this client's checker and timeout hooks"""
277
self.last_enabled = datetime.datetime.utcnow()
193
278
# Schedule a new checker to be started an 'interval' from now,
194
279
# and every interval from then on.
195
self.checker_initiator_tag = gobject.timeout_add\
196
(self._interval_milliseconds,
197
self.start_checker)
280
self.checker_initiator_tag = (gobject.timeout_add
281
(self.interval_milliseconds(),
282
self.start_checker))
198
283
# Also start a new checker *right now*.
199
284
self.start_checker()
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:
285
# Schedule a disable() when 'timeout' has passed
286
self.disable_initiator_tag = (gobject.timeout_add
287
(self.timeout_milliseconds(),
288
self.disable))
289
self.enabled = True
290
if self.use_dbus:
291
# Emit D-Bus signals
292
self.PropertyChanged(dbus.String(u"enabled"),
293
dbus.Boolean(True, variant_level=1))
294
self.PropertyChanged(dbus.String(u"last_enabled"),
295
(_datetime_to_dbus(self.last_enabled,
296
variant_level=1)))
297
298
def disable(self):
299
"""Disable this client."""
300
if not getattr(self, "enabled", False):
213
301
return 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:
302
logger.info(u"Disabling client %s", self.name)
303
if getattr(self, "disable_initiator_tag", False):
304
gobject.source_remove(self.disable_initiator_tag)
305
self.disable_initiator_tag = None
306
if getattr(self, "checker_initiator_tag", False):
220
307
gobject.source_remove(self.checker_initiator_tag)
221
308
self.checker_initiator_tag = None
222
309
self.stop_checker()
223
if self.stop_hook:
224
self.stop_hook(self)
310
if self.disable_hook:
311
self.disable_hook(self)
312
self.enabled = False
313
if self.use_dbus:
314
# Emit D-Bus signal
315
self.PropertyChanged(dbus.String(u"enabled"),
316
dbus.Boolean(False, variant_level=1))
225
317
# Do not run this again if called by a gobject.timeout_add
226
318
return False
319
227
320
def __del__(self):
228
self.stop_hook = None
229
self.stop()
230
def checker_callback(self, pid, condition):
321
self.disable_hook = None
322
self.disable()
323
324
def checker_callback(self, pid, condition, command):
231
325
"""The checker has completed, so take appropriate actions."""
232
now = datetime.datetime.now()
233
326
self.checker_callback_tag = None
234
327
self.checker = None
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):
328
if self.use_dbus:
329
# Emit D-Bus signal
330
self.PropertyChanged(dbus.String(u"checker_running"),
331
dbus.Boolean(False, variant_level=1))
332
if os.WIFEXITED(condition):
333
exitstatus = os.WEXITSTATUS(condition)
334
if exitstatus == 0:
335
logger.info(u"Checker for %(name)s succeeded",
336
vars(self))
337
self.checked_ok()
338
else:
339
logger.info(u"Checker for %(name)s failed",
340
vars(self))
341
if self.use_dbus:
342
# Emit D-Bus signal
343
self.CheckerCompleted(dbus.Int16(exitstatus),
344
dbus.Int64(condition),
345
dbus.String(command))
346
else:
245
347
logger.warning(u"Checker for %(name)s crashed?",
246
348
vars(self))
247
else:
248
logger.debug(u"Checker for %(name)s failed",
249
vars(self))
349
if self.use_dbus:
350
# Emit D-Bus signal
351
self.CheckerCompleted(dbus.Int16(-1),
352
dbus.Int64(condition),
353
dbus.String(command))
354
355
def checked_ok(self):
356
"""Bump up the timeout for this client.
357
This should only be called when the client has been seen,
358
alive and well.
359
"""
360
self.last_checked_ok = datetime.datetime.utcnow()
361
gobject.source_remove(self.disable_initiator_tag)
362
self.disable_initiator_tag = (gobject.timeout_add
363
(self.timeout_milliseconds(),
364
self.disable))
365
if self.use_dbus:
366
# Emit D-Bus signal
367
self.PropertyChanged(
368
dbus.String(u"last_checked_ok"),
369
(_datetime_to_dbus(self.last_checked_ok,
370
variant_level=1)))
371
250
372
def start_checker(self):
251
373
"""Start a new checker subprocess if one is not running.
252
374
If a checker already exists, leave it running and do
259
381
# checkers alone, the checker would have to take more time
260
382
# than 'timeout' for the client to be declared invalid, which
261
383
# is as it should be.
384
385
# If a checker exists, make sure it is not a zombie
386
if self.checker is not None:
387
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
388
if pid:
389
logger.warning("Checker was a zombie")
390
gobject.source_remove(self.checker_callback_tag)
391
self.checker_callback(pid, status,
392
self.current_checker_command)
393
# Start a new checker if needed
262
394
if self.checker is None:
263
395
try:
264
command = self.check_command % self.fqdn
396
# In case checker_command has exactly one % operator
397
command = self.checker_command % self.host
265
398
except TypeError:
399
# Escape attributes for the shell
266
400
escaped_attrs = dict((key, re.escape(str(val)))
267
401
for key, val in
268
402
vars(self).iteritems())
269
403
try:
270
command = self.check_command % escaped_attrs
404
command = self.checker_command % escaped_attrs
271
405
except TypeError, error:
272
logger.critical(u'Could not format string "%s":'
273
u' %s', self.check_command, error)
406
logger.error(u'Could not format string "%s":'
407
u' %s', self.checker_command, error)
274
408
return True # Try again later
409
self.current_checker_command = command
275
410
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="/")
282
self.checker_callback_tag = gobject.child_watch_add\
283
(self.checker.pid,
284
self.checker_callback)
285
except subprocess.OSError, error:
411
logger.info(u"Starting checker %r for %s",
412
command, self.name)
413
# We don't need to redirect stdout and stderr, since
414
# in normal mode, that is already done by daemon(),
415
# and in debug mode we don't want to. (Stdin is
416
# always replaced by /dev/null.)
417
self.checker = subprocess.Popen(command,
418
close_fds=True,
419
shell=True, cwd="/")
420
if self.use_dbus:
421
# Emit D-Bus signal
422
self.CheckerStarted(command)
423
self.PropertyChanged(
424
dbus.String("checker_running"),
425
dbus.Boolean(True, variant_level=1))
426
self.checker_callback_tag = (gobject.child_watch_add
427
(self.checker.pid,
428
self.checker_callback,
429
data=command))
430
# The checker may have completed before the gobject
431
# watch was added. Check for this.
432
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
433
if pid:
434
gobject.source_remove(self.checker_callback_tag)
435
self.checker_callback(pid, status, command)
436
except OSError, error:
286
437
logger.error(u"Failed to start subprocess: %s",
287
438
error)
288
439
# Re-run this periodically if run by gobject.timeout_add
289
440
return True
441
290
442
def stop_checker(self):
291
443
"""Force the checker process, if any, to stop."""
292
444
if self.checker_callback_tag:
293
445
gobject.source_remove(self.checker_callback_tag)
294
446
self.checker_callback_tag = None
295
if not hasattr(self, "checker") or self.checker is None:
447
if getattr(self, "checker", None) is None:
296
448
return
297
logger.debug("Stopping checker for %(name)s", vars(self))
449
logger.debug(u"Stopping checker for %(name)s", vars(self))
298
450
try:
299
451
os.kill(self.checker.pid, signal.SIGTERM)
300
452
#os.sleep(0.5)
301
453
#if self.checker.poll() is None:
302
454
# os.kill(self.checker.pid, signal.SIGKILL)
303
455
except OSError, error:
304
if error.errno != errno.ESRCH:
456
if error.errno != errno.ESRCH: # No such process
305
457
raise
306
458
self.checker = None
307
def still_valid(self, now=None):
459
if self.use_dbus:
460
self.PropertyChanged(dbus.String(u"checker_running"),
461
dbus.Boolean(False, variant_level=1))
462
463
def still_valid(self):
308
464
"""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:
465
if not getattr(self, "enabled", False):
466
return False
467
now = datetime.datetime.utcnow()
468
if self.last_checked_ok is None:
312
469
return now < (self.created + self.timeout)
313
470
else:
314
return now < (self.last_seen + self.timeout)
471
return now < (self.last_checked_ok + self.timeout)
472
473
## D-Bus methods & signals
474
_interface = u"se.bsnet.fukt.Mandos.Client"
475
476
# CheckedOK - method
477
CheckedOK = dbus.service.method(_interface)(checked_ok)
478
CheckedOK.__name__ = "CheckedOK"
479
480
# CheckerCompleted - signal
481
@dbus.service.signal(_interface, signature="nxs")
482
def CheckerCompleted(self, exitcode, waitstatus, command):
483
"D-Bus signal"
484
pass
485
486
# CheckerStarted - signal
487
@dbus.service.signal(_interface, signature="s")
488
def CheckerStarted(self, command):
489
"D-Bus signal"
490
pass
491
492
# GetAllProperties - method
493
@dbus.service.method(_interface, out_signature="a{sv}")
494
def GetAllProperties(self):
495
"D-Bus method"
496
return dbus.Dictionary({
497
dbus.String("name"):
498
dbus.String(self.name, variant_level=1),
499
dbus.String("fingerprint"):
500
dbus.String(self.fingerprint, variant_level=1),
501
dbus.String("host"):
502
dbus.String(self.host, variant_level=1),
503
dbus.String("created"):
504
_datetime_to_dbus(self.created, variant_level=1),
505
dbus.String("last_enabled"):
506
(_datetime_to_dbus(self.last_enabled,
507
variant_level=1)
508
if self.last_enabled is not None
509
else dbus.Boolean(False, variant_level=1)),
510
dbus.String("enabled"):
511
dbus.Boolean(self.enabled, variant_level=1),
512
dbus.String("last_checked_ok"):
513
(_datetime_to_dbus(self.last_checked_ok,
514
variant_level=1)
515
if self.last_checked_ok is not None
516
else dbus.Boolean (False, variant_level=1)),
517
dbus.String("timeout"):
518
dbus.UInt64(self.timeout_milliseconds(),
519
variant_level=1),
520
dbus.String("interval"):
521
dbus.UInt64(self.interval_milliseconds(),
522
variant_level=1),
523
dbus.String("checker"):
524
dbus.String(self.checker_command,
525
variant_level=1),
526
dbus.String("checker_running"):
527
dbus.Boolean(self.checker is not None,
528
variant_level=1),
529
dbus.String("object_path"):
530
dbus.ObjectPath(self.dbus_object_path,
531
variant_level=1)
532
}, signature="sv")
533
534
# IsStillValid - method
535
IsStillValid = (dbus.service.method(_interface, out_signature="b")
536
(still_valid))
537
IsStillValid.__name__ = "IsStillValid"
538
539
# PropertyChanged - signal
540
@dbus.service.signal(_interface, signature="sv")
541
def PropertyChanged(self, property, value):
542
"D-Bus signal"
543
pass
544
545
# SetChecker - method
546
@dbus.service.method(_interface, in_signature="s")
547
def SetChecker(self, checker):
548
"D-Bus setter method"
549
self.checker_command = checker
550
# Emit D-Bus signal
551
self.PropertyChanged(dbus.String(u"checker"),
552
dbus.String(self.checker_command,
553
variant_level=1))
554
555
# SetHost - method
556
@dbus.service.method(_interface, in_signature="s")
557
def SetHost(self, host):
558
"D-Bus setter method"
559
self.host = host
560
# Emit D-Bus signal
561
self.PropertyChanged(dbus.String(u"host"),
562
dbus.String(self.host, variant_level=1))
563
564
# SetInterval - method
565
@dbus.service.method(_interface, in_signature="t")
566
def SetInterval(self, milliseconds):
567
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
568
# Emit D-Bus signal
569
self.PropertyChanged(dbus.String(u"interval"),
570
(dbus.UInt64(self.interval_milliseconds(),
571
variant_level=1)))
572
573
# SetSecret - method
574
@dbus.service.method(_interface, in_signature="ay",
575
byte_arrays=True)
576
def SetSecret(self, secret):
577
"D-Bus setter method"
578
self.secret = str(secret)
579
580
# SetTimeout - method
581
@dbus.service.method(_interface, in_signature="t")
582
def SetTimeout(self, milliseconds):
583
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
584
# Emit D-Bus signal
585
self.PropertyChanged(dbus.String(u"timeout"),
586
(dbus.UInt64(self.timeout_milliseconds(),
587
variant_level=1)))
588
589
# Enable - method
590
Enable = dbus.service.method(_interface)(enable)
591
Enable.__name__ = "Enable"
592
593
# StartChecker - method
594
@dbus.service.method(_interface)
595
def StartChecker(self):
596
"D-Bus method"
597
self.start_checker()
598
599
# Disable - method
600
@dbus.service.method(_interface)
601
def Disable(self):
602
"D-Bus method"
603
self.disable()
604
605
# StopChecker - method
606
StopChecker = dbus.service.method(_interface)(stop_checker)
607
StopChecker.__name__ = "StopChecker"
608
609
del _interface
315
610
316
611
317
612
def peer_certificate(session):
318
613
"Return the peer's OpenPGP certificate as a bytestring"
319
614
# If not an OpenPGP certificate...
320
if gnutls.library.functions.gnutls_certificate_type_get\
321
(session._c_object) \
322
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
615
if (gnutls.library.functions
616
.gnutls_certificate_type_get(session._c_object)
617
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
323
618
# ...do the normal thing
324
619
return session.peer_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))
620
list_size = ctypes.c_uint(1)
621
cert_list = (gnutls.library.functions
622
.gnutls_certificate_get_peers
623
(session._c_object, ctypes.byref(list_size)))
624
if not bool(cert_list) and list_size.value != 0:
625
raise gnutls.errors.GNUTLSError("error getting peer"
626
" certificate")
328
627
if list_size.value == 0:
329
628
return None
330
629
cert = cert_list[0]
333
632
334
633
def fingerprint(openpgp):
335
634
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
635
# New GnuTLS "datum" with the OpenPGP public key
636
datum = (gnutls.library.types
637
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
638
ctypes.POINTER
639
(ctypes.c_ubyte)),
640
ctypes.c_uint(len(openpgp))))
336
641
# New empty GnuTLS certificate
337
642
crt = gnutls.library.types.gnutls_openpgp_crt_t()
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)))
643
(gnutls.library.functions
644
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
345
645
# 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)
646
(gnutls.library.functions
647
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
648
gnutls.library.constants
649
.GNUTLS_OPENPGP_FMT_RAW))
650
# Verify the self signature in the key
651
crtverify = ctypes.c_uint()
652
(gnutls.library.functions
653
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
654
if crtverify.value != 0:
655
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
656
raise gnutls.errors.CertificateSecurityError("Verify failed")
350
657
# New buffer for the fingerprint
351
buffer = ctypes.create_string_buffer(20)
352
buffer_length = ctypes.c_size_t()
658
buf = ctypes.create_string_buffer(20)
659
buf_len = ctypes.c_size_t()
353
660
# Get the fingerprint from the certificate into the buffer
354
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
355
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
661
(gnutls.library.functions
662
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
663
ctypes.byref(buf_len)))
356
664
# Deinit the certificate
357
665
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
358
666
# Convert the buffer to a Python bytestring
359
fpr = ctypes.string_at(buffer, buffer_length.value)
667
fpr = ctypes.string_at(buf, buf_len.value)
360
668
# Convert the bytestring to hexadecimal notation
361
669
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
362
670
return hex_fpr
363
671
364
672
365
class tcp_handler(SocketServer.BaseRequestHandler, object):
673
class TCP_handler(SocketServer.BaseRequestHandler, object):
366
674
"""A TCP request handler class.
367
675
Instantiated by IPv6_TCPServer for each request to handle it.
368
676
Note: This will run in its own forked process."""
369
677
370
678
def handle(self):
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())
679
logger.info(u"TCP connection from: %s",
680
unicode(self.client_address))
681
session = (gnutls.connection
682
.ClientSession(self.request,
683
gnutls.connection
684
.X509Credentials()))
685
686
line = self.request.makefile().readline()
687
logger.debug(u"Protocol version: %r", line)
688
try:
689
if int(line.strip().split()[0]) > 1:
690
raise RuntimeError
691
except (ValueError, IndexError, RuntimeError), error:
692
logger.error(u"Unknown protocol version: %s", error)
693
return
694
695
# Note: gnutls.connection.X509Credentials is really a generic
696
# GnuTLS certificate credentials object so long as no X.509
697
# keys are added to it. Therefore, we can use it here despite
698
# using OpenPGP certificates.
376
699
377
700
#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);
701
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
702
# "+DHE-DSS"))
703
# Use a fallback default, since this MUST be set.
704
priority = self.server.settings.get("priority", "NORMAL")
705
(gnutls.library.functions
706
.gnutls_priority_set_direct(session._c_object,
707
priority, None))
384
708
385
709
try:
386
710
session.handshake()
387
711
except gnutls.errors.GNUTLSError, error:
388
logger.debug(u"Handshake failed: %s", error)
712
logger.warning(u"Handshake failed: %s", error)
389
713
# Do not run session.bye() here: the session is not
390
714
# established. Just abandon the request.
391
715
return
716
logger.debug(u"Handshake succeeded")
392
717
try:
393
718
fpr = fingerprint(peer_certificate(session))
394
719
except (TypeError, gnutls.errors.GNUTLSError), error:
395
logger.debug(u"Bad certificate: %s", error)
720
logger.warning(u"Bad certificate: %s", error)
396
721
session.bye()
397
722
return
398
723
logger.debug(u"Fingerprint: %s", fpr)
399
client = None
724
400
725
for c in self.server.clients:
401
726
if c.fingerprint == fpr:
402
727
client = c
403
728
break
729
else:
730
logger.warning(u"Client not found for fingerprint: %s",
731
fpr)
732
session.bye()
733
return
404
734
# Have to check if client.still_valid(), since it is possible
405
735
# that the client timed out while establishing the GnuTLS
406
736
# 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)
737
if not client.still_valid():
738
logger.warning(u"Client %(name)s is invalid",
739
vars(client))
414
740
session.bye()
415
741
return
742
## This won't work here, since we're in a fork.
743
# client.checked_ok()
416
744
sent_size = 0
417
745
while sent_size < len(client.secret):
418
746
sent = session.send(client.secret[sent_size:])
423
751
session.bye()
424
752
425
753
426
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
427
"""IPv6 TCP server. Accepts 'None' as address and/or port.
754
class IPv6_TCPServer(SocketServer.ForkingMixIn,
755
SocketServer.TCPServer, object):
756
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
428
757
Attributes:
429
options: Command line options
758
settings: Server settings
430
759
clients: Set() of Client objects
760
enabled: Boolean; whether this server is activated yet
431
761
"""
432
762
address_family = socket.AF_INET6
433
763
def __init__(self, *args, **kwargs):
434
if "options" in kwargs:
435
self.options = kwargs["options"]
436
del kwargs["options"]
764
if "settings" in kwargs:
765
self.settings = kwargs["settings"]
766
del kwargs["settings"]
437
767
if "clients" in kwargs:
438
768
self.clients = kwargs["clients"]
439
769
del kwargs["clients"]
440
return super(type(self), self).__init__(*args, **kwargs)
770
if "use_ipv6" in kwargs:
771
if not kwargs["use_ipv6"]:
772
self.address_family = socket.AF_INET
773
del kwargs["use_ipv6"]
774
self.enabled = False
775
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
441
776
def server_bind(self):
442
777
"""This overrides the normal server_bind() function
443
778
to bind to an interface if one was specified, and also NOT to
444
779
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
780
if self.settings["interface"]:
781
# 25 is from /usr/include/asm-i486/socket.h
782
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
449
783
try:
450
784
self.socket.setsockopt(socket.SOL_SOCKET,
451
socket.SO_BINDTODEVICE,
452
self.options.interface)
785
SO_BINDTODEVICE,
786
self.settings["interface"])
453
787
except socket.error, error:
454
788
if error[0] == errno.EPERM:
455
logger.warning(u"No permission to"
456
u" bind to interface %s",
457
self.options.interface)
789
logger.error(u"No permission to"
790
u" bind to interface %s",
791
self.settings["interface"])
458
792
else:
459
raise error
793
raise
460
794
# Only bind(2) the socket if we really need to.
461
795
if self.server_address[0] or self.server_address[1]:
462
796
if not self.server_address[0]:
463
in6addr_any = "::"
464
self.server_address = (in6addr_any,
797
if self.address_family == socket.AF_INET6:
798
any_address = "::" # in6addr_any
799
else:
800
any_address = socket.INADDR_ANY
801
self.server_address = (any_address,
465
802
self.server_address[1])
466
elif self.server_address[1] is None:
803
elif not self.server_address[1]:
467
804
self.server_address = (self.server_address[0],
468
805
0)
469
return super(type(self), self).server_bind()
806
# if self.settings["interface"]:
807
# self.server_address = (self.server_address[0],
808
# 0, # port
809
# 0, # flowinfo
810
# if_nametoindex
811
# (self.settings
812
# ["interface"]))
813
return super(IPv6_TCPServer, self).server_bind()
814
def server_activate(self):
815
if self.enabled:
816
return super(IPv6_TCPServer, self).server_activate()
817
def enable(self):
818
self.enabled = True
470
819
471
820
472
821
def string_to_delta(interval):
473
822
"""Parse a string and return a datetime.timedelta
474
823
475
824
>>> string_to_delta('7d')
476
825
datetime.timedelta(7)
477
826
>>> string_to_delta('60s')
482
831
datetime.timedelta(1)
483
832
>>> string_to_delta(u'1w')
484
833
datetime.timedelta(7)
834
>>> string_to_delta('5m 30s')
835
datetime.timedelta(0, 330)
485
836
"""
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:
837
timevalue = datetime.timedelta(0)
838
for s in interval.split():
839
try:
840
suffix = unicode(s[-1])
841
value = int(s[:-1])
842
if suffix == u"d":
843
delta = datetime.timedelta(value)
844
elif suffix == u"s":
845
delta = datetime.timedelta(0, value)
846
elif suffix == u"m":
847
delta = datetime.timedelta(0, 0, 0, 0, value)
848
elif suffix == u"h":
849
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
850
elif suffix == u"w":
851
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
852
else:
853
raise ValueError
854
except (ValueError, IndexError):
500
855
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()
856
timevalue += delta
857
return timevalue
537
858
538
859
539
860
def server_state_changed(state):
540
861
"""Derived from the Avahi example code"""
541
862
if state == avahi.SERVER_COLLISION:
542
logger.warning(u"Server name collision")
543
remove_service()
863
logger.error(u"Zeroconf server name collision")
864
service.remove()
544
865
elif state == avahi.SERVER_RUNNING:
545
add_service()
866
service.add()
546
867
547
868
548
869
def entry_group_state_changed(state, error):
549
870
"""Derived from the Avahi example code"""
550
global serviceName, server, rename_count
551
552
logger.debug(u"state change: %i", state)
871
logger.debug(u"Avahi state change: %i", state)
553
872
554
873
if state == avahi.ENTRY_GROUP_ESTABLISHED:
555
logger.debug(u"Service established.")
874
logger.debug(u"Zeroconf service established.")
556
875
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)
876
logger.warning(u"Zeroconf service name collision.")
877
service.rename()
570
878
elif state == avahi.ENTRY_GROUP_FAILURE:
571
logger.error(u"Error in group state changed %s",
572
unicode(error))
573
killme(1)
574
879
logger.critical(u"Avahi: Error in group state changed %s",
880
unicode(error))
881
raise AvahiGroupError(u"State changed: %s" % unicode(error))
575
882
576
883
def if_nametoindex(interface):
577
"""Call the C function if_nametoindex()"""
884
"""Call the C function if_nametoindex(), or equivalent"""
885
global if_nametoindex
578
886
try:
579
libc = ctypes.cdll.LoadLibrary("libc.so.6")
580
return libc.if_nametoindex(interface)
887
if_nametoindex = (ctypes.cdll.LoadLibrary
888
(ctypes.util.find_library("c"))
889
.if_nametoindex)
581
890
except (OSError, AttributeError):
582
891
if "struct" not in sys.modules:
583
892
import struct
584
893
if "fcntl" not in sys.modules:
585
894
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):
895
def if_nametoindex(interface):
896
"Get an interface index the hard way, i.e. using fcntl()"
897
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
898
with closing(socket.socket()) as s:
899
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
900
struct.pack("16s16x", interface))
901
interface_index = struct.unpack("I", ifreq[16:20])[0]
902
return interface_index
903
return if_nametoindex(interface)
904
905
906
def daemon(nochdir = False, noclose = False):
596
907
"""See daemon(3). Standard BSD Unix function.
597
908
This should really exist as os.daemon, but it doesn't (yet)."""
598
909
if os.fork():
600
911
os.setsid()
601
912
if not nochdir:
602
913
os.chdir("/")
914
if os.fork():
915
sys.exit()
603
916
if not noclose:
604
917
# Close all standard open file descriptors
605
null = os.open("/dev/null", os.O_NOCTTY | os.O_RDWR)
918
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
606
919
if not stat.S_ISCHR(os.fstat(null).st_mode):
607
920
raise OSError(errno.ENODEV,
608
921
"/dev/null not a character device")
613
926
os.close(null)
614
927
615
928
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
929
def main():
626
global exitstatus
627
exitstatus = 0
628
global main_loop_started
629
main_loop_started = False
630
631
parser = OptionParser()
930
parser = optparse.OptionParser(version = "%%prog %s" % version)
632
931
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,
932
metavar="IF", help="Bind to interface IF")
933
parser.add_option("-a", "--address", type="string",
636
934
help="Address to listen for requests on")
637
parser.add_option("-p", "--port", type="int", default=None,
935
parser.add_option("-p", "--port", type="int",
638
936
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
parser.add_option("--check", action="store_true", default=False,
937
parser.add_option("--check", action="store_true",
646
938
help="Run self-test")
647
parser.add_option("--debug", action="store_true", default=False,
648
help="Debug mode")
649
(options, args) = parser.parse_args()
939
parser.add_option("--debug", action="store_true",
940
help="Debug mode; run in foreground and log to"
941
" terminal")
942
parser.add_option("--priority", type="string", help="GnuTLS"
943
" priority string (see GnuTLS documentation)")
944
parser.add_option("--servicename", type="string", metavar="NAME",
945
help="Zeroconf service name")
946
parser.add_option("--configdir", type="string",
947
default="/etc/mandos", metavar="DIR",
948
help="Directory to search for configuration"
949
" files")
950
parser.add_option("--no-dbus", action="store_false",
951
dest="use_dbus",
952
help="Do not provide D-Bus system bus"
953
" interface")
954
parser.add_option("--no-ipv6", action="store_false",
955
dest="use_ipv6", help="Do not use IPv6")
956
options = parser.parse_args()[0]
650
957
651
958
if options.check:
652
959
import doctest
653
960
doctest.testmod()
654
961
sys.exit()
655
962
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")
963
# Default values for config file for server-global settings
964
server_defaults = { "interface": "",
965
"address": "",
966
"port": "",
967
"debug": "False",
968
"priority":
969
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
970
"servicename": "Mandos",
971
"use_dbus": "True",
972
"use_ipv6": "True",
973
}
974
975
# Parse config file for server-global settings
976
server_config = ConfigParser.SafeConfigParser(server_defaults)
977
del server_defaults
978
server_config.read(os.path.join(options.configdir, "mandos.conf"))
979
# Convert the SafeConfigParser object to a dict
980
server_settings = server_config.defaults()
981
# Use the appropriate methods on the non-string config options
982
server_settings["debug"] = server_config.getboolean("DEFAULT",
983
"debug")
984
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
985
"use_dbus")
986
server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
987
"use_ipv6")
988
if server_settings["port"]:
989
server_settings["port"] = server_config.getint("DEFAULT",
990
"port")
991
del server_config
992
993
# Override the settings from the config file with command line
994
# options, if set.
995
for option in ("interface", "address", "port", "debug",
996
"priority", "servicename", "configdir",
997
"use_dbus", "use_ipv6"):
998
value = getattr(options, option)
999
if value is not None:
1000
server_settings[option] = value
1001
del options
1002
# Now we have our good server settings in "server_settings"
1003
1004
# For convenience
1005
debug = server_settings["debug"]
1006
use_dbus = server_settings["use_dbus"]
1007
use_ipv6 = server_settings["use_ipv6"]
1008
1009
if not debug:
1010
syslogger.setLevel(logging.WARNING)
1011
console.setLevel(logging.WARNING)
1012
1013
if server_settings["servicename"] != "Mandos":
1014
syslogger.setFormatter(logging.Formatter
1015
('Mandos (%s): %%(levelname)s:'
1016
' %%(message)s'
1017
% server_settings["servicename"]))
1018
1019
# Parse config file with clients
1020
client_defaults = { "timeout": "1h",
1021
"interval": "5m",
1022
"checker": "fping -q -- %%(host)s",
1023
"host": "",
1024
}
1025
client_config = ConfigParser.SafeConfigParser(client_defaults)
1026
client_config.read(os.path.join(server_settings["configdir"],
1027
"clients.conf"))
1028
1029
clients = Set()
1030
tcp_server = IPv6_TCPServer((server_settings["address"],
1031
server_settings["port"]),
1032
TCP_handler,
1033
settings=server_settings,
1034
clients=clients, use_ipv6=use_ipv6)
1035
pidfilename = "/var/run/mandos.pid"
1036
try:
1037
pidfile = open(pidfilename, "w")
1038
except IOError:
1039
logger.error("Could not open file %r", pidfilename)
1040
1041
try:
1042
uid = pwd.getpwnam("_mandos").pw_uid
1043
gid = pwd.getpwnam("_mandos").pw_gid
1044
except KeyError:
1045
try:
1046
uid = pwd.getpwnam("mandos").pw_uid
1047
gid = pwd.getpwnam("mandos").pw_gid
1048
except KeyError:
1049
try:
1050
uid = pwd.getpwnam("nobody").pw_uid
1051
gid = pwd.getpwnam("nogroup").pw_gid
1052
except KeyError:
1053
uid = 65534
1054
gid = 65534
1055
try:
1056
os.setgid(gid)
1057
os.setuid(uid)
1058
except OSError, error:
1059
if error[0] != errno.EPERM:
1060
raise error
1061
1062
# Enable all possible GnuTLS debugging
1063
if debug:
1064
# "Use a log level over 10 to enable all debugging options."
1065
# - GnuTLS manual
1066
gnutls.library.functions.gnutls_global_set_log_level(11)
1067
1068
@gnutls.library.types.gnutls_log_func
1069
def debug_gnutls(level, string):
1070
logger.debug("GnuTLS: %s", string[:-1])
1071
1072
(gnutls.library.functions
1073
.gnutls_global_set_log_function(debug_gnutls))
1074
1075
global service
1076
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1077
service = AvahiService(name = server_settings["servicename"],
1078
servicetype = "_mandos._tcp",
1079
protocol = protocol)
1080
if server_settings["interface"]:
1081
service.interface = (if_nametoindex
1082
(server_settings["interface"]))
671
1083
672
1084
global main_loop
673
1085
global bus
676
1088
DBusGMainLoop(set_as_default=True )
677
1089
main_loop = gobject.MainLoop()
678
1090
bus = dbus.SystemBus()
679
server = dbus.Interface(
680
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
681
avahi.DBUS_INTERFACE_SERVER )
1091
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1092
avahi.DBUS_PATH_SERVER),
1093
avahi.DBUS_INTERFACE_SERVER)
682
1094
# End of Avahi example code
683
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
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))))
1095
if use_dbus:
1096
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1097
1098
clients.update(Set(Client(name = section,
1099
config
1100
= dict(client_config.items(section)),
1101
use_dbus = use_dbus)
705
1102
for section in client_config.sections()))
706
707
if not debug:
708
daemon(False, False)
1103
if not clients:
1104
logger.warning(u"No clients defined")
1105
1106
if debug:
1107
# Redirect stdin so all checkers get /dev/null
1108
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1109
os.dup2(null, sys.stdin.fileno())
1110
if null > 2:
1111
os.close(null)
1112
else:
1113
# No console logging
1114
logger.removeHandler(console)
1115
# Close all input and output, do double fork, etc.
1116
daemon()
1117
1118
try:
1119
pid = os.getpid()
1120
pidfile.write(str(pid) + "\n")
1121
pidfile.close()
1122
del pidfile
1123
except IOError:
1124
logger.error(u"Could not write to file %r with PID %d",
1125
pidfilename, pid)
1126
except NameError:
1127
# "pidfile" was never created
1128
pass
1129
del pidfilename
709
1130
710
1131
def cleanup():
711
1132
"Cleanup function; run on exit"
718
1139
719
1140
while clients:
720
1141
client = clients.pop()
721
client.stop_hook = None
722
client.stop()
1142
client.disable_hook = None
1143
client.disable()
723
1144
724
1145
atexit.register(cleanup)
725
1146
726
1147
if not debug:
727
1148
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())
1149
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1150
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1151
1152
if use_dbus:
1153
class MandosServer(dbus.service.Object):
1154
"""A D-Bus proxy object"""
1155
def __init__(self):
1156
dbus.service.Object.__init__(self, bus, "/")
1157
_interface = u"se.bsnet.fukt.Mandos"
1158
1159
@dbus.service.signal(_interface, signature="oa{sv}")
1160
def ClientAdded(self, objpath, properties):
1161
"D-Bus signal"
1162
pass
1163
1164
@dbus.service.signal(_interface, signature="os")
1165
def ClientRemoved(self, objpath, name):
1166
"D-Bus signal"
1167
pass
1168
1169
@dbus.service.method(_interface, out_signature="ao")
1170
def GetAllClients(self):
1171
"D-Bus method"
1172
return dbus.Array(c.dbus_object_path for c in clients)
1173
1174
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1175
def GetAllClientsWithProperties(self):
1176
"D-Bus method"
1177
return dbus.Dictionary(
1178
((c.dbus_object_path, c.GetAllProperties())
1179
for c in clients),
1180
signature="oa{sv}")
1181
1182
@dbus.service.method(_interface, in_signature="o")
1183
def RemoveClient(self, object_path):
1184
"D-Bus method"
1185
for c in clients:
1186
if c.dbus_object_path == object_path:
1187
clients.remove(c)
1188
# Don't signal anything except ClientRemoved
1189
c.use_dbus = False
1190
c.disable()
1191
# Emit D-Bus signal
1192
self.ClientRemoved(object_path, c.name)
1193
return
1194
raise KeyError
1195
1196
del _interface
1197
1198
mandos_server = MandosServer()
730
1199
731
1200
for client in clients:
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
1201
if use_dbus:
1202
# Emit D-Bus signal
1203
mandos_server.ClientAdded(client.dbus_object_path,
1204
client.GetAllProperties())
1205
client.enable()
1206
1207
tcp_server.enable()
1208
tcp_server.server_activate()
1209
1210
# Find out what port we got
1211
service.port = tcp_server.socket.getsockname()[1]
1212
if use_ipv6:
1213
logger.info(u"Now listening on address %r, port %d,"
1214
" flowinfo %d, scope_id %d"
1215
% tcp_server.socket.getsockname())
1216
else: # IPv4
1217
logger.info(u"Now listening on address %r, port %d"
1218
% tcp_server.socket.getsockname())
1219
1220
#service.interface = tcp_server.socket.getsockname()[3]
1221
1222
try:
1223
# From the Avahi example code
1224
server.connect_to_signal("StateChanged", server_state_changed)
1225
try:
1226
server_state_changed(server.GetState())
1227
except dbus.exceptions.DBusException, error:
1228
logger.critical(u"DBusException: %s", error)
1229
sys.exit(1)
1230
# End of Avahi example code
1231
1232
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1233
lambda *args, **kwargs:
1234
(tcp_server.handle_request
1235
(*args[2:], **kwargs) or True))
1236
1237
logger.debug(u"Starting main loop")
763
1238
main_loop.run()
1239
except AvahiError, error:
1240
logger.critical(u"AvahiError: %s", error)
1241
sys.exit(1)
764
1242
except KeyboardInterrupt:
765
1243
if debug:
766
print
767
768
sys.exit(exitstatus)
1244
print >> sys.stderr
1245
logger.debug("Server received KeyboardInterrupt")
1246
logger.debug("Server exiting")
769
1247
770
1248
if __name__ == '__main__':
771
1249
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0