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- Committer: Teddy Hogeborn
- Date: 2008-07-21 01:50:31 UTC
- Revision ID: teddy@fukt.bsnet.se-20080721015031-ivjiclli2j06hwgs
* Makefile: Include targets for all binaries.
* plugins.d/Makefile: Do nothing but call the parent Makefile.
* server.py: Added copyright statement and information.
(Client.__init__): Added doc string.
(Client.stop): Bug fix: Only log message if stopping for the first
time. Check if the "stop_initiator_tag" and
"checker_initiator_tag" attributes exist before using
them.
(Client.__del__): Call self.stop() instead of doing things here.
(Client.checker_callback): Set self.checker_callback_tag and
self.checker to None unconditionally and
immediately.
(Client.stop_checker): Added some checks to handle multiple calls.
(tcp_handler.handle): Use "self.server.clients" instead of "clients".
(__main__): Moved all code to the "main" function.
(main): New. New option "--address". Instantiate IPv6_TCPServer
with "options.address". Log before starting main loop.
(main.cleanup) Use "clients.pop()" to remove clients from the set as
they are stopped.
* plugins.d/Makefile: Do nothing but call the parent Makefile.
* server.py: Added copyright statement and information.
(Client.__init__): Added doc string.
(Client.stop): Bug fix: Only log message if stopping for the first
time. Check if the "stop_initiator_tag" and
"checker_initiator_tag" attributes exist before using
them.
(Client.__del__): Call self.stop() instead of doing things here.
(Client.checker_callback): Set self.checker_callback_tag and
self.checker to None unconditionally and
immediately.
(Client.stop_checker): Added some checks to handle multiple calls.
(tcp_handler.handle): Use "self.server.clients" instead of "clients".
(__main__): Moved all code to the "main" function.
(main): New. New option "--address". Instantiate IPv6_TCPServer
with "options.address". Log before starting main loop.
(main.cleanup) Use "clients.pop()" to remove clients from the set as
they are stopped.
- 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".
9
# following functions: "add_service", "remove_service",
10
# "server_state_changed", "entry_group_state_changed", and some lines
11
# in "main".
12
12
#
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
13
# Everything else is Copyright © 2007-2008 Teddy Hogeborn and Björn
14
# Påhlsson.
16
15
#
17
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/>.
30
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
36
import socket
38
import optparse
37
import select
38
from optparse import OptionParser
39
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import datetime
40
40
import errno
41
41
import gnutls.crypto
55
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import stat
56
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import logging
57
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import logging.handlers
58
import pwd
59
from contextlib import closing
60
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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.
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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
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logger.addHandler(syslogger)
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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
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
191
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 LookupError:
463
pass
464
if hasattr(dbus.service.Object, "__del__"):
465
dbus.service.Object.__del__(self, *args, **kwargs)
466
Client.__del__(self, *args, **kwargs)
467
468
def checker_callback(self, pid, condition, command,
469
*args, **kwargs):
470
self.checker_callback_tag = None
471
self.checker = None
472
# Emit D-Bus signal
473
self.PropertyChanged(dbus.String(u"checker_running"),
474
dbus.Boolean(False, variant_level=1))
475
if os.WIFEXITED(condition):
476
exitstatus = os.WEXITSTATUS(condition)
477
# Emit D-Bus signal
478
self.CheckerCompleted(dbus.Int16(exitstatus),
479
dbus.Int64(condition),
480
dbus.String(command))
481
else:
482
# Emit D-Bus signal
483
self.CheckerCompleted(dbus.Int16(-1),
484
dbus.Int64(condition),
485
dbus.String(command))
486
487
return Client.checker_callback(self, pid, condition, command,
488
*args, **kwargs)
489
490
def checked_ok(self, *args, **kwargs):
491
r = Client.checked_ok(self, *args, **kwargs)
492
# Emit D-Bus signal
493
self.PropertyChanged(
494
dbus.String(u"last_checked_ok"),
495
(_datetime_to_dbus(self.last_checked_ok,
496
variant_level=1)))
497
return r
498
499
def start_checker(self, *args, **kwargs):
500
old_checker = self.checker
501
if self.checker is not None:
502
old_checker_pid = self.checker.pid
503
else:
504
old_checker_pid = None
505
r = Client.start_checker(self, *args, **kwargs)
506
# Only if new checker process was started
507
if (self.checker is not None
508
and old_checker_pid != self.checker.pid):
509
# Emit D-Bus signal
510
self.CheckerStarted(self.current_checker_command)
511
self.PropertyChanged(
512
dbus.String("checker_running"),
513
dbus.Boolean(True, variant_level=1))
514
return r
515
516
def stop_checker(self, *args, **kwargs):
517
old_checker = getattr(self, "checker", None)
518
r = Client.stop_checker(self, *args, **kwargs)
519
if (old_checker is not None
520
and getattr(self, "checker", None) is None):
521
self.PropertyChanged(dbus.String(u"checker_running"),
522
dbus.Boolean(False, variant_level=1))
523
return r
524
525
## D-Bus methods & signals
526
_interface = u"se.bsnet.fukt.Mandos.Client"
527
528
# CheckedOK - method
529
CheckedOK = dbus.service.method(_interface)(checked_ok)
530
CheckedOK.__name__ = "CheckedOK"
531
532
# CheckerCompleted - signal
533
@dbus.service.signal(_interface, signature="nxs")
534
def CheckerCompleted(self, exitcode, waitstatus, command):
535
"D-Bus signal"
536
pass
537
538
# CheckerStarted - signal
539
@dbus.service.signal(_interface, signature="s")
540
def CheckerStarted(self, command):
541
"D-Bus signal"
542
pass
543
544
# GetAllProperties - method
545
@dbus.service.method(_interface, out_signature="a{sv}")
546
def GetAllProperties(self):
547
"D-Bus method"
548
return dbus.Dictionary({
549
dbus.String("name"):
550
dbus.String(self.name, variant_level=1),
551
dbus.String("fingerprint"):
552
dbus.String(self.fingerprint, variant_level=1),
553
dbus.String("host"):
554
dbus.String(self.host, variant_level=1),
555
dbus.String("created"):
556
_datetime_to_dbus(self.created, variant_level=1),
557
dbus.String("last_enabled"):
558
(_datetime_to_dbus(self.last_enabled,
559
variant_level=1)
560
if self.last_enabled is not None
561
else dbus.Boolean(False, variant_level=1)),
562
dbus.String("enabled"):
563
dbus.Boolean(self.enabled, variant_level=1),
564
dbus.String("last_checked_ok"):
565
(_datetime_to_dbus(self.last_checked_ok,
566
variant_level=1)
567
if self.last_checked_ok is not None
568
else dbus.Boolean (False, variant_level=1)),
569
dbus.String("timeout"):
570
dbus.UInt64(self.timeout_milliseconds(),
571
variant_level=1),
572
dbus.String("interval"):
573
dbus.UInt64(self.interval_milliseconds(),
574
variant_level=1),
575
dbus.String("checker"):
576
dbus.String(self.checker_command,
577
variant_level=1),
578
dbus.String("checker_running"):
579
dbus.Boolean(self.checker is not None,
580
variant_level=1),
581
dbus.String("object_path"):
582
dbus.ObjectPath(self.dbus_object_path,
583
variant_level=1)
584
}, signature="sv")
585
586
# IsStillValid - method
587
@dbus.service.method(_interface, out_signature="b")
588
def IsStillValid(self):
589
return self.still_valid()
590
591
# PropertyChanged - signal
592
@dbus.service.signal(_interface, signature="sv")
593
def PropertyChanged(self, property, value):
594
"D-Bus signal"
595
pass
596
597
# ReceivedSecret - signal
598
@dbus.service.signal(_interface)
599
def ReceivedSecret(self):
600
"D-Bus signal"
601
pass
602
603
# Rejected - signal
604
@dbus.service.signal(_interface)
605
def Rejected(self):
606
"D-Bus signal"
607
pass
608
609
# SetChecker - method
610
@dbus.service.method(_interface, in_signature="s")
611
def SetChecker(self, checker):
612
"D-Bus setter method"
613
self.checker_command = checker
614
# Emit D-Bus signal
615
self.PropertyChanged(dbus.String(u"checker"),
616
dbus.String(self.checker_command,
617
variant_level=1))
618
619
# SetHost - method
620
@dbus.service.method(_interface, in_signature="s")
621
def SetHost(self, host):
622
"D-Bus setter method"
623
self.host = host
624
# Emit D-Bus signal
625
self.PropertyChanged(dbus.String(u"host"),
626
dbus.String(self.host, variant_level=1))
627
628
# SetInterval - method
629
@dbus.service.method(_interface, in_signature="t")
630
def SetInterval(self, milliseconds):
631
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
632
# Emit D-Bus signal
633
self.PropertyChanged(dbus.String(u"interval"),
634
(dbus.UInt64(self.interval_milliseconds(),
635
variant_level=1)))
636
637
# SetSecret - method
638
@dbus.service.method(_interface, in_signature="ay",
639
byte_arrays=True)
640
def SetSecret(self, secret):
641
"D-Bus setter method"
642
self.secret = str(secret)
643
644
# SetTimeout - method
645
@dbus.service.method(_interface, in_signature="t")
646
def SetTimeout(self, milliseconds):
647
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
648
# Emit D-Bus signal
649
self.PropertyChanged(dbus.String(u"timeout"),
650
(dbus.UInt64(self.timeout_milliseconds(),
651
variant_level=1)))
652
653
# Enable - method
654
Enable = dbus.service.method(_interface)(enable)
655
Enable.__name__ = "Enable"
656
657
# StartChecker - method
658
@dbus.service.method(_interface)
659
def StartChecker(self):
660
"D-Bus method"
661
self.start_checker()
662
663
# Disable - method
664
@dbus.service.method(_interface)
665
def Disable(self):
666
"D-Bus method"
667
self.disable()
668
669
# StopChecker - method
670
StopChecker = dbus.service.method(_interface)(stop_checker)
671
StopChecker.__name__ = "StopChecker"
672
673
del _interface
314
return now < (self.last_seen + self.timeout)
674
315
675
316
676
317
def peer_certificate(session):
677
318
"Return the peer's OpenPGP certificate as a bytestring"
678
319
# If not an OpenPGP certificate...
679
if (gnutls.library.functions
680
.gnutls_certificate_type_get(session._c_object)
681
!= 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:
682
323
# ...do the normal thing
683
324
return session.peer_certificate
684
list_size = ctypes.c_uint(1)
685
cert_list = (gnutls.library.functions
686
.gnutls_certificate_get_peers
687
(session._c_object, ctypes.byref(list_size)))
688
if not bool(cert_list) and list_size.value != 0:
689
raise gnutls.errors.GNUTLSError("error getting peer"
690
" 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))
691
328
if list_size.value == 0:
692
329
return None
693
330
cert = cert_list[0]
696
333
697
334
def fingerprint(openpgp):
698
335
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
699
# New GnuTLS "datum" with the OpenPGP public key
700
datum = (gnutls.library.types
701
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
702
ctypes.POINTER
703
(ctypes.c_ubyte)),
704
ctypes.c_uint(len(openpgp))))
705
336
# New empty GnuTLS certificate
706
337
crt = gnutls.library.types.gnutls_openpgp_crt_t()
707
(gnutls.library.functions
708
.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)))
709
345
# Import the OpenPGP public key into the certificate
710
(gnutls.library.functions
711
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
712
gnutls.library.constants
713
.GNUTLS_OPENPGP_FMT_RAW))
714
# Verify the self signature in the key
715
crtverify = ctypes.c_uint()
716
(gnutls.library.functions
717
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
718
if crtverify.value != 0:
719
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
720
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)
721
350
# New buffer for the fingerprint
722
buf = ctypes.create_string_buffer(20)
723
buf_len = ctypes.c_size_t()
351
buffer = ctypes.create_string_buffer(20)
352
buffer_length = ctypes.c_size_t()
724
353
# Get the fingerprint from the certificate into the buffer
725
(gnutls.library.functions
726
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
727
ctypes.byref(buf_len)))
354
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
355
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
728
356
# Deinit the certificate
729
357
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
730
358
# Convert the buffer to a Python bytestring
731
fpr = ctypes.string_at(buf, buf_len.value)
359
fpr = ctypes.string_at(buffer, buffer_length.value)
732
360
# Convert the bytestring to hexadecimal notation
733
361
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
734
362
return hex_fpr
735
363
736
364
737
class TCP_handler(SocketServer.BaseRequestHandler, object):
365
class tcp_handler(SocketServer.BaseRequestHandler, object):
738
366
"""A TCP request handler class.
739
367
Instantiated by IPv6_TCPServer for each request to handle it.
740
368
Note: This will run in its own forked process."""
741
369
742
370
def handle(self):
743
logger.info(u"TCP connection from: %s",
744
unicode(self.client_address))
745
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
746
# Open IPC pipe to parent process
747
with closing(os.fdopen(self.server.pipe[1], "w", 1)) as ipc:
748
session = (gnutls.connection
749
.ClientSession(self.request,
750
gnutls.connection
751
.X509Credentials()))
752
753
line = self.request.makefile().readline()
754
logger.debug(u"Protocol version: %r", line)
755
try:
756
if int(line.strip().split()[0]) > 1:
757
raise RuntimeError
758
except (ValueError, IndexError, RuntimeError), error:
759
logger.error(u"Unknown protocol version: %s", error)
760
return
761
762
# Note: gnutls.connection.X509Credentials is really a
763
# generic GnuTLS certificate credentials object so long as
764
# no X.509 keys are added to it. Therefore, we can use it
765
# here despite using OpenPGP certificates.
766
767
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
768
# "+AES-256-CBC", "+SHA1",
769
# "+COMP-NULL", "+CTYPE-OPENPGP",
770
# "+DHE-DSS"))
771
# Use a fallback default, since this MUST be set.
772
priority = self.server.settings.get("priority", "NORMAL")
773
(gnutls.library.functions
774
.gnutls_priority_set_direct(session._c_object,
775
priority, None))
776
777
try:
778
session.handshake()
779
except gnutls.errors.GNUTLSError, error:
780
logger.warning(u"Handshake failed: %s", error)
781
# Do not run session.bye() here: the session is not
782
# established. Just abandon the request.
783
return
784
logger.debug(u"Handshake succeeded")
785
try:
786
fpr = fingerprint(peer_certificate(session))
787
except (TypeError, gnutls.errors.GNUTLSError), error:
788
logger.warning(u"Bad certificate: %s", error)
789
session.bye()
790
return
791
logger.debug(u"Fingerprint: %s", fpr)
792
793
for c in self.server.clients:
794
if c.fingerprint == fpr:
795
client = c
796
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))
797
411
else:
798
logger.warning(u"Client not found for fingerprint: %s",
799
fpr)
800
ipc.write("NOTFOUND %s\n" % fpr)
801
session.bye()
802
return
803
# Have to check if client.still_valid(), since it is
804
# possible that the client timed out while establishing
805
# the GnuTLS session.
806
if not client.still_valid():
807
logger.warning(u"Client %(name)s is invalid",
808
vars(client))
809
ipc.write("INVALID %s\n" % client.name)
810
session.bye()
811
return
812
ipc.write("SENDING %s\n" % client.name)
813
sent_size = 0
814
while sent_size < len(client.secret):
815
sent = session.send(client.secret[sent_size:])
816
logger.debug(u"Sent: %d, remaining: %d",
817
sent, len(client.secret)
818
- (sent_size + sent))
819
sent_size += sent
412
logger.debug(u"Client not found for fingerprint: %s",
413
fpr)
820
414
session.bye()
821
822
823
class ForkingMixInWithPipe(SocketServer.ForkingMixIn, object):
824
"""Like SocketServer.ForkingMixIn, but also pass a pipe.
825
Assumes a gobject.MainLoop event loop.
826
"""
827
def process_request(self, request, client_address):
828
"""This overrides and wraps the original process_request().
829
This function creates a new pipe in self.pipe
830
"""
831
self.pipe = os.pipe()
832
super(ForkingMixInWithPipe,
833
self).process_request(request, client_address)
834
os.close(self.pipe[1]) # close write end
835
# Call "handle_ipc" for both data and EOF events
836
gobject.io_add_watch(self.pipe[0],
837
gobject.IO_IN | gobject.IO_HUP,
838
self.handle_ipc)
839
def handle_ipc(source, condition):
840
"""Dummy function; override as necessary"""
841
os.close(source)
842
return False
843
844
845
class IPv6_TCPServer(ForkingMixInWithPipe,
846
SocketServer.TCPServer, object):
847
"""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.
848
428
Attributes:
849
settings: Server settings
429
options: Command line options
850
430
clients: Set() of Client objects
851
enabled: Boolean; whether this server is activated yet
852
431
"""
853
432
address_family = socket.AF_INET6
854
433
def __init__(self, *args, **kwargs):
855
if "settings" in kwargs:
856
self.settings = kwargs["settings"]
857
del kwargs["settings"]
434
if "options" in kwargs:
435
self.options = kwargs["options"]
436
del kwargs["options"]
858
437
if "clients" in kwargs:
859
438
self.clients = kwargs["clients"]
860
439
del kwargs["clients"]
861
if "use_ipv6" in kwargs:
862
if not kwargs["use_ipv6"]:
863
self.address_family = socket.AF_INET
864
del kwargs["use_ipv6"]
865
self.enabled = False
866
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
440
return super(type(self), self).__init__(*args, **kwargs)
867
441
def server_bind(self):
868
442
"""This overrides the normal server_bind() function
869
443
to bind to an interface if one was specified, and also NOT to
870
444
bind to an address or port if they were not specified."""
871
if self.settings["interface"]:
872
# 25 is from /usr/include/asm-i486/socket.h
873
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
874
449
try:
875
450
self.socket.setsockopt(socket.SOL_SOCKET,
876
SO_BINDTODEVICE,
877
self.settings["interface"])
451
socket.SO_BINDTODEVICE,
452
self.options.interface)
878
453
except socket.error, error:
879
454
if error[0] == errno.EPERM:
880
logger.error(u"No permission to"
881
u" bind to interface %s",
882
self.settings["interface"])
455
logger.warning(u"No permission to"
456
u" bind to interface %s",
457
self.options.interface)
883
458
else:
884
raise
459
raise error
885
460
# Only bind(2) the socket if we really need to.
886
461
if self.server_address[0] or self.server_address[1]:
887
462
if not self.server_address[0]:
888
if self.address_family == socket.AF_INET6:
889
any_address = "::" # in6addr_any
890
else:
891
any_address = socket.INADDR_ANY
892
self.server_address = (any_address,
463
in6addr_any = "::"
464
self.server_address = (in6addr_any,
893
465
self.server_address[1])
894
elif not self.server_address[1]:
466
elif self.server_address[1] is None:
895
467
self.server_address = (self.server_address[0],
896
468
0)
897
# if self.settings["interface"]:
898
# self.server_address = (self.server_address[0],
899
# 0, # port
900
# 0, # flowinfo
901
# if_nametoindex
902
# (self.settings
903
# ["interface"]))
904
return super(IPv6_TCPServer, self).server_bind()
905
def server_activate(self):
906
if self.enabled:
907
return super(IPv6_TCPServer, self).server_activate()
908
def enable(self):
909
self.enabled = True
910
def handle_ipc(self, source, condition, file_objects={}):
911
condition_names = {
912
gobject.IO_IN: "IN", # There is data to read.
913
gobject.IO_OUT: "OUT", # Data can be written (without
914
# blocking).
915
gobject.IO_PRI: "PRI", # There is urgent data to read.
916
gobject.IO_ERR: "ERR", # Error condition.
917
gobject.IO_HUP: "HUP" # Hung up (the connection has been
918
# broken, usually for pipes and
919
# sockets).
920
}
921
conditions_string = ' | '.join(name
922
for cond, name in
923
condition_names.iteritems()
924
if cond & condition)
925
logger.debug("Handling IPC: FD = %d, condition = %s", source,
926
conditions_string)
927
928
# Turn the pipe file descriptor into a Python file object
929
if source not in file_objects:
930
file_objects[source] = os.fdopen(source, "r", 1)
931
932
# Read a line from the file object
933
cmdline = file_objects[source].readline()
934
if not cmdline: # Empty line means end of file
935
# close the IPC pipe
936
file_objects[source].close()
937
del file_objects[source]
938
939
# Stop calling this function
940
return False
941
942
logger.debug("IPC command: %r\n" % cmdline)
943
944
# Parse and act on command
945
cmd, args = cmdline.split(None, 1)
946
if cmd == "NOTFOUND":
947
if self.settings["use_dbus"]:
948
# Emit D-Bus signal
949
mandos_dbus_service.ClientNotFound(args)
950
elif cmd == "INVALID":
951
if self.settings["use_dbus"]:
952
for client in self.clients:
953
if client.name == args:
954
# Emit D-Bus signal
955
client.Rejected()
956
break
957
elif cmd == "SENDING":
958
for client in self.clients:
959
if client.name == args:
960
client.checked_ok()
961
if self.settings["use_dbus"]:
962
# Emit D-Bus signal
963
client.ReceivedSecret()
964
break
965
else:
966
logger.error("Unknown IPC command: %r", cmdline)
967
968
# Keep calling this function
969
return True
469
return super(type(self), self).server_bind()
970
470
971
471
972
472
def string_to_delta(interval):
973
473
"""Parse a string and return a datetime.timedelta
974
474
975
475
>>> string_to_delta('7d')
976
476
datetime.timedelta(7)
977
477
>>> string_to_delta('60s')
982
482
datetime.timedelta(1)
983
483
>>> string_to_delta(u'1w')
984
484
datetime.timedelta(7)
985
>>> string_to_delta('5m 30s')
986
datetime.timedelta(0, 330)
987
485
"""
988
timevalue = datetime.timedelta(0)
989
for s in interval.split():
990
try:
991
suffix = unicode(s[-1])
992
value = int(s[:-1])
993
if suffix == u"d":
994
delta = datetime.timedelta(value)
995
elif suffix == u"s":
996
delta = datetime.timedelta(0, value)
997
elif suffix == u"m":
998
delta = datetime.timedelta(0, 0, 0, 0, value)
999
elif suffix == u"h":
1000
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1001
elif suffix == u"w":
1002
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1003
else:
1004
raise ValueError
1005
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:
1006
500
raise ValueError
1007
timevalue += delta
1008
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()
1009
537
1010
538
1011
539
def server_state_changed(state):
1012
540
"""Derived from the Avahi example code"""
1013
541
if state == avahi.SERVER_COLLISION:
1014
logger.error(u"Zeroconf server name collision")
1015
service.remove()
542
logger.warning(u"Server name collision")
543
remove_service()
1016
544
elif state == avahi.SERVER_RUNNING:
1017
service.add()
545
add_service()
1018
546
1019
547
1020
548
def entry_group_state_changed(state, error):
1021
549
"""Derived from the Avahi example code"""
1022
logger.debug(u"Avahi state change: %i", state)
550
global serviceName, server, rename_count
551
552
logger.debug(u"state change: %i", state)
1023
553
1024
554
if state == avahi.ENTRY_GROUP_ESTABLISHED:
1025
logger.debug(u"Zeroconf service established.")
555
logger.debug(u"Service established.")
1026
556
elif state == avahi.ENTRY_GROUP_COLLISION:
1027
logger.warning(u"Zeroconf service name collision.")
1028
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)
1029
570
elif state == avahi.ENTRY_GROUP_FAILURE:
1030
logger.critical(u"Avahi: Error in group state changed %s",
1031
unicode(error))
1032
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
1033
575
1034
576
def if_nametoindex(interface):
1035
"""Call the C function if_nametoindex(), or equivalent"""
1036
global if_nametoindex
577
"""Call the C function if_nametoindex()"""
1037
578
try:
1038
if_nametoindex = (ctypes.cdll.LoadLibrary
1039
(ctypes.util.find_library("c"))
1040
.if_nametoindex)
579
libc = ctypes.cdll.LoadLibrary("libc.so.6")
580
return libc.if_nametoindex(interface)
1041
581
except (OSError, AttributeError):
1042
582
if "struct" not in sys.modules:
1043
583
import struct
1044
584
if "fcntl" not in sys.modules:
1045
585
import fcntl
1046
def if_nametoindex(interface):
1047
"Get an interface index the hard way, i.e. using fcntl()"
1048
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1049
with closing(socket.socket()) as s:
1050
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1051
struct.pack("16s16x", interface))
1052
interface_index = struct.unpack("I", ifreq[16:20])[0]
1053
return interface_index
1054
return if_nametoindex(interface)
1055
1056
1057
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):
1058
596
"""See daemon(3). Standard BSD Unix function.
1059
597
This should really exist as os.daemon, but it doesn't (yet)."""
1060
598
if os.fork():
1062
600
os.setsid()
1063
601
if not nochdir:
1064
602
os.chdir("/")
1065
if os.fork():
1066
sys.exit()
1067
603
if not noclose:
1068
604
# Close all standard open file descriptors
1069
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
605
null = os.open("/dev/null", os.O_NOCTTY | os.O_RDWR)
1070
606
if not stat.S_ISCHR(os.fstat(null).st_mode):
1071
607
raise OSError(errno.ENODEV,
1072
608
"/dev/null not a character device")
1077
613
os.close(null)
1078
614
1079
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
1080
625
def main():
1081
1082
######################################################################
1083
# Parsing of options, both command line and config file
1084
1085
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()
1086
632
parser.add_option("-i", "--interface", type="string",
1087
metavar="IF", help="Bind to interface IF")
1088
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,
1089
636
help="Address to listen for requests on")
1090
parser.add_option("-p", "--port", type="int",
637
parser.add_option("-p", "--port", type="int", default=None,
1091
638
help="Port number to receive requests on")
1092
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,
1093
646
help="Run self-test")
1094
parser.add_option("--debug", action="store_true",
1095
help="Debug mode; run in foreground and log to"
1096
" terminal")
1097
parser.add_option("--priority", type="string", help="GnuTLS"
1098
" priority string (see GnuTLS documentation)")
1099
parser.add_option("--servicename", type="string", metavar="NAME",
1100
help="Zeroconf service name")
1101
parser.add_option("--configdir", type="string",
1102
default="/etc/mandos", metavar="DIR",
1103
help="Directory to search for configuration"
1104
" files")
1105
parser.add_option("--no-dbus", action="store_false",
1106
dest="use_dbus",
1107
help="Do not provide D-Bus system bus"
1108
" interface")
1109
parser.add_option("--no-ipv6", action="store_false",
1110
dest="use_ipv6", help="Do not use IPv6")
1111
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()
1112
650
1113
651
if options.check:
1114
652
import doctest
1115
653
doctest.testmod()
1116
654
sys.exit()
1117
655
1118
# Default values for config file for server-global settings
1119
server_defaults = { "interface": "",
1120
"address": "",
1121
"port": "",
1122
"debug": "False",
1123
"priority":
1124
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1125
"servicename": "Mandos",
1126
"use_dbus": "True",
1127
"use_ipv6": "True",
1128
}
1129
1130
# Parse config file for server-global settings
1131
server_config = ConfigParser.SafeConfigParser(server_defaults)
1132
del server_defaults
1133
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1134
# Convert the SafeConfigParser object to a dict
1135
server_settings = server_config.defaults()
1136
# Use the appropriate methods on the non-string config options
1137
server_settings["debug"] = server_config.getboolean("DEFAULT",
1138
"debug")
1139
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
1140
"use_dbus")
1141
server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
1142
"use_ipv6")
1143
if server_settings["port"]:
1144
server_settings["port"] = server_config.getint("DEFAULT",
1145
"port")
1146
del server_config
1147
1148
# Override the settings from the config file with command line
1149
# options, if set.
1150
for option in ("interface", "address", "port", "debug",
1151
"priority", "servicename", "configdir",
1152
"use_dbus", "use_ipv6"):
1153
value = getattr(options, option)
1154
if value is not None:
1155
server_settings[option] = value
1156
del options
1157
# Now we have our good server settings in "server_settings"
1158
1159
##################################################################
1160
1161
# For convenience
1162
debug = server_settings["debug"]
1163
use_dbus = server_settings["use_dbus"]
1164
use_ipv6 = server_settings["use_ipv6"]
1165
1166
if not debug:
1167
syslogger.setLevel(logging.WARNING)
1168
console.setLevel(logging.WARNING)
1169
1170
if server_settings["servicename"] != "Mandos":
1171
syslogger.setFormatter(logging.Formatter
1172
('Mandos (%s) [%%(process)d]:'
1173
' %%(levelname)s: %%(message)s'
1174
% server_settings["servicename"]))
1175
1176
# Parse config file with clients
1177
client_defaults = { "timeout": "1h",
1178
"interval": "5m",
1179
"checker": "fping -q -- %%(host)s",
1180
"host": "",
1181
}
1182
client_config = ConfigParser.SafeConfigParser(client_defaults)
1183
client_config.read(os.path.join(server_settings["configdir"],
1184
"clients.conf"))
1185
1186
global mandos_dbus_service
1187
mandos_dbus_service = None
1188
1189
clients = Set()
1190
tcp_server = IPv6_TCPServer((server_settings["address"],
1191
server_settings["port"]),
1192
TCP_handler,
1193
settings=server_settings,
1194
clients=clients, use_ipv6=use_ipv6)
1195
pidfilename = "/var/run/mandos.pid"
1196
try:
1197
pidfile = open(pidfilename, "w")
1198
except IOError:
1199
logger.error("Could not open file %r", pidfilename)
1200
1201
try:
1202
uid = pwd.getpwnam("_mandos").pw_uid
1203
gid = pwd.getpwnam("_mandos").pw_gid
1204
except KeyError:
1205
try:
1206
uid = pwd.getpwnam("mandos").pw_uid
1207
gid = pwd.getpwnam("mandos").pw_gid
1208
except KeyError:
1209
try:
1210
uid = pwd.getpwnam("nobody").pw_uid
1211
gid = pwd.getpwnam("nogroup").pw_gid
1212
except KeyError:
1213
uid = 65534
1214
gid = 65534
1215
try:
1216
os.setgid(gid)
1217
os.setuid(uid)
1218
except OSError, error:
1219
if error[0] != errno.EPERM:
1220
raise error
1221
1222
# Enable all possible GnuTLS debugging
1223
if debug:
1224
# "Use a log level over 10 to enable all debugging options."
1225
# - GnuTLS manual
1226
gnutls.library.functions.gnutls_global_set_log_level(11)
1227
1228
@gnutls.library.types.gnutls_log_func
1229
def debug_gnutls(level, string):
1230
logger.debug("GnuTLS: %s", string[:-1])
1231
1232
(gnutls.library.functions
1233
.gnutls_global_set_log_function(debug_gnutls))
1234
1235
global service
1236
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1237
service = AvahiService(name = server_settings["servicename"],
1238
servicetype = "_mandos._tcp",
1239
protocol = protocol)
1240
if server_settings["interface"]:
1241
service.interface = (if_nametoindex
1242
(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")
1243
671
1244
672
global main_loop
1245
673
global bus
1248
676
DBusGMainLoop(set_as_default=True )
1249
677
main_loop = gobject.MainLoop()
1250
678
bus = dbus.SystemBus()
1251
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1252
avahi.DBUS_PATH_SERVER),
1253
avahi.DBUS_INTERFACE_SERVER)
679
server = dbus.Interface(
680
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
681
avahi.DBUS_INTERFACE_SERVER )
1254
682
# End of Avahi example code
1255
if use_dbus:
1256
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1257
683
1258
client_class = Client
1259
if use_dbus:
1260
client_class = ClientDBus
1261
clients.update(Set(
1262
client_class(name = section,
1263
config= dict(client_config.items(section)))
1264
for section in client_config.sections()))
1265
if not clients:
1266
logger.warning(u"No clients defined")
684
debug = options.debug
1267
685
1268
686
if debug:
1269
# Redirect stdin so all checkers get /dev/null
1270
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1271
os.dup2(null, sys.stdin.fileno())
1272
if null > 2:
1273
os.close(null)
1274
else:
1275
# No console logging
1276
logger.removeHandler(console)
1277
# Close all input and output, do double fork, etc.
1278
daemon()
1279
1280
try:
1281
with closing(pidfile):
1282
pid = os.getpid()
1283
pidfile.write(str(pid) + "\n")
1284
del pidfile
1285
except IOError:
1286
logger.error(u"Could not write to file %r with PID %d",
1287
pidfilename, pid)
1288
except NameError:
1289
# "pidfile" was never created
1290
pass
1291
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)
1292
709
1293
710
def cleanup():
1294
711
"Cleanup function; run on exit"
1301
718
1302
719
while clients:
1303
720
client = clients.pop()
1304
client.disable_hook = None
1305
client.disable()
721
client.stop_hook = None
722
client.stop()
1306
723
1307
724
atexit.register(cleanup)
1308
725
1309
726
if not debug:
1310
727
signal.signal(signal.SIGINT, signal.SIG_IGN)
1311
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1312
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1313
1314
if use_dbus:
1315
class MandosDBusService(dbus.service.Object):
1316
"""A D-Bus proxy object"""
1317
def __init__(self):
1318
dbus.service.Object.__init__(self, bus, "/")
1319
_interface = u"se.bsnet.fukt.Mandos"
1320
1321
@dbus.service.signal(_interface, signature="oa{sv}")
1322
def ClientAdded(self, objpath, properties):
1323
"D-Bus signal"
1324
pass
1325
1326
@dbus.service.signal(_interface, signature="s")
1327
def ClientNotFound(self, fingerprint):
1328
"D-Bus signal"
1329
pass
1330
1331
@dbus.service.signal(_interface, signature="os")
1332
def ClientRemoved(self, objpath, name):
1333
"D-Bus signal"
1334
pass
1335
1336
@dbus.service.method(_interface, out_signature="ao")
1337
def GetAllClients(self):
1338
"D-Bus method"
1339
return dbus.Array(c.dbus_object_path for c in clients)
1340
1341
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1342
def GetAllClientsWithProperties(self):
1343
"D-Bus method"
1344
return dbus.Dictionary(
1345
((c.dbus_object_path, c.GetAllProperties())
1346
for c in clients),
1347
signature="oa{sv}")
1348
1349
@dbus.service.method(_interface, in_signature="o")
1350
def RemoveClient(self, object_path):
1351
"D-Bus method"
1352
for c in clients:
1353
if c.dbus_object_path == object_path:
1354
clients.remove(c)
1355
c.remove_from_connection()
1356
# Don't signal anything except ClientRemoved
1357
c.disable(signal=False)
1358
# Emit D-Bus signal
1359
self.ClientRemoved(object_path, c.name)
1360
return
1361
raise KeyError
1362
1363
del _interface
1364
1365
mandos_dbus_service = MandosDBusService()
728
signal.signal(signal.SIGHUP, lambda signum, frame: killme())
729
signal.signal(signal.SIGTERM, lambda signum, frame: killme())
1366
730
1367
731
for client in clients:
1368
if use_dbus:
1369
# Emit D-Bus signal
1370
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1371
client.GetAllProperties())
1372
client.enable()
1373
1374
tcp_server.enable()
1375
tcp_server.server_activate()
1376
1377
# Find out what port we got
1378
service.port = tcp_server.socket.getsockname()[1]
1379
if use_ipv6:
1380
logger.info(u"Now listening on address %r, port %d,"
1381
" flowinfo %d, scope_id %d"
1382
% tcp_server.socket.getsockname())
1383
else: # IPv4
1384
logger.info(u"Now listening on address %r, port %d"
1385
% tcp_server.socket.getsockname())
1386
1387
#service.interface = tcp_server.socket.getsockname()[3]
1388
1389
try:
1390
# From the Avahi example code
1391
server.connect_to_signal("StateChanged", server_state_changed)
1392
try:
1393
server_state_changed(server.GetState())
1394
except dbus.exceptions.DBusException, error:
1395
logger.critical(u"DBusException: %s", error)
1396
sys.exit(1)
1397
# End of Avahi example code
1398
1399
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1400
lambda *args, **kwargs:
1401
(tcp_server.handle_request
1402
(*args[2:], **kwargs) or True))
1403
1404
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
1405
763
main_loop.run()
1406
except AvahiError, error:
1407
logger.critical(u"AvahiError: %s", error)
1408
sys.exit(1)
1409
764
except KeyboardInterrupt:
1410
765
if debug:
1411
print >> sys.stderr
1412
logger.debug("Server received KeyboardInterrupt")
1413
logger.debug("Server exiting")
766
print
767
768
sys.exit(exitstatus)
1414
769
1415
770
if __name__ == '__main__':
1416
771
main()
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Version: 2.0.2.dev0