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- Committer: Teddy Hogeborn
- Date: 2008-08-03 03:33:56 UTC
- Revision ID: teddy@fukt.bsnet.se-20080803033356-6aemgj0g0hoz91ow
* plugins.d/mandosclient.c (pgp_packet_decrypt): Renamed variables.
On debug, show
decrypted plaintext
in hexadecimal. Free
the GPGME data
buffers even on
errors.
On debug, show
decrypted plaintext
in hexadecimal. Free
the GPGME data
buffers even on
errors.
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos.conf => server.conf
- 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: "AvahiService.add", "AvahiService.remove",
10
# "server_state_changed", "entry_group_state_changed", and some lines
11
# in "main".
12
12
#
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13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
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#
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# This program is free software: you can redistribute it and/or modify
18
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# it under the terms of the GNU General Public License as published by
25
24
# GNU General Public License for more details.
26
25
#
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# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# Contact the authors at <mandos@fukt.bsnet.se>.
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30
#
33
31
34
from __future__ import division, with_statement, absolute_import
32
from __future__ import division
35
33
36
import SocketServer as socketserver
34
import SocketServer
37
35
import socket
38
import optparse
36
import select
37
from optparse import OptionParser
39
38
import datetime
40
39
import errno
41
40
import gnutls.crypto
44
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import gnutls.library.functions
45
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import gnutls.library.constants
46
45
import gnutls.library.types
47
import ConfigParser as configparser
46
import ConfigParser
48
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import sys
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48
import re
50
49
import os
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50
import signal
51
from sets import Set
52
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import subprocess
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53
import atexit
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54
import stat
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import logging
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import logging.handlers
57
import pwd
58
from contextlib import closing
59
import struct
60
import fcntl
61
57
62
58
import dbus
63
import dbus.service
64
59
import gobject
65
60
import avahi
66
61
from dbus.mainloop.glib import DBusGMainLoop
67
62
import ctypes
68
import ctypes.util
69
70
try:
71
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
72
except AttributeError:
73
try:
74
from IN import SO_BINDTODEVICE
75
except ImportError:
76
# From /usr/include/asm/socket.h
77
SO_BINDTODEVICE = 25
78
79
80
version = "1.0.8"
81
82
logger = logging.Logger(u'mandos')
83
syslogger = (logging.handlers.SysLogHandler
84
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
85
address = "/dev/log"))
86
syslogger.setFormatter(logging.Formatter
87
(u'Mandos [%(process)d]: %(levelname)s:'
88
u' %(message)s'))
63
64
# Brief description of the operation of this program:
65
#
66
# This server announces itself as a Zeroconf service. Connecting
67
# clients use the TLS protocol, with the unusual quirk that this
68
# server program acts as a TLS "client" while a connecting client acts
69
# as a TLS "server". The client (acting as a TLS "server") must
70
# supply an OpenPGP certificate, and the fingerprint of this
71
# certificate is used by this server to look up (in a list read from a
72
# file at start time) which binary blob to give the client. No other
73
# authentication or authorization is done by this server.
74
75
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logger = logging.Logger('mandos')
77
syslogger = logging.handlers.SysLogHandler\
78
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
79
syslogger.setFormatter(logging.Formatter\
80
('%(levelname)s: %(message)s'))
89
81
logger.addHandler(syslogger)
82
del syslogger
90
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console = logging.StreamHandler()
92
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
93
u' %(levelname)s:'
94
u' %(message)s'))
95
logger.addHandler(console)
96
84
97
85
class AvahiError(Exception):
98
def __init__(self, value, *args, **kwargs):
86
def __init__(self, value):
99
87
self.value = value
100
super(AvahiError, self).__init__(value, *args, **kwargs)
101
def __unicode__(self):
102
return unicode(repr(self.value))
88
def __str__(self):
89
return repr(self.value)
103
90
104
91
class AvahiServiceError(AvahiError):
105
92
pass
109
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110
97
111
98
class AvahiService(object):
112
"""An Avahi (Zeroconf) service.
113
114
Attributes:
99
"""
115
100
interface: integer; avahi.IF_UNSPEC or an interface index.
116
101
Used to optionally bind to the specified interface.
117
name: string; Example: u'Mandos'
118
type: string; Example: u'_mandos._tcp'.
119
See <http://www.dns-sd.org/ServiceTypes.html>
120
port: integer; what port to announce
121
TXT: list of strings; TXT record for the service
122
domain: string; Domain to publish on, default to .local if empty.
123
host: string; Host to publish records for, default is localhost
124
max_renames: integer; maximum number of renames
125
rename_count: integer; counter so we only rename after collisions
126
a sensible number of times
102
name = string; Example: "Mandos"
103
type = string; Example: "_mandos._tcp".
104
See <http://www.dns-sd.org/ServiceTypes.html>
105
port = integer; what port to announce
106
TXT = list of strings; TXT record for the service
107
domain = string; Domain to publish on, default to .local if empty.
108
host = string; Host to publish records for, default to localhost
109
if empty.
110
max_renames = integer; maximum number of renames
111
rename_count = integer; counter so we only rename after collisions
112
a sensible number of times
127
113
"""
128
114
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
129
servicetype = None, port = None, TXT = None,
130
domain = u"", host = u"", max_renames = 32768,
131
protocol = avahi.PROTO_UNSPEC):
115
type = None, port = None, TXT = None, domain = "",
116
host = "", max_renames = 12):
117
"""An Avahi (Zeroconf) service. """
132
118
self.interface = interface
133
119
self.name = name
134
self.type = servicetype
120
self.type = type
135
121
self.port = port
136
self.TXT = TXT if TXT is not None else []
122
if TXT is None:
123
self.TXT = []
124
else:
125
self.TXT = TXT
137
126
self.domain = domain
138
127
self.host = host
139
128
self.rename_count = 0
140
self.max_renames = max_renames
141
self.protocol = protocol
142
129
def rename(self):
143
130
"""Derived from the Avahi example code"""
144
131
if self.rename_count >= self.max_renames:
145
logger.critical(u"No suitable Zeroconf service name found"
146
u" after %i retries, exiting.",
147
self.rename_count)
148
raise AvahiServiceError(u"Too many renames")
149
self.name = server.GetAlternativeServiceName(self.name)
150
logger.info(u"Changing Zeroconf service name to %r ...",
151
self.name)
152
syslogger.setFormatter(logging.Formatter
153
(u'Mandos (%s) [%%(process)d]:'
154
u' %%(levelname)s: %%(message)s'
155
% self.name))
132
logger.critical(u"No suitable service name found after %i"
133
u" retries, exiting.", rename_count)
134
raise AvahiServiceError("Too many renames")
135
name = server.GetAlternativeServiceName(name)
136
logger.notice(u"Changing name to %r ...", name)
156
137
self.remove()
157
138
self.add()
158
139
self.rename_count += 1
164
145
"""Derived from the Avahi example code"""
165
146
global group
166
147
if group is None:
167
group = dbus.Interface(bus.get_object
168
(avahi.DBUS_NAME,
148
group = dbus.Interface\
149
(bus.get_object(avahi.DBUS_NAME,
169
150
server.EntryGroupNew()),
170
avahi.DBUS_INTERFACE_ENTRY_GROUP)
151
avahi.DBUS_INTERFACE_ENTRY_GROUP)
171
152
group.connect_to_signal('StateChanged',
172
153
entry_group_state_changed)
173
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
154
logger.debug(u"Adding service '%s' of type '%s' ...",
174
155
service.name, service.type)
175
156
group.AddService(
176
157
self.interface, # interface
177
self.protocol, # protocol
158
avahi.PROTO_INET6, # protocol
178
159
dbus.UInt32(0), # flags
179
160
self.name, self.type,
180
161
self.domain, self.host,
187
168
# End of Avahi example code
188
169
189
170
190
def _datetime_to_dbus(dt, variant_level=0):
191
"""Convert a UTC datetime.datetime() to a D-Bus type."""
192
return dbus.String(dt.isoformat(), variant_level=variant_level)
193
194
195
171
class Client(object):
196
172
"""A representation of a client host served by this server.
197
198
173
Attributes:
199
name: string; from the config file, used in log messages and
200
D-Bus identifiers
174
name: string; from the config file, used in log messages
201
175
fingerprint: string (40 or 32 hexadecimal digits); used to
202
176
uniquely identify the client
203
secret: bytestring; sent verbatim (over TLS) to client
204
host: string; available for use by the checker command
205
created: datetime.datetime(); (UTC) object creation
206
last_enabled: datetime.datetime(); (UTC)
207
enabled: bool()
208
last_checked_ok: datetime.datetime(); (UTC) or None
209
timeout: datetime.timedelta(); How long from last_checked_ok
210
until this client is invalid
211
interval: datetime.timedelta(); How often to start a new checker
212
disable_hook: If set, called by disable() as disable_hook(self)
213
checker: subprocess.Popen(); a running checker process used
214
to see if the client lives.
215
'None' if no process is running.
177
secret: bytestring; sent verbatim (over TLS) to client
178
fqdn: string (FQDN); available for use by the checker command
179
created: datetime.datetime(); object creation, not client host
180
last_checked_ok: datetime.datetime() or None if not yet checked OK
181
timeout: datetime.timedelta(); How long from last_checked_ok
182
until this client is invalid
183
interval: datetime.timedelta(); How often to start a new checker
184
stop_hook: If set, called by stop() as stop_hook(self)
185
checker: subprocess.Popen(); a running checker process used
186
to see if the client lives.
187
'None' if no process is running.
216
188
checker_initiator_tag: a gobject event source tag, or None
217
disable_initiator_tag: - '' -
189
stop_initiator_tag: - '' -
218
190
checker_callback_tag: - '' -
219
191
checker_command: string; External command which is run to check if
220
192
client lives. %() expansions are done at
221
193
runtime with vars(self) as dict, so that for
222
194
instance %(name)s can be used in the command.
223
current_checker_command: string; current running checker_command
195
Private attibutes:
196
_timeout: Real variable for 'timeout'
197
_interval: Real variable for 'interval'
198
_timeout_milliseconds: Used when calling gobject.timeout_add()
199
_interval_milliseconds: - '' -
224
200
"""
225
226
@staticmethod
227
def _datetime_to_milliseconds(dt):
228
"Convert a datetime.datetime() to milliseconds"
229
return ((dt.days * 24 * 60 * 60 * 1000)
230
+ (dt.seconds * 1000)
231
+ (dt.microseconds // 1000))
232
233
def timeout_milliseconds(self):
234
"Return the 'timeout' attribute in milliseconds"
235
return self._datetime_to_milliseconds(self.timeout)
236
237
def interval_milliseconds(self):
238
"Return the 'interval' attribute in milliseconds"
239
return self._datetime_to_milliseconds(self.interval)
240
241
def __init__(self, name = None, disable_hook=None, config=None):
242
"""Note: the 'checker' key in 'config' sets the
243
'checker_command' attribute and *not* the 'checker'
244
attribute."""
201
def _set_timeout(self, timeout):
202
"Setter function for 'timeout' attribute"
203
self._timeout = timeout
204
self._timeout_milliseconds = ((self.timeout.days
205
* 24 * 60 * 60 * 1000)
206
+ (self.timeout.seconds * 1000)
207
+ (self.timeout.microseconds
208
// 1000))
209
timeout = property(lambda self: self._timeout,
210
_set_timeout)
211
del _set_timeout
212
def _set_interval(self, interval):
213
"Setter function for 'interval' attribute"
214
self._interval = interval
215
self._interval_milliseconds = ((self.interval.days
216
* 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds
218
* 1000)
219
+ (self.interval.microseconds
220
// 1000))
221
interval = property(lambda self: self._interval,
222
_set_interval)
223
del _set_interval
224
def __init__(self, name=None, stop_hook=None, fingerprint=None,
225
secret=None, secfile=None, fqdn=None, timeout=None,
226
interval=-1, checker=None):
227
"""Note: the 'checker' argument sets the 'checker_command'
228
attribute and not the 'checker' attribute.."""
245
229
self.name = name
246
if config is None:
247
config = {}
248
230
logger.debug(u"Creating client %r", self.name)
249
# Uppercase and remove spaces from fingerprint for later
250
# comparison purposes with return value from the fingerprint()
251
# function
252
self.fingerprint = (config[u"fingerprint"].upper()
253
.replace(u" ", u""))
231
# Uppercase and remove spaces from fingerprint
232
# for later comparison purposes with return value of
233
# the fingerprint() function
234
self.fingerprint = fingerprint.upper().replace(u" ", u"")
254
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
255
if u"secret" in config:
256
self.secret = config[u"secret"].decode(u"base64")
257
elif u"secfile" in config:
258
with closing(open(os.path.expanduser
259
(os.path.expandvars
260
(config[u"secfile"])))) as secfile:
261
self.secret = secfile.read()
236
if secret:
237
self.secret = secret.decode(u"base64")
238
elif secfile:
239
sf = open(secfile)
240
self.secret = sf.read()
241
sf.close()
262
242
else:
263
243
raise TypeError(u"No secret or secfile for client %s"
264
244
% self.name)
265
self.host = config.get(u"host", u"")
266
self.created = datetime.datetime.utcnow()
267
self.enabled = False
268
self.last_enabled = None
245
self.fqdn = fqdn
246
self.created = datetime.datetime.now()
269
247
self.last_checked_ok = None
270
self.timeout = string_to_delta(config[u"timeout"])
271
self.interval = string_to_delta(config[u"interval"])
272
self.disable_hook = disable_hook
248
self.timeout = string_to_delta(timeout)
249
self.interval = string_to_delta(interval)
250
self.stop_hook = stop_hook
273
251
self.checker = None
274
252
self.checker_initiator_tag = None
275
self.disable_initiator_tag = None
253
self.stop_initiator_tag = None
276
254
self.checker_callback_tag = None
277
self.checker_command = config[u"checker"]
278
self.current_checker_command = None
279
self.last_connect = None
280
281
def enable(self):
255
self.check_command = checker
256
def start(self):
282
257
"""Start this client's checker and timeout hooks"""
283
self.last_enabled = datetime.datetime.utcnow()
284
258
# Schedule a new checker to be started an 'interval' from now,
285
259
# and every interval from then on.
286
self.checker_initiator_tag = (gobject.timeout_add
287
(self.interval_milliseconds(),
288
self.start_checker))
260
self.checker_initiator_tag = gobject.timeout_add\
261
(self._interval_milliseconds,
262
self.start_checker)
289
263
# Also start a new checker *right now*.
290
264
self.start_checker()
291
# Schedule a disable() when 'timeout' has passed
292
self.disable_initiator_tag = (gobject.timeout_add
293
(self.timeout_milliseconds(),
294
self.disable))
295
self.enabled = True
296
297
def disable(self):
298
"""Disable this client."""
299
if not getattr(self, "enabled", False):
265
# Schedule a stop() when 'timeout' has passed
266
self.stop_initiator_tag = gobject.timeout_add\
267
(self._timeout_milliseconds,
268
self.stop)
269
def stop(self):
270
"""Stop this client.
271
The possibility that a client might be restarted is left open,
272
but not currently used."""
273
# If this client doesn't have a secret, it is already stopped.
274
if self.secret:
275
logger.debug(u"Stopping client %s", self.name)
276
self.secret = None
277
else:
300
278
return False
301
logger.info(u"Disabling client %s", self.name)
302
if getattr(self, u"disable_initiator_tag", False):
303
gobject.source_remove(self.disable_initiator_tag)
304
self.disable_initiator_tag = None
305
if getattr(self, u"checker_initiator_tag", False):
279
if getattr(self, "stop_initiator_tag", False):
280
gobject.source_remove(self.stop_initiator_tag)
281
self.stop_initiator_tag = None
282
if getattr(self, "checker_initiator_tag", False):
306
283
gobject.source_remove(self.checker_initiator_tag)
307
284
self.checker_initiator_tag = None
308
285
self.stop_checker()
309
if self.disable_hook:
310
self.disable_hook(self)
311
self.enabled = False
286
if self.stop_hook:
287
self.stop_hook(self)
312
288
# Do not run this again if called by a gobject.timeout_add
313
289
return False
314
315
290
def __del__(self):
316
self.disable_hook = None
317
self.disable()
318
319
def checker_callback(self, pid, condition, command):
291
self.stop_hook = None
292
self.stop()
293
def checker_callback(self, pid, condition):
320
294
"""The checker has completed, so take appropriate actions."""
295
now = datetime.datetime.now()
321
296
self.checker_callback_tag = None
322
297
self.checker = None
323
if os.WIFEXITED(condition):
324
exitstatus = os.WEXITSTATUS(condition)
325
if exitstatus == 0:
326
logger.info(u"Checker for %(name)s succeeded",
327
vars(self))
328
self.checked_ok()
329
else:
330
logger.info(u"Checker for %(name)s failed",
331
vars(self))
332
else:
298
if os.WIFEXITED(condition) \
299
and (os.WEXITSTATUS(condition) == 0):
300
logger.debug(u"Checker for %(name)s succeeded",
301
vars(self))
302
self.last_checked_ok = now
303
gobject.source_remove(self.stop_initiator_tag)
304
self.stop_initiator_tag = gobject.timeout_add\
305
(self._timeout_milliseconds,
306
self.stop)
307
elif not os.WIFEXITED(condition):
333
308
logger.warning(u"Checker for %(name)s crashed?",
334
309
vars(self))
335
336
def checked_ok(self):
337
"""Bump up the timeout for this client.
338
339
This should only be called when the client has been seen,
340
alive and well.
341
"""
342
self.last_checked_ok = datetime.datetime.utcnow()
343
gobject.source_remove(self.disable_initiator_tag)
344
self.disable_initiator_tag = (gobject.timeout_add
345
(self.timeout_milliseconds(),
346
self.disable))
347
310
else:
311
logger.debug(u"Checker for %(name)s failed",
312
vars(self))
348
313
def start_checker(self):
349
314
"""Start a new checker subprocess if one is not running.
350
351
315
If a checker already exists, leave it running and do
352
316
nothing."""
353
317
# The reason for not killing a running checker is that if we
358
322
# checkers alone, the checker would have to take more time
359
323
# than 'timeout' for the client to be declared invalid, which
360
324
# is as it should be.
361
362
# If a checker exists, make sure it is not a zombie
363
if self.checker is not None:
364
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
365
if pid:
366
logger.warning(u"Checker was a zombie")
367
gobject.source_remove(self.checker_callback_tag)
368
self.checker_callback(pid, status,
369
self.current_checker_command)
370
# Start a new checker if needed
371
325
if self.checker is None:
372
326
try:
373
# In case checker_command has exactly one % operator
374
command = self.checker_command % self.host
327
# In case check_command has exactly one % operator
328
command = self.check_command % self.fqdn
375
329
except TypeError:
376
330
# Escape attributes for the shell
377
escaped_attrs = dict((key,
378
re.escape(unicode(str(val),
379
errors=
380
u'replace')))
331
escaped_attrs = dict((key, re.escape(str(val)))
381
332
for key, val in
382
333
vars(self).iteritems())
383
334
try:
384
command = self.checker_command % escaped_attrs
335
command = self.check_command % escaped_attrs
385
336
except TypeError, error:
386
337
logger.error(u'Could not format string "%s":'
387
u' %s', self.checker_command, error)
338
u' %s', self.check_command, error)
388
339
return True # Try again later
389
self.current_checker_command = command
390
340
try:
391
logger.info(u"Starting checker %r for %s",
392
command, self.name)
393
# We don't need to redirect stdout and stderr, since
394
# in normal mode, that is already done by daemon(),
395
# and in debug mode we don't want to. (Stdin is
396
# always replaced by /dev/null.)
341
logger.debug(u"Starting checker %r for %s",
342
command, self.name)
397
343
self.checker = subprocess.Popen(command,
398
344
close_fds=True,
399
shell=True, cwd=u"/")
400
self.checker_callback_tag = (gobject.child_watch_add
401
(self.checker.pid,
402
self.checker_callback,
403
data=command))
404
# The checker may have completed before the gobject
405
# watch was added. Check for this.
406
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
407
if pid:
408
gobject.source_remove(self.checker_callback_tag)
409
self.checker_callback(pid, status, command)
410
except OSError, error:
345
shell=True, cwd="/")
346
self.checker_callback_tag = gobject.child_watch_add\
347
(self.checker.pid,
348
self.checker_callback)
349
except subprocess.OSError, error:
411
350
logger.error(u"Failed to start subprocess: %s",
412
351
error)
413
352
# Re-run this periodically if run by gobject.timeout_add
414
353
return True
415
416
354
def stop_checker(self):
417
355
"""Force the checker process, if any, to stop."""
418
356
if self.checker_callback_tag:
419
357
gobject.source_remove(self.checker_callback_tag)
420
358
self.checker_callback_tag = None
421
if getattr(self, u"checker", None) is None:
359
if getattr(self, "checker", None) is None:
422
360
return
423
logger.debug(u"Stopping checker for %(name)s", vars(self))
361
logger.debug("Stopping checker for %(name)s", vars(self))
424
362
try:
425
363
os.kill(self.checker.pid, signal.SIGTERM)
426
364
#os.sleep(0.5)
430
368
if error.errno != errno.ESRCH: # No such process
431
369
raise
432
370
self.checker = None
433
434
371
def still_valid(self):
435
372
"""Has the timeout not yet passed for this client?"""
436
if not getattr(self, u"enabled", False):
437
return False
438
now = datetime.datetime.utcnow()
373
now = datetime.datetime.now()
439
374
if self.last_checked_ok is None:
440
375
return now < (self.created + self.timeout)
441
376
else:
442
377
return now < (self.last_checked_ok + self.timeout)
443
378
444
379
445
class ClientDBus(Client, dbus.service.Object):
446
"""A Client class using D-Bus
447
448
Attributes:
449
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
450
"""
451
# dbus.service.Object doesn't use super(), so we can't either.
452
453
def __init__(self, *args, **kwargs):
454
Client.__init__(self, *args, **kwargs)
455
# Only now, when this client is initialized, can it show up on
456
# the D-Bus
457
self.dbus_object_path = (dbus.ObjectPath
458
(u"/clients/"
459
+ self.name.replace(u".", u"_")))
460
dbus.service.Object.__init__(self, bus,
461
self.dbus_object_path)
462
def enable(self):
463
oldstate = getattr(self, u"enabled", False)
464
r = Client.enable(self)
465
if oldstate != self.enabled:
466
# Emit D-Bus signals
467
self.PropertyChanged(dbus.String(u"enabled"),
468
dbus.Boolean(True, variant_level=1))
469
self.PropertyChanged(dbus.String(u"last_enabled"),
470
(_datetime_to_dbus(self.last_enabled,
471
variant_level=1)))
472
return r
473
474
def disable(self, signal = True):
475
oldstate = getattr(self, u"enabled", False)
476
r = Client.disable(self)
477
if signal and oldstate != self.enabled:
478
# Emit D-Bus signal
479
self.PropertyChanged(dbus.String(u"enabled"),
480
dbus.Boolean(False, variant_level=1))
481
return r
482
483
def __del__(self, *args, **kwargs):
484
try:
485
self.remove_from_connection()
486
except LookupError:
487
pass
488
if hasattr(dbus.service.Object, u"__del__"):
489
dbus.service.Object.__del__(self, *args, **kwargs)
490
Client.__del__(self, *args, **kwargs)
491
492
def checker_callback(self, pid, condition, command,
493
*args, **kwargs):
494
self.checker_callback_tag = None
495
self.checker = None
496
# Emit D-Bus signal
497
self.PropertyChanged(dbus.String(u"checker_running"),
498
dbus.Boolean(False, variant_level=1))
499
if os.WIFEXITED(condition):
500
exitstatus = os.WEXITSTATUS(condition)
501
# Emit D-Bus signal
502
self.CheckerCompleted(dbus.Int16(exitstatus),
503
dbus.Int64(condition),
504
dbus.String(command))
505
else:
506
# Emit D-Bus signal
507
self.CheckerCompleted(dbus.Int16(-1),
508
dbus.Int64(condition),
509
dbus.String(command))
510
511
return Client.checker_callback(self, pid, condition, command,
512
*args, **kwargs)
513
514
def checked_ok(self, *args, **kwargs):
515
r = Client.checked_ok(self, *args, **kwargs)
516
# Emit D-Bus signal
517
self.PropertyChanged(
518
dbus.String(u"last_checked_ok"),
519
(_datetime_to_dbus(self.last_checked_ok,
520
variant_level=1)))
521
return r
522
523
def start_checker(self, *args, **kwargs):
524
old_checker = self.checker
525
if self.checker is not None:
526
old_checker_pid = self.checker.pid
527
else:
528
old_checker_pid = None
529
r = Client.start_checker(self, *args, **kwargs)
530
# Only if new checker process was started
531
if (self.checker is not None
532
and old_checker_pid != self.checker.pid):
533
# Emit D-Bus signal
534
self.CheckerStarted(self.current_checker_command)
535
self.PropertyChanged(
536
dbus.String(u"checker_running"),
537
dbus.Boolean(True, variant_level=1))
538
return r
539
540
def stop_checker(self, *args, **kwargs):
541
old_checker = getattr(self, u"checker", None)
542
r = Client.stop_checker(self, *args, **kwargs)
543
if (old_checker is not None
544
and getattr(self, u"checker", None) is None):
545
self.PropertyChanged(dbus.String(u"checker_running"),
546
dbus.Boolean(False, variant_level=1))
547
return r
548
549
## D-Bus methods & signals
550
_interface = u"se.bsnet.fukt.Mandos.Client"
551
552
# CheckedOK - method
553
@dbus.service.method(_interface)
554
def CheckedOK(self):
555
return self.checked_ok()
556
557
# CheckerCompleted - signal
558
@dbus.service.signal(_interface, signature=u"nxs")
559
def CheckerCompleted(self, exitcode, waitstatus, command):
560
"D-Bus signal"
561
pass
562
563
# CheckerStarted - signal
564
@dbus.service.signal(_interface, signature=u"s")
565
def CheckerStarted(self, command):
566
"D-Bus signal"
567
pass
568
569
# GetAllProperties - method
570
@dbus.service.method(_interface, out_signature=u"a{sv}")
571
def GetAllProperties(self):
572
"D-Bus method"
573
return dbus.Dictionary({
574
dbus.String(u"name"):
575
dbus.String(self.name, variant_level=1),
576
dbus.String(u"fingerprint"):
577
dbus.String(self.fingerprint, variant_level=1),
578
dbus.String(u"host"):
579
dbus.String(self.host, variant_level=1),
580
dbus.String(u"created"):
581
_datetime_to_dbus(self.created, variant_level=1),
582
dbus.String(u"last_enabled"):
583
(_datetime_to_dbus(self.last_enabled,
584
variant_level=1)
585
if self.last_enabled is not None
586
else dbus.Boolean(False, variant_level=1)),
587
dbus.String(u"enabled"):
588
dbus.Boolean(self.enabled, variant_level=1),
589
dbus.String(u"last_checked_ok"):
590
(_datetime_to_dbus(self.last_checked_ok,
591
variant_level=1)
592
if self.last_checked_ok is not None
593
else dbus.Boolean (False, variant_level=1)),
594
dbus.String(u"timeout"):
595
dbus.UInt64(self.timeout_milliseconds(),
596
variant_level=1),
597
dbus.String(u"interval"):
598
dbus.UInt64(self.interval_milliseconds(),
599
variant_level=1),
600
dbus.String(u"checker"):
601
dbus.String(self.checker_command,
602
variant_level=1),
603
dbus.String(u"checker_running"):
604
dbus.Boolean(self.checker is not None,
605
variant_level=1),
606
dbus.String(u"object_path"):
607
dbus.ObjectPath(self.dbus_object_path,
608
variant_level=1)
609
}, signature=u"sv")
610
611
# IsStillValid - method
612
@dbus.service.method(_interface, out_signature=u"b")
613
def IsStillValid(self):
614
return self.still_valid()
615
616
# PropertyChanged - signal
617
@dbus.service.signal(_interface, signature=u"sv")
618
def PropertyChanged(self, property, value):
619
"D-Bus signal"
620
pass
621
622
# ReceivedSecret - signal
623
@dbus.service.signal(_interface)
624
def ReceivedSecret(self):
625
"D-Bus signal"
626
pass
627
628
# Rejected - signal
629
@dbus.service.signal(_interface)
630
def Rejected(self):
631
"D-Bus signal"
632
pass
633
634
# SetChecker - method
635
@dbus.service.method(_interface, in_signature=u"s")
636
def SetChecker(self, checker):
637
"D-Bus setter method"
638
self.checker_command = checker
639
# Emit D-Bus signal
640
self.PropertyChanged(dbus.String(u"checker"),
641
dbus.String(self.checker_command,
642
variant_level=1))
643
644
# SetHost - method
645
@dbus.service.method(_interface, in_signature=u"s")
646
def SetHost(self, host):
647
"D-Bus setter method"
648
self.host = host
649
# Emit D-Bus signal
650
self.PropertyChanged(dbus.String(u"host"),
651
dbus.String(self.host, variant_level=1))
652
653
# SetInterval - method
654
@dbus.service.method(_interface, in_signature=u"t")
655
def SetInterval(self, milliseconds):
656
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
657
# Emit D-Bus signal
658
self.PropertyChanged(dbus.String(u"interval"),
659
(dbus.UInt64(self.interval_milliseconds(),
660
variant_level=1)))
661
662
# SetSecret - method
663
@dbus.service.method(_interface, in_signature=u"ay",
664
byte_arrays=True)
665
def SetSecret(self, secret):
666
"D-Bus setter method"
667
self.secret = str(secret)
668
669
# SetTimeout - method
670
@dbus.service.method(_interface, in_signature=u"t")
671
def SetTimeout(self, milliseconds):
672
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
673
# Emit D-Bus signal
674
self.PropertyChanged(dbus.String(u"timeout"),
675
(dbus.UInt64(self.timeout_milliseconds(),
676
variant_level=1)))
677
678
# Enable - method
679
@dbus.service.method(_interface)
680
def Enable(self):
681
"D-Bus method"
682
self.enable()
683
684
# StartChecker - method
685
@dbus.service.method(_interface)
686
def StartChecker(self):
687
"D-Bus method"
688
self.start_checker()
689
690
# Disable - method
691
@dbus.service.method(_interface)
692
def Disable(self):
693
"D-Bus method"
694
self.disable()
695
696
# StopChecker - method
697
@dbus.service.method(_interface)
698
def StopChecker(self):
699
self.stop_checker()
700
701
del _interface
702
703
704
class ClientHandler(socketserver.BaseRequestHandler, object):
705
"""A class to handle client connections.
706
707
Instantiated once for each connection to handle it.
380
def peer_certificate(session):
381
"Return the peer's OpenPGP certificate as a bytestring"
382
# If not an OpenPGP certificate...
383
if gnutls.library.functions.gnutls_certificate_type_get\
384
(session._c_object) \
385
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
386
# ...do the normal thing
387
return session.peer_certificate
388
list_size = ctypes.c_uint()
389
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
390
(session._c_object, ctypes.byref(list_size))
391
if list_size.value == 0:
392
return None
393
cert = cert_list[0]
394
return ctypes.string_at(cert.data, cert.size)
395
396
397
def fingerprint(openpgp):
398
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
399
# New empty GnuTLS certificate
400
crt = gnutls.library.types.gnutls_openpgp_crt_t()
401
gnutls.library.functions.gnutls_openpgp_crt_init\
402
(ctypes.byref(crt))
403
# New GnuTLS "datum" with the OpenPGP public key
404
datum = gnutls.library.types.gnutls_datum_t\
405
(ctypes.cast(ctypes.c_char_p(openpgp),
406
ctypes.POINTER(ctypes.c_ubyte)),
407
ctypes.c_uint(len(openpgp)))
408
# Import the OpenPGP public key into the certificate
409
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
410
(crt,
411
ctypes.byref(datum),
412
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
413
# New buffer for the fingerprint
414
buffer = ctypes.create_string_buffer(20)
415
buffer_length = ctypes.c_size_t()
416
# Get the fingerprint from the certificate into the buffer
417
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
418
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
419
# Deinit the certificate
420
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
421
# Convert the buffer to a Python bytestring
422
fpr = ctypes.string_at(buffer, buffer_length.value)
423
# Convert the bytestring to hexadecimal notation
424
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
425
return hex_fpr
426
427
428
class tcp_handler(SocketServer.BaseRequestHandler, object):
429
"""A TCP request handler class.
430
Instantiated by IPv6_TCPServer for each request to handle it.
708
431
Note: This will run in its own forked process."""
709
432
710
433
def handle(self):
711
logger.info(u"TCP connection from: %s",
712
unicode(self.client_address))
713
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
714
# Open IPC pipe to parent process
715
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
716
session = (gnutls.connection
717
.ClientSession(self.request,
718
gnutls.connection
719
.X509Credentials()))
720
721
line = self.request.makefile().readline()
722
logger.debug(u"Protocol version: %r", line)
723
try:
724
if int(line.strip().split()[0]) > 1:
725
raise RuntimeError
726
except (ValueError, IndexError, RuntimeError), error:
727
logger.error(u"Unknown protocol version: %s", error)
728
return
729
730
# Note: gnutls.connection.X509Credentials is really a
731
# generic GnuTLS certificate credentials object so long as
732
# no X.509 keys are added to it. Therefore, we can use it
733
# here despite using OpenPGP certificates.
734
735
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
736
# u"+AES-256-CBC", u"+SHA1",
737
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
738
# u"+DHE-DSS"))
739
# Use a fallback default, since this MUST be set.
740
priority = self.server.gnutls_priority
741
if priority is None:
742
priority = u"NORMAL"
743
(gnutls.library.functions
744
.gnutls_priority_set_direct(session._c_object,
745
priority, None))
746
747
try:
748
session.handshake()
749
except gnutls.errors.GNUTLSError, error:
750
logger.warning(u"Handshake failed: %s", error)
751
# Do not run session.bye() here: the session is not
752
# established. Just abandon the request.
753
return
754
logger.debug(u"Handshake succeeded")
755
try:
756
fpr = self.fingerprint(self.peer_certificate(session))
757
except (TypeError, gnutls.errors.GNUTLSError), error:
758
logger.warning(u"Bad certificate: %s", error)
759
session.bye()
760
return
761
logger.debug(u"Fingerprint: %s", fpr)
762
763
for c in self.server.clients:
764
if c.fingerprint == fpr:
765
client = c
766
break
767
else:
768
ipc.write(u"NOTFOUND %s\n" % fpr)
769
session.bye()
770
return
771
# Have to check if client.still_valid(), since it is
772
# possible that the client timed out while establishing
773
# the GnuTLS session.
774
if not client.still_valid():
775
ipc.write(u"INVALID %s\n" % client.name)
776
session.bye()
777
return
778
ipc.write(u"SENDING %s\n" % client.name)
779
sent_size = 0
780
while sent_size < len(client.secret):
781
sent = session.send(client.secret[sent_size:])
782
logger.debug(u"Sent: %d, remaining: %d",
783
sent, len(client.secret)
784
- (sent_size + sent))
785
sent_size += sent
786
session.bye()
787
788
@staticmethod
789
def peer_certificate(session):
790
"Return the peer's OpenPGP certificate as a bytestring"
791
# If not an OpenPGP certificate...
792
if (gnutls.library.functions
793
.gnutls_certificate_type_get(session._c_object)
794
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
795
# ...do the normal thing
796
return session.peer_certificate
797
list_size = ctypes.c_uint(1)
798
cert_list = (gnutls.library.functions
799
.gnutls_certificate_get_peers
800
(session._c_object, ctypes.byref(list_size)))
801
if not bool(cert_list) and list_size.value != 0:
802
raise gnutls.errors.GNUTLSError(u"error getting peer"
803
u" certificate")
804
if list_size.value == 0:
805
return None
806
cert = cert_list[0]
807
return ctypes.string_at(cert.data, cert.size)
808
809
@staticmethod
810
def fingerprint(openpgp):
811
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
812
# New GnuTLS "datum" with the OpenPGP public key
813
datum = (gnutls.library.types
814
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
815
ctypes.POINTER
816
(ctypes.c_ubyte)),
817
ctypes.c_uint(len(openpgp))))
818
# New empty GnuTLS certificate
819
crt = gnutls.library.types.gnutls_openpgp_crt_t()
820
(gnutls.library.functions
821
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
822
# Import the OpenPGP public key into the certificate
823
(gnutls.library.functions
824
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
825
gnutls.library.constants
826
.GNUTLS_OPENPGP_FMT_RAW))
827
# Verify the self signature in the key
828
crtverify = ctypes.c_uint()
829
(gnutls.library.functions
830
.gnutls_openpgp_crt_verify_self(crt, 0,
831
ctypes.byref(crtverify)))
832
if crtverify.value != 0:
833
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
834
raise (gnutls.errors.CertificateSecurityError
835
(u"Verify failed"))
836
# New buffer for the fingerprint
837
buf = ctypes.create_string_buffer(20)
838
buf_len = ctypes.c_size_t()
839
# Get the fingerprint from the certificate into the buffer
840
(gnutls.library.functions
841
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
842
ctypes.byref(buf_len)))
843
# Deinit the certificate
844
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
845
# Convert the buffer to a Python bytestring
846
fpr = ctypes.string_at(buf, buf_len.value)
847
# Convert the bytestring to hexadecimal notation
848
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
849
return hex_fpr
850
851
852
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
853
"""Like socketserver.ForkingMixIn, but also pass a pipe.
854
855
Assumes a gobject.MainLoop event loop.
856
"""
857
def process_request(self, request, client_address):
858
"""Overrides and wraps the original process_request().
859
860
This function creates a new pipe in self.pipe
861
"""
862
self.pipe = os.pipe()
863
super(ForkingMixInWithPipe,
864
self).process_request(request, client_address)
865
os.close(self.pipe[1]) # close write end
866
# Call "handle_ipc" for both data and EOF events
867
gobject.io_add_watch(self.pipe[0],
868
gobject.IO_IN | gobject.IO_HUP,
869
self.handle_ipc)
870
def handle_ipc(source, condition):
871
"""Dummy function; override as necessary"""
872
os.close(source)
873
return False
874
875
876
class IPv6_TCPServer(ForkingMixInWithPipe,
877
socketserver.TCPServer, object):
878
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
879
434
logger.debug(u"TCP connection from: %s",
435
unicode(self.client_address))
436
session = gnutls.connection.ClientSession\
437
(self.request, gnutls.connection.X509Credentials())
438
# Note: gnutls.connection.X509Credentials is really a generic
439
# GnuTLS certificate credentials object so long as no X.509
440
# keys are added to it. Therefore, we can use it here despite
441
# using OpenPGP certificates.
442
443
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
444
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
445
# "+DHE-DSS"))
446
priority = "NORMAL" # Fallback default, since this
447
# MUST be set.
448
if self.server.settings["priority"]:
449
priority = self.server.settings["priority"]
450
gnutls.library.functions.gnutls_priority_set_direct\
451
(session._c_object, priority, None);
452
453
try:
454
session.handshake()
455
except gnutls.errors.GNUTLSError, error:
456
logger.debug(u"Handshake failed: %s", error)
457
# Do not run session.bye() here: the session is not
458
# established. Just abandon the request.
459
return
460
try:
461
fpr = fingerprint(peer_certificate(session))
462
except (TypeError, gnutls.errors.GNUTLSError), error:
463
logger.debug(u"Bad certificate: %s", error)
464
session.bye()
465
return
466
logger.debug(u"Fingerprint: %s", fpr)
467
client = None
468
for c in self.server.clients:
469
if c.fingerprint == fpr:
470
client = c
471
break
472
if not client:
473
logger.debug(u"Client not found for fingerprint: %s", fpr)
474
session.bye()
475
return
476
# Have to check if client.still_valid(), since it is possible
477
# that the client timed out while establishing the GnuTLS
478
# session.
479
if not client.still_valid():
480
logger.debug(u"Client %(name)s is invalid", vars(client))
481
session.bye()
482
return
483
sent_size = 0
484
while sent_size < len(client.secret):
485
sent = session.send(client.secret[sent_size:])
486
logger.debug(u"Sent: %d, remaining: %d",
487
sent, len(client.secret)
488
- (sent_size + sent))
489
sent_size += sent
490
session.bye()
491
492
493
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
494
"""IPv6 TCP server. Accepts 'None' as address and/or port.
880
495
Attributes:
881
enabled: Boolean; whether this server is activated yet
882
interface: None or a network interface name (string)
883
use_ipv6: Boolean; to use IPv6 or not
884
----
885
clients: set of Client objects
886
gnutls_priority GnuTLS priority string
887
use_dbus: Boolean; to emit D-Bus signals or not
496
settings: Server settings
497
clients: Set() of Client objects
888
498
"""
889
def __init__(self, server_address, RequestHandlerClass,
890
interface=None, use_ipv6=True, clients=None,
891
gnutls_priority=None, use_dbus=True):
892
self.enabled = False
893
self.interface = interface
894
if use_ipv6:
895
self.address_family = socket.AF_INET6
896
self.clients = clients
897
self.use_dbus = use_dbus
898
self.gnutls_priority = gnutls_priority
899
socketserver.TCPServer.__init__(self, server_address,
900
RequestHandlerClass)
499
address_family = socket.AF_INET6
500
def __init__(self, *args, **kwargs):
501
if "settings" in kwargs:
502
self.settings = kwargs["settings"]
503
del kwargs["settings"]
504
if "clients" in kwargs:
505
self.clients = kwargs["clients"]
506
del kwargs["clients"]
507
return super(type(self), self).__init__(*args, **kwargs)
901
508
def server_bind(self):
902
509
"""This overrides the normal server_bind() function
903
510
to bind to an interface if one was specified, and also NOT to
904
511
bind to an address or port if they were not specified."""
905
if self.interface is not None:
512
if self.settings["interface"]:
513
# 25 is from /usr/include/asm-i486/socket.h
514
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
906
515
try:
907
516
self.socket.setsockopt(socket.SOL_SOCKET,
908
517
SO_BINDTODEVICE,
909
str(self.interface + u'\0'))
518
self.settings["interface"])
910
519
except socket.error, error:
911
520
if error[0] == errno.EPERM:
912
logger.error(u"No permission to"
913
u" bind to interface %s",
914
self.interface)
521
logger.warning(u"No permission to"
522
u" bind to interface %s",
523
self.settings["interface"])
915
524
else:
916
raise
525
raise error
917
526
# Only bind(2) the socket if we really need to.
918
527
if self.server_address[0] or self.server_address[1]:
919
528
if not self.server_address[0]:
920
if self.address_family == socket.AF_INET6:
921
any_address = u"::" # in6addr_any
922
else:
923
any_address = socket.INADDR_ANY
924
self.server_address = (any_address,
529
in6addr_any = "::"
530
self.server_address = (in6addr_any,
925
531
self.server_address[1])
926
elif not self.server_address[1]:
532
elif self.server_address[1] is None:
927
533
self.server_address = (self.server_address[0],
928
534
0)
929
# if self.interface:
930
# self.server_address = (self.server_address[0],
931
# 0, # port
932
# 0, # flowinfo
933
# if_nametoindex
934
# (self.interface))
935
return socketserver.TCPServer.server_bind(self)
936
def server_activate(self):
937
if self.enabled:
938
return socketserver.TCPServer.server_activate(self)
939
def enable(self):
940
self.enabled = True
941
def handle_ipc(self, source, condition, file_objects={}):
942
condition_names = {
943
gobject.IO_IN: u"IN", # There is data to read.
944
gobject.IO_OUT: u"OUT", # Data can be written (without
945
# blocking).
946
gobject.IO_PRI: u"PRI", # There is urgent data to read.
947
gobject.IO_ERR: u"ERR", # Error condition.
948
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
949
# broken, usually for pipes and
950
# sockets).
951
}
952
conditions_string = ' | '.join(name
953
for cond, name in
954
condition_names.iteritems()
955
if cond & condition)
956
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
957
conditions_string)
958
959
# Turn the pipe file descriptor into a Python file object
960
if source not in file_objects:
961
file_objects[source] = os.fdopen(source, u"r", 1)
962
963
# Read a line from the file object
964
cmdline = file_objects[source].readline()
965
if not cmdline: # Empty line means end of file
966
# close the IPC pipe
967
file_objects[source].close()
968
del file_objects[source]
969
970
# Stop calling this function
971
return False
972
973
logger.debug(u"IPC command: %r", cmdline)
974
975
# Parse and act on command
976
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
977
978
if cmd == u"NOTFOUND":
979
logger.warning(u"Client not found for fingerprint: %s",
980
args)
981
if self.use_dbus:
982
# Emit D-Bus signal
983
mandos_dbus_service.ClientNotFound(args)
984
elif cmd == u"INVALID":
985
for client in self.clients:
986
if client.name == args:
987
logger.warning(u"Client %s is invalid", args)
988
if self.use_dbus:
989
# Emit D-Bus signal
990
client.Rejected()
991
break
992
else:
993
logger.error(u"Unknown client %s is invalid", args)
994
elif cmd == u"SENDING":
995
for client in self.clients:
996
if client.name == args:
997
logger.info(u"Sending secret to %s", client.name)
998
client.checked_ok()
999
if self.use_dbus:
1000
# Emit D-Bus signal
1001
client.ReceivedSecret()
1002
break
1003
else:
1004
logger.error(u"Sending secret to unknown client %s",
1005
args)
1006
else:
1007
logger.error(u"Unknown IPC command: %r", cmdline)
1008
1009
# Keep calling this function
1010
return True
535
return super(type(self), self).server_bind()
1011
536
1012
537
1013
538
def string_to_delta(interval):
1014
539
"""Parse a string and return a datetime.timedelta
1015
1016
>>> string_to_delta(u'7d')
540
541
>>> string_to_delta('7d')
1017
542
datetime.timedelta(7)
1018
>>> string_to_delta(u'60s')
543
>>> string_to_delta('60s')
1019
544
datetime.timedelta(0, 60)
1020
>>> string_to_delta(u'60m')
545
>>> string_to_delta('60m')
1021
546
datetime.timedelta(0, 3600)
1022
>>> string_to_delta(u'24h')
547
>>> string_to_delta('24h')
1023
548
datetime.timedelta(1)
1024
549
>>> string_to_delta(u'1w')
1025
550
datetime.timedelta(7)
1026
>>> string_to_delta(u'5m 30s')
1027
datetime.timedelta(0, 330)
1028
551
"""
1029
timevalue = datetime.timedelta(0)
1030
for s in interval.split():
1031
try:
1032
suffix = unicode(s[-1])
1033
value = int(s[:-1])
1034
if suffix == u"d":
1035
delta = datetime.timedelta(value)
1036
elif suffix == u"s":
1037
delta = datetime.timedelta(0, value)
1038
elif suffix == u"m":
1039
delta = datetime.timedelta(0, 0, 0, 0, value)
1040
elif suffix == u"h":
1041
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1042
elif suffix == u"w":
1043
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1044
else:
1045
raise ValueError
1046
except (ValueError, IndexError):
552
try:
553
suffix=unicode(interval[-1])
554
value=int(interval[:-1])
555
if suffix == u"d":
556
delta = datetime.timedelta(value)
557
elif suffix == u"s":
558
delta = datetime.timedelta(0, value)
559
elif suffix == u"m":
560
delta = datetime.timedelta(0, 0, 0, 0, value)
561
elif suffix == u"h":
562
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
563
elif suffix == u"w":
564
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
565
else:
1047
566
raise ValueError
1048
timevalue += delta
1049
return timevalue
567
except (ValueError, IndexError):
568
raise ValueError
569
return delta
1050
570
1051
571
1052
572
def server_state_changed(state):
1053
573
"""Derived from the Avahi example code"""
1054
574
if state == avahi.SERVER_COLLISION:
1055
logger.error(u"Zeroconf server name collision")
575
logger.warning(u"Server name collision")
1056
576
service.remove()
1057
577
elif state == avahi.SERVER_RUNNING:
1058
578
service.add()
1060
580
1061
581
def entry_group_state_changed(state, error):
1062
582
"""Derived from the Avahi example code"""
1063
logger.debug(u"Avahi state change: %i", state)
583
logger.debug(u"state change: %i", state)
1064
584
1065
585
if state == avahi.ENTRY_GROUP_ESTABLISHED:
1066
logger.debug(u"Zeroconf service established.")
586
logger.debug(u"Service established.")
1067
587
elif state == avahi.ENTRY_GROUP_COLLISION:
1068
logger.warning(u"Zeroconf service name collision.")
588
logger.warning(u"Service name collision.")
1069
589
service.rename()
1070
590
elif state == avahi.ENTRY_GROUP_FAILURE:
1071
logger.critical(u"Avahi: Error in group state changed %s",
591
logger.critical(u"Error in group state changed %s",
1072
592
unicode(error))
1073
raise AvahiGroupError(u"State changed: %s" % unicode(error))
593
raise AvahiGroupError("State changed: %s", str(error))
1074
594
1075
def if_nametoindex(interface):
1076
"""Call the C function if_nametoindex(), or equivalent
1077
1078
Note: This function cannot accept a unicode string."""
1079
global if_nametoindex
595
def if_nametoindex(interface, _func=[None]):
596
"""Call the C function if_nametoindex(), or equivalent"""
597
if _func[0] is not None:
598
return _func[0](interface)
1080
599
try:
1081
if_nametoindex = (ctypes.cdll.LoadLibrary
1082
(ctypes.util.find_library(u"c"))
1083
.if_nametoindex)
600
if "ctypes.util" not in sys.modules:
601
import ctypes.util
602
while True:
603
try:
604
libc = ctypes.cdll.LoadLibrary\
605
(ctypes.util.find_library("c"))
606
_func[0] = libc.if_nametoindex
607
return _func[0](interface)
608
except IOError, e:
609
if e != errno.EINTR:
610
raise
1084
611
except (OSError, AttributeError):
1085
logger.warning(u"Doing if_nametoindex the hard way")
1086
def if_nametoindex(interface):
612
if "struct" not in sys.modules:
613
import struct
614
if "fcntl" not in sys.modules:
615
import fcntl
616
def the_hard_way(interface):
1087
617
"Get an interface index the hard way, i.e. using fcntl()"
1088
618
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1089
with closing(socket.socket()) as s:
1090
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1091
struct.pack(str(u"16s16x"),
1092
interface))
1093
interface_index = struct.unpack(str(u"I"),
1094
ifreq[16:20])[0]
619
s = socket.socket()
620
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
621
struct.pack("16s16x", interface))
622
s.close()
623
interface_index = struct.unpack("I", ifreq[16:20])[0]
1095
624
return interface_index
1096
return if_nametoindex(interface)
1097
1098
1099
def daemon(nochdir = False, noclose = False):
625
_func[0] = the_hard_way
626
return _func[0](interface)
627
628
629
def daemon(nochdir, noclose):
1100
630
"""See daemon(3). Standard BSD Unix function.
1101
1102
631
This should really exist as os.daemon, but it doesn't (yet)."""
1103
632
if os.fork():
1104
633
sys.exit()
1105
634
os.setsid()
1106
635
if not nochdir:
1107
os.chdir(u"/")
1108
if os.fork():
1109
sys.exit()
636
os.chdir("/")
1110
637
if not noclose:
1111
638
# Close all standard open file descriptors
1112
639
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1113
640
if not stat.S_ISCHR(os.fstat(null).st_mode):
1114
641
raise OSError(errno.ENODEV,
1115
u"/dev/null not a character device")
642
"/dev/null not a character device")
1116
643
os.dup2(null, sys.stdin.fileno())
1117
644
os.dup2(null, sys.stdout.fileno())
1118
645
os.dup2(null, sys.stderr.fileno())
1121
648
1122
649
1123
650
def main():
1124
1125
######################################################################
1126
# Parsing of options, both command line and config file
1127
1128
parser = optparse.OptionParser(version = "%%prog %s" % version)
1129
parser.add_option("-i", u"--interface", type=u"string",
1130
metavar="IF", help=u"Bind to interface IF")
1131
parser.add_option("-a", u"--address", type=u"string",
1132
help=u"Address to listen for requests on")
1133
parser.add_option("-p", u"--port", type=u"int",
1134
help=u"Port number to receive requests on")
1135
parser.add_option("--check", action=u"store_true",
1136
help=u"Run self-test")
1137
parser.add_option("--debug", action=u"store_true",
1138
help=u"Debug mode; run in foreground and log to"
1139
u" terminal")
1140
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1141
u" priority string (see GnuTLS documentation)")
1142
parser.add_option("--servicename", type=u"string",
1143
metavar=u"NAME", help=u"Zeroconf service name")
1144
parser.add_option("--configdir", type=u"string",
1145
default=u"/etc/mandos", metavar=u"DIR",
1146
help=u"Directory to search for configuration"
1147
u" files")
1148
parser.add_option("--no-dbus", action=u"store_false",
1149
dest=u"use_dbus", help=u"Do not provide D-Bus"
1150
u" system bus interface")
1151
parser.add_option("--no-ipv6", action=u"store_false",
1152
dest=u"use_ipv6", help=u"Do not use IPv6")
1153
options = parser.parse_args()[0]
651
global main_loop_started
652
main_loop_started = False
653
654
parser = OptionParser()
655
parser.add_option("-i", "--interface", type="string",
656
metavar="IF", help="Bind to interface IF")
657
parser.add_option("-a", "--address", type="string",
658
help="Address to listen for requests on")
659
parser.add_option("-p", "--port", type="int",
660
help="Port number to receive requests on")
661
parser.add_option("--check", action="store_true", default=False,
662
help="Run self-test")
663
parser.add_option("--debug", action="store_true", default=False,
664
help="Debug mode; run in foreground and log to"
665
" terminal")
666
parser.add_option("--priority", type="string", help="GnuTLS"
667
" priority string (see GnuTLS documentation)")
668
parser.add_option("--servicename", type="string", metavar="NAME",
669
help="Zeroconf service name")
670
parser.add_option("--configdir", type="string",
671
default="/etc/mandos", metavar="DIR",
672
help="Directory to search for configuration"
673
" files")
674
(options, args) = parser.parse_args()
1154
675
1155
676
if options.check:
1156
677
import doctest
1158
679
sys.exit()
1159
680
1160
681
# Default values for config file for server-global settings
1161
server_defaults = { u"interface": u"",
1162
u"address": u"",
1163
u"port": u"",
1164
u"debug": u"False",
1165
u"priority":
1166
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1167
u"servicename": u"Mandos",
1168
u"use_dbus": u"True",
1169
u"use_ipv6": u"True",
682
server_defaults = { "interface": "",
683
"address": "",
684
"port": "",
685
"debug": "False",
686
"priority":
687
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
688
"servicename": "Mandos",
1170
689
}
1171
690
1172
691
# Parse config file for server-global settings
1173
server_config = configparser.SafeConfigParser(server_defaults)
692
server_config = ConfigParser.SafeConfigParser(server_defaults)
1174
693
del server_defaults
1175
server_config.read(os.path.join(options.configdir,
1176
u"mandos.conf"))
694
server_config.read(os.path.join(options.configdir, "server.conf"))
695
server_section = "server"
1177
696
# Convert the SafeConfigParser object to a dict
1178
server_settings = server_config.defaults()
1179
# Use the appropriate methods on the non-string config options
1180
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1181
server_settings[option] = server_config.getboolean(u"DEFAULT",
1182
option)
1183
if server_settings["port"]:
1184
server_settings["port"] = server_config.getint(u"DEFAULT",
1185
u"port")
697
server_settings = dict(server_config.items(server_section))
698
# Use getboolean on the boolean config option
699
server_settings["debug"] = server_config.getboolean\
700
(server_section, "debug")
1186
701
del server_config
1187
702
1188
703
# Override the settings from the config file with command line
1189
704
# options, if set.
1190
for option in (u"interface", u"address", u"port", u"debug",
1191
u"priority", u"servicename", u"configdir",
1192
u"use_dbus", u"use_ipv6"):
705
for option in ("interface", "address", "port", "debug",
706
"priority", "servicename", "configdir"):
1193
707
value = getattr(options, option)
1194
708
if value is not None:
1195
709
server_settings[option] = value
1196
710
del options
1197
# Force all strings to be unicode
1198
for option in server_settings.keys():
1199
if type(server_settings[option]) is str:
1200
server_settings[option] = unicode(server_settings[option])
1201
711
# Now we have our good server settings in "server_settings"
1202
712
1203
##################################################################
1204
1205
# For convenience
1206
debug = server_settings[u"debug"]
1207
use_dbus = server_settings[u"use_dbus"]
1208
use_ipv6 = server_settings[u"use_ipv6"]
1209
1210
if not debug:
1211
syslogger.setLevel(logging.WARNING)
1212
console.setLevel(logging.WARNING)
1213
1214
if server_settings[u"servicename"] != u"Mandos":
1215
syslogger.setFormatter(logging.Formatter
1216
(u'Mandos (%s) [%%(process)d]:'
1217
u' %%(levelname)s: %%(message)s'
1218
% server_settings[u"servicename"]))
1219
1220
713
# Parse config file with clients
1221
client_defaults = { u"timeout": u"1h",
1222
u"interval": u"5m",
1223
u"checker": u"fping -q -- %%(host)s",
1224
u"host": u"",
714
client_defaults = { "timeout": "1h",
715
"interval": "5m",
716
"checker": "fping -q -- %%(fqdn)s",
1225
717
}
1226
client_config = configparser.SafeConfigParser(client_defaults)
1227
client_config.read(os.path.join(server_settings[u"configdir"],
1228
u"clients.conf"))
1229
1230
global mandos_dbus_service
1231
mandos_dbus_service = None
1232
1233
clients = set()
1234
tcp_server = IPv6_TCPServer((server_settings[u"address"],
1235
server_settings[u"port"]),
1236
ClientHandler,
1237
interface=
1238
server_settings[u"interface"],
1239
use_ipv6=use_ipv6,
1240
clients=clients,
1241
gnutls_priority=
1242
server_settings[u"priority"],
1243
use_dbus=use_dbus)
1244
pidfilename = u"/var/run/mandos.pid"
1245
try:
1246
pidfile = open(pidfilename, u"w")
1247
except IOError:
1248
logger.error(u"Could not open file %r", pidfilename)
1249
1250
try:
1251
uid = pwd.getpwnam(u"_mandos").pw_uid
1252
gid = pwd.getpwnam(u"_mandos").pw_gid
1253
except KeyError:
1254
try:
1255
uid = pwd.getpwnam(u"mandos").pw_uid
1256
gid = pwd.getpwnam(u"mandos").pw_gid
1257
except KeyError:
1258
try:
1259
uid = pwd.getpwnam(u"nobody").pw_uid
1260
gid = pwd.getpwnam(u"nobody").pw_gid
1261
except KeyError:
1262
uid = 65534
1263
gid = 65534
1264
try:
1265
os.setgid(gid)
1266
os.setuid(uid)
1267
except OSError, error:
1268
if error[0] != errno.EPERM:
1269
raise error
1270
1271
# Enable all possible GnuTLS debugging
1272
if debug:
1273
# "Use a log level over 10 to enable all debugging options."
1274
# - GnuTLS manual
1275
gnutls.library.functions.gnutls_global_set_log_level(11)
1276
1277
@gnutls.library.types.gnutls_log_func
1278
def debug_gnutls(level, string):
1279
logger.debug(u"GnuTLS: %s", string[:-1])
1280
1281
(gnutls.library.functions
1282
.gnutls_global_set_log_function(debug_gnutls))
718
client_config = ConfigParser.SafeConfigParser(client_defaults)
719
client_config.read(os.path.join(server_settings["configdir"],
720
"clients.conf"))
1283
721
1284
722
global service
1285
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1286
service = AvahiService(name = server_settings[u"servicename"],
1287
servicetype = u"_mandos._tcp",
1288
protocol = protocol)
723
service = AvahiService(name = server_settings["servicename"],
724
type = "_mandos._tcp", );
1289
725
if server_settings["interface"]:
1290
service.interface = (if_nametoindex
1291
(str(server_settings[u"interface"])))
726
service.interface = if_nametoindex(server_settings["interface"])
1292
727
1293
728
global main_loop
1294
729
global bus
1297
732
DBusGMainLoop(set_as_default=True )
1298
733
main_loop = gobject.MainLoop()
1299
734
bus = dbus.SystemBus()
1300
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1301
avahi.DBUS_PATH_SERVER),
1302
avahi.DBUS_INTERFACE_SERVER)
735
server = dbus.Interface(
736
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
737
avahi.DBUS_INTERFACE_SERVER )
1303
738
# End of Avahi example code
1304
if use_dbus:
1305
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1306
739
1307
client_class = Client
1308
if use_dbus:
1309
client_class = ClientDBus
1310
clients.update(set(
1311
client_class(name = section,
1312
config= dict(client_config.items(section)))
1313
for section in client_config.sections()))
1314
if not clients:
1315
logger.warning(u"No clients defined")
740
debug = server_settings["debug"]
1316
741
1317
742
if debug:
1318
# Redirect stdin so all checkers get /dev/null
1319
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1320
os.dup2(null, sys.stdin.fileno())
1321
if null > 2:
1322
os.close(null)
1323
else:
1324
# No console logging
1325
logger.removeHandler(console)
1326
# Close all input and output, do double fork, etc.
1327
daemon()
1328
1329
try:
1330
with closing(pidfile):
1331
pid = os.getpid()
1332
pidfile.write(str(pid) + "\n")
1333
del pidfile
1334
except IOError:
1335
logger.error(u"Could not write to file %r with PID %d",
1336
pidfilename, pid)
1337
except NameError:
1338
# "pidfile" was never created
1339
pass
1340
del pidfilename
743
console = logging.StreamHandler()
744
# console.setLevel(logging.DEBUG)
745
console.setFormatter(logging.Formatter\
746
('%(levelname)s: %(message)s'))
747
logger.addHandler(console)
748
del console
749
750
clients = Set()
751
def remove_from_clients(client):
752
clients.remove(client)
753
if not clients:
754
logger.debug(u"No clients left, exiting")
755
sys.exit()
756
757
clients.update(Set(Client(name=section,
758
stop_hook = remove_from_clients,
759
**(dict(client_config\
760
.items(section))))
761
for section in client_config.sections()))
762
763
if not debug:
764
daemon(False, False)
1341
765
1342
766
def cleanup():
1343
767
"Cleanup function; run on exit"
1350
774
1351
775
while clients:
1352
776
client = clients.pop()
1353
client.disable_hook = None
1354
client.disable()
777
client.stop_hook = None
778
client.stop()
1355
779
1356
780
atexit.register(cleanup)
1357
781
1360
784
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1361
785
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1362
786
1363
if use_dbus:
1364
class MandosDBusService(dbus.service.Object):
1365
"""A D-Bus proxy object"""
1366
def __init__(self):
1367
dbus.service.Object.__init__(self, bus, u"/")
1368
_interface = u"se.bsnet.fukt.Mandos"
1369
1370
@dbus.service.signal(_interface, signature=u"oa{sv}")
1371
def ClientAdded(self, objpath, properties):
1372
"D-Bus signal"
1373
pass
1374
1375
@dbus.service.signal(_interface, signature=u"s")
1376
def ClientNotFound(self, fingerprint):
1377
"D-Bus signal"
1378
pass
1379
1380
@dbus.service.signal(_interface, signature=u"os")
1381
def ClientRemoved(self, objpath, name):
1382
"D-Bus signal"
1383
pass
1384
1385
@dbus.service.method(_interface, out_signature=u"ao")
1386
def GetAllClients(self):
1387
"D-Bus method"
1388
return dbus.Array(c.dbus_object_path for c in clients)
1389
1390
@dbus.service.method(_interface,
1391
out_signature=u"a{oa{sv}}")
1392
def GetAllClientsWithProperties(self):
1393
"D-Bus method"
1394
return dbus.Dictionary(
1395
((c.dbus_object_path, c.GetAllProperties())
1396
for c in clients),
1397
signature=u"oa{sv}")
1398
1399
@dbus.service.method(_interface, in_signature=u"o")
1400
def RemoveClient(self, object_path):
1401
"D-Bus method"
1402
for c in clients:
1403
if c.dbus_object_path == object_path:
1404
clients.remove(c)
1405
c.remove_from_connection()
1406
# Don't signal anything except ClientRemoved
1407
c.disable(signal=False)
1408
# Emit D-Bus signal
1409
self.ClientRemoved(object_path, c.name)
1410
return
1411
raise KeyError
1412
1413
del _interface
1414
1415
mandos_dbus_service = MandosDBusService()
1416
1417
787
for client in clients:
1418
if use_dbus:
1419
# Emit D-Bus signal
1420
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1421
client.GetAllProperties())
1422
client.enable()
1423
1424
tcp_server.enable()
1425
tcp_server.server_activate()
1426
788
client.start()
789
790
tcp_server = IPv6_TCPServer((server_settings["address"],
791
server_settings["port"]),
792
tcp_handler,
793
settings=server_settings,
794
clients=clients)
1427
795
# Find out what port we got
1428
796
service.port = tcp_server.socket.getsockname()[1]
1429
if use_ipv6:
1430
logger.info(u"Now listening on address %r, port %d,"
1431
" flowinfo %d, scope_id %d"
1432
% tcp_server.socket.getsockname())
1433
else: # IPv4
1434
logger.info(u"Now listening on address %r, port %d"
1435
% tcp_server.socket.getsockname())
797
logger.debug(u"Now listening on address %r, port %d, flowinfo %d,"
798
u" scope_id %d" % tcp_server.socket.getsockname())
1436
799
1437
800
#service.interface = tcp_server.socket.getsockname()[3]
1438
801
1439
802
try:
1440
803
# From the Avahi example code
1441
server.connect_to_signal(u"StateChanged", server_state_changed)
804
server.connect_to_signal("StateChanged", server_state_changed)
1442
805
try:
1443
806
server_state_changed(server.GetState())
1444
807
except dbus.exceptions.DBusException, error:
1448
811
1449
812
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1450
813
lambda *args, **kwargs:
1451
(tcp_server.handle_request
1452
(*args[2:], **kwargs) or True))
814
tcp_server.handle_request\
815
(*args[2:], **kwargs) or True)
1453
816
1454
logger.debug(u"Starting main loop")
817
logger.debug("Starting main loop")
818
main_loop_started = True
1455
819
main_loop.run()
1456
820
except AvahiError, error:
1457
logger.critical(u"AvahiError: %s", error)
821
logger.critical(u"AvahiError: %s" + unicode(error))
1458
822
sys.exit(1)
1459
823
except KeyboardInterrupt:
1460
824
if debug:
1461
print >> sys.stderr
1462
logger.debug(u"Server received KeyboardInterrupt")
1463
logger.debug(u"Server exiting")
825
print
1464
826
1465
827
if __name__ == '__main__':
1466
828
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0