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- Committer: Björn Påhlsson
- Date: 2008-07-21 03:58:36 UTC
- mfrom: (17 mandos)
- mto: This revision was merged to the branch mainline in revision 20.
- Revision ID: belorn@braxen-20080721035836-v7220bmolr608r61
Added getopt_long support for mandosclient and passprompt
Added support for --interface for mandosclient
Added support for --prefix for passprompt
Added support for --interface for mandosclient
Added support for --prefix for passprompt
- 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", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, 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
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# Copyright © 2008,2009 Björn Påhlsson
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# Everything else is Copyright © 2007-2008 Teddy Hogeborn and Björn
14
# Påhlsson.
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15
#
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16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
25
24
# GNU General Public License for more details.
26
25
#
27
26
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
33
34
from __future__ import division, with_statement, absolute_import
35
36
import SocketServer as socketserver
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
28
#
29
# Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
30
# <https://www.fukt.bsnet.se/~teddy/>.
31
#
32
33
from __future__ import division
34
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
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import errno
41
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import gnutls.crypto
44
44
import gnutls.library.functions
45
45
import gnutls.library.constants
46
46
import gnutls.library.types
47
import ConfigParser as configparser
47
import ConfigParser
48
48
import sys
49
49
import re
50
50
import os
51
51
import signal
52
from sets import Set
52
53
import subprocess
53
54
import atexit
54
55
import stat
55
56
import logging
56
57
import logging.handlers
57
import pwd
58
import contextlib
59
import struct
60
import fcntl
61
import functools
62
import cPickle as pickle
63
import multiprocessing
64
58
65
59
import dbus
66
import dbus.service
67
60
import gobject
68
61
import avahi
69
62
from dbus.mainloop.glib import DBusGMainLoop
70
63
import ctypes
71
import ctypes.util
72
import xml.dom.minidom
73
import inspect
74
75
try:
76
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
77
except AttributeError:
78
try:
79
from IN import SO_BINDTODEVICE
80
except ImportError:
81
SO_BINDTODEVICE = None
82
83
84
version = "1.0.14"
85
86
logger = logging.getLogger(u'mandos')
87
syslogger = (logging.handlers.SysLogHandler
88
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
89
address = "/dev/log"))
90
syslogger.setFormatter(logging.Formatter
91
(u'Mandos [%(process)d]: %(levelname)s:'
92
u' %(message)s'))
64
65
# Brief description of the operation of this program:
66
#
67
# This server announces itself as a Zeroconf service. Connecting
68
# clients use the TLS protocol, with the unusual quirk that this
69
# server program acts as a TLS "client" while the connecting clients
70
# acts as a TLS "server". The clients (acting as a TLS "server") must
71
# supply an OpenPGP certificate, and the fingerprint of this
72
# certificate is used by this server to look up (in a list read from a
73
# file at start time) which binary blob to give the client. No other
74
# authentication or authorization is done by this server.
75
76
77
logger = logging.Logger('mandos')
78
syslogger = logging.handlers.SysLogHandler\
79
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
80
syslogger.setFormatter(logging.Formatter\
81
('%(levelname)s: %(message)s'))
93
82
logger.addHandler(syslogger)
94
95
console = logging.StreamHandler()
96
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
97
u' %(levelname)s:'
98
u' %(message)s'))
99
logger.addHandler(console)
100
101
multiprocessing_manager = multiprocessing.Manager()
102
103
class AvahiError(Exception):
104
def __init__(self, value, *args, **kwargs):
105
self.value = value
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
109
110
class AvahiServiceError(AvahiError):
111
pass
112
113
class AvahiGroupError(AvahiError):
114
pass
115
116
117
class AvahiService(object):
118
"""An Avahi (Zeroconf) service.
119
120
Attributes:
121
interface: integer; avahi.IF_UNSPEC or an interface index.
122
Used to optionally bind to the specified interface.
123
name: string; Example: u'Mandos'
124
type: string; Example: u'_mandos._tcp'.
125
See <http://www.dns-sd.org/ServiceTypes.html>
126
port: integer; what port to announce
127
TXT: list of strings; TXT record for the service
128
domain: string; Domain to publish on, default to .local if empty.
129
host: string; Host to publish records for, default is localhost
130
max_renames: integer; maximum number of renames
131
rename_count: integer; counter so we only rename after collisions
132
a sensible number of times
133
group: D-Bus Entry Group
134
server: D-Bus Server
135
bus: dbus.SystemBus()
136
"""
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
138
servicetype = None, port = None, TXT = None,
139
domain = u"", host = u"", max_renames = 32768,
140
protocol = avahi.PROTO_UNSPEC, bus = None):
141
self.interface = interface
142
self.name = name
143
self.type = servicetype
144
self.port = port
145
self.TXT = TXT if TXT is not None else []
146
self.domain = domain
147
self.host = host
148
self.rename_count = 0
149
self.max_renames = max_renames
150
self.protocol = protocol
151
self.group = None # our entry group
152
self.server = None
153
self.bus = bus
154
def rename(self):
155
"""Derived from the Avahi example code"""
156
if self.rename_count >= self.max_renames:
157
logger.critical(u"No suitable Zeroconf service name found"
158
u" after %i retries, exiting.",
159
self.rename_count)
160
raise AvahiServiceError(u"Too many renames")
161
self.name = self.server.GetAlternativeServiceName(self.name)
162
logger.info(u"Changing Zeroconf service name to %r ...",
163
unicode(self.name))
164
syslogger.setFormatter(logging.Formatter
165
(u'Mandos (%s) [%%(process)d]:'
166
u' %%(levelname)s: %%(message)s'
167
% self.name))
168
self.remove()
169
self.add()
170
self.rename_count += 1
171
def remove(self):
172
"""Derived from the Avahi example code"""
173
if self.group is not None:
174
self.group.Reset()
175
def add(self):
176
"""Derived from the Avahi example code"""
177
if self.group is None:
178
self.group = dbus.Interface(
179
self.bus.get_object(avahi.DBUS_NAME,
180
self.server.EntryGroupNew()),
181
avahi.DBUS_INTERFACE_ENTRY_GROUP)
182
self.group.connect_to_signal('StateChanged',
183
self
184
.entry_group_state_changed)
185
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
186
self.name, self.type)
187
self.group.AddService(
188
self.interface,
189
self.protocol,
190
dbus.UInt32(0), # flags
191
self.name, self.type,
192
self.domain, self.host,
193
dbus.UInt16(self.port),
194
avahi.string_array_to_txt_array(self.TXT))
195
self.group.Commit()
196
def entry_group_state_changed(self, state, error):
197
"""Derived from the Avahi example code"""
198
logger.debug(u"Avahi state change: %i", state)
199
200
if state == avahi.ENTRY_GROUP_ESTABLISHED:
201
logger.debug(u"Zeroconf service established.")
202
elif state == avahi.ENTRY_GROUP_COLLISION:
203
logger.warning(u"Zeroconf service name collision.")
204
self.rename()
205
elif state == avahi.ENTRY_GROUP_FAILURE:
206
logger.critical(u"Avahi: Error in group state changed %s",
207
unicode(error))
208
raise AvahiGroupError(u"State changed: %s"
209
% unicode(error))
210
def cleanup(self):
211
"""Derived from the Avahi example code"""
212
if self.group is not None:
213
self.group.Free()
214
self.group = None
215
def server_state_changed(self, state):
216
"""Derived from the Avahi example code"""
217
if state == avahi.SERVER_COLLISION:
218
logger.error(u"Zeroconf server name collision")
219
self.remove()
220
elif state == avahi.SERVER_RUNNING:
221
self.add()
222
def activate(self):
223
"""Derived from the Avahi example code"""
224
if self.server is None:
225
self.server = dbus.Interface(
226
self.bus.get_object(avahi.DBUS_NAME,
227
avahi.DBUS_PATH_SERVER),
228
avahi.DBUS_INTERFACE_SERVER)
229
self.server.connect_to_signal(u"StateChanged",
230
self.server_state_changed)
231
self.server_state_changed(self.server.GetState())
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
89
# From the Avahi example code:
90
serviceName = "Mandos"
91
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
92
servicePort = None # Not known at startup
93
serviceTXT = [] # TXT record for the service
94
domain = "" # Domain to publish on, default to .local
95
host = "" # Host to publish records for, default to localhost
96
group = None #our entry group
97
rename_count = 12 # Counter so we only rename after collisions a
98
# sensible number of times
99
# End of Avahi example code
232
100
233
101
234
102
class Client(object):
235
103
"""A representation of a client host served by this server.
236
237
104
Attributes:
238
name: string; from the config file, used in log messages and
239
D-Bus identifiers
105
name: string; from the config file, used in log messages
240
106
fingerprint: string (40 or 32 hexadecimal digits); used to
241
107
uniquely identify the client
242
secret: bytestring; sent verbatim (over TLS) to client
243
host: string; available for use by the checker command
244
created: datetime.datetime(); (UTC) object creation
245
last_enabled: datetime.datetime(); (UTC)
246
enabled: bool()
247
last_checked_ok: datetime.datetime(); (UTC) or None
248
timeout: datetime.timedelta(); How long from last_checked_ok
249
until this client is disabled
250
interval: datetime.timedelta(); How often to start a new checker
251
disable_hook: If set, called by disable() as disable_hook(self)
252
checker: subprocess.Popen(); a running checker process used
253
to see if the client lives.
254
'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.
255
119
checker_initiator_tag: a gobject event source tag, or None
256
disable_initiator_tag: - '' -
120
stop_initiator_tag: - '' -
257
121
checker_callback_tag: - '' -
258
122
checker_command: string; External command which is run to check if
259
client lives. %() expansions are done at
123
client lives. %()s expansions are done at
260
124
runtime with vars(self) as dict, so that for
261
125
instance %(name)s can be used in the command.
262
current_checker_command: string; current running checker_command
263
approved_delay: datetime.timedelta(); Time to wait for approval
264
_approved: bool(); 'None' if not yet approved/disapproved
265
approved_duration: datetime.timedelta(); Duration of one approval
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: - '' -
266
131
"""
267
268
@staticmethod
269
def _timedelta_to_milliseconds(td):
270
"Convert a datetime.timedelta() to milliseconds"
271
return ((td.days * 24 * 60 * 60 * 1000)
272
+ (td.seconds * 1000)
273
+ (td.microseconds // 1000))
274
275
def timeout_milliseconds(self):
276
"Return the 'timeout' attribute in milliseconds"
277
return self._timedelta_to_milliseconds(self.timeout)
278
279
def interval_milliseconds(self):
280
"Return the 'interval' attribute in milliseconds"
281
return self._timedelta_to_milliseconds(self.interval)
282
283
def approved_delay_milliseconds(self):
284
return self._timedelta_to_milliseconds(self.approved_delay)
285
286
def __init__(self, name = None, disable_hook=None, config=None):
287
"""Note: the 'checker' key in 'config' sets the
288
'checker_command' attribute and *not* the 'checker'
289
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.."""
290
160
self.name = name
291
if config is None:
292
config = {}
293
logger.debug(u"Creating client %r", self.name)
294
# Uppercase and remove spaces from fingerprint for later
295
# comparison purposes with return value from the fingerprint()
296
# function
297
self.fingerprint = (config[u"fingerprint"].upper()
298
.replace(u" ", u""))
299
logger.debug(u" Fingerprint: %s", self.fingerprint)
300
if u"secret" in config:
301
self.secret = config[u"secret"].decode(u"base64")
302
elif u"secfile" in config:
303
with open(os.path.expanduser(os.path.expandvars
304
(config[u"secfile"])),
305
"rb") as secfile:
306
self.secret = secfile.read()
307
else:
308
#XXX Need to allow secret on demand!
309
raise TypeError(u"No secret or secfile for client %s"
310
% self.name)
311
self.host = config.get(u"host", u"")
312
self.created = datetime.datetime.utcnow()
313
self.enabled = False
314
self.last_enabled = None
315
self.last_checked_ok = None
316
self.timeout = string_to_delta(config[u"timeout"])
317
self.interval = string_to_delta(config[u"interval"])
318
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
319
186
self.checker = None
320
187
self.checker_initiator_tag = None
321
self.disable_initiator_tag = None
188
self.stop_initiator_tag = None
322
189
self.checker_callback_tag = None
323
self.checker_command = config[u"checker"]
324
self.current_checker_command = None
325
self.last_connect = None
326
self.approvals_pending = 0
327
self._approved = None
328
self.approved_by_default = config.get(u"approved_by_default",
329
True)
330
self.approved_delay = string_to_delta(
331
config[u"approved_delay"])
332
self.approved_duration = string_to_delta(
333
config[u"approved_duration"])
334
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
335
336
def send_changedstate(self):
337
self.changedstate.acquire()
338
self.changedstate.notify_all()
339
self.changedstate.release()
340
341
def enable(self):
190
self.check_command = checker
191
def start(self):
342
192
"""Start this client's checker and timeout hooks"""
343
if getattr(self, u"enabled", False):
344
# Already enabled
345
return
346
self.send_changedstate()
347
self.last_enabled = datetime.datetime.utcnow()
348
193
# Schedule a new checker to be started an 'interval' from now,
349
194
# and every interval from then on.
350
self.checker_initiator_tag = (gobject.timeout_add
351
(self.interval_milliseconds(),
352
self.start_checker))
353
# Schedule a disable() when 'timeout' has passed
354
self.disable_initiator_tag = (gobject.timeout_add
355
(self.timeout_milliseconds(),
356
self.disable))
357
self.enabled = True
195
self.checker_initiator_tag = gobject.timeout_add\
196
(self._interval_milliseconds,
197
self.start_checker)
358
198
# Also start a new checker *right now*.
359
199
self.start_checker()
360
361
def disable(self, quiet=True):
362
"""Disable this client."""
363
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:
364
213
return False
365
if not quiet:
366
self.send_changedstate()
367
if not quiet:
368
logger.info(u"Disabling client %s", self.name)
369
if getattr(self, u"disable_initiator_tag", False):
370
gobject.source_remove(self.disable_initiator_tag)
371
self.disable_initiator_tag = None
372
if getattr(self, u"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:
373
220
gobject.source_remove(self.checker_initiator_tag)
374
221
self.checker_initiator_tag = None
375
222
self.stop_checker()
376
if self.disable_hook:
377
self.disable_hook(self)
378
self.enabled = False
223
if self.stop_hook:
224
self.stop_hook(self)
379
225
# Do not run this again if called by a gobject.timeout_add
380
226
return False
381
382
227
def __del__(self):
383
self.disable_hook = None
384
self.disable()
385
386
def checker_callback(self, pid, condition, command):
228
self.stop_hook = None
229
self.stop()
230
def checker_callback(self, pid, condition):
387
231
"""The checker has completed, so take appropriate actions."""
232
now = datetime.datetime.now()
388
233
self.checker_callback_tag = None
389
234
self.checker = None
390
if os.WIFEXITED(condition):
391
exitstatus = os.WEXITSTATUS(condition)
392
if exitstatus == 0:
393
logger.info(u"Checker for %(name)s succeeded",
394
vars(self))
395
self.checked_ok()
396
else:
397
logger.info(u"Checker for %(name)s failed",
398
vars(self))
399
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):
400
245
logger.warning(u"Checker for %(name)s crashed?",
401
246
vars(self))
402
403
def checked_ok(self):
404
"""Bump up the timeout for this client.
405
406
This should only be called when the client has been seen,
407
alive and well.
408
"""
409
self.last_checked_ok = datetime.datetime.utcnow()
410
gobject.source_remove(self.disable_initiator_tag)
411
self.disable_initiator_tag = (gobject.timeout_add
412
(self.timeout_milliseconds(),
413
self.disable))
414
247
else:
248
logger.debug(u"Checker for %(name)s failed",
249
vars(self))
415
250
def start_checker(self):
416
251
"""Start a new checker subprocess if one is not running.
417
418
252
If a checker already exists, leave it running and do
419
253
nothing."""
420
254
# The reason for not killing a running checker is that if we
423
257
# client would inevitably timeout, since no checker would get
424
258
# a chance to run to completion. If we instead leave running
425
259
# checkers alone, the checker would have to take more time
426
# than 'timeout' for the client to be disabled, which is as it
427
# should be.
428
429
# If a checker exists, make sure it is not a zombie
430
try:
431
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
432
except (AttributeError, OSError), error:
433
if (isinstance(error, OSError)
434
and error.errno != errno.ECHILD):
435
raise error
436
else:
437
if pid:
438
logger.warning(u"Checker was a zombie")
439
gobject.source_remove(self.checker_callback_tag)
440
self.checker_callback(pid, status,
441
self.current_checker_command)
442
# Start a new checker if needed
260
# than 'timeout' for the client to be declared invalid, which
261
# is as it should be.
443
262
if self.checker is None:
444
263
try:
445
# In case checker_command has exactly one % operator
446
command = self.checker_command % self.host
264
command = self.check_command % self.fqdn
447
265
except TypeError:
448
# Escape attributes for the shell
449
escaped_attrs = dict((key,
450
re.escape(unicode(str(val),
451
errors=
452
u'replace')))
266
escaped_attrs = dict((key, re.escape(str(val)))
453
267
for key, val in
454
268
vars(self).iteritems())
455
269
try:
456
command = self.checker_command % escaped_attrs
270
command = self.check_command % escaped_attrs
457
271
except TypeError, error:
458
logger.error(u'Could not format string "%s":'
459
u' %s', self.checker_command, error)
272
logger.critical(u'Could not format string "%s":'
273
u' %s', self.check_command, error)
460
274
return True # Try again later
461
self.current_checker_command = command
462
275
try:
463
logger.info(u"Starting checker %r for %s",
464
command, self.name)
465
# We don't need to redirect stdout and stderr, since
466
# in normal mode, that is already done by daemon(),
467
# and in debug mode we don't want to. (Stdin is
468
# always replaced by /dev/null.)
469
self.checker = subprocess.Popen(command,
470
close_fds=True,
471
shell=True, cwd=u"/")
472
self.checker_callback_tag = (gobject.child_watch_add
473
(self.checker.pid,
474
self.checker_callback,
475
data=command))
476
# The checker may have completed before the gobject
477
# watch was added. Check for this.
478
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
479
if pid:
480
gobject.source_remove(self.checker_callback_tag)
481
self.checker_callback(pid, status, command)
482
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:
483
286
logger.error(u"Failed to start subprocess: %s",
484
287
error)
485
288
# Re-run this periodically if run by gobject.timeout_add
486
289
return True
487
488
290
def stop_checker(self):
489
291
"""Force the checker process, if any, to stop."""
490
292
if self.checker_callback_tag:
491
293
gobject.source_remove(self.checker_callback_tag)
492
294
self.checker_callback_tag = None
493
if getattr(self, u"checker", None) is None:
295
if not hasattr(self, "checker") or self.checker is None:
494
296
return
495
logger.debug(u"Stopping checker for %(name)s", vars(self))
297
logger.debug("Stopping checker for %(name)s", vars(self))
496
298
try:
497
299
os.kill(self.checker.pid, signal.SIGTERM)
498
#time.sleep(0.5)
300
#os.sleep(0.5)
499
301
#if self.checker.poll() is None:
500
302
# os.kill(self.checker.pid, signal.SIGKILL)
501
303
except OSError, error:
502
if error.errno != errno.ESRCH: # No such process
304
if error.errno != errno.ESRCH:
503
305
raise
504
306
self.checker = None
505
506
def dbus_service_property(dbus_interface, signature=u"v",
507
access=u"readwrite", byte_arrays=False):
508
"""Decorators for marking methods of a DBusObjectWithProperties to
509
become properties on the D-Bus.
510
511
The decorated method will be called with no arguments by "Get"
512
and with one argument by "Set".
513
514
The parameters, where they are supported, are the same as
515
dbus.service.method, except there is only "signature", since the
516
type from Get() and the type sent to Set() is the same.
517
"""
518
# Encoding deeply encoded byte arrays is not supported yet by the
519
# "Set" method, so we fail early here:
520
if byte_arrays and signature != u"ay":
521
raise ValueError(u"Byte arrays not supported for non-'ay'"
522
u" signature %r" % signature)
523
def decorator(func):
524
func._dbus_is_property = True
525
func._dbus_interface = dbus_interface
526
func._dbus_signature = signature
527
func._dbus_access = access
528
func._dbus_name = func.__name__
529
if func._dbus_name.endswith(u"_dbus_property"):
530
func._dbus_name = func._dbus_name[:-14]
531
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
532
return func
533
return decorator
534
535
536
class DBusPropertyException(dbus.exceptions.DBusException):
537
"""A base class for D-Bus property-related exceptions
538
"""
539
def __unicode__(self):
540
return unicode(str(self))
541
542
543
class DBusPropertyAccessException(DBusPropertyException):
544
"""A property's access permissions disallows an operation.
545
"""
546
pass
547
548
549
class DBusPropertyNotFound(DBusPropertyException):
550
"""An attempt was made to access a non-existing property.
551
"""
552
pass
553
554
555
class DBusObjectWithProperties(dbus.service.Object):
556
"""A D-Bus object with properties.
557
558
Classes inheriting from this can use the dbus_service_property
559
decorator to expose methods as D-Bus properties. It exposes the
560
standard Get(), Set(), and GetAll() methods on the D-Bus.
561
"""
562
563
@staticmethod
564
def _is_dbus_property(obj):
565
return getattr(obj, u"_dbus_is_property", False)
566
567
def _get_all_dbus_properties(self):
568
"""Returns a generator of (name, attribute) pairs
569
"""
570
return ((prop._dbus_name, prop)
571
for name, prop in
572
inspect.getmembers(self, self._is_dbus_property))
573
574
def _get_dbus_property(self, interface_name, property_name):
575
"""Returns a bound method if one exists which is a D-Bus
576
property with the specified name and interface.
577
"""
578
for name in (property_name,
579
property_name + u"_dbus_property"):
580
prop = getattr(self, name, None)
581
if (prop is None
582
or not self._is_dbus_property(prop)
583
or prop._dbus_name != property_name
584
or (interface_name and prop._dbus_interface
585
and interface_name != prop._dbus_interface)):
586
continue
587
return prop
588
# No such property
589
raise DBusPropertyNotFound(self.dbus_object_path + u":"
590
+ interface_name + u"."
591
+ property_name)
592
593
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
594
out_signature=u"v")
595
def Get(self, interface_name, property_name):
596
"""Standard D-Bus property Get() method, see D-Bus standard.
597
"""
598
prop = self._get_dbus_property(interface_name, property_name)
599
if prop._dbus_access == u"write":
600
raise DBusPropertyAccessException(property_name)
601
value = prop()
602
if not hasattr(value, u"variant_level"):
603
return value
604
return type(value)(value, variant_level=value.variant_level+1)
605
606
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
607
def Set(self, interface_name, property_name, value):
608
"""Standard D-Bus property Set() method, see D-Bus standard.
609
"""
610
prop = self._get_dbus_property(interface_name, property_name)
611
if prop._dbus_access == u"read":
612
raise DBusPropertyAccessException(property_name)
613
if prop._dbus_get_args_options[u"byte_arrays"]:
614
# The byte_arrays option is not supported yet on
615
# signatures other than "ay".
616
if prop._dbus_signature != u"ay":
617
raise ValueError
618
value = dbus.ByteArray(''.join(unichr(byte)
619
for byte in value))
620
prop(value)
621
622
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
623
out_signature=u"a{sv}")
624
def GetAll(self, interface_name):
625
"""Standard D-Bus property GetAll() method, see D-Bus
626
standard.
627
628
Note: Will not include properties with access="write".
629
"""
630
all = {}
631
for name, prop in self._get_all_dbus_properties():
632
if (interface_name
633
and interface_name != prop._dbus_interface):
634
# Interface non-empty but did not match
635
continue
636
# Ignore write-only properties
637
if prop._dbus_access == u"write":
638
continue
639
value = prop()
640
if not hasattr(value, u"variant_level"):
641
all[name] = value
642
continue
643
all[name] = type(value)(value, variant_level=
644
value.variant_level+1)
645
return dbus.Dictionary(all, signature=u"sv")
646
647
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
648
out_signature=u"s",
649
path_keyword='object_path',
650
connection_keyword='connection')
651
def Introspect(self, object_path, connection):
652
"""Standard D-Bus method, overloaded to insert property tags.
653
"""
654
xmlstring = dbus.service.Object.Introspect(self, object_path,
655
connection)
656
try:
657
document = xml.dom.minidom.parseString(xmlstring)
658
def make_tag(document, name, prop):
659
e = document.createElement(u"property")
660
e.setAttribute(u"name", name)
661
e.setAttribute(u"type", prop._dbus_signature)
662
e.setAttribute(u"access", prop._dbus_access)
663
return e
664
for if_tag in document.getElementsByTagName(u"interface"):
665
for tag in (make_tag(document, name, prop)
666
for name, prop
667
in self._get_all_dbus_properties()
668
if prop._dbus_interface
669
== if_tag.getAttribute(u"name")):
670
if_tag.appendChild(tag)
671
# Add the names to the return values for the
672
# "org.freedesktop.DBus.Properties" methods
673
if (if_tag.getAttribute(u"name")
674
== u"org.freedesktop.DBus.Properties"):
675
for cn in if_tag.getElementsByTagName(u"method"):
676
if cn.getAttribute(u"name") == u"Get":
677
for arg in cn.getElementsByTagName(u"arg"):
678
if (arg.getAttribute(u"direction")
679
== u"out"):
680
arg.setAttribute(u"name", u"value")
681
elif cn.getAttribute(u"name") == u"GetAll":
682
for arg in cn.getElementsByTagName(u"arg"):
683
if (arg.getAttribute(u"direction")
684
== u"out"):
685
arg.setAttribute(u"name", u"props")
686
xmlstring = document.toxml(u"utf-8")
687
document.unlink()
688
except (AttributeError, xml.dom.DOMException,
689
xml.parsers.expat.ExpatError), error:
690
logger.error(u"Failed to override Introspection method",
691
error)
692
return xmlstring
693
694
695
class ClientDBus(Client, DBusObjectWithProperties):
696
"""A Client class using D-Bus
697
698
Attributes:
699
dbus_object_path: dbus.ObjectPath
700
bus: dbus.SystemBus()
701
"""
702
# dbus.service.Object doesn't use super(), so we can't either.
703
704
def __init__(self, bus = None, *args, **kwargs):
705
self._approvals_pending = 0
706
self.bus = bus
707
Client.__init__(self, *args, **kwargs)
708
# Only now, when this client is initialized, can it show up on
709
# the D-Bus
710
self.dbus_object_path = (dbus.ObjectPath
711
(u"/clients/"
712
+ self.name.replace(u".", u"_")))
713
DBusObjectWithProperties.__init__(self, self.bus,
714
self.dbus_object_path)
715
716
def _get_approvals_pending(value):
717
return self._approvals_pending
718
def _set_approvals_pending(value):
719
old_value = self._approvals_pending
720
self._approvals_pending = value
721
bval = bool(value)
722
if bval is bool(old_value):
723
dbus_bool = dbus.Boolean(bval, variant_level=1)
724
self.PropertyChanged(dbus.String(u"approved_pending"),
725
dbus_bool)
726
return value
727
approvals_pending = property(_get_approvals_pending,
728
_set_approvals_pending)
729
del _get_approvals_pending, _set_approvals_pending
730
731
@staticmethod
732
def _datetime_to_dbus(dt, variant_level=0):
733
"""Convert a UTC datetime.datetime() to a D-Bus type."""
734
return dbus.String(dt.isoformat(),
735
variant_level=variant_level)
736
737
def enable(self):
738
oldstate = getattr(self, u"enabled", False)
739
r = Client.enable(self)
740
if oldstate != self.enabled:
741
# Emit D-Bus signals
742
self.PropertyChanged(dbus.String(u"enabled"),
743
dbus.Boolean(True, variant_level=1))
744
self.PropertyChanged(
745
dbus.String(u"last_enabled"),
746
self._datetime_to_dbus(self.last_enabled,
747
variant_level=1))
748
return r
749
750
def disable(self, quiet = False):
751
oldstate = getattr(self, u"enabled", False)
752
r = Client.disable(self, quiet=quiet)
753
if not quiet and oldstate != self.enabled:
754
# Emit D-Bus signal
755
self.PropertyChanged(dbus.String(u"enabled"),
756
dbus.Boolean(False, variant_level=1))
757
return r
758
759
def __del__(self, *args, **kwargs):
760
try:
761
self.remove_from_connection()
762
except LookupError:
763
pass
764
if hasattr(DBusObjectWithProperties, u"__del__"):
765
DBusObjectWithProperties.__del__(self, *args, **kwargs)
766
Client.__del__(self, *args, **kwargs)
767
768
def checker_callback(self, pid, condition, command,
769
*args, **kwargs):
770
self.checker_callback_tag = None
771
self.checker = None
772
# Emit D-Bus signal
773
self.PropertyChanged(dbus.String(u"checker_running"),
774
dbus.Boolean(False, variant_level=1))
775
if os.WIFEXITED(condition):
776
exitstatus = os.WEXITSTATUS(condition)
777
# Emit D-Bus signal
778
self.CheckerCompleted(dbus.Int16(exitstatus),
779
dbus.Int64(condition),
780
dbus.String(command))
781
else:
782
# Emit D-Bus signal
783
self.CheckerCompleted(dbus.Int16(-1),
784
dbus.Int64(condition),
785
dbus.String(command))
786
787
return Client.checker_callback(self, pid, condition, command,
788
*args, **kwargs)
789
790
def checked_ok(self, *args, **kwargs):
791
r = Client.checked_ok(self, *args, **kwargs)
792
# Emit D-Bus signal
793
self.PropertyChanged(
794
dbus.String(u"last_checked_ok"),
795
(self._datetime_to_dbus(self.last_checked_ok,
796
variant_level=1)))
797
return r
798
799
def start_checker(self, *args, **kwargs):
800
old_checker = self.checker
801
if self.checker is not None:
802
old_checker_pid = self.checker.pid
803
else:
804
old_checker_pid = None
805
r = Client.start_checker(self, *args, **kwargs)
806
# Only if new checker process was started
807
if (self.checker is not None
808
and old_checker_pid != self.checker.pid):
809
# Emit D-Bus signal
810
self.CheckerStarted(self.current_checker_command)
811
self.PropertyChanged(
812
dbus.String(u"checker_running"),
813
dbus.Boolean(True, variant_level=1))
814
return r
815
816
def stop_checker(self, *args, **kwargs):
817
old_checker = getattr(self, u"checker", None)
818
r = Client.stop_checker(self, *args, **kwargs)
819
if (old_checker is not None
820
and getattr(self, u"checker", None) is None):
821
self.PropertyChanged(dbus.String(u"checker_running"),
822
dbus.Boolean(False, variant_level=1))
823
return r
824
825
def _reset_approved(self):
826
self._approved = None
827
return False
828
829
def approve(self, value=True):
830
self._approved = value
831
gobject.timeout_add(self._timedelta_to_milliseconds(self.approved_duration, self._reset_approved))
832
833
834
## D-Bus methods, signals & properties
835
_interface = u"se.bsnet.fukt.Mandos.Client"
836
837
## Signals
838
839
# CheckerCompleted - signal
840
@dbus.service.signal(_interface, signature=u"nxs")
841
def CheckerCompleted(self, exitcode, waitstatus, command):
842
"D-Bus signal"
843
pass
844
845
# CheckerStarted - signal
846
@dbus.service.signal(_interface, signature=u"s")
847
def CheckerStarted(self, command):
848
"D-Bus signal"
849
pass
850
851
# PropertyChanged - signal
852
@dbus.service.signal(_interface, signature=u"sv")
853
def PropertyChanged(self, property, value):
854
"D-Bus signal"
855
pass
856
857
# GotSecret - signal
858
@dbus.service.signal(_interface)
859
def GotSecret(self):
860
"D-Bus signal"
861
pass
862
863
# Rejected - signal
864
@dbus.service.signal(_interface, signature=u"s")
865
def Rejected(self, reason):
866
"D-Bus signal"
867
pass
868
869
# NeedApproval - signal
870
@dbus.service.signal(_interface, signature=u"db")
871
def NeedApproval(self, timeout, default):
872
"D-Bus signal"
873
pass
874
875
## Methods
876
877
# Approve - method
878
@dbus.service.method(_interface, in_signature=u"b")
879
def Approve(self, value):
880
self.approve(value)
881
882
# CheckedOK - method
883
@dbus.service.method(_interface)
884
def CheckedOK(self):
885
return self.checked_ok()
886
887
# Enable - method
888
@dbus.service.method(_interface)
889
def Enable(self):
890
"D-Bus method"
891
self.enable()
892
893
# StartChecker - method
894
@dbus.service.method(_interface)
895
def StartChecker(self):
896
"D-Bus method"
897
self.start_checker()
898
899
# Disable - method
900
@dbus.service.method(_interface)
901
def Disable(self):
902
"D-Bus method"
903
self.disable()
904
905
# StopChecker - method
906
@dbus.service.method(_interface)
907
def StopChecker(self):
908
self.stop_checker()
909
910
## Properties
911
912
# approved_pending - property
913
@dbus_service_property(_interface, signature=u"b", access=u"read")
914
def approved_pending_dbus_property(self):
915
return dbus.Boolean(bool(self.approvals_pending))
916
917
# approved_by_default - property
918
@dbus_service_property(_interface, signature=u"b",
919
access=u"readwrite")
920
def approved_by_default_dbus_property(self):
921
return dbus.Boolean(self.approved_by_default)
922
923
# approved_delay - property
924
@dbus_service_property(_interface, signature=u"t",
925
access=u"readwrite")
926
def approved_delay_dbus_property(self):
927
return dbus.UInt64(self.approved_delay_milliseconds())
928
929
# approved_duration - property
930
@dbus_service_property(_interface, signature=u"t",
931
access=u"readwrite")
932
def approved_duration_dbus_property(self):
933
return dbus.UInt64(self._timedelta_to_milliseconds(
934
self.approved_duration))
935
936
# name - property
937
@dbus_service_property(_interface, signature=u"s", access=u"read")
938
def name_dbus_property(self):
939
return dbus.String(self.name)
940
941
# fingerprint - property
942
@dbus_service_property(_interface, signature=u"s", access=u"read")
943
def fingerprint_dbus_property(self):
944
return dbus.String(self.fingerprint)
945
946
# host - property
947
@dbus_service_property(_interface, signature=u"s",
948
access=u"readwrite")
949
def host_dbus_property(self, value=None):
950
if value is None: # get
951
return dbus.String(self.host)
952
self.host = value
953
# Emit D-Bus signal
954
self.PropertyChanged(dbus.String(u"host"),
955
dbus.String(value, variant_level=1))
956
957
# created - property
958
@dbus_service_property(_interface, signature=u"s", access=u"read")
959
def created_dbus_property(self):
960
return dbus.String(self._datetime_to_dbus(self.created))
961
962
# last_enabled - property
963
@dbus_service_property(_interface, signature=u"s", access=u"read")
964
def last_enabled_dbus_property(self):
965
if self.last_enabled is None:
966
return dbus.String(u"")
967
return dbus.String(self._datetime_to_dbus(self.last_enabled))
968
969
# enabled - property
970
@dbus_service_property(_interface, signature=u"b",
971
access=u"readwrite")
972
def enabled_dbus_property(self, value=None):
973
if value is None: # get
974
return dbus.Boolean(self.enabled)
975
if value:
976
self.enable()
977
else:
978
self.disable()
979
980
# last_checked_ok - property
981
@dbus_service_property(_interface, signature=u"s",
982
access=u"readwrite")
983
def last_checked_ok_dbus_property(self, value=None):
984
if value is not None:
985
self.checked_ok()
986
return
987
if self.last_checked_ok is None:
988
return dbus.String(u"")
989
return dbus.String(self._datetime_to_dbus(self
990
.last_checked_ok))
991
992
# timeout - property
993
@dbus_service_property(_interface, signature=u"t",
994
access=u"readwrite")
995
def timeout_dbus_property(self, value=None):
996
if value is None: # get
997
return dbus.UInt64(self.timeout_milliseconds())
998
self.timeout = datetime.timedelta(0, 0, 0, value)
999
# Emit D-Bus signal
1000
self.PropertyChanged(dbus.String(u"timeout"),
1001
dbus.UInt64(value, variant_level=1))
1002
if getattr(self, u"disable_initiator_tag", None) is None:
1003
return
1004
# Reschedule timeout
1005
gobject.source_remove(self.disable_initiator_tag)
1006
self.disable_initiator_tag = None
1007
time_to_die = (self.
1008
_timedelta_to_milliseconds((self
1009
.last_checked_ok
1010
+ self.timeout)
1011
- datetime.datetime
1012
.utcnow()))
1013
if time_to_die <= 0:
1014
# The timeout has passed
1015
self.disable()
1016
else:
1017
self.disable_initiator_tag = (gobject.timeout_add
1018
(time_to_die, self.disable))
1019
1020
# interval - property
1021
@dbus_service_property(_interface, signature=u"t",
1022
access=u"readwrite")
1023
def interval_dbus_property(self, value=None):
1024
if value is None: # get
1025
return dbus.UInt64(self.interval_milliseconds())
1026
self.interval = datetime.timedelta(0, 0, 0, value)
1027
# Emit D-Bus signal
1028
self.PropertyChanged(dbus.String(u"interval"),
1029
dbus.UInt64(value, variant_level=1))
1030
if getattr(self, u"checker_initiator_tag", None) is None:
1031
return
1032
# Reschedule checker run
1033
gobject.source_remove(self.checker_initiator_tag)
1034
self.checker_initiator_tag = (gobject.timeout_add
1035
(value, self.start_checker))
1036
self.start_checker() # Start one now, too
1037
1038
# checker - property
1039
@dbus_service_property(_interface, signature=u"s",
1040
access=u"readwrite")
1041
def checker_dbus_property(self, value=None):
1042
if value is None: # get
1043
return dbus.String(self.checker_command)
1044
self.checker_command = value
1045
# Emit D-Bus signal
1046
self.PropertyChanged(dbus.String(u"checker"),
1047
dbus.String(self.checker_command,
1048
variant_level=1))
1049
1050
# checker_running - property
1051
@dbus_service_property(_interface, signature=u"b",
1052
access=u"readwrite")
1053
def checker_running_dbus_property(self, value=None):
1054
if value is None: # get
1055
return dbus.Boolean(self.checker is not None)
1056
if value:
1057
self.start_checker()
1058
else:
1059
self.stop_checker()
1060
1061
# object_path - property
1062
@dbus_service_property(_interface, signature=u"o", access=u"read")
1063
def object_path_dbus_property(self):
1064
return self.dbus_object_path # is already a dbus.ObjectPath
1065
1066
# secret = property
1067
@dbus_service_property(_interface, signature=u"ay",
1068
access=u"write", byte_arrays=True)
1069
def secret_dbus_property(self, value):
1070
self.secret = str(value)
1071
1072
del _interface
1073
1074
1075
class ProxyClient(object):
1076
def __init__(self, child_pipe, fpr, address):
1077
self._pipe = child_pipe
1078
self._pipe.send(('init', fpr, address))
1079
if not self._pipe.recv():
1080
raise KeyError()
1081
1082
def __getattribute__(self, name):
1083
if(name == '_pipe'):
1084
return super(ProxyClient, self).__getattribute__(name)
1085
self._pipe.send(('getattr', name))
1086
data = self._pipe.recv()
1087
if data[0] == 'data':
1088
return data[1]
1089
if data[0] == 'function':
1090
def func(*args, **kwargs):
1091
self._pipe.send(('funcall', name, args, kwargs))
1092
return self._pipe.recv()[1]
1093
return func
1094
1095
def __setattr__(self, name, value):
1096
if(name == '_pipe'):
1097
return super(ProxyClient, self).__setattr__(name, value)
1098
self._pipe.send(('setattr', name, value))
1099
1100
1101
class ClientHandler(socketserver.BaseRequestHandler, object):
1102
"""A class to handle client connections.
1103
1104
Instantiated once for each connection to handle it.
307
def still_valid(self, now=None):
308
"""Has the timeout not yet passed for this client?"""
309
if now is None:
310
now = datetime.datetime.now()
311
if self.last_seen is None:
312
return now < (self.created + self.timeout)
313
else:
314
return now < (self.last_seen + self.timeout)
315
316
317
def peer_certificate(session):
318
"Return the peer's OpenPGP certificate as a bytestring"
319
# If not an OpenPGP certificate...
320
if gnutls.library.functions.gnutls_certificate_type_get\
321
(session._c_object) \
322
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
323
# ...do the normal thing
324
return session.peer_certificate
325
list_size = ctypes.c_uint()
326
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
327
(session._c_object, ctypes.byref(list_size))
328
if list_size.value == 0:
329
return None
330
cert = cert_list[0]
331
return ctypes.string_at(cert.data, cert.size)
332
333
334
def fingerprint(openpgp):
335
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
336
# New empty GnuTLS certificate
337
crt = gnutls.library.types.gnutls_openpgp_crt_t()
338
gnutls.library.functions.gnutls_openpgp_crt_init\
339
(ctypes.byref(crt))
340
# 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)))
345
# Import the OpenPGP public key into the certificate
346
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
347
(crt,
348
ctypes.byref(datum),
349
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
350
# New buffer for the fingerprint
351
buffer = ctypes.create_string_buffer(20)
352
buffer_length = ctypes.c_size_t()
353
# Get the fingerprint from the certificate into the buffer
354
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
355
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
356
# Deinit the certificate
357
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
358
# Convert the buffer to a Python bytestring
359
fpr = ctypes.string_at(buffer, buffer_length.value)
360
# Convert the bytestring to hexadecimal notation
361
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
362
return hex_fpr
363
364
365
class tcp_handler(SocketServer.BaseRequestHandler, object):
366
"""A TCP request handler class.
367
Instantiated by IPv6_TCPServer for each request to handle it.
1105
368
Note: This will run in its own forked process."""
1106
369
1107
370
def handle(self):
1108
with contextlib.closing(self.server.child_pipe) as child_pipe:
1109
logger.info(u"TCP connection from: %s",
1110
unicode(self.client_address))
1111
logger.debug(u"Pipe FD: %d",
1112
self.server.child_pipe.fileno())
1113
1114
session = (gnutls.connection
1115
.ClientSession(self.request,
1116
gnutls.connection
1117
.X509Credentials()))
1118
1119
# Note: gnutls.connection.X509Credentials is really a
1120
# generic GnuTLS certificate credentials object so long as
1121
# no X.509 keys are added to it. Therefore, we can use it
1122
# here despite using OpenPGP certificates.
1123
1124
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1125
# u"+AES-256-CBC", u"+SHA1",
1126
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1127
# u"+DHE-DSS"))
1128
# Use a fallback default, since this MUST be set.
1129
priority = self.server.gnutls_priority
1130
if priority is None:
1131
priority = u"NORMAL"
1132
(gnutls.library.functions
1133
.gnutls_priority_set_direct(session._c_object,
1134
priority, None))
1135
1136
# Start communication using the Mandos protocol
1137
# Get protocol number
1138
line = self.request.makefile().readline()
1139
logger.debug(u"Protocol version: %r", line)
1140
try:
1141
if int(line.strip().split()[0]) > 1:
1142
raise RuntimeError
1143
except (ValueError, IndexError, RuntimeError), error:
1144
logger.error(u"Unknown protocol version: %s", error)
1145
return
1146
1147
# Start GnuTLS connection
1148
try:
1149
session.handshake()
1150
except gnutls.errors.GNUTLSError, error:
1151
logger.warning(u"Handshake failed: %s", error)
1152
# Do not run session.bye() here: the session is not
1153
# established. Just abandon the request.
1154
return
1155
logger.debug(u"Handshake succeeded")
1156
1157
approval_required = False
1158
try:
1159
try:
1160
fpr = self.fingerprint(self.peer_certificate
1161
(session))
1162
except (TypeError, gnutls.errors.GNUTLSError), error:
1163
logger.warning(u"Bad certificate: %s", error)
1164
return
1165
logger.debug(u"Fingerprint: %s", fpr)
1166
1167
try:
1168
client = ProxyClient(child_pipe, fpr,
1169
self.client_address)
1170
except KeyError:
1171
return
1172
1173
if client.approved_delay:
1174
delay = client.approved_delay
1175
client.approvals_pending += 1
1176
approval_required = True
1177
1178
while True:
1179
if not client.enabled:
1180
logger.warning(u"Client %s is disabled",
1181
client.name)
1182
if self.server.use_dbus:
1183
# Emit D-Bus signal
1184
client.Rejected("Disabled")
1185
return
1186
1187
if client._approved or not client.approved_delay:
1188
#We are approved or approval is disabled
1189
break
1190
elif client._approved is None:
1191
logger.info(u"Client %s need approval",
1192
client.name)
1193
if self.server.use_dbus:
1194
# Emit D-Bus signal
1195
client.NeedApproval(
1196
client.approved_delay_milliseconds(),
1197
client.approved_by_default)
1198
else:
1199
logger.warning(u"Client %s was not approved",
1200
client.name)
1201
if self.server.use_dbus:
1202
# Emit D-Bus signal
1203
client.Rejected("Disapproved")
1204
return
1205
1206
#wait until timeout or approved
1207
#x = float(client._timedelta_to_milliseconds(delay))
1208
time = datetime.datetime.now()
1209
client.changedstate.acquire()
1210
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1211
client.changedstate.release()
1212
time2 = datetime.datetime.now()
1213
if (time2 - time) >= delay:
1214
if not client.approved_by_default:
1215
logger.warning("Client %s timed out while"
1216
" waiting for approval",
1217
client.name)
1218
if self.server.use_dbus:
1219
# Emit D-Bus signal
1220
client.Rejected("Time out")
1221
return
1222
else:
1223
break
1224
else:
1225
delay -= time2 - time
1226
1227
sent_size = 0
1228
while sent_size < len(client.secret):
1229
# XXX handle session exception
1230
sent = session.send(client.secret[sent_size:])
1231
logger.debug(u"Sent: %d, remaining: %d",
1232
sent, len(client.secret)
1233
- (sent_size + sent))
1234
sent_size += sent
1235
1236
logger.info(u"Sending secret to %s", client.name)
1237
# bump the timeout as if seen
1238
client.checked_ok()
1239
if self.server.use_dbus:
1240
# Emit D-Bus signal
1241
client.GotSecret()
1242
1243
finally:
1244
if approval_required:
1245
client.approvals_pending -= 1
1246
session.bye()
1247
1248
@staticmethod
1249
def peer_certificate(session):
1250
"Return the peer's OpenPGP certificate as a bytestring"
1251
# If not an OpenPGP certificate...
1252
if (gnutls.library.functions
1253
.gnutls_certificate_type_get(session._c_object)
1254
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1255
# ...do the normal thing
1256
return session.peer_certificate
1257
list_size = ctypes.c_uint(1)
1258
cert_list = (gnutls.library.functions
1259
.gnutls_certificate_get_peers
1260
(session._c_object, ctypes.byref(list_size)))
1261
if not bool(cert_list) and list_size.value != 0:
1262
raise gnutls.errors.GNUTLSError(u"error getting peer"
1263
u" certificate")
1264
if list_size.value == 0:
1265
return None
1266
cert = cert_list[0]
1267
return ctypes.string_at(cert.data, cert.size)
1268
1269
@staticmethod
1270
def fingerprint(openpgp):
1271
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1272
# New GnuTLS "datum" with the OpenPGP public key
1273
datum = (gnutls.library.types
1274
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1275
ctypes.POINTER
1276
(ctypes.c_ubyte)),
1277
ctypes.c_uint(len(openpgp))))
1278
# New empty GnuTLS certificate
1279
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1280
(gnutls.library.functions
1281
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1282
# Import the OpenPGP public key into the certificate
1283
(gnutls.library.functions
1284
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1285
gnutls.library.constants
1286
.GNUTLS_OPENPGP_FMT_RAW))
1287
# Verify the self signature in the key
1288
crtverify = ctypes.c_uint()
1289
(gnutls.library.functions
1290
.gnutls_openpgp_crt_verify_self(crt, 0,
1291
ctypes.byref(crtverify)))
1292
if crtverify.value != 0:
1293
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1294
raise (gnutls.errors.CertificateSecurityError
1295
(u"Verify failed"))
1296
# New buffer for the fingerprint
1297
buf = ctypes.create_string_buffer(20)
1298
buf_len = ctypes.c_size_t()
1299
# Get the fingerprint from the certificate into the buffer
1300
(gnutls.library.functions
1301
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1302
ctypes.byref(buf_len)))
1303
# Deinit the certificate
1304
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1305
# Convert the buffer to a Python bytestring
1306
fpr = ctypes.string_at(buf, buf_len.value)
1307
# Convert the bytestring to hexadecimal notation
1308
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1309
return hex_fpr
1310
1311
1312
class MultiprocessingMixIn(object):
1313
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1314
def sub_process_main(self, request, address):
1315
try:
1316
self.finish_request(request, address)
1317
except:
1318
self.handle_error(request, address)
1319
self.close_request(request)
1320
1321
def process_request(self, request, address):
1322
"""Start a new process to process the request."""
1323
multiprocessing.Process(target = self.sub_process_main,
1324
args = (request, address)).start()
1325
1326
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1327
""" adds a pipe to the MixIn """
1328
def process_request(self, request, client_address):
1329
"""Overrides and wraps the original process_request().
1330
1331
This function creates a new pipe in self.pipe
1332
"""
1333
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1334
1335
super(MultiprocessingMixInWithPipe,
1336
self).process_request(request, client_address)
1337
self.add_pipe(parent_pipe)
1338
def add_pipe(self, parent_pipe):
1339
"""Dummy function; override as necessary"""
1340
pass
1341
1342
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1343
socketserver.TCPServer, object):
1344
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1345
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))
411
else:
412
logger.debug(u"Client not found for fingerprint: %s",
413
fpr)
414
session.bye()
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.
1346
428
Attributes:
1347
enabled: Boolean; whether this server is activated yet
1348
interface: None or a network interface name (string)
1349
use_ipv6: Boolean; to use IPv6 or not
429
options: Command line options
430
clients: Set() of Client objects
1350
431
"""
1351
def __init__(self, server_address, RequestHandlerClass,
1352
interface=None, use_ipv6=True):
1353
self.interface = interface
1354
if use_ipv6:
1355
self.address_family = socket.AF_INET6
1356
socketserver.TCPServer.__init__(self, server_address,
1357
RequestHandlerClass)
432
address_family = socket.AF_INET6
433
def __init__(self, *args, **kwargs):
434
if "options" in kwargs:
435
self.options = kwargs["options"]
436
del kwargs["options"]
437
if "clients" in kwargs:
438
self.clients = kwargs["clients"]
439
del kwargs["clients"]
440
return super(type(self), self).__init__(*args, **kwargs)
1358
441
def server_bind(self):
1359
442
"""This overrides the normal server_bind() function
1360
443
to bind to an interface if one was specified, and also NOT to
1361
444
bind to an address or port if they were not specified."""
1362
if self.interface is not None:
1363
if SO_BINDTODEVICE is None:
1364
logger.error(u"SO_BINDTODEVICE does not exist;"
1365
u" cannot bind to interface %s",
1366
self.interface)
1367
else:
1368
try:
1369
self.socket.setsockopt(socket.SOL_SOCKET,
1370
SO_BINDTODEVICE,
1371
str(self.interface
1372
+ u'\0'))
1373
except socket.error, error:
1374
if error[0] == errno.EPERM:
1375
logger.error(u"No permission to"
1376
u" bind to interface %s",
1377
self.interface)
1378
elif error[0] == errno.ENOPROTOOPT:
1379
logger.error(u"SO_BINDTODEVICE not available;"
1380
u" cannot bind to interface %s",
1381
self.interface)
1382
else:
1383
raise
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
449
try:
450
self.socket.setsockopt(socket.SOL_SOCKET,
451
socket.SO_BINDTODEVICE,
452
self.options.interface)
453
except socket.error, error:
454
if error[0] == errno.EPERM:
455
logger.warning(u"No permission to"
456
u" bind to interface %s",
457
self.options.interface)
458
else:
459
raise error
1384
460
# Only bind(2) the socket if we really need to.
1385
461
if self.server_address[0] or self.server_address[1]:
1386
462
if not self.server_address[0]:
1387
if self.address_family == socket.AF_INET6:
1388
any_address = u"::" # in6addr_any
1389
else:
1390
any_address = socket.INADDR_ANY
1391
self.server_address = (any_address,
463
in6addr_any = "::"
464
self.server_address = (in6addr_any,
1392
465
self.server_address[1])
1393
elif not self.server_address[1]:
466
elif self.server_address[1] is None:
1394
467
self.server_address = (self.server_address[0],
1395
468
0)
1396
# if self.interface:
1397
# self.server_address = (self.server_address[0],
1398
# 0, # port
1399
# 0, # flowinfo
1400
# if_nametoindex
1401
# (self.interface))
1402
return socketserver.TCPServer.server_bind(self)
1403
1404
1405
class MandosServer(IPv6_TCPServer):
1406
"""Mandos server.
1407
1408
Attributes:
1409
clients: set of Client objects
1410
gnutls_priority GnuTLS priority string
1411
use_dbus: Boolean; to emit D-Bus signals or not
1412
1413
Assumes a gobject.MainLoop event loop.
1414
"""
1415
def __init__(self, server_address, RequestHandlerClass,
1416
interface=None, use_ipv6=True, clients=None,
1417
gnutls_priority=None, use_dbus=True):
1418
self.enabled = False
1419
self.clients = clients
1420
if self.clients is None:
1421
self.clients = set()
1422
self.use_dbus = use_dbus
1423
self.gnutls_priority = gnutls_priority
1424
IPv6_TCPServer.__init__(self, server_address,
1425
RequestHandlerClass,
1426
interface = interface,
1427
use_ipv6 = use_ipv6)
1428
def server_activate(self):
1429
if self.enabled:
1430
return socketserver.TCPServer.server_activate(self)
1431
def enable(self):
1432
self.enabled = True
1433
def add_pipe(self, parent_pipe):
1434
# Call "handle_ipc" for both data and EOF events
1435
gobject.io_add_watch(parent_pipe.fileno(),
1436
gobject.IO_IN | gobject.IO_HUP,
1437
functools.partial(self.handle_ipc,
1438
parent_pipe = parent_pipe))
1439
1440
def handle_ipc(self, source, condition, parent_pipe=None,
1441
client_object=None):
1442
condition_names = {
1443
gobject.IO_IN: u"IN", # There is data to read.
1444
gobject.IO_OUT: u"OUT", # Data can be written (without
1445
# blocking).
1446
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1447
gobject.IO_ERR: u"ERR", # Error condition.
1448
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1449
# broken, usually for pipes and
1450
# sockets).
1451
}
1452
conditions_string = ' | '.join(name
1453
for cond, name in
1454
condition_names.iteritems()
1455
if cond & condition)
1456
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1457
conditions_string)
1458
1459
# Read a request from the child
1460
request = parent_pipe.recv()
1461
command = request[0]
1462
1463
if command == 'init':
1464
fpr = request[1]
1465
address = request[2]
1466
1467
for c in self.clients:
1468
if c.fingerprint == fpr:
1469
client = c
1470
break
1471
else:
1472
logger.warning(u"Client not found for fingerprint: %s, ad"
1473
u"dress: %s", fpr, address)
1474
if self.use_dbus:
1475
# Emit D-Bus signal
1476
mandos_dbus_service.ClientNotFound(fpr, address)
1477
parent_pipe.send(False)
1478
return False
1479
1480
gobject.io_add_watch(parent_pipe.fileno(),
1481
gobject.IO_IN | gobject.IO_HUP,
1482
functools.partial(self.handle_ipc,
1483
parent_pipe = parent_pipe,
1484
client_object = client))
1485
parent_pipe.send(True)
1486
# remove the old hook in favor of the new above hook on same fileno
1487
return False
1488
if command == 'funcall':
1489
funcname = request[1]
1490
args = request[2]
1491
kwargs = request[3]
1492
1493
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1494
1495
if command == 'getattr':
1496
attrname = request[1]
1497
if callable(client_object.__getattribute__(attrname)):
1498
parent_pipe.send(('function',))
1499
else:
1500
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1501
1502
if command == 'setattr':
1503
attrname = request[1]
1504
value = request[2]
1505
setattr(client_object, attrname, value)
1506
1507
return True
469
return super(type(self), self).server_bind()
1508
470
1509
471
1510
472
def string_to_delta(interval):
1511
473
"""Parse a string and return a datetime.timedelta
1512
1513
>>> string_to_delta(u'7d')
474
475
>>> string_to_delta('7d')
1514
476
datetime.timedelta(7)
1515
>>> string_to_delta(u'60s')
477
>>> string_to_delta('60s')
1516
478
datetime.timedelta(0, 60)
1517
>>> string_to_delta(u'60m')
479
>>> string_to_delta('60m')
1518
480
datetime.timedelta(0, 3600)
1519
>>> string_to_delta(u'24h')
481
>>> string_to_delta('24h')
1520
482
datetime.timedelta(1)
1521
483
>>> string_to_delta(u'1w')
1522
484
datetime.timedelta(7)
1523
>>> string_to_delta(u'5m 30s')
1524
datetime.timedelta(0, 330)
1525
485
"""
1526
timevalue = datetime.timedelta(0)
1527
for s in interval.split():
1528
try:
1529
suffix = unicode(s[-1])
1530
value = int(s[:-1])
1531
if suffix == u"d":
1532
delta = datetime.timedelta(value)
1533
elif suffix == u"s":
1534
delta = datetime.timedelta(0, value)
1535
elif suffix == u"m":
1536
delta = datetime.timedelta(0, 0, 0, 0, value)
1537
elif suffix == u"h":
1538
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1539
elif suffix == u"w":
1540
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1541
else:
1542
raise ValueError(u"Unknown suffix %r" % suffix)
1543
except (ValueError, IndexError), e:
1544
raise ValueError(e.message)
1545
timevalue += delta
1546
return timevalue
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:
500
raise ValueError
501
except (ValueError, IndexError):
502
raise ValueError
503
return delta
504
505
506
def add_service():
507
"""Derived from the Avahi example code"""
508
global group, serviceName, serviceType, servicePort, serviceTXT, \
509
domain, host
510
if group is None:
511
group = dbus.Interface(
512
bus.get_object( avahi.DBUS_NAME,
513
server.EntryGroupNew()),
514
avahi.DBUS_INTERFACE_ENTRY_GROUP)
515
group.connect_to_signal('StateChanged',
516
entry_group_state_changed)
517
logger.debug(u"Adding service '%s' of type '%s' ...",
518
serviceName, serviceType)
519
520
group.AddService(
521
serviceInterface, # interface
522
avahi.PROTO_INET6, # protocol
523
dbus.UInt32(0), # flags
524
serviceName, serviceType,
525
domain, host,
526
dbus.UInt16(servicePort),
527
avahi.string_array_to_txt_array(serviceTXT))
528
group.Commit()
529
530
531
def remove_service():
532
"""From the Avahi example code"""
533
global group
534
535
if not group is None:
536
group.Reset()
537
538
539
def server_state_changed(state):
540
"""Derived from the Avahi example code"""
541
if state == avahi.SERVER_COLLISION:
542
logger.warning(u"Server name collision")
543
remove_service()
544
elif state == avahi.SERVER_RUNNING:
545
add_service()
546
547
548
def entry_group_state_changed(state, error):
549
"""Derived from the Avahi example code"""
550
global serviceName, server, rename_count
551
552
logger.debug(u"state change: %i", state)
553
554
if state == avahi.ENTRY_GROUP_ESTABLISHED:
555
logger.debug(u"Service established.")
556
elif state == avahi.ENTRY_GROUP_COLLISION:
557
558
rename_count = rename_count - 1
559
if rename_count > 0:
560
name = server.GetAlternativeServiceName(name)
561
logger.warning(u"Service name collision, "
562
u"changing name to '%s' ...", name)
563
remove_service()
564
add_service()
565
566
else:
567
logger.error(u"No suitable service name found after %i"
568
u" retries, exiting.", n_rename)
569
killme(1)
570
elif state == avahi.ENTRY_GROUP_FAILURE:
571
logger.error(u"Error in group state changed %s",
572
unicode(error))
573
killme(1)
1547
574
1548
575
1549
576
def if_nametoindex(interface):
1550
"""Call the C function if_nametoindex(), or equivalent
1551
1552
Note: This function cannot accept a unicode string."""
1553
global if_nametoindex
577
"""Call the C function if_nametoindex()"""
1554
578
try:
1555
if_nametoindex = (ctypes.cdll.LoadLibrary
1556
(ctypes.util.find_library(u"c"))
1557
.if_nametoindex)
579
libc = ctypes.cdll.LoadLibrary("libc.so.6")
580
return libc.if_nametoindex(interface)
1558
581
except (OSError, AttributeError):
1559
logger.warning(u"Doing if_nametoindex the hard way")
1560
def if_nametoindex(interface):
1561
"Get an interface index the hard way, i.e. using fcntl()"
1562
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1563
with contextlib.closing(socket.socket()) as s:
1564
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1565
struct.pack(str(u"16s16x"),
1566
interface))
1567
interface_index = struct.unpack(str(u"I"),
1568
ifreq[16:20])[0]
1569
return interface_index
1570
return if_nametoindex(interface)
1571
1572
1573
def daemon(nochdir = False, noclose = False):
582
if "struct" not in sys.modules:
583
import struct
584
if "fcntl" not in sys.modules:
585
import fcntl
586
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
587
s = socket.socket()
588
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
589
struct.pack("16s16x", interface))
590
s.close()
591
interface_index = struct.unpack("I", ifreq[16:20])[0]
592
return interface_index
593
594
595
def daemon(nochdir, noclose):
1574
596
"""See daemon(3). Standard BSD Unix function.
1575
1576
597
This should really exist as os.daemon, but it doesn't (yet)."""
1577
598
if os.fork():
1578
599
sys.exit()
1579
600
os.setsid()
1580
601
if not nochdir:
1581
os.chdir(u"/")
1582
if os.fork():
1583
sys.exit()
602
os.chdir("/")
1584
603
if not noclose:
1585
604
# Close all standard open file descriptors
1586
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
605
null = os.open("/dev/null", os.O_NOCTTY | os.O_RDWR)
1587
606
if not stat.S_ISCHR(os.fstat(null).st_mode):
1588
607
raise OSError(errno.ENODEV,
1589
u"%s not a character device"
1590
% os.path.devnull)
608
"/dev/null not a character device")
1591
609
os.dup2(null, sys.stdin.fileno())
1592
610
os.dup2(null, sys.stdout.fileno())
1593
611
os.dup2(null, sys.stderr.fileno())
1595
613
os.close(null)
1596
614
1597
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
1598
625
def main():
1599
1600
##################################################################
1601
# Parsing of options, both command line and config file
1602
1603
parser = optparse.OptionParser(version = "%%prog %s" % version)
1604
parser.add_option("-i", u"--interface", type=u"string",
1605
metavar="IF", help=u"Bind to interface IF")
1606
parser.add_option("-a", u"--address", type=u"string",
1607
help=u"Address to listen for requests on")
1608
parser.add_option("-p", u"--port", type=u"int",
1609
help=u"Port number to receive requests on")
1610
parser.add_option("--check", action=u"store_true",
1611
help=u"Run self-test")
1612
parser.add_option("--debug", action=u"store_true",
1613
help=u"Debug mode; run in foreground and log to"
1614
u" terminal")
1615
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1616
u" priority string (see GnuTLS documentation)")
1617
parser.add_option("--servicename", type=u"string",
1618
metavar=u"NAME", help=u"Zeroconf service name")
1619
parser.add_option("--configdir", type=u"string",
1620
default=u"/etc/mandos", metavar=u"DIR",
1621
help=u"Directory to search for configuration"
1622
u" files")
1623
parser.add_option("--no-dbus", action=u"store_false",
1624
dest=u"use_dbus", help=u"Do not provide D-Bus"
1625
u" system bus interface")
1626
parser.add_option("--no-ipv6", action=u"store_false",
1627
dest=u"use_ipv6", help=u"Do not use IPv6")
1628
options = parser.parse_args()[0]
626
global exitstatus
627
exitstatus = 0
628
global main_loop_started
629
main_loop_started = False
630
631
parser = OptionParser()
632
parser.add_option("-i", "--interface", type="string",
633
default=None, metavar="IF",
634
help="Bind to interface IF")
635
parser.add_option("-a", "--address", type="string", default=None,
636
help="Address to listen for requests on")
637
parser.add_option("-p", "--port", type="int", default=None,
638
help="Port number to receive requests on")
639
parser.add_option("--timeout", type="string", # Parsed later
640
default="1h",
641
help="Amount of downtime allowed for clients")
642
parser.add_option("--interval", type="string", # Parsed later
643
default="5m",
644
help="How often to check that a client is up")
645
parser.add_option("--check", action="store_true", default=False,
646
help="Run self-test")
647
parser.add_option("--debug", action="store_true", default=False,
648
help="Debug mode")
649
(options, args) = parser.parse_args()
1629
650
1630
651
if options.check:
1631
652
import doctest
1632
653
doctest.testmod()
1633
654
sys.exit()
1634
655
1635
# Default values for config file for server-global settings
1636
server_defaults = { u"interface": u"",
1637
u"address": u"",
1638
u"port": u"",
1639
u"debug": u"False",
1640
u"priority":
1641
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1642
u"servicename": u"Mandos",
1643
u"use_dbus": u"True",
1644
u"use_ipv6": u"True",
1645
}
1646
1647
# Parse config file for server-global settings
1648
server_config = configparser.SafeConfigParser(server_defaults)
1649
del server_defaults
1650
server_config.read(os.path.join(options.configdir,
1651
u"mandos.conf"))
1652
# Convert the SafeConfigParser object to a dict
1653
server_settings = server_config.defaults()
1654
# Use the appropriate methods on the non-string config options
1655
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1656
server_settings[option] = server_config.getboolean(u"DEFAULT",
1657
option)
1658
if server_settings["port"]:
1659
server_settings["port"] = server_config.getint(u"DEFAULT",
1660
u"port")
1661
del server_config
1662
1663
# Override the settings from the config file with command line
1664
# options, if set.
1665
for option in (u"interface", u"address", u"port", u"debug",
1666
u"priority", u"servicename", u"configdir",
1667
u"use_dbus", u"use_ipv6"):
1668
value = getattr(options, option)
1669
if value is not None:
1670
server_settings[option] = value
1671
del options
1672
# Force all strings to be unicode
1673
for option in server_settings.keys():
1674
if type(server_settings[option]) is str:
1675
server_settings[option] = unicode(server_settings[option])
1676
# Now we have our good server settings in "server_settings"
1677
1678
##################################################################
1679
1680
# For convenience
1681
debug = server_settings[u"debug"]
1682
use_dbus = server_settings[u"use_dbus"]
1683
use_ipv6 = server_settings[u"use_ipv6"]
1684
1685
if not debug:
1686
syslogger.setLevel(logging.WARNING)
1687
console.setLevel(logging.WARNING)
1688
1689
if server_settings[u"servicename"] != u"Mandos":
1690
syslogger.setFormatter(logging.Formatter
1691
(u'Mandos (%s) [%%(process)d]:'
1692
u' %%(levelname)s: %%(message)s'
1693
% server_settings[u"servicename"]))
1694
1695
# Parse config file with clients
1696
client_defaults = { u"timeout": u"1h",
1697
u"interval": u"5m",
1698
u"checker": u"fping -q -- %%(host)s",
1699
u"host": u"",
1700
u"approved_delay": u"0s",
1701
u"approved_duration": u"1s",
1702
}
1703
client_config = configparser.SafeConfigParser(client_defaults)
1704
client_config.read(os.path.join(server_settings[u"configdir"],
1705
u"clients.conf"))
1706
1707
global mandos_dbus_service
1708
mandos_dbus_service = None
1709
1710
tcp_server = MandosServer((server_settings[u"address"],
1711
server_settings[u"port"]),
1712
ClientHandler,
1713
interface=server_settings[u"interface"],
1714
use_ipv6=use_ipv6,
1715
gnutls_priority=
1716
server_settings[u"priority"],
1717
use_dbus=use_dbus)
1718
pidfilename = u"/var/run/mandos.pid"
1719
try:
1720
pidfile = open(pidfilename, u"w")
1721
except IOError:
1722
logger.error(u"Could not open file %r", pidfilename)
1723
1724
try:
1725
uid = pwd.getpwnam(u"_mandos").pw_uid
1726
gid = pwd.getpwnam(u"_mandos").pw_gid
1727
except KeyError:
1728
try:
1729
uid = pwd.getpwnam(u"mandos").pw_uid
1730
gid = pwd.getpwnam(u"mandos").pw_gid
1731
except KeyError:
1732
try:
1733
uid = pwd.getpwnam(u"nobody").pw_uid
1734
gid = pwd.getpwnam(u"nobody").pw_gid
1735
except KeyError:
1736
uid = 65534
1737
gid = 65534
1738
try:
1739
os.setgid(gid)
1740
os.setuid(uid)
1741
except OSError, error:
1742
if error[0] != errno.EPERM:
1743
raise error
1744
1745
# Enable all possible GnuTLS debugging
1746
if debug:
1747
# "Use a log level over 10 to enable all debugging options."
1748
# - GnuTLS manual
1749
gnutls.library.functions.gnutls_global_set_log_level(11)
1750
1751
@gnutls.library.types.gnutls_log_func
1752
def debug_gnutls(level, string):
1753
logger.debug(u"GnuTLS: %s", string[:-1])
1754
1755
(gnutls.library.functions
1756
.gnutls_global_set_log_function(debug_gnutls))
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")
1757
671
1758
672
global main_loop
673
global bus
674
global server
1759
675
# From the Avahi example code
1760
676
DBusGMainLoop(set_as_default=True )
1761
677
main_loop = gobject.MainLoop()
1762
678
bus = dbus.SystemBus()
679
server = dbus.Interface(
680
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
681
avahi.DBUS_INTERFACE_SERVER )
1763
682
# End of Avahi example code
1764
if use_dbus:
1765
try:
1766
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1767
bus, do_not_queue=True)
1768
except dbus.exceptions.NameExistsException, e:
1769
logger.error(unicode(e) + u", disabling D-Bus")
1770
use_dbus = False
1771
server_settings[u"use_dbus"] = False
1772
tcp_server.use_dbus = False
1773
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1774
service = AvahiService(name = server_settings[u"servicename"],
1775
servicetype = u"_mandos._tcp",
1776
protocol = protocol, bus = bus)
1777
if server_settings["interface"]:
1778
service.interface = (if_nametoindex
1779
(str(server_settings[u"interface"])))
1780
1781
client_class = Client
1782
if use_dbus:
1783
client_class = functools.partial(ClientDBus, bus = bus)
1784
def client_config_items(config, section):
1785
special_settings = {
1786
"approved_by_default":
1787
lambda: config.getboolean(section,
1788
"approved_by_default"),
1789
}
1790
for name, value in config.items(section):
1791
try:
1792
yield (name, special_settings[name]())
1793
except KeyError:
1794
yield (name, value)
1795
1796
tcp_server.clients.update(set(
1797
client_class(name = section,
1798
config= dict(client_config_items(
1799
client_config, section)))
1800
for section in client_config.sections()))
1801
if not tcp_server.clients:
1802
logger.warning(u"No clients defined")
683
684
debug = options.debug
1803
685
1804
686
if debug:
1805
# Redirect stdin so all checkers get /dev/null
1806
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1807
os.dup2(null, sys.stdin.fileno())
1808
if null > 2:
1809
os.close(null)
1810
else:
1811
# No console logging
1812
logger.removeHandler(console)
1813
# Close all input and output, do double fork, etc.
1814
daemon()
1815
1816
try:
1817
with pidfile:
1818
pid = os.getpid()
1819
pidfile.write(str(pid) + "\n")
1820
del pidfile
1821
except IOError:
1822
logger.error(u"Could not write to file %r with PID %d",
1823
pidfilename, pid)
1824
except NameError:
1825
# "pidfile" was never created
1826
pass
1827
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()))
1828
706
1829
707
if not debug:
1830
signal.signal(signal.SIGINT, signal.SIG_IGN)
1831
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1832
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1833
1834
if use_dbus:
1835
class MandosDBusService(dbus.service.Object):
1836
"""A D-Bus proxy object"""
1837
def __init__(self):
1838
dbus.service.Object.__init__(self, bus, u"/")
1839
_interface = u"se.bsnet.fukt.Mandos"
1840
1841
@dbus.service.signal(_interface, signature=u"o")
1842
def ClientAdded(self, objpath):
1843
"D-Bus signal"
1844
pass
1845
1846
@dbus.service.signal(_interface, signature=u"ss")
1847
def ClientNotFound(self, fingerprint, address):
1848
"D-Bus signal"
1849
pass
1850
1851
@dbus.service.signal(_interface, signature=u"os")
1852
def ClientRemoved(self, objpath, name):
1853
"D-Bus signal"
1854
pass
1855
1856
@dbus.service.method(_interface, out_signature=u"ao")
1857
def GetAllClients(self):
1858
"D-Bus method"
1859
return dbus.Array(c.dbus_object_path
1860
for c in tcp_server.clients)
1861
1862
@dbus.service.method(_interface,
1863
out_signature=u"a{oa{sv}}")
1864
def GetAllClientsWithProperties(self):
1865
"D-Bus method"
1866
return dbus.Dictionary(
1867
((c.dbus_object_path, c.GetAll(u""))
1868
for c in tcp_server.clients),
1869
signature=u"oa{sv}")
1870
1871
@dbus.service.method(_interface, in_signature=u"o")
1872
def RemoveClient(self, object_path):
1873
"D-Bus method"
1874
for c in tcp_server.clients:
1875
if c.dbus_object_path == object_path:
1876
tcp_server.clients.remove(c)
1877
c.remove_from_connection()
1878
# Don't signal anything except ClientRemoved
1879
c.disable(quiet=True)
1880
# Emit D-Bus signal
1881
self.ClientRemoved(object_path, c.name)
1882
return
1883
raise KeyError(object_path)
1884
1885
del _interface
1886
1887
mandos_dbus_service = MandosDBusService()
708
daemon(False, False)
1888
709
1889
710
def cleanup():
1890
711
"Cleanup function; run on exit"
1891
service.cleanup()
1892
1893
while tcp_server.clients:
1894
client = tcp_server.clients.pop()
1895
if use_dbus:
1896
client.remove_from_connection()
1897
client.disable_hook = None
1898
# Don't signal anything except ClientRemoved
1899
client.disable(quiet=True)
1900
if use_dbus:
1901
# Emit D-Bus signal
1902
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1903
client.name)
1904
1905
atexit.register(cleanup)
1906
1907
for client in tcp_server.clients:
1908
if use_dbus:
1909
# Emit D-Bus signal
1910
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1911
client.enable()
1912
1913
tcp_server.enable()
1914
tcp_server.server_activate()
1915
1916
# Find out what port we got
1917
service.port = tcp_server.socket.getsockname()[1]
1918
if use_ipv6:
1919
logger.info(u"Now listening on address %r, port %d,"
1920
" flowinfo %d, scope_id %d"
1921
% tcp_server.socket.getsockname())
1922
else: # IPv4
1923
logger.info(u"Now listening on address %r, port %d"
1924
% tcp_server.socket.getsockname())
1925
1926
#service.interface = tcp_server.socket.getsockname()[3]
1927
1928
try:
712
global group
1929
713
# From the Avahi example code
1930
try:
1931
service.activate()
1932
except dbus.exceptions.DBusException, error:
1933
logger.critical(u"DBusException: %s", error)
1934
cleanup()
1935
sys.exit(1)
714
if not group is None:
715
group.Free()
716
group = None
1936
717
# End of Avahi example code
1937
718
1938
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1939
lambda *args, **kwargs:
1940
(tcp_server.handle_request
1941
(*args[2:], **kwargs) or True))
1942
1943
logger.debug(u"Starting main loop")
719
while clients:
720
client = clients.pop()
721
client.stop_hook = None
722
client.stop()
723
724
atexit.register(cleanup)
725
726
if not debug:
727
signal.signal(signal.SIGINT, signal.SIG_IGN)
728
signal.signal(signal.SIGHUP, lambda signum, frame: killme())
729
signal.signal(signal.SIGTERM, lambda signum, frame: killme())
730
731
for client in clients:
732
client.start()
733
734
tcp_server = IPv6_TCPServer((options.address, options.port),
735
tcp_handler,
736
options=options,
737
clients=clients)
738
# Find out what random port we got
739
global servicePort
740
servicePort = tcp_server.socket.getsockname()[1]
741
logger.debug(u"Now listening on port %d", servicePort)
742
743
if options.interface is not None:
744
global serviceInterface
745
serviceInterface = if_nametoindex(options.interface)
746
747
# From the Avahi example code
748
server.connect_to_signal("StateChanged", server_state_changed)
749
try:
750
server_state_changed(server.GetState())
751
except dbus.exceptions.DBusException, error:
752
logger.critical(u"DBusException: %s", error)
753
killme(1)
754
# End of Avahi example code
755
756
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
757
lambda *args, **kwargs:
758
tcp_server.handle_request(*args[2:],
759
**kwargs) or True)
760
try:
761
logger.debug("Starting main loop")
762
main_loop_started = True
1944
763
main_loop.run()
1945
except AvahiError, error:
1946
logger.critical(u"AvahiError: %s", error)
1947
cleanup()
1948
sys.exit(1)
1949
764
except KeyboardInterrupt:
1950
765
if debug:
1951
print >> sys.stderr
1952
logger.debug(u"Server received KeyboardInterrupt")
1953
logger.debug(u"Server exiting")
1954
# Must run before the D-Bus bus name gets deregistered
1955
cleanup()
766
print
767
768
sys.exit(exitstatus)
1956
769
1957
770
if __name__ == '__main__':
1958
771
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0