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- Committer: Björn Påhlsson
- Date: 2008-08-24 10:19:59 UTC
- mfrom: (98 mandos)
- mto: (24.1.154 mandos) (237.4.3 mandos-release)
- mto: This revision was merged to the branch mainline in revision 99.
- Revision ID: belorn@braxen-20080824101959-cbs6x05jwgqrlp2s
merge + fallback bugg
- files added:
- plugins.d/usplash
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- Makefile
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# 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
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
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# and some lines in "main".
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#
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# Everything else is
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# Copyright © 2008,2009 Teddy Hogeborn
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# Copyright © 2008,2009 Björn Påhlsson
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# 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
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17
# it under the terms of the GNU General Public License as published by
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
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# 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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#
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31
34
from __future__ import division, with_statement, absolute_import
32
from __future__ import division
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33
36
import SocketServer as socketserver
34
import SocketServer
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35
import socket
38
import optparse
36
import select
37
from optparse import OptionParser
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38
import datetime
40
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import errno
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40
import gnutls.crypto
44
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import gnutls.library.functions
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import gnutls.library.constants
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45
import gnutls.library.types
47
import ConfigParser as configparser
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import ConfigParser
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import sys
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import re
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import os
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import signal
51
from sets import Set
52
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import subprocess
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import atexit
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54
import stat
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import logging
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56
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 select
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57
65
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import dbus
66
import dbus.service
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59
import gobject
68
60
import avahi
69
61
from dbus.mainloop.glib import DBusGMainLoop
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62
import ctypes
71
import ctypes.util
72
import xml.dom.minidom
73
import inspect
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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.Logger(u'mandos')
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syslogger = (logging.handlers.SysLogHandler
88
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log"))
90
syslogger.setFormatter(logging.Formatter
91
(u'Mandos [%(process)d]: %(levelname)s:'
92
u' %(message)s'))
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64
version = "1.0"
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logger = logging.Logger('mandos')
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syslogger = logging.handlers.SysLogHandler\
68
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log")
70
syslogger.setFormatter(logging.Formatter\
71
('Mandos: %(levelname)s: %(message)s'))
93
72
logger.addHandler(syslogger)
94
73
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console = logging.StreamHandler()
96
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
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u' %(levelname)s:'
98
u' %(message)s'))
75
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
76
' %(message)s'))
99
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logger.addHandler(console)
100
78
101
79
class AvahiError(Exception):
102
def __init__(self, value, *args, **kwargs):
80
def __init__(self, value):
103
81
self.value = value
104
super(AvahiError, self).__init__(value, *args, **kwargs)
105
def __unicode__(self):
106
return unicode(repr(self.value))
82
def __str__(self):
83
return repr(self.value)
107
84
108
85
class AvahiServiceError(AvahiError):
109
86
pass
114
91
115
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class AvahiService(object):
116
93
"""An Avahi (Zeroconf) service.
117
118
94
Attributes:
119
95
interface: integer; avahi.IF_UNSPEC or an interface index.
120
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Used to optionally bind to the specified interface.
121
name: string; Example: u'Mandos'
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type: string; Example: u'_mandos._tcp'.
97
name: string; Example: 'Mandos'
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type: string; Example: '_mandos._tcp'.
123
99
See <http://www.dns-sd.org/ServiceTypes.html>
124
100
port: integer; what port to announce
125
101
TXT: list of strings; TXT record for the service
128
104
max_renames: integer; maximum number of renames
129
105
rename_count: integer; counter so we only rename after collisions
130
106
a sensible number of times
131
group: D-Bus Entry Group
132
server: D-Bus Server
133
bus: dbus.SystemBus()
134
107
"""
135
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def __init__(self, interface = avahi.IF_UNSPEC, name = None,
136
servicetype = None, port = None, TXT = None,
137
domain = u"", host = u"", max_renames = 32768,
138
protocol = avahi.PROTO_UNSPEC, bus = None):
109
type = None, port = None, TXT = None, domain = "",
110
host = "", max_renames = 32768):
139
111
self.interface = interface
140
112
self.name = name
141
self.type = servicetype
113
self.type = type
142
114
self.port = port
143
self.TXT = TXT if TXT is not None else []
115
if TXT is None:
116
self.TXT = []
117
else:
118
self.TXT = TXT
144
119
self.domain = domain
145
120
self.host = host
146
121
self.rename_count = 0
147
122
self.max_renames = max_renames
148
self.protocol = protocol
149
self.group = None # our entry group
150
self.server = None
151
self.bus = bus
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123
def rename(self):
153
124
"""Derived from the Avahi example code"""
154
125
if self.rename_count >= self.max_renames:
155
logger.critical(u"No suitable Zeroconf service name found"
156
u" after %i retries, exiting.",
157
self.rename_count)
158
raise AvahiServiceError(u"Too many renames")
159
self.name = self.server.GetAlternativeServiceName(self.name)
160
logger.info(u"Changing Zeroconf service name to %r ...",
161
unicode(self.name))
162
syslogger.setFormatter(logging.Formatter
163
(u'Mandos (%s) [%%(process)d]:'
164
u' %%(levelname)s: %%(message)s'
165
% self.name))
126
logger.critical(u"No suitable service name found after %i"
127
u" retries, exiting.", rename_count)
128
raise AvahiServiceError("Too many renames")
129
self.name = server.GetAlternativeServiceName(self.name)
130
logger.info(u"Changing name to %r ...", str(self.name))
131
syslogger.setFormatter(logging.Formatter\
132
('Mandos (%s): %%(levelname)s:'
133
' %%(message)s' % self.name))
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134
self.remove()
167
135
self.add()
168
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self.rename_count += 1
169
137
def remove(self):
170
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"""Derived from the Avahi example code"""
171
if self.group is not None:
172
self.group.Reset()
139
if group is not None:
140
group.Reset()
173
141
def add(self):
174
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"""Derived from the Avahi example code"""
175
if self.group is None:
176
self.group = dbus.Interface(
177
self.bus.get_object(avahi.DBUS_NAME,
178
self.server.EntryGroupNew()),
179
avahi.DBUS_INTERFACE_ENTRY_GROUP)
180
self.group.connect_to_signal('StateChanged',
181
self
182
.entry_group_state_changed)
183
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
184
self.name, self.type)
185
self.group.AddService(
186
self.interface,
187
self.protocol,
188
dbus.UInt32(0), # flags
189
self.name, self.type,
190
self.domain, self.host,
191
dbus.UInt16(self.port),
192
avahi.string_array_to_txt_array(self.TXT))
193
self.group.Commit()
194
def entry_group_state_changed(self, state, error):
195
"""Derived from the Avahi example code"""
196
logger.debug(u"Avahi entry group state change: %i", state)
197
198
if state == avahi.ENTRY_GROUP_ESTABLISHED:
199
logger.debug(u"Zeroconf service established.")
200
elif state == avahi.ENTRY_GROUP_COLLISION:
201
logger.warning(u"Zeroconf service name collision.")
202
self.rename()
203
elif state == avahi.ENTRY_GROUP_FAILURE:
204
logger.critical(u"Avahi: Error in group state changed %s",
205
unicode(error))
206
raise AvahiGroupError(u"State changed: %s"
207
% unicode(error))
208
def cleanup(self):
209
"""Derived from the Avahi example code"""
210
if self.group is not None:
211
self.group.Free()
212
self.group = None
213
def server_state_changed(self, state):
214
"""Derived from the Avahi example code"""
215
logger.debug(u"Avahi server state change: %i", state)
216
if state == avahi.SERVER_COLLISION:
217
logger.error(u"Zeroconf server name collision")
218
self.remove()
219
elif state == avahi.SERVER_RUNNING:
220
self.add()
221
def activate(self):
222
"""Derived from the Avahi example code"""
223
if self.server is None:
224
self.server = dbus.Interface(
225
self.bus.get_object(avahi.DBUS_NAME,
226
avahi.DBUS_PATH_SERVER),
227
avahi.DBUS_INTERFACE_SERVER)
228
self.server.connect_to_signal(u"StateChanged",
229
self.server_state_changed)
230
self.server_state_changed(self.server.GetState())
143
global group
144
if group is None:
145
group = dbus.Interface\
146
(bus.get_object(avahi.DBUS_NAME,
147
server.EntryGroupNew()),
148
avahi.DBUS_INTERFACE_ENTRY_GROUP)
149
group.connect_to_signal('StateChanged',
150
entry_group_state_changed)
151
logger.debug(u"Adding service '%s' of type '%s' ...",
152
service.name, service.type)
153
group.AddService(
154
self.interface, # interface
155
avahi.PROTO_INET6, # protocol
156
dbus.UInt32(0), # flags
157
self.name, self.type,
158
self.domain, self.host,
159
dbus.UInt16(self.port),
160
avahi.string_array_to_txt_array(self.TXT))
161
group.Commit()
162
163
# From the Avahi example code:
164
group = None # our entry group
165
# End of Avahi example code
231
166
232
167
233
168
class Client(object):
234
169
"""A representation of a client host served by this server.
235
236
170
Attributes:
237
name: string; from the config file, used in log messages and
238
D-Bus identifiers
171
name: string; from the config file, used in log messages
239
172
fingerprint: string (40 or 32 hexadecimal digits); used to
240
173
uniquely identify the client
241
secret: bytestring; sent verbatim (over TLS) to client
242
host: string; available for use by the checker command
243
created: datetime.datetime(); (UTC) object creation
244
last_enabled: datetime.datetime(); (UTC)
245
enabled: bool()
246
last_checked_ok: datetime.datetime(); (UTC) or None
247
timeout: datetime.timedelta(); How long from last_checked_ok
248
until this client is disabled
249
interval: datetime.timedelta(); How often to start a new checker
250
disable_hook: If set, called by disable() as disable_hook(self)
251
checker: subprocess.Popen(); a running checker process used
252
to see if the client lives.
253
'None' if no process is running.
174
secret: bytestring; sent verbatim (over TLS) to client
175
host: string; available for use by the checker command
176
created: datetime.datetime(); object creation, not client host
177
last_checked_ok: datetime.datetime() or None if not yet checked OK
178
timeout: datetime.timedelta(); How long from last_checked_ok
179
until this client is invalid
180
interval: datetime.timedelta(); How often to start a new checker
181
stop_hook: If set, called by stop() as stop_hook(self)
182
checker: subprocess.Popen(); a running checker process used
183
to see if the client lives.
184
'None' if no process is running.
254
185
checker_initiator_tag: a gobject event source tag, or None
255
disable_initiator_tag: - '' -
186
stop_initiator_tag: - '' -
256
187
checker_callback_tag: - '' -
257
188
checker_command: string; External command which is run to check if
258
189
client lives. %() expansions are done at
259
190
runtime with vars(self) as dict, so that for
260
191
instance %(name)s can be used in the command.
261
current_checker_command: string; current running checker_command
192
Private attibutes:
193
_timeout: Real variable for 'timeout'
194
_interval: Real variable for 'interval'
195
_timeout_milliseconds: Used when calling gobject.timeout_add()
196
_interval_milliseconds: - '' -
262
197
"""
263
264
@staticmethod
265
def _timedelta_to_milliseconds(td):
266
"Convert a datetime.timedelta() to milliseconds"
267
return ((td.days * 24 * 60 * 60 * 1000)
268
+ (td.seconds * 1000)
269
+ (td.microseconds // 1000))
270
271
def timeout_milliseconds(self):
272
"Return the 'timeout' attribute in milliseconds"
273
return self._timedelta_to_milliseconds(self.timeout)
274
275
def interval_milliseconds(self):
276
"Return the 'interval' attribute in milliseconds"
277
return self._timedelta_to_milliseconds(self.interval)
278
279
def __init__(self, name = None, disable_hook=None, config=None):
198
def _set_timeout(self, timeout):
199
"Setter function for 'timeout' attribute"
200
self._timeout = timeout
201
self._timeout_milliseconds = ((self.timeout.days
202
* 24 * 60 * 60 * 1000)
203
+ (self.timeout.seconds * 1000)
204
+ (self.timeout.microseconds
205
// 1000))
206
timeout = property(lambda self: self._timeout,
207
_set_timeout)
208
del _set_timeout
209
def _set_interval(self, interval):
210
"Setter function for 'interval' attribute"
211
self._interval = interval
212
self._interval_milliseconds = ((self.interval.days
213
* 24 * 60 * 60 * 1000)
214
+ (self.interval.seconds
215
* 1000)
216
+ (self.interval.microseconds
217
// 1000))
218
interval = property(lambda self: self._interval,
219
_set_interval)
220
del _set_interval
221
def __init__(self, name = None, stop_hook=None, config={}):
280
222
"""Note: the 'checker' key in 'config' sets the
281
223
'checker_command' attribute and *not* the 'checker'
282
224
attribute."""
283
225
self.name = name
284
if config is None:
285
config = {}
286
226
logger.debug(u"Creating client %r", self.name)
287
227
# Uppercase and remove spaces from fingerprint for later
288
228
# comparison purposes with return value from the fingerprint()
289
229
# function
290
self.fingerprint = (config[u"fingerprint"].upper()
291
.replace(u" ", u""))
230
self.fingerprint = config["fingerprint"].upper()\
231
.replace(u" ", u"")
292
232
logger.debug(u" Fingerprint: %s", self.fingerprint)
293
if u"secret" in config:
294
self.secret = config[u"secret"].decode(u"base64")
295
elif u"secfile" in config:
296
with open(os.path.expanduser(os.path.expandvars
297
(config[u"secfile"])),
298
"rb") as secfile:
299
self.secret = secfile.read()
233
if "secret" in config:
234
self.secret = config["secret"].decode(u"base64")
235
elif "secfile" in config:
236
sf = open(config["secfile"])
237
self.secret = sf.read()
238
sf.close()
300
239
else:
301
240
raise TypeError(u"No secret or secfile for client %s"
302
241
% self.name)
303
self.host = config.get(u"host", u"")
304
self.created = datetime.datetime.utcnow()
305
self.enabled = False
306
self.last_enabled = None
242
self.host = config.get("host", "")
243
self.created = datetime.datetime.now()
307
244
self.last_checked_ok = None
308
self.timeout = string_to_delta(config[u"timeout"])
309
self.interval = string_to_delta(config[u"interval"])
310
self.disable_hook = disable_hook
245
self.timeout = string_to_delta(config["timeout"])
246
self.interval = string_to_delta(config["interval"])
247
self.stop_hook = stop_hook
311
248
self.checker = None
312
249
self.checker_initiator_tag = None
313
self.disable_initiator_tag = None
250
self.stop_initiator_tag = None
314
251
self.checker_callback_tag = None
315
self.checker_command = config[u"checker"]
316
self.current_checker_command = None
317
self.last_connect = None
318
319
def enable(self):
252
self.check_command = config["checker"]
253
def start(self):
320
254
"""Start this client's checker and timeout hooks"""
321
if getattr(self, u"enabled", False):
322
# Already enabled
323
return
324
self.last_enabled = datetime.datetime.utcnow()
325
255
# Schedule a new checker to be started an 'interval' from now,
326
256
# and every interval from then on.
327
self.checker_initiator_tag = (gobject.timeout_add
328
(self.interval_milliseconds(),
329
self.start_checker))
330
# Schedule a disable() when 'timeout' has passed
331
self.disable_initiator_tag = (gobject.timeout_add
332
(self.timeout_milliseconds(),
333
self.disable))
334
self.enabled = True
257
self.checker_initiator_tag = gobject.timeout_add\
258
(self._interval_milliseconds,
259
self.start_checker)
335
260
# Also start a new checker *right now*.
336
261
self.start_checker()
337
338
def disable(self, quiet=True):
339
"""Disable this client."""
340
if not getattr(self, "enabled", False):
262
# Schedule a stop() when 'timeout' has passed
263
self.stop_initiator_tag = gobject.timeout_add\
264
(self._timeout_milliseconds,
265
self.stop)
266
def stop(self):
267
"""Stop this client.
268
The possibility that a client might be restarted is left open,
269
but not currently used."""
270
# If this client doesn't have a secret, it is already stopped.
271
if hasattr(self, "secret") and self.secret:
272
logger.info(u"Stopping client %s", self.name)
273
self.secret = None
274
else:
341
275
return False
342
if not quiet:
343
logger.info(u"Disabling client %s", self.name)
344
if getattr(self, u"disable_initiator_tag", False):
345
gobject.source_remove(self.disable_initiator_tag)
346
self.disable_initiator_tag = None
347
if getattr(self, u"checker_initiator_tag", False):
276
if getattr(self, "stop_initiator_tag", False):
277
gobject.source_remove(self.stop_initiator_tag)
278
self.stop_initiator_tag = None
279
if getattr(self, "checker_initiator_tag", False):
348
280
gobject.source_remove(self.checker_initiator_tag)
349
281
self.checker_initiator_tag = None
350
282
self.stop_checker()
351
if self.disable_hook:
352
self.disable_hook(self)
353
self.enabled = False
283
if self.stop_hook:
284
self.stop_hook(self)
354
285
# Do not run this again if called by a gobject.timeout_add
355
286
return False
356
357
287
def __del__(self):
358
self.disable_hook = None
359
self.disable()
360
361
def checker_callback(self, pid, condition, command):
288
self.stop_hook = None
289
self.stop()
290
def checker_callback(self, pid, condition):
362
291
"""The checker has completed, so take appropriate actions."""
292
now = datetime.datetime.now()
363
293
self.checker_callback_tag = None
364
294
self.checker = None
365
if os.WIFEXITED(condition):
366
exitstatus = os.WEXITSTATUS(condition)
367
if exitstatus == 0:
368
logger.info(u"Checker for %(name)s succeeded",
369
vars(self))
370
self.checked_ok()
371
else:
372
logger.info(u"Checker for %(name)s failed",
373
vars(self))
374
else:
295
if os.WIFEXITED(condition) \
296
and (os.WEXITSTATUS(condition) == 0):
297
logger.info(u"Checker for %(name)s succeeded",
298
vars(self))
299
self.last_checked_ok = now
300
gobject.source_remove(self.stop_initiator_tag)
301
self.stop_initiator_tag = gobject.timeout_add\
302
(self._timeout_milliseconds,
303
self.stop)
304
elif not os.WIFEXITED(condition):
375
305
logger.warning(u"Checker for %(name)s crashed?",
376
306
vars(self))
377
378
def checked_ok(self):
379
"""Bump up the timeout for this client.
380
381
This should only be called when the client has been seen,
382
alive and well.
383
"""
384
self.last_checked_ok = datetime.datetime.utcnow()
385
gobject.source_remove(self.disable_initiator_tag)
386
self.disable_initiator_tag = (gobject.timeout_add
387
(self.timeout_milliseconds(),
388
self.disable))
389
307
else:
308
logger.info(u"Checker for %(name)s failed",
309
vars(self))
390
310
def start_checker(self):
391
311
"""Start a new checker subprocess if one is not running.
392
393
312
If a checker already exists, leave it running and do
394
313
nothing."""
395
314
# The reason for not killing a running checker is that if we
398
317
# client would inevitably timeout, since no checker would get
399
318
# a chance to run to completion. If we instead leave running
400
319
# checkers alone, the checker would have to take more time
401
# than 'timeout' for the client to be disabled, which is as it
402
# should be.
403
404
# If a checker exists, make sure it is not a zombie
405
try:
406
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
407
except (AttributeError, OSError), error:
408
if (isinstance(error, OSError)
409
and error.errno != errno.ECHILD):
410
raise error
411
else:
412
if pid:
413
logger.warning(u"Checker was a zombie")
414
gobject.source_remove(self.checker_callback_tag)
415
self.checker_callback(pid, status,
416
self.current_checker_command)
417
# Start a new checker if needed
320
# than 'timeout' for the client to be declared invalid, which
321
# is as it should be.
418
322
if self.checker is None:
419
323
try:
420
# In case checker_command has exactly one % operator
421
command = self.checker_command % self.host
324
# In case check_command has exactly one % operator
325
command = self.check_command % self.host
422
326
except TypeError:
423
327
# Escape attributes for the shell
424
escaped_attrs = dict((key,
425
re.escape(unicode(str(val),
426
errors=
427
u'replace')))
328
escaped_attrs = dict((key, re.escape(str(val)))
428
329
for key, val in
429
330
vars(self).iteritems())
430
331
try:
431
command = self.checker_command % escaped_attrs
332
command = self.check_command % escaped_attrs
432
333
except TypeError, error:
433
334
logger.error(u'Could not format string "%s":'
434
u' %s', self.checker_command, error)
335
u' %s', self.check_command, error)
435
336
return True # Try again later
436
self.current_checker_command = command
437
337
try:
438
338
logger.info(u"Starting checker %r for %s",
439
339
command, self.name)
443
343
# always replaced by /dev/null.)
444
344
self.checker = subprocess.Popen(command,
445
345
close_fds=True,
446
shell=True, cwd=u"/")
447
self.checker_callback_tag = (gobject.child_watch_add
448
(self.checker.pid,
449
self.checker_callback,
450
data=command))
451
# The checker may have completed before the gobject
452
# watch was added. Check for this.
453
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
454
if pid:
455
gobject.source_remove(self.checker_callback_tag)
456
self.checker_callback(pid, status, command)
346
shell=True, cwd="/")
347
self.checker_callback_tag = gobject.child_watch_add\
348
(self.checker.pid,
349
self.checker_callback)
457
350
except OSError, error:
458
351
logger.error(u"Failed to start subprocess: %s",
459
352
error)
460
353
# Re-run this periodically if run by gobject.timeout_add
461
354
return True
462
463
355
def stop_checker(self):
464
356
"""Force the checker process, if any, to stop."""
465
357
if self.checker_callback_tag:
466
358
gobject.source_remove(self.checker_callback_tag)
467
359
self.checker_callback_tag = None
468
if getattr(self, u"checker", None) is None:
360
if getattr(self, "checker", None) is None:
469
361
return
470
362
logger.debug(u"Stopping checker for %(name)s", vars(self))
471
363
try:
472
364
os.kill(self.checker.pid, signal.SIGTERM)
473
#time.sleep(0.5)
365
#os.sleep(0.5)
474
366
#if self.checker.poll() is None:
475
367
# os.kill(self.checker.pid, signal.SIGKILL)
476
368
except OSError, error:
477
369
if error.errno != errno.ESRCH: # No such process
478
370
raise
479
371
self.checker = None
480
481
482
def dbus_service_property(dbus_interface, signature=u"v",
483
access=u"readwrite", byte_arrays=False):
484
"""Decorators for marking methods of a DBusObjectWithProperties to
485
become properties on the D-Bus.
486
487
The decorated method will be called with no arguments by "Get"
488
and with one argument by "Set".
489
490
The parameters, where they are supported, are the same as
491
dbus.service.method, except there is only "signature", since the
492
type from Get() and the type sent to Set() is the same.
493
"""
494
# Encoding deeply encoded byte arrays is not supported yet by the
495
# "Set" method, so we fail early here:
496
if byte_arrays and signature != u"ay":
497
raise ValueError(u"Byte arrays not supported for non-'ay'"
498
u" signature %r" % signature)
499
def decorator(func):
500
func._dbus_is_property = True
501
func._dbus_interface = dbus_interface
502
func._dbus_signature = signature
503
func._dbus_access = access
504
func._dbus_name = func.__name__
505
if func._dbus_name.endswith(u"_dbus_property"):
506
func._dbus_name = func._dbus_name[:-14]
507
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
508
return func
509
return decorator
510
511
512
class DBusPropertyException(dbus.exceptions.DBusException):
513
"""A base class for D-Bus property-related exceptions
514
"""
515
def __unicode__(self):
516
return unicode(str(self))
517
518
519
class DBusPropertyAccessException(DBusPropertyException):
520
"""A property's access permissions disallows an operation.
521
"""
522
pass
523
524
525
class DBusPropertyNotFound(DBusPropertyException):
526
"""An attempt was made to access a non-existing property.
527
"""
528
pass
529
530
531
class DBusObjectWithProperties(dbus.service.Object):
532
"""A D-Bus object with properties.
533
534
Classes inheriting from this can use the dbus_service_property
535
decorator to expose methods as D-Bus properties. It exposes the
536
standard Get(), Set(), and GetAll() methods on the D-Bus.
537
"""
538
539
@staticmethod
540
def _is_dbus_property(obj):
541
return getattr(obj, u"_dbus_is_property", False)
542
543
def _get_all_dbus_properties(self):
544
"""Returns a generator of (name, attribute) pairs
545
"""
546
return ((prop._dbus_name, prop)
547
for name, prop in
548
inspect.getmembers(self, self._is_dbus_property))
549
550
def _get_dbus_property(self, interface_name, property_name):
551
"""Returns a bound method if one exists which is a D-Bus
552
property with the specified name and interface.
553
"""
554
for name in (property_name,
555
property_name + u"_dbus_property"):
556
prop = getattr(self, name, None)
557
if (prop is None
558
or not self._is_dbus_property(prop)
559
or prop._dbus_name != property_name
560
or (interface_name and prop._dbus_interface
561
and interface_name != prop._dbus_interface)):
562
continue
563
return prop
564
# No such property
565
raise DBusPropertyNotFound(self.dbus_object_path + u":"
566
+ interface_name + u"."
567
+ property_name)
568
569
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
570
out_signature=u"v")
571
def Get(self, interface_name, property_name):
572
"""Standard D-Bus property Get() method, see D-Bus standard.
573
"""
574
prop = self._get_dbus_property(interface_name, property_name)
575
if prop._dbus_access == u"write":
576
raise DBusPropertyAccessException(property_name)
577
value = prop()
578
if not hasattr(value, u"variant_level"):
579
return value
580
return type(value)(value, variant_level=value.variant_level+1)
581
582
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
583
def Set(self, interface_name, property_name, value):
584
"""Standard D-Bus property Set() method, see D-Bus standard.
585
"""
586
prop = self._get_dbus_property(interface_name, property_name)
587
if prop._dbus_access == u"read":
588
raise DBusPropertyAccessException(property_name)
589
if prop._dbus_get_args_options[u"byte_arrays"]:
590
# The byte_arrays option is not supported yet on
591
# signatures other than "ay".
592
if prop._dbus_signature != u"ay":
593
raise ValueError
594
value = dbus.ByteArray(''.join(unichr(byte)
595
for byte in value))
596
prop(value)
597
598
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
599
out_signature=u"a{sv}")
600
def GetAll(self, interface_name):
601
"""Standard D-Bus property GetAll() method, see D-Bus
602
standard.
603
604
Note: Will not include properties with access="write".
605
"""
606
all = {}
607
for name, prop in self._get_all_dbus_properties():
608
if (interface_name
609
and interface_name != prop._dbus_interface):
610
# Interface non-empty but did not match
611
continue
612
# Ignore write-only properties
613
if prop._dbus_access == u"write":
614
continue
615
value = prop()
616
if not hasattr(value, u"variant_level"):
617
all[name] = value
618
continue
619
all[name] = type(value)(value, variant_level=
620
value.variant_level+1)
621
return dbus.Dictionary(all, signature=u"sv")
622
623
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
624
out_signature=u"s",
625
path_keyword='object_path',
626
connection_keyword='connection')
627
def Introspect(self, object_path, connection):
628
"""Standard D-Bus method, overloaded to insert property tags.
629
"""
630
xmlstring = dbus.service.Object.Introspect(self, object_path,
631
connection)
632
try:
633
document = xml.dom.minidom.parseString(xmlstring)
634
def make_tag(document, name, prop):
635
e = document.createElement(u"property")
636
e.setAttribute(u"name", name)
637
e.setAttribute(u"type", prop._dbus_signature)
638
e.setAttribute(u"access", prop._dbus_access)
639
return e
640
for if_tag in document.getElementsByTagName(u"interface"):
641
for tag in (make_tag(document, name, prop)
642
for name, prop
643
in self._get_all_dbus_properties()
644
if prop._dbus_interface
645
== if_tag.getAttribute(u"name")):
646
if_tag.appendChild(tag)
647
# Add the names to the return values for the
648
# "org.freedesktop.DBus.Properties" methods
649
if (if_tag.getAttribute(u"name")
650
== u"org.freedesktop.DBus.Properties"):
651
for cn in if_tag.getElementsByTagName(u"method"):
652
if cn.getAttribute(u"name") == u"Get":
653
for arg in cn.getElementsByTagName(u"arg"):
654
if (arg.getAttribute(u"direction")
655
== u"out"):
656
arg.setAttribute(u"name", u"value")
657
elif cn.getAttribute(u"name") == u"GetAll":
658
for arg in cn.getElementsByTagName(u"arg"):
659
if (arg.getAttribute(u"direction")
660
== u"out"):
661
arg.setAttribute(u"name", u"props")
662
xmlstring = document.toxml(u"utf-8")
663
document.unlink()
664
except (AttributeError, xml.dom.DOMException,
665
xml.parsers.expat.ExpatError), error:
666
logger.error(u"Failed to override Introspection method",
667
error)
668
return xmlstring
669
670
671
class ClientDBus(Client, DBusObjectWithProperties):
672
"""A Client class using D-Bus
673
674
Attributes:
675
dbus_object_path: dbus.ObjectPath
676
bus: dbus.SystemBus()
677
"""
678
# dbus.service.Object doesn't use super(), so we can't either.
679
680
def __init__(self, bus = None, *args, **kwargs):
681
self.bus = bus
682
Client.__init__(self, *args, **kwargs)
683
# Only now, when this client is initialized, can it show up on
684
# the D-Bus
685
self.dbus_object_path = (dbus.ObjectPath
686
(u"/clients/"
687
+ self.name.replace(u".", u"_")))
688
DBusObjectWithProperties.__init__(self, self.bus,
689
self.dbus_object_path)
690
691
@staticmethod
692
def _datetime_to_dbus(dt, variant_level=0):
693
"""Convert a UTC datetime.datetime() to a D-Bus type."""
694
return dbus.String(dt.isoformat(),
695
variant_level=variant_level)
696
697
def enable(self):
698
oldstate = getattr(self, u"enabled", False)
699
r = Client.enable(self)
700
if oldstate != self.enabled:
701
# Emit D-Bus signals
702
self.PropertyChanged(dbus.String(u"enabled"),
703
dbus.Boolean(True, variant_level=1))
704
self.PropertyChanged(
705
dbus.String(u"last_enabled"),
706
self._datetime_to_dbus(self.last_enabled,
707
variant_level=1))
708
return r
709
710
def disable(self, quiet = False):
711
oldstate = getattr(self, u"enabled", False)
712
r = Client.disable(self, quiet=quiet)
713
if not quiet and oldstate != self.enabled:
714
# Emit D-Bus signal
715
self.PropertyChanged(dbus.String(u"enabled"),
716
dbus.Boolean(False, variant_level=1))
717
return r
718
719
def __del__(self, *args, **kwargs):
720
try:
721
self.remove_from_connection()
722
except LookupError:
723
pass
724
if hasattr(DBusObjectWithProperties, u"__del__"):
725
DBusObjectWithProperties.__del__(self, *args, **kwargs)
726
Client.__del__(self, *args, **kwargs)
727
728
def checker_callback(self, pid, condition, command,
729
*args, **kwargs):
730
self.checker_callback_tag = None
731
self.checker = None
732
# Emit D-Bus signal
733
self.PropertyChanged(dbus.String(u"checker_running"),
734
dbus.Boolean(False, variant_level=1))
735
if os.WIFEXITED(condition):
736
exitstatus = os.WEXITSTATUS(condition)
737
# Emit D-Bus signal
738
self.CheckerCompleted(dbus.Int16(exitstatus),
739
dbus.Int64(condition),
740
dbus.String(command))
741
else:
742
# Emit D-Bus signal
743
self.CheckerCompleted(dbus.Int16(-1),
744
dbus.Int64(condition),
745
dbus.String(command))
746
747
return Client.checker_callback(self, pid, condition, command,
748
*args, **kwargs)
749
750
def checked_ok(self, *args, **kwargs):
751
r = Client.checked_ok(self, *args, **kwargs)
752
# Emit D-Bus signal
753
self.PropertyChanged(
754
dbus.String(u"last_checked_ok"),
755
(self._datetime_to_dbus(self.last_checked_ok,
756
variant_level=1)))
757
return r
758
759
def start_checker(self, *args, **kwargs):
760
old_checker = self.checker
761
if self.checker is not None:
762
old_checker_pid = self.checker.pid
763
else:
764
old_checker_pid = None
765
r = Client.start_checker(self, *args, **kwargs)
766
# Only if new checker process was started
767
if (self.checker is not None
768
and old_checker_pid != self.checker.pid):
769
# Emit D-Bus signal
770
self.CheckerStarted(self.current_checker_command)
771
self.PropertyChanged(
772
dbus.String(u"checker_running"),
773
dbus.Boolean(True, variant_level=1))
774
return r
775
776
def stop_checker(self, *args, **kwargs):
777
old_checker = getattr(self, u"checker", None)
778
r = Client.stop_checker(self, *args, **kwargs)
779
if (old_checker is not None
780
and getattr(self, u"checker", None) is None):
781
self.PropertyChanged(dbus.String(u"checker_running"),
782
dbus.Boolean(False, variant_level=1))
783
return r
784
785
## D-Bus methods, signals & properties
786
_interface = u"se.bsnet.fukt.Mandos.Client"
787
788
## Signals
789
790
# CheckerCompleted - signal
791
@dbus.service.signal(_interface, signature=u"nxs")
792
def CheckerCompleted(self, exitcode, waitstatus, command):
793
"D-Bus signal"
794
pass
795
796
# CheckerStarted - signal
797
@dbus.service.signal(_interface, signature=u"s")
798
def CheckerStarted(self, command):
799
"D-Bus signal"
800
pass
801
802
# PropertyChanged - signal
803
@dbus.service.signal(_interface, signature=u"sv")
804
def PropertyChanged(self, property, value):
805
"D-Bus signal"
806
pass
807
808
# GotSecret - signal
809
@dbus.service.signal(_interface)
810
def GotSecret(self):
811
"D-Bus signal"
812
pass
813
814
# Rejected - signal
815
@dbus.service.signal(_interface)
816
def Rejected(self):
817
"D-Bus signal"
818
pass
819
820
## Methods
821
822
# CheckedOK - method
823
@dbus.service.method(_interface)
824
def CheckedOK(self):
825
return self.checked_ok()
826
827
# Enable - method
828
@dbus.service.method(_interface)
829
def Enable(self):
830
"D-Bus method"
831
self.enable()
832
833
# StartChecker - method
834
@dbus.service.method(_interface)
835
def StartChecker(self):
836
"D-Bus method"
837
self.start_checker()
838
839
# Disable - method
840
@dbus.service.method(_interface)
841
def Disable(self):
842
"D-Bus method"
843
self.disable()
844
845
# StopChecker - method
846
@dbus.service.method(_interface)
847
def StopChecker(self):
848
self.stop_checker()
849
850
## Properties
851
852
# name - property
853
@dbus_service_property(_interface, signature=u"s", access=u"read")
854
def name_dbus_property(self):
855
return dbus.String(self.name)
856
857
# fingerprint - property
858
@dbus_service_property(_interface, signature=u"s", access=u"read")
859
def fingerprint_dbus_property(self):
860
return dbus.String(self.fingerprint)
861
862
# host - property
863
@dbus_service_property(_interface, signature=u"s",
864
access=u"readwrite")
865
def host_dbus_property(self, value=None):
866
if value is None: # get
867
return dbus.String(self.host)
868
self.host = value
869
# Emit D-Bus signal
870
self.PropertyChanged(dbus.String(u"host"),
871
dbus.String(value, variant_level=1))
872
873
# created - property
874
@dbus_service_property(_interface, signature=u"s", access=u"read")
875
def created_dbus_property(self):
876
return dbus.String(self._datetime_to_dbus(self.created))
877
878
# last_enabled - property
879
@dbus_service_property(_interface, signature=u"s", access=u"read")
880
def last_enabled_dbus_property(self):
881
if self.last_enabled is None:
882
return dbus.String(u"")
883
return dbus.String(self._datetime_to_dbus(self.last_enabled))
884
885
# enabled - property
886
@dbus_service_property(_interface, signature=u"b",
887
access=u"readwrite")
888
def enabled_dbus_property(self, value=None):
889
if value is None: # get
890
return dbus.Boolean(self.enabled)
891
if value:
892
self.enable()
893
else:
894
self.disable()
895
896
# last_checked_ok - property
897
@dbus_service_property(_interface, signature=u"s",
898
access=u"readwrite")
899
def last_checked_ok_dbus_property(self, value=None):
900
if value is not None:
901
self.checked_ok()
902
return
372
def still_valid(self):
373
"""Has the timeout not yet passed for this client?"""
374
now = datetime.datetime.now()
903
375
if self.last_checked_ok is None:
904
return dbus.String(u"")
905
return dbus.String(self._datetime_to_dbus(self
906
.last_checked_ok))
907
908
# timeout - property
909
@dbus_service_property(_interface, signature=u"t",
910
access=u"readwrite")
911
def timeout_dbus_property(self, value=None):
912
if value is None: # get
913
return dbus.UInt64(self.timeout_milliseconds())
914
self.timeout = datetime.timedelta(0, 0, 0, value)
915
# Emit D-Bus signal
916
self.PropertyChanged(dbus.String(u"timeout"),
917
dbus.UInt64(value, variant_level=1))
918
if getattr(self, u"disable_initiator_tag", None) is None:
919
return
920
# Reschedule timeout
921
gobject.source_remove(self.disable_initiator_tag)
922
self.disable_initiator_tag = None
923
time_to_die = (self.
924
_timedelta_to_milliseconds((self
925
.last_checked_ok
926
+ self.timeout)
927
- datetime.datetime
928
.utcnow()))
929
if time_to_die <= 0:
930
# The timeout has passed
931
self.disable()
932
else:
933
self.disable_initiator_tag = (gobject.timeout_add
934
(time_to_die, self.disable))
935
936
# interval - property
937
@dbus_service_property(_interface, signature=u"t",
938
access=u"readwrite")
939
def interval_dbus_property(self, value=None):
940
if value is None: # get
941
return dbus.UInt64(self.interval_milliseconds())
942
self.interval = datetime.timedelta(0, 0, 0, value)
943
# Emit D-Bus signal
944
self.PropertyChanged(dbus.String(u"interval"),
945
dbus.UInt64(value, variant_level=1))
946
if getattr(self, u"checker_initiator_tag", None) is None:
947
return
948
# Reschedule checker run
949
gobject.source_remove(self.checker_initiator_tag)
950
self.checker_initiator_tag = (gobject.timeout_add
951
(value, self.start_checker))
952
self.start_checker() # Start one now, too
953
954
# checker - property
955
@dbus_service_property(_interface, signature=u"s",
956
access=u"readwrite")
957
def checker_dbus_property(self, value=None):
958
if value is None: # get
959
return dbus.String(self.checker_command)
960
self.checker_command = value
961
# Emit D-Bus signal
962
self.PropertyChanged(dbus.String(u"checker"),
963
dbus.String(self.checker_command,
964
variant_level=1))
965
966
# checker_running - property
967
@dbus_service_property(_interface, signature=u"b",
968
access=u"readwrite")
969
def checker_running_dbus_property(self, value=None):
970
if value is None: # get
971
return dbus.Boolean(self.checker is not None)
972
if value:
973
self.start_checker()
974
else:
975
self.stop_checker()
976
977
# object_path - property
978
@dbus_service_property(_interface, signature=u"o", access=u"read")
979
def object_path_dbus_property(self):
980
return self.dbus_object_path # is already a dbus.ObjectPath
981
982
# secret = property
983
@dbus_service_property(_interface, signature=u"ay",
984
access=u"write", byte_arrays=True)
985
def secret_dbus_property(self, value):
986
self.secret = str(value)
987
988
del _interface
989
990
991
class ClientHandler(socketserver.BaseRequestHandler, object):
992
"""A class to handle client connections.
993
994
Instantiated once for each connection to handle it.
376
return now < (self.created + self.timeout)
377
else:
378
return now < (self.last_checked_ok + self.timeout)
379
380
381
def peer_certificate(session):
382
"Return the peer's OpenPGP certificate as a bytestring"
383
# If not an OpenPGP certificate...
384
if gnutls.library.functions.gnutls_certificate_type_get\
385
(session._c_object) \
386
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
387
# ...do the normal thing
388
return session.peer_certificate
389
list_size = ctypes.c_uint()
390
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
391
(session._c_object, ctypes.byref(list_size))
392
if list_size.value == 0:
393
return None
394
cert = cert_list[0]
395
return ctypes.string_at(cert.data, cert.size)
396
397
398
def fingerprint(openpgp):
399
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
400
# New GnuTLS "datum" with the OpenPGP public key
401
datum = gnutls.library.types.gnutls_datum_t\
402
(ctypes.cast(ctypes.c_char_p(openpgp),
403
ctypes.POINTER(ctypes.c_ubyte)),
404
ctypes.c_uint(len(openpgp)))
405
# New empty GnuTLS certificate
406
crt = gnutls.library.types.gnutls_openpgp_crt_t()
407
gnutls.library.functions.gnutls_openpgp_crt_init\
408
(ctypes.byref(crt))
409
# Import the OpenPGP public key into the certificate
410
gnutls.library.functions.gnutls_openpgp_crt_import\
411
(crt, ctypes.byref(datum),
412
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
413
# Verify the self signature in the key
414
crtverify = ctypes.c_uint();
415
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
416
(crt, ctypes.c_uint(0), ctypes.byref(crtverify))
417
if crtverify != 0:
418
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
419
raise gnutls.errors.CertificateSecurityError("Verify failed")
420
# New buffer for the fingerprint
421
buffer = ctypes.create_string_buffer(20)
422
buffer_length = ctypes.c_size_t()
423
# Get the fingerprint from the certificate into the buffer
424
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
425
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
426
# Deinit the certificate
427
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
428
# Convert the buffer to a Python bytestring
429
fpr = ctypes.string_at(buffer, buffer_length.value)
430
# Convert the bytestring to hexadecimal notation
431
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
432
return hex_fpr
433
434
435
class tcp_handler(SocketServer.BaseRequestHandler, object):
436
"""A TCP request handler class.
437
Instantiated by IPv6_TCPServer for each request to handle it.
995
438
Note: This will run in its own forked process."""
996
439
997
440
def handle(self):
998
441
logger.info(u"TCP connection from: %s",
999
unicode(self.client_address))
1000
logger.debug(u"IPC Pipe FD: %d",
1001
self.server.child_pipe[1].fileno())
1002
# Open IPC pipe to parent process
1003
with contextlib.nested(self.server.child_pipe[1],
1004
self.server.parent_pipe[0]
1005
) as (ipc, ipc_return):
1006
session = (gnutls.connection
1007
.ClientSession(self.request,
1008
gnutls.connection
1009
.X509Credentials()))
1010
1011
# Note: gnutls.connection.X509Credentials is really a
1012
# generic GnuTLS certificate credentials object so long as
1013
# no X.509 keys are added to it. Therefore, we can use it
1014
# here despite using OpenPGP certificates.
1015
1016
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1017
# u"+AES-256-CBC", u"+SHA1",
1018
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1019
# u"+DHE-DSS"))
1020
# Use a fallback default, since this MUST be set.
1021
priority = self.server.gnutls_priority
1022
if priority is None:
1023
priority = u"NORMAL"
1024
(gnutls.library.functions
1025
.gnutls_priority_set_direct(session._c_object,
1026
priority, None))
1027
1028
# Start communication using the Mandos protocol
1029
# Get protocol number
1030
line = self.request.makefile().readline()
1031
logger.debug(u"Protocol version: %r", line)
1032
try:
1033
if int(line.strip().split()[0]) > 1:
1034
raise RuntimeError
1035
except (ValueError, IndexError, RuntimeError), error:
1036
logger.error(u"Unknown protocol version: %s", error)
1037
return
1038
1039
# Start GnuTLS connection
1040
try:
1041
session.handshake()
1042
except gnutls.errors.GNUTLSError, error:
1043
logger.warning(u"Handshake failed: %s", error)
1044
# Do not run session.bye() here: the session is not
1045
# established. Just abandon the request.
1046
return
1047
logger.debug(u"Handshake succeeded")
1048
try:
1049
try:
1050
fpr = self.fingerprint(self.peer_certificate
1051
(session))
1052
except (TypeError, gnutls.errors.GNUTLSError), error:
1053
logger.warning(u"Bad certificate: %s", error)
1054
return
1055
logger.debug(u"Fingerprint: %s", fpr)
1056
1057
for c in self.server.clients:
1058
if c.fingerprint == fpr:
1059
client = c
1060
break
1061
else:
1062
ipc.write(u"NOTFOUND %s %s\n"
1063
% (fpr, unicode(self.client_address)))
1064
return
1065
1066
class ClientProxy(object):
1067
"""Client proxy object. Not for calling methods."""
1068
def __init__(self, client):
1069
self.client = client
1070
def __getattr__(self, name):
1071
if name.startswith("ipc_"):
1072
def tempfunc():
1073
ipc.write("%s %s\n" % (name[4:].upper(),
1074
self.client.name))
1075
return tempfunc
1076
if not hasattr(self.client, name):
1077
raise AttributeError
1078
ipc.write(u"GETATTR %s %s\n"
1079
% (name, self.client.fingerprint))
1080
return pickle.load(ipc_return)
1081
clientproxy = ClientProxy(client)
1082
# Have to check if client.enabled, since it is
1083
# possible that the client was disabled since the
1084
# GnuTLS session was established.
1085
if not clientproxy.enabled:
1086
clientproxy.ipc_disabled()
1087
return
1088
1089
clientproxy.ipc_sending()
1090
sent_size = 0
1091
while sent_size < len(client.secret):
1092
sent = session.send(client.secret[sent_size:])
1093
logger.debug(u"Sent: %d, remaining: %d",
1094
sent, len(client.secret)
1095
- (sent_size + sent))
1096
sent_size += sent
1097
finally:
1098
session.bye()
1099
1100
@staticmethod
1101
def peer_certificate(session):
1102
"Return the peer's OpenPGP certificate as a bytestring"
1103
# If not an OpenPGP certificate...
1104
if (gnutls.library.functions
1105
.gnutls_certificate_type_get(session._c_object)
1106
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1107
# ...do the normal thing
1108
return session.peer_certificate
1109
list_size = ctypes.c_uint(1)
1110
cert_list = (gnutls.library.functions
1111
.gnutls_certificate_get_peers
1112
(session._c_object, ctypes.byref(list_size)))
1113
if not bool(cert_list) and list_size.value != 0:
1114
raise gnutls.errors.GNUTLSError(u"error getting peer"
1115
u" certificate")
1116
if list_size.value == 0:
1117
return None
1118
cert = cert_list[0]
1119
return ctypes.string_at(cert.data, cert.size)
1120
1121
@staticmethod
1122
def fingerprint(openpgp):
1123
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1124
# New GnuTLS "datum" with the OpenPGP public key
1125
datum = (gnutls.library.types
1126
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1127
ctypes.POINTER
1128
(ctypes.c_ubyte)),
1129
ctypes.c_uint(len(openpgp))))
1130
# New empty GnuTLS certificate
1131
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1132
(gnutls.library.functions
1133
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1134
# Import the OpenPGP public key into the certificate
1135
(gnutls.library.functions
1136
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1137
gnutls.library.constants
1138
.GNUTLS_OPENPGP_FMT_RAW))
1139
# Verify the self signature in the key
1140
crtverify = ctypes.c_uint()
1141
(gnutls.library.functions
1142
.gnutls_openpgp_crt_verify_self(crt, 0,
1143
ctypes.byref(crtverify)))
1144
if crtverify.value != 0:
1145
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1146
raise (gnutls.errors.CertificateSecurityError
1147
(u"Verify failed"))
1148
# New buffer for the fingerprint
1149
buf = ctypes.create_string_buffer(20)
1150
buf_len = ctypes.c_size_t()
1151
# Get the fingerprint from the certificate into the buffer
1152
(gnutls.library.functions
1153
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1154
ctypes.byref(buf_len)))
1155
# Deinit the certificate
1156
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1157
# Convert the buffer to a Python bytestring
1158
fpr = ctypes.string_at(buf, buf_len.value)
1159
# Convert the bytestring to hexadecimal notation
1160
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1161
return hex_fpr
1162
1163
1164
class ForkingMixInWithPipes(socketserver.ForkingMixIn, object):
1165
"""Like socketserver.ForkingMixIn, but also pass a pipe pair."""
1166
def process_request(self, request, client_address):
1167
"""Overrides and wraps the original process_request().
1168
1169
This function creates a new pipe in self.pipe
1170
"""
1171
# Child writes to child_pipe
1172
self.child_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))
1173
# Parent writes to parent_pipe
1174
self.parent_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))
1175
super(ForkingMixInWithPipes,
1176
self).process_request(request, client_address)
1177
# Close unused ends for parent
1178
self.parent_pipe[0].close() # close read end
1179
self.child_pipe[1].close() # close write end
1180
self.add_pipe_fds(self.child_pipe[0], self.parent_pipe[1])
1181
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1182
"""Dummy function; override as necessary"""
1183
child_pipe_fd.close()
1184
parent_pipe_fd.close()
1185
1186
1187
class IPv6_TCPServer(ForkingMixInWithPipes,
1188
socketserver.TCPServer, object):
1189
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1190
442
unicode(self.client_address))
443
session = gnutls.connection.ClientSession\
444
(self.request, gnutls.connection.X509Credentials())
445
446
line = self.request.makefile().readline()
447
logger.debug(u"Protocol version: %r", line)
448
try:
449
if int(line.strip().split()[0]) > 1:
450
raise RuntimeError
451
except (ValueError, IndexError, RuntimeError), error:
452
logger.error(u"Unknown protocol version: %s", error)
453
return
454
455
# Note: gnutls.connection.X509Credentials is really a generic
456
# GnuTLS certificate credentials object so long as no X.509
457
# keys are added to it. Therefore, we can use it here despite
458
# using OpenPGP certificates.
459
460
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
461
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
462
# "+DHE-DSS"))
463
priority = "NORMAL" # Fallback default, since this
464
# MUST be set.
465
if self.server.settings["priority"]:
466
priority = self.server.settings["priority"]
467
gnutls.library.functions.gnutls_priority_set_direct\
468
(session._c_object, priority, None);
469
470
try:
471
session.handshake()
472
except gnutls.errors.GNUTLSError, error:
473
logger.warning(u"Handshake failed: %s", error)
474
# Do not run session.bye() here: the session is not
475
# established. Just abandon the request.
476
return
477
try:
478
fpr = fingerprint(peer_certificate(session))
479
except (TypeError, gnutls.errors.GNUTLSError), error:
480
logger.warning(u"Bad certificate: %s", error)
481
session.bye()
482
return
483
logger.debug(u"Fingerprint: %s", fpr)
484
client = None
485
for c in self.server.clients:
486
if c.fingerprint == fpr:
487
client = c
488
break
489
if not client:
490
logger.warning(u"Client not found for fingerprint: %s",
491
fpr)
492
session.bye()
493
return
494
# Have to check if client.still_valid(), since it is possible
495
# that the client timed out while establishing the GnuTLS
496
# session.
497
if not client.still_valid():
498
logger.warning(u"Client %(name)s is invalid",
499
vars(client))
500
session.bye()
501
return
502
sent_size = 0
503
while sent_size < len(client.secret):
504
sent = session.send(client.secret[sent_size:])
505
logger.debug(u"Sent: %d, remaining: %d",
506
sent, len(client.secret)
507
- (sent_size + sent))
508
sent_size += sent
509
session.bye()
510
511
512
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
513
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1191
514
Attributes:
1192
enabled: Boolean; whether this server is activated yet
1193
interface: None or a network interface name (string)
1194
use_ipv6: Boolean; to use IPv6 or not
515
settings: Server settings
516
clients: Set() of Client objects
1195
517
"""
1196
def __init__(self, server_address, RequestHandlerClass,
1197
interface=None, use_ipv6=True):
1198
self.interface = interface
1199
if use_ipv6:
1200
self.address_family = socket.AF_INET6
1201
socketserver.TCPServer.__init__(self, server_address,
1202
RequestHandlerClass)
518
address_family = socket.AF_INET6
519
def __init__(self, *args, **kwargs):
520
if "settings" in kwargs:
521
self.settings = kwargs["settings"]
522
del kwargs["settings"]
523
if "clients" in kwargs:
524
self.clients = kwargs["clients"]
525
del kwargs["clients"]
526
return super(type(self), self).__init__(*args, **kwargs)
1203
527
def server_bind(self):
1204
528
"""This overrides the normal server_bind() function
1205
529
to bind to an interface if one was specified, and also NOT to
1206
530
bind to an address or port if they were not specified."""
1207
if self.interface is not None:
1208
if SO_BINDTODEVICE is None:
1209
logger.error(u"SO_BINDTODEVICE does not exist;"
1210
u" cannot bind to interface %s",
1211
self.interface)
1212
else:
1213
try:
1214
self.socket.setsockopt(socket.SOL_SOCKET,
1215
SO_BINDTODEVICE,
1216
str(self.interface
1217
+ u'\0'))
1218
except socket.error, error:
1219
if error[0] == errno.EPERM:
1220
logger.error(u"No permission to"
1221
u" bind to interface %s",
1222
self.interface)
1223
elif error[0] == errno.ENOPROTOOPT:
1224
logger.error(u"SO_BINDTODEVICE not available;"
1225
u" cannot bind to interface %s",
1226
self.interface)
1227
else:
1228
raise
531
if self.settings["interface"]:
532
# 25 is from /usr/include/asm-i486/socket.h
533
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
534
try:
535
self.socket.setsockopt(socket.SOL_SOCKET,
536
SO_BINDTODEVICE,
537
self.settings["interface"])
538
except socket.error, error:
539
if error[0] == errno.EPERM:
540
logger.error(u"No permission to"
541
u" bind to interface %s",
542
self.settings["interface"])
543
else:
544
raise error
1229
545
# Only bind(2) the socket if we really need to.
1230
546
if self.server_address[0] or self.server_address[1]:
1231
547
if not self.server_address[0]:
1232
if self.address_family == socket.AF_INET6:
1233
any_address = u"::" # in6addr_any
1234
else:
1235
any_address = socket.INADDR_ANY
1236
self.server_address = (any_address,
548
in6addr_any = "::"
549
self.server_address = (in6addr_any,
1237
550
self.server_address[1])
1238
551
elif not self.server_address[1]:
1239
552
self.server_address = (self.server_address[0],
1240
553
0)
1241
# if self.interface:
554
# if self.settings["interface"]:
1242
555
# self.server_address = (self.server_address[0],
1243
556
# 0, # port
1244
557
# 0, # flowinfo
1245
558
# if_nametoindex
1246
# (self.interface))
1247
return socketserver.TCPServer.server_bind(self)
1248
1249
1250
class MandosServer(IPv6_TCPServer):
1251
"""Mandos server.
1252
1253
Attributes:
1254
clients: set of Client objects
1255
gnutls_priority GnuTLS priority string
1256
use_dbus: Boolean; to emit D-Bus signals or not
1257
1258
Assumes a gobject.MainLoop event loop.
1259
"""
1260
def __init__(self, server_address, RequestHandlerClass,
1261
interface=None, use_ipv6=True, clients=None,
1262
gnutls_priority=None, use_dbus=True):
1263
self.enabled = False
1264
self.clients = clients
1265
if self.clients is None:
1266
self.clients = set()
1267
self.use_dbus = use_dbus
1268
self.gnutls_priority = gnutls_priority
1269
IPv6_TCPServer.__init__(self, server_address,
1270
RequestHandlerClass,
1271
interface = interface,
1272
use_ipv6 = use_ipv6)
1273
def server_activate(self):
1274
if self.enabled:
1275
return socketserver.TCPServer.server_activate(self)
1276
def enable(self):
1277
self.enabled = True
1278
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1279
# Call "handle_ipc" for both data and EOF events
1280
gobject.io_add_watch(child_pipe_fd.fileno(),
1281
gobject.IO_IN | gobject.IO_HUP,
1282
functools.partial(self.handle_ipc,
1283
reply = parent_pipe_fd,
1284
sender= child_pipe_fd))
1285
def handle_ipc(self, source, condition, reply=None, sender=None):
1286
condition_names = {
1287
gobject.IO_IN: u"IN", # There is data to read.
1288
gobject.IO_OUT: u"OUT", # Data can be written (without
1289
# blocking).
1290
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1291
gobject.IO_ERR: u"ERR", # Error condition.
1292
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1293
# broken, usually for pipes and
1294
# sockets).
1295
}
1296
conditions_string = ' | '.join(name
1297
for cond, name in
1298
condition_names.iteritems()
1299
if cond & condition)
1300
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1301
conditions_string)
1302
1303
# Read a line from the file object
1304
cmdline = sender.readline()
1305
if not cmdline: # Empty line means end of file
1306
# close the IPC pipes
1307
sender.close()
1308
reply.close()
1309
1310
# Stop calling this function
1311
return False
1312
1313
logger.debug(u"IPC command: %r", cmdline)
1314
1315
# Parse and act on command
1316
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1317
1318
if cmd == u"NOTFOUND":
1319
fpr, address = args.split(None, 1)
1320
logger.warning(u"Client not found for fingerprint: %s, ad"
1321
u"dress: %s", fpr, address)
1322
if self.use_dbus:
1323
# Emit D-Bus signal
1324
mandos_dbus_service.ClientNotFound(fpr, address)
1325
elif cmd == u"DISABLED":
1326
for client in self.clients:
1327
if client.name == args:
1328
logger.warning(u"Client %s is disabled", args)
1329
if self.use_dbus:
1330
# Emit D-Bus signal
1331
client.Rejected()
1332
break
1333
else:
1334
logger.error(u"Unknown client %s is disabled", args)
1335
elif cmd == u"SENDING":
1336
for client in self.clients:
1337
if client.name == args:
1338
logger.info(u"Sending secret to %s", client.name)
1339
client.checked_ok()
1340
if self.use_dbus:
1341
# Emit D-Bus signal
1342
client.GotSecret()
1343
break
1344
else:
1345
logger.error(u"Sending secret to unknown client %s",
1346
args)
1347
elif cmd == u"GETATTR":
1348
attr_name, fpr = args.split(None, 1)
1349
for client in self.clients:
1350
if client.fingerprint == fpr:
1351
attr_value = getattr(client, attr_name, None)
1352
logger.debug("IPC reply: %r", attr_value)
1353
pickle.dump(attr_value, reply)
1354
break
1355
else:
1356
logger.error(u"Client %s on address %s requesting "
1357
u"attribute %s not found", fpr, address,
1358
attr_name)
1359
pickle.dump(None, reply)
1360
else:
1361
logger.error(u"Unknown IPC command: %r", cmdline)
1362
1363
# Keep calling this function
1364
return True
559
# (self.settings
560
# ["interface"]))
561
return super(type(self), self).server_bind()
1365
562
1366
563
1367
564
def string_to_delta(interval):
1368
565
"""Parse a string and return a datetime.timedelta
1369
1370
>>> string_to_delta(u'7d')
566
567
>>> string_to_delta('7d')
1371
568
datetime.timedelta(7)
1372
>>> string_to_delta(u'60s')
569
>>> string_to_delta('60s')
1373
570
datetime.timedelta(0, 60)
1374
>>> string_to_delta(u'60m')
571
>>> string_to_delta('60m')
1375
572
datetime.timedelta(0, 3600)
1376
>>> string_to_delta(u'24h')
573
>>> string_to_delta('24h')
1377
574
datetime.timedelta(1)
1378
575
>>> string_to_delta(u'1w')
1379
576
datetime.timedelta(7)
1380
>>> string_to_delta(u'5m 30s')
577
>>> string_to_delta('5m 30s')
1381
578
datetime.timedelta(0, 330)
1382
579
"""
1383
580
timevalue = datetime.timedelta(0)
1384
581
for s in interval.split():
1385
582
try:
1386
suffix = unicode(s[-1])
1387
value = int(s[:-1])
583
suffix=unicode(s[-1])
584
value=int(s[:-1])
1388
585
if suffix == u"d":
1389
586
delta = datetime.timedelta(value)
1390
587
elif suffix == u"s":
1396
593
elif suffix == u"w":
1397
594
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1398
595
else:
1399
raise ValueError(u"Unknown suffix %r" % suffix)
1400
except (ValueError, IndexError), e:
1401
raise ValueError(e.message)
596
raise ValueError
597
except (ValueError, IndexError):
598
raise ValueError
1402
599
timevalue += delta
1403
600
return timevalue
1404
601
1405
602
603
def server_state_changed(state):
604
"""Derived from the Avahi example code"""
605
if state == avahi.SERVER_COLLISION:
606
logger.error(u"Server name collision")
607
service.remove()
608
elif state == avahi.SERVER_RUNNING:
609
service.add()
610
611
612
def entry_group_state_changed(state, error):
613
"""Derived from the Avahi example code"""
614
logger.debug(u"state change: %i", state)
615
616
if state == avahi.ENTRY_GROUP_ESTABLISHED:
617
logger.debug(u"Service established.")
618
elif state == avahi.ENTRY_GROUP_COLLISION:
619
logger.warning(u"Service name collision.")
620
service.rename()
621
elif state == avahi.ENTRY_GROUP_FAILURE:
622
logger.critical(u"Error in group state changed %s",
623
unicode(error))
624
raise AvahiGroupError("State changed: %s", str(error))
625
1406
626
def if_nametoindex(interface):
1407
"""Call the C function if_nametoindex(), or equivalent
1408
1409
Note: This function cannot accept a unicode string."""
627
"""Call the C function if_nametoindex(), or equivalent"""
1410
628
global if_nametoindex
1411
629
try:
1412
if_nametoindex = (ctypes.cdll.LoadLibrary
1413
(ctypes.util.find_library(u"c"))
1414
.if_nametoindex)
630
if "ctypes.util" not in sys.modules:
631
import ctypes.util
632
if_nametoindex = ctypes.cdll.LoadLibrary\
633
(ctypes.util.find_library("c")).if_nametoindex
1415
634
except (OSError, AttributeError):
1416
logger.warning(u"Doing if_nametoindex the hard way")
635
if "struct" not in sys.modules:
636
import struct
637
if "fcntl" not in sys.modules:
638
import fcntl
1417
639
def if_nametoindex(interface):
1418
640
"Get an interface index the hard way, i.e. using fcntl()"
1419
641
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1420
with contextlib.closing(socket.socket()) as s:
1421
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1422
struct.pack(str(u"16s16x"),
1423
interface))
1424
interface_index = struct.unpack(str(u"I"),
1425
ifreq[16:20])[0]
642
s = socket.socket()
643
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
644
struct.pack("16s16x", interface))
645
s.close()
646
interface_index = struct.unpack("I", ifreq[16:20])[0]
1426
647
return interface_index
1427
648
return if_nametoindex(interface)
1428
649
1429
650
1430
651
def daemon(nochdir = False, noclose = False):
1431
652
"""See daemon(3). Standard BSD Unix function.
1432
1433
653
This should really exist as os.daemon, but it doesn't (yet)."""
1434
654
if os.fork():
1435
655
sys.exit()
1436
656
os.setsid()
1437
657
if not nochdir:
1438
os.chdir(u"/")
658
os.chdir("/")
1439
659
if os.fork():
1440
660
sys.exit()
1441
661
if not noclose:
1443
663
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1444
664
if not stat.S_ISCHR(os.fstat(null).st_mode):
1445
665
raise OSError(errno.ENODEV,
1446
u"%s not a character device"
1447
% os.path.devnull)
666
"/dev/null not a character device")
1448
667
os.dup2(null, sys.stdin.fileno())
1449
668
os.dup2(null, sys.stdout.fileno())
1450
669
os.dup2(null, sys.stderr.fileno())
1453
672
1454
673
1455
674
def main():
1456
1457
##################################################################
1458
# Parsing of options, both command line and config file
1459
1460
parser = optparse.OptionParser(version = "%%prog %s" % version)
1461
parser.add_option("-i", u"--interface", type=u"string",
1462
metavar="IF", help=u"Bind to interface IF")
1463
parser.add_option("-a", u"--address", type=u"string",
1464
help=u"Address to listen for requests on")
1465
parser.add_option("-p", u"--port", type=u"int",
1466
help=u"Port number to receive requests on")
1467
parser.add_option("--check", action=u"store_true",
1468
help=u"Run self-test")
1469
parser.add_option("--debug", action=u"store_true",
1470
help=u"Debug mode; run in foreground and log to"
1471
u" terminal")
1472
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1473
u" priority string (see GnuTLS documentation)")
1474
parser.add_option("--servicename", type=u"string",
1475
metavar=u"NAME", help=u"Zeroconf service name")
1476
parser.add_option("--configdir", type=u"string",
1477
default=u"/etc/mandos", metavar=u"DIR",
1478
help=u"Directory to search for configuration"
1479
u" files")
1480
parser.add_option("--no-dbus", action=u"store_false",
1481
dest=u"use_dbus", help=u"Do not provide D-Bus"
1482
u" system bus interface")
1483
parser.add_option("--no-ipv6", action=u"store_false",
1484
dest=u"use_ipv6", help=u"Do not use IPv6")
1485
options = parser.parse_args()[0]
675
global main_loop_started
676
main_loop_started = False
677
678
parser = OptionParser(version = "%%prog %s" % version)
679
parser.add_option("-i", "--interface", type="string",
680
metavar="IF", help="Bind to interface IF")
681
parser.add_option("-a", "--address", type="string",
682
help="Address to listen for requests on")
683
parser.add_option("-p", "--port", type="int",
684
help="Port number to receive requests on")
685
parser.add_option("--check", action="store_true", default=False,
686
help="Run self-test")
687
parser.add_option("--debug", action="store_true",
688
help="Debug mode; run in foreground and log to"
689
" terminal")
690
parser.add_option("--priority", type="string", help="GnuTLS"
691
" priority string (see GnuTLS documentation)")
692
parser.add_option("--servicename", type="string", metavar="NAME",
693
help="Zeroconf service name")
694
parser.add_option("--configdir", type="string",
695
default="/etc/mandos", metavar="DIR",
696
help="Directory to search for configuration"
697
" files")
698
(options, args) = parser.parse_args()
1486
699
1487
700
if options.check:
1488
701
import doctest
1490
703
sys.exit()
1491
704
1492
705
# Default values for config file for server-global settings
1493
server_defaults = { u"interface": u"",
1494
u"address": u"",
1495
u"port": u"",
1496
u"debug": u"False",
1497
u"priority":
1498
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1499
u"servicename": u"Mandos",
1500
u"use_dbus": u"True",
1501
u"use_ipv6": u"True",
706
server_defaults = { "interface": "",
707
"address": "",
708
"port": "",
709
"debug": "False",
710
"priority":
711
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
712
"servicename": "Mandos",
1502
713
}
1503
714
1504
715
# Parse config file for server-global settings
1505
server_config = configparser.SafeConfigParser(server_defaults)
716
server_config = ConfigParser.SafeConfigParser(server_defaults)
1506
717
del server_defaults
1507
server_config.read(os.path.join(options.configdir,
1508
u"mandos.conf"))
718
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1509
719
# Convert the SafeConfigParser object to a dict
1510
720
server_settings = server_config.defaults()
1511
# Use the appropriate methods on the non-string config options
1512
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1513
server_settings[option] = server_config.getboolean(u"DEFAULT",
1514
option)
1515
if server_settings["port"]:
1516
server_settings["port"] = server_config.getint(u"DEFAULT",
1517
u"port")
721
# Use getboolean on the boolean config option
722
server_settings["debug"] = server_config.getboolean\
723
("DEFAULT", "debug")
1518
724
del server_config
1519
725
1520
726
# Override the settings from the config file with command line
1521
727
# options, if set.
1522
for option in (u"interface", u"address", u"port", u"debug",
1523
u"priority", u"servicename", u"configdir",
1524
u"use_dbus", u"use_ipv6"):
728
for option in ("interface", "address", "port", "debug",
729
"priority", "servicename", "configdir"):
1525
730
value = getattr(options, option)
1526
731
if value is not None:
1527
732
server_settings[option] = value
1528
733
del options
1529
# Force all strings to be unicode
1530
for option in server_settings.keys():
1531
if type(server_settings[option]) is str:
1532
server_settings[option] = unicode(server_settings[option])
1533
734
# Now we have our good server settings in "server_settings"
1534
735
1535
##################################################################
1536
1537
# For convenience
1538
debug = server_settings[u"debug"]
1539
use_dbus = server_settings[u"use_dbus"]
1540
use_ipv6 = server_settings[u"use_ipv6"]
736
debug = server_settings["debug"]
1541
737
1542
738
if not debug:
1543
739
syslogger.setLevel(logging.WARNING)
1544
740
console.setLevel(logging.WARNING)
1545
741
1546
if server_settings[u"servicename"] != u"Mandos":
1547
syslogger.setFormatter(logging.Formatter
1548
(u'Mandos (%s) [%%(process)d]:'
1549
u' %%(levelname)s: %%(message)s'
1550
% server_settings[u"servicename"]))
742
if server_settings["servicename"] != "Mandos":
743
syslogger.setFormatter(logging.Formatter\
744
('Mandos (%s): %%(levelname)s:'
745
' %%(message)s'
746
% server_settings["servicename"]))
1551
747
1552
748
# Parse config file with clients
1553
client_defaults = { u"timeout": u"1h",
1554
u"interval": u"5m",
1555
u"checker": u"fping -q -- %%(host)s",
1556
u"host": u"",
749
client_defaults = { "timeout": "1h",
750
"interval": "5m",
751
"checker": "fping -q -- %(host)s",
752
"host": "",
1557
753
}
1558
client_config = configparser.SafeConfigParser(client_defaults)
1559
client_config.read(os.path.join(server_settings[u"configdir"],
1560
u"clients.conf"))
1561
1562
global mandos_dbus_service
1563
mandos_dbus_service = None
1564
1565
tcp_server = MandosServer((server_settings[u"address"],
1566
server_settings[u"port"]),
1567
ClientHandler,
1568
interface=(server_settings[u"interface"]
1569
or None),
1570
use_ipv6=use_ipv6,
1571
gnutls_priority=
1572
server_settings[u"priority"],
1573
use_dbus=use_dbus)
1574
pidfilename = u"/var/run/mandos.pid"
1575
try:
1576
pidfile = open(pidfilename, u"w")
1577
except IOError:
1578
logger.error(u"Could not open file %r", pidfilename)
1579
1580
try:
1581
uid = pwd.getpwnam(u"_mandos").pw_uid
1582
gid = pwd.getpwnam(u"_mandos").pw_gid
1583
except KeyError:
1584
try:
1585
uid = pwd.getpwnam(u"mandos").pw_uid
1586
gid = pwd.getpwnam(u"mandos").pw_gid
1587
except KeyError:
1588
try:
1589
uid = pwd.getpwnam(u"nobody").pw_uid
1590
gid = pwd.getpwnam(u"nobody").pw_gid
1591
except KeyError:
1592
uid = 65534
1593
gid = 65534
1594
try:
1595
os.setgid(gid)
1596
os.setuid(uid)
1597
except OSError, error:
1598
if error[0] != errno.EPERM:
1599
raise error
1600
1601
# Enable all possible GnuTLS debugging
1602
if debug:
1603
# "Use a log level over 10 to enable all debugging options."
1604
# - GnuTLS manual
1605
gnutls.library.functions.gnutls_global_set_log_level(11)
1606
1607
@gnutls.library.types.gnutls_log_func
1608
def debug_gnutls(level, string):
1609
logger.debug(u"GnuTLS: %s", string[:-1])
1610
1611
(gnutls.library.functions
1612
.gnutls_global_set_log_function(debug_gnutls))
754
client_config = ConfigParser.SafeConfigParser(client_defaults)
755
client_config.read(os.path.join(server_settings["configdir"],
756
"clients.conf"))
757
758
global service
759
service = AvahiService(name = server_settings["servicename"],
760
type = "_mandos._tcp", );
761
if server_settings["interface"]:
762
service.interface = if_nametoindex(server_settings["interface"])
1613
763
1614
764
global main_loop
765
global bus
766
global server
1615
767
# From the Avahi example code
1616
768
DBusGMainLoop(set_as_default=True )
1617
769
main_loop = gobject.MainLoop()
1618
770
bus = dbus.SystemBus()
771
server = dbus.Interface(
772
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
773
avahi.DBUS_INTERFACE_SERVER )
1619
774
# End of Avahi example code
1620
if use_dbus:
1621
try:
1622
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1623
bus, do_not_queue=True)
1624
except dbus.exceptions.NameExistsException, e:
1625
logger.error(unicode(e) + u", disabling D-Bus")
1626
use_dbus = False
1627
server_settings[u"use_dbus"] = False
1628
tcp_server.use_dbus = False
1629
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1630
service = AvahiService(name = server_settings[u"servicename"],
1631
servicetype = u"_mandos._tcp",
1632
protocol = protocol, bus = bus)
1633
if server_settings["interface"]:
1634
service.interface = (if_nametoindex
1635
(str(server_settings[u"interface"])))
1636
1637
client_class = Client
1638
if use_dbus:
1639
client_class = functools.partial(ClientDBus, bus = bus)
1640
tcp_server.clients.update(set(
1641
client_class(name = section,
1642
config= dict(client_config.items(section)))
1643
for section in client_config.sections()))
1644
if not tcp_server.clients:
1645
logger.warning(u"No clients defined")
775
776
clients = Set()
777
def remove_from_clients(client):
778
clients.remove(client)
779
if not clients:
780
logger.critical(u"No clients left, exiting")
781
sys.exit()
782
783
clients.update(Set(Client(name = section,
784
stop_hook = remove_from_clients,
785
config
786
= dict(client_config.items(section)))
787
for section in client_config.sections()))
788
if not clients:
789
logger.critical(u"No clients defined")
790
sys.exit(1)
1646
791
1647
792
if debug:
1648
793
# Redirect stdin so all checkers get /dev/null
1656
801
# Close all input and output, do double fork, etc.
1657
802
daemon()
1658
803
804
pidfilename = "/var/run/mandos/mandos.pid"
805
pid = os.getpid()
1659
806
try:
1660
with pidfile:
1661
pid = os.getpid()
1662
pidfile.write(str(pid) + "\n")
807
pidfile = open(pidfilename, "w")
808
pidfile.write(str(pid) + "\n")
809
pidfile.close()
1663
810
del pidfile
1664
except IOError:
1665
logger.error(u"Could not write to file %r with PID %d",
1666
pidfilename, pid)
1667
except NameError:
1668
# "pidfile" was never created
1669
pass
1670
del pidfilename
811
except IOError, err:
812
logger.error(u"Could not write %s file with PID %d",
813
pidfilename, os.getpid())
814
815
def cleanup():
816
"Cleanup function; run on exit"
817
global group
818
# From the Avahi example code
819
if not group is None:
820
group.Free()
821
group = None
822
# End of Avahi example code
823
824
while clients:
825
client = clients.pop()
826
client.stop_hook = None
827
client.stop()
828
829
atexit.register(cleanup)
1671
830
1672
831
if not debug:
1673
832
signal.signal(signal.SIGINT, signal.SIG_IGN)
1674
833
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1675
834
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1676
835
1677
if use_dbus:
1678
class MandosDBusService(dbus.service.Object):
1679
"""A D-Bus proxy object"""
1680
def __init__(self):
1681
dbus.service.Object.__init__(self, bus, u"/")
1682
_interface = u"se.bsnet.fukt.Mandos"
1683
1684
@dbus.service.signal(_interface, signature=u"o")
1685
def ClientAdded(self, objpath):
1686
"D-Bus signal"
1687
pass
1688
1689
@dbus.service.signal(_interface, signature=u"ss")
1690
def ClientNotFound(self, fingerprint, address):
1691
"D-Bus signal"
1692
pass
1693
1694
@dbus.service.signal(_interface, signature=u"os")
1695
def ClientRemoved(self, objpath, name):
1696
"D-Bus signal"
1697
pass
1698
1699
@dbus.service.method(_interface, out_signature=u"ao")
1700
def GetAllClients(self):
1701
"D-Bus method"
1702
return dbus.Array(c.dbus_object_path
1703
for c in tcp_server.clients)
1704
1705
@dbus.service.method(_interface,
1706
out_signature=u"a{oa{sv}}")
1707
def GetAllClientsWithProperties(self):
1708
"D-Bus method"
1709
return dbus.Dictionary(
1710
((c.dbus_object_path, c.GetAll(u""))
1711
for c in tcp_server.clients),
1712
signature=u"oa{sv}")
1713
1714
@dbus.service.method(_interface, in_signature=u"o")
1715
def RemoveClient(self, object_path):
1716
"D-Bus method"
1717
for c in tcp_server.clients:
1718
if c.dbus_object_path == object_path:
1719
tcp_server.clients.remove(c)
1720
c.remove_from_connection()
1721
# Don't signal anything except ClientRemoved
1722
c.disable(quiet=True)
1723
# Emit D-Bus signal
1724
self.ClientRemoved(object_path, c.name)
1725
return
1726
raise KeyError(object_path)
1727
1728
del _interface
1729
1730
mandos_dbus_service = MandosDBusService()
1731
1732
def cleanup():
1733
"Cleanup function; run on exit"
1734
service.cleanup()
1735
1736
while tcp_server.clients:
1737
client = tcp_server.clients.pop()
1738
if use_dbus:
1739
client.remove_from_connection()
1740
client.disable_hook = None
1741
# Don't signal anything except ClientRemoved
1742
client.disable(quiet=True)
1743
if use_dbus:
1744
# Emit D-Bus signal
1745
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1746
client.name)
1747
1748
atexit.register(cleanup)
1749
1750
for client in tcp_server.clients:
1751
if use_dbus:
1752
# Emit D-Bus signal
1753
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1754
client.enable()
1755
1756
tcp_server.enable()
1757
tcp_server.server_activate()
1758
836
for client in clients:
837
client.start()
838
839
tcp_server = IPv6_TCPServer((server_settings["address"],
840
server_settings["port"]),
841
tcp_handler,
842
settings=server_settings,
843
clients=clients)
1759
844
# Find out what port we got
1760
845
service.port = tcp_server.socket.getsockname()[1]
1761
if use_ipv6:
1762
logger.info(u"Now listening on address %r, port %d,"
1763
" flowinfo %d, scope_id %d"
1764
% tcp_server.socket.getsockname())
1765
else: # IPv4
1766
logger.info(u"Now listening on address %r, port %d"
1767
% tcp_server.socket.getsockname())
846
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
847
u" scope_id %d" % tcp_server.socket.getsockname())
1768
848
1769
849
#service.interface = tcp_server.socket.getsockname()[3]
1770
850
1771
851
try:
1772
852
# From the Avahi example code
853
server.connect_to_signal("StateChanged", server_state_changed)
1773
854
try:
1774
service.activate()
855
server_state_changed(server.GetState())
1775
856
except dbus.exceptions.DBusException, error:
1776
857
logger.critical(u"DBusException: %s", error)
1777
cleanup()
1778
858
sys.exit(1)
1779
859
# End of Avahi example code
1780
860
1781
861
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1782
862
lambda *args, **kwargs:
1783
(tcp_server.handle_request
1784
(*args[2:], **kwargs) or True))
863
tcp_server.handle_request\
864
(*args[2:], **kwargs) or True)
1785
865
1786
866
logger.debug(u"Starting main loop")
867
main_loop_started = True
1787
868
main_loop.run()
1788
869
except AvahiError, error:
1789
logger.critical(u"AvahiError: %s", error)
1790
cleanup()
870
logger.critical(u"AvahiError: %s" + unicode(error))
1791
871
sys.exit(1)
1792
872
except KeyboardInterrupt:
1793
873
if debug:
1794
print >> sys.stderr
1795
logger.debug(u"Server received KeyboardInterrupt")
1796
logger.debug(u"Server exiting")
1797
# Must run before the D-Bus bus name gets deregistered
1798
cleanup()
874
print
1799
875
1800
876
if __name__ == '__main__':
1801
877
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0