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- Committer: Teddy Hogeborn
- Date: 2011-02-27 17:26:35 UTC
- Revision ID: teddy@fukt.bsnet.se-20110227172635-hw1sire7k3vuo1co
Update copyright year to "2011" wherever appropriate.
- files removed:
- debian/mandos-client.examples
- debian/upstream
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python2.7
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#!/usr/bin/python
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# -*- mode: python; coding: utf-8 -*-
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#
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# Mandos server - give out binary blobs to connecting clients.
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# "AvahiService" class, and some lines in "main".
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#
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# Everything else is
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# Copyright © 2008-2014 Teddy Hogeborn
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# Copyright © 2008-2014 Björn Påhlsson
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# Copyright © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 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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# it under the terms of the GNU General Public License as published by
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# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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#
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# Contact the authors at <mandos@recompile.se>.
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# Contact the authors at <mandos@fukt.bsnet.se>.
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#
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from __future__ import (division, absolute_import, print_function,
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unicode_literals)
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from future_builtins import *
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import SocketServer as socketserver
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import socket
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import argparse
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import optparse
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import datetime
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import errno
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import gnutls.crypto
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import functools
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import cPickle as pickle
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import multiprocessing
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import types
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import binascii
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import tempfile
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import itertools
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import collections
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65
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import dbus
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import dbus.service
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except ImportError:
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SO_BINDTODEVICE = None
90
83
91
if sys.version_info.major == 2:
92
str = unicode
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version = "1.6.8"
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stored_state_file = "clients.pickle"
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logger = logging.getLogger()
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syslogger = None
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100
try:
101
if_nametoindex = (ctypes.cdll.LoadLibrary
102
(ctypes.util.find_library("c"))
103
.if_nametoindex)
104
except (OSError, AttributeError):
105
def if_nametoindex(interface):
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"Get an interface index the hard way, i.e. using fcntl()"
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SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
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with contextlib.closing(socket.socket()) as s:
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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
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struct.pack(b"16s16x", interface))
111
interface_index = struct.unpack("I", ifreq[16:20])[0]
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return interface_index
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114
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def initlogger(debug, level=logging.WARNING):
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"""init logger and add loglevel"""
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global syslogger
119
syslogger = (logging.handlers.SysLogHandler
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(facility =
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logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log"))
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syslogger.setFormatter(logging.Formatter
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('Mandos [%(process)d]: %(levelname)s:'
125
' %(message)s'))
126
logger.addHandler(syslogger)
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128
if debug:
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
131
' [%(process)d]:'
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' %(levelname)s:'
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' %(message)s'))
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logger.addHandler(console)
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logger.setLevel(level)
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137
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class PGPError(Exception):
139
"""Exception if encryption/decryption fails"""
140
pass
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142
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class PGPEngine(object):
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"""A simple class for OpenPGP symmetric encryption & decryption"""
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def __init__(self):
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self.tempdir = tempfile.mkdtemp(prefix="mandos-")
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self.gnupgargs = ['--batch',
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'--home', self.tempdir,
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'--force-mdc',
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'--quiet',
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'--no-use-agent']
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def __enter__(self):
154
return self
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def __exit__(self, exc_type, exc_value, traceback):
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self._cleanup()
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return False
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160
def __del__(self):
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self._cleanup()
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def _cleanup(self):
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if self.tempdir is not None:
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# Delete contents of tempdir
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for root, dirs, files in os.walk(self.tempdir,
167
topdown = False):
168
for filename in files:
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os.remove(os.path.join(root, filename))
170
for dirname in dirs:
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os.rmdir(os.path.join(root, dirname))
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# Remove tempdir
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os.rmdir(self.tempdir)
174
self.tempdir = None
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def password_encode(self, password):
177
# Passphrase can not be empty and can not contain newlines or
178
# NUL bytes. So we prefix it and hex encode it.
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encoded = b"mandos" + binascii.hexlify(password)
180
if len(encoded) > 2048:
181
# GnuPG can't handle long passwords, so encode differently
182
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
183
.replace(b"\n", b"\\n")
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.replace(b"\0", b"\\x00"))
185
return encoded
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187
def encrypt(self, data, password):
188
passphrase = self.password_encode(password)
189
with tempfile.NamedTemporaryFile(dir=self.tempdir
190
) as passfile:
191
passfile.write(passphrase)
192
passfile.flush()
193
proc = subprocess.Popen(['gpg', '--symmetric',
194
'--passphrase-file',
195
passfile.name]
196
+ self.gnupgargs,
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stdin = subprocess.PIPE,
198
stdout = subprocess.PIPE,
199
stderr = subprocess.PIPE)
200
ciphertext, err = proc.communicate(input = data)
201
if proc.returncode != 0:
202
raise PGPError(err)
203
return ciphertext
204
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def decrypt(self, data, password):
206
passphrase = self.password_encode(password)
207
with tempfile.NamedTemporaryFile(dir = self.tempdir
208
) as passfile:
209
passfile.write(passphrase)
210
passfile.flush()
211
proc = subprocess.Popen(['gpg', '--decrypt',
212
'--passphrase-file',
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passfile.name]
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+ self.gnupgargs,
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stdin = subprocess.PIPE,
216
stdout = subprocess.PIPE,
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stderr = subprocess.PIPE)
218
decrypted_plaintext, err = proc.communicate(input
219
= data)
220
if proc.returncode != 0:
221
raise PGPError(err)
222
return decrypted_plaintext
223
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version = "1.2.3"
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#logger = logging.getLogger('mandos')
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logger = logging.Logger('mandos')
89
syslogger = (logging.handlers.SysLogHandler
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
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('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
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logger.addHandler(syslogger)
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
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102
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103
class AvahiError(Exception):
226
104
def __init__(self, value, *args, **kwargs):
227
105
self.value = value
228
return super(AvahiError, self).__init__(value, *args,
229
**kwargs)
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
230
109
231
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class AvahiServiceError(AvahiError):
232
111
pass
243
122
Used to optionally bind to the specified interface.
244
123
name: string; Example: 'Mandos'
245
124
type: string; Example: '_mandos._tcp'.
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See <https://www.iana.org/assignments/service-names-port-numbers>
125
See <http://www.dns-sd.org/ServiceTypes.html>
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port: integer; what port to announce
248
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TXT: list of strings; TXT record for the service
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domain: string; Domain to publish on, default to .local if empty.
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server: D-Bus Server
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bus: dbus.SystemBus()
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"""
258
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def __init__(self, interface = avahi.IF_UNSPEC, name = None,
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servicetype = None, port = None, TXT = None,
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domain = "", host = "", max_renames = 32768,
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self.group = None # our entry group
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self.server = None
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self.bus = bus
276
self.entry_group_state_changed_match = None
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def rename(self):
279
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"""Derived from the Avahi example code"""
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if self.rename_count >= self.max_renames:
282
158
" after %i retries, exiting.",
283
159
self.rename_count)
284
160
raise AvahiServiceError("Too many renames")
285
self.name = str(self.server
286
.GetAlternativeServiceName(self.name))
161
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
287
162
logger.info("Changing Zeroconf service name to %r ...",
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163
self.name)
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syslogger.setFormatter(logging.Formatter
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('Mandos (%s) [%%(process)d]:'
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' %%(levelname)s: %%(message)s'
167
% self.name))
289
168
self.remove()
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169
try:
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self.add()
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except dbus.exceptions.DBusException as error:
293
logger.critical("D-Bus Exception", exc_info=error)
171
except dbus.exceptions.DBusException, error:
172
logger.critical("DBusException: %s", error)
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173
self.cleanup()
295
174
os._exit(1)
296
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self.rename_count += 1
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def remove(self):
299
177
"""Derived from the Avahi example code"""
300
if self.entry_group_state_changed_match is not None:
301
self.entry_group_state_changed_match.remove()
302
self.entry_group_state_changed_match = None
303
178
if self.group is not None:
304
179
self.group.Reset()
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def add(self):
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"""Derived from the Avahi example code"""
308
self.remove()
309
182
if self.group is None:
310
183
self.group = dbus.Interface(
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184
self.bus.get_object(avahi.DBUS_NAME,
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185
self.server.EntryGroupNew()),
313
186
avahi.DBUS_INTERFACE_ENTRY_GROUP)
314
self.entry_group_state_changed_match = (
315
self.group.connect_to_signal(
316
'StateChanged', self.entry_group_state_changed))
187
self.group.connect_to_signal('StateChanged',
188
self
189
.entry_group_state_changed)
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190
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
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191
self.name, self.type)
319
192
self.group.AddService(
325
198
dbus.UInt16(self.port),
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199
avahi.string_array_to_txt_array(self.TXT))
327
200
self.group.Commit()
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329
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def entry_group_state_changed(self, state, error):
330
202
"""Derived from the Avahi example code"""
331
203
logger.debug("Avahi entry group state change: %i", state)
337
209
self.rename()
338
210
elif state == avahi.ENTRY_GROUP_FAILURE:
339
211
logger.critical("Avahi: Error in group state changed %s",
340
str(error))
341
raise AvahiGroupError("State changed: {!s}"
342
.format(error))
343
212
unicode(error))
213
raise AvahiGroupError("State changed: %s"
214
% unicode(error))
344
215
def cleanup(self):
345
216
"""Derived from the Avahi example code"""
346
217
if self.group is not None:
347
try:
348
self.group.Free()
349
except (dbus.exceptions.UnknownMethodException,
350
dbus.exceptions.DBusException):
351
pass
218
self.group.Free()
352
219
self.group = None
353
self.remove()
354
355
def server_state_changed(self, state, error=None):
220
def server_state_changed(self, state):
356
221
"""Derived from the Avahi example code"""
357
222
logger.debug("Avahi server state change: %i", state)
358
bad_states = { avahi.SERVER_INVALID:
359
"Zeroconf server invalid",
360
avahi.SERVER_REGISTERING: None,
361
avahi.SERVER_COLLISION:
362
"Zeroconf server name collision",
363
avahi.SERVER_FAILURE:
364
"Zeroconf server failure" }
365
if state in bad_states:
366
if bad_states[state] is not None:
367
if error is None:
368
logger.error(bad_states[state])
369
else:
370
logger.error(bad_states[state] + ": %r", error)
371
self.cleanup()
223
if state == avahi.SERVER_COLLISION:
224
logger.error("Zeroconf server name collision")
225
self.remove()
372
226
elif state == avahi.SERVER_RUNNING:
373
227
self.add()
374
else:
375
if error is None:
376
logger.debug("Unknown state: %r", state)
377
else:
378
logger.debug("Unknown state: %r: %r", state, error)
379
380
228
def activate(self):
381
229
"""Derived from the Avahi example code"""
382
230
if self.server is None:
383
231
self.server = dbus.Interface(
384
232
self.bus.get_object(avahi.DBUS_NAME,
385
avahi.DBUS_PATH_SERVER,
386
follow_name_owner_changes=True),
233
avahi.DBUS_PATH_SERVER),
387
234
avahi.DBUS_INTERFACE_SERVER)
388
235
self.server.connect_to_signal("StateChanged",
389
236
self.server_state_changed)
390
237
self.server_state_changed(self.server.GetState())
391
238
392
239
393
class AvahiServiceToSyslog(AvahiService):
394
def rename(self):
395
"""Add the new name to the syslog messages"""
396
ret = AvahiService.rename(self)
397
syslogger.setFormatter(logging.Formatter
398
('Mandos ({}) [%(process)d]:'
399
' %(levelname)s: %(message)s'
400
.format(self.name)))
401
return ret
402
403
404
240
class Client(object):
405
241
"""A representation of a client host served by this server.
406
242
407
243
Attributes:
408
approved: bool(); 'None' if not yet approved/disapproved
244
_approved: bool(); 'None' if not yet approved/disapproved
409
245
approval_delay: datetime.timedelta(); Time to wait for approval
410
246
approval_duration: datetime.timedelta(); Duration of one approval
411
247
checker: subprocess.Popen(); a running checker process used
418
254
instance %(name)s can be used in the command.
419
255
checker_initiator_tag: a gobject event source tag, or None
420
256
created: datetime.datetime(); (UTC) object creation
421
client_structure: Object describing what attributes a client has
422
and is used for storing the client at exit
423
257
current_checker_command: string; current running checker_command
258
disable_hook: If set, called by disable() as disable_hook(self)
424
259
disable_initiator_tag: a gobject event source tag, or None
425
260
enabled: bool()
426
261
fingerprint: string (40 or 32 hexadecimal digits); used to
429
264
interval: datetime.timedelta(); How often to start a new checker
430
265
last_approval_request: datetime.datetime(); (UTC) or None
431
266
last_checked_ok: datetime.datetime(); (UTC) or None
432
last_checker_status: integer between 0 and 255 reflecting exit
433
status of last checker. -1 reflects crashed
434
checker, -2 means no checker completed yet.
435
last_enabled: datetime.datetime(); (UTC) or None
267
last_enabled: datetime.datetime(); (UTC)
436
268
name: string; from the config file, used in log messages and
437
269
D-Bus identifiers
438
270
secret: bytestring; sent verbatim (over TLS) to client
439
271
timeout: datetime.timedelta(); How long from last_checked_ok
440
272
until this client is disabled
441
extended_timeout: extra long timeout when secret has been sent
442
273
runtime_expansions: Allowed attributes for runtime expansion.
443
expires: datetime.datetime(); time (UTC) when a client will be
444
disabled, or None
445
server_settings: The server_settings dict from main()
446
274
"""
447
275
448
276
runtime_expansions = ("approval_delay", "approval_duration",
449
"created", "enabled", "expires",
450
"fingerprint", "host", "interval",
451
"last_approval_request", "last_checked_ok",
277
"created", "enabled", "fingerprint",
278
"host", "interval", "last_checked_ok",
452
279
"last_enabled", "name", "timeout")
453
client_defaults = { "timeout": "PT5M",
454
"extended_timeout": "PT15M",
455
"interval": "PT2M",
456
"checker": "fping -q -- %%(host)s",
457
"host": "",
458
"approval_delay": "PT0S",
459
"approval_duration": "PT1S",
460
"approved_by_default": "True",
461
"enabled": "True",
462
}
463
280
464
281
@staticmethod
465
def config_parser(config):
466
"""Construct a new dict of client settings of this form:
467
{ client_name: {setting_name: value, ...}, ...}
468
with exceptions for any special settings as defined above.
469
NOTE: Must be a pure function. Must return the same result
470
value given the same arguments.
471
"""
472
settings = {}
473
for client_name in config.sections():
474
section = dict(config.items(client_name))
475
client = settings[client_name] = {}
476
477
client["host"] = section["host"]
478
# Reformat values from string types to Python types
479
client["approved_by_default"] = config.getboolean(
480
client_name, "approved_by_default")
481
client["enabled"] = config.getboolean(client_name,
482
"enabled")
483
484
client["fingerprint"] = (section["fingerprint"].upper()
485
.replace(" ", ""))
486
if "secret" in section:
487
client["secret"] = section["secret"].decode("base64")
488
elif "secfile" in section:
489
with open(os.path.expanduser(os.path.expandvars
490
(section["secfile"])),
491
"rb") as secfile:
492
client["secret"] = secfile.read()
493
else:
494
raise TypeError("No secret or secfile for section {}"
495
.format(section))
496
client["timeout"] = string_to_delta(section["timeout"])
497
client["extended_timeout"] = string_to_delta(
498
section["extended_timeout"])
499
client["interval"] = string_to_delta(section["interval"])
500
client["approval_delay"] = string_to_delta(
501
section["approval_delay"])
502
client["approval_duration"] = string_to_delta(
503
section["approval_duration"])
504
client["checker_command"] = section["checker"]
505
client["last_approval_request"] = None
506
client["last_checked_ok"] = None
507
client["last_checker_status"] = -2
508
509
return settings
510
511
def __init__(self, settings, name = None, server_settings=None):
282
def _timedelta_to_milliseconds(td):
283
"Convert a datetime.timedelta() to milliseconds"
284
return ((td.days * 24 * 60 * 60 * 1000)
285
+ (td.seconds * 1000)
286
+ (td.microseconds // 1000))
287
288
def timeout_milliseconds(self):
289
"Return the 'timeout' attribute in milliseconds"
290
return self._timedelta_to_milliseconds(self.timeout)
291
292
def interval_milliseconds(self):
293
"Return the 'interval' attribute in milliseconds"
294
return self._timedelta_to_milliseconds(self.interval)
295
296
def approval_delay_milliseconds(self):
297
return self._timedelta_to_milliseconds(self.approval_delay)
298
299
def __init__(self, name = None, disable_hook=None, config=None):
300
"""Note: the 'checker' key in 'config' sets the
301
'checker_command' attribute and *not* the 'checker'
302
attribute."""
512
303
self.name = name
513
if server_settings is None:
514
server_settings = {}
515
self.server_settings = server_settings
516
# adding all client settings
517
for setting, value in settings.items():
518
setattr(self, setting, value)
519
520
if self.enabled:
521
if not hasattr(self, "last_enabled"):
522
self.last_enabled = datetime.datetime.utcnow()
523
if not hasattr(self, "expires"):
524
self.expires = (datetime.datetime.utcnow()
525
+ self.timeout)
526
else:
527
self.last_enabled = None
528
self.expires = None
529
304
if config is None:
305
config = {}
530
306
logger.debug("Creating client %r", self.name)
531
307
# Uppercase and remove spaces from fingerprint for later
532
308
# comparison purposes with return value from the fingerprint()
533
309
# function
310
self.fingerprint = (config["fingerprint"].upper()
311
.replace(" ", ""))
534
312
logger.debug(" Fingerprint: %s", self.fingerprint)
535
self.created = settings.get("created",
536
datetime.datetime.utcnow())
537
538
# attributes specific for this server instance
313
if "secret" in config:
314
self.secret = config["secret"].decode("base64")
315
elif "secfile" in config:
316
with open(os.path.expanduser(os.path.expandvars
317
(config["secfile"])),
318
"rb") as secfile:
319
self.secret = secfile.read()
320
else:
321
raise TypeError("No secret or secfile for client %s"
322
% self.name)
323
self.host = config.get("host", "")
324
self.created = datetime.datetime.utcnow()
325
self.enabled = False
326
self.last_approval_request = None
327
self.last_enabled = None
328
self.last_checked_ok = None
329
self.timeout = string_to_delta(config["timeout"])
330
self.interval = string_to_delta(config["interval"])
331
self.disable_hook = disable_hook
539
332
self.checker = None
540
333
self.checker_initiator_tag = None
541
334
self.disable_initiator_tag = None
542
335
self.checker_callback_tag = None
336
self.checker_command = config["checker"]
543
337
self.current_checker_command = None
544
self.approved = None
338
self.last_connect = None
339
self._approved = None
340
self.approved_by_default = config.get("approved_by_default",
341
True)
545
342
self.approvals_pending = 0
546
self.changedstate = (multiprocessing_manager
547
.Condition(multiprocessing_manager
548
.Lock()))
549
self.client_structure = [attr for attr in
550
self.__dict__.iterkeys()
551
if not attr.startswith("_")]
552
self.client_structure.append("client_structure")
553
554
for name, t in inspect.getmembers(type(self),
555
lambda obj:
556
isinstance(obj,
557
property)):
558
if not name.startswith("_"):
559
self.client_structure.append(name)
343
self.approval_delay = string_to_delta(
344
config["approval_delay"])
345
self.approval_duration = string_to_delta(
346
config["approval_duration"])
347
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
560
348
561
# Send notice to process children that client state has changed
562
349
def send_changedstate(self):
563
with self.changedstate:
564
self.changedstate.notify_all()
565
350
self.changedstate.acquire()
351
self.changedstate.notify_all()
352
self.changedstate.release()
353
566
354
def enable(self):
567
355
"""Start this client's checker and timeout hooks"""
568
356
if getattr(self, "enabled", False):
569
357
# Already enabled
570
358
return
571
self.expires = datetime.datetime.utcnow() + self.timeout
572
self.enabled = True
359
self.send_changedstate()
573
360
self.last_enabled = datetime.datetime.utcnow()
574
self.init_checker()
575
self.send_changedstate()
361
# Schedule a new checker to be started an 'interval' from now,
362
# and every interval from then on.
363
self.checker_initiator_tag = (gobject.timeout_add
364
(self.interval_milliseconds(),
365
self.start_checker))
366
# Schedule a disable() when 'timeout' has passed
367
self.disable_initiator_tag = (gobject.timeout_add
368
(self.timeout_milliseconds(),
369
self.disable))
370
self.enabled = True
371
# Also start a new checker *right now*.
372
self.start_checker()
576
373
577
374
def disable(self, quiet=True):
578
375
"""Disable this client."""
579
376
if not getattr(self, "enabled", False):
580
377
return False
581
378
if not quiet:
379
self.send_changedstate()
380
if not quiet:
582
381
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", None) is not None:
382
if getattr(self, "disable_initiator_tag", False):
584
383
gobject.source_remove(self.disable_initiator_tag)
585
384
self.disable_initiator_tag = None
586
self.expires = None
587
if getattr(self, "checker_initiator_tag", None) is not None:
385
if getattr(self, "checker_initiator_tag", False):
588
386
gobject.source_remove(self.checker_initiator_tag)
589
387
self.checker_initiator_tag = None
590
388
self.stop_checker()
389
if self.disable_hook:
390
self.disable_hook(self)
591
391
self.enabled = False
592
if not quiet:
593
self.send_changedstate()
594
392
# Do not run this again if called by a gobject.timeout_add
595
393
return False
596
394
597
395
def __del__(self):
396
self.disable_hook = None
598
397
self.disable()
599
398
600
def init_checker(self):
601
# Schedule a new checker to be started an 'interval' from now,
602
# and every interval from then on.
603
if self.checker_initiator_tag is not None:
604
gobject.source_remove(self.checker_initiator_tag)
605
self.checker_initiator_tag = (gobject.timeout_add
606
(int(self.interval
607
.total_seconds() * 1000),
608
self.start_checker))
609
# Schedule a disable() when 'timeout' has passed
610
if self.disable_initiator_tag is not None:
611
gobject.source_remove(self.disable_initiator_tag)
612
self.disable_initiator_tag = (gobject.timeout_add
613
(int(self.timeout
614
.total_seconds() * 1000),
615
self.disable))
616
# Also start a new checker *right now*.
617
self.start_checker()
618
619
399
def checker_callback(self, pid, condition, command):
620
400
"""The checker has completed, so take appropriate actions."""
621
401
self.checker_callback_tag = None
622
402
self.checker = None
623
403
if os.WIFEXITED(condition):
624
self.last_checker_status = os.WEXITSTATUS(condition)
625
if self.last_checker_status == 0:
404
exitstatus = os.WEXITSTATUS(condition)
405
if exitstatus == 0:
626
406
logger.info("Checker for %(name)s succeeded",
627
407
vars(self))
628
408
self.checked_ok()
630
410
logger.info("Checker for %(name)s failed",
631
411
vars(self))
632
412
else:
633
self.last_checker_status = -1
634
413
logger.warning("Checker for %(name)s crashed?",
635
414
vars(self))
636
415
637
416
def checked_ok(self):
638
"""Assert that the client has been seen, alive and well."""
417
"""Bump up the timeout for this client.
418
419
This should only be called when the client has been seen,
420
alive and well.
421
"""
639
422
self.last_checked_ok = datetime.datetime.utcnow()
640
self.last_checker_status = 0
641
self.bump_timeout()
642
643
def bump_timeout(self, timeout=None):
644
"""Bump up the timeout for this client."""
645
if timeout is None:
646
timeout = self.timeout
647
if self.disable_initiator_tag is not None:
648
gobject.source_remove(self.disable_initiator_tag)
649
self.disable_initiator_tag = None
650
if getattr(self, "enabled", False):
651
self.disable_initiator_tag = (gobject.timeout_add
652
(int(timeout.total_seconds()
653
* 1000), self.disable))
654
self.expires = datetime.datetime.utcnow() + timeout
423
gobject.source_remove(self.disable_initiator_tag)
424
self.disable_initiator_tag = (gobject.timeout_add
425
(self.timeout_milliseconds(),
426
self.disable))
655
427
656
428
def need_approval(self):
657
429
self.last_approval_request = datetime.datetime.utcnow()
662
434
If a checker already exists, leave it running and do
663
435
nothing."""
664
436
# The reason for not killing a running checker is that if we
665
# did that, and if a checker (for some reason) started running
666
# slowly and taking more than 'interval' time, then the client
667
# would inevitably timeout, since no checker would get a
668
# chance to run to completion. If we instead leave running
437
# did that, then if a checker (for some reason) started
438
# running slowly and taking more than 'interval' time, the
439
# client would inevitably timeout, since no checker would get
440
# a chance to run to completion. If we instead leave running
669
441
# checkers alone, the checker would have to take more time
670
442
# than 'timeout' for the client to be disabled, which is as it
671
443
# should be.
673
445
# If a checker exists, make sure it is not a zombie
674
446
try:
675
447
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
676
except AttributeError:
677
pass
678
except OSError as error:
679
if error.errno != errno.ECHILD:
680
raise
448
except (AttributeError, OSError), error:
449
if (isinstance(error, OSError)
450
and error.errno != errno.ECHILD):
451
raise error
681
452
else:
682
453
if pid:
683
454
logger.warning("Checker was a zombie")
686
457
self.current_checker_command)
687
458
# Start a new checker if needed
688
459
if self.checker is None:
689
# Escape attributes for the shell
690
escaped_attrs = { attr:
691
re.escape(str(getattr(self, attr)))
692
for attr in self.runtime_expansions }
693
460
try:
694
command = self.checker_command % escaped_attrs
695
except TypeError as error:
696
logger.error('Could not format string "%s"',
697
self.checker_command, exc_info=error)
698
return True # Try again later
461
# In case checker_command has exactly one % operator
462
command = self.checker_command % self.host
463
except TypeError:
464
# Escape attributes for the shell
465
escaped_attrs = dict(
466
(attr,
467
re.escape(unicode(str(getattr(self, attr, "")),
468
errors=
469
'replace')))
470
for attr in
471
self.runtime_expansions)
472
473
try:
474
command = self.checker_command % escaped_attrs
475
except TypeError, error:
476
logger.error('Could not format string "%s":'
477
' %s', self.checker_command, error)
478
return True # Try again later
699
479
self.current_checker_command = command
700
480
try:
701
481
logger.info("Starting checker %r for %s",
704
484
# in normal mode, that is already done by daemon(),
705
485
# and in debug mode we don't want to. (Stdin is
706
486
# always replaced by /dev/null.)
707
# The exception is when not debugging but nevertheless
708
# running in the foreground; use the previously
709
# created wnull.
710
popen_args = {}
711
if (not self.server_settings["debug"]
712
and self.server_settings["foreground"]):
713
popen_args.update({"stdout": wnull,
714
"stderr": wnull })
715
487
self.checker = subprocess.Popen(command,
716
488
close_fds=True,
717
shell=True, cwd="/",
718
**popen_args)
719
except OSError as error:
720
logger.error("Failed to start subprocess",
721
exc_info=error)
722
return True
723
self.checker_callback_tag = (gobject.child_watch_add
724
(self.checker.pid,
725
self.checker_callback,
726
data=command))
727
# The checker may have completed before the gobject
728
# watch was added. Check for this.
729
try:
489
shell=True, cwd="/")
490
self.checker_callback_tag = (gobject.child_watch_add
491
(self.checker.pid,
492
self.checker_callback,
493
data=command))
494
# The checker may have completed before the gobject
495
# watch was added. Check for this.
730
496
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
731
except OSError as error:
732
if error.errno == errno.ECHILD:
733
# This should never happen
734
logger.error("Child process vanished",
735
exc_info=error)
736
return True
737
raise
738
if pid:
739
gobject.source_remove(self.checker_callback_tag)
740
self.checker_callback(pid, status, command)
497
if pid:
498
gobject.source_remove(self.checker_callback_tag)
499
self.checker_callback(pid, status, command)
500
except OSError, error:
501
logger.error("Failed to start subprocess: %s",
502
error)
741
503
# Re-run this periodically if run by gobject.timeout_add
742
504
return True
743
505
750
512
return
751
513
logger.debug("Stopping checker for %(name)s", vars(self))
752
514
try:
753
self.checker.terminate()
515
os.kill(self.checker.pid, signal.SIGTERM)
754
516
#time.sleep(0.5)
755
517
#if self.checker.poll() is None:
756
# self.checker.kill()
757
except OSError as error:
518
# os.kill(self.checker.pid, signal.SIGKILL)
519
except OSError, error:
758
520
if error.errno != errno.ESRCH: # No such process
759
521
raise
760
522
self.checker = None
761
523
762
763
524
def dbus_service_property(dbus_interface, signature="v",
764
525
access="readwrite", byte_arrays=False):
765
526
"""Decorators for marking methods of a DBusObjectWithProperties to
776
537
# "Set" method, so we fail early here:
777
538
if byte_arrays and signature != "ay":
778
539
raise ValueError("Byte arrays not supported for non-'ay'"
779
" signature {!r}".format(signature))
540
" signature %r" % signature)
780
541
def decorator(func):
781
542
func._dbus_is_property = True
782
543
func._dbus_interface = dbus_interface
790
551
return decorator
791
552
792
553
793
def dbus_interface_annotations(dbus_interface):
794
"""Decorator for marking functions returning interface annotations
795
796
Usage:
797
798
@dbus_interface_annotations("org.example.Interface")
799
def _foo(self): # Function name does not matter
800
return {"org.freedesktop.DBus.Deprecated": "true",
801
"org.freedesktop.DBus.Property.EmitsChangedSignal":
802
"false"}
803
"""
804
def decorator(func):
805
func._dbus_is_interface = True
806
func._dbus_interface = dbus_interface
807
func._dbus_name = dbus_interface
808
return func
809
return decorator
810
811
812
def dbus_annotations(annotations):
813
"""Decorator to annotate D-Bus methods, signals or properties
814
Usage:
815
816
@dbus_service_property("org.example.Interface", signature="b",
817
access="r")
818
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
819
"org.freedesktop.DBus.Property."
820
"EmitsChangedSignal": "false"})
821
def Property_dbus_property(self):
822
return dbus.Boolean(False)
823
"""
824
def decorator(func):
825
func._dbus_annotations = annotations
826
return func
827
return decorator
828
829
830
554
class DBusPropertyException(dbus.exceptions.DBusException):
831
555
"""A base class for D-Bus property-related exceptions
832
556
"""
833
pass
557
def __unicode__(self):
558
return unicode(str(self))
559
834
560
835
561
class DBusPropertyAccessException(DBusPropertyException):
836
562
"""A property's access permissions disallows an operation.
846
572
847
573
class DBusObjectWithProperties(dbus.service.Object):
848
574
"""A D-Bus object with properties.
849
575
850
576
Classes inheriting from this can use the dbus_service_property
851
577
decorator to expose methods as D-Bus properties. It exposes the
852
578
standard Get(), Set(), and GetAll() methods on the D-Bus.
853
579
"""
854
580
855
581
@staticmethod
856
def _is_dbus_thing(thing):
857
"""Returns a function testing if an attribute is a D-Bus thing
858
859
If called like _is_dbus_thing("method") it returns a function
860
suitable for use as predicate to inspect.getmembers().
861
"""
862
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
863
False)
582
def _is_dbus_property(obj):
583
return getattr(obj, "_dbus_is_property", False)
864
584
865
def _get_all_dbus_things(self, thing):
585
def _get_all_dbus_properties(self):
866
586
"""Returns a generator of (name, attribute) pairs
867
587
"""
868
return ((getattr(athing.__get__(self), "_dbus_name",
869
name),
870
athing.__get__(self))
871
for cls in self.__class__.__mro__
872
for name, athing in
873
inspect.getmembers(cls,
874
self._is_dbus_thing(thing)))
588
return ((prop._dbus_name, prop)
589
for name, prop in
590
inspect.getmembers(self, self._is_dbus_property))
875
591
876
592
def _get_dbus_property(self, interface_name, property_name):
877
593
"""Returns a bound method if one exists which is a D-Bus
878
594
property with the specified name and interface.
879
595
"""
880
for cls in self.__class__.__mro__:
881
for name, value in (inspect.getmembers
882
(cls,
883
self._is_dbus_thing("property"))):
884
if (value._dbus_name == property_name
885
and value._dbus_interface == interface_name):
886
return value.__get__(self)
887
596
for name in (property_name,
597
property_name + "_dbus_property"):
598
prop = getattr(self, name, None)
599
if (prop is None
600
or not self._is_dbus_property(prop)
601
or prop._dbus_name != property_name
602
or (interface_name and prop._dbus_interface
603
and interface_name != prop._dbus_interface)):
604
continue
605
return prop
888
606
# No such property
889
607
raise DBusPropertyNotFound(self.dbus_object_path + ":"
890
608
+ interface_name + "."
914
632
# The byte_arrays option is not supported yet on
915
633
# signatures other than "ay".
916
634
if prop._dbus_signature != "ay":
917
raise ValueError("Byte arrays not supported for non-"
918
"'ay' signature {!r}"
919
.format(prop._dbus_signature))
920
value = dbus.ByteArray(b''.join(chr(byte)
921
for byte in value))
635
raise ValueError
636
value = dbus.ByteArray(''.join(unichr(byte)
637
for byte in value))
922
638
prop(value)
923
639
924
640
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
926
642
def GetAll(self, interface_name):
927
643
"""Standard D-Bus property GetAll() method, see D-Bus
928
644
standard.
929
645
930
646
Note: Will not include properties with access="write".
931
647
"""
932
properties = {}
933
for name, prop in self._get_all_dbus_things("property"):
648
all = {}
649
for name, prop in self._get_all_dbus_properties():
934
650
if (interface_name
935
651
and interface_name != prop._dbus_interface):
936
652
# Interface non-empty but did not match
940
656
continue
941
657
value = prop()
942
658
if not hasattr(value, "variant_level"):
943
properties[name] = value
659
all[name] = value
944
660
continue
945
properties[name] = type(value)(value, variant_level=
946
value.variant_level+1)
947
return dbus.Dictionary(properties, signature="sv")
661
all[name] = type(value)(value, variant_level=
662
value.variant_level+1)
663
return dbus.Dictionary(all, signature="sv")
948
664
949
665
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
950
666
out_signature="s",
951
667
path_keyword='object_path',
952
668
connection_keyword='connection')
953
669
def Introspect(self, object_path, connection):
954
"""Overloading of standard D-Bus method.
955
956
Inserts property tags and interface annotation tags.
670
"""Standard D-Bus method, overloaded to insert property tags.
957
671
"""
958
672
xmlstring = dbus.service.Object.Introspect(self, object_path,
959
673
connection)
966
680
e.setAttribute("access", prop._dbus_access)
967
681
return e
968
682
for if_tag in document.getElementsByTagName("interface"):
969
# Add property tags
970
683
for tag in (make_tag(document, name, prop)
971
684
for name, prop
972
in self._get_all_dbus_things("property")
685
in self._get_all_dbus_properties()
973
686
if prop._dbus_interface
974
687
== if_tag.getAttribute("name")):
975
688
if_tag.appendChild(tag)
976
# Add annotation tags
977
for typ in ("method", "signal", "property"):
978
for tag in if_tag.getElementsByTagName(typ):
979
annots = dict()
980
for name, prop in (self.
981
_get_all_dbus_things(typ)):
982
if (name == tag.getAttribute("name")
983
and prop._dbus_interface
984
== if_tag.getAttribute("name")):
985
annots.update(getattr
986
(prop,
987
"_dbus_annotations",
988
{}))
989
for name, value in annots.items():
990
ann_tag = document.createElement(
991
"annotation")
992
ann_tag.setAttribute("name", name)
993
ann_tag.setAttribute("value", value)
994
tag.appendChild(ann_tag)
995
# Add interface annotation tags
996
for annotation, value in dict(
997
itertools.chain.from_iterable(
998
annotations().items()
999
for name, annotations in
1000
self._get_all_dbus_things("interface")
1001
if name == if_tag.getAttribute("name")
1002
)).items():
1003
ann_tag = document.createElement("annotation")
1004
ann_tag.setAttribute("name", annotation)
1005
ann_tag.setAttribute("value", value)
1006
if_tag.appendChild(ann_tag)
1007
689
# Add the names to the return values for the
1008
690
# "org.freedesktop.DBus.Properties" methods
1009
691
if (if_tag.getAttribute("name")
1022
704
xmlstring = document.toxml("utf-8")
1023
705
document.unlink()
1024
706
except (AttributeError, xml.dom.DOMException,
1025
xml.parsers.expat.ExpatError) as error:
707
xml.parsers.expat.ExpatError), error:
1026
708
logger.error("Failed to override Introspection method",
1027
exc_info=error)
709
error)
1028
710
return xmlstring
1029
711
1030
712
1031
def datetime_to_dbus(dt, variant_level=0):
1032
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1033
if dt is None:
1034
return dbus.String("", variant_level = variant_level)
1035
return dbus.String(dt.isoformat(),
1036
variant_level=variant_level)
1037
1038
1039
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1040
"""A class decorator; applied to a subclass of
1041
dbus.service.Object, it will add alternate D-Bus attributes with
1042
interface names according to the "alt_interface_names" mapping.
1043
Usage:
1044
1045
@alternate_dbus_interfaces({"org.example.Interface":
1046
"net.example.AlternateInterface"})
1047
class SampleDBusObject(dbus.service.Object):
1048
@dbus.service.method("org.example.Interface")
1049
def SampleDBusMethod():
1050
pass
1051
1052
The above "SampleDBusMethod" on "SampleDBusObject" will be
1053
reachable via two interfaces: "org.example.Interface" and
1054
"net.example.AlternateInterface", the latter of which will have
1055
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1056
"true", unless "deprecate" is passed with a False value.
1057
1058
This works for methods and signals, and also for D-Bus properties
1059
(from DBusObjectWithProperties) and interfaces (from the
1060
dbus_interface_annotations decorator).
1061
"""
1062
def wrapper(cls):
1063
for orig_interface_name, alt_interface_name in (
1064
alt_interface_names.items()):
1065
attr = {}
1066
interface_names = set()
1067
# Go though all attributes of the class
1068
for attrname, attribute in inspect.getmembers(cls):
1069
# Ignore non-D-Bus attributes, and D-Bus attributes
1070
# with the wrong interface name
1071
if (not hasattr(attribute, "_dbus_interface")
1072
or not attribute._dbus_interface
1073
.startswith(orig_interface_name)):
1074
continue
1075
# Create an alternate D-Bus interface name based on
1076
# the current name
1077
alt_interface = (attribute._dbus_interface
1078
.replace(orig_interface_name,
1079
alt_interface_name))
1080
interface_names.add(alt_interface)
1081
# Is this a D-Bus signal?
1082
if getattr(attribute, "_dbus_is_signal", False):
1083
# Extract the original non-method undecorated
1084
# function by black magic
1085
nonmethod_func = (dict(
1086
zip(attribute.func_code.co_freevars,
1087
attribute.__closure__))["func"]
1088
.cell_contents)
1089
# Create a new, but exactly alike, function
1090
# object, and decorate it to be a new D-Bus signal
1091
# with the alternate D-Bus interface name
1092
new_function = (dbus.service.signal
1093
(alt_interface,
1094
attribute._dbus_signature)
1095
(types.FunctionType(
1096
nonmethod_func.func_code,
1097
nonmethod_func.func_globals,
1098
nonmethod_func.func_name,
1099
nonmethod_func.func_defaults,
1100
nonmethod_func.func_closure)))
1101
# Copy annotations, if any
1102
try:
1103
new_function._dbus_annotations = (
1104
dict(attribute._dbus_annotations))
1105
except AttributeError:
1106
pass
1107
# Define a creator of a function to call both the
1108
# original and alternate functions, so both the
1109
# original and alternate signals gets sent when
1110
# the function is called
1111
def fixscope(func1, func2):
1112
"""This function is a scope container to pass
1113
func1 and func2 to the "call_both" function
1114
outside of its arguments"""
1115
def call_both(*args, **kwargs):
1116
"""This function will emit two D-Bus
1117
signals by calling func1 and func2"""
1118
func1(*args, **kwargs)
1119
func2(*args, **kwargs)
1120
return call_both
1121
# Create the "call_both" function and add it to
1122
# the class
1123
attr[attrname] = fixscope(attribute, new_function)
1124
# Is this a D-Bus method?
1125
elif getattr(attribute, "_dbus_is_method", False):
1126
# Create a new, but exactly alike, function
1127
# object. Decorate it to be a new D-Bus method
1128
# with the alternate D-Bus interface name. Add it
1129
# to the class.
1130
attr[attrname] = (dbus.service.method
1131
(alt_interface,
1132
attribute._dbus_in_signature,
1133
attribute._dbus_out_signature)
1134
(types.FunctionType
1135
(attribute.func_code,
1136
attribute.func_globals,
1137
attribute.func_name,
1138
attribute.func_defaults,
1139
attribute.func_closure)))
1140
# Copy annotations, if any
1141
try:
1142
attr[attrname]._dbus_annotations = (
1143
dict(attribute._dbus_annotations))
1144
except AttributeError:
1145
pass
1146
# Is this a D-Bus property?
1147
elif getattr(attribute, "_dbus_is_property", False):
1148
# Create a new, but exactly alike, function
1149
# object, and decorate it to be a new D-Bus
1150
# property with the alternate D-Bus interface
1151
# name. Add it to the class.
1152
attr[attrname] = (dbus_service_property
1153
(alt_interface,
1154
attribute._dbus_signature,
1155
attribute._dbus_access,
1156
attribute
1157
._dbus_get_args_options
1158
["byte_arrays"])
1159
(types.FunctionType
1160
(attribute.func_code,
1161
attribute.func_globals,
1162
attribute.func_name,
1163
attribute.func_defaults,
1164
attribute.func_closure)))
1165
# Copy annotations, if any
1166
try:
1167
attr[attrname]._dbus_annotations = (
1168
dict(attribute._dbus_annotations))
1169
except AttributeError:
1170
pass
1171
# Is this a D-Bus interface?
1172
elif getattr(attribute, "_dbus_is_interface", False):
1173
# Create a new, but exactly alike, function
1174
# object. Decorate it to be a new D-Bus interface
1175
# with the alternate D-Bus interface name. Add it
1176
# to the class.
1177
attr[attrname] = (dbus_interface_annotations
1178
(alt_interface)
1179
(types.FunctionType
1180
(attribute.func_code,
1181
attribute.func_globals,
1182
attribute.func_name,
1183
attribute.func_defaults,
1184
attribute.func_closure)))
1185
if deprecate:
1186
# Deprecate all alternate interfaces
1187
iname="_AlternateDBusNames_interface_annotation{}"
1188
for interface_name in interface_names:
1189
@dbus_interface_annotations(interface_name)
1190
def func(self):
1191
return { "org.freedesktop.DBus.Deprecated":
1192
"true" }
1193
# Find an unused name
1194
for aname in (iname.format(i)
1195
for i in itertools.count()):
1196
if aname not in attr:
1197
attr[aname] = func
1198
break
1199
if interface_names:
1200
# Replace the class with a new subclass of it with
1201
# methods, signals, etc. as created above.
1202
cls = type(b"{}Alternate".format(cls.__name__),
1203
(cls,), attr)
1204
return cls
1205
return wrapper
1206
1207
1208
@alternate_dbus_interfaces({"se.recompile.Mandos":
1209
"se.bsnet.fukt.Mandos"})
1210
713
class ClientDBus(Client, DBusObjectWithProperties):
1211
714
"""A Client class using D-Bus
1212
715
1221
724
# dbus.service.Object doesn't use super(), so we can't either.
1222
725
1223
726
def __init__(self, bus = None, *args, **kwargs):
727
self._approvals_pending = 0
1224
728
self.bus = bus
1225
729
Client.__init__(self, *args, **kwargs)
1226
730
# Only now, when this client is initialized, can it show up on
1227
731
# the D-Bus
1228
client_object_name = str(self.name).translate(
732
client_object_name = unicode(self.name).translate(
1229
733
{ord("."): ord("_"),
1230
734
ord("-"): ord("_")})
1231
735
self.dbus_object_path = (dbus.ObjectPath
1232
736
("/clients/" + client_object_name))
1233
737
DBusObjectWithProperties.__init__(self, self.bus,
1234
738
self.dbus_object_path)
1235
1236
def notifychangeproperty(transform_func,
1237
dbus_name, type_func=lambda x: x,
1238
variant_level=1):
1239
""" Modify a variable so that it's a property which announces
1240
its changes to DBus.
1241
1242
transform_fun: Function that takes a value and a variant_level
1243
and transforms it to a D-Bus type.
1244
dbus_name: D-Bus name of the variable
1245
type_func: Function that transform the value before sending it
1246
to the D-Bus. Default: no transform
1247
variant_level: D-Bus variant level. Default: 1
1248
"""
1249
attrname = "_{}".format(dbus_name)
1250
def setter(self, value):
1251
if hasattr(self, "dbus_object_path"):
1252
if (not hasattr(self, attrname) or
1253
type_func(getattr(self, attrname, None))
1254
!= type_func(value)):
1255
dbus_value = transform_func(type_func(value),
1256
variant_level
1257
=variant_level)
1258
self.PropertyChanged(dbus.String(dbus_name),
1259
dbus_value)
1260
setattr(self, attrname, value)
1261
1262
return property(lambda self: getattr(self, attrname), setter)
1263
1264
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1265
approvals_pending = notifychangeproperty(dbus.Boolean,
1266
"ApprovalPending",
1267
type_func = bool)
1268
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1269
last_enabled = notifychangeproperty(datetime_to_dbus,
1270
"LastEnabled")
1271
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1272
type_func = lambda checker:
1273
checker is not None)
1274
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1275
"LastCheckedOK")
1276
last_checker_status = notifychangeproperty(dbus.Int16,
1277
"LastCheckerStatus")
1278
last_approval_request = notifychangeproperty(
1279
datetime_to_dbus, "LastApprovalRequest")
1280
approved_by_default = notifychangeproperty(dbus.Boolean,
1281
"ApprovedByDefault")
1282
approval_delay = notifychangeproperty(dbus.UInt64,
1283
"ApprovalDelay",
1284
type_func =
1285
lambda td: td.total_seconds()
1286
* 1000)
1287
approval_duration = notifychangeproperty(
1288
dbus.UInt64, "ApprovalDuration",
1289
type_func = lambda td: td.total_seconds() * 1000)
1290
host = notifychangeproperty(dbus.String, "Host")
1291
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1292
type_func = lambda td:
1293
td.total_seconds() * 1000)
1294
extended_timeout = notifychangeproperty(
1295
dbus.UInt64, "ExtendedTimeout",
1296
type_func = lambda td: td.total_seconds() * 1000)
1297
interval = notifychangeproperty(dbus.UInt64,
1298
"Interval",
1299
type_func =
1300
lambda td: td.total_seconds()
1301
* 1000)
1302
checker_command = notifychangeproperty(dbus.String, "Checker")
1303
1304
del notifychangeproperty
739
740
def _get_approvals_pending(self):
741
return self._approvals_pending
742
def _set_approvals_pending(self, value):
743
old_value = self._approvals_pending
744
self._approvals_pending = value
745
bval = bool(value)
746
if (hasattr(self, "dbus_object_path")
747
and bval is not bool(old_value)):
748
dbus_bool = dbus.Boolean(bval, variant_level=1)
749
self.PropertyChanged(dbus.String("ApprovalPending"),
750
dbus_bool)
751
752
approvals_pending = property(_get_approvals_pending,
753
_set_approvals_pending)
754
del _get_approvals_pending, _set_approvals_pending
755
756
@staticmethod
757
def _datetime_to_dbus(dt, variant_level=0):
758
"""Convert a UTC datetime.datetime() to a D-Bus type."""
759
return dbus.String(dt.isoformat(),
760
variant_level=variant_level)
761
762
def enable(self):
763
oldstate = getattr(self, "enabled", False)
764
r = Client.enable(self)
765
if oldstate != self.enabled:
766
# Emit D-Bus signals
767
self.PropertyChanged(dbus.String("Enabled"),
768
dbus.Boolean(True, variant_level=1))
769
self.PropertyChanged(
770
dbus.String("LastEnabled"),
771
self._datetime_to_dbus(self.last_enabled,
772
variant_level=1))
773
return r
774
775
def disable(self, quiet = False):
776
oldstate = getattr(self, "enabled", False)
777
r = Client.disable(self, quiet=quiet)
778
if not quiet and oldstate != self.enabled:
779
# Emit D-Bus signal
780
self.PropertyChanged(dbus.String("Enabled"),
781
dbus.Boolean(False, variant_level=1))
782
return r
1305
783
1306
784
def __del__(self, *args, **kwargs):
1307
785
try:
1316
794
*args, **kwargs):
1317
795
self.checker_callback_tag = None
1318
796
self.checker = None
797
# Emit D-Bus signal
798
self.PropertyChanged(dbus.String("CheckerRunning"),
799
dbus.Boolean(False, variant_level=1))
1319
800
if os.WIFEXITED(condition):
1320
801
exitstatus = os.WEXITSTATUS(condition)
1321
802
# Emit D-Bus signal
1331
812
return Client.checker_callback(self, pid, condition, command,
1332
813
*args, **kwargs)
1333
814
815
def checked_ok(self, *args, **kwargs):
816
r = Client.checked_ok(self, *args, **kwargs)
817
# Emit D-Bus signal
818
self.PropertyChanged(
819
dbus.String("LastCheckedOK"),
820
(self._datetime_to_dbus(self.last_checked_ok,
821
variant_level=1)))
822
return r
823
824
def need_approval(self, *args, **kwargs):
825
r = Client.need_approval(self, *args, **kwargs)
826
# Emit D-Bus signal
827
self.PropertyChanged(
828
dbus.String("LastApprovalRequest"),
829
(self._datetime_to_dbus(self.last_approval_request,
830
variant_level=1)))
831
return r
832
1334
833
def start_checker(self, *args, **kwargs):
1335
old_checker_pid = getattr(self.checker, "pid", None)
834
old_checker = self.checker
835
if self.checker is not None:
836
old_checker_pid = self.checker.pid
837
else:
838
old_checker_pid = None
1336
839
r = Client.start_checker(self, *args, **kwargs)
1337
840
# Only if new checker process was started
1338
841
if (self.checker is not None
1339
842
and old_checker_pid != self.checker.pid):
1340
843
# Emit D-Bus signal
1341
844
self.CheckerStarted(self.current_checker_command)
845
self.PropertyChanged(
846
dbus.String("CheckerRunning"),
847
dbus.Boolean(True, variant_level=1))
1342
848
return r
1343
849
850
def stop_checker(self, *args, **kwargs):
851
old_checker = getattr(self, "checker", None)
852
r = Client.stop_checker(self, *args, **kwargs)
853
if (old_checker is not None
854
and getattr(self, "checker", None) is None):
855
self.PropertyChanged(dbus.String("CheckerRunning"),
856
dbus.Boolean(False, variant_level=1))
857
return r
858
1344
859
def _reset_approved(self):
1345
self.approved = None
860
self._approved = None
1346
861
return False
1347
862
1348
863
def approve(self, value=True):
1349
self.approved = value
1350
gobject.timeout_add(int(self.approval_duration.total_seconds()
1351
* 1000), self._reset_approved)
1352
864
self.send_changedstate()
865
self._approved = value
866
gobject.timeout_add(self._timedelta_to_milliseconds
867
(self.approval_duration),
868
self._reset_approved)
869
1353
870
1354
871
## D-Bus methods, signals & properties
1355
_interface = "se.recompile.Mandos.Client"
1356
1357
## Interfaces
1358
1359
@dbus_interface_annotations(_interface)
1360
def _foo(self):
1361
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1362
"false"}
872
_interface = "se.bsnet.fukt.Mandos.Client"
1363
873
1364
874
## Signals
1365
875
1412
922
# CheckedOK - method
1413
923
@dbus.service.method(_interface)
1414
924
def CheckedOK(self):
1415
self.checked_ok()
925
return self.checked_ok()
1416
926
1417
927
# Enable - method
1418
928
@dbus.service.method(_interface)
1451
961
if value is None: # get
1452
962
return dbus.Boolean(self.approved_by_default)
1453
963
self.approved_by_default = bool(value)
964
# Emit D-Bus signal
965
self.PropertyChanged(dbus.String("ApprovedByDefault"),
966
dbus.Boolean(value, variant_level=1))
1454
967
1455
968
# ApprovalDelay - property
1456
969
@dbus_service_property(_interface, signature="t",
1457
970
access="readwrite")
1458
971
def ApprovalDelay_dbus_property(self, value=None):
1459
972
if value is None: # get
1460
return dbus.UInt64(self.approval_delay.total_seconds()
1461
* 1000)
973
return dbus.UInt64(self.approval_delay_milliseconds())
1462
974
self.approval_delay = datetime.timedelta(0, 0, 0, value)
975
# Emit D-Bus signal
976
self.PropertyChanged(dbus.String("ApprovalDelay"),
977
dbus.UInt64(value, variant_level=1))
1463
978
1464
979
# ApprovalDuration - property
1465
980
@dbus_service_property(_interface, signature="t",
1466
981
access="readwrite")
1467
982
def ApprovalDuration_dbus_property(self, value=None):
1468
983
if value is None: # get
1469
return dbus.UInt64(self.approval_duration.total_seconds()
1470
* 1000)
984
return dbus.UInt64(self._timedelta_to_milliseconds(
985
self.approval_duration))
1471
986
self.approval_duration = datetime.timedelta(0, 0, 0, value)
987
# Emit D-Bus signal
988
self.PropertyChanged(dbus.String("ApprovalDuration"),
989
dbus.UInt64(value, variant_level=1))
1472
990
1473
991
# Name - property
1474
992
@dbus_service_property(_interface, signature="s", access="read")
1486
1004
def Host_dbus_property(self, value=None):
1487
1005
if value is None: # get
1488
1006
return dbus.String(self.host)
1489
self.host = str(value)
1007
self.host = value
1008
# Emit D-Bus signal
1009
self.PropertyChanged(dbus.String("Host"),
1010
dbus.String(value, variant_level=1))
1490
1011
1491
1012
# Created - property
1492
1013
@dbus_service_property(_interface, signature="s", access="read")
1493
1014
def Created_dbus_property(self):
1494
return datetime_to_dbus(self.created)
1015
return dbus.String(self._datetime_to_dbus(self.created))
1495
1016
1496
1017
# LastEnabled - property
1497
1018
@dbus_service_property(_interface, signature="s", access="read")
1498
1019
def LastEnabled_dbus_property(self):
1499
return datetime_to_dbus(self.last_enabled)
1020
if self.last_enabled is None:
1021
return dbus.String("")
1022
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1500
1023
1501
1024
# Enabled - property
1502
1025
@dbus_service_property(_interface, signature="b",
1516
1039
if value is not None:
1517
1040
self.checked_ok()
1518
1041
return
1519
return datetime_to_dbus(self.last_checked_ok)
1520
1521
# LastCheckerStatus - property
1522
@dbus_service_property(_interface, signature="n",
1523
access="read")
1524
def LastCheckerStatus_dbus_property(self):
1525
return dbus.Int16(self.last_checker_status)
1526
1527
# Expires - property
1528
@dbus_service_property(_interface, signature="s", access="read")
1529
def Expires_dbus_property(self):
1530
return datetime_to_dbus(self.expires)
1042
if self.last_checked_ok is None:
1043
return dbus.String("")
1044
return dbus.String(self._datetime_to_dbus(self
1045
.last_checked_ok))
1531
1046
1532
1047
# LastApprovalRequest - property
1533
1048
@dbus_service_property(_interface, signature="s", access="read")
1534
1049
def LastApprovalRequest_dbus_property(self):
1535
return datetime_to_dbus(self.last_approval_request)
1050
if self.last_approval_request is None:
1051
return dbus.String("")
1052
return dbus.String(self.
1053
_datetime_to_dbus(self
1054
.last_approval_request))
1536
1055
1537
1056
# Timeout - property
1538
1057
@dbus_service_property(_interface, signature="t",
1539
1058
access="readwrite")
1540
1059
def Timeout_dbus_property(self, value=None):
1541
1060
if value is None: # get
1542
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1543
old_timeout = self.timeout
1061
return dbus.UInt64(self.timeout_milliseconds())
1544
1062
self.timeout = datetime.timedelta(0, 0, 0, value)
1545
# Reschedule disabling
1546
if self.enabled:
1547
now = datetime.datetime.utcnow()
1548
self.expires += self.timeout - old_timeout
1549
if self.expires <= now:
1550
# The timeout has passed
1551
self.disable()
1552
else:
1553
if (getattr(self, "disable_initiator_tag", None)
1554
is None):
1555
return
1556
gobject.source_remove(self.disable_initiator_tag)
1557
self.disable_initiator_tag = (
1558
gobject.timeout_add(
1559
int((self.expires - now).total_seconds()
1560
* 1000), self.disable))
1561
1562
# ExtendedTimeout - property
1563
@dbus_service_property(_interface, signature="t",
1564
access="readwrite")
1565
def ExtendedTimeout_dbus_property(self, value=None):
1566
if value is None: # get
1567
return dbus.UInt64(self.extended_timeout.total_seconds()
1568
* 1000)
1569
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1063
# Emit D-Bus signal
1064
self.PropertyChanged(dbus.String("Timeout"),
1065
dbus.UInt64(value, variant_level=1))
1066
if getattr(self, "disable_initiator_tag", None) is None:
1067
return
1068
# Reschedule timeout
1069
gobject.source_remove(self.disable_initiator_tag)
1070
self.disable_initiator_tag = None
1071
time_to_die = (self.
1072
_timedelta_to_milliseconds((self
1073
.last_checked_ok
1074
+ self.timeout)
1075
- datetime.datetime
1076
.utcnow()))
1077
if time_to_die <= 0:
1078
# The timeout has passed
1079
self.disable()
1080
else:
1081
self.disable_initiator_tag = (gobject.timeout_add
1082
(time_to_die, self.disable))
1570
1083
1571
1084
# Interval - property
1572
1085
@dbus_service_property(_interface, signature="t",
1573
1086
access="readwrite")
1574
1087
def Interval_dbus_property(self, value=None):
1575
1088
if value is None: # get
1576
return dbus.UInt64(self.interval.total_seconds() * 1000)
1089
return dbus.UInt64(self.interval_milliseconds())
1577
1090
self.interval = datetime.timedelta(0, 0, 0, value)
1091
# Emit D-Bus signal
1092
self.PropertyChanged(dbus.String("Interval"),
1093
dbus.UInt64(value, variant_level=1))
1578
1094
if getattr(self, "checker_initiator_tag", None) is None:
1579
1095
return
1580
if self.enabled:
1581
# Reschedule checker run
1582
gobject.source_remove(self.checker_initiator_tag)
1583
self.checker_initiator_tag = (gobject.timeout_add
1584
(value, self.start_checker))
1585
self.start_checker() # Start one now, too
1586
1096
# Reschedule checker run
1097
gobject.source_remove(self.checker_initiator_tag)
1098
self.checker_initiator_tag = (gobject.timeout_add
1099
(value, self.start_checker))
1100
self.start_checker() # Start one now, too
1101
1587
1102
# Checker - property
1588
1103
@dbus_service_property(_interface, signature="s",
1589
1104
access="readwrite")
1590
1105
def Checker_dbus_property(self, value=None):
1591
1106
if value is None: # get
1592
1107
return dbus.String(self.checker_command)
1593
self.checker_command = str(value)
1108
self.checker_command = value
1109
# Emit D-Bus signal
1110
self.PropertyChanged(dbus.String("Checker"),
1111
dbus.String(self.checker_command,
1112
variant_level=1))
1594
1113
1595
1114
# CheckerRunning - property
1596
1115
@dbus_service_property(_interface, signature="b",
1612
1131
@dbus_service_property(_interface, signature="ay",
1613
1132
access="write", byte_arrays=True)
1614
1133
def Secret_dbus_property(self, value):
1615
self.secret = bytes(value)
1134
self.secret = str(value)
1616
1135
1617
1136
del _interface
1618
1137
1623
1142
self._pipe.send(('init', fpr, address))
1624
1143
if not self._pipe.recv():
1625
1144
raise KeyError()
1626
1145
1627
1146
def __getattribute__(self, name):
1628
if name == '_pipe':
1147
if(name == '_pipe'):
1629
1148
return super(ProxyClient, self).__getattribute__(name)
1630
1149
self._pipe.send(('getattr', name))
1631
1150
data = self._pipe.recv()
1636
1155
self._pipe.send(('funcall', name, args, kwargs))
1637
1156
return self._pipe.recv()[1]
1638
1157
return func
1639
1158
1640
1159
def __setattr__(self, name, value):
1641
if name == '_pipe':
1160
if(name == '_pipe'):
1642
1161
return super(ProxyClient, self).__setattr__(name, value)
1643
1162
self._pipe.send(('setattr', name, value))
1644
1163
1652
1171
def handle(self):
1653
1172
with contextlib.closing(self.server.child_pipe) as child_pipe:
1654
1173
logger.info("TCP connection from: %s",
1655
str(self.client_address))
1174
unicode(self.client_address))
1656
1175
logger.debug("Pipe FD: %d",
1657
1176
self.server.child_pipe.fileno())
1658
1177
1659
1178
session = (gnutls.connection
1660
1179
.ClientSession(self.request,
1661
1180
gnutls.connection
1662
1181
.X509Credentials()))
1663
1182
1664
1183
# Note: gnutls.connection.X509Credentials is really a
1665
1184
# generic GnuTLS certificate credentials object so long as
1666
1185
# no X.509 keys are added to it. Therefore, we can use it
1667
1186
# here despite using OpenPGP certificates.
1668
1187
1669
1188
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1670
1189
# "+AES-256-CBC", "+SHA1",
1671
1190
# "+COMP-NULL", "+CTYPE-OPENPGP",
1677
1196
(gnutls.library.functions
1678
1197
.gnutls_priority_set_direct(session._c_object,
1679
1198
priority, None))
1680
1199
1681
1200
# Start communication using the Mandos protocol
1682
1201
# Get protocol number
1683
1202
line = self.request.makefile().readline()
1684
1203
logger.debug("Protocol version: %r", line)
1685
1204
try:
1686
1205
if int(line.strip().split()[0]) > 1:
1687
raise RuntimeError(line)
1688
except (ValueError, IndexError, RuntimeError) as error:
1206
raise RuntimeError
1207
except (ValueError, IndexError, RuntimeError), error:
1689
1208
logger.error("Unknown protocol version: %s", error)
1690
1209
return
1691
1210
1692
1211
# Start GnuTLS connection
1693
1212
try:
1694
1213
session.handshake()
1695
except gnutls.errors.GNUTLSError as error:
1214
except gnutls.errors.GNUTLSError, error:
1696
1215
logger.warning("Handshake failed: %s", error)
1697
1216
# Do not run session.bye() here: the session is not
1698
1217
# established. Just abandon the request.
1699
1218
return
1700
1219
logger.debug("Handshake succeeded")
1701
1220
1702
1221
approval_required = False
1703
1222
try:
1704
1223
try:
1705
1224
fpr = self.fingerprint(self.peer_certificate
1706
1225
(session))
1707
except (TypeError,
1708
gnutls.errors.GNUTLSError) as error:
1226
except (TypeError, gnutls.errors.GNUTLSError), error:
1709
1227
logger.warning("Bad certificate: %s", error)
1710
1228
return
1711
1229
logger.debug("Fingerprint: %s", fpr)
1712
1230
1713
1231
try:
1714
1232
client = ProxyClient(child_pipe, fpr,
1715
1233
self.client_address)
1723
1241
1724
1242
while True:
1725
1243
if not client.enabled:
1726
logger.info("Client %s is disabled",
1244
logger.warning("Client %s is disabled",
1727
1245
client.name)
1728
1246
if self.server.use_dbus:
1729
1247
# Emit D-Bus signal
1730
client.Rejected("Disabled")
1248
client.Rejected("Disabled")
1731
1249
return
1732
1250
1733
if client.approved or not client.approval_delay:
1251
if client._approved or not client.approval_delay:
1734
1252
#We are approved or approval is disabled
1735
1253
break
1736
elif client.approved is None:
1254
elif client._approved is None:
1737
1255
logger.info("Client %s needs approval",
1738
1256
client.name)
1739
1257
if self.server.use_dbus:
1740
1258
# Emit D-Bus signal
1741
1259
client.NeedApproval(
1742
client.approval_delay.total_seconds()
1743
* 1000, client.approved_by_default)
1260
client.approval_delay_milliseconds(),
1261
client.approved_by_default)
1744
1262
else:
1745
1263
logger.warning("Client %s was not approved",
1746
1264
client.name)
1750
1268
return
1751
1269
1752
1270
#wait until timeout or approved
1271
#x = float(client._timedelta_to_milliseconds(delay))
1753
1272
time = datetime.datetime.now()
1754
1273
client.changedstate.acquire()
1755
client.changedstate.wait(delay.total_seconds())
1274
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1756
1275
client.changedstate.release()
1757
1276
time2 = datetime.datetime.now()
1758
1277
if (time2 - time) >= delay:
1773
1292
while sent_size < len(client.secret):
1774
1293
try:
1775
1294
sent = session.send(client.secret[sent_size:])
1776
except gnutls.errors.GNUTLSError as error:
1777
logger.warning("gnutls send failed",
1778
exc_info=error)
1295
except (gnutls.errors.GNUTLSError), error:
1296
logger.warning("gnutls send failed")
1779
1297
return
1780
1298
logger.debug("Sent: %d, remaining: %d",
1781
1299
sent, len(client.secret)
1782
1300
- (sent_size + sent))
1783
1301
sent_size += sent
1784
1302
1785
1303
logger.info("Sending secret to %s", client.name)
1786
# bump the timeout using extended_timeout
1787
client.bump_timeout(client.extended_timeout)
1304
# bump the timeout as if seen
1305
client.checked_ok()
1788
1306
if self.server.use_dbus:
1789
1307
# Emit D-Bus signal
1790
1308
client.GotSecret()
1794
1312
client.approvals_pending -= 1
1795
1313
try:
1796
1314
session.bye()
1797
except gnutls.errors.GNUTLSError as error:
1798
logger.warning("GnuTLS bye failed",
1799
exc_info=error)
1315
except (gnutls.errors.GNUTLSError), error:
1316
logger.warning("GnuTLS bye failed")
1800
1317
1801
1318
@staticmethod
1802
1319
def peer_certificate(session):
1858
1375
# Convert the buffer to a Python bytestring
1859
1376
fpr = ctypes.string_at(buf, buf_len.value)
1860
1377
# Convert the bytestring to hexadecimal notation
1861
hex_fpr = binascii.hexlify(fpr).upper()
1378
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1862
1379
return hex_fpr
1863
1380
1864
1381
1867
1384
def sub_process_main(self, request, address):
1868
1385
try:
1869
1386
self.finish_request(request, address)
1870
except Exception:
1387
except:
1871
1388
self.handle_error(request, address)
1872
1389
self.close_request(request)
1873
1390
1874
1391
def process_request(self, request, address):
1875
1392
"""Start a new process to process the request."""
1876
proc = multiprocessing.Process(target = self.sub_process_main,
1877
args = (request, address))
1878
proc.start()
1879
return proc
1880
1393
multiprocessing.Process(target = self.sub_process_main,
1394
args = (request, address)).start()
1881
1395
1882
1396
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1883
1397
""" adds a pipe to the MixIn """
1887
1401
This function creates a new pipe in self.pipe
1888
1402
"""
1889
1403
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1890
1891
proc = MultiprocessingMixIn.process_request(self, request,
1892
client_address)
1404
1405
super(MultiprocessingMixInWithPipe,
1406
self).process_request(request, client_address)
1893
1407
self.child_pipe.close()
1894
self.add_pipe(parent_pipe, proc)
1895
1896
def add_pipe(self, parent_pipe, proc):
1408
self.add_pipe(parent_pipe)
1409
1410
def add_pipe(self, parent_pipe):
1897
1411
"""Dummy function; override as necessary"""
1898
raise NotImplementedError()
1899
1412
raise NotImplementedError
1900
1413
1901
1414
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1902
1415
socketserver.TCPServer, object):
1908
1421
use_ipv6: Boolean; to use IPv6 or not
1909
1422
"""
1910
1423
def __init__(self, server_address, RequestHandlerClass,
1911
interface=None, use_ipv6=True, socketfd=None):
1912
"""If socketfd is set, use that file descriptor instead of
1913
creating a new one with socket.socket().
1914
"""
1424
interface=None, use_ipv6=True):
1915
1425
self.interface = interface
1916
1426
if use_ipv6:
1917
1427
self.address_family = socket.AF_INET6
1918
if socketfd is not None:
1919
# Save the file descriptor
1920
self.socketfd = socketfd
1921
# Save the original socket.socket() function
1922
self.socket_socket = socket.socket
1923
# To implement --socket, we monkey patch socket.socket.
1924
#
1925
# (When socketserver.TCPServer is a new-style class, we
1926
# could make self.socket into a property instead of monkey
1927
# patching socket.socket.)
1928
#
1929
# Create a one-time-only replacement for socket.socket()
1930
@functools.wraps(socket.socket)
1931
def socket_wrapper(*args, **kwargs):
1932
# Restore original function so subsequent calls are
1933
# not affected.
1934
socket.socket = self.socket_socket
1935
del self.socket_socket
1936
# This time only, return a new socket object from the
1937
# saved file descriptor.
1938
return socket.fromfd(self.socketfd, *args, **kwargs)
1939
# Replace socket.socket() function with wrapper
1940
socket.socket = socket_wrapper
1941
# The socketserver.TCPServer.__init__ will call
1942
# socket.socket(), which might be our replacement,
1943
# socket_wrapper(), if socketfd was set.
1944
1428
socketserver.TCPServer.__init__(self, server_address,
1945
1429
RequestHandlerClass)
1946
1947
1430
def server_bind(self):
1948
1431
"""This overrides the normal server_bind() function
1949
1432
to bind to an interface if one was specified, and also NOT to
1957
1440
try:
1958
1441
self.socket.setsockopt(socket.SOL_SOCKET,
1959
1442
SO_BINDTODEVICE,
1960
(self.interface + "\0")
1961
.encode("utf-8"))
1962
except socket.error as error:
1963
if error.errno == errno.EPERM:
1964
logger.error("No permission to bind to"
1965
" interface %s", self.interface)
1966
elif error.errno == errno.ENOPROTOOPT:
1443
str(self.interface
1444
+ '\0'))
1445
except socket.error, error:
1446
if error[0] == errno.EPERM:
1447
logger.error("No permission to"
1448
" bind to interface %s",
1449
self.interface)
1450
elif error[0] == errno.ENOPROTOOPT:
1967
1451
logger.error("SO_BINDTODEVICE not available;"
1968
1452
" cannot bind to interface %s",
1969
1453
self.interface)
1970
elif error.errno == errno.ENODEV:
1971
logger.error("Interface %s does not exist,"
1972
" cannot bind", self.interface)
1973
1454
else:
1974
1455
raise
1975
1456
# Only bind(2) the socket if we really need to.
1978
1459
if self.address_family == socket.AF_INET6:
1979
1460
any_address = "::" # in6addr_any
1980
1461
else:
1981
any_address = "0.0.0.0" # INADDR_ANY
1462
any_address = socket.INADDR_ANY
1982
1463
self.server_address = (any_address,
1983
1464
self.server_address[1])
1984
1465
elif not self.server_address[1]:
2005
1486
"""
2006
1487
def __init__(self, server_address, RequestHandlerClass,
2007
1488
interface=None, use_ipv6=True, clients=None,
2008
gnutls_priority=None, use_dbus=True, socketfd=None):
1489
gnutls_priority=None, use_dbus=True):
2009
1490
self.enabled = False
2010
1491
self.clients = clients
2011
1492
if self.clients is None:
2012
self.clients = {}
1493
self.clients = set()
2013
1494
self.use_dbus = use_dbus
2014
1495
self.gnutls_priority = gnutls_priority
2015
1496
IPv6_TCPServer.__init__(self, server_address,
2016
1497
RequestHandlerClass,
2017
1498
interface = interface,
2018
use_ipv6 = use_ipv6,
2019
socketfd = socketfd)
1499
use_ipv6 = use_ipv6)
2020
1500
def server_activate(self):
2021
1501
if self.enabled:
2022
1502
return socketserver.TCPServer.server_activate(self)
2023
2024
1503
def enable(self):
2025
1504
self.enabled = True
2026
2027
def add_pipe(self, parent_pipe, proc):
1505
def add_pipe(self, parent_pipe):
2028
1506
# Call "handle_ipc" for both data and EOF events
2029
1507
gobject.io_add_watch(parent_pipe.fileno(),
2030
1508
gobject.IO_IN | gobject.IO_HUP,
2031
1509
functools.partial(self.handle_ipc,
2032
parent_pipe =
2033
parent_pipe,
2034
proc = proc))
2035
1510
parent_pipe = parent_pipe))
1511
2036
1512
def handle_ipc(self, source, condition, parent_pipe=None,
2037
proc = None, client_object=None):
2038
# error, or the other end of multiprocessing.Pipe has closed
2039
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2040
# Wait for other process to exit
2041
proc.join()
1513
client_object=None):
1514
condition_names = {
1515
gobject.IO_IN: "IN", # There is data to read.
1516
gobject.IO_OUT: "OUT", # Data can be written (without
1517
# blocking).
1518
gobject.IO_PRI: "PRI", # There is urgent data to read.
1519
gobject.IO_ERR: "ERR", # Error condition.
1520
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1521
# broken, usually for pipes and
1522
# sockets).
1523
}
1524
conditions_string = ' | '.join(name
1525
for cond, name in
1526
condition_names.iteritems()
1527
if cond & condition)
1528
# error or the other end of multiprocessing.Pipe has closed
1529
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2042
1530
return False
2043
1531
2044
1532
# Read a request from the child
2049
1537
fpr = request[1]
2050
1538
address = request[2]
2051
1539
2052
for c in self.clients.itervalues():
1540
for c in self.clients:
2053
1541
if c.fingerprint == fpr:
2054
1542
client = c
2055
1543
break
2056
1544
else:
2057
logger.info("Client not found for fingerprint: %s, ad"
2058
"dress: %s", fpr, address)
1545
logger.warning("Client not found for fingerprint: %s, ad"
1546
"dress: %s", fpr, address)
2059
1547
if self.use_dbus:
2060
1548
# Emit D-Bus signal
2061
mandos_dbus_service.ClientNotFound(fpr,
2062
address[0])
1549
mandos_dbus_service.ClientNotFound(fpr, address[0])
2063
1550
parent_pipe.send(False)
2064
1551
return False
2065
1552
2066
1553
gobject.io_add_watch(parent_pipe.fileno(),
2067
1554
gobject.IO_IN | gobject.IO_HUP,
2068
1555
functools.partial(self.handle_ipc,
2069
parent_pipe =
2070
parent_pipe,
2071
proc = proc,
2072
client_object =
2073
client))
1556
parent_pipe = parent_pipe,
1557
client_object = client))
2074
1558
parent_pipe.send(True)
2075
# remove the old hook in favor of the new above hook on
2076
# same fileno
1559
# remove the old hook in favor of the new above hook on same fileno
2077
1560
return False
2078
1561
if command == 'funcall':
2079
1562
funcname = request[1]
2080
1563
args = request[2]
2081
1564
kwargs = request[3]
2082
1565
2083
parent_pipe.send(('data', getattr(client_object,
2084
funcname)(*args,
2085
**kwargs)))
2086
1566
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1567
2087
1568
if command == 'getattr':
2088
1569
attrname = request[1]
2089
1570
if callable(client_object.__getattribute__(attrname)):
2090
1571
parent_pipe.send(('function',))
2091
1572
else:
2092
parent_pipe.send(('data', client_object
2093
.__getattribute__(attrname)))
1573
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2094
1574
2095
1575
if command == 'setattr':
2096
1576
attrname = request[1]
2097
1577
value = request[2]
2098
1578
setattr(client_object, attrname, value)
2099
1579
2100
1580
return True
2101
1581
2102
1582
2103
def rfc3339_duration_to_delta(duration):
2104
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2105
2106
>>> rfc3339_duration_to_delta("P7D")
2107
datetime.timedelta(7)
2108
>>> rfc3339_duration_to_delta("PT60S")
2109
datetime.timedelta(0, 60)
2110
>>> rfc3339_duration_to_delta("PT60M")
2111
datetime.timedelta(0, 3600)
2112
>>> rfc3339_duration_to_delta("PT24H")
2113
datetime.timedelta(1)
2114
>>> rfc3339_duration_to_delta("P1W")
2115
datetime.timedelta(7)
2116
>>> rfc3339_duration_to_delta("PT5M30S")
2117
datetime.timedelta(0, 330)
2118
>>> rfc3339_duration_to_delta("P1DT3M20S")
2119
datetime.timedelta(1, 200)
2120
"""
2121
2122
# Parsing an RFC 3339 duration with regular expressions is not
2123
# possible - there would have to be multiple places for the same
2124
# values, like seconds. The current code, while more esoteric, is
2125
# cleaner without depending on a parsing library. If Python had a
2126
# built-in library for parsing we would use it, but we'd like to
2127
# avoid excessive use of external libraries.
2128
2129
# New type for defining tokens, syntax, and semantics all-in-one
2130
Token = collections.namedtuple("Token",
2131
("regexp", # To match token; if
2132
# "value" is not None,
2133
# must have a "group"
2134
# containing digits
2135
"value", # datetime.timedelta or
2136
# None
2137
"followers")) # Tokens valid after
2138
# this token
2139
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2140
# the "duration" ABNF definition in RFC 3339, Appendix A.
2141
token_end = Token(re.compile(r"$"), None, frozenset())
2142
token_second = Token(re.compile(r"(\d+)S"),
2143
datetime.timedelta(seconds=1),
2144
frozenset((token_end,)))
2145
token_minute = Token(re.compile(r"(\d+)M"),
2146
datetime.timedelta(minutes=1),
2147
frozenset((token_second, token_end)))
2148
token_hour = Token(re.compile(r"(\d+)H"),
2149
datetime.timedelta(hours=1),
2150
frozenset((token_minute, token_end)))
2151
token_time = Token(re.compile(r"T"),
2152
None,
2153
frozenset((token_hour, token_minute,
2154
token_second)))
2155
token_day = Token(re.compile(r"(\d+)D"),
2156
datetime.timedelta(days=1),
2157
frozenset((token_time, token_end)))
2158
token_month = Token(re.compile(r"(\d+)M"),
2159
datetime.timedelta(weeks=4),
2160
frozenset((token_day, token_end)))
2161
token_year = Token(re.compile(r"(\d+)Y"),
2162
datetime.timedelta(weeks=52),
2163
frozenset((token_month, token_end)))
2164
token_week = Token(re.compile(r"(\d+)W"),
2165
datetime.timedelta(weeks=1),
2166
frozenset((token_end,)))
2167
token_duration = Token(re.compile(r"P"), None,
2168
frozenset((token_year, token_month,
2169
token_day, token_time,
2170
token_week)))
2171
# Define starting values
2172
value = datetime.timedelta() # Value so far
2173
found_token = None
2174
followers = frozenset((token_duration,)) # Following valid tokens
2175
s = duration # String left to parse
2176
# Loop until end token is found
2177
while found_token is not token_end:
2178
# Search for any currently valid tokens
2179
for token in followers:
2180
match = token.regexp.match(s)
2181
if match is not None:
2182
# Token found
2183
if token.value is not None:
2184
# Value found, parse digits
2185
factor = int(match.group(1), 10)
2186
# Add to value so far
2187
value += factor * token.value
2188
# Strip token from string
2189
s = token.regexp.sub("", s, 1)
2190
# Go to found token
2191
found_token = token
2192
# Set valid next tokens
2193
followers = found_token.followers
2194
break
2195
else:
2196
# No currently valid tokens were found
2197
raise ValueError("Invalid RFC 3339 duration")
2198
# End token found
2199
return value
2200
2201
2202
1583
def string_to_delta(interval):
2203
1584
"""Parse a string and return a datetime.timedelta
2204
1585
2215
1596
>>> string_to_delta('5m 30s')
2216
1597
datetime.timedelta(0, 330)
2217
1598
"""
2218
2219
try:
2220
return rfc3339_duration_to_delta(interval)
2221
except ValueError:
2222
pass
2223
2224
1599
timevalue = datetime.timedelta(0)
2225
1600
for s in interval.split():
2226
1601
try:
2227
suffix = s[-1]
1602
suffix = unicode(s[-1])
2228
1603
value = int(s[:-1])
2229
1604
if suffix == "d":
2230
1605
delta = datetime.timedelta(value)
2237
1612
elif suffix == "w":
2238
1613
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2239
1614
else:
2240
raise ValueError("Unknown suffix {!r}"
2241
.format(suffix))
2242
except IndexError as e:
1615
raise ValueError("Unknown suffix %r" % suffix)
1616
except (ValueError, IndexError), e:
2243
1617
raise ValueError(*(e.args))
2244
1618
timevalue += delta
2245
1619
return timevalue
2246
1620
2247
1621
1622
def if_nametoindex(interface):
1623
"""Call the C function if_nametoindex(), or equivalent
1624
1625
Note: This function cannot accept a unicode string."""
1626
global if_nametoindex
1627
try:
1628
if_nametoindex = (ctypes.cdll.LoadLibrary
1629
(ctypes.util.find_library("c"))
1630
.if_nametoindex)
1631
except (OSError, AttributeError):
1632
logger.warning("Doing if_nametoindex the hard way")
1633
def if_nametoindex(interface):
1634
"Get an interface index the hard way, i.e. using fcntl()"
1635
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1636
with contextlib.closing(socket.socket()) as s:
1637
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1638
struct.pack(str("16s16x"),
1639
interface))
1640
interface_index = struct.unpack(str("I"),
1641
ifreq[16:20])[0]
1642
return interface_index
1643
return if_nametoindex(interface)
1644
1645
2248
1646
def daemon(nochdir = False, noclose = False):
2249
1647
"""See daemon(3). Standard BSD Unix function.
2250
1648
2258
1656
sys.exit()
2259
1657
if not noclose:
2260
1658
# Close all standard open file descriptors
2261
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1659
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2262
1660
if not stat.S_ISCHR(os.fstat(null).st_mode):
2263
raise OSError(errno.ENODEV, "{} not a character device"
2264
.format(os.devnull))
1661
raise OSError(errno.ENODEV,
1662
"%s not a character device"
1663
% os.path.devnull)
2265
1664
os.dup2(null, sys.stdin.fileno())
2266
1665
os.dup2(null, sys.stdout.fileno())
2267
1666
os.dup2(null, sys.stderr.fileno())
2274
1673
##################################################################
2275
1674
# Parsing of options, both command line and config file
2276
1675
2277
parser = argparse.ArgumentParser()
2278
parser.add_argument("-v", "--version", action="version",
2279
version = "%(prog)s {}".format(version),
2280
help="show version number and exit")
2281
parser.add_argument("-i", "--interface", metavar="IF",
2282
help="Bind to interface IF")
2283
parser.add_argument("-a", "--address",
2284
help="Address to listen for requests on")
2285
parser.add_argument("-p", "--port", type=int,
2286
help="Port number to receive requests on")
2287
parser.add_argument("--check", action="store_true",
2288
help="Run self-test")
2289
parser.add_argument("--debug", action="store_true",
2290
help="Debug mode; run in foreground and log"
2291
" to terminal", default=None)
2292
parser.add_argument("--debuglevel", metavar="LEVEL",
2293
help="Debug level for stdout output")
2294
parser.add_argument("--priority", help="GnuTLS"
2295
" priority string (see GnuTLS documentation)")
2296
parser.add_argument("--servicename",
2297
metavar="NAME", help="Zeroconf service name")
2298
parser.add_argument("--configdir",
2299
default="/etc/mandos", metavar="DIR",
2300
help="Directory to search for configuration"
2301
" files")
2302
parser.add_argument("--no-dbus", action="store_false",
2303
dest="use_dbus", help="Do not provide D-Bus"
2304
" system bus interface", default=None)
2305
parser.add_argument("--no-ipv6", action="store_false",
2306
dest="use_ipv6", help="Do not use IPv6",
2307
default=None)
2308
parser.add_argument("--no-restore", action="store_false",
2309
dest="restore", help="Do not restore stored"
2310
" state", default=None)
2311
parser.add_argument("--socket", type=int,
2312
help="Specify a file descriptor to a network"
2313
" socket to use instead of creating one")
2314
parser.add_argument("--statedir", metavar="DIR",
2315
help="Directory to save/restore state in")
2316
parser.add_argument("--foreground", action="store_true",
2317
help="Run in foreground", default=None)
2318
parser.add_argument("--no-zeroconf", action="store_false",
2319
dest="zeroconf", help="Do not use Zeroconf",
2320
default=None)
2321
2322
options = parser.parse_args()
1676
parser = optparse.OptionParser(version = "%%prog %s" % version)
1677
parser.add_option("-i", "--interface", type="string",
1678
metavar="IF", help="Bind to interface IF")
1679
parser.add_option("-a", "--address", type="string",
1680
help="Address to listen for requests on")
1681
parser.add_option("-p", "--port", type="int",
1682
help="Port number to receive requests on")
1683
parser.add_option("--check", action="store_true",
1684
help="Run self-test")
1685
parser.add_option("--debug", action="store_true",
1686
help="Debug mode; run in foreground and log to"
1687
" terminal")
1688
parser.add_option("--debuglevel", type="string", metavar="LEVEL",
1689
help="Debug level for stdout output")
1690
parser.add_option("--priority", type="string", help="GnuTLS"
1691
" priority string (see GnuTLS documentation)")
1692
parser.add_option("--servicename", type="string",
1693
metavar="NAME", help="Zeroconf service name")
1694
parser.add_option("--configdir", type="string",
1695
default="/etc/mandos", metavar="DIR",
1696
help="Directory to search for configuration"
1697
" files")
1698
parser.add_option("--no-dbus", action="store_false",
1699
dest="use_dbus", help="Do not provide D-Bus"
1700
" system bus interface")
1701
parser.add_option("--no-ipv6", action="store_false",
1702
dest="use_ipv6", help="Do not use IPv6")
1703
options = parser.parse_args()[0]
2323
1704
2324
1705
if options.check:
2325
1706
import doctest
2326
fail_count, test_count = doctest.testmod()
2327
sys.exit(os.EX_OK if fail_count == 0 else 1)
1707
doctest.testmod()
1708
sys.exit()
2328
1709
2329
1710
# Default values for config file for server-global settings
2330
1711
server_defaults = { "interface": "",
2332
1713
"port": "",
2333
1714
"debug": "False",
2334
1715
"priority":
2335
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1716
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2336
1717
"servicename": "Mandos",
2337
1718
"use_dbus": "True",
2338
1719
"use_ipv6": "True",
2339
1720
"debuglevel": "",
2340
"restore": "True",
2341
"socket": "",
2342
"statedir": "/var/lib/mandos",
2343
"foreground": "False",
2344
"zeroconf": "True",
2345
1721
}
2346
1722
2347
1723
# Parse config file for server-global settings
2352
1728
# Convert the SafeConfigParser object to a dict
2353
1729
server_settings = server_config.defaults()
2354
1730
# Use the appropriate methods on the non-string config options
2355
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1731
for option in ("debug", "use_dbus", "use_ipv6"):
2356
1732
server_settings[option] = server_config.getboolean("DEFAULT",
2357
1733
option)
2358
1734
if server_settings["port"]:
2359
1735
server_settings["port"] = server_config.getint("DEFAULT",
2360
1736
"port")
2361
if server_settings["socket"]:
2362
server_settings["socket"] = server_config.getint("DEFAULT",
2363
"socket")
2364
# Later, stdin will, and stdout and stderr might, be dup'ed
2365
# over with an opened os.devnull. But we don't want this to
2366
# happen with a supplied network socket.
2367
if 0 <= server_settings["socket"] <= 2:
2368
server_settings["socket"] = os.dup(server_settings
2369
["socket"])
2370
1737
del server_config
2371
1738
2372
1739
# Override the settings from the config file with command line
2373
1740
# options, if set.
2374
1741
for option in ("interface", "address", "port", "debug",
2375
1742
"priority", "servicename", "configdir",
2376
"use_dbus", "use_ipv6", "debuglevel", "restore",
2377
"statedir", "socket", "foreground", "zeroconf"):
1743
"use_dbus", "use_ipv6", "debuglevel"):
2378
1744
value = getattr(options, option)
2379
1745
if value is not None:
2380
1746
server_settings[option] = value
2381
1747
del options
2382
1748
# Force all strings to be unicode
2383
1749
for option in server_settings.keys():
2384
if isinstance(server_settings[option], bytes):
2385
server_settings[option] = (server_settings[option]
2386
.decode("utf-8"))
2387
# Force all boolean options to be boolean
2388
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2389
"foreground", "zeroconf"):
2390
server_settings[option] = bool(server_settings[option])
2391
# Debug implies foreground
2392
if server_settings["debug"]:
2393
server_settings["foreground"] = True
1750
if type(server_settings[option]) is str:
1751
server_settings[option] = unicode(server_settings[option])
2394
1752
# Now we have our good server settings in "server_settings"
2395
1753
2396
1754
##################################################################
2397
1755
2398
if (not server_settings["zeroconf"] and
2399
not (server_settings["port"]
2400
or server_settings["socket"] != "")):
2401
parser.error("Needs port or socket to work without"
2402
" Zeroconf")
2403
2404
1756
# For convenience
2405
1757
debug = server_settings["debug"]
2406
1758
debuglevel = server_settings["debuglevel"]
2407
1759
use_dbus = server_settings["use_dbus"]
2408
1760
use_ipv6 = server_settings["use_ipv6"]
2409
stored_state_path = os.path.join(server_settings["statedir"],
2410
stored_state_file)
2411
foreground = server_settings["foreground"]
2412
zeroconf = server_settings["zeroconf"]
2413
2414
if debug:
2415
initlogger(debug, logging.DEBUG)
2416
else:
2417
if not debuglevel:
2418
initlogger(debug)
2419
else:
2420
level = getattr(logging, debuglevel.upper())
2421
initlogger(debug, level)
2422
1761
2423
1762
if server_settings["servicename"] != "Mandos":
2424
1763
syslogger.setFormatter(logging.Formatter
2425
('Mandos ({}) [%(process)d]:'
2426
' %(levelname)s: %(message)s'
2427
.format(server_settings
2428
["servicename"])))
1764
('Mandos (%s) [%%(process)d]:'
1765
' %%(levelname)s: %%(message)s'
1766
% server_settings["servicename"]))
2429
1767
2430
1768
# Parse config file with clients
2431
client_config = configparser.SafeConfigParser(Client
2432
.client_defaults)
1769
client_defaults = { "timeout": "1h",
1770
"interval": "5m",
1771
"checker": "fping -q -- %%(host)s",
1772
"host": "",
1773
"approval_delay": "0s",
1774
"approval_duration": "1s",
1775
}
1776
client_config = configparser.SafeConfigParser(client_defaults)
2433
1777
client_config.read(os.path.join(server_settings["configdir"],
2434
1778
"clients.conf"))
2435
1779
2436
1780
global mandos_dbus_service
2437
1781
mandos_dbus_service = None
2438
1782
2439
socketfd = None
2440
if server_settings["socket"] != "":
2441
socketfd = server_settings["socket"]
2442
1783
tcp_server = MandosServer((server_settings["address"],
2443
1784
server_settings["port"]),
2444
1785
ClientHandler,
2447
1788
use_ipv6=use_ipv6,
2448
1789
gnutls_priority=
2449
1790
server_settings["priority"],
2450
use_dbus=use_dbus,
2451
socketfd=socketfd)
2452
if not foreground:
2453
pidfilename = "/run/mandos.pid"
2454
if not os.path.isdir("/run/."):
2455
pidfilename = "/var/run/mandos.pid"
2456
pidfile = None
1791
use_dbus=use_dbus)
1792
if not debug:
1793
pidfilename = "/var/run/mandos.pid"
2457
1794
try:
2458
1795
pidfile = open(pidfilename, "w")
2459
except IOError as e:
2460
logger.error("Could not open file %r", pidfilename,
2461
exc_info=e)
1796
except IOError:
1797
logger.error("Could not open file %r", pidfilename)
2462
1798
2463
for name in ("_mandos", "mandos", "nobody"):
1799
try:
1800
uid = pwd.getpwnam("_mandos").pw_uid
1801
gid = pwd.getpwnam("_mandos").pw_gid
1802
except KeyError:
2464
1803
try:
2465
uid = pwd.getpwnam(name).pw_uid
2466
gid = pwd.getpwnam(name).pw_gid
2467
break
1804
uid = pwd.getpwnam("mandos").pw_uid
1805
gid = pwd.getpwnam("mandos").pw_gid
2468
1806
except KeyError:
2469
continue
2470
else:
2471
uid = 65534
2472
gid = 65534
1807
try:
1808
uid = pwd.getpwnam("nobody").pw_uid
1809
gid = pwd.getpwnam("nobody").pw_gid
1810
except KeyError:
1811
uid = 65534
1812
gid = 65534
2473
1813
try:
2474
1814
os.setgid(gid)
2475
1815
os.setuid(uid)
2476
except OSError as error:
2477
if error.errno != errno.EPERM:
2478
raise
1816
except OSError, error:
1817
if error[0] != errno.EPERM:
1818
raise error
2479
1819
1820
if not debug and not debuglevel:
1821
syslogger.setLevel(logging.WARNING)
1822
console.setLevel(logging.WARNING)
1823
if debuglevel:
1824
level = getattr(logging, debuglevel.upper())
1825
syslogger.setLevel(level)
1826
console.setLevel(level)
1827
2480
1828
if debug:
2481
1829
# Enable all possible GnuTLS debugging
2482
1830
2492
1840
.gnutls_global_set_log_function(debug_gnutls))
2493
1841
2494
1842
# Redirect stdin so all checkers get /dev/null
2495
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1843
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2496
1844
os.dup2(null, sys.stdin.fileno())
2497
1845
if null > 2:
2498
1846
os.close(null)
1847
else:
1848
# No console logging
1849
logger.removeHandler(console)
2499
1850
2500
1851
# Need to fork before connecting to D-Bus
2501
if not foreground:
1852
if not debug:
2502
1853
# Close all input and output, do double fork, etc.
2503
1854
daemon()
2504
1855
2505
# multiprocessing will use threads, so before we use gobject we
2506
# need to inform gobject that threads will be used.
2507
gobject.threads_init()
2508
2509
1856
global main_loop
2510
1857
# From the Avahi example code
2511
DBusGMainLoop(set_as_default=True)
1858
DBusGMainLoop(set_as_default=True )
2512
1859
main_loop = gobject.MainLoop()
2513
1860
bus = dbus.SystemBus()
2514
1861
# End of Avahi example code
2515
1862
if use_dbus:
2516
1863
try:
2517
bus_name = dbus.service.BusName("se.recompile.Mandos",
1864
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
2518
1865
bus, do_not_queue=True)
2519
old_bus_name = (dbus.service.BusName
2520
("se.bsnet.fukt.Mandos", bus,
2521
do_not_queue=True))
2522
except dbus.exceptions.NameExistsException as e:
2523
logger.error("Disabling D-Bus:", exc_info=e)
1866
except dbus.exceptions.NameExistsException, e:
1867
logger.error(unicode(e) + ", disabling D-Bus")
2524
1868
use_dbus = False
2525
1869
server_settings["use_dbus"] = False
2526
1870
tcp_server.use_dbus = False
2527
if zeroconf:
2528
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2529
service = AvahiServiceToSyslog(name =
2530
server_settings["servicename"],
2531
servicetype = "_mandos._tcp",
2532
protocol = protocol, bus = bus)
2533
if server_settings["interface"]:
2534
service.interface = (if_nametoindex
2535
(server_settings["interface"]
2536
.encode("utf-8")))
1871
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1872
service = AvahiService(name = server_settings["servicename"],
1873
servicetype = "_mandos._tcp",
1874
protocol = protocol, bus = bus)
1875
if server_settings["interface"]:
1876
service.interface = (if_nametoindex
1877
(str(server_settings["interface"])))
2537
1878
2538
1879
global multiprocessing_manager
2539
1880
multiprocessing_manager = multiprocessing.Manager()
2541
1882
client_class = Client
2542
1883
if use_dbus:
2543
1884
client_class = functools.partial(ClientDBus, bus = bus)
2544
2545
client_settings = Client.config_parser(client_config)
2546
old_client_settings = {}
2547
clients_data = {}
2548
2549
# This is used to redirect stdout and stderr for checker processes
2550
global wnull
2551
wnull = open(os.devnull, "w") # A writable /dev/null
2552
# Only used if server is running in foreground but not in debug
2553
# mode
2554
if debug or not foreground:
2555
wnull.close()
2556
2557
# Get client data and settings from last running state.
2558
if server_settings["restore"]:
2559
try:
2560
with open(stored_state_path, "rb") as stored_state:
2561
clients_data, old_client_settings = (pickle.load
2562
(stored_state))
2563
os.remove(stored_state_path)
2564
except IOError as e:
2565
if e.errno == errno.ENOENT:
2566
logger.warning("Could not load persistent state: {}"
2567
.format(os.strerror(e.errno)))
2568
else:
2569
logger.critical("Could not load persistent state:",
2570
exc_info=e)
2571
raise
2572
except EOFError as e:
2573
logger.warning("Could not load persistent state: "
2574
"EOFError:", exc_info=e)
2575
2576
with PGPEngine() as pgp:
2577
for client_name, client in clients_data.items():
2578
# Skip removed clients
2579
if client_name not in client_settings:
2580
continue
2581
2582
# Decide which value to use after restoring saved state.
2583
# We have three different values: Old config file,
2584
# new config file, and saved state.
2585
# New config value takes precedence if it differs from old
2586
# config value, otherwise use saved state.
2587
for name, value in client_settings[client_name].items():
2588
try:
2589
# For each value in new config, check if it
2590
# differs from the old config value (Except for
2591
# the "secret" attribute)
2592
if (name != "secret" and
2593
value != old_client_settings[client_name]
2594
[name]):
2595
client[name] = value
2596
except KeyError:
2597
pass
2598
2599
# Clients who has passed its expire date can still be
2600
# enabled if its last checker was successful. Clients
2601
# whose checker succeeded before we stored its state is
2602
# assumed to have successfully run all checkers during
2603
# downtime.
2604
if client["enabled"]:
2605
if datetime.datetime.utcnow() >= client["expires"]:
2606
if not client["last_checked_ok"]:
2607
logger.warning(
2608
"disabling client {} - Client never "
2609
"performed a successful checker"
2610
.format(client_name))
2611
client["enabled"] = False
2612
elif client["last_checker_status"] != 0:
2613
logger.warning(
2614
"disabling client {} - Client last"
2615
" checker failed with error code {}"
2616
.format(client_name,
2617
client["last_checker_status"]))
2618
client["enabled"] = False
2619
else:
2620
client["expires"] = (datetime.datetime
2621
.utcnow()
2622
+ client["timeout"])
2623
logger.debug("Last checker succeeded,"
2624
" keeping {} enabled"
2625
.format(client_name))
1885
def client_config_items(config, section):
1886
special_settings = {
1887
"approved_by_default":
1888
lambda: config.getboolean(section,
1889
"approved_by_default"),
1890
}
1891
for name, value in config.items(section):
2626
1892
try:
2627
client["secret"] = (
2628
pgp.decrypt(client["encrypted_secret"],
2629
client_settings[client_name]
2630
["secret"]))
2631
except PGPError:
2632
# If decryption fails, we use secret from new settings
2633
logger.debug("Failed to decrypt {} old secret"
2634
.format(client_name))
2635
client["secret"] = (
2636
client_settings[client_name]["secret"])
2637
2638
# Add/remove clients based on new changes made to config
2639
for client_name in (set(old_client_settings)
2640
- set(client_settings)):
2641
del clients_data[client_name]
2642
for client_name in (set(client_settings)
2643
- set(old_client_settings)):
2644
clients_data[client_name] = client_settings[client_name]
2645
2646
# Create all client objects
2647
for client_name, client in clients_data.items():
2648
tcp_server.clients[client_name] = client_class(
2649
name = client_name, settings = client,
2650
server_settings = server_settings)
2651
1893
yield (name, special_settings[name]())
1894
except KeyError:
1895
yield (name, value)
1896
1897
tcp_server.clients.update(set(
1898
client_class(name = section,
1899
config= dict(client_config_items(
1900
client_config, section)))
1901
for section in client_config.sections()))
2652
1902
if not tcp_server.clients:
2653
1903
logger.warning("No clients defined")
2654
2655
if not foreground:
2656
if pidfile is not None:
2657
try:
2658
with pidfile:
2659
pid = os.getpid()
2660
pidfile.write("{}\n".format(pid).encode("utf-8"))
2661
except IOError:
2662
logger.error("Could not write to file %r with PID %d",
2663
pidfilename, pid)
2664
del pidfile
1904
1905
if not debug:
1906
try:
1907
with pidfile:
1908
pid = os.getpid()
1909
pidfile.write(str(pid) + "\n".encode("utf-8"))
1910
del pidfile
1911
except IOError:
1912
logger.error("Could not write to file %r with PID %d",
1913
pidfilename, pid)
1914
except NameError:
1915
# "pidfile" was never created
1916
pass
2665
1917
del pidfilename
2666
1918
1919
signal.signal(signal.SIGINT, signal.SIG_IGN)
1920
2667
1921
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2668
1922
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2669
1923
2670
1924
if use_dbus:
2671
@alternate_dbus_interfaces({"se.recompile.Mandos":
2672
"se.bsnet.fukt.Mandos"})
2673
class MandosDBusService(DBusObjectWithProperties):
1925
class MandosDBusService(dbus.service.Object):
2674
1926
"""A D-Bus proxy object"""
2675
1927
def __init__(self):
2676
1928
dbus.service.Object.__init__(self, bus, "/")
2677
_interface = "se.recompile.Mandos"
2678
2679
@dbus_interface_annotations(_interface)
2680
def _foo(self):
2681
return { "org.freedesktop.DBus.Property"
2682
".EmitsChangedSignal":
2683
"false"}
1929
_interface = "se.bsnet.fukt.Mandos"
2684
1930
2685
1931
@dbus.service.signal(_interface, signature="o")
2686
1932
def ClientAdded(self, objpath):
2701
1947
def GetAllClients(self):
2702
1948
"D-Bus method"
2703
1949
return dbus.Array(c.dbus_object_path
2704
for c in
2705
tcp_server.clients.itervalues())
1950
for c in tcp_server.clients)
2706
1951
2707
1952
@dbus.service.method(_interface,
2708
1953
out_signature="a{oa{sv}}")
2710
1955
"D-Bus method"
2711
1956
return dbus.Dictionary(
2712
1957
((c.dbus_object_path, c.GetAll(""))
2713
for c in tcp_server.clients.itervalues()),
1958
for c in tcp_server.clients),
2714
1959
signature="oa{sv}")
2715
1960
2716
1961
@dbus.service.method(_interface, in_signature="o")
2717
1962
def RemoveClient(self, object_path):
2718
1963
"D-Bus method"
2719
for c in tcp_server.clients.itervalues():
1964
for c in tcp_server.clients:
2720
1965
if c.dbus_object_path == object_path:
2721
del tcp_server.clients[c.name]
1966
tcp_server.clients.remove(c)
2722
1967
c.remove_from_connection()
2723
1968
# Don't signal anything except ClientRemoved
2724
1969
c.disable(quiet=True)
2733
1978
2734
1979
def cleanup():
2735
1980
"Cleanup function; run on exit"
2736
if zeroconf:
2737
service.cleanup()
2738
2739
multiprocessing.active_children()
2740
wnull.close()
2741
if not (tcp_server.clients or client_settings):
2742
return
2743
2744
# Store client before exiting. Secrets are encrypted with key
2745
# based on what config file has. If config file is
2746
# removed/edited, old secret will thus be unrecovable.
2747
clients = {}
2748
with PGPEngine() as pgp:
2749
for client in tcp_server.clients.itervalues():
2750
key = client_settings[client.name]["secret"]
2751
client.encrypted_secret = pgp.encrypt(client.secret,
2752
key)
2753
client_dict = {}
2754
2755
# A list of attributes that can not be pickled
2756
# + secret.
2757
exclude = { "bus", "changedstate", "secret",
2758
"checker", "server_settings" }
2759
for name, typ in (inspect.getmembers
2760
(dbus.service.Object)):
2761
exclude.add(name)
2762
2763
client_dict["encrypted_secret"] = (client
2764
.encrypted_secret)
2765
for attr in client.client_structure:
2766
if attr not in exclude:
2767
client_dict[attr] = getattr(client, attr)
2768
2769
clients[client.name] = client_dict
2770
del client_settings[client.name]["secret"]
2771
2772
try:
2773
with (tempfile.NamedTemporaryFile
2774
(mode='wb', suffix=".pickle", prefix='clients-',
2775
dir=os.path.dirname(stored_state_path),
2776
delete=False)) as stored_state:
2777
pickle.dump((clients, client_settings), stored_state)
2778
tempname=stored_state.name
2779
os.rename(tempname, stored_state_path)
2780
except (IOError, OSError) as e:
2781
if not debug:
2782
try:
2783
os.remove(tempname)
2784
except NameError:
2785
pass
2786
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2787
logger.warning("Could not save persistent state: {}"
2788
.format(os.strerror(e.errno)))
2789
else:
2790
logger.warning("Could not save persistent state:",
2791
exc_info=e)
2792
raise
2793
2794
# Delete all clients, and settings from config
1981
service.cleanup()
1982
2795
1983
while tcp_server.clients:
2796
name, client = tcp_server.clients.popitem()
1984
client = tcp_server.clients.pop()
2797
1985
if use_dbus:
2798
1986
client.remove_from_connection()
1987
client.disable_hook = None
2799
1988
# Don't signal anything except ClientRemoved
2800
1989
client.disable(quiet=True)
2801
1990
if use_dbus:
2802
1991
# Emit D-Bus signal
2803
mandos_dbus_service.ClientRemoved(client
2804
.dbus_object_path,
1992
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2805
1993
client.name)
2806
client_settings.clear()
2807
1994
2808
1995
atexit.register(cleanup)
2809
1996
2810
for client in tcp_server.clients.itervalues():
1997
for client in tcp_server.clients:
2811
1998
if use_dbus:
2812
1999
# Emit D-Bus signal
2813
2000
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2814
# Need to initiate checking of clients
2815
if client.enabled:
2816
client.init_checker()
2001
client.enable()
2817
2002
2818
2003
tcp_server.enable()
2819
2004
tcp_server.server_activate()
2820
2005
2821
2006
# Find out what port we got
2822
if zeroconf:
2823
service.port = tcp_server.socket.getsockname()[1]
2007
service.port = tcp_server.socket.getsockname()[1]
2824
2008
if use_ipv6:
2825
2009
logger.info("Now listening on address %r, port %d,"
2826
" flowinfo %d, scope_id %d",
2827
*tcp_server.socket.getsockname())
2010
" flowinfo %d, scope_id %d"
2011
% tcp_server.socket.getsockname())
2828
2012
else: # IPv4
2829
logger.info("Now listening on address %r, port %d",
2830
*tcp_server.socket.getsockname())
2013
logger.info("Now listening on address %r, port %d"
2014
% tcp_server.socket.getsockname())
2831
2015
2832
2016
#service.interface = tcp_server.socket.getsockname()[3]
2833
2017
2834
2018
try:
2835
if zeroconf:
2836
# From the Avahi example code
2837
try:
2838
service.activate()
2839
except dbus.exceptions.DBusException as error:
2840
logger.critical("D-Bus Exception", exc_info=error)
2841
cleanup()
2842
sys.exit(1)
2843
# End of Avahi example code
2019
# From the Avahi example code
2020
try:
2021
service.activate()
2022
except dbus.exceptions.DBusException, error:
2023
logger.critical("DBusException: %s", error)
2024
cleanup()
2025
sys.exit(1)
2026
# End of Avahi example code
2844
2027
2845
2028
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2846
2029
lambda *args, **kwargs:
2849
2032
2850
2033
logger.debug("Starting main loop")
2851
2034
main_loop.run()
2852
except AvahiError as error:
2853
logger.critical("Avahi Error", exc_info=error)
2035
except AvahiError, error:
2036
logger.critical("AvahiError: %s", error)
2854
2037
cleanup()
2855
2038
sys.exit(1)
2856
2039
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0