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- Committer: Teddy Hogeborn
- Date: 2014-08-09 13:12:55 UTC
- Revision ID: teddy@recompile.se-20140809131255-lp31j98u2pl0xpe6
mandos: Stop using str() and remove unnecessary unicode() calls.
* mandos (if_nametoindex): Use "bytes" literal instead of str().
(initlogger): Use a unicode string for log device.
(AvahiError.__unicode__): Removed.
(DBusPropertyException.__unicode__): - '' -
(ClientDBus.Secret_dbus_property): Use bytes() instead of str().
(IPv6_TCPServer.server_bind): Use .encode() instead of str().
(string_to_delta): Removed unnecessary unicode() call.
(main): Use "isinstance(x, bytes)" instead of "type(x) is str", use
.decode() instead of unicode(), and use .encode() instead of
str().
* mandos (if_nametoindex): Use "bytes" literal instead of str().
(initlogger): Use a unicode string for log device.
(AvahiError.__unicode__): Removed.
(DBusPropertyException.__unicode__): - '' -
(ClientDBus.Secret_dbus_property): Use bytes() instead of str().
(IPv6_TCPServer.server_bind): Use .encode() instead of str().
(string_to_delta): Removed unnecessary unicode() call.
(main): Use "isinstance(x, bytes)" instead of "type(x) is str", use
.decode() instead of unicode(), and use .encode() instead of
str().
- files added:
- debian/mandos-client.examples
- debian/upstream
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python
1
#!/usr/bin/python2.7
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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 © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 Björn Påhlsson
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# Copyright © 2008-2014 Teddy Hogeborn
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# Copyright © 2008-2014 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@fukt.bsnet.se>.
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# Contact the authors at <mandos@recompile.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 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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import dbus
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import dbus.service
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except ImportError:
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SO_BINDTODEVICE = None
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version = "1.3.1"
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#logger = logging.getLogger('mandos')
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logger = logging.Logger('mandos')
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syslogger = (logging.handlers.SysLogHandler
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = str("/dev/log")))
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syslogger.setFormatter(logging.Formatter
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('Mandos [%(process)d]: %(levelname)s:'
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' %(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]:'
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' %(levelname)s:'
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' %(message)s'))
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logger.addHandler(console)
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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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try:
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if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
100
.if_nametoindex)
101
except (OSError, AttributeError):
102
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))
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interface_index = struct.unpack("I", ifreq[16:20])[0]
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return interface_index
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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
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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:'
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' %(message)s'))
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logger.addHandler(syslogger)
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if debug:
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
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' [%(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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class PGPError(Exception):
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"""Exception if encryption/decryption fails"""
137
pass
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class PGPEngine(object):
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"""A simple class for OpenPGP symmetric encryption & decryption"""
142
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):
151
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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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,
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topdown = False):
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for filename in files:
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os.remove(os.path.join(root, filename))
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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)
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self.tempdir = None
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def password_encode(self, password):
174
# Passphrase can not be empty and can not contain newlines or
175
# NUL bytes. So we prefix it and hex encode it.
176
encoded = b"mandos" + binascii.hexlify(password)
177
if len(encoded) > 2048:
178
# GnuPG can't handle long passwords, so encode differently
179
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
180
.replace(b"\n", b"\\n")
181
.replace(b"\0", b"\\x00"))
182
return encoded
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def encrypt(self, data, password):
185
passphrase = self.password_encode(password)
186
with tempfile.NamedTemporaryFile(dir=self.tempdir
187
) as passfile:
188
passfile.write(passphrase)
189
passfile.flush()
190
proc = subprocess.Popen(['gpg', '--symmetric',
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'--passphrase-file',
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passfile.name]
193
+ self.gnupgargs,
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stdin = subprocess.PIPE,
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stdout = subprocess.PIPE,
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stderr = subprocess.PIPE)
197
ciphertext, err = proc.communicate(input = data)
198
if proc.returncode != 0:
199
raise PGPError(err)
200
return ciphertext
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def decrypt(self, data, password):
203
passphrase = self.password_encode(password)
204
with tempfile.NamedTemporaryFile(dir = self.tempdir
205
) as passfile:
206
passfile.write(passphrase)
207
passfile.flush()
208
proc = subprocess.Popen(['gpg', '--decrypt',
209
'--passphrase-file',
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passfile.name]
211
+ self.gnupgargs,
212
stdin = subprocess.PIPE,
213
stdout = subprocess.PIPE,
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stderr = subprocess.PIPE)
215
decrypted_plaintext, err = proc.communicate(input
216
= data)
217
if proc.returncode != 0:
218
raise PGPError(err)
219
return decrypted_plaintext
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class AvahiError(Exception):
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def __init__(self, value, *args, **kwargs):
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self.value = value
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
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return unicode(repr(self.value))
225
return super(AvahiError, self).__init__(value, *args,
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**kwargs)
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class AvahiServiceError(AvahiError):
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pass
122
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Used to optionally bind to the specified interface.
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name: string; Example: 'Mandos'
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type: string; Example: '_mandos._tcp'.
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See <http://www.dns-sd.org/ServiceTypes.html>
243
See <https://www.iana.org/assignments/service-names-port-numbers>
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port: integer; what port to announce
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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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254
"""
255
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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.server = None
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self.bus = bus
154
273
self.entry_group_state_changed_match = None
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def rename(self):
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"""Derived from the Avahi example code"""
157
277
if self.rename_count >= self.max_renames:
159
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" after %i retries, exiting.",
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self.rename_count)
161
281
raise AvahiServiceError("Too many renames")
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
282
self.name = unicode(self.server
283
.GetAlternativeServiceName(self.name))
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logger.info("Changing Zeroconf service name to %r ...",
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self.name)
165
syslogger.setFormatter(logging.Formatter
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('Mandos (%s) [%%(process)d]:'
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' %%(levelname)s: %%(message)s'
168
% self.name))
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286
self.remove()
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try:
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self.add()
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except dbus.exceptions.DBusException as error:
173
logger.critical("DBusException: %s", error)
290
logger.critical("D-Bus Exception", exc_info=error)
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self.cleanup()
175
292
os._exit(1)
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self.rename_count += 1
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177
295
def remove(self):
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"""Derived from the Avahi example code"""
179
297
if self.entry_group_state_changed_match is not None:
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299
self.entry_group_state_changed_match = None
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300
if self.group is not None:
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self.group.Reset()
302
184
303
def add(self):
185
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"""Derived from the Avahi example code"""
186
305
self.remove()
191
310
avahi.DBUS_INTERFACE_ENTRY_GROUP)
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311
self.entry_group_state_changed_match = (
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312
self.group.connect_to_signal(
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'StateChanged', self .entry_group_state_changed))
313
'StateChanged', self.entry_group_state_changed))
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logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
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315
self.name, self.type)
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self.group.AddService(
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dbus.UInt16(self.port),
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avahi.string_array_to_txt_array(self.TXT))
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self.group.Commit()
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def entry_group_state_changed(self, state, error):
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"""Derived from the Avahi example code"""
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logger.debug("Avahi entry group state change: %i", state)
215
335
elif state == avahi.ENTRY_GROUP_FAILURE:
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logger.critical("Avahi: Error in group state changed %s",
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unicode(error))
218
raise AvahiGroupError("State changed: %s"
219
% unicode(error))
338
raise AvahiGroupError("State changed: {!s}"
339
.format(error))
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220
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def cleanup(self):
221
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"""Derived from the Avahi example code"""
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343
if self.group is not None:
223
344
try:
224
345
self.group.Free()
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except (dbus.exceptions.UnknownMethodException,
226
dbus.exceptions.DBusException) as e:
347
dbus.exceptions.DBusException):
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pass
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self.group = None
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350
self.remove()
351
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def server_state_changed(self, state, error=None):
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"""Derived from the Avahi example code"""
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logger.debug("Avahi server state change: %i", state)
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373
logger.debug("Unknown state: %r", state)
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374
else:
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logger.debug("Unknown state: %r: %r", state, error)
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def activate(self):
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378
"""Derived from the Avahi example code"""
256
379
if self.server is None:
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self.server_state_changed(self.server.GetState())
265
388
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389
390
class AvahiServiceToSyslog(AvahiService):
391
def rename(self):
392
"""Add the new name to the syslog messages"""
393
ret = AvahiService.rename(self)
394
syslogger.setFormatter(logging.Formatter
395
('Mandos ({}) [%(process)d]:'
396
' %(levelname)s: %(message)s'
397
.format(self.name)))
398
return ret
399
400
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class Client(object):
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"""A representation of a client host served by this server.
269
403
270
404
Attributes:
271
_approved: bool(); 'None' if not yet approved/disapproved
405
approved: bool(); 'None' if not yet approved/disapproved
272
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approval_delay: datetime.timedelta(); Time to wait for approval
273
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approval_duration: datetime.timedelta(); Duration of one approval
274
408
checker: subprocess.Popen(); a running checker process used
281
415
instance %(name)s can be used in the command.
282
416
checker_initiator_tag: a gobject event source tag, or None
283
417
created: datetime.datetime(); (UTC) object creation
418
client_structure: Object describing what attributes a client has
419
and is used for storing the client at exit
284
420
current_checker_command: string; current running checker_command
285
disable_hook: If set, called by disable() as disable_hook(self)
286
421
disable_initiator_tag: a gobject event source tag, or None
287
422
enabled: bool()
288
423
fingerprint: string (40 or 32 hexadecimal digits); used to
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426
interval: datetime.timedelta(); How often to start a new checker
292
427
last_approval_request: datetime.datetime(); (UTC) or None
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428
last_checked_ok: datetime.datetime(); (UTC) or None
294
last_enabled: datetime.datetime(); (UTC)
429
last_checker_status: integer between 0 and 255 reflecting exit
430
status of last checker. -1 reflects crashed
431
checker, -2 means no checker completed yet.
432
last_enabled: datetime.datetime(); (UTC) or None
295
433
name: string; from the config file, used in log messages and
296
434
D-Bus identifiers
297
435
secret: bytestring; sent verbatim (over TLS) to client
298
436
timeout: datetime.timedelta(); How long from last_checked_ok
299
437
until this client is disabled
300
extended_timeout: extra long timeout when password has been sent
438
extended_timeout: extra long timeout when secret has been sent
301
439
runtime_expansions: Allowed attributes for runtime expansion.
302
440
expires: datetime.datetime(); time (UTC) when a client will be
303
441
disabled, or None
442
server_settings: The server_settings dict from main()
304
443
"""
305
444
306
445
runtime_expansions = ("approval_delay", "approval_duration",
307
"created", "enabled", "fingerprint",
308
"host", "interval", "last_checked_ok",
446
"created", "enabled", "expires",
447
"fingerprint", "host", "interval",
448
"last_approval_request", "last_checked_ok",
309
449
"last_enabled", "name", "timeout")
450
client_defaults = { "timeout": "PT5M",
451
"extended_timeout": "PT15M",
452
"interval": "PT2M",
453
"checker": "fping -q -- %%(host)s",
454
"host": "",
455
"approval_delay": "PT0S",
456
"approval_duration": "PT1S",
457
"approved_by_default": "True",
458
"enabled": "True",
459
}
310
460
311
461
@staticmethod
312
def _timedelta_to_milliseconds(td):
313
"Convert a datetime.timedelta() to milliseconds"
314
return ((td.days * 24 * 60 * 60 * 1000)
315
+ (td.seconds * 1000)
316
+ (td.microseconds // 1000))
317
318
def timeout_milliseconds(self):
319
"Return the 'timeout' attribute in milliseconds"
320
return self._timedelta_to_milliseconds(self.timeout)
321
322
def extended_timeout_milliseconds(self):
323
"Return the 'extended_timeout' attribute in milliseconds"
324
return self._timedelta_to_milliseconds(self.extended_timeout)
325
326
def interval_milliseconds(self):
327
"Return the 'interval' attribute in milliseconds"
328
return self._timedelta_to_milliseconds(self.interval)
329
330
def approval_delay_milliseconds(self):
331
return self._timedelta_to_milliseconds(self.approval_delay)
332
333
def __init__(self, name = None, disable_hook=None, config=None):
334
"""Note: the 'checker' key in 'config' sets the
335
'checker_command' attribute and *not* the 'checker'
336
attribute."""
462
def config_parser(config):
463
"""Construct a new dict of client settings of this form:
464
{ client_name: {setting_name: value, ...}, ...}
465
with exceptions for any special settings as defined above.
466
NOTE: Must be a pure function. Must return the same result
467
value given the same arguments.
468
"""
469
settings = {}
470
for client_name in config.sections():
471
section = dict(config.items(client_name))
472
client = settings[client_name] = {}
473
474
client["host"] = section["host"]
475
# Reformat values from string types to Python types
476
client["approved_by_default"] = config.getboolean(
477
client_name, "approved_by_default")
478
client["enabled"] = config.getboolean(client_name,
479
"enabled")
480
481
client["fingerprint"] = (section["fingerprint"].upper()
482
.replace(" ", ""))
483
if "secret" in section:
484
client["secret"] = section["secret"].decode("base64")
485
elif "secfile" in section:
486
with open(os.path.expanduser(os.path.expandvars
487
(section["secfile"])),
488
"rb") as secfile:
489
client["secret"] = secfile.read()
490
else:
491
raise TypeError("No secret or secfile for section {}"
492
.format(section))
493
client["timeout"] = string_to_delta(section["timeout"])
494
client["extended_timeout"] = string_to_delta(
495
section["extended_timeout"])
496
client["interval"] = string_to_delta(section["interval"])
497
client["approval_delay"] = string_to_delta(
498
section["approval_delay"])
499
client["approval_duration"] = string_to_delta(
500
section["approval_duration"])
501
client["checker_command"] = section["checker"]
502
client["last_approval_request"] = None
503
client["last_checked_ok"] = None
504
client["last_checker_status"] = -2
505
506
return settings
507
508
def __init__(self, settings, name = None, server_settings=None):
337
509
self.name = name
338
if config is None:
339
config = {}
510
if server_settings is None:
511
server_settings = {}
512
self.server_settings = server_settings
513
# adding all client settings
514
for setting, value in settings.items():
515
setattr(self, setting, value)
516
517
if self.enabled:
518
if not hasattr(self, "last_enabled"):
519
self.last_enabled = datetime.datetime.utcnow()
520
if not hasattr(self, "expires"):
521
self.expires = (datetime.datetime.utcnow()
522
+ self.timeout)
523
else:
524
self.last_enabled = None
525
self.expires = None
526
340
527
logger.debug("Creating client %r", self.name)
341
528
# Uppercase and remove spaces from fingerprint for later
342
529
# comparison purposes with return value from the fingerprint()
343
530
# function
344
self.fingerprint = (config["fingerprint"].upper()
345
.replace(" ", ""))
346
531
logger.debug(" Fingerprint: %s", self.fingerprint)
347
if "secret" in config:
348
self.secret = config["secret"].decode("base64")
349
elif "secfile" in config:
350
with open(os.path.expanduser(os.path.expandvars
351
(config["secfile"])),
352
"rb") as secfile:
353
self.secret = secfile.read()
354
else:
355
raise TypeError("No secret or secfile for client %s"
356
% self.name)
357
self.host = config.get("host", "")
358
self.created = datetime.datetime.utcnow()
359
self.enabled = False
360
self.last_approval_request = None
361
self.last_enabled = None
362
self.last_checked_ok = None
363
self.timeout = string_to_delta(config["timeout"])
364
self.extended_timeout = string_to_delta(config["extended_timeout"])
365
self.interval = string_to_delta(config["interval"])
366
self.disable_hook = disable_hook
532
self.created = settings.get("created",
533
datetime.datetime.utcnow())
534
535
# attributes specific for this server instance
367
536
self.checker = None
368
537
self.checker_initiator_tag = None
369
538
self.disable_initiator_tag = None
370
self.expires = None
371
539
self.checker_callback_tag = None
372
self.checker_command = config["checker"]
373
540
self.current_checker_command = None
374
self.last_connect = None
375
self._approved = None
376
self.approved_by_default = config.get("approved_by_default",
377
True)
541
self.approved = None
378
542
self.approvals_pending = 0
379
self.approval_delay = string_to_delta(
380
config["approval_delay"])
381
self.approval_duration = string_to_delta(
382
config["approval_duration"])
383
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
543
self.changedstate = (multiprocessing_manager
544
.Condition(multiprocessing_manager
545
.Lock()))
546
self.client_structure = [attr for attr in
547
self.__dict__.iterkeys()
548
if not attr.startswith("_")]
549
self.client_structure.append("client_structure")
550
551
for name, t in inspect.getmembers(type(self),
552
lambda obj:
553
isinstance(obj,
554
property)):
555
if not name.startswith("_"):
556
self.client_structure.append(name)
384
557
558
# Send notice to process children that client state has changed
385
559
def send_changedstate(self):
386
self.changedstate.acquire()
387
self.changedstate.notify_all()
388
self.changedstate.release()
389
560
with self.changedstate:
561
self.changedstate.notify_all()
562
390
563
def enable(self):
391
564
"""Start this client's checker and timeout hooks"""
392
565
if getattr(self, "enabled", False):
393
566
# Already enabled
394
567
return
395
self.send_changedstate()
568
self.expires = datetime.datetime.utcnow() + self.timeout
569
self.enabled = True
396
570
self.last_enabled = datetime.datetime.utcnow()
397
# Schedule a new checker to be started an 'interval' from now,
398
# and every interval from then on.
399
self.checker_initiator_tag = (gobject.timeout_add
400
(self.interval_milliseconds(),
401
self.start_checker))
402
# Schedule a disable() when 'timeout' has passed
403
self.expires = datetime.datetime.utcnow() + self.timeout
404
self.disable_initiator_tag = (gobject.timeout_add
405
(self.timeout_milliseconds(),
406
self.disable))
407
self.enabled = True
408
# Also start a new checker *right now*.
409
self.start_checker()
571
self.init_checker()
572
self.send_changedstate()
410
573
411
574
def disable(self, quiet=True):
412
575
"""Disable this client."""
413
576
if not getattr(self, "enabled", False):
414
577
return False
415
578
if not quiet:
416
self.send_changedstate()
417
if not quiet:
418
579
logger.info("Disabling client %s", self.name)
419
if getattr(self, "disable_initiator_tag", False):
580
if getattr(self, "disable_initiator_tag", None) is not None:
420
581
gobject.source_remove(self.disable_initiator_tag)
421
582
self.disable_initiator_tag = None
422
583
self.expires = None
423
if getattr(self, "checker_initiator_tag", False):
584
if getattr(self, "checker_initiator_tag", None) is not None:
424
585
gobject.source_remove(self.checker_initiator_tag)
425
586
self.checker_initiator_tag = None
426
587
self.stop_checker()
427
if self.disable_hook:
428
self.disable_hook(self)
429
588
self.enabled = False
589
if not quiet:
590
self.send_changedstate()
430
591
# Do not run this again if called by a gobject.timeout_add
431
592
return False
432
593
433
594
def __del__(self):
434
self.disable_hook = None
435
595
self.disable()
436
596
597
def init_checker(self):
598
# Schedule a new checker to be started an 'interval' from now,
599
# and every interval from then on.
600
if self.checker_initiator_tag is not None:
601
gobject.source_remove(self.checker_initiator_tag)
602
self.checker_initiator_tag = (gobject.timeout_add
603
(int(self.interval
604
.total_seconds() * 1000),
605
self.start_checker))
606
# Schedule a disable() when 'timeout' has passed
607
if self.disable_initiator_tag is not None:
608
gobject.source_remove(self.disable_initiator_tag)
609
self.disable_initiator_tag = (gobject.timeout_add
610
(int(self.timeout
611
.total_seconds() * 1000),
612
self.disable))
613
# Also start a new checker *right now*.
614
self.start_checker()
615
437
616
def checker_callback(self, pid, condition, command):
438
617
"""The checker has completed, so take appropriate actions."""
439
618
self.checker_callback_tag = None
440
619
self.checker = None
441
620
if os.WIFEXITED(condition):
442
exitstatus = os.WEXITSTATUS(condition)
443
if exitstatus == 0:
621
self.last_checker_status = os.WEXITSTATUS(condition)
622
if self.last_checker_status == 0:
444
623
logger.info("Checker for %(name)s succeeded",
445
624
vars(self))
446
625
self.checked_ok()
448
627
logger.info("Checker for %(name)s failed",
449
628
vars(self))
450
629
else:
630
self.last_checker_status = -1
451
631
logger.warning("Checker for %(name)s crashed?",
452
632
vars(self))
453
633
454
def checked_ok(self, timeout=None):
455
"""Bump up the timeout for this client.
456
457
This should only be called when the client has been seen,
458
alive and well.
459
"""
634
def checked_ok(self):
635
"""Assert that the client has been seen, alive and well."""
636
self.last_checked_ok = datetime.datetime.utcnow()
637
self.last_checker_status = 0
638
self.bump_timeout()
639
640
def bump_timeout(self, timeout=None):
641
"""Bump up the timeout for this client."""
460
642
if timeout is None:
461
643
timeout = self.timeout
462
self.last_checked_ok = datetime.datetime.utcnow()
463
gobject.source_remove(self.disable_initiator_tag)
464
self.expires = datetime.datetime.utcnow() + timeout
465
self.disable_initiator_tag = (gobject.timeout_add
466
(self._timedelta_to_milliseconds(timeout),
467
self.disable))
644
if self.disable_initiator_tag is not None:
645
gobject.source_remove(self.disable_initiator_tag)
646
self.disable_initiator_tag = None
647
if getattr(self, "enabled", False):
648
self.disable_initiator_tag = (gobject.timeout_add
649
(int(timeout.total_seconds()
650
* 1000), self.disable))
651
self.expires = datetime.datetime.utcnow() + timeout
468
652
469
653
def need_approval(self):
470
654
self.last_approval_request = datetime.datetime.utcnow()
475
659
If a checker already exists, leave it running and do
476
660
nothing."""
477
661
# The reason for not killing a running checker is that if we
478
# did that, then if a checker (for some reason) started
479
# running slowly and taking more than 'interval' time, the
480
# client would inevitably timeout, since no checker would get
481
# a chance to run to completion. If we instead leave running
662
# did that, and if a checker (for some reason) started running
663
# slowly and taking more than 'interval' time, then the client
664
# would inevitably timeout, since no checker would get a
665
# chance to run to completion. If we instead leave running
482
666
# checkers alone, the checker would have to take more time
483
667
# than 'timeout' for the client to be disabled, which is as it
484
668
# should be.
486
670
# If a checker exists, make sure it is not a zombie
487
671
try:
488
672
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
489
except (AttributeError, OSError) as error:
490
if (isinstance(error, OSError)
491
and error.errno != errno.ECHILD):
492
raise error
673
except AttributeError:
674
pass
675
except OSError as error:
676
if error.errno != errno.ECHILD:
677
raise
493
678
else:
494
679
if pid:
495
680
logger.warning("Checker was a zombie")
498
683
self.current_checker_command)
499
684
# Start a new checker if needed
500
685
if self.checker is None:
686
# Escape attributes for the shell
687
escaped_attrs = { attr:
688
re.escape(unicode(getattr(self,
689
attr)))
690
for attr in self.runtime_expansions }
501
691
try:
502
# In case checker_command has exactly one % operator
503
command = self.checker_command % self.host
504
except TypeError:
505
# Escape attributes for the shell
506
escaped_attrs = dict(
507
(attr,
508
re.escape(unicode(str(getattr(self, attr, "")),
509
errors=
510
'replace')))
511
for attr in
512
self.runtime_expansions)
513
514
try:
515
command = self.checker_command % escaped_attrs
516
except TypeError as error:
517
logger.error('Could not format string "%s":'
518
' %s', self.checker_command, error)
519
return True # Try again later
692
command = self.checker_command % escaped_attrs
693
except TypeError as error:
694
logger.error('Could not format string "%s"',
695
self.checker_command, exc_info=error)
696
return True # Try again later
520
697
self.current_checker_command = command
521
698
try:
522
699
logger.info("Starting checker %r for %s",
525
702
# in normal mode, that is already done by daemon(),
526
703
# and in debug mode we don't want to. (Stdin is
527
704
# always replaced by /dev/null.)
705
# The exception is when not debugging but nevertheless
706
# running in the foreground; use the previously
707
# created wnull.
708
popen_args = {}
709
if (not self.server_settings["debug"]
710
and self.server_settings["foreground"]):
711
popen_args.update({"stdout": wnull,
712
"stderr": wnull })
528
713
self.checker = subprocess.Popen(command,
529
714
close_fds=True,
530
shell=True, cwd="/")
531
self.checker_callback_tag = (gobject.child_watch_add
532
(self.checker.pid,
533
self.checker_callback,
534
data=command))
535
# The checker may have completed before the gobject
536
# watch was added. Check for this.
715
shell=True, cwd="/",
716
**popen_args)
717
except OSError as error:
718
logger.error("Failed to start subprocess",
719
exc_info=error)
720
return True
721
self.checker_callback_tag = (gobject.child_watch_add
722
(self.checker.pid,
723
self.checker_callback,
724
data=command))
725
# The checker may have completed before the gobject
726
# watch was added. Check for this.
727
try:
537
728
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
538
if pid:
539
gobject.source_remove(self.checker_callback_tag)
540
self.checker_callback(pid, status, command)
541
729
except OSError as error:
542
logger.error("Failed to start subprocess: %s",
543
error)
730
if error.errno == errno.ECHILD:
731
# This should never happen
732
logger.error("Child process vanished",
733
exc_info=error)
734
return True
735
raise
736
if pid:
737
gobject.source_remove(self.checker_callback_tag)
738
self.checker_callback(pid, status, command)
544
739
# Re-run this periodically if run by gobject.timeout_add
545
740
return True
546
741
553
748
return
554
749
logger.debug("Stopping checker for %(name)s", vars(self))
555
750
try:
556
os.kill(self.checker.pid, signal.SIGTERM)
751
self.checker.terminate()
557
752
#time.sleep(0.5)
558
753
#if self.checker.poll() is None:
559
# os.kill(self.checker.pid, signal.SIGKILL)
754
# self.checker.kill()
560
755
except OSError as error:
561
756
if error.errno != errno.ESRCH: # No such process
562
757
raise
563
758
self.checker = None
564
759
760
565
761
def dbus_service_property(dbus_interface, signature="v",
566
762
access="readwrite", byte_arrays=False):
567
763
"""Decorators for marking methods of a DBusObjectWithProperties to
578
774
# "Set" method, so we fail early here:
579
775
if byte_arrays and signature != "ay":
580
776
raise ValueError("Byte arrays not supported for non-'ay'"
581
" signature %r" % signature)
777
" signature {!r}".format(signature))
582
778
def decorator(func):
583
779
func._dbus_is_property = True
584
780
func._dbus_interface = dbus_interface
592
788
return decorator
593
789
594
790
791
def dbus_interface_annotations(dbus_interface):
792
"""Decorator for marking functions returning interface annotations
793
794
Usage:
795
796
@dbus_interface_annotations("org.example.Interface")
797
def _foo(self): # Function name does not matter
798
return {"org.freedesktop.DBus.Deprecated": "true",
799
"org.freedesktop.DBus.Property.EmitsChangedSignal":
800
"false"}
801
"""
802
def decorator(func):
803
func._dbus_is_interface = True
804
func._dbus_interface = dbus_interface
805
func._dbus_name = dbus_interface
806
return func
807
return decorator
808
809
810
def dbus_annotations(annotations):
811
"""Decorator to annotate D-Bus methods, signals or properties
812
Usage:
813
814
@dbus_service_property("org.example.Interface", signature="b",
815
access="r")
816
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
817
"org.freedesktop.DBus.Property."
818
"EmitsChangedSignal": "false"})
819
def Property_dbus_property(self):
820
return dbus.Boolean(False)
821
"""
822
def decorator(func):
823
func._dbus_annotations = annotations
824
return func
825
return decorator
826
827
595
828
class DBusPropertyException(dbus.exceptions.DBusException):
596
829
"""A base class for D-Bus property-related exceptions
597
830
"""
598
def __unicode__(self):
599
return unicode(str(self))
600
831
pass
601
832
602
833
class DBusPropertyAccessException(DBusPropertyException):
603
834
"""A property's access permissions disallows an operation.
613
844
614
845
class DBusObjectWithProperties(dbus.service.Object):
615
846
"""A D-Bus object with properties.
616
847
617
848
Classes inheriting from this can use the dbus_service_property
618
849
decorator to expose methods as D-Bus properties. It exposes the
619
850
standard Get(), Set(), and GetAll() methods on the D-Bus.
620
851
"""
621
852
622
853
@staticmethod
623
def _is_dbus_property(obj):
624
return getattr(obj, "_dbus_is_property", False)
854
def _is_dbus_thing(thing):
855
"""Returns a function testing if an attribute is a D-Bus thing
856
857
If called like _is_dbus_thing("method") it returns a function
858
suitable for use as predicate to inspect.getmembers().
859
"""
860
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
861
False)
625
862
626
def _get_all_dbus_properties(self):
863
def _get_all_dbus_things(self, thing):
627
864
"""Returns a generator of (name, attribute) pairs
628
865
"""
629
return ((prop._dbus_name, prop)
630
for name, prop in
631
inspect.getmembers(self, self._is_dbus_property))
866
return ((getattr(athing.__get__(self), "_dbus_name",
867
name),
868
athing.__get__(self))
869
for cls in self.__class__.__mro__
870
for name, athing in
871
inspect.getmembers(cls,
872
self._is_dbus_thing(thing)))
632
873
633
874
def _get_dbus_property(self, interface_name, property_name):
634
875
"""Returns a bound method if one exists which is a D-Bus
635
876
property with the specified name and interface.
636
877
"""
637
for name in (property_name,
638
property_name + "_dbus_property"):
639
prop = getattr(self, name, None)
640
if (prop is None
641
or not self._is_dbus_property(prop)
642
or prop._dbus_name != property_name
643
or (interface_name and prop._dbus_interface
644
and interface_name != prop._dbus_interface)):
645
continue
646
return prop
878
for cls in self.__class__.__mro__:
879
for name, value in (inspect.getmembers
880
(cls,
881
self._is_dbus_thing("property"))):
882
if (value._dbus_name == property_name
883
and value._dbus_interface == interface_name):
884
return value.__get__(self)
885
647
886
# No such property
648
887
raise DBusPropertyNotFound(self.dbus_object_path + ":"
649
888
+ interface_name + "."
673
912
# The byte_arrays option is not supported yet on
674
913
# signatures other than "ay".
675
914
if prop._dbus_signature != "ay":
676
raise ValueError
677
value = dbus.ByteArray(''.join(unichr(byte)
678
for byte in value))
915
raise ValueError("Byte arrays not supported for non-"
916
"'ay' signature {!r}"
917
.format(prop._dbus_signature))
918
value = dbus.ByteArray(b''.join(chr(byte)
919
for byte in value))
679
920
prop(value)
680
921
681
922
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
683
924
def GetAll(self, interface_name):
684
925
"""Standard D-Bus property GetAll() method, see D-Bus
685
926
standard.
686
927
687
928
Note: Will not include properties with access="write".
688
929
"""
689
all = {}
690
for name, prop in self._get_all_dbus_properties():
930
properties = {}
931
for name, prop in self._get_all_dbus_things("property"):
691
932
if (interface_name
692
933
and interface_name != prop._dbus_interface):
693
934
# Interface non-empty but did not match
697
938
continue
698
939
value = prop()
699
940
if not hasattr(value, "variant_level"):
700
all[name] = value
941
properties[name] = value
701
942
continue
702
all[name] = type(value)(value, variant_level=
703
value.variant_level+1)
704
return dbus.Dictionary(all, signature="sv")
943
properties[name] = type(value)(value, variant_level=
944
value.variant_level+1)
945
return dbus.Dictionary(properties, signature="sv")
705
946
706
947
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
707
948
out_signature="s",
708
949
path_keyword='object_path',
709
950
connection_keyword='connection')
710
951
def Introspect(self, object_path, connection):
711
"""Standard D-Bus method, overloaded to insert property tags.
952
"""Overloading of standard D-Bus method.
953
954
Inserts property tags and interface annotation tags.
712
955
"""
713
956
xmlstring = dbus.service.Object.Introspect(self, object_path,
714
957
connection)
721
964
e.setAttribute("access", prop._dbus_access)
722
965
return e
723
966
for if_tag in document.getElementsByTagName("interface"):
967
# Add property tags
724
968
for tag in (make_tag(document, name, prop)
725
969
for name, prop
726
in self._get_all_dbus_properties()
970
in self._get_all_dbus_things("property")
727
971
if prop._dbus_interface
728
972
== if_tag.getAttribute("name")):
729
973
if_tag.appendChild(tag)
974
# Add annotation tags
975
for typ in ("method", "signal", "property"):
976
for tag in if_tag.getElementsByTagName(typ):
977
annots = dict()
978
for name, prop in (self.
979
_get_all_dbus_things(typ)):
980
if (name == tag.getAttribute("name")
981
and prop._dbus_interface
982
== if_tag.getAttribute("name")):
983
annots.update(getattr
984
(prop,
985
"_dbus_annotations",
986
{}))
987
for name, value in annots.items():
988
ann_tag = document.createElement(
989
"annotation")
990
ann_tag.setAttribute("name", name)
991
ann_tag.setAttribute("value", value)
992
tag.appendChild(ann_tag)
993
# Add interface annotation tags
994
for annotation, value in dict(
995
itertools.chain.from_iterable(
996
annotations().items()
997
for name, annotations in
998
self._get_all_dbus_things("interface")
999
if name == if_tag.getAttribute("name")
1000
)).items():
1001
ann_tag = document.createElement("annotation")
1002
ann_tag.setAttribute("name", annotation)
1003
ann_tag.setAttribute("value", value)
1004
if_tag.appendChild(ann_tag)
730
1005
# Add the names to the return values for the
731
1006
# "org.freedesktop.DBus.Properties" methods
732
1007
if (if_tag.getAttribute("name")
747
1022
except (AttributeError, xml.dom.DOMException,
748
1023
xml.parsers.expat.ExpatError) as error:
749
1024
logger.error("Failed to override Introspection method",
750
error)
1025
exc_info=error)
751
1026
return xmlstring
752
1027
753
1028
1029
def datetime_to_dbus(dt, variant_level=0):
1030
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1031
if dt is None:
1032
return dbus.String("", variant_level = variant_level)
1033
return dbus.String(dt.isoformat(),
1034
variant_level=variant_level)
1035
1036
1037
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1038
"""A class decorator; applied to a subclass of
1039
dbus.service.Object, it will add alternate D-Bus attributes with
1040
interface names according to the "alt_interface_names" mapping.
1041
Usage:
1042
1043
@alternate_dbus_interfaces({"org.example.Interface":
1044
"net.example.AlternateInterface"})
1045
class SampleDBusObject(dbus.service.Object):
1046
@dbus.service.method("org.example.Interface")
1047
def SampleDBusMethod():
1048
pass
1049
1050
The above "SampleDBusMethod" on "SampleDBusObject" will be
1051
reachable via two interfaces: "org.example.Interface" and
1052
"net.example.AlternateInterface", the latter of which will have
1053
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1054
"true", unless "deprecate" is passed with a False value.
1055
1056
This works for methods and signals, and also for D-Bus properties
1057
(from DBusObjectWithProperties) and interfaces (from the
1058
dbus_interface_annotations decorator).
1059
"""
1060
def wrapper(cls):
1061
for orig_interface_name, alt_interface_name in (
1062
alt_interface_names.items()):
1063
attr = {}
1064
interface_names = set()
1065
# Go though all attributes of the class
1066
for attrname, attribute in inspect.getmembers(cls):
1067
# Ignore non-D-Bus attributes, and D-Bus attributes
1068
# with the wrong interface name
1069
if (not hasattr(attribute, "_dbus_interface")
1070
or not attribute._dbus_interface
1071
.startswith(orig_interface_name)):
1072
continue
1073
# Create an alternate D-Bus interface name based on
1074
# the current name
1075
alt_interface = (attribute._dbus_interface
1076
.replace(orig_interface_name,
1077
alt_interface_name))
1078
interface_names.add(alt_interface)
1079
# Is this a D-Bus signal?
1080
if getattr(attribute, "_dbus_is_signal", False):
1081
# Extract the original non-method undecorated
1082
# function by black magic
1083
nonmethod_func = (dict(
1084
zip(attribute.func_code.co_freevars,
1085
attribute.__closure__))["func"]
1086
.cell_contents)
1087
# Create a new, but exactly alike, function
1088
# object, and decorate it to be a new D-Bus signal
1089
# with the alternate D-Bus interface name
1090
new_function = (dbus.service.signal
1091
(alt_interface,
1092
attribute._dbus_signature)
1093
(types.FunctionType(
1094
nonmethod_func.func_code,
1095
nonmethod_func.func_globals,
1096
nonmethod_func.func_name,
1097
nonmethod_func.func_defaults,
1098
nonmethod_func.func_closure)))
1099
# Copy annotations, if any
1100
try:
1101
new_function._dbus_annotations = (
1102
dict(attribute._dbus_annotations))
1103
except AttributeError:
1104
pass
1105
# Define a creator of a function to call both the
1106
# original and alternate functions, so both the
1107
# original and alternate signals gets sent when
1108
# the function is called
1109
def fixscope(func1, func2):
1110
"""This function is a scope container to pass
1111
func1 and func2 to the "call_both" function
1112
outside of its arguments"""
1113
def call_both(*args, **kwargs):
1114
"""This function will emit two D-Bus
1115
signals by calling func1 and func2"""
1116
func1(*args, **kwargs)
1117
func2(*args, **kwargs)
1118
return call_both
1119
# Create the "call_both" function and add it to
1120
# the class
1121
attr[attrname] = fixscope(attribute, new_function)
1122
# Is this a D-Bus method?
1123
elif getattr(attribute, "_dbus_is_method", False):
1124
# Create a new, but exactly alike, function
1125
# object. Decorate it to be a new D-Bus method
1126
# with the alternate D-Bus interface name. Add it
1127
# to the class.
1128
attr[attrname] = (dbus.service.method
1129
(alt_interface,
1130
attribute._dbus_in_signature,
1131
attribute._dbus_out_signature)
1132
(types.FunctionType
1133
(attribute.func_code,
1134
attribute.func_globals,
1135
attribute.func_name,
1136
attribute.func_defaults,
1137
attribute.func_closure)))
1138
# Copy annotations, if any
1139
try:
1140
attr[attrname]._dbus_annotations = (
1141
dict(attribute._dbus_annotations))
1142
except AttributeError:
1143
pass
1144
# Is this a D-Bus property?
1145
elif getattr(attribute, "_dbus_is_property", False):
1146
# Create a new, but exactly alike, function
1147
# object, and decorate it to be a new D-Bus
1148
# property with the alternate D-Bus interface
1149
# name. Add it to the class.
1150
attr[attrname] = (dbus_service_property
1151
(alt_interface,
1152
attribute._dbus_signature,
1153
attribute._dbus_access,
1154
attribute
1155
._dbus_get_args_options
1156
["byte_arrays"])
1157
(types.FunctionType
1158
(attribute.func_code,
1159
attribute.func_globals,
1160
attribute.func_name,
1161
attribute.func_defaults,
1162
attribute.func_closure)))
1163
# Copy annotations, if any
1164
try:
1165
attr[attrname]._dbus_annotations = (
1166
dict(attribute._dbus_annotations))
1167
except AttributeError:
1168
pass
1169
# Is this a D-Bus interface?
1170
elif getattr(attribute, "_dbus_is_interface", False):
1171
# Create a new, but exactly alike, function
1172
# object. Decorate it to be a new D-Bus interface
1173
# with the alternate D-Bus interface name. Add it
1174
# to the class.
1175
attr[attrname] = (dbus_interface_annotations
1176
(alt_interface)
1177
(types.FunctionType
1178
(attribute.func_code,
1179
attribute.func_globals,
1180
attribute.func_name,
1181
attribute.func_defaults,
1182
attribute.func_closure)))
1183
if deprecate:
1184
# Deprecate all alternate interfaces
1185
iname="_AlternateDBusNames_interface_annotation{}"
1186
for interface_name in interface_names:
1187
@dbus_interface_annotations(interface_name)
1188
def func(self):
1189
return { "org.freedesktop.DBus.Deprecated":
1190
"true" }
1191
# Find an unused name
1192
for aname in (iname.format(i)
1193
for i in itertools.count()):
1194
if aname not in attr:
1195
attr[aname] = func
1196
break
1197
if interface_names:
1198
# Replace the class with a new subclass of it with
1199
# methods, signals, etc. as created above.
1200
cls = type(b"{}Alternate".format(cls.__name__),
1201
(cls,), attr)
1202
return cls
1203
return wrapper
1204
1205
1206
@alternate_dbus_interfaces({"se.recompile.Mandos":
1207
"se.bsnet.fukt.Mandos"})
754
1208
class ClientDBus(Client, DBusObjectWithProperties):
755
1209
"""A Client class using D-Bus
756
1210
765
1219
# dbus.service.Object doesn't use super(), so we can't either.
766
1220
767
1221
def __init__(self, bus = None, *args, **kwargs):
768
self._approvals_pending = 0
769
1222
self.bus = bus
770
1223
Client.__init__(self, *args, **kwargs)
771
1224
# Only now, when this client is initialized, can it show up on
777
1230
("/clients/" + client_object_name))
778
1231
DBusObjectWithProperties.__init__(self, self.bus,
779
1232
self.dbus_object_path)
780
def _set_expires(self, value):
781
old_value = getattr(self, "_expires", None)
782
self._expires = value
783
if hasattr(self, "dbus_object_path") and old_value != value:
784
dbus_time = (self._datetime_to_dbus(self._expires,
785
variant_level=1))
786
self.PropertyChanged(dbus.String("Expires"),
787
dbus_time)
788
expires = property(lambda self: self._expires, _set_expires)
789
del _set_expires
790
791
def _get_approvals_pending(self):
792
return self._approvals_pending
793
def _set_approvals_pending(self, value):
794
old_value = self._approvals_pending
795
self._approvals_pending = value
796
bval = bool(value)
797
if (hasattr(self, "dbus_object_path")
798
and bval is not bool(old_value)):
799
dbus_bool = dbus.Boolean(bval, variant_level=1)
800
self.PropertyChanged(dbus.String("ApprovalPending"),
801
dbus_bool)
802
803
approvals_pending = property(_get_approvals_pending,
804
_set_approvals_pending)
805
del _get_approvals_pending, _set_approvals_pending
806
807
@staticmethod
808
def _datetime_to_dbus(dt, variant_level=0):
809
"""Convert a UTC datetime.datetime() to a D-Bus type."""
810
if dt is None:
811
return dbus.String("", variant_level = variant_level)
812
return dbus.String(dt.isoformat(),
813
variant_level=variant_level)
814
815
def enable(self):
816
oldstate = getattr(self, "enabled", False)
817
r = Client.enable(self)
818
if oldstate != self.enabled:
819
# Emit D-Bus signals
820
self.PropertyChanged(dbus.String("Enabled"),
821
dbus.Boolean(True, variant_level=1))
822
self.PropertyChanged(
823
dbus.String("LastEnabled"),
824
self._datetime_to_dbus(self.last_enabled,
825
variant_level=1))
826
return r
827
828
def disable(self, quiet = False):
829
oldstate = getattr(self, "enabled", False)
830
r = Client.disable(self, quiet=quiet)
831
if not quiet and oldstate != self.enabled:
832
# Emit D-Bus signal
833
self.PropertyChanged(dbus.String("Enabled"),
834
dbus.Boolean(False, variant_level=1))
835
return r
1233
1234
def notifychangeproperty(transform_func,
1235
dbus_name, type_func=lambda x: x,
1236
variant_level=1):
1237
""" Modify a variable so that it's a property which announces
1238
its changes to DBus.
1239
1240
transform_fun: Function that takes a value and a variant_level
1241
and transforms it to a D-Bus type.
1242
dbus_name: D-Bus name of the variable
1243
type_func: Function that transform the value before sending it
1244
to the D-Bus. Default: no transform
1245
variant_level: D-Bus variant level. Default: 1
1246
"""
1247
attrname = "_{}".format(dbus_name)
1248
def setter(self, value):
1249
if hasattr(self, "dbus_object_path"):
1250
if (not hasattr(self, attrname) or
1251
type_func(getattr(self, attrname, None))
1252
!= type_func(value)):
1253
dbus_value = transform_func(type_func(value),
1254
variant_level
1255
=variant_level)
1256
self.PropertyChanged(dbus.String(dbus_name),
1257
dbus_value)
1258
setattr(self, attrname, value)
1259
1260
return property(lambda self: getattr(self, attrname), setter)
1261
1262
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1263
approvals_pending = notifychangeproperty(dbus.Boolean,
1264
"ApprovalPending",
1265
type_func = bool)
1266
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1267
last_enabled = notifychangeproperty(datetime_to_dbus,
1268
"LastEnabled")
1269
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1270
type_func = lambda checker:
1271
checker is not None)
1272
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1273
"LastCheckedOK")
1274
last_checker_status = notifychangeproperty(dbus.Int16,
1275
"LastCheckerStatus")
1276
last_approval_request = notifychangeproperty(
1277
datetime_to_dbus, "LastApprovalRequest")
1278
approved_by_default = notifychangeproperty(dbus.Boolean,
1279
"ApprovedByDefault")
1280
approval_delay = notifychangeproperty(dbus.UInt64,
1281
"ApprovalDelay",
1282
type_func =
1283
lambda td: td.total_seconds()
1284
* 1000)
1285
approval_duration = notifychangeproperty(
1286
dbus.UInt64, "ApprovalDuration",
1287
type_func = lambda td: td.total_seconds() * 1000)
1288
host = notifychangeproperty(dbus.String, "Host")
1289
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1290
type_func = lambda td:
1291
td.total_seconds() * 1000)
1292
extended_timeout = notifychangeproperty(
1293
dbus.UInt64, "ExtendedTimeout",
1294
type_func = lambda td: td.total_seconds() * 1000)
1295
interval = notifychangeproperty(dbus.UInt64,
1296
"Interval",
1297
type_func =
1298
lambda td: td.total_seconds()
1299
* 1000)
1300
checker_command = notifychangeproperty(dbus.String, "Checker")
1301
1302
del notifychangeproperty
836
1303
837
1304
def __del__(self, *args, **kwargs):
838
1305
try:
847
1314
*args, **kwargs):
848
1315
self.checker_callback_tag = None
849
1316
self.checker = None
850
# Emit D-Bus signal
851
self.PropertyChanged(dbus.String("CheckerRunning"),
852
dbus.Boolean(False, variant_level=1))
853
1317
if os.WIFEXITED(condition):
854
1318
exitstatus = os.WEXITSTATUS(condition)
855
1319
# Emit D-Bus signal
865
1329
return Client.checker_callback(self, pid, condition, command,
866
1330
*args, **kwargs)
867
1331
868
def checked_ok(self, *args, **kwargs):
869
Client.checked_ok(self, *args, **kwargs)
870
# Emit D-Bus signal
871
self.PropertyChanged(
872
dbus.String("LastCheckedOK"),
873
(self._datetime_to_dbus(self.last_checked_ok,
874
variant_level=1)))
875
876
def need_approval(self, *args, **kwargs):
877
r = Client.need_approval(self, *args, **kwargs)
878
# Emit D-Bus signal
879
self.PropertyChanged(
880
dbus.String("LastApprovalRequest"),
881
(self._datetime_to_dbus(self.last_approval_request,
882
variant_level=1)))
883
return r
884
885
1332
def start_checker(self, *args, **kwargs):
886
old_checker = self.checker
887
if self.checker is not None:
888
old_checker_pid = self.checker.pid
889
else:
890
old_checker_pid = None
1333
old_checker_pid = getattr(self.checker, "pid", None)
891
1334
r = Client.start_checker(self, *args, **kwargs)
892
1335
# Only if new checker process was started
893
1336
if (self.checker is not None
894
1337
and old_checker_pid != self.checker.pid):
895
1338
# Emit D-Bus signal
896
1339
self.CheckerStarted(self.current_checker_command)
897
self.PropertyChanged(
898
dbus.String("CheckerRunning"),
899
dbus.Boolean(True, variant_level=1))
900
1340
return r
901
1341
902
def stop_checker(self, *args, **kwargs):
903
old_checker = getattr(self, "checker", None)
904
r = Client.stop_checker(self, *args, **kwargs)
905
if (old_checker is not None
906
and getattr(self, "checker", None) is None):
907
self.PropertyChanged(dbus.String("CheckerRunning"),
908
dbus.Boolean(False, variant_level=1))
909
return r
910
911
1342
def _reset_approved(self):
912
self._approved = None
1343
self.approved = None
913
1344
return False
914
1345
915
1346
def approve(self, value=True):
1347
self.approved = value
1348
gobject.timeout_add(int(self.approval_duration.total_seconds()
1349
* 1000), self._reset_approved)
916
1350
self.send_changedstate()
917
self._approved = value
918
gobject.timeout_add(self._timedelta_to_milliseconds
919
(self.approval_duration),
920
self._reset_approved)
921
922
1351
923
1352
## D-Bus methods, signals & properties
924
_interface = "se.bsnet.fukt.Mandos.Client"
1353
_interface = "se.recompile.Mandos.Client"
1354
1355
## Interfaces
1356
1357
@dbus_interface_annotations(_interface)
1358
def _foo(self):
1359
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1360
"false"}
925
1361
926
1362
## Signals
927
1363
1012
1448
def ApprovedByDefault_dbus_property(self, value=None):
1013
1449
if value is None: # get
1014
1450
return dbus.Boolean(self.approved_by_default)
1015
old_value = self.approved_by_default
1016
1451
self.approved_by_default = bool(value)
1017
# Emit D-Bus signal
1018
if old_value != self.approved_by_default:
1019
self.PropertyChanged(dbus.String("ApprovedByDefault"),
1020
dbus.Boolean(value, variant_level=1))
1021
1452
1022
1453
# ApprovalDelay - property
1023
1454
@dbus_service_property(_interface, signature="t",
1024
1455
access="readwrite")
1025
1456
def ApprovalDelay_dbus_property(self, value=None):
1026
1457
if value is None: # get
1027
return dbus.UInt64(self.approval_delay_milliseconds())
1028
old_value = self.approval_delay
1458
return dbus.UInt64(self.approval_delay.total_seconds()
1459
* 1000)
1029
1460
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1030
# Emit D-Bus signal
1031
if old_value != self.approval_delay:
1032
self.PropertyChanged(dbus.String("ApprovalDelay"),
1033
dbus.UInt64(value, variant_level=1))
1034
1461
1035
1462
# ApprovalDuration - property
1036
1463
@dbus_service_property(_interface, signature="t",
1037
1464
access="readwrite")
1038
1465
def ApprovalDuration_dbus_property(self, value=None):
1039
1466
if value is None: # get
1040
return dbus.UInt64(self._timedelta_to_milliseconds(
1041
self.approval_duration))
1042
old_value = self.approval_duration
1467
return dbus.UInt64(self.approval_duration.total_seconds()
1468
* 1000)
1043
1469
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1044
# Emit D-Bus signal
1045
if old_value != self.approval_duration:
1046
self.PropertyChanged(dbus.String("ApprovalDuration"),
1047
dbus.UInt64(value, variant_level=1))
1048
1470
1049
1471
# Name - property
1050
1472
@dbus_service_property(_interface, signature="s", access="read")
1062
1484
def Host_dbus_property(self, value=None):
1063
1485
if value is None: # get
1064
1486
return dbus.String(self.host)
1065
old_value = self.host
1066
self.host = value
1067
# Emit D-Bus signal
1068
if old_value != self.host:
1069
self.PropertyChanged(dbus.String("Host"),
1070
dbus.String(value, variant_level=1))
1487
self.host = unicode(value)
1071
1488
1072
1489
# Created - property
1073
1490
@dbus_service_property(_interface, signature="s", access="read")
1074
1491
def Created_dbus_property(self):
1075
return dbus.String(self._datetime_to_dbus(self.created))
1492
return datetime_to_dbus(self.created)
1076
1493
1077
1494
# LastEnabled - property
1078
1495
@dbus_service_property(_interface, signature="s", access="read")
1079
1496
def LastEnabled_dbus_property(self):
1080
return self._datetime_to_dbus(self.last_enabled)
1497
return datetime_to_dbus(self.last_enabled)
1081
1498
1082
1499
# Enabled - property
1083
1500
@dbus_service_property(_interface, signature="b",
1097
1514
if value is not None:
1098
1515
self.checked_ok()
1099
1516
return
1100
return self._datetime_to_dbus(self.last_checked_ok)
1517
return datetime_to_dbus(self.last_checked_ok)
1518
1519
# LastCheckerStatus - property
1520
@dbus_service_property(_interface, signature="n",
1521
access="read")
1522
def LastCheckerStatus_dbus_property(self):
1523
return dbus.Int16(self.last_checker_status)
1101
1524
1102
1525
# Expires - property
1103
1526
@dbus_service_property(_interface, signature="s", access="read")
1104
1527
def Expires_dbus_property(self):
1105
return self._datetime_to_dbus(self.expires)
1528
return datetime_to_dbus(self.expires)
1106
1529
1107
1530
# LastApprovalRequest - property
1108
1531
@dbus_service_property(_interface, signature="s", access="read")
1109
1532
def LastApprovalRequest_dbus_property(self):
1110
return self._datetime_to_dbus(self.last_approval_request)
1533
return datetime_to_dbus(self.last_approval_request)
1111
1534
1112
1535
# Timeout - property
1113
1536
@dbus_service_property(_interface, signature="t",
1114
1537
access="readwrite")
1115
1538
def Timeout_dbus_property(self, value=None):
1116
1539
if value is None: # get
1117
return dbus.UInt64(self.timeout_milliseconds())
1118
old_value = self.timeout
1540
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1541
old_timeout = self.timeout
1119
1542
self.timeout = datetime.timedelta(0, 0, 0, value)
1120
# Emit D-Bus signal
1121
if old_value != self.timeout:
1122
self.PropertyChanged(dbus.String("Timeout"),
1123
dbus.UInt64(value, variant_level=1))
1124
if getattr(self, "disable_initiator_tag", None) is None:
1125
return
1126
# Reschedule timeout
1127
gobject.source_remove(self.disable_initiator_tag)
1128
self.disable_initiator_tag = None
1129
self.expires = None
1130
time_to_die = (self.
1131
_timedelta_to_milliseconds((self
1132
.last_checked_ok
1133
+ self.timeout)
1134
- datetime.datetime
1135
.utcnow()))
1136
if time_to_die <= 0:
1137
# The timeout has passed
1138
self.disable()
1139
else:
1140
self.expires = (datetime.datetime.utcnow()
1141
+ datetime.timedelta(milliseconds = time_to_die))
1142
self.disable_initiator_tag = (gobject.timeout_add
1143
(time_to_die, self.disable))
1144
1543
# Reschedule disabling
1544
if self.enabled:
1545
now = datetime.datetime.utcnow()
1546
self.expires += self.timeout - old_timeout
1547
if self.expires <= now:
1548
# The timeout has passed
1549
self.disable()
1550
else:
1551
if (getattr(self, "disable_initiator_tag", None)
1552
is None):
1553
return
1554
gobject.source_remove(self.disable_initiator_tag)
1555
self.disable_initiator_tag = (
1556
gobject.timeout_add(
1557
int((self.expires - now).total_seconds()
1558
* 1000), self.disable))
1559
1145
1560
# ExtendedTimeout - property
1146
1561
@dbus_service_property(_interface, signature="t",
1147
1562
access="readwrite")
1148
1563
def ExtendedTimeout_dbus_property(self, value=None):
1149
1564
if value is None: # get
1150
return dbus.UInt64(self.extended_timeout_milliseconds())
1151
old_value = self.extended_timeout
1565
return dbus.UInt64(self.extended_timeout.total_seconds()
1566
* 1000)
1152
1567
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1153
# Emit D-Bus signal
1154
if old_value != self.extended_timeout:
1155
self.PropertyChanged(dbus.String("ExtendedTimeout"),
1156
dbus.UInt64(value, variant_level=1))
1157
1568
1158
1569
# Interval - property
1159
1570
@dbus_service_property(_interface, signature="t",
1160
1571
access="readwrite")
1161
1572
def Interval_dbus_property(self, value=None):
1162
1573
if value is None: # get
1163
return dbus.UInt64(self.interval_milliseconds())
1164
old_value = self.interval
1574
return dbus.UInt64(self.interval.total_seconds() * 1000)
1165
1575
self.interval = datetime.timedelta(0, 0, 0, value)
1166
# Emit D-Bus signal
1167
if old_value != self.interval:
1168
self.PropertyChanged(dbus.String("Interval"),
1169
dbus.UInt64(value, variant_level=1))
1170
1576
if getattr(self, "checker_initiator_tag", None) is None:
1171
1577
return
1172
# Reschedule checker run
1173
gobject.source_remove(self.checker_initiator_tag)
1174
self.checker_initiator_tag = (gobject.timeout_add
1175
(value, self.start_checker))
1176
self.start_checker() # Start one now, too
1177
1578
if self.enabled:
1579
# Reschedule checker run
1580
gobject.source_remove(self.checker_initiator_tag)
1581
self.checker_initiator_tag = (gobject.timeout_add
1582
(value, self.start_checker))
1583
self.start_checker() # Start one now, too
1584
1178
1585
# Checker - property
1179
1586
@dbus_service_property(_interface, signature="s",
1180
1587
access="readwrite")
1181
1588
def Checker_dbus_property(self, value=None):
1182
1589
if value is None: # get
1183
1590
return dbus.String(self.checker_command)
1184
old_value = self.checker_command
1185
self.checker_command = value
1186
# Emit D-Bus signal
1187
if old_value != self.checker_command:
1188
self.PropertyChanged(dbus.String("Checker"),
1189
dbus.String(self.checker_command,
1190
variant_level=1))
1591
self.checker_command = unicode(value)
1191
1592
1192
1593
# CheckerRunning - property
1193
1594
@dbus_service_property(_interface, signature="b",
1209
1610
@dbus_service_property(_interface, signature="ay",
1210
1611
access="write", byte_arrays=True)
1211
1612
def Secret_dbus_property(self, value):
1212
self.secret = str(value)
1613
self.secret = bytes(value)
1213
1614
1214
1615
del _interface
1215
1616
1220
1621
self._pipe.send(('init', fpr, address))
1221
1622
if not self._pipe.recv():
1222
1623
raise KeyError()
1223
1624
1224
1625
def __getattribute__(self, name):
1225
if(name == '_pipe'):
1626
if name == '_pipe':
1226
1627
return super(ProxyClient, self).__getattribute__(name)
1227
1628
self._pipe.send(('getattr', name))
1228
1629
data = self._pipe.recv()
1233
1634
self._pipe.send(('funcall', name, args, kwargs))
1234
1635
return self._pipe.recv()[1]
1235
1636
return func
1236
1637
1237
1638
def __setattr__(self, name, value):
1238
if(name == '_pipe'):
1639
if name == '_pipe':
1239
1640
return super(ProxyClient, self).__setattr__(name, value)
1240
1641
self._pipe.send(('setattr', name, value))
1241
1642
1252
1653
unicode(self.client_address))
1253
1654
logger.debug("Pipe FD: %d",
1254
1655
self.server.child_pipe.fileno())
1255
1656
1256
1657
session = (gnutls.connection
1257
1658
.ClientSession(self.request,
1258
1659
gnutls.connection
1259
1660
.X509Credentials()))
1260
1661
1261
1662
# Note: gnutls.connection.X509Credentials is really a
1262
1663
# generic GnuTLS certificate credentials object so long as
1263
1664
# no X.509 keys are added to it. Therefore, we can use it
1264
1665
# here despite using OpenPGP certificates.
1265
1666
1266
1667
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1267
1668
# "+AES-256-CBC", "+SHA1",
1268
1669
# "+COMP-NULL", "+CTYPE-OPENPGP",
1274
1675
(gnutls.library.functions
1275
1676
.gnutls_priority_set_direct(session._c_object,
1276
1677
priority, None))
1277
1678
1278
1679
# Start communication using the Mandos protocol
1279
1680
# Get protocol number
1280
1681
line = self.request.makefile().readline()
1281
1682
logger.debug("Protocol version: %r", line)
1282
1683
try:
1283
1684
if int(line.strip().split()[0]) > 1:
1284
raise RuntimeError
1685
raise RuntimeError(line)
1285
1686
except (ValueError, IndexError, RuntimeError) as error:
1286
1687
logger.error("Unknown protocol version: %s", error)
1287
1688
return
1288
1689
1289
1690
# Start GnuTLS connection
1290
1691
try:
1291
1692
session.handshake()
1295
1696
# established. Just abandon the request.
1296
1697
return
1297
1698
logger.debug("Handshake succeeded")
1298
1699
1299
1700
approval_required = False
1300
1701
try:
1301
1702
try:
1306
1707
logger.warning("Bad certificate: %s", error)
1307
1708
return
1308
1709
logger.debug("Fingerprint: %s", fpr)
1309
1710
1310
1711
try:
1311
1712
client = ProxyClient(child_pipe, fpr,
1312
1713
self.client_address)
1324
1725
client.name)
1325
1726
if self.server.use_dbus:
1326
1727
# Emit D-Bus signal
1327
client.Rejected("Disabled")
1728
client.Rejected("Disabled")
1328
1729
return
1329
1730
1330
if client._approved or not client.approval_delay:
1731
if client.approved or not client.approval_delay:
1331
1732
#We are approved or approval is disabled
1332
1733
break
1333
elif client._approved is None:
1734
elif client.approved is None:
1334
1735
logger.info("Client %s needs approval",
1335
1736
client.name)
1336
1737
if self.server.use_dbus:
1337
1738
# Emit D-Bus signal
1338
1739
client.NeedApproval(
1339
client.approval_delay_milliseconds(),
1340
client.approved_by_default)
1740
client.approval_delay.total_seconds()
1741
* 1000, client.approved_by_default)
1341
1742
else:
1342
1743
logger.warning("Client %s was not approved",
1343
1744
client.name)
1347
1748
return
1348
1749
1349
1750
#wait until timeout or approved
1350
#x = float(client._timedelta_to_milliseconds(delay))
1351
1751
time = datetime.datetime.now()
1352
1752
client.changedstate.acquire()
1353
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1753
client.changedstate.wait(delay.total_seconds())
1354
1754
client.changedstate.release()
1355
1755
time2 = datetime.datetime.now()
1356
1756
if (time2 - time) >= delay:
1372
1772
try:
1373
1773
sent = session.send(client.secret[sent_size:])
1374
1774
except gnutls.errors.GNUTLSError as error:
1375
logger.warning("gnutls send failed")
1775
logger.warning("gnutls send failed",
1776
exc_info=error)
1376
1777
return
1377
1778
logger.debug("Sent: %d, remaining: %d",
1378
1779
sent, len(client.secret)
1379
1780
- (sent_size + sent))
1380
1781
sent_size += sent
1381
1782
1382
1783
logger.info("Sending secret to %s", client.name)
1383
# bump the timeout as if seen
1384
client.checked_ok(client.extended_timeout)
1784
# bump the timeout using extended_timeout
1785
client.bump_timeout(client.extended_timeout)
1385
1786
if self.server.use_dbus:
1386
1787
# Emit D-Bus signal
1387
1788
client.GotSecret()
1392
1793
try:
1393
1794
session.bye()
1394
1795
except gnutls.errors.GNUTLSError as error:
1395
logger.warning("GnuTLS bye failed")
1796
logger.warning("GnuTLS bye failed",
1797
exc_info=error)
1396
1798
1397
1799
@staticmethod
1398
1800
def peer_certificate(session):
1454
1856
# Convert the buffer to a Python bytestring
1455
1857
fpr = ctypes.string_at(buf, buf_len.value)
1456
1858
# Convert the bytestring to hexadecimal notation
1457
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1859
hex_fpr = binascii.hexlify(fpr).upper()
1458
1860
return hex_fpr
1459
1861
1460
1862
1463
1865
def sub_process_main(self, request, address):
1464
1866
try:
1465
1867
self.finish_request(request, address)
1466
except:
1868
except Exception:
1467
1869
self.handle_error(request, address)
1468
1870
self.close_request(request)
1469
1871
1470
1872
def process_request(self, request, address):
1471
1873
"""Start a new process to process the request."""
1472
multiprocessing.Process(target = self.sub_process_main,
1473
args = (request, address)).start()
1874
proc = multiprocessing.Process(target = self.sub_process_main,
1875
args = (request, address))
1876
proc.start()
1877
return proc
1878
1474
1879
1475
1880
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1476
1881
""" adds a pipe to the MixIn """
1480
1885
This function creates a new pipe in self.pipe
1481
1886
"""
1482
1887
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1483
1484
super(MultiprocessingMixInWithPipe,
1485
self).process_request(request, client_address)
1888
1889
proc = MultiprocessingMixIn.process_request(self, request,
1890
client_address)
1486
1891
self.child_pipe.close()
1487
self.add_pipe(parent_pipe)
1488
1489
def add_pipe(self, parent_pipe):
1892
self.add_pipe(parent_pipe, proc)
1893
1894
def add_pipe(self, parent_pipe, proc):
1490
1895
"""Dummy function; override as necessary"""
1491
raise NotImplementedError
1896
raise NotImplementedError()
1897
1492
1898
1493
1899
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1494
1900
socketserver.TCPServer, object):
1500
1906
use_ipv6: Boolean; to use IPv6 or not
1501
1907
"""
1502
1908
def __init__(self, server_address, RequestHandlerClass,
1503
interface=None, use_ipv6=True):
1909
interface=None, use_ipv6=True, socketfd=None):
1910
"""If socketfd is set, use that file descriptor instead of
1911
creating a new one with socket.socket().
1912
"""
1504
1913
self.interface = interface
1505
1914
if use_ipv6:
1506
1915
self.address_family = socket.AF_INET6
1916
if socketfd is not None:
1917
# Save the file descriptor
1918
self.socketfd = socketfd
1919
# Save the original socket.socket() function
1920
self.socket_socket = socket.socket
1921
# To implement --socket, we monkey patch socket.socket.
1922
#
1923
# (When socketserver.TCPServer is a new-style class, we
1924
# could make self.socket into a property instead of monkey
1925
# patching socket.socket.)
1926
#
1927
# Create a one-time-only replacement for socket.socket()
1928
@functools.wraps(socket.socket)
1929
def socket_wrapper(*args, **kwargs):
1930
# Restore original function so subsequent calls are
1931
# not affected.
1932
socket.socket = self.socket_socket
1933
del self.socket_socket
1934
# This time only, return a new socket object from the
1935
# saved file descriptor.
1936
return socket.fromfd(self.socketfd, *args, **kwargs)
1937
# Replace socket.socket() function with wrapper
1938
socket.socket = socket_wrapper
1939
# The socketserver.TCPServer.__init__ will call
1940
# socket.socket(), which might be our replacement,
1941
# socket_wrapper(), if socketfd was set.
1507
1942
socketserver.TCPServer.__init__(self, server_address,
1508
1943
RequestHandlerClass)
1944
1509
1945
def server_bind(self):
1510
1946
"""This overrides the normal server_bind() function
1511
1947
to bind to an interface if one was specified, and also NOT to
1519
1955
try:
1520
1956
self.socket.setsockopt(socket.SOL_SOCKET,
1521
1957
SO_BINDTODEVICE,
1522
str(self.interface
1523
+ '\0'))
1958
(self.interface + "\0")
1959
.encode("utf-8"))
1524
1960
except socket.error as error:
1525
if error[0] == errno.EPERM:
1526
logger.error("No permission to"
1527
" bind to interface %s",
1528
self.interface)
1529
elif error[0] == errno.ENOPROTOOPT:
1961
if error.errno == errno.EPERM:
1962
logger.error("No permission to bind to"
1963
" interface %s", self.interface)
1964
elif error.errno == errno.ENOPROTOOPT:
1530
1965
logger.error("SO_BINDTODEVICE not available;"
1531
1966
" cannot bind to interface %s",
1532
1967
self.interface)
1968
elif error.errno == errno.ENODEV:
1969
logger.error("Interface %s does not exist,"
1970
" cannot bind", self.interface)
1533
1971
else:
1534
1972
raise
1535
1973
# Only bind(2) the socket if we really need to.
1538
1976
if self.address_family == socket.AF_INET6:
1539
1977
any_address = "::" # in6addr_any
1540
1978
else:
1541
any_address = socket.INADDR_ANY
1979
any_address = "0.0.0.0" # INADDR_ANY
1542
1980
self.server_address = (any_address,
1543
1981
self.server_address[1])
1544
1982
elif not self.server_address[1]:
1565
2003
"""
1566
2004
def __init__(self, server_address, RequestHandlerClass,
1567
2005
interface=None, use_ipv6=True, clients=None,
1568
gnutls_priority=None, use_dbus=True):
2006
gnutls_priority=None, use_dbus=True, socketfd=None):
1569
2007
self.enabled = False
1570
2008
self.clients = clients
1571
2009
if self.clients is None:
1572
self.clients = set()
2010
self.clients = {}
1573
2011
self.use_dbus = use_dbus
1574
2012
self.gnutls_priority = gnutls_priority
1575
2013
IPv6_TCPServer.__init__(self, server_address,
1576
2014
RequestHandlerClass,
1577
2015
interface = interface,
1578
use_ipv6 = use_ipv6)
2016
use_ipv6 = use_ipv6,
2017
socketfd = socketfd)
1579
2018
def server_activate(self):
1580
2019
if self.enabled:
1581
2020
return socketserver.TCPServer.server_activate(self)
2021
1582
2022
def enable(self):
1583
2023
self.enabled = True
1584
def add_pipe(self, parent_pipe):
2024
2025
def add_pipe(self, parent_pipe, proc):
1585
2026
# Call "handle_ipc" for both data and EOF events
1586
2027
gobject.io_add_watch(parent_pipe.fileno(),
1587
2028
gobject.IO_IN | gobject.IO_HUP,
1588
2029
functools.partial(self.handle_ipc,
1589
parent_pipe = parent_pipe))
1590
2030
parent_pipe =
2031
parent_pipe,
2032
proc = proc))
2033
1591
2034
def handle_ipc(self, source, condition, parent_pipe=None,
1592
client_object=None):
1593
condition_names = {
1594
gobject.IO_IN: "IN", # There is data to read.
1595
gobject.IO_OUT: "OUT", # Data can be written (without
1596
# blocking).
1597
gobject.IO_PRI: "PRI", # There is urgent data to read.
1598
gobject.IO_ERR: "ERR", # Error condition.
1599
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1600
# broken, usually for pipes and
1601
# sockets).
1602
}
1603
conditions_string = ' | '.join(name
1604
for cond, name in
1605
condition_names.iteritems()
1606
if cond & condition)
1607
# error or the other end of multiprocessing.Pipe has closed
1608
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2035
proc = None, client_object=None):
2036
# error, or the other end of multiprocessing.Pipe has closed
2037
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2038
# Wait for other process to exit
2039
proc.join()
1609
2040
return False
1610
2041
1611
2042
# Read a request from the child
1616
2047
fpr = request[1]
1617
2048
address = request[2]
1618
2049
1619
for c in self.clients:
2050
for c in self.clients.itervalues():
1620
2051
if c.fingerprint == fpr:
1621
2052
client = c
1622
2053
break
1625
2056
"dress: %s", fpr, address)
1626
2057
if self.use_dbus:
1627
2058
# Emit D-Bus signal
1628
mandos_dbus_service.ClientNotFound(fpr, address[0])
2059
mandos_dbus_service.ClientNotFound(fpr,
2060
address[0])
1629
2061
parent_pipe.send(False)
1630
2062
return False
1631
2063
1632
2064
gobject.io_add_watch(parent_pipe.fileno(),
1633
2065
gobject.IO_IN | gobject.IO_HUP,
1634
2066
functools.partial(self.handle_ipc,
1635
parent_pipe = parent_pipe,
1636
client_object = client))
2067
parent_pipe =
2068
parent_pipe,
2069
proc = proc,
2070
client_object =
2071
client))
1637
2072
parent_pipe.send(True)
1638
# remove the old hook in favor of the new above hook on same fileno
2073
# remove the old hook in favor of the new above hook on
2074
# same fileno
1639
2075
return False
1640
2076
if command == 'funcall':
1641
2077
funcname = request[1]
1642
2078
args = request[2]
1643
2079
kwargs = request[3]
1644
2080
1645
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1646
2081
parent_pipe.send(('data', getattr(client_object,
2082
funcname)(*args,
2083
**kwargs)))
2084
1647
2085
if command == 'getattr':
1648
2086
attrname = request[1]
1649
2087
if callable(client_object.__getattribute__(attrname)):
1650
2088
parent_pipe.send(('function',))
1651
2089
else:
1652
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2090
parent_pipe.send(('data', client_object
2091
.__getattribute__(attrname)))
1653
2092
1654
2093
if command == 'setattr':
1655
2094
attrname = request[1]
1656
2095
value = request[2]
1657
2096
setattr(client_object, attrname, value)
1658
2097
1659
2098
return True
1660
2099
1661
2100
2101
def rfc3339_duration_to_delta(duration):
2102
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2103
2104
>>> rfc3339_duration_to_delta("P7D")
2105
datetime.timedelta(7)
2106
>>> rfc3339_duration_to_delta("PT60S")
2107
datetime.timedelta(0, 60)
2108
>>> rfc3339_duration_to_delta("PT60M")
2109
datetime.timedelta(0, 3600)
2110
>>> rfc3339_duration_to_delta("PT24H")
2111
datetime.timedelta(1)
2112
>>> rfc3339_duration_to_delta("P1W")
2113
datetime.timedelta(7)
2114
>>> rfc3339_duration_to_delta("PT5M30S")
2115
datetime.timedelta(0, 330)
2116
>>> rfc3339_duration_to_delta("P1DT3M20S")
2117
datetime.timedelta(1, 200)
2118
"""
2119
2120
# Parsing an RFC 3339 duration with regular expressions is not
2121
# possible - there would have to be multiple places for the same
2122
# values, like seconds. The current code, while more esoteric, is
2123
# cleaner without depending on a parsing library. If Python had a
2124
# built-in library for parsing we would use it, but we'd like to
2125
# avoid excessive use of external libraries.
2126
2127
# New type for defining tokens, syntax, and semantics all-in-one
2128
Token = collections.namedtuple("Token",
2129
("regexp", # To match token; if
2130
# "value" is not None,
2131
# must have a "group"
2132
# containing digits
2133
"value", # datetime.timedelta or
2134
# None
2135
"followers")) # Tokens valid after
2136
# this token
2137
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2138
# the "duration" ABNF definition in RFC 3339, Appendix A.
2139
token_end = Token(re.compile(r"$"), None, frozenset())
2140
token_second = Token(re.compile(r"(\d+)S"),
2141
datetime.timedelta(seconds=1),
2142
frozenset((token_end,)))
2143
token_minute = Token(re.compile(r"(\d+)M"),
2144
datetime.timedelta(minutes=1),
2145
frozenset((token_second, token_end)))
2146
token_hour = Token(re.compile(r"(\d+)H"),
2147
datetime.timedelta(hours=1),
2148
frozenset((token_minute, token_end)))
2149
token_time = Token(re.compile(r"T"),
2150
None,
2151
frozenset((token_hour, token_minute,
2152
token_second)))
2153
token_day = Token(re.compile(r"(\d+)D"),
2154
datetime.timedelta(days=1),
2155
frozenset((token_time, token_end)))
2156
token_month = Token(re.compile(r"(\d+)M"),
2157
datetime.timedelta(weeks=4),
2158
frozenset((token_day, token_end)))
2159
token_year = Token(re.compile(r"(\d+)Y"),
2160
datetime.timedelta(weeks=52),
2161
frozenset((token_month, token_end)))
2162
token_week = Token(re.compile(r"(\d+)W"),
2163
datetime.timedelta(weeks=1),
2164
frozenset((token_end,)))
2165
token_duration = Token(re.compile(r"P"), None,
2166
frozenset((token_year, token_month,
2167
token_day, token_time,
2168
token_week)))
2169
# Define starting values
2170
value = datetime.timedelta() # Value so far
2171
found_token = None
2172
followers = frozenset((token_duration,)) # Following valid tokens
2173
s = duration # String left to parse
2174
# Loop until end token is found
2175
while found_token is not token_end:
2176
# Search for any currently valid tokens
2177
for token in followers:
2178
match = token.regexp.match(s)
2179
if match is not None:
2180
# Token found
2181
if token.value is not None:
2182
# Value found, parse digits
2183
factor = int(match.group(1), 10)
2184
# Add to value so far
2185
value += factor * token.value
2186
# Strip token from string
2187
s = token.regexp.sub("", s, 1)
2188
# Go to found token
2189
found_token = token
2190
# Set valid next tokens
2191
followers = found_token.followers
2192
break
2193
else:
2194
# No currently valid tokens were found
2195
raise ValueError("Invalid RFC 3339 duration")
2196
# End token found
2197
return value
2198
2199
1662
2200
def string_to_delta(interval):
1663
2201
"""Parse a string and return a datetime.timedelta
1664
2202
1675
2213
>>> string_to_delta('5m 30s')
1676
2214
datetime.timedelta(0, 330)
1677
2215
"""
2216
2217
try:
2218
return rfc3339_duration_to_delta(interval)
2219
except ValueError:
2220
pass
2221
1678
2222
timevalue = datetime.timedelta(0)
1679
2223
for s in interval.split():
1680
2224
try:
1681
suffix = unicode(s[-1])
2225
suffix = s[-1]
1682
2226
value = int(s[:-1])
1683
2227
if suffix == "d":
1684
2228
delta = datetime.timedelta(value)
1691
2235
elif suffix == "w":
1692
2236
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1693
2237
else:
1694
raise ValueError("Unknown suffix %r" % suffix)
1695
except (ValueError, IndexError) as e:
2238
raise ValueError("Unknown suffix {!r}"
2239
.format(suffix))
2240
except IndexError as e:
1696
2241
raise ValueError(*(e.args))
1697
2242
timevalue += delta
1698
2243
return timevalue
1699
2244
1700
2245
1701
def if_nametoindex(interface):
1702
"""Call the C function if_nametoindex(), or equivalent
1703
1704
Note: This function cannot accept a unicode string."""
1705
global if_nametoindex
1706
try:
1707
if_nametoindex = (ctypes.cdll.LoadLibrary
1708
(ctypes.util.find_library("c"))
1709
.if_nametoindex)
1710
except (OSError, AttributeError):
1711
logger.warning("Doing if_nametoindex the hard way")
1712
def if_nametoindex(interface):
1713
"Get an interface index the hard way, i.e. using fcntl()"
1714
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1715
with contextlib.closing(socket.socket()) as s:
1716
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1717
struct.pack(str("16s16x"),
1718
interface))
1719
interface_index = struct.unpack(str("I"),
1720
ifreq[16:20])[0]
1721
return interface_index
1722
return if_nametoindex(interface)
1723
1724
1725
2246
def daemon(nochdir = False, noclose = False):
1726
2247
"""See daemon(3). Standard BSD Unix function.
1727
2248
1735
2256
sys.exit()
1736
2257
if not noclose:
1737
2258
# Close all standard open file descriptors
1738
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2259
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1739
2260
if not stat.S_ISCHR(os.fstat(null).st_mode):
1740
raise OSError(errno.ENODEV,
1741
"%s not a character device"
1742
% os.path.devnull)
2261
raise OSError(errno.ENODEV, "{} not a character device"
2262
.format(os.devnull))
1743
2263
os.dup2(null, sys.stdin.fileno())
1744
2264
os.dup2(null, sys.stdout.fileno())
1745
2265
os.dup2(null, sys.stderr.fileno())
1754
2274
1755
2275
parser = argparse.ArgumentParser()
1756
2276
parser.add_argument("-v", "--version", action="version",
1757
version = "%%(prog)s %s" % version,
2277
version = "%(prog)s {}".format(version),
1758
2278
help="show version number and exit")
1759
2279
parser.add_argument("-i", "--interface", metavar="IF",
1760
2280
help="Bind to interface IF")
1766
2286
help="Run self-test")
1767
2287
parser.add_argument("--debug", action="store_true",
1768
2288
help="Debug mode; run in foreground and log"
1769
" to terminal")
2289
" to terminal", default=None)
1770
2290
parser.add_argument("--debuglevel", metavar="LEVEL",
1771
2291
help="Debug level for stdout output")
1772
2292
parser.add_argument("--priority", help="GnuTLS"
1779
2299
" files")
1780
2300
parser.add_argument("--no-dbus", action="store_false",
1781
2301
dest="use_dbus", help="Do not provide D-Bus"
1782
" system bus interface")
2302
" system bus interface", default=None)
1783
2303
parser.add_argument("--no-ipv6", action="store_false",
1784
dest="use_ipv6", help="Do not use IPv6")
2304
dest="use_ipv6", help="Do not use IPv6",
2305
default=None)
2306
parser.add_argument("--no-restore", action="store_false",
2307
dest="restore", help="Do not restore stored"
2308
" state", default=None)
2309
parser.add_argument("--socket", type=int,
2310
help="Specify a file descriptor to a network"
2311
" socket to use instead of creating one")
2312
parser.add_argument("--statedir", metavar="DIR",
2313
help="Directory to save/restore state in")
2314
parser.add_argument("--foreground", action="store_true",
2315
help="Run in foreground", default=None)
2316
parser.add_argument("--no-zeroconf", action="store_false",
2317
dest="zeroconf", help="Do not use Zeroconf",
2318
default=None)
2319
1785
2320
options = parser.parse_args()
1786
2321
1787
2322
if options.check:
1788
2323
import doctest
1789
doctest.testmod()
1790
sys.exit()
2324
fail_count, test_count = doctest.testmod()
2325
sys.exit(os.EX_OK if fail_count == 0 else 1)
1791
2326
1792
2327
# Default values for config file for server-global settings
1793
2328
server_defaults = { "interface": "",
1795
2330
"port": "",
1796
2331
"debug": "False",
1797
2332
"priority":
1798
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2333
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1799
2334
"servicename": "Mandos",
1800
2335
"use_dbus": "True",
1801
2336
"use_ipv6": "True",
1802
2337
"debuglevel": "",
2338
"restore": "True",
2339
"socket": "",
2340
"statedir": "/var/lib/mandos",
2341
"foreground": "False",
2342
"zeroconf": "True",
1803
2343
}
1804
2344
1805
2345
# Parse config file for server-global settings
1810
2350
# Convert the SafeConfigParser object to a dict
1811
2351
server_settings = server_config.defaults()
1812
2352
# Use the appropriate methods on the non-string config options
1813
for option in ("debug", "use_dbus", "use_ipv6"):
2353
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1814
2354
server_settings[option] = server_config.getboolean("DEFAULT",
1815
2355
option)
1816
2356
if server_settings["port"]:
1817
2357
server_settings["port"] = server_config.getint("DEFAULT",
1818
2358
"port")
2359
if server_settings["socket"]:
2360
server_settings["socket"] = server_config.getint("DEFAULT",
2361
"socket")
2362
# Later, stdin will, and stdout and stderr might, be dup'ed
2363
# over with an opened os.devnull. But we don't want this to
2364
# happen with a supplied network socket.
2365
if 0 <= server_settings["socket"] <= 2:
2366
server_settings["socket"] = os.dup(server_settings
2367
["socket"])
1819
2368
del server_config
1820
2369
1821
2370
# Override the settings from the config file with command line
1822
2371
# options, if set.
1823
2372
for option in ("interface", "address", "port", "debug",
1824
2373
"priority", "servicename", "configdir",
1825
"use_dbus", "use_ipv6", "debuglevel"):
2374
"use_dbus", "use_ipv6", "debuglevel", "restore",
2375
"statedir", "socket", "foreground", "zeroconf"):
1826
2376
value = getattr(options, option)
1827
2377
if value is not None:
1828
2378
server_settings[option] = value
1829
2379
del options
1830
2380
# Force all strings to be unicode
1831
2381
for option in server_settings.keys():
1832
if type(server_settings[option]) is str:
1833
server_settings[option] = unicode(server_settings[option])
2382
if isinstance(server_settings[option], bytes):
2383
server_settings[option] = (server_settings[option]
2384
.decode("utf-8"))
2385
# Force all boolean options to be boolean
2386
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2387
"foreground", "zeroconf"):
2388
server_settings[option] = bool(server_settings[option])
2389
# Debug implies foreground
2390
if server_settings["debug"]:
2391
server_settings["foreground"] = True
1834
2392
# Now we have our good server settings in "server_settings"
1835
2393
1836
2394
##################################################################
1837
2395
2396
if (not server_settings["zeroconf"] and
2397
not (server_settings["port"]
2398
or server_settings["socket"] != "")):
2399
parser.error("Needs port or socket to work without"
2400
" Zeroconf")
2401
1838
2402
# For convenience
1839
2403
debug = server_settings["debug"]
1840
2404
debuglevel = server_settings["debuglevel"]
1841
2405
use_dbus = server_settings["use_dbus"]
1842
2406
use_ipv6 = server_settings["use_ipv6"]
1843
2407
stored_state_path = os.path.join(server_settings["statedir"],
2408
stored_state_file)
2409
foreground = server_settings["foreground"]
2410
zeroconf = server_settings["zeroconf"]
2411
2412
if debug:
2413
initlogger(debug, logging.DEBUG)
2414
else:
2415
if not debuglevel:
2416
initlogger(debug)
2417
else:
2418
level = getattr(logging, debuglevel.upper())
2419
initlogger(debug, level)
2420
1844
2421
if server_settings["servicename"] != "Mandos":
1845
2422
syslogger.setFormatter(logging.Formatter
1846
('Mandos (%s) [%%(process)d]:'
1847
' %%(levelname)s: %%(message)s'
1848
% server_settings["servicename"]))
2423
('Mandos ({}) [%(process)d]:'
2424
' %(levelname)s: %(message)s'
2425
.format(server_settings
2426
["servicename"])))
1849
2427
1850
2428
# Parse config file with clients
1851
client_defaults = { "timeout": "5m",
1852
"extended_timeout": "15m",
1853
"interval": "2m",
1854
"checker": "fping -q -- %%(host)s",
1855
"host": "",
1856
"approval_delay": "0s",
1857
"approval_duration": "1s",
1858
}
1859
client_config = configparser.SafeConfigParser(client_defaults)
2429
client_config = configparser.SafeConfigParser(Client
2430
.client_defaults)
1860
2431
client_config.read(os.path.join(server_settings["configdir"],
1861
2432
"clients.conf"))
1862
2433
1863
2434
global mandos_dbus_service
1864
2435
mandos_dbus_service = None
1865
2436
2437
socketfd = None
2438
if server_settings["socket"] != "":
2439
socketfd = server_settings["socket"]
1866
2440
tcp_server = MandosServer((server_settings["address"],
1867
2441
server_settings["port"]),
1868
2442
ClientHandler,
1871
2445
use_ipv6=use_ipv6,
1872
2446
gnutls_priority=
1873
2447
server_settings["priority"],
1874
use_dbus=use_dbus)
1875
if not debug:
1876
pidfilename = "/var/run/mandos.pid"
2448
use_dbus=use_dbus,
2449
socketfd=socketfd)
2450
if not foreground:
2451
pidfilename = "/run/mandos.pid"
2452
if not os.path.isdir("/run/."):
2453
pidfilename = "/var/run/mandos.pid"
2454
pidfile = None
1877
2455
try:
1878
2456
pidfile = open(pidfilename, "w")
1879
except IOError:
1880
logger.error("Could not open file %r", pidfilename)
2457
except IOError as e:
2458
logger.error("Could not open file %r", pidfilename,
2459
exc_info=e)
1881
2460
1882
try:
1883
uid = pwd.getpwnam("_mandos").pw_uid
1884
gid = pwd.getpwnam("_mandos").pw_gid
1885
except KeyError:
2461
for name in ("_mandos", "mandos", "nobody"):
1886
2462
try:
1887
uid = pwd.getpwnam("mandos").pw_uid
1888
gid = pwd.getpwnam("mandos").pw_gid
2463
uid = pwd.getpwnam(name).pw_uid
2464
gid = pwd.getpwnam(name).pw_gid
2465
break
1889
2466
except KeyError:
1890
try:
1891
uid = pwd.getpwnam("nobody").pw_uid
1892
gid = pwd.getpwnam("nobody").pw_gid
1893
except KeyError:
1894
uid = 65534
1895
gid = 65534
2467
continue
2468
else:
2469
uid = 65534
2470
gid = 65534
1896
2471
try:
1897
2472
os.setgid(gid)
1898
2473
os.setuid(uid)
1899
2474
except OSError as error:
1900
if error[0] != errno.EPERM:
1901
raise error
2475
if error.errno != errno.EPERM:
2476
raise
1902
2477
1903
if not debug and not debuglevel:
1904
syslogger.setLevel(logging.WARNING)
1905
console.setLevel(logging.WARNING)
1906
if debuglevel:
1907
level = getattr(logging, debuglevel.upper())
1908
syslogger.setLevel(level)
1909
console.setLevel(level)
1910
1911
2478
if debug:
1912
2479
# Enable all possible GnuTLS debugging
1913
2480
1923
2490
.gnutls_global_set_log_function(debug_gnutls))
1924
2491
1925
2492
# Redirect stdin so all checkers get /dev/null
1926
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2493
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1927
2494
os.dup2(null, sys.stdin.fileno())
1928
2495
if null > 2:
1929
2496
os.close(null)
1930
else:
1931
# No console logging
1932
logger.removeHandler(console)
1933
2497
1934
2498
# Need to fork before connecting to D-Bus
1935
if not debug:
2499
if not foreground:
1936
2500
# Close all input and output, do double fork, etc.
1937
2501
daemon()
1938
2502
2503
# multiprocessing will use threads, so before we use gobject we
2504
# need to inform gobject that threads will be used.
2505
gobject.threads_init()
2506
1939
2507
global main_loop
1940
2508
# From the Avahi example code
1941
DBusGMainLoop(set_as_default=True )
2509
DBusGMainLoop(set_as_default=True)
1942
2510
main_loop = gobject.MainLoop()
1943
2511
bus = dbus.SystemBus()
1944
2512
# End of Avahi example code
1945
2513
if use_dbus:
1946
2514
try:
1947
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
2515
bus_name = dbus.service.BusName("se.recompile.Mandos",
1948
2516
bus, do_not_queue=True)
2517
old_bus_name = (dbus.service.BusName
2518
("se.bsnet.fukt.Mandos", bus,
2519
do_not_queue=True))
1949
2520
except dbus.exceptions.NameExistsException as e:
1950
logger.error(unicode(e) + ", disabling D-Bus")
2521
logger.error("Disabling D-Bus:", exc_info=e)
1951
2522
use_dbus = False
1952
2523
server_settings["use_dbus"] = False
1953
2524
tcp_server.use_dbus = False
1954
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1955
service = AvahiService(name = server_settings["servicename"],
1956
servicetype = "_mandos._tcp",
1957
protocol = protocol, bus = bus)
1958
if server_settings["interface"]:
1959
service.interface = (if_nametoindex
1960
(str(server_settings["interface"])))
2525
if zeroconf:
2526
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2527
service = AvahiServiceToSyslog(name =
2528
server_settings["servicename"],
2529
servicetype = "_mandos._tcp",
2530
protocol = protocol, bus = bus)
2531
if server_settings["interface"]:
2532
service.interface = (if_nametoindex
2533
(server_settings["interface"]
2534
.encode("utf-8")))
1961
2535
1962
2536
global multiprocessing_manager
1963
2537
multiprocessing_manager = multiprocessing.Manager()
1965
2539
client_class = Client
1966
2540
if use_dbus:
1967
2541
client_class = functools.partial(ClientDBus, bus = bus)
1968
def client_config_items(config, section):
1969
special_settings = {
1970
"approved_by_default":
1971
lambda: config.getboolean(section,
1972
"approved_by_default"),
1973
}
1974
for name, value in config.items(section):
2542
2543
client_settings = Client.config_parser(client_config)
2544
old_client_settings = {}
2545
clients_data = {}
2546
2547
# This is used to redirect stdout and stderr for checker processes
2548
global wnull
2549
wnull = open(os.devnull, "w") # A writable /dev/null
2550
# Only used if server is running in foreground but not in debug
2551
# mode
2552
if debug or not foreground:
2553
wnull.close()
2554
2555
# Get client data and settings from last running state.
2556
if server_settings["restore"]:
2557
try:
2558
with open(stored_state_path, "rb") as stored_state:
2559
clients_data, old_client_settings = (pickle.load
2560
(stored_state))
2561
os.remove(stored_state_path)
2562
except IOError as e:
2563
if e.errno == errno.ENOENT:
2564
logger.warning("Could not load persistent state: {}"
2565
.format(os.strerror(e.errno)))
2566
else:
2567
logger.critical("Could not load persistent state:",
2568
exc_info=e)
2569
raise
2570
except EOFError as e:
2571
logger.warning("Could not load persistent state: "
2572
"EOFError:", exc_info=e)
2573
2574
with PGPEngine() as pgp:
2575
for client_name, client in clients_data.items():
2576
# Skip removed clients
2577
if client_name not in client_settings:
2578
continue
2579
2580
# Decide which value to use after restoring saved state.
2581
# We have three different values: Old config file,
2582
# new config file, and saved state.
2583
# New config value takes precedence if it differs from old
2584
# config value, otherwise use saved state.
2585
for name, value in client_settings[client_name].items():
2586
try:
2587
# For each value in new config, check if it
2588
# differs from the old config value (Except for
2589
# the "secret" attribute)
2590
if (name != "secret" and
2591
value != old_client_settings[client_name]
2592
[name]):
2593
client[name] = value
2594
except KeyError:
2595
pass
2596
2597
# Clients who has passed its expire date can still be
2598
# enabled if its last checker was successful. Clients
2599
# whose checker succeeded before we stored its state is
2600
# assumed to have successfully run all checkers during
2601
# downtime.
2602
if client["enabled"]:
2603
if datetime.datetime.utcnow() >= client["expires"]:
2604
if not client["last_checked_ok"]:
2605
logger.warning(
2606
"disabling client {} - Client never "
2607
"performed a successful checker"
2608
.format(client_name))
2609
client["enabled"] = False
2610
elif client["last_checker_status"] != 0:
2611
logger.warning(
2612
"disabling client {} - Client last"
2613
" checker failed with error code {}"
2614
.format(client_name,
2615
client["last_checker_status"]))
2616
client["enabled"] = False
2617
else:
2618
client["expires"] = (datetime.datetime
2619
.utcnow()
2620
+ client["timeout"])
2621
logger.debug("Last checker succeeded,"
2622
" keeping {} enabled"
2623
.format(client_name))
1975
2624
try:
1976
yield (name, special_settings[name]())
1977
except KeyError:
1978
yield (name, value)
1979
1980
tcp_server.clients.update(set(
1981
client_class(name = section,
1982
config= dict(client_config_items(
1983
client_config, section)))
1984
for section in client_config.sections()))
2625
client["secret"] = (
2626
pgp.decrypt(client["encrypted_secret"],
2627
client_settings[client_name]
2628
["secret"]))
2629
except PGPError:
2630
# If decryption fails, we use secret from new settings
2631
logger.debug("Failed to decrypt {} old secret"
2632
.format(client_name))
2633
client["secret"] = (
2634
client_settings[client_name]["secret"])
2635
2636
# Add/remove clients based on new changes made to config
2637
for client_name in (set(old_client_settings)
2638
- set(client_settings)):
2639
del clients_data[client_name]
2640
for client_name in (set(client_settings)
2641
- set(old_client_settings)):
2642
clients_data[client_name] = client_settings[client_name]
2643
2644
# Create all client objects
2645
for client_name, client in clients_data.items():
2646
tcp_server.clients[client_name] = client_class(
2647
name = client_name, settings = client,
2648
server_settings = server_settings)
2649
1985
2650
if not tcp_server.clients:
1986
2651
logger.warning("No clients defined")
1987
1988
if not debug:
1989
try:
1990
with pidfile:
1991
pid = os.getpid()
1992
pidfile.write(str(pid) + "\n".encode("utf-8"))
1993
del pidfile
1994
except IOError:
1995
logger.error("Could not write to file %r with PID %d",
1996
pidfilename, pid)
1997
except NameError:
1998
# "pidfile" was never created
1999
pass
2652
2653
if not foreground:
2654
if pidfile is not None:
2655
try:
2656
with pidfile:
2657
pid = os.getpid()
2658
pidfile.write("{}\n".format(pid).encode("utf-8"))
2659
except IOError:
2660
logger.error("Could not write to file %r with PID %d",
2661
pidfilename, pid)
2662
del pidfile
2000
2663
del pidfilename
2001
2002
signal.signal(signal.SIGINT, signal.SIG_IGN)
2003
2664
2004
2665
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2005
2666
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2006
2667
2007
2668
if use_dbus:
2008
class MandosDBusService(dbus.service.Object):
2669
@alternate_dbus_interfaces({"se.recompile.Mandos":
2670
"se.bsnet.fukt.Mandos"})
2671
class MandosDBusService(DBusObjectWithProperties):
2009
2672
"""A D-Bus proxy object"""
2010
2673
def __init__(self):
2011
2674
dbus.service.Object.__init__(self, bus, "/")
2012
_interface = "se.bsnet.fukt.Mandos"
2675
_interface = "se.recompile.Mandos"
2676
2677
@dbus_interface_annotations(_interface)
2678
def _foo(self):
2679
return { "org.freedesktop.DBus.Property"
2680
".EmitsChangedSignal":
2681
"false"}
2013
2682
2014
2683
@dbus.service.signal(_interface, signature="o")
2015
2684
def ClientAdded(self, objpath):
2030
2699
def GetAllClients(self):
2031
2700
"D-Bus method"
2032
2701
return dbus.Array(c.dbus_object_path
2033
for c in tcp_server.clients)
2702
for c in
2703
tcp_server.clients.itervalues())
2034
2704
2035
2705
@dbus.service.method(_interface,
2036
2706
out_signature="a{oa{sv}}")
2038
2708
"D-Bus method"
2039
2709
return dbus.Dictionary(
2040
2710
((c.dbus_object_path, c.GetAll(""))
2041
for c in tcp_server.clients),
2711
for c in tcp_server.clients.itervalues()),
2042
2712
signature="oa{sv}")
2043
2713
2044
2714
@dbus.service.method(_interface, in_signature="o")
2045
2715
def RemoveClient(self, object_path):
2046
2716
"D-Bus method"
2047
for c in tcp_server.clients:
2717
for c in tcp_server.clients.itervalues():
2048
2718
if c.dbus_object_path == object_path:
2049
tcp_server.clients.remove(c)
2719
del tcp_server.clients[c.name]
2050
2720
c.remove_from_connection()
2051
2721
# Don't signal anything except ClientRemoved
2052
2722
c.disable(quiet=True)
2061
2731
2062
2732
def cleanup():
2063
2733
"Cleanup function; run on exit"
2064
service.cleanup()
2065
2734
if zeroconf:
2735
service.cleanup()
2736
2737
multiprocessing.active_children()
2738
wnull.close()
2739
if not (tcp_server.clients or client_settings):
2740
return
2741
2742
# Store client before exiting. Secrets are encrypted with key
2743
# based on what config file has. If config file is
2744
# removed/edited, old secret will thus be unrecovable.
2745
clients = {}
2746
with PGPEngine() as pgp:
2747
for client in tcp_server.clients.itervalues():
2748
key = client_settings[client.name]["secret"]
2749
client.encrypted_secret = pgp.encrypt(client.secret,
2750
key)
2751
client_dict = {}
2752
2753
# A list of attributes that can not be pickled
2754
# + secret.
2755
exclude = { "bus", "changedstate", "secret",
2756
"checker", "server_settings" }
2757
for name, typ in (inspect.getmembers
2758
(dbus.service.Object)):
2759
exclude.add(name)
2760
2761
client_dict["encrypted_secret"] = (client
2762
.encrypted_secret)
2763
for attr in client.client_structure:
2764
if attr not in exclude:
2765
client_dict[attr] = getattr(client, attr)
2766
2767
clients[client.name] = client_dict
2768
del client_settings[client.name]["secret"]
2769
2770
try:
2771
with (tempfile.NamedTemporaryFile
2772
(mode='wb', suffix=".pickle", prefix='clients-',
2773
dir=os.path.dirname(stored_state_path),
2774
delete=False)) as stored_state:
2775
pickle.dump((clients, client_settings), stored_state)
2776
tempname=stored_state.name
2777
os.rename(tempname, stored_state_path)
2778
except (IOError, OSError) as e:
2779
if not debug:
2780
try:
2781
os.remove(tempname)
2782
except NameError:
2783
pass
2784
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2785
logger.warning("Could not save persistent state: {}"
2786
.format(os.strerror(e.errno)))
2787
else:
2788
logger.warning("Could not save persistent state:",
2789
exc_info=e)
2790
raise
2791
2792
# Delete all clients, and settings from config
2066
2793
while tcp_server.clients:
2067
client = tcp_server.clients.pop()
2794
name, client = tcp_server.clients.popitem()
2068
2795
if use_dbus:
2069
2796
client.remove_from_connection()
2070
client.disable_hook = None
2071
2797
# Don't signal anything except ClientRemoved
2072
2798
client.disable(quiet=True)
2073
2799
if use_dbus:
2074
2800
# Emit D-Bus signal
2075
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2801
mandos_dbus_service.ClientRemoved(client
2802
.dbus_object_path,
2076
2803
client.name)
2804
client_settings.clear()
2077
2805
2078
2806
atexit.register(cleanup)
2079
2807
2080
for client in tcp_server.clients:
2808
for client in tcp_server.clients.itervalues():
2081
2809
if use_dbus:
2082
2810
# Emit D-Bus signal
2083
2811
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2084
client.enable()
2812
# Need to initiate checking of clients
2813
if client.enabled:
2814
client.init_checker()
2085
2815
2086
2816
tcp_server.enable()
2087
2817
tcp_server.server_activate()
2088
2818
2089
2819
# Find out what port we got
2090
service.port = tcp_server.socket.getsockname()[1]
2820
if zeroconf:
2821
service.port = tcp_server.socket.getsockname()[1]
2091
2822
if use_ipv6:
2092
2823
logger.info("Now listening on address %r, port %d,"
2093
" flowinfo %d, scope_id %d"
2094
% tcp_server.socket.getsockname())
2824
" flowinfo %d, scope_id %d",
2825
*tcp_server.socket.getsockname())
2095
2826
else: # IPv4
2096
logger.info("Now listening on address %r, port %d"
2097
% tcp_server.socket.getsockname())
2827
logger.info("Now listening on address %r, port %d",
2828
*tcp_server.socket.getsockname())
2098
2829
2099
2830
#service.interface = tcp_server.socket.getsockname()[3]
2100
2831
2101
2832
try:
2102
# From the Avahi example code
2103
try:
2104
service.activate()
2105
except dbus.exceptions.DBusException as error:
2106
logger.critical("DBusException: %s", error)
2107
cleanup()
2108
sys.exit(1)
2109
# End of Avahi example code
2833
if zeroconf:
2834
# From the Avahi example code
2835
try:
2836
service.activate()
2837
except dbus.exceptions.DBusException as error:
2838
logger.critical("D-Bus Exception", exc_info=error)
2839
cleanup()
2840
sys.exit(1)
2841
# End of Avahi example code
2110
2842
2111
2843
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2112
2844
lambda *args, **kwargs:
2116
2848
logger.debug("Starting main loop")
2117
2849
main_loop.run()
2118
2850
except AvahiError as error:
2119
logger.critical("AvahiError: %s", error)
2851
logger.critical("Avahi Error", exc_info=error)
2120
2852
cleanup()
2121
2853
sys.exit(1)
2122
2854
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0