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- Committer: Teddy Hogeborn
- Date: 2014-10-05 19:39:25 UTC
- Revision ID: teddy@recompile.se-20141005193925-jjqx2n2dt3icy28u
* mandos.service ([Unit]/Documentation): New.
- files added:
- debian/mandos-client.examples
- debian/upstream
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python
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#!/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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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 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 = "1.4.1"
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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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if sys.version_info.major == 2:
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str = unicode
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version = "1.6.8"
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stored_state_file = "clients.pickle"
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logger = logging.getLogger()
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syslogger = None
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100
try:
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if_nametoindex = (ctypes.cdll.LoadLibrary
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(ctypes.util.find_library("c"))
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.if_nametoindex)
104
except (OSError, AttributeError):
105
def if_nametoindex(interface):
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"Get an interface index the hard way, i.e. using fcntl()"
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SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
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with contextlib.closing(socket.socket()) as s:
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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
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struct.pack(b"16s16x", interface))
111
interface_index = struct.unpack("I", ifreq[16:20])[0]
112
return interface_index
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114
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def initlogger(debug, level=logging.WARNING):
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"""init logger and add loglevel"""
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global syslogger
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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:'
125
' %(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"""
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pass
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class PGPEngine(object):
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"""A simple class for OpenPGP symmetric encryption & decryption"""
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def __init__(self):
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self.tempdir = tempfile.mkdtemp(prefix="mandos-")
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self.gnupgargs = ['--batch',
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'--home', self.tempdir,
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'--force-mdc',
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'--quiet',
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'--no-use-agent']
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def __enter__(self):
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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):
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# Passphrase can not be empty and can not contain newlines or
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# NUL bytes. So we prefix it and hex encode it.
179
encoded = b"mandos" + binascii.hexlify(password)
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if len(encoded) > 2048:
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# GnuPG can't handle long passwords, so encode differently
182
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
183
.replace(b"\n", b"\\n")
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.replace(b"\0", b"\\x00"))
185
return encoded
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def encrypt(self, data, password):
188
passphrase = self.password_encode(password)
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with tempfile.NamedTemporaryFile(dir=self.tempdir
190
) as passfile:
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passfile.write(passphrase)
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passfile.flush()
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proc = subprocess.Popen(['gpg', '--symmetric',
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'--passphrase-file',
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passfile.name]
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+ self.gnupgargs,
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stdin = subprocess.PIPE,
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stdout = subprocess.PIPE,
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stderr = subprocess.PIPE)
200
ciphertext, err = proc.communicate(input = data)
201
if proc.returncode != 0:
202
raise PGPError(err)
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return ciphertext
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def decrypt(self, data, password):
206
passphrase = self.password_encode(password)
207
with tempfile.NamedTemporaryFile(dir = self.tempdir
208
) as passfile:
209
passfile.write(passphrase)
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passfile.flush()
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proc = subprocess.Popen(['gpg', '--decrypt',
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'--passphrase-file',
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passfile.name]
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+ self.gnupgargs,
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stdin = subprocess.PIPE,
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stdout = subprocess.PIPE,
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stderr = subprocess.PIPE)
218
decrypted_plaintext, err = proc.communicate(input
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= data)
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if proc.returncode != 0:
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raise PGPError(err)
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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
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super(AvahiError, self).__init__(value, *args, **kwargs)
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def __unicode__(self):
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return unicode(repr(self.value))
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return super(AvahiError, self).__init__(value, *args,
229
**kwargs)
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class AvahiServiceError(AvahiError):
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pass
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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>
246
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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255
server: D-Bus Server
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bus: dbus.SystemBus()
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"""
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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
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self.entry_group_state_changed_match = None
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def rename(self):
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"""Derived from the Avahi example code"""
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if self.rename_count >= self.max_renames:
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" after %i retries, exiting.",
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self.rename_count)
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raise AvahiServiceError("Too many renames")
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self.name = unicode(self.server
164
.GetAlternativeServiceName(self.name))
285
self.name = str(self.server
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.GetAlternativeServiceName(self.name))
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logger.info("Changing Zeroconf service name to %r ...",
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self.name)
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syslogger.setFormatter(logging.Formatter
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('Mandos (%s) [%%(process)d]:'
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' %%(levelname)s: %%(message)s'
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% self.name))
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self.remove()
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try:
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self.add()
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except dbus.exceptions.DBusException as error:
175
logger.critical("DBusException: %s", error)
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logger.critical("D-Bus Exception", exc_info=error)
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self.cleanup()
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os._exit(1)
178
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self.rename_count += 1
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179
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def remove(self):
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"""Derived from the Avahi example code"""
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if self.entry_group_state_changed_match is not None:
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self.entry_group_state_changed_match = None
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if self.group is not None:
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304
self.group.Reset()
305
186
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def add(self):
187
307
"""Derived from the Avahi example code"""
188
308
self.remove()
193
313
avahi.DBUS_INTERFACE_ENTRY_GROUP)
194
314
self.entry_group_state_changed_match = (
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315
self.group.connect_to_signal(
196
'StateChanged', self .entry_group_state_changed))
316
'StateChanged', self.entry_group_state_changed))
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logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
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self.name, self.type)
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319
self.group.AddService(
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dbus.UInt16(self.port),
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326
avahi.string_array_to_txt_array(self.TXT))
207
327
self.group.Commit()
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def entry_group_state_changed(self, state, error):
209
330
"""Derived from the Avahi example code"""
210
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logger.debug("Avahi entry group state change: %i", state)
216
337
self.rename()
217
338
elif state == avahi.ENTRY_GROUP_FAILURE:
218
339
logger.critical("Avahi: Error in group state changed %s",
219
unicode(error))
220
raise AvahiGroupError("State changed: %s"
221
% unicode(error))
340
str(error))
341
raise AvahiGroupError("State changed: {!s}"
342
.format(error))
343
222
344
def cleanup(self):
223
345
"""Derived from the Avahi example code"""
224
346
if self.group is not None:
225
347
try:
226
348
self.group.Free()
227
349
except (dbus.exceptions.UnknownMethodException,
228
dbus.exceptions.DBusException) as e:
350
dbus.exceptions.DBusException):
229
351
pass
230
352
self.group = None
231
353
self.remove()
354
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def server_state_changed(self, state, error=None):
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"""Derived from the Avahi example code"""
234
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logger.debug("Avahi server state change: %i", state)
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376
logger.debug("Unknown state: %r", state)
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377
else:
255
378
logger.debug("Unknown state: %r: %r", state, error)
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256
380
def activate(self):
257
381
"""Derived from the Avahi example code"""
258
382
if self.server is None:
266
390
self.server_state_changed(self.server.GetState())
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391
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392
269
def _timedelta_to_milliseconds(td):
270
"Convert a datetime.timedelta() to milliseconds"
271
return ((td.days * 24 * 60 * 60 * 1000)
272
+ (td.seconds * 1000)
273
+ (td.microseconds // 1000))
274
393
class AvahiServiceToSyslog(AvahiService):
394
def rename(self):
395
"""Add the new name to the syslog messages"""
396
ret = AvahiService.rename(self)
397
syslogger.setFormatter(logging.Formatter
398
('Mandos ({}) [%(process)d]:'
399
' %(levelname)s: %(message)s'
400
.format(self.name)))
401
return ret
402
403
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404
class Client(object):
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405
"""A representation of a client host served by this server.
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406
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407
Attributes:
279
_approved: bool(); 'None' if not yet approved/disapproved
408
approved: bool(); 'None' if not yet approved/disapproved
280
409
approval_delay: datetime.timedelta(); Time to wait for approval
281
410
approval_duration: datetime.timedelta(); Duration of one approval
282
411
checker: subprocess.Popen(); a running checker process used
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418
instance %(name)s can be used in the command.
290
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checker_initiator_tag: a gobject event source tag, or None
291
420
created: datetime.datetime(); (UTC) object creation
421
client_structure: Object describing what attributes a client has
422
and is used for storing the client at exit
292
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current_checker_command: string; current running checker_command
293
disable_hook: If set, called by disable() as disable_hook(self)
294
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disable_initiator_tag: a gobject event source tag, or None
295
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enabled: bool()
296
426
fingerprint: string (40 or 32 hexadecimal digits); used to
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429
interval: datetime.timedelta(); How often to start a new checker
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430
last_approval_request: datetime.datetime(); (UTC) or None
301
431
last_checked_ok: datetime.datetime(); (UTC) or None
302
last_enabled: datetime.datetime(); (UTC)
432
last_checker_status: integer between 0 and 255 reflecting exit
433
status of last checker. -1 reflects crashed
434
checker, -2 means no checker completed yet.
435
last_enabled: datetime.datetime(); (UTC) or None
303
436
name: string; from the config file, used in log messages and
304
437
D-Bus identifiers
305
438
secret: bytestring; sent verbatim (over TLS) to client
306
439
timeout: datetime.timedelta(); How long from last_checked_ok
307
440
until this client is disabled
308
extended_timeout: extra long timeout when password has been sent
441
extended_timeout: extra long timeout when secret has been sent
309
442
runtime_expansions: Allowed attributes for runtime expansion.
310
443
expires: datetime.datetime(); time (UTC) when a client will be
311
444
disabled, or None
445
server_settings: The server_settings dict from main()
312
446
"""
313
447
314
448
runtime_expansions = ("approval_delay", "approval_duration",
315
"created", "enabled", "fingerprint",
316
"host", "interval", "last_checked_ok",
449
"created", "enabled", "expires",
450
"fingerprint", "host", "interval",
451
"last_approval_request", "last_checked_ok",
317
452
"last_enabled", "name", "timeout")
318
319
def timeout_milliseconds(self):
320
"Return the 'timeout' attribute in milliseconds"
321
return _timedelta_to_milliseconds(self.timeout)
322
323
def extended_timeout_milliseconds(self):
324
"Return the 'extended_timeout' attribute in milliseconds"
325
return _timedelta_to_milliseconds(self.extended_timeout)
326
327
def interval_milliseconds(self):
328
"Return the 'interval' attribute in milliseconds"
329
return _timedelta_to_milliseconds(self.interval)
330
331
def approval_delay_milliseconds(self):
332
return _timedelta_to_milliseconds(self.approval_delay)
333
334
def __init__(self, name = None, disable_hook=None, config=None):
335
"""Note: the 'checker' key in 'config' sets the
336
'checker_command' attribute and *not* the 'checker'
337
attribute."""
453
client_defaults = { "timeout": "PT5M",
454
"extended_timeout": "PT15M",
455
"interval": "PT2M",
456
"checker": "fping -q -- %%(host)s",
457
"host": "",
458
"approval_delay": "PT0S",
459
"approval_duration": "PT1S",
460
"approved_by_default": "True",
461
"enabled": "True",
462
}
463
464
@staticmethod
465
def config_parser(config):
466
"""Construct a new dict of client settings of this form:
467
{ client_name: {setting_name: value, ...}, ...}
468
with exceptions for any special settings as defined above.
469
NOTE: Must be a pure function. Must return the same result
470
value given the same arguments.
471
"""
472
settings = {}
473
for client_name in config.sections():
474
section = dict(config.items(client_name))
475
client = settings[client_name] = {}
476
477
client["host"] = section["host"]
478
# Reformat values from string types to Python types
479
client["approved_by_default"] = config.getboolean(
480
client_name, "approved_by_default")
481
client["enabled"] = config.getboolean(client_name,
482
"enabled")
483
484
client["fingerprint"] = (section["fingerprint"].upper()
485
.replace(" ", ""))
486
if "secret" in section:
487
client["secret"] = section["secret"].decode("base64")
488
elif "secfile" in section:
489
with open(os.path.expanduser(os.path.expandvars
490
(section["secfile"])),
491
"rb") as secfile:
492
client["secret"] = secfile.read()
493
else:
494
raise TypeError("No secret or secfile for section {}"
495
.format(section))
496
client["timeout"] = string_to_delta(section["timeout"])
497
client["extended_timeout"] = string_to_delta(
498
section["extended_timeout"])
499
client["interval"] = string_to_delta(section["interval"])
500
client["approval_delay"] = string_to_delta(
501
section["approval_delay"])
502
client["approval_duration"] = string_to_delta(
503
section["approval_duration"])
504
client["checker_command"] = section["checker"]
505
client["last_approval_request"] = None
506
client["last_checked_ok"] = None
507
client["last_checker_status"] = -2
508
509
return settings
510
511
def __init__(self, settings, name = None, server_settings=None):
338
512
self.name = name
339
if config is None:
340
config = {}
513
if server_settings is None:
514
server_settings = {}
515
self.server_settings = server_settings
516
# adding all client settings
517
for setting, value in settings.items():
518
setattr(self, setting, value)
519
520
if self.enabled:
521
if not hasattr(self, "last_enabled"):
522
self.last_enabled = datetime.datetime.utcnow()
523
if not hasattr(self, "expires"):
524
self.expires = (datetime.datetime.utcnow()
525
+ self.timeout)
526
else:
527
self.last_enabled = None
528
self.expires = None
529
341
530
logger.debug("Creating client %r", self.name)
342
531
# Uppercase and remove spaces from fingerprint for later
343
532
# comparison purposes with return value from the fingerprint()
344
533
# function
345
self.fingerprint = (config["fingerprint"].upper()
346
.replace(" ", ""))
347
534
logger.debug(" Fingerprint: %s", self.fingerprint)
348
if "secret" in config:
349
self.secret = config["secret"].decode("base64")
350
elif "secfile" in config:
351
with open(os.path.expanduser(os.path.expandvars
352
(config["secfile"])),
353
"rb") as secfile:
354
self.secret = secfile.read()
355
else:
356
raise TypeError("No secret or secfile for client %s"
357
% self.name)
358
self.host = config.get("host", "")
359
self.created = datetime.datetime.utcnow()
360
self.enabled = False
361
self.last_approval_request = None
362
self.last_enabled = None
363
self.last_checked_ok = None
364
self.timeout = string_to_delta(config["timeout"])
365
self.extended_timeout = string_to_delta(config
366
["extended_timeout"])
367
self.interval = string_to_delta(config["interval"])
368
self.disable_hook = disable_hook
535
self.created = settings.get("created",
536
datetime.datetime.utcnow())
537
538
# attributes specific for this server instance
369
539
self.checker = None
370
540
self.checker_initiator_tag = None
371
541
self.disable_initiator_tag = None
372
self.expires = None
373
542
self.checker_callback_tag = None
374
self.checker_command = config["checker"]
375
543
self.current_checker_command = None
376
self.last_connect = None
377
self._approved = None
378
self.approved_by_default = config.get("approved_by_default",
379
True)
544
self.approved = None
380
545
self.approvals_pending = 0
381
self.approval_delay = string_to_delta(
382
config["approval_delay"])
383
self.approval_duration = string_to_delta(
384
config["approval_duration"])
385
546
self.changedstate = (multiprocessing_manager
386
547
.Condition(multiprocessing_manager
387
548
.Lock()))
549
self.client_structure = [attr for attr in
550
self.__dict__.iterkeys()
551
if not attr.startswith("_")]
552
self.client_structure.append("client_structure")
553
554
for name, t in inspect.getmembers(type(self),
555
lambda obj:
556
isinstance(obj,
557
property)):
558
if not name.startswith("_"):
559
self.client_structure.append(name)
388
560
561
# Send notice to process children that client state has changed
389
562
def send_changedstate(self):
390
self.changedstate.acquire()
391
self.changedstate.notify_all()
392
self.changedstate.release()
563
with self.changedstate:
564
self.changedstate.notify_all()
393
565
394
566
def enable(self):
395
567
"""Start this client's checker and timeout hooks"""
396
568
if getattr(self, "enabled", False):
397
569
# Already enabled
398
570
return
399
self.send_changedstate()
400
# Schedule a new checker to be started an 'interval' from now,
401
# and every interval from then on.
402
self.checker_initiator_tag = (gobject.timeout_add
403
(self.interval_milliseconds(),
404
self.start_checker))
405
# Schedule a disable() when 'timeout' has passed
406
571
self.expires = datetime.datetime.utcnow() + self.timeout
407
self.disable_initiator_tag = (gobject.timeout_add
408
(self.timeout_milliseconds(),
409
self.disable))
410
572
self.enabled = True
411
573
self.last_enabled = datetime.datetime.utcnow()
412
# Also start a new checker *right now*.
413
self.start_checker()
574
self.init_checker()
575
self.send_changedstate()
414
576
415
577
def disable(self, quiet=True):
416
578
"""Disable this client."""
417
579
if not getattr(self, "enabled", False):
418
580
return False
419
581
if not quiet:
420
self.send_changedstate()
421
if not quiet:
422
582
logger.info("Disabling client %s", self.name)
423
if getattr(self, "disable_initiator_tag", False):
583
if getattr(self, "disable_initiator_tag", None) is not None:
424
584
gobject.source_remove(self.disable_initiator_tag)
425
585
self.disable_initiator_tag = None
426
586
self.expires = None
427
if getattr(self, "checker_initiator_tag", False):
587
if getattr(self, "checker_initiator_tag", None) is not None:
428
588
gobject.source_remove(self.checker_initiator_tag)
429
589
self.checker_initiator_tag = None
430
590
self.stop_checker()
431
if self.disable_hook:
432
self.disable_hook(self)
433
591
self.enabled = False
592
if not quiet:
593
self.send_changedstate()
434
594
# Do not run this again if called by a gobject.timeout_add
435
595
return False
436
596
437
597
def __del__(self):
438
self.disable_hook = None
439
598
self.disable()
440
599
600
def init_checker(self):
601
# Schedule a new checker to be started an 'interval' from now,
602
# and every interval from then on.
603
if self.checker_initiator_tag is not None:
604
gobject.source_remove(self.checker_initiator_tag)
605
self.checker_initiator_tag = (gobject.timeout_add
606
(int(self.interval
607
.total_seconds() * 1000),
608
self.start_checker))
609
# Schedule a disable() when 'timeout' has passed
610
if self.disable_initiator_tag is not None:
611
gobject.source_remove(self.disable_initiator_tag)
612
self.disable_initiator_tag = (gobject.timeout_add
613
(int(self.timeout
614
.total_seconds() * 1000),
615
self.disable))
616
# Also start a new checker *right now*.
617
self.start_checker()
618
441
619
def checker_callback(self, pid, condition, command):
442
620
"""The checker has completed, so take appropriate actions."""
443
621
self.checker_callback_tag = None
444
622
self.checker = None
445
623
if os.WIFEXITED(condition):
446
exitstatus = os.WEXITSTATUS(condition)
447
if exitstatus == 0:
624
self.last_checker_status = os.WEXITSTATUS(condition)
625
if self.last_checker_status == 0:
448
626
logger.info("Checker for %(name)s succeeded",
449
627
vars(self))
450
628
self.checked_ok()
452
630
logger.info("Checker for %(name)s failed",
453
631
vars(self))
454
632
else:
633
self.last_checker_status = -1
455
634
logger.warning("Checker for %(name)s crashed?",
456
635
vars(self))
457
636
458
def checked_ok(self, timeout=None):
459
"""Bump up the timeout for this client.
460
461
This should only be called when the client has been seen,
462
alive and well.
463
"""
637
def checked_ok(self):
638
"""Assert that the client has been seen, alive and well."""
639
self.last_checked_ok = datetime.datetime.utcnow()
640
self.last_checker_status = 0
641
self.bump_timeout()
642
643
def bump_timeout(self, timeout=None):
644
"""Bump up the timeout for this client."""
464
645
if timeout is None:
465
646
timeout = self.timeout
466
self.last_checked_ok = datetime.datetime.utcnow()
467
647
if self.disable_initiator_tag is not None:
468
648
gobject.source_remove(self.disable_initiator_tag)
649
self.disable_initiator_tag = None
469
650
if getattr(self, "enabled", False):
470
651
self.disable_initiator_tag = (gobject.timeout_add
471
(_timedelta_to_milliseconds
472
(timeout), self.disable))
652
(int(timeout.total_seconds()
653
* 1000), self.disable))
473
654
self.expires = datetime.datetime.utcnow() + timeout
474
655
475
656
def need_approval(self):
481
662
If a checker already exists, leave it running and do
482
663
nothing."""
483
664
# The reason for not killing a running checker is that if we
484
# did that, then if a checker (for some reason) started
485
# running slowly and taking more than 'interval' time, the
486
# client would inevitably timeout, since no checker would get
487
# a chance to run to completion. If we instead leave running
665
# did that, and if a checker (for some reason) started running
666
# slowly and taking more than 'interval' time, then the client
667
# would inevitably timeout, since no checker would get a
668
# chance to run to completion. If we instead leave running
488
669
# checkers alone, the checker would have to take more time
489
670
# than 'timeout' for the client to be disabled, which is as it
490
671
# should be.
492
673
# If a checker exists, make sure it is not a zombie
493
674
try:
494
675
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
495
except (AttributeError, OSError) as error:
496
if (isinstance(error, OSError)
497
and error.errno != errno.ECHILD):
498
raise error
676
except AttributeError:
677
pass
678
except OSError as error:
679
if error.errno != errno.ECHILD:
680
raise
499
681
else:
500
682
if pid:
501
683
logger.warning("Checker was a zombie")
504
686
self.current_checker_command)
505
687
# Start a new checker if needed
506
688
if self.checker is None:
689
# Escape attributes for the shell
690
escaped_attrs = { attr:
691
re.escape(str(getattr(self, attr)))
692
for attr in self.runtime_expansions }
507
693
try:
508
# In case checker_command has exactly one % operator
509
command = self.checker_command % self.host
510
except TypeError:
511
# Escape attributes for the shell
512
escaped_attrs = dict(
513
(attr,
514
re.escape(unicode(str(getattr(self, attr, "")),
515
errors=
516
'replace')))
517
for attr in
518
self.runtime_expansions)
519
520
try:
521
command = self.checker_command % escaped_attrs
522
except TypeError as error:
523
logger.error('Could not format string "%s":'
524
' %s', self.checker_command, error)
525
return True # Try again later
694
command = self.checker_command % escaped_attrs
695
except TypeError as error:
696
logger.error('Could not format string "%s"',
697
self.checker_command, exc_info=error)
698
return True # Try again later
526
699
self.current_checker_command = command
527
700
try:
528
701
logger.info("Starting checker %r for %s",
531
704
# in normal mode, that is already done by daemon(),
532
705
# and in debug mode we don't want to. (Stdin is
533
706
# always replaced by /dev/null.)
707
# The exception is when not debugging but nevertheless
708
# running in the foreground; use the previously
709
# created wnull.
710
popen_args = {}
711
if (not self.server_settings["debug"]
712
and self.server_settings["foreground"]):
713
popen_args.update({"stdout": wnull,
714
"stderr": wnull })
534
715
self.checker = subprocess.Popen(command,
535
716
close_fds=True,
536
shell=True, cwd="/")
537
self.checker_callback_tag = (gobject.child_watch_add
538
(self.checker.pid,
539
self.checker_callback,
540
data=command))
541
# The checker may have completed before the gobject
542
# watch was added. Check for this.
717
shell=True, cwd="/",
718
**popen_args)
719
except OSError as error:
720
logger.error("Failed to start subprocess",
721
exc_info=error)
722
return True
723
self.checker_callback_tag = (gobject.child_watch_add
724
(self.checker.pid,
725
self.checker_callback,
726
data=command))
727
# The checker may have completed before the gobject
728
# watch was added. Check for this.
729
try:
543
730
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
544
if pid:
545
gobject.source_remove(self.checker_callback_tag)
546
self.checker_callback(pid, status, command)
547
731
except OSError as error:
548
logger.error("Failed to start subprocess: %s",
549
error)
732
if error.errno == errno.ECHILD:
733
# This should never happen
734
logger.error("Child process vanished",
735
exc_info=error)
736
return True
737
raise
738
if pid:
739
gobject.source_remove(self.checker_callback_tag)
740
self.checker_callback(pid, status, command)
550
741
# Re-run this periodically if run by gobject.timeout_add
551
742
return True
552
743
559
750
return
560
751
logger.debug("Stopping checker for %(name)s", vars(self))
561
752
try:
562
os.kill(self.checker.pid, signal.SIGTERM)
753
self.checker.terminate()
563
754
#time.sleep(0.5)
564
755
#if self.checker.poll() is None:
565
# os.kill(self.checker.pid, signal.SIGKILL)
756
# self.checker.kill()
566
757
except OSError as error:
567
758
if error.errno != errno.ESRCH: # No such process
568
759
raise
585
776
# "Set" method, so we fail early here:
586
777
if byte_arrays and signature != "ay":
587
778
raise ValueError("Byte arrays not supported for non-'ay'"
588
" signature %r" % signature)
779
" signature {!r}".format(signature))
589
780
def decorator(func):
590
781
func._dbus_is_property = True
591
782
func._dbus_interface = dbus_interface
599
790
return decorator
600
791
601
792
793
def dbus_interface_annotations(dbus_interface):
794
"""Decorator for marking functions returning interface annotations
795
796
Usage:
797
798
@dbus_interface_annotations("org.example.Interface")
799
def _foo(self): # Function name does not matter
800
return {"org.freedesktop.DBus.Deprecated": "true",
801
"org.freedesktop.DBus.Property.EmitsChangedSignal":
802
"false"}
803
"""
804
def decorator(func):
805
func._dbus_is_interface = True
806
func._dbus_interface = dbus_interface
807
func._dbus_name = dbus_interface
808
return func
809
return decorator
810
811
812
def dbus_annotations(annotations):
813
"""Decorator to annotate D-Bus methods, signals or properties
814
Usage:
815
816
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
817
"org.freedesktop.DBus.Property."
818
"EmitsChangedSignal": "false"})
819
@dbus_service_property("org.example.Interface", signature="b",
820
access="r")
821
def Property_dbus_property(self):
822
return dbus.Boolean(False)
823
"""
824
def decorator(func):
825
func._dbus_annotations = annotations
826
return func
827
return decorator
828
829
602
830
class DBusPropertyException(dbus.exceptions.DBusException):
603
831
"""A base class for D-Bus property-related exceptions
604
832
"""
605
def __unicode__(self):
606
return unicode(str(self))
607
833
pass
608
834
609
835
class DBusPropertyAccessException(DBusPropertyException):
610
836
"""A property's access permissions disallows an operation.
627
853
"""
628
854
629
855
@staticmethod
630
def _is_dbus_property(obj):
631
return getattr(obj, "_dbus_is_property", False)
856
def _is_dbus_thing(thing):
857
"""Returns a function testing if an attribute is a D-Bus thing
858
859
If called like _is_dbus_thing("method") it returns a function
860
suitable for use as predicate to inspect.getmembers().
861
"""
862
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
863
False)
632
864
633
def _get_all_dbus_properties(self):
865
def _get_all_dbus_things(self, thing):
634
866
"""Returns a generator of (name, attribute) pairs
635
867
"""
636
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
868
return ((getattr(athing.__get__(self), "_dbus_name",
869
name),
870
athing.__get__(self))
637
871
for cls in self.__class__.__mro__
638
for name, prop in
639
inspect.getmembers(cls, self._is_dbus_property))
872
for name, athing in
873
inspect.getmembers(cls,
874
self._is_dbus_thing(thing)))
640
875
641
876
def _get_dbus_property(self, interface_name, property_name):
642
877
"""Returns a bound method if one exists which is a D-Bus
644
879
"""
645
880
for cls in self.__class__.__mro__:
646
881
for name, value in (inspect.getmembers
647
(cls, self._is_dbus_property)):
882
(cls,
883
self._is_dbus_thing("property"))):
648
884
if (value._dbus_name == property_name
649
885
and value._dbus_interface == interface_name):
650
886
return value.__get__(self)
678
914
# The byte_arrays option is not supported yet on
679
915
# signatures other than "ay".
680
916
if prop._dbus_signature != "ay":
681
raise ValueError
682
value = dbus.ByteArray(''.join(unichr(byte)
683
for byte in value))
917
raise ValueError("Byte arrays not supported for non-"
918
"'ay' signature {!r}"
919
.format(prop._dbus_signature))
920
value = dbus.ByteArray(b''.join(chr(byte)
921
for byte in value))
684
922
prop(value)
685
923
686
924
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
691
929
692
930
Note: Will not include properties with access="write".
693
931
"""
694
all = {}
695
for name, prop in self._get_all_dbus_properties():
932
properties = {}
933
for name, prop in self._get_all_dbus_things("property"):
696
934
if (interface_name
697
935
and interface_name != prop._dbus_interface):
698
936
# Interface non-empty but did not match
702
940
continue
703
941
value = prop()
704
942
if not hasattr(value, "variant_level"):
705
all[name] = value
943
properties[name] = value
706
944
continue
707
all[name] = type(value)(value, variant_level=
708
value.variant_level+1)
709
return dbus.Dictionary(all, signature="sv")
945
properties[name] = type(value)(value, variant_level=
946
value.variant_level+1)
947
return dbus.Dictionary(properties, signature="sv")
948
949
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
950
def PropertiesChanged(self, interface_name, changed_properties,
951
invalidated_properties):
952
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
953
standard.
954
"""
955
pass
710
956
711
957
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
712
958
out_signature="s",
713
959
path_keyword='object_path',
714
960
connection_keyword='connection')
715
961
def Introspect(self, object_path, connection):
716
"""Standard D-Bus method, overloaded to insert property tags.
962
"""Overloading of standard D-Bus method.
963
964
Inserts property tags and interface annotation tags.
717
965
"""
718
966
xmlstring = dbus.service.Object.Introspect(self, object_path,
719
967
connection)
726
974
e.setAttribute("access", prop._dbus_access)
727
975
return e
728
976
for if_tag in document.getElementsByTagName("interface"):
977
# Add property tags
729
978
for tag in (make_tag(document, name, prop)
730
979
for name, prop
731
in self._get_all_dbus_properties()
980
in self._get_all_dbus_things("property")
732
981
if prop._dbus_interface
733
982
== if_tag.getAttribute("name")):
734
983
if_tag.appendChild(tag)
984
# Add annotation tags
985
for typ in ("method", "signal", "property"):
986
for tag in if_tag.getElementsByTagName(typ):
987
annots = dict()
988
for name, prop in (self.
989
_get_all_dbus_things(typ)):
990
if (name == tag.getAttribute("name")
991
and prop._dbus_interface
992
== if_tag.getAttribute("name")):
993
annots.update(getattr
994
(prop,
995
"_dbus_annotations",
996
{}))
997
for name, value in annots.items():
998
ann_tag = document.createElement(
999
"annotation")
1000
ann_tag.setAttribute("name", name)
1001
ann_tag.setAttribute("value", value)
1002
tag.appendChild(ann_tag)
1003
# Add interface annotation tags
1004
for annotation, value in dict(
1005
itertools.chain.from_iterable(
1006
annotations().items()
1007
for name, annotations in
1008
self._get_all_dbus_things("interface")
1009
if name == if_tag.getAttribute("name")
1010
)).items():
1011
ann_tag = document.createElement("annotation")
1012
ann_tag.setAttribute("name", annotation)
1013
ann_tag.setAttribute("value", value)
1014
if_tag.appendChild(ann_tag)
735
1015
# Add the names to the return values for the
736
1016
# "org.freedesktop.DBus.Properties" methods
737
1017
if (if_tag.getAttribute("name")
752
1032
except (AttributeError, xml.dom.DOMException,
753
1033
xml.parsers.expat.ExpatError) as error:
754
1034
logger.error("Failed to override Introspection method",
755
error)
1035
exc_info=error)
756
1036
return xmlstring
757
1037
758
1038
759
def datetime_to_dbus (dt, variant_level=0):
1039
def datetime_to_dbus(dt, variant_level=0):
760
1040
"""Convert a UTC datetime.datetime() to a D-Bus type."""
761
1041
if dt is None:
762
1042
return dbus.String("", variant_level = variant_level)
763
1043
return dbus.String(dt.isoformat(),
764
1044
variant_level=variant_level)
765
1045
766
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
767
.__metaclass__):
768
"""Applied to an empty subclass of a D-Bus object, this metaclass
769
will add additional D-Bus attributes matching a certain pattern.
1046
1047
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1048
"""A class decorator; applied to a subclass of
1049
dbus.service.Object, it will add alternate D-Bus attributes with
1050
interface names according to the "alt_interface_names" mapping.
1051
Usage:
1052
1053
@alternate_dbus_interfaces({"org.example.Interface":
1054
"net.example.AlternateInterface"})
1055
class SampleDBusObject(dbus.service.Object):
1056
@dbus.service.method("org.example.Interface")
1057
def SampleDBusMethod():
1058
pass
1059
1060
The above "SampleDBusMethod" on "SampleDBusObject" will be
1061
reachable via two interfaces: "org.example.Interface" and
1062
"net.example.AlternateInterface", the latter of which will have
1063
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1064
"true", unless "deprecate" is passed with a False value.
1065
1066
This works for methods and signals, and also for D-Bus properties
1067
(from DBusObjectWithProperties) and interfaces (from the
1068
dbus_interface_annotations decorator).
770
1069
"""
771
def __new__(mcs, name, bases, attr):
772
# Go through all the base classes which could have D-Bus
773
# methods, signals, or properties in them
774
for base in (b for b in bases
775
if issubclass(b, dbus.service.Object)):
776
# Go though all attributes of the base class
777
for attrname, attribute in inspect.getmembers(base):
1070
def wrapper(cls):
1071
for orig_interface_name, alt_interface_name in (
1072
alt_interface_names.items()):
1073
attr = {}
1074
interface_names = set()
1075
# Go though all attributes of the class
1076
for attrname, attribute in inspect.getmembers(cls):
778
1077
# Ignore non-D-Bus attributes, and D-Bus attributes
779
1078
# with the wrong interface name
780
1079
if (not hasattr(attribute, "_dbus_interface")
781
1080
or not attribute._dbus_interface
782
.startswith("se.recompile.Mandos")):
1081
.startswith(orig_interface_name)):
783
1082
continue
784
1083
# Create an alternate D-Bus interface name based on
785
1084
# the current name
786
1085
alt_interface = (attribute._dbus_interface
787
.replace("se.recompile.Mandos",
788
"se.bsnet.fukt.Mandos"))
1086
.replace(orig_interface_name,
1087
alt_interface_name))
1088
interface_names.add(alt_interface)
789
1089
# Is this a D-Bus signal?
790
1090
if getattr(attribute, "_dbus_is_signal", False):
791
# Extract the original non-method function by
792
# black magic
1091
# Extract the original non-method undecorated
1092
# function by black magic
793
1093
nonmethod_func = (dict(
794
1094
zip(attribute.func_code.co_freevars,
795
1095
attribute.__closure__))["func"]
806
1106
nonmethod_func.func_name,
807
1107
nonmethod_func.func_defaults,
808
1108
nonmethod_func.func_closure)))
1109
# Copy annotations, if any
1110
try:
1111
new_function._dbus_annotations = (
1112
dict(attribute._dbus_annotations))
1113
except AttributeError:
1114
pass
809
1115
# Define a creator of a function to call both the
810
# old and new functions, so both the old and new
811
# signals gets sent when the function is called
1116
# original and alternate functions, so both the
1117
# original and alternate signals gets sent when
1118
# the function is called
812
1119
def fixscope(func1, func2):
813
1120
"""This function is a scope container to pass
814
1121
func1 and func2 to the "call_both" function
821
1128
return call_both
822
1129
# Create the "call_both" function and add it to
823
1130
# the class
824
attr[attrname] = fixscope(attribute,
825
new_function)
1131
attr[attrname] = fixscope(attribute, new_function)
826
1132
# Is this a D-Bus method?
827
1133
elif getattr(attribute, "_dbus_is_method", False):
828
1134
# Create a new, but exactly alike, function
839
1145
attribute.func_name,
840
1146
attribute.func_defaults,
841
1147
attribute.func_closure)))
1148
# Copy annotations, if any
1149
try:
1150
attr[attrname]._dbus_annotations = (
1151
dict(attribute._dbus_annotations))
1152
except AttributeError:
1153
pass
842
1154
# Is this a D-Bus property?
843
1155
elif getattr(attribute, "_dbus_is_property", False):
844
1156
# Create a new, but exactly alike, function
858
1170
attribute.func_name,
859
1171
attribute.func_defaults,
860
1172
attribute.func_closure)))
861
return type.__new__(mcs, name, bases, attr)
862
1173
# Copy annotations, if any
1174
try:
1175
attr[attrname]._dbus_annotations = (
1176
dict(attribute._dbus_annotations))
1177
except AttributeError:
1178
pass
1179
# Is this a D-Bus interface?
1180
elif getattr(attribute, "_dbus_is_interface", False):
1181
# Create a new, but exactly alike, function
1182
# object. Decorate it to be a new D-Bus interface
1183
# with the alternate D-Bus interface name. Add it
1184
# to the class.
1185
attr[attrname] = (dbus_interface_annotations
1186
(alt_interface)
1187
(types.FunctionType
1188
(attribute.func_code,
1189
attribute.func_globals,
1190
attribute.func_name,
1191
attribute.func_defaults,
1192
attribute.func_closure)))
1193
if deprecate:
1194
# Deprecate all alternate interfaces
1195
iname="_AlternateDBusNames_interface_annotation{}"
1196
for interface_name in interface_names:
1197
@dbus_interface_annotations(interface_name)
1198
def func(self):
1199
return { "org.freedesktop.DBus.Deprecated":
1200
"true" }
1201
# Find an unused name
1202
for aname in (iname.format(i)
1203
for i in itertools.count()):
1204
if aname not in attr:
1205
attr[aname] = func
1206
break
1207
if interface_names:
1208
# Replace the class with a new subclass of it with
1209
# methods, signals, etc. as created above.
1210
cls = type(b"{}Alternate".format(cls.__name__),
1211
(cls,), attr)
1212
return cls
1213
return wrapper
1214
1215
1216
@alternate_dbus_interfaces({"se.recompile.Mandos":
1217
"se.bsnet.fukt.Mandos"})
863
1218
class ClientDBus(Client, DBusObjectWithProperties):
864
1219
"""A Client class using D-Bus
865
1220
871
1226
runtime_expansions = (Client.runtime_expansions
872
1227
+ ("dbus_object_path",))
873
1228
1229
_interface = "se.recompile.Mandos.Client"
1230
874
1231
# dbus.service.Object doesn't use super(), so we can't either.
875
1232
876
1233
def __init__(self, bus = None, *args, **kwargs):
877
self._approvals_pending = 0
878
1234
self.bus = bus
879
1235
Client.__init__(self, *args, **kwargs)
880
1236
# Only now, when this client is initialized, can it show up on
881
1237
# the D-Bus
882
client_object_name = unicode(self.name).translate(
1238
client_object_name = str(self.name).translate(
883
1239
{ord("."): ord("_"),
884
1240
ord("-"): ord("_")})
885
1241
self.dbus_object_path = (dbus.ObjectPath
886
1242
("/clients/" + client_object_name))
887
1243
DBusObjectWithProperties.__init__(self, self.bus,
888
1244
self.dbus_object_path)
889
1245
890
1246
def notifychangeproperty(transform_func,
891
1247
dbus_name, type_func=lambda x: x,
892
variant_level=1):
1248
variant_level=1, invalidate_only=False,
1249
_interface=_interface):
893
1250
""" Modify a variable so that it's a property which announces
894
1251
its changes to DBus.
895
1252
896
1253
transform_fun: Function that takes a value and a variant_level
897
1254
and transforms it to a D-Bus type.
898
1255
dbus_name: D-Bus name of the variable
900
1257
to the D-Bus. Default: no transform
901
1258
variant_level: D-Bus variant level. Default: 1
902
1259
"""
903
attrname = "_{0}".format(dbus_name)
1260
attrname = "_{}".format(dbus_name)
904
1261
def setter(self, value):
905
1262
if hasattr(self, "dbus_object_path"):
906
1263
if (not hasattr(self, attrname) or
907
1264
type_func(getattr(self, attrname, None))
908
1265
!= type_func(value)):
909
dbus_value = transform_func(type_func(value),
910
variant_level
911
=variant_level)
912
self.PropertyChanged(dbus.String(dbus_name),
913
dbus_value)
1266
if invalidate_only:
1267
self.PropertiesChanged(_interface,
1268
dbus.Dictionary(),
1269
dbus.Array
1270
((dbus_name,)))
1271
else:
1272
dbus_value = transform_func(type_func(value),
1273
variant_level
1274
=variant_level)
1275
self.PropertyChanged(dbus.String(dbus_name),
1276
dbus_value)
1277
self.PropertiesChanged(_interface,
1278
dbus.Dictionary({
1279
dbus.String(dbus_name):
1280
dbus_value }), dbus.Array())
914
1281
setattr(self, attrname, value)
915
1282
916
1283
return property(lambda self: getattr(self, attrname), setter)
917
1284
918
919
1285
expires = notifychangeproperty(datetime_to_dbus, "Expires")
920
1286
approvals_pending = notifychangeproperty(dbus.Boolean,
921
1287
"ApprovalPending",
928
1294
checker is not None)
929
1295
last_checked_ok = notifychangeproperty(datetime_to_dbus,
930
1296
"LastCheckedOK")
1297
last_checker_status = notifychangeproperty(dbus.Int16,
1298
"LastCheckerStatus")
931
1299
last_approval_request = notifychangeproperty(
932
1300
datetime_to_dbus, "LastApprovalRequest")
933
1301
approved_by_default = notifychangeproperty(dbus.Boolean,
934
1302
"ApprovedByDefault")
935
approval_delay = notifychangeproperty(dbus.UInt16,
1303
approval_delay = notifychangeproperty(dbus.UInt64,
936
1304
"ApprovalDelay",
937
1305
type_func =
938
_timedelta_to_milliseconds)
1306
lambda td: td.total_seconds()
1307
* 1000)
939
1308
approval_duration = notifychangeproperty(
940
dbus.UInt16, "ApprovalDuration",
941
type_func = _timedelta_to_milliseconds)
1309
dbus.UInt64, "ApprovalDuration",
1310
type_func = lambda td: td.total_seconds() * 1000)
942
1311
host = notifychangeproperty(dbus.String, "Host")
943
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
944
type_func =
945
_timedelta_to_milliseconds)
1312
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1313
type_func = lambda td:
1314
td.total_seconds() * 1000)
946
1315
extended_timeout = notifychangeproperty(
947
dbus.UInt16, "ExtendedTimeout",
948
type_func = _timedelta_to_milliseconds)
949
interval = notifychangeproperty(dbus.UInt16,
1316
dbus.UInt64, "ExtendedTimeout",
1317
type_func = lambda td: td.total_seconds() * 1000)
1318
interval = notifychangeproperty(dbus.UInt64,
950
1319
"Interval",
951
1320
type_func =
952
_timedelta_to_milliseconds)
1321
lambda td: td.total_seconds()
1322
* 1000)
953
1323
checker_command = notifychangeproperty(dbus.String, "Checker")
1324
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1325
invalidate_only=True)
954
1326
955
1327
del notifychangeproperty
956
1328
983
1355
*args, **kwargs)
984
1356
985
1357
def start_checker(self, *args, **kwargs):
986
old_checker = self.checker
987
if self.checker is not None:
988
old_checker_pid = self.checker.pid
989
else:
990
old_checker_pid = None
1358
old_checker_pid = getattr(self.checker, "pid", None)
991
1359
r = Client.start_checker(self, *args, **kwargs)
992
1360
# Only if new checker process was started
993
1361
if (self.checker is not None
997
1365
return r
998
1366
999
1367
def _reset_approved(self):
1000
self._approved = None
1368
self.approved = None
1001
1369
return False
1002
1370
1003
1371
def approve(self, value=True):
1372
self.approved = value
1373
gobject.timeout_add(int(self.approval_duration.total_seconds()
1374
* 1000), self._reset_approved)
1004
1375
self.send_changedstate()
1005
self._approved = value
1006
gobject.timeout_add(_timedelta_to_milliseconds
1007
(self.approval_duration),
1008
self._reset_approved)
1009
1010
1376
1011
1377
## D-Bus methods, signals & properties
1012
_interface = "se.recompile.Mandos.Client"
1378
1379
## Interfaces
1013
1380
1014
1381
## Signals
1015
1382
1026
1393
pass
1027
1394
1028
1395
# PropertyChanged - signal
1396
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1029
1397
@dbus.service.signal(_interface, signature="sv")
1030
1398
def PropertyChanged(self, property, value):
1031
1399
"D-Bus signal"
1107
1475
access="readwrite")
1108
1476
def ApprovalDelay_dbus_property(self, value=None):
1109
1477
if value is None: # get
1110
return dbus.UInt64(self.approval_delay_milliseconds())
1478
return dbus.UInt64(self.approval_delay.total_seconds()
1479
* 1000)
1111
1480
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1112
1481
1113
1482
# ApprovalDuration - property
1115
1484
access="readwrite")
1116
1485
def ApprovalDuration_dbus_property(self, value=None):
1117
1486
if value is None: # get
1118
return dbus.UInt64(_timedelta_to_milliseconds(
1119
self.approval_duration))
1487
return dbus.UInt64(self.approval_duration.total_seconds()
1488
* 1000)
1120
1489
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1121
1490
1122
1491
# Name - property
1135
1504
def Host_dbus_property(self, value=None):
1136
1505
if value is None: # get
1137
1506
return dbus.String(self.host)
1138
self.host = value
1507
self.host = str(value)
1139
1508
1140
1509
# Created - property
1141
1510
@dbus_service_property(_interface, signature="s", access="read")
1142
1511
def Created_dbus_property(self):
1143
return dbus.String(datetime_to_dbus(self.created))
1512
return datetime_to_dbus(self.created)
1144
1513
1145
1514
# LastEnabled - property
1146
1515
@dbus_service_property(_interface, signature="s", access="read")
1167
1536
return
1168
1537
return datetime_to_dbus(self.last_checked_ok)
1169
1538
1539
# LastCheckerStatus - property
1540
@dbus_service_property(_interface, signature="n",
1541
access="read")
1542
def LastCheckerStatus_dbus_property(self):
1543
return dbus.Int16(self.last_checker_status)
1544
1170
1545
# Expires - property
1171
1546
@dbus_service_property(_interface, signature="s", access="read")
1172
1547
def Expires_dbus_property(self):
1182
1557
access="readwrite")
1183
1558
def Timeout_dbus_property(self, value=None):
1184
1559
if value is None: # get
1185
return dbus.UInt64(self.timeout_milliseconds())
1560
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1561
old_timeout = self.timeout
1186
1562
self.timeout = datetime.timedelta(0, 0, 0, value)
1187
if getattr(self, "disable_initiator_tag", None) is None:
1188
return
1189
# Reschedule timeout
1190
gobject.source_remove(self.disable_initiator_tag)
1191
self.disable_initiator_tag = None
1192
self.expires = None
1193
time_to_die = _timedelta_to_milliseconds((self
1194
.last_checked_ok
1195
+ self.timeout)
1196
- datetime.datetime
1197
.utcnow())
1198
if time_to_die <= 0:
1199
# The timeout has passed
1200
self.disable()
1201
else:
1202
self.expires = (datetime.datetime.utcnow()
1203
+ datetime.timedelta(milliseconds =
1204
time_to_die))
1205
self.disable_initiator_tag = (gobject.timeout_add
1206
(time_to_die, self.disable))
1563
# Reschedule disabling
1564
if self.enabled:
1565
now = datetime.datetime.utcnow()
1566
self.expires += self.timeout - old_timeout
1567
if self.expires <= now:
1568
# The timeout has passed
1569
self.disable()
1570
else:
1571
if (getattr(self, "disable_initiator_tag", None)
1572
is None):
1573
return
1574
gobject.source_remove(self.disable_initiator_tag)
1575
self.disable_initiator_tag = (
1576
gobject.timeout_add(
1577
int((self.expires - now).total_seconds()
1578
* 1000), self.disable))
1207
1579
1208
1580
# ExtendedTimeout - property
1209
1581
@dbus_service_property(_interface, signature="t",
1210
1582
access="readwrite")
1211
1583
def ExtendedTimeout_dbus_property(self, value=None):
1212
1584
if value is None: # get
1213
return dbus.UInt64(self.extended_timeout_milliseconds())
1585
return dbus.UInt64(self.extended_timeout.total_seconds()
1586
* 1000)
1214
1587
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1215
1588
1216
1589
# Interval - property
1218
1591
access="readwrite")
1219
1592
def Interval_dbus_property(self, value=None):
1220
1593
if value is None: # get
1221
return dbus.UInt64(self.interval_milliseconds())
1594
return dbus.UInt64(self.interval.total_seconds() * 1000)
1222
1595
self.interval = datetime.timedelta(0, 0, 0, value)
1223
1596
if getattr(self, "checker_initiator_tag", None) is None:
1224
1597
return
1225
# Reschedule checker run
1226
gobject.source_remove(self.checker_initiator_tag)
1227
self.checker_initiator_tag = (gobject.timeout_add
1228
(value, self.start_checker))
1229
self.start_checker() # Start one now, too
1598
if self.enabled:
1599
# Reschedule checker run
1600
gobject.source_remove(self.checker_initiator_tag)
1601
self.checker_initiator_tag = (gobject.timeout_add
1602
(value, self.start_checker))
1603
self.start_checker() # Start one now, too
1230
1604
1231
1605
# Checker - property
1232
1606
@dbus_service_property(_interface, signature="s",
1234
1608
def Checker_dbus_property(self, value=None):
1235
1609
if value is None: # get
1236
1610
return dbus.String(self.checker_command)
1237
self.checker_command = value
1611
self.checker_command = str(value)
1238
1612
1239
1613
# CheckerRunning - property
1240
1614
@dbus_service_property(_interface, signature="b",
1256
1630
@dbus_service_property(_interface, signature="ay",
1257
1631
access="write", byte_arrays=True)
1258
1632
def Secret_dbus_property(self, value):
1259
self.secret = str(value)
1633
self.secret = bytes(value)
1260
1634
1261
1635
del _interface
1262
1636
1269
1643
raise KeyError()
1270
1644
1271
1645
def __getattribute__(self, name):
1272
if(name == '_pipe'):
1646
if name == '_pipe':
1273
1647
return super(ProxyClient, self).__getattribute__(name)
1274
1648
self._pipe.send(('getattr', name))
1275
1649
data = self._pipe.recv()
1282
1656
return func
1283
1657
1284
1658
def __setattr__(self, name, value):
1285
if(name == '_pipe'):
1659
if name == '_pipe':
1286
1660
return super(ProxyClient, self).__setattr__(name, value)
1287
1661
self._pipe.send(('setattr', name, value))
1288
1662
1289
class ClientDBusTransitional(ClientDBus):
1290
__metaclass__ = AlternateDBusNamesMetaclass
1291
1663
1292
1664
class ClientHandler(socketserver.BaseRequestHandler, object):
1293
1665
"""A class to handle client connections.
1298
1670
def handle(self):
1299
1671
with contextlib.closing(self.server.child_pipe) as child_pipe:
1300
1672
logger.info("TCP connection from: %s",
1301
unicode(self.client_address))
1673
str(self.client_address))
1302
1674
logger.debug("Pipe FD: %d",
1303
1675
self.server.child_pipe.fileno())
1304
1676
1330
1702
logger.debug("Protocol version: %r", line)
1331
1703
try:
1332
1704
if int(line.strip().split()[0]) > 1:
1333
raise RuntimeError
1705
raise RuntimeError(line)
1334
1706
except (ValueError, IndexError, RuntimeError) as error:
1335
1707
logger.error("Unknown protocol version: %s", error)
1336
1708
return
1376
1748
client.Rejected("Disabled")
1377
1749
return
1378
1750
1379
if client._approved or not client.approval_delay:
1751
if client.approved or not client.approval_delay:
1380
1752
#We are approved or approval is disabled
1381
1753
break
1382
elif client._approved is None:
1754
elif client.approved is None:
1383
1755
logger.info("Client %s needs approval",
1384
1756
client.name)
1385
1757
if self.server.use_dbus:
1386
1758
# Emit D-Bus signal
1387
1759
client.NeedApproval(
1388
client.approval_delay_milliseconds(),
1389
client.approved_by_default)
1760
client.approval_delay.total_seconds()
1761
* 1000, client.approved_by_default)
1390
1762
else:
1391
1763
logger.warning("Client %s was not approved",
1392
1764
client.name)
1398
1770
#wait until timeout or approved
1399
1771
time = datetime.datetime.now()
1400
1772
client.changedstate.acquire()
1401
(client.changedstate.wait
1402
(float(client._timedelta_to_milliseconds(delay)
1403
/ 1000)))
1773
client.changedstate.wait(delay.total_seconds())
1404
1774
client.changedstate.release()
1405
1775
time2 = datetime.datetime.now()
1406
1776
if (time2 - time) >= delay:
1422
1792
try:
1423
1793
sent = session.send(client.secret[sent_size:])
1424
1794
except gnutls.errors.GNUTLSError as error:
1425
logger.warning("gnutls send failed")
1795
logger.warning("gnutls send failed",
1796
exc_info=error)
1426
1797
return
1427
1798
logger.debug("Sent: %d, remaining: %d",
1428
1799
sent, len(client.secret)
1431
1802
1432
1803
logger.info("Sending secret to %s", client.name)
1433
1804
# bump the timeout using extended_timeout
1434
client.checked_ok(client.extended_timeout)
1805
client.bump_timeout(client.extended_timeout)
1435
1806
if self.server.use_dbus:
1436
1807
# Emit D-Bus signal
1437
1808
client.GotSecret()
1442
1813
try:
1443
1814
session.bye()
1444
1815
except gnutls.errors.GNUTLSError as error:
1445
logger.warning("GnuTLS bye failed")
1816
logger.warning("GnuTLS bye failed",
1817
exc_info=error)
1446
1818
1447
1819
@staticmethod
1448
1820
def peer_certificate(session):
1504
1876
# Convert the buffer to a Python bytestring
1505
1877
fpr = ctypes.string_at(buf, buf_len.value)
1506
1878
# Convert the bytestring to hexadecimal notation
1507
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1879
hex_fpr = binascii.hexlify(fpr).upper()
1508
1880
return hex_fpr
1509
1881
1510
1882
1513
1885
def sub_process_main(self, request, address):
1514
1886
try:
1515
1887
self.finish_request(request, address)
1516
except:
1888
except Exception:
1517
1889
self.handle_error(request, address)
1518
1890
self.close_request(request)
1519
1891
1520
1892
def process_request(self, request, address):
1521
1893
"""Start a new process to process the request."""
1522
1894
proc = multiprocessing.Process(target = self.sub_process_main,
1523
args = (request,
1524
address))
1895
args = (request, address))
1525
1896
proc.start()
1526
1897
return proc
1527
1898
1542
1913
1543
1914
def add_pipe(self, parent_pipe, proc):
1544
1915
"""Dummy function; override as necessary"""
1545
raise NotImplementedError
1916
raise NotImplementedError()
1546
1917
1547
1918
1548
1919
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1555
1926
use_ipv6: Boolean; to use IPv6 or not
1556
1927
"""
1557
1928
def __init__(self, server_address, RequestHandlerClass,
1558
interface=None, use_ipv6=True):
1929
interface=None, use_ipv6=True, socketfd=None):
1930
"""If socketfd is set, use that file descriptor instead of
1931
creating a new one with socket.socket().
1932
"""
1559
1933
self.interface = interface
1560
1934
if use_ipv6:
1561
1935
self.address_family = socket.AF_INET6
1936
if socketfd is not None:
1937
# Save the file descriptor
1938
self.socketfd = socketfd
1939
# Save the original socket.socket() function
1940
self.socket_socket = socket.socket
1941
# To implement --socket, we monkey patch socket.socket.
1942
#
1943
# (When socketserver.TCPServer is a new-style class, we
1944
# could make self.socket into a property instead of monkey
1945
# patching socket.socket.)
1946
#
1947
# Create a one-time-only replacement for socket.socket()
1948
@functools.wraps(socket.socket)
1949
def socket_wrapper(*args, **kwargs):
1950
# Restore original function so subsequent calls are
1951
# not affected.
1952
socket.socket = self.socket_socket
1953
del self.socket_socket
1954
# This time only, return a new socket object from the
1955
# saved file descriptor.
1956
return socket.fromfd(self.socketfd, *args, **kwargs)
1957
# Replace socket.socket() function with wrapper
1958
socket.socket = socket_wrapper
1959
# The socketserver.TCPServer.__init__ will call
1960
# socket.socket(), which might be our replacement,
1961
# socket_wrapper(), if socketfd was set.
1562
1962
socketserver.TCPServer.__init__(self, server_address,
1563
1963
RequestHandlerClass)
1964
1564
1965
def server_bind(self):
1565
1966
"""This overrides the normal server_bind() function
1566
1967
to bind to an interface if one was specified, and also NOT to
1574
1975
try:
1575
1976
self.socket.setsockopt(socket.SOL_SOCKET,
1576
1977
SO_BINDTODEVICE,
1577
str(self.interface
1578
+ '\0'))
1978
(self.interface + "\0")
1979
.encode("utf-8"))
1579
1980
except socket.error as error:
1580
if error[0] == errno.EPERM:
1581
logger.error("No permission to"
1582
" bind to interface %s",
1583
self.interface)
1584
elif error[0] == errno.ENOPROTOOPT:
1981
if error.errno == errno.EPERM:
1982
logger.error("No permission to bind to"
1983
" interface %s", self.interface)
1984
elif error.errno == errno.ENOPROTOOPT:
1585
1985
logger.error("SO_BINDTODEVICE not available;"
1586
1986
" cannot bind to interface %s",
1587
1987
self.interface)
1988
elif error.errno == errno.ENODEV:
1989
logger.error("Interface %s does not exist,"
1990
" cannot bind", self.interface)
1588
1991
else:
1589
1992
raise
1590
1993
# Only bind(2) the socket if we really need to.
1593
1996
if self.address_family == socket.AF_INET6:
1594
1997
any_address = "::" # in6addr_any
1595
1998
else:
1596
any_address = socket.INADDR_ANY
1999
any_address = "0.0.0.0" # INADDR_ANY
1597
2000
self.server_address = (any_address,
1598
2001
self.server_address[1])
1599
2002
elif not self.server_address[1]:
1620
2023
"""
1621
2024
def __init__(self, server_address, RequestHandlerClass,
1622
2025
interface=None, use_ipv6=True, clients=None,
1623
gnutls_priority=None, use_dbus=True):
2026
gnutls_priority=None, use_dbus=True, socketfd=None):
1624
2027
self.enabled = False
1625
2028
self.clients = clients
1626
2029
if self.clients is None:
1627
self.clients = set()
2030
self.clients = {}
1628
2031
self.use_dbus = use_dbus
1629
2032
self.gnutls_priority = gnutls_priority
1630
2033
IPv6_TCPServer.__init__(self, server_address,
1631
2034
RequestHandlerClass,
1632
2035
interface = interface,
1633
use_ipv6 = use_ipv6)
2036
use_ipv6 = use_ipv6,
2037
socketfd = socketfd)
1634
2038
def server_activate(self):
1635
2039
if self.enabled:
1636
2040
return socketserver.TCPServer.server_activate(self)
1649
2053
1650
2054
def handle_ipc(self, source, condition, parent_pipe=None,
1651
2055
proc = None, client_object=None):
1652
condition_names = {
1653
gobject.IO_IN: "IN", # There is data to read.
1654
gobject.IO_OUT: "OUT", # Data can be written (without
1655
# blocking).
1656
gobject.IO_PRI: "PRI", # There is urgent data to read.
1657
gobject.IO_ERR: "ERR", # Error condition.
1658
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1659
# broken, usually for pipes and
1660
# sockets).
1661
}
1662
conditions_string = ' | '.join(name
1663
for cond, name in
1664
condition_names.iteritems()
1665
if cond & condition)
1666
2056
# error, or the other end of multiprocessing.Pipe has closed
1667
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2057
if condition & (gobject.IO_ERR | gobject.IO_HUP):
1668
2058
# Wait for other process to exit
1669
2059
proc.join()
1670
2060
return False
1677
2067
fpr = request[1]
1678
2068
address = request[2]
1679
2069
1680
for c in self.clients:
2070
for c in self.clients.itervalues():
1681
2071
if c.fingerprint == fpr:
1682
2072
client = c
1683
2073
break
1728
2118
return True
1729
2119
1730
2120
2121
def rfc3339_duration_to_delta(duration):
2122
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2123
2124
>>> rfc3339_duration_to_delta("P7D")
2125
datetime.timedelta(7)
2126
>>> rfc3339_duration_to_delta("PT60S")
2127
datetime.timedelta(0, 60)
2128
>>> rfc3339_duration_to_delta("PT60M")
2129
datetime.timedelta(0, 3600)
2130
>>> rfc3339_duration_to_delta("PT24H")
2131
datetime.timedelta(1)
2132
>>> rfc3339_duration_to_delta("P1W")
2133
datetime.timedelta(7)
2134
>>> rfc3339_duration_to_delta("PT5M30S")
2135
datetime.timedelta(0, 330)
2136
>>> rfc3339_duration_to_delta("P1DT3M20S")
2137
datetime.timedelta(1, 200)
2138
"""
2139
2140
# Parsing an RFC 3339 duration with regular expressions is not
2141
# possible - there would have to be multiple places for the same
2142
# values, like seconds. The current code, while more esoteric, is
2143
# cleaner without depending on a parsing library. If Python had a
2144
# built-in library for parsing we would use it, but we'd like to
2145
# avoid excessive use of external libraries.
2146
2147
# New type for defining tokens, syntax, and semantics all-in-one
2148
Token = collections.namedtuple("Token",
2149
("regexp", # To match token; if
2150
# "value" is not None,
2151
# must have a "group"
2152
# containing digits
2153
"value", # datetime.timedelta or
2154
# None
2155
"followers")) # Tokens valid after
2156
# this token
2157
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2158
# the "duration" ABNF definition in RFC 3339, Appendix A.
2159
token_end = Token(re.compile(r"$"), None, frozenset())
2160
token_second = Token(re.compile(r"(\d+)S"),
2161
datetime.timedelta(seconds=1),
2162
frozenset((token_end,)))
2163
token_minute = Token(re.compile(r"(\d+)M"),
2164
datetime.timedelta(minutes=1),
2165
frozenset((token_second, token_end)))
2166
token_hour = Token(re.compile(r"(\d+)H"),
2167
datetime.timedelta(hours=1),
2168
frozenset((token_minute, token_end)))
2169
token_time = Token(re.compile(r"T"),
2170
None,
2171
frozenset((token_hour, token_minute,
2172
token_second)))
2173
token_day = Token(re.compile(r"(\d+)D"),
2174
datetime.timedelta(days=1),
2175
frozenset((token_time, token_end)))
2176
token_month = Token(re.compile(r"(\d+)M"),
2177
datetime.timedelta(weeks=4),
2178
frozenset((token_day, token_end)))
2179
token_year = Token(re.compile(r"(\d+)Y"),
2180
datetime.timedelta(weeks=52),
2181
frozenset((token_month, token_end)))
2182
token_week = Token(re.compile(r"(\d+)W"),
2183
datetime.timedelta(weeks=1),
2184
frozenset((token_end,)))
2185
token_duration = Token(re.compile(r"P"), None,
2186
frozenset((token_year, token_month,
2187
token_day, token_time,
2188
token_week)))
2189
# Define starting values
2190
value = datetime.timedelta() # Value so far
2191
found_token = None
2192
followers = frozenset((token_duration,)) # Following valid tokens
2193
s = duration # String left to parse
2194
# Loop until end token is found
2195
while found_token is not token_end:
2196
# Search for any currently valid tokens
2197
for token in followers:
2198
match = token.regexp.match(s)
2199
if match is not None:
2200
# Token found
2201
if token.value is not None:
2202
# Value found, parse digits
2203
factor = int(match.group(1), 10)
2204
# Add to value so far
2205
value += factor * token.value
2206
# Strip token from string
2207
s = token.regexp.sub("", s, 1)
2208
# Go to found token
2209
found_token = token
2210
# Set valid next tokens
2211
followers = found_token.followers
2212
break
2213
else:
2214
# No currently valid tokens were found
2215
raise ValueError("Invalid RFC 3339 duration")
2216
# End token found
2217
return value
2218
2219
1731
2220
def string_to_delta(interval):
1732
2221
"""Parse a string and return a datetime.timedelta
1733
2222
1744
2233
>>> string_to_delta('5m 30s')
1745
2234
datetime.timedelta(0, 330)
1746
2235
"""
2236
2237
try:
2238
return rfc3339_duration_to_delta(interval)
2239
except ValueError:
2240
pass
2241
1747
2242
timevalue = datetime.timedelta(0)
1748
2243
for s in interval.split():
1749
2244
try:
1750
suffix = unicode(s[-1])
2245
suffix = s[-1]
1751
2246
value = int(s[:-1])
1752
2247
if suffix == "d":
1753
2248
delta = datetime.timedelta(value)
1760
2255
elif suffix == "w":
1761
2256
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1762
2257
else:
1763
raise ValueError("Unknown suffix %r" % suffix)
1764
except (ValueError, IndexError) as e:
2258
raise ValueError("Unknown suffix {!r}"
2259
.format(suffix))
2260
except IndexError as e:
1765
2261
raise ValueError(*(e.args))
1766
2262
timevalue += delta
1767
2263
return timevalue
1768
2264
1769
2265
1770
def if_nametoindex(interface):
1771
"""Call the C function if_nametoindex(), or equivalent
1772
1773
Note: This function cannot accept a unicode string."""
1774
global if_nametoindex
1775
try:
1776
if_nametoindex = (ctypes.cdll.LoadLibrary
1777
(ctypes.util.find_library("c"))
1778
.if_nametoindex)
1779
except (OSError, AttributeError):
1780
logger.warning("Doing if_nametoindex the hard way")
1781
def if_nametoindex(interface):
1782
"Get an interface index the hard way, i.e. using fcntl()"
1783
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1784
with contextlib.closing(socket.socket()) as s:
1785
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1786
struct.pack(str("16s16x"),
1787
interface))
1788
interface_index = struct.unpack(str("I"),
1789
ifreq[16:20])[0]
1790
return interface_index
1791
return if_nametoindex(interface)
1792
1793
1794
2266
def daemon(nochdir = False, noclose = False):
1795
2267
"""See daemon(3). Standard BSD Unix function.
1796
2268
1804
2276
sys.exit()
1805
2277
if not noclose:
1806
2278
# Close all standard open file descriptors
1807
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2279
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1808
2280
if not stat.S_ISCHR(os.fstat(null).st_mode):
1809
raise OSError(errno.ENODEV,
1810
"%s not a character device"
1811
% os.path.devnull)
2281
raise OSError(errno.ENODEV, "{} not a character device"
2282
.format(os.devnull))
1812
2283
os.dup2(null, sys.stdin.fileno())
1813
2284
os.dup2(null, sys.stdout.fileno())
1814
2285
os.dup2(null, sys.stderr.fileno())
1823
2294
1824
2295
parser = argparse.ArgumentParser()
1825
2296
parser.add_argument("-v", "--version", action="version",
1826
version = "%%(prog)s %s" % version,
2297
version = "%(prog)s {}".format(version),
1827
2298
help="show version number and exit")
1828
2299
parser.add_argument("-i", "--interface", metavar="IF",
1829
2300
help="Bind to interface IF")
1835
2306
help="Run self-test")
1836
2307
parser.add_argument("--debug", action="store_true",
1837
2308
help="Debug mode; run in foreground and log"
1838
" to terminal")
2309
" to terminal", default=None)
1839
2310
parser.add_argument("--debuglevel", metavar="LEVEL",
1840
2311
help="Debug level for stdout output")
1841
2312
parser.add_argument("--priority", help="GnuTLS"
1848
2319
" files")
1849
2320
parser.add_argument("--no-dbus", action="store_false",
1850
2321
dest="use_dbus", help="Do not provide D-Bus"
1851
" system bus interface")
2322
" system bus interface", default=None)
1852
2323
parser.add_argument("--no-ipv6", action="store_false",
1853
dest="use_ipv6", help="Do not use IPv6")
2324
dest="use_ipv6", help="Do not use IPv6",
2325
default=None)
2326
parser.add_argument("--no-restore", action="store_false",
2327
dest="restore", help="Do not restore stored"
2328
" state", default=None)
2329
parser.add_argument("--socket", type=int,
2330
help="Specify a file descriptor to a network"
2331
" socket to use instead of creating one")
2332
parser.add_argument("--statedir", metavar="DIR",
2333
help="Directory to save/restore state in")
2334
parser.add_argument("--foreground", action="store_true",
2335
help="Run in foreground", default=None)
2336
parser.add_argument("--no-zeroconf", action="store_false",
2337
dest="zeroconf", help="Do not use Zeroconf",
2338
default=None)
2339
1854
2340
options = parser.parse_args()
1855
2341
1856
2342
if options.check:
1857
2343
import doctest
1858
doctest.testmod()
1859
sys.exit()
2344
fail_count, test_count = doctest.testmod()
2345
sys.exit(os.EX_OK if fail_count == 0 else 1)
1860
2346
1861
2347
# Default values for config file for server-global settings
1862
2348
server_defaults = { "interface": "",
1864
2350
"port": "",
1865
2351
"debug": "False",
1866
2352
"priority":
1867
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2353
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1868
2354
"servicename": "Mandos",
1869
2355
"use_dbus": "True",
1870
2356
"use_ipv6": "True",
1871
2357
"debuglevel": "",
2358
"restore": "True",
2359
"socket": "",
2360
"statedir": "/var/lib/mandos",
2361
"foreground": "False",
2362
"zeroconf": "True",
1872
2363
}
1873
2364
1874
2365
# Parse config file for server-global settings
1879
2370
# Convert the SafeConfigParser object to a dict
1880
2371
server_settings = server_config.defaults()
1881
2372
# Use the appropriate methods on the non-string config options
1882
for option in ("debug", "use_dbus", "use_ipv6"):
2373
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1883
2374
server_settings[option] = server_config.getboolean("DEFAULT",
1884
2375
option)
1885
2376
if server_settings["port"]:
1886
2377
server_settings["port"] = server_config.getint("DEFAULT",
1887
2378
"port")
2379
if server_settings["socket"]:
2380
server_settings["socket"] = server_config.getint("DEFAULT",
2381
"socket")
2382
# Later, stdin will, and stdout and stderr might, be dup'ed
2383
# over with an opened os.devnull. But we don't want this to
2384
# happen with a supplied network socket.
2385
if 0 <= server_settings["socket"] <= 2:
2386
server_settings["socket"] = os.dup(server_settings
2387
["socket"])
1888
2388
del server_config
1889
2389
1890
2390
# Override the settings from the config file with command line
1891
2391
# options, if set.
1892
2392
for option in ("interface", "address", "port", "debug",
1893
2393
"priority", "servicename", "configdir",
1894
"use_dbus", "use_ipv6", "debuglevel"):
2394
"use_dbus", "use_ipv6", "debuglevel", "restore",
2395
"statedir", "socket", "foreground", "zeroconf"):
1895
2396
value = getattr(options, option)
1896
2397
if value is not None:
1897
2398
server_settings[option] = value
1898
2399
del options
1899
2400
# Force all strings to be unicode
1900
2401
for option in server_settings.keys():
1901
if type(server_settings[option]) is str:
1902
server_settings[option] = unicode(server_settings[option])
2402
if isinstance(server_settings[option], bytes):
2403
server_settings[option] = (server_settings[option]
2404
.decode("utf-8"))
2405
# Force all boolean options to be boolean
2406
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2407
"foreground", "zeroconf"):
2408
server_settings[option] = bool(server_settings[option])
2409
# Debug implies foreground
2410
if server_settings["debug"]:
2411
server_settings["foreground"] = True
1903
2412
# Now we have our good server settings in "server_settings"
1904
2413
1905
2414
##################################################################
1906
2415
2416
if (not server_settings["zeroconf"] and
2417
not (server_settings["port"]
2418
or server_settings["socket"] != "")):
2419
parser.error("Needs port or socket to work without"
2420
" Zeroconf")
2421
1907
2422
# For convenience
1908
2423
debug = server_settings["debug"]
1909
2424
debuglevel = server_settings["debuglevel"]
1910
2425
use_dbus = server_settings["use_dbus"]
1911
2426
use_ipv6 = server_settings["use_ipv6"]
2427
stored_state_path = os.path.join(server_settings["statedir"],
2428
stored_state_file)
2429
foreground = server_settings["foreground"]
2430
zeroconf = server_settings["zeroconf"]
2431
2432
if debug:
2433
initlogger(debug, logging.DEBUG)
2434
else:
2435
if not debuglevel:
2436
initlogger(debug)
2437
else:
2438
level = getattr(logging, debuglevel.upper())
2439
initlogger(debug, level)
1912
2440
1913
2441
if server_settings["servicename"] != "Mandos":
1914
2442
syslogger.setFormatter(logging.Formatter
1915
('Mandos (%s) [%%(process)d]:'
1916
' %%(levelname)s: %%(message)s'
1917
% server_settings["servicename"]))
2443
('Mandos ({}) [%(process)d]:'
2444
' %(levelname)s: %(message)s'
2445
.format(server_settings
2446
["servicename"])))
1918
2447
1919
2448
# Parse config file with clients
1920
client_defaults = { "timeout": "5m",
1921
"extended_timeout": "15m",
1922
"interval": "2m",
1923
"checker": "fping -q -- %%(host)s",
1924
"host": "",
1925
"approval_delay": "0s",
1926
"approval_duration": "1s",
1927
}
1928
client_config = configparser.SafeConfigParser(client_defaults)
2449
client_config = configparser.SafeConfigParser(Client
2450
.client_defaults)
1929
2451
client_config.read(os.path.join(server_settings["configdir"],
1930
2452
"clients.conf"))
1931
2453
1932
2454
global mandos_dbus_service
1933
2455
mandos_dbus_service = None
1934
2456
2457
socketfd = None
2458
if server_settings["socket"] != "":
2459
socketfd = server_settings["socket"]
1935
2460
tcp_server = MandosServer((server_settings["address"],
1936
2461
server_settings["port"]),
1937
2462
ClientHandler,
1940
2465
use_ipv6=use_ipv6,
1941
2466
gnutls_priority=
1942
2467
server_settings["priority"],
1943
use_dbus=use_dbus)
1944
if not debug:
1945
pidfilename = "/var/run/mandos.pid"
2468
use_dbus=use_dbus,
2469
socketfd=socketfd)
2470
if not foreground:
2471
pidfilename = "/run/mandos.pid"
2472
if not os.path.isdir("/run/."):
2473
pidfilename = "/var/run/mandos.pid"
2474
pidfile = None
1946
2475
try:
1947
2476
pidfile = open(pidfilename, "w")
1948
except IOError:
1949
logger.error("Could not open file %r", pidfilename)
2477
except IOError as e:
2478
logger.error("Could not open file %r", pidfilename,
2479
exc_info=e)
1950
2480
1951
try:
1952
uid = pwd.getpwnam("_mandos").pw_uid
1953
gid = pwd.getpwnam("_mandos").pw_gid
1954
except KeyError:
2481
for name in ("_mandos", "mandos", "nobody"):
1955
2482
try:
1956
uid = pwd.getpwnam("mandos").pw_uid
1957
gid = pwd.getpwnam("mandos").pw_gid
2483
uid = pwd.getpwnam(name).pw_uid
2484
gid = pwd.getpwnam(name).pw_gid
2485
break
1958
2486
except KeyError:
1959
try:
1960
uid = pwd.getpwnam("nobody").pw_uid
1961
gid = pwd.getpwnam("nobody").pw_gid
1962
except KeyError:
1963
uid = 65534
1964
gid = 65534
2487
continue
2488
else:
2489
uid = 65534
2490
gid = 65534
1965
2491
try:
1966
2492
os.setgid(gid)
1967
2493
os.setuid(uid)
1968
2494
except OSError as error:
1969
if error[0] != errno.EPERM:
1970
raise error
1971
1972
if not debug and not debuglevel:
1973
syslogger.setLevel(logging.WARNING)
1974
console.setLevel(logging.WARNING)
1975
if debuglevel:
1976
level = getattr(logging, debuglevel.upper())
1977
syslogger.setLevel(level)
1978
console.setLevel(level)
2495
if error.errno != errno.EPERM:
2496
raise
1979
2497
1980
2498
if debug:
1981
2499
# Enable all possible GnuTLS debugging
1992
2510
.gnutls_global_set_log_function(debug_gnutls))
1993
2511
1994
2512
# Redirect stdin so all checkers get /dev/null
1995
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2513
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1996
2514
os.dup2(null, sys.stdin.fileno())
1997
2515
if null > 2:
1998
2516
os.close(null)
1999
else:
2000
# No console logging
2001
logger.removeHandler(console)
2002
2517
2003
2518
# Need to fork before connecting to D-Bus
2004
if not debug:
2519
if not foreground:
2005
2520
# Close all input and output, do double fork, etc.
2006
2521
daemon()
2007
2522
2523
# multiprocessing will use threads, so before we use gobject we
2524
# need to inform gobject that threads will be used.
2525
gobject.threads_init()
2526
2008
2527
global main_loop
2009
2528
# From the Avahi example code
2010
DBusGMainLoop(set_as_default=True )
2529
DBusGMainLoop(set_as_default=True)
2011
2530
main_loop = gobject.MainLoop()
2012
2531
bus = dbus.SystemBus()
2013
2532
# End of Avahi example code
2019
2538
("se.bsnet.fukt.Mandos", bus,
2020
2539
do_not_queue=True))
2021
2540
except dbus.exceptions.NameExistsException as e:
2022
logger.error(unicode(e) + ", disabling D-Bus")
2541
logger.error("Disabling D-Bus:", exc_info=e)
2023
2542
use_dbus = False
2024
2543
server_settings["use_dbus"] = False
2025
2544
tcp_server.use_dbus = False
2026
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2027
service = AvahiService(name = server_settings["servicename"],
2028
servicetype = "_mandos._tcp",
2029
protocol = protocol, bus = bus)
2030
if server_settings["interface"]:
2031
service.interface = (if_nametoindex
2032
(str(server_settings["interface"])))
2545
if zeroconf:
2546
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2547
service = AvahiServiceToSyslog(name =
2548
server_settings["servicename"],
2549
servicetype = "_mandos._tcp",
2550
protocol = protocol, bus = bus)
2551
if server_settings["interface"]:
2552
service.interface = (if_nametoindex
2553
(server_settings["interface"]
2554
.encode("utf-8")))
2033
2555
2034
2556
global multiprocessing_manager
2035
2557
multiprocessing_manager = multiprocessing.Manager()
2036
2558
2037
2559
client_class = Client
2038
2560
if use_dbus:
2039
client_class = functools.partial(ClientDBusTransitional,
2040
bus = bus)
2041
def client_config_items(config, section):
2042
special_settings = {
2043
"approved_by_default":
2044
lambda: config.getboolean(section,
2045
"approved_by_default"),
2046
}
2047
for name, value in config.items(section):
2561
client_class = functools.partial(ClientDBus, bus = bus)
2562
2563
client_settings = Client.config_parser(client_config)
2564
old_client_settings = {}
2565
clients_data = {}
2566
2567
# This is used to redirect stdout and stderr for checker processes
2568
global wnull
2569
wnull = open(os.devnull, "w") # A writable /dev/null
2570
# Only used if server is running in foreground but not in debug
2571
# mode
2572
if debug or not foreground:
2573
wnull.close()
2574
2575
# Get client data and settings from last running state.
2576
if server_settings["restore"]:
2577
try:
2578
with open(stored_state_path, "rb") as stored_state:
2579
clients_data, old_client_settings = (pickle.load
2580
(stored_state))
2581
os.remove(stored_state_path)
2582
except IOError as e:
2583
if e.errno == errno.ENOENT:
2584
logger.warning("Could not load persistent state: {}"
2585
.format(os.strerror(e.errno)))
2586
else:
2587
logger.critical("Could not load persistent state:",
2588
exc_info=e)
2589
raise
2590
except EOFError as e:
2591
logger.warning("Could not load persistent state: "
2592
"EOFError:", exc_info=e)
2593
2594
with PGPEngine() as pgp:
2595
for client_name, client in clients_data.items():
2596
# Skip removed clients
2597
if client_name not in client_settings:
2598
continue
2599
2600
# Decide which value to use after restoring saved state.
2601
# We have three different values: Old config file,
2602
# new config file, and saved state.
2603
# New config value takes precedence if it differs from old
2604
# config value, otherwise use saved state.
2605
for name, value in client_settings[client_name].items():
2606
try:
2607
# For each value in new config, check if it
2608
# differs from the old config value (Except for
2609
# the "secret" attribute)
2610
if (name != "secret" and
2611
value != old_client_settings[client_name]
2612
[name]):
2613
client[name] = value
2614
except KeyError:
2615
pass
2616
2617
# Clients who has passed its expire date can still be
2618
# enabled if its last checker was successful. Clients
2619
# whose checker succeeded before we stored its state is
2620
# assumed to have successfully run all checkers during
2621
# downtime.
2622
if client["enabled"]:
2623
if datetime.datetime.utcnow() >= client["expires"]:
2624
if not client["last_checked_ok"]:
2625
logger.warning(
2626
"disabling client {} - Client never "
2627
"performed a successful checker"
2628
.format(client_name))
2629
client["enabled"] = False
2630
elif client["last_checker_status"] != 0:
2631
logger.warning(
2632
"disabling client {} - Client last"
2633
" checker failed with error code {}"
2634
.format(client_name,
2635
client["last_checker_status"]))
2636
client["enabled"] = False
2637
else:
2638
client["expires"] = (datetime.datetime
2639
.utcnow()
2640
+ client["timeout"])
2641
logger.debug("Last checker succeeded,"
2642
" keeping {} enabled"
2643
.format(client_name))
2048
2644
try:
2049
yield (name, special_settings[name]())
2050
except KeyError:
2051
yield (name, value)
2052
2053
tcp_server.clients.update(set(
2054
client_class(name = section,
2055
config= dict(client_config_items(
2056
client_config, section)))
2057
for section in client_config.sections()))
2645
client["secret"] = (
2646
pgp.decrypt(client["encrypted_secret"],
2647
client_settings[client_name]
2648
["secret"]))
2649
except PGPError:
2650
# If decryption fails, we use secret from new settings
2651
logger.debug("Failed to decrypt {} old secret"
2652
.format(client_name))
2653
client["secret"] = (
2654
client_settings[client_name]["secret"])
2655
2656
# Add/remove clients based on new changes made to config
2657
for client_name in (set(old_client_settings)
2658
- set(client_settings)):
2659
del clients_data[client_name]
2660
for client_name in (set(client_settings)
2661
- set(old_client_settings)):
2662
clients_data[client_name] = client_settings[client_name]
2663
2664
# Create all client objects
2665
for client_name, client in clients_data.items():
2666
tcp_server.clients[client_name] = client_class(
2667
name = client_name, settings = client,
2668
server_settings = server_settings)
2669
2058
2670
if not tcp_server.clients:
2059
2671
logger.warning("No clients defined")
2060
2061
if not debug:
2062
try:
2063
with pidfile:
2064
pid = os.getpid()
2065
pidfile.write(str(pid) + "\n".encode("utf-8"))
2066
del pidfile
2067
except IOError:
2068
logger.error("Could not write to file %r with PID %d",
2069
pidfilename, pid)
2070
except NameError:
2071
# "pidfile" was never created
2072
pass
2672
2673
if not foreground:
2674
if pidfile is not None:
2675
try:
2676
with pidfile:
2677
pid = os.getpid()
2678
pidfile.write("{}\n".format(pid).encode("utf-8"))
2679
except IOError:
2680
logger.error("Could not write to file %r with PID %d",
2681
pidfilename, pid)
2682
del pidfile
2073
2683
del pidfilename
2074
2075
signal.signal(signal.SIGINT, signal.SIG_IGN)
2076
2684
2077
2685
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2078
2686
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2079
2687
2080
2688
if use_dbus:
2081
class MandosDBusService(dbus.service.Object):
2689
@alternate_dbus_interfaces({"se.recompile.Mandos":
2690
"se.bsnet.fukt.Mandos"})
2691
class MandosDBusService(DBusObjectWithProperties):
2082
2692
"""A D-Bus proxy object"""
2083
2693
def __init__(self):
2084
2694
dbus.service.Object.__init__(self, bus, "/")
2085
2695
_interface = "se.recompile.Mandos"
2086
2696
2697
@dbus_interface_annotations(_interface)
2698
def _foo(self):
2699
return { "org.freedesktop.DBus.Property"
2700
".EmitsChangedSignal":
2701
"false"}
2702
2087
2703
@dbus.service.signal(_interface, signature="o")
2088
2704
def ClientAdded(self, objpath):
2089
2705
"D-Bus signal"
2103
2719
def GetAllClients(self):
2104
2720
"D-Bus method"
2105
2721
return dbus.Array(c.dbus_object_path
2106
for c in tcp_server.clients)
2722
for c in
2723
tcp_server.clients.itervalues())
2107
2724
2108
2725
@dbus.service.method(_interface,
2109
2726
out_signature="a{oa{sv}}")
2110
2727
def GetAllClientsWithProperties(self):
2111
2728
"D-Bus method"
2112
2729
return dbus.Dictionary(
2113
((c.dbus_object_path, c.GetAll(""))
2114
for c in tcp_server.clients),
2730
{ c.dbus_object_path: c.GetAll("")
2731
for c in tcp_server.clients.itervalues() },
2115
2732
signature="oa{sv}")
2116
2733
2117
2734
@dbus.service.method(_interface, in_signature="o")
2118
2735
def RemoveClient(self, object_path):
2119
2736
"D-Bus method"
2120
for c in tcp_server.clients:
2737
for c in tcp_server.clients.itervalues():
2121
2738
if c.dbus_object_path == object_path:
2122
tcp_server.clients.remove(c)
2739
del tcp_server.clients[c.name]
2123
2740
c.remove_from_connection()
2124
2741
# Don't signal anything except ClientRemoved
2125
2742
c.disable(quiet=True)
2130
2747
2131
2748
del _interface
2132
2749
2133
class MandosDBusServiceTransitional(MandosDBusService):
2134
__metaclass__ = AlternateDBusNamesMetaclass
2135
mandos_dbus_service = MandosDBusServiceTransitional()
2750
mandos_dbus_service = MandosDBusService()
2136
2751
2137
2752
def cleanup():
2138
2753
"Cleanup function; run on exit"
2139
service.cleanup()
2754
if zeroconf:
2755
service.cleanup()
2140
2756
2141
2757
multiprocessing.active_children()
2758
wnull.close()
2759
if not (tcp_server.clients or client_settings):
2760
return
2761
2762
# Store client before exiting. Secrets are encrypted with key
2763
# based on what config file has. If config file is
2764
# removed/edited, old secret will thus be unrecovable.
2765
clients = {}
2766
with PGPEngine() as pgp:
2767
for client in tcp_server.clients.itervalues():
2768
key = client_settings[client.name]["secret"]
2769
client.encrypted_secret = pgp.encrypt(client.secret,
2770
key)
2771
client_dict = {}
2772
2773
# A list of attributes that can not be pickled
2774
# + secret.
2775
exclude = { "bus", "changedstate", "secret",
2776
"checker", "server_settings" }
2777
for name, typ in (inspect.getmembers
2778
(dbus.service.Object)):
2779
exclude.add(name)
2780
2781
client_dict["encrypted_secret"] = (client
2782
.encrypted_secret)
2783
for attr in client.client_structure:
2784
if attr not in exclude:
2785
client_dict[attr] = getattr(client, attr)
2786
2787
clients[client.name] = client_dict
2788
del client_settings[client.name]["secret"]
2789
2790
try:
2791
with (tempfile.NamedTemporaryFile
2792
(mode='wb', suffix=".pickle", prefix='clients-',
2793
dir=os.path.dirname(stored_state_path),
2794
delete=False)) as stored_state:
2795
pickle.dump((clients, client_settings), stored_state)
2796
tempname=stored_state.name
2797
os.rename(tempname, stored_state_path)
2798
except (IOError, OSError) as e:
2799
if not debug:
2800
try:
2801
os.remove(tempname)
2802
except NameError:
2803
pass
2804
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2805
logger.warning("Could not save persistent state: {}"
2806
.format(os.strerror(e.errno)))
2807
else:
2808
logger.warning("Could not save persistent state:",
2809
exc_info=e)
2810
raise
2811
2812
# Delete all clients, and settings from config
2142
2813
while tcp_server.clients:
2143
client = tcp_server.clients.pop()
2814
name, client = tcp_server.clients.popitem()
2144
2815
if use_dbus:
2145
2816
client.remove_from_connection()
2146
client.disable_hook = None
2147
2817
# Don't signal anything except ClientRemoved
2148
2818
client.disable(quiet=True)
2149
2819
if use_dbus:
2151
2821
mandos_dbus_service.ClientRemoved(client
2152
2822
.dbus_object_path,
2153
2823
client.name)
2824
client_settings.clear()
2154
2825
2155
2826
atexit.register(cleanup)
2156
2827
2157
for client in tcp_server.clients:
2828
for client in tcp_server.clients.itervalues():
2158
2829
if use_dbus:
2159
2830
# Emit D-Bus signal
2160
2831
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2161
client.enable()
2832
# Need to initiate checking of clients
2833
if client.enabled:
2834
client.init_checker()
2162
2835
2163
2836
tcp_server.enable()
2164
2837
tcp_server.server_activate()
2165
2838
2166
2839
# Find out what port we got
2167
service.port = tcp_server.socket.getsockname()[1]
2840
if zeroconf:
2841
service.port = tcp_server.socket.getsockname()[1]
2168
2842
if use_ipv6:
2169
2843
logger.info("Now listening on address %r, port %d,"
2170
" flowinfo %d, scope_id %d"
2171
% tcp_server.socket.getsockname())
2844
" flowinfo %d, scope_id %d",
2845
*tcp_server.socket.getsockname())
2172
2846
else: # IPv4
2173
logger.info("Now listening on address %r, port %d"
2174
% tcp_server.socket.getsockname())
2847
logger.info("Now listening on address %r, port %d",
2848
*tcp_server.socket.getsockname())
2175
2849
2176
2850
#service.interface = tcp_server.socket.getsockname()[3]
2177
2851
2178
2852
try:
2179
# From the Avahi example code
2180
try:
2181
service.activate()
2182
except dbus.exceptions.DBusException as error:
2183
logger.critical("DBusException: %s", error)
2184
cleanup()
2185
sys.exit(1)
2186
# End of Avahi example code
2853
if zeroconf:
2854
# From the Avahi example code
2855
try:
2856
service.activate()
2857
except dbus.exceptions.DBusException as error:
2858
logger.critical("D-Bus Exception", exc_info=error)
2859
cleanup()
2860
sys.exit(1)
2861
# End of Avahi example code
2187
2862
2188
2863
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2189
2864
lambda *args, **kwargs:
2193
2868
logger.debug("Starting main loop")
2194
2869
main_loop.run()
2195
2870
except AvahiError as error:
2196
logger.critical("AvahiError: %s", error)
2871
logger.critical("Avahi Error", exc_info=error)
2197
2872
cleanup()
2198
2873
sys.exit(1)
2199
2874
except KeyboardInterrupt:
2204
2879
# Must run before the D-Bus bus name gets deregistered
2205
2880
cleanup()
2206
2881
2207
2208
2882
if __name__ == '__main__':
2209
2883
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0