/mandos/release : revision 282

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#!/usr/bin/python2.7

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#!/usr/bin/python

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# -*- mode: python; coding: utf-8 -*-

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#

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# Mandos server - give out binary blobs to connecting clients.

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# "AvahiService" class, and some lines in "main".

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#

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# Everything else is

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#

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# This program is free software: you can redistribute it and/or modify

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# it under the terms of the GNU General Public License as published by

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# along with this program. If not, see

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# <http://www.gnu.org/licenses/>.

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#

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# Contact the authors at <mandos@recompile.se>.

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# Contact the authors at <mandos@fukt.bsnet.se>.

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import SocketServer as socketserver

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import socket

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import argparse

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import optparse

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import datetime

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import errno

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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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 codecs

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import dbus

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import dbus.service

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try:

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import gobject

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except ImportError:

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from gi.repository import GObject as gobject

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import gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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except ImportError:

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.1"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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ctypes.util.find_library("c")).if_nametoindex

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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"Get an interface index the hard way, i.e. using fcntl()"

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SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h

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with contextlib.closing(socket.socket()) as s:

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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struct.pack(b"16s16x", interface))

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interface_index = struct.unpack("I", ifreq[16:20])[0]

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return interface_index

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def initlogger(debug, level=logging.WARNING):

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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('Mandos [%(process)d]: %(levelname)s:'

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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"""Exception if encryption/decryption fails"""

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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.

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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

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encoded = (b"mandos" + password.replace(b"\\", b"\\\\")

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.replace(b"\n", b"\\n")

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.replace(b"\0", b"\\x00"))

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) 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)

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ciphertext, err = proc.communicate(input = data)

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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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)

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decrypted_plaintext, err = proc.communicate(input = 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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version = "1.2.3"

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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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class AvahiError(Exception):

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def __init__(self, value, *args, **kwargs):

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self.value = value

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return super(AvahiError, self).__init__(value, *args,

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**kwargs)

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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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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(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 <https://www.iana.org/assignments/service-names-port-numbers>

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See <http://www.dns-sd.org/ServiceTypes.html>

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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domain: string; Domain to publish on, default to .local if empty.

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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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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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.group = None # our entry group

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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, remove=True):

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def rename(self):

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"""Derived from the Avahi example code"""

295

156

if self.rename_count >= self.max_renames:

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157

logger.critical("No suitable Zeroconf service name found"

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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 = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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self.name = unicode(self.server.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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if remove:

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self.remove()

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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:

310

if (error.get_dbus_name()

311

== "org.freedesktop.Avahi.CollisionError"):

312

logger.info("Local Zeroconf service name collision.")

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return self.rename(remove=False)

314

else:

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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)

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except dbus.exceptions.DBusException, error:

172

logger.critical("DBusException: %s", error)

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self.cleanup()

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os._exit(1)

175

self.rename_count += 1

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176

def remove(self):

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"""Derived from the Avahi example code"""

321

if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match.remove()

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self.entry_group_state_changed_match = None

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178

if self.group is not None:

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self.group.Reset()

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def add(self):

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"""Derived from the Avahi example code"""

329

self.remove()

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182

if self.group is None:

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183

self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew()),

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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self.group.connect_to_signal('StateChanged',

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self

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.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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self.group.AddService(

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198

dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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350

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def entry_group_state_changed(self, state, error):

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"""Derived from the Avahi example code"""

352

203

logger.debug("Avahi entry group state change: %i", state)

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209

self.rename()

359

210

elif state == avahi.ENTRY_GROUP_FAILURE:

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211

logger.critical("Avahi: Error in group state changed %s",

361

str(error))

362

raise AvahiGroupError("State changed: {!s}".format(error))

363

212

unicode(error))

213

raise AvahiGroupError("State changed: %s"

214

% unicode(error))

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215

def cleanup(self):

365

216

"""Derived from the Avahi example code"""

366

217

if self.group is not None:

367

try:

368

self.group.Free()

369

except (dbus.exceptions.UnknownMethodException,

370

dbus.exceptions.DBusException):

371

pass

218

self.group.Free()

372

219

self.group = None

373

self.remove()

374

375

def server_state_changed(self, state, error=None):

220

def server_state_changed(self, state):

376

221

"""Derived from the Avahi example code"""

377

222

logger.debug("Avahi server state change: %i", state)

378

bad_states = {

379

avahi.SERVER_INVALID: "Zeroconf server invalid",

380

avahi.SERVER_REGISTERING: None,

381

avahi.SERVER_COLLISION: "Zeroconf server name collision",

382

avahi.SERVER_FAILURE: "Zeroconf server failure",

383

}

384

if state in bad_states:

385

if bad_states[state] is not None:

386

if error is None:

387

logger.error(bad_states[state])

388

else:

389

logger.error(bad_states[state] + ": %r", error)

390

self.cleanup()

223

if state == avahi.SERVER_COLLISION:

224

logger.error("Zeroconf server name collision")

225

self.remove()

391

226

elif state == avahi.SERVER_RUNNING:

392

try:

393

self.add()

394

except dbus.exceptions.DBusException as error:

395

if (error.get_dbus_name()

396

== "org.freedesktop.Avahi.CollisionError"):

397

logger.info("Local Zeroconf service name"

398

" collision.")

399

return self.rename(remove=False)

400

else:

401

logger.critical("D-Bus Exception", exc_info=error)

402

self.cleanup()

403

os._exit(1)

404

else:

405

if error is None:

406

logger.debug("Unknown state: %r", state)

407

else:

408

logger.debug("Unknown state: %r: %r", state, error)

409

227

self.add()

410

228

def activate(self):

411

229

"""Derived from the Avahi example code"""

412

230

if self.server is None:

413

231

self.server = dbus.Interface(

414

232

self.bus.get_object(avahi.DBUS_NAME,

415

avahi.DBUS_PATH_SERVER,

416

follow_name_owner_changes=True),

233

avahi.DBUS_PATH_SERVER),

417

234

avahi.DBUS_INTERFACE_SERVER)

418

235

self.server.connect_to_signal("StateChanged",

419

self.server_state_changed)

236

self.server_state_changed)

420

237

self.server_state_changed(self.server.GetState())

421

238

422

239

423

class AvahiServiceToSyslog(AvahiService):

424

def rename(self, *args, **kwargs):

425

"""Add the new name to the syslog messages"""

426

ret = AvahiService.rename(self, *args, **kwargs)

427

syslogger.setFormatter(logging.Formatter(

428

'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'

429

.format(self.name)))

430

return ret

431

432

# Pretend that we have a GnuTLS module

433

class GnuTLS(object):

434

"""This isn't so much a class as it is a module-like namespace.

435

It is instantiated once, and simulates having a GnuTLS module."""

436

437

_library = ctypes.cdll.LoadLibrary(

438

ctypes.util.find_library("gnutls"))

439

_need_version = "3.3.0"

440

def __init__(self):

441

# Need to use class name "GnuTLS" here, since this method is

442

# called before the assignment to the "gnutls" global variable

443

# happens.

444

if GnuTLS.check_version(self._need_version) is None:

445

raise GnuTLS.Error("Needs GnuTLS {} or later"

446

.format(self._need_version))

447

448

# Unless otherwise indicated, the constants and types below are

449

# all from the gnutls/gnutls.h C header file.

450

451

# Constants

452

E_SUCCESS = 0

453

CRT_OPENPGP = 2

454

CLIENT = 2

455

SHUT_RDWR = 0

456

CRD_CERTIFICATE = 1

457

E_NO_CERTIFICATE_FOUND = -49

458

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

459

460

# Types

461

class session_int(ctypes.Structure):

462

_fields_ = []

463

session_t = ctypes.POINTER(session_int)

464

class certificate_credentials_st(ctypes.Structure):

465

_fields_ = []

466

certificate_credentials_t = ctypes.POINTER(

467

certificate_credentials_st)

468

certificate_type_t = ctypes.c_int

469

class datum_t(ctypes.Structure):

470

_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),

471

('size', ctypes.c_uint)]

472

class openpgp_crt_int(ctypes.Structure):

473

_fields_ = []

474

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

475

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

476

log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)

477

credentials_type_t = ctypes.c_int #

478

transport_ptr_t = ctypes.c_void_p

479

close_request_t = ctypes.c_int

480

481

# Exceptions

482

class Error(Exception):

483

# We need to use the class name "GnuTLS" here, since this

484

# exception might be raised from within GnuTLS.__init__,

485

# which is called before the assignment to the "gnutls"

486

# global variable happens.

487

def __init__(self, message = None, code = None, args=()):

488

# Default usage is by a message string, but if a return

489

# code is passed, convert it to a string with

490

# gnutls.strerror()

491

if message is None and code is not None:

492

message = GnuTLS.strerror(code)

493

return super(GnuTLS.Error, self).__init__(

494

message, *args)

495

496

class CertificateSecurityError(Error):

497

pass

498

499

# Classes

500

class Credentials(object):

501

def __init__(self):

502

self._c_object = gnutls.certificate_credentials_t()

503

gnutls.certificate_allocate_credentials(

504

ctypes.byref(self._c_object))

505

self.type = gnutls.CRD_CERTIFICATE

506

507

def __del__(self):

508

gnutls.certificate_free_credentials(self._c_object)

509

510

class ClientSession(object):

511

def __init__(self, socket, credentials = None):

512

self._c_object = gnutls.session_t()

513

gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)

514

gnutls.set_default_priority(self._c_object)

515

gnutls.transport_set_ptr(self._c_object, socket.fileno())

516

gnutls.handshake_set_private_extensions(self._c_object,

517

True)

518

self.socket = socket

519

if credentials is None:

520

credentials = gnutls.Credentials()

521

gnutls.credentials_set(self._c_object, credentials.type,

522

ctypes.cast(credentials._c_object,

523

ctypes.c_void_p))

524

self.credentials = credentials

525

526

def __del__(self):

527

gnutls.deinit(self._c_object)

528

529

def handshake(self):

530

return gnutls.handshake(self._c_object)

531

532

def send(self, data):

533

data = bytes(data)

534

if not data:

535

return 0

536

return gnutls.record_send(self._c_object, data, len(data))

537

538

def bye(self):

539

return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)

540

541

# Error handling function

542

def _error_code(result):

543

"""A function to raise exceptions on errors, suitable

544

for the 'restype' attribute on ctypes functions"""

545

if result >= 0:

546

return result

547

if result == gnutls.E_NO_CERTIFICATE_FOUND:

548

raise gnutls.CertificateSecurityError(code = result)

549

raise gnutls.Error(code = result)

550

551

# Unless otherwise indicated, the function declarations below are

552

# all from the gnutls/gnutls.h C header file.

553

554

# Functions

555

priority_set_direct = _library.gnutls_priority_set_direct

556

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

557

ctypes.POINTER(ctypes.c_char_p)]

558

priority_set_direct.restype = _error_code

559

560

init = _library.gnutls_init

561

init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]

562

init.restype = _error_code

563

564

set_default_priority = _library.gnutls_set_default_priority

565

set_default_priority.argtypes = [session_t]

566

set_default_priority.restype = _error_code

567

568

record_send = _library.gnutls_record_send

569

record_send.argtypes = [session_t, ctypes.c_void_p,

570

ctypes.c_size_t]

571

record_send.restype = ctypes.c_ssize_t

572

573

certificate_allocate_credentials = (

574

_library.gnutls_certificate_allocate_credentials)

575

certificate_allocate_credentials.argtypes = [

576

ctypes.POINTER(certificate_credentials_t)]

577

certificate_allocate_credentials.restype = _error_code

578

579

certificate_free_credentials = (

580

_library.gnutls_certificate_free_credentials)

581

certificate_free_credentials.argtypes = [certificate_credentials_t]

582

certificate_free_credentials.restype = None

583

584

handshake_set_private_extensions = (

585

_library.gnutls_handshake_set_private_extensions)

586

handshake_set_private_extensions.argtypes = [session_t,

587

ctypes.c_int]

588

handshake_set_private_extensions.restype = None

589

590

credentials_set = _library.gnutls_credentials_set

591

credentials_set.argtypes = [session_t, credentials_type_t,

592

ctypes.c_void_p]

593

credentials_set.restype = _error_code

594

595

strerror = _library.gnutls_strerror

596

strerror.argtypes = [ctypes.c_int]

597

strerror.restype = ctypes.c_char_p

598

599

certificate_type_get = _library.gnutls_certificate_type_get

600

certificate_type_get.argtypes = [session_t]

601

certificate_type_get.restype = _error_code

602

603

certificate_get_peers = _library.gnutls_certificate_get_peers

604

certificate_get_peers.argtypes = [session_t,

605

ctypes.POINTER(ctypes.c_uint)]

606

certificate_get_peers.restype = ctypes.POINTER(datum_t)

607

608

global_set_log_level = _library.gnutls_global_set_log_level

609

global_set_log_level.argtypes = [ctypes.c_int]

610

global_set_log_level.restype = None

611

612

global_set_log_function = _library.gnutls_global_set_log_function

613

global_set_log_function.argtypes = [log_func]

614

global_set_log_function.restype = None

615

616

deinit = _library.gnutls_deinit

617

deinit.argtypes = [session_t]

618

deinit.restype = None

619

620

handshake = _library.gnutls_handshake

621

handshake.argtypes = [session_t]

622

handshake.restype = _error_code

623

624

transport_set_ptr = _library.gnutls_transport_set_ptr

625

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

626

transport_set_ptr.restype = None

627

628

bye = _library.gnutls_bye

629

bye.argtypes = [session_t, close_request_t]

630

bye.restype = _error_code

631

632

check_version = _library.gnutls_check_version

633

check_version.argtypes = [ctypes.c_char_p]

634

check_version.restype = ctypes.c_char_p

635

636

# All the function declarations below are from gnutls/openpgp.h

637

638

openpgp_crt_init = _library.gnutls_openpgp_crt_init

639

openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]

640

openpgp_crt_init.restype = _error_code

641

642

openpgp_crt_import = _library.gnutls_openpgp_crt_import

643

openpgp_crt_import.argtypes = [openpgp_crt_t,

644

ctypes.POINTER(datum_t),

645

openpgp_crt_fmt_t]

646

openpgp_crt_import.restype = _error_code

647

648

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

649

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

650

ctypes.POINTER(ctypes.c_uint)]

651

openpgp_crt_verify_self.restype = _error_code

652

653

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

654

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

655

openpgp_crt_deinit.restype = None

656

657

openpgp_crt_get_fingerprint = (

658

_library.gnutls_openpgp_crt_get_fingerprint)

659

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

660

ctypes.c_void_p,

661

ctypes.POINTER(

662

ctypes.c_size_t)]

663

openpgp_crt_get_fingerprint.restype = _error_code

664

665

# Remove non-public function

666

del _error_code

667

# Create the global "gnutls" object, simulating a module

668

gnutls = GnuTLS()

669

670

def call_pipe(connection, # : multiprocessing.Connection

671

func, *args, **kwargs):

672

"""This function is meant to be called by multiprocessing.Process

673

674

This function runs func(*args, **kwargs), and writes the resulting

675

return value on the provided multiprocessing.Connection.

676

"""

677

connection.send(func(*args, **kwargs))

678

connection.close()

679

680

240

class Client(object):

681

241

"""A representation of a client host served by this server.

682

242

683

243

Attributes:

684

approved: bool(); 'None' if not yet approved/disapproved

244

_approved: bool(); 'None' if not yet approved/disapproved

685

245

approval_delay: datetime.timedelta(); Time to wait for approval

686

246

approval_duration: datetime.timedelta(); Duration of one approval

687

247

checker: subprocess.Popen(); a running checker process used

694

254

instance %(name)s can be used in the command.

695

255

checker_initiator_tag: a gobject event source tag, or None

696

256

created: datetime.datetime(); (UTC) object creation

697

client_structure: Object describing what attributes a client has

698

and is used for storing the client at exit

699

257

current_checker_command: string; current running checker_command

258

disable_hook: If set, called by disable() as disable_hook(self)

700

259

disable_initiator_tag: a gobject event source tag, or None

701

260

enabled: bool()

702

261

fingerprint: string (40 or 32 hexadecimal digits); used to

705

264

interval: datetime.timedelta(); How often to start a new checker

706

265

last_approval_request: datetime.datetime(); (UTC) or None

707

266

last_checked_ok: datetime.datetime(); (UTC) or None

708

last_checker_status: integer between 0 and 255 reflecting exit

709

status of last checker. -1 reflects crashed

710

checker, -2 means no checker completed yet.

711

last_checker_signal: The signal which killed the last checker, if

712

last_checker_status is -1

713

last_enabled: datetime.datetime(); (UTC) or None

267

last_enabled: datetime.datetime(); (UTC)

714

268

name: string; from the config file, used in log messages and

715

269

D-Bus identifiers

716

270

secret: bytestring; sent verbatim (over TLS) to client

717

271

timeout: datetime.timedelta(); How long from last_checked_ok

718

272

until this client is disabled

719

extended_timeout: extra long timeout when secret has been sent

720

273

runtime_expansions: Allowed attributes for runtime expansion.

721

expires: datetime.datetime(); time (UTC) when a client will be

722

disabled, or None

723

server_settings: The server_settings dict from main()

724

274

"""

725

275

726

276

runtime_expansions = ("approval_delay", "approval_duration",

727

"created", "enabled", "expires",

728

"fingerprint", "host", "interval",

729

"last_approval_request", "last_checked_ok",

277

"created", "enabled", "fingerprint",

278

"host", "interval", "last_checked_ok",

730

279

"last_enabled", "name", "timeout")

731

client_defaults = {

732

"timeout": "PT5M",

733

"extended_timeout": "PT15M",

734

"interval": "PT2M",

735

"checker": "fping -q -- %%(host)s",

736

"host": "",

737

"approval_delay": "PT0S",

738

"approval_duration": "PT1S",

739

"approved_by_default": "True",

740

"enabled": "True",

741

}

742

280

743

281

@staticmethod

744

def config_parser(config):

745

"""Construct a new dict of client settings of this form:

746

{ client_name: {setting_name: value, ...}, ...}

747

with exceptions for any special settings as defined above.

748

NOTE: Must be a pure function. Must return the same result

749

value given the same arguments.

750

"""

751

settings = {}

752

for client_name in config.sections():

753

section = dict(config.items(client_name))

754

client = settings[client_name] = {}

755

756

client["host"] = section["host"]

757

# Reformat values from string types to Python types

758

client["approved_by_default"] = config.getboolean(

759

client_name, "approved_by_default")

760

client["enabled"] = config.getboolean(client_name,

761

"enabled")

762

763

# Uppercase and remove spaces from fingerprint for later

764

# comparison purposes with return value from the

765

# fingerprint() function

766

client["fingerprint"] = (section["fingerprint"].upper()

767

.replace(" ", ""))

768

if "secret" in section:

769

client["secret"] = section["secret"].decode("base64")

770

elif "secfile" in section:

771

with open(os.path.expanduser(os.path.expandvars

772

(section["secfile"])),

773

"rb") as secfile:

774

client["secret"] = secfile.read()

775

else:

776

raise TypeError("No secret or secfile for section {}"

777

.format(section))

778

client["timeout"] = string_to_delta(section["timeout"])

779

client["extended_timeout"] = string_to_delta(

780

section["extended_timeout"])

781

client["interval"] = string_to_delta(section["interval"])

782

client["approval_delay"] = string_to_delta(

783

section["approval_delay"])

784

client["approval_duration"] = string_to_delta(

785

section["approval_duration"])

786

client["checker_command"] = section["checker"]

787

client["last_approval_request"] = None

788

client["last_checked_ok"] = None

789

client["last_checker_status"] = -2

790

791

return settings

792

793

def __init__(self, settings, name = None, server_settings=None):

282

def _timedelta_to_milliseconds(td):

283

"Convert a datetime.timedelta() to milliseconds"

284

return ((td.days * 24 * 60 * 60 * 1000)

285

+ (td.seconds * 1000)

286

+ (td.microseconds // 1000))

287

288

def timeout_milliseconds(self):

289

"Return the 'timeout' attribute in milliseconds"

290

return self._timedelta_to_milliseconds(self.timeout)

291

292

def interval_milliseconds(self):

293

"Return the 'interval' attribute in milliseconds"

294

return self._timedelta_to_milliseconds(self.interval)

295

296

def approval_delay_milliseconds(self):

297

return self._timedelta_to_milliseconds(self.approval_delay)

298

299

def __init__(self, name = None, disable_hook=None, config=None):

300

"""Note: the 'checker' key in 'config' sets the

301

'checker_command' attribute and *not* the 'checker'

302

attribute."""

794

303

self.name = name

795

if server_settings is None:

796

server_settings = {}

797

self.server_settings = server_settings

798

# adding all client settings

799

for setting, value in settings.items():

800

setattr(self, setting, value)

801

802

if self.enabled:

803

if not hasattr(self, "last_enabled"):

804

self.last_enabled = datetime.datetime.utcnow()

805

if not hasattr(self, "expires"):

806

self.expires = (datetime.datetime.utcnow()

807

+ self.timeout)

808

else:

809

self.last_enabled = None

810

self.expires = None

811

304

if config is None:

305

config = {}

812

306

logger.debug("Creating client %r", self.name)

307

# Uppercase and remove spaces from fingerprint for later

308

# comparison purposes with return value from the fingerprint()

309

# function

310

self.fingerprint = (config["fingerprint"].upper()

311

.replace(" ", ""))

813

312

logger.debug(" Fingerprint: %s", self.fingerprint)

814

self.created = settings.get("created",

815

datetime.datetime.utcnow())

816

817

# attributes specific for this server instance

313

if "secret" in config:

314

self.secret = config["secret"].decode("base64")

315

elif "secfile" in config:

316

with open(os.path.expanduser(os.path.expandvars

317

(config["secfile"])),

318

"rb") as secfile:

319

self.secret = secfile.read()

320

else:

321

raise TypeError("No secret or secfile for client %s"

322

% self.name)

323

self.host = config.get("host", "")

324

self.created = datetime.datetime.utcnow()

325

self.enabled = False

326

self.last_approval_request = None

327

self.last_enabled = None

328

self.last_checked_ok = None

329

self.timeout = string_to_delta(config["timeout"])

330

self.interval = string_to_delta(config["interval"])

331

self.disable_hook = disable_hook

818

332

self.checker = None

819

333

self.checker_initiator_tag = None

820

334

self.disable_initiator_tag = None

821

335

self.checker_callback_tag = None

336

self.checker_command = config["checker"]

822

337

self.current_checker_command = None

823

self.approved = None

338

self.last_connect = None

339

self._approved = None

340

self.approved_by_default = config.get("approved_by_default",

341

True)

824

342

self.approvals_pending = 0

825

self.changedstate = multiprocessing_manager.Condition(

826

multiprocessing_manager.Lock())

827

self.client_structure = [attr

828

for attr in self.__dict__.iterkeys()

829

if not attr.startswith("_")]

830

self.client_structure.append("client_structure")

831

832

for name, t in inspect.getmembers(

833

type(self), lambda obj: isinstance(obj, property)):

834

if not name.startswith("_"):

835

self.client_structure.append(name)

343

self.approval_delay = string_to_delta(

344

config["approval_delay"])

345

self.approval_duration = string_to_delta(

346

config["approval_duration"])

347

self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())

836

348

837

# Send notice to process children that client state has changed

838

349

def send_changedstate(self):

839

with self.changedstate:

840

self.changedstate.notify_all()

841

350

self.changedstate.acquire()

351

self.changedstate.notify_all()

352

self.changedstate.release()

353

842

354

def enable(self):

843

355

"""Start this client's checker and timeout hooks"""

844

356

if getattr(self, "enabled", False):

845

357

# Already enabled

846

358

return

847

self.expires = datetime.datetime.utcnow() + self.timeout

848

self.enabled = True

359

self.send_changedstate()

849

360

self.last_enabled = datetime.datetime.utcnow()

850

self.init_checker()

851

self.send_changedstate()

361

# Schedule a new checker to be started an 'interval' from now,

362

# and every interval from then on.

363

self.checker_initiator_tag = (gobject.timeout_add

364

(self.interval_milliseconds(),

365

self.start_checker))

366

# Schedule a disable() when 'timeout' has passed

367

self.disable_initiator_tag = (gobject.timeout_add

368

(self.timeout_milliseconds(),

369

self.disable))

370

self.enabled = True

371

# Also start a new checker *right now*.

372

self.start_checker()

852

373

853

374

def disable(self, quiet=True):

854

375

"""Disable this client."""

855

376

if not getattr(self, "enabled", False):

856

377

return False

857

378

if not quiet:

379

self.send_changedstate()

380

if not quiet:

858

381

logger.info("Disabling client %s", self.name)

859

if getattr(self, "disable_initiator_tag", None) is not None:

382

if getattr(self, "disable_initiator_tag", False):

860

383

gobject.source_remove(self.disable_initiator_tag)

861

384

self.disable_initiator_tag = None

862

self.expires = None

863

if getattr(self, "checker_initiator_tag", None) is not None:

385

if getattr(self, "checker_initiator_tag", False):

864

386

gobject.source_remove(self.checker_initiator_tag)

865

387

self.checker_initiator_tag = None

866

388

self.stop_checker()

389

if self.disable_hook:

390

self.disable_hook(self)

867

391

self.enabled = False

868

if not quiet:

869

self.send_changedstate()

870

392

# Do not run this again if called by a gobject.timeout_add

871

393

return False

872

394

873

395

def __del__(self):

396

self.disable_hook = None

874

397

self.disable()

875

398

876

def init_checker(self):

877

# Schedule a new checker to be started an 'interval' from now,

878

# and every interval from then on.

879

if self.checker_initiator_tag is not None:

880

gobject.source_remove(self.checker_initiator_tag)

881

self.checker_initiator_tag = gobject.timeout_add(

882

int(self.interval.total_seconds() * 1000),

883

self.start_checker)

884

# Schedule a disable() when 'timeout' has passed

885

if self.disable_initiator_tag is not None:

886

gobject.source_remove(self.disable_initiator_tag)

887

self.disable_initiator_tag = gobject.timeout_add(

888

int(self.timeout.total_seconds() * 1000), self.disable)

889

# Also start a new checker *right now*.

890

self.start_checker()

891

892

def checker_callback(self, source, condition, connection,

893

command):

399

def checker_callback(self, pid, condition, command):

894

400

"""The checker has completed, so take appropriate actions."""

895

401

self.checker_callback_tag = None

896

402

self.checker = None

897

# Read return code from connection (see call_pipe)

898

returncode = connection.recv()

899

connection.close()

900

901

if returncode >= 0:

902

self.last_checker_status = returncode

903

self.last_checker_signal = None

904

if self.last_checker_status == 0:

403

if os.WIFEXITED(condition):

404

exitstatus = os.WEXITSTATUS(condition)

405

if exitstatus == 0:

905

406

logger.info("Checker for %(name)s succeeded",

906

407

vars(self))

907

408

self.checked_ok()

908

409

else:

909

logger.info("Checker for %(name)s failed", vars(self))

410

logger.info("Checker for %(name)s failed",

411

vars(self))

910

412

else:

911

self.last_checker_status = -1

912

self.last_checker_signal = -returncode

913

413

logger.warning("Checker for %(name)s crashed?",

914

414

vars(self))

915

return False

916

415

917

416

def checked_ok(self):

918

"""Assert that the client has been seen, alive and well."""

417

"""Bump up the timeout for this client.

418

419

This should only be called when the client has been seen,

420

alive and well.

421

"""

919

422

self.last_checked_ok = datetime.datetime.utcnow()

920

self.last_checker_status = 0

921

self.last_checker_signal = None

922

self.bump_timeout()

923

924

def bump_timeout(self, timeout=None):

925

"""Bump up the timeout for this client."""

926

if timeout is None:

927

timeout = self.timeout

928

if self.disable_initiator_tag is not None:

929

gobject.source_remove(self.disable_initiator_tag)

930

self.disable_initiator_tag = None

931

if getattr(self, "enabled", False):

932

self.disable_initiator_tag = gobject.timeout_add(

933

int(timeout.total_seconds() * 1000), self.disable)

934

self.expires = datetime.datetime.utcnow() + timeout

423

gobject.source_remove(self.disable_initiator_tag)

424

self.disable_initiator_tag = (gobject.timeout_add

425

(self.timeout_milliseconds(),

426

self.disable))

935

427

936

428

def need_approval(self):

937

429

self.last_approval_request = datetime.datetime.utcnow()

942

434

If a checker already exists, leave it running and do

943

435

nothing."""

944

436

# The reason for not killing a running checker is that if we

945

# did that, and if a checker (for some reason) started running

946

# slowly and taking more than 'interval' time, then the client

947

# would inevitably timeout, since no checker would get a

948

# chance to run to completion. If we instead leave running

437

# did that, then if a checker (for some reason) started

438

# running slowly and taking more than 'interval' time, the

439

# client would inevitably timeout, since no checker would get

440

# a chance to run to completion. If we instead leave running

949

441

# checkers alone, the checker would have to take more time

950

442

# than 'timeout' for the client to be disabled, which is as it

951

443

# should be.

952

444

953

if self.checker is not None and not self.checker.is_alive():

954

logger.warning("Checker was not alive; joining")

955

self.checker.join()

956

self.checker = None

445

# If a checker exists, make sure it is not a zombie

446

try:

447

pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

448

except (AttributeError, OSError), error:

449

if (isinstance(error, OSError)

450

and error.errno != errno.ECHILD):

451

raise error

452

else:

453

if pid:

454

logger.warning("Checker was a zombie")

455

gobject.source_remove(self.checker_callback_tag)

456

self.checker_callback(pid, status,

457

self.current_checker_command)

957

458

# Start a new checker if needed

958

459

if self.checker is None:

959

# Escape attributes for the shell

960

escaped_attrs = {

961

attr: re.escape(str(getattr(self, attr)))

962

for attr in self.runtime_expansions }

963

460

try:

964

command = self.checker_command % escaped_attrs

965

except TypeError as error:

966

logger.error('Could not format string "%s"',

967

self.checker_command,

968

exc_info=error)

969

return True # Try again later

461

# In case checker_command has exactly one % operator

462

command = self.checker_command % self.host

463

except TypeError:

464

# Escape attributes for the shell

465

escaped_attrs = dict(

466

(attr,

467

re.escape(unicode(str(getattr(self, attr, "")),

468

errors=

469

'replace')))

470

for attr in

471

self.runtime_expansions)

472

473

try:

474

command = self.checker_command % escaped_attrs

475

except TypeError, error:

476

logger.error('Could not format string "%s":'

477

' %s', self.checker_command, error)

478

return True # Try again later

970

479

self.current_checker_command = command

971

logger.info("Starting checker %r for %s", command,

972

self.name)

973

# We don't need to redirect stdout and stderr, since

974

# in normal mode, that is already done by daemon(),

975

# and in debug mode we don't want to. (Stdin is

976

# always replaced by /dev/null.)

977

# The exception is when not debugging but nevertheless

978

# running in the foreground; use the previously

979

# created wnull.

980

popen_args = { "close_fds": True,

981

"shell": True,

982

"cwd": "/" }

983

if (not self.server_settings["debug"]

984

and self.server_settings["foreground"]):

985

popen_args.update({"stdout": wnull,

986

"stderr": wnull })

987

pipe = multiprocessing.Pipe(duplex = False)

988

self.checker = multiprocessing.Process(

989

target = call_pipe,

990

args = (pipe[1], subprocess.call, command),

991

kwargs = popen_args)

992

self.checker.start()

993

self.checker_callback_tag = gobject.io_add_watch(

994

pipe[0].fileno(), gobject.IO_IN,

995

self.checker_callback, pipe[0], command)

480

try:

481

logger.info("Starting checker %r for %s",

482

command, self.name)

483

# We don't need to redirect stdout and stderr, since

484

# in normal mode, that is already done by daemon(),

485

# and in debug mode we don't want to. (Stdin is

486

# always replaced by /dev/null.)

487

self.checker = subprocess.Popen(command,

488

close_fds=True,

489

shell=True, cwd="/")

490

self.checker_callback_tag = (gobject.child_watch_add

491

(self.checker.pid,

492

self.checker_callback,

493

data=command))

494

# The checker may have completed before the gobject

495

# watch was added. Check for this.

496

pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

497

if pid:

498

gobject.source_remove(self.checker_callback_tag)

499

self.checker_callback(pid, status, command)

500

except OSError, error:

501

logger.error("Failed to start subprocess: %s",

502

error)

996

503

# Re-run this periodically if run by gobject.timeout_add

997

504

return True

998

505

1004

511

if getattr(self, "checker", None) is None:

1005

512

return

1006

513

logger.debug("Stopping checker for %(name)s", vars(self))

1007

self.checker.terminate()

514

try:

515

os.kill(self.checker.pid, signal.SIGTERM)

516

#time.sleep(0.5)

517

#if self.checker.poll() is None:

518

# os.kill(self.checker.pid, signal.SIGKILL)

519

except OSError, error:

520

if error.errno != errno.ESRCH: # No such process

521

raise

1008

522

self.checker = None

1009

523

1010

1011

def dbus_service_property(dbus_interface,

1012

signature="v",

1013

access="readwrite",

1014

byte_arrays=False):

524

def dbus_service_property(dbus_interface, signature="v",

525

access="readwrite", byte_arrays=False):

1015

526

"""Decorators for marking methods of a DBusObjectWithProperties to

1016

527

become properties on the D-Bus.

1017

528

1026

537

# "Set" method, so we fail early here:

1027

538

if byte_arrays and signature != "ay":

1028

539

raise ValueError("Byte arrays not supported for non-'ay'"

1029

" signature {!r}".format(signature))

1030

540

" signature %r" % signature)

1031

541

def decorator(func):

1032

542

func._dbus_is_property = True

1033

543

func._dbus_interface = dbus_interface

1038

548

func._dbus_name = func._dbus_name[:-14]

1039

549

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1040

550

return func

1041

1042

return decorator

1043

1044

1045

def dbus_interface_annotations(dbus_interface):

1046

"""Decorator for marking functions returning interface annotations

1047

1048

Usage:

1049

1050

@dbus_interface_annotations("org.example.Interface")

1051

def _foo(self): # Function name does not matter

1052

return {"org.freedesktop.DBus.Deprecated": "true",

1053

"org.freedesktop.DBus.Property.EmitsChangedSignal":

1054

"false"}

1055

"""

1056

1057

def decorator(func):

1058

func._dbus_is_interface = True

1059

func._dbus_interface = dbus_interface

1060

func._dbus_name = dbus_interface

1061

return func

1062

1063

return decorator

1064

1065

1066

def dbus_annotations(annotations):

1067

"""Decorator to annotate D-Bus methods, signals or properties

1068

Usage:

1069

1070

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",

1071

"org.freedesktop.DBus.Property."

1072

"EmitsChangedSignal": "false"})

1073

@dbus_service_property("org.example.Interface", signature="b",

1074

access="r")

1075

def Property_dbus_property(self):

1076

return dbus.Boolean(False)

1077

1078

See also the DBusObjectWithAnnotations class.

1079

"""

1080

1081

def decorator(func):

1082

func._dbus_annotations = annotations

1083

return func

1084

1085

551

return decorator

1086

552

1087

553

1088

554

class DBusPropertyException(dbus.exceptions.DBusException):

1089

555

"""A base class for D-Bus property-related exceptions

1090

556

"""

1091

pass

557

def __unicode__(self):

558

return unicode(str(self))

1092

559

1093

560

1094

561

class DBusPropertyAccessException(DBusPropertyException):

1103

570

pass

1104

571

1105

572

1106

class DBusObjectWithAnnotations(dbus.service.Object):

1107

"""A D-Bus object with annotations.

1108

1109

Classes inheriting from this can use the dbus_annotations

1110

decorator to add annotations to methods or signals.

1111

"""

1112

1113

@staticmethod

1114

def _is_dbus_thing(thing):

1115

"""Returns a function testing if an attribute is a D-Bus thing

1116

1117

If called like _is_dbus_thing("method") it returns a function

1118

suitable for use as predicate to inspect.getmembers().

1119

"""

1120

return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),

1121

False)

1122

1123

def _get_all_dbus_things(self, thing):

1124

"""Returns a generator of (name, attribute) pairs

1125

"""

1126

return ((getattr(athing.__get__(self), "_dbus_name", name),

1127

athing.__get__(self))

1128

for cls in self.__class__.__mro__

1129

for name, athing in

1130

inspect.getmembers(cls, self._is_dbus_thing(thing)))

1131

1132

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1133

out_signature = "s",

1134

path_keyword = 'object_path',

1135

connection_keyword = 'connection')

1136

def Introspect(self, object_path, connection):

1137

"""Overloading of standard D-Bus method.

1138

1139

Inserts annotation tags on methods and signals.

1140

"""

1141

xmlstring = dbus.service.Object.Introspect(self, object_path,

1142

connection)

1143

try:

1144

document = xml.dom.minidom.parseString(xmlstring)

1145

1146

for if_tag in document.getElementsByTagName("interface"):

1147

# Add annotation tags

1148

for typ in ("method", "signal"):

1149

for tag in if_tag.getElementsByTagName(typ):

1150

annots = dict()

1151

for name, prop in (self.

1152

_get_all_dbus_things(typ)):

1153

if (name == tag.getAttribute("name")

1154

and prop._dbus_interface

1155

== if_tag.getAttribute("name")):

1156

annots.update(getattr(

1157

prop, "_dbus_annotations", {}))

1158

for name, value in annots.items():

1159

ann_tag = document.createElement(

1160

"annotation")

1161

ann_tag.setAttribute("name", name)

1162

ann_tag.setAttribute("value", value)

1163

tag.appendChild(ann_tag)

1164

# Add interface annotation tags

1165

for annotation, value in dict(

1166

itertools.chain.from_iterable(

1167

annotations().items()

1168

for name, annotations

1169

in self._get_all_dbus_things("interface")

1170

if name == if_tag.getAttribute("name")

1171

)).items():

1172

ann_tag = document.createElement("annotation")

1173

ann_tag.setAttribute("name", annotation)

1174

ann_tag.setAttribute("value", value)

1175

if_tag.appendChild(ann_tag)

1176

# Fix argument name for the Introspect method itself

1177

if (if_tag.getAttribute("name")

1178

== dbus.INTROSPECTABLE_IFACE):

1179

for cn in if_tag.getElementsByTagName("method"):

1180

if cn.getAttribute("name") == "Introspect":

1181

for arg in cn.getElementsByTagName("arg"):

1182

if (arg.getAttribute("direction")

1183

== "out"):

1184

arg.setAttribute("name",

1185

"xml_data")

1186

xmlstring = document.toxml("utf-8")

1187

document.unlink()

1188

except (AttributeError, xml.dom.DOMException,

1189

xml.parsers.expat.ExpatError) as error:

1190

logger.error("Failed to override Introspection method",

1191

exc_info=error)

1192

return xmlstring

1193

1194

1195

class DBusObjectWithProperties(DBusObjectWithAnnotations):

573

class DBusObjectWithProperties(dbus.service.Object):

1196

574

"""A D-Bus object with properties.

1197

575

1198

576

Classes inheriting from this can use the dbus_service_property

1199

577

decorator to expose methods as D-Bus properties. It exposes the

1200

578

standard Get(), Set(), and GetAll() methods on the D-Bus.

1201

579

"""

1202

580

581

@staticmethod

582

def _is_dbus_property(obj):

583

return getattr(obj, "_dbus_is_property", False)

584

585

def _get_all_dbus_properties(self):

586

"""Returns a generator of (name, attribute) pairs

587

"""

588

return ((prop._dbus_name, prop)

589

for name, prop in

590

inspect.getmembers(self, self._is_dbus_property))

591

1203

592

def _get_dbus_property(self, interface_name, property_name):

1204

593

"""Returns a bound method if one exists which is a D-Bus

1205

594

property with the specified name and interface.

1206

595

"""

1207

for cls in self.__class__.__mro__:

1208

for name, value in inspect.getmembers(

1209

cls, self._is_dbus_thing("property")):

1210

if (value._dbus_name == property_name

1211

and value._dbus_interface == interface_name):

1212

return value.__get__(self)

1213

596

for name in (property_name,

597

property_name + "_dbus_property"):

598

prop = getattr(self, name, None)

599

if (prop is None

600

or not self._is_dbus_property(prop)

601

or prop._dbus_name != property_name

602

or (interface_name and prop._dbus_interface

603

and interface_name != prop._dbus_interface)):

604

continue

605

return prop

1214

606

# No such property

1215

raise DBusPropertyNotFound("{}:{}.{}".format(

1216

self.dbus_object_path, interface_name, property_name))

1217

1218

@classmethod

1219

def _get_all_interface_names(cls):

1220

"""Get a sequence of all interfaces supported by an object"""

1221

return (name for name in set(getattr(getattr(x, attr),

1222

"_dbus_interface", None)

1223

for x in (inspect.getmro(cls))

1224

for attr in dir(x))

1225

if name is not None)

1226

1227

@dbus.service.method(dbus.PROPERTIES_IFACE,

1228

in_signature="ss",

607

raise DBusPropertyNotFound(self.dbus_object_path + ":"

608

+ interface_name + "."

609

+ property_name)

610

611

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",

1229

612

out_signature="v")

1230

613

def Get(self, interface_name, property_name):

1231

614

"""Standard D-Bus property Get() method, see D-Bus standard.

1249

632

# The byte_arrays option is not supported yet on

1250

633

# signatures other than "ay".

1251

634

if prop._dbus_signature != "ay":

1252

raise ValueError("Byte arrays not supported for non-"

1253

"'ay' signature {!r}"

1254

.format(prop._dbus_signature))

1255

value = dbus.ByteArray(b''.join(chr(byte)

1256

for byte in value))

635

raise ValueError

636

value = dbus.ByteArray(''.join(unichr(byte)

637

for byte in value))

1257

638

prop(value)

1258

639

1259

@dbus.service.method(dbus.PROPERTIES_IFACE,

1260

in_signature="s",

640

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",

1261

641

out_signature="a{sv}")

1262

642

def GetAll(self, interface_name):

1263

643

"""Standard D-Bus property GetAll() method, see D-Bus

1264

644

standard.

1265

645

1266

646

Note: Will not include properties with access="write".

1267

647

"""

1268

properties = {}

1269

for name, prop in self._get_all_dbus_things("property"):

648

all = {}

649

for name, prop in self._get_all_dbus_properties():

1270

650

if (interface_name

1271

651

and interface_name != prop._dbus_interface):

1272

652

# Interface non-empty but did not match

1276

656

continue

1277

657

value = prop()

1278

658

if not hasattr(value, "variant_level"):

1279

properties[name] = value

659

all[name] = value

1280

660

continue

1281

properties[name] = type(value)(

1282

value, variant_level = value.variant_level + 1)

1283

return dbus.Dictionary(properties, signature="sv")

1284

1285

@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")

1286

def PropertiesChanged(self, interface_name, changed_properties,

1287

invalidated_properties):

1288

"""Standard D-Bus PropertiesChanged() signal, see D-Bus

1289

standard.

1290

"""

1291

pass

661

all[name] = type(value)(value, variant_level=

662

value.variant_level+1)

663

return dbus.Dictionary(all, signature="sv")

1292

664

1293

665

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1294

666

out_signature="s",

1295

667

path_keyword='object_path',

1296

668

connection_keyword='connection')

1297

669

def Introspect(self, object_path, connection):

1298

"""Overloading of standard D-Bus method.

1299

1300

Inserts property tags and interface annotation tags.

670

"""Standard D-Bus method, overloaded to insert property tags.

1301

671

"""

1302

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1303

object_path,

1304

connection)

672

xmlstring = dbus.service.Object.Introspect(self, object_path,

673

connection)

1305

674

try:

1306

675

document = xml.dom.minidom.parseString(xmlstring)

1307

1308

676

def make_tag(document, name, prop):

1309

677

e = document.createElement("property")

1310

678

e.setAttribute("name", name)

1311

679

e.setAttribute("type", prop._dbus_signature)

1312

680

e.setAttribute("access", prop._dbus_access)

1313

681

return e

1314

1315

682

for if_tag in document.getElementsByTagName("interface"):

1316

# Add property tags

1317

683

for tag in (make_tag(document, name, prop)

1318

684

for name, prop

1319

in self._get_all_dbus_things("property")

685

in self._get_all_dbus_properties()

1320

686

if prop._dbus_interface

1321

687

== if_tag.getAttribute("name")):

1322

688

if_tag.appendChild(tag)

1323

# Add annotation tags for properties

1324

for tag in if_tag.getElementsByTagName("property"):

1325

annots = dict()

1326

for name, prop in self._get_all_dbus_things(

1327

"property"):

1328

if (name == tag.getAttribute("name")

1329

and prop._dbus_interface

1330

== if_tag.getAttribute("name")):

1331

annots.update(getattr(

1332

prop, "_dbus_annotations", {}))

1333

for name, value in annots.items():

1334

ann_tag = document.createElement(

1335

"annotation")

1336

ann_tag.setAttribute("name", name)

1337

ann_tag.setAttribute("value", value)

1338

tag.appendChild(ann_tag)

1339

689

# Add the names to the return values for the

1340

690

# "org.freedesktop.DBus.Properties" methods

1341

691

if (if_tag.getAttribute("name")

1354

704

xmlstring = document.toxml("utf-8")

1355

705

document.unlink()

1356

706

except (AttributeError, xml.dom.DOMException,

1357

xml.parsers.expat.ExpatError) as error:

1358

logger.error("Failed to override Introspection method",

1359

exc_info=error)

1360

return xmlstring

1361

1362

try:

1363

dbus.OBJECT_MANAGER_IFACE

1364

except AttributeError:

1365

dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"

1366

1367

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1368

"""A D-Bus object with an ObjectManager.

1369

1370

Classes inheriting from this exposes the standard

1371

GetManagedObjects call and the InterfacesAdded and

1372

InterfacesRemoved signals on the standard

1373

"org.freedesktop.DBus.ObjectManager" interface.

1374

1375

Note: No signals are sent automatically; they must be sent

1376

manually.

1377

"""

1378

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1379

out_signature = "a{oa{sa{sv}}}")

1380

def GetManagedObjects(self):

1381

"""This function must be overridden"""

1382

raise NotImplementedError()

1383

1384

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1385

signature = "oa{sa{sv}}")

1386

def InterfacesAdded(self, object_path, interfaces_and_properties):

1387

pass

1388

1389

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")

1390

def InterfacesRemoved(self, object_path, interfaces):

1391

pass

1392

1393

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1394

out_signature = "s",

1395

path_keyword = 'object_path',

1396

connection_keyword = 'connection')

1397

def Introspect(self, object_path, connection):

1398

"""Overloading of standard D-Bus method.

1399

1400

Override return argument name of GetManagedObjects to be

1401

"objpath_interfaces_and_properties"

1402

"""

1403

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1404

object_path,

1405

connection)

1406

try:

1407

document = xml.dom.minidom.parseString(xmlstring)

1408

1409

for if_tag in document.getElementsByTagName("interface"):

1410

# Fix argument name for the GetManagedObjects method

1411

if (if_tag.getAttribute("name")

1412

== dbus.OBJECT_MANAGER_IFACE):

1413

for cn in if_tag.getElementsByTagName("method"):

1414

if (cn.getAttribute("name")

1415

== "GetManagedObjects"):

1416

for arg in cn.getElementsByTagName("arg"):

1417

if (arg.getAttribute("direction")

1418

== "out"):

1419

arg.setAttribute(

1420

"name",

1421

"objpath_interfaces"

1422

"_and_properties")

1423

xmlstring = document.toxml("utf-8")

1424

document.unlink()

1425

except (AttributeError, xml.dom.DOMException,

1426

xml.parsers.expat.ExpatError) as error:

1427

logger.error("Failed to override Introspection method",

1428

exc_info = error)

1429

return xmlstring

1430

1431

def datetime_to_dbus(dt, variant_level=0):

1432

"""Convert a UTC datetime.datetime() to a D-Bus type."""

1433

if dt is None:

1434

return dbus.String("", variant_level = variant_level)

1435

return dbus.String(dt.isoformat(), variant_level=variant_level)

1436

1437

1438

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1439

"""A class decorator; applied to a subclass of

1440

dbus.service.Object, it will add alternate D-Bus attributes with

1441

interface names according to the "alt_interface_names" mapping.

1442

Usage:

1443

1444

@alternate_dbus_interfaces({"org.example.Interface":

1445

"net.example.AlternateInterface"})

1446

class SampleDBusObject(dbus.service.Object):

1447

@dbus.service.method("org.example.Interface")

1448

def SampleDBusMethod():

1449

pass

1450

1451

The above "SampleDBusMethod" on "SampleDBusObject" will be

1452

reachable via two interfaces: "org.example.Interface" and

1453

"net.example.AlternateInterface", the latter of which will have

1454

its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to

1455

"true", unless "deprecate" is passed with a False value.

1456

1457

This works for methods and signals, and also for D-Bus properties

1458

(from DBusObjectWithProperties) and interfaces (from the

1459

dbus_interface_annotations decorator).

1460

"""

1461

1462

def wrapper(cls):

1463

for orig_interface_name, alt_interface_name in (

1464

alt_interface_names.items()):

1465

attr = {}

1466

interface_names = set()

1467

# Go though all attributes of the class

1468

for attrname, attribute in inspect.getmembers(cls):

1469

# Ignore non-D-Bus attributes, and D-Bus attributes

1470

# with the wrong interface name

1471

if (not hasattr(attribute, "_dbus_interface")

1472

or not attribute._dbus_interface.startswith(

1473

orig_interface_name)):

1474

continue

1475

# Create an alternate D-Bus interface name based on

1476

# the current name

1477

alt_interface = attribute._dbus_interface.replace(

1478

orig_interface_name, alt_interface_name)

1479

interface_names.add(alt_interface)

1480

# Is this a D-Bus signal?

1481

if getattr(attribute, "_dbus_is_signal", False):

1482

if sys.version_info.major == 2:

1483

# Extract the original non-method undecorated

1484

# function by black magic

1485

nonmethod_func = (dict(

1486

zip(attribute.func_code.co_freevars,

1487

attribute.__closure__))

1488

["func"].cell_contents)

1489

else:

1490

nonmethod_func = attribute

1491

# Create a new, but exactly alike, function

1492

# object, and decorate it to be a new D-Bus signal

1493

# with the alternate D-Bus interface name

1494

if sys.version_info.major == 2:

1495

new_function = types.FunctionType(

1496

nonmethod_func.func_code,

1497

nonmethod_func.func_globals,

1498

nonmethod_func.func_name,

1499

nonmethod_func.func_defaults,

1500

nonmethod_func.func_closure)

1501

else:

1502

new_function = types.FunctionType(

1503

nonmethod_func.__code__,

1504

nonmethod_func.__globals__,

1505

nonmethod_func.__name__,

1506

nonmethod_func.__defaults__,

1507

nonmethod_func.__closure__)

1508

new_function = (dbus.service.signal(

1509

alt_interface,

1510

attribute._dbus_signature)(new_function))

1511

# Copy annotations, if any

1512

try:

1513

new_function._dbus_annotations = dict(

1514

attribute._dbus_annotations)

1515

except AttributeError:

1516

pass

1517

# Define a creator of a function to call both the

1518

# original and alternate functions, so both the

1519

# original and alternate signals gets sent when

1520

# the function is called

1521

def fixscope(func1, func2):

1522

"""This function is a scope container to pass

1523

func1 and func2 to the "call_both" function

1524

outside of its arguments"""

1525

1526

@functools.wraps(func2)

1527

def call_both(*args, **kwargs):

1528

"""This function will emit two D-Bus

1529

signals by calling func1 and func2"""

1530

func1(*args, **kwargs)

1531

func2(*args, **kwargs)

1532

# Make wrapper function look like a D-Bus signal

1533

for name, attr in inspect.getmembers(func2):

1534

if name.startswith("_dbus_"):

1535

setattr(call_both, name, attr)

1536

1537

return call_both

1538

# Create the "call_both" function and add it to

1539

# the class

1540

attr[attrname] = fixscope(attribute, new_function)

1541

# Is this a D-Bus method?

1542

elif getattr(attribute, "_dbus_is_method", False):

1543

# Create a new, but exactly alike, function

1544

# object. Decorate it to be a new D-Bus method

1545

# with the alternate D-Bus interface name. Add it

1546

# to the class.

1547

attr[attrname] = (

1548

dbus.service.method(

1549

alt_interface,

1550

attribute._dbus_in_signature,

1551

attribute._dbus_out_signature)

1552

(types.FunctionType(attribute.func_code,

1553

attribute.func_globals,

1554

attribute.func_name,

1555

attribute.func_defaults,

1556

attribute.func_closure)))

1557

# Copy annotations, if any

1558

try:

1559

attr[attrname]._dbus_annotations = dict(

1560

attribute._dbus_annotations)

1561

except AttributeError:

1562

pass

1563

# Is this a D-Bus property?

1564

elif getattr(attribute, "_dbus_is_property", False):

1565

# Create a new, but exactly alike, function

1566

# object, and decorate it to be a new D-Bus

1567

# property with the alternate D-Bus interface

1568

# name. Add it to the class.

1569

attr[attrname] = (dbus_service_property(

1570

alt_interface, attribute._dbus_signature,

1571

attribute._dbus_access,

1572

attribute._dbus_get_args_options

1573

["byte_arrays"])

1574

(types.FunctionType(

1575

attribute.func_code,

1576

attribute.func_globals,

1577

attribute.func_name,

1578

attribute.func_defaults,

1579

attribute.func_closure)))

1580

# Copy annotations, if any

1581

try:

1582

attr[attrname]._dbus_annotations = dict(

1583

attribute._dbus_annotations)

1584

except AttributeError:

1585

pass

1586

# Is this a D-Bus interface?

1587

elif getattr(attribute, "_dbus_is_interface", False):

1588

# Create a new, but exactly alike, function

1589

# object. Decorate it to be a new D-Bus interface

1590

# with the alternate D-Bus interface name. Add it

1591

# to the class.

1592

attr[attrname] = (

1593

dbus_interface_annotations(alt_interface)

1594

(types.FunctionType(attribute.func_code,

1595

attribute.func_globals,

1596

attribute.func_name,

1597

attribute.func_defaults,

1598

attribute.func_closure)))

1599

if deprecate:

1600

# Deprecate all alternate interfaces

1601

iname="_AlternateDBusNames_interface_annotation{}"

1602

for interface_name in interface_names:

1603

1604

@dbus_interface_annotations(interface_name)

1605

def func(self):

1606

return { "org.freedesktop.DBus.Deprecated":

1607

"true" }

1608

# Find an unused name

1609

for aname in (iname.format(i)

1610

for i in itertools.count()):

1611

if aname not in attr:

1612

attr[aname] = func

1613

break

1614

if interface_names:

1615

# Replace the class with a new subclass of it with

1616

# methods, signals, etc. as created above.

1617

cls = type(b"{}Alternate".format(cls.__name__),

1618

(cls, ), attr)

1619

return cls

1620

1621

return wrapper

1622

1623

1624

@alternate_dbus_interfaces({"se.recompile.Mandos":

1625

"se.bsnet.fukt.Mandos"})

707

xml.parsers.expat.ExpatError), error:

708

logger.error("Failed to override Introspection method",

709

error)

710

return xmlstring

711

712

1626

713

class ClientDBus(Client, DBusObjectWithProperties):

1627

714

"""A Client class using D-Bus

1628

715

1632

719

"""

1633

720

1634

721

runtime_expansions = (Client.runtime_expansions

1635

+ ("dbus_object_path", ))

1636

1637

_interface = "se.recompile.Mandos.Client"

722

+ ("dbus_object_path",))

1638

723

1639

724

# dbus.service.Object doesn't use super(), so we can't either.

1640

725

1641

726

def __init__(self, bus = None, *args, **kwargs):

727

self._approvals_pending = 0

1642

728

self.bus = bus

1643

729

Client.__init__(self, *args, **kwargs)

1644

730

# Only now, when this client is initialized, can it show up on

1645

731

# the D-Bus

1646

client_object_name = str(self.name).translate(

732

client_object_name = unicode(self.name).translate(

1647

733

{ord("."): ord("_"),

1648

734

ord("-"): ord("_")})

1649

self.dbus_object_path = dbus.ObjectPath(

1650

"/clients/" + client_object_name)

735

self.dbus_object_path = (dbus.ObjectPath

736

("/clients/" + client_object_name))

1651

737

DBusObjectWithProperties.__init__(self, self.bus,

1652

738

self.dbus_object_path)

1653

1654

def notifychangeproperty(transform_func, dbus_name,

1655

type_func=lambda x: x,

1656

variant_level=1,

1657

invalidate_only=False,

1658

_interface=_interface):

1659

""" Modify a variable so that it's a property which announces

1660

its changes to DBus.

1661

1662

transform_fun: Function that takes a value and a variant_level

1663

and transforms it to a D-Bus type.

1664

dbus_name: D-Bus name of the variable

1665

type_func: Function that transform the value before sending it

1666

to the D-Bus. Default: no transform

1667

variant_level: D-Bus variant level. Default: 1

1668

"""

1669

attrname = "_{}".format(dbus_name)

1670

1671

def setter(self, value):

1672

if hasattr(self, "dbus_object_path"):

1673

if (not hasattr(self, attrname) or

1674

type_func(getattr(self, attrname, None))

1675

!= type_func(value)):

1676

if invalidate_only:

1677

self.PropertiesChanged(

1678

_interface, dbus.Dictionary(),

1679

dbus.Array((dbus_name, )))

1680

else:

1681

dbus_value = transform_func(

1682

type_func(value),

1683

variant_level = variant_level)

1684

self.PropertyChanged(dbus.String(dbus_name),

1685

dbus_value)

1686

self.PropertiesChanged(

1687

_interface,

1688

dbus.Dictionary({ dbus.String(dbus_name):

1689

dbus_value }),

1690

dbus.Array())

1691

setattr(self, attrname, value)

1692

1693

return property(lambda self: getattr(self, attrname), setter)

1694

1695

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1696

approvals_pending = notifychangeproperty(dbus.Boolean,

1697

"ApprovalPending",

1698

type_func = bool)

1699

enabled = notifychangeproperty(dbus.Boolean, "Enabled")

1700

last_enabled = notifychangeproperty(datetime_to_dbus,

1701

"LastEnabled")

1702

checker = notifychangeproperty(

1703

dbus.Boolean, "CheckerRunning",

1704

type_func = lambda checker: checker is not None)

1705

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1706

"LastCheckedOK")

1707

last_checker_status = notifychangeproperty(dbus.Int16,

1708

"LastCheckerStatus")

1709

last_approval_request = notifychangeproperty(

1710

datetime_to_dbus, "LastApprovalRequest")

1711

approved_by_default = notifychangeproperty(dbus.Boolean,

1712

"ApprovedByDefault")

1713

approval_delay = notifychangeproperty(

1714

dbus.UInt64, "ApprovalDelay",

1715

type_func = lambda td: td.total_seconds() * 1000)

1716

approval_duration = notifychangeproperty(

1717

dbus.UInt64, "ApprovalDuration",

1718

type_func = lambda td: td.total_seconds() * 1000)

1719

host = notifychangeproperty(dbus.String, "Host")

1720

timeout = notifychangeproperty(

1721

dbus.UInt64, "Timeout",

1722

type_func = lambda td: td.total_seconds() * 1000)

1723

extended_timeout = notifychangeproperty(

1724

dbus.UInt64, "ExtendedTimeout",

1725

type_func = lambda td: td.total_seconds() * 1000)

1726

interval = notifychangeproperty(

1727

dbus.UInt64, "Interval",

1728

type_func = lambda td: td.total_seconds() * 1000)

1729

checker_command = notifychangeproperty(dbus.String, "Checker")

1730

secret = notifychangeproperty(dbus.ByteArray, "Secret",

1731

invalidate_only=True)

1732

1733

del notifychangeproperty

739

740

def _get_approvals_pending(self):

741

return self._approvals_pending

742

def _set_approvals_pending(self, value):

743

old_value = self._approvals_pending

744

self._approvals_pending = value

745

bval = bool(value)

746

if (hasattr(self, "dbus_object_path")

747

and bval is not bool(old_value)):

748

dbus_bool = dbus.Boolean(bval, variant_level=1)

749

self.PropertyChanged(dbus.String("ApprovalPending"),

750

dbus_bool)

751

752

approvals_pending = property(_get_approvals_pending,

753

_set_approvals_pending)

754

del _get_approvals_pending, _set_approvals_pending

755

756

@staticmethod

757

def _datetime_to_dbus(dt, variant_level=0):

758

"""Convert a UTC datetime.datetime() to a D-Bus type."""

759

return dbus.String(dt.isoformat(),

760

variant_level=variant_level)

761

762

def enable(self):

763

oldstate = getattr(self, "enabled", False)

764

r = Client.enable(self)

765

if oldstate != self.enabled:

766

# Emit D-Bus signals

767

self.PropertyChanged(dbus.String("Enabled"),

768

dbus.Boolean(True, variant_level=1))

769

self.PropertyChanged(

770

dbus.String("LastEnabled"),

771

self._datetime_to_dbus(self.last_enabled,

772

variant_level=1))

773

return r

774

775

def disable(self, quiet = False):

776

oldstate = getattr(self, "enabled", False)

777

r = Client.disable(self, quiet=quiet)

778

if not quiet and oldstate != self.enabled:

779

# Emit D-Bus signal

780

self.PropertyChanged(dbus.String("Enabled"),

781

dbus.Boolean(False, variant_level=1))

782

return r

1734

783

1735

784

def __del__(self, *args, **kwargs):

1736

785

try:

1741

790

DBusObjectWithProperties.__del__(self, *args, **kwargs)

1742

791

Client.__del__(self, *args, **kwargs)

1743

792

1744

def checker_callback(self, source, condition,

1745

connection, command, *args, **kwargs):

1746

ret = Client.checker_callback(self, source, condition,

1747

connection, command, *args,

1748

**kwargs)

1749

exitstatus = self.last_checker_status

1750

if exitstatus >= 0:

793

def checker_callback(self, pid, condition, command,

794

*args, **kwargs):

795

self.checker_callback_tag = None

796

self.checker = None

797

# Emit D-Bus signal

798

self.PropertyChanged(dbus.String("CheckerRunning"),

799

dbus.Boolean(False, variant_level=1))

800

if os.WIFEXITED(condition):

801

exitstatus = os.WEXITSTATUS(condition)

1751

802

# Emit D-Bus signal

1752

803

self.CheckerCompleted(dbus.Int16(exitstatus),

1753

# This is specific to GNU libC

1754

dbus.Int64(exitstatus << 8),

804

dbus.Int64(condition),

1755

805

dbus.String(command))

1756

806

else:

1757

807

# Emit D-Bus signal

1758

808

self.CheckerCompleted(dbus.Int16(-1),

1759

dbus.Int64(

1760

# This is specific to GNU libC

1761

(exitstatus << 8)

1762

| self.last_checker_signal),

809

dbus.Int64(condition),

1763

810

dbus.String(command))

1764

return ret

811

812

return Client.checker_callback(self, pid, condition, command,

813

*args, **kwargs)

814

815

def checked_ok(self, *args, **kwargs):

816

r = Client.checked_ok(self, *args, **kwargs)

817

# Emit D-Bus signal

818

self.PropertyChanged(

819

dbus.String("LastCheckedOK"),

820

(self._datetime_to_dbus(self.last_checked_ok,

821

variant_level=1)))

822

return r

823

824

def need_approval(self, *args, **kwargs):

825

r = Client.need_approval(self, *args, **kwargs)

826

# Emit D-Bus signal

827

self.PropertyChanged(

828

dbus.String("LastApprovalRequest"),

829

(self._datetime_to_dbus(self.last_approval_request,

830

variant_level=1)))

831

return r

1765

832

1766

833

def start_checker(self, *args, **kwargs):

1767

old_checker_pid = getattr(self.checker, "pid", None)

834

old_checker = self.checker

835

if self.checker is not None:

836

old_checker_pid = self.checker.pid

837

else:

838

old_checker_pid = None

1768

839

r = Client.start_checker(self, *args, **kwargs)

1769

840

# Only if new checker process was started

1770

841

if (self.checker is not None

1771

842

and old_checker_pid != self.checker.pid):

1772

843

# Emit D-Bus signal

1773

844

self.CheckerStarted(self.current_checker_command)

845

self.PropertyChanged(

846

dbus.String("CheckerRunning"),

847

dbus.Boolean(True, variant_level=1))

1774

848

return r

1775

849

850

def stop_checker(self, *args, **kwargs):

851

old_checker = getattr(self, "checker", None)

852

r = Client.stop_checker(self, *args, **kwargs)

853

if (old_checker is not None

854

and getattr(self, "checker", None) is None):

855

self.PropertyChanged(dbus.String("CheckerRunning"),

856

dbus.Boolean(False, variant_level=1))

857

return r

858

1776

859

def _reset_approved(self):

1777

self.approved = None

860

self._approved = None

1778

861

return False

1779

862

1780

863

def approve(self, value=True):

1781

self.approved = value

1782

gobject.timeout_add(int(self.approval_duration.total_seconds()

1783

* 1000), self._reset_approved)

1784

864

self.send_changedstate()

865

self._approved = value

866

gobject.timeout_add(self._timedelta_to_milliseconds

867

(self.approval_duration),

868

self._reset_approved)

869

1785

870

1786

871

## D-Bus methods, signals & properties

1787

1788

## Interfaces

872

_interface = "se.bsnet.fukt.Mandos.Client"

1789

873

1790

874

## Signals

1791

875

1802

886

pass

1803

887

1804

888

# PropertyChanged - signal

1805

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1806

889

@dbus.service.signal(_interface, signature="sv")

1807

890

def PropertyChanged(self, property, value):

1808

891

"D-Bus signal"

1839

922

# CheckedOK - method

1840

923

@dbus.service.method(_interface)

1841

924

def CheckedOK(self):

1842

self.checked_ok()

925

return self.checked_ok()

1843

926

1844

927

# Enable - method

1845

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1846

928

@dbus.service.method(_interface)

1847

929

def Enable(self):

1848

930

"D-Bus method"

1849

931

self.enable()

1850

932

1851

933

# StartChecker - method

1852

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1853

934

@dbus.service.method(_interface)

1854

935

def StartChecker(self):

1855

936

"D-Bus method"

1856

937

self.start_checker()

1857

938

1858

939

# Disable - method

1859

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1860

940

@dbus.service.method(_interface)

1861

941

def Disable(self):

1862

942

"D-Bus method"

1863

943

self.disable()

1864

944

1865

945

# StopChecker - method

1866

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1867

946

@dbus.service.method(_interface)

1868

947

def StopChecker(self):

1869

948

self.stop_checker()

1876

955

return dbus.Boolean(bool(self.approvals_pending))

1877

956

1878

957

# ApprovedByDefault - property

1879

@dbus_service_property(_interface,

1880

signature="b",

958

@dbus_service_property(_interface, signature="b",

1881

959

access="readwrite")

1882

960

def ApprovedByDefault_dbus_property(self, value=None):

1883

961

if value is None: # get

1884

962

return dbus.Boolean(self.approved_by_default)

1885

963

self.approved_by_default = bool(value)

964

# Emit D-Bus signal

965

self.PropertyChanged(dbus.String("ApprovedByDefault"),

966

dbus.Boolean(value, variant_level=1))

1886

967

1887

968

# ApprovalDelay - property

1888

@dbus_service_property(_interface,

1889

signature="t",

969

@dbus_service_property(_interface, signature="t",

1890

970

access="readwrite")

1891

971

def ApprovalDelay_dbus_property(self, value=None):

1892

972

if value is None: # get

1893

return dbus.UInt64(self.approval_delay.total_seconds()

1894

* 1000)

973

return dbus.UInt64(self.approval_delay_milliseconds())

1895

974

self.approval_delay = datetime.timedelta(0, 0, 0, value)

975

# Emit D-Bus signal

976

self.PropertyChanged(dbus.String("ApprovalDelay"),

977

dbus.UInt64(value, variant_level=1))

1896

978

1897

979

# ApprovalDuration - property

1898

@dbus_service_property(_interface,

1899

signature="t",

980

@dbus_service_property(_interface, signature="t",

1900

981

access="readwrite")

1901

982

def ApprovalDuration_dbus_property(self, value=None):

1902

983

if value is None: # get

1903

return dbus.UInt64(self.approval_duration.total_seconds()

1904

* 1000)

984

return dbus.UInt64(self._timedelta_to_milliseconds(

985

self.approval_duration))

1905

986

self.approval_duration = datetime.timedelta(0, 0, 0, value)

987

# Emit D-Bus signal

988

self.PropertyChanged(dbus.String("ApprovalDuration"),

989

dbus.UInt64(value, variant_level=1))

1906

990

1907

991

# Name - property

1908

@dbus_annotations(

1909

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1910

992

@dbus_service_property(_interface, signature="s", access="read")

1911

993

def Name_dbus_property(self):

1912

994

return dbus.String(self.name)

1913

995

1914

996

# Fingerprint - property

1915

@dbus_annotations(

1916

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1917

997

@dbus_service_property(_interface, signature="s", access="read")

1918

998

def Fingerprint_dbus_property(self):

1919

999

return dbus.String(self.fingerprint)

1920

1000

1921

1001

# Host - property

1922

@dbus_service_property(_interface,

1923

signature="s",

1002

@dbus_service_property(_interface, signature="s",

1924

1003

access="readwrite")

1925

1004

def Host_dbus_property(self, value=None):

1926

1005

if value is None: # get

1927

1006

return dbus.String(self.host)

1928

self.host = str(value)

1007

self.host = value

1008

# Emit D-Bus signal

1009

self.PropertyChanged(dbus.String("Host"),

1010

dbus.String(value, variant_level=1))

1929

1011

1930

1012

# Created - property

1931

@dbus_annotations(

1932

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1933

1013

@dbus_service_property(_interface, signature="s", access="read")

1934

1014

def Created_dbus_property(self):

1935

return datetime_to_dbus(self.created)

1015

return dbus.String(self._datetime_to_dbus(self.created))

1936

1016

1937

1017

# LastEnabled - property

1938

1018

@dbus_service_property(_interface, signature="s", access="read")

1939

1019

def LastEnabled_dbus_property(self):

1940

return datetime_to_dbus(self.last_enabled)

1020

if self.last_enabled is None:

1021

return dbus.String("")

1022

return dbus.String(self._datetime_to_dbus(self.last_enabled))

1941

1023

1942

1024

# Enabled - property

1943

@dbus_service_property(_interface,

1944

signature="b",

1025

@dbus_service_property(_interface, signature="b",

1945

1026

access="readwrite")

1946

1027

def Enabled_dbus_property(self, value=None):

1947

1028

if value is None: # get

1952

1033

self.disable()

1953

1034

1954

1035

# LastCheckedOK - property

1955

@dbus_service_property(_interface,

1956

signature="s",

1036

@dbus_service_property(_interface, signature="s",

1957

1037

access="readwrite")

1958

1038

def LastCheckedOK_dbus_property(self, value=None):

1959

1039

if value is not None:

1960

1040

self.checked_ok()

1961

1041

return

1962

return datetime_to_dbus(self.last_checked_ok)

1963

1964

# LastCheckerStatus - property

1965

@dbus_service_property(_interface, signature="n", access="read")

1966

def LastCheckerStatus_dbus_property(self):

1967

return dbus.Int16(self.last_checker_status)

1968

1969

# Expires - property

1970

@dbus_service_property(_interface, signature="s", access="read")

1971

def Expires_dbus_property(self):

1972

return datetime_to_dbus(self.expires)

1042

if self.last_checked_ok is None:

1043

return dbus.String("")

1044

return dbus.String(self._datetime_to_dbus(self

1045

.last_checked_ok))

1973

1046

1974

1047

# LastApprovalRequest - property

1975

1048

@dbus_service_property(_interface, signature="s", access="read")

1976

1049

def LastApprovalRequest_dbus_property(self):

1977

return datetime_to_dbus(self.last_approval_request)

1050

if self.last_approval_request is None:

1051

return dbus.String("")

1052

return dbus.String(self.

1053

_datetime_to_dbus(self

1054

.last_approval_request))

1978

1055

1979

1056

# Timeout - property

1980

@dbus_service_property(_interface,

1981

signature="t",

1057

@dbus_service_property(_interface, signature="t",

1982

1058

access="readwrite")

1983

1059

def Timeout_dbus_property(self, value=None):

1984

1060

if value is None: # get

1985

return dbus.UInt64(self.timeout.total_seconds() * 1000)

1986

old_timeout = self.timeout

1061

return dbus.UInt64(self.timeout_milliseconds())

1987

1062

self.timeout = datetime.timedelta(0, 0, 0, value)

1988

# Reschedule disabling

1989

if self.enabled:

1990

now = datetime.datetime.utcnow()

1991

self.expires += self.timeout - old_timeout

1992

if self.expires <= now:

1993

# The timeout has passed

1994

self.disable()

1995

else:

1996

if (getattr(self, "disable_initiator_tag", None)

1997

is None):

1998

return

1999

gobject.source_remove(self.disable_initiator_tag)

2000

self.disable_initiator_tag = gobject.timeout_add(

2001

int((self.expires - now).total_seconds() * 1000),

2002

self.disable)

2003

2004

# ExtendedTimeout - property

2005

@dbus_service_property(_interface,

2006

signature="t",

2007

access="readwrite")

2008

def ExtendedTimeout_dbus_property(self, value=None):

2009

if value is None: # get

2010

return dbus.UInt64(self.extended_timeout.total_seconds()

2011

* 1000)

2012

self.extended_timeout = datetime.timedelta(0, 0, 0, value)

1063

# Emit D-Bus signal

1064

self.PropertyChanged(dbus.String("Timeout"),

1065

dbus.UInt64(value, variant_level=1))

1066

if getattr(self, "disable_initiator_tag", None) is None:

1067

return

1068

# Reschedule timeout

1069

gobject.source_remove(self.disable_initiator_tag)

1070

self.disable_initiator_tag = None

1071

time_to_die = (self.

1072

_timedelta_to_milliseconds((self

1073

.last_checked_ok

1074

+ self.timeout)

1075

- datetime.datetime

1076

.utcnow()))

1077

if time_to_die <= 0:

1078

# The timeout has passed

1079

self.disable()

1080

else:

1081

self.disable_initiator_tag = (gobject.timeout_add

1082

(time_to_die, self.disable))

2013

1083

2014

1084

# Interval - property

2015

@dbus_service_property(_interface,

2016

signature="t",

1085

@dbus_service_property(_interface, signature="t",

2017

1086

access="readwrite")

2018

1087

def Interval_dbus_property(self, value=None):

2019

1088

if value is None: # get

2020

return dbus.UInt64(self.interval.total_seconds() * 1000)

1089

return dbus.UInt64(self.interval_milliseconds())

2021

1090

self.interval = datetime.timedelta(0, 0, 0, value)

1091

# Emit D-Bus signal

1092

self.PropertyChanged(dbus.String("Interval"),

1093

dbus.UInt64(value, variant_level=1))

2022

1094

if getattr(self, "checker_initiator_tag", None) is None:

2023

1095

return

2024

if self.enabled:

2025

# Reschedule checker run

2026

gobject.source_remove(self.checker_initiator_tag)

2027

self.checker_initiator_tag = gobject.timeout_add(

2028

value, self.start_checker)

2029

self.start_checker() # Start one now, too

2030

1096

# Reschedule checker run

1097

gobject.source_remove(self.checker_initiator_tag)

1098

self.checker_initiator_tag = (gobject.timeout_add

1099

(value, self.start_checker))

1100

self.start_checker() # Start one now, too

1101

2031

1102

# Checker - property

2032

@dbus_service_property(_interface,

2033

signature="s",

1103

@dbus_service_property(_interface, signature="s",

2034

1104

access="readwrite")

2035

1105

def Checker_dbus_property(self, value=None):

2036

1106

if value is None: # get

2037

1107

return dbus.String(self.checker_command)

2038

self.checker_command = str(value)

1108

self.checker_command = value

1109

# Emit D-Bus signal

1110

self.PropertyChanged(dbus.String("Checker"),

1111

dbus.String(self.checker_command,

1112

variant_level=1))

2039

1113

2040

1114

# CheckerRunning - property

2041

@dbus_service_property(_interface,

2042

signature="b",

1115

@dbus_service_property(_interface, signature="b",

2043

1116

access="readwrite")

2044

1117

def CheckerRunning_dbus_property(self, value=None):

2045

1118

if value is None: # get

2050

1123

self.stop_checker()

2051

1124

2052

1125

# ObjectPath - property

2053

@dbus_annotations(

2054

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",

2055

"org.freedesktop.DBus.Deprecated": "true"})

2056

1126

@dbus_service_property(_interface, signature="o", access="read")

2057

1127

def ObjectPath_dbus_property(self):

2058

1128

return self.dbus_object_path # is already a dbus.ObjectPath

2059

1129

2060

1130

# Secret = property

2061

@dbus_annotations(

2062

{"org.freedesktop.DBus.Property.EmitsChangedSignal":

2063

"invalidates"})

2064

@dbus_service_property(_interface,

2065

signature="ay",

2066

access="write",

2067

byte_arrays=True)

1131

@dbus_service_property(_interface, signature="ay",

1132

access="write", byte_arrays=True)

2068

1133

def Secret_dbus_property(self, value):

2069

self.secret = bytes(value)

1134

self.secret = str(value)

2070

1135

2071

1136

del _interface

2072

1137

2076

1141

self._pipe = child_pipe

2077

1142

self._pipe.send(('init', fpr, address))

2078

1143

if not self._pipe.recv():

2079

raise KeyError(fpr)

2080

1144

raise KeyError()

1145

2081

1146

def __getattribute__(self, name):

2082

if name == '_pipe':

1147

if(name == '_pipe'):

2083

1148

return super(ProxyClient, self).__getattribute__(name)

2084

1149

self._pipe.send(('getattr', name))

2085

1150

data = self._pipe.recv()

2086

1151

if data[0] == 'data':

2087

1152

return data[1]

2088

1153

if data[0] == 'function':

2089

2090

1154

def func(*args, **kwargs):

2091

1155

self._pipe.send(('funcall', name, args, kwargs))

2092

1156

return self._pipe.recv()[1]

2093

2094

1157

return func

2095

1158

2096

1159

def __setattr__(self, name, value):

2097

if name == '_pipe':

1160

if(name == '_pipe'):

2098

1161

return super(ProxyClient, self).__setattr__(name, value)

2099

1162

self._pipe.send(('setattr', name, value))

2100

1163

2108

1171

def handle(self):

2109

1172

with contextlib.closing(self.server.child_pipe) as child_pipe:

2110

1173

logger.info("TCP connection from: %s",

2111

str(self.client_address))

1174

unicode(self.client_address))

2112

1175

logger.debug("Pipe FD: %d",

2113

1176

self.server.child_pipe.fileno())

2114

2115

session = gnutls.ClientSession(self.request)

2116

1177

1178

session = (gnutls.connection

1179

.ClientSession(self.request,

1180

gnutls.connection

1181

.X509Credentials()))

1182

1183

# Note: gnutls.connection.X509Credentials is really a

1184

# generic GnuTLS certificate credentials object so long as

1185

# no X.509 keys are added to it. Therefore, we can use it

1186

# here despite using OpenPGP certificates.

1187

2117

1188

#priority = ':'.join(("NONE", "+VERS-TLS1.1",

2118

1189

# "+AES-256-CBC", "+SHA1",

2119

1190

# "+COMP-NULL", "+CTYPE-OPENPGP",

2122

1193

priority = self.server.gnutls_priority

2123

1194

if priority is None:

2124

1195

priority = "NORMAL"

2125

gnutls.priority_set_direct(session._c_object, priority,

2126

None)

2127

1196

(gnutls.library.functions

1197

.gnutls_priority_set_direct(session._c_object,

1198

priority, None))

1199

2128

1200

# Start communication using the Mandos protocol

2129

1201

# Get protocol number

2130

1202

line = self.request.makefile().readline()

2131

1203

logger.debug("Protocol version: %r", line)

2132

1204

try:

2133

1205

if int(line.strip().split()[0]) > 1:

2134

raise RuntimeError(line)

2135

except (ValueError, IndexError, RuntimeError) as error:

1206

raise RuntimeError

1207

except (ValueError, IndexError, RuntimeError), error:

2136

1208

logger.error("Unknown protocol version: %s", error)

2137

1209

return

2138

1210

2139

1211

# Start GnuTLS connection

2140

1212

try:

2141

1213

session.handshake()

2142

except gnutls.Error as error:

1214

except gnutls.errors.GNUTLSError, error:

2143

1215

logger.warning("Handshake failed: %s", error)

2144

1216

# Do not run session.bye() here: the session is not

2145

1217

# established. Just abandon the request.

2146

1218

return

2147

1219

logger.debug("Handshake succeeded")

2148

1220

2149

1221

approval_required = False

2150

1222

try:

2151

1223

try:

2152

fpr = self.fingerprint(

2153

self.peer_certificate(session))

2154

except (TypeError, gnutls.Error) as error:

1224

fpr = self.fingerprint(self.peer_certificate

1225

(session))

1226

except (TypeError, gnutls.errors.GNUTLSError), error:

2155

1227

logger.warning("Bad certificate: %s", error)

2156

1228

return

2157

1229

logger.debug("Fingerprint: %s", fpr)

2158

1230

2159

1231

try:

2160

1232

client = ProxyClient(child_pipe, fpr,

2161

1233

self.client_address)

2169

1241

2170

1242

while True:

2171

1243

if not client.enabled:

2172

logger.info("Client %s is disabled",

2173

client.name)

1244

logger.warning("Client %s is disabled",

1245

client.name)

2174

1246

if self.server.use_dbus:

2175

1247

# Emit D-Bus signal

2176

client.Rejected("Disabled")

1248

client.Rejected("Disabled")

2177

1249

return

2178

1250

2179

if client.approved or not client.approval_delay:

1251

if client._approved or not client.approval_delay:

2180

1252

#We are approved or approval is disabled

2181

1253

break

2182

elif client.approved is None:

1254

elif client._approved is None:

2183

1255

logger.info("Client %s needs approval",

2184

1256

client.name)

2185

1257

if self.server.use_dbus:

2186

1258

# Emit D-Bus signal

2187

1259

client.NeedApproval(

2188

client.approval_delay.total_seconds()

2189

* 1000, client.approved_by_default)

1260

client.approval_delay_milliseconds(),

1261

client.approved_by_default)

2190

1262

else:

2191

1263

logger.warning("Client %s was not approved",

2192

1264

client.name)

2196

1268

return

2197

1269

2198

1270

#wait until timeout or approved

1271

#x = float(client._timedelta_to_milliseconds(delay))

2199

1272

time = datetime.datetime.now()

2200

1273

client.changedstate.acquire()

2201

client.changedstate.wait(delay.total_seconds())

1274

client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))

2202

1275

client.changedstate.release()

2203

1276

time2 = datetime.datetime.now()

2204

1277

if (time2 - time) >= delay:

2219

1292

while sent_size < len(client.secret):

2220

1293

try:

2221

1294

sent = session.send(client.secret[sent_size:])

2222

except gnutls.Error as error:

2223

logger.warning("gnutls send failed",

2224

exc_info=error)

1295

except (gnutls.errors.GNUTLSError), error:

1296

logger.warning("gnutls send failed")

2225

1297

return

2226

logger.debug("Sent: %d, remaining: %d", sent,

2227

len(client.secret) - (sent_size

2228

+ sent))

1298

logger.debug("Sent: %d, remaining: %d",

1299

sent, len(client.secret)

1300

- (sent_size + sent))

2229

1301

sent_size += sent

2230

1302

2231

1303

logger.info("Sending secret to %s", client.name)

2232

# bump the timeout using extended_timeout

2233

client.bump_timeout(client.extended_timeout)

1304

# bump the timeout as if seen

1305

client.checked_ok()

2234

1306

if self.server.use_dbus:

2235

1307

# Emit D-Bus signal

2236

1308

client.GotSecret()

2240

1312

client.approvals_pending -= 1

2241

1313

try:

2242

1314

session.bye()

2243

except gnutls.Error as error:

2244

logger.warning("GnuTLS bye failed",

2245

exc_info=error)

1315

except (gnutls.errors.GNUTLSError), error:

1316

logger.warning("GnuTLS bye failed")

2246

1317

2247

1318

@staticmethod

2248

1319

def peer_certificate(session):

2249

1320

"Return the peer's OpenPGP certificate as a bytestring"

2250

1321

# If not an OpenPGP certificate...

2251

if (gnutls.certificate_type_get(session._c_object)

2252

!= gnutls.CRT_OPENPGP):

2253

# ...return invalid data

2254

return b""

1322

if (gnutls.library.functions

1323

.gnutls_certificate_type_get(session._c_object)

1324

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1325

# ...do the normal thing

1326

return session.peer_certificate

2255

1327

list_size = ctypes.c_uint(1)

2256

cert_list = (gnutls.certificate_get_peers

1328

cert_list = (gnutls.library.functions

1329

.gnutls_certificate_get_peers

2257

1330

(session._c_object, ctypes.byref(list_size)))

2258

1331

if not bool(cert_list) and list_size.value != 0:

2259

raise gnutls.Error("error getting peer certificate")

1332

raise gnutls.errors.GNUTLSError("error getting peer"

1333

" certificate")

2260

1334

if list_size.value == 0:

2261

1335

return None

2262

1336

cert = cert_list[0]

2266

1340

def fingerprint(openpgp):

2267

1341

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2268

1342

# New GnuTLS "datum" with the OpenPGP public key

2269

datum = gnutls.datum_t(

2270

ctypes.cast(ctypes.c_char_p(openpgp),

2271

ctypes.POINTER(ctypes.c_ubyte)),

2272

ctypes.c_uint(len(openpgp)))

1343

datum = (gnutls.library.types

1344

.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),

1345

ctypes.POINTER

1346

(ctypes.c_ubyte)),

1347

ctypes.c_uint(len(openpgp))))

2273

1348

# New empty GnuTLS certificate

2274

crt = gnutls.openpgp_crt_t()

2275

gnutls.openpgp_crt_init(ctypes.byref(crt))

1349

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1350

(gnutls.library.functions

1351

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2276

1352

# Import the OpenPGP public key into the certificate

2277

gnutls.openpgp_crt_import(crt, ctypes.byref(datum),

2278

gnutls.OPENPGP_FMT_RAW)

1353

(gnutls.library.functions

1354

.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),

1355

gnutls.library.constants

1356

.GNUTLS_OPENPGP_FMT_RAW))

2279

1357

# Verify the self signature in the key

2280

1358

crtverify = ctypes.c_uint()

2281

gnutls.openpgp_crt_verify_self(crt, 0,

2282

ctypes.byref(crtverify))

1359

(gnutls.library.functions

1360

.gnutls_openpgp_crt_verify_self(crt, 0,

1361

ctypes.byref(crtverify)))

2283

1362

if crtverify.value != 0:

2284

gnutls.openpgp_crt_deinit(crt)

2285

raise gnutls.CertificateSecurityError("Verify failed")

1363

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1364

raise (gnutls.errors.CertificateSecurityError

1365

("Verify failed"))

2286

1366

# New buffer for the fingerprint

2287

1367

buf = ctypes.create_string_buffer(20)

2288

1368

buf_len = ctypes.c_size_t()

2289

1369

# Get the fingerprint from the certificate into the buffer

2290

gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),

2291

ctypes.byref(buf_len))

1370

(gnutls.library.functions

1371

.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),

1372

ctypes.byref(buf_len)))

2292

1373

# Deinit the certificate

2293

gnutls.openpgp_crt_deinit(crt)

1374

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2294

1375

# Convert the buffer to a Python bytestring

2295

1376

fpr = ctypes.string_at(buf, buf_len.value)

2296

1377

# Convert the bytestring to hexadecimal notation

2297

hex_fpr = binascii.hexlify(fpr).upper()

1378

hex_fpr = ''.join("%02X" % ord(char) for char in fpr)

2298

1379

return hex_fpr

2299

1380

2300

1381

2301

1382

class MultiprocessingMixIn(object):

2302

1383

"""Like socketserver.ThreadingMixIn, but with multiprocessing"""

2303

2304

1384

def sub_process_main(self, request, address):

2305

1385

try:

2306

1386

self.finish_request(request, address)

2307

except Exception:

1387

except:

2308

1388

self.handle_error(request, address)

2309

1389

self.close_request(request)

2310

1390

2311

1391

def process_request(self, request, address):

2312

1392

"""Start a new process to process the request."""

2313

proc = multiprocessing.Process(target = self.sub_process_main,

2314

args = (request, address))

2315

proc.start()

2316

return proc

2317

1393

multiprocessing.Process(target = self.sub_process_main,

1394

args = (request, address)).start()

2318

1395

2319

1396

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2320

1397

""" adds a pipe to the MixIn """

2321

2322

1398

def process_request(self, request, client_address):

2323

1399

"""Overrides and wraps the original process_request().

2324

1400

2325

1401

This function creates a new pipe in self.pipe

2326

1402

"""

2327

1403

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2328

2329

proc = MultiprocessingMixIn.process_request(self, request,

2330

client_address)

1404

1405

super(MultiprocessingMixInWithPipe,

1406

self).process_request(request, client_address)

2331

1407

self.child_pipe.close()

2332

self.add_pipe(parent_pipe, proc)

2333

2334

def add_pipe(self, parent_pipe, proc):

1408

self.add_pipe(parent_pipe)

1409

1410

def add_pipe(self, parent_pipe):

2335

1411

"""Dummy function; override as necessary"""

2336

raise NotImplementedError()

2337

1412

raise NotImplementedError

2338

1413

2339

1414

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2340

1415

socketserver.TCPServer, object):

2345

1420

interface: None or a network interface name (string)

2346

1421

use_ipv6: Boolean; to use IPv6 or not

2347

1422

"""

2348

2349

1423

def __init__(self, server_address, RequestHandlerClass,

2350

interface=None,

2351

use_ipv6=True,

2352

socketfd=None):

2353

"""If socketfd is set, use that file descriptor instead of

2354

creating a new one with socket.socket().

2355

"""

1424

interface=None, use_ipv6=True):

2356

1425

self.interface = interface

2357

1426

if use_ipv6:

2358

1427

self.address_family = socket.AF_INET6

2359

if socketfd is not None:

2360

# Save the file descriptor

2361

self.socketfd = socketfd

2362

# Save the original socket.socket() function

2363

self.socket_socket = socket.socket

2364

# To implement --socket, we monkey patch socket.socket.

2365

#

2366

# (When socketserver.TCPServer is a new-style class, we

2367

# could make self.socket into a property instead of monkey

2368

# patching socket.socket.)

2369

#

2370

# Create a one-time-only replacement for socket.socket()

2371

@functools.wraps(socket.socket)

2372

def socket_wrapper(*args, **kwargs):

2373

# Restore original function so subsequent calls are

2374

# not affected.

2375

socket.socket = self.socket_socket

2376

del self.socket_socket

2377

# This time only, return a new socket object from the

2378

# saved file descriptor.

2379

return socket.fromfd(self.socketfd, *args, **kwargs)

2380

# Replace socket.socket() function with wrapper

2381

socket.socket = socket_wrapper

2382

# The socketserver.TCPServer.__init__ will call

2383

# socket.socket(), which might be our replacement,

2384

# socket_wrapper(), if socketfd was set.

2385

1428

socketserver.TCPServer.__init__(self, server_address,

2386

1429

RequestHandlerClass)

2387

2388

1430

def server_bind(self):

2389

1431

"""This overrides the normal server_bind() function

2390

1432

to bind to an interface if one was specified, and also NOT to

2396

1438

self.interface)

2397

1439

else:

2398

1440

try:

2399

self.socket.setsockopt(

2400

socket.SOL_SOCKET, SO_BINDTODEVICE,

2401

(self.interface + "\0").encode("utf-8"))

2402

except socket.error as error:

2403

if error.errno == errno.EPERM:

2404

logger.error("No permission to bind to"

2405

" interface %s", self.interface)

2406

elif error.errno == errno.ENOPROTOOPT:

1441

self.socket.setsockopt(socket.SOL_SOCKET,

1442

SO_BINDTODEVICE,

1443

str(self.interface

1444

+ '\0'))

1445

except socket.error, error:

1446

if error[0] == errno.EPERM:

1447

logger.error("No permission to"

1448

" bind to interface %s",

1449

self.interface)

1450

elif error[0] == errno.ENOPROTOOPT:

2407

1451

logger.error("SO_BINDTODEVICE not available;"

2408

1452

" cannot bind to interface %s",

2409

1453

self.interface)

2410

elif error.errno == errno.ENODEV:

2411

logger.error("Interface %s does not exist,"

2412

" cannot bind", self.interface)

2413

1454

else:

2414

1455

raise

2415

1456

# Only bind(2) the socket if we really need to.

2418

1459

if self.address_family == socket.AF_INET6:

2419

1460

any_address = "::" # in6addr_any

2420

1461

else:

2421

any_address = "0.0.0.0" # INADDR_ANY

1462

any_address = socket.INADDR_ANY

2422

1463

self.server_address = (any_address,

2423

1464

self.server_address[1])

2424

1465

elif not self.server_address[1]:

2425

self.server_address = (self.server_address[0], 0)

1466

self.server_address = (self.server_address[0],

1467

0)

2426

1468

# if self.interface:

2427

1469

# self.server_address = (self.server_address[0],

2428

1470

# 0, # port

2442

1484

2443

1485

Assumes a gobject.MainLoop event loop.

2444

1486

"""

2445

2446

1487

def __init__(self, server_address, RequestHandlerClass,

2447

interface=None,

2448

use_ipv6=True,

2449

clients=None,

2450

gnutls_priority=None,

2451

use_dbus=True,

2452

socketfd=None):

1488

interface=None, use_ipv6=True, clients=None,

1489

gnutls_priority=None, use_dbus=True):

2453

1490

self.enabled = False

2454

1491

self.clients = clients

2455

1492

if self.clients is None:

2456

self.clients = {}

1493

self.clients = set()

2457

1494

self.use_dbus = use_dbus

2458

1495

self.gnutls_priority = gnutls_priority

2459

1496

IPv6_TCPServer.__init__(self, server_address,

2460

1497

RequestHandlerClass,

2461

1498

interface = interface,

2462

use_ipv6 = use_ipv6,

2463

socketfd = socketfd)

2464

1499

use_ipv6 = use_ipv6)

2465

1500

def server_activate(self):

2466

1501

if self.enabled:

2467

1502

return socketserver.TCPServer.server_activate(self)

2468

2469

1503

def enable(self):

2470

1504

self.enabled = True

2471

2472

def add_pipe(self, parent_pipe, proc):

1505

def add_pipe(self, parent_pipe):

2473

1506

# Call "handle_ipc" for both data and EOF events

2474

gobject.io_add_watch(

2475

parent_pipe.fileno(),

2476

gobject.IO_IN | gobject.IO_HUP,

2477

functools.partial(self.handle_ipc,

2478

parent_pipe = parent_pipe,

2479

proc = proc))

2480

2481

def handle_ipc(self, source, condition,

2482

parent_pipe=None,

2483

proc = None,

1507

gobject.io_add_watch(parent_pipe.fileno(),

1508

gobject.IO_IN | gobject.IO_HUP,

1509

functools.partial(self.handle_ipc,

1510

parent_pipe = parent_pipe))

1511

1512

def handle_ipc(self, source, condition, parent_pipe=None,

2484

1513

client_object=None):

2485

# error, or the other end of multiprocessing.Pipe has closed

2486

if condition & (gobject.IO_ERR | gobject.IO_HUP):

2487

# Wait for other process to exit

2488

proc.join()

1514

condition_names = {

1515

gobject.IO_IN: "IN", # There is data to read.

1516

gobject.IO_OUT: "OUT", # Data can be written (without

1517

# blocking).

1518

gobject.IO_PRI: "PRI", # There is urgent data to read.

1519

gobject.IO_ERR: "ERR", # Error condition.

1520

gobject.IO_HUP: "HUP" # Hung up (the connection has been

1521

# broken, usually for pipes and

1522

# sockets).

1523

}

1524

conditions_string = ' | '.join(name

1525

for cond, name in

1526

condition_names.iteritems()

1527

if cond & condition)

1528

# error or the other end of multiprocessing.Pipe has closed

1529

if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):

2489

1530

return False

2490

1531

2491

1532

# Read a request from the child

2496

1537

fpr = request[1]

2497

1538

address = request[2]

2498

1539

2499

for c in self.clients.itervalues():

1540

for c in self.clients:

2500

1541

if c.fingerprint == fpr:

2501

1542

client = c

2502

1543

break

2503

1544

else:

2504

logger.info("Client not found for fingerprint: %s, ad"

2505

"dress: %s", fpr, address)

1545

logger.warning("Client not found for fingerprint: %s, ad"

1546

"dress: %s", fpr, address)

2506

1547

if self.use_dbus:

2507

1548

# Emit D-Bus signal

2508

mandos_dbus_service.ClientNotFound(fpr,

2509

address[0])

1549

mandos_dbus_service.ClientNotFound(fpr, address[0])

2510

1550

parent_pipe.send(False)

2511

1551

return False

2512

1552

2513

gobject.io_add_watch(

2514

parent_pipe.fileno(),

2515

gobject.IO_IN | gobject.IO_HUP,

2516

functools.partial(self.handle_ipc,

2517

parent_pipe = parent_pipe,

2518

proc = proc,

2519

client_object = client))

1553

gobject.io_add_watch(parent_pipe.fileno(),

1554

gobject.IO_IN | gobject.IO_HUP,

1555

functools.partial(self.handle_ipc,

1556

parent_pipe = parent_pipe,

1557

client_object = client))

2520

1558

parent_pipe.send(True)

2521

# remove the old hook in favor of the new above hook on

2522

# same fileno

1559

# remove the old hook in favor of the new above hook on same fileno

2523

1560

return False

2524

1561

if command == 'funcall':

2525

1562

funcname = request[1]

2526

1563

args = request[2]

2527

1564

kwargs = request[3]

2528

1565

2529

parent_pipe.send(('data', getattr(client_object,

2530

funcname)(*args,

2531

**kwargs)))

2532

1566

parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))

1567

2533

1568

if command == 'getattr':

2534

1569

attrname = request[1]

2535

if isinstance(client_object.__getattribute__(attrname),

2536

collections.Callable):

2537

parent_pipe.send(('function', ))

1570

if callable(client_object.__getattribute__(attrname)):

1571

parent_pipe.send(('function',))

2538

1572

else:

2539

parent_pipe.send((

2540

'data', client_object.__getattribute__(attrname)))

1573

parent_pipe.send(('data', client_object.__getattribute__(attrname)))

2541

1574

2542

1575

if command == 'setattr':

2543

1576

attrname = request[1]

2544

1577

value = request[2]

2545

1578

setattr(client_object, attrname, value)

2546

1579

2547

1580

return True

2548

1581

2549

1582

2550

def rfc3339_duration_to_delta(duration):

2551

"""Parse an RFC 3339 "duration" and return a datetime.timedelta

2552

2553

>>> rfc3339_duration_to_delta("P7D")

2554

datetime.timedelta(7)

2555

>>> rfc3339_duration_to_delta("PT60S")

2556

datetime.timedelta(0, 60)

2557

>>> rfc3339_duration_to_delta("PT60M")

2558

datetime.timedelta(0, 3600)

2559

>>> rfc3339_duration_to_delta("PT24H")

2560

datetime.timedelta(1)

2561

>>> rfc3339_duration_to_delta("P1W")

2562

datetime.timedelta(7)

2563

>>> rfc3339_duration_to_delta("PT5M30S")

2564

datetime.timedelta(0, 330)

2565

>>> rfc3339_duration_to_delta("P1DT3M20S")

2566

datetime.timedelta(1, 200)

2567

"""

2568

2569

# Parsing an RFC 3339 duration with regular expressions is not

2570

# possible - there would have to be multiple places for the same

2571

# values, like seconds. The current code, while more esoteric, is

2572

# cleaner without depending on a parsing library. If Python had a

2573

# built-in library for parsing we would use it, but we'd like to

2574

# avoid excessive use of external libraries.

2575

2576

# New type for defining tokens, syntax, and semantics all-in-one

2577

Token = collections.namedtuple("Token", (

2578

"regexp", # To match token; if "value" is not None, must have

2579

# a "group" containing digits

2580

"value", # datetime.timedelta or None

2581

"followers")) # Tokens valid after this token

2582

# RFC 3339 "duration" tokens, syntax, and semantics; taken from

2583

# the "duration" ABNF definition in RFC 3339, Appendix A.

2584

token_end = Token(re.compile(r"$"), None, frozenset())

2585

token_second = Token(re.compile(r"(\d+)S"),

2586

datetime.timedelta(seconds=1),

2587

frozenset((token_end, )))

2588

token_minute = Token(re.compile(r"(\d+)M"),

2589

datetime.timedelta(minutes=1),

2590

frozenset((token_second, token_end)))

2591

token_hour = Token(re.compile(r"(\d+)H"),

2592

datetime.timedelta(hours=1),

2593

frozenset((token_minute, token_end)))

2594

token_time = Token(re.compile(r"T"),

2595

None,

2596

frozenset((token_hour, token_minute,

2597

token_second)))

2598

token_day = Token(re.compile(r"(\d+)D"),

2599

datetime.timedelta(days=1),

2600

frozenset((token_time, token_end)))

2601

token_month = Token(re.compile(r"(\d+)M"),

2602

datetime.timedelta(weeks=4),

2603

frozenset((token_day, token_end)))

2604

token_year = Token(re.compile(r"(\d+)Y"),

2605

datetime.timedelta(weeks=52),

2606

frozenset((token_month, token_end)))

2607

token_week = Token(re.compile(r"(\d+)W"),

2608

datetime.timedelta(weeks=1),

2609

frozenset((token_end, )))

2610

token_duration = Token(re.compile(r"P"), None,

2611

frozenset((token_year, token_month,

2612

token_day, token_time,

2613

token_week)))

2614

# Define starting values

2615

value = datetime.timedelta() # Value so far

2616

found_token = None

2617

followers = frozenset((token_duration, )) # Following valid tokens

2618

s = duration # String left to parse

2619

# Loop until end token is found

2620

while found_token is not token_end:

2621

# Search for any currently valid tokens

2622

for token in followers:

2623

match = token.regexp.match(s)

2624

if match is not None:

2625

# Token found

2626

if token.value is not None:

2627

# Value found, parse digits

2628

factor = int(match.group(1), 10)

2629

# Add to value so far

2630

value += factor * token.value

2631

# Strip token from string

2632

s = token.regexp.sub("", s, 1)

2633

# Go to found token

2634

found_token = token

2635

# Set valid next tokens

2636

followers = found_token.followers

2637

break

2638

else:

2639

# No currently valid tokens were found

2640

raise ValueError("Invalid RFC 3339 duration: {!r}"

2641

.format(duration))

2642

# End token found

2643

return value

2644

2645

2646

1583

def string_to_delta(interval):

2647

1584

"""Parse a string and return a datetime.timedelta

2648

1585

2659

1596

>>> string_to_delta('5m 30s')

2660

1597

datetime.timedelta(0, 330)

2661

1598

"""

2662

2663

try:

2664

return rfc3339_duration_to_delta(interval)

2665

except ValueError:

2666

pass

2667

2668

1599

timevalue = datetime.timedelta(0)

2669

1600

for s in interval.split():

2670

1601

try:

2671

suffix = s[-1]

1602

suffix = unicode(s[-1])

2672

1603

value = int(s[:-1])

2673

1604

if suffix == "d":

2674

1605

delta = datetime.timedelta(value)

2681

1612

elif suffix == "w":

2682

1613

delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)

2683

1614

else:

2684

raise ValueError("Unknown suffix {!r}".format(suffix))

2685

except IndexError as e:

1615

raise ValueError("Unknown suffix %r" % suffix)

1616

except (ValueError, IndexError), e:

2686

1617

raise ValueError(*(e.args))

2687

1618

timevalue += delta

2688

1619

return timevalue

2689

1620

2690

1621

1622

def if_nametoindex(interface):

1623

"""Call the C function if_nametoindex(), or equivalent

1624

1625

Note: This function cannot accept a unicode string."""

1626

global if_nametoindex

1627

try:

1628

if_nametoindex = (ctypes.cdll.LoadLibrary

1629

(ctypes.util.find_library("c"))

1630

.if_nametoindex)

1631

except (OSError, AttributeError):

1632

logger.warning("Doing if_nametoindex the hard way")

1633

def if_nametoindex(interface):

1634

"Get an interface index the hard way, i.e. using fcntl()"

1635

SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h

1636

with contextlib.closing(socket.socket()) as s:

1637

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1638

struct.pack(str("16s16x"),

1639

interface))

1640

interface_index = struct.unpack(str("I"),

1641

ifreq[16:20])[0]

1642

return interface_index

1643

return if_nametoindex(interface)

1644

1645

2691

1646

def daemon(nochdir = False, noclose = False):

2692

1647

"""See daemon(3). Standard BSD Unix function.

2693

1648

2701

1656

sys.exit()

2702

1657

if not noclose:

2703

1658

# Close all standard open file descriptors

2704

null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)

1659

null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)

2705

1660

if not stat.S_ISCHR(os.fstat(null).st_mode):

2706

1661

raise OSError(errno.ENODEV,

2707

"{} not a character device"

2708

.format(os.devnull))

1662

"%s not a character device"

1663

% os.path.devnull)

2709

1664

os.dup2(null, sys.stdin.fileno())

2710

1665

os.dup2(null, sys.stdout.fileno())

2711

1666

os.dup2(null, sys.stderr.fileno())

2718

1673

##################################################################

2719

1674

# Parsing of options, both command line and config file

2720

1675

2721

parser = argparse.ArgumentParser()

2722

parser.add_argument("-v", "--version", action="version",

2723

version = "%(prog)s {}".format(version),

2724

help="show version number and exit")

2725

parser.add_argument("-i", "--interface", metavar="IF",

2726

help="Bind to interface IF")

2727

parser.add_argument("-a", "--address",

2728

help="Address to listen for requests on")

2729

parser.add_argument("-p", "--port", type=int,

2730

help="Port number to receive requests on")

2731

parser.add_argument("--check", action="store_true",

2732

help="Run self-test")

2733

parser.add_argument("--debug", action="store_true",

2734

help="Debug mode; run in foreground and log"

2735

" to terminal", default=None)

2736

parser.add_argument("--debuglevel", metavar="LEVEL",

2737

help="Debug level for stdout output")

2738

parser.add_argument("--priority", help="GnuTLS"

2739

" priority string (see GnuTLS documentation)")

2740

parser.add_argument("--servicename",

2741

metavar="NAME", help="Zeroconf service name")

2742

parser.add_argument("--configdir",

2743

default="/etc/mandos", metavar="DIR",

2744

help="Directory to search for configuration"

2745

" files")

2746

parser.add_argument("--no-dbus", action="store_false",

2747

dest="use_dbus", help="Do not provide D-Bus"

2748

" system bus interface", default=None)

2749

parser.add_argument("--no-ipv6", action="store_false",

2750

dest="use_ipv6", help="Do not use IPv6",

2751

default=None)

2752

parser.add_argument("--no-restore", action="store_false",

2753

dest="restore", help="Do not restore stored"

2754

" state", default=None)

2755

parser.add_argument("--socket", type=int,

2756

help="Specify a file descriptor to a network"

2757

" socket to use instead of creating one")

2758

parser.add_argument("--statedir", metavar="DIR",

2759

help="Directory to save/restore state in")

2760

parser.add_argument("--foreground", action="store_true",

2761

help="Run in foreground", default=None)

2762

parser.add_argument("--no-zeroconf", action="store_false",

2763

dest="zeroconf", help="Do not use Zeroconf",

2764

default=None)

2765

2766

options = parser.parse_args()

1676

parser = optparse.OptionParser(version = "%%prog %s" % version)

1677

parser.add_option("-i", "--interface", type="string",

1678

metavar="IF", help="Bind to interface IF")

1679

parser.add_option("-a", "--address", type="string",

1680

help="Address to listen for requests on")

1681

parser.add_option("-p", "--port", type="int",

1682

help="Port number to receive requests on")

1683

parser.add_option("--check", action="store_true",

1684

help="Run self-test")

1685

parser.add_option("--debug", action="store_true",

1686

help="Debug mode; run in foreground and log to"

1687

" terminal")

1688

parser.add_option("--debuglevel", type="string", metavar="LEVEL",

1689

help="Debug level for stdout output")

1690

parser.add_option("--priority", type="string", help="GnuTLS"

1691

" priority string (see GnuTLS documentation)")

1692

parser.add_option("--servicename", type="string",

1693

metavar="NAME", help="Zeroconf service name")

1694

parser.add_option("--configdir", type="string",

1695

default="/etc/mandos", metavar="DIR",

1696

help="Directory to search for configuration"

1697

" files")

1698

parser.add_option("--no-dbus", action="store_false",

1699

dest="use_dbus", help="Do not provide D-Bus"

1700

" system bus interface")

1701

parser.add_option("--no-ipv6", action="store_false",

1702

dest="use_ipv6", help="Do not use IPv6")

1703

options = parser.parse_args()[0]

2767

1704

2768

1705

if options.check:

2769

1706

import doctest

2770

fail_count, test_count = doctest.testmod()

2771

sys.exit(os.EX_OK if fail_count == 0 else 1)

1707

doctest.testmod()

1708

sys.exit()

2772

1709

2773

1710

# Default values for config file for server-global settings

2774

1711

server_defaults = { "interface": "",

2776

1713

"port": "",

2777

1714

"debug": "False",

2778

1715

"priority":

2779

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"

2780

":+SIGN-DSA-SHA256",

1716

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",

2781

1717

"servicename": "Mandos",

2782

1718

"use_dbus": "True",

2783

1719

"use_ipv6": "True",

2784

1720

"debuglevel": "",

2785

"restore": "True",

2786

"socket": "",

2787

"statedir": "/var/lib/mandos",

2788

"foreground": "False",

2789

"zeroconf": "True",

2790

}

1721

}

2791

1722

2792

1723

# Parse config file for server-global settings

2793

1724

server_config = configparser.SafeConfigParser(server_defaults)

2794

1725

del server_defaults

2795

server_config.read(os.path.join(options.configdir, "mandos.conf"))

1726

server_config.read(os.path.join(options.configdir,

1727

"mandos.conf"))

2796

1728

# Convert the SafeConfigParser object to a dict

2797

1729

server_settings = server_config.defaults()

2798

1730

# Use the appropriate methods on the non-string config options

2799

for option in ("debug", "use_dbus", "use_ipv6", "foreground"):

1731

for option in ("debug", "use_dbus", "use_ipv6"):

2800

1732

server_settings[option] = server_config.getboolean("DEFAULT",

2801

1733

option)

2802

1734

if server_settings["port"]:

2803

1735

server_settings["port"] = server_config.getint("DEFAULT",

2804

1736

"port")

2805

if server_settings["socket"]:

2806

server_settings["socket"] = server_config.getint("DEFAULT",

2807

"socket")

2808

# Later, stdin will, and stdout and stderr might, be dup'ed

2809

# over with an opened os.devnull. But we don't want this to

2810

# happen with a supplied network socket.

2811

if 0 <= server_settings["socket"] <= 2:

2812

server_settings["socket"] = os.dup(server_settings

2813

["socket"])

2814

1737

del server_config

2815

1738

2816

1739

# Override the settings from the config file with command line

2817

1740

# options, if set.

2818

1741

for option in ("interface", "address", "port", "debug",

2819

"priority", "servicename", "configdir", "use_dbus",

2820

"use_ipv6", "debuglevel", "restore", "statedir",

2821

"socket", "foreground", "zeroconf"):

1742

"priority", "servicename", "configdir",

1743

"use_dbus", "use_ipv6", "debuglevel"):

2822

1744

value = getattr(options, option)

2823

1745

if value is not None:

2824

1746

server_settings[option] = value

2825

1747

del options

2826

1748

# Force all strings to be unicode

2827

1749

for option in server_settings.keys():

2828

if isinstance(server_settings[option], bytes):

2829

server_settings[option] = (server_settings[option]

2830

.decode("utf-8"))

2831

# Force all boolean options to be boolean

2832

for option in ("debug", "use_dbus", "use_ipv6", "restore",

2833

"foreground", "zeroconf"):

2834

server_settings[option] = bool(server_settings[option])

2835

# Debug implies foreground

2836

if server_settings["debug"]:

2837

server_settings["foreground"] = True

1750

if type(server_settings[option]) is str:

1751

server_settings[option] = unicode(server_settings[option])

2838

1752

# Now we have our good server settings in "server_settings"

2839

1753

2840

1754

##################################################################

2841

1755

2842

if (not server_settings["zeroconf"]

2843

and not (server_settings["port"]

2844

or server_settings["socket"] != "")):

2845

parser.error("Needs port or socket to work without Zeroconf")

2846

2847

1756

# For convenience

2848

1757

debug = server_settings["debug"]

2849

1758

debuglevel = server_settings["debuglevel"]

2850

1759

use_dbus = server_settings["use_dbus"]

2851

1760

use_ipv6 = server_settings["use_ipv6"]

2852

stored_state_path = os.path.join(server_settings["statedir"],

2853

stored_state_file)

2854

foreground = server_settings["foreground"]

2855

zeroconf = server_settings["zeroconf"]

2856

2857

if debug:

2858

initlogger(debug, logging.DEBUG)

2859

else:

2860

if not debuglevel:

2861

initlogger(debug)

2862

else:

2863

level = getattr(logging, debuglevel.upper())

2864

initlogger(debug, level)

2865

1761

2866

1762

if server_settings["servicename"] != "Mandos":

2867

syslogger.setFormatter(

2868

logging.Formatter('Mandos ({}) [%(process)d]:'

2869

' %(levelname)s: %(message)s'.format(

2870

server_settings["servicename"])))

1763

syslogger.setFormatter(logging.Formatter

1764

('Mandos (%s) [%%(process)d]:'

1765

' %%(levelname)s: %%(message)s'

1766

% server_settings["servicename"]))

2871

1767

2872

1768

# Parse config file with clients

2873

client_config = configparser.SafeConfigParser(Client

2874

.client_defaults)

1769

client_defaults = { "timeout": "1h",

1770

"interval": "5m",

1771

"checker": "fping -q -- %%(host)s",

1772

"host": "",

1773

"approval_delay": "0s",

1774

"approval_duration": "1s",

1775

}

1776

client_config = configparser.SafeConfigParser(client_defaults)

2875

1777

client_config.read(os.path.join(server_settings["configdir"],

2876

1778

"clients.conf"))

2877

1779

2878

1780

global mandos_dbus_service

2879

1781

mandos_dbus_service = None

2880

1782

2881

socketfd = None

2882

if server_settings["socket"] != "":

2883

socketfd = server_settings["socket"]

2884

tcp_server = MandosServer(

2885

(server_settings["address"], server_settings["port"]),

2886

ClientHandler,

2887

interface=(server_settings["interface"] or None),

2888

use_ipv6=use_ipv6,

2889

gnutls_priority=server_settings["priority"],

2890

use_dbus=use_dbus,

2891

socketfd=socketfd)

2892

if not foreground:

2893

pidfilename = "/run/mandos.pid"

2894

if not os.path.isdir("/run/."):

2895

pidfilename = "/var/run/mandos.pid"

2896

pidfile = None

1783

tcp_server = MandosServer((server_settings["address"],

1784

server_settings["port"]),

1785

ClientHandler,

1786

interface=(server_settings["interface"]

1787

or None),

1788

use_ipv6=use_ipv6,

1789

gnutls_priority=

1790

server_settings["priority"],

1791

use_dbus=use_dbus)

1792

if not debug:

1793

pidfilename = "/var/run/mandos.pid"

2897

1794

try:

2898

pidfile = codecs.open(pidfilename, "w", encoding="utf-8")

2899

except IOError as e:

2900

logger.error("Could not open file %r", pidfilename,

2901

exc_info=e)

1795

pidfile = open(pidfilename, "w")

1796

except IOError:

1797

logger.error("Could not open file %r", pidfilename)

2902

1798

2903

for name in ("_mandos", "mandos", "nobody"):

1799

try:

1800

uid = pwd.getpwnam("_mandos").pw_uid

1801

gid = pwd.getpwnam("_mandos").pw_gid

1802

except KeyError:

2904

1803

try:

2905

uid = pwd.getpwnam(name).pw_uid

2906

gid = pwd.getpwnam(name).pw_gid

2907

break

1804

uid = pwd.getpwnam("mandos").pw_uid

1805

gid = pwd.getpwnam("mandos").pw_gid

2908

1806

except KeyError:

2909

continue

2910

else:

2911

uid = 65534

2912

gid = 65534

1807

try:

1808

uid = pwd.getpwnam("nobody").pw_uid

1809

gid = pwd.getpwnam("nobody").pw_gid

1810

except KeyError:

1811

uid = 65534

1812

gid = 65534

2913

1813

try:

2914

1814

os.setgid(gid)

2915

1815

os.setuid(uid)

2916

except OSError as error:

2917

if error.errno != errno.EPERM:

2918

raise

1816

except OSError, error:

1817

if error[0] != errno.EPERM:

1818

raise error

2919

1819

1820

if not debug and not debuglevel:

1821

syslogger.setLevel(logging.WARNING)

1822

console.setLevel(logging.WARNING)

1823

if debuglevel:

1824

level = getattr(logging, debuglevel.upper())

1825

syslogger.setLevel(level)

1826

console.setLevel(level)

1827

2920

1828

if debug:

2921

1829

# Enable all possible GnuTLS debugging

2922

1830

2923

1831

# "Use a log level over 10 to enable all debugging options."

2924

1832

# - GnuTLS manual

2925

gnutls.global_set_log_level(11)

1833

gnutls.library.functions.gnutls_global_set_log_level(11)

2926

1834

2927

@gnutls.log_func

1835

@gnutls.library.types.gnutls_log_func

2928

1836

def debug_gnutls(level, string):

2929

1837

logger.debug("GnuTLS: %s", string[:-1])

2930

1838

2931

gnutls.global_set_log_function(debug_gnutls)

1839

(gnutls.library.functions

1840

.gnutls_global_set_log_function(debug_gnutls))

2932

1841

2933

1842

# Redirect stdin so all checkers get /dev/null

2934

null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)

1843

null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)

2935

1844

os.dup2(null, sys.stdin.fileno())

2936

1845

if null > 2:

2937

1846

os.close(null)

1847

else:

1848

# No console logging

1849

logger.removeHandler(console)

2938

1850

2939

1851

# Need to fork before connecting to D-Bus

2940

if not foreground:

1852

if not debug:

2941

1853

# Close all input and output, do double fork, etc.

2942

1854

daemon()

2943

1855

2944

# multiprocessing will use threads, so before we use gobject we

2945

# need to inform gobject that threads will be used.

2946

gobject.threads_init()

2947

2948

1856

global main_loop

2949

1857

# From the Avahi example code

2950

DBusGMainLoop(set_as_default=True)

1858

DBusGMainLoop(set_as_default=True )

2951

1859

main_loop = gobject.MainLoop()

2952

1860

bus = dbus.SystemBus()

2953

1861

# End of Avahi example code

2954

1862

if use_dbus:

2955

1863

try:

2956

bus_name = dbus.service.BusName("se.recompile.Mandos",

2957

bus,

2958

do_not_queue=True)

2959

old_bus_name = dbus.service.BusName(

2960

"se.bsnet.fukt.Mandos", bus,

2961

do_not_queue=True)

2962

except dbus.exceptions.DBusException as e:

2963

logger.error("Disabling D-Bus:", exc_info=e)

1864

bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",

1865

bus, do_not_queue=True)

1866

except dbus.exceptions.NameExistsException, e:

1867

logger.error(unicode(e) + ", disabling D-Bus")

2964

1868

use_dbus = False

2965

1869

server_settings["use_dbus"] = False

2966

1870

tcp_server.use_dbus = False

2967

if zeroconf:

2968

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2969

service = AvahiServiceToSyslog(

2970

name = server_settings["servicename"],

2971

servicetype = "_mandos._tcp",

2972

protocol = protocol,

2973

bus = bus)

2974

if server_settings["interface"]:

2975

service.interface = if_nametoindex(

2976

server_settings["interface"].encode("utf-8"))

1871

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1872

service = AvahiService(name = server_settings["servicename"],

1873

servicetype = "_mandos._tcp",

1874

protocol = protocol, bus = bus)

1875

if server_settings["interface"]:

1876

service.interface = (if_nametoindex

1877

(str(server_settings["interface"])))

2977

1878

2978

1879

global multiprocessing_manager

2979

1880

multiprocessing_manager = multiprocessing.Manager()

2981

1882

client_class = Client

2982

1883

if use_dbus:

2983

1884

client_class = functools.partial(ClientDBus, bus = bus)

2984

2985

client_settings = Client.config_parser(client_config)

2986

old_client_settings = {}

2987

clients_data = {}

2988

2989

# This is used to redirect stdout and stderr for checker processes

2990

global wnull

2991

wnull = open(os.devnull, "w") # A writable /dev/null

2992

# Only used if server is running in foreground but not in debug

2993

# mode

2994

if debug or not foreground:

2995

wnull.close()

2996

2997

# Get client data and settings from last running state.

2998

if server_settings["restore"]:

2999

try:

3000

with open(stored_state_path, "rb") as stored_state:

3001

clients_data, old_client_settings = pickle.load(

3002

stored_state)

3003

os.remove(stored_state_path)

3004

except IOError as e:

3005

if e.errno == errno.ENOENT:

3006

logger.warning("Could not load persistent state:"

3007

" {}".format(os.strerror(e.errno)))

3008

else:

3009

logger.critical("Could not load persistent state:",

3010

exc_info=e)

3011

raise

3012

except EOFError as e:

3013

logger.warning("Could not load persistent state: "

3014

"EOFError:",

3015

exc_info=e)

3016

3017

with PGPEngine() as pgp:

3018

for client_name, client in clients_data.items():

3019

# Skip removed clients

3020

if client_name not in client_settings:

3021

continue

3022

3023

# Decide which value to use after restoring saved state.

3024

# We have three different values: Old config file,

3025

# new config file, and saved state.

3026

# New config value takes precedence if it differs from old

3027

# config value, otherwise use saved state.

3028

for name, value in client_settings[client_name].items():

3029

try:

3030

# For each value in new config, check if it

3031

# differs from the old config value (Except for

3032

# the "secret" attribute)

3033

if (name != "secret"

3034

and (value !=

3035

old_client_settings[client_name][name])):

3036

client[name] = value

3037

except KeyError:

3038

pass

3039

3040

# Clients who has passed its expire date can still be

3041

# enabled if its last checker was successful. A Client

3042

# whose checker succeeded before we stored its state is

3043

# assumed to have successfully run all checkers during

3044

# downtime.

3045

if client["enabled"]:

3046

if datetime.datetime.utcnow() >= client["expires"]:

3047

if not client["last_checked_ok"]:

3048

logger.warning(

3049

"disabling client {} - Client never "

3050

"performed a successful checker".format(

3051

client_name))

3052

client["enabled"] = False

3053

elif client["last_checker_status"] != 0:

3054

logger.warning(

3055

"disabling client {} - Client last"

3056

" checker failed with error code"

3057

" {}".format(

3058

client_name,

3059

client["last_checker_status"]))

3060

client["enabled"] = False

3061

else:

3062

client["expires"] = (

3063

datetime.datetime.utcnow()

3064

+ client["timeout"])

3065

logger.debug("Last checker succeeded,"

3066

" keeping {} enabled".format(

3067

client_name))

1885

def client_config_items(config, section):

1886

special_settings = {

1887

"approved_by_default":

1888

lambda: config.getboolean(section,

1889

"approved_by_default"),

1890

}

1891

for name, value in config.items(section):

3068

1892

try:

3069

client["secret"] = pgp.decrypt(

3070

client["encrypted_secret"],

3071

client_settings[client_name]["secret"])

3072

except PGPError:

3073

# If decryption fails, we use secret from new settings

3074

logger.debug("Failed to decrypt {} old secret".format(

3075

client_name))

3076

client["secret"] = (client_settings[client_name]

3077

["secret"])

3078

3079

# Add/remove clients based on new changes made to config

3080

for client_name in (set(old_client_settings)

3081

- set(client_settings)):

3082

del clients_data[client_name]

3083

for client_name in (set(client_settings)

3084

- set(old_client_settings)):

3085

clients_data[client_name] = client_settings[client_name]

3086

3087

# Create all client objects

3088

for client_name, client in clients_data.items():

3089

tcp_server.clients[client_name] = client_class(

3090

name = client_name,

3091

settings = client,

3092

server_settings = server_settings)

3093

1893

yield (name, special_settings[name]())

1894

except KeyError:

1895

yield (name, value)

1896

1897

tcp_server.clients.update(set(

1898

client_class(name = section,

1899

config= dict(client_config_items(

1900

client_config, section)))

1901

for section in client_config.sections()))

3094

1902

if not tcp_server.clients:

3095

1903

logger.warning("No clients defined")

3096

3097

if not foreground:

3098

if pidfile is not None:

3099

pid = os.getpid()

3100

try:

3101

with pidfile:

3102

print(pid, file=pidfile)

3103

except IOError:

3104

logger.error("Could not write to file %r with PID %d",

3105

pidfilename, pid)

3106

del pidfile

1904

1905

if not debug:

1906

try:

1907

with pidfile:

1908

pid = os.getpid()

1909

pidfile.write(str(pid) + "\n".encode("utf-8"))

1910

del pidfile

1911

except IOError:

1912

logger.error("Could not write to file %r with PID %d",

1913

pidfilename, pid)

1914

except NameError:

1915

# "pidfile" was never created

1916

pass

3107

1917

del pidfilename

3108

1918

1919

signal.signal(signal.SIGINT, signal.SIG_IGN)

1920

3109

1921

signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())

3110

1922

signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())

3111

1923

3112

1924

if use_dbus:

3113

3114

@alternate_dbus_interfaces(

3115

{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })

3116

class MandosDBusService(DBusObjectWithObjectManager):

1925

class MandosDBusService(dbus.service.Object):

3117

1926

"""A D-Bus proxy object"""

3118

3119

1927

def __init__(self):

3120

1928

dbus.service.Object.__init__(self, bus, "/")

3121

3122

_interface = "se.recompile.Mandos"

1929

_interface = "se.bsnet.fukt.Mandos"

3123

1930

3124

1931

@dbus.service.signal(_interface, signature="o")

3125

1932

def ClientAdded(self, objpath):

3131

1938

"D-Bus signal"

3132

1939

pass

3133

1940

3134

@dbus_annotations({"org.freedesktop.DBus.Deprecated":

3135

"true"})

3136

1941

@dbus.service.signal(_interface, signature="os")

3137

1942

def ClientRemoved(self, objpath, name):

3138

1943

"D-Bus signal"

3139

1944

pass

3140

1945

3141

@dbus_annotations({"org.freedesktop.DBus.Deprecated":

3142

"true"})

3143

1946

@dbus.service.method(_interface, out_signature="ao")

3144

1947

def GetAllClients(self):

3145

1948

"D-Bus method"

3146

return dbus.Array(c.dbus_object_path for c in

3147

tcp_server.clients.itervalues())

1949

return dbus.Array(c.dbus_object_path

1950

for c in tcp_server.clients)

3148

1951

3149

@dbus_annotations({"org.freedesktop.DBus.Deprecated":

3150

"true"})

3151

1952

@dbus.service.method(_interface,

3152

1953

out_signature="a{oa{sv}}")

3153

1954

def GetAllClientsWithProperties(self):

3154

1955

"D-Bus method"

3155

1956

return dbus.Dictionary(

3156

{ c.dbus_object_path: c.GetAll(

3157

"se.recompile.Mandos.Client")

3158

for c in tcp_server.clients.itervalues() },

1957

((c.dbus_object_path, c.GetAll(""))

1958

for c in tcp_server.clients),

3159

1959

signature="oa{sv}")

3160

1960

3161

1961

@dbus.service.method(_interface, in_signature="o")

3162

1962

def RemoveClient(self, object_path):

3163

1963

"D-Bus method"

3164

for c in tcp_server.clients.itervalues():

1964

for c in tcp_server.clients:

3165

1965

if c.dbus_object_path == object_path:

3166

del tcp_server.clients[c.name]

1966

tcp_server.clients.remove(c)

3167

1967

c.remove_from_connection()

3168

# Don't signal the disabling

1968

# Don't signal anything except ClientRemoved

3169

1969

c.disable(quiet=True)

3170

# Emit D-Bus signal for removal

3171

self.client_removed_signal(c)

1970

# Emit D-Bus signal

1971

self.ClientRemoved(object_path, c.name)

3172

1972

return

3173

1973

raise KeyError(object_path)

3174

1974

3175

1975

del _interface

3176

3177

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3178

out_signature = "a{oa{sa{sv}}}")

3179

def GetManagedObjects(self):

3180

"""D-Bus method"""

3181

return dbus.Dictionary(

3182

{ client.dbus_object_path:

3183

dbus.Dictionary(

3184

{ interface: client.GetAll(interface)

3185

for interface in

3186

client._get_all_interface_names()})

3187

for client in tcp_server.clients.values()})

3188

3189

def client_added_signal(self, client):

3190

"""Send the new standard signal and the old signal"""

3191

if use_dbus:

3192

# New standard signal

3193

self.InterfacesAdded(

3194

client.dbus_object_path,

3195

dbus.Dictionary(

3196

{ interface: client.GetAll(interface)

3197

for interface in

3198

client._get_all_interface_names()}))

3199

# Old signal

3200

self.ClientAdded(client.dbus_object_path)

3201

3202

def client_removed_signal(self, client):

3203

"""Send the new standard signal and the old signal"""

3204

if use_dbus:

3205

# New standard signal

3206

self.InterfacesRemoved(

3207

client.dbus_object_path,

3208

client._get_all_interface_names())

3209

# Old signal

3210

self.ClientRemoved(client.dbus_object_path,

3211

client.name)

3212

1976

3213

1977

mandos_dbus_service = MandosDBusService()

3214

1978

3215

1979

def cleanup():

3216

1980

"Cleanup function; run on exit"

3217

if zeroconf:

3218

service.cleanup()

3219

3220

multiprocessing.active_children()

3221

wnull.close()

3222

if not (tcp_server.clients or client_settings):

3223

return

3224

3225

# Store client before exiting. Secrets are encrypted with key

3226

# based on what config file has. If config file is

3227

# removed/edited, old secret will thus be unrecovable.

3228

clients = {}

3229

with PGPEngine() as pgp:

3230

for client in tcp_server.clients.itervalues():

3231

key = client_settings[client.name]["secret"]

3232

client.encrypted_secret = pgp.encrypt(client.secret,

3233

key)

3234

client_dict = {}

3235

3236

# A list of attributes that can not be pickled

3237

# + secret.

3238

exclude = { "bus", "changedstate", "secret",

3239

"checker", "server_settings" }

3240

for name, typ in inspect.getmembers(dbus.service

3241

.Object):

3242

exclude.add(name)

3243

3244

client_dict["encrypted_secret"] = (client

3245

.encrypted_secret)

3246

for attr in client.client_structure:

3247

if attr not in exclude:

3248

client_dict[attr] = getattr(client, attr)

3249

3250

clients[client.name] = client_dict

3251

del client_settings[client.name]["secret"]

3252

3253

try:

3254

with tempfile.NamedTemporaryFile(

3255

mode='wb',

3256

suffix=".pickle",

3257

prefix='clients-',

3258

dir=os.path.dirname(stored_state_path),

3259

delete=False) as stored_state:

3260

pickle.dump((clients, client_settings), stored_state)

3261

tempname = stored_state.name

3262

os.rename(tempname, stored_state_path)

3263

except (IOError, OSError) as e:

3264

if not debug:

3265

try:

3266

os.remove(tempname)

3267

except NameError:

3268

pass

3269

if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):

3270

logger.warning("Could not save persistent state: {}"

3271

.format(os.strerror(e.errno)))

3272

else:

3273

logger.warning("Could not save persistent state:",

3274

exc_info=e)

3275

raise

3276

3277

# Delete all clients, and settings from config

1981

service.cleanup()

1982

3278

1983

while tcp_server.clients:

3279

name, client = tcp_server.clients.popitem()

1984

client = tcp_server.clients.pop()

3280

1985

if use_dbus:

3281

1986

client.remove_from_connection()

3282

# Don't signal the disabling

1987

client.disable_hook = None

1988

# Don't signal anything except ClientRemoved

3283

1989

client.disable(quiet=True)

3284

# Emit D-Bus signal for removal

3285

1990

if use_dbus:

3286

mandos_dbus_service.client_removed_signal(client)

3287

client_settings.clear()

1991

# Emit D-Bus signal

1992

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

1993

client.name)

3288

1994

3289

1995

atexit.register(cleanup)

3290

1996

3291

for client in tcp_server.clients.itervalues():

1997

for client in tcp_server.clients:

3292

1998

if use_dbus:

3293

# Emit D-Bus signal for adding

3294

mandos_dbus_service.client_added_signal(client)

3295

# Need to initiate checking of clients

3296

if client.enabled:

3297

client.init_checker()

1999

# Emit D-Bus signal

2000

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2001

client.enable()

3298

2002

3299

2003

tcp_server.enable()

3300

2004

tcp_server.server_activate()

3301

2005

3302

2006

# Find out what port we got

3303

if zeroconf:

3304

service.port = tcp_server.socket.getsockname()[1]

2007

service.port = tcp_server.socket.getsockname()[1]

3305

2008

if use_ipv6:

3306

2009

logger.info("Now listening on address %r, port %d,"

3307

" flowinfo %d, scope_id %d",

3308

*tcp_server.socket.getsockname())

2010

" flowinfo %d, scope_id %d"

2011

% tcp_server.socket.getsockname())

3309

2012

else: # IPv4

3310

logger.info("Now listening on address %r, port %d",

3311

*tcp_server.socket.getsockname())

2013

logger.info("Now listening on address %r, port %d"

2014

% tcp_server.socket.getsockname())

3312

2015

3313

2016

#service.interface = tcp_server.socket.getsockname()[3]

3314

2017

3315

2018

try:

3316

if zeroconf:

3317

# From the Avahi example code

3318

try:

3319

service.activate()

3320

except dbus.exceptions.DBusException as error:

3321

logger.critical("D-Bus Exception", exc_info=error)

3322

cleanup()

3323

sys.exit(1)

3324

# End of Avahi example code

2019

# From the Avahi example code

2020

try:

2021

service.activate()

2022

except dbus.exceptions.DBusException, error:

2023

logger.critical("DBusException: %s", error)

2024

cleanup()

2025

sys.exit(1)

2026

# End of Avahi example code

3325

2027

3326

2028

gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,

3327

2029

lambda *args, **kwargs:

3330

2032

3331

2033

logger.debug("Starting main loop")

3332

2034

main_loop.run()

3333

except AvahiError as error:

3334

logger.critical("Avahi Error", exc_info=error)

2035

except AvahiError, error:

2036

logger.critical("AvahiError: %s", error)

3335

2037

cleanup()

3336

2038

sys.exit(1)

3337

2039

except KeyboardInterrupt:

3342

2044

# Must run before the D-Bus bus name gets deregistered

3343

2045

cleanup()

3344

2046

3345

3346

2047

if __name__ == '__main__':

3347

2048

main()