/mandos/release : revision 237.7.349

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#!/usr/bin/python

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#!/usr/bin/python2.7

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

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#

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

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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import SocketServer as socketserver

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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 socket

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import optparse

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import argparse

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import datetime

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import errno

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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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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 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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import cPickle as pickle

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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 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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import gobject

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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 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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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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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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class AvahiError(Exception):

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232

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

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233

self.value = value

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

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def __unicode__(self):

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return unicode(repr(self.value))

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

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**kwargs)

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

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See <https://www.iana.org/assignments/service-names-port-numbers>

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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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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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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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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def rename(self):

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self.entry_group_state_changed_match = None

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def rename(self, remove=True):

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

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if self.rename_count >= self.max_renames:

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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 = unicode(self.server.GetAlternativeServiceName(self.name))

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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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logger.info("Changing Zeroconf service name to %r ...",

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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if remove:

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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, error:

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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except dbus.exceptions.DBusException as error:

310

if (error.get_dbus_name()

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

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

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return self.rename(remove=False)

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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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def remove(self):

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320

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

321

if self.entry_group_state_changed_match is not None:

322

self.entry_group_state_changed_match.remove()

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self.entry_group_state_changed_match = None

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324

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()

182

330

if self.group is None:

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331

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.group.connect_to_signal('StateChanged',

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self

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.entry_group_state_changed)

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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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logger.debug("Adding Zeroconf service '%s' of type '%s' ...",

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self.name, self.type)

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340

self.group.AddService(

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346

dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

203

352

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

209

358

self.rename()

210

359

elif state == avahi.ENTRY_GROUP_FAILURE:

211

360

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

212

unicode(error))

213

raise AvahiGroupError("State changed: %s"

214

% unicode(error))

361

str(error))

362

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

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def cleanup(self):

216

365

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

217

366

if self.group is not None:

218

self.group.Free()

367

try:

368

self.group.Free()

369

except (dbus.exceptions.UnknownMethodException,

370

dbus.exceptions.DBusException):

371

pass

219

372

self.group = None

220

def server_state_changed(self, state):

373

self.remove()

374

375

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

221

376

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

222

377

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

223

if state == avahi.SERVER_COLLISION:

224

logger.error("Zeroconf server name collision")

225

self.remove()

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()

226

391

elif state == avahi.SERVER_RUNNING:

227

self.add()

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

228

410

def activate(self):

229

411

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

230

412

if self.server is None:

231

413

self.server = dbus.Interface(

232

414

self.bus.get_object(avahi.DBUS_NAME,

233

avahi.DBUS_PATH_SERVER),

415

avahi.DBUS_PATH_SERVER,

416

follow_name_owner_changes=True),

234

417

avahi.DBUS_INTERFACE_SERVER)

235

418

self.server.connect_to_signal("StateChanged",

236

self.server_state_changed)

419

self.server_state_changed)

237

420

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

238

421

239

422

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

240

680

class Client(object):

241

681

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

242

682

243

683

Attributes:

244

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

684

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

245

685

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

246

686

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

247

687

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

254

694

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

255

695

checker_initiator_tag: a gobject event source tag, or None

256

696

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

257

699

current_checker_command: string; current running checker_command

258

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

259

700

disable_initiator_tag: a gobject event source tag, or None

260

701

enabled: bool()

261

702

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

264

705

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

265

706

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

266

707

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

267

last_enabled: datetime.datetime(); (UTC)

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

268

714

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

269

715

D-Bus identifiers

270

716

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

271

717

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

272

718

until this client is disabled

719

extended_timeout: extra long timeout when secret has been sent

273

720

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()

274

724

"""

275

725

276

726

runtime_expansions = ("approval_delay", "approval_duration",

277

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

278

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

727

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

728

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

729

"last_approval_request", "last_checked_ok",

279

730

"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

}

280

742

281

743

@staticmethod

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."""

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):

303

794

self.name = name

304

if config is None:

305

config = {}

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

306

812

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(" ", ""))

312

813

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

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

814

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

815

datetime.datetime.utcnow())

816

817

# attributes specific for this server instance

332

818

self.checker = None

333

819

self.checker_initiator_tag = None

334

820

self.disable_initiator_tag = None

335

821

self.checker_callback_tag = None

336

self.checker_command = config["checker"]

337

822

self.current_checker_command = None

338

self.last_connect = None

339

self._approved = None

340

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

341

True)

823

self.approved = None

342

824

self.approvals_pending = 0

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())

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)

348

836

837

# Send notice to process children that client state has changed

349

838

def send_changedstate(self):

350

self.changedstate.acquire()

351

self.changedstate.notify_all()

352

self.changedstate.release()

353

839

with self.changedstate:

840

self.changedstate.notify_all()

841

354

842

def enable(self):

355

843

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

356

844

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

357

845

# Already enabled

358

846

return

359

self.send_changedstate()

847

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

848

self.enabled = True

360

849

self.last_enabled = datetime.datetime.utcnow()

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()

850

self.init_checker()

851

self.send_changedstate()

373

852

374

853

def disable(self, quiet=True):

375

854

"""Disable this client."""

376

855

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

377

856

return False

378

857

if not quiet:

379

self.send_changedstate()

380

if not quiet:

381

858

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

382

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

859

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

383

860

gobject.source_remove(self.disable_initiator_tag)

384

861

self.disable_initiator_tag = None

385

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

862

self.expires = None

863

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

386

864

gobject.source_remove(self.checker_initiator_tag)

387

865

self.checker_initiator_tag = None

388

866

self.stop_checker()

389

if self.disable_hook:

390

self.disable_hook(self)

391

867

self.enabled = False

868

if not quiet:

869

self.send_changedstate()

392

870

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

393

871

return False

394

872

395

873

def __del__(self):

396

self.disable_hook = None

397

874

self.disable()

398

875

399

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

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):

400

894

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

401

895

self.checker_callback_tag = None

402

896

self.checker = None

403

if os.WIFEXITED(condition):

404

exitstatus = os.WEXITSTATUS(condition)

405

if exitstatus == 0:

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:

406

905

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

407

906

vars(self))

408

907

self.checked_ok()

409

908

else:

410

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

411

vars(self))

909

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

412

910

else:

911

self.last_checker_status = -1

912

self.last_checker_signal = -returncode

413

913

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

414

914

vars(self))

915

return False

415

916

416

917

def checked_ok(self):

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

"""

918

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

422

919

self.last_checked_ok = datetime.datetime.utcnow()

423

gobject.source_remove(self.disable_initiator_tag)

424

self.disable_initiator_tag = (gobject.timeout_add

425

(self.timeout_milliseconds(),

426

self.disable))

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

427

935

428

936

def need_approval(self):

429

937

self.last_approval_request = datetime.datetime.utcnow()

434

942

If a checker already exists, leave it running and do

435

943

nothing."""

436

944

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

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

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

441

949

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

442

950

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

443

951

# should be.

444

952

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)

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

458

957

# Start a new checker if needed

459

958

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 }

460

963

try:

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

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

479

970

self.current_checker_command = 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)

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)

503

996

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

504

997

return True

505

998

511

1004

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

512

1005

return

513

1006

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

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

1007

self.checker.terminate()

522

1008

self.checker = None

523

1009

524

def dbus_service_property(dbus_interface, signature="v",

525

access="readwrite", byte_arrays=False):

1010

1011

def dbus_service_property(dbus_interface,

1012

signature="v",

1013

access="readwrite",

1014

byte_arrays=False):

526

1015

"""Decorators for marking methods of a DBusObjectWithProperties to

527

1016

become properties on the D-Bus.

528

1017

537

1026

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

538

1027

if byte_arrays and signature != "ay":

539

1028

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

540

" signature %r" % signature)

1029

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

1030

541

1031

def decorator(func):

542

1032

func._dbus_is_property = True

543

1033

func._dbus_interface = dbus_interface

548

1038

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

549

1039

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

550

1040

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

551

1085

return decorator

552

1086

553

1087

554

1088

class DBusPropertyException(dbus.exceptions.DBusException):

555

1089

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

556

1090

"""

557

def __unicode__(self):

558

return unicode(str(self))

1091

pass

559

1092

560

1093

561

1094

class DBusPropertyAccessException(DBusPropertyException):

570

1103

pass

571

1104

572

1105

573

class DBusObjectWithProperties(dbus.service.Object):

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):

574

1196

"""A D-Bus object with properties.

575

1197

576

1198

Classes inheriting from this can use the dbus_service_property

577

1199

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

578

1200

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

579

1201

"""

580

1202

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

592

1203

def _get_dbus_property(self, interface_name, property_name):

593

1204

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

594

1205

property with the specified name and interface.

595

1206

"""

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

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

606

1214

# No such property

607

raise DBusPropertyNotFound(self.dbus_object_path + ":"

608

+ interface_name + "."

609

+ property_name)

610

611

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

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",

612

1229

out_signature="v")

613

1230

def Get(self, interface_name, property_name):

614

1231

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

632

1249

# The byte_arrays option is not supported yet on

633

1250

# signatures other than "ay".

634

1251

if prop._dbus_signature != "ay":

635

raise ValueError

636

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

637

for byte in value))

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))

638

1257

prop(value)

639

1258

640

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

1259

@dbus.service.method(dbus.PROPERTIES_IFACE,

1260

in_signature="s",

641

1261

out_signature="a{sv}")

642

1262

def GetAll(self, interface_name):

643

1263

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

644

1264

standard.

645

1265

646

1266

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

647

1267

"""

648

all = {}

649

for name, prop in self._get_all_dbus_properties():

1268

properties = {}

1269

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

650

1270

if (interface_name

651

1271

and interface_name != prop._dbus_interface):

652

1272

# Interface non-empty but did not match

656

1276

continue

657

1277

value = prop()

658

1278

if not hasattr(value, "variant_level"):

659

all[name] = value

1279

properties[name] = value

660

1280

continue

661

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

662

value.variant_level+1)

663

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

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

664

1292

665

1293

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

666

1294

out_signature="s",

667

1295

path_keyword='object_path',

668

1296

connection_keyword='connection')

669

1297

def Introspect(self, object_path, connection):

670

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

1298

"""Overloading of standard D-Bus method.

1299

1300

Inserts property tags and interface annotation tags.

671

1301

"""

672

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

673

connection)

1302

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1303

object_path,

1304

connection)

674

1305

try:

675

1306

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

1307

676

1308

def make_tag(document, name, prop):

677

1309

e = document.createElement("property")

678

1310

e.setAttribute("name", name)

679

1311

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

680

1312

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

681

1313

return e

1314

682

1315

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

1316

# Add property tags

683

1317

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

684

1318

for name, prop

685

in self._get_all_dbus_properties()

1319

in self._get_all_dbus_things("property")

686

1320

if prop._dbus_interface

687

1321

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

688

1322

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)

689

1339

# Add the names to the return values for the

690

1340

# "org.freedesktop.DBus.Properties" methods

691

1341

if (if_tag.getAttribute("name")

704

1354

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

705

1355

document.unlink()

706

1356

except (AttributeError, xml.dom.DOMException,

707

xml.parsers.expat.ExpatError), error:

708

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

709

error)

710

return xmlstring

711

712

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"})

713

1626

class ClientDBus(Client, DBusObjectWithProperties):

714

1627

"""A Client class using D-Bus

715

1628

719

1632

"""

720

1633

721

1634

runtime_expansions = (Client.runtime_expansions

722

+ ("dbus_object_path",))

1635

+ ("dbus_object_path", ))

1636

1637

_interface = "se.recompile.Mandos.Client"

723

1638

724

1639

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

725

1640

726

1641

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

727

self._approvals_pending = 0

728

1642

self.bus = bus

729

1643

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

730

1644

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

731

1645

# the D-Bus

732

client_object_name = unicode(self.name).translate(

1646

client_object_name = str(self.name).translate(

733

1647

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

734

1648

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

735

self.dbus_object_path = (dbus.ObjectPath

736

("/clients/" + client_object_name))

1649

self.dbus_object_path = dbus.ObjectPath(

1650

"/clients/" + client_object_name)

737

1651

DBusObjectWithProperties.__init__(self, self.bus,

738

1652

self.dbus_object_path)

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

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

783

1734

784

1735

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

785

1736

try:

790

1741

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

791

1742

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

792

1743

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)

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:

802

1751

# Emit D-Bus signal

803

1752

self.CheckerCompleted(dbus.Int16(exitstatus),

804

dbus.Int64(condition),

1753

# This is specific to GNU libC

1754

dbus.Int64(exitstatus << 8),

805

1755

dbus.String(command))

806

1756

else:

807

1757

# Emit D-Bus signal

808

1758

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

809

dbus.Int64(condition),

1759

dbus.Int64(

1760

# This is specific to GNU libC

1761

(exitstatus << 8)

1762

| self.last_checker_signal),

810

1763

dbus.String(command))

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

1764

return ret

832

1765

833

1766

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

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

1767

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

839

1768

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

840

1769

# Only if new checker process was started

841

1770

if (self.checker is not None

842

1771

and old_checker_pid != self.checker.pid):

843

1772

# Emit D-Bus signal

844

1773

self.CheckerStarted(self.current_checker_command)

845

self.PropertyChanged(

846

dbus.String("CheckerRunning"),

847

dbus.Boolean(True, variant_level=1))

848

1774

return r

849

1775

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

859

1776

def _reset_approved(self):

860

self._approved = None

1777

self.approved = None

861

1778

return False

862

1779

863

1780

def approve(self, value=True):

1781

self.approved = value

1782

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

1783

* 1000), self._reset_approved)

864

1784

self.send_changedstate()

865

self._approved = value

866

gobject.timeout_add(self._timedelta_to_milliseconds

867

(self.approval_duration),

868

self._reset_approved)

869

870

1785

871

1786

## D-Bus methods, signals & properties

872

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

1787

1788

## Interfaces

873

1789

874

1790

## Signals

875

1791

886

1802

pass

887

1803

888

1804

# PropertyChanged - signal

1805

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

889

1806

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

890

1807

def PropertyChanged(self, property, value):

891

1808

"D-Bus signal"

922

1839

# CheckedOK - method

923

1840

@dbus.service.method(_interface)

924

1841

def CheckedOK(self):

925

return self.checked_ok()

1842

self.checked_ok()

926

1843

927

1844

# Enable - method

1845

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

928

1846

@dbus.service.method(_interface)

929

1847

def Enable(self):

930

1848

"D-Bus method"

931

1849

self.enable()

932

1850

933

1851

# StartChecker - method

1852

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

934

1853

@dbus.service.method(_interface)

935

1854

def StartChecker(self):

936

1855

"D-Bus method"

937

1856

self.start_checker()

938

1857

939

1858

# Disable - method

1859

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

940

1860

@dbus.service.method(_interface)

941

1861

def Disable(self):

942

1862

"D-Bus method"

943

1863

self.disable()

944

1864

945

1865

# StopChecker - method

1866

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

946

1867

@dbus.service.method(_interface)

947

1868

def StopChecker(self):

948

1869

self.stop_checker()

955

1876

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

956

1877

957

1878

# ApprovedByDefault - property

958

@dbus_service_property(_interface, signature="b",

1879

@dbus_service_property(_interface,

1880

signature="b",

959

1881

access="readwrite")

960

1882

def ApprovedByDefault_dbus_property(self, value=None):

961

1883

if value is None: # get

962

1884

return dbus.Boolean(self.approved_by_default)

963

1885

self.approved_by_default = bool(value)

964

# Emit D-Bus signal

965

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

966

dbus.Boolean(value, variant_level=1))

967

1886

968

1887

# ApprovalDelay - property

969

@dbus_service_property(_interface, signature="t",

1888

@dbus_service_property(_interface,

1889

signature="t",

970

1890

access="readwrite")

971

1891

def ApprovalDelay_dbus_property(self, value=None):

972

1892

if value is None: # get

973

return dbus.UInt64(self.approval_delay_milliseconds())

1893

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

1894

* 1000)

974

1895

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))

978

1896

979

1897

# ApprovalDuration - property

980

@dbus_service_property(_interface, signature="t",

1898

@dbus_service_property(_interface,

1899

signature="t",

981

1900

access="readwrite")

982

1901

def ApprovalDuration_dbus_property(self, value=None):

983

1902

if value is None: # get

984

return dbus.UInt64(self._timedelta_to_milliseconds(

985

self.approval_duration))

1903

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

1904

* 1000)

986

1905

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))

990

1906

991

1907

# Name - property

1908

@dbus_annotations(

1909

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

992

1910

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

993

1911

def Name_dbus_property(self):

994

1912

return dbus.String(self.name)

995

1913

996

1914

# Fingerprint - property

1915

@dbus_annotations(

1916

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

997

1917

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

998

1918

def Fingerprint_dbus_property(self):

999

1919

return dbus.String(self.fingerprint)

1000

1920

1001

1921

# Host - property

1002

@dbus_service_property(_interface, signature="s",

1922

@dbus_service_property(_interface,

1923

signature="s",

1003

1924

access="readwrite")

1004

1925

def Host_dbus_property(self, value=None):

1005

1926

if value is None: # get

1006

1927

return dbus.String(self.host)

1007

self.host = value

1008

# Emit D-Bus signal

1009

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

1010

dbus.String(value, variant_level=1))

1928

self.host = str(value)

1011

1929

1012

1930

# Created - property

1931

@dbus_annotations(

1932

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

1013

1933

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

1014

1934

def Created_dbus_property(self):

1015

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

1935

return datetime_to_dbus(self.created)

1016

1936

1017

1937

# LastEnabled - property

1018

1938

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

1019

1939

def LastEnabled_dbus_property(self):

1020

if self.last_enabled is None:

1021

return dbus.String("")

1022

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

1940

return datetime_to_dbus(self.last_enabled)

1023

1941

1024

1942

# Enabled - property

1025

@dbus_service_property(_interface, signature="b",

1943

@dbus_service_property(_interface,

1944

signature="b",

1026

1945

access="readwrite")

1027

1946

def Enabled_dbus_property(self, value=None):

1028

1947

if value is None: # get

1033

1952

self.disable()

1034

1953

1035

1954

# LastCheckedOK - property

1036

@dbus_service_property(_interface, signature="s",

1955

@dbus_service_property(_interface,

1956

signature="s",

1037

1957

access="readwrite")

1038

1958

def LastCheckedOK_dbus_property(self, value=None):

1039

1959

if value is not None:

1040

1960

self.checked_ok()

1041

1961

return

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))

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)

1046

1973

1047

1974

# LastApprovalRequest - property

1048

1975

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

1049

1976

def LastApprovalRequest_dbus_property(self):

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))

1977

return datetime_to_dbus(self.last_approval_request)

1055

1978

1056

1979

# Timeout - property

1057

@dbus_service_property(_interface, signature="t",

1980

@dbus_service_property(_interface,

1981

signature="t",

1058

1982

access="readwrite")

1059

1983

def Timeout_dbus_property(self, value=None):

1060

1984

if value is None: # get

1061

return dbus.UInt64(self.timeout_milliseconds())

1985

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

1986

old_timeout = self.timeout

1062

1987

self.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))

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)

1083

2013

1084

2014

# Interval - property

1085

@dbus_service_property(_interface, signature="t",

2015

@dbus_service_property(_interface,

2016

signature="t",

1086

2017

access="readwrite")

1087

2018

def Interval_dbus_property(self, value=None):

1088

2019

if value is None: # get

1089

return dbus.UInt64(self.interval_milliseconds())

2020

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

1090

2021

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))

1094

2022

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

1095

2023

return

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

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

1102

2031

# Checker - property

1103

@dbus_service_property(_interface, signature="s",

2032

@dbus_service_property(_interface,

2033

signature="s",

1104

2034

access="readwrite")

1105

2035

def Checker_dbus_property(self, value=None):

1106

2036

if value is None: # get

1107

2037

return dbus.String(self.checker_command)

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))

2038

self.checker_command = str(value)

1113

2039

1114

2040

# CheckerRunning - property

1115

@dbus_service_property(_interface, signature="b",

2041

@dbus_service_property(_interface,

2042

signature="b",

1116

2043

access="readwrite")

1117

2044

def CheckerRunning_dbus_property(self, value=None):

1118

2045

if value is None: # get

1123

2050

self.stop_checker()

1124

2051

1125

2052

# ObjectPath - property

2053

@dbus_annotations(

2054

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

2055

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

1126

2056

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

1127

2057

def ObjectPath_dbus_property(self):

1128

2058

return self.dbus_object_path # is already a dbus.ObjectPath

1129

2059

1130

2060

# Secret = property

1131

@dbus_service_property(_interface, signature="ay",

1132

access="write", byte_arrays=True)

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)

1133

2068

def Secret_dbus_property(self, value):

1134

self.secret = str(value)

2069

self.secret = bytes(value)

1135

2070

1136

2071

del _interface

1137

2072

1141

2076

self._pipe = child_pipe

1142

2077

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

1143

2078

if not self._pipe.recv():

1144

raise KeyError()

1145

2079

raise KeyError(fpr)

2080

1146

2081

def __getattribute__(self, name):

1147

if(name == '_pipe'):

2082

if name == '_pipe':

1148

2083

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

1149

2084

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

1150

2085

data = self._pipe.recv()

1151

2086

if data[0] == 'data':

1152

2087

return data[1]

1153

2088

if data[0] == 'function':

2089

1154

2090

def func(*args, **kwargs):

1155

2091

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

1156

2092

return self._pipe.recv()[1]

2093

1157

2094

return func

1158

2095

1159

2096

def __setattr__(self, name, value):

1160

if(name == '_pipe'):

2097

if name == '_pipe':

1161

2098

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

1162

2099

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

1163

2100

1171

2108

def handle(self):

1172

2109

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

1173

2110

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

1174

unicode(self.client_address))

2111

str(self.client_address))

1175

2112

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

1176

2113

self.server.child_pipe.fileno())

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

2114

2115

session = gnutls.ClientSession(self.request)

2116

1188

2117

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

1189

2118

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

1190

2119

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

1193

2122

priority = self.server.gnutls_priority

1194

2123

if priority is None:

1195

2124

priority = "NORMAL"

1196

(gnutls.library.functions

1197

.gnutls_priority_set_direct(session._c_object,

1198

priority, None))

1199

2125

gnutls.priority_set_direct(session._c_object, priority,

2126

None)

2127

1200

2128

# Start communication using the Mandos protocol

1201

2129

# Get protocol number

1202

2130

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

1203

2131

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

1204

2132

try:

1205

2133

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

1206

raise RuntimeError

1207

except (ValueError, IndexError, RuntimeError), error:

2134

raise RuntimeError(line)

2135

except (ValueError, IndexError, RuntimeError) as error:

1208

2136

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

1209

2137

return

1210

2138

1211

2139

# Start GnuTLS connection

1212

2140

try:

1213

2141

session.handshake()

1214

except gnutls.errors.GNUTLSError, error:

2142

except gnutls.Error as error:

1215

2143

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

1216

2144

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

1217

2145

# established. Just abandon the request.

1218

2146

return

1219

2147

logger.debug("Handshake succeeded")

1220

2148

1221

2149

approval_required = False

1222

2150

try:

1223

2151

try:

1224

fpr = self.fingerprint(self.peer_certificate

1225

(session))

1226

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

2152

fpr = self.fingerprint(

2153

self.peer_certificate(session))

2154

except (TypeError, gnutls.Error) as error:

1227

2155

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

1228

2156

return

1229

2157

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

1230

2158

1231

2159

try:

1232

2160

client = ProxyClient(child_pipe, fpr,

1233

2161

self.client_address)

1241

2169

1242

2170

while True:

1243

2171

if not client.enabled:

1244

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

1245

client.name)

2172

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

2173

client.name)

1246

2174

if self.server.use_dbus:

1247

2175

# Emit D-Bus signal

1248

client.Rejected("Disabled")

2176

client.Rejected("Disabled")

1249

2177

return

1250

2178

1251

if client._approved or not client.approval_delay:

2179

if client.approved or not client.approval_delay:

1252

2180

#We are approved or approval is disabled

1253

2181

break

1254

elif client._approved is None:

2182

elif client.approved is None:

1255

2183

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

1256

2184

client.name)

1257

2185

if self.server.use_dbus:

1258

2186

# Emit D-Bus signal

1259

2187

client.NeedApproval(

1260

client.approval_delay_milliseconds(),

1261

client.approved_by_default)

2188

client.approval_delay.total_seconds()

2189

* 1000, client.approved_by_default)

1262

2190

else:

1263

2191

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

1264

2192

client.name)

1268

2196

return

1269

2197

1270

2198

#wait until timeout or approved

1271

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

1272

2199

time = datetime.datetime.now()

1273

2200

client.changedstate.acquire()

1274

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

2201

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

1275

2202

client.changedstate.release()

1276

2203

time2 = datetime.datetime.now()

1277

2204

if (time2 - time) >= delay:

1292

2219

while sent_size < len(client.secret):

1293

2220

try:

1294

2221

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

1295

except (gnutls.errors.GNUTLSError), error:

1296

logger.warning("gnutls send failed")

2222

except gnutls.Error as error:

2223

logger.warning("gnutls send failed",

2224

exc_info=error)

1297

2225

return

1298

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

1299

sent, len(client.secret)

1300

- (sent_size + sent))

2226

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

2227

len(client.secret) - (sent_size

2228

+ sent))

1301

2229

sent_size += sent

1302

2230

1303

2231

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

1304

# bump the timeout as if seen

1305

client.checked_ok()

2232

# bump the timeout using extended_timeout

2233

client.bump_timeout(client.extended_timeout)

1306

2234

if self.server.use_dbus:

1307

2235

# Emit D-Bus signal

1308

2236

client.GotSecret()

1312

2240

client.approvals_pending -= 1

1313

2241

try:

1314

2242

session.bye()

1315

except (gnutls.errors.GNUTLSError), error:

1316

logger.warning("GnuTLS bye failed")

2243

except gnutls.Error as error:

2244

logger.warning("GnuTLS bye failed",

2245

exc_info=error)

1317

2246

1318

2247

@staticmethod

1319

2248

def peer_certificate(session):

1320

2249

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

1321

2250

# If not an OpenPGP certificate...

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

2251

if (gnutls.certificate_type_get(session._c_object)

2252

!= gnutls.CRT_OPENPGP):

2253

# ...return invalid data

2254

return b""

1327

2255

list_size = ctypes.c_uint(1)

1328

cert_list = (gnutls.library.functions

1329

.gnutls_certificate_get_peers

2256

cert_list = (gnutls.certificate_get_peers

1330

2257

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

1331

2258

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

1332

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

1333

" certificate")

2259

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

1334

2260

if list_size.value == 0:

1335

2261

return None

1336

2262

cert = cert_list[0]

1340

2266

def fingerprint(openpgp):

1341

2267

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1342

2268

# New GnuTLS "datum" with the OpenPGP public key

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))))

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)))

1348

2273

# New empty GnuTLS certificate

1349

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1350

(gnutls.library.functions

1351

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2274

crt = gnutls.openpgp_crt_t()

2275

gnutls.openpgp_crt_init(ctypes.byref(crt))

1352

2276

# Import the OpenPGP public key into the certificate

1353

(gnutls.library.functions

1354

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

1355

gnutls.library.constants

1356

.GNUTLS_OPENPGP_FMT_RAW))

2277

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

2278

gnutls.OPENPGP_FMT_RAW)

1357

2279

# Verify the self signature in the key

1358

2280

crtverify = ctypes.c_uint()

1359

(gnutls.library.functions

1360

.gnutls_openpgp_crt_verify_self(crt, 0,

1361

ctypes.byref(crtverify)))

2281

gnutls.openpgp_crt_verify_self(crt, 0,

2282

ctypes.byref(crtverify))

1362

2283

if crtverify.value != 0:

1363

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1364

raise (gnutls.errors.CertificateSecurityError

1365

("Verify failed"))

2284

gnutls.openpgp_crt_deinit(crt)

2285

raise gnutls.CertificateSecurityError("Verify failed")

1366

2286

# New buffer for the fingerprint

1367

2287

buf = ctypes.create_string_buffer(20)

1368

2288

buf_len = ctypes.c_size_t()

1369

2289

# Get the fingerprint from the certificate into the buffer

1370

(gnutls.library.functions

1371

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

1372

ctypes.byref(buf_len)))

2290

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

2291

ctypes.byref(buf_len))

1373

2292

# Deinit the certificate

1374

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2293

gnutls.openpgp_crt_deinit(crt)

1375

2294

# Convert the buffer to a Python bytestring

1376

2295

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

1377

2296

# Convert the bytestring to hexadecimal notation

1378

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

2297

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

1379

2298

return hex_fpr

1380

2299

1381

2300

1382

2301

class MultiprocessingMixIn(object):

1383

2302

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

2303

1384

2304

def sub_process_main(self, request, address):

1385

2305

try:

1386

2306

self.finish_request(request, address)

1387

except:

2307

except Exception:

1388

2308

self.handle_error(request, address)

1389

2309

self.close_request(request)

1390

2310

1391

2311

def process_request(self, request, address):

1392

2312

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

1393

multiprocessing.Process(target = self.sub_process_main,

1394

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

2313

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

2314

args = (request, address))

2315

proc.start()

2316

return proc

2317

1395

2318

1396

2319

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1397

2320

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

2321

1398

2322

def process_request(self, request, client_address):

1399

2323

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

1400

2324

1401

2325

This function creates a new pipe in self.pipe

1402

2326

"""

1403

2327

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1404

1405

super(MultiprocessingMixInWithPipe,

1406

self).process_request(request, client_address)

2328

2329

proc = MultiprocessingMixIn.process_request(self, request,

2330

client_address)

1407

2331

self.child_pipe.close()

1408

self.add_pipe(parent_pipe)

1409

1410

def add_pipe(self, parent_pipe):

2332

self.add_pipe(parent_pipe, proc)

2333

2334

def add_pipe(self, parent_pipe, proc):

1411

2335

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

1412

raise NotImplementedError

2336

raise NotImplementedError()

2337

1413

2338

1414

2339

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1415

2340

socketserver.TCPServer, object):

1420

2345

interface: None or a network interface name (string)

1421

2346

use_ipv6: Boolean; to use IPv6 or not

1422

2347

"""

2348

1423

2349

def __init__(self, server_address, RequestHandlerClass,

1424

interface=None, use_ipv6=True):

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

"""

1425

2356

self.interface = interface

1426

2357

if use_ipv6:

1427

2358

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.

1428

2385

socketserver.TCPServer.__init__(self, server_address,

1429

2386

RequestHandlerClass)

2387

1430

2388

def server_bind(self):

1431

2389

"""This overrides the normal server_bind() function

1432

2390

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

1438

2396

self.interface)

1439

2397

else:

1440

2398

try:

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:

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:

1451

2407

logger.error("SO_BINDTODEVICE not available;"

1452

2408

" cannot bind to interface %s",

1453

2409

self.interface)

2410

elif error.errno == errno.ENODEV:

2411

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

2412

" cannot bind", self.interface)

1454

2413

else:

1455

2414

raise

1456

2415

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

1459

2418

if self.address_family == socket.AF_INET6:

1460

2419

any_address = "::" # in6addr_any

1461

2420

else:

1462

any_address = socket.INADDR_ANY

2421

any_address = "0.0.0.0" # INADDR_ANY

1463

2422

self.server_address = (any_address,

1464

2423

self.server_address[1])

1465

2424

elif not self.server_address[1]:

1466

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

1467

0)

2425

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

1468

2426

# if self.interface:

1469

2427

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

1470

2428

# 0, # port

1484

2442

1485

2443

Assumes a gobject.MainLoop event loop.

1486

2444

"""

2445

1487

2446

def __init__(self, server_address, RequestHandlerClass,

1488

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

1489

gnutls_priority=None, use_dbus=True):

2447

interface=None,

2448

use_ipv6=True,

2449

clients=None,

2450

gnutls_priority=None,

2451

use_dbus=True,

2452

socketfd=None):

1490

2453

self.enabled = False

1491

2454

self.clients = clients

1492

2455

if self.clients is None:

1493

self.clients = set()

2456

self.clients = {}

1494

2457

self.use_dbus = use_dbus

1495

2458

self.gnutls_priority = gnutls_priority

1496

2459

IPv6_TCPServer.__init__(self, server_address,

1497

2460

RequestHandlerClass,

1498

2461

interface = interface,

1499

use_ipv6 = use_ipv6)

2462

use_ipv6 = use_ipv6,

2463

socketfd = socketfd)

2464

1500

2465

def server_activate(self):

1501

2466

if self.enabled:

1502

2467

return socketserver.TCPServer.server_activate(self)

2468

1503

2469

def enable(self):

1504

2470

self.enabled = True

1505

def add_pipe(self, parent_pipe):

2471

2472

def add_pipe(self, parent_pipe, proc):

1506

2473

# Call "handle_ipc" for both data and EOF events

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,

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,

1513

2484

client_object=None):

1514

condition_names = {

1515

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

1516

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

1517

# blocking).

1518

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

1519

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

1520

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

1521

# broken, usually for pipes and

1522

# sockets).

1523

}

1524

conditions_string = ' | '.join(name

1525

for cond, name in

1526

condition_names.iteritems()

1527

if cond & condition)

1528

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

1529

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

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()

1530

2489

return False

1531

2490

1532

2491

# Read a request from the child

1537

2496

fpr = request[1]

1538

2497

address = request[2]

1539

2498

1540

for c in self.clients:

2499

for c in self.clients.itervalues():

1541

2500

if c.fingerprint == fpr:

1542

2501

client = c

1543

2502

break

1544

2503

else:

1545

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

1546

"dress: %s", fpr, address)

2504

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

2505

"dress: %s", fpr, address)

1547

2506

if self.use_dbus:

1548

2507

# Emit D-Bus signal

1549

mandos_dbus_service.ClientNotFound(fpr, address[0])

2508

mandos_dbus_service.ClientNotFound(fpr,

2509

address[0])

1550

2510

parent_pipe.send(False)

1551

2511

return False

1552

2512

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))

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))

1558

2520

parent_pipe.send(True)

1559

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

2521

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

2522

# same fileno

1560

2523

return False

1561

2524

if command == 'funcall':

1562

2525

funcname = request[1]

1563

2526

args = request[2]

1564

2527

kwargs = request[3]

1565

2528

1566

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

1567

2529

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

2530

funcname)(*args,

2531

**kwargs)))

2532

1568

2533

if command == 'getattr':

1569

2534

attrname = request[1]

1570

if callable(client_object.__getattribute__(attrname)):

1571

parent_pipe.send(('function',))

2535

if isinstance(client_object.__getattribute__(attrname),

2536

collections.Callable):

2537

parent_pipe.send(('function', ))

1572

2538

else:

1573

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

2539

parent_pipe.send((

2540

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

1574

2541

1575

2542

if command == 'setattr':

1576

2543

attrname = request[1]

1577

2544

value = request[2]

1578

2545

setattr(client_object, attrname, value)

1579

2546

1580

2547

return True

1581

2548

1582

2549

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

1583

2646

def string_to_delta(interval):

1584

2647

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

1585

2648

1596

2659

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

1597

2660

datetime.timedelta(0, 330)

1598

2661

"""

2662

2663

try:

2664

return rfc3339_duration_to_delta(interval)

2665

except ValueError:

2666

pass

2667

1599

2668

timevalue = datetime.timedelta(0)

1600

2669

for s in interval.split():

1601

2670

try:

1602

suffix = unicode(s[-1])

2671

suffix = s[-1]

1603

2672

value = int(s[:-1])

1604

2673

if suffix == "d":

1605

2674

delta = datetime.timedelta(value)

1612

2681

elif suffix == "w":

1613

2682

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

1614

2683

else:

1615

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

1616

except (ValueError, IndexError), e:

2684

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

2685

except IndexError as e:

1617

2686

raise ValueError(*(e.args))

1618

2687

timevalue += delta

1619

2688

return timevalue

1620

2689

1621

2690

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

1646

2691

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

1647

2692

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

1648

2693

1656

2701

sys.exit()

1657

2702

if not noclose:

1658

2703

# Close all standard open file descriptors

1659

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

2704

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

1660

2705

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

1661

2706

raise OSError(errno.ENODEV,

1662

"%s not a character device"

1663

% os.path.devnull)

2707

"{} not a character device"

2708

.format(os.devnull))

1664

2709

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

1665

2710

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

1666

2711

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

1673

2718

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

1674

2719

# Parsing of options, both command line and config file

1675

2720

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]

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()

1704

2767

1705

2768

if options.check:

1706

2769

import doctest

1707

doctest.testmod()

1708

sys.exit()

2770

fail_count, test_count = doctest.testmod()

2771

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

1709

2772

1710

2773

# Default values for config file for server-global settings

1711

2774

server_defaults = { "interface": "",

1713

2776

"port": "",

1714

2777

"debug": "False",

1715

2778

"priority":

1716

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

2779

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

2780

":+SIGN-DSA-SHA256",

1717

2781

"servicename": "Mandos",

1718

2782

"use_dbus": "True",

1719

2783

"use_ipv6": "True",

1720

2784

"debuglevel": "",

1721

}

2785

"restore": "True",

2786

"socket": "",

2787

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

2788

"foreground": "False",

2789

"zeroconf": "True",

2790

}

1722

2791

1723

2792

# Parse config file for server-global settings

1724

2793

server_config = configparser.SafeConfigParser(server_defaults)

1725

2794

del server_defaults

1726

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

1727

"mandos.conf"))

2795

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

1728

2796

# Convert the SafeConfigParser object to a dict

1729

2797

server_settings = server_config.defaults()

1730

2798

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

1731

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

2799

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

1732

2800

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

1733

2801

option)

1734

2802

if server_settings["port"]:

1735

2803

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

1736

2804

"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"])

1737

2814

del server_config

1738

2815

1739

2816

# Override the settings from the config file with command line

1740

2817

# options, if set.

1741

2818

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

1742

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

1743

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

2819

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

2820

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

2821

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

1744

2822

value = getattr(options, option)

1745

2823

if value is not None:

1746

2824

server_settings[option] = value

1747

2825

del options

1748

2826

# Force all strings to be unicode

1749

2827

for option in server_settings.keys():

1750

if type(server_settings[option]) is str:

1751

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

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

1752

2838

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

1753

2839

1754

2840

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

1755

2841

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

1756

2847

# For convenience

1757

2848

debug = server_settings["debug"]

1758

2849

debuglevel = server_settings["debuglevel"]

1759

2850

use_dbus = server_settings["use_dbus"]

1760

2851

use_ipv6 = server_settings["use_ipv6"]

1761

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

1762

2866

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

1763

syslogger.setFormatter(logging.Formatter

1764

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

1765

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

1766

% server_settings["servicename"]))

2867

syslogger.setFormatter(

2868

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

2869

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

2870

server_settings["servicename"])))

1767

2871

1768

2872

# Parse config file with clients

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)

2873

client_config = configparser.SafeConfigParser(Client

2874

.client_defaults)

1777

2875

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

1778

2876

"clients.conf"))

1779

2877

1780

2878

global mandos_dbus_service

1781

2879

mandos_dbus_service = None

1782

2880

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"

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

1794

2897

try:

1795

pidfile = open(pidfilename, "w")

1796

except IOError:

1797

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

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)

1798

2902

1799

try:

1800

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

1801

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

1802

except KeyError:

2903

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

1803

2904

try:

1804

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

1805

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

2905

uid = pwd.getpwnam(name).pw_uid

2906

gid = pwd.getpwnam(name).pw_gid

2907

break

1806

2908

except KeyError:

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

2909

continue

2910

else:

2911

uid = 65534

2912

gid = 65534

1813

2913

try:

1814

2914

os.setgid(gid)

1815

2915

os.setuid(uid)

1816

except OSError, error:

1817

if error[0] != errno.EPERM:

1818

raise error

2916

except OSError as error:

2917

if error.errno != errno.EPERM:

2918

raise

1819

2919

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

1828

2920

if debug:

1829

2921

# Enable all possible GnuTLS debugging

1830

2922

1831

2923

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

1832

2924

# - GnuTLS manual

1833

gnutls.library.functions.gnutls_global_set_log_level(11)

2925

gnutls.global_set_log_level(11)

1834

2926

1835

@gnutls.library.types.gnutls_log_func

2927

@gnutls.log_func

1836

2928

def debug_gnutls(level, string):

1837

2929

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

1838

2930

1839

(gnutls.library.functions

1840

.gnutls_global_set_log_function(debug_gnutls))

2931

gnutls.global_set_log_function(debug_gnutls)

1841

2932

1842

2933

# Redirect stdin so all checkers get /dev/null

1843

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

2934

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

1844

2935

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

1845

2936

if null > 2:

1846

2937

os.close(null)

1847

else:

1848

# No console logging

1849

logger.removeHandler(console)

1850

2938

1851

2939

# Need to fork before connecting to D-Bus

1852

if not debug:

2940

if not foreground:

1853

2941

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

1854

2942

daemon()

1855

2943

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

1856

2948

global main_loop

1857

2949

# From the Avahi example code

1858

DBusGMainLoop(set_as_default=True )

2950

DBusGMainLoop(set_as_default=True)

1859

2951

main_loop = gobject.MainLoop()

1860

2952

bus = dbus.SystemBus()

1861

2953

# End of Avahi example code

1862

2954

if use_dbus:

1863

2955

try:

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")

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)

1868

2964

use_dbus = False

1869

2965

server_settings["use_dbus"] = False

1870

2966

tcp_server.use_dbus = False

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"])))

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"))

1878

2977

1879

2978

global multiprocessing_manager

1880

2979

multiprocessing_manager = multiprocessing.Manager()

1882

2981

client_class = Client

1883

2982

if use_dbus:

1884

2983

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

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):

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))

1892

3068

try:

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()))

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

1902

3094

if not tcp_server.clients:

1903

3095

logger.warning("No clients defined")

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

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

1917

3107

del pidfilename

1918

1919

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

1920

3108

1921

3109

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

1922

3110

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

1923

3111

1924

3112

if use_dbus:

1925

class MandosDBusService(dbus.service.Object):

3113

3114

@alternate_dbus_interfaces(

3115

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

3116

class MandosDBusService(DBusObjectWithObjectManager):

1926

3117

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

3118

1927

3119

def __init__(self):

1928

3120

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

1929

_interface = "se.bsnet.fukt.Mandos"

3121

3122

_interface = "se.recompile.Mandos"

1930

3123

1931

3124

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

1932

3125

def ClientAdded(self, objpath):

1938

3131

"D-Bus signal"

1939

3132

pass

1940

3133

3134

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

3135

"true"})

1941

3136

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

1942

3137

def ClientRemoved(self, objpath, name):

1943

3138

"D-Bus signal"

1944

3139

pass

1945

3140

3141

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

3142

"true"})

1946

3143

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

1947

3144

def GetAllClients(self):

1948

3145

"D-Bus method"

1949

return dbus.Array(c.dbus_object_path

1950

for c in tcp_server.clients)

3146

return dbus.Array(c.dbus_object_path for c in

3147

tcp_server.clients.itervalues())

1951

3148

3149

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

3150

"true"})

1952

3151

@dbus.service.method(_interface,

1953

3152

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

1954

3153

def GetAllClientsWithProperties(self):

1955

3154

"D-Bus method"

1956

3155

return dbus.Dictionary(

1957

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

1958

for c in tcp_server.clients),

3156

{ c.dbus_object_path: c.GetAll(

3157

"se.recompile.Mandos.Client")

3158

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

1959

3159

signature="oa{sv}")

1960

3160

1961

3161

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

1962

3162

def RemoveClient(self, object_path):

1963

3163

"D-Bus method"

1964

for c in tcp_server.clients:

3164

for c in tcp_server.clients.itervalues():

1965

3165

if c.dbus_object_path == object_path:

1966

tcp_server.clients.remove(c)

3166

del tcp_server.clients[c.name]

1967

3167

c.remove_from_connection()

1968

# Don't signal anything except ClientRemoved

3168

# Don't signal the disabling

1969

3169

c.disable(quiet=True)

1970

# Emit D-Bus signal

1971

self.ClientRemoved(object_path, c.name)

3170

# Emit D-Bus signal for removal

3171

self.client_removed_signal(c)

1972

3172

return

1973

3173

raise KeyError(object_path)

1974

3174

1975

3175

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)

1976

3212

1977

3213

mandos_dbus_service = MandosDBusService()

1978

3214

1979

3215

def cleanup():

1980

3216

"Cleanup function; run on exit"

1981

service.cleanup()

1982

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

1983

3278

while tcp_server.clients:

1984

client = tcp_server.clients.pop()

3279

name, client = tcp_server.clients.popitem()

1985

3280

if use_dbus:

1986

3281

client.remove_from_connection()

1987

client.disable_hook = None

1988

# Don't signal anything except ClientRemoved

3282

# Don't signal the disabling

1989

3283

client.disable(quiet=True)

3284

# Emit D-Bus signal for removal

1990

3285

if use_dbus:

1991

# Emit D-Bus signal

1992

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

1993

client.name)

3286

mandos_dbus_service.client_removed_signal(client)

3287

client_settings.clear()

1994

3288

1995

3289

atexit.register(cleanup)

1996

3290

1997

for client in tcp_server.clients:

3291

for client in tcp_server.clients.itervalues():

1998

3292

if use_dbus:

1999

# Emit D-Bus signal

2000

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2001

client.enable()

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()

2002

3298

2003

3299

tcp_server.enable()

2004

3300

tcp_server.server_activate()

2005

3301

2006

3302

# Find out what port we got

2007

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

3303

if zeroconf:

3304

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

2008

3305

if use_ipv6:

2009

3306

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

2010

" flowinfo %d, scope_id %d"

2011

% tcp_server.socket.getsockname())

3307

" flowinfo %d, scope_id %d",

3308

*tcp_server.socket.getsockname())

2012

3309

else: # IPv4

2013

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

2014

% tcp_server.socket.getsockname())

3310

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

3311

*tcp_server.socket.getsockname())

2015

3312

2016

3313

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

2017

3314

2018

3315

try:

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

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

2027

3325

2028

3326

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

2029

3327

lambda *args, **kwargs:

2032

3330

2033

3331

logger.debug("Starting main loop")

2034

3332

main_loop.run()

2035

except AvahiError, error:

2036

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

3333

except AvahiError as error:

3334

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

2037

3335

cleanup()

2038

3336

sys.exit(1)

2039

3337

except KeyboardInterrupt:

2044

3342

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

2045

3343

cleanup()

2046

3344

3345

2047

3346

if __name__ == '__main__':

2048

3347

main()