/mandos/release : revision 237.7.309

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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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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 argparse

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import datetime

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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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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.4.1"

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version = "1.6.9"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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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 = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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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(str("16s16x"),

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interface))

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

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ifreq[16:20])[0]

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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(level=logging.WARNING):

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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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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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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 CryptoError(Exception):

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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 Crypto(object):

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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.gnupg = GnuPGInterface.GnuPG()

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self.tempdir = tempfile.mkdtemp(prefix="mandos-")

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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self.gnupg.options.extra_args.extend(['--force-mdc',

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'--quiet'])

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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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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 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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return b"mandos" + binascii.hexlify(password)

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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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self.gnupg.passphrase = self.password_encode(password)

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with open(os.devnull) as devnull:

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try:

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proc = self.gnupg.run(['--symmetric'],

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create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

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with contextlib.closing(proc.handles['stdin']) as f:

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f.write(data)

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with contextlib.closing(proc.handles['stdout']) as f:

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise CryptoError(e)

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self.gnupg.passphrase = None

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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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self.gnupg.passphrase = self.password_encode(password)

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with open(os.devnull) as devnull:

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try:

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proc = self.gnupg.run(['--decrypt'],

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create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

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with contextlib.closing(proc.handles['stdin'] ) as f:

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f.write(data)

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with contextlib.closing(proc.handles['stdout']) as f:

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise CryptoError(e)

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self.gnupg.passphrase = None

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

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self.value = value

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

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def __unicode__(self):

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return unicode(repr(self.value))

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

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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.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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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

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.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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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 as 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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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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"""Derived from the Avahi example code"""

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

312

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

318

364

self.rename()

319

365

elif state == avahi.ENTRY_GROUP_FAILURE:

320

366

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

321

unicode(error))

322

raise AvahiGroupError("State changed: %s"

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% unicode(error))

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str(error))

368

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

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def cleanup(self):

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

326

372

if self.group is not None:

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377

pass

332

378

self.group = None

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self.remove()

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

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

336

383

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

337

bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

342

avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

384

bad_states = {

385

avahi.SERVER_INVALID: "Zeroconf server invalid",

386

avahi.SERVER_REGISTERING: None,

387

avahi.SERVER_COLLISION: "Zeroconf server name collision",

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avahi.SERVER_FAILURE: "Zeroconf server failure",

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}

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if state in bad_states:

345

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if bad_states[state] is not None:

346

392

if error is None:

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401

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

356

402

else:

357

403

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

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405

def activate(self):

359

406

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

360

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if self.server is None:

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411

follow_name_owner_changes=True),

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412

avahi.DBUS_INTERFACE_SERVER)

366

413

self.server.connect_to_signal("StateChanged",

367

self.server_state_changed)

414

self.server_state_changed)

368

415

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

369

416

417

370

418

class AvahiServiceToSyslog(AvahiService):

371

def rename(self):

419

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

372

420

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

373

ret = AvahiService.rename(self)

374

syslogger.setFormatter(logging.Formatter

375

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

376

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

377

% self.name))

421

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

422

syslogger.setFormatter(logging.Formatter(

423

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

424

.format(self.name)))

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425

return ret

379

426

380

def _timedelta_to_milliseconds(td):

381

"Convert a datetime.timedelta() to milliseconds"

382

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

383

+ (td.seconds * 1000)

384

+ (td.microseconds // 1000))

385

427

def call_pipe(connection, # : multiprocessing.Connection

428

func, *args, **kwargs):

429

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

430

431

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

432

return value on the provided multiprocessing.Connection.

433

"""

434

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

435

connection.close()

436

386

437

class Client(object):

387

438

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

388

439

389

440

Attributes:

390

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

441

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

391

442

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

392

443

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

393

444

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

411

462

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

412

463

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

413

464

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

414

415

465

last_checker_status: integer between 0 and 255 reflecting exit

416

466

status of last checker. -1 reflects crashed

417

checker, or None.

467

checker, -2 means no checker completed yet.

468

last_checker_signal: The signal which killed the last checker, if

469

last_checker_status is -1

418

470

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

419

471

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

420

472

D-Bus identifiers

421

473

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

422

474

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

423

475

until this client is disabled

424

extended_timeout: extra long timeout when password has been sent

476

extended_timeout: extra long timeout when secret has been sent

425

477

runtime_expansions: Allowed attributes for runtime expansion.

426

478

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

427

479

disabled, or None

480

server_settings: The server_settings dict from main()

428

481

"""

429

482

430

483

runtime_expansions = ("approval_delay", "approval_duration",

431

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

432

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

484

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

485

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

486

"last_approval_request", "last_checked_ok",

433

487

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

434

435

def timeout_milliseconds(self):

436

"Return the 'timeout' attribute in milliseconds"

437

return _timedelta_to_milliseconds(self.timeout)

438

439

def extended_timeout_milliseconds(self):

440

"Return the 'extended_timeout' attribute in milliseconds"

441

return _timedelta_to_milliseconds(self.extended_timeout)

442

443

def interval_milliseconds(self):

444

"Return the 'interval' attribute in milliseconds"

445

return _timedelta_to_milliseconds(self.interval)

446

447

def approval_delay_milliseconds(self):

448

return _timedelta_to_milliseconds(self.approval_delay)

449

450

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

451

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

452

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

453

attribute."""

488

client_defaults = {

489

"timeout": "PT5M",

490

"extended_timeout": "PT15M",

491

"interval": "PT2M",

492

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

493

"host": "",

494

"approval_delay": "PT0S",

495

"approval_duration": "PT1S",

496

"approved_by_default": "True",

497

"enabled": "True",

498

}

499

500

@staticmethod

501

def config_parser(config):

502

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

503

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

504

with exceptions for any special settings as defined above.

505

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

506

value given the same arguments.

507

"""

508

settings = {}

509

for client_name in config.sections():

510

section = dict(config.items(client_name))

511

client = settings[client_name] = {}

512

513

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

514

# Reformat values from string types to Python types

515

client["approved_by_default"] = config.getboolean(

516

client_name, "approved_by_default")

517

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

518

"enabled")

519

520

# Uppercase and remove spaces from fingerprint for later

521

# comparison purposes with return value from the

522

# fingerprint() function

523

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

524

.replace(" ", ""))

525

if "secret" in section:

526

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

527

elif "secfile" in section:

528

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

529

(section["secfile"])),

530

"rb") as secfile:

531

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

532

else:

533

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

534

.format(section))

535

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

536

client["extended_timeout"] = string_to_delta(

537

section["extended_timeout"])

538

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

539

client["approval_delay"] = string_to_delta(

540

section["approval_delay"])

541

client["approval_duration"] = string_to_delta(

542

section["approval_duration"])

543

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

544

client["last_approval_request"] = None

545

client["last_checked_ok"] = None

546

client["last_checker_status"] = -2

547

548

return settings

549

550

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

454

551

self.name = name

455

if config is None:

456

config = {}

552

if server_settings is None:

553

server_settings = {}

554

self.server_settings = server_settings

555

# adding all client settings

556

for setting, value in settings.items():

557

setattr(self, setting, value)

558

559

if self.enabled:

560

if not hasattr(self, "last_enabled"):

561

self.last_enabled = datetime.datetime.utcnow()

562

if not hasattr(self, "expires"):

563

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

564

+ self.timeout)

565

else:

566

self.last_enabled = None

567

self.expires = None

568

457

569

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

458

# Uppercase and remove spaces from fingerprint for later

459

# comparison purposes with return value from the fingerprint()

460

# function

461

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

462

.replace(" ", ""))

463

570

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

464

if "secret" in config:

465

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

466

elif "secfile" in config:

467

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

468

(config["secfile"])),

469

"rb") as secfile:

470

self.secret = secfile.read()

471

else:

472

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

473

% self.name)

474

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

475

self.created = datetime.datetime.utcnow()

476

self.enabled = config.get("enabled", True)

477

self.last_approval_request = None

478

if self.enabled:

479

self.last_enabled = datetime.datetime.utcnow()

480

else:

481

self.last_enabled = None

482

self.last_checked_ok = None

483

self.last_checker_status = None

484

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

485

self.extended_timeout = string_to_delta(config

486

["extended_timeout"])

487

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

571

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

572

datetime.datetime.utcnow())

573

574

# attributes specific for this server instance

488

575

self.checker = None

489

576

self.checker_initiator_tag = None

490

577

self.disable_initiator_tag = None

491

if self.enabled:

492

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

493

else:

494

self.expires = None

495

578

self.checker_callback_tag = None

496

self.checker_command = config["checker"]

497

579

self.current_checker_command = None

498

self._approved = None

499

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

500

True)

580

self.approved = None

501

581

self.approvals_pending = 0

502

self.approval_delay = string_to_delta(

503

config["approval_delay"])

504

self.approval_duration = string_to_delta(

505

config["approval_duration"])

506

self.changedstate = (multiprocessing_manager

507

.Condition(multiprocessing_manager

508

.Lock()))

509

self.client_structure = [attr for attr in

510

self.__dict__.iterkeys()

582

self.changedstate = multiprocessing_manager.Condition(

583

multiprocessing_manager.Lock())

584

self.client_structure = [attr

585

for attr in self.__dict__.iterkeys()

511

586

if not attr.startswith("_")]

512

587

self.client_structure.append("client_structure")

513

588

514

for name, t in inspect.getmembers(type(self),

515

lambda obj:

516

isinstance(obj,

517

property)):

589

for name, t in inspect.getmembers(

590

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

518

591

if not name.startswith("_"):

519

592

self.client_structure.append(name)

520

593

528

601

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

529

602

# Already enabled

530

603

return

531

self.send_changedstate()

532

604

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

533

605

self.enabled = True

534

606

self.last_enabled = datetime.datetime.utcnow()

535

607

self.init_checker()

608

self.send_changedstate()

536

609

537

610

def disable(self, quiet=True):

538

611

"""Disable this client."""

539

612

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

540

613

return False

541

614

if not quiet:

542

self.send_changedstate()

543

if not quiet:

544

615

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

545

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

616

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

546

617

gobject.source_remove(self.disable_initiator_tag)

547

618

self.disable_initiator_tag = None

548

619

self.expires = None

549

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

620

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

550

621

gobject.source_remove(self.checker_initiator_tag)

551

622

self.checker_initiator_tag = None

552

623

self.stop_checker()

553

624

self.enabled = False

625

if not quiet:

626

self.send_changedstate()

554

627

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

555

628

return False

556

629

560

633

def init_checker(self):

561

634

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

562

635

# and every interval from then on.

563

self.checker_initiator_tag = (gobject.timeout_add

564

(self.interval_milliseconds(),

565

self.start_checker))

636

if self.checker_initiator_tag is not None:

637

gobject.source_remove(self.checker_initiator_tag)

638

self.checker_initiator_tag = gobject.timeout_add(

639

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

640

self.start_checker)

566

641

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

567

self.disable_initiator_tag = (gobject.timeout_add

568

(self.timeout_milliseconds(),

569

self.disable))

642

if self.disable_initiator_tag is not None:

643

gobject.source_remove(self.disable_initiator_tag)

644

self.disable_initiator_tag = gobject.timeout_add(

645

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

570

646

# Also start a new checker *right now*.

571

647

self.start_checker()

572

648

573

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

649

def checker_callback(self, source, condition, connection,

650

command):

574

651

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

575

652

self.checker_callback_tag = None

576

653

self.checker = None

577

if os.WIFEXITED(condition):

578

self.last_checker_status = os.WEXITSTATUS(condition)

654

# Read return code from connection (see call_pipe)

655

returncode = connection.recv()

656

connection.close()

657

658

if returncode >= 0:

659

self.last_checker_status = returncode

660

self.last_checker_signal = None

579

661

if self.last_checker_status == 0:

580

662

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

581

663

vars(self))

582

664

self.checked_ok()

583

665

else:

584

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

585

vars(self))

666

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

586

667

else:

587

668

self.last_checker_status = -1

669

self.last_checker_signal = -returncode

588

670

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

589

671

vars(self))

590

591

def checked_ok(self, timeout=None):

592

"""Bump up the timeout for this client.

593

594

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

595

alive and well.

596

"""

672

return False

673

674

def checked_ok(self):

675

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

676

self.last_checked_ok = datetime.datetime.utcnow()

677

self.last_checker_status = 0

678

self.last_checker_signal = None

679

self.bump_timeout()

680

681

def bump_timeout(self, timeout=None):

682

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

597

683

if timeout is None:

598

684

timeout = self.timeout

599

self.last_checked_ok = datetime.datetime.utcnow()

600

685

if self.disable_initiator_tag is not None:

601

686

gobject.source_remove(self.disable_initiator_tag)

687

self.disable_initiator_tag = None

602

688

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

603

self.disable_initiator_tag = (gobject.timeout_add

604

(_timedelta_to_milliseconds

605

(timeout), self.disable))

689

self.disable_initiator_tag = gobject.timeout_add(

690

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

606

691

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

607

692

608

693

def need_approval(self):

614

699

If a checker already exists, leave it running and do

615

700

nothing."""

616

701

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

617

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

618

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

619

# client would inevitably timeout, since no checker would get

620

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

702

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

703

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

704

# would inevitably timeout, since no checker would get a

705

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

621

706

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

622

707

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

623

708

# should be.

624

709

625

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

626

try:

627

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

628

except (AttributeError, OSError) as error:

629

if (isinstance(error, OSError)

630

and error.errno != errno.ECHILD):

631

raise error

632

else:

633

if pid:

634

logger.warning("Checker was a zombie")

635

gobject.source_remove(self.checker_callback_tag)

636

self.checker_callback(pid, status,

637

self.current_checker_command)

710

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

711

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

712

self.checker.join()

713

self.checker = None

638

714

# Start a new checker if needed

639

715

if self.checker is None:

716

# Escape attributes for the shell

717

escaped_attrs = {

718

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

719

for attr in self.runtime_expansions }

640

720

try:

641

# In case checker_command has exactly one % operator

642

command = self.checker_command % self.host

643

except TypeError:

644

# Escape attributes for the shell

645

escaped_attrs = dict(

646

(attr,

647

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

648

errors=

649

'replace')))

650

for attr in

651

self.runtime_expansions)

652

653

try:

654

command = self.checker_command % escaped_attrs

655

except TypeError as error:

656

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

657

' %s', self.checker_command, error)

658

return True # Try again later

721

command = self.checker_command % escaped_attrs

722

except TypeError as error:

723

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

724

self.checker_command,

725

exc_info=error)

726

return True # Try again later

659

727

self.current_checker_command = command

660

try:

661

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

662

command, self.name)

663

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

664

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

665

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

666

# always replaced by /dev/null.)

667

self.checker = subprocess.Popen(command,

668

close_fds=True,

669

shell=True, cwd="/")

670

self.checker_callback_tag = (gobject.child_watch_add

671

(self.checker.pid,

672

self.checker_callback,

673

data=command))

674

# The checker may have completed before the gobject

675

# watch was added. Check for this.

676

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

677

if pid:

678

gobject.source_remove(self.checker_callback_tag)

679

self.checker_callback(pid, status, command)

680

except OSError as error:

681

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

682

error)

728

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

729

self.name)

730

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

731

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

732

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

733

# always replaced by /dev/null.)

734

# The exception is when not debugging but nevertheless

735

# running in the foreground; use the previously

736

# created wnull.

737

popen_args = { "close_fds": True,

738

"shell": True,

739

"cwd": "/" }

740

if (not self.server_settings["debug"]

741

and self.server_settings["foreground"]):

742

popen_args.update({"stdout": wnull,

743

"stderr": wnull })

744

pipe = multiprocessing.Pipe(duplex = False)

745

self.checker = multiprocessing.Process(

746

target = call_pipe,

747

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

748

kwargs = popen_args)

749

self.checker.start()

750

self.checker_callback_tag = gobject.io_add_watch(

751

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

752

self.checker_callback, pipe[0], command)

683

753

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

684

754

return True

685

755

691

761

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

692

762

return

693

763

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

694

try:

695

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

696

#time.sleep(0.5)

697

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

698

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

699

except OSError as error:

700

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

701

raise

764

self.checker.terminate()

702

765

self.checker = None

703

766

704

767

705

def dbus_service_property(dbus_interface, signature="v",

706

access="readwrite", byte_arrays=False):

768

def dbus_service_property(dbus_interface,

769

signature="v",

770

access="readwrite",

771

byte_arrays=False):

707

772

"""Decorators for marking methods of a DBusObjectWithProperties to

708

773

become properties on the D-Bus.

709

774

718

783

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

719

784

if byte_arrays and signature != "ay":

720

785

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

721

" signature %r" % signature)

786

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

787

722

788

def decorator(func):

723

789

func._dbus_is_property = True

724

790

func._dbus_interface = dbus_interface

729

795

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

730

796

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

731

797

return func

798

799

return decorator

800

801

802

def dbus_interface_annotations(dbus_interface):

803

"""Decorator for marking functions returning interface annotations

804

805

Usage:

806

807

@dbus_interface_annotations("org.example.Interface")

808

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

809

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

810

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

811

"false"}

812

"""

813

814

def decorator(func):

815

func._dbus_is_interface = True

816

func._dbus_interface = dbus_interface

817

func._dbus_name = dbus_interface

818

return func

819

820

return decorator

821

822

823

def dbus_annotations(annotations):

824

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

825

Usage:

826

827

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

828

"org.freedesktop.DBus.Property."

829

"EmitsChangedSignal": "false"})

830

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

831

access="r")

832

def Property_dbus_property(self):

833

return dbus.Boolean(False)

834

"""

835

836

def decorator(func):

837

func._dbus_annotations = annotations

838

return func

839

732

840

return decorator

733

841

734

842

735

843

class DBusPropertyException(dbus.exceptions.DBusException):

736

844

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

737

845

"""

738

def __unicode__(self):

739

return unicode(str(self))

846

pass

740

847

741

848

742

849

class DBusPropertyAccessException(DBusPropertyException):

760

867

"""

761

868

762

869

@staticmethod

763

def _is_dbus_property(obj):

764

return getattr(obj, "_dbus_is_property", False)

870

def _is_dbus_thing(thing):

871

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

872

873

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

874

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

875

"""

876

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

877

False)

765

878

766

def _get_all_dbus_properties(self):

879

def _get_all_dbus_things(self, thing):

767

880

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

768

881

"""

769

return ((prop.__get__(self)._dbus_name, prop.__get__(self))

882

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

883

athing.__get__(self))

770

884

for cls in self.__class__.__mro__

771

for name, prop in

772

inspect.getmembers(cls, self._is_dbus_property))

885

for name, athing in

886

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

773

887

774

888

def _get_dbus_property(self, interface_name, property_name):

775

889

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

776

890

property with the specified name and interface.

777

891

"""

778

for cls in self.__class__.__mro__:

779

for name, value in (inspect.getmembers

780

(cls, self._is_dbus_property)):

892

for cls in self.__class__.__mro__:

893

for name, value in inspect.getmembers(

894

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

781

895

if (value._dbus_name == property_name

782

896

and value._dbus_interface == interface_name):

783

897

return value.__get__(self)

784

898

785

899

# No such property

786

raise DBusPropertyNotFound(self.dbus_object_path + ":"

787

+ interface_name + "."

788

+ property_name)

900

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

901

self.dbus_object_path, interface_name, property_name))

789

902

790

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

903

@dbus.service.method(dbus.PROPERTIES_IFACE,

904

in_signature="ss",

791

905

out_signature="v")

792

906

def Get(self, interface_name, property_name):

793

907

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

811

925

# The byte_arrays option is not supported yet on

812

926

# signatures other than "ay".

813

927

if prop._dbus_signature != "ay":

814

raise ValueError

815

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

816

for byte in value))

928

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

929

"'ay' signature {!r}"

930

.format(prop._dbus_signature))

931

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

932

for byte in value))

817

933

prop(value)

818

934

819

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

935

@dbus.service.method(dbus.PROPERTIES_IFACE,

936

in_signature="s",

820

937

out_signature="a{sv}")

821

938

def GetAll(self, interface_name):

822

939

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

825

942

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

826

943

"""

827

944

properties = {}

828

for name, prop in self._get_all_dbus_properties():

945

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

829

946

if (interface_name

830

947

and interface_name != prop._dbus_interface):

831

948

# Interface non-empty but did not match

837

954

if not hasattr(value, "variant_level"):

838

955

properties[name] = value

839

956

continue

840

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

841

value.variant_level+1)

957

properties[name] = type(value)(

958

value, variant_level = value.variant_level + 1)

842

959

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

843

960

961

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

962

def PropertiesChanged(self, interface_name, changed_properties,

963

invalidated_properties):

964

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

965

standard.

966

"""

967

pass

968

844

969

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

845

970

out_signature="s",

846

971

path_keyword='object_path',

847

972

connection_keyword='connection')

848

973

def Introspect(self, object_path, connection):

849

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

974

"""Overloading of standard D-Bus method.

975

976

Inserts property tags and interface annotation tags.

850

977

"""

851

978

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

852

979

connection)

853

980

try:

854

981

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

982

855

983

def make_tag(document, name, prop):

856

984

e = document.createElement("property")

857

985

e.setAttribute("name", name)

858

986

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

859

987

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

860

988

return e

989

861

990

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

991

# Add property tags

862

992

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

863

993

for name, prop

864

in self._get_all_dbus_properties()

994

in self._get_all_dbus_things("property")

865

995

if prop._dbus_interface

866

996

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

867

997

if_tag.appendChild(tag)

998

# Add annotation tags

999

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

1000

for tag in if_tag.getElementsByTagName(typ):

1001

annots = dict()

1002

for name, prop in (self.

1003

_get_all_dbus_things(typ)):

1004

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

1005

and prop._dbus_interface

1006

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

1007

annots.update(getattr(

1008

prop, "_dbus_annotations", {}))

1009

for name, value in annots.items():

1010

ann_tag = document.createElement(

1011

"annotation")

1012

ann_tag.setAttribute("name", name)

1013

ann_tag.setAttribute("value", value)

1014

tag.appendChild(ann_tag)

1015

# Add interface annotation tags

1016

for annotation, value in dict(

1017

itertools.chain.from_iterable(

1018

annotations().items()

1019

for name, annotations

1020

in self._get_all_dbus_things("interface")

1021

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

1022

)).items():

1023

ann_tag = document.createElement("annotation")

1024

ann_tag.setAttribute("name", annotation)

1025

ann_tag.setAttribute("value", value)

1026

if_tag.appendChild(ann_tag)

868

1027

# Add the names to the return values for the

869

1028

# "org.freedesktop.DBus.Properties" methods

870

1029

if (if_tag.getAttribute("name")

885

1044

except (AttributeError, xml.dom.DOMException,

886

1045

xml.parsers.expat.ExpatError) as error:

887

1046

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

888

error)

1047

exc_info=error)

889

1048

return xmlstring

890

1049

891

1050

892

def datetime_to_dbus (dt, variant_level=0):

1051

def datetime_to_dbus(dt, variant_level=0):

893

1052

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

894

1053

if dt is None:

895

1054

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

896

return dbus.String(dt.isoformat(),

897

variant_level=variant_level)

898

899

900

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

901

.__metaclass__):

902

"""Applied to an empty subclass of a D-Bus object, this metaclass

903

will add additional D-Bus attributes matching a certain pattern.

1055

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

1056

1057

1058

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1059

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

1060

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

1061

interface names according to the "alt_interface_names" mapping.

1062

Usage:

1063

1064

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

1065

"net.example.AlternateInterface"})

1066

class SampleDBusObject(dbus.service.Object):

1067

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

1068

def SampleDBusMethod():

1069

pass

1070

1071

The above "SampleDBusMethod" on "SampleDBusObject" will be

1072

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

1073

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

1074

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

1075

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

1076

1077

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

1078

(from DBusObjectWithProperties) and interfaces (from the

1079

dbus_interface_annotations decorator).

904

1080

"""

905

def __new__(mcs, name, bases, attr):

906

# Go through all the base classes which could have D-Bus

907

# methods, signals, or properties in them

908

for base in (b for b in bases

909

if issubclass(b, dbus.service.Object)):

910

# Go though all attributes of the base class

911

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

1081

1082

def wrapper(cls):

1083

for orig_interface_name, alt_interface_name in (

1084

alt_interface_names.items()):

1085

attr = {}

1086

interface_names = set()

1087

# Go though all attributes of the class

1088

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

912

1089

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

913

1090

# with the wrong interface name

914

1091

if (not hasattr(attribute, "_dbus_interface")

915

or not attribute._dbus_interface

916

.startswith("se.recompile.Mandos")):

1092

or not attribute._dbus_interface.startswith(

1093

orig_interface_name)):

917

1094

continue

918

1095

# Create an alternate D-Bus interface name based on

919

1096

# the current name

920

alt_interface = (attribute._dbus_interface

921

.replace("se.recompile.Mandos",

922

"se.bsnet.fukt.Mandos"))

1097

alt_interface = attribute._dbus_interface.replace(

1098

orig_interface_name, alt_interface_name)

1099

interface_names.add(alt_interface)

923

1100

# Is this a D-Bus signal?

924

1101

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

925

# Extract the original non-method function by

926

# black magic

927

nonmethod_func = (dict(

1102

if sys.version_info.major == 2:

1103

# Extract the original non-method undecorated

1104

# function by black magic

1105

nonmethod_func = (dict(

928

1106

zip(attribute.func_code.co_freevars,

929

attribute.__closure__))["func"]

930

.cell_contents)

1107

attribute.__closure__))

1108

["func"].cell_contents)

1109

else:

1110

nonmethod_func = attribute

931

1111

# Create a new, but exactly alike, function

932

1112

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

933

1113

# with the alternate D-Bus interface name

934

new_function = (dbus.service.signal

935

(alt_interface,

936

attribute._dbus_signature)

937

(types.FunctionType(

938

nonmethod_func.func_code,

939

nonmethod_func.func_globals,

940

nonmethod_func.func_name,

941

nonmethod_func.func_defaults,

942

nonmethod_func.func_closure)))

1114

if sys.version_info.major == 2:

1115

new_function = types.FunctionType(

1116

nonmethod_func.func_code,

1117

nonmethod_func.func_globals,

1118

nonmethod_func.func_name,

1119

nonmethod_func.func_defaults,

1120

nonmethod_func.func_closure)

1121

else:

1122

new_function = types.FunctionType(

1123

nonmethod_func.__code__,

1124

nonmethod_func.__globals__,

1125

nonmethod_func.__name__,

1126

nonmethod_func.__defaults__,

1127

nonmethod_func.__closure__)

1128

new_function = (dbus.service.signal(

1129

alt_interface,

1130

attribute._dbus_signature)(new_function))

1131

# Copy annotations, if any

1132

try:

1133

new_function._dbus_annotations = dict(

1134

attribute._dbus_annotations)

1135

except AttributeError:

1136

pass

943

1137

# Define a creator of a function to call both the

944

# old and new functions, so both the old and new

945

# signals gets sent when the function is called

1138

# original and alternate functions, so both the

1139

# original and alternate signals gets sent when

1140

# the function is called

946

1141

def fixscope(func1, func2):

947

1142

"""This function is a scope container to pass

948

1143

func1 and func2 to the "call_both" function

949

1144

outside of its arguments"""

1145

950

1146

def call_both(*args, **kwargs):

951

1147

"""This function will emit two D-Bus

952

1148

signals by calling func1 and func2"""

953

1149

func1(*args, **kwargs)

954

1150

func2(*args, **kwargs)

1151

955

1152

return call_both

956

1153

# Create the "call_both" function and add it to

957

1154

# the class

958

attr[attrname] = fixscope(attribute,

959

new_function)

1155

attr[attrname] = fixscope(attribute, new_function)

960

1156

# Is this a D-Bus method?

961

1157

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

962

1158

# Create a new, but exactly alike, function

963

1159

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

964

1160

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

965

1161

# to the class.

966

attr[attrname] = (dbus.service.method

967

(alt_interface,

968

attribute._dbus_in_signature,

969

attribute._dbus_out_signature)

970

(types.FunctionType

971

(attribute.func_code,

972

attribute.func_globals,

973

attribute.func_name,

974

attribute.func_defaults,

975

attribute.func_closure)))

1162

attr[attrname] = (

1163

dbus.service.method(

1164

alt_interface,

1165

attribute._dbus_in_signature,

1166

attribute._dbus_out_signature)

1167

(types.FunctionType(attribute.func_code,

1168

attribute.func_globals,

1169

attribute.func_name,

1170

attribute.func_defaults,

1171

attribute.func_closure)))

1172

# Copy annotations, if any

1173

try:

1174

attr[attrname]._dbus_annotations = dict(

1175

attribute._dbus_annotations)

1176

except AttributeError:

1177

pass

976

1178

# Is this a D-Bus property?

977

1179

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

978

1180

# Create a new, but exactly alike, function

979

1181

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

980

1182

# property with the alternate D-Bus interface

981

1183

# name. Add it to the class.

982

attr[attrname] = (dbus_service_property

983

(alt_interface,

984

attribute._dbus_signature,

985

attribute._dbus_access,

986

attribute

987

._dbus_get_args_options

988

["byte_arrays"])

989

(types.FunctionType

990

(attribute.func_code,

991

attribute.func_globals,

992

attribute.func_name,

993

attribute.func_defaults,

994

attribute.func_closure)))

995

return type.__new__(mcs, name, bases, attr)

996

997

1184

attr[attrname] = (dbus_service_property(

1185

alt_interface, attribute._dbus_signature,

1186

attribute._dbus_access,

1187

attribute._dbus_get_args_options

1188

["byte_arrays"])

1189

(types.FunctionType(

1190

attribute.func_code,

1191

attribute.func_globals,

1192

attribute.func_name,

1193

attribute.func_defaults,

1194

attribute.func_closure)))

1195

# Copy annotations, if any

1196

try:

1197

attr[attrname]._dbus_annotations = dict(

1198

attribute._dbus_annotations)

1199

except AttributeError:

1200

pass

1201

# Is this a D-Bus interface?

1202

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

1203

# Create a new, but exactly alike, function

1204

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

1205

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

1206

# to the class.

1207

attr[attrname] = (

1208

dbus_interface_annotations(alt_interface)

1209

(types.FunctionType(attribute.func_code,

1210

attribute.func_globals,

1211

attribute.func_name,

1212

attribute.func_defaults,

1213

attribute.func_closure)))

1214

if deprecate:

1215

# Deprecate all alternate interfaces

1216

iname="_AlternateDBusNames_interface_annotation{}"

1217

for interface_name in interface_names:

1218

1219

@dbus_interface_annotations(interface_name)

1220

def func(self):

1221

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

1222

"true" }

1223

# Find an unused name

1224

for aname in (iname.format(i)

1225

for i in itertools.count()):

1226

if aname not in attr:

1227

attr[aname] = func

1228

break

1229

if interface_names:

1230

# Replace the class with a new subclass of it with

1231

# methods, signals, etc. as created above.

1232

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

1233

(cls, ), attr)

1234

return cls

1235

1236

return wrapper

1237

1238

1239

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

1240

"se.bsnet.fukt.Mandos"})

998

1241

class ClientDBus(Client, DBusObjectWithProperties):

999

1242

"""A Client class using D-Bus

1000

1243

1004

1247

"""

1005

1248

1006

1249

runtime_expansions = (Client.runtime_expansions

1007

+ ("dbus_object_path",))

1250

+ ("dbus_object_path", ))

1251

1252

_interface = "se.recompile.Mandos.Client"

1008

1253

1009

1254

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

1010

1255

1011

1256

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

1012

1257

self.bus = bus

1013

1258

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

1014

1015

self._approvals_pending = 0

1016

1259

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

1017

1260

# the D-Bus

1018

client_object_name = unicode(self.name).translate(

1261

client_object_name = str(self.name).translate(

1019

1262

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

1020

1263

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

1021

self.dbus_object_path = (dbus.ObjectPath

1022

("/clients/" + client_object_name))

1264

self.dbus_object_path = dbus.ObjectPath(

1265

"/clients/" + client_object_name)

1023

1266

DBusObjectWithProperties.__init__(self, self.bus,

1024

1267

self.dbus_object_path)

1025

1026

def notifychangeproperty(transform_func,

1027

dbus_name, type_func=lambda x: x,

1028

variant_level=1):

1268

1269

def notifychangeproperty(transform_func, dbus_name,

1270

type_func=lambda x: x,

1271

variant_level=1,

1272

invalidate_only=False,

1273

_interface=_interface):

1029

1274

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

1030

1275

its changes to DBus.

1031

1276

1036

1281

to the D-Bus. Default: no transform

1037

1282

variant_level: D-Bus variant level. Default: 1

1038

1283

"""

1039

attrname = "_{0}".format(dbus_name)

1284

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

1285

1040

1286

def setter(self, value):

1041

1287

if hasattr(self, "dbus_object_path"):

1042

1288

if (not hasattr(self, attrname) or

1043

1289

type_func(getattr(self, attrname, None))

1044

1290

!= type_func(value)):

1045

dbus_value = transform_func(type_func(value),

1046

variant_level

1047

=variant_level)

1048

self.PropertyChanged(dbus.String(dbus_name),

1049

dbus_value)

1291

if invalidate_only:

1292

self.PropertiesChanged(

1293

_interface, dbus.Dictionary(),

1294

dbus.Array((dbus_name, )))

1295

else:

1296

dbus_value = transform_func(

1297

type_func(value),

1298

variant_level = variant_level)

1299

self.PropertyChanged(dbus.String(dbus_name),

1300

dbus_value)

1301

self.PropertiesChanged(

1302

_interface,

1303

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

1304

dbus_value }),

1305

dbus.Array())

1050

1306

setattr(self, attrname, value)

1051

1307

1052

1308

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

1053

1309

1054

1055

1310

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1056

1311

approvals_pending = notifychangeproperty(dbus.Boolean,

1057

1312

"ApprovalPending",

1059

1314

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

1060

1315

last_enabled = notifychangeproperty(datetime_to_dbus,

1061

1316

"LastEnabled")

1062

checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",

1063

type_func = lambda checker:

1064

checker is not None)

1317

checker = notifychangeproperty(

1318

dbus.Boolean, "CheckerRunning",

1319

type_func = lambda checker: checker is not None)

1065

1320

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1066

1321

"LastCheckedOK")

1322

last_checker_status = notifychangeproperty(dbus.Int16,

1323

"LastCheckerStatus")

1067

1324

last_approval_request = notifychangeproperty(

1068

1325

datetime_to_dbus, "LastApprovalRequest")

1069

1326

approved_by_default = notifychangeproperty(dbus.Boolean,

1070

1327

"ApprovedByDefault")

1071

approval_delay = notifychangeproperty(dbus.UInt16,

1072

"ApprovalDelay",

1073

type_func =

1074

_timedelta_to_milliseconds)

1328

approval_delay = notifychangeproperty(

1329

dbus.UInt64, "ApprovalDelay",

1330

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

1075

1331

approval_duration = notifychangeproperty(

1076

dbus.UInt16, "ApprovalDuration",

1077

type_func = _timedelta_to_milliseconds)

1332

dbus.UInt64, "ApprovalDuration",

1333

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

1078

1334

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

1079

timeout = notifychangeproperty(dbus.UInt16, "Timeout",

1080

type_func =

1081

_timedelta_to_milliseconds)

1335

timeout = notifychangeproperty(

1336

dbus.UInt64, "Timeout",

1337

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

1082

1338

extended_timeout = notifychangeproperty(

1083

dbus.UInt16, "ExtendedTimeout",

1084

type_func = _timedelta_to_milliseconds)

1085

interval = notifychangeproperty(dbus.UInt16,

1086

"Interval",

1087

type_func =

1088

_timedelta_to_milliseconds)

1339

dbus.UInt64, "ExtendedTimeout",

1340

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

1341

interval = notifychangeproperty(

1342

dbus.UInt64, "Interval",

1343

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

1089

1344

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

1345

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

1346

invalidate_only=True)

1090

1347

1091

1348

del notifychangeproperty

1092

1349

1099

1356

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

1100

1357

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

1101

1358

1102

def checker_callback(self, pid, condition, command,

1103

*args, **kwargs):

1104

self.checker_callback_tag = None

1105

self.checker = None

1106

if os.WIFEXITED(condition):

1107

exitstatus = os.WEXITSTATUS(condition)

1359

def checker_callback(self, source, condition,

1360

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

1361

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

1362

connection, command, *args,

1363

**kwargs)

1364

exitstatus = self.last_checker_status

1365

if exitstatus >= 0:

1108

1366

# Emit D-Bus signal

1109

1367

self.CheckerCompleted(dbus.Int16(exitstatus),

1110

dbus.Int64(condition),

1368

dbus.Int64(0),

1111

1369

dbus.String(command))

1112

1370

else:

1113

1371

# Emit D-Bus signal

1114

1372

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

1115

dbus.Int64(condition),

1373

dbus.Int64(

1374

self.last_checker_signal),

1116

1375

dbus.String(command))

1117

1118

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

1119

*args, **kwargs)

1376

return ret

1120

1377

1121

1378

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

1122

old_checker = self.checker

1123

if self.checker is not None:

1124

old_checker_pid = self.checker.pid

1125

else:

1126

old_checker_pid = None

1379

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

1127

1380

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

1128

1381

# Only if new checker process was started

1129

1382

if (self.checker is not None

1133

1386

return r

1134

1387

1135

1388

def _reset_approved(self):

1136

self._approved = None

1389

self.approved = None

1137

1390

return False

1138

1391

1139

1392

def approve(self, value=True):

1393

self.approved = value

1394

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

1395

* 1000), self._reset_approved)

1140

1396

self.send_changedstate()

1141

self._approved = value

1142

gobject.timeout_add(_timedelta_to_milliseconds

1143

(self.approval_duration),

1144

self._reset_approved)

1145

1146

1397

1147

1398

## D-Bus methods, signals & properties

1148

_interface = "se.recompile.Mandos.Client"

1399

1400

## Interfaces

1149

1401

1150

1402

## Signals

1151

1403

1162

1414

pass

1163

1415

1164

1416

# PropertyChanged - signal

1417

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

1165

1418

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

1166

1419

def PropertyChanged(self, property, value):

1167

1420

"D-Bus signal"

1188

1441

"D-Bus signal"

1189

1442

return self.need_approval()

1190

1443

1191

# NeRwequest - signal

1192

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

1193

def NewRequest(self, ip):

1194

"""D-Bus signal

1195

Is sent after a client request a password.

1196

"""

1197

pass

1198

1199

1444

## Methods

1200

1445

1201

1446

# Approve - method

1239

1484

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

1240

1485

1241

1486

# ApprovedByDefault - property

1242

@dbus_service_property(_interface, signature="b",

1487

@dbus_service_property(_interface,

1488

signature="b",

1243

1489

access="readwrite")

1244

1490

def ApprovedByDefault_dbus_property(self, value=None):

1245

1491

if value is None: # get

1247

1493

self.approved_by_default = bool(value)

1248

1494

1249

1495

# ApprovalDelay - property

1250

@dbus_service_property(_interface, signature="t",

1496

@dbus_service_property(_interface,

1497

signature="t",

1251

1498

access="readwrite")

1252

1499

def ApprovalDelay_dbus_property(self, value=None):

1253

1500

if value is None: # get

1254

return dbus.UInt64(self.approval_delay_milliseconds())

1501

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

1502

* 1000)

1255

1503

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

1256

1504

1257

1505

# ApprovalDuration - property

1258

@dbus_service_property(_interface, signature="t",

1506

@dbus_service_property(_interface,

1507

signature="t",

1259

1508

access="readwrite")

1260

1509

def ApprovalDuration_dbus_property(self, value=None):

1261

1510

if value is None: # get

1262

return dbus.UInt64(_timedelta_to_milliseconds(

1263

self.approval_duration))

1511

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

1512

* 1000)

1264

1513

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

1265

1514

1266

1515

# Name - property

1274

1523

return dbus.String(self.fingerprint)

1275

1524

1276

1525

# Host - property

1277

@dbus_service_property(_interface, signature="s",

1526

@dbus_service_property(_interface,

1527

signature="s",

1278

1528

access="readwrite")

1279

1529

def Host_dbus_property(self, value=None):

1280

1530

if value is None: # get

1281

1531

return dbus.String(self.host)

1282

self.host = value

1532

self.host = str(value)

1283

1533

1284

1534

# Created - property

1285

1535

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

1292

1542

return datetime_to_dbus(self.last_enabled)

1293

1543

1294

1544

# Enabled - property

1295

@dbus_service_property(_interface, signature="b",

1545

@dbus_service_property(_interface,

1546

signature="b",

1296

1547

access="readwrite")

1297

1548

def Enabled_dbus_property(self, value=None):

1298

1549

if value is None: # get

1303

1554

self.disable()

1304

1555

1305

1556

# LastCheckedOK - property

1306

@dbus_service_property(_interface, signature="s",

1557

@dbus_service_property(_interface,

1558

signature="s",

1307

1559

access="readwrite")

1308

1560

def LastCheckedOK_dbus_property(self, value=None):

1309

1561

if value is not None:

1311

1563

return

1312

1564

return datetime_to_dbus(self.last_checked_ok)

1313

1565

1566

# LastCheckerStatus - property

1567

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

1568

def LastCheckerStatus_dbus_property(self):

1569

return dbus.Int16(self.last_checker_status)

1570

1314

1571

# Expires - property

1315

1572

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

1316

1573

def Expires_dbus_property(self):

1322

1579

return datetime_to_dbus(self.last_approval_request)

1323

1580

1324

1581

# Timeout - property

1325

@dbus_service_property(_interface, signature="t",

1582

@dbus_service_property(_interface,

1583

signature="t",

1326

1584

access="readwrite")

1327

1585

def Timeout_dbus_property(self, value=None):

1328

1586

if value is None: # get

1329

return dbus.UInt64(self.timeout_milliseconds())

1587

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

1588

old_timeout = self.timeout

1330

1589

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

1331

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

1332

return

1333

# Reschedule timeout

1334

gobject.source_remove(self.disable_initiator_tag)

1335

self.disable_initiator_tag = None

1336

self.expires = None

1337

time_to_die = _timedelta_to_milliseconds((self

1338

.last_checked_ok

1339

+ self.timeout)

1340

- datetime.datetime

1341

.utcnow())

1342

if time_to_die <= 0:

1343

# The timeout has passed

1344

self.disable()

1345

else:

1346

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

1347

+ datetime.timedelta(milliseconds =

1348

time_to_die))

1349

self.disable_initiator_tag = (gobject.timeout_add

1350

(time_to_die, self.disable))

1590

# Reschedule disabling

1591

if self.enabled:

1592

now = datetime.datetime.utcnow()

1593

self.expires += self.timeout - old_timeout

1594

if self.expires <= now:

1595

# The timeout has passed

1596

self.disable()

1597

else:

1598

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

1599

is None):

1600

return

1601

gobject.source_remove(self.disable_initiator_tag)

1602

self.disable_initiator_tag = gobject.timeout_add(

1603

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

1604

self.disable)

1351

1605

1352

1606

# ExtendedTimeout - property

1353

@dbus_service_property(_interface, signature="t",

1607

@dbus_service_property(_interface,

1608

signature="t",

1354

1609

access="readwrite")

1355

1610

def ExtendedTimeout_dbus_property(self, value=None):

1356

1611

if value is None: # get

1357

return dbus.UInt64(self.extended_timeout_milliseconds())

1612

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

1613

* 1000)

1358

1614

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

1359

1615

1360

1616

# Interval - property

1361

@dbus_service_property(_interface, signature="t",

1617

@dbus_service_property(_interface,

1618

signature="t",

1362

1619

access="readwrite")

1363

1620

def Interval_dbus_property(self, value=None):

1364

1621

if value is None: # get

1365

return dbus.UInt64(self.interval_milliseconds())

1622

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

1366

1623

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

1367

1624

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

1368

1625

return

1369

1626

if self.enabled:

1370

1627

# Reschedule checker run

1371

1628

gobject.source_remove(self.checker_initiator_tag)

1372

self.checker_initiator_tag = (gobject.timeout_add

1373

(value, self.start_checker))

1374

self.start_checker() # Start one now, too

1629

self.checker_initiator_tag = gobject.timeout_add(

1630

value, self.start_checker)

1631

self.start_checker() # Start one now, too

1375

1632

1376

1633

# Checker - property

1377

@dbus_service_property(_interface, signature="s",

1634

@dbus_service_property(_interface,

1635

signature="s",

1378

1636

access="readwrite")

1379

1637

def Checker_dbus_property(self, value=None):

1380

1638

if value is None: # get

1381

1639

return dbus.String(self.checker_command)

1382

self.checker_command = value

1640

self.checker_command = str(value)

1383

1641

1384

1642

# CheckerRunning - property

1385

@dbus_service_property(_interface, signature="b",

1643

@dbus_service_property(_interface,

1644

signature="b",

1386

1645

access="readwrite")

1387

1646

def CheckerRunning_dbus_property(self, value=None):

1388

1647

if value is None: # get

1398

1657

return self.dbus_object_path # is already a dbus.ObjectPath

1399

1658

1400

1659

# Secret = property

1401

@dbus_service_property(_interface, signature="ay",

1402

access="write", byte_arrays=True)

1660

@dbus_service_property(_interface,

1661

signature="ay",

1662

access="write",

1663

byte_arrays=True)

1403

1664

def Secret_dbus_property(self, value):

1404

self.secret = str(value)

1665

self.secret = bytes(value)

1405

1666

1406

1667

del _interface

1407

1668

1411

1672

self._pipe = child_pipe

1412

1673

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

1413

1674

if not self._pipe.recv():

1414

raise KeyError()

1675

raise KeyError(fpr)

1415

1676

1416

1677

def __getattribute__(self, name):

1417

if(name == '_pipe'):

1678

if name == '_pipe':

1418

1679

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

1419

1680

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

1420

1681

data = self._pipe.recv()

1421

1682

if data[0] == 'data':

1422

1683

return data[1]

1423

1684

if data[0] == 'function':

1685

1424

1686

def func(*args, **kwargs):

1425

1687

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

1426

1688

return self._pipe.recv()[1]

1689

1427

1690

return func

1428

1691

1429

1692

def __setattr__(self, name, value):

1430

if(name == '_pipe'):

1693

if name == '_pipe':

1431

1694

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

1432

1695

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

1433

1696

1434

1697

1435

class ClientDBusTransitional(ClientDBus):

1436

__metaclass__ = AlternateDBusNamesMetaclass

1437

1438

1439

1698

class ClientHandler(socketserver.BaseRequestHandler, object):

1440

1699

"""A class to handle client connections.

1441

1700

1445

1704

def handle(self):

1446

1705

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

1447

1706

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

1448

unicode(self.client_address))

1707

str(self.client_address))

1449

1708

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

1450

1709

self.server.child_pipe.fileno())

1451

1710

1452

session = (gnutls.connection

1453

.ClientSession(self.request,

1454

gnutls.connection

1455

.X509Credentials()))

1711

session = gnutls.connection.ClientSession(

1712

self.request, gnutls.connection .X509Credentials())

1456

1713

1457

1714

# Note: gnutls.connection.X509Credentials is really a

1458

1715

# generic GnuTLS certificate credentials object so long as

1467

1724

priority = self.server.gnutls_priority

1468

1725

if priority is None:

1469

1726

priority = "NORMAL"

1470

(gnutls.library.functions

1471

.gnutls_priority_set_direct(session._c_object,

1472

priority, None))

1727

gnutls.library.functions.gnutls_priority_set_direct(

1728

session._c_object, priority, None)

1473

1729

1474

1730

# Start communication using the Mandos protocol

1475

1731

# Get protocol number

1477

1733

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

1478

1734

try:

1479

1735

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

1480

raise RuntimeError

1736

raise RuntimeError(line)

1481

1737

except (ValueError, IndexError, RuntimeError) as error:

1482

1738

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

1483

1739

return

1495

1751

approval_required = False

1496

1752

try:

1497

1753

try:

1498

fpr = self.fingerprint(self.peer_certificate

1499

(session))

1754

fpr = self.fingerprint(

1755

self.peer_certificate(session))

1500

1756

except (TypeError,

1501

1757

gnutls.errors.GNUTLSError) as error:

1502

1758

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

1503

1759

return

1504

1760

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

1505

if self.server.use_dbus:

1506

# Emit D-Bus signal

1507

client.NewRequest(str(self.client_address))

1508

1761

1509

1762

try:

1510

1763

client = ProxyClient(child_pipe, fpr,

1520

1773

while True:

1521

1774

if not client.enabled:

1522

1775

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

1523

client.name)

1776

client.name)

1524

1777

if self.server.use_dbus:

1525

1778

# Emit D-Bus signal

1526

1779

client.Rejected("Disabled")

1527

1780

return

1528

1781

1529

if client._approved or not client.approval_delay:

1782

if client.approved or not client.approval_delay:

1530

1783

#We are approved or approval is disabled

1531

1784

break

1532

elif client._approved is None:

1785

elif client.approved is None:

1533

1786

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

1534

1787

client.name)

1535

1788

if self.server.use_dbus:

1536

1789

# Emit D-Bus signal

1537

1790

client.NeedApproval(

1538

client.approval_delay_milliseconds(),

1539

client.approved_by_default)

1791

client.approval_delay.total_seconds()

1792

* 1000, client.approved_by_default)

1540

1793

else:

1541

1794

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

1542

1795

client.name)

1548

1801

#wait until timeout or approved

1549

1802

time = datetime.datetime.now()

1550

1803

client.changedstate.acquire()

1551

(client.changedstate.wait

1552

(float(client._timedelta_to_milliseconds(delay)

1553

/ 1000)))

1804

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

1554

1805

client.changedstate.release()

1555

1806

time2 = datetime.datetime.now()

1556

1807

if (time2 - time) >= delay:

1572

1823

try:

1573

1824

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

1574

1825

except gnutls.errors.GNUTLSError as error:

1575

logger.warning("gnutls send failed")

1826

logger.warning("gnutls send failed",

1827

exc_info=error)

1576

1828

return

1577

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

1578

sent, len(client.secret)

1579

- (sent_size + sent))

1829

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

1830

len(client.secret) - (sent_size

1831

+ sent))

1580

1832

sent_size += sent

1581

1833

1582

1834

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

1583

1835

# bump the timeout using extended_timeout

1584

client.checked_ok(client.extended_timeout)

1836

client.bump_timeout(client.extended_timeout)

1585

1837

if self.server.use_dbus:

1586

1838

# Emit D-Bus signal

1587

1839

client.GotSecret()

1592

1844

try:

1593

1845

session.bye()

1594

1846

except gnutls.errors.GNUTLSError as error:

1595

logger.warning("GnuTLS bye failed")

1847

logger.warning("GnuTLS bye failed",

1848

exc_info=error)

1596

1849

1597

1850

@staticmethod

1598

1851

def peer_certificate(session):

1599

1852

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

1600

1853

# If not an OpenPGP certificate...

1601

if (gnutls.library.functions

1602

.gnutls_certificate_type_get(session._c_object)

1854

if (gnutls.library.functions.gnutls_certificate_type_get(

1855

session._c_object)

1603

1856

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1604

1857

# ...do the normal thing

1605

1858

return session.peer_certificate

1619

1872

def fingerprint(openpgp):

1620

1873

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1621

1874

# New GnuTLS "datum" with the OpenPGP public key

1622

datum = (gnutls.library.types

1623

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

1624

ctypes.POINTER

1625

(ctypes.c_ubyte)),

1626

ctypes.c_uint(len(openpgp))))

1875

datum = gnutls.library.types.gnutls_datum_t(

1876

ctypes.cast(ctypes.c_char_p(openpgp),

1877

ctypes.POINTER(ctypes.c_ubyte)),

1878

ctypes.c_uint(len(openpgp)))

1627

1879

# New empty GnuTLS certificate

1628

1880

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1629

(gnutls.library.functions

1630

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1881

gnutls.library.functions.gnutls_openpgp_crt_init(

1882

ctypes.byref(crt))

1631

1883

# Import the OpenPGP public key into the certificate

1632

(gnutls.library.functions

1633

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

1634

gnutls.library.constants

1635

.GNUTLS_OPENPGP_FMT_RAW))

1884

gnutls.library.functions.gnutls_openpgp_crt_import(

1885

crt, ctypes.byref(datum),

1886

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1636

1887

# Verify the self signature in the key

1637

1888

crtverify = ctypes.c_uint()

1638

(gnutls.library.functions

1639

.gnutls_openpgp_crt_verify_self(crt, 0,

1640

ctypes.byref(crtverify)))

1889

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1890

crt, 0, ctypes.byref(crtverify))

1641

1891

if crtverify.value != 0:

1642

1892

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1643

raise (gnutls.errors.CertificateSecurityError

1644

("Verify failed"))

1893

raise gnutls.errors.CertificateSecurityError(

1894

"Verify failed")

1645

1895

# New buffer for the fingerprint

1646

1896

buf = ctypes.create_string_buffer(20)

1647

1897

buf_len = ctypes.c_size_t()

1648

1898

# Get the fingerprint from the certificate into the buffer

1649

(gnutls.library.functions

1650

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

1651

ctypes.byref(buf_len)))

1899

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1900

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

1652

1901

# Deinit the certificate

1653

1902

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1654

1903

# Convert the buffer to a Python bytestring

1660

1909

1661

1910

class MultiprocessingMixIn(object):

1662

1911

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

1912

1663

1913

def sub_process_main(self, request, address):

1664

1914

try:

1665

1915

self.finish_request(request, address)

1666

except:

1916

except Exception:

1667

1917

self.handle_error(request, address)

1668

1918

self.close_request(request)

1669

1919

1670

1920

def process_request(self, request, address):

1671

1921

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

1672

1922

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

1673

args = (request,

1674

address))

1923

args = (request, address))

1675

1924

proc.start()

1676

1925

return proc

1677

1926

1678

1927

1679

1928

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1680

1929

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

1930

1681

1931

def process_request(self, request, client_address):

1682

1932

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

1683

1933

1692

1942

1693

1943

def add_pipe(self, parent_pipe, proc):

1694

1944

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

1695

raise NotImplementedError

1945

raise NotImplementedError()

1696

1946

1697

1947

1698

1948

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1704

1954

interface: None or a network interface name (string)

1705

1955

use_ipv6: Boolean; to use IPv6 or not

1706

1956

"""

1957

1707

1958

def __init__(self, server_address, RequestHandlerClass,

1708

interface=None, use_ipv6=True):

1959

interface=None,

1960

use_ipv6=True,

1961

socketfd=None):

1962

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

1963

creating a new one with socket.socket().

1964

"""

1709

1965

self.interface = interface

1710

1966

if use_ipv6:

1711

1967

self.address_family = socket.AF_INET6

1968

if socketfd is not None:

1969

# Save the file descriptor

1970

self.socketfd = socketfd

1971

# Save the original socket.socket() function

1972

self.socket_socket = socket.socket

1973

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

1974

#

1975

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

1976

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

1977

# patching socket.socket.)

1978

#

1979

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

1980

@functools.wraps(socket.socket)

1981

def socket_wrapper(*args, **kwargs):

1982

# Restore original function so subsequent calls are

1983

# not affected.

1984

socket.socket = self.socket_socket

1985

del self.socket_socket

1986

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

1987

# saved file descriptor.

1988

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

1989

# Replace socket.socket() function with wrapper

1990

socket.socket = socket_wrapper

1991

# The socketserver.TCPServer.__init__ will call

1992

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

1993

# socket_wrapper(), if socketfd was set.

1712

1994

socketserver.TCPServer.__init__(self, server_address,

1713

1995

RequestHandlerClass)

1996

1714

1997

def server_bind(self):

1715

1998

"""This overrides the normal server_bind() function

1716

1999

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

1722

2005

self.interface)

1723

2006

else:

1724

2007

try:

1725

self.socket.setsockopt(socket.SOL_SOCKET,

1726

SO_BINDTODEVICE,

1727

str(self.interface

1728

+ '\0'))

2008

self.socket.setsockopt(

2009

socket.SOL_SOCKET, SO_BINDTODEVICE,

2010

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

1729

2011

except socket.error as error:

1730

if error[0] == errno.EPERM:

1731

logger.error("No permission to"

1732

" bind to interface %s",

1733

self.interface)

1734

elif error[0] == errno.ENOPROTOOPT:

2012

if error.errno == errno.EPERM:

2013

logger.error("No permission to bind to"

2014

" interface %s", self.interface)

2015

elif error.errno == errno.ENOPROTOOPT:

1735

2016

logger.error("SO_BINDTODEVICE not available;"

1736

2017

" cannot bind to interface %s",

1737

2018

self.interface)

2019

elif error.errno == errno.ENODEV:

2020

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

2021

" cannot bind", self.interface)

1738

2022

else:

1739

2023

raise

1740

2024

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

1743

2027

if self.address_family == socket.AF_INET6:

1744

2028

any_address = "::" # in6addr_any

1745

2029

else:

1746

any_address = socket.INADDR_ANY

2030

any_address = "0.0.0.0" # INADDR_ANY

1747

2031

self.server_address = (any_address,

1748

2032

self.server_address[1])

1749

2033

elif not self.server_address[1]:

1750

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

1751

0)

2034

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

1752

2035

# if self.interface:

1753

2036

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

1754

2037

# 0, # port

1768

2051

1769

2052

Assumes a gobject.MainLoop event loop.

1770

2053

"""

2054

1771

2055

def __init__(self, server_address, RequestHandlerClass,

1772

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

1773

gnutls_priority=None, use_dbus=True):

2056

interface=None,

2057

use_ipv6=True,

2058

clients=None,

2059

gnutls_priority=None,

2060

use_dbus=True,

2061

socketfd=None):

1774

2062

self.enabled = False

1775

2063

self.clients = clients

1776

2064

if self.clients is None:

1780

2068

IPv6_TCPServer.__init__(self, server_address,

1781

2069

RequestHandlerClass,

1782

2070

interface = interface,

1783

use_ipv6 = use_ipv6)

2071

use_ipv6 = use_ipv6,

2072

socketfd = socketfd)

2073

1784

2074

def server_activate(self):

1785

2075

if self.enabled:

1786

2076

return socketserver.TCPServer.server_activate(self)

1790

2080

1791

2081

def add_pipe(self, parent_pipe, proc):

1792

2082

# Call "handle_ipc" for both data and EOF events

1793

gobject.io_add_watch(parent_pipe.fileno(),

1794

gobject.IO_IN | gobject.IO_HUP,

1795

functools.partial(self.handle_ipc,

1796

parent_pipe =

1797

parent_pipe,

1798

proc = proc))

2083

gobject.io_add_watch(

2084

parent_pipe.fileno(),

2085

gobject.IO_IN | gobject.IO_HUP,

2086

functools.partial(self.handle_ipc,

2087

parent_pipe = parent_pipe,

2088

proc = proc))

1799

2089

1800

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

1801

proc = None, client_object=None):

1802

condition_names = {

1803

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

1804

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

1805

# blocking).

1806

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

1807

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

1808

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

1809

# broken, usually for pipes and

1810

# sockets).

1811

}

1812

conditions_string = ' | '.join(name

1813

for cond, name in

1814

condition_names.iteritems()

1815

if cond & condition)

2090

def handle_ipc(self, source, condition,

2091

parent_pipe=None,

2092

proc = None,

2093

client_object=None):

1816

2094

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

1817

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

2095

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

1818

2096

# Wait for other process to exit

1819

2097

proc.join()

1820

2098

return False

1841

2119

parent_pipe.send(False)

1842

2120

return False

1843

2121

1844

gobject.io_add_watch(parent_pipe.fileno(),

1845

gobject.IO_IN | gobject.IO_HUP,

1846

functools.partial(self.handle_ipc,

1847

parent_pipe =

1848

parent_pipe,

1849

proc = proc,

1850

client_object =

1851

client))

2122

gobject.io_add_watch(

2123

parent_pipe.fileno(),

2124

gobject.IO_IN | gobject.IO_HUP,

2125

functools.partial(self.handle_ipc,

2126

parent_pipe = parent_pipe,

2127

proc = proc,

2128

client_object = client))

1852

2129

parent_pipe.send(True)

1853

2130

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

1854

2131

# same fileno

1860

2137

1861

2138

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

1862

2139

funcname)(*args,

1863

**kwargs)))

2140

**kwargs)))

1864

2141

1865

2142

if command == 'getattr':

1866

2143

attrname = request[1]

1867

if callable(client_object.__getattribute__(attrname)):

1868

parent_pipe.send(('function',))

2144

if isinstance(client_object.__getattribute__(attrname),

2145

collections.Callable):

2146

parent_pipe.send(('function', ))

1869

2147

else:

1870

parent_pipe.send(('data', client_object

1871

.__getattribute__(attrname)))

2148

parent_pipe.send((

2149

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

1872

2150

1873

2151

if command == 'setattr':

1874

2152

attrname = request[1]

1878

2156

return True

1879

2157

1880

2158

2159

def rfc3339_duration_to_delta(duration):

2160

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

2161

2162

>>> rfc3339_duration_to_delta("P7D")

2163

datetime.timedelta(7)

2164

>>> rfc3339_duration_to_delta("PT60S")

2165

datetime.timedelta(0, 60)

2166

>>> rfc3339_duration_to_delta("PT60M")

2167

datetime.timedelta(0, 3600)

2168

>>> rfc3339_duration_to_delta("PT24H")

2169

datetime.timedelta(1)

2170

>>> rfc3339_duration_to_delta("P1W")

2171

datetime.timedelta(7)

2172

>>> rfc3339_duration_to_delta("PT5M30S")

2173

datetime.timedelta(0, 330)

2174

>>> rfc3339_duration_to_delta("P1DT3M20S")

2175

datetime.timedelta(1, 200)

2176

"""

2177

2178

# Parsing an RFC 3339 duration with regular expressions is not

2179

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

2180

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

2181

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

2182

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

2183

# avoid excessive use of external libraries.

2184

2185

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

2186

Token = collections.namedtuple("Token", (

2187

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

2188

# a "group" containing digits

2189

"value", # datetime.timedelta or None

2190

"followers")) # Tokens valid after this token

2191

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

2192

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

2193

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

2194

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

2195

datetime.timedelta(seconds=1),

2196

frozenset((token_end, )))

2197

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

2198

datetime.timedelta(minutes=1),

2199

frozenset((token_second, token_end)))

2200

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

2201

datetime.timedelta(hours=1),

2202

frozenset((token_minute, token_end)))

2203

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

2204

None,

2205

frozenset((token_hour, token_minute,

2206

token_second)))

2207

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

2208

datetime.timedelta(days=1),

2209

frozenset((token_time, token_end)))

2210

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

2211

datetime.timedelta(weeks=4),

2212

frozenset((token_day, token_end)))

2213

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

2214

datetime.timedelta(weeks=52),

2215

frozenset((token_month, token_end)))

2216

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

2217

datetime.timedelta(weeks=1),

2218

frozenset((token_end, )))

2219

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

2220

frozenset((token_year, token_month,

2221

token_day, token_time,

2222

token_week)))

2223

# Define starting values

2224

value = datetime.timedelta() # Value so far

2225

found_token = None

2226

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

2227

s = duration # String left to parse

2228

# Loop until end token is found

2229

while found_token is not token_end:

2230

# Search for any currently valid tokens

2231

for token in followers:

2232

match = token.regexp.match(s)

2233

if match is not None:

2234

# Token found

2235

if token.value is not None:

2236

# Value found, parse digits

2237

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

2238

# Add to value so far

2239

value += factor * token.value

2240

# Strip token from string

2241

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

2242

# Go to found token

2243

found_token = token

2244

# Set valid next tokens

2245

followers = found_token.followers

2246

break

2247

else:

2248

# No currently valid tokens were found

2249

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

2250

.format(duration))

2251

# End token found

2252

return value

2253

2254

1881

2255

def string_to_delta(interval):

1882

2256

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

1883

2257

1894

2268

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

1895

2269

datetime.timedelta(0, 330)

1896

2270

"""

2271

2272

try:

2273

return rfc3339_duration_to_delta(interval)

2274

except ValueError:

2275

pass

2276

1897

2277

timevalue = datetime.timedelta(0)

1898

2278

for s in interval.split():

1899

2279

try:

1900

suffix = unicode(s[-1])

2280

suffix = s[-1]

1901

2281

value = int(s[:-1])

1902

2282

if suffix == "d":

1903

2283

delta = datetime.timedelta(value)

1910

2290

elif suffix == "w":

1911

2291

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

1912

2292

else:

1913

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

1914

except (ValueError, IndexError) as e:

2293

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

2294

except IndexError as e:

1915

2295

raise ValueError(*(e.args))

1916

2296

timevalue += delta

1917

2297

return timevalue

1930

2310

sys.exit()

1931

2311

if not noclose:

1932

2312

# Close all standard open file descriptors

1933

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

2313

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

1934

2314

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

1935

2315

raise OSError(errno.ENODEV,

1936

"%s not a character device"

1937

% os.path.devnull)

2316

"{} not a character device"

2317

.format(os.devnull))

1938

2318

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

1939

2319

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

1940

2320

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

1949

2329

1950

2330

parser = argparse.ArgumentParser()

1951

2331

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

1952

version = "%%(prog)s %s" % version,

2332

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

1953

2333

help="show version number and exit")

1954

2334

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

1955

2335

help="Bind to interface IF")

1961

2341

help="Run self-test")

1962

2342

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

1963

2343

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

1964

" to terminal")

2344

" to terminal", default=None)

1965

2345

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

1966

2346

help="Debug level for stdout output")

1967

2347

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

1974

2354

" files")

1975

2355

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

1976

2356

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

1977

" system bus interface")

2357

" system bus interface", default=None)

1978

2358

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

1979

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

2359

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

2360

default=None)

1980

2361

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

1981

2362

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

1982

" state")

2363

" state", default=None)

2364

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

2365

help="Specify a file descriptor to a network"

2366

" socket to use instead of creating one")

1983

2367

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

1984

2368

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

2369

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

2370

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

2371

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

2372

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

2373

default=None)

1985

2374

1986

2375

options = parser.parse_args()

1987

2376

1988

2377

if options.check:

1989

2378

import doctest

1990

doctest.testmod()

1991

sys.exit()

2379

fail_count, test_count = doctest.testmod()

2380

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

1992

2381

1993

2382

# Default values for config file for server-global settings

1994

2383

server_defaults = { "interface": "",

1996

2385

"port": "",

1997

2386

"debug": "False",

1998

2387

"priority":

1999

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

2388

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

2389

":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2000

2390

"servicename": "Mandos",

2001

2391

"use_dbus": "True",

2002

2392

"use_ipv6": "True",

2003

2393

"debuglevel": "",

2004

2394

"restore": "True",

2005

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

2006

}

2395

"socket": "",

2396

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

2397

"foreground": "False",

2398

"zeroconf": "True",

2399

}

2007

2400

2008

2401

# Parse config file for server-global settings

2009

2402

server_config = configparser.SafeConfigParser(server_defaults)

2010

2403

del server_defaults

2011

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

2012

"mandos.conf"))

2404

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

2013

2405

# Convert the SafeConfigParser object to a dict

2014

2406

server_settings = server_config.defaults()

2015

2407

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

2016

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

2408

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

2017

2409

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

2018

2410

option)

2019

2411

if server_settings["port"]:

2020

2412

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

2021

2413

"port")

2414

if server_settings["socket"]:

2415

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

2416

"socket")

2417

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

2418

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

2419

# happen with a supplied network socket.

2420

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

2421

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

2422

["socket"])

2022

2423

del server_config

2023

2424

2024

2425

# Override the settings from the config file with command line

2025

2426

# options, if set.

2026

2427

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

2027

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

2028

"use_dbus", "use_ipv6", "debuglevel", "restore",

2029

"statedir"):

2428

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

2429

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

2430

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

2030

2431

value = getattr(options, option)

2031

2432

if value is not None:

2032

2433

server_settings[option] = value

2033

2434

del options

2034

2435

# Force all strings to be unicode

2035

2436

for option in server_settings.keys():

2036

if type(server_settings[option]) is str:

2037

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

2437

if isinstance(server_settings[option], bytes):

2438

server_settings[option] = (server_settings[option]

2439

.decode("utf-8"))

2440

# Force all boolean options to be boolean

2441

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

2442

"foreground", "zeroconf"):

2443

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

2444

# Debug implies foreground

2445

if server_settings["debug"]:

2446

server_settings["foreground"] = True

2038

2447

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

2039

2448

2040

2449

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

2041

2450

2451

if (not server_settings["zeroconf"]

2452

and not (server_settings["port"]

2453

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

2454

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

2455

2042

2456

# For convenience

2043

2457

debug = server_settings["debug"]

2044

2458

debuglevel = server_settings["debuglevel"]

2046

2460

use_ipv6 = server_settings["use_ipv6"]

2047

2461

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

2048

2462

stored_state_file)

2463

foreground = server_settings["foreground"]

2464

zeroconf = server_settings["zeroconf"]

2049

2465

2050

2466

if debug:

2051

initlogger(logging.DEBUG)

2467

initlogger(debug, logging.DEBUG)

2052

2468

else:

2053

2469

if not debuglevel:

2054

initlogger()

2470

initlogger(debug)

2055

2471

else:

2056

2472

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

2057

initlogger(level)

2473

initlogger(debug, level)

2058

2474

2059

2475

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

2060

syslogger.setFormatter(logging.Formatter

2061

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

2062

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

2063

% server_settings["servicename"]))

2476

syslogger.setFormatter(

2477

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

2478

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

2479

server_settings["servicename"])))

2064

2480

2065

2481

# Parse config file with clients

2066

client_defaults = { "timeout": "5m",

2067

"extended_timeout": "15m",

2068

"interval": "2m",

2069

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

2070

"host": "",

2071

"approval_delay": "0s",

2072

"approval_duration": "1s",

2073

}

2074

client_config = configparser.SafeConfigParser(client_defaults)

2482

client_config = configparser.SafeConfigParser(Client

2483

.client_defaults)

2075

2484

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

2076

2485

"clients.conf"))

2077

2486

2078

2487

global mandos_dbus_service

2079

2488

mandos_dbus_service = None

2080

2489

2081

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

2082

server_settings["port"]),

2083

ClientHandler,

2084

interface=(server_settings["interface"]

2085

or None),

2086

use_ipv6=use_ipv6,

2087

gnutls_priority=

2088

server_settings["priority"],

2089

use_dbus=use_dbus)

2090

if not debug:

2091

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

2490

socketfd = None

2491

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

2492

socketfd = server_settings["socket"]

2493

tcp_server = MandosServer(

2494

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

2495

ClientHandler,

2496

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

2497

use_ipv6=use_ipv6,

2498

gnutls_priority=server_settings["priority"],

2499

use_dbus=use_dbus,

2500

socketfd=socketfd)

2501

if not foreground:

2502

pidfilename = "/run/mandos.pid"

2503

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

2504

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

2505

pidfile = None

2092

2506

try:

2093

pidfile = open(pidfilename, "w")

2094

except IOError:

2095

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

2507

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

2508

except IOError as e:

2509

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

2510

exc_info=e)

2096

2511

2097

try:

2098

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

2099

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

2100

except KeyError:

2512

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

2101

2513

try:

2102

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

2103

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

2514

uid = pwd.getpwnam(name).pw_uid

2515

gid = pwd.getpwnam(name).pw_gid

2516

break

2104

2517

except KeyError:

2105

try:

2106

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

2107

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

2108

except KeyError:

2109

uid = 65534

2110

gid = 65534

2518

continue

2519

else:

2520

uid = 65534

2521

gid = 65534

2111

2522

try:

2112

2523

os.setgid(gid)

2113

2524

os.setuid(uid)

2114

2525

except OSError as error:

2115

if error[0] != errno.EPERM:

2116

raise error

2526

if error.errno != errno.EPERM:

2527

raise

2117

2528

2118

2529

if debug:

2119

2530

# Enable all possible GnuTLS debugging

2126

2537

def debug_gnutls(level, string):

2127

2538

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

2128

2539

2129

(gnutls.library.functions

2130

.gnutls_global_set_log_function(debug_gnutls))

2540

gnutls.library.functions.gnutls_global_set_log_function(

2541

debug_gnutls)

2131

2542

2132

2543

# Redirect stdin so all checkers get /dev/null

2133

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

2544

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

2134

2545

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

2135

2546

if null > 2:

2136

2547

os.close(null)

2137

else:

2138

# No console logging

2139

logger.removeHandler(console)

2140

2548

2141

2549

# Need to fork before connecting to D-Bus

2142

if not debug:

2550

if not foreground:

2143

2551

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

2144

2552

daemon()

2145

2553

2554

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

2555

# need to inform gobject that threads will be used.

2556

gobject.threads_init()

2557

2146

2558

global main_loop

2147

2559

# From the Avahi example code

2148

DBusGMainLoop(set_as_default=True )

2560

DBusGMainLoop(set_as_default=True)

2149

2561

main_loop = gobject.MainLoop()

2150

2562

bus = dbus.SystemBus()

2151

2563

# End of Avahi example code

2152

2564

if use_dbus:

2153

2565

try:

2154

2566

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

2155

bus, do_not_queue=True)

2156

old_bus_name = (dbus.service.BusName

2157

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

2158

do_not_queue=True))

2159

except dbus.exceptions.NameExistsException as e:

2160

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

2567

bus,

2568

do_not_queue=True)

2569

old_bus_name = dbus.service.BusName(

2570

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

2571

do_not_queue=True)

2572

except dbus.exceptions.DBusException as e:

2573

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

2161

2574

use_dbus = False

2162

2575

server_settings["use_dbus"] = False

2163

2576

tcp_server.use_dbus = False

2164

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2165

service = AvahiServiceToSyslog(name =

2166

server_settings["servicename"],

2167

servicetype = "_mandos._tcp",

2168

protocol = protocol, bus = bus)

2169

if server_settings["interface"]:

2170

service.interface = (if_nametoindex

2171

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

2577

if zeroconf:

2578

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2579

service = AvahiServiceToSyslog(

2580

name = server_settings["servicename"],

2581

servicetype = "_mandos._tcp",

2582

protocol = protocol,

2583

bus = bus)

2584

if server_settings["interface"]:

2585

service.interface = if_nametoindex(

2586

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

2172

2587

2173

2588

global multiprocessing_manager

2174

2589

multiprocessing_manager = multiprocessing.Manager()

2175

2590

2176

2591

client_class = Client

2177

2592

if use_dbus:

2178

client_class = functools.partial(ClientDBusTransitional,

2179

bus = bus)

2180

2181

special_settings = {

2182

# Some settings need to be accessd by special methods;

2183

# booleans need .getboolean(), etc. Here is a list of them:

2184

"approved_by_default":

2185

lambda section:

2186

client_config.getboolean(section, "approved_by_default"),

2187

"enabled":

2188

lambda section:

2189

client_config.getboolean(section, "enabled"),

2190

}

2191

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

2192

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

2193

# with exceptions for any special settings as defined above

2194

client_settings = dict((clientname,

2195

dict((setting,

2196

(value

2197

if setting not in special_settings

2198

else special_settings[setting]

2199

(clientname)))

2200

for setting, value in

2201

client_config.items(clientname)))

2202

for clientname in client_config.sections())

2203

2593

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

2594

2595

client_settings = Client.config_parser(client_config)

2204

2596

old_client_settings = {}

2205

clients_data = []

2597

clients_data = {}

2598

2599

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

2600

global wnull

2601

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

2602

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

2603

# mode

2604

if debug or not foreground:

2605

wnull.close()

2206

2606

2207

2607

# Get client data and settings from last running state.

2208

2608

if server_settings["restore"]:

2209

2609

try:

2210

2610

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

2211

clients_data, old_client_settings = (pickle.load

2212

(stored_state))

2611

clients_data, old_client_settings = pickle.load(

2612

stored_state)

2213

2613

os.remove(stored_state_path)

2214

2614

except IOError as e:

2215

logger.warning("Could not load persistent state: {0}"

2216

.format(e))

2217

if e.errno != errno.ENOENT:

2615

if e.errno == errno.ENOENT:

2616

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

2617

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

2618

else:

2619

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

2620

exc_info=e)

2218

2621

raise

2622

except EOFError as e:

2623

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

2624

"EOFError:",

2625

exc_info=e)

2219

2626

2220

with Crypto() as crypt:

2221

for client in clients_data:

2222

client_name = client["name"]

2627

with PGPEngine() as pgp:

2628

for client_name, client in clients_data.items():

2629

# Skip removed clients

2630

if client_name not in client_settings:

2631

continue

2223

2632

2224

2633

# Decide which value to use after restoring saved state.

2225

2634

# We have three different values: Old config file,

2231

2640

# For each value in new config, check if it

2232

2641

# differs from the old config value (Except for

2233

2642

# the "secret" attribute)

2234

if (name != "secret" and

2235

value != old_client_settings[client_name]

2236

[name]):

2237

setattr(client, name, value)

2643

if (name != "secret"

2644

and (value !=

2645

old_client_settings[client_name][name])):

2646

client[name] = value

2238

2647

except KeyError:

2239

2648

pass

2240

2649

2241

2650

# Clients who has passed its expire date can still be

2242

# enabled if its last checker was sucessful. Clients

2243

# whose checker failed before we stored its state is

2244

# assumed to have failed all checkers during downtime.

2245

if client["enabled"] and client["last_checked_ok"]:

2246

if ((datetime.datetime.utcnow()

2247

- client["last_checked_ok"])

2248

> client["interval"]):

2249

if client["last_checker_status"] != 0:

2651

# enabled if its last checker was successful. A Client

2652

# whose checker succeeded before we stored its state is

2653

# assumed to have successfully run all checkers during

2654

# downtime.

2655

if client["enabled"]:

2656

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

2657

if not client["last_checked_ok"]:

2658

logger.warning(

2659

"disabling client {} - Client never "

2660

"performed a successful checker".format(

2661

client_name))

2662

client["enabled"] = False

2663

elif client["last_checker_status"] != 0:

2664

logger.warning(

2665

"disabling client {} - Client last"

2666

" checker failed with error code"

2667

" {}".format(

2668

client_name,

2669

client["last_checker_status"]))

2250

2670

client["enabled"] = False

2251

2671

else:

2252

client["expires"] = (datetime.datetime

2253

.utcnow()

2254

+ client["timeout"])

2255

2256

client["changedstate"] = (multiprocessing_manager

2257

.Condition

2258

(multiprocessing_manager

2259

.Lock()))

2260

if use_dbus:

2261

new_client = (ClientDBusTransitional.__new__

2262

(ClientDBusTransitional))

2263

tcp_server.clients[client_name] = new_client

2264

new_client.bus = bus

2265

for name, value in client.iteritems():

2266

setattr(new_client, name, value)

2267

client_object_name = unicode(client_name).translate(

2268

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

2269

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

2270

new_client.dbus_object_path = (dbus.ObjectPath

2271

("/clients/"

2272

+ client_object_name))

2273

DBusObjectWithProperties.__init__(new_client,

2274

new_client.bus,

2275

new_client

2276

.dbus_object_path)

2277

else:

2278

tcp_server.clients[client_name] = (Client.__new__

2279

(Client))

2280

for name, value in client.iteritems():

2281

setattr(tcp_server.clients[client_name],

2282

name, value)

2283

2672

client["expires"] = (

2673

datetime.datetime.utcnow()

2674

+ client["timeout"])

2675

logger.debug("Last checker succeeded,"

2676

" keeping {} enabled".format(

2677

client_name))

2284

2678

try:

2285

tcp_server.clients[client_name].secret = (

2286

crypt.decrypt(tcp_server.clients[client_name]

2287

.encrypted_secret,

2288

client_settings[client_name]

2289

["secret"]))

2290

except CryptoError:

2679

client["secret"] = pgp.decrypt(

2680

client["encrypted_secret"],

2681

client_settings[client_name]["secret"])

2682

except PGPError:

2291

2683

# If decryption fails, we use secret from new settings

2292

tcp_server.clients[client_name].secret = (

2293

client_settings[client_name]["secret"])

2294

2295

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

2296

for clientname in set(old_client_settings) - set(client_settings):

2297

del tcp_server.clients[clientname]

2298

for clientname in set(client_settings) - set(old_client_settings):

2299

tcp_server.clients[clientname] = (client_class(name

2300

= clientname,

2301

config =

2302

client_settings

2303

[clientname]))

2684

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

2685

client_name))

2686

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

2687

["secret"])

2688

2689

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

2690

for client_name in (set(old_client_settings)

2691

- set(client_settings)):

2692

del clients_data[client_name]

2693

for client_name in (set(client_settings)

2694

- set(old_client_settings)):

2695

clients_data[client_name] = client_settings[client_name]

2696

2697

# Create all client objects

2698

for client_name, client in clients_data.items():

2699

tcp_server.clients[client_name] = client_class(

2700

name = client_name,

2701

settings = client,

2702

server_settings = server_settings)

2304

2703

2305

2704

if not tcp_server.clients:

2306

2705

logger.warning("No clients defined")

2307

2308

if not debug:

2309

try:

2310

with pidfile:

2311

pid = os.getpid()

2312

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

2313

del pidfile

2314

except IOError:

2315

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

2316

pidfilename, pid)

2317

except NameError:

2318

# "pidfile" was never created

2319

pass

2706

2707

if not foreground:

2708

if pidfile is not None:

2709

pid = os.getpid()

2710

try:

2711

with pidfile:

2712

print(pid, file=pidfile)

2713

except IOError:

2714

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

2715

pidfilename, pid)

2716

del pidfile

2320

2717

del pidfilename

2321

2322

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

2323

2718

2324

2719

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

2325

2720

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

2326

2721

2327

2722

if use_dbus:

2328

class MandosDBusService(dbus.service.Object):

2723

2724

@alternate_dbus_interfaces(

2725

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

2726

class MandosDBusService(DBusObjectWithProperties):

2329

2727

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

2728

2330

2729

def __init__(self):

2331

2730

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

2731

2332

2732

_interface = "se.recompile.Mandos"

2333

2733

2734

@dbus_interface_annotations(_interface)

2735

def _foo(self):

2736

return {

2737

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

2738

"false" }

2739

2334

2740

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

2335

2741

def ClientAdded(self, objpath):

2336

2742

"D-Bus signal"

2349

2755

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

2350

2756

def GetAllClients(self):

2351

2757

"D-Bus method"

2352

return dbus.Array(c.dbus_object_path

2353

for c in

2758

return dbus.Array(c.dbus_object_path for c in

2354

2759

tcp_server.clients.itervalues())

2355

2760

2356

2761

@dbus.service.method(_interface,

2358

2763

def GetAllClientsWithProperties(self):

2359

2764

"D-Bus method"

2360

2765

return dbus.Dictionary(

2361

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

2362

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

2766

{ c.dbus_object_path: c.GetAll("")

2767

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

2363

2768

signature="oa{sv}")

2364

2769

2365

2770

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

2378

2783

2379

2784

del _interface

2380

2785

2381

class MandosDBusServiceTransitional(MandosDBusService):

2382

__metaclass__ = AlternateDBusNamesMetaclass

2383

mandos_dbus_service = MandosDBusServiceTransitional()

2786

mandos_dbus_service = MandosDBusService()

2384

2787

2385

2788

def cleanup():

2386

2789

"Cleanup function; run on exit"

2387

service.cleanup()

2790

if zeroconf:

2791

service.cleanup()

2388

2792

2389

2793

multiprocessing.active_children()

2794

wnull.close()

2390

2795

if not (tcp_server.clients or client_settings):

2391

2796

return

2392

2797

2393

2798

# Store client before exiting. Secrets are encrypted with key

2394

2799

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

2395

2800

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

2396

clients = []

2397

with Crypto() as crypt:

2801

clients = {}

2802

with PGPEngine() as pgp:

2398

2803

for client in tcp_server.clients.itervalues():

2399

2804

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

2400

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

2401

key)

2805

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

2806

key)

2402

2807

client_dict = {}

2403

2808

2404

# A list of attributes that will not be stored when

2405

# shutting down.

2406

exclude = set(("bus", "changedstate", "secret"))

2407

for name, typ in (inspect.getmembers

2408

(dbus.service.Object)):

2809

# A list of attributes that can not be pickled

2810

# + secret.

2811

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

2812

"checker", "server_settings" }

2813

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

2814

.Object):

2409

2815

exclude.add(name)

2410

2816

2411

2817

client_dict["encrypted_secret"] = (client

2414

2820

if attr not in exclude:

2415

2821

client_dict[attr] = getattr(client, attr)

2416

2822

2417

clients.append(client_dict)

2823

clients[client.name] = client_dict

2418

2824

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

2419

2825

2420

2826

try:

2421

with os.fdopen(os.open(stored_state_path,

2422

os.O_CREAT|os.O_WRONLY|os.O_TRUNC,

2423

0600), "wb") as stored_state:

2827

with tempfile.NamedTemporaryFile(

2828

mode='wb',

2829

suffix=".pickle",

2830

prefix='clients-',

2831

dir=os.path.dirname(stored_state_path),

2832

delete=False) as stored_state:

2424

2833

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

2834

tempname = stored_state.name

2835

os.rename(tempname, stored_state_path)

2425

2836

except (IOError, OSError) as e:

2426

logger.warning("Could not save persistent state: {0}"

2427

.format(e))

2428

if e.errno not in (errno.ENOENT, errno.EACCES):

2837

if not debug:

2838

try:

2839

os.remove(tempname)

2840

except NameError:

2841

pass

2842

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

2843

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

2844

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

2845

else:

2846

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

2847

exc_info=e)

2429

2848

raise

2430

2849

2431

2850

# Delete all clients, and settings from config

2437

2856

client.disable(quiet=True)

2438

2857

if use_dbus:

2439

2858

# Emit D-Bus signal

2440

mandos_dbus_service.ClientRemoved(client

2441

.dbus_object_path,

2442

client.name)

2859

mandos_dbus_service.ClientRemoved(

2860

client.dbus_object_path, client.name)

2443

2861

client_settings.clear()

2444

2862

2445

2863

atexit.register(cleanup)

2456

2874

tcp_server.server_activate()

2457

2875

2458

2876

# Find out what port we got

2459

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

2877

if zeroconf:

2878

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

2460

2879

if use_ipv6:

2461

2880

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

2462

" flowinfo %d, scope_id %d"

2463

% tcp_server.socket.getsockname())

2881

" flowinfo %d, scope_id %d",

2882

*tcp_server.socket.getsockname())

2464

2883

else: # IPv4

2465

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

2466

% tcp_server.socket.getsockname())

2884

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

2885

*tcp_server.socket.getsockname())

2467

2886

2468

2887

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

2469

2888

2470

2889

try:

2471

# From the Avahi example code

2472

try:

2473

service.activate()

2474

except dbus.exceptions.DBusException as error:

2475

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

2476

cleanup()

2477

sys.exit(1)

2478

# End of Avahi example code

2890

if zeroconf:

2891

# From the Avahi example code

2892

try:

2893

service.activate()

2894

except dbus.exceptions.DBusException as error:

2895

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

2896

cleanup()

2897

sys.exit(1)

2898

# End of Avahi example code

2479

2899

2480

2900

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

2481

2901

lambda *args, **kwargs:

2485

2905

logger.debug("Starting main loop")

2486

2906

main_loop.run()

2487

2907

except AvahiError as error:

2488

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

2908

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

2489

2909

cleanup()

2490

2910

sys.exit(1)

2491

2911

except KeyboardInterrupt: