/mandos/release : revision 237.7.317

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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)

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364

self.rename()

319

365

elif state == avahi.ENTRY_GROUP_FAILURE:

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366

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

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unicode(error))

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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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pass

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self.group = None

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379

self.remove()

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

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

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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:

341

"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",

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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:

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if bad_states[state] is not None:

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392

if error is None:

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

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self.cleanup()

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397

elif state == avahi.SERVER_RUNNING:

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self.add()

398

try:

399

self.add()

400

except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

402

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

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logger.info("Local Zeroconf service name"

404

" collision.")

405

return self.rename(remove=False)

406

else:

407

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

408

self.cleanup()

409

os._exit(1)

353

410

else:

354

411

if error is None:

355

412

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

356

413

else:

357

414

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

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358

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def activate(self):

359

417

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

360

418

if self.server is None:

364

422

follow_name_owner_changes=True),

365

423

avahi.DBUS_INTERFACE_SERVER)

366

424

self.server.connect_to_signal("StateChanged",

367

self.server_state_changed)

425

self.server_state_changed)

368

426

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

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427

428

370

429

class AvahiServiceToSyslog(AvahiService):

371

def rename(self):

430

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

372

431

"""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))

432

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

433

syslogger.setFormatter(logging.Formatter(

434

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

435

.format(self.name)))

378

436

return ret

379

437

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

438

def call_pipe(connection, # : multiprocessing.Connection

439

func, *args, **kwargs):

440

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

441

442

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

443

return value on the provided multiprocessing.Connection.

444

"""

445

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

446

connection.close()

447

386

448

class Client(object):

387

449

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

388

450

389

451

Attributes:

390

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

452

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

391

453

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

392

454

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

393

455

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

411

473

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

412

474

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

413

475

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

414

415

476

last_checker_status: integer between 0 and 255 reflecting exit

416

477

status of last checker. -1 reflects crashed

417

checker, or None.

478

checker, -2 means no checker completed yet.

479

last_checker_signal: The signal which killed the last checker, if

480

last_checker_status is -1

418

481

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

419

482

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

420

483

D-Bus identifiers

421

484

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

422

485

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

423

486

until this client is disabled

424

extended_timeout: extra long timeout when password has been sent

487

extended_timeout: extra long timeout when secret has been sent

425

488

runtime_expansions: Allowed attributes for runtime expansion.

426

489

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

427

490

disabled, or None

491

server_settings: The server_settings dict from main()

428

492

"""

429

493

430

494

runtime_expansions = ("approval_delay", "approval_duration",

431

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

432

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

495

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

496

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

497

"last_approval_request", "last_checked_ok",

433

498

"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."""

499

client_defaults = {

500

"timeout": "PT5M",

501

"extended_timeout": "PT15M",

502

"interval": "PT2M",

503

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

504

"host": "",

505

"approval_delay": "PT0S",

506

"approval_duration": "PT1S",

507

"approved_by_default": "True",

508

"enabled": "True",

509

}

510

511

@staticmethod

512

def config_parser(config):

513

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

514

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

515

with exceptions for any special settings as defined above.

516

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

517

value given the same arguments.

518

"""

519

settings = {}

520

for client_name in config.sections():

521

section = dict(config.items(client_name))

522

client = settings[client_name] = {}

523

524

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

525

# Reformat values from string types to Python types

526

client["approved_by_default"] = config.getboolean(

527

client_name, "approved_by_default")

528

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

529

"enabled")

530

531

# Uppercase and remove spaces from fingerprint for later

532

# comparison purposes with return value from the

533

# fingerprint() function

534

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

535

.replace(" ", ""))

536

if "secret" in section:

537

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

538

elif "secfile" in section:

539

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

540

(section["secfile"])),

541

"rb") as secfile:

542

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

543

else:

544

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

545

.format(section))

546

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

547

client["extended_timeout"] = string_to_delta(

548

section["extended_timeout"])

549

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

550

client["approval_delay"] = string_to_delta(

551

section["approval_delay"])

552

client["approval_duration"] = string_to_delta(

553

section["approval_duration"])

554

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

555

client["last_approval_request"] = None

556

client["last_checked_ok"] = None

557

client["last_checker_status"] = -2

558

559

return settings

560

561

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

454

562

self.name = name

455

if config is None:

456

config = {}

563

if server_settings is None:

564

server_settings = {}

565

self.server_settings = server_settings

566

# adding all client settings

567

for setting, value in settings.items():

568

setattr(self, setting, value)

569

570

if self.enabled:

571

if not hasattr(self, "last_enabled"):

572

self.last_enabled = datetime.datetime.utcnow()

573

if not hasattr(self, "expires"):

574

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

575

+ self.timeout)

576

else:

577

self.last_enabled = None

578

self.expires = None

579

457

580

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

581

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"])

582

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

583

datetime.datetime.utcnow())

584

585

# attributes specific for this server instance

488

586

self.checker = None

489

587

self.checker_initiator_tag = None

490

588

self.disable_initiator_tag = None

491

if self.enabled:

492

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

493

else:

494

self.expires = None

495

589

self.checker_callback_tag = None

496

self.checker_command = config["checker"]

497

590

self.current_checker_command = None

498

self._approved = None

499

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

500

True)

591

self.approved = None

501

592

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()

593

self.changedstate = multiprocessing_manager.Condition(

594

multiprocessing_manager.Lock())

595

self.client_structure = [attr

596

for attr in self.__dict__.iterkeys()

511

597

if not attr.startswith("_")]

512

598

self.client_structure.append("client_structure")

513

599

514

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

515

lambda obj:

516

isinstance(obj,

517

property)):

600

for name, t in inspect.getmembers(

601

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

518

602

if not name.startswith("_"):

519

603

self.client_structure.append(name)

520

604

528

612

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

529

613

# Already enabled

530

614

return

531

self.send_changedstate()

532

615

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

533

616

self.enabled = True

534

617

self.last_enabled = datetime.datetime.utcnow()

535

618

self.init_checker()

619

self.send_changedstate()

536

620

537

621

def disable(self, quiet=True):

538

622

"""Disable this client."""

539

623

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

540

624

return False

541

625

if not quiet:

542

self.send_changedstate()

543

if not quiet:

544

626

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

545

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

627

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

546

628

gobject.source_remove(self.disable_initiator_tag)

547

629

self.disable_initiator_tag = None

548

630

self.expires = None

549

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

631

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

550

632

gobject.source_remove(self.checker_initiator_tag)

551

633

self.checker_initiator_tag = None

552

634

self.stop_checker()

553

635

self.enabled = False

636

if not quiet:

637

self.send_changedstate()

554

638

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

555

639

return False

556

640

560

644

def init_checker(self):

561

645

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

562

646

# and every interval from then on.

563

self.checker_initiator_tag = (gobject.timeout_add

564

(self.interval_milliseconds(),

565

self.start_checker))

647

if self.checker_initiator_tag is not None:

648

gobject.source_remove(self.checker_initiator_tag)

649

self.checker_initiator_tag = gobject.timeout_add(

650

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

651

self.start_checker)

566

652

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

567

self.disable_initiator_tag = (gobject.timeout_add

568

(self.timeout_milliseconds(),

569

self.disable))

653

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = gobject.timeout_add(

656

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

570

657

# Also start a new checker *right now*.

571

658

self.start_checker()

572

659

573

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

660

def checker_callback(self, source, condition, connection,

661

command):

574

662

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

575

663

self.checker_callback_tag = None

576

664

self.checker = None

577

if os.WIFEXITED(condition):

578

self.last_checker_status = os.WEXITSTATUS(condition)

665

# Read return code from connection (see call_pipe)

666

returncode = connection.recv()

667

connection.close()

668

669

if returncode >= 0:

670

self.last_checker_status = returncode

671

self.last_checker_signal = None

579

672

if self.last_checker_status == 0:

580

673

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

581

674

vars(self))

582

675

self.checked_ok()

583

676

else:

584

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

585

vars(self))

677

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

586

678

else:

587

679

self.last_checker_status = -1

680

self.last_checker_signal = -returncode

588

681

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

589

682

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

"""

683

return False

684

685

def checked_ok(self):

686

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

687

self.last_checked_ok = datetime.datetime.utcnow()

688

self.last_checker_status = 0

689

self.last_checker_signal = None

690

self.bump_timeout()

691

692

def bump_timeout(self, timeout=None):

693

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

597

694

if timeout is None:

598

695

timeout = self.timeout

599

self.last_checked_ok = datetime.datetime.utcnow()

600

696

if self.disable_initiator_tag is not None:

601

697

gobject.source_remove(self.disable_initiator_tag)

698

self.disable_initiator_tag = None

602

699

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

603

self.disable_initiator_tag = (gobject.timeout_add

604

(_timedelta_to_milliseconds

605

(timeout), self.disable))

700

self.disable_initiator_tag = gobject.timeout_add(

701

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

606

702

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

607

703

608

704

def need_approval(self):

614

710

If a checker already exists, leave it running and do

615

711

nothing."""

616

712

# 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

713

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

714

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

715

# would inevitably timeout, since no checker would get a

716

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

621

717

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

622

718

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

623

719

# should be.

624

720

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)

721

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

722

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

723

self.checker.join()

724

self.checker = None

638

725

# Start a new checker if needed

639

726

if self.checker is None:

727

# Escape attributes for the shell

728

escaped_attrs = {

729

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

730

for attr in self.runtime_expansions }

640

731

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

732

command = self.checker_command % escaped_attrs

733

except TypeError as error:

734

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

735

self.checker_command,

736

exc_info=error)

737

return True # Try again later

659

738

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)

739

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

740

self.name)

741

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

742

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

743

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

744

# always replaced by /dev/null.)

745

# The exception is when not debugging but nevertheless

746

# running in the foreground; use the previously

747

# created wnull.

748

popen_args = { "close_fds": True,

749

"shell": True,

750

"cwd": "/" }

751

if (not self.server_settings["debug"]

752

and self.server_settings["foreground"]):

753

popen_args.update({"stdout": wnull,

754

"stderr": wnull })

755

pipe = multiprocessing.Pipe(duplex = False)

756

self.checker = multiprocessing.Process(

757

target = call_pipe,

758

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

759

kwargs = popen_args)

760

self.checker.start()

761

self.checker_callback_tag = gobject.io_add_watch(

762

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

763

self.checker_callback, pipe[0], command)

683

764

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

684

765

return True

685

766

691

772

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

692

773

return

693

774

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

775

self.checker.terminate()

702

776

self.checker = None

703

777

704

778

705

def dbus_service_property(dbus_interface, signature="v",

706

access="readwrite", byte_arrays=False):

779

def dbus_service_property(dbus_interface,

780

signature="v",

781

access="readwrite",

782

byte_arrays=False):

707

783

"""Decorators for marking methods of a DBusObjectWithProperties to

708

784

become properties on the D-Bus.

709

785

718

794

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

719

795

if byte_arrays and signature != "ay":

720

796

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

721

" signature %r" % signature)

797

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

798

722

799

def decorator(func):

723

800

func._dbus_is_property = True

724

801

func._dbus_interface = dbus_interface

729

806

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

730

807

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

731

808

return func

809

810

return decorator

811

812

813

def dbus_interface_annotations(dbus_interface):

814

"""Decorator for marking functions returning interface annotations

815

816

Usage:

817

818

@dbus_interface_annotations("org.example.Interface")

819

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

820

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

821

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

822

"false"}

823

"""

824

825

def decorator(func):

826

func._dbus_is_interface = True

827

func._dbus_interface = dbus_interface

828

func._dbus_name = dbus_interface

829

return func

830

831

return decorator

832

833

834

def dbus_annotations(annotations):

835

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

836

Usage:

837

838

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

839

"org.freedesktop.DBus.Property."

840

"EmitsChangedSignal": "false"})

841

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

842

access="r")

843

def Property_dbus_property(self):

844

return dbus.Boolean(False)

845

"""

846

847

def decorator(func):

848

func._dbus_annotations = annotations

849

return func

850

732

851

return decorator

733

852

734

853

735

854

class DBusPropertyException(dbus.exceptions.DBusException):

736

855

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

737

856

"""

738

def __unicode__(self):

739

return unicode(str(self))

857

pass

740

858

741

859

742

860

class DBusPropertyAccessException(DBusPropertyException):

760

878

"""

761

879

762

880

@staticmethod

763

def _is_dbus_property(obj):

764

return getattr(obj, "_dbus_is_property", False)

881

def _is_dbus_thing(thing):

882

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

883

884

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

885

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

886

"""

887

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

888

False)

765

889

766

def _get_all_dbus_properties(self):

890

def _get_all_dbus_things(self, thing):

767

891

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

768

892

"""

769

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

893

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

894

athing.__get__(self))

770

895

for cls in self.__class__.__mro__

771

for name, prop in

772

inspect.getmembers(cls, self._is_dbus_property))

896

for name, athing in

897

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

773

898

774

899

def _get_dbus_property(self, interface_name, property_name):

775

900

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

776

901

property with the specified name and interface.

777

902

"""

778

for cls in self.__class__.__mro__:

779

for name, value in (inspect.getmembers

780

(cls, self._is_dbus_property)):

903

for cls in self.__class__.__mro__:

904

for name, value in inspect.getmembers(

905

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

781

906

if (value._dbus_name == property_name

782

907

and value._dbus_interface == interface_name):

783

908

return value.__get__(self)

784

909

785

910

# No such property

786

raise DBusPropertyNotFound(self.dbus_object_path + ":"

787

+ interface_name + "."

788

+ property_name)

911

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

912

self.dbus_object_path, interface_name, property_name))

789

913

790

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

914

@dbus.service.method(dbus.PROPERTIES_IFACE,

915

in_signature="ss",

791

916

out_signature="v")

792

917

def Get(self, interface_name, property_name):

793

918

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

811

936

# The byte_arrays option is not supported yet on

812

937

# signatures other than "ay".

813

938

if prop._dbus_signature != "ay":

814

raise ValueError

815

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

816

for byte in value))

939

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

940

"'ay' signature {!r}"

941

.format(prop._dbus_signature))

942

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

943

for byte in value))

817

944

prop(value)

818

945

819

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

946

@dbus.service.method(dbus.PROPERTIES_IFACE,

947

in_signature="s",

820

948

out_signature="a{sv}")

821

949

def GetAll(self, interface_name):

822

950

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

825

953

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

826

954

"""

827

955

properties = {}

828

for name, prop in self._get_all_dbus_properties():

956

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

829

957

if (interface_name

830

958

and interface_name != prop._dbus_interface):

831

959

# Interface non-empty but did not match

837

965

if not hasattr(value, "variant_level"):

838

966

properties[name] = value

839

967

continue

840

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

841

value.variant_level+1)

968

properties[name] = type(value)(

969

value, variant_level = value.variant_level + 1)

842

970

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

843

971

972

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

973

def PropertiesChanged(self, interface_name, changed_properties,

974

invalidated_properties):

975

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

976

standard.

977

"""

978

pass

979

844

980

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

845

981

out_signature="s",

846

982

path_keyword='object_path',

847

983

connection_keyword='connection')

848

984

def Introspect(self, object_path, connection):

849

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

985

"""Overloading of standard D-Bus method.

986

987

Inserts property tags and interface annotation tags.

850

988

"""

851

989

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

852

990

connection)

853

991

try:

854

992

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

993

855

994

def make_tag(document, name, prop):

856

995

e = document.createElement("property")

857

996

e.setAttribute("name", name)

858

997

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

859

998

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

860

999

return e

1000

861

1001

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

1002

# Add property tags

862

1003

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

863

1004

for name, prop

864

in self._get_all_dbus_properties()

1005

in self._get_all_dbus_things("property")

865

1006

if prop._dbus_interface

866

1007

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

867

1008

if_tag.appendChild(tag)

1009

# Add annotation tags

1010

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

1011

for tag in if_tag.getElementsByTagName(typ):

1012

annots = dict()

1013

for name, prop in (self.

1014

_get_all_dbus_things(typ)):

1015

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

1016

and prop._dbus_interface

1017

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

1018

annots.update(getattr(

1019

prop, "_dbus_annotations", {}))

1020

for name, value in annots.items():

1021

ann_tag = document.createElement(

1022

"annotation")

1023

ann_tag.setAttribute("name", name)

1024

ann_tag.setAttribute("value", value)

1025

tag.appendChild(ann_tag)

1026

# Add interface annotation tags

1027

for annotation, value in dict(

1028

itertools.chain.from_iterable(

1029

annotations().items()

1030

for name, annotations

1031

in self._get_all_dbus_things("interface")

1032

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

1033

)).items():

1034

ann_tag = document.createElement("annotation")

1035

ann_tag.setAttribute("name", annotation)

1036

ann_tag.setAttribute("value", value)

1037

if_tag.appendChild(ann_tag)

868

1038

# Add the names to the return values for the

869

1039

# "org.freedesktop.DBus.Properties" methods

870

1040

if (if_tag.getAttribute("name")

885

1055

except (AttributeError, xml.dom.DOMException,

886

1056

xml.parsers.expat.ExpatError) as error:

887

1057

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

888

error)

1058

exc_info=error)

889

1059

return xmlstring

890

1060

891

1061

892

def datetime_to_dbus (dt, variant_level=0):

1062

def datetime_to_dbus(dt, variant_level=0):

893

1063

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

894

1064

if dt is None:

895

1065

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.

1066

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

1067

1068

1069

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1070

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

1071

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

1072

interface names according to the "alt_interface_names" mapping.

1073

Usage:

1074

1075

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

1076

"net.example.AlternateInterface"})

1077

class SampleDBusObject(dbus.service.Object):

1078

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

1079

def SampleDBusMethod():

1080

pass

1081

1082

The above "SampleDBusMethod" on "SampleDBusObject" will be

1083

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

1084

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

1085

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

1086

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

1087

1088

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

1089

(from DBusObjectWithProperties) and interfaces (from the

1090

dbus_interface_annotations decorator).

904

1091

"""

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):

1092

1093

def wrapper(cls):

1094

for orig_interface_name, alt_interface_name in (

1095

alt_interface_names.items()):

1096

attr = {}

1097

interface_names = set()

1098

# Go though all attributes of the class

1099

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

912

1100

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

913

1101

# with the wrong interface name

914

1102

if (not hasattr(attribute, "_dbus_interface")

915

or not attribute._dbus_interface

916

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

1103

or not attribute._dbus_interface.startswith(

1104

orig_interface_name)):

917

1105

continue

918

1106

# Create an alternate D-Bus interface name based on

919

1107

# the current name

920

alt_interface = (attribute._dbus_interface

921

.replace("se.recompile.Mandos",

922

"se.bsnet.fukt.Mandos"))

1108

alt_interface = attribute._dbus_interface.replace(

1109

orig_interface_name, alt_interface_name)

1110

interface_names.add(alt_interface)

923

1111

# Is this a D-Bus signal?

924

1112

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

925

# Extract the original non-method function by

926

# black magic

927

nonmethod_func = (dict(

1113

if sys.version_info.major == 2:

1114

# Extract the original non-method undecorated

1115

# function by black magic

1116

nonmethod_func = (dict(

928

1117

zip(attribute.func_code.co_freevars,

929

attribute.__closure__))["func"]

930

.cell_contents)

1118

attribute.__closure__))

1119

["func"].cell_contents)

1120

else:

1121

nonmethod_func = attribute

931

1122

# Create a new, but exactly alike, function

932

1123

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

933

1124

# 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)))

1125

if sys.version_info.major == 2:

1126

new_function = types.FunctionType(

1127

nonmethod_func.func_code,

1128

nonmethod_func.func_globals,

1129

nonmethod_func.func_name,

1130

nonmethod_func.func_defaults,

1131

nonmethod_func.func_closure)

1132

else:

1133

new_function = types.FunctionType(

1134

nonmethod_func.__code__,

1135

nonmethod_func.__globals__,

1136

nonmethod_func.__name__,

1137

nonmethod_func.__defaults__,

1138

nonmethod_func.__closure__)

1139

new_function = (dbus.service.signal(

1140

alt_interface,

1141

attribute._dbus_signature)(new_function))

1142

# Copy annotations, if any

1143

try:

1144

new_function._dbus_annotations = dict(

1145

attribute._dbus_annotations)

1146

except AttributeError:

1147

pass

943

1148

# 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

1149

# original and alternate functions, so both the

1150

# original and alternate signals gets sent when

1151

# the function is called

946

1152

def fixscope(func1, func2):

947

1153

"""This function is a scope container to pass

948

1154

func1 and func2 to the "call_both" function

949

1155

outside of its arguments"""

1156

950

1157

def call_both(*args, **kwargs):

951

1158

"""This function will emit two D-Bus

952

1159

signals by calling func1 and func2"""

953

1160

func1(*args, **kwargs)

954

1161

func2(*args, **kwargs)

1162

955

1163

return call_both

956

1164

# Create the "call_both" function and add it to

957

1165

# the class

958

attr[attrname] = fixscope(attribute,

959

new_function)

1166

attr[attrname] = fixscope(attribute, new_function)

960

1167

# Is this a D-Bus method?

961

1168

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

962

1169

# Create a new, but exactly alike, function

963

1170

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

964

1171

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

965

1172

# 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)))

1173

attr[attrname] = (

1174

dbus.service.method(

1175

alt_interface,

1176

attribute._dbus_in_signature,

1177

attribute._dbus_out_signature)

1178

(types.FunctionType(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1183

# Copy annotations, if any

1184

try:

1185

attr[attrname]._dbus_annotations = dict(

1186

attribute._dbus_annotations)

1187

except AttributeError:

1188

pass

976

1189

# Is this a D-Bus property?

977

1190

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

978

1191

# Create a new, but exactly alike, function

979

1192

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

980

1193

# property with the alternate D-Bus interface

981

1194

# 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

1195

attr[attrname] = (dbus_service_property(

1196

alt_interface, attribute._dbus_signature,

1197

attribute._dbus_access,

1198

attribute._dbus_get_args_options

1199

["byte_arrays"])

1200

(types.FunctionType(

1201

attribute.func_code,

1202

attribute.func_globals,

1203

attribute.func_name,

1204

attribute.func_defaults,

1205

attribute.func_closure)))

1206

# Copy annotations, if any

1207

try:

1208

attr[attrname]._dbus_annotations = dict(

1209

attribute._dbus_annotations)

1210

except AttributeError:

1211

pass

1212

# Is this a D-Bus interface?

1213

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

1214

# Create a new, but exactly alike, function

1215

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

1216

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

1217

# to the class.

1218

attr[attrname] = (

1219

dbus_interface_annotations(alt_interface)

1220

(types.FunctionType(attribute.func_code,

1221

attribute.func_globals,

1222

attribute.func_name,

1223

attribute.func_defaults,

1224

attribute.func_closure)))

1225

if deprecate:

1226

# Deprecate all alternate interfaces

1227

iname="_AlternateDBusNames_interface_annotation{}"

1228

for interface_name in interface_names:

1229

1230

@dbus_interface_annotations(interface_name)

1231

def func(self):

1232

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

1233

"true" }

1234

# Find an unused name

1235

for aname in (iname.format(i)

1236

for i in itertools.count()):

1237

if aname not in attr:

1238

attr[aname] = func

1239

break

1240

if interface_names:

1241

# Replace the class with a new subclass of it with

1242

# methods, signals, etc. as created above.

1243

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

1244

(cls, ), attr)

1245

return cls

1246

1247

return wrapper

1248

1249

1250

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

1251

"se.bsnet.fukt.Mandos"})

998

1252

class ClientDBus(Client, DBusObjectWithProperties):

999

1253

"""A Client class using D-Bus

1000

1254

1004

1258

"""

1005

1259

1006

1260

runtime_expansions = (Client.runtime_expansions

1007

+ ("dbus_object_path",))

1261

+ ("dbus_object_path", ))

1262

1263

_interface = "se.recompile.Mandos.Client"

1008

1264

1009

1265

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

1010

1266

1011

1267

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

1012

1268

self.bus = bus

1013

1269

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

1014

1015

self._approvals_pending = 0

1016

1270

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

1017

1271

# the D-Bus

1018

client_object_name = unicode(self.name).translate(

1272

client_object_name = str(self.name).translate(

1019

1273

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

1020

1274

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

1021

self.dbus_object_path = (dbus.ObjectPath

1022

("/clients/" + client_object_name))

1275

self.dbus_object_path = dbus.ObjectPath(

1276

"/clients/" + client_object_name)

1023

1277

DBusObjectWithProperties.__init__(self, self.bus,

1024

1278

self.dbus_object_path)

1025

1026

def notifychangeproperty(transform_func,

1027

dbus_name, type_func=lambda x: x,

1028

variant_level=1):

1279

1280

def notifychangeproperty(transform_func, dbus_name,

1281

type_func=lambda x: x,

1282

variant_level=1,

1283

invalidate_only=False,

1284

_interface=_interface):

1029

1285

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

1030

1286

its changes to DBus.

1031

1287

1036

1292

to the D-Bus. Default: no transform

1037

1293

variant_level: D-Bus variant level. Default: 1

1038

1294

"""

1039

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

1295

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

1296

1040

1297

def setter(self, value):

1041

1298

if hasattr(self, "dbus_object_path"):

1042

1299

if (not hasattr(self, attrname) or

1043

1300

type_func(getattr(self, attrname, None))

1044

1301

!= 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)

1302

if invalidate_only:

1303

self.PropertiesChanged(

1304

_interface, dbus.Dictionary(),

1305

dbus.Array((dbus_name, )))

1306

else:

1307

dbus_value = transform_func(

1308

type_func(value),

1309

variant_level = variant_level)

1310

self.PropertyChanged(dbus.String(dbus_name),

1311

dbus_value)

1312

self.PropertiesChanged(

1313

_interface,

1314

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

1315

dbus_value }),

1316

dbus.Array())

1050

1317

setattr(self, attrname, value)

1051

1318

1052

1319

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

1053

1320

1054

1055

1321

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1056

1322

approvals_pending = notifychangeproperty(dbus.Boolean,

1057

1323

"ApprovalPending",

1059

1325

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

1060

1326

last_enabled = notifychangeproperty(datetime_to_dbus,

1061

1327

"LastEnabled")

1062

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

1063

type_func = lambda checker:

1064

checker is not None)

1328

checker = notifychangeproperty(

1329

dbus.Boolean, "CheckerRunning",

1330

type_func = lambda checker: checker is not None)

1065

1331

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1066

1332

"LastCheckedOK")

1333

last_checker_status = notifychangeproperty(dbus.Int16,

1334

"LastCheckerStatus")

1067

1335

last_approval_request = notifychangeproperty(

1068

1336

datetime_to_dbus, "LastApprovalRequest")

1069

1337

approved_by_default = notifychangeproperty(dbus.Boolean,

1070

1338

"ApprovedByDefault")

1071

approval_delay = notifychangeproperty(dbus.UInt16,

1072

"ApprovalDelay",

1073

type_func =

1074

_timedelta_to_milliseconds)

1339

approval_delay = notifychangeproperty(

1340

dbus.UInt64, "ApprovalDelay",

1341

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

1075

1342

approval_duration = notifychangeproperty(

1076

dbus.UInt16, "ApprovalDuration",

1077

type_func = _timedelta_to_milliseconds)

1343

dbus.UInt64, "ApprovalDuration",

1344

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

1078

1345

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

1079

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

1080

type_func =

1081

_timedelta_to_milliseconds)

1346

timeout = notifychangeproperty(

1347

dbus.UInt64, "Timeout",

1348

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

1082

1349

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)

1350

dbus.UInt64, "ExtendedTimeout",

1351

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

1352

interval = notifychangeproperty(

1353

dbus.UInt64, "Interval",

1354

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

1089

1355

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

1356

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

1357

invalidate_only=True)

1090

1358

1091

1359

del notifychangeproperty

1092

1360

1099

1367

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

1100

1368

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

1101

1369

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)

1370

def checker_callback(self, source, condition,

1371

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

1372

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

1373

connection, command, *args,

1374

**kwargs)

1375

exitstatus = self.last_checker_status

1376

if exitstatus >= 0:

1108

1377

# Emit D-Bus signal

1109

1378

self.CheckerCompleted(dbus.Int16(exitstatus),

1110

dbus.Int64(condition),

1379

dbus.Int64(0),

1111

1380

dbus.String(command))

1112

1381

else:

1113

1382

# Emit D-Bus signal

1114

1383

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

1115

dbus.Int64(condition),

1384

dbus.Int64(

1385

self.last_checker_signal),

1116

1386

dbus.String(command))

1117

1118

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

1119

*args, **kwargs)

1387

return ret

1120

1388

1121

1389

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

1390

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

1127

1391

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

1128

1392

# Only if new checker process was started

1129

1393

if (self.checker is not None

1133

1397

return r

1134

1398

1135

1399

def _reset_approved(self):

1136

self._approved = None

1400

self.approved = None

1137

1401

return False

1138

1402

1139

1403

def approve(self, value=True):

1404

self.approved = value

1405

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

1406

* 1000), self._reset_approved)

1140

1407

self.send_changedstate()

1141

self._approved = value

1142

gobject.timeout_add(_timedelta_to_milliseconds

1143

(self.approval_duration),

1144

self._reset_approved)

1145

1146

1408

1147

1409

## D-Bus methods, signals & properties

1148

_interface = "se.recompile.Mandos.Client"

1410

1411

## Interfaces

1149

1412

1150

1413

## Signals

1151

1414

1162

1425

pass

1163

1426

1164

1427

# PropertyChanged - signal

1428

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

1165

1429

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

1166

1430

def PropertyChanged(self, property, value):

1167

1431

"D-Bus signal"

1188

1452

"D-Bus signal"

1189

1453

return self.need_approval()

1190

1454

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

1455

## Methods

1200

1456

1201

1457

# Approve - method

1239

1495

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

1240

1496

1241

1497

# ApprovedByDefault - property

1242

@dbus_service_property(_interface, signature="b",

1498

@dbus_service_property(_interface,

1499

signature="b",

1243

1500

access="readwrite")

1244

1501

def ApprovedByDefault_dbus_property(self, value=None):

1245

1502

if value is None: # get

1247

1504

self.approved_by_default = bool(value)

1248

1505

1249

1506

# ApprovalDelay - property

1250

@dbus_service_property(_interface, signature="t",

1507

@dbus_service_property(_interface,

1508

signature="t",

1251

1509

access="readwrite")

1252

1510

def ApprovalDelay_dbus_property(self, value=None):

1253

1511

if value is None: # get

1254

return dbus.UInt64(self.approval_delay_milliseconds())

1512

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

1513

* 1000)

1255

1514

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

1256

1515

1257

1516

# ApprovalDuration - property

1258

@dbus_service_property(_interface, signature="t",

1517

@dbus_service_property(_interface,

1518

signature="t",

1259

1519

access="readwrite")

1260

1520

def ApprovalDuration_dbus_property(self, value=None):

1261

1521

if value is None: # get

1262

return dbus.UInt64(_timedelta_to_milliseconds(

1263

self.approval_duration))

1522

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

1523

* 1000)

1264

1524

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

1265

1525

1266

1526

# Name - property

1274

1534

return dbus.String(self.fingerprint)

1275

1535

1276

1536

# Host - property

1277

@dbus_service_property(_interface, signature="s",

1537

@dbus_service_property(_interface,

1538

signature="s",

1278

1539

access="readwrite")

1279

1540

def Host_dbus_property(self, value=None):

1280

1541

if value is None: # get

1281

1542

return dbus.String(self.host)

1282

self.host = value

1543

self.host = str(value)

1283

1544

1284

1545

# Created - property

1285

1546

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

1292

1553

return datetime_to_dbus(self.last_enabled)

1293

1554

1294

1555

# Enabled - property

1295

@dbus_service_property(_interface, signature="b",

1556

@dbus_service_property(_interface,

1557

signature="b",

1296

1558

access="readwrite")

1297

1559

def Enabled_dbus_property(self, value=None):

1298

1560

if value is None: # get

1303

1565

self.disable()

1304

1566

1305

1567

# LastCheckedOK - property

1306

@dbus_service_property(_interface, signature="s",

1568

@dbus_service_property(_interface,

1569

signature="s",

1307

1570

access="readwrite")

1308

1571

def LastCheckedOK_dbus_property(self, value=None):

1309

1572

if value is not None:

1311

1574

return

1312

1575

return datetime_to_dbus(self.last_checked_ok)

1313

1576

1577

# LastCheckerStatus - property

1578

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

1579

def LastCheckerStatus_dbus_property(self):

1580

return dbus.Int16(self.last_checker_status)

1581

1314

1582

# Expires - property

1315

1583

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

1316

1584

def Expires_dbus_property(self):

1322

1590

return datetime_to_dbus(self.last_approval_request)

1323

1591

1324

1592

# Timeout - property

1325

@dbus_service_property(_interface, signature="t",

1593

@dbus_service_property(_interface,

1594

signature="t",

1326

1595

access="readwrite")

1327

1596

def Timeout_dbus_property(self, value=None):

1328

1597

if value is None: # get

1329

return dbus.UInt64(self.timeout_milliseconds())

1598

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

1599

old_timeout = self.timeout

1330

1600

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))

1601

# Reschedule disabling

1602

if self.enabled:

1603

now = datetime.datetime.utcnow()

1604

self.expires += self.timeout - old_timeout

1605

if self.expires <= now:

1606

# The timeout has passed

1607

self.disable()

1608

else:

1609

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

1610

is None):

1611

return

1612

gobject.source_remove(self.disable_initiator_tag)

1613

self.disable_initiator_tag = gobject.timeout_add(

1614

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

1615

self.disable)

1351

1616

1352

1617

# ExtendedTimeout - property

1353

@dbus_service_property(_interface, signature="t",

1618

@dbus_service_property(_interface,

1619

signature="t",

1354

1620

access="readwrite")

1355

1621

def ExtendedTimeout_dbus_property(self, value=None):

1356

1622

if value is None: # get

1357

return dbus.UInt64(self.extended_timeout_milliseconds())

1623

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

1624

* 1000)

1358

1625

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

1359

1626

1360

1627

# Interval - property

1361

@dbus_service_property(_interface, signature="t",

1628

@dbus_service_property(_interface,

1629

signature="t",

1362

1630

access="readwrite")

1363

1631

def Interval_dbus_property(self, value=None):

1364

1632

if value is None: # get

1365

return dbus.UInt64(self.interval_milliseconds())

1633

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

1366

1634

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

1367

1635

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

1368

1636

return

1369

1637

if self.enabled:

1370

1638

# Reschedule checker run

1371

1639

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

1640

self.checker_initiator_tag = gobject.timeout_add(

1641

value, self.start_checker)

1642

self.start_checker() # Start one now, too

1375

1643

1376

1644

# Checker - property

1377

@dbus_service_property(_interface, signature="s",

1645

@dbus_service_property(_interface,

1646

signature="s",

1378

1647

access="readwrite")

1379

1648

def Checker_dbus_property(self, value=None):

1380

1649

if value is None: # get

1381

1650

return dbus.String(self.checker_command)

1382

self.checker_command = value

1651

self.checker_command = str(value)

1383

1652

1384

1653

# CheckerRunning - property

1385

@dbus_service_property(_interface, signature="b",

1654

@dbus_service_property(_interface,

1655

signature="b",

1386

1656

access="readwrite")

1387

1657

def CheckerRunning_dbus_property(self, value=None):

1388

1658

if value is None: # get

1398

1668

return self.dbus_object_path # is already a dbus.ObjectPath

1399

1669

1400

1670

# Secret = property

1401

@dbus_service_property(_interface, signature="ay",

1402

access="write", byte_arrays=True)

1671

@dbus_service_property(_interface,

1672

signature="ay",

1673

access="write",

1674

byte_arrays=True)

1403

1675

def Secret_dbus_property(self, value):

1404

self.secret = str(value)

1676

self.secret = bytes(value)

1405

1677

1406

1678

del _interface

1407

1679

1411

1683

self._pipe = child_pipe

1412

1684

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

1413

1685

if not self._pipe.recv():

1414

raise KeyError()

1686

raise KeyError(fpr)

1415

1687

1416

1688

def __getattribute__(self, name):

1417

if(name == '_pipe'):

1689

if name == '_pipe':

1418

1690

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

1419

1691

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

1420

1692

data = self._pipe.recv()

1421

1693

if data[0] == 'data':

1422

1694

return data[1]

1423

1695

if data[0] == 'function':

1696

1424

1697

def func(*args, **kwargs):

1425

1698

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

1426

1699

return self._pipe.recv()[1]

1700

1427

1701

return func

1428

1702

1429

1703

def __setattr__(self, name, value):

1430

if(name == '_pipe'):

1704

if name == '_pipe':

1431

1705

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

1432

1706

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

1433

1707

1434

1708

1435

class ClientDBusTransitional(ClientDBus):

1436

__metaclass__ = AlternateDBusNamesMetaclass

1437

1438

1439

1709

class ClientHandler(socketserver.BaseRequestHandler, object):

1440

1710

"""A class to handle client connections.

1441

1711

1445

1715

def handle(self):

1446

1716

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

1447

1717

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

1448

unicode(self.client_address))

1718

str(self.client_address))

1449

1719

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

1450

1720

self.server.child_pipe.fileno())

1451

1721

1452

session = (gnutls.connection

1453

.ClientSession(self.request,

1454

gnutls.connection

1455

.X509Credentials()))

1722

session = gnutls.connection.ClientSession(

1723

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

1456

1724

1457

1725

# Note: gnutls.connection.X509Credentials is really a

1458

1726

# generic GnuTLS certificate credentials object so long as

1467

1735

priority = self.server.gnutls_priority

1468

1736

if priority is None:

1469

1737

priority = "NORMAL"

1470

(gnutls.library.functions

1471

.gnutls_priority_set_direct(session._c_object,

1472

priority, None))

1738

gnutls.library.functions.gnutls_priority_set_direct(

1739

session._c_object, priority, None)

1473

1740

1474

1741

# Start communication using the Mandos protocol

1475

1742

# Get protocol number

1477

1744

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

1478

1745

try:

1479

1746

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

1480

raise RuntimeError

1747

raise RuntimeError(line)

1481

1748

except (ValueError, IndexError, RuntimeError) as error:

1482

1749

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

1483

1750

return

1495

1762

approval_required = False

1496

1763

try:

1497

1764

try:

1498

fpr = self.fingerprint(self.peer_certificate

1499

(session))

1765

fpr = self.fingerprint(

1766

self.peer_certificate(session))

1500

1767

except (TypeError,

1501

1768

gnutls.errors.GNUTLSError) as error:

1502

1769

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

1503

1770

return

1504

1771

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

1505

if self.server.use_dbus:

1506

# Emit D-Bus signal

1507

client.NewRequest(str(self.client_address))

1508

1772

1509

1773

try:

1510

1774

client = ProxyClient(child_pipe, fpr,

1520

1784

while True:

1521

1785

if not client.enabled:

1522

1786

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

1523

client.name)

1787

client.name)

1524

1788

if self.server.use_dbus:

1525

1789

# Emit D-Bus signal

1526

1790

client.Rejected("Disabled")

1527

1791

return

1528

1792

1529

if client._approved or not client.approval_delay:

1793

if client.approved or not client.approval_delay:

1530

1794

#We are approved or approval is disabled

1531

1795

break

1532

elif client._approved is None:

1796

elif client.approved is None:

1533

1797

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

1534

1798

client.name)

1535

1799

if self.server.use_dbus:

1536

1800

# Emit D-Bus signal

1537

1801

client.NeedApproval(

1538

client.approval_delay_milliseconds(),

1539

client.approved_by_default)

1802

client.approval_delay.total_seconds()

1803

* 1000, client.approved_by_default)

1540

1804

else:

1541

1805

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

1542

1806

client.name)

1548

1812

#wait until timeout or approved

1549

1813

time = datetime.datetime.now()

1550

1814

client.changedstate.acquire()

1551

(client.changedstate.wait

1552

(float(client._timedelta_to_milliseconds(delay)

1553

/ 1000)))

1815

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

1554

1816

client.changedstate.release()

1555

1817

time2 = datetime.datetime.now()

1556

1818

if (time2 - time) >= delay:

1572

1834

try:

1573

1835

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

1574

1836

except gnutls.errors.GNUTLSError as error:

1575

logger.warning("gnutls send failed")

1837

logger.warning("gnutls send failed",

1838

exc_info=error)

1576

1839

return

1577

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

1578

sent, len(client.secret)

1579

- (sent_size + sent))

1840

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

1841

len(client.secret) - (sent_size

1842

+ sent))

1580

1843

sent_size += sent

1581

1844

1582

1845

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

1583

1846

# bump the timeout using extended_timeout

1584

client.checked_ok(client.extended_timeout)

1847

client.bump_timeout(client.extended_timeout)

1585

1848

if self.server.use_dbus:

1586

1849

# Emit D-Bus signal

1587

1850

client.GotSecret()

1592

1855

try:

1593

1856

session.bye()

1594

1857

except gnutls.errors.GNUTLSError as error:

1595

logger.warning("GnuTLS bye failed")

1858

logger.warning("GnuTLS bye failed",

1859

exc_info=error)

1596

1860

1597

1861

@staticmethod

1598

1862

def peer_certificate(session):

1599

1863

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

1600

1864

# If not an OpenPGP certificate...

1601

if (gnutls.library.functions

1602

.gnutls_certificate_type_get(session._c_object)

1865

if (gnutls.library.functions.gnutls_certificate_type_get(

1866

session._c_object)

1603

1867

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1604

1868

# ...do the normal thing

1605

1869

return session.peer_certificate

1619

1883

def fingerprint(openpgp):

1620

1884

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1621

1885

# 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))))

1886

datum = gnutls.library.types.gnutls_datum_t(

1887

ctypes.cast(ctypes.c_char_p(openpgp),

1888

ctypes.POINTER(ctypes.c_ubyte)),

1889

ctypes.c_uint(len(openpgp)))

1627

1890

# New empty GnuTLS certificate

1628

1891

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1629

(gnutls.library.functions

1630

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1892

gnutls.library.functions.gnutls_openpgp_crt_init(

1893

ctypes.byref(crt))

1631

1894

# 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))

1895

gnutls.library.functions.gnutls_openpgp_crt_import(

1896

crt, ctypes.byref(datum),

1897

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1636

1898

# Verify the self signature in the key

1637

1899

crtverify = ctypes.c_uint()

1638

(gnutls.library.functions

1639

.gnutls_openpgp_crt_verify_self(crt, 0,

1640

ctypes.byref(crtverify)))

1900

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1901

crt, 0, ctypes.byref(crtverify))

1641

1902

if crtverify.value != 0:

1642

1903

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1643

raise (gnutls.errors.CertificateSecurityError

1644

("Verify failed"))

1904

raise gnutls.errors.CertificateSecurityError(

1905

"Verify failed")

1645

1906

# New buffer for the fingerprint

1646

1907

buf = ctypes.create_string_buffer(20)

1647

1908

buf_len = ctypes.c_size_t()

1648

1909

# 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)))

1910

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1911

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

1652

1912

# Deinit the certificate

1653

1913

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1654

1914

# Convert the buffer to a Python bytestring

1660

1920

1661

1921

class MultiprocessingMixIn(object):

1662

1922

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

1923

1663

1924

def sub_process_main(self, request, address):

1664

1925

try:

1665

1926

self.finish_request(request, address)

1666

except:

1927

except Exception:

1667

1928

self.handle_error(request, address)

1668

1929

self.close_request(request)

1669

1930

1670

1931

def process_request(self, request, address):

1671

1932

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

1672

1933

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

1673

args = (request,

1674

address))

1934

args = (request, address))

1675

1935

proc.start()

1676

1936

return proc

1677

1937

1678

1938

1679

1939

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1680

1940

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

1941

1681

1942

def process_request(self, request, client_address):

1682

1943

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

1683

1944

1692

1953

1693

1954

def add_pipe(self, parent_pipe, proc):

1694

1955

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

1695

raise NotImplementedError

1956

raise NotImplementedError()

1696

1957

1697

1958

1698

1959

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1704

1965

interface: None or a network interface name (string)

1705

1966

use_ipv6: Boolean; to use IPv6 or not

1706

1967

"""

1968

1707

1969

def __init__(self, server_address, RequestHandlerClass,

1708

interface=None, use_ipv6=True):

1970

interface=None,

1971

use_ipv6=True,

1972

socketfd=None):

1973

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

1974

creating a new one with socket.socket().

1975

"""

1709

1976

self.interface = interface

1710

1977

if use_ipv6:

1711

1978

self.address_family = socket.AF_INET6

1979

if socketfd is not None:

1980

# Save the file descriptor

1981

self.socketfd = socketfd

1982

# Save the original socket.socket() function

1983

self.socket_socket = socket.socket

1984

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

1985

#

1986

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

1987

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

1988

# patching socket.socket.)

1989

#

1990

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

1991

@functools.wraps(socket.socket)

1992

def socket_wrapper(*args, **kwargs):

1993

# Restore original function so subsequent calls are

1994

# not affected.

1995

socket.socket = self.socket_socket

1996

del self.socket_socket

1997

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

1998

# saved file descriptor.

1999

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

2000

# Replace socket.socket() function with wrapper

2001

socket.socket = socket_wrapper

2002

# The socketserver.TCPServer.__init__ will call

2003

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

2004

# socket_wrapper(), if socketfd was set.

1712

2005

socketserver.TCPServer.__init__(self, server_address,

1713

2006

RequestHandlerClass)

2007

1714

2008

def server_bind(self):

1715

2009

"""This overrides the normal server_bind() function

1716

2010

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

1722

2016

self.interface)

1723

2017

else:

1724

2018

try:

1725

self.socket.setsockopt(socket.SOL_SOCKET,

1726

SO_BINDTODEVICE,

1727

str(self.interface

1728

+ '\0'))

2019

self.socket.setsockopt(

2020

socket.SOL_SOCKET, SO_BINDTODEVICE,

2021

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

1729

2022

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:

2023

if error.errno == errno.EPERM:

2024

logger.error("No permission to bind to"

2025

" interface %s", self.interface)

2026

elif error.errno == errno.ENOPROTOOPT:

1735

2027

logger.error("SO_BINDTODEVICE not available;"

1736

2028

" cannot bind to interface %s",

1737

2029

self.interface)

2030

elif error.errno == errno.ENODEV:

2031

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

2032

" cannot bind", self.interface)

1738

2033

else:

1739

2034

raise

1740

2035

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

1743

2038

if self.address_family == socket.AF_INET6:

1744

2039

any_address = "::" # in6addr_any

1745

2040

else:

1746

any_address = socket.INADDR_ANY

2041

any_address = "0.0.0.0" # INADDR_ANY

1747

2042

self.server_address = (any_address,

1748

2043

self.server_address[1])

1749

2044

elif not self.server_address[1]:

1750

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

1751

0)

2045

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

1752

2046

# if self.interface:

1753

2047

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

1754

2048

# 0, # port

1768

2062

1769

2063

Assumes a gobject.MainLoop event loop.

1770

2064

"""

2065

1771

2066

def __init__(self, server_address, RequestHandlerClass,

1772

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

1773

gnutls_priority=None, use_dbus=True):

2067

interface=None,

2068

use_ipv6=True,

2069

clients=None,

2070

gnutls_priority=None,

2071

use_dbus=True,

2072

socketfd=None):

1774

2073

self.enabled = False

1775

2074

self.clients = clients

1776

2075

if self.clients is None:

1780

2079

IPv6_TCPServer.__init__(self, server_address,

1781

2080

RequestHandlerClass,

1782

2081

interface = interface,

1783

use_ipv6 = use_ipv6)

2082

use_ipv6 = use_ipv6,

2083

socketfd = socketfd)

2084

1784

2085

def server_activate(self):

1785

2086

if self.enabled:

1786

2087

return socketserver.TCPServer.server_activate(self)

1790

2091

1791

2092

def add_pipe(self, parent_pipe, proc):

1792

2093

# 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))

2094

gobject.io_add_watch(

2095

parent_pipe.fileno(),

2096

gobject.IO_IN | gobject.IO_HUP,

2097

functools.partial(self.handle_ipc,

2098

parent_pipe = parent_pipe,

2099

proc = proc))

1799

2100

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)

2101

def handle_ipc(self, source, condition,

2102

parent_pipe=None,

2103

proc = None,

2104

client_object=None):

1816

2105

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

1817

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

2106

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

1818

2107

# Wait for other process to exit

1819

2108

proc.join()

1820

2109

return False

1841

2130

parent_pipe.send(False)

1842

2131

return False

1843

2132

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))

2133

gobject.io_add_watch(

2134

parent_pipe.fileno(),

2135

gobject.IO_IN | gobject.IO_HUP,

2136

functools.partial(self.handle_ipc,

2137

parent_pipe = parent_pipe,

2138

proc = proc,

2139

client_object = client))

1852

2140

parent_pipe.send(True)

1853

2141

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

1854

2142

# same fileno

1860

2148

1861

2149

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

1862

2150

funcname)(*args,

1863

**kwargs)))

2151

**kwargs)))

1864

2152

1865

2153

if command == 'getattr':

1866

2154

attrname = request[1]

1867

if callable(client_object.__getattribute__(attrname)):

1868

parent_pipe.send(('function',))

2155

if isinstance(client_object.__getattribute__(attrname),

2156

collections.Callable):

2157

parent_pipe.send(('function', ))

1869

2158

else:

1870

parent_pipe.send(('data', client_object

1871

.__getattribute__(attrname)))

2159

parent_pipe.send((

2160

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

1872

2161

1873

2162

if command == 'setattr':

1874

2163

attrname = request[1]

1878

2167

return True

1879

2168

1880

2169

2170

def rfc3339_duration_to_delta(duration):

2171

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

2172

2173

>>> rfc3339_duration_to_delta("P7D")

2174

datetime.timedelta(7)

2175

>>> rfc3339_duration_to_delta("PT60S")

2176

datetime.timedelta(0, 60)

2177

>>> rfc3339_duration_to_delta("PT60M")

2178

datetime.timedelta(0, 3600)

2179

>>> rfc3339_duration_to_delta("PT24H")

2180

datetime.timedelta(1)

2181

>>> rfc3339_duration_to_delta("P1W")

2182

datetime.timedelta(7)

2183

>>> rfc3339_duration_to_delta("PT5M30S")

2184

datetime.timedelta(0, 330)

2185

>>> rfc3339_duration_to_delta("P1DT3M20S")

2186

datetime.timedelta(1, 200)

2187

"""

2188

2189

# Parsing an RFC 3339 duration with regular expressions is not

2190

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

2191

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

2192

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

2193

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

2194

# avoid excessive use of external libraries.

2195

2196

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

2197

Token = collections.namedtuple("Token", (

2198

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

2199

# a "group" containing digits

2200

"value", # datetime.timedelta or None

2201

"followers")) # Tokens valid after this token

2202

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

2203

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

2204

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

2205

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

2206

datetime.timedelta(seconds=1),

2207

frozenset((token_end, )))

2208

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

2209

datetime.timedelta(minutes=1),

2210

frozenset((token_second, token_end)))

2211

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

2212

datetime.timedelta(hours=1),

2213

frozenset((token_minute, token_end)))

2214

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

2215

None,

2216

frozenset((token_hour, token_minute,

2217

token_second)))

2218

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

2219

datetime.timedelta(days=1),

2220

frozenset((token_time, token_end)))

2221

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

2222

datetime.timedelta(weeks=4),

2223

frozenset((token_day, token_end)))

2224

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

2225

datetime.timedelta(weeks=52),

2226

frozenset((token_month, token_end)))

2227

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

2228

datetime.timedelta(weeks=1),

2229

frozenset((token_end, )))

2230

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

2231

frozenset((token_year, token_month,

2232

token_day, token_time,

2233

token_week)))

2234

# Define starting values

2235

value = datetime.timedelta() # Value so far

2236

found_token = None

2237

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

2238

s = duration # String left to parse

2239

# Loop until end token is found

2240

while found_token is not token_end:

2241

# Search for any currently valid tokens

2242

for token in followers:

2243

match = token.regexp.match(s)

2244

if match is not None:

2245

# Token found

2246

if token.value is not None:

2247

# Value found, parse digits

2248

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

2249

# Add to value so far

2250

value += factor * token.value

2251

# Strip token from string

2252

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

2253

# Go to found token

2254

found_token = token

2255

# Set valid next tokens

2256

followers = found_token.followers

2257

break

2258

else:

2259

# No currently valid tokens were found

2260

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

2261

.format(duration))

2262

# End token found

2263

return value

2264

2265

1881

2266

def string_to_delta(interval):

1882

2267

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

1883

2268

1894

2279

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

1895

2280

datetime.timedelta(0, 330)

1896

2281

"""

2282

2283

try:

2284

return rfc3339_duration_to_delta(interval)

2285

except ValueError:

2286

pass

2287

1897

2288

timevalue = datetime.timedelta(0)

1898

2289

for s in interval.split():

1899

2290

try:

1900

suffix = unicode(s[-1])

2291

suffix = s[-1]

1901

2292

value = int(s[:-1])

1902

2293

if suffix == "d":

1903

2294

delta = datetime.timedelta(value)

1910

2301

elif suffix == "w":

1911

2302

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

1912

2303

else:

1913

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

1914

except (ValueError, IndexError) as e:

2304

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

2305

except IndexError as e:

1915

2306

raise ValueError(*(e.args))

1916

2307

timevalue += delta

1917

2308

return timevalue

1930

2321

sys.exit()

1931

2322

if not noclose:

1932

2323

# Close all standard open file descriptors

1933

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

2324

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

1934

2325

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

1935

2326

raise OSError(errno.ENODEV,

1936

"%s not a character device"

1937

% os.path.devnull)

2327

"{} not a character device"

2328

.format(os.devnull))

1938

2329

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

1939

2330

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

1940

2331

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

1949

2340

1950

2341

parser = argparse.ArgumentParser()

1951

2342

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

1952

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

2343

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

1953

2344

help="show version number and exit")

1954

2345

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

1955

2346

help="Bind to interface IF")

1961

2352

help="Run self-test")

1962

2353

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

1963

2354

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

1964

" to terminal")

2355

" to terminal", default=None)

1965

2356

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

1966

2357

help="Debug level for stdout output")

1967

2358

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

1974

2365

" files")

1975

2366

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

1976

2367

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

1977

" system bus interface")

2368

" system bus interface", default=None)

1978

2369

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

1979

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

2370

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

2371

default=None)

1980

2372

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

1981

2373

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

1982

" state")

2374

" state", default=None)

2375

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

2376

help="Specify a file descriptor to a network"

2377

" socket to use instead of creating one")

1983

2378

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

1984

2379

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

2380

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

2381

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

2382

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

2383

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

2384

default=None)

1985

2385

1986

2386

options = parser.parse_args()

1987

2387

1988

2388

if options.check:

1989

2389

import doctest

1990

doctest.testmod()

1991

sys.exit()

2390

fail_count, test_count = doctest.testmod()

2391

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

1992

2392

1993

2393

# Default values for config file for server-global settings

1994

2394

server_defaults = { "interface": "",

1996

2396

"port": "",

1997

2397

"debug": "False",

1998

2398

"priority":

1999

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

2399

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

2400

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

2000

2401

"servicename": "Mandos",

2001

2402

"use_dbus": "True",

2002

2403

"use_ipv6": "True",

2003

2404

"debuglevel": "",

2004

2405

"restore": "True",

2005

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

2006

}

2406

"socket": "",

2407

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

2408

"foreground": "False",

2409

"zeroconf": "True",

2410

}

2007

2411

2008

2412

# Parse config file for server-global settings

2009

2413

server_config = configparser.SafeConfigParser(server_defaults)

2010

2414

del server_defaults

2011

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

2012

"mandos.conf"))

2415

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

2013

2416

# Convert the SafeConfigParser object to a dict

2014

2417

server_settings = server_config.defaults()

2015

2418

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

2016

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

2419

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

2017

2420

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

2018

2421

option)

2019

2422

if server_settings["port"]:

2020

2423

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

2021

2424

"port")

2425

if server_settings["socket"]:

2426

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

2427

"socket")

2428

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

2429

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

2430

# happen with a supplied network socket.

2431

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

2432

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

2433

["socket"])

2022

2434

del server_config

2023

2435

2024

2436

# Override the settings from the config file with command line

2025

2437

# options, if set.

2026

2438

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

2027

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

2028

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

2029

"statedir"):

2439

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

2440

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

2441

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

2030

2442

value = getattr(options, option)

2031

2443

if value is not None:

2032

2444

server_settings[option] = value

2033

2445

del options

2034

2446

# Force all strings to be unicode

2035

2447

for option in server_settings.keys():

2036

if type(server_settings[option]) is str:

2037

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

2448

if isinstance(server_settings[option], bytes):

2449

server_settings[option] = (server_settings[option]

2450

.decode("utf-8"))

2451

# Force all boolean options to be boolean

2452

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

2453

"foreground", "zeroconf"):

2454

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

2455

# Debug implies foreground

2456

if server_settings["debug"]:

2457

server_settings["foreground"] = True

2038

2458

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

2039

2459

2040

2460

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

2041

2461

2462

if (not server_settings["zeroconf"]

2463

and not (server_settings["port"]

2464

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

2465

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

2466

2042

2467

# For convenience

2043

2468

debug = server_settings["debug"]

2044

2469

debuglevel = server_settings["debuglevel"]

2046

2471

use_ipv6 = server_settings["use_ipv6"]

2047

2472

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

2048

2473

stored_state_file)

2474

foreground = server_settings["foreground"]

2475

zeroconf = server_settings["zeroconf"]

2049

2476

2050

2477

if debug:

2051

initlogger(logging.DEBUG)

2478

initlogger(debug, logging.DEBUG)

2052

2479

else:

2053

2480

if not debuglevel:

2054

initlogger()

2481

initlogger(debug)

2055

2482

else:

2056

2483

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

2057

initlogger(level)

2484

initlogger(debug, level)

2058

2485

2059

2486

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

2060

syslogger.setFormatter(logging.Formatter

2061

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

2062

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

2063

% server_settings["servicename"]))

2487

syslogger.setFormatter(

2488

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

2489

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

2490

server_settings["servicename"])))

2064

2491

2065

2492

# 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)

2493

client_config = configparser.SafeConfigParser(Client

2494

.client_defaults)

2075

2495

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

2076

2496

"clients.conf"))

2077

2497

2078

2498

global mandos_dbus_service

2079

2499

mandos_dbus_service = None

2080

2500

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"

2501

socketfd = None

2502

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

2503

socketfd = server_settings["socket"]

2504

tcp_server = MandosServer(

2505

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

2506

ClientHandler,

2507

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

2508

use_ipv6=use_ipv6,

2509

gnutls_priority=server_settings["priority"],

2510

use_dbus=use_dbus,

2511

socketfd=socketfd)

2512

if not foreground:

2513

pidfilename = "/run/mandos.pid"

2514

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

2515

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

2516

pidfile = None

2092

2517

try:

2093

pidfile = open(pidfilename, "w")

2094

except IOError:

2095

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

2518

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

2519

except IOError as e:

2520

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

2521

exc_info=e)

2096

2522

2097

try:

2098

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

2099

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

2100

except KeyError:

2523

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

2101

2524

try:

2102

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

2103

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

2525

uid = pwd.getpwnam(name).pw_uid

2526

gid = pwd.getpwnam(name).pw_gid

2527

break

2104

2528

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

2529

continue

2530

else:

2531

uid = 65534

2532

gid = 65534

2111

2533

try:

2112

2534

os.setgid(gid)

2113

2535

os.setuid(uid)

2114

2536

except OSError as error:

2115

if error[0] != errno.EPERM:

2116

raise error

2537

if error.errno != errno.EPERM:

2538

raise

2117

2539

2118

2540

if debug:

2119

2541

# Enable all possible GnuTLS debugging

2126

2548

def debug_gnutls(level, string):

2127

2549

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

2128

2550

2129

(gnutls.library.functions

2130

.gnutls_global_set_log_function(debug_gnutls))

2551

gnutls.library.functions.gnutls_global_set_log_function(

2552

debug_gnutls)

2131

2553

2132

2554

# Redirect stdin so all checkers get /dev/null

2133

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

2555

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

2134

2556

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

2135

2557

if null > 2:

2136

2558

os.close(null)

2137

else:

2138

# No console logging

2139

logger.removeHandler(console)

2140

2559

2141

2560

# Need to fork before connecting to D-Bus

2142

if not debug:

2561

if not foreground:

2143

2562

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

2144

2563

daemon()

2145

2564

2565

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

2566

# need to inform gobject that threads will be used.

2567

gobject.threads_init()

2568

2146

2569

global main_loop

2147

2570

# From the Avahi example code

2148

DBusGMainLoop(set_as_default=True )

2571

DBusGMainLoop(set_as_default=True)

2149

2572

main_loop = gobject.MainLoop()

2150

2573

bus = dbus.SystemBus()

2151

2574

# End of Avahi example code

2152

2575

if use_dbus:

2153

2576

try:

2154

2577

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")

2578

bus,

2579

do_not_queue=True)

2580

old_bus_name = dbus.service.BusName(

2581

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

2582

do_not_queue=True)

2583

except dbus.exceptions.DBusException as e:

2584

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

2161

2585

use_dbus = False

2162

2586

server_settings["use_dbus"] = False

2163

2587

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"])))

2588

if zeroconf:

2589

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2590

service = AvahiServiceToSyslog(

2591

name = server_settings["servicename"],

2592

servicetype = "_mandos._tcp",

2593

protocol = protocol,

2594

bus = bus)

2595

if server_settings["interface"]:

2596

service.interface = if_nametoindex(

2597

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

2172

2598

2173

2599

global multiprocessing_manager

2174

2600

multiprocessing_manager = multiprocessing.Manager()

2175

2601

2176

2602

client_class = Client

2177

2603

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

2604

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

2605

2606

client_settings = Client.config_parser(client_config)

2204

2607

old_client_settings = {}

2205

clients_data = []

2608

clients_data = {}

2609

2610

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

2611

global wnull

2612

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

2613

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

2614

# mode

2615

if debug or not foreground:

2616

wnull.close()

2206

2617

2207

2618

# Get client data and settings from last running state.

2208

2619

if server_settings["restore"]:

2209

2620

try:

2210

2621

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

2211

clients_data, old_client_settings = (pickle.load

2212

(stored_state))

2622

clients_data, old_client_settings = pickle.load(

2623

stored_state)

2213

2624

os.remove(stored_state_path)

2214

2625

except IOError as e:

2215

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

2216

.format(e))

2217

if e.errno != errno.ENOENT:

2626

if e.errno == errno.ENOENT:

2627

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

2628

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

2629

else:

2630

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

2631

exc_info=e)

2218

2632

raise

2633

except EOFError as e:

2634

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

2635

"EOFError:",

2636

exc_info=e)

2219

2637

2220

with Crypto() as crypt:

2221

for client in clients_data:

2222

client_name = client["name"]

2638

with PGPEngine() as pgp:

2639

for client_name, client in clients_data.items():

2640

# Skip removed clients

2641

if client_name not in client_settings:

2642

continue

2223

2643

2224

2644

# Decide which value to use after restoring saved state.

2225

2645

# We have three different values: Old config file,

2231

2651

# For each value in new config, check if it

2232

2652

# differs from the old config value (Except for

2233

2653

# the "secret" attribute)

2234

if (name != "secret" and

2235

value != old_client_settings[client_name]

2236

[name]):

2237

setattr(client, name, value)

2654

if (name != "secret"

2655

and (value !=

2656

old_client_settings[client_name][name])):

2657

client[name] = value

2238

2658

except KeyError:

2239

2659

pass

2240

2660

2241

2661

# 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:

2662

# enabled if its last checker was successful. A Client

2663

# whose checker succeeded before we stored its state is

2664

# assumed to have successfully run all checkers during

2665

# downtime.

2666

if client["enabled"]:

2667

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

2668

if not client["last_checked_ok"]:

2669

logger.warning(

2670

"disabling client {} - Client never "

2671

"performed a successful checker".format(

2672

client_name))

2673

client["enabled"] = False

2674

elif client["last_checker_status"] != 0:

2675

logger.warning(

2676

"disabling client {} - Client last"

2677

" checker failed with error code"

2678

" {}".format(

2679

client_name,

2680

client["last_checker_status"]))

2250

2681

client["enabled"] = False

2251

2682

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

2683

client["expires"] = (

2684

datetime.datetime.utcnow()

2685

+ client["timeout"])

2686

logger.debug("Last checker succeeded,"

2687

" keeping {} enabled".format(

2688

client_name))

2284

2689

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:

2690

client["secret"] = pgp.decrypt(

2691

client["encrypted_secret"],

2692

client_settings[client_name]["secret"])

2693

except PGPError:

2291

2694

# 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]))

2695

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

2696

client_name))

2697

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

2698

["secret"])

2699

2700

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

2701

for client_name in (set(old_client_settings)

2702

- set(client_settings)):

2703

del clients_data[client_name]

2704

for client_name in (set(client_settings)

2705

- set(old_client_settings)):

2706

clients_data[client_name] = client_settings[client_name]

2707

2708

# Create all client objects

2709

for client_name, client in clients_data.items():

2710

tcp_server.clients[client_name] = client_class(

2711

name = client_name,

2712

settings = client,

2713

server_settings = server_settings)

2304

2714

2305

2715

if not tcp_server.clients:

2306

2716

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

2717

2718

if not foreground:

2719

if pidfile is not None:

2720

pid = os.getpid()

2721

try:

2722

with pidfile:

2723

print(pid, file=pidfile)

2724

except IOError:

2725

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

2726

pidfilename, pid)

2727

del pidfile

2320

2728

del pidfilename

2321

2322

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

2323

2729

2324

2730

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

2325

2731

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

2326

2732

2327

2733

if use_dbus:

2328

class MandosDBusService(dbus.service.Object):

2734

2735

@alternate_dbus_interfaces(

2736

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

2737

class MandosDBusService(DBusObjectWithProperties):

2329

2738

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

2739

2330

2740

def __init__(self):

2331

2741

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

2742

2332

2743

_interface = "se.recompile.Mandos"

2333

2744

2745

@dbus_interface_annotations(_interface)

2746

def _foo(self):

2747

return {

2748

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

2749

"false" }

2750

2334

2751

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

2335

2752

def ClientAdded(self, objpath):

2336

2753

"D-Bus signal"

2349

2766

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

2350

2767

def GetAllClients(self):

2351

2768

"D-Bus method"

2352

return dbus.Array(c.dbus_object_path

2353

for c in

2769

return dbus.Array(c.dbus_object_path for c in

2354

2770

tcp_server.clients.itervalues())

2355

2771

2356

2772

@dbus.service.method(_interface,

2358

2774

def GetAllClientsWithProperties(self):

2359

2775

"D-Bus method"

2360

2776

return dbus.Dictionary(

2361

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

2362

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

2777

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

2778

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

2363

2779

signature="oa{sv}")

2364

2780

2365

2781

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

2378

2794

2379

2795

del _interface

2380

2796

2381

class MandosDBusServiceTransitional(MandosDBusService):

2382

__metaclass__ = AlternateDBusNamesMetaclass

2383

mandos_dbus_service = MandosDBusServiceTransitional()

2797

mandos_dbus_service = MandosDBusService()

2384

2798

2385

2799

def cleanup():

2386

2800

"Cleanup function; run on exit"

2387

service.cleanup()

2801

if zeroconf:

2802

service.cleanup()

2388

2803

2389

2804

multiprocessing.active_children()

2805

wnull.close()

2390

2806

if not (tcp_server.clients or client_settings):

2391

2807

return

2392

2808

2393

2809

# Store client before exiting. Secrets are encrypted with key

2394

2810

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

2395

2811

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

2396

clients = []

2397

with Crypto() as crypt:

2812

clients = {}

2813

with PGPEngine() as pgp:

2398

2814

for client in tcp_server.clients.itervalues():

2399

2815

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

2400

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

2401

key)

2816

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

2817

key)

2402

2818

client_dict = {}

2403

2819

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)):

2820

# A list of attributes that can not be pickled

2821

# + secret.

2822

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

2823

"checker", "server_settings" }

2824

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

2825

.Object):

2409

2826

exclude.add(name)

2410

2827

2411

2828

client_dict["encrypted_secret"] = (client

2414

2831

if attr not in exclude:

2415

2832

client_dict[attr] = getattr(client, attr)

2416

2833

2417

clients.append(client_dict)

2834

clients[client.name] = client_dict

2418

2835

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

2419

2836

2420

2837

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:

2838

with tempfile.NamedTemporaryFile(

2839

mode='wb',

2840

suffix=".pickle",

2841

prefix='clients-',

2842

dir=os.path.dirname(stored_state_path),

2843

delete=False) as stored_state:

2424

2844

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

2845

tempname = stored_state.name

2846

os.rename(tempname, stored_state_path)

2425

2847

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):

2848

if not debug:

2849

try:

2850

os.remove(tempname)

2851

except NameError:

2852

pass

2853

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

2854

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

2855

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

2856

else:

2857

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

2858

exc_info=e)

2429

2859

raise

2430

2860

2431

2861

# Delete all clients, and settings from config

2437

2867

client.disable(quiet=True)

2438

2868

if use_dbus:

2439

2869

# Emit D-Bus signal

2440

mandos_dbus_service.ClientRemoved(client

2441

.dbus_object_path,

2442

client.name)

2870

mandos_dbus_service.ClientRemoved(

2871

client.dbus_object_path, client.name)

2443

2872

client_settings.clear()

2444

2873

2445

2874

atexit.register(cleanup)

2456

2885

tcp_server.server_activate()

2457

2886

2458

2887

# Find out what port we got

2459

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

2888

if zeroconf:

2889

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

2460

2890

if use_ipv6:

2461

2891

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

2462

" flowinfo %d, scope_id %d"

2463

% tcp_server.socket.getsockname())

2892

" flowinfo %d, scope_id %d",

2893

*tcp_server.socket.getsockname())

2464

2894

else: # IPv4

2465

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

2466

% tcp_server.socket.getsockname())

2895

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

2896

*tcp_server.socket.getsockname())

2467

2897

2468

2898

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

2469

2899

2470

2900

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

2901

if zeroconf:

2902

# From the Avahi example code

2903

try:

2904

service.activate()

2905

except dbus.exceptions.DBusException as error:

2906

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

2907

cleanup()

2908

sys.exit(1)

2909

# End of Avahi example code

2479

2910

2480

2911

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

2481

2912

lambda *args, **kwargs:

2485

2916

logger.debug("Starting main loop")

2486

2917

main_loop.run()

2487

2918

except AvahiError as error:

2488

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

2919

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

2489

2920

cleanup()

2490

2921

sys.exit(1)

2491

2922

except KeyboardInterrupt: