/mandos/trunk : revision 518.2.3

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#!/usr/bin/python2.7

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#!/usr/bin/python

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

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#

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

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

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#

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# Everything else is

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#

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

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

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import SocketServer as socketserver

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import socket

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import argparse

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import 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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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 ConfigParser as configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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try:

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import gobject

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except ImportError:

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from gi.repository import GObject as gobject

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import gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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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 = "1.6.9"

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version = "1.4.1"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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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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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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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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return interface_index

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

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def initlogger(level=logging.WARNING):

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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class CryptoError(Exception):

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pass

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class PGPEngine(object):

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

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen(['gpg', '--symmetric',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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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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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen(['gpg', '--decrypt',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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

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**kwargs)

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

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def __unicode__(self):

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return unicode(repr(self.value))

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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type: string; Example: '_mandos._tcp'.

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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def __init__(self, interface = avahi.IF_UNSPEC, name = None,

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servicetype = None, port = None, TXT = None,

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domain = "", host = "", max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self, remove=True):

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def rename(self):

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

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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 = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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self.name)

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if remove:

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self.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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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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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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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"""

358

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

364

318

self.rename()

365

319

elif state == avahi.ENTRY_GROUP_FAILURE:

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

367

str(error))

368

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

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unicode(error))

322

raise AvahiGroupError("State changed: %s"

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% unicode(error))

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def cleanup(self):

371

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

372

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if self.group is not None:

377

331

pass

378

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self.group = None

379

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self.remove()

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381

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

382

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

383

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

384

bad_states = {

385

avahi.SERVER_INVALID: "Zeroconf server invalid",

386

avahi.SERVER_REGISTERING: None,

387

avahi.SERVER_COLLISION: "Zeroconf server name collision",

388

avahi.SERVER_FAILURE: "Zeroconf server failure",

389

}

337

bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

340

avahi.SERVER_COLLISION:

341

"Zeroconf server name collision",

342

avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

390

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if state in bad_states:

391

345

if bad_states[state] is not None:

392

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if error is None:

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

396

350

self.cleanup()

397

351

elif state == avahi.SERVER_RUNNING:

398

try:

399

self.add()

400

except dbus.exceptions.DBusException as error:

401

if (error.get_dbus_name()

402

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

403

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)

352

self.add()

410

353

else:

411

354

if error is None:

412

355

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

413

356

else:

414

357

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

415

416

358

def activate(self):

417

359

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

418

360

if self.server is None:

422

364

follow_name_owner_changes=True),

423

365

avahi.DBUS_INTERFACE_SERVER)

424

366

self.server.connect_to_signal("StateChanged",

425

self.server_state_changed)

367

self.server_state_changed)

426

368

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

427

369

428

429

370

class AvahiServiceToSyslog(AvahiService):

430

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

371

def rename(self):

431

372

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

432

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

433

syslogger.setFormatter(logging.Formatter(

434

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

435

.format(self.name)))

373

ret = AvahiService.rename(self)

374

syslogger.setFormatter(logging.Formatter

375

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

376

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

377

% self.name))

436

378

return ret

437

379

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

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

448

386

class Client(object):

449

387

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

450

388

451

389

Attributes:

452

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

390

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

453

391

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

454

392

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

455

393

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

473

411

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

474

412

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

475

413

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

414

476

415

last_checker_status: integer between 0 and 255 reflecting exit

477

416

status of last checker. -1 reflects crashed

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

417

checker, or None.

481

418

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

482

419

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

483

420

D-Bus identifiers

484

421

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

485

422

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

486

423

until this client is disabled

487

extended_timeout: extra long timeout when secret has been sent

424

extended_timeout: extra long timeout when password has been sent

488

425

runtime_expansions: Allowed attributes for runtime expansion.

489

426

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

490

427

disabled, or None

491

server_settings: The server_settings dict from main()

492

428

"""

493

429

494

430

runtime_expansions = ("approval_delay", "approval_duration",

495

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

496

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

497

"last_approval_request", "last_checked_ok",

431

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

432

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

498

433

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

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):

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."""

562

454

self.name = name

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

455

if config is None:

456

config = {}

580

457

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(" ", ""))

581

463

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

582

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

583

datetime.datetime.utcnow())

584

585

# attributes specific for this server instance

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"])

586

488

self.checker = None

587

489

self.checker_initiator_tag = None

588

490

self.disable_initiator_tag = None

491

if self.enabled:

492

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

493

else:

494

self.expires = None

589

495

self.checker_callback_tag = None

496

self.checker_command = config["checker"]

590

497

self.current_checker_command = None

591

self.approved = None

498

self._approved = None

499

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

500

True)

592

501

self.approvals_pending = 0

593

self.changedstate = multiprocessing_manager.Condition(

594

multiprocessing_manager.Lock())

595

self.client_structure = [attr

596

for attr in self.__dict__.iterkeys()

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()

597

511

if not attr.startswith("_")]

598

512

self.client_structure.append("client_structure")

599

513

600

for name, t in inspect.getmembers(

601

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

514

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

515

lambda obj:

516

isinstance(obj,

517

property)):

602

518

if not name.startswith("_"):

603

519

self.client_structure.append(name)

604

520

612

528

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

613

529

# Already enabled

614

530

return

531

self.send_changedstate()

615

532

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

616

533

self.enabled = True

617

534

self.last_enabled = datetime.datetime.utcnow()

618

535

self.init_checker()

619

self.send_changedstate()

620

536

621

537

def disable(self, quiet=True):

622

538

"""Disable this client."""

623

539

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

624

540

return False

625

541

if not quiet:

542

self.send_changedstate()

543

if not quiet:

626

544

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

627

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

545

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

628

546

gobject.source_remove(self.disable_initiator_tag)

629

547

self.disable_initiator_tag = None

630

548

self.expires = None

631

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

549

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

632

550

gobject.source_remove(self.checker_initiator_tag)

633

551

self.checker_initiator_tag = None

634

552

self.stop_checker()

635

553

self.enabled = False

636

if not quiet:

637

self.send_changedstate()

638

554

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

639

555

return False

640

556

644

560

def init_checker(self):

645

561

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

646

562

# and every interval from then on.

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)

563

self.checker_initiator_tag = (gobject.timeout_add

564

(self.interval_milliseconds(),

565

self.start_checker))

652

566

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

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)

567

self.disable_initiator_tag = (gobject.timeout_add

568

(self.timeout_milliseconds(),

569

self.disable))

657

570

# Also start a new checker *right now*.

658

571

self.start_checker()

659

572

660

def checker_callback(self, source, condition, connection,

661

command):

573

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

662

574

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

663

575

self.checker_callback_tag = None

664

576

self.checker = None

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

577

if os.WIFEXITED(condition):

578

self.last_checker_status = os.WEXITSTATUS(condition)

672

579

if self.last_checker_status == 0:

673

580

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

674

581

vars(self))

675

582

self.checked_ok()

676

583

else:

677

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

584

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

585

vars(self))

678

586

else:

679

587

self.last_checker_status = -1

680

self.last_checker_signal = -returncode

681

588

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

682

589

vars(self))

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."""

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

"""

694

597

if timeout is None:

695

598

timeout = self.timeout

599

self.last_checked_ok = datetime.datetime.utcnow()

696

600

if self.disable_initiator_tag is not None:

697

601

gobject.source_remove(self.disable_initiator_tag)

698

self.disable_initiator_tag = None

699

602

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

700

self.disable_initiator_tag = gobject.timeout_add(

701

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

603

self.disable_initiator_tag = (gobject.timeout_add

604

(_timedelta_to_milliseconds

605

(timeout), self.disable))

702

606

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

703

607

704

608

def need_approval(self):

710

614

If a checker already exists, leave it running and do

711

615

nothing."""

712

616

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

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

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

717

621

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

718

622

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

719

623

# should be.

720

624

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

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)

725

638

# Start a new checker if needed

726

639

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 }

731

640

try:

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

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

738

659

self.current_checker_command = command

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)

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)

764

683

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

765

684

return True

766

685

772

691

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

773

692

return

774

693

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

775

self.checker.terminate()

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

776

702

self.checker = None

777

703

778

704

779

def dbus_service_property(dbus_interface,

780

signature="v",

781

access="readwrite",

782

byte_arrays=False):

705

def dbus_service_property(dbus_interface, signature="v",

706

access="readwrite", byte_arrays=False):

783

707

"""Decorators for marking methods of a DBusObjectWithProperties to

784

708

become properties on the D-Bus.

785

709

794

718

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

795

719

if byte_arrays and signature != "ay":

796

720

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

797

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

798

721

" signature %r" % signature)

799

722

def decorator(func):

800

723

func._dbus_is_property = True

801

724

func._dbus_interface = dbus_interface

806

729

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

807

730

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

808

731

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

851

732

return decorator

852

733

853

734

854

735

class DBusPropertyException(dbus.exceptions.DBusException):

855

736

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

856

737

"""

857

pass

738

def __unicode__(self):

739

return unicode(str(self))

858

740

859

741

860

742

class DBusPropertyAccessException(DBusPropertyException):

878

760

"""

879

761

880

762

@staticmethod

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)

763

def _is_dbus_property(obj):

764

return getattr(obj, "_dbus_is_property", False)

889

765

890

def _get_all_dbus_things(self, thing):

766

def _get_all_dbus_properties(self):

891

767

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

892

768

"""

893

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

894

athing.__get__(self))

769

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

895

770

for cls in self.__class__.__mro__

896

for name, athing in

897

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

771

for name, prop in

772

inspect.getmembers(cls, self._is_dbus_property))

898

773

899

774

def _get_dbus_property(self, interface_name, property_name):

900

775

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

901

776

property with the specified name and interface.

902

777

"""

903

for cls in self.__class__.__mro__:

904

for name, value in inspect.getmembers(

905

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

778

for cls in self.__class__.__mro__:

779

for name, value in (inspect.getmembers

780

(cls, self._is_dbus_property)):

906

781

if (value._dbus_name == property_name

907

782

and value._dbus_interface == interface_name):

908

783

return value.__get__(self)

909

784

910

785

# No such property

911

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

912

self.dbus_object_path, interface_name, property_name))

786

raise DBusPropertyNotFound(self.dbus_object_path + ":"

787

+ interface_name + "."

788

+ property_name)

913

789

914

@dbus.service.method(dbus.PROPERTIES_IFACE,

915

in_signature="ss",

790

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

916

791

out_signature="v")

917

792

def Get(self, interface_name, property_name):

918

793

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

936

811

# The byte_arrays option is not supported yet on

937

812

# signatures other than "ay".

938

813

if prop._dbus_signature != "ay":

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))

814

raise ValueError

815

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

816

for byte in value))

944

817

prop(value)

945

818

946

@dbus.service.method(dbus.PROPERTIES_IFACE,

947

in_signature="s",

819

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

948

820

out_signature="a{sv}")

949

821

def GetAll(self, interface_name):

950

822

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

953

825

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

954

826

"""

955

827

properties = {}

956

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

828

for name, prop in self._get_all_dbus_properties():

957

829

if (interface_name

958

830

and interface_name != prop._dbus_interface):

959

831

# Interface non-empty but did not match

965

837

if not hasattr(value, "variant_level"):

966

838

properties[name] = value

967

839

continue

968

properties[name] = type(value)(

969

value, variant_level = value.variant_level + 1)

840

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

841

value.variant_level+1)

970

842

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

971

843

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

980

844

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

981

845

out_signature="s",

982

846

path_keyword='object_path',

983

847

connection_keyword='connection')

984

848

def Introspect(self, object_path, connection):

985

"""Overloading of standard D-Bus method.

986

987

Inserts property tags and interface annotation tags.

849

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

988

850

"""

989

851

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

990

852

connection)

991

853

try:

992

854

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

993

994

855

def make_tag(document, name, prop):

995

856

e = document.createElement("property")

996

857

e.setAttribute("name", name)

997

858

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

998

859

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

999

860

return e

1000

1001

861

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

1002

# Add property tags

1003

862

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

1004

863

for name, prop

1005

in self._get_all_dbus_things("property")

864

in self._get_all_dbus_properties()

1006

865

if prop._dbus_interface

1007

866

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

1008

867

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)

1038

868

# Add the names to the return values for the

1039

869

# "org.freedesktop.DBus.Properties" methods

1040

870

if (if_tag.getAttribute("name")

1055

885

except (AttributeError, xml.dom.DOMException,

1056

886

xml.parsers.expat.ExpatError) as error:

1057

887

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

1058

exc_info=error)

888

error)

1059

889

return xmlstring

1060

890

1061

891

1062

def datetime_to_dbus(dt, variant_level=0):

892

def datetime_to_dbus (dt, variant_level=0):

1063

893

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

1064

894

if dt is None:

1065

895

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

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).

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.

1091

904

"""

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):

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):

1100

912

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

1101

913

# with the wrong interface name

1102

914

if (not hasattr(attribute, "_dbus_interface")

1103

or not attribute._dbus_interface.startswith(

1104

orig_interface_name)):

915

or not attribute._dbus_interface

916

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

1105

917

continue

1106

918

# Create an alternate D-Bus interface name based on

1107

919

# the current name

1108

alt_interface = attribute._dbus_interface.replace(

1109

orig_interface_name, alt_interface_name)

1110

interface_names.add(alt_interface)

920

alt_interface = (attribute._dbus_interface

921

.replace("se.recompile.Mandos",

922

"se.bsnet.fukt.Mandos"))

1111

923

# Is this a D-Bus signal?

1112

924

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

1113

if sys.version_info.major == 2:

1114

# Extract the original non-method undecorated

1115

# function by black magic

1116

nonmethod_func = (dict(

925

# Extract the original non-method function by

926

# black magic

927

nonmethod_func = (dict(

1117

928

zip(attribute.func_code.co_freevars,

1118

attribute.__closure__))

1119

["func"].cell_contents)

1120

else:

1121

nonmethod_func = attribute

929

attribute.__closure__))["func"]

930

.cell_contents)

1122

931

# Create a new, but exactly alike, function

1123

932

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

1124

933

# with the alternate D-Bus interface name

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

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)))

1148

943

# Define a creator of a function to call both the

1149

# original and alternate functions, so both the

1150

# original and alternate signals gets sent when

1151

# the function is called

944

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

945

# signals gets sent when the function is called

1152

946

def fixscope(func1, func2):

1153

947

"""This function is a scope container to pass

1154

948

func1 and func2 to the "call_both" function

1155

949

outside of its arguments"""

1156

1157

950

def call_both(*args, **kwargs):

1158

951

"""This function will emit two D-Bus

1159

952

signals by calling func1 and func2"""

1160

953

func1(*args, **kwargs)

1161

954

func2(*args, **kwargs)

1162

1163

955

return call_both

1164

956

# Create the "call_both" function and add it to

1165

957

# the class

1166

attr[attrname] = fixscope(attribute, new_function)

958

attr[attrname] = fixscope(attribute,

959

new_function)

1167

960

# Is this a D-Bus method?

1168

961

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

1169

962

# Create a new, but exactly alike, function

1170

963

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

1171

964

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

1172

965

# to the class.

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

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)))

1189

976

# Is this a D-Bus property?

1190

977

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

1191

978

# Create a new, but exactly alike, function

1192

979

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

1193

980

# property with the alternate D-Bus interface

1194

981

# name. Add it to the class.

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"})

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

1252

998

class ClientDBus(Client, DBusObjectWithProperties):

1253

999

"""A Client class using D-Bus

1254

1000

1258

1004

"""

1259

1005

1260

1006

runtime_expansions = (Client.runtime_expansions

1261

+ ("dbus_object_path", ))

1262

1263

_interface = "se.recompile.Mandos.Client"

1007

+ ("dbus_object_path",))

1264

1008

1265

1009

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

1266

1010

1267

1011

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

1268

1012

self.bus = bus

1269

1013

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

1014

1015

self._approvals_pending = 0

1270

1016

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

1271

1017

# the D-Bus

1272

client_object_name = str(self.name).translate(

1018

client_object_name = unicode(self.name).translate(

1273

1019

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

1274

1020

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

1275

self.dbus_object_path = dbus.ObjectPath(

1276

"/clients/" + client_object_name)

1021

self.dbus_object_path = (dbus.ObjectPath

1022

("/clients/" + client_object_name))

1277

1023

DBusObjectWithProperties.__init__(self, self.bus,

1278

1024

self.dbus_object_path)

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):

1025

1026

def notifychangeproperty(transform_func,

1027

dbus_name, type_func=lambda x: x,

1028

variant_level=1):

1285

1029

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

1286

1030

its changes to DBus.

1287

1031

1292

1036

to the D-Bus. Default: no transform

1293

1037

variant_level: D-Bus variant level. Default: 1

1294

1038

"""

1295

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

1296

1039

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

1297

1040

def setter(self, value):

1298

1041

if hasattr(self, "dbus_object_path"):

1299

1042

if (not hasattr(self, attrname) or

1300

1043

type_func(getattr(self, attrname, None))

1301

1044

!= type_func(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())

1045

dbus_value = transform_func(type_func(value),

1046

variant_level

1047

=variant_level)

1048

self.PropertyChanged(dbus.String(dbus_name),

1049

dbus_value)

1317

1050

setattr(self, attrname, value)

1318

1051

1319

1052

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

1320

1053

1054

1321

1055

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1322

1056

approvals_pending = notifychangeproperty(dbus.Boolean,

1323

1057

"ApprovalPending",

1325

1059

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

1326

1060

last_enabled = notifychangeproperty(datetime_to_dbus,

1327

1061

"LastEnabled")

1328

checker = notifychangeproperty(

1329

dbus.Boolean, "CheckerRunning",

1330

type_func = lambda checker: checker is not None)

1062

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

1063

type_func = lambda checker:

1064

checker is not None)

1331

1065

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1332

1066

"LastCheckedOK")

1333

last_checker_status = notifychangeproperty(dbus.Int16,

1334

"LastCheckerStatus")

1335

1067

last_approval_request = notifychangeproperty(

1336

1068

datetime_to_dbus, "LastApprovalRequest")

1337

1069

approved_by_default = notifychangeproperty(dbus.Boolean,

1338

1070

"ApprovedByDefault")

1339

approval_delay = notifychangeproperty(

1340

dbus.UInt64, "ApprovalDelay",

1341

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

1071

approval_delay = notifychangeproperty(dbus.UInt16,

1072

"ApprovalDelay",

1073

type_func =

1074

_timedelta_to_milliseconds)

1342

1075

approval_duration = notifychangeproperty(

1343

dbus.UInt64, "ApprovalDuration",

1344

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

1076

dbus.UInt16, "ApprovalDuration",

1077

type_func = _timedelta_to_milliseconds)

1345

1078

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

1346

timeout = notifychangeproperty(

1347

dbus.UInt64, "Timeout",

1348

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

1079

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

1080

type_func =

1081

_timedelta_to_milliseconds)

1349

1082

extended_timeout = notifychangeproperty(

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)

1083

dbus.UInt16, "ExtendedTimeout",

1084

type_func = _timedelta_to_milliseconds)

1085

interval = notifychangeproperty(dbus.UInt16,

1086

"Interval",

1087

type_func =

1088

_timedelta_to_milliseconds)

1355

1089

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

1356

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

1357

invalidate_only=True)

1358

1090

1359

1091

del notifychangeproperty

1360

1092

1367

1099

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

1368

1100

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

1369

1101

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:

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)

1377

1108

# Emit D-Bus signal

1378

1109

self.CheckerCompleted(dbus.Int16(exitstatus),

1379

dbus.Int64(0),

1110

dbus.Int64(condition),

1380

1111

dbus.String(command))

1381

1112

else:

1382

1113

# Emit D-Bus signal

1383

1114

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

1384

dbus.Int64(

1385

self.last_checker_signal),

1115

dbus.Int64(condition),

1386

1116

dbus.String(command))

1387

return ret

1117

1118

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

1119

*args, **kwargs)

1388

1120

1389

1121

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

1390

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

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

1391

1127

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

1392

1128

# Only if new checker process was started

1393

1129

if (self.checker is not None

1397

1133

return r

1398

1134

1399

1135

def _reset_approved(self):

1400

self.approved = None

1136

self._approved = None

1401

1137

return False

1402

1138

1403

1139

def approve(self, value=True):

1404

self.approved = value

1405

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

1406

* 1000), self._reset_approved)

1407

1140

self.send_changedstate()

1141

self._approved = value

1142

gobject.timeout_add(_timedelta_to_milliseconds

1143

(self.approval_duration),

1144

self._reset_approved)

1145

1408

1146

1409

1147

## D-Bus methods, signals & properties

1410

1411

## Interfaces

1148

_interface = "se.recompile.Mandos.Client"

1412

1149

1413

1150

## Signals

1414

1151

1425

1162

pass

1426

1163

1427

1164

# PropertyChanged - signal

1428

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

1429

1165

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

1430

1166

def PropertyChanged(self, property, value):

1431

1167

"D-Bus signal"

1452

1188

"D-Bus signal"

1453

1189

return self.need_approval()

1454

1190

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

1455

1199

## Methods

1456

1200

1457

1201

# Approve - method

1495

1239

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

1496

1240

1497

1241

# ApprovedByDefault - property

1498

@dbus_service_property(_interface,

1499

signature="b",

1242

@dbus_service_property(_interface, signature="b",

1500

1243

access="readwrite")

1501

1244

def ApprovedByDefault_dbus_property(self, value=None):

1502

1245

if value is None: # get

1504

1247

self.approved_by_default = bool(value)

1505

1248

1506

1249

# ApprovalDelay - property

1507

@dbus_service_property(_interface,

1508

signature="t",

1250

@dbus_service_property(_interface, signature="t",

1509

1251

access="readwrite")

1510

1252

def ApprovalDelay_dbus_property(self, value=None):

1511

1253

if value is None: # get

1512

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

1513

* 1000)

1254

return dbus.UInt64(self.approval_delay_milliseconds())

1514

1255

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

1515

1256

1516

1257

# ApprovalDuration - property

1517

@dbus_service_property(_interface,

1518

signature="t",

1258

@dbus_service_property(_interface, signature="t",

1519

1259

access="readwrite")

1520

1260

def ApprovalDuration_dbus_property(self, value=None):

1521

1261

if value is None: # get

1522

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

1523

* 1000)

1262

return dbus.UInt64(_timedelta_to_milliseconds(

1263

self.approval_duration))

1524

1264

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

1525

1265

1526

1266

# Name - property

1534

1274

return dbus.String(self.fingerprint)

1535

1275

1536

1276

# Host - property

1537

@dbus_service_property(_interface,

1538

signature="s",

1277

@dbus_service_property(_interface, signature="s",

1539

1278

access="readwrite")

1540

1279

def Host_dbus_property(self, value=None):

1541

1280

if value is None: # get

1542

1281

return dbus.String(self.host)

1543

self.host = str(value)

1282

self.host = value

1544

1283

1545

1284

# Created - property

1546

1285

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

1553

1292

return datetime_to_dbus(self.last_enabled)

1554

1293

1555

1294

# Enabled - property

1556

@dbus_service_property(_interface,

1557

signature="b",

1295

@dbus_service_property(_interface, signature="b",

1558

1296

access="readwrite")

1559

1297

def Enabled_dbus_property(self, value=None):

1560

1298

if value is None: # get

1565

1303

self.disable()

1566

1304

1567

1305

# LastCheckedOK - property

1568

@dbus_service_property(_interface,

1569

signature="s",

1306

@dbus_service_property(_interface, signature="s",

1570

1307

access="readwrite")

1571

1308

def LastCheckedOK_dbus_property(self, value=None):

1572

1309

if value is not None:

1574

1311

return

1575

1312

return datetime_to_dbus(self.last_checked_ok)

1576

1313

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

1582

1314

# Expires - property

1583

1315

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

1584

1316

def Expires_dbus_property(self):

1590

1322

return datetime_to_dbus(self.last_approval_request)

1591

1323

1592

1324

# Timeout - property

1593

@dbus_service_property(_interface,

1594

signature="t",

1325

@dbus_service_property(_interface, signature="t",

1595

1326

access="readwrite")

1596

1327

def Timeout_dbus_property(self, value=None):

1597

1328

if value is None: # get

1598

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

1599

old_timeout = self.timeout

1329

return dbus.UInt64(self.timeout_milliseconds())

1600

1330

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

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)

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))

1616

1351

1617

1352

# ExtendedTimeout - property

1618

@dbus_service_property(_interface,

1619

signature="t",

1353

@dbus_service_property(_interface, signature="t",

1620

1354

access="readwrite")

1621

1355

def ExtendedTimeout_dbus_property(self, value=None):

1622

1356

if value is None: # get

1623

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

1624

* 1000)

1357

return dbus.UInt64(self.extended_timeout_milliseconds())

1625

1358

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

1626

1359

1627

1360

# Interval - property

1628

@dbus_service_property(_interface,

1629

signature="t",

1361

@dbus_service_property(_interface, signature="t",

1630

1362

access="readwrite")

1631

1363

def Interval_dbus_property(self, value=None):

1632

1364

if value is None: # get

1633

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

1365

return dbus.UInt64(self.interval_milliseconds())

1634

1366

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

1635

1367

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

1636

1368

return

1637

1369

if self.enabled:

1638

1370

# Reschedule checker run

1639

1371

gobject.source_remove(self.checker_initiator_tag)

1640

self.checker_initiator_tag = gobject.timeout_add(

1641

value, self.start_checker)

1642

self.start_checker() # Start one now, too

1372

self.checker_initiator_tag = (gobject.timeout_add

1373

(value, self.start_checker))

1374

self.start_checker() # Start one now, too

1643

1375

1644

1376

# Checker - property

1645

@dbus_service_property(_interface,

1646

signature="s",

1377

@dbus_service_property(_interface, signature="s",

1647

1378

access="readwrite")

1648

1379

def Checker_dbus_property(self, value=None):

1649

1380

if value is None: # get

1650

1381

return dbus.String(self.checker_command)

1651

self.checker_command = str(value)

1382

self.checker_command = value

1652

1383

1653

1384

# CheckerRunning - property

1654

@dbus_service_property(_interface,

1655

signature="b",

1385

@dbus_service_property(_interface, signature="b",

1656

1386

access="readwrite")

1657

1387

def CheckerRunning_dbus_property(self, value=None):

1658

1388

if value is None: # get

1668

1398

return self.dbus_object_path # is already a dbus.ObjectPath

1669

1399

1670

1400

# Secret = property

1671

@dbus_service_property(_interface,

1672

signature="ay",

1673

access="write",

1674

byte_arrays=True)

1401

@dbus_service_property(_interface, signature="ay",

1402

access="write", byte_arrays=True)

1675

1403

def Secret_dbus_property(self, value):

1676

self.secret = bytes(value)

1404

self.secret = str(value)

1677

1405

1678

1406

del _interface

1679

1407

1683

1411

self._pipe = child_pipe

1684

1412

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

1685

1413

if not self._pipe.recv():

1686

raise KeyError(fpr)

1414

raise KeyError()

1687

1415

1688

1416

def __getattribute__(self, name):

1689

if name == '_pipe':

1417

if(name == '_pipe'):

1690

1418

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

1691

1419

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

1692

1420

data = self._pipe.recv()

1693

1421

if data[0] == 'data':

1694

1422

return data[1]

1695

1423

if data[0] == 'function':

1696

1697

1424

def func(*args, **kwargs):

1698

1425

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

1699

1426

return self._pipe.recv()[1]

1700

1701

1427

return func

1702

1428

1703

1429

def __setattr__(self, name, value):

1704

if name == '_pipe':

1430

if(name == '_pipe'):

1705

1431

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

1706

1432

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

1707

1433

1708

1434

1435

class ClientDBusTransitional(ClientDBus):

1436

__metaclass__ = AlternateDBusNamesMetaclass

1437

1438

1709

1439

class ClientHandler(socketserver.BaseRequestHandler, object):

1710

1440

"""A class to handle client connections.

1711

1441

1715

1445

def handle(self):

1716

1446

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

1717

1447

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

1718

str(self.client_address))

1448

unicode(self.client_address))

1719

1449

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

1720

1450

self.server.child_pipe.fileno())

1721

1451

1722

session = gnutls.connection.ClientSession(

1723

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

1452

session = (gnutls.connection

1453

.ClientSession(self.request,

1454

gnutls.connection

1455

.X509Credentials()))

1724

1456

1725

1457

# Note: gnutls.connection.X509Credentials is really a

1726

1458

# generic GnuTLS certificate credentials object so long as

1735

1467

priority = self.server.gnutls_priority

1736

1468

if priority is None:

1737

1469

priority = "NORMAL"

1738

gnutls.library.functions.gnutls_priority_set_direct(

1739

session._c_object, priority, None)

1470

(gnutls.library.functions

1471

.gnutls_priority_set_direct(session._c_object,

1472

priority, None))

1740

1473

1741

1474

# Start communication using the Mandos protocol

1742

1475

# Get protocol number

1744

1477

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

1745

1478

try:

1746

1479

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

1747

raise RuntimeError(line)

1480

raise RuntimeError

1748

1481

except (ValueError, IndexError, RuntimeError) as error:

1749

1482

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

1750

1483

return

1762

1495

approval_required = False

1763

1496

try:

1764

1497

try:

1765

fpr = self.fingerprint(

1766

self.peer_certificate(session))

1498

fpr = self.fingerprint(self.peer_certificate

1499

(session))

1767

1500

except (TypeError,

1768

1501

gnutls.errors.GNUTLSError) as error:

1769

1502

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

1770

1503

return

1771

1504

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

1505

if self.server.use_dbus:

1506

# Emit D-Bus signal

1507

client.NewRequest(str(self.client_address))

1772

1508

1773

1509

try:

1774

1510

client = ProxyClient(child_pipe, fpr,

1784

1520

while True:

1785

1521

if not client.enabled:

1786

1522

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

1787

client.name)

1523

client.name)

1788

1524

if self.server.use_dbus:

1789

1525

# Emit D-Bus signal

1790

1526

client.Rejected("Disabled")

1791

1527

return

1792

1528

1793

if client.approved or not client.approval_delay:

1529

if client._approved or not client.approval_delay:

1794

1530

#We are approved or approval is disabled

1795

1531

break

1796

elif client.approved is None:

1532

elif client._approved is None:

1797

1533

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

1798

1534

client.name)

1799

1535

if self.server.use_dbus:

1800

1536

# Emit D-Bus signal

1801

1537

client.NeedApproval(

1802

client.approval_delay.total_seconds()

1803

* 1000, client.approved_by_default)

1538

client.approval_delay_milliseconds(),

1539

client.approved_by_default)

1804

1540

else:

1805

1541

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

1806

1542

client.name)

1812

1548

#wait until timeout or approved

1813

1549

time = datetime.datetime.now()

1814

1550

client.changedstate.acquire()

1815

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

1551

(client.changedstate.wait

1552

(float(client._timedelta_to_milliseconds(delay)

1553

/ 1000)))

1816

1554

client.changedstate.release()

1817

1555

time2 = datetime.datetime.now()

1818

1556

if (time2 - time) >= delay:

1834

1572

try:

1835

1573

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

1836

1574

except gnutls.errors.GNUTLSError as error:

1837

logger.warning("gnutls send failed",

1838

exc_info=error)

1575

logger.warning("gnutls send failed")

1839

1576

return

1840

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

1841

len(client.secret) - (sent_size

1842

+ sent))

1577

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

1578

sent, len(client.secret)

1579

- (sent_size + sent))

1843

1580

sent_size += sent

1844

1581

1845

1582

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

1846

1583

# bump the timeout using extended_timeout

1847

client.bump_timeout(client.extended_timeout)

1584

client.checked_ok(client.extended_timeout)

1848

1585

if self.server.use_dbus:

1849

1586

# Emit D-Bus signal

1850

1587

client.GotSecret()

1855

1592

try:

1856

1593

session.bye()

1857

1594

except gnutls.errors.GNUTLSError as error:

1858

logger.warning("GnuTLS bye failed",

1859

exc_info=error)

1595

logger.warning("GnuTLS bye failed")

1860

1596

1861

1597

@staticmethod

1862

1598

def peer_certificate(session):

1863

1599

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

1864

1600

# If not an OpenPGP certificate...

1865

if (gnutls.library.functions.gnutls_certificate_type_get(

1866

session._c_object)

1601

if (gnutls.library.functions

1602

.gnutls_certificate_type_get(session._c_object)

1867

1603

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1868

1604

# ...do the normal thing

1869

1605

return session.peer_certificate

1883

1619

def fingerprint(openpgp):

1884

1620

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1885

1621

# New GnuTLS "datum" with the OpenPGP public key

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)))

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))))

1890

1627

# New empty GnuTLS certificate

1891

1628

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1892

gnutls.library.functions.gnutls_openpgp_crt_init(

1893

ctypes.byref(crt))

1629

(gnutls.library.functions

1630

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1894

1631

# Import the OpenPGP public key into the certificate

1895

gnutls.library.functions.gnutls_openpgp_crt_import(

1896

crt, ctypes.byref(datum),

1897

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1632

(gnutls.library.functions

1633

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

1634

gnutls.library.constants

1635

.GNUTLS_OPENPGP_FMT_RAW))

1898

1636

# Verify the self signature in the key

1899

1637

crtverify = ctypes.c_uint()

1900

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1901

crt, 0, ctypes.byref(crtverify))

1638

(gnutls.library.functions

1639

.gnutls_openpgp_crt_verify_self(crt, 0,

1640

ctypes.byref(crtverify)))

1902

1641

if crtverify.value != 0:

1903

1642

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1904

raise gnutls.errors.CertificateSecurityError(

1905

"Verify failed")

1643

raise (gnutls.errors.CertificateSecurityError

1644

("Verify failed"))

1906

1645

# New buffer for the fingerprint

1907

1646

buf = ctypes.create_string_buffer(20)

1908

1647

buf_len = ctypes.c_size_t()

1909

1648

# Get the fingerprint from the certificate into the buffer

1910

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1911

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

1649

(gnutls.library.functions

1650

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

1651

ctypes.byref(buf_len)))

1912

1652

# Deinit the certificate

1913

1653

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1914

1654

# Convert the buffer to a Python bytestring

1920

1660

1921

1661

class MultiprocessingMixIn(object):

1922

1662

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

1923

1924

1663

def sub_process_main(self, request, address):

1925

1664

try:

1926

1665

self.finish_request(request, address)

1927

except Exception:

1666

except:

1928

1667

self.handle_error(request, address)

1929

1668

self.close_request(request)

1930

1669

1931

1670

def process_request(self, request, address):

1932

1671

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

1933

1672

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

1934

args = (request, address))

1673

args = (request,

1674

address))

1935

1675

proc.start()

1936

1676

return proc

1937

1677

1938

1678

1939

1679

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1940

1680

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

1941

1942

1681

def process_request(self, request, client_address):

1943

1682

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

1944

1683

1953

1692

1954

1693

def add_pipe(self, parent_pipe, proc):

1955

1694

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

1956

raise NotImplementedError()

1695

raise NotImplementedError

1957

1696

1958

1697

1959

1698

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1965

1704

interface: None or a network interface name (string)

1966

1705

use_ipv6: Boolean; to use IPv6 or not

1967

1706

"""

1968

1969

1707

def __init__(self, server_address, RequestHandlerClass,

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

"""

1708

interface=None, use_ipv6=True):

1976

1709

self.interface = interface

1977

1710

if use_ipv6:

1978

1711

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.

2005

1712

socketserver.TCPServer.__init__(self, server_address,

2006

1713

RequestHandlerClass)

2007

2008

1714

def server_bind(self):

2009

1715

"""This overrides the normal server_bind() function

2010

1716

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

2016

1722

self.interface)

2017

1723

else:

2018

1724

try:

2019

self.socket.setsockopt(

2020

socket.SOL_SOCKET, SO_BINDTODEVICE,

2021

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

1725

self.socket.setsockopt(socket.SOL_SOCKET,

1726

SO_BINDTODEVICE,

1727

str(self.interface

1728

+ '\0'))

2022

1729

except socket.error as error:

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:

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:

2027

1735

logger.error("SO_BINDTODEVICE not available;"

2028

1736

" cannot bind to interface %s",

2029

1737

self.interface)

2030

elif error.errno == errno.ENODEV:

2031

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

2032

" cannot bind", self.interface)

2033

1738

else:

2034

1739

raise

2035

1740

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

2038

1743

if self.address_family == socket.AF_INET6:

2039

1744

any_address = "::" # in6addr_any

2040

1745

else:

2041

any_address = "0.0.0.0" # INADDR_ANY

1746

any_address = socket.INADDR_ANY

2042

1747

self.server_address = (any_address,

2043

1748

self.server_address[1])

2044

1749

elif not self.server_address[1]:

2045

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

1750

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

1751

0)

2046

1752

# if self.interface:

2047

1753

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

2048

1754

# 0, # port

2062

1768

2063

1769

Assumes a gobject.MainLoop event loop.

2064

1770

"""

2065

2066

1771

def __init__(self, server_address, RequestHandlerClass,

2067

interface=None,

2068

use_ipv6=True,

2069

clients=None,

2070

gnutls_priority=None,

2071

use_dbus=True,

2072

socketfd=None):

1772

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

1773

gnutls_priority=None, use_dbus=True):

2073

1774

self.enabled = False

2074

1775

self.clients = clients

2075

1776

if self.clients is None:

2079

1780

IPv6_TCPServer.__init__(self, server_address,

2080

1781

RequestHandlerClass,

2081

1782

interface = interface,

2082

use_ipv6 = use_ipv6,

2083

socketfd = socketfd)

2084

1783

use_ipv6 = use_ipv6)

2085

1784

def server_activate(self):

2086

1785

if self.enabled:

2087

1786

return socketserver.TCPServer.server_activate(self)

2091

1790

2092

1791

def add_pipe(self, parent_pipe, proc):

2093

1792

# Call "handle_ipc" for both data and EOF events

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))

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))

2100

1799

2101

def handle_ipc(self, source, condition,

2102

parent_pipe=None,

2103

proc = None,

2104

client_object=None):

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)

2105

1816

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

2106

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

1817

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

2107

1818

# Wait for other process to exit

2108

1819

proc.join()

2109

1820

return False

2130

1841

parent_pipe.send(False)

2131

1842

return False

2132

1843

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))

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))

2140

1852

parent_pipe.send(True)

2141

1853

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

2142

1854

# same fileno

2148

1860

2149

1861

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

2150

1862

funcname)(*args,

2151

**kwargs)))

1863

**kwargs)))

2152

1864

2153

1865

if command == 'getattr':

2154

1866

attrname = request[1]

2155

if isinstance(client_object.__getattribute__(attrname),

2156

collections.Callable):

2157

parent_pipe.send(('function', ))

1867

if callable(client_object.__getattribute__(attrname)):

1868

parent_pipe.send(('function',))

2158

1869

else:

2159

parent_pipe.send((

2160

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

1870

parent_pipe.send(('data', client_object

1871

.__getattribute__(attrname)))

2161

1872

2162

1873

if command == 'setattr':

2163

1874

attrname = request[1]

2167

1878

return True

2168

1879

2169

1880

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

2266

1881

def string_to_delta(interval):

2267

1882

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

2268

1883

2279

1894

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

2280

1895

datetime.timedelta(0, 330)

2281

1896

"""

2282

2283

try:

2284

return rfc3339_duration_to_delta(interval)

2285

except ValueError:

2286

pass

2287

2288

1897

timevalue = datetime.timedelta(0)

2289

1898

for s in interval.split():

2290

1899

try:

2291

suffix = s[-1]

1900

suffix = unicode(s[-1])

2292

1901

value = int(s[:-1])

2293

1902

if suffix == "d":

2294

1903

delta = datetime.timedelta(value)

2301

1910

elif suffix == "w":

2302

1911

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

2303

1912

else:

2304

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

2305

except IndexError as e:

1913

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

1914

except (ValueError, IndexError) as e:

2306

1915

raise ValueError(*(e.args))

2307

1916

timevalue += delta

2308

1917

return timevalue

2321

1930

sys.exit()

2322

1931

if not noclose:

2323

1932

# Close all standard open file descriptors

2324

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

1933

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

2325

1934

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

2326

1935

raise OSError(errno.ENODEV,

2327

"{} not a character device"

2328

.format(os.devnull))

1936

"%s not a character device"

1937

% os.path.devnull)

2329

1938

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

2330

1939

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

2331

1940

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

2340

1949

2341

1950

parser = argparse.ArgumentParser()

2342

1951

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

2343

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

1952

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

2344

1953

help="show version number and exit")

2345

1954

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

2346

1955

help="Bind to interface IF")

2352

1961

help="Run self-test")

2353

1962

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

2354

1963

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

2355

" to terminal", default=None)

1964

" to terminal")

2356

1965

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

2357

1966

help="Debug level for stdout output")

2358

1967

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

2365

1974

" files")

2366

1975

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

2367

1976

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

2368

" system bus interface", default=None)

1977

" system bus interface")

2369

1978

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

2370

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

2371

default=None)

1979

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

2372

1980

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

2373

1981

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

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")

1982

" state")

2378

1983

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

2379

1984

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)

2385

1985

2386

1986

options = parser.parse_args()

2387

1987

2388

1988

if options.check:

2389

1989

import doctest

2390

fail_count, test_count = doctest.testmod()

2391

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

1990

doctest.testmod()

1991

sys.exit()

2392

1992

2393

1993

# Default values for config file for server-global settings

2394

1994

server_defaults = { "interface": "",

2396

1996

"port": "",

2397

1997

"debug": "False",

2398

1998

"priority":

2399

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

2400

":+SIGN-DSA-SHA256",

1999

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

2401

2000

"servicename": "Mandos",

2402

2001

"use_dbus": "True",

2403

2002

"use_ipv6": "True",

2404

2003

"debuglevel": "",

2405

2004

"restore": "True",

2406

"socket": "",

2407

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

2408

"foreground": "False",

2409

"zeroconf": "True",

2410

}

2005

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

2006

}

2411

2007

2412

2008

# Parse config file for server-global settings

2413

2009

server_config = configparser.SafeConfigParser(server_defaults)

2414

2010

del server_defaults

2415

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

2011

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

2012

"mandos.conf"))

2416

2013

# Convert the SafeConfigParser object to a dict

2417

2014

server_settings = server_config.defaults()

2418

2015

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

2419

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

2016

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

2420

2017

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

2421

2018

option)

2422

2019

if server_settings["port"]:

2423

2020

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

2424

2021

"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"])

2434

2022

del server_config

2435

2023

2436

2024

# Override the settings from the config file with command line

2437

2025

# options, if set.

2438

2026

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

2439

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

2440

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

2441

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

2027

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

2028

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

2029

"statedir"):

2442

2030

value = getattr(options, option)

2443

2031

if value is not None:

2444

2032

server_settings[option] = value

2445

2033

del options

2446

2034

# Force all strings to be unicode

2447

2035

for option in server_settings.keys():

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

2036

if type(server_settings[option]) is str:

2037

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

2458

2038

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

2459

2039

2460

2040

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

2461

2041

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

2467

2042

# For convenience

2468

2043

debug = server_settings["debug"]

2469

2044

debuglevel = server_settings["debuglevel"]

2471

2046

use_ipv6 = server_settings["use_ipv6"]

2472

2047

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

2473

2048

stored_state_file)

2474

foreground = server_settings["foreground"]

2475

zeroconf = server_settings["zeroconf"]

2476

2049

2477

2050

if debug:

2478

initlogger(debug, logging.DEBUG)

2051

initlogger(logging.DEBUG)

2479

2052

else:

2480

2053

if not debuglevel:

2481

initlogger(debug)

2054

initlogger()

2482

2055

else:

2483

2056

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

2484

initlogger(debug, level)

2057

initlogger(level)

2485

2058

2486

2059

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

2487

syslogger.setFormatter(

2488

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

2489

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

2490

server_settings["servicename"])))

2060

syslogger.setFormatter(logging.Formatter

2061

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

2062

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

2063

% server_settings["servicename"]))

2491

2064

2492

2065

# Parse config file with clients

2493

client_config = configparser.SafeConfigParser(Client

2494

.client_defaults)

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)

2495

2075

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

2496

2076

"clients.conf"))

2497

2077

2498

2078

global mandos_dbus_service

2499

2079

mandos_dbus_service = None

2500

2080

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

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"

2517

2092

try:

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)

2093

pidfile = open(pidfilename, "w")

2094

except IOError:

2095

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

2522

2096

2523

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

2097

try:

2098

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

2099

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

2100

except KeyError:

2524

2101

try:

2525

uid = pwd.getpwnam(name).pw_uid

2526

gid = pwd.getpwnam(name).pw_gid

2527

break

2102

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

2103

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

2528

2104

except KeyError:

2529

continue

2530

else:

2531

uid = 65534

2532

gid = 65534

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

2533

2111

try:

2534

2112

os.setgid(gid)

2535

2113

os.setuid(uid)

2536

2114

except OSError as error:

2537

if error.errno != errno.EPERM:

2538

raise

2115

if error[0] != errno.EPERM:

2116

raise error

2539

2117

2540

2118

if debug:

2541

2119

# Enable all possible GnuTLS debugging

2548

2126

def debug_gnutls(level, string):

2549

2127

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

2550

2128

2551

gnutls.library.functions.gnutls_global_set_log_function(

2552

debug_gnutls)

2129

(gnutls.library.functions

2130

.gnutls_global_set_log_function(debug_gnutls))

2553

2131

2554

2132

# Redirect stdin so all checkers get /dev/null

2555

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

2133

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

2556

2134

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

2557

2135

if null > 2:

2558

2136

os.close(null)

2137

else:

2138

# No console logging

2139

logger.removeHandler(console)

2559

2140

2560

2141

# Need to fork before connecting to D-Bus

2561

if not foreground:

2142

if not debug:

2562

2143

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

2563

2144

daemon()

2564

2145

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

2569

2146

global main_loop

2570

2147

# From the Avahi example code

2571

DBusGMainLoop(set_as_default=True)

2148

DBusGMainLoop(set_as_default=True )

2572

2149

main_loop = gobject.MainLoop()

2573

2150

bus = dbus.SystemBus()

2574

2151

# End of Avahi example code

2575

2152

if use_dbus:

2576

2153

try:

2577

2154

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

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)

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")

2585

2161

use_dbus = False

2586

2162

server_settings["use_dbus"] = False

2587

2163

tcp_server.use_dbus = False

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"))

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"])))

2598

2172

2599

2173

global multiprocessing_manager

2600

2174

multiprocessing_manager = multiprocessing.Manager()

2601

2175

2602

2176

client_class = Client

2603

2177

if use_dbus:

2604

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

2605

2606

client_settings = Client.config_parser(client_config)

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

2607

2204

old_client_settings = {}

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()

2205

clients_data = []

2617

2206

2618

2207

# Get client data and settings from last running state.

2619

2208

if server_settings["restore"]:

2620

2209

try:

2621

2210

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

2622

clients_data, old_client_settings = pickle.load(

2623

stored_state)

2211

clients_data, old_client_settings = (pickle.load

2212

(stored_state))

2624

2213

os.remove(stored_state_path)

2625

2214

except IOError as e:

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)

2215

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

2216

.format(e))

2217

if e.errno != errno.ENOENT:

2632

2218

raise

2633

except EOFError as e:

2634

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

2635

"EOFError:",

2636

exc_info=e)

2637

2219

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

2220

with Crypto() as crypt:

2221

for client in clients_data:

2222

client_name = client["name"]

2643

2223

2644

2224

# Decide which value to use after restoring saved state.

2645

2225

# We have three different values: Old config file,

2651

2231

# For each value in new config, check if it

2652

2232

# differs from the old config value (Except for

2653

2233

# the "secret" attribute)

2654

if (name != "secret"

2655

and (value !=

2656

old_client_settings[client_name][name])):

2657

client[name] = value

2234

if (name != "secret" and

2235

value != old_client_settings[client_name]

2236

[name]):

2237

setattr(client, name, value)

2658

2238

except KeyError:

2659

2239

pass

2660

2240

2661

2241

# Clients who has passed its expire date can still be

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"]))

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:

2681

2250

client["enabled"] = False

2682

2251

else:

2683

client["expires"] = (

2684

datetime.datetime.utcnow()

2685

+ client["timeout"])

2686

logger.debug("Last checker succeeded,"

2687

" keeping {} enabled".format(

2688

client_name))

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

2689

2284

try:

2690

client["secret"] = pgp.decrypt(

2691

client["encrypted_secret"],

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:

2291

# If decryption fails, we use secret from new settings

2292

tcp_server.clients[client_name].secret = (

2692

2293

client_settings[client_name]["secret"])

2693

except PGPError:

2694

# If decryption fails, we use secret from new settings

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)

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]))

2714

2304

2715

2305

if not tcp_server.clients:

2716

2306

logger.warning("No clients defined")

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

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

2728

2320

del pidfilename

2321

2322

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

2729

2323

2730

2324

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

2731

2325

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

2732

2326

2733

2327

if use_dbus:

2734

2735

@alternate_dbus_interfaces(

2736

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

2737

class MandosDBusService(DBusObjectWithProperties):

2328

class MandosDBusService(dbus.service.Object):

2738

2329

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

2739

2740

2330

def __init__(self):

2741

2331

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

2742

2743

2332

_interface = "se.recompile.Mandos"

2744

2333

2745

@dbus_interface_annotations(_interface)

2746

def _foo(self):

2747

return {

2748

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

2749

"false" }

2750

2751

2334

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

2752

2335

def ClientAdded(self, objpath):

2753

2336

"D-Bus signal"

2766

2349

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

2767

2350

def GetAllClients(self):

2768

2351

"D-Bus method"

2769

return dbus.Array(c.dbus_object_path for c in

2352

return dbus.Array(c.dbus_object_path

2353

for c in

2770

2354

tcp_server.clients.itervalues())

2771

2355

2772

2356

@dbus.service.method(_interface,

2774

2358

def GetAllClientsWithProperties(self):

2775

2359

"D-Bus method"

2776

2360

return dbus.Dictionary(

2777

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

2778

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

2361

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

2362

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

2779

2363

signature="oa{sv}")

2780

2364

2781

2365

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

2794

2378

2795

2379

del _interface

2796

2380

2797

mandos_dbus_service = MandosDBusService()

2381

class MandosDBusServiceTransitional(MandosDBusService):

2382

__metaclass__ = AlternateDBusNamesMetaclass

2383

mandos_dbus_service = MandosDBusServiceTransitional()

2798

2384

2799

2385

def cleanup():

2800

2386

"Cleanup function; run on exit"

2801

if zeroconf:

2802

service.cleanup()

2387

service.cleanup()

2803

2388

2804

2389

multiprocessing.active_children()

2805

wnull.close()

2806

2390

if not (tcp_server.clients or client_settings):

2807

2391

return

2808

2392

2809

2393

# Store client before exiting. Secrets are encrypted with key

2810

2394

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

2811

2395

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

2812

clients = {}

2813

with PGPEngine() as pgp:

2396

clients = []

2397

with Crypto() as crypt:

2814

2398

for client in tcp_server.clients.itervalues():

2815

2399

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

2816

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

2817

key)

2400

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

2401

key)

2818

2402

client_dict = {}

2819

2403

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):

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)):

2826

2409

exclude.add(name)

2827

2410

2828

2411

client_dict["encrypted_secret"] = (client

2831

2414

if attr not in exclude:

2832

2415

client_dict[attr] = getattr(client, attr)

2833

2416

2834

clients[client.name] = client_dict

2417

clients.append(client_dict)

2835

2418

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

2836

2419

2837

2420

try:

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:

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:

2844

2424

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

2845

tempname = stored_state.name

2846

os.rename(tempname, stored_state_path)

2847

2425

except (IOError, OSError) as e:

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)

2426

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

2427

.format(e))

2428

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

2859

2429

raise

2860

2430

2861

2431

# Delete all clients, and settings from config

2867

2437

client.disable(quiet=True)

2868

2438

if use_dbus:

2869

2439

# Emit D-Bus signal

2870

mandos_dbus_service.ClientRemoved(

2871

client.dbus_object_path, client.name)

2440

mandos_dbus_service.ClientRemoved(client

2441

.dbus_object_path,

2442

client.name)

2872

2443

client_settings.clear()

2873

2444

2874

2445

atexit.register(cleanup)

2885

2456

tcp_server.server_activate()

2886

2457

2887

2458

# Find out what port we got

2888

if zeroconf:

2889

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

2459

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

2890

2460

if use_ipv6:

2891

2461

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

2892

" flowinfo %d, scope_id %d",

2893

*tcp_server.socket.getsockname())

2462

" flowinfo %d, scope_id %d"

2463

% tcp_server.socket.getsockname())

2894

2464

else: # IPv4

2895

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

2896

*tcp_server.socket.getsockname())

2465

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

2466

% tcp_server.socket.getsockname())

2897

2467

2898

2468

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

2899

2469

2900

2470

try:

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

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

2910

2479

2911

2480

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

2912

2481

lambda *args, **kwargs:

2916

2485

logger.debug("Starting main loop")

2917

2486

main_loop.run()

2918

2487

except AvahiError as error:

2919

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

2488

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

2920

2489

cleanup()

2921

2490

sys.exit(1)

2922

2491

except KeyboardInterrupt: