/mandos/release : revision 237.7.370

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

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#

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# Everything else is

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#

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

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

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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import SocketServer as socketserver

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from future_builtins import *

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import hashlib

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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try:

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from gi.repository import GObject

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except ImportError:

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import gobject as GObject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import Crypto.Cipher.AES

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.4.1"

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stored_state_path = "/var/lib/mandos/clients.pickle"

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version = "1.7.3"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = str("/dev/log")))

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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

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

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return interface_index

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def initlogger(level=logging.WARNING):

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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"""A simple class for OpenPGP symmetric encryption & decryption"""

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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output = subprocess.check_output(["gpgconf"])

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for line in output.splitlines():

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name, text, path = line.split(":")

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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def __exit__(self, exc_type, exc_value, traceback):

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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for root, dirs, files in os.walk(self.tempdir,

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topdown = False):

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for filename in files:

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os.remove(os.path.join(root, filename))

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for dirname in dirs:

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os.rmdir(os.path.join(root, dirname))

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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# Passphrase can not be empty and can not contain newlines or

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# NUL bytes. So we prefix it and hex encode it.

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encoded = b"mandos" + binascii.hexlify(password)

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if len(encoded) > 2048:

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# GnuPG can't handle long passwords, so encode differently

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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class AvahiError(Exception):

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

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self.value = value

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

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def __unicode__(self):

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return unicode(repr(self.value))

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

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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302

self.entry_group_state_changed_match = None

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def rename(self):

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def rename(self, remove=True):

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

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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

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self.name)

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self.remove()

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if remove:

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

321

if (error.get_dbus_name()

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

323

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

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

232

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

238

369

self.rename()

239

370

elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

242

raise AvahiGroupError("State changed: %s"

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% unicode(error))

372

str(error))

373

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

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244

375

def cleanup(self):

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376

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

246

377

if self.group is not None:

251

382

pass

252

383

self.group = None

253

384

self.remove()

385

254

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

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387

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

256

388

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

257

bad_states = { avahi.SERVER_INVALID:

258

"Zeroconf server invalid",

259

avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

262

avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

389

bad_states = {

390

avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION: "Zeroconf server name collision",

393

avahi.SERVER_FAILURE: "Zeroconf server failure",

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}

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395

if state in bad_states:

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396

if bad_states[state] is not None:

266

397

if error is None:

269

400

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

270

401

self.cleanup()

271

402

elif state == avahi.SERVER_RUNNING:

272

self.add()

403

try:

404

self.add()

405

except dbus.exceptions.DBusException as error:

406

if (error.get_dbus_name()

407

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

408

logger.info("Local Zeroconf service name"

409

" collision.")

410

return self.rename(remove=False)

411

else:

412

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

413

self.cleanup()

414

os._exit(1)

273

415

else:

274

416

if error is None:

275

417

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

276

418

else:

277

419

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

420

278

421

def activate(self):

279

422

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

280

423

if self.server is None:

284

427

follow_name_owner_changes=True),

285

428

avahi.DBUS_INTERFACE_SERVER)

286

429

self.server.connect_to_signal("StateChanged",

287

self.server_state_changed)

430

self.server_state_changed)

288

431

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

289

432

433

290

434

class AvahiServiceToSyslog(AvahiService):

291

def rename(self):

435

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

292

436

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

293

ret = AvahiService.rename(self)

294

syslogger.setFormatter(logging.Formatter

295

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

296

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

297

% self.name))

437

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

438

syslogger.setFormatter(logging.Formatter(

439

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

440

.format(self.name)))

298

441

return ret

299

442

300

def _timedelta_to_milliseconds(td):

301

"Convert a datetime.timedelta() to milliseconds"

302

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

303

+ (td.seconds * 1000)

304

+ (td.microseconds // 1000))

305

443

# Pretend that we have a GnuTLS module

444

class GnuTLS(object):

445

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

446

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

447

448

_library = ctypes.cdll.LoadLibrary(

449

ctypes.util.find_library("gnutls"))

450

_need_version = "3.3.0"

451

def __init__(self):

452

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

453

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

454

# happens.

455

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

456

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

457

.format(self._need_version))

458

459

# Unless otherwise indicated, the constants and types below are

460

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

461

462

# Constants

463

E_SUCCESS = 0

464

E_INTERRUPTED = -52

465

E_AGAIN = -28

466

CRT_OPENPGP = 2

467

CLIENT = 2

468

SHUT_RDWR = 0

469

CRD_CERTIFICATE = 1

470

E_NO_CERTIFICATE_FOUND = -49

471

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

472

473

# Types

474

class session_int(ctypes.Structure):

475

_fields_ = []

476

session_t = ctypes.POINTER(session_int)

477

class certificate_credentials_st(ctypes.Structure):

478

_fields_ = []

479

certificate_credentials_t = ctypes.POINTER(

480

certificate_credentials_st)

481

certificate_type_t = ctypes.c_int

482

class datum_t(ctypes.Structure):

483

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

484

('size', ctypes.c_uint)]

485

class openpgp_crt_int(ctypes.Structure):

486

_fields_ = []

487

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

488

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

489

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

490

credentials_type_t = ctypes.c_int #

491

transport_ptr_t = ctypes.c_void_p

492

close_request_t = ctypes.c_int

493

494

# Exceptions

495

class Error(Exception):

496

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

497

# exception might be raised from within GnuTLS.__init__,

498

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

499

# global variable has happened.

500

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

501

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

502

# code is passed, convert it to a string with

503

# gnutls.strerror()

504

self.code = code

505

if message is None and code is not None:

506

message = GnuTLS.strerror(code)

507

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

508

message, *args)

509

510

class CertificateSecurityError(Error):

511

pass

512

513

# Classes

514

class Credentials(object):

515

def __init__(self):

516

self._c_object = gnutls.certificate_credentials_t()

517

gnutls.certificate_allocate_credentials(

518

ctypes.byref(self._c_object))

519

self.type = gnutls.CRD_CERTIFICATE

520

521

def __del__(self):

522

gnutls.certificate_free_credentials(self._c_object)

523

524

class ClientSession(object):

525

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

526

self._c_object = gnutls.session_t()

527

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

528

gnutls.set_default_priority(self._c_object)

529

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

530

gnutls.handshake_set_private_extensions(self._c_object,

531

True)

532

self.socket = socket

533

if credentials is None:

534

credentials = gnutls.Credentials()

535

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

536

ctypes.cast(credentials._c_object,

537

ctypes.c_void_p))

538

self.credentials = credentials

539

540

def __del__(self):

541

gnutls.deinit(self._c_object)

542

543

def handshake(self):

544

return gnutls.handshake(self._c_object)

545

546

def send(self, data):

547

data = bytes(data)

548

data_len = len(data)

549

while data_len > 0:

550

data_len -= gnutls.record_send(self._c_object,

551

data[-data_len:],

552

data_len)

553

554

def bye(self):

555

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

556

557

# Error handling functions

558

def _error_code(result):

559

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

560

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

561

if result >= 0:

562

return result

563

if result == gnutls.E_NO_CERTIFICATE_FOUND:

564

raise gnutls.CertificateSecurityError(code = result)

565

raise gnutls.Error(code = result)

566

567

def _retry_on_error(result, func, arguments):

568

"""A function to retry on some errors, suitable

569

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

570

while result < 0:

571

if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):

572

return _error_code(result)

573

result = func(*arguments)

574

return result

575

576

# Unless otherwise indicated, the function declarations below are

577

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

578

579

# Functions

580

priority_set_direct = _library.gnutls_priority_set_direct

581

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

582

ctypes.POINTER(ctypes.c_char_p)]

583

priority_set_direct.restype = _error_code

584

585

init = _library.gnutls_init

586

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

587

init.restype = _error_code

588

589

set_default_priority = _library.gnutls_set_default_priority

590

set_default_priority.argtypes = [session_t]

591

set_default_priority.restype = _error_code

592

593

record_send = _library.gnutls_record_send

594

record_send.argtypes = [session_t, ctypes.c_void_p,

595

ctypes.c_size_t]

596

record_send.restype = ctypes.c_ssize_t

597

record_send.errcheck = _retry_on_error

598

599

certificate_allocate_credentials = (

600

_library.gnutls_certificate_allocate_credentials)

601

certificate_allocate_credentials.argtypes = [

602

ctypes.POINTER(certificate_credentials_t)]

603

certificate_allocate_credentials.restype = _error_code

604

605

certificate_free_credentials = (

606

_library.gnutls_certificate_free_credentials)

607

certificate_free_credentials.argtypes = [certificate_credentials_t]

608

certificate_free_credentials.restype = None

609

610

handshake_set_private_extensions = (

611

_library.gnutls_handshake_set_private_extensions)

612

handshake_set_private_extensions.argtypes = [session_t,

613

ctypes.c_int]

614

handshake_set_private_extensions.restype = None

615

616

credentials_set = _library.gnutls_credentials_set

617

credentials_set.argtypes = [session_t, credentials_type_t,

618

ctypes.c_void_p]

619

credentials_set.restype = _error_code

620

621

strerror = _library.gnutls_strerror

622

strerror.argtypes = [ctypes.c_int]

623

strerror.restype = ctypes.c_char_p

624

625

certificate_type_get = _library.gnutls_certificate_type_get

626

certificate_type_get.argtypes = [session_t]

627

certificate_type_get.restype = _error_code

628

629

certificate_get_peers = _library.gnutls_certificate_get_peers

630

certificate_get_peers.argtypes = [session_t,

631

ctypes.POINTER(ctypes.c_uint)]

632

certificate_get_peers.restype = ctypes.POINTER(datum_t)

633

634

global_set_log_level = _library.gnutls_global_set_log_level

635

global_set_log_level.argtypes = [ctypes.c_int]

636

global_set_log_level.restype = None

637

638

global_set_log_function = _library.gnutls_global_set_log_function

639

global_set_log_function.argtypes = [log_func]

640

global_set_log_function.restype = None

641

642

deinit = _library.gnutls_deinit

643

deinit.argtypes = [session_t]

644

deinit.restype = None

645

646

handshake = _library.gnutls_handshake

647

handshake.argtypes = [session_t]

648

handshake.restype = _error_code

649

handshake.errcheck = _retry_on_error

650

651

transport_set_ptr = _library.gnutls_transport_set_ptr

652

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

653

transport_set_ptr.restype = None

654

655

bye = _library.gnutls_bye

656

bye.argtypes = [session_t, close_request_t]

657

bye.restype = _error_code

658

bye.errcheck = _retry_on_error

659

660

check_version = _library.gnutls_check_version

661

check_version.argtypes = [ctypes.c_char_p]

662

check_version.restype = ctypes.c_char_p

663

664

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

665

666

openpgp_crt_init = _library.gnutls_openpgp_crt_init

667

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

668

openpgp_crt_init.restype = _error_code

669

670

openpgp_crt_import = _library.gnutls_openpgp_crt_import

671

openpgp_crt_import.argtypes = [openpgp_crt_t,

672

ctypes.POINTER(datum_t),

673

openpgp_crt_fmt_t]

674

openpgp_crt_import.restype = _error_code

675

676

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

677

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

678

ctypes.POINTER(ctypes.c_uint)]

679

openpgp_crt_verify_self.restype = _error_code

680

681

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

682

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

683

openpgp_crt_deinit.restype = None

684

685

openpgp_crt_get_fingerprint = (

686

_library.gnutls_openpgp_crt_get_fingerprint)

687

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

688

ctypes.c_void_p,

689

ctypes.POINTER(

690

ctypes.c_size_t)]

691

openpgp_crt_get_fingerprint.restype = _error_code

692

693

# Remove non-public functions

694

del _error_code, _retry_on_error

695

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

696

gnutls = GnuTLS()

697

698

def call_pipe(connection, # : multiprocessing.Connection

699

func, *args, **kwargs):

700

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

701

702

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

703

return value on the provided multiprocessing.Connection.

704

"""

705

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

706

connection.close()

707

306

708

class Client(object):

307

709

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

308

710

309

711

Attributes:

310

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

712

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

311

713

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

312

714

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

313

715

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

314

716

to see if the client lives.

315

717

'None' if no process is running.

316

checker_callback_tag: a gobject event source tag, or None

718

checker_callback_tag: a GObject event source tag, or None

317

719

checker_command: string; External command which is run to check

318

720

if client lives. %() expansions are done at

319

721

runtime with vars(self) as dict, so that for

320

722

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

321

checker_initiator_tag: a gobject event source tag, or None

723

checker_initiator_tag: a GObject event source tag, or None

322

724

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

323

725

client_structure: Object describing what attributes a client has

324

726

and is used for storing the client at exit

325

727

current_checker_command: string; current running checker_command

326

disable_initiator_tag: a gobject event source tag, or None

728

disable_initiator_tag: a GObject event source tag, or None

327

729

enabled: bool()

328

730

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

329

731

uniquely identify the client

331

733

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

332

734

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

333

735

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

334

last_checker_status: integer between 0 and 255 reflecting exit status

335

of last checker. -1 reflect crashed checker,

336

or None.

337

last_enabled: datetime.datetime(); (UTC)

736

last_checker_status: integer between 0 and 255 reflecting exit

737

status of last checker. -1 reflects crashed

738

checker, -2 means no checker completed yet.

739

last_checker_signal: The signal which killed the last checker, if

740

last_checker_status is -1

741

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

338

742

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

339

743

D-Bus identifiers

340

744

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

341

745

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

342

746

until this client is disabled

343

extended_timeout: extra long timeout when password has been sent

747

extended_timeout: extra long timeout when secret has been sent

344

748

runtime_expansions: Allowed attributes for runtime expansion.

345

749

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

346

750

disabled, or None

751

server_settings: The server_settings dict from main()

347

752

"""

348

753

349

754

runtime_expansions = ("approval_delay", "approval_duration",

350

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

351

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

755

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

756

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

757

"last_approval_request", "last_checked_ok",

352

758

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

353

354

def timeout_milliseconds(self):

355

"Return the 'timeout' attribute in milliseconds"

356

return _timedelta_to_milliseconds(self.timeout)

357

358

def extended_timeout_milliseconds(self):

359

"Return the 'extended_timeout' attribute in milliseconds"

360

return _timedelta_to_milliseconds(self.extended_timeout)

361

362

def interval_milliseconds(self):

363

"Return the 'interval' attribute in milliseconds"

364

return _timedelta_to_milliseconds(self.interval)

365

366

def approval_delay_milliseconds(self):

367

return _timedelta_to_milliseconds(self.approval_delay)

368

369

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

370

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

371

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

372

attribute."""

759

client_defaults = {

760

"timeout": "PT5M",

761

"extended_timeout": "PT15M",

762

"interval": "PT2M",

763

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

764

"host": "",

765

"approval_delay": "PT0S",

766

"approval_duration": "PT1S",

767

"approved_by_default": "True",

768

"enabled": "True",

769

}

770

771

@staticmethod

772

def config_parser(config):

773

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

774

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

775

with exceptions for any special settings as defined above.

776

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

777

value given the same arguments.

778

"""

779

settings = {}

780

for client_name in config.sections():

781

section = dict(config.items(client_name))

782

client = settings[client_name] = {}

783

784

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

785

# Reformat values from string types to Python types

786

client["approved_by_default"] = config.getboolean(

787

client_name, "approved_by_default")

788

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

789

"enabled")

790

791

# Uppercase and remove spaces from fingerprint for later

792

# comparison purposes with return value from the

793

# fingerprint() function

794

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

795

.replace(" ", ""))

796

if "secret" in section:

797

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

798

elif "secfile" in section:

799

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

800

(section["secfile"])),

801

"rb") as secfile:

802

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

803

else:

804

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

805

.format(section))

806

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

807

client["extended_timeout"] = string_to_delta(

808

section["extended_timeout"])

809

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

810

client["approval_delay"] = string_to_delta(

811

section["approval_delay"])

812

client["approval_duration"] = string_to_delta(

813

section["approval_duration"])

814

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

815

client["last_approval_request"] = None

816

client["last_checked_ok"] = None

817

client["last_checker_status"] = -2

818

819

return settings

820

821

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

373

822

self.name = name

374

if config is None:

375

config = {}

823

if server_settings is None:

824

server_settings = {}

825

self.server_settings = server_settings

826

# adding all client settings

827

for setting, value in settings.items():

828

setattr(self, setting, value)

829

830

if self.enabled:

831

if not hasattr(self, "last_enabled"):

832

self.last_enabled = datetime.datetime.utcnow()

833

if not hasattr(self, "expires"):

834

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

835

+ self.timeout)

836

else:

837

self.last_enabled = None

838

self.expires = None

839

376

840

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

377

# Uppercase and remove spaces from fingerprint for later

378

# comparison purposes with return value from the fingerprint()

379

# function

380

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

381

.replace(" ", ""))

382

841

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

383

if "secret" in config:

384

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

385

elif "secfile" in config:

386

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

387

(config["secfile"])),

388

"rb") as secfile:

389

self.secret = secfile.read()

390

else:

391

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

392

% self.name)

393

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

394

self.created = datetime.datetime.utcnow()

395

self.enabled = True

396

self.last_approval_request = None

397

self.last_enabled = datetime.datetime.utcnow()

398

self.last_checked_ok = None

399

self.last_checker_status = None

400

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

401

self.extended_timeout = string_to_delta(config

402

["extended_timeout"])

403

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

842

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

843

datetime.datetime.utcnow())

844

845

# attributes specific for this server instance

404

846

self.checker = None

405

847

self.checker_initiator_tag = None

406

848

self.disable_initiator_tag = None

407

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

408

849

self.checker_callback_tag = None

409

self.checker_command = config["checker"]

410

850

self.current_checker_command = None

411

self._approved = None

412

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

413

True)

851

self.approved = None

414

852

self.approvals_pending = 0

415

self.approval_delay = string_to_delta(

416

config["approval_delay"])

417

self.approval_duration = string_to_delta(

418

config["approval_duration"])

419

self.changedstate = (multiprocessing_manager

420

.Condition(multiprocessing_manager

421

.Lock()))

422

self.client_structure = [attr for attr in self.__dict__.iterkeys() if not attr.startswith("_")]

853

self.changedstate = multiprocessing_manager.Condition(

854

multiprocessing_manager.Lock())

855

self.client_structure = [attr

856

for attr in self.__dict__.iterkeys()

857

if not attr.startswith("_")]

423

858

self.client_structure.append("client_structure")

424

859

425

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

426

lambda obj: isinstance(obj, property)):

860

for name, t in inspect.getmembers(

861

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

427

862

if not name.startswith("_"):

428

863

self.client_structure.append(name)

429

864

437

872

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

438

873

# Already enabled

439

874

return

440

self.send_changedstate()

441

875

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

442

876

self.enabled = True

443

877

self.last_enabled = datetime.datetime.utcnow()

444

878

self.init_checker()

879

self.send_changedstate()

445

880

446

881

def disable(self, quiet=True):

447

882

"""Disable this client."""

448

883

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

449

884

return False

450

885

if not quiet:

451

self.send_changedstate()

452

if not quiet:

453

886

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

454

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

455

gobject.source_remove(self.disable_initiator_tag)

887

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

888

GObject.source_remove(self.disable_initiator_tag)

456

889

self.disable_initiator_tag = None

457

890

self.expires = None

458

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

459

gobject.source_remove(self.checker_initiator_tag)

891

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

892

GObject.source_remove(self.checker_initiator_tag)

460

893

self.checker_initiator_tag = None

461

894

self.stop_checker()

462

895

self.enabled = False

463

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

896

if not quiet:

897

self.send_changedstate()

898

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

464

899

return False

465

900

466

901

def __del__(self):

469

904

def init_checker(self):

470

905

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

471

906

# and every interval from then on.

472

self.checker_initiator_tag = (gobject.timeout_add

473

(self.interval_milliseconds(),

474

self.start_checker))

907

if self.checker_initiator_tag is not None:

908

GObject.source_remove(self.checker_initiator_tag)

909

self.checker_initiator_tag = GObject.timeout_add(

910

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

911

self.start_checker)

475

912

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

476

self.disable_initiator_tag = (gobject.timeout_add

477

(self.timeout_milliseconds(),

478

self.disable))

913

if self.disable_initiator_tag is not None:

914

GObject.source_remove(self.disable_initiator_tag)

915

self.disable_initiator_tag = GObject.timeout_add(

916

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

479

917

# Also start a new checker *right now*.

480

918

self.start_checker()

481

919

482

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

920

def checker_callback(self, source, condition, connection,

921

command):

483

922

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

484

923

self.checker_callback_tag = None

485

924

self.checker = None

486

if os.WIFEXITED(condition):

487

self.last_checker_status = os.WEXITSTATUS(condition)

925

# Read return code from connection (see call_pipe)

926

returncode = connection.recv()

927

connection.close()

928

929

if returncode >= 0:

930

self.last_checker_status = returncode

931

self.last_checker_signal = None

488

932

if self.last_checker_status == 0:

489

933

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

490

934

vars(self))

491

935

self.checked_ok()

492

936

else:

493

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

494

vars(self))

937

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

495

938

else:

496

939

self.last_checker_status = -1

940

self.last_checker_signal = -returncode

497

941

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

498

942

vars(self))

499

500

def checked_ok(self, timeout=None):

501

"""Bump up the timeout for this client.

502

503

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

504

alive and well.

505

"""

943

return False

944

945

def checked_ok(self):

946

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

947

self.last_checked_ok = datetime.datetime.utcnow()

948

self.last_checker_status = 0

949

self.last_checker_signal = None

950

self.bump_timeout()

951

952

def bump_timeout(self, timeout=None):

953

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

506

954

if timeout is None:

507

955

timeout = self.timeout

508

self.last_checked_ok = datetime.datetime.utcnow()

509

956

if self.disable_initiator_tag is not None:

510

gobject.source_remove(self.disable_initiator_tag)

957

GObject.source_remove(self.disable_initiator_tag)

958

self.disable_initiator_tag = None

511

959

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

512

self.disable_initiator_tag = (gobject.timeout_add

513

(_timedelta_to_milliseconds

514

(timeout), self.disable))

960

self.disable_initiator_tag = GObject.timeout_add(

961

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

515

962

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

516

963

517

964

def need_approval(self):

523

970

If a checker already exists, leave it running and do

524

971

nothing."""

525

972

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

526

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

527

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

528

# client would inevitably timeout, since no checker would get

529

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

973

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

974

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

975

# would inevitably timeout, since no checker would get a

976

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

530

977

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

531

978

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

532

979

# should be.

533

980

534

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

535

try:

536

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

537

except (AttributeError, OSError) as error:

538

if (isinstance(error, OSError)

539

and error.errno != errno.ECHILD):

540

raise error

541

else:

542

if pid:

543

logger.warning("Checker was a zombie")

544

gobject.source_remove(self.checker_callback_tag)

545

self.checker_callback(pid, status,

546

self.current_checker_command)

981

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

982

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

983

self.checker.join()

984

self.checker = None

547

985

# Start a new checker if needed

548

986

if self.checker is None:

987

# Escape attributes for the shell

988

escaped_attrs = {

989

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

990

for attr in self.runtime_expansions }

549

991

try:

550

# In case checker_command has exactly one % operator

551

command = self.checker_command % self.host

552

except TypeError:

553

# Escape attributes for the shell

554

escaped_attrs = dict(

555

(attr,

556

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

557

errors=

558

'replace')))

559

for attr in

560

self.runtime_expansions)

561

562

try:

563

command = self.checker_command % escaped_attrs

564

except TypeError as error:

565

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

566

' %s', self.checker_command, error)

567

return True # Try again later

992

command = self.checker_command % escaped_attrs

993

except TypeError as error:

994

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

995

self.checker_command,

996

exc_info=error)

997

return True # Try again later

568

998

self.current_checker_command = command

569

try:

570

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

571

command, self.name)

572

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

573

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

574

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

575

# always replaced by /dev/null.)

576

self.checker = subprocess.Popen(command,

577

close_fds=True,

578

shell=True, cwd="/")

579

self.checker_callback_tag = (gobject.child_watch_add

580

(self.checker.pid,

581

self.checker_callback,

582

data=command))

583

# The checker may have completed before the gobject

584

# watch was added. Check for this.

585

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

586

if pid:

587

gobject.source_remove(self.checker_callback_tag)

588

self.checker_callback(pid, status, command)

589

except OSError as error:

590

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

591

error)

592

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

999

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

1000

self.name)

1001

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

1002

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

1003

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

1004

# always replaced by /dev/null.)

1005

# The exception is when not debugging but nevertheless

1006

# running in the foreground; use the previously

1007

# created wnull.

1008

popen_args = { "close_fds": True,

1009

"shell": True,

1010

"cwd": "/" }

1011

if (not self.server_settings["debug"]

1012

and self.server_settings["foreground"]):

1013

popen_args.update({"stdout": wnull,

1014

"stderr": wnull })

1015

pipe = multiprocessing.Pipe(duplex = False)

1016

self.checker = multiprocessing.Process(

1017

target = call_pipe,

1018

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

1019

kwargs = popen_args)

1020

self.checker.start()

1021

self.checker_callback_tag = GObject.io_add_watch(

1022

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

1023

self.checker_callback, pipe[0], command)

1024

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

593

1025

return True

594

1026

595

1027

def stop_checker(self):

596

1028

"""Force the checker process, if any, to stop."""

597

1029

if self.checker_callback_tag:

598

gobject.source_remove(self.checker_callback_tag)

1030

GObject.source_remove(self.checker_callback_tag)

599

1031

self.checker_callback_tag = None

600

1032

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

601

1033

return

602

1034

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

603

try:

604

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

605

#time.sleep(0.5)

606

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

607

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

608

except OSError as error:

609

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

610

raise

1035

self.checker.terminate()

611

1036

self.checker = None

612

613

# Encrypts a client secret and stores it in a varible encrypted_secret

614

def encrypt_secret(self, key):

615

# Encryption-key need to be of a specific size, so we hash inputed key

616

hasheng = hashlib.sha256()

617

hasheng.update(key)

618

encryptionkey = hasheng.digest()

619

620

# Create validation hash so we know at decryption if it was sucessful

621

hasheng = hashlib.sha256()

622

hasheng.update(self.secret)

623

validationhash = hasheng.digest()

624

625

# Encrypt secret

626

iv = os.urandom(Crypto.Cipher.AES.block_size)

627

ciphereng = Crypto.Cipher.AES.new(encryptionkey,

628

Crypto.Cipher.AES.MODE_CFB, iv)

629

ciphertext = ciphereng.encrypt(validationhash+self.secret)

630

self.encrypted_secret = (ciphertext, iv)

631

632

# Decrypt a encrypted client secret

633

def decrypt_secret(self, key):

634

# Decryption-key need to be of a specific size, so we hash inputed key

635

hasheng = hashlib.sha256()

636

hasheng.update(key)

637

encryptionkey = hasheng.digest()

638

639

# Decrypt encrypted secret

640

ciphertext, iv = self.encrypted_secret

641

ciphereng = Crypto.Cipher.AES.new(encryptionkey,

642

Crypto.Cipher.AES.MODE_CFB, iv)

643

plain = ciphereng.decrypt(ciphertext)

644

645

# Validate decrypted secret to know if it was succesful

646

hasheng = hashlib.sha256()

647

validationhash = plain[:hasheng.digest_size]

648

secret = plain[hasheng.digest_size:]

649

hasheng.update(secret)

650

651

# if validation fails, we use key as new secret. Otherwhise, we use

652

# the decrypted secret

653

if hasheng.digest() == validationhash:

654

self.secret = secret

655

else:

656

self.secret = key

657

del self.encrypted_secret

658

659

660

def dbus_service_property(dbus_interface, signature="v",

661

access="readwrite", byte_arrays=False):

1037

1038

1039

def dbus_service_property(dbus_interface,

1040

signature="v",

1041

access="readwrite",

1042

byte_arrays=False):

662

1043

"""Decorators for marking methods of a DBusObjectWithProperties to

663

1044

become properties on the D-Bus.

664

1045

673

1054

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

674

1055

if byte_arrays and signature != "ay":

675

1056

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

676

" signature %r" % signature)

1057

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

1058

677

1059

def decorator(func):

678

1060

func._dbus_is_property = True

679

1061

func._dbus_interface = dbus_interface

684

1066

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

685

1067

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

686

1068

return func

1069

1070

return decorator

1071

1072

1073

def dbus_interface_annotations(dbus_interface):

1074

"""Decorator for marking functions returning interface annotations

1075

1076

Usage:

1077

1078

@dbus_interface_annotations("org.example.Interface")

1079

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

1080

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

1081

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

1082

"false"}

1083

"""

1084

1085

def decorator(func):

1086

func._dbus_is_interface = True

1087

func._dbus_interface = dbus_interface

1088

func._dbus_name = dbus_interface

1089

return func

1090

1091

return decorator

1092

1093

1094

def dbus_annotations(annotations):

1095

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

1096

Usage:

1097

1098

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

1099

"org.freedesktop.DBus.Property."

1100

"EmitsChangedSignal": "false"})

1101

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

1102

access="r")

1103

def Property_dbus_property(self):

1104

return dbus.Boolean(False)

1105

1106

See also the DBusObjectWithAnnotations class.

1107

"""

1108

1109

def decorator(func):

1110

func._dbus_annotations = annotations

1111

return func

1112

687

1113

return decorator

688

1114

689

1115

690

1116

class DBusPropertyException(dbus.exceptions.DBusException):

691

1117

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

692

1118

"""

693

def __unicode__(self):

694

return unicode(str(self))

1119

pass

695

1120

696

1121

697

1122

class DBusPropertyAccessException(DBusPropertyException):

706

1131

pass

707

1132

708

1133

709

class DBusObjectWithProperties(dbus.service.Object):

1134

class DBusObjectWithAnnotations(dbus.service.Object):

1135

"""A D-Bus object with annotations.

1136

1137

Classes inheriting from this can use the dbus_annotations

1138

decorator to add annotations to methods or signals.

1139

"""

1140

1141

@staticmethod

1142

def _is_dbus_thing(thing):

1143

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

1144

1145

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

1146

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

1147

"""

1148

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

1149

False)

1150

1151

def _get_all_dbus_things(self, thing):

1152

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

1153

"""

1154

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

1155

athing.__get__(self))

1156

for cls in self.__class__.__mro__

1157

for name, athing in

1158

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

1159

1160

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1161

out_signature = "s",

1162

path_keyword = 'object_path',

1163

connection_keyword = 'connection')

1164

def Introspect(self, object_path, connection):

1165

"""Overloading of standard D-Bus method.

1166

1167

Inserts annotation tags on methods and signals.

1168

"""

1169

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

1170

connection)

1171

try:

1172

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

1173

1174

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

1175

# Add annotation tags

1176

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

1177

for tag in if_tag.getElementsByTagName(typ):

1178

annots = dict()

1179

for name, prop in (self.

1180

_get_all_dbus_things(typ)):

1181

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

1182

and prop._dbus_interface

1183

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

1184

annots.update(getattr(

1185

prop, "_dbus_annotations", {}))

1186

for name, value in annots.items():

1187

ann_tag = document.createElement(

1188

"annotation")

1189

ann_tag.setAttribute("name", name)

1190

ann_tag.setAttribute("value", value)

1191

tag.appendChild(ann_tag)

1192

# Add interface annotation tags

1193

for annotation, value in dict(

1194

itertools.chain.from_iterable(

1195

annotations().items()

1196

for name, annotations

1197

in self._get_all_dbus_things("interface")

1198

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

1199

)).items():

1200

ann_tag = document.createElement("annotation")

1201

ann_tag.setAttribute("name", annotation)

1202

ann_tag.setAttribute("value", value)

1203

if_tag.appendChild(ann_tag)

1204

# Fix argument name for the Introspect method itself

1205

if (if_tag.getAttribute("name")

1206

== dbus.INTROSPECTABLE_IFACE):

1207

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

1208

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

1209

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

1210

if (arg.getAttribute("direction")

1211

== "out"):

1212

arg.setAttribute("name",

1213

"xml_data")

1214

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

1215

document.unlink()

1216

except (AttributeError, xml.dom.DOMException,

1217

xml.parsers.expat.ExpatError) as error:

1218

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

1219

exc_info=error)

1220

return xmlstring

1221

1222

1223

class DBusObjectWithProperties(DBusObjectWithAnnotations):

710

1224

"""A D-Bus object with properties.

711

1225

712

1226

Classes inheriting from this can use the dbus_service_property

714

1228

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

715

1229

"""

716

1230

717

@staticmethod

718

def _is_dbus_property(obj):

719

return getattr(obj, "_dbus_is_property", False)

720

721

def _get_all_dbus_properties(self):

722

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

723

"""

724

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

725

for cls in self.__class__.__mro__

726

for name, prop in

727

inspect.getmembers(cls, self._is_dbus_property))

728

729

1231

def _get_dbus_property(self, interface_name, property_name):

730

1232

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

731

1233

property with the specified name and interface.

732

1234

"""

733

for cls in self.__class__.__mro__:

734

for name, value in (inspect.getmembers

735

(cls, self._is_dbus_property)):

1235

for cls in self.__class__.__mro__:

1236

for name, value in inspect.getmembers(

1237

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

736

1238

if (value._dbus_name == property_name

737

1239

and value._dbus_interface == interface_name):

738

1240

return value.__get__(self)

739

1241

740

1242

# No such property

741

raise DBusPropertyNotFound(self.dbus_object_path + ":"

742

+ interface_name + "."

743

+ property_name)

744

745

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

1243

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

1244

self.dbus_object_path, interface_name, property_name))

1245

1246

@classmethod

1247

def _get_all_interface_names(cls):

1248

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

1249

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

1250

"_dbus_interface", None)

1251

for x in (inspect.getmro(cls))

1252

for attr in dir(x))

1253

if name is not None)

1254

1255

@dbus.service.method(dbus.PROPERTIES_IFACE,

1256

in_signature="ss",

746

1257

out_signature="v")

747

1258

def Get(self, interface_name, property_name):

748

1259

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

766

1277

# The byte_arrays option is not supported yet on

767

1278

# signatures other than "ay".

768

1279

if prop._dbus_signature != "ay":

769

raise ValueError

770

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

771

for byte in value))

1280

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

1281

"'ay' signature {!r}"

1282

.format(prop._dbus_signature))

1283

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

1284

for byte in value))

772

1285

prop(value)

773

1286

774

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

1287

@dbus.service.method(dbus.PROPERTIES_IFACE,

1288

in_signature="s",

775

1289

out_signature="a{sv}")

776

1290

def GetAll(self, interface_name):

777

1291

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

780

1294

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

781

1295

"""

782

1296

properties = {}

783

for name, prop in self._get_all_dbus_properties():

1297

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

784

1298

if (interface_name

785

1299

and interface_name != prop._dbus_interface):

786

1300

# Interface non-empty but did not match

792

1306

if not hasattr(value, "variant_level"):

793

1307

properties[name] = value

794

1308

continue

795

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

796

value.variant_level+1)

1309

properties[name] = type(value)(

1310

value, variant_level = value.variant_level + 1)

797

1311

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

798

1312

1313

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

1314

def PropertiesChanged(self, interface_name, changed_properties,

1315

invalidated_properties):

1316

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

1317

standard.

1318

"""

1319

pass

1320

799

1321

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

800

1322

out_signature="s",

801

1323

path_keyword='object_path',

802

1324

connection_keyword='connection')

803

1325

def Introspect(self, object_path, connection):

804

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

1326

"""Overloading of standard D-Bus method.

1327

1328

Inserts property tags and interface annotation tags.

805

1329

"""

806

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

807

connection)

1330

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1331

object_path,

1332

connection)

808

1333

try:

809

1334

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

1335

810

1336

def make_tag(document, name, prop):

811

1337

e = document.createElement("property")

812

1338

e.setAttribute("name", name)

813

1339

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

814

1340

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

815

1341

return e

1342

816

1343

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

1344

# Add property tags

817

1345

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

818

1346

for name, prop

819

in self._get_all_dbus_properties()

1347

in self._get_all_dbus_things("property")

820

1348

if prop._dbus_interface

821

1349

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

822

1350

if_tag.appendChild(tag)

1351

# Add annotation tags for properties

1352

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

1353

annots = dict()

1354

for name, prop in self._get_all_dbus_things(

1355

"property"):

1356

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

1357

and prop._dbus_interface

1358

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

1359

annots.update(getattr(

1360

prop, "_dbus_annotations", {}))

1361

for name, value in annots.items():

1362

ann_tag = document.createElement(

1363

"annotation")

1364

ann_tag.setAttribute("name", name)

1365

ann_tag.setAttribute("value", value)

1366

tag.appendChild(ann_tag)

823

1367

# Add the names to the return values for the

824

1368

# "org.freedesktop.DBus.Properties" methods

825

1369

if (if_tag.getAttribute("name")

840

1384

except (AttributeError, xml.dom.DOMException,

841

1385

xml.parsers.expat.ExpatError) as error:

842

1386

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

843

error)

844

return xmlstring

845

846

847

def datetime_to_dbus (dt, variant_level=0):

1387

exc_info=error)

1388

return xmlstring

1389

1390

try:

1391

dbus.OBJECT_MANAGER_IFACE

1392

except AttributeError:

1393

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

1394

1395

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1396

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

1397

1398

Classes inheriting from this exposes the standard

1399

GetManagedObjects call and the InterfacesAdded and

1400

InterfacesRemoved signals on the standard

1401

"org.freedesktop.DBus.ObjectManager" interface.

1402

1403

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

1404

manually.

1405

"""

1406

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1407

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

1408

def GetManagedObjects(self):

1409

"""This function must be overridden"""

1410

raise NotImplementedError()

1411

1412

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1413

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

1414

def InterfacesAdded(self, object_path, interfaces_and_properties):

1415

pass

1416

1417

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

1418

def InterfacesRemoved(self, object_path, interfaces):

1419

pass

1420

1421

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1422

out_signature = "s",

1423

path_keyword = 'object_path',

1424

connection_keyword = 'connection')

1425

def Introspect(self, object_path, connection):

1426

"""Overloading of standard D-Bus method.

1427

1428

Override return argument name of GetManagedObjects to be

1429

"objpath_interfaces_and_properties"

1430

"""

1431

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1432

object_path,

1433

connection)

1434

try:

1435

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

1436

1437

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

1438

# Fix argument name for the GetManagedObjects method

1439

if (if_tag.getAttribute("name")

1440

== dbus.OBJECT_MANAGER_IFACE):

1441

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

1442

if (cn.getAttribute("name")

1443

== "GetManagedObjects"):

1444

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

1445

if (arg.getAttribute("direction")

1446

== "out"):

1447

arg.setAttribute(

1448

"name",

1449

"objpath_interfaces"

1450

"_and_properties")

1451

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

1452

document.unlink()

1453

except (AttributeError, xml.dom.DOMException,

1454

xml.parsers.expat.ExpatError) as error:

1455

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

1456

exc_info = error)

1457

return xmlstring

1458

1459

def datetime_to_dbus(dt, variant_level=0):

848

1460

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

849

1461

if dt is None:

850

1462

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

851

return dbus.String(dt.isoformat(),

852

variant_level=variant_level)

853

854

855

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

856

.__metaclass__):

857

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

858

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

1463

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

1464

1465

1466

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1467

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

1468

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

1469

interface names according to the "alt_interface_names" mapping.

1470

Usage:

1471

1472

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

1473

"net.example.AlternateInterface"})

1474

class SampleDBusObject(dbus.service.Object):

1475

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

1476

def SampleDBusMethod():

1477

pass

1478

1479

The above "SampleDBusMethod" on "SampleDBusObject" will be

1480

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

1481

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

1482

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

1483

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

1484

1485

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

1486

(from DBusObjectWithProperties) and interfaces (from the

1487

dbus_interface_annotations decorator).

859

1488

"""

860

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

861

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

862

# methods, signals, or properties in them

863

for base in (b for b in bases

864

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

865

# Go though all attributes of the base class

866

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

1489

1490

def wrapper(cls):

1491

for orig_interface_name, alt_interface_name in (

1492

alt_interface_names.items()):

1493

attr = {}

1494

interface_names = set()

1495

# Go though all attributes of the class

1496

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

867

1497

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

868

1498

# with the wrong interface name

869

1499

if (not hasattr(attribute, "_dbus_interface")

870

or not attribute._dbus_interface

871

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

1500

or not attribute._dbus_interface.startswith(

1501

orig_interface_name)):

872

1502

continue

873

1503

# Create an alternate D-Bus interface name based on

874

1504

# the current name

875

alt_interface = (attribute._dbus_interface

876

.replace("se.recompile.Mandos",

877

"se.bsnet.fukt.Mandos"))

1505

alt_interface = attribute._dbus_interface.replace(

1506

orig_interface_name, alt_interface_name)

1507

interface_names.add(alt_interface)

878

1508

# Is this a D-Bus signal?

879

1509

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

880

# Extract the original non-method function by

881

# black magic

882

nonmethod_func = (dict(

1510

if sys.version_info.major == 2:

1511

# Extract the original non-method undecorated

1512

# function by black magic

1513

nonmethod_func = (dict(

883

1514

zip(attribute.func_code.co_freevars,

884

attribute.__closure__))["func"]

885

.cell_contents)

1515

attribute.__closure__))

1516

["func"].cell_contents)

1517

else:

1518

nonmethod_func = attribute

886

1519

# Create a new, but exactly alike, function

887

1520

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

888

1521

# with the alternate D-Bus interface name

889

new_function = (dbus.service.signal

890

(alt_interface,

891

attribute._dbus_signature)

892

(types.FunctionType(

893

nonmethod_func.func_code,

894

nonmethod_func.func_globals,

895

nonmethod_func.func_name,

896

nonmethod_func.func_defaults,

897

nonmethod_func.func_closure)))

1522

if sys.version_info.major == 2:

1523

new_function = types.FunctionType(

1524

nonmethod_func.func_code,

1525

nonmethod_func.func_globals,

1526

nonmethod_func.func_name,

1527

nonmethod_func.func_defaults,

1528

nonmethod_func.func_closure)

1529

else:

1530

new_function = types.FunctionType(

1531

nonmethod_func.__code__,

1532

nonmethod_func.__globals__,

1533

nonmethod_func.__name__,

1534

nonmethod_func.__defaults__,

1535

nonmethod_func.__closure__)

1536

new_function = (dbus.service.signal(

1537

alt_interface,

1538

attribute._dbus_signature)(new_function))

1539

# Copy annotations, if any

1540

try:

1541

new_function._dbus_annotations = dict(

1542

attribute._dbus_annotations)

1543

except AttributeError:

1544

pass

898

1545

# Define a creator of a function to call both the

899

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

900

# signals gets sent when the function is called

1546

# original and alternate functions, so both the

1547

# original and alternate signals gets sent when

1548

# the function is called

901

1549

def fixscope(func1, func2):

902

1550

"""This function is a scope container to pass

903

1551

func1 and func2 to the "call_both" function

904

1552

outside of its arguments"""

1553

1554

@functools.wraps(func2)

905

1555

def call_both(*args, **kwargs):

906

1556

"""This function will emit two D-Bus

907

1557

signals by calling func1 and func2"""

908

1558

func1(*args, **kwargs)

909

1559

func2(*args, **kwargs)

1560

# Make wrapper function look like a D-Bus signal

1561

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

1562

if name.startswith("_dbus_"):

1563

setattr(call_both, name, attr)

1564

910

1565

return call_both

911

1566

# Create the "call_both" function and add it to

912

1567

# the class

913

attr[attrname] = fixscope(attribute,

914

new_function)

1568

attr[attrname] = fixscope(attribute, new_function)

915

1569

# Is this a D-Bus method?

916

1570

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

917

1571

# Create a new, but exactly alike, function

918

1572

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

919

1573

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

920

1574

# to the class.

921

attr[attrname] = (dbus.service.method

922

(alt_interface,

923

attribute._dbus_in_signature,

924

attribute._dbus_out_signature)

925

(types.FunctionType

926

(attribute.func_code,

927

attribute.func_globals,

928

attribute.func_name,

929

attribute.func_defaults,

930

attribute.func_closure)))

1575

attr[attrname] = (

1576

dbus.service.method(

1577

alt_interface,

1578

attribute._dbus_in_signature,

1579

attribute._dbus_out_signature)

1580

(types.FunctionType(attribute.func_code,

1581

attribute.func_globals,

1582

attribute.func_name,

1583

attribute.func_defaults,

1584

attribute.func_closure)))

1585

# Copy annotations, if any

1586

try:

1587

attr[attrname]._dbus_annotations = dict(

1588

attribute._dbus_annotations)

1589

except AttributeError:

1590

pass

931

1591

# Is this a D-Bus property?

932

1592

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

933

1593

# Create a new, but exactly alike, function

934

1594

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

935

1595

# property with the alternate D-Bus interface

936

1596

# name. Add it to the class.

937

attr[attrname] = (dbus_service_property

938

(alt_interface,

939

attribute._dbus_signature,

940

attribute._dbus_access,

941

attribute

942

._dbus_get_args_options

943

["byte_arrays"])

944

(types.FunctionType

945

(attribute.func_code,

946

attribute.func_globals,

947

attribute.func_name,

948

attribute.func_defaults,

949

attribute.func_closure)))

950

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

951

952

1597

attr[attrname] = (dbus_service_property(

1598

alt_interface, attribute._dbus_signature,

1599

attribute._dbus_access,

1600

attribute._dbus_get_args_options

1601

["byte_arrays"])

1602

(types.FunctionType(

1603

attribute.func_code,

1604

attribute.func_globals,

1605

attribute.func_name,

1606

attribute.func_defaults,

1607

attribute.func_closure)))

1608

# Copy annotations, if any

1609

try:

1610

attr[attrname]._dbus_annotations = dict(

1611

attribute._dbus_annotations)

1612

except AttributeError:

1613

pass

1614

# Is this a D-Bus interface?

1615

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

1616

# Create a new, but exactly alike, function

1617

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

1618

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

1619

# to the class.

1620

attr[attrname] = (

1621

dbus_interface_annotations(alt_interface)

1622

(types.FunctionType(attribute.func_code,

1623

attribute.func_globals,

1624

attribute.func_name,

1625

attribute.func_defaults,

1626

attribute.func_closure)))

1627

if deprecate:

1628

# Deprecate all alternate interfaces

1629

iname="_AlternateDBusNames_interface_annotation{}"

1630

for interface_name in interface_names:

1631

1632

@dbus_interface_annotations(interface_name)

1633

def func(self):

1634

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

1635

"true" }

1636

# Find an unused name

1637

for aname in (iname.format(i)

1638

for i in itertools.count()):

1639

if aname not in attr:

1640

attr[aname] = func

1641

break

1642

if interface_names:

1643

# Replace the class with a new subclass of it with

1644

# methods, signals, etc. as created above.

1645

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

1646

(cls, ), attr)

1647

return cls

1648

1649

return wrapper

1650

1651

1652

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

1653

"se.bsnet.fukt.Mandos"})

953

1654

class ClientDBus(Client, DBusObjectWithProperties):

954

1655

"""A Client class using D-Bus

955

1656

959

1660

"""

960

1661

961

1662

runtime_expansions = (Client.runtime_expansions

962

+ ("dbus_object_path",))

1663

+ ("dbus_object_path", ))

1664

1665

_interface = "se.recompile.Mandos.Client"

963

1666

964

1667

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

965

1668

966

1669

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

967

1670

self.bus = bus

968

1671

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

969

970

self._approvals_pending = 0

971

1672

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

972

1673

# the D-Bus

973

client_object_name = unicode(self.name).translate(

1674

client_object_name = str(self.name).translate(

974

1675

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

975

1676

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

976

self.dbus_object_path = (dbus.ObjectPath

977

("/clients/" + client_object_name))

1677

self.dbus_object_path = dbus.ObjectPath(

1678

"/clients/" + client_object_name)

978

1679

DBusObjectWithProperties.__init__(self, self.bus,

979

1680

self.dbus_object_path)

980

981

def notifychangeproperty(transform_func,

982

dbus_name, type_func=lambda x: x,

983

variant_level=1):

1681

1682

def notifychangeproperty(transform_func, dbus_name,

1683

type_func=lambda x: x,

1684

variant_level=1,

1685

invalidate_only=False,

1686

_interface=_interface):

984

1687

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

985

1688

its changes to DBus.

986

1689

991

1694

to the D-Bus. Default: no transform

992

1695

variant_level: D-Bus variant level. Default: 1

993

1696

"""

994

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

1697

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

1698

995

1699

def setter(self, value):

996

1700

if hasattr(self, "dbus_object_path"):

997

1701

if (not hasattr(self, attrname) or

998

1702

type_func(getattr(self, attrname, None))

999

1703

!= type_func(value)):

1000

dbus_value = transform_func(type_func(value),

1001

variant_level

1002

=variant_level)

1003

self.PropertyChanged(dbus.String(dbus_name),

1004

dbus_value)

1704

if invalidate_only:

1705

self.PropertiesChanged(

1706

_interface, dbus.Dictionary(),

1707

dbus.Array((dbus_name, )))

1708

else:

1709

dbus_value = transform_func(

1710

type_func(value),

1711

variant_level = variant_level)

1712

self.PropertyChanged(dbus.String(dbus_name),

1713

dbus_value)

1714

self.PropertiesChanged(

1715

_interface,

1716

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

1717

dbus_value }),

1718

dbus.Array())

1005

1719

setattr(self, attrname, value)

1006

1720

1007

1721

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

1008

1722

1009

1010

1723

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1011

1724

approvals_pending = notifychangeproperty(dbus.Boolean,

1012

1725

"ApprovalPending",

1014

1727

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

1015

1728

last_enabled = notifychangeproperty(datetime_to_dbus,

1016

1729

"LastEnabled")

1017

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

1018

type_func = lambda checker:

1019

checker is not None)

1730

checker = notifychangeproperty(

1731

dbus.Boolean, "CheckerRunning",

1732

type_func = lambda checker: checker is not None)

1020

1733

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1021

1734

"LastCheckedOK")

1735

last_checker_status = notifychangeproperty(dbus.Int16,

1736

"LastCheckerStatus")

1022

1737

last_approval_request = notifychangeproperty(

1023

1738

datetime_to_dbus, "LastApprovalRequest")

1024

1739

approved_by_default = notifychangeproperty(dbus.Boolean,

1025

1740

"ApprovedByDefault")

1026

approval_delay = notifychangeproperty(dbus.UInt16,

1027

"ApprovalDelay",

1028

type_func =

1029

_timedelta_to_milliseconds)

1741

approval_delay = notifychangeproperty(

1742

dbus.UInt64, "ApprovalDelay",

1743

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

1030

1744

approval_duration = notifychangeproperty(

1031

dbus.UInt16, "ApprovalDuration",

1032

type_func = _timedelta_to_milliseconds)

1745

dbus.UInt64, "ApprovalDuration",

1746

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

1033

1747

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

1034

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

1035

type_func =

1036

_timedelta_to_milliseconds)

1748

timeout = notifychangeproperty(

1749

dbus.UInt64, "Timeout",

1750

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

1037

1751

extended_timeout = notifychangeproperty(

1038

dbus.UInt16, "ExtendedTimeout",

1039

type_func = _timedelta_to_milliseconds)

1040

interval = notifychangeproperty(dbus.UInt16,

1041

"Interval",

1042

type_func =

1043

_timedelta_to_milliseconds)

1752

dbus.UInt64, "ExtendedTimeout",

1753

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

1754

interval = notifychangeproperty(

1755

dbus.UInt64, "Interval",

1756

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

1044

1757

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

1758

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

1759

invalidate_only=True)

1045

1760

1046

1761

del notifychangeproperty

1047

1762

1054

1769

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

1055

1770

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

1056

1771

1057

def checker_callback(self, pid, condition, command,

1058

*args, **kwargs):

1059

self.checker_callback_tag = None

1060

self.checker = None

1061

if os.WIFEXITED(condition):

1062

exitstatus = os.WEXITSTATUS(condition)

1772

def checker_callback(self, source, condition,

1773

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

1774

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

1775

connection, command, *args,

1776

**kwargs)

1777

exitstatus = self.last_checker_status

1778

if exitstatus >= 0:

1063

1779

# Emit D-Bus signal

1064

1780

self.CheckerCompleted(dbus.Int16(exitstatus),

1065

dbus.Int64(condition),

1781

# This is specific to GNU libC

1782

dbus.Int64(exitstatus << 8),

1066

1783

dbus.String(command))

1067

1784

else:

1068

1785

# Emit D-Bus signal

1069

1786

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

1070

dbus.Int64(condition),

1787

dbus.Int64(

1788

# This is specific to GNU libC

1789

(exitstatus << 8)

1790

| self.last_checker_signal),

1071

1791

dbus.String(command))

1072

1073

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

1074

*args, **kwargs)

1792

return ret

1075

1793

1076

1794

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

1077

old_checker = self.checker

1078

if self.checker is not None:

1079

old_checker_pid = self.checker.pid

1080

else:

1081

old_checker_pid = None

1795

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

1082

1796

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

1083

1797

# Only if new checker process was started

1084

1798

if (self.checker is not None

1088

1802

return r

1089

1803

1090

1804

def _reset_approved(self):

1091

self._approved = None

1805

self.approved = None

1092

1806

return False

1093

1807

1094

1808

def approve(self, value=True):

1809

self.approved = value

1810

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

1811

* 1000), self._reset_approved)

1095

1812

self.send_changedstate()

1096

self._approved = value

1097

gobject.timeout_add(_timedelta_to_milliseconds

1098

(self.approval_duration),

1099

self._reset_approved)

1100

1101

1813

1102

1814

## D-Bus methods, signals & properties

1103

_interface = "se.recompile.Mandos.Client"

1815

1816

## Interfaces

1104

1817

1105

1818

## Signals

1106

1819

1117

1830

pass

1118

1831

1119

1832

# PropertyChanged - signal

1833

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

1120

1834

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

1121

1835

def PropertyChanged(self, property, value):

1122

1836

"D-Bus signal"

1143

1857

"D-Bus signal"

1144

1858

return self.need_approval()

1145

1859

1146

# NeRwequest - signal

1147

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

1148

def NewRequest(self, ip):

1149

"""D-Bus signal

1150

Is sent after a client request a password.

1151

"""

1152

pass

1153

1154

1860

## Methods

1155

1861

1156

1862

# Approve - method

1164

1870

self.checked_ok()

1165

1871

1166

1872

# Enable - method

1873

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

1167

1874

@dbus.service.method(_interface)

1168

1875

def Enable(self):

1169

1876

"D-Bus method"

1170

1877

self.enable()

1171

1878

1172

1879

# StartChecker - method

1880

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

1173

1881

@dbus.service.method(_interface)

1174

1882

def StartChecker(self):

1175

1883

"D-Bus method"

1176

1884

self.start_checker()

1177

1885

1178

1886

# Disable - method

1887

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

1179

1888

@dbus.service.method(_interface)

1180

1889

def Disable(self):

1181

1890

"D-Bus method"

1182

1891

self.disable()

1183

1892

1184

1893

# StopChecker - method

1894

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

1185

1895

@dbus.service.method(_interface)

1186

1896

def StopChecker(self):

1187

1897

self.stop_checker()

1194

1904

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

1195

1905

1196

1906

# ApprovedByDefault - property

1197

@dbus_service_property(_interface, signature="b",

1907

@dbus_service_property(_interface,

1908

signature="b",

1198

1909

access="readwrite")

1199

1910

def ApprovedByDefault_dbus_property(self, value=None):

1200

1911

if value is None: # get

1202

1913

self.approved_by_default = bool(value)

1203

1914

1204

1915

# ApprovalDelay - property

1205

@dbus_service_property(_interface, signature="t",

1916

@dbus_service_property(_interface,

1917

signature="t",

1206

1918

access="readwrite")

1207

1919

def ApprovalDelay_dbus_property(self, value=None):

1208

1920

if value is None: # get

1209

return dbus.UInt64(self.approval_delay_milliseconds())

1921

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

1922

* 1000)

1210

1923

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

1211

1924

1212

1925

# ApprovalDuration - property

1213

@dbus_service_property(_interface, signature="t",

1926

@dbus_service_property(_interface,

1927

signature="t",

1214

1928

access="readwrite")

1215

1929

def ApprovalDuration_dbus_property(self, value=None):

1216

1930

if value is None: # get

1217

return dbus.UInt64(_timedelta_to_milliseconds(

1218

self.approval_duration))

1931

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

1932

* 1000)

1219

1933

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

1220

1934

1221

1935

# Name - property

1936

@dbus_annotations(

1937

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

1222

1938

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

1223

1939

def Name_dbus_property(self):

1224

1940

return dbus.String(self.name)

1225

1941

1226

1942

# Fingerprint - property

1943

@dbus_annotations(

1944

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

1227

1945

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

1228

1946

def Fingerprint_dbus_property(self):

1229

1947

return dbus.String(self.fingerprint)

1230

1948

1231

1949

# Host - property

1232

@dbus_service_property(_interface, signature="s",

1950

@dbus_service_property(_interface,

1951

signature="s",

1233

1952

access="readwrite")

1234

1953

def Host_dbus_property(self, value=None):

1235

1954

if value is None: # get

1236

1955

return dbus.String(self.host)

1237

self.host = value

1956

self.host = str(value)

1238

1957

1239

1958

# Created - property

1959

@dbus_annotations(

1960

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

1240

1961

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

1241

1962

def Created_dbus_property(self):

1242

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

1963

return datetime_to_dbus(self.created)

1243

1964

1244

1965

# LastEnabled - property

1245

1966

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

1247

1968

return datetime_to_dbus(self.last_enabled)

1248

1969

1249

1970

# Enabled - property

1250

@dbus_service_property(_interface, signature="b",

1971

@dbus_service_property(_interface,

1972

signature="b",

1251

1973

access="readwrite")

1252

1974

def Enabled_dbus_property(self, value=None):

1253

1975

if value is None: # get

1258

1980

self.disable()

1259

1981

1260

1982

# LastCheckedOK - property

1261

@dbus_service_property(_interface, signature="s",

1983

@dbus_service_property(_interface,

1984

signature="s",

1262

1985

access="readwrite")

1263

1986

def LastCheckedOK_dbus_property(self, value=None):

1264

1987

if value is not None:

1266

1989

return

1267

1990

return datetime_to_dbus(self.last_checked_ok)

1268

1991

1992

# LastCheckerStatus - property

1993

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

1994

def LastCheckerStatus_dbus_property(self):

1995

return dbus.Int16(self.last_checker_status)

1996

1269

1997

# Expires - property

1270

1998

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

1271

1999

def Expires_dbus_property(self):

1277

2005

return datetime_to_dbus(self.last_approval_request)

1278

2006

1279

2007

# Timeout - property

1280

@dbus_service_property(_interface, signature="t",

2008

@dbus_service_property(_interface,

2009

signature="t",

1281

2010

access="readwrite")

1282

2011

def Timeout_dbus_property(self, value=None):

1283

2012

if value is None: # get

1284

return dbus.UInt64(self.timeout_milliseconds())

2013

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

2014

old_timeout = self.timeout

1285

2015

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

1286

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

1287

return

1288

# Reschedule timeout

1289

gobject.source_remove(self.disable_initiator_tag)

1290

self.disable_initiator_tag = None

1291

self.expires = None

1292

time_to_die = _timedelta_to_milliseconds((self

1293

.last_checked_ok

1294

+ self.timeout)

1295

- datetime.datetime

1296

.utcnow())

1297

if time_to_die <= 0:

1298

# The timeout has passed

1299

self.disable()

1300

else:

1301

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

1302

+ datetime.timedelta(milliseconds =

1303

time_to_die))

1304

self.disable_initiator_tag = (gobject.timeout_add

1305

(time_to_die, self.disable))

2016

# Reschedule disabling

2017

if self.enabled:

2018

now = datetime.datetime.utcnow()

2019

self.expires += self.timeout - old_timeout

2020

if self.expires <= now:

2021

# The timeout has passed

2022

self.disable()

2023

else:

2024

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

2025

is None):

2026

return

2027

GObject.source_remove(self.disable_initiator_tag)

2028

self.disable_initiator_tag = GObject.timeout_add(

2029

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

2030

self.disable)

1306

2031

1307

2032

# ExtendedTimeout - property

1308

@dbus_service_property(_interface, signature="t",

2033

@dbus_service_property(_interface,

2034

signature="t",

1309

2035

access="readwrite")

1310

2036

def ExtendedTimeout_dbus_property(self, value=None):

1311

2037

if value is None: # get

1312

return dbus.UInt64(self.extended_timeout_milliseconds())

2038

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

2039

* 1000)

1313

2040

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

1314

2041

1315

2042

# Interval - property

1316

@dbus_service_property(_interface, signature="t",

2043

@dbus_service_property(_interface,

2044

signature="t",

1317

2045

access="readwrite")

1318

2046

def Interval_dbus_property(self, value=None):

1319

2047

if value is None: # get

1320

return dbus.UInt64(self.interval_milliseconds())

2048

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

1321

2049

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

1322

2050

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

1323

2051

return

1324

# Reschedule checker run

1325

gobject.source_remove(self.checker_initiator_tag)

1326

self.checker_initiator_tag = (gobject.timeout_add

1327

(value, self.start_checker))

1328

self.start_checker() # Start one now, too

2052

if self.enabled:

2053

# Reschedule checker run

2054

GObject.source_remove(self.checker_initiator_tag)

2055

self.checker_initiator_tag = GObject.timeout_add(

2056

value, self.start_checker)

2057

self.start_checker() # Start one now, too

1329

2058

1330

2059

# Checker - property

1331

@dbus_service_property(_interface, signature="s",

2060

@dbus_service_property(_interface,

2061

signature="s",

1332

2062

access="readwrite")

1333

2063

def Checker_dbus_property(self, value=None):

1334

2064

if value is None: # get

1335

2065

return dbus.String(self.checker_command)

1336

self.checker_command = value

2066

self.checker_command = str(value)

1337

2067

1338

2068

# CheckerRunning - property

1339

@dbus_service_property(_interface, signature="b",

2069

@dbus_service_property(_interface,

2070

signature="b",

1340

2071

access="readwrite")

1341

2072

def CheckerRunning_dbus_property(self, value=None):

1342

2073

if value is None: # get

1347

2078

self.stop_checker()

1348

2079

1349

2080

# ObjectPath - property

2081

@dbus_annotations(

2082

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

2083

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

1350

2084

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

1351

2085

def ObjectPath_dbus_property(self):

1352

2086

return self.dbus_object_path # is already a dbus.ObjectPath

1353

2087

1354

2088

# Secret = property

1355

@dbus_service_property(_interface, signature="ay",

1356

access="write", byte_arrays=True)

2089

@dbus_annotations(

2090

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

2091

"invalidates"})

2092

@dbus_service_property(_interface,

2093

signature="ay",

2094

access="write",

2095

byte_arrays=True)

1357

2096

def Secret_dbus_property(self, value):

1358

self.secret = str(value)

2097

self.secret = bytes(value)

1359

2098

1360

2099

del _interface

1361

2100

1365

2104

self._pipe = child_pipe

1366

2105

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

1367

2106

if not self._pipe.recv():

1368

raise KeyError()

2107

raise KeyError(fpr)

1369

2108

1370

2109

def __getattribute__(self, name):

1371

if(name == '_pipe'):

2110

if name == '_pipe':

1372

2111

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

1373

2112

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

1374

2113

data = self._pipe.recv()

1375

2114

if data[0] == 'data':

1376

2115

return data[1]

1377

2116

if data[0] == 'function':

2117

1378

2118

def func(*args, **kwargs):

1379

2119

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

1380

2120

return self._pipe.recv()[1]

2121

1381

2122

return func

1382

2123

1383

2124

def __setattr__(self, name, value):

1384

if(name == '_pipe'):

2125

if name == '_pipe':

1385

2126

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

1386

2127

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

1387

2128

1388

2129

1389

class ClientDBusTransitional(ClientDBus):

1390

__metaclass__ = AlternateDBusNamesMetaclass

1391

1392

1393

2130

class ClientHandler(socketserver.BaseRequestHandler, object):

1394

2131

"""A class to handle client connections.

1395

2132

1399

2136

def handle(self):

1400

2137

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

1401

2138

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

1402

unicode(self.client_address))

2139

str(self.client_address))

1403

2140

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

1404

2141

self.server.child_pipe.fileno())

1405

2142

1406

session = (gnutls.connection

1407

.ClientSession(self.request,

1408

gnutls.connection

1409

.X509Credentials()))

1410

1411

# Note: gnutls.connection.X509Credentials is really a

1412

# generic GnuTLS certificate credentials object so long as

1413

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

1414

# here despite using OpenPGP certificates.

2143

session = gnutls.ClientSession(self.request)

1415

2144

1416

2145

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

1417

2146

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

1421

2150

priority = self.server.gnutls_priority

1422

2151

if priority is None:

1423

2152

priority = "NORMAL"

1424

(gnutls.library.functions

1425

.gnutls_priority_set_direct(session._c_object,

1426

priority, None))

2153

gnutls.priority_set_direct(session._c_object, priority,

2154

None)

1427

2155

1428

2156

# Start communication using the Mandos protocol

1429

2157

# Get protocol number

1431

2159

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

1432

2160

try:

1433

2161

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

1434

raise RuntimeError

2162

raise RuntimeError(line)

1435

2163

except (ValueError, IndexError, RuntimeError) as error:

1436

2164

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

1437

2165

return

1439

2167

# Start GnuTLS connection

1440

2168

try:

1441

2169

session.handshake()

1442

except gnutls.errors.GNUTLSError as error:

2170

except gnutls.Error as error:

1443

2171

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

1444

2172

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

1445

2173

# established. Just abandon the request.

1449

2177

approval_required = False

1450

2178

try:

1451

2179

try:

1452

fpr = self.fingerprint(self.peer_certificate

1453

(session))

1454

except (TypeError,

1455

gnutls.errors.GNUTLSError) as error:

2180

fpr = self.fingerprint(

2181

self.peer_certificate(session))

2182

except (TypeError, gnutls.Error) as error:

1456

2183

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

1457

2184

return

1458

2185

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

1459

if self.server.use_dbus:

1460

# Emit D-Bus signal

1461

client.NewRequest(str(self.client_address))

1462

2186

1463

2187

try:

1464

2188

client = ProxyClient(child_pipe, fpr,

1474

2198

while True:

1475

2199

if not client.enabled:

1476

2200

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

1477

client.name)

2201

client.name)

1478

2202

if self.server.use_dbus:

1479

2203

# Emit D-Bus signal

1480

2204

client.Rejected("Disabled")

1481

2205

return

1482

2206

1483

if client._approved or not client.approval_delay:

2207

if client.approved or not client.approval_delay:

1484

2208

#We are approved or approval is disabled

1485

2209

break

1486

elif client._approved is None:

2210

elif client.approved is None:

1487

2211

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

1488

2212

client.name)

1489

2213

if self.server.use_dbus:

1490

2214

# Emit D-Bus signal

1491

2215

client.NeedApproval(

1492

client.approval_delay_milliseconds(),

1493

client.approved_by_default)

2216

client.approval_delay.total_seconds()

2217

* 1000, client.approved_by_default)

1494

2218

else:

1495

2219

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

1496

2220

client.name)

1502

2226

#wait until timeout or approved

1503

2227

time = datetime.datetime.now()

1504

2228

client.changedstate.acquire()

1505

(client.changedstate.wait

1506

(float(client._timedelta_to_milliseconds(delay)

1507

/ 1000)))

2229

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

1508

2230

client.changedstate.release()

1509

2231

time2 = datetime.datetime.now()

1510

2232

if (time2 - time) >= delay:

1521

2243

else:

1522

2244

delay -= time2 - time

1523

2245

1524

sent_size = 0

1525

while sent_size < len(client.secret):

1526

try:

1527

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

1528

except gnutls.errors.GNUTLSError as error:

1529

logger.warning("gnutls send failed")

1530

return

1531

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

1532

sent, len(client.secret)

1533

- (sent_size + sent))

1534

sent_size += sent

2246

try:

2247

session.send(client.secret)

2248

except gnutls.Error as error:

2249

logger.warning("gnutls send failed",

2250

exc_info = error)

2251

return

1535

2252

1536

2253

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

1537

2254

# bump the timeout using extended_timeout

1538

client.checked_ok(client.extended_timeout)

2255

client.bump_timeout(client.extended_timeout)

1539

2256

if self.server.use_dbus:

1540

2257

# Emit D-Bus signal

1541

2258

client.GotSecret()

1545

2262

client.approvals_pending -= 1

1546

2263

try:

1547

2264

session.bye()

1548

except gnutls.errors.GNUTLSError as error:

1549

logger.warning("GnuTLS bye failed")

2265

except gnutls.Error as error:

2266

logger.warning("GnuTLS bye failed",

2267

exc_info=error)

1550

2268

1551

2269

@staticmethod

1552

2270

def peer_certificate(session):

1553

2271

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

1554

2272

# If not an OpenPGP certificate...

1555

if (gnutls.library.functions

1556

.gnutls_certificate_type_get(session._c_object)

1557

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1558

# ...do the normal thing

1559

return session.peer_certificate

2273

if (gnutls.certificate_type_get(session._c_object)

2274

!= gnutls.CRT_OPENPGP):

2275

# ...return invalid data

2276

return b""

1560

2277

list_size = ctypes.c_uint(1)

1561

cert_list = (gnutls.library.functions

1562

.gnutls_certificate_get_peers

2278

cert_list = (gnutls.certificate_get_peers

1563

2279

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

1564

2280

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

1565

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

1566

" certificate")

2281

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

1567

2282

if list_size.value == 0:

1568

2283

return None

1569

2284

cert = cert_list[0]

1573

2288

def fingerprint(openpgp):

1574

2289

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1575

2290

# New GnuTLS "datum" with the OpenPGP public key

1576

datum = (gnutls.library.types

1577

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

1578

ctypes.POINTER

1579

(ctypes.c_ubyte)),

1580

ctypes.c_uint(len(openpgp))))

2291

datum = gnutls.datum_t(

2292

ctypes.cast(ctypes.c_char_p(openpgp),

2293

ctypes.POINTER(ctypes.c_ubyte)),

2294

ctypes.c_uint(len(openpgp)))

1581

2295

# New empty GnuTLS certificate

1582

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1583

(gnutls.library.functions

1584

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2296

crt = gnutls.openpgp_crt_t()

2297

gnutls.openpgp_crt_init(ctypes.byref(crt))

1585

2298

# Import the OpenPGP public key into the certificate

1586

(gnutls.library.functions

1587

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

1588

gnutls.library.constants

1589

.GNUTLS_OPENPGP_FMT_RAW))

2299

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

2300

gnutls.OPENPGP_FMT_RAW)

1590

2301

# Verify the self signature in the key

1591

2302

crtverify = ctypes.c_uint()

1592

(gnutls.library.functions

1593

.gnutls_openpgp_crt_verify_self(crt, 0,

1594

ctypes.byref(crtverify)))

2303

gnutls.openpgp_crt_verify_self(crt, 0,

2304

ctypes.byref(crtverify))

1595

2305

if crtverify.value != 0:

1596

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1597

raise (gnutls.errors.CertificateSecurityError

1598

("Verify failed"))

2306

gnutls.openpgp_crt_deinit(crt)

2307

raise gnutls.CertificateSecurityError("Verify failed")

1599

2308

# New buffer for the fingerprint

1600

2309

buf = ctypes.create_string_buffer(20)

1601

2310

buf_len = ctypes.c_size_t()

1602

2311

# Get the fingerprint from the certificate into the buffer

1603

(gnutls.library.functions

1604

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

1605

ctypes.byref(buf_len)))

2312

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

2313

ctypes.byref(buf_len))

1606

2314

# Deinit the certificate

1607

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2315

gnutls.openpgp_crt_deinit(crt)

1608

2316

# Convert the buffer to a Python bytestring

1609

2317

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

1610

2318

# Convert the bytestring to hexadecimal notation

1611

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

2319

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

1612

2320

return hex_fpr

1613

2321

1614

2322

1615

2323

class MultiprocessingMixIn(object):

1616

2324

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

2325

1617

2326

def sub_process_main(self, request, address):

1618

2327

try:

1619

2328

self.finish_request(request, address)

1620

except:

2329

except Exception:

1621

2330

self.handle_error(request, address)

1622

2331

self.close_request(request)

1623

2332

1624

2333

def process_request(self, request, address):

1625

2334

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

1626

2335

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

1627

args = (request,

1628

address))

2336

args = (request, address))

1629

2337

proc.start()

1630

2338

return proc

1631

2339

1632

2340

1633

2341

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1634

2342

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

2343

1635

2344

def process_request(self, request, client_address):

1636

2345

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

1637

2346

1646

2355

1647

2356

def add_pipe(self, parent_pipe, proc):

1648

2357

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

1649

raise NotImplementedError

2358

raise NotImplementedError()

1650

2359

1651

2360

1652

2361

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1658

2367

interface: None or a network interface name (string)

1659

2368

use_ipv6: Boolean; to use IPv6 or not

1660

2369

"""

2370

1661

2371

def __init__(self, server_address, RequestHandlerClass,

1662

interface=None, use_ipv6=True):

2372

interface=None,

2373

use_ipv6=True,

2374

socketfd=None):

2375

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

2376

creating a new one with socket.socket().

2377

"""

1663

2378

self.interface = interface

1664

2379

if use_ipv6:

1665

2380

self.address_family = socket.AF_INET6

2381

if socketfd is not None:

2382

# Save the file descriptor

2383

self.socketfd = socketfd

2384

# Save the original socket.socket() function

2385

self.socket_socket = socket.socket

2386

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

2387

#

2388

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

2389

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

2390

# patching socket.socket.)

2391

#

2392

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

2393

@functools.wraps(socket.socket)

2394

def socket_wrapper(*args, **kwargs):

2395

# Restore original function so subsequent calls are

2396

# not affected.

2397

socket.socket = self.socket_socket

2398

del self.socket_socket

2399

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

2400

# saved file descriptor.

2401

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

2402

# Replace socket.socket() function with wrapper

2403

socket.socket = socket_wrapper

2404

# The socketserver.TCPServer.__init__ will call

2405

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

2406

# socket_wrapper(), if socketfd was set.

1666

2407

socketserver.TCPServer.__init__(self, server_address,

1667

2408

RequestHandlerClass)

2409

1668

2410

def server_bind(self):

1669

2411

"""This overrides the normal server_bind() function

1670

2412

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

1676

2418

self.interface)

1677

2419

else:

1678

2420

try:

1679

self.socket.setsockopt(socket.SOL_SOCKET,

1680

SO_BINDTODEVICE,

1681

str(self.interface

1682

+ '\0'))

2421

self.socket.setsockopt(

2422

socket.SOL_SOCKET, SO_BINDTODEVICE,

2423

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

1683

2424

except socket.error as error:

1684

if error[0] == errno.EPERM:

1685

logger.error("No permission to"

1686

" bind to interface %s",

1687

self.interface)

1688

elif error[0] == errno.ENOPROTOOPT:

2425

if error.errno == errno.EPERM:

2426

logger.error("No permission to bind to"

2427

" interface %s", self.interface)

2428

elif error.errno == errno.ENOPROTOOPT:

1689

2429

logger.error("SO_BINDTODEVICE not available;"

1690

2430

" cannot bind to interface %s",

1691

2431

self.interface)

2432

elif error.errno == errno.ENODEV:

2433

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

2434

" cannot bind", self.interface)

1692

2435

else:

1693

2436

raise

1694

2437

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

1697

2440

if self.address_family == socket.AF_INET6:

1698

2441

any_address = "::" # in6addr_any

1699

2442

else:

1700

any_address = socket.INADDR_ANY

2443

any_address = "0.0.0.0" # INADDR_ANY

1701

2444

self.server_address = (any_address,

1702

2445

self.server_address[1])

1703

2446

elif not self.server_address[1]:

1704

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

1705

0)

2447

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

1706

2448

# if self.interface:

1707

2449

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

1708

2450

# 0, # port

1720

2462

gnutls_priority GnuTLS priority string

1721

2463

use_dbus: Boolean; to emit D-Bus signals or not

1722

2464

1723

Assumes a gobject.MainLoop event loop.

2465

Assumes a GObject.MainLoop event loop.

1724

2466

"""

2467

1725

2468

def __init__(self, server_address, RequestHandlerClass,

1726

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

1727

gnutls_priority=None, use_dbus=True):

2469

interface=None,

2470

use_ipv6=True,

2471

clients=None,

2472

gnutls_priority=None,

2473

use_dbus=True,

2474

socketfd=None):

1728

2475

self.enabled = False

1729

2476

self.clients = clients

1730

2477

if self.clients is None:

1734

2481

IPv6_TCPServer.__init__(self, server_address,

1735

2482

RequestHandlerClass,

1736

2483

interface = interface,

1737

use_ipv6 = use_ipv6)

2484

use_ipv6 = use_ipv6,

2485

socketfd = socketfd)

2486

1738

2487

def server_activate(self):

1739

2488

if self.enabled:

1740

2489

return socketserver.TCPServer.server_activate(self)

1744

2493

1745

2494

def add_pipe(self, parent_pipe, proc):

1746

2495

# Call "handle_ipc" for both data and EOF events

1747

gobject.io_add_watch(parent_pipe.fileno(),

1748

gobject.IO_IN | gobject.IO_HUP,

1749

functools.partial(self.handle_ipc,

1750

parent_pipe =

1751

parent_pipe,

1752

proc = proc))

2496

GObject.io_add_watch(

2497

parent_pipe.fileno(),

2498

GObject.IO_IN | GObject.IO_HUP,

2499

functools.partial(self.handle_ipc,

2500

parent_pipe = parent_pipe,

2501

proc = proc))

1753

2502

1754

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

1755

proc = None, client_object=None):

1756

condition_names = {

1757

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

1758

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

1759

# blocking).

1760

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

1761

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

1762

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

1763

# broken, usually for pipes and

1764

# sockets).

1765

}

1766

conditions_string = ' | '.join(name

1767

for cond, name in

1768

condition_names.iteritems()

1769

if cond & condition)

2503

def handle_ipc(self, source, condition,

2504

parent_pipe=None,

2505

proc = None,

2506

client_object=None):

1770

2507

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

1771

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

2508

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

1772

2509

# Wait for other process to exit

1773

2510

proc.join()

1774

2511

return False

1795

2532

parent_pipe.send(False)

1796

2533

return False

1797

2534

1798

gobject.io_add_watch(parent_pipe.fileno(),

1799

gobject.IO_IN | gobject.IO_HUP,

1800

functools.partial(self.handle_ipc,

1801

parent_pipe =

1802

parent_pipe,

1803

proc = proc,

1804

client_object =

1805

client))

2535

GObject.io_add_watch(

2536

parent_pipe.fileno(),

2537

GObject.IO_IN | GObject.IO_HUP,

2538

functools.partial(self.handle_ipc,

2539

parent_pipe = parent_pipe,

2540

proc = proc,

2541

client_object = client))

1806

2542

parent_pipe.send(True)

1807

2543

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

1808

2544

# same fileno

1814

2550

1815

2551

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

1816

2552

funcname)(*args,

1817

**kwargs)))

2553

**kwargs)))

1818

2554

1819

2555

if command == 'getattr':

1820

2556

attrname = request[1]

1821

if callable(client_object.__getattribute__(attrname)):

1822

parent_pipe.send(('function',))

2557

if isinstance(client_object.__getattribute__(attrname),

2558

collections.Callable):

2559

parent_pipe.send(('function', ))

1823

2560

else:

1824

parent_pipe.send(('data', client_object

1825

.__getattribute__(attrname)))

2561

parent_pipe.send((

2562

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

1826

2563

1827

2564

if command == 'setattr':

1828

2565

attrname = request[1]

1832

2569

return True

1833

2570

1834

2571

2572

def rfc3339_duration_to_delta(duration):

2573

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

2574

2575

>>> rfc3339_duration_to_delta("P7D")

2576

datetime.timedelta(7)

2577

>>> rfc3339_duration_to_delta("PT60S")

2578

datetime.timedelta(0, 60)

2579

>>> rfc3339_duration_to_delta("PT60M")

2580

datetime.timedelta(0, 3600)

2581

>>> rfc3339_duration_to_delta("PT24H")

2582

datetime.timedelta(1)

2583

>>> rfc3339_duration_to_delta("P1W")

2584

datetime.timedelta(7)

2585

>>> rfc3339_duration_to_delta("PT5M30S")

2586

datetime.timedelta(0, 330)

2587

>>> rfc3339_duration_to_delta("P1DT3M20S")

2588

datetime.timedelta(1, 200)

2589

"""

2590

2591

# Parsing an RFC 3339 duration with regular expressions is not

2592

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

2593

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

2594

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

2595

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

2596

# avoid excessive use of external libraries.

2597

2598

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

2599

Token = collections.namedtuple("Token", (

2600

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

2601

# a "group" containing digits

2602

"value", # datetime.timedelta or None

2603

"followers")) # Tokens valid after this token

2604

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

2605

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

2606

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

2607

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

2608

datetime.timedelta(seconds=1),

2609

frozenset((token_end, )))

2610

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

2611

datetime.timedelta(minutes=1),

2612

frozenset((token_second, token_end)))

2613

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

2614

datetime.timedelta(hours=1),

2615

frozenset((token_minute, token_end)))

2616

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

2617

None,

2618

frozenset((token_hour, token_minute,

2619

token_second)))

2620

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

2621

datetime.timedelta(days=1),

2622

frozenset((token_time, token_end)))

2623

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

2624

datetime.timedelta(weeks=4),

2625

frozenset((token_day, token_end)))

2626

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

2627

datetime.timedelta(weeks=52),

2628

frozenset((token_month, token_end)))

2629

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

2630

datetime.timedelta(weeks=1),

2631

frozenset((token_end, )))

2632

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

2633

frozenset((token_year, token_month,

2634

token_day, token_time,

2635

token_week)))

2636

# Define starting values

2637

value = datetime.timedelta() # Value so far

2638

found_token = None

2639

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

2640

s = duration # String left to parse

2641

# Loop until end token is found

2642

while found_token is not token_end:

2643

# Search for any currently valid tokens

2644

for token in followers:

2645

match = token.regexp.match(s)

2646

if match is not None:

2647

# Token found

2648

if token.value is not None:

2649

# Value found, parse digits

2650

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

2651

# Add to value so far

2652

value += factor * token.value

2653

# Strip token from string

2654

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

2655

# Go to found token

2656

found_token = token

2657

# Set valid next tokens

2658

followers = found_token.followers

2659

break

2660

else:

2661

# No currently valid tokens were found

2662

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

2663

.format(duration))

2664

# End token found

2665

return value

2666

2667

1835

2668

def string_to_delta(interval):

1836

2669

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

1837

2670

1848

2681

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

1849

2682

datetime.timedelta(0, 330)

1850

2683

"""

2684

2685

try:

2686

return rfc3339_duration_to_delta(interval)

2687

except ValueError:

2688

pass

2689

1851

2690

timevalue = datetime.timedelta(0)

1852

2691

for s in interval.split():

1853

2692

try:

1854

suffix = unicode(s[-1])

2693

suffix = s[-1]

1855

2694

value = int(s[:-1])

1856

2695

if suffix == "d":

1857

2696

delta = datetime.timedelta(value)

1864

2703

elif suffix == "w":

1865

2704

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

1866

2705

else:

1867

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

1868

except (ValueError, IndexError) as e:

2706

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

2707

except IndexError as e:

1869

2708

raise ValueError(*(e.args))

1870

2709

timevalue += delta

1871

2710

return timevalue

1884

2723

sys.exit()

1885

2724

if not noclose:

1886

2725

# Close all standard open file descriptors

1887

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

2726

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

1888

2727

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

1889

2728

raise OSError(errno.ENODEV,

1890

"%s not a character device"

1891

% os.path.devnull)

2729

"{} not a character device"

2730

.format(os.devnull))

1892

2731

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

1893

2732

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

1894

2733

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

1903

2742

1904

2743

parser = argparse.ArgumentParser()

1905

2744

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

1906

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

2745

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

1907

2746

help="show version number and exit")

1908

2747

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

1909

2748

help="Bind to interface IF")

1915

2754

help="Run self-test")

1916

2755

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

1917

2756

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

1918

" to terminal")

2757

" to terminal", default=None)

1919

2758

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

1920

2759

help="Debug level for stdout output")

1921

2760

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

1928

2767

" files")

1929

2768

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

1930

2769

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

1931

" system bus interface")

2770

" system bus interface", default=None)

1932

2771

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

1933

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

2772

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

2773

default=None)

1934

2774

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

1935

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

1936

default=True)

2775

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

2776

" state", default=None)

2777

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

2778

help="Specify a file descriptor to a network"

2779

" socket to use instead of creating one")

2780

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

2781

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

2782

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

2783

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

2784

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

2785

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

2786

default=None)

1937

2787

1938

2788

options = parser.parse_args()

1939

2789

1940

2790

if options.check:

1941

2791

import doctest

1942

doctest.testmod()

1943

sys.exit()

2792

fail_count, test_count = doctest.testmod()

2793

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

1944

2794

1945

2795

# Default values for config file for server-global settings

1946

2796

server_defaults = { "interface": "",

1948

2798

"port": "",

1949

2799

"debug": "False",

1950

2800

"priority":

1951

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

2801

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

2802

":+SIGN-DSA-SHA256",

1952

2803

"servicename": "Mandos",

1953

2804

"use_dbus": "True",

1954

2805

"use_ipv6": "True",

1955

2806

"debuglevel": "",

1956

}

2807

"restore": "True",

2808

"socket": "",

2809

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

2810

"foreground": "False",

2811

"zeroconf": "True",

2812

}

1957

2813

1958

2814

# Parse config file for server-global settings

1959

2815

server_config = configparser.SafeConfigParser(server_defaults)

1960

2816

del server_defaults

1961

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

1962

"mandos.conf"))

2817

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

1963

2818

# Convert the SafeConfigParser object to a dict

1964

2819

server_settings = server_config.defaults()

1965

2820

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

1966

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

2821

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

1967

2822

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

1968

2823

option)

1969

2824

if server_settings["port"]:

1970

2825

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

1971

2826

"port")

2827

if server_settings["socket"]:

2828

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

2829

"socket")

2830

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

2831

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

2832

# happen with a supplied network socket.

2833

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

2834

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

2835

["socket"])

1972

2836

del server_config

1973

2837

1974

2838

# Override the settings from the config file with command line

1975

2839

# options, if set.

1976

2840

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

1977

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

1978

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

2841

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

2842

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

2843

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

1979

2844

value = getattr(options, option)

1980

2845

if value is not None:

1981

2846

server_settings[option] = value

1982

2847

del options

1983

2848

# Force all strings to be unicode

1984

2849

for option in server_settings.keys():

1985

if type(server_settings[option]) is str:

1986

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

2850

if isinstance(server_settings[option], bytes):

2851

server_settings[option] = (server_settings[option]

2852

.decode("utf-8"))

2853

# Force all boolean options to be boolean

2854

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

2855

"foreground", "zeroconf"):

2856

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

2857

# Debug implies foreground

2858

if server_settings["debug"]:

2859

server_settings["foreground"] = True

1987

2860

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

1988

2861

1989

2862

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

1990

2863

2864

if (not server_settings["zeroconf"]

2865

and not (server_settings["port"]

2866

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

2867

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

2868

1991

2869

# For convenience

1992

2870

debug = server_settings["debug"]

1993

2871

debuglevel = server_settings["debuglevel"]

1994

2872

use_dbus = server_settings["use_dbus"]

1995

2873

use_ipv6 = server_settings["use_ipv6"]

2874

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

2875

stored_state_file)

2876

foreground = server_settings["foreground"]

2877

zeroconf = server_settings["zeroconf"]

1996

2878

1997

2879

if debug:

1998

initlogger(logging.DEBUG)

2880

initlogger(debug, logging.DEBUG)

1999

2881

else:

2000

2882

if not debuglevel:

2001

initlogger()

2883

initlogger(debug)

2002

2884

else:

2003

2885

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

2004

initlogger(level)

2886

initlogger(debug, level)

2005

2887

2006

2888

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

2007

syslogger.setFormatter(logging.Formatter

2008

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

2009

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

2010

% server_settings["servicename"]))

2889

syslogger.setFormatter(

2890

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

2891

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

2892

server_settings["servicename"])))

2011

2893

2012

2894

# Parse config file with clients

2013

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

2014

"extended_timeout": "15m",

2015

"interval": "2m",

2016

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

2017

"host": "",

2018

"approval_delay": "0s",

2019

"approval_duration": "1s",

2020

}

2021

client_config = configparser.SafeConfigParser(client_defaults)

2895

client_config = configparser.SafeConfigParser(Client

2896

.client_defaults)

2022

2897

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

2023

2898

"clients.conf"))

2024

2899

2025

2900

global mandos_dbus_service

2026

2901

mandos_dbus_service = None

2027

2902

2028

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

2029

server_settings["port"]),

2030

ClientHandler,

2031

interface=(server_settings["interface"]

2032

or None),

2033

use_ipv6=use_ipv6,

2034

gnutls_priority=

2035

server_settings["priority"],

2036

use_dbus=use_dbus)

2037

if not debug:

2038

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

2903

socketfd = None

2904

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

2905

socketfd = server_settings["socket"]

2906

tcp_server = MandosServer(

2907

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

2908

ClientHandler,

2909

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

2910

use_ipv6=use_ipv6,

2911

gnutls_priority=server_settings["priority"],

2912

use_dbus=use_dbus,

2913

socketfd=socketfd)

2914

if not foreground:

2915

pidfilename = "/run/mandos.pid"

2916

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

2917

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

2918

pidfile = None

2039

2919

try:

2040

pidfile = open(pidfilename, "w")

2041

except IOError:

2042

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

2920

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

2921

except IOError as e:

2922

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

2923

exc_info=e)

2043

2924

2044

try:

2045

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

2046

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

2047

except KeyError:

2925

for name, group in (("_mandos", "_mandos"),

2926

("mandos", "mandos"),

2927

("nobody", "nogroup")):

2048

2928

try:

2049

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

2050

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

2929

uid = pwd.getpwnam(name).pw_uid

2930

gid = pwd.getpwnam(group).pw_gid

2931

break

2051

2932

except KeyError:

2052

try:

2053

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

2054

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

2055

except KeyError:

2056

uid = 65534

2057

gid = 65534

2933

continue

2934

else:

2935

uid = 65534

2936

gid = 65534

2058

2937

try:

2059

2938

os.setgid(gid)

2060

2939

os.setuid(uid)

2061

2940

except OSError as error:

2062

if error[0] != errno.EPERM:

2063

raise error

2941

if error.errno != errno.EPERM:

2942

raise

2064

2943

2065

2944

if debug:

2066

2945

# Enable all possible GnuTLS debugging

2067

2946

2068

2947

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

2069

2948

# - GnuTLS manual

2070

gnutls.library.functions.gnutls_global_set_log_level(11)

2949

gnutls.global_set_log_level(11)

2071

2950

2072

@gnutls.library.types.gnutls_log_func

2951

@gnutls.log_func

2073

2952

def debug_gnutls(level, string):

2074

2953

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

2075

2954

2076

(gnutls.library.functions

2077

.gnutls_global_set_log_function(debug_gnutls))

2955

gnutls.global_set_log_function(debug_gnutls)

2078

2956

2079

2957

# Redirect stdin so all checkers get /dev/null

2080

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

2958

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

2081

2959

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

2082

2960

if null > 2:

2083

2961

os.close(null)

2084

else:

2085

# No console logging

2086

logger.removeHandler(console)

2087

2962

2088

2963

# Need to fork before connecting to D-Bus

2089

if not debug:

2964

if not foreground:

2090

2965

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

2091

2966

daemon()

2092

2967

2968

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

2969

# need to inform GObject that threads will be used.

2970

GObject.threads_init()

2971

2093

2972

global main_loop

2094

2973

# From the Avahi example code

2095

DBusGMainLoop(set_as_default=True )

2096

main_loop = gobject.MainLoop()

2974

DBusGMainLoop(set_as_default=True)

2975

main_loop = GObject.MainLoop()

2097

2976

bus = dbus.SystemBus()

2098

2977

# End of Avahi example code

2099

2978

if use_dbus:

2100

2979

try:

2101

2980

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

2102

bus, do_not_queue=True)

2103

old_bus_name = (dbus.service.BusName

2104

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

2105

do_not_queue=True))

2106

except dbus.exceptions.NameExistsException as e:

2107

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

2981

bus,

2982

do_not_queue=True)

2983

old_bus_name = dbus.service.BusName(

2984

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

2985

do_not_queue=True)

2986

except dbus.exceptions.DBusException as e:

2987

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

2108

2988

use_dbus = False

2109

2989

server_settings["use_dbus"] = False

2110

2990

tcp_server.use_dbus = False

2111

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2112

service = AvahiServiceToSyslog(name =

2113

server_settings["servicename"],

2114

servicetype = "_mandos._tcp",

2115

protocol = protocol, bus = bus)

2116

if server_settings["interface"]:

2117

service.interface = (if_nametoindex

2118

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

2991

if zeroconf:

2992

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2993

service = AvahiServiceToSyslog(

2994

name = server_settings["servicename"],

2995

servicetype = "_mandos._tcp",

2996

protocol = protocol,

2997

bus = bus)

2998

if server_settings["interface"]:

2999

service.interface = if_nametoindex(

3000

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

2119

3001

2120

3002

global multiprocessing_manager

2121

3003

multiprocessing_manager = multiprocessing.Manager()

2122

3004

2123

3005

client_class = Client

2124

3006

if use_dbus:

2125

client_class = functools.partial(ClientDBusTransitional,

2126

bus = bus)

2127

2128

special_settings = {

2129

# Some settings need to be accessd by special methods;

2130

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

2131

"approved_by_default":

2132

lambda section:

2133

client_config.getboolean(section, "approved_by_default"),

2134

}

2135

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

2136

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

2137

# with exceptions for any special settings as defined above

2138

client_settings = dict((clientname,

2139

dict((setting,

2140

(value if setting not in special_settings

2141

else special_settings[setting](clientname)))

2142

for setting, value in client_config.items(clientname)))

2143

for clientname in client_config.sections())

2144

3007

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

3008

3009

client_settings = Client.config_parser(client_config)

2145

3010

old_client_settings = {}

2146

clients_data = []

2147

2148

# Get client data and settings from last running state.

3011

clients_data = {}

3012

3013

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

3014

global wnull

3015

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

3016

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

3017

# mode

3018

if debug or not foreground:

3019

wnull.close()

3020

3021

# Get client data and settings from last running state.

2149

3022

if server_settings["restore"]:

2150

3023

try:

2151

3024

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

2152

clients_data, old_client_settings = pickle.load(stored_state)

3025

clients_data, old_client_settings = pickle.load(

3026

stored_state)

2153

3027

os.remove(stored_state_path)

2154

3028

except IOError as e:

2155

logger.warning("Could not load persistant state: {0}".format(e))

2156

if e.errno != errno.ENOENT:

3029

if e.errno == errno.ENOENT:

3030

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

3031

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

3032

else:

3033

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

3034

exc_info=e)

2157

3035

raise

3036

except EOFError as e:

3037

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

3038

"EOFError:",

3039

exc_info=e)

2158

3040

2159

for client in clients_data:

2160

client_name = client["name"]

2161

2162

# Decide which value to use after restoring saved state.

2163

# We have three different values: Old config file,

2164

# new config file, and saved state.

2165

# New config value takes precedence if it differs from old

2166

# config value, otherwise use saved state.

2167

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

3041

with PGPEngine() as pgp:

3042

for client_name, client in clients_data.items():

3043

# Skip removed clients

3044

if client_name not in client_settings:

3045

continue

3046

3047

# Decide which value to use after restoring saved state.

3048

# We have three different values: Old config file,

3049

# new config file, and saved state.

3050

# New config value takes precedence if it differs from old

3051

# config value, otherwise use saved state.

3052

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

3053

try:

3054

# For each value in new config, check if it

3055

# differs from the old config value (Except for

3056

# the "secret" attribute)

3057

if (name != "secret"

3058

and (value !=

3059

old_client_settings[client_name][name])):

3060

client[name] = value

3061

except KeyError:

3062

pass

3063

3064

# Clients who has passed its expire date can still be

3065

# enabled if its last checker was successful. A Client

3066

# whose checker succeeded before we stored its state is

3067

# assumed to have successfully run all checkers during

3068

# downtime.

3069

if client["enabled"]:

3070

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

3071

if not client["last_checked_ok"]:

3072

logger.warning(

3073

"disabling client {} - Client never "

3074

"performed a successful checker".format(

3075

client_name))

3076

client["enabled"] = False

3077

elif client["last_checker_status"] != 0:

3078

logger.warning(

3079

"disabling client {} - Client last"

3080

" checker failed with error code"

3081

" {}".format(

3082

client_name,

3083

client["last_checker_status"]))

3084

client["enabled"] = False

3085

else:

3086

client["expires"] = (

3087

datetime.datetime.utcnow()

3088

+ client["timeout"])

3089

logger.debug("Last checker succeeded,"

3090

" keeping {} enabled".format(

3091

client_name))

2168

3092

try:

2169

# For each value in new config, check if it differs

2170

# from the old config value (Except for the "secret"

2171

# attribute)

2172

if name != "secret" and value != old_client_settings[client_name][name]:

2173

setattr(client, name, value)

2174

except KeyError:

2175

pass

2176

2177

# Clients who has passed its expire date, can still be enabled if its

2178

# last checker was sucessful. Clients who checkers failed before we

2179

# stored it state is asumed to had failed checker during downtime.

2180

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

2181

if ((datetime.datetime.utcnow() - client["last_checked_ok"])

2182

> client["interval"]):

2183

if client["last_checker_status"] != 0:

2184

client["enabled"] = False

2185

else:

2186

client["expires"] = datetime.datetime.utcnow() + client["timeout"]

2187

2188

client["changedstate"] = (multiprocessing_manager

2189

.Condition(multiprocessing_manager

2190

.Lock()))

2191

if use_dbus:

2192

new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)

2193

tcp_server.clients[client_name] = new_client

2194

new_client.bus = bus

2195

for name, value in client.iteritems():

2196

setattr(new_client, name, value)

2197

client_object_name = unicode(client_name).translate(

2198

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

2199

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

2200

new_client.dbus_object_path = (dbus.ObjectPath

2201

("/clients/" + client_object_name))

2202

DBusObjectWithProperties.__init__(new_client,

2203

new_client.bus,

2204

new_client.dbus_object_path)

2205

else:

2206

tcp_server.clients[client_name] = Client.__new__(Client)

2207

for name, value in client.iteritems():

2208

setattr(tcp_server.clients[client_name], name, value)

2209

2210

tcp_server.clients[client_name].decrypt_secret(

2211

client_settings[client_name]["secret"])

2212

2213

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

2214

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

2215

del tcp_server.clients[clientname]

2216

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

2217

tcp_server.clients[clientname] = (client_class(name = clientname,

2218

config =

2219

client_settings

2220

[clientname]))

2221

3093

client["secret"] = pgp.decrypt(

3094

client["encrypted_secret"],

3095

client_settings[client_name]["secret"])

3096

except PGPError:

3097

# If decryption fails, we use secret from new settings

3098

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

3099

client_name))

3100

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

3101

["secret"])

3102

3103

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

3104

for client_name in (set(old_client_settings)

3105

- set(client_settings)):

3106

del clients_data[client_name]

3107

for client_name in (set(client_settings)

3108

- set(old_client_settings)):

3109

clients_data[client_name] = client_settings[client_name]

3110

3111

# Create all client objects

3112

for client_name, client in clients_data.items():

3113

tcp_server.clients[client_name] = client_class(

3114

name = client_name,

3115

settings = client,

3116

server_settings = server_settings)

2222

3117

2223

3118

if not tcp_server.clients:

2224

3119

logger.warning("No clients defined")

2225

2226

if not debug:

2227

try:

2228

with pidfile:

2229

pid = os.getpid()

2230

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

2231

del pidfile

2232

except IOError:

2233

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

2234

pidfilename, pid)

2235

except NameError:

2236

# "pidfile" was never created

2237

pass

3120

3121

if not foreground:

3122

if pidfile is not None:

3123

pid = os.getpid()

3124

try:

3125

with pidfile:

3126

print(pid, file=pidfile)

3127

except IOError:

3128

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

3129

pidfilename, pid)

3130

del pidfile

2238

3131

del pidfilename

2239

2240

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

2241

3132

2242

3133

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

2243

3134

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

2244

3135

2245

3136

if use_dbus:

2246

class MandosDBusService(dbus.service.Object):

3137

3138

@alternate_dbus_interfaces(

3139

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

3140

class MandosDBusService(DBusObjectWithObjectManager):

2247

3141

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

3142

2248

3143

def __init__(self):

2249

3144

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

3145

2250

3146

_interface = "se.recompile.Mandos"

2251

3147

2252

3148

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

2259

3155

"D-Bus signal"

2260

3156

pass

2261

3157

3158

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

3159

"true"})

2262

3160

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

2263

3161

def ClientRemoved(self, objpath, name):

2264

3162

"D-Bus signal"

2265

3163

pass

2266

3164

3165

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

3166

"true"})

2267

3167

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

2268

3168

def GetAllClients(self):

2269

3169

"D-Bus method"

2270

return dbus.Array(c.dbus_object_path

2271

for c in

3170

return dbus.Array(c.dbus_object_path for c in

2272

3171

tcp_server.clients.itervalues())

2273

3172

3173

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

3174

"true"})

2274

3175

@dbus.service.method(_interface,

2275

3176

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

2276

3177

def GetAllClientsWithProperties(self):

2277

3178

"D-Bus method"

2278

3179

return dbus.Dictionary(

2279

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

2280

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

3180

{ c.dbus_object_path: c.GetAll(

3181

"se.recompile.Mandos.Client")

3182

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

2281

3183

signature="oa{sv}")

2282

3184

2283

3185

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

2287

3189

if c.dbus_object_path == object_path:

2288

3190

del tcp_server.clients[c.name]

2289

3191

c.remove_from_connection()

2290

# Don't signal anything except ClientRemoved

3192

# Don't signal the disabling

2291

3193

c.disable(quiet=True)

2292

# Emit D-Bus signal

2293

self.ClientRemoved(object_path, c.name)

3194

# Emit D-Bus signal for removal

3195

self.client_removed_signal(c)

2294

3196

return

2295

3197

raise KeyError(object_path)

2296

3198

2297

3199

del _interface

3200

3201

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3202

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

3203

def GetManagedObjects(self):

3204

"""D-Bus method"""

3205

return dbus.Dictionary(

3206

{ client.dbus_object_path:

3207

dbus.Dictionary(

3208

{ interface: client.GetAll(interface)

3209

for interface in

3210

client._get_all_interface_names()})

3211

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

3212

3213

def client_added_signal(self, client):

3214

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

3215

if use_dbus:

3216

# New standard signal

3217

self.InterfacesAdded(

3218

client.dbus_object_path,

3219

dbus.Dictionary(

3220

{ interface: client.GetAll(interface)

3221

for interface in

3222

client._get_all_interface_names()}))

3223

# Old signal

3224

self.ClientAdded(client.dbus_object_path)

3225

3226

def client_removed_signal(self, client):

3227

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

3228

if use_dbus:

3229

# New standard signal

3230

self.InterfacesRemoved(

3231

client.dbus_object_path,

3232

client._get_all_interface_names())

3233

# Old signal

3234

self.ClientRemoved(client.dbus_object_path,

3235

client.name)

2298

3236

2299

class MandosDBusServiceTransitional(MandosDBusService):

2300

__metaclass__ = AlternateDBusNamesMetaclass

2301

mandos_dbus_service = MandosDBusServiceTransitional()

3237

mandos_dbus_service = MandosDBusService()

2302

3238

2303

3239

def cleanup():

2304

3240

"Cleanup function; run on exit"

2305

service.cleanup()

3241

if zeroconf:

3242

service.cleanup()

2306

3243

2307

3244

multiprocessing.active_children()

3245

wnull.close()

2308

3246

if not (tcp_server.clients or client_settings):

2309

3247

return

2310

3248

2311

# Store client before exiting. Secrets are encrypted with key based

2312

# on what config file has. If config file is removed/edited, old

2313

# secret will thus be unrecovable.

2314

clients = []

2315

for client in tcp_server.clients.itervalues():

2316

client.encrypt_secret(client_settings[client.name]["secret"])

2317

2318

client_dict = {}

2319

2320

# A list of attributes that will not be stored when shuting down.

2321

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

2322

for name, typ in inspect.getmembers(dbus.service.Object):

2323

exclude.add(name)

2324

2325

client_dict["encrypted_secret"] = client.encrypted_secret

2326

for attr in client.client_structure:

2327

if attr not in exclude:

2328

client_dict[attr] = getattr(client, attr)

2329

2330

clients.append(client_dict)

2331

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

2332

3249

# Store client before exiting. Secrets are encrypted with key

3250

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

3251

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

3252

clients = {}

3253

with PGPEngine() as pgp:

3254

for client in tcp_server.clients.itervalues():

3255

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

3256

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

3257

key)

3258

client_dict = {}

3259

3260

# A list of attributes that can not be pickled

3261

# + secret.

3262

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

3263

"checker", "server_settings" }

3264

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

3265

.Object):

3266

exclude.add(name)

3267

3268

client_dict["encrypted_secret"] = (client

3269

.encrypted_secret)

3270

for attr in client.client_structure:

3271

if attr not in exclude:

3272

client_dict[attr] = getattr(client, attr)

3273

3274

clients[client.name] = client_dict

3275

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

3276

2333

3277

try:

2334

with os.fdopen(os.open(stored_state_path, os.O_CREAT|os.O_WRONLY|os.O_TRUNC, 0600), "wb") as stored_state:

3278

with tempfile.NamedTemporaryFile(

3279

mode='wb',

3280

suffix=".pickle",

3281

prefix='clients-',

3282

dir=os.path.dirname(stored_state_path),

3283

delete=False) as stored_state:

2335

3284

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

2336

except IOError as e:

2337

logger.warning("Could not save persistant state: {0}".format(e))

2338

if e.errno != errno.ENOENT:

3285

tempname = stored_state.name

3286

os.rename(tempname, stored_state_path)

3287

except (IOError, OSError) as e:

3288

if not debug:

3289

try:

3290

os.remove(tempname)

3291

except NameError:

3292

pass

3293

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

3294

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

3295

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

3296

else:

3297

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

3298

exc_info=e)

2339

3299

raise

2340

3300

2341

3301

# Delete all clients, and settings from config

2343

3303

name, client = tcp_server.clients.popitem()

2344

3304

if use_dbus:

2345

3305

client.remove_from_connection()

2346

# Don't signal anything except ClientRemoved

3306

# Don't signal the disabling

2347

3307

client.disable(quiet=True)

3308

# Emit D-Bus signal for removal

2348

3309

if use_dbus:

2349

# Emit D-Bus signal

2350

mandos_dbus_service.ClientRemoved(client

2351

.dbus_object_path,

2352

client.name)

3310

mandos_dbus_service.client_removed_signal(client)

2353

3311

client_settings.clear()

2354

3312

2355

3313

atexit.register(cleanup)

2356

3314

2357

3315

for client in tcp_server.clients.itervalues():

2358

3316

if use_dbus:

2359

# Emit D-Bus signal

2360

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3317

# Emit D-Bus signal for adding

3318

mandos_dbus_service.client_added_signal(client)

2361

3319

# Need to initiate checking of clients

2362

3320

if client.enabled:

2363

3321

client.init_checker()

2364

2365

3322

2366

3323

tcp_server.enable()

2367

3324

tcp_server.server_activate()

2368

3325

2369

3326

# Find out what port we got

2370

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

3327

if zeroconf:

3328

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

2371

3329

if use_ipv6:

2372

3330

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

2373

" flowinfo %d, scope_id %d"

2374

% tcp_server.socket.getsockname())

3331

" flowinfo %d, scope_id %d",

3332

*tcp_server.socket.getsockname())

2375

3333

else: # IPv4

2376

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

2377

% tcp_server.socket.getsockname())

3334

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

3335

*tcp_server.socket.getsockname())

2378

3336

2379

3337

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

2380

3338

2381

3339

try:

2382

# From the Avahi example code

2383

try:

2384

service.activate()

2385

except dbus.exceptions.DBusException as error:

2386

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

2387

cleanup()

2388

sys.exit(1)

2389

# End of Avahi example code

3340

if zeroconf:

3341

# From the Avahi example code

3342

try:

3343

service.activate()

3344

except dbus.exceptions.DBusException as error:

3345

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

3346

cleanup()

3347

sys.exit(1)

3348

# End of Avahi example code

2390

3349

2391

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

3350

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

2392

3351

lambda *args, **kwargs:

2393

3352

(tcp_server.handle_request

2394

3353

(*args[2:], **kwargs) or True))

2396

3355

logger.debug("Starting main loop")

2397

3356

main_loop.run()

2398

3357

except AvahiError as error:

2399

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

3358

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

2400

3359

cleanup()

2401

3360

sys.exit(1)

2402

3361

except KeyboardInterrupt: