/mandos/trunk : revision 518.2.3

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

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#

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# Everything else is

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#

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

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

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import SocketServer as socketserver

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import socket

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import argparse

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import datetime

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import errno

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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 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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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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try:

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from gi.repository import GObject

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except ImportError:

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import gobject as GObject

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import gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.3"

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version = "1.4.1"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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

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def initlogger(level=logging.WARNING):

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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class CryptoError(Exception):

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pass

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class PGPEngine(object):

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class Crypto(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.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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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet'])

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def __enter__(self):

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return self

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

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

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self._cleanup()

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return False

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def password_encode(self, password):

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen([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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self.gnupg.passphrase = self.password_encode(password)

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with open(os.devnull) as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise CryptoError(e)

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self.gnupg.passphrase = None

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen([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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self.gnupg.passphrase = self.password_encode(password)

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with open(os.devnull) as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise CryptoError(e)

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self.gnupg.passphrase = None

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return decrypted_plaintext

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class AvahiError(Exception):

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

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self.value = value

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

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**kwargs)

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

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def __unicode__(self):

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return unicode(repr(self.value))

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self, remove=True):

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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self.name)

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if remove:

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self.remove()

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

321

if (error.get_dbus_name()

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

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

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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

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self.cleanup()

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os._exit(1)

280

self.rename_count += 1

330

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def remove(self):

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

332

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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

335

286

if self.group is not None:

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self.group.Reset()

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338

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def add(self):

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

340

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self.remove()

357

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dbus.UInt16(self.port),

358

308

avahi.string_array_to_txt_array(self.TXT))

359

309

self.group.Commit()

360

361

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def entry_group_state_changed(self, state, error):

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

363

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

369

318

self.rename()

370

319

elif state == avahi.ENTRY_GROUP_FAILURE:

371

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

372

str(error))

373

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

374

321

unicode(error))

322

raise AvahiGroupError("State changed: %s"

323

% unicode(error))

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def cleanup(self):

376

325

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

377

326

if self.group is not None:

382

331

pass

383

332

self.group = None

384

333

self.remove()

385

386

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

387

335

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

388

336

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

389

bad_states = {

390

avahi.SERVER_INVALID: "Zeroconf server invalid",

391

avahi.SERVER_REGISTERING: None,

392

avahi.SERVER_COLLISION: "Zeroconf server name collision",

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avahi.SERVER_FAILURE: "Zeroconf server failure",

394

}

337

bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

340

avahi.SERVER_COLLISION:

341

"Zeroconf server name collision",

342

avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

395

344

if state in bad_states:

396

345

if bad_states[state] is not None:

397

346

if error is None:

400

349

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

401

350

self.cleanup()

402

351

elif state == avahi.SERVER_RUNNING:

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)

352

self.add()

415

353

else:

416

354

if error is None:

417

355

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

418

356

else:

419

357

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

420

421

358

def activate(self):

422

359

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

423

360

if self.server is None:

427

364

follow_name_owner_changes=True),

428

365

avahi.DBUS_INTERFACE_SERVER)

429

366

self.server.connect_to_signal("StateChanged",

430

self.server_state_changed)

367

self.server_state_changed)

431

368

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

432

369

433

434

370

class AvahiServiceToSyslog(AvahiService):

435

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

371

def rename(self):

436

372

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

437

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

438

syslogger.setFormatter(logging.Formatter(

439

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

440

.format(self.name)))

373

ret = AvahiService.rename(self)

374

syslogger.setFormatter(logging.Formatter

375

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

376

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

377

% self.name))

441

378

return ret

442

379

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

380

def _timedelta_to_milliseconds(td):

381

"Convert a datetime.timedelta() to milliseconds"

382

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

383

+ (td.seconds * 1000)

384

+ (td.microseconds // 1000))

385

708

386

class Client(object):

709

387

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

710

388

711

389

Attributes:

712

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

390

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

713

391

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

714

392

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

715

393

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

716

394

to see if the client lives.

717

395

'None' if no process is running.

718

checker_callback_tag: a GObject event source tag, or None

396

checker_callback_tag: a gobject event source tag, or None

719

397

checker_command: string; External command which is run to check

720

398

if client lives. %() expansions are done at

721

399

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

722

400

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

723

checker_initiator_tag: a GObject event source tag, or None

401

checker_initiator_tag: a gobject event source tag, or None

724

402

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

725

403

client_structure: Object describing what attributes a client has

726

404

and is used for storing the client at exit

727

405

current_checker_command: string; current running checker_command

728

disable_initiator_tag: a GObject event source tag, or None

406

disable_initiator_tag: a gobject event source tag, or None

729

407

enabled: bool()

730

408

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

731

409

uniquely identify the client

733

411

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

734

412

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

735

413

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

414

736

415

last_checker_status: integer between 0 and 255 reflecting exit

737

416

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

417

checker, or None.

741

418

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

742

419

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

743

420

D-Bus identifiers

744

421

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

745

422

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

746

423

until this client is disabled

747

extended_timeout: extra long timeout when secret has been sent

424

extended_timeout: extra long timeout when password has been sent

748

425

runtime_expansions: Allowed attributes for runtime expansion.

749

426

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

750

427

disabled, or None

751

server_settings: The server_settings dict from main()

752

428

"""

753

429

754

430

runtime_expansions = ("approval_delay", "approval_duration",

755

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

756

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

757

"last_approval_request", "last_checked_ok",

431

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

432

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

758

433

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

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):

434

435

def timeout_milliseconds(self):

436

"Return the 'timeout' attribute in milliseconds"

437

return _timedelta_to_milliseconds(self.timeout)

438

439

def extended_timeout_milliseconds(self):

440

"Return the 'extended_timeout' attribute in milliseconds"

441

return _timedelta_to_milliseconds(self.extended_timeout)

442

443

def interval_milliseconds(self):

444

"Return the 'interval' attribute in milliseconds"

445

return _timedelta_to_milliseconds(self.interval)

446

447

def approval_delay_milliseconds(self):

448

return _timedelta_to_milliseconds(self.approval_delay)

449

450

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

451

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

452

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

453

attribute."""

822

454

self.name = name

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

455

if config is None:

456

config = {}

840

457

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

458

# Uppercase and remove spaces from fingerprint for later

459

# comparison purposes with return value from the fingerprint()

460

# function

461

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

462

.replace(" ", ""))

841

463

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

842

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

843

datetime.datetime.utcnow())

844

845

# attributes specific for this server instance

464

if "secret" in config:

465

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

466

elif "secfile" in config:

467

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

468

(config["secfile"])),

469

"rb") as secfile:

470

self.secret = secfile.read()

471

else:

472

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

473

% self.name)

474

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

475

self.created = datetime.datetime.utcnow()

476

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

477

self.last_approval_request = None

478

if self.enabled:

479

self.last_enabled = datetime.datetime.utcnow()

480

else:

481

self.last_enabled = None

482

self.last_checked_ok = None

483

self.last_checker_status = None

484

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

485

self.extended_timeout = string_to_delta(config

486

["extended_timeout"])

487

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

846

488

self.checker = None

847

489

self.checker_initiator_tag = None

848

490

self.disable_initiator_tag = None

491

if self.enabled:

492

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

493

else:

494

self.expires = None

849

495

self.checker_callback_tag = None

496

self.checker_command = config["checker"]

850

497

self.current_checker_command = None

851

self.approved = None

498

self._approved = None

499

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

500

True)

852

501

self.approvals_pending = 0

853

self.changedstate = multiprocessing_manager.Condition(

854

multiprocessing_manager.Lock())

855

self.client_structure = [attr

856

for attr in self.__dict__.iterkeys()

502

self.approval_delay = string_to_delta(

503

config["approval_delay"])

504

self.approval_duration = string_to_delta(

505

config["approval_duration"])

506

self.changedstate = (multiprocessing_manager

507

.Condition(multiprocessing_manager

508

.Lock()))

509

self.client_structure = [attr for attr in

510

self.__dict__.iterkeys()

857

511

if not attr.startswith("_")]

858

512

self.client_structure.append("client_structure")

859

513

860

for name, t in inspect.getmembers(

861

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

514

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

515

lambda obj:

516

isinstance(obj,

517

property)):

862

518

if not name.startswith("_"):

863

519

self.client_structure.append(name)

864

520

872

528

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

873

529

# Already enabled

874

530

return

531

self.send_changedstate()

875

532

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

876

533

self.enabled = True

877

534

self.last_enabled = datetime.datetime.utcnow()

878

535

self.init_checker()

879

self.send_changedstate()

880

536

881

537

def disable(self, quiet=True):

882

538

"""Disable this client."""

883

539

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

884

540

return False

885

541

if not quiet:

542

self.send_changedstate()

543

if not quiet:

886

544

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

887

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

888

GObject.source_remove(self.disable_initiator_tag)

545

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

546

gobject.source_remove(self.disable_initiator_tag)

889

547

self.disable_initiator_tag = None

890

548

self.expires = None

891

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

892

GObject.source_remove(self.checker_initiator_tag)

549

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

550

gobject.source_remove(self.checker_initiator_tag)

893

551

self.checker_initiator_tag = None

894

552

self.stop_checker()

895

553

self.enabled = False

896

if not quiet:

897

self.send_changedstate()

898

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

554

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

899

555

return False

900

556

901

557

def __del__(self):

904

560

def init_checker(self):

905

561

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

906

562

# and every interval from then on.

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)

563

self.checker_initiator_tag = (gobject.timeout_add

564

(self.interval_milliseconds(),

565

self.start_checker))

912

566

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

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)

567

self.disable_initiator_tag = (gobject.timeout_add

568

(self.timeout_milliseconds(),

569

self.disable))

917

570

# Also start a new checker *right now*.

918

571

self.start_checker()

919

572

920

def checker_callback(self, source, condition, connection,

921

command):

573

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

922

574

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

923

575

self.checker_callback_tag = None

924

576

self.checker = None

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

577

if os.WIFEXITED(condition):

578

self.last_checker_status = os.WEXITSTATUS(condition)

932

579

if self.last_checker_status == 0:

933

580

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

934

581

vars(self))

935

582

self.checked_ok()

936

583

else:

937

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

584

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

585

vars(self))

938

586

else:

939

587

self.last_checker_status = -1

940

self.last_checker_signal = -returncode

941

588

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

942

589

vars(self))

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."""

590

591

def checked_ok(self, timeout=None):

592

"""Bump up the timeout for this client.

593

594

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

595

alive and well.

596

"""

954

597

if timeout is None:

955

598

timeout = self.timeout

599

self.last_checked_ok = datetime.datetime.utcnow()

956

600

if self.disable_initiator_tag is not None:

957

GObject.source_remove(self.disable_initiator_tag)

958

self.disable_initiator_tag = None

601

gobject.source_remove(self.disable_initiator_tag)

959

602

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

960

self.disable_initiator_tag = GObject.timeout_add(

961

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

603

self.disable_initiator_tag = (gobject.timeout_add

604

(_timedelta_to_milliseconds

605

(timeout), self.disable))

962

606

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

963

607

964

608

def need_approval(self):

970

614

If a checker already exists, leave it running and do

971

615

nothing."""

972

616

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

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

617

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

618

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

619

# client would inevitably timeout, since no checker would get

620

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

977

621

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

978

622

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

979

623

# should be.

980

624

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

625

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

626

try:

627

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

628

except (AttributeError, OSError) as error:

629

if (isinstance(error, OSError)

630

and error.errno != errno.ECHILD):

631

raise error

632

else:

633

if pid:

634

logger.warning("Checker was a zombie")

635

gobject.source_remove(self.checker_callback_tag)

636

self.checker_callback(pid, status,

637

self.current_checker_command)

985

638

# Start a new checker if needed

986

639

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 }

991

640

try:

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

641

# In case checker_command has exactly one % operator

642

command = self.checker_command % self.host

643

except TypeError:

644

# Escape attributes for the shell

645

escaped_attrs = dict(

646

(attr,

647

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

648

errors=

649

'replace')))

650

for attr in

651

self.runtime_expansions)

652

653

try:

654

command = self.checker_command % escaped_attrs

655

except TypeError as error:

656

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

657

' %s', self.checker_command, error)

658

return True # Try again later

998

659

self.current_checker_command = command

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

660

try:

661

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

662

command, self.name)

663

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

664

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

665

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

666

# always replaced by /dev/null.)

667

self.checker = subprocess.Popen(command,

668

close_fds=True,

669

shell=True, cwd="/")

670

self.checker_callback_tag = (gobject.child_watch_add

671

(self.checker.pid,

672

self.checker_callback,

673

data=command))

674

# The checker may have completed before the gobject

675

# watch was added. Check for this.

676

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

677

if pid:

678

gobject.source_remove(self.checker_callback_tag)

679

self.checker_callback(pid, status, command)

680

except OSError as error:

681

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

682

error)

683

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

1025

684

return True

1026

685

1027

686

def stop_checker(self):

1028

687

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

1029

688

if self.checker_callback_tag:

1030

GObject.source_remove(self.checker_callback_tag)

689

gobject.source_remove(self.checker_callback_tag)

1031

690

self.checker_callback_tag = None

1032

691

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

1033

692

return

1034

693

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

1035

self.checker.terminate()

694

try:

695

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

696

#time.sleep(0.5)

697

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

698

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

699

except OSError as error:

700

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

701

raise

1036

702

self.checker = None

1037

703

1038

704

1039

def dbus_service_property(dbus_interface,

1040

signature="v",

1041

access="readwrite",

1042

byte_arrays=False):

705

def dbus_service_property(dbus_interface, signature="v",

706

access="readwrite", byte_arrays=False):

1043

707

"""Decorators for marking methods of a DBusObjectWithProperties to

1044

708

become properties on the D-Bus.

1045

709

1054

718

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

1055

719

if byte_arrays and signature != "ay":

1056

720

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

1057

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

1058

721

" signature %r" % signature)

1059

722

def decorator(func):

1060

723

func._dbus_is_property = True

1061

724

func._dbus_interface = dbus_interface

1066

729

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

1067

730

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1068

731

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

1113

732

return decorator

1114

733

1115

734

1116

735

class DBusPropertyException(dbus.exceptions.DBusException):

1117

736

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

1118

737

"""

1119

pass

738

def __unicode__(self):

739

return unicode(str(self))

1120

740

1121

741

1122

742

class DBusPropertyAccessException(DBusPropertyException):

1131

751

pass

1132

752

1133

753

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):

754

class DBusObjectWithProperties(dbus.service.Object):

1224

755

"""A D-Bus object with properties.

1225

756

1226

757

Classes inheriting from this can use the dbus_service_property

1228

759

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

1229

760

"""

1230

761

762

@staticmethod

763

def _is_dbus_property(obj):

764

return getattr(obj, "_dbus_is_property", False)

765

766

def _get_all_dbus_properties(self):

767

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

768

"""

769

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

770

for cls in self.__class__.__mro__

771

for name, prop in

772

inspect.getmembers(cls, self._is_dbus_property))

773

1231

774

def _get_dbus_property(self, interface_name, property_name):

1232

775

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

1233

776

property with the specified name and interface.

1234

777

"""

1235

for cls in self.__class__.__mro__:

1236

for name, value in inspect.getmembers(

1237

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

778

for cls in self.__class__.__mro__:

779

for name, value in (inspect.getmembers

780

(cls, self._is_dbus_property)):

1238

781

if (value._dbus_name == property_name

1239

782

and value._dbus_interface == interface_name):

1240

783

return value.__get__(self)

1241

784

1242

785

# No such property

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",

786

raise DBusPropertyNotFound(self.dbus_object_path + ":"

787

+ interface_name + "."

788

+ property_name)

789

790

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

1257

791

out_signature="v")

1258

792

def Get(self, interface_name, property_name):

1259

793

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

1277

811

# The byte_arrays option is not supported yet on

1278

812

# signatures other than "ay".

1279

813

if prop._dbus_signature != "ay":

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))

814

raise ValueError

815

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

816

for byte in value))

1285

817

prop(value)

1286

818

1287

@dbus.service.method(dbus.PROPERTIES_IFACE,

1288

in_signature="s",

819

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

1289

820

out_signature="a{sv}")

1290

821

def GetAll(self, interface_name):

1291

822

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

1294

825

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

1295

826

"""

1296

827

properties = {}

1297

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

828

for name, prop in self._get_all_dbus_properties():

1298

829

if (interface_name

1299

830

and interface_name != prop._dbus_interface):

1300

831

# Interface non-empty but did not match

1306

837

if not hasattr(value, "variant_level"):

1307

838

properties[name] = value

1308

839

continue

1309

properties[name] = type(value)(

1310

value, variant_level = value.variant_level + 1)

840

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

841

value.variant_level+1)

1311

842

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

1312

843

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

1321

844

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1322

845

out_signature="s",

1323

846

path_keyword='object_path',

1324

847

connection_keyword='connection')

1325

848

def Introspect(self, object_path, connection):

1326

"""Overloading of standard D-Bus method.

1327

1328

Inserts property tags and interface annotation tags.

849

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

1329

850

"""

1330

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1331

object_path,

1332

connection)

851

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

852

connection)

1333

853

try:

1334

854

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

1335

1336

855

def make_tag(document, name, prop):

1337

856

e = document.createElement("property")

1338

857

e.setAttribute("name", name)

1339

858

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

1340

859

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

1341

860

return e

1342

1343

861

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

1344

# Add property tags

1345

862

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

1346

863

for name, prop

1347

in self._get_all_dbus_things("property")

864

in self._get_all_dbus_properties()

1348

865

if prop._dbus_interface

1349

866

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

1350

867

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)

1367

868

# Add the names to the return values for the

1368

869

# "org.freedesktop.DBus.Properties" methods

1369

870

if (if_tag.getAttribute("name")

1384

885

except (AttributeError, xml.dom.DOMException,

1385

886

xml.parsers.expat.ExpatError) as error:

1386

887

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

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):

888

error)

889

return xmlstring

890

891

892

def datetime_to_dbus (dt, variant_level=0):

1460

893

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

1461

894

if dt is None:

1462

895

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

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).

896

return dbus.String(dt.isoformat(),

897

variant_level=variant_level)

898

899

900

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

901

.__metaclass__):

902

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

903

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

1488

904

"""

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):

905

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

906

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

907

# methods, signals, or properties in them

908

for base in (b for b in bases

909

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

910

# Go though all attributes of the base class

911

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

1497

912

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

1498

913

# with the wrong interface name

1499

914

if (not hasattr(attribute, "_dbus_interface")

1500

or not attribute._dbus_interface.startswith(

1501

orig_interface_name)):

915

or not attribute._dbus_interface

916

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

1502

917

continue

1503

918

# Create an alternate D-Bus interface name based on

1504

919

# the current name

1505

alt_interface = attribute._dbus_interface.replace(

1506

orig_interface_name, alt_interface_name)

1507

interface_names.add(alt_interface)

920

alt_interface = (attribute._dbus_interface

921

.replace("se.recompile.Mandos",

922

"se.bsnet.fukt.Mandos"))

1508

923

# Is this a D-Bus signal?

1509

924

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

1510

if sys.version_info.major == 2:

1511

# Extract the original non-method undecorated

1512

# function by black magic

1513

nonmethod_func = (dict(

925

# Extract the original non-method function by

926

# black magic

927

nonmethod_func = (dict(

1514

928

zip(attribute.func_code.co_freevars,

1515

attribute.__closure__))

1516

["func"].cell_contents)

1517

else:

1518

nonmethod_func = attribute

929

attribute.__closure__))["func"]

930

.cell_contents)

1519

931

# Create a new, but exactly alike, function

1520

932

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

1521

933

# with the alternate D-Bus interface name

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

934

new_function = (dbus.service.signal

935

(alt_interface,

936

attribute._dbus_signature)

937

(types.FunctionType(

938

nonmethod_func.func_code,

939

nonmethod_func.func_globals,

940

nonmethod_func.func_name,

941

nonmethod_func.func_defaults,

942

nonmethod_func.func_closure)))

1545

943

# Define a creator of a function to call both the

1546

# original and alternate functions, so both the

1547

# original and alternate signals gets sent when

1548

# the function is called

944

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

945

# signals gets sent when the function is called

1549

946

def fixscope(func1, func2):

1550

947

"""This function is a scope container to pass

1551

948

func1 and func2 to the "call_both" function

1552

949

outside of its arguments"""

1553

1554

@functools.wraps(func2)

1555

950

def call_both(*args, **kwargs):

1556

951

"""This function will emit two D-Bus

1557

952

signals by calling func1 and func2"""

1558

953

func1(*args, **kwargs)

1559

954

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

1565

955

return call_both

1566

956

# Create the "call_both" function and add it to

1567

957

# the class

1568

attr[attrname] = fixscope(attribute, new_function)

958

attr[attrname] = fixscope(attribute,

959

new_function)

1569

960

# Is this a D-Bus method?

1570

961

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

1571

962

# Create a new, but exactly alike, function

1572

963

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

1573

964

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

1574

965

# to the class.

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

966

attr[attrname] = (dbus.service.method

967

(alt_interface,

968

attribute._dbus_in_signature,

969

attribute._dbus_out_signature)

970

(types.FunctionType

971

(attribute.func_code,

972

attribute.func_globals,

973

attribute.func_name,

974

attribute.func_defaults,

975

attribute.func_closure)))

1591

976

# Is this a D-Bus property?

1592

977

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

1593

978

# Create a new, but exactly alike, function

1594

979

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

1595

980

# property with the alternate D-Bus interface

1596

981

# name. Add it to the class.

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"})

982

attr[attrname] = (dbus_service_property

983

(alt_interface,

984

attribute._dbus_signature,

985

attribute._dbus_access,

986

attribute

987

._dbus_get_args_options

988

["byte_arrays"])

989

(types.FunctionType

990

(attribute.func_code,

991

attribute.func_globals,

992

attribute.func_name,

993

attribute.func_defaults,

994

attribute.func_closure)))

995

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

996

997

1654

998

class ClientDBus(Client, DBusObjectWithProperties):

1655

999

"""A Client class using D-Bus

1656

1000

1660

1004

"""

1661

1005

1662

1006

runtime_expansions = (Client.runtime_expansions

1663

+ ("dbus_object_path", ))

1664

1665

_interface = "se.recompile.Mandos.Client"

1007

+ ("dbus_object_path",))

1666

1008

1667

1009

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

1668

1010

1669

1011

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

1670

1012

self.bus = bus

1671

1013

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

1014

1015

self._approvals_pending = 0

1672

1016

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

1673

1017

# the D-Bus

1674

client_object_name = str(self.name).translate(

1018

client_object_name = unicode(self.name).translate(

1675

1019

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

1676

1020

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

1677

self.dbus_object_path = dbus.ObjectPath(

1678

"/clients/" + client_object_name)

1021

self.dbus_object_path = (dbus.ObjectPath

1022

("/clients/" + client_object_name))

1679

1023

DBusObjectWithProperties.__init__(self, self.bus,

1680

1024

self.dbus_object_path)

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):

1025

1026

def notifychangeproperty(transform_func,

1027

dbus_name, type_func=lambda x: x,

1028

variant_level=1):

1687

1029

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

1688

1030

its changes to DBus.

1689

1031

1694

1036

to the D-Bus. Default: no transform

1695

1037

variant_level: D-Bus variant level. Default: 1

1696

1038

"""

1697

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

1698

1039

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

1699

1040

def setter(self, value):

1700

1041

if hasattr(self, "dbus_object_path"):

1701

1042

if (not hasattr(self, attrname) or

1702

1043

type_func(getattr(self, attrname, None))

1703

1044

!= type_func(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())

1045

dbus_value = transform_func(type_func(value),

1046

variant_level

1047

=variant_level)

1048

self.PropertyChanged(dbus.String(dbus_name),

1049

dbus_value)

1719

1050

setattr(self, attrname, value)

1720

1051

1721

1052

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

1722

1053

1054

1723

1055

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1724

1056

approvals_pending = notifychangeproperty(dbus.Boolean,

1725

1057

"ApprovalPending",

1727

1059

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

1728

1060

last_enabled = notifychangeproperty(datetime_to_dbus,

1729

1061

"LastEnabled")

1730

checker = notifychangeproperty(

1731

dbus.Boolean, "CheckerRunning",

1732

type_func = lambda checker: checker is not None)

1062

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

1063

type_func = lambda checker:

1064

checker is not None)

1733

1065

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1734

1066

"LastCheckedOK")

1735

last_checker_status = notifychangeproperty(dbus.Int16,

1736

"LastCheckerStatus")

1737

1067

last_approval_request = notifychangeproperty(

1738

1068

datetime_to_dbus, "LastApprovalRequest")

1739

1069

approved_by_default = notifychangeproperty(dbus.Boolean,

1740

1070

"ApprovedByDefault")

1741

approval_delay = notifychangeproperty(

1742

dbus.UInt64, "ApprovalDelay",

1743

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

1071

approval_delay = notifychangeproperty(dbus.UInt16,

1072

"ApprovalDelay",

1073

type_func =

1074

_timedelta_to_milliseconds)

1744

1075

approval_duration = notifychangeproperty(

1745

dbus.UInt64, "ApprovalDuration",

1746

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

1076

dbus.UInt16, "ApprovalDuration",

1077

type_func = _timedelta_to_milliseconds)

1747

1078

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

1748

timeout = notifychangeproperty(

1749

dbus.UInt64, "Timeout",

1750

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

1079

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

1080

type_func =

1081

_timedelta_to_milliseconds)

1751

1082

extended_timeout = notifychangeproperty(

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)

1083

dbus.UInt16, "ExtendedTimeout",

1084

type_func = _timedelta_to_milliseconds)

1085

interval = notifychangeproperty(dbus.UInt16,

1086

"Interval",

1087

type_func =

1088

_timedelta_to_milliseconds)

1757

1089

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

1758

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

1759

invalidate_only=True)

1760

1090

1761

1091

del notifychangeproperty

1762

1092

1769

1099

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

1770

1100

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

1771

1101

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:

1102

def checker_callback(self, pid, condition, command,

1103

*args, **kwargs):

1104

self.checker_callback_tag = None

1105

self.checker = None

1106

if os.WIFEXITED(condition):

1107

exitstatus = os.WEXITSTATUS(condition)

1779

1108

# Emit D-Bus signal

1780

1109

self.CheckerCompleted(dbus.Int16(exitstatus),

1781

# This is specific to GNU libC

1782

dbus.Int64(exitstatus << 8),

1110

dbus.Int64(condition),

1783

1111

dbus.String(command))

1784

1112

else:

1785

1113

# Emit D-Bus signal

1786

1114

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

1787

dbus.Int64(

1788

# This is specific to GNU libC

1789

(exitstatus << 8)

1790

| self.last_checker_signal),

1115

dbus.Int64(condition),

1791

1116

dbus.String(command))

1792

return ret

1117

1118

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

1119

*args, **kwargs)

1793

1120

1794

1121

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

1795

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

1122

old_checker = self.checker

1123

if self.checker is not None:

1124

old_checker_pid = self.checker.pid

1125

else:

1126

old_checker_pid = None

1796

1127

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

1797

1128

# Only if new checker process was started

1798

1129

if (self.checker is not None

1802

1133

return r

1803

1134

1804

1135

def _reset_approved(self):

1805

self.approved = None

1136

self._approved = None

1806

1137

return False

1807

1138

1808

1139

def approve(self, value=True):

1809

self.approved = value

1810

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

1811

* 1000), self._reset_approved)

1812

1140

self.send_changedstate()

1141

self._approved = value

1142

gobject.timeout_add(_timedelta_to_milliseconds

1143

(self.approval_duration),

1144

self._reset_approved)

1145

1813

1146

1814

1147

## D-Bus methods, signals & properties

1815

1816

## Interfaces

1148

_interface = "se.recompile.Mandos.Client"

1817

1149

1818

1150

## Signals

1819

1151

1830

1162

pass

1831

1163

1832

1164

# PropertyChanged - signal

1833

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

1834

1165

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

1835

1166

def PropertyChanged(self, property, value):

1836

1167

"D-Bus signal"

1857

1188

"D-Bus signal"

1858

1189

return self.need_approval()

1859

1190

1191

# NeRwequest - signal

1192

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

1193

def NewRequest(self, ip):

1194

"""D-Bus signal

1195

Is sent after a client request a password.

1196

"""

1197

pass

1198

1860

1199

## Methods

1861

1200

1862

1201

# Approve - method

1870

1209

self.checked_ok()

1871

1210

1872

1211

# Enable - method

1873

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

1874

1212

@dbus.service.method(_interface)

1875

1213

def Enable(self):

1876

1214

"D-Bus method"

1877

1215

self.enable()

1878

1216

1879

1217

# StartChecker - method

1880

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

1881

1218

@dbus.service.method(_interface)

1882

1219

def StartChecker(self):

1883

1220

"D-Bus method"

1884

1221

self.start_checker()

1885

1222

1886

1223

# Disable - method

1887

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

1888

1224

@dbus.service.method(_interface)

1889

1225

def Disable(self):

1890

1226

"D-Bus method"

1891

1227

self.disable()

1892

1228

1893

1229

# StopChecker - method

1894

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

1895

1230

@dbus.service.method(_interface)

1896

1231

def StopChecker(self):

1897

1232

self.stop_checker()

1904

1239

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

1905

1240

1906

1241

# ApprovedByDefault - property

1907

@dbus_service_property(_interface,

1908

signature="b",

1242

@dbus_service_property(_interface, signature="b",

1909

1243

access="readwrite")

1910

1244

def ApprovedByDefault_dbus_property(self, value=None):

1911

1245

if value is None: # get

1913

1247

self.approved_by_default = bool(value)

1914

1248

1915

1249

# ApprovalDelay - property

1916

@dbus_service_property(_interface,

1917

signature="t",

1250

@dbus_service_property(_interface, signature="t",

1918

1251

access="readwrite")

1919

1252

def ApprovalDelay_dbus_property(self, value=None):

1920

1253

if value is None: # get

1921

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

1922

* 1000)

1254

return dbus.UInt64(self.approval_delay_milliseconds())

1923

1255

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

1924

1256

1925

1257

# ApprovalDuration - property

1926

@dbus_service_property(_interface,

1927

signature="t",

1258

@dbus_service_property(_interface, signature="t",

1928

1259

access="readwrite")

1929

1260

def ApprovalDuration_dbus_property(self, value=None):

1930

1261

if value is None: # get

1931

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

1932

* 1000)

1262

return dbus.UInt64(_timedelta_to_milliseconds(

1263

self.approval_duration))

1933

1264

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

1934

1265

1935

1266

# Name - property

1936

@dbus_annotations(

1937

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

1938

1267

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

1939

1268

def Name_dbus_property(self):

1940

1269

return dbus.String(self.name)

1941

1270

1942

1271

# Fingerprint - property

1943

@dbus_annotations(

1944

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

1945

1272

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

1946

1273

def Fingerprint_dbus_property(self):

1947

1274

return dbus.String(self.fingerprint)

1948

1275

1949

1276

# Host - property

1950

@dbus_service_property(_interface,

1951

signature="s",

1277

@dbus_service_property(_interface, signature="s",

1952

1278

access="readwrite")

1953

1279

def Host_dbus_property(self, value=None):

1954

1280

if value is None: # get

1955

1281

return dbus.String(self.host)

1956

self.host = str(value)

1282

self.host = value

1957

1283

1958

1284

# Created - property

1959

@dbus_annotations(

1960

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

1961

1285

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

1962

1286

def Created_dbus_property(self):

1963

1287

return datetime_to_dbus(self.created)

1968

1292

return datetime_to_dbus(self.last_enabled)

1969

1293

1970

1294

# Enabled - property

1971

@dbus_service_property(_interface,

1972

signature="b",

1295

@dbus_service_property(_interface, signature="b",

1973

1296

access="readwrite")

1974

1297

def Enabled_dbus_property(self, value=None):

1975

1298

if value is None: # get

1980

1303

self.disable()

1981

1304

1982

1305

# LastCheckedOK - property

1983

@dbus_service_property(_interface,

1984

signature="s",

1306

@dbus_service_property(_interface, signature="s",

1985

1307

access="readwrite")

1986

1308

def LastCheckedOK_dbus_property(self, value=None):

1987

1309

if value is not None:

1989

1311

return

1990

1312

return datetime_to_dbus(self.last_checked_ok)

1991

1313

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

1997

1314

# Expires - property

1998

1315

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

1999

1316

def Expires_dbus_property(self):

2005

1322

return datetime_to_dbus(self.last_approval_request)

2006

1323

2007

1324

# Timeout - property

2008

@dbus_service_property(_interface,

2009

signature="t",

1325

@dbus_service_property(_interface, signature="t",

2010

1326

access="readwrite")

2011

1327

def Timeout_dbus_property(self, value=None):

2012

1328

if value is None: # get

2013

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

2014

old_timeout = self.timeout

1329

return dbus.UInt64(self.timeout_milliseconds())

2015

1330

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

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)

1331

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

1332

return

1333

# Reschedule timeout

1334

gobject.source_remove(self.disable_initiator_tag)

1335

self.disable_initiator_tag = None

1336

self.expires = None

1337

time_to_die = _timedelta_to_milliseconds((self

1338

.last_checked_ok

1339

+ self.timeout)

1340

- datetime.datetime

1341

.utcnow())

1342

if time_to_die <= 0:

1343

# The timeout has passed

1344

self.disable()

1345

else:

1346

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

1347

+ datetime.timedelta(milliseconds =

1348

time_to_die))

1349

self.disable_initiator_tag = (gobject.timeout_add

1350

(time_to_die, self.disable))

2031

1351

2032

1352

# ExtendedTimeout - property

2033

@dbus_service_property(_interface,

2034

signature="t",

1353

@dbus_service_property(_interface, signature="t",

2035

1354

access="readwrite")

2036

1355

def ExtendedTimeout_dbus_property(self, value=None):

2037

1356

if value is None: # get

2038

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

2039

* 1000)

1357

return dbus.UInt64(self.extended_timeout_milliseconds())

2040

1358

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

2041

1359

2042

1360

# Interval - property

2043

@dbus_service_property(_interface,

2044

signature="t",

1361

@dbus_service_property(_interface, signature="t",

2045

1362

access="readwrite")

2046

1363

def Interval_dbus_property(self, value=None):

2047

1364

if value is None: # get

2048

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

1365

return dbus.UInt64(self.interval_milliseconds())

2049

1366

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

2050

1367

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

2051

1368

return

2052

1369

if self.enabled:

2053

1370

# 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

1371

gobject.source_remove(self.checker_initiator_tag)

1372

self.checker_initiator_tag = (gobject.timeout_add

1373

(value, self.start_checker))

1374

self.start_checker() # Start one now, too

2058

1375

2059

1376

# Checker - property

2060

@dbus_service_property(_interface,

2061

signature="s",

1377

@dbus_service_property(_interface, signature="s",

2062

1378

access="readwrite")

2063

1379

def Checker_dbus_property(self, value=None):

2064

1380

if value is None: # get

2065

1381

return dbus.String(self.checker_command)

2066

self.checker_command = str(value)

1382

self.checker_command = value

2067

1383

2068

1384

# CheckerRunning - property

2069

@dbus_service_property(_interface,

2070

signature="b",

1385

@dbus_service_property(_interface, signature="b",

2071

1386

access="readwrite")

2072

1387

def CheckerRunning_dbus_property(self, value=None):

2073

1388

if value is None: # get

2078

1393

self.stop_checker()

2079

1394

2080

1395

# ObjectPath - property

2081

@dbus_annotations(

2082

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

2083

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

2084

1396

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

2085

1397

def ObjectPath_dbus_property(self):

2086

1398

return self.dbus_object_path # is already a dbus.ObjectPath

2087

1399

2088

1400

# Secret = property

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)

1401

@dbus_service_property(_interface, signature="ay",

1402

access="write", byte_arrays=True)

2096

1403

def Secret_dbus_property(self, value):

2097

self.secret = bytes(value)

1404

self.secret = str(value)

2098

1405

2099

1406

del _interface

2100

1407

2104

1411

self._pipe = child_pipe

2105

1412

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

2106

1413

if not self._pipe.recv():

2107

raise KeyError(fpr)

1414

raise KeyError()

2108

1415

2109

1416

def __getattribute__(self, name):

2110

if name == '_pipe':

1417

if(name == '_pipe'):

2111

1418

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

2112

1419

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

2113

1420

data = self._pipe.recv()

2114

1421

if data[0] == 'data':

2115

1422

return data[1]

2116

1423

if data[0] == 'function':

2117

2118

1424

def func(*args, **kwargs):

2119

1425

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

2120

1426

return self._pipe.recv()[1]

2121

2122

1427

return func

2123

1428

2124

1429

def __setattr__(self, name, value):

2125

if name == '_pipe':

1430

if(name == '_pipe'):

2126

1431

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

2127

1432

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

2128

1433

2129

1434

1435

class ClientDBusTransitional(ClientDBus):

1436

__metaclass__ = AlternateDBusNamesMetaclass

1437

1438

2130

1439

class ClientHandler(socketserver.BaseRequestHandler, object):

2131

1440

"""A class to handle client connections.

2132

1441

2136

1445

def handle(self):

2137

1446

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

2138

1447

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

2139

str(self.client_address))

1448

unicode(self.client_address))

2140

1449

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

2141

1450

self.server.child_pipe.fileno())

2142

1451

2143

session = gnutls.ClientSession(self.request)

1452

session = (gnutls.connection

1453

.ClientSession(self.request,

1454

gnutls.connection

1455

.X509Credentials()))

1456

1457

# Note: gnutls.connection.X509Credentials is really a

1458

# generic GnuTLS certificate credentials object so long as

1459

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

1460

# here despite using OpenPGP certificates.

2144

1461

2145

1462

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

2146

1463

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

2150

1467

priority = self.server.gnutls_priority

2151

1468

if priority is None:

2152

1469

priority = "NORMAL"

2153

gnutls.priority_set_direct(session._c_object, priority,

2154

None)

1470

(gnutls.library.functions

1471

.gnutls_priority_set_direct(session._c_object,

1472

priority, None))

2155

1473

2156

1474

# Start communication using the Mandos protocol

2157

1475

# Get protocol number

2159

1477

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

2160

1478

try:

2161

1479

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

2162

raise RuntimeError(line)

1480

raise RuntimeError

2163

1481

except (ValueError, IndexError, RuntimeError) as error:

2164

1482

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

2165

1483

return

2167

1485

# Start GnuTLS connection

2168

1486

try:

2169

1487

session.handshake()

2170

except gnutls.Error as error:

1488

except gnutls.errors.GNUTLSError as error:

2171

1489

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

2172

1490

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

2173

1491

# established. Just abandon the request.

2177

1495

approval_required = False

2178

1496

try:

2179

1497

try:

2180

fpr = self.fingerprint(

2181

self.peer_certificate(session))

2182

except (TypeError, gnutls.Error) as error:

1498

fpr = self.fingerprint(self.peer_certificate

1499

(session))

1500

except (TypeError,

1501

gnutls.errors.GNUTLSError) as error:

2183

1502

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

2184

1503

return

2185

1504

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

1505

if self.server.use_dbus:

1506

# Emit D-Bus signal

1507

client.NewRequest(str(self.client_address))

2186

1508

2187

1509

try:

2188

1510

client = ProxyClient(child_pipe, fpr,

2198

1520

while True:

2199

1521

if not client.enabled:

2200

1522

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

2201

client.name)

1523

client.name)

2202

1524

if self.server.use_dbus:

2203

1525

# Emit D-Bus signal

2204

1526

client.Rejected("Disabled")

2205

1527

return

2206

1528

2207

if client.approved or not client.approval_delay:

1529

if client._approved or not client.approval_delay:

2208

1530

#We are approved or approval is disabled

2209

1531

break

2210

elif client.approved is None:

1532

elif client._approved is None:

2211

1533

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

2212

1534

client.name)

2213

1535

if self.server.use_dbus:

2214

1536

# Emit D-Bus signal

2215

1537

client.NeedApproval(

2216

client.approval_delay.total_seconds()

2217

* 1000, client.approved_by_default)

1538

client.approval_delay_milliseconds(),

1539

client.approved_by_default)

2218

1540

else:

2219

1541

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

2220

1542

client.name)

2226

1548

#wait until timeout or approved

2227

1549

time = datetime.datetime.now()

2228

1550

client.changedstate.acquire()

2229

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

1551

(client.changedstate.wait

1552

(float(client._timedelta_to_milliseconds(delay)

1553

/ 1000)))

2230

1554

client.changedstate.release()

2231

1555

time2 = datetime.datetime.now()

2232

1556

if (time2 - time) >= delay:

2243

1567

else:

2244

1568

delay -= time2 - time

2245

1569

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

1570

sent_size = 0

1571

while sent_size < len(client.secret):

1572

try:

1573

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

1574

except gnutls.errors.GNUTLSError as error:

1575

logger.warning("gnutls send failed")

1576

return

1577

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

1578

sent, len(client.secret)

1579

- (sent_size + sent))

1580

sent_size += sent

2252

1581

2253

1582

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

2254

1583

# bump the timeout using extended_timeout

2255

client.bump_timeout(client.extended_timeout)

1584

client.checked_ok(client.extended_timeout)

2256

1585

if self.server.use_dbus:

2257

1586

# Emit D-Bus signal

2258

1587

client.GotSecret()

2262

1591

client.approvals_pending -= 1

2263

1592

try:

2264

1593

session.bye()

2265

except gnutls.Error as error:

2266

logger.warning("GnuTLS bye failed",

2267

exc_info=error)

1594

except gnutls.errors.GNUTLSError as error:

1595

logger.warning("GnuTLS bye failed")

2268

1596

2269

1597

@staticmethod

2270

1598

def peer_certificate(session):

2271

1599

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

2272

1600

# If not an OpenPGP certificate...

2273

if (gnutls.certificate_type_get(session._c_object)

2274

!= gnutls.CRT_OPENPGP):

2275

# ...return invalid data

2276

return b""

1601

if (gnutls.library.functions

1602

.gnutls_certificate_type_get(session._c_object)

1603

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1604

# ...do the normal thing

1605

return session.peer_certificate

2277

1606

list_size = ctypes.c_uint(1)

2278

cert_list = (gnutls.certificate_get_peers

1607

cert_list = (gnutls.library.functions

1608

.gnutls_certificate_get_peers

2279

1609

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

2280

1610

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

2281

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

1611

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

1612

" certificate")

2282

1613

if list_size.value == 0:

2283

1614

return None

2284

1615

cert = cert_list[0]

2288

1619

def fingerprint(openpgp):

2289

1620

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2290

1621

# New GnuTLS "datum" with the OpenPGP public key

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)))

1622

datum = (gnutls.library.types

1623

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

1624

ctypes.POINTER

1625

(ctypes.c_ubyte)),

1626

ctypes.c_uint(len(openpgp))))

2295

1627

# New empty GnuTLS certificate

2296

crt = gnutls.openpgp_crt_t()

2297

gnutls.openpgp_crt_init(ctypes.byref(crt))

1628

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1629

(gnutls.library.functions

1630

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2298

1631

# Import the OpenPGP public key into the certificate

2299

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

2300

gnutls.OPENPGP_FMT_RAW)

1632

(gnutls.library.functions

1633

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

1634

gnutls.library.constants

1635

.GNUTLS_OPENPGP_FMT_RAW))

2301

1636

# Verify the self signature in the key

2302

1637

crtverify = ctypes.c_uint()

2303

gnutls.openpgp_crt_verify_self(crt, 0,

2304

ctypes.byref(crtverify))

1638

(gnutls.library.functions

1639

.gnutls_openpgp_crt_verify_self(crt, 0,

1640

ctypes.byref(crtverify)))

2305

1641

if crtverify.value != 0:

2306

gnutls.openpgp_crt_deinit(crt)

2307

raise gnutls.CertificateSecurityError("Verify failed")

1642

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1643

raise (gnutls.errors.CertificateSecurityError

1644

("Verify failed"))

2308

1645

# New buffer for the fingerprint

2309

1646

buf = ctypes.create_string_buffer(20)

2310

1647

buf_len = ctypes.c_size_t()

2311

1648

# Get the fingerprint from the certificate into the buffer

2312

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

2313

ctypes.byref(buf_len))

1649

(gnutls.library.functions

1650

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

1651

ctypes.byref(buf_len)))

2314

1652

# Deinit the certificate

2315

gnutls.openpgp_crt_deinit(crt)

1653

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2316

1654

# Convert the buffer to a Python bytestring

2317

1655

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

2318

1656

# Convert the bytestring to hexadecimal notation

2322

1660

2323

1661

class MultiprocessingMixIn(object):

2324

1662

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

2325

2326

1663

def sub_process_main(self, request, address):

2327

1664

try:

2328

1665

self.finish_request(request, address)

2329

except Exception:

1666

except:

2330

1667

self.handle_error(request, address)

2331

1668

self.close_request(request)

2332

1669

2333

1670

def process_request(self, request, address):

2334

1671

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

2335

1672

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

2336

args = (request, address))

1673

args = (request,

1674

address))

2337

1675

proc.start()

2338

1676

return proc

2339

1677

2340

1678

2341

1679

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2342

1680

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

2343

2344

1681

def process_request(self, request, client_address):

2345

1682

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

2346

1683

2355

1692

2356

1693

def add_pipe(self, parent_pipe, proc):

2357

1694

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

2358

raise NotImplementedError()

1695

raise NotImplementedError

2359

1696

2360

1697

2361

1698

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2367

1704

interface: None or a network interface name (string)

2368

1705

use_ipv6: Boolean; to use IPv6 or not

2369

1706

"""

2370

2371

1707

def __init__(self, server_address, RequestHandlerClass,

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

"""

1708

interface=None, use_ipv6=True):

2378

1709

self.interface = interface

2379

1710

if use_ipv6:

2380

1711

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.

2407

1712

socketserver.TCPServer.__init__(self, server_address,

2408

1713

RequestHandlerClass)

2409

2410

1714

def server_bind(self):

2411

1715

"""This overrides the normal server_bind() function

2412

1716

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

2418

1722

self.interface)

2419

1723

else:

2420

1724

try:

2421

self.socket.setsockopt(

2422

socket.SOL_SOCKET, SO_BINDTODEVICE,

2423

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

1725

self.socket.setsockopt(socket.SOL_SOCKET,

1726

SO_BINDTODEVICE,

1727

str(self.interface

1728

+ '\0'))

2424

1729

except socket.error as error:

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:

1730

if error[0] == errno.EPERM:

1731

logger.error("No permission to"

1732

" bind to interface %s",

1733

self.interface)

1734

elif error[0] == errno.ENOPROTOOPT:

2429

1735

logger.error("SO_BINDTODEVICE not available;"

2430

1736

" cannot bind to interface %s",

2431

1737

self.interface)

2432

elif error.errno == errno.ENODEV:

2433

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

2434

" cannot bind", self.interface)

2435

1738

else:

2436

1739

raise

2437

1740

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

2440

1743

if self.address_family == socket.AF_INET6:

2441

1744

any_address = "::" # in6addr_any

2442

1745

else:

2443

any_address = "0.0.0.0" # INADDR_ANY

1746

any_address = socket.INADDR_ANY

2444

1747

self.server_address = (any_address,

2445

1748

self.server_address[1])

2446

1749

elif not self.server_address[1]:

2447

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

1750

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

1751

0)

2448

1752

# if self.interface:

2449

1753

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

2450

1754

# 0, # port

2462

1766

gnutls_priority GnuTLS priority string

2463

1767

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

2464

1768

2465

Assumes a GObject.MainLoop event loop.

1769

Assumes a gobject.MainLoop event loop.

2466

1770

"""

2467

2468

1771

def __init__(self, server_address, RequestHandlerClass,

2469

interface=None,

2470

use_ipv6=True,

2471

clients=None,

2472

gnutls_priority=None,

2473

use_dbus=True,

2474

socketfd=None):

1772

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

1773

gnutls_priority=None, use_dbus=True):

2475

1774

self.enabled = False

2476

1775

self.clients = clients

2477

1776

if self.clients is None:

2481

1780

IPv6_TCPServer.__init__(self, server_address,

2482

1781

RequestHandlerClass,

2483

1782

interface = interface,

2484

use_ipv6 = use_ipv6,

2485

socketfd = socketfd)

2486

1783

use_ipv6 = use_ipv6)

2487

1784

def server_activate(self):

2488

1785

if self.enabled:

2489

1786

return socketserver.TCPServer.server_activate(self)

2493

1790

2494

1791

def add_pipe(self, parent_pipe, proc):

2495

1792

# Call "handle_ipc" for both data and EOF events

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))

1793

gobject.io_add_watch(parent_pipe.fileno(),

1794

gobject.IO_IN | gobject.IO_HUP,

1795

functools.partial(self.handle_ipc,

1796

parent_pipe =

1797

parent_pipe,

1798

proc = proc))

2502

1799

2503

def handle_ipc(self, source, condition,

2504

parent_pipe=None,

2505

proc = None,

2506

client_object=None):

1800

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

1801

proc = None, client_object=None):

1802

condition_names = {

1803

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

1804

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

1805

# blocking).

1806

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

1807

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

1808

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

1809

# broken, usually for pipes and

1810

# sockets).

1811

}

1812

conditions_string = ' | '.join(name

1813

for cond, name in

1814

condition_names.iteritems()

1815

if cond & condition)

2507

1816

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

2508

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

1817

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

2509

1818

# Wait for other process to exit

2510

1819

proc.join()

2511

1820

return False

2532

1841

parent_pipe.send(False)

2533

1842

return False

2534

1843

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))

1844

gobject.io_add_watch(parent_pipe.fileno(),

1845

gobject.IO_IN | gobject.IO_HUP,

1846

functools.partial(self.handle_ipc,

1847

parent_pipe =

1848

parent_pipe,

1849

proc = proc,

1850

client_object =

1851

client))

2542

1852

parent_pipe.send(True)

2543

1853

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

2544

1854

# same fileno

2550

1860

2551

1861

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

2552

1862

funcname)(*args,

2553

**kwargs)))

1863

**kwargs)))

2554

1864

2555

1865

if command == 'getattr':

2556

1866

attrname = request[1]

2557

if isinstance(client_object.__getattribute__(attrname),

2558

collections.Callable):

2559

parent_pipe.send(('function', ))

1867

if callable(client_object.__getattribute__(attrname)):

1868

parent_pipe.send(('function',))

2560

1869

else:

2561

parent_pipe.send((

2562

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

1870

parent_pipe.send(('data', client_object

1871

.__getattribute__(attrname)))

2563

1872

2564

1873

if command == 'setattr':

2565

1874

attrname = request[1]

2569

1878

return True

2570

1879

2571

1880

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

2668

1881

def string_to_delta(interval):

2669

1882

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

2670

1883

2681

1894

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

2682

1895

datetime.timedelta(0, 330)

2683

1896

"""

2684

2685

try:

2686

return rfc3339_duration_to_delta(interval)

2687

except ValueError:

2688

pass

2689

2690

1897

timevalue = datetime.timedelta(0)

2691

1898

for s in interval.split():

2692

1899

try:

2693

suffix = s[-1]

1900

suffix = unicode(s[-1])

2694

1901

value = int(s[:-1])

2695

1902

if suffix == "d":

2696

1903

delta = datetime.timedelta(value)

2703

1910

elif suffix == "w":

2704

1911

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

2705

1912

else:

2706

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

2707

except IndexError as e:

1913

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

1914

except (ValueError, IndexError) as e:

2708

1915

raise ValueError(*(e.args))

2709

1916

timevalue += delta

2710

1917

return timevalue

2723

1930

sys.exit()

2724

1931

if not noclose:

2725

1932

# Close all standard open file descriptors

2726

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

1933

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

2727

1934

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

2728

1935

raise OSError(errno.ENODEV,

2729

"{} not a character device"

2730

.format(os.devnull))

1936

"%s not a character device"

1937

% os.path.devnull)

2731

1938

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

2732

1939

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

2733

1940

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

2742

1949

2743

1950

parser = argparse.ArgumentParser()

2744

1951

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

2745

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

1952

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

2746

1953

help="show version number and exit")

2747

1954

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

2748

1955

help="Bind to interface IF")

2754

1961

help="Run self-test")

2755

1962

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

2756

1963

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

2757

" to terminal", default=None)

1964

" to terminal")

2758

1965

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

2759

1966

help="Debug level for stdout output")

2760

1967

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

2767

1974

" files")

2768

1975

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

2769

1976

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

2770

" system bus interface", default=None)

1977

" system bus interface")

2771

1978

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

2772

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

2773

default=None)

1979

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

2774

1980

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

2775

1981

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")

1982

" state")

2780

1983

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

2781

1984

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)

2787

1985

2788

1986

options = parser.parse_args()

2789

1987

2790

1988

if options.check:

2791

1989

import doctest

2792

fail_count, test_count = doctest.testmod()

2793

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

1990

doctest.testmod()

1991

sys.exit()

2794

1992

2795

1993

# Default values for config file for server-global settings

2796

1994

server_defaults = { "interface": "",

2798

1996

"port": "",

2799

1997

"debug": "False",

2800

1998

"priority":

2801

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

2802

":+SIGN-DSA-SHA256",

1999

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

2803

2000

"servicename": "Mandos",

2804

2001

"use_dbus": "True",

2805

2002

"use_ipv6": "True",

2806

2003

"debuglevel": "",

2807

2004

"restore": "True",

2808

"socket": "",

2809

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

2810

"foreground": "False",

2811

"zeroconf": "True",

2812

}

2005

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

2006

}

2813

2007

2814

2008

# Parse config file for server-global settings

2815

2009

server_config = configparser.SafeConfigParser(server_defaults)

2816

2010

del server_defaults

2817

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

2011

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

2012

"mandos.conf"))

2818

2013

# Convert the SafeConfigParser object to a dict

2819

2014

server_settings = server_config.defaults()

2820

2015

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

2821

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

2016

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

2822

2017

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

2823

2018

option)

2824

2019

if server_settings["port"]:

2825

2020

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

2826

2021

"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"])

2836

2022

del server_config

2837

2023

2838

2024

# Override the settings from the config file with command line

2839

2025

# options, if set.

2840

2026

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

2841

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

2842

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

2843

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

2027

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

2028

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

2029

"statedir"):

2844

2030

value = getattr(options, option)

2845

2031

if value is not None:

2846

2032

server_settings[option] = value

2847

2033

del options

2848

2034

# Force all strings to be unicode

2849

2035

for option in server_settings.keys():

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

2036

if type(server_settings[option]) is str:

2037

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

2860

2038

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

2861

2039

2862

2040

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

2863

2041

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

2869

2042

# For convenience

2870

2043

debug = server_settings["debug"]

2871

2044

debuglevel = server_settings["debuglevel"]

2873

2046

use_ipv6 = server_settings["use_ipv6"]

2874

2047

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

2875

2048

stored_state_file)

2876

foreground = server_settings["foreground"]

2877

zeroconf = server_settings["zeroconf"]

2878

2049

2879

2050

if debug:

2880

initlogger(debug, logging.DEBUG)

2051

initlogger(logging.DEBUG)

2881

2052

else:

2882

2053

if not debuglevel:

2883

initlogger(debug)

2054

initlogger()

2884

2055

else:

2885

2056

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

2886

initlogger(debug, level)

2057

initlogger(level)

2887

2058

2888

2059

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

2889

syslogger.setFormatter(

2890

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

2891

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

2892

server_settings["servicename"])))

2060

syslogger.setFormatter(logging.Formatter

2061

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

2062

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

2063

% server_settings["servicename"]))

2893

2064

2894

2065

# Parse config file with clients

2895

client_config = configparser.SafeConfigParser(Client

2896

.client_defaults)

2066

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

2067

"extended_timeout": "15m",

2068

"interval": "2m",

2069

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

2070

"host": "",

2071

"approval_delay": "0s",

2072

"approval_duration": "1s",

2073

}

2074

client_config = configparser.SafeConfigParser(client_defaults)

2897

2075

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

2898

2076

"clients.conf"))

2899

2077

2900

2078

global mandos_dbus_service

2901

2079

mandos_dbus_service = None

2902

2080

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

2081

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

2082

server_settings["port"]),

2083

ClientHandler,

2084

interface=(server_settings["interface"]

2085

or None),

2086

use_ipv6=use_ipv6,

2087

gnutls_priority=

2088

server_settings["priority"],

2089

use_dbus=use_dbus)

2090

if not debug:

2091

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

2919

2092

try:

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)

2093

pidfile = open(pidfilename, "w")

2094

except IOError:

2095

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

2924

2096

2925

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

2926

("mandos", "mandos"),

2927

("nobody", "nogroup")):

2097

try:

2098

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

2099

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

2100

except KeyError:

2928

2101

try:

2929

uid = pwd.getpwnam(name).pw_uid

2930

gid = pwd.getpwnam(group).pw_gid

2931

break

2102

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

2103

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

2932

2104

except KeyError:

2933

continue

2934

else:

2935

uid = 65534

2936

gid = 65534

2105

try:

2106

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

2107

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

2108

except KeyError:

2109

uid = 65534

2110

gid = 65534

2937

2111

try:

2938

2112

os.setgid(gid)

2939

2113

os.setuid(uid)

2940

2114

except OSError as error:

2941

if error.errno != errno.EPERM:

2942

raise

2115

if error[0] != errno.EPERM:

2116

raise error

2943

2117

2944

2118

if debug:

2945

2119

# Enable all possible GnuTLS debugging

2946

2120

2947

2121

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

2948

2122

# - GnuTLS manual

2949

gnutls.global_set_log_level(11)

2123

gnutls.library.functions.gnutls_global_set_log_level(11)

2950

2124

2951

@gnutls.log_func

2125

@gnutls.library.types.gnutls_log_func

2952

2126

def debug_gnutls(level, string):

2953

2127

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

2954

2128

2955

gnutls.global_set_log_function(debug_gnutls)

2129

(gnutls.library.functions

2130

.gnutls_global_set_log_function(debug_gnutls))

2956

2131

2957

2132

# Redirect stdin so all checkers get /dev/null

2958

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

2133

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

2959

2134

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

2960

2135

if null > 2:

2961

2136

os.close(null)

2137

else:

2138

# No console logging

2139

logger.removeHandler(console)

2962

2140

2963

2141

# Need to fork before connecting to D-Bus

2964

if not foreground:

2142

if not debug:

2965

2143

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

2966

2144

daemon()

2967

2145

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

2972

2146

global main_loop

2973

2147

# From the Avahi example code

2974

DBusGMainLoop(set_as_default=True)

2975

main_loop = GObject.MainLoop()

2148

DBusGMainLoop(set_as_default=True )

2149

main_loop = gobject.MainLoop()

2976

2150

bus = dbus.SystemBus()

2977

2151

# End of Avahi example code

2978

2152

if use_dbus:

2979

2153

try:

2980

2154

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

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)

2155

bus, do_not_queue=True)

2156

old_bus_name = (dbus.service.BusName

2157

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

2158

do_not_queue=True))

2159

except dbus.exceptions.NameExistsException as e:

2160

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

2988

2161

use_dbus = False

2989

2162

server_settings["use_dbus"] = False

2990

2163

tcp_server.use_dbus = False

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"))

2164

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2165

service = AvahiServiceToSyslog(name =

2166

server_settings["servicename"],

2167

servicetype = "_mandos._tcp",

2168

protocol = protocol, bus = bus)

2169

if server_settings["interface"]:

2170

service.interface = (if_nametoindex

2171

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

3001

2172

3002

2173

global multiprocessing_manager

3003

2174

multiprocessing_manager = multiprocessing.Manager()

3004

2175

3005

2176

client_class = Client

3006

2177

if use_dbus:

3007

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

3008

3009

client_settings = Client.config_parser(client_config)

2178

client_class = functools.partial(ClientDBusTransitional,

2179

bus = bus)

2180

2181

special_settings = {

2182

# Some settings need to be accessd by special methods;

2183

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

2184

"approved_by_default":

2185

lambda section:

2186

client_config.getboolean(section, "approved_by_default"),

2187

"enabled":

2188

lambda section:

2189

client_config.getboolean(section, "enabled"),

2190

}

2191

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

2192

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

2193

# with exceptions for any special settings as defined above

2194

client_settings = dict((clientname,

2195

dict((setting,

2196

(value

2197

if setting not in special_settings

2198

else special_settings[setting]

2199

(clientname)))

2200

for setting, value in

2201

client_config.items(clientname)))

2202

for clientname in client_config.sections())

2203

3010

2204

old_client_settings = {}

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()

2205

clients_data = []

3020

2206

3021

2207

# Get client data and settings from last running state.

3022

2208

if server_settings["restore"]:

3023

2209

try:

3024

2210

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

3025

clients_data, old_client_settings = pickle.load(

3026

stored_state)

2211

clients_data, old_client_settings = (pickle.load

2212

(stored_state))

3027

2213

os.remove(stored_state_path)

3028

2214

except IOError as e:

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)

2215

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

2216

.format(e))

2217

if e.errno != errno.ENOENT:

3035

2218

raise

3036

except EOFError as e:

3037

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

3038

"EOFError:",

3039

exc_info=e)

3040

2219

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

2220

with Crypto() as crypt:

2221

for client in clients_data:

2222

client_name = client["name"]

3046

2223

3047

2224

# Decide which value to use after restoring saved state.

3048

2225

# We have three different values: Old config file,

3054

2231

# For each value in new config, check if it

3055

2232

# differs from the old config value (Except for

3056

2233

# the "secret" attribute)

3057

if (name != "secret"

3058

and (value !=

3059

old_client_settings[client_name][name])):

3060

client[name] = value

2234

if (name != "secret" and

2235

value != old_client_settings[client_name]

2236

[name]):

2237

setattr(client, name, value)

3061

2238

except KeyError:

3062

2239

pass

3063

2240

3064

2241

# 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"]))

2242

# enabled if its last checker was sucessful. Clients

2243

# whose checker failed before we stored its state is

2244

# assumed to have failed all checkers during downtime.

2245

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

2246

if ((datetime.datetime.utcnow()

2247

- client["last_checked_ok"])

2248

> client["interval"]):

2249

if client["last_checker_status"] != 0:

3084

2250

client["enabled"] = False

3085

2251

else:

3086

client["expires"] = (

3087

datetime.datetime.utcnow()

3088

+ client["timeout"])

3089

logger.debug("Last checker succeeded,"

3090

" keeping {} enabled".format(

3091

client_name))

2252

client["expires"] = (datetime.datetime

2253

.utcnow()

2254

+ client["timeout"])

2255

2256

client["changedstate"] = (multiprocessing_manager

2257

.Condition

2258

(multiprocessing_manager

2259

.Lock()))

2260

if use_dbus:

2261

new_client = (ClientDBusTransitional.__new__

2262

(ClientDBusTransitional))

2263

tcp_server.clients[client_name] = new_client

2264

new_client.bus = bus

2265

for name, value in client.iteritems():

2266

setattr(new_client, name, value)

2267

client_object_name = unicode(client_name).translate(

2268

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

2269

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

2270

new_client.dbus_object_path = (dbus.ObjectPath

2271

("/clients/"

2272

+ client_object_name))

2273

DBusObjectWithProperties.__init__(new_client,

2274

new_client.bus,

2275

new_client

2276

.dbus_object_path)

2277

else:

2278

tcp_server.clients[client_name] = (Client.__new__

2279

(Client))

2280

for name, value in client.iteritems():

2281

setattr(tcp_server.clients[client_name],

2282

name, value)

2283

3092

2284

try:

3093

client["secret"] = pgp.decrypt(

3094

client["encrypted_secret"],

2285

tcp_server.clients[client_name].secret = (

2286

crypt.decrypt(tcp_server.clients[client_name]

2287

.encrypted_secret,

2288

client_settings[client_name]

2289

["secret"]))

2290

except CryptoError:

2291

# If decryption fails, we use secret from new settings

2292

tcp_server.clients[client_name].secret = (

3095

2293

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)

2294

2295

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

2296

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

2297

del tcp_server.clients[clientname]

2298

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

2299

tcp_server.clients[clientname] = (client_class(name

2300

= clientname,

2301

config =

2302

client_settings

2303

[clientname]))

3117

2304

3118

2305

if not tcp_server.clients:

3119

2306

logger.warning("No clients defined")

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

2307

2308

if not debug:

2309

try:

2310

with pidfile:

2311

pid = os.getpid()

2312

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

2313

del pidfile

2314

except IOError:

2315

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

2316

pidfilename, pid)

2317

except NameError:

2318

# "pidfile" was never created

2319

pass

3131

2320

del pidfilename

2321

2322

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

3132

2323

3133

2324

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

3134

2325

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

3135

2326

3136

2327

if use_dbus:

3137

3138

@alternate_dbus_interfaces(

3139

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

3140

class MandosDBusService(DBusObjectWithObjectManager):

2328

class MandosDBusService(dbus.service.Object):

3141

2329

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

3142

3143

2330

def __init__(self):

3144

2331

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

3145

3146

2332

_interface = "se.recompile.Mandos"

3147

2333

3148

2334

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

3155

2341

"D-Bus signal"

3156

2342

pass

3157

2343

3158

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

3159

"true"})

3160

2344

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

3161

2345

def ClientRemoved(self, objpath, name):

3162

2346

"D-Bus signal"

3163

2347

pass

3164

2348

3165

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

3166

"true"})

3167

2349

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

3168

2350

def GetAllClients(self):

3169

2351

"D-Bus method"

3170

return dbus.Array(c.dbus_object_path for c in

2352

return dbus.Array(c.dbus_object_path

2353

for c in

3171

2354

tcp_server.clients.itervalues())

3172

2355

3173

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

3174

"true"})

3175

2356

@dbus.service.method(_interface,

3176

2357

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

3177

2358

def GetAllClientsWithProperties(self):

3178

2359

"D-Bus method"

3179

2360

return dbus.Dictionary(

3180

{ c.dbus_object_path: c.GetAll(

3181

"se.recompile.Mandos.Client")

3182

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

2361

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

2362

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

3183

2363

signature="oa{sv}")

3184

2364

3185

2365

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

3189

2369

if c.dbus_object_path == object_path:

3190

2370

del tcp_server.clients[c.name]

3191

2371

c.remove_from_connection()

3192

# Don't signal the disabling

2372

# Don't signal anything except ClientRemoved

3193

2373

c.disable(quiet=True)

3194

# Emit D-Bus signal for removal

3195

self.client_removed_signal(c)

2374

# Emit D-Bus signal

2375

self.ClientRemoved(object_path, c.name)

3196

2376

return

3197

2377

raise KeyError(object_path)

3198

2378

3199

2379

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)

3236

2380

3237

mandos_dbus_service = MandosDBusService()

2381

class MandosDBusServiceTransitional(MandosDBusService):

2382

__metaclass__ = AlternateDBusNamesMetaclass

2383

mandos_dbus_service = MandosDBusServiceTransitional()

3238

2384

3239

2385

def cleanup():

3240

2386

"Cleanup function; run on exit"

3241

if zeroconf:

3242

service.cleanup()

2387

service.cleanup()

3243

2388

3244

2389

multiprocessing.active_children()

3245

wnull.close()

3246

2390

if not (tcp_server.clients or client_settings):

3247

2391

return

3248

2392

3249

2393

# Store client before exiting. Secrets are encrypted with key

3250

2394

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

3251

2395

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

3252

clients = {}

3253

with PGPEngine() as pgp:

2396

clients = []

2397

with Crypto() as crypt:

3254

2398

for client in tcp_server.clients.itervalues():

3255

2399

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

3256

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

3257

key)

2400

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

2401

key)

3258

2402

client_dict = {}

3259

2403

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):

2404

# A list of attributes that will not be stored when

2405

# shutting down.

2406

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

2407

for name, typ in (inspect.getmembers

2408

(dbus.service.Object)):

3266

2409

exclude.add(name)

3267

2410

3268

2411

client_dict["encrypted_secret"] = (client

3271

2414

if attr not in exclude:

3272

2415

client_dict[attr] = getattr(client, attr)

3273

2416

3274

clients[client.name] = client_dict

2417

clients.append(client_dict)

3275

2418

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

3276

2419

3277

2420

try:

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:

2421

with os.fdopen(os.open(stored_state_path,

2422

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

2423

0600), "wb") as stored_state:

3284

2424

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

3285

tempname = stored_state.name

3286

os.rename(tempname, stored_state_path)

3287

2425

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)

2426

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

2427

.format(e))

2428

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

3299

2429

raise

3300

2430

3301

2431

# Delete all clients, and settings from config

3303

2433

name, client = tcp_server.clients.popitem()

3304

2434

if use_dbus:

3305

2435

client.remove_from_connection()

3306

# Don't signal the disabling

2436

# Don't signal anything except ClientRemoved

3307

2437

client.disable(quiet=True)

3308

# Emit D-Bus signal for removal

3309

2438

if use_dbus:

3310

mandos_dbus_service.client_removed_signal(client)

2439

# Emit D-Bus signal

2440

mandos_dbus_service.ClientRemoved(client

2441

.dbus_object_path,

2442

client.name)

3311

2443

client_settings.clear()

3312

2444

3313

2445

atexit.register(cleanup)

3314

2446

3315

2447

for client in tcp_server.clients.itervalues():

3316

2448

if use_dbus:

3317

# Emit D-Bus signal for adding

3318

mandos_dbus_service.client_added_signal(client)

2449

# Emit D-Bus signal

2450

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3319

2451

# Need to initiate checking of clients

3320

2452

if client.enabled:

3321

2453

client.init_checker()

3324

2456

tcp_server.server_activate()

3325

2457

3326

2458

# Find out what port we got

3327

if zeroconf:

3328

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

2459

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

3329

2460

if use_ipv6:

3330

2461

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

3331

" flowinfo %d, scope_id %d",

3332

*tcp_server.socket.getsockname())

2462

" flowinfo %d, scope_id %d"

2463

% tcp_server.socket.getsockname())

3333

2464

else: # IPv4

3334

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

3335

*tcp_server.socket.getsockname())

2465

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

2466

% tcp_server.socket.getsockname())

3336

2467

3337

2468

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

3338

2469

3339

2470

try:

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

2471

# From the Avahi example code

2472

try:

2473

service.activate()

2474

except dbus.exceptions.DBusException as error:

2475

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

2476

cleanup()

2477

sys.exit(1)

2478

# End of Avahi example code

3349

2479

3350

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

2480

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

3351

2481

lambda *args, **kwargs:

3352

2482

(tcp_server.handle_request

3353

2483

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

3355

2485

logger.debug("Starting main loop")

3356

2486

main_loop.run()

3357

2487

except AvahiError as error:

3358

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

2488

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

3359

2489

cleanup()

3360

2490

sys.exit(1)

3361

2491

except KeyboardInterrupt: