/mandos/trunk : revision 837

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

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#

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# Everything else is

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#

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

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

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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import SocketServer as socketserver

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try:

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from future_builtins import *

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except ImportError:

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pass

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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import avahi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.4.1"

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version = "1.7.6"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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

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

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return interface_index

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def initlogger(level=logging.WARNING):

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def copy_function(func):

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"""Make a copy of a function"""

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class CryptoError(Exception):

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class PGPError(Exception):

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

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pass

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class Crypto(object):

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet'])

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self.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(b":")

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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

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

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self._cleanup()

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return False

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def password_encode(self, password):

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

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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

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with open(os.devnull) as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise CryptoError(e)

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self.gnupg.passphrase = None

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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

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with open(os.devnull) as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise CryptoError(e)

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self.gnupg.passphrase = None

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class Avahi(object):

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

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It is instantiated once, and simulates having an Avahi module."""

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IF_UNSPEC = -1 # avahi-common/address.h

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PROTO_UNSPEC = -1 # avahi-common/address.h

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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return dbus.Array((dbus.ByteArray(s.encode("utf-8"))

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for s in t), signature="ay")

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

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class AvahiError(Exception):

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

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self.value = value

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

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def __unicode__(self):

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return unicode(repr(self.value))

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

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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339

self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

262

def rename(self):

342

343

def rename(self, remove=True):

263

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

264

345

if self.rename_count >= self.max_renames:

265

346

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

266

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" after %i retries, exiting.",

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self.rename_count)

268

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raise AvahiServiceError("Too many renames")

269

self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

350

self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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353

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

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354

self.name)

273

self.remove()

355

if remove:

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self.remove()

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357

try:

275

358

self.add()

276

359

except dbus.exceptions.DBusException as error:

277

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

278

self.cleanup()

279

os._exit(1)

280

self.rename_count += 1

360

if (error.get_dbus_name()

361

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

362

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

363

return self.rename(remove=False)

364

else:

365

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

366

self.cleanup()

367

os._exit(1)

368

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369

def remove(self):

282

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

283

371

if self.entry_group_state_changed_match is not None:

285

373

self.entry_group_state_changed_match = None

286

374

if self.group is not None:

287

375

self.group.Reset()

376

288

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def add(self):

289

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

290

379

self.remove()

307

396

dbus.UInt16(self.port),

308

397

avahi.string_array_to_txt_array(self.TXT))

309

398

self.group.Commit()

399

310

400

def entry_group_state_changed(self, state, error):

311

401

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

312

402

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

318

408

self.rename()

319

409

elif state == avahi.ENTRY_GROUP_FAILURE:

320

410

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

321

unicode(error))

322

raise AvahiGroupError("State changed: %s"

323

% unicode(error))

411

str(error))

412

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

413

324

414

def cleanup(self):

325

415

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

326

416

if self.group is not None:

331

421

pass

332

422

self.group = None

333

423

self.remove()

424

334

425

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

335

426

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

336

427

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

337

bad_states = { avahi.SERVER_INVALID:

338

"Zeroconf server invalid",

339

avahi.SERVER_REGISTERING: None,

340

avahi.SERVER_COLLISION:

341

"Zeroconf server name collision",

342

avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

428

bad_states = {

429

avahi.SERVER_INVALID: "Zeroconf server invalid",

430

avahi.SERVER_REGISTERING: None,

431

avahi.SERVER_COLLISION: "Zeroconf server name collision",

432

avahi.SERVER_FAILURE: "Zeroconf server failure",

433

}

344

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if state in bad_states:

345

435

if bad_states[state] is not None:

346

436

if error is None:

349

439

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

350

440

self.cleanup()

351

441

elif state == avahi.SERVER_RUNNING:

352

self.add()

442

try:

443

self.add()

444

except dbus.exceptions.DBusException as error:

445

if (error.get_dbus_name()

446

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

447

logger.info("Local Zeroconf service name"

448

" collision.")

449

return self.rename(remove=False)

450

else:

451

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

452

self.cleanup()

453

os._exit(1)

353

454

else:

354

455

if error is None:

355

456

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

356

457

else:

357

458

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

459

358

460

def activate(self):

359

461

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

360

462

if self.server is None:

364

466

follow_name_owner_changes=True),

365

467

avahi.DBUS_INTERFACE_SERVER)

366

468

self.server.connect_to_signal("StateChanged",

367

self.server_state_changed)

469

self.server_state_changed)

368

470

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

369

471

472

370

473

class AvahiServiceToSyslog(AvahiService):

371

def rename(self):

474

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

372

475

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

373

ret = AvahiService.rename(self)

374

syslogger.setFormatter(logging.Formatter

375

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

376

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

377

% self.name))

476

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

477

syslogger.setFormatter(logging.Formatter(

478

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

479

.format(self.name)))

378

480

return ret

379

481

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

482

# Pretend that we have a GnuTLS module

483

class GnuTLS(object):

484

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

485

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

486

487

_library = ctypes.cdll.LoadLibrary(

488

ctypes.util.find_library("gnutls"))

489

_need_version = b"3.3.0"

490

def __init__(self):

491

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

492

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

493

# happens.

494

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

495

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

496

.format(self._need_version))

497

498

# Unless otherwise indicated, the constants and types below are

499

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

500

501

# Constants

502

E_SUCCESS = 0

503

E_INTERRUPTED = -52

504

E_AGAIN = -28

505

CRT_OPENPGP = 2

506

CLIENT = 2

507

SHUT_RDWR = 0

508

CRD_CERTIFICATE = 1

509

E_NO_CERTIFICATE_FOUND = -49

510

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

511

512

# Types

513

class session_int(ctypes.Structure):

514

_fields_ = []

515

session_t = ctypes.POINTER(session_int)

516

class certificate_credentials_st(ctypes.Structure):

517

_fields_ = []

518

certificate_credentials_t = ctypes.POINTER(

519

certificate_credentials_st)

520

certificate_type_t = ctypes.c_int

521

class datum_t(ctypes.Structure):

522

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

523

('size', ctypes.c_uint)]

524

class openpgp_crt_int(ctypes.Structure):

525

_fields_ = []

526

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

527

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

528

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

529

credentials_type_t = ctypes.c_int

530

transport_ptr_t = ctypes.c_void_p

531

close_request_t = ctypes.c_int

532

533

# Exceptions

534

class Error(Exception):

535

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

536

# exception might be raised from within GnuTLS.__init__,

537

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

538

# global variable has happened.

539

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

540

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

541

# code is passed, convert it to a string with

542

# gnutls.strerror()

543

self.code = code

544

if message is None and code is not None:

545

message = GnuTLS.strerror(code)

546

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

547

message, *args)

548

549

class CertificateSecurityError(Error):

550

pass

551

552

# Classes

553

class Credentials(object):

554

def __init__(self):

555

self._c_object = gnutls.certificate_credentials_t()

556

gnutls.certificate_allocate_credentials(

557

ctypes.byref(self._c_object))

558

self.type = gnutls.CRD_CERTIFICATE

559

560

def __del__(self):

561

gnutls.certificate_free_credentials(self._c_object)

562

563

class ClientSession(object):

564

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

565

self._c_object = gnutls.session_t()

566

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

567

gnutls.set_default_priority(self._c_object)

568

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

569

gnutls.handshake_set_private_extensions(self._c_object,

570

True)

571

self.socket = socket

572

if credentials is None:

573

credentials = gnutls.Credentials()

574

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

575

ctypes.cast(credentials._c_object,

576

ctypes.c_void_p))

577

self.credentials = credentials

578

579

def __del__(self):

580

gnutls.deinit(self._c_object)

581

582

def handshake(self):

583

return gnutls.handshake(self._c_object)

584

585

def send(self, data):

586

data = bytes(data)

587

data_len = len(data)

588

while data_len > 0:

589

data_len -= gnutls.record_send(self._c_object,

590

data[-data_len:],

591

data_len)

592

593

def bye(self):

594

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

595

596

# Error handling functions

597

def _error_code(result):

598

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

599

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

600

if result >= 0:

601

return result

602

if result == gnutls.E_NO_CERTIFICATE_FOUND:

603

raise gnutls.CertificateSecurityError(code = result)

604

raise gnutls.Error(code = result)

605

606

def _retry_on_error(result, func, arguments):

607

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

608

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

609

while result < 0:

610

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

611

return _error_code(result)

612

result = func(*arguments)

613

return result

614

615

# Unless otherwise indicated, the function declarations below are

616

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

617

618

# Functions

619

priority_set_direct = _library.gnutls_priority_set_direct

620

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

621

ctypes.POINTER(ctypes.c_char_p)]

622

priority_set_direct.restype = _error_code

623

624

init = _library.gnutls_init

625

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

626

init.restype = _error_code

627

628

set_default_priority = _library.gnutls_set_default_priority

629

set_default_priority.argtypes = [session_t]

630

set_default_priority.restype = _error_code

631

632

record_send = _library.gnutls_record_send

633

record_send.argtypes = [session_t, ctypes.c_void_p,

634

ctypes.c_size_t]

635

record_send.restype = ctypes.c_ssize_t

636

record_send.errcheck = _retry_on_error

637

638

certificate_allocate_credentials = (

639

_library.gnutls_certificate_allocate_credentials)

640

certificate_allocate_credentials.argtypes = [

641

ctypes.POINTER(certificate_credentials_t)]

642

certificate_allocate_credentials.restype = _error_code

643

644

certificate_free_credentials = (

645

_library.gnutls_certificate_free_credentials)

646

certificate_free_credentials.argtypes = [certificate_credentials_t]

647

certificate_free_credentials.restype = None

648

649

handshake_set_private_extensions = (

650

_library.gnutls_handshake_set_private_extensions)

651

handshake_set_private_extensions.argtypes = [session_t,

652

ctypes.c_int]

653

handshake_set_private_extensions.restype = None

654

655

credentials_set = _library.gnutls_credentials_set

656

credentials_set.argtypes = [session_t, credentials_type_t,

657

ctypes.c_void_p]

658

credentials_set.restype = _error_code

659

660

strerror = _library.gnutls_strerror

661

strerror.argtypes = [ctypes.c_int]

662

strerror.restype = ctypes.c_char_p

663

664

certificate_type_get = _library.gnutls_certificate_type_get

665

certificate_type_get.argtypes = [session_t]

666

certificate_type_get.restype = _error_code

667

668

certificate_get_peers = _library.gnutls_certificate_get_peers

669

certificate_get_peers.argtypes = [session_t,

670

ctypes.POINTER(ctypes.c_uint)]

671

certificate_get_peers.restype = ctypes.POINTER(datum_t)

672

673

global_set_log_level = _library.gnutls_global_set_log_level

674

global_set_log_level.argtypes = [ctypes.c_int]

675

global_set_log_level.restype = None

676

677

global_set_log_function = _library.gnutls_global_set_log_function

678

global_set_log_function.argtypes = [log_func]

679

global_set_log_function.restype = None

680

681

deinit = _library.gnutls_deinit

682

deinit.argtypes = [session_t]

683

deinit.restype = None

684

685

handshake = _library.gnutls_handshake

686

handshake.argtypes = [session_t]

687

handshake.restype = _error_code

688

handshake.errcheck = _retry_on_error

689

690

transport_set_ptr = _library.gnutls_transport_set_ptr

691

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

692

transport_set_ptr.restype = None

693

694

bye = _library.gnutls_bye

695

bye.argtypes = [session_t, close_request_t]

696

bye.restype = _error_code

697

bye.errcheck = _retry_on_error

698

699

check_version = _library.gnutls_check_version

700

check_version.argtypes = [ctypes.c_char_p]

701

check_version.restype = ctypes.c_char_p

702

703

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

704

705

openpgp_crt_init = _library.gnutls_openpgp_crt_init

706

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

707

openpgp_crt_init.restype = _error_code

708

709

openpgp_crt_import = _library.gnutls_openpgp_crt_import

710

openpgp_crt_import.argtypes = [openpgp_crt_t,

711

ctypes.POINTER(datum_t),

712

openpgp_crt_fmt_t]

713

openpgp_crt_import.restype = _error_code

714

715

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

716

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

717

ctypes.POINTER(ctypes.c_uint)]

718

openpgp_crt_verify_self.restype = _error_code

719

720

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

721

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

722

openpgp_crt_deinit.restype = None

723

724

openpgp_crt_get_fingerprint = (

725

_library.gnutls_openpgp_crt_get_fingerprint)

726

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

727

ctypes.c_void_p,

728

ctypes.POINTER(

729

ctypes.c_size_t)]

730

openpgp_crt_get_fingerprint.restype = _error_code

731

732

# Remove non-public functions

733

del _error_code, _retry_on_error

734

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

735

gnutls = GnuTLS()

736

737

def call_pipe(connection, # : multiprocessing.Connection

738

func, *args, **kwargs):

739

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

740

741

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

742

return value on the provided multiprocessing.Connection.

743

"""

744

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

745

connection.close()

746

386

747

class Client(object):

387

748

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

388

749

389

750

Attributes:

390

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

751

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

391

752

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

392

753

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

393

754

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

394

755

to see if the client lives.

395

756

'None' if no process is running.

396

checker_callback_tag: a gobject event source tag, or None

757

checker_callback_tag: a GLib event source tag, or None

397

758

checker_command: string; External command which is run to check

398

759

if client lives. %() expansions are done at

399

760

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

400

761

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

401

checker_initiator_tag: a gobject event source tag, or None

762

checker_initiator_tag: a GLib event source tag, or None

402

763

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

403

764

client_structure: Object describing what attributes a client has

404

765

and is used for storing the client at exit

405

766

current_checker_command: string; current running checker_command

406

disable_initiator_tag: a gobject event source tag, or None

767

disable_initiator_tag: a GLib event source tag, or None

407

768

enabled: bool()

408

769

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

409

770

uniquely identify the client

411

772

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

412

773

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

413

774

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

414

415

775

last_checker_status: integer between 0 and 255 reflecting exit

416

776

status of last checker. -1 reflects crashed

417

checker, or None.

418

last_enabled: datetime.datetime(); (UTC)

777

checker, -2 means no checker completed yet.

778

last_checker_signal: The signal which killed the last checker, if

779

last_checker_status is -1

780

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

419

781

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

420

782

D-Bus identifiers

421

783

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

422

784

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

423

785

until this client is disabled

424

extended_timeout: extra long timeout when password has been sent

786

extended_timeout: extra long timeout when secret has been sent

425

787

runtime_expansions: Allowed attributes for runtime expansion.

426

788

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

427

789

disabled, or None

790

server_settings: The server_settings dict from main()

428

791

"""

429

792

430

793

runtime_expansions = ("approval_delay", "approval_duration",

431

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

432

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

794

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

795

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

796

"last_approval_request", "last_checked_ok",

433

797

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

434

435

def timeout_milliseconds(self):

436

"Return the 'timeout' attribute in milliseconds"

437

return _timedelta_to_milliseconds(self.timeout)

438

439

def extended_timeout_milliseconds(self):

440

"Return the 'extended_timeout' attribute in milliseconds"

441

return _timedelta_to_milliseconds(self.extended_timeout)

442

443

def interval_milliseconds(self):

444

"Return the 'interval' attribute in milliseconds"

445

return _timedelta_to_milliseconds(self.interval)

446

447

def approval_delay_milliseconds(self):

448

return _timedelta_to_milliseconds(self.approval_delay)

449

450

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

451

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

452

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

453

attribute."""

798

client_defaults = {

799

"timeout": "PT5M",

800

"extended_timeout": "PT15M",

801

"interval": "PT2M",

802

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

803

"host": "",

804

"approval_delay": "PT0S",

805

"approval_duration": "PT1S",

806

"approved_by_default": "True",

807

"enabled": "True",

808

}

809

810

@staticmethod

811

def config_parser(config):

812

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

813

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

814

with exceptions for any special settings as defined above.

815

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

816

value given the same arguments.

817

"""

818

settings = {}

819

for client_name in config.sections():

820

section = dict(config.items(client_name))

821

client = settings[client_name] = {}

822

823

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

824

# Reformat values from string types to Python types

825

client["approved_by_default"] = config.getboolean(

826

client_name, "approved_by_default")

827

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

828

"enabled")

829

830

# Uppercase and remove spaces from fingerprint for later

831

# comparison purposes with return value from the

832

# fingerprint() function

833

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

834

.replace(" ", ""))

835

if "secret" in section:

836

client["secret"] = codecs.decode(section["secret"]

837

.encode("utf-8"),

838

"base64")

839

elif "secfile" in section:

840

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

841

(section["secfile"])),

842

"rb") as secfile:

843

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

844

else:

845

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

846

.format(section))

847

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

848

client["extended_timeout"] = string_to_delta(

849

section["extended_timeout"])

850

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

851

client["approval_delay"] = string_to_delta(

852

section["approval_delay"])

853

client["approval_duration"] = string_to_delta(

854

section["approval_duration"])

855

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

856

client["last_approval_request"] = None

857

client["last_checked_ok"] = None

858

client["last_checker_status"] = -2

859

860

return settings

861

862

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

454

863

self.name = name

455

if config is None:

456

config = {}

864

if server_settings is None:

865

server_settings = {}

866

self.server_settings = server_settings

867

# adding all client settings

868

for setting, value in settings.items():

869

setattr(self, setting, value)

870

871

if self.enabled:

872

if not hasattr(self, "last_enabled"):

873

self.last_enabled = datetime.datetime.utcnow()

874

if not hasattr(self, "expires"):

875

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

876

+ self.timeout)

877

else:

878

self.last_enabled = None

879

self.expires = None

880

457

881

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

458

# Uppercase and remove spaces from fingerprint for later

459

# comparison purposes with return value from the fingerprint()

460

# function

461

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

462

.replace(" ", ""))

463

882

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

464

if "secret" in config:

465

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

466

elif "secfile" in config:

467

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

468

(config["secfile"])),

469

"rb") as secfile:

470

self.secret = secfile.read()

471

else:

472

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

473

% self.name)

474

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

475

self.created = datetime.datetime.utcnow()

476

self.enabled = True

477

self.last_approval_request = None

478

self.last_enabled = datetime.datetime.utcnow()

479

self.last_checked_ok = None

480

self.last_checker_status = None

481

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

482

self.extended_timeout = string_to_delta(config

483

["extended_timeout"])

484

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

883

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

884

datetime.datetime.utcnow())

885

886

# attributes specific for this server instance

485

887

self.checker = None

486

888

self.checker_initiator_tag = None

487

889

self.disable_initiator_tag = None

488

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

489

890

self.checker_callback_tag = None

490

self.checker_command = config["checker"]

491

891

self.current_checker_command = None

492

self._approved = None

493

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

494

True)

892

self.approved = None

495

893

self.approvals_pending = 0

496

self.approval_delay = string_to_delta(

497

config["approval_delay"])

498

self.approval_duration = string_to_delta(

499

config["approval_duration"])

500

self.changedstate = (multiprocessing_manager

501

.Condition(multiprocessing_manager

502

.Lock()))

503

self.client_structure = [attr for attr in

504

self.__dict__.iterkeys()

894

self.changedstate = multiprocessing_manager.Condition(

895

multiprocessing_manager.Lock())

896

self.client_structure = [attr

897

for attr in self.__dict__.keys()

505

898

if not attr.startswith("_")]

506

899

self.client_structure.append("client_structure")

507

900

508

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

509

lambda obj:

510

isinstance(obj,

511

property)):

901

for name, t in inspect.getmembers(

902

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

512

903

if not name.startswith("_"):

513

904

self.client_structure.append(name)

514

905

522

913

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

523

914

# Already enabled

524

915

return

525

self.send_changedstate()

526

916

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

527

917

self.enabled = True

528

918

self.last_enabled = datetime.datetime.utcnow()

529

919

self.init_checker()

920

self.send_changedstate()

530

921

531

922

def disable(self, quiet=True):

532

923

"""Disable this client."""

533

924

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

534

925

return False

535

926

if not quiet:

536

self.send_changedstate()

537

if not quiet:

538

927

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

539

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

540

gobject.source_remove(self.disable_initiator_tag)

928

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

929

GLib.source_remove(self.disable_initiator_tag)

541

930

self.disable_initiator_tag = None

542

931

self.expires = None

543

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

544

gobject.source_remove(self.checker_initiator_tag)

932

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

933

GLib.source_remove(self.checker_initiator_tag)

545

934

self.checker_initiator_tag = None

546

935

self.stop_checker()

547

936

self.enabled = False

548

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

937

if not quiet:

938

self.send_changedstate()

939

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

549

940

return False

550

941

551

942

def __del__(self):

554

945

def init_checker(self):

555

946

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

556

947

# and every interval from then on.

557

self.checker_initiator_tag = (gobject.timeout_add

558

(self.interval_milliseconds(),

559

self.start_checker))

948

if self.checker_initiator_tag is not None:

949

GLib.source_remove(self.checker_initiator_tag)

950

self.checker_initiator_tag = GLib.timeout_add(

951

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

952

self.start_checker)

560

953

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

561

self.disable_initiator_tag = (gobject.timeout_add

562

(self.timeout_milliseconds(),

563

self.disable))

954

if self.disable_initiator_tag is not None:

955

GLib.source_remove(self.disable_initiator_tag)

956

self.disable_initiator_tag = GLib.timeout_add(

957

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

564

958

# Also start a new checker *right now*.

565

959

self.start_checker()

566

960

567

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

961

def checker_callback(self, source, condition, connection,

962

command):

568

963

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

569

964

self.checker_callback_tag = None

570

965

self.checker = None

571

if os.WIFEXITED(condition):

572

self.last_checker_status = os.WEXITSTATUS(condition)

966

# Read return code from connection (see call_pipe)

967

returncode = connection.recv()

968

connection.close()

969

970

if returncode >= 0:

971

self.last_checker_status = returncode

972

self.last_checker_signal = None

573

973

if self.last_checker_status == 0:

574

974

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

575

975

vars(self))

576

976

self.checked_ok()

577

977

else:

578

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

579

vars(self))

978

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

580

979

else:

581

980

self.last_checker_status = -1

981

self.last_checker_signal = -returncode

582

982

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

583

983

vars(self))

584

585

def checked_ok(self, timeout=None):

586

"""Bump up the timeout for this client.

587

588

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

589

alive and well.

590

"""

984

return False

985

986

def checked_ok(self):

987

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

988

self.last_checked_ok = datetime.datetime.utcnow()

989

self.last_checker_status = 0

990

self.last_checker_signal = None

991

self.bump_timeout()

992

993

def bump_timeout(self, timeout=None):

994

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

591

995

if timeout is None:

592

996

timeout = self.timeout

593

self.last_checked_ok = datetime.datetime.utcnow()

594

997

if self.disable_initiator_tag is not None:

595

gobject.source_remove(self.disable_initiator_tag)

998

GLib.source_remove(self.disable_initiator_tag)

999

self.disable_initiator_tag = None

596

1000

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

597

self.disable_initiator_tag = (gobject.timeout_add

598

(_timedelta_to_milliseconds

599

(timeout), self.disable))

1001

self.disable_initiator_tag = GLib.timeout_add(

1002

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

600

1003

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

601

1004

602

1005

def need_approval(self):

608

1011

If a checker already exists, leave it running and do

609

1012

nothing."""

610

1013

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

611

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

612

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

613

# client would inevitably timeout, since no checker would get

614

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

1014

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

1015

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

1016

# would inevitably timeout, since no checker would get a

1017

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

615

1018

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

616

1019

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

617

1020

# should be.

618

1021

619

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

620

try:

621

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

622

except (AttributeError, OSError) as error:

623

if (isinstance(error, OSError)

624

and error.errno != errno.ECHILD):

625

raise error

626

else:

627

if pid:

628

logger.warning("Checker was a zombie")

629

gobject.source_remove(self.checker_callback_tag)

630

self.checker_callback(pid, status,

631

self.current_checker_command)

1022

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

1023

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

1024

self.checker.join()

1025

self.checker = None

632

1026

# Start a new checker if needed

633

1027

if self.checker is None:

1028

# Escape attributes for the shell

1029

escaped_attrs = {

1030

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

1031

for attr in self.runtime_expansions }

634

1032

try:

635

# In case checker_command has exactly one % operator

636

command = self.checker_command % self.host

637

except TypeError:

638

# Escape attributes for the shell

639

escaped_attrs = dict(

640

(attr,

641

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

642

errors=

643

'replace')))

644

for attr in

645

self.runtime_expansions)

646

647

try:

648

command = self.checker_command % escaped_attrs

649

except TypeError as error:

650

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

651

' %s', self.checker_command, error)

652

return True # Try again later

1033

command = self.checker_command % escaped_attrs

1034

except TypeError as error:

1035

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

1036

self.checker_command,

1037

exc_info=error)

1038

return True # Try again later

653

1039

self.current_checker_command = command

654

try:

655

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

656

command, self.name)

657

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

658

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

659

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

660

# always replaced by /dev/null.)

661

self.checker = subprocess.Popen(command,

662

close_fds=True,

663

shell=True, cwd="/")

664

self.checker_callback_tag = (gobject.child_watch_add

665

(self.checker.pid,

666

self.checker_callback,

667

data=command))

668

# The checker may have completed before the gobject

669

# watch was added. Check for this.

670

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

671

if pid:

672

gobject.source_remove(self.checker_callback_tag)

673

self.checker_callback(pid, status, command)

674

except OSError as error:

675

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

676

error)

677

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

1040

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

1041

self.name)

1042

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

1043

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

1044

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

1045

# always replaced by /dev/null.)

1046

# The exception is when not debugging but nevertheless

1047

# running in the foreground; use the previously

1048

# created wnull.

1049

popen_args = { "close_fds": True,

1050

"shell": True,

1051

"cwd": "/" }

1052

if (not self.server_settings["debug"]

1053

and self.server_settings["foreground"]):

1054

popen_args.update({"stdout": wnull,

1055

"stderr": wnull })

1056

pipe = multiprocessing.Pipe(duplex = False)

1057

self.checker = multiprocessing.Process(

1058

target = call_pipe,

1059

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

1060

kwargs = popen_args)

1061

self.checker.start()

1062

self.checker_callback_tag = GLib.io_add_watch(

1063

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

1064

self.checker_callback, pipe[0], command)

1065

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

678

1066

return True

679

1067

680

1068

def stop_checker(self):

681

1069

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

682

1070

if self.checker_callback_tag:

683

gobject.source_remove(self.checker_callback_tag)

1071

GLib.source_remove(self.checker_callback_tag)

684

1072

self.checker_callback_tag = None

685

1073

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

686

1074

return

687

1075

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

688

try:

689

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

690

#time.sleep(0.5)

691

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

692

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

693

except OSError as error:

694

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

695

raise

1076

self.checker.terminate()

696

1077

self.checker = None

697

1078

698

1079

699

def dbus_service_property(dbus_interface, signature="v",

700

access="readwrite", byte_arrays=False):

1080

def dbus_service_property(dbus_interface,

1081

signature="v",

1082

access="readwrite",

1083

byte_arrays=False):

701

1084

"""Decorators for marking methods of a DBusObjectWithProperties to

702

1085

become properties on the D-Bus.

703

1086

712

1095

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

713

1096

if byte_arrays and signature != "ay":

714

1097

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

715

" signature %r" % signature)

1098

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

1099

716

1100

def decorator(func):

717

1101

func._dbus_is_property = True

718

1102

func._dbus_interface = dbus_interface

723

1107

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

724

1108

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

725

1109

return func

1110

1111

return decorator

1112

1113

1114

def dbus_interface_annotations(dbus_interface):

1115

"""Decorator for marking functions returning interface annotations

1116

1117

Usage:

1118

1119

@dbus_interface_annotations("org.example.Interface")

1120

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

1121

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

1122

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

1123

"false"}

1124

"""

1125

1126

def decorator(func):

1127

func._dbus_is_interface = True

1128

func._dbus_interface = dbus_interface

1129

func._dbus_name = dbus_interface

1130

return func

1131

1132

return decorator

1133

1134

1135

def dbus_annotations(annotations):

1136

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

1137

Usage:

1138

1139

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

1140

"org.freedesktop.DBus.Property."

1141

"EmitsChangedSignal": "false"})

1142

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

1143

access="r")

1144

def Property_dbus_property(self):

1145

return dbus.Boolean(False)

1146

1147

See also the DBusObjectWithAnnotations class.

1148

"""

1149

1150

def decorator(func):

1151

func._dbus_annotations = annotations

1152

return func

1153

726

1154

return decorator

727

1155

728

1156

729

1157

class DBusPropertyException(dbus.exceptions.DBusException):

730

1158

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

731

1159

"""

732

def __unicode__(self):

733

return unicode(str(self))

1160

pass

734

1161

735

1162

736

1163

class DBusPropertyAccessException(DBusPropertyException):

745

1172

pass

746

1173

747

1174

748

class DBusObjectWithProperties(dbus.service.Object):

1175

class DBusObjectWithAnnotations(dbus.service.Object):

1176

"""A D-Bus object with annotations.

1177

1178

Classes inheriting from this can use the dbus_annotations

1179

decorator to add annotations to methods or signals.

1180

"""

1181

1182

@staticmethod

1183

def _is_dbus_thing(thing):

1184

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

1185

1186

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

1187

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

1188

"""

1189

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

1190

False)

1191

1192

def _get_all_dbus_things(self, thing):

1193

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

1194

"""

1195

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

1196

athing.__get__(self))

1197

for cls in self.__class__.__mro__

1198

for name, athing in

1199

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

1200

1201

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1202

out_signature = "s",

1203

path_keyword = 'object_path',

1204

connection_keyword = 'connection')

1205

def Introspect(self, object_path, connection):

1206

"""Overloading of standard D-Bus method.

1207

1208

Inserts annotation tags on methods and signals.

1209

"""

1210

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

1211

connection)

1212

try:

1213

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

1214

1215

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

1216

# Add annotation tags

1217

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

1218

for tag in if_tag.getElementsByTagName(typ):

1219

annots = dict()

1220

for name, prop in (self.

1221

_get_all_dbus_things(typ)):

1222

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

1223

and prop._dbus_interface

1224

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

1225

annots.update(getattr(

1226

prop, "_dbus_annotations", {}))

1227

for name, value in annots.items():

1228

ann_tag = document.createElement(

1229

"annotation")

1230

ann_tag.setAttribute("name", name)

1231

ann_tag.setAttribute("value", value)

1232

tag.appendChild(ann_tag)

1233

# Add interface annotation tags

1234

for annotation, value in dict(

1235

itertools.chain.from_iterable(

1236

annotations().items()

1237

for name, annotations

1238

in self._get_all_dbus_things("interface")

1239

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

1240

)).items():

1241

ann_tag = document.createElement("annotation")

1242

ann_tag.setAttribute("name", annotation)

1243

ann_tag.setAttribute("value", value)

1244

if_tag.appendChild(ann_tag)

1245

# Fix argument name for the Introspect method itself

1246

if (if_tag.getAttribute("name")

1247

== dbus.INTROSPECTABLE_IFACE):

1248

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

1249

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

1250

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

1251

if (arg.getAttribute("direction")

1252

== "out"):

1253

arg.setAttribute("name",

1254

"xml_data")

1255

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

1256

document.unlink()

1257

except (AttributeError, xml.dom.DOMException,

1258

xml.parsers.expat.ExpatError) as error:

1259

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

1260

exc_info=error)

1261

return xmlstring

1262

1263

1264

class DBusObjectWithProperties(DBusObjectWithAnnotations):

749

1265

"""A D-Bus object with properties.

750

1266

751

1267

Classes inheriting from this can use the dbus_service_property

753

1269

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

754

1270

"""

755

1271

756

@staticmethod

757

def _is_dbus_property(obj):

758

return getattr(obj, "_dbus_is_property", False)

759

760

def _get_all_dbus_properties(self):

761

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

762

"""

763

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

764

for cls in self.__class__.__mro__

765

for name, prop in

766

inspect.getmembers(cls, self._is_dbus_property))

767

768

1272

def _get_dbus_property(self, interface_name, property_name):

769

1273

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

770

1274

property with the specified name and interface.

771

1275

"""

772

for cls in self.__class__.__mro__:

773

for name, value in (inspect.getmembers

774

(cls, self._is_dbus_property)):

1276

for cls in self.__class__.__mro__:

1277

for name, value in inspect.getmembers(

1278

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

775

1279

if (value._dbus_name == property_name

776

1280

and value._dbus_interface == interface_name):

777

1281

return value.__get__(self)

778

1282

779

1283

# No such property

780

raise DBusPropertyNotFound(self.dbus_object_path + ":"

781

+ interface_name + "."

782

+ property_name)

783

784

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

1284

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

1285

self.dbus_object_path, interface_name, property_name))

1286

1287

@classmethod

1288

def _get_all_interface_names(cls):

1289

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

1290

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

1291

"_dbus_interface", None)

1292

for x in (inspect.getmro(cls))

1293

for attr in dir(x))

1294

if name is not None)

1295

1296

@dbus.service.method(dbus.PROPERTIES_IFACE,

1297

in_signature="ss",

785

1298

out_signature="v")

786

1299

def Get(self, interface_name, property_name):

787

1300

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

805

1318

# The byte_arrays option is not supported yet on

806

1319

# signatures other than "ay".

807

1320

if prop._dbus_signature != "ay":

808

raise ValueError

809

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

810

for byte in value))

1321

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

1322

"'ay' signature {!r}"

1323

.format(prop._dbus_signature))

1324

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

1325

for byte in value))

811

1326

prop(value)

812

1327

813

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

1328

@dbus.service.method(dbus.PROPERTIES_IFACE,

1329

in_signature="s",

814

1330

out_signature="a{sv}")

815

1331

def GetAll(self, interface_name):

816

1332

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

819

1335

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

820

1336

"""

821

1337

properties = {}

822

for name, prop in self._get_all_dbus_properties():

1338

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

823

1339

if (interface_name

824

1340

and interface_name != prop._dbus_interface):

825

1341

# Interface non-empty but did not match

831

1347

if not hasattr(value, "variant_level"):

832

1348

properties[name] = value

833

1349

continue

834

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

835

value.variant_level+1)

1350

properties[name] = type(value)(

1351

value, variant_level = value.variant_level + 1)

836

1352

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

837

1353

1354

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

1355

def PropertiesChanged(self, interface_name, changed_properties,

1356

invalidated_properties):

1357

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

1358

standard.

1359

"""

1360

pass

1361

838

1362

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

839

1363

out_signature="s",

840

1364

path_keyword='object_path',

841

1365

connection_keyword='connection')

842

1366

def Introspect(self, object_path, connection):

843

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

1367

"""Overloading of standard D-Bus method.

1368

1369

Inserts property tags and interface annotation tags.

844

1370

"""

845

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

846

connection)

1371

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1372

object_path,

1373

connection)

847

1374

try:

848

1375

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

1376

849

1377

def make_tag(document, name, prop):

850

1378

e = document.createElement("property")

851

1379

e.setAttribute("name", name)

852

1380

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

853

1381

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

854

1382

return e

1383

855

1384

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

1385

# Add property tags

856

1386

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

857

1387

for name, prop

858

in self._get_all_dbus_properties()

1388

in self._get_all_dbus_things("property")

859

1389

if prop._dbus_interface

860

1390

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

861

1391

if_tag.appendChild(tag)

1392

# Add annotation tags for properties

1393

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

1394

annots = dict()

1395

for name, prop in self._get_all_dbus_things(

1396

"property"):

1397

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

1398

and prop._dbus_interface

1399

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

1400

annots.update(getattr(

1401

prop, "_dbus_annotations", {}))

1402

for name, value in annots.items():

1403

ann_tag = document.createElement(

1404

"annotation")

1405

ann_tag.setAttribute("name", name)

1406

ann_tag.setAttribute("value", value)

1407

tag.appendChild(ann_tag)

862

1408

# Add the names to the return values for the

863

1409

# "org.freedesktop.DBus.Properties" methods

864

1410

if (if_tag.getAttribute("name")

879

1425

except (AttributeError, xml.dom.DOMException,

880

1426

xml.parsers.expat.ExpatError) as error:

881

1427

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

882

error)

883

return xmlstring

884

885

886

def datetime_to_dbus (dt, variant_level=0):

1428

exc_info=error)

1429

return xmlstring

1430

1431

try:

1432

dbus.OBJECT_MANAGER_IFACE

1433

except AttributeError:

1434

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

1435

1436

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1437

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

1438

1439

Classes inheriting from this exposes the standard

1440

GetManagedObjects call and the InterfacesAdded and

1441

InterfacesRemoved signals on the standard

1442

"org.freedesktop.DBus.ObjectManager" interface.

1443

1444

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

1445

manually.

1446

"""

1447

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1448

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

1449

def GetManagedObjects(self):

1450

"""This function must be overridden"""

1451

raise NotImplementedError()

1452

1453

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1454

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

1455

def InterfacesAdded(self, object_path, interfaces_and_properties):

1456

pass

1457

1458

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

1459

def InterfacesRemoved(self, object_path, interfaces):

1460

pass

1461

1462

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1463

out_signature = "s",

1464

path_keyword = 'object_path',

1465

connection_keyword = 'connection')

1466

def Introspect(self, object_path, connection):

1467

"""Overloading of standard D-Bus method.

1468

1469

Override return argument name of GetManagedObjects to be

1470

"objpath_interfaces_and_properties"

1471

"""

1472

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1473

object_path,

1474

connection)

1475

try:

1476

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

1477

1478

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

1479

# Fix argument name for the GetManagedObjects method

1480

if (if_tag.getAttribute("name")

1481

== dbus.OBJECT_MANAGER_IFACE):

1482

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

1483

if (cn.getAttribute("name")

1484

== "GetManagedObjects"):

1485

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

1486

if (arg.getAttribute("direction")

1487

== "out"):

1488

arg.setAttribute(

1489

"name",

1490

"objpath_interfaces"

1491

"_and_properties")

1492

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

1493

document.unlink()

1494

except (AttributeError, xml.dom.DOMException,

1495

xml.parsers.expat.ExpatError) as error:

1496

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

1497

exc_info = error)

1498

return xmlstring

1499

1500

def datetime_to_dbus(dt, variant_level=0):

887

1501

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

888

1502

if dt is None:

889

1503

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

890

return dbus.String(dt.isoformat(),

891

variant_level=variant_level)

892

893

894

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

895

.__metaclass__):

896

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

897

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

1504

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

1505

1506

1507

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1508

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

1509

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

1510

interface names according to the "alt_interface_names" mapping.

1511

Usage:

1512

1513

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

1514

"net.example.AlternateInterface"})

1515

class SampleDBusObject(dbus.service.Object):

1516

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

1517

def SampleDBusMethod():

1518

pass

1519

1520

The above "SampleDBusMethod" on "SampleDBusObject" will be

1521

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

1522

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

1523

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

1524

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

1525

1526

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

1527

(from DBusObjectWithProperties) and interfaces (from the

1528

dbus_interface_annotations decorator).

898

1529

"""

899

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

900

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

901

# methods, signals, or properties in them

902

for base in (b for b in bases

903

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

904

# Go though all attributes of the base class

905

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

1530

1531

def wrapper(cls):

1532

for orig_interface_name, alt_interface_name in (

1533

alt_interface_names.items()):

1534

attr = {}

1535

interface_names = set()

1536

# Go though all attributes of the class

1537

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

906

1538

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

907

1539

# with the wrong interface name

908

1540

if (not hasattr(attribute, "_dbus_interface")

909

or not attribute._dbus_interface

910

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

1541

or not attribute._dbus_interface.startswith(

1542

orig_interface_name)):

911

1543

continue

912

1544

# Create an alternate D-Bus interface name based on

913

1545

# the current name

914

alt_interface = (attribute._dbus_interface

915

.replace("se.recompile.Mandos",

916

"se.bsnet.fukt.Mandos"))

1546

alt_interface = attribute._dbus_interface.replace(

1547

orig_interface_name, alt_interface_name)

1548

interface_names.add(alt_interface)

917

1549

# Is this a D-Bus signal?

918

1550

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

919

# Extract the original non-method function by

920

# black magic

921

nonmethod_func = (dict(

1551

# Extract the original non-method undecorated

1552

# function by black magic

1553

if sys.version_info.major == 2:

1554

nonmethod_func = (dict(

922

1555

zip(attribute.func_code.co_freevars,

923

attribute.__closure__))["func"]

924

.cell_contents)

1556

attribute.__closure__))

1557

["func"].cell_contents)

1558

else:

1559

nonmethod_func = (dict(

1560

zip(attribute.__code__.co_freevars,

1561

attribute.__closure__))

1562

["func"].cell_contents)

925

1563

# Create a new, but exactly alike, function

926

1564

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

927

1565

# with the alternate D-Bus interface name

928

new_function = (dbus.service.signal

929

(alt_interface,

930

attribute._dbus_signature)

931

(types.FunctionType(

932

nonmethod_func.func_code,

933

nonmethod_func.func_globals,

934

nonmethod_func.func_name,

935

nonmethod_func.func_defaults,

936

nonmethod_func.func_closure)))

1566

new_function = copy_function(nonmethod_func)

1567

new_function = (dbus.service.signal(

1568

alt_interface,

1569

attribute._dbus_signature)(new_function))

1570

# Copy annotations, if any

1571

try:

1572

new_function._dbus_annotations = dict(

1573

attribute._dbus_annotations)

1574

except AttributeError:

1575

pass

937

1576

# Define a creator of a function to call both the

938

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

939

# signals gets sent when the function is called

1577

# original and alternate functions, so both the

1578

# original and alternate signals gets sent when

1579

# the function is called

940

1580

def fixscope(func1, func2):

941

1581

"""This function is a scope container to pass

942

1582

func1 and func2 to the "call_both" function

943

1583

outside of its arguments"""

1584

1585

@functools.wraps(func2)

944

1586

def call_both(*args, **kwargs):

945

1587

"""This function will emit two D-Bus

946

1588

signals by calling func1 and func2"""

947

1589

func1(*args, **kwargs)

948

1590

func2(*args, **kwargs)

1591

# Make wrapper function look like a D-Bus signal

1592

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

1593

if name.startswith("_dbus_"):

1594

setattr(call_both, name, attr)

1595

949

1596

return call_both

950

1597

# Create the "call_both" function and add it to

951

1598

# the class

952

attr[attrname] = fixscope(attribute,

953

new_function)

1599

attr[attrname] = fixscope(attribute, new_function)

954

1600

# Is this a D-Bus method?

955

1601

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

956

1602

# Create a new, but exactly alike, function

957

1603

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

958

1604

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

959

1605

# to the class.

960

attr[attrname] = (dbus.service.method

961

(alt_interface,

962

attribute._dbus_in_signature,

963

attribute._dbus_out_signature)

964

(types.FunctionType

965

(attribute.func_code,

966

attribute.func_globals,

967

attribute.func_name,

968

attribute.func_defaults,

969

attribute.func_closure)))

1606

attr[attrname] = (

1607

dbus.service.method(

1608

alt_interface,

1609

attribute._dbus_in_signature,

1610

attribute._dbus_out_signature)

1611

(copy_function(attribute)))

1612

# Copy annotations, if any

1613

try:

1614

attr[attrname]._dbus_annotations = dict(

1615

attribute._dbus_annotations)

1616

except AttributeError:

1617

pass

970

1618

# Is this a D-Bus property?

971

1619

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

972

1620

# Create a new, but exactly alike, function

973

1621

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

974

1622

# property with the alternate D-Bus interface

975

1623

# name. Add it to the class.

976

attr[attrname] = (dbus_service_property

977

(alt_interface,

978

attribute._dbus_signature,

979

attribute._dbus_access,

980

attribute

981

._dbus_get_args_options

982

["byte_arrays"])

983

(types.FunctionType

984

(attribute.func_code,

985

attribute.func_globals,

986

attribute.func_name,

987

attribute.func_defaults,

988

attribute.func_closure)))

989

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

990

991

1624

attr[attrname] = (dbus_service_property(

1625

alt_interface, attribute._dbus_signature,

1626

attribute._dbus_access,

1627

attribute._dbus_get_args_options

1628

["byte_arrays"])

1629

(copy_function(attribute)))

1630

# Copy annotations, if any

1631

try:

1632

attr[attrname]._dbus_annotations = dict(

1633

attribute._dbus_annotations)

1634

except AttributeError:

1635

pass

1636

# Is this a D-Bus interface?

1637

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

1638

# Create a new, but exactly alike, function

1639

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

1640

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

1641

# to the class.

1642

attr[attrname] = (

1643

dbus_interface_annotations(alt_interface)

1644

(copy_function(attribute)))

1645

if deprecate:

1646

# Deprecate all alternate interfaces

1647

iname="_AlternateDBusNames_interface_annotation{}"

1648

for interface_name in interface_names:

1649

1650

@dbus_interface_annotations(interface_name)

1651

def func(self):

1652

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

1653

"true" }

1654

# Find an unused name

1655

for aname in (iname.format(i)

1656

for i in itertools.count()):

1657

if aname not in attr:

1658

attr[aname] = func

1659

break

1660

if interface_names:

1661

# Replace the class with a new subclass of it with

1662

# methods, signals, etc. as created above.

1663

if sys.version_info.major == 2:

1664

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

1665

(cls, ), attr)

1666

else:

1667

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

1668

(cls, ), attr)

1669

return cls

1670

1671

return wrapper

1672

1673

1674

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

1675

"se.bsnet.fukt.Mandos"})

992

1676

class ClientDBus(Client, DBusObjectWithProperties):

993

1677

"""A Client class using D-Bus

994

1678

998

1682

"""

999

1683

1000

1684

runtime_expansions = (Client.runtime_expansions

1001

+ ("dbus_object_path",))

1685

+ ("dbus_object_path", ))

1686

1687

_interface = "se.recompile.Mandos.Client"

1002

1688

1003

1689

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

1004

1690

1005

1691

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

1006

1692

self.bus = bus

1007

1693

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

1008

1009

self._approvals_pending = 0

1010

1694

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

1011

1695

# the D-Bus

1012

client_object_name = unicode(self.name).translate(

1696

client_object_name = str(self.name).translate(

1013

1697

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

1014

1698

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

1015

self.dbus_object_path = (dbus.ObjectPath

1016

("/clients/" + client_object_name))

1699

self.dbus_object_path = dbus.ObjectPath(

1700

"/clients/" + client_object_name)

1017

1701

DBusObjectWithProperties.__init__(self, self.bus,

1018

1702

self.dbus_object_path)

1019

1020

def notifychangeproperty(transform_func,

1021

dbus_name, type_func=lambda x: x,

1022

variant_level=1):

1703

1704

def notifychangeproperty(transform_func, dbus_name,

1705

type_func=lambda x: x,

1706

variant_level=1,

1707

invalidate_only=False,

1708

_interface=_interface):

1023

1709

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

1024

1710

its changes to DBus.

1025

1711

1030

1716

to the D-Bus. Default: no transform

1031

1717

variant_level: D-Bus variant level. Default: 1

1032

1718

"""

1033

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

1719

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

1720

1034

1721

def setter(self, value):

1035

1722

if hasattr(self, "dbus_object_path"):

1036

1723

if (not hasattr(self, attrname) or

1037

1724

type_func(getattr(self, attrname, None))

1038

1725

!= type_func(value)):

1039

dbus_value = transform_func(type_func(value),

1040

variant_level

1041

=variant_level)

1042

self.PropertyChanged(dbus.String(dbus_name),

1043

dbus_value)

1726

if invalidate_only:

1727

self.PropertiesChanged(

1728

_interface, dbus.Dictionary(),

1729

dbus.Array((dbus_name, )))

1730

else:

1731

dbus_value = transform_func(

1732

type_func(value),

1733

variant_level = variant_level)

1734

self.PropertyChanged(dbus.String(dbus_name),

1735

dbus_value)

1736

self.PropertiesChanged(

1737

_interface,

1738

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

1739

dbus_value }),

1740

dbus.Array())

1044

1741

setattr(self, attrname, value)

1045

1742

1046

1743

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

1047

1744

1048

1049

1745

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1050

1746

approvals_pending = notifychangeproperty(dbus.Boolean,

1051

1747

"ApprovalPending",

1053

1749

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

1054

1750

last_enabled = notifychangeproperty(datetime_to_dbus,

1055

1751

"LastEnabled")

1056

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

1057

type_func = lambda checker:

1058

checker is not None)

1752

checker = notifychangeproperty(

1753

dbus.Boolean, "CheckerRunning",

1754

type_func = lambda checker: checker is not None)

1059

1755

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1060

1756

"LastCheckedOK")

1757

last_checker_status = notifychangeproperty(dbus.Int16,

1758

"LastCheckerStatus")

1061

1759

last_approval_request = notifychangeproperty(

1062

1760

datetime_to_dbus, "LastApprovalRequest")

1063

1761

approved_by_default = notifychangeproperty(dbus.Boolean,

1064

1762

"ApprovedByDefault")

1065

approval_delay = notifychangeproperty(dbus.UInt16,

1066

"ApprovalDelay",

1067

type_func =

1068

_timedelta_to_milliseconds)

1763

approval_delay = notifychangeproperty(

1764

dbus.UInt64, "ApprovalDelay",

1765

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

1069

1766

approval_duration = notifychangeproperty(

1070

dbus.UInt16, "ApprovalDuration",

1071

type_func = _timedelta_to_milliseconds)

1767

dbus.UInt64, "ApprovalDuration",

1768

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

1072

1769

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

1073

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

1074

type_func =

1075

_timedelta_to_milliseconds)

1770

timeout = notifychangeproperty(

1771

dbus.UInt64, "Timeout",

1772

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

1076

1773

extended_timeout = notifychangeproperty(

1077

dbus.UInt16, "ExtendedTimeout",

1078

type_func = _timedelta_to_milliseconds)

1079

interval = notifychangeproperty(dbus.UInt16,

1080

"Interval",

1081

type_func =

1082

_timedelta_to_milliseconds)

1774

dbus.UInt64, "ExtendedTimeout",

1775

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

1776

interval = notifychangeproperty(

1777

dbus.UInt64, "Interval",

1778

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

1083

1779

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

1780

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

1781

invalidate_only=True)

1084

1782

1085

1783

del notifychangeproperty

1086

1784

1093

1791

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

1094

1792

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

1095

1793

1096

def checker_callback(self, pid, condition, command,

1097

*args, **kwargs):

1098

self.checker_callback_tag = None

1099

self.checker = None

1100

if os.WIFEXITED(condition):

1101

exitstatus = os.WEXITSTATUS(condition)

1794

def checker_callback(self, source, condition,

1795

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

1796

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

1797

connection, command, *args,

1798

**kwargs)

1799

exitstatus = self.last_checker_status

1800

if exitstatus >= 0:

1102

1801

# Emit D-Bus signal

1103

1802

self.CheckerCompleted(dbus.Int16(exitstatus),

1104

dbus.Int64(condition),

1803

# This is specific to GNU libC

1804

dbus.Int64(exitstatus << 8),

1105

1805

dbus.String(command))

1106

1806

else:

1107

1807

# Emit D-Bus signal

1108

1808

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

1109

dbus.Int64(condition),

1809

dbus.Int64(

1810

# This is specific to GNU libC

1811

(exitstatus << 8)

1812

| self.last_checker_signal),

1110

1813

dbus.String(command))

1111

1112

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

1113

*args, **kwargs)

1814

return ret

1114

1815

1115

1816

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

1116

old_checker = self.checker

1117

if self.checker is not None:

1118

old_checker_pid = self.checker.pid

1119

else:

1120

old_checker_pid = None

1817

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

1121

1818

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

1122

1819

# Only if new checker process was started

1123

1820

if (self.checker is not None

1127

1824

return r

1128

1825

1129

1826

def _reset_approved(self):

1130

self._approved = None

1827

self.approved = None

1131

1828

return False

1132

1829

1133

1830

def approve(self, value=True):

1831

self.approved = value

1832

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

1833

* 1000), self._reset_approved)

1134

1834

self.send_changedstate()

1135

self._approved = value

1136

gobject.timeout_add(_timedelta_to_milliseconds

1137

(self.approval_duration),

1138

self._reset_approved)

1139

1140

1835

1141

1836

## D-Bus methods, signals & properties

1142

_interface = "se.recompile.Mandos.Client"

1837

1838

## Interfaces

1143

1839

1144

1840

## Signals

1145

1841

1156

1852

pass

1157

1853

1158

1854

# PropertyChanged - signal

1855

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

1159

1856

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

1160

1857

def PropertyChanged(self, property, value):

1161

1858

"D-Bus signal"

1182

1879

"D-Bus signal"

1183

1880

return self.need_approval()

1184

1881

1185

# NeRwequest - signal

1186

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

1187

def NewRequest(self, ip):

1188

"""D-Bus signal

1189

Is sent after a client request a password.

1190

"""

1191

pass

1192

1193

1882

## Methods

1194

1883

1195

1884

# Approve - method

1203

1892

self.checked_ok()

1204

1893

1205

1894

# Enable - method

1895

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

1206

1896

@dbus.service.method(_interface)

1207

1897

def Enable(self):

1208

1898

"D-Bus method"

1209

1899

self.enable()

1210

1900

1211

1901

# StartChecker - method

1902

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

1212

1903

@dbus.service.method(_interface)

1213

1904

def StartChecker(self):

1214

1905

"D-Bus method"

1215

1906

self.start_checker()

1216

1907

1217

1908

# Disable - method

1909

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

1218

1910

@dbus.service.method(_interface)

1219

1911

def Disable(self):

1220

1912

"D-Bus method"

1221

1913

self.disable()

1222

1914

1223

1915

# StopChecker - method

1916

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

1224

1917

@dbus.service.method(_interface)

1225

1918

def StopChecker(self):

1226

1919

self.stop_checker()

1233

1926

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

1234

1927

1235

1928

# ApprovedByDefault - property

1236

@dbus_service_property(_interface, signature="b",

1929

@dbus_service_property(_interface,

1930

signature="b",

1237

1931

access="readwrite")

1238

1932

def ApprovedByDefault_dbus_property(self, value=None):

1239

1933

if value is None: # get

1241

1935

self.approved_by_default = bool(value)

1242

1936

1243

1937

# ApprovalDelay - property

1244

@dbus_service_property(_interface, signature="t",

1938

@dbus_service_property(_interface,

1939

signature="t",

1245

1940

access="readwrite")

1246

1941

def ApprovalDelay_dbus_property(self, value=None):

1247

1942

if value is None: # get

1248

return dbus.UInt64(self.approval_delay_milliseconds())

1943

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

1944

* 1000)

1249

1945

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

1250

1946

1251

1947

# ApprovalDuration - property

1252

@dbus_service_property(_interface, signature="t",

1948

@dbus_service_property(_interface,

1949

signature="t",

1253

1950

access="readwrite")

1254

1951

def ApprovalDuration_dbus_property(self, value=None):

1255

1952

if value is None: # get

1256

return dbus.UInt64(_timedelta_to_milliseconds(

1257

self.approval_duration))

1953

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

1954

* 1000)

1258

1955

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

1259

1956

1260

1957

# Name - property

1958

@dbus_annotations(

1959

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

1261

1960

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

1262

1961

def Name_dbus_property(self):

1263

1962

return dbus.String(self.name)

1264

1963

1265

1964

# Fingerprint - property

1965

@dbus_annotations(

1966

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

1266

1967

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

1267

1968

def Fingerprint_dbus_property(self):

1268

1969

return dbus.String(self.fingerprint)

1269

1970

1270

1971

# Host - property

1271

@dbus_service_property(_interface, signature="s",

1972

@dbus_service_property(_interface,

1973

signature="s",

1272

1974

access="readwrite")

1273

1975

def Host_dbus_property(self, value=None):

1274

1976

if value is None: # get

1275

1977

return dbus.String(self.host)

1276

self.host = value

1978

self.host = str(value)

1277

1979

1278

1980

# Created - property

1981

@dbus_annotations(

1982

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

1279

1983

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

1280

1984

def Created_dbus_property(self):

1281

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

1985

return datetime_to_dbus(self.created)

1282

1986

1283

1987

# LastEnabled - property

1284

1988

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

1286

1990

return datetime_to_dbus(self.last_enabled)

1287

1991

1288

1992

# Enabled - property

1289

@dbus_service_property(_interface, signature="b",

1993

@dbus_service_property(_interface,

1994

signature="b",

1290

1995

access="readwrite")

1291

1996

def Enabled_dbus_property(self, value=None):

1292

1997

if value is None: # get

1297

2002

self.disable()

1298

2003

1299

2004

# LastCheckedOK - property

1300

@dbus_service_property(_interface, signature="s",

2005

@dbus_service_property(_interface,

2006

signature="s",

1301

2007

access="readwrite")

1302

2008

def LastCheckedOK_dbus_property(self, value=None):

1303

2009

if value is not None:

1305

2011

return

1306

2012

return datetime_to_dbus(self.last_checked_ok)

1307

2013

2014

# LastCheckerStatus - property

2015

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

2016

def LastCheckerStatus_dbus_property(self):

2017

return dbus.Int16(self.last_checker_status)

2018

1308

2019

# Expires - property

1309

2020

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

1310

2021

def Expires_dbus_property(self):

1316

2027

return datetime_to_dbus(self.last_approval_request)

1317

2028

1318

2029

# Timeout - property

1319

@dbus_service_property(_interface, signature="t",

2030

@dbus_service_property(_interface,

2031

signature="t",

1320

2032

access="readwrite")

1321

2033

def Timeout_dbus_property(self, value=None):

1322

2034

if value is None: # get

1323

return dbus.UInt64(self.timeout_milliseconds())

2035

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

2036

old_timeout = self.timeout

1324

2037

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

1325

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

1326

return

1327

# Reschedule timeout

1328

gobject.source_remove(self.disable_initiator_tag)

1329

self.disable_initiator_tag = None

1330

self.expires = None

1331

time_to_die = _timedelta_to_milliseconds((self

1332

.last_checked_ok

1333

+ self.timeout)

1334

- datetime.datetime

1335

.utcnow())

1336

if time_to_die <= 0:

1337

# The timeout has passed

1338

self.disable()

1339

else:

1340

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

1341

+ datetime.timedelta(milliseconds =

1342

time_to_die))

1343

self.disable_initiator_tag = (gobject.timeout_add

1344

(time_to_die, self.disable))

2038

# Reschedule disabling

2039

if self.enabled:

2040

now = datetime.datetime.utcnow()

2041

self.expires += self.timeout - old_timeout

2042

if self.expires <= now:

2043

# The timeout has passed

2044

self.disable()

2045

else:

2046

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

2047

is None):

2048

return

2049

GLib.source_remove(self.disable_initiator_tag)

2050

self.disable_initiator_tag = GLib.timeout_add(

2051

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

2052

self.disable)

1345

2053

1346

2054

# ExtendedTimeout - property

1347

@dbus_service_property(_interface, signature="t",

2055

@dbus_service_property(_interface,

2056

signature="t",

1348

2057

access="readwrite")

1349

2058

def ExtendedTimeout_dbus_property(self, value=None):

1350

2059

if value is None: # get

1351

return dbus.UInt64(self.extended_timeout_milliseconds())

2060

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

2061

* 1000)

1352

2062

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

1353

2063

1354

2064

# Interval - property

1355

@dbus_service_property(_interface, signature="t",

2065

@dbus_service_property(_interface,

2066

signature="t",

1356

2067

access="readwrite")

1357

2068

def Interval_dbus_property(self, value=None):

1358

2069

if value is None: # get

1359

return dbus.UInt64(self.interval_milliseconds())

2070

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

1360

2071

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

1361

2072

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

1362

2073

return

1363

# Reschedule checker run

1364

gobject.source_remove(self.checker_initiator_tag)

1365

self.checker_initiator_tag = (gobject.timeout_add

1366

(value, self.start_checker))

1367

self.start_checker() # Start one now, too

2074

if self.enabled:

2075

# Reschedule checker run

2076

GLib.source_remove(self.checker_initiator_tag)

2077

self.checker_initiator_tag = GLib.timeout_add(

2078

value, self.start_checker)

2079

self.start_checker() # Start one now, too

1368

2080

1369

2081

# Checker - property

1370

@dbus_service_property(_interface, signature="s",

2082

@dbus_service_property(_interface,

2083

signature="s",

1371

2084

access="readwrite")

1372

2085

def Checker_dbus_property(self, value=None):

1373

2086

if value is None: # get

1374

2087

return dbus.String(self.checker_command)

1375

self.checker_command = value

2088

self.checker_command = str(value)

1376

2089

1377

2090

# CheckerRunning - property

1378

@dbus_service_property(_interface, signature="b",

2091

@dbus_service_property(_interface,

2092

signature="b",

1379

2093

access="readwrite")

1380

2094

def CheckerRunning_dbus_property(self, value=None):

1381

2095

if value is None: # get

1386

2100

self.stop_checker()

1387

2101

1388

2102

# ObjectPath - property

2103

@dbus_annotations(

2104

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

2105

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

1389

2106

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

1390

2107

def ObjectPath_dbus_property(self):

1391

2108

return self.dbus_object_path # is already a dbus.ObjectPath

1392

2109

1393

2110

# Secret = property

1394

@dbus_service_property(_interface, signature="ay",

1395

access="write", byte_arrays=True)

2111

@dbus_annotations(

2112

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

2113

"invalidates"})

2114

@dbus_service_property(_interface,

2115

signature="ay",

2116

access="write",

2117

byte_arrays=True)

1396

2118

def Secret_dbus_property(self, value):

1397

self.secret = str(value)

2119

self.secret = bytes(value)

1398

2120

1399

2121

del _interface

1400

2122

1404

2126

self._pipe = child_pipe

1405

2127

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

1406

2128

if not self._pipe.recv():

1407

raise KeyError()

2129

raise KeyError(fpr)

1408

2130

1409

2131

def __getattribute__(self, name):

1410

if(name == '_pipe'):

2132

if name == '_pipe':

1411

2133

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

1412

2134

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

1413

2135

data = self._pipe.recv()

1414

2136

if data[0] == 'data':

1415

2137

return data[1]

1416

2138

if data[0] == 'function':

2139

1417

2140

def func(*args, **kwargs):

1418

2141

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

1419

2142

return self._pipe.recv()[1]

2143

1420

2144

return func

1421

2145

1422

2146

def __setattr__(self, name, value):

1423

if(name == '_pipe'):

2147

if name == '_pipe':

1424

2148

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

1425

2149

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

1426

2150

1427

2151

1428

class ClientDBusTransitional(ClientDBus):

1429

__metaclass__ = AlternateDBusNamesMetaclass

1430

1431

1432

2152

class ClientHandler(socketserver.BaseRequestHandler, object):

1433

2153

"""A class to handle client connections.

1434

2154

1438

2158

def handle(self):

1439

2159

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

1440

2160

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

1441

unicode(self.client_address))

2161

str(self.client_address))

1442

2162

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

1443

2163

self.server.child_pipe.fileno())

1444

2164

1445

session = (gnutls.connection

1446

.ClientSession(self.request,

1447

gnutls.connection

1448

.X509Credentials()))

1449

1450

# Note: gnutls.connection.X509Credentials is really a

1451

# generic GnuTLS certificate credentials object so long as

1452

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

1453

# here despite using OpenPGP certificates.

2165

session = gnutls.ClientSession(self.request)

1454

2166

1455

2167

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

1456

2168

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

1460

2172

priority = self.server.gnutls_priority

1461

2173

if priority is None:

1462

2174

priority = "NORMAL"

1463

(gnutls.library.functions

1464

.gnutls_priority_set_direct(session._c_object,

1465

priority, None))

2175

gnutls.priority_set_direct(session._c_object, priority,

2176

None)

1466

2177

1467

2178

# Start communication using the Mandos protocol

1468

2179

# Get protocol number

1470

2181

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

1471

2182

try:

1472

2183

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

1473

raise RuntimeError

2184

raise RuntimeError(line)

1474

2185

except (ValueError, IndexError, RuntimeError) as error:

1475

2186

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

1476

2187

return

1478

2189

# Start GnuTLS connection

1479

2190

try:

1480

2191

session.handshake()

1481

except gnutls.errors.GNUTLSError as error:

2192

except gnutls.Error as error:

1482

2193

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

1483

2194

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

1484

2195

# established. Just abandon the request.

1488

2199

approval_required = False

1489

2200

try:

1490

2201

try:

1491

fpr = self.fingerprint(self.peer_certificate

1492

(session))

1493

except (TypeError,

1494

gnutls.errors.GNUTLSError) as error:

2202

fpr = self.fingerprint(

2203

self.peer_certificate(session))

2204

except (TypeError, gnutls.Error) as error:

1495

2205

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

1496

2206

return

1497

2207

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

1498

if self.server.use_dbus:

1499

# Emit D-Bus signal

1500

client.NewRequest(str(self.client_address))

1501

2208

1502

2209

try:

1503

2210

client = ProxyClient(child_pipe, fpr,

1513

2220

while True:

1514

2221

if not client.enabled:

1515

2222

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

1516

client.name)

2223

client.name)

1517

2224

if self.server.use_dbus:

1518

2225

# Emit D-Bus signal

1519

2226

client.Rejected("Disabled")

1520

2227

return

1521

2228

1522

if client._approved or not client.approval_delay:

2229

if client.approved or not client.approval_delay:

1523

2230

#We are approved or approval is disabled

1524

2231

break

1525

elif client._approved is None:

2232

elif client.approved is None:

1526

2233

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

1527

2234

client.name)

1528

2235

if self.server.use_dbus:

1529

2236

# Emit D-Bus signal

1530

2237

client.NeedApproval(

1531

client.approval_delay_milliseconds(),

1532

client.approved_by_default)

2238

client.approval_delay.total_seconds()

2239

* 1000, client.approved_by_default)

1533

2240

else:

1534

2241

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

1535

2242

client.name)

1541

2248

#wait until timeout or approved

1542

2249

time = datetime.datetime.now()

1543

2250

client.changedstate.acquire()

1544

(client.changedstate.wait

1545

(float(client._timedelta_to_milliseconds(delay)

1546

/ 1000)))

2251

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

1547

2252

client.changedstate.release()

1548

2253

time2 = datetime.datetime.now()

1549

2254

if (time2 - time) >= delay:

1560

2265

else:

1561

2266

delay -= time2 - time

1562

2267

1563

sent_size = 0

1564

while sent_size < len(client.secret):

1565

try:

1566

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

1567

except gnutls.errors.GNUTLSError as error:

1568

logger.warning("gnutls send failed")

1569

return

1570

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

1571

sent, len(client.secret)

1572

- (sent_size + sent))

1573

sent_size += sent

2268

try:

2269

session.send(client.secret)

2270

except gnutls.Error as error:

2271

logger.warning("gnutls send failed",

2272

exc_info = error)

2273

return

1574

2274

1575

2275

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

1576

2276

# bump the timeout using extended_timeout

1577

client.checked_ok(client.extended_timeout)

2277

client.bump_timeout(client.extended_timeout)

1578

2278

if self.server.use_dbus:

1579

2279

# Emit D-Bus signal

1580

2280

client.GotSecret()

1584

2284

client.approvals_pending -= 1

1585

2285

try:

1586

2286

session.bye()

1587

except gnutls.errors.GNUTLSError as error:

1588

logger.warning("GnuTLS bye failed")

2287

except gnutls.Error as error:

2288

logger.warning("GnuTLS bye failed",

2289

exc_info=error)

1589

2290

1590

2291

@staticmethod

1591

2292

def peer_certificate(session):

1592

2293

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

1593

2294

# If not an OpenPGP certificate...

1594

if (gnutls.library.functions

1595

.gnutls_certificate_type_get(session._c_object)

1596

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1597

# ...do the normal thing

1598

return session.peer_certificate

2295

if (gnutls.certificate_type_get(session._c_object)

2296

!= gnutls.CRT_OPENPGP):

2297

# ...return invalid data

2298

return b""

1599

2299

list_size = ctypes.c_uint(1)

1600

cert_list = (gnutls.library.functions

1601

.gnutls_certificate_get_peers

2300

cert_list = (gnutls.certificate_get_peers

1602

2301

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

1603

2302

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

1604

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

1605

" certificate")

2303

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

1606

2304

if list_size.value == 0:

1607

2305

return None

1608

2306

cert = cert_list[0]

1612

2310

def fingerprint(openpgp):

1613

2311

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1614

2312

# New GnuTLS "datum" with the OpenPGP public key

1615

datum = (gnutls.library.types

1616

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

1617

ctypes.POINTER

1618

(ctypes.c_ubyte)),

1619

ctypes.c_uint(len(openpgp))))

2313

datum = gnutls.datum_t(

2314

ctypes.cast(ctypes.c_char_p(openpgp),

2315

ctypes.POINTER(ctypes.c_ubyte)),

2316

ctypes.c_uint(len(openpgp)))

1620

2317

# New empty GnuTLS certificate

1621

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1622

(gnutls.library.functions

1623

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2318

crt = gnutls.openpgp_crt_t()

2319

gnutls.openpgp_crt_init(ctypes.byref(crt))

1624

2320

# Import the OpenPGP public key into the certificate

1625

(gnutls.library.functions

1626

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

1627

gnutls.library.constants

1628

.GNUTLS_OPENPGP_FMT_RAW))

2321

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

2322

gnutls.OPENPGP_FMT_RAW)

1629

2323

# Verify the self signature in the key

1630

2324

crtverify = ctypes.c_uint()

1631

(gnutls.library.functions

1632

.gnutls_openpgp_crt_verify_self(crt, 0,

1633

ctypes.byref(crtverify)))

2325

gnutls.openpgp_crt_verify_self(crt, 0,

2326

ctypes.byref(crtverify))

1634

2327

if crtverify.value != 0:

1635

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1636

raise (gnutls.errors.CertificateSecurityError

1637

("Verify failed"))

2328

gnutls.openpgp_crt_deinit(crt)

2329

raise gnutls.CertificateSecurityError("Verify failed")

1638

2330

# New buffer for the fingerprint

1639

2331

buf = ctypes.create_string_buffer(20)

1640

2332

buf_len = ctypes.c_size_t()

1641

2333

# Get the fingerprint from the certificate into the buffer

1642

(gnutls.library.functions

1643

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

1644

ctypes.byref(buf_len)))

2334

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

2335

ctypes.byref(buf_len))

1645

2336

# Deinit the certificate

1646

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2337

gnutls.openpgp_crt_deinit(crt)

1647

2338

# Convert the buffer to a Python bytestring

1648

2339

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

1649

2340

# Convert the bytestring to hexadecimal notation

1653

2344

1654

2345

class MultiprocessingMixIn(object):

1655

2346

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

2347

1656

2348

def sub_process_main(self, request, address):

1657

2349

try:

1658

2350

self.finish_request(request, address)

1659

except:

2351

except Exception:

1660

2352

self.handle_error(request, address)

1661

2353

self.close_request(request)

1662

2354

1663

2355

def process_request(self, request, address):

1664

2356

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

1665

2357

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

1666

args = (request,

1667

address))

2358

args = (request, address))

1668

2359

proc.start()

1669

2360

return proc

1670

2361

1671

2362

1672

2363

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1673

2364

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

2365

1674

2366

def process_request(self, request, client_address):

1675

2367

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

1676

2368

1685

2377

1686

2378

def add_pipe(self, parent_pipe, proc):

1687

2379

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

1688

raise NotImplementedError

2380

raise NotImplementedError()

1689

2381

1690

2382

1691

2383

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1697

2389

interface: None or a network interface name (string)

1698

2390

use_ipv6: Boolean; to use IPv6 or not

1699

2391

"""

2392

1700

2393

def __init__(self, server_address, RequestHandlerClass,

1701

interface=None, use_ipv6=True):

2394

interface=None,

2395

use_ipv6=True,

2396

socketfd=None):

2397

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

2398

creating a new one with socket.socket().

2399

"""

1702

2400

self.interface = interface

1703

2401

if use_ipv6:

1704

2402

self.address_family = socket.AF_INET6

2403

if socketfd is not None:

2404

# Save the file descriptor

2405

self.socketfd = socketfd

2406

# Save the original socket.socket() function

2407

self.socket_socket = socket.socket

2408

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

2409

#

2410

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

2411

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

2412

# patching socket.socket.)

2413

#

2414

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

2415

@functools.wraps(socket.socket)

2416

def socket_wrapper(*args, **kwargs):

2417

# Restore original function so subsequent calls are

2418

# not affected.

2419

socket.socket = self.socket_socket

2420

del self.socket_socket

2421

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

2422

# saved file descriptor.

2423

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

2424

# Replace socket.socket() function with wrapper

2425

socket.socket = socket_wrapper

2426

# The socketserver.TCPServer.__init__ will call

2427

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

2428

# socket_wrapper(), if socketfd was set.

1705

2429

socketserver.TCPServer.__init__(self, server_address,

1706

2430

RequestHandlerClass)

2431

1707

2432

def server_bind(self):

1708

2433

"""This overrides the normal server_bind() function

1709

2434

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

1715

2440

self.interface)

1716

2441

else:

1717

2442

try:

1718

self.socket.setsockopt(socket.SOL_SOCKET,

1719

SO_BINDTODEVICE,

1720

str(self.interface

1721

+ '\0'))

2443

self.socket.setsockopt(

2444

socket.SOL_SOCKET, SO_BINDTODEVICE,

2445

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

1722

2446

except socket.error as error:

1723

if error[0] == errno.EPERM:

1724

logger.error("No permission to"

1725

" bind to interface %s",

1726

self.interface)

1727

elif error[0] == errno.ENOPROTOOPT:

2447

if error.errno == errno.EPERM:

2448

logger.error("No permission to bind to"

2449

" interface %s", self.interface)

2450

elif error.errno == errno.ENOPROTOOPT:

1728

2451

logger.error("SO_BINDTODEVICE not available;"

1729

2452

" cannot bind to interface %s",

1730

2453

self.interface)

2454

elif error.errno == errno.ENODEV:

2455

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

2456

" cannot bind", self.interface)

1731

2457

else:

1732

2458

raise

1733

2459

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

1736

2462

if self.address_family == socket.AF_INET6:

1737

2463

any_address = "::" # in6addr_any

1738

2464

else:

1739

any_address = socket.INADDR_ANY

2465

any_address = "0.0.0.0" # INADDR_ANY

1740

2466

self.server_address = (any_address,

1741

2467

self.server_address[1])

1742

2468

elif not self.server_address[1]:

1743

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

1744

0)

2469

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

1745

2470

# if self.interface:

1746

2471

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

1747

2472

# 0, # port

1759

2484

gnutls_priority GnuTLS priority string

1760

2485

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

1761

2486

1762

Assumes a gobject.MainLoop event loop.

2487

Assumes a GLib.MainLoop event loop.

1763

2488

"""

2489

1764

2490

def __init__(self, server_address, RequestHandlerClass,

1765

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

1766

gnutls_priority=None, use_dbus=True):

2491

interface=None,

2492

use_ipv6=True,

2493

clients=None,

2494

gnutls_priority=None,

2495

use_dbus=True,

2496

socketfd=None):

1767

2497

self.enabled = False

1768

2498

self.clients = clients

1769

2499

if self.clients is None:

1773

2503

IPv6_TCPServer.__init__(self, server_address,

1774

2504

RequestHandlerClass,

1775

2505

interface = interface,

1776

use_ipv6 = use_ipv6)

2506

use_ipv6 = use_ipv6,

2507

socketfd = socketfd)

2508

1777

2509

def server_activate(self):

1778

2510

if self.enabled:

1779

2511

return socketserver.TCPServer.server_activate(self)

1783

2515

1784

2516

def add_pipe(self, parent_pipe, proc):

1785

2517

# Call "handle_ipc" for both data and EOF events

1786

gobject.io_add_watch(parent_pipe.fileno(),

1787

gobject.IO_IN | gobject.IO_HUP,

1788

functools.partial(self.handle_ipc,

1789

parent_pipe =

1790

parent_pipe,

1791

proc = proc))

2518

GLib.io_add_watch(

2519

parent_pipe.fileno(),

2520

GLib.IO_IN | GLib.IO_HUP,

2521

functools.partial(self.handle_ipc,

2522

parent_pipe = parent_pipe,

2523

proc = proc))

1792

2524

1793

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

1794

proc = None, client_object=None):

1795

condition_names = {

1796

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

1797

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

1798

# blocking).

1799

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

1800

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

1801

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

1802

# broken, usually for pipes and

1803

# sockets).

1804

}

1805

conditions_string = ' | '.join(name

1806

for cond, name in

1807

condition_names.iteritems()

1808

if cond & condition)

2525

def handle_ipc(self, source, condition,

2526

parent_pipe=None,

2527

proc = None,

2528

client_object=None):

1809

2529

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

1810

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

2530

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

1811

2531

# Wait for other process to exit

1812

2532

proc.join()

1813

2533

return False

1820

2540

fpr = request[1]

1821

2541

address = request[2]

1822

2542

1823

for c in self.clients.itervalues():

2543

for c in self.clients.values():

1824

2544

if c.fingerprint == fpr:

1825

2545

client = c

1826

2546

break

1834

2554

parent_pipe.send(False)

1835

2555

return False

1836

2556

1837

gobject.io_add_watch(parent_pipe.fileno(),

1838

gobject.IO_IN | gobject.IO_HUP,

1839

functools.partial(self.handle_ipc,

1840

parent_pipe =

1841

parent_pipe,

1842

proc = proc,

1843

client_object =

1844

client))

2557

GLib.io_add_watch(

2558

parent_pipe.fileno(),

2559

GLib.IO_IN | GLib.IO_HUP,

2560

functools.partial(self.handle_ipc,

2561

parent_pipe = parent_pipe,

2562

proc = proc,

2563

client_object = client))

1845

2564

parent_pipe.send(True)

1846

2565

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

1847

2566

# same fileno

1853

2572

1854

2573

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

1855

2574

funcname)(*args,

1856

**kwargs)))

2575

**kwargs)))

1857

2576

1858

2577

if command == 'getattr':

1859

2578

attrname = request[1]

1860

if callable(client_object.__getattribute__(attrname)):

1861

parent_pipe.send(('function',))

2579

if isinstance(client_object.__getattribute__(attrname),

2580

collections.Callable):

2581

parent_pipe.send(('function', ))

1862

2582

else:

1863

parent_pipe.send(('data', client_object

1864

.__getattribute__(attrname)))

2583

parent_pipe.send((

2584

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

1865

2585

1866

2586

if command == 'setattr':

1867

2587

attrname = request[1]

1871

2591

return True

1872

2592

1873

2593

2594

def rfc3339_duration_to_delta(duration):

2595

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

2596

2597

>>> rfc3339_duration_to_delta("P7D")

2598

datetime.timedelta(7)

2599

>>> rfc3339_duration_to_delta("PT60S")

2600

datetime.timedelta(0, 60)

2601

>>> rfc3339_duration_to_delta("PT60M")

2602

datetime.timedelta(0, 3600)

2603

>>> rfc3339_duration_to_delta("PT24H")

2604

datetime.timedelta(1)

2605

>>> rfc3339_duration_to_delta("P1W")

2606

datetime.timedelta(7)

2607

>>> rfc3339_duration_to_delta("PT5M30S")

2608

datetime.timedelta(0, 330)

2609

>>> rfc3339_duration_to_delta("P1DT3M20S")

2610

datetime.timedelta(1, 200)

2611

"""

2612

2613

# Parsing an RFC 3339 duration with regular expressions is not

2614

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

2615

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

2616

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

2617

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

2618

# avoid excessive use of external libraries.

2619

2620

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

2621

Token = collections.namedtuple("Token", (

2622

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

2623

# a "group" containing digits

2624

"value", # datetime.timedelta or None

2625

"followers")) # Tokens valid after this token

2626

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

2627

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

2628

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

2629

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

2630

datetime.timedelta(seconds=1),

2631

frozenset((token_end, )))

2632

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

2633

datetime.timedelta(minutes=1),

2634

frozenset((token_second, token_end)))

2635

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

2636

datetime.timedelta(hours=1),

2637

frozenset((token_minute, token_end)))

2638

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

2639

None,

2640

frozenset((token_hour, token_minute,

2641

token_second)))

2642

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

2643

datetime.timedelta(days=1),

2644

frozenset((token_time, token_end)))

2645

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

2646

datetime.timedelta(weeks=4),

2647

frozenset((token_day, token_end)))

2648

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

2649

datetime.timedelta(weeks=52),

2650

frozenset((token_month, token_end)))

2651

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

2652

datetime.timedelta(weeks=1),

2653

frozenset((token_end, )))

2654

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

2655

frozenset((token_year, token_month,

2656

token_day, token_time,

2657

token_week)))

2658

# Define starting values

2659

value = datetime.timedelta() # Value so far

2660

found_token = None

2661

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

2662

s = duration # String left to parse

2663

# Loop until end token is found

2664

while found_token is not token_end:

2665

# Search for any currently valid tokens

2666

for token in followers:

2667

match = token.regexp.match(s)

2668

if match is not None:

2669

# Token found

2670

if token.value is not None:

2671

# Value found, parse digits

2672

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

2673

# Add to value so far

2674

value += factor * token.value

2675

# Strip token from string

2676

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

2677

# Go to found token

2678

found_token = token

2679

# Set valid next tokens

2680

followers = found_token.followers

2681

break

2682

else:

2683

# No currently valid tokens were found

2684

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

2685

.format(duration))

2686

# End token found

2687

return value

2688

2689

1874

2690

def string_to_delta(interval):

1875

2691

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

1876

2692

1887

2703

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

1888

2704

datetime.timedelta(0, 330)

1889

2705

"""

2706

2707

try:

2708

return rfc3339_duration_to_delta(interval)

2709

except ValueError:

2710

pass

2711

1890

2712

timevalue = datetime.timedelta(0)

1891

2713

for s in interval.split():

1892

2714

try:

1893

suffix = unicode(s[-1])

2715

suffix = s[-1]

1894

2716

value = int(s[:-1])

1895

2717

if suffix == "d":

1896

2718

delta = datetime.timedelta(value)

1903

2725

elif suffix == "w":

1904

2726

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

1905

2727

else:

1906

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

1907

except (ValueError, IndexError) as e:

2728

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

2729

except IndexError as e:

1908

2730

raise ValueError(*(e.args))

1909

2731

timevalue += delta

1910

2732

return timevalue

1923

2745

sys.exit()

1924

2746

if not noclose:

1925

2747

# Close all standard open file descriptors

1926

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

2748

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

1927

2749

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

1928

2750

raise OSError(errno.ENODEV,

1929

"%s not a character device"

1930

% os.path.devnull)

2751

"{} not a character device"

2752

.format(os.devnull))

1931

2753

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

1932

2754

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

1933

2755

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

1942

2764

1943

2765

parser = argparse.ArgumentParser()

1944

2766

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

1945

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

2767

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

1946

2768

help="show version number and exit")

1947

2769

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

1948

2770

help="Bind to interface IF")

1954

2776

help="Run self-test")

1955

2777

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

1956

2778

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

1957

" to terminal")

2779

" to terminal", default=None)

1958

2780

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

1959

2781

help="Debug level for stdout output")

1960

2782

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

1967

2789

" files")

1968

2790

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

1969

2791

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

1970

" system bus interface")

2792

" system bus interface", default=None)

1971

2793

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

1972

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

2794

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

2795

default=None)

1973

2796

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

1974

2797

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

1975

" state")

2798

" state", default=None)

2799

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

2800

help="Specify a file descriptor to a network"

2801

" socket to use instead of creating one")

1976

2802

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

1977

2803

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

2804

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

2805

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

2806

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

2807

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

2808

default=None)

1978

2809

1979

2810

options = parser.parse_args()

1980

2811

1981

2812

if options.check:

1982

2813

import doctest

1983

doctest.testmod()

1984

sys.exit()

2814

fail_count, test_count = doctest.testmod()

2815

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

1985

2816

1986

2817

# Default values for config file for server-global settings

1987

2818

server_defaults = { "interface": "",

1989

2820

"port": "",

1990

2821

"debug": "False",

1991

2822

"priority":

1992

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

2823

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

2824

":+SIGN-DSA-SHA256",

1993

2825

"servicename": "Mandos",

1994

2826

"use_dbus": "True",

1995

2827

"use_ipv6": "True",

1996

2828

"debuglevel": "",

1997

2829

"restore": "True",

1998

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

1999

}

2830

"socket": "",

2831

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

2832

"foreground": "False",

2833

"zeroconf": "True",

2834

}

2000

2835

2001

2836

# Parse config file for server-global settings

2002

2837

server_config = configparser.SafeConfigParser(server_defaults)

2003

2838

del server_defaults

2004

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

2005

"mandos.conf"))

2839

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

2006

2840

# Convert the SafeConfigParser object to a dict

2007

2841

server_settings = server_config.defaults()

2008

2842

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

2009

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

2843

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

2010

2844

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

2011

2845

option)

2012

2846

if server_settings["port"]:

2013

2847

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

2014

2848

"port")

2849

if server_settings["socket"]:

2850

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

2851

"socket")

2852

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

2853

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

2854

# happen with a supplied network socket.

2855

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

2856

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

2857

["socket"])

2015

2858

del server_config

2016

2859

2017

2860

# Override the settings from the config file with command line

2018

2861

# options, if set.

2019

2862

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

2020

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

2021

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

2022

"statedir"):

2863

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

2864

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

2865

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

2023

2866

value = getattr(options, option)

2024

2867

if value is not None:

2025

2868

server_settings[option] = value

2026

2869

del options

2027

2870

# Force all strings to be unicode

2028

2871

for option in server_settings.keys():

2029

if type(server_settings[option]) is str:

2030

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

2872

if isinstance(server_settings[option], bytes):

2873

server_settings[option] = (server_settings[option]

2874

.decode("utf-8"))

2875

# Force all boolean options to be boolean

2876

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

2877

"foreground", "zeroconf"):

2878

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

2879

# Debug implies foreground

2880

if server_settings["debug"]:

2881

server_settings["foreground"] = True

2031

2882

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

2032

2883

2033

2884

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

2034

2885

2886

if (not server_settings["zeroconf"]

2887

and not (server_settings["port"]

2888

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

2889

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

2890

2035

2891

# For convenience

2036

2892

debug = server_settings["debug"]

2037

2893

debuglevel = server_settings["debuglevel"]

2039

2895

use_ipv6 = server_settings["use_ipv6"]

2040

2896

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

2041

2897

stored_state_file)

2898

foreground = server_settings["foreground"]

2899

zeroconf = server_settings["zeroconf"]

2042

2900

2043

2901

if debug:

2044

initlogger(logging.DEBUG)

2902

initlogger(debug, logging.DEBUG)

2045

2903

else:

2046

2904

if not debuglevel:

2047

initlogger()

2905

initlogger(debug)

2048

2906

else:

2049

2907

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

2050

initlogger(level)

2908

initlogger(debug, level)

2051

2909

2052

2910

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

2053

syslogger.setFormatter(logging.Formatter

2054

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

2055

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

2056

% server_settings["servicename"]))

2911

syslogger.setFormatter(

2912

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

2913

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

2914

server_settings["servicename"])))

2057

2915

2058

2916

# Parse config file with clients

2059

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

2060

"extended_timeout": "15m",

2061

"interval": "2m",

2062

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

2063

"host": "",

2064

"approval_delay": "0s",

2065

"approval_duration": "1s",

2066

}

2067

client_config = configparser.SafeConfigParser(client_defaults)

2917

client_config = configparser.SafeConfigParser(Client

2918

.client_defaults)

2068

2919

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

2069

2920

"clients.conf"))

2070

2921

2071

2922

global mandos_dbus_service

2072

2923

mandos_dbus_service = None

2073

2924

2074

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

2075

server_settings["port"]),

2076

ClientHandler,

2077

interface=(server_settings["interface"]

2078

or None),

2079

use_ipv6=use_ipv6,

2080

gnutls_priority=

2081

server_settings["priority"],

2082

use_dbus=use_dbus)

2083

if not debug:

2084

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

2925

socketfd = None

2926

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

2927

socketfd = server_settings["socket"]

2928

tcp_server = MandosServer(

2929

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

2930

ClientHandler,

2931

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

2932

use_ipv6=use_ipv6,

2933

gnutls_priority=server_settings["priority"],

2934

use_dbus=use_dbus,

2935

socketfd=socketfd)

2936

if not foreground:

2937

pidfilename = "/run/mandos.pid"

2938

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

2939

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

2940

pidfile = None

2085

2941

try:

2086

pidfile = open(pidfilename, "w")

2087

except IOError:

2088

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

2942

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

2943

except IOError as e:

2944

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

2945

exc_info=e)

2089

2946

2090

try:

2091

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

2092

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

2093

except KeyError:

2947

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

2948

("mandos", "mandos"),

2949

("nobody", "nogroup")):

2094

2950

try:

2095

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

2096

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

2951

uid = pwd.getpwnam(name).pw_uid

2952

gid = pwd.getpwnam(group).pw_gid

2953

break

2097

2954

except KeyError:

2098

try:

2099

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

2100

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

2101

except KeyError:

2102

uid = 65534

2103

gid = 65534

2955

continue

2956

else:

2957

uid = 65534

2958

gid = 65534

2104

2959

try:

2105

2960

os.setgid(gid)

2106

2961

os.setuid(uid)

2962

if debug:

2963

logger.debug("Did setuid/setgid to {}:{}".format(uid,

2964

gid))

2107

2965

except OSError as error:

2108

if error[0] != errno.EPERM:

2109

raise error

2966

logger.warning("Failed to setuid/setgid to {}:{}: {}"

2967

.format(uid, gid, os.strerror(error.errno)))

2968

if error.errno != errno.EPERM:

2969

raise

2110

2970

2111

2971

if debug:

2112

2972

# Enable all possible GnuTLS debugging

2113

2973

2114

2974

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

2115

2975

# - GnuTLS manual

2116

gnutls.library.functions.gnutls_global_set_log_level(11)

2976

gnutls.global_set_log_level(11)

2117

2977

2118

@gnutls.library.types.gnutls_log_func

2978

@gnutls.log_func

2119

2979

def debug_gnutls(level, string):

2120

2980

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

2121

2981

2122

(gnutls.library.functions

2123

.gnutls_global_set_log_function(debug_gnutls))

2982

gnutls.global_set_log_function(debug_gnutls)

2124

2983

2125

2984

# Redirect stdin so all checkers get /dev/null

2126

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

2985

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

2127

2986

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

2128

2987

if null > 2:

2129

2988

os.close(null)

2130

else:

2131

# No console logging

2132

logger.removeHandler(console)

2133

2989

2134

2990

# Need to fork before connecting to D-Bus

2135

if not debug:

2991

if not foreground:

2136

2992

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

2137

2993

daemon()

2138

2994

2995

# multiprocessing will use threads, so before we use GLib we need

2996

# to inform GLib that threads will be used.

2997

GLib.threads_init()

2998

2139

2999

global main_loop

2140

3000

# From the Avahi example code

2141

DBusGMainLoop(set_as_default=True )

2142

main_loop = gobject.MainLoop()

3001

DBusGMainLoop(set_as_default=True)

3002

main_loop = GLib.MainLoop()

2143

3003

bus = dbus.SystemBus()

2144

3004

# End of Avahi example code

2145

3005

if use_dbus:

2146

3006

try:

2147

3007

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

2148

bus, do_not_queue=True)

2149

old_bus_name = (dbus.service.BusName

2150

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

2151

do_not_queue=True))

2152

except dbus.exceptions.NameExistsException as e:

2153

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

3008

bus,

3009

do_not_queue=True)

3010

old_bus_name = dbus.service.BusName(

3011

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

3012

do_not_queue=True)

3013

except dbus.exceptions.DBusException as e:

3014

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

2154

3015

use_dbus = False

2155

3016

server_settings["use_dbus"] = False

2156

3017

tcp_server.use_dbus = False

2157

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2158

service = AvahiServiceToSyslog(name =

2159

server_settings["servicename"],

2160

servicetype = "_mandos._tcp",

2161

protocol = protocol, bus = bus)

2162

if server_settings["interface"]:

2163

service.interface = (if_nametoindex

2164

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

3018

if zeroconf:

3019

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3020

service = AvahiServiceToSyslog(

3021

name = server_settings["servicename"],

3022

servicetype = "_mandos._tcp",

3023

protocol = protocol,

3024

bus = bus)

3025

if server_settings["interface"]:

3026

service.interface = if_nametoindex(

3027

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

2165

3028

2166

3029

global multiprocessing_manager

2167

3030

multiprocessing_manager = multiprocessing.Manager()

2168

3031

2169

3032

client_class = Client

2170

3033

if use_dbus:

2171

client_class = functools.partial(ClientDBusTransitional,

2172

bus = bus)

2173

2174

special_settings = {

2175

# Some settings need to be accessd by special methods;

2176

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

2177

"approved_by_default":

2178

lambda section:

2179

client_config.getboolean(section, "approved_by_default"),

2180

}

2181

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

2182

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

2183

# with exceptions for any special settings as defined above

2184

client_settings = dict((clientname,

2185

dict((setting,

2186

(value

2187

if setting not in special_settings

2188

else special_settings[setting]

2189

(clientname)))

2190

for setting, value in

2191

client_config.items(clientname)))

2192

for clientname in client_config.sections())

2193

3034

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

3035

3036

client_settings = Client.config_parser(client_config)

2194

3037

old_client_settings = {}

2195

clients_data = []

3038

clients_data = {}

3039

3040

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

3041

global wnull

3042

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

3043

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

3044

# mode

3045

if debug or not foreground:

3046

wnull.close()

2196

3047

2197

3048

# Get client data and settings from last running state.

2198

3049

if server_settings["restore"]:

2199

3050

try:

2200

3051

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

2201

clients_data, old_client_settings = (pickle.load

2202

(stored_state))

3052

if sys.version_info.major == 2:

3053

clients_data, old_client_settings = pickle.load(

3054

stored_state)

3055

else:

3056

bytes_clients_data, bytes_old_client_settings = (

3057

pickle.load(stored_state, encoding = "bytes"))

3058

### Fix bytes to strings

3059

## clients_data

3060

# .keys()

3061

clients_data = { (key.decode("utf-8")

3062

if isinstance(key, bytes)

3063

else key): value

3064

for key, value in

3065

bytes_clients_data.items() }

3066

del bytes_clients_data

3067

for key in clients_data:

3068

value = { (k.decode("utf-8")

3069

if isinstance(k, bytes) else k): v

3070

for k, v in

3071

clients_data[key].items() }

3072

clients_data[key] = value

3073

# .client_structure

3074

value["client_structure"] = [

3075

(s.decode("utf-8")

3076

if isinstance(s, bytes)

3077

else s) for s in

3078

value["client_structure"] ]

3079

# .name & .host

3080

for k in ("name", "host"):

3081

if isinstance(value[k], bytes):

3082

value[k] = value[k].decode("utf-8")

3083

## old_client_settings

3084

# .keys()

3085

old_client_settings = {

3086

(key.decode("utf-8")

3087

if isinstance(key, bytes)

3088

else key): value

3089

for key, value in

3090

bytes_old_client_settings.items() }

3091

del bytes_old_client_settings

3092

# .host

3093

for value in old_client_settings.values():

3094

if isinstance(value["host"], bytes):

3095

value["host"] = (value["host"]

3096

.decode("utf-8"))

2203

3097

os.remove(stored_state_path)

2204

3098

except IOError as e:

2205

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

2206

.format(e))

2207

if e.errno != errno.ENOENT:

3099

if e.errno == errno.ENOENT:

3100

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

3101

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

3102

else:

3103

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

3104

exc_info=e)

2208

3105

raise

3106

except EOFError as e:

3107

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

3108

"EOFError:",

3109

exc_info=e)

2209

3110

2210

with Crypto() as crypt:

2211

for client in clients_data:

2212

client_name = client["name"]

3111

with PGPEngine() as pgp:

3112

for client_name, client in clients_data.items():

3113

# Skip removed clients

3114

if client_name not in client_settings:

3115

continue

2213

3116

2214

3117

# Decide which value to use after restoring saved state.

2215

3118

# We have three different values: Old config file,

2221

3124

# For each value in new config, check if it

2222

3125

# differs from the old config value (Except for

2223

3126

# the "secret" attribute)

2224

if (name != "secret" and

2225

value != old_client_settings[client_name]

2226

[name]):

2227

setattr(client, name, value)

3127

if (name != "secret"

3128

and (value !=

3129

old_client_settings[client_name][name])):

3130

client[name] = value

2228

3131

except KeyError:

2229

3132

pass

2230

3133

2231

3134

# Clients who has passed its expire date can still be

2232

# enabled if its last checker was sucessful. Clients

2233

# whose checker failed before we stored its state is

2234

# assumed to have failed all checkers during downtime.

2235

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

2236

if ((datetime.datetime.utcnow()

2237

- client["last_checked_ok"])

2238

> client["interval"]):

2239

if client["last_checker_status"] != 0:

3135

# enabled if its last checker was successful. A Client

3136

# whose checker succeeded before we stored its state is

3137

# assumed to have successfully run all checkers during

3138

# downtime.

3139

if client["enabled"]:

3140

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

3141

if not client["last_checked_ok"]:

3142

logger.warning(

3143

"disabling client {} - Client never "

3144

"performed a successful checker".format(

3145

client_name))

3146

client["enabled"] = False

3147

elif client["last_checker_status"] != 0:

3148

logger.warning(

3149

"disabling client {} - Client last"

3150

" checker failed with error code"

3151

" {}".format(

3152

client_name,

3153

client["last_checker_status"]))

2240

3154

client["enabled"] = False

2241

3155

else:

2242

client["expires"] = (datetime.datetime

2243

.utcnow()

2244

+ client["timeout"])

2245

2246

client["changedstate"] = (multiprocessing_manager

2247

.Condition

2248

(multiprocessing_manager

2249

.Lock()))

2250

if use_dbus:

2251

new_client = (ClientDBusTransitional.__new__

2252

(ClientDBusTransitional))

2253

tcp_server.clients[client_name] = new_client

2254

new_client.bus = bus

2255

for name, value in client.iteritems():

2256

setattr(new_client, name, value)

2257

client_object_name = unicode(client_name).translate(

2258

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

2259

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

2260

new_client.dbus_object_path = (dbus.ObjectPath

2261

("/clients/"

2262

+ client_object_name))

2263

DBusObjectWithProperties.__init__(new_client,

2264

new_client.bus,

2265

new_client

2266

.dbus_object_path)

2267

else:

2268

tcp_server.clients[client_name] = (Client.__new__

2269

(Client))

2270

for name, value in client.iteritems():

2271

setattr(tcp_server.clients[client_name],

2272

name, value)

2273

3156

client["expires"] = (

3157

datetime.datetime.utcnow()

3158

+ client["timeout"])

3159

logger.debug("Last checker succeeded,"

3160

" keeping {} enabled".format(

3161

client_name))

2274

3162

try:

2275

tcp_server.clients[client_name].secret = (

2276

crypt.decrypt(tcp_server.clients[client_name]

2277

.encrypted_secret,

2278

client_settings[client_name]

2279

["secret"]))

2280

except CryptoError:

3163

client["secret"] = pgp.decrypt(

3164

client["encrypted_secret"],

3165

client_settings[client_name]["secret"])

3166

except PGPError:

2281

3167

# If decryption fails, we use secret from new settings

2282

tcp_server.clients[client_name].secret = (

2283

client_settings[client_name]["secret"])

2284

2285

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

2286

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

2287

del tcp_server.clients[clientname]

2288

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

2289

tcp_server.clients[clientname] = (client_class(name

2290

= clientname,

2291

config =

2292

client_settings

2293

[clientname]))

3168

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

3169

client_name))

3170

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

3171

["secret"])

3172

3173

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

3174

for client_name in (set(old_client_settings)

3175

- set(client_settings)):

3176

del clients_data[client_name]

3177

for client_name in (set(client_settings)

3178

- set(old_client_settings)):

3179

clients_data[client_name] = client_settings[client_name]

3180

3181

# Create all client objects

3182

for client_name, client in clients_data.items():

3183

tcp_server.clients[client_name] = client_class(

3184

name = client_name,

3185

settings = client,

3186

server_settings = server_settings)

2294

3187

2295

3188

if not tcp_server.clients:

2296

3189

logger.warning("No clients defined")

2297

2298

if not debug:

2299

try:

2300

with pidfile:

2301

pid = os.getpid()

2302

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

2303

del pidfile

2304

except IOError:

2305

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

2306

pidfilename, pid)

2307

except NameError:

2308

# "pidfile" was never created

2309

pass

3190

3191

if not foreground:

3192

if pidfile is not None:

3193

pid = os.getpid()

3194

try:

3195

with pidfile:

3196

print(pid, file=pidfile)

3197

except IOError:

3198

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

3199

pidfilename, pid)

3200

del pidfile

2310

3201

del pidfilename

3202

3203

for termsig in (signal.SIGHUP, signal.SIGTERM):

3204

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3205

lambda: main_loop.quit() and False)

3206

3207

if use_dbus:

2311

3208

2312

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

2313

2314

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

2315

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

2316

2317

if use_dbus:

2318

class MandosDBusService(dbus.service.Object):

3209

@alternate_dbus_interfaces(

3210

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

3211

class MandosDBusService(DBusObjectWithObjectManager):

2319

3212

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

3213

2320

3214

def __init__(self):

2321

3215

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

3216

2322

3217

_interface = "se.recompile.Mandos"

2323

3218

2324

3219

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

2331

3226

"D-Bus signal"

2332

3227

pass

2333

3228

3229

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

3230

"true"})

2334

3231

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

2335

3232

def ClientRemoved(self, objpath, name):

2336

3233

"D-Bus signal"

2337

3234

pass

2338

3235

3236

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

3237

"true"})

2339

3238

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

2340

3239

def GetAllClients(self):

2341

3240

"D-Bus method"

2342

return dbus.Array(c.dbus_object_path

2343

for c in

2344

tcp_server.clients.itervalues())

3241

return dbus.Array(c.dbus_object_path for c in

3242

tcp_server.clients.values())

2345

3243

3244

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

3245

"true"})

2346

3246

@dbus.service.method(_interface,

2347

3247

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

2348

3248

def GetAllClientsWithProperties(self):

2349

3249

"D-Bus method"

2350

3250

return dbus.Dictionary(

2351

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

2352

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

3251

{ c.dbus_object_path: c.GetAll(

3252

"se.recompile.Mandos.Client")

3253

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

2353

3254

signature="oa{sv}")

2354

3255

2355

3256

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

2356

3257

def RemoveClient(self, object_path):

2357

3258

"D-Bus method"

2358

for c in tcp_server.clients.itervalues():

3259

for c in tcp_server.clients.values():

2359

3260

if c.dbus_object_path == object_path:

2360

3261

del tcp_server.clients[c.name]

2361

3262

c.remove_from_connection()

2362

# Don't signal anything except ClientRemoved

3263

# Don't signal the disabling

2363

3264

c.disable(quiet=True)

2364

# Emit D-Bus signal

2365

self.ClientRemoved(object_path, c.name)

3265

# Emit D-Bus signal for removal

3266

self.client_removed_signal(c)

2366

3267

return

2367

3268

raise KeyError(object_path)

2368

3269

2369

3270

del _interface

3271

3272

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3273

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

3274

def GetManagedObjects(self):

3275

"""D-Bus method"""

3276

return dbus.Dictionary(

3277

{ client.dbus_object_path:

3278

dbus.Dictionary(

3279

{ interface: client.GetAll(interface)

3280

for interface in

3281

client._get_all_interface_names()})

3282

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

3283

3284

def client_added_signal(self, client):

3285

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

3286

if use_dbus:

3287

# New standard signal

3288

self.InterfacesAdded(

3289

client.dbus_object_path,

3290

dbus.Dictionary(

3291

{ interface: client.GetAll(interface)

3292

for interface in

3293

client._get_all_interface_names()}))

3294

# Old signal

3295

self.ClientAdded(client.dbus_object_path)

3296

3297

def client_removed_signal(self, client):

3298

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

3299

if use_dbus:

3300

# New standard signal

3301

self.InterfacesRemoved(

3302

client.dbus_object_path,

3303

client._get_all_interface_names())

3304

# Old signal

3305

self.ClientRemoved(client.dbus_object_path,

3306

client.name)

2370

3307

2371

class MandosDBusServiceTransitional(MandosDBusService):

2372

__metaclass__ = AlternateDBusNamesMetaclass

2373

mandos_dbus_service = MandosDBusServiceTransitional()

3308

mandos_dbus_service = MandosDBusService()

2374

3309

2375

3310

def cleanup():

2376

3311

"Cleanup function; run on exit"

2377

service.cleanup()

3312

if zeroconf:

3313

service.cleanup()

2378

3314

2379

3315

multiprocessing.active_children()

3316

wnull.close()

2380

3317

if not (tcp_server.clients or client_settings):

2381

3318

return

2382

3319

2383

3320

# Store client before exiting. Secrets are encrypted with key

2384

3321

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

2385

3322

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

2386

clients = []

2387

with Crypto() as crypt:

2388

for client in tcp_server.clients.itervalues():

3323

clients = {}

3324

with PGPEngine() as pgp:

3325

for client in tcp_server.clients.values():

2389

3326

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

2390

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

2391

key)

3327

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

3328

key)

2392

3329

client_dict = {}

2393

3330

2394

# A list of attributes that will not be stored when

2395

# shutting down.

2396

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

2397

for name, typ in (inspect.getmembers

2398

(dbus.service.Object)):

3331

# A list of attributes that can not be pickled

3332

# + secret.

3333

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

3334

"checker", "server_settings" }

3335

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

3336

.Object):

2399

3337

exclude.add(name)

2400

3338

2401

3339

client_dict["encrypted_secret"] = (client

2404

3342

if attr not in exclude:

2405

3343

client_dict[attr] = getattr(client, attr)

2406

3344

2407

clients.append(client_dict)

3345

clients[client.name] = client_dict

2408

3346

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

2409

3347

2410

3348

try:

2411

with os.fdopen(os.open(stored_state_path,

2412

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

2413

0600), "wb") as stored_state:

2414

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

3349

with tempfile.NamedTemporaryFile(

3350

mode='wb',

3351

suffix=".pickle",

3352

prefix='clients-',

3353

dir=os.path.dirname(stored_state_path),

3354

delete=False) as stored_state:

3355

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

3356

protocol = 2)

3357

tempname = stored_state.name

3358

os.rename(tempname, stored_state_path)

2415

3359

except (IOError, OSError) as e:

2416

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

2417

.format(e))

2418

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

3360

if not debug:

3361

try:

3362

os.remove(tempname)

3363

except NameError:

3364

pass

3365

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

3366

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

3367

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

3368

else:

3369

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

3370

exc_info=e)

2419

3371

raise

2420

3372

2421

3373

# Delete all clients, and settings from config

2423

3375

name, client = tcp_server.clients.popitem()

2424

3376

if use_dbus:

2425

3377

client.remove_from_connection()

2426

# Don't signal anything except ClientRemoved

3378

# Don't signal the disabling

2427

3379

client.disable(quiet=True)

3380

# Emit D-Bus signal for removal

2428

3381

if use_dbus:

2429

# Emit D-Bus signal

2430

mandos_dbus_service.ClientRemoved(client

2431

.dbus_object_path,

2432

client.name)

3382

mandos_dbus_service.client_removed_signal(client)

2433

3383

client_settings.clear()

2434

3384

2435

3385

atexit.register(cleanup)

2436

3386

2437

for client in tcp_server.clients.itervalues():

3387

for client in tcp_server.clients.values():

2438

3388

if use_dbus:

2439

# Emit D-Bus signal

2440

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3389

# Emit D-Bus signal for adding

3390

mandos_dbus_service.client_added_signal(client)

2441

3391

# Need to initiate checking of clients

2442

3392

if client.enabled:

2443

3393

client.init_checker()

2446

3396

tcp_server.server_activate()

2447

3397

2448

3398

# Find out what port we got

2449

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

3399

if zeroconf:

3400

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

2450

3401

if use_ipv6:

2451

3402

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

2452

" flowinfo %d, scope_id %d"

2453

% tcp_server.socket.getsockname())

3403

" flowinfo %d, scope_id %d",

3404

*tcp_server.socket.getsockname())

2454

3405

else: # IPv4

2455

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

2456

% tcp_server.socket.getsockname())

3406

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

3407

*tcp_server.socket.getsockname())

2457

3408

2458

3409

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

2459

3410

2460

3411

try:

2461

# From the Avahi example code

2462

try:

2463

service.activate()

2464

except dbus.exceptions.DBusException as error:

2465

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

2466

cleanup()

2467

sys.exit(1)

2468

# End of Avahi example code

3412

if zeroconf:

3413

# From the Avahi example code

3414

try:

3415

service.activate()

3416

except dbus.exceptions.DBusException as error:

3417

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

3418

cleanup()

3419

sys.exit(1)

3420

# End of Avahi example code

2469

3421

2470

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

2471

lambda *args, **kwargs:

2472

(tcp_server.handle_request

2473

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

3422

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

3423

lambda *args, **kwargs:

3424

(tcp_server.handle_request

3425

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

2474

3426

2475

3427

logger.debug("Starting main loop")

2476

3428

main_loop.run()

2477

3429

except AvahiError as error:

2478

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

3430

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

2479

3431

cleanup()

2480

3432

sys.exit(1)

2481

3433

except KeyboardInterrupt: