/mandos/trunk : revision 830

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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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version = "1.4.1"

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.5"

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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 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 PGPError(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 PGPError(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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341

self.entry_group_state_changed_match = None

262

def rename(self):

342

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def rename(self, remove=True):

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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

347

" after %i retries, exiting.",

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self.rename_count)

268

349

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

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354

self.name)

273

self.remove()

355

if remove:

356

self.remove()

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try:

275

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self.add()

276

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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

281

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

377

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,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

342

avahi.SERVER_FAILURE:

343

"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

434

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

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

413

774

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

414

775

last_checker_status: integer between 0 and 255 reflecting exit

415

776

status of last checker. -1 reflects crashed

416

checker, or None.

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

417

780

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

418

781

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

419

782

D-Bus identifiers

420

783

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

421

784

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

422

785

until this client is disabled

423

extended_timeout: extra long timeout when password has been sent

786

extended_timeout: extra long timeout when secret has been sent

424

787

runtime_expansions: Allowed attributes for runtime expansion.

425

788

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

426

789

disabled, or None

790

server_settings: The server_settings dict from main()

427

791

"""

428

792

429

793

runtime_expansions = ("approval_delay", "approval_duration",

430

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

431

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

794

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

795

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

796

"last_approval_request", "last_checked_ok",

432

797

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

433

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

434

"extended_timeout": "15m",

435

"interval": "2m",

436

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

437

"host": "",

438

"approval_delay": "0s",

439

"approval_duration": "1s",

440

"approved_by_default": "True",

441

"enabled": "True",

442

}

443

444

def timeout_milliseconds(self):

445

"Return the 'timeout' attribute in milliseconds"

446

return timedelta_to_milliseconds(self.timeout)

447

448

def extended_timeout_milliseconds(self):

449

"Return the 'extended_timeout' attribute in milliseconds"

450

return timedelta_to_milliseconds(self.extended_timeout)

451

452

def interval_milliseconds(self):

453

"Return the 'interval' attribute in milliseconds"

454

return timedelta_to_milliseconds(self.interval)

455

456

def approval_delay_milliseconds(self):

457

return timedelta_to_milliseconds(self.approval_delay)

458

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

459

810

@staticmethod

460

811

def config_parser(config):

461

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

812

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

462

813

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

463

with exceptions for any special settings as defined above"""

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

"""

464

818

settings = {}

465

819

for client_name in config.sections():

466

820

section = dict(config.items(client_name))

470

824

# Reformat values from string types to Python types

471

825

client["approved_by_default"] = config.getboolean(

472

826

client_name, "approved_by_default")

473

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

827

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

828

"enabled")

474

829

830

# Uppercase and remove spaces from fingerprint for later

831

# comparison purposes with return value from the

832

# fingerprint() function

475

833

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

476

834

.replace(" ", ""))

477

835

if "secret" in section:

478

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

836

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

837

.encode("utf-8"),

838

"base64")

479

839

elif "secfile" in section:

480

840

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

481

841

(section["secfile"])),

482

842

"rb") as secfile:

483

843

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

484

844

else:

485

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

486

% section)

845

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

846

.format(section))

487

847

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

488

848

client["extended_timeout"] = string_to_delta(

489

849

section["extended_timeout"])

495

855

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

496

856

client["last_approval_request"] = None

497

857

client["last_checked_ok"] = None

498

client["last_checker_status"] = None

499

if client["enabled"]:

500

client["last_enabled"] = datetime.datetime.utcnow()

501

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

502

+ client["timeout"])

503

else:

504

client["last_enabled"] = None

505

client["expires"] = None

506

858

client["last_checker_status"] = -2

859

507

860

return settings

508

509

510

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

511

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

512

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

513

attribute."""

861

862

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

514

863

self.name = name

864

if server_settings is None:

865

server_settings = {}

866

self.server_settings = server_settings

515

867

# adding all client settings

516

for setting, value in settings.iteritems():

868

for setting, value in settings.items():

517

869

setattr(self, setting, value)

518

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

519

881

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

520

# Uppercase and remove spaces from fingerprint for later

521

# comparison purposes with return value from the fingerprint()

522

# function

523

882

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

524

self.created = settings.get("created", datetime.datetime.utcnow())

525

883

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

884

datetime.datetime.utcnow())

885

526

886

# attributes specific for this server instance

527

887

self.checker = None

528

888

self.checker_initiator_tag = None

531

891

self.current_checker_command = None

532

892

self.approved = None

533

893

self.approvals_pending = 0

534

self.changedstate = (multiprocessing_manager

535

.Condition(multiprocessing_manager

536

.Lock()))

537

self.client_structure = [attr for attr in

538

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()

539

898

if not attr.startswith("_")]

540

899

self.client_structure.append("client_structure")

541

900

542

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

543

lambda obj:

544

isinstance(obj,

545

property)):

901

for name, t in inspect.getmembers(

902

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

546

903

if not name.startswith("_"):

547

904

self.client_structure.append(name)

548

905

556

913

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

557

914

# Already enabled

558

915

return

559

self.send_changedstate()

560

916

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

561

917

self.enabled = True

562

918

self.last_enabled = datetime.datetime.utcnow()

563

919

self.init_checker()

920

self.send_changedstate()

564

921

565

922

def disable(self, quiet=True):

566

923

"""Disable this client."""

567

924

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

568

925

return False

569

926

if not quiet:

570

self.send_changedstate()

571

if not quiet:

572

927

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

573

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

574

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)

575

930

self.disable_initiator_tag = None

576

931

self.expires = None

577

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

578

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)

579

934

self.checker_initiator_tag = None

580

935

self.stop_checker()

581

936

self.enabled = False

582

# 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

583

940

return False

584

941

585

942

def __del__(self):

588

945

def init_checker(self):

589

946

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

590

947

# and every interval from then on.

591

self.checker_initiator_tag = (gobject.timeout_add

592

(self.interval_milliseconds(),

593

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)

594

953

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

595

self.disable_initiator_tag = (gobject.timeout_add

596

(self.timeout_milliseconds(),

597

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)

598

958

# Also start a new checker *right now*.

599

959

self.start_checker()

600

960

601

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

961

def checker_callback(self, source, condition, connection,

962

command):

602

963

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

603

964

self.checker_callback_tag = None

604

965

self.checker = None

605

if os.WIFEXITED(condition):

606

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

607

973

if self.last_checker_status == 0:

608

974

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

609

975

vars(self))

610

976

self.checked_ok()

611

977

else:

612

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

613

vars(self))

978

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

614

979

else:

615

980

self.last_checker_status = -1

981

self.last_checker_signal = -returncode

616

982

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

617

983

vars(self))

618

619

def checked_ok(self, timeout=None):

620

"""Bump up the timeout for this client.

621

622

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

623

alive and well.

624

"""

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."""

625

995

if timeout is None:

626

996

timeout = self.timeout

627

self.last_checked_ok = datetime.datetime.utcnow()

628

997

if self.disable_initiator_tag is not None:

629

gobject.source_remove(self.disable_initiator_tag)

998

GLib.source_remove(self.disable_initiator_tag)

999

self.disable_initiator_tag = None

630

1000

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

631

self.disable_initiator_tag = (gobject.timeout_add

632

(timedelta_to_milliseconds

633

(timeout), self.disable))

1001

self.disable_initiator_tag = GLib.timeout_add(

1002

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

634

1003

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

635

1004

636

1005

def need_approval(self):

642

1011

If a checker already exists, leave it running and do

643

1012

nothing."""

644

1013

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

645

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

646

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

647

# client would inevitably timeout, since no checker would get

648

# 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

649

1018

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

650

1019

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

651

1020

# should be.

652

1021

653

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

654

try:

655

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

656

except (AttributeError, OSError) as error:

657

if (isinstance(error, OSError)

658

and error.errno != errno.ECHILD):

659

raise error

660

else:

661

if pid:

662

logger.warning("Checker was a zombie")

663

gobject.source_remove(self.checker_callback_tag)

664

self.checker_callback(pid, status,

665

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

666

1026

# Start a new checker if needed

667

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 }

668

1032

try:

669

# In case checker_command has exactly one % operator

670

command = self.checker_command % self.host

671

except TypeError:

672

# Escape attributes for the shell

673

escaped_attrs = dict(

674

(attr,

675

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

676

errors=

677

'replace')))

678

for attr in

679

self.runtime_expansions)

680

681

try:

682

command = self.checker_command % escaped_attrs

683

except TypeError as error:

684

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

685

' %s', self.checker_command, error)

686

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

687

1039

self.current_checker_command = command

688

try:

689

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

690

command, self.name)

691

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

692

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

693

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

694

# always replaced by /dev/null.)

695

self.checker = subprocess.Popen(command,

696

close_fds=True,

697

shell=True, cwd="/")

698

self.checker_callback_tag = (gobject.child_watch_add

699

(self.checker.pid,

700

self.checker_callback,

701

data=command))

702

# The checker may have completed before the gobject

703

# watch was added. Check for this.

704

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

705

if pid:

706

gobject.source_remove(self.checker_callback_tag)

707

self.checker_callback(pid, status, command)

708

except OSError as error:

709

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

710

error)

711

# 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

712

1066

return True

713

1067

714

1068

def stop_checker(self):

715

1069

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

716

1070

if self.checker_callback_tag:

717

gobject.source_remove(self.checker_callback_tag)

1071

GLib.source_remove(self.checker_callback_tag)

718

1072

self.checker_callback_tag = None

719

1073

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

720

1074

return

721

1075

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

722

try:

723

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

724

#time.sleep(0.5)

725

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

726

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

727

except OSError as error:

728

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

729

raise

1076

self.checker.terminate()

730

1077

self.checker = None

731

1078

732

1079

733

def dbus_service_property(dbus_interface, signature="v",

734

access="readwrite", byte_arrays=False):

1080

def dbus_service_property(dbus_interface,

1081

signature="v",

1082

access="readwrite",

1083

byte_arrays=False):

735

1084

"""Decorators for marking methods of a DBusObjectWithProperties to

736

1085

become properties on the D-Bus.

737

1086

746

1095

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

747

1096

if byte_arrays and signature != "ay":

748

1097

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

749

" signature %r" % signature)

1098

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

1099

750

1100

def decorator(func):

751

1101

func._dbus_is_property = True

752

1102

func._dbus_interface = dbus_interface

757

1107

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

758

1108

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

759

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

760

1154

return decorator

761

1155

762

1156

763

1157

class DBusPropertyException(dbus.exceptions.DBusException):

764

1158

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

765

1159

"""

766

def __unicode__(self):

767

return unicode(str(self))

1160

pass

768

1161

769

1162

770

1163

class DBusPropertyAccessException(DBusPropertyException):

779

1172

pass

780

1173

781

1174

782

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):

783

1265

"""A D-Bus object with properties.

784

1266

785

1267

Classes inheriting from this can use the dbus_service_property

787

1269

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

788

1270

"""

789

1271

790

@staticmethod

791

def _is_dbus_property(obj):

792

return getattr(obj, "_dbus_is_property", False)

793

794

def _get_all_dbus_properties(self):

795

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

796

"""

797

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

798

for cls in self.__class__.__mro__

799

for name, prop in

800

inspect.getmembers(cls, self._is_dbus_property))

801

802

1272

def _get_dbus_property(self, interface_name, property_name):

803

1273

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

804

1274

property with the specified name and interface.

805

1275

"""

806

for cls in self.__class__.__mro__:

807

for name, value in (inspect.getmembers

808

(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")):

809

1279

if (value._dbus_name == property_name

810

1280

and value._dbus_interface == interface_name):

811

1281

return value.__get__(self)

812

1282

813

1283

# No such property

814

raise DBusPropertyNotFound(self.dbus_object_path + ":"

815

+ interface_name + "."

816

+ property_name)

817

818

@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",

819

1298

out_signature="v")

820

1299

def Get(self, interface_name, property_name):

821

1300

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

839

1318

# The byte_arrays option is not supported yet on

840

1319

# signatures other than "ay".

841

1320

if prop._dbus_signature != "ay":

842

raise ValueError

843

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

844

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))

845

1326

prop(value)

846

1327

847

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

1328

@dbus.service.method(dbus.PROPERTIES_IFACE,

1329

in_signature="s",

848

1330

out_signature="a{sv}")

849

1331

def GetAll(self, interface_name):

850

1332

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

853

1335

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

854

1336

"""

855

1337

properties = {}

856

for name, prop in self._get_all_dbus_properties():

1338

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

857

1339

if (interface_name

858

1340

and interface_name != prop._dbus_interface):

859

1341

# Interface non-empty but did not match

865

1347

if not hasattr(value, "variant_level"):

866

1348

properties[name] = value

867

1349

continue

868

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

869

value.variant_level+1)

1350

properties[name] = type(value)(

1351

value, variant_level = value.variant_level + 1)

870

1352

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

871

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

872

1362

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

873

1363

out_signature="s",

874

1364

path_keyword='object_path',

875

1365

connection_keyword='connection')

876

1366

def Introspect(self, object_path, connection):

877

"""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.

878

1370

"""

879

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

880

connection)

1371

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1372

object_path,

1373

connection)

881

1374

try:

882

1375

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

1376

883

1377

def make_tag(document, name, prop):

884

1378

e = document.createElement("property")

885

1379

e.setAttribute("name", name)

886

1380

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

887

1381

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

888

1382

return e

1383

889

1384

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

1385

# Add property tags

890

1386

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

891

1387

for name, prop

892

in self._get_all_dbus_properties()

1388

in self._get_all_dbus_things("property")

893

1389

if prop._dbus_interface

894

1390

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

895

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)

896

1408

# Add the names to the return values for the

897

1409

# "org.freedesktop.DBus.Properties" methods

898

1410

if (if_tag.getAttribute("name")

913

1425

except (AttributeError, xml.dom.DOMException,

914

1426

xml.parsers.expat.ExpatError) as error:

915

1427

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

916

error)

917

return xmlstring

918

919

920

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):

921

1501

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

922

1502

if dt is None:

923

1503

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

924

return dbus.String(dt.isoformat(),

925

variant_level=variant_level)

926

927

928

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

929

.__metaclass__):

930

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

931

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).

932

1529

"""

933

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

934

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

935

# methods, signals, or properties in them

936

for base in (b for b in bases

937

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

938

# Go though all attributes of the base class

939

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):

940

1538

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

941

1539

# with the wrong interface name

942

1540

if (not hasattr(attribute, "_dbus_interface")

943

or not attribute._dbus_interface

944

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

1541

or not attribute._dbus_interface.startswith(

1542

orig_interface_name)):

945

1543

continue

946

1544

# Create an alternate D-Bus interface name based on

947

1545

# the current name

948

alt_interface = (attribute._dbus_interface

949

.replace("se.recompile.Mandos",

950

"se.bsnet.fukt.Mandos"))

1546

alt_interface = attribute._dbus_interface.replace(

1547

orig_interface_name, alt_interface_name)

1548

interface_names.add(alt_interface)

951

1549

# Is this a D-Bus signal?

952

1550

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

953

# Extract the original non-method function by

954

# black magic

955

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(

956

1555

zip(attribute.func_code.co_freevars,

957

attribute.__closure__))["func"]

958

.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)

959

1563

# Create a new, but exactly alike, function

960

1564

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

961

1565

# with the alternate D-Bus interface name

962

new_function = (dbus.service.signal

963

(alt_interface,

964

attribute._dbus_signature)

965

(types.FunctionType(

966

nonmethod_func.func_code,

967

nonmethod_func.func_globals,

968

nonmethod_func.func_name,

969

nonmethod_func.func_defaults,

970

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

971

1576

# Define a creator of a function to call both the

972

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

973

# 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

974

1580

def fixscope(func1, func2):

975

1581

"""This function is a scope container to pass

976

1582

func1 and func2 to the "call_both" function

977

1583

outside of its arguments"""

1584

1585

@functools.wraps(func2)

978

1586

def call_both(*args, **kwargs):

979

1587

"""This function will emit two D-Bus

980

1588

signals by calling func1 and func2"""

981

1589

func1(*args, **kwargs)

982

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

983

1596

return call_both

984

1597

# Create the "call_both" function and add it to

985

1598

# the class

986

attr[attrname] = fixscope(attribute,

987

new_function)

1599

attr[attrname] = fixscope(attribute, new_function)

988

1600

# Is this a D-Bus method?

989

1601

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

990

1602

# Create a new, but exactly alike, function

991

1603

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

992

1604

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

993

1605

# to the class.

994

attr[attrname] = (dbus.service.method

995

(alt_interface,

996

attribute._dbus_in_signature,

997

attribute._dbus_out_signature)

998

(types.FunctionType

999

(attribute.func_code,

1000

attribute.func_globals,

1001

attribute.func_name,

1002

attribute.func_defaults,

1003

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

1004

1618

# Is this a D-Bus property?

1005

1619

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

1006

1620

# Create a new, but exactly alike, function

1007

1621

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

1008

1622

# property with the alternate D-Bus interface

1009

1623

# name. Add it to the class.

1010

attr[attrname] = (dbus_service_property

1011

(alt_interface,

1012

attribute._dbus_signature,

1013

attribute._dbus_access,

1014

attribute

1015

._dbus_get_args_options

1016

["byte_arrays"])

1017

(types.FunctionType

1018

(attribute.func_code,

1019

attribute.func_globals,

1020

attribute.func_name,

1021

attribute.func_defaults,

1022

attribute.func_closure)))

1023

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

1024

1025

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"})

1026

1676

class ClientDBus(Client, DBusObjectWithProperties):

1027

1677

"""A Client class using D-Bus

1028

1678

1032

1682

"""

1033

1683

1034

1684

runtime_expansions = (Client.runtime_expansions

1035

+ ("dbus_object_path",))

1685

+ ("dbus_object_path", ))

1686

1687

_interface = "se.recompile.Mandos.Client"

1036

1688

1037

1689

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

1038

1690

1039

1691

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

1040

1692

self.bus = bus

1041

1693

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

1042

self._approvals_pending = 0

1043

1044

self._approvals_pending = 0

1045

1694

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

1046

1695

# the D-Bus

1047

client_object_name = unicode(self.name).translate(

1696

client_object_name = str(self.name).translate(

1048

1697

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

1049

1698

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

1050

self.dbus_object_path = (dbus.ObjectPath

1051

("/clients/" + client_object_name))

1699

self.dbus_object_path = dbus.ObjectPath(

1700

"/clients/" + client_object_name)

1052

1701

DBusObjectWithProperties.__init__(self, self.bus,

1053

1702

self.dbus_object_path)

1054

1055

def notifychangeproperty(transform_func,

1056

dbus_name, type_func=lambda x: x,

1057

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):

1058

1709

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

1059

1710

its changes to DBus.

1060

1711

1065

1716

to the D-Bus. Default: no transform

1066

1717

variant_level: D-Bus variant level. Default: 1

1067

1718

"""

1068

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

1719

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

1720

1069

1721

def setter(self, value):

1070

1722

if hasattr(self, "dbus_object_path"):

1071

1723

if (not hasattr(self, attrname) or

1072

1724

type_func(getattr(self, attrname, None))

1073

1725

!= type_func(value)):

1074

dbus_value = transform_func(type_func(value),

1075

variant_level

1076

=variant_level)

1077

self.PropertyChanged(dbus.String(dbus_name),

1078

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())

1079

1741

setattr(self, attrname, value)

1080

1742

1081

1743

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

1082

1744

1083

1084

1745

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1085

1746

approvals_pending = notifychangeproperty(dbus.Boolean,

1086

1747

"ApprovalPending",

1088

1749

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

1089

1750

last_enabled = notifychangeproperty(datetime_to_dbus,

1090

1751

"LastEnabled")

1091

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

1092

type_func = lambda checker:

1093

checker is not None)

1752

checker = notifychangeproperty(

1753

dbus.Boolean, "CheckerRunning",

1754

type_func = lambda checker: checker is not None)

1094

1755

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1095

1756

"LastCheckedOK")

1757

last_checker_status = notifychangeproperty(dbus.Int16,

1758

"LastCheckerStatus")

1096

1759

last_approval_request = notifychangeproperty(

1097

1760

datetime_to_dbus, "LastApprovalRequest")

1098

1761

approved_by_default = notifychangeproperty(dbus.Boolean,

1099

1762

"ApprovedByDefault")

1100

approval_delay = notifychangeproperty(dbus.UInt64,

1101

"ApprovalDelay",

1102

type_func =

1103

timedelta_to_milliseconds)

1763

approval_delay = notifychangeproperty(

1764

dbus.UInt64, "ApprovalDelay",

1765

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

1104

1766

approval_duration = notifychangeproperty(

1105

1767

dbus.UInt64, "ApprovalDuration",

1106

type_func = timedelta_to_milliseconds)

1768

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

1107

1769

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

1108

timeout = notifychangeproperty(dbus.UInt64, "Timeout",

1109

type_func =

1110

timedelta_to_milliseconds)

1770

timeout = notifychangeproperty(

1771

dbus.UInt64, "Timeout",

1772

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

1111

1773

extended_timeout = notifychangeproperty(

1112

1774

dbus.UInt64, "ExtendedTimeout",

1113

type_func = timedelta_to_milliseconds)

1114

interval = notifychangeproperty(dbus.UInt64,

1115

"Interval",

1116

type_func =

1117

timedelta_to_milliseconds)

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)

1118

1779

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

1780

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

1781

invalidate_only=True)

1119

1782

1120

1783

del notifychangeproperty

1121

1784

1128

1791

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

1129

1792

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

1130

1793

1131

def checker_callback(self, pid, condition, command,

1132

*args, **kwargs):

1133

self.checker_callback_tag = None

1134

self.checker = None

1135

if os.WIFEXITED(condition):

1136

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:

1137

1801

# Emit D-Bus signal

1138

1802

self.CheckerCompleted(dbus.Int16(exitstatus),

1139

dbus.Int64(condition),

1803

# This is specific to GNU libC

1804

dbus.Int64(exitstatus << 8),

1140

1805

dbus.String(command))

1141

1806

else:

1142

1807

# Emit D-Bus signal

1143

1808

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

1144

dbus.Int64(condition),

1809

dbus.Int64(

1810

# This is specific to GNU libC

1811

(exitstatus << 8)

1812

| self.last_checker_signal),

1145

1813

dbus.String(command))

1146

1147

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

1148

*args, **kwargs)

1814

return ret

1149

1815

1150

1816

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

1151

old_checker = self.checker

1152

if self.checker is not None:

1153

old_checker_pid = self.checker.pid

1154

else:

1155

old_checker_pid = None

1817

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

1156

1818

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

1157

1819

# Only if new checker process was started

1158

1820

if (self.checker is not None

1166

1828

return False

1167

1829

1168

1830

def approve(self, value=True):

1169

self.send_changedstate()

1170

1831

self.approved = value

1171

gobject.timeout_add(timedelta_to_milliseconds

1172

(self.approval_duration),

1173

self._reset_approved)

1174

1832

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

1833

* 1000), self._reset_approved)

1834

self.send_changedstate()

1175

1835

1176

1836

## D-Bus methods, signals & properties

1177

_interface = "se.recompile.Mandos.Client"

1837

1838

## Interfaces

1178

1839

1179

1840

## Signals

1180

1841

1191

1852

pass

1192

1853

1193

1854

# PropertyChanged - signal

1855

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

1194

1856

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

1195

1857

def PropertyChanged(self, property, value):

1196

1858

"D-Bus signal"

1217

1879

"D-Bus signal"

1218

1880

return self.need_approval()

1219

1881

1220

# NeRwequest - signal

1221

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

1222

def NewRequest(self, ip):

1223

"""D-Bus signal

1224

Is sent after a client request a password.

1225

"""

1226

pass

1227

1228

1882

## Methods

1229

1883

1230

1884

# Approve - method

1238

1892

self.checked_ok()

1239

1893

1240

1894

# Enable - method

1895

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

1241

1896

@dbus.service.method(_interface)

1242

1897

def Enable(self):

1243

1898

"D-Bus method"

1244

1899

self.enable()

1245

1900

1246

1901

# StartChecker - method

1902

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

1247

1903

@dbus.service.method(_interface)

1248

1904

def StartChecker(self):

1249

1905

"D-Bus method"

1250

1906

self.start_checker()

1251

1907

1252

1908

# Disable - method

1909

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

1253

1910

@dbus.service.method(_interface)

1254

1911

def Disable(self):

1255

1912

"D-Bus method"

1256

1913

self.disable()

1257

1914

1258

1915

# StopChecker - method

1916

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

1259

1917

@dbus.service.method(_interface)

1260

1918

def StopChecker(self):

1261

1919

self.stop_checker()

1268

1926

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

1269

1927

1270

1928

# ApprovedByDefault - property

1271

@dbus_service_property(_interface, signature="b",

1929

@dbus_service_property(_interface,

1930

signature="b",

1272

1931

access="readwrite")

1273

1932

def ApprovedByDefault_dbus_property(self, value=None):

1274

1933

if value is None: # get

1276

1935

self.approved_by_default = bool(value)

1277

1936

1278

1937

# ApprovalDelay - property

1279

@dbus_service_property(_interface, signature="t",

1938

@dbus_service_property(_interface,

1939

signature="t",

1280

1940

access="readwrite")

1281

1941

def ApprovalDelay_dbus_property(self, value=None):

1282

1942

if value is None: # get

1283

return dbus.UInt64(self.approval_delay_milliseconds())

1943

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

1944

* 1000)

1284

1945

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

1285

1946

1286

1947

# ApprovalDuration - property

1287

@dbus_service_property(_interface, signature="t",

1948

@dbus_service_property(_interface,

1949

signature="t",

1288

1950

access="readwrite")

1289

1951

def ApprovalDuration_dbus_property(self, value=None):

1290

1952

if value is None: # get

1291

return dbus.UInt64(timedelta_to_milliseconds(

1292

self.approval_duration))

1953

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

1954

* 1000)

1293

1955

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

1294

1956

1295

1957

# Name - property

1958

@dbus_annotations(

1959

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

1296

1960

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

1297

1961

def Name_dbus_property(self):

1298

1962

return dbus.String(self.name)

1299

1963

1300

1964

# Fingerprint - property

1965

@dbus_annotations(

1966

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

1301

1967

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

1302

1968

def Fingerprint_dbus_property(self):

1303

1969

return dbus.String(self.fingerprint)

1304

1970

1305

1971

# Host - property

1306

@dbus_service_property(_interface, signature="s",

1972

@dbus_service_property(_interface,

1973

signature="s",

1307

1974

access="readwrite")

1308

1975

def Host_dbus_property(self, value=None):

1309

1976

if value is None: # get

1310

1977

return dbus.String(self.host)

1311

self.host = unicode(value)

1978

self.host = str(value)

1312

1979

1313

1980

# Created - property

1981

@dbus_annotations(

1982

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

1314

1983

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

1315

1984

def Created_dbus_property(self):

1316

1985

return datetime_to_dbus(self.created)

1321

1990

return datetime_to_dbus(self.last_enabled)

1322

1991

1323

1992

# Enabled - property

1324

@dbus_service_property(_interface, signature="b",

1993

@dbus_service_property(_interface,

1994

signature="b",

1325

1995

access="readwrite")

1326

1996

def Enabled_dbus_property(self, value=None):

1327

1997

if value is None: # get

1332

2002

self.disable()

1333

2003

1334

2004

# LastCheckedOK - property

1335

@dbus_service_property(_interface, signature="s",

2005

@dbus_service_property(_interface,

2006

signature="s",

1336

2007

access="readwrite")

1337

2008

def LastCheckedOK_dbus_property(self, value=None):

1338

2009

if value is not None:

1340

2011

return

1341

2012

return datetime_to_dbus(self.last_checked_ok)

1342

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

1343

2019

# Expires - property

1344

2020

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

1345

2021

def Expires_dbus_property(self):

1351

2027

return datetime_to_dbus(self.last_approval_request)

1352

2028

1353

2029

# Timeout - property

1354

@dbus_service_property(_interface, signature="t",

2030

@dbus_service_property(_interface,

2031

signature="t",

1355

2032

access="readwrite")

1356

2033

def Timeout_dbus_property(self, value=None):

1357

2034

if value is None: # get

1358

return dbus.UInt64(self.timeout_milliseconds())

2035

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

2036

old_timeout = self.timeout

1359

2037

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

1360

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

1361

return

1362

# Reschedule timeout

1363

gobject.source_remove(self.disable_initiator_tag)

1364

self.disable_initiator_tag = None

1365

self.expires = None

1366

time_to_die = timedelta_to_milliseconds((self

1367

.last_checked_ok

1368

+ self.timeout)

1369

- datetime.datetime

1370

.utcnow())

1371

if time_to_die <= 0:

1372

# The timeout has passed

1373

self.disable()

1374

else:

1375

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

1376

+ datetime.timedelta(milliseconds =

1377

time_to_die))

1378

self.disable_initiator_tag = (gobject.timeout_add

1379

(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)

1380

2053

1381

2054

# ExtendedTimeout - property

1382

@dbus_service_property(_interface, signature="t",

2055

@dbus_service_property(_interface,

2056

signature="t",

1383

2057

access="readwrite")

1384

2058

def ExtendedTimeout_dbus_property(self, value=None):

1385

2059

if value is None: # get

1386

return dbus.UInt64(self.extended_timeout_milliseconds())

2060

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

2061

* 1000)

1387

2062

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

1388

2063

1389

2064

# Interval - property

1390

@dbus_service_property(_interface, signature="t",

2065

@dbus_service_property(_interface,

2066

signature="t",

1391

2067

access="readwrite")

1392

2068

def Interval_dbus_property(self, value=None):

1393

2069

if value is None: # get

1394

return dbus.UInt64(self.interval_milliseconds())

2070

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

1395

2071

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

1396

2072

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

1397

2073

return

1398

2074

if self.enabled:

1399

2075

# Reschedule checker run

1400

gobject.source_remove(self.checker_initiator_tag)

1401

self.checker_initiator_tag = (gobject.timeout_add

1402

(value, self.start_checker))

1403

self.start_checker() # Start one now, too

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

1404

2080

1405

2081

# Checker - property

1406

@dbus_service_property(_interface, signature="s",

2082

@dbus_service_property(_interface,

2083

signature="s",

1407

2084

access="readwrite")

1408

2085

def Checker_dbus_property(self, value=None):

1409

2086

if value is None: # get

1410

2087

return dbus.String(self.checker_command)

1411

self.checker_command = unicode(value)

2088

self.checker_command = str(value)

1412

2089

1413

2090

# CheckerRunning - property

1414

@dbus_service_property(_interface, signature="b",

2091

@dbus_service_property(_interface,

2092

signature="b",

1415

2093

access="readwrite")

1416

2094

def CheckerRunning_dbus_property(self, value=None):

1417

2095

if value is None: # get

1422

2100

self.stop_checker()

1423

2101

1424

2102

# ObjectPath - property

2103

@dbus_annotations(

2104

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

2105

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

1425

2106

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

1426

2107

def ObjectPath_dbus_property(self):

1427

2108

return self.dbus_object_path # is already a dbus.ObjectPath

1428

2109

1429

2110

# Secret = property

1430

@dbus_service_property(_interface, signature="ay",

1431

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)

1432

2118

def Secret_dbus_property(self, value):

1433

self.secret = str(value)

2119

self.secret = bytes(value)

1434

2120

1435

2121

del _interface

1436

2122

1440

2126

self._pipe = child_pipe

1441

2127

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

1442

2128

if not self._pipe.recv():

1443

raise KeyError()

2129

raise KeyError(fpr)

1444

2130

1445

2131

def __getattribute__(self, name):

1446

2132

if name == '_pipe':

1450

2136

if data[0] == 'data':

1451

2137

return data[1]

1452

2138

if data[0] == 'function':

2139

1453

2140

def func(*args, **kwargs):

1454

2141

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

1455

2142

return self._pipe.recv()[1]

2143

1456

2144

return func

1457

2145

1458

2146

def __setattr__(self, name, value):

1461

2149

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

1462

2150

1463

2151

1464

class ClientDBusTransitional(ClientDBus):

1465

__metaclass__ = AlternateDBusNamesMetaclass

1466

1467

1468

2152

class ClientHandler(socketserver.BaseRequestHandler, object):

1469

2153

"""A class to handle client connections.

1470

2154

1474

2158

def handle(self):

1475

2159

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

1476

2160

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

1477

unicode(self.client_address))

2161

str(self.client_address))

1478

2162

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

1479

2163

self.server.child_pipe.fileno())

1480

2164

1481

session = (gnutls.connection

1482

.ClientSession(self.request,

1483

gnutls.connection

1484

.X509Credentials()))

1485

1486

# Note: gnutls.connection.X509Credentials is really a

1487

# generic GnuTLS certificate credentials object so long as

1488

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

1489

# here despite using OpenPGP certificates.

2165

session = gnutls.ClientSession(self.request)

1490

2166

1491

2167

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

1492

2168

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

1496

2172

priority = self.server.gnutls_priority

1497

2173

if priority is None:

1498

2174

priority = "NORMAL"

1499

(gnutls.library.functions

1500

.gnutls_priority_set_direct(session._c_object,

1501

priority, None))

2175

gnutls.priority_set_direct(session._c_object, priority,

2176

None)

1502

2177

1503

2178

# Start communication using the Mandos protocol

1504

2179

# Get protocol number

1506

2181

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

1507

2182

try:

1508

2183

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

1509

raise RuntimeError

2184

raise RuntimeError(line)

1510

2185

except (ValueError, IndexError, RuntimeError) as error:

1511

2186

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

1512

2187

return

1514

2189

# Start GnuTLS connection

1515

2190

try:

1516

2191

session.handshake()

1517

except gnutls.errors.GNUTLSError as error:

2192

except gnutls.Error as error:

1518

2193

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

1519

2194

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

1520

2195

# established. Just abandon the request.

1524

2199

approval_required = False

1525

2200

try:

1526

2201

try:

1527

fpr = self.fingerprint(self.peer_certificate

1528

(session))

1529

except (TypeError,

1530

gnutls.errors.GNUTLSError) as error:

2202

fpr = self.fingerprint(

2203

self.peer_certificate(session))

2204

except (TypeError, gnutls.Error) as error:

1531

2205

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

1532

2206

return

1533

2207

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

1538

2212

except KeyError:

1539

2213

return

1540

2214

1541

if self.server.use_dbus:

1542

# Emit D-Bus signal

1543

client.NewRequest(str(self.client_address))

1544

1545

2215

if client.approval_delay:

1546

2216

delay = client.approval_delay

1547

2217

client.approvals_pending += 1

1550

2220

while True:

1551

2221

if not client.enabled:

1552

2222

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

1553

client.name)

2223

client.name)

1554

2224

if self.server.use_dbus:

1555

2225

# Emit D-Bus signal

1556

2226

client.Rejected("Disabled")

1565

2235

if self.server.use_dbus:

1566

2236

# Emit D-Bus signal

1567

2237

client.NeedApproval(

1568

client.approval_delay_milliseconds(),

1569

client.approved_by_default)

2238

client.approval_delay.total_seconds()

2239

* 1000, client.approved_by_default)

1570

2240

else:

1571

2241

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

1572

2242

client.name)

1578

2248

#wait until timeout or approved

1579

2249

time = datetime.datetime.now()

1580

2250

client.changedstate.acquire()

1581

(client.changedstate.wait

1582

(float(client.timedelta_to_milliseconds(delay)

1583

/ 1000)))

2251

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

1584

2252

client.changedstate.release()

1585

2253

time2 = datetime.datetime.now()

1586

2254

if (time2 - time) >= delay:

1597

2265

else:

1598

2266

delay -= time2 - time

1599

2267

1600

sent_size = 0

1601

while sent_size < len(client.secret):

1602

try:

1603

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

1604

except gnutls.errors.GNUTLSError as error:

1605

logger.warning("gnutls send failed")

1606

return

1607

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

1608

sent, len(client.secret)

1609

- (sent_size + sent))

1610

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

1611

2274

1612

2275

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

1613

2276

# bump the timeout using extended_timeout

1614

client.checked_ok(client.extended_timeout)

2277

client.bump_timeout(client.extended_timeout)

1615

2278

if self.server.use_dbus:

1616

2279

# Emit D-Bus signal

1617

2280

client.GotSecret()

1621

2284

client.approvals_pending -= 1

1622

2285

try:

1623

2286

session.bye()

1624

except gnutls.errors.GNUTLSError as error:

1625

logger.warning("GnuTLS bye failed")

2287

except gnutls.Error as error:

2288

logger.warning("GnuTLS bye failed",

2289

exc_info=error)

1626

2290

1627

2291

@staticmethod

1628

2292

def peer_certificate(session):

1629

2293

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

1630

2294

# If not an OpenPGP certificate...

1631

if (gnutls.library.functions

1632

.gnutls_certificate_type_get(session._c_object)

1633

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1634

# ...do the normal thing

1635

return session.peer_certificate

2295

if (gnutls.certificate_type_get(session._c_object)

2296

!= gnutls.CRT_OPENPGP):

2297

# ...return invalid data

2298

return b""

1636

2299

list_size = ctypes.c_uint(1)

1637

cert_list = (gnutls.library.functions

1638

.gnutls_certificate_get_peers

2300

cert_list = (gnutls.certificate_get_peers

1639

2301

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

1640

2302

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

1641

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

1642

" certificate")

2303

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

1643

2304

if list_size.value == 0:

1644

2305

return None

1645

2306

cert = cert_list[0]

1649

2310

def fingerprint(openpgp):

1650

2311

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1651

2312

# New GnuTLS "datum" with the OpenPGP public key

1652

datum = (gnutls.library.types

1653

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

1654

ctypes.POINTER

1655

(ctypes.c_ubyte)),

1656

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)))

1657

2317

# New empty GnuTLS certificate

1658

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1659

(gnutls.library.functions

1660

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2318

crt = gnutls.openpgp_crt_t()

2319

gnutls.openpgp_crt_init(ctypes.byref(crt))

1661

2320

# Import the OpenPGP public key into the certificate

1662

(gnutls.library.functions

1663

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

1664

gnutls.library.constants

1665

.GNUTLS_OPENPGP_FMT_RAW))

2321

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

2322

gnutls.OPENPGP_FMT_RAW)

1666

2323

# Verify the self signature in the key

1667

2324

crtverify = ctypes.c_uint()

1668

(gnutls.library.functions

1669

.gnutls_openpgp_crt_verify_self(crt, 0,

1670

ctypes.byref(crtverify)))

2325

gnutls.openpgp_crt_verify_self(crt, 0,

2326

ctypes.byref(crtverify))

1671

2327

if crtverify.value != 0:

1672

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1673

raise (gnutls.errors.CertificateSecurityError

1674

("Verify failed"))

2328

gnutls.openpgp_crt_deinit(crt)

2329

raise gnutls.CertificateSecurityError("Verify failed")

1675

2330

# New buffer for the fingerprint

1676

2331

buf = ctypes.create_string_buffer(20)

1677

2332

buf_len = ctypes.c_size_t()

1678

2333

# Get the fingerprint from the certificate into the buffer

1679

(gnutls.library.functions

1680

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

1681

ctypes.byref(buf_len)))

2334

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

2335

ctypes.byref(buf_len))

1682

2336

# Deinit the certificate

1683

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2337

gnutls.openpgp_crt_deinit(crt)

1684

2338

# Convert the buffer to a Python bytestring

1685

2339

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

1686

2340

# Convert the bytestring to hexadecimal notation

1690

2344

1691

2345

class MultiprocessingMixIn(object):

1692

2346

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

2347

1693

2348

def sub_process_main(self, request, address):

1694

2349

try:

1695

2350

self.finish_request(request, address)

1700

2355

def process_request(self, request, address):

1701

2356

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

1702

2357

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

1703

args = (request,

1704

address))

2358

args = (request, address))

1705

2359

proc.start()

1706

2360

return proc

1707

2361

1708

2362

1709

2363

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1710

2364

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

2365

1711

2366

def process_request(self, request, client_address):

1712

2367

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

1713

2368

1722

2377

1723

2378

def add_pipe(self, parent_pipe, proc):

1724

2379

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

1725

raise NotImplementedError

2380

raise NotImplementedError()

1726

2381

1727

2382

1728

2383

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1734

2389

interface: None or a network interface name (string)

1735

2390

use_ipv6: Boolean; to use IPv6 or not

1736

2391

"""

2392

1737

2393

def __init__(self, server_address, RequestHandlerClass,

1738

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

"""

1739

2400

self.interface = interface

1740

2401

if use_ipv6:

1741

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.

1742

2429

socketserver.TCPServer.__init__(self, server_address,

1743

2430

RequestHandlerClass)

2431

1744

2432

def server_bind(self):

1745

2433

"""This overrides the normal server_bind() function

1746

2434

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

1752

2440

self.interface)

1753

2441

else:

1754

2442

try:

1755

self.socket.setsockopt(socket.SOL_SOCKET,

1756

SO_BINDTODEVICE,

1757

str(self.interface

1758

+ '\0'))

2443

self.socket.setsockopt(

2444

socket.SOL_SOCKET, SO_BINDTODEVICE,

2445

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

1759

2446

except socket.error as error:

1760

if error[0] == errno.EPERM:

1761

logger.error("No permission to"

1762

" bind to interface %s",

1763

self.interface)

1764

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:

1765

2451

logger.error("SO_BINDTODEVICE not available;"

1766

2452

" cannot bind to interface %s",

1767

2453

self.interface)

2454

elif error.errno == errno.ENODEV:

2455

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

2456

" cannot bind", self.interface)

1768

2457

else:

1769

2458

raise

1770

2459

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

1773

2462

if self.address_family == socket.AF_INET6:

1774

2463

any_address = "::" # in6addr_any

1775

2464

else:

1776

any_address = socket.INADDR_ANY

2465

any_address = "0.0.0.0" # INADDR_ANY

1777

2466

self.server_address = (any_address,

1778

2467

self.server_address[1])

1779

2468

elif not self.server_address[1]:

1780

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

1781

0)

2469

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

1782

2470

# if self.interface:

1783

2471

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

1784

2472

# 0, # port

1796

2484

gnutls_priority GnuTLS priority string

1797

2485

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

1798

2486

1799

Assumes a gobject.MainLoop event loop.

2487

Assumes a GLib.MainLoop event loop.

1800

2488

"""

2489

1801

2490

def __init__(self, server_address, RequestHandlerClass,

1802

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

1803

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):

1804

2497

self.enabled = False

1805

2498

self.clients = clients

1806

2499

if self.clients is None:

1810

2503

IPv6_TCPServer.__init__(self, server_address,

1811

2504

RequestHandlerClass,

1812

2505

interface = interface,

1813

use_ipv6 = use_ipv6)

2506

use_ipv6 = use_ipv6,

2507

socketfd = socketfd)

2508

1814

2509

def server_activate(self):

1815

2510

if self.enabled:

1816

2511

return socketserver.TCPServer.server_activate(self)

1820

2515

1821

2516

def add_pipe(self, parent_pipe, proc):

1822

2517

# Call "handle_ipc" for both data and EOF events

1823

gobject.io_add_watch(parent_pipe.fileno(),

1824

gobject.IO_IN | gobject.IO_HUP,

1825

functools.partial(self.handle_ipc,

1826

parent_pipe =

1827

parent_pipe,

1828

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))

1829

2524

1830

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

1831

proc = None, client_object=None):

1832

condition_names = {

1833

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

1834

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

1835

# blocking).

1836

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

1837

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

1838

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

1839

# broken, usually for pipes and

1840

# sockets).

1841

}

1842

conditions_string = ' | '.join(name

1843

for cond, name in

1844

condition_names.iteritems()

1845

if cond & condition)

2525

def handle_ipc(self, source, condition,

2526

parent_pipe=None,

2527

proc = None,

2528

client_object=None):

1846

2529

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

1847

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

2530

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

1848

2531

# Wait for other process to exit

1849

2532

proc.join()

1850

2533

return False

1857

2540

fpr = request[1]

1858

2541

address = request[2]

1859

2542

1860

for c in self.clients.itervalues():

2543

for c in self.clients.values():

1861

2544

if c.fingerprint == fpr:

1862

2545

client = c

1863

2546

break

1871

2554

parent_pipe.send(False)

1872

2555

return False

1873

2556

1874

gobject.io_add_watch(parent_pipe.fileno(),

1875

gobject.IO_IN | gobject.IO_HUP,

1876

functools.partial(self.handle_ipc,

1877

parent_pipe =

1878

parent_pipe,

1879

proc = proc,

1880

client_object =

1881

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))

1882

2564

parent_pipe.send(True)

1883

2565

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

1884

2566

# same fileno

1890

2572

1891

2573

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

1892

2574

funcname)(*args,

1893

**kwargs)))

2575

**kwargs)))

1894

2576

1895

2577

if command == 'getattr':

1896

2578

attrname = request[1]

1897

if callable(client_object.__getattribute__(attrname)):

1898

parent_pipe.send(('function',))

2579

if isinstance(client_object.__getattribute__(attrname),

2580

collections.Callable):

2581

parent_pipe.send(('function', ))

1899

2582

else:

1900

parent_pipe.send(('data', client_object

1901

.__getattribute__(attrname)))

2583

parent_pipe.send((

2584

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

1902

2585

1903

2586

if command == 'setattr':

1904

2587

attrname = request[1]

1908

2591

return True

1909

2592

1910

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

1911

2690

def string_to_delta(interval):

1912

2691

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

1913

2692

1924

2703

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

1925

2704

datetime.timedelta(0, 330)

1926

2705

"""

2706

2707

try:

2708

return rfc3339_duration_to_delta(interval)

2709

except ValueError:

2710

pass

2711

1927

2712

timevalue = datetime.timedelta(0)

1928

2713

for s in interval.split():

1929

2714

try:

1930

suffix = unicode(s[-1])

2715

suffix = s[-1]

1931

2716

value = int(s[:-1])

1932

2717

if suffix == "d":

1933

2718

delta = datetime.timedelta(value)

1940

2725

elif suffix == "w":

1941

2726

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

1942

2727

else:

1943

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

1944

except (ValueError, IndexError) as e:

2728

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

2729

except IndexError as e:

1945

2730

raise ValueError(*(e.args))

1946

2731

timevalue += delta

1947

2732

return timevalue

1960

2745

sys.exit()

1961

2746

if not noclose:

1962

2747

# Close all standard open file descriptors

1963

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

2748

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

1964

2749

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

1965

2750

raise OSError(errno.ENODEV,

1966

"%s not a character device"

1967

% os.path.devnull)

2751

"{} not a character device"

2752

.format(os.devnull))

1968

2753

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

1969

2754

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

1970

2755

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

1979

2764

1980

2765

parser = argparse.ArgumentParser()

1981

2766

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

1982

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

2767

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

1983

2768

help="show version number and exit")

1984

2769

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

1985

2770

help="Bind to interface IF")

1991

2776

help="Run self-test")

1992

2777

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

1993

2778

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

1994

" to terminal")

2779

" to terminal", default=None)

1995

2780

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

1996

2781

help="Debug level for stdout output")

1997

2782

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

2004

2789

" files")

2005

2790

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

2006

2791

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

2007

" system bus interface")

2792

" system bus interface", default=None)

2008

2793

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

2009

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

2794

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

2795

default=None)

2010

2796

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

2011

2797

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

2012

" 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")

2013

2802

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

2014

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)

2015

2809

2016

2810

options = parser.parse_args()

2017

2811

2018

2812

if options.check:

2019

2813

import doctest

2020

doctest.testmod()

2021

sys.exit()

2814

fail_count, test_count = doctest.testmod()

2815

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

2022

2816

2023

2817

# Default values for config file for server-global settings

2024

2818

server_defaults = { "interface": "",

2026

2820

"port": "",

2027

2821

"debug": "False",

2028

2822

"priority":

2029

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

2823

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

2824

":+SIGN-DSA-SHA256",

2030

2825

"servicename": "Mandos",

2031

2826

"use_dbus": "True",

2032

2827

"use_ipv6": "True",

2033

2828

"debuglevel": "",

2034

2829

"restore": "True",

2035

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

2036

}

2830

"socket": "",

2831

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

2832

"foreground": "False",

2833

"zeroconf": "True",

2834

}

2037

2835

2038

2836

# Parse config file for server-global settings

2039

2837

server_config = configparser.SafeConfigParser(server_defaults)

2040

2838

del server_defaults

2041

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

2042

"mandos.conf"))

2839

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

2043

2840

# Convert the SafeConfigParser object to a dict

2044

2841

server_settings = server_config.defaults()

2045

2842

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

2046

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

2843

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

2047

2844

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

2048

2845

option)

2049

2846

if server_settings["port"]:

2050

2847

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

2051

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"])

2052

2858

del server_config

2053

2859

2054

2860

# Override the settings from the config file with command line

2055

2861

# options, if set.

2056

2862

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

2057

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

2058

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

2059

"statedir"):

2863

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

2864

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

2865

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

2060

2866

value = getattr(options, option)

2061

2867

if value is not None:

2062

2868

server_settings[option] = value

2063

2869

del options

2064

2870

# Force all strings to be unicode

2065

2871

for option in server_settings.keys():

2066

if type(server_settings[option]) is str:

2067

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

2068

2882

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

2069

2883

2070

2884

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

2071

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

2072

2891

# For convenience

2073

2892

debug = server_settings["debug"]

2074

2893

debuglevel = server_settings["debuglevel"]

2076

2895

use_ipv6 = server_settings["use_ipv6"]

2077

2896

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

2078

2897

stored_state_file)

2898

foreground = server_settings["foreground"]

2899

zeroconf = server_settings["zeroconf"]

2079

2900

2080

2901

if debug:

2081

initlogger(logging.DEBUG)

2902

initlogger(debug, logging.DEBUG)

2082

2903

else:

2083

2904

if not debuglevel:

2084

initlogger()

2905

initlogger(debug)

2085

2906

else:

2086

2907

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

2087

initlogger(level)

2908

initlogger(debug, level)

2088

2909

2089

2910

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

2090

syslogger.setFormatter(logging.Formatter

2091

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

2092

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

2093

% server_settings["servicename"]))

2911

syslogger.setFormatter(

2912

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

2913

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

2914

server_settings["servicename"])))

2094

2915

2095

2916

# Parse config file with clients

2096

client_config = configparser.SafeConfigParser(Client.client_defaults)

2917

client_config = configparser.SafeConfigParser(Client

2918

.client_defaults)

2097

2919

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

2098

2920

"clients.conf"))

2099

2921

2100

2922

global mandos_dbus_service

2101

2923

mandos_dbus_service = None

2102

2924

2103

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

2104

server_settings["port"]),

2105

ClientHandler,

2106

interface=(server_settings["interface"]

2107

or None),

2108

use_ipv6=use_ipv6,

2109

gnutls_priority=

2110

server_settings["priority"],

2111

use_dbus=use_dbus)

2112

if not debug:

2113

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

2114

2941

try:

2115

pidfile = open(pidfilename, "w")

2116

except IOError:

2117

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)

2118

2946

2119

try:

2120

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

2121

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

2122

except KeyError:

2947

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

2948

("mandos", "mandos"),

2949

("nobody", "nogroup")):

2123

2950

try:

2124

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

2125

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

2951

uid = pwd.getpwnam(name).pw_uid

2952

gid = pwd.getpwnam(group).pw_gid

2953

break

2126

2954

except KeyError:

2127

try:

2128

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

2129

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

2130

except KeyError:

2131

uid = 65534

2132

gid = 65534

2955

continue

2956

else:

2957

uid = 65534

2958

gid = 65534

2133

2959

try:

2134

2960

os.setgid(gid)

2135

2961

os.setuid(uid)

2962

if debug:

2963

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

2964

gid))

2136

2965

except OSError as error:

2137

if error[0] != errno.EPERM:

2138

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

2139

2970

2140

2971

if debug:

2141

2972

# Enable all possible GnuTLS debugging

2142

2973

2143

2974

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

2144

2975

# - GnuTLS manual

2145

gnutls.library.functions.gnutls_global_set_log_level(11)

2976

gnutls.global_set_log_level(11)

2146

2977

2147

@gnutls.library.types.gnutls_log_func

2978

@gnutls.log_func

2148

2979

def debug_gnutls(level, string):

2149

2980

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

2150

2981

2151

(gnutls.library.functions

2152

.gnutls_global_set_log_function(debug_gnutls))

2982

gnutls.global_set_log_function(debug_gnutls)

2153

2983

2154

2984

# Redirect stdin so all checkers get /dev/null

2155

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

2985

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

2156

2986

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

2157

2987

if null > 2:

2158

2988

os.close(null)

2159

else:

2160

# No console logging

2161

logger.removeHandler(console)

2162

2989

2163

2990

# Need to fork before connecting to D-Bus

2164

if not debug:

2991

if not foreground:

2165

2992

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

2166

2993

daemon()

2167

2994

2168

gobject.threads_init()

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()

2169

2998

2170

2999

global main_loop

2171

3000

# From the Avahi example code

2172

DBusGMainLoop(set_as_default=True )

2173

main_loop = gobject.MainLoop()

3001

DBusGMainLoop(set_as_default=True)

3002

main_loop = GLib.MainLoop()

2174

3003

bus = dbus.SystemBus()

2175

3004

# End of Avahi example code

2176

3005

if use_dbus:

2177

3006

try:

2178

3007

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

2179

bus, do_not_queue=True)

2180

old_bus_name = (dbus.service.BusName

2181

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

2182

do_not_queue=True))

2183

except dbus.exceptions.NameExistsException as e:

2184

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)

2185

3015

use_dbus = False

2186

3016

server_settings["use_dbus"] = False

2187

3017

tcp_server.use_dbus = False

2188

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2189

service = AvahiServiceToSyslog(name =

2190

server_settings["servicename"],

2191

servicetype = "_mandos._tcp",

2192

protocol = protocol, bus = bus)

2193

if server_settings["interface"]:

2194

service.interface = (if_nametoindex

2195

(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"))

2196

3028

2197

3029

global multiprocessing_manager

2198

3030

multiprocessing_manager = multiprocessing.Manager()

2199

3031

2200

3032

client_class = Client

2201

3033

if use_dbus:

2202

client_class = functools.partial(ClientDBusTransitional,

2203

bus = bus)

3034

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

2204

3035

2205

3036

client_settings = Client.config_parser(client_config)

2206

3037

old_client_settings = {}

2207

3038

clients_data = {}

2208

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()

3047

2209

3048

# Get client data and settings from last running state.

2210

3049

if server_settings["restore"]:

2211

3050

try:

2212

3051

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

2213

clients_data, old_client_settings = (pickle.load

2214

(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"))

2215

3097

os.remove(stored_state_path)

2216

3098

except IOError as e:

2217

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

2218

.format(e))

2219

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)

2220

3105

raise

3106

except EOFError as e:

3107

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

3108

"EOFError:",

3109

exc_info=e)

2221

3110

2222

3111

with PGPEngine() as pgp:

2223

for client_name, client in clients_data.iteritems():

3112

for client_name, client in clients_data.items():

3113

# Skip removed clients

3114

if client_name not in client_settings:

3115

continue

3116

2224

3117

# Decide which value to use after restoring saved state.

2225

3118

# We have three different values: Old config file,

2226

3119

# new config file, and saved state.

2231

3124

# For each value in new config, check if it

2232

3125

# differs from the old config value (Except for

2233

3126

# the "secret" attribute)

2234

if (name != "secret" and

2235

value != old_client_settings[client_name]

2236

[name]):

3127

if (name != "secret"

3128

and (value !=

3129

old_client_settings[client_name][name])):

2237

3130

client[name] = value

2238

3131

except KeyError:

2239

3132

pass

2240

3133

2241

3134

# Clients who has passed its expire date can still be

2242

# enabled if its last checker was successful. Clients

2243

# whose checker failed before we stored its state is

2244

# assumed to have failed all checkers during downtime.

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.

2245

3139

if client["enabled"]:

2246

3140

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

2247

3141

if not client["last_checked_ok"]:

2248

3142

logger.warning(

2249

"disabling client {0} - Client never "

2250

"performed a successfull checker"

2251

.format(client["name"]))

3143

"disabling client {} - Client never "

3144

"performed a successful checker".format(

3145

client_name))

2252

3146

client["enabled"] = False

2253

3147

elif client["last_checker_status"] != 0:

2254

3148

logger.warning(

2255

"disabling client {0} - Client "

2256

"last checker failed with error code {1}"

2257

.format(client["name"],

2258

client["last_checker_status"]))

3149

"disabling client {} - Client last"

3150

" checker failed with error code"

3151

" {}".format(

3152

client_name,

3153

client["last_checker_status"]))

2259

3154

client["enabled"] = False

2260

3155

else:

2261

client["expires"] = (datetime.datetime

2262

.utcnow()

2263

+ client["timeout"])

2264

3156

client["expires"] = (

3157

datetime.datetime.utcnow()

3158

+ client["timeout"])

3159

logger.debug("Last checker succeeded,"

3160

" keeping {} enabled".format(

3161

client_name))

2265

3162

try:

2266

client["secret"] = (

2267

pgp.decrypt(client["encrypted_secret"],

2268

client_settings[client_name]

2269

["secret"]))

3163

client["secret"] = pgp.decrypt(

3164

client["encrypted_secret"],

3165

client_settings[client_name]["secret"])

2270

3166

except PGPError:

2271

3167

# If decryption fails, we use secret from new settings

2272

logger.debug("Failed to decrypt {0} old secret"

2273

.format(client_name))

2274

client["secret"] = (

2275

client_settings[client_name]["secret"])

2276

3168

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

3169

client_name))

3170

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

3171

["secret"])

2277

3172

2278

3173

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

2279

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

3174

for client_name in (set(old_client_settings)

3175

- set(client_settings)):

2280

3176

del clients_data[client_name]

2281

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

3177

for client_name in (set(client_settings)

3178

- set(old_client_settings)):

2282

3179

clients_data[client_name] = client_settings[client_name]

2283

2284

# Create clients all clients

2285

for client_name, client in clients_data.iteritems():

3180

3181

# Create all client objects

3182

for client_name, client in clients_data.items():

2286

3183

tcp_server.clients[client_name] = client_class(

2287

name = client_name, settings = client)

3184

name = client_name,

3185

settings = client,

3186

server_settings = server_settings)

2288

3187

2289

3188

if not tcp_server.clients:

2290

3189

logger.warning("No clients defined")

2291

2292

if not debug:

2293

try:

2294

with pidfile:

2295

pid = os.getpid()

2296

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

2297

del pidfile

2298

except IOError:

2299

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

2300

pidfilename, pid)

2301

except NameError:

2302

# "pidfile" was never created

2303

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

2304

3201

del pidfilename

2305

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

2306

3202

2307

3203

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

2308

3204

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

2309

3205

2310

3206

if use_dbus:

2311

class MandosDBusService(dbus.service.Object):

3207

3208

@alternate_dbus_interfaces(

3209

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

3210

class MandosDBusService(DBusObjectWithObjectManager):

2312

3211

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

3212

2313

3213

def __init__(self):

2314

3214

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

3215

2315

3216

_interface = "se.recompile.Mandos"

2316

3217

2317

3218

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

2324

3225

"D-Bus signal"

2325

3226

pass

2326

3227

3228

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

3229

"true"})

2327

3230

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

2328

3231

def ClientRemoved(self, objpath, name):

2329

3232

"D-Bus signal"

2330

3233

pass

2331

3234

3235

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

3236

"true"})

2332

3237

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

2333

3238

def GetAllClients(self):

2334

3239

"D-Bus method"

2335

return dbus.Array(c.dbus_object_path

2336

for c in

2337

tcp_server.clients.itervalues())

3240

return dbus.Array(c.dbus_object_path for c in

3241

tcp_server.clients.values())

2338

3242

3243

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

3244

"true"})

2339

3245

@dbus.service.method(_interface,

2340

3246

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

2341

3247

def GetAllClientsWithProperties(self):

2342

3248

"D-Bus method"

2343

3249

return dbus.Dictionary(

2344

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

2345

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

3250

{ c.dbus_object_path: c.GetAll(

3251

"se.recompile.Mandos.Client")

3252

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

2346

3253

signature="oa{sv}")

2347

3254

2348

3255

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

2349

3256

def RemoveClient(self, object_path):

2350

3257

"D-Bus method"

2351

for c in tcp_server.clients.itervalues():

3258

for c in tcp_server.clients.values():

2352

3259

if c.dbus_object_path == object_path:

2353

3260

del tcp_server.clients[c.name]

2354

3261

c.remove_from_connection()

2355

# Don't signal anything except ClientRemoved

3262

# Don't signal the disabling

2356

3263

c.disable(quiet=True)

2357

# Emit D-Bus signal

2358

self.ClientRemoved(object_path, c.name)

3264

# Emit D-Bus signal for removal

3265

self.client_removed_signal(c)

2359

3266

return

2360

3267

raise KeyError(object_path)

2361

3268

2362

3269

del _interface

3270

3271

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3272

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

3273

def GetManagedObjects(self):

3274

"""D-Bus method"""

3275

return dbus.Dictionary(

3276

{ client.dbus_object_path:

3277

dbus.Dictionary(

3278

{ interface: client.GetAll(interface)

3279

for interface in

3280

client._get_all_interface_names()})

3281

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

3282

3283

def client_added_signal(self, client):

3284

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

3285

if use_dbus:

3286

# New standard signal

3287

self.InterfacesAdded(

3288

client.dbus_object_path,

3289

dbus.Dictionary(

3290

{ interface: client.GetAll(interface)

3291

for interface in

3292

client._get_all_interface_names()}))

3293

# Old signal

3294

self.ClientAdded(client.dbus_object_path)

3295

3296

def client_removed_signal(self, client):

3297

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

3298

if use_dbus:

3299

# New standard signal

3300

self.InterfacesRemoved(

3301

client.dbus_object_path,

3302

client._get_all_interface_names())

3303

# Old signal

3304

self.ClientRemoved(client.dbus_object_path,

3305

client.name)

2363

3306

2364

class MandosDBusServiceTransitional(MandosDBusService):

2365

__metaclass__ = AlternateDBusNamesMetaclass

2366

mandos_dbus_service = MandosDBusServiceTransitional()

3307

mandos_dbus_service = MandosDBusService()

2367

3308

2368

3309

def cleanup():

2369

3310

"Cleanup function; run on exit"

2370

service.cleanup()

3311

if zeroconf:

3312

service.cleanup()

2371

3313

2372

3314

multiprocessing.active_children()

3315

wnull.close()

2373

3316

if not (tcp_server.clients or client_settings):

2374

3317

return

2375

3318

2378

3321

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

2379

3322

clients = {}

2380

3323

with PGPEngine() as pgp:

2381

for client in tcp_server.clients.itervalues():

3324

for client in tcp_server.clients.values():

2382

3325

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

2383

3326

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

2384

3327

key)

2386

3329

2387

3330

# A list of attributes that can not be pickled

2388

3331

# + secret.

2389

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

2390

"checker"))

2391

for name, typ in (inspect.getmembers

2392

(dbus.service.Object)):

3332

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

3333

"checker", "server_settings" }

3334

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

3335

.Object):

2393

3336

exclude.add(name)

2394

3337

2395

3338

client_dict["encrypted_secret"] = (client

2402

3345

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

2403

3346

2404

3347

try:

2405

with os.fdopen(os.open(stored_state_path,

2406

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

2407

0600), "wb") as stored_state:

2408

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

3348

with tempfile.NamedTemporaryFile(

3349

mode='wb',

3350

suffix=".pickle",

3351

prefix='clients-',

3352

dir=os.path.dirname(stored_state_path),

3353

delete=False) as stored_state:

3354

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

3355

protocol = 2)

3356

tempname = stored_state.name

3357

os.rename(tempname, stored_state_path)

2409

3358

except (IOError, OSError) as e:

2410

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

2411

.format(e))

2412

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

3359

if not debug:

3360

try:

3361

os.remove(tempname)

3362

except NameError:

3363

pass

3364

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

3365

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

3366

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

3367

else:

3368

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

3369

exc_info=e)

2413

3370

raise

2414

3371

2415

3372

# Delete all clients, and settings from config

2417

3374

name, client = tcp_server.clients.popitem()

2418

3375

if use_dbus:

2419

3376

client.remove_from_connection()

2420

# Don't signal anything except ClientRemoved

3377

# Don't signal the disabling

2421

3378

client.disable(quiet=True)

3379

# Emit D-Bus signal for removal

2422

3380

if use_dbus:

2423

# Emit D-Bus signal

2424

mandos_dbus_service.ClientRemoved(client

2425

.dbus_object_path,

2426

client.name)

3381

mandos_dbus_service.client_removed_signal(client)

2427

3382

client_settings.clear()

2428

3383

2429

3384

atexit.register(cleanup)

2430

3385

2431

for client in tcp_server.clients.itervalues():

3386

for client in tcp_server.clients.values():

2432

3387

if use_dbus:

2433

# Emit D-Bus signal

2434

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3388

# Emit D-Bus signal for adding

3389

mandos_dbus_service.client_added_signal(client)

2435

3390

# Need to initiate checking of clients

2436

3391

if client.enabled:

2437

3392

client.init_checker()

2440

3395

tcp_server.server_activate()

2441

3396

2442

3397

# Find out what port we got

2443

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

3398

if zeroconf:

3399

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

2444

3400

if use_ipv6:

2445

3401

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

2446

" flowinfo %d, scope_id %d"

2447

% tcp_server.socket.getsockname())

3402

" flowinfo %d, scope_id %d",

3403

*tcp_server.socket.getsockname())

2448

3404

else: # IPv4

2449

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

2450

% tcp_server.socket.getsockname())

3405

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

3406

*tcp_server.socket.getsockname())

2451

3407

2452

3408

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

2453

3409

2454

3410

try:

2455

# From the Avahi example code

2456

try:

2457

service.activate()

2458

except dbus.exceptions.DBusException as error:

2459

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

2460

cleanup()

2461

sys.exit(1)

2462

# End of Avahi example code

3411

if zeroconf:

3412

# From the Avahi example code

3413

try:

3414

service.activate()

3415

except dbus.exceptions.DBusException as error:

3416

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

3417

cleanup()

3418

sys.exit(1)

3419

# End of Avahi example code

2463

3420

2464

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

2465

lambda *args, **kwargs:

2466

(tcp_server.handle_request

2467

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

3421

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

3422

lambda *args, **kwargs:

3423

(tcp_server.handle_request

3424

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

2468

3425

2469

3426

logger.debug("Starting main loop")

2470

3427

main_loop.run()

2471

3428

except AvahiError as error:

2472

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

3429

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

2473

3430

cleanup()

2474

3431

sys.exit(1)

2475

3432

except KeyboardInterrupt:

2480

3437

# Must run before the D-Bus bus name gets deregistered

2481

3438

cleanup()

2482

3439

3440

2483

3441

if __name__ == '__main__':

2484

3442

main()