/mandos/trunk : revision 237.4.29

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#!/usr/bin/python2.7

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#!/usr/bin/python

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

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#

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

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

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#

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# Everything else is

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#

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

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

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import SocketServer as socketserver

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import socket

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import argparse

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import datetime

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import ConfigParser as configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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try:

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import gobject

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except ImportError:

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from gi.repository import GObject as gobject

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import gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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version = "1.5.3"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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

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"""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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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.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet',

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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

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with open(os.devnull) as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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

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with open(os.devnull) as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return decrypted_plaintext

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class AvahiError(Exception):

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

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self.value = value

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

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**kwargs)

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

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def __unicode__(self):

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return unicode(repr(self.value))

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self, remove=True):

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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self.name)

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if remove:

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self.remove()

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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

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

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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356

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def entry_group_state_changed(self, state, error):

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

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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str(error))

368

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

369

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unicode(error))

324

raise AvahiGroupError("State changed: %s"

325

% unicode(error))

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def cleanup(self):

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

372

328

if self.group is not None:

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pass

378

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self.group = None

379

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self.remove()

380

381

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

382

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

383

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

384

bad_states = {

385

avahi.SERVER_INVALID: "Zeroconf server invalid",

386

avahi.SERVER_REGISTERING: None,

387

avahi.SERVER_COLLISION: "Zeroconf server name collision",

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avahi.SERVER_FAILURE: "Zeroconf server failure",

389

}

339

bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

341

avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

344

avahi.SERVER_FAILURE:

345

"Zeroconf server failure" }

390

346

if state in bad_states:

391

347

if bad_states[state] is not None:

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if error is None:

395

351

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

396

352

self.cleanup()

397

353

elif state == avahi.SERVER_RUNNING:

398

try:

399

self.add()

400

except dbus.exceptions.DBusException as error:

401

if (error.get_dbus_name()

402

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

403

logger.info("Local Zeroconf service name"

404

" collision.")

405

return self.rename(remove=False)

406

else:

407

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

408

self.cleanup()

409

os._exit(1)

354

self.add()

410

355

else:

411

356

if error is None:

412

357

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

413

358

else:

414

359

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

415

416

360

def activate(self):

417

361

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

418

362

if self.server is None:

422

366

follow_name_owner_changes=True),

423

367

avahi.DBUS_INTERFACE_SERVER)

424

368

self.server.connect_to_signal("StateChanged",

425

self.server_state_changed)

369

self.server_state_changed)

426

370

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

427

371

428

429

372

class AvahiServiceToSyslog(AvahiService):

430

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

373

def rename(self):

431

374

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

432

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

433

syslogger.setFormatter(logging.Formatter(

434

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

435

.format(self.name)))

375

ret = AvahiService.rename(self)

376

syslogger.setFormatter(logging.Formatter

377

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

378

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

379

% self.name))

436

380

return ret

437

381

438

def call_pipe(connection, # : multiprocessing.Connection

439

func, *args, **kwargs):

440

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

441

442

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

443

return value on the provided multiprocessing.Connection.

444

"""

445

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

446

connection.close()

447

382

def timedelta_to_milliseconds(td):

383

"Convert a datetime.timedelta() to milliseconds"

384

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

385

+ (td.seconds * 1000)

386

+ (td.microseconds // 1000))

387

448

388

class Client(object):

449

389

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

450

390

476

416

last_checker_status: integer between 0 and 255 reflecting exit

477

417

status of last checker. -1 reflects crashed

478

418

checker, -2 means no checker completed yet.

479

last_checker_signal: The signal which killed the last checker, if

480

last_checker_status is -1

481

419

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

482

420

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

483

421

D-Bus identifiers

488

426

runtime_expansions: Allowed attributes for runtime expansion.

489

427

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

490

428

disabled, or None

491

server_settings: The server_settings dict from main()

492

429

"""

493

430

494

431

runtime_expansions = ("approval_delay", "approval_duration",

495

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

496

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

497

"last_approval_request", "last_checked_ok",

432

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

433

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

498

434

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

499

client_defaults = {

500

"timeout": "PT5M",

501

"extended_timeout": "PT15M",

502

"interval": "PT2M",

503

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

504

"host": "",

505

"approval_delay": "PT0S",

506

"approval_duration": "PT1S",

507

"approved_by_default": "True",

508

"enabled": "True",

509

}

510

435

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

436

"extended_timeout": "15m",

437

"interval": "2m",

438

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

439

"host": "",

440

"approval_delay": "0s",

441

"approval_duration": "1s",

442

"approved_by_default": "True",

443

"enabled": "True",

444

}

445

446

def timeout_milliseconds(self):

447

"Return the 'timeout' attribute in milliseconds"

448

return timedelta_to_milliseconds(self.timeout)

449

450

def extended_timeout_milliseconds(self):

451

"Return the 'extended_timeout' attribute in milliseconds"

452

return timedelta_to_milliseconds(self.extended_timeout)

453

454

def interval_milliseconds(self):

455

"Return the 'interval' attribute in milliseconds"

456

return timedelta_to_milliseconds(self.interval)

457

458

def approval_delay_milliseconds(self):

459

return timedelta_to_milliseconds(self.approval_delay)

460

511

461

@staticmethod

512

462

def config_parser(config):

513

463

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

528

478

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

529

479

"enabled")

530

480

531

# Uppercase and remove spaces from fingerprint for later

532

# comparison purposes with return value from the

533

# fingerprint() function

534

481

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

535

482

.replace(" ", ""))

536

483

if "secret" in section:

541

488

"rb") as secfile:

542

489

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

543

490

else:

544

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

545

.format(section))

491

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

492

% section)

546

493

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

547

494

client["extended_timeout"] = string_to_delta(

548

495

section["extended_timeout"])

557

504

client["last_checker_status"] = -2

558

505

559

506

return settings

560

561

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

507

508

509

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

510

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

511

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

512

attribute."""

562

513

self.name = name

563

if server_settings is None:

564

server_settings = {}

565

self.server_settings = server_settings

566

514

# adding all client settings

567

for setting, value in settings.items():

515

for setting, value in settings.iteritems():

568

516

setattr(self, setting, value)

569

517

570

518

if self.enabled:

576

524

else:

577

525

self.last_enabled = None

578

526

self.expires = None

579

527

580

528

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

529

# Uppercase and remove spaces from fingerprint for later

530

# comparison purposes with return value from the fingerprint()

531

# function

581

532

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

582

533

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

583

534

datetime.datetime.utcnow())

584

535

585

536

# attributes specific for this server instance

586

537

self.checker = None

587

538

self.checker_initiator_tag = None

590

541

self.current_checker_command = None

591

542

self.approved = None

592

543

self.approvals_pending = 0

593

self.changedstate = multiprocessing_manager.Condition(

594

multiprocessing_manager.Lock())

595

self.client_structure = [attr

596

for attr in self.__dict__.iterkeys()

544

self.changedstate = (multiprocessing_manager

545

.Condition(multiprocessing_manager

546

.Lock()))

547

self.client_structure = [attr for attr in

548

self.__dict__.iterkeys()

597

549

if not attr.startswith("_")]

598

550

self.client_structure.append("client_structure")

599

551

600

for name, t in inspect.getmembers(

601

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

552

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

553

lambda obj:

554

isinstance(obj,

555

property)):

602

556

if not name.startswith("_"):

603

557

self.client_structure.append(name)

604

558

612

566

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

613

567

# Already enabled

614

568

return

569

self.send_changedstate()

615

570

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

616

571

self.enabled = True

617

572

self.last_enabled = datetime.datetime.utcnow()

618

573

self.init_checker()

619

self.send_changedstate()

620

574

621

575

def disable(self, quiet=True):

622

576

"""Disable this client."""

623

577

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

624

578

return False

625

579

if not quiet:

580

self.send_changedstate()

581

if not quiet:

626

582

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

627

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

583

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

628

584

gobject.source_remove(self.disable_initiator_tag)

629

585

self.disable_initiator_tag = None

630

586

self.expires = None

631

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

587

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

632

588

gobject.source_remove(self.checker_initiator_tag)

633

589

self.checker_initiator_tag = None

634

590

self.stop_checker()

635

591

self.enabled = False

636

if not quiet:

637

self.send_changedstate()

638

592

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

639

593

return False

640

594

644

598

def init_checker(self):

645

599

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

646

600

# and every interval from then on.

647

if self.checker_initiator_tag is not None:

648

gobject.source_remove(self.checker_initiator_tag)

649

self.checker_initiator_tag = gobject.timeout_add(

650

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

651

self.start_checker)

601

self.checker_initiator_tag = (gobject.timeout_add

602

(self.interval_milliseconds(),

603

self.start_checker))

652

604

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

653

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = gobject.timeout_add(

656

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

605

self.disable_initiator_tag = (gobject.timeout_add

606

(self.timeout_milliseconds(),

607

self.disable))

657

608

# Also start a new checker *right now*.

658

609

self.start_checker()

659

610

660

def checker_callback(self, source, condition, connection,

661

command):

611

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

662

612

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

663

613

self.checker_callback_tag = None

664

614

self.checker = None

665

# Read return code from connection (see call_pipe)

666

returncode = connection.recv()

667

connection.close()

668

669

if returncode >= 0:

670

self.last_checker_status = returncode

671

self.last_checker_signal = None

615

if os.WIFEXITED(condition):

616

self.last_checker_status = os.WEXITSTATUS(condition)

672

617

if self.last_checker_status == 0:

673

618

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

674

619

vars(self))

675

620

self.checked_ok()

676

621

else:

677

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

622

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

623

vars(self))

678

624

else:

679

625

self.last_checker_status = -1

680

self.last_checker_signal = -returncode

681

626

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

682

627

vars(self))

683

return False

684

628

685

629

def checked_ok(self):

686

630

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

687

631

self.last_checked_ok = datetime.datetime.utcnow()

688

632

self.last_checker_status = 0

689

self.last_checker_signal = None

690

633

self.bump_timeout()

691

634

692

635

def bump_timeout(self, timeout=None):

695

638

timeout = self.timeout

696

639

if self.disable_initiator_tag is not None:

697

640

gobject.source_remove(self.disable_initiator_tag)

698

self.disable_initiator_tag = None

699

641

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

700

self.disable_initiator_tag = gobject.timeout_add(

701

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

642

self.disable_initiator_tag = (gobject.timeout_add

643

(timedelta_to_milliseconds

644

(timeout), self.disable))

702

645

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

703

646

704

647

def need_approval(self):

710

653

If a checker already exists, leave it running and do

711

654

nothing."""

712

655

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

713

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

714

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

715

# would inevitably timeout, since no checker would get a

716

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

656

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

657

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

658

# client would inevitably timeout, since no checker would get

659

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

717

660

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

718

661

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

719

662

# should be.

720

663

721

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

722

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

723

self.checker.join()

724

self.checker = None

664

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

665

try:

666

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

667

except (AttributeError, OSError) as error:

668

if (isinstance(error, OSError)

669

and error.errno != errno.ECHILD):

670

raise error

671

else:

672

if pid:

673

logger.warning("Checker was a zombie")

674

gobject.source_remove(self.checker_callback_tag)

675

self.checker_callback(pid, status,

676

self.current_checker_command)

725

677

# Start a new checker if needed

726

678

if self.checker is None:

727

# Escape attributes for the shell

728

escaped_attrs = {

729

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

730

for attr in self.runtime_expansions }

731

679

try:

732

command = self.checker_command % escaped_attrs

733

except TypeError as error:

734

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

735

self.checker_command,

736

exc_info=error)

737

return True # Try again later

680

# In case checker_command has exactly one % operator

681

command = self.checker_command % self.host

682

except TypeError:

683

# Escape attributes for the shell

684

escaped_attrs = dict(

685

(attr,

686

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

687

errors=

688

'replace')))

689

for attr in

690

self.runtime_expansions)

691

692

try:

693

command = self.checker_command % escaped_attrs

694

except TypeError as error:

695

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

696

' %s', self.checker_command, error)

697

return True # Try again later

738

698

self.current_checker_command = command

739

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

740

self.name)

741

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

742

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

743

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

744

# always replaced by /dev/null.)

745

# The exception is when not debugging but nevertheless

746

# running in the foreground; use the previously

747

# created wnull.

748

popen_args = { "close_fds": True,

749

"shell": True,

750

"cwd": "/" }

751

if (not self.server_settings["debug"]

752

and self.server_settings["foreground"]):

753

popen_args.update({"stdout": wnull,

754

"stderr": wnull })

755

pipe = multiprocessing.Pipe(duplex = False)

756

self.checker = multiprocessing.Process(

757

target = call_pipe,

758

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

759

kwargs = popen_args)

760

self.checker.start()

761

self.checker_callback_tag = gobject.io_add_watch(

762

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

763

self.checker_callback, pipe[0], command)

699

try:

700

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

701

command, self.name)

702

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

703

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

704

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

705

# always replaced by /dev/null.)

706

self.checker = subprocess.Popen(command,

707

close_fds=True,

708

shell=True, cwd="/")

709

self.checker_callback_tag = (gobject.child_watch_add

710

(self.checker.pid,

711

self.checker_callback,

712

data=command))

713

# The checker may have completed before the gobject

714

# watch was added. Check for this.

715

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

716

if pid:

717

gobject.source_remove(self.checker_callback_tag)

718

self.checker_callback(pid, status, command)

719

except OSError as error:

720

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

721

error)

764

722

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

765

723

return True

766

724

772

730

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

773

731

return

774

732

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

775

self.checker.terminate()

733

try:

734

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

735

#time.sleep(0.5)

736

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

737

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

738

except OSError as error:

739

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

740

raise

776

741

self.checker = None

777

742

778

743

779

def dbus_service_property(dbus_interface,

780

signature="v",

781

access="readwrite",

782

byte_arrays=False):

744

def dbus_service_property(dbus_interface, signature="v",

745

access="readwrite", byte_arrays=False):

783

746

"""Decorators for marking methods of a DBusObjectWithProperties to

784

747

become properties on the D-Bus.

785

748

794

757

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

795

758

if byte_arrays and signature != "ay":

796

759

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

797

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

798

760

" signature %r" % signature)

799

761

def decorator(func):

800

762

func._dbus_is_property = True

801

763

func._dbus_interface = dbus_interface

806

768

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

807

769

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

808

770

return func

809

810

return decorator

811

812

813

def dbus_interface_annotations(dbus_interface):

814

"""Decorator for marking functions returning interface annotations

815

816

Usage:

817

818

@dbus_interface_annotations("org.example.Interface")

819

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

820

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

821

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

822

"false"}

823

"""

824

825

def decorator(func):

826

func._dbus_is_interface = True

827

func._dbus_interface = dbus_interface

828

func._dbus_name = dbus_interface

829

return func

830

831

return decorator

832

833

834

def dbus_annotations(annotations):

835

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

836

Usage:

837

838

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

839

"org.freedesktop.DBus.Property."

840

"EmitsChangedSignal": "false"})

841

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

842

access="r")

843

def Property_dbus_property(self):

844

return dbus.Boolean(False)

845

"""

846

847

def decorator(func):

848

func._dbus_annotations = annotations

849

return func

850

851

771

return decorator

852

772

853

773

854

774

class DBusPropertyException(dbus.exceptions.DBusException):

855

775

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

856

776

"""

857

pass

777

def __unicode__(self):

778

return unicode(str(self))

858

779

859

780

860

781

class DBusPropertyAccessException(DBusPropertyException):

878

799

"""

879

800

880

801

@staticmethod

881

def _is_dbus_thing(thing):

882

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

883

884

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

885

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

886

"""

887

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

888

False)

802

def _is_dbus_property(obj):

803

return getattr(obj, "_dbus_is_property", False)

889

804

890

def _get_all_dbus_things(self, thing):

805

def _get_all_dbus_properties(self):

891

806

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

892

807

"""

893

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

894

athing.__get__(self))

808

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

895

809

for cls in self.__class__.__mro__

896

for name, athing in

897

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

810

for name, prop in

811

inspect.getmembers(cls, self._is_dbus_property))

898

812

899

813

def _get_dbus_property(self, interface_name, property_name):

900

814

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

901

815

property with the specified name and interface.

902

816

"""

903

for cls in self.__class__.__mro__:

904

for name, value in inspect.getmembers(

905

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

817

for cls in self.__class__.__mro__:

818

for name, value in (inspect.getmembers

819

(cls, self._is_dbus_property)):

906

820

if (value._dbus_name == property_name

907

821

and value._dbus_interface == interface_name):

908

822

return value.__get__(self)

909

823

910

824

# No such property

911

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

912

self.dbus_object_path, interface_name, property_name))

825

raise DBusPropertyNotFound(self.dbus_object_path + ":"

826

+ interface_name + "."

827

+ property_name)

913

828

914

@dbus.service.method(dbus.PROPERTIES_IFACE,

915

in_signature="ss",

829

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

916

830

out_signature="v")

917

831

def Get(self, interface_name, property_name):

918

832

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

936

850

# The byte_arrays option is not supported yet on

937

851

# signatures other than "ay".

938

852

if prop._dbus_signature != "ay":

939

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

940

"'ay' signature {!r}"

941

.format(prop._dbus_signature))

853

raise ValueError

942

854

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

943

855

for byte in value))

944

856

prop(value)

945

857

946

@dbus.service.method(dbus.PROPERTIES_IFACE,

947

in_signature="s",

858

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

948

859

out_signature="a{sv}")

949

860

def GetAll(self, interface_name):

950

861

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

953

864

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

954

865

"""

955

866

properties = {}

956

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

867

for name, prop in self._get_all_dbus_properties():

957

868

if (interface_name

958

869

and interface_name != prop._dbus_interface):

959

870

# Interface non-empty but did not match

965

876

if not hasattr(value, "variant_level"):

966

877

properties[name] = value

967

878

continue

968

properties[name] = type(value)(

969

value, variant_level = value.variant_level + 1)

879

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

880

value.variant_level+1)

970

881

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

971

882

972

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

973

def PropertiesChanged(self, interface_name, changed_properties,

974

invalidated_properties):

975

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

976

standard.

977

"""

978

pass

979

980

883

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

981

884

out_signature="s",

982

885

path_keyword='object_path',

983

886

connection_keyword='connection')

984

887

def Introspect(self, object_path, connection):

985

"""Overloading of standard D-Bus method.

986

987

Inserts property tags and interface annotation tags.

888

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

988

889

"""

989

890

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

990

891

connection)

991

892

try:

992

893

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

993

994

894

def make_tag(document, name, prop):

995

895

e = document.createElement("property")

996

896

e.setAttribute("name", name)

997

897

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

998

898

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

999

899

return e

1000

1001

900

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

1002

# Add property tags

1003

901

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

1004

902

for name, prop

1005

in self._get_all_dbus_things("property")

903

in self._get_all_dbus_properties()

1006

904

if prop._dbus_interface

1007

905

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

1008

906

if_tag.appendChild(tag)

1009

# Add annotation tags

1010

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

1011

for tag in if_tag.getElementsByTagName(typ):

1012

annots = dict()

1013

for name, prop in (self.

1014

_get_all_dbus_things(typ)):

1015

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

1016

and prop._dbus_interface

1017

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

1018

annots.update(getattr(

1019

prop, "_dbus_annotations", {}))

1020

for name, value in annots.items():

1021

ann_tag = document.createElement(

1022

"annotation")

1023

ann_tag.setAttribute("name", name)

1024

ann_tag.setAttribute("value", value)

1025

tag.appendChild(ann_tag)

1026

# Add interface annotation tags

1027

for annotation, value in dict(

1028

itertools.chain.from_iterable(

1029

annotations().items()

1030

for name, annotations

1031

in self._get_all_dbus_things("interface")

1032

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

1033

)).items():

1034

ann_tag = document.createElement("annotation")

1035

ann_tag.setAttribute("name", annotation)

1036

ann_tag.setAttribute("value", value)

1037

if_tag.appendChild(ann_tag)

1038

907

# Add the names to the return values for the

1039

908

# "org.freedesktop.DBus.Properties" methods

1040

909

if (if_tag.getAttribute("name")

1055

924

except (AttributeError, xml.dom.DOMException,

1056

925

xml.parsers.expat.ExpatError) as error:

1057

926

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

1058

exc_info=error)

927

error)

1059

928

return xmlstring

1060

929

1061

930

1062

def datetime_to_dbus(dt, variant_level=0):

931

def datetime_to_dbus (dt, variant_level=0):

1063

932

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

1064

933

if dt is None:

1065

934

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

1066

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

1067

1068

1069

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1070

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

1071

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

1072

interface names according to the "alt_interface_names" mapping.

1073

Usage:

1074

1075

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

1076

"net.example.AlternateInterface"})

1077

class SampleDBusObject(dbus.service.Object):

1078

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

1079

def SampleDBusMethod():

1080

pass

1081

1082

The above "SampleDBusMethod" on "SampleDBusObject" will be

1083

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

1084

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

1085

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

1086

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

1087

1088

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

1089

(from DBusObjectWithProperties) and interfaces (from the

1090

dbus_interface_annotations decorator).

935

return dbus.String(dt.isoformat(),

936

variant_level=variant_level)

937

938

939

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

940

.__metaclass__):

941

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

942

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

1091

943

"""

1092

1093

def wrapper(cls):

1094

for orig_interface_name, alt_interface_name in (

1095

alt_interface_names.items()):

1096

attr = {}

1097

interface_names = set()

1098

# Go though all attributes of the class

1099

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

944

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

945

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

946

# methods, signals, or properties in them

947

for base in (b for b in bases

948

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

949

# Go though all attributes of the base class

950

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

1100

951

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

1101

952

# with the wrong interface name

1102

953

if (not hasattr(attribute, "_dbus_interface")

1103

or not attribute._dbus_interface.startswith(

1104

orig_interface_name)):

954

or not attribute._dbus_interface

955

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

1105

956

continue

1106

957

# Create an alternate D-Bus interface name based on

1107

958

# the current name

1108

alt_interface = attribute._dbus_interface.replace(

1109

orig_interface_name, alt_interface_name)

1110

interface_names.add(alt_interface)

959

alt_interface = (attribute._dbus_interface

960

.replace("se.recompile.Mandos",

961

"se.bsnet.fukt.Mandos"))

1111

962

# Is this a D-Bus signal?

1112

963

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

1113

if sys.version_info.major == 2:

1114

# Extract the original non-method undecorated

1115

# function by black magic

1116

nonmethod_func = (dict(

964

# Extract the original non-method function by

965

# black magic

966

nonmethod_func = (dict(

1117

967

zip(attribute.func_code.co_freevars,

1118

attribute.__closure__))

1119

["func"].cell_contents)

1120

else:

1121

nonmethod_func = attribute

968

attribute.__closure__))["func"]

969

.cell_contents)

1122

970

# Create a new, but exactly alike, function

1123

971

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

1124

972

# with the alternate D-Bus interface name

1125

if sys.version_info.major == 2:

1126

new_function = types.FunctionType(

1127

nonmethod_func.func_code,

1128

nonmethod_func.func_globals,

1129

nonmethod_func.func_name,

1130

nonmethod_func.func_defaults,

1131

nonmethod_func.func_closure)

1132

else:

1133

new_function = types.FunctionType(

1134

nonmethod_func.__code__,

1135

nonmethod_func.__globals__,

1136

nonmethod_func.__name__,

1137

nonmethod_func.__defaults__,

1138

nonmethod_func.__closure__)

1139

new_function = (dbus.service.signal(

1140

alt_interface,

1141

attribute._dbus_signature)(new_function))

1142

# Copy annotations, if any

1143

try:

1144

new_function._dbus_annotations = dict(

1145

attribute._dbus_annotations)

1146

except AttributeError:

1147

pass

973

new_function = (dbus.service.signal

974

(alt_interface,

975

attribute._dbus_signature)

976

(types.FunctionType(

977

nonmethod_func.func_code,

978

nonmethod_func.func_globals,

979

nonmethod_func.func_name,

980

nonmethod_func.func_defaults,

981

nonmethod_func.func_closure)))

1148

982

# Define a creator of a function to call both the

1149

# original and alternate functions, so both the

1150

# original and alternate signals gets sent when

1151

# the function is called

983

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

984

# signals gets sent when the function is called

1152

985

def fixscope(func1, func2):

1153

986

"""This function is a scope container to pass

1154

987

func1 and func2 to the "call_both" function

1155

988

outside of its arguments"""

1156

1157

989

def call_both(*args, **kwargs):

1158

990

"""This function will emit two D-Bus

1159

991

signals by calling func1 and func2"""

1160

992

func1(*args, **kwargs)

1161

993

func2(*args, **kwargs)

1162

1163

994

return call_both

1164

995

# Create the "call_both" function and add it to

1165

996

# the class

1166

attr[attrname] = fixscope(attribute, new_function)

997

attr[attrname] = fixscope(attribute,

998

new_function)

1167

999

# Is this a D-Bus method?

1168

1000

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

1169

1001

# Create a new, but exactly alike, function

1170

1002

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

1171

1003

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

1172

1004

# to the class.

1173

attr[attrname] = (

1174

dbus.service.method(

1175

alt_interface,

1176

attribute._dbus_in_signature,

1177

attribute._dbus_out_signature)

1178

(types.FunctionType(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1183

# Copy annotations, if any

1184

try:

1185

attr[attrname]._dbus_annotations = dict(

1186

attribute._dbus_annotations)

1187

except AttributeError:

1188

pass

1005

attr[attrname] = (dbus.service.method

1006

(alt_interface,

1007

attribute._dbus_in_signature,

1008

attribute._dbus_out_signature)

1009

(types.FunctionType

1010

(attribute.func_code,

1011

attribute.func_globals,

1012

attribute.func_name,

1013

attribute.func_defaults,

1014

attribute.func_closure)))

1189

1015

# Is this a D-Bus property?

1190

1016

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

1191

1017

# Create a new, but exactly alike, function

1192

1018

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

1193

1019

# property with the alternate D-Bus interface

1194

1020

# name. Add it to the class.

1195

attr[attrname] = (dbus_service_property(

1196

alt_interface, attribute._dbus_signature,

1197

attribute._dbus_access,

1198

attribute._dbus_get_args_options

1199

["byte_arrays"])

1200

(types.FunctionType(

1201

attribute.func_code,

1202

attribute.func_globals,

1203

attribute.func_name,

1204

attribute.func_defaults,

1205

attribute.func_closure)))

1206

# Copy annotations, if any

1207

try:

1208

attr[attrname]._dbus_annotations = dict(

1209

attribute._dbus_annotations)

1210

except AttributeError:

1211

pass

1212

# Is this a D-Bus interface?

1213

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

1214

# Create a new, but exactly alike, function

1215

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

1216

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

1217

# to the class.

1218

attr[attrname] = (

1219

dbus_interface_annotations(alt_interface)

1220

(types.FunctionType(attribute.func_code,

1221

attribute.func_globals,

1222

attribute.func_name,

1223

attribute.func_defaults,

1224

attribute.func_closure)))

1225

if deprecate:

1226

# Deprecate all alternate interfaces

1227

iname="_AlternateDBusNames_interface_annotation{}"

1228

for interface_name in interface_names:

1229

1230

@dbus_interface_annotations(interface_name)

1231

def func(self):

1232

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

1233

"true" }

1234

# Find an unused name

1235

for aname in (iname.format(i)

1236

for i in itertools.count()):

1237

if aname not in attr:

1238

attr[aname] = func

1239

break

1240

if interface_names:

1241

# Replace the class with a new subclass of it with

1242

# methods, signals, etc. as created above.

1243

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

1244

(cls, ), attr)

1245

return cls

1246

1247

return wrapper

1248

1249

1250

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

1251

"se.bsnet.fukt.Mandos"})

1021

attr[attrname] = (dbus_service_property

1022

(alt_interface,

1023

attribute._dbus_signature,

1024

attribute._dbus_access,

1025

attribute

1026

._dbus_get_args_options

1027

["byte_arrays"])

1028

(types.FunctionType

1029

(attribute.func_code,

1030

attribute.func_globals,

1031

attribute.func_name,

1032

attribute.func_defaults,

1033

attribute.func_closure)))

1034

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

1035

1036

1252

1037

class ClientDBus(Client, DBusObjectWithProperties):

1253

1038

"""A Client class using D-Bus

1254

1039

1258

1043

"""

1259

1044

1260

1045

runtime_expansions = (Client.runtime_expansions

1261

+ ("dbus_object_path", ))

1262

1263

_interface = "se.recompile.Mandos.Client"

1046

+ ("dbus_object_path",))

1264

1047

1265

1048

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

1266

1049

1269

1052

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

1270

1053

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

1271

1054

# the D-Bus

1272

client_object_name = str(self.name).translate(

1055

client_object_name = unicode(self.name).translate(

1273

1056

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

1274

1057

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

1275

self.dbus_object_path = dbus.ObjectPath(

1276

"/clients/" + client_object_name)

1058

self.dbus_object_path = (dbus.ObjectPath

1059

("/clients/" + client_object_name))

1277

1060

DBusObjectWithProperties.__init__(self, self.bus,

1278

1061

self.dbus_object_path)

1279

1280

def notifychangeproperty(transform_func, dbus_name,

1281

type_func=lambda x: x,

1282

variant_level=1,

1283

invalidate_only=False,

1284

_interface=_interface):

1062

1063

def notifychangeproperty(transform_func,

1064

dbus_name, type_func=lambda x: x,

1065

variant_level=1):

1285

1066

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

1286

1067

its changes to DBus.

1287

1068

1292

1073

to the D-Bus. Default: no transform

1293

1074

variant_level: D-Bus variant level. Default: 1

1294

1075

"""

1295

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

1296

1076

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

1297

1077

def setter(self, value):

1298

1078

if hasattr(self, "dbus_object_path"):

1299

1079

if (not hasattr(self, attrname) or

1300

1080

type_func(getattr(self, attrname, None))

1301

1081

!= type_func(value)):

1302

if invalidate_only:

1303

self.PropertiesChanged(

1304

_interface, dbus.Dictionary(),

1305

dbus.Array((dbus_name, )))

1306

else:

1307

dbus_value = transform_func(

1308

type_func(value),

1309

variant_level = variant_level)

1310

self.PropertyChanged(dbus.String(dbus_name),

1311

dbus_value)

1312

self.PropertiesChanged(

1313

_interface,

1314

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

1315

dbus_value }),

1316

dbus.Array())

1082

dbus_value = transform_func(type_func(value),

1083

variant_level

1084

=variant_level)

1085

self.PropertyChanged(dbus.String(dbus_name),

1086

dbus_value)

1317

1087

setattr(self, attrname, value)

1318

1088

1319

1089

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

1320

1090

1091

1321

1092

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1322

1093

approvals_pending = notifychangeproperty(dbus.Boolean,

1323

1094

"ApprovalPending",

1325

1096

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

1326

1097

last_enabled = notifychangeproperty(datetime_to_dbus,

1327

1098

"LastEnabled")

1328

checker = notifychangeproperty(

1329

dbus.Boolean, "CheckerRunning",

1330

type_func = lambda checker: checker is not None)

1099

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

1100

type_func = lambda checker:

1101

checker is not None)

1331

1102

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1332

1103

"LastCheckedOK")

1333

1104

last_checker_status = notifychangeproperty(dbus.Int16,

1336

1107

datetime_to_dbus, "LastApprovalRequest")

1337

1108

approved_by_default = notifychangeproperty(dbus.Boolean,

1338

1109

"ApprovedByDefault")

1339

approval_delay = notifychangeproperty(

1340

dbus.UInt64, "ApprovalDelay",

1341

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

1110

approval_delay = notifychangeproperty(dbus.UInt64,

1111

"ApprovalDelay",

1112

type_func =

1113

timedelta_to_milliseconds)

1342

1114

approval_duration = notifychangeproperty(

1343

1115

dbus.UInt64, "ApprovalDuration",

1344

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

1116

type_func = timedelta_to_milliseconds)

1345

1117

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

1346

timeout = notifychangeproperty(

1347

dbus.UInt64, "Timeout",

1348

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

1118

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

1119

type_func =

1120

timedelta_to_milliseconds)

1349

1121

extended_timeout = notifychangeproperty(

1350

1122

dbus.UInt64, "ExtendedTimeout",

1351

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

1352

interval = notifychangeproperty(

1353

dbus.UInt64, "Interval",

1354

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

1123

type_func = timedelta_to_milliseconds)

1124

interval = notifychangeproperty(dbus.UInt64,

1125

"Interval",

1126

type_func =

1127

timedelta_to_milliseconds)

1355

1128

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

1356

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

1357

invalidate_only=True)

1358

1129

1359

1130

del notifychangeproperty

1360

1131

1367

1138

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

1368

1139

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

1369

1140

1370

def checker_callback(self, source, condition,

1371

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

1372

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

1373

connection, command, *args,

1374

**kwargs)

1375

exitstatus = self.last_checker_status

1376

if exitstatus >= 0:

1141

def checker_callback(self, pid, condition, command,

1142

*args, **kwargs):

1143

self.checker_callback_tag = None

1144

self.checker = None

1145

if os.WIFEXITED(condition):

1146

exitstatus = os.WEXITSTATUS(condition)

1377

1147

# Emit D-Bus signal

1378

1148

self.CheckerCompleted(dbus.Int16(exitstatus),

1379

dbus.Int64(0),

1149

dbus.Int64(condition),

1380

1150

dbus.String(command))

1381

1151

else:

1382

1152

# Emit D-Bus signal

1383

1153

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

1384

dbus.Int64(

1385

self.last_checker_signal),

1154

dbus.Int64(condition),

1386

1155

dbus.String(command))

1387

return ret

1156

1157

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

1158

*args, **kwargs)

1388

1159

1389

1160

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

1390

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

1161

old_checker = self.checker

1162

if self.checker is not None:

1163

old_checker_pid = self.checker.pid

1164

else:

1165

old_checker_pid = None

1391

1166

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

1392

1167

# Only if new checker process was started

1393

1168

if (self.checker is not None

1401

1176

return False

1402

1177

1403

1178

def approve(self, value=True):

1179

self.send_changedstate()

1404

1180

self.approved = value

1405

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

1406

* 1000), self._reset_approved)

1407

self.send_changedstate()

1181

gobject.timeout_add(timedelta_to_milliseconds

1182

(self.approval_duration),

1183

self._reset_approved)

1184

1408

1185

1409

1186

## D-Bus methods, signals & properties

1410

1411

## Interfaces

1187

_interface = "se.recompile.Mandos.Client"

1412

1188

1413

1189

## Signals

1414

1190

1425

1201

pass

1426

1202

1427

1203

# PropertyChanged - signal

1428

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

1429

1204

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

1430

1205

def PropertyChanged(self, property, value):

1431

1206

"D-Bus signal"

1495

1270

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

1496

1271

1497

1272

# ApprovedByDefault - property

1498

@dbus_service_property(_interface,

1499

signature="b",

1273

@dbus_service_property(_interface, signature="b",

1500

1274

access="readwrite")

1501

1275

def ApprovedByDefault_dbus_property(self, value=None):

1502

1276

if value is None: # get

1504

1278

self.approved_by_default = bool(value)

1505

1279

1506

1280

# ApprovalDelay - property

1507

@dbus_service_property(_interface,

1508

signature="t",

1281

@dbus_service_property(_interface, signature="t",

1509

1282

access="readwrite")

1510

1283

def ApprovalDelay_dbus_property(self, value=None):

1511

1284

if value is None: # get

1512

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

1513

* 1000)

1285

return dbus.UInt64(self.approval_delay_milliseconds())

1514

1286

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

1515

1287

1516

1288

# ApprovalDuration - property

1517

@dbus_service_property(_interface,

1518

signature="t",

1289

@dbus_service_property(_interface, signature="t",

1519

1290

access="readwrite")

1520

1291

def ApprovalDuration_dbus_property(self, value=None):

1521

1292

if value is None: # get

1522

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

1523

* 1000)

1293

return dbus.UInt64(timedelta_to_milliseconds(

1294

self.approval_duration))

1524

1295

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

1525

1296

1526

1297

# Name - property

1534

1305

return dbus.String(self.fingerprint)

1535

1306

1536

1307

# Host - property

1537

@dbus_service_property(_interface,

1538

signature="s",

1308

@dbus_service_property(_interface, signature="s",

1539

1309

access="readwrite")

1540

1310

def Host_dbus_property(self, value=None):

1541

1311

if value is None: # get

1542

1312

return dbus.String(self.host)

1543

self.host = str(value)

1313

self.host = unicode(value)

1544

1314

1545

1315

# Created - property

1546

1316

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

1553

1323

return datetime_to_dbus(self.last_enabled)

1554

1324

1555

1325

# Enabled - property

1556

@dbus_service_property(_interface,

1557

signature="b",

1326

@dbus_service_property(_interface, signature="b",

1558

1327

access="readwrite")

1559

1328

def Enabled_dbus_property(self, value=None):

1560

1329

if value is None: # get

1565

1334

self.disable()

1566

1335

1567

1336

# LastCheckedOK - property

1568

@dbus_service_property(_interface,

1569

signature="s",

1337

@dbus_service_property(_interface, signature="s",

1570

1338

access="readwrite")

1571

1339

def LastCheckedOK_dbus_property(self, value=None):

1572

1340

if value is not None:

1575

1343

return datetime_to_dbus(self.last_checked_ok)

1576

1344

1577

1345

# LastCheckerStatus - property

1578

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

1346

@dbus_service_property(_interface, signature="n",

1347

access="read")

1579

1348

def LastCheckerStatus_dbus_property(self):

1580

1349

return dbus.Int16(self.last_checker_status)

1581

1350

1590

1359

return datetime_to_dbus(self.last_approval_request)

1591

1360

1592

1361

# Timeout - property

1593

@dbus_service_property(_interface,

1594

signature="t",

1362

@dbus_service_property(_interface, signature="t",

1595

1363

access="readwrite")

1596

1364

def Timeout_dbus_property(self, value=None):

1597

1365

if value is None: # get

1598

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

1599

old_timeout = self.timeout

1366

return dbus.UInt64(self.timeout_milliseconds())

1600

1367

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

1601

# Reschedule disabling

1368

# Reschedule timeout

1602

1369

if self.enabled:

1603

1370

now = datetime.datetime.utcnow()

1604

self.expires += self.timeout - old_timeout

1605

if self.expires <= now:

1371

time_to_die = timedelta_to_milliseconds(

1372

(self.last_checked_ok + self.timeout) - now)

1373

if time_to_die <= 0:

1606

1374

# The timeout has passed

1607

1375

self.disable()

1608

1376

else:

1377

self.expires = (now +

1378

datetime.timedelta(milliseconds =

1379

time_to_die))

1609

1380

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

1610

1381

is None):

1611

1382

return

1612

1383

gobject.source_remove(self.disable_initiator_tag)

1613

self.disable_initiator_tag = gobject.timeout_add(

1614

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

1615

self.disable)

1384

self.disable_initiator_tag = (gobject.timeout_add

1385

(time_to_die,

1386

self.disable))

1616

1387

1617

1388

# ExtendedTimeout - property

1618

@dbus_service_property(_interface,

1619

signature="t",

1389

@dbus_service_property(_interface, signature="t",

1620

1390

access="readwrite")

1621

1391

def ExtendedTimeout_dbus_property(self, value=None):

1622

1392

if value is None: # get

1623

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

1624

* 1000)

1393

return dbus.UInt64(self.extended_timeout_milliseconds())

1625

1394

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

1626

1395

1627

1396

# Interval - property

1628

@dbus_service_property(_interface,

1629

signature="t",

1397

@dbus_service_property(_interface, signature="t",

1630

1398

access="readwrite")

1631

1399

def Interval_dbus_property(self, value=None):

1632

1400

if value is None: # get

1633

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

1401

return dbus.UInt64(self.interval_milliseconds())

1634

1402

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

1635

1403

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

1636

1404

return

1637

1405

if self.enabled:

1638

1406

# Reschedule checker run

1639

1407

gobject.source_remove(self.checker_initiator_tag)

1640

self.checker_initiator_tag = gobject.timeout_add(

1641

value, self.start_checker)

1642

self.start_checker() # Start one now, too

1408

self.checker_initiator_tag = (gobject.timeout_add

1409

(value, self.start_checker))

1410

self.start_checker() # Start one now, too

1643

1411

1644

1412

# Checker - property

1645

@dbus_service_property(_interface,

1646

signature="s",

1413

@dbus_service_property(_interface, signature="s",

1647

1414

access="readwrite")

1648

1415

def Checker_dbus_property(self, value=None):

1649

1416

if value is None: # get

1650

1417

return dbus.String(self.checker_command)

1651

self.checker_command = str(value)

1418

self.checker_command = unicode(value)

1652

1419

1653

1420

# CheckerRunning - property

1654

@dbus_service_property(_interface,

1655

signature="b",

1421

@dbus_service_property(_interface, signature="b",

1656

1422

access="readwrite")

1657

1423

def CheckerRunning_dbus_property(self, value=None):

1658

1424

if value is None: # get

1668

1434

return self.dbus_object_path # is already a dbus.ObjectPath

1669

1435

1670

1436

# Secret = property

1671

@dbus_service_property(_interface,

1672

signature="ay",

1673

access="write",

1674

byte_arrays=True)

1437

@dbus_service_property(_interface, signature="ay",

1438

access="write", byte_arrays=True)

1675

1439

def Secret_dbus_property(self, value):

1676

self.secret = bytes(value)

1440

self.secret = str(value)

1677

1441

1678

1442

del _interface

1679

1443

1683

1447

self._pipe = child_pipe

1684

1448

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

1685

1449

if not self._pipe.recv():

1686

raise KeyError(fpr)

1450

raise KeyError()

1687

1451

1688

1452

def __getattribute__(self, name):

1689

1453

if name == '_pipe':

1693

1457

if data[0] == 'data':

1694

1458

return data[1]

1695

1459

if data[0] == 'function':

1696

1697

1460

def func(*args, **kwargs):

1698

1461

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

1699

1462

return self._pipe.recv()[1]

1700

1701

1463

return func

1702

1464

1703

1465

def __setattr__(self, name, value):

1706

1468

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

1707

1469

1708

1470

1471

class ClientDBusTransitional(ClientDBus):

1472

__metaclass__ = AlternateDBusNamesMetaclass

1473

1474

1709

1475

class ClientHandler(socketserver.BaseRequestHandler, object):

1710

1476

"""A class to handle client connections.

1711

1477

1715

1481

def handle(self):

1716

1482

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

1717

1483

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

1718

str(self.client_address))

1484

unicode(self.client_address))

1719

1485

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

1720

1486

self.server.child_pipe.fileno())

1721

1487

1722

session = gnutls.connection.ClientSession(

1723

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

1488

session = (gnutls.connection

1489

.ClientSession(self.request,

1490

gnutls.connection

1491

.X509Credentials()))

1724

1492

1725

1493

# Note: gnutls.connection.X509Credentials is really a

1726

1494

# generic GnuTLS certificate credentials object so long as

1735

1503

priority = self.server.gnutls_priority

1736

1504

if priority is None:

1737

1505

priority = "NORMAL"

1738

gnutls.library.functions.gnutls_priority_set_direct(

1739

session._c_object, priority, None)

1506

(gnutls.library.functions

1507

.gnutls_priority_set_direct(session._c_object,

1508

priority, None))

1740

1509

1741

1510

# Start communication using the Mandos protocol

1742

1511

# Get protocol number

1744

1513

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

1745

1514

try:

1746

1515

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

1747

raise RuntimeError(line)

1516

raise RuntimeError

1748

1517

except (ValueError, IndexError, RuntimeError) as error:

1749

1518

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

1750

1519

return

1762

1531

approval_required = False

1763

1532

try:

1764

1533

try:

1765

fpr = self.fingerprint(

1766

self.peer_certificate(session))

1534

fpr = self.fingerprint(self.peer_certificate

1535

(session))

1767

1536

except (TypeError,

1768

1537

gnutls.errors.GNUTLSError) as error:

1769

1538

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

1784

1553

while True:

1785

1554

if not client.enabled:

1786

1555

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

1787

client.name)

1556

client.name)

1788

1557

if self.server.use_dbus:

1789

1558

# Emit D-Bus signal

1790

1559

client.Rejected("Disabled")

1799

1568

if self.server.use_dbus:

1800

1569

# Emit D-Bus signal

1801

1570

client.NeedApproval(

1802

client.approval_delay.total_seconds()

1803

* 1000, client.approved_by_default)

1571

client.approval_delay_milliseconds(),

1572

client.approved_by_default)

1804

1573

else:

1805

1574

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

1806

1575

client.name)

1812

1581

#wait until timeout or approved

1813

1582

time = datetime.datetime.now()

1814

1583

client.changedstate.acquire()

1815

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

1584

(client.changedstate.wait

1585

(float(client.timedelta_to_milliseconds(delay)

1586

/ 1000)))

1816

1587

client.changedstate.release()

1817

1588

time2 = datetime.datetime.now()

1818

1589

if (time2 - time) >= delay:

1834

1605

try:

1835

1606

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

1836

1607

except gnutls.errors.GNUTLSError as error:

1837

logger.warning("gnutls send failed",

1838

exc_info=error)

1608

logger.warning("gnutls send failed")

1839

1609

return

1840

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

1841

len(client.secret) - (sent_size

1842

+ sent))

1610

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

1611

sent, len(client.secret)

1612

- (sent_size + sent))

1843

1613

sent_size += sent

1844

1614

1845

1615

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

1855

1625

try:

1856

1626

session.bye()

1857

1627

except gnutls.errors.GNUTLSError as error:

1858

logger.warning("GnuTLS bye failed",

1859

exc_info=error)

1628

logger.warning("GnuTLS bye failed")

1860

1629

1861

1630

@staticmethod

1862

1631

def peer_certificate(session):

1863

1632

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

1864

1633

# If not an OpenPGP certificate...

1865

if (gnutls.library.functions.gnutls_certificate_type_get(

1866

session._c_object)

1634

if (gnutls.library.functions

1635

.gnutls_certificate_type_get(session._c_object)

1867

1636

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1868

1637

# ...do the normal thing

1869

1638

return session.peer_certificate

1883

1652

def fingerprint(openpgp):

1884

1653

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1885

1654

# New GnuTLS "datum" with the OpenPGP public key

1886

datum = gnutls.library.types.gnutls_datum_t(

1887

ctypes.cast(ctypes.c_char_p(openpgp),

1888

ctypes.POINTER(ctypes.c_ubyte)),

1889

ctypes.c_uint(len(openpgp)))

1655

datum = (gnutls.library.types

1656

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

1657

ctypes.POINTER

1658

(ctypes.c_ubyte)),

1659

ctypes.c_uint(len(openpgp))))

1890

1660

# New empty GnuTLS certificate

1891

1661

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1892

gnutls.library.functions.gnutls_openpgp_crt_init(

1893

ctypes.byref(crt))

1662

(gnutls.library.functions

1663

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1894

1664

# Import the OpenPGP public key into the certificate

1895

gnutls.library.functions.gnutls_openpgp_crt_import(

1896

crt, ctypes.byref(datum),

1897

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1665

(gnutls.library.functions

1666

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

1667

gnutls.library.constants

1668

.GNUTLS_OPENPGP_FMT_RAW))

1898

1669

# Verify the self signature in the key

1899

1670

crtverify = ctypes.c_uint()

1900

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1901

crt, 0, ctypes.byref(crtverify))

1671

(gnutls.library.functions

1672

.gnutls_openpgp_crt_verify_self(crt, 0,

1673

ctypes.byref(crtverify)))

1902

1674

if crtverify.value != 0:

1903

1675

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1904

raise gnutls.errors.CertificateSecurityError(

1905

"Verify failed")

1676

raise (gnutls.errors.CertificateSecurityError

1677

("Verify failed"))

1906

1678

# New buffer for the fingerprint

1907

1679

buf = ctypes.create_string_buffer(20)

1908

1680

buf_len = ctypes.c_size_t()

1909

1681

# Get the fingerprint from the certificate into the buffer

1910

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1911

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

1682

(gnutls.library.functions

1683

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

1684

ctypes.byref(buf_len)))

1912

1685

# Deinit the certificate

1913

1686

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1914

1687

# Convert the buffer to a Python bytestring

1920

1693

1921

1694

class MultiprocessingMixIn(object):

1922

1695

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

1923

1924

1696

def sub_process_main(self, request, address):

1925

1697

try:

1926

1698

self.finish_request(request, address)

1931

1703

def process_request(self, request, address):

1932

1704

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

1933

1705

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

1934

args = (request, address))

1706

args = (request,

1707

address))

1935

1708

proc.start()

1936

1709

return proc

1937

1710

1938

1711

1939

1712

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1940

1713

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

1941

1942

1714

def process_request(self, request, client_address):

1943

1715

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

1944

1716

1953

1725

1954

1726

def add_pipe(self, parent_pipe, proc):

1955

1727

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

1956

raise NotImplementedError()

1728

raise NotImplementedError

1957

1729

1958

1730

1959

1731

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1965

1737

interface: None or a network interface name (string)

1966

1738

use_ipv6: Boolean; to use IPv6 or not

1967

1739

"""

1968

1969

1740

def __init__(self, server_address, RequestHandlerClass,

1970

interface=None,

1971

use_ipv6=True,

1972

socketfd=None):

1973

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

1974

creating a new one with socket.socket().

1975

"""

1741

interface=None, use_ipv6=True):

1976

1742

self.interface = interface

1977

1743

if use_ipv6:

1978

1744

self.address_family = socket.AF_INET6

1979

if socketfd is not None:

1980

# Save the file descriptor

1981

self.socketfd = socketfd

1982

# Save the original socket.socket() function

1983

self.socket_socket = socket.socket

1984

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

1985

#

1986

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

1987

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

1988

# patching socket.socket.)

1989

#

1990

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

1991

@functools.wraps(socket.socket)

1992

def socket_wrapper(*args, **kwargs):

1993

# Restore original function so subsequent calls are

1994

# not affected.

1995

socket.socket = self.socket_socket

1996

del self.socket_socket

1997

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

1998

# saved file descriptor.

1999

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

2000

# Replace socket.socket() function with wrapper

2001

socket.socket = socket_wrapper

2002

# The socketserver.TCPServer.__init__ will call

2003

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

2004

# socket_wrapper(), if socketfd was set.

2005

1745

socketserver.TCPServer.__init__(self, server_address,

2006

1746

RequestHandlerClass)

2007

2008

1747

def server_bind(self):

2009

1748

"""This overrides the normal server_bind() function

2010

1749

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

2016

1755

self.interface)

2017

1756

else:

2018

1757

try:

2019

self.socket.setsockopt(

2020

socket.SOL_SOCKET, SO_BINDTODEVICE,

2021

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

1758

self.socket.setsockopt(socket.SOL_SOCKET,

1759

SO_BINDTODEVICE,

1760

str(self.interface

1761

+ '\0'))

2022

1762

except socket.error as error:

2023

if error.errno == errno.EPERM:

2024

logger.error("No permission to bind to"

2025

" interface %s", self.interface)

2026

elif error.errno == errno.ENOPROTOOPT:

1763

if error[0] == errno.EPERM:

1764

logger.error("No permission to"

1765

" bind to interface %s",

1766

self.interface)

1767

elif error[0] == errno.ENOPROTOOPT:

2027

1768

logger.error("SO_BINDTODEVICE not available;"

2028

1769

" cannot bind to interface %s",

2029

1770

self.interface)

2030

elif error.errno == errno.ENODEV:

2031

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

2032

" cannot bind", self.interface)

2033

1771

else:

2034

1772

raise

2035

1773

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

2038

1776

if self.address_family == socket.AF_INET6:

2039

1777

any_address = "::" # in6addr_any

2040

1778

else:

2041

any_address = "0.0.0.0" # INADDR_ANY

1779

any_address = socket.INADDR_ANY

2042

1780

self.server_address = (any_address,

2043

1781

self.server_address[1])

2044

1782

elif not self.server_address[1]:

2045

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

1783

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

1784

0)

2046

1785

# if self.interface:

2047

1786

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

2048

1787

# 0, # port

2062

1801

2063

1802

Assumes a gobject.MainLoop event loop.

2064

1803

"""

2065

2066

1804

def __init__(self, server_address, RequestHandlerClass,

2067

interface=None,

2068

use_ipv6=True,

2069

clients=None,

2070

gnutls_priority=None,

2071

use_dbus=True,

2072

socketfd=None):

1805

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

1806

gnutls_priority=None, use_dbus=True):

2073

1807

self.enabled = False

2074

1808

self.clients = clients

2075

1809

if self.clients is None:

2079

1813

IPv6_TCPServer.__init__(self, server_address,

2080

1814

RequestHandlerClass,

2081

1815

interface = interface,

2082

use_ipv6 = use_ipv6,

2083

socketfd = socketfd)

2084

1816

use_ipv6 = use_ipv6)

2085

1817

def server_activate(self):

2086

1818

if self.enabled:

2087

1819

return socketserver.TCPServer.server_activate(self)

2091

1823

2092

1824

def add_pipe(self, parent_pipe, proc):

2093

1825

# Call "handle_ipc" for both data and EOF events

2094

gobject.io_add_watch(

2095

parent_pipe.fileno(),

2096

gobject.IO_IN | gobject.IO_HUP,

2097

functools.partial(self.handle_ipc,

2098

parent_pipe = parent_pipe,

2099

proc = proc))

1826

gobject.io_add_watch(parent_pipe.fileno(),

1827

gobject.IO_IN | gobject.IO_HUP,

1828

functools.partial(self.handle_ipc,

1829

parent_pipe =

1830

parent_pipe,

1831

proc = proc))

2100

1832

2101

def handle_ipc(self, source, condition,

2102

parent_pipe=None,

2103

proc = None,

2104

client_object=None):

1833

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

1834

proc = None, client_object=None):

1835

condition_names = {

1836

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

1837

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

1838

# blocking).

1839

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

1840

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

1841

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

1842

# broken, usually for pipes and

1843

# sockets).

1844

}

1845

conditions_string = ' | '.join(name

1846

for cond, name in

1847

condition_names.iteritems()

1848

if cond & condition)

2105

1849

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

2106

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

1850

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

2107

1851

# Wait for other process to exit

2108

1852

proc.join()

2109

1853

return False

2130

1874

parent_pipe.send(False)

2131

1875

return False

2132

1876

2133

gobject.io_add_watch(

2134

parent_pipe.fileno(),

2135

gobject.IO_IN | gobject.IO_HUP,

2136

functools.partial(self.handle_ipc,

2137

parent_pipe = parent_pipe,

2138

proc = proc,

2139

client_object = client))

1877

gobject.io_add_watch(parent_pipe.fileno(),

1878

gobject.IO_IN | gobject.IO_HUP,

1879

functools.partial(self.handle_ipc,

1880

parent_pipe =

1881

parent_pipe,

1882

proc = proc,

1883

client_object =

1884

client))

2140

1885

parent_pipe.send(True)

2141

1886

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

2142

1887

# same fileno

2148

1893

2149

1894

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

2150

1895

funcname)(*args,

2151

**kwargs)))

1896

**kwargs)))

2152

1897

2153

1898

if command == 'getattr':

2154

1899

attrname = request[1]

2155

if isinstance(client_object.__getattribute__(attrname),

2156

collections.Callable):

2157

parent_pipe.send(('function', ))

1900

if callable(client_object.__getattribute__(attrname)):

1901

parent_pipe.send(('function',))

2158

1902

else:

2159

parent_pipe.send((

2160

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

1903

parent_pipe.send(('data', client_object

1904

.__getattribute__(attrname)))

2161

1905

2162

1906

if command == 'setattr':

2163

1907

attrname = request[1]

2167

1911

return True

2168

1912

2169

1913

2170

def rfc3339_duration_to_delta(duration):

2171

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

2172

2173

>>> rfc3339_duration_to_delta("P7D")

2174

datetime.timedelta(7)

2175

>>> rfc3339_duration_to_delta("PT60S")

2176

datetime.timedelta(0, 60)

2177

>>> rfc3339_duration_to_delta("PT60M")

2178

datetime.timedelta(0, 3600)

2179

>>> rfc3339_duration_to_delta("PT24H")

2180

datetime.timedelta(1)

2181

>>> rfc3339_duration_to_delta("P1W")

2182

datetime.timedelta(7)

2183

>>> rfc3339_duration_to_delta("PT5M30S")

2184

datetime.timedelta(0, 330)

2185

>>> rfc3339_duration_to_delta("P1DT3M20S")

2186

datetime.timedelta(1, 200)

2187

"""

2188

2189

# Parsing an RFC 3339 duration with regular expressions is not

2190

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

2191

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

2192

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

2193

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

2194

# avoid excessive use of external libraries.

2195

2196

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

2197

Token = collections.namedtuple("Token", (

2198

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

2199

# a "group" containing digits

2200

"value", # datetime.timedelta or None

2201

"followers")) # Tokens valid after this token

2202

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

2203

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

2204

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

2205

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

2206

datetime.timedelta(seconds=1),

2207

frozenset((token_end, )))

2208

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

2209

datetime.timedelta(minutes=1),

2210

frozenset((token_second, token_end)))

2211

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

2212

datetime.timedelta(hours=1),

2213

frozenset((token_minute, token_end)))

2214

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

2215

None,

2216

frozenset((token_hour, token_minute,

2217

token_second)))

2218

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

2219

datetime.timedelta(days=1),

2220

frozenset((token_time, token_end)))

2221

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

2222

datetime.timedelta(weeks=4),

2223

frozenset((token_day, token_end)))

2224

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

2225

datetime.timedelta(weeks=52),

2226

frozenset((token_month, token_end)))

2227

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

2228

datetime.timedelta(weeks=1),

2229

frozenset((token_end, )))

2230

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

2231

frozenset((token_year, token_month,

2232

token_day, token_time,

2233

token_week)))

2234

# Define starting values

2235

value = datetime.timedelta() # Value so far

2236

found_token = None

2237

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

2238

s = duration # String left to parse

2239

# Loop until end token is found

2240

while found_token is not token_end:

2241

# Search for any currently valid tokens

2242

for token in followers:

2243

match = token.regexp.match(s)

2244

if match is not None:

2245

# Token found

2246

if token.value is not None:

2247

# Value found, parse digits

2248

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

2249

# Add to value so far

2250

value += factor * token.value

2251

# Strip token from string

2252

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

2253

# Go to found token

2254

found_token = token

2255

# Set valid next tokens

2256

followers = found_token.followers

2257

break

2258

else:

2259

# No currently valid tokens were found

2260

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

2261

.format(duration))

2262

# End token found

2263

return value

2264

2265

2266

1914

def string_to_delta(interval):

2267

1915

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

2268

1916

2279

1927

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

2280

1928

datetime.timedelta(0, 330)

2281

1929

"""

2282

2283

try:

2284

return rfc3339_duration_to_delta(interval)

2285

except ValueError:

2286

pass

2287

2288

1930

timevalue = datetime.timedelta(0)

2289

1931

for s in interval.split():

2290

1932

try:

2291

suffix = s[-1]

1933

suffix = unicode(s[-1])

2292

1934

value = int(s[:-1])

2293

1935

if suffix == "d":

2294

1936

delta = datetime.timedelta(value)

2301

1943

elif suffix == "w":

2302

1944

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

2303

1945

else:

2304

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

2305

except IndexError as e:

1946

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

1947

except (ValueError, IndexError) as e:

2306

1948

raise ValueError(*(e.args))

2307

1949

timevalue += delta

2308

1950

return timevalue

2321

1963

sys.exit()

2322

1964

if not noclose:

2323

1965

# Close all standard open file descriptors

2324

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

1966

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

2325

1967

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

2326

1968

raise OSError(errno.ENODEV,

2327

"{} not a character device"

2328

.format(os.devnull))

1969

"%s not a character device"

1970

% os.path.devnull)

2329

1971

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

2330

1972

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

2331

1973

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

2340

1982

2341

1983

parser = argparse.ArgumentParser()

2342

1984

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

2343

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

1985

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

2344

1986

help="show version number and exit")

2345

1987

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

2346

1988

help="Bind to interface IF")

2352

1994

help="Run self-test")

2353

1995

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

2354

1996

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

2355

" to terminal", default=None)

1997

" to terminal")

2356

1998

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

2357

1999

help="Debug level for stdout output")

2358

2000

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

2365

2007

" files")

2366

2008

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

2367

2009

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

2368

" system bus interface", default=None)

2010

" system bus interface")

2369

2011

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

2370

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

2371

default=None)

2012

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

2372

2013

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

2373

2014

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

2374

" state", default=None)

2375

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

2376

help="Specify a file descriptor to a network"

2377

" socket to use instead of creating one")

2015

" state")

2378

2016

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

2379

2017

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

2380

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

2381

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

2382

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

2383

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

2384

default=None)

2385

2018

2386

2019

options = parser.parse_args()

2387

2020

2388

2021

if options.check:

2389

2022

import doctest

2390

fail_count, test_count = doctest.testmod()

2391

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

2023

doctest.testmod()

2024

sys.exit()

2392

2025

2393

2026

# Default values for config file for server-global settings

2394

2027

server_defaults = { "interface": "",

2396

2029

"port": "",

2397

2030

"debug": "False",

2398

2031

"priority":

2399

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

2400

":+SIGN-DSA-SHA256",

2032

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

2401

2033

"servicename": "Mandos",

2402

2034

"use_dbus": "True",

2403

2035

"use_ipv6": "True",

2404

2036

"debuglevel": "",

2405

2037

"restore": "True",

2406

"socket": "",

2407

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

2408

"foreground": "False",

2409

"zeroconf": "True",

2410

}

2038

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

2039

}

2411

2040

2412

2041

# Parse config file for server-global settings

2413

2042

server_config = configparser.SafeConfigParser(server_defaults)

2414

2043

del server_defaults

2415

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

2044

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

2045

"mandos.conf"))

2416

2046

# Convert the SafeConfigParser object to a dict

2417

2047

server_settings = server_config.defaults()

2418

2048

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

2419

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

2049

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

2420

2050

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

2421

2051

option)

2422

2052

if server_settings["port"]:

2423

2053

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

2424

2054

"port")

2425

if server_settings["socket"]:

2426

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

2427

"socket")

2428

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

2429

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

2430

# happen with a supplied network socket.

2431

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

2432

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

2433

["socket"])

2434

2055

del server_config

2435

2056

2436

2057

# Override the settings from the config file with command line

2437

2058

# options, if set.

2438

2059

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

2439

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

2440

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

2441

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

2060

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

2061

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

2062

"statedir"):

2442

2063

value = getattr(options, option)

2443

2064

if value is not None:

2444

2065

server_settings[option] = value

2445

2066

del options

2446

2067

# Force all strings to be unicode

2447

2068

for option in server_settings.keys():

2448

if isinstance(server_settings[option], bytes):

2449

server_settings[option] = (server_settings[option]

2450

.decode("utf-8"))

2451

# Force all boolean options to be boolean

2452

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

2453

"foreground", "zeroconf"):

2454

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

2455

# Debug implies foreground

2456

if server_settings["debug"]:

2457

server_settings["foreground"] = True

2069

if type(server_settings[option]) is str:

2070

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

2458

2071

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

2459

2072

2460

2073

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

2461

2074

2462

if (not server_settings["zeroconf"]

2463

and not (server_settings["port"]

2464

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

2465

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

2466

2467

2075

# For convenience

2468

2076

debug = server_settings["debug"]

2469

2077

debuglevel = server_settings["debuglevel"]

2471

2079

use_ipv6 = server_settings["use_ipv6"]

2472

2080

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

2473

2081

stored_state_file)

2474

foreground = server_settings["foreground"]

2475

zeroconf = server_settings["zeroconf"]

2476

2082

2477

2083

if debug:

2478

2084

initlogger(debug, logging.DEBUG)

2484

2090

initlogger(debug, level)

2485

2091

2486

2092

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

2487

syslogger.setFormatter(

2488

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

2489

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

2490

server_settings["servicename"])))

2093

syslogger.setFormatter(logging.Formatter

2094

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

2095

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

2096

% server_settings["servicename"]))

2491

2097

2492

2098

# Parse config file with clients

2493

2099

client_config = configparser.SafeConfigParser(Client

2498

2104

global mandos_dbus_service

2499

2105

mandos_dbus_service = None

2500

2106

2501

socketfd = None

2502

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

2503

socketfd = server_settings["socket"]

2504

tcp_server = MandosServer(

2505

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

2506

ClientHandler,

2507

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

2508

use_ipv6=use_ipv6,

2509

gnutls_priority=server_settings["priority"],

2510

use_dbus=use_dbus,

2511

socketfd=socketfd)

2512

if not foreground:

2513

pidfilename = "/run/mandos.pid"

2514

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

2515

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

2516

pidfile = None

2107

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

2108

server_settings["port"]),

2109

ClientHandler,

2110

interface=(server_settings["interface"]

2111

or None),

2112

use_ipv6=use_ipv6,

2113

gnutls_priority=

2114

server_settings["priority"],

2115

use_dbus=use_dbus)

2116

if not debug:

2117

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

2517

2118

try:

2518

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

2519

except IOError as e:

2520

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

2521

exc_info=e)

2119

pidfile = open(pidfilename, "w")

2120

except IOError:

2121

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

2522

2122

2523

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

2123

try:

2124

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

2125

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

2126

except KeyError:

2524

2127

try:

2525

uid = pwd.getpwnam(name).pw_uid

2526

gid = pwd.getpwnam(name).pw_gid

2527

break

2128

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

2129

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

2528

2130

except KeyError:

2529

continue

2530

else:

2531

uid = 65534

2532

gid = 65534

2131

try:

2132

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

2133

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

2134

except KeyError:

2135

uid = 65534

2136

gid = 65534

2533

2137

try:

2534

2138

os.setgid(gid)

2535

2139

os.setuid(uid)

2536

2140

except OSError as error:

2537

if error.errno != errno.EPERM:

2538

raise

2141

if error[0] != errno.EPERM:

2142

raise error

2539

2143

2540

2144

if debug:

2541

2145

# Enable all possible GnuTLS debugging

2548

2152

def debug_gnutls(level, string):

2549

2153

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

2550

2154

2551

gnutls.library.functions.gnutls_global_set_log_function(

2552

debug_gnutls)

2155

(gnutls.library.functions

2156

.gnutls_global_set_log_function(debug_gnutls))

2553

2157

2554

2158

# Redirect stdin so all checkers get /dev/null

2555

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

2159

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

2556

2160

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

2557

2161

if null > 2:

2558

2162

os.close(null)

2559

2163

2560

2164

# Need to fork before connecting to D-Bus

2561

if not foreground:

2165

if not debug:

2562

2166

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

2563

2167

daemon()

2564

2168

2565

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

2566

# need to inform gobject that threads will be used.

2567

2169

gobject.threads_init()

2568

2170

2569

2171

global main_loop

2570

2172

# From the Avahi example code

2571

DBusGMainLoop(set_as_default=True)

2173

DBusGMainLoop(set_as_default=True )

2572

2174

main_loop = gobject.MainLoop()

2573

2175

bus = dbus.SystemBus()

2574

2176

# End of Avahi example code

2575

2177

if use_dbus:

2576

2178

try:

2577

2179

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

2578

bus,

2579

do_not_queue=True)

2580

old_bus_name = dbus.service.BusName(

2581

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

2582

do_not_queue=True)

2583

except dbus.exceptions.DBusException as e:

2584

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

2180

bus, do_not_queue=True)

2181

old_bus_name = (dbus.service.BusName

2182

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

2183

do_not_queue=True))

2184

except dbus.exceptions.NameExistsException as e:

2185

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

2585

2186

use_dbus = False

2586

2187

server_settings["use_dbus"] = False

2587

2188

tcp_server.use_dbus = False

2588

if zeroconf:

2589

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2590

service = AvahiServiceToSyslog(

2591

name = server_settings["servicename"],

2592

servicetype = "_mandos._tcp",

2593

protocol = protocol,

2594

bus = bus)

2595

if server_settings["interface"]:

2596

service.interface = if_nametoindex(

2597

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

2189

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2190

service = AvahiServiceToSyslog(name =

2191

server_settings["servicename"],

2192

servicetype = "_mandos._tcp",

2193

protocol = protocol, bus = bus)

2194

if server_settings["interface"]:

2195

service.interface = (if_nametoindex

2196

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

2598

2197

2599

2198

global multiprocessing_manager

2600

2199

multiprocessing_manager = multiprocessing.Manager()

2601

2200

2602

2201

client_class = Client

2603

2202

if use_dbus:

2604

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

2203

client_class = functools.partial(ClientDBusTransitional,

2204

bus = bus)

2605

2205

2606

2206

client_settings = Client.config_parser(client_config)

2607

2207

old_client_settings = {}

2608

2208

clients_data = {}

2609

2209

2610

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

2611

global wnull

2612

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

2613

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

2614

# mode

2615

if debug or not foreground:

2616

wnull.close()

2617

2618

2210

# Get client data and settings from last running state.

2619

2211

if server_settings["restore"]:

2620

2212

try:

2621

2213

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

2622

clients_data, old_client_settings = pickle.load(

2623

stored_state)

2214

clients_data, old_client_settings = (pickle.load

2215

(stored_state))

2624

2216

os.remove(stored_state_path)

2625

2217

except IOError as e:

2626

if e.errno == errno.ENOENT:

2627

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

2628

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

2629

else:

2630

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

2631

exc_info=e)

2218

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

2219

.format(e))

2220

if e.errno != errno.ENOENT:

2632

2221

raise

2633

2222

except EOFError as e:

2634

2223

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

2635

"EOFError:",

2636

exc_info=e)

2224

"EOFError: {0}".format(e))

2637

2225

2638

2226

with PGPEngine() as pgp:

2639

for client_name, client in clients_data.items():

2640

# Skip removed clients

2641

if client_name not in client_settings:

2642

continue

2643

2227

for client_name, client in clients_data.iteritems():

2644

2228

# Decide which value to use after restoring saved state.

2645

2229

# We have three different values: Old config file,

2646

2230

# new config file, and saved state.

2651

2235

# For each value in new config, check if it

2652

2236

# differs from the old config value (Except for

2653

2237

# the "secret" attribute)

2654

if (name != "secret"

2655

and (value !=

2656

old_client_settings[client_name][name])):

2238

if (name != "secret" and

2239

value != old_client_settings[client_name]

2240

[name]):

2657

2241

client[name] = value

2658

2242

except KeyError:

2659

2243

pass

2660

2244

2661

2245

# Clients who has passed its expire date can still be

2662

# enabled if its last checker was successful. A Client

2246

# enabled if its last checker was successful. Clients

2663

2247

# whose checker succeeded before we stored its state is

2664

2248

# assumed to have successfully run all checkers during

2665

2249

# downtime.

2667

2251

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

2668

2252

if not client["last_checked_ok"]:

2669

2253

logger.warning(

2670

"disabling client {} - Client never "

2671

"performed a successful checker".format(

2672

client_name))

2254

"disabling client {0} - Client never "

2255

"performed a successful checker"

2256

.format(client_name))

2673

2257

client["enabled"] = False

2674

2258

elif client["last_checker_status"] != 0:

2675

2259

logger.warning(

2676

"disabling client {} - Client last"

2677

" checker failed with error code"

2678

" {}".format(

2679

client_name,

2680

client["last_checker_status"]))

2260

"disabling client {0} - Client "

2261

"last checker failed with error code {1}"

2262

.format(client_name,

2263

client["last_checker_status"]))

2681

2264

client["enabled"] = False

2682

2265

else:

2683

client["expires"] = (

2684

datetime.datetime.utcnow()

2685

+ client["timeout"])

2266

client["expires"] = (datetime.datetime

2267

.utcnow()

2268

+ client["timeout"])

2686

2269

logger.debug("Last checker succeeded,"

2687

" keeping {} enabled".format(

2688

client_name))

2270

" keeping {0} enabled"

2271

.format(client_name))

2689

2272

try:

2690

client["secret"] = pgp.decrypt(

2691

client["encrypted_secret"],

2692

client_settings[client_name]["secret"])

2273

client["secret"] = (

2274

pgp.decrypt(client["encrypted_secret"],

2275

client_settings[client_name]

2276

["secret"]))

2693

2277

except PGPError:

2694

2278

# If decryption fails, we use secret from new settings

2695

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

2696

client_name))

2697

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

2698

["secret"])

2279

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

2280

.format(client_name))

2281

client["secret"] = (

2282

client_settings[client_name]["secret"])

2283

2699

2284

2700

2285

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

2701

2286

for client_name in (set(old_client_settings)

2704

2289

for client_name in (set(client_settings)

2705

2290

- set(old_client_settings)):

2706

2291

clients_data[client_name] = client_settings[client_name]

2707

2292

2708

2293

# Create all client objects

2709

for client_name, client in clients_data.items():

2294

for client_name, client in clients_data.iteritems():

2710

2295

tcp_server.clients[client_name] = client_class(

2711

name = client_name,

2712

settings = client,

2713

server_settings = server_settings)

2296

name = client_name, settings = client)

2714

2297

2715

2298

if not tcp_server.clients:

2716

2299

logger.warning("No clients defined")

2717

2718

if not foreground:

2719

if pidfile is not None:

2720

pid = os.getpid()

2721

try:

2722

with pidfile:

2723

print(pid, file=pidfile)

2724

except IOError:

2725

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

2726

pidfilename, pid)

2727

del pidfile

2300

2301

if not debug:

2302

try:

2303

with pidfile:

2304

pid = os.getpid()

2305

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

2306

del pidfile

2307

except IOError:

2308

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

2309

pidfilename, pid)

2310

except NameError:

2311

# "pidfile" was never created

2312

pass

2728

2313

del pidfilename

2314

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

2729

2315

2730

2316

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

2731

2317

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

2732

2318

2733

2319

if use_dbus:

2734

2735

@alternate_dbus_interfaces(

2736

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

2737

class MandosDBusService(DBusObjectWithProperties):

2320

class MandosDBusService(dbus.service.Object):

2738

2321

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

2739

2740

2322

def __init__(self):

2741

2323

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

2742

2743

2324

_interface = "se.recompile.Mandos"

2744

2325

2745

@dbus_interface_annotations(_interface)

2746

def _foo(self):

2747

return {

2748

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

2749

"false" }

2750

2751

2326

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

2752

2327

def ClientAdded(self, objpath):

2753

2328

"D-Bus signal"

2766

2341

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

2767

2342

def GetAllClients(self):

2768

2343

"D-Bus method"

2769

return dbus.Array(c.dbus_object_path for c in

2344

return dbus.Array(c.dbus_object_path

2345

for c in

2770

2346

tcp_server.clients.itervalues())

2771

2347

2772

2348

@dbus.service.method(_interface,

2774

2350

def GetAllClientsWithProperties(self):

2775

2351

"D-Bus method"

2776

2352

return dbus.Dictionary(

2777

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

2778

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

2353

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

2354

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

2779

2355

signature="oa{sv}")

2780

2356

2781

2357

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

2794

2370

2795

2371

del _interface

2796

2372

2797

mandos_dbus_service = MandosDBusService()

2373

class MandosDBusServiceTransitional(MandosDBusService):

2374

__metaclass__ = AlternateDBusNamesMetaclass

2375

mandos_dbus_service = MandosDBusServiceTransitional()

2798

2376

2799

2377

def cleanup():

2800

2378

"Cleanup function; run on exit"

2801

if zeroconf:

2802

service.cleanup()

2379

service.cleanup()

2803

2380

2804

2381

multiprocessing.active_children()

2805

wnull.close()

2806

2382

if not (tcp_server.clients or client_settings):

2807

2383

return

2808

2384

2819

2395

2820

2396

# A list of attributes that can not be pickled

2821

2397

# + secret.

2822

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

2823

"checker", "server_settings" }

2824

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

2825

.Object):

2398

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

2399

"checker"))

2400

for name, typ in (inspect.getmembers

2401

(dbus.service.Object)):

2826

2402

exclude.add(name)

2827

2403

2828

2404

client_dict["encrypted_secret"] = (client

2835

2411

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

2836

2412

2837

2413

try:

2838

with tempfile.NamedTemporaryFile(

2839

mode='wb',

2840

suffix=".pickle",

2841

prefix='clients-',

2842

dir=os.path.dirname(stored_state_path),

2843

delete=False) as stored_state:

2414

tempfd, tempname = tempfile.mkstemp(suffix=".pickle",

2415

prefix="clients-",

2416

dir=os.path.dirname

2417

(stored_state_path))

2418

with os.fdopen(tempfd, "wb") as stored_state:

2844

2419

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

2845

tempname = stored_state.name

2846

2420

os.rename(tempname, stored_state_path)

2847

2421

except (IOError, OSError) as e:

2422

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

2423

.format(e))

2848

2424

if not debug:

2849

2425

try:

2850

2426

os.remove(tempname)

2851

2427

except NameError:

2852

2428

pass

2853

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

2854

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

2855

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

2856

else:

2857

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

2858

exc_info=e)

2859

raise

2429

if e.errno not in set((errno.ENOENT, errno.EACCES,

2430

errno.EEXIST)):

2431

raise e

2860

2432

2861

2433

# Delete all clients, and settings from config

2862

2434

while tcp_server.clients:

2867

2439

client.disable(quiet=True)

2868

2440

if use_dbus:

2869

2441

# Emit D-Bus signal

2870

mandos_dbus_service.ClientRemoved(

2871

client.dbus_object_path, client.name)

2442

mandos_dbus_service.ClientRemoved(client

2443

.dbus_object_path,

2444

client.name)

2872

2445

client_settings.clear()

2873

2446

2874

2447

atexit.register(cleanup)

2885

2458

tcp_server.server_activate()

2886

2459

2887

2460

# Find out what port we got

2888

if zeroconf:

2889

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

2461

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

2890

2462

if use_ipv6:

2891

2463

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

2892

" flowinfo %d, scope_id %d",

2893

*tcp_server.socket.getsockname())

2464

" flowinfo %d, scope_id %d"

2465

% tcp_server.socket.getsockname())

2894

2466

else: # IPv4

2895

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

2896

*tcp_server.socket.getsockname())

2467

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

2468

% tcp_server.socket.getsockname())

2897

2469

2898

2470

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

2899

2471

2900

2472

try:

2901

if zeroconf:

2902

# From the Avahi example code

2903

try:

2904

service.activate()

2905

except dbus.exceptions.DBusException as error:

2906

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

2907

cleanup()

2908

sys.exit(1)

2909

# End of Avahi example code

2473

# From the Avahi example code

2474

try:

2475

service.activate()

2476

except dbus.exceptions.DBusException as error:

2477

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

2478

cleanup()

2479

sys.exit(1)

2480

# End of Avahi example code

2910

2481

2911

2482

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

2912

2483

lambda *args, **kwargs:

2916

2487

logger.debug("Starting main loop")

2917

2488

main_loop.run()

2918

2489

except AvahiError as error:

2919

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

2490

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

2920

2491

cleanup()

2921

2492

sys.exit(1)

2922

2493

except KeyboardInterrupt:

2927

2498

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

2928

2499

cleanup()

2929

2500

2930

2931

2501

if __name__ == '__main__':

2932

2502

main()