/mandos/trunk : revision 237.4.65

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

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#

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# Everything else is

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#

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

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

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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import SocketServer as socketserver

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from future_builtins import *

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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try:

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import gobject

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except ImportError:

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from gi.repository import GObject as gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.4.1"

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version = "1.7.3"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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

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

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return interface_index

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def initlogger(level=logging.WARNING):

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet'])

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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

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

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self._cleanup()

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return False

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def password_encode(self, password):

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

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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

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with open(os.devnull) as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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

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with open(os.devnull) as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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class AvahiError(Exception):

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

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self.value = value

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

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def __unicode__(self):

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return unicode(repr(self.value))

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

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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def rename(self, remove=True):

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

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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

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self.name)

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self.remove()

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if remove:

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

321

if (error.get_dbus_name()

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

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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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def remove(self):

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

284

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if self.entry_group_state_changed_match is not None:

286

334

self.entry_group_state_changed_match = None

287

335

if self.group is not None:

288

336

self.group.Reset()

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def add(self):

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

291

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self.remove()

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357

dbus.UInt16(self.port),

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358

avahi.string_array_to_txt_array(self.TXT))

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359

self.group.Commit()

360

311

361

def entry_group_state_changed(self, state, error):

312

362

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

313

363

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

319

369

self.rename()

320

370

elif state == avahi.ENTRY_GROUP_FAILURE:

321

371

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

322

unicode(error))

323

raise AvahiGroupError("State changed: %s"

324

% unicode(error))

372

str(error))

373

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

374

325

375

def cleanup(self):

326

376

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

327

377

if self.group is not None:

332

382

pass

333

383

self.group = None

334

384

self.remove()

385

335

386

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

336

387

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

337

388

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

338

bad_states = { avahi.SERVER_INVALID:

339

"Zeroconf server invalid",

340

avahi.SERVER_REGISTERING: None,

341

avahi.SERVER_COLLISION:

342

"Zeroconf server name collision",

343

avahi.SERVER_FAILURE:

344

"Zeroconf server failure" }

389

bad_states = {

390

avahi.SERVER_INVALID: "Zeroconf server invalid",

391

avahi.SERVER_REGISTERING: None,

392

avahi.SERVER_COLLISION: "Zeroconf server name collision",

393

avahi.SERVER_FAILURE: "Zeroconf server failure",

394

}

345

395

if state in bad_states:

346

396

if bad_states[state] is not None:

347

397

if error is None:

350

400

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

351

401

self.cleanup()

352

402

elif state == avahi.SERVER_RUNNING:

353

self.add()

403

try:

404

self.add()

405

except dbus.exceptions.DBusException as error:

406

if (error.get_dbus_name()

407

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

408

logger.info("Local Zeroconf service name"

409

" collision.")

410

return self.rename(remove=False)

411

else:

412

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

413

self.cleanup()

414

os._exit(1)

354

415

else:

355

416

if error is None:

356

417

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

357

418

else:

358

419

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

420

359

421

def activate(self):

360

422

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

361

423

if self.server is None:

365

427

follow_name_owner_changes=True),

366

428

avahi.DBUS_INTERFACE_SERVER)

367

429

self.server.connect_to_signal("StateChanged",

368

self.server_state_changed)

430

self.server_state_changed)

369

431

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

370

432

433

371

434

class AvahiServiceToSyslog(AvahiService):

372

def rename(self):

435

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

373

436

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

374

ret = AvahiService.rename(self)

375

syslogger.setFormatter(logging.Formatter

376

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

377

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

378

% self.name))

437

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

438

syslogger.setFormatter(logging.Formatter(

439

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

440

.format(self.name)))

379

441

return ret

380

442

381

def _timedelta_to_milliseconds(td):

382

"Convert a datetime.timedelta() to milliseconds"

383

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

384

+ (td.seconds * 1000)

385

+ (td.microseconds // 1000))

386

443

# Pretend that we have a GnuTLS module

444

class GnuTLS(object):

445

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

446

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

447

448

_library = ctypes.cdll.LoadLibrary(

449

ctypes.util.find_library("gnutls"))

450

_need_version = "3.3.0"

451

def __init__(self):

452

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

453

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

454

# happens.

455

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

456

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

457

.format(self._need_version))

458

459

# Unless otherwise indicated, the constants and types below are

460

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

461

462

# Constants

463

E_SUCCESS = 0

464

E_INTERRUPTED = -52

465

E_AGAIN = -28

466

CRT_OPENPGP = 2

467

CLIENT = 2

468

SHUT_RDWR = 0

469

CRD_CERTIFICATE = 1

470

E_NO_CERTIFICATE_FOUND = -49

471

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

472

473

# Types

474

class session_int(ctypes.Structure):

475

_fields_ = []

476

session_t = ctypes.POINTER(session_int)

477

class certificate_credentials_st(ctypes.Structure):

478

_fields_ = []

479

certificate_credentials_t = ctypes.POINTER(

480

certificate_credentials_st)

481

certificate_type_t = ctypes.c_int

482

class datum_t(ctypes.Structure):

483

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

484

('size', ctypes.c_uint)]

485

class openpgp_crt_int(ctypes.Structure):

486

_fields_ = []

487

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

488

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

489

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

490

credentials_type_t = ctypes.c_int #

491

transport_ptr_t = ctypes.c_void_p

492

close_request_t = ctypes.c_int

493

494

# Exceptions

495

class Error(Exception):

496

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

497

# exception might be raised from within GnuTLS.__init__,

498

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

499

# global variable has happened.

500

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

501

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

502

# code is passed, convert it to a string with

503

# gnutls.strerror()

504

self.code = code

505

if message is None and code is not None:

506

message = GnuTLS.strerror(code)

507

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

508

message, *args)

509

510

class CertificateSecurityError(Error):

511

pass

512

513

# Classes

514

class Credentials(object):

515

def __init__(self):

516

self._c_object = gnutls.certificate_credentials_t()

517

gnutls.certificate_allocate_credentials(

518

ctypes.byref(self._c_object))

519

self.type = gnutls.CRD_CERTIFICATE

520

521

def __del__(self):

522

gnutls.certificate_free_credentials(self._c_object)

523

524

class ClientSession(object):

525

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

526

self._c_object = gnutls.session_t()

527

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

528

gnutls.set_default_priority(self._c_object)

529

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

530

gnutls.handshake_set_private_extensions(self._c_object,

531

True)

532

self.socket = socket

533

if credentials is None:

534

credentials = gnutls.Credentials()

535

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

536

ctypes.cast(credentials._c_object,

537

ctypes.c_void_p))

538

self.credentials = credentials

539

540

def __del__(self):

541

gnutls.deinit(self._c_object)

542

543

def handshake(self):

544

return gnutls.handshake(self._c_object)

545

546

def send(self, data):

547

data = bytes(data)

548

data_len = len(data)

549

while data_len > 0:

550

data_len -= gnutls.record_send(self._c_object,

551

data[-data_len:],

552

data_len)

553

554

def bye(self):

555

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

556

557

# Error handling functions

558

def _error_code(result):

559

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

560

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

561

if result >= 0:

562

return result

563

if result == gnutls.E_NO_CERTIFICATE_FOUND:

564

raise gnutls.CertificateSecurityError(code = result)

565

raise gnutls.Error(code = result)

566

567

def _retry_on_error(result, func, arguments):

568

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

569

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

570

while result < 0:

571

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

572

return _error_code(result)

573

result = func(*arguments)

574

return result

575

576

# Unless otherwise indicated, the function declarations below are

577

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

578

579

# Functions

580

priority_set_direct = _library.gnutls_priority_set_direct

581

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

582

ctypes.POINTER(ctypes.c_char_p)]

583

priority_set_direct.restype = _error_code

584

585

init = _library.gnutls_init

586

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

587

init.restype = _error_code

588

589

set_default_priority = _library.gnutls_set_default_priority

590

set_default_priority.argtypes = [session_t]

591

set_default_priority.restype = _error_code

592

593

record_send = _library.gnutls_record_send

594

record_send.argtypes = [session_t, ctypes.c_void_p,

595

ctypes.c_size_t]

596

record_send.restype = ctypes.c_ssize_t

597

record_send.errcheck = _retry_on_error

598

599

certificate_allocate_credentials = (

600

_library.gnutls_certificate_allocate_credentials)

601

certificate_allocate_credentials.argtypes = [

602

ctypes.POINTER(certificate_credentials_t)]

603

certificate_allocate_credentials.restype = _error_code

604

605

certificate_free_credentials = (

606

_library.gnutls_certificate_free_credentials)

607

certificate_free_credentials.argtypes = [certificate_credentials_t]

608

certificate_free_credentials.restype = None

609

610

handshake_set_private_extensions = (

611

_library.gnutls_handshake_set_private_extensions)

612

handshake_set_private_extensions.argtypes = [session_t,

613

ctypes.c_int]

614

handshake_set_private_extensions.restype = None

615

616

credentials_set = _library.gnutls_credentials_set

617

credentials_set.argtypes = [session_t, credentials_type_t,

618

ctypes.c_void_p]

619

credentials_set.restype = _error_code

620

621

strerror = _library.gnutls_strerror

622

strerror.argtypes = [ctypes.c_int]

623

strerror.restype = ctypes.c_char_p

624

625

certificate_type_get = _library.gnutls_certificate_type_get

626

certificate_type_get.argtypes = [session_t]

627

certificate_type_get.restype = _error_code

628

629

certificate_get_peers = _library.gnutls_certificate_get_peers

630

certificate_get_peers.argtypes = [session_t,

631

ctypes.POINTER(ctypes.c_uint)]

632

certificate_get_peers.restype = ctypes.POINTER(datum_t)

633

634

global_set_log_level = _library.gnutls_global_set_log_level

635

global_set_log_level.argtypes = [ctypes.c_int]

636

global_set_log_level.restype = None

637

638

global_set_log_function = _library.gnutls_global_set_log_function

639

global_set_log_function.argtypes = [log_func]

640

global_set_log_function.restype = None

641

642

deinit = _library.gnutls_deinit

643

deinit.argtypes = [session_t]

644

deinit.restype = None

645

646

handshake = _library.gnutls_handshake

647

handshake.argtypes = [session_t]

648

handshake.restype = _error_code

649

handshake.errcheck = _retry_on_error

650

651

transport_set_ptr = _library.gnutls_transport_set_ptr

652

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

653

transport_set_ptr.restype = None

654

655

bye = _library.gnutls_bye

656

bye.argtypes = [session_t, close_request_t]

657

bye.restype = _error_code

658

bye.errcheck = _retry_on_error

659

660

check_version = _library.gnutls_check_version

661

check_version.argtypes = [ctypes.c_char_p]

662

check_version.restype = ctypes.c_char_p

663

664

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

665

666

openpgp_crt_init = _library.gnutls_openpgp_crt_init

667

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

668

openpgp_crt_init.restype = _error_code

669

670

openpgp_crt_import = _library.gnutls_openpgp_crt_import

671

openpgp_crt_import.argtypes = [openpgp_crt_t,

672

ctypes.POINTER(datum_t),

673

openpgp_crt_fmt_t]

674

openpgp_crt_import.restype = _error_code

675

676

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

677

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

678

ctypes.POINTER(ctypes.c_uint)]

679

openpgp_crt_verify_self.restype = _error_code

680

681

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

682

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

683

openpgp_crt_deinit.restype = None

684

685

openpgp_crt_get_fingerprint = (

686

_library.gnutls_openpgp_crt_get_fingerprint)

687

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

688

ctypes.c_void_p,

689

ctypes.POINTER(

690

ctypes.c_size_t)]

691

openpgp_crt_get_fingerprint.restype = _error_code

692

693

# Remove non-public functions

694

del _error_code, _retry_on_error

695

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

696

gnutls = GnuTLS()

697

698

def call_pipe(connection, # : multiprocessing.Connection

699

func, *args, **kwargs):

700

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

701

702

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

703

return value on the provided multiprocessing.Connection.

704

"""

705

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

706

connection.close()

707

387

708

class Client(object):

388

709

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

389

710

390

711

Attributes:

391

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

712

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

392

713

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

393

714

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

394

715

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

412

733

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

413

734

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

414

735

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

415

416

736

last_checker_status: integer between 0 and 255 reflecting exit

417

737

status of last checker. -1 reflects crashed

418

checker, or None.

738

checker, -2 means no checker completed yet.

739

last_checker_signal: The signal which killed the last checker, if

740

last_checker_status is -1

419

741

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

420

742

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

421

743

D-Bus identifiers

422

744

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

423

745

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

424

746

until this client is disabled

425

extended_timeout: extra long timeout when password has been sent

747

extended_timeout: extra long timeout when secret has been sent

426

748

runtime_expansions: Allowed attributes for runtime expansion.

427

749

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

428

750

disabled, or None

751

server_settings: The server_settings dict from main()

429

752

"""

430

753

431

754

runtime_expansions = ("approval_delay", "approval_duration",

432

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

433

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

755

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

756

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

757

"last_approval_request", "last_checked_ok",

434

758

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

435

436

def timeout_milliseconds(self):

437

"Return the 'timeout' attribute in milliseconds"

438

return _timedelta_to_milliseconds(self.timeout)

439

440

def extended_timeout_milliseconds(self):

441

"Return the 'extended_timeout' attribute in milliseconds"

442

return _timedelta_to_milliseconds(self.extended_timeout)

443

444

def interval_milliseconds(self):

445

"Return the 'interval' attribute in milliseconds"

446

return _timedelta_to_milliseconds(self.interval)

447

448

def approval_delay_milliseconds(self):

449

return _timedelta_to_milliseconds(self.approval_delay)

450

451

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

452

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

453

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

454

attribute."""

759

client_defaults = {

760

"timeout": "PT5M",

761

"extended_timeout": "PT15M",

762

"interval": "PT2M",

763

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

764

"host": "",

765

"approval_delay": "PT0S",

766

"approval_duration": "PT1S",

767

"approved_by_default": "True",

768

"enabled": "True",

769

}

770

771

@staticmethod

772

def config_parser(config):

773

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

774

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

775

with exceptions for any special settings as defined above.

776

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

777

value given the same arguments.

778

"""

779

settings = {}

780

for client_name in config.sections():

781

section = dict(config.items(client_name))

782

client = settings[client_name] = {}

783

784

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

785

# Reformat values from string types to Python types

786

client["approved_by_default"] = config.getboolean(

787

client_name, "approved_by_default")

788

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

789

"enabled")

790

791

# Uppercase and remove spaces from fingerprint for later

792

# comparison purposes with return value from the

793

# fingerprint() function

794

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

795

.replace(" ", ""))

796

if "secret" in section:

797

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

798

elif "secfile" in section:

799

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

800

(section["secfile"])),

801

"rb") as secfile:

802

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

803

else:

804

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

805

.format(section))

806

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

807

client["extended_timeout"] = string_to_delta(

808

section["extended_timeout"])

809

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

810

client["approval_delay"] = string_to_delta(

811

section["approval_delay"])

812

client["approval_duration"] = string_to_delta(

813

section["approval_duration"])

814

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

815

client["last_approval_request"] = None

816

client["last_checked_ok"] = None

817

client["last_checker_status"] = -2

818

819

return settings

820

821

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

455

822

self.name = name

456

if config is None:

457

config = {}

823

if server_settings is None:

824

server_settings = {}

825

self.server_settings = server_settings

826

# adding all client settings

827

for setting, value in settings.items():

828

setattr(self, setting, value)

829

830

if self.enabled:

831

if not hasattr(self, "last_enabled"):

832

self.last_enabled = datetime.datetime.utcnow()

833

if not hasattr(self, "expires"):

834

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

835

+ self.timeout)

836

else:

837

self.last_enabled = None

838

self.expires = None

839

458

840

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

459

# Uppercase and remove spaces from fingerprint for later

460

# comparison purposes with return value from the fingerprint()

461

# function

462

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

463

.replace(" ", ""))

464

841

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

465

if "secret" in config:

466

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

467

elif "secfile" in config:

468

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

469

(config["secfile"])),

470

"rb") as secfile:

471

self.secret = secfile.read()

472

else:

473

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

474

% self.name)

475

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

476

self.created = datetime.datetime.utcnow()

477

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

478

self.last_approval_request = None

479

if self.enabled:

480

self.last_enabled = datetime.datetime.utcnow()

481

else:

482

self.last_enabled = None

483

self.last_checked_ok = None

484

self.last_checker_status = None

485

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

486

self.extended_timeout = string_to_delta(config

487

["extended_timeout"])

488

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

842

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

843

datetime.datetime.utcnow())

844

845

# attributes specific for this server instance

489

846

self.checker = None

490

847

self.checker_initiator_tag = None

491

848

self.disable_initiator_tag = None

492

if self.enabled:

493

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

494

else:

495

self.expires = None

496

849

self.checker_callback_tag = None

497

self.checker_command = config["checker"]

498

850

self.current_checker_command = None

499

self._approved = None

500

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

501

True)

851

self.approved = None

502

852

self.approvals_pending = 0

503

self.approval_delay = string_to_delta(

504

config["approval_delay"])

505

self.approval_duration = string_to_delta(

506

config["approval_duration"])

507

self.changedstate = (multiprocessing_manager

508

.Condition(multiprocessing_manager

509

.Lock()))

510

self.client_structure = [attr for attr in

511

self.__dict__.iterkeys()

853

self.changedstate = multiprocessing_manager.Condition(

854

multiprocessing_manager.Lock())

855

self.client_structure = [attr

856

for attr in self.__dict__.iterkeys()

512

857

if not attr.startswith("_")]

513

858

self.client_structure.append("client_structure")

514

859

515

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

516

lambda obj:

517

isinstance(obj,

518

property)):

860

for name, t in inspect.getmembers(

861

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

519

862

if not name.startswith("_"):

520

863

self.client_structure.append(name)

521

864

529

872

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

530

873

# Already enabled

531

874

return

532

self.send_changedstate()

533

875

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

534

876

self.enabled = True

535

877

self.last_enabled = datetime.datetime.utcnow()

536

878

self.init_checker()

879

self.send_changedstate()

537

880

538

881

def disable(self, quiet=True):

539

882

"""Disable this client."""

540

883

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

541

884

return False

542

885

if not quiet:

543

self.send_changedstate()

544

if not quiet:

545

886

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

546

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

887

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

547

888

gobject.source_remove(self.disable_initiator_tag)

548

889

self.disable_initiator_tag = None

549

890

self.expires = None

550

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

891

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

551

892

gobject.source_remove(self.checker_initiator_tag)

552

893

self.checker_initiator_tag = None

553

894

self.stop_checker()

554

895

self.enabled = False

896

if not quiet:

897

self.send_changedstate()

555

898

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

556

899

return False

557

900

561

904

def init_checker(self):

562

905

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

563

906

# and every interval from then on.

564

self.checker_initiator_tag = (gobject.timeout_add

565

(self.interval_milliseconds(),

566

self.start_checker))

907

if self.checker_initiator_tag is not None:

908

gobject.source_remove(self.checker_initiator_tag)

909

self.checker_initiator_tag = gobject.timeout_add(

910

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

911

self.start_checker)

567

912

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

568

self.disable_initiator_tag = (gobject.timeout_add

569

(self.timeout_milliseconds(),

570

self.disable))

913

if self.disable_initiator_tag is not None:

914

gobject.source_remove(self.disable_initiator_tag)

915

self.disable_initiator_tag = gobject.timeout_add(

916

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

571

917

# Also start a new checker *right now*.

572

918

self.start_checker()

573

919

574

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

920

def checker_callback(self, source, condition, connection,

921

command):

575

922

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

576

923

self.checker_callback_tag = None

577

924

self.checker = None

578

if os.WIFEXITED(condition):

579

self.last_checker_status = os.WEXITSTATUS(condition)

925

# Read return code from connection (see call_pipe)

926

returncode = connection.recv()

927

connection.close()

928

929

if returncode >= 0:

930

self.last_checker_status = returncode

931

self.last_checker_signal = None

580

932

if self.last_checker_status == 0:

581

933

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

582

934

vars(self))

583

935

self.checked_ok()

584

936

else:

585

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

586

vars(self))

937

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

587

938

else:

588

939

self.last_checker_status = -1

940

self.last_checker_signal = -returncode

589

941

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

590

942

vars(self))

591

592

def checked_ok(self, timeout=None):

593

"""Bump up the timeout for this client.

594

595

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

596

alive and well.

597

"""

943

return False

944

945

def checked_ok(self):

946

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

947

self.last_checked_ok = datetime.datetime.utcnow()

948

self.last_checker_status = 0

949

self.last_checker_signal = None

950

self.bump_timeout()

951

952

def bump_timeout(self, timeout=None):

953

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

598

954

if timeout is None:

599

955

timeout = self.timeout

600

self.last_checked_ok = datetime.datetime.utcnow()

601

956

if self.disable_initiator_tag is not None:

602

957

gobject.source_remove(self.disable_initiator_tag)

958

self.disable_initiator_tag = None

603

959

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

604

self.disable_initiator_tag = (gobject.timeout_add

605

(_timedelta_to_milliseconds

606

(timeout), self.disable))

960

self.disable_initiator_tag = gobject.timeout_add(

961

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

607

962

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

608

963

609

964

def need_approval(self):

615

970

If a checker already exists, leave it running and do

616

971

nothing."""

617

972

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

618

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

619

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

620

# client would inevitably timeout, since no checker would get

621

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

973

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

974

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

975

# would inevitably timeout, since no checker would get a

976

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

622

977

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

623

978

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

624

979

# should be.

625

980

626

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

627

try:

628

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

629

except (AttributeError, OSError) as error:

630

if (isinstance(error, OSError)

631

and error.errno != errno.ECHILD):

632

raise error

633

else:

634

if pid:

635

logger.warning("Checker was a zombie")

636

gobject.source_remove(self.checker_callback_tag)

637

self.checker_callback(pid, status,

638

self.current_checker_command)

981

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

982

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

983

self.checker.join()

984

self.checker = None

639

985

# Start a new checker if needed

640

986

if self.checker is None:

987

# Escape attributes for the shell

988

escaped_attrs = {

989

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

990

for attr in self.runtime_expansions }

641

991

try:

642

# In case checker_command has exactly one % operator

643

command = self.checker_command % self.host

644

except TypeError:

645

# Escape attributes for the shell

646

escaped_attrs = dict(

647

(attr,

648

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

649

errors=

650

'replace')))

651

for attr in

652

self.runtime_expansions)

653

654

try:

655

command = self.checker_command % escaped_attrs

656

except TypeError as error:

657

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

658

' %s', self.checker_command, error)

659

return True # Try again later

992

command = self.checker_command % escaped_attrs

993

except TypeError as error:

994

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

995

self.checker_command,

996

exc_info=error)

997

return True # Try again later

660

998

self.current_checker_command = command

661

try:

662

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

663

command, self.name)

664

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

665

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

666

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

667

# always replaced by /dev/null.)

668

self.checker = subprocess.Popen(command,

669

close_fds=True,

670

shell=True, cwd="/")

671

self.checker_callback_tag = (gobject.child_watch_add

672

(self.checker.pid,

673

self.checker_callback,

674

data=command))

675

# The checker may have completed before the gobject

676

# watch was added. Check for this.

677

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

678

if pid:

679

gobject.source_remove(self.checker_callback_tag)

680

self.checker_callback(pid, status, command)

681

except OSError as error:

682

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

683

error)

999

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

1000

self.name)

1001

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

1002

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

1003

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

1004

# always replaced by /dev/null.)

1005

# The exception is when not debugging but nevertheless

1006

# running in the foreground; use the previously

1007

# created wnull.

1008

popen_args = { "close_fds": True,

1009

"shell": True,

1010

"cwd": "/" }

1011

if (not self.server_settings["debug"]

1012

and self.server_settings["foreground"]):

1013

popen_args.update({"stdout": wnull,

1014

"stderr": wnull })

1015

pipe = multiprocessing.Pipe(duplex = False)

1016

self.checker = multiprocessing.Process(

1017

target = call_pipe,

1018

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

1019

kwargs = popen_args)

1020

self.checker.start()

1021

self.checker_callback_tag = gobject.io_add_watch(

1022

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

1023

self.checker_callback, pipe[0], command)

684

1024

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

685

1025

return True

686

1026

692

1032

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

693

1033

return

694

1034

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

695

try:

696

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

697

#time.sleep(0.5)

698

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

699

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

700

except OSError as error:

701

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

702

raise

1035

self.checker.terminate()

703

1036

self.checker = None

704

1037

705

1038

706

def dbus_service_property(dbus_interface, signature="v",

707

access="readwrite", byte_arrays=False):

1039

def dbus_service_property(dbus_interface,

1040

signature="v",

1041

access="readwrite",

1042

byte_arrays=False):

708

1043

"""Decorators for marking methods of a DBusObjectWithProperties to

709

1044

become properties on the D-Bus.

710

1045

719

1054

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

720

1055

if byte_arrays and signature != "ay":

721

1056

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

722

" signature %r" % signature)

1057

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

1058

723

1059

def decorator(func):

724

1060

func._dbus_is_property = True

725

1061

func._dbus_interface = dbus_interface

730

1066

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

731

1067

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

732

1068

return func

1069

1070

return decorator

1071

1072

1073

def dbus_interface_annotations(dbus_interface):

1074

"""Decorator for marking functions returning interface annotations

1075

1076

Usage:

1077

1078

@dbus_interface_annotations("org.example.Interface")

1079

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

1080

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

1081

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

1082

"false"}

1083

"""

1084

1085

def decorator(func):

1086

func._dbus_is_interface = True

1087

func._dbus_interface = dbus_interface

1088

func._dbus_name = dbus_interface

1089

return func

1090

1091

return decorator

1092

1093

1094

def dbus_annotations(annotations):

1095

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

1096

Usage:

1097

1098

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

1099

"org.freedesktop.DBus.Property."

1100

"EmitsChangedSignal": "false"})

1101

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

1102

access="r")

1103

def Property_dbus_property(self):

1104

return dbus.Boolean(False)

1105

1106

See also the DBusObjectWithAnnotations class.

1107

"""

1108

1109

def decorator(func):

1110

func._dbus_annotations = annotations

1111

return func

1112

733

1113

return decorator

734

1114

735

1115

736

1116

class DBusPropertyException(dbus.exceptions.DBusException):

737

1117

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

738

1118

"""

739

def __unicode__(self):

740

return unicode(str(self))

1119

pass

741

1120

742

1121

743

1122

class DBusPropertyAccessException(DBusPropertyException):

752

1131

pass

753

1132

754

1133

755

class DBusObjectWithProperties(dbus.service.Object):

1134

class DBusObjectWithAnnotations(dbus.service.Object):

1135

"""A D-Bus object with annotations.

1136

1137

Classes inheriting from this can use the dbus_annotations

1138

decorator to add annotations to methods or signals.

1139

"""

1140

1141

@staticmethod

1142

def _is_dbus_thing(thing):

1143

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

1144

1145

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

1146

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

1147

"""

1148

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

1149

False)

1150

1151

def _get_all_dbus_things(self, thing):

1152

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

1153

"""

1154

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

1155

athing.__get__(self))

1156

for cls in self.__class__.__mro__

1157

for name, athing in

1158

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

1159

1160

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1161

out_signature = "s",

1162

path_keyword = 'object_path',

1163

connection_keyword = 'connection')

1164

def Introspect(self, object_path, connection):

1165

"""Overloading of standard D-Bus method.

1166

1167

Inserts annotation tags on methods and signals.

1168

"""

1169

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

1170

connection)

1171

try:

1172

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

1173

1174

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

1175

# Add annotation tags

1176

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

1177

for tag in if_tag.getElementsByTagName(typ):

1178

annots = dict()

1179

for name, prop in (self.

1180

_get_all_dbus_things(typ)):

1181

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

1182

and prop._dbus_interface

1183

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

1184

annots.update(getattr(

1185

prop, "_dbus_annotations", {}))

1186

for name, value in annots.items():

1187

ann_tag = document.createElement(

1188

"annotation")

1189

ann_tag.setAttribute("name", name)

1190

ann_tag.setAttribute("value", value)

1191

tag.appendChild(ann_tag)

1192

# Add interface annotation tags

1193

for annotation, value in dict(

1194

itertools.chain.from_iterable(

1195

annotations().items()

1196

for name, annotations

1197

in self._get_all_dbus_things("interface")

1198

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

1199

)).items():

1200

ann_tag = document.createElement("annotation")

1201

ann_tag.setAttribute("name", annotation)

1202

ann_tag.setAttribute("value", value)

1203

if_tag.appendChild(ann_tag)

1204

# Fix argument name for the Introspect method itself

1205

if (if_tag.getAttribute("name")

1206

== dbus.INTROSPECTABLE_IFACE):

1207

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

1208

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

1209

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

1210

if (arg.getAttribute("direction")

1211

== "out"):

1212

arg.setAttribute("name",

1213

"xml_data")

1214

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

1215

document.unlink()

1216

except (AttributeError, xml.dom.DOMException,

1217

xml.parsers.expat.ExpatError) as error:

1218

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

1219

exc_info=error)

1220

return xmlstring

1221

1222

1223

class DBusObjectWithProperties(DBusObjectWithAnnotations):

756

1224

"""A D-Bus object with properties.

757

1225

758

1226

Classes inheriting from this can use the dbus_service_property

760

1228

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

761

1229

"""

762

1230

763

@staticmethod

764

def _is_dbus_property(obj):

765

return getattr(obj, "_dbus_is_property", False)

766

767

def _get_all_dbus_properties(self):

768

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

769

"""

770

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

771

for cls in self.__class__.__mro__

772

for name, prop in

773

inspect.getmembers(cls, self._is_dbus_property))

774

775

1231

def _get_dbus_property(self, interface_name, property_name):

776

1232

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

777

1233

property with the specified name and interface.

778

1234

"""

779

for cls in self.__class__.__mro__:

780

for name, value in (inspect.getmembers

781

(cls, self._is_dbus_property)):

1235

for cls in self.__class__.__mro__:

1236

for name, value in inspect.getmembers(

1237

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

782

1238

if (value._dbus_name == property_name

783

1239

and value._dbus_interface == interface_name):

784

1240

return value.__get__(self)

785

1241

786

1242

# No such property

787

raise DBusPropertyNotFound(self.dbus_object_path + ":"

788

+ interface_name + "."

789

+ property_name)

790

791

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

1243

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

1244

self.dbus_object_path, interface_name, property_name))

1245

1246

@classmethod

1247

def _get_all_interface_names(cls):

1248

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

1249

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

1250

"_dbus_interface", None)

1251

for x in (inspect.getmro(cls))

1252

for attr in dir(x))

1253

if name is not None)

1254

1255

@dbus.service.method(dbus.PROPERTIES_IFACE,

1256

in_signature="ss",

792

1257

out_signature="v")

793

1258

def Get(self, interface_name, property_name):

794

1259

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

812

1277

# The byte_arrays option is not supported yet on

813

1278

# signatures other than "ay".

814

1279

if prop._dbus_signature != "ay":

815

raise ValueError

816

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

817

for byte in value))

1280

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

1281

"'ay' signature {!r}"

1282

.format(prop._dbus_signature))

1283

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

1284

for byte in value))

818

1285

prop(value)

819

1286

820

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

1287

@dbus.service.method(dbus.PROPERTIES_IFACE,

1288

in_signature="s",

821

1289

out_signature="a{sv}")

822

1290

def GetAll(self, interface_name):

823

1291

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

826

1294

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

827

1295

"""

828

1296

properties = {}

829

for name, prop in self._get_all_dbus_properties():

1297

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

830

1298

if (interface_name

831

1299

and interface_name != prop._dbus_interface):

832

1300

# Interface non-empty but did not match

838

1306

if not hasattr(value, "variant_level"):

839

1307

properties[name] = value

840

1308

continue

841

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

842

value.variant_level+1)

1309

properties[name] = type(value)(

1310

value, variant_level = value.variant_level + 1)

843

1311

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

844

1312

1313

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

1314

def PropertiesChanged(self, interface_name, changed_properties,

1315

invalidated_properties):

1316

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

1317

standard.

1318

"""

1319

pass

1320

845

1321

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

846

1322

out_signature="s",

847

1323

path_keyword='object_path',

848

1324

connection_keyword='connection')

849

1325

def Introspect(self, object_path, connection):

850

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

1326

"""Overloading of standard D-Bus method.

1327

1328

Inserts property tags and interface annotation tags.

851

1329

"""

852

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

853

connection)

1330

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1331

object_path,

1332

connection)

854

1333

try:

855

1334

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

1335

856

1336

def make_tag(document, name, prop):

857

1337

e = document.createElement("property")

858

1338

e.setAttribute("name", name)

859

1339

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

860

1340

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

861

1341

return e

1342

862

1343

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

1344

# Add property tags

863

1345

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

864

1346

for name, prop

865

in self._get_all_dbus_properties()

1347

in self._get_all_dbus_things("property")

866

1348

if prop._dbus_interface

867

1349

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

868

1350

if_tag.appendChild(tag)

1351

# Add annotation tags for properties

1352

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

1353

annots = dict()

1354

for name, prop in self._get_all_dbus_things(

1355

"property"):

1356

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

1357

and prop._dbus_interface

1358

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

1359

annots.update(getattr(

1360

prop, "_dbus_annotations", {}))

1361

for name, value in annots.items():

1362

ann_tag = document.createElement(

1363

"annotation")

1364

ann_tag.setAttribute("name", name)

1365

ann_tag.setAttribute("value", value)

1366

tag.appendChild(ann_tag)

869

1367

# Add the names to the return values for the

870

1368

# "org.freedesktop.DBus.Properties" methods

871

1369

if (if_tag.getAttribute("name")

886

1384

except (AttributeError, xml.dom.DOMException,

887

1385

xml.parsers.expat.ExpatError) as error:

888

1386

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

889

error)

890

return xmlstring

891

892

893

def datetime_to_dbus (dt, variant_level=0):

1387

exc_info=error)

1388

return xmlstring

1389

1390

try:

1391

dbus.OBJECT_MANAGER_IFACE

1392

except AttributeError:

1393

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

1394

1395

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1396

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

1397

1398

Classes inheriting from this exposes the standard

1399

GetManagedObjects call and the InterfacesAdded and

1400

InterfacesRemoved signals on the standard

1401

"org.freedesktop.DBus.ObjectManager" interface.

1402

1403

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

1404

manually.

1405

"""

1406

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1407

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

1408

def GetManagedObjects(self):

1409

"""This function must be overridden"""

1410

raise NotImplementedError()

1411

1412

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1413

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

1414

def InterfacesAdded(self, object_path, interfaces_and_properties):

1415

pass

1416

1417

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

1418

def InterfacesRemoved(self, object_path, interfaces):

1419

pass

1420

1421

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1422

out_signature = "s",

1423

path_keyword = 'object_path',

1424

connection_keyword = 'connection')

1425

def Introspect(self, object_path, connection):

1426

"""Overloading of standard D-Bus method.

1427

1428

Override return argument name of GetManagedObjects to be

1429

"objpath_interfaces_and_properties"

1430

"""

1431

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1432

object_path,

1433

connection)

1434

try:

1435

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

1436

1437

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

1438

# Fix argument name for the GetManagedObjects method

1439

if (if_tag.getAttribute("name")

1440

== dbus.OBJECT_MANAGER_IFACE):

1441

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

1442

if (cn.getAttribute("name")

1443

== "GetManagedObjects"):

1444

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

1445

if (arg.getAttribute("direction")

1446

== "out"):

1447

arg.setAttribute(

1448

"name",

1449

"objpath_interfaces"

1450

"_and_properties")

1451

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

1452

document.unlink()

1453

except (AttributeError, xml.dom.DOMException,

1454

xml.parsers.expat.ExpatError) as error:

1455

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

1456

exc_info = error)

1457

return xmlstring

1458

1459

def datetime_to_dbus(dt, variant_level=0):

894

1460

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

895

1461

if dt is None:

896

1462

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

897

return dbus.String(dt.isoformat(),

898

variant_level=variant_level)

899

900

901

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

902

.__metaclass__):

903

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

904

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

1463

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

1464

1465

1466

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1467

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

1468

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

1469

interface names according to the "alt_interface_names" mapping.

1470

Usage:

1471

1472

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

1473

"net.example.AlternateInterface"})

1474

class SampleDBusObject(dbus.service.Object):

1475

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

1476

def SampleDBusMethod():

1477

pass

1478

1479

The above "SampleDBusMethod" on "SampleDBusObject" will be

1480

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

1481

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

1482

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

1483

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

1484

1485

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

1486

(from DBusObjectWithProperties) and interfaces (from the

1487

dbus_interface_annotations decorator).

905

1488

"""

906

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

907

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

908

# methods, signals, or properties in them

909

for base in (b for b in bases

910

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

911

# Go though all attributes of the base class

912

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

1489

1490

def wrapper(cls):

1491

for orig_interface_name, alt_interface_name in (

1492

alt_interface_names.items()):

1493

attr = {}

1494

interface_names = set()

1495

# Go though all attributes of the class

1496

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

913

1497

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

914

1498

# with the wrong interface name

915

1499

if (not hasattr(attribute, "_dbus_interface")

916

or not attribute._dbus_interface

917

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

1500

or not attribute._dbus_interface.startswith(

1501

orig_interface_name)):

918

1502

continue

919

1503

# Create an alternate D-Bus interface name based on

920

1504

# the current name

921

alt_interface = (attribute._dbus_interface

922

.replace("se.recompile.Mandos",

923

"se.bsnet.fukt.Mandos"))

1505

alt_interface = attribute._dbus_interface.replace(

1506

orig_interface_name, alt_interface_name)

1507

interface_names.add(alt_interface)

924

1508

# Is this a D-Bus signal?

925

1509

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

926

# Extract the original non-method function by

927

# black magic

928

nonmethod_func = (dict(

1510

if sys.version_info.major == 2:

1511

# Extract the original non-method undecorated

1512

# function by black magic

1513

nonmethod_func = (dict(

929

1514

zip(attribute.func_code.co_freevars,

930

attribute.__closure__))["func"]

931

.cell_contents)

1515

attribute.__closure__))

1516

["func"].cell_contents)

1517

else:

1518

nonmethod_func = attribute

932

1519

# Create a new, but exactly alike, function

933

1520

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

934

1521

# with the alternate D-Bus interface name

935

new_function = (dbus.service.signal

936

(alt_interface,

937

attribute._dbus_signature)

938

(types.FunctionType(

939

nonmethod_func.func_code,

940

nonmethod_func.func_globals,

941

nonmethod_func.func_name,

942

nonmethod_func.func_defaults,

943

nonmethod_func.func_closure)))

1522

if sys.version_info.major == 2:

1523

new_function = types.FunctionType(

1524

nonmethod_func.func_code,

1525

nonmethod_func.func_globals,

1526

nonmethod_func.func_name,

1527

nonmethod_func.func_defaults,

1528

nonmethod_func.func_closure)

1529

else:

1530

new_function = types.FunctionType(

1531

nonmethod_func.__code__,

1532

nonmethod_func.__globals__,

1533

nonmethod_func.__name__,

1534

nonmethod_func.__defaults__,

1535

nonmethod_func.__closure__)

1536

new_function = (dbus.service.signal(

1537

alt_interface,

1538

attribute._dbus_signature)(new_function))

1539

# Copy annotations, if any

1540

try:

1541

new_function._dbus_annotations = dict(

1542

attribute._dbus_annotations)

1543

except AttributeError:

1544

pass

944

1545

# Define a creator of a function to call both the

945

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

946

# signals gets sent when the function is called

1546

# original and alternate functions, so both the

1547

# original and alternate signals gets sent when

1548

# the function is called

947

1549

def fixscope(func1, func2):

948

1550

"""This function is a scope container to pass

949

1551

func1 and func2 to the "call_both" function

950

1552

outside of its arguments"""

1553

1554

@functools.wraps(func2)

951

1555

def call_both(*args, **kwargs):

952

1556

"""This function will emit two D-Bus

953

1557

signals by calling func1 and func2"""

954

1558

func1(*args, **kwargs)

955

1559

func2(*args, **kwargs)

1560

# Make wrapper function look like a D-Bus signal

1561

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

1562

if name.startswith("_dbus_"):

1563

setattr(call_both, name, attr)

1564

956

1565

return call_both

957

1566

# Create the "call_both" function and add it to

958

1567

# the class

959

attr[attrname] = fixscope(attribute,

960

new_function)

1568

attr[attrname] = fixscope(attribute, new_function)

961

1569

# Is this a D-Bus method?

962

1570

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

963

1571

# Create a new, but exactly alike, function

964

1572

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

965

1573

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

966

1574

# to the class.

967

attr[attrname] = (dbus.service.method

968

(alt_interface,

969

attribute._dbus_in_signature,

970

attribute._dbus_out_signature)

971

(types.FunctionType

972

(attribute.func_code,

973

attribute.func_globals,

974

attribute.func_name,

975

attribute.func_defaults,

976

attribute.func_closure)))

1575

attr[attrname] = (

1576

dbus.service.method(

1577

alt_interface,

1578

attribute._dbus_in_signature,

1579

attribute._dbus_out_signature)

1580

(types.FunctionType(attribute.func_code,

1581

attribute.func_globals,

1582

attribute.func_name,

1583

attribute.func_defaults,

1584

attribute.func_closure)))

1585

# Copy annotations, if any

1586

try:

1587

attr[attrname]._dbus_annotations = dict(

1588

attribute._dbus_annotations)

1589

except AttributeError:

1590

pass

977

1591

# Is this a D-Bus property?

978

1592

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

979

1593

# Create a new, but exactly alike, function

980

1594

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

981

1595

# property with the alternate D-Bus interface

982

1596

# name. Add it to the class.

983

attr[attrname] = (dbus_service_property

984

(alt_interface,

985

attribute._dbus_signature,

986

attribute._dbus_access,

987

attribute

988

._dbus_get_args_options

989

["byte_arrays"])

990

(types.FunctionType

991

(attribute.func_code,

992

attribute.func_globals,

993

attribute.func_name,

994

attribute.func_defaults,

995

attribute.func_closure)))

996

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

997

998

1597

attr[attrname] = (dbus_service_property(

1598

alt_interface, attribute._dbus_signature,

1599

attribute._dbus_access,

1600

attribute._dbus_get_args_options

1601

["byte_arrays"])

1602

(types.FunctionType(

1603

attribute.func_code,

1604

attribute.func_globals,

1605

attribute.func_name,

1606

attribute.func_defaults,

1607

attribute.func_closure)))

1608

# Copy annotations, if any

1609

try:

1610

attr[attrname]._dbus_annotations = dict(

1611

attribute._dbus_annotations)

1612

except AttributeError:

1613

pass

1614

# Is this a D-Bus interface?

1615

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

1616

# Create a new, but exactly alike, function

1617

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

1618

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

1619

# to the class.

1620

attr[attrname] = (

1621

dbus_interface_annotations(alt_interface)

1622

(types.FunctionType(attribute.func_code,

1623

attribute.func_globals,

1624

attribute.func_name,

1625

attribute.func_defaults,

1626

attribute.func_closure)))

1627

if deprecate:

1628

# Deprecate all alternate interfaces

1629

iname="_AlternateDBusNames_interface_annotation{}"

1630

for interface_name in interface_names:

1631

1632

@dbus_interface_annotations(interface_name)

1633

def func(self):

1634

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

1635

"true" }

1636

# Find an unused name

1637

for aname in (iname.format(i)

1638

for i in itertools.count()):

1639

if aname not in attr:

1640

attr[aname] = func

1641

break

1642

if interface_names:

1643

# Replace the class with a new subclass of it with

1644

# methods, signals, etc. as created above.

1645

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

1646

(cls, ), attr)

1647

return cls

1648

1649

return wrapper

1650

1651

1652

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

1653

"se.bsnet.fukt.Mandos"})

999

1654

class ClientDBus(Client, DBusObjectWithProperties):

1000

1655

"""A Client class using D-Bus

1001

1656

1005

1660

"""

1006

1661

1007

1662

runtime_expansions = (Client.runtime_expansions

1008

+ ("dbus_object_path",))

1663

+ ("dbus_object_path", ))

1664

1665

_interface = "se.recompile.Mandos.Client"

1009

1666

1010

1667

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

1011

1668

1012

1669

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

1013

1670

self.bus = bus

1014

1671

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

1015

1016

self._approvals_pending = 0

1017

1672

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

1018

1673

# the D-Bus

1019

client_object_name = unicode(self.name).translate(

1674

client_object_name = str(self.name).translate(

1020

1675

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

1021

1676

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

1022

self.dbus_object_path = (dbus.ObjectPath

1023

("/clients/" + client_object_name))

1677

self.dbus_object_path = dbus.ObjectPath(

1678

"/clients/" + client_object_name)

1024

1679

DBusObjectWithProperties.__init__(self, self.bus,

1025

1680

self.dbus_object_path)

1026

1027

def notifychangeproperty(transform_func,

1028

dbus_name, type_func=lambda x: x,

1029

variant_level=1):

1681

1682

def notifychangeproperty(transform_func, dbus_name,

1683

type_func=lambda x: x,

1684

variant_level=1,

1685

invalidate_only=False,

1686

_interface=_interface):

1030

1687

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

1031

1688

its changes to DBus.

1032

1689

1037

1694

to the D-Bus. Default: no transform

1038

1695

variant_level: D-Bus variant level. Default: 1

1039

1696

"""

1040

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

1697

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

1698

1041

1699

def setter(self, value):

1042

1700

if hasattr(self, "dbus_object_path"):

1043

1701

if (not hasattr(self, attrname) or

1044

1702

type_func(getattr(self, attrname, None))

1045

1703

!= type_func(value)):

1046

dbus_value = transform_func(type_func(value),

1047

variant_level

1048

=variant_level)

1049

self.PropertyChanged(dbus.String(dbus_name),

1050

dbus_value)

1704

if invalidate_only:

1705

self.PropertiesChanged(

1706

_interface, dbus.Dictionary(),

1707

dbus.Array((dbus_name, )))

1708

else:

1709

dbus_value = transform_func(

1710

type_func(value),

1711

variant_level = variant_level)

1712

self.PropertyChanged(dbus.String(dbus_name),

1713

dbus_value)

1714

self.PropertiesChanged(

1715

_interface,

1716

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

1717

dbus_value }),

1718

dbus.Array())

1051

1719

setattr(self, attrname, value)

1052

1720

1053

1721

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

1054

1722

1055

1056

1723

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1057

1724

approvals_pending = notifychangeproperty(dbus.Boolean,

1058

1725

"ApprovalPending",

1060

1727

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

1061

1728

last_enabled = notifychangeproperty(datetime_to_dbus,

1062

1729

"LastEnabled")

1063

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

1064

type_func = lambda checker:

1065

checker is not None)

1730

checker = notifychangeproperty(

1731

dbus.Boolean, "CheckerRunning",

1732

type_func = lambda checker: checker is not None)

1066

1733

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1067

1734

"LastCheckedOK")

1735

last_checker_status = notifychangeproperty(dbus.Int16,

1736

"LastCheckerStatus")

1068

1737

last_approval_request = notifychangeproperty(

1069

1738

datetime_to_dbus, "LastApprovalRequest")

1070

1739

approved_by_default = notifychangeproperty(dbus.Boolean,

1071

1740

"ApprovedByDefault")

1072

approval_delay = notifychangeproperty(dbus.UInt16,

1073

"ApprovalDelay",

1074

type_func =

1075

_timedelta_to_milliseconds)

1741

approval_delay = notifychangeproperty(

1742

dbus.UInt64, "ApprovalDelay",

1743

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

1076

1744

approval_duration = notifychangeproperty(

1077

dbus.UInt16, "ApprovalDuration",

1078

type_func = _timedelta_to_milliseconds)

1745

dbus.UInt64, "ApprovalDuration",

1746

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

1079

1747

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

1080

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

1081

type_func =

1082

_timedelta_to_milliseconds)

1748

timeout = notifychangeproperty(

1749

dbus.UInt64, "Timeout",

1750

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

1083

1751

extended_timeout = notifychangeproperty(

1084

dbus.UInt16, "ExtendedTimeout",

1085

type_func = _timedelta_to_milliseconds)

1086

interval = notifychangeproperty(dbus.UInt16,

1087

"Interval",

1088

type_func =

1089

_timedelta_to_milliseconds)

1752

dbus.UInt64, "ExtendedTimeout",

1753

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

1754

interval = notifychangeproperty(

1755

dbus.UInt64, "Interval",

1756

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

1090

1757

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

1758

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

1759

invalidate_only=True)

1091

1760

1092

1761

del notifychangeproperty

1093

1762

1100

1769

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

1101

1770

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

1102

1771

1103

def checker_callback(self, pid, condition, command,

1104

*args, **kwargs):

1105

self.checker_callback_tag = None

1106

self.checker = None

1107

if os.WIFEXITED(condition):

1108

exitstatus = os.WEXITSTATUS(condition)

1772

def checker_callback(self, source, condition,

1773

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

1774

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

1775

connection, command, *args,

1776

**kwargs)

1777

exitstatus = self.last_checker_status

1778

if exitstatus >= 0:

1109

1779

# Emit D-Bus signal

1110

1780

self.CheckerCompleted(dbus.Int16(exitstatus),

1111

dbus.Int64(condition),

1781

# This is specific to GNU libC

1782

dbus.Int64(exitstatus << 8),

1112

1783

dbus.String(command))

1113

1784

else:

1114

1785

# Emit D-Bus signal

1115

1786

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

1116

dbus.Int64(condition),

1787

dbus.Int64(

1788

# This is specific to GNU libC

1789

(exitstatus << 8)

1790

| self.last_checker_signal),

1117

1791

dbus.String(command))

1118

1119

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

1120

*args, **kwargs)

1792

return ret

1121

1793

1122

1794

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

1123

old_checker = self.checker

1124

if self.checker is not None:

1125

old_checker_pid = self.checker.pid

1126

else:

1127

old_checker_pid = None

1795

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

1128

1796

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

1129

1797

# Only if new checker process was started

1130

1798

if (self.checker is not None

1134

1802

return r

1135

1803

1136

1804

def _reset_approved(self):

1137

self._approved = None

1805

self.approved = None

1138

1806

return False

1139

1807

1140

1808

def approve(self, value=True):

1809

self.approved = value

1810

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

1811

* 1000), self._reset_approved)

1141

1812

self.send_changedstate()

1142

self._approved = value

1143

gobject.timeout_add(_timedelta_to_milliseconds

1144

(self.approval_duration),

1145

self._reset_approved)

1146

1147

1813

1148

1814

## D-Bus methods, signals & properties

1149

_interface = "se.recompile.Mandos.Client"

1815

1816

## Interfaces

1150

1817

1151

1818

## Signals

1152

1819

1163

1830

pass

1164

1831

1165

1832

# PropertyChanged - signal

1833

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

1166

1834

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

1167

1835

def PropertyChanged(self, property, value):

1168

1836

"D-Bus signal"

1189

1857

"D-Bus signal"

1190

1858

return self.need_approval()

1191

1859

1192

# NeRwequest - signal

1193

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

1194

def NewRequest(self, ip):

1195

"""D-Bus signal

1196

Is sent after a client request a password.

1197

"""

1198

pass

1199

1200

1860

## Methods

1201

1861

1202

1862

# Approve - method

1210

1870

self.checked_ok()

1211

1871

1212

1872

# Enable - method

1873

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

1213

1874

@dbus.service.method(_interface)

1214

1875

def Enable(self):

1215

1876

"D-Bus method"

1216

1877

self.enable()

1217

1878

1218

1879

# StartChecker - method

1880

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

1219

1881

@dbus.service.method(_interface)

1220

1882

def StartChecker(self):

1221

1883

"D-Bus method"

1222

1884

self.start_checker()

1223

1885

1224

1886

# Disable - method

1887

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

1225

1888

@dbus.service.method(_interface)

1226

1889

def Disable(self):

1227

1890

"D-Bus method"

1228

1891

self.disable()

1229

1892

1230

1893

# StopChecker - method

1894

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

1231

1895

@dbus.service.method(_interface)

1232

1896

def StopChecker(self):

1233

1897

self.stop_checker()

1240

1904

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

1241

1905

1242

1906

# ApprovedByDefault - property

1243

@dbus_service_property(_interface, signature="b",

1907

@dbus_service_property(_interface,

1908

signature="b",

1244

1909

access="readwrite")

1245

1910

def ApprovedByDefault_dbus_property(self, value=None):

1246

1911

if value is None: # get

1248

1913

self.approved_by_default = bool(value)

1249

1914

1250

1915

# ApprovalDelay - property

1251

@dbus_service_property(_interface, signature="t",

1916

@dbus_service_property(_interface,

1917

signature="t",

1252

1918

access="readwrite")

1253

1919

def ApprovalDelay_dbus_property(self, value=None):

1254

1920

if value is None: # get

1255

return dbus.UInt64(self.approval_delay_milliseconds())

1921

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

1922

* 1000)

1256

1923

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

1257

1924

1258

1925

# ApprovalDuration - property

1259

@dbus_service_property(_interface, signature="t",

1926

@dbus_service_property(_interface,

1927

signature="t",

1260

1928

access="readwrite")

1261

1929

def ApprovalDuration_dbus_property(self, value=None):

1262

1930

if value is None: # get

1263

return dbus.UInt64(_timedelta_to_milliseconds(

1264

self.approval_duration))

1931

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

1932

* 1000)

1265

1933

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

1266

1934

1267

1935

# Name - property

1936

@dbus_annotations(

1937

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

1268

1938

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

1269

1939

def Name_dbus_property(self):

1270

1940

return dbus.String(self.name)

1271

1941

1272

1942

# Fingerprint - property

1943

@dbus_annotations(

1944

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

1273

1945

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

1274

1946

def Fingerprint_dbus_property(self):

1275

1947

return dbus.String(self.fingerprint)

1276

1948

1277

1949

# Host - property

1278

@dbus_service_property(_interface, signature="s",

1950

@dbus_service_property(_interface,

1951

signature="s",

1279

1952

access="readwrite")

1280

1953

def Host_dbus_property(self, value=None):

1281

1954

if value is None: # get

1282

1955

return dbus.String(self.host)

1283

self.host = value

1956

self.host = str(value)

1284

1957

1285

1958

# Created - property

1959

@dbus_annotations(

1960

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

1286

1961

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

1287

1962

def Created_dbus_property(self):

1288

1963

return datetime_to_dbus(self.created)

1293

1968

return datetime_to_dbus(self.last_enabled)

1294

1969

1295

1970

# Enabled - property

1296

@dbus_service_property(_interface, signature="b",

1971

@dbus_service_property(_interface,

1972

signature="b",

1297

1973

access="readwrite")

1298

1974

def Enabled_dbus_property(self, value=None):

1299

1975

if value is None: # get

1304

1980

self.disable()

1305

1981

1306

1982

# LastCheckedOK - property

1307

@dbus_service_property(_interface, signature="s",

1983

@dbus_service_property(_interface,

1984

signature="s",

1308

1985

access="readwrite")

1309

1986

def LastCheckedOK_dbus_property(self, value=None):

1310

1987

if value is not None:

1312

1989

return

1313

1990

return datetime_to_dbus(self.last_checked_ok)

1314

1991

1992

# LastCheckerStatus - property

1993

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

1994

def LastCheckerStatus_dbus_property(self):

1995

return dbus.Int16(self.last_checker_status)

1996

1315

1997

# Expires - property

1316

1998

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

1317

1999

def Expires_dbus_property(self):

1323

2005

return datetime_to_dbus(self.last_approval_request)

1324

2006

1325

2007

# Timeout - property

1326

@dbus_service_property(_interface, signature="t",

2008

@dbus_service_property(_interface,

2009

signature="t",

1327

2010

access="readwrite")

1328

2011

def Timeout_dbus_property(self, value=None):

1329

2012

if value is None: # get

1330

return dbus.UInt64(self.timeout_milliseconds())

2013

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

2014

old_timeout = self.timeout

1331

2015

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

1332

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

1333

return

1334

# Reschedule timeout

1335

gobject.source_remove(self.disable_initiator_tag)

1336

self.disable_initiator_tag = None

1337

self.expires = None

1338

time_to_die = _timedelta_to_milliseconds((self

1339

.last_checked_ok

1340

+ self.timeout)

1341

- datetime.datetime

1342

.utcnow())

1343

if time_to_die <= 0:

1344

# The timeout has passed

1345

self.disable()

1346

else:

1347

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

1348

+ datetime.timedelta(milliseconds =

1349

time_to_die))

1350

self.disable_initiator_tag = (gobject.timeout_add

1351

(time_to_die, self.disable))

2016

# Reschedule disabling

2017

if self.enabled:

2018

now = datetime.datetime.utcnow()

2019

self.expires += self.timeout - old_timeout

2020

if self.expires <= now:

2021

# The timeout has passed

2022

self.disable()

2023

else:

2024

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

2025

is None):

2026

return

2027

gobject.source_remove(self.disable_initiator_tag)

2028

self.disable_initiator_tag = gobject.timeout_add(

2029

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

2030

self.disable)

1352

2031

1353

2032

# ExtendedTimeout - property

1354

@dbus_service_property(_interface, signature="t",

2033

@dbus_service_property(_interface,

2034

signature="t",

1355

2035

access="readwrite")

1356

2036

def ExtendedTimeout_dbus_property(self, value=None):

1357

2037

if value is None: # get

1358

return dbus.UInt64(self.extended_timeout_milliseconds())

2038

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

2039

* 1000)

1359

2040

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

1360

2041

1361

2042

# Interval - property

1362

@dbus_service_property(_interface, signature="t",

2043

@dbus_service_property(_interface,

2044

signature="t",

1363

2045

access="readwrite")

1364

2046

def Interval_dbus_property(self, value=None):

1365

2047

if value is None: # get

1366

return dbus.UInt64(self.interval_milliseconds())

2048

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

1367

2049

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

1368

2050

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

1369

2051

return

1370

2052

if self.enabled:

1371

2053

# Reschedule checker run

1372

2054

gobject.source_remove(self.checker_initiator_tag)

1373

self.checker_initiator_tag = (gobject.timeout_add

1374

(value, self.start_checker))

1375

self.start_checker() # Start one now, too

2055

self.checker_initiator_tag = gobject.timeout_add(

2056

value, self.start_checker)

2057

self.start_checker() # Start one now, too

1376

2058

1377

2059

# Checker - property

1378

@dbus_service_property(_interface, signature="s",

2060

@dbus_service_property(_interface,

2061

signature="s",

1379

2062

access="readwrite")

1380

2063

def Checker_dbus_property(self, value=None):

1381

2064

if value is None: # get

1382

2065

return dbus.String(self.checker_command)

1383

self.checker_command = value

2066

self.checker_command = str(value)

1384

2067

1385

2068

# CheckerRunning - property

1386

@dbus_service_property(_interface, signature="b",

2069

@dbus_service_property(_interface,

2070

signature="b",

1387

2071

access="readwrite")

1388

2072

def CheckerRunning_dbus_property(self, value=None):

1389

2073

if value is None: # get

1394

2078

self.stop_checker()

1395

2079

1396

2080

# ObjectPath - property

2081

@dbus_annotations(

2082

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

2083

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

1397

2084

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

1398

2085

def ObjectPath_dbus_property(self):

1399

2086

return self.dbus_object_path # is already a dbus.ObjectPath

1400

2087

1401

2088

# Secret = property

1402

@dbus_service_property(_interface, signature="ay",

1403

access="write", byte_arrays=True)

2089

@dbus_annotations(

2090

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

2091

"invalidates"})

2092

@dbus_service_property(_interface,

2093

signature="ay",

2094

access="write",

2095

byte_arrays=True)

1404

2096

def Secret_dbus_property(self, value):

1405

self.secret = str(value)

2097

self.secret = bytes(value)

1406

2098

1407

2099

del _interface

1408

2100

1412

2104

self._pipe = child_pipe

1413

2105

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

1414

2106

if not self._pipe.recv():

1415

raise KeyError()

2107

raise KeyError(fpr)

1416

2108

1417

2109

def __getattribute__(self, name):

1418

if(name == '_pipe'):

2110

if name == '_pipe':

1419

2111

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

1420

2112

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

1421

2113

data = self._pipe.recv()

1422

2114

if data[0] == 'data':

1423

2115

return data[1]

1424

2116

if data[0] == 'function':

2117

1425

2118

def func(*args, **kwargs):

1426

2119

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

1427

2120

return self._pipe.recv()[1]

2121

1428

2122

return func

1429

2123

1430

2124

def __setattr__(self, name, value):

1431

if(name == '_pipe'):

2125

if name == '_pipe':

1432

2126

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

1433

2127

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

1434

2128

1435

2129

1436

class ClientDBusTransitional(ClientDBus):

1437

__metaclass__ = AlternateDBusNamesMetaclass

1438

1439

1440

2130

class ClientHandler(socketserver.BaseRequestHandler, object):

1441

2131

"""A class to handle client connections.

1442

2132

1446

2136

def handle(self):

1447

2137

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

1448

2138

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

1449

unicode(self.client_address))

2139

str(self.client_address))

1450

2140

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

1451

2141

self.server.child_pipe.fileno())

1452

2142

1453

session = (gnutls.connection

1454

.ClientSession(self.request,

1455

gnutls.connection

1456

.X509Credentials()))

1457

1458

# Note: gnutls.connection.X509Credentials is really a

1459

# generic GnuTLS certificate credentials object so long as

1460

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

1461

# here despite using OpenPGP certificates.

2143

session = gnutls.ClientSession(self.request)

1462

2144

1463

2145

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

1464

2146

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

1468

2150

priority = self.server.gnutls_priority

1469

2151

if priority is None:

1470

2152

priority = "NORMAL"

1471

(gnutls.library.functions

1472

.gnutls_priority_set_direct(session._c_object,

1473

priority, None))

2153

gnutls.priority_set_direct(session._c_object, priority,

2154

None)

1474

2155

1475

2156

# Start communication using the Mandos protocol

1476

2157

# Get protocol number

1478

2159

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

1479

2160

try:

1480

2161

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

1481

raise RuntimeError

2162

raise RuntimeError(line)

1482

2163

except (ValueError, IndexError, RuntimeError) as error:

1483

2164

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

1484

2165

return

1486

2167

# Start GnuTLS connection

1487

2168

try:

1488

2169

session.handshake()

1489

except gnutls.errors.GNUTLSError as error:

2170

except gnutls.Error as error:

1490

2171

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

1491

2172

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

1492

2173

# established. Just abandon the request.

1496

2177

approval_required = False

1497

2178

try:

1498

2179

try:

1499

fpr = self.fingerprint(self.peer_certificate

1500

(session))

1501

except (TypeError,

1502

gnutls.errors.GNUTLSError) as error:

2180

fpr = self.fingerprint(

2181

self.peer_certificate(session))

2182

except (TypeError, gnutls.Error) as error:

1503

2183

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

1504

2184

return

1505

2185

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

1506

if self.server.use_dbus:

1507

# Emit D-Bus signal

1508

client.NewRequest(str(self.client_address))

1509

2186

1510

2187

try:

1511

2188

client = ProxyClient(child_pipe, fpr,

1521

2198

while True:

1522

2199

if not client.enabled:

1523

2200

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

1524

client.name)

2201

client.name)

1525

2202

if self.server.use_dbus:

1526

2203

# Emit D-Bus signal

1527

2204

client.Rejected("Disabled")

1528

2205

return

1529

2206

1530

if client._approved or not client.approval_delay:

2207

if client.approved or not client.approval_delay:

1531

2208

#We are approved or approval is disabled

1532

2209

break

1533

elif client._approved is None:

2210

elif client.approved is None:

1534

2211

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

1535

2212

client.name)

1536

2213

if self.server.use_dbus:

1537

2214

# Emit D-Bus signal

1538

2215

client.NeedApproval(

1539

client.approval_delay_milliseconds(),

1540

client.approved_by_default)

2216

client.approval_delay.total_seconds()

2217

* 1000, client.approved_by_default)

1541

2218

else:

1542

2219

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

1543

2220

client.name)

1549

2226

#wait until timeout or approved

1550

2227

time = datetime.datetime.now()

1551

2228

client.changedstate.acquire()

1552

(client.changedstate.wait

1553

(float(client._timedelta_to_milliseconds(delay)

1554

/ 1000)))

2229

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

1555

2230

client.changedstate.release()

1556

2231

time2 = datetime.datetime.now()

1557

2232

if (time2 - time) >= delay:

1568

2243

else:

1569

2244

delay -= time2 - time

1570

2245

1571

sent_size = 0

1572

while sent_size < len(client.secret):

1573

try:

1574

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

1575

except gnutls.errors.GNUTLSError as error:

1576

logger.warning("gnutls send failed")

1577

return

1578

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

1579

sent, len(client.secret)

1580

- (sent_size + sent))

1581

sent_size += sent

2246

try:

2247

session.send(client.secret)

2248

except gnutls.Error as error:

2249

logger.warning("gnutls send failed",

2250

exc_info = error)

2251

return

1582

2252

1583

2253

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

1584

2254

# bump the timeout using extended_timeout

1585

client.checked_ok(client.extended_timeout)

2255

client.bump_timeout(client.extended_timeout)

1586

2256

if self.server.use_dbus:

1587

2257

# Emit D-Bus signal

1588

2258

client.GotSecret()

1592

2262

client.approvals_pending -= 1

1593

2263

try:

1594

2264

session.bye()

1595

except gnutls.errors.GNUTLSError as error:

1596

logger.warning("GnuTLS bye failed")

2265

except gnutls.Error as error:

2266

logger.warning("GnuTLS bye failed",

2267

exc_info=error)

1597

2268

1598

2269

@staticmethod

1599

2270

def peer_certificate(session):

1600

2271

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

1601

2272

# If not an OpenPGP certificate...

1602

if (gnutls.library.functions

1603

.gnutls_certificate_type_get(session._c_object)

1604

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1605

# ...do the normal thing

1606

return session.peer_certificate

2273

if (gnutls.certificate_type_get(session._c_object)

2274

!= gnutls.CRT_OPENPGP):

2275

# ...return invalid data

2276

return b""

1607

2277

list_size = ctypes.c_uint(1)

1608

cert_list = (gnutls.library.functions

1609

.gnutls_certificate_get_peers

2278

cert_list = (gnutls.certificate_get_peers

1610

2279

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

1611

2280

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

1612

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

1613

" certificate")

2281

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

1614

2282

if list_size.value == 0:

1615

2283

return None

1616

2284

cert = cert_list[0]

1620

2288

def fingerprint(openpgp):

1621

2289

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1622

2290

# New GnuTLS "datum" with the OpenPGP public key

1623

datum = (gnutls.library.types

1624

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

1625

ctypes.POINTER

1626

(ctypes.c_ubyte)),

1627

ctypes.c_uint(len(openpgp))))

2291

datum = gnutls.datum_t(

2292

ctypes.cast(ctypes.c_char_p(openpgp),

2293

ctypes.POINTER(ctypes.c_ubyte)),

2294

ctypes.c_uint(len(openpgp)))

1628

2295

# New empty GnuTLS certificate

1629

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1630

(gnutls.library.functions

1631

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2296

crt = gnutls.openpgp_crt_t()

2297

gnutls.openpgp_crt_init(ctypes.byref(crt))

1632

2298

# Import the OpenPGP public key into the certificate

1633

(gnutls.library.functions

1634

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

1635

gnutls.library.constants

1636

.GNUTLS_OPENPGP_FMT_RAW))

2299

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

2300

gnutls.OPENPGP_FMT_RAW)

1637

2301

# Verify the self signature in the key

1638

2302

crtverify = ctypes.c_uint()

1639

(gnutls.library.functions

1640

.gnutls_openpgp_crt_verify_self(crt, 0,

1641

ctypes.byref(crtverify)))

2303

gnutls.openpgp_crt_verify_self(crt, 0,

2304

ctypes.byref(crtverify))

1642

2305

if crtverify.value != 0:

1643

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1644

raise (gnutls.errors.CertificateSecurityError

1645

("Verify failed"))

2306

gnutls.openpgp_crt_deinit(crt)

2307

raise gnutls.CertificateSecurityError("Verify failed")

1646

2308

# New buffer for the fingerprint

1647

2309

buf = ctypes.create_string_buffer(20)

1648

2310

buf_len = ctypes.c_size_t()

1649

2311

# Get the fingerprint from the certificate into the buffer

1650

(gnutls.library.functions

1651

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

1652

ctypes.byref(buf_len)))

2312

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

2313

ctypes.byref(buf_len))

1653

2314

# Deinit the certificate

1654

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2315

gnutls.openpgp_crt_deinit(crt)

1655

2316

# Convert the buffer to a Python bytestring

1656

2317

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

1657

2318

# Convert the bytestring to hexadecimal notation

1661

2322

1662

2323

class MultiprocessingMixIn(object):

1663

2324

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

2325

1664

2326

def sub_process_main(self, request, address):

1665

2327

try:

1666

2328

self.finish_request(request, address)

1667

except:

2329

except Exception:

1668

2330

self.handle_error(request, address)

1669

2331

self.close_request(request)

1670

2332

1671

2333

def process_request(self, request, address):

1672

2334

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

1673

2335

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

1674

args = (request,

1675

address))

2336

args = (request, address))

1676

2337

proc.start()

1677

2338

return proc

1678

2339

1679

2340

1680

2341

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1681

2342

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

2343

1682

2344

def process_request(self, request, client_address):

1683

2345

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

1684

2346

1693

2355

1694

2356

def add_pipe(self, parent_pipe, proc):

1695

2357

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

1696

raise NotImplementedError

2358

raise NotImplementedError()

1697

2359

1698

2360

1699

2361

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1705

2367

interface: None or a network interface name (string)

1706

2368

use_ipv6: Boolean; to use IPv6 or not

1707

2369

"""

2370

1708

2371

def __init__(self, server_address, RequestHandlerClass,

1709

interface=None, use_ipv6=True):

2372

interface=None,

2373

use_ipv6=True,

2374

socketfd=None):

2375

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

2376

creating a new one with socket.socket().

2377

"""

1710

2378

self.interface = interface

1711

2379

if use_ipv6:

1712

2380

self.address_family = socket.AF_INET6

2381

if socketfd is not None:

2382

# Save the file descriptor

2383

self.socketfd = socketfd

2384

# Save the original socket.socket() function

2385

self.socket_socket = socket.socket

2386

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

2387

#

2388

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

2389

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

2390

# patching socket.socket.)

2391

#

2392

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

2393

@functools.wraps(socket.socket)

2394

def socket_wrapper(*args, **kwargs):

2395

# Restore original function so subsequent calls are

2396

# not affected.

2397

socket.socket = self.socket_socket

2398

del self.socket_socket

2399

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

2400

# saved file descriptor.

2401

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

2402

# Replace socket.socket() function with wrapper

2403

socket.socket = socket_wrapper

2404

# The socketserver.TCPServer.__init__ will call

2405

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

2406

# socket_wrapper(), if socketfd was set.

1713

2407

socketserver.TCPServer.__init__(self, server_address,

1714

2408

RequestHandlerClass)

2409

1715

2410

def server_bind(self):

1716

2411

"""This overrides the normal server_bind() function

1717

2412

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

1723

2418

self.interface)

1724

2419

else:

1725

2420

try:

1726

self.socket.setsockopt(socket.SOL_SOCKET,

1727

SO_BINDTODEVICE,

1728

str(self.interface

1729

+ '\0'))

2421

self.socket.setsockopt(

2422

socket.SOL_SOCKET, SO_BINDTODEVICE,

2423

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

1730

2424

except socket.error as error:

1731

if error[0] == errno.EPERM:

1732

logger.error("No permission to"

1733

" bind to interface %s",

1734

self.interface)

1735

elif error[0] == errno.ENOPROTOOPT:

2425

if error.errno == errno.EPERM:

2426

logger.error("No permission to bind to"

2427

" interface %s", self.interface)

2428

elif error.errno == errno.ENOPROTOOPT:

1736

2429

logger.error("SO_BINDTODEVICE not available;"

1737

2430

" cannot bind to interface %s",

1738

2431

self.interface)

2432

elif error.errno == errno.ENODEV:

2433

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

2434

" cannot bind", self.interface)

1739

2435

else:

1740

2436

raise

1741

2437

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

1744

2440

if self.address_family == socket.AF_INET6:

1745

2441

any_address = "::" # in6addr_any

1746

2442

else:

1747

any_address = socket.INADDR_ANY

2443

any_address = "0.0.0.0" # INADDR_ANY

1748

2444

self.server_address = (any_address,

1749

2445

self.server_address[1])

1750

2446

elif not self.server_address[1]:

1751

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

1752

0)

2447

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

1753

2448

# if self.interface:

1754

2449

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

1755

2450

# 0, # port

1769

2464

1770

2465

Assumes a gobject.MainLoop event loop.

1771

2466

"""

2467

1772

2468

def __init__(self, server_address, RequestHandlerClass,

1773

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

1774

gnutls_priority=None, use_dbus=True):

2469

interface=None,

2470

use_ipv6=True,

2471

clients=None,

2472

gnutls_priority=None,

2473

use_dbus=True,

2474

socketfd=None):

1775

2475

self.enabled = False

1776

2476

self.clients = clients

1777

2477

if self.clients is None:

1781

2481

IPv6_TCPServer.__init__(self, server_address,

1782

2482

RequestHandlerClass,

1783

2483

interface = interface,

1784

use_ipv6 = use_ipv6)

2484

use_ipv6 = use_ipv6,

2485

socketfd = socketfd)

2486

1785

2487

def server_activate(self):

1786

2488

if self.enabled:

1787

2489

return socketserver.TCPServer.server_activate(self)

1791

2493

1792

2494

def add_pipe(self, parent_pipe, proc):

1793

2495

# Call "handle_ipc" for both data and EOF events

1794

gobject.io_add_watch(parent_pipe.fileno(),

1795

gobject.IO_IN | gobject.IO_HUP,

1796

functools.partial(self.handle_ipc,

1797

parent_pipe =

1798

parent_pipe,

1799

proc = proc))

2496

gobject.io_add_watch(

2497

parent_pipe.fileno(),

2498

gobject.IO_IN | gobject.IO_HUP,

2499

functools.partial(self.handle_ipc,

2500

parent_pipe = parent_pipe,

2501

proc = proc))

1800

2502

1801

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

1802

proc = None, client_object=None):

1803

condition_names = {

1804

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

1805

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

1806

# blocking).

1807

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

1808

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

1809

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

1810

# broken, usually for pipes and

1811

# sockets).

1812

}

1813

conditions_string = ' | '.join(name

1814

for cond, name in

1815

condition_names.iteritems()

1816

if cond & condition)

2503

def handle_ipc(self, source, condition,

2504

parent_pipe=None,

2505

proc = None,

2506

client_object=None):

1817

2507

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

1818

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

2508

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

1819

2509

# Wait for other process to exit

1820

2510

proc.join()

1821

2511

return False

1842

2532

parent_pipe.send(False)

1843

2533

return False

1844

2534

1845

gobject.io_add_watch(parent_pipe.fileno(),

1846

gobject.IO_IN | gobject.IO_HUP,

1847

functools.partial(self.handle_ipc,

1848

parent_pipe =

1849

parent_pipe,

1850

proc = proc,

1851

client_object =

1852

client))

2535

gobject.io_add_watch(

2536

parent_pipe.fileno(),

2537

gobject.IO_IN | gobject.IO_HUP,

2538

functools.partial(self.handle_ipc,

2539

parent_pipe = parent_pipe,

2540

proc = proc,

2541

client_object = client))

1853

2542

parent_pipe.send(True)

1854

2543

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

1855

2544

# same fileno

1861

2550

1862

2551

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

1863

2552

funcname)(*args,

1864

**kwargs)))

2553

**kwargs)))

1865

2554

1866

2555

if command == 'getattr':

1867

2556

attrname = request[1]

1868

if callable(client_object.__getattribute__(attrname)):

1869

parent_pipe.send(('function',))

2557

if isinstance(client_object.__getattribute__(attrname),

2558

collections.Callable):

2559

parent_pipe.send(('function', ))

1870

2560

else:

1871

parent_pipe.send(('data', client_object

1872

.__getattribute__(attrname)))

2561

parent_pipe.send((

2562

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

1873

2563

1874

2564

if command == 'setattr':

1875

2565

attrname = request[1]

1879

2569

return True

1880

2570

1881

2571

2572

def rfc3339_duration_to_delta(duration):

2573

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

2574

2575

>>> rfc3339_duration_to_delta("P7D")

2576

datetime.timedelta(7)

2577

>>> rfc3339_duration_to_delta("PT60S")

2578

datetime.timedelta(0, 60)

2579

>>> rfc3339_duration_to_delta("PT60M")

2580

datetime.timedelta(0, 3600)

2581

>>> rfc3339_duration_to_delta("PT24H")

2582

datetime.timedelta(1)

2583

>>> rfc3339_duration_to_delta("P1W")

2584

datetime.timedelta(7)

2585

>>> rfc3339_duration_to_delta("PT5M30S")

2586

datetime.timedelta(0, 330)

2587

>>> rfc3339_duration_to_delta("P1DT3M20S")

2588

datetime.timedelta(1, 200)

2589

"""

2590

2591

# Parsing an RFC 3339 duration with regular expressions is not

2592

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

2593

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

2594

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

2595

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

2596

# avoid excessive use of external libraries.

2597

2598

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

2599

Token = collections.namedtuple("Token", (

2600

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

2601

# a "group" containing digits

2602

"value", # datetime.timedelta or None

2603

"followers")) # Tokens valid after this token

2604

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

2605

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

2606

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

2607

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

2608

datetime.timedelta(seconds=1),

2609

frozenset((token_end, )))

2610

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

2611

datetime.timedelta(minutes=1),

2612

frozenset((token_second, token_end)))

2613

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

2614

datetime.timedelta(hours=1),

2615

frozenset((token_minute, token_end)))

2616

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

2617

None,

2618

frozenset((token_hour, token_minute,

2619

token_second)))

2620

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

2621

datetime.timedelta(days=1),

2622

frozenset((token_time, token_end)))

2623

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

2624

datetime.timedelta(weeks=4),

2625

frozenset((token_day, token_end)))

2626

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

2627

datetime.timedelta(weeks=52),

2628

frozenset((token_month, token_end)))

2629

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

2630

datetime.timedelta(weeks=1),

2631

frozenset((token_end, )))

2632

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

2633

frozenset((token_year, token_month,

2634

token_day, token_time,

2635

token_week)))

2636

# Define starting values

2637

value = datetime.timedelta() # Value so far

2638

found_token = None

2639

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

2640

s = duration # String left to parse

2641

# Loop until end token is found

2642

while found_token is not token_end:

2643

# Search for any currently valid tokens

2644

for token in followers:

2645

match = token.regexp.match(s)

2646

if match is not None:

2647

# Token found

2648

if token.value is not None:

2649

# Value found, parse digits

2650

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

2651

# Add to value so far

2652

value += factor * token.value

2653

# Strip token from string

2654

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

2655

# Go to found token

2656

found_token = token

2657

# Set valid next tokens

2658

followers = found_token.followers

2659

break

2660

else:

2661

# No currently valid tokens were found

2662

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

2663

.format(duration))

2664

# End token found

2665

return value

2666

2667

1882

2668

def string_to_delta(interval):

1883

2669

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

1884

2670

1895

2681

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

1896

2682

datetime.timedelta(0, 330)

1897

2683

"""

2684

2685

try:

2686

return rfc3339_duration_to_delta(interval)

2687

except ValueError:

2688

pass

2689

1898

2690

timevalue = datetime.timedelta(0)

1899

2691

for s in interval.split():

1900

2692

try:

1901

suffix = unicode(s[-1])

2693

suffix = s[-1]

1902

2694

value = int(s[:-1])

1903

2695

if suffix == "d":

1904

2696

delta = datetime.timedelta(value)

1911

2703

elif suffix == "w":

1912

2704

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

1913

2705

else:

1914

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

1915

except (ValueError, IndexError) as e:

2706

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

2707

except IndexError as e:

1916

2708

raise ValueError(*(e.args))

1917

2709

timevalue += delta

1918

2710

return timevalue

1931

2723

sys.exit()

1932

2724

if not noclose:

1933

2725

# Close all standard open file descriptors

1934

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

2726

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

1935

2727

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

1936

2728

raise OSError(errno.ENODEV,

1937

"%s not a character device"

1938

% os.path.devnull)

2729

"{} not a character device"

2730

.format(os.devnull))

1939

2731

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

1940

2732

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

1941

2733

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

1950

2742

1951

2743

parser = argparse.ArgumentParser()

1952

2744

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

1953

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

2745

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

1954

2746

help="show version number and exit")

1955

2747

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

1956

2748

help="Bind to interface IF")

1962

2754

help="Run self-test")

1963

2755

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

1964

2756

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

1965

" to terminal")

2757

" to terminal", default=None)

1966

2758

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

1967

2759

help="Debug level for stdout output")

1968

2760

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

1975

2767

" files")

1976

2768

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

1977

2769

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

1978

" system bus interface")

2770

" system bus interface", default=None)

1979

2771

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

1980

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

2772

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

2773

default=None)

1981

2774

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

1982

2775

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

1983

" state")

2776

" state", default=None)

2777

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

2778

help="Specify a file descriptor to a network"

2779

" socket to use instead of creating one")

1984

2780

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

1985

2781

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

2782

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

2783

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

2784

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

2785

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

2786

default=None)

1986

2787

1987

2788

options = parser.parse_args()

1988

2789

1989

2790

if options.check:

1990

2791

import doctest

1991

doctest.testmod()

1992

sys.exit()

2792

fail_count, test_count = doctest.testmod()

2793

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

1993

2794

1994

2795

# Default values for config file for server-global settings

1995

2796

server_defaults = { "interface": "",

1997

2798

"port": "",

1998

2799

"debug": "False",

1999

2800

"priority":

2000

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

2801

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

2802

":+SIGN-DSA-SHA256",

2001

2803

"servicename": "Mandos",

2002

2804

"use_dbus": "True",

2003

2805

"use_ipv6": "True",

2004

2806

"debuglevel": "",

2005

2807

"restore": "True",

2006

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

2007

}

2808

"socket": "",

2809

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

2810

"foreground": "False",

2811

"zeroconf": "True",

2812

}

2008

2813

2009

2814

# Parse config file for server-global settings

2010

2815

server_config = configparser.SafeConfigParser(server_defaults)

2011

2816

del server_defaults

2012

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

2013

"mandos.conf"))

2817

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

2014

2818

# Convert the SafeConfigParser object to a dict

2015

2819

server_settings = server_config.defaults()

2016

2820

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

2017

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

2821

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

2018

2822

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

2019

2823

option)

2020

2824

if server_settings["port"]:

2021

2825

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

2022

2826

"port")

2827

if server_settings["socket"]:

2828

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

2829

"socket")

2830

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

2831

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

2832

# happen with a supplied network socket.

2833

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

2834

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

2835

["socket"])

2023

2836

del server_config

2024

2837

2025

2838

# Override the settings from the config file with command line

2026

2839

# options, if set.

2027

2840

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

2028

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

2029

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

2030

"statedir"):

2841

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

2842

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

2843

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

2031

2844

value = getattr(options, option)

2032

2845

if value is not None:

2033

2846

server_settings[option] = value

2034

2847

del options

2035

2848

# Force all strings to be unicode

2036

2849

for option in server_settings.keys():

2037

if type(server_settings[option]) is str:

2038

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

2850

if isinstance(server_settings[option], bytes):

2851

server_settings[option] = (server_settings[option]

2852

.decode("utf-8"))

2853

# Force all boolean options to be boolean

2854

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

2855

"foreground", "zeroconf"):

2856

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

2857

# Debug implies foreground

2858

if server_settings["debug"]:

2859

server_settings["foreground"] = True

2039

2860

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

2040

2861

2041

2862

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

2042

2863

2864

if (not server_settings["zeroconf"]

2865

and not (server_settings["port"]

2866

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

2867

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

2868

2043

2869

# For convenience

2044

2870

debug = server_settings["debug"]

2045

2871

debuglevel = server_settings["debuglevel"]

2047

2873

use_ipv6 = server_settings["use_ipv6"]

2048

2874

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

2049

2875

stored_state_file)

2876

foreground = server_settings["foreground"]

2877

zeroconf = server_settings["zeroconf"]

2050

2878

2051

2879

if debug:

2052

initlogger(logging.DEBUG)

2880

initlogger(debug, logging.DEBUG)

2053

2881

else:

2054

2882

if not debuglevel:

2055

initlogger()

2883

initlogger(debug)

2056

2884

else:

2057

2885

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

2058

initlogger(level)

2886

initlogger(debug, level)

2059

2887

2060

2888

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

2061

syslogger.setFormatter(logging.Formatter

2062

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

2063

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

2064

% server_settings["servicename"]))

2889

syslogger.setFormatter(

2890

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

2891

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

2892

server_settings["servicename"])))

2065

2893

2066

2894

# Parse config file with clients

2067

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

2068

"extended_timeout": "15m",

2069

"interval": "2m",

2070

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

2071

"host": "",

2072

"approval_delay": "0s",

2073

"approval_duration": "1s",

2074

}

2075

client_config = configparser.SafeConfigParser(client_defaults)

2895

client_config = configparser.SafeConfigParser(Client

2896

.client_defaults)

2076

2897

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

2077

2898

"clients.conf"))

2078

2899

2079

2900

global mandos_dbus_service

2080

2901

mandos_dbus_service = None

2081

2902

2082

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

2083

server_settings["port"]),

2084

ClientHandler,

2085

interface=(server_settings["interface"]

2086

or None),

2087

use_ipv6=use_ipv6,

2088

gnutls_priority=

2089

server_settings["priority"],

2090

use_dbus=use_dbus)

2091

if not debug:

2092

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

2903

socketfd = None

2904

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

2905

socketfd = server_settings["socket"]

2906

tcp_server = MandosServer(

2907

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

2908

ClientHandler,

2909

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

2910

use_ipv6=use_ipv6,

2911

gnutls_priority=server_settings["priority"],

2912

use_dbus=use_dbus,

2913

socketfd=socketfd)

2914

if not foreground:

2915

pidfilename = "/run/mandos.pid"

2916

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

2917

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

2918

pidfile = None

2093

2919

try:

2094

pidfile = open(pidfilename, "w")

2095

except IOError:

2096

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

2920

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

2921

except IOError as e:

2922

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

2923

exc_info=e)

2097

2924

2098

try:

2099

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

2100

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

2101

except KeyError:

2925

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

2102

2926

try:

2103

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

2104

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

2927

uid = pwd.getpwnam(name).pw_uid

2928

gid = pwd.getpwnam(name).pw_gid

2929

break

2105

2930

except KeyError:

2106

try:

2107

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

2108

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

2109

except KeyError:

2110

uid = 65534

2111

gid = 65534

2931

continue

2932

else:

2933

uid = 65534

2934

gid = 65534

2112

2935

try:

2113

2936

os.setgid(gid)

2114

2937

os.setuid(uid)

2115

2938

except OSError as error:

2116

if error[0] != errno.EPERM:

2117

raise error

2939

if error.errno != errno.EPERM:

2940

raise

2118

2941

2119

2942

if debug:

2120

2943

# Enable all possible GnuTLS debugging

2121

2944

2122

2945

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

2123

2946

# - GnuTLS manual

2124

gnutls.library.functions.gnutls_global_set_log_level(11)

2947

gnutls.global_set_log_level(11)

2125

2948

2126

@gnutls.library.types.gnutls_log_func

2949

@gnutls.log_func

2127

2950

def debug_gnutls(level, string):

2128

2951

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

2129

2952

2130

(gnutls.library.functions

2131

.gnutls_global_set_log_function(debug_gnutls))

2953

gnutls.global_set_log_function(debug_gnutls)

2132

2954

2133

2955

# Redirect stdin so all checkers get /dev/null

2134

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

2956

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

2135

2957

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

2136

2958

if null > 2:

2137

2959

os.close(null)

2138

else:

2139

# No console logging

2140

logger.removeHandler(console)

2141

2960

2142

2961

# Need to fork before connecting to D-Bus

2143

if not debug:

2962

if not foreground:

2144

2963

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

2145

2964

daemon()

2146

2965

2966

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

2967

# need to inform gobject that threads will be used.

2968

gobject.threads_init()

2969

2147

2970

global main_loop

2148

2971

# From the Avahi example code

2149

DBusGMainLoop(set_as_default=True )

2972

DBusGMainLoop(set_as_default=True)

2150

2973

main_loop = gobject.MainLoop()

2151

2974

bus = dbus.SystemBus()

2152

2975

# End of Avahi example code

2153

2976

if use_dbus:

2154

2977

try:

2155

2978

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

2156

bus, do_not_queue=True)

2157

old_bus_name = (dbus.service.BusName

2158

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

2159

do_not_queue=True))

2160

except dbus.exceptions.NameExistsException as e:

2161

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

2979

bus,

2980

do_not_queue=True)

2981

old_bus_name = dbus.service.BusName(

2982

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

2983

do_not_queue=True)

2984

except dbus.exceptions.DBusException as e:

2985

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

2162

2986

use_dbus = False

2163

2987

server_settings["use_dbus"] = False

2164

2988

tcp_server.use_dbus = False

2165

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2166

service = AvahiServiceToSyslog(name =

2167

server_settings["servicename"],

2168

servicetype = "_mandos._tcp",

2169

protocol = protocol, bus = bus)

2170

if server_settings["interface"]:

2171

service.interface = (if_nametoindex

2172

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

2989

if zeroconf:

2990

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2991

service = AvahiServiceToSyslog(

2992

name = server_settings["servicename"],

2993

servicetype = "_mandos._tcp",

2994

protocol = protocol,

2995

bus = bus)

2996

if server_settings["interface"]:

2997

service.interface = if_nametoindex(

2998

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

2173

2999

2174

3000

global multiprocessing_manager

2175

3001

multiprocessing_manager = multiprocessing.Manager()

2176

3002

2177

3003

client_class = Client

2178

3004

if use_dbus:

2179

client_class = functools.partial(ClientDBusTransitional,

2180

bus = bus)

2181

2182

special_settings = {

2183

# Some settings need to be accessd by special methods;

2184

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

2185

"approved_by_default":

2186

lambda section:

2187

client_config.getboolean(section, "approved_by_default"),

2188

"enabled":

2189

lambda section:

2190

client_config.getboolean(section, "enabled"),

2191

}

2192

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

2193

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

2194

# with exceptions for any special settings as defined above

2195

client_settings = dict((clientname,

2196

dict((setting,

2197

(value

2198

if setting not in special_settings

2199

else special_settings[setting]

2200

(clientname)))

2201

for setting, value in

2202

client_config.items(clientname)))

2203

for clientname in client_config.sections())

2204

3005

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

3006

3007

client_settings = Client.config_parser(client_config)

2205

3008

old_client_settings = {}

2206

clients_data = []

3009

clients_data = {}

3010

3011

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

3012

global wnull

3013

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

3014

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

3015

# mode

3016

if debug or not foreground:

3017

wnull.close()

2207

3018

2208

3019

# Get client data and settings from last running state.

2209

3020

if server_settings["restore"]:

2210

3021

try:

2211

3022

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

2212

clients_data, old_client_settings = (pickle.load

2213

(stored_state))

3023

clients_data, old_client_settings = pickle.load(

3024

stored_state)

2214

3025

os.remove(stored_state_path)

2215

3026

except IOError as e:

2216

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

2217

.format(e))

2218

if e.errno != errno.ENOENT:

3027

if e.errno == errno.ENOENT:

3028

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

3029

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

3030

else:

3031

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

3032

exc_info=e)

2219

3033

raise

3034

except EOFError as e:

3035

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

3036

"EOFError:",

3037

exc_info=e)

2220

3038

2221

3039

with PGPEngine() as pgp:

2222

for client in clients_data:

2223

client_name = client["name"]

3040

for client_name, client in clients_data.items():

3041

# Skip removed clients

3042

if client_name not in client_settings:

3043

continue

2224

3044

2225

3045

# Decide which value to use after restoring saved state.

2226

3046

# We have three different values: Old config file,

2232

3052

# For each value in new config, check if it

2233

3053

# differs from the old config value (Except for

2234

3054

# the "secret" attribute)

2235

if (name != "secret" and

2236

value != old_client_settings[client_name]

2237

[name]):

2238

setattr(client, name, value)

3055

if (name != "secret"

3056

and (value !=

3057

old_client_settings[client_name][name])):

3058

client[name] = value

2239

3059

except KeyError:

2240

3060

pass

2241

3061

2242

3062

# Clients who has passed its expire date can still be

2243

# enabled if its last checker was sucessful. Clients

2244

# whose checker failed before we stored its state is

2245

# assumed to have failed all checkers during downtime.

2246

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

2247

if ((datetime.datetime.utcnow()

2248

- client["last_checked_ok"])

2249

> client["interval"]):

2250

if client["last_checker_status"] != 0:

3063

# enabled if its last checker was successful. A Client

3064

# whose checker succeeded before we stored its state is

3065

# assumed to have successfully run all checkers during

3066

# downtime.

3067

if client["enabled"]:

3068

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

3069

if not client["last_checked_ok"]:

3070

logger.warning(

3071

"disabling client {} - Client never "

3072

"performed a successful checker".format(

3073

client_name))

3074

client["enabled"] = False

3075

elif client["last_checker_status"] != 0:

3076

logger.warning(

3077

"disabling client {} - Client last"

3078

" checker failed with error code"

3079

" {}".format(

3080

client_name,

3081

client["last_checker_status"]))

2251

3082

client["enabled"] = False

2252

3083

else:

2253

client["expires"] = (datetime.datetime

2254

.utcnow()

2255

+ client["timeout"])

2256

2257

client["changedstate"] = (multiprocessing_manager

2258

.Condition

2259

(multiprocessing_manager

2260

.Lock()))

2261

if use_dbus:

2262

new_client = (ClientDBusTransitional.__new__

2263

(ClientDBusTransitional))

2264

tcp_server.clients[client_name] = new_client

2265

new_client.bus = bus

2266

for name, value in client.iteritems():

2267

setattr(new_client, name, value)

2268

client_object_name = unicode(client_name).translate(

2269

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

2270

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

2271

new_client.dbus_object_path = (dbus.ObjectPath

2272

("/clients/"

2273

+ client_object_name))

2274

DBusObjectWithProperties.__init__(new_client,

2275

new_client.bus,

2276

new_client

2277

.dbus_object_path)

2278

else:

2279

tcp_server.clients[client_name] = (Client.__new__

2280

(Client))

2281

for name, value in client.iteritems():

2282

setattr(tcp_server.clients[client_name],

2283

name, value)

2284

3084

client["expires"] = (

3085

datetime.datetime.utcnow()

3086

+ client["timeout"])

3087

logger.debug("Last checker succeeded,"

3088

" keeping {} enabled".format(

3089

client_name))

2285

3090

try:

2286

tcp_server.clients[client_name].secret = (

2287

pgp.decrypt(tcp_server.clients[client_name]

2288

.encrypted_secret,

2289

client_settings[client_name]

2290

["secret"]))

3091

client["secret"] = pgp.decrypt(

3092

client["encrypted_secret"],

3093

client_settings[client_name]["secret"])

2291

3094

except PGPError:

2292

3095

# If decryption fails, we use secret from new settings

2293

tcp_server.clients[client_name].secret = (

2294

client_settings[client_name]["secret"])

2295

2296

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

2297

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

2298

del tcp_server.clients[clientname]

2299

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

2300

tcp_server.clients[clientname] = (client_class(name

2301

= clientname,

2302

config =

2303

client_settings

2304

[clientname]))

3096

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

3097

client_name))

3098

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

3099

["secret"])

3100

3101

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

3102

for client_name in (set(old_client_settings)

3103

- set(client_settings)):

3104

del clients_data[client_name]

3105

for client_name in (set(client_settings)

3106

- set(old_client_settings)):

3107

clients_data[client_name] = client_settings[client_name]

3108

3109

# Create all client objects

3110

for client_name, client in clients_data.items():

3111

tcp_server.clients[client_name] = client_class(

3112

name = client_name,

3113

settings = client,

3114

server_settings = server_settings)

2305

3115

2306

3116

if not tcp_server.clients:

2307

3117

logger.warning("No clients defined")

2308

2309

if not debug:

2310

try:

2311

with pidfile:

2312

pid = os.getpid()

2313

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

2314

del pidfile

2315

except IOError:

2316

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

2317

pidfilename, pid)

2318

except NameError:

2319

# "pidfile" was never created

2320

pass

3118

3119

if not foreground:

3120

if pidfile is not None:

3121

pid = os.getpid()

3122

try:

3123

with pidfile:

3124

print(pid, file=pidfile)

3125

except IOError:

3126

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

3127

pidfilename, pid)

3128

del pidfile

2321

3129

del pidfilename

2322

2323

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

2324

3130

2325

3131

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

2326

3132

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

2327

3133

2328

3134

if use_dbus:

2329

class MandosDBusService(dbus.service.Object):

3135

3136

@alternate_dbus_interfaces(

3137

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

3138

class MandosDBusService(DBusObjectWithObjectManager):

2330

3139

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

3140

2331

3141

def __init__(self):

2332

3142

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

3143

2333

3144

_interface = "se.recompile.Mandos"

2334

3145

2335

3146

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

2342

3153

"D-Bus signal"

2343

3154

pass

2344

3155

3156

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

3157

"true"})

2345

3158

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

2346

3159

def ClientRemoved(self, objpath, name):

2347

3160

"D-Bus signal"

2348

3161

pass

2349

3162

3163

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

3164

"true"})

2350

3165

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

2351

3166

def GetAllClients(self):

2352

3167

"D-Bus method"

2353

return dbus.Array(c.dbus_object_path

2354

for c in

3168

return dbus.Array(c.dbus_object_path for c in

2355

3169

tcp_server.clients.itervalues())

2356

3170

3171

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

3172

"true"})

2357

3173

@dbus.service.method(_interface,

2358

3174

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

2359

3175

def GetAllClientsWithProperties(self):

2360

3176

"D-Bus method"

2361

3177

return dbus.Dictionary(

2362

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

2363

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

3178

{ c.dbus_object_path: c.GetAll(

3179

"se.recompile.Mandos.Client")

3180

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

2364

3181

signature="oa{sv}")

2365

3182

2366

3183

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

2370

3187

if c.dbus_object_path == object_path:

2371

3188

del tcp_server.clients[c.name]

2372

3189

c.remove_from_connection()

2373

# Don't signal anything except ClientRemoved

3190

# Don't signal the disabling

2374

3191

c.disable(quiet=True)

2375

# Emit D-Bus signal

2376

self.ClientRemoved(object_path, c.name)

3192

# Emit D-Bus signal for removal

3193

self.client_removed_signal(c)

2377

3194

return

2378

3195

raise KeyError(object_path)

2379

3196

2380

3197

del _interface

3198

3199

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3200

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

3201

def GetManagedObjects(self):

3202

"""D-Bus method"""

3203

return dbus.Dictionary(

3204

{ client.dbus_object_path:

3205

dbus.Dictionary(

3206

{ interface: client.GetAll(interface)

3207

for interface in

3208

client._get_all_interface_names()})

3209

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

3210

3211

def client_added_signal(self, client):

3212

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

3213

if use_dbus:

3214

# New standard signal

3215

self.InterfacesAdded(

3216

client.dbus_object_path,

3217

dbus.Dictionary(

3218

{ interface: client.GetAll(interface)

3219

for interface in

3220

client._get_all_interface_names()}))

3221

# Old signal

3222

self.ClientAdded(client.dbus_object_path)

3223

3224

def client_removed_signal(self, client):

3225

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

3226

if use_dbus:

3227

# New standard signal

3228

self.InterfacesRemoved(

3229

client.dbus_object_path,

3230

client._get_all_interface_names())

3231

# Old signal

3232

self.ClientRemoved(client.dbus_object_path,

3233

client.name)

2381

3234

2382

class MandosDBusServiceTransitional(MandosDBusService):

2383

__metaclass__ = AlternateDBusNamesMetaclass

2384

mandos_dbus_service = MandosDBusServiceTransitional()

3235

mandos_dbus_service = MandosDBusService()

2385

3236

2386

3237

def cleanup():

2387

3238

"Cleanup function; run on exit"

2388

service.cleanup()

3239

if zeroconf:

3240

service.cleanup()

2389

3241

2390

3242

multiprocessing.active_children()

3243

wnull.close()

2391

3244

if not (tcp_server.clients or client_settings):

2392

3245

return

2393

3246

2394

3247

# Store client before exiting. Secrets are encrypted with key

2395

3248

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

2396

3249

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

2397

clients = []

3250

clients = {}

2398

3251

with PGPEngine() as pgp:

2399

3252

for client in tcp_server.clients.itervalues():

2400

3253

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

2402

3255

key)

2403

3256

client_dict = {}

2404

3257

2405

# A list of attributes that will not be stored when

2406

# shutting down.

2407

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

2408

for name, typ in (inspect.getmembers

2409

(dbus.service.Object)):

3258

# A list of attributes that can not be pickled

3259

# + secret.

3260

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

3261

"checker", "server_settings" }

3262

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

3263

.Object):

2410

3264

exclude.add(name)

2411

3265

2412

3266

client_dict["encrypted_secret"] = (client

2415

3269

if attr not in exclude:

2416

3270

client_dict[attr] = getattr(client, attr)

2417

3271

2418

clients.append(client_dict)

3272

clients[client.name] = client_dict

2419

3273

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

2420

3274

2421

3275

try:

2422

with os.fdopen(os.open(stored_state_path,

2423

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

2424

0600), "wb") as stored_state:

3276

with tempfile.NamedTemporaryFile(

3277

mode='wb',

3278

suffix=".pickle",

3279

prefix='clients-',

3280

dir=os.path.dirname(stored_state_path),

3281

delete=False) as stored_state:

2425

3282

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

3283

tempname = stored_state.name

3284

os.rename(tempname, stored_state_path)

2426

3285

except (IOError, OSError) as e:

2427

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

2428

.format(e))

2429

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

3286

if not debug:

3287

try:

3288

os.remove(tempname)

3289

except NameError:

3290

pass

3291

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

3292

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

3293

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

3294

else:

3295

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

3296

exc_info=e)

2430

3297

raise

2431

3298

2432

3299

# Delete all clients, and settings from config

2434

3301

name, client = tcp_server.clients.popitem()

2435

3302

if use_dbus:

2436

3303

client.remove_from_connection()

2437

# Don't signal anything except ClientRemoved

3304

# Don't signal the disabling

2438

3305

client.disable(quiet=True)

3306

# Emit D-Bus signal for removal

2439

3307

if use_dbus:

2440

# Emit D-Bus signal

2441

mandos_dbus_service.ClientRemoved(client

2442

.dbus_object_path,

2443

client.name)

3308

mandos_dbus_service.client_removed_signal(client)

2444

3309

client_settings.clear()

2445

3310

2446

3311

atexit.register(cleanup)

2447

3312

2448

3313

for client in tcp_server.clients.itervalues():

2449

3314

if use_dbus:

2450

# Emit D-Bus signal

2451

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3315

# Emit D-Bus signal for adding

3316

mandos_dbus_service.client_added_signal(client)

2452

3317

# Need to initiate checking of clients

2453

3318

if client.enabled:

2454

3319

client.init_checker()

2457

3322

tcp_server.server_activate()

2458

3323

2459

3324

# Find out what port we got

2460

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

3325

if zeroconf:

3326

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

2461

3327

if use_ipv6:

2462

3328

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

2463

" flowinfo %d, scope_id %d"

2464

% tcp_server.socket.getsockname())

3329

" flowinfo %d, scope_id %d",

3330

*tcp_server.socket.getsockname())

2465

3331

else: # IPv4

2466

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

2467

% tcp_server.socket.getsockname())

3332

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

3333

*tcp_server.socket.getsockname())

2468

3334

2469

3335

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

2470

3336

2471

3337

try:

2472

# From the Avahi example code

2473

try:

2474

service.activate()

2475

except dbus.exceptions.DBusException as error:

2476

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

2477

cleanup()

2478

sys.exit(1)

2479

# End of Avahi example code

3338

if zeroconf:

3339

# From the Avahi example code

3340

try:

3341

service.activate()

3342

except dbus.exceptions.DBusException as error:

3343

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

3344

cleanup()

3345

sys.exit(1)

3346

# End of Avahi example code

2480

3347

2481

3348

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

2482

3349

lambda *args, **kwargs:

2486

3353

logger.debug("Starting main loop")

2487

3354

main_loop.run()

2488

3355

except AvahiError as error:

2489

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

3356

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

2490

3357

cleanup()

2491

3358

sys.exit(1)

2492

3359

except KeyboardInterrupt: