/mandos/trunk : revision 954

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#!/usr/bin/python

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

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#

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#

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

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#

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#

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# This program is partly derived from an example program for an Avahi

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# service publisher, downloaded from

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# <http://avahi.org/wiki/PythonPublishExample>. This includes the

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# methods "add", "remove", "server_state_changed",

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# "entry_group_state_changed", "cleanup", and "activate" in the

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

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#

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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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#

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# This file is part of Mandos.

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#

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

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

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# the Free Software Foundation, either version 3 of the License, or

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# (at your option) any later version.

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#

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# This program is distributed in the hope that it will be useful,

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# but WITHOUT ANY WARRANTY; without even the implied warranty of

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# Mandos is distributed in the hope that it will be useful, but

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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# You should have received a copy of the GNU General Public License

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# along with this program. If not, see

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# <http://www.gnu.org/licenses/>.

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#

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# along with Mandos. If not, see <http://www.gnu.org/licenses/>.

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#

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# Contact the authors at <mandos@recompile.se>.

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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import SocketServer as socketserver

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try:

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from future_builtins import *

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except ImportError:

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pass

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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import avahi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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# Try to find the value of SO_BINDTODEVICE:

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try:

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# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and

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# newer, and it is also the most natural place for it:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.5.3"

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# In Python 2.7 it seems to have been removed entirely.

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# Try running the C preprocessor:

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try:

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cc = subprocess.Popen(["cc", "--language=c", "-E",

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]

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SO_BINDTODEVICE = int(stdout.splitlines()[-1])

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.19"

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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 copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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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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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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'--no-use-agent'])

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet']

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# Only GPG version 1 has the --no-use-agent option.

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if self.gpg == "gpg" or self.gpg.endswith("/gpg"):

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self.gnupgargs.append("--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 __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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for root, dirs, files in os.walk(self.tempdir,

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topdown = False):

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topdown=False):

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for filename in files:

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os.remove(os.path.join(root, filename))

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for dirname in dirs:

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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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, "w") 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, "w") as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class Avahi(object):

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

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

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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

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

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

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class AvahiError(Exception):

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

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self.value = value

216

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

217

def __unicode__(self):

218

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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class AvahiService(object):

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"""An Avahi (Zeroconf) service.

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Attributes:

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interface: integer; avahi.IF_UNSPEC or an interface index.

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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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"""

247

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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340

def __init__(self,

341

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,

350

bus=None):

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self.interface = interface

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352

self.name = name

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353

self.type = servicetype

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362

self.server = None

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363

self.bus = bus

264

364

self.entry_group_state_changed_match = None

265

def rename(self):

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366

def rename(self, remove=True):

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

267

368

if self.rename_count >= self.max_renames:

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369

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

269

370

" after %i retries, exiting.",

270

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self.rename_count)

271

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raise AvahiServiceError("Too many renames")

272

self.name = unicode(self.server

273

.GetAlternativeServiceName(self.name))

373

self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

274

376

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

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377

self.name)

276

self.remove()

378

if remove:

379

self.remove()

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380

try:

278

381

self.add()

279

382

except dbus.exceptions.DBusException as error:

280

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

281

self.cleanup()

282

os._exit(1)

283

self.rename_count += 1

383

if (error.get_dbus_name()

384

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

385

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

386

return self.rename(remove=False)

387

else:

388

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

389

self.cleanup()

390

os._exit(1)

391

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def remove(self):

285

393

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

286

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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397

if self.group is not None:

290

398

self.group.Reset()

399

291

400

def add(self):

292

401

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

293

402

self.remove()

310

419

dbus.UInt16(self.port),

311

420

avahi.string_array_to_txt_array(self.TXT))

312

421

self.group.Commit()

422

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423

def entry_group_state_changed(self, state, error):

314

424

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

315

425

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

316

426

317

427

if state == avahi.ENTRY_GROUP_ESTABLISHED:

318

428

logger.debug("Zeroconf service established.")

319

429

elif state == avahi.ENTRY_GROUP_COLLISION:

321

431

self.rename()

322

432

elif state == avahi.ENTRY_GROUP_FAILURE:

323

433

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

324

unicode(error))

325

raise AvahiGroupError("State changed: {0!s}"

326

.format(error))

434

str(error))

435

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

436

327

437

def cleanup(self):

328

438

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

329

439

if self.group is not None:

334

444

pass

335

445

self.group = None

336

446

self.remove()

447

337

448

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

338

449

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

339

450

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

340

bad_states = { avahi.SERVER_INVALID:

341

"Zeroconf server invalid",

342

avahi.SERVER_REGISTERING: None,

343

avahi.SERVER_COLLISION:

344

"Zeroconf server name collision",

345

avahi.SERVER_FAILURE:

346

"Zeroconf server failure" }

451

bad_states = {

452

avahi.SERVER_INVALID: "Zeroconf server invalid",

453

avahi.SERVER_REGISTERING: None,

454

avahi.SERVER_COLLISION: "Zeroconf server name collision",

455

avahi.SERVER_FAILURE: "Zeroconf server failure",

456

}

347

457

if state in bad_states:

348

458

if bad_states[state] is not None:

349

459

if error is None:

352

462

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

353

463

self.cleanup()

354

464

elif state == avahi.SERVER_RUNNING:

355

self.add()

465

try:

466

self.add()

467

except dbus.exceptions.DBusException as error:

468

if (error.get_dbus_name()

469

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

470

logger.info("Local Zeroconf service name"

471

" collision.")

472

return self.rename(remove=False)

473

else:

474

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

475

self.cleanup()

476

os._exit(1)

356

477

else:

357

478

if error is None:

358

479

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

359

480

else:

360

481

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

482

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483

def activate(self):

362

484

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

363

485

if self.server is None:

367

489

follow_name_owner_changes=True),

368

490

avahi.DBUS_INTERFACE_SERVER)

369

491

self.server.connect_to_signal("StateChanged",

370

self.server_state_changed)

492

self.server_state_changed)

371

493

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

372

494

495

373

496

class AvahiServiceToSyslog(AvahiService):

374

def rename(self):

497

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

375

498

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

376

ret = AvahiService.rename(self)

377

syslogger.setFormatter(logging.Formatter

378

('Mandos ({0}) [%(process)d]:'

379

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

380

.format(self.name)))

499

ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)

500

syslogger.setFormatter(logging.Formatter(

501

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

502

.format(self.name)))

381

503

return ret

382

504

383

def timedelta_to_milliseconds(td):

384

"Convert a datetime.timedelta() to milliseconds"

385

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

386

+ (td.seconds * 1000)

387

+ (td.microseconds // 1000))

388

505

506

# Pretend that we have a GnuTLS module

507

class GnuTLS(object):

508

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

509

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

510

511

library = ctypes.util.find_library("gnutls")

512

if library is None:

513

library = ctypes.util.find_library("gnutls-deb0")

514

_library = ctypes.cdll.LoadLibrary(library)

515

del library

516

_need_version = b"3.3.0"

517

518

def __init__(self):

519

# Need to use "self" here, since this method is called before

520

# the assignment to the "gnutls" global variable happens.

521

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

522

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

523

.format(self._need_version))

524

525

# Unless otherwise indicated, the constants and types below are

526

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

527

528

# Constants

529

E_SUCCESS = 0

530

E_INTERRUPTED = -52

531

E_AGAIN = -28

532

CRT_OPENPGP = 2

533

CLIENT = 2

534

SHUT_RDWR = 0

535

CRD_CERTIFICATE = 1

536

E_NO_CERTIFICATE_FOUND = -49

537

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

538

539

# Types

540

class session_int(ctypes.Structure):

541

_fields_ = []

542

session_t = ctypes.POINTER(session_int)

543

544

class certificate_credentials_st(ctypes.Structure):

545

_fields_ = []

546

certificate_credentials_t = ctypes.POINTER(

547

certificate_credentials_st)

548

certificate_type_t = ctypes.c_int

549

550

class datum_t(ctypes.Structure):

551

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

552

('size', ctypes.c_uint)]

553

554

class openpgp_crt_int(ctypes.Structure):

555

_fields_ = []

556

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

557

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

558

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

559

credentials_type_t = ctypes.c_int

560

transport_ptr_t = ctypes.c_void_p

561

close_request_t = ctypes.c_int

562

563

# Exceptions

564

class Error(Exception):

565

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

566

# exception might be raised from within GnuTLS.__init__,

567

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

568

# global variable has happened.

569

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

570

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

571

# code is passed, convert it to a string with

572

# gnutls.strerror()

573

self.code = code

574

if message is None and code is not None:

575

message = GnuTLS.strerror(code)

576

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

577

message, *args)

578

579

class CertificateSecurityError(Error):

580

pass

581

582

# Classes

583

class Credentials(object):

584

def __init__(self):

585

self._c_object = gnutls.certificate_credentials_t()

586

gnutls.certificate_allocate_credentials(

587

ctypes.byref(self._c_object))

588

self.type = gnutls.CRD_CERTIFICATE

589

590

def __del__(self):

591

gnutls.certificate_free_credentials(self._c_object)

592

593

class ClientSession(object):

594

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

595

self._c_object = gnutls.session_t()

596

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

597

gnutls.set_default_priority(self._c_object)

598

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

599

gnutls.handshake_set_private_extensions(self._c_object,

600

True)

601

self.socket = socket

602

if credentials is None:

603

credentials = gnutls.Credentials()

604

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

605

ctypes.cast(credentials._c_object,

606

ctypes.c_void_p))

607

self.credentials = credentials

608

609

def __del__(self):

610

gnutls.deinit(self._c_object)

611

612

def handshake(self):

613

return gnutls.handshake(self._c_object)

614

615

def send(self, data):

616

data = bytes(data)

617

data_len = len(data)

618

while data_len > 0:

619

data_len -= gnutls.record_send(self._c_object,

620

data[-data_len:],

621

data_len)

622

623

def bye(self):

624

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

625

626

# Error handling functions

627

def _error_code(result):

628

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

629

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

630

if result >= 0:

631

return result

632

if result == gnutls.E_NO_CERTIFICATE_FOUND:

633

raise gnutls.CertificateSecurityError(code=result)

634

raise gnutls.Error(code=result)

635

636

def _retry_on_error(result, func, arguments):

637

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

638

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

639

while result < 0:

640

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

641

return _error_code(result)

642

result = func(*arguments)

643

return result

644

645

# Unless otherwise indicated, the function declarations below are

646

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

647

648

# Functions

649

priority_set_direct = _library.gnutls_priority_set_direct

650

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

651

ctypes.POINTER(ctypes.c_char_p)]

652

priority_set_direct.restype = _error_code

653

654

init = _library.gnutls_init

655

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

656

init.restype = _error_code

657

658

set_default_priority = _library.gnutls_set_default_priority

659

set_default_priority.argtypes = [session_t]

660

set_default_priority.restype = _error_code

661

662

record_send = _library.gnutls_record_send

663

record_send.argtypes = [session_t, ctypes.c_void_p,

664

ctypes.c_size_t]

665

record_send.restype = ctypes.c_ssize_t

666

record_send.errcheck = _retry_on_error

667

668

certificate_allocate_credentials = (

669

_library.gnutls_certificate_allocate_credentials)

670

certificate_allocate_credentials.argtypes = [

671

ctypes.POINTER(certificate_credentials_t)]

672

certificate_allocate_credentials.restype = _error_code

673

674

certificate_free_credentials = (

675

_library.gnutls_certificate_free_credentials)

676

certificate_free_credentials.argtypes = [

677

certificate_credentials_t]

678

certificate_free_credentials.restype = None

679

680

handshake_set_private_extensions = (

681

_library.gnutls_handshake_set_private_extensions)

682

handshake_set_private_extensions.argtypes = [session_t,

683

ctypes.c_int]

684

handshake_set_private_extensions.restype = None

685

686

credentials_set = _library.gnutls_credentials_set

687

credentials_set.argtypes = [session_t, credentials_type_t,

688

ctypes.c_void_p]

689

credentials_set.restype = _error_code

690

691

strerror = _library.gnutls_strerror

692

strerror.argtypes = [ctypes.c_int]

693

strerror.restype = ctypes.c_char_p

694

695

certificate_type_get = _library.gnutls_certificate_type_get

696

certificate_type_get.argtypes = [session_t]

697

certificate_type_get.restype = _error_code

698

699

certificate_get_peers = _library.gnutls_certificate_get_peers

700

certificate_get_peers.argtypes = [session_t,

701

ctypes.POINTER(ctypes.c_uint)]

702

certificate_get_peers.restype = ctypes.POINTER(datum_t)

703

704

global_set_log_level = _library.gnutls_global_set_log_level

705

global_set_log_level.argtypes = [ctypes.c_int]

706

global_set_log_level.restype = None

707

708

global_set_log_function = _library.gnutls_global_set_log_function

709

global_set_log_function.argtypes = [log_func]

710

global_set_log_function.restype = None

711

712

deinit = _library.gnutls_deinit

713

deinit.argtypes = [session_t]

714

deinit.restype = None

715

716

handshake = _library.gnutls_handshake

717

handshake.argtypes = [session_t]

718

handshake.restype = _error_code

719

handshake.errcheck = _retry_on_error

720

721

transport_set_ptr = _library.gnutls_transport_set_ptr

722

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

723

transport_set_ptr.restype = None

724

725

bye = _library.gnutls_bye

726

bye.argtypes = [session_t, close_request_t]

727

bye.restype = _error_code

728

bye.errcheck = _retry_on_error

729

730

check_version = _library.gnutls_check_version

731

check_version.argtypes = [ctypes.c_char_p]

732

check_version.restype = ctypes.c_char_p

733

734

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

735

736

openpgp_crt_init = _library.gnutls_openpgp_crt_init

737

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

738

openpgp_crt_init.restype = _error_code

739

740

openpgp_crt_import = _library.gnutls_openpgp_crt_import

741

openpgp_crt_import.argtypes = [openpgp_crt_t,

742

ctypes.POINTER(datum_t),

743

openpgp_crt_fmt_t]

744

openpgp_crt_import.restype = _error_code

745

746

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

747

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

748

ctypes.POINTER(ctypes.c_uint)]

749

openpgp_crt_verify_self.restype = _error_code

750

751

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

752

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

753

openpgp_crt_deinit.restype = None

754

755

openpgp_crt_get_fingerprint = (

756

_library.gnutls_openpgp_crt_get_fingerprint)

757

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

758

ctypes.c_void_p,

759

ctypes.POINTER(

760

ctypes.c_size_t)]

761

openpgp_crt_get_fingerprint.restype = _error_code

762

763

# Remove non-public functions

764

del _error_code, _retry_on_error

765

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

766

gnutls = GnuTLS()

767

768

769

def call_pipe(connection, # : multiprocessing.Connection

770

func, *args, **kwargs):

771

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

772

773

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

774

return value on the provided multiprocessing.Connection.

775

"""

776

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

777

connection.close()

778

779

389

780

class Client(object):

390

781

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

391

782

392

783

Attributes:

393

784

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

394

785

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

396

787

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

397

788

to see if the client lives.

398

789

'None' if no process is running.

399

checker_callback_tag: a gobject event source tag, or None

790

checker_callback_tag: a GLib event source tag, or None

400

791

checker_command: string; External command which is run to check

401

792

if client lives. %() expansions are done at

402

793

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

403

794

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

404

checker_initiator_tag: a gobject event source tag, or None

795

checker_initiator_tag: a GLib event source tag, or None

405

796

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

406

797

client_structure: Object describing what attributes a client has

407

798

and is used for storing the client at exit

408

799

current_checker_command: string; current running checker_command

409

disable_initiator_tag: a gobject event source tag, or None

800

disable_initiator_tag: a GLib event source tag, or None

410

801

enabled: bool()

411

802

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

412

803

uniquely identify the client

417

808

last_checker_status: integer between 0 and 255 reflecting exit

418

809

status of last checker. -1 reflects crashed

419

810

checker, -2 means no checker completed yet.

811

last_checker_signal: The signal which killed the last checker, if

812

last_checker_status is -1

420

813

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

421

814

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

422

815

D-Bus identifiers

427

820

runtime_expansions: Allowed attributes for runtime expansion.

428

821

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

429

822

disabled, or None

823

server_settings: The server_settings dict from main()

430

824

"""

431

825

432

826

runtime_expansions = ("approval_delay", "approval_duration",

433

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

434

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

827

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

828

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

829

"last_approval_request", "last_checked_ok",

435

830

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

436

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

437

"extended_timeout": "15m",

438

"interval": "2m",

439

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

440

"host": "",

441

"approval_delay": "0s",

442

"approval_duration": "1s",

443

"approved_by_default": "True",

444

"enabled": "True",

445

}

446

447

def timeout_milliseconds(self):

448

"Return the 'timeout' attribute in milliseconds"

449

return timedelta_to_milliseconds(self.timeout)

450

451

def extended_timeout_milliseconds(self):

452

"Return the 'extended_timeout' attribute in milliseconds"

453

return timedelta_to_milliseconds(self.extended_timeout)

454

455

def interval_milliseconds(self):

456

"Return the 'interval' attribute in milliseconds"

457

return timedelta_to_milliseconds(self.interval)

458

459

def approval_delay_milliseconds(self):

460

return timedelta_to_milliseconds(self.approval_delay)

831

client_defaults = {

832

"timeout": "PT5M",

833

"extended_timeout": "PT15M",

834

"interval": "PT2M",

835

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

836

"host": "",

837

"approval_delay": "PT0S",

838

"approval_duration": "PT1S",

839

"approved_by_default": "True",

840

"enabled": "True",

841

}

461

842

462

843

@staticmethod

463

844

def config_parser(config):

471

852

for client_name in config.sections():

472

853

section = dict(config.items(client_name))

473

854

client = settings[client_name] = {}

474

855

475

856

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

476

857

# Reformat values from string types to Python types

477

858

client["approved_by_default"] = config.getboolean(

478

859

client_name, "approved_by_default")

479

860

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

480

861

"enabled")

481

862

863

# Uppercase and remove spaces from fingerprint for later

864

# comparison purposes with return value from the

865

# fingerprint() function

482

866

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

483

867

.replace(" ", ""))

484

868

if "secret" in section:

485

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

869

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

870

.encode("utf-8"),

871

"base64")

486

872

elif "secfile" in section:

487

873

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

488

874

(section["secfile"])),

489

875

"rb") as secfile:

490

876

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

491

877

else:

492

raise TypeError("No secret or secfile for section {0}"

878

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

493

879

.format(section))

494

880

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

495

881

client["extended_timeout"] = string_to_delta(

503

889

client["last_approval_request"] = None

504

890

client["last_checked_ok"] = None

505

891

client["last_checker_status"] = -2

506

892

507

893

return settings

508

509

510

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

511

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

512

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

513

attribute."""

894

895

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

514

896

self.name = name

897

if server_settings is None:

898

server_settings = {}

899

self.server_settings = server_settings

515

900

# adding all client settings

516

for setting, value in settings.iteritems():

901

for setting, value in settings.items():

517

902

setattr(self, setting, value)

518

903

519

904

if self.enabled:

520

905

if not hasattr(self, "last_enabled"):

521

906

self.last_enabled = datetime.datetime.utcnow()

525

910

else:

526

911

self.last_enabled = None

527

912

self.expires = None

528

913

529

914

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

530

# Uppercase and remove spaces from fingerprint for later

531

# comparison purposes with return value from the fingerprint()

532

# function

533

915

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

534

916

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

535

917

datetime.datetime.utcnow())

542

924

self.current_checker_command = None

543

925

self.approved = None

544

926

self.approvals_pending = 0

545

self.changedstate = (multiprocessing_manager

546

.Condition(multiprocessing_manager

547

.Lock()))

548

self.client_structure = [attr for attr in

549

self.__dict__.iterkeys()

927

self.changedstate = multiprocessing_manager.Condition(

928

multiprocessing_manager.Lock())

929

self.client_structure = [attr

930

for attr in self.__dict__.keys()

550

931

if not attr.startswith("_")]

551

932

self.client_structure.append("client_structure")

552

553

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

554

lambda obj:

555

isinstance(obj,

556

property)):

933

934

for name, t in inspect.getmembers(

935

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

557

936

if not name.startswith("_"):

558

937

self.client_structure.append(name)

559

938

560

939

# Send notice to process children that client state has changed

561

940

def send_changedstate(self):

562

941

with self.changedstate:

563

942

self.changedstate.notify_all()

564

943

565

944

def enable(self):

566

945

"""Start this client's checker and timeout hooks"""

567

946

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

568

947

# Already enabled

569

948

return

570

self.send_changedstate()

571

949

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

572

950

self.enabled = True

573

951

self.last_enabled = datetime.datetime.utcnow()

574

952

self.init_checker()

575

953

self.send_changedstate()

954

576

955

def disable(self, quiet=True):

577

956

"""Disable this client."""

578

957

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

579

958

return False

580

959

if not quiet:

581

self.send_changedstate()

582

if not quiet:

583

960

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

584

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

585

gobject.source_remove(self.disable_initiator_tag)

961

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

962

GLib.source_remove(self.disable_initiator_tag)

586

963

self.disable_initiator_tag = None

587

964

self.expires = None

588

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

589

gobject.source_remove(self.checker_initiator_tag)

965

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

966

GLib.source_remove(self.checker_initiator_tag)

590

967

self.checker_initiator_tag = None

591

968

self.stop_checker()

592

969

self.enabled = False

593

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

970

if not quiet:

971

self.send_changedstate()

972

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

594

973

return False

595

974

596

975

def __del__(self):

597

976

self.disable()

598

977

599

978

def init_checker(self):

600

979

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

601

980

# and every interval from then on.

602

self.checker_initiator_tag = (gobject.timeout_add

603

(self.interval_milliseconds(),

604

self.start_checker))

981

if self.checker_initiator_tag is not None:

982

GLib.source_remove(self.checker_initiator_tag)

983

self.checker_initiator_tag = GLib.timeout_add(

984

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

985

self.start_checker)

605

986

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

606

self.disable_initiator_tag = (gobject.timeout_add

607

(self.timeout_milliseconds(),

608

self.disable))

987

if self.disable_initiator_tag is not None:

988

GLib.source_remove(self.disable_initiator_tag)

989

self.disable_initiator_tag = GLib.timeout_add(

990

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

609

991

# Also start a new checker *right now*.

610

992

self.start_checker()

611

612

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

993

994

def checker_callback(self, source, condition, connection,

995

command):

613

996

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

614

997

self.checker_callback_tag = None

615

998

self.checker = None

616

if os.WIFEXITED(condition):

617

self.last_checker_status = os.WEXITSTATUS(condition)

999

# Read return code from connection (see call_pipe)

1000

returncode = connection.recv()

1001

connection.close()

1002

1003

if returncode >= 0:

1004

self.last_checker_status = returncode

1005

self.last_checker_signal = None

618

1006

if self.last_checker_status == 0:

619

1007

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

620

1008

vars(self))

621

1009

self.checked_ok()

622

1010

else:

623

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

624

vars(self))

1011

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

625

1012

else:

626

1013

self.last_checker_status = -1

1014

self.last_checker_signal = -returncode

627

1015

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

628

1016

vars(self))

629

1017

return False

1018

630

1019

def checked_ok(self):

631

1020

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

632

1021

self.last_checked_ok = datetime.datetime.utcnow()

633

1022

self.last_checker_status = 0

1023

self.last_checker_signal = None

634

1024

self.bump_timeout()

635

1025

636

1026

def bump_timeout(self, timeout=None):

637

1027

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

638

1028

if timeout is None:

639

1029

timeout = self.timeout

640

1030

if self.disable_initiator_tag is not None:

641

gobject.source_remove(self.disable_initiator_tag)

1031

GLib.source_remove(self.disable_initiator_tag)

1032

self.disable_initiator_tag = None

642

1033

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

643

self.disable_initiator_tag = (gobject.timeout_add

644

(timedelta_to_milliseconds

645

(timeout), self.disable))

1034

self.disable_initiator_tag = GLib.timeout_add(

1035

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

646

1036

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

647

1037

648

1038

def need_approval(self):

649

1039

self.last_approval_request = datetime.datetime.utcnow()

650

1040

651

1041

def start_checker(self):

652

1042

"""Start a new checker subprocess if one is not running.

653

1043

654

1044

If a checker already exists, leave it running and do

655

1045

nothing."""

656

1046

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

657

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

658

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

659

# client would inevitably timeout, since no checker would get

660

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

1047

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

1048

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

1049

# would inevitably timeout, since no checker would get a

1050

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

661

1051

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

662

1052

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

663

1053

# should be.

664

665

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

666

try:

667

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

668

except (AttributeError, OSError) as error:

669

if (isinstance(error, OSError)

670

and error.errno != errno.ECHILD):

671

raise error

672

else:

673

if pid:

674

logger.warning("Checker was a zombie")

675

gobject.source_remove(self.checker_callback_tag)

676

self.checker_callback(pid, status,

677

self.current_checker_command)

1054

1055

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

1056

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

1057

self.checker.join()

1058

self.checker = None

678

1059

# Start a new checker if needed

679

1060

if self.checker is None:

1061

# Escape attributes for the shell

1062

escaped_attrs = {

1063

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

1064

for attr in self.runtime_expansions}

680

1065

try:

681

# In case checker_command has exactly one % operator

682

command = self.checker_command % self.host

683

except TypeError:

684

# Escape attributes for the shell

685

escaped_attrs = dict(

686

(attr,

687

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

688

errors=

689

'replace')))

690

for attr in

691

self.runtime_expansions)

692

693

try:

694

command = self.checker_command % escaped_attrs

695

except TypeError as error:

696

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

697

self.checker_command, exc_info=error)

698

return True # Try again later

1066

command = self.checker_command % escaped_attrs

1067

except TypeError as error:

1068

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

1069

self.checker_command,

1070

exc_info=error)

1071

return True # Try again later

699

1072

self.current_checker_command = command

700

try:

701

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

702

command, self.name)

703

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

704

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

705

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

706

# always replaced by /dev/null.)

707

self.checker = subprocess.Popen(command,

708

close_fds=True,

709

shell=True, cwd="/")

710

self.checker_callback_tag = (gobject.child_watch_add

711

(self.checker.pid,

712

self.checker_callback,

713

data=command))

714

# The checker may have completed before the gobject

715

# watch was added. Check for this.

716

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

717

if pid:

718

gobject.source_remove(self.checker_callback_tag)

719

self.checker_callback(pid, status, command)

720

except OSError as error:

721

logger.error("Failed to start subprocess",

722

exc_info=error)

723

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

1073

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

1074

self.name)

1075

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

1076

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

1077

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

1078

# always replaced by /dev/null.)

1079

# The exception is when not debugging but nevertheless

1080

# running in the foreground; use the previously

1081

# created wnull.

1082

popen_args = {"close_fds": True,

1083

"shell": True,

1084

"cwd": "/"}

1085

if (not self.server_settings["debug"]

1086

and self.server_settings["foreground"]):

1087

popen_args.update({"stdout": wnull,

1088

"stderr": wnull})

1089

pipe = multiprocessing.Pipe(duplex=False)

1090

self.checker = multiprocessing.Process(

1091

target=call_pipe,

1092

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

1093

kwargs=popen_args)

1094

self.checker.start()

1095

self.checker_callback_tag = GLib.io_add_watch(

1096

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

1097

self.checker_callback, pipe[0], command)

1098

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

724

1099

return True

725

1100

726

1101

def stop_checker(self):

727

1102

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

728

1103

if self.checker_callback_tag:

729

gobject.source_remove(self.checker_callback_tag)

1104

GLib.source_remove(self.checker_callback_tag)

730

1105

self.checker_callback_tag = None

731

1106

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

732

1107

return

733

1108

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

734

try:

735

self.checker.terminate()

736

#time.sleep(0.5)

737

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

738

# self.checker.kill()

739

except OSError as error:

740

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

741

raise

1109

self.checker.terminate()

742

1110

self.checker = None

743

1111

744

1112

745

def dbus_service_property(dbus_interface, signature="v",

746

access="readwrite", byte_arrays=False):

1113

def dbus_service_property(dbus_interface,

1114

signature="v",

1115

access="readwrite",

1116

byte_arrays=False):

747

1117

"""Decorators for marking methods of a DBusObjectWithProperties to

748

1118

become properties on the D-Bus.

749

1119

750

1120

The decorated method will be called with no arguments by "Get"

751

1121

and with one argument by "Set".

752

1122

753

1123

The parameters, where they are supported, are the same as

754

1124

dbus.service.method, except there is only "signature", since the

755

1125

type from Get() and the type sent to Set() is the same.

758

1128

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

759

1129

if byte_arrays and signature != "ay":

760

1130

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

761

" signature {0!r}".format(signature))

1131

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

1132

762

1133

def decorator(func):

763

1134

func._dbus_is_property = True

764

1135

func._dbus_interface = dbus_interface

767

1138

func._dbus_name = func.__name__

768

1139

if func._dbus_name.endswith("_dbus_property"):

769

1140

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

770

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1141

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

771

1142

return func

1143

772

1144

return decorator

773

1145

774

1146

775

1147

def dbus_interface_annotations(dbus_interface):

776

"""Decorator for marking functions returning interface annotations.

777

1148

"""Decorator for marking functions returning interface annotations

1149

778

1150

Usage:

779

1151

780

1152

@dbus_interface_annotations("org.example.Interface")

781

1153

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

782

1154

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

783

1155

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

784

1156

"false"}

785

1157

"""

1158

786

1159

def decorator(func):

787

1160

func._dbus_is_interface = True

788

1161

func._dbus_interface = dbus_interface

789

1162

func._dbus_name = dbus_interface

790

1163

return func

1164

791

1165

return decorator

792

1166

793

1167

794

1168

def dbus_annotations(annotations):

795

1169

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

796

1170

Usage:

797

1171

1172

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

1173

"org.freedesktop.DBus.Property."

1174

"EmitsChangedSignal": "false"})

798

1175

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

799

1176

access="r")

800

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

801

"org.freedesktop.DBus.Property."

802

"EmitsChangedSignal": "false"})

803

1177

def Property_dbus_property(self):

804

1178

return dbus.Boolean(False)

1179

1180

See also the DBusObjectWithAnnotations class.

805

1181

"""

1182

806

1183

def decorator(func):

807

1184

func._dbus_annotations = annotations

808

1185

return func

1186

809

1187

return decorator

810

1188

811

1189

812

1190

class DBusPropertyException(dbus.exceptions.DBusException):

813

1191

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

814

1192

"""

815

def __unicode__(self):

816

return unicode(str(self))

1193

pass

817

1194

818

1195

819

1196

class DBusPropertyAccessException(DBusPropertyException):

828

1205

pass

829

1206

830

1207

831

class DBusObjectWithProperties(dbus.service.Object):

832

"""A D-Bus object with properties.

833

834

Classes inheriting from this can use the dbus_service_property

835

decorator to expose methods as D-Bus properties. It exposes the

836

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

1208

class DBusObjectWithAnnotations(dbus.service.Object):

1209

"""A D-Bus object with annotations.

1210

1211

Classes inheriting from this can use the dbus_annotations

1212

decorator to add annotations to methods or signals.

837

1213

"""

838

1214

839

1215

@staticmethod

840

1216

def _is_dbus_thing(thing):

841

1217

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

842

1218

843

1219

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

844

1220

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

845

1221

"""

846

return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),

1222

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

847

1223

False)

848

1224

849

1225

def _get_all_dbus_things(self, thing):

850

1226

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

851

1227

"""

852

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

853

name),

1228

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

854

1229

athing.__get__(self))

855

1230

for cls in self.__class__.__mro__

856

1231

for name, athing in

857

inspect.getmembers(cls,

858

self._is_dbus_thing(thing)))

859

1232

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

1233

1234

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1235

out_signature="s",

1236

path_keyword='object_path',

1237

connection_keyword='connection')

1238

def Introspect(self, object_path, connection):

1239

"""Overloading of standard D-Bus method.

1240

1241

Inserts annotation tags on methods and signals.

1242

"""

1243

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

1244

connection)

1245

try:

1246

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

1247

1248

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

1249

# Add annotation tags

1250

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

1251

for tag in if_tag.getElementsByTagName(typ):

1252

annots = dict()

1253

for name, prop in (self.

1254

_get_all_dbus_things(typ)):

1255

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

1256

and prop._dbus_interface

1257

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

1258

annots.update(getattr(

1259

prop, "_dbus_annotations", {}))

1260

for name, value in annots.items():

1261

ann_tag = document.createElement(

1262

"annotation")

1263

ann_tag.setAttribute("name", name)

1264

ann_tag.setAttribute("value", value)

1265

tag.appendChild(ann_tag)

1266

# Add interface annotation tags

1267

for annotation, value in dict(

1268

itertools.chain.from_iterable(

1269

annotations().items()

1270

for name, annotations

1271

in self._get_all_dbus_things("interface")

1272

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

1273

)).items():

1274

ann_tag = document.createElement("annotation")

1275

ann_tag.setAttribute("name", annotation)

1276

ann_tag.setAttribute("value", value)

1277

if_tag.appendChild(ann_tag)

1278

# Fix argument name for the Introspect method itself

1279

if (if_tag.getAttribute("name")

1280

== dbus.INTROSPECTABLE_IFACE):

1281

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

1282

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

1283

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

1284

if (arg.getAttribute("direction")

1285

== "out"):

1286

arg.setAttribute("name",

1287

"xml_data")

1288

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

1289

document.unlink()

1290

except (AttributeError, xml.dom.DOMException,

1291

xml.parsers.expat.ExpatError) as error:

1292

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

1293

exc_info=error)

1294

return xmlstring

1295

1296

1297

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1298

"""A D-Bus object with properties.

1299

1300

Classes inheriting from this can use the dbus_service_property

1301

decorator to expose methods as D-Bus properties. It exposes the

1302

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

1303

"""

1304

860

1305

def _get_dbus_property(self, interface_name, property_name):

861

1306

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

862

1307

property with the specified name and interface.

863

1308

"""

864

for cls in self.__class__.__mro__:

865

for name, value in (inspect.getmembers

866

(cls,

867

self._is_dbus_thing("property"))):

1309

for cls in self.__class__.__mro__:

1310

for name, value in inspect.getmembers(

1311

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

868

1312

if (value._dbus_name == property_name

869

1313

and value._dbus_interface == interface_name):

870

1314

return value.__get__(self)

871

1315

872

1316

# No such property

873

raise DBusPropertyNotFound(self.dbus_object_path + ":"

874

+ interface_name + "."

875

+ property_name)

876

877

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

1317

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

1318

self.dbus_object_path, interface_name, property_name))

1319

1320

@classmethod

1321

def _get_all_interface_names(cls):

1322

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

1323

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

1324

"_dbus_interface", None)

1325

for x in (inspect.getmro(cls))

1326

for attr in dir(x))

1327

if name is not None)

1328

1329

@dbus.service.method(dbus.PROPERTIES_IFACE,

1330

in_signature="ss",

878

1331

out_signature="v")

879

1332

def Get(self, interface_name, property_name):

880

1333

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

886

1339

if not hasattr(value, "variant_level"):

887

1340

return value

888

1341

return type(value)(value, variant_level=value.variant_level+1)

889

1342

890

1343

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")

891

1344

def Set(self, interface_name, property_name, value):

892

1345

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

898

1351

# The byte_arrays option is not supported yet on

899

1352

# signatures other than "ay".

900

1353

if prop._dbus_signature != "ay":

901

raise ValueError

1354

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

1355

"'ay' signature {!r}"

1356

.format(prop._dbus_signature))

902

1357

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

903

1358

for byte in value))

904

1359

prop(value)

905

906

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

1360

1361

@dbus.service.method(dbus.PROPERTIES_IFACE,

1362

in_signature="s",

907

1363

out_signature="a{sv}")

908

1364

def GetAll(self, interface_name):

909

1365

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

910

1366

standard.

911

1367

912

1368

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

913

1369

"""

914

1370

properties = {}

924

1380

if not hasattr(value, "variant_level"):

925

1381

properties[name] = value

926

1382

continue

927

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

928

value.variant_level+1)

1383

properties[name] = type(value)(

1384

value, variant_level=value.variant_level + 1)

929

1385

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

930

1386

1387

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

1388

def PropertiesChanged(self, interface_name, changed_properties,

1389

invalidated_properties):

1390

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

1391

standard.

1392

"""

1393

pass

1394

931

1395

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

932

1396

out_signature="s",

933

1397

path_keyword='object_path',

934

1398

connection_keyword='connection')

935

1399

def Introspect(self, object_path, connection):

936

1400

"""Overloading of standard D-Bus method.

937

1401

938

1402

Inserts property tags and interface annotation tags.

939

1403

"""

940

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

941

connection)

1404

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1405

object_path,

1406

connection)

942

1407

try:

943

1408

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

1409

944

1410

def make_tag(document, name, prop):

945

1411

e = document.createElement("property")

946

1412

e.setAttribute("name", name)

947

1413

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

948

1414

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

949

1415

return e

1416

950

1417

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

951

1418

# Add property tags

952

1419

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

955

1422

if prop._dbus_interface

956

1423

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

957

1424

if_tag.appendChild(tag)

958

# Add annotation tags

959

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

960

for tag in if_tag.getElementsByTagName(typ):

961

annots = dict()

962

for name, prop in (self.

963

_get_all_dbus_things(typ)):

964

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

965

and prop._dbus_interface

966

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

967

annots.update(getattr

968

(prop,

969

"_dbus_annotations",

970

{}))

971

for name, value in annots.iteritems():

972

ann_tag = document.createElement(

973

"annotation")

974

ann_tag.setAttribute("name", name)

975

ann_tag.setAttribute("value", value)

976

tag.appendChild(ann_tag)

977

# Add interface annotation tags

978

for annotation, value in dict(

979

itertools.chain(

980

*(annotations().iteritems()

981

for name, annotations in

982

self._get_all_dbus_things("interface")

983

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

984

))).iteritems():

985

ann_tag = document.createElement("annotation")

986

ann_tag.setAttribute("name", annotation)

987

ann_tag.setAttribute("value", value)

988

if_tag.appendChild(ann_tag)

1425

# Add annotation tags for properties

1426

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

1427

annots = dict()

1428

for name, prop in self._get_all_dbus_things(

1429

"property"):

1430

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

1431

and prop._dbus_interface

1432

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

1433

annots.update(getattr(

1434

prop, "_dbus_annotations", {}))

1435

for name, value in annots.items():

1436

ann_tag = document.createElement(

1437

"annotation")

1438

ann_tag.setAttribute("name", name)

1439

ann_tag.setAttribute("value", value)

1440

tag.appendChild(ann_tag)

989

1441

# Add the names to the return values for the

990

1442

# "org.freedesktop.DBus.Properties" methods

991

1443

if (if_tag.getAttribute("name")

1010

1462

return xmlstring

1011

1463

1012

1464

1013

def datetime_to_dbus (dt, variant_level=0):

1465

try:

1466

dbus.OBJECT_MANAGER_IFACE

1467

except AttributeError:

1468

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

1469

1470

1471

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1472

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

1473

1474

Classes inheriting from this exposes the standard

1475

GetManagedObjects call and the InterfacesAdded and

1476

InterfacesRemoved signals on the standard

1477

"org.freedesktop.DBus.ObjectManager" interface.

1478

1479

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

1480

manually.

1481

"""

1482

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1483

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

1484

def GetManagedObjects(self):

1485

"""This function must be overridden"""

1486

raise NotImplementedError()

1487

1488

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1489

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

1490

def InterfacesAdded(self, object_path, interfaces_and_properties):

1491

pass

1492

1493

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

1494

def InterfacesRemoved(self, object_path, interfaces):

1495

pass

1496

1497

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1498

out_signature="s",

1499

path_keyword='object_path',

1500

connection_keyword='connection')

1501

def Introspect(self, object_path, connection):

1502

"""Overloading of standard D-Bus method.

1503

1504

Override return argument name of GetManagedObjects to be

1505

"objpath_interfaces_and_properties"

1506

"""

1507

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1508

object_path,

1509

connection)

1510

try:

1511

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

1512

1513

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

1514

# Fix argument name for the GetManagedObjects method

1515

if (if_tag.getAttribute("name")

1516

== dbus.OBJECT_MANAGER_IFACE):

1517

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

1518

if (cn.getAttribute("name")

1519

== "GetManagedObjects"):

1520

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

1521

if (arg.getAttribute("direction")

1522

== "out"):

1523

arg.setAttribute(

1524

"name",

1525

"objpath_interfaces"

1526

"_and_properties")

1527

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

1528

document.unlink()

1529

except (AttributeError, xml.dom.DOMException,

1530

xml.parsers.expat.ExpatError) as error:

1531

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

1532

exc_info=error)

1533

return xmlstring

1534

1535

1536

def datetime_to_dbus(dt, variant_level=0):

1014

1537

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

1015

1538

if dt is None:

1016

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

1017

return dbus.String(dt.isoformat(),

1018

variant_level=variant_level)

1019

1020

1021

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

1022

.__metaclass__):

1023

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

1024

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

1539

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

1540

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

1541

1542

1543

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1544

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

1545

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

1546

interface names according to the "alt_interface_names" mapping.

1547

Usage:

1548

1549

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

1550

"net.example.AlternateInterface"})

1551

class SampleDBusObject(dbus.service.Object):

1552

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

1553

def SampleDBusMethod():

1554

pass

1555

1556

The above "SampleDBusMethod" on "SampleDBusObject" will be

1557

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

1558

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

1559

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

1560

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

1561

1562

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

1563

(from DBusObjectWithProperties) and interfaces (from the

1564

dbus_interface_annotations decorator).

1025

1565

"""

1026

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

1027

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

1028

# methods, signals, or properties in them

1029

old_interface_names = []

1030

for base in (b for b in bases

1031

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

1032

# Go though all attributes of the base class

1033

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

1566

1567

def wrapper(cls):

1568

for orig_interface_name, alt_interface_name in (

1569

alt_interface_names.items()):

1570

attr = {}

1571

interface_names = set()

1572

# Go though all attributes of the class

1573

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

1034

1574

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

1035

1575

# with the wrong interface name

1036

1576

if (not hasattr(attribute, "_dbus_interface")

1037

or not attribute._dbus_interface

1038

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

1577

or not attribute._dbus_interface.startswith(

1578

orig_interface_name)):

1039

1579

continue

1040

1580

# Create an alternate D-Bus interface name based on

1041

1581

# the current name

1042

alt_interface = (attribute._dbus_interface

1043

.replace("se.recompile.Mandos",

1044

"se.bsnet.fukt.Mandos"))

1045

if alt_interface != attribute._dbus_interface:

1046

old_interface_names.append(alt_interface)

1582

alt_interface = attribute._dbus_interface.replace(

1583

orig_interface_name, alt_interface_name)

1584

interface_names.add(alt_interface)

1047

1585

# Is this a D-Bus signal?

1048

1586

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

1049

# Extract the original non-method function by

1050

# black magic

1051

nonmethod_func = (dict(

1587

# Extract the original non-method undecorated

1588

# function by black magic

1589

if sys.version_info.major == 2:

1590

nonmethod_func = (dict(

1052

1591

zip(attribute.func_code.co_freevars,

1053

attribute.__closure__))["func"]

1054

.cell_contents)

1592

attribute.__closure__))

1593

["func"].cell_contents)

1594

else:

1595

nonmethod_func = (dict(

1596

zip(attribute.__code__.co_freevars,

1597

attribute.__closure__))

1598

["func"].cell_contents)

1055

1599

# Create a new, but exactly alike, function

1056

1600

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

1057

1601

# with the alternate D-Bus interface name

1058

new_function = (dbus.service.signal

1059

(alt_interface,

1060

attribute._dbus_signature)

1061

(types.FunctionType(

1062

nonmethod_func.func_code,

1063

nonmethod_func.func_globals,

1064

nonmethod_func.func_name,

1065

nonmethod_func.func_defaults,

1066

nonmethod_func.func_closure)))

1602

new_function = copy_function(nonmethod_func)

1603

new_function = (dbus.service.signal(

1604

alt_interface,

1605

attribute._dbus_signature)(new_function))

1067

1606

# Copy annotations, if any

1068

1607

try:

1069

new_function._dbus_annotations = (

1070

dict(attribute._dbus_annotations))

1608

new_function._dbus_annotations = dict(

1609

attribute._dbus_annotations)

1071

1610

except AttributeError:

1072

1611

pass

1612

1073

1613

# Define a creator of a function to call both the

1074

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

1075

# signals gets sent when the function is called

1614

# original and alternate functions, so both the

1615

# original and alternate signals gets sent when

1616

# the function is called

1076

1617

def fixscope(func1, func2):

1077

1618

"""This function is a scope container to pass

1078

1619

func1 and func2 to the "call_both" function

1079

1620

outside of its arguments"""

1621

1622

@functools.wraps(func2)

1080

1623

def call_both(*args, **kwargs):

1081

1624

"""This function will emit two D-Bus

1082

1625

signals by calling func1 and func2"""

1083

1626

func1(*args, **kwargs)

1084

1627

func2(*args, **kwargs)

1628

# Make wrapper function look like a D-Bus

1629

# signal

1630

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

1631

if name.startswith("_dbus_"):

1632

setattr(call_both, name, attr)

1633

1085

1634

return call_both

1086

1635

# Create the "call_both" function and add it to

1087

1636

# the class

1088

attr[attrname] = fixscope(attribute,

1089

new_function)

1637

attr[attrname] = fixscope(attribute, new_function)

1090

1638

# Is this a D-Bus method?

1091

1639

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

1092

1640

# Create a new, but exactly alike, function

1093

1641

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

1094

1642

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

1095

1643

# to the class.

1096

attr[attrname] = (dbus.service.method

1097

(alt_interface,

1098

attribute._dbus_in_signature,

1099

attribute._dbus_out_signature)

1100

(types.FunctionType

1101

(attribute.func_code,

1102

attribute.func_globals,

1103

attribute.func_name,

1104

attribute.func_defaults,

1105

attribute.func_closure)))

1644

attr[attrname] = (

1645

dbus.service.method(

1646

alt_interface,

1647

attribute._dbus_in_signature,

1648

attribute._dbus_out_signature)

1649

(copy_function(attribute)))

1106

1650

# Copy annotations, if any

1107

1651

try:

1108

attr[attrname]._dbus_annotations = (

1109

dict(attribute._dbus_annotations))

1652

attr[attrname]._dbus_annotations = dict(

1653

attribute._dbus_annotations)

1110

1654

except AttributeError:

1111

1655

pass

1112

1656

# Is this a D-Bus property?

1115

1659

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

1116

1660

# property with the alternate D-Bus interface

1117

1661

# name. Add it to the class.

1118

attr[attrname] = (dbus_service_property

1119

(alt_interface,

1120

attribute._dbus_signature,

1121

attribute._dbus_access,

1122

attribute

1123

._dbus_get_args_options

1124

["byte_arrays"])

1125

(types.FunctionType

1126

(attribute.func_code,

1127

attribute.func_globals,

1128

attribute.func_name,

1129

attribute.func_defaults,

1130

attribute.func_closure)))

1662

attr[attrname] = (dbus_service_property(

1663

alt_interface, attribute._dbus_signature,

1664

attribute._dbus_access,

1665

attribute._dbus_get_args_options

1666

["byte_arrays"])

1667

(copy_function(attribute)))

1131

1668

# Copy annotations, if any

1132

1669

try:

1133

attr[attrname]._dbus_annotations = (

1134

dict(attribute._dbus_annotations))

1670

attr[attrname]._dbus_annotations = dict(

1671

attribute._dbus_annotations)

1135

1672

except AttributeError:

1136

1673

pass

1137

1674

# Is this a D-Bus interface?

1140

1677

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

1141

1678

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

1142

1679

# to the class.

1143

attr[attrname] = (dbus_interface_annotations

1144

(alt_interface)

1145

(types.FunctionType

1146

(attribute.func_code,

1147

attribute.func_globals,

1148

attribute.func_name,

1149

attribute.func_defaults,

1150

attribute.func_closure)))

1151

# Deprecate all old interfaces

1152

basename="_AlternateDBusNamesMetaclass_interface_annotation{0}"

1153

for old_interface_name in old_interface_names:

1154

@dbus_interface_annotations(old_interface_name)

1155

def func(self):

1156

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

1157

# Find an unused name

1158

for aname in (basename.format(i) for i in

1159

itertools.count()):

1160

if aname not in attr:

1161

attr[aname] = func

1162

break

1163

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

1164

1165

1680

attr[attrname] = (

1681

dbus_interface_annotations(alt_interface)

1682

(copy_function(attribute)))

1683

if deprecate:

1684

# Deprecate all alternate interfaces

1685

iname = "_AlternateDBusNames_interface_annotation{}"

1686

for interface_name in interface_names:

1687

1688

@dbus_interface_annotations(interface_name)

1689

def func(self):

1690

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

1691

"true"}

1692

# Find an unused name

1693

for aname in (iname.format(i)

1694

for i in itertools.count()):

1695

if aname not in attr:

1696

attr[aname] = func

1697

break

1698

if interface_names:

1699

# Replace the class with a new subclass of it with

1700

# methods, signals, etc. as created above.

1701

if sys.version_info.major == 2:

1702

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

1703

(cls, ), attr)

1704

else:

1705

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

1706

(cls, ), attr)

1707

return cls

1708

1709

return wrapper

1710

1711

1712

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

1713

"se.bsnet.fukt.Mandos"})

1166

1714

class ClientDBus(Client, DBusObjectWithProperties):

1167

1715

"""A Client class using D-Bus

1168

1716

1169

1717

Attributes:

1170

1718

dbus_object_path: dbus.ObjectPath

1171

1719

bus: dbus.SystemBus()

1172

1720

"""

1173

1721

1174

1722

runtime_expansions = (Client.runtime_expansions

1175

+ ("dbus_object_path",))

1176

1723

+ ("dbus_object_path", ))

1724

1725

_interface = "se.recompile.Mandos.Client"

1726

1177

1727

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

1178

1179

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

1728

1729

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

1180

1730

self.bus = bus

1181

1731

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

1182

1732

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

1183

1733

# the D-Bus

1184

client_object_name = unicode(self.name).translate(

1734

client_object_name = str(self.name).translate(

1185

1735

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

1186

1736

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

1187

self.dbus_object_path = (dbus.ObjectPath

1188

("/clients/" + client_object_name))

1737

self.dbus_object_path = dbus.ObjectPath(

1738

"/clients/" + client_object_name)

1189

1739

DBusObjectWithProperties.__init__(self, self.bus,

1190

1740

self.dbus_object_path)

1191

1192

def notifychangeproperty(transform_func,

1193

dbus_name, type_func=lambda x: x,

1194

variant_level=1):

1741

1742

def notifychangeproperty(transform_func, dbus_name,

1743

type_func=lambda x: x,

1744

variant_level=1,

1745

invalidate_only=False,

1746

_interface=_interface):

1195

1747

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

1196

1748

its changes to DBus.

1197

1749

1198

1750

transform_fun: Function that takes a value and a variant_level

1199

1751

and transforms it to a D-Bus type.

1200

1752

dbus_name: D-Bus name of the variable

1202

1754

to the D-Bus. Default: no transform

1203

1755

variant_level: D-Bus variant level. Default: 1

1204

1756

"""

1205

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

1757

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

1758

1206

1759

def setter(self, value):

1207

1760

if hasattr(self, "dbus_object_path"):

1208

1761

if (not hasattr(self, attrname) or

1209

1762

type_func(getattr(self, attrname, None))

1210

1763

!= type_func(value)):

1211

dbus_value = transform_func(type_func(value),

1212

variant_level

1213

=variant_level)

1214

self.PropertyChanged(dbus.String(dbus_name),

1215

dbus_value)

1764

if invalidate_only:

1765

self.PropertiesChanged(

1766

_interface, dbus.Dictionary(),

1767

dbus.Array((dbus_name, )))

1768

else:

1769

dbus_value = transform_func(

1770

type_func(value),

1771

variant_level=variant_level)

1772

self.PropertyChanged(dbus.String(dbus_name),

1773

dbus_value)

1774

self.PropertiesChanged(

1775

_interface,

1776

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

1777

dbus_value}),

1778

dbus.Array())

1216

1779

setattr(self, attrname, value)

1217

1780

1218

1781

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

1219

1220

1782

1221

1783

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1222

1784

approvals_pending = notifychangeproperty(dbus.Boolean,

1223

1785

"ApprovalPending",

1224

type_func = bool)

1786

type_func=bool)

1225

1787

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

1226

1788

last_enabled = notifychangeproperty(datetime_to_dbus,

1227

1789

"LastEnabled")

1228

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

1229

type_func = lambda checker:

1230

checker is not None)

1790

checker = notifychangeproperty(

1791

dbus.Boolean, "CheckerRunning",

1792

type_func=lambda checker: checker is not None)

1231

1793

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1232

1794

"LastCheckedOK")

1233

1795

last_checker_status = notifychangeproperty(dbus.Int16,

1236

1798

datetime_to_dbus, "LastApprovalRequest")

1237

1799

approved_by_default = notifychangeproperty(dbus.Boolean,

1238

1800

"ApprovedByDefault")

1239

approval_delay = notifychangeproperty(dbus.UInt64,

1240

"ApprovalDelay",

1241

type_func =

1242

timedelta_to_milliseconds)

1801

approval_delay = notifychangeproperty(

1802

dbus.UInt64, "ApprovalDelay",

1803

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

1243

1804

approval_duration = notifychangeproperty(

1244

1805

dbus.UInt64, "ApprovalDuration",

1245

type_func = timedelta_to_milliseconds)

1806

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

1246

1807

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

1247

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

1248

type_func =

1249

timedelta_to_milliseconds)

1808

timeout = notifychangeproperty(

1809

dbus.UInt64, "Timeout",

1810

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

1250

1811

extended_timeout = notifychangeproperty(

1251

1812

dbus.UInt64, "ExtendedTimeout",

1252

type_func = timedelta_to_milliseconds)

1253

interval = notifychangeproperty(dbus.UInt64,

1254

"Interval",

1255

type_func =

1256

timedelta_to_milliseconds)

1813

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

1814

interval = notifychangeproperty(

1815

dbus.UInt64, "Interval",

1816

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

1257

1817

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

1258

1818

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

1819

invalidate_only=True)

1820

1259

1821

del notifychangeproperty

1260

1822

1261

1823

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

1262

1824

try:

1263

1825

self.remove_from_connection()

1266

1828

if hasattr(DBusObjectWithProperties, "__del__"):

1267

1829

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

1268

1830

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

1269

1270

def checker_callback(self, pid, condition, command,

1271

*args, **kwargs):

1272

self.checker_callback_tag = None

1273

self.checker = None

1274

if os.WIFEXITED(condition):

1275

exitstatus = os.WEXITSTATUS(condition)

1831

1832

def checker_callback(self, source, condition,

1833

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

1834

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

1835

connection, command, *args,

1836

**kwargs)

1837

exitstatus = self.last_checker_status

1838

if exitstatus >= 0:

1276

1839

# Emit D-Bus signal

1277

1840

self.CheckerCompleted(dbus.Int16(exitstatus),

1278

dbus.Int64(condition),

1841

# This is specific to GNU libC

1842

dbus.Int64(exitstatus << 8),

1279

1843

dbus.String(command))

1280

1844

else:

1281

1845

# Emit D-Bus signal

1282

1846

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

1283

dbus.Int64(condition),

1847

dbus.Int64(

1848

# This is specific to GNU libC

1849

(exitstatus << 8)

1850

| self.last_checker_signal),

1284

1851

dbus.String(command))

1285

1286

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

1287

*args, **kwargs)

1288

1852

return ret

1853

1289

1854

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

1290

old_checker = self.checker

1291

if self.checker is not None:

1292

old_checker_pid = self.checker.pid

1293

else:

1294

old_checker_pid = None

1855

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

1295

1856

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

1296

1857

# Only if new checker process was started

1297

1858

if (self.checker is not None

1299

1860

# Emit D-Bus signal

1300

1861

self.CheckerStarted(self.current_checker_command)

1301

1862

return r

1302

1863

1303

1864

def _reset_approved(self):

1304

1865

self.approved = None

1305

1866

return False

1306

1867

1307

1868

def approve(self, value=True):

1308

self.send_changedstate()

1309

1869

self.approved = value

1310

gobject.timeout_add(timedelta_to_milliseconds

1311

(self.approval_duration),

1312

self._reset_approved)

1313

1314

1315

## D-Bus methods, signals & properties

1316

_interface = "se.recompile.Mandos.Client"

1317

1318

## Interfaces

1319

1320

@dbus_interface_annotations(_interface)

1321

def _foo(self):

1322

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

1323

"false"}

1324

1325

## Signals

1326

1870

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

1871

* 1000), self._reset_approved)

1872

self.send_changedstate()

1873

1874

# D-Bus methods, signals & properties

1875

1876

# Interfaces

1877

1878

# Signals

1879

1327

1880

# CheckerCompleted - signal

1328

1881

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

1329

1882

def CheckerCompleted(self, exitcode, waitstatus, command):

1330

1883

"D-Bus signal"

1331

1884

pass

1332

1885

1333

1886

# CheckerStarted - signal

1334

1887

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

1335

1888

def CheckerStarted(self, command):

1336

1889

"D-Bus signal"

1337

1890

pass

1338

1891

1339

1892

# PropertyChanged - signal

1893

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

1340

1894

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

1341

1895

def PropertyChanged(self, property, value):

1342

1896

"D-Bus signal"

1343

1897

pass

1344

1898

1345

1899

# GotSecret - signal

1346

1900

@dbus.service.signal(_interface)

1347

1901

def GotSecret(self):

1350

1904

server to mandos-client

1351

1905

"""

1352

1906

pass

1353

1907

1354

1908

# Rejected - signal

1355

1909

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

1356

1910

def Rejected(self, reason):

1357

1911

"D-Bus signal"

1358

1912

pass

1359

1913

1360

1914

# NeedApproval - signal

1361

1915

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

1362

1916

def NeedApproval(self, timeout, default):

1363

1917

"D-Bus signal"

1364

1918

return self.need_approval()

1365

1366

## Methods

1367

1919

1920

# Methods

1921

1368

1922

# Approve - method

1369

1923

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

1370

1924

def Approve(self, value):

1371

1925

self.approve(value)

1372

1926

1373

1927

# CheckedOK - method

1374

1928

@dbus.service.method(_interface)

1375

1929

def CheckedOK(self):

1376

1930

self.checked_ok()

1377

1931

1378

1932

# Enable - method

1933

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

1379

1934

@dbus.service.method(_interface)

1380

1935

def Enable(self):

1381

1936

"D-Bus method"

1382

1937

self.enable()

1383

1938

1384

1939

# StartChecker - method

1940

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

1385

1941

@dbus.service.method(_interface)

1386

1942

def StartChecker(self):

1387

1943

"D-Bus method"

1388

1944

self.start_checker()

1389

1945

1390

1946

# Disable - method

1947

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

1391

1948

@dbus.service.method(_interface)

1392

1949

def Disable(self):

1393

1950

"D-Bus method"

1394

1951

self.disable()

1395

1952

1396

1953

# StopChecker - method

1954

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

1397

1955

@dbus.service.method(_interface)

1398

1956

def StopChecker(self):

1399

1957

self.stop_checker()

1400

1401

## Properties

1402

1958

1959

# Properties

1960

1403

1961

# ApprovalPending - property

1404

1962

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

1405

1963

def ApprovalPending_dbus_property(self):

1406

1964

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

1407

1965

1408

1966

# ApprovedByDefault - property

1409

@dbus_service_property(_interface, signature="b",

1967

@dbus_service_property(_interface,

1968

signature="b",

1410

1969

access="readwrite")

1411

1970

def ApprovedByDefault_dbus_property(self, value=None):

1412

1971

if value is None: # get

1413

1972

return dbus.Boolean(self.approved_by_default)

1414

1973

self.approved_by_default = bool(value)

1415

1974

1416

1975

# ApprovalDelay - property

1417

@dbus_service_property(_interface, signature="t",

1976

@dbus_service_property(_interface,

1977

signature="t",

1418

1978

access="readwrite")

1419

1979

def ApprovalDelay_dbus_property(self, value=None):

1420

1980

if value is None: # get

1421

return dbus.UInt64(self.approval_delay_milliseconds())

1981

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

1982

* 1000)

1422

1983

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

1423

1984

1424

1985

# ApprovalDuration - property

1425

@dbus_service_property(_interface, signature="t",

1986

@dbus_service_property(_interface,

1987

signature="t",

1426

1988

access="readwrite")

1427

1989

def ApprovalDuration_dbus_property(self, value=None):

1428

1990

if value is None: # get

1429

return dbus.UInt64(timedelta_to_milliseconds(

1430

self.approval_duration))

1991

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

1992

* 1000)

1431

1993

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

1432

1994

1433

1995

# Name - property

1996

@dbus_annotations(

1997

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

1434

1998

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

1435

1999

def Name_dbus_property(self):

1436

2000

return dbus.String(self.name)

1437

2001

1438

2002

# Fingerprint - property

2003

@dbus_annotations(

2004

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

1439

2005

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

1440

2006

def Fingerprint_dbus_property(self):

1441

2007

return dbus.String(self.fingerprint)

1442

2008

1443

2009

# Host - property

1444

@dbus_service_property(_interface, signature="s",

2010

@dbus_service_property(_interface,

2011

signature="s",

1445

2012

access="readwrite")

1446

2013

def Host_dbus_property(self, value=None):

1447

2014

if value is None: # get

1448

2015

return dbus.String(self.host)

1449

self.host = unicode(value)

1450

2016

self.host = str(value)

2017

1451

2018

# Created - property

2019

@dbus_annotations(

2020

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

1452

2021

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

1453

2022

def Created_dbus_property(self):

1454

2023

return datetime_to_dbus(self.created)

1455

2024

1456

2025

# LastEnabled - property

1457

2026

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

1458

2027

def LastEnabled_dbus_property(self):

1459

2028

return datetime_to_dbus(self.last_enabled)

1460

2029

1461

2030

# Enabled - property

1462

@dbus_service_property(_interface, signature="b",

2031

@dbus_service_property(_interface,

2032

signature="b",

1463

2033

access="readwrite")

1464

2034

def Enabled_dbus_property(self, value=None):

1465

2035

if value is None: # get

1468

2038

self.enable()

1469

2039

else:

1470

2040

self.disable()

1471

2041

1472

2042

# LastCheckedOK - property

1473

@dbus_service_property(_interface, signature="s",

2043

@dbus_service_property(_interface,

2044

signature="s",

1474

2045

access="readwrite")

1475

2046

def LastCheckedOK_dbus_property(self, value=None):

1476

2047

if value is not None:

1477

2048

self.checked_ok()

1478

2049

return

1479

2050

return datetime_to_dbus(self.last_checked_ok)

1480

2051

1481

2052

# LastCheckerStatus - property

1482

@dbus_service_property(_interface, signature="n",

1483

access="read")

2053

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

1484

2054

def LastCheckerStatus_dbus_property(self):

1485

2055

return dbus.Int16(self.last_checker_status)

1486

2056

1487

2057

# Expires - property

1488

2058

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

1489

2059

def Expires_dbus_property(self):

1490

2060

return datetime_to_dbus(self.expires)

1491

2061

1492

2062

# LastApprovalRequest - property

1493

2063

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

1494

2064

def LastApprovalRequest_dbus_property(self):

1495

2065

return datetime_to_dbus(self.last_approval_request)

1496

2066

1497

2067

# Timeout - property

1498

@dbus_service_property(_interface, signature="t",

2068

@dbus_service_property(_interface,

2069

signature="t",

1499

2070

access="readwrite")

1500

2071

def Timeout_dbus_property(self, value=None):

1501

2072

if value is None: # get

1502

return dbus.UInt64(self.timeout_milliseconds())

2073

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

2074

old_timeout = self.timeout

1503

2075

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

1504

# Reschedule timeout

2076

# Reschedule disabling

1505

2077

if self.enabled:

1506

2078

now = datetime.datetime.utcnow()

1507

time_to_die = timedelta_to_milliseconds(

1508

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

1509

if time_to_die <= 0:

2079

self.expires += self.timeout - old_timeout

2080

if self.expires <= now:

1510

2081

# The timeout has passed

1511

2082

self.disable()

1512

2083

else:

1513

self.expires = (now +

1514

datetime.timedelta(milliseconds =

1515

time_to_die))

1516

2084

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

1517

2085

is None):

1518

2086

return

1519

gobject.source_remove(self.disable_initiator_tag)

1520

self.disable_initiator_tag = (gobject.timeout_add

1521

(time_to_die,

1522

self.disable))

1523

2087

GLib.source_remove(self.disable_initiator_tag)

2088

self.disable_initiator_tag = GLib.timeout_add(

2089

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

2090

self.disable)

2091

1524

2092

# ExtendedTimeout - property

1525

@dbus_service_property(_interface, signature="t",

2093

@dbus_service_property(_interface,

2094

signature="t",

1526

2095

access="readwrite")

1527

2096

def ExtendedTimeout_dbus_property(self, value=None):

1528

2097

if value is None: # get

1529

return dbus.UInt64(self.extended_timeout_milliseconds())

2098

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

2099

* 1000)

1530

2100

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

1531

2101

1532

2102

# Interval - property

1533

@dbus_service_property(_interface, signature="t",

2103

@dbus_service_property(_interface,

2104

signature="t",

1534

2105

access="readwrite")

1535

2106

def Interval_dbus_property(self, value=None):

1536

2107

if value is None: # get

1537

return dbus.UInt64(self.interval_milliseconds())

2108

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

1538

2109

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

1539

2110

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

1540

2111

return

1541

2112

if self.enabled:

1542

2113

# Reschedule checker run

1543

gobject.source_remove(self.checker_initiator_tag)

1544

self.checker_initiator_tag = (gobject.timeout_add

1545

(value, self.start_checker))

1546

self.start_checker() # Start one now, too

1547

2114

GLib.source_remove(self.checker_initiator_tag)

2115

self.checker_initiator_tag = GLib.timeout_add(

2116

value, self.start_checker)

2117

self.start_checker() # Start one now, too

2118

1548

2119

# Checker - property

1549

@dbus_service_property(_interface, signature="s",

2120

@dbus_service_property(_interface,

2121

signature="s",

1550

2122

access="readwrite")

1551

2123

def Checker_dbus_property(self, value=None):

1552

2124

if value is None: # get

1553

2125

return dbus.String(self.checker_command)

1554

self.checker_command = unicode(value)

1555

2126

self.checker_command = str(value)

2127

1556

2128

# CheckerRunning - property

1557

@dbus_service_property(_interface, signature="b",

2129

@dbus_service_property(_interface,

2130

signature="b",

1558

2131

access="readwrite")

1559

2132

def CheckerRunning_dbus_property(self, value=None):

1560

2133

if value is None: # get

1563

2136

self.start_checker()

1564

2137

else:

1565

2138

self.stop_checker()

1566

2139

1567

2140

# ObjectPath - property

2141

@dbus_annotations(

2142

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

2143

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

1568

2144

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

1569

2145

def ObjectPath_dbus_property(self):

1570

return self.dbus_object_path # is already a dbus.ObjectPath

1571

2146

return self.dbus_object_path # is already a dbus.ObjectPath

2147

1572

2148

# Secret = property

1573

@dbus_service_property(_interface, signature="ay",

1574

access="write", byte_arrays=True)

2149

@dbus_annotations(

2150

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

2151

"invalidates"})

2152

@dbus_service_property(_interface,

2153

signature="ay",

2154

access="write",

2155

byte_arrays=True)

1575

2156

def Secret_dbus_property(self, value):

1576

self.secret = str(value)

1577

2157

self.secret = bytes(value)

2158

1578

2159

del _interface

1579

2160

1580

2161

1583

2164

self._pipe = child_pipe

1584

2165

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

1585

2166

if not self._pipe.recv():

1586

raise KeyError()

1587

2167

raise KeyError(fpr)

2168

1588

2169

def __getattribute__(self, name):

1589

2170

if name == '_pipe':

1590

2171

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

1593

2174

if data[0] == 'data':

1594

2175

return data[1]

1595

2176

if data[0] == 'function':

2177

1596

2178

def func(*args, **kwargs):

1597

2179

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

1598

2180

return self._pipe.recv()[1]

2181

1599

2182

return func

1600

2183

1601

2184

def __setattr__(self, name, value):

1602

2185

if name == '_pipe':

1603

2186

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

1604

2187

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

1605

2188

1606

2189

1607

class ClientDBusTransitional(ClientDBus):

1608

__metaclass__ = AlternateDBusNamesMetaclass

1609

1610

1611

2190

class ClientHandler(socketserver.BaseRequestHandler, object):

1612

2191

"""A class to handle client connections.

1613

2192

1614

2193

Instantiated once for each connection to handle it.

1615

2194

Note: This will run in its own forked process."""

1616

2195

1617

2196

def handle(self):

1618

2197

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

1619

2198

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

1620

unicode(self.client_address))

2199

str(self.client_address))

1621

2200

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

1622

2201

self.server.child_pipe.fileno())

1623

1624

session = (gnutls.connection

1625

.ClientSession(self.request,

1626

gnutls.connection

1627

.X509Credentials()))

1628

1629

# Note: gnutls.connection.X509Credentials is really a

1630

# generic GnuTLS certificate credentials object so long as

1631

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

1632

# here despite using OpenPGP certificates.

1633

1634

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

1635

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

1636

# "+COMP-NULL", "+CTYPE-OPENPGP",

1637

# "+DHE-DSS"))

2202

2203

session = gnutls.ClientSession(self.request)

2204

2205

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

2206

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

2207

# "+COMP-NULL", "+CTYPE-OPENPGP",

2208

# "+DHE-DSS"))

1638

2209

# Use a fallback default, since this MUST be set.

1639

2210

priority = self.server.gnutls_priority

1640

2211

if priority is None:

1641

2212

priority = "NORMAL"

1642

(gnutls.library.functions

1643

.gnutls_priority_set_direct(session._c_object,

1644

priority, None))

1645

2213

gnutls.priority_set_direct(session._c_object,

2214

priority.encode("utf-8"),

2215

None)

2216

1646

2217

# Start communication using the Mandos protocol

1647

2218

# Get protocol number

1648

2219

line = self.request.makefile().readline()

1649

2220

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

1650

2221

try:

1651

2222

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

1652

raise RuntimeError

2223

raise RuntimeError(line)

1653

2224

except (ValueError, IndexError, RuntimeError) as error:

1654

2225

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

1655

2226

return

1656

2227

1657

2228

# Start GnuTLS connection

1658

2229

try:

1659

2230

session.handshake()

1660

except gnutls.errors.GNUTLSError as error:

2231

except gnutls.Error as error:

1661

2232

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

1662

2233

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

1663

2234

# established. Just abandon the request.

1664

2235

return

1665

2236

logger.debug("Handshake succeeded")

1666

2237

1667

2238

approval_required = False

1668

2239

try:

1669

2240

try:

1670

fpr = self.fingerprint(self.peer_certificate

1671

(session))

1672

except (TypeError,

1673

gnutls.errors.GNUTLSError) as error:

2241

fpr = self.fingerprint(

2242

self.peer_certificate(session))

2243

except (TypeError, gnutls.Error) as error:

1674

2244

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

1675

2245

return

1676

2246

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

1677

2247

1678

2248

try:

1679

2249

client = ProxyClient(child_pipe, fpr,

1680

2250

self.client_address)

1681

2251

except KeyError:

1682

2252

return

1683

2253

1684

2254

if client.approval_delay:

1685

2255

delay = client.approval_delay

1686

2256

client.approvals_pending += 1

1687

2257

approval_required = True

1688

2258

1689

2259

while True:

1690

2260

if not client.enabled:

1691

2261

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

1692

client.name)

2262

client.name)

1693

2263

if self.server.use_dbus:

1694

2264

# Emit D-Bus signal

1695

2265

client.Rejected("Disabled")

1696

2266

return

1697

2267

1698

2268

if client.approved or not client.approval_delay:

1699

#We are approved or approval is disabled

2269

# We are approved or approval is disabled

1700

2270

break

1701

2271

elif client.approved is None:

1702

2272

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

1704

2274

if self.server.use_dbus:

1705

2275

# Emit D-Bus signal

1706

2276

client.NeedApproval(

1707

client.approval_delay_milliseconds(),

1708

client.approved_by_default)

2277

client.approval_delay.total_seconds()

2278

* 1000, client.approved_by_default)

1709

2279

else:

1710

2280

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

1711

2281

client.name)

1713

2283

# Emit D-Bus signal

1714

2284

client.Rejected("Denied")

1715

2285

return

1716

1717

#wait until timeout or approved

2286

2287

# wait until timeout or approved

1718

2288

time = datetime.datetime.now()

1719

2289

client.changedstate.acquire()

1720

(client.changedstate.wait

1721

(float(client.timedelta_to_milliseconds(delay)

1722

/ 1000)))

2290

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

1723

2291

client.changedstate.release()

1724

2292

time2 = datetime.datetime.now()

1725

2293

if (time2 - time) >= delay:

1735

2303

break

1736

2304

else:

1737

2305

delay -= time2 - time

1738

1739

sent_size = 0

1740

while sent_size < len(client.secret):

1741

try:

1742

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

1743

except gnutls.errors.GNUTLSError as error:

1744

logger.warning("gnutls send failed")

1745

return

1746

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

1747

sent, len(client.secret)

1748

- (sent_size + sent))

1749

sent_size += sent

1750

2306

2307

try:

2308

session.send(client.secret)

2309

except gnutls.Error as error:

2310

logger.warning("gnutls send failed",

2311

exc_info=error)

2312

return

2313

1751

2314

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

1752

2315

# bump the timeout using extended_timeout

1753

2316

client.bump_timeout(client.extended_timeout)

1754

2317

if self.server.use_dbus:

1755

2318

# Emit D-Bus signal

1756

2319

client.GotSecret()

1757

2320

1758

2321

finally:

1759

2322

if approval_required:

1760

2323

client.approvals_pending -= 1

1761

2324

try:

1762

2325

session.bye()

1763

except gnutls.errors.GNUTLSError as error:

1764

logger.warning("GnuTLS bye failed")

1765

2326

except gnutls.Error as error:

2327

logger.warning("GnuTLS bye failed",

2328

exc_info=error)

2329

1766

2330

@staticmethod

1767

2331

def peer_certificate(session):

1768

2332

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

1769

2333

# If not an OpenPGP certificate...

1770

if (gnutls.library.functions

1771

.gnutls_certificate_type_get(session._c_object)

1772

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1773

# ...do the normal thing

1774

return session.peer_certificate

2334

if (gnutls.certificate_type_get(session._c_object)

2335

!= gnutls.CRT_OPENPGP):

2336

# ...return invalid data

2337

return b""

1775

2338

list_size = ctypes.c_uint(1)

1776

cert_list = (gnutls.library.functions

1777

.gnutls_certificate_get_peers

2339

cert_list = (gnutls.certificate_get_peers

1778

2340

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

1779

2341

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

1780

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

1781

" certificate")

2342

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

1782

2343

if list_size.value == 0:

1783

2344

return None

1784

2345

cert = cert_list[0]

1785

2346

return ctypes.string_at(cert.data, cert.size)

1786

2347

1787

2348

@staticmethod

1788

2349

def fingerprint(openpgp):

1789

2350

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1790

2351

# New GnuTLS "datum" with the OpenPGP public key

1791

datum = (gnutls.library.types

1792

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

1793

ctypes.POINTER

1794

(ctypes.c_ubyte)),

1795

ctypes.c_uint(len(openpgp))))

2352

datum = gnutls.datum_t(

2353

ctypes.cast(ctypes.c_char_p(openpgp),

2354

ctypes.POINTER(ctypes.c_ubyte)),

2355

ctypes.c_uint(len(openpgp)))

1796

2356

# New empty GnuTLS certificate

1797

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1798

(gnutls.library.functions

1799

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2357

crt = gnutls.openpgp_crt_t()

2358

gnutls.openpgp_crt_init(ctypes.byref(crt))

1800

2359

# Import the OpenPGP public key into the certificate

1801

(gnutls.library.functions

1802

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

1803

gnutls.library.constants

1804

.GNUTLS_OPENPGP_FMT_RAW))

2360

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

2361

gnutls.OPENPGP_FMT_RAW)

1805

2362

# Verify the self signature in the key

1806

2363

crtverify = ctypes.c_uint()

1807

(gnutls.library.functions

1808

.gnutls_openpgp_crt_verify_self(crt, 0,

1809

ctypes.byref(crtverify)))

2364

gnutls.openpgp_crt_verify_self(crt, 0,

2365

ctypes.byref(crtverify))

1810

2366

if crtverify.value != 0:

1811

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1812

raise (gnutls.errors.CertificateSecurityError

1813

("Verify failed"))

2367

gnutls.openpgp_crt_deinit(crt)

2368

raise gnutls.CertificateSecurityError(code

2369

=crtverify.value)

1814

2370

# New buffer for the fingerprint

1815

2371

buf = ctypes.create_string_buffer(20)

1816

2372

buf_len = ctypes.c_size_t()

1817

2373

# Get the fingerprint from the certificate into the buffer

1818

(gnutls.library.functions

1819

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

1820

ctypes.byref(buf_len)))

2374

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

2375

ctypes.byref(buf_len))

1821

2376

# Deinit the certificate

1822

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2377

gnutls.openpgp_crt_deinit(crt)

1823

2378

# Convert the buffer to a Python bytestring

1824

2379

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

1825

2380

# Convert the bytestring to hexadecimal notation

1829

2384

1830

2385

class MultiprocessingMixIn(object):

1831

2386

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

2387

1832

2388

def sub_process_main(self, request, address):

1833

2389

try:

1834

2390

self.finish_request(request, address)

1835

2391

except Exception:

1836

2392

self.handle_error(request, address)

1837

2393

self.close_request(request)

1838

2394

1839

2395

def process_request(self, request, address):

1840

2396

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

1841

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

1842

args = (request,

1843

address))

2397

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

2398

args=(request, address))

1844

2399

proc.start()

1845

2400

return proc

1846

2401

1847

2402

1848

2403

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1849

2404

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

2405

1850

2406

def process_request(self, request, client_address):

1851

2407

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

1852

2408

1853

2409

This function creates a new pipe in self.pipe

1854

2410

"""

1855

2411

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1856

2412

1857

2413

proc = MultiprocessingMixIn.process_request(self, request,

1858

2414

client_address)

1859

2415

self.child_pipe.close()

1860

2416

self.add_pipe(parent_pipe, proc)

1861

2417

1862

2418

def add_pipe(self, parent_pipe, proc):

1863

2419

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

1864

raise NotImplementedError

2420

raise NotImplementedError()

1865

2421

1866

2422

1867

2423

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1868

2424

socketserver.TCPServer, object):

1869

2425

"""IPv6-capable TCP server. Accepts 'None' as address and/or port

1870

2426

1871

2427

Attributes:

1872

2428

enabled: Boolean; whether this server is activated yet

1873

2429

interface: None or a network interface name (string)

1874

2430

use_ipv6: Boolean; to use IPv6 or not

1875

2431

"""

2432

1876

2433

def __init__(self, server_address, RequestHandlerClass,

1877

interface=None, use_ipv6=True):

2434

interface=None,

2435

use_ipv6=True,

2436

socketfd=None):

2437

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

2438

creating a new one with socket.socket().

2439

"""

1878

2440

self.interface = interface

1879

2441

if use_ipv6:

1880

2442

self.address_family = socket.AF_INET6

2443

if socketfd is not None:

2444

# Save the file descriptor

2445

self.socketfd = socketfd

2446

# Save the original socket.socket() function

2447

self.socket_socket = socket.socket

2448

2449

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

2450

#

2451

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

2452

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

2453

# patching socket.socket.)

2454

#

2455

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

2456

@functools.wraps(socket.socket)

2457

def socket_wrapper(*args, **kwargs):

2458

# Restore original function so subsequent calls are

2459

# not affected.

2460

socket.socket = self.socket_socket

2461

del self.socket_socket

2462

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

2463

# saved file descriptor.

2464

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

2465

# Replace socket.socket() function with wrapper

2466

socket.socket = socket_wrapper

2467

# The socketserver.TCPServer.__init__ will call

2468

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

2469

# socket_wrapper(), if socketfd was set.

1881

2470

socketserver.TCPServer.__init__(self, server_address,

1882

2471

RequestHandlerClass)

2472

1883

2473

def server_bind(self):

1884

2474

"""This overrides the normal server_bind() function

1885

2475

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

1886

2476

bind to an address or port if they were not specified."""

2477

global SO_BINDTODEVICE

1887

2478

if self.interface is not None:

1888

2479

if SO_BINDTODEVICE is None:

1889

logger.error("SO_BINDTODEVICE does not exist;"

1890

" cannot bind to interface %s",

1891

self.interface)

1892

else:

1893

try:

1894

self.socket.setsockopt(socket.SOL_SOCKET,

1895

SO_BINDTODEVICE,

1896

str(self.interface

1897

+ '\0'))

1898

except socket.error as error:

1899

if error[0] == errno.EPERM:

1900

logger.error("No permission to"

1901

" bind to interface %s",

1902

self.interface)

1903

elif error[0] == errno.ENOPROTOOPT:

1904

logger.error("SO_BINDTODEVICE not available;"

1905

" cannot bind to interface %s",

1906

self.interface)

1907

else:

1908

raise

2480

# Fall back to a hard-coded value which seems to be

2481

# common enough.

2482

logger.warning("SO_BINDTODEVICE not found, trying 25")

2483

SO_BINDTODEVICE = 25

2484

try:

2485

self.socket.setsockopt(

2486

socket.SOL_SOCKET, SO_BINDTODEVICE,

2487

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

2488

except socket.error as error:

2489

if error.errno == errno.EPERM:

2490

logger.error("No permission to bind to"

2491

" interface %s", self.interface)

2492

elif error.errno == errno.ENOPROTOOPT:

2493

logger.error("SO_BINDTODEVICE not available;"

2494

" cannot bind to interface %s",

2495

self.interface)

2496

elif error.errno == errno.ENODEV:

2497

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

2498

" cannot bind", self.interface)

2499

else:

2500

raise

1909

2501

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

1910

2502

if self.server_address[0] or self.server_address[1]:

1911

2503

if not self.server_address[0]:

1912

2504

if self.address_family == socket.AF_INET6:

1913

any_address = "::" # in6addr_any

2505

any_address = "::" # in6addr_any

1914

2506

else:

1915

any_address = socket.INADDR_ANY

2507

any_address = "0.0.0.0" # INADDR_ANY

1916

2508

self.server_address = (any_address,

1917

2509

self.server_address[1])

1918

2510

elif not self.server_address[1]:

1919

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

1920

0)

2511

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

1921

2512

# if self.interface:

1922

2513

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

1923

2514

# 0, # port

1929

2520

1930

2521

class MandosServer(IPv6_TCPServer):

1931

2522

"""Mandos server.

1932

2523

1933

2524

Attributes:

1934

2525

clients: set of Client objects

1935

2526

gnutls_priority GnuTLS priority string

1936

2527

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

1937

1938

Assumes a gobject.MainLoop event loop.

2528

2529

Assumes a GLib.MainLoop event loop.

1939

2530

"""

2531

1940

2532

def __init__(self, server_address, RequestHandlerClass,

1941

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

1942

gnutls_priority=None, use_dbus=True):

2533

interface=None,

2534

use_ipv6=True,

2535

clients=None,

2536

gnutls_priority=None,

2537

use_dbus=True,

2538

socketfd=None):

1943

2539

self.enabled = False

1944

2540

self.clients = clients

1945

2541

if self.clients is None:

1948

2544

self.gnutls_priority = gnutls_priority

1949

2545

IPv6_TCPServer.__init__(self, server_address,

1950

2546

RequestHandlerClass,

1951

interface = interface,

1952

use_ipv6 = use_ipv6)

2547

interface=interface,

2548

use_ipv6=use_ipv6,

2549

socketfd=socketfd)

2550

1953

2551

def server_activate(self):

1954

2552

if self.enabled:

1955

2553

return socketserver.TCPServer.server_activate(self)

1956

2554

1957

2555

def enable(self):

1958

2556

self.enabled = True

1959

2557

1960

2558

def add_pipe(self, parent_pipe, proc):

1961

2559

# Call "handle_ipc" for both data and EOF events

1962

gobject.io_add_watch(parent_pipe.fileno(),

1963

gobject.IO_IN | gobject.IO_HUP,

1964

functools.partial(self.handle_ipc,

1965

parent_pipe =

1966

parent_pipe,

1967

proc = proc))

1968

1969

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

1970

proc = None, client_object=None):

1971

condition_names = {

1972

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

1973

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

1974

# blocking).

1975

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

1976

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

1977

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

1978

# broken, usually for pipes and

1979

# sockets).

1980

}

1981

conditions_string = ' | '.join(name

1982

for cond, name in

1983

condition_names.iteritems()

1984

if cond & condition)

2560

GLib.io_add_watch(

2561

parent_pipe.fileno(),

2562

GLib.IO_IN | GLib.IO_HUP,

2563

functools.partial(self.handle_ipc,

2564

parent_pipe=parent_pipe,

2565

proc=proc))

2566

2567

def handle_ipc(self, source, condition,

2568

parent_pipe=None,

2569

proc=None,

2570

client_object=None):

1985

2571

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

1986

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

2572

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

1987

2573

# Wait for other process to exit

1988

2574

proc.join()

1989

2575

return False

1990

2576

1991

2577

# Read a request from the child

1992

2578

request = parent_pipe.recv()

1993

2579

command = request[0]

1994

2580

1995

2581

if command == 'init':

1996

fpr = request[1]

2582

fpr = request[1].decode("ascii")

1997

2583

address = request[2]

1998

1999

for c in self.clients.itervalues():

2584

2585

for c in self.clients.values():

2000

2586

if c.fingerprint == fpr:

2001

2587

client = c

2002

2588

break

2009

2595

address[0])

2010

2596

parent_pipe.send(False)

2011

2597

return False

2012

2013

gobject.io_add_watch(parent_pipe.fileno(),

2014

gobject.IO_IN | gobject.IO_HUP,

2015

functools.partial(self.handle_ipc,

2016

parent_pipe =

2017

parent_pipe,

2018

proc = proc,

2019

client_object =

2020

client))

2598

2599

GLib.io_add_watch(

2600

parent_pipe.fileno(),

2601

GLib.IO_IN | GLib.IO_HUP,

2602

functools.partial(self.handle_ipc,

2603

parent_pipe=parent_pipe,

2604

proc=proc,

2605

client_object=client))

2021

2606

parent_pipe.send(True)

2022

2607

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

2023

2608

# same fileno

2026

2611

funcname = request[1]

2027

2612

args = request[2]

2028

2613

kwargs = request[3]

2029

2614

2030

2615

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

2031

2616

funcname)(*args,

2032

**kwargs)))

2033

2617

**kwargs)))

2618

2034

2619

if command == 'getattr':

2035

2620

attrname = request[1]

2036

if callable(client_object.__getattribute__(attrname)):

2037

parent_pipe.send(('function',))

2621

if isinstance(client_object.__getattribute__(attrname),

2622

collections.Callable):

2623

parent_pipe.send(('function', ))

2038

2624

else:

2039

parent_pipe.send(('data', client_object

2040

.__getattribute__(attrname)))

2041

2625

parent_pipe.send((

2626

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

2627

2042

2628

if command == 'setattr':

2043

2629

attrname = request[1]

2044

2630

value = request[2]

2045

2631

setattr(client_object, attrname, value)

2046

2632

2047

2633

return True

2048

2634

2049

2635

2636

def rfc3339_duration_to_delta(duration):

2637

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

2638

2639

>>> rfc3339_duration_to_delta("P7D")

2640

datetime.timedelta(7)

2641

>>> rfc3339_duration_to_delta("PT60S")

2642

datetime.timedelta(0, 60)

2643

>>> rfc3339_duration_to_delta("PT60M")

2644

datetime.timedelta(0, 3600)

2645

>>> rfc3339_duration_to_delta("PT24H")

2646

datetime.timedelta(1)

2647

>>> rfc3339_duration_to_delta("P1W")

2648

datetime.timedelta(7)

2649

>>> rfc3339_duration_to_delta("PT5M30S")

2650

datetime.timedelta(0, 330)

2651

>>> rfc3339_duration_to_delta("P1DT3M20S")

2652

datetime.timedelta(1, 200)

2653

"""

2654

2655

# Parsing an RFC 3339 duration with regular expressions is not

2656

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

2657

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

2658

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

2659

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

2660

# avoid excessive use of external libraries.

2661

2662

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

2663

Token = collections.namedtuple("Token", (

2664

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

2665

# a "group" containing digits

2666

"value", # datetime.timedelta or None

2667

"followers")) # Tokens valid after this token

2668

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

2669

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

2670

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

2671

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

2672

datetime.timedelta(seconds=1),

2673

frozenset((token_end, )))

2674

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

2675

datetime.timedelta(minutes=1),

2676

frozenset((token_second, token_end)))

2677

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

2678

datetime.timedelta(hours=1),

2679

frozenset((token_minute, token_end)))

2680

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

2681

None,

2682

frozenset((token_hour, token_minute,

2683

token_second)))

2684

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

2685

datetime.timedelta(days=1),

2686

frozenset((token_time, token_end)))

2687

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

2688

datetime.timedelta(weeks=4),

2689

frozenset((token_day, token_end)))

2690

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

2691

datetime.timedelta(weeks=52),

2692

frozenset((token_month, token_end)))

2693

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

2694

datetime.timedelta(weeks=1),

2695

frozenset((token_end, )))

2696

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

2697

frozenset((token_year, token_month,

2698

token_day, token_time,

2699

token_week)))

2700

# Define starting values:

2701

# Value so far

2702

value = datetime.timedelta()

2703

found_token = None

2704

# Following valid tokens

2705

followers = frozenset((token_duration, ))

2706

# String left to parse

2707

s = duration

2708

# Loop until end token is found

2709

while found_token is not token_end:

2710

# Search for any currently valid tokens

2711

for token in followers:

2712

match = token.regexp.match(s)

2713

if match is not None:

2714

# Token found

2715

if token.value is not None:

2716

# Value found, parse digits

2717

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

2718

# Add to value so far

2719

value += factor * token.value

2720

# Strip token from string

2721

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

2722

# Go to found token

2723

found_token = token

2724

# Set valid next tokens

2725

followers = found_token.followers

2726

break

2727

else:

2728

# No currently valid tokens were found

2729

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

2730

.format(duration))

2731

# End token found

2732

return value

2733

2734

2050

2735

def string_to_delta(interval):

2051

2736

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

2052

2737

2053

2738

>>> string_to_delta('7d')

2054

2739

datetime.timedelta(7)

2055

2740

>>> string_to_delta('60s')

2063

2748

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

2064

2749

datetime.timedelta(0, 330)

2065

2750

"""

2751

2752

try:

2753

return rfc3339_duration_to_delta(interval)

2754

except ValueError:

2755

pass

2756

2066

2757

timevalue = datetime.timedelta(0)

2067

2758

for s in interval.split():

2068

2759

try:

2069

suffix = unicode(s[-1])

2760

suffix = s[-1]

2070

2761

value = int(s[:-1])

2071

2762

if suffix == "d":

2072

2763

delta = datetime.timedelta(value)

2079

2770

elif suffix == "w":

2080

2771

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

2081

2772

else:

2082

raise ValueError("Unknown suffix {0!r}"

2083

.format(suffix))

2084

except (ValueError, IndexError) as e:

2773

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

2774

except IndexError as e:

2085

2775

raise ValueError(*(e.args))

2086

2776

timevalue += delta

2087

2777

return timevalue

2088

2778

2089

2779

2090

def daemon(nochdir = False, noclose = False):

2780

def daemon(nochdir=False, noclose=False):

2091

2781

"""See daemon(3). Standard BSD Unix function.

2092

2782

2093

2783

This should really exist as os.daemon, but it doesn't (yet)."""

2094

2784

if os.fork():

2095

2785

sys.exit()

2103

2793

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

2104

2794

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

2105

2795

raise OSError(errno.ENODEV,

2106

"{0} not a character device"

2796

"{} not a character device"

2107

2797

.format(os.devnull))

2108

2798

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

2109

2799

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

2113

2803

2114

2804

2115

2805

def main():

2116

2806

2117

2807

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

2118

2808

# Parsing of options, both command line and config file

2119

2809

2120

2810

parser = argparse.ArgumentParser()

2121

2811

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

2122

version = "%(prog)s {0}".format(version),

2812

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

2123

2813

help="show version number and exit")

2124

2814

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

2125

2815

help="Bind to interface IF")

2131

2821

help="Run self-test")

2132

2822

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

2133

2823

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

2134

" to terminal")

2824

" to terminal", default=None)

2135

2825

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

2136

2826

help="Debug level for stdout output")

2137

2827

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

2144

2834

" files")

2145

2835

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

2146

2836

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

2147

" system bus interface")

2837

" system bus interface", default=None)

2148

2838

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

2149

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

2839

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

2840

default=None)

2150

2841

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

2151

2842

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

2152

" state")

2843

" state", default=None)

2844

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

2845

help="Specify a file descriptor to a network"

2846

" socket to use instead of creating one")

2153

2847

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

2154

2848

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

2155

2849

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

2850

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

2851

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

2852

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

2853

default=None)

2854

2156

2855

options = parser.parse_args()

2157

2856

2158

2857

if options.check:

2159

2858

import doctest

2160

doctest.testmod()

2161

sys.exit()

2162

2859

fail_count, test_count = doctest.testmod()

2860

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

2861

2163

2862

# Default values for config file for server-global settings

2164

server_defaults = { "interface": "",

2165

"address": "",

2166

"port": "",

2167

"debug": "False",

2168

"priority":

2169

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

2170

"servicename": "Mandos",

2171

"use_dbus": "True",

2172

"use_ipv6": "True",

2173

"debuglevel": "",

2174

"restore": "True",

2175

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

2176

}

2177

2863

server_defaults = {"interface": "",

2864

"address": "",

2865

"port": "",

2866

"debug": "False",

2867

"priority":

2868

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

2869

":+SIGN-DSA-SHA256",

2870

"servicename": "Mandos",

2871

"use_dbus": "True",

2872

"use_ipv6": "True",

2873

"debuglevel": "",

2874

"restore": "True",

2875

"socket": "",

2876

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

2877

"foreground": "False",

2878

"zeroconf": "True",

2879

}

2880

2178

2881

# Parse config file for server-global settings

2179

2882

server_config = configparser.SafeConfigParser(server_defaults)

2180

2883

del server_defaults

2181

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

2182

"mandos.conf"))

2884

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

2183

2885

# Convert the SafeConfigParser object to a dict

2184

2886

server_settings = server_config.defaults()

2185

2887

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

2186

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

2888

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

2889

"foreground", "zeroconf"):

2187

2890

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

2188

2891

option)

2189

2892

if server_settings["port"]:

2190

2893

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

2191

2894

"port")

2895

if server_settings["socket"]:

2896

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

2897

"socket")

2898

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

2899

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

2900

# happen with a supplied network socket.

2901

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

2902

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

2903

["socket"])

2192

2904

del server_config

2193

2905

2194

2906

# Override the settings from the config file with command line

2195

2907

# options, if set.

2196

2908

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

2197

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

2198

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

2199

"statedir"):

2909

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

2910

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

2911

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

2200

2912

value = getattr(options, option)

2201

2913

if value is not None:

2202

2914

server_settings[option] = value

2203

2915

del options

2204

2916

# Force all strings to be unicode

2205

2917

for option in server_settings.keys():

2206

if type(server_settings[option]) is str:

2207

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

2918

if isinstance(server_settings[option], bytes):

2919

server_settings[option] = (server_settings[option]

2920

.decode("utf-8"))

2921

# Force all boolean options to be boolean

2922

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

2923

"foreground", "zeroconf"):

2924

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

2925

# Debug implies foreground

2926

if server_settings["debug"]:

2927

server_settings["foreground"] = True

2208

2928

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

2209

2929

2210

2930

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

2211

2931

2932

if (not server_settings["zeroconf"]

2933

and not (server_settings["port"]

2934

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

2935

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

2936

2212

2937

# For convenience

2213

2938

debug = server_settings["debug"]

2214

2939

debuglevel = server_settings["debuglevel"]

2216

2941

use_ipv6 = server_settings["use_ipv6"]

2217

2942

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

2218

2943

stored_state_file)

2219

2944

foreground = server_settings["foreground"]

2945

zeroconf = server_settings["zeroconf"]

2946

2220

2947

if debug:

2221

2948

initlogger(debug, logging.DEBUG)

2222

2949

else:

2225

2952

else:

2226

2953

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

2227

2954

initlogger(debug, level)

2228

2955

2229

2956

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

2230

syslogger.setFormatter(logging.Formatter

2231

('Mandos ({0}) [%(process)d]:'

2232

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

2233

.format(server_settings

2234

["servicename"])))

2235

2957

syslogger.setFormatter(

2958

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

2959

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

2960

server_settings["servicename"])))

2961

2236

2962

# Parse config file with clients

2237

2963

client_config = configparser.SafeConfigParser(Client

2238

2964

.client_defaults)

2239

2965

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

2240

2966

"clients.conf"))

2241

2967

2242

2968

global mandos_dbus_service

2243

2969

mandos_dbus_service = None

2244

2245

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

2246

server_settings["port"]),

2247

ClientHandler,

2248

interface=(server_settings["interface"]

2249

or None),

2250

use_ipv6=use_ipv6,

2251

gnutls_priority=

2252

server_settings["priority"],

2253

use_dbus=use_dbus)

2254

if not debug:

2255

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

2970

2971

socketfd = None

2972

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

2973

socketfd = server_settings["socket"]

2974

tcp_server = MandosServer(

2975

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

2976

ClientHandler,

2977

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

2978

use_ipv6=use_ipv6,

2979

gnutls_priority=server_settings["priority"],

2980

use_dbus=use_dbus,

2981

socketfd=socketfd)

2982

if not foreground:

2983

pidfilename = "/run/mandos.pid"

2984

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

2985

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

2986

pidfile = None

2256

2987

try:

2257

pidfile = open(pidfilename, "w")

2258

except IOError:

2259

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

2260

2261

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

2988

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

2989

except IOError as e:

2990

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

2991

exc_info=e)

2992

2993

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

2994

("mandos", "mandos"),

2995

("nobody", "nogroup")):

2262

2996

try:

2263

2997

uid = pwd.getpwnam(name).pw_uid

2264

gid = pwd.getpwnam(name).pw_gid

2998

gid = pwd.getpwnam(group).pw_gid

2265

2999

break

2266

3000

except KeyError:

2267

3001

continue

2271

3005

try:

2272

3006

os.setgid(gid)

2273

3007

os.setuid(uid)

3008

if debug:

3009

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

3010

gid))

2274

3011

except OSError as error:

2275

if error[0] != errno.EPERM:

2276

raise error

2277

3012

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

3013

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

3014

if error.errno != errno.EPERM:

3015

raise

3016

2278

3017

if debug:

2279

3018

# Enable all possible GnuTLS debugging

2280

3019

2281

3020

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

2282

3021

# - GnuTLS manual

2283

gnutls.library.functions.gnutls_global_set_log_level(11)

2284

2285

@gnutls.library.types.gnutls_log_func

3022

gnutls.global_set_log_level(11)

3023

3024

@gnutls.log_func

2286

3025

def debug_gnutls(level, string):

2287

3026

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

2288

2289

(gnutls.library.functions

2290

.gnutls_global_set_log_function(debug_gnutls))

2291

3027

3028

gnutls.global_set_log_function(debug_gnutls)

3029

2292

3030

# Redirect stdin so all checkers get /dev/null

2293

3031

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

2294

3032

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

2295

3033

if null > 2:

2296

3034

os.close(null)

2297

3035

2298

3036

# Need to fork before connecting to D-Bus

2299

if not debug:

3037

if not foreground:

2300

3038

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

2301

3039

daemon()

2302

2303

gobject.threads_init()

2304

3040

3041

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

3042

# to inform GLib that threads will be used.

3043

GLib.threads_init()

3044

2305

3045

global main_loop

2306

3046

# From the Avahi example code

2307

3047

DBusGMainLoop(set_as_default=True)

2308

main_loop = gobject.MainLoop()

3048

main_loop = GLib.MainLoop()

2309

3049

bus = dbus.SystemBus()

2310

3050

# End of Avahi example code

2311

3051

if use_dbus:

2312

3052

try:

2313

3053

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

2314

bus, do_not_queue=True)

2315

old_bus_name = (dbus.service.BusName

2316

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

2317

do_not_queue=True))

2318

except dbus.exceptions.NameExistsException as e:

2319

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

3054

bus,

3055

do_not_queue=True)

3056

old_bus_name = dbus.service.BusName(

3057

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

3058

do_not_queue=True)

3059

except dbus.exceptions.DBusException as e:

3060

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

2320

3061

use_dbus = False

2321

3062

server_settings["use_dbus"] = False

2322

3063

tcp_server.use_dbus = False

2323

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2324

service = AvahiServiceToSyslog(name =

2325

server_settings["servicename"],

2326

servicetype = "_mandos._tcp",

2327

protocol = protocol, bus = bus)

2328

if server_settings["interface"]:

2329

service.interface = (if_nametoindex

2330

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

2331

3064

if zeroconf:

3065

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3066

service = AvahiServiceToSyslog(

3067

name=server_settings["servicename"],

3068

servicetype="_mandos._tcp",

3069

protocol=protocol,

3070

bus=bus)

3071

if server_settings["interface"]:

3072

service.interface = if_nametoindex(

3073

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

3074

2332

3075

global multiprocessing_manager

2333

3076

multiprocessing_manager = multiprocessing.Manager()

2334

3077

2335

3078

client_class = Client

2336

3079

if use_dbus:

2337

client_class = functools.partial(ClientDBusTransitional,

2338

bus = bus)

2339

3080

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

3081

2340

3082

client_settings = Client.config_parser(client_config)

2341

3083

old_client_settings = {}

2342

3084

clients_data = {}

2343

3085

3086

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

3087

global wnull

3088

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

3089

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

3090

# mode

3091

if debug or not foreground:

3092

wnull.close()

3093

2344

3094

# Get client data and settings from last running state.

2345

3095

if server_settings["restore"]:

2346

3096

try:

2347

3097

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

2348

clients_data, old_client_settings = (pickle.load

2349

(stored_state))

3098

if sys.version_info.major == 2:

3099

clients_data, old_client_settings = pickle.load(

3100

stored_state)

3101

else:

3102

bytes_clients_data, bytes_old_client_settings = (

3103

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

3104

# Fix bytes to strings

3105

# clients_data

3106

# .keys()

3107

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

3108

if isinstance(key, bytes)

3109

else key): value

3110

for key, value in

3111

bytes_clients_data.items()}

3112

del bytes_clients_data

3113

for key in clients_data:

3114

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

3115

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

3116

for k, v in

3117

clients_data[key].items()}

3118

clients_data[key] = value

3119

# .client_structure

3120

value["client_structure"] = [

3121

(s.decode("utf-8")

3122

if isinstance(s, bytes)

3123

else s) for s in

3124

value["client_structure"]]

3125

# .name & .host

3126

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

3127

if isinstance(value[k], bytes):

3128

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

3129

# old_client_settings

3130

# .keys()

3131

old_client_settings = {

3132

(key.decode("utf-8")

3133

if isinstance(key, bytes)

3134

else key): value

3135

for key, value in

3136

bytes_old_client_settings.items()}

3137

del bytes_old_client_settings

3138

# .host

3139

for value in old_client_settings.values():

3140

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

3141

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

3142

.decode("utf-8"))

2350

3143

os.remove(stored_state_path)

2351

3144

except IOError as e:

2352

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

2353

.format(e))

2354

if e.errno != errno.ENOENT:

3145

if e.errno == errno.ENOENT:

3146

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

3147

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

3148

else:

3149

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

3150

exc_info=e)

2355

3151

raise

2356

3152

except EOFError as e:

2357

3153

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

2358

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

2359

3154

"EOFError:",

3155

exc_info=e)

3156

2360

3157

with PGPEngine() as pgp:

2361

for client_name, client in clients_data.iteritems():

3158

for client_name, client in clients_data.items():

3159

# Skip removed clients

3160

if client_name not in client_settings:

3161

continue

3162

2362

3163

# Decide which value to use after restoring saved state.

2363

3164

# We have three different values: Old config file,

2364

3165

# new config file, and saved state.

2369

3170

# For each value in new config, check if it

2370

3171

# differs from the old config value (Except for

2371

3172

# the "secret" attribute)

2372

if (name != "secret" and

2373

value != old_client_settings[client_name]

2374

[name]):

3173

if (name != "secret"

3174

and (value !=

3175

old_client_settings[client_name][name])):

2375

3176

client[name] = value

2376

3177

except KeyError:

2377

3178

pass

2378

3179

2379

3180

# Clients who has passed its expire date can still be

2380

# enabled if its last checker was successful. Clients

3181

# enabled if its last checker was successful. A Client

2381

3182

# whose checker succeeded before we stored its state is

2382

3183

# assumed to have successfully run all checkers during

2383

3184

# downtime.

2385

3186

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

2386

3187

if not client["last_checked_ok"]:

2387

3188

logger.warning(

2388

"disabling client {0} - Client never "

2389

"performed a successful checker"

2390

.format(client_name))

3189

"disabling client {} - Client never "

3190

"performed a successful checker".format(

3191

client_name))

2391

3192

client["enabled"] = False

2392

3193

elif client["last_checker_status"] != 0:

2393

3194

logger.warning(

2394

"disabling client {0} - Client "

2395

"last checker failed with error code {1}"

2396

.format(client_name,

2397

client["last_checker_status"]))

3195

"disabling client {} - Client last"

3196

" checker failed with error code"

3197

" {}".format(

3198

client_name,

3199

client["last_checker_status"]))

2398

3200

client["enabled"] = False

2399

3201

else:

2400

client["expires"] = (datetime.datetime

2401

.utcnow()

2402

+ client["timeout"])

3202

client["expires"] = (

3203

datetime.datetime.utcnow()

3204

+ client["timeout"])

2403

3205

logger.debug("Last checker succeeded,"

2404

" keeping {0} enabled"

2405

.format(client_name))

3206

" keeping {} enabled".format(

3207

client_name))

2406

3208

try:

2407

client["secret"] = (

2408

pgp.decrypt(client["encrypted_secret"],

2409

client_settings[client_name]

2410

["secret"]))

3209

client["secret"] = pgp.decrypt(

3210

client["encrypted_secret"],

3211

client_settings[client_name]["secret"])

2411

3212

except PGPError:

2412

3213

# If decryption fails, we use secret from new settings

2413

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

2414

.format(client_name))

2415

client["secret"] = (

2416

client_settings[client_name]["secret"])

3214

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

3215

client_name))

3216

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

3217

["secret"])

2417

3218

2418

2419

3219

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

2420

3220

for client_name in (set(old_client_settings)

2421

3221

- set(client_settings)):

2425

3225

clients_data[client_name] = client_settings[client_name]

2426

3226

2427

3227

# Create all client objects

2428

for client_name, client in clients_data.iteritems():

3228

for client_name, client in clients_data.items():

2429

3229

tcp_server.clients[client_name] = client_class(

2430

name = client_name, settings = client)

2431

3230

name=client_name,

3231

settings=client,

3232

server_settings=server_settings)

3233

2432

3234

if not tcp_server.clients:

2433

3235

logger.warning("No clients defined")

2434

2435

if not debug:

2436

try:

2437

with pidfile:

2438

pid = os.getpid()

2439

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

2440

del pidfile

2441

except IOError:

2442

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

2443

pidfilename, pid)

2444

except NameError:

2445

# "pidfile" was never created

2446

pass

3236

3237

if not foreground:

3238

if pidfile is not None:

3239

pid = os.getpid()

3240

try:

3241

with pidfile:

3242

print(pid, file=pidfile)

3243

except IOError:

3244

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

3245

pidfilename, pid)

3246

del pidfile

2447

3247

del pidfilename

2448

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

2449

2450

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

2451

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

2452

3248

3249

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

3250

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3251

lambda: main_loop.quit() and False)

3252

2453

3253

if use_dbus:

2454

class MandosDBusService(DBusObjectWithProperties):

3254

3255

@alternate_dbus_interfaces(

3256

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

3257

class MandosDBusService(DBusObjectWithObjectManager):

2455

3258

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

3259

2456

3260

def __init__(self):

2457

3261

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

3262

2458

3263

_interface = "se.recompile.Mandos"

2459

2460

@dbus_interface_annotations(_interface)

2461

def _foo(self):

2462

return { "org.freedesktop.DBus.Property"

2463

".EmitsChangedSignal":

2464

"false"}

2465

3264

2466

3265

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

2467

3266

def ClientAdded(self, objpath):

2468

3267

"D-Bus signal"

2469

3268

pass

2470

3269

2471

3270

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

2472

3271

def ClientNotFound(self, fingerprint, address):

2473

3272

"D-Bus signal"

2474

3273

pass

2475

3274

3275

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

3276

"true"})

2476

3277

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

2477

3278

def ClientRemoved(self, objpath, name):

2478

3279

"D-Bus signal"

2479

3280

pass

2480

3281

3282

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

3283

"true"})

2481

3284

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

2482

3285

def GetAllClients(self):

2483

3286

"D-Bus method"

2484

return dbus.Array(c.dbus_object_path

2485

for c in

2486

tcp_server.clients.itervalues())

2487

3287

return dbus.Array(c.dbus_object_path for c in

3288

tcp_server.clients.values())

3289

3290

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

3291

"true"})

2488

3292

@dbus.service.method(_interface,

2489

3293

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

2490

3294

def GetAllClientsWithProperties(self):

2491

3295

"D-Bus method"

2492

3296

return dbus.Dictionary(

2493

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

2494

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

3297

{c.dbus_object_path: c.GetAll(

3298

"se.recompile.Mandos.Client")

3299

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

2495

3300

signature="oa{sv}")

2496

3301

2497

3302

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

2498

3303

def RemoveClient(self, object_path):

2499

3304

"D-Bus method"

2500

for c in tcp_server.clients.itervalues():

3305

for c in tcp_server.clients.values():

2501

3306

if c.dbus_object_path == object_path:

2502

3307

del tcp_server.clients[c.name]

2503

3308

c.remove_from_connection()

2504

# Don't signal anything except ClientRemoved

3309

# Don't signal the disabling

2505

3310

c.disable(quiet=True)

2506

# Emit D-Bus signal

2507

self.ClientRemoved(object_path, c.name)

3311

# Emit D-Bus signal for removal

3312

self.client_removed_signal(c)

2508

3313

return

2509

3314

raise KeyError(object_path)

2510

3315

2511

3316

del _interface

2512

2513

class MandosDBusServiceTransitional(MandosDBusService):

2514

__metaclass__ = AlternateDBusNamesMetaclass

2515

mandos_dbus_service = MandosDBusServiceTransitional()

2516

3317

3318

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3319

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

3320

def GetManagedObjects(self):

3321

"""D-Bus method"""

3322

return dbus.Dictionary(

3323

{client.dbus_object_path:

3324

dbus.Dictionary(

3325

{interface: client.GetAll(interface)

3326

for interface in

3327

client._get_all_interface_names()})

3328

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

3329

3330

def client_added_signal(self, client):

3331

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

3332

if use_dbus:

3333

# New standard signal

3334

self.InterfacesAdded(

3335

client.dbus_object_path,

3336

dbus.Dictionary(

3337

{interface: client.GetAll(interface)

3338

for interface in

3339

client._get_all_interface_names()}))

3340

# Old signal

3341

self.ClientAdded(client.dbus_object_path)

3342

3343

def client_removed_signal(self, client):

3344

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

3345

if use_dbus:

3346

# New standard signal

3347

self.InterfacesRemoved(

3348

client.dbus_object_path,

3349

client._get_all_interface_names())

3350

# Old signal

3351

self.ClientRemoved(client.dbus_object_path,

3352

client.name)

3353

3354

mandos_dbus_service = MandosDBusService()

3355

3356

# Save modules to variables to exempt the modules from being

3357

# unloaded before the function registered with atexit() is run.

3358

mp = multiprocessing

3359

wn = wnull

3360

2517

3361

def cleanup():

2518

3362

"Cleanup function; run on exit"

2519

service.cleanup()

2520

2521

multiprocessing.active_children()

3363

if zeroconf:

3364

service.cleanup()

3365

3366

mp.active_children()

3367

wn.close()

2522

3368

if not (tcp_server.clients or client_settings):

2523

3369

return

2524

3370

2525

3371

# Store client before exiting. Secrets are encrypted with key

2526

3372

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

2527

3373

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

2528

3374

clients = {}

2529

3375

with PGPEngine() as pgp:

2530

for client in tcp_server.clients.itervalues():

3376

for client in tcp_server.clients.values():

2531

3377

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

2532

3378

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

2533

3379

key)

2534

3380

client_dict = {}

2535

3381

2536

3382

# A list of attributes that can not be pickled

2537

3383

# + secret.

2538

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

2539

"checker"))

2540

for name, typ in (inspect.getmembers

2541

(dbus.service.Object)):

3384

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

3385

"checker", "server_settings"}

3386

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

3387

.Object):

2542

3388

exclude.add(name)

2543

3389

2544

3390

client_dict["encrypted_secret"] = (client

2545

3391

.encrypted_secret)

2546

3392

for attr in client.client_structure:

2547

3393

if attr not in exclude:

2548

3394

client_dict[attr] = getattr(client, attr)

2549

3395

2550

3396

clients[client.name] = client_dict

2551

3397

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

2552

3398

2553

3399

try:

2554

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

2555

prefix="clients-",

2556

dir=os.path.dirname

2557

(stored_state_path))

2558

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

2559

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

3400

with tempfile.NamedTemporaryFile(

3401

mode='wb',

3402

suffix=".pickle",

3403

prefix='clients-',

3404

dir=os.path.dirname(stored_state_path),

3405

delete=False) as stored_state:

3406

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

3407

protocol=2)

3408

tempname = stored_state.name

2560

3409

os.rename(tempname, stored_state_path)

2561

3410

except (IOError, OSError) as e:

2562

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

2563

.format(e))

2564

3411

if not debug:

2565

3412

try:

2566

3413

os.remove(tempname)

2567

3414

except NameError:

2568

3415

pass

2569

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

2570

errno.EEXIST)):

2571

raise e

2572

3416

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

3417

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

3418

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

3419

else:

3420

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

3421

exc_info=e)

3422

raise

3423

2573

3424

# Delete all clients, and settings from config

2574

3425

while tcp_server.clients:

2575

3426

name, client = tcp_server.clients.popitem()

2576

3427

if use_dbus:

2577

3428

client.remove_from_connection()

2578

# Don't signal anything except ClientRemoved

3429

# Don't signal the disabling

2579

3430

client.disable(quiet=True)

3431

# Emit D-Bus signal for removal

2580

3432

if use_dbus:

2581

# Emit D-Bus signal

2582

mandos_dbus_service.ClientRemoved(client

2583

.dbus_object_path,

2584

client.name)

3433

mandos_dbus_service.client_removed_signal(client)

2585

3434

client_settings.clear()

2586

3435

2587

3436

atexit.register(cleanup)

2588

2589

for client in tcp_server.clients.itervalues():

3437

3438

for client in tcp_server.clients.values():

2590

3439

if use_dbus:

2591

# Emit D-Bus signal

2592

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3440

# Emit D-Bus signal for adding

3441

mandos_dbus_service.client_added_signal(client)

2593

3442

# Need to initiate checking of clients

2594

3443

if client.enabled:

2595

3444

client.init_checker()

2596

3445

2597

3446

tcp_server.enable()

2598

3447

tcp_server.server_activate()

2599

3448

2600

3449

# Find out what port we got

2601

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

3450

if zeroconf:

3451

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

2602

3452

if use_ipv6:

2603

3453

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

2604

3454

" flowinfo %d, scope_id %d",

2606

3456

else: # IPv4

2607

3457

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

2608

3458

*tcp_server.socket.getsockname())

2609

2610

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

2611

3459

3460

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

3461

2612

3462

try:

2613

# From the Avahi example code

2614

try:

2615

service.activate()

2616

except dbus.exceptions.DBusException as error:

2617

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

2618

cleanup()

2619

sys.exit(1)

2620

# End of Avahi example code

2621

2622

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

2623

lambda *args, **kwargs:

2624

(tcp_server.handle_request

2625

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

2626

3463

if zeroconf:

3464

# From the Avahi example code

3465

try:

3466

service.activate()

3467

except dbus.exceptions.DBusException as error:

3468

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

3469

cleanup()

3470

sys.exit(1)

3471

# End of Avahi example code

3472

3473

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

3474

lambda *args, **kwargs:

3475

(tcp_server.handle_request

3476

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

3477

2627

3478

logger.debug("Starting main loop")

2628

3479

main_loop.run()

2629

3480

except AvahiError as error:

2638

3489

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

2639

3490

cleanup()

2640

3491

3492

2641

3493

if __name__ == '__main__':

2642

3494

main()