/mandos/release : revision 237.7.699

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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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import gi

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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 = "1.5.1"

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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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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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version = "1.8.6"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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

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

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return interface_index

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def 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) as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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

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with open(os.devnull) as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class avahi(object):

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

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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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@staticmethod

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def string_array_to_txt_array(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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211

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class AvahiError(Exception):

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

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self.value = value

215

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

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def __unicode__(self):

217

return unicode(repr(self.value))

310

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

311

**kwargs)

312

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313

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class AvahiServiceError(AvahiError):

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315

pass

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class AvahiGroupError(AvahiError):

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pass

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321

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class AvahiService(object):

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323

"""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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341

"""

246

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

247

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):

342

343

def __init__(self,

344

interface=avahi.IF_UNSPEC,

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name=None,

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servicetype=None,

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port=None,

348

TXT=None,

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domain="",

350

host="",

351

max_renames=32768,

352

protocol=avahi.PROTO_UNSPEC,

353

bus=None):

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354

self.interface = interface

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355

self.name = name

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self.type = servicetype

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365

self.server = None

262

366

self.bus = bus

263

367

self.entry_group_state_changed_match = None

264

def rename(self):

368

369

def rename(self, remove=True):

265

370

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

266

371

if self.rename_count >= self.max_renames:

267

372

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

268

373

" after %i retries, exiting.",

269

374

self.rename_count)

270

375

raise AvahiServiceError("Too many renames")

271

self.name = unicode(self.server

272

.GetAlternativeServiceName(self.name))

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

378

self.rename_count += 1

273

379

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

274

380

self.name)

275

self.remove()

381

if remove:

382

self.remove()

276

383

try:

277

384

self.add()

278

385

except dbus.exceptions.DBusException as error:

279

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

280

self.cleanup()

281

os._exit(1)

282

self.rename_count += 1

386

if (error.get_dbus_name()

387

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

388

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

389

return self.rename(remove=False)

390

else:

391

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

392

self.cleanup()

393

os._exit(1)

394

283

395

def remove(self):

284

396

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

285

397

if self.entry_group_state_changed_match is not None:

287

399

self.entry_group_state_changed_match = None

288

400

if self.group is not None:

289

401

self.group.Reset()

402

290

403

def add(self):

291

404

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

292

405

self.remove()

309

422

dbus.UInt16(self.port),

310

423

avahi.string_array_to_txt_array(self.TXT))

311

424

self.group.Commit()

425

312

426

def entry_group_state_changed(self, state, error):

313

427

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

314

428

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

315

429

316

430

if state == avahi.ENTRY_GROUP_ESTABLISHED:

317

431

logger.debug("Zeroconf service established.")

318

432

elif state == avahi.ENTRY_GROUP_COLLISION:

320

434

self.rename()

321

435

elif state == avahi.ENTRY_GROUP_FAILURE:

322

436

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

323

unicode(error))

324

raise AvahiGroupError("State changed: %s"

325

% unicode(error))

437

str(error))

438

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

439

326

440

def cleanup(self):

327

441

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

328

442

if self.group is not None:

333

447

pass

334

448

self.group = None

335

449

self.remove()

450

336

451

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

337

452

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

338

453

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

339

bad_states = { avahi.SERVER_INVALID:

340

"Zeroconf server invalid",

341

avahi.SERVER_REGISTERING: None,

342

avahi.SERVER_COLLISION:

343

"Zeroconf server name collision",

344

avahi.SERVER_FAILURE:

345

"Zeroconf server failure" }

454

bad_states = {

455

avahi.SERVER_INVALID: "Zeroconf server invalid",

456

avahi.SERVER_REGISTERING: None,

457

avahi.SERVER_COLLISION: "Zeroconf server name collision",

458

avahi.SERVER_FAILURE: "Zeroconf server failure",

459

}

346

460

if state in bad_states:

347

461

if bad_states[state] is not None:

348

462

if error is None:

351

465

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

352

466

self.cleanup()

353

467

elif state == avahi.SERVER_RUNNING:

354

self.add()

468

try:

469

self.add()

470

except dbus.exceptions.DBusException as error:

471

if (error.get_dbus_name()

472

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

473

logger.info("Local Zeroconf service name"

474

" collision.")

475

return self.rename(remove=False)

476

else:

477

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

478

self.cleanup()

479

os._exit(1)

355

480

else:

356

481

if error is None:

357

482

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

358

483

else:

359

484

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

485

360

486

def activate(self):

361

487

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

362

488

if self.server is None:

366

492

follow_name_owner_changes=True),

367

493

avahi.DBUS_INTERFACE_SERVER)

368

494

self.server.connect_to_signal("StateChanged",

369

self.server_state_changed)

495

self.server_state_changed)

370

496

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

371

497

498

372

499

class AvahiServiceToSyslog(AvahiService):

373

def rename(self):

500

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

374

501

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

375

ret = AvahiService.rename(self)

376

syslogger.setFormatter(logging.Formatter

377

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

378

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

379

% self.name))

502

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

503

syslogger.setFormatter(logging.Formatter(

504

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

505

.format(self.name)))

380

506

return ret

381

507

382

def timedelta_to_milliseconds(td):

383

"Convert a datetime.timedelta() to milliseconds"

384

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

385

+ (td.seconds * 1000)

386

+ (td.microseconds // 1000))

387

508

509

# Pretend that we have a GnuTLS module

510

class gnutls(object):

511

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

512

513

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

514

if library is None:

515

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

516

_library = ctypes.cdll.LoadLibrary(library)

517

del library

518

519

# Unless otherwise indicated, the constants and types below are

520

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

521

522

# Constants

523

E_SUCCESS = 0

524

E_INTERRUPTED = -52

525

E_AGAIN = -28

526

CRT_OPENPGP = 2

527

CRT_RAWPK = 3

528

CLIENT = 2

529

SHUT_RDWR = 0

530

CRD_CERTIFICATE = 1

531

E_NO_CERTIFICATE_FOUND = -49

532

X509_FMT_DER = 0

533

NO_TICKETS = 1<<10

534

ENABLE_RAWPK = 1<<18

535

CTYPE_PEERS = 3

536

KEYID_USE_SHA256 = 1 # gnutls/x509.h

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

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

566

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

567

# code is passed, convert it to a string with

568

# gnutls.strerror()

569

self.code = code

570

if message is None and code is not None:

571

message = gnutls.strerror(code)

572

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

573

message, *args)

574

575

class CertificateSecurityError(Error):

576

pass

577

578

# Classes

579

class Credentials(object):

580

def __init__(self):

581

self._c_object = gnutls.certificate_credentials_t()

582

gnutls.certificate_allocate_credentials(

583

ctypes.byref(self._c_object))

584

self.type = gnutls.CRD_CERTIFICATE

585

586

def __del__(self):

587

gnutls.certificate_free_credentials(self._c_object)

588

589

class ClientSession(object):

590

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

591

self._c_object = gnutls.session_t()

592

gnutls_flags = gnutls.CLIENT

593

if gnutls.check_version(b"3.5.6"):

594

gnutls_flags |= gnutls.NO_TICKETS

595

if gnutls.has_rawpk:

596

gnutls_flags |= gnutls.ENABLE_RAWPK

597

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

598

del gnutls_flags

599

gnutls.set_default_priority(self._c_object)

600

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

601

gnutls.handshake_set_private_extensions(self._c_object,

602

True)

603

self.socket = socket

604

if credentials is None:

605

credentials = gnutls.Credentials()

606

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

607

ctypes.cast(credentials._c_object,

608

ctypes.c_void_p))

609

self.credentials = credentials

610

611

def __del__(self):

612

gnutls.deinit(self._c_object)

613

614

def handshake(self):

615

return gnutls.handshake(self._c_object)

616

617

def send(self, data):

618

data = bytes(data)

619

data_len = len(data)

620

while data_len > 0:

621

data_len -= gnutls.record_send(self._c_object,

622

data[-data_len:],

623

data_len)

624

625

def bye(self):

626

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

627

628

# Error handling functions

629

def _error_code(result):

630

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

631

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

632

if result >= 0:

633

return result

634

if result == gnutls.E_NO_CERTIFICATE_FOUND:

635

raise gnutls.CertificateSecurityError(code=result)

636

raise gnutls.Error(code=result)

637

638

def _retry_on_error(result, func, arguments):

639

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

640

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

641

while result < 0:

642

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

643

return _error_code(result)

644

result = func(*arguments)

645

return result

646

647

# Unless otherwise indicated, the function declarations below are

648

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

649

650

# Functions

651

priority_set_direct = _library.gnutls_priority_set_direct

652

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

653

ctypes.POINTER(ctypes.c_char_p)]

654

priority_set_direct.restype = _error_code

655

656

init = _library.gnutls_init

657

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

658

init.restype = _error_code

659

660

set_default_priority = _library.gnutls_set_default_priority

661

set_default_priority.argtypes = [session_t]

662

set_default_priority.restype = _error_code

663

664

record_send = _library.gnutls_record_send

665

record_send.argtypes = [session_t, ctypes.c_void_p,

666

ctypes.c_size_t]

667

record_send.restype = ctypes.c_ssize_t

668

record_send.errcheck = _retry_on_error

669

670

certificate_allocate_credentials = (

671

_library.gnutls_certificate_allocate_credentials)

672

certificate_allocate_credentials.argtypes = [

673

ctypes.POINTER(certificate_credentials_t)]

674

certificate_allocate_credentials.restype = _error_code

675

676

certificate_free_credentials = (

677

_library.gnutls_certificate_free_credentials)

678

certificate_free_credentials.argtypes = [

679

certificate_credentials_t]

680

certificate_free_credentials.restype = None

681

682

handshake_set_private_extensions = (

683

_library.gnutls_handshake_set_private_extensions)

684

handshake_set_private_extensions.argtypes = [session_t,

685

ctypes.c_int]

686

handshake_set_private_extensions.restype = None

687

688

credentials_set = _library.gnutls_credentials_set

689

credentials_set.argtypes = [session_t, credentials_type_t,

690

ctypes.c_void_p]

691

credentials_set.restype = _error_code

692

693

strerror = _library.gnutls_strerror

694

strerror.argtypes = [ctypes.c_int]

695

strerror.restype = ctypes.c_char_p

696

697

certificate_type_get = _library.gnutls_certificate_type_get

698

certificate_type_get.argtypes = [session_t]

699

certificate_type_get.restype = _error_code

700

701

certificate_get_peers = _library.gnutls_certificate_get_peers

702

certificate_get_peers.argtypes = [session_t,

703

ctypes.POINTER(ctypes.c_uint)]

704

certificate_get_peers.restype = ctypes.POINTER(datum_t)

705

706

global_set_log_level = _library.gnutls_global_set_log_level

707

global_set_log_level.argtypes = [ctypes.c_int]

708

global_set_log_level.restype = None

709

710

global_set_log_function = _library.gnutls_global_set_log_function

711

global_set_log_function.argtypes = [log_func]

712

global_set_log_function.restype = None

713

714

deinit = _library.gnutls_deinit

715

deinit.argtypes = [session_t]

716

deinit.restype = None

717

718

handshake = _library.gnutls_handshake

719

handshake.argtypes = [session_t]

720

handshake.restype = _error_code

721

handshake.errcheck = _retry_on_error

722

723

transport_set_ptr = _library.gnutls_transport_set_ptr

724

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

725

transport_set_ptr.restype = None

726

727

bye = _library.gnutls_bye

728

bye.argtypes = [session_t, close_request_t]

729

bye.restype = _error_code

730

bye.errcheck = _retry_on_error

731

732

check_version = _library.gnutls_check_version

733

check_version.argtypes = [ctypes.c_char_p]

734

check_version.restype = ctypes.c_char_p

735

736

_need_version = b"3.3.0"

737

if check_version(_need_version) is None:

738

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

739

.format(_need_version))

740

741

_tls_rawpk_version = b"3.6.6"

742

has_rawpk = bool(check_version(_tls_rawpk_version))

743

744

if has_rawpk:

745

# Types

746

class pubkey_st(ctypes.Structure):

747

_fields = []

748

pubkey_t = ctypes.POINTER(pubkey_st)

749

750

x509_crt_fmt_t = ctypes.c_int

751

752

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

753

pubkey_init = _library.gnutls_pubkey_init

754

pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]

755

pubkey_init.restype = _error_code

756

757

pubkey_import = _library.gnutls_pubkey_import

758

pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),

759

x509_crt_fmt_t]

760

pubkey_import.restype = _error_code

761

762

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

763

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

764

ctypes.POINTER(ctypes.c_ubyte),

765

ctypes.POINTER(ctypes.c_size_t)]

766

pubkey_get_key_id.restype = _error_code

767

768

pubkey_deinit = _library.gnutls_pubkey_deinit

769

pubkey_deinit.argtypes = [pubkey_t]

770

pubkey_deinit.restype = None

771

else:

772

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

773

774

openpgp_crt_init = _library.gnutls_openpgp_crt_init

775

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

776

openpgp_crt_init.restype = _error_code

777

778

openpgp_crt_import = _library.gnutls_openpgp_crt_import

779

openpgp_crt_import.argtypes = [openpgp_crt_t,

780

ctypes.POINTER(datum_t),

781

openpgp_crt_fmt_t]

782

openpgp_crt_import.restype = _error_code

783

784

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

785

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

786

ctypes.POINTER(ctypes.c_uint)]

787

openpgp_crt_verify_self.restype = _error_code

788

789

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

790

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

791

openpgp_crt_deinit.restype = None

792

793

openpgp_crt_get_fingerprint = (

794

_library.gnutls_openpgp_crt_get_fingerprint)

795

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

796

ctypes.c_void_p,

797

ctypes.POINTER(

798

ctypes.c_size_t)]

799

openpgp_crt_get_fingerprint.restype = _error_code

800

801

if check_version(b"3.6.4"):

802

certificate_type_get2 = _library.gnutls_certificate_type_get2

803

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

804

certificate_type_get2.restype = _error_code

805

806

# Remove non-public functions

807

del _error_code, _retry_on_error

808

809

810

def call_pipe(connection, # : multiprocessing.Connection

811

func, *args, **kwargs):

812

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

813

814

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

815

return value on the provided multiprocessing.Connection.

816

"""

817

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

818

connection.close()

819

820

388

821

class Client(object):

389

822

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

390

823

391

824

Attributes:

392

825

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

393

826

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

394

827

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

395

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

396

to see if the client lives.

397

'None' if no process is running.

398

checker_callback_tag: a gobject event source tag, or None

828

checker: multiprocessing.Process(); a running checker process used

829

to see if the client lives. 'None' if no process is

830

running.

831

checker_callback_tag: a GLib event source tag, or None

399

832

checker_command: string; External command which is run to check

400

833

if client lives. %() expansions are done at

401

834

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

402

835

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

403

checker_initiator_tag: a gobject event source tag, or None

836

checker_initiator_tag: a GLib event source tag, or None

404

837

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

405

838

client_structure: Object describing what attributes a client has

406

839

and is used for storing the client at exit

407

840

current_checker_command: string; current running checker_command

408

disable_initiator_tag: a gobject event source tag, or None

841

disable_initiator_tag: a GLib event source tag, or None

409

842

enabled: bool()

410

843

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

411

uniquely identify the client

844

uniquely identify an OpenPGP client

845

key_id: string (64 hexadecimal digits); used to uniquely identify

846

a client using raw public keys

412

847

host: string; available for use by the checker command

413

848

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

414

849

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

415

850

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

416

851

last_checker_status: integer between 0 and 255 reflecting exit

417

852

status of last checker. -1 reflects crashed

418

checker, or None.

853

checker, -2 means no checker completed yet.

854

last_checker_signal: The signal which killed the last checker, if

855

last_checker_status is -1

419

856

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

420

857

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

421

858

D-Bus identifiers

426

863

runtime_expansions: Allowed attributes for runtime expansion.

427

864

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

428

865

disabled, or None

866

server_settings: The server_settings dict from main()

429

867

"""

430

868

431

869

runtime_expansions = ("approval_delay", "approval_duration",

432

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

433

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

870

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

871

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

872

"last_approval_request", "last_checked_ok",

434

873

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

435

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

436

"extended_timeout": "15m",

437

"interval": "2m",

438

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

439

"host": "",

440

"approval_delay": "0s",

441

"approval_duration": "1s",

442

"approved_by_default": "True",

443

"enabled": "True",

444

}

445

446

def timeout_milliseconds(self):

447

"Return the 'timeout' attribute in milliseconds"

448

return timedelta_to_milliseconds(self.timeout)

449

450

def extended_timeout_milliseconds(self):

451

"Return the 'extended_timeout' attribute in milliseconds"

452

return timedelta_to_milliseconds(self.extended_timeout)

453

454

def interval_milliseconds(self):

455

"Return the 'interval' attribute in milliseconds"

456

return timedelta_to_milliseconds(self.interval)

457

458

def approval_delay_milliseconds(self):

459

return timedelta_to_milliseconds(self.approval_delay)

874

client_defaults = {

875

"timeout": "PT5M",

876

"extended_timeout": "PT15M",

877

"interval": "PT2M",

878

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

879

"host": "",

880

"approval_delay": "PT0S",

881

"approval_duration": "PT1S",

882

"approved_by_default": "True",

883

"enabled": "True",

884

}

460

885

461

886

@staticmethod

462

887

def config_parser(config):

470

895

for client_name in config.sections():

471

896

section = dict(config.items(client_name))

472

897

client = settings[client_name] = {}

473

898

474

899

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

475

900

# Reformat values from string types to Python types

476

901

client["approved_by_default"] = config.getboolean(

477

902

client_name, "approved_by_default")

478

903

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

479

904

"enabled")

480

905

906

# Uppercase and remove spaces from key_id and fingerprint

907

# for later comparison purposes with return value from the

908

# key_id() and fingerprint() functions

909

client["key_id"] = (section.get("key_id", "").upper()

910

.replace(" ", ""))

481

911

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

482

912

.replace(" ", ""))

483

913

if "secret" in section:

484

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

914

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

915

.encode("utf-8"),

916

"base64")

485

917

elif "secfile" in section:

486

918

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

487

919

(section["secfile"])),

488

920

"rb") as secfile:

489

921

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

490

922

else:

491

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

492

% section)

923

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

924

.format(section))

493

925

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

494

926

client["extended_timeout"] = string_to_delta(

495

927

section["extended_timeout"])

501

933

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

502

934

client["last_approval_request"] = None

503

935

client["last_checked_ok"] = None

504

client["last_checker_status"] = None

505

936

client["last_checker_status"] = -2

937

506

938

return settings

507

508

509

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

510

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

511

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

512

attribute."""

939

940

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

513

941

self.name = name

942

if server_settings is None:

943

server_settings = {}

944

self.server_settings = server_settings

514

945

# adding all client settings

515

for setting, value in settings.iteritems():

946

for setting, value in settings.items():

516

947

setattr(self, setting, value)

517

948

518

949

if self.enabled:

519

950

if not hasattr(self, "last_enabled"):

520

951

self.last_enabled = datetime.datetime.utcnow()

524

955

else:

525

956

self.last_enabled = None

526

957

self.expires = None

527

958

528

959

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

529

# Uppercase and remove spaces from fingerprint for later

530

# comparison purposes with return value from the fingerprint()

531

# function

960

logger.debug(" Key ID: %s", self.key_id)

532

961

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

533

962

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

534

963

datetime.datetime.utcnow())

541

970

self.current_checker_command = None

542

971

self.approved = None

543

972

self.approvals_pending = 0

544

self.changedstate = (multiprocessing_manager

545

.Condition(multiprocessing_manager

546

.Lock()))

547

self.client_structure = [attr for attr in

548

self.__dict__.iterkeys()

973

self.changedstate = multiprocessing_manager.Condition(

974

multiprocessing_manager.Lock())

975

self.client_structure = [attr

976

for attr in self.__dict__.keys()

549

977

if not attr.startswith("_")]

550

978

self.client_structure.append("client_structure")

551

552

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

553

lambda obj:

554

isinstance(obj,

555

property)):

979

980

for name, t in inspect.getmembers(

981

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

556

982

if not name.startswith("_"):

557

983

self.client_structure.append(name)

558

984

559

985

# Send notice to process children that client state has changed

560

986

def send_changedstate(self):

561

987

with self.changedstate:

562

988

self.changedstate.notify_all()

563

989

564

990

def enable(self):

565

991

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

566

992

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

567

993

# Already enabled

568

994

return

569

self.send_changedstate()

570

995

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

571

996

self.enabled = True

572

997

self.last_enabled = datetime.datetime.utcnow()

573

998

self.init_checker()

574

999

self.send_changedstate()

1000

575

1001

def disable(self, quiet=True):

576

1002

"""Disable this client."""

577

1003

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

578

1004

return False

579

1005

if not quiet:

580

self.send_changedstate()

581

if not quiet:

582

1006

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

583

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

584

gobject.source_remove(self.disable_initiator_tag)

1007

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

1008

GLib.source_remove(self.disable_initiator_tag)

585

1009

self.disable_initiator_tag = None

586

1010

self.expires = None

587

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

588

gobject.source_remove(self.checker_initiator_tag)

1011

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

1012

GLib.source_remove(self.checker_initiator_tag)

589

1013

self.checker_initiator_tag = None

590

1014

self.stop_checker()

591

1015

self.enabled = False

592

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

1016

if not quiet:

1017

self.send_changedstate()

1018

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

593

1019

return False

594

1020

595

1021

def __del__(self):

596

1022

self.disable()

597

1023

598

1024

def init_checker(self):

599

1025

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

600

1026

# and every interval from then on.

601

self.checker_initiator_tag = (gobject.timeout_add

602

(self.interval_milliseconds(),

603

self.start_checker))

1027

if self.checker_initiator_tag is not None:

1028

GLib.source_remove(self.checker_initiator_tag)

1029

self.checker_initiator_tag = GLib.timeout_add(

1030

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

1031

self.start_checker)

604

1032

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

605

self.disable_initiator_tag = (gobject.timeout_add

606

(self.timeout_milliseconds(),

607

self.disable))

1033

if self.disable_initiator_tag is not None:

1034

GLib.source_remove(self.disable_initiator_tag)

1035

self.disable_initiator_tag = GLib.timeout_add(

1036

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

608

1037

# Also start a new checker *right now*.

609

1038

self.start_checker()

610

611

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

1039

1040

def checker_callback(self, source, condition, connection,

1041

command):

612

1042

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

1043

# Read return code from connection (see call_pipe)

1044

returncode = connection.recv()

1045

connection.close()

1046

self.checker.join()

613

1047

self.checker_callback_tag = None

614

1048

self.checker = None

615

if os.WIFEXITED(condition):

616

self.last_checker_status = os.WEXITSTATUS(condition)

1049

1050

if returncode >= 0:

1051

self.last_checker_status = returncode

1052

self.last_checker_signal = None

617

1053

if self.last_checker_status == 0:

618

1054

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

619

1055

vars(self))

620

1056

self.checked_ok()

621

1057

else:

622

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

623

vars(self))

1058

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

624

1059

else:

625

1060

self.last_checker_status = -1

1061

self.last_checker_signal = -returncode

626

1062

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

627

1063

vars(self))

628

629

def checked_ok(self, timeout=None):

630

"""Bump up the timeout for this client.

631

632

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

633

alive and well.

634

"""

1064

return False

1065

1066

def checked_ok(self):

1067

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

1068

self.last_checked_ok = datetime.datetime.utcnow()

1069

self.last_checker_status = 0

1070

self.last_checker_signal = None

1071

self.bump_timeout()

1072

1073

def bump_timeout(self, timeout=None):

1074

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

635

1075

if timeout is None:

636

1076

timeout = self.timeout

637

self.last_checked_ok = datetime.datetime.utcnow()

638

1077

if self.disable_initiator_tag is not None:

639

gobject.source_remove(self.disable_initiator_tag)

1078

GLib.source_remove(self.disable_initiator_tag)

1079

self.disable_initiator_tag = None

640

1080

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

641

self.disable_initiator_tag = (gobject.timeout_add

642

(timedelta_to_milliseconds

643

(timeout), self.disable))

1081

self.disable_initiator_tag = GLib.timeout_add(

1082

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

644

1083

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

645

1084

646

1085

def need_approval(self):

647

1086

self.last_approval_request = datetime.datetime.utcnow()

648

1087

649

1088

def start_checker(self):

650

1089

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

651

1090

652

1091

If a checker already exists, leave it running and do

653

1092

nothing."""

654

1093

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

655

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

656

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

657

# client would inevitably timeout, since no checker would get

658

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

1094

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

1095

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

1096

# would inevitably timeout, since no checker would get a

1097

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

659

1098

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

660

1099

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

661

1100

# should be.

662

663

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

664

try:

665

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

666

except (AttributeError, OSError) as error:

667

if (isinstance(error, OSError)

668

and error.errno != errno.ECHILD):

669

raise error

670

else:

671

if pid:

672

logger.warning("Checker was a zombie")

673

gobject.source_remove(self.checker_callback_tag)

674

self.checker_callback(pid, status,

675

self.current_checker_command)

1101

1102

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

1103

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

1104

self.checker.join()

1105

self.checker = None

676

1106

# Start a new checker if needed

677

1107

if self.checker is None:

1108

# Escape attributes for the shell

1109

escaped_attrs = {

1110

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

1111

for attr in self.runtime_expansions}

678

1112

try:

679

# In case checker_command has exactly one % operator

680

command = self.checker_command % self.host

681

except TypeError:

682

# Escape attributes for the shell

683

escaped_attrs = dict(

684

(attr,

685

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

686

errors=

687

'replace')))

688

for attr in

689

self.runtime_expansions)

690

691

try:

692

command = self.checker_command % escaped_attrs

693

except TypeError as error:

694

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

695

' %s', self.checker_command, error)

696

return True # Try again later

1113

command = self.checker_command % escaped_attrs

1114

except TypeError as error:

1115

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

1116

self.checker_command,

1117

exc_info=error)

1118

return True # Try again later

697

1119

self.current_checker_command = command

698

try:

699

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

700

command, self.name)

701

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

702

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

703

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

704

# always replaced by /dev/null.)

705

self.checker = subprocess.Popen(command,

706

close_fds=True,

707

shell=True, cwd="/")

708

self.checker_callback_tag = (gobject.child_watch_add

709

(self.checker.pid,

710

self.checker_callback,

711

data=command))

712

# The checker may have completed before the gobject

713

# watch was added. Check for this.

714

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

715

if pid:

716

gobject.source_remove(self.checker_callback_tag)

717

self.checker_callback(pid, status, command)

718

except OSError as error:

719

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

720

error)

721

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

1120

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

1121

self.name)

1122

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

1123

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

1124

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

1125

# always replaced by /dev/null.)

1126

# The exception is when not debugging but nevertheless

1127

# running in the foreground; use the previously

1128

# created wnull.

1129

popen_args = {"close_fds": True,

1130

"shell": True,

1131

"cwd": "/"}

1132

if (not self.server_settings["debug"]

1133

and self.server_settings["foreground"]):

1134

popen_args.update({"stdout": wnull,

1135

"stderr": wnull})

1136

pipe = multiprocessing.Pipe(duplex=False)

1137

self.checker = multiprocessing.Process(

1138

target=call_pipe,

1139

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

1140

kwargs=popen_args)

1141

self.checker.start()

1142

self.checker_callback_tag = GLib.io_add_watch(

1143

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

1144

self.checker_callback, pipe[0], command)

1145

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

722

1146

return True

723

1147

724

1148

def stop_checker(self):

725

1149

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

726

1150

if self.checker_callback_tag:

727

gobject.source_remove(self.checker_callback_tag)

1151

GLib.source_remove(self.checker_callback_tag)

728

1152

self.checker_callback_tag = None

729

1153

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

730

1154

return

731

1155

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

732

try:

733

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

734

#time.sleep(0.5)

735

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

736

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

737

except OSError as error:

738

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

739

raise

1156

self.checker.terminate()

740

1157

self.checker = None

741

1158

742

1159

743

def dbus_service_property(dbus_interface, signature="v",

744

access="readwrite", byte_arrays=False):

1160

def dbus_service_property(dbus_interface,

1161

signature="v",

1162

access="readwrite",

1163

byte_arrays=False):

745

1164

"""Decorators for marking methods of a DBusObjectWithProperties to

746

1165

become properties on the D-Bus.

747

1166

748

1167

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

749

1168

and with one argument by "Set".

750

1169

751

1170

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

752

1171

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

753

1172

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

756

1175

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

757

1176

if byte_arrays and signature != "ay":

758

1177

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

759

" signature %r" % signature)

1178

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

1179

760

1180

def decorator(func):

761

1181

func._dbus_is_property = True

762

1182

func._dbus_interface = dbus_interface

765

1185

func._dbus_name = func.__name__

766

1186

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

767

1187

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

768

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

769

return func

1188

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1189

return func

1190

1191

return decorator

1192

1193

1194

def dbus_interface_annotations(dbus_interface):

1195

"""Decorator for marking functions returning interface annotations

1196

1197

Usage:

1198

1199

@dbus_interface_annotations("org.example.Interface")

1200

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

1201

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

1202

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

1203

"false"}

1204

"""

1205

1206

def decorator(func):

1207

func._dbus_is_interface = True

1208

func._dbus_interface = dbus_interface

1209

func._dbus_name = dbus_interface

1210

return func

1211

1212

return decorator

1213

1214

1215

def dbus_annotations(annotations):

1216

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

1217

Usage:

1218

1219

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

1220

"org.freedesktop.DBus.Property."

1221

"EmitsChangedSignal": "false"})

1222

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

1223

access="r")

1224

def Property_dbus_property(self):

1225

return dbus.Boolean(False)

1226

1227

See also the DBusObjectWithAnnotations class.

1228

"""

1229

1230

def decorator(func):

1231

func._dbus_annotations = annotations

1232

return func

1233

770

1234

return decorator

771

1235

772

1236

773

1237

class DBusPropertyException(dbus.exceptions.DBusException):

774

1238

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

775

1239

"""

776

def __unicode__(self):

777

return unicode(str(self))

1240

pass

778

1241

779

1242

780

1243

class DBusPropertyAccessException(DBusPropertyException):

789

1252

pass

790

1253

791

1254

792

class DBusObjectWithProperties(dbus.service.Object):

1255

class DBusObjectWithAnnotations(dbus.service.Object):

1256

"""A D-Bus object with annotations.

1257

1258

Classes inheriting from this can use the dbus_annotations

1259

decorator to add annotations to methods or signals.

1260

"""

1261

1262

@staticmethod

1263

def _is_dbus_thing(thing):

1264

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

1265

1266

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

1267

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

1268

"""

1269

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

1270

False)

1271

1272

def _get_all_dbus_things(self, thing):

1273

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

1274

"""

1275

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

1276

athing.__get__(self))

1277

for cls in self.__class__.__mro__

1278

for name, athing in

1279

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

1280

1281

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1282

out_signature="s",

1283

path_keyword='object_path',

1284

connection_keyword='connection')

1285

def Introspect(self, object_path, connection):

1286

"""Overloading of standard D-Bus method.

1287

1288

Inserts annotation tags on methods and signals.

1289

"""

1290

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

1291

connection)

1292

try:

1293

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

1294

1295

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

1296

# Add annotation tags

1297

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

1298

for tag in if_tag.getElementsByTagName(typ):

1299

annots = dict()

1300

for name, prop in (self.

1301

_get_all_dbus_things(typ)):

1302

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

1303

and prop._dbus_interface

1304

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

1305

annots.update(getattr(

1306

prop, "_dbus_annotations", {}))

1307

for name, value in annots.items():

1308

ann_tag = document.createElement(

1309

"annotation")

1310

ann_tag.setAttribute("name", name)

1311

ann_tag.setAttribute("value", value)

1312

tag.appendChild(ann_tag)

1313

# Add interface annotation tags

1314

for annotation, value in dict(

1315

itertools.chain.from_iterable(

1316

annotations().items()

1317

for name, annotations

1318

in self._get_all_dbus_things("interface")

1319

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

1320

)).items():

1321

ann_tag = document.createElement("annotation")

1322

ann_tag.setAttribute("name", annotation)

1323

ann_tag.setAttribute("value", value)

1324

if_tag.appendChild(ann_tag)

1325

# Fix argument name for the Introspect method itself

1326

if (if_tag.getAttribute("name")

1327

== dbus.INTROSPECTABLE_IFACE):

1328

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

1329

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

1330

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

1331

if (arg.getAttribute("direction")

1332

== "out"):

1333

arg.setAttribute("name",

1334

"xml_data")

1335

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

1336

document.unlink()

1337

except (AttributeError, xml.dom.DOMException,

1338

xml.parsers.expat.ExpatError) as error:

1339

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

1340

exc_info=error)

1341

return xmlstring

1342

1343

1344

class DBusObjectWithProperties(DBusObjectWithAnnotations):

793

1345

"""A D-Bus object with properties.

794

1346

795

1347

Classes inheriting from this can use the dbus_service_property

796

1348

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

797

1349

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

798

1350

"""

799

800

@staticmethod

801

def _is_dbus_property(obj):

802

return getattr(obj, "_dbus_is_property", False)

803

804

def _get_all_dbus_properties(self):

805

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

806

"""

807

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

808

for cls in self.__class__.__mro__

809

for name, prop in

810

inspect.getmembers(cls, self._is_dbus_property))

811

1351

812

1352

def _get_dbus_property(self, interface_name, property_name):

813

1353

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

814

1354

property with the specified name and interface.

815

1355

"""

816

for cls in self.__class__.__mro__:

817

for name, value in (inspect.getmembers

818

(cls, self._is_dbus_property)):

1356

for cls in self.__class__.__mro__:

1357

for name, value in inspect.getmembers(

1358

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

819

1359

if (value._dbus_name == property_name

820

1360

and value._dbus_interface == interface_name):

821

1361

return value.__get__(self)

822

1362

823

1363

# No such property

824

raise DBusPropertyNotFound(self.dbus_object_path + ":"

825

+ interface_name + "."

826

+ property_name)

827

828

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

1364

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

1365

self.dbus_object_path, interface_name, property_name))

1366

1367

@classmethod

1368

def _get_all_interface_names(cls):

1369

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

1370

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

1371

"_dbus_interface", None)

1372

for x in (inspect.getmro(cls))

1373

for attr in dir(x))

1374

if name is not None)

1375

1376

@dbus.service.method(dbus.PROPERTIES_IFACE,

1377

in_signature="ss",

829

1378

out_signature="v")

830

1379

def Get(self, interface_name, property_name):

831

1380

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

837

1386

if not hasattr(value, "variant_level"):

838

1387

return value

839

1388

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

840

1389

841

1390

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

842

1391

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

843

1392

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

849

1398

# The byte_arrays option is not supported yet on

850

1399

# signatures other than "ay".

851

1400

if prop._dbus_signature != "ay":

852

raise ValueError

1401

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

1402

"'ay' signature {!r}"

1403

.format(prop._dbus_signature))

853

1404

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

854

1405

for byte in value))

855

1406

prop(value)

856

857

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

1407

1408

@dbus.service.method(dbus.PROPERTIES_IFACE,

1409

in_signature="s",

858

1410

out_signature="a{sv}")

859

1411

def GetAll(self, interface_name):

860

1412

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

861

1413

standard.

862

1414

863

1415

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

864

1416

"""

865

1417

properties = {}

866

for name, prop in self._get_all_dbus_properties():

1418

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

867

1419

if (interface_name

868

1420

and interface_name != prop._dbus_interface):

869

1421

# Interface non-empty but did not match

875

1427

if not hasattr(value, "variant_level"):

876

1428

properties[name] = value

877

1429

continue

878

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

879

value.variant_level+1)

1430

properties[name] = type(value)(

1431

value, variant_level=value.variant_level + 1)

880

1432

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

881

1433

1434

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

1435

def PropertiesChanged(self, interface_name, changed_properties,

1436

invalidated_properties):

1437

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

1438

standard.

1439

"""

1440

pass

1441

882

1442

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

883

1443

out_signature="s",

884

1444

path_keyword='object_path',

885

1445

connection_keyword='connection')

886

1446

def Introspect(self, object_path, connection):

887

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

1447

"""Overloading of standard D-Bus method.

1448

1449

Inserts property tags and interface annotation tags.

888

1450

"""

889

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

890

connection)

1451

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1452

object_path,

1453

connection)

891

1454

try:

892

1455

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

1456

893

1457

def make_tag(document, name, prop):

894

1458

e = document.createElement("property")

895

1459

e.setAttribute("name", name)

896

1460

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

897

1461

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

898

1462

return e

1463

899

1464

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

1465

# Add property tags

900

1466

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

901

1467

for name, prop

902

in self._get_all_dbus_properties()

1468

in self._get_all_dbus_things("property")

903

1469

if prop._dbus_interface

904

1470

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

905

1471

if_tag.appendChild(tag)

1472

# Add annotation tags for properties

1473

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

1474

annots = dict()

1475

for name, prop in self._get_all_dbus_things(

1476

"property"):

1477

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

1478

and prop._dbus_interface

1479

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

1480

annots.update(getattr(

1481

prop, "_dbus_annotations", {}))

1482

for name, value in annots.items():

1483

ann_tag = document.createElement(

1484

"annotation")

1485

ann_tag.setAttribute("name", name)

1486

ann_tag.setAttribute("value", value)

1487

tag.appendChild(ann_tag)

906

1488

# Add the names to the return values for the

907

1489

# "org.freedesktop.DBus.Properties" methods

908

1490

if (if_tag.getAttribute("name")

923

1505

except (AttributeError, xml.dom.DOMException,

924

1506

xml.parsers.expat.ExpatError) as error:

925

1507

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

926

error)

927

return xmlstring

928

929

930

def datetime_to_dbus (dt, variant_level=0):

1508

exc_info=error)

1509

return xmlstring

1510

1511

1512

try:

1513

dbus.OBJECT_MANAGER_IFACE

1514

except AttributeError:

1515

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

1516

1517

1518

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1519

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

1520

1521

Classes inheriting from this exposes the standard

1522

GetManagedObjects call and the InterfacesAdded and

1523

InterfacesRemoved signals on the standard

1524

"org.freedesktop.DBus.ObjectManager" interface.

1525

1526

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

1527

manually.

1528

"""

1529

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1530

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

1531

def GetManagedObjects(self):

1532

"""This function must be overridden"""

1533

raise NotImplementedError()

1534

1535

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1536

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

1537

def InterfacesAdded(self, object_path, interfaces_and_properties):

1538

pass

1539

1540

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

1541

def InterfacesRemoved(self, object_path, interfaces):

1542

pass

1543

1544

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1545

out_signature="s",

1546

path_keyword='object_path',

1547

connection_keyword='connection')

1548

def Introspect(self, object_path, connection):

1549

"""Overloading of standard D-Bus method.

1550

1551

Override return argument name of GetManagedObjects to be

1552

"objpath_interfaces_and_properties"

1553

"""

1554

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1555

object_path,

1556

connection)

1557

try:

1558

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

1559

1560

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

1561

# Fix argument name for the GetManagedObjects method

1562

if (if_tag.getAttribute("name")

1563

== dbus.OBJECT_MANAGER_IFACE):

1564

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

1565

if (cn.getAttribute("name")

1566

== "GetManagedObjects"):

1567

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

1568

if (arg.getAttribute("direction")

1569

== "out"):

1570

arg.setAttribute(

1571

"name",

1572

"objpath_interfaces"

1573

"_and_properties")

1574

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

1575

document.unlink()

1576

except (AttributeError, xml.dom.DOMException,

1577

xml.parsers.expat.ExpatError) as error:

1578

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

1579

exc_info=error)

1580

return xmlstring

1581

1582

1583

def datetime_to_dbus(dt, variant_level=0):

931

1584

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

932

1585

if dt is None:

933

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

934

return dbus.String(dt.isoformat(),

935

variant_level=variant_level)

936

937

938

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

939

.__metaclass__):

940

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

941

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

1586

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

1587

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

1588

1589

1590

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1591

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

1592

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

1593

interface names according to the "alt_interface_names" mapping.

1594

Usage:

1595

1596

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

1597

"net.example.AlternateInterface"})

1598

class SampleDBusObject(dbus.service.Object):

1599

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

1600

def SampleDBusMethod():

1601

pass

1602

1603

The above "SampleDBusMethod" on "SampleDBusObject" will be

1604

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

1605

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

1606

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

1607

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

1608

1609

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

1610

(from DBusObjectWithProperties) and interfaces (from the

1611

dbus_interface_annotations decorator).

942

1612

"""

943

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

944

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

945

# methods, signals, or properties in them

946

for base in (b for b in bases

947

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

948

# Go though all attributes of the base class

949

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

1613

1614

def wrapper(cls):

1615

for orig_interface_name, alt_interface_name in (

1616

alt_interface_names.items()):

1617

attr = {}

1618

interface_names = set()

1619

# Go though all attributes of the class

1620

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

950

1621

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

951

1622

# with the wrong interface name

952

1623

if (not hasattr(attribute, "_dbus_interface")

953

or not attribute._dbus_interface

954

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

1624

or not attribute._dbus_interface.startswith(

1625

orig_interface_name)):

955

1626

continue

956

1627

# Create an alternate D-Bus interface name based on

957

1628

# the current name

958

alt_interface = (attribute._dbus_interface

959

.replace("se.recompile.Mandos",

960

"se.bsnet.fukt.Mandos"))

1629

alt_interface = attribute._dbus_interface.replace(

1630

orig_interface_name, alt_interface_name)

1631

interface_names.add(alt_interface)

961

1632

# Is this a D-Bus signal?

962

1633

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

963

# Extract the original non-method function by

964

# black magic

965

nonmethod_func = (dict(

1634

# Extract the original non-method undecorated

1635

# function by black magic

1636

if sys.version_info.major == 2:

1637

nonmethod_func = (dict(

966

1638

zip(attribute.func_code.co_freevars,

967

attribute.__closure__))["func"]

968

.cell_contents)

1639

attribute.__closure__))

1640

["func"].cell_contents)

1641

else:

1642

nonmethod_func = (dict(

1643

zip(attribute.__code__.co_freevars,

1644

attribute.__closure__))

1645

["func"].cell_contents)

969

1646

# Create a new, but exactly alike, function

970

1647

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

971

1648

# with the alternate D-Bus interface name

972

new_function = (dbus.service.signal

973

(alt_interface,

974

attribute._dbus_signature)

975

(types.FunctionType(

976

nonmethod_func.func_code,

977

nonmethod_func.func_globals,

978

nonmethod_func.func_name,

979

nonmethod_func.func_defaults,

980

nonmethod_func.func_closure)))

1649

new_function = copy_function(nonmethod_func)

1650

new_function = (dbus.service.signal(

1651

alt_interface,

1652

attribute._dbus_signature)(new_function))

1653

# Copy annotations, if any

1654

try:

1655

new_function._dbus_annotations = dict(

1656

attribute._dbus_annotations)

1657

except AttributeError:

1658

pass

1659

981

1660

# Define a creator of a function to call both the

982

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

983

# signals gets sent when the function is called

1661

# original and alternate functions, so both the

1662

# original and alternate signals gets sent when

1663

# the function is called

984

1664

def fixscope(func1, func2):

985

1665

"""This function is a scope container to pass

986

1666

func1 and func2 to the "call_both" function

987

1667

outside of its arguments"""

1668

1669

@functools.wraps(func2)

988

1670

def call_both(*args, **kwargs):

989

1671

"""This function will emit two D-Bus

990

1672

signals by calling func1 and func2"""

991

1673

func1(*args, **kwargs)

992

1674

func2(*args, **kwargs)

1675

# Make wrapper function look like a D-Bus

1676

# signal

1677

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

1678

if name.startswith("_dbus_"):

1679

setattr(call_both, name, attr)

1680

993

1681

return call_both

994

1682

# Create the "call_both" function and add it to

995

1683

# the class

996

attr[attrname] = fixscope(attribute,

997

new_function)

1684

attr[attrname] = fixscope(attribute, new_function)

998

1685

# Is this a D-Bus method?

999

1686

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

1000

1687

# Create a new, but exactly alike, function

1001

1688

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

1002

1689

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

1003

1690

# to the class.

1004

attr[attrname] = (dbus.service.method

1005

(alt_interface,

1006

attribute._dbus_in_signature,

1007

attribute._dbus_out_signature)

1008

(types.FunctionType

1009

(attribute.func_code,

1010

attribute.func_globals,

1011

attribute.func_name,

1012

attribute.func_defaults,

1013

attribute.func_closure)))

1691

attr[attrname] = (

1692

dbus.service.method(

1693

alt_interface,

1694

attribute._dbus_in_signature,

1695

attribute._dbus_out_signature)

1696

(copy_function(attribute)))

1697

# Copy annotations, if any

1698

try:

1699

attr[attrname]._dbus_annotations = dict(

1700

attribute._dbus_annotations)

1701

except AttributeError:

1702

pass

1014

1703

# Is this a D-Bus property?

1015

1704

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

1016

1705

# Create a new, but exactly alike, function

1017

1706

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

1018

1707

# property with the alternate D-Bus interface

1019

1708

# name. Add it to the class.

1020

attr[attrname] = (dbus_service_property

1021

(alt_interface,

1022

attribute._dbus_signature,

1023

attribute._dbus_access,

1024

attribute

1025

._dbus_get_args_options

1026

["byte_arrays"])

1027

(types.FunctionType

1028

(attribute.func_code,

1029

attribute.func_globals,

1030

attribute.func_name,

1031

attribute.func_defaults,

1032

attribute.func_closure)))

1033

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

1034

1035

1709

attr[attrname] = (dbus_service_property(

1710

alt_interface, attribute._dbus_signature,

1711

attribute._dbus_access,

1712

attribute._dbus_get_args_options

1713

["byte_arrays"])

1714

(copy_function(attribute)))

1715

# Copy annotations, if any

1716

try:

1717

attr[attrname]._dbus_annotations = dict(

1718

attribute._dbus_annotations)

1719

except AttributeError:

1720

pass

1721

# Is this a D-Bus interface?

1722

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

1723

# Create a new, but exactly alike, function

1724

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

1725

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

1726

# to the class.

1727

attr[attrname] = (

1728

dbus_interface_annotations(alt_interface)

1729

(copy_function(attribute)))

1730

if deprecate:

1731

# Deprecate all alternate interfaces

1732

iname = "_AlternateDBusNames_interface_annotation{}"

1733

for interface_name in interface_names:

1734

1735

@dbus_interface_annotations(interface_name)

1736

def func(self):

1737

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

1738

"true"}

1739

# Find an unused name

1740

for aname in (iname.format(i)

1741

for i in itertools.count()):

1742

if aname not in attr:

1743

attr[aname] = func

1744

break

1745

if interface_names:

1746

# Replace the class with a new subclass of it with

1747

# methods, signals, etc. as created above.

1748

if sys.version_info.major == 2:

1749

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

1750

(cls, ), attr)

1751

else:

1752

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

1753

(cls, ), attr)

1754

return cls

1755

1756

return wrapper

1757

1758

1759

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

1760

"se.bsnet.fukt.Mandos"})

1036

1761

class ClientDBus(Client, DBusObjectWithProperties):

1037

1762

"""A Client class using D-Bus

1038

1763

1039

1764

Attributes:

1040

1765

dbus_object_path: dbus.ObjectPath

1041

1766

bus: dbus.SystemBus()

1042

1767

"""

1043

1768

1044

1769

runtime_expansions = (Client.runtime_expansions

1045

+ ("dbus_object_path",))

1046

1770

+ ("dbus_object_path", ))

1771

1772

_interface = "se.recompile.Mandos.Client"

1773

1047

1774

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

1048

1049

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

1775

1776

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

1050

1777

self.bus = bus

1051

1778

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

1052

1779

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

1053

1780

# the D-Bus

1054

client_object_name = unicode(self.name).translate(

1781

client_object_name = str(self.name).translate(

1055

1782

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

1056

1783

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

1057

self.dbus_object_path = (dbus.ObjectPath

1058

("/clients/" + client_object_name))

1784

self.dbus_object_path = dbus.ObjectPath(

1785

"/clients/" + client_object_name)

1059

1786

DBusObjectWithProperties.__init__(self, self.bus,

1060

1787

self.dbus_object_path)

1061

1062

def notifychangeproperty(transform_func,

1063

dbus_name, type_func=lambda x: x,

1064

variant_level=1):

1788

1789

def notifychangeproperty(transform_func, dbus_name,

1790

type_func=lambda x: x,

1791

variant_level=1,

1792

invalidate_only=False,

1793

_interface=_interface):

1065

1794

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

1066

1795

its changes to DBus.

1067

1796

1068

1797

transform_fun: Function that takes a value and a variant_level

1069

1798

and transforms it to a D-Bus type.

1070

1799

dbus_name: D-Bus name of the variable

1072

1801

to the D-Bus. Default: no transform

1073

1802

variant_level: D-Bus variant level. Default: 1

1074

1803

"""

1075

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

1804

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

1805

1076

1806

def setter(self, value):

1077

1807

if hasattr(self, "dbus_object_path"):

1078

1808

if (not hasattr(self, attrname) or

1079

1809

type_func(getattr(self, attrname, None))

1080

1810

!= type_func(value)):

1081

dbus_value = transform_func(type_func(value),

1082

variant_level

1083

=variant_level)

1084

self.PropertyChanged(dbus.String(dbus_name),

1085

dbus_value)

1811

if invalidate_only:

1812

self.PropertiesChanged(

1813

_interface, dbus.Dictionary(),

1814

dbus.Array((dbus_name, )))

1815

else:

1816

dbus_value = transform_func(

1817

type_func(value),

1818

variant_level=variant_level)

1819

self.PropertyChanged(dbus.String(dbus_name),

1820

dbus_value)

1821

self.PropertiesChanged(

1822

_interface,

1823

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

1824

dbus_value}),

1825

dbus.Array())

1086

1826

setattr(self, attrname, value)

1087

1827

1088

1828

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

1089

1090

1829

1091

1830

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1092

1831

approvals_pending = notifychangeproperty(dbus.Boolean,

1093

1832

"ApprovalPending",

1094

type_func = bool)

1833

type_func=bool)

1095

1834

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

1096

1835

last_enabled = notifychangeproperty(datetime_to_dbus,

1097

1836

"LastEnabled")

1098

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

1099

type_func = lambda checker:

1100

checker is not None)

1837

checker = notifychangeproperty(

1838

dbus.Boolean, "CheckerRunning",

1839

type_func=lambda checker: checker is not None)

1101

1840

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1102

1841

"LastCheckedOK")

1842

last_checker_status = notifychangeproperty(dbus.Int16,

1843

"LastCheckerStatus")

1103

1844

last_approval_request = notifychangeproperty(

1104

1845

datetime_to_dbus, "LastApprovalRequest")

1105

1846

approved_by_default = notifychangeproperty(dbus.Boolean,

1106

1847

"ApprovedByDefault")

1107

approval_delay = notifychangeproperty(dbus.UInt64,

1108

"ApprovalDelay",

1109

type_func =

1110

timedelta_to_milliseconds)

1848

approval_delay = notifychangeproperty(

1849

dbus.UInt64, "ApprovalDelay",

1850

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

1111

1851

approval_duration = notifychangeproperty(

1112

1852

dbus.UInt64, "ApprovalDuration",

1113

type_func = timedelta_to_milliseconds)

1853

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

1114

1854

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

1115

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

1116

type_func =

1117

timedelta_to_milliseconds)

1855

timeout = notifychangeproperty(

1856

dbus.UInt64, "Timeout",

1857

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

1118

1858

extended_timeout = notifychangeproperty(

1119

1859

dbus.UInt64, "ExtendedTimeout",

1120

type_func = timedelta_to_milliseconds)

1121

interval = notifychangeproperty(dbus.UInt64,

1122

"Interval",

1123

type_func =

1124

timedelta_to_milliseconds)

1860

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

1861

interval = notifychangeproperty(

1862

dbus.UInt64, "Interval",

1863

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

1125

1864

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

1126

1865

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

1866

invalidate_only=True)

1867

1127

1868

del notifychangeproperty

1128

1869

1129

1870

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

1130

1871

try:

1131

1872

self.remove_from_connection()

1134

1875

if hasattr(DBusObjectWithProperties, "__del__"):

1135

1876

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

1136

1877

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

1137

1138

def checker_callback(self, pid, condition, command,

1139

*args, **kwargs):

1140

self.checker_callback_tag = None

1141

self.checker = None

1142

if os.WIFEXITED(condition):

1143

exitstatus = os.WEXITSTATUS(condition)

1878

1879

def checker_callback(self, source, condition,

1880

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

1881

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

1882

connection, command, *args,

1883

**kwargs)

1884

exitstatus = self.last_checker_status

1885

if exitstatus >= 0:

1144

1886

# Emit D-Bus signal

1145

1887

self.CheckerCompleted(dbus.Int16(exitstatus),

1146

dbus.Int64(condition),

1888

# This is specific to GNU libC

1889

dbus.Int64(exitstatus << 8),

1147

1890

dbus.String(command))

1148

1891

else:

1149

1892

# Emit D-Bus signal

1150

1893

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

1151

dbus.Int64(condition),

1894

dbus.Int64(

1895

# This is specific to GNU libC

1896

(exitstatus << 8)

1897

| self.last_checker_signal),

1152

1898

dbus.String(command))

1153

1154

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

1155

*args, **kwargs)

1156

1899

return ret

1900

1157

1901

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

1158

old_checker = self.checker

1159

if self.checker is not None:

1160

old_checker_pid = self.checker.pid

1161

else:

1162

old_checker_pid = None

1902

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

1163

1903

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

1164

1904

# Only if new checker process was started

1165

1905

if (self.checker is not None

1167

1907

# Emit D-Bus signal

1168

1908

self.CheckerStarted(self.current_checker_command)

1169

1909

return r

1170

1910

1171

1911

def _reset_approved(self):

1172

1912

self.approved = None

1173

1913

return False

1174

1914

1175

1915

def approve(self, value=True):

1176

self.send_changedstate()

1177

1916

self.approved = value

1178

gobject.timeout_add(timedelta_to_milliseconds

1179

(self.approval_duration),

1180

self._reset_approved)

1181

1182

1183

## D-Bus methods, signals & properties

1184

_interface = "se.recompile.Mandos.Client"

1185

1186

## Signals

1187

1917

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

1918

* 1000), self._reset_approved)

1919

self.send_changedstate()

1920

1921

# D-Bus methods, signals & properties

1922

1923

# Interfaces

1924

1925

# Signals

1926

1188

1927

# CheckerCompleted - signal

1189

1928

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

1190

1929

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

1191

1930

"D-Bus signal"

1192

1931

pass

1193

1932

1194

1933

# CheckerStarted - signal

1195

1934

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

1196

1935

def CheckerStarted(self, command):

1197

1936

"D-Bus signal"

1198

1937

pass

1199

1938

1200

1939

# PropertyChanged - signal

1940

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

1201

1941

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

1202

1942

def PropertyChanged(self, property, value):

1203

1943

"D-Bus signal"

1204

1944

pass

1205

1945

1206

1946

# GotSecret - signal

1207

1947

@dbus.service.signal(_interface)

1208

1948

def GotSecret(self):

1211

1951

server to mandos-client

1212

1952

"""

1213

1953

pass

1214

1954

1215

1955

# Rejected - signal

1216

1956

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

1217

1957

def Rejected(self, reason):

1218

1958

"D-Bus signal"

1219

1959

pass

1220

1960

1221

1961

# NeedApproval - signal

1222

1962

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

1223

1963

def NeedApproval(self, timeout, default):

1224

1964

"D-Bus signal"

1225

1965

return self.need_approval()

1226

1227

# NewRequest - signal

1228

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

1229

def NewRequest(self, ip):

1230

"""D-Bus signal

1231

Is sent after a client request a secret.

1232

"""

1233

pass

1234

1235

## Methods

1236

1966

1967

# Methods

1968

1237

1969

# Approve - method

1238

1970

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

1239

1971

def Approve(self, value):

1240

1972

self.approve(value)

1241

1973

1242

1974

# CheckedOK - method

1243

1975

@dbus.service.method(_interface)

1244

1976

def CheckedOK(self):

1245

1977

self.checked_ok()

1246

1978

1247

1979

# Enable - method

1980

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

1248

1981

@dbus.service.method(_interface)

1249

1982

def Enable(self):

1250

1983

"D-Bus method"

1251

1984

self.enable()

1252

1985

1253

1986

# StartChecker - method

1987

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

1254

1988

@dbus.service.method(_interface)

1255

1989

def StartChecker(self):

1256

1990

"D-Bus method"

1257

1991

self.start_checker()

1258

1992

1259

1993

# Disable - method

1994

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

1260

1995

@dbus.service.method(_interface)

1261

1996

def Disable(self):

1262

1997

"D-Bus method"

1263

1998

self.disable()

1264

1999

1265

2000

# StopChecker - method

2001

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

1266

2002

@dbus.service.method(_interface)

1267

2003

def StopChecker(self):

1268

2004

self.stop_checker()

1269

1270

## Properties

1271

2005

2006

# Properties

2007

1272

2008

# ApprovalPending - property

1273

2009

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

1274

2010

def ApprovalPending_dbus_property(self):

1275

2011

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

1276

2012

1277

2013

# ApprovedByDefault - property

1278

@dbus_service_property(_interface, signature="b",

2014

@dbus_service_property(_interface,

2015

signature="b",

1279

2016

access="readwrite")

1280

2017

def ApprovedByDefault_dbus_property(self, value=None):

1281

2018

if value is None: # get

1282

2019

return dbus.Boolean(self.approved_by_default)

1283

2020

self.approved_by_default = bool(value)

1284

2021

1285

2022

# ApprovalDelay - property

1286

@dbus_service_property(_interface, signature="t",

2023

@dbus_service_property(_interface,

2024

signature="t",

1287

2025

access="readwrite")

1288

2026

def ApprovalDelay_dbus_property(self, value=None):

1289

2027

if value is None: # get

1290

return dbus.UInt64(self.approval_delay_milliseconds())

2028

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

2029

* 1000)

1291

2030

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

1292

2031

1293

2032

# ApprovalDuration - property

1294

@dbus_service_property(_interface, signature="t",

2033

@dbus_service_property(_interface,

2034

signature="t",

1295

2035

access="readwrite")

1296

2036

def ApprovalDuration_dbus_property(self, value=None):

1297

2037

if value is None: # get

1298

return dbus.UInt64(timedelta_to_milliseconds(

1299

self.approval_duration))

2038

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

2039

* 1000)

1300

2040

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

1301

2041

1302

2042

# Name - property

2043

@dbus_annotations(

2044

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

1303

2045

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

1304

2046

def Name_dbus_property(self):

1305

2047

return dbus.String(self.name)

1306

2048

2049

# KeyID - property

2050

@dbus_annotations(

2051

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

2052

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

2053

def KeyID_dbus_property(self):

2054

return dbus.String(self.key_id)

2055

1307

2056

# Fingerprint - property

2057

@dbus_annotations(

2058

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

1308

2059

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

1309

2060

def Fingerprint_dbus_property(self):

1310

2061

return dbus.String(self.fingerprint)

1311

2062

1312

2063

# Host - property

1313

@dbus_service_property(_interface, signature="s",

2064

@dbus_service_property(_interface,

2065

signature="s",

1314

2066

access="readwrite")

1315

2067

def Host_dbus_property(self, value=None):

1316

2068

if value is None: # get

1317

2069

return dbus.String(self.host)

1318

self.host = unicode(value)

1319

2070

self.host = str(value)

2071

1320

2072

# Created - property

2073

@dbus_annotations(

2074

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

1321

2075

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

1322

2076

def Created_dbus_property(self):

1323

2077

return datetime_to_dbus(self.created)

1324

2078

1325

2079

# LastEnabled - property

1326

2080

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

1327

2081

def LastEnabled_dbus_property(self):

1328

2082

return datetime_to_dbus(self.last_enabled)

1329

2083

1330

2084

# Enabled - property

1331

@dbus_service_property(_interface, signature="b",

2085

@dbus_service_property(_interface,

2086

signature="b",

1332

2087

access="readwrite")

1333

2088

def Enabled_dbus_property(self, value=None):

1334

2089

if value is None: # get

1337

2092

self.enable()

1338

2093

else:

1339

2094

self.disable()

1340

2095

1341

2096

# LastCheckedOK - property

1342

@dbus_service_property(_interface, signature="s",

2097

@dbus_service_property(_interface,

2098

signature="s",

1343

2099

access="readwrite")

1344

2100

def LastCheckedOK_dbus_property(self, value=None):

1345

2101

if value is not None:

1346

2102

self.checked_ok()

1347

2103

return

1348

2104

return datetime_to_dbus(self.last_checked_ok)

1349

2105

2106

# LastCheckerStatus - property

2107

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

2108

def LastCheckerStatus_dbus_property(self):

2109

return dbus.Int16(self.last_checker_status)

2110

1350

2111

# Expires - property

1351

2112

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

1352

2113

def Expires_dbus_property(self):

1353

2114

return datetime_to_dbus(self.expires)

1354

2115

1355

2116

# LastApprovalRequest - property

1356

2117

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

1357

2118

def LastApprovalRequest_dbus_property(self):

1358

2119

return datetime_to_dbus(self.last_approval_request)

1359

2120

1360

2121

# Timeout - property

1361

@dbus_service_property(_interface, signature="t",

2122

@dbus_service_property(_interface,

2123

signature="t",

1362

2124

access="readwrite")

1363

2125

def Timeout_dbus_property(self, value=None):

1364

2126

if value is None: # get

1365

return dbus.UInt64(self.timeout_milliseconds())

2127

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

2128

old_timeout = self.timeout

1366

2129

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

1367

# Reschedule timeout

2130

# Reschedule disabling

1368

2131

if self.enabled:

1369

2132

now = datetime.datetime.utcnow()

1370

time_to_die = timedelta_to_milliseconds(

1371

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

1372

if time_to_die <= 0:

2133

self.expires += self.timeout - old_timeout

2134

if self.expires <= now:

1373

2135

# The timeout has passed

1374

2136

self.disable()

1375

2137

else:

1376

self.expires = (now +

1377

datetime.timedelta(milliseconds =

1378

time_to_die))

1379

2138

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

1380

2139

is None):

1381

2140

return

1382

gobject.source_remove(self.disable_initiator_tag)

1383

self.disable_initiator_tag = (gobject.timeout_add

1384

(time_to_die,

1385

self.disable))

1386

2141

GLib.source_remove(self.disable_initiator_tag)

2142

self.disable_initiator_tag = GLib.timeout_add(

2143

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

2144

self.disable)

2145

1387

2146

# ExtendedTimeout - property

1388

@dbus_service_property(_interface, signature="t",

2147

@dbus_service_property(_interface,

2148

signature="t",

1389

2149

access="readwrite")

1390

2150

def ExtendedTimeout_dbus_property(self, value=None):

1391

2151

if value is None: # get

1392

return dbus.UInt64(self.extended_timeout_milliseconds())

2152

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

2153

* 1000)

1393

2154

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

1394

2155

1395

2156

# Interval - property

1396

@dbus_service_property(_interface, signature="t",

2157

@dbus_service_property(_interface,

2158

signature="t",

1397

2159

access="readwrite")

1398

2160

def Interval_dbus_property(self, value=None):

1399

2161

if value is None: # get

1400

return dbus.UInt64(self.interval_milliseconds())

2162

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

1401

2163

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

1402

2164

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

1403

2165

return

1404

2166

if self.enabled:

1405

2167

# Reschedule checker run

1406

gobject.source_remove(self.checker_initiator_tag)

1407

self.checker_initiator_tag = (gobject.timeout_add

1408

(value, self.start_checker))

1409

self.start_checker() # Start one now, too

1410

2168

GLib.source_remove(self.checker_initiator_tag)

2169

self.checker_initiator_tag = GLib.timeout_add(

2170

value, self.start_checker)

2171

self.start_checker() # Start one now, too

2172

1411

2173

# Checker - property

1412

@dbus_service_property(_interface, signature="s",

2174

@dbus_service_property(_interface,

2175

signature="s",

1413

2176

access="readwrite")

1414

2177

def Checker_dbus_property(self, value=None):

1415

2178

if value is None: # get

1416

2179

return dbus.String(self.checker_command)

1417

self.checker_command = unicode(value)

1418

2180

self.checker_command = str(value)

2181

1419

2182

# CheckerRunning - property

1420

@dbus_service_property(_interface, signature="b",

2183

@dbus_service_property(_interface,

2184

signature="b",

1421

2185

access="readwrite")

1422

2186

def CheckerRunning_dbus_property(self, value=None):

1423

2187

if value is None: # get

1426

2190

self.start_checker()

1427

2191

else:

1428

2192

self.stop_checker()

1429

2193

1430

2194

# ObjectPath - property

2195

@dbus_annotations(

2196

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

2197

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

1431

2198

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

1432

2199

def ObjectPath_dbus_property(self):

1433

return self.dbus_object_path # is already a dbus.ObjectPath

1434

2200

return self.dbus_object_path # is already a dbus.ObjectPath

2201

1435

2202

# Secret = property

1436

@dbus_service_property(_interface, signature="ay",

1437

access="write", byte_arrays=True)

2203

@dbus_annotations(

2204

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

2205

"invalidates"})

2206

@dbus_service_property(_interface,

2207

signature="ay",

2208

access="write",

2209

byte_arrays=True)

1438

2210

def Secret_dbus_property(self, value):

1439

self.secret = str(value)

1440

2211

self.secret = bytes(value)

2212

1441

2213

del _interface

1442

2214

1443

2215

1444

2216

class ProxyClient(object):

1445

def __init__(self, child_pipe, fpr, address):

2217

def __init__(self, child_pipe, key_id, fpr, address):

1446

2218

self._pipe = child_pipe

1447

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

2219

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

1448

2220

if not self._pipe.recv():

1449

raise KeyError()

1450

2221

raise KeyError(key_id or fpr)

2222

1451

2223

def __getattribute__(self, name):

1452

2224

if name == '_pipe':

1453

2225

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

1456

2228

if data[0] == 'data':

1457

2229

return data[1]

1458

2230

if data[0] == 'function':

2231

1459

2232

def func(*args, **kwargs):

1460

2233

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

1461

2234

return self._pipe.recv()[1]

2235

1462

2236

return func

1463

2237

1464

2238

def __setattr__(self, name, value):

1465

2239

if name == '_pipe':

1466

2240

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

1467

2241

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

1468

2242

1469

2243

1470

class ClientDBusTransitional(ClientDBus):

1471

__metaclass__ = AlternateDBusNamesMetaclass

1472

1473

1474

2244

class ClientHandler(socketserver.BaseRequestHandler, object):

1475

2245

"""A class to handle client connections.

1476

2246

1477

2247

Instantiated once for each connection to handle it.

1478

2248

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

1479

2249

1480

2250

def handle(self):

1481

2251

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

1482

2252

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

1483

unicode(self.client_address))

2253

str(self.client_address))

1484

2254

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

1485

2255

self.server.child_pipe.fileno())

1486

1487

session = (gnutls.connection

1488

.ClientSession(self.request,

1489

gnutls.connection

1490

.X509Credentials()))

1491

1492

# Note: gnutls.connection.X509Credentials is really a

1493

# generic GnuTLS certificate credentials object so long as

1494

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

1495

# here despite using OpenPGP certificates.

1496

1497

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

1498

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

1499

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

1500

# "+DHE-DSS"))

2256

2257

session = gnutls.ClientSession(self.request)

2258

2259

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

2260

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

2261

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

2262

# "+DHE-DSS"))

1501

2263

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

1502

2264

priority = self.server.gnutls_priority

1503

2265

if priority is None:

1504

2266

priority = "NORMAL"

1505

(gnutls.library.functions

1506

.gnutls_priority_set_direct(session._c_object,

1507

priority, None))

1508

2267

gnutls.priority_set_direct(session._c_object,

2268

priority.encode("utf-8"),

2269

None)

2270

1509

2271

# Start communication using the Mandos protocol

1510

2272

# Get protocol number

1511

2273

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

1512

2274

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

1513

2275

try:

1514

2276

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

1515

raise RuntimeError

2277

raise RuntimeError(line)

1516

2278

except (ValueError, IndexError, RuntimeError) as error:

1517

2279

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

1518

2280

return

1519

2281

1520

2282

# Start GnuTLS connection

1521

2283

try:

1522

2284

session.handshake()

1523

except gnutls.errors.GNUTLSError as error:

2285

except gnutls.Error as error:

1524

2286

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

1525

2287

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

1526

2288

# established. Just abandon the request.

1527

2289

return

1528

2290

logger.debug("Handshake succeeded")

1529

2291

1530

2292

approval_required = False

1531

2293

try:

1532

try:

1533

fpr = self.fingerprint(self.peer_certificate

1534

(session))

1535

except (TypeError,

1536

gnutls.errors.GNUTLSError) as error:

1537

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

1538

return

1539

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

1540

1541

try:

1542

client = ProxyClient(child_pipe, fpr,

2294

if gnutls.has_rawpk:

2295

fpr = b""

2296

try:

2297

key_id = self.key_id(

2298

self.peer_certificate(session))

2299

except (TypeError, gnutls.Error) as error:

2300

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

2301

return

2302

logger.debug("Key ID: %s", key_id)

2303

2304

else:

2305

key_id = b""

2306

try:

2307

fpr = self.fingerprint(

2308

self.peer_certificate(session))

2309

except (TypeError, gnutls.Error) as error:

2310

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

2311

return

2312

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

2313

2314

try:

2315

client = ProxyClient(child_pipe, key_id, fpr,

1543

2316

self.client_address)

1544

2317

except KeyError:

1545

2318

return

1546

1547

if self.server.use_dbus:

1548

# Emit D-Bus signal

1549

client.NewRequest(unicode(self.client_address)[0])

1550

2319

1551

2320

if client.approval_delay:

1552

2321

delay = client.approval_delay

1553

2322

client.approvals_pending += 1

1554

2323

approval_required = True

1555

2324

1556

2325

while True:

1557

2326

if not client.enabled:

1558

2327

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

1559

client.name)

2328

client.name)

1560

2329

if self.server.use_dbus:

1561

2330

# Emit D-Bus signal

1562

2331

client.Rejected("Disabled")

1563

2332

return

1564

2333

1565

2334

if client.approved or not client.approval_delay:

1566

#We are approved or approval is disabled

2335

# We are approved or approval is disabled

1567

2336

break

1568

2337

elif client.approved is None:

1569

2338

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

1571

2340

if self.server.use_dbus:

1572

2341

# Emit D-Bus signal

1573

2342

client.NeedApproval(

1574

client.approval_delay_milliseconds(),

1575

client.approved_by_default)

2343

client.approval_delay.total_seconds()

2344

* 1000, client.approved_by_default)

1576

2345

else:

1577

2346

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

1578

2347

client.name)

1580

2349

# Emit D-Bus signal

1581

2350

client.Rejected("Denied")

1582

2351

return

1583

1584

#wait until timeout or approved

2352

2353

# wait until timeout or approved

1585

2354

time = datetime.datetime.now()

1586

2355

client.changedstate.acquire()

1587

(client.changedstate.wait

1588

(float(client.timedelta_to_milliseconds(delay)

1589

/ 1000)))

2356

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

1590

2357

client.changedstate.release()

1591

2358

time2 = datetime.datetime.now()

1592

2359

if (time2 - time) >= delay:

1602

2369

break

1603

2370

else:

1604

2371

delay -= time2 - time

1605

1606

sent_size = 0

1607

while sent_size < len(client.secret):

1608

try:

1609

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

1610

except gnutls.errors.GNUTLSError as error:

1611

logger.warning("gnutls send failed")

1612

return

1613

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

1614

sent, len(client.secret)

1615

- (sent_size + sent))

1616

sent_size += sent

1617

2372

2373

try:

2374

session.send(client.secret)

2375

except gnutls.Error as error:

2376

logger.warning("gnutls send failed",

2377

exc_info=error)

2378

return

2379

1618

2380

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

1619

2381

# bump the timeout using extended_timeout

1620

client.checked_ok(client.extended_timeout)

2382

client.bump_timeout(client.extended_timeout)

1621

2383

if self.server.use_dbus:

1622

2384

# Emit D-Bus signal

1623

2385

client.GotSecret()

1624

2386

1625

2387

finally:

1626

2388

if approval_required:

1627

2389

client.approvals_pending -= 1

1628

2390

try:

1629

2391

session.bye()

1630

except gnutls.errors.GNUTLSError as error:

1631

logger.warning("GnuTLS bye failed")

1632

2392

except gnutls.Error as error:

2393

logger.warning("GnuTLS bye failed",

2394

exc_info=error)

2395

1633

2396

@staticmethod

1634

2397

def peer_certificate(session):

1635

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

1636

# If not an OpenPGP certificate...

1637

if (gnutls.library.functions

1638

.gnutls_certificate_type_get(session._c_object)

1639

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1640

# ...do the normal thing

1641

return session.peer_certificate

2398

"Return the peer's certificate as a bytestring"

2399

try:

2400

cert_type = gnutls.certificate_type_get2(session._c_object,

2401

gnutls.CTYPE_PEERS)

2402

except AttributeError:

2403

cert_type = gnutls.certificate_type_get(session._c_object)

2404

if gnutls.has_rawpk:

2405

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2406

else:

2407

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2408

# If not a valid certificate type...

2409

if cert_type not in valid_cert_types:

2410

logger.info("Cert type %r not in %r", cert_type,

2411

valid_cert_types)

2412

# ...return invalid data

2413

return b""

1642

2414

list_size = ctypes.c_uint(1)

1643

cert_list = (gnutls.library.functions

1644

.gnutls_certificate_get_peers

2415

cert_list = (gnutls.certificate_get_peers

1645

2416

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

1646

2417

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

1647

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

1648

" certificate")

2418

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

1649

2419

if list_size.value == 0:

1650

2420

return None

1651

2421

cert = cert_list[0]

1652

2422

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

1653

2423

2424

@staticmethod

2425

def key_id(certificate):

2426

"Convert a certificate bytestring to a hexdigit key ID"

2427

# New GnuTLS "datum" with the public key

2428

datum = gnutls.datum_t(

2429

ctypes.cast(ctypes.c_char_p(certificate),

2430

ctypes.POINTER(ctypes.c_ubyte)),

2431

ctypes.c_uint(len(certificate)))

2432

# XXX all these need to be created in the gnutls "module"

2433

# New empty GnuTLS certificate

2434

pubkey = gnutls.pubkey_t()

2435

gnutls.pubkey_init(ctypes.byref(pubkey))

2436

# Import the raw public key into the certificate

2437

gnutls.pubkey_import(pubkey,

2438

ctypes.byref(datum),

2439

gnutls.X509_FMT_DER)

2440

# New buffer for the key ID

2441

buf = ctypes.create_string_buffer(32)

2442

buf_len = ctypes.c_size_t(len(buf))

2443

# Get the key ID from the raw public key into the buffer

2444

gnutls.pubkey_get_key_id(pubkey,

2445

gnutls.KEYID_USE_SHA256,

2446

ctypes.cast(ctypes.byref(buf),

2447

ctypes.POINTER(ctypes.c_ubyte)),

2448

ctypes.byref(buf_len))

2449

# Deinit the certificate

2450

gnutls.pubkey_deinit(pubkey)

2451

2452

# Convert the buffer to a Python bytestring

2453

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

2454

# Convert the bytestring to hexadecimal notation

2455

hex_key_id = binascii.hexlify(key_id).upper()

2456

return hex_key_id

2457

1654

2458

@staticmethod

1655

2459

def fingerprint(openpgp):

1656

2460

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1657

2461

# New GnuTLS "datum" with the OpenPGP public key

1658

datum = (gnutls.library.types

1659

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

1660

ctypes.POINTER

1661

(ctypes.c_ubyte)),

1662

ctypes.c_uint(len(openpgp))))

2462

datum = gnutls.datum_t(

2463

ctypes.cast(ctypes.c_char_p(openpgp),

2464

ctypes.POINTER(ctypes.c_ubyte)),

2465

ctypes.c_uint(len(openpgp)))

1663

2466

# New empty GnuTLS certificate

1664

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1665

(gnutls.library.functions

1666

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2467

crt = gnutls.openpgp_crt_t()

2468

gnutls.openpgp_crt_init(ctypes.byref(crt))

1667

2469

# Import the OpenPGP public key into the certificate

1668

(gnutls.library.functions

1669

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

1670

gnutls.library.constants

1671

.GNUTLS_OPENPGP_FMT_RAW))

2470

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

2471

gnutls.OPENPGP_FMT_RAW)

1672

2472

# Verify the self signature in the key

1673

2473

crtverify = ctypes.c_uint()

1674

(gnutls.library.functions

1675

.gnutls_openpgp_crt_verify_self(crt, 0,

1676

ctypes.byref(crtverify)))

2474

gnutls.openpgp_crt_verify_self(crt, 0,

2475

ctypes.byref(crtverify))

1677

2476

if crtverify.value != 0:

1678

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1679

raise (gnutls.errors.CertificateSecurityError

1680

("Verify failed"))

2477

gnutls.openpgp_crt_deinit(crt)

2478

raise gnutls.CertificateSecurityError(code

2479

=crtverify.value)

1681

2480

# New buffer for the fingerprint

1682

2481

buf = ctypes.create_string_buffer(20)

1683

2482

buf_len = ctypes.c_size_t()

1684

2483

# Get the fingerprint from the certificate into the buffer

1685

(gnutls.library.functions

1686

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

1687

ctypes.byref(buf_len)))

2484

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

2485

ctypes.byref(buf_len))

1688

2486

# Deinit the certificate

1689

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2487

gnutls.openpgp_crt_deinit(crt)

1690

2488

# Convert the buffer to a Python bytestring

1691

2489

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

1692

2490

# Convert the bytestring to hexadecimal notation

1696

2494

1697

2495

class MultiprocessingMixIn(object):

1698

2496

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

2497

1699

2498

def sub_process_main(self, request, address):

1700

2499

try:

1701

2500

self.finish_request(request, address)

1702

2501

except Exception:

1703

2502

self.handle_error(request, address)

1704

2503

self.close_request(request)

1705

2504

1706

2505

def process_request(self, request, address):

1707

2506

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

1708

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

1709

args = (request,

1710

address))

2507

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

2508

args=(request, address))

1711

2509

proc.start()

1712

2510

return proc

1713

2511

1714

2512

1715

2513

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1716

2514

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

2515

1717

2516

def process_request(self, request, client_address):

1718

2517

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

1719

2518

1720

2519

This function creates a new pipe in self.pipe

1721

2520

"""

1722

2521

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1723

2522

1724

2523

proc = MultiprocessingMixIn.process_request(self, request,

1725

2524

client_address)

1726

2525

self.child_pipe.close()

1727

2526

self.add_pipe(parent_pipe, proc)

1728

2527

1729

2528

def add_pipe(self, parent_pipe, proc):

1730

2529

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

1731

raise NotImplementedError

2530

raise NotImplementedError()

1732

2531

1733

2532

1734

2533

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1735

2534

socketserver.TCPServer, object):

1736

2535

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

1737

2536

1738

2537

Attributes:

1739

2538

enabled: Boolean; whether this server is activated yet

1740

2539

interface: None or a network interface name (string)

1741

2540

use_ipv6: Boolean; to use IPv6 or not

1742

2541

"""

2542

1743

2543

def __init__(self, server_address, RequestHandlerClass,

1744

interface=None, use_ipv6=True):

2544

interface=None,

2545

use_ipv6=True,

2546

socketfd=None):

2547

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

2548

creating a new one with socket.socket().

2549

"""

1745

2550

self.interface = interface

1746

2551

if use_ipv6:

1747

2552

self.address_family = socket.AF_INET6

2553

if socketfd is not None:

2554

# Save the file descriptor

2555

self.socketfd = socketfd

2556

# Save the original socket.socket() function

2557

self.socket_socket = socket.socket

2558

2559

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

2560

#

2561

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

2562

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

2563

# patching socket.socket.)

2564

#

2565

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

2566

@functools.wraps(socket.socket)

2567

def socket_wrapper(*args, **kwargs):

2568

# Restore original function so subsequent calls are

2569

# not affected.

2570

socket.socket = self.socket_socket

2571

del self.socket_socket

2572

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

2573

# saved file descriptor.

2574

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

2575

# Replace socket.socket() function with wrapper

2576

socket.socket = socket_wrapper

2577

# The socketserver.TCPServer.__init__ will call

2578

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

2579

# socket_wrapper(), if socketfd was set.

1748

2580

socketserver.TCPServer.__init__(self, server_address,

1749

2581

RequestHandlerClass)

2582

1750

2583

def server_bind(self):

1751

2584

"""This overrides the normal server_bind() function

1752

2585

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

1753

2586

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

2587

global SO_BINDTODEVICE

1754

2588

if self.interface is not None:

1755

2589

if SO_BINDTODEVICE is None:

1756

logger.error("SO_BINDTODEVICE does not exist;"

1757

" cannot bind to interface %s",

1758

self.interface)

1759

else:

1760

try:

1761

self.socket.setsockopt(socket.SOL_SOCKET,

1762

SO_BINDTODEVICE,

1763

str(self.interface

1764

+ '\0'))

1765

except socket.error as error:

1766

if error[0] == errno.EPERM:

1767

logger.error("No permission to"

1768

" bind to interface %s",

1769

self.interface)

1770

elif error[0] == errno.ENOPROTOOPT:

1771

logger.error("SO_BINDTODEVICE not available;"

1772

" cannot bind to interface %s",

1773

self.interface)

1774

else:

1775

raise

2590

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

2591

# common enough.

2592

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

2593

SO_BINDTODEVICE = 25

2594

try:

2595

self.socket.setsockopt(

2596

socket.SOL_SOCKET, SO_BINDTODEVICE,

2597

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

2598

except socket.error as error:

2599

if error.errno == errno.EPERM:

2600

logger.error("No permission to bind to"

2601

" interface %s", self.interface)

2602

elif error.errno == errno.ENOPROTOOPT:

2603

logger.error("SO_BINDTODEVICE not available;"

2604

" cannot bind to interface %s",

2605

self.interface)

2606

elif error.errno == errno.ENODEV:

2607

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

2608

" cannot bind", self.interface)

2609

else:

2610

raise

1776

2611

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

1777

2612

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

2613

if self.server_address[1]:

2614

self.allow_reuse_address = True

1778

2615

if not self.server_address[0]:

1779

2616

if self.address_family == socket.AF_INET6:

1780

any_address = "::" # in6addr_any

2617

any_address = "::" # in6addr_any

1781

2618

else:

1782

any_address = socket.INADDR_ANY

2619

any_address = "0.0.0.0" # INADDR_ANY

1783

2620

self.server_address = (any_address,

1784

2621

self.server_address[1])

1785

2622

elif not self.server_address[1]:

1786

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

1787

0)

2623

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

1788

2624

# if self.interface:

1789

2625

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

1790

2626

# 0, # port

1796

2632

1797

2633

class MandosServer(IPv6_TCPServer):

1798

2634

"""Mandos server.

1799

2635

1800

2636

Attributes:

1801

2637

clients: set of Client objects

1802

2638

gnutls_priority GnuTLS priority string

1803

2639

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

1804

1805

Assumes a gobject.MainLoop event loop.

2640

2641

Assumes a GLib.MainLoop event loop.

1806

2642

"""

2643

1807

2644

def __init__(self, server_address, RequestHandlerClass,

1808

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

1809

gnutls_priority=None, use_dbus=True):

2645

interface=None,

2646

use_ipv6=True,

2647

clients=None,

2648

gnutls_priority=None,

2649

use_dbus=True,

2650

socketfd=None):

1810

2651

self.enabled = False

1811

2652

self.clients = clients

1812

2653

if self.clients is None:

1815

2656

self.gnutls_priority = gnutls_priority

1816

2657

IPv6_TCPServer.__init__(self, server_address,

1817

2658

RequestHandlerClass,

1818

interface = interface,

1819

use_ipv6 = use_ipv6)

2659

interface=interface,

2660

use_ipv6=use_ipv6,

2661

socketfd=socketfd)

2662

1820

2663

def server_activate(self):

1821

2664

if self.enabled:

1822

2665

return socketserver.TCPServer.server_activate(self)

1823

2666

1824

2667

def enable(self):

1825

2668

self.enabled = True

1826

2669

1827

2670

def add_pipe(self, parent_pipe, proc):

1828

2671

# Call "handle_ipc" for both data and EOF events

1829

gobject.io_add_watch(parent_pipe.fileno(),

1830

gobject.IO_IN | gobject.IO_HUP,

1831

functools.partial(self.handle_ipc,

1832

parent_pipe =

1833

parent_pipe,

1834

proc = proc))

1835

1836

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

1837

proc = None, client_object=None):

1838

condition_names = {

1839

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

1840

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

1841

# blocking).

1842

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

1843

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

1844

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

1845

# broken, usually for pipes and

1846

# sockets).

1847

}

1848

conditions_string = ' | '.join(name

1849

for cond, name in

1850

condition_names.iteritems()

1851

if cond & condition)

2672

GLib.io_add_watch(

2673

parent_pipe.fileno(),

2674

GLib.IO_IN | GLib.IO_HUP,

2675

functools.partial(self.handle_ipc,

2676

parent_pipe=parent_pipe,

2677

proc=proc))

2678

2679

def handle_ipc(self, source, condition,

2680

parent_pipe=None,

2681

proc=None,

2682

client_object=None):

1852

2683

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

1853

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

2684

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

1854

2685

# Wait for other process to exit

1855

2686

proc.join()

1856

2687

return False

1857

2688

1858

2689

# Read a request from the child

1859

2690

request = parent_pipe.recv()

1860

2691

command = request[0]

1861

2692

1862

2693

if command == 'init':

1863

fpr = request[1]

1864

address = request[2]

1865

1866

for c in self.clients.itervalues():

1867

if c.fingerprint == fpr:

2694

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

2695

fpr = request[2].decode("ascii")

2696

address = request[3]

2697

2698

for c in self.clients.values():

2699

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2700

continue

2701

if key_id and c.key_id == key_id:

2702

client = c

2703

break

2704

if fpr and c.fingerprint == fpr:

1868

2705

client = c

1869

2706

break

1870

2707

else:

1871

logger.info("Client not found for fingerprint: %s, ad"

1872

"dress: %s", fpr, address)

2708

logger.info("Client not found for key ID: %s, address"

2709

": %s", key_id or fpr, address)

1873

2710

if self.use_dbus:

1874

2711

# Emit D-Bus signal

1875

mandos_dbus_service.ClientNotFound(fpr,

2712

mandos_dbus_service.ClientNotFound(key_id or fpr,

1876

2713

address[0])

1877

2714

parent_pipe.send(False)

1878

2715

return False

1879

1880

gobject.io_add_watch(parent_pipe.fileno(),

1881

gobject.IO_IN | gobject.IO_HUP,

1882

functools.partial(self.handle_ipc,

1883

parent_pipe =

1884

parent_pipe,

1885

proc = proc,

1886

client_object =

1887

client))

2716

2717

GLib.io_add_watch(

2718

parent_pipe.fileno(),

2719

GLib.IO_IN | GLib.IO_HUP,

2720

functools.partial(self.handle_ipc,

2721

parent_pipe=parent_pipe,

2722

proc=proc,

2723

client_object=client))

1888

2724

parent_pipe.send(True)

1889

2725

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

1890

2726

# same fileno

1893

2729

funcname = request[1]

1894

2730

args = request[2]

1895

2731

kwargs = request[3]

1896

2732

1897

2733

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

1898

2734

funcname)(*args,

1899

**kwargs)))

1900

2735

**kwargs)))

2736

1901

2737

if command == 'getattr':

1902

2738

attrname = request[1]

1903

if callable(client_object.__getattribute__(attrname)):

1904

parent_pipe.send(('function',))

2739

if isinstance(client_object.__getattribute__(attrname),

2740

collections.Callable):

2741

parent_pipe.send(('function', ))

1905

2742

else:

1906

parent_pipe.send(('data', client_object

1907

.__getattribute__(attrname)))

1908

2743

parent_pipe.send((

2744

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

2745

1909

2746

if command == 'setattr':

1910

2747

attrname = request[1]

1911

2748

value = request[2]

1912

2749

setattr(client_object, attrname, value)

1913

2750

1914

2751

return True

1915

2752

1916

2753

2754

def rfc3339_duration_to_delta(duration):

2755

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

2756

2757

>>> rfc3339_duration_to_delta("P7D")

2758

datetime.timedelta(7)

2759

>>> rfc3339_duration_to_delta("PT60S")

2760

datetime.timedelta(0, 60)

2761

>>> rfc3339_duration_to_delta("PT60M")

2762

datetime.timedelta(0, 3600)

2763

>>> rfc3339_duration_to_delta("PT24H")

2764

datetime.timedelta(1)

2765

>>> rfc3339_duration_to_delta("P1W")

2766

datetime.timedelta(7)

2767

>>> rfc3339_duration_to_delta("PT5M30S")

2768

datetime.timedelta(0, 330)

2769

>>> rfc3339_duration_to_delta("P1DT3M20S")

2770

datetime.timedelta(1, 200)

2771

"""

2772

2773

# Parsing an RFC 3339 duration with regular expressions is not

2774

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

2775

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

2776

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

2777

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

2778

# avoid excessive use of external libraries.

2779

2780

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

2781

Token = collections.namedtuple("Token", (

2782

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

2783

# a "group" containing digits

2784

"value", # datetime.timedelta or None

2785

"followers")) # Tokens valid after this token

2786

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

2787

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

2788

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

2789

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

2790

datetime.timedelta(seconds=1),

2791

frozenset((token_end, )))

2792

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

2793

datetime.timedelta(minutes=1),

2794

frozenset((token_second, token_end)))

2795

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

2796

datetime.timedelta(hours=1),

2797

frozenset((token_minute, token_end)))

2798

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

2799

None,

2800

frozenset((token_hour, token_minute,

2801

token_second)))

2802

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

2803

datetime.timedelta(days=1),

2804

frozenset((token_time, token_end)))

2805

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

2806

datetime.timedelta(weeks=4),

2807

frozenset((token_day, token_end)))

2808

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

2809

datetime.timedelta(weeks=52),

2810

frozenset((token_month, token_end)))

2811

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

2812

datetime.timedelta(weeks=1),

2813

frozenset((token_end, )))

2814

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

2815

frozenset((token_year, token_month,

2816

token_day, token_time,

2817

token_week)))

2818

# Define starting values:

2819

# Value so far

2820

value = datetime.timedelta()

2821

found_token = None

2822

# Following valid tokens

2823

followers = frozenset((token_duration, ))

2824

# String left to parse

2825

s = duration

2826

# Loop until end token is found

2827

while found_token is not token_end:

2828

# Search for any currently valid tokens

2829

for token in followers:

2830

match = token.regexp.match(s)

2831

if match is not None:

2832

# Token found

2833

if token.value is not None:

2834

# Value found, parse digits

2835

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

2836

# Add to value so far

2837

value += factor * token.value

2838

# Strip token from string

2839

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

2840

# Go to found token

2841

found_token = token

2842

# Set valid next tokens

2843

followers = found_token.followers

2844

break

2845

else:

2846

# No currently valid tokens were found

2847

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

2848

.format(duration))

2849

# End token found

2850

return value

2851

2852

1917

2853

def string_to_delta(interval):

1918

2854

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

1919

2855

1920

2856

>>> string_to_delta('7d')

1921

2857

datetime.timedelta(7)

1922

2858

>>> string_to_delta('60s')

1930

2866

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

1931

2867

datetime.timedelta(0, 330)

1932

2868

"""

2869

2870

try:

2871

return rfc3339_duration_to_delta(interval)

2872

except ValueError:

2873

pass

2874

1933

2875

timevalue = datetime.timedelta(0)

1934

2876

for s in interval.split():

1935

2877

try:

1936

suffix = unicode(s[-1])

2878

suffix = s[-1]

1937

2879

value = int(s[:-1])

1938

2880

if suffix == "d":

1939

2881

delta = datetime.timedelta(value)

1946

2888

elif suffix == "w":

1947

2889

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

1948

2890

else:

1949

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

1950

except (ValueError, IndexError) as e:

2891

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

2892

except IndexError as e:

1951

2893

raise ValueError(*(e.args))

1952

2894

timevalue += delta

1953

2895

return timevalue

1954

2896

1955

2897

1956

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

2898

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

1957

2899

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

1958

2900

1959

2901

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

1960

2902

if os.fork():

1961

2903

sys.exit()

1966

2908

sys.exit()

1967

2909

if not noclose:

1968

2910

# Close all standard open file descriptors

1969

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

2911

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

1970

2912

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

1971

2913

raise OSError(errno.ENODEV,

1972

"%s not a character device"

1973

% os.path.devnull)

2914

"{} not a character device"

2915

.format(os.devnull))

1974

2916

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

1975

2917

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

1976

2918

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

1979

2921

1980

2922

1981

2923

def main():

1982

2924

1983

2925

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

1984

2926

# Parsing of options, both command line and config file

1985

2927

1986

2928

parser = argparse.ArgumentParser()

1987

2929

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

1988

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

2930

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

1989

2931

help="show version number and exit")

1990

2932

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

1991

2933

help="Bind to interface IF")

1997

2939

help="Run self-test")

1998

2940

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

1999

2941

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

2000

" to terminal")

2942

" to terminal", default=None)

2001

2943

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

2002

2944

help="Debug level for stdout output")

2003

2945

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

2010

2952

" files")

2011

2953

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

2012

2954

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

2013

" system bus interface")

2955

" system bus interface", default=None)

2014

2956

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

2015

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

2957

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

2958

default=None)

2016

2959

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

2017

2960

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

2018

" state")

2961

" state", default=None)

2962

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

2963

help="Specify a file descriptor to a network"

2964

" socket to use instead of creating one")

2019

2965

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

2020

2966

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

2021

2967

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

2968

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

2969

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

2970

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

2971

default=None)

2972

2022

2973

options = parser.parse_args()

2023

2974

2024

2975

if options.check:

2025

2976

import doctest

2026

doctest.testmod()

2027

sys.exit()

2028

2977

fail_count, test_count = doctest.testmod()

2978

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

2979

2029

2980

# Default values for config file for server-global settings

2030

server_defaults = { "interface": "",

2031

"address": "",

2032

"port": "",

2033

"debug": "False",

2034

"priority":

2035

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

2036

"servicename": "Mandos",

2037

"use_dbus": "True",

2038

"use_ipv6": "True",

2039

"debuglevel": "",

2040

"restore": "True",

2041

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

2042

}

2043

2981

if gnutls.has_rawpk:

2982

priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"

2983

":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")

2984

else:

2985

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

2986

":+SIGN-DSA-SHA256")

2987

server_defaults = {"interface": "",

2988

"address": "",

2989

"port": "",

2990

"debug": "False",

2991

"priority": priority,

2992

"servicename": "Mandos",

2993

"use_dbus": "True",

2994

"use_ipv6": "True",

2995

"debuglevel": "",

2996

"restore": "True",

2997

"socket": "",

2998

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

2999

"foreground": "False",

3000

"zeroconf": "True",

3001

}

3002

del priority

3003

2044

3004

# Parse config file for server-global settings

2045

server_config = configparser.SafeConfigParser(server_defaults)

3005

server_config = configparser.ConfigParser(server_defaults)

2046

3006

del server_defaults

2047

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

2048

"mandos.conf"))

2049

# Convert the SafeConfigParser object to a dict

3007

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

3008

# Convert the ConfigParser object to a dict

2050

3009

server_settings = server_config.defaults()

2051

3010

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

2052

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

3011

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

3012

"foreground", "zeroconf"):

2053

3013

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

2054

3014

option)

2055

3015

if server_settings["port"]:

2056

3016

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

2057

3017

"port")

3018

if server_settings["socket"]:

3019

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

3020

"socket")

3021

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

3022

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

3023

# happen with a supplied network socket.

3024

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

3025

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

3026

["socket"])

2058

3027

del server_config

2059

3028

2060

3029

# Override the settings from the config file with command line

2061

3030

# options, if set.

2062

3031

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

2063

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

2064

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

2065

"statedir"):

3032

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

3033

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

3034

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

2066

3035

value = getattr(options, option)

2067

3036

if value is not None:

2068

3037

server_settings[option] = value

2069

3038

del options

2070

3039

# Force all strings to be unicode

2071

3040

for option in server_settings.keys():

2072

if type(server_settings[option]) is str:

2073

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

3041

if isinstance(server_settings[option], bytes):

3042

server_settings[option] = (server_settings[option]

3043

.decode("utf-8"))

3044

# Force all boolean options to be boolean

3045

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

3046

"foreground", "zeroconf"):

3047

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

3048

# Debug implies foreground

3049

if server_settings["debug"]:

3050

server_settings["foreground"] = True

2074

3051

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

2075

3052

2076

3053

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

2077

3054

3055

if (not server_settings["zeroconf"]

3056

and not (server_settings["port"]

3057

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

3058

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

3059

2078

3060

# For convenience

2079

3061

debug = server_settings["debug"]

2080

3062

debuglevel = server_settings["debuglevel"]

2082

3064

use_ipv6 = server_settings["use_ipv6"]

2083

3065

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

2084

3066

stored_state_file)

2085

3067

foreground = server_settings["foreground"]

3068

zeroconf = server_settings["zeroconf"]

3069

2086

3070

if debug:

2087

3071

initlogger(debug, logging.DEBUG)

2088

3072

else:

2091

3075

else:

2092

3076

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

2093

3077

initlogger(debug, level)

2094

3078

2095

3079

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

2096

syslogger.setFormatter(logging.Formatter

2097

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

2098

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

2099

% server_settings["servicename"]))

2100

3080

syslogger.setFormatter(

3081

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

3082

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

3083

server_settings["servicename"])))

3084

2101

3085

# Parse config file with clients

2102

client_config = configparser.SafeConfigParser(Client

2103

.client_defaults)

3086

client_config = configparser.ConfigParser(Client.client_defaults)

2104

3087

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

2105

3088

"clients.conf"))

2106

3089

2107

3090

global mandos_dbus_service

2108

3091

mandos_dbus_service = None

2109

2110

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

2111

server_settings["port"]),

2112

ClientHandler,

2113

interface=(server_settings["interface"]

2114

or None),

2115

use_ipv6=use_ipv6,

2116

gnutls_priority=

2117

server_settings["priority"],

2118

use_dbus=use_dbus)

2119

if not debug:

2120

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

2121

try:

2122

pidfile = open(pidfilename, "w")

2123

except IOError:

2124

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

2125

2126

try:

2127

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

2128

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

2129

except KeyError:

2130

try:

2131

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

2132

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

3092

3093

socketfd = None

3094

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

3095

socketfd = server_settings["socket"]

3096

tcp_server = MandosServer(

3097

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

3098

ClientHandler,

3099

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

3100

use_ipv6=use_ipv6,

3101

gnutls_priority=server_settings["priority"],

3102

use_dbus=use_dbus,

3103

socketfd=socketfd)

3104

if not foreground:

3105

pidfilename = "/run/mandos.pid"

3106

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

3107

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

3108

pidfile = None

3109

try:

3110

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

3111

except IOError as e:

3112

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

3113

exc_info=e)

3114

3115

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

3116

("mandos", "mandos"),

3117

("nobody", "nogroup")):

3118

try:

3119

uid = pwd.getpwnam(name).pw_uid

3120

gid = pwd.getpwnam(group).pw_gid

3121

break

2133

3122

except KeyError:

2134

try:

2135

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

2136

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

2137

except KeyError:

2138

uid = 65534

2139

gid = 65534

3123

continue

3124

else:

3125

uid = 65534

3126

gid = 65534

2140

3127

try:

2141

3128

os.setgid(gid)

2142

3129

os.setuid(uid)

3130

if debug:

3131

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

3132

gid))

2143

3133

except OSError as error:

2144

if error[0] != errno.EPERM:

2145

raise error

2146

3134

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

3135

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

3136

if error.errno != errno.EPERM:

3137

raise

3138

2147

3139

if debug:

2148

3140

# Enable all possible GnuTLS debugging

2149

3141

2150

3142

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

2151

3143

# - GnuTLS manual

2152

gnutls.library.functions.gnutls_global_set_log_level(11)

2153

2154

@gnutls.library.types.gnutls_log_func

3144

gnutls.global_set_log_level(11)

3145

3146

@gnutls.log_func

2155

3147

def debug_gnutls(level, string):

2156

3148

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

2157

2158

(gnutls.library.functions

2159

.gnutls_global_set_log_function(debug_gnutls))

2160

3149

3150

gnutls.global_set_log_function(debug_gnutls)

3151

2161

3152

# Redirect stdin so all checkers get /dev/null

2162

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

3153

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

2163

3154

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

2164

3155

if null > 2:

2165

3156

os.close(null)

2166

3157

2167

3158

# Need to fork before connecting to D-Bus

2168

if not debug:

3159

if not foreground:

2169

3160

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

2170

3161

daemon()

2171

2172

gobject.threads_init()

2173

3162

3163

if gi.version_info < (3, 10, 2):

3164

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

3165

# need to inform GLib that threads will be used.

3166

GLib.threads_init()

3167

2174

3168

global main_loop

2175

3169

# From the Avahi example code

2176

DBusGMainLoop(set_as_default=True )

2177

main_loop = gobject.MainLoop()

3170

DBusGMainLoop(set_as_default=True)

3171

main_loop = GLib.MainLoop()

2178

3172

bus = dbus.SystemBus()

2179

3173

# End of Avahi example code

2180

3174

if use_dbus:

2181

3175

try:

2182

3176

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

2183

bus, do_not_queue=True)

2184

old_bus_name = (dbus.service.BusName

2185

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

2186

do_not_queue=True))

2187

except dbus.exceptions.NameExistsException as e:

2188

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

3177

bus,

3178

do_not_queue=True)

3179

old_bus_name = dbus.service.BusName(

3180

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

3181

do_not_queue=True)

3182

except dbus.exceptions.DBusException as e:

3183

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

2189

3184

use_dbus = False

2190

3185

server_settings["use_dbus"] = False

2191

3186

tcp_server.use_dbus = False

2192

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2193

service = AvahiServiceToSyslog(name =

2194

server_settings["servicename"],

2195

servicetype = "_mandos._tcp",

2196

protocol = protocol, bus = bus)

2197

if server_settings["interface"]:

2198

service.interface = (if_nametoindex

2199

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

2200

3187

if zeroconf:

3188

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3189

service = AvahiServiceToSyslog(

3190

name=server_settings["servicename"],

3191

servicetype="_mandos._tcp",

3192

protocol=protocol,

3193

bus=bus)

3194

if server_settings["interface"]:

3195

service.interface = if_nametoindex(

3196

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

3197

2201

3198

global multiprocessing_manager

2202

3199

multiprocessing_manager = multiprocessing.Manager()

2203

3200

2204

3201

client_class = Client

2205

3202

if use_dbus:

2206

client_class = functools.partial(ClientDBusTransitional,

2207

bus = bus)

2208

3203

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

3204

2209

3205

client_settings = Client.config_parser(client_config)

2210

3206

old_client_settings = {}

2211

3207

clients_data = {}

2212

3208

3209

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

3210

global wnull

3211

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

3212

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

3213

# mode

3214

if debug or not foreground:

3215

wnull.close()

3216

2213

3217

# Get client data and settings from last running state.

2214

3218

if server_settings["restore"]:

2215

3219

try:

2216

3220

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

2217

clients_data, old_client_settings = (pickle.load

2218

(stored_state))

3221

if sys.version_info.major == 2:

3222

clients_data, old_client_settings = pickle.load(

3223

stored_state)

3224

else:

3225

bytes_clients_data, bytes_old_client_settings = (

3226

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

3227

# Fix bytes to strings

3228

# clients_data

3229

# .keys()

3230

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

3231

if isinstance(key, bytes)

3232

else key): value

3233

for key, value in

3234

bytes_clients_data.items()}

3235

del bytes_clients_data

3236

for key in clients_data:

3237

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

3238

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

3239

for k, v in

3240

clients_data[key].items()}

3241

clients_data[key] = value

3242

# .client_structure

3243

value["client_structure"] = [

3244

(s.decode("utf-8")

3245

if isinstance(s, bytes)

3246

else s) for s in

3247

value["client_structure"]]

3248

# .name & .host

3249

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

3250

if isinstance(value[k], bytes):

3251

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

3252

if "key_id" not in value:

3253

value["key_id"] = ""

3254

elif "fingerprint" not in value:

3255

value["fingerprint"] = ""

3256

# old_client_settings

3257

# .keys()

3258

old_client_settings = {

3259

(key.decode("utf-8")

3260

if isinstance(key, bytes)

3261

else key): value

3262

for key, value in

3263

bytes_old_client_settings.items()}

3264

del bytes_old_client_settings

3265

# .host

3266

for value in old_client_settings.values():

3267

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

3268

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

3269

.decode("utf-8"))

2219

3270

os.remove(stored_state_path)

2220

3271

except IOError as e:

2221

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

2222

.format(e))

2223

if e.errno != errno.ENOENT:

3272

if e.errno == errno.ENOENT:

3273

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

3274

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

3275

else:

3276

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

3277

exc_info=e)

2224

3278

raise

2225

3279

except EOFError as e:

2226

3280

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

2227

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

2228

3281

"EOFError:",

3282

exc_info=e)

3283

2229

3284

with PGPEngine() as pgp:

2230

for client_name, client in clients_data.iteritems():

3285

for client_name, client in clients_data.items():

3286

# Skip removed clients

3287

if client_name not in client_settings:

3288

continue

3289

2231

3290

# Decide which value to use after restoring saved state.

2232

3291

# We have three different values: Old config file,

2233

3292

# new config file, and saved state.

2238

3297

# For each value in new config, check if it

2239

3298

# differs from the old config value (Except for

2240

3299

# the "secret" attribute)

2241

if (name != "secret" and

2242

value != old_client_settings[client_name]

2243

[name]):

3300

if (name != "secret"

3301

and (value !=

3302

old_client_settings[client_name][name])):

2244

3303

client[name] = value

2245

3304

except KeyError:

2246

3305

pass

2247

3306

2248

3307

# Clients who has passed its expire date can still be

2249

# enabled if its last checker was successful. Clients

3308

# enabled if its last checker was successful. A Client

2250

3309

# whose checker succeeded before we stored its state is

2251

3310

# assumed to have successfully run all checkers during

2252

3311

# downtime.

2254

3313

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

2255

3314

if not client["last_checked_ok"]:

2256

3315

logger.warning(

2257

"disabling client {0} - Client never "

2258

"performed a successful checker"

2259

.format(client_name))

3316

"disabling client {} - Client never "

3317

"performed a successful checker".format(

3318

client_name))

2260

3319

client["enabled"] = False

2261

3320

elif client["last_checker_status"] != 0:

2262

3321

logger.warning(

2263

"disabling client {0} - Client "

2264

"last checker failed with error code {1}"

2265

.format(client_name,

2266

client["last_checker_status"]))

3322

"disabling client {} - Client last"

3323

" checker failed with error code"

3324

" {}".format(

3325

client_name,

3326

client["last_checker_status"]))

2267

3327

client["enabled"] = False

2268

3328

else:

2269

client["expires"] = (datetime.datetime

2270

.utcnow()

2271

+ client["timeout"])

3329

client["expires"] = (

3330

datetime.datetime.utcnow()

3331

+ client["timeout"])

2272

3332

logger.debug("Last checker succeeded,"

2273

" keeping {0} enabled"

2274

.format(client_name))

3333

" keeping {} enabled".format(

3334

client_name))

2275

3335

try:

2276

client["secret"] = (

2277

pgp.decrypt(client["encrypted_secret"],

2278

client_settings[client_name]

2279

["secret"]))

3336

client["secret"] = pgp.decrypt(

3337

client["encrypted_secret"],

3338

client_settings[client_name]["secret"])

2280

3339

except PGPError:

2281

3340

# If decryption fails, we use secret from new settings

2282

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

2283

.format(client_name))

2284

client["secret"] = (

2285

client_settings[client_name]["secret"])

3341

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

3342

client_name))

3343

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

3344

["secret"])

2286

3345

2287

2288

3346

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

2289

3347

for client_name in (set(old_client_settings)

2290

3348

- set(client_settings)):

2294

3352

clients_data[client_name] = client_settings[client_name]

2295

3353

2296

3354

# Create all client objects

2297

for client_name, client in clients_data.iteritems():

3355

for client_name, client in clients_data.items():

2298

3356

tcp_server.clients[client_name] = client_class(

2299

name = client_name, settings = client)

2300

3357

name=client_name,

3358

settings=client,

3359

server_settings=server_settings)

3360

2301

3361

if not tcp_server.clients:

2302

3362

logger.warning("No clients defined")

2303

2304

if not debug:

2305

try:

2306

with pidfile:

2307

pid = os.getpid()

2308

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

2309

del pidfile

2310

except IOError:

2311

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

2312

pidfilename, pid)

2313

except NameError:

2314

# "pidfile" was never created

2315

pass

3363

3364

if not foreground:

3365

if pidfile is not None:

3366

pid = os.getpid()

3367

try:

3368

with pidfile:

3369

print(pid, file=pidfile)

3370

except IOError:

3371

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

3372

pidfilename, pid)

3373

del pidfile

2316

3374

del pidfilename

2317

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

2318

2319

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

2320

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

2321

3375

3376

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

3377

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3378

lambda: main_loop.quit() and False)

3379

2322

3380

if use_dbus:

2323

class MandosDBusService(dbus.service.Object):

3381

3382

@alternate_dbus_interfaces(

3383

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

3384

class MandosDBusService(DBusObjectWithObjectManager):

2324

3385

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

3386

2325

3387

def __init__(self):

2326

3388

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

3389

2327

3390

_interface = "se.recompile.Mandos"

2328

3391

2329

3392

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

2330

3393

def ClientAdded(self, objpath):

2331

3394

"D-Bus signal"

2332

3395

pass

2333

3396

2334

3397

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

2335

def ClientNotFound(self, fingerprint, address):

3398

def ClientNotFound(self, key_id, address):

2336

3399

"D-Bus signal"

2337

3400

pass

2338

3401

3402

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

3403

"true"})

2339

3404

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

2340

3405

def ClientRemoved(self, objpath, name):

2341

3406

"D-Bus signal"

2342

3407

pass

2343

3408

3409

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

3410

"true"})

2344

3411

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

2345

3412

def GetAllClients(self):

2346

3413

"D-Bus method"

2347

return dbus.Array(c.dbus_object_path

2348

for c in

2349

tcp_server.clients.itervalues())

2350

3414

return dbus.Array(c.dbus_object_path for c in

3415

tcp_server.clients.values())

3416

3417

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

3418

"true"})

2351

3419

@dbus.service.method(_interface,

2352

3420

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

2353

3421

def GetAllClientsWithProperties(self):

2354

3422

"D-Bus method"

2355

3423

return dbus.Dictionary(

2356

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

2357

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

3424

{c.dbus_object_path: c.GetAll(

3425

"se.recompile.Mandos.Client")

3426

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

2358

3427

signature="oa{sv}")

2359

3428

2360

3429

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

2361

3430

def RemoveClient(self, object_path):

2362

3431

"D-Bus method"

2363

for c in tcp_server.clients.itervalues():

3432

for c in tcp_server.clients.values():

2364

3433

if c.dbus_object_path == object_path:

2365

3434

del tcp_server.clients[c.name]

2366

3435

c.remove_from_connection()

2367

# Don't signal anything except ClientRemoved

3436

# Don't signal the disabling

2368

3437

c.disable(quiet=True)

2369

# Emit D-Bus signal

2370

self.ClientRemoved(object_path, c.name)

3438

# Emit D-Bus signal for removal

3439

self.client_removed_signal(c)

2371

3440

return

2372

3441

raise KeyError(object_path)

2373

3442

2374

3443

del _interface

2375

2376

class MandosDBusServiceTransitional(MandosDBusService):

2377

__metaclass__ = AlternateDBusNamesMetaclass

2378

mandos_dbus_service = MandosDBusServiceTransitional()

2379

3444

3445

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3446

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

3447

def GetManagedObjects(self):

3448

"""D-Bus method"""

3449

return dbus.Dictionary(

3450

{client.dbus_object_path:

3451

dbus.Dictionary(

3452

{interface: client.GetAll(interface)

3453

for interface in

3454

client._get_all_interface_names()})

3455

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

3456

3457

def client_added_signal(self, client):

3458

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

3459

if use_dbus:

3460

# New standard signal

3461

self.InterfacesAdded(

3462

client.dbus_object_path,

3463

dbus.Dictionary(

3464

{interface: client.GetAll(interface)

3465

for interface in

3466

client._get_all_interface_names()}))

3467

# Old signal

3468

self.ClientAdded(client.dbus_object_path)

3469

3470

def client_removed_signal(self, client):

3471

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

3472

if use_dbus:

3473

# New standard signal

3474

self.InterfacesRemoved(

3475

client.dbus_object_path,

3476

client._get_all_interface_names())

3477

# Old signal

3478

self.ClientRemoved(client.dbus_object_path,

3479

client.name)

3480

3481

mandos_dbus_service = MandosDBusService()

3482

3483

# Save modules to variables to exempt the modules from being

3484

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

3485

mp = multiprocessing

3486

wn = wnull

3487

2380

3488

def cleanup():

2381

3489

"Cleanup function; run on exit"

2382

service.cleanup()

2383

2384

multiprocessing.active_children()

3490

if zeroconf:

3491

service.cleanup()

3492

3493

mp.active_children()

3494

wn.close()

2385

3495

if not (tcp_server.clients or client_settings):

2386

3496

return

2387

3497

2388

3498

# Store client before exiting. Secrets are encrypted with key

2389

3499

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

2390

3500

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

2391

3501

clients = {}

2392

3502

with PGPEngine() as pgp:

2393

for client in tcp_server.clients.itervalues():

3503

for client in tcp_server.clients.values():

2394

3504

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

2395

3505

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

2396

3506

key)

2397

3507

client_dict = {}

2398

3508

2399

3509

# A list of attributes that can not be pickled

2400

3510

# + secret.

2401

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

2402

"checker"))

2403

for name, typ in (inspect.getmembers

2404

(dbus.service.Object)):

3511

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

3512

"checker", "server_settings"}

3513

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

3514

.Object):

2405

3515

exclude.add(name)

2406

3516

2407

3517

client_dict["encrypted_secret"] = (client

2408

3518

.encrypted_secret)

2409

3519

for attr in client.client_structure:

2410

3520

if attr not in exclude:

2411

3521

client_dict[attr] = getattr(client, attr)

2412

3522

2413

3523

clients[client.name] = client_dict

2414

3524

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

2415

3525

2416

3526

try:

2417

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

2418

prefix="clients-",

2419

dir=os.path.dirname

2420

(stored_state_path))

2421

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

2422

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

3527

with tempfile.NamedTemporaryFile(

3528

mode='wb',

3529

suffix=".pickle",

3530

prefix='clients-',

3531

dir=os.path.dirname(stored_state_path),

3532

delete=False) as stored_state:

3533

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

3534

protocol=2)

3535

tempname = stored_state.name

2423

3536

os.rename(tempname, stored_state_path)

2424

3537

except (IOError, OSError) as e:

2425

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

2426

.format(e))

2427

3538

if not debug:

2428

3539

try:

2429

3540

os.remove(tempname)

2430

3541

except NameError:

2431

3542

pass

2432

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

2433

errno.EEXIST)):

2434

raise e

2435

3543

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

3544

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

3545

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

3546

else:

3547

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

3548

exc_info=e)

3549

raise

3550

2436

3551

# Delete all clients, and settings from config

2437

3552

while tcp_server.clients:

2438

3553

name, client = tcp_server.clients.popitem()

2439

3554

if use_dbus:

2440

3555

client.remove_from_connection()

2441

# Don't signal anything except ClientRemoved

3556

# Don't signal the disabling

2442

3557

client.disable(quiet=True)

3558

# Emit D-Bus signal for removal

2443

3559

if use_dbus:

2444

# Emit D-Bus signal

2445

mandos_dbus_service.ClientRemoved(client

2446

.dbus_object_path,

2447

client.name)

3560

mandos_dbus_service.client_removed_signal(client)

2448

3561

client_settings.clear()

2449

3562

2450

3563

atexit.register(cleanup)

2451

2452

for client in tcp_server.clients.itervalues():

3564

3565

for client in tcp_server.clients.values():

2453

3566

if use_dbus:

2454

# Emit D-Bus signal

2455

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3567

# Emit D-Bus signal for adding

3568

mandos_dbus_service.client_added_signal(client)

2456

3569

# Need to initiate checking of clients

2457

3570

if client.enabled:

2458

3571

client.init_checker()

2459

3572

2460

3573

tcp_server.enable()

2461

3574

tcp_server.server_activate()

2462

3575

2463

3576

# Find out what port we got

2464

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

3577

if zeroconf:

3578

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

2465

3579

if use_ipv6:

2466

3580

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

2467

" flowinfo %d, scope_id %d"

2468

% tcp_server.socket.getsockname())

3581

" flowinfo %d, scope_id %d",

3582

*tcp_server.socket.getsockname())

2469

3583

else: # IPv4

2470

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

2471

% tcp_server.socket.getsockname())

2472

2473

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

2474

3584

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

3585

*tcp_server.socket.getsockname())

3586

3587

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

3588

2475

3589

try:

2476

# From the Avahi example code

2477

try:

2478

service.activate()

2479

except dbus.exceptions.DBusException as error:

2480

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

2481

cleanup()

2482

sys.exit(1)

2483

# End of Avahi example code

2484

2485

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

2486

lambda *args, **kwargs:

2487

(tcp_server.handle_request

2488

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

2489

3590

if zeroconf:

3591

# From the Avahi example code

3592

try:

3593

service.activate()

3594

except dbus.exceptions.DBusException as error:

3595

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

3596

cleanup()

3597

sys.exit(1)

3598

# End of Avahi example code

3599

3600

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

3601

lambda *args, **kwargs:

3602

(tcp_server.handle_request

3603

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

3604

2490

3605

logger.debug("Starting main loop")

2491

3606

main_loop.run()

2492

3607

except AvahiError as error:

2493

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

3608

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

2494

3609

cleanup()

2495

3610

sys.exit(1)

2496

3611

except KeyboardInterrupt:

2501

3616

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

2502

3617

cleanup()

2503

3618

3619

2504

3620

if __name__ == '__main__':

2505

3621

main()