/mandos/release : revision 237.7.502

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#!/usr/bin/python

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

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#

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#

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

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#

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#

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

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# service publisher, downloaded from

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

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

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

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

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#

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#

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# Everything else is

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#

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

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

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#

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# This file is part of Mandos.

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#

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

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

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

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# (at your option) any later version.

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#

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

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

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

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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# along with this program. If not, see

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

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#

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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import SocketServer as socketserver

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try:

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from future_builtins import *

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except ImportError:

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pass

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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import avahi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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# Try to find the value of SO_BINDTODEVICE:

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try:

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

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

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.4.1"

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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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version = "1.7.19"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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

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

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet',

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'--no-use-agent'])

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet']

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

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

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self.gnupgargs.append("--no-use-agent")

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def __enter__(self):

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return self

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

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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topdown=False):

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for filename in files:

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

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for dirname in dirs:

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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

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with open(os.devnull) 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)

272

if proc.returncode != 0:

273

raise PGPError(err)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class Avahi(object):

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

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

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

291

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

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

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

302

211

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class AvahiError(Exception):

213

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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)

216

def __unicode__(self):

217

return unicode(repr(self.value))

307

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

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**kwargs)

309

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310

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class AvahiServiceError(AvahiError):

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pass

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314

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class AvahiGroupError(AvahiError):

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pass

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class AvahiService(object):

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"""An Avahi (Zeroconf) service.

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321

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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.

232

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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>

327

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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338

"""

246

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

247

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

248

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

339

340

def __init__(self,

341

interface=avahi.IF_UNSPEC,

342

name=None,

343

servicetype=None,

344

port=None,

345

TXT=None,

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domain="",

347

host="",

348

max_renames=32768,

349

protocol=avahi.PROTO_UNSPEC,

350

bus=None):

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351

self.interface = interface

251

352

self.name = name

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353

self.type = servicetype

261

362

self.server = None

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363

self.bus = bus

263

364

self.entry_group_state_changed_match = None

264

def rename(self):

365

366

def rename(self, remove=True):

265

367

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

266

368

if self.rename_count >= self.max_renames:

267

369

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

268

370

" after %i retries, exiting.",

269

371

self.rename_count)

270

372

raise AvahiServiceError("Too many renames")

271

self.name = unicode(self.server

272

.GetAlternativeServiceName(self.name))

373

self.name = str(

374

self.server.GetAlternativeServiceName(self.name))

375

self.rename_count += 1

273

376

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

274

377

self.name)

275

self.remove()

378

if remove:

379

self.remove()

276

380

try:

277

381

self.add()

278

382

except dbus.exceptions.DBusException as error:

279

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

280

self.cleanup()

281

os._exit(1)

282

self.rename_count += 1

383

if (error.get_dbus_name()

384

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

385

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

386

return self.rename(remove=False)

387

else:

388

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

389

self.cleanup()

390

os._exit(1)

391

283

392

def remove(self):

284

393

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

285

394

if self.entry_group_state_changed_match is not None:

287

396

self.entry_group_state_changed_match = None

288

397

if self.group is not None:

289

398

self.group.Reset()

399

290

400

def add(self):

291

401

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

292

402

self.remove()

309

419

dbus.UInt16(self.port),

310

420

avahi.string_array_to_txt_array(self.TXT))

311

421

self.group.Commit()

422

312

423

def entry_group_state_changed(self, state, error):

313

424

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

314

425

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

315

426

316

427

if state == avahi.ENTRY_GROUP_ESTABLISHED:

317

428

logger.debug("Zeroconf service established.")

318

429

elif state == avahi.ENTRY_GROUP_COLLISION:

320

431

self.rename()

321

432

elif state == avahi.ENTRY_GROUP_FAILURE:

322

433

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

323

unicode(error))

324

raise AvahiGroupError("State changed: %s"

325

% unicode(error))

434

str(error))

435

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

436

326

437

def cleanup(self):

327

438

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

328

439

if self.group is not None:

333

444

pass

334

445

self.group = None

335

446

self.remove()

447

336

448

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

337

449

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

338

450

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" }

451

bad_states = {

452

avahi.SERVER_INVALID: "Zeroconf server invalid",

453

avahi.SERVER_REGISTERING: None,

454

avahi.SERVER_COLLISION: "Zeroconf server name collision",

455

avahi.SERVER_FAILURE: "Zeroconf server failure",

456

}

346

457

if state in bad_states:

347

458

if bad_states[state] is not None:

348

459

if error is None:

351

462

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

352

463

self.cleanup()

353

464

elif state == avahi.SERVER_RUNNING:

354

self.add()

465

try:

466

self.add()

467

except dbus.exceptions.DBusException as error:

468

if (error.get_dbus_name()

469

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

470

logger.info("Local Zeroconf service name"

471

" collision.")

472

return self.rename(remove=False)

473

else:

474

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

475

self.cleanup()

476

os._exit(1)

355

477

else:

356

478

if error is None:

357

479

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

358

480

else:

359

481

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

482

360

483

def activate(self):

361

484

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

362

485

if self.server is None:

366

489

follow_name_owner_changes=True),

367

490

avahi.DBUS_INTERFACE_SERVER)

368

491

self.server.connect_to_signal("StateChanged",

369

self.server_state_changed)

492

self.server_state_changed)

370

493

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

371

494

495

372

496

class AvahiServiceToSyslog(AvahiService):

373

def rename(self):

497

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

374

498

"""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))

499

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

500

syslogger.setFormatter(logging.Formatter(

501

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

502

.format(self.name)))

380

503

return ret

381

504

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

505

506

# Pretend that we have a GnuTLS module

507

class GnuTLS(object):

508

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

509

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

510

511

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

512

if library is None:

513

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

514

_library = ctypes.cdll.LoadLibrary(library)

515

del library

516

_need_version = b"3.3.0"

517

518

def __init__(self):

519

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

520

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

521

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

522

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

523

.format(self._need_version))

524

525

# Unless otherwise indicated, the constants and types below are

526

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

527

528

# Constants

529

E_SUCCESS = 0

530

E_INTERRUPTED = -52

531

E_AGAIN = -28

532

CRT_OPENPGP = 2

533

CLIENT = 2

534

SHUT_RDWR = 0

535

CRD_CERTIFICATE = 1

536

E_NO_CERTIFICATE_FOUND = -49

537

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

538

539

# Types

540

class session_int(ctypes.Structure):

541

_fields_ = []

542

session_t = ctypes.POINTER(session_int)

543

544

class certificate_credentials_st(ctypes.Structure):

545

_fields_ = []

546

certificate_credentials_t = ctypes.POINTER(

547

certificate_credentials_st)

548

certificate_type_t = ctypes.c_int

549

550

class datum_t(ctypes.Structure):

551

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

552

('size', ctypes.c_uint)]

553

554

class openpgp_crt_int(ctypes.Structure):

555

_fields_ = []

556

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

557

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

558

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

559

credentials_type_t = ctypes.c_int

560

transport_ptr_t = ctypes.c_void_p

561

close_request_t = ctypes.c_int

562

563

# Exceptions

564

class Error(Exception):

565

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

566

# exception might be raised from within GnuTLS.__init__,

567

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

568

# global variable has happened.

569

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

570

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

571

# code is passed, convert it to a string with

572

# gnutls.strerror()

573

self.code = code

574

if message is None and code is not None:

575

message = GnuTLS.strerror(code)

576

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

577

message, *args)

578

579

class CertificateSecurityError(Error):

580

pass

581

582

# Classes

583

class Credentials(object):

584

def __init__(self):

585

self._c_object = gnutls.certificate_credentials_t()

586

gnutls.certificate_allocate_credentials(

587

ctypes.byref(self._c_object))

588

self.type = gnutls.CRD_CERTIFICATE

589

590

def __del__(self):

591

gnutls.certificate_free_credentials(self._c_object)

592

593

class ClientSession(object):

594

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

595

self._c_object = gnutls.session_t()

596

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

597

gnutls.set_default_priority(self._c_object)

598

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

599

gnutls.handshake_set_private_extensions(self._c_object,

600

True)

601

self.socket = socket

602

if credentials is None:

603

credentials = gnutls.Credentials()

604

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

605

ctypes.cast(credentials._c_object,

606

ctypes.c_void_p))

607

self.credentials = credentials

608

609

def __del__(self):

610

gnutls.deinit(self._c_object)

611

612

def handshake(self):

613

return gnutls.handshake(self._c_object)

614

615

def send(self, data):

616

data = bytes(data)

617

data_len = len(data)

618

while data_len > 0:

619

data_len -= gnutls.record_send(self._c_object,

620

data[-data_len:],

621

data_len)

622

623

def bye(self):

624

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

625

626

# Error handling functions

627

def _error_code(result):

628

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

629

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

630

if result >= 0:

631

return result

632

if result == gnutls.E_NO_CERTIFICATE_FOUND:

633

raise gnutls.CertificateSecurityError(code=result)

634

raise gnutls.Error(code=result)

635

636

def _retry_on_error(result, func, arguments):

637

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

638

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

639

while result < 0:

640

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

641

return _error_code(result)

642

result = func(*arguments)

643

return result

644

645

# Unless otherwise indicated, the function declarations below are

646

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

647

648

# Functions

649

priority_set_direct = _library.gnutls_priority_set_direct

650

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

651

ctypes.POINTER(ctypes.c_char_p)]

652

priority_set_direct.restype = _error_code

653

654

init = _library.gnutls_init

655

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

656

init.restype = _error_code

657

658

set_default_priority = _library.gnutls_set_default_priority

659

set_default_priority.argtypes = [session_t]

660

set_default_priority.restype = _error_code

661

662

record_send = _library.gnutls_record_send

663

record_send.argtypes = [session_t, ctypes.c_void_p,

664

ctypes.c_size_t]

665

record_send.restype = ctypes.c_ssize_t

666

record_send.errcheck = _retry_on_error

667

668

certificate_allocate_credentials = (

669

_library.gnutls_certificate_allocate_credentials)

670

certificate_allocate_credentials.argtypes = [

671

ctypes.POINTER(certificate_credentials_t)]

672

certificate_allocate_credentials.restype = _error_code

673

674

certificate_free_credentials = (

675

_library.gnutls_certificate_free_credentials)

676

certificate_free_credentials.argtypes = [

677

certificate_credentials_t]

678

certificate_free_credentials.restype = None

679

680

handshake_set_private_extensions = (

681

_library.gnutls_handshake_set_private_extensions)

682

handshake_set_private_extensions.argtypes = [session_t,

683

ctypes.c_int]

684

handshake_set_private_extensions.restype = None

685

686

credentials_set = _library.gnutls_credentials_set

687

credentials_set.argtypes = [session_t, credentials_type_t,

688

ctypes.c_void_p]

689

credentials_set.restype = _error_code

690

691

strerror = _library.gnutls_strerror

692

strerror.argtypes = [ctypes.c_int]

693

strerror.restype = ctypes.c_char_p

694

695

certificate_type_get = _library.gnutls_certificate_type_get

696

certificate_type_get.argtypes = [session_t]

697

certificate_type_get.restype = _error_code

698

699

certificate_get_peers = _library.gnutls_certificate_get_peers

700

certificate_get_peers.argtypes = [session_t,

701

ctypes.POINTER(ctypes.c_uint)]

702

certificate_get_peers.restype = ctypes.POINTER(datum_t)

703

704

global_set_log_level = _library.gnutls_global_set_log_level

705

global_set_log_level.argtypes = [ctypes.c_int]

706

global_set_log_level.restype = None

707

708

global_set_log_function = _library.gnutls_global_set_log_function

709

global_set_log_function.argtypes = [log_func]

710

global_set_log_function.restype = None

711

712

deinit = _library.gnutls_deinit

713

deinit.argtypes = [session_t]

714

deinit.restype = None

715

716

handshake = _library.gnutls_handshake

717

handshake.argtypes = [session_t]

718

handshake.restype = _error_code

719

handshake.errcheck = _retry_on_error

720

721

transport_set_ptr = _library.gnutls_transport_set_ptr

722

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

723

transport_set_ptr.restype = None

724

725

bye = _library.gnutls_bye

726

bye.argtypes = [session_t, close_request_t]

727

bye.restype = _error_code

728

bye.errcheck = _retry_on_error

729

730

check_version = _library.gnutls_check_version

731

check_version.argtypes = [ctypes.c_char_p]

732

check_version.restype = ctypes.c_char_p

733

734

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

735

736

openpgp_crt_init = _library.gnutls_openpgp_crt_init

737

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

738

openpgp_crt_init.restype = _error_code

739

740

openpgp_crt_import = _library.gnutls_openpgp_crt_import

741

openpgp_crt_import.argtypes = [openpgp_crt_t,

742

ctypes.POINTER(datum_t),

743

openpgp_crt_fmt_t]

744

openpgp_crt_import.restype = _error_code

745

746

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

747

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

748

ctypes.POINTER(ctypes.c_uint)]

749

openpgp_crt_verify_self.restype = _error_code

750

751

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

752

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

753

openpgp_crt_deinit.restype = None

754

755

openpgp_crt_get_fingerprint = (

756

_library.gnutls_openpgp_crt_get_fingerprint)

757

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

758

ctypes.c_void_p,

759

ctypes.POINTER(

760

ctypes.c_size_t)]

761

openpgp_crt_get_fingerprint.restype = _error_code

762

763

# Remove non-public functions

764

del _error_code, _retry_on_error

765

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

766

gnutls = GnuTLS()

767

768

769

def call_pipe(connection, # : multiprocessing.Connection

770

func, *args, **kwargs):

771

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

772

773

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

774

return value on the provided multiprocessing.Connection.

775

"""

776

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

777

connection.close()

778

779

388

780

class Client(object):

389

781

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

390

782

391

783

Attributes:

392

784

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

393

785

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

395

787

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

396

788

to see if the client lives.

397

789

'None' if no process is running.

398

checker_callback_tag: a gobject event source tag, or None

790

checker_callback_tag: a GLib event source tag, or None

399

791

checker_command: string; External command which is run to check

400

792

if client lives. %() expansions are done at

401

793

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

402

794

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

403

checker_initiator_tag: a gobject event source tag, or None

795

checker_initiator_tag: a GLib event source tag, or None

404

796

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

405

797

client_structure: Object describing what attributes a client has

406

798

and is used for storing the client at exit

407

799

current_checker_command: string; current running checker_command

408

disable_initiator_tag: a gobject event source tag, or None

800

disable_initiator_tag: a GLib event source tag, or None

409

801

enabled: bool()

410

802

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

411

803

uniquely identify the client

415

807

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

416

808

last_checker_status: integer between 0 and 255 reflecting exit

417

809

status of last checker. -1 reflects crashed

418

checker, or None.

810

checker, -2 means no checker completed yet.

811

last_checker_signal: The signal which killed the last checker, if

812

last_checker_status is -1

419

813

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

420

814

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

421

815

D-Bus identifiers

422

816

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

423

817

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

424

818

until this client is disabled

425

extended_timeout: extra long timeout when password has been sent

819

extended_timeout: extra long timeout when secret has been sent

426

820

runtime_expansions: Allowed attributes for runtime expansion.

427

821

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

428

822

disabled, or None

823

server_settings: The server_settings dict from main()

429

824

"""

430

825

431

826

runtime_expansions = ("approval_delay", "approval_duration",

432

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

433

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

827

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

828

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

829

"last_approval_request", "last_checked_ok",

434

830

"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)

831

client_defaults = {

832

"timeout": "PT5M",

833

"extended_timeout": "PT15M",

834

"interval": "PT2M",

835

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

836

"host": "",

837

"approval_delay": "PT0S",

838

"approval_duration": "PT1S",

839

"approved_by_default": "True",

840

"enabled": "True",

841

}

460

842

461

843

@staticmethod

462

844

def config_parser(config):

470

852

for client_name in config.sections():

471

853

section = dict(config.items(client_name))

472

854

client = settings[client_name] = {}

473

855

474

856

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

475

857

# Reformat values from string types to Python types

476

858

client["approved_by_default"] = config.getboolean(

477

859

client_name, "approved_by_default")

478

860

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

479

861

"enabled")

480

862

863

# Uppercase and remove spaces from fingerprint for later

864

# comparison purposes with return value from the

865

# fingerprint() function

481

866

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

482

867

.replace(" ", ""))

483

868

if "secret" in section:

484

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

869

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

870

.encode("utf-8"),

871

"base64")

485

872

elif "secfile" in section:

486

873

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

487

874

(section["secfile"])),

488

875

"rb") as secfile:

489

876

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

490

877

else:

491

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

492

% section)

878

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

879

.format(section))

493

880

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

494

881

client["extended_timeout"] = string_to_delta(

495

882

section["extended_timeout"])

501

888

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

502

889

client["last_approval_request"] = None

503

890

client["last_checked_ok"] = None

504

client["last_checker_status"] = None

505

891

client["last_checker_status"] = -2

892

506

893

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."""

894

895

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

513

896

self.name = name

897

if server_settings is None:

898

server_settings = {}

899

self.server_settings = server_settings

514

900

# adding all client settings

515

for setting, value in settings.iteritems():

901

for setting, value in settings.items():

516

902

setattr(self, setting, value)

517

903

518

904

if self.enabled:

519

905

if not hasattr(self, "last_enabled"):

520

906

self.last_enabled = datetime.datetime.utcnow()

524

910

else:

525

911

self.last_enabled = None

526

912

self.expires = None

527

913

528

914

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

532

915

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

533

916

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

534

917

datetime.datetime.utcnow())

541

924

self.current_checker_command = None

542

925

self.approved = None

543

926

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()

927

self.changedstate = multiprocessing_manager.Condition(

928

multiprocessing_manager.Lock())

929

self.client_structure = [attr

930

for attr in self.__dict__.keys()

549

931

if not attr.startswith("_")]

550

932

self.client_structure.append("client_structure")

551

552

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

553

lambda obj:

554

isinstance(obj,

555

property)):

933

934

for name, t in inspect.getmembers(

935

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

556

936

if not name.startswith("_"):

557

937

self.client_structure.append(name)

558

938

559

939

# Send notice to process children that client state has changed

560

940

def send_changedstate(self):

561

941

with self.changedstate:

562

942

self.changedstate.notify_all()

563

943

564

944

def enable(self):

565

945

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

566

946

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

567

947

# Already enabled

568

948

return

569

self.send_changedstate()

570

949

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

571

950

self.enabled = True

572

951

self.last_enabled = datetime.datetime.utcnow()

573

952

self.init_checker()

574

953

self.send_changedstate()

954

575

955

def disable(self, quiet=True):

576

956

"""Disable this client."""

577

957

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

578

958

return False

579

959

if not quiet:

580

self.send_changedstate()

581

if not quiet:

582

960

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

583

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

584

gobject.source_remove(self.disable_initiator_tag)

961

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

962

GLib.source_remove(self.disable_initiator_tag)

585

963

self.disable_initiator_tag = None

586

964

self.expires = None

587

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

588

gobject.source_remove(self.checker_initiator_tag)

965

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

966

GLib.source_remove(self.checker_initiator_tag)

589

967

self.checker_initiator_tag = None

590

968

self.stop_checker()

591

969

self.enabled = False

592

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

970

if not quiet:

971

self.send_changedstate()

972

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

593

973

return False

594

974

595

975

def __del__(self):

596

976

self.disable()

597

977

598

978

def init_checker(self):

599

979

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

600

980

# and every interval from then on.

601

self.checker_initiator_tag = (gobject.timeout_add

602

(self.interval_milliseconds(),

603

self.start_checker))

981

if self.checker_initiator_tag is not None:

982

GLib.source_remove(self.checker_initiator_tag)

983

self.checker_initiator_tag = GLib.timeout_add(

984

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

985

self.start_checker)

604

986

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

605

self.disable_initiator_tag = (gobject.timeout_add

606

(self.timeout_milliseconds(),

607

self.disable))

987

if self.disable_initiator_tag is not None:

988

GLib.source_remove(self.disable_initiator_tag)

989

self.disable_initiator_tag = GLib.timeout_add(

990

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

608

991

# Also start a new checker *right now*.

609

992

self.start_checker()

610

611

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

993

994

def checker_callback(self, source, condition, connection,

995

command):

612

996

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

613

997

self.checker_callback_tag = None

614

998

self.checker = None

615

if os.WIFEXITED(condition):

616

self.last_checker_status = os.WEXITSTATUS(condition)

999

# Read return code from connection (see call_pipe)

1000

returncode = connection.recv()

1001

connection.close()

1002

1003

if returncode >= 0:

1004

self.last_checker_status = returncode

1005

self.last_checker_signal = None

617

1006

if self.last_checker_status == 0:

618

1007

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

619

1008

vars(self))

620

1009

self.checked_ok()

621

1010

else:

622

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

623

vars(self))

1011

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

624

1012

else:

625

1013

self.last_checker_status = -1

1014

self.last_checker_signal = -returncode

626

1015

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

627

1016

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

"""

1017

return False

1018

1019

def checked_ok(self):

1020

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

1021

self.last_checked_ok = datetime.datetime.utcnow()

1022

self.last_checker_status = 0

1023

self.last_checker_signal = None

1024

self.bump_timeout()

1025

1026

def bump_timeout(self, timeout=None):

1027

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

635

1028

if timeout is None:

636

1029

timeout = self.timeout

637

self.last_checked_ok = datetime.datetime.utcnow()

638

1030

if self.disable_initiator_tag is not None:

639

gobject.source_remove(self.disable_initiator_tag)

1031

GLib.source_remove(self.disable_initiator_tag)

1032

self.disable_initiator_tag = None

640

1033

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

641

self.disable_initiator_tag = (gobject.timeout_add

642

(timedelta_to_milliseconds

643

(timeout), self.disable))

1034

self.disable_initiator_tag = GLib.timeout_add(

1035

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

644

1036

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

645

1037

646

1038

def need_approval(self):

647

1039

self.last_approval_request = datetime.datetime.utcnow()

648

1040

649

1041

def start_checker(self):

650

1042

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

651

1043

652

1044

If a checker already exists, leave it running and do

653

1045

nothing."""

654

1046

# 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

1047

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

1048

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

1049

# would inevitably timeout, since no checker would get a

1050

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

659

1051

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

660

1052

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

661

1053

# 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)

1054

1055

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

1056

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

1057

self.checker.join()

1058

self.checker = None

676

1059

# Start a new checker if needed

677

1060

if self.checker is None:

1061

# Escape attributes for the shell

1062

escaped_attrs = {

1063

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

1064

for attr in self.runtime_expansions}

678

1065

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

1066

command = self.checker_command % escaped_attrs

1067

except TypeError as error:

1068

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

1069

self.checker_command,

1070

exc_info=error)

1071

return True # Try again later

697

1072

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

1073

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

1074

self.name)

1075

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

1076

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

1077

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

1078

# always replaced by /dev/null.)

1079

# The exception is when not debugging but nevertheless

1080

# running in the foreground; use the previously

1081

# created wnull.

1082

popen_args = {"close_fds": True,

1083

"shell": True,

1084

"cwd": "/"}

1085

if (not self.server_settings["debug"]

1086

and self.server_settings["foreground"]):

1087

popen_args.update({"stdout": wnull,

1088

"stderr": wnull})

1089

pipe = multiprocessing.Pipe(duplex=False)

1090

self.checker = multiprocessing.Process(

1091

target=call_pipe,

1092

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

1093

kwargs=popen_args)

1094

self.checker.start()

1095

self.checker_callback_tag = GLib.io_add_watch(

1096

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

1097

self.checker_callback, pipe[0], command)

1098

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

722

1099

return True

723

1100

724

1101

def stop_checker(self):

725

1102

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

726

1103

if self.checker_callback_tag:

727

gobject.source_remove(self.checker_callback_tag)

1104

GLib.source_remove(self.checker_callback_tag)

728

1105

self.checker_callback_tag = None

729

1106

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

730

1107

return

731

1108

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

1109

self.checker.terminate()

740

1110

self.checker = None

741

1111

742

1112

743

def dbus_service_property(dbus_interface, signature="v",

744

access="readwrite", byte_arrays=False):

1113

def dbus_service_property(dbus_interface,

1114

signature="v",

1115

access="readwrite",

1116

byte_arrays=False):

745

1117

"""Decorators for marking methods of a DBusObjectWithProperties to

746

1118

become properties on the D-Bus.

747

1119

748

1120

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

749

1121

and with one argument by "Set".

750

1122

751

1123

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

752

1124

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

753

1125

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

756

1128

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

757

1129

if byte_arrays and signature != "ay":

758

1130

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

759

" signature %r" % signature)

1131

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

1132

760

1133

def decorator(func):

761

1134

func._dbus_is_property = True

762

1135

func._dbus_interface = dbus_interface

765

1138

func._dbus_name = func.__name__

766

1139

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

767

1140

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

768

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

769

return func

1141

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1142

return func

1143

1144

return decorator

1145

1146

1147

def dbus_interface_annotations(dbus_interface):

1148

"""Decorator for marking functions returning interface annotations

1149

1150

Usage:

1151

1152

@dbus_interface_annotations("org.example.Interface")

1153

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

1154

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

1155

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

1156

"false"}

1157

"""

1158

1159

def decorator(func):

1160

func._dbus_is_interface = True

1161

func._dbus_interface = dbus_interface

1162

func._dbus_name = dbus_interface

1163

return func

1164

1165

return decorator

1166

1167

1168

def dbus_annotations(annotations):

1169

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

1170

Usage:

1171

1172

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

1173

"org.freedesktop.DBus.Property."

1174

"EmitsChangedSignal": "false"})

1175

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

1176

access="r")

1177

def Property_dbus_property(self):

1178

return dbus.Boolean(False)

1179

1180

See also the DBusObjectWithAnnotations class.

1181

"""

1182

1183

def decorator(func):

1184

func._dbus_annotations = annotations

1185

return func

1186

770

1187

return decorator

771

1188

772

1189

773

1190

class DBusPropertyException(dbus.exceptions.DBusException):

774

1191

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

775

1192

"""

776

def __unicode__(self):

777

return unicode(str(self))

1193

pass

778

1194

779

1195

780

1196

class DBusPropertyAccessException(DBusPropertyException):

789

1205

pass

790

1206

791

1207

792

class DBusObjectWithProperties(dbus.service.Object):

1208

class DBusObjectWithAnnotations(dbus.service.Object):

1209

"""A D-Bus object with annotations.

1210

1211

Classes inheriting from this can use the dbus_annotations

1212

decorator to add annotations to methods or signals.

1213

"""

1214

1215

@staticmethod

1216

def _is_dbus_thing(thing):

1217

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

1218

1219

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

1220

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

1221

"""

1222

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

1223

False)

1224

1225

def _get_all_dbus_things(self, thing):

1226

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

1227

"""

1228

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

1229

athing.__get__(self))

1230

for cls in self.__class__.__mro__

1231

for name, athing in

1232

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

1233

1234

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1235

out_signature="s",

1236

path_keyword='object_path',

1237

connection_keyword='connection')

1238

def Introspect(self, object_path, connection):

1239

"""Overloading of standard D-Bus method.

1240

1241

Inserts annotation tags on methods and signals.

1242

"""

1243

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

1244

connection)

1245

try:

1246

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

1247

1248

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

1249

# Add annotation tags

1250

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

1251

for tag in if_tag.getElementsByTagName(typ):

1252

annots = dict()

1253

for name, prop in (self.

1254

_get_all_dbus_things(typ)):

1255

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

1256

and prop._dbus_interface

1257

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

1258

annots.update(getattr(

1259

prop, "_dbus_annotations", {}))

1260

for name, value in annots.items():

1261

ann_tag = document.createElement(

1262

"annotation")

1263

ann_tag.setAttribute("name", name)

1264

ann_tag.setAttribute("value", value)

1265

tag.appendChild(ann_tag)

1266

# Add interface annotation tags

1267

for annotation, value in dict(

1268

itertools.chain.from_iterable(

1269

annotations().items()

1270

for name, annotations

1271

in self._get_all_dbus_things("interface")

1272

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

1273

)).items():

1274

ann_tag = document.createElement("annotation")

1275

ann_tag.setAttribute("name", annotation)

1276

ann_tag.setAttribute("value", value)

1277

if_tag.appendChild(ann_tag)

1278

# Fix argument name for the Introspect method itself

1279

if (if_tag.getAttribute("name")

1280

== dbus.INTROSPECTABLE_IFACE):

1281

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

1282

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

1283

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

1284

if (arg.getAttribute("direction")

1285

== "out"):

1286

arg.setAttribute("name",

1287

"xml_data")

1288

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

1289

document.unlink()

1290

except (AttributeError, xml.dom.DOMException,

1291

xml.parsers.expat.ExpatError) as error:

1292

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

1293

exc_info=error)

1294

return xmlstring

1295

1296

1297

class DBusObjectWithProperties(DBusObjectWithAnnotations):

793

1298

"""A D-Bus object with properties.

794

1299

795

1300

Classes inheriting from this can use the dbus_service_property

796

1301

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

797

1302

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

798

1303

"""

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

1304

812

1305

def _get_dbus_property(self, interface_name, property_name):

813

1306

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

814

1307

property with the specified name and interface.

815

1308

"""

816

for cls in self.__class__.__mro__:

817

for name, value in (inspect.getmembers

818

(cls, self._is_dbus_property)):

1309

for cls in self.__class__.__mro__:

1310

for name, value in inspect.getmembers(

1311

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

819

1312

if (value._dbus_name == property_name

820

1313

and value._dbus_interface == interface_name):

821

1314

return value.__get__(self)

822

1315

823

1316

# 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",

1317

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

1318

self.dbus_object_path, interface_name, property_name))

1319

1320

@classmethod

1321

def _get_all_interface_names(cls):

1322

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

1323

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

1324

"_dbus_interface", None)

1325

for x in (inspect.getmro(cls))

1326

for attr in dir(x))

1327

if name is not None)

1328

1329

@dbus.service.method(dbus.PROPERTIES_IFACE,

1330

in_signature="ss",

829

1331

out_signature="v")

830

1332

def Get(self, interface_name, property_name):

831

1333

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

837

1339

if not hasattr(value, "variant_level"):

838

1340

return value

839

1341

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

840

1342

841

1343

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

842

1344

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

843

1345

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

849

1351

# The byte_arrays option is not supported yet on

850

1352

# signatures other than "ay".

851

1353

if prop._dbus_signature != "ay":

852

raise ValueError

853

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

854

for byte in value))

1354

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

1355

"'ay' signature {!r}"

1356

.format(prop._dbus_signature))

1357

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

1358

for byte in value))

855

1359

prop(value)

856

857

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

1360

1361

@dbus.service.method(dbus.PROPERTIES_IFACE,

1362

in_signature="s",

858

1363

out_signature="a{sv}")

859

1364

def GetAll(self, interface_name):

860

1365

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

861

1366

standard.

862

1367

863

1368

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

864

1369

"""

865

1370

properties = {}

866

for name, prop in self._get_all_dbus_properties():

1371

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

867

1372

if (interface_name

868

1373

and interface_name != prop._dbus_interface):

869

1374

# Interface non-empty but did not match

875

1380

if not hasattr(value, "variant_level"):

876

1381

properties[name] = value

877

1382

continue

878

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

879

value.variant_level+1)

1383

properties[name] = type(value)(

1384

value, variant_level=value.variant_level + 1)

880

1385

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

881

1386

1387

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

1388

def PropertiesChanged(self, interface_name, changed_properties,

1389

invalidated_properties):

1390

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

1391

standard.

1392

"""

1393

pass

1394

882

1395

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

883

1396

out_signature="s",

884

1397

path_keyword='object_path',

885

1398

connection_keyword='connection')

886

1399

def Introspect(self, object_path, connection):

887

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

1400

"""Overloading of standard D-Bus method.

1401

1402

Inserts property tags and interface annotation tags.

888

1403

"""

889

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

890

connection)

1404

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1405

object_path,

1406

connection)

891

1407

try:

892

1408

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

1409

893

1410

def make_tag(document, name, prop):

894

1411

e = document.createElement("property")

895

1412

e.setAttribute("name", name)

896

1413

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

897

1414

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

898

1415

return e

1416

899

1417

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

1418

# Add property tags

900

1419

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

901

1420

for name, prop

902

in self._get_all_dbus_properties()

1421

in self._get_all_dbus_things("property")

903

1422

if prop._dbus_interface

904

1423

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

905

1424

if_tag.appendChild(tag)

1425

# Add annotation tags for properties

1426

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

1427

annots = dict()

1428

for name, prop in self._get_all_dbus_things(

1429

"property"):

1430

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

1431

and prop._dbus_interface

1432

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

1433

annots.update(getattr(

1434

prop, "_dbus_annotations", {}))

1435

for name, value in annots.items():

1436

ann_tag = document.createElement(

1437

"annotation")

1438

ann_tag.setAttribute("name", name)

1439

ann_tag.setAttribute("value", value)

1440

tag.appendChild(ann_tag)

906

1441

# Add the names to the return values for the

907

1442

# "org.freedesktop.DBus.Properties" methods

908

1443

if (if_tag.getAttribute("name")

923

1458

except (AttributeError, xml.dom.DOMException,

924

1459

xml.parsers.expat.ExpatError) as error:

925

1460

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

926

error)

927

return xmlstring

928

929

930

def datetime_to_dbus (dt, variant_level=0):

1461

exc_info=error)

1462

return xmlstring

1463

1464

1465

try:

1466

dbus.OBJECT_MANAGER_IFACE

1467

except AttributeError:

1468

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

1469

1470

1471

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1472

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

1473

1474

Classes inheriting from this exposes the standard

1475

GetManagedObjects call and the InterfacesAdded and

1476

InterfacesRemoved signals on the standard

1477

"org.freedesktop.DBus.ObjectManager" interface.

1478

1479

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

1480

manually.

1481

"""

1482

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1483

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

1484

def GetManagedObjects(self):

1485

"""This function must be overridden"""

1486

raise NotImplementedError()

1487

1488

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1489

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

1490

def InterfacesAdded(self, object_path, interfaces_and_properties):

1491

pass

1492

1493

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

1494

def InterfacesRemoved(self, object_path, interfaces):

1495

pass

1496

1497

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1498

out_signature="s",

1499

path_keyword='object_path',

1500

connection_keyword='connection')

1501

def Introspect(self, object_path, connection):

1502

"""Overloading of standard D-Bus method.

1503

1504

Override return argument name of GetManagedObjects to be

1505

"objpath_interfaces_and_properties"

1506

"""

1507

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1508

object_path,

1509

connection)

1510

try:

1511

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

1512

1513

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

1514

# Fix argument name for the GetManagedObjects method

1515

if (if_tag.getAttribute("name")

1516

== dbus.OBJECT_MANAGER_IFACE):

1517

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

1518

if (cn.getAttribute("name")

1519

== "GetManagedObjects"):

1520

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

1521

if (arg.getAttribute("direction")

1522

== "out"):

1523

arg.setAttribute(

1524

"name",

1525

"objpath_interfaces"

1526

"_and_properties")

1527

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

1528

document.unlink()

1529

except (AttributeError, xml.dom.DOMException,

1530

xml.parsers.expat.ExpatError) as error:

1531

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

1532

exc_info=error)

1533

return xmlstring

1534

1535

1536

def datetime_to_dbus(dt, variant_level=0):

931

1537

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

932

1538

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.

1539

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

1540

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

1541

1542

1543

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1544

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

1545

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

1546

interface names according to the "alt_interface_names" mapping.

1547

Usage:

1548

1549

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

1550

"net.example.AlternateInterface"})

1551

class SampleDBusObject(dbus.service.Object):

1552

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

1553

def SampleDBusMethod():

1554

pass

1555

1556

The above "SampleDBusMethod" on "SampleDBusObject" will be

1557

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

1558

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

1559

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

1560

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

1561

1562

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

1563

(from DBusObjectWithProperties) and interfaces (from the

1564

dbus_interface_annotations decorator).

942

1565

"""

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):

1566

1567

def wrapper(cls):

1568

for orig_interface_name, alt_interface_name in (

1569

alt_interface_names.items()):

1570

attr = {}

1571

interface_names = set()

1572

# Go though all attributes of the class

1573

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

950

1574

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

951

1575

# with the wrong interface name

952

1576

if (not hasattr(attribute, "_dbus_interface")

953

or not attribute._dbus_interface

954

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

1577

or not attribute._dbus_interface.startswith(

1578

orig_interface_name)):

955

1579

continue

956

1580

# Create an alternate D-Bus interface name based on

957

1581

# the current name

958

alt_interface = (attribute._dbus_interface

959

.replace("se.recompile.Mandos",

960

"se.bsnet.fukt.Mandos"))

1582

alt_interface = attribute._dbus_interface.replace(

1583

orig_interface_name, alt_interface_name)

1584

interface_names.add(alt_interface)

961

1585

# Is this a D-Bus signal?

962

1586

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

963

# Extract the original non-method function by

964

# black magic

965

nonmethod_func = (dict(

1587

# Extract the original non-method undecorated

1588

# function by black magic

1589

if sys.version_info.major == 2:

1590

nonmethod_func = (dict(

966

1591

zip(attribute.func_code.co_freevars,

967

attribute.__closure__))["func"]

968

.cell_contents)

1592

attribute.__closure__))

1593

["func"].cell_contents)

1594

else:

1595

nonmethod_func = (dict(

1596

zip(attribute.__code__.co_freevars,

1597

attribute.__closure__))

1598

["func"].cell_contents)

969

1599

# Create a new, but exactly alike, function

970

1600

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

971

1601

# 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)))

1602

new_function = copy_function(nonmethod_func)

1603

new_function = (dbus.service.signal(

1604

alt_interface,

1605

attribute._dbus_signature)(new_function))

1606

# Copy annotations, if any

1607

try:

1608

new_function._dbus_annotations = dict(

1609

attribute._dbus_annotations)

1610

except AttributeError:

1611

pass

1612

981

1613

# 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

1614

# original and alternate functions, so both the

1615

# original and alternate signals gets sent when

1616

# the function is called

984

1617

def fixscope(func1, func2):

985

1618

"""This function is a scope container to pass

986

1619

func1 and func2 to the "call_both" function

987

1620

outside of its arguments"""

1621

1622

@functools.wraps(func2)

988

1623

def call_both(*args, **kwargs):

989

1624

"""This function will emit two D-Bus

990

1625

signals by calling func1 and func2"""

991

1626

func1(*args, **kwargs)

992

1627

func2(*args, **kwargs)

1628

# Make wrapper function look like a D-Bus

1629

# signal

1630

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

1631

if name.startswith("_dbus_"):

1632

setattr(call_both, name, attr)

1633

993

1634

return call_both

994

1635

# Create the "call_both" function and add it to

995

1636

# the class

996

attr[attrname] = fixscope(attribute,

997

new_function)

1637

attr[attrname] = fixscope(attribute, new_function)

998

1638

# Is this a D-Bus method?

999

1639

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

1000

1640

# Create a new, but exactly alike, function

1001

1641

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

1002

1642

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

1003

1643

# 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)))

1644

attr[attrname] = (

1645

dbus.service.method(

1646

alt_interface,

1647

attribute._dbus_in_signature,

1648

attribute._dbus_out_signature)

1649

(copy_function(attribute)))

1650

# Copy annotations, if any

1651

try:

1652

attr[attrname]._dbus_annotations = dict(

1653

attribute._dbus_annotations)

1654

except AttributeError:

1655

pass

1014

1656

# Is this a D-Bus property?

1015

1657

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

1016

1658

# Create a new, but exactly alike, function

1017

1659

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

1018

1660

# property with the alternate D-Bus interface

1019

1661

# 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

1662

attr[attrname] = (dbus_service_property(

1663

alt_interface, attribute._dbus_signature,

1664

attribute._dbus_access,

1665

attribute._dbus_get_args_options

1666

["byte_arrays"])

1667

(copy_function(attribute)))

1668

# Copy annotations, if any

1669

try:

1670

attr[attrname]._dbus_annotations = dict(

1671

attribute._dbus_annotations)

1672

except AttributeError:

1673

pass

1674

# Is this a D-Bus interface?

1675

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

1676

# Create a new, but exactly alike, function

1677

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

1678

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

1679

# to the class.

1680

attr[attrname] = (

1681

dbus_interface_annotations(alt_interface)

1682

(copy_function(attribute)))

1683

if deprecate:

1684

# Deprecate all alternate interfaces

1685

iname = "_AlternateDBusNames_interface_annotation{}"

1686

for interface_name in interface_names:

1687

1688

@dbus_interface_annotations(interface_name)

1689

def func(self):

1690

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

1691

"true"}

1692

# Find an unused name

1693

for aname in (iname.format(i)

1694

for i in itertools.count()):

1695

if aname not in attr:

1696

attr[aname] = func

1697

break

1698

if interface_names:

1699

# Replace the class with a new subclass of it with

1700

# methods, signals, etc. as created above.

1701

if sys.version_info.major == 2:

1702

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

1703

(cls, ), attr)

1704

else:

1705

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

1706

(cls, ), attr)

1707

return cls

1708

1709

return wrapper

1710

1711

1712

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

1713

"se.bsnet.fukt.Mandos"})

1036

1714

class ClientDBus(Client, DBusObjectWithProperties):

1037

1715

"""A Client class using D-Bus

1038

1716

1039

1717

Attributes:

1040

1718

dbus_object_path: dbus.ObjectPath

1041

1719

bus: dbus.SystemBus()

1042

1720

"""

1043

1721

1044

1722

runtime_expansions = (Client.runtime_expansions

1045

+ ("dbus_object_path",))

1046

1723

+ ("dbus_object_path", ))

1724

1725

_interface = "se.recompile.Mandos.Client"

1726

1047

1727

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

1048

1049

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

1728

1729

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

1050

1730

self.bus = bus

1051

1731

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

1052

self._approvals_pending = 0

1053

1054

self._approvals_pending = 0

1055

1732

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

1056

1733

# the D-Bus

1057

client_object_name = unicode(self.name).translate(

1734

client_object_name = str(self.name).translate(

1058

1735

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

1059

1736

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

1060

self.dbus_object_path = (dbus.ObjectPath

1061

("/clients/" + client_object_name))

1737

self.dbus_object_path = dbus.ObjectPath(

1738

"/clients/" + client_object_name)

1062

1739

DBusObjectWithProperties.__init__(self, self.bus,

1063

1740

self.dbus_object_path)

1064

1065

def notifychangeproperty(transform_func,

1066

dbus_name, type_func=lambda x: x,

1067

variant_level=1):

1741

1742

def notifychangeproperty(transform_func, dbus_name,

1743

type_func=lambda x: x,

1744

variant_level=1,

1745

invalidate_only=False,

1746

_interface=_interface):

1068

1747

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

1069

1748

its changes to DBus.

1070

1749

1071

1750

transform_fun: Function that takes a value and a variant_level

1072

1751

and transforms it to a D-Bus type.

1073

1752

dbus_name: D-Bus name of the variable

1075

1754

to the D-Bus. Default: no transform

1076

1755

variant_level: D-Bus variant level. Default: 1

1077

1756

"""

1078

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

1757

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

1758

1079

1759

def setter(self, value):

1080

1760

if hasattr(self, "dbus_object_path"):

1081

1761

if (not hasattr(self, attrname) or

1082

1762

type_func(getattr(self, attrname, None))

1083

1763

!= type_func(value)):

1084

dbus_value = transform_func(type_func(value),

1085

variant_level

1086

=variant_level)

1087

self.PropertyChanged(dbus.String(dbus_name),

1088

dbus_value)

1764

if invalidate_only:

1765

self.PropertiesChanged(

1766

_interface, dbus.Dictionary(),

1767

dbus.Array((dbus_name, )))

1768

else:

1769

dbus_value = transform_func(

1770

type_func(value),

1771

variant_level=variant_level)

1772

self.PropertyChanged(dbus.String(dbus_name),

1773

dbus_value)

1774

self.PropertiesChanged(

1775

_interface,

1776

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

1777

dbus_value}),

1778

dbus.Array())

1089

1779

setattr(self, attrname, value)

1090

1780

1091

1781

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

1092

1093

1782

1094

1783

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1095

1784

approvals_pending = notifychangeproperty(dbus.Boolean,

1096

1785

"ApprovalPending",

1097

type_func = bool)

1786

type_func=bool)

1098

1787

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

1099

1788

last_enabled = notifychangeproperty(datetime_to_dbus,

1100

1789

"LastEnabled")

1101

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

1102

type_func = lambda checker:

1103

checker is not None)

1790

checker = notifychangeproperty(

1791

dbus.Boolean, "CheckerRunning",

1792

type_func=lambda checker: checker is not None)

1104

1793

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1105

1794

"LastCheckedOK")

1795

last_checker_status = notifychangeproperty(dbus.Int16,

1796

"LastCheckerStatus")

1106

1797

last_approval_request = notifychangeproperty(

1107

1798

datetime_to_dbus, "LastApprovalRequest")

1108

1799

approved_by_default = notifychangeproperty(dbus.Boolean,

1109

1800

"ApprovedByDefault")

1110

approval_delay = notifychangeproperty(dbus.UInt64,

1111

"ApprovalDelay",

1112

type_func =

1113

timedelta_to_milliseconds)

1801

approval_delay = notifychangeproperty(

1802

dbus.UInt64, "ApprovalDelay",

1803

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

1114

1804

approval_duration = notifychangeproperty(

1115

1805

dbus.UInt64, "ApprovalDuration",

1116

type_func = timedelta_to_milliseconds)

1806

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

1117

1807

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

1118

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

1119

type_func =

1120

timedelta_to_milliseconds)

1808

timeout = notifychangeproperty(

1809

dbus.UInt64, "Timeout",

1810

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

1121

1811

extended_timeout = notifychangeproperty(

1122

1812

dbus.UInt64, "ExtendedTimeout",

1123

type_func = timedelta_to_milliseconds)

1124

interval = notifychangeproperty(dbus.UInt64,

1125

"Interval",

1126

type_func =

1127

timedelta_to_milliseconds)

1813

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

1814

interval = notifychangeproperty(

1815

dbus.UInt64, "Interval",

1816

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

1128

1817

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

1129

1818

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

1819

invalidate_only=True)

1820

1130

1821

del notifychangeproperty

1131

1822

1132

1823

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

1133

1824

try:

1134

1825

self.remove_from_connection()

1137

1828

if hasattr(DBusObjectWithProperties, "__del__"):

1138

1829

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

1139

1830

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

1140

1141

def checker_callback(self, pid, condition, command,

1142

*args, **kwargs):

1143

self.checker_callback_tag = None

1144

self.checker = None

1145

if os.WIFEXITED(condition):

1146

exitstatus = os.WEXITSTATUS(condition)

1831

1832

def checker_callback(self, source, condition,

1833

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

1834

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

1835

connection, command, *args,

1836

**kwargs)

1837

exitstatus = self.last_checker_status

1838

if exitstatus >= 0:

1147

1839

# Emit D-Bus signal

1148

1840

self.CheckerCompleted(dbus.Int16(exitstatus),

1149

dbus.Int64(condition),

1841

# This is specific to GNU libC

1842

dbus.Int64(exitstatus << 8),

1150

1843

dbus.String(command))

1151

1844

else:

1152

1845

# Emit D-Bus signal

1153

1846

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

1154

dbus.Int64(condition),

1847

dbus.Int64(

1848

# This is specific to GNU libC

1849

(exitstatus << 8)

1850

| self.last_checker_signal),

1155

1851

dbus.String(command))

1156

1157

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

1158

*args, **kwargs)

1159

1852

return ret

1853

1160

1854

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

1161

old_checker = self.checker

1162

if self.checker is not None:

1163

old_checker_pid = self.checker.pid

1164

else:

1165

old_checker_pid = None

1855

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

1166

1856

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

1167

1857

# Only if new checker process was started

1168

1858

if (self.checker is not None

1170

1860

# Emit D-Bus signal

1171

1861

self.CheckerStarted(self.current_checker_command)

1172

1862

return r

1173

1863

1174

1864

def _reset_approved(self):

1175

1865

self.approved = None

1176

1866

return False

1177

1867

1178

1868

def approve(self, value=True):

1179

self.send_changedstate()

1180

1869

self.approved = value

1181

gobject.timeout_add(timedelta_to_milliseconds

1182

(self.approval_duration),

1183

self._reset_approved)

1184

1185

1186

## D-Bus methods, signals & properties

1187

_interface = "se.recompile.Mandos.Client"

1188

1189

## Signals

1190

1870

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

1871

* 1000), self._reset_approved)

1872

self.send_changedstate()

1873

1874

# D-Bus methods, signals & properties

1875

1876

# Interfaces

1877

1878

# Signals

1879

1191

1880

# CheckerCompleted - signal

1192

1881

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

1193

1882

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

1194

1883

"D-Bus signal"

1195

1884

pass

1196

1885

1197

1886

# CheckerStarted - signal

1198

1887

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

1199

1888

def CheckerStarted(self, command):

1200

1889

"D-Bus signal"

1201

1890

pass

1202

1891

1203

1892

# PropertyChanged - signal

1893

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

1204

1894

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

1205

1895

def PropertyChanged(self, property, value):

1206

1896

"D-Bus signal"

1207

1897

pass

1208

1898

1209

1899

# GotSecret - signal

1210

1900

@dbus.service.signal(_interface)

1211

1901

def GotSecret(self):

1214

1904

server to mandos-client

1215

1905

"""

1216

1906

pass

1217

1907

1218

1908

# Rejected - signal

1219

1909

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

1220

1910

def Rejected(self, reason):

1221

1911

"D-Bus signal"

1222

1912

pass

1223

1913

1224

1914

# NeedApproval - signal

1225

1915

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

1226

1916

def NeedApproval(self, timeout, default):

1227

1917

"D-Bus signal"

1228

1918

return self.need_approval()

1229

1230

# NeRwequest - signal

1231

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

1232

def NewRequest(self, ip):

1233

"""D-Bus signal

1234

Is sent after a client request a password.

1235

"""

1236

pass

1237

1238

## Methods

1239

1919

1920

# Methods

1921

1240

1922

# Approve - method

1241

1923

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

1242

1924

def Approve(self, value):

1243

1925

self.approve(value)

1244

1926

1245

1927

# CheckedOK - method

1246

1928

@dbus.service.method(_interface)

1247

1929

def CheckedOK(self):

1248

1930

self.checked_ok()

1249

1931

1250

1932

# Enable - method

1933

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

1251

1934

@dbus.service.method(_interface)

1252

1935

def Enable(self):

1253

1936

"D-Bus method"

1254

1937

self.enable()

1255

1938

1256

1939

# StartChecker - method

1940

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

1257

1941

@dbus.service.method(_interface)

1258

1942

def StartChecker(self):

1259

1943

"D-Bus method"

1260

1944

self.start_checker()

1261

1945

1262

1946

# Disable - method

1947

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

1263

1948

@dbus.service.method(_interface)

1264

1949

def Disable(self):

1265

1950

"D-Bus method"

1266

1951

self.disable()

1267

1952

1268

1953

# StopChecker - method

1954

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

1269

1955

@dbus.service.method(_interface)

1270

1956

def StopChecker(self):

1271

1957

self.stop_checker()

1272

1273

## Properties

1274

1958

1959

# Properties

1960

1275

1961

# ApprovalPending - property

1276

1962

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

1277

1963

def ApprovalPending_dbus_property(self):

1278

1964

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

1279

1965

1280

1966

# ApprovedByDefault - property

1281

@dbus_service_property(_interface, signature="b",

1967

@dbus_service_property(_interface,

1968

signature="b",

1282

1969

access="readwrite")

1283

1970

def ApprovedByDefault_dbus_property(self, value=None):

1284

1971

if value is None: # get

1285

1972

return dbus.Boolean(self.approved_by_default)

1286

1973

self.approved_by_default = bool(value)

1287

1974

1288

1975

# ApprovalDelay - property

1289

@dbus_service_property(_interface, signature="t",

1976

@dbus_service_property(_interface,

1977

signature="t",

1290

1978

access="readwrite")

1291

1979

def ApprovalDelay_dbus_property(self, value=None):

1292

1980

if value is None: # get

1293

return dbus.UInt64(self.approval_delay_milliseconds())

1981

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

1982

* 1000)

1294

1983

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

1295

1984

1296

1985

# ApprovalDuration - property

1297

@dbus_service_property(_interface, signature="t",

1986

@dbus_service_property(_interface,

1987

signature="t",

1298

1988

access="readwrite")

1299

1989

def ApprovalDuration_dbus_property(self, value=None):

1300

1990

if value is None: # get

1301

return dbus.UInt64(timedelta_to_milliseconds(

1302

self.approval_duration))

1991

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

1992

* 1000)

1303

1993

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

1304

1994

1305

1995

# Name - property

1996

@dbus_annotations(

1997

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

1306

1998

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

1307

1999

def Name_dbus_property(self):

1308

2000

return dbus.String(self.name)

1309

2001

1310

2002

# Fingerprint - property

2003

@dbus_annotations(

2004

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

1311

2005

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

1312

2006

def Fingerprint_dbus_property(self):

1313

2007

return dbus.String(self.fingerprint)

1314

2008

1315

2009

# Host - property

1316

@dbus_service_property(_interface, signature="s",

2010

@dbus_service_property(_interface,

2011

signature="s",

1317

2012

access="readwrite")

1318

2013

def Host_dbus_property(self, value=None):

1319

2014

if value is None: # get

1320

2015

return dbus.String(self.host)

1321

self.host = unicode(value)

1322

2016

self.host = str(value)

2017

1323

2018

# Created - property

2019

@dbus_annotations(

2020

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

1324

2021

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

1325

2022

def Created_dbus_property(self):

1326

2023

return datetime_to_dbus(self.created)

1327

2024

1328

2025

# LastEnabled - property

1329

2026

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

1330

2027

def LastEnabled_dbus_property(self):

1331

2028

return datetime_to_dbus(self.last_enabled)

1332

2029

1333

2030

# Enabled - property

1334

@dbus_service_property(_interface, signature="b",

2031

@dbus_service_property(_interface,

2032

signature="b",

1335

2033

access="readwrite")

1336

2034

def Enabled_dbus_property(self, value=None):

1337

2035

if value is None: # get

1340

2038

self.enable()

1341

2039

else:

1342

2040

self.disable()

1343

2041

1344

2042

# LastCheckedOK - property

1345

@dbus_service_property(_interface, signature="s",

2043

@dbus_service_property(_interface,

2044

signature="s",

1346

2045

access="readwrite")

1347

2046

def LastCheckedOK_dbus_property(self, value=None):

1348

2047

if value is not None:

1349

2048

self.checked_ok()

1350

2049

return

1351

2050

return datetime_to_dbus(self.last_checked_ok)

1352

2051

2052

# LastCheckerStatus - property

2053

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

2054

def LastCheckerStatus_dbus_property(self):

2055

return dbus.Int16(self.last_checker_status)

2056

1353

2057

# Expires - property

1354

2058

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

1355

2059

def Expires_dbus_property(self):

1356

2060

return datetime_to_dbus(self.expires)

1357

2061

1358

2062

# LastApprovalRequest - property

1359

2063

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

1360

2064

def LastApprovalRequest_dbus_property(self):

1361

2065

return datetime_to_dbus(self.last_approval_request)

1362

2066

1363

2067

# Timeout - property

1364

@dbus_service_property(_interface, signature="t",

2068

@dbus_service_property(_interface,

2069

signature="t",

1365

2070

access="readwrite")

1366

2071

def Timeout_dbus_property(self, value=None):

1367

2072

if value is None: # get

1368

return dbus.UInt64(self.timeout_milliseconds())

2073

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

2074

old_timeout = self.timeout

1369

2075

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

1370

# Reschedule timeout

2076

# Reschedule disabling

1371

2077

if self.enabled:

1372

2078

now = datetime.datetime.utcnow()

1373

time_to_die = timedelta_to_milliseconds(

1374

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

1375

if time_to_die <= 0:

2079

self.expires += self.timeout - old_timeout

2080

if self.expires <= now:

1376

2081

# The timeout has passed

1377

2082

self.disable()

1378

2083

else:

1379

self.expires = (now +

1380

datetime.timedelta(milliseconds =

1381

time_to_die))

1382

2084

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

1383

2085

is None):

1384

2086

return

1385

gobject.source_remove(self.disable_initiator_tag)

1386

self.disable_initiator_tag = (gobject.timeout_add

1387

(time_to_die,

1388

self.disable))

1389

2087

GLib.source_remove(self.disable_initiator_tag)

2088

self.disable_initiator_tag = GLib.timeout_add(

2089

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

2090

self.disable)

2091

1390

2092

# ExtendedTimeout - property

1391

@dbus_service_property(_interface, signature="t",

2093

@dbus_service_property(_interface,

2094

signature="t",

1392

2095

access="readwrite")

1393

2096

def ExtendedTimeout_dbus_property(self, value=None):

1394

2097

if value is None: # get

1395

return dbus.UInt64(self.extended_timeout_milliseconds())

2098

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

2099

* 1000)

1396

2100

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

1397

2101

1398

2102

# Interval - property

1399

@dbus_service_property(_interface, signature="t",

2103

@dbus_service_property(_interface,

2104

signature="t",

1400

2105

access="readwrite")

1401

2106

def Interval_dbus_property(self, value=None):

1402

2107

if value is None: # get

1403

return dbus.UInt64(self.interval_milliseconds())

2108

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

1404

2109

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

1405

2110

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

1406

2111

return

1407

2112

if self.enabled:

1408

2113

# Reschedule checker run

1409

gobject.source_remove(self.checker_initiator_tag)

1410

self.checker_initiator_tag = (gobject.timeout_add

1411

(value, self.start_checker))

1412

self.start_checker() # Start one now, too

1413

2114

GLib.source_remove(self.checker_initiator_tag)

2115

self.checker_initiator_tag = GLib.timeout_add(

2116

value, self.start_checker)

2117

self.start_checker() # Start one now, too

2118

1414

2119

# Checker - property

1415

@dbus_service_property(_interface, signature="s",

2120

@dbus_service_property(_interface,

2121

signature="s",

1416

2122

access="readwrite")

1417

2123

def Checker_dbus_property(self, value=None):

1418

2124

if value is None: # get

1419

2125

return dbus.String(self.checker_command)

1420

self.checker_command = unicode(value)

1421

2126

self.checker_command = str(value)

2127

1422

2128

# CheckerRunning - property

1423

@dbus_service_property(_interface, signature="b",

2129

@dbus_service_property(_interface,

2130

signature="b",

1424

2131

access="readwrite")

1425

2132

def CheckerRunning_dbus_property(self, value=None):

1426

2133

if value is None: # get

1429

2136

self.start_checker()

1430

2137

else:

1431

2138

self.stop_checker()

1432

2139

1433

2140

# ObjectPath - property

2141

@dbus_annotations(

2142

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

2143

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

1434

2144

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

1435

2145

def ObjectPath_dbus_property(self):

1436

return self.dbus_object_path # is already a dbus.ObjectPath

1437

2146

return self.dbus_object_path # is already a dbus.ObjectPath

2147

1438

2148

# Secret = property

1439

@dbus_service_property(_interface, signature="ay",

1440

access="write", byte_arrays=True)

2149

@dbus_annotations(

2150

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

2151

"invalidates"})

2152

@dbus_service_property(_interface,

2153

signature="ay",

2154

access="write",

2155

byte_arrays=True)

1441

2156

def Secret_dbus_property(self, value):

1442

self.secret = str(value)

1443

2157

self.secret = bytes(value)

2158

1444

2159

del _interface

1445

2160

1446

2161

1449

2164

self._pipe = child_pipe

1450

2165

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

1451

2166

if not self._pipe.recv():

1452

raise KeyError()

1453

2167

raise KeyError(fpr)

2168

1454

2169

def __getattribute__(self, name):

1455

2170

if name == '_pipe':

1456

2171

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

1459

2174

if data[0] == 'data':

1460

2175

return data[1]

1461

2176

if data[0] == 'function':

2177

1462

2178

def func(*args, **kwargs):

1463

2179

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

1464

2180

return self._pipe.recv()[1]

2181

1465

2182

return func

1466

2183

1467

2184

def __setattr__(self, name, value):

1468

2185

if name == '_pipe':

1469

2186

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

1470

2187

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

1471

2188

1472

2189

1473

class ClientDBusTransitional(ClientDBus):

1474

__metaclass__ = AlternateDBusNamesMetaclass

1475

1476

1477

2190

class ClientHandler(socketserver.BaseRequestHandler, object):

1478

2191

"""A class to handle client connections.

1479

2192

1480

2193

Instantiated once for each connection to handle it.

1481

2194

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

1482

2195

1483

2196

def handle(self):

1484

2197

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

1485

2198

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

1486

unicode(self.client_address))

2199

str(self.client_address))

1487

2200

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

1488

2201

self.server.child_pipe.fileno())

1489

1490

session = (gnutls.connection

1491

.ClientSession(self.request,

1492

gnutls.connection

1493

.X509Credentials()))

1494

1495

# Note: gnutls.connection.X509Credentials is really a

1496

# generic GnuTLS certificate credentials object so long as

1497

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

1498

# here despite using OpenPGP certificates.

1499

1500

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

1501

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

1502

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

1503

# "+DHE-DSS"))

2202

2203

session = gnutls.ClientSession(self.request)

2204

2205

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

2206

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

2207

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

2208

# "+DHE-DSS"))

1504

2209

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

1505

2210

priority = self.server.gnutls_priority

1506

2211

if priority is None:

1507

2212

priority = "NORMAL"

1508

(gnutls.library.functions

1509

.gnutls_priority_set_direct(session._c_object,

1510

priority, None))

1511

2213

gnutls.priority_set_direct(session._c_object,

2214

priority.encode("utf-8"),

2215

None)

2216

1512

2217

# Start communication using the Mandos protocol

1513

2218

# Get protocol number

1514

2219

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

1515

2220

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

1516

2221

try:

1517

2222

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

1518

raise RuntimeError

2223

raise RuntimeError(line)

1519

2224

except (ValueError, IndexError, RuntimeError) as error:

1520

2225

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

1521

2226

return

1522

2227

1523

2228

# Start GnuTLS connection

1524

2229

try:

1525

2230

session.handshake()

1526

except gnutls.errors.GNUTLSError as error:

2231

except gnutls.Error as error:

1527

2232

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

1528

2233

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

1529

2234

# established. Just abandon the request.

1530

2235

return

1531

2236

logger.debug("Handshake succeeded")

1532

2237

1533

2238

approval_required = False

1534

2239

try:

1535

2240

try:

1536

fpr = self.fingerprint(self.peer_certificate

1537

(session))

1538

except (TypeError,

1539

gnutls.errors.GNUTLSError) as error:

2241

fpr = self.fingerprint(

2242

self.peer_certificate(session))

2243

except (TypeError, gnutls.Error) as error:

1540

2244

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

1541

2245

return

1542

2246

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

1543

2247

1544

2248

try:

1545

2249

client = ProxyClient(child_pipe, fpr,

1546

2250

self.client_address)

1547

2251

except KeyError:

1548

2252

return

1549

1550

if self.server.use_dbus:

1551

# Emit D-Bus signal

1552

client.NewRequest(str(self.client_address))

1553

2253

1554

2254

if client.approval_delay:

1555

2255

delay = client.approval_delay

1556

2256

client.approvals_pending += 1

1557

2257

approval_required = True

1558

2258

1559

2259

while True:

1560

2260

if not client.enabled:

1561

2261

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

1562

client.name)

2262

client.name)

1563

2263

if self.server.use_dbus:

1564

2264

# Emit D-Bus signal

1565

2265

client.Rejected("Disabled")

1566

2266

return

1567

2267

1568

2268

if client.approved or not client.approval_delay:

1569

#We are approved or approval is disabled

2269

# We are approved or approval is disabled

1570

2270

break

1571

2271

elif client.approved is None:

1572

2272

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

1574

2274

if self.server.use_dbus:

1575

2275

# Emit D-Bus signal

1576

2276

client.NeedApproval(

1577

client.approval_delay_milliseconds(),

1578

client.approved_by_default)

2277

client.approval_delay.total_seconds()

2278

* 1000, client.approved_by_default)

1579

2279

else:

1580

2280

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

1581

2281

client.name)

1583

2283

# Emit D-Bus signal

1584

2284

client.Rejected("Denied")

1585

2285

return

1586

1587

#wait until timeout or approved

2286

2287

# wait until timeout or approved

1588

2288

time = datetime.datetime.now()

1589

2289

client.changedstate.acquire()

1590

(client.changedstate.wait

1591

(float(client.timedelta_to_milliseconds(delay)

1592

/ 1000)))

2290

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

1593

2291

client.changedstate.release()

1594

2292

time2 = datetime.datetime.now()

1595

2293

if (time2 - time) >= delay:

1605

2303

break

1606

2304

else:

1607

2305

delay -= time2 - time

1608

1609

sent_size = 0

1610

while sent_size < len(client.secret):

1611

try:

1612

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

1613

except gnutls.errors.GNUTLSError as error:

1614

logger.warning("gnutls send failed")

1615

return

1616

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

1617

sent, len(client.secret)

1618

- (sent_size + sent))

1619

sent_size += sent

1620

2306

2307

try:

2308

session.send(client.secret)

2309

except gnutls.Error as error:

2310

logger.warning("gnutls send failed",

2311

exc_info=error)

2312

return

2313

1621

2314

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

1622

2315

# bump the timeout using extended_timeout

1623

client.checked_ok(client.extended_timeout)

2316

client.bump_timeout(client.extended_timeout)

1624

2317

if self.server.use_dbus:

1625

2318

# Emit D-Bus signal

1626

2319

client.GotSecret()

1627

2320

1628

2321

finally:

1629

2322

if approval_required:

1630

2323

client.approvals_pending -= 1

1631

2324

try:

1632

2325

session.bye()

1633

except gnutls.errors.GNUTLSError as error:

1634

logger.warning("GnuTLS bye failed")

1635

2326

except gnutls.Error as error:

2327

logger.warning("GnuTLS bye failed",

2328

exc_info=error)

2329

1636

2330

@staticmethod

1637

2331

def peer_certificate(session):

1638

2332

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

1639

2333

# If not an OpenPGP certificate...

1640

if (gnutls.library.functions

1641

.gnutls_certificate_type_get(session._c_object)

1642

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1643

# ...do the normal thing

1644

return session.peer_certificate

2334

if (gnutls.certificate_type_get(session._c_object)

2335

!= gnutls.CRT_OPENPGP):

2336

# ...return invalid data

2337

return b""

1645

2338

list_size = ctypes.c_uint(1)

1646

cert_list = (gnutls.library.functions

1647

.gnutls_certificate_get_peers

2339

cert_list = (gnutls.certificate_get_peers

1648

2340

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

1649

2341

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

1650

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

1651

" certificate")

2342

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

1652

2343

if list_size.value == 0:

1653

2344

return None

1654

2345

cert = cert_list[0]

1655

2346

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

1656

2347

1657

2348

@staticmethod

1658

2349

def fingerprint(openpgp):

1659

2350

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1660

2351

# New GnuTLS "datum" with the OpenPGP public key

1661

datum = (gnutls.library.types

1662

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

1663

ctypes.POINTER

1664

(ctypes.c_ubyte)),

1665

ctypes.c_uint(len(openpgp))))

2352

datum = gnutls.datum_t(

2353

ctypes.cast(ctypes.c_char_p(openpgp),

2354

ctypes.POINTER(ctypes.c_ubyte)),

2355

ctypes.c_uint(len(openpgp)))

1666

2356

# New empty GnuTLS certificate

1667

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1668

(gnutls.library.functions

1669

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2357

crt = gnutls.openpgp_crt_t()

2358

gnutls.openpgp_crt_init(ctypes.byref(crt))

1670

2359

# Import the OpenPGP public key into the certificate

1671

(gnutls.library.functions

1672

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

1673

gnutls.library.constants

1674

.GNUTLS_OPENPGP_FMT_RAW))

2360

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

2361

gnutls.OPENPGP_FMT_RAW)

1675

2362

# Verify the self signature in the key

1676

2363

crtverify = ctypes.c_uint()

1677

(gnutls.library.functions

1678

.gnutls_openpgp_crt_verify_self(crt, 0,

1679

ctypes.byref(crtverify)))

2364

gnutls.openpgp_crt_verify_self(crt, 0,

2365

ctypes.byref(crtverify))

1680

2366

if crtverify.value != 0:

1681

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1682

raise (gnutls.errors.CertificateSecurityError

1683

("Verify failed"))

2367

gnutls.openpgp_crt_deinit(crt)

2368

raise gnutls.CertificateSecurityError(code

2369

=crtverify.value)

1684

2370

# New buffer for the fingerprint

1685

2371

buf = ctypes.create_string_buffer(20)

1686

2372

buf_len = ctypes.c_size_t()

1687

2373

# Get the fingerprint from the certificate into the buffer

1688

(gnutls.library.functions

1689

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

1690

ctypes.byref(buf_len)))

2374

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

2375

ctypes.byref(buf_len))

1691

2376

# Deinit the certificate

1692

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2377

gnutls.openpgp_crt_deinit(crt)

1693

2378

# Convert the buffer to a Python bytestring

1694

2379

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

1695

2380

# Convert the bytestring to hexadecimal notation

1699

2384

1700

2385

class MultiprocessingMixIn(object):

1701

2386

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

2387

1702

2388

def sub_process_main(self, request, address):

1703

2389

try:

1704

2390

self.finish_request(request, address)

1705

2391

except Exception:

1706

2392

self.handle_error(request, address)

1707

2393

self.close_request(request)

1708

2394

1709

2395

def process_request(self, request, address):

1710

2396

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

1711

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

1712

args = (request,

1713

address))

2397

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

2398

args=(request, address))

1714

2399

proc.start()

1715

2400

return proc

1716

2401

1717

2402

1718

2403

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1719

2404

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

2405

1720

2406

def process_request(self, request, client_address):

1721

2407

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

1722

2408

1723

2409

This function creates a new pipe in self.pipe

1724

2410

"""

1725

2411

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1726

2412

1727

2413

proc = MultiprocessingMixIn.process_request(self, request,

1728

2414

client_address)

1729

2415

self.child_pipe.close()

1730

2416

self.add_pipe(parent_pipe, proc)

1731

2417

1732

2418

def add_pipe(self, parent_pipe, proc):

1733

2419

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

1734

raise NotImplementedError

2420

raise NotImplementedError()

1735

2421

1736

2422

1737

2423

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1738

2424

socketserver.TCPServer, object):

1739

2425

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

1740

2426

1741

2427

Attributes:

1742

2428

enabled: Boolean; whether this server is activated yet

1743

2429

interface: None or a network interface name (string)

1744

2430

use_ipv6: Boolean; to use IPv6 or not

1745

2431

"""

2432

1746

2433

def __init__(self, server_address, RequestHandlerClass,

1747

interface=None, use_ipv6=True):

2434

interface=None,

2435

use_ipv6=True,

2436

socketfd=None):

2437

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

2438

creating a new one with socket.socket().

2439

"""

1748

2440

self.interface = interface

1749

2441

if use_ipv6:

1750

2442

self.address_family = socket.AF_INET6

2443

if socketfd is not None:

2444

# Save the file descriptor

2445

self.socketfd = socketfd

2446

# Save the original socket.socket() function

2447

self.socket_socket = socket.socket

2448

2449

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

2450

#

2451

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

2452

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

2453

# patching socket.socket.)

2454

#

2455

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

2456

@functools.wraps(socket.socket)

2457

def socket_wrapper(*args, **kwargs):

2458

# Restore original function so subsequent calls are

2459

# not affected.

2460

socket.socket = self.socket_socket

2461

del self.socket_socket

2462

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

2463

# saved file descriptor.

2464

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

2465

# Replace socket.socket() function with wrapper

2466

socket.socket = socket_wrapper

2467

# The socketserver.TCPServer.__init__ will call

2468

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

2469

# socket_wrapper(), if socketfd was set.

1751

2470

socketserver.TCPServer.__init__(self, server_address,

1752

2471

RequestHandlerClass)

2472

1753

2473

def server_bind(self):

1754

2474

"""This overrides the normal server_bind() function

1755

2475

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

1756

2476

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

2477

global SO_BINDTODEVICE

1757

2478

if self.interface is not None:

1758

2479

if SO_BINDTODEVICE is None:

1759

logger.error("SO_BINDTODEVICE does not exist;"

1760

" cannot bind to interface %s",

1761

self.interface)

1762

else:

1763

try:

1764

self.socket.setsockopt(socket.SOL_SOCKET,

1765

SO_BINDTODEVICE,

1766

str(self.interface

1767

+ '\0'))

1768

except socket.error as error:

1769

if error[0] == errno.EPERM:

1770

logger.error("No permission to"

1771

" bind to interface %s",

1772

self.interface)

1773

elif error[0] == errno.ENOPROTOOPT:

1774

logger.error("SO_BINDTODEVICE not available;"

1775

" cannot bind to interface %s",

1776

self.interface)

1777

else:

1778

raise

2480

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

2481

# common enough.

2482

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

2483

SO_BINDTODEVICE = 25

2484

try:

2485

self.socket.setsockopt(

2486

socket.SOL_SOCKET, SO_BINDTODEVICE,

2487

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

2488

except socket.error as error:

2489

if error.errno == errno.EPERM:

2490

logger.error("No permission to bind to"

2491

" interface %s", self.interface)

2492

elif error.errno == errno.ENOPROTOOPT:

2493

logger.error("SO_BINDTODEVICE not available;"

2494

" cannot bind to interface %s",

2495

self.interface)

2496

elif error.errno == errno.ENODEV:

2497

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

2498

" cannot bind", self.interface)

2499

else:

2500

raise

1779

2501

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

1780

2502

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

1781

2503

if not self.server_address[0]:

1782

2504

if self.address_family == socket.AF_INET6:

1783

any_address = "::" # in6addr_any

2505

any_address = "::" # in6addr_any

1784

2506

else:

1785

any_address = socket.INADDR_ANY

2507

any_address = "0.0.0.0" # INADDR_ANY

1786

2508

self.server_address = (any_address,

1787

2509

self.server_address[1])

1788

2510

elif not self.server_address[1]:

1789

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

1790

0)

2511

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

1791

2512

# if self.interface:

1792

2513

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

1793

2514

# 0, # port

1799

2520

1800

2521

class MandosServer(IPv6_TCPServer):

1801

2522

"""Mandos server.

1802

2523

1803

2524

Attributes:

1804

2525

clients: set of Client objects

1805

2526

gnutls_priority GnuTLS priority string

1806

2527

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

1807

1808

Assumes a gobject.MainLoop event loop.

2528

2529

Assumes a GLib.MainLoop event loop.

1809

2530

"""

2531

1810

2532

def __init__(self, server_address, RequestHandlerClass,

1811

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

1812

gnutls_priority=None, use_dbus=True):

2533

interface=None,

2534

use_ipv6=True,

2535

clients=None,

2536

gnutls_priority=None,

2537

use_dbus=True,

2538

socketfd=None):

1813

2539

self.enabled = False

1814

2540

self.clients = clients

1815

2541

if self.clients is None:

1818

2544

self.gnutls_priority = gnutls_priority

1819

2545

IPv6_TCPServer.__init__(self, server_address,

1820

2546

RequestHandlerClass,

1821

interface = interface,

1822

use_ipv6 = use_ipv6)

2547

interface=interface,

2548

use_ipv6=use_ipv6,

2549

socketfd=socketfd)

2550

1823

2551

def server_activate(self):

1824

2552

if self.enabled:

1825

2553

return socketserver.TCPServer.server_activate(self)

1826

2554

1827

2555

def enable(self):

1828

2556

self.enabled = True

1829

2557

1830

2558

def add_pipe(self, parent_pipe, proc):

1831

2559

# Call "handle_ipc" for both data and EOF events

1832

gobject.io_add_watch(parent_pipe.fileno(),

1833

gobject.IO_IN | gobject.IO_HUP,

1834

functools.partial(self.handle_ipc,

1835

parent_pipe =

1836

parent_pipe,

1837

proc = proc))

1838

1839

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

1840

proc = None, client_object=None):

1841

condition_names = {

1842

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

1843

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

1844

# blocking).

1845

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

1846

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

1847

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

1848

# broken, usually for pipes and

1849

# sockets).

1850

}

1851

conditions_string = ' | '.join(name

1852

for cond, name in

1853

condition_names.iteritems()

1854

if cond & condition)

2560

GLib.io_add_watch(

2561

parent_pipe.fileno(),

2562

GLib.IO_IN | GLib.IO_HUP,

2563

functools.partial(self.handle_ipc,

2564

parent_pipe=parent_pipe,

2565

proc=proc))

2566

2567

def handle_ipc(self, source, condition,

2568

parent_pipe=None,

2569

proc=None,

2570

client_object=None):

1855

2571

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

1856

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

2572

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

1857

2573

# Wait for other process to exit

1858

2574

proc.join()

1859

2575

return False

1860

2576

1861

2577

# Read a request from the child

1862

2578

request = parent_pipe.recv()

1863

2579

command = request[0]

1864

2580

1865

2581

if command == 'init':

1866

fpr = request[1]

2582

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

1867

2583

address = request[2]

1868

1869

for c in self.clients.itervalues():

2584

2585

for c in self.clients.values():

1870

2586

if c.fingerprint == fpr:

1871

2587

client = c

1872

2588

break

1879

2595

address[0])

1880

2596

parent_pipe.send(False)

1881

2597

return False

1882

1883

gobject.io_add_watch(parent_pipe.fileno(),

1884

gobject.IO_IN | gobject.IO_HUP,

1885

functools.partial(self.handle_ipc,

1886

parent_pipe =

1887

parent_pipe,

1888

proc = proc,

1889

client_object =

1890

client))

2598

2599

GLib.io_add_watch(

2600

parent_pipe.fileno(),

2601

GLib.IO_IN | GLib.IO_HUP,

2602

functools.partial(self.handle_ipc,

2603

parent_pipe=parent_pipe,

2604

proc=proc,

2605

client_object=client))

1891

2606

parent_pipe.send(True)

1892

2607

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

1893

2608

# same fileno

1896

2611

funcname = request[1]

1897

2612

args = request[2]

1898

2613

kwargs = request[3]

1899

2614

1900

2615

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

1901

2616

funcname)(*args,

1902

**kwargs)))

1903

2617

**kwargs)))

2618

1904

2619

if command == 'getattr':

1905

2620

attrname = request[1]

1906

if callable(client_object.__getattribute__(attrname)):

1907

parent_pipe.send(('function',))

2621

if isinstance(client_object.__getattribute__(attrname),

2622

collections.Callable):

2623

parent_pipe.send(('function', ))

1908

2624

else:

1909

parent_pipe.send(('data', client_object

1910

.__getattribute__(attrname)))

1911

2625

parent_pipe.send((

2626

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

2627

1912

2628

if command == 'setattr':

1913

2629

attrname = request[1]

1914

2630

value = request[2]

1915

2631

setattr(client_object, attrname, value)

1916

2632

1917

2633

return True

1918

2634

1919

2635

2636

def rfc3339_duration_to_delta(duration):

2637

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

2638

2639

>>> rfc3339_duration_to_delta("P7D")

2640

datetime.timedelta(7)

2641

>>> rfc3339_duration_to_delta("PT60S")

2642

datetime.timedelta(0, 60)

2643

>>> rfc3339_duration_to_delta("PT60M")

2644

datetime.timedelta(0, 3600)

2645

>>> rfc3339_duration_to_delta("PT24H")

2646

datetime.timedelta(1)

2647

>>> rfc3339_duration_to_delta("P1W")

2648

datetime.timedelta(7)

2649

>>> rfc3339_duration_to_delta("PT5M30S")

2650

datetime.timedelta(0, 330)

2651

>>> rfc3339_duration_to_delta("P1DT3M20S")

2652

datetime.timedelta(1, 200)

2653

"""

2654

2655

# Parsing an RFC 3339 duration with regular expressions is not

2656

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

2657

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

2658

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

2659

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

2660

# avoid excessive use of external libraries.

2661

2662

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

2663

Token = collections.namedtuple("Token", (

2664

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

2665

# a "group" containing digits

2666

"value", # datetime.timedelta or None

2667

"followers")) # Tokens valid after this token

2668

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

2669

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

2670

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

2671

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

2672

datetime.timedelta(seconds=1),

2673

frozenset((token_end, )))

2674

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

2675

datetime.timedelta(minutes=1),

2676

frozenset((token_second, token_end)))

2677

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

2678

datetime.timedelta(hours=1),

2679

frozenset((token_minute, token_end)))

2680

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

2681

None,

2682

frozenset((token_hour, token_minute,

2683

token_second)))

2684

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

2685

datetime.timedelta(days=1),

2686

frozenset((token_time, token_end)))

2687

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

2688

datetime.timedelta(weeks=4),

2689

frozenset((token_day, token_end)))

2690

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

2691

datetime.timedelta(weeks=52),

2692

frozenset((token_month, token_end)))

2693

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

2694

datetime.timedelta(weeks=1),

2695

frozenset((token_end, )))

2696

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

2697

frozenset((token_year, token_month,

2698

token_day, token_time,

2699

token_week)))

2700

# Define starting values:

2701

# Value so far

2702

value = datetime.timedelta()

2703

found_token = None

2704

# Following valid tokens

2705

followers = frozenset((token_duration, ))

2706

# String left to parse

2707

s = duration

2708

# Loop until end token is found

2709

while found_token is not token_end:

2710

# Search for any currently valid tokens

2711

for token in followers:

2712

match = token.regexp.match(s)

2713

if match is not None:

2714

# Token found

2715

if token.value is not None:

2716

# Value found, parse digits

2717

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

2718

# Add to value so far

2719

value += factor * token.value

2720

# Strip token from string

2721

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

2722

# Go to found token

2723

found_token = token

2724

# Set valid next tokens

2725

followers = found_token.followers

2726

break

2727

else:

2728

# No currently valid tokens were found

2729

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

2730

.format(duration))

2731

# End token found

2732

return value

2733

2734

1920

2735

def string_to_delta(interval):

1921

2736

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

1922

2737

1923

2738

>>> string_to_delta('7d')

1924

2739

datetime.timedelta(7)

1925

2740

>>> string_to_delta('60s')

1933

2748

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

1934

2749

datetime.timedelta(0, 330)

1935

2750

"""

2751

2752

try:

2753

return rfc3339_duration_to_delta(interval)

2754

except ValueError:

2755

pass

2756

1936

2757

timevalue = datetime.timedelta(0)

1937

2758

for s in interval.split():

1938

2759

try:

1939

suffix = unicode(s[-1])

2760

suffix = s[-1]

1940

2761

value = int(s[:-1])

1941

2762

if suffix == "d":

1942

2763

delta = datetime.timedelta(value)

1949

2770

elif suffix == "w":

1950

2771

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

1951

2772

else:

1952

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

1953

except (ValueError, IndexError) as e:

2773

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

2774

except IndexError as e:

1954

2775

raise ValueError(*(e.args))

1955

2776

timevalue += delta

1956

2777

return timevalue

1957

2778

1958

2779

1959

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

2780

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

1960

2781

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

1961

2782

1962

2783

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

1963

2784

if os.fork():

1964

2785

sys.exit()

1969

2790

sys.exit()

1970

2791

if not noclose:

1971

2792

# Close all standard open file descriptors

1972

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

2793

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

1973

2794

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

1974

2795

raise OSError(errno.ENODEV,

1975

"%s not a character device"

1976

% os.path.devnull)

2796

"{} not a character device"

2797

.format(os.devnull))

1977

2798

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

1978

2799

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

1979

2800

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

1982

2803

1983

2804

1984

2805

def main():

1985

2806

1986

2807

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

1987

2808

# Parsing of options, both command line and config file

1988

2809

1989

2810

parser = argparse.ArgumentParser()

1990

2811

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

1991

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

2812

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

1992

2813

help="show version number and exit")

1993

2814

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

1994

2815

help="Bind to interface IF")

2000

2821

help="Run self-test")

2001

2822

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

2002

2823

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

2003

" to terminal")

2824

" to terminal", default=None)

2004

2825

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

2005

2826

help="Debug level for stdout output")

2006

2827

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

2013

2834

" files")

2014

2835

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

2015

2836

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

2016

" system bus interface")

2837

" system bus interface", default=None)

2017

2838

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

2018

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

2839

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

2840

default=None)

2019

2841

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

2020

2842

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

2021

" state")

2843

" state", default=None)

2844

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

2845

help="Specify a file descriptor to a network"

2846

" socket to use instead of creating one")

2022

2847

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

2023

2848

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

2024

2849

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

2850

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

2851

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

2852

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

2853

default=None)

2854

2025

2855

options = parser.parse_args()

2026

2856

2027

2857

if options.check:

2028

2858

import doctest

2029

doctest.testmod()

2030

sys.exit()

2031

2859

fail_count, test_count = doctest.testmod()

2860

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

2861

2032

2862

# Default values for config file for server-global settings

2033

server_defaults = { "interface": "",

2034

"address": "",

2035

"port": "",

2036

"debug": "False",

2037

"priority":

2038

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

2039

"servicename": "Mandos",

2040

"use_dbus": "True",

2041

"use_ipv6": "True",

2042

"debuglevel": "",

2043

"restore": "True",

2044

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

2045

}

2046

2863

server_defaults = {"interface": "",

2864

"address": "",

2865

"port": "",

2866

"debug": "False",

2867

"priority":

2868

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

2869

":+SIGN-DSA-SHA256",

2870

"servicename": "Mandos",

2871

"use_dbus": "True",

2872

"use_ipv6": "True",

2873

"debuglevel": "",

2874

"restore": "True",

2875

"socket": "",

2876

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

2877

"foreground": "False",

2878

"zeroconf": "True",

2879

}

2880

2047

2881

# Parse config file for server-global settings

2048

2882

server_config = configparser.SafeConfigParser(server_defaults)

2049

2883

del server_defaults

2050

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

2051

"mandos.conf"))

2884

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

2052

2885

# Convert the SafeConfigParser object to a dict

2053

2886

server_settings = server_config.defaults()

2054

2887

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

2055

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

2888

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

2889

"foreground", "zeroconf"):

2056

2890

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

2057

2891

option)

2058

2892

if server_settings["port"]:

2059

2893

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

2060

2894

"port")

2895

if server_settings["socket"]:

2896

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

2897

"socket")

2898

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

2899

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

2900

# happen with a supplied network socket.

2901

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

2902

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

2903

["socket"])

2061

2904

del server_config

2062

2905

2063

2906

# Override the settings from the config file with command line

2064

2907

# options, if set.

2065

2908

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

2066

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

2067

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

2068

"statedir"):

2909

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

2910

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

2911

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

2069

2912

value = getattr(options, option)

2070

2913

if value is not None:

2071

2914

server_settings[option] = value

2072

2915

del options

2073

2916

# Force all strings to be unicode

2074

2917

for option in server_settings.keys():

2075

if type(server_settings[option]) is str:

2076

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

2918

if isinstance(server_settings[option], bytes):

2919

server_settings[option] = (server_settings[option]

2920

.decode("utf-8"))

2921

# Force all boolean options to be boolean

2922

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

2923

"foreground", "zeroconf"):

2924

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

2925

# Debug implies foreground

2926

if server_settings["debug"]:

2927

server_settings["foreground"] = True

2077

2928

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

2078

2929

2079

2930

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

2080

2931

2932

if (not server_settings["zeroconf"]

2933

and not (server_settings["port"]

2934

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

2935

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

2936

2081

2937

# For convenience

2082

2938

debug = server_settings["debug"]

2083

2939

debuglevel = server_settings["debuglevel"]

2085

2941

use_ipv6 = server_settings["use_ipv6"]

2086

2942

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

2087

2943

stored_state_file)

2088

2944

foreground = server_settings["foreground"]

2945

zeroconf = server_settings["zeroconf"]

2946

2089

2947

if debug:

2090

2948

initlogger(debug, logging.DEBUG)

2091

2949

else:

2094

2952

else:

2095

2953

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

2096

2954

initlogger(debug, level)

2097

2955

2098

2956

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

2099

syslogger.setFormatter(logging.Formatter

2100

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

2101

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

2102

% server_settings["servicename"]))

2103

2957

syslogger.setFormatter(

2958

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

2959

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

2960

server_settings["servicename"])))

2961

2104

2962

# Parse config file with clients

2105

2963

client_config = configparser.SafeConfigParser(Client

2106

2964

.client_defaults)

2107

2965

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

2108

2966

"clients.conf"))

2109

2967

2110

2968

global mandos_dbus_service

2111

2969

mandos_dbus_service = None

2112

2113

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

2114

server_settings["port"]),

2115

ClientHandler,

2116

interface=(server_settings["interface"]

2117

or None),

2118

use_ipv6=use_ipv6,

2119

gnutls_priority=

2120

server_settings["priority"],

2121

use_dbus=use_dbus)

2122

if not debug:

2123

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

2124

try:

2125

pidfile = open(pidfilename, "w")

2126

except IOError:

2127

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

2128

2129

try:

2130

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

2131

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

2132

except KeyError:

2133

try:

2134

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

2135

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

2970

2971

socketfd = None

2972

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

2973

socketfd = server_settings["socket"]

2974

tcp_server = MandosServer(

2975

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

2976

ClientHandler,

2977

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

2978

use_ipv6=use_ipv6,

2979

gnutls_priority=server_settings["priority"],

2980

use_dbus=use_dbus,

2981

socketfd=socketfd)

2982

if not foreground:

2983

pidfilename = "/run/mandos.pid"

2984

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

2985

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

2986

pidfile = None

2987

try:

2988

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

2989

except IOError as e:

2990

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

2991

exc_info=e)

2992

2993

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

2994

("mandos", "mandos"),

2995

("nobody", "nogroup")):

2996

try:

2997

uid = pwd.getpwnam(name).pw_uid

2998

gid = pwd.getpwnam(group).pw_gid

2999

break

2136

3000

except KeyError:

2137

try:

2138

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

2139

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

2140

except KeyError:

2141

uid = 65534

2142

gid = 65534

3001

continue

3002

else:

3003

uid = 65534

3004

gid = 65534

2143

3005

try:

2144

3006

os.setgid(gid)

2145

3007

os.setuid(uid)

3008

if debug:

3009

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

3010

gid))

2146

3011

except OSError as error:

2147

if error[0] != errno.EPERM:

2148

raise error

2149

3012

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

3013

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

3014

if error.errno != errno.EPERM:

3015

raise

3016

2150

3017

if debug:

2151

3018

# Enable all possible GnuTLS debugging

2152

3019

2153

3020

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

2154

3021

# - GnuTLS manual

2155

gnutls.library.functions.gnutls_global_set_log_level(11)

2156

2157

@gnutls.library.types.gnutls_log_func

3022

gnutls.global_set_log_level(11)

3023

3024

@gnutls.log_func

2158

3025

def debug_gnutls(level, string):

2159

3026

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

2160

2161

(gnutls.library.functions

2162

.gnutls_global_set_log_function(debug_gnutls))

2163

3027

3028

gnutls.global_set_log_function(debug_gnutls)

3029

2164

3030

# Redirect stdin so all checkers get /dev/null

2165

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

3031

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

2166

3032

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

2167

3033

if null > 2:

2168

3034

os.close(null)

2169

3035

2170

3036

# Need to fork before connecting to D-Bus

2171

if not debug:

3037

if not foreground:

2172

3038

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

2173

3039

daemon()

2174

2175

gobject.threads_init()

2176

3040

3041

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

3042

# to inform GLib that threads will be used.

3043

GLib.threads_init()

3044

2177

3045

global main_loop

2178

3046

# From the Avahi example code

2179

DBusGMainLoop(set_as_default=True )

2180

main_loop = gobject.MainLoop()

3047

DBusGMainLoop(set_as_default=True)

3048

main_loop = GLib.MainLoop()

2181

3049

bus = dbus.SystemBus()

2182

3050

# End of Avahi example code

2183

3051

if use_dbus:

2184

3052

try:

2185

3053

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

2186

bus, do_not_queue=True)

2187

old_bus_name = (dbus.service.BusName

2188

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

2189

do_not_queue=True))

2190

except dbus.exceptions.NameExistsException as e:

2191

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

3054

bus,

3055

do_not_queue=True)

3056

old_bus_name = dbus.service.BusName(

3057

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

3058

do_not_queue=True)

3059

except dbus.exceptions.DBusException as e:

3060

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

2192

3061

use_dbus = False

2193

3062

server_settings["use_dbus"] = False

2194

3063

tcp_server.use_dbus = False

2195

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2196

service = AvahiServiceToSyslog(name =

2197

server_settings["servicename"],

2198

servicetype = "_mandos._tcp",

2199

protocol = protocol, bus = bus)

2200

if server_settings["interface"]:

2201

service.interface = (if_nametoindex

2202

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

2203

3064

if zeroconf:

3065

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3066

service = AvahiServiceToSyslog(

3067

name=server_settings["servicename"],

3068

servicetype="_mandos._tcp",

3069

protocol=protocol,

3070

bus=bus)

3071

if server_settings["interface"]:

3072

service.interface = if_nametoindex(

3073

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

3074

2204

3075

global multiprocessing_manager

2205

3076

multiprocessing_manager = multiprocessing.Manager()

2206

3077

2207

3078

client_class = Client

2208

3079

if use_dbus:

2209

client_class = functools.partial(ClientDBusTransitional,

2210

bus = bus)

2211

3080

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

3081

2212

3082

client_settings = Client.config_parser(client_config)

2213

3083

old_client_settings = {}

2214

3084

clients_data = {}

2215

3085

3086

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

3087

global wnull

3088

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

3089

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

3090

# mode

3091

if debug or not foreground:

3092

wnull.close()

3093

2216

3094

# Get client data and settings from last running state.

2217

3095

if server_settings["restore"]:

2218

3096

try:

2219

3097

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

2220

clients_data, old_client_settings = (pickle.load

2221

(stored_state))

3098

if sys.version_info.major == 2:

3099

clients_data, old_client_settings = pickle.load(

3100

stored_state)

3101

else:

3102

bytes_clients_data, bytes_old_client_settings = (

3103

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

3104

# Fix bytes to strings

3105

# clients_data

3106

# .keys()

3107

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

3108

if isinstance(key, bytes)

3109

else key): value

3110

for key, value in

3111

bytes_clients_data.items()}

3112

del bytes_clients_data

3113

for key in clients_data:

3114

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

3115

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

3116

for k, v in

3117

clients_data[key].items()}

3118

clients_data[key] = value

3119

# .client_structure

3120

value["client_structure"] = [

3121

(s.decode("utf-8")

3122

if isinstance(s, bytes)

3123

else s) for s in

3124

value["client_structure"]]

3125

# .name & .host

3126

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

3127

if isinstance(value[k], bytes):

3128

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

3129

# old_client_settings

3130

# .keys()

3131

old_client_settings = {

3132

(key.decode("utf-8")

3133

if isinstance(key, bytes)

3134

else key): value

3135

for key, value in

3136

bytes_old_client_settings.items()}

3137

del bytes_old_client_settings

3138

# .host

3139

for value in old_client_settings.values():

3140

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

3141

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

3142

.decode("utf-8"))

2222

3143

os.remove(stored_state_path)

2223

3144

except IOError as e:

2224

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

2225

.format(e))

2226

if e.errno != errno.ENOENT:

3145

if e.errno == errno.ENOENT:

3146

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

3147

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

3148

else:

3149

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

3150

exc_info=e)

2227

3151

raise

2228

3152

except EOFError as e:

2229

3153

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

2230

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

2231

3154

"EOFError:",

3155

exc_info=e)

3156

2232

3157

with PGPEngine() as pgp:

2233

for client_name, client in clients_data.iteritems():

3158

for client_name, client in clients_data.items():

3159

# Skip removed clients

3160

if client_name not in client_settings:

3161

continue

3162

2234

3163

# Decide which value to use after restoring saved state.

2235

3164

# We have three different values: Old config file,

2236

3165

# new config file, and saved state.

2241

3170

# For each value in new config, check if it

2242

3171

# differs from the old config value (Except for

2243

3172

# the "secret" attribute)

2244

if (name != "secret" and

2245

value != old_client_settings[client_name]

2246

[name]):

3173

if (name != "secret"

3174

and (value !=

3175

old_client_settings[client_name][name])):

2247

3176

client[name] = value

2248

3177

except KeyError:

2249

3178

pass

2250

3179

2251

3180

# Clients who has passed its expire date can still be

2252

# enabled if its last checker was successful. Clients

2253

# whose checker failed before we stored its state is

2254

# assumed to have failed all checkers during downtime.

3181

# enabled if its last checker was successful. A Client

3182

# whose checker succeeded before we stored its state is

3183

# assumed to have successfully run all checkers during

3184

# downtime.

2255

3185

if client["enabled"]:

2256

3186

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

2257

3187

if not client["last_checked_ok"]:

2258

3188

logger.warning(

2259

"disabling client {0} - Client never "

2260

"performed a successfull checker"

2261

.format(client["name"]))

3189

"disabling client {} - Client never "

3190

"performed a successful checker".format(

3191

client_name))

2262

3192

client["enabled"] = False

2263

3193

elif client["last_checker_status"] != 0:

2264

3194

logger.warning(

2265

"disabling client {0} - Client "

2266

"last checker failed with error code {1}"

2267

.format(client["name"],

2268

client["last_checker_status"]))

3195

"disabling client {} - Client last"

3196

" checker failed with error code"

3197

" {}".format(

3198

client_name,

3199

client["last_checker_status"]))

2269

3200

client["enabled"] = False

2270

3201

else:

2271

client["expires"] = (datetime.datetime

2272

.utcnow()

2273

+ client["timeout"])

3202

client["expires"] = (

3203

datetime.datetime.utcnow()

3204

+ client["timeout"])

2274

3205

logger.debug("Last checker succeeded,"

2275

" keeping {0} enabled"

2276

.format(client["name"]))

3206

" keeping {} enabled".format(

3207

client_name))

2277

3208

try:

2278

client["secret"] = (

2279

pgp.decrypt(client["encrypted_secret"],

2280

client_settings[client_name]

2281

["secret"]))

3209

client["secret"] = pgp.decrypt(

3210

client["encrypted_secret"],

3211

client_settings[client_name]["secret"])

2282

3212

except PGPError:

2283

3213

# If decryption fails, we use secret from new settings

2284

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

2285

.format(client_name))

2286

client["secret"] = (

2287

client_settings[client_name]["secret"])

3214

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

3215

client_name))

3216

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

3217

["secret"])

2288

3218

2289

2290

3219

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

2291

3220

for client_name in (set(old_client_settings)

2292

3221

- set(client_settings)):

2295

3224

- set(old_client_settings)):

2296

3225

clients_data[client_name] = client_settings[client_name]

2297

3226

2298

# Create clients all clients

2299

for client_name, client in clients_data.iteritems():

3227

# Create all client objects

3228

for client_name, client in clients_data.items():

2300

3229

tcp_server.clients[client_name] = client_class(

2301

name = client_name, settings = client)

2302

3230

name=client_name,

3231

settings=client,

3232

server_settings=server_settings)

3233

2303

3234

if not tcp_server.clients:

2304

3235

logger.warning("No clients defined")

2305

2306

if not debug:

2307

try:

2308

with pidfile:

2309

pid = os.getpid()

2310

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

2311

del pidfile

2312

except IOError:

2313

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

2314

pidfilename, pid)

2315

except NameError:

2316

# "pidfile" was never created

2317

pass

3236

3237

if not foreground:

3238

if pidfile is not None:

3239

pid = os.getpid()

3240

try:

3241

with pidfile:

3242

print(pid, file=pidfile)

3243

except IOError:

3244

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

3245

pidfilename, pid)

3246

del pidfile

2318

3247

del pidfilename

2319

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

2320

2321

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

2322

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

2323

3248

3249

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

3250

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3251

lambda: main_loop.quit() and False)

3252

2324

3253

if use_dbus:

2325

class MandosDBusService(dbus.service.Object):

3254

3255

@alternate_dbus_interfaces(

3256

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

3257

class MandosDBusService(DBusObjectWithObjectManager):

2326

3258

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

3259

2327

3260

def __init__(self):

2328

3261

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

3262

2329

3263

_interface = "se.recompile.Mandos"

2330

3264

2331

3265

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

2332

3266

def ClientAdded(self, objpath):

2333

3267

"D-Bus signal"

2334

3268

pass

2335

3269

2336

3270

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

2337

3271

def ClientNotFound(self, fingerprint, address):

2338

3272

"D-Bus signal"

2339

3273

pass

2340

3274

3275

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

3276

"true"})

2341

3277

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

2342

3278

def ClientRemoved(self, objpath, name):

2343

3279

"D-Bus signal"

2344

3280

pass

2345

3281

3282

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

3283

"true"})

2346

3284

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

2347

3285

def GetAllClients(self):

2348

3286

"D-Bus method"

2349

return dbus.Array(c.dbus_object_path

2350

for c in

2351

tcp_server.clients.itervalues())

2352

3287

return dbus.Array(c.dbus_object_path for c in

3288

tcp_server.clients.values())

3289

3290

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

3291

"true"})

2353

3292

@dbus.service.method(_interface,

2354

3293

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

2355

3294

def GetAllClientsWithProperties(self):

2356

3295

"D-Bus method"

2357

3296

return dbus.Dictionary(

2358

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

2359

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

3297

{c.dbus_object_path: c.GetAll(

3298

"se.recompile.Mandos.Client")

3299

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

2360

3300

signature="oa{sv}")

2361

3301

2362

3302

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

2363

3303

def RemoveClient(self, object_path):

2364

3304

"D-Bus method"

2365

for c in tcp_server.clients.itervalues():

3305

for c in tcp_server.clients.values():

2366

3306

if c.dbus_object_path == object_path:

2367

3307

del tcp_server.clients[c.name]

2368

3308

c.remove_from_connection()

2369

# Don't signal anything except ClientRemoved

3309

# Don't signal the disabling

2370

3310

c.disable(quiet=True)

2371

# Emit D-Bus signal

2372

self.ClientRemoved(object_path, c.name)

3311

# Emit D-Bus signal for removal

3312

self.client_removed_signal(c)

2373

3313

return

2374

3314

raise KeyError(object_path)

2375

3315

2376

3316

del _interface

2377

2378

class MandosDBusServiceTransitional(MandosDBusService):

2379

__metaclass__ = AlternateDBusNamesMetaclass

2380

mandos_dbus_service = MandosDBusServiceTransitional()

2381

3317

3318

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3319

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

3320

def GetManagedObjects(self):

3321

"""D-Bus method"""

3322

return dbus.Dictionary(

3323

{client.dbus_object_path:

3324

dbus.Dictionary(

3325

{interface: client.GetAll(interface)

3326

for interface in

3327

client._get_all_interface_names()})

3328

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

3329

3330

def client_added_signal(self, client):

3331

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

3332

if use_dbus:

3333

# New standard signal

3334

self.InterfacesAdded(

3335

client.dbus_object_path,

3336

dbus.Dictionary(

3337

{interface: client.GetAll(interface)

3338

for interface in

3339

client._get_all_interface_names()}))

3340

# Old signal

3341

self.ClientAdded(client.dbus_object_path)

3342

3343

def client_removed_signal(self, client):

3344

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

3345

if use_dbus:

3346

# New standard signal

3347

self.InterfacesRemoved(

3348

client.dbus_object_path,

3349

client._get_all_interface_names())

3350

# Old signal

3351

self.ClientRemoved(client.dbus_object_path,

3352

client.name)

3353

3354

mandos_dbus_service = MandosDBusService()

3355

3356

# Save modules to variables to exempt the modules from being

3357

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

3358

mp = multiprocessing

3359

wn = wnull

3360

2382

3361

def cleanup():

2383

3362

"Cleanup function; run on exit"

2384

service.cleanup()

2385

2386

multiprocessing.active_children()

3363

if zeroconf:

3364

service.cleanup()

3365

3366

mp.active_children()

3367

wn.close()

2387

3368

if not (tcp_server.clients or client_settings):

2388

3369

return

2389

3370

2390

3371

# Store client before exiting. Secrets are encrypted with key

2391

3372

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

2392

3373

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

2393

3374

clients = {}

2394

3375

with PGPEngine() as pgp:

2395

for client in tcp_server.clients.itervalues():

3376

for client in tcp_server.clients.values():

2396

3377

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

2397

3378

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

2398

3379

key)

2399

3380

client_dict = {}

2400

3381

2401

3382

# A list of attributes that can not be pickled

2402

3383

# + secret.

2403

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

2404

"checker"))

2405

for name, typ in (inspect.getmembers

2406

(dbus.service.Object)):

3384

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

3385

"checker", "server_settings"}

3386

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

3387

.Object):

2407

3388

exclude.add(name)

2408

3389

2409

3390

client_dict["encrypted_secret"] = (client

2410

3391

.encrypted_secret)

2411

3392

for attr in client.client_structure:

2412

3393

if attr not in exclude:

2413

3394

client_dict[attr] = getattr(client, attr)

2414

3395

2415

3396

clients[client.name] = client_dict

2416

3397

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

2417

3398

2418

3399

try:

2419

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

2420

prefix="clients-",

2421

dir=os.path.dirname

2422

(stored_state_path))

2423

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

2424

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

3400

with tempfile.NamedTemporaryFile(

3401

mode='wb',

3402

suffix=".pickle",

3403

prefix='clients-',

3404

dir=os.path.dirname(stored_state_path),

3405

delete=False) as stored_state:

3406

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

3407

protocol=2)

3408

tempname = stored_state.name

2425

3409

os.rename(tempname, stored_state_path)

2426

3410

except (IOError, OSError) as e:

2427

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

2428

.format(e))

2429

3411

if not debug:

2430

3412

try:

2431

3413

os.remove(tempname)

2432

3414

except NameError:

2433

3415

pass

2434

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

2435

errno.EEXIST)):

2436

raise e

2437

3416

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

3417

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

3418

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

3419

else:

3420

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

3421

exc_info=e)

3422

raise

3423

2438

3424

# Delete all clients, and settings from config

2439

3425

while tcp_server.clients:

2440

3426

name, client = tcp_server.clients.popitem()

2441

3427

if use_dbus:

2442

3428

client.remove_from_connection()

2443

# Don't signal anything except ClientRemoved

3429

# Don't signal the disabling

2444

3430

client.disable(quiet=True)

3431

# Emit D-Bus signal for removal

2445

3432

if use_dbus:

2446

# Emit D-Bus signal

2447

mandos_dbus_service.ClientRemoved(client

2448

.dbus_object_path,

2449

client.name)

3433

mandos_dbus_service.client_removed_signal(client)

2450

3434

client_settings.clear()

2451

3435

2452

3436

atexit.register(cleanup)

2453

2454

for client in tcp_server.clients.itervalues():

3437

3438

for client in tcp_server.clients.values():

2455

3439

if use_dbus:

2456

# Emit D-Bus signal

2457

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3440

# Emit D-Bus signal for adding

3441

mandos_dbus_service.client_added_signal(client)

2458

3442

# Need to initiate checking of clients

2459

3443

if client.enabled:

2460

3444

client.init_checker()

2461

3445

2462

3446

tcp_server.enable()

2463

3447

tcp_server.server_activate()

2464

3448

2465

3449

# Find out what port we got

2466

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

3450

if zeroconf:

3451

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

2467

3452

if use_ipv6:

2468

3453

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

2469

" flowinfo %d, scope_id %d"

2470

% tcp_server.socket.getsockname())

3454

" flowinfo %d, scope_id %d",

3455

*tcp_server.socket.getsockname())

2471

3456

else: # IPv4

2472

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

2473

% tcp_server.socket.getsockname())

2474

2475

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

2476

3457

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

3458

*tcp_server.socket.getsockname())

3459

3460

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

3461

2477

3462

try:

2478

# From the Avahi example code

2479

try:

2480

service.activate()

2481

except dbus.exceptions.DBusException as error:

2482

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

2483

cleanup()

2484

sys.exit(1)

2485

# End of Avahi example code

2486

2487

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

2488

lambda *args, **kwargs:

2489

(tcp_server.handle_request

2490

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

2491

3463

if zeroconf:

3464

# From the Avahi example code

3465

try:

3466

service.activate()

3467

except dbus.exceptions.DBusException as error:

3468

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

3469

cleanup()

3470

sys.exit(1)

3471

# End of Avahi example code

3472

3473

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

3474

lambda *args, **kwargs:

3475

(tcp_server.handle_request

3476

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

3477

2492

3478

logger.debug("Starting main loop")

2493

3479

main_loop.run()

2494

3480

except AvahiError as error:

2495

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

3481

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

2496

3482

cleanup()

2497

3483

sys.exit(1)

2498

3484

except KeyboardInterrupt:

2503

3489

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

2504

3490

cleanup()

2505

3491

3492

2506

3493

if __name__ == '__main__':

2507

3494

main()