/mandos/release : revision 237.7.174

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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 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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#

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

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#

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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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# 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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try:

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from future_builtins import *

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except ImportError:

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pass

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from future_builtins import *

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import SocketServer as socketserver

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import socket

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import argparse

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import datetime

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import errno

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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 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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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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from gi.repository import GLib

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import gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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# 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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# 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 = "1.8.4"

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SO_BINDTODEVICE = None

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version = "1.6.1"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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

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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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'--home', 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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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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with tempfile.NamedTemporaryFile(dir=self.tempdir

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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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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258

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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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

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= data)

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class avahi(object):

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

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

285

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

287

DBUS_PATH_SERVER = "/"

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@staticmethod

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def string_array_to_txt_array(t):

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

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

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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215

class AvahiError(Exception):

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

305

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self.value = value

306

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

307

**kwargs)

308

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

219

def __unicode__(self):

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return unicode(repr(self.value))

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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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.

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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def __init__(self,

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interface=avahi.IF_UNSPEC,

341

name=None,

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servicetype=None,

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port=None,

344

TXT=None,

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domain="",

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host="",

347

max_renames=32768,

348

protocol=avahi.PROTO_UNSPEC,

349

bus=None):

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

251

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

252

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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255

self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self, remove=True):

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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

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273

" after %i retries, exiting.",

370

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self.rename_count)

371

275

raise AvahiServiceError("Too many renames")

372

self.name = str(

373

self.server.GetAlternativeServiceName(self.name))

374

self.rename_count += 1

276

self.name = unicode(self.server

277

.GetAlternativeServiceName(self.name))

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278

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

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279

self.name)

377

if remove:

378

self.remove()

280

self.remove()

379

281

try:

380

282

self.add()

381

283

except dbus.exceptions.DBusException as error:

382

if (error.get_dbus_name()

383

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

384

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

385

return self.rename(remove=False)

386

else:

387

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

388

self.cleanup()

389

os._exit(1)

390

284

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

285

self.cleanup()

286

os._exit(1)

287

self.rename_count += 1

288

391

289

def remove(self):

392

290

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

393

291

if self.entry_group_state_changed_match is not None:

395

293

self.entry_group_state_changed_match = None

396

294

if self.group is not None:

397

295

self.group.Reset()

398

296

399

297

def add(self):

400

298

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

401

299

self.remove()

418

316

dbus.UInt16(self.port),

419

317

avahi.string_array_to_txt_array(self.TXT))

420

318

self.group.Commit()

421

319

422

320

def entry_group_state_changed(self, state, error):

423

321

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

424

322

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

425

323

426

324

if state == avahi.ENTRY_GROUP_ESTABLISHED:

427

325

logger.debug("Zeroconf service established.")

428

326

elif state == avahi.ENTRY_GROUP_COLLISION:

430

328

self.rename()

431

329

elif state == avahi.ENTRY_GROUP_FAILURE:

432

330

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

433

str(error))

434

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

435

331

unicode(error))

332

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

333

.format(error))

334

436

335

def cleanup(self):

437

336

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

438

337

if self.group is not None:

443

342

pass

444

343

self.group = None

445

344

self.remove()

446

345

447

346

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

448

347

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

449

348

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

450

bad_states = {

451

avahi.SERVER_INVALID: "Zeroconf server invalid",

452

avahi.SERVER_REGISTERING: None,

453

avahi.SERVER_COLLISION: "Zeroconf server name collision",

454

avahi.SERVER_FAILURE: "Zeroconf server failure",

455

}

349

bad_states = { avahi.SERVER_INVALID:

350

"Zeroconf server invalid",

351

avahi.SERVER_REGISTERING: None,

352

avahi.SERVER_COLLISION:

353

"Zeroconf server name collision",

354

avahi.SERVER_FAILURE:

355

"Zeroconf server failure" }

456

356

if state in bad_states:

457

357

if bad_states[state] is not None:

458

358

if error is None:

461

361

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

462

362

self.cleanup()

463

363

elif state == avahi.SERVER_RUNNING:

464

try:

465

self.add()

466

except dbus.exceptions.DBusException as error:

467

if (error.get_dbus_name()

468

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

469

logger.info("Local Zeroconf service name"

470

" collision.")

471

return self.rename(remove=False)

472

else:

473

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

474

self.cleanup()

475

os._exit(1)

364

self.add()

476

365

else:

477

366

if error is None:

478

367

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

479

368

else:

480

369

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

481

370

482

371

def activate(self):

483

372

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

484

373

if self.server is None:

488

377

follow_name_owner_changes=True),

489

378

avahi.DBUS_INTERFACE_SERVER)

490

379

self.server.connect_to_signal("StateChanged",

491

self.server_state_changed)

380

self.server_state_changed)

492

381

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

493

382

494

383

495

384

class AvahiServiceToSyslog(AvahiService):

496

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

385

def rename(self):

497

386

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

498

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

499

syslogger.setFormatter(logging.Formatter(

500

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

501

.format(self.name)))

387

ret = AvahiService.rename(self)

388

syslogger.setFormatter(logging.Formatter

389

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

390

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

391

.format(self.name)))

502

392

return ret

503

393

504

394

505

# Pretend that we have a GnuTLS module

506

class gnutls(object):

507

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

508

509

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

510

if library is None:

511

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

512

_library = ctypes.cdll.LoadLibrary(library)

513

del library

514

515

# Unless otherwise indicated, the constants and types below are

516

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

517

518

# Constants

519

E_SUCCESS = 0

520

E_INTERRUPTED = -52

521

E_AGAIN = -28

522

CRT_OPENPGP = 2

523

CRT_RAWPK = 3

524

CLIENT = 2

525

SHUT_RDWR = 0

526

CRD_CERTIFICATE = 1

527

E_NO_CERTIFICATE_FOUND = -49

528

X509_FMT_DER = 0

529

NO_TICKETS = 1<<10

530

ENABLE_RAWPK = 1<<18

531

CTYPE_PEERS = 3

532

KEYID_USE_SHA256 = 1 # gnutls/x509.h

533

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

534

535

# Types

536

class session_int(ctypes.Structure):

537

_fields_ = []

538

session_t = ctypes.POINTER(session_int)

539

540

class certificate_credentials_st(ctypes.Structure):

541

_fields_ = []

542

certificate_credentials_t = ctypes.POINTER(

543

certificate_credentials_st)

544

certificate_type_t = ctypes.c_int

545

546

class datum_t(ctypes.Structure):

547

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

548

('size', ctypes.c_uint)]

549

550

class openpgp_crt_int(ctypes.Structure):

551

_fields_ = []

552

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

553

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

554

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

555

credentials_type_t = ctypes.c_int

556

transport_ptr_t = ctypes.c_void_p

557

close_request_t = ctypes.c_int

558

559

# Exceptions

560

class Error(Exception):

561

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

562

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

563

# code is passed, convert it to a string with

564

# gnutls.strerror()

565

self.code = code

566

if message is None and code is not None:

567

message = gnutls.strerror(code)

568

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

569

message, *args)

570

571

class CertificateSecurityError(Error):

572

pass

573

574

# Classes

575

class Credentials(object):

576

def __init__(self):

577

self._c_object = gnutls.certificate_credentials_t()

578

gnutls.certificate_allocate_credentials(

579

ctypes.byref(self._c_object))

580

self.type = gnutls.CRD_CERTIFICATE

581

582

def __del__(self):

583

gnutls.certificate_free_credentials(self._c_object)

584

585

class ClientSession(object):

586

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

587

self._c_object = gnutls.session_t()

588

gnutls_flags = gnutls.CLIENT

589

if gnutls.check_version("3.5.6"):

590

gnutls_flags |= gnutls.NO_TICKETS

591

if gnutls.has_rawpk:

592

gnutls_flags |= gnutls.ENABLE_RAWPK

593

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

594

del gnutls_flags

595

gnutls.set_default_priority(self._c_object)

596

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

597

gnutls.handshake_set_private_extensions(self._c_object,

598

True)

599

self.socket = socket

600

if credentials is None:

601

credentials = gnutls.Credentials()

602

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

603

ctypes.cast(credentials._c_object,

604

ctypes.c_void_p))

605

self.credentials = credentials

606

607

def __del__(self):

608

gnutls.deinit(self._c_object)

609

610

def handshake(self):

611

return gnutls.handshake(self._c_object)

612

613

def send(self, data):

614

data = bytes(data)

615

data_len = len(data)

616

while data_len > 0:

617

data_len -= gnutls.record_send(self._c_object,

618

data[-data_len:],

619

data_len)

620

621

def bye(self):

622

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

623

624

# Error handling functions

625

def _error_code(result):

626

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

627

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

628

if result >= 0:

629

return result

630

if result == gnutls.E_NO_CERTIFICATE_FOUND:

631

raise gnutls.CertificateSecurityError(code=result)

632

raise gnutls.Error(code=result)

633

634

def _retry_on_error(result, func, arguments):

635

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

636

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

637

while result < 0:

638

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

639

return _error_code(result)

640

result = func(*arguments)

641

return result

642

643

# Unless otherwise indicated, the function declarations below are

644

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

645

646

# Functions

647

priority_set_direct = _library.gnutls_priority_set_direct

648

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

649

ctypes.POINTER(ctypes.c_char_p)]

650

priority_set_direct.restype = _error_code

651

652

init = _library.gnutls_init

653

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

654

init.restype = _error_code

655

656

set_default_priority = _library.gnutls_set_default_priority

657

set_default_priority.argtypes = [session_t]

658

set_default_priority.restype = _error_code

659

660

record_send = _library.gnutls_record_send

661

record_send.argtypes = [session_t, ctypes.c_void_p,

662

ctypes.c_size_t]

663

record_send.restype = ctypes.c_ssize_t

664

record_send.errcheck = _retry_on_error

665

666

certificate_allocate_credentials = (

667

_library.gnutls_certificate_allocate_credentials)

668

certificate_allocate_credentials.argtypes = [

669

ctypes.POINTER(certificate_credentials_t)]

670

certificate_allocate_credentials.restype = _error_code

671

672

certificate_free_credentials = (

673

_library.gnutls_certificate_free_credentials)

674

certificate_free_credentials.argtypes = [

675

certificate_credentials_t]

676

certificate_free_credentials.restype = None

677

678

handshake_set_private_extensions = (

679

_library.gnutls_handshake_set_private_extensions)

680

handshake_set_private_extensions.argtypes = [session_t,

681

ctypes.c_int]

682

handshake_set_private_extensions.restype = None

683

684

credentials_set = _library.gnutls_credentials_set

685

credentials_set.argtypes = [session_t, credentials_type_t,

686

ctypes.c_void_p]

687

credentials_set.restype = _error_code

688

689

strerror = _library.gnutls_strerror

690

strerror.argtypes = [ctypes.c_int]

691

strerror.restype = ctypes.c_char_p

692

693

certificate_type_get = _library.gnutls_certificate_type_get

694

certificate_type_get.argtypes = [session_t]

695

certificate_type_get.restype = _error_code

696

697

certificate_get_peers = _library.gnutls_certificate_get_peers

698

certificate_get_peers.argtypes = [session_t,

699

ctypes.POINTER(ctypes.c_uint)]

700

certificate_get_peers.restype = ctypes.POINTER(datum_t)

701

702

global_set_log_level = _library.gnutls_global_set_log_level

703

global_set_log_level.argtypes = [ctypes.c_int]

704

global_set_log_level.restype = None

705

706

global_set_log_function = _library.gnutls_global_set_log_function

707

global_set_log_function.argtypes = [log_func]

708

global_set_log_function.restype = None

709

710

deinit = _library.gnutls_deinit

711

deinit.argtypes = [session_t]

712

deinit.restype = None

713

714

handshake = _library.gnutls_handshake

715

handshake.argtypes = [session_t]

716

handshake.restype = _error_code

717

handshake.errcheck = _retry_on_error

718

719

transport_set_ptr = _library.gnutls_transport_set_ptr

720

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

721

transport_set_ptr.restype = None

722

723

bye = _library.gnutls_bye

724

bye.argtypes = [session_t, close_request_t]

725

bye.restype = _error_code

726

bye.errcheck = _retry_on_error

727

728

check_version = _library.gnutls_check_version

729

check_version.argtypes = [ctypes.c_char_p]

730

check_version.restype = ctypes.c_char_p

731

732

_need_version = b"3.3.0"

733

if check_version(_need_version) is None:

734

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

735

.format(_need_version))

736

737

_tls_rawpk_version = b"3.6.6"

738

has_rawpk = bool(check_version(_tls_rawpk_version))

739

740

if has_rawpk:

741

# Types

742

class pubkey_st(ctypes.Structure):

743

_fields = []

744

pubkey_t = ctypes.POINTER(pubkey_st)

745

746

x509_crt_fmt_t = ctypes.c_int

747

748

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

749

pubkey_init = _library.gnutls_pubkey_init

750

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

751

pubkey_init.restype = _error_code

752

753

pubkey_import = _library.gnutls_pubkey_import

754

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

755

x509_crt_fmt_t]

756

pubkey_import.restype = _error_code

757

758

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

759

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

760

ctypes.POINTER(ctypes.c_ubyte),

761

ctypes.POINTER(ctypes.c_size_t)]

762

pubkey_get_key_id.restype = _error_code

763

764

pubkey_deinit = _library.gnutls_pubkey_deinit

765

pubkey_deinit.argtypes = [pubkey_t]

766

pubkey_deinit.restype = None

767

else:

768

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

769

770

openpgp_crt_init = _library.gnutls_openpgp_crt_init

771

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

772

openpgp_crt_init.restype = _error_code

773

774

openpgp_crt_import = _library.gnutls_openpgp_crt_import

775

openpgp_crt_import.argtypes = [openpgp_crt_t,

776

ctypes.POINTER(datum_t),

777

openpgp_crt_fmt_t]

778

openpgp_crt_import.restype = _error_code

779

780

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

781

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

782

ctypes.POINTER(ctypes.c_uint)]

783

openpgp_crt_verify_self.restype = _error_code

784

785

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

786

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

787

openpgp_crt_deinit.restype = None

788

789

openpgp_crt_get_fingerprint = (

790

_library.gnutls_openpgp_crt_get_fingerprint)

791

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

792

ctypes.c_void_p,

793

ctypes.POINTER(

794

ctypes.c_size_t)]

795

openpgp_crt_get_fingerprint.restype = _error_code

796

797

if check_version("3.6.4"):

798

certificate_type_get2 = _library.gnutls_certificate_type_get2

799

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

800

certificate_type_get2.restype = _error_code

801

802

# Remove non-public functions

803

del _error_code, _retry_on_error

804

805

806

def call_pipe(connection, # : multiprocessing.Connection

807

func, *args, **kwargs):

808

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

809

810

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

811

return value on the provided multiprocessing.Connection.

812

"""

813

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

814

connection.close()

395

def timedelta_to_milliseconds(td):

396

"Convert a datetime.timedelta() to milliseconds"

397

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

398

+ (td.seconds * 1000)

399

+ (td.microseconds // 1000))

815

400

816

401

817

402

class Client(object):

818

403

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

819

404

820

405

Attributes:

821

406

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

822

407

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

824

409

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

825

410

to see if the client lives.

826

411

'None' if no process is running.

827

checker_callback_tag: a GLib event source tag, or None

412

checker_callback_tag: a gobject event source tag, or None

828

413

checker_command: string; External command which is run to check

829

414

if client lives. %() expansions are done at

830

415

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

831

416

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

832

checker_initiator_tag: a GLib event source tag, or None

417

checker_initiator_tag: a gobject event source tag, or None

833

418

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

834

419

client_structure: Object describing what attributes a client has

835

420

and is used for storing the client at exit

836

421

current_checker_command: string; current running checker_command

837

disable_initiator_tag: a GLib event source tag, or None

422

disable_initiator_tag: a gobject event source tag, or None

838

423

enabled: bool()

839

424

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

840

uniquely identify an OpenPGP client

841

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

842

a client using raw public keys

425

uniquely identify the client

843

426

host: string; available for use by the checker command

844

427

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

845

428

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

847

430

last_checker_status: integer between 0 and 255 reflecting exit

848

431

status of last checker. -1 reflects crashed

849

432

checker, -2 means no checker completed yet.

850

last_checker_signal: The signal which killed the last checker, if

851

last_checker_status is -1

852

433

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

853

434

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

854

435

D-Bus identifiers

861

442

disabled, or None

862

443

server_settings: The server_settings dict from main()

863

444

"""

864

445

865

446

runtime_expansions = ("approval_delay", "approval_duration",

866

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

447

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

867

448

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

868

449

"last_approval_request", "last_checked_ok",

869

450

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

870

client_defaults = {

871

"timeout": "PT5M",

872

"extended_timeout": "PT15M",

873

"interval": "PT2M",

874

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

875

"host": "",

876

"approval_delay": "PT0S",

877

"approval_duration": "PT1S",

878

"approved_by_default": "True",

879

"enabled": "True",

880

}

881

451

client_defaults = { "timeout": "PT5M",

452

"extended_timeout": "PT15M",

453

"interval": "PT2M",

454

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

455

"host": "",

456

"approval_delay": "PT0S",

457

"approval_duration": "PT1S",

458

"approved_by_default": "True",

459

"enabled": "True",

460

}

461

462

def timeout_milliseconds(self):

463

"Return the 'timeout' attribute in milliseconds"

464

return timedelta_to_milliseconds(self.timeout)

465

466

def extended_timeout_milliseconds(self):

467

"Return the 'extended_timeout' attribute in milliseconds"

468

return timedelta_to_milliseconds(self.extended_timeout)

469

470

def interval_milliseconds(self):

471

"Return the 'interval' attribute in milliseconds"

472

return timedelta_to_milliseconds(self.interval)

473

474

def approval_delay_milliseconds(self):

475

return timedelta_to_milliseconds(self.approval_delay)

476

882

477

@staticmethod

883

478

def config_parser(config):

884

479

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

891

486

for client_name in config.sections():

892

487

section = dict(config.items(client_name))

893

488

client = settings[client_name] = {}

894

489

895

490

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

896

491

# Reformat values from string types to Python types

897

492

client["approved_by_default"] = config.getboolean(

898

493

client_name, "approved_by_default")

899

494

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

900

495

"enabled")

901

902

# Uppercase and remove spaces from key_id and fingerprint

903

# for later comparison purposes with return value from the

904

# key_id() and fingerprint() functions

905

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

906

.replace(" ", ""))

496

907

497

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

908

498

.replace(" ", ""))

909

499

if "secret" in section:

910

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

911

.encode("utf-8"),

912

"base64")

500

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

913

501

elif "secfile" in section:

914

502

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

915

503

(section["secfile"])),

916

504

"rb") as secfile:

917

505

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

918

506

else:

919

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

507

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

920

508

.format(section))

921

509

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

922

510

client["extended_timeout"] = string_to_delta(

930

518

client["last_approval_request"] = None

931

519

client["last_checked_ok"] = None

932

520

client["last_checker_status"] = -2

933

521

934

522

return settings

935

936

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

523

524

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

937

525

self.name = name

938

526

if server_settings is None:

939

527

server_settings = {}

940

528

self.server_settings = server_settings

941

529

# adding all client settings

942

for setting, value in settings.items():

530

for setting, value in settings.iteritems():

943

531

setattr(self, setting, value)

944

532

945

533

if self.enabled:

946

534

if not hasattr(self, "last_enabled"):

947

535

self.last_enabled = datetime.datetime.utcnow()

951

539

else:

952

540

self.last_enabled = None

953

541

self.expires = None

954

542

955

543

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

956

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

544

# Uppercase and remove spaces from fingerprint for later

545

# comparison purposes with return value from the fingerprint()

546

# function

957

547

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

958

548

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

959

549

datetime.datetime.utcnow())

960

550

961

551

# attributes specific for this server instance

962

552

self.checker = None

963

553

self.checker_initiator_tag = None

966

556

self.current_checker_command = None

967

557

self.approved = None

968

558

self.approvals_pending = 0

969

self.changedstate = multiprocessing_manager.Condition(

970

multiprocessing_manager.Lock())

971

self.client_structure = [attr

972

for attr in self.__dict__.keys()

559

self.changedstate = (multiprocessing_manager

560

.Condition(multiprocessing_manager

561

.Lock()))

562

self.client_structure = [attr for attr in

563

self.__dict__.iterkeys()

973

564

if not attr.startswith("_")]

974

565

self.client_structure.append("client_structure")

975

976

for name, t in inspect.getmembers(

977

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

566

567

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

568

lambda obj:

569

isinstance(obj,

570

property)):

978

571

if not name.startswith("_"):

979

572

self.client_structure.append(name)

980

573

981

574

# Send notice to process children that client state has changed

982

575

def send_changedstate(self):

983

576

with self.changedstate:

984

577

self.changedstate.notify_all()

985

578

986

579

def enable(self):

987

580

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

988

581

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

993

586

self.last_enabled = datetime.datetime.utcnow()

994

587

self.init_checker()

995

588

self.send_changedstate()

996

589

997

590

def disable(self, quiet=True):

998

591

"""Disable this client."""

999

592

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

1001

594

if not quiet:

1002

595

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

1003

596

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

1004

GLib.source_remove(self.disable_initiator_tag)

597

gobject.source_remove(self.disable_initiator_tag)

1005

598

self.disable_initiator_tag = None

1006

599

self.expires = None

1007

600

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

1008

GLib.source_remove(self.checker_initiator_tag)

601

gobject.source_remove(self.checker_initiator_tag)

1009

602

self.checker_initiator_tag = None

1010

603

self.stop_checker()

1011

604

self.enabled = False

1012

605

if not quiet:

1013

606

self.send_changedstate()

1014

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

607

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

1015

608

return False

1016

609

1017

610

def __del__(self):

1018

611

self.disable()

1019

612

1020

613

def init_checker(self):

1021

614

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

1022

615

# and every interval from then on.

1023

616

if self.checker_initiator_tag is not None:

1024

GLib.source_remove(self.checker_initiator_tag)

1025

self.checker_initiator_tag = GLib.timeout_add(

1026

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

1027

self.start_checker)

617

gobject.source_remove(self.checker_initiator_tag)

618

self.checker_initiator_tag = (gobject.timeout_add

619

(self.interval_milliseconds(),

620

self.start_checker))

1028

621

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

1029

622

if self.disable_initiator_tag is not None:

1030

GLib.source_remove(self.disable_initiator_tag)

1031

self.disable_initiator_tag = GLib.timeout_add(

1032

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

623

gobject.source_remove(self.disable_initiator_tag)

624

self.disable_initiator_tag = (gobject.timeout_add

625

(self.timeout_milliseconds(),

626

self.disable))

1033

627

# Also start a new checker *right now*.

1034

628

self.start_checker()

1035

1036

def checker_callback(self, source, condition, connection,

1037

command):

629

630

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

1038

631

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

1039

632

self.checker_callback_tag = None

1040

633

self.checker = None

1041

# Read return code from connection (see call_pipe)

1042

returncode = connection.recv()

1043

connection.close()

1044

1045

if returncode >= 0:

1046

self.last_checker_status = returncode

1047

self.last_checker_signal = None

634

if os.WIFEXITED(condition):

635

self.last_checker_status = os.WEXITSTATUS(condition)

1048

636

if self.last_checker_status == 0:

1049

637

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

1050

638

vars(self))

1051

639

self.checked_ok()

1052

640

else:

1053

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

641

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

642

vars(self))

1054

643

else:

1055

644

self.last_checker_status = -1

1056

self.last_checker_signal = -returncode

1057

645

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

1058

646

vars(self))

1059

return False

1060

647

1061

648

def checked_ok(self):

1062

649

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

1063

650

self.last_checked_ok = datetime.datetime.utcnow()

1064

651

self.last_checker_status = 0

1065

self.last_checker_signal = None

1066

652

self.bump_timeout()

1067

653

1068

654

def bump_timeout(self, timeout=None):

1069

655

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

1070

656

if timeout is None:

1071

657

timeout = self.timeout

1072

658

if self.disable_initiator_tag is not None:

1073

GLib.source_remove(self.disable_initiator_tag)

659

gobject.source_remove(self.disable_initiator_tag)

1074

660

self.disable_initiator_tag = None

1075

661

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

1076

self.disable_initiator_tag = GLib.timeout_add(

1077

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

662

self.disable_initiator_tag = (gobject.timeout_add

663

(timedelta_to_milliseconds

664

(timeout), self.disable))

1078

665

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

1079

666

1080

667

def need_approval(self):

1081

668

self.last_approval_request = datetime.datetime.utcnow()

1082

669

1083

670

def start_checker(self):

1084

671

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

1085

672

1086

673

If a checker already exists, leave it running and do

1087

674

nothing."""

1088

675

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

1093

680

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

1094

681

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

1095

682

# should be.

1096

1097

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

1098

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

1099

self.checker.join()

1100

self.checker = None

683

684

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

685

try:

686

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

687

except (AttributeError, OSError) as error:

688

if (isinstance(error, OSError)

689

and error.errno != errno.ECHILD):

690

raise error

691

else:

692

if pid:

693

logger.warning("Checker was a zombie")

694

gobject.source_remove(self.checker_callback_tag)

695

self.checker_callback(pid, status,

696

self.current_checker_command)

1101

697

# Start a new checker if needed

1102

698

if self.checker is None:

1103

699

# Escape attributes for the shell

1104

escaped_attrs = {

1105

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

1106

for attr in self.runtime_expansions}

700

escaped_attrs = dict(

701

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

702

for attr in

703

self.runtime_expansions)

1107

704

try:

1108

705

command = self.checker_command % escaped_attrs

1109

706

except TypeError as error:

1110

707

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

1111

self.checker_command,

708

self.checker_command, exc_info=error)

709

return True # Try again later

710

self.current_checker_command = command

711

try:

712

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

713

command, self.name)

714

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

715

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

716

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

717

# always replaced by /dev/null.)

718

# The exception is when not debugging but nevertheless

719

# running in the foreground; use the previously

720

# created wnull.

721

popen_args = {}

722

if (not self.server_settings["debug"]

723

and self.server_settings["foreground"]):

724

popen_args.update({"stdout": wnull,

725

"stderr": wnull })

726

self.checker = subprocess.Popen(command,

727

close_fds=True,

728

shell=True, cwd="/",

729

**popen_args)

730

except OSError as error:

731

logger.error("Failed to start subprocess",

1112

732

exc_info=error)

1113

return True # Try again later

1114

self.current_checker_command = command

1115

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

1116

self.name)

1117

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

1118

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

1119

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

1120

# always replaced by /dev/null.)

1121

# The exception is when not debugging but nevertheless

1122

# running in the foreground; use the previously

1123

# created wnull.

1124

popen_args = {"close_fds": True,

1125

"shell": True,

1126

"cwd": "/"}

1127

if (not self.server_settings["debug"]

1128

and self.server_settings["foreground"]):

1129

popen_args.update({"stdout": wnull,

1130

"stderr": wnull})

1131

pipe = multiprocessing.Pipe(duplex=False)

1132

self.checker = multiprocessing.Process(

1133

target=call_pipe,

1134

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

1135

kwargs=popen_args)

1136

self.checker.start()

1137

self.checker_callback_tag = GLib.io_add_watch(

1138

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

1139

self.checker_callback, pipe[0], command)

1140

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

733

return True

734

self.checker_callback_tag = (gobject.child_watch_add

735

(self.checker.pid,

736

self.checker_callback,

737

data=command))

738

# The checker may have completed before the gobject

739

# watch was added. Check for this.

740

try:

741

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

742

except OSError as error:

743

if error.errno == errno.ECHILD:

744

# This should never happen

745

logger.error("Child process vanished",

746

exc_info=error)

747

return True

748

raise

749

if pid:

750

gobject.source_remove(self.checker_callback_tag)

751

self.checker_callback(pid, status, command)

752

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

1141

753

return True

1142

754

1143

755

def stop_checker(self):

1144

756

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

1145

757

if self.checker_callback_tag:

1146

GLib.source_remove(self.checker_callback_tag)

758

gobject.source_remove(self.checker_callback_tag)

1147

759

self.checker_callback_tag = None

1148

760

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

1149

761

return

1150

762

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

1151

self.checker.terminate()

763

try:

764

self.checker.terminate()

765

#time.sleep(0.5)

766

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

767

# self.checker.kill()

768

except OSError as error:

769

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

770

raise

1152

771

self.checker = None

1153

772

1154

773

1155

def dbus_service_property(dbus_interface,

1156

signature="v",

1157

access="readwrite",

1158

byte_arrays=False):

774

def dbus_service_property(dbus_interface, signature="v",

775

access="readwrite", byte_arrays=False):

1159

776

"""Decorators for marking methods of a DBusObjectWithProperties to

1160

777

become properties on the D-Bus.

1161

778

1162

779

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

1163

780

and with one argument by "Set".

1164

781

1165

782

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

1166

783

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

1167

784

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

1170

787

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

1171

788

if byte_arrays and signature != "ay":

1172

789

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

1173

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

1174

790

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

1175

791

def decorator(func):

1176

792

func._dbus_is_property = True

1177

793

func._dbus_interface = dbus_interface

1180

796

func._dbus_name = func.__name__

1181

797

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

1182

798

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

1183

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

799

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1184

800

return func

1185

1186

801

return decorator

1187

802

1188

803

1189

804

def dbus_interface_annotations(dbus_interface):

1190

805

"""Decorator for marking functions returning interface annotations

1191

806

1192

807

Usage:

1193

808

1194

809

@dbus_interface_annotations("org.example.Interface")

1195

810

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

1196

811

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

1197

812

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

1198

813

"false"}

1199

814

"""

1200

1201

815

def decorator(func):

1202

816

func._dbus_is_interface = True

1203

817

func._dbus_interface = dbus_interface

1204

818

func._dbus_name = dbus_interface

1205

819

return func

1206

1207

820

return decorator

1208

821

1209

822

1210

823

def dbus_annotations(annotations):

1211

824

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

1212

825

Usage:

1213

1214

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

1215

"org.freedesktop.DBus.Property."

1216

"EmitsChangedSignal": "false"})

826

1217

827

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

1218

828

access="r")

829

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

830

"org.freedesktop.DBus.Property."

831

"EmitsChangedSignal": "false"})

1219

832

def Property_dbus_property(self):

1220

833

return dbus.Boolean(False)

1221

1222

See also the DBusObjectWithAnnotations class.

1223

834

"""

1224

1225

835

def decorator(func):

1226

836

func._dbus_annotations = annotations

1227

837

return func

1228

1229

838

return decorator

1230

839

1231

840

1232

841

class DBusPropertyException(dbus.exceptions.DBusException):

1233

842

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

1234

843

"""

1235

pass

844

def __unicode__(self):

845

return unicode(str(self))

1236

846

1237

847

1238

848

class DBusPropertyAccessException(DBusPropertyException):

1247

857

pass

1248

858

1249

859

1250

class DBusObjectWithAnnotations(dbus.service.Object):

1251

"""A D-Bus object with annotations.

1252

1253

Classes inheriting from this can use the dbus_annotations

1254

decorator to add annotations to methods or signals.

860

class DBusObjectWithProperties(dbus.service.Object):

861

"""A D-Bus object with properties.

862

863

Classes inheriting from this can use the dbus_service_property

864

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

865

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

1255

866

"""

1256

867

1257

868

@staticmethod

1258

869

def _is_dbus_thing(thing):

1259

870

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

1260

871

1261

872

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

1262

873

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

1263

874

"""

1264

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

875

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

1265

876

False)

1266

877

1267

878

def _get_all_dbus_things(self, thing):

1268

879

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

1269

880

"""

1270

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

881

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

882

name),

1271

883

athing.__get__(self))

1272

884

for cls in self.__class__.__mro__

1273

885

for name, athing in

1274

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

1275

1276

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1277

out_signature="s",

1278

path_keyword='object_path',

1279

connection_keyword='connection')

1280

def Introspect(self, object_path, connection):

1281

"""Overloading of standard D-Bus method.

1282

1283

Inserts annotation tags on methods and signals.

1284

"""

1285

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

1286

connection)

1287

try:

1288

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

1289

1290

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

1291

# Add annotation tags

1292

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

1293

for tag in if_tag.getElementsByTagName(typ):

1294

annots = dict()

1295

for name, prop in (self.

1296

_get_all_dbus_things(typ)):

1297

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

1298

and prop._dbus_interface

1299

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

1300

annots.update(getattr(

1301

prop, "_dbus_annotations", {}))

1302

for name, value in annots.items():

1303

ann_tag = document.createElement(

1304

"annotation")

1305

ann_tag.setAttribute("name", name)

1306

ann_tag.setAttribute("value", value)

1307

tag.appendChild(ann_tag)

1308

# Add interface annotation tags

1309

for annotation, value in dict(

1310

itertools.chain.from_iterable(

1311

annotations().items()

1312

for name, annotations

1313

in self._get_all_dbus_things("interface")

1314

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

1315

)).items():

1316

ann_tag = document.createElement("annotation")

1317

ann_tag.setAttribute("name", annotation)

1318

ann_tag.setAttribute("value", value)

1319

if_tag.appendChild(ann_tag)

1320

# Fix argument name for the Introspect method itself

1321

if (if_tag.getAttribute("name")

1322

== dbus.INTROSPECTABLE_IFACE):

1323

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

1324

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

1325

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

1326

if (arg.getAttribute("direction")

1327

== "out"):

1328

arg.setAttribute("name",

1329

"xml_data")

1330

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

1331

document.unlink()

1332

except (AttributeError, xml.dom.DOMException,

1333

xml.parsers.expat.ExpatError) as error:

1334

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

1335

exc_info=error)

1336

return xmlstring

1337

1338

1339

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1340

"""A D-Bus object with properties.

1341

1342

Classes inheriting from this can use the dbus_service_property

1343

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

1344

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

1345

"""

1346

886

inspect.getmembers(cls,

887

self._is_dbus_thing(thing)))

888

1347

889

def _get_dbus_property(self, interface_name, property_name):

1348

890

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

1349

891

property with the specified name and interface.

1350

892

"""

1351

for cls in self.__class__.__mro__:

1352

for name, value in inspect.getmembers(

1353

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

893

for cls in self.__class__.__mro__:

894

for name, value in (inspect.getmembers

895

(cls,

896

self._is_dbus_thing("property"))):

1354

897

if (value._dbus_name == property_name

1355

898

and value._dbus_interface == interface_name):

1356

899

return value.__get__(self)

1357

900

1358

901

# No such property

1359

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

1360

self.dbus_object_path, interface_name, property_name))

1361

1362

@classmethod

1363

def _get_all_interface_names(cls):

1364

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

1365

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

1366

"_dbus_interface", None)

1367

for x in (inspect.getmro(cls))

1368

for attr in dir(x))

1369

if name is not None)

1370

1371

@dbus.service.method(dbus.PROPERTIES_IFACE,

1372

in_signature="ss",

902

raise DBusPropertyNotFound(self.dbus_object_path + ":"

903

+ interface_name + "."

904

+ property_name)

905

906

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

1373

907

out_signature="v")

1374

908

def Get(self, interface_name, property_name):

1375

909

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

1381

915

if not hasattr(value, "variant_level"):

1382

916

return value

1383

917

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

1384

918

1385

919

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

1386

920

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

1387

921

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

1393

927

# The byte_arrays option is not supported yet on

1394

928

# signatures other than "ay".

1395

929

if prop._dbus_signature != "ay":

1396

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

1397

"'ay' signature {!r}"

1398

.format(prop._dbus_signature))

930

raise ValueError

1399

931

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

1400

932

for byte in value))

1401

933

prop(value)

1402

1403

@dbus.service.method(dbus.PROPERTIES_IFACE,

1404

in_signature="s",

934

935

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

1405

936

out_signature="a{sv}")

1406

937

def GetAll(self, interface_name):

1407

938

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

1408

939

standard.

1409

940

1410

941

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

1411

942

"""

1412

943

properties = {}

1422

953

if not hasattr(value, "variant_level"):

1423

954

properties[name] = value

1424

955

continue

1425

properties[name] = type(value)(

1426

value, variant_level=value.variant_level + 1)

956

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

957

value.variant_level+1)

1427

958

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

1428

1429

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

1430

def PropertiesChanged(self, interface_name, changed_properties,

1431

invalidated_properties):

1432

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

1433

standard.

1434

"""

1435

pass

1436

959

1437

960

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1438

961

out_signature="s",

1439

962

path_keyword='object_path',

1440

963

connection_keyword='connection')

1441

964

def Introspect(self, object_path, connection):

1442

965

"""Overloading of standard D-Bus method.

1443

966

1444

967

Inserts property tags and interface annotation tags.

1445

968

"""

1446

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1447

object_path,

1448

connection)

969

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

970

connection)

1449

971

try:

1450

972

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

1451

1452

973

def make_tag(document, name, prop):

1453

974

e = document.createElement("property")

1454

975

e.setAttribute("name", name)

1455

976

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

1456

977

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

1457

978

return e

1458

1459

979

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

1460

980

# Add property tags

1461

981

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

1464

984

if prop._dbus_interface

1465

985

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

1466

986

if_tag.appendChild(tag)

1467

# Add annotation tags for properties

1468

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

1469

annots = dict()

1470

for name, prop in self._get_all_dbus_things(

1471

"property"):

1472

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

1473

and prop._dbus_interface

1474

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

1475

annots.update(getattr(

1476

prop, "_dbus_annotations", {}))

1477

for name, value in annots.items():

1478

ann_tag = document.createElement(

1479

"annotation")

1480

ann_tag.setAttribute("name", name)

1481

ann_tag.setAttribute("value", value)

1482

tag.appendChild(ann_tag)

987

# Add annotation tags

988

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

989

for tag in if_tag.getElementsByTagName(typ):

990

annots = dict()

991

for name, prop in (self.

992

_get_all_dbus_things(typ)):

993

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

994

and prop._dbus_interface

995

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

996

annots.update(getattr

997

(prop,

998

"_dbus_annotations",

999

{}))

1000

for name, value in annots.iteritems():

1001

ann_tag = document.createElement(

1002

"annotation")

1003

ann_tag.setAttribute("name", name)

1004

ann_tag.setAttribute("value", value)

1005

tag.appendChild(ann_tag)

1006

# Add interface annotation tags

1007

for annotation, value in dict(

1008

itertools.chain.from_iterable(

1009

annotations().iteritems()

1010

for name, annotations in

1011

self._get_all_dbus_things("interface")

1012

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

1013

)).iteritems():

1014

ann_tag = document.createElement("annotation")

1015

ann_tag.setAttribute("name", annotation)

1016

ann_tag.setAttribute("value", value)

1017

if_tag.appendChild(ann_tag)

1483

1018

# Add the names to the return values for the

1484

1019

# "org.freedesktop.DBus.Properties" methods

1485

1020

if (if_tag.getAttribute("name")

1504

1039

return xmlstring

1505

1040

1506

1041

1507

try:

1508

dbus.OBJECT_MANAGER_IFACE

1509

except AttributeError:

1510

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

1511

1512

1513

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1514

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

1515

1516

Classes inheriting from this exposes the standard

1517

GetManagedObjects call and the InterfacesAdded and

1518

InterfacesRemoved signals on the standard

1519

"org.freedesktop.DBus.ObjectManager" interface.

1520

1521

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

1522

manually.

1523

"""

1524

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1525

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

1526

def GetManagedObjects(self):

1527

"""This function must be overridden"""

1528

raise NotImplementedError()

1529

1530

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1531

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

1532

def InterfacesAdded(self, object_path, interfaces_and_properties):

1533

pass

1534

1535

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

1536

def InterfacesRemoved(self, object_path, interfaces):

1537

pass

1538

1539

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1540

out_signature="s",

1541

path_keyword='object_path',

1542

connection_keyword='connection')

1543

def Introspect(self, object_path, connection):

1544

"""Overloading of standard D-Bus method.

1545

1546

Override return argument name of GetManagedObjects to be

1547

"objpath_interfaces_and_properties"

1548

"""

1549

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1550

object_path,

1551

connection)

1552

try:

1553

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

1554

1555

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

1556

# Fix argument name for the GetManagedObjects method

1557

if (if_tag.getAttribute("name")

1558

== dbus.OBJECT_MANAGER_IFACE):

1559

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

1560

if (cn.getAttribute("name")

1561

== "GetManagedObjects"):

1562

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

1563

if (arg.getAttribute("direction")

1564

== "out"):

1565

arg.setAttribute(

1566

"name",

1567

"objpath_interfaces"

1568

"_and_properties")

1569

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

1570

document.unlink()

1571

except (AttributeError, xml.dom.DOMException,

1572

xml.parsers.expat.ExpatError) as error:

1573

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

1574

exc_info=error)

1575

return xmlstring

1576

1577

1578

1042

def datetime_to_dbus(dt, variant_level=0):

1579

1043

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

1580

1044

if dt is None:

1581

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

1582

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

1045

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

1046

return dbus.String(dt.isoformat(),

1047

variant_level=variant_level)

1583

1048

1584

1049

1585

1050

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1587

1052

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

1588

1053

interface names according to the "alt_interface_names" mapping.

1589

1054

Usage:

1590

1055

1591

1056

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

1592

1057

"net.example.AlternateInterface"})

1593

1058

class SampleDBusObject(dbus.service.Object):

1594

1059

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

1595

1060

def SampleDBusMethod():

1596

1061

pass

1597

1062

1598

1063

The above "SampleDBusMethod" on "SampleDBusObject" will be

1599

1064

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

1600

1065

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

1601

1066

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

1602

1067

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

1603

1068

1604

1069

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

1605

1070

(from DBusObjectWithProperties) and interfaces (from the

1606

1071

dbus_interface_annotations decorator).

1607

1072

"""

1608

1609

1073

def wrapper(cls):

1610

1074

for orig_interface_name, alt_interface_name in (

1611

alt_interface_names.items()):

1075

alt_interface_names.iteritems()):

1612

1076

attr = {}

1613

1077

interface_names = set()

1614

1078

# Go though all attributes of the class

1616

1080

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

1617

1081

# with the wrong interface name

1618

1082

if (not hasattr(attribute, "_dbus_interface")

1619

or not attribute._dbus_interface.startswith(

1620

orig_interface_name)):

1083

or not attribute._dbus_interface

1084

.startswith(orig_interface_name)):

1621

1085

continue

1622

1086

# Create an alternate D-Bus interface name based on

1623

1087

# the current name

1624

alt_interface = attribute._dbus_interface.replace(

1625

orig_interface_name, alt_interface_name)

1088

alt_interface = (attribute._dbus_interface

1089

.replace(orig_interface_name,

1090

alt_interface_name))

1626

1091

interface_names.add(alt_interface)

1627

1092

# Is this a D-Bus signal?

1628

1093

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

1629

1094

# Extract the original non-method undecorated

1630

1095

# function by black magic

1631

if sys.version_info.major == 2:

1632

nonmethod_func = (dict(

1096

nonmethod_func = (dict(

1633

1097

zip(attribute.func_code.co_freevars,

1634

attribute.__closure__))

1635

["func"].cell_contents)

1636

else:

1637

nonmethod_func = (dict(

1638

zip(attribute.__code__.co_freevars,

1639

attribute.__closure__))

1640

["func"].cell_contents)

1098

attribute.__closure__))["func"]

1099

.cell_contents)

1641

1100

# Create a new, but exactly alike, function

1642

1101

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

1643

1102

# with the alternate D-Bus interface name

1644

new_function = copy_function(nonmethod_func)

1645

new_function = (dbus.service.signal(

1646

alt_interface,

1647

attribute._dbus_signature)(new_function))

1103

new_function = (dbus.service.signal

1104

(alt_interface,

1105

attribute._dbus_signature)

1106

(types.FunctionType(

1107

nonmethod_func.func_code,

1108

nonmethod_func.func_globals,

1109

nonmethod_func.func_name,

1110

nonmethod_func.func_defaults,

1111

nonmethod_func.func_closure)))

1648

1112

# Copy annotations, if any

1649

1113

try:

1650

new_function._dbus_annotations = dict(

1651

attribute._dbus_annotations)

1114

new_function._dbus_annotations = (

1115

dict(attribute._dbus_annotations))

1652

1116

except AttributeError:

1653

1117

pass

1654

1655

1118

# Define a creator of a function to call both the

1656

1119

# original and alternate functions, so both the

1657

1120

# original and alternate signals gets sent when

1660

1123

"""This function is a scope container to pass

1661

1124

func1 and func2 to the "call_both" function

1662

1125

outside of its arguments"""

1663

1664

@functools.wraps(func2)

1665

1126

def call_both(*args, **kwargs):

1666

1127

"""This function will emit two D-Bus

1667

1128

signals by calling func1 and func2"""

1668

1129

func1(*args, **kwargs)

1669

1130

func2(*args, **kwargs)

1670

# Make wrapper function look like a D-Bus

1671

# signal

1672

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

1673

if name.startswith("_dbus_"):

1674

setattr(call_both, name, attr)

1675

1676

1131

return call_both

1677

1132

# Create the "call_both" function and add it to

1678

1133

# the class

1683

1138

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

1684

1139

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

1685

1140

# to the class.

1686

attr[attrname] = (

1687

dbus.service.method(

1688

alt_interface,

1689

attribute._dbus_in_signature,

1690

attribute._dbus_out_signature)

1691

(copy_function(attribute)))

1141

attr[attrname] = (dbus.service.method

1142

(alt_interface,

1143

attribute._dbus_in_signature,

1144

attribute._dbus_out_signature)

1145

(types.FunctionType

1146

(attribute.func_code,

1147

attribute.func_globals,

1148

attribute.func_name,

1149

attribute.func_defaults,

1150

attribute.func_closure)))

1692

1151

# Copy annotations, if any

1693

1152

try:

1694

attr[attrname]._dbus_annotations = dict(

1695

attribute._dbus_annotations)

1153

attr[attrname]._dbus_annotations = (

1154

dict(attribute._dbus_annotations))

1696

1155

except AttributeError:

1697

1156

pass

1698

1157

# Is this a D-Bus property?

1701

1160

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

1702

1161

# property with the alternate D-Bus interface

1703

1162

# name. Add it to the class.

1704

attr[attrname] = (dbus_service_property(

1705

alt_interface, attribute._dbus_signature,

1706

attribute._dbus_access,

1707

attribute._dbus_get_args_options

1708

["byte_arrays"])

1709

(copy_function(attribute)))

1163

attr[attrname] = (dbus_service_property

1164

(alt_interface,

1165

attribute._dbus_signature,

1166

attribute._dbus_access,

1167

attribute

1168

._dbus_get_args_options

1169

["byte_arrays"])

1170

(types.FunctionType

1171

(attribute.func_code,

1172

attribute.func_globals,

1173

attribute.func_name,

1174

attribute.func_defaults,

1175

attribute.func_closure)))

1710

1176

# Copy annotations, if any

1711

1177

try:

1712

attr[attrname]._dbus_annotations = dict(

1713

attribute._dbus_annotations)

1178

attr[attrname]._dbus_annotations = (

1179

dict(attribute._dbus_annotations))

1714

1180

except AttributeError:

1715

1181

pass

1716

1182

# Is this a D-Bus interface?

1719

1185

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

1720

1186

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

1721

1187

# to the class.

1722

attr[attrname] = (

1723

dbus_interface_annotations(alt_interface)

1724

(copy_function(attribute)))

1188

attr[attrname] = (dbus_interface_annotations

1189

(alt_interface)

1190

(types.FunctionType

1191

(attribute.func_code,

1192

attribute.func_globals,

1193

attribute.func_name,

1194

attribute.func_defaults,

1195

attribute.func_closure)))

1725

1196

if deprecate:

1726

1197

# Deprecate all alternate interfaces

1727

iname = "_AlternateDBusNames_interface_annotation{}"

1198

iname="_AlternateDBusNames_interface_annotation{0}"

1728

1199

for interface_name in interface_names:

1729

1730

1200

@dbus_interface_annotations(interface_name)

1731

1201

def func(self):

1732

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

1733

"true"}

1202

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

1203

"true" }

1734

1204

# Find an unused name

1735

1205

for aname in (iname.format(i)

1736

1206

for i in itertools.count()):

1740

1210

if interface_names:

1741

1211

# Replace the class with a new subclass of it with

1742

1212

# methods, signals, etc. as created above.

1743

if sys.version_info.major == 2:

1744

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

1745

(cls, ), attr)

1746

else:

1747

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

1748

(cls, ), attr)

1213

cls = type(b"{0}Alternate".format(cls.__name__),

1214

(cls,), attr)

1749

1215

return cls

1750

1751

1216

return wrapper

1752

1217

1753

1218

1754

1219

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

1755

"se.bsnet.fukt.Mandos"})

1220

"se.bsnet.fukt.Mandos"})

1756

1221

class ClientDBus(Client, DBusObjectWithProperties):

1757

1222

"""A Client class using D-Bus

1758

1223

1759

1224

Attributes:

1760

1225

dbus_object_path: dbus.ObjectPath

1761

1226

bus: dbus.SystemBus()

1762

1227

"""

1763

1228

1764

1229

runtime_expansions = (Client.runtime_expansions

1765

+ ("dbus_object_path", ))

1766

1767

_interface = "se.recompile.Mandos.Client"

1768

1230

+ ("dbus_object_path",))

1231

1769

1232

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

1770

1771

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

1233

1234

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

1772

1235

self.bus = bus

1773

1236

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

1774

1237

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

1775

1238

# the D-Bus

1776

client_object_name = str(self.name).translate(

1239

client_object_name = unicode(self.name).translate(

1777

1240

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

1778

1241

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

1779

self.dbus_object_path = dbus.ObjectPath(

1780

"/clients/" + client_object_name)

1242

self.dbus_object_path = (dbus.ObjectPath

1243

("/clients/" + client_object_name))

1781

1244

DBusObjectWithProperties.__init__(self, self.bus,

1782

1245

self.dbus_object_path)

1783

1784

def notifychangeproperty(transform_func, dbus_name,

1785

type_func=lambda x: x,

1786

variant_level=1,

1787

invalidate_only=False,

1788

_interface=_interface):

1246

1247

def notifychangeproperty(transform_func,

1248

dbus_name, type_func=lambda x: x,

1249

variant_level=1):

1789

1250

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

1790

1251

its changes to DBus.

1791

1252

1792

1253

transform_fun: Function that takes a value and a variant_level

1793

1254

and transforms it to a D-Bus type.

1794

1255

dbus_name: D-Bus name of the variable

1796

1257

to the D-Bus. Default: no transform

1797

1258

variant_level: D-Bus variant level. Default: 1

1798

1259

"""

1799

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

1800

1260

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

1801

1261

def setter(self, value):

1802

1262

if hasattr(self, "dbus_object_path"):

1803

1263

if (not hasattr(self, attrname) or

1804

1264

type_func(getattr(self, attrname, None))

1805

1265

!= type_func(value)):

1806

if invalidate_only:

1807

self.PropertiesChanged(

1808

_interface, dbus.Dictionary(),

1809

dbus.Array((dbus_name, )))

1810

else:

1811

dbus_value = transform_func(

1812

type_func(value),

1813

variant_level=variant_level)

1814

self.PropertyChanged(dbus.String(dbus_name),

1815

dbus_value)

1816

self.PropertiesChanged(

1817

_interface,

1818

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

1819

dbus_value}),

1820

dbus.Array())

1266

dbus_value = transform_func(type_func(value),

1267

variant_level

1268

=variant_level)

1269

self.PropertyChanged(dbus.String(dbus_name),

1270

dbus_value)

1821

1271

setattr(self, attrname, value)

1822

1272

1823

1273

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

1824

1274

1825

1275

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1826

1276

approvals_pending = notifychangeproperty(dbus.Boolean,

1827

1277

"ApprovalPending",

1828

type_func=bool)

1278

type_func = bool)

1829

1279

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

1830

1280

last_enabled = notifychangeproperty(datetime_to_dbus,

1831

1281

"LastEnabled")

1832

checker = notifychangeproperty(

1833

dbus.Boolean, "CheckerRunning",

1834

type_func=lambda checker: checker is not None)

1282

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

1283

type_func = lambda checker:

1284

checker is not None)

1835

1285

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1836

1286

"LastCheckedOK")

1837

1287

last_checker_status = notifychangeproperty(dbus.Int16,

1840

1290

datetime_to_dbus, "LastApprovalRequest")

1841

1291

approved_by_default = notifychangeproperty(dbus.Boolean,

1842

1292

"ApprovedByDefault")

1843

approval_delay = notifychangeproperty(

1844

dbus.UInt64, "ApprovalDelay",

1845

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

1293

approval_delay = notifychangeproperty(dbus.UInt64,

1294

"ApprovalDelay",

1295

type_func =

1296

timedelta_to_milliseconds)

1846

1297

approval_duration = notifychangeproperty(

1847

1298

dbus.UInt64, "ApprovalDuration",

1848

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

1299

type_func = timedelta_to_milliseconds)

1849

1300

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

1850

timeout = notifychangeproperty(

1851

dbus.UInt64, "Timeout",

1852

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

1301

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

1302

type_func =

1303

timedelta_to_milliseconds)

1853

1304

extended_timeout = notifychangeproperty(

1854

1305

dbus.UInt64, "ExtendedTimeout",

1855

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

1856

interval = notifychangeproperty(

1857

dbus.UInt64, "Interval",

1858

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

1306

type_func = timedelta_to_milliseconds)

1307

interval = notifychangeproperty(dbus.UInt64,

1308

"Interval",

1309

type_func =

1310

timedelta_to_milliseconds)

1859

1311

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

1860

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

1861

invalidate_only=True)

1862

1312

1863

1313

del notifychangeproperty

1864

1314

1865

1315

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

1866

1316

try:

1867

1317

self.remove_from_connection()

1870

1320

if hasattr(DBusObjectWithProperties, "__del__"):

1871

1321

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

1872

1322

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

1873

1874

def checker_callback(self, source, condition,

1875

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

1876

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

1877

connection, command, *args,

1878

**kwargs)

1879

exitstatus = self.last_checker_status

1880

if exitstatus >= 0:

1323

1324

def checker_callback(self, pid, condition, command,

1325

*args, **kwargs):

1326

self.checker_callback_tag = None

1327

self.checker = None

1328

if os.WIFEXITED(condition):

1329

exitstatus = os.WEXITSTATUS(condition)

1881

1330

# Emit D-Bus signal

1882

1331

self.CheckerCompleted(dbus.Int16(exitstatus),

1883

# This is specific to GNU libC

1884

dbus.Int64(exitstatus << 8),

1332

dbus.Int64(condition),

1885

1333

dbus.String(command))

1886

1334

else:

1887

1335

# Emit D-Bus signal

1888

1336

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

1889

dbus.Int64(

1890

# This is specific to GNU libC

1891

(exitstatus << 8)

1892

| self.last_checker_signal),

1337

dbus.Int64(condition),

1893

1338

dbus.String(command))

1894

return ret

1895

1339

1340

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

1341

*args, **kwargs)

1342

1896

1343

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

1897

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

1344

old_checker = self.checker

1345

if self.checker is not None:

1346

old_checker_pid = self.checker.pid

1347

else:

1348

old_checker_pid = None

1898

1349

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

1899

1350

# Only if new checker process was started

1900

1351

if (self.checker is not None

1902

1353

# Emit D-Bus signal

1903

1354

self.CheckerStarted(self.current_checker_command)

1904

1355

return r

1905

1356

1906

1357

def _reset_approved(self):

1907

1358

self.approved = None

1908

1359

return False

1909

1360

1910

1361

def approve(self, value=True):

1911

1362

self.approved = value

1912

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

1913

* 1000), self._reset_approved)

1363

gobject.timeout_add(timedelta_to_milliseconds

1364

(self.approval_duration),

1365

self._reset_approved)

1914

1366

self.send_changedstate()

1915

1916

# D-Bus methods, signals & properties

1917

1918

# Interfaces

1919

1920

# Signals

1921

1367

1368

## D-Bus methods, signals & properties

1369

_interface = "se.recompile.Mandos.Client"

1370

1371

## Interfaces

1372

1373

@dbus_interface_annotations(_interface)

1374

def _foo(self):

1375

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

1376

"false"}

1377

1378

## Signals

1379

1922

1380

# CheckerCompleted - signal

1923

1381

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

1924

1382

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

1925

1383

"D-Bus signal"

1926

1384

pass

1927

1385

1928

1386

# CheckerStarted - signal

1929

1387

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

1930

1388

def CheckerStarted(self, command):

1931

1389

"D-Bus signal"

1932

1390

pass

1933

1391

1934

1392

# PropertyChanged - signal

1935

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

1936

1393

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

1937

1394

def PropertyChanged(self, property, value):

1938

1395

"D-Bus signal"

1939

1396

pass

1940

1397

1941

1398

# GotSecret - signal

1942

1399

@dbus.service.signal(_interface)

1943

1400

def GotSecret(self):

1946

1403

server to mandos-client

1947

1404

"""

1948

1405

pass

1949

1406

1950

1407

# Rejected - signal

1951

1408

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

1952

1409

def Rejected(self, reason):

1953

1410

"D-Bus signal"

1954

1411

pass

1955

1412

1956

1413

# NeedApproval - signal

1957

1414

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

1958

1415

def NeedApproval(self, timeout, default):

1959

1416

"D-Bus signal"

1960

1417

return self.need_approval()

1961

1962

# Methods

1963

1418

1419

## Methods

1420

1964

1421

# Approve - method

1965

1422

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

1966

1423

def Approve(self, value):

1967

1424

self.approve(value)

1968

1425

1969

1426

# CheckedOK - method

1970

1427

@dbus.service.method(_interface)

1971

1428

def CheckedOK(self):

1972

1429

self.checked_ok()

1973

1430

1974

1431

# Enable - method

1975

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

1976

1432

@dbus.service.method(_interface)

1977

1433

def Enable(self):

1978

1434

"D-Bus method"

1979

1435

self.enable()

1980

1436

1981

1437

# StartChecker - method

1982

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

1983

1438

@dbus.service.method(_interface)

1984

1439

def StartChecker(self):

1985

1440

"D-Bus method"

1986

1441

self.start_checker()

1987

1442

1988

1443

# Disable - method

1989

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

1990

1444

@dbus.service.method(_interface)

1991

1445

def Disable(self):

1992

1446

"D-Bus method"

1993

1447

self.disable()

1994

1448

1995

1449

# StopChecker - method

1996

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

1997

1450

@dbus.service.method(_interface)

1998

1451

def StopChecker(self):

1999

1452

self.stop_checker()

2000

2001

# Properties

2002

1453

1454

## Properties

1455

2003

1456

# ApprovalPending - property

2004

1457

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

2005

1458

def ApprovalPending_dbus_property(self):

2006

1459

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

2007

1460

2008

1461

# ApprovedByDefault - property

2009

@dbus_service_property(_interface,

2010

signature="b",

1462

@dbus_service_property(_interface, signature="b",

2011

1463

access="readwrite")

2012

1464

def ApprovedByDefault_dbus_property(self, value=None):

2013

1465

if value is None: # get

2014

1466

return dbus.Boolean(self.approved_by_default)

2015

1467

self.approved_by_default = bool(value)

2016

1468

2017

1469

# ApprovalDelay - property

2018

@dbus_service_property(_interface,

2019

signature="t",

1470

@dbus_service_property(_interface, signature="t",

2020

1471

access="readwrite")

2021

1472

def ApprovalDelay_dbus_property(self, value=None):

2022

1473

if value is None: # get

2023

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

2024

* 1000)

1474

return dbus.UInt64(self.approval_delay_milliseconds())

2025

1475

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

2026

1476

2027

1477

# ApprovalDuration - property

2028

@dbus_service_property(_interface,

2029

signature="t",

1478

@dbus_service_property(_interface, signature="t",

2030

1479

access="readwrite")

2031

1480

def ApprovalDuration_dbus_property(self, value=None):

2032

1481

if value is None: # get

2033

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

2034

* 1000)

1482

return dbus.UInt64(timedelta_to_milliseconds(

1483

self.approval_duration))

2035

1484

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

2036

1485

2037

1486

# Name - property

2038

@dbus_annotations(

2039

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

2040

1487

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

2041

1488

def Name_dbus_property(self):

2042

1489

return dbus.String(self.name)

2043

2044

# KeyID - property

2045

@dbus_annotations(

2046

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

2047

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

2048

def KeyID_dbus_property(self):

2049

return dbus.String(self.key_id)

2050

1490

2051

1491

# Fingerprint - property

2052

@dbus_annotations(

2053

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

2054

1492

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

2055

1493

def Fingerprint_dbus_property(self):

2056

1494

return dbus.String(self.fingerprint)

2057

1495

2058

1496

# Host - property

2059

@dbus_service_property(_interface,

2060

signature="s",

1497

@dbus_service_property(_interface, signature="s",

2061

1498

access="readwrite")

2062

1499

def Host_dbus_property(self, value=None):

2063

1500

if value is None: # get

2064

1501

return dbus.String(self.host)

2065

self.host = str(value)

2066

1502

self.host = unicode(value)

1503

2067

1504

# Created - property

2068

@dbus_annotations(

2069

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

2070

1505

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

2071

1506

def Created_dbus_property(self):

2072

1507

return datetime_to_dbus(self.created)

2073

1508

2074

1509

# LastEnabled - property

2075

1510

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

2076

1511

def LastEnabled_dbus_property(self):

2077

1512

return datetime_to_dbus(self.last_enabled)

2078

1513

2079

1514

# Enabled - property

2080

@dbus_service_property(_interface,

2081

signature="b",

1515

@dbus_service_property(_interface, signature="b",

2082

1516

access="readwrite")

2083

1517

def Enabled_dbus_property(self, value=None):

2084

1518

if value is None: # get

2087

1521

self.enable()

2088

1522

else:

2089

1523

self.disable()

2090

1524

2091

1525

# LastCheckedOK - property

2092

@dbus_service_property(_interface,

2093

signature="s",

1526

@dbus_service_property(_interface, signature="s",

2094

1527

access="readwrite")

2095

1528

def LastCheckedOK_dbus_property(self, value=None):

2096

1529

if value is not None:

2097

1530

self.checked_ok()

2098

1531

return

2099

1532

return datetime_to_dbus(self.last_checked_ok)

2100

1533

2101

1534

# LastCheckerStatus - property

2102

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

1535

@dbus_service_property(_interface, signature="n",

1536

access="read")

2103

1537

def LastCheckerStatus_dbus_property(self):

2104

1538

return dbus.Int16(self.last_checker_status)

2105

1539

2106

1540

# Expires - property

2107

1541

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

2108

1542

def Expires_dbus_property(self):

2109

1543

return datetime_to_dbus(self.expires)

2110

1544

2111

1545

# LastApprovalRequest - property

2112

1546

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

2113

1547

def LastApprovalRequest_dbus_property(self):

2114

1548

return datetime_to_dbus(self.last_approval_request)

2115

1549

2116

1550

# Timeout - property

2117

@dbus_service_property(_interface,

2118

signature="t",

1551

@dbus_service_property(_interface, signature="t",

2119

1552

access="readwrite")

2120

1553

def Timeout_dbus_property(self, value=None):

2121

1554

if value is None: # get

2122

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

1555

return dbus.UInt64(self.timeout_milliseconds())

2123

1556

old_timeout = self.timeout

2124

1557

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

2125

1558

# Reschedule disabling

2133

1566

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

2134

1567

is None):

2135

1568

return

2136

GLib.source_remove(self.disable_initiator_tag)

2137

self.disable_initiator_tag = GLib.timeout_add(

2138

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

2139

self.disable)

2140

1569

gobject.source_remove(self.disable_initiator_tag)

1570

self.disable_initiator_tag = (

1571

gobject.timeout_add(

1572

timedelta_to_milliseconds(self.expires - now),

1573

self.disable))

1574

2141

1575

# ExtendedTimeout - property

2142

@dbus_service_property(_interface,

2143

signature="t",

1576

@dbus_service_property(_interface, signature="t",

2144

1577

access="readwrite")

2145

1578

def ExtendedTimeout_dbus_property(self, value=None):

2146

1579

if value is None: # get

2147

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

2148

* 1000)

1580

return dbus.UInt64(self.extended_timeout_milliseconds())

2149

1581

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

2150

1582

2151

1583

# Interval - property

2152

@dbus_service_property(_interface,

2153

signature="t",

1584

@dbus_service_property(_interface, signature="t",

2154

1585

access="readwrite")

2155

1586

def Interval_dbus_property(self, value=None):

2156

1587

if value is None: # get

2157

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

1588

return dbus.UInt64(self.interval_milliseconds())

2158

1589

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

2159

1590

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

2160

1591

return

2161

1592

if self.enabled:

2162

1593

# Reschedule checker run

2163

GLib.source_remove(self.checker_initiator_tag)

2164

self.checker_initiator_tag = GLib.timeout_add(

2165

value, self.start_checker)

2166

self.start_checker() # Start one now, too

2167

1594

gobject.source_remove(self.checker_initiator_tag)

1595

self.checker_initiator_tag = (gobject.timeout_add

1596

(value, self.start_checker))

1597

self.start_checker() # Start one now, too

1598

2168

1599

# Checker - property

2169

@dbus_service_property(_interface,

2170

signature="s",

1600

@dbus_service_property(_interface, signature="s",

2171

1601

access="readwrite")

2172

1602

def Checker_dbus_property(self, value=None):

2173

1603

if value is None: # get

2174

1604

return dbus.String(self.checker_command)

2175

self.checker_command = str(value)

2176

1605

self.checker_command = unicode(value)

1606

2177

1607

# CheckerRunning - property

2178

@dbus_service_property(_interface,

2179

signature="b",

1608

@dbus_service_property(_interface, signature="b",

2180

1609

access="readwrite")

2181

1610

def CheckerRunning_dbus_property(self, value=None):

2182

1611

if value is None: # get

2185

1614

self.start_checker()

2186

1615

else:

2187

1616

self.stop_checker()

2188

1617

2189

1618

# ObjectPath - property

2190

@dbus_annotations(

2191

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

2192

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

2193

1619

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

2194

1620

def ObjectPath_dbus_property(self):

2195

return self.dbus_object_path # is already a dbus.ObjectPath

2196

1621

return self.dbus_object_path # is already a dbus.ObjectPath

1622

2197

1623

# Secret = property

2198

@dbus_annotations(

2199

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

2200

"invalidates"})

2201

@dbus_service_property(_interface,

2202

signature="ay",

2203

access="write",

2204

byte_arrays=True)

1624

@dbus_service_property(_interface, signature="ay",

1625

access="write", byte_arrays=True)

2205

1626

def Secret_dbus_property(self, value):

2206

self.secret = bytes(value)

2207

1627

self.secret = str(value)

1628

2208

1629

del _interface

2209

1630

2210

1631

2211

1632

class ProxyClient(object):

2212

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

1633

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

2213

1634

self._pipe = child_pipe

2214

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

1635

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

2215

1636

if not self._pipe.recv():

2216

raise KeyError(key_id or fpr)

2217

1637

raise KeyError()

1638

2218

1639

def __getattribute__(self, name):

2219

1640

if name == '_pipe':

2220

1641

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

2223

1644

if data[0] == 'data':

2224

1645

return data[1]

2225

1646

if data[0] == 'function':

2226

2227

1647

def func(*args, **kwargs):

2228

1648

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

2229

1649

return self._pipe.recv()[1]

2230

2231

1650

return func

2232

1651

2233

1652

def __setattr__(self, name, value):

2234

1653

if name == '_pipe':

2235

1654

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

2238

1657

2239

1658

class ClientHandler(socketserver.BaseRequestHandler, object):

2240

1659

"""A class to handle client connections.

2241

1660

2242

1661

Instantiated once for each connection to handle it.

2243

1662

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

2244

1663

2245

1664

def handle(self):

2246

1665

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

2247

1666

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

2248

str(self.client_address))

1667

unicode(self.client_address))

2249

1668

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

2250

1669

self.server.child_pipe.fileno())

2251

2252

session = gnutls.ClientSession(self.request)

2253

2254

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

2255

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

2256

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

2257

# "+DHE-DSS"))

1670

1671

session = (gnutls.connection

1672

.ClientSession(self.request,

1673

gnutls.connection

1674

.X509Credentials()))

1675

1676

# Note: gnutls.connection.X509Credentials is really a

1677

# generic GnuTLS certificate credentials object so long as

1678

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

1679

# here despite using OpenPGP certificates.

1680

1681

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

1682

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

1683

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

1684

# "+DHE-DSS"))

2258

1685

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

2259

1686

priority = self.server.gnutls_priority

2260

1687

if priority is None:

2261

1688

priority = "NORMAL"

2262

gnutls.priority_set_direct(session._c_object,

2263

priority.encode("utf-8"),

2264

None)

2265

1689

(gnutls.library.functions

1690

.gnutls_priority_set_direct(session._c_object,

1691

priority, None))

1692

2266

1693

# Start communication using the Mandos protocol

2267

1694

# Get protocol number

2268

1695

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

2269

1696

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

2270

1697

try:

2271

1698

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

2272

raise RuntimeError(line)

1699

raise RuntimeError

2273

1700

except (ValueError, IndexError, RuntimeError) as error:

2274

1701

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

2275

1702

return

2276

1703

2277

1704

# Start GnuTLS connection

2278

1705

try:

2279

1706

session.handshake()

2280

except gnutls.Error as error:

1707

except gnutls.errors.GNUTLSError as error:

2281

1708

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

2282

1709

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

2283

1710

# established. Just abandon the request.

2284

1711

return

2285

1712

logger.debug("Handshake succeeded")

2286

1713

2287

1714

approval_required = False

2288

1715

try:

2289

if gnutls.has_rawpk:

2290

fpr = ""

2291

try:

2292

key_id = self.key_id(

2293

self.peer_certificate(session))

2294

except (TypeError, gnutls.Error) as error:

2295

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

2296

return

2297

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

2298

2299

else:

2300

key_id = ""

2301

try:

2302

fpr = self.fingerprint(

2303

self.peer_certificate(session))

2304

except (TypeError, gnutls.Error) as error:

2305

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

2306

return

2307

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

2308

2309

try:

2310

client = ProxyClient(child_pipe, key_id, fpr,

1716

try:

1717

fpr = self.fingerprint(self.peer_certificate

1718

(session))

1719

except (TypeError,

1720

gnutls.errors.GNUTLSError) as error:

1721

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

1722

return

1723

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

1724

1725

try:

1726

client = ProxyClient(child_pipe, fpr,

2311

1727

self.client_address)

2312

1728

except KeyError:

2313

1729

return

2314

1730

2315

1731

if client.approval_delay:

2316

1732

delay = client.approval_delay

2317

1733

client.approvals_pending += 1

2318

1734

approval_required = True

2319

1735

2320

1736

while True:

2321

1737

if not client.enabled:

2322

1738

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

2323

client.name)

1739

client.name)

2324

1740

if self.server.use_dbus:

2325

1741

# Emit D-Bus signal

2326

1742

client.Rejected("Disabled")

2327

1743

return

2328

1744

2329

1745

if client.approved or not client.approval_delay:

2330

# We are approved or approval is disabled

1746

#We are approved or approval is disabled

2331

1747

break

2332

1748

elif client.approved is None:

2333

1749

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

2335

1751

if self.server.use_dbus:

2336

1752

# Emit D-Bus signal

2337

1753

client.NeedApproval(

2338

client.approval_delay.total_seconds()

2339

* 1000, client.approved_by_default)

1754

client.approval_delay_milliseconds(),

1755

client.approved_by_default)

2340

1756

else:

2341

1757

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

2342

1758

client.name)

2344

1760

# Emit D-Bus signal

2345

1761

client.Rejected("Denied")

2346

1762

return

2347

2348

# wait until timeout or approved

1763

1764

#wait until timeout or approved

2349

1765

time = datetime.datetime.now()

2350

1766

client.changedstate.acquire()

2351

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

1767

client.changedstate.wait(

1768

float(timedelta_to_milliseconds(delay)

1769

/ 1000))

2352

1770

client.changedstate.release()

2353

1771

time2 = datetime.datetime.now()

2354

1772

if (time2 - time) >= delay:

2364

1782

break

2365

1783

else:

2366

1784

delay -= time2 - time

2367

2368

try:

2369

session.send(client.secret)

2370

except gnutls.Error as error:

2371

logger.warning("gnutls send failed",

2372

exc_info=error)

2373

return

2374

1785

1786

sent_size = 0

1787

while sent_size < len(client.secret):

1788

try:

1789

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

1790

except gnutls.errors.GNUTLSError as error:

1791

logger.warning("gnutls send failed",

1792

exc_info=error)

1793

return

1794

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

1795

sent, len(client.secret)

1796

- (sent_size + sent))

1797

sent_size += sent

1798

2375

1799

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

2376

1800

# bump the timeout using extended_timeout

2377

1801

client.bump_timeout(client.extended_timeout)

2378

1802

if self.server.use_dbus:

2379

1803

# Emit D-Bus signal

2380

1804

client.GotSecret()

2381

1805

2382

1806

finally:

2383

1807

if approval_required:

2384

1808

client.approvals_pending -= 1

2385

1809

try:

2386

1810

session.bye()

2387

except gnutls.Error as error:

1811

except gnutls.errors.GNUTLSError as error:

2388

1812

logger.warning("GnuTLS bye failed",

2389

1813

exc_info=error)

2390

1814

2391

1815

@staticmethod

2392

1816

def peer_certificate(session):

2393

"Return the peer's certificate as a bytestring"

2394

try:

2395

cert_type = gnutls.certificate_type_get2(session._c_object,

2396

gnutls.CTYPE_PEERS)

2397

except AttributeError:

2398

cert_type = gnutls.certificate_type_get(session._c_object)

2399

if gnutls.has_rawpk:

2400

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2401

else:

2402

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2403

# If not a valid certificate type...

2404

if cert_type not in valid_cert_types:

2405

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

2406

valid_cert_types)

2407

# ...return invalid data

2408

return b""

1817

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

1818

# If not an OpenPGP certificate...

1819

if (gnutls.library.functions

1820

.gnutls_certificate_type_get(session._c_object)

1821

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1822

# ...do the normal thing

1823

return session.peer_certificate

2409

1824

list_size = ctypes.c_uint(1)

2410

cert_list = (gnutls.certificate_get_peers

1825

cert_list = (gnutls.library.functions

1826

.gnutls_certificate_get_peers

2411

1827

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

2412

1828

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

2413

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

1829

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

1830

" certificate")

2414

1831

if list_size.value == 0:

2415

1832

return None

2416

1833

cert = cert_list[0]

2417

1834

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

2418

2419

@staticmethod

2420

def key_id(certificate):

2421

"Convert a certificate bytestring to a hexdigit key ID"

2422

# New GnuTLS "datum" with the public key

2423

datum = gnutls.datum_t(

2424

ctypes.cast(ctypes.c_char_p(certificate),

2425

ctypes.POINTER(ctypes.c_ubyte)),

2426

ctypes.c_uint(len(certificate)))

2427

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

2428

# New empty GnuTLS certificate

2429

pubkey = gnutls.pubkey_t()

2430

gnutls.pubkey_init(ctypes.byref(pubkey))

2431

# Import the raw public key into the certificate

2432

gnutls.pubkey_import(pubkey,

2433

ctypes.byref(datum),

2434

gnutls.X509_FMT_DER)

2435

# New buffer for the key ID

2436

buf = ctypes.create_string_buffer(32)

2437

buf_len = ctypes.c_size_t(len(buf))

2438

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

2439

gnutls.pubkey_get_key_id(pubkey,

2440

gnutls.KEYID_USE_SHA256,

2441

ctypes.cast(ctypes.byref(buf),

2442

ctypes.POINTER(ctypes.c_ubyte)),

2443

ctypes.byref(buf_len))

2444

# Deinit the certificate

2445

gnutls.pubkey_deinit(pubkey)

2446

2447

# Convert the buffer to a Python bytestring

2448

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

2449

# Convert the bytestring to hexadecimal notation

2450

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

2451

return hex_key_id

2452

1835

2453

1836

@staticmethod

2454

1837

def fingerprint(openpgp):

2455

1838

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2456

1839

# New GnuTLS "datum" with the OpenPGP public key

2457

datum = gnutls.datum_t(

2458

ctypes.cast(ctypes.c_char_p(openpgp),

2459

ctypes.POINTER(ctypes.c_ubyte)),

2460

ctypes.c_uint(len(openpgp)))

1840

datum = (gnutls.library.types

1841

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

1842

ctypes.POINTER

1843

(ctypes.c_ubyte)),

1844

ctypes.c_uint(len(openpgp))))

2461

1845

# New empty GnuTLS certificate

2462

crt = gnutls.openpgp_crt_t()

2463

gnutls.openpgp_crt_init(ctypes.byref(crt))

1846

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1847

(gnutls.library.functions

1848

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2464

1849

# Import the OpenPGP public key into the certificate

2465

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

2466

gnutls.OPENPGP_FMT_RAW)

1850

(gnutls.library.functions

1851

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

1852

gnutls.library.constants

1853

.GNUTLS_OPENPGP_FMT_RAW))

2467

1854

# Verify the self signature in the key

2468

1855

crtverify = ctypes.c_uint()

2469

gnutls.openpgp_crt_verify_self(crt, 0,

2470

ctypes.byref(crtverify))

1856

(gnutls.library.functions

1857

.gnutls_openpgp_crt_verify_self(crt, 0,

1858

ctypes.byref(crtverify)))

2471

1859

if crtverify.value != 0:

2472

gnutls.openpgp_crt_deinit(crt)

2473

raise gnutls.CertificateSecurityError(code

2474

=crtverify.value)

1860

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1861

raise (gnutls.errors.CertificateSecurityError

1862

("Verify failed"))

2475

1863

# New buffer for the fingerprint

2476

1864

buf = ctypes.create_string_buffer(20)

2477

1865

buf_len = ctypes.c_size_t()

2478

1866

# Get the fingerprint from the certificate into the buffer

2479

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

2480

ctypes.byref(buf_len))

1867

(gnutls.library.functions

1868

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

1869

ctypes.byref(buf_len)))

2481

1870

# Deinit the certificate

2482

gnutls.openpgp_crt_deinit(crt)

1871

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2483

1872

# Convert the buffer to a Python bytestring

2484

1873

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

2485

1874

# Convert the bytestring to hexadecimal notation

2489

1878

2490

1879

class MultiprocessingMixIn(object):

2491

1880

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

2492

2493

1881

def sub_process_main(self, request, address):

2494

1882

try:

2495

1883

self.finish_request(request, address)

2496

1884

except Exception:

2497

1885

self.handle_error(request, address)

2498

1886

self.close_request(request)

2499

1887

2500

1888

def process_request(self, request, address):

2501

1889

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

2502

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

2503

args=(request, address))

1890

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

1891

args = (request, address))

2504

1892

proc.start()

2505

1893

return proc

2506

1894

2507

1895

2508

1896

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2509

1897

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

2510

2511

1898

def process_request(self, request, client_address):

2512

1899

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

2513

1900

2514

1901

This function creates a new pipe in self.pipe

2515

1902

"""

2516

1903

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2517

1904

2518

1905

proc = MultiprocessingMixIn.process_request(self, request,

2519

1906

client_address)

2520

1907

self.child_pipe.close()

2521

1908

self.add_pipe(parent_pipe, proc)

2522

1909

2523

1910

def add_pipe(self, parent_pipe, proc):

2524

1911

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

2525

raise NotImplementedError()

1912

raise NotImplementedError

2526

1913

2527

1914

2528

1915

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2529

1916

socketserver.TCPServer, object):

2530

1917

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

2531

1918

2532

1919

Attributes:

2533

1920

enabled: Boolean; whether this server is activated yet

2534

1921

interface: None or a network interface name (string)

2535

1922

use_ipv6: Boolean; to use IPv6 or not

2536

1923

"""

2537

2538

1924

def __init__(self, server_address, RequestHandlerClass,

2539

interface=None,

2540

use_ipv6=True,

2541

socketfd=None):

1925

interface=None, use_ipv6=True, socketfd=None):

2542

1926

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

2543

1927

creating a new one with socket.socket().

2544

1928

"""

2550

1934

self.socketfd = socketfd

2551

1935

# Save the original socket.socket() function

2552

1936

self.socket_socket = socket.socket

2553

2554

1937

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

2555

#

1938

#

2556

1939

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

2557

1940

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

2558

1941

# patching socket.socket.)

2559

#

1942

#

2560

1943

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

2561

1944

@functools.wraps(socket.socket)

2562

1945

def socket_wrapper(*args, **kwargs):

2574

1957

# socket_wrapper(), if socketfd was set.

2575

1958

socketserver.TCPServer.__init__(self, server_address,

2576

1959

RequestHandlerClass)

2577

1960

2578

1961

def server_bind(self):

2579

1962

"""This overrides the normal server_bind() function

2580

1963

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

2581

1964

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

2582

global SO_BINDTODEVICE

2583

1965

if self.interface is not None:

2584

1966

if SO_BINDTODEVICE is None:

2585

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

2586

# common enough.

2587

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

2588

SO_BINDTODEVICE = 25

2589

try:

2590

self.socket.setsockopt(

2591

socket.SOL_SOCKET, SO_BINDTODEVICE,

2592

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

2593

except socket.error as error:

2594

if error.errno == errno.EPERM:

2595

logger.error("No permission to bind to"

2596

" interface %s", self.interface)

2597

elif error.errno == errno.ENOPROTOOPT:

2598

logger.error("SO_BINDTODEVICE not available;"

2599

" cannot bind to interface %s",

2600

self.interface)

2601

elif error.errno == errno.ENODEV:

2602

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

2603

" cannot bind", self.interface)

2604

else:

2605

raise

1967

logger.error("SO_BINDTODEVICE does not exist;"

1968

" cannot bind to interface %s",

1969

self.interface)

1970

else:

1971

try:

1972

self.socket.setsockopt(socket.SOL_SOCKET,

1973

SO_BINDTODEVICE,

1974

str(self.interface + '\0'))

1975

except socket.error as error:

1976

if error.errno == errno.EPERM:

1977

logger.error("No permission to bind to"

1978

" interface %s", self.interface)

1979

elif error.errno == errno.ENOPROTOOPT:

1980

logger.error("SO_BINDTODEVICE not available;"

1981

" cannot bind to interface %s",

1982

self.interface)

1983

elif error.errno == errno.ENODEV:

1984

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

1985

" cannot bind", self.interface)

1986

else:

1987

raise

2606

1988

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

2607

1989

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

2608

if self.server_address[1]:

2609

self.allow_reuse_address = True

2610

1990

if not self.server_address[0]:

2611

1991

if self.address_family == socket.AF_INET6:

2612

any_address = "::" # in6addr_any

1992

any_address = "::" # in6addr_any

2613

1993

else:

2614

any_address = "0.0.0.0" # INADDR_ANY

1994

any_address = "0.0.0.0" # INADDR_ANY

2615

1995

self.server_address = (any_address,

2616

1996

self.server_address[1])

2617

1997

elif not self.server_address[1]:

2618

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

1998

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

1999

0)

2619

2000

# if self.interface:

2620

2001

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

2621

2002

# 0, # port

2627

2008

2628

2009

class MandosServer(IPv6_TCPServer):

2629

2010

"""Mandos server.

2630

2011

2631

2012

Attributes:

2632

2013

clients: set of Client objects

2633

2014

gnutls_priority GnuTLS priority string

2634

2015

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

2635

2636

Assumes a GLib.MainLoop event loop.

2016

2017

Assumes a gobject.MainLoop event loop.

2637

2018

"""

2638

2639

2019

def __init__(self, server_address, RequestHandlerClass,

2640

interface=None,

2641

use_ipv6=True,

2642

clients=None,

2643

gnutls_priority=None,

2644

use_dbus=True,

2645

socketfd=None):

2020

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

2021

gnutls_priority=None, use_dbus=True, socketfd=None):

2646

2022

self.enabled = False

2647

2023

self.clients = clients

2648

2024

if self.clients is None:

2651

2027

self.gnutls_priority = gnutls_priority

2652

2028

IPv6_TCPServer.__init__(self, server_address,

2653

2029

RequestHandlerClass,

2654

interface=interface,

2655

use_ipv6=use_ipv6,

2656

socketfd=socketfd)

2657

2030

interface = interface,

2031

use_ipv6 = use_ipv6,

2032

socketfd = socketfd)

2658

2033

def server_activate(self):

2659

2034

if self.enabled:

2660

2035

return socketserver.TCPServer.server_activate(self)

2661

2036

2662

2037

def enable(self):

2663

2038

self.enabled = True

2664

2039

2665

2040

def add_pipe(self, parent_pipe, proc):

2666

2041

# Call "handle_ipc" for both data and EOF events

2667

GLib.io_add_watch(

2668

parent_pipe.fileno(),

2669

GLib.IO_IN | GLib.IO_HUP,

2670

functools.partial(self.handle_ipc,

2671

parent_pipe=parent_pipe,

2672

proc=proc))

2673

2674

def handle_ipc(self, source, condition,

2675

parent_pipe=None,

2676

proc=None,

2677

client_object=None):

2042

gobject.io_add_watch(parent_pipe.fileno(),

2043

gobject.IO_IN | gobject.IO_HUP,

2044

functools.partial(self.handle_ipc,

2045

parent_pipe =

2046

parent_pipe,

2047

proc = proc))

2048

2049

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

2050

proc = None, client_object=None):

2678

2051

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

2679

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

2052

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

2680

2053

# Wait for other process to exit

2681

2054

proc.join()

2682

2055

return False

2683

2056

2684

2057

# Read a request from the child

2685

2058

request = parent_pipe.recv()

2686

2059

command = request[0]

2687

2060

2688

2061

if command == 'init':

2689

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

2690

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

2691

address = request[3]

2692

2693

for c in self.clients.values():

2694

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2695

continue

2696

if key_id and c.key_id == key_id:

2697

client = c

2698

break

2699

if fpr and c.fingerprint == fpr:

2062

fpr = request[1]

2063

address = request[2]

2064

2065

for c in self.clients.itervalues():

2066

if c.fingerprint == fpr:

2700

2067

client = c

2701

2068

break

2702

2069

else:

2703

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

2704

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

2070

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

2071

"dress: %s", fpr, address)

2705

2072

if self.use_dbus:

2706

2073

# Emit D-Bus signal

2707

mandos_dbus_service.ClientNotFound(key_id or fpr,

2074

mandos_dbus_service.ClientNotFound(fpr,

2708

2075

address[0])

2709

2076

parent_pipe.send(False)

2710

2077

return False

2711

2712

GLib.io_add_watch(

2713

parent_pipe.fileno(),

2714

GLib.IO_IN | GLib.IO_HUP,

2715

functools.partial(self.handle_ipc,

2716

parent_pipe=parent_pipe,

2717

proc=proc,

2718

client_object=client))

2078

2079

gobject.io_add_watch(parent_pipe.fileno(),

2080

gobject.IO_IN | gobject.IO_HUP,

2081

functools.partial(self.handle_ipc,

2082

parent_pipe =

2083

parent_pipe,

2084

proc = proc,

2085

client_object =

2086

client))

2719

2087

parent_pipe.send(True)

2720

2088

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

2721

2089

# same fileno

2724

2092

funcname = request[1]

2725

2093

args = request[2]

2726

2094

kwargs = request[3]

2727

2095

2728

2096

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

2729

2097

funcname)(*args,

2730

**kwargs)))

2731

2098

**kwargs)))

2099

2732

2100

if command == 'getattr':

2733

2101

attrname = request[1]

2734

if isinstance(client_object.__getattribute__(attrname),

2735

collections.Callable):

2736

parent_pipe.send(('function', ))

2102

if callable(client_object.__getattribute__(attrname)):

2103

parent_pipe.send(('function',))

2737

2104

else:

2738

parent_pipe.send((

2739

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

2740

2105

parent_pipe.send(('data', client_object

2106

.__getattribute__(attrname)))

2107

2741

2108

if command == 'setattr':

2742

2109

attrname = request[1]

2743

2110

value = request[2]

2744

2111

setattr(client_object, attrname, value)

2745

2112

2746

2113

return True

2747

2114

2748

2115

2749

2116

def rfc3339_duration_to_delta(duration):

2750

2117

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

2751

2118

2752

2119

>>> rfc3339_duration_to_delta("P7D")

2753

2120

datetime.timedelta(7)

2754

2121

>>> rfc3339_duration_to_delta("PT60S")

2764

2131

>>> rfc3339_duration_to_delta("P1DT3M20S")

2765

2132

datetime.timedelta(1, 200)

2766

2133

"""

2767

2134

2768

2135

# Parsing an RFC 3339 duration with regular expressions is not

2769

2136

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

2770

2137

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

2771

2138

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

2772

2139

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

2773

2140

# avoid excessive use of external libraries.

2774

2141

2775

2142

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

2776

Token = collections.namedtuple("Token", (

2777

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

2778

# a "group" containing digits

2779

"value", # datetime.timedelta or None

2780

"followers")) # Tokens valid after this token

2143

Token = collections.namedtuple("Token",

2144

("regexp", # To match token; if

2145

# "value" is not None,

2146

# must have a "group"

2147

# containing digits

2148

"value", # datetime.timedelta or

2149

# None

2150

"followers")) # Tokens valid after

2151

# this token

2781

2152

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

2782

2153

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

2783

2154

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

2784

2155

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

2785

2156

datetime.timedelta(seconds=1),

2786

frozenset((token_end, )))

2157

frozenset((token_end,)))

2787

2158

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

2788

2159

datetime.timedelta(minutes=1),

2789

2160

frozenset((token_second, token_end)))

2805

2176

frozenset((token_month, token_end)))

2806

2177

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

2807

2178

datetime.timedelta(weeks=1),

2808

frozenset((token_end, )))

2179

frozenset((token_end,)))

2809

2180

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

2810

2181

frozenset((token_year, token_month,

2811

2182

token_day, token_time,

2812

token_week)))

2813

# Define starting values:

2814

# Value so far

2815

value = datetime.timedelta()

2183

token_week))),

2184

# Define starting values

2185

value = datetime.timedelta() # Value so far

2816

2186

found_token = None

2817

# Following valid tokens

2818

followers = frozenset((token_duration, ))

2819

# String left to parse

2820

s = duration

2187

followers = frozenset(token_duration,) # Following valid tokens

2188

s = duration # String left to parse

2821

2189

# Loop until end token is found

2822

2190

while found_token is not token_end:

2823

2191

# Search for any currently valid tokens

2839

2207

break

2840

2208

else:

2841

2209

# No currently valid tokens were found

2842

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

2843

.format(duration))

2210

raise ValueError("Invalid RFC 3339 duration")

2844

2211

# End token found

2845

2212

return value

2846

2213

2847

2214

2848

2215

def string_to_delta(interval):

2849

2216

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

2850

2217

2851

2218

>>> string_to_delta('7d')

2852

2219

datetime.timedelta(7)

2853

2220

>>> string_to_delta('60s')

2861

2228

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

2862

2229

datetime.timedelta(0, 330)

2863

2230

"""

2864

2231

2865

2232

try:

2866

2233

return rfc3339_duration_to_delta(interval)

2867

2234

except ValueError:

2868

2235

pass

2869

2236

2870

2237

timevalue = datetime.timedelta(0)

2871

2238

for s in interval.split():

2872

2239

try:

2873

suffix = s[-1]

2240

suffix = unicode(s[-1])

2874

2241

value = int(s[:-1])

2875

2242

if suffix == "d":

2876

2243

delta = datetime.timedelta(value)

2883

2250

elif suffix == "w":

2884

2251

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

2885

2252

else:

2886

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

2887

except IndexError as e:

2253

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

2254

.format(suffix))

2255

except (ValueError, IndexError) as e:

2888

2256

raise ValueError(*(e.args))

2889

2257

timevalue += delta

2890

2258

return timevalue

2891

2259

2892

2260

2893

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

2261

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

2894

2262

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

2895

2263

2896

2264

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

2897

2265

if os.fork():

2898

2266

sys.exit()

2906

2274

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

2907

2275

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

2908

2276

raise OSError(errno.ENODEV,

2909

"{} not a character device"

2277

"{0} not a character device"

2910

2278

.format(os.devnull))

2911

2279

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

2912

2280

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

2916

2284

2917

2285

2918

2286

def main():

2919

2287

2920

2288

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

2921

2289

# Parsing of options, both command line and config file

2922

2290

2923

2291

parser = argparse.ArgumentParser()

2924

2292

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

2925

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

2293

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

2926

2294

help="show version number and exit")

2927

2295

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

2928

2296

help="Bind to interface IF")

2961

2329

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

2962

2330

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

2963

2331

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

2964

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

2965

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

2966

default=None)

2967

2332

2968

2333

options = parser.parse_args()

2969

2334

2970

2335

if options.check:

2971

2336

import doctest

2972

fail_count, test_count = doctest.testmod()

2973

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

2974

2337

doctest.testmod()

2338

sys.exit()

2339

2975

2340

# Default values for config file for server-global settings

2976

if gnutls.has_rawpk:

2977

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

2978

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

2979

else:

2980

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

2981

":+SIGN-DSA-SHA256")

2982

server_defaults = {"interface": "",

2983

"address": "",

2984

"port": "",

2985

"debug": "False",

2986

"priority": priority,

2987

"servicename": "Mandos",

2988

"use_dbus": "True",

2989

"use_ipv6": "True",

2990

"debuglevel": "",

2991

"restore": "True",

2992

"socket": "",

2993

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

2994

"foreground": "False",

2995

"zeroconf": "True",

2996

}

2997

del priority

2998

2341

server_defaults = { "interface": "",

2342

"address": "",

2343

"port": "",

2344

"debug": "False",

2345

"priority":

2346

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224",

2347

"servicename": "Mandos",

2348

"use_dbus": "True",

2349

"use_ipv6": "True",

2350

"debuglevel": "",

2351

"restore": "True",

2352

"socket": "",

2353

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

2354

"foreground": "False",

2355

}

2356

2999

2357

# Parse config file for server-global settings

3000

2358

server_config = configparser.SafeConfigParser(server_defaults)

3001

2359

del server_defaults

3002

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

2360

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

2361

"mandos.conf"))

3003

2362

# Convert the SafeConfigParser object to a dict

3004

2363

server_settings = server_config.defaults()

3005

2364

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

3006

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

3007

"foreground", "zeroconf"):

2365

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

3008

2366

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

3009

2367

option)

3010

2368

if server_settings["port"]:

3020

2378

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

3021

2379

["socket"])

3022

2380

del server_config

3023

2381

3024

2382

# Override the settings from the config file with command line

3025

2383

# options, if set.

3026

2384

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

3027

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

3028

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

3029

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

2385

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

2386

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

2387

"statedir", "socket", "foreground"):

3030

2388

value = getattr(options, option)

3031

2389

if value is not None:

3032

2390

server_settings[option] = value

3033

2391

del options

3034

2392

# Force all strings to be unicode

3035

2393

for option in server_settings.keys():

3036

if isinstance(server_settings[option], bytes):

3037

server_settings[option] = (server_settings[option]

3038

.decode("utf-8"))

2394

if type(server_settings[option]) is str:

2395

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

3039

2396

# Force all boolean options to be boolean

3040

2397

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

3041

"foreground", "zeroconf"):

2398

"foreground"):

3042

2399

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

3043

2400

# Debug implies foreground

3044

2401

if server_settings["debug"]:

3045

2402

server_settings["foreground"] = True

3046

2403

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

3047

2404

3048

2405

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

3049

3050

if (not server_settings["zeroconf"]

3051

and not (server_settings["port"]

3052

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

3053

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

3054

2406

3055

2407

# For convenience

3056

2408

debug = server_settings["debug"]

3057

2409

debuglevel = server_settings["debuglevel"]

3060

2412

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

3061

2413

stored_state_file)

3062

2414

foreground = server_settings["foreground"]

3063

zeroconf = server_settings["zeroconf"]

3064

2415

3065

2416

if debug:

3066

2417

initlogger(debug, logging.DEBUG)

3067

2418

else:

3070

2421

else:

3071

2422

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

3072

2423

initlogger(debug, level)

3073

2424

3074

2425

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

3075

syslogger.setFormatter(

3076

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

3077

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

3078

server_settings["servicename"])))

3079

2426

syslogger.setFormatter(logging.Formatter

2427

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

2428

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

2429

.format(server_settings

2430

["servicename"])))

2431

3080

2432

# Parse config file with clients

3081

2433

client_config = configparser.SafeConfigParser(Client

3082

2434

.client_defaults)

3083

2435

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

3084

2436

"clients.conf"))

3085

2437

3086

2438

global mandos_dbus_service

3087

2439

mandos_dbus_service = None

3088

3089

socketfd = None

3090

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

3091

socketfd = server_settings["socket"]

3092

tcp_server = MandosServer(

3093

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

3094

ClientHandler,

3095

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

3096

use_ipv6=use_ipv6,

3097

gnutls_priority=server_settings["priority"],

3098

use_dbus=use_dbus,

3099

socketfd=socketfd)

2440

2441

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

2442

server_settings["port"]),

2443

ClientHandler,

2444

interface=(server_settings["interface"]

2445

or None),

2446

use_ipv6=use_ipv6,

2447

gnutls_priority=

2448

server_settings["priority"],

2449

use_dbus=use_dbus,

2450

socketfd=(server_settings["socket"]

2451

or None))

3100

2452

if not foreground:

3101

2453

pidfilename = "/run/mandos.pid"

3102

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

3103

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

3104

2454

pidfile = None

3105

2455

try:

3106

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

2456

pidfile = open(pidfilename, "w")

3107

2457

except IOError as e:

3108

2458

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

3109

2459

exc_info=e)

3110

3111

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

3112

("mandos", "mandos"),

3113

("nobody", "nogroup")):

2460

2461

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

3114

2462

try:

3115

2463

uid = pwd.getpwnam(name).pw_uid

3116

gid = pwd.getpwnam(group).pw_gid

2464

gid = pwd.getpwnam(name).pw_gid

3117

2465

break

3118

2466

except KeyError:

3119

2467

continue

3123

2471

try:

3124

2472

os.setgid(gid)

3125

2473

os.setuid(uid)

3126

if debug:

3127

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

3128

gid))

3129

2474

except OSError as error:

3130

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

3131

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

3132

2475

if error.errno != errno.EPERM:

3133

raise

3134

2476

raise error

2477

3135

2478

if debug:

3136

2479

# Enable all possible GnuTLS debugging

3137

2480

3138

2481

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

3139

2482

# - GnuTLS manual

3140

gnutls.global_set_log_level(11)

3141

3142

@gnutls.log_func

2483

gnutls.library.functions.gnutls_global_set_log_level(11)

2484

2485

@gnutls.library.types.gnutls_log_func

3143

2486

def debug_gnutls(level, string):

3144

2487

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

3145

3146

gnutls.global_set_log_function(debug_gnutls)

3147

2488

2489

(gnutls.library.functions

2490

.gnutls_global_set_log_function(debug_gnutls))

2491

3148

2492

# Redirect stdin so all checkers get /dev/null

3149

2493

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

3150

2494

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

3151

2495

if null > 2:

3152

2496

os.close(null)

3153

2497

3154

2498

# Need to fork before connecting to D-Bus

3155

2499

if not foreground:

3156

2500

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

3157

2501

daemon()

3158

3159

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

3160

# to inform GLib that threads will be used.

3161

GLib.threads_init()

3162

2502

2503

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

2504

# need to inform gobject that threads will be used.

2505

gobject.threads_init()

2506

3163

2507

global main_loop

3164

2508

# From the Avahi example code

3165

2509

DBusGMainLoop(set_as_default=True)

3166

main_loop = GLib.MainLoop()

2510

main_loop = gobject.MainLoop()

3167

2511

bus = dbus.SystemBus()

3168

2512

# End of Avahi example code

3169

2513

if use_dbus:

3170

2514

try:

3171

2515

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

3172

bus,

3173

do_not_queue=True)

3174

old_bus_name = dbus.service.BusName(

3175

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

3176

do_not_queue=True)

3177

except dbus.exceptions.DBusException as e:

2516

bus, do_not_queue=True)

2517

old_bus_name = (dbus.service.BusName

2518

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

2519

do_not_queue=True))

2520

except dbus.exceptions.NameExistsException as e:

3178

2521

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

3179

2522

use_dbus = False

3180

2523

server_settings["use_dbus"] = False

3181

2524

tcp_server.use_dbus = False

3182

if zeroconf:

3183

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3184

service = AvahiServiceToSyslog(

3185

name=server_settings["servicename"],

3186

servicetype="_mandos._tcp",

3187

protocol=protocol,

3188

bus=bus)

3189

if server_settings["interface"]:

3190

service.interface = if_nametoindex(

3191

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

3192

2525

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2526

service = AvahiServiceToSyslog(name =

2527

server_settings["servicename"],

2528

servicetype = "_mandos._tcp",

2529

protocol = protocol, bus = bus)

2530

if server_settings["interface"]:

2531

service.interface = (if_nametoindex

2532

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

2533

3193

2534

global multiprocessing_manager

3194

2535

multiprocessing_manager = multiprocessing.Manager()

3195

2536

3196

2537

client_class = Client

3197

2538

if use_dbus:

3198

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

3199

2539

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

2540

3200

2541

client_settings = Client.config_parser(client_config)

3201

2542

old_client_settings = {}

3202

2543

clients_data = {}

3203

2544

3204

2545

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

3205

2546

global wnull

3206

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

2547

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

3207

2548

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

3208

2549

# mode

3209

2550

if debug or not foreground:

3210

2551

wnull.close()

3211

2552

3212

2553

# Get client data and settings from last running state.

3213

2554

if server_settings["restore"]:

3214

2555

try:

3215

2556

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

3216

if sys.version_info.major == 2:

3217

clients_data, old_client_settings = pickle.load(

3218

stored_state)

3219

else:

3220

bytes_clients_data, bytes_old_client_settings = (

3221

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

3222

# Fix bytes to strings

3223

# clients_data

3224

# .keys()

3225

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

3226

if isinstance(key, bytes)

3227

else key): value

3228

for key, value in

3229

bytes_clients_data.items()}

3230

del bytes_clients_data

3231

for key in clients_data:

3232

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

3233

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

3234

for k, v in

3235

clients_data[key].items()}

3236

clients_data[key] = value

3237

# .client_structure

3238

value["client_structure"] = [

3239

(s.decode("utf-8")

3240

if isinstance(s, bytes)

3241

else s) for s in

3242

value["client_structure"]]

3243

# .name & .host

3244

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

3245

if isinstance(value[k], bytes):

3246

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

3247

if not value.has_key("key_id"):

3248

value["key_id"] = ""

3249

elif not value.has_key("fingerprint"):

3250

value["fingerprint"] = ""

3251

# old_client_settings

3252

# .keys()

3253

old_client_settings = {

3254

(key.decode("utf-8")

3255

if isinstance(key, bytes)

3256

else key): value

3257

for key, value in

3258

bytes_old_client_settings.items()}

3259

del bytes_old_client_settings

3260

# .host

3261

for value in old_client_settings.values():

3262

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

3263

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

3264

.decode("utf-8"))

2557

clients_data, old_client_settings = (pickle.load

2558

(stored_state))

3265

2559

os.remove(stored_state_path)

3266

2560

except IOError as e:

3267

2561

if e.errno == errno.ENOENT:

3268

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

3269

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

2562

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

2563

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

3270

2564

else:

3271

2565

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

3272

2566

exc_info=e)

3273

2567

raise

3274

2568

except EOFError as e:

3275

2569

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

3276

"EOFError:",

3277

exc_info=e)

3278

2570

"EOFError:", exc_info=e)

2571

3279

2572

with PGPEngine() as pgp:

3280

for client_name, client in clients_data.items():

2573

for client_name, client in clients_data.iteritems():

3281

2574

# Skip removed clients

3282

2575

if client_name not in client_settings:

3283

2576

continue

3284

2577

3285

2578

# Decide which value to use after restoring saved state.

3286

2579

# We have three different values: Old config file,

3287

2580

# new config file, and saved state.

3292

2585

# For each value in new config, check if it

3293

2586

# differs from the old config value (Except for

3294

2587

# the "secret" attribute)

3295

if (name != "secret"

3296

and (value !=

3297

old_client_settings[client_name][name])):

2588

if (name != "secret" and

2589

value != old_client_settings[client_name]

2590

[name]):

3298

2591

client[name] = value

3299

2592

except KeyError:

3300

2593

pass

3301

2594

3302

2595

# Clients who has passed its expire date can still be

3303

# enabled if its last checker was successful. A Client

2596

# enabled if its last checker was successful. Clients

3304

2597

# whose checker succeeded before we stored its state is

3305

2598

# assumed to have successfully run all checkers during

3306

2599

# downtime.

3308

2601

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

3309

2602

if not client["last_checked_ok"]:

3310

2603

logger.warning(

3311

"disabling client {} - Client never "

3312

"performed a successful checker".format(

3313

client_name))

2604

"disabling client {0} - Client never "

2605

"performed a successful checker"

2606

.format(client_name))

3314

2607

client["enabled"] = False

3315

2608

elif client["last_checker_status"] != 0:

3316

2609

logger.warning(

3317

"disabling client {} - Client last"

3318

" checker failed with error code"

3319

" {}".format(

3320

client_name,

3321

client["last_checker_status"]))

2610

"disabling client {0} - Client "

2611

"last checker failed with error code {1}"

2612

.format(client_name,

2613

client["last_checker_status"]))

3322

2614

client["enabled"] = False

3323

2615

else:

3324

client["expires"] = (

3325

datetime.datetime.utcnow()

3326

+ client["timeout"])

2616

client["expires"] = (datetime.datetime

2617

.utcnow()

2618

+ client["timeout"])

3327

2619

logger.debug("Last checker succeeded,"

3328

" keeping {} enabled".format(

3329

client_name))

2620

" keeping {0} enabled"

2621

.format(client_name))

3330

2622

try:

3331

client["secret"] = pgp.decrypt(

3332

client["encrypted_secret"],

3333

client_settings[client_name]["secret"])

2623

client["secret"] = (

2624

pgp.decrypt(client["encrypted_secret"],

2625

client_settings[client_name]

2626

["secret"]))

3334

2627

except PGPError:

3335

2628

# If decryption fails, we use secret from new settings

3336

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

3337

client_name))

3338

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

3339

["secret"])

3340

2629

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

2630

.format(client_name))

2631

client["secret"] = (

2632

client_settings[client_name]["secret"])

2633

3341

2634

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

3342

2635

for client_name in (set(old_client_settings)

3343

2636

- set(client_settings)):

3345

2638

for client_name in (set(client_settings)

3346

2639

- set(old_client_settings)):

3347

2640

clients_data[client_name] = client_settings[client_name]

3348

2641

3349

2642

# Create all client objects

3350

for client_name, client in clients_data.items():

2643

for client_name, client in clients_data.iteritems():

3351

2644

tcp_server.clients[client_name] = client_class(

3352

name=client_name,

3353

settings=client,

3354

server_settings=server_settings)

3355

2645

name = client_name, settings = client,

2646

server_settings = server_settings)

2647

3356

2648

if not tcp_server.clients:

3357

2649

logger.warning("No clients defined")

3358

2650

3359

2651

if not foreground:

3360

2652

if pidfile is not None:

3361

pid = os.getpid()

3362

2653

try:

3363

2654

with pidfile:

3364

print(pid, file=pidfile)

2655

pid = os.getpid()

2656

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

3365

2657

except IOError:

3366

2658

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

3367

2659

pidfilename, pid)

3368

2660

del pidfile

3369

2661

del pidfilename

3370

3371

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

3372

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3373

lambda: main_loop.quit() and False)

3374

2662

2663

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

2664

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

2665

3375

2666

if use_dbus:

3376

3377

@alternate_dbus_interfaces(

3378

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

3379

class MandosDBusService(DBusObjectWithObjectManager):

2667

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

2668

"se.bsnet.fukt.Mandos"})

2669

class MandosDBusService(DBusObjectWithProperties):

3380

2670

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

3381

3382

2671

def __init__(self):

3383

2672

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

3384

3385

2673

_interface = "se.recompile.Mandos"

3386

2674

2675

@dbus_interface_annotations(_interface)

2676

def _foo(self):

2677

return { "org.freedesktop.DBus.Property"

2678

".EmitsChangedSignal":

2679

"false"}

2680

3387

2681

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

3388

2682

def ClientAdded(self, objpath):

3389

2683

"D-Bus signal"

3390

2684

pass

3391

2685

3392

2686

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

3393

def ClientNotFound(self, key_id, address):

2687

def ClientNotFound(self, fingerprint, address):

3394

2688

"D-Bus signal"

3395

2689

pass

3396

3397

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

3398

"true"})

2690

3399

2691

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

3400

2692

def ClientRemoved(self, objpath, name):

3401

2693

"D-Bus signal"

3402

2694

pass

3403

3404

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

3405

"true"})

2695

3406

2696

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

3407

2697

def GetAllClients(self):

3408

2698

"D-Bus method"

3409

return dbus.Array(c.dbus_object_path for c in

3410

tcp_server.clients.values())

3411

3412

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

3413

"true"})

2699

return dbus.Array(c.dbus_object_path

2700

for c in

2701

tcp_server.clients.itervalues())

2702

3414

2703

@dbus.service.method(_interface,

3415

2704

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

3416

2705

def GetAllClientsWithProperties(self):

3417

2706

"D-Bus method"

3418

2707

return dbus.Dictionary(

3419

{c.dbus_object_path: c.GetAll(

3420

"se.recompile.Mandos.Client")

3421

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

2708

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

2709

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

3422

2710

signature="oa{sv}")

3423

2711

3424

2712

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

3425

2713

def RemoveClient(self, object_path):

3426

2714

"D-Bus method"

3427

for c in tcp_server.clients.values():

2715

for c in tcp_server.clients.itervalues():

3428

2716

if c.dbus_object_path == object_path:

3429

2717

del tcp_server.clients[c.name]

3430

2718

c.remove_from_connection()

3431

# Don't signal the disabling

2719

# Don't signal anything except ClientRemoved

3432

2720

c.disable(quiet=True)

3433

# Emit D-Bus signal for removal

3434

self.client_removed_signal(c)

2721

# Emit D-Bus signal

2722

self.ClientRemoved(object_path, c.name)

3435

2723

return

3436

2724

raise KeyError(object_path)

3437

2725

3438

2726

del _interface

3439

3440

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3441

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

3442

def GetManagedObjects(self):

3443

"""D-Bus method"""

3444

return dbus.Dictionary(

3445

{client.dbus_object_path:

3446

dbus.Dictionary(

3447

{interface: client.GetAll(interface)

3448

for interface in

3449

client._get_all_interface_names()})

3450

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

3451

3452

def client_added_signal(self, client):

3453

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

3454

if use_dbus:

3455

# New standard signal

3456

self.InterfacesAdded(

3457

client.dbus_object_path,

3458

dbus.Dictionary(

3459

{interface: client.GetAll(interface)

3460

for interface in

3461

client._get_all_interface_names()}))

3462

# Old signal

3463

self.ClientAdded(client.dbus_object_path)

3464

3465

def client_removed_signal(self, client):

3466

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

3467

if use_dbus:

3468

# New standard signal

3469

self.InterfacesRemoved(

3470

client.dbus_object_path,

3471

client._get_all_interface_names())

3472

# Old signal

3473

self.ClientRemoved(client.dbus_object_path,

3474

client.name)

3475

2727

3476

2728

mandos_dbus_service = MandosDBusService()

3477

3478

# Save modules to variables to exempt the modules from being

3479

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

3480

mp = multiprocessing

3481

wn = wnull

3482

2729

3483

2730

def cleanup():

3484

2731

"Cleanup function; run on exit"

3485

if zeroconf:

3486

service.cleanup()

3487

3488

mp.active_children()

3489

wn.close()

2732

service.cleanup()

2733

2734

multiprocessing.active_children()

2735

wnull.close()

3490

2736

if not (tcp_server.clients or client_settings):

3491

2737

return

3492

2738

3493

2739

# Store client before exiting. Secrets are encrypted with key

3494

2740

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

3495

2741

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

3496

2742

clients = {}

3497

2743

with PGPEngine() as pgp:

3498

for client in tcp_server.clients.values():

2744

for client in tcp_server.clients.itervalues():

3499

2745

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

3500

2746

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

3501

2747

key)

3502

2748

client_dict = {}

3503

2749

3504

2750

# A list of attributes that can not be pickled

3505

2751

# + secret.

3506

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

3507

"checker", "server_settings"}

3508

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

3509

.Object):

2752

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

2753

"checker", "server_settings"))

2754

for name, typ in (inspect.getmembers

2755

(dbus.service.Object)):

3510

2756

exclude.add(name)

3511

2757

3512

2758

client_dict["encrypted_secret"] = (client

3513

2759

.encrypted_secret)

3514

2760

for attr in client.client_structure:

3515

2761

if attr not in exclude:

3516

2762

client_dict[attr] = getattr(client, attr)

3517

2763

3518

2764

clients[client.name] = client_dict

3519

2765

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

3520

2766

3521

2767

try:

3522

with tempfile.NamedTemporaryFile(

3523

mode='wb',

3524

suffix=".pickle",

3525

prefix='clients-',

3526

dir=os.path.dirname(stored_state_path),

3527

delete=False) as stored_state:

3528

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

3529

protocol=2)

3530

tempname = stored_state.name

2768

with (tempfile.NamedTemporaryFile

2769

(mode='wb', suffix=".pickle", prefix='clients-',

2770

dir=os.path.dirname(stored_state_path),

2771

delete=False)) as stored_state:

2772

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

2773

tempname=stored_state.name

3531

2774

os.rename(tempname, stored_state_path)

3532

2775

except (IOError, OSError) as e:

3533

2776

if not debug:

3536

2779

except NameError:

3537

2780

pass

3538

2781

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

3539

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

2782

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

3540

2783

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

3541

2784

else:

3542

2785

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

3543

2786

exc_info=e)

3544

raise

3545

2787

raise e

2788

3546

2789

# Delete all clients, and settings from config

3547

2790

while tcp_server.clients:

3548

2791

name, client = tcp_server.clients.popitem()

3549

2792

if use_dbus:

3550

2793

client.remove_from_connection()

3551

# Don't signal the disabling

2794

# Don't signal anything except ClientRemoved

3552

2795

client.disable(quiet=True)

3553

# Emit D-Bus signal for removal

3554

2796

if use_dbus:

3555

mandos_dbus_service.client_removed_signal(client)

2797

# Emit D-Bus signal

2798

mandos_dbus_service.ClientRemoved(client

2799

.dbus_object_path,

2800

client.name)

3556

2801

client_settings.clear()

3557

2802

3558

2803

atexit.register(cleanup)

3559

3560

for client in tcp_server.clients.values():

2804

2805

for client in tcp_server.clients.itervalues():

3561

2806

if use_dbus:

3562

# Emit D-Bus signal for adding

3563

mandos_dbus_service.client_added_signal(client)

2807

# Emit D-Bus signal

2808

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3564

2809

# Need to initiate checking of clients

3565

2810

if client.enabled:

3566

2811

client.init_checker()

3567

2812

3568

2813

tcp_server.enable()

3569

2814

tcp_server.server_activate()

3570

2815

3571

2816

# Find out what port we got

3572

if zeroconf:

3573

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

2817

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

3574

2818

if use_ipv6:

3575

2819

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

3576

2820

" flowinfo %d, scope_id %d",

3578

2822

else: # IPv4

3579

2823

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

3580

2824

*tcp_server.socket.getsockname())

3581

3582

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

3583

2825

2826

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

2827

3584

2828

try:

3585

if zeroconf:

3586

# From the Avahi example code

3587

try:

3588

service.activate()

3589

except dbus.exceptions.DBusException as error:

3590

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

3591

cleanup()

3592

sys.exit(1)

3593

# End of Avahi example code

3594

3595

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

3596

lambda *args, **kwargs:

3597

(tcp_server.handle_request

3598

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

3599

2829

# From the Avahi example code

2830

try:

2831

service.activate()

2832

except dbus.exceptions.DBusException as error:

2833

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

2834

cleanup()

2835

sys.exit(1)

2836

# End of Avahi example code

2837

2838

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

2839

lambda *args, **kwargs:

2840

(tcp_server.handle_request

2841

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

2842

3600

2843

logger.debug("Starting main loop")

3601

2844

main_loop.run()

3602

2845

except AvahiError as error:

3611

2854

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

3612

2855

cleanup()

3613

2856

3614

3615

2857

if __name__ == '__main__':

3616

2858

main()