/mandos/trunk : revision 713

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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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import gi

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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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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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version = "1.8.5"

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SO_BINDTODEVICE = None

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version = "1.6.6"

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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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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 = (logging.handlers.SysLogHandler

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(facility =

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logging.handlers.SysLogHandler.LOG_DAEMON,

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address = str("/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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.replace(b"\n", b"\\n")

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

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return encoded

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def encrypt(self, data, password):

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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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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"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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@staticmethod

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def string_array_to_txt_array(t):

295

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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307

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class AvahiError(Exception):

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

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self.value = value

310

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

311

**kwargs)

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

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def __unicode__(self):

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return unicode(repr(self.value))

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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class AvahiService(object):

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"""An Avahi (Zeroconf) service.

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Attributes:

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

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Used to optionally bind to the specified interface.

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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,

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name=None,

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servicetype=None,

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port=None,

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TXT=None,

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domain="",

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host="",

351

max_renames=32768,

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protocol=avahi.PROTO_UNSPEC,

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bus=None):

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

260

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self, remove=True):

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def rename(self):

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

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280

if self.rename_count >= self.max_renames:

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

373

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

376

self.name = str(

377

self.server.GetAlternativeServiceName(self.name))

378

self.rename_count += 1

285

self.name = unicode(self.server

286

.GetAlternativeServiceName(self.name))

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287

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

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self.name)

381

if remove:

382

self.remove()

289

self.remove()

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290

try:

384

291

self.add()

385

292

except dbus.exceptions.DBusException as error:

386

if (error.get_dbus_name()

387

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

388

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

389

return self.rename(remove=False)

390

else:

391

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

392

self.cleanup()

393

os._exit(1)

394

293

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

294

self.cleanup()

295

os._exit(1)

296

self.rename_count += 1

297

395

298

def remove(self):

396

299

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

397

300

if self.entry_group_state_changed_match is not None:

399

302

self.entry_group_state_changed_match = None

400

303

if self.group is not None:

401

304

self.group.Reset()

402

305

403

306

def add(self):

404

307

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

405

308

self.remove()

422

325

dbus.UInt16(self.port),

423

326

avahi.string_array_to_txt_array(self.TXT))

424

327

self.group.Commit()

425

328

426

329

def entry_group_state_changed(self, state, error):

427

330

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

428

331

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

429

332

430

333

if state == avahi.ENTRY_GROUP_ESTABLISHED:

431

334

logger.debug("Zeroconf service established.")

432

335

elif state == avahi.ENTRY_GROUP_COLLISION:

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337

self.rename()

435

338

elif state == avahi.ENTRY_GROUP_FAILURE:

436

339

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

437

str(error))

438

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

439

340

unicode(error))

341

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

342

.format(error))

343

440

344

def cleanup(self):

441

345

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

442

346

if self.group is not None:

447

351

pass

448

352

self.group = None

449

353

self.remove()

450

354

451

355

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

452

356

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

453

357

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

454

bad_states = {

455

avahi.SERVER_INVALID: "Zeroconf server invalid",

456

avahi.SERVER_REGISTERING: None,

457

avahi.SERVER_COLLISION: "Zeroconf server name collision",

458

avahi.SERVER_FAILURE: "Zeroconf server failure",

459

}

358

bad_states = { avahi.SERVER_INVALID:

359

"Zeroconf server invalid",

360

avahi.SERVER_REGISTERING: None,

361

avahi.SERVER_COLLISION:

362

"Zeroconf server name collision",

363

avahi.SERVER_FAILURE:

364

"Zeroconf server failure" }

460

365

if state in bad_states:

461

366

if bad_states[state] is not None:

462

367

if error is None:

465

370

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

466

371

self.cleanup()

467

372

elif state == avahi.SERVER_RUNNING:

468

try:

469

self.add()

470

except dbus.exceptions.DBusException as error:

471

if (error.get_dbus_name()

472

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

473

logger.info("Local Zeroconf service name"

474

" collision.")

475

return self.rename(remove=False)

476

else:

477

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

478

self.cleanup()

479

os._exit(1)

373

self.add()

480

374

else:

481

375

if error is None:

482

376

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

483

377

else:

484

378

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

485

379

486

380

def activate(self):

487

381

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

488

382

if self.server is None:

492

386

follow_name_owner_changes=True),

493

387

avahi.DBUS_INTERFACE_SERVER)

494

388

self.server.connect_to_signal("StateChanged",

495

self.server_state_changed)

389

self.server_state_changed)

496

390

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

497

391

498

392

499

393

class AvahiServiceToSyslog(AvahiService):

500

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

394

def rename(self):

501

395

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

502

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

503

syslogger.setFormatter(logging.Formatter(

504

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

505

.format(self.name)))

396

ret = AvahiService.rename(self)

397

syslogger.setFormatter(logging.Formatter

398

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

399

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

400

.format(self.name)))

506

401

return ret

507

402

508

403

509

# Pretend that we have a GnuTLS module

510

class gnutls(object):

511

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

512

513

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

514

if library is None:

515

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

516

_library = ctypes.cdll.LoadLibrary(library)

517

del library

518

519

# Unless otherwise indicated, the constants and types below are

520

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

521

522

# Constants

523

E_SUCCESS = 0

524

E_INTERRUPTED = -52

525

E_AGAIN = -28

526

CRT_OPENPGP = 2

527

CRT_RAWPK = 3

528

CLIENT = 2

529

SHUT_RDWR = 0

530

CRD_CERTIFICATE = 1

531

E_NO_CERTIFICATE_FOUND = -49

532

X509_FMT_DER = 0

533

NO_TICKETS = 1<<10

534

ENABLE_RAWPK = 1<<18

535

CTYPE_PEERS = 3

536

KEYID_USE_SHA256 = 1 # gnutls/x509.h

537

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

538

539

# Types

540

class session_int(ctypes.Structure):

541

_fields_ = []

542

session_t = ctypes.POINTER(session_int)

543

544

class certificate_credentials_st(ctypes.Structure):

545

_fields_ = []

546

certificate_credentials_t = ctypes.POINTER(

547

certificate_credentials_st)

548

certificate_type_t = ctypes.c_int

549

550

class datum_t(ctypes.Structure):

551

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

552

('size', ctypes.c_uint)]

553

554

class openpgp_crt_int(ctypes.Structure):

555

_fields_ = []

556

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

557

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

558

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

559

credentials_type_t = ctypes.c_int

560

transport_ptr_t = ctypes.c_void_p

561

close_request_t = ctypes.c_int

562

563

# Exceptions

564

class Error(Exception):

565

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

566

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

567

# code is passed, convert it to a string with

568

# gnutls.strerror()

569

self.code = code

570

if message is None and code is not None:

571

message = gnutls.strerror(code)

572

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

573

message, *args)

574

575

class CertificateSecurityError(Error):

576

pass

577

578

# Classes

579

class Credentials(object):

580

def __init__(self):

581

self._c_object = gnutls.certificate_credentials_t()

582

gnutls.certificate_allocate_credentials(

583

ctypes.byref(self._c_object))

584

self.type = gnutls.CRD_CERTIFICATE

585

586

def __del__(self):

587

gnutls.certificate_free_credentials(self._c_object)

588

589

class ClientSession(object):

590

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

591

self._c_object = gnutls.session_t()

592

gnutls_flags = gnutls.CLIENT

593

if gnutls.check_version(b"3.5.6"):

594

gnutls_flags |= gnutls.NO_TICKETS

595

if gnutls.has_rawpk:

596

gnutls_flags |= gnutls.ENABLE_RAWPK

597

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

598

del gnutls_flags

599

gnutls.set_default_priority(self._c_object)

600

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

601

gnutls.handshake_set_private_extensions(self._c_object,

602

True)

603

self.socket = socket

604

if credentials is None:

605

credentials = gnutls.Credentials()

606

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

607

ctypes.cast(credentials._c_object,

608

ctypes.c_void_p))

609

self.credentials = credentials

610

611

def __del__(self):

612

gnutls.deinit(self._c_object)

613

614

def handshake(self):

615

return gnutls.handshake(self._c_object)

616

617

def send(self, data):

618

data = bytes(data)

619

data_len = len(data)

620

while data_len > 0:

621

data_len -= gnutls.record_send(self._c_object,

622

data[-data_len:],

623

data_len)

624

625

def bye(self):

626

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

627

628

# Error handling functions

629

def _error_code(result):

630

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

631

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

632

if result >= 0:

633

return result

634

if result == gnutls.E_NO_CERTIFICATE_FOUND:

635

raise gnutls.CertificateSecurityError(code=result)

636

raise gnutls.Error(code=result)

637

638

def _retry_on_error(result, func, arguments):

639

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

640

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

641

while result < 0:

642

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

643

return _error_code(result)

644

result = func(*arguments)

645

return result

646

647

# Unless otherwise indicated, the function declarations below are

648

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

649

650

# Functions

651

priority_set_direct = _library.gnutls_priority_set_direct

652

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

653

ctypes.POINTER(ctypes.c_char_p)]

654

priority_set_direct.restype = _error_code

655

656

init = _library.gnutls_init

657

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

658

init.restype = _error_code

659

660

set_default_priority = _library.gnutls_set_default_priority

661

set_default_priority.argtypes = [session_t]

662

set_default_priority.restype = _error_code

663

664

record_send = _library.gnutls_record_send

665

record_send.argtypes = [session_t, ctypes.c_void_p,

666

ctypes.c_size_t]

667

record_send.restype = ctypes.c_ssize_t

668

record_send.errcheck = _retry_on_error

669

670

certificate_allocate_credentials = (

671

_library.gnutls_certificate_allocate_credentials)

672

certificate_allocate_credentials.argtypes = [

673

ctypes.POINTER(certificate_credentials_t)]

674

certificate_allocate_credentials.restype = _error_code

675

676

certificate_free_credentials = (

677

_library.gnutls_certificate_free_credentials)

678

certificate_free_credentials.argtypes = [

679

certificate_credentials_t]

680

certificate_free_credentials.restype = None

681

682

handshake_set_private_extensions = (

683

_library.gnutls_handshake_set_private_extensions)

684

handshake_set_private_extensions.argtypes = [session_t,

685

ctypes.c_int]

686

handshake_set_private_extensions.restype = None

687

688

credentials_set = _library.gnutls_credentials_set

689

credentials_set.argtypes = [session_t, credentials_type_t,

690

ctypes.c_void_p]

691

credentials_set.restype = _error_code

692

693

strerror = _library.gnutls_strerror

694

strerror.argtypes = [ctypes.c_int]

695

strerror.restype = ctypes.c_char_p

696

697

certificate_type_get = _library.gnutls_certificate_type_get

698

certificate_type_get.argtypes = [session_t]

699

certificate_type_get.restype = _error_code

700

701

certificate_get_peers = _library.gnutls_certificate_get_peers

702

certificate_get_peers.argtypes = [session_t,

703

ctypes.POINTER(ctypes.c_uint)]

704

certificate_get_peers.restype = ctypes.POINTER(datum_t)

705

706

global_set_log_level = _library.gnutls_global_set_log_level

707

global_set_log_level.argtypes = [ctypes.c_int]

708

global_set_log_level.restype = None

709

710

global_set_log_function = _library.gnutls_global_set_log_function

711

global_set_log_function.argtypes = [log_func]

712

global_set_log_function.restype = None

713

714

deinit = _library.gnutls_deinit

715

deinit.argtypes = [session_t]

716

deinit.restype = None

717

718

handshake = _library.gnutls_handshake

719

handshake.argtypes = [session_t]

720

handshake.restype = _error_code

721

handshake.errcheck = _retry_on_error

722

723

transport_set_ptr = _library.gnutls_transport_set_ptr

724

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

725

transport_set_ptr.restype = None

726

727

bye = _library.gnutls_bye

728

bye.argtypes = [session_t, close_request_t]

729

bye.restype = _error_code

730

bye.errcheck = _retry_on_error

731

732

check_version = _library.gnutls_check_version

733

check_version.argtypes = [ctypes.c_char_p]

734

check_version.restype = ctypes.c_char_p

735

736

_need_version = b"3.3.0"

737

if check_version(_need_version) is None:

738

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

739

.format(_need_version))

740

741

_tls_rawpk_version = b"3.6.6"

742

has_rawpk = bool(check_version(_tls_rawpk_version))

743

744

if has_rawpk:

745

# Types

746

class pubkey_st(ctypes.Structure):

747

_fields = []

748

pubkey_t = ctypes.POINTER(pubkey_st)

749

750

x509_crt_fmt_t = ctypes.c_int

751

752

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

753

pubkey_init = _library.gnutls_pubkey_init

754

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

755

pubkey_init.restype = _error_code

756

757

pubkey_import = _library.gnutls_pubkey_import

758

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

759

x509_crt_fmt_t]

760

pubkey_import.restype = _error_code

761

762

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

763

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

764

ctypes.POINTER(ctypes.c_ubyte),

765

ctypes.POINTER(ctypes.c_size_t)]

766

pubkey_get_key_id.restype = _error_code

767

768

pubkey_deinit = _library.gnutls_pubkey_deinit

769

pubkey_deinit.argtypes = [pubkey_t]

770

pubkey_deinit.restype = None

771

else:

772

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

773

774

openpgp_crt_init = _library.gnutls_openpgp_crt_init

775

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

776

openpgp_crt_init.restype = _error_code

777

778

openpgp_crt_import = _library.gnutls_openpgp_crt_import

779

openpgp_crt_import.argtypes = [openpgp_crt_t,

780

ctypes.POINTER(datum_t),

781

openpgp_crt_fmt_t]

782

openpgp_crt_import.restype = _error_code

783

784

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

785

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

786

ctypes.POINTER(ctypes.c_uint)]

787

openpgp_crt_verify_self.restype = _error_code

788

789

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

790

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

791

openpgp_crt_deinit.restype = None

792

793

openpgp_crt_get_fingerprint = (

794

_library.gnutls_openpgp_crt_get_fingerprint)

795

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

796

ctypes.c_void_p,

797

ctypes.POINTER(

798

ctypes.c_size_t)]

799

openpgp_crt_get_fingerprint.restype = _error_code

800

801

if check_version(b"3.6.4"):

802

certificate_type_get2 = _library.gnutls_certificate_type_get2

803

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

804

certificate_type_get2.restype = _error_code

805

806

# Remove non-public functions

807

del _error_code, _retry_on_error

808

809

810

def call_pipe(connection, # : multiprocessing.Connection

811

func, *args, **kwargs):

812

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

813

814

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

815

return value on the provided multiprocessing.Connection.

816

"""

817

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

818

connection.close()

404

def timedelta_to_milliseconds(td):

405

"Convert a datetime.timedelta() to milliseconds"

406

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

407

+ (td.seconds * 1000)

408

+ (td.microseconds // 1000))

819

409

820

410

821

411

class Client(object):

822

412

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

823

413

824

414

Attributes:

825

415

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

826

416

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

827

417

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

828

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

829

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

830

running.

831

checker_callback_tag: a GLib event source tag, or None

418

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

419

to see if the client lives.

420

'None' if no process is running.

421

checker_callback_tag: a gobject event source tag, or None

832

422

checker_command: string; External command which is run to check

833

423

if client lives. %() expansions are done at

834

424

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

835

425

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

836

checker_initiator_tag: a GLib event source tag, or None

426

checker_initiator_tag: a gobject event source tag, or None

837

427

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

838

428

client_structure: Object describing what attributes a client has

839

429

and is used for storing the client at exit

840

430

current_checker_command: string; current running checker_command

841

disable_initiator_tag: a GLib event source tag, or None

431

disable_initiator_tag: a gobject event source tag, or None

842

432

enabled: bool()

843

433

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

844

uniquely identify an OpenPGP client

845

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

846

a client using raw public keys

434

uniquely identify the client

847

435

host: string; available for use by the checker command

848

436

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

849

437

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

851

439

last_checker_status: integer between 0 and 255 reflecting exit

852

440

status of last checker. -1 reflects crashed

853

441

checker, -2 means no checker completed yet.

854

last_checker_signal: The signal which killed the last checker, if

855

last_checker_status is -1

856

442

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

857

443

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

858

444

D-Bus identifiers

865

451

disabled, or None

866

452

server_settings: The server_settings dict from main()

867

453

"""

868

454

869

455

runtime_expansions = ("approval_delay", "approval_duration",

870

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

456

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

871

457

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

872

458

"last_approval_request", "last_checked_ok",

873

459

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

874

client_defaults = {

875

"timeout": "PT5M",

876

"extended_timeout": "PT15M",

877

"interval": "PT2M",

878

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

879

"host": "",

880

"approval_delay": "PT0S",

881

"approval_duration": "PT1S",

882

"approved_by_default": "True",

883

"enabled": "True",

884

}

885

460

client_defaults = { "timeout": "PT5M",

461

"extended_timeout": "PT15M",

462

"interval": "PT2M",

463

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

464

"host": "",

465

"approval_delay": "PT0S",

466

"approval_duration": "PT1S",

467

"approved_by_default": "True",

468

"enabled": "True",

469

}

470

471

def timeout_milliseconds(self):

472

"Return the 'timeout' attribute in milliseconds"

473

return timedelta_to_milliseconds(self.timeout)

474

475

def extended_timeout_milliseconds(self):

476

"Return the 'extended_timeout' attribute in milliseconds"

477

return timedelta_to_milliseconds(self.extended_timeout)

478

479

def interval_milliseconds(self):

480

"Return the 'interval' attribute in milliseconds"

481

return timedelta_to_milliseconds(self.interval)

482

483

def approval_delay_milliseconds(self):

484

return timedelta_to_milliseconds(self.approval_delay)

485

886

486

@staticmethod

887

487

def config_parser(config):

888

488

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

895

495

for client_name in config.sections():

896

496

section = dict(config.items(client_name))

897

497

client = settings[client_name] = {}

898

498

899

499

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

900

500

# Reformat values from string types to Python types

901

501

client["approved_by_default"] = config.getboolean(

902

502

client_name, "approved_by_default")

903

503

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

904

504

"enabled")

905

906

# Uppercase and remove spaces from key_id and fingerprint

907

# for later comparison purposes with return value from the

908

# key_id() and fingerprint() functions

909

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

910

.replace(" ", ""))

505

911

506

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

912

507

.replace(" ", ""))

913

508

if "secret" in section:

914

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

915

.encode("utf-8"),

916

"base64")

509

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

917

510

elif "secfile" in section:

918

511

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

919

512

(section["secfile"])),

920

513

"rb") as secfile:

921

514

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

922

515

else:

923

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

516

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

924

517

.format(section))

925

518

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

926

519

client["extended_timeout"] = string_to_delta(

934

527

client["last_approval_request"] = None

935

528

client["last_checked_ok"] = None

936

529

client["last_checker_status"] = -2

937

530

938

531

return settings

939

940

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

532

533

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

941

534

self.name = name

942

535

if server_settings is None:

943

536

server_settings = {}

944

537

self.server_settings = server_settings

945

538

# adding all client settings

946

for setting, value in settings.items():

539

for setting, value in settings.iteritems():

947

540

setattr(self, setting, value)

948

541

949

542

if self.enabled:

950

543

if not hasattr(self, "last_enabled"):

951

544

self.last_enabled = datetime.datetime.utcnow()

955

548

else:

956

549

self.last_enabled = None

957

550

self.expires = None

958

551

959

552

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

960

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

553

# Uppercase and remove spaces from fingerprint for later

554

# comparison purposes with return value from the fingerprint()

555

# function

961

556

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

962

557

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

963

558

datetime.datetime.utcnow())

964

559

965

560

# attributes specific for this server instance

966

561

self.checker = None

967

562

self.checker_initiator_tag = None

970

565

self.current_checker_command = None

971

566

self.approved = None

972

567

self.approvals_pending = 0

973

self.changedstate = multiprocessing_manager.Condition(

974

multiprocessing_manager.Lock())

975

self.client_structure = [attr

976

for attr in self.__dict__.keys()

568

self.changedstate = (multiprocessing_manager

569

.Condition(multiprocessing_manager

570

.Lock()))

571

self.client_structure = [attr for attr in

572

self.__dict__.iterkeys()

977

573

if not attr.startswith("_")]

978

574

self.client_structure.append("client_structure")

979

980

for name, t in inspect.getmembers(

981

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

575

576

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

577

lambda obj:

578

isinstance(obj,

579

property)):

982

580

if not name.startswith("_"):

983

581

self.client_structure.append(name)

984

582

985

583

# Send notice to process children that client state has changed

986

584

def send_changedstate(self):

987

585

with self.changedstate:

988

586

self.changedstate.notify_all()

989

587

990

588

def enable(self):

991

589

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

992

590

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

997

595

self.last_enabled = datetime.datetime.utcnow()

998

596

self.init_checker()

999

597

self.send_changedstate()

1000

598

1001

599

def disable(self, quiet=True):

1002

600

"""Disable this client."""

1003

601

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

1005

603

if not quiet:

1006

604

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

1007

605

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

1008

GLib.source_remove(self.disable_initiator_tag)

606

gobject.source_remove(self.disable_initiator_tag)

1009

607

self.disable_initiator_tag = None

1010

608

self.expires = None

1011

609

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

1012

GLib.source_remove(self.checker_initiator_tag)

610

gobject.source_remove(self.checker_initiator_tag)

1013

611

self.checker_initiator_tag = None

1014

612

self.stop_checker()

1015

613

self.enabled = False

1016

614

if not quiet:

1017

615

self.send_changedstate()

1018

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

616

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

1019

617

return False

1020

618

1021

619

def __del__(self):

1022

620

self.disable()

1023

621

1024

622

def init_checker(self):

1025

623

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

1026

624

# and every interval from then on.

1027

625

if self.checker_initiator_tag is not None:

1028

GLib.source_remove(self.checker_initiator_tag)

1029

self.checker_initiator_tag = GLib.timeout_add(

1030

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

1031

self.start_checker)

626

gobject.source_remove(self.checker_initiator_tag)

627

self.checker_initiator_tag = (gobject.timeout_add

628

(self.interval_milliseconds(),

629

self.start_checker))

1032

630

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

1033

631

if self.disable_initiator_tag is not None:

1034

GLib.source_remove(self.disable_initiator_tag)

1035

self.disable_initiator_tag = GLib.timeout_add(

1036

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

632

gobject.source_remove(self.disable_initiator_tag)

633

self.disable_initiator_tag = (gobject.timeout_add

634

(self.timeout_milliseconds(),

635

self.disable))

1037

636

# Also start a new checker *right now*.

1038

637

self.start_checker()

1039

1040

def checker_callback(self, source, condition, connection,

1041

command):

638

639

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

1042

640

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

1043

# Read return code from connection (see call_pipe)

1044

returncode = connection.recv()

1045

connection.close()

1046

self.checker.join()

1047

641

self.checker_callback_tag = None

1048

642

self.checker = None

1049

1050

if returncode >= 0:

1051

self.last_checker_status = returncode

1052

self.last_checker_signal = None

643

if os.WIFEXITED(condition):

644

self.last_checker_status = os.WEXITSTATUS(condition)

1053

645

if self.last_checker_status == 0:

1054

646

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

1055

647

vars(self))

1056

648

self.checked_ok()

1057

649

else:

1058

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

650

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

651

vars(self))

1059

652

else:

1060

653

self.last_checker_status = -1

1061

self.last_checker_signal = -returncode

1062

654

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

1063

655

vars(self))

1064

return False

1065

656

1066

657

def checked_ok(self):

1067

658

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

1068

659

self.last_checked_ok = datetime.datetime.utcnow()

1069

660

self.last_checker_status = 0

1070

self.last_checker_signal = None

1071

661

self.bump_timeout()

1072

662

1073

663

def bump_timeout(self, timeout=None):

1074

664

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

1075

665

if timeout is None:

1076

666

timeout = self.timeout

1077

667

if self.disable_initiator_tag is not None:

1078

GLib.source_remove(self.disable_initiator_tag)

668

gobject.source_remove(self.disable_initiator_tag)

1079

669

self.disable_initiator_tag = None

1080

670

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

1081

self.disable_initiator_tag = GLib.timeout_add(

1082

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

671

self.disable_initiator_tag = (gobject.timeout_add

672

(timedelta_to_milliseconds

673

(timeout), self.disable))

1083

674

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

1084

675

1085

676

def need_approval(self):

1086

677

self.last_approval_request = datetime.datetime.utcnow()

1087

678

1088

679

def start_checker(self):

1089

680

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

1090

681

1091

682

If a checker already exists, leave it running and do

1092

683

nothing."""

1093

684

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

1098

689

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

1099

690

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

1100

691

# should be.

1101

1102

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

1103

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

1104

self.checker.join()

1105

self.checker = None

692

693

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

694

try:

695

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

696

except AttributeError:

697

pass

698

except OSError as error:

699

if error.errno != errno.ECHILD:

700

raise

701

else:

702

if pid:

703

logger.warning("Checker was a zombie")

704

gobject.source_remove(self.checker_callback_tag)

705

self.checker_callback(pid, status,

706

self.current_checker_command)

1106

707

# Start a new checker if needed

1107

708

if self.checker is None:

1108

709

# Escape attributes for the shell

1109

escaped_attrs = {

1110

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

1111

for attr in self.runtime_expansions}

710

escaped_attrs = dict(

711

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

712

for attr in

713

self.runtime_expansions)

1112

714

try:

1113

715

command = self.checker_command % escaped_attrs

1114

716

except TypeError as error:

1115

717

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

1116

self.checker_command,

718

self.checker_command, exc_info=error)

719

return True # Try again later

720

self.current_checker_command = command

721

try:

722

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

723

command, self.name)

724

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

725

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

726

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

727

# always replaced by /dev/null.)

728

# The exception is when not debugging but nevertheless

729

# running in the foreground; use the previously

730

# created wnull.

731

popen_args = {}

732

if (not self.server_settings["debug"]

733

and self.server_settings["foreground"]):

734

popen_args.update({"stdout": wnull,

735

"stderr": wnull })

736

self.checker = subprocess.Popen(command,

737

close_fds=True,

738

shell=True, cwd="/",

739

**popen_args)

740

except OSError as error:

741

logger.error("Failed to start subprocess",

1117

742

exc_info=error)

1118

return True # Try again later

1119

self.current_checker_command = command

1120

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

1121

self.name)

1122

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

1123

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

1124

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

1125

# always replaced by /dev/null.)

1126

# The exception is when not debugging but nevertheless

1127

# running in the foreground; use the previously

1128

# created wnull.

1129

popen_args = {"close_fds": True,

1130

"shell": True,

1131

"cwd": "/"}

1132

if (not self.server_settings["debug"]

1133

and self.server_settings["foreground"]):

1134

popen_args.update({"stdout": wnull,

1135

"stderr": wnull})

1136

pipe = multiprocessing.Pipe(duplex=False)

1137

self.checker = multiprocessing.Process(

1138

target=call_pipe,

1139

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

1140

kwargs=popen_args)

1141

self.checker.start()

1142

self.checker_callback_tag = GLib.io_add_watch(

1143

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

1144

self.checker_callback, pipe[0], command)

1145

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

743

return True

744

self.checker_callback_tag = (gobject.child_watch_add

745

(self.checker.pid,

746

self.checker_callback,

747

data=command))

748

# The checker may have completed before the gobject

749

# watch was added. Check for this.

750

try:

751

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

752

except OSError as error:

753

if error.errno == errno.ECHILD:

754

# This should never happen

755

logger.error("Child process vanished",

756

exc_info=error)

757

return True

758

raise

759

if pid:

760

gobject.source_remove(self.checker_callback_tag)

761

self.checker_callback(pid, status, command)

762

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

1146

763

return True

1147

764

1148

765

def stop_checker(self):

1149

766

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

1150

767

if self.checker_callback_tag:

1151

GLib.source_remove(self.checker_callback_tag)

768

gobject.source_remove(self.checker_callback_tag)

1152

769

self.checker_callback_tag = None

1153

770

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

1154

771

return

1155

772

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

1156

self.checker.terminate()

773

try:

774

self.checker.terminate()

775

#time.sleep(0.5)

776

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

777

# self.checker.kill()

778

except OSError as error:

779

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

780

raise

1157

781

self.checker = None

1158

782

1159

783

1160

def dbus_service_property(dbus_interface,

1161

signature="v",

1162

access="readwrite",

1163

byte_arrays=False):

784

def dbus_service_property(dbus_interface, signature="v",

785

access="readwrite", byte_arrays=False):

1164

786

"""Decorators for marking methods of a DBusObjectWithProperties to

1165

787

become properties on the D-Bus.

1166

788

1167

789

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

1168

790

and with one argument by "Set".

1169

791

1170

792

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

1171

793

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

1172

794

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

1175

797

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

1176

798

if byte_arrays and signature != "ay":

1177

799

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

1178

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

1179

800

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

1180

801

def decorator(func):

1181

802

func._dbus_is_property = True

1182

803

func._dbus_interface = dbus_interface

1185

806

func._dbus_name = func.__name__

1186

807

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

1187

808

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

1188

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

809

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1189

810

return func

1190

1191

811

return decorator

1192

812

1193

813

1194

814

def dbus_interface_annotations(dbus_interface):

1195

815

"""Decorator for marking functions returning interface annotations

1196

816

1197

817

Usage:

1198

818

1199

819

@dbus_interface_annotations("org.example.Interface")

1200

820

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

1201

821

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

1202

822

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

1203

823

"false"}

1204

824

"""

1205

1206

825

def decorator(func):

1207

826

func._dbus_is_interface = True

1208

827

func._dbus_interface = dbus_interface

1209

828

func._dbus_name = dbus_interface

1210

829

return func

1211

1212

830

return decorator

1213

831

1214

832

1215

833

def dbus_annotations(annotations):

1216

834

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

1217

835

Usage:

1218

1219

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

1220

"org.freedesktop.DBus.Property."

1221

"EmitsChangedSignal": "false"})

836

1222

837

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

1223

838

access="r")

839

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

840

"org.freedesktop.DBus.Property."

841

"EmitsChangedSignal": "false"})

1224

842

def Property_dbus_property(self):

1225

843

return dbus.Boolean(False)

1226

1227

See also the DBusObjectWithAnnotations class.

1228

844

"""

1229

1230

845

def decorator(func):

1231

846

func._dbus_annotations = annotations

1232

847

return func

1233

1234

848

return decorator

1235

849

1236

850

1237

851

class DBusPropertyException(dbus.exceptions.DBusException):

1238

852

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

1239

853

"""

1240

pass

854

def __unicode__(self):

855

return unicode(str(self))

1241

856

1242

857

1243

858

class DBusPropertyAccessException(DBusPropertyException):

1252

867

pass

1253

868

1254

869

1255

class DBusObjectWithAnnotations(dbus.service.Object):

1256

"""A D-Bus object with annotations.

1257

1258

Classes inheriting from this can use the dbus_annotations

1259

decorator to add annotations to methods or signals.

870

class DBusObjectWithProperties(dbus.service.Object):

871

"""A D-Bus object with properties.

872

873

Classes inheriting from this can use the dbus_service_property

874

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

875

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

1260

876

"""

1261

877

1262

878

@staticmethod

1263

879

def _is_dbus_thing(thing):

1264

880

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

1265

881

1266

882

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

1267

883

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

1268

884

"""

1269

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

885

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

1270

886

False)

1271

887

1272

888

def _get_all_dbus_things(self, thing):

1273

889

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

1274

890

"""

1275

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

891

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

892

name),

1276

893

athing.__get__(self))

1277

894

for cls in self.__class__.__mro__

1278

895

for name, athing in

1279

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

1280

1281

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1282

out_signature="s",

1283

path_keyword='object_path',

1284

connection_keyword='connection')

1285

def Introspect(self, object_path, connection):

1286

"""Overloading of standard D-Bus method.

1287

1288

Inserts annotation tags on methods and signals.

1289

"""

1290

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

1291

connection)

1292

try:

1293

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

1294

1295

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

1296

# Add annotation tags

1297

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

1298

for tag in if_tag.getElementsByTagName(typ):

1299

annots = dict()

1300

for name, prop in (self.

1301

_get_all_dbus_things(typ)):

1302

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

1303

and prop._dbus_interface

1304

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

1305

annots.update(getattr(

1306

prop, "_dbus_annotations", {}))

1307

for name, value in annots.items():

1308

ann_tag = document.createElement(

1309

"annotation")

1310

ann_tag.setAttribute("name", name)

1311

ann_tag.setAttribute("value", value)

1312

tag.appendChild(ann_tag)

1313

# Add interface annotation tags

1314

for annotation, value in dict(

1315

itertools.chain.from_iterable(

1316

annotations().items()

1317

for name, annotations

1318

in self._get_all_dbus_things("interface")

1319

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

1320

)).items():

1321

ann_tag = document.createElement("annotation")

1322

ann_tag.setAttribute("name", annotation)

1323

ann_tag.setAttribute("value", value)

1324

if_tag.appendChild(ann_tag)

1325

# Fix argument name for the Introspect method itself

1326

if (if_tag.getAttribute("name")

1327

== dbus.INTROSPECTABLE_IFACE):

1328

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

1329

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

1330

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

1331

if (arg.getAttribute("direction")

1332

== "out"):

1333

arg.setAttribute("name",

1334

"xml_data")

1335

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

1336

document.unlink()

1337

except (AttributeError, xml.dom.DOMException,

1338

xml.parsers.expat.ExpatError) as error:

1339

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

1340

exc_info=error)

1341

return xmlstring

1342

1343

1344

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1345

"""A D-Bus object with properties.

1346

1347

Classes inheriting from this can use the dbus_service_property

1348

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

1349

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

1350

"""

1351

896

inspect.getmembers(cls,

897

self._is_dbus_thing(thing)))

898

1352

899

def _get_dbus_property(self, interface_name, property_name):

1353

900

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

1354

901

property with the specified name and interface.

1355

902

"""

1356

for cls in self.__class__.__mro__:

1357

for name, value in inspect.getmembers(

1358

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

903

for cls in self.__class__.__mro__:

904

for name, value in (inspect.getmembers

905

(cls,

906

self._is_dbus_thing("property"))):

1359

907

if (value._dbus_name == property_name

1360

908

and value._dbus_interface == interface_name):

1361

909

return value.__get__(self)

1362

910

1363

911

# No such property

1364

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

1365

self.dbus_object_path, interface_name, property_name))

1366

1367

@classmethod

1368

def _get_all_interface_names(cls):

1369

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

1370

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

1371

"_dbus_interface", None)

1372

for x in (inspect.getmro(cls))

1373

for attr in dir(x))

1374

if name is not None)

1375

1376

@dbus.service.method(dbus.PROPERTIES_IFACE,

1377

in_signature="ss",

912

raise DBusPropertyNotFound(self.dbus_object_path + ":"

913

+ interface_name + "."

914

+ property_name)

915

916

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

1378

917

out_signature="v")

1379

918

def Get(self, interface_name, property_name):

1380

919

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

1386

925

if not hasattr(value, "variant_level"):

1387

926

return value

1388

927

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

1389

928

1390

929

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

1391

930

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

1392

931

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

1399

938

# signatures other than "ay".

1400

939

if prop._dbus_signature != "ay":

1401

940

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

1402

"'ay' signature {!r}"

941

"'ay' signature {0!r}"

1403

942

.format(prop._dbus_signature))

1404

943

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

1405

944

for byte in value))

1406

945

prop(value)

1407

1408

@dbus.service.method(dbus.PROPERTIES_IFACE,

1409

in_signature="s",

946

947

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

1410

948

out_signature="a{sv}")

1411

949

def GetAll(self, interface_name):

1412

950

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

1413

951

standard.

1414

952

1415

953

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

1416

954

"""

1417

955

properties = {}

1427

965

if not hasattr(value, "variant_level"):

1428

966

properties[name] = value

1429

967

continue

1430

properties[name] = type(value)(

1431

value, variant_level=value.variant_level + 1)

968

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

969

value.variant_level+1)

1432

970

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

1433

1434

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

1435

def PropertiesChanged(self, interface_name, changed_properties,

1436

invalidated_properties):

1437

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

1438

standard.

1439

"""

1440

pass

1441

971

1442

972

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1443

973

out_signature="s",

1444

974

path_keyword='object_path',

1445

975

connection_keyword='connection')

1446

976

def Introspect(self, object_path, connection):

1447

977

"""Overloading of standard D-Bus method.

1448

978

1449

979

Inserts property tags and interface annotation tags.

1450

980

"""

1451

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1452

object_path,

1453

connection)

981

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

982

connection)

1454

983

try:

1455

984

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

1456

1457

985

def make_tag(document, name, prop):

1458

986

e = document.createElement("property")

1459

987

e.setAttribute("name", name)

1460

988

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

1461

989

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

1462

990

return e

1463

1464

991

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

1465

992

# Add property tags

1466

993

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

1469

996

if prop._dbus_interface

1470

997

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

1471

998

if_tag.appendChild(tag)

1472

# Add annotation tags for properties

1473

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

1474

annots = dict()

1475

for name, prop in self._get_all_dbus_things(

1476

"property"):

1477

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

1478

and prop._dbus_interface

1479

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

1480

annots.update(getattr(

1481

prop, "_dbus_annotations", {}))

1482

for name, value in annots.items():

1483

ann_tag = document.createElement(

1484

"annotation")

1485

ann_tag.setAttribute("name", name)

1486

ann_tag.setAttribute("value", value)

1487

tag.appendChild(ann_tag)

999

# Add annotation tags

1000

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

1001

for tag in if_tag.getElementsByTagName(typ):

1002

annots = dict()

1003

for name, prop in (self.

1004

_get_all_dbus_things(typ)):

1005

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

1006

and prop._dbus_interface

1007

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

1008

annots.update(getattr

1009

(prop,

1010

"_dbus_annotations",

1011

{}))

1012

for name, value in annots.iteritems():

1013

ann_tag = document.createElement(

1014

"annotation")

1015

ann_tag.setAttribute("name", name)

1016

ann_tag.setAttribute("value", value)

1017

tag.appendChild(ann_tag)

1018

# Add interface annotation tags

1019

for annotation, value in dict(

1020

itertools.chain.from_iterable(

1021

annotations().iteritems()

1022

for name, annotations in

1023

self._get_all_dbus_things("interface")

1024

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

1025

)).iteritems():

1026

ann_tag = document.createElement("annotation")

1027

ann_tag.setAttribute("name", annotation)

1028

ann_tag.setAttribute("value", value)

1029

if_tag.appendChild(ann_tag)

1488

1030

# Add the names to the return values for the

1489

1031

# "org.freedesktop.DBus.Properties" methods

1490

1032

if (if_tag.getAttribute("name")

1509

1051

return xmlstring

1510

1052

1511

1053

1512

try:

1513

dbus.OBJECT_MANAGER_IFACE

1514

except AttributeError:

1515

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

1516

1517

1518

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1519

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

1520

1521

Classes inheriting from this exposes the standard

1522

GetManagedObjects call and the InterfacesAdded and

1523

InterfacesRemoved signals on the standard

1524

"org.freedesktop.DBus.ObjectManager" interface.

1525

1526

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

1527

manually.

1528

"""

1529

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1530

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

1531

def GetManagedObjects(self):

1532

"""This function must be overridden"""

1533

raise NotImplementedError()

1534

1535

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1536

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

1537

def InterfacesAdded(self, object_path, interfaces_and_properties):

1538

pass

1539

1540

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

1541

def InterfacesRemoved(self, object_path, interfaces):

1542

pass

1543

1544

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1545

out_signature="s",

1546

path_keyword='object_path',

1547

connection_keyword='connection')

1548

def Introspect(self, object_path, connection):

1549

"""Overloading of standard D-Bus method.

1550

1551

Override return argument name of GetManagedObjects to be

1552

"objpath_interfaces_and_properties"

1553

"""

1554

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1555

object_path,

1556

connection)

1557

try:

1558

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

1559

1560

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

1561

# Fix argument name for the GetManagedObjects method

1562

if (if_tag.getAttribute("name")

1563

== dbus.OBJECT_MANAGER_IFACE):

1564

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

1565

if (cn.getAttribute("name")

1566

== "GetManagedObjects"):

1567

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

1568

if (arg.getAttribute("direction")

1569

== "out"):

1570

arg.setAttribute(

1571

"name",

1572

"objpath_interfaces"

1573

"_and_properties")

1574

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

1575

document.unlink()

1576

except (AttributeError, xml.dom.DOMException,

1577

xml.parsers.expat.ExpatError) as error:

1578

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

1579

exc_info=error)

1580

return xmlstring

1581

1582

1583

1054

def datetime_to_dbus(dt, variant_level=0):

1584

1055

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

1585

1056

if dt is None:

1586

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

1587

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

1057

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

1058

return dbus.String(dt.isoformat(),

1059

variant_level=variant_level)

1588

1060

1589

1061

1590

1062

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1592

1064

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

1593

1065

interface names according to the "alt_interface_names" mapping.

1594

1066

Usage:

1595

1067

1596

1068

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

1597

1069

"net.example.AlternateInterface"})

1598

1070

class SampleDBusObject(dbus.service.Object):

1599

1071

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

1600

1072

def SampleDBusMethod():

1601

1073

pass

1602

1074

1603

1075

The above "SampleDBusMethod" on "SampleDBusObject" will be

1604

1076

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

1605

1077

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

1606

1078

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

1607

1079

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

1608

1080

1609

1081

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

1610

1082

(from DBusObjectWithProperties) and interfaces (from the

1611

1083

dbus_interface_annotations decorator).

1612

1084

"""

1613

1614

1085

def wrapper(cls):

1615

1086

for orig_interface_name, alt_interface_name in (

1616

alt_interface_names.items()):

1087

alt_interface_names.iteritems()):

1617

1088

attr = {}

1618

1089

interface_names = set()

1619

1090

# Go though all attributes of the class

1621

1092

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

1622

1093

# with the wrong interface name

1623

1094

if (not hasattr(attribute, "_dbus_interface")

1624

or not attribute._dbus_interface.startswith(

1625

orig_interface_name)):

1095

or not attribute._dbus_interface

1096

.startswith(orig_interface_name)):

1626

1097

continue

1627

1098

# Create an alternate D-Bus interface name based on

1628

1099

# the current name

1629

alt_interface = attribute._dbus_interface.replace(

1630

orig_interface_name, alt_interface_name)

1100

alt_interface = (attribute._dbus_interface

1101

.replace(orig_interface_name,

1102

alt_interface_name))

1631

1103

interface_names.add(alt_interface)

1632

1104

# Is this a D-Bus signal?

1633

1105

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

1634

1106

# Extract the original non-method undecorated

1635

1107

# function by black magic

1636

if sys.version_info.major == 2:

1637

nonmethod_func = (dict(

1108

nonmethod_func = (dict(

1638

1109

zip(attribute.func_code.co_freevars,

1639

attribute.__closure__))

1640

["func"].cell_contents)

1641

else:

1642

nonmethod_func = (dict(

1643

zip(attribute.__code__.co_freevars,

1644

attribute.__closure__))

1645

["func"].cell_contents)

1110

attribute.__closure__))["func"]

1111

.cell_contents)

1646

1112

# Create a new, but exactly alike, function

1647

1113

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

1648

1114

# with the alternate D-Bus interface name

1649

new_function = copy_function(nonmethod_func)

1650

new_function = (dbus.service.signal(

1651

alt_interface,

1652

attribute._dbus_signature)(new_function))

1115

new_function = (dbus.service.signal

1116

(alt_interface,

1117

attribute._dbus_signature)

1118

(types.FunctionType(

1119

nonmethod_func.func_code,

1120

nonmethod_func.func_globals,

1121

nonmethod_func.func_name,

1122

nonmethod_func.func_defaults,

1123

nonmethod_func.func_closure)))

1653

1124

# Copy annotations, if any

1654

1125

try:

1655

new_function._dbus_annotations = dict(

1656

attribute._dbus_annotations)

1126

new_function._dbus_annotations = (

1127

dict(attribute._dbus_annotations))

1657

1128

except AttributeError:

1658

1129

pass

1659

1660

1130

# Define a creator of a function to call both the

1661

1131

# original and alternate functions, so both the

1662

1132

# original and alternate signals gets sent when

1665

1135

"""This function is a scope container to pass

1666

1136

func1 and func2 to the "call_both" function

1667

1137

outside of its arguments"""

1668

1669

@functools.wraps(func2)

1670

1138

def call_both(*args, **kwargs):

1671

1139

"""This function will emit two D-Bus

1672

1140

signals by calling func1 and func2"""

1673

1141

func1(*args, **kwargs)

1674

1142

func2(*args, **kwargs)

1675

# Make wrapper function look like a D-Bus

1676

# signal

1677

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

1678

if name.startswith("_dbus_"):

1679

setattr(call_both, name, attr)

1680

1681

1143

return call_both

1682

1144

# Create the "call_both" function and add it to

1683

1145

# the class

1688

1150

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

1689

1151

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

1690

1152

# to the class.

1691

attr[attrname] = (

1692

dbus.service.method(

1693

alt_interface,

1694

attribute._dbus_in_signature,

1695

attribute._dbus_out_signature)

1696

(copy_function(attribute)))

1153

attr[attrname] = (dbus.service.method

1154

(alt_interface,

1155

attribute._dbus_in_signature,

1156

attribute._dbus_out_signature)

1157

(types.FunctionType

1158

(attribute.func_code,

1159

attribute.func_globals,

1160

attribute.func_name,

1161

attribute.func_defaults,

1162

attribute.func_closure)))

1697

1163

# Copy annotations, if any

1698

1164

try:

1699

attr[attrname]._dbus_annotations = dict(

1700

attribute._dbus_annotations)

1165

attr[attrname]._dbus_annotations = (

1166

dict(attribute._dbus_annotations))

1701

1167

except AttributeError:

1702

1168

pass

1703

1169

# Is this a D-Bus property?

1706

1172

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

1707

1173

# property with the alternate D-Bus interface

1708

1174

# name. Add it to the class.

1709

attr[attrname] = (dbus_service_property(

1710

alt_interface, attribute._dbus_signature,

1711

attribute._dbus_access,

1712

attribute._dbus_get_args_options

1713

["byte_arrays"])

1714

(copy_function(attribute)))

1175

attr[attrname] = (dbus_service_property

1176

(alt_interface,

1177

attribute._dbus_signature,

1178

attribute._dbus_access,

1179

attribute

1180

._dbus_get_args_options

1181

["byte_arrays"])

1182

(types.FunctionType

1183

(attribute.func_code,

1184

attribute.func_globals,

1185

attribute.func_name,

1186

attribute.func_defaults,

1187

attribute.func_closure)))

1715

1188

# Copy annotations, if any

1716

1189

try:

1717

attr[attrname]._dbus_annotations = dict(

1718

attribute._dbus_annotations)

1190

attr[attrname]._dbus_annotations = (

1191

dict(attribute._dbus_annotations))

1719

1192

except AttributeError:

1720

1193

pass

1721

1194

# Is this a D-Bus interface?

1724

1197

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

1725

1198

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

1726

1199

# to the class.

1727

attr[attrname] = (

1728

dbus_interface_annotations(alt_interface)

1729

(copy_function(attribute)))

1200

attr[attrname] = (dbus_interface_annotations

1201

(alt_interface)

1202

(types.FunctionType

1203

(attribute.func_code,

1204

attribute.func_globals,

1205

attribute.func_name,

1206

attribute.func_defaults,

1207

attribute.func_closure)))

1730

1208

if deprecate:

1731

1209

# Deprecate all alternate interfaces

1732

iname = "_AlternateDBusNames_interface_annotation{}"

1210

iname="_AlternateDBusNames_interface_annotation{0}"

1733

1211

for interface_name in interface_names:

1734

1735

1212

@dbus_interface_annotations(interface_name)

1736

1213

def func(self):

1737

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

1738

"true"}

1214

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

1215

"true" }

1739

1216

# Find an unused name

1740

1217

for aname in (iname.format(i)

1741

1218

for i in itertools.count()):

1745

1222

if interface_names:

1746

1223

# Replace the class with a new subclass of it with

1747

1224

# methods, signals, etc. as created above.

1748

if sys.version_info.major == 2:

1749

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

1750

(cls, ), attr)

1751

else:

1752

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

1753

(cls, ), attr)

1225

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

1226

(cls,), attr)

1754

1227

return cls

1755

1756

1228

return wrapper

1757

1229

1758

1230

1759

1231

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

1760

"se.bsnet.fukt.Mandos"})

1232

"se.bsnet.fukt.Mandos"})

1761

1233

class ClientDBus(Client, DBusObjectWithProperties):

1762

1234

"""A Client class using D-Bus

1763

1235

1764

1236

Attributes:

1765

1237

dbus_object_path: dbus.ObjectPath

1766

1238

bus: dbus.SystemBus()

1767

1239

"""

1768

1240

1769

1241

runtime_expansions = (Client.runtime_expansions

1770

+ ("dbus_object_path", ))

1771

1772

_interface = "se.recompile.Mandos.Client"

1773

1242

+ ("dbus_object_path",))

1243

1774

1244

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

1775

1776

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

1245

1246

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

1777

1247

self.bus = bus

1778

1248

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

1779

1249

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

1780

1250

# the D-Bus

1781

client_object_name = str(self.name).translate(

1251

client_object_name = unicode(self.name).translate(

1782

1252

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

1783

1253

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

1784

self.dbus_object_path = dbus.ObjectPath(

1785

"/clients/" + client_object_name)

1254

self.dbus_object_path = (dbus.ObjectPath

1255

("/clients/" + client_object_name))

1786

1256

DBusObjectWithProperties.__init__(self, self.bus,

1787

1257

self.dbus_object_path)

1788

1789

def notifychangeproperty(transform_func, dbus_name,

1790

type_func=lambda x: x,

1791

variant_level=1,

1792

invalidate_only=False,

1793

_interface=_interface):

1258

1259

def notifychangeproperty(transform_func,

1260

dbus_name, type_func=lambda x: x,

1261

variant_level=1):

1794

1262

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

1795

1263

its changes to DBus.

1796

1264

1797

1265

transform_fun: Function that takes a value and a variant_level

1798

1266

and transforms it to a D-Bus type.

1799

1267

dbus_name: D-Bus name of the variable

1801

1269

to the D-Bus. Default: no transform

1802

1270

variant_level: D-Bus variant level. Default: 1

1803

1271

"""

1804

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

1805

1272

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

1806

1273

def setter(self, value):

1807

1274

if hasattr(self, "dbus_object_path"):

1808

1275

if (not hasattr(self, attrname) or

1809

1276

type_func(getattr(self, attrname, None))

1810

1277

!= type_func(value)):

1811

if invalidate_only:

1812

self.PropertiesChanged(

1813

_interface, dbus.Dictionary(),

1814

dbus.Array((dbus_name, )))

1815

else:

1816

dbus_value = transform_func(

1817

type_func(value),

1818

variant_level=variant_level)

1819

self.PropertyChanged(dbus.String(dbus_name),

1820

dbus_value)

1821

self.PropertiesChanged(

1822

_interface,

1823

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

1824

dbus_value}),

1825

dbus.Array())

1278

dbus_value = transform_func(type_func(value),

1279

variant_level

1280

=variant_level)

1281

self.PropertyChanged(dbus.String(dbus_name),

1282

dbus_value)

1826

1283

setattr(self, attrname, value)

1827

1284

1828

1285

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

1829

1286

1830

1287

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1831

1288

approvals_pending = notifychangeproperty(dbus.Boolean,

1832

1289

"ApprovalPending",

1833

type_func=bool)

1290

type_func = bool)

1834

1291

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

1835

1292

last_enabled = notifychangeproperty(datetime_to_dbus,

1836

1293

"LastEnabled")

1837

checker = notifychangeproperty(

1838

dbus.Boolean, "CheckerRunning",

1839

type_func=lambda checker: checker is not None)

1294

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

1295

type_func = lambda checker:

1296

checker is not None)

1840

1297

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1841

1298

"LastCheckedOK")

1842

1299

last_checker_status = notifychangeproperty(dbus.Int16,

1845

1302

datetime_to_dbus, "LastApprovalRequest")

1846

1303

approved_by_default = notifychangeproperty(dbus.Boolean,

1847

1304

"ApprovedByDefault")

1848

approval_delay = notifychangeproperty(

1849

dbus.UInt64, "ApprovalDelay",

1850

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

1305

approval_delay = notifychangeproperty(dbus.UInt64,

1306

"ApprovalDelay",

1307

type_func =

1308

timedelta_to_milliseconds)

1851

1309

approval_duration = notifychangeproperty(

1852

1310

dbus.UInt64, "ApprovalDuration",

1853

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

1311

type_func = timedelta_to_milliseconds)

1854

1312

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

1855

timeout = notifychangeproperty(

1856

dbus.UInt64, "Timeout",

1857

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

1313

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

1314

type_func =

1315

timedelta_to_milliseconds)

1858

1316

extended_timeout = notifychangeproperty(

1859

1317

dbus.UInt64, "ExtendedTimeout",

1860

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

1861

interval = notifychangeproperty(

1862

dbus.UInt64, "Interval",

1863

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

1318

type_func = timedelta_to_milliseconds)

1319

interval = notifychangeproperty(dbus.UInt64,

1320

"Interval",

1321

type_func =

1322

timedelta_to_milliseconds)

1864

1323

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

1865

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

1866

invalidate_only=True)

1867

1324

1868

1325

del notifychangeproperty

1869

1326

1870

1327

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

1871

1328

try:

1872

1329

self.remove_from_connection()

1875

1332

if hasattr(DBusObjectWithProperties, "__del__"):

1876

1333

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

1877

1334

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

1878

1879

def checker_callback(self, source, condition,

1880

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

1881

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

1882

connection, command, *args,

1883

**kwargs)

1884

exitstatus = self.last_checker_status

1885

if exitstatus >= 0:

1335

1336

def checker_callback(self, pid, condition, command,

1337

*args, **kwargs):

1338

self.checker_callback_tag = None

1339

self.checker = None

1340

if os.WIFEXITED(condition):

1341

exitstatus = os.WEXITSTATUS(condition)

1886

1342

# Emit D-Bus signal

1887

1343

self.CheckerCompleted(dbus.Int16(exitstatus),

1888

# This is specific to GNU libC

1889

dbus.Int64(exitstatus << 8),

1344

dbus.Int64(condition),

1890

1345

dbus.String(command))

1891

1346

else:

1892

1347

# Emit D-Bus signal

1893

1348

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

1894

dbus.Int64(

1895

# This is specific to GNU libC

1896

(exitstatus << 8)

1897

| self.last_checker_signal),

1349

dbus.Int64(condition),

1898

1350

dbus.String(command))

1899

return ret

1900

1351

1352

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

1353

*args, **kwargs)

1354

1901

1355

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

1902

1356

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

1903

1357

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

1907

1361

# Emit D-Bus signal

1908

1362

self.CheckerStarted(self.current_checker_command)

1909

1363

return r

1910

1364

1911

1365

def _reset_approved(self):

1912

1366

self.approved = None

1913

1367

return False

1914

1368

1915

1369

def approve(self, value=True):

1916

1370

self.approved = value

1917

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

1918

* 1000), self._reset_approved)

1371

gobject.timeout_add(timedelta_to_milliseconds

1372

(self.approval_duration),

1373

self._reset_approved)

1919

1374

self.send_changedstate()

1920

1921

# D-Bus methods, signals & properties

1922

1923

# Interfaces

1924

1925

# Signals

1926

1375

1376

## D-Bus methods, signals & properties

1377

_interface = "se.recompile.Mandos.Client"

1378

1379

## Interfaces

1380

1381

@dbus_interface_annotations(_interface)

1382

def _foo(self):

1383

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

1384

"false"}

1385

1386

## Signals

1387

1927

1388

# CheckerCompleted - signal

1928

1389

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

1929

1390

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

1930

1391

"D-Bus signal"

1931

1392

pass

1932

1393

1933

1394

# CheckerStarted - signal

1934

1395

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

1935

1396

def CheckerStarted(self, command):

1936

1397

"D-Bus signal"

1937

1398

pass

1938

1399

1939

1400

# PropertyChanged - signal

1940

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

1941

1401

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

1942

1402

def PropertyChanged(self, property, value):

1943

1403

"D-Bus signal"

1944

1404

pass

1945

1405

1946

1406

# GotSecret - signal

1947

1407

@dbus.service.signal(_interface)

1948

1408

def GotSecret(self):

1951

1411

server to mandos-client

1952

1412

"""

1953

1413

pass

1954

1414

1955

1415

# Rejected - signal

1956

1416

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

1957

1417

def Rejected(self, reason):

1958

1418

"D-Bus signal"

1959

1419

pass

1960

1420

1961

1421

# NeedApproval - signal

1962

1422

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

1963

1423

def NeedApproval(self, timeout, default):

1964

1424

"D-Bus signal"

1965

1425

return self.need_approval()

1966

1967

# Methods

1968

1426

1427

## Methods

1428

1969

1429

# Approve - method

1970

1430

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

1971

1431

def Approve(self, value):

1972

1432

self.approve(value)

1973

1433

1974

1434

# CheckedOK - method

1975

1435

@dbus.service.method(_interface)

1976

1436

def CheckedOK(self):

1977

1437

self.checked_ok()

1978

1438

1979

1439

# Enable - method

1980

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

1981

1440

@dbus.service.method(_interface)

1982

1441

def Enable(self):

1983

1442

"D-Bus method"

1984

1443

self.enable()

1985

1444

1986

1445

# StartChecker - method

1987

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

1988

1446

@dbus.service.method(_interface)

1989

1447

def StartChecker(self):

1990

1448

"D-Bus method"

1991

1449

self.start_checker()

1992

1450

1993

1451

# Disable - method

1994

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

1995

1452

@dbus.service.method(_interface)

1996

1453

def Disable(self):

1997

1454

"D-Bus method"

1998

1455

self.disable()

1999

1456

2000

1457

# StopChecker - method

2001

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

2002

1458

@dbus.service.method(_interface)

2003

1459

def StopChecker(self):

2004

1460

self.stop_checker()

2005

2006

# Properties

2007

1461

1462

## Properties

1463

2008

1464

# ApprovalPending - property

2009

1465

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

2010

1466

def ApprovalPending_dbus_property(self):

2011

1467

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

2012

1468

2013

1469

# ApprovedByDefault - property

2014

@dbus_service_property(_interface,

2015

signature="b",

1470

@dbus_service_property(_interface, signature="b",

2016

1471

access="readwrite")

2017

1472

def ApprovedByDefault_dbus_property(self, value=None):

2018

1473

if value is None: # get

2019

1474

return dbus.Boolean(self.approved_by_default)

2020

1475

self.approved_by_default = bool(value)

2021

1476

2022

1477

# ApprovalDelay - property

2023

@dbus_service_property(_interface,

2024

signature="t",

1478

@dbus_service_property(_interface, signature="t",

2025

1479

access="readwrite")

2026

1480

def ApprovalDelay_dbus_property(self, value=None):

2027

1481

if value is None: # get

2028

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

2029

* 1000)

1482

return dbus.UInt64(self.approval_delay_milliseconds())

2030

1483

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

2031

1484

2032

1485

# ApprovalDuration - property

2033

@dbus_service_property(_interface,

2034

signature="t",

1486

@dbus_service_property(_interface, signature="t",

2035

1487

access="readwrite")

2036

1488

def ApprovalDuration_dbus_property(self, value=None):

2037

1489

if value is None: # get

2038

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

2039

* 1000)

1490

return dbus.UInt64(timedelta_to_milliseconds(

1491

self.approval_duration))

2040

1492

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

2041

1493

2042

1494

# Name - property

2043

@dbus_annotations(

2044

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

2045

1495

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

2046

1496

def Name_dbus_property(self):

2047

1497

return dbus.String(self.name)

2048

2049

# KeyID - property

2050

@dbus_annotations(

2051

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

2052

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

2053

def KeyID_dbus_property(self):

2054

return dbus.String(self.key_id)

2055

1498

2056

1499

# Fingerprint - property

2057

@dbus_annotations(

2058

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

2059

1500

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

2060

1501

def Fingerprint_dbus_property(self):

2061

1502

return dbus.String(self.fingerprint)

2062

1503

2063

1504

# Host - property

2064

@dbus_service_property(_interface,

2065

signature="s",

1505

@dbus_service_property(_interface, signature="s",

2066

1506

access="readwrite")

2067

1507

def Host_dbus_property(self, value=None):

2068

1508

if value is None: # get

2069

1509

return dbus.String(self.host)

2070

self.host = str(value)

2071

1510

self.host = unicode(value)

1511

2072

1512

# Created - property

2073

@dbus_annotations(

2074

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

2075

1513

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

2076

1514

def Created_dbus_property(self):

2077

1515

return datetime_to_dbus(self.created)

2078

1516

2079

1517

# LastEnabled - property

2080

1518

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

2081

1519

def LastEnabled_dbus_property(self):

2082

1520

return datetime_to_dbus(self.last_enabled)

2083

1521

2084

1522

# Enabled - property

2085

@dbus_service_property(_interface,

2086

signature="b",

1523

@dbus_service_property(_interface, signature="b",

2087

1524

access="readwrite")

2088

1525

def Enabled_dbus_property(self, value=None):

2089

1526

if value is None: # get

2092

1529

self.enable()

2093

1530

else:

2094

1531

self.disable()

2095

1532

2096

1533

# LastCheckedOK - property

2097

@dbus_service_property(_interface,

2098

signature="s",

1534

@dbus_service_property(_interface, signature="s",

2099

1535

access="readwrite")

2100

1536

def LastCheckedOK_dbus_property(self, value=None):

2101

1537

if value is not None:

2102

1538

self.checked_ok()

2103

1539

return

2104

1540

return datetime_to_dbus(self.last_checked_ok)

2105

1541

2106

1542

# LastCheckerStatus - property

2107

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

1543

@dbus_service_property(_interface, signature="n",

1544

access="read")

2108

1545

def LastCheckerStatus_dbus_property(self):

2109

1546

return dbus.Int16(self.last_checker_status)

2110

1547

2111

1548

# Expires - property

2112

1549

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

2113

1550

def Expires_dbus_property(self):

2114

1551

return datetime_to_dbus(self.expires)

2115

1552

2116

1553

# LastApprovalRequest - property

2117

1554

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

2118

1555

def LastApprovalRequest_dbus_property(self):

2119

1556

return datetime_to_dbus(self.last_approval_request)

2120

1557

2121

1558

# Timeout - property

2122

@dbus_service_property(_interface,

2123

signature="t",

1559

@dbus_service_property(_interface, signature="t",

2124

1560

access="readwrite")

2125

1561

def Timeout_dbus_property(self, value=None):

2126

1562

if value is None: # get

2127

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

1563

return dbus.UInt64(self.timeout_milliseconds())

2128

1564

old_timeout = self.timeout

2129

1565

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

2130

1566

# Reschedule disabling

2138

1574

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

2139

1575

is None):

2140

1576

return

2141

GLib.source_remove(self.disable_initiator_tag)

2142

self.disable_initiator_tag = GLib.timeout_add(

2143

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

2144

self.disable)

2145

1577

gobject.source_remove(self.disable_initiator_tag)

1578

self.disable_initiator_tag = (

1579

gobject.timeout_add(

1580

timedelta_to_milliseconds(self.expires - now),

1581

self.disable))

1582

2146

1583

# ExtendedTimeout - property

2147

@dbus_service_property(_interface,

2148

signature="t",

1584

@dbus_service_property(_interface, signature="t",

2149

1585

access="readwrite")

2150

1586

def ExtendedTimeout_dbus_property(self, value=None):

2151

1587

if value is None: # get

2152

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

2153

* 1000)

1588

return dbus.UInt64(self.extended_timeout_milliseconds())

2154

1589

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

2155

1590

2156

1591

# Interval - property

2157

@dbus_service_property(_interface,

2158

signature="t",

1592

@dbus_service_property(_interface, signature="t",

2159

1593

access="readwrite")

2160

1594

def Interval_dbus_property(self, value=None):

2161

1595

if value is None: # get

2162

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

1596

return dbus.UInt64(self.interval_milliseconds())

2163

1597

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

2164

1598

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

2165

1599

return

2166

1600

if self.enabled:

2167

1601

# Reschedule checker run

2168

GLib.source_remove(self.checker_initiator_tag)

2169

self.checker_initiator_tag = GLib.timeout_add(

2170

value, self.start_checker)

2171

self.start_checker() # Start one now, too

2172

1602

gobject.source_remove(self.checker_initiator_tag)

1603

self.checker_initiator_tag = (gobject.timeout_add

1604

(value, self.start_checker))

1605

self.start_checker() # Start one now, too

1606

2173

1607

# Checker - property

2174

@dbus_service_property(_interface,

2175

signature="s",

1608

@dbus_service_property(_interface, signature="s",

2176

1609

access="readwrite")

2177

1610

def Checker_dbus_property(self, value=None):

2178

1611

if value is None: # get

2179

1612

return dbus.String(self.checker_command)

2180

self.checker_command = str(value)

2181

1613

self.checker_command = unicode(value)

1614

2182

1615

# CheckerRunning - property

2183

@dbus_service_property(_interface,

2184

signature="b",

1616

@dbus_service_property(_interface, signature="b",

2185

1617

access="readwrite")

2186

1618

def CheckerRunning_dbus_property(self, value=None):

2187

1619

if value is None: # get

2190

1622

self.start_checker()

2191

1623

else:

2192

1624

self.stop_checker()

2193

1625

2194

1626

# ObjectPath - property

2195

@dbus_annotations(

2196

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

2197

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

2198

1627

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

2199

1628

def ObjectPath_dbus_property(self):

2200

return self.dbus_object_path # is already a dbus.ObjectPath

2201

1629

return self.dbus_object_path # is already a dbus.ObjectPath

1630

2202

1631

# Secret = property

2203

@dbus_annotations(

2204

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

2205

"invalidates"})

2206

@dbus_service_property(_interface,

2207

signature="ay",

2208

access="write",

2209

byte_arrays=True)

1632

@dbus_service_property(_interface, signature="ay",

1633

access="write", byte_arrays=True)

2210

1634

def Secret_dbus_property(self, value):

2211

self.secret = bytes(value)

2212

1635

self.secret = str(value)

1636

2213

1637

del _interface

2214

1638

2215

1639

2216

1640

class ProxyClient(object):

2217

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

1641

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

2218

1642

self._pipe = child_pipe

2219

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

1643

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

2220

1644

if not self._pipe.recv():

2221

raise KeyError(key_id or fpr)

2222

1645

raise KeyError()

1646

2223

1647

def __getattribute__(self, name):

2224

1648

if name == '_pipe':

2225

1649

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

2228

1652

if data[0] == 'data':

2229

1653

return data[1]

2230

1654

if data[0] == 'function':

2231

2232

1655

def func(*args, **kwargs):

2233

1656

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

2234

1657

return self._pipe.recv()[1]

2235

2236

1658

return func

2237

1659

2238

1660

def __setattr__(self, name, value):

2239

1661

if name == '_pipe':

2240

1662

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

2243

1665

2244

1666

class ClientHandler(socketserver.BaseRequestHandler, object):

2245

1667

"""A class to handle client connections.

2246

1668

2247

1669

Instantiated once for each connection to handle it.

2248

1670

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

2249

1671

2250

1672

def handle(self):

2251

1673

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

2252

1674

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

2253

str(self.client_address))

1675

unicode(self.client_address))

2254

1676

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

2255

1677

self.server.child_pipe.fileno())

2256

2257

session = gnutls.ClientSession(self.request)

2258

2259

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

2260

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

2261

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

2262

# "+DHE-DSS"))

1678

1679

session = (gnutls.connection

1680

.ClientSession(self.request,

1681

gnutls.connection

1682

.X509Credentials()))

1683

1684

# Note: gnutls.connection.X509Credentials is really a

1685

# generic GnuTLS certificate credentials object so long as

1686

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

1687

# here despite using OpenPGP certificates.

1688

1689

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

1690

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

1691

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

1692

# "+DHE-DSS"))

2263

1693

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

2264

1694

priority = self.server.gnutls_priority

2265

1695

if priority is None:

2266

1696

priority = "NORMAL"

2267

gnutls.priority_set_direct(session._c_object,

2268

priority.encode("utf-8"),

2269

None)

2270

1697

(gnutls.library.functions

1698

.gnutls_priority_set_direct(session._c_object,

1699

priority, None))

1700

2271

1701

# Start communication using the Mandos protocol

2272

1702

# Get protocol number

2273

1703

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

2278

1708

except (ValueError, IndexError, RuntimeError) as error:

2279

1709

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

2280

1710

return

2281

1711

2282

1712

# Start GnuTLS connection

2283

1713

try:

2284

1714

session.handshake()

2285

except gnutls.Error as error:

1715

except gnutls.errors.GNUTLSError as error:

2286

1716

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

2287

1717

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

2288

1718

# established. Just abandon the request.

2289

1719

return

2290

1720

logger.debug("Handshake succeeded")

2291

1721

2292

1722

approval_required = False

2293

1723

try:

2294

if gnutls.has_rawpk:

2295

fpr = b""

2296

try:

2297

key_id = self.key_id(

2298

self.peer_certificate(session))

2299

except (TypeError, gnutls.Error) as error:

2300

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

2301

return

2302

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

2303

2304

else:

2305

key_id = b""

2306

try:

2307

fpr = self.fingerprint(

2308

self.peer_certificate(session))

2309

except (TypeError, gnutls.Error) as error:

2310

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

2311

return

2312

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

2313

2314

try:

2315

client = ProxyClient(child_pipe, key_id, fpr,

1724

try:

1725

fpr = self.fingerprint(self.peer_certificate

1726

(session))

1727

except (TypeError,

1728

gnutls.errors.GNUTLSError) as error:

1729

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

1730

return

1731

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

1732

1733

try:

1734

client = ProxyClient(child_pipe, fpr,

2316

1735

self.client_address)

2317

1736

except KeyError:

2318

1737

return

2319

1738

2320

1739

if client.approval_delay:

2321

1740

delay = client.approval_delay

2322

1741

client.approvals_pending += 1

2323

1742

approval_required = True

2324

1743

2325

1744

while True:

2326

1745

if not client.enabled:

2327

1746

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

2328

client.name)

1747

client.name)

2329

1748

if self.server.use_dbus:

2330

1749

# Emit D-Bus signal

2331

1750

client.Rejected("Disabled")

2332

1751

return

2333

1752

2334

1753

if client.approved or not client.approval_delay:

2335

# We are approved or approval is disabled

1754

#We are approved or approval is disabled

2336

1755

break

2337

1756

elif client.approved is None:

2338

1757

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

2340

1759

if self.server.use_dbus:

2341

1760

# Emit D-Bus signal

2342

1761

client.NeedApproval(

2343

client.approval_delay.total_seconds()

2344

* 1000, client.approved_by_default)

1762

client.approval_delay_milliseconds(),

1763

client.approved_by_default)

2345

1764

else:

2346

1765

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

2347

1766

client.name)

2349

1768

# Emit D-Bus signal

2350

1769

client.Rejected("Denied")

2351

1770

return

2352

2353

# wait until timeout or approved

1771

1772

#wait until timeout or approved

2354

1773

time = datetime.datetime.now()

2355

1774

client.changedstate.acquire()

2356

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

1775

client.changedstate.wait(

1776

float(timedelta_to_milliseconds(delay)

1777

/ 1000))

2357

1778

client.changedstate.release()

2358

1779

time2 = datetime.datetime.now()

2359

1780

if (time2 - time) >= delay:

2369

1790

break

2370

1791

else:

2371

1792

delay -= time2 - time

2372

2373

try:

2374

session.send(client.secret)

2375

except gnutls.Error as error:

2376

logger.warning("gnutls send failed",

2377

exc_info=error)

2378

return

2379

1793

1794

sent_size = 0

1795

while sent_size < len(client.secret):

1796

try:

1797

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

1798

except gnutls.errors.GNUTLSError as error:

1799

logger.warning("gnutls send failed",

1800

exc_info=error)

1801

return

1802

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

1803

sent, len(client.secret)

1804

- (sent_size + sent))

1805

sent_size += sent

1806

2380

1807

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

2381

1808

# bump the timeout using extended_timeout

2382

1809

client.bump_timeout(client.extended_timeout)

2383

1810

if self.server.use_dbus:

2384

1811

# Emit D-Bus signal

2385

1812

client.GotSecret()

2386

1813

2387

1814

finally:

2388

1815

if approval_required:

2389

1816

client.approvals_pending -= 1

2390

1817

try:

2391

1818

session.bye()

2392

except gnutls.Error as error:

1819

except gnutls.errors.GNUTLSError as error:

2393

1820

logger.warning("GnuTLS bye failed",

2394

1821

exc_info=error)

2395

1822

2396

1823

@staticmethod

2397

1824

def peer_certificate(session):

2398

"Return the peer's certificate as a bytestring"

2399

try:

2400

cert_type = gnutls.certificate_type_get2(session._c_object,

2401

gnutls.CTYPE_PEERS)

2402

except AttributeError:

2403

cert_type = gnutls.certificate_type_get(session._c_object)

2404

if gnutls.has_rawpk:

2405

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2406

else:

2407

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2408

# If not a valid certificate type...

2409

if cert_type not in valid_cert_types:

2410

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

2411

valid_cert_types)

2412

# ...return invalid data

2413

return b""

1825

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

1826

# If not an OpenPGP certificate...

1827

if (gnutls.library.functions

1828

.gnutls_certificate_type_get(session._c_object)

1829

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1830

# ...do the normal thing

1831

return session.peer_certificate

2414

1832

list_size = ctypes.c_uint(1)

2415

cert_list = (gnutls.certificate_get_peers

1833

cert_list = (gnutls.library.functions

1834

.gnutls_certificate_get_peers

2416

1835

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

2417

1836

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

2418

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

1837

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

1838

" certificate")

2419

1839

if list_size.value == 0:

2420

1840

return None

2421

1841

cert = cert_list[0]

2422

1842

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

2423

2424

@staticmethod

2425

def key_id(certificate):

2426

"Convert a certificate bytestring to a hexdigit key ID"

2427

# New GnuTLS "datum" with the public key

2428

datum = gnutls.datum_t(

2429

ctypes.cast(ctypes.c_char_p(certificate),

2430

ctypes.POINTER(ctypes.c_ubyte)),

2431

ctypes.c_uint(len(certificate)))

2432

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

2433

# New empty GnuTLS certificate

2434

pubkey = gnutls.pubkey_t()

2435

gnutls.pubkey_init(ctypes.byref(pubkey))

2436

# Import the raw public key into the certificate

2437

gnutls.pubkey_import(pubkey,

2438

ctypes.byref(datum),

2439

gnutls.X509_FMT_DER)

2440

# New buffer for the key ID

2441

buf = ctypes.create_string_buffer(32)

2442

buf_len = ctypes.c_size_t(len(buf))

2443

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

2444

gnutls.pubkey_get_key_id(pubkey,

2445

gnutls.KEYID_USE_SHA256,

2446

ctypes.cast(ctypes.byref(buf),

2447

ctypes.POINTER(ctypes.c_ubyte)),

2448

ctypes.byref(buf_len))

2449

# Deinit the certificate

2450

gnutls.pubkey_deinit(pubkey)

2451

2452

# Convert the buffer to a Python bytestring

2453

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

2454

# Convert the bytestring to hexadecimal notation

2455

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

2456

return hex_key_id

2457

1843

2458

1844

@staticmethod

2459

1845

def fingerprint(openpgp):

2460

1846

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2461

1847

# New GnuTLS "datum" with the OpenPGP public key

2462

datum = gnutls.datum_t(

2463

ctypes.cast(ctypes.c_char_p(openpgp),

2464

ctypes.POINTER(ctypes.c_ubyte)),

2465

ctypes.c_uint(len(openpgp)))

1848

datum = (gnutls.library.types

1849

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

1850

ctypes.POINTER

1851

(ctypes.c_ubyte)),

1852

ctypes.c_uint(len(openpgp))))

2466

1853

# New empty GnuTLS certificate

2467

crt = gnutls.openpgp_crt_t()

2468

gnutls.openpgp_crt_init(ctypes.byref(crt))

1854

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1855

(gnutls.library.functions

1856

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2469

1857

# Import the OpenPGP public key into the certificate

2470

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

2471

gnutls.OPENPGP_FMT_RAW)

1858

(gnutls.library.functions

1859

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

1860

gnutls.library.constants

1861

.GNUTLS_OPENPGP_FMT_RAW))

2472

1862

# Verify the self signature in the key

2473

1863

crtverify = ctypes.c_uint()

2474

gnutls.openpgp_crt_verify_self(crt, 0,

2475

ctypes.byref(crtverify))

1864

(gnutls.library.functions

1865

.gnutls_openpgp_crt_verify_self(crt, 0,

1866

ctypes.byref(crtverify)))

2476

1867

if crtverify.value != 0:

2477

gnutls.openpgp_crt_deinit(crt)

2478

raise gnutls.CertificateSecurityError(code

2479

=crtverify.value)

1868

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1869

raise (gnutls.errors.CertificateSecurityError

1870

("Verify failed"))

2480

1871

# New buffer for the fingerprint

2481

1872

buf = ctypes.create_string_buffer(20)

2482

1873

buf_len = ctypes.c_size_t()

2483

1874

# Get the fingerprint from the certificate into the buffer

2484

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

2485

ctypes.byref(buf_len))

1875

(gnutls.library.functions

1876

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

1877

ctypes.byref(buf_len)))

2486

1878

# Deinit the certificate

2487

gnutls.openpgp_crt_deinit(crt)

1879

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2488

1880

# Convert the buffer to a Python bytestring

2489

1881

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

2490

1882

# Convert the bytestring to hexadecimal notation

2494

1886

2495

1887

class MultiprocessingMixIn(object):

2496

1888

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

2497

2498

1889

def sub_process_main(self, request, address):

2499

1890

try:

2500

1891

self.finish_request(request, address)

2501

1892

except Exception:

2502

1893

self.handle_error(request, address)

2503

1894

self.close_request(request)

2504

1895

2505

1896

def process_request(self, request, address):

2506

1897

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

2507

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

2508

args=(request, address))

1898

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

1899

args = (request, address))

2509

1900

proc.start()

2510

1901

return proc

2511

1902

2512

1903

2513

1904

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2514

1905

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

2515

2516

1906

def process_request(self, request, client_address):

2517

1907

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

2518

1908

2519

1909

This function creates a new pipe in self.pipe

2520

1910

"""

2521

1911

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2522

1912

2523

1913

proc = MultiprocessingMixIn.process_request(self, request,

2524

1914

client_address)

2525

1915

self.child_pipe.close()

2526

1916

self.add_pipe(parent_pipe, proc)

2527

1917

2528

1918

def add_pipe(self, parent_pipe, proc):

2529

1919

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

2530

1920

raise NotImplementedError()

2533

1923

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2534

1924

socketserver.TCPServer, object):

2535

1925

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

2536

1926

2537

1927

Attributes:

2538

1928

enabled: Boolean; whether this server is activated yet

2539

1929

interface: None or a network interface name (string)

2540

1930

use_ipv6: Boolean; to use IPv6 or not

2541

1931

"""

2542

2543

1932

def __init__(self, server_address, RequestHandlerClass,

2544

interface=None,

2545

use_ipv6=True,

2546

socketfd=None):

1933

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

2547

1934

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

2548

1935

creating a new one with socket.socket().

2549

1936

"""

2555

1942

self.socketfd = socketfd

2556

1943

# Save the original socket.socket() function

2557

1944

self.socket_socket = socket.socket

2558

2559

1945

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

2560

#

1946

#

2561

1947

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

2562

1948

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

2563

1949

# patching socket.socket.)

2564

#

1950

#

2565

1951

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

2566

1952

@functools.wraps(socket.socket)

2567

1953

def socket_wrapper(*args, **kwargs):

2579

1965

# socket_wrapper(), if socketfd was set.

2580

1966

socketserver.TCPServer.__init__(self, server_address,

2581

1967

RequestHandlerClass)

2582

1968

2583

1969

def server_bind(self):

2584

1970

"""This overrides the normal server_bind() function

2585

1971

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

2586

1972

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

2587

global SO_BINDTODEVICE

2588

1973

if self.interface is not None:

2589

1974

if SO_BINDTODEVICE is None:

2590

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

2591

# common enough.

2592

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

2593

SO_BINDTODEVICE = 25

2594

try:

2595

self.socket.setsockopt(

2596

socket.SOL_SOCKET, SO_BINDTODEVICE,

2597

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

2598

except socket.error as error:

2599

if error.errno == errno.EPERM:

2600

logger.error("No permission to bind to"

2601

" interface %s", self.interface)

2602

elif error.errno == errno.ENOPROTOOPT:

2603

logger.error("SO_BINDTODEVICE not available;"

2604

" cannot bind to interface %s",

2605

self.interface)

2606

elif error.errno == errno.ENODEV:

2607

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

2608

" cannot bind", self.interface)

2609

else:

2610

raise

1975

logger.error("SO_BINDTODEVICE does not exist;"

1976

" cannot bind to interface %s",

1977

self.interface)

1978

else:

1979

try:

1980

self.socket.setsockopt(socket.SOL_SOCKET,

1981

SO_BINDTODEVICE,

1982

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

1983

except socket.error as error:

1984

if error.errno == errno.EPERM:

1985

logger.error("No permission to bind to"

1986

" interface %s", self.interface)

1987

elif error.errno == errno.ENOPROTOOPT:

1988

logger.error("SO_BINDTODEVICE not available;"

1989

" cannot bind to interface %s",

1990

self.interface)

1991

elif error.errno == errno.ENODEV:

1992

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

1993

" cannot bind", self.interface)

1994

else:

1995

raise

2611

1996

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

2612

1997

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

2613

if self.server_address[1]:

2614

self.allow_reuse_address = True

2615

1998

if not self.server_address[0]:

2616

1999

if self.address_family == socket.AF_INET6:

2617

any_address = "::" # in6addr_any

2000

any_address = "::" # in6addr_any

2618

2001

else:

2619

any_address = "0.0.0.0" # INADDR_ANY

2002

any_address = "0.0.0.0" # INADDR_ANY

2620

2003

self.server_address = (any_address,

2621

2004

self.server_address[1])

2622

2005

elif not self.server_address[1]:

2623

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

2006

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

2007

0)

2624

2008

# if self.interface:

2625

2009

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

2626

2010

# 0, # port

2632

2016

2633

2017

class MandosServer(IPv6_TCPServer):

2634

2018

"""Mandos server.

2635

2019

2636

2020

Attributes:

2637

2021

clients: set of Client objects

2638

2022

gnutls_priority GnuTLS priority string

2639

2023

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

2640

2641

Assumes a GLib.MainLoop event loop.

2024

2025

Assumes a gobject.MainLoop event loop.

2642

2026

"""

2643

2644

2027

def __init__(self, server_address, RequestHandlerClass,

2645

interface=None,

2646

use_ipv6=True,

2647

clients=None,

2648

gnutls_priority=None,

2649

use_dbus=True,

2650

socketfd=None):

2028

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

2029

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

2651

2030

self.enabled = False

2652

2031

self.clients = clients

2653

2032

if self.clients is None:

2656

2035

self.gnutls_priority = gnutls_priority

2657

2036

IPv6_TCPServer.__init__(self, server_address,

2658

2037

RequestHandlerClass,

2659

interface=interface,

2660

use_ipv6=use_ipv6,

2661

socketfd=socketfd)

2662

2038

interface = interface,

2039

use_ipv6 = use_ipv6,

2040

socketfd = socketfd)

2663

2041

def server_activate(self):

2664

2042

if self.enabled:

2665

2043

return socketserver.TCPServer.server_activate(self)

2666

2044

2667

2045

def enable(self):

2668

2046

self.enabled = True

2669

2047

2670

2048

def add_pipe(self, parent_pipe, proc):

2671

2049

# Call "handle_ipc" for both data and EOF events

2672

GLib.io_add_watch(

2673

parent_pipe.fileno(),

2674

GLib.IO_IN | GLib.IO_HUP,

2675

functools.partial(self.handle_ipc,

2676

parent_pipe=parent_pipe,

2677

proc=proc))

2678

2679

def handle_ipc(self, source, condition,

2680

parent_pipe=None,

2681

proc=None,

2682

client_object=None):

2050

gobject.io_add_watch(parent_pipe.fileno(),

2051

gobject.IO_IN | gobject.IO_HUP,

2052

functools.partial(self.handle_ipc,

2053

parent_pipe =

2054

parent_pipe,

2055

proc = proc))

2056

2057

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

2058

proc = None, client_object=None):

2683

2059

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

2684

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

2060

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

2685

2061

# Wait for other process to exit

2686

2062

proc.join()

2687

2063

return False

2688

2064

2689

2065

# Read a request from the child

2690

2066

request = parent_pipe.recv()

2691

2067

command = request[0]

2692

2068

2693

2069

if command == 'init':

2694

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

2695

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

2696

address = request[3]

2697

2698

for c in self.clients.values():

2699

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2700

continue

2701

if key_id and c.key_id == key_id:

2702

client = c

2703

break

2704

if fpr and c.fingerprint == fpr:

2070

fpr = request[1]

2071

address = request[2]

2072

2073

for c in self.clients.itervalues():

2074

if c.fingerprint == fpr:

2705

2075

client = c

2706

2076

break

2707

2077

else:

2708

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

2709

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

2078

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

2079

"dress: %s", fpr, address)

2710

2080

if self.use_dbus:

2711

2081

# Emit D-Bus signal

2712

mandos_dbus_service.ClientNotFound(key_id or fpr,

2082

mandos_dbus_service.ClientNotFound(fpr,

2713

2083

address[0])

2714

2084

parent_pipe.send(False)

2715

2085

return False

2716

2717

GLib.io_add_watch(

2718

parent_pipe.fileno(),

2719

GLib.IO_IN | GLib.IO_HUP,

2720

functools.partial(self.handle_ipc,

2721

parent_pipe=parent_pipe,

2722

proc=proc,

2723

client_object=client))

2086

2087

gobject.io_add_watch(parent_pipe.fileno(),

2088

gobject.IO_IN | gobject.IO_HUP,

2089

functools.partial(self.handle_ipc,

2090

parent_pipe =

2091

parent_pipe,

2092

proc = proc,

2093

client_object =

2094

client))

2724

2095

parent_pipe.send(True)

2725

2096

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

2726

2097

# same fileno

2729

2100

funcname = request[1]

2730

2101

args = request[2]

2731

2102

kwargs = request[3]

2732

2103

2733

2104

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

2734

2105

funcname)(*args,

2735

**kwargs)))

2736

2106

**kwargs)))

2107

2737

2108

if command == 'getattr':

2738

2109

attrname = request[1]

2739

if isinstance(client_object.__getattribute__(attrname),

2740

collections.Callable):

2741

parent_pipe.send(('function', ))

2110

if callable(client_object.__getattribute__(attrname)):

2111

parent_pipe.send(('function',))

2742

2112

else:

2743

parent_pipe.send((

2744

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

2745

2113

parent_pipe.send(('data', client_object

2114

.__getattribute__(attrname)))

2115

2746

2116

if command == 'setattr':

2747

2117

attrname = request[1]

2748

2118

value = request[2]

2749

2119

setattr(client_object, attrname, value)

2750

2120

2751

2121

return True

2752

2122

2753

2123

2754

2124

def rfc3339_duration_to_delta(duration):

2755

2125

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

2756

2126

2757

2127

>>> rfc3339_duration_to_delta("P7D")

2758

2128

datetime.timedelta(7)

2759

2129

>>> rfc3339_duration_to_delta("PT60S")

2769

2139

>>> rfc3339_duration_to_delta("P1DT3M20S")

2770

2140

datetime.timedelta(1, 200)

2771

2141

"""

2772

2142

2773

2143

# Parsing an RFC 3339 duration with regular expressions is not

2774

2144

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

2775

2145

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

2776

2146

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

2777

2147

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

2778

2148

# avoid excessive use of external libraries.

2779

2149

2780

2150

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

2781

Token = collections.namedtuple("Token", (

2782

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

2783

# a "group" containing digits

2784

"value", # datetime.timedelta or None

2785

"followers")) # Tokens valid after this token

2151

Token = collections.namedtuple("Token",

2152

("regexp", # To match token; if

2153

# "value" is not None,

2154

# must have a "group"

2155

# containing digits

2156

"value", # datetime.timedelta or

2157

# None

2158

"followers")) # Tokens valid after

2159

# this token

2786

2160

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

2787

2161

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

2788

2162

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

2789

2163

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

2790

2164

datetime.timedelta(seconds=1),

2791

frozenset((token_end, )))

2165

frozenset((token_end,)))

2792

2166

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

2793

2167

datetime.timedelta(minutes=1),

2794

2168

frozenset((token_second, token_end)))

2810

2184

frozenset((token_month, token_end)))

2811

2185

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

2812

2186

datetime.timedelta(weeks=1),

2813

frozenset((token_end, )))

2187

frozenset((token_end,)))

2814

2188

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

2815

2189

frozenset((token_year, token_month,

2816

2190

token_day, token_time,

2817

token_week)))

2818

# Define starting values:

2819

# Value so far

2820

value = datetime.timedelta()

2191

token_week))),

2192

# Define starting values

2193

value = datetime.timedelta() # Value so far

2821

2194

found_token = None

2822

# Following valid tokens

2823

followers = frozenset((token_duration, ))

2824

# String left to parse

2825

s = duration

2195

followers = frozenset(token_duration,) # Following valid tokens

2196

s = duration # String left to parse

2826

2197

# Loop until end token is found

2827

2198

while found_token is not token_end:

2828

2199

# Search for any currently valid tokens

2844

2215

break

2845

2216

else:

2846

2217

# No currently valid tokens were found

2847

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

2848

.format(duration))

2218

raise ValueError("Invalid RFC 3339 duration")

2849

2219

# End token found

2850

2220

return value

2851

2221

2852

2222

2853

2223

def string_to_delta(interval):

2854

2224

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

2855

2225

2856

2226

>>> string_to_delta('7d')

2857

2227

datetime.timedelta(7)

2858

2228

>>> string_to_delta('60s')

2866

2236

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

2867

2237

datetime.timedelta(0, 330)

2868

2238

"""

2869

2239

2870

2240

try:

2871

2241

return rfc3339_duration_to_delta(interval)

2872

2242

except ValueError:

2873

2243

pass

2874

2244

2875

2245

timevalue = datetime.timedelta(0)

2876

2246

for s in interval.split():

2877

2247

try:

2878

suffix = s[-1]

2248

suffix = unicode(s[-1])

2879

2249

value = int(s[:-1])

2880

2250

if suffix == "d":

2881

2251

delta = datetime.timedelta(value)

2888

2258

elif suffix == "w":

2889

2259

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

2890

2260

else:

2891

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

2261

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

2262

.format(suffix))

2892

2263

except IndexError as e:

2893

2264

raise ValueError(*(e.args))

2894

2265

timevalue += delta

2895

2266

return timevalue

2896

2267

2897

2268

2898

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

2269

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

2899

2270

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

2900

2271

2901

2272

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

2902

2273

if os.fork():

2903

2274

sys.exit()

2911

2282

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

2912

2283

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

2913

2284

raise OSError(errno.ENODEV,

2914

"{} not a character device"

2285

"{0} not a character device"

2915

2286

.format(os.devnull))

2916

2287

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

2917

2288

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

2921

2292

2922

2293

2923

2294

def main():

2924

2295

2925

2296

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

2926

2297

# Parsing of options, both command line and config file

2927

2298

2928

2299

parser = argparse.ArgumentParser()

2929

2300

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

2930

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

2301

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

2931

2302

help="show version number and exit")

2932

2303

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

2933

2304

help="Bind to interface IF")

2969

2340

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

2970

2341

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

2971

2342

default=None)

2972

2343

2973

2344

options = parser.parse_args()

2974

2345

2975

2346

if options.check:

2976

2347

import doctest

2977

2348

fail_count, test_count = doctest.testmod()

2978

2349

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

2979

2350

2980

2351

# Default values for config file for server-global settings

2981

if gnutls.has_rawpk:

2982

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

2983

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

2984

else:

2985

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

2986

":+SIGN-DSA-SHA256")

2987

server_defaults = {"interface": "",

2988

"address": "",

2989

"port": "",

2990

"debug": "False",

2991

"priority": priority,

2992

"servicename": "Mandos",

2993

"use_dbus": "True",

2994

"use_ipv6": "True",

2995

"debuglevel": "",

2996

"restore": "True",

2997

"socket": "",

2998

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

2999

"foreground": "False",

3000

"zeroconf": "True",

3001

}

3002

del priority

3003

2352

server_defaults = { "interface": "",

2353

"address": "",

2354

"port": "",

2355

"debug": "False",

2356

"priority":

2357

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2358

"servicename": "Mandos",

2359

"use_dbus": "True",

2360

"use_ipv6": "True",

2361

"debuglevel": "",

2362

"restore": "True",

2363

"socket": "",

2364

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

2365

"foreground": "False",

2366

"zeroconf": "True",

2367

}

2368

3004

2369

# Parse config file for server-global settings

3005

server_config = configparser.ConfigParser(server_defaults)

2370

server_config = configparser.SafeConfigParser(server_defaults)

3006

2371

del server_defaults

3007

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

3008

# Convert the ConfigParser object to a dict

2372

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

2373

"mandos.conf"))

2374

# Convert the SafeConfigParser object to a dict

3009

2375

server_settings = server_config.defaults()

3010

2376

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

3011

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

3012

"foreground", "zeroconf"):

2377

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

3013

2378

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

3014

2379

option)

3015

2380

if server_settings["port"]:

3025

2390

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

3026

2391

["socket"])

3027

2392

del server_config

3028

2393

3029

2394

# Override the settings from the config file with command line

3030

2395

# options, if set.

3031

2396

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

3032

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

3033

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

3034

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

2397

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

2398

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

2399

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

3035

2400

value = getattr(options, option)

3036

2401

if value is not None:

3037

2402

server_settings[option] = value

3038

2403

del options

3039

2404

# Force all strings to be unicode

3040

2405

for option in server_settings.keys():

3041

if isinstance(server_settings[option], bytes):

3042

server_settings[option] = (server_settings[option]

3043

.decode("utf-8"))

2406

if type(server_settings[option]) is str:

2407

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

3044

2408

# Force all boolean options to be boolean

3045

2409

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

3046

2410

"foreground", "zeroconf"):

3049

2413

if server_settings["debug"]:

3050

2414

server_settings["foreground"] = True

3051

2415

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

3052

2416

3053

2417

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

3054

3055

if (not server_settings["zeroconf"]

3056

and not (server_settings["port"]

3057

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

3058

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

3059

2418

2419

if (not server_settings["zeroconf"] and

2420

not (server_settings["port"]

2421

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

2422

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

2423

" Zeroconf")

2424

3060

2425

# For convenience

3061

2426

debug = server_settings["debug"]

3062

2427

debuglevel = server_settings["debuglevel"]

3066

2431

stored_state_file)

3067

2432

foreground = server_settings["foreground"]

3068

2433

zeroconf = server_settings["zeroconf"]

3069

2434

3070

2435

if debug:

3071

2436

initlogger(debug, logging.DEBUG)

3072

2437

else:

3075

2440

else:

3076

2441

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

3077

2442

initlogger(debug, level)

3078

2443

3079

2444

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

3080

syslogger.setFormatter(

3081

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

3082

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

3083

server_settings["servicename"])))

3084

2445

syslogger.setFormatter(logging.Formatter

2446

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

2447

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

2448

.format(server_settings

2449

["servicename"])))

2450

3085

2451

# Parse config file with clients

3086

client_config = configparser.ConfigParser(Client.client_defaults)

2452

client_config = configparser.SafeConfigParser(Client

2453

.client_defaults)

3087

2454

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

3088

2455

"clients.conf"))

3089

2456

3090

2457

global mandos_dbus_service

3091

2458

mandos_dbus_service = None

3092

2459

3093

2460

socketfd = None

3094

2461

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

3095

2462

socketfd = server_settings["socket"]

3096

tcp_server = MandosServer(

3097

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

3098

ClientHandler,

3099

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

3100

use_ipv6=use_ipv6,

3101

gnutls_priority=server_settings["priority"],

3102

use_dbus=use_dbus,

3103

socketfd=socketfd)

2463

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

2464

server_settings["port"]),

2465

ClientHandler,

2466

interface=(server_settings["interface"]

2467

or None),

2468

use_ipv6=use_ipv6,

2469

gnutls_priority=

2470

server_settings["priority"],

2471

use_dbus=use_dbus,

2472

socketfd=socketfd)

3104

2473

if not foreground:

3105

2474

pidfilename = "/run/mandos.pid"

3106

2475

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

3107

2476

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

3108

2477

pidfile = None

3109

2478

try:

3110

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

2479

pidfile = open(pidfilename, "w")

3111

2480

except IOError as e:

3112

2481

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

3113

2482

exc_info=e)

3114

3115

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

3116

("mandos", "mandos"),

3117

("nobody", "nogroup")):

2483

2484

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

3118

2485

try:

3119

2486

uid = pwd.getpwnam(name).pw_uid

3120

gid = pwd.getpwnam(group).pw_gid

2487

gid = pwd.getpwnam(name).pw_gid

3121

2488

break

3122

2489

except KeyError:

3123

2490

continue

3127

2494

try:

3128

2495

os.setgid(gid)

3129

2496

os.setuid(uid)

3130

if debug:

3131

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

3132

gid))

3133

2497

except OSError as error:

3134

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

3135

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

3136

2498

if error.errno != errno.EPERM:

3137

2499

raise

3138

2500

3139

2501

if debug:

3140

2502

# Enable all possible GnuTLS debugging

3141

2503

3142

2504

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

3143

2505

# - GnuTLS manual

3144

gnutls.global_set_log_level(11)

3145

3146

@gnutls.log_func

2506

gnutls.library.functions.gnutls_global_set_log_level(11)

2507

2508

@gnutls.library.types.gnutls_log_func

3147

2509

def debug_gnutls(level, string):

3148

2510

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

3149

3150

gnutls.global_set_log_function(debug_gnutls)

3151

2511

2512

(gnutls.library.functions

2513

.gnutls_global_set_log_function(debug_gnutls))

2514

3152

2515

# Redirect stdin so all checkers get /dev/null

3153

2516

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

3154

2517

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

3155

2518

if null > 2:

3156

2519

os.close(null)

3157

2520

3158

2521

# Need to fork before connecting to D-Bus

3159

2522

if not foreground:

3160

2523

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

3161

2524

daemon()

3162

3163

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

3164

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

3165

# need to inform GLib that threads will be used.

3166

GLib.threads_init()

3167

2525

2526

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

2527

# need to inform gobject that threads will be used.

2528

gobject.threads_init()

2529

3168

2530

global main_loop

3169

2531

# From the Avahi example code

3170

2532

DBusGMainLoop(set_as_default=True)

3171

main_loop = GLib.MainLoop()

2533

main_loop = gobject.MainLoop()

3172

2534

bus = dbus.SystemBus()

3173

2535

# End of Avahi example code

3174

2536

if use_dbus:

3175

2537

try:

3176

2538

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

3177

bus,

3178

do_not_queue=True)

3179

old_bus_name = dbus.service.BusName(

3180

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

3181

do_not_queue=True)

3182

except dbus.exceptions.DBusException as e:

2539

bus, do_not_queue=True)

2540

old_bus_name = (dbus.service.BusName

2541

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

2542

do_not_queue=True))

2543

except dbus.exceptions.NameExistsException as e:

3183

2544

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

3184

2545

use_dbus = False

3185

2546

server_settings["use_dbus"] = False

3186

2547

tcp_server.use_dbus = False

3187

2548

if zeroconf:

3188

2549

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3189

service = AvahiServiceToSyslog(

3190

name=server_settings["servicename"],

3191

servicetype="_mandos._tcp",

3192

protocol=protocol,

3193

bus=bus)

2550

service = AvahiServiceToSyslog(name =

2551

server_settings["servicename"],

2552

servicetype = "_mandos._tcp",

2553

protocol = protocol, bus = bus)

3194

2554

if server_settings["interface"]:

3195

service.interface = if_nametoindex(

3196

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

3197

2555

service.interface = (if_nametoindex

2556

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

2557

3198

2558

global multiprocessing_manager

3199

2559

multiprocessing_manager = multiprocessing.Manager()

3200

2560

3201

2561

client_class = Client

3202

2562

if use_dbus:

3203

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

3204

2563

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

2564

3205

2565

client_settings = Client.config_parser(client_config)

3206

2566

old_client_settings = {}

3207

2567

clients_data = {}

3208

2568

3209

2569

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

3210

2570

global wnull

3211

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

2571

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

3212

2572

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

3213

2573

# mode

3214

2574

if debug or not foreground:

3215

2575

wnull.close()

3216

2576

3217

2577

# Get client data and settings from last running state.

3218

2578

if server_settings["restore"]:

3219

2579

try:

3220

2580

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

3221

if sys.version_info.major == 2:

3222

clients_data, old_client_settings = pickle.load(

3223

stored_state)

3224

else:

3225

bytes_clients_data, bytes_old_client_settings = (

3226

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

3227

# Fix bytes to strings

3228

# clients_data

3229

# .keys()

3230

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

3231

if isinstance(key, bytes)

3232

else key): value

3233

for key, value in

3234

bytes_clients_data.items()}

3235

del bytes_clients_data

3236

for key in clients_data:

3237

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

3238

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

3239

for k, v in

3240

clients_data[key].items()}

3241

clients_data[key] = value

3242

# .client_structure

3243

value["client_structure"] = [

3244

(s.decode("utf-8")

3245

if isinstance(s, bytes)

3246

else s) for s in

3247

value["client_structure"]]

3248

# .name & .host

3249

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

3250

if isinstance(value[k], bytes):

3251

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

3252

if "key_id" not in value:

3253

value["key_id"] = ""

3254

elif "fingerprint" not in value:

3255

value["fingerprint"] = ""

3256

# old_client_settings

3257

# .keys()

3258

old_client_settings = {

3259

(key.decode("utf-8")

3260

if isinstance(key, bytes)

3261

else key): value

3262

for key, value in

3263

bytes_old_client_settings.items()}

3264

del bytes_old_client_settings

3265

# .host

3266

for value in old_client_settings.values():

3267

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

3268

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

3269

.decode("utf-8"))

2581

clients_data, old_client_settings = (pickle.load

2582

(stored_state))

3270

2583

os.remove(stored_state_path)

3271

2584

except IOError as e:

3272

2585

if e.errno == errno.ENOENT:

3273

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

3274

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

2586

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

2587

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

3275

2588

else:

3276

2589

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

3277

2590

exc_info=e)

3278

2591

raise

3279

2592

except EOFError as e:

3280

2593

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

3281

"EOFError:",

3282

exc_info=e)

3283

2594

"EOFError:", exc_info=e)

2595

3284

2596

with PGPEngine() as pgp:

3285

for client_name, client in clients_data.items():

2597

for client_name, client in clients_data.iteritems():

3286

2598

# Skip removed clients

3287

2599

if client_name not in client_settings:

3288

2600

continue

3289

2601

3290

2602

# Decide which value to use after restoring saved state.

3291

2603

# We have three different values: Old config file,

3292

2604

# new config file, and saved state.

3297

2609

# For each value in new config, check if it

3298

2610

# differs from the old config value (Except for

3299

2611

# the "secret" attribute)

3300

if (name != "secret"

3301

and (value !=

3302

old_client_settings[client_name][name])):

2612

if (name != "secret" and

2613

value != old_client_settings[client_name]

2614

[name]):

3303

2615

client[name] = value

3304

2616

except KeyError:

3305

2617

pass

3306

2618

3307

2619

# Clients who has passed its expire date can still be

3308

# enabled if its last checker was successful. A Client

2620

# enabled if its last checker was successful. Clients

3309

2621

# whose checker succeeded before we stored its state is

3310

2622

# assumed to have successfully run all checkers during

3311

2623

# downtime.

3313

2625

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

3314

2626

if not client["last_checked_ok"]:

3315

2627

logger.warning(

3316

"disabling client {} - Client never "

3317

"performed a successful checker".format(

3318

client_name))

2628

"disabling client {0} - Client never "

2629

"performed a successful checker"

2630

.format(client_name))

3319

2631

client["enabled"] = False

3320

2632

elif client["last_checker_status"] != 0:

3321

2633

logger.warning(

3322

"disabling client {} - Client last"

3323

" checker failed with error code"

3324

" {}".format(

3325

client_name,

3326

client["last_checker_status"]))

2634

"disabling client {0} - Client "

2635

"last checker failed with error code {1}"

2636

.format(client_name,

2637

client["last_checker_status"]))

3327

2638

client["enabled"] = False

3328

2639

else:

3329

client["expires"] = (

3330

datetime.datetime.utcnow()

3331

+ client["timeout"])

2640

client["expires"] = (datetime.datetime

2641

.utcnow()

2642

+ client["timeout"])

3332

2643

logger.debug("Last checker succeeded,"

3333

" keeping {} enabled".format(

3334

client_name))

2644

" keeping {0} enabled"

2645

.format(client_name))

3335

2646

try:

3336

client["secret"] = pgp.decrypt(

3337

client["encrypted_secret"],

3338

client_settings[client_name]["secret"])

2647

client["secret"] = (

2648

pgp.decrypt(client["encrypted_secret"],

2649

client_settings[client_name]

2650

["secret"]))

3339

2651

except PGPError:

3340

2652

# If decryption fails, we use secret from new settings

3341

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

3342

client_name))

3343

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

3344

["secret"])

3345

2653

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

2654

.format(client_name))

2655

client["secret"] = (

2656

client_settings[client_name]["secret"])

2657

3346

2658

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

3347

2659

for client_name in (set(old_client_settings)

3348

2660

- set(client_settings)):

3350

2662

for client_name in (set(client_settings)

3351

2663

- set(old_client_settings)):

3352

2664

clients_data[client_name] = client_settings[client_name]

3353

2665

3354

2666

# Create all client objects

3355

for client_name, client in clients_data.items():

2667

for client_name, client in clients_data.iteritems():

3356

2668

tcp_server.clients[client_name] = client_class(

3357

name=client_name,

3358

settings=client,

3359

server_settings=server_settings)

3360

2669

name = client_name, settings = client,

2670

server_settings = server_settings)

2671

3361

2672

if not tcp_server.clients:

3362

2673

logger.warning("No clients defined")

3363

2674

3364

2675

if not foreground:

3365

2676

if pidfile is not None:

3366

pid = os.getpid()

3367

2677

try:

3368

2678

with pidfile:

3369

print(pid, file=pidfile)

2679

pid = os.getpid()

2680

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

3370

2681

except IOError:

3371

2682

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

3372

2683

pidfilename, pid)

3373

2684

del pidfile

3374

2685

del pidfilename

3375

3376

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

3377

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3378

lambda: main_loop.quit() and False)

3379

2686

2687

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

2688

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

2689

3380

2690

if use_dbus:

3381

3382

@alternate_dbus_interfaces(

3383

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

3384

class MandosDBusService(DBusObjectWithObjectManager):

2691

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

2692

"se.bsnet.fukt.Mandos"})

2693

class MandosDBusService(DBusObjectWithProperties):

3385

2694

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

3386

3387

2695

def __init__(self):

3388

2696

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

3389

3390

2697

_interface = "se.recompile.Mandos"

3391

2698

2699

@dbus_interface_annotations(_interface)

2700

def _foo(self):

2701

return { "org.freedesktop.DBus.Property"

2702

".EmitsChangedSignal":

2703

"false"}

2704

3392

2705

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

3393

2706

def ClientAdded(self, objpath):

3394

2707

"D-Bus signal"

3395

2708

pass

3396

2709

3397

2710

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

3398

def ClientNotFound(self, key_id, address):

2711

def ClientNotFound(self, fingerprint, address):

3399

2712

"D-Bus signal"

3400

2713

pass

3401

3402

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

3403

"true"})

2714

3404

2715

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

3405

2716

def ClientRemoved(self, objpath, name):

3406

2717

"D-Bus signal"

3407

2718

pass

3408

3409

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

3410

"true"})

2719

3411

2720

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

3412

2721

def GetAllClients(self):

3413

2722

"D-Bus method"

3414

return dbus.Array(c.dbus_object_path for c in

3415

tcp_server.clients.values())

3416

3417

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

3418

"true"})

2723

return dbus.Array(c.dbus_object_path

2724

for c in

2725

tcp_server.clients.itervalues())

2726

3419

2727

@dbus.service.method(_interface,

3420

2728

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

3421

2729

def GetAllClientsWithProperties(self):

3422

2730

"D-Bus method"

3423

2731

return dbus.Dictionary(

3424

{c.dbus_object_path: c.GetAll(

3425

"se.recompile.Mandos.Client")

3426

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

2732

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

2733

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

3427

2734

signature="oa{sv}")

3428

2735

3429

2736

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

3430

2737

def RemoveClient(self, object_path):

3431

2738

"D-Bus method"

3432

for c in tcp_server.clients.values():

2739

for c in tcp_server.clients.itervalues():

3433

2740

if c.dbus_object_path == object_path:

3434

2741

del tcp_server.clients[c.name]

3435

2742

c.remove_from_connection()

3436

# Don't signal the disabling

2743

# Don't signal anything except ClientRemoved

3437

2744

c.disable(quiet=True)

3438

# Emit D-Bus signal for removal

3439

self.client_removed_signal(c)

2745

# Emit D-Bus signal

2746

self.ClientRemoved(object_path, c.name)

3440

2747

return

3441

2748

raise KeyError(object_path)

3442

2749

3443

2750

del _interface

3444

3445

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3446

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

3447

def GetManagedObjects(self):

3448

"""D-Bus method"""

3449

return dbus.Dictionary(

3450

{client.dbus_object_path:

3451

dbus.Dictionary(

3452

{interface: client.GetAll(interface)

3453

for interface in

3454

client._get_all_interface_names()})

3455

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

3456

3457

def client_added_signal(self, client):

3458

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

3459

if use_dbus:

3460

# New standard signal

3461

self.InterfacesAdded(

3462

client.dbus_object_path,

3463

dbus.Dictionary(

3464

{interface: client.GetAll(interface)

3465

for interface in

3466

client._get_all_interface_names()}))

3467

# Old signal

3468

self.ClientAdded(client.dbus_object_path)

3469

3470

def client_removed_signal(self, client):

3471

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

3472

if use_dbus:

3473

# New standard signal

3474

self.InterfacesRemoved(

3475

client.dbus_object_path,

3476

client._get_all_interface_names())

3477

# Old signal

3478

self.ClientRemoved(client.dbus_object_path,

3479

client.name)

3480

2751

3481

2752

mandos_dbus_service = MandosDBusService()

3482

3483

# Save modules to variables to exempt the modules from being

3484

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

3485

mp = multiprocessing

3486

wn = wnull

3487

2753

3488

2754

def cleanup():

3489

2755

"Cleanup function; run on exit"

3490

2756

if zeroconf:

3491

2757

service.cleanup()

3492

3493

mp.active_children()

3494

wn.close()

2758

2759

multiprocessing.active_children()

2760

wnull.close()

3495

2761

if not (tcp_server.clients or client_settings):

3496

2762

return

3497

2763

3498

2764

# Store client before exiting. Secrets are encrypted with key

3499

2765

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

3500

2766

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

3501

2767

clients = {}

3502

2768

with PGPEngine() as pgp:

3503

for client in tcp_server.clients.values():

2769

for client in tcp_server.clients.itervalues():

3504

2770

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

3505

2771

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

3506

2772

key)

3507

2773

client_dict = {}

3508

2774

3509

2775

# A list of attributes that can not be pickled

3510

2776

# + secret.

3511

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

3512

"checker", "server_settings"}

3513

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

3514

.Object):

2777

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

2778

"checker", "server_settings"))

2779

for name, typ in (inspect.getmembers

2780

(dbus.service.Object)):

3515

2781

exclude.add(name)

3516

2782

3517

2783

client_dict["encrypted_secret"] = (client

3518

2784

.encrypted_secret)

3519

2785

for attr in client.client_structure:

3520

2786

if attr not in exclude:

3521

2787

client_dict[attr] = getattr(client, attr)

3522

2788

3523

2789

clients[client.name] = client_dict

3524

2790

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

3525

2791

3526

2792

try:

3527

with tempfile.NamedTemporaryFile(

3528

mode='wb',

3529

suffix=".pickle",

3530

prefix='clients-',

3531

dir=os.path.dirname(stored_state_path),

3532

delete=False) as stored_state:

3533

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

3534

protocol=2)

3535

tempname = stored_state.name

2793

with (tempfile.NamedTemporaryFile

2794

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

2795

dir=os.path.dirname(stored_state_path),

2796

delete=False)) as stored_state:

2797

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

2798

tempname=stored_state.name

3536

2799

os.rename(tempname, stored_state_path)

3537

2800

except (IOError, OSError) as e:

3538

2801

if not debug:

3541

2804

except NameError:

3542

2805

pass

3543

2806

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

3544

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

2807

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

3545

2808

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

3546

2809

else:

3547

2810

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

3548

2811

exc_info=e)

3549

2812

raise

3550

2813

3551

2814

# Delete all clients, and settings from config

3552

2815

while tcp_server.clients:

3553

2816

name, client = tcp_server.clients.popitem()

3554

2817

if use_dbus:

3555

2818

client.remove_from_connection()

3556

# Don't signal the disabling

2819

# Don't signal anything except ClientRemoved

3557

2820

client.disable(quiet=True)

3558

# Emit D-Bus signal for removal

3559

2821

if use_dbus:

3560

mandos_dbus_service.client_removed_signal(client)

2822

# Emit D-Bus signal

2823

mandos_dbus_service.ClientRemoved(client

2824

.dbus_object_path,

2825

client.name)

3561

2826

client_settings.clear()

3562

2827

3563

2828

atexit.register(cleanup)

3564

3565

for client in tcp_server.clients.values():

2829

2830

for client in tcp_server.clients.itervalues():

3566

2831

if use_dbus:

3567

# Emit D-Bus signal for adding

3568

mandos_dbus_service.client_added_signal(client)

2832

# Emit D-Bus signal

2833

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3569

2834

# Need to initiate checking of clients

3570

2835

if client.enabled:

3571

2836

client.init_checker()

3572

2837

3573

2838

tcp_server.enable()

3574

2839

tcp_server.server_activate()

3575

2840

3576

2841

# Find out what port we got

3577

2842

if zeroconf:

3578

2843

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

3583

2848

else: # IPv4

3584

2849

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

3585

2850

*tcp_server.socket.getsockname())

3586

3587

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

3588

2851

2852

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

2853

3589

2854

try:

3590

2855

if zeroconf:

3591

2856

# From the Avahi example code

3596

2861

cleanup()

3597

2862

sys.exit(1)

3598

2863

# End of Avahi example code

3599

3600

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

3601

lambda *args, **kwargs:

3602

(tcp_server.handle_request

3603

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

3604

2864

2865

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

2866

lambda *args, **kwargs:

2867

(tcp_server.handle_request

2868

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

2869

3605

2870

logger.debug("Starting main loop")

3606

2871

main_loop.run()

3607

2872

except AvahiError as error:

3616

2881

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

3617

2882

cleanup()

3618

2883

3619

3620

2884

if __name__ == '__main__':

3621

2885

main()